/* roulang page: index */
:root {
            --primary: #2d4b8f;
            --primary-light: #4a6cb5;
            --primary-dark: #1a2f5e;
            --accent: #e6b422;
            --accent-light: #f5d067;
            --accent-dark: #c99515;
            --bg: #f6f8fc;
            --bg-white: #ffffff;
            --bg-soft: #eef1f7;
            --text: #1a2233;
            --text-light: #5b6472;
            --text-muted: #8b94a3;
            --border: #e2e6ee;
            --radius: 16px;
            --radius-sm: 10px;
            --shadow: 0 4px 20px rgba(0, 0, 0, 0.06);
            --shadow-lg: 0 12px 40px rgba(0, 0, 0, 0.10);
            --spacing: 80px;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
            font-size: 16px;
            line-height: 1.7;
            color: var(--text);
            background-color: var(--bg);
            -webkit-font-smoothing: antialiased;
        }

        a {
            color: inherit;
            text-decoration: none;
            transition: color 0.25s;
        }

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

        button,
        input {
            font-family: inherit;
            font-size: inherit;
            border: none;
            outline: none;
        }

        ul,
        ol {
            list-style: none;
        }

        .container {
            width: 100%;
            max-width: 1240px;
            margin: 0 auto;
            padding: 0 24px;
        }

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

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

        /* ===== 导航 ===== */
        .header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: rgba(255, 255, 255, 0.95);
            backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--border);
            box-shadow: 0 1px 8px rgba(0, 0, 0, 0.04);
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 72px;
            gap: 24px;
        }

        .logo {
            display: flex;
            align-items: center;
            gap: 12px;
            font-size: 22px;
            font-weight: 800;
            letter-spacing: 0.5px;
            color: var(--primary);
            white-space: nowrap;
        }

        .logo-icon {
            width: 42px;
            height: 42px;
            border-radius: 12px;
            background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 18px;
            flex-shrink: 0;
            box-shadow: 0 4px 12px rgba(45, 75, 143, 0.35);
        }

        .nav {
            display: flex;
            align-items: center;
            gap: 32px;
        }

        .nav-link {
            font-size: 15px;
            font-weight: 500;
            color: var(--text);
            padding: 8px 2px;
            position: relative;
            transition: color 0.3s;
        }

        .nav-link::after {
            content: "";
            position: absolute;
            left: 0;
            bottom: 0;
            width: 0;
            height: 2px;
            border-radius: 2px;
            background: var(--accent);
            transition: width 0.3s;
        }

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

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

        .nav-link.active {
            color: var(--primary);
            font-weight: 700;
        }

        .header-action {
            display: flex;
            align-items: center;
            gap: 12px;
        }

        .btn-outline-header {
            border: 1.5px solid var(--primary);
            color: var(--primary);
            background: transparent;
            padding: 9px 22px;
            border-radius: 50px;
            font-weight: 600;
            font-size: 14px;
            cursor: pointer;
            transition: all 0.3s;
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }

        .btn-outline-header:hover {
            background: var(--primary);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 6px 18px rgba(45, 75, 143, 0.25);
        }

        .menu-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            padding: 10px;
            cursor: pointer;
            border-radius: 10px;
            background: var(--bg-soft);
            border: none;
        }

        .menu-toggle span {
            width: 22px;
            height: 2.5px;
            border-radius: 2px;
            background: var(--text);
            transition: all 0.3s;
        }

        .mobile-menu {
            display: none;
            padding: 16px 24px 24px;
            background: var(--bg-white);
            border-bottom: 1px solid var(--border);
        }

        .mobile-menu.open {
            display: block;
        }

        .mobile-nav-link {
            display: block;
            padding: 14px 8px;
            font-size: 16px;
            font-weight: 500;
            color: var(--text);
            border-bottom: 1px solid var(--bg-soft);
        }

        .mobile-nav-link.active {
            color: var(--primary);
            font-weight: 700;
        }

        /* ===== Hero ===== */
        .hero {
            position: relative;
            padding: 90px 0 100px;
            background: linear-gradient(135deg, rgba(26, 47, 94, 0.92) 0%, rgba(45, 75, 143, 0.88) 50%, rgba(74, 108, 181, 0.85) 100%), url('/assets/images/backpic/back-1.png') center/cover no-repeat;
            color: #fff;
            overflow: hidden;
        }

        .hero::before {
            content: "";
            position: absolute;
            width: 480px;
            height: 480px;
            background: radial-gradient(circle, rgba(230, 180, 34, 0.15) 0%, transparent 70%);
            top: -120px;
            right: -120px;
            border-radius: 50%;
        }

        .hero-content {
            max-width: 760px;
            position: relative;
            z-index: 2;
        }

        .hero-tag {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(255, 255, 255, 0.14);
            border: 1px solid rgba(255, 255, 255, 0.25);
            color: var(--accent-light);
            font-size: 13px;
            font-weight: 600;
            padding: 6px 16px;
            border-radius: 50px;
            margin-bottom: 24px;
        }

        .hero h1 {
            font-size: 52px;
            font-weight: 900;
            line-height: 1.2;
            letter-spacing: 1px;
            margin-bottom: 20px;
        }

        .hero-desc {
            font-size: 18px;
            line-height: 1.8;
            color: rgba(255, 255, 255, 0.92);
            margin-bottom: 36px;
            max-width: 620px;
        }

