/* roulang page: index */
/* ===== 设计变量 ===== */
        :root {
            --primary: #0f1724;
            --primary-light: #1a2a4a;
            --secondary: #e84d3b;
            --secondary-hover: #d43a2a;
            --accent: #f0a500;
            --accent-light: #ffc107;
            --bg-body: #f4f6fa;
            --bg-white: #ffffff;
            --bg-dark: #0a0e17;
            --bg-card: #ffffff;
            --bg-muted: #eef1f6;
            --text-primary: #0f1724;
            --text-secondary: #4a5568;
            --text-muted: #8a94a6;
            --text-light: #ffffff;
            --border: #e2e6ed;
            --border-light: #f0f2f5;
            --radius-sm: 8px;
            --radius-md: 14px;
            --radius-lg: 24px;
            --shadow-sm: 0 2px 8px rgba(15, 23, 36, 0.06);
            --shadow-md: 0 8px 30px rgba(15, 23, 36, 0.10);
            --shadow-lg: 0 20px 60px rgba(15, 23, 36, 0.14);
            --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
            --container-w: 1200px;
            --header-h: 72px;
        }

        /* ===== Reset / Base ===== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
        }
        body {
            font-family: var(--font-family);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text-primary);
            background: var(--bg-body);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        a {
            color: inherit;
            text-decoration: none;
            transition: var(--transition);
        }
        button,
        input,
        textarea {
            font-family: inherit;
            font-size: inherit;
            border: none;
            outline: none;
            background: none;
        }
        button {
            cursor: pointer;
        }
        ul,
        ol {
            list-style: none;
        }
        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            line-height: 1.3;
            font-weight: 700;
            color: var(--text-primary);
        }

        /* ===== Container ===== */
        .container {
            max-width: var(--container-w);
            margin: 0 auto;
            padding: 0 24px;
        }

        /* ===== Header / Nav ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            height: var(--header-h);
            background: rgba(15, 23, 36, 0.96);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
            z-index: 1000;
            transition: var(--transition);
        }
        .site-header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 100%;
        }
        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 22px;
            font-weight: 800;
            color: var(--text-light);
            letter-spacing: -0.3px;
        }
        .logo i {
            color: var(--secondary);
            font-size: 26px;
        }
        .logo span {
            background: linear-gradient(135deg, #ffffff 60%, var(--accent-light));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .nav-list {
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .nav-list a {
            display: flex;
            align-items: center;
            gap: 6px;
            padding: 8px 20px;
            border-radius: var(--radius-sm);
            font-size: 15px;
            font-weight: 500;
            color: rgba(255, 255, 255, 0.75);
            transition: var(--transition);
        }
        .nav-list a:hover,
        .nav-list a:focus-visible {
            color: #ffffff;
            background: rgba(255, 255, 255, 0.08);
        }
        .nav-list a.active {
            color: #ffffff;
            background: rgba(232, 77, 59, 0.25);
            box-shadow: inset 0 0 0 1px rgba(232, 77, 59, 0.3);
        }
        .nav-cta {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 10px 28px;
            border-radius: var(--radius-sm);
            font-size: 15px;
            font-weight: 600;
            color: #ffffff;
            background: var(--secondary);
            transition: var(--transition);
            margin-left: 12px;
        }
        .nav-cta:hover,
        .nav-cta:focus-visible {
            background: var(--secondary-hover);
            transform: translateY(-1px);
            box-shadow: 0 6px 20px rgba(232, 77, 59, 0.35);
        }
        .nav-toggle {
            display: none;
            font-size: 24px;
            color: #ffffff;
            background: none;
            padding: 6px 10px;
            border-radius: var(--radius-sm);
        }
        .nav-toggle:hover {
            background: rgba(255, 255, 255, 0.08);
        }

        /* ===== Mobile Nav ===== */
        @media (max-width: 768px) {
            .nav-list {
                position: fixed;
                top: var(--header-h);
                left: 0;
                right: 0;
                background: rgba(15, 23, 36, 0.98);
                backdrop-filter: blur(16px);
                -webkit-backdrop-filter: blur(16px);
                flex-direction: column;
                padding: 20px 24px 32px;
                gap: 4px;
                border-bottom: 1px solid rgba(255, 255, 255, 0.06);
                transform: translateY(-120%);
                opacity: 0;
                pointer-events: none;
                transition: var(--transition);
            }
            .nav-list.open {
                transform: translateY(0);
                opacity: 1;
                pointer-events: auto;
            }
            .nav-list a {
                width: 100%;
                padding: 12px 16px;
                font-size: 16px;
                border-radius: var(--radius-sm);
            }
            .nav-list a.active {
                background: rgba(232, 77, 59, 0.2);
            }
            .nav-cta {
                width: 100%;
                justify-content: center;
                margin-left: 0;
                margin-top: 8px;
                padding: 14px 28px;
            }
            .nav-toggle {
                display: block;
            }
        }

        /* ===== Hero ===== */
        .hero {
            position: relative;
            min-height: 100vh;
            display: flex;
            align-items: center;
            padding: 120px 0 80px;
            background: var(--bg-dark);
            overflow: hidden;
        }
        .hero-bg {
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
            opacity: 0.35;
            transform: scale(1.05);
            animation: heroZoom 20s ease-in-out infinite alternate;
        }
        @keyframes heroZoom {
            0% {
                transform: scale(1.05);
            }
            100% {
                transform: scale(1.15);
            }
        }
        .hero-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(160deg, rgba(15, 23, 36, 0.88) 0%, rgba(10, 14, 23, 0.70) 50%, rgba(15, 23, 36, 0.92) 100%);
        }
        .hero .container {
            position: relative;
            z-index: 2;
            text-align: center;
            max-width: 820px;
        }
        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 6px 20px;
            border-radius: 50px;
            background: rgba(232, 77, 59, 0.18);
            border: 1px solid rgba(232, 77, 59, 0.25);
            color: var(--secondary);
            font-size: 14px;
            font-weight: 500;
            letter-spacing: 0.5px;
            margin-bottom: 24px;
        }
        .hero-badge i {
            font-size: 12px;
        }
        .hero h1 {
            font-size: clamp(38px, 7vw, 72px);
            font-weight: 800;
            color: var(--text-light);
            line-height: 1.15;
            letter-spacing: -1px;
            margin-bottom: 20px;
        }
        .hero h1 span {
            background: linear-gradient(135deg, var(--secondary), var(--accent-light));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .hero p {
            font-size: clamp(16px, 2vw, 20px);
            color: rgba(255, 255, 255, 0.7);
            max-width: 640px;
            margin: 0 auto 36px;
            line-height: 1.7;
        }
        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            justify-content: center;
        }
        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 16px 40px;
            border-radius: var(--radius-sm);
            font-size: 17px;
            font-weight: 600;
            color: #ffffff;
            background: var(--secondary);
            transition: var(--transition);
        }
        .btn-primary:hover,
        .btn-primary:focus-visible {
            background: var(--secondary-hover);
            transform: translateY(-2px);
            box-shadow: 0 12px 32px rgba(232, 77, 59, 0.35);
        }
        .btn-outline {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 16px 40px;
            border-radius: var(--radius-sm);
            font-size: 17px;
            font-weight: 600;
            color: rgba(255, 255, 255, 0.9);
            border: 1.5px solid rgba(255, 255, 255, 0.25);
            background: transparent;
            transition: var(--transition);
        }
        .btn-outline:hover,
        .btn-outline:focus-visible {
            border-color: var(--secondary);
            background: rgba(232, 77, 59, 0.10);
            transform: translateY(-2px);
        }
        .hero-stats {
            display: flex;
            flex-wrap: wrap;
            gap: 40px;
            justify-content: center;
            margin-top: 56px;
            padding-top: 40px;
            border-top: 1px solid rgba(255, 255, 255, 0.08);
        }
        .hero-stat {
            text-align: center;
        }
        .hero-stat .num {
            font-size: 32px;
            font-weight: 800;
            color: #ffffff;
            letter-spacing: -0.5px;
        }
        .hero-stat .num span {
            color: var(--accent);
        }
        .hero-stat .label {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.5);
            margin-top: 4px;
        }

