/* roulang page: index */
:root {
            --color-primary: #0d1b3e;
            --color-primary-light: #152652;
            --color-accent: #ff5722;
            --color-accent-hover: #e64a19;
            --color-gold: #ffc107;
            --color-gold-light: #ffd54f;
            --color-bg: #f5f6fa;
            --color-white: #ffffff;
            --color-text: #1a1a2e;
            --color-text-light: #5a5f7a;
            --color-text-muted: #8b8fa3;
            --color-border: #e2e5ee;
            --color-dark-block: #080f25;
            --color-dark-block-alt: #0c1535;
            --color-glass-bg: rgba(13, 27, 62, 0.72);
            --color-glass-border: rgba(255, 255, 255, 0.18);
            --radius-sm: 8px;
            --radius-md: 14px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --shadow-sm: 0 2px 8px rgba(13, 27, 62, 0.06);
            --shadow-md: 0 6px 24px rgba(13, 27, 62, 0.10);
            --shadow-lg: 0 14px 44px rgba(13, 27, 62, 0.14);
            --shadow-xl: 0 22px 60px rgba(13, 27, 62, 0.18);
            --transition-fast: 0.18s ease;
            --transition-base: 0.28s ease;
            --transition-slow: 0.40s ease;
            --font-heading: -apple-system, BlinkMacSystemFont, 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', sans-serif;
            --font-body: -apple-system, BlinkMacSystemFont, 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', sans-serif;
            --max-width: 1240px;
            --nav-height: 68px;
        }

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

        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        body {
            margin: 0;
            padding: 0;
            font-family: var(--font-body);
            font-size: 16px;
            line-height: 1.7;
            color: var(--color-text);
            background-color: var(--color-bg);
            overflow-x: hidden;
        }

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

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

        button {
            cursor: pointer;
            font-family: inherit;
            border: none;
            outline: none;
        }

        button:focus-visible,
        a:focus-visible {
            outline: 2px solid var(--color-accent);
            outline-offset: 3px;
            border-radius: 4px;
        }

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

        /* ========== HEADER / NAV ========== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            height: var(--nav-height);
            background: var(--color-glass-bg);
            backdrop-filter: blur(22px);
            -webkit-backdrop-filter: blur(22px);
            border-bottom: 1px solid var(--color-glass-border);
            transition: background var(--transition-base), box-shadow var(--transition-base);
        }

        .site-header.scrolled {
            background: rgba(13, 27, 62, 0.94);
            box-shadow: 0 4px 28px rgba(0, 0, 0, 0.18);
            border-bottom: 1px solid rgba(255, 255, 255, 0.10);
        }

        .site-header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 100%;
        }

        .site-logo {
            font-family: var(--font-heading);
            font-size: 1.35rem;
            font-weight: 700;
            color: #ffffff;
            letter-spacing: 0.02em;
            white-space: nowrap;
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .site-logo .logo-icon {
            width: 36px;
            height: 36px;
            background: var(--color-accent);
            border-radius: var(--radius-sm);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.1rem;
            color: #fff;
            flex-shrink: 0;
        }

        .main-nav {
            display: flex;
            align-items: center;
            gap: 6px;
            list-style: none;
            margin: 0;
            padding: 0;
        }

        .main-nav li {
            margin: 0;
            padding: 0;
        }

        .main-nav a {
            display: inline-flex;
            align-items: center;
            padding: 8px 18px;
            border-radius: 24px;
            font-size: 0.95rem;
            font-weight: 500;
            color: rgba(255, 255, 255, 0.88);
            transition: all var(--transition-fast);
            white-space: nowrap;
        }

        .main-nav a:hover {
            color: #ffffff;
            background: rgba(255, 255, 255, 0.10);
        }

        .main-nav a.active {
            color: #ffffff;
            background: var(--color-accent);
            font-weight: 600;
        }

        .nav-toggle {
            display: none;
            background: none;
            border: none;
            color: #ffffff;
            font-size: 1.5rem;
            padding: 6px 10px;
            border-radius: 6px;
            transition: background var(--transition-fast);
        }

        .nav-toggle:hover {
            background: rgba(255, 255, 255, 0.12);
        }

        /* ========== HERO ========== */
        .hero-section {
            position: relative;
            min-height: 100vh;
            display: flex;
            align-items: center;
            justify-content: center;
            padding-top: var(--nav-height);
            background: url('/assets/images/backpic/back-1.webp') center center / cover no-repeat;
            background-attachment: fixed;
            overflow: hidden;
        }

        .hero-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, rgba(8, 15, 37, 0.78) 0%, rgba(13, 27, 62, 0.88) 50%, rgba(8, 15, 37, 0.95) 100%);
            z-index: 1;
        }

        .hero-content {
            position: relative;
            z-index: 2;
            text-align: center;
            max-width: 820px;
            margin: 0 auto;
            padding: 50px 24px;
        }

        .hero-badge {
            display: inline-block;
            padding: 6px 16px;
            background: rgba(255, 87, 34, 0.22);
            border: 1px solid rgba(255, 87, 34, 0.40);
            border-radius: 24px;
            color: var(--color-gold-light);
            font-size: 0.88rem;
            font-weight: 500;
            letter-spacing: 0.03em;
            margin-bottom: 22px;
        }

        .hero-content h1 {
            font-family: var(--font-heading);
            font-size: 3rem;
            font-weight: 700;
            color: #ffffff;
            line-height: 1.25;
            margin: 0 0 20px 0;
            letter-spacing: 0.01em;
        }

        .hero-content h1 .highlight {
            color: var(--color-gold);
        }

        .hero-subtitle {
            font-size: 1.18rem;
            color: rgba(255, 255, 255, 0.78);
            line-height: 1.65;
            margin: 0 0 34px 0;
            max-width: 620px;
            margin-left: auto;
            margin-right: auto;
        }

        .hero-actions {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 16px;
            flex-wrap: wrap;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 13px 28px;
            border-radius: 28px;
            font-size: 1rem;
            font-weight: 600;
            letter-spacing: 0.02em;
            transition: all var(--transition-base);
            text-align: center;
            white-space: nowrap;
        }

        .btn-primary {
            background: var(--color-accent);
            color: #ffffff;
            box-shadow: 0 6px 22px rgba(255, 87, 34, 0.35);
        }

        .btn-primary:hover {
            background: var(--color-accent-hover);
            box-shadow: 0 10px 32px rgba(255, 87, 34, 0.48);
            transform: translateY(-2px);
            color: #ffffff;
        }

        .btn-outline {
            background: transparent;
            color: #ffffff;
            border: 2px solid rgba(255, 255, 255, 0.40);
        }

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

        .hero-stats-row {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 48px;
            margin-top: 44px;
            flex-wrap: wrap;
        }

        .hero-stat {
            text-align: center;
        }

        .hero-stat .stat-number {
            font-family: var(--font-heading);
            font-size: 2.2rem;
            font-weight: 700;
            color: var(--color-gold);
            line-height: 1.1;
        }

        .hero-stat .stat-label {
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.65);
            margin-top: 4px;
        }

        /* ========== SECTION COMMON ========== */
        .section {
            padding: 80px 0;
        }

        .section-header {
            text-align: center;
            margin-bottom: 50px;
        }

        .section-label {
            display: inline-block;
            font-size: 0.82rem;
            font-weight: 600;
            letter-spacing: 0.06em;
            text-transform: uppercase;
            color: var(--color-accent);
            margin-bottom: 10px;
        }

        .section-title {
            font-family: var(--font-heading);
            font-size: 2.2rem;
            font-weight: 700;
            color: var(--color-primary);
            margin: 0 0 14px 0;
            line-height: 1.3;
        }

        .section-desc {
            font-size: 1.05rem;
            color: var(--color-text-light);
            max-width: 600px;
            margin: 0 auto;
            line-height: 1.65;
        }

        /* ========== SERVICES CARDS ========== */
        .services-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }

        .service-card {
            background: var(--color-white);
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            transition: all var(--transition-base);
            display: flex;
            flex-direction: column;
        }

        .service-card:hover {
            box-shadow: var(--shadow-lg);
            transform: translateY(-6px);
        }

        .service-card-img {
            width: 100%;
            height: 200px;
            object-fit: cover;
        }

        .service-card-body {
            padding: 24px 22px 28px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }

        .service-card-body h3 {
            font-family: var(--font-heading);
            font-size: 1.2rem;
            font-weight: 700;
            color: var(--color-primary);
            margin: 0 0 10px 0;
        }

        .service-card-body p {
            font-size: 0.95rem;
            color: var(--color-text-light);
            line-height: 1.6;
            margin: 0 0 16px 0;
            flex: 1;
        }

        .service-card-link {
            font-size: 0.9rem;
            font-weight: 600;
            color: var(--color-accent);
            display: inline-flex;
            align-items: center;
            gap: 6px;
            transition: gap var(--transition-fast);
        }

        .service-card-link:hover {
            gap: 10px;
            color: var(--color-accent-hover);
        }

        /* ========== STATS BANNER ========== */
        .stats-banner {
            background: var(--color-dark-block);
            padding: 60px 0;
            position: relative;
            overflow: hidden;
        }

        .stats-banner::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
            opacity: 0.10;
            z-index: 0;
        }

        .stats-banner .container {
            position: relative;
            z-index: 1;
        }

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

        .stat-card {
            padding: 20px;
        }

        .stat-card .stat-icon {
            font-size: 2rem;
            color: var(--color-gold);
            margin-bottom: 12px;
        }

        .stat-card .stat-value {
            font-family: var(--font-heading);
            font-size: 2.8rem;
            font-weight: 700;
            color: #ffffff;
            line-height: 1.1;
        }

        .stat-card .stat-value span {
            color: var(--color-accent);
        }

        .stat-card .stat-title {
            font-size: 0.92rem;
            color: rgba(255, 255, 255, 0.68);
            margin-top: 8px;
        }

        /* ========== CMS LIST ========== */
        .cms-list-section {
            background: var(--color-white);
        }