        .hero-btns {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
        }

        .btn-primary {
            background: var(--accent);
            color: var(--primary-dark);
            padding: 14px 36px;
            border-radius: 50px;
            font-weight: 700;
            font-size: 16px;
            display: inline-flex;
            align-items: center;
            gap: 10px;
            box-shadow: 0 6px 24px rgba(230, 180, 34, 0.4);
            transition: all 0.3s;
            border: none;
            cursor: pointer;
        }

        .btn-primary:hover {
            background: var(--accent-light);
            transform: translateY(-3px);
            box-shadow: 0 10px 30px rgba(230, 180, 34, 0.55);
        }

        .btn-ghost {
            background: rgba(255, 255, 255, 0.12);
            color: #fff;
            border: 1.5px solid rgba(255, 255, 255, 0.45);
            padding: 14px 36px;
            border-radius: 50px;
            font-weight: 600;
            font-size: 16px;
            display: inline-flex;
            align-items: center;
            gap: 10px;
            cursor: pointer;
            transition: all 0.3s;
        }

        .btn-ghost:hover {
            background: rgba(255, 255, 255, 0.22);
            transform: translateY(-3px);
            border-color: rgba(255, 255, 255, 0.8);
        }

        .hero-stats {
            display: flex;
            gap: 48px;
            margin-top: 56px;
            flex-wrap: wrap;
        }

        .hero-stat {
            border-left: 2px solid rgba(230, 180, 34, 0.5);
            padding-left: 20px;
        }

        .hero-stat b {
            display: block;
            font-size: 28px;
            font-weight: 800;
            color: #fff;
        }

        .hero-stat span {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.75);
        }

        /* ===== 通用板块 ===== */
        .section-header {
            margin-bottom: 44px;
            max-width: 720px;
        }

        .section-header.center {
            margin-left: auto;
            margin-right: auto;
            text-align: center;
        }

        .section-kicker {
            display: inline-block;
            background: rgba(230, 180, 34, 0.12);
            color: var(--accent-dark);
            font-size: 13px;
            font-weight: 700;
            padding: 5px 16px;
            border-radius: 50px;
            letter-spacing: 1px;
            text-transform: uppercase;
            margin-bottom: 14px;
        }

        .section-header h2 {
            font-size: 34px;
            font-weight: 800;
            line-height: 1.3;
            color: var(--text);
            margin-bottom: 14px;
        }

        .section-header p {
            font-size: 16px;
            color: var(--text-light);
            line-height: 1.7;
        }

        /* ===== 特性分类卡片 ===== */
        .feature-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

        .feature-card {
            background: var(--bg-white);
            border-radius: var(--radius);
            padding: 32px 28px;
            border: 1px solid var(--border);
            box-shadow: var(--shadow);
            transition: all 0.3s;
            position: relative;
            overflow: hidden;
        }

        .feature-card::before {
            content: "";
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 3px;
            background: linear-gradient(90deg, var(--primary), var(--accent));
            opacity: 0;
            transition: opacity 0.3s;
        }

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

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

        .feature-icon {
            width: 56px;
            height: 56px;
            border-radius: 14px;
            background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 22px;
            margin-bottom: 20px;
        }

        .feature-card h3 {
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 12px;
        }

        .feature-card p {
            font-size: 14px;
            color: var(--text-light);
            line-height: 1.65;
        }

        /* ===== 分类入口 ===== */
        .category-section {
            background: var(--bg-soft);
        }

        .category-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 28px;
        }

        .category-card {
            display: flex;
            gap: 24px;
            background: var(--bg-white);
            border-radius: var(--radius);
            padding: 28px;
            border: 1px solid var(--border);
            box-shadow: var(--shadow);
            transition: all 0.3s;
        }

        .category-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-lg);
        }

        .category-thumb {
            width: 180px;
            flex-shrink: 0;
        }

        .category-thumb img {
            width: 180px;
            height: 130px;
            object-fit: cover;
            border-radius: 12px;
        }

        .category-info {
            flex: 1;
        }

        .category-info h3 {
            font-size: 20px;
            font-weight: 700;
            margin-bottom: 8px;
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .category-info p {
            font-size: 14px;
            color: var(--text-light);
            line-height: 1.65;
            margin-bottom: 16px;
        }

        .category-meta {
            display: flex;
            gap: 16px;
            font-size: 13px;
            color: var(--text-muted);
        }

        .arrow-link {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            color: var(--primary);
            font-weight: 600;
            font-size: 14px;
        }

        .arrow-link i {
            transition: transform 0.3s;
        }

        .arrow-link:hover i {
            transform: translateX(4px);
        }

        /* ===== 最新信息 ===== */
        .post-card {
            display: flex;
            align-items: center;
            gap: 24px;
            background: var(--bg-white);
            border-radius: var(--radius);
            padding: 24px 28px;
            border: 1px solid var(--border);
            transition: all 0.3s;
            margin-bottom: 16px;
        }

        .post-card:hover {
            box-shadow: var(--shadow-lg);
            transform: translateX(6px);
            border-color: transparent;
        }

        .post-card-icon {
            width: 48px;
            height: 48px;
            border-radius: 12px;
            background: var(--bg-soft);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--primary);
            flex-shrink: 0;
        }

        .post-card-body {
            flex: 1;
            min-width: 0;
        }

        .post-card-body h3 {
            font-size: 17px;
            font-weight: 600;
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
            margin-bottom: 6px;
        }

        .post-card-body p {
            font-size: 14px;
            color: var(--text-light);
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .post-card-meta {
            display: flex;
            align-items: center;
            gap: 14px;
            flex-shrink: 0;
        }

