/* roulang page: index */
/* ===== 设计变量 ===== */
        :root {
            --primary: #0f1b33;
            --primary-light: #1a2d4f;
            --primary-mid: #273d61;
            --secondary: #2d6bcb;
            --secondary-light: #4a8ae8;
            --accent: #e8a838;
            --accent-light: #f0c06a;
            --bg: #f4f7fc;
            --bg-card: #ffffff;
            --bg-dark: #0a1628;
            --bg-section-alt: #eaf0f8;
            --text: #1a1a2e;
            --text-light: #6b7a8f;
            --text-muted: #9aabbf;
            --white: #ffffff;
            --border: #dce3ed;
            --border-light: #e8edf4;
            --shadow: 0 2px 16px rgba(10, 22, 40, 0.08);
            --shadow-hover: 0 8px 32px rgba(10, 22, 40, 0.14);
            --shadow-lg: 0 12px 48px rgba(10, 22, 40, 0.18);
            --radius: 14px;
            --radius-sm: 8px;
            --radius-xs: 4px;
            --radius-full: 999px;
            --nav-width: 240px;
            --header-height: 64px;
            --font: -apple-system, "PingFang SC", "Microsoft YaHei", "Helvetica Neue", sans-serif;
            --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
            --max-width: 1200px;
        }

        /* ===== 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);
            color: var(--text);
            background: var(--bg);
            line-height: 1.6;
            font-size: 16px;
            display: flex;
            min-height: 100vh;
        }
        a {
            color: var(--secondary);
            text-decoration: none;
            transition: color var(--transition);
        }
        a:hover {
            color: var(--secondary-light);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        button,
        input,
        textarea {
            font-family: inherit;
            font-size: inherit;
            border: none;
            outline: none;
        }
        button {
            cursor: pointer;
        }
        ul,
        ol {
            list-style: none;
        }
        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            line-height: 1.3;
            font-weight: 700;
            color: var(--primary);
        }
        h1 {
            font-size: clamp(2rem, 4.5vw, 3.2rem);
        }
        h2 {
            font-size: clamp(1.5rem, 3vw, 2.2rem);
            margin-bottom: 0.5em;
        }
        h3 {
            font-size: clamp(1.1rem, 2vw, 1.4rem);
        }
        p {
            margin-bottom: 1em;
            color: var(--text-light);
        }
        .container {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
            width: 100%;
        }

        /* ===== 左侧导航 ===== */
        .app-sidebar {
            position: fixed;
            top: 0;
            left: 0;
            width: var(--nav-width);
            height: 100vh;
            background: var(--primary);
            color: var(--white);
            display: flex;
            flex-direction: column;
            z-index: 1000;
            transition: transform var(--transition);
            overflow-y: auto;
            box-shadow: 2px 0 20px rgba(0, 0, 0, 0.2);
        }
        .sidebar-brand {
            padding: 28px 20px 20px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
            display: flex;
            align-items: center;
            gap: 12px;
        }
        .sidebar-brand .brand-icon {
            width: 40px;
            height: 40px;
            background: var(--accent);
            border-radius: var(--radius-sm);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 22px;
            color: var(--primary);
            flex-shrink: 0;
        }
        .sidebar-brand .brand-text {
            font-size: 18px;
            font-weight: 700;
            letter-spacing: 0.5px;
            color: var(--white);
            line-height: 1.2;
        }
        .sidebar-brand .brand-sub {
            font-size: 11px;
            color: rgba(255, 255, 255, 0.5);
            letter-spacing: 1px;
            margin-top: 2px;
        }
        .sidebar-nav {
            padding: 16px 12px;
            flex: 1;
        }
        .sidebar-nav .nav-label {
            font-size: 11px;
            text-transform: uppercase;
            letter-spacing: 1.5px;
            color: rgba(255, 255, 255, 0.3);
            padding: 12px 12px 6px;
            font-weight: 600;
        }
        .sidebar-nav a {
            display: flex;
            align-items: center;
            gap: 12px;
            padding: 12px 16px;
            border-radius: var(--radius-sm);
            color: rgba(255, 255, 255, 0.7);
            font-size: 15px;
            font-weight: 500;
            transition: all var(--transition);
            margin-bottom: 2px;
        }
        .sidebar-nav a i {
            width: 20px;
            text-align: center;
            font-size: 16px;
        }
        .sidebar-nav a:hover {
            background: rgba(255, 255, 255, 0.08);
            color: var(--white);
        }
        .sidebar-nav a.active {
            background: var(--secondary);
            color: var(--white);
            box-shadow: 0 4px 12px rgba(45, 107, 203, 0.3);
        }
        .sidebar-footer {
            padding: 16px 20px;
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            font-size: 11px;
            color: rgba(255, 255, 255, 0.35);
            text-align: center;
        }

        /* ===== 主内容区 ===== */
        .app-main {
            margin-left: var(--nav-width);
            flex: 1;
            min-height: 100vh;
            display: flex;
            flex-direction: column;
            width: calc(100% - var(--nav-width));
        }

        /* ===== 移动端顶部栏 ===== */
        .mobile-header {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            height: var(--header-height);
            background: var(--primary);
            z-index: 999;
            padding: 0 16px;
            align-items: center;
            justify-content: space-between;
            box-shadow: 0 2px 12px rgba(0, 0, 0, 0.15);
        }
        .mobile-header .mobile-brand {
            display: flex;
            align-items: center;
            gap: 10px;
            color: var(--white);
            font-weight: 700;
            font-size: 17px;
        }
        .mobile-header .mobile-brand .brand-icon {
            width: 34px;
            height: 34px;
            background: var(--accent);
            border-radius: var(--radius-xs);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 18px;
            color: var(--primary);
        }
        .mobile-toggle {
            width: 40px;
            height: 40px;
            background: transparent;
            color: var(--white);
            font-size: 22px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: var(--radius-sm);
            cursor: pointer;
            transition: background var(--transition);
        }
        .mobile-toggle:hover {
            background: rgba(255, 255, 255, 0.1);
        }
        .sidebar-overlay {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: rgba(0, 0, 0, 0.5);
            z-index: 999;
            backdrop-filter: blur(4px);
        }