        /* ===== Section common ===== */
        .section {
            padding: 80px 0;
        }
        .section-dark {
            background: var(--bg-dark);
            color: var(--text-light);
        }
        .section-dark h2,
        .section-dark h3 {
            color: var(--text-light);
        }
        .section-muted {
            background: var(--bg-muted);
        }
        .section-header {
            text-align: center;
            max-width: 680px;
            margin: 0 auto 52px;
        }
        .section-header h2 {
            font-size: clamp(28px, 4vw, 40px);
            font-weight: 800;
            letter-spacing: -0.5px;
            margin-bottom: 12px;
        }
        .section-header p {
            font-size: 17px;
            color: var(--text-secondary);
            line-height: 1.7;
        }
        .section-dark .section-header p {
            color: rgba(255, 255, 255, 0.6);
        }
        .section-tag {
            display: inline-block;
            padding: 4px 16px;
            border-radius: 50px;
            background: rgba(232, 77, 59, 0.12);
            color: var(--secondary);
            font-size: 13px;
            font-weight: 600;
            letter-spacing: 0.5px;
            margin-bottom: 12px;
        }

        /* ===== Features ===== */
        .features-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
            gap: 28px;
        }
        .feature-card {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            padding: 36px 28px;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
            transition: var(--transition);
        }
        .feature-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
            border-color: rgba(232, 77, 59, 0.15);
        }
        .feature-card .icon {
            width: 52px;
            height: 52px;
            border-radius: var(--radius-sm);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 22px;
            color: #ffffff;
            background: var(--primary);
            margin-bottom: 18px;
        }
        .feature-card .icon.accent {
            background: var(--secondary);
        }
        .feature-card .icon.gold {
            background: var(--accent);
        }
        .feature-card h3 {
            font-size: 19px;
            font-weight: 700;
            margin-bottom: 8px;
        }
        .feature-card p {
            font-size: 15px;
            color: var(--text-secondary);
            line-height: 1.6;
        }

        /* ===== Categories ===== */
        .categories-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 28px;
        }
        .category-card {
            position: relative;
            border-radius: var(--radius-md);
            overflow: hidden;
            background: var(--bg-card);
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
            transition: var(--transition);
        }
        .category-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
        }
        .category-card .thumb {
            height: 200px;
            background: var(--bg-dark);
            position: relative;
            overflow: hidden;
        }
        .category-card .thumb img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: var(--transition);
        }
        .category-card:hover .thumb img {
            transform: scale(1.06);
        }
        .category-card .thumb .overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(0deg, rgba(15, 23, 36, 0.5) 0%, transparent 60%);
        }
        .category-card .body {
            padding: 22px 24px 26px;
        }
        .category-card .body h3 {
            font-size: 19px;
            font-weight: 700;
            margin-bottom: 6px;
        }
        .category-card .body p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.6;
            margin-bottom: 14px;
        }
        .category-card .body .tag {
            display: inline-block;
            padding: 3px 14px;
            border-radius: 50px;
            background: rgba(232, 77, 59, 0.10);
            color: var(--secondary);
            font-size: 12px;
            font-weight: 600;
        }

        /* ===== News / CMS List ===== */
        .news-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
            gap: 28px;
        }
        .news-card {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
            transition: var(--transition);
        }
        .news-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
        }
        .news-card .thumb {
            height: 200px;
            background: var(--bg-dark);
            position: relative;
            overflow: hidden;
        }
        .news-card .thumb img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: var(--transition);
        }
        .news-card:hover .thumb img {
            transform: scale(1.06);
        }
        .news-card .body {
            padding: 22px 24px 26px;
        }
        .news-card .body .meta {
            display: flex;
            align-items: center;
            gap: 12px;
            font-size: 13px;
            color: var(--text-muted);
            margin-bottom: 10px;
        }
        .news-card .body .meta .cat {
            padding: 2px 12px;
            border-radius: 50px;
            background: rgba(232, 77, 59, 0.10);
            color: var(--secondary);
            font-weight: 600;
            font-size: 12px;
        }
        .news-card .body h3 {
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 8px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .news-card .body p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.6;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .news-empty {
            grid-column: 1 / -1;
            text-align: center;
            padding: 48px 24px;
            color: var(--text-muted);
            font-size: 16px;
            background: var(--bg-card);
            border-radius: var(--radius-md);
            border: 1px dashed var(--border);
        }

        /* ===== Data / Stats ===== */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
            gap: 28px;
            text-align: center;
        }
        .stat-item {
            padding: 32px 20px;
            background: rgba(255, 255, 255, 0.04);
            border-radius: var(--radius-md);
            border: 1px solid rgba(255, 255, 255, 0.06);
            transition: var(--transition);
        }
        .stat-item:hover {
            background: rgba(255, 255, 255, 0.08);
            transform: translateY(-2px);
        }
        .stat-item .num {
            font-size: 40px;
            font-weight: 800;
            color: var(--accent);
            letter-spacing: -1px;
            line-height: 1.2;
        }
        .stat-item .label {
            font-size: 15px;
            color: rgba(255, 255, 255, 0.55);
            margin-top: 6px;
        }

        /* ===== Steps / Process ===== */
        .steps-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
            gap: 32px;
            counter-reset: step;
        }
        .step-card {
            text-align: center;
            padding: 32px 20px;
            background: var(--bg-card);
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
            position: relative;
            transition: var(--transition);
        }
        .step-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
        }
        .step-card .step-num {
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background: var(--primary);
            color: #ffffff;
            font-size: 20px;
            font-weight: 700;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 16px;
        }
        .step-card .step-num.accent {
            background: var(--secondary);
        }
        .step-card .step-num.gold {
            background: var(--accent);
        }
        .step-card h3 {
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 6px;
        }
        .step-card p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.6;
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 760px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .faq-item {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            border: 1px solid var(--border-light);
            overflow: hidden;
            transition: var(--transition);
        }
        .faq-item:hover {
            border-color: rgba(232, 77, 59, 0.15);
        }
        .faq-item summary {
            padding: 20px 24px;
            font-size: 16px;
            font-weight: 600;
            cursor: pointer;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            list-style: none;
            transition: var(--transition);
        }
        .faq-item summary::-webkit-details-marker {
            display: none;
        }
        .faq-item summary::after {
            content: '\f078';
            font-family: 'Font Awesome 6 Free';
            font-weight: 900;
            font-size: 14px;
            color: var(--text-muted);
            transition: var(--transition);
            flex-shrink: 0;
        }
        .faq-item[open] summary::after {
            transform: rotate(180deg);
            color: var(--secondary);
        }
        .faq-item[open] summary {
            border-bottom: 1px solid var(--border-light);
        }
        .faq-item .answer {
            padding: 0 24px 20px;
            font-size: 15px;
            color: var(--text-secondary);
            line-height: 1.7;
        }