        .cms-list-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 20px;
        }

        .cms-list-item {
            display: flex;
            gap: 18px;
            padding: 18px 20px;
            border-radius: var(--radius-md);
            border: 1px solid var(--color-border);
            background: #fafbfd;
            transition: all var(--transition-fast);
            align-items: flex-start;
        }

        .cms-list-item:hover {
            border-color: var(--color-accent);
            box-shadow: var(--shadow-md);
            background: #fff;
        }

        .cms-item-badge {
            flex-shrink: 0;
            display: inline-block;
            padding: 4px 12px;
            background: rgba(255, 87, 34, 0.10);
            color: var(--color-accent);
            border-radius: 14px;
            font-size: 0.78rem;
            font-weight: 600;
            white-space: nowrap;
            margin-top: 2px;
        }

        .cms-item-content {
            flex: 1;
            min-width: 0;
        }

        .cms-item-content h4 {
            font-family: var(--font-heading);
            font-size: 1.02rem;
            font-weight: 600;
            color: var(--color-primary);
            margin: 0 0 6px 0;
            line-height: 1.4;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .cms-item-content h4 a {
            color: inherit;
        }

        .cms-item-content h4 a:hover {
            color: var(--color-accent);
        }

        .cms-item-summary {
            font-size: 0.88rem;
            color: var(--color-text-light);
            line-height: 1.5;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            margin-bottom: 6px;
        }

        .cms-item-meta {
            font-size: 0.78rem;
            color: var(--color-text-muted);
            display: flex;
            gap: 12px;
            align-items: center;
        }

        .cms-empty {
            text-align: center;
            padding: 40px;
            color: var(--color-text-muted);
            font-size: 1rem;
            grid-column: 1 / -1;
        }

        /* ========== FEATURES ========== */
        .features-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 32px;
            align-items: center;
        }

        .feature-visual {
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-lg);
        }

        .feature-visual img {
            width: 100%;
            height: auto;
        }

        .feature-text h3 {
            font-family: var(--font-heading);
            font-size: 1.6rem;
            font-weight: 700;
            color: var(--color-primary);
            margin: 0 0 14px 0;
        }

        .feature-text p {
            font-size: 1rem;
            color: var(--color-text-light);
            line-height: 1.7;
            margin: 0 0 8px 0;
        }

        .feature-list {
            list-style: none;
            padding: 0;
            margin: 16px 0 0;
        }

        .feature-list li {
            padding: 8px 0 8px 26px;
            position: relative;
            font-size: 0.95rem;
            color: var(--color-text);
            line-height: 1.5;
        }

        .feature-list li::before {
            content: '';
            position: absolute;
            left: 0;
            top: 14px;
            width: 10px;
            height: 10px;
            background: var(--color-accent);
            border-radius: 50%;
            transform: translateY(-50%);
        }

        /* ========== ADVANTAGES ========== */
        .advantages-section {
            background: var(--color-dark-block-alt);
            position: relative;
        }

        .advantages-section .section-title {
            color: #ffffff;
        }

        .advantages-section .section-desc {
            color: rgba(255, 255, 255, 0.68);
        }

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

        .adv-card {
            background: rgba(255, 255, 255, 0.04);
            border: 1px solid rgba(255, 255, 255, 0.10);
            border-radius: var(--radius-lg);
            padding: 32px 26px;
            text-align: center;
            transition: all var(--transition-base);
        }

        .adv-card:hover {
            background: rgba(255, 255, 255, 0.08);
            border-color: rgba(255, 255, 255, 0.22);
            transform: translateY(-4px);
        }

        .adv-card .adv-icon {
            font-size: 2.4rem;
            color: var(--color-gold);
            margin-bottom: 14px;
        }

        .adv-card h3 {
            font-family: var(--font-heading);
            font-size: 1.15rem;
            font-weight: 700;
            color: #ffffff;
            margin: 0 0 10px 0;
        }

        .adv-card p {
            font-size: 0.9rem;
            color: rgba(255, 255, 255, 0.62);
            line-height: 1.55;
            margin: 0;
        }

        /* ========== FAQ ========== */
        .faq-list {
            max-width: 760px;
            margin: 0 auto;
        }

        .faq-item {
            border-bottom: 1px solid var(--color-border);
            padding: 22px 0;
        }

        .faq-item:first-child {
            border-top: 1px solid var(--color-border);
        }

        .faq-question {
            font-family: var(--font-heading);
            font-size: 1.08rem;
            font-weight: 600;
            color: var(--color-primary);
            cursor: pointer;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            user-select: none;
        }

        .faq-question .faq-icon {
            flex-shrink: 0;
            color: var(--color-accent);
            font-size: 1rem;
            transition: transform var(--transition-fast);
        }

        .faq-answer {
            font-size: 0.95rem;
            color: var(--color-text-light);
            line-height: 1.65;
            margin-top: 12px;
            display: none;
        }

        .faq-item.open .faq-answer {
            display: block;
        }

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

        /* ========== CTA ========== */
        .cta-section {
            background: linear-gradient(160deg, var(--color-primary) 0%, var(--color-primary-light) 50%, #0d1b3e 100%);
            padding: 70px 0;
            text-align: center;
            position: relative;
            overflow: hidden;
        }

        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-3.png') center center / cover no-repeat;
            opacity: 0.08;
            z-index: 0;
        }

        .cta-section .container {
            position: relative;
            z-index: 1;
        }

        .cta-section h2 {
            font-family: var(--font-heading);
            font-size: 2rem;
            font-weight: 700;
            color: #ffffff;
            margin: 0 0 14px 0;
        }

        .cta-section p {
            font-size: 1.05rem;
            color: rgba(255, 255, 255, 0.72);
            margin: 0 0 28px 0;
        }

        .cta-section .btn-primary {
            font-size: 1.05rem;
            padding: 15px 36px;
            border-radius: 30px;
        }

        /* ========== FOOTER ========== */
        .site-footer {
            background: #060d1f;
            padding: 48px 0 28px;
            color: rgba(255, 255, 255, 0.55);
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 36px;
        }

        .footer-brand .site-logo {
            margin-bottom: 12px;
        }

        .footer-brand p {
            font-size: 0.9rem;
            line-height: 1.6;
            color: rgba(255, 255, 255, 0.48);
            margin: 0;
        }

        .footer-col h4 {
            font-family: var(--font-heading);
            font-size: 0.95rem;
            font-weight: 600;
            color: rgba(255, 255, 255, 0.8);
            margin: 0 0 14px 0;
        }

        .footer-col ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }

        .footer-col ul li {
            margin-bottom: 8px;
        }

        .footer-col ul li a {
            font-size: 0.88rem;
            color: rgba(255, 255, 255, 0.50);
            transition: color var(--transition-fast);
        }

        .footer-col ul li a:hover {
            color: var(--color-gold);
        }

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            padding-top: 20px;
            text-align: center;
            font-size: 0.82rem;
            color: rgba(255, 255, 255, 0.35);
        }

        /* ========== RESPONSIVE ========== */
        @media (max-width: 1024px) {
            .services-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 20px;
            }
            .adv-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .features-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .feature-visual {
                max-width: 500px;
                margin: 0 auto;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 28px;
            }
            .hero-content h1 {
                font-size: 2.4rem;
            }
        }

        @media (max-width: 768px) {
            :root {
                --nav-height: 58px;
            }
            .site-header .container {
                padding-left: 16px;
                padding-right: 16px;
            }
            .main-nav {
                display: none;
                position: absolute;
                top: var(--nav-height);
                left: 0;
                right: 0;
                background: rgba(13, 27, 62, 0.97);
                backdrop-filter: blur(18px);
                -webkit-backdrop-filter: blur(18px);
                flex-direction: column;
                padding: 12px 16px;
                gap: 4px;
                border-bottom: 1px solid rgba(255, 255, 255, 0.12);
                box-shadow: 0 8px 30px rgba(0, 0, 0, 0.28);
            }
            .main-nav.open {
                display: flex;
            }
            .main-nav a {
                width: 100%;
                padding: 12px 16px;
                border-radius: 10px;
                font-size: 1rem;
            }
            .nav-toggle {
                display: block;
            }
            .services-grid {
                grid-template-columns: 1fr;
                max-width: 440px;
                margin: 0 auto;
            }
            .cms-list-grid {
                grid-template-columns: 1fr;
            }
            .adv-grid {
                grid-template-columns: 1fr;
                max-width: 400px;
                margin: 0 auto;
            }
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 16px;
            }
            .stat-card .stat-value {
                font-size: 2rem;
            }
            .hero-content h1 {
                font-size: 1.9rem;
            }
            .hero-subtitle {
                font-size: 1rem;
            }
            .hero-stats-row {
                gap: 24px;
            }
            .hero-stat .stat-number {
                font-size: 1.6rem;
            }
            .section {
                padding: 56px 0;
            }
            .section-title {
                font-size: 1.7rem;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .cta-section h2 {
                font-size: 1.5rem;
            }
        }

        @media (max-width: 520px) {
            .hero-content h1 {
                font-size: 1.55rem;
            }
            .hero-subtitle {
                font-size: 0.9rem;
            }
            .hero-actions {
                flex-direction: column;
                gap: 10px;
            }
            .hero-actions .btn {
                width: 100%;
                justify-content: center;
            }
            .hero-stats-row {
                gap: 16px;
            }
            .hero-stat .stat-number {
                font-size: 1.3rem;
            }
            .hero-stat .stat-label {
                font-size: 0.75rem;
            }
            .stats-grid {
                grid-template-columns: 1fr 1fr;
                gap: 12px;
            }
            .stat-card .stat-value {
                font-size: 1.6rem;
            }
            .section-title {
                font-size: 1.4rem;
            }
            .cms-list-item {
                flex-direction: column;
                gap: 10px;
            }
            .container {
                padding-left: 14px;
                padding-right: 14px;
            }
        }