        /* ===== Hero 首屏 ===== */
        .hero {
            position: relative;
            padding: 80px 0 100px;
            background: var(--bg-dark);
            background-image: url('/assets/images/backpic/back-1.png');
            background-size: cover;
            background-position: center;
            background-blend-mode: overlay;
            color: var(--white);
            overflow: hidden;
        }
        .hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(10, 22, 40, 0.82) 0%, rgba(15, 27, 51, 0.6) 100%);
            z-index: 1;
        }
        .hero .container {
            position: relative;
            z-index: 2;
        }
        .hero .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(232, 168, 56, 0.18);
            border: 1px solid rgba(232, 168, 56, 0.3);
            color: var(--accent);
            padding: 6px 18px;
            border-radius: var(--radius-full);
            font-size: 13px;
            font-weight: 600;
            margin-bottom: 24px;
            backdrop-filter: blur(4px);
        }
        .hero h1 {
            color: var(--white);
            font-size: clamp(2.2rem, 5vw, 3.6rem);
            max-width: 720px;
            margin-bottom: 20px;
            letter-spacing: -0.5px;
        }
        .hero h1 span {
            color: var(--accent);
        }
        .hero p {
            color: rgba(255, 255, 255, 0.75);
            font-size: clamp(1rem, 1.8vw, 1.2rem);
            max-width: 600px;
            margin-bottom: 32px;
            line-height: 1.7;
        }
        .hero .hero-actions {
            display: flex;
            gap: 16px;
            flex-wrap: wrap;
        }
        .hero .hero-stats {
            display: flex;
            gap: 40px;
            margin-top: 48px;
            padding-top: 32px;
            border-top: 1px solid rgba(255, 255, 255, 0.1);
        }
        .hero .hero-stats .stat-item {
            text-align: center;
        }
        .hero .hero-stats .stat-number {
            font-size: 28px;
            font-weight: 800;
            color: var(--white);
            display: block;
            line-height: 1.2;
        }
        .hero .hero-stats .stat-label {
            font-size: 13px;
            color: rgba(255, 255, 255, 0.5);
            margin-top: 4px;
        }

        /* ===== 按钮 ===== */
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 28px;
            border-radius: var(--radius-full);
            font-weight: 600;
            font-size: 15px;
            transition: all var(--transition);
            border: 2px solid transparent;
            background: var(--secondary);
            color: var(--white);
            box-shadow: 0 4px 14px rgba(45, 107, 203, 0.25);
        }
        .btn:hover {
            background: var(--secondary-light);
            color: var(--white);
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(45, 107, 203, 0.35);
        }
        .btn:active {
            transform: translateY(0);
        }
        .btn-outline {
            background: transparent;
            border-color: rgba(255, 255, 255, 0.3);
            color: var(--white);
            box-shadow: none;
        }
        .btn-outline:hover {
            border-color: var(--white);
            background: rgba(255, 255, 255, 0.08);
            color: var(--white);
            box-shadow: none;
        }
        .btn-accent {
            background: var(--accent);
            color: var(--primary);
            box-shadow: 0 4px 14px rgba(232, 168, 56, 0.3);
        }
        .btn-accent:hover {
            background: var(--accent-light);
            color: var(--primary);
            box-shadow: 0 8px 24px rgba(232, 168, 56, 0.4);
        }
        .btn-sm {
            padding: 8px 18px;
            font-size: 13px;
            border-radius: var(--radius-sm);
        }
        .btn-sm i {
            font-size: 12px;
        }

        /* ===== 板块通用 ===== */
        .section {
            padding: 80px 0;
        }
        .section-alt {
            background: var(--bg-section-alt);
        }
        .section-dark {
            background: var(--bg-dark);
            color: var(--white);
        }
        .section-dark h2,
        .section-dark h3 {
            color: var(--white);
        }
        .section-dark p {
            color: rgba(255, 255, 255, 0.7);
        }
        .section-header {
            text-align: center;
            margin-bottom: 52px;
        }
        .section-header .section-tag {
            display: inline-block;
            background: rgba(45, 107, 203, 0.1);
            color: var(--secondary);
            padding: 4px 16px;
            border-radius: var(--radius-full);
            font-size: 13px;
            font-weight: 600;
            margin-bottom: 12px;
        }
        .section-header h2 {
            margin-bottom: 12px;
        }
        .section-header p {
            max-width: 580px;
            margin: 0 auto;
            font-size: 1.05rem;
        }
        .section-dark .section-tag {
            background: rgba(232, 168, 56, 0.15);
            color: var(--accent);
        }

        /* ===== 卡片 ===== */
        .card {
            background: var(--bg-card);
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            overflow: hidden;
            transition: all var(--transition);
            border: 1px solid var(--border-light);
        }
        .card:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-4px);
        }
        .card .card-img {
            width: 100%;
            height: 200px;
            object-fit: cover;
            display: block;
        }
        .card .card-body {
            padding: 24px;
        }
        .card .card-tag {
            display: inline-block;
            background: rgba(45, 107, 203, 0.08);
            color: var(--secondary);
            padding: 2px 12px;
            border-radius: var(--radius-xs);
            font-size: 12px;
            font-weight: 600;
            margin-bottom: 10px;
        }
        .card .card-title {
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 8px;
            color: var(--primary);
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .card .card-text {
            font-size: 14px;
            color: var(--text-light);
            margin-bottom: 16px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .card .card-meta {
            display: flex;
            align-items: center;
            gap: 16px;
            font-size: 12px;
            color: var(--text-muted);
            padding-top: 12px;
            border-top: 1px solid var(--border-light);
        }
        .card .card-meta i {
            margin-right: 4px;
        }

        /* ===== 网格 ===== */
        .grid-3 {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }
        .grid-4 {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }
        .grid-2 {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 28px;
        }

        /* ===== 特点/图标卡片 ===== */
        .feature-card {
            text-align: center;
            padding: 36px 24px;
            background: var(--bg-card);
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            transition: all var(--transition);
            border: 1px solid var(--border-light);
        }
        .feature-card:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-4px);
        }
        .feature-card .feature-icon {
            width: 64px;
            height: 64px;
            margin: 0 auto 20px;
            background: rgba(45, 107, 203, 0.08);
            border-radius: var(--radius);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 28px;
            color: var(--secondary);
            transition: all var(--transition);
        }
        .feature-card:hover .feature-icon {
            background: var(--secondary);
            color: var(--white);
        }
        .feature-card h3 {
            font-size: 18px;
            margin-bottom: 10px;
        }
        .feature-card p {
            font-size: 14px;
            color: var(--text-light);
            margin-bottom: 0;
        }