        .badge {
            display: inline-flex;
            align-items: center;
            background: var(--bg-soft);
            color: var(--primary);
            font-size: 13px;
            font-weight: 600;
            padding: 5px 14px;
            border-radius: 50px;
        }

        .text-muted {
            color: var(--text-muted);
            font-size: 13px;
        }

        .empty-state {
            text-align: center;
            padding: 60px 20px;
            background: var(--bg-white);
            border-radius: var(--radius);
            border: 1px dashed var(--border);
        }

        .empty-state i {
            font-size: 44px;
            color: var(--text-muted);
            margin-bottom: 16px;
        }

        .empty-state p {
            font-size: 16px;
            color: var(--text-light);
        }

        /* ===== 数据/流程 ===== */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }

        .stat-block {
            background: var(--bg-white);
            border-radius: var(--radius);
            padding: 32px 24px;
            text-align: center;
            border: 1px solid var(--border);
            transition: all 0.3s;
        }

        .stat-block:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-lg);
        }

        .stat-number {
            font-size: 36px;
            font-weight: 900;
            color: var(--primary);
            background: linear-gradient(135deg, var(--primary), var(--accent-dark));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            display: block;
            margin-bottom: 8px;
        }

        .stat-label {
            font-size: 14px;
            color: var(--text-light);
            font-weight: 500;
        }

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

        .step-item {
            background: var(--bg-white);
            border-radius: var(--radius);
            padding: 36px 28px;
            position: relative;
            border-top: 3px solid var(--border);
            transition: all 0.3s;
        }

        .step-item:hover {
            border-top-color: var(--accent);
            box-shadow: var(--shadow-lg);
            transform: translateY(-4px);
        }

        .step-number {
            width: 44px;
            height: 44px;
            border-radius: 12px;
            background: var(--primary);
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 800;
            font-size: 18px;
            margin-bottom: 18px;
        }

        .step-item h3 {
            font-size: 17px;
            font-weight: 700;
            margin-bottom: 10px;
        }

        .step-item p {
            font-size: 14px;
            color: var(--text-light);
            line-height: 1.65;
        }

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

        .faq-grid {
            max-width: 840px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 14px;
        }

        .faq-item {
            background: var(--bg-white);
            border-radius: var(--radius-sm);
            border: 1px solid var(--border);
            overflow: hidden;
            transition: all 0.3s;
        }

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

        .faq-question {
            padding: 22px 28px;
            font-size: 16px;
            font-weight: 600;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            cursor: pointer;
        }

        .faq-question i {
            color: var(--primary);
            transition: transform 0.3s;
            font-size: 14px;
            flex-shrink: 0;
        }

        .faq-item.active .faq-question i {
            transform: rotate(180deg);
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease;
        }

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

        .faq-answer p {
            padding: 0 28px 22px;
            font-size: 14px;
            color: var(--text-light);
            line-height: 1.7;
        }

        /* ===== CTA ===== */
        .cta-section {
            background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 50%, var(--primary-light) 100%);
            color: #fff;
            text-align: center;
            padding: 80px 0;
            position: relative;
            overflow: hidden;
        }

        .cta-section::before {
            content: "";
            position: absolute;
            width: 300px;
            height: 300px;
            background: rgba(230, 180, 34, 0.1);
            border-radius: 50%;
            bottom: -100px;
            left: -80px;
        }

        .cta-section h2 {
            font-size: 32px;
            font-weight: 800;
            margin-bottom: 14px;
        }

        .cta-section p {
            font-size: 16px;
            opacity: 0.9;
            margin-bottom: 36px;
            max-width: 560px;
            margin-left: auto;
            margin-right: auto;
        }

        .cta-btns {
            display: flex;
            gap: 16px;
            justify-content: center;
            flex-wrap: wrap;
        }

        .btn-white {
            background: #fff;
            color: var(--primary);
            padding: 14px 36px;
            border-radius: 50px;
            font-weight: 700;
            font-size: 16px;
            display: inline-flex;
            align-items: center;
            gap: 10px;
            box-shadow: 0 6px 24px rgba(0, 0, 0, 0.15);
            transition: all 0.3s;
        }

        .btn-white:hover {
            transform: translateY(-3px);
            box-shadow: 0 12px 36px rgba(0, 0, 0, 0.25);
        }

        .btn-outline-white {
            border: 2px solid rgba(255, 255, 255, 0.6);
            color: #fff;
            padding: 14px 36px;
            border-radius: 50px;
            font-weight: 600;
            font-size: 16px;
            display: inline-flex;
            align-items: center;
            gap: 10px;
            transition: all 0.3s;
        }

        .btn-outline-white:hover {
            background: rgba(255, 255, 255, 0.15);
            border-color: #fff;
            transform: translateY(-3px);
        }

        /* ===== 页脚 ===== */
        .footer {
            background: var(--primary-dark);
            color: rgba(255, 255, 255, 0.75);
            padding: 48px 0 24px;
        }

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

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

        .footer-brand .logo-icon {
            background: var(--accent);
            color: var(--primary-dark);
        }

        .footer-brand p {
            font-size: 14px;
            line-height: 1.7;
            margin-top: 14px;
            max-width: 320px;
        }

        .footer-heading {
            color: #fff;
            font-size: 16px;
            font-weight: 700;
            margin-bottom: 18px;
        }

        .footer-links li {
            margin-bottom: 10px;
        }

        .footer-links a {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.65);
            transition: all 0.25s;
        }

        .footer-links a:hover {
            color: var(--accent);
            padding-left: 6px;
        }

