/* roulang page: index */
/* ===== 设计变量 ===== */
        :root {
            --primary: #1a2a6c;
            --primary-light: #2d4a8e;
            --primary-dark: #0f1a4a;
            --accent: #f5a623;
            --accent-light: #ffc857;
            --accent-dark: #d48f1a;
            --bg-body: #f8f9fc;
            --bg-card: #ffffff;
            --bg-alt: #eef1f8;
            --bg-dark: #0f1a4a;
            --text-primary: #1a1a2e;
            --text-secondary: #4a4a6a;
            --text-light: #7a7a9a;
            --text-white: #ffffff;
            --border: #e0e4ef;
            --radius-sm: 8px;
            --radius-md: 14px;
            --radius-lg: 24px;
            --shadow-sm: 0 2px 12px rgba(26, 42, 108, 0.06);
            --shadow-md: 0 6px 28px rgba(26, 42, 108, 0.10);
            --shadow-lg: 0 16px 48px rgba(26, 42, 108, 0.14);
            --transition: 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
            --font-base: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
            --container: 1200px;
            --gap: 32px;
        }

        /* ===== 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-base);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text-primary);
            background: var(--bg-body);
            min-height: 100vh;
        }
        a {
            color: var(--primary-light);
            text-decoration: none;
            transition: color var(--transition);
        }
        a:hover {
            color: var(--accent);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        button,
        input,
        textarea {
            font-family: inherit;
            font-size: inherit;
        }
        ul,
        ol {
            list-style: none;
        }

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

        /* ===== Header / Nav ===== */
        .site-header {
            background: var(--bg-card);
            border-bottom: 1px solid var(--border);
            position: sticky;
            top: 0;
            z-index: 100;
            box-shadow: var(--shadow-sm);
            transition: box-shadow var(--transition);
        }
        .site-header.scrolled {
            box-shadow: var(--shadow-md);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 72px;
        }
        .logo a {
            font-size: 22px;
            font-weight: 700;
            color: var(--primary);
            letter-spacing: -0.3px;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .logo a i {
            color: var(--accent);
            font-size: 26px;
        }
        .logo a:hover {
            color: var(--primary-dark);
        }
        .nav-main {
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .nav-main a {
            padding: 8px 18px;
            border-radius: var(--radius-sm);
            font-weight: 500;
            font-size: 15px;
            color: var(--text-secondary);
            transition: all var(--transition);
            position: relative;
        }
        .nav-main a:hover {
            color: var(--primary);
            background: var(--bg-alt);
        }
        .nav-main a.active {
            color: var(--primary);
            background: var(--bg-alt);
            font-weight: 600;
        }
        .nav-main a.active::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 50%;
            transform: translateX(-50%);
            width: 20px;
            height: 3px;
            background: var(--accent);
            border-radius: 4px;
        }
        .nav-cta {
            margin-left: 12px;
        }
        .nav-cta .btn-primary {
            padding: 10px 28px;
            font-size: 14px;
            font-weight: 600;
            border-radius: 50px;
            background: var(--accent);
            color: var(--primary-dark);
            border: none;
            cursor: pointer;
            transition: all var(--transition);
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }
        .nav-cta .btn-primary:hover {
            background: var(--accent-light);
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(245, 166, 35, 0.35);
        }
        .nav-toggle {
            display: none;
            background: none;
            border: none;
            font-size: 26px;
            color: var(--primary);
            cursor: pointer;
            padding: 4px 8px;
        }
        @media (max-width: 768px) {
            .nav-toggle {
                display: block;
            }
            .nav-main {
                position: fixed;
                top: 72px;
                left: 0;
                right: 0;
                background: var(--bg-card);
                flex-direction: column;
                padding: 20px 24px 28px;
                gap: 6px;
                border-bottom: 1px solid var(--border);
                box-shadow: var(--shadow-md);
                transform: translateY(-110%);
                opacity: 0;
                pointer-events: none;
                transition: all 0.4s ease;
            }
            .nav-main.open {
                transform: translateY(0);
                opacity: 1;
                pointer-events: auto;
            }
            .nav-main a {
                width: 100%;
                padding: 12px 16px;
                font-size: 16px;
            }
            .nav-main a.active::after {
                display: none;
            }
            .nav-cta {
                margin-left: 0;
                margin-top: 12px;
                width: 100%;
            }
            .nav-cta .btn-primary {
                width: 100%;
                justify-content: center;
                padding: 14px 28px;
            }
        }

        /* ===== Buttons ===== */
        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 14px 34px;
            border-radius: 50px;
            background: var(--accent);
            color: var(--primary-dark);
            font-weight: 600;
            font-size: 16px;
            border: none;
            cursor: pointer;
            transition: all var(--transition);
        }
        .btn-primary:hover {
            background: var(--accent-light);
            transform: translateY(-2px);
            box-shadow: 0 12px 32px rgba(245, 166, 35, 0.30);
            color: var(--primary-dark);
        }
        .btn-primary:active {
            transform: translateY(0);
        }
        .btn-secondary {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 14px 34px;
            border-radius: 50px;
            background: transparent;
            color: var(--text-white);
            font-weight: 600;
            font-size: 16px;
            border: 2px solid rgba(255, 255, 255, 0.35);
            cursor: pointer;
            transition: all var(--transition);
        }
        .btn-secondary:hover {
            background: rgba(255, 255, 255, 0.12);
            border-color: var(--text-white);
            color: var(--text-white);
            transform: translateY(-2px);
        }
        .btn-outline {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 10px 24px;
            border-radius: 50px;
            background: transparent;
            color: var(--primary);
            font-weight: 500;
            font-size: 14px;
            border: 1.5px solid var(--border);
            cursor: pointer;
            transition: all var(--transition);
        }
        .btn-outline:hover {
            border-color: var(--primary-light);
            background: var(--bg-alt);
            color: var(--primary-dark);
            transform: translateY(-1px);
        }