        /* ===== CTA ===== */
        .cta-section {
            position: relative;
            padding: 100px 0;
            background: var(--bg-dark);
            overflow: hidden;
        }
        .cta-bg {
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-3.png') center center / cover no-repeat;
            opacity: 0.20;
        }
        .cta-section .container {
            position: relative;
            z-index: 2;
            text-align: center;
        }
        .cta-section h2 {
            font-size: clamp(28px, 4vw, 42px);
            font-weight: 800;
            color: var(--text-light);
            margin-bottom: 12px;
        }
        .cta-section p {
            font-size: 17px;
            color: rgba(255, 255, 255, 0.6);
            max-width: 560px;
            margin: 0 auto 32px;
        }
        .cta-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            justify-content: center;
        }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--primary);
            color: rgba(255, 255, 255, 0.6);
            padding: 52px 0 32px;
            border-top: 1px solid rgba(255, 255, 255, 0.05);
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 36px;
        }
        .footer-brand .logo {
            font-size: 20px;
            margin-bottom: 12px;
        }
        .footer-brand p {
            font-size: 14px;
            line-height: 1.7;
            max-width: 320px;
        }
        .footer-col h4 {
            font-size: 15px;
            font-weight: 700;
            color: #ffffff;
            margin-bottom: 16px;
        }
        .footer-col ul li {
            margin-bottom: 8px;
        }
        .footer-col ul a {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.5);
            transition: var(--transition);
        }
        .footer-col ul a:hover {
            color: var(--secondary);
        }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            padding-top: 24px;
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            align-items: center;
            gap: 12px;
            font-size: 13px;
            color: rgba(255, 255, 255, 0.35);
        }
        .footer-bottom a {
            color: rgba(255, 255, 255, 0.35);
        }
        .footer-bottom a:hover {
            color: var(--secondary);
        }

        @media (max-width: 768px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 28px;
            }
            .footer-brand {
                grid-column: 1 / -1;
            }
        }
        @media (max-width: 520px) {
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
        }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .hero {
                min-height: 80vh;
                padding: 100px 0 60px;
            }
            .hero-stats {
                gap: 24px;
            }
            .hero-stat .num {
                font-size: 26px;
            }
            .section {
                padding: 60px 0;
            }
        }
        @media (max-width: 768px) {
            .hero {
                min-height: 70vh;
                padding: 90px 0 50px;
            }
            .hero h1 {
                font-size: 32px;
            }
            .hero p {
                font-size: 16px;
            }
            .hero-actions {
                flex-direction: column;
                align-items: center;
            }
            .hero-stats {
                flex-direction: column;
                gap: 16px;
                margin-top: 36px;
                padding-top: 28px;
            }
            .section {
                padding: 48px 0;
            }
            .section-header {
                margin-bottom: 36px;
            }
            .features-grid,
            .categories-grid,
            .news-grid {
                grid-template-columns: 1fr;
            }
            .steps-grid {
                grid-template-columns: 1fr 1fr;
            }
            .stats-grid {
                grid-template-columns: 1fr 1fr;
            }
            .cta-section {
                padding: 64px 0;
            }
        }
        @media (max-width: 520px) {
            .hero h1 {
                font-size: 26px;
            }
            .hero p {
                font-size: 15px;
            }
            .steps-grid {
                grid-template-columns: 1fr;
            }
            .stats-grid {
                grid-template-columns: 1fr;
            }
            .section-header h2 {
                font-size: 24px;
            }
            .btn-primary,
            .btn-outline {
                width: 100%;
                justify-content: center;
                padding: 14px 24px;
                font-size: 15px;
            }
            .container {
                padding: 0 16px;
            }
            .hero-badge {
                font-size: 12px;
                padding: 4px 14px;
            }
        }

        /* ===== Focus visible ===== */
        :focus-visible {
            outline: 2px solid var(--secondary);
            outline-offset: 2px;
        }

        /* ===== Smooth scroll padding ===== */
        .section-anchor {
            scroll-margin-top: calc(var(--header-h) + 20px);
        }

/* roulang page: category1 */
/* ===== Design Variables ===== */
        :root {
            --primary: #0d1b2a;
            --primary-light: #1b2d45;
            --secondary: #f5a623;
            --secondary-hover: #e09515;
            --accent: #2ecc71;
            --accent-dark: #27ae60;
            --bg: #f4f6f9;
            --bg-card: #ffffff;
            --bg-dark: #0d1b2a;
            --text: #1a1a2e;
            --text-light: #5a6a7a;
            --text-white: #f0f4f8;
            --text-muted: #8899aa;
            --border: #e2e8f0;
            --border-light: #f0f2f5;
            --radius: 12px;
            --radius-sm: 8px;
            --radius-lg: 20px;
            --shadow-sm: 0 2px 8px rgba(0,0,0,0.06);
            --shadow: 0 8px 30px rgba(0,0,0,0.10);
            --shadow-lg: 0 20px 50px rgba(0,0,0,0.15);
            --shadow-glow: 0 0 30px rgba(245,166,35,0.25);
            --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --container: 1200px;
            --nav-height: 72px;
            --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
        }

        /* ===== Reset & Base ===== */
        *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
        html { scroll-behavior: smooth; -webkit-font-smoothing: antialiased; }
        body {
            font-family: var(--font);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text);
            background: var(--bg);
        }
        a { color: inherit; text-decoration: none; transition: var(--transition); }
        img { max-width: 100%; height: auto; display: block; border-radius: var(--radius-sm); }
        button, input, textarea { font-family: inherit; font-size: inherit; border: none; outline: none; }
        button { cursor: pointer; background: none; }
        ul, ol { list-style: none; }
        h1, h2, h3, h4, h5, h6 { line-height: 1.3; font-weight: 700; color: var(--text); }
        h1 { font-size: 2.8rem; }
        h2 { font-size: 2.2rem; }
        h3 { font-size: 1.4rem; }
        h4 { font-size: 1.15rem; }
        p { margin-bottom: 0.8rem; color: var(--text-light); }
        .container {
            max-width: var(--container);
            margin: 0 auto;
            padding: 0 24px;
        }

        /* ===== Buttons ===== */
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 14px 32px;
            border-radius: 50px;
            font-weight: 600;
            font-size: 1rem;
            transition: var(--transition);
            border: 2px solid transparent;
            background: var(--secondary);
            color: #0d1b2a;
        }
        .btn:hover {
            background: var(--secondary-hover);
            transform: translateY(-3px);
            box-shadow: var(--shadow-glow);
        }
        .btn:active { transform: translateY(0); }
        .btn:focus-visible { outline: 3px solid var(--secondary); outline-offset: 3px; }
        .btn-primary {
            background: var(--secondary);
            color: #0d1b2a;
        }
        .btn-primary:hover { background: var(--secondary-hover); }
        .btn-outline {
            background: transparent;
            border-color: var(--secondary);
            color: var(--secondary);
        }
        .btn-outline:hover { background: var(--secondary); color: #0d1b2a; }
        .btn-dark {
            background: var(--primary);
            color: var(--text-white);
        }
        .btn-dark:hover { background: var(--primary-light); }
        .btn-accent {
            background: var(--accent);
            color: #0d1b2a;
        }
        .btn-accent:hover { background: var(--accent-dark); }
        .btn-lg { padding: 18px 44px; font-size: 1.1rem; }
        .btn-sm { padding: 10px 22px; font-size: 0.9rem; }