        /* ===== 标签/徽章 ===== */
        .tag {
            display: inline-flex;
            align-items: center;
            gap: 4px;
            padding: 4px 14px;
            border-radius: var(--radius-full);
            font-size: 12px;
            font-weight: 600;
            background: rgba(45, 107, 203, 0.08);
            color: var(--secondary);
            transition: all var(--transition);
        }
        .tag:hover {
            background: var(--secondary);
            color: var(--white);
        }
        .tag-accent {
            background: rgba(232, 168, 56, 0.12);
            color: var(--accent);
        }
        .tag-accent:hover {
            background: var(--accent);
            color: var(--primary);
        }

        /* ===== 列表 ===== */
        .list-card {
            display: flex;
            gap: 20px;
            padding: 20px 24px;
            background: var(--bg-card);
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            transition: all var(--transition);
            border: 1px solid var(--border-light);
        }
        .list-card:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-2px);
        }
        .list-card .list-num {
            font-size: 24px;
            font-weight: 800;
            color: var(--secondary);
            min-width: 40px;
            line-height: 1.2;
        }
        .list-card .list-content {
            flex: 1;
        }
        .list-card .list-content h4 {
            font-size: 16px;
            margin-bottom: 4px;
        }
        .list-card .list-content p {
            font-size: 14px;
            color: var(--text-light);
            margin-bottom: 0;
        }

        /* ===== FAQ ===== */
        .faq-item {
            background: var(--bg-card);
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            border: 1px solid var(--border-light);
            margin-bottom: 12px;
            overflow: hidden;
            transition: all var(--transition);
        }
        .faq-item:hover {
            box-shadow: var(--shadow-hover);
        }
        .faq-question {
            padding: 20px 24px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            font-weight: 600;
            font-size: 16px;
            color: var(--primary);
            cursor: pointer;
            background: transparent;
            width: 100%;
            text-align: left;
            transition: background var(--transition);
        }
        .faq-question:hover {
            background: rgba(45, 107, 203, 0.03);
        }
        .faq-question i {
            color: var(--secondary);
            transition: transform var(--transition);
            font-size: 14px;
        }
        .faq-question.active i {
            transform: rotate(180deg);
        }
        .faq-answer {
            padding: 0 24px 20px;
            font-size: 15px;
            color: var(--text-light);
            line-height: 1.7;
            display: none;
        }
        .faq-answer.show {
            display: block;
        }
        .section-dark .faq-item {
            background: rgba(255, 255, 255, 0.05);
            border-color: rgba(255, 255, 255, 0.08);
        }
        .section-dark .faq-question {
            color: var(--white);
        }
        .section-dark .faq-question:hover {
            background: rgba(255, 255, 255, 0.05);
        }
        .section-dark .faq-answer {
            color: rgba(255, 255, 255, 0.7);
        }

        /* ===== CTA ===== */
        .cta-section {
            background: var(--bg-dark);
            background-image: url('/assets/images/backpic/back-2.png');
            background-size: cover;
            background-position: center;
            background-blend-mode: overlay;
            padding: 80px 0;
            text-align: center;
            position: relative;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(10, 22, 40, 0.85) 0%, rgba(15, 27, 51, 0.7) 100%);
            z-index: 1;
        }
        .cta-section .container {
            position: relative;
            z-index: 2;
        }
        .cta-section h2 {
            color: var(--white);
            font-size: clamp(1.6rem, 3.5vw, 2.4rem);
            margin-bottom: 16px;
        }
        .cta-section p {
            color: rgba(255, 255, 255, 0.7);
            max-width: 540px;
            margin: 0 auto 28px;
            font-size: 1.05rem;
        }
        .cta-section .btn {
            font-size: 16px;
            padding: 14px 36px;
        }

        /* ===== 页脚 ===== */
        .app-footer {
            background: var(--primary);
            color: rgba(255, 255, 255, 0.6);
            padding: 40px 0 32px;
            margin-top: auto;
        }
        .app-footer .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 32px;
        }
        .app-footer .footer-brand .brand-text {
            font-size: 18px;
            font-weight: 700;
            color: var(--white);
            display: flex;
            align-items: center;
            gap: 10px;
            margin-bottom: 12px;
        }
        .app-footer .footer-brand .brand-text i {
            color: var(--accent);
        }
        .app-footer .footer-brand p {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.5);
            max-width: 360px;
            margin-bottom: 0;
        }
        .app-footer .footer-col h4 {
            font-size: 14px;
            font-weight: 700;
            color: var(--white);
            margin-bottom: 16px;
        }
        .app-footer .footer-col a {
            display: block;
            color: rgba(255, 255, 255, 0.5);
            font-size: 14px;
            padding: 4px 0;
            transition: color var(--transition);
        }
        .app-footer .footer-col a:hover {
            color: var(--accent);
        }
        .app-footer .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            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, 0.35);
        }
        .app-footer .footer-bottom a {
            color: rgba(255, 255, 255, 0.35);
        }
        .app-footer .footer-bottom a:hover {
            color: var(--accent);
        }
        .app-footer .footer-social {
            display: flex;
            gap: 12px;
        }
        .app-footer .footer-social a {
            width: 36px;
            height: 36px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.06);
            display: flex;
            align-items: center;
            justify-content: center;
            color: rgba(255, 255, 255, 0.5);
            transition: all var(--transition);
        }
        .app-footer .footer-social a:hover {
            background: var(--accent);
            color: var(--primary);
        }

        /* ===== 工具类 ===== */
        .text-center {
            text-align: center;
        }
        .mt-16 {
            margin-top: 16px;
        }
        .mt-24 {
            margin-top: 24px;
        }
        .mt-32 {
            margin-top: 32px;
        }
        .mb-16 {
            margin-bottom: 16px;
        }
        .gap-16 {
            gap: 16px;
        }
        .flex-center {
            display: flex;
            align-items: center;
            justify-content: center;
        }
        .flex-between {
            display: flex;
            align-items: center;
            justify-content: space-between;
        }

        /* ===== 响应式 ===== */
        @media (max-width: 1024px) {
            .grid-4 {
                grid-template-columns: repeat(2, 1fr);
            }
            .app-footer .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
        }