        /* ===== Hero ===== */
        .hero {
            position: relative;
            min-height: 620px;
            display: flex;
            align-items: center;
            background: var(--bg-dark);
            background-image: url('/assets/images/backpic/back-1.png');
            background-size: cover;
            background-position: center center;
            background-blend-mode: overlay;
            overflow: hidden;
        }
        .hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(15, 26, 74, 0.88) 0%, rgba(26, 42, 108, 0.70) 60%, rgba(15, 26, 74, 0.50) 100%);
            z-index: 1;
        }
        .hero .container {
            position: relative;
            z-index: 2;
            width: 100%;
        }
        .hero-content {
            max-width: 720px;
            padding: 60px 0;
        }
        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(245, 166, 35, 0.18);
            color: var(--accent-light);
            padding: 6px 18px;
            border-radius: 50px;
            font-size: 13px;
            font-weight: 500;
            letter-spacing: 0.3px;
            margin-bottom: 20px;
            border: 1px solid rgba(245, 166, 35, 0.20);
        }
        .hero-content h1 {
            font-size: clamp(36px, 5.5vw, 60px);
            font-weight: 800;
            line-height: 1.15;
            color: var(--text-white);
            margin-bottom: 20px;
            letter-spacing: -0.5px;
        }
        .hero-content h1 span {
            color: var(--accent);
        }
        .hero-content p {
            font-size: clamp(16px, 1.4vw, 20px);
            color: rgba(255, 255, 255, 0.80);
            line-height: 1.7;
            margin-bottom: 36px;
            max-width: 580px;
        }
        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            align-items: center;
        }
        .hero-stats {
            display: flex;
            gap: 40px;
            margin-top: 48px;
            padding-top: 32px;
            border-top: 1px solid rgba(255, 255, 255, 0.12);
        }
        .hero-stat h3 {
            font-size: 28px;
            font-weight: 700;
            color: var(--text-white);
            line-height: 1.2;
        }
        .hero-stat h3 small {
            font-size: 14px;
            font-weight: 400;
            color: var(--accent);
            margin-left: 4px;
        }
        .hero-stat p {
            font-size: 13px;
            color: rgba(255, 255, 255, 0.60);
            margin-bottom: 0;
        }
        @media (max-width: 768px) {
            .hero {
                min-height: 480px;
            }
            .hero-content {
                padding: 40px 0;
            }
            .hero-stats {
                gap: 24px;
                flex-wrap: wrap;
            }
            .hero-stat h3 {
                font-size: 22px;
            }
        }
        @media (max-width: 520px) {
            .hero-actions {
                flex-direction: column;
                width: 100%;
            }
            .hero-actions .btn-primary,
            .hero-actions .btn-secondary {
                width: 100%;
                justify-content: center;
            }
            .hero-stats {
                flex-direction: column;
                gap: 16px;
            }
        }

        /* ===== Section通用 ===== */
        section {
            padding: 80px 0;
        }
        .section-alt {
            background: var(--bg-alt);
        }
        .section-dark {
            background: var(--bg-dark);
            color: var(--text-white);
        }
        .section-title {
            text-align: center;
            margin-bottom: 52px;
        }
        .section-title h2 {
            font-size: clamp(28px, 3.2vw, 38px);
            font-weight: 700;
            color: var(--text-primary);
            letter-spacing: -0.3px;
            margin-bottom: 12px;
        }
        .section-title p {
            font-size: 17px;
            color: var(--text-secondary);
            max-width: 560px;
            margin: 0 auto;
        }
        .section-dark .section-title h2 {
            color: var(--text-white);
        }
        .section-dark .section-title p {
            color: rgba(255, 255, 255, 0.70);
        }
        .section-title .title-accent {
            display: inline-block;
            width: 48px;
            height: 4px;
            background: var(--accent);
            border-radius: 4px;
            margin-bottom: 16px;
        }

        /* ===== 卡片网格 ===== */
        .grid-3 {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: var(--gap);
        }
        .grid-4 {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: var(--gap);
        }
        .grid-2 {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: var(--gap);
        }
        @media (max-width: 1024px) {
            .grid-4 {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 768px) {
            .grid-3,
            .grid-4,
            .grid-2 {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            section {
                padding: 56px 0;
            }
        }

        /* ===== 卡片组件 ===== */
        .card {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            padding: 28px 24px;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border);
            transition: all var(--transition);
        }
        .card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-4px);
        }
        .card-icon {
            width: 52px;
            height: 52px;
            border-radius: 14px;
            background: var(--bg-alt);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 22px;
            color: var(--primary);
            margin-bottom: 16px;
            transition: all var(--transition);
        }
        .card:hover .card-icon {
            background: var(--primary);
            color: var(--text-white);
        }
        .card h3 {
            font-size: 18px;
            font-weight: 600;
            margin-bottom: 8px;
            color: var(--text-primary);
        }
        .card p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.6;
        }
        .card .card-tag {
            display: inline-block;
            padding: 2px 12px;
            border-radius: 50px;
            background: var(--bg-alt);
            font-size: 12px;
            color: var(--text-light);
            margin-bottom: 12px;
        }

        /* ===== Cover卡片 ===== */
        .cover-card {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border);
            transition: all var(--transition);
        }
        .cover-card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-4px);
        }
        .cover-card .cover-img {
            width: 100%;
            aspect-ratio: 16 / 10;
            object-fit: cover;
            display: block;
            background: var(--bg-alt);
        }
        .cover-card .cover-body {
            padding: 20px 22px 24px;
        }
        .cover-card .cover-body h3 {
            font-size: 17px;
            font-weight: 600;
            margin-bottom: 6px;
        }
        .cover-card .cover-body p {
            font-size: 13px;
            color: var(--text-secondary);
            line-height: 1.6;
        }
        .cover-card .cover-body .cover-meta {
            display: flex;
            align-items: center;
            gap: 14px;
            margin-top: 12px;
            font-size: 12px;
            color: var(--text-light);
        }

        /* ===== 特色/亮点块 ===== */
        .feature-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: var(--gap);
        }
        @media (max-width: 768px) {
            .feature-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }
        }
        .feature-item {
            text-align: center;
            padding: 32px 20px;
            background: var(--bg-card);
            border-radius: var(--radius-md);
            border: 1px solid var(--border);
            transition: all var(--transition);
        }
        .feature-item:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-4px);
        }
        .feature-item .fi-icon {
            font-size: 40px;
            color: var(--accent);
            margin-bottom: 16px;
        }
        .feature-item h3 {
            font-size: 18px;
            font-weight: 600;
            margin-bottom: 8px;
        }
        .feature-item p {
            font-size: 14px;
            color: var(--text-secondary);
            max-width: 260px;
            margin: 0 auto;
        }

        /* ===== 流程步骤 ===== */
        .steps {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            counter-reset: step;
        }
        .step-item {
            text-align: center;
            padding: 28px 16px;
            position: relative;
        }
        .step-item::before {
            counter-increment: step;
            content: counter(step);
            display: flex;
            align-items: center;
            justify-content: center;
            width: 44px;
            height: 44px;
            border-radius: 50%;
            background: var(--accent);
            color: var(--primary-dark);
            font-weight: 700;
            font-size: 18px;
            margin: 0 auto 16px;
        }
        .step-item h4 {
            font-size: 16px;
            font-weight: 600;
            margin-bottom: 6px;
            color: var(--text-primary);
        }
        .step-item p {
            font-size: 13px;
            color: var(--text-secondary);
            line-height: 1.5;
        }
        .step-connector {
            display: none;
        }
        @media (min-width: 769px) {
            .step-item {
                position: relative;
            }
            .step-item:not(:last-child)::after {
                content: '→';
                position: absolute;
                right: -18px;
                top: 36px;
                font-size: 24px;
                color: var(--accent);
                font-weight: 300;
                opacity: 0.5;
            }
        }
        @media (max-width: 768px) {
            .steps {
                grid-template-columns: 1fr 1fr;
                gap: 16px;
            }
            .step-item:not(:last-child)::after {
                display: none;
            }
        }
        @media (max-width: 520px) {
            .steps {
                grid-template-columns: 1fr;
            }
        }