        /* ===== Badge / Tag ===== */
        .badge {
            display: inline-block;
            padding: 5px 14px;
            border-radius: 50px;
            font-size: 0.8rem;
            font-weight: 600;
            background: rgba(245,166,35,0.15);
            color: var(--secondary);
            border: 1px solid rgba(245,166,35,0.25);
        }
        .badge-green { background: rgba(46,204,113,0.15); color: var(--accent-dark); border-color: rgba(46,204,113,0.25); }
        .badge-blue { background: rgba(52,152,219,0.15); color: #2980b9; border-color: rgba(52,152,219,0.25); }
        .badge-red { background: rgba(231,76,60,0.15); color: #c0392b; border-color: rgba(231,76,60,0.25); }

        /* ===== Header / Nav ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            z-index: 1000;
            background: rgba(13,27,42,0.95);
            backdrop-filter: blur(14px);
            border-bottom: 1px solid rgba(255,255,255,0.06);
            height: var(--nav-height);
            transition: var(--transition);
        }
        .site-header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 100%;
        }
        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.5rem;
            font-weight: 800;
            color: var(--text-white);
        }
        .logo i { color: var(--secondary); font-size: 1.6rem; }
        .logo span { letter-spacing: 0.5px; }
        .logo:hover { opacity: 0.9; }
        .nav-list {
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .nav-list a {
            padding: 10px 20px;
            border-radius: 50px;
            font-weight: 500;
            color: rgba(255,255,255,0.75);
            font-size: 0.95rem;
            transition: var(--transition);
            position: relative;
        }
        .nav-list a i { margin-right: 6px; font-size: 0.9rem; }
        .nav-list a:hover { color: var(--text-white); background: rgba(255,255,255,0.08); }
        .nav-list a.active {
            color: var(--secondary);
            background: rgba(245,166,35,0.12);
        }
        .nav-list a.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 50%;
            transform: translateX(-50%);
            width: 24px;
            height: 3px;
            border-radius: 3px;
            background: var(--secondary);
        }
        .nav-cta {
            background: var(--secondary) !important;
            color: #0d1b2a !important;
            font-weight: 700 !important;
            padding: 10px 24px !important;
        }
        .nav-cta:hover { background: var(--secondary-hover) !important; transform: translateY(-2px); box-shadow: var(--shadow-glow); }
        .nav-cta i { color: #0d1b2a; }
        .nav-toggle { display: none; color: var(--text-white); font-size: 1.4rem; padding: 8px; }

        /* ===== Hero / Banner ===== */
        .hero-banner {
            position: relative;
            padding: 140px 0 80px;
            background: var(--primary);
            background-image: linear-gradient(135deg, rgba(13,27,42,0.92) 0%, rgba(27,45,69,0.88) 100%), url('/assets/images/backpic/back-1.png');
            background-size: cover;
            background-position: center center;
            background-attachment: fixed;
            color: var(--text-white);
            text-align: center;
            overflow: hidden;
        }
        .hero-banner::before {
            content: '';
            position: absolute;
            top: -50%;
            left: -50%;
            width: 200%;
            height: 200%;
            background: radial-gradient(circle at 30% 50%, rgba(245,166,35,0.08) 0%, transparent 50%);
            pointer-events: none;
        }
        .hero-banner .container { position: relative; z-index: 2; }
        .hero-banner .badge { margin-bottom: 20px; font-size: 0.9rem; padding: 8px 20px; }
        .hero-banner h1 { color: var(--text-white); font-size: 3.2rem; margin-bottom: 16px; letter-spacing: -0.5px; }
        .hero-banner h1 span { color: var(--secondary); }
        .hero-banner p { color: rgba(255,255,255,0.75); font-size: 1.15rem; max-width: 680px; margin: 0 auto 32px; }
        .hero-banner .btn-group { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }
        .hero-stats {
            display: flex;
            justify-content: center;
            gap: 48px;
            margin-top: 48px;
            flex-wrap: wrap;
        }
        .hero-stats .stat-item { text-align: center; }
        .hero-stats .stat-num { font-size: 2.4rem; font-weight: 800; color: var(--secondary); }
        .hero-stats .stat-label { color: rgba(255,255,255,0.6); font-size: 0.95rem; font-weight: 400; }

        /* ===== Section Common ===== */
        .section { padding: 80px 0; }
        .section-alt { background: var(--bg-card); }
        .section-dark { background: var(--bg-dark); color: var(--text-white); }
        .section-dark h2, .section-dark h3, .section-dark .section-sub { color: var(--text-white); }
        .section-dark p { color: rgba(255,255,255,0.7); }
        .section-header { text-align: center; margin-bottom: 50px; }
        .section-header .badge { margin-bottom: 12px; }
        .section-header h2 { margin-bottom: 12px; }
        .section-sub { color: var(--text-light); font-size: 1.1rem; max-width: 620px; margin: 0 auto; }

        /* ===== Category Tags ===== */
        .category-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
            justify-content: center;
            margin-top: 36px;
        }
        .category-tags a {
            padding: 12px 28px;
            border-radius: 50px;
            background: var(--bg-card);
            border: 1px solid var(--border);
            font-weight: 500;
            color: var(--text);
            transition: var(--transition);
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .category-tags a:hover { border-color: var(--secondary); color: var(--secondary); box-shadow: var(--shadow-sm); transform: translateY(-2px); }
        .category-tags a.active { background: var(--secondary); border-color: var(--secondary); color: #0d1b2a; font-weight: 600; }

        /* ===== Cards Grid ===== */
        .card-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
            gap: 28px;
        }
        .card {
            background: var(--bg-card);
            border-radius: var(--radius);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border);
            transition: var(--transition);
            display: flex;
            flex-direction: column;
        }
        .card:hover { transform: translateY(-6px); box-shadow: var(--shadow); border-color: transparent; }
        .card-img {
            width: 100%;
            height: 200px;
            object-fit: cover;
            border-radius: 0;
        }
        .card-body { padding: 24px; flex: 1; display: flex; flex-direction: column; }
        .card-body .badge { align-self: flex-start; margin-bottom: 12px; }
        .card-body h3 { font-size: 1.2rem; margin-bottom: 8px; }
        .card-body h3 a { color: var(--text); }
        .card-body h3 a:hover { color: var(--secondary); }
        .card-body p { font-size: 0.95rem; color: var(--text-light); margin-bottom: 16px; flex: 1; }
        .card-footer {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 16px 24px;
            border-top: 1px solid var(--border-light);
            font-size: 0.85rem;
            color: var(--text-muted);
        }
        .card-footer i { margin-right: 4px; }

        /* ===== Stats / Data Block ===== */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 28px;
        }
        .stat-card {
            background: rgba(255,255,255,0.05);
            border: 1px solid rgba(255,255,255,0.08);
            border-radius: var(--radius);
            padding: 36px 24px;
            text-align: center;
            transition: var(--transition);
        }
        .stat-card:hover { background: rgba(255,255,255,0.08); transform: translateY(-4px); }
        .stat-card .stat-icon { font-size: 2.2rem; color: var(--secondary); margin-bottom: 12px; }
        .stat-card .stat-num { font-size: 2.6rem; font-weight: 800; color: var(--text-white); line-height: 1.2; }
        .stat-card .stat-label { color: rgba(255,255,255,0.6); font-size: 0.95rem; margin-top: 6px; }