/* roulang page: category1 */
:root {
            --color-primary: #e63946;
            --color-primary-dark: #c1121f;
            --color-primary-light: #ff6b6b;
            --color-secondary: #1d3557;
            --color-secondary-light: #2a4a7f;
            --color-accent: #f4a261;
            --color-accent-dark: #e76f51;
            --color-bg: #f8f9fa;
            --color-bg-dark: #0d1b2a;
            --color-bg-card: #ffffff;
            --color-text: #1a1a2e;
            --color-text-light: #4a4a5a;
            --color-text-muted: #7a7a8a;
            --color-text-on-dark: #e8e8f0;
            --color-border: #e0e0e8;
            --color-border-light: #f0f0f5;
            --color-success: #2ecc71;
            --color-warning: #f39c12;
            --radius-sm: 8px;
            --radius-md: 14px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.06);
            --shadow-md: 0 6px 24px rgba(0, 0, 0, 0.10);
            --shadow-lg: 0 14px 40px rgba(0, 0, 0, 0.14);
            --shadow-xl: 0 22px 56px rgba(0, 0, 0, 0.18);
            --transition-fast: 0.18s ease;
            --transition-normal: 0.28s ease;
            --transition-slow: 0.40s ease;
        }

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

        html {
            scroll-behavior: smooth;
            font-size: 16px;
        }

        body {
            font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', sans-serif;
            line-height: 1.68;
            color: var(--color-text);
            background: var(--color-bg);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            overflow-x: hidden;
        }

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

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

        button {
            cursor: pointer;
            font-family: inherit;
            border: none;
            background: none;
        }

        ul {
            list-style: none;
        }

        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }

        /* ========== HEADER / NAV ========== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            padding: 0;
            background: rgba(255, 255, 255, 0.82);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            border-bottom: 1px solid rgba(200, 200, 210, 0.35);
            box-shadow: 0 1px 12px rgba(0, 0, 0, 0.06);
            transition: all var(--transition-normal);
        }

        .site-header.scrolled {
            background: rgba(255, 255, 255, 0.96);
            backdrop-filter: blur(22px);
            -webkit-backdrop-filter: blur(22px);
            border-bottom-color: rgba(180, 180, 195, 0.50);
            box-shadow: 0 2px 20px rgba(0, 0, 0, 0.10);
        }

        .site-header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 64px;
            gap: 24px;
        }

        .site-logo {
            display: flex;
            align-items: center;
            gap: 9px;
            font-size: 1.25rem;
            font-weight: 700;
            color: var(--color-secondary);
            white-space: nowrap;
            letter-spacing: -0.01em;
            transition: opacity var(--transition-fast);
        }

        .site-logo:hover {
            opacity: 0.82;
        }

        .logo-icon {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 38px;
            height: 38px;
            border-radius: var(--radius-sm);
            background: linear-gradient(135deg, var(--color-primary), var(--color-accent-dark));
            color: #fff;
            font-size: 1rem;
            flex-shrink: 0;
        }

        .main-nav {
            display: flex;
            align-items: center;
            gap: 6px;
            margin: 0;
            list-style: none;
        }

        .main-nav li a {
            display: inline-flex;
            align-items: center;
            padding: 8px 16px;
            border-radius: 20px;
            font-size: 0.93rem;
            font-weight: 500;
            color: var(--color-text-light);
            transition: all var(--transition-fast);
            white-space: nowrap;
            position: relative;
        }

        .main-nav li a:hover {
            color: var(--color-primary);
            background: rgba(230, 57, 70, 0.06);
        }

        .main-nav li a.active {
            color: #fff;
            background: var(--color-primary);
            font-weight: 600;
            box-shadow: 0 3px 12px rgba(230, 57, 70, 0.30);
        }

        .nav-toggle {
            display: none;
            font-size: 1.4rem;
            color: var(--color-secondary);
            padding: 8px 10px;
            border-radius: var(--radius-sm);
            transition: background var(--transition-fast);
        }

        .nav-toggle:hover {
            background: rgba(0, 0, 0, 0.04);
        }

        /* ========== HERO ========== */
        .page-hero {
            position: relative;
            min-height: 480px;
            display: flex;
            align-items: center;
            justify-content: center;
            text-align: center;
            margin-top: 64px;
            background: linear-gradient(160deg, #0d1b2a 0%, #1a3350 40%, #1d3557 70%, #0d1b2a 100%);
            overflow: hidden;
            padding: 80px 20px 70px;
        }

        .page-hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
            opacity: 0.28;
            z-index: 0;
        }

        .page-hero::after {
            content: '';
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at center, transparent 30%, rgba(13, 27, 42, 0.75) 100%);
            z-index: 0;
        }

        .page-hero .hero-content {
            position: relative;
            z-index: 1;
            max-width: 780px;
            margin: 0 auto;
        }

        .hero-badge {
            display: inline-block;
            padding: 6px 18px;
            border-radius: 22px;
            background: rgba(255, 255, 255, 0.10);
            border: 1px solid rgba(255, 255, 255, 0.22);
            color: #f0f0f5;
            font-size: 0.85rem;
            font-weight: 500;
            letter-spacing: 0.04em;
            margin-bottom: 20px;
            backdrop-filter: blur(6px);
        }

        .page-hero h1 {
            font-size: 2.8rem;
            font-weight: 800;
            color: #ffffff;
            letter-spacing: -0.02em;
            line-height: 1.22;
            margin-bottom: 18px;
            text-shadow: 0 2px 18px rgba(0, 0, 0, 0.35);
        }

        .page-hero h1 .highlight {
            background: linear-gradient(135deg, #ff6b6b, #f4a261);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .page-hero .hero-subtitle {
            font-size: 1.15rem;
            color: rgba(220, 220, 235, 0.88);
            line-height: 1.7;
            margin-bottom: 32px;
            max-width: 620px;
            margin-left: auto;
            margin-right: auto;
        }

        .btn-hero {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 14px 32px;
            border-radius: 28px;
            font-size: 1rem;
            font-weight: 600;
            background: var(--color-primary);
            color: #fff;
            box-shadow: 0 8px 28px rgba(230, 57, 70, 0.40);
            transition: all var(--transition-normal);
            letter-spacing: 0.02em;
        }

        .btn-hero:hover {
            background: var(--color-primary-dark);
            transform: translateY(-2px);
            box-shadow: 0 12px 36px rgba(230, 57, 70, 0.50);
            color: #fff;
        }

        .hero-stats-row {
            display: flex;
            justify-content: center;
            gap: 40px;
            margin-top: 44px;
            flex-wrap: wrap;
        }

        .hero-stat-item {
            text-align: center;
            min-width: 80px;
        }

        .hero-stat-number {
            font-size: 2rem;
            font-weight: 800;
            color: #fff;
            line-height: 1;
            letter-spacing: -0.01em;
        }

        .hero-stat-label {
            font-size: 0.8rem;
            color: rgba(200, 200, 215, 0.80);
            margin-top: 4px;
        }

        /* ========== SECTIONS ========== */
        .section {
            padding: 72px 20px;
        }

        .section-dark {
            background: var(--color-bg-dark);
            color: var(--color-text-on-dark);
        }

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

        .section-tag {
            display: inline-block;
            padding: 5px 16px;
            border-radius: 18px;
            background: rgba(230, 57, 70, 0.08);
            color: var(--color-primary);
            font-size: 0.82rem;
            font-weight: 600;
            letter-spacing: 0.03em;
            margin-bottom: 12px;
        }

        .section-dark .section-tag {
            background: rgba(255, 255, 255, 0.10);
            color: #f4a261;
        }

        .section-header h2 {
            font-size: 2rem;
            font-weight: 700;
            color: var(--color-text);
            letter-spacing: -0.01em;
            margin-bottom: 10px;
        }

        .section-dark .section-header h2 {
            color: #fff;
        }

        .section-header .section-desc {
            font-size: 1rem;
            color: var(--color-text-muted);
            max-width: 600px;
            margin: 0 auto;
            line-height: 1.6;
        }

        .section-dark .section-header .section-desc {
            color: rgba(200, 200, 215, 0.80);
        }

        /* ========== FEATURE CARDS ========== */
        .features-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
            max-width: 1080px;
            margin: 0 auto;
        }

        .feature-card {
            background: var(--color-bg-card);
            border-radius: var(--radius-lg);
            padding: 32px 26px;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--color-border-light);
            transition: all var(--transition-normal);
            position: relative;
            overflow: hidden;
        }

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

        .feature-card .card-icon-wrap {
            width: 52px;
            height: 52px;
            border-radius: var(--radius-md);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.35rem;
            margin-bottom: 18px;
            background: linear-gradient(135deg, rgba(230, 57, 70, 0.10), rgba(244, 162, 97, 0.12));
            color: var(--color-primary);
            flex-shrink: 0;
        }

        .feature-card h3 {
            font-size: 1.15rem;
            font-weight: 700;
            margin-bottom: 8px;
            color: var(--color-text);
            letter-spacing: -0.01em;
        }

        .feature-card p {
            font-size: 0.92rem;
            color: var(--color-text-light);
            line-height: 1.6;
            margin: 0;
        }

        .feature-card .card-metric {
            display: inline-block;
            margin-top: 14px;
            padding: 5px 12px;
            border-radius: 14px;
            font-size: 0.78rem;
            font-weight: 600;
            background: rgba(46, 204, 113, 0.10);
            color: #1e7e34;
        }

        /* ========== SCENARIO CARDS ========== */
        .scenario-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 24px;
            max-width: 960px;
            margin: 0 auto;
        }

        .scenario-card {
            background: var(--color-bg-card);
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--color-border-light);
            display: flex;
            transition: all var(--transition-normal);
        }

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

        .scenario-card .sc-img {
            width: 160px;
            flex-shrink: 0;
            min-height: 180px;
            object-fit: cover;
        }

        .scenario-card .sc-body {
            padding: 22px 20px;
            display: flex;
            flex-direction: column;
            justify-content: center;
        }

        .scenario-card h3 {
            font-size: 1.08rem;
            font-weight: 700;
            margin-bottom: 6px;
            color: var(--color-text);
        }

        .scenario-card p {
            font-size: 0.88rem;
            color: var(--color-text-light);
            line-height: 1.55;
            margin: 0;
        }

        /* ========== DATA FLOW / PROCESS ========== */
        .process-flow {
            display: flex;
            align-items: flex-start;
            justify-content: center;
            gap: 0;
            max-width: 960px;
            margin: 0 auto;
            flex-wrap: wrap;
        }