        /* ===== 最新资讯列表 ===== */
        .post-list {
            display: grid;
            grid-template-columns: 1fr;
            gap: 16px;
        }
        .post-item {
            display: flex;
            align-items: flex-start;
            gap: 20px;
            background: var(--bg-card);
            padding: 20px 24px;
            border-radius: var(--radius-sm);
            border: 1px solid var(--border);
            transition: all var(--transition);
        }
        .post-item:hover {
            box-shadow: var(--shadow-sm);
            border-color: var(--primary-light);
        }
        .post-item .post-icon {
            flex-shrink: 0;
            width: 40px;
            height: 40px;
            border-radius: 10px;
            background: var(--bg-alt);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--primary);
            font-size: 18px;
        }
        .post-item .post-info {
            flex: 1;
            min-width: 0;
        }
        .post-item .post-info h4 {
            font-size: 16px;
            font-weight: 600;
            margin-bottom: 4px;
        }
        .post-item .post-info h4 a {
            color: var(--text-primary);
        }
        .post-item .post-info h4 a:hover {
            color: var(--primary-light);
        }
        .post-item .post-info p {
            font-size: 13px;
            color: var(--text-secondary);
            line-height: 1.5;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .post-item .post-meta {
            display: flex;
            align-items: center;
            gap: 16px;
            margin-top: 6px;
            font-size: 12px;
            color: var(--text-light);
        }
        .post-item .post-meta .tag {
            background: var(--bg-alt);
            padding: 1px 10px;
            border-radius: 50px;
            font-size: 11px;
            color: var(--text-light);
        }
        @media (max-width: 520px) {
            .post-item {
                flex-direction: column;
                gap: 12px;
                padding: 16px 18px;
            }
            .post-item .post-icon {
                width: 32px;
                height: 32px;
                font-size: 14px;
            }
        }
        .empty-msg {
            text-align: center;
            padding: 40px 20px;
            color: var(--text-light);
            font-size: 15px;
        }

        /* ===== 数据统计 ===== */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: var(--gap);
        }
        .stat-item {
            text-align: center;
            padding: 28px 16px;
        }
        .stat-item .stat-number {
            font-size: 42px;
            font-weight: 800;
            color: var(--accent);
            line-height: 1.1;
            letter-spacing: -1px;
        }
        .stat-item .stat-label {
            font-size: 15px;
            color: rgba(255, 255, 255, 0.75);
            margin-top: 8px;
        }
        @media (max-width: 768px) {
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 20px;
            }
            .stat-item .stat-number {
                font-size: 32px;
            }
        }
        @media (max-width: 520px) {
            .stats-grid {
                grid-template-columns: 1fr 1fr;
            }
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 780px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .faq-item {
            background: var(--bg-card);
            border-radius: var(--radius-sm);
            border: 1px solid var(--border);
            overflow: hidden;
            transition: all var(--transition);
        }
        .faq-item:hover {
            border-color: var(--primary-light);
        }
        .faq-item summary {
            padding: 18px 24px;
            font-weight: 600;
            font-size: 16px;
            color: var(--text-primary);
            cursor: pointer;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            list-style: none;
            transition: color 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: 13px;
            color: var(--text-light);
            transition: transform 0.3s ease;
            flex-shrink: 0;
        }
        .faq-item[open] summary::after {
            transform: rotate(180deg);
        }
        .faq-item[open] summary {
            color: var(--primary);
        }
        .faq-item .faq-answer {
            padding: 0 24px 18px;
            font-size: 15px;
            color: var(--text-secondary);
            line-height: 1.7;
        }
        @media (max-width: 520px) {
            .faq-item summary {
                padding: 14px 16px;
                font-size: 15px;
            }
            .faq-item .faq-answer {
                padding: 0 16px 14px;
                font-size: 14px;
            }
        }

        /* ===== CTA ===== */
        .cta-block {
            background: var(--bg-dark);
            background-image: url('/assets/images/backpic/back-2.png');
            background-size: cover;
            background-position: center;
            background-blend-mode: overlay;
            position: relative;
            padding: 80px 0;
        }
        .cta-block::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(15, 26, 74, 0.92) 0%, rgba(26, 42, 108, 0.78) 100%);
            z-index: 1;
        }
        .cta-block .container {
            position: relative;
            z-index: 2;
            text-align: center;
        }
        .cta-block h2 {
            font-size: clamp(28px, 3.2vw, 40px);
            font-weight: 700;
            color: var(--text-white);
            margin-bottom: 14px;
        }
        .cta-block p {
            font-size: 17px;
            color: rgba(255, 255, 255, 0.75);
            max-width: 560px;
            margin: 0 auto 32px;
        }
        .cta-block .cta-actions {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 16px;
        }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--bg-dark);
            color: rgba(255, 255, 255, 0.70);
            padding: 48px 0 32px;
            border-top: 1px solid rgba(255, 255, 255, 0.06);
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 36px;
            margin-bottom: 36px;
        }
        .footer-brand .logo a {
            color: var(--text-white);
            font-size: 20px;
        }
        .footer-brand p {
            font-size: 14px;
            margin-top: 12px;
            max-width: 320px;
            line-height: 1.7;
        }
        .footer-col h4 {
            font-size: 15px;
            font-weight: 600;
            color: var(--text-white);
            margin-bottom: 16px;
        }
        .footer-col ul li {
            margin-bottom: 8px;
        }
        .footer-col ul li a {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.60);
            transition: all var(--transition);
        }
        .footer-col ul li a:hover {
            color: var(--accent);
            padding-left: 4px;
        }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            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, 0.45);
        }
        .footer-bottom a {
            color: rgba(255, 255, 255, 0.55);
        }
        .footer-bottom a:hover {
            color: var(--accent);
        }
        @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;
            }
        }

        /* ===== 通用徽章/标签 ===== */
        .badge {
            display: inline-block;
            padding: 2px 14px;
            border-radius: 50px;
            font-size: 12px;
            font-weight: 500;
            background: var(--bg-alt);
            color: var(--text-secondary);
        }
        .badge-accent {
            background: rgba(245, 166, 35, 0.15);
            color: var(--accent-dark);
        }