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.12);
            padding-top: 20px;
            text-align: center;
            font-size: 13px;
            color: rgba(255, 255, 255, 0.45);
        }

        /* ===== 响应式 ===== */
        @media (max-width: 1024px) {
            .hero h1 {
                font-size: 42px;
            }

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

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

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

        @media (max-width: 768px) {
            .section {
                padding: 48px 0;
            }

            .nav {
                display: none;
            }

            .header-action .btn-outline-header {
                display: none;
            }

            .menu-toggle {
                display: flex;
            }

            .hero {
                padding: 60px 0 70px;
            }

            .hero h1 {
                font-size: 34px;
            }

            .hero-desc {
                font-size: 16px;
            }

            .hero-stats {
                gap: 24px;
                margin-top: 40px;
            }

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

            .category-card {
                flex-direction: column;
            }

            .category-thumb {
                width: 100%;
            }

            .category-thumb img {
                width: 100%;
                height: 180px;
            }

            .post-card {
                flex-direction: column;
                align-items: flex-start;
                gap: 14px;
            }

            .post-card-body h3 {
                white-space: normal;
            }

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

        @media (max-width: 520px) {
            .container {
                padding: 0 18px;
            }

            .hero h1 {
                font-size: 28px;
            }

            .hero-btns .btn-primary,
            .hero-btns .btn-ghost {
                width: 100%;
                justify-content: center;
            }

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

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

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

            .section-header h2 {
                font-size: 24px;
            }

            .cta-section h2 {
                font-size: 24px;
            }

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

        /* 焦点可见性 */
        a:focus-visible,
        button:focus-visible {
            outline: 3px solid var(--accent);
            outline-offset: 2px;
        }

/* roulang page: category1 */
:root {
            --primary: #1a2a4a;
            --primary-light: #2d4373;
            --accent: #d4a843;
            --accent-hover: #c09530;
            --accent-soft: #faf3e0;
            --bg: #f5f7fb;
            --bg-alt: #eef1f7;
            --white: #ffffff;
            --text: #1e2430;
            --text-weak: #5b6472;
            --border: #e3e8f0;
            --radius: 16px;
            --radius-sm: 10px;
            --shadow: 0 8px 30px rgba(26, 42, 74, 0.08);
            --shadow-hover: 0 14px 40px rgba(26, 42, 74, 0.14);
            --space: 24px;
            --space-lg: 48px;
            --space-xl: 80px;
            --header-height: 72px;
            --transition: all 0.3s ease;
        }

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

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

        body {
            font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
            font-size: 16px;
            line-height: 1.75;
            color: var(--text);
            background-color: var(--bg);
            -webkit-font-smoothing: antialiased;
        }

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

        a {
            color: inherit;
            text-decoration: none;
        }

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

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

        /* ===== Header / Nav ===== */
        .header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--border);
        }

        .nav {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 var(--space);
            height: var(--header-height);
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
        }

        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.25rem;
            font-weight: 700;
            color: var(--primary);
            letter-spacing: 0.02em;
            flex-shrink: 0;
        }

        .logo-icon {
            width: 36px;
            height: 36px;
            display: flex;
            align-items: center;
            justify-content: center;
            background: var(--primary);
            color: var(--accent);
            border-radius: 10px;
            font-size: 16px;
        }

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

        .nav-link {
            display: inline-block;
            padding: 10px 20px;
            border-radius: 8px;
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--text-weak);
            transition: var(--transition);
            position: relative;
        }

        .nav-link:hover {
            color: var(--primary);
            background: var(--accent-soft);
        }

        .nav-link.active {
            color: var(--primary);
            font-weight: 700;
            background: var(--accent-soft);
        }

        .nav-link.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 20px;
            right: 20px;
            height: 3px;
            background: var(--accent);
            border-radius: 3px;
        }

        .nav-cta {
            display: inline-block;
            padding: 10px 24px;
            background: var(--primary);
            color: var(--white);
            border-radius: 8px;
            font-size: 0.9rem;
            font-weight: 600;
            transition: var(--transition);
            margin-left: 12px;
        }

        .nav-cta:hover {
            background: var(--primary-light);
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(26, 42, 74, 0.25);
        }

        .nav-toggle {
            display: none;
            font-size: 22px;
            color: var(--primary);
            background: none;
            border: 1px solid var(--border);
            border-radius: 8px;
            padding: 6px 12px;
            transition: var(--transition);
        }

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

        @media (max-width: 768px) {
            .nav-toggle {
                display: block;
            }
            .nav-links {
                display: none;
                position: absolute;
                top: var(--header-height);
                left: 0;
                right: 0;
                background: var(--white);
                flex-direction: column;
                align-items: stretch;
                padding: 12px 16px 20px;
                box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
                border-bottom: 1px solid var(--border);
                gap: 8px;
            }
            .nav-links.open {
                display: flex;
            }
            .nav-link {
                padding: 14px 16px;
                border-radius: 10px;
                text-align: center;
            }
            .nav-cta {
                text-align: center;
                margin-left: 0;
            }
        }

        /* ===== Page Banner (Hero) ===== */
        .page-banner {
            position: relative;
            padding: 90px 0 80px;
            background: linear-gradient(135deg, rgba(26, 42, 74, 0.92), rgba(26, 42, 74, 0.75)), url('/assets/images/backpic/back-1.png') center/cover no-repeat;
            color: var(--white);
            text-align: center;
        }

        .page-banner::before {
            content: '';
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at 30% 20%, rgba(212, 168, 67, 0.12), transparent 60%);
        }