        .process-step {
            flex: 1;
            min-width: 140px;
            text-align: center;
            padding: 20px 12px;
            position: relative;
        }

        .process-step::after {
            content: '';
            position: absolute;
            top: 44px;
            right: -8px;
            width: 28px;
            height: 2px;
            background: rgba(255, 255, 255, 0.30);
            border-radius: 2px;
        }

        .process-step:last-child::after {
            display: none;
        }

        .process-icon-circle {
            width: 64px;
            height: 64px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.5rem;
            margin: 0 auto 14px;
            background: rgba(255, 255, 255, 0.10);
            color: #fff;
            border: 2px solid rgba(255, 255, 255, 0.25);
            transition: all var(--transition-normal);
        }

        .process-step:hover .process-icon-circle {
            background: var(--color-primary);
            border-color: var(--color-primary);
            box-shadow: 0 8px 28px rgba(230, 57, 70, 0.45);
            transform: scale(1.06);
        }

        .process-step h4 {
            font-size: 0.95rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 4px;
        }

        .process-step p {
            font-size: 0.80rem;
            color: rgba(200, 200, 215, 0.75);
            margin: 0;
            line-height: 1.5;
        }

        /* ========== STATS BAR ========== */
        .stats-bar-wrap {
            max-width: 900px;
            margin: 0 auto;
            display: flex;
            gap: 30px;
            justify-content: center;
            flex-wrap: wrap;
        }

        .stat-bar-item {
            text-align: center;
            flex: 1;
            min-width: 120px;
        }

        .stat-bar-value {
            font-size: 2.6rem;
            font-weight: 800;
            color: var(--color-primary);
            letter-spacing: -0.02em;
            line-height: 1;
        }

        .stat-bar-value span {
            font-size: 1.2rem;
            font-weight: 600;
        }

        .stat-bar-label {
            font-size: 0.9rem;
            color: var(--color-text-muted);
            margin-top: 6px;
        }

        /* ========== FAQ ========== */
        .faq-list {
            max-width: 760px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 14px;
        }

        .faq-item {
            background: var(--color-bg-card);
            border-radius: var(--radius-md);
            border: 1px solid var(--color-border-light);
            overflow: hidden;
            transition: all var(--transition-fast);
        }

        .faq-item:hover {
            border-color: var(--color-border);
            box-shadow: var(--shadow-sm);
        }

        .faq-question {
            width: 100%;
            text-align: left;
            padding: 18px 22px;
            font-size: 1rem;
            font-weight: 600;
            color: var(--color-text);
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 12px;
            background: transparent;
            transition: background var(--transition-fast);
        }

        .faq-question:hover {
            background: rgba(0, 0, 0, 0.015);
        }

        .faq-question i {
            font-size: 0.85rem;
            color: var(--color-text-muted);
            transition: transform var(--transition-fast);
        }

        .faq-answer {
            padding: 0 22px 18px;
            font-size: 0.92rem;
            color: var(--color-text-light);
            line-height: 1.65;
            display: none;
        }

        .faq-item.open .faq-answer {
            display: block;
        }

        .faq-item.open .faq-question i {
            transform: rotate(180deg);
            color: var(--color-primary);
        }

        .faq-item.open {
            border-color: rgba(230, 57, 70, 0.25);
            box-shadow: var(--shadow-sm);
        }

        /* ========== CTA ========== */
        .cta-section {
            background: linear-gradient(150deg, #1d3557 0%, #0d1b2a 100%);
            text-align: center;
            padding: 70px 20px;
            position: relative;
            overflow: hidden;
        }

        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.png') center/cover no-repeat;
            opacity: 0.15;
            z-index: 0;
        }

        .cta-section .cta-inner {
            position: relative;
            z-index: 1;
            max-width: 620px;
            margin: 0 auto;
        }

        .cta-section h2 {
            font-size: 2rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 12px;
            letter-spacing: -0.01em;
        }

        .cta-section p {
            color: rgba(210, 210, 225, 0.85);
            font-size: 1rem;
            margin-bottom: 28px;
            line-height: 1.6;
        }

        .btn-cta {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 14px 34px;
            border-radius: 28px;
            font-size: 1rem;
            font-weight: 600;
            background: #fff;
            color: var(--color-secondary);
            box-shadow: 0 8px 28px rgba(0, 0, 0, 0.30);
            transition: all var(--transition-normal);
            letter-spacing: 0.02em;
        }

        .btn-cta:hover {
            background: #f0f0f5;
            transform: translateY(-2px);
            box-shadow: 0 14px 38px rgba(0, 0, 0, 0.38);
            color: var(--color-secondary);
        }

        /* ========== FOOTER ========== */
        .site-footer {
            background: #0f1a28;
            color: rgba(200, 200, 215, 0.82);
            padding: 48px 20px 24px;
            font-size: 0.9rem;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.6fr 1fr 1fr;
            gap: 36px;
            max-width: 1080px;
            margin: 0 auto;
            padding-bottom: 28px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        }

        .footer-brand .site-logo {
            margin-bottom: 10px;
            color: #fff;
        }

        .footer-brand p {
            font-size: 0.85rem;
            color: rgba(180, 180, 195, 0.75);
            line-height: 1.6;
            margin: 0;
        }

        .footer-col h4 {
            font-size: 0.95rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 12px;
        }

        .footer-col ul {
            list-style: none;
            margin: 0;
            padding: 0;
        }

        .footer-col ul li {
            margin-bottom: 7px;
        }

        .footer-col ul li a {
            color: rgba(180, 180, 195, 0.75);
            font-size: 0.85rem;
            transition: color var(--transition-fast);
        }

        .footer-col ul li a:hover {
            color: var(--color-primary-light);
        }

        .footer-bottom {
            max-width: 1080px;
            margin: 0 auto;
            padding-top: 18px;
            text-align: center;
            font-size: 0.78rem;
            color: rgba(150, 150, 165, 0.7);
        }

        .footer-bottom p {
            margin: 0;
        }

        /* ========== RESPONSIVE ========== */
        @media (max-width: 1024px) {
            .features-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 18px;
            }
            .scenario-grid {
                grid-template-columns: 1fr;
                gap: 18px;
            }
            .page-hero h1 {
                font-size: 2.2rem;
            }
            .process-flow {
                gap: 16px;
            }
            .process-step::after {
                display: none;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 24px;
            }
            .footer-brand {
                grid-column: 1 / -1;
            }
        }

        @media (max-width: 768px) {
            .site-header .container {
                height: 56px;
            }
            .main-nav {
                display: none;
                position: absolute;
                top: 56px;
                left: 0;
                right: 0;
                flex-direction: column;
                background: rgba(255, 255, 255, 0.97);
                backdrop-filter: blur(20px);
                -webkit-backdrop-filter: blur(20px);
                padding: 12px 16px;
                gap: 2px;
                border-bottom: 1px solid var(--color-border);
                box-shadow: var(--shadow-md);
                z-index: 999;
            }
            .main-nav.open {
                display: flex;
            }
            .main-nav li a {
                display: block;
                padding: 12px 16px;
                border-radius: var(--radius-sm);
                text-align: center;
            }
            .nav-toggle {
                display: block;
            }
            .page-hero {
                min-height: 380px;
                padding: 60px 16px 50px;
                margin-top: 56px;
            }
            .page-hero h1 {
                font-size: 1.7rem;
            }
            .page-hero .hero-subtitle {
                font-size: 0.95rem;
            }
            .hero-stats-row {
                gap: 20px;
                margin-top: 28px;
            }
            .hero-stat-number {
                font-size: 1.5rem;
            }
            .features-grid {
                grid-template-columns: 1fr;
                gap: 14px;
            }
            .scenario-card {
                flex-direction: column;
            }
            .scenario-card .sc-img {
                width: 100%;
                min-height: 140px;
                max-height: 180px;
            }
            .section {
                padding: 48px 16px;
            }
            .section-header h2 {
                font-size: 1.5rem;
            }
            .process-flow {
                flex-direction: column;
                align-items: center;
                gap: 20px;
            }
            .process-step {
                min-width: auto;
                max-width: 280px;
            }
            .stats-bar-wrap {
                gap: 20px;
            }
            .stat-bar-value {
                font-size: 2rem;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .cta-section h2 {
                font-size: 1.5rem;
            }
        }

        @media (max-width: 520px) {
            .page-hero h1 {
                font-size: 1.4rem;
            }
            .page-hero .hero-subtitle {
                font-size: 0.85rem;
            }
            .btn-hero,
            .btn-cta {
                padding: 12px 24px;
                font-size: 0.9rem;
            }
            .hero-stats-row {
                gap: 14px;
            }
            .hero-stat-number {
                font-size: 1.25rem;
            }
            .hero-stat-label {
                font-size: 0.7rem;
            }
            .feature-card {
                padding: 22px 18px;
            }
            .feature-card h3 {
                font-size: 1rem;
            }
            .site-logo {
                font-size: 1.05rem;
            }
            .logo-icon {
                width: 32px;
                height: 32px;
                font-size: 0.85rem;
            }
        }

/* roulang page: article */
:root {
            --color-primary: #0f1f3d;
            --color-primary-light: #1a3560;
            --color-accent: #f0883e;
            --color-accent-hover: #e0772e;
            --color-accent-light: #fff3eb;
            --color-bg: #f4f5f7;
            --color-white: #ffffff;
            --color-text: #1e293b;
            --color-text-soft: #64748b;
            --color-text-light: #94a3b8;
            --color-border: #e2e8f0;
            --color-border-light: #f1f5f9;
            --color-success: #10b981;
            --color-shadow: rgba(15, 31, 61, 0.08);
            --color-shadow-md: rgba(15, 31, 61, 0.12);
            --color-shadow-lg: rgba(15, 31, 61, 0.18);
            --radius-sm: 8px;
            --radius-md: 12px;
            --radius-lg: 16px;
            --radius-xl: 20px;
            --radius-full: 50px;
            --font-heading: 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', system-ui, -apple-system, sans-serif;
            --font-body: 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', system-ui, -apple-system, sans-serif;
            --transition-fast: 0.15s ease;
            --transition-base: 0.25s ease;
            --transition-smooth: 0.35s cubic-bezier(0.4, 0, 0.2, 1);
            --nav-height: 68px;
            --section-gap: 64px;
            --content-max-width: 780px;
        }