        /* ===== 图片装饰 ===== */
        .img-round {
            border-radius: var(--radius-md);
        }

        /* ===== 分隔线 ===== */
        .divider {
            width: 100%;
            height: 1px;
            background: var(--border);
            margin: 0;
        }

        /* ===== 响应式微调 ===== */
        @media (max-width: 1024px) {
            .container {
                padding: 0 20px;
            }
        }
        @media (max-width: 520px) {
            .container {
                padding: 0 16px;
            }
            .card {
                padding: 20px 16px;
            }
            .cover-card .cover-body {
                padding: 16px 16px 20px;
            }
        }

        /* ===== focus / active 辅助 ===== */
        a:focus-visible,
        button:focus-visible,
        summary:focus-visible {
            outline: 3px solid var(--accent);
            outline-offset: 2px;
            border-radius: 4px;
        }

        /* ===== 图片自适应占位 ===== */
        .cover-img-placeholder {
            background: var(--bg-alt);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--text-light);
            font-size: 14px;
            aspect-ratio: 16 / 10;
            border-radius: var(--radius-sm);
        }

/* roulang page: category1 */
/* ===== 设计变量 ===== */
        :root {
            --primary: #6366f1;
            --primary-dark: #4f46e5;
            --primary-light: #a5b4fc;
            --primary-bg: #eef2ff;
            --secondary: #06b6d4;
            --secondary-dark: #0891b2;
            --accent: #f59e0b;
            --accent-dark: #d97706;
            --bg-body: #f8fafc;
            --bg-white: #ffffff;
            --bg-dark: #0f172a;
            --bg-card: #ffffff;
            --text-primary: #0f172a;
            --text-secondary: #475569;
            --text-muted: #94a3b8;
            --text-white: #f1f5f9;
            --border-color: #e2e8f0;
            --border-light: #f1f5f9;
            --radius-sm: 8px;
            --radius-md: 12px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06);
            --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.08);
            --shadow-lg: 0 12px 40px rgba(0, 0, 0, 0.12);
            --shadow-xl: 0 24px 60px rgba(0, 0, 0, 0.15);
            --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, 'Noto Sans SC', sans-serif;
            --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
            --max-width: 1200px;
            --header-height: 76px;
            --nav-gap: 32px;
        }

        /* ===== 基础 Reset ===== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

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

        body {
            font-family: var(--font-family);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text-primary);
            background: var(--bg-body);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: var(--radius-sm);
        }

        a {
            color: var(--primary);
            text-decoration: none;
            transition: color var(--transition);
        }
        a:hover {
            color: var(--primary-dark);
        }
        a:focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 4px;
            border-radius: 4px;
        }

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

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

        .section-padding {
            padding: 80px 0;
        }

        .section-title {
            font-size: 2.2rem;
            font-weight: 800;
            margin-bottom: 16px;
            letter-spacing: -0.02em;
            text-align: center;
        }

        .section-subtitle {
            font-size: 1.1rem;
            color: var(--text-secondary);
            max-width: 680px;
            margin: 0 auto 48px auto;
            text-align: center;
            line-height: 1.7;
        }

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

        .badge {
            display: inline-block;
            padding: 6px 16px;
            border-radius: 50px;
            font-size: 0.85rem;
            font-weight: 600;
            background: var(--primary-bg);
            color: var(--primary);
            margin-bottom: 16px;
        }

        /* ===== Header / Nav ===== */
        .site-header {
            background: rgba(255, 255, 255, 0.96);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--border-color);
            position: sticky;
            top: 0;
            z-index: 1000;
            height: var(--header-height);
            display: flex;
            align-items: center;
            box-shadow: 0 1px 4px rgba(0, 0, 0, 0.04);
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            width: 100%;
        }

        .logo a {
            font-size: 1.5rem;
            font-weight: 800;
            color: var(--text-primary);
            display: flex;
            align-items: center;
            gap: 10px;
            letter-spacing: -0.03em;
            transition: opacity var(--transition);
        }
        .logo a:hover {
            opacity: 0.85;
            color: var(--text-primary);
        }
        .logo a i {
            color: var(--primary);
            font-size: 1.6rem;
        }

        .nav-main {
            display: flex;
            align-items: center;
            gap: var(--nav-gap);
        }

        .nav-main a {
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--text-secondary);
            padding: 6px 0;
            position: relative;
            transition: color var(--transition);
        }
        .nav-main a::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 0;
            width: 0;
            height: 2.5px;
            background: var(--primary);
            border-radius: 4px;
            transition: width var(--transition);
        }
        .nav-main a:hover {
            color: var(--primary);
        }
        .nav-main a:hover::after {
            width: 100%;
        }
        .nav-main a.active {
            color: var(--primary);
            font-weight: 600;
        }
        .nav-main a.active::after {
            width: 100%;
        }

        .nav-cta .btn-primary {
            padding: 10px 28px;
            border-radius: 50px;
            background: var(--primary);
            color: #fff;
            font-weight: 600;
            font-size: 0.95rem;
            border: none;
            display: flex;
            align-items: center;
            gap: 8px;
            transition: background var(--transition), transform var(--transition), box-shadow var(--transition);
            box-shadow: 0 4px 14px rgba(99, 102, 241, 0.35);
        }
        .nav-cta .btn-primary:hover {
            background: var(--primary-dark);
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(99, 102, 241, 0.45);
        }
        .nav-cta .btn-primary:active {
            transform: translateY(0);
            box-shadow: 0 2px 8px rgba(99, 102, 241, 0.3);
        }
        .nav-cta .btn-primary i {
            font-size: 1rem;
        }

        .nav-toggle {
            display: none;
            font-size: 1.6rem;
            color: var(--text-primary);
            padding: 8px;
            border-radius: var(--radius-sm);
            background: var(--bg-body);
            transition: background var(--transition);
        }
        .nav-toggle:hover {
            background: var(--border-color);
        }

        /* ===== 页脚 ===== */
        .site-footer {
            background: var(--bg-dark);
            color: var(--text-white);
            padding: 60px 0 0 0;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.8fr 1fr 1fr 1fr;
            gap: 48px;
            padding-bottom: 40px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        }

        .footer-brand .logo a {
            color: var(--text-white);
            font-size: 1.4rem;
        }
        .footer-brand .logo a i {
            color: var(--primary-light);
        }
        .footer-brand .logo a:hover {
            opacity: 0.9;
        }

        .footer-brand p {
            margin-top: 16px;
            font-size: 0.95rem;
            line-height: 1.8;
            color: rgba(255, 255, 255, 0.65);
            max-width: 360px;
        }