        .page-banner .container {
            position: relative;
            z-index: 2;
        }

        .page-banner .banner-tag {
            display: inline-block;
            padding: 6px 18px;
            background: rgba(212, 168, 67, 0.2);
            border: 1px solid rgba(212, 168, 67, 0.4);
            border-radius: 50px;
            font-size: 0.85rem;
            font-weight: 600;
            color: var(--accent);
            letter-spacing: 0.05em;
            margin-bottom: 20px;
        }

        .page-banner h1 {
            font-size: clamp(2rem, 5vw, 3rem);
            font-weight: 800;
            line-height: 1.25;
            margin-bottom: 16px;
            letter-spacing: 0.02em;
        }

        .page-banner p {
            max-width: 680px;
            margin: 0 auto;
            font-size: 1.05rem;
            line-height: 1.8;
            color: rgba(255, 255, 255, 0.85);
        }

        .breadcrumb {
            margin-top: 28px;
            display: flex;
            justify-content: center;
            gap: 10px;
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.6);
        }

        .breadcrumb a {
            color: rgba(255, 255, 255, 0.8);
            transition: var(--transition);
        }

        .breadcrumb a:hover {
            color: var(--accent);
        }

        @media (max-width: 768px) {
            .page-banner {
                padding: 56px 0 48px;
            }
            .breadcrumb {
                flex-wrap: wrap;
            }
        }

        /* ===== Sections ===== */
        .section {
            padding: var(--space-xl) 0;
        }

        .section-alt {
            background: var(--bg-alt);
        }

        .section-header {
            text-align: center;
            max-width: 700px;
            margin: 0 auto 48px;
        }

        .section-header .section-tag {
            display: inline-block;
            padding: 4px 14px;
            background: var(--accent-soft);
            border-radius: 50px;
            font-size: 0.8rem;
            font-weight: 700;
            color: var(--accent-hover);
            letter-spacing: 0.06em;
            margin-bottom: 14px;
        }

        .section-header h2 {
            font-size: clamp(1.6rem, 3vw, 2.2rem);
            font-weight: 800;
            color: var(--primary);
            line-height: 1.3;
            margin-bottom: 12px;
        }

        .section-header p {
            color: var(--text-weak);
            font-size: 1rem;
            line-height: 1.8;
        }

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

        .guide-card {
            background: var(--white);
            border-radius: var(--radius);
            padding: 32px 28px;
            box-shadow: var(--shadow);
            border: 1px solid var(--border);
            transition: var(--transition);
            position: relative;
            overflow: hidden;
        }

        .guide-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 4px;
            background: var(--accent);
            opacity: 0;
            transition: var(--transition);
        }

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

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

        .guide-icon {
            width: 56px;
            height: 56px;
            background: var(--accent-soft);
            border-radius: 14px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 22px;
            color: var(--accent-hover);
            margin-bottom: 20px;
        }

        .guide-card h3 {
            font-size: 1.15rem;
            font-weight: 700;
            color: var(--primary);
            margin-bottom: 10px;
        }

        .guide-card p {
            font-size: 0.92rem;
            color: var(--text-weak);
            line-height: 1.75;
        }

        @media (max-width: 992px) {
            .guide-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }

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

        /* ===== Steps ===== */
        .steps-wrap {
            max-width: 900px;
            margin: 0 auto;
        }

        .step-item {
            display: flex;
            gap: 24px;
            padding: 28px 0;
            border-bottom: 1px solid var(--border);
            position: relative;
        }

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

        .step-num {
            flex-shrink: 0;
            width: 52px;
            height: 52px;
            border-radius: 50%;
            background: var(--primary);
            color: var(--accent);
            font-size: 1.2rem;
            font-weight: 800;
            display: flex;
            align-items: center;
            justify-content: center;
            box-shadow: 0 6px 20px rgba(26, 42, 74, 0.2);
        }

        .step-content h3 {
            font-size: 1.1rem;
            font-weight: 700;
            color: var(--primary);
            margin-bottom: 8px;
        }

        .step-content p {
            font-size: 0.95rem;
            color: var(--text-weak);
            line-height: 1.75;
            max-width: 680px;
        }

        @media (max-width: 640px) {
            .step-item {
                flex-direction: column;
                gap: 12px;
            }
            .step-num {
                width: 44px;
                height: 44px;
                font-size: 1rem;
            }
        }

        /* ===== Topic Cards ===== */
        .topic-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 28px;
        }

        .topic-card {
            display: flex;
            gap: 20px;
            background: var(--white);
            border-radius: var(--radius);
            padding: 24px;
            box-shadow: var(--shadow);
            border: 1px solid var(--border);
            transition: var(--transition);
        }

        .topic-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
        }

        .topic-img {
            width: 120px;
            height: 96px;
            border-radius: 12px;
            overflow: hidden;
            flex-shrink: 0;
            background: var(--bg-alt);
        }

        .topic-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s ease;
        }

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

        .topic-info {
            flex: 1;
        }

        .topic-info h3 {
            font-size: 1.05rem;
            font-weight: 700;
            color: var(--primary);
            margin-bottom: 6px;
            line-height: 1.4;
        }

        .topic-info p {
            font-size: 0.88rem;
            color: var(--text-weak);
            line-height: 1.7;
            display: -webkit-box;
            -webkit-line-clamp: 3;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .topic-meta {
            margin-top: 10px;
            display: flex;
            align-items: center;
            gap: 14px;
            font-size: 0.8rem;
            color: var(--text-weak);
        }

