/* roulang page: index */
:root {
            --primary: #6b7d8e;
            --primary-dark: #4e5f6e;
            --primary-light: #8fa3b3;
            --primary-bg: #f3f6f8;
            --accent: #b8a992;
            --accent-light: #d8cdbd;
            --bg: #faf9f7;
            --card-bg: #ffffff;
            --text-primary: #1c1e21;
            --text-secondary: #3d4348;
            --text-muted: #6f767d;
            --text-light: #9aa1a7;
            --border: #e2e6ea;
            --border-light: #edf0f2;
            --footer-bg: #1a1d20;
            --footer-text: #c6ccd1;
            --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.04);
            --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.06);
            --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.08);
            --radius-sm: 6px;
            --radius-md: 12px;
            --radius-lg: 16px;
            --radius-full: 999px;
            --font-sans: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", "Source Han Sans SC", "System UI", -apple-system, "Segoe UI", Roboto, sans-serif;
            --transition: all 0.25s cubic-bezier(0.25, 0.46, 0.45, 0.94);
            --transition-slow: all 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
            --container-max: 1240px;
            --header-height: 68px;
            --section-gap: 96px;
            --section-gap-mobile: 64px;
        }

        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }

        body {
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.75;
            color: var(--text-secondary);
            background-color: var(--bg);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            overflow-x: hidden;
        }

        a {
            color: var(--text-primary);
            text-decoration: none;
            transition: var(--transition);
        }

        a:hover {
            color: var(--primary);
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
        }

        button,
        input,
        select,
        textarea {
            font-family: inherit;
            font-size: inherit;
            line-height: inherit;
        }

        button {
            cursor: pointer;
            border: none;
            background: none;
        }

        ul,
        ol {
            list-style: none;
        }

        .container {
            max-width: var(--container-max);
            margin: 0 auto;
            padding: 0 24px;
        }

        .section {
            padding: var(--section-gap) 0;
        }

        .section--tight {
            padding: 64px 0;
        }

        .section--bg-light {
            background-color: var(--primary-bg);
        }

        .section--bg-white {
            background-color: var(--card-bg);
        }

        .section-header {
            margin-bottom: 48px;
        }

        .section-header h2 {
            font-size: 2.1rem;
            font-weight: 500;
            color: var(--text-primary);
            letter-spacing: 0.03em;
            line-height: 1.3;
            margin-bottom: 16px;
        }

        .section-header p {
            font-size: 1.05rem;
            color: var(--text-muted);
            max-width: 640px;
            line-height: 1.8;
        }

        .section-tag {
            display: inline-block;
            font-size: 0.82rem;
            color: var(--primary);
            letter-spacing: 0.08em;
            text-transform: uppercase;
            margin-bottom: 12px;
            font-weight: 500;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 0 24px;
            height: 48px;
            border-radius: var(--radius-sm);
            font-size: 0.95rem;
            font-weight: 500;
            letter-spacing: 0.03em;
            transition: var(--transition);
            white-space: nowrap;
            line-height: 1;
            gap: 8px;
        }

        .btn-primary {
            background-color: var(--text-primary);
            color: #fff;
            box-shadow: var(--shadow-sm);
        }
        .btn-primary:hover {
            background-color: var(--primary-dark);
            color: #fff;
            box-shadow: var(--shadow-md);
            transform: translateY(-1px);
        }
        .btn-primary:active {
            transform: translateY(0);
            box-shadow: var(--shadow-sm);
        }
        .btn-primary:focus-visible {
            outline: 3px solid rgba(107, 125, 142, 0.35);
            outline-offset: 2px;
        }

        .btn-secondary {
            background-color: transparent;
            color: var(--text-primary);
            border: 1px solid var(--border);
        }
        .btn-secondary:hover {
            background-color: var(--primary-bg);
            border-color: var(--primary-light);
            color: var(--primary-dark);
        }
        .btn-secondary:active {
            background-color: var(--border-light);
        }
        .btn-secondary:focus-visible {
            outline: 3px solid rgba(107, 125, 142, 0.35);
            outline-offset: 2px;
        }

        .btn-small {
            height: 40px;
            padding: 0 18px;
            font-size: 0.88rem;
        }

        .text-link {
            color: var(--text-primary);
            font-weight: 500;
            border-bottom: 1px solid var(--accent-light);
            padding-bottom: 2px;
            transition: var(--transition);
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }
        .text-link:hover {
            color: var(--primary);
            border-bottom-color: var(--primary);
        }

        .badge {
            display: inline-block;
            font-size: 0.78rem;
            padding: 4px 12px;
            border-radius: var(--radius-full);
            background-color: var(--primary-bg);
            color: var(--primary-dark);
            letter-spacing: 0.04em;
            font-weight: 500;
            border: 1px solid var(--border-light);
        }

        /* Header / Navigation */
        .header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            height: var(--header-height);
            background-color: rgba(250, 249, 247, 0.96);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            z-index: 1000;
            transition: var(--transition);
            border-bottom: 1px solid transparent;
        }
        .header.scrolled {
            border-bottom-color: var(--border);
            box-shadow: var(--shadow-sm);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: var(--header-height);
            max-width: var(--container-max);
            margin: 0 auto;
            padding: 0 24px;
        }
        .logo {
            font-size: 1.35rem;
            font-weight: 600;
            letter-spacing: 0.08em;
            color: var(--text-primary);
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .logo-mark {
            width: 32px;
            height: 32px;
            border-radius: 50%;
            background-color: var(--text-primary);
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 0.85rem;
            font-weight: 600;
            letter-spacing: 0;
            flex-shrink: 0;
        }
        .nav {
            display: flex;
            align-items: center;
            gap: 28px;
        }
        .nav-links {
            display: flex;
            align-items: center;
            gap: 24px;
        }
        .nav-links a {
            font-size: 0.92rem;
            color: var(--text-secondary);
            letter-spacing: 0.05em;
            padding: 8px 2px;
            position: relative;
            transition: var(--transition);
            white-space: nowrap;
        }
        .nav-links a::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 0;
            right: 0;
            height: 2px;
            background-color: var(--primary);
            transform: scaleX(0);
            transform-origin: left center;
            transition: transform 0.3s ease;
        }
        .nav-links a:hover {
            color: var(--primary-dark);
        }
        .nav-links a:hover::after {
            transform: scaleX(1);
        }
        .nav-links a.active {
            color: var(--primary-dark);
            font-weight: 500;
        }
        .nav-links a.active::after {
            transform: scaleX(1);
        }
        .header-actions {
            display: flex;
            align-items: center;
            gap: 14px;
        }
        .lang-switch {
            display: flex;
            align-items: center;
            background-color: var(--border-light);
            border-radius: var(--radius-full);
            padding: 3px;
            font-size: 0.78rem;
            letter-spacing: 0.04em;
        }
        .lang-switch button {
            padding: 6px 14px;
            border-radius: var(--radius-full);
            color: var(--text-muted);
            font-size: 0.78rem;
            font-weight: 500;
            transition: var(--transition);
        }
        .lang-switch button.active {
            background-color: var(--text-primary);
            color: #fff;
        }
        .lang-switch button:hover:not(.active) {
            color: var(--text-primary);
            background-color: rgba(107, 125, 142, 0.1);
        }
        .nav-cta {
            margin-left: 4px;
        }
        .hamburger {
            display: none;
            flex-direction: column;
            gap: 5px;
            padding: 8px;
            cursor: pointer;
            border-radius: var(--radius-sm);
        }
        .hamburger span {
            width: 24px;
            height: 2px;
            background-color: var(--text-primary);
            transition: var(--transition);
            transform-origin: center;
        }
        .hamburger:hover span {
            background-color: var(--primary);
        }

        /* Mobile drawer */
        .mobile-drawer {
            display: none;
            position: fixed;
            top: var(--header-height);
            left: 0;
            right: 0;
            bottom: 0;
            background-color: var(--bg);
            z-index: 999;
            padding: 24px;
            flex-direction: column;
            gap: 16px;
            overflow-y: auto;
            border-top: 1px solid var(--border);
        }
        .mobile-drawer.open {
            display: flex;
        }
        .mobile-drawer a {
            font-size: 1.1rem;
            color: var(--text-primary);
            padding: 12px 0;
            border-bottom: 1px solid var(--border-light);
            letter-spacing: 0.04em;
        }
        .mobile-drawer a:hover {
            color: var(--primary);
        }
        .mobile-drawer .lang-switch {
            margin-top: 12px;
            align-self: flex-start;
        }
        .mobile-drawer .btn {
            margin-top: 12px;
            width: 100%;
        }

        /* Hero */
        .hero {
            position: relative;
            min-height: 100vh;
            display: flex;
            align-items: center;
            justify-content: center;
            background-image: linear-gradient(rgba(250, 249, 247, 0.72), rgba(243, 246, 248, 0.86)), url('/assets/images/backpic/back-1.webp');
            background-size: cover;
            background-position: center;
            background-repeat: no-repeat;
            padding: calc(var(--header-height) + 40px) 24px 60px;
            text-align: center;
        }
        .hero-content {
            max-width: 860px;
            margin: 0 auto;
        }
        .hero-tag {
            display: inline-block;
            font-size: 0.85rem;
            letter-spacing: 0.1em;
            color: var(--primary-dark);
            background-color: rgba(255, 255, 255, 0.7);
            padding: 6px 18px;
            border-radius: var(--radius-full);
            margin-bottom: 20px;
            font-weight: 500;
            border: 1px solid var(--border-light);
        }
        .hero h1 {
            font-size: 3.2rem;
            font-weight: 500;
            color: var(--text-primary);
            letter-spacing: 0.04em;
            line-height: 1.25;
            margin-bottom: 20px;
        }
        .hero-subtitle {
            font-size: 1.12rem;
            color: var(--text-secondary);
            max-width: 640px;
            margin: 0 auto 32px;
            line-height: 1.85;
        }
        .hero-actions {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 16px;
            flex-wrap: wrap;
            margin-bottom: 36px;
        }
        .hero-countdown {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 20px;
            flex-wrap: wrap;
            background-color: rgba(255, 255, 255, 0.72);
            backdrop-filter: blur(8px);
            -webkit-backdrop-filter: blur(8px);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-md);
            padding: 16px 28px;
            max-width: 560px;
            margin: 0 auto;
        }
        .hero-countdown-label {
            font-size: 0.82rem;
            color: var(--text-muted);
            letter-spacing: 0.08em;
            font-weight: 500;
        }
        .countdown-item {
            text-align: center;
            min-width: 48px;
        }
        .countdown-item span {
            display: block;
            font-size: 1.6rem;
            font-weight: 600;
            color: var(--text-primary);
            line-height: 1.2;
            font-variant-numeric: tabular-nums;
        }
        .countdown-item small {
            font-size: 0.72rem;
            color: var(--text-muted);
            letter-spacing: 0.04em;
        }
        .countdown-divider {
            font-size: 1.4rem;
            color: var(--text-muted);
            font-weight: 300;
        }

        /* App/Services - numbered rows */
        .service-row {
            display: flex;
            flex-direction: column;
            gap: 0;
            border-top: 1px solid var(--border-light);
        }
        .service-row-item {
            display: flex;
            align-items: flex-start;
            gap: 28px;
            padding: 28px 8px;
            border-bottom: 1px solid var(--border-light);
            transition: var(--transition);
            cursor: default;
        }
        .service-row-item:hover {
            background-color: rgba(243, 246, 248, 0.55);
            padding-left: 16px;
        }
        .service-number {
            font-size: 1.1rem;
            font-weight: 600;
            color: var(--primary);
            min-width: 44px;
            letter-spacing: 0.06em;
            font-variant-numeric: tabular-nums;
            line-height: 1.6;
        }
        .service-content {
            flex: 1;
        }
        .service-content h3 {
            font-size: 1.2rem;
            font-weight: 500;
            color: var(--text-primary);
            letter-spacing: 0.03em;
            margin-bottom: 6px;
        }
        .service-content p {
            font-size: 0.95rem;
            color: var(--text-muted);
            line-height: 1.75;
        }
        .service-arrow {
            color: var(--text-light);
            font-size: 1.2rem;
            transition: var(--transition);
            align-self: center;
            flex-shrink: 0;
        }
        .service-row-item:hover .service-arrow {
            color: var(--primary);
            transform: translateX(4px);
        }

        /* Data strip */
        .data-strip {
            display: flex;
            flex-wrap: wrap;
            gap: 32px;
            justify-content: space-between;
            padding: 32px 0;
        }
        .data-item {
            flex: 1;
            min-width: 160px;
            text-align: center;
            padding: 0 16px;
            border-right: 1px solid var(--border-light);
        }
        .data-item:last-child {
            border-right: none;
        }
        .data-item span {
            display: block;
            font-size: 2.2rem;
            font-weight: 500;
            color: var(--text-primary);
            letter-spacing: 0.02em;
            font-variant-numeric: tabular-nums;
            line-height: 1.2;
            margin-bottom: 6px;
        }
        .data-item small {
            font-size: 0.85rem;
            color: var(--text-muted);
            letter-spacing: 0.04em;
        }

        /* Brand intro */
        .brand-intro {
            display: grid;
            grid-template-columns: 1fr 1.2fr;
            gap: 56px;
            align-items: center;
        }
        .brand-intro-image {
            border-radius: var(--radius-lg);
            overflow: hidden;
            background-color: var(--border-light);
            aspect-ratio: 4 / 3;
            box-shadow: var(--shadow-md);
        }
        .brand-intro-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.6s ease;
        }
        .brand-intro-image:hover img {
            transform: scale(1.03);
        }
        .brand-intro-text h2 {
            font-size: 1.9rem;
            font-weight: 500;
            color: var(--text-primary);
            letter-spacing: 0.03em;
            line-height: 1.35;
            margin-bottom: 20px;
        }
        .brand-intro-text p {
            font-size: 1rem;
            color: var(--text-secondary);
            line-height: 1.9;
            margin-bottom: 16px;
        }
        .brand-intro-text p:last-child {
            margin-bottom: 0;
        }

        /* Info/news */
        .news-layout {
            display: grid;
            grid-template-columns: 1.4fr 0.8fr;
            gap: 40px;
        }
        .news-list {
            display: flex;
            flex-direction: column;
            gap: 0;
        }
        .news-list-item {
            display: flex;
            align-items: baseline;
            gap: 16px;
            padding: 18px 8px;
            border-bottom: 1px solid var(--border-light);
            transition: var(--transition);
        }
        .news-list-item:hover {
            background-color: rgba(243, 246, 248, 0.5);
        }
        .news-list-item .news-index {
            font-size: 0.78rem;
            color: var(--text-light);
            min-width: 28px;
            letter-spacing: 0.06em;
            font-variant-numeric: tabular-nums;
        }
        .news-list-item .news-title {
            flex: 1;
            font-size: 0.98rem;
            color: var(--text-primary);
            font-weight: 500;
            letter-spacing: 0.02em;
        }
        .news-list-item .news-date {
            font-size: 0.78rem;
            color: var(--text-muted);
            white-space: nowrap;
        }
        .news-recommend {
            background-color: var(--card-bg);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-md);
            padding: 28px;
            box-shadow: var(--shadow-sm);
        }
        .news-recommend h4 {
            font-size: 1.05rem;
            font-weight: 500;
            color: var(--text-primary);
            letter-spacing: 0.03em;
            margin-bottom: 16px;
        }
        .news-recommend-item {
            display: flex;
            align-items: center;
            gap: 12px;
            padding: 12px 0;
            border-bottom: 1px solid var(--border-light);
        }
        .news-recommend-item:last-child {
            border-bottom: none;
        }
        .news-recommend-item img {
            width: 56px;
            height: 56px;
            border-radius: var(--radius-sm);
            object-fit: cover;
            flex-shrink: 0;
        }
        .news-recommend-item .rec-info {
            flex: 1;
        }
        .news-recommend-item .rec-info strong {
            font-size: 0.88rem;
            color: var(--text-primary);
            font-weight: 500;
            display: block;
            line-height: 1.4;
            margin-bottom: 2px;
        }
        .news-recommend-item .rec-info span {
            font-size: 0.76rem;
            color: var(--text-muted);
        }

        /* Scenario demo */
        .scene-demo {
            display: grid;
            grid-template-columns: 1fr 1.25fr;
            gap: 48px;
            align-items: center;
        }
        .scene-demo-text h3 {
            font-size: 1.6rem;
            font-weight: 500;
            color: var(--text-primary);
            letter-spacing: 0.03em;
            line-height: 1.4;
            margin-bottom: 16px;
        }
        .scene-demo-text p {
            font-size: 1rem;
            color: var(--text-secondary);
            line-height: 1.85;
            margin-bottom: 16px;
        }
        .scene-steps {
            display: flex;
            flex-direction: column;
            gap: 14px;
        }
        .scene-step {
            display: flex;
            align-items: flex-start;
            gap: 14px;
            padding: 16px 18px;
            background-color: var(--card-bg);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
        }
        .scene-step:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-1px);
        }
        .scene-step-num {
            width: 28px;
            height: 28px;
            border-radius: 50%;
            background-color: var(--primary-bg);
            color: var(--primary-dark);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 0.8rem;
            font-weight: 600;
            flex-shrink: 0;
        }
        .scene-step-content h4 {
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--text-primary);
            margin-bottom: 3px;
        }
        .scene-step-content p {
            font-size: 0.86rem;
            color: var(--text-muted);
            line-height: 1.65;
            margin-bottom: 0;
        }

        /* Perspectives */
        .perspective-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .perspective-card {
            background-color: var(--card-bg);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-md);
            padding: 28px;
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
        }
        .perspective-card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-2px);
        }
        .perspective-card .quote-mark {
            font-size: 1.8rem;
            color: var(--accent-light);
            line-height: 1;
            margin-bottom: 12px;
        }
        .perspective-card blockquote {
            font-size: 0.95rem;
            color: var(--text-secondary);
            line-height: 1.8;
            font-style: normal;
            margin-bottom: 16px;
        }
        .perspective-card .perspective-meta {
            font-size: 0.78rem;
            color: var(--text-muted);
            letter-spacing: 0.04em;
        }