        .footer-col h4 {
            color: var(--text-white);
            font-size: 1.05rem;
            font-weight: 700;
            margin-bottom: 20px;
            letter-spacing: 0.02em;
        }

        .footer-col ul li {
            margin-bottom: 12px;
        }
        .footer-col ul li a {
            color: rgba(255, 255, 255, 0.6);
            font-size: 0.92rem;
            transition: color var(--transition), padding-left var(--transition);
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }
        .footer-col ul li a:hover {
            color: var(--primary-light);
            padding-left: 4px;
        }
        .footer-col ul li a i {
            font-size: 0.85rem;
        }

        .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, 0.4);
        }
        .footer-bottom a {
            color: rgba(255, 255, 255, 0.5);
        }
        .footer-bottom a:hover {
            color: var(--primary-light);
        }

        /* ===== 通用按钮 ===== */
        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 14px 36px;
            border-radius: 50px;
            background: var(--primary);
            color: #fff;
            font-weight: 600;
            font-size: 1rem;
            border: none;
            transition: background var(--transition), transform var(--transition), box-shadow var(--transition);
            box-shadow: 0 4px 14px rgba(99, 102, 241, 0.35);
        }
        .btn-primary:hover {
            background: var(--primary-dark);
            transform: translateY(-2px);
            box-shadow: 0 10px 30px rgba(99, 102, 241, 0.4);
        }
        .btn-primary:active {
            transform: translateY(0);
            box-shadow: 0 2px 8px rgba(99, 102, 241, 0.3);
        }

        .btn-secondary {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 14px 36px;
            border-radius: 50px;
            background: transparent;
            color: var(--primary);
            font-weight: 600;
            font-size: 1rem;
            border: 2px solid var(--primary);
            transition: background var(--transition), color var(--transition), transform var(--transition);
        }
        .btn-secondary:hover {
            background: var(--primary);
            color: #fff;
            transform: translateY(-2px);
        }
        .btn-secondary:active {
            transform: translateY(0);
        }

        /* ===== Banner 首屏 ===== */
        .page-banner {
            position: relative;
            min-height: 360px;
            display: flex;
            align-items: center;
            justify-content: center;
            text-align: center;
            padding: 80px 24px 60px;
            background: linear-gradient(135deg, #0f172a 0%, #1e293b 60%, #0f172a 100%);
            overflow: hidden;
        }
        .page-banner::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
            opacity: 0.15;
            pointer-events: none;
        }
        .page-banner::after {
            content: '';
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at 30% 50%, rgba(99, 102, 241, 0.15) 0%, transparent 70%);
            pointer-events: none;
        }
        .page-banner .container {
            position: relative;
            z-index: 2;
        }
        .page-banner .badge {
            background: rgba(99, 102, 241, 0.2);
            color: var(--primary-light);
            border: 1px solid rgba(99, 102, 241, 0.3);
        }
        .page-banner h1 {
            font-size: 3rem;
            font-weight: 800;
            color: #fff;
            margin-bottom: 16px;
            letter-spacing: -0.02em;
            line-height: 1.2;
        }
        .page-banner p {
            font-size: 1.15rem;
            color: rgba(255, 255, 255, 0.7);
            max-width: 640px;
            margin: 0 auto 32px auto;
            line-height: 1.7;
        }
        .page-banner .btn-primary {
            background: var(--primary);
            box-shadow: 0 4px 20px rgba(99, 102, 241, 0.5);
        }
        .page-banner .btn-primary:hover {
            background: var(--primary-dark);
            box-shadow: 0 8px 32px rgba(99, 102, 241, 0.6);
        }

        /* ===== 下载流程 ===== */
        .steps-section {
            background: var(--bg-white);
        }
        .steps-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 28px;
            margin-top: 16px;
        }
        .step-card {
            background: var(--bg-body);
            border-radius: var(--radius-md);
            padding: 32px 24px;
            text-align: center;
            border: 1px solid var(--border-color);
            transition: transform var(--transition), box-shadow var(--transition);
            position: relative;
        }
        .step-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-md);
        }
        .step-number {
            width: 52px;
            height: 52px;
            border-radius: 50%;
            background: var(--primary);
            color: #fff;
            font-size: 1.4rem;
            font-weight: 800;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 18px auto;
            box-shadow: 0 4px 12px rgba(99, 102, 241, 0.3);
        }
        .step-card h3 {
            font-size: 1.15rem;
            margin-bottom: 10px;
            font-weight: 700;
        }
        .step-card p {
            font-size: 0.92rem;
            color: var(--text-secondary);
            line-height: 1.65;
        }

        /* ===== 版本选择 ===== */
        .version-section {
            background: var(--bg-body);
        }
        .version-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }
        .version-card {
            background: var(--bg-white);
            border-radius: var(--radius-md);
            padding: 32px 28px;
            border: 1px solid var(--border-color);
            transition: transform var(--transition), box-shadow var(--transition);
            text-align: center;
        }
        .version-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-lg);
        }
        .version-icon {
            font-size: 2.8rem;
            color: var(--primary);
            margin-bottom: 18px;
        }
        .version-card h3 {
            font-size: 1.25rem;
            margin-bottom: 8px;
        }
        .version-card .version-tag {
            display: inline-block;
            padding: 4px 14px;
            border-radius: 50px;
            font-size: 0.8rem;
            font-weight: 600;
            background: var(--primary-bg);
            color: var(--primary);
            margin-bottom: 14px;
        }
        .version-card p {
            font-size: 0.92rem;
            color: var(--text-secondary);
            line-height: 1.7;
            margin-bottom: 18px;
        }
        .version-card .btn-secondary {
            padding: 10px 28px;
            font-size: 0.9rem;
        }

        /* ===== 注意事项 ===== */
        .notice-section {
            background: var(--bg-white);
        }
        .notice-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 28px;
        }
        .notice-item {
            display: flex;
            gap: 20px;
            padding: 28px 24px;
            background: var(--bg-body);
            border-radius: var(--radius-md);
            border-left: 4px solid var(--primary);
            transition: transform var(--transition), box-shadow var(--transition);
        }
        .notice-item:hover {
            transform: translateY(-3px);
            box-shadow: var(--shadow-sm);
        }
        .notice-icon {
            font-size: 1.8rem;
            color: var(--primary);
            flex-shrink: 0;
            margin-top: 4px;
        }
        .notice-item h4 {
            font-size: 1.05rem;
            margin-bottom: 6px;
        }
        .notice-item p {
            font-size: 0.92rem;
            color: var(--text-secondary);
            line-height: 1.65;
        }