        /* ===== Process / Steps ===== */
        .process-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 28px;
        }
        .process-step {
            text-align: center;
            padding: 32px 20px;
            background: var(--bg-card);
            border-radius: var(--radius);
            border: 1px solid var(--border);
            position: relative;
            transition: var(--transition);
        }
        .process-step:hover { transform: translateY(-4px); box-shadow: var(--shadow); }
        .process-step .step-num {
            width: 56px;
            height: 56px;
            border-radius: 50%;
            background: var(--secondary);
            color: #0d1b2a;
            font-weight: 800;
            font-size: 1.4rem;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 16px;
        }
        .process-step h4 { margin-bottom: 8px; }
        .process-step p { font-size: 0.92rem; color: var(--text-light); }
        .process-step::after {
            content: '→';
            position: absolute;
            right: -18px;
            top: 50%;
            transform: translateY(-50%);
            font-size: 1.8rem;
            color: var(--secondary);
            font-weight: 300;
            opacity: 0.5;
        }
        .process-step:last-child::after { display: none; }

        /* ===== FAQ ===== */
        .faq-list { max-width: 780px; margin: 0 auto; }
        .faq-item {
            background: var(--bg-card);
            border-radius: var(--radius-sm);
            border: 1px solid var(--border);
            margin-bottom: 12px;
            overflow: hidden;
            transition: var(--transition);
        }
        .faq-item:hover { border-color: var(--secondary); }
        .faq-question {
            padding: 20px 24px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            font-weight: 600;
            font-size: 1.05rem;
            cursor: pointer;
            transition: var(--transition);
            color: var(--text);
            background: none;
            width: 100%;
            text-align: left;
        }
        .faq-question i { color: var(--secondary); transition: var(--transition); font-size: 1.1rem; }
        .faq-question[aria-expanded="true"] i { transform: rotate(180deg); }
        .faq-question:hover { background: rgba(245,166,35,0.04); }
        .faq-answer {
            padding: 0 24px 20px;
            color: var(--text-light);
            font-size: 0.95rem;
            line-height: 1.7;
            display: none;
        }
        .faq-answer.open { display: block; }

        /* ===== CTA ===== */
        .cta-section {
            background: var(--primary);
            background-image: linear-gradient(135deg, rgba(13,27,42,0.93) 0%, rgba(27,45,69,0.90) 100%), url('/assets/images/backpic/back-2.png');
            background-size: cover;
            background-position: center;
            padding: 80px 0;
            text-align: center;
            color: var(--text-white);
        }
        .cta-section h2 { color: var(--text-white); font-size: 2.4rem; margin-bottom: 16px; }
        .cta-section p { color: rgba(255,255,255,0.7); max-width: 560px; margin: 0 auto 32px; font-size: 1.1rem; }
        .cta-section .btn-group { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--primary);
            color: var(--text-white);
            padding: 60px 0 0;
            border-top: 1px solid rgba(255,255,255,0.06);
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            padding-bottom: 40px;
            border-bottom: 1px solid rgba(255,255,255,0.06);
        }
        .footer-brand .logo { margin-bottom: 16px; }
        .footer-brand p { color: rgba(255,255,255,0.6); font-size: 0.92rem; max-width: 320px; }
        .footer-col h4 { color: var(--text-white); font-size: 1rem; font-weight: 600; margin-bottom: 16px; }
        .footer-col ul li { margin-bottom: 10px; }
        .footer-col ul li a { color: rgba(255,255,255,0.6); font-size: 0.92rem; transition: var(--transition); }
        .footer-col ul li a:hover { color: var(--secondary); padding-left: 4px; }
        .footer-bottom {
            padding: 24px 0;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 0.88rem;
            color: rgba(255,255,255,0.45);
        }
        .footer-bottom span:last-child { color: var(--secondary); font-weight: 500; }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .stats-grid { grid-template-columns: repeat(2, 1fr); }
            .process-grid { grid-template-columns: repeat(2, 1fr); }
            .process-step::after { display: none; }
            .footer-grid { grid-template-columns: 1fr 1fr; }
        }
        @media (max-width: 768px) {
            .nav-list { display: none; flex-direction: column; background: var(--primary); position: absolute; top: var(--nav-height); left: 0; width: 100%; padding: 20px 24px; gap: 6px; border-bottom: 1px solid rgba(255,255,255,0.06); }
            .nav-list.open { display: flex; }
            .nav-list a { padding: 12px 20px; width: 100%; border-radius: var(--radius-sm); }
            .nav-list a.active::after { display: none; }
            .nav-toggle { display: block; }
            .hero-banner h1 { font-size: 2.2rem; }
            .hero-banner p { font-size: 1rem; }
            .hero-stats { gap: 24px; }
            .hero-stats .stat-num { font-size: 1.8rem; }
            .section { padding: 56px 0; }
            h2 { font-size: 1.8rem; }
            .card-grid { grid-template-columns: 1fr; }
            .stats-grid { grid-template-columns: 1fr 1fr; gap: 16px; }
            .process-grid { grid-template-columns: 1fr; }
            .footer-grid { grid-template-columns: 1fr; gap: 28px; }
            .footer-bottom { flex-direction: column; text-align: center; }
            .cta-section h2 { font-size: 1.8rem; }
            .hero-banner { padding: 120px 0 60px; }
        }
        @media (max-width: 520px) {
            .container { padding: 0 16px; }
            .hero-banner h1 { font-size: 1.7rem; }
            .hero-stats { gap: 16px; }
            .hero-stats .stat-item { flex: 1 1 40%; }
            .stats-grid { grid-template-columns: 1fr 1fr; gap: 12px; }
            .stat-card { padding: 24px 16px; }
            .stat-card .stat-num { font-size: 2rem; }
            .btn-lg { padding: 14px 28px; font-size: 1rem; }
            .section-header h2 { font-size: 1.5rem; }
            .card-grid { gap: 20px; }
            .category-tags a { padding: 10px 18px; font-size: 0.85rem; }
        }

        /* ===== Scrollbar ===== */
        ::-webkit-scrollbar { width: 8px; }
        ::-webkit-scrollbar-track { background: var(--bg); }
        ::-webkit-scrollbar-thumb { background: var(--text-muted); border-radius: 10px; }
        ::-webkit-scrollbar-thumb:hover { background: var(--text-light); }

        /* ===== Selection ===== */
        ::selection { background: var(--secondary); color: #0d1b2a; }

        /* ===== Accessibility ===== */
        :focus-visible { outline: 3px solid var(--secondary); outline-offset: 2px; }
        .skip-link { position: absolute; top: -100px; left: 0; background: var(--secondary); color: #0d1b2a; padding: 12px 24px; z-index: 10000; font-weight: 600; }
        .skip-link:focus { top: 0; }