        /* FAQ */
        .faq-list {
            max-width: 760px;
            margin: 0 auto;
        }
        .faq-item {
            border: 1px solid var(--border-light);
            border-radius: var(--radius-md);
            margin-bottom: 12px;
            background-color: var(--card-bg);
            transition: var(--transition);
            overflow: hidden;
        }
        .faq-item.active {
            border-color: var(--primary-light);
            background-color: rgba(243, 246, 248, 0.5);
        }
        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 18px 24px;
            cursor: pointer;
            gap: 16px;
            user-select: none;
        }
        .faq-question h3 {
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--text-primary);
            letter-spacing: 0.02em;
            line-height: 1.5;
        }
        .faq-question .faq-icon {
            font-size: 1.3rem;
            color: var(--text-muted);
            transition: var(--transition);
            flex-shrink: 0;
            width: 24px;
            text-align: center;
            line-height: 1;
        }
        .faq-item.active .faq-icon {
            transform: rotate(45deg);
            color: var(--primary);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease, padding 0.35s ease;
            padding: 0 24px;
        }
        .faq-item.active .faq-answer {
            max-height: 300px;
            padding: 0 24px 20px;
        }
        .faq-answer p {
            font-size: 0.9rem;
            color: var(--text-secondary);
            line-height: 1.8;
        }

        /* CTA / Contact */
        .contact-layout {
            display: grid;
            grid-template-columns: 0.9fr 1.1fr;
            gap: 48px;
        }
        .contact-info h2 {
            font-size: 1.8rem;
            font-weight: 500;
            color: var(--text-primary);
            letter-spacing: 0.03em;
            margin-bottom: 16px;
        }
        .contact-info p {
            font-size: 1rem;
            color: var(--text-secondary);
            line-height: 1.85;
            margin-bottom: 20px;
        }
        .contact-detail-item {
            display: flex;
            align-items: flex-start;
            gap: 12px;
            margin-bottom: 14px;
            font-size: 0.92rem;
            color: var(--text-secondary);
        }
        .contact-detail-item .icon {
            width: 20px;
            text-align: center;
            color: var(--primary);
            flex-shrink: 0;
        }
        .contact-form {
            background-color: var(--card-bg);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-md);
            padding: 32px;
            box-shadow: var(--shadow-sm);
        }
        .form-group {
            margin-bottom: 18px;
        }
        .form-group label {
            display: block;
            font-size: 0.86rem;
            color: var(--text-secondary);
            font-weight: 500;
            margin-bottom: 6px;
            letter-spacing: 0.02em;
        }
        .form-group label .required {
            color: var(--primary);
            margin-left: 2px;
        }
        .form-group input,
        .form-group select,
        .form-group textarea {
            width: 100%;
            padding: 12px 14px;
            border: 1px solid var(--border);
            border-radius: var(--radius-sm);
            font-size: 0.92rem;
            color: var(--text-primary);
            background-color: #fff;
            transition: var(--transition);
            font-family: inherit;
        }
        .form-group input:focus,
        .form-group select:focus,
        .form-group textarea:focus {
            outline: none;
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(107, 125, 142, 0.15);
        }
        .form-group textarea {
            min-height: 110px;
            resize: vertical;
        }
        .form-row {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 16px;
        }
        .form-submit {
            width: 100%;
            height: 48px;
            background-color: var(--text-primary);
            color: #fff;
            border-radius: var(--radius-sm);
            font-size: 0.95rem;
            font-weight: 500;
            letter-spacing: 0.04em;
            transition: var(--transition);
            border: none;
            cursor: pointer;
        }
        .form-submit:hover {
            background-color: var(--primary-dark);
            box-shadow: var(--shadow-md);
        }
        .form-submit:active {
            transform: translateY(1px);
        }
        .form-submit:focus-visible {
            outline: 3px solid rgba(107, 125, 142, 0.35);
            outline-offset: 2px;
        }

        /* Footer */
        .footer {
            background-color: var(--footer-bg);
            color: var(--footer-text);
            padding: 56px 0 28px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.2fr 1fr 1fr 1fr;
            gap: 36px;
            margin-bottom: 40px;
        }
        .footer-brand .logo {
            color: #fff;
            font-size: 1.2rem;
            margin-bottom: 12px;
        }
        .footer-brand .logo-mark {
            background-color: #fff;
            color: var(--footer-bg);
        }
        .footer-brand p {
            font-size: 0.86rem;
            color: var(--footer-text);
            line-height: 1.7;
            max-width: 260px;
        }
        .footer-col h4 {
            font-size: 0.86rem;
            color: #fff;
            font-weight: 500;
            letter-spacing: 0.06em;
            margin-bottom: 16px;
            text-transform: uppercase;
        }
        .footer-col a {
            display: block;
            font-size: 0.86rem;
            color: var(--footer-text);
            padding: 5px 0;
            transition: var(--transition);
        }
        .footer-col a:hover {
            color: #fff;
        }
        .footer-bottom {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 16px;
            padding-top: 20px;
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            font-size: 0.78rem;
        }
        .footer-bottom p {
            color: var(--footer-text);
        }
        .footer-bottom-links {
            display: flex;
            align-items: center;
            gap: 16px;
            flex-wrap: wrap;
        }
        .footer-bottom-links a {
            color: var(--footer-text);
            font-size: 0.78rem;
            transition: var(--transition);
        }
        .footer-bottom-links a:hover {
            color: #fff;
        }

        /* Responsive */
        @media (max-width: 1199px) {
            .container {
                padding: 0 32px;
            }
            .hero h1 {
                font-size: 2.6rem;
            }
            .brand-intro {
                gap: 36px;
            }
            .perspective-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .footer-grid {
                grid-template-columns: 1.2fr 1fr 1fr;
            }
        }

        @media (max-width: 1024px) {
            :root {
                --section-gap: 72px;
            }
            .nav-links {
                gap: 16px;
            }
            .nav-links a {
                font-size: 0.86rem;
            }
            .news-layout {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .scene-demo {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            .contact-layout {
                grid-template-columns: 1fr;
                gap: 28px;
            }
        }

        @media (max-width: 768px) {
            :root {
                --section-gap: 64px;
                --header-height: 60px;
            }
            .container {
                padding: 0 20px;
            }
            .section {
                padding: var(--section-gap-mobile) 0;
            }
            .section--tight {
                padding: 40px 0;
            }
            .nav-links {
                display: none;
            }
            .nav-cta {
                display: none;
            }
            .hamburger {
                display: flex;
            }
            .mobile-drawer {
                display: none;
            }
            .mobile-drawer.open {
                display: flex;
            }
            .header-inner {
                padding: 0 20px;
            }
            .hero {
                padding: calc(var(--header-height) + 24px) 20px 40px;
                min-height: auto;
            }
            .hero h1 {
                font-size: 2rem;
                letter-spacing: 0.02em;
            }
            .hero-subtitle {
                font-size: 0.95rem;
            }
            .hero-actions {
                flex-direction: column;
                width: 100%;
                gap: 12px;
            }
            .hero-actions .btn {
                width: 100%;
            }
            .hero-countdown {
                padding: 12px 16px;
                gap: 12px;
            }
            .countdown-item span {
                font-size: 1.2rem;
            }
            .section-header h2 {
                font-size: 1.6rem;
            }
            .section-header p {
                font-size: 0.92rem;
            }
            .service-row-item {
                flex-direction: column;
                gap: 12px;
                padding: 20px 4px;
            }
            .service-number {
                min-width: auto;
            }
            .data-strip {
                gap: 16px;
                padding: 20px 0;
            }
            .data-item {
                min-width: calc(50% - 16px);
                border-right: none;
                border-bottom: 1px solid var(--border-light);
                padding: 12px 8px;
            }
            .data-item:nth-child(even) {
                border-bottom: none;
            }
            .data-item span {
                font-size: 1.6rem;
            }
            .brand-intro {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .brand-intro-image {
                aspect-ratio: 16 / 10;
            }
            .brand-intro-text h2 {
                font-size: 1.5rem;
            }
            .news-list-item {
                flex-wrap: wrap;
                gap: 6px 12px;
                padding: 14px 4px;
            }
            .news-list-item .news-title {
                font-size: 0.9rem;
                flex-basis: 100%;
            }
            .news-recommend {
                padding: 20px;
            }
            .perspective-grid {
                grid-template-columns: 1fr;
            }
            .scene-step {
                flex-direction: column;
                gap: 10px;
            }
            .faq-question {
                padding: 14px 16px;
            }
            .faq-answer {
                padding: 0 16px;
            }
            .faq-item.active .faq-answer {
                padding: 0 16px 16px;
            }
            .contact-form {
                padding: 20px;
            }
            .form-row {
                grid-template-columns: 1fr;
                gap: 0;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
                gap: 12px;
            }
            .footer-bottom-links {
                justify-content: center;
            }
        }

        @media (max-width: 520px) {
            .hero h1 {
                font-size: 1.7rem;
            }
            .hero-tag {
                font-size: 0.75rem;
                padding: 4px 12px;
            }
            .lang-switch button {
                padding: 4px 10px;
                font-size: 0.72rem;
            }
            .header-actions {
                gap: 8px;
            }
            .data-item {
                min-width: 100%;
                border-bottom: 1px solid var(--border-light);
            }
            .data-item:nth-child(even) {
                border-bottom: 1px solid var(--border-light);
            }
            .data-item:last-child {
                border-bottom: none;
            }
            .section-header h2 {
                font-size: 1.4rem;
            }
            .countdown-item {
                min-width: 36px;
            }
            .countdown-item span {
                font-size: 1.1rem;
            }
        }

/* roulang page: category1 */
:root {
            --primary: #6b7d8e;
            --primary-dark: #4e5f6e;
            --primary-light: #8fa3b3;
            --primary-bg: #f3f6f8;
            --accent: #b8a992;
            --accent-light: #d8cdbd;
            --bg: #faf9f7;
            --card-bg: #ffffff;
            --text-primary: #1c1e21;
            --text-secondary: #3d4348;
            --text-muted: #6f767d;
            --text-light: #9aa1a7;
            --border: #e2e6ea;
            --border-light: #edf0f2;
            --footer-bg: #1a1d20;
            --footer-text: #c6ccd1;
            --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.04);
            --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.06);
            --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.08);
            --radius-sm: 6px;
            --radius-md: 12px;
            --radius-lg: 16px;
            --radius-full: 999px;
            --font-sans: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", "Source Han Sans SC", "System UI", -apple-system, "Segoe UI", Roboto, sans-serif;
            --transition: all 0.25s cubic-bezier(0.25, 0.46, 0.45, 0.94);
            --transition-slow: all 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
            --container-max: 1240px;
            --header-height: 68px;
            --section-gap: 72px;
            --section-gap-mobile: 56px;
        }

        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }

        body {
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.75;
            color: var(--text-secondary);
            background-color: var(--bg);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            overflow-x: hidden;
        }

        a {
            color: var(--text-primary);
            text-decoration: none;
            transition: var(--transition);
        }

        a:hover {
            color: var(--primary);
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
        }

        button,
        input,
        select,
        textarea {
            font-family: inherit;
            font-size: inherit;
            line-height: inherit;
            border: none;
            background: none;
        }

        button {
            cursor: pointer;
        }

        .container {
            max-width: var(--container-max);
            margin: 0 auto;
            padding: 0 24px;
        }

        /* Header / Nav */
        .header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            height: var(--header-height);
            background-color: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--border-light);
            transition: var(--transition);
        }

        .header.scrolled {
            box-shadow: var(--shadow-sm);
            border-bottom-color: var(--border);
        }

        .header-inner {
            max-width: var(--container-max);
            margin: 0 auto;
            padding: 0 24px;
            height: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 24px;
        }

        .logo {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            font-size: 1.3rem;
            font-weight: 600;
            letter-spacing: 0.06em;
            color: var(--text-primary);
            white-space: nowrap;
            flex-shrink: 0;
        }

        .logo:hover {
            color: var(--primary-dark);
        }

        .logo-mark {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 34px;
            height: 34px;
            border-radius: 50%;
            background-color: var(--text-primary);
            color: #fff;
            font-size: 0.95rem;
            font-weight: 500;
            letter-spacing: 0;
            flex-shrink: 0;
        }

        .nav {
            display: flex;
            align-items: center;
            gap: 20px;
            flex: 1;
            justify-content: flex-end;
        }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 28px;
        }

        .nav-links a {
            font-size: 0.92rem;
            font-weight: 500;
            letter-spacing: 0.03em;
            color: var(--text-secondary);
            padding: 4px 0;
            position: relative;
            white-space: nowrap;
            transition: var(--transition);
        }

        .nav-links a::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 0;
            right: 0;
            height: 1.5px;
            background-color: var(--primary);
            transform: scaleX(0);
            transform-origin: left center;
            transition: var(--transition);
        }

        .nav-links a:hover {
            color: var(--primary-dark);
        }

        .nav-links a:hover::after {
            transform: scaleX(1);
        }

        .nav-links a.active {
            color: var(--primary-dark);
            font-weight: 600;
        }

        .nav-links a.active::after {
            transform: scaleX(1);
            background-color: var(--accent);
        }

        .header-actions {
            display: flex;
            align-items: center;
            gap: 12px;
            flex-shrink: 0;
        }

        .lang-switch {
            display: flex;
            align-items: center;
            background-color: var(--primary-bg);
            border-radius: var(--radius-full);
            padding: 3px;
            border: 1px solid var(--border-light);
        }

        .lang-switch button {
            padding: 6px 14px;
            font-size: 0.82rem;
            font-weight: 500;
            color: var(--text-muted);
            border-radius: var(--radius-full);
            transition: var(--transition);
            letter-spacing: 0.04em;
        }

        .lang-switch button:hover {
            color: var(--text-primary);
        }

        .lang-switch button.active {
            background-color: var(--text-primary);
            color: #fff;
        }

        .nav-cta {
            height: 38px;
            padding: 0 18px;
            font-size: 0.85rem;
        }

        .hamburger {
            display: none;
            flex-direction: column;
            gap: 5px;
            padding: 8px;
            margin-left: auto;
        }

        .hamburger span {
            display: block;
            width: 22px;
            height: 1.5px;
            background-color: var(--text-primary);
            transition: var(--transition);
        }

        /* Hero */
        .hero {
            padding-top: calc(var(--header-height) + 72px);
            padding-bottom: 72px;
            background: linear-gradient(165deg, var(--primary-bg) 0%, var(--bg) 55%, #f0f2f3 100%);
            position: relative;
            overflow: hidden;
        }

        .hero::before {
            content: '';
            position: absolute;
            top: 0;
            right: 0;
            width: 45%;
            height: 100%;
            background-image: url('/assets/images/backpic/back-1.webp');
            background-size: cover;
            background-position: center;
            opacity: 0.12;
            pointer-events: none;
        }

        .hero-inner {
            position: relative;
            z-index: 1;
            display: grid;
            grid-template-columns: 1fr 0.85fr;
            gap: 48px;
            align-items: center;
        }

        .hero-content {
            max-width: 620px;
        }

        .hero-tag {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 0.82rem;
            font-weight: 500;
            letter-spacing: 0.1em;
            text-transform: uppercase;
            color: var(--primary);
            background-color: rgba(255, 255, 255, 0.7);
            border: 1px solid var(--border);
            padding: 8px 16px;
            border-radius: var(--radius-full);
            margin-bottom: 24px;
        }

        .hero-tag::before {
            content: '';
            width: 6px;
            height: 6px;
            border-radius: 50%;
            background-color: var(--accent);
        }

        .hero h1 {
            font-size: 3rem;
            font-weight: 500;
            color: var(--text-primary);
            letter-spacing: 0.04em;
            line-height: 1.25;
            margin-bottom: 20px;
        }

        .hero-subtitle {
            font-size: 1.1rem;
            color: var(--text-muted);
            line-height: 1.8;
            max-width: 520px;
            margin-bottom: 32px;
        }

        .hero-actions {
            display: flex;
            gap: 14px;
            flex-wrap: wrap;
        }

        .hero-visual {
            position: relative;
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-lg);
            aspect-ratio: 4 / 5;
            max-width: 420px;
            justify-self: end;
        }

        .hero-visual img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }

        .hero-visual::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(to top, rgba(0, 0, 0, 0.35) 0%, transparent 45%);
            pointer-events: none;
        }

        .hero-visual-label {
            position: absolute;
            bottom: 20px;
            left: 20px;
            z-index: 2;
            color: #fff;
            font-size: 0.88rem;
            font-weight: 500;
            letter-spacing: 0.06em;
            text-shadow: 0 1px 4px rgba(0, 0, 0, 0.3);
        }

        /* Section Common */
        .section {
            padding: var(--section-gap) 0;
        }

        .section--tight {
            padding: 48px 0;
        }

        .section--bg-light {
            background-color: var(--primary-bg);
        }

        .section--bg-white {
            background-color: var(--card-bg);
        }

        .section-header {
            margin-bottom: 44px;
        }

        .section-header h2 {
            font-size: 2rem;
            font-weight: 500;
            color: var(--text-primary);
            letter-spacing: 0.03em;
            line-height: 1.3;
            margin-bottom: 14px;
        }

        .section-header p {
            font-size: 1.02rem;
            color: var(--text-muted);
            max-width: 680px;
            line-height: 1.8;
        }

        .section-tag {
            display: inline-block;
            font-size: 0.82rem;
            color: var(--primary);
            letter-spacing: 0.1em;
            text-transform: uppercase;
            margin-bottom: 10px;
            font-weight: 500;
        }

        /* Buttons */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 0 24px;
            height: 48px;
            border-radius: var(--radius-sm);
            font-size: 0.95rem;
            font-weight: 500;
            letter-spacing: 0.03em;
            transition: var(--transition);
            white-space: nowrap;
            line-height: 1;
            gap: 8px;
        }

        .btn-primary {
            background-color: var(--text-primary);
            color: #fff;
            box-shadow: var(--shadow-sm);
        }

        .btn-primary:hover {
            background-color: var(--primary-dark);
            color: #fff;
            box-shadow: var(--shadow-md);
            transform: translateY(-1px);
        }

        .btn-primary:active {
            transform: translateY(0);
            box-shadow: var(--shadow-sm);
        }

        .btn-primary:focus-visible {
            outline: 3px solid rgba(107, 125, 142, 0.35);
            outline-offset: 2px;
        }

        .btn-secondary {
            background-color: transparent;
            color: var(--text-primary);
            border: 1px solid var(--border);
        }

        .btn-secondary:hover {
            background-color: var(--primary-bg);
            border-color: var(--primary-light);
            color: var(--primary-dark);
        }

        .btn-secondary:active {
            background-color: var(--border-light);
        }

        .btn-secondary:focus-visible {
            outline: 3px solid rgba(107, 125, 142, 0.35);
            outline-offset: 2px;
        }

        .btn-small {
            height: 40px;
            padding: 0 18px;
            font-size: 0.88rem;
        }

        .text-link {
            color: var(--text-primary);
            font-weight: 500;
            border-bottom: 1px solid var(--accent-light);
            padding-bottom: 2px;
            transition: var(--transition);
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }

        .text-link:hover {
            color: var(--primary-dark);
            border-bottom-color: var(--primary);
        }