        /* ===== FAQ ===== */
        .faq-section {
            background: var(--bg-body);
        }
        .faq-list {
            max-width: 820px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .faq-item {
            background: var(--bg-white);
            border-radius: var(--radius-md);
            border: 1px solid var(--border-color);
            overflow: hidden;
            transition: box-shadow var(--transition);
        }
        .faq-item:hover {
            box-shadow: var(--shadow-sm);
        }
        .faq-question {
            width: 100%;
            padding: 20px 28px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            font-size: 1.05rem;
            font-weight: 600;
            color: var(--text-primary);
            text-align: left;
            background: none;
            border: none;
            transition: color var(--transition), background var(--transition);
            gap: 16px;
        }
        .faq-question:hover {
            background: var(--primary-bg);
        }
        .faq-question i {
            font-size: 1.2rem;
            color: var(--primary);
            transition: transform var(--transition);
            flex-shrink: 0;
        }
        .faq-question.open i {
            transform: rotate(180deg);
        }
        .faq-answer {
            padding: 0 28px 20px 28px;
            font-size: 0.95rem;
            color: var(--text-secondary);
            line-height: 1.75;
            display: none;
        }
        .faq-answer.open {
            display: block;
        }

        /* ===== CTA ===== */
        .cta-section {
            background: linear-gradient(135deg, #0f172a 0%, #1e293b 100%);
            padding: 80px 0;
            text-align: center;
            position: relative;
            overflow: hidden;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
            opacity: 0.06;
            pointer-events: none;
        }
        .cta-section .container {
            position: relative;
            z-index: 2;
        }
        .cta-section h2 {
            font-size: 2.4rem;
            font-weight: 800;
            color: #fff;
            margin-bottom: 16px;
        }
        .cta-section p {
            font-size: 1.1rem;
            color: rgba(255, 255, 255, 0.7);
            max-width: 600px;
            margin: 0 auto 36px auto;
        }
        .cta-section .btn-primary {
            background: var(--primary);
            box-shadow: 0 4px 24px rgba(99, 102, 241, 0.5);
            font-size: 1.1rem;
            padding: 16px 44px;
        }
        .cta-section .btn-primary:hover {
            background: var(--primary-dark);
            box-shadow: 0 8px 36px rgba(99, 102, 241, 0.6);
        }

        /* ===== 响应式 ===== */
        @media (max-width: 1024px) {
            .steps-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .version-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .footer-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 36px;
            }
        }

        @media (max-width: 768px) {
            .section-padding {
                padding: 56px 0;
            }
            .section-title {
                font-size: 1.7rem;
            }
            .section-subtitle {
                font-size: 1rem;
                margin-bottom: 32px;
            }

            .page-banner {
                min-height: 280px;
                padding: 60px 20px 48px;
            }
            .page-banner h1 {
                font-size: 2rem;
            }
            .page-banner p {
                font-size: 1rem;
            }

            .nav-main {
                position: fixed;
                top: var(--header-height);
                left: 0;
                right: 0;
                background: rgba(255, 255, 255, 0.98);
                backdrop-filter: blur(12px);
                -webkit-backdrop-filter: blur(12px);
                flex-direction: column;
                padding: 24px 28px;
                gap: 18px;
                border-bottom: 1px solid var(--border-color);
                box-shadow: var(--shadow-lg);
                transform: translateY(-120%);
                opacity: 0;
                transition: transform 0.35s ease, opacity 0.35s ease;
                pointer-events: none;
                align-items: stretch;
                z-index: 999;
            }
            .nav-main.open {
                transform: translateY(0);
                opacity: 1;
                pointer-events: auto;
            }
            .nav-main a {
                font-size: 1.1rem;
                padding: 10px 0;
            }
            .nav-main a::after {
                display: none;
            }
            .nav-main a.active {
                background: var(--primary-bg);
                padding: 10px 16px;
                border-radius: var(--radius-sm);
            }
            .nav-cta {
                margin-top: 8px;
            }
            .nav-cta .btn-primary {
                width: 100%;
                justify-content: center;
            }

            .nav-toggle {
                display: block;
            }

            .steps-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .version-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .notice-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }

            .footer-grid {
                grid-template-columns: 1fr;
                gap: 32px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }

            .cta-section h2 {
                font-size: 1.8rem;
            }
            .cta-section p {
                font-size: 1rem;
            }
            .cta-section .btn-primary {
                padding: 14px 32px;
                font-size: 1rem;
            }

            .faq-question {
                padding: 16px 20px;
                font-size: 0.98rem;
            }
            .faq-answer {
                padding: 0 20px 16px 20px;
            }
        }

        @media (max-width: 520px) {
            .container {
                padding-left: 16px;
                padding-right: 16px;
            }
            .page-banner h1 {
                font-size: 1.6rem;
            }
            .section-title {
                font-size: 1.4rem;
            }
            .step-card {
                padding: 24px 18px;
            }
            .version-card {
                padding: 24px 18px;
            }
            .notice-item {
                flex-direction: column;
                gap: 12px;
                padding: 20px 18px;
            }
            .footer-grid {
                gap: 24px;
            }
        }

/* roulang page: article */
:root {
    --primary: #2563eb;
    --primary-dark: #1d4ed8;
    --primary-light: #dbeafe;
    --accent: #f59e0b;
    --accent-dark: #d97706;
    --bg: #f8fafc;
    --surface: #ffffff;
    --text: #0f172a;
    --text-light: #475569;
    --text-muted: #94a3b8;
    --border: #e2e8f0;
    --radius: 12px;
    --radius-sm: 8px;
    --radius-lg: 20px;
    --shadow: 0 4px 24px rgba(0,0,0,0.06);
    --shadow-lg: 0 12px 48px rgba(0,0,0,0.1);
    --transition: 0.3s cubic-bezier(0.4,0,0.2,1);
    --font: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --max-w: 1200px;
    --header-h: 72px;
}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:var(--font);background:var(--bg);color:var(--text);line-height:1.6;-webkit-font-smoothing:antialiased}
a{color:var(--primary);text-decoration:none;transition:var(--transition)}
a:hover{color:var(--primary-dark)}
img{max-width:100%;height:auto;display:block}
button{cursor:pointer;font-family:var(--font);border:none;background:none}
input,textarea{font-family:var(--font)}
.container{width:100%;max-width:var(--max-w);margin:0 auto;padding:0 24px}
@media(max-width:768px){.container{padding:0 16px}}