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

        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        body {
            margin: 0;
            padding: 0;
            font-family: var(--font-body);
            font-size: 16px;
            line-height: 1.7;
            color: var(--color-text);
            background-color: var(--color-bg);
            min-height: 100vh;
            overflow-x: hidden;
        }

        a {
            color: inherit;
            text-decoration: none;
            transition: color var(--transition-fast);
        }
        a:hover {
            color: var(--color-accent);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        button {
            cursor: pointer;
            font-family: inherit;
        }

        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
        }
        .container--narrow {
            max-width: var(--content-max-width);
            margin: 0 auto;
            padding: 0 24px;
        }

        /* ========== HEADER / NAV ========== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            height: var(--nav-height);
            display: flex;
            align-items: center;
            background: rgba(15, 31, 61, 0.45);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid rgba(255, 255, 255, 0.12);
            transition: background var(--transition-smooth), box-shadow var(--transition-smooth), border-color var(--transition-smooth);
        }
        .site-header.scrolled {
            background: rgba(15, 31, 61, 0.96);
            box-shadow: 0 2px 24px var(--color-shadow-md);
            border-bottom-color: rgba(255, 255, 255, 0.06);
        }
        .site-header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            width: 100%;
        }
        .site-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-family: var(--font-heading);
            font-weight: 700;
            font-size: 1.25rem;
            color: #ffffff;
            letter-spacing: 0.02em;
            white-space: nowrap;
            transition: opacity var(--transition-fast);
            text-decoration: none;
        }
        .site-logo:hover {
            opacity: 0.85;
            color: #ffffff;
        }
        .logo-icon {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 38px;
            height: 38px;
            border-radius: var(--radius-sm);
            background: var(--color-accent);
            color: #ffffff;
            font-size: 0.95rem;
            flex-shrink: 0;
        }
        .main-nav {
            display: flex;
            align-items: center;
            gap: 6px;
            list-style: none;
            margin: 0;
            padding: 0;
        }
        .main-nav li a {
            display: inline-flex;
            align-items: center;
            padding: 10px 18px;
            border-radius: var(--radius-full);
            font-size: 0.95rem;
            font-weight: 500;
            color: rgba(255, 255, 255, 0.85);
            transition: all var(--transition-fast);
            white-space: nowrap;
            letter-spacing: 0.01em;
        }
        .main-nav li a:hover {
            color: #ffffff;
            background: rgba(255, 255, 255, 0.12);
        }
        .main-nav li a.active {
            color: #ffffff;
            background: var(--color-accent);
            font-weight: 600;
        }
        .nav-toggle {
            display: none;
            background: none;
            border: none;
            color: #ffffff;
            font-size: 1.4rem;
            padding: 8px;
            border-radius: var(--radius-sm);
            transition: background var(--transition-fast);
        }
        .nav-toggle:hover {
            background: rgba(255, 255, 255, 0.1);
        }

        /* ========== ARTICLE BANNER ========== */
        .article-banner {
            position: relative;
            min-height: 380px;
            display: flex;
            align-items: flex-end;
            padding: calc(var(--nav-height) + 40px) 0 48px;
            background-image: url('/assets/images/backpic/back-1.webp');
            background-size: cover;
            background-position: center 30%;
            background-repeat: no-repeat;
            overflow: hidden;
        }
        .article-banner::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, rgba(15, 31, 61, 0.55) 0%, rgba(15, 31, 61, 0.82) 60%, rgba(15, 31, 61, 0.95) 100%);
            z-index: 1;
        }
        .article-banner .container {
            position: relative;
            z-index: 2;
        }
        .article-banner__category {
            display: inline-flex;
            align-items: center;
            padding: 6px 16px;
            border-radius: var(--radius-full);
            background: var(--color-accent);
            color: #ffffff;
            font-size: 0.85rem;
            font-weight: 600;
            letter-spacing: 0.03em;
            margin-bottom: 16px;
        }
        .article-banner__title {
            font-family: var(--font-heading);
            font-size: 2.2rem;
            font-weight: 700;
            color: #ffffff;
            line-height: 1.3;
            margin: 0 0 14px;
            letter-spacing: 0.01em;
            max-width: 900px;
        }
        .article-banner__meta {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 20px;
            color: rgba(255, 255, 255, 0.75);
            font-size: 0.9rem;
        }
        .article-banner__meta span {
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }
        .article-banner__meta i {
            font-size: 0.85rem;
            opacity: 0.8;
        }

        /* ========== BREADCRUMB ========== */
        .breadcrumb-row {
            background: var(--color-white);
            border-bottom: 1px solid var(--color-border-light);
            padding: 14px 0;
        }
        .breadcrumb {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 8px;
            font-size: 0.88rem;
            color: var(--color-text-soft);
            list-style: none;
            margin: 0;
            padding: 0;
        }
        .breadcrumb li {
            display: inline-flex;
            align-items: center;
        }
        .breadcrumb li a {
            color: var(--color-text-soft);
            transition: color var(--transition-fast);
        }
        .breadcrumb li a:hover {
            color: var(--color-accent);
        }
        .breadcrumb li.separator {
            color: var(--color-text-light);
            margin: 0 2px;
        }
        .breadcrumb li.current {
            color: var(--color-text);
            font-weight: 500;
        }

        /* ========== ARTICLE CONTENT ========== */
        .article-content-section {
            background: var(--color-white);
            padding: 48px 0 56px;
        }
        .article-featured-image {
            border-radius: var(--radius-lg);
            overflow: hidden;
            margin-bottom: 36px;
            box-shadow: 0 4px 20px var(--color-shadow);
        }
        .article-featured-image img {
            width: 100%;
            height: auto;
            object-fit: cover;
            border-radius: var(--radius-lg);
        }
        .article-body {
            font-size: 1.05rem;
            line-height: 1.85;
            color: var(--color-text);
        }
        .article-body h2 {
            font-family: var(--font-heading);
            font-size: 1.55rem;
            font-weight: 700;
            color: var(--color-primary);
            margin: 40px 0 16px;
            padding-bottom: 10px;
            border-bottom: 3px solid var(--color-accent);
            display: inline-block;
        }
        .article-body h3 {
            font-family: var(--font-heading);
            font-size: 1.25rem;
            font-weight: 600;
            color: var(--color-primary-light);
            margin: 28px 0 12px;
        }
        .article-body p {
            margin: 0 0 18px;
            color: var(--color-text);
        }
        .article-body ul,
        .article-body ol {
            margin: 0 0 20px;
            padding-left: 24px;
        }
        .article-body li {
            margin-bottom: 8px;
        }
        .article-body blockquote {
            margin: 24px 0;
            padding: 20px 24px;
            border-left: 4px solid var(--color-accent);
            background: var(--color-accent-light);
            border-radius: 0 var(--radius-md) var(--radius-md) 0;
            font-style: italic;
            color: var(--color-primary-light);
        }
        .article-body img {
            border-radius: var(--radius-md);
            margin: 20px 0;
            box-shadow: 0 2px 12px var(--color-shadow);
        }
        .article-body table {
            width: 100%;
            border-collapse: collapse;
            margin: 20px 0;
            font-size: 0.95rem;
            border-radius: var(--radius-sm);
            overflow: hidden;
            box-shadow: 0 1px 8px var(--color-shadow);
        }
        .article-body table th {
            background: var(--color-primary);
            color: #ffffff;
            padding: 12px 16px;
            font-weight: 600;
            text-align: left;
            font-size: 0.9rem;
            letter-spacing: 0.02em;
        }
        .article-body table td {
            padding: 10px 16px;
            border-bottom: 1px solid var(--color-border-light);
            background: var(--color-white);
        }
        .article-body table tr:nth-child(even) td {
            background: #fafbfc;
        }
        .article-body table tr:hover td {
            background: #f0f4f8;
        }
        .article-body a {
            color: var(--color-accent);
            text-decoration: underline;
            text-underline-offset: 3px;
        }
        .article-body a:hover {
            color: var(--color-accent-hover);
        }
        .article-body code {
            background: #f1f5f9;
            padding: 2px 8px;
            border-radius: 4px;
            font-size: 0.9em;
            color: var(--color-primary-light);
        }
        .article-body .table-wrapper {
            overflow-x: auto;
            -webkit-overflow-scrolling: touch;
            margin: 20px 0;
        }

        /* ========== ARTICLE FOOTER META ========== */
        .article-footer-meta {
            margin-top: 40px;
            padding-top: 24px;
            border-top: 1px solid var(--color-border);
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
        }
        .article-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
            align-items: center;
        }
        .article-tag {
            display: inline-flex;
            padding: 5px 14px;
            border-radius: var(--radius-full);
            background: #f1f5f9;
            color: var(--color-text-soft);
            font-size: 0.82rem;
            font-weight: 500;
            transition: all var(--transition-fast);
        }
        .article-tag:hover {
            background: var(--color-accent-light);
            color: var(--color-accent);
        }
        .article-share {
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .article-share span {
            font-size: 0.88rem;
            color: var(--color-text-soft);
            font-weight: 500;
        }
        .article-share a {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 36px;
            height: 36px;
            border-radius: 50%;
            background: #f1f5f9;
            color: var(--color-text-soft);
            font-size: 0.9rem;
            transition: all var(--transition-fast);
        }
        .article-share a:hover {
            background: var(--color-primary);
            color: #ffffff;
        }

        /* ========== NOT FOUND STATE ========== */
        .not-found-block {
            text-align: center;
            padding: 80px 24px;
            background: var(--color-white);
            border-radius: var(--radius-lg);
            box-shadow: 0 2px 16px var(--color-shadow);
            margin: 40px 0;
        }
        .not-found-block .icon-circle {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 80px;
            height: 80px;
            border-radius: 50%;
            background: #fef3c7;
            color: #d97706;
            font-size: 2rem;
            margin-bottom: 20px;
        }
        .not-found-block h3 {
            font-family: var(--font-heading);
            font-size: 1.5rem;
            font-weight: 700;
            color: var(--color-text);
            margin-bottom: 8px;
        }
        .not-found-block p {
            color: var(--color-text-soft);
            margin-bottom: 24px;
        }