        /* Category1: 图文交错列表 */
        .interleave-list {
            display: flex;
            flex-direction: column;
            gap: 48px;
        }

        .interleave-item {
            display: grid;
            grid-template-columns: 1fr 0.8fr;
            gap: 40px;
            align-items: center;
            background-color: var(--card-bg);
            border-radius: var(--radius-lg);
            border: 1px solid var(--border-light);
            padding: 36px;
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
        }

        .interleave-item:hover {
            box-shadow: var(--shadow-md);
            border-color: var(--border);
            transform: translateY(-2px);
        }

        .interleave-item:nth-child(even) {
            grid-template-columns: 0.8fr 1fr;
        }

        .interleave-item:nth-child(even) .interleave-image {
            order: -1;
        }

        .interleave-content h3 {
            font-size: 1.4rem;
            font-weight: 500;
            color: var(--text-primary);
            letter-spacing: 0.03em;
            margin-bottom: 12px;
            line-height: 1.35;
        }

        .interleave-content p {
            font-size: 0.98rem;
            color: var(--text-muted);
            line-height: 1.8;
            margin-bottom: 18px;
        }

        .interleave-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
            margin-bottom: 18px;
        }

        .interleave-tag {
            font-size: 0.78rem;
            color: var(--primary);
            background-color: var(--primary-bg);
            padding: 5px 12px;
            border-radius: var(--radius-full);
            letter-spacing: 0.04em;
            font-weight: 500;
        }

        .interleave-image {
            border-radius: var(--radius-md);
            overflow: hidden;
            aspect-ratio: 4 / 3;
            box-shadow: var(--shadow-sm);
        }

        .interleave-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: var(--transition-slow);
        }

        .interleave-item:hover .interleave-image img {
            transform: scale(1.03);
        }

        /* 数据条 */
        .data-strip {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 0;
            background-color: var(--card-bg);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-sm);
            overflow: hidden;
        }

        .data-strip-item {
            padding: 32px 28px;
            text-align: center;
            border-right: 1px solid var(--border-light);
            transition: var(--transition);
        }

        .data-strip-item:last-child {
            border-right: none;
        }

        .data-strip-item:hover {
            background-color: var(--primary-bg);
        }

        .data-strip-number {
            font-size: 2.4rem;
            font-weight: 500;
            color: var(--text-primary);
            letter-spacing: 0.02em;
            line-height: 1.2;
            margin-bottom: 8px;
            font-variant-numeric: tabular-nums;
        }

        .data-strip-label {
            font-size: 0.88rem;
            color: var(--text-muted);
            letter-spacing: 0.05em;
            font-weight: 400;
        }

        /* 业务范围卡片 */
        .biz-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

        .biz-card {
            background-color: var(--card-bg);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-md);
            padding: 28px;
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
            display: flex;
            flex-direction: column;
        }

        .biz-card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-2px);
            border-color: var(--border);
        }

        .biz-card-icon {
            width: 44px;
            height: 44px;
            border-radius: 50%;
            background-color: var(--primary-bg);
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 18px;
            flex-shrink: 0;
        }

        .biz-card-icon svg {
            width: 20px;
            height: 20px;
            stroke: var(--primary);
            fill: none;
            stroke-width: 1.6;
        }

        .biz-card h3 {
            font-size: 1.1rem;
            font-weight: 500;
            color: var(--text-primary);
            letter-spacing: 0.03em;
            margin-bottom: 10px;
            line-height: 1.4;
        }

        .biz-card p {
            font-size: 0.92rem;
            color: var(--text-muted);
            line-height: 1.75;
            flex: 1;
        }

        /* 流程步骤 */
        .process-list {
            display: flex;
            flex-direction: column;
            gap: 0;
            counter-reset: step;
        }

        .process-item {
            display: flex;
            gap: 24px;
            padding: 24px 0;
            border-bottom: 1px solid var(--border-light);
            counter-increment: step;
        }

        .process-item:last-child {
            border-bottom: none;
        }

        .process-number {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background-color: var(--primary-bg);
            color: var(--primary-dark);
            font-size: 1rem;
            font-weight: 500;
            flex-shrink: 0;
            border: 1px solid var(--border-light);
            letter-spacing: 0;
        }

        .process-item h3 {
            font-size: 1.05rem;
            font-weight: 500;
            color: var(--text-primary);
            letter-spacing: 0.03em;
            margin-bottom: 8px;
        }

        .process-item p {
            font-size: 0.92rem;
            color: var(--text-muted);
            line-height: 1.75;
        }

        /* FAQ */
        .faq-list {
            display: flex;
            flex-direction: column;
            gap: 0;
            border-top: 1px solid var(--border-light);
        }

        .faq-item {
            border-bottom: 1px solid var(--border-light);
            transition: var(--transition);
        }

        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            padding: 20px 0;
            cursor: pointer;
            transition: var(--transition);
            text-align: left;
            width: 100%;
        }

        .faq-question span {
            font-size: 1rem;
            font-weight: 500;
            color: var(--text-primary);
            letter-spacing: 0.02em;
            line-height: 1.5;
            flex: 1;
        }

        .faq-question .faq-icon {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 28px;
            height: 28px;
            flex-shrink: 0;
            position: relative;
        }

        .faq-question .faq-icon::before,
        .faq-question .faq-icon::after {
            content: '';
            position: absolute;
            background-color: var(--text-muted);
            transition: var(--transition);
        }

        .faq-question .faq-icon::before {
            width: 14px;
            height: 1.5px;
        }

        .faq-question .faq-icon::after {
            width: 1.5px;
            height: 14px;
        }

        .faq-item.expanded .faq-icon::after {
            transform: rotate(90deg);
            opacity: 0;
        }

        .faq-item.expanded .faq-question {
            padding-bottom: 12px;
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s cubic-bezier(0.25, 0.46, 0.45, 0.94), padding 0.3s ease, background-color 0.3s ease;
            background-color: transparent;
            border-radius: 0 0 var(--radius-sm) var(--radius-sm);
        }

        .faq-item.expanded .faq-answer {
            max-height: 400px;
            padding: 4px 0 20px;
            background-color: transparent;
        }

        .faq-answer p {
            font-size: 0.94rem;
            color: var(--text-muted);
            line-height: 1.8;
            max-width: 680px;
        }

        /* CTA */
        .cta-section {
            padding: 64px 0;
            background-color: var(--footer-bg);
            border-radius: 0;
        }

        .cta-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 40px;
            flex-wrap: wrap;
        }

        .cta-inner h2 {
            font-size: 1.8rem;
            font-weight: 500;
            color: #fff;
            letter-spacing: 0.03em;
            line-height: 1.35;
            max-width: 520px;
            margin-bottom: 10px;
        }

        .cta-inner p {
            font-size: 1rem;
            color: var(--footer-text);
            line-height: 1.7;
            max-width: 480px;
        }

        .cta-inner .btn {
            background-color: #fff;
            color: var(--text-primary);
        }

        .cta-inner .btn:hover {
            background-color: var(--primary-bg);
            color: var(--primary-dark);
        }

        /* Footer */
        .footer {
            background-color: var(--footer-bg);
            color: var(--footer-text);
            padding: 56px 0 0;
            font-size: 0.9rem;
            line-height: 1.7;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.4fr 1fr 1fr 0.8fr;
            gap: 40px;
            padding-bottom: 40px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        }

        .footer-brand .logo {
            color: #fff;
            margin-bottom: 16px;
            display: inline-flex;
        }

        .footer-brand .logo:hover {
            color: var(--footer-text);
        }

        .footer-brand .logo-mark {
            background-color: #fff;
            color: var(--text-primary);
        }

        .footer-brand p {
            font-size: 0.88rem;
            color: var(--footer-text);
            line-height: 1.8;
            max-width: 340px;
        }

        .footer-col h4 {
            font-size: 0.9rem;
            font-weight: 500;
            color: #fff;
            letter-spacing: 0.06em;
            margin-bottom: 16px;
        }

        .footer-col a {
            display: block;
            font-size: 0.88rem;
            color: var(--footer-text);
            padding: 5px 0;
            transition: var(--transition);
        }

        .footer-col a:hover {
            color: #fff;
        }

        .footer-bottom {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
            gap: 12px;
            padding: 24px 0;
            font-size: 0.8rem;
            color: var(--text-light);
        }

        .footer-bottom p {
            margin: 0;
        }

        .footer-bottom-links {
            display: flex;
            gap: 16px;
            align-items: center;
        }

        .footer-bottom-links a {
            color: var(--text-light);
            font-size: 0.8rem;
            transition: var(--transition);
        }

        .footer-bottom-links a:hover {
            color: #fff;
        }

        /* Responsive */
        @media (max-width: 1024px) {
            .hero-inner {
                grid-template-columns: 1fr;
                gap: 32px;
            }

            .hero-visual {
                max-width: 100%;
                aspect-ratio: 16 / 7;
                justify-self: start;
                width: 100%;
            }

            .interleave-item,
            .interleave-item:nth-child(even) {
                grid-template-columns: 1fr;
                gap: 24px;
                padding: 28px;
            }

            .interleave-item:nth-child(even) .interleave-image {
                order: 0;
            }

            .data-strip {
                grid-template-columns: repeat(2, 1fr);
            }

            .data-strip-item:nth-child(2) {
                border-right: none;
            }

            .data-strip-item:nth-child(1),
            .data-strip-item:nth-child(2) {
                border-bottom: 1px solid var(--border-light);
            }

            .biz-grid {
                grid-template-columns: repeat(2, 1fr);
            }

            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
        }

        @media (max-width: 768px) {
            :root {
                --header-height: 60px;
                --section-gap: 48px;
            }

            .header-inner {
                padding: 0 16px;
            }

            .nav-links {
                position: fixed;
                top: var(--header-height);
                left: 0;
                right: 0;
                bottom: 0;
                flex-direction: column;
                align-items: flex-start;
                gap: 0;
                background-color: #fff;
                padding: 24px 20px;
                transform: translateX(100%);
                transition: transform 0.35s cubic-bezier(0.25, 0.46, 0.45, 0.94);
                z-index: 999;
                overflow-y: auto;
                border-top: 1px solid var(--border-light);
            }

            .nav-links.open {
                transform: translateX(0);
            }

            .nav-links a {
                display: block;
                font-size: 1.05rem;
                padding: 14px 0;
                width: 100%;
                border-bottom: 1px solid var(--border-light);
            }

            .nav-links a::after {
                display: none;
            }

            .hamburger {
                display: flex;
            }

            .header-actions .lang-switch {
                display: none;
            }

            .header-actions .nav-cta {
                display: none;
            }

            .hero {
                padding-top: calc(var(--header-height) + 40px);
                padding-bottom: 48px;
            }

            .hero h1 {
                font-size: 2.2rem;
            }

            .hero-subtitle {
                font-size: 1rem;
            }

            .section-header h2 {
                font-size: 1.65rem;
            }

            .data-strip {
                grid-template-columns: 1fr;
            }

            .data-strip-item {
                border-right: none;
                border-bottom: 1px solid var(--border-light);
                padding: 24px;
            }

            .data-strip-item:last-child {
                border-bottom: none;
            }

            .data-strip-item:nth-child(2) {
                border-right: none;
                border-bottom: 1px solid var(--border-light);
            }

            .biz-grid {
                grid-template-columns: 1fr;
            }

            .cta-inner {
                flex-direction: column;
                align-items: flex-start;
                gap: 24px;
            }

            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }

            .footer-bottom {
                flex-direction: column;
                align-items: flex-start;
                gap: 8px;
            }
        }

        @media (max-width: 520px) {
            .container {
                padding: 0 16px;
            }

            .hero h1 {
                font-size: 1.85rem;
            }

            .hero-visual {
                aspect-ratio: 16 / 9;
            }

            .interleave-item {
                padding: 20px;
            }

            .section-header h2 {
                font-size: 1.45rem;
            }

            .btn {
                height: 46px;
                font-size: 0.9rem;
            }
        }

/* roulang page: category2 */
:root {
            --primary: #6b7d8e;
            --primary-dark: #4e5f6e;
            --primary-light: #8fa3b3;
            --primary-bg: #f3f6f8;
            --accent: #b8a992;
            --accent-light: #d8cdbd;
            --bg: #faf9f7;
            --card-bg: #ffffff;
            --text-primary: #1c1e21;
            --text-secondary: #3d4348;
            --text-muted: #6f767d;
            --text-light: #9aa1a7;
            --border: #e2e6ea;
            --border-light: #edf0f2;
            --footer-bg: #1a1d20;
            --footer-text: #c6ccd1;
            --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.04);
            --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.06);
            --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.08);
            --radius-sm: 6px;
            --radius-md: 12px;
            --radius-lg: 16px;
            --radius-full: 999px;
            --font-sans: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", "Source Han Sans SC", "System UI", -apple-system, "Segoe UI", Roboto, sans-serif;
            --transition: all 0.25s cubic-bezier(0.25, 0.46, 0.45, 0.94);
            --transition-slow: all 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
            --container-max: 1240px;
            --header-height: 68px;
            --section-gap: 72px;
            --section-gap-mobile: 56px;
        }

        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }

        body {
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.75;
            color: var(--text-secondary);
            background-color: var(--bg);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            overflow-x: hidden;
        }

        a {
            color: var(--text-primary);
            text-decoration: none;
            transition: var(--transition);
        }

        a:hover {
            color: var(--primary);
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
        }

        button,
        input,
        select,
        textarea {
            font-family: inherit;
            font-size: inherit;
            line-height: inherit;
        }

        button {
            cursor: pointer;
            border: none;
            background: none;
        }

        .container {
            max-width: var(--container-max);
            margin: 0 auto;
            padding: 0 24px;
        }

        .section {
            padding: var(--section-gap) 0;
        }

        .section--tight {
            padding: 56px 0;
        }

        .section--bg-light {
            background-color: var(--primary-bg);
        }

        .section--bg-white {
            background-color: var(--card-bg);
        }

        .section-header {
            margin-bottom: 44px;
        }

        .section-header h2 {
            font-size: 2.05rem;
            font-weight: 500;
            color: var(--text-primary);
            letter-spacing: 0.03em;
            line-height: 1.3;
            margin-bottom: 14px;
        }

        .section-header p {
            font-size: 1.03rem;
            color: var(--text-muted);
            max-width: 660px;
            line-height: 1.8;
        }

        .section-tag {
            display: inline-block;
            font-size: 0.82rem;
            color: var(--primary);
            letter-spacing: 0.08em;
            text-transform: uppercase;
            margin-bottom: 10px;
            font-weight: 500;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 0 24px;
            height: 48px;
            border-radius: var(--radius-sm);
            font-size: 0.95rem;
            font-weight: 500;
            letter-spacing: 0.03em;
            transition: var(--transition);
            white-space: nowrap;
            line-height: 1;
            gap: 8px;
        }

        .btn-primary {
            background-color: var(--text-primary);
            color: #fff;
            box-shadow: var(--shadow-sm);
        }

        .btn-primary:hover {
            background-color: var(--primary-dark);
            color: #fff;
            box-shadow: var(--shadow-md);
            transform: translateY(-1px);
        }

        .btn-primary:active {
            transform: translateY(0);
            box-shadow: var(--shadow-sm);
        }

        .btn-primary:focus-visible {
            outline: 3px solid rgba(107, 125, 142, 0.35);
            outline-offset: 2px;
        }

        .btn-secondary {
            background-color: transparent;
            color: var(--text-primary);
            border: 1px solid var(--border);
        }

        .btn-secondary:hover {
            background-color: var(--primary-bg);
            border-color: var(--primary-light);
            color: var(--primary-dark);
            transform: translateY(-1px);
        }

        .btn-secondary:active {
            background-color: var(--border-light);
            transform: translateY(0);
        }

        .btn-secondary:focus-visible {
            outline: 3px solid rgba(107, 125, 142, 0.35);
            outline-offset: 2px;
        }

        .btn-small {
            height: 40px;
            padding: 0 18px;
            font-size: 0.88rem;
        }

        .text-link {
            color: var(--text-primary);
            font-weight: 500;
            border-bottom: 1px solid var(--accent-light);
            padding-bottom: 2px;
            transition: var(--transition);
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }

        .text-link:hover {
            color: var(--primary);
            border-bottom-color: var(--primary);
        }

        .visually-hidden {
            position: absolute;
            width: 1px;
            height: 1px;
            margin: -1px;
            padding: 0;
            overflow: hidden;
            clip: rect(0, 0, 0, 0);
            white-space: nowrap;
            border: 0;
        }

        /* Header / Navigation */
        .header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            background-color: rgba(250, 249, 247, 0.92);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--border-light);
            height: var(--header-height);
            transition: var(--transition);
        }

        .header.scrolled {
            box-shadow: var(--shadow-sm);
            background-color: rgba(255, 255, 255, 0.96);
        }

        .header-inner {
            max-width: var(--container-max);
            margin: 0 auto;
            padding: 0 24px;
            height: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 24px;
        }

        .logo {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            font-size: 1.25rem;
            font-weight: 600;
            color: var(--text-primary);
            letter-spacing: 0.04em;
            flex-shrink: 0;
        }

        .logo:hover {
            color: var(--primary);
        }

        .logo-mark {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 36px;
            height: 36px;
            border-radius: var(--radius-sm);
            background-color: var(--text-primary);
            color: #fff;
            font-size: 1rem;
            font-weight: 500;
            letter-spacing: 0;
            transition: var(--transition);
        }

        .logo:hover .logo-mark {
            background-color: var(--primary);
        }

        .nav {
            display: flex;
            align-items: center;
            gap: 28px;
            flex: 1;
            justify-content: space-between;
        }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 22px;
            flex-wrap: wrap;
        }

        .nav-links a {
            font-size: 0.93rem;
            font-weight: 450;
            color: var(--text-secondary);
            letter-spacing: 0.02em;
            padding: 6px 0;
            position: relative;
            transition: var(--transition);
        }

        .nav-links a::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 2px;
            background-color: var(--primary);
            border-radius: 2px;
            transition: width 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
        }

        .nav-links a:hover::after,
        .nav-links a.active::after {
            width: 100%;
        }

        .nav-links a:hover {
            color: var(--primary);
        }

        .nav-links a.active {
            color: var(--primary);
            font-weight: 500;
        }

        .header-actions {
            display: flex;
            align-items: center;
            gap: 14px;
            flex-shrink: 0;
        }

        .lang-switch {
            display: flex;
            align-items: center;
            gap: 2px;
            background-color: var(--border-light);
            border-radius: var(--radius-full);
            padding: 3px;
            border: 1px solid var(--border);
        }

        .lang-switch button {
            padding: 6px 14px;
            border-radius: var(--radius-full);
            font-size: 0.8rem;
            font-weight: 500;
            color: var(--text-muted);
            transition: var(--transition);
            letter-spacing: 0.03em;
        }