/* Header */
.site-header{position:fixed;top:0;left:0;right:0;z-index:1000;background:rgba(255,255,255,0.92);backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);border-bottom:1px solid var(--border);height:var(--header-h)}
.header-inner{display:flex;align-items:center;justify-content:space-between;height:100%}
.logo a{font-size:1.35rem;font-weight:700;color:var(--text);display:flex;align-items:center;gap:10px;letter-spacing:-0.3px}
.logo a i{color:var(--primary);font-size:1.5rem}
.logo a:hover{color:var(--primary)}
.nav-main{display:flex;align-items:center;gap:8px}
.nav-main a{padding:8px 18px;border-radius:var(--radius-sm);font-size:0.95rem;font-weight:500;color:var(--text-light);transition:var(--transition);position:relative}
.nav-main a:hover{color:var(--primary);background:var(--primary-light)}
.nav-main a.active{color:var(--primary);background:var(--primary-light);font-weight:600}
.nav-cta{margin-left:12px}
.btn-primary{display:inline-flex;align-items:center;gap:8px;background:linear-gradient(135deg,var(--primary),var(--primary-dark));color:#fff;padding:10px 28px;border-radius:50px;font-size:0.95rem;font-weight:600;transition:var(--transition);box-shadow:0 4px 16px rgba(37,99,235,0.3)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 8px 28px rgba(37,99,235,0.4);color:#fff}
.btn-primary:active{transform:translateY(0)}
.nav-toggle{display:none;font-size:1.5rem;color:var(--text);padding:8px;border-radius:var(--radius-sm)}
@media(max-width:1024px){
    .nav-main{position:fixed;top:var(--header-h);left:0;right:0;background:rgba(255,255,255,0.98);backdrop-filter:blur(16px);flex-direction:column;padding:20px 24px;gap:12px;border-bottom:1px solid var(--border);transform:translateY(-120%);opacity:0;transition:var(--transition);pointer-events:none;box-shadow:var(--shadow-lg)}
    .nav-main.open{transform:translateY(0);opacity:1;pointer-events:auto}
    .nav-main a{width:100%;padding:12px 16px;font-size:1.05rem}
    .nav-cta{margin-left:0;width:100%}
    .nav-cta .btn-primary{width:100%;justify-content:center}
    .nav-toggle{display:block}
}
@media(max-width:520px){
    .logo a{font-size:1.1rem}
    .logo a i{font-size:1.2rem}
    .btn-primary{padding:8px 20px;font-size:0.9rem}
}

/* Page Banner */
.page-banner{background:linear-gradient(135deg,#1e293b 0%,#0f172a 100%);padding:120px 0 60px;position:relative;overflow:hidden;margin-top:var(--header-h)}
.page-banner::before{content:'';position:absolute;inset:0;background:url('/assets/images/backpic/back-1.png') center/cover no-repeat;opacity:0.15;mix-blend-mode:overlay}
.page-banner .container{position:relative;z-index:1}
.breadcrumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:0.85rem;color:var(--text-muted);margin-bottom:20px}
.breadcrumb a{color:rgba(255,255,255,0.7);transition:var(--transition)}
.breadcrumb a:hover{color:#fff}
.breadcrumb span{color:rgba(255,255,255,0.5)}
.breadcrumb i{font-size:0.7rem;color:rgba(255,255,255,0.3)}
.page-banner h1{font-size:2.4rem;font-weight:800;color:#fff;line-height:1.25;max-width:800px;letter-spacing:-0.5px}
.page-meta{display:flex;flex-wrap:wrap;gap:16px 28px;margin-top:20px;color:rgba(255,255,255,0.7);font-size:0.9rem}
.page-meta i{margin-right:6px;color:var(--accent)}
.page-meta .tag{display:inline-block;padding:4px 14px;border-radius:50px;background:rgba(255,255,255,0.12);color:rgba(255,255,255,0.9);font-size:0.8rem;font-weight:500}
@media(max-width:768px){
    .page-banner{padding:100px 0 40px}
    .page-banner h1{font-size:1.6rem}
    .page-meta{gap:12px 20px;font-size:0.82rem}
}
@media(max-width:520px){
    .page-banner h1{font-size:1.3rem}
}

/* Article Content */
.article-section{padding:60px 0}
.article-layout{display:grid;grid-template-columns:1fr 320px;gap:48px}
.article-main{background:var(--surface);border-radius:var(--radius);box-shadow:var(--shadow);overflow:hidden}
.article-cover{width:100%;height:auto;aspect-ratio:16/9;object-fit:cover;border-bottom:1px solid var(--border)}
.article-body{padding:40px 48px}
.article-body .lead{font-size:1.15rem;color:var(--text-light);line-height:1.8;margin-bottom:28px;padding-bottom:28px;border-bottom:1px solid var(--border)}
.article-body .content{font-size:1.05rem;line-height:1.9;color:var(--text)}
.article-body .content p{margin-bottom:20px}
.article-body .content h2,.article-body .content h3{margin-top:36px;margin-bottom:16px;font-weight:700;color:var(--text)}
.article-body .content h2{font-size:1.6rem}
.article-body .content h3{font-size:1.25rem}
.article-body .content ul,.article-body .content ol{padding-left:24px;margin-bottom:20px}
.article-body .content li{margin-bottom:8px}
.article-body .content a{color:var(--primary);text-decoration:underline}
.article-body .content blockquote{border-left:4px solid var(--primary);background:var(--primary-light);padding:16px 24px;margin:24px 0;border-radius:0 var(--radius-sm) var(--radius-sm) 0;color:var(--text-light);font-style:italic}
.article-footer-bar{display:flex;flex-wrap:wrap;justify-content:space-between;align-items:center;padding:24px 48px;border-top:1px solid var(--border);gap:16px}
.article-tags{display:flex;flex-wrap:wrap;gap:8px}
.article-tags .tag{display:inline-block;padding:4px 16px;border-radius:50px;background:var(--primary-light);color:var(--primary);font-size:0.82rem;font-weight:500;transition:var(--transition)}
.article-tags .tag:hover{background:var(--primary);color:#fff}
.article-share{display:flex;align-items:center;gap:12px;font-size:0.9rem;color:var(--text-light)}
.article-share a{display:inline-flex;align-items:center;justify-content:center;width:36px;height:36px;border-radius:50%;background:var(--bg);color:var(--text-light);transition:var(--transition)}
.article-share a:hover{background:var(--primary);color:#fff}
@media(max-width:1024px){
    .article-layout{grid-template-columns:1fr;gap:32px}
}
@media(max-width:768px){
    .article-section{padding:40px 0}
    .article-body{padding:24px 20px}
    .article-footer-bar{padding:20px;flex-direction:column;align-items:flex-start}
    .article-body .lead{font-size:1.05rem}
    .article-body .content{font-size:0.98rem}
}
@media(max-width:520px){
    .article-body{padding:16px}
    .article-body .content h2{font-size:1.3rem}
    .article-body .content h3{font-size:1.1rem}
}