        .topic-meta i {
            color: var(--accent-hover);
        }

        @media (max-width: 992px) {
            .topic-grid {
                grid-template-columns: 1fr;
            }
        }

        @media (max-width: 520px) {
            .topic-card {
                flex-direction: column;
            }
            .topic-img {
                width: 100%;
                height: 160px;
            }
        }

        /* ===== Data / Stats ===== */
        .stats-band {
            background: var(--primary);
            border-radius: var(--radius);
            padding: 48px 40px;
            margin: 0 auto;
            max-width: 1100px;
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 40px;
            text-align: center;
            position: relative;
            overflow: hidden;
        }

        .stats-band::before {
            content: '';
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at 80% 20%, rgba(212, 168, 67, 0.18), transparent 60%);
            pointer-events: none;
        }

        .stat-item {
            position: relative;
            z-index: 2;
        }

        .stat-num {
            font-size: 2.6rem;
            font-weight: 800;
            color: var(--accent);
            line-height: 1.2;
            margin-bottom: 6px;
        }

        .stat-label {
            font-size: 0.9rem;
            color: rgba(255, 255, 255, 0.8);
            letter-spacing: 0.04em;
        }

        @media (max-width: 768px) {
            .stats-band {
                grid-template-columns: 1fr;
                padding: 36px 24px;
                gap: 24px;
            }
            .stat-num {
                font-size: 2rem;
            }
        }

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

        .faq-item {
            background: var(--white);
            border-radius: var(--radius-sm);
            border: 1px solid var(--border);
            margin-bottom: 14px;
            overflow: hidden;
            transition: var(--transition);
        }

        .faq-item:hover {
            border-color: rgba(212, 168, 67, 0.4);
            box-shadow: 0 4px 16px rgba(26, 42, 74, 0.06);
        }

        .faq-question {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 20px 22px;
            cursor: pointer;
            font-weight: 700;
            font-size: 0.98rem;
            color: var(--primary);
            gap: 16px;
        }

        .faq-question i {
            color: var(--accent-hover);
            font-size: 14px;
            transition: transform 0.3s ease;
            flex-shrink: 0;
        }

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

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease;
            background: var(--bg);
        }

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

        /* ===== CTA ===== */
        .cta-section {
            background: var(--white);
            border-radius: var(--radius);
            padding: 56px 48px;
            text-align: center;
            position: relative;
            overflow: hidden;
            border: 1px solid var(--border);
        }

        .cta-section::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 6px;
            background: linear-gradient(90deg, var(--primary), var(--accent));
        }

        .cta-section h2 {
            font-size: clamp(1.5rem, 3vw, 2rem);
            font-weight: 800;
            color: var(--primary);
            margin-bottom: 14px;
        }

        .cta-section p {
            color: var(--text-weak);
            max-width: 560px;
            margin: 0 auto 28px;
            font-size: 0.98rem;
        }

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

        .btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 14px 32px;
            border-radius: 10px;
            font-weight: 600;
            font-size: 0.95rem;
            transition: var(--transition);
        }

        .btn-primary {
            background: var(--primary);
            color: var(--white);
            box-shadow: 0 4px 16px rgba(26, 42, 74, 0.25);
        }

        .btn-primary:hover {
            background: var(--primary-light);
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(26, 42, 74, 0.3);
        }

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

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

        @media (max-width: 640px) {
            .cta-section {
                padding: 40px 24px;
            }
            .btn {
                width: 100%;
                justify-content: center;
            }
        }

        /* ===== Footer ===== */
        .footer {
            background: var(--primary);
            color: rgba(255, 255, 255, 0.85);
            padding: 60px 0 0;
            margin-top: var(--space-xl);
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.6fr 1fr 1fr 1fr;
            gap: 40px;
            padding-bottom: 40px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.1);
        }

        .footer-brand .logo {
            color: var(--white);
            margin-bottom: 14px;
        }

        .footer-brand .logo-icon {
            background: var(--accent);
            color: var(--primary);
        }

        .footer-brand p {
            font-size: 0.88rem;
            line-height: 1.8;
            color: rgba(255, 255, 255, 0.65);
            max-width: 280px;
        }

        .footer-heading {
            font-size: 1rem;
            font-weight: 700;
            color: var(--white);
            margin-bottom: 16px;
            letter-spacing: 0.04em;
        }

        .footer-links {
            list-style: none;
        }

        .footer-links li {
            margin-bottom: 10px;
        }

        .footer-links a {
            font-size: 0.88rem;
            color: rgba(255, 255, 255, 0.6);
            transition: var(--transition);
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }

        .footer-links a:hover {
            color: var(--accent);
            transform: translateX(4px);
        }

        .footer-bottom {
            padding: 24px 0;
            text-align: center;
            font-size: 0.82rem;
            color: rgba(255, 255, 255, 0.4);
            border-top: 1px solid rgba(255, 255, 255, 0.08);
        }

        @media (max-width: 992px) {
            .footer-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        @media (max-width: 560px) {
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }
        }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .container {
                padding: 0 20px;
            }
            .section {
                padding: 56px 0;
            }
        }

        @media (max-width: 768px) {
            .section {
                padding: 44px 0;
            }
            .section-header {
                margin-bottom: 32px;
            }
        }