        .lang-switch button:hover {
            color: var(--text-primary);
        }

        .lang-switch button.active {
            background-color: var(--text-primary);
            color: #fff;
            box-shadow: var(--shadow-sm);
        }

        .hamburger {
            display: none;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            gap: 5px;
            width: 44px;
            height: 44px;
            border-radius: var(--radius-sm);
            border: 1px solid var(--border);
            background-color: var(--card-bg);
            transition: var(--transition);
        }

        .hamburger:hover {
            border-color: var(--primary-light);
            background-color: var(--primary-bg);
        }

        .hamburger span {
            display: block;
            width: 20px;
            height: 2px;
            background-color: var(--text-primary);
            border-radius: 2px;
            transition: var(--transition);
        }

        .hamburger[aria-expanded="true"] span:nth-child(1) {
            transform: translateY(7px) rotate(45deg);
        }

        .hamburger[aria-expanded="true"] span:nth-child(2) {
            opacity: 0;
            transform: scaleX(0);
        }

        .hamburger[aria-expanded="true"] span:nth-child(3) {
            transform: translateY(-7px) rotate(-45deg);
        }

        .mobile-menu {
            display: none;
            position: fixed;
            top: var(--header-height);
            left: 0;
            right: 0;
            bottom: 0;
            background-color: var(--bg);
            z-index: 999;
            padding: 24px;
            overflow-y: auto;
            transform: translateX(100%);
            transition: transform 0.35s cubic-bezier(0.25, 0.46, 0.45, 0.94);
        }

        .mobile-menu.open {
            transform: translateX(0);
        }

        .mobile-menu .mobile-links {
            display: flex;
            flex-direction: column;
            gap: 6px;
            margin-top: 20px;
        }

        .mobile-menu .mobile-links a {
            padding: 14px 0;
            font-size: 1.05rem;
            font-weight: 500;
            color: var(--text-primary);
            border-bottom: 1px solid var(--border-light);
            display: flex;
            align-items: center;
            justify-content: space-between;
        }

        .mobile-menu .mobile-links a.active {
            color: var(--primary);
        }

        .mobile-menu .mobile-bottom {
            margin-top: 32px;
            display: flex;
            flex-direction: column;
            gap: 16px;
        }

        .mobile-menu .lang-switch {
            align-self: flex-start;
        }

        /* Hero Section */
        .hero {
            padding: calc(var(--header-height) + 60px) 0 70px;
            position: relative;
            overflow: hidden;
            min-height: 620px;
            display: flex;
            align-items: center;
            background-color: var(--bg);
        }

        .hero::before {
            content: '';
            position: absolute;
            top: 0;
            right: 0;
            width: 100%;
            height: 100%;
            background: linear-gradient(105deg, rgba(250, 249, 247, 0.96) 0%, rgba(250, 249, 247, 0.88) 40%, rgba(243, 246, 248, 0.72) 65%, rgba(243, 246, 248, 0.45) 100%);
            z-index: 2;
            pointer-events: none;
        }

        .hero-bg {
            position: absolute;
            top: 0;
            right: 0;
            width: 58%;
            height: 100%;
            object-fit: cover;
            object-position: center;
            z-index: 1;
        }

        .hero .container {
            position: relative;
            z-index: 3;
            display: grid;
            grid-template-columns: 1fr 0.9fr;
            gap: 48px;
            align-items: center;
        }

        .hero h1 {
            font-size: 3rem;
            font-weight: 500;
            color: var(--text-primary);
            letter-spacing: 0.04em;
            line-height: 1.25;
            margin-bottom: 20px;
        }

        .hero-subtitle {
            font-size: 1.15rem;
            color: var(--text-muted);
            line-height: 1.85;
            max-width: 560px;
            margin-bottom: 30px;
        }

        .hero-actions {
            display: flex;
            gap: 14px;
            flex-wrap: wrap;
            margin-bottom: 36px;
        }

        .hero-snapshot {
            display: flex;
            gap: 36px;
            flex-wrap: wrap;
            border-top: 1px solid var(--border);
            padding-top: 22px;
        }

        .hero-snapshot-item {
            display: flex;
            flex-direction: column;
            gap: 2px;
        }

        .hero-snapshot-item .num {
            font-size: 1.5rem;
            font-weight: 600;
            color: var(--text-primary);
            letter-spacing: 0.02em;
            font-variant-numeric: tabular-nums;
        }

        .hero-snapshot-item .label {
            font-size: 0.83rem;
            color: var(--text-muted);
            letter-spacing: 0.03em;
        }

        .hero-panel {
            background-color: rgba(255, 255, 255, 0.75);
            backdrop-filter: blur(8px);
            border-radius: var(--radius-lg);
            border: 1px solid var(--border);
            padding: 28px 30px;
            box-shadow: var(--shadow-md);
            display: flex;
            flex-direction: column;
            gap: 18px;
        }

        .hero-panel-item {
            display: flex;
            align-items: flex-start;
            gap: 14px;
        }

        .hero-panel-icon {
            flex-shrink: 0;
            width: 38px;
            height: 38px;
            border-radius: var(--radius-sm);
            background-color: var(--primary-bg);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1rem;
            font-weight: 600;
            color: var(--primary);
        }

        .hero-panel-item h4 {
            font-size: 0.95rem;
            font-weight: 600;
            color: var(--text-primary);
            margin-bottom: 3px;
            letter-spacing: 0.02em;
        }

        .hero-panel-item p {
            font-size: 0.85rem;
            color: var(--text-muted);
            line-height: 1.6;
        }

        /* Horizontal Gallery */
        .gallery-section {
            background-color: var(--card-bg);
            border-top: 1px solid var(--border-light);
            border-bottom: 1px solid var(--border-light);
        }

        .gallery-scroll {
            display: flex;
            gap: 20px;
            overflow-x: auto;
            padding: 8px 4px 24px;
            scroll-snap-type: x mandatory;
            -webkit-overflow-scrolling: touch;
            scrollbar-width: thin;
            scrollbar-color: var(--primary-light) var(--border-light);
        }

        .gallery-scroll::-webkit-scrollbar {
            height: 6px;
        }

        .gallery-scroll::-webkit-scrollbar-track {
            background: var(--border-light);
            border-radius: 3px;
        }

        .gallery-scroll::-webkit-scrollbar-thumb {
            background: var(--primary-light);
            border-radius: 3px;
        }

        .gallery-card {
            flex: 0 0 300px;
            scroll-snap-align: start;
            border-radius: var(--radius-md);
            overflow: hidden;
            background-color: var(--card-bg);
            border: 1px solid var(--border);
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
        }

        .gallery-card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-3px);
            border-color: var(--primary-light);
        }

        .gallery-card img {
            width: 100%;
            height: 190px;
            object-fit: cover;
            background-color: var(--primary-bg);
        }

        .gallery-card-body {
            padding: 18px 20px 20px;
        }

        .gallery-card-body h3 {
            font-size: 1.05rem;
            font-weight: 600;
            color: var(--text-primary);
            margin-bottom: 6px;
            letter-spacing: 0.02em;
        }

        .gallery-card-body p {
            font-size: 0.87rem;
            color: var(--text-muted);
            line-height: 1.65;
            margin-bottom: 10px;
        }

        .gallery-card-tag {
            display: inline-block;
            padding: 3px 10px;
            border-radius: var(--radius-full);
            font-size: 0.72rem;
            font-weight: 500;
            color: var(--primary);
            background-color: var(--primary-bg);
            letter-spacing: 0.04em;
        }

        /* Card List Section */
        .list-section {
            background-color: var(--bg);
        }

        .card-list {
            display: flex;
            flex-direction: column;
            gap: 20px;
        }

        .list-item {
            display: grid;
            grid-template-columns: 240px 1fr;
            gap: 28px;
            background-color: var(--card-bg);
            border-radius: var(--radius-md);
            border: 1px solid var(--border);
            padding: 24px 26px;
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
        }

        .list-item:hover {
            box-shadow: var(--shadow-md);
            border-color: var(--primary-light);
            transform: translateY(-2px);
        }

        .list-item-img {
            border-radius: var(--radius-sm);
            overflow: hidden;
            height: 160px;
        }

        .list-item-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            background-color: var(--primary-bg);
            transition: var(--transition-slow);
        }

        .list-item:hover .list-item-img img {
            transform: scale(1.03);
        }

        .list-item-content {
            display: flex;
            flex-direction: column;
            gap: 10px;
            justify-content: center;
        }

        .list-item-content h3 {
            font-size: 1.3rem;
            font-weight: 600;
            color: var(--text-primary);
            letter-spacing: 0.02em;
        }

        .list-item-content p {
            font-size: 0.95rem;
            color: var(--text-muted);
            line-height: 1.75;
        }

        .list-item-meta {
            display: flex;
            gap: 16px;
            flex-wrap: wrap;
        }

        .list-item-meta span {
            font-size: 0.78rem;
            color: var(--text-light);
            letter-spacing: 0.03em;
            display: inline-flex;
            align-items: center;
            gap: 4px;
        }

        .list-item-meta span::before {
            content: '·';
            font-weight: 700;
            color: var(--accent);
        }

        /* Stats Bar */
        .stats-bar {
            background-color: var(--primary-bg);
            border-top: 1px solid var(--border-light);
            border-bottom: 1px solid var(--border-light);
            padding: 48px 0;
        }

        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 32px;
            text-align: center;
        }

        .stat-item {
            padding: 10px 16px;
        }

        .stat-num {
            font-size: 2.4rem;
            font-weight: 500;
            color: var(--text-primary);
            letter-spacing: 0.02em;
            font-variant-numeric: tabular-nums;
            line-height: 1.2;
            margin-bottom: 6px;
        }

        .stat-label {
            font-size: 0.88rem;
            color: var(--text-muted);
            letter-spacing: 0.05em;
        }

        /* Deep Content */
        .deep-content {
            background-color: var(--card-bg);
            border-top: 1px solid var(--border-light);
            border-bottom: 1px solid var(--border-light);
        }

        .deep-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 48px;
            align-items: start;
        }

        .deep-text h2 {
            font-size: 2rem;
            font-weight: 500;
            color: var(--text-primary);
            letter-spacing: 0.03em;
            line-height: 1.3;
            margin-bottom: 18px;
        }

        .deep-text p {
            font-size: 1.02rem;
            color: var(--text-secondary);
            line-height: 1.85;
            margin-bottom: 16px;
        }

        .deep-visual {
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-md);
            border: 1px solid var(--border);
        }

        .deep-visual img {
            width: 100%;
            height: auto;
            object-fit: cover;
            aspect-ratio: 16/10;
            background-color: var(--primary-bg);
        }

        /* FAQ */
        .faq-section {
            background-color: var(--bg);
        }

        .faq-list {
            max-width: 820px;
            margin: 0 auto;
        }

        .faq-item {
            border: 1px solid var(--border);
            border-radius: var(--radius-sm);
            margin-bottom: 12px;
            background-color: var(--card-bg);
            box-shadow: var(--shadow-sm);
            overflow: hidden;
            transition: var(--transition);
        }

        .faq-item.active {
            border-color: var(--primary-light);
            background-color: var(--primary-bg);
        }

        .faq-question {
            width: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            padding: 18px 22px;
            font-size: 0.98rem;
            font-weight: 600;
            color: var(--text-primary);
            text-align: left;
            letter-spacing: 0.02em;
            transition: var(--transition);
        }

        .faq-question:hover {
            color: var(--primary);
        }

        .faq-icon {
            flex-shrink: 0;
            width: 24px;
            height: 24px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.2rem;
            font-weight: 300;
            color: var(--text-muted);
            transition: transform 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
        }

        .faq-item.active .faq-icon {
            transform: rotate(45deg);
            color: var(--primary);
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
        }

        .faq-item.active .faq-answer {
            max-height: 400px;
        }

        .faq-answer-inner {
            padding: 0 22px 20px;
            font-size: 0.92rem;
            color: var(--text-muted);
            line-height: 1.8;
        }

        /* CTA / Contact */
        .contact-section {
            background-color: var(--primary-bg);
            border-top: 1px solid var(--border-light);
        }

        .contact-grid {
            display: grid;
            grid-template-columns: 1fr 1.1fr;
            gap: 48px;
            align-items: start;
        }

        .contact-info h2 {
            font-size: 2rem;
            font-weight: 500;
            color: var(--text-primary);
            letter-spacing: 0.03em;
            line-height: 1.3;
            margin-bottom: 16px;
        }

        .contact-info p {
            font-size: 1rem;
            color: var(--text-muted);
            line-height: 1.8;
            max-width: 480px;
            margin-bottom: 24px;
        }

        .contact-detail {
            display: flex;
            flex-direction: column;
            gap: 14px;
        }

        .contact-detail-item {
            display: flex;
            align-items: center;
            gap: 12px;
            font-size: 0.92rem;
            color: var(--text-secondary);
        }

        .contact-detail-icon {
            flex-shrink: 0;
            width: 32px;
            height: 32px;
            border-radius: var(--radius-sm);
            background-color: var(--card-bg);
            border: 1px solid var(--border);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 0.85rem;
            color: var(--primary);
        }

        .contact-form {
            background-color: var(--card-bg);
            border-radius: var(--radius-lg);
            border: 1px solid var(--border);
            padding: 32px 34px;
            box-shadow: var(--shadow-md);
        }

        .contact-form label {
            display: block;
            font-size: 0.88rem;
            font-weight: 500;
            color: var(--text-secondary);
            margin-bottom: 6px;
            letter-spacing: 0.02em;
        }

        .contact-form label .required {
            color: var(--primary);
            margin-left: 2px;
        }

        .form-group {
            margin-bottom: 18px;
        }

        .contact-form input,
        .contact-form select,
        .contact-form textarea {
            width: 100%;
            padding: 12px 14px;
            border: 1px solid var(--border);
            border-radius: var(--radius-sm);
            background-color: var(--bg);
            font-size: 0.92rem;
            color: var(--text-primary);
            transition: var(--transition);
            outline: none;
        }

        .contact-form input:focus,
        .contact-form select:focus,
        .contact-form textarea:focus {
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(107, 125, 142, 0.12);
            background-color: #fff;
        }

        .contact-form textarea {
            min-height: 100px;
            resize: vertical;
        }

        .contact-form .btn {
            width: 100%;
            margin-top: 6px;
        }

        /* Footer */
        .footer {
            background-color: var(--footer-bg);
            color: var(--footer-text);
            padding: 56px 0 28px;
            font-size: 0.88rem;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 40px;
        }

        .footer-brand .logo {
            color: #fff;
            margin-bottom: 14px;
            display: inline-flex;
        }

        .footer-brand .logo-mark {
            background-color: var(--primary-light);
            color: #fff;
        }

        .footer-brand p {
            font-size: 0.88rem;
            color: var(--footer-text);
            line-height: 1.75;
            max-width: 340px;
            opacity: 0.85;
        }

        .footer-col h4 {
            font-size: 0.9rem;
            font-weight: 600;
            color: #fff;
            margin-bottom: 14px;
            letter-spacing: 0.04em;
        }

        .footer-col a {
            display: block;
            font-size: 0.86rem;
            color: var(--footer-text);
            padding: 5px 0;
            transition: var(--transition);
            opacity: 0.8;
        }

        .footer-col a:hover {
            color: #fff;
            opacity: 1;
            transform: translateX(3px);
        }

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            padding-top: 22px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 0.78rem;
            color: var(--footer-text);
            opacity: 0.7;
        }

        .footer-bottom-links {
            display: flex;
            gap: 16px;
            flex-wrap: wrap;
        }

        .footer-bottom-links a {
            color: var(--footer-text);
            transition: var(--transition);
        }

        .footer-bottom-links a:hover {
            color: #fff;
        }

        /* Responsive */
        @media (max-width: 1199px) {
            .hero .container {
                grid-template-columns: 1fr;
                gap: 36px;
            }
            .hero {
                min-height: auto;
                padding-top: calc(var(--header-height) + 36px);
                padding-bottom: 50px;
            }
            .hero-bg {
                width: 100%;
                height: 100%;
                opacity: 0.25;
            }
            .hero-panel {
                max-width: 560px;
            }
            .deep-grid {
                grid-template-columns: 1fr;
                gap: 32px;
            }
            .contact-grid {
                grid-template-columns: 1fr;
                gap: 32px;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 28px;
            }
        }

        @media (max-width: 991px) {
            .nav-links {
                display: none;
            }
            .hamburger {
                display: flex;
            }
            .mobile-menu {
                display: block;
            }
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 24px;
            }
            .list-item {
                grid-template-columns: 1fr;
                gap: 18px;
            }
            .list-item-img {
                height: 200px;
            }
        }

        @media (max-width: 767px) {
            :root {
                --section-gap: 48px;
                --section-gap-mobile: 40px;
                --header-height: 60px;
            }
            .container {
                padding: 0 18px;
            }
            .header-inner {
                padding: 0 18px;
                gap: 12px;
            }
            .nav-cta {
                display: none;
            }
            .lang-switch button {
                padding: 5px 10px;
                font-size: 0.72rem;
            }
            .hero {
                padding-top: calc(var(--header-height) + 28px);
                padding-bottom: 40px;
            }
            .hero h1 {
                font-size: 2.1rem;
                letter-spacing: 0.03em;
            }
            .hero-subtitle {
                font-size: 1rem;
                line-height: 1.7;
            }
            .hero-snapshot {
                gap: 20px;
            }
            .hero-snapshot-item .num {
                font-size: 1.25rem;
            }
            .section-header h2 {
                font-size: 1.7rem;
            }
            .section-header p {
                font-size: 0.95rem;
            }
            .gallery-card {
                flex: 0 0 260px;
            }
            .gallery-card img {
                height: 160px;
            }
            .list-item {
                padding: 18px 16px;
            }
            .list-item-content h3 {
                font-size: 1.1rem;
            }
            .stats-grid {
                grid-template-columns: 1fr 1fr;
                gap: 16px;
            }
            .stat-num {
                font-size: 1.8rem;
            }
            .deep-text h2 {
                font-size: 1.6rem;
            }
            .contact-form {
                padding: 24px 20px;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .footer-bottom {
                flex-direction: column;
                align-items: flex-start;
                gap: 8px;
            }
            .footer-bottom-links {
                gap: 12px;
            }
            .btn {
                height: 44px;
                padding: 0 18px;
                font-size: 0.88rem;
            }
            .hero-actions .btn {
                flex: 1;
                min-width: 130px;
            }
        }