        /* ========== RELATED POSTS ========== */
        .related-section {
            background: var(--color-bg);
            padding: 56px 0 64px;
        }
        .related-section .section-label {
            font-family: var(--font-heading);
            font-size: 1.6rem;
            font-weight: 700;
            color: var(--color-primary);
            margin-bottom: 8px;
            text-align: center;
        }
        .related-section .section-subtitle {
            color: var(--color-text-soft);
            text-align: center;
            margin-bottom: 36px;
            font-size: 0.95rem;
        }
        .related-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .related-card {
            background: var(--color-white);
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: 0 2px 12px var(--color-shadow);
            transition: all var(--transition-smooth);
            display: flex;
            flex-direction: column;
        }
        .related-card:hover {
            transform: translateY(-4px);
            box-shadow: 0 8px 28px var(--color-shadow-lg);
        }
        .related-card__image {
            height: 180px;
            overflow: hidden;
        }
        .related-card__image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform var(--transition-smooth);
        }
        .related-card:hover .related-card__image img {
            transform: scale(1.06);
        }
        .related-card__body {
            padding: 18px 20px 20px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .related-card__body h4 {
            font-family: var(--font-heading);
            font-size: 1rem;
            font-weight: 600;
            color: var(--color-text);
            margin: 0 0 8px;
            line-height: 1.45;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .related-card__body p {
            font-size: 0.88rem;
            color: var(--color-text-soft);
            margin: 0 0 14px;
            flex: 1;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .related-card__link {
            font-size: 0.85rem;
            font-weight: 600;
            color: var(--color-accent);
            display: inline-flex;
            align-items: center;
            gap: 4px;
            transition: gap var(--transition-fast);
        }
        .related-card__link:hover {
            gap: 8px;
            color: var(--color-accent-hover);
        }
        .related-card__link i {
            font-size: 0.75rem;
        }

        /* ========== CTA SECTION ========== */
        .cta-section {
            background: var(--color-primary);
            padding: 56px 0;
            text-align: center;
            position: relative;
            overflow: hidden;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            top: -60px;
            right: -80px;
            width: 260px;
            height: 260px;
            border-radius: 50%;
            background: rgba(240, 136, 62, 0.15);
            z-index: 0;
        }
        .cta-section::after {
            content: '';
            position: absolute;
            bottom: -50px;
            left: -60px;
            width: 200px;
            height: 200px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.04);
            z-index: 0;
        }
        .cta-section .container {
            position: relative;
            z-index: 1;
        }
        .cta-section h2 {
            font-family: var(--font-heading);
            font-size: 1.8rem;
            font-weight: 700;
            color: #ffffff;
            margin: 0 0 12px;
        }
        .cta-section p {
            color: rgba(255, 255, 255, 0.75);
            font-size: 1.05rem;
            margin: 0 0 28px;
            max-width: 560px;
            margin-left: auto;
            margin-right: auto;
        }
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 13px 28px;
            border-radius: var(--radius-full);
            font-size: 0.95rem;
            font-weight: 600;
            letter-spacing: 0.02em;
            transition: all var(--transition-fast);
            border: none;
            cursor: pointer;
            text-decoration: none;
        }
        .btn-accent {
            background: var(--color-accent);
            color: #ffffff;
            box-shadow: 0 4px 14px rgba(240, 136, 62, 0.35);
        }
        .btn-accent:hover {
            background: var(--color-accent-hover);
            color: #ffffff;
            box-shadow: 0 6px 20px rgba(240, 136, 62, 0.5);
            transform: translateY(-2px);
        }
        .btn-outline-light {
            background: transparent;
            color: #ffffff;
            border: 2px solid rgba(255, 255, 255, 0.4);
        }
        .btn-outline-light:hover {
            background: rgba(255, 255, 255, 0.1);
            border-color: rgba(255, 255, 255, 0.7);
            color: #ffffff;
        }

        /* ========== FOOTER ========== */
        .site-footer {
            background: #0a1628;
            color: rgba(255, 255, 255, 0.7);
            padding: 48px 0 24px;
            font-size: 0.9rem;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 36px;
        }
        .footer-brand .site-logo {
            margin-bottom: 12px;
            font-size: 1.15rem;
        }
        .footer-brand p {
            color: rgba(255, 255, 255, 0.55);
            line-height: 1.6;
            margin: 0;
            max-width: 320px;
        }
        .footer-col h4 {
            font-family: var(--font-heading);
            font-size: 0.95rem;
            font-weight: 600;
            color: #ffffff;
            margin: 0 0 14px;
            letter-spacing: 0.03em;
        }
        .footer-col ul {
            list-style: none;
            margin: 0;
            padding: 0;
        }
        .footer-col ul li {
            margin-bottom: 8px;
        }
        .footer-col ul li a {
            color: rgba(255, 255, 255, 0.55);
            transition: color var(--transition-fast);
            font-size: 0.88rem;
        }
        .footer-col ul li a:hover {
            color: var(--color-accent);
        }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            padding-top: 18px;
            text-align: center;
            color: rgba(255, 255, 255, 0.4);
            font-size: 0.82rem;
        }
        .footer-bottom p {
            margin: 0;
        }

        /* ========== BUTTONS GLOBAL ========== */
        .btn-back {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 10px 20px;
            border-radius: var(--radius-full);
            font-weight: 600;
            font-size: 0.9rem;
            background: var(--color-primary);
            color: #ffffff;
            transition: all var(--transition-fast);
            text-decoration: none;
        }
        .btn-back:hover {
            background: var(--color-primary-light);
            color: #ffffff;
            transform: translateY(-1px);
        }

        /* ========== RESPONSIVE ========== */
        @media (max-width: 1024px) {
            .article-banner__title {
                font-size: 1.7rem;
            }
            .related-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 18px;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 28px;
            }
            .footer-brand {
                grid-column: 1 / -1;
            }
        }
        @media (max-width: 768px) {
            :root {
                --nav-height: 60px;
                --section-gap: 40px;
            }
            .nav-toggle {
                display: block;
            }
            .main-nav {
                display: none;
                position: absolute;
                top: var(--nav-height);
                left: 0;
                right: 0;
                flex-direction: column;
                background: rgba(15, 31, 61, 0.98);
                backdrop-filter: blur(20px);
                -webkit-backdrop-filter: blur(20px);
                padding: 16px 20px;
                gap: 4px;
                border-bottom: 1px solid rgba(255, 255, 255, 0.08);
                box-shadow: 0 12px 32px rgba(0, 0, 0, 0.3);
            }
            .main-nav.open {
                display: flex;
            }
            .main-nav li a {
                width: 100%;
                padding: 12px 16px;
                border-radius: var(--radius-sm);
                font-size: 1rem;
            }
            .article-banner {
                min-height: 280px;
                padding: calc(var(--nav-height) + 28px) 0 36px;
            }
            .article-banner__title {
                font-size: 1.4rem;
            }
            .article-banner__meta {
                font-size: 0.82rem;
                gap: 12px;
            }
            .article-content-section {
                padding: 32px 0 40px;
            }
            .article-body {
                font-size: 1rem;
                line-height: 1.75;
            }
            .article-body h2 {
                font-size: 1.3rem;
            }
            .related-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .related-card__image {
                height: 160px;
            }
            .cta-section h2 {
                font-size: 1.4rem;
            }
            .cta-section p {
                font-size: 0.95rem;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .article-footer-meta {
                flex-direction: column;
                align-items: flex-start;
            }
            .breadcrumb {
                font-size: 0.8rem;
            }
        }
        @media (max-width: 520px) {
            .container {
                padding: 0 16px;
            }
            .container--narrow {
                padding: 0 16px;
            }
            .article-banner {
                min-height: 240px;
                padding: calc(var(--nav-height) + 20px) 0 28px;
            }
            .article-banner__title {
                font-size: 1.2rem;
            }
            .article-banner__category {
                font-size: 0.78rem;
                padding: 5px 12px;
            }
            .article-body {
                font-size: 0.95rem;
            }
            .article-body h2 {
                font-size: 1.15rem;
            }
            .btn {
                padding: 11px 22px;
                font-size: 0.88rem;
            }
            .related-section .section-label {
                font-size: 1.3rem;
            }
        }

/* roulang page: category2 */
:root {
            --primary: #1a6ce0;
            --primary-dark: #1251b3;
            --primary-light: #e8f1fd;
            --secondary: #f97316;
            --secondary-dark: #d4620e;
            --accent: #10b981;
            --accent-dark: #059669;
            --bg-white: #ffffff;
            --bg-light: #f8fafc;
            --bg-slate: #f1f5f9;
            --bg-dark: #0f172a;
            --bg-dark-card: #1e293b;
            --text-primary: #1e293b;
            --text-secondary: #475569;
            --text-muted: #94a3b8;
            --text-on-dark: #f1f5f9;
            --text-on-primary: #ffffff;
            --border-light: #e2e8f0;
            --border-medium: #cbd5e1;
            --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
            --shadow-md: 0 4px 12px rgba(0,0,0,0.08);
            --shadow-lg: 0 12px 32px rgba(0,0,0,0.12);
            --shadow-xl: 0 20px 48px rgba(0,0,0,0.16);
            --shadow-card: 0 2px 8px rgba(0,0,0,0.06), 0 8px 24px rgba(0,0,0,0.04);
            --shadow-card-hover: 0 4px 16px rgba(0,0,0,0.10), 0 12px 36px rgba(0,0,0,0.06);
            --radius-xs: 6px;
            --radius-sm: 10px;
            --radius-md: 16px;
            --radius-lg: 20px;
            --radius-xl: 24px;
            --radius-full: 999px;
            --transition-fast: 0.18s ease;
            --transition-normal: 0.28s ease;
            --transition-slow: 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
            --font-heading: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', sans-serif;
            --font-body: 'PingFang SC', 'Microsoft YaHei', 'Segoe UI', sans-serif;
            --font-mono: 'SF Mono', 'Menlo', 'Consolas', monospace;
            --max-width: 1280px;
            --header-height: 72px;
        }