        @media (max-width: 768px) {
            body {
                flex-direction: column;
            }
            .app-sidebar {
                transform: translateX(-100%);
            }
            .app-sidebar.open {
                transform: translateX(0);
            }
            .sidebar-overlay.open {
                display: block;
            }
            .mobile-header {
                display: flex;
            }
            .app-main {
                margin-left: 0;
                width: 100%;
                padding-top: var(--header-height);
            }
            .hero {
                padding: 60px 0 70px;
            }
            .hero .hero-stats {
                gap: 24px;
                flex-wrap: wrap;
            }
            .hero .hero-stats .stat-number {
                font-size: 22px;
            }
            .section {
                padding: 50px 0;
            }
            .grid-3,
            .grid-2 {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .grid-4 {
                grid-template-columns: repeat(2, 1fr);
                gap: 16px;
            }
            .app-footer .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .app-footer .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
            .list-card {
                flex-direction: column;
                gap: 12px;
            }
            .list-card .list-num {
                font-size: 20px;
            }
            .faq-question {
                font-size: 14px;
                padding: 16px 18px;
            }
            .faq-answer {
                padding: 0 18px 16px;
                font-size: 14px;
            }
            .hero .hero-actions {
                flex-direction: column;
            }
            .hero .hero-actions .btn {
                width: 100%;
                justify-content: center;
            }
        }

        @media (max-width: 520px) {
            .grid-4 {
                grid-template-columns: 1fr;
            }
            .container {
                padding: 0 16px;
            }
            .hero h1 {
                font-size: 1.8rem;
            }
            .hero .hero-stats {
                flex-direction: column;
                gap: 16px;
                align-items: flex-start;
            }
            .hero .hero-stats .stat-item {
                text-align: left;
                display: flex;
                gap: 12px;
                align-items: baseline;
            }
            .hero .hero-stats .stat-number {
                font-size: 20px;
            }
            .feature-card {
                padding: 24px 16px;
            }
            .card .card-body {
                padding: 16px;
            }
            .card .card-img {
                height: 160px;
            }
            .section-header {
                margin-bottom: 32px;
            }
            .btn {
                padding: 10px 20px;
                font-size: 14px;
            }
        }

        /* ===== 辅助 ===== */
        .sr-only {
            position: absolute;
            width: 1px;
            height: 1px;
            padding: 0;
            margin: -1px;
            overflow: hidden;
            clip: rect(0, 0, 0, 0);
            border: 0;
        }
        .focus-ring:focus-visible {
            outline: 2px solid var(--secondary);
            outline-offset: 2px;
        }

        /* ===== 文章内容样式 ===== */
        .article-content {
            font-size: 16px;
            line-height: 1.8;
            color: var(--text);
        }
        .article-content p {
            margin-bottom: 1.2em;
            color: var(--text);
        }
        .article-content img {
            border-radius: var(--radius-sm);
            margin: 24px 0;
        }
        .article-content h2,
        .article-content h3 {
            margin-top: 1.5em;
            margin-bottom: 0.6em;
        }
        .article-content ul,
        .article-content ol {
            list-style: disc;
            padding-left: 24px;
            margin-bottom: 1.2em;
            color: var(--text-light);
        }
        .article-content li {
            margin-bottom: 6px;
        }
        .article-content blockquote {
            border-left: 4px solid var(--secondary);
            padding: 12px 20px;
            margin: 20px 0;
            background: rgba(45, 107, 203, 0.04);
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            font-style: italic;
            color: var(--text-light);
        }

        /* ===== 分类页卡片 ===== */
        .category-card {
            display: flex;
            flex-direction: column;
            background: var(--bg-card);
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            overflow: hidden;
            transition: all var(--transition);
            border: 1px solid var(--border-light);
        }
        .category-card:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-4px);
        }
        .category-card .cat-img {
            height: 180px;
            object-fit: cover;
            width: 100%;
        }
        .category-card .cat-body {
            padding: 20px 24px 24px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .category-card .cat-body .cat-tag {
            display: inline-block;
            background: rgba(232, 168, 56, 0.1);
            color: var(--accent);
            padding: 2px 12px;
            border-radius: var(--radius-xs);
            font-size: 12px;
            font-weight: 600;
            margin-bottom: 10px;
            align-self: flex-start;
        }
        .category-card .cat-body h3 {
            font-size: 18px;
            margin-bottom: 8px;
        }
        .category-card .cat-body p {
            font-size: 14px;
            color: var(--text-light);
            margin-bottom: 16px;
            flex: 1;
        }
        .category-card .cat-body .btn {
            align-self: flex-start;
        }

/* roulang page: category1 */
:root {
  --primary: #1a2a4a;
  --primary-light: #2c4a7a;
  --accent: #e8a838;
  --accent-hover: #f0b84a;
  --accent-dim: rgba(232,168,56,0.12);
  --bg-body: #f5f7fb;
  --bg-card: #ffffff;
  --bg-sidebar: #0f1a2e;
  --bg-sidebar-hover: rgba(255,255,255,0.06);
  --text-body: #1e2a3a;
  --text-muted: #6b7a8f;
  --text-light: #8a9bb0;
  --text-inverse: #f0f4f8;
  --border-color: #e2e8f0;
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --shadow-sm: 0 2px 6px rgba(0,0,0,0.04);
  --shadow-md: 0 6px 20px rgba(0,0,0,0.07);
  --shadow-lg: 0 14px 40px rgba(0,0,0,0.10);
  --transition: all 0.25s ease;
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  --sidebar-width: 240px;
}
*,
*::before,
*::after { box-sizing: border-box; margin: 0; padding: 0; }
html { font-size: 16px; scroll-behavior: smooth; }
body {
  font-family: var(--font-sans);
  color: var(--text-body);
  background: var(--bg-body);
  line-height: 1.6;
  display: flex;
  min-height: 100vh;
}
a { color: var(--primary-light); text-decoration: none; transition: var(--transition); }
a:hover { color: var(--accent); }
img { max-width: 100%; height: auto; display: block; }
ul, ol { list-style: none; }
input, button, textarea { font-family: inherit; font-size: inherit; }
button { cursor: pointer; border: none; background: none; }
.container { width: 100%; max-width: 1200px; margin: 0 auto; padding: 0 24px; }