        @media (max-width: 520px) {
            .hero h1 {
                font-size: 1.85rem;
            }
            .stats-grid {
                grid-template-columns: 1fr;
                gap: 14px;
            }
            .gallery-card {
                flex: 0 0 240px;
            }
            .gallery-card img {
                height: 140px;
            }
            .contact-detail-item {
                font-size: 0.85rem;
            }
            .contact-form {
                padding: 20px 16px;
            }
        }

/* roulang page: category3 */
:root {
  --primary: #6b7d8e;
  --primary-dark: #4e5f6e;
  --primary-light: #8fa3b3;
  --primary-bg: #f3f6f8;
  --accent: #b8a992;
  --accent-light: #d8cdbd;
  --bg: #faf9f7;
  --card-bg: #ffffff;
  --text-primary: #1c1e21;
  --text-secondary: #3d4348;
  --text-muted: #6f767d;
  --text-light: #9aa1a7;
  --border: #e2e6ea;
  --border-light: #edf0f2;
  --footer-bg: #1a1d20;
  --footer-text: #c6ccd1;
  --shadow-sm: 0 1px 2px rgba(0,0,0,0.04);
  --shadow-md: 0 4px 16px rgba(0,0,0,0.06);
  --shadow-lg: 0 8px 32px rgba(0,0,0,0.08);
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-full: 999px;
  --font-sans: "PingFang SC","Microsoft YaHei","Noto Sans SC","Source Han Sans SC","System UI",-apple-system,"Segoe UI",Roboto,sans-serif;
  --transition: all 0.25s cubic-bezier(0.25,0.46,0.45,0.94);
  --transition-slow: all 0.4s cubic-bezier(0.25,0.46,0.45,0.94);
  --container-max: 1240px;
  --header-height: 68px;
  --section-gap: 96px;
  --section-gap-mobile: 64px;
}
html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}
*,*::before,*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}
body {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.75;
  color: var(--text-secondary);
  background-color: var(--bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}
a {
  color: var(--text-primary);
  text-decoration: none;
  transition: var(--transition);
}
a:hover {
  color: var(--primary);
}
img {
  max-width: 100%;
  height: auto;
  display: block;
}
button,input,select,textarea {
  font-family: inherit;
  font-size: inherit;
  line-height: inherit;
}
button {
  cursor: pointer;
  border: none;
  background: none;
}
.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 24px;
}
.section {
  padding: var(--section-gap) 0;
}
.section--tight {
  padding: 64px 0;
}
.section--bg-light {
  background-color: var(--primary-bg);
}
.section--bg-white {
  background-color: var(--card-bg);
}
.section--bg-dark {
  background-color: #22272c;
  color: var(--footer-text);
}
.section-header {
  margin-bottom: 48px;
}
.section-header h2 {
  font-size: 2.1rem;
  font-weight: 500;
  color: var(--text-primary);
  letter-spacing: 0.03em;
  line-height: 1.3;
  margin-bottom: 16px;
}
.section-header p {
  font-size: 1.05rem;
  color: var(--text-muted);
  max-width: 680px;
  line-height: 1.8;
}
.section-tag {
  display: inline-block;
  font-size: 0.82rem;
  color: var(--primary);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: 12px;
  font-weight: 500;
}
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0 24px;
  height: 48px;
  border-radius: var(--radius-sm);
  font-size: 0.95rem;
  font-weight: 500;
  letter-spacing: 0.03em;
  transition: var(--transition);
  white-space: nowrap;
  line-height: 1;
  gap: 8px;
}
.btn-primary {
  background-color: var(--text-primary);
  color: #fff;
  box-shadow: var(--shadow-sm);
}
.btn-primary:hover {
  background-color: var(--primary-dark);
  color: #fff;
  box-shadow: var(--shadow-md);
  transform: translateY(-1px);
}
.btn-primary:active {
  transform: translateY(0);
  box-shadow: var(--shadow-sm);
}
.btn-primary:focus-visible {
  outline: 3px solid rgba(107,125,142,0.35);
  outline-offset: 2px;
}
.btn-secondary {
  background-color: transparent;
  color: var(--text-primary);
  border: 1px solid var(--border);
}
.btn-secondary:hover {
  background-color: var(--primary-bg);
  border-color: var(--primary-light);
  color: var(--primary-dark);
}
.btn-secondary:active {
  background-color: var(--border-light);
}
.btn-secondary:focus-visible {
  outline: 3px solid rgba(107,125,142,0.35);
  outline-offset: 2px;
}
.btn-small {
  height: 40px;
  padding: 0 18px;
  font-size: 0.88rem;
}
.btn-light {
  background-color: #fff;
  color: var(--text-primary);
  border: 1px solid rgba(255,255,255,0.6);
}
.btn-light:hover {
  background-color: var(--primary-bg);
  color: var(--primary-dark);
}
.text-link {
  color: var(--text-primary);
  font-weight: 500;
  border-bottom: 1px solid var(--accent-light);
  padding-bottom: 2px;
  transition: var(--transition);
  display: inline-flex;
  align-items: center;
  gap: 6px;
}
.text-link:hover {
  color: var(--primary);
  border-bottom-color: var(--primary);
}

/* Header */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(255,255,255,0.96);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border-light);
  transition: var(--transition);
  height: var(--header-height);
}
.header.scrolled {
  box-shadow: var(--shadow-md);
}
.header-inner {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 24px;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}
.logo {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 1.35rem;
  font-weight: 600;
  color: var(--text-primary);
  letter-spacing: 0.05em;
  white-space: nowrap;
  transition: var(--transition);
}
.logo:hover {
  color: var(--primary);
}
.logo-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  background: var(--text-primary);
  color: #fff;
  font-size: 1rem;
  font-weight: 500;
  border-radius: var(--radius-sm);
  letter-spacing: 0;
  transition: var(--transition);
}
.logo:hover .logo-mark {
  background: var(--primary-dark);
}
.nav {
  display: flex;
  align-items: center;
  gap: 32px;
}
.nav-links {
  display: flex;
  align-items: center;
  gap: 26px;
}
.nav-links a {
  font-size: 0.95rem;
  color: var(--text-secondary);
  letter-spacing: 0.02em;
  position: relative;
  padding: 6px 0;
  white-space: nowrap;
}
.nav-links a::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--primary);
  transition: var(--transition);
}
.nav-links a:hover::after,
.nav-links a.active::after {
  width: 100%;
}
.nav-links a:hover {
  color: var(--primary);
}
.nav-links a.active {
  color: var(--primary-dark);
  font-weight: 500;
}
.header-actions {
  display: flex;
  align-items: center;
  gap: 16px;
}
.lang-switch {
  display: inline-flex;
  align-items: center;
  background: var(--primary-bg);
  border-radius: var(--radius-full);
  padding: 4px;
  gap: 2px;
}
.lang-switch button {
  padding: 6px 14px;
  font-size: 0.82rem;
  font-weight: 500;
  color: var(--text-muted);
  border-radius: var(--radius-full);
  transition: var(--transition);
  letter-spacing: 0.03em;
}
.lang-switch button:hover {
  color: var(--text-primary);
}
.lang-switch button.active {
  background: var(--text-primary);
  color: #fff;
  box-shadow: var(--shadow-sm);
}
.nav-cta {
  white-space: nowrap;
}
.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 8px;
  cursor: pointer;
  z-index: 1001;
}
.hamburger span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--text-primary);
  border-radius: 2px;
  transition: var(--transition);
}
.hamburger.open span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}
.hamburger.open span:nth-child(2) {
  opacity: 0;
}
.hamburger.open span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* Hero */
.hero-inner-wrap {
  background-color: #22272c;
  background-image: linear-gradient(135deg, #252c33 0%, #313b44 45%, #1e2429 100%);
  position: relative;
  overflow: hidden;
  padding-top: var(--header-height);
}
.hero-inner-wrap::before {
  content: "";
  position: absolute;
  top: -180px;
  right: -120px;
  width: 560px;
  height: 560px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(184,169,146,0.18) 0%, rgba(184,169,146,0.05) 50%, transparent 70%);
  pointer-events: none;
}
.hero-inner-wrap::after {
  content: "";
  position: absolute;
  bottom: -200px;
  left: -80px;
  width: 400px;
  height: 400px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(107,125,142,0.2) 0%, rgba(107,125,142,0.04) 50%, transparent 70%);
  pointer-events: none;
}
.hero-inner {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 80px 24px 96px;
  display: grid;
  grid-template-columns: 1fr 380px;
  gap: 64px;
  align-items: center;
  position: relative;
  z-index: 1;
}
.hero-breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.85rem;
  color: rgba(255,255,255,0.7);
  margin-bottom: 20px;
  letter-spacing: 0.03em;
}
.hero-breadcrumb a {
  color: rgba(255,255,255,0.7);
  transition: var(--transition);
}
.hero-breadcrumb a:hover {
  color: #fff;
}
.hero-breadcrumb .sep {
  color: rgba(255,255,255,0.4);
}
.hero-inner h1 {
  font-size: 3.2rem;
  font-weight: 500;
  color: #ffffff;
  letter-spacing: 0.04em;
  line-height: 1.25;
  margin-bottom: 24px;
}
.hero-inner h1 .accent-text {
  color: var(--accent-light);
}
.hero-lead {
  font-size: 1.1rem;
  color: rgba(255,255,255,0.82);
  line-height: 1.9;
  max-width: 560px;
  margin-bottom: 36px;
}
.hero-cta-group {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}
.hero-cta-group .btn-light {
  background-color: transparent;
  border-color: rgba(255,255,255,0.4);
  color: #fff;
}
.hero-cta-group .btn-light:hover {
  background-color: rgba(255,255,255,0.1);
  border-color: #fff;
}
.hero-data-panel {
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(255,255,255,0.12);
  border-radius: var(--radius-lg);
  padding: 32px 28px;
  backdrop-filter: blur(8px);
  box-shadow: var(--shadow-lg);
}
.hero-data-panel h3 {
  font-size: 0.85rem;
  font-weight: 500;
  color: rgba(255,255,255,0.6);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: 24px;
}
.hero-data-item {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  padding: 16px 0;
  border-bottom: 1px solid rgba(255,255,255,0.08);
}
.hero-data-item:last-child {
  border-bottom: none;
}
.hero-data-item .data-num {
  font-size: 2rem;
  font-weight: 500;
  color: #fff;
  letter-spacing: 0.02em;
  line-height: 1.1;
}
.hero-data-item .data-num .unit {
  font-size: 1rem;
  color: rgba(255,255,255,0.6);
  font-weight: 400;
  margin-left: 4px;
}
.hero-data-item .data-label {
  font-size: 0.88rem;
  color: rgba(255,255,255,0.7);
  text-align: right;
}

/* Timeline */
.timeline-section {
  position: relative;
}
.timeline-wrap {
  position: relative;
  max-width: 820px;
  margin: 0 auto;
  padding-left: 40px;
}
.timeline-wrap::before {
  content: "";
  position: absolute;
  left: 12px;
  top: 8px;
  bottom: 8px;
  width: 2px;
  background: var(--border);
}
.timeline-item {
  position: relative;
  padding-bottom: 48px;
}
.timeline-item:last-child {
  padding-bottom: 0;
}
.timeline-item::before {
  content: "";
  position: absolute;
  left: -35px;
  top: 6px;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--card-bg);
  border: 3px solid var(--primary-light);
  z-index: 1;
  transition: var(--transition);
}
.timeline-item:hover::before {
  border-color: var(--primary-dark);
  background: var(--primary-bg);
}
.timeline-year {
  display: inline-block;
  font-size: 0.86rem;
  font-weight: 600;
  color: var(--primary);
  letter-spacing: 0.08em;
  margin-bottom: 6px;
}
.timeline-content {
  background: var(--card-bg);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  padding: 24px 28px;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
}
.timeline-content:hover {
  box-shadow: var(--shadow-md);
  border-color: var(--border);
}
.timeline-content h3 {
  font-size: 1.15rem;
  font-weight: 500;
  color: var(--text-primary);
  margin-bottom: 8px;
  letter-spacing: 0.02em;
}
.timeline-content p {
  font-size: 0.95rem;
  color: var(--text-muted);
  line-height: 1.8;
}

/* Feature list */
.feature-list-section {
  background-color: var(--card-bg);
}
.feature-list-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 56px;
  align-items: center;
}
.feature-list-inner {
  display: flex;
  flex-direction: column;
  gap: 0;
}
.feature-list-item {
  display: flex;
  gap: 20px;
  padding: 24px 0;
  border-bottom: 1px solid var(--border-light);
  transition: var(--transition);
}
.feature-list-item:first-child {
  padding-top: 0;
}
.feature-list-item:last-child {
  border-bottom: none;
  padding-bottom: 0;
}
.feature-list-item:hover {
  padding-left: 8px;
}
.feature-num {
  flex-shrink: 0;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--primary-bg);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--primary-dark);
  letter-spacing: 0.05em;
  transition: var(--transition);
}
.feature-list-item:hover .feature-num {
  background: var(--primary);
  color: #fff;
}
.feature-list-body h3 {
  font-size: 1.05rem;
  font-weight: 500;
  color: var(--text-primary);
  margin-bottom: 6px;
  letter-spacing: 0.02em;
}
.feature-list-body p {
  font-size: 0.93rem;
  color: var(--text-muted);
  line-height: 1.75;
}
.feature-list-image {
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-md);
  position: relative;
}
.feature-list-image img {
  width: 100%;
  height: 520px;
  object-fit: cover;
  transition: var(--transition-slow);
}
.feature-list-image:hover img {
  transform: scale(1.03);
}
.feature-list-image .image-badge {
  position: absolute;
  bottom: 24px;
  left: 24px;
  background: rgba(255,255,255,0.9);
  backdrop-filter: blur(8px);
  padding: 10px 18px;
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  color: var(--text-primary);
  font-weight: 500;
  letter-spacing: 0.03em;
}

/* Brand intro */
.brand-intro-section {
  background-color: var(--bg);
  border-top: 1px solid var(--border-light);
  border-bottom: 1px solid var(--border-light);
}
.brand-intro-card {
  background: var(--card-bg);
  border-radius: var(--radius-lg);
  padding: 56px 64px;
  box-shadow: var(--shadow-md);
  border: 1px solid var(--border-light);
  max-width: 900px;
  margin: 0 auto;
}
.brand-intro-card h2 {
  font-size: 1.8rem;
  font-weight: 500;
  color: var(--text-primary);
  margin-bottom: 20px;
  letter-spacing: 0.03em;
}
.brand-intro-card p {
  font-size: 1rem;
  color: var(--text-secondary);
  line-height: 1.9;
  margin-bottom: 16px;
}
.brand-intro-card p:last-child {
  margin-bottom: 0;
}

/* Stats */
.stats-section {
  background-color: #22272c;
  color: var(--footer-text);
  position: relative;
  overflow: hidden;
}
.stats-section::before {
  content: "";
  position: absolute;
  top: -100px;
  right: -60px;
  width: 360px;
  height: 360px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(184,169,146,0.14) 0%, transparent 70%);
  pointer-events: none;
}
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 40px;
  position: relative;
  z-index: 1;
}
.stat-item {
  text-align: center;
  padding: 24px 16px;
  border-right: 1px solid rgba(255,255,255,0.08);
}
.stat-item:last-child {
  border-right: none;
}
.stat-num {
  font-size: 3rem;
  font-weight: 500;
  color: #fff;
  letter-spacing: 0.03em;
  line-height: 1.15;
  margin-bottom: 8px;
}
.stat-num .unit {
  font-size: 1.2rem;
  color: rgba(255,255,255,0.5);
  font-weight: 400;
}
.stat-label {
  font-size: 0.9rem;
  color: rgba(255,255,255,0.65);
  letter-spacing: 0.04em;
}

/* FAQ */
.faq-section {
  background-color: var(--card-bg);
}
.faq-list {
  max-width: 820px;
  margin: 0 auto;
}
.faq-item {
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  margin-bottom: 14px;
  overflow: hidden;
  transition: var(--transition);
  background: var(--bg);
}
.faq-item.active {
  border-color: var(--primary-light);
  box-shadow: var(--shadow-sm);
  background: var(--primary-bg);
}
.faq-question {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  padding: 22px 28px;
  text-align: left;
  background: transparent;
  transition: var(--transition);
  gap: 16px;
}
.faq-question h3 {
  font-size: 1.02rem;
  font-weight: 500;
  color: var(--text-primary);
  letter-spacing: 0.02em;
  line-height: 1.5;
}
.faq-icon {
  flex-shrink: 0;
  width: 24px;
  height: 24px;
  position: relative;
  transition: var(--transition);
}
.faq-icon::before,
.faq-icon::after {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  background: var(--primary);
  transition: var(--transition);
}
.faq-icon::before {
  width: 12px;
  height: 2px;
  transform: translate(-50%, -50%);
}
.faq-icon::after {
  width: 2px;
  height: 12px;
  transform: translate(-50%, -50%);
}
.faq-item.active .faq-icon::after {
  transform: translate(-50%, -50%) rotate(90deg);
  opacity: 0;
}
.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s ease, padding 0.35s ease;
  padding: 0 28px;
}
.faq-item.active .faq-answer {
  max-height: 400px;
  padding: 0 28px 24px;
}
.faq-answer p {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.85;
}

/* CTA */
.cta-section {
  background-color: var(--primary-bg);
}
.cta-card {
  background: var(--card-bg);
  border-radius: var(--radius-lg);
  padding: 64px 56px;
  text-align: center;
  box-shadow: var(--shadow-md);
  border: 1px solid var(--border-light);
  max-width: 800px;
  margin: 0 auto;
}
.cta-card h2 {
  font-size: 2rem;
  font-weight: 500;
  color: var(--text-primary);
  margin-bottom: 16px;
  letter-spacing: 0.03em;
}
.cta-card p {
  font-size: 1.05rem;
  color: var(--text-muted);
  margin-bottom: 32px;
  line-height: 1.8;
}
.cta-card .btn-group {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}

/* Footer */
.footer {
  background-color: var(--footer-bg);
  color: var(--footer-text);
  padding: 64px 0 0;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1fr;
  gap: 48px;
  margin-bottom: 48px;
}
.footer-brand .logo {
  color: #fff;
  font-size: 1.5rem;
  margin-bottom: 16px;
}
.footer-brand .logo:hover {
  color: var(--accent-light);
}
.footer-brand .logo-mark {
  background: var(--primary);
}
.footer-brand p {
  font-size: 0.9rem;
  color: var(--footer-text);
  line-height: 1.8;
  max-width: 280px;
}
.footer-col h4 {
  font-size: 0.9rem;
  font-weight: 600;
  color: #fff;
  letter-spacing: 0.06em;
  margin-bottom: 18px;
  text-transform: uppercase;
}
.footer-col a {
  display: block;
  font-size: 0.9rem;
  color: var(--footer-text);
  padding: 6px 0;
  transition: var(--transition);
}
.footer-col a:hover {
  color: #fff;
}
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.1);
  padding: 24px 0;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  font-size: 0.82rem;
  color: rgba(255,255,255,0.5);
}
.footer-bottom a {
  color: rgba(255,255,255,0.5);
  transition: var(--transition);
}
.footer-bottom a:hover {
  color: #fff;
}
.footer-bottom-links {
  display: flex;
  gap: 18px;
}