/* roulang page: article */
:root {
  --primary: #0f1c2e;
  --primary-light: #1b2c45;
  --accent: #c9a35c;
  --accent-dark: #b08b3f;
  --text: #1f2937;
  --text-weak: #6b7280;
  --bg: #ffffff;
  --bg-soft: #f7f8fa;
  --border: #e5e7eb;
  --radius: 14px;
  --radius-sm: 8px;
  --shadow: 0 10px 30px rgba(15, 28, 46, .08);
  --shadow-lg: 0 18px 40px rgba(15, 28, 46, .12);
  --transition: .25s ease;
}
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body { font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif; background: var(--bg-soft); color: var(--text); line-height: 1.75; -webkit-font-smoothing: antialiased; }
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; transition: color var(--transition); }
ul, ol { list-style: none; }
button { font-family: inherit; cursor: pointer; }
.container { width: 100%; max-width: 1200px; margin: 0 auto; padding: 0 24px; }
.header { background: rgba(255,255,255,.94); backdrop-filter: blur(12px); position: sticky; top: 0; z-index: 100; border-bottom: 1px solid var(--border); }
.header-inner { display: flex; align-items: center; justify-content: space-between; height: 74px; gap: 16px; }
.logo { display: flex; align-items: center; gap: 10px; font-size: 21px; font-weight: 800; color: var(--primary); letter-spacing: .5px; }
.logo-icon { width: 40px; height: 40px; border-radius: 12px; background: linear-gradient(135deg, var(--primary), var(--primary-light)); color: var(--accent); display: flex; align-items: center; justify-content: center; font-size: 18px; box-shadow: 0 4px 12px rgba(15,28,46,.2); }
.nav { display: flex; align-items: center; gap: 6px; }
.nav-link { padding: 8px 18px; border-radius: 999px; color: var(--text); font-weight: 500; font-size: 15px; transition: all var(--transition); }
.nav-link:hover { background: var(--bg-soft); color: var(--primary); }
.nav-link.active { background: var(--primary); color: #fff; box-shadow: 0 4px 14px rgba(15,28,46,.22); }
.nav-toggle { display: none; background: none; border: none; font-size: 22px; color: var(--primary); width: 42px; height: 42px; border-radius: 10px; align-items: center; justify-content: center; transition: background var(--transition); }
.nav-toggle:hover { background: var(--bg-soft); }
.article-hero { position: relative; padding: 68px 0 62px; background-size: cover; background-position: center; color: #fff; }
.article-hero::before { content: ""; position: absolute; inset: 0; background: linear-gradient(180deg, rgba(15,28,46,.82), rgba(15,28,46,.94)); }
.article-hero .container { position: relative; z-index: 2; }
.hero-overline { display: inline-flex; align-items: center; gap: 8px; font-size: 14px; letter-spacing: 1px; color: rgba(255,255,255,.82); text-transform: uppercase; margin-bottom: 18px; }
.hero-overline i { color: var(--accent); }
.article-meta-top { margin-bottom: 16px; }
.badge { display: inline-flex; align-items: center; gap: 6px; background: rgba(201,163,92,.18); border: 1px solid rgba(201,163,92,.5); color: #f0d9a8; padding: 5px 14px; border-radius: 999px; font-size: 13px; font-weight: 600; letter-spacing: .5px; }
.article-hero h1 { font-size: 36px; line-height: 1.35; font-weight: 800; letter-spacing: .5px; margin-bottom: 16px; max-width: 800px; }
.article-meta { display: flex; flex-wrap: wrap; gap: 18px; color: rgba(255,255,255,.78); font-size: 14px; }
.article-meta span { display: inline-flex; align-items: center; gap: 7px; }
.article-meta i { color: var(--accent); }
.article-section { padding: 52px 0 60px; }
.article-layout { display: grid; grid-template-columns: minmax(0, 1fr) 320px; gap: 36px; align-items: start; }
.article-main { background: var(--bg); border-radius: var(--radius); padding: 40px 44px; box-shadow: var(--shadow-lg); border: 1px solid var(--border); }
.article-content { font-size: 16px; line-height: 1.9; color: var(--text); overflow-wrap: break-word; }
.article-content h2 { font-size: 26px; margin: 34px 0 18px; padding-left: 14px; border-left: 4px solid var(--accent); font-weight: 700; line-height: 1.4; }
.article-content h3 { font-size: 21px; margin: 28px 0 14px; font-weight: 700; line-height: 1.45; }
.article-content h4 { font-size: 18px; margin: 22px 0 12px; font-weight: 700; }
.article-content p { margin: 0 0 18px; }
.article-content ul, .article-content ol { margin: 0 0 20px; padding-left: 24px; }
.article-content ul li, .article-content ol li { margin-bottom: 8px; position: relative; }
.article-content ul li::before { content: ""; position: absolute; left: -16px; top: 12px; width: 6px; height: 6px; border-radius: 50%; background: var(--accent); }
.article-content ol { list-style: decimal; }
.article-content ol li::before { display: none; }
.article-content blockquote { border-left: 4px solid var(--accent); background: #faf8f4; padding: 16px 22px; border-radius: 0 10px 10px 0; margin: 24px 0; color: var(--text-weak); font-style: italic; }
.article-content img { max-width: 100%; border-radius: 12px; margin: 20px 0; box-shadow: var(--shadow); }
.article-content a { color: var(--accent-dark); text-decoration: underline; text-underline-offset: 3px; }
.article-content a:hover { color: var(--primary); }
.article-content table { width: 100%; border-collapse: collapse; margin: 22px 0; font-size: 15px; }
.article-content th, .article-content td { border: 1px solid var(--border); padding: 10px 14px; text-align: left; }