/* roulang page: article */
/* ===== 设计变量 ===== */
        :root {
            --primary: #0f0c29;
            --primary-light: #302b63;
            --primary-dark: #05040e;
            --accent: #f0a500;
            --accent-hover: #d49400;
            --accent-glow: rgba(240, 165, 0, 0.35);
            --danger: #e94560;
            --bg: #f4f5f9;
            --bg-card: #ffffff;
            --bg-dark: #0f0c29;
            --text: #1a1a2e;
            --text-light: #5a5a7a;
            --text-white: #f0f0f5;
            --border: #e0e0ea;
            --radius: 16px;
            --radius-sm: 10px;
            --radius-xs: 6px;
            --shadow: 0 8px 32px rgba(15, 12, 41, 0.08);
            --shadow-hover: 0 16px 48px rgba(15, 12, 41, 0.14);
            --shadow-glow: 0 0 40px rgba(240, 165, 0, 0.15);
            --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font: 'Segoe UI', system-ui, -apple-system, sans-serif;
            --max-width: 1200px;
            --header-h: 72px;
        }

        /* ===== Reset & Base ===== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }
        body {
            font-family: var(--font);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text);
            background: var(--bg);
            -webkit-font-smoothing: antialiased;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        a {
            color: inherit;
            text-decoration: none;
            transition: color var(--transition);
        }
        button,
        input,
        textarea {
            font: inherit;
            border: none;
            outline: none;
            background: none;
        }
        ul {
            list-style: none;
        }

        /* ===== Container ===== */
        .container {
            width: 100%;
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
        }
        @media (max-width: 768px) {
            .container {
                padding: 0 16px;
            }
        }

        /* ===== Header / Nav ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            background: rgba(15, 12, 41, 0.92);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid rgba(240, 165, 0, 0.15);
            height: var(--header-h);
            transition: background var(--transition);
        }
        .site-header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 100%;
        }
        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 22px;
            font-weight: 700;
            color: var(--text-white);
            letter-spacing: 0.5px;
        }
        .logo i {
            color: var(--accent);
            font-size: 26px;
            filter: drop-shadow(0 0 8px var(--accent-glow));
        }
        .logo span {
            background: linear-gradient(135deg, #f0a500, #ffd700);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .nav-list {
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .nav-list a {
            padding: 8px 18px;
            border-radius: var(--radius-sm);
            font-size: 15px;
            font-weight: 500;
            color: rgba(240, 245, 255, 0.75);
            transition: all var(--transition);
            position: relative;
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .nav-list a i {
            font-size: 15px;
        }
        .nav-list a:hover {
            color: #fff;
            background: rgba(240, 165, 0, 0.12);
        }
        .nav-list a.active {
            color: #fff;
            background: rgba(240, 165, 0, 0.18);
        }
        .nav-list a.active::after {
            content: '';
            position: absolute;
            bottom: 4px;
            left: 50%;
            transform: translateX(-50%);
            width: 20px;
            height: 3px;
            border-radius: 4px;
            background: var(--accent);
            box-shadow: 0 0 12px var(--accent-glow);
        }
        .nav-cta {
            background: linear-gradient(135deg, var(--accent), #ffb800) !important;
            color: #0f0c29 !important;
            font-weight: 700 !important;
            padding: 8px 24px !important;
            border-radius: var(--radius-sm) !important;
            box-shadow: 0 4px 20px var(--accent-glow);
            transition: all var(--transition) !important;
            margin-left: 8px;
        }
        .nav-cta i {
            color: #0f0c29 !important;
        }
        .nav-cta:hover {
            transform: translateY(-2px) scale(1.02);
            box-shadow: 0 8px 32px var(--accent-glow) !important;
            background: linear-gradient(135deg, #ffb800, #ffd700) !important;
        }
        .nav-toggle {
            display: none;
            font-size: 26px;
            color: var(--text-white);
            cursor: pointer;
            padding: 4px 8px;
            border-radius: var(--radius-xs);
            transition: background var(--transition);
        }
        .nav-toggle:hover {
            background: rgba(255, 255, 255, 0.08);
        }
        @media (max-width: 768px) {
            .nav-list {
                position: fixed;
                top: var(--header-h);
                left: 0;
                right: 0;
                background: rgba(15, 12, 41, 0.98);
                backdrop-filter: blur(20px);
                flex-direction: column;
                padding: 20px 24px;
                gap: 4px;
                transform: translateY(-120%);
                opacity: 0;
                pointer-events: none;
                transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
                border-bottom: 1px solid rgba(240, 165, 0, 0.1);
                max-height: calc(100vh - var(--header-h));
                overflow-y: auto;
            }
            .nav-list.open {
                transform: translateY(0);
                opacity: 1;
                pointer-events: all;
            }
            .nav-list a {
                padding: 14px 18px;
                font-size: 16px;
                width: 100%;
                border-radius: var(--radius-xs);
            }
            .nav-list a.active::after {
                display: none;
            }
            .nav-list a.active {
                background: rgba(240, 165, 0, 0.2);
                border-left: 3px solid var(--accent);
            }
            .nav-cta {
                margin-left: 0;
                margin-top: 8px;
                text-align: center;
                justify-content: center;
            }
            .nav-toggle {
                display: block;
            }
        }

        /* ===== Hero / Banner ===== */
        .article-hero {
            margin-top: var(--header-h);
            min-height: 340px;
            display: flex;
            align-items: center;
            position: relative;
            background: var(--primary-dark) url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
            isolation: isolate;
            overflow: hidden;
        }
        .article-hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(15, 12, 41, 0.88) 0%, rgba(48, 43, 99, 0.72) 60%, rgba(15, 12, 41, 0.6) 100%);
            z-index: 1;
        }
        .article-hero::after {
            content: '';
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at 30% 50%, rgba(240, 165, 0, 0.08), transparent 70%);
            z-index: 1;
        }
        .article-hero .container {
            position: relative;
            z-index: 2;
            padding-top: 48px;
            padding-bottom: 48px;
        }
        .article-hero .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 14px;
            color: rgba(255, 255, 255, 0.6);
            margin-bottom: 20px;
            flex-wrap: wrap;
        }
        .article-hero .breadcrumb a {
            color: rgba(255, 255, 255, 0.7);
            transition: color var(--transition);
        }
        .article-hero .breadcrumb a:hover {
            color: var(--accent);
        }
        .article-hero .breadcrumb .sep {
            color: rgba(255, 255, 255, 0.3);
        }
        .article-hero .breadcrumb .current {
            color: var(--accent);
            font-weight: 500;
        }
        .article-hero h1 {
            font-size: clamp(28px, 4vw, 48px);
            font-weight: 800;
            color: #fff;
            line-height: 1.2;
            max-width: 900px;
            text-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
            margin-bottom: 16px;
        }
        .article-hero .meta {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 16px 28px;
            font-size: 15px;
            color: rgba(255, 255, 255, 0.75);
        }
        .article-hero .meta span {
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .article-hero .meta i {
            color: var(--accent);
            font-size: 14px;
        }
        .article-hero .meta .cat-badge {
            background: rgba(240, 165, 0, 0.2);
            color: var(--accent);
            padding: 2px 14px;
            border-radius: 20px;
            font-size: 13px;
            font-weight: 600;
            border: 1px solid rgba(240, 165, 0, 0.25);
        }
        @media (max-width: 768px) {
            .article-hero {
                min-height: 260px;
            }
            .article-hero .container {
                padding-top: 32px;
                padding-bottom: 32px;
            }
            .article-hero h1 {
                font-size: 24px;
            }
            .article-hero .meta {
                font-size: 13px;
                gap: 10px 18px;
            }
        }