/* Responsive */
@media (max-width: 1199px) {
  .container {
    padding: 0 32px;
  }
  .header-inner {
    padding: 0 32px;
  }
  .hero-inner {
    padding: 64px 32px 80px;
    grid-template-columns: 1fr 320px;
    gap: 40px;
  }
  .hero-inner h1 {
    font-size: 2.6rem;
  }
  .stats-grid {
    gap: 24px;
  }
  .stat-num {
    font-size: 2.4rem;
  }
  .footer-grid {
    gap: 32px;
  }
}
@media (max-width: 991px) {
  .hero-inner {
    grid-template-columns: 1fr;
    gap: 40px;
  }
  .hero-data-panel {
    max-width: 520px;
  }
  .feature-list-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }
  .feature-list-image img {
    height: 360px;
  }
  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 8px;
  }
  .stat-item {
    border-right: none;
    border-bottom: 1px solid rgba(255,255,255,0.08);
    padding: 20px 12px;
  }
  .stat-item:nth-child(3),
  .stat-item:nth-child(4) {
    border-bottom: none;
  }
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
}
@media (max-width: 767px) {
  :root {
    --section-gap: 64px;
    --header-height: 60px;
  }
  .container {
    padding: 0 20px;
  }
  .header-inner {
    padding: 0 20px;
  }
  .nav-links {
    position: fixed;
    top: var(--header-height);
    left: 0;
    right: 0;
    background: #fff;
    flex-direction: column;
    align-items: flex-start;
    gap: 0;
    padding: 24px 20px 32px;
    box-shadow: var(--shadow-lg);
    clip-path: inset(0 0 100% 0);
    transition: clip-path 0.3s ease;
    z-index: 999;
  }
  .nav-links.open {
    clip-path: inset(0 0 0 0);
  }
  .nav-links a {
    display: block;
    width: 100%;
    padding: 14px 0;
    font-size: 1.05rem;
    border-bottom: 1px solid var(--border-light);
  }
  .nav-links a::after {
    display: none;
  }
  .header-actions {
    gap: 10px;
  }
  .lang-switch button {
    padding: 5px 10px;
    font-size: 0.78rem;
  }
  .nav-cta {
    display: none;
  }
  .hamburger {
    display: flex;
  }
  .hero-inner {
    padding: 48px 20px 64px;
  }
  .hero-inner h1 {
    font-size: 2rem;
    letter-spacing: 0.03em;
  }
  .hero-lead {
    font-size: 1rem;
    line-height: 1.8;
  }
  .hero-cta-group {
    flex-direction: column;
  }
  .hero-cta-group .btn {
    width: 100%;
  }
  .hero-data-panel {
    padding: 24px 20px;
  }
  .hero-data-item .data-num {
    font-size: 1.6rem;
  }
  .section-header h2 {
    font-size: 1.7rem;
  }
  .timeline-wrap {
    padding-left: 28px;
  }
  .timeline-wrap::before {
    left: 8px;
  }
  .timeline-item::before {
    left: -25px;
    width: 12px;
    height: 12px;
    border-width: 2.5px;
  }
  .timeline-content {
    padding: 18px 20px;
  }
  .feature-list-item {
    flex-direction: column;
    gap: 12px;
    padding: 18px 0;
  }
  .feature-list-item:hover {
    padding-left: 0;
  }
  .feature-num {
    width: 32px;
    height: 32px;
    font-size: 0.8rem;
  }
  .feature-list-image img {
    height: 260px;
  }
  .brand-intro-card {
    padding: 32px 24px;
  }
  .brand-intro-card h2 {
    font-size: 1.5rem;
  }
  .stats-grid {
    grid-template-columns: 1fr 1fr;
    gap: 0;
  }
  .stat-num {
    font-size: 2rem;
  }
  .faq-question {
    padding: 18px 20px;
  }
  .faq-question h3 {
    font-size: 0.95rem;
  }
  .faq-answer p {
    font-size: 0.9rem;
  }
  .cta-card {
    padding: 40px 24px;
  }
  .cta-card h2 {
    font-size: 1.6rem;
  }
  .cta-card .btn-group {
    flex-direction: column;
  }
  .cta-card .btn {
    width: 100%;
  }
  .footer {
    padding: 48px 0 0;
  }
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 32px;
    margin-bottom: 32px;
  }
  .footer-bottom {
    flex-direction: column;
    text-align: center;
    gap: 8px;
  }
  .footer-bottom-links {
    flex-wrap: wrap;
    justify-content: center;
  }
}
@media (max-width: 520px) {
  .hero-inner h1 {
    font-size: 1.7rem;
  }
  .hero-data-panel {
    padding: 20px 16px;
  }
  .stats-grid {
    grid-template-columns: 1fr;
  }
  .stat-item {
    border-bottom: 1px solid rgba(255,255,255,0.08);
  }
  .stat-item:nth-child(3),
  .stat-item:nth-child(4) {
    border-bottom: 1px solid rgba(255,255,255,0.08);
  }
  .stat-item:last-child {
    border-bottom: none;
  }
  .brand-intro-card {
    padding: 28px 20px;
  }
}

/* roulang page: category4 */
:root {
        --primary: #6b7d8e;
        --primary-dark: #4e5f6e;
        --primary-light: #8fa3b3;
        --primary-bg: #f3f6f8;
        --accent: #b8a992;
        --accent-light: #d8cdbd;
        --bg: #faf9f7;
        --card-bg: #ffffff;
        --text-primary: #1c1e21;
        --text-secondary: #3d4348;
        --text-muted: #6f767d;
        --text-light: #9aa1a7;
        --border: #e2e6ea;
        --border-light: #edf0f2;
        --footer-bg: #1a1d20;
        --footer-text: #c6ccd1;
        --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.04);
        --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.06);
        --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.08);
        --radius-sm: 6px;
        --radius-md: 12px;
        --radius-lg: 16px;
        --radius-full: 999px;
        --font-sans: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", "Source Han Sans SC", "System UI", -apple-system, "Segoe UI", Roboto, sans-serif;
        --transition: all 0.25s cubic-bezier(0.25, 0.46, 0.45, 0.94);
        --transition-slow: all 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
        --container-max: 1240px;
        --header-height: 68px;
        --section-gap: 72px;
        --section-gap-mobile: 64px;
    }

    *,
    *::before,
    *::after {
        box-sizing: border-box;
        margin: 0;
        padding: 0;
    }

    html {
        scroll-behavior: smooth;
        -webkit-text-size-adjust: 100%;
    }

    body {
        font-family: var(--font-sans);
        font-size: 16px;
        line-height: 1.75;
        color: var(--text-secondary);
        background-color: var(--bg);
        -webkit-font-smoothing: antialiased;
        -moz-osx-font-smoothing: grayscale;
        overflow-x: hidden;
    }

    a {
        color: var(--text-primary);
        text-decoration: none;
        transition: var(--transition);
    }

    a:hover {
        color: var(--primary);
    }

    img {
        max-width: 100%;
        height: auto;
        display: block;
    }

    button,
    input,
    select,
    textarea {
        font-family: inherit;
        font-size: inherit;
        line-height: inherit;
    }

    button {
        cursor: pointer;
        border: none;
        background: none;
    }

    ul,
    ol {
        list-style: none;
    }

    .container {
        max-width: var(--container-max);
        margin: 0 auto;
        padding: 0 24px;
    }

    .visually-hidden {
        position: absolute;
        width: 1px;
        height: 1px;
        padding: 0;
        margin: -1px;
        overflow: hidden;
        clip: rect(0, 0, 0, 0);
        white-space: nowrap;
        border: 0;
    }

    /* Header */
    .header {
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
        z-index: 100;
        height: var(--header-height);
        background: rgba(255, 255, 255, 0.94);
        backdrop-filter: blur(16px);
        -webkit-backdrop-filter: blur(16px);
        border-bottom: 1px solid var(--border-light);
        transition: var(--transition);
    }

    .header.scrolled {
        box-shadow: var(--shadow-md);
        border-bottom-color: var(--border);
    }

    .header-inner {
        max-width: var(--container-max);
        margin: 0 auto;
        padding: 0 24px;
        height: 100%;
        display: flex;
        align-items: center;
        justify-content: space-between;
        gap: 20px;
    }

    .logo {
        display: inline-flex;
        align-items: center;
        gap: 10px;
        font-size: 1.45rem;
        font-weight: 600;
        color: var(--text-primary);
        letter-spacing: 0.06em;
        white-space: nowrap;
        flex-shrink: 0;
    }

    .logo-mark {
        display: inline-flex;
        align-items: center;
        justify-content: center;
        width: 34px;
        height: 34px;
        border-radius: var(--radius-sm);
        background: var(--text-primary);
        color: #fff;
        font-size: 1rem;
        font-weight: 500;
        letter-spacing: 0;
    }

    .nav {
        display: flex;
        align-items: center;
        gap: 24px;
        flex: 1;
        justify-content: space-between;
    }

    .nav-links {
        display: flex;
        align-items: center;
        gap: 28px;
        flex: 1;
        justify-content: center;
    }

    .nav-links a {
        font-size: 0.93rem;
        font-weight: 500;
        color: var(--text-secondary);
        letter-spacing: 0.02em;
        padding: 8px 2px;
        position: relative;
        transition: var(--transition);
        white-space: nowrap;
    }

    .nav-links a::after {
        content: '';
        position: absolute;
        left: 0;
        bottom: 2px;
        width: 0;
        height: 2px;
        background: var(--primary);
        transition: var(--transition);
        border-radius: 2px;
    }

    .nav-links a:hover {
        color: var(--primary);
    }

    .nav-links a:hover::after,
    .nav-links a.active::after {
        width: 100%;
    }

    .nav-links a.active {
        color: var(--primary);
        font-weight: 600;
    }

    .header-actions {
        display: flex;
        align-items: center;
        gap: 14px;
        flex-shrink: 0;
    }

    .lang-switch {
        display: inline-flex;
        align-items: center;
        background: var(--primary-bg);
        border-radius: var(--radius-full);
        padding: 3px;
        gap: 2px;
    }

    .lang-switch button {
        padding: 6px 14px;
        font-size: 0.8rem;
        font-weight: 500;
        color: var(--text-muted);
        border-radius: var(--radius-full);
        transition: var(--transition);
        letter-spacing: 0.03em;
        white-space: nowrap;
    }

    .lang-switch button:hover {
        color: var(--text-primary);
    }

    .lang-switch button.active {
        background: var(--text-primary);
        color: #fff;
    }

    .btn {
        display: inline-flex;
        align-items: center;
        justify-content: center;
        padding: 0 24px;
        height: 48px;
        border-radius: var(--radius-sm);
        font-size: 0.95rem;
        font-weight: 500;
        letter-spacing: 0.03em;
        transition: var(--transition);
        white-space: nowrap;
        line-height: 1;
        gap: 8px;
    }

    .btn-primary {
        background-color: var(--text-primary);
        color: #fff;
        box-shadow: var(--shadow-sm);
    }

    .btn-primary:hover {
        background-color: var(--primary-dark);
        color: #fff;
        box-shadow: var(--shadow-md);
        transform: translateY(-1px);
    }

    .btn-primary:active {
        transform: translateY(0);
        box-shadow: var(--shadow-sm);
    }

    .btn-primary:focus-visible {
        outline: 3px solid rgba(107, 125, 142, 0.35);
        outline-offset: 2px;
    }

    .btn-secondary {
        background-color: transparent;
        color: var(--text-primary);
        border: 1px solid var(--border);
    }

    .btn-secondary:hover {
        background-color: var(--primary-bg);
        border-color: var(--primary-light);
        color: var(--primary-dark);
    }

    .btn-secondary:active {
        background-color: var(--border-light);
    }

    .btn-secondary:focus-visible {
        outline: 3px solid rgba(107, 125, 142, 0.35);
        outline-offset: 2px;
    }

    .btn-small {
        height: 40px;
        padding: 0 18px;
        font-size: 0.88rem;
    }

    .btn-white {
        background-color: #fff;
        color: var(--text-primary);
        border: 1px solid rgba(255, 255, 255, 0.6);
        box-shadow: var(--shadow-sm);
    }

    .btn-white:hover {
        background-color: var(--primary-bg);
        color: var(--primary-dark);
        box-shadow: var(--shadow-md);
        transform: translateY(-1px);
    }

    .hamburger {
        display: none;
        flex-direction: column;
        justify-content: center;
        align-items: center;
        gap: 5px;
        width: 42px;
        height: 42px;
        border-radius: var(--radius-sm);
        border: 1px solid var(--border);
        background: transparent;
        transition: var(--transition);
        flex-shrink: 0;
    }

    .hamburger span {
        display: block;
        width: 18px;
        height: 1.5px;
        background: var(--text-primary);
        transition: var(--transition);
        border-radius: 2px;
    }

    .hamburger:hover {
        background: var(--primary-bg);
        border-color: var(--primary-light);
    }

    .hamburger.active span:nth-child(1) {
        transform: translateY(6.5px) rotate(45deg);
    }

    .hamburger.active span:nth-child(2) {
        opacity: 0;
    }

    .hamburger.active span:nth-child(3) {
        transform: translateY(-6.5px) rotate(-45deg);
    }

    /* Hero */
    .hero-page {
        padding-top: calc(var(--header-height) + 48px);
        padding-bottom: 48px;
        position: relative;
        overflow: hidden;
        min-height: 620px;
        display: flex;
        align-items: center;
        background-image: linear-gradient(105deg, rgba(250, 249, 247, 0.96) 35%, rgba(250, 249, 247, 0.55) 65%, rgba(250, 249, 247, 0.25) 100%), url('/assets/images/backpic/back-2.webp');
        background-size: cover;
        background-position: center right;
        background-repeat: no-repeat;
    }

    .hero-page::before {
        content: '';
        position: absolute;
        top: 0;
        left: 0;
        right: 0;
        bottom: 0;
        background: linear-gradient(180deg, transparent 60%, rgba(250, 249, 247, 0.7) 100%);
        pointer-events: none;
        z-index: 1;
    }

    .hero-page .container {
        position: relative;
        z-index: 2;
        width: 100%;
    }

    .hero-page-content {
        max-width: 680px;
        padding: 40px 0 20px;
    }

    .hero-page-tag {
        display: inline-block;
        padding: 6px 16px;
        background: rgba(107, 125, 142, 0.1);
        color: var(--primary-dark);
        font-size: 0.82rem;
        font-weight: 500;
        letter-spacing: 0.08em;
        border-radius: var(--radius-full);
        margin-bottom: 20px;
        border: 1px solid rgba(107, 125, 142, 0.2);
    }

    .hero-page h1 {
        font-size: 2.9rem;
        font-weight: 500;
        color: var(--text-primary);
        letter-spacing: 0.04em;
        line-height: 1.25;
        margin-bottom: 20px;
    }

    .hero-page-sub {
        font-size: 1.1rem;
        color: var(--text-muted);
        line-height: 1.8;
        max-width: 560px;
        margin-bottom: 32px;
    }

    .hero-page-actions {
        display: flex;
        gap: 14px;
        flex-wrap: wrap;
        margin-bottom: 36px;
    }

    .hero-series-nav {
        display: flex;
        gap: 8px;
        flex-wrap: wrap;
        border-top: 1px solid var(--border-light);
        padding-top: 20px;
    }

    .hero-series-nav a {
        display: inline-block;
        padding: 8px 16px;
        font-size: 0.85rem;
        font-weight: 500;
        color: var(--text-secondary);
        background: rgba(255, 255, 255, 0.7);
        border: 1px solid var(--border);
        border-radius: var(--radius-full);
        transition: var(--transition);
        letter-spacing: 0.02em;
        white-space: nowrap;
    }

    .hero-series-nav a:hover {
        background: var(--text-primary);
        color: #fff;
        border-color: var(--text-primary);
    }

    /* Directory Layout */
    .directory-section {
        padding: var(--section-gap) 0;
        background: var(--card-bg);
        border-top: 1px solid var(--border-light);
    }

    .directory-layout {
        display: grid;
        grid-template-columns: 280px 1fr;
        gap: 56px;
        align-items: start;
    }

    .directory-sidebar {
        position: sticky;
        top: calc(var(--header-height) + 32px);
        background: var(--bg);
        border: 1px solid var(--border-light);
        border-radius: var(--radius-md);
        padding: 24px 20px;
    }

    .directory-sidebar h3 {
        font-size: 0.9rem;
        font-weight: 600;
        color: var(--text-primary);
        letter-spacing: 0.06em;
        text-transform: uppercase;
        margin-bottom: 16px;
        padding-bottom: 12px;
        border-bottom: 1px solid var(--border);
    }

    .directory-sidebar nav {
        display: flex;
        flex-direction: column;
        gap: 2px;
    }

    .directory-sidebar nav a {
        display: block;
        padding: 10px 14px;
        font-size: 0.9rem;
        font-weight: 500;
        color: var(--text-secondary);
        border-radius: var(--radius-sm);
        transition: var(--transition);
        letter-spacing: 0.02em;
        border-left: 2px solid transparent;
    }

    .directory-sidebar nav a:hover {
        background: var(--primary-bg);
        color: var(--primary-dark);
        border-left-color: var(--primary-light);
    }

    .directory-sidebar nav a.active {
        background: var(--primary-bg);
        color: var(--primary-dark);
        font-weight: 600;
        border-left-color: var(--primary);
    }

    .directory-detail {
        min-width: 0;
    }

    .directory-detail section {
        padding: 32px 0;
        border-bottom: 1px solid var(--border-light);
        scroll-margin-top: 100px;
    }

    .directory-detail section:first-child {
        padding-top: 0;
    }

    .directory-detail section:last-child {
        border-bottom: none;
        padding-bottom: 0;
    }

    .directory-detail h2 {
        font-size: 1.6rem;
        font-weight: 500;
        color: var(--text-primary);
        letter-spacing: 0.03em;
        margin-bottom: 8px;
    }

    .directory-detail .detail-desc {
        font-size: 1rem;
        color: var(--text-muted);
        line-height: 1.8;
        margin-bottom: 16px;
    }

    .detail-points {
        display: flex;
        flex-wrap: wrap;
        gap: 10px;
        margin-bottom: 12px;
    }