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

        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            font-size: 16px;
        }

        body {
            margin: 0;
            padding: 0;
            font-family: var(--font-body);
            font-size: 1rem;
            line-height: 1.7;
            color: var(--text-primary);
            background-color: var(--bg-white);
            overflow-x: hidden;
            min-height: 100vh;
        }

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

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

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

        a:focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 3px;
            border-radius: var(--radius-xs);
        }

        button {
            cursor: pointer;
            font-family: inherit;
        }

        button:focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 3px;
            border-radius: var(--radius-xs);
        }

        h1, h2, h3, h4, h5, h6 {
            font-family: var(--font-heading);
            font-weight: 700;
            line-height: 1.3;
            color: var(--text-primary);
            margin-top: 0;
        }

        h1 { font-size: 2.6rem; letter-spacing: -0.02em; }
        h2 { font-size: 2rem; letter-spacing: -0.01em; }
        h3 { font-size: 1.5rem; }
        h4 { font-size: 1.2rem; }

        p {
            margin-top: 0;
            margin-bottom: 1rem;
            color: var(--text-secondary);
        }

        ul, ol {
            list-style: none;
            padding: 0;
            margin: 0;
        }

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

        @media (max-width: 768px) {
            .container {
                padding: 0 16px;
            }
            h1 { font-size: 2rem; }
            h2 { font-size: 1.6rem; }
            h3 { font-size: 1.3rem; }
        }

        /* Header & Navigation - 玻璃沉浸 */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            height: var(--header-height);
            display: flex;
            align-items: center;
            background: rgba(255, 255, 255, 0.82);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            border-bottom: 1px solid rgba(226, 232, 240, 0.6);
            box-shadow: 0 1px 8px rgba(0,0,0,0.04);
            transition: background var(--transition-normal), box-shadow var(--transition-normal), border-color var(--transition-normal);
        }

        .site-header.scrolled {
            background: rgba(255, 255, 255, 0.97);
            box-shadow: 0 2px 16px rgba(0,0,0,0.10);
            border-bottom-color: rgba(226, 232, 240, 0.9);
        }

        .site-header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            width: 100%;
            max-width: var(--max-width);
        }

        .site-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-family: var(--font-heading);
            font-weight: 700;
            font-size: 1.35rem;
            color: var(--text-primary);
            text-decoration: none;
            white-space: nowrap;
            letter-spacing: -0.01em;
            transition: color var(--transition-fast);
        }

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

        .logo-icon {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            background: linear-gradient(135deg, var(--primary), #3b82f6);
            color: #fff;
            border-radius: var(--radius-sm);
            font-size: 1.1rem;
            box-shadow: 0 2px 8px rgba(26, 108, 224, 0.25);
        }

        .main-nav {
            display: flex;
            align-items: center;
            gap: 6px;
            list-style: none;
            margin: 0;
            padding: 0;
        }

        .main-nav li a {
            display: inline-flex;
            align-items: center;
            padding: 10px 18px;
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--text-secondary);
            text-decoration: none;
            border-radius: var(--radius-full);
            transition: all var(--transition-fast);
            white-space: nowrap;
            position: relative;
        }

        .main-nav li a:hover {
            color: var(--primary);
            background: var(--primary-light);
        }

        .main-nav li a.active {
            color: var(--primary);
            background: var(--primary-light);
            font-weight: 600;
        }

        .nav-toggle {
            display: none;
            background: none;
            border: none;
            font-size: 1.5rem;
            color: var(--text-primary);
            padding: 8px 12px;
            border-radius: var(--radius-xs);
            transition: background var(--transition-fast);
        }

        .nav-toggle:hover {
            background: var(--bg-slate);
        }

        @media (max-width: 768px) {
            .nav-toggle {
                display: flex;
                align-items: center;
                justify-content: center;
            }

            .main-nav {
                display: none;
                position: absolute;
                top: var(--header-height);
                left: 0;
                right: 0;
                flex-direction: column;
                background: rgba(255, 255, 255, 0.98);
                backdrop-filter: blur(20px);
                -webkit-backdrop-filter: blur(20px);
                border-bottom: 1px solid var(--border-light);
                box-shadow: var(--shadow-lg);
                padding: 12px 16px;
                gap: 2px;
                z-index: 999;
            }

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

            .main-nav li {
                width: 100%;
            }

            .main-nav li a {
                display: flex;
                width: 100%;
                padding: 14px 20px;
                border-radius: var(--radius-sm);
                font-size: 1rem;
            }
        }

        /* Hero */
        .hero-section {
            position: relative;
            min-height: 580px;
            display: flex;
            align-items: center;
            justify-content: center;
            text-align: center;
            padding: calc(var(--header-height) + 60px) 24px 80px;
            background: url('/assets/images/backpic/back-1.webp') center / cover no-repeat;
            background-attachment: fixed;
            overflow: hidden;
        }

        .hero-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, rgba(15,23,42,0.72) 0%, rgba(15,23,42,0.85) 60%, rgba(15,23,42,0.92) 100%);
            z-index: 1;
        }

        .hero-section .hero-content {
            position: relative;
            z-index: 2;
            max-width: 780px;
        }

        .hero-section .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 8px 18px;
            background: rgba(255,255,255,0.12);
            border: 1px solid rgba(255,255,255,0.22);
            border-radius: var(--radius-full);
            color: #e2e8f0;
            font-size: 0.9rem;
            font-weight: 500;
            margin-bottom: 24px;
            backdrop-filter: blur(6px);
        }

        .hero-section .hero-badge i {
            color: var(--secondary);
            font-size: 0.8rem;
        }

        .hero-section h1 {
            color: #ffffff;
            font-size: 3rem;
            font-weight: 800;
            letter-spacing: -0.03em;
            margin-bottom: 18px;
            text-shadow: 0 2px 12px rgba(0,0,0,0.3);
        }

        .hero-section h1 span {
            background: linear-gradient(135deg, #60a5fa, #93c5fd);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .hero-section .hero-subtitle {
            color: #cbd5e1;
            font-size: 1.15rem;
            line-height: 1.8;
            margin-bottom: 36px;
            max-width: 620px;
            margin-left: auto;
            margin-right: auto;
        }

        .hero-cta-group {
            display: flex;
            gap: 14px;
            flex-wrap: wrap;
            justify-content: center;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 14px 28px;
            font-size: 1rem;
            font-weight: 600;
            font-family: var(--font-heading);
            border-radius: var(--radius-full);
            border: none;
            cursor: pointer;
            transition: all var(--transition-normal);
            text-decoration: none;
            white-space: nowrap;
            letter-spacing: 0.01em;
        }

        .btn-primary {
            background: var(--primary);
            color: #fff;
            box-shadow: 0 4px 16px rgba(26,108,224,0.35);
        }

        .btn-primary:hover {
            background: var(--primary-dark);
            color: #fff;
            box-shadow: 0 6px 24px rgba(26,108,224,0.45);
            transform: translateY(-2px);
        }

        .btn-outline-light {
            background: transparent;
            color: #e2e8f0;
            border: 2px solid rgba(255,255,255,0.35);
        }

        .btn-outline-light:hover {
            background: rgba(255,255,255,0.1);
            color: #fff;
            border-color: rgba(255,255,255,0.6);
            transform: translateY(-2px);
        }

        .btn-outline {
            background: transparent;
            color: var(--primary);
            border: 2px solid var(--primary);
        }

        .btn-outline:hover {
            background: var(--primary);
            color: #fff;
            transform: translateY(-2px);
        }

        .btn-lg {
            padding: 16px 34px;
            font-size: 1.1rem;
        }

        .btn-sm {
            padding: 10px 20px;
            font-size: 0.9rem;
        }

        @media (max-width: 768px) {
            .hero-section {
                min-height: auto;
                padding: calc(var(--header-height) + 40px) 16px 60px;
                background-attachment: scroll;
            }
            .hero-section h1 {
                font-size: 2rem;
            }
            .hero-section .hero-subtitle {
                font-size: 1rem;
            }
        }

        /* Sections */
        .section {
            padding: 80px 0;
        }

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

        .section-lg {
            padding: 100px 0;
        }

        .section-header {
            text-align: center;
            margin-bottom: 56px;
        }

        .section-header .section-label {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 0.85rem;
            font-weight: 600;
            color: var(--primary);
            text-transform: uppercase;
            letter-spacing: 0.06em;
            margin-bottom: 12px;
        }

        .section-header h2 {
            margin-bottom: 14px;
        }

        .section-header .section-desc {
            color: var(--text-muted);
            max-width: 560px;
            margin: 0 auto;
            font-size: 1.05rem;
        }

        @media (max-width: 768px) {
            .section { padding: 52px 0; }
            .section-lg { padding: 64px 0; }
            .section-header { margin-bottom: 36px; }
        }

        /* Data Metrics */
        .bg-slate-section {
            background: var(--bg-slate);
        }

        .metrics-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }

        .metric-card {
            background: var(--bg-white);
            border-radius: var(--radius-md);
            padding: 28px 24px;
            text-align: center;
            box-shadow: var(--shadow-card);
            transition: all var(--transition-normal);
            border: 1px solid transparent;
            position: relative;
            overflow: hidden;
        }

        .metric-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 4px;
            background: linear-gradient(90deg, var(--primary), #60a5fa);
            border-radius: var(--radius-md) var(--radius-md) 0 0;
            opacity: 0;
            transition: opacity var(--transition-normal);
        }

        .metric-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-card-hover);
            border-color: var(--border-light);
        }

        .metric-card:hover::before {
            opacity: 1;
        }

        .metric-card .metric-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 56px;
            height: 56px;
            border-radius: var(--radius-sm);
            margin-bottom: 16px;
            font-size: 1.4rem;
        }

        .metric-card .metric-icon.blue {
            background: #eff6ff;
            color: #3b82f6;
        }