        /* ===== Main Content ===== */
        .article-main {
            padding: 48px 0 64px;
        }
        .article-layout {
            display: grid;
            grid-template-columns: 1fr 320px;
            gap: 48px;
            align-items: start;
        }
        .article-body {
            background: var(--bg-card);
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            padding: 40px 44px;
            overflow: hidden;
        }
        .article-body .article-content {
            font-size: 17px;
            line-height: 1.9;
            color: var(--text);
        }
        .article-body .article-content p {
            margin-bottom: 1.4em;
        }
        .article-body .article-content h2,
        .article-body .article-content h3 {
            margin-top: 1.6em;
            margin-bottom: 0.6em;
            font-weight: 700;
            color: var(--primary);
        }
        .article-body .article-content h2 {
            font-size: 24px;
        }
        .article-body .article-content h3 {
            font-size: 20px;
        }
        .article-body .article-content ul,
        .article-body .article-content ol {
            margin-bottom: 1.4em;
            padding-left: 24px;
        }
        .article-body .article-content li {
            margin-bottom: 0.4em;
        }
        .article-body .article-content ul li {
            list-style: disc;
        }
        .article-body .article-content ol li {
            list-style: decimal;
        }
        .article-body .article-content a {
            color: var(--accent);
            text-decoration: underline;
            text-underline-offset: 2px;
        }
        .article-body .article-content a:hover {
            color: var(--accent-hover);
        }
        .article-body .article-content blockquote {
            border-left: 4px solid var(--accent);
            padding: 16px 20px;
            margin: 1.6em 0;
            background: rgba(240, 165, 0, 0.06);
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            font-style: italic;
            color: var(--text-light);
        }
        .article-body .article-content img {
            border-radius: var(--radius-sm);
            margin: 1.6em 0;
            box-shadow: var(--shadow);
        }
        .article-body .article-content code {
            background: #f0f0f5;
            padding: 2px 8px;
            border-radius: 4px;
            font-size: 0.9em;
        }
        .article-body .article-content pre {
            background: #1a1a2e;
            color: #e0e0ea;
            padding: 20px 24px;
            border-radius: var(--radius-sm);
            overflow-x: auto;
            margin: 1.6em 0;
            font-size: 14px;
            line-height: 1.6;
        }
        .article-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            margin-top: 32px;
            padding-top: 24px;
            border-top: 1px solid var(--border);
        }
        .article-tags .tag {
            display: inline-block;
            padding: 4px 16px;
            border-radius: 20px;
            font-size: 13px;
            font-weight: 500;
            background: rgba(240, 165, 0, 0.08);
            color: var(--accent);
            border: 1px solid rgba(240, 165, 0, 0.15);
            transition: all var(--transition);
        }
        .article-tags .tag:hover {
            background: rgba(240, 165, 0, 0.18);
            transform: translateY(-1px);
        }
        .article-nav-links {
            display: flex;
            justify-content: space-between;
            margin-top: 32px;
            padding-top: 20px;
            border-top: 1px solid var(--border);
            gap: 16px;
            flex-wrap: wrap;
        }
        .article-nav-links a {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 14px;
            font-weight: 500;
            color: var(--text-light);
            transition: color var(--transition);
            padding: 6px 0;
        }
        .article-nav-links a:hover {
            color: var(--accent);
        }
        .article-nav-links a i {
            font-size: 13px;
        }

        /* ===== Sidebar ===== */
        .article-sidebar {
            display: flex;
            flex-direction: column;
            gap: 32px;
        }
        .sidebar-card {
            background: var(--bg-card);
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            padding: 28px 24px;
        }
        .sidebar-card h3 {
            font-size: 18px;
            font-weight: 700;
            color: var(--primary);
            margin-bottom: 16px;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .sidebar-card h3 i {
            color: var(--accent);
        }
        .sidebar-list li {
            padding: 10px 0;
            border-bottom: 1px solid var(--border);
        }
        .sidebar-list li:last-child {
            border-bottom: none;
        }
        .sidebar-list a {
            display: flex;
            align-items: flex-start;
            gap: 12px;
            font-size: 14px;
            line-height: 1.5;
            color: var(--text);
            transition: color var(--transition);
        }
        .sidebar-list a:hover {
            color: var(--accent);
        }
        .sidebar-list a .num {
            flex-shrink: 0;
            width: 24px;
            height: 24px;
            border-radius: 50%;
            background: rgba(240, 165, 0, 0.1);
            color: var(--accent);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 12px;
            font-weight: 700;
        }
        .sidebar-list a .text {
            flex: 1;
        }
        .sidebar-list a .text .title {
            display: block;
            font-weight: 500;
        }
        .sidebar-list a .text .date {
            display: block;
            font-size: 12px;
            color: var(--text-light);
            margin-top: 2px;
        }
        .sidebar-cta {
            background: linear-gradient(135deg, var(--primary), var(--primary-light));
            border-radius: var(--radius);
            padding: 32px 24px;
            text-align: center;
            color: var(--text-white);
            box-shadow: var(--shadow);
        }
        .sidebar-cta h3 {
            font-size: 20px;
            font-weight: 700;
            margin-bottom: 8px;
        }
        .sidebar-cta p {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.7);
            margin-bottom: 20px;
        }
        .sidebar-cta .btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: var(--accent);
            color: #0f0c29;
            padding: 12px 32px;
            border-radius: var(--radius-sm);
            font-weight: 700;
            font-size: 15px;
            transition: all var(--transition);
            box-shadow: 0 4px 20px var(--accent-glow);
        }
        .sidebar-cta .btn:hover {
            transform: translateY(-3px);
            box-shadow: 0 8px 32px var(--accent-glow);
            background: #ffb800;
        }

        /* ===== Related Section ===== */
        .related-section {
            padding: 64px 0;
            background: var(--bg-card);
        }
        .related-section .section-title {
            font-size: 28px;
            font-weight: 800;
            color: var(--primary);
            margin-bottom: 8px;
        }
        .related-section .section-sub {
            font-size: 16px;
            color: var(--text-light);
            margin-bottom: 36px;
        }
        .related-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }
        .related-card {
            background: var(--bg);
            border-radius: var(--radius);
            overflow: hidden;
            box-shadow: var(--shadow);
            transition: all var(--transition);
            border: 1px solid var(--border);
        }
        .related-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-hover);
            border-color: rgba(240, 165, 0, 0.2);
        }
        .related-card .card-img {
            aspect-ratio: 16 / 10;
            overflow: hidden;
            position: relative;
            background: var(--primary-dark);
        }
        .related-card .card-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s ease;
        }
        .related-card:hover .card-img img {
            transform: scale(1.06);
        }
        .related-card .card-img .overlay {
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            padding: 12px 16px;
            background: linear-gradient(transparent, rgba(15, 12, 41, 0.7));
        }
        .related-card .card-img .overlay .cat {
            font-size: 12px;
            color: var(--accent);
            font-weight: 600;
        }
        .related-card .card-body {
            padding: 18px 20px 20px;
        }
        .related-card .card-body h4 {
            font-size: 16px;
            font-weight: 700;
            line-height: 1.4;
            margin-bottom: 8px;
            color: var(--text);
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .related-card .card-body h4 a:hover {
            color: var(--accent);
        }
        .related-card .card-body .meta {
            font-size: 13px;
            color: var(--text-light);
            display: flex;
            align-items: center;
            gap: 12px;
        }
        .related-card .card-body .meta i {
            font-size: 12px;
        }
        @media (max-width: 1024px) {
            .related-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .article-layout {
                grid-template-columns: 1fr;
            }
        }
        @media (max-width: 520px) {
            .related-grid {
                grid-template-columns: 1fr;
            }
            .article-body {
                padding: 24px 18px;
            }
        }