    .detail-point {
        display: inline-flex;
        align-items: center;
        gap: 6px;
        padding: 6px 14px;
        font-size: 0.82rem;
        font-weight: 500;
        color: var(--text-secondary);
        background: var(--primary-bg);
        border-radius: var(--radius-full);
        letter-spacing: 0.02em;
        border: 1px solid var(--border-light);
    }

    .detail-point::before {
        content: '';
        width: 5px;
        height: 5px;
        border-radius: 50%;
        background: var(--accent);
        flex-shrink: 0;
    }

    .detail-note {
        font-size: 0.88rem;
        color: var(--text-light);
        line-height: 1.7;
        padding: 12px 16px;
        background: var(--bg);
        border-left: 3px solid var(--accent-light);
        border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
    }

    /* Featured Section */
    .featured-coop {
        padding: var(--section-gap) 0;
        background: var(--bg);
    }

    .featured-grid {
        display: grid;
        grid-template-columns: repeat(3, 1fr);
        gap: 24px;
        margin-top: 40px;
    }

    .featured-card {
        background: var(--card-bg);
        border-radius: var(--radius-md);
        border: 1px solid var(--border-light);
        overflow: hidden;
        transition: var(--transition);
        display: flex;
        flex-direction: column;
    }

    .featured-card:hover {
        box-shadow: var(--shadow-md);
        transform: translateY(-2px);
        border-color: var(--border);
    }

    .featured-card-img {
        position: relative;
        height: 200px;
        background-size: cover;
        background-position: center;
        overflow: hidden;
    }

    .featured-card-img::after {
        content: '';
        position: absolute;
        top: 0;
        left: 0;
        right: 0;
        bottom: 0;
        background: linear-gradient(180deg, transparent 50%, rgba(0, 0, 0, 0.25) 100%);
        pointer-events: none;
    }

    .featured-card-body {
        padding: 24px 28px;
        flex: 1;
        display: flex;
        flex-direction: column;
    }

    .featured-card-body h3 {
        font-size: 1.15rem;
        font-weight: 600;
        color: var(--text-primary);
        letter-spacing: 0.02em;
        margin-bottom: 10px;
    }

    .featured-card-body p {
        font-size: 0.92rem;
        color: var(--text-muted);
        line-height: 1.7;
        flex: 1;
    }

    .featured-card-link {
        display: inline-block;
        margin-top: 16px;
        font-size: 0.88rem;
        font-weight: 500;
        color: var(--primary-dark);
        letter-spacing: 0.02em;
        transition: var(--transition);
    }

    .featured-card-link:hover {
        color: var(--primary);
        letter-spacing: 0.04em;
    }

    /* Process */
    .process-section {
        padding: var(--section-gap) 0;
        background: var(--primary-bg);
        border-top: 1px solid var(--border-light);
        border-bottom: 1px solid var(--border-light);
    }

    .process-steps {
        display: grid;
        grid-template-columns: repeat(4, 1fr);
        gap: 20px;
        margin-top: 40px;
    }

    .process-step {
        background: var(--card-bg);
        border-radius: var(--radius-md);
        padding: 28px 24px;
        text-align: left;
        transition: var(--transition);
        border: 1px solid var(--border-light);
    }

    .process-step:hover {
        box-shadow: var(--shadow-md);
        transform: translateY(-2px);
        border-color: var(--border);
    }

    .process-step-number {
        display: inline-flex;
        align-items: center;
        justify-content: center;
        width: 40px;
        height: 40px;
        border-radius: 50%;
        background: var(--text-primary);
        color: #fff;
        font-size: 0.9rem;
        font-weight: 600;
        margin-bottom: 16px;
        letter-spacing: 0;
    }

    .process-step h3 {
        font-size: 1.05rem;
        font-weight: 600;
        color: var(--text-primary);
        letter-spacing: 0.02em;
        margin-bottom: 8px;
    }

    .process-step p {
        font-size: 0.88rem;
        color: var(--text-muted);
        line-height: 1.7;
    }

    /* CTA Section */
    .cta-section {
        padding: var(--section-gap) 0;
        background: var(--footer-bg);
        color: #fff;
        position: relative;
        overflow: hidden;
    }

    .cta-section::before {
        content: '';
        position: absolute;
        top: -60%;
        right: -20%;
        width: 600px;
        height: 600px;
        border-radius: 50%;
        background: radial-gradient(circle, rgba(107, 125, 142, 0.2), transparent 70%);
        pointer-events: none;
    }

    .cta-inner {
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: 48px;
        align-items: center;
        position: relative;
        z-index: 1;
    }

    .cta-text h2 {
        font-size: 2rem;
        font-weight: 500;
        color: #fff;
        letter-spacing: 0.04em;
        line-height: 1.35;
        margin-bottom: 16px;
    }

    .cta-text p {
        font-size: 1rem;
        color: var(--footer-text);
        line-height: 1.8;
        max-width: 480px;
    }

    .cta-actions {
        display: flex;
        gap: 14px;
        flex-wrap: wrap;
        justify-content: flex-end;
    }

    .btn-outline-white {
        background: transparent;
        color: #fff;
        border: 1px solid rgba(255, 255, 255, 0.3);
    }

    .btn-outline-white:hover {
        background: rgba(255, 255, 255, 0.08);
        border-color: rgba(255, 255, 255, 0.5);
        color: #fff;
    }

    .btn-white-solid {
        background: #fff;
        color: var(--text-primary);
        border: 1px solid #fff;
    }

    .btn-white-solid:hover {
        background: var(--primary-bg);
        border-color: var(--primary-bg);
        color: var(--primary-dark);
    }

    /* FAQ */
    .faq-section {
        padding: var(--section-gap) 0;
        background: var(--bg);
    }

    .faq-list {
        max-width: 760px;
        margin: 0 auto;
        border-top: 1px solid var(--border);
    }

    .faq-item {
        border-bottom: 1px solid var(--border);
        background: transparent;
        transition: var(--transition);
    }

    .faq-item.open {
        background: var(--primary-bg);
        border-bottom-color: var(--primary-light);
    }

    .faq-question {
        display: flex;
        align-items: center;
        justify-content: space-between;
        padding: 20px 8px;
        cursor: pointer;
        font-size: 1.02rem;
        font-weight: 500;
        color: var(--text-primary);
        letter-spacing: 0.02em;
        transition: var(--transition);
        text-align: left;
        width: 100%;
        gap: 16px;
    }

    .faq-question:hover {
        color: var(--primary-dark);
    }

    .faq-icon {
        display: inline-flex;
        align-items: center;
        justify-content: center;
        width: 24px;
        height: 24px;
        position: relative;
        flex-shrink: 0;
        transition: var(--transition);
    }

    .faq-icon::before,
    .faq-icon::after {
        content: '';
        position: absolute;
        background: var(--primary);
        border-radius: 2px;
        transition: var(--transition);
    }

    .faq-icon::before {
        width: 14px;
        height: 1.5px;
    }

    .faq-icon::after {
        width: 1.5px;
        height: 14px;
    }

    .faq-item.open .faq-icon {
        transform: rotate(45deg);
    }

    .faq-item.open .faq-icon::before,
    .faq-item.open .faq-icon::after {
        background: var(--primary-dark);
    }

    .faq-answer {
        max-height: 0;
        overflow: hidden;
        transition: var(--transition-slow);
        padding: 0 8px;
    }

    .faq-item.open .faq-answer {
        max-height: 400px;
        padding: 0 8px 20px;
    }

    .faq-answer p {
        font-size: 0.95rem;
        color: var(--text-muted);
        line-height: 1.8;
    }

    /* Footer */
    .footer {
        background: var(--footer-bg);
        color: var(--footer-text);
        padding: 64px 0 28px;
    }

    .footer-grid {
        display: grid;
        grid-template-columns: 2fr 1fr 1fr 1fr;
        gap: 40px;
        margin-bottom: 48px;
    }

    .footer-brand .logo {
        color: #fff;
        margin-bottom: 16px;
        font-size: 1.35rem;
    }

    .footer-brand .logo-mark {
        background: #fff;
        color: var(--footer-bg);
    }

    .footer-brand p {
        font-size: 0.88rem;
        color: var(--footer-text);
        line-height: 1.8;
        max-width: 320px;
    }

    .footer-col {
        display: flex;
        flex-direction: column;
        gap: 4px;
    }

    .footer-col h4 {
        font-size: 0.9rem;
        font-weight: 600;
        color: #fff;
        letter-spacing: 0.06em;
        margin-bottom: 12px;
    }

    .footer-col a {
        font-size: 0.88rem;
        color: var(--footer-text);
        padding: 4px 0;
        transition: var(--transition);
    }

    .footer-col a:hover {
        color: #fff;
    }

    .footer-bottom {
        border-top: 1px solid rgba(255, 255, 255, 0.1);
        padding-top: 24px;
        display: flex;
        flex-direction: column;
        gap: 8px;
    }

    .footer-bottom p {
        font-size: 0.8rem;
        color: var(--text-light);
    }

    .footer-bottom-links {
        display: flex;
        gap: 16px;
        flex-wrap: wrap;
    }

    .footer-bottom-links a {
        font-size: 0.8rem;
        color: var(--text-light);
        transition: var(--transition);
    }

    .footer-bottom-links a:hover {
        color: #fff;
    }

    /* Responsive */
    @media (max-width: 1024px) {
        .directory-layout {
            grid-template-columns: 1fr;
            gap: 32px;
        }

        .directory-sidebar {
            position: static;
            display: flex;
            flex-direction: column;
        }

        .directory-sidebar nav {
            flex-direction: row;
            flex-wrap: wrap;
            gap: 6px;
        }

        .directory-sidebar nav a {
            display: inline-block;
            padding: 8px 14px;
            border-left: none;
            border-bottom: 2px solid transparent;
            border-radius: var(--radius-sm);
        }

        .directory-sidebar nav a:hover,
        .directory-sidebar nav a.active {
            border-left-color: transparent;
            border-bottom-color: var(--primary);
        }

        .featured-grid {
            grid-template-columns: repeat(2, 1fr);
        }

        .process-steps {
            grid-template-columns: repeat(2, 1fr);
        }

        .cta-inner {
            grid-template-columns: 1fr;
            gap: 24px;
        }

        .cta-actions {
            justify-content: flex-start;
        }

        .footer-grid {
            grid-template-columns: 1fr 1fr;
        }
    }

    @media (max-width: 768px) {
        :root {
            --section-gap: 64px;
            --header-height: 60px;
        }

        .nav-links {
            display: none;
            position: fixed;
            top: var(--header-height);
            left: 0;
            right: 0;
            background: #fff;
            flex-direction: column;
            align-items: flex-start;
            padding: 24px;
            gap: 4px;
            border-bottom: 1px solid var(--border);
            box-shadow: var(--shadow-md);
            z-index: 99;
        }

        .nav-links.open {
            display: flex;
        }

        .nav-links a {
            display: block;
            width: 100%;
            padding: 12px 8px;
            font-size: 1rem;
            border-bottom: 1px solid var(--border-light);
        }

        .nav-links a::after {
            display: none;
        }

        .hamburger {
            display: flex;
        }

        .nav-cta {
            display: none;
        }

        .hero-page {
            min-height: 520px;
            padding-top: calc(var(--header-height) + 32px);
            background-position: center;
            background-image: linear-gradient(180deg, rgba(250, 249, 247, 0.85) 30%, rgba(250, 249, 247, 0.5) 100%), url('/assets/images/backpic/back-2.webp');
        }

        .hero-page h1 {
            font-size: 2.1rem;
        }

        .hero-page-sub {
            font-size: 1rem;
        }

        .hero-series-nav a {
            padding: 6px 12px;
            font-size: 0.78rem;
        }

        .featured-grid {
            grid-template-columns: 1fr;
        }

        .process-steps {
            grid-template-columns: 1fr;
        }

        .footer-grid {
            grid-template-columns: 1fr;
            gap: 28px;
        }

        .section-header h2 {
            font-size: 1.7rem;
        }
    }

    @media (max-width: 480px) {
        .container {
            padding: 0 16px;
        }

        .header-inner {
            padding: 0 16px;
            gap: 10px;
        }

        .logo {
            font-size: 1.2rem;
            gap: 8px;
        }

        .logo-mark {
            width: 28px;
            height: 28px;
            font-size: 0.85rem;
        }

        .lang-switch button {
            padding: 5px 10px;
            font-size: 0.72rem;
        }

        .hero-page {
            min-height: 460px;
            padding-top: calc(var(--header-height) + 24px);
        }

        .hero-page h1 {
            font-size: 1.75rem;
            letter-spacing: 0.02em;
        }

        .hero-page-actions {
            flex-direction: column;
            align-items: flex-start;
        }

        .hero-page-actions .btn {
            width: 100%;
        }

        .hero-series-nav a {
            padding: 6px 10px;
            font-size: 0.75rem;
        }

        .directory-detail h2 {
            font-size: 1.3rem;
        }

        .directory-detail section {
            padding: 24px 0;
        }

        .directory-sidebar {
            padding: 18px 14px;
        }

        .directory-sidebar nav a {
            font-size: 0.78rem;
            padding: 7px 10px;
        }

        .featured-card-body {
            padding: 20px;
        }

        .process-step {
            padding: 20px;
        }

        .faq-question {
            font-size: 0.92rem;
            padding: 16px 4px;
        }
    }

/* roulang page: category5 */
:root {
  --primary: #6b7d8e;
  --primary-dark: #4e5f6e;
  --primary-light: #8fa3b3;
  --primary-bg: #f3f6f8;
  --accent: #b8a992;
  --accent-light: #d8cdbd;
  --bg: #faf9f7;
  --card-bg: #ffffff;
  --text-primary: #1c1e21;
  --text-secondary: #3d4348;
  --text-muted: #6f767d;
  --text-light: #9aa1a7;
  --border: #e2e6ea;
  --border-light: #edf0f2;
  --footer-bg: #1a1d20;
  --footer-text: #c6ccd1;
  --hero-bg: #1c2024;
  --hero-card: #262b31;
  --hero-border: #353b42;
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.04);
  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.08);
  --shadow-dark: 0 12px 40px rgba(0, 0, 0, 0.28);
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-full: 999px;
  --font-sans: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", "Source Han Sans SC", "System UI", -apple-system, "Segoe UI", Roboto, sans-serif;
  --transition: all 0.25s cubic-bezier(0.25, 0.46, 0.45, 0.94);
  --transition-slow: all 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
  --container-max: 1240px;
  --header-height: 68px;
  --section-gap: 72px;
  --section-gap-mobile: 56px;
}

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.75;
  color: var(--text-secondary);
  background-color: var(--bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

a {
  color: var(--text-primary);
  text-decoration: none;
  transition: var(--transition);
}

a:hover {
  color: var(--primary);
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

button,
input,
select,
textarea {
  font-family: inherit;
  font-size: inherit;
  line-height: inherit;
}

button {
  cursor: pointer;
  border: none;
  background: none;
}

.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 24px;
}

/* Header */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  height: var(--header-height);
  background: rgba(250, 249, 247, 0.96);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-light);
  transition: var(--transition);
}

.header.scrolled {
  box-shadow: var(--shadow-md);
  background: rgba(250, 249, 247, 0.98);
}

.header-inner {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 24px;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.logo {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 1.35rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  color: var(--text-primary);
  flex-shrink: 0;
}

.logo:hover {
  color: var(--primary-dark);
}

.logo-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  background: var(--text-primary);
  color: #fff;
  border-radius: 8px;
  font-size: 0.95rem;
  font-weight: 500;
  letter-spacing: 0;
}

.nav {
  display: flex;
  align-items: center;
  gap: 20px;
  flex: 1;
  justify-content: flex-end;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 4px;
  flex-wrap: nowrap;
}

.nav-links a {
  display: inline-flex;
  align-items: center;
  padding: 8px 12px;
  font-size: 0.92rem;
  font-weight: 500;
  color: var(--text-secondary);
  border-radius: var(--radius-sm);
  letter-spacing: 0.02em;
  white-space: nowrap;
  transition: var(--transition);
  position: relative;
}

.nav-links a:hover {
  color: var(--primary-dark);
  background: var(--primary-bg);
}

.nav-links a.active {
  color: var(--text-primary);
  background: var(--primary-bg);
  font-weight: 600;
}

.nav-links a.active::after {
  content: '';
  position: absolute;
  bottom: 2px;
  left: 12px;
  right: 12px;
  height: 2px;
  background: var(--primary);
  border-radius: 1px;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
}

.lang-switch {
  display: inline-flex;
  align-items: center;
  gap: 2px;
  background: var(--border-light);
  border-radius: var(--radius-full);
  padding: 3px;
}

.lang-switch button {
  padding: 5px 14px;
  font-size: 0.82rem;
  font-weight: 500;
  color: var(--text-muted);
  border-radius: var(--radius-full);
  transition: var(--transition);
  letter-spacing: 0.03em;
}

.lang-switch button:hover {
  color: var(--text-primary);
}

.lang-switch button.active {
  background: var(--text-primary);
  color: #fff;
}

.nav-cta {
  display: inline-flex;
  height: 40px;
  padding: 0 18px;
  font-size: 0.88rem;
  font-weight: 500;
  background: var(--text-primary);
  color: #fff;
  border-radius: var(--radius-sm);
  align-items: center;
  gap: 6px;
  letter-spacing: 0.03em;
  transition: var(--transition);
  white-space: nowrap;
  line-height: 1;
}

.nav-cta:hover {
  background: var(--primary-dark);
  color: #fff;
  box-shadow: var(--shadow-md);
  transform: translateY(-1px);
}

.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 8px;
  border-radius: var(--radius-sm);
}

.hamburger span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--text-primary);
  transition: var(--transition);
  transform-origin: center;
}

.hamburger:hover span {
  background: var(--primary);
}

/* Hero - Dark */
.hero-dark {
  padding-top: calc(var(--header-height) + 56px);
  padding-bottom: 72px;
  background: var(--hero-bg);
  color: #fff;
  position: relative;
  overflow: hidden;
}

.hero-dark::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(135deg, rgba(107, 125, 142, 0.15) 0%, rgba(184, 169, 146, 0.08) 45%, rgba(28, 32, 36, 0.4) 100%);
  pointer-events: none;
}

.hero-dark::after {
  content: '';
  position: absolute;
  top: -180px;
  right: -120px;
  width: 480px;
  height: 480px;
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: 50%;
  pointer-events: none;
}

.hero-dark .container {
  position: relative;
  z-index: 2;
}

.hero-dark-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 56px;
  align-items: center;
}

.hero-dark-tag {
  display: inline-block;
  font-size: 0.78rem;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent-light);
  border: 1px solid rgba(216, 205, 189, 0.35);
  border-radius: var(--radius-full);
  padding: 6px 16px;
  margin-bottom: 20px;
}