/* ===== Sidebar ===== */
.app-sidebar {
  position: fixed;
  top: 0; left: 0;
  width: var(--sidebar-width);
  height: 100vh;
  background: var(--bg-sidebar);
  color: var(--text-inverse);
  display: flex;
  flex-direction: column;
  z-index: 1000;
  transition: transform 0.3s ease;
  overflow-y: auto;
}
.sidebar-brand {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 28px 20px 18px;
  border-bottom: 1px solid rgba(255,255,255,0.06);
}
.brand-icon { font-size: 28px; color: var(--accent); }
.brand-text { font-size: 18px; font-weight: 700; color: #fff; line-height: 1.2; }
.brand-sub { font-size: 12px; color: var(--text-light); margin-top: 2px; }
.sidebar-nav { flex: 1; padding: 16px 12px; }
.nav-label { font-size: 11px; text-transform: uppercase; letter-spacing: 1px; color: var(--text-light); padding: 12px 12px 8px; font-weight: 600; }
.sidebar-nav a {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 14px;
  border-radius: var(--radius-sm);
  color: rgba(255,255,255,0.72);
  font-size: 15px;
  transition: var(--transition);
  margin-bottom: 2px;
}
.sidebar-nav a i { width: 20px; text-align: center; font-size: 16px; }
.sidebar-nav a:hover { background: var(--bg-sidebar-hover); color: #fff; }
.sidebar-nav a.active { background: var(--accent-dim); color: var(--accent); font-weight: 600; }
.sidebar-footer {
  padding: 16px 20px;
  border-top: 1px solid rgba(255,255,255,0.06);
  font-size: 12px;
  color: var(--text-light);
  text-align: center;
}

/* ===== Main Content ===== */
.main-content {
  margin-left: var(--sidebar-width);
  flex: 1;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* ===== Top Bar (mobile toggle) ===== */
.top-bar {
  display: none;
  position: sticky;
  top: 0;
  z-index: 900;
  background: var(--bg-sidebar);
  color: #fff;
  padding: 12px 20px;
  align-items: center;
  gap: 14px;
  box-shadow: 0 2px 8px rgba(0,0,0,0.12);
}
.top-bar .menu-toggle { font-size: 22px; color: #fff; background: none; border: none; padding: 4px; }
.top-bar .bar-brand { font-size: 17px; font-weight: 700; flex: 1; }
.top-bar .bar-brand i { color: var(--accent); margin-right: 8px; }

/* ===== Hero / Banner ===== */
.category-banner {
  position: relative;
  background: var(--primary) url('/assets/images/backpic/back-2.png') center/cover no-repeat;
  padding: 72px 0 64px;
  color: #fff;
  text-align: center;
}
.category-banner::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(15,26,46,0.82) 0%, rgba(26,42,74,0.65) 100%);
}
.category-banner .container { position: relative; z-index: 1; }
.category-banner h1 { font-size: 38px; font-weight: 800; margin-bottom: 16px; letter-spacing: 1px; }
.category-banner h1 i { color: var(--accent); margin-right: 10px; }
.category-banner p { font-size: 17px; max-width: 680px; margin: 0 auto 24px; color: rgba(255,255,255,0.85); line-height: 1.7; }
.banner-stats { display: flex; justify-content: center; gap: 40px; flex-wrap: wrap; margin-top: 8px; }
.banner-stats .stat-item { text-align: center; }
.banner-stats .stat-num { font-size: 30px; font-weight: 800; color: var(--accent); display: block; }
.banner-stats .stat-label { font-size: 13px; color: rgba(255,255,255,0.75); margin-top: 2px; }

/* ===== Sections ===== */
.section { padding: 64px 0; }
.section-alt { background: var(--bg-card); }
.section-header { text-align: center; margin-bottom: 44px; }
.section-header h2 { font-size: 30px; font-weight: 700; color: var(--primary); margin-bottom: 10px; }
.section-header h2 i { color: var(--accent); margin-right: 8px; }
.section-header p { color: var(--text-muted); max-width: 600px; margin: 0 auto; font-size: 16px; }

/* ===== Guide Grid ===== */
.guide-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.guide-card {
  background: var(--bg-card);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
  border: 1px solid var(--border-color);
}
.guide-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }
.guide-card .card-img { width: 100%; height: 200px; object-fit: cover; background: var(--border-color); }
.guide-card .card-body { padding: 22px 20px 24px; }
.guide-card .card-tag { display: inline-block; background: var(--accent-dim); color: var(--accent); font-size: 12px; padding: 2px 10px; border-radius: 20px; font-weight: 600; margin-bottom: 10px; }
.guide-card h3 { font-size: 18px; font-weight: 700; margin-bottom: 8px; color: var(--primary); }
.guide-card p { font-size: 14px; color: var(--text-muted); line-height: 1.65; margin-bottom: 14px; }
.guide-card .card-meta { font-size: 13px; color: var(--text-light); display: flex; align-items: center; gap: 16px; }
.guide-card .card-meta i { margin-right: 4px; }

/* ===== Steps / Process ===== */
.steps-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  counter-reset: step;
}
.step-card {
  background: var(--bg-card);
  border-radius: var(--radius-md);
  padding: 28px 20px;
  text-align: center;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border-color);
  transition: var(--transition);
  position: relative;
}
.step-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-md); }
.step-card .step-num {
  width: 44px; height: 44px;
  background: var(--accent);
  color: var(--bg-sidebar);
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-size: 20px; font-weight: 800;
  margin: 0 auto 14px;
}
.step-card h4 { font-size: 16px; font-weight: 700; color: var(--primary); margin-bottom: 6px; }
.step-card p { font-size: 13px; color: var(--text-muted); line-height: 1.6; }

/* ===== Tool / Resource List ===== */
.tool-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
}
.tool-item {
  display: flex;
  align-items: center;
  gap: 14px;
  background: var(--bg-card);
  border-radius: var(--radius-sm);
  padding: 16px 18px;
  border: 1px solid var(--border-color);
  transition: var(--transition);
}
.tool-item:hover { border-color: var(--accent); box-shadow: var(--shadow-sm); transform: translateX(3px); }
.tool-item .tool-icon { width: 42px; height: 42px; background: var(--accent-dim); border-radius: var(--radius-sm); display: flex; align-items: center; justify-content: center; font-size: 20px; color: var(--accent); flex-shrink: 0; }
.tool-item .tool-info h4 { font-size: 15px; font-weight: 600; color: var(--primary); }
.tool-item .tool-info p { font-size: 13px; color: var(--text-muted); margin-top: 2px; }

/* ===== FAQ ===== */
.faq-list { max-width: 760px; margin: 0 auto; display: flex; flex-direction: column; gap: 10px; }
.faq-item { background: var(--bg-card); border-radius: var(--radius-md); border: 1px solid var(--border-color); overflow: hidden; transition: var(--transition); }
.faq-item summary { padding: 16px 20px; font-weight: 600; color: var(--primary); cursor: pointer; display: flex; align-items: center; gap: 10px; font-size: 15px; }
.faq-item summary i { color: var(--accent); font-size: 14px; transition: var(--transition); }
.faq-item[open] summary i { transform: rotate(90deg); }
.faq-item .faq-body { padding: 0 20px 18px; color: var(--text-muted); line-height: 1.7; font-size: 14px; }