/* Sidebar */
.article-sidebar{display:flex;flex-direction:column;gap:32px}
.sidebar-card{background:var(--surface);border-radius:var(--radius);box-shadow:var(--shadow);padding:28px;border:1px solid var(--border)}
.sidebar-card h3{font-size:1.1rem;font-weight:700;margin-bottom:18px;padding-bottom:12px;border-bottom:2px solid var(--primary-light);color:var(--text)}
.sidebar-list{list-style:none;display:flex;flex-direction:column;gap:12px}
.sidebar-list li{display:flex;align-items:flex-start;gap:12px}
.sidebar-list li i{color:var(--primary);margin-top:4px;font-size:0.85rem;flex-shrink:0}
.sidebar-list li a{color:var(--text-light);font-size:0.92rem;transition:var(--transition);line-height:1.5}
.sidebar-list li a:hover{color:var(--primary)}
.sidebar-cta{background:linear-gradient(135deg,var(--primary),var(--primary-dark));color:#fff;border:none;padding:32px 28px;text-align:center}
.sidebar-cta h3{color:#fff;border-bottom-color:rgba(255,255,255,0.2)}
.sidebar-cta p{color:rgba(255,255,255,0.85);font-size:0.92rem;margin-bottom:20px;line-height:1.7}
.sidebar-cta .btn-primary{background:#fff;color:var(--primary);box-shadow:0 4px 16px rgba(0,0,0,0.15)}
.sidebar-cta .btn-primary:hover{background:var(--accent);color:#fff;box-shadow:0 8px 28px rgba(0,0,0,0.2)}
@media(max-width:1024px){
    .article-sidebar{display:grid;grid-template-columns:1fr 1fr;gap:24px}
}
@media(max-width:768px){
    .article-sidebar{grid-template-columns:1fr}
}

/* Related */
.related-section{padding:60px 0;background:var(--bg);border-top:1px solid var(--border)}
.related-section h2{font-size:1.8rem;font-weight:700;text-align:center;margin-bottom:12px;letter-spacing:-0.3px}
.related-section .subtitle{text-align:center;color:var(--text-light);margin-bottom:40px;font-size:1rem}
.related-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:28px}
.related-card{background:var(--surface);border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow);transition:var(--transition);border:1px solid var(--border);display:flex;flex-direction:column}
.related-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-lg)}
.related-card img{width:100%;aspect-ratio:16/10;object-fit:cover;border-bottom:1px solid var(--border)}
.related-card .info{padding:20px 24px 24px;flex:1;display:flex;flex-direction:column}
.related-card .info h3{font-size:1.05rem;font-weight:600;margin-bottom:8px;line-height:1.4;color:var(--text)}
.related-card .info h3 a{color:var(--text);transition:var(--transition)}
.related-card .info h3 a:hover{color:var(--primary)}
.related-card .info p{font-size:0.88rem;color:var(--text-light);line-height:1.6;margin-bottom:12px;flex:1}
.related-card .info .meta{font-size:0.8rem;color:var(--text-muted);display:flex;align-items:center;gap:12px}
.related-card .info .meta i{font-size:0.75rem}
@media(max-width:1024px){
    .related-grid{grid-template-columns:repeat(2,1fr)}
}
@media(max-width:768px){
    .related-section{padding:40px 0}
    .related-section h2{font-size:1.4rem}
    .related-grid{grid-template-columns:1fr;gap:20px}
    .related-card .info{padding:16px 20px 20px}
}

/* CTA */
.cta-section{padding:80px 0;background:linear-gradient(135deg,#1e293b 0%,#0f172a 100%);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:0.08;mix-blend-mode:overlay}
.cta-section .container{position:relative;z-index:1;text-align:center}
.cta-section h2{font-size:2rem;font-weight:800;color:#fff;margin-bottom:16px;letter-spacing:-0.3px}
.cta-section p{font-size:1.1rem;color:rgba(255,255,255,0.8);max-width:600px;margin:0 auto 32px;line-height:1.7}
.cta-section .btn-group{display:flex;justify-content:center;gap:16px;flex-wrap:wrap}
.cta-section .btn-primary{background:#fff;color:var(--primary);box-shadow:0 4px 20px rgba(0,0,0,0.2);padding:14px 40px;font-size:1.05rem}
.cta-section .btn-primary:hover{background:var(--accent);color:#fff;box-shadow:0 8px 32px rgba(245,158,11,0.3)}
.cta-section .btn-outline{display:inline-flex;align-items:center;gap:8px;padding:14px 40px;border-radius:50px;border:2px solid rgba(255,255,255,0.3);color:rgba(255,255,255,0.9);font-size:1.05rem;font-weight:600;transition:var(--transition)}
.cta-section .btn-outline:hover{border-color:#fff;color:#fff;background:rgba(255,255,255,0.1)}
@media(max-width:768px){
    .cta-section{padding:60px 0}
    .cta-section h2{font-size:1.5rem}
    .cta-section p{font-size:0.98rem}
    .cta-section .btn-primary,.cta-section .btn-outline{padding:12px 28px;font-size:0.95rem;width:100%}
}

/* Not Found */
.not-found{text-align:center;padding:80px 20px}
.not-found i{font-size:4rem;color:var(--text-muted);margin-bottom:24px;display:block}
.not-found h2{font-size:1.8rem;font-weight:700;margin-bottom:12px;color:var(--text)}
.not-found p{font-size:1.05rem;color:var(--text-light);margin-bottom:28px}
.not-found .btn-primary{display:inline-flex}

/* Footer */
.site-footer{background:#0f172a;color:rgba(255,255,255,0.7);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 a{color:#fff;font-size:1.25rem}
.footer-brand .logo a i{color:var(--accent)}
.footer-brand p{margin-top:16px;font-size:0.9rem;line-height:1.7;color:rgba(255,255,255,0.55);max-width:360px}
.footer-col h4{color:#fff;font-size:1rem;font-weight:600;margin-bottom:20px;letter-spacing:0.3px}
.footer-col ul{list-style:none;display:flex;flex-direction:column;gap:12px}
.footer-col ul li a{color:rgba(255,255,255,0.55);font-size:0.9rem;transition:var(--transition);display:flex;align-items:center;gap:8px}
.footer-col ul li a:hover{color:var(--accent);padding-left:4px}
.footer-bottom{display:flex;justify-content:space-between;align-items:center;padding:24px 0;flex-wrap:wrap;gap:12px;font-size:0.85rem;color:rgba(255,255,255,0.4)}
.footer-bottom a{color:rgba(255,255,255,0.5);transition:var(--transition)}
.footer-bottom a:hover{color:var(--accent)}
@media(max-width:1024px){
    .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
}
@media(max-width:768px){
    .site-footer{padding:40px 0 0}
    .footer-grid{grid-template-columns:1fr;gap:28px}
    .footer-bottom{flex-direction:column;text-align:center}
    .footer-brand p{max-width:100%}
}