.hero-dark h1 {
  font-size: 2.75rem;
  font-weight: 500;
  line-height: 1.28;
  letter-spacing: 0.03em;
  color: #fff;
  margin-bottom: 18px;
}

.hero-dark .hero-sub {
  font-size: 1.08rem;
  line-height: 1.8;
  color: rgba(255, 255, 255, 0.75);
  max-width: 560px;
  margin-bottom: 28px;
}

.hero-dark-actions {
  display: flex;
  align-items: center;
  gap: 14px;
  flex-wrap: wrap;
}

.hero-dark .btn-primary {
  background: #fff;
  color: var(--text-primary);
  box-shadow: var(--shadow-md);
}

.hero-dark .btn-primary:hover {
  background: var(--accent-light);
  color: var(--text-primary);
  box-shadow: var(--shadow-lg);
  transform: translateY(-1px);
}

.hero-dark .btn-secondary {
  border-color: rgba(255, 255, 255, 0.35);
  color: #fff;
  background: transparent;
}

.hero-dark .btn-secondary:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: rgba(255, 255, 255, 0.55);
  color: #fff;
}

.hero-data-panel {
  background: var(--hero-card);
  border: 1px solid var(--hero-border);
  border-radius: var(--radius-lg);
  padding: 28px 28px 20px;
  box-shadow: var(--shadow-dark);
}

.hero-data-panel h3 {
  font-size: 0.82rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.5);
  margin-bottom: 18px;
}

.hero-data-list {
  display: flex;
  flex-direction: column;
  gap: 0;
}

.hero-data-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.hero-data-item:last-child {
  border-bottom: none;
  padding-bottom: 4px;
}

.hero-data-item .label {
  font-size: 0.9rem;
  color: rgba(255, 255, 255, 0.65);
  letter-spacing: 0.03em;
}

.hero-data-item .value {
  font-size: 1.05rem;
  font-weight: 600;
  color: #fff;
  letter-spacing: 0.04em;
}

.hero-data-note {
  font-size: 0.78rem;
  color: rgba(255, 255, 255, 0.4);
  margin-top: 14px;
  letter-spacing: 0.02em;
}

/* Section */
.section {
  padding: var(--section-gap) 0;
}

.section--tight {
  padding: 48px 0;
}

.section--bg-light {
  background-color: var(--primary-bg);
}

.section--bg-white {
  background-color: var(--card-bg);
}

.section-header {
  margin-bottom: 44px;
}

.section-header h2 {
  font-size: 2rem;
  font-weight: 500;
  color: var(--text-primary);
  letter-spacing: 0.03em;
  line-height: 1.3;
  margin-bottom: 14px;
}

.section-header p {
  font-size: 1.03rem;
  color: var(--text-muted);
  max-width: 680px;
  line-height: 1.8;
}

.section-tag {
  display: inline-block;
  font-size: 0.8rem;
  color: var(--primary);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: 10px;
  font-weight: 500;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0 24px;
  height: 48px;
  border-radius: var(--radius-sm);
  font-size: 0.95rem;
  font-weight: 500;
  letter-spacing: 0.03em;
  transition: var(--transition);
  white-space: nowrap;
  line-height: 1;
  gap: 8px;
}

.btn-primary {
  background-color: var(--text-primary);
  color: #fff;
  box-shadow: var(--shadow-sm);
}

.btn-primary:hover {
  background-color: var(--primary-dark);
  color: #fff;
  box-shadow: var(--shadow-md);
  transform: translateY(-1px);
}

.btn-primary:active {
  transform: translateY(0);
  box-shadow: var(--shadow-sm);
}

.btn-primary:focus-visible {
  outline: 3px solid rgba(107, 125, 142, 0.35);
  outline-offset: 2px;
}

.btn-secondary {
  background-color: transparent;
  color: var(--text-primary);
  border: 1px solid var(--border);
}

.btn-secondary:hover {
  background-color: var(--primary-bg);
  border-color: var(--primary-light);
  color: var(--primary-dark);
}

.btn-secondary:active {
  background-color: var(--border-light);
}

.btn-secondary:focus-visible {
  outline: 3px solid rgba(107, 125, 142, 0.35);
  outline-offset: 2px;
}

.btn-small {
  height: 40px;
  padding: 0 18px;
  font-size: 0.88rem;
}

.text-link {
  color: var(--text-primary);
  font-weight: 500;
  border-bottom: 1px solid var(--accent-light);
  padding-bottom: 2px;
  transition: var(--transition);
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.text-link:hover {
  color: var(--primary);
  border-bottom-color: var(--primary-light);
}

/* Overview */
.overview-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: start;
}

.overview-text h2 {
  font-size: 1.8rem;
  font-weight: 500;
  color: var(--text-primary);
  letter-spacing: 0.03em;
  line-height: 1.35;
  margin-bottom: 16px;
}

.overview-text p {
  font-size: 1rem;
  color: var(--text-secondary);
  line-height: 1.85;
  margin-bottom: 14px;
}

.overview-side {
  background: var(--card-bg);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  padding: 24px 26px;
  box-shadow: var(--shadow-sm);
}

.overview-side h3 {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 14px;
  letter-spacing: 0.03em;
}

.overview-side ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.overview-side ul li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

.overview-side ul li::before {
  content: '';
  flex-shrink: 0;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent);
  margin-top: 10px;
}

/* Gallery Grid */
.gallery-grid {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: 22px;
}

.gallery-item {
  grid-column: span 4;
  background: var(--card-bg);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
  display: flex;
  flex-direction: column;
}

.gallery-item:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-3px);
}

.gallery-item--wide {
  grid-column: span 8;
  flex-direction: row;
  align-items: stretch;
}

.gallery-item--wide .gallery-img {
  width: 55%;
  flex-shrink: 0;
  min-height: 100%;
}

.gallery-item--wide .gallery-body {
  padding: 26px 28px;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.gallery-img {
  position: relative;
  aspect-ratio: 4 / 3;
  overflow: hidden;
  background: var(--primary-bg);
}

.gallery-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

.gallery-item:hover .gallery-img img {
  transform: scale(1.03);
}

.gallery-body {
  padding: 20px 22px 22px;
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.gallery-body .tag {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--primary);
  margin-bottom: 6px;
}

.gallery-body h3 {
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--text-primary);
  letter-spacing: 0.02em;
  margin-bottom: 8px;
  line-height: 1.4;
}

.gallery-body p {
  font-size: 0.93rem;
  color: var(--text-muted);
  line-height: 1.7;
}

/* Process */
.process-steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  counter-reset: step;
}

.process-step {
  background: var(--card-bg);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  padding: 26px 24px;
  position: relative;
  counter-increment: step;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
}

.process-step:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.process-step::before {
  content: '0' counter(step);
  display: block;
  font-size: 1.4rem;
  font-weight: 600;
  color: var(--accent);
  letter-spacing: 0.1em;
  margin-bottom: 12px;
  font-family: 'SF Mono', 'Menlo', monospace;
}

.process-step h3 {
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 8px;
  letter-spacing: 0.02em;
}

.process-step p {
  font-size: 0.9rem;
  color: var(--text-muted);
  line-height: 1.7;
}

/* FAQ */
.faq-list {
  display: flex;
  flex-direction: column;
  gap: 0;
  border-top: 1px solid var(--border);
}

.faq-item {
  border-bottom: 1px solid var(--border);
}

.faq-question {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 20px 4px;
  text-align: left;
  font-size: 1rem;
  font-weight: 500;
  color: var(--text-primary);
  letter-spacing: 0.02em;
  transition: var(--transition);
}

.faq-question:hover {
  color: var(--primary-dark);
}

.faq-question .faq-index {
  font-size: 0.82rem;
  color: var(--text-light);
  font-weight: 500;
  letter-spacing: 0.06em;
  flex-shrink: 0;
}

.faq-question .faq-icon {
  flex-shrink: 0;
  width: 24px;
  height: 24px;
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
}

.faq-question .faq-icon::before,
.faq-question .faq-icon::after {
  content: '';
  position: absolute;
  background: var(--text-muted);
  transition: var(--transition);
}

.faq-question .faq-icon::before {
  width: 14px;
  height: 1.5px;
}

.faq-question .faq-icon::after {
  width: 1.5px;
  height: 14px;
}

.faq-item.open .faq-question .faq-icon::after {
  transform: rotate(90deg);
  opacity: 0;
}

.faq-item.open .faq-question {
  color: var(--primary-dark);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94), padding 0.3s ease;
  padding: 0 4px;
}

.faq-item.open .faq-answer {
  max-height: 400px;
  padding: 0 4px 20px;
}

.faq-answer p {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.8;
  padding-left: 28px;
}

/* CTA / Contact */
.contact-section {
  background: var(--primary-bg);
}

.contact-grid {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 48px;
  align-items: start;
}

.contact-info h2 {
  font-size: 1.8rem;
  font-weight: 500;
  color: var(--text-primary);
  letter-spacing: 0.03em;
  line-height: 1.35;
  margin-bottom: 14px;
}

.contact-info p {
  font-size: 1rem;
  color: var(--text-muted);
  line-height: 1.8;
  margin-bottom: 20px;
}

.contact-info-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.contact-info-list li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 0.93rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

.contact-info-list li::before {
  content: '';
  flex-shrink: 0;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--primary);
  margin-top: 9px;
}

.contact-form {
  background: var(--card-bg);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  padding: 28px 30px;
  box-shadow: var(--shadow-sm);
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin-bottom: 16px;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.form-group label {
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text-secondary);
  letter-spacing: 0.02em;
}

.form-group label .required {
  color: var(--primary);
  margin-left: 2px;
}

.form-group input,
.form-group select,
.form-group textarea {
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 11px 14px;
  font-size: 0.92rem;
  color: var(--text-primary);
  background: #fff;
  transition: var(--transition);
  outline: none;
  width: 100%;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(107, 125, 142, 0.15);
}

.form-group input::placeholder,
.form-group textarea::placeholder {
  color: var(--text-light);
}

.form-group textarea {
  min-height: 110px;
  resize: vertical;
}

.form-submit {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-top: 6px;
}

.form-submit .btn {
  min-width: 140px;
}

.form-hint {
  font-size: 0.82rem;
  color: var(--text-muted);
  line-height: 1.6;
}

/* CTA Bottom */
.cta-bottom {
  background: var(--footer-bg);
  color: #fff;
  padding: 56px 0;
  text-align: center;
}

.cta-bottom h2 {
  font-size: 1.7rem;
  font-weight: 500;
  letter-spacing: 0.04em;
  color: #fff;
  margin-bottom: 12px;
}

.cta-bottom p {
  font-size: 1rem;
  color: rgba(255, 255, 255, 0.7);
  max-width: 520px;
  margin: 0 auto 24px;
  line-height: 1.8;
}

.cta-bottom .btn-primary {
  background: #fff;
  color: var(--text-primary);
}

.cta-bottom .btn-primary:hover {
  background: var(--accent-light);
  color: var(--text-primary);
  box-shadow: var(--shadow-lg);
  transform: translateY(-1px);
}

/* Footer */
.footer {
  background: var(--footer-bg);
  color: var(--footer-text);
  padding: 56px 0 28px;
  font-size: 0.88rem;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.6fr 1fr 1fr 0.8fr;
  gap: 36px;
  margin-bottom: 36px;
}

.footer-brand .logo {
  font-size: 1.25rem;
  color: #fff;
  margin-bottom: 14px;
}

.footer-brand .logo:hover {
  color: var(--accent-light);
}

.footer-brand .logo-mark {
  background: #fff;
  color: var(--text-primary);
}

.footer-brand p {
  font-size: 0.86rem;
  line-height: 1.7;
  color: rgba(255, 255, 255, 0.55);
  max-width: 300px;
}

.footer-col h4 {
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.75);
  margin-bottom: 14px;
}

.footer-col a {
  display: block;
  font-size: 0.88rem;
  color: rgba(255, 255, 255, 0.55);
  padding: 4px 0;
  transition: var(--transition);
}

.footer-col a:hover {
  color: #fff;
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding-top: 20px;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  font-size: 0.8rem;
  color: rgba(255, 255, 255, 0.45);
}

.footer-bottom-links {
  display: flex;
  gap: 16px;
}

.footer-bottom-links a {
  color: rgba(255, 255, 255, 0.45);
  transition: var(--transition);
}

.footer-bottom-links a:hover {
  color: #fff;
}

/* Mobile Menu */
.mobile-menu-overlay {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.4);
  z-index: 998;
  opacity: 0;
  transition: opacity 0.3s ease;
}

.mobile-menu-overlay.open {
  opacity: 1;
}

.mobile-menu-panel {
  display: none;
  position: fixed;
  top: 0;
  right: -320px;
  width: 300px;
  height: 100vh;
  background: #fff;
  z-index: 999;
  padding: 24px;
  transition: right 0.35s cubic-bezier(0.25, 0.46, 0.45, 0.94);
  overflow-y: auto;
}

.mobile-menu-panel.open {
  right: 0;
}

.mobile-menu-panel .mobile-close {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border-radius: var(--radius-sm);
  background: var(--primary-bg);
  color: var(--text-primary);
  font-size: 1.2rem;
  margin-bottom: 20px;
  transition: var(--transition);
}

.mobile-menu-panel .mobile-close:hover {
  background: var(--border-light);
}

.mobile-menu-panel .nav-links-mobile {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.mobile-menu-panel .nav-links-mobile a {
  display: block;
  padding: 12px 14px;
  font-size: 1rem;
  font-weight: 500;
  color: var(--text-secondary);
  border-radius: var(--radius-sm);
  transition: var(--transition);
}

.mobile-menu-panel .nav-links-mobile a:hover {
  background: var(--primary-bg);
  color: var(--primary-dark);
}

.mobile-menu-panel .nav-links-mobile a.active {
  background: var(--primary-bg);
  color: var(--text-primary);
  font-weight: 600;
}

.mobile-menu-panel .mobile-lang {
  display: flex;
  align-items: center;
  gap: 8px;
  margin: 20px 0;
  padding: 0 14px;
}

.mobile-menu-panel .mobile-lang button {
  padding: 6px 16px;
  font-size: 0.85rem;
  font-weight: 500;
  border-radius: var(--radius-full);
  background: var(--border-light);
  color: var(--text-muted);
  transition: var(--transition);
}

.mobile-menu-panel .mobile-lang button.active {
  background: var(--text-primary);
  color: #fff;
}

.mobile-menu-panel .mobile-cta {
  display: block;
  width: 100%;
  margin-top: 8px;
  height: 48px;
  background: var(--text-primary);
  color: #fff;
  border-radius: var(--radius-sm);
  font-weight: 500;
  text-align: center;
  line-height: 48px;
  transition: var(--transition);
}

.mobile-menu-panel .mobile-cta:hover {
  background: var(--primary-dark);
  color: #fff;
}

/* Responsive */
@media (max-width: 1199px) {
  .container {
    padding: 0 28px;
  }
  .hero-dark-grid {
    grid-template-columns: 1fr 0.8fr;
    gap: 36px;
  }
  .hero-dark h1 {
    font-size: 2.3rem;
  }
  .gallery-item--wide {
    grid-column: span 7;
    flex-direction: column;
  }
  .gallery-item--wide .gallery-img {
    width: 100%;
    min-height: auto;
    aspect-ratio: 16 / 9;
  }
  .gallery-item--wide .gallery-body {
    padding: 20px 22px 22px;
  }
  .process-steps {
    grid-template-columns: repeat(2, 1fr);
  }
  .footer-grid {
    grid-template-columns: 1.4fr 1fr 1fr;
  }
  .footer-col:last-child {
    grid-column: span 3;
  }
}

@media (max-width: 991px) {
  .nav-links {
    display: none;
  }
  .hamburger {
    display: flex;
  }
  .nav-cta {
    display: none;
  }
  .lang-switch {
    display: none;
  }
  .mobile-menu-overlay {
    display: block;
  }
  .mobile-menu-panel {
    display: block;
  }
  .hero-dark-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }
  .hero-dark h1 {
    font-size: 2rem;
  }
  .overview-grid {
    grid-template-columns: 1fr;
    gap: 28px;
  }
  .gallery-item {
    grid-column: span 6;
  }
  .gallery-item--wide {
    grid-column: span 12;
    flex-direction: row;
  }
  .gallery-item--wide .gallery-img {
    width: 50%;
    min-height: 100%;
    aspect-ratio: auto;
  }
  .contact-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }
}

@media (max-width: 767px) {
  :root {
    --header-height: 60px;
    --section-gap: 56px;
  }
  .container {
    padding: 0 20px;
  }
  .header-inner {
    padding: 0 20px;
  }
  .hero-dark {
    padding-top: calc(var(--header-height) + 36px);
    padding-bottom: 48px;
  }
  .hero-dark h1 {
    font-size: 1.7rem;
  }
  .hero-dark .hero-sub {
    font-size: 0.98rem;
  }
  .hero-dark-actions {
    flex-direction: column;
    align-items: flex-start;
  }
  .hero-dark-actions .btn {
    width: 100%;
  }
  .hero-data-panel {
    padding: 20px 18px 16px;
  }
  .section-header h2 {
    font-size: 1.6rem;
  }
  .gallery-grid {
    gap: 16px;
  }
  .gallery-item {
    grid-column: span 12;
  }
  .gallery-item--wide {
    grid-column: span 12;
    flex-direction: column;
  }
  .gallery-item--wide .gallery-img {
    width: 100%;
    min-height: auto;
    aspect-ratio: 16 / 10;
  }
  .gallery-item--wide .gallery-body {
    padding: 18px 18px 20px;
  }
  .process-steps {
    grid-template-columns: 1fr;
    gap: 14px;
  }
  .form-row {
    grid-template-columns: 1fr;
    gap: 12px;
  }
  .contact-form {
    padding: 20px 18px;
  }
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 24px;
  }
  .footer-col:last-child {
    grid-column: span 1;
  }
  .footer-bottom {
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
  }
  .footer-bottom-links {
    flex-wrap: wrap;
    gap: 12px;
  }
  .cta-bottom h2 {
    font-size: 1.4rem;
  }
}

@media (max-width: 420px) {
  .logo {
    font-size: 1.15rem;
  }
  .logo-mark {
    width: 30px;
    height: 30px;
    font-size: 0.8rem;
    border-radius: 6px;
  }
  .hero-dark h1 {
    font-size: 1.45rem;
    letter-spacing: 0.01em;
  }
  .section-header h2 {
    font-size: 1.35rem;
  }
  .hero-data-item .label {
    font-size: 0.8rem;
  }
  .hero-data-item .value {
    font-size: 0.92rem;
  }
}