/* ===== CTA ===== */
.cta-section {
  background: var(--primary) url('/assets/images/backpic/back-3.png') center/cover no-repeat;
  position: relative;
  padding: 64px 0;
  text-align: center;
  color: #fff;
}
.cta-section::before { content: ''; position: absolute; inset: 0; background: rgba(15,26,46,0.78); }
.cta-section .container { position: relative; z-index: 1; }
.cta-section h2 { font-size: 30px; font-weight: 700; margin-bottom: 12px; }
.cta-section p { font-size: 16px; color: rgba(255,255,255,0.8); max-width: 560px; margin: 0 auto 28px; }
.btn-group { display: flex; justify-content: center; gap: 16px; flex-wrap: wrap; }
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 32px;
  border-radius: 60px;
  font-weight: 600;
  font-size: 15px;
  transition: var(--transition);
  border: 2px solid transparent;
}
.btn-accent { background: var(--accent); color: var(--bg-sidebar); border-color: var(--accent); }
.btn-accent:hover { background: var(--accent-hover); color: var(--bg-sidebar); transform: translateY(-2px); box-shadow: 0 6px 20px rgba(232,168,56,0.35); }
.btn-outline-light { background: transparent; color: #fff; border-color: rgba(255,255,255,0.5); }
.btn-outline-light:hover { background: rgba(255,255,255,0.12); border-color: #fff; color: #fff; }

/* ===== Footer ===== */
.app-footer { background: var(--bg-sidebar); color: rgba(255,255,255,0.85); padding: 48px 0 0; }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1.2fr; gap: 32px; padding-bottom: 32px; border-bottom: 1px solid rgba(255,255,255,0.06); }
.footer-brand .brand-text { font-size: 20px; color: #fff; }
.footer-brand .brand-text i { color: var(--accent); margin-right: 6px; }
.footer-brand p { font-size: 14px; color: rgba(255,255,255,0.65); line-height: 1.7; margin-top: 12px; }
.footer-col h4 { font-size: 15px; color: #fff; margin-bottom: 14px; font-weight: 600; }
.footer-col a { display: block; color: rgba(255,255,255,0.6); font-size: 14px; padding: 4px 0; transition: var(--transition); }
.footer-col a:hover { color: var(--accent); padding-left: 4px; }
.footer-col a i { margin-right: 6px; width: 18px; }
.footer-bottom { display: flex; justify-content: space-between; align-items: center; padding: 20px 0; font-size: 13px; color: rgba(255,255,255,0.5); flex-wrap: wrap; gap: 10px; }
.footer-social { display: flex; gap: 12px; }
.footer-social a { color: rgba(255,255,255,0.5); font-size: 18px; transition: var(--transition); }
.footer-social a:hover { color: var(--accent); transform: scale(1.1); }
.tag { display: inline-flex; align-items: center; gap: 4px; padding: 2px 10px; border-radius: 20px; font-size: 12px; font-weight: 500; }

/* ===== Responsive ===== */
@media (max-width: 1024px) {
  .guide-grid { grid-template-columns: repeat(2, 1fr); }
  .steps-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 820px) {
  :root { --sidebar-width: 0px; }
  .app-sidebar { transform: translateX(-100%); }
  .app-sidebar.open { transform: translateX(0); width: 260px; }
  .top-bar { display: flex; }
  .main-content { margin-left: 0; }
  .category-banner { padding: 48px 0 40px; }
  .category-banner h1 { font-size: 28px; }
  .banner-stats { gap: 24px; }
  .banner-stats .stat-num { font-size: 24px; }
}
@media (max-width: 640px) {
  .container { padding: 0 16px; }
  .section { padding: 40px 0; }
  .section-header h2 { font-size: 24px; }
  .guide-grid { grid-template-columns: 1fr; }
  .steps-grid { grid-template-columns: 1fr; }
  .tool-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; gap: 24px; }
  .footer-bottom { flex-direction: column; text-align: center; }
  .category-banner h1 { font-size: 22px; }
  .category-banner p { font-size: 15px; }
  .btn { padding: 10px 24px; font-size: 14px; }
  .cta-section h2 { font-size: 24px; }
  .sidebar-footer { font-size: 11px; }
}

/* roulang page: article */
/* ===== Design Variables ===== */
        :root {
            --primary: #1a2a4a;
            --primary-light: #2c3f6a;
            --primary-dark: #0e1a30;
            --accent: #e8a838;
            --accent-light: #f0c060;
            --accent-dark: #c88a20;
            --bg-body: #f5f7fb;
            --bg-card: #ffffff;
            --bg-sidebar: #0e1a30;
            --bg-sidebar-hover: #1a2a4a;
            --text-primary: #1a1a2e;
            --text-secondary: #4a4a6a;
            --text-light: #8a8aaa;
            --text-white: #f0f2f8;
            --text-sidebar: #b0b8d0;
            --border: #e2e6f0;
            --border-light: #f0f2f8;
            --radius-sm: 6px;
            --radius-md: 12px;
            --radius-lg: 20px;
            --shadow-sm: 0 2px 8px rgba(26,42,74,0.06);
            --shadow-md: 0 6px 24px rgba(26,42,74,0.08);
            --shadow-lg: 0 12px 40px rgba(26,42,74,0.12);
            --shadow-accent: 0 4px 16px rgba(232,168,56,0.25);
            --transition: 0.25s cubic-bezier(0.4,0,0.2,1);
            --sidebar-width: 240px;
            --header-height: 0px;
            --font-sans: 'Inter', system-ui, -apple-system, 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
            --font-display: 'Inter', system-ui, -apple-system, 'Segoe UI', sans-serif;
        }

        /* ===== 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-sans);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text-primary);
            background: var(--bg-body);
            display: flex;
            min-height: 100vh;
        }
        a { color: var(--accent); text-decoration: none; transition: color var(--transition); }
        a:hover { color: var(--accent-dark); }
        a:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; border-radius: 4px; }
        img { max-width: 100%; height: auto; display: block; border-radius: var(--radius-sm); }
        button, input, textarea { font-family: inherit; font-size: 1rem; }
        h1, h2, h3, h4, h5, h6 { font-family: var(--font-display); line-height: 1.3; color: var(--primary); font-weight: 700; }
        ul, ol { list-style: none; }
        .container { max-width: 1200px; margin: 0 auto; padding: 0 24px; width: 100%; }