        .metric-card .metric-icon.orange {
            background: #fff7ed;
            color: #f97316;
        }

        .metric-card .metric-icon.green {
            background: #ecfdf5;
            color: #10b981;
        }

        .metric-card .metric-icon.purple {
            background: #f5f3ff;
            color: #8b5cf6;
        }

        .metric-card .metric-value {
            font-family: var(--font-heading);
            font-size: 2.4rem;
            font-weight: 800;
            color: var(--text-primary);
            letter-spacing: -0.02em;
            line-height: 1;
        }

        .metric-card .metric-label {
            font-size: 0.9rem;
            color: var(--text-muted);
            margin-top: 8px;
        }

        .metric-card .metric-trend {
            display: inline-flex;
            align-items: center;
            gap: 4px;
            font-size: 0.82rem;
            font-weight: 600;
            color: var(--accent);
            margin-top: 6px;
        }

        @media (max-width: 1024px) {
            .metrics-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        @media (max-width: 520px) {
            .metrics-grid {
                grid-template-columns: 1fr;
            }
        }

        /* Feature Cards */
        .features-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

        .feature-card {
            background: var(--bg-white);
            border-radius: var(--radius-lg);
            padding: 0;
            overflow: hidden;
            box-shadow: var(--shadow-card);
            transition: all var(--transition-normal);
            border: 1px solid var(--border-light);
            display: flex;
            flex-direction: column;
        }

        .feature-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-card-hover);
        }

        .feature-card .feature-img-wrap {
            position: relative;
            overflow: hidden;
            height: 200px;
        }

        .feature-card .feature-img-wrap img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform var(--transition-slow);
        }

        .feature-card:hover .feature-img-wrap img {
            transform: scale(1.06);
        }

        .feature-card .feature-body {
            padding: 24px;
            flex: 1;
        }

        .feature-card .feature-body h3 {
            font-size: 1.25rem;
            margin-bottom: 8px;
        }

        .feature-card .feature-body p {
            font-size: 0.95rem;
            color: var(--text-muted);
            margin-bottom: 0;
            line-height: 1.65;
        }

        .feature-card .feature-tag {
            display: inline-block;
            padding: 4px 12px;
            font-size: 0.78rem;
            font-weight: 600;
            border-radius: var(--radius-full);
            background: var(--primary-light);
            color: var(--primary);
            margin-bottom: 10px;
        }

        @media (max-width: 1024px) {
            .features-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        @media (max-width: 640px) {
            .features-grid {
                grid-template-columns: 1fr;
            }
        }

        /* Process Steps */
        .process-steps {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 28px;
            position: relative;
        }

        .process-steps::before {
            content: '';
            position: absolute;
            top: 44px;
            left: 12%;
            right: 12%;
            height: 3px;
            background: linear-gradient(90deg, var(--primary), #60a5fa, var(--primary));
            border-radius: var(--radius-full);
            z-index: 0;
            opacity: 0.3;
        }

        .process-step {
            text-align: center;
            position: relative;
            z-index: 1;
        }

        .process-step .step-number {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 56px;
            height: 56px;
            border-radius: 50%;
            background: var(--bg-white);
            border: 3px solid var(--primary);
            color: var(--primary);
            font-size: 1.3rem;
            font-weight: 800;
            font-family: var(--font-heading);
            margin-bottom: 16px;
            box-shadow: 0 0 0 8px rgba(26,108,224,0.08);
            transition: all var(--transition-normal);
        }

        .process-step:hover .step-number {
            background: var(--primary);
            color: #fff;
            box-shadow: 0 0 0 16px rgba(26,108,224,0.14);
        }

        .process-step h4 {
            margin-bottom: 6px;
            font-size: 1.1rem;
        }

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

        @media (max-width: 1024px) {
            .process-steps {
                grid-template-columns: repeat(2, 1fr);
            }
            .process-steps::before {
                display: none;
            }
        }

        @media (max-width: 520px) {
            .process-steps {
                grid-template-columns: 1fr;
            }
        }

        /* Dark CTA Block */
        .dark-cta-block {
            background: var(--bg-dark);
            border-radius: var(--radius-xl);
            padding: 56px 48px;
            text-align: center;
            position: relative;
            overflow: hidden;
        }

        .dark-cta-block::before {
            content: '';
            position: absolute;
            top: -60px;
            right: -60px;
            width: 260px;
            height: 260px;
            border-radius: 50%;
            background: radial-gradient(circle, rgba(26,108,224,0.25) 0%, transparent 70%);
            pointer-events: none;
        }

        .dark-cta-block::after {
            content: '';
            position: absolute;
            bottom: -40px;
            left: -40px;
            width: 200px;
            height: 200px;
            border-radius: 50%;
            background: radial-gradient(circle, rgba(249,115,22,0.18) 0%, transparent 70%);
            pointer-events: none;
        }

        .dark-cta-block .cta-inner {
            position: relative;
            z-index: 1;
        }

        .dark-cta-block h2 {
            color: #fff;
            margin-bottom: 12px;
        }

        .dark-cta-block p {
            color: #94a3b8;
            max-width: 540px;
            margin: 0 auto 28px;
        }

        /* FAQ */
        .faq-list {
            max-width: 780px;
            margin: 0 auto;
        }

        .faq-item {
            border-bottom: 1px solid var(--border-light);
            padding: 24px 0;
            cursor: pointer;
            transition: all var(--transition-fast);
        }

        .faq-item:first-child {
            border-top: 1px solid var(--border-light);
        }

        .faq-item .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            font-weight: 600;
            font-size: 1.08rem;
            color: var(--text-primary);
            transition: color var(--transition-fast);
        }

        .faq-item .faq-question i {
            font-size: 0.85rem;
            color: var(--text-muted);
            transition: transform var(--transition-normal), color var(--transition-fast);
        }

        .faq-item.open .faq-question i {
            transform: rotate(180deg);
            color: var(--primary);
        }

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

        .faq-item .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height var(--transition-slow), padding-top var(--transition-normal);
            color: var(--text-secondary);
            line-height: 1.7;
            font-size: 0.95rem;
        }

        .faq-item.open .faq-answer {
            max-height: 300px;
            padding-top: 12px;
        }

        /* CTA Section */
        .cta-section {
            background: linear-gradient(135deg, #eff6ff 0%, #f8fafc 50%, #fef7ed 100%);
            text-align: center;
        }

        .cta-section h2 {
            margin-bottom: 10px;
        }

        .cta-section .cta-buttons {
            display: flex;
            gap: 14px;
            flex-wrap: wrap;
            justify-content: center;
            margin-top: 28px;
        }

        /* Footer */
        .site-footer {
            background: var(--bg-dark);
            color: var(--text-on-dark);
            padding: 56px 0 28px;
        }

        .site-footer .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 36px;
        }

        .site-footer .footer-brand .site-logo {
            color: #e2e8f0;
            margin-bottom: 14px;
            font-size: 1.25rem;
        }

        .site-footer .footer-brand p {
            color: #94a3b8;
            font-size: 0.92rem;
            line-height: 1.7;
            max-width: 340px;
        }

        .site-footer .footer-col h4 {
            color: #e2e8f0;
            font-size: 1rem;
            margin-bottom: 16px;
            font-weight: 600;
        }

        .site-footer .footer-col ul li {
            margin-bottom: 10px;
        }

        .site-footer .footer-col ul li a {
            color: #94a3b8;
            font-size: 0.92rem;
            transition: color var(--transition-fast);
        }

        .site-footer .footer-col ul li a:hover {
            color: #cbd5e1;
        }

        .site-footer .footer-bottom {
            border-top: 1px solid rgba(255,255,255,0.1);
            padding-top: 20px;
            text-align: center;
        }

        .site-footer .footer-bottom p {
            color: #64748b;
            font-size: 0.85rem;
            margin: 0;
        }

        @media (max-width: 768px) {
            .site-footer .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 28px;
            }
            .site-footer .footer-brand {
                grid-column: 1 / -1;
            }
        }

        @media (max-width: 520px) {
            .site-footer .footer-grid {
                grid-template-columns: 1fr;
            }
            .dark-cta-block {
                padding: 36px 20px;
            }
        }

        /* Badge / Tag */
        .tag {
            display: inline-flex;
            align-items: center;
            padding: 5px 14px;
            font-size: 0.8rem;
            font-weight: 600;
            border-radius: var(--radius-full);
            letter-spacing: 0.02em;
        }

        .tag-blue {
            background: #eff6ff;
            color: #2563eb;
        }

        .tag-green {
            background: #ecfdf5;
            color: #059669;
        }

        .tag-orange {
            background: #fff7ed;
            color: #ea580c;
        }

        /* Scene Cards */
        .scene-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 24px;
        }

        .scene-card {
            background: var(--bg-white);
            border-radius: var(--radius-lg);
            padding: 32px;
            border: 1px solid var(--border-light);
            box-shadow: var(--shadow-card);
            transition: all var(--transition-normal);
            display: flex;
            gap: 20px;
            align-items: flex-start;
        }

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

        .scene-card .scene-icon {
            flex-shrink: 0;
            width: 52px;
            height: 52px;
            border-radius: var(--radius-sm);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.3rem;
        }

        .scene-card .scene-icon.blue-bg {
            background: #eff6ff;
            color: #3b82f6;
        }

        .scene-card .scene-icon.green-bg {
            background: #ecfdf5;
            color: #10b981;
        }

        .scene-card .scene-icon.orange-bg {
            background: #fff7ed;
            color: #f97316;
        }

        .scene-card .scene-icon.purple-bg {
            background: #f5f3ff;
            color: #8b5cf6;
        }

        .scene-card .scene-info h4 {
            margin-bottom: 4px;
        }

        .scene-card .scene-info p {
            font-size: 0.9rem;
            color: var(--text-muted);
            margin-bottom: 0;
        }

        @media (max-width: 768px) {
            .scene-grid {
                grid-template-columns: 1fr;
            }
            .scene-card {
                flex-direction: column;
                gap: 14px;
            }
        }

        /* Utility */
        .text-center { text-align: center; }