        /* ===== FAQ ===== */
        .faq-section {
            padding: 64px 0;
            background: var(--bg);
        }
        .faq-section .section-title {
            font-size: 28px;
            font-weight: 800;
            color: var(--primary);
            text-align: center;
            margin-bottom: 8px;
        }
        .faq-section .section-sub {
            text-align: center;
            font-size: 16px;
            color: var(--text-light);
            margin-bottom: 40px;
        }
        .faq-grid {
            max-width: 800px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .faq-item {
            background: var(--bg-card);
            border-radius: var(--radius-sm);
            box-shadow: var(--shadow);
            border: 1px solid var(--border);
            overflow: hidden;
            transition: all var(--transition);
        }
        .faq-item:hover {
            border-color: rgba(240, 165, 0, 0.2);
        }
        .faq-question {
            width: 100%;
            padding: 18px 24px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            font-size: 16px;
            font-weight: 600;
            color: var(--text);
            cursor: pointer;
            background: none;
            text-align: left;
            transition: background var(--transition);
        }
        .faq-question:hover {
            background: rgba(240, 165, 0, 0.04);
        }
        .faq-question .icon {
            flex-shrink: 0;
            width: 28px;
            height: 28px;
            border-radius: 50%;
            background: rgba(240, 165, 0, 0.1);
            color: var(--accent);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 14px;
            transition: transform 0.3s ease;
        }
        .faq-item.open .faq-question .icon {
            transform: rotate(45deg);
            background: var(--accent);
            color: #fff;
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease, padding 0.3s ease;
            padding: 0 24px;
            color: var(--text-light);
            font-size: 15px;
            line-height: 1.7;
        }
        .faq-item.open .faq-answer {
            max-height: 400px;
            padding: 0 24px 20px;
        }

        /* ===== CTA ===== */
        .cta-section {
            padding: 64px 0;
            background: var(--primary-dark) url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
            position: relative;
            isolation: isolate;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(15, 12, 41, 0.9), rgba(48, 43, 99, 0.75));
            z-index: 1;
        }
        .cta-section .container {
            position: relative;
            z-index: 2;
            text-align: center;
        }
        .cta-section h2 {
            font-size: clamp(26px, 3.5vw, 40px);
            font-weight: 800;
            color: #fff;
            margin-bottom: 12px;
        }
        .cta-section p {
            font-size: 17px;
            color: rgba(255, 255, 255, 0.75);
            max-width: 600px;
            margin: 0 auto 32px;
        }
        .cta-section .btn-group {
            display: flex;
            justify-content: center;
            gap: 16px;
            flex-wrap: wrap;
        }
        .cta-section .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            background: var(--accent);
            color: #0f0c29;
            padding: 14px 40px;
            border-radius: var(--radius-sm);
            font-weight: 700;
            font-size: 17px;
            transition: all var(--transition);
            box-shadow: 0 4px 28px var(--accent-glow);
        }
        .cta-section .btn-primary:hover {
            transform: translateY(-3px);
            box-shadow: 0 12px 40px var(--accent-glow);
            background: #ffb800;
        }
        .cta-section .btn-outline {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            background: transparent;
            color: #fff;
            padding: 13px 36px;
            border-radius: var(--radius-sm);
            font-weight: 600;
            font-size: 16px;
            border: 2px solid rgba(255, 255, 255, 0.25);
            transition: all var(--transition);
        }
        .cta-section .btn-outline:hover {
            border-color: var(--accent);
            background: rgba(240, 165, 0, 0.1);
            transform: translateY(-2px);
        }

        /* ===== Footer ===== */
        .site-footer {
            background: #0a0818;
            color: rgba(255, 255, 255, 0.7);
            padding: 48px 0 24px;
            border-top: 1px solid rgba(240, 165, 0, 0.08);
        }
        .site-footer .footer-grid {
            display: grid;
            grid-template-columns: 1.5fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 36px;
        }
        .site-footer .footer-brand .logo {
            margin-bottom: 14px;
            font-size: 20px;
        }
        .site-footer .footer-brand p {
            font-size: 14px;
            line-height: 1.7;
            color: rgba(255, 255, 255, 0.55);
            max-width: 320px;
        }
        .site-footer .footer-col h4 {
            font-size: 16px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 16px;
        }
        .site-footer .footer-col ul li {
            margin-bottom: 10px;
        }
        .site-footer .footer-col ul a {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.55);
            transition: color var(--transition);
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .site-footer .footer-col ul a:hover {
            color: var(--accent);
        }
        .site-footer .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            padding-top: 20px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 13px;
            color: rgba(255, 255, 255, 0.4);
        }
        .site-footer .footer-bottom span:last-child {
            color: var(--accent);
            font-weight: 500;
        }
        @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;
                gap: 24px;
            }
            .site-footer .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
        }

        /* ===== Error State ===== */
        .error-state {
            padding: 80px 0 100px;
            text-align: center;
        }
        .error-state .err-icon {
            font-size: 64px;
            color: var(--text-light);
            margin-bottom: 20px;
            opacity: 0.4;
        }
        .error-state h2 {
            font-size: 28px;
            font-weight: 800;
            color: var(--text);
            margin-bottom: 12px;
        }
        .error-state p {
            font-size: 16px;
            color: var(--text-light);
            margin-bottom: 28px;
        }
        .error-state .btn-back {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: var(--accent);
            color: #0f0c29;
            padding: 12px 32px;
            border-radius: var(--radius-sm);
            font-weight: 700;
            font-size: 15px;
            transition: all var(--transition);
            box-shadow: 0 4px 20px var(--accent-glow);
        }
        .error-state .btn-back:hover {
            transform: translateY(-3px);
            box-shadow: 0 8px 32px var(--accent-glow);
        }

        /* ===== Utility ===== */
        .text-accent {
            color: var(--accent);
        }
        .mb-0 {
            margin-bottom: 0;
        }
        .mt-1 {
            margin-top: 8px;
        }
        .gap-2 {
            gap: 8px;
        }
        .flex-center {
            display: flex;
            align-items: center;
            justify-content: center;
        }

        /* ===== Smooth scroll offset ===== */
        .anchor-offset {
            scroll-margin-top: calc(var(--header-h) + 20px);
        }

        /* ===== Print ===== */
        @media print {
            .site-header,
            .site-footer,
            .sidebar-card,
            .cta-section,
            .faq-section,
            .related-section,
            .nav-toggle,
            .article-nav-links {
                display: none !important;
            }
            .article-hero {
                min-height: auto;
                padding: 20px 0;
                margin-top: 0;
                background: #fff !important;
            }
            .article-hero::before,
            .article-hero::after {
                display: none;
            }
            .article-hero h1 {
                color: #000;
                text-shadow: none;
            }
            .article-hero .meta {
                color: #666;
            }
            .article-body {
                box-shadow: none;
                padding: 20px 0;
            }
            .article-layout {
                grid-template-columns: 1fr;
            }
            body {
                background: #fff;
            }
        }