        /* ===== Scrollbar ===== */
        ::-webkit-scrollbar { width: 6px; }
        ::-webkit-scrollbar-track { background: var(--bg-body); }
        ::-webkit-scrollbar-thumb { background: var(--border); border-radius: 8px; }
        ::-webkit-scrollbar-thumb:hover { background: var(--text-light); }

        /* ===== Sidebar Navigation ===== */
        .app-sidebar {
            position: fixed;
            top: 0;
            left: 0;
            width: var(--sidebar-width);
            height: 100vh;
            background: var(--bg-sidebar);
            color: var(--text-sidebar);
            display: flex;
            flex-direction: column;
            z-index: 1000;
            overflow-y: auto;
            overflow-x: hidden;
            border-right: 1px solid rgba(255,255,255,0.04);
            transition: transform var(--transition);
        }
        .sidebar-brand {
            display: flex;
            align-items: center;
            gap: 12px;
            padding: 28px 20px 20px;
            border-bottom: 1px solid rgba(255,255,255,0.06);
        }
        .sidebar-brand .brand-icon {
            width: 44px;
            height: 44px;
            background: linear-gradient(135deg, var(--accent), var(--accent-dark));
            border-radius: var(--radius-md);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 22px;
            color: #fff;
            flex-shrink: 0;
            box-shadow: 0 4px 12px rgba(232,168,56,0.3);
        }
        .sidebar-brand .brand-text {
            font-size: 18px;
            font-weight: 700;
            color: #fff;
            letter-spacing: 0.5px;
            line-height: 1.2;
        }
        .sidebar-brand .brand-sub {
            font-size: 12px;
            color: var(--accent-light);
            letter-spacing: 1px;
            opacity: 0.8;
            font-weight: 400;
        }
        .sidebar-nav {
            flex: 1;
            padding: 16px 12px;
            display: flex;
            flex-direction: column;
            gap: 4px;
        }
        .sidebar-nav .nav-label {
            font-size: 11px;
            text-transform: uppercase;
            letter-spacing: 1.5px;
            color: rgba(255,255,255,0.3);
            padding: 12px 12px 6px;
            font-weight: 600;
        }
        .sidebar-nav a {
            display: flex;
            align-items: center;
            gap: 12px;
            padding: 12px 16px;
            border-radius: var(--radius-sm);
            color: var(--text-sidebar);
            font-size: 15px;
            font-weight: 500;
            transition: all var(--transition);
            text-decoration: none;
        }
        .sidebar-nav a i { width: 20px; text-align: center; font-size: 16px; opacity: 0.7; }
        .sidebar-nav a:hover {
            background: var(--bg-sidebar-hover);
            color: #fff;
        }
        .sidebar-nav a.active {
            background: rgba(232,168,56,0.12);
            color: var(--accent-light);
            font-weight: 600;
        }
        .sidebar-nav a.active i { opacity: 1; }
        .sidebar-footer {
            padding: 16px 20px;
            font-size: 12px;
            color: rgba(255,255,255,0.25);
            border-top: 1px solid rgba(255,255,255,0.06);
            text-align: center;
            letter-spacing: 0.3px;
        }

        /* ===== Main Content Area ===== */
        .main-wrapper {
            margin-left: var(--sidebar-width);
            flex: 1;
            min-height: 100vh;
            display: flex;
            flex-direction: column;
        }
        .main-content {
            flex: 1;
            padding: 40px 0 60px;
        }

        /* ===== Mobile Menu Toggle ===== */
        .mobile-toggle {
            display: none;
            position: fixed;
            top: 12px;
            left: 12px;
            z-index: 1100;
            width: 44px;
            height: 44px;
            background: var(--primary);
            color: #fff;
            border: none;
            border-radius: var(--radius-sm);
            font-size: 20px;
            cursor: pointer;
            box-shadow: var(--shadow-md);
            transition: background var(--transition);
        }
        .mobile-toggle:hover { background: var(--primary-light); }
        .sidebar-overlay {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: rgba(0,0,0,0.4);
            z-index: 999;
            backdrop-filter: blur(2px);
        }

        /* ===== Article Detail ===== */
        .article-detail {
            max-width: 860px;
            margin: 0 auto;
            padding: 0 24px;
        }
        .article-header {
            margin-bottom: 32px;
        }
        .article-header .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 14px;
            color: var(--text-light);
            margin-bottom: 20px;
            flex-wrap: wrap;
        }
        .article-header .breadcrumb a {
            color: var(--text-secondary);
            text-decoration: none;
            transition: color var(--transition);
        }
        .article-header .breadcrumb a:hover { color: var(--accent); }
        .article-header .breadcrumb .sep { color: var(--border); }
        .article-header .breadcrumb .current { color: var(--text-light); }
        .article-header .post-meta {
            display: flex;
            align-items: center;
            gap: 16px;
            flex-wrap: wrap;
            margin-bottom: 16px;
        }
        .article-header .post-meta .category-badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 4px 14px;
            background: rgba(232,168,56,0.10);
            color: var(--accent-dark);
            border-radius: 20px;
            font-size: 13px;
            font-weight: 600;
            border: 1px solid rgba(232,168,56,0.15);
        }
        .article-header .post-meta .date {
            font-size: 14px;
            color: var(--text-light);
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .article-header .post-meta .date i { font-size: 13px; }
        .article-header h1 {
            font-size: 36px;
            font-weight: 800;
            color: var(--primary);
            line-height: 1.25;
            letter-spacing: -0.3px;
            margin-bottom: 12px;
        }
        .article-header .excerpt {
            font-size: 18px;
            color: var(--text-secondary);
            line-height: 1.6;
            border-left: 3px solid var(--accent);
            padding-left: 20px;
            margin-top: 8px;
        }
        .article-cover {
            margin-bottom: 32px;
            border-radius: var(--radius-md);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
        }
        .article-cover img {
            width: 100%;
            aspect-ratio: 16/9;
            object-fit: cover;
        }
        .article-body {
            font-size: 17px;
            line-height: 1.9;
            color: var(--text-primary);
        }
        .article-body p {
            margin-bottom: 1.4em;
        }
        .article-body h2, .article-body h3, .article-body h4 {
            margin-top: 1.8em;
            margin-bottom: 0.6em;
            color: var(--primary);
        }
        .article-body h2 { font-size: 26px; }
        .article-body h3 { font-size: 22px; }
        .article-body ul, .article-body ol {
            margin-bottom: 1.4em;
            padding-left: 24px;
        }
        .article-body ul li { list-style: disc; margin-bottom: 0.4em; }
        .article-body ol li { list-style: decimal; margin-bottom: 0.4em; }
        .article-body blockquote {
            border-left: 4px solid var(--accent);
            padding: 12px 20px;
            margin: 1.4em 0;
            background: rgba(232,168,56,0.05);
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            color: var(--text-secondary);
            font-style: italic;
        }
        .article-body img {
            border-radius: var(--radius-sm);
            margin: 1.2em 0;
            box-shadow: var(--shadow-sm);
        }
        .article-body a { text-decoration: underline; text-underline-offset: 2px; }
        .article-body code {
            background: var(--border-light);
            padding: 2px 8px;
            border-radius: 4px;
            font-size: 0.9em;
            color: var(--primary);
        }
        .article-footer {
            margin-top: 48px;
            padding-top: 24px;
            border-top: 1px solid var(--border);
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 16px;
        }
        .article-footer .tags {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
        }
        .article-footer .tags .tag {
            display: inline-flex;
            align-items: center;
            gap: 4px;
            padding: 4px 14px;
            background: var(--bg-body);
            color: var(--text-secondary);
            border-radius: 20px;
            font-size: 13px;
            border: 1px solid var(--border);
            transition: all var(--transition);
        }
        .article-footer .tags .tag:hover {
            border-color: var(--accent);
            color: var(--accent-dark);
            background: rgba(232,168,56,0.05);
        }
        .article-footer .back-link {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 10px 20px;
            background: var(--primary);
            color: #fff;
            border-radius: var(--radius-sm);
            font-size: 14px;
            font-weight: 600;
            transition: all var(--transition);
            text-decoration: none;
        }
        .article-footer .back-link:hover {
            background: var(--primary-light);
            transform: translateX(-2px);
            box-shadow: var(--shadow-sm);
        }

        /* ===== Not Found ===== */
        .not-found-box {
            text-align: center;
            padding: 80px 24px;
        }
        .not-found-box .icon {
            font-size: 64px;
            color: var(--border);
            margin-bottom: 24px;
        }
        .not-found-box h2 {
            font-size: 28px;
            color: var(--primary);
            margin-bottom: 12px;
        }
        .not-found-box p {
            color: var(--text-secondary);
            font-size: 16px;
            margin-bottom: 24px;
        }
        .not-found-box .btn-home {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 28px;
            background: var(--accent);
            color: #fff;
            border-radius: var(--radius-sm);
            font-weight: 600;
            font-size: 15px;
            transition: all var(--transition);
            text-decoration: none;
        }
        .not-found-box .btn-home:hover {
            background: var(--accent-dark);
            transform: translateY(-2px);
            box-shadow: var(--shadow-accent);
        }

        /* ===== Footer ===== */
        .app-footer {
            background: var(--primary-dark);
            color: var(--text-sidebar);
            padding: 60px 0 30px;
            margin-top: auto;
        }
        .app-footer .container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }
        .footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1.2fr; gap: 40px; margin-bottom: 40px; }
        .footer-brand .brand-text { font-size: 20px; font-weight: 700; color: #fff; margin-bottom: 12px; display: flex; align-items: center; gap: 8px; }
        .footer-brand .brand-text i { color: var(--accent); }
        .footer-brand p { font-size: 14px; line-height: 1.7; color: var(--text-sidebar); opacity: 0.8; max-width: 360px; }
        .footer-col h4 { font-size: 15px; font-weight: 700; color: #fff; margin-bottom: 16px; letter-spacing: 0.3px; }
        .footer-col a {
            display: block;
            padding: 5px 0;
            font-size: 14px;
            color: var(--text-sidebar);
            text-decoration: none;
            transition: all var(--transition);
            opacity: 0.8;
        }
        .footer-col a:hover { color: var(--accent-light); opacity: 1; padding-left: 4px; }
        .footer-col a i { width: 20px; margin-right: 6px; }
        .footer-bottom {
            border-top: 1px solid rgba(255,255,255,0.06);
            padding-top: 24px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 13px;
            color: var(--text-sidebar);
            opacity: 0.6;
        }
        .footer-social { display: flex; gap: 12px; }
        .footer-social a {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 36px;
            height: 36px;
            border-radius: 50%;
            background: rgba(255,255,255,0.06);
            color: var(--text-sidebar);
            font-size: 16px;
            transition: all var(--transition);
            text-decoration: none;
        }
        .footer-social a:hover {
            background: var(--accent);
            color: #fff;
            transform: translateY(-2px);
        }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
        }
        @media (max-width: 768px) {
            .app-sidebar {
                transform: translateX(-100%);
            }
            .app-sidebar.open {
                transform: translateX(0);
            }
            .sidebar-overlay.open {
                display: block;
            }
            .mobile-toggle {
                display: flex;
                align-items: center;
                justify-content: center;
            }
            .main-wrapper {
                margin-left: 0;
                padding-top: 0;
            }
            .main-content {
                padding: 24px 0 40px;
            }
            .article-detail { padding: 0 16px; }
            .article-header h1 { font-size: 26px; }
            .article-header .excerpt { font-size: 16px; }
            .article-body { font-size: 16px; }
            .footer-grid { grid-template-columns: 1fr; gap: 24px; }
            .footer-bottom { flex-direction: column; text-align: center; }
            .article-footer { flex-direction: column; align-items: flex-start; }
        }
        @media (max-width: 520px) {
            .article-header h1 { font-size: 22px; }
            .article-header .post-meta { gap: 10px; }
            .article-header .breadcrumb { font-size: 13px; }
            .article-body { font-size: 15px; }
            .article-body h2 { font-size: 20px; }
            .article-body h3 { font-size: 18px; }
            .not-found-box { padding: 40px 16px; }
            .not-found-box .icon { font-size: 48px; }
        }

        /* ===== Utility ===== */
        .tag-accent {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 4px 14px;
            background: rgba(232,168,56,0.10);
            color: var(--accent-dark);
            border-radius: 20px;
            font-size: 13px;
            font-weight: 500;
            border: 1px solid rgba(232,168,56,0.15);
        }
        .tag-accent i { font-size: 12px; }