.article-content th { background: var(--bg-soft); font-weight: 700; }
.article-content code { background: var(--bg-soft); padding: 2px 8px; border-radius: 6px; font-size: 14px; color: var(--primary); }
.article-footer-meta { margin-top: 36px; padding-top: 24px; border-top: 1px solid var(--border); }
.article-tags { display: flex; flex-wrap: wrap; gap: 10px; }
.tag { display: inline-flex; align-items: center; gap: 6px; background: var(--bg-soft); border: 1px solid var(--border); color: var(--text-weak); padding: 5px 14px; border-radius: 999px; font-size: 13px; font-weight: 500; transition: all var(--transition); }
.tag:hover { border-color: var(--accent); color: var(--primary); background: #faf8f4; }
.not-found-full { background: var(--bg); border-radius: var(--radius); padding: 64px 48px; text-align: center; box-shadow: var(--shadow-lg); border: 1px solid var(--border); max-width: 720px; margin: 0 auto; }
.not-found-icon { width: 76px; height: 76px; border-radius: 50%; background: var(--bg-soft); margin: 0 auto 20px; display: flex; align-items: center; justify-content: center; font-size: 30px; color: var(--accent); }
.not-found-full h2 { font-size: 28px; color: var(--primary); margin-bottom: 12px; }
.not-found-full p { color: var(--text-weak); margin-bottom: 28px; max-width: 420px; margin-left: auto; margin-right: auto; }
.not-found-full .btn { display: inline-flex; }
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 8px; padding: 12px 26px; border-radius: 999px; font-size: 15px; font-weight: 600; border: none; transition: all var(--transition); text-decoration: none; }
.btn-primary { background: var(--primary); color: #fff; box-shadow: 0 6px 16px rgba(15,28,46,.18); }
.btn-primary:hover { background: var(--primary-light); transform: translateY(-2px); box-shadow: 0 10px 24px rgba(15,28,46,.24); }
.btn-accent { background: var(--accent); color: var(--primary); box-shadow: 0 6px 16px rgba(201,163,92,.3); }
.btn-accent:hover { background: #d4b274; transform: translateY(-2px); box-shadow: 0 10px 24px rgba(201,163,92,.38); color: var(--primary); }
.btn-outline { background: transparent; border: 2px solid var(--border); color: var(--text); }
.btn-outline:hover { border-color: var(--accent); color: var(--primary); background: var(--bg-soft); }
.article-sidebar { display: grid; gap: 22px; position: sticky; top: 96px; }
.sidebar-card { background: var(--bg); border-radius: var(--radius); padding: 26px 24px; border: 1px solid var(--border); box-shadow: var(--shadow); }
.sidebar-card h3 { font-size: 17px; font-weight: 700; color: var(--primary); margin-bottom: 16px; display: flex; align-items: center; gap: 10px; }
.sidebar-card h3 i { color: var(--accent); font-size: 16px; }
.sidebar-nav { display: grid; gap: 8px; }
.sidebar-nav li a { display: flex; align-items: center; gap: 10px; padding: 10px 14px; border-radius: 10px; background: var(--bg-soft); color: var(--text); font-size: 14px; font-weight: 500; transition: all var(--transition); }
.sidebar-nav li a:hover, .sidebar-nav li a:focus { background: var(--primary); color: #fff; transform: translateX(3px); }
.sidebar-nav li a i { color: var(--accent); width: 18px; text-align: center; }
.sidebar-cover { border-radius: 10px; overflow: hidden; margin-bottom: 14px; }
.sidebar-cover img { width: 100%; height: 140px; object-fit: cover; }
.sidebar-card p { font-size: 14px; color: var(--text-weak); line-height: 1.8; }
.tag-cloud { display: flex; flex-wrap: wrap; gap: 8px; }
.explore-section { padding: 60px 0 16px; }
.section-head { text-align: center; max-width: 640px; margin: 0 auto 40px; }
.section-head .overline { display: inline-flex; align-items: center; gap: 8px; color: var(--accent-dark); font-size: 14px; font-weight: 600; letter-spacing: 1px; text-transform: uppercase; margin-bottom: 12px; }
.section-head h2 { font-size: 32px; color: var(--primary); font-weight: 800; line-height: 1.35; }
.section-head p { color: var(--text-weak); margin-top: 12px; font-size: 16px; }
.explore-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.explore-card { background: var(--bg); border-radius: var(--radius); overflow: hidden; border: 1px solid var(--border); box-shadow: var(--shadow); transition: all var(--transition); display: block; }
.explore-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); }
.explore-card .card-cover { height: 180px; overflow: hidden; position: relative; }
.explore-card .card-cover img { width: 100%; height: 100%; object-fit: cover; transition: transform .5s ease; }
.explore-card:hover .card-cover img { transform: scale(1.06); }
.explore-card .card-cover::after { content: ""; position: absolute; inset: 0; background: linear-gradient(180deg, transparent 45%, rgba(15,28,46,.55)); }
.explore-card .card-body { padding: 22px 24px 26px; }
.explore-card .card-body h3 { font-size: 18px; font-weight: 700; color: var(--primary); margin-bottom: 10px; display: flex; align-items: center; gap: 8px; }
.explore-card .card-body h3 i { color: var(--accent); font-size: 17px; }
.explore-card .card-body p { color: var(--text-weak); font-size: 14px; line-height: 1.8; }
.faq-section { padding: 60px 0 20px; }
.faq-list { max-width: 760px; margin: 0 auto; }
.faq-item { background: var(--bg); border: 1px solid var(--border); border-radius: var(--radius); margin-bottom: 14px; box-shadow: var(--shadow); overflow: hidden; transition: box-shadow var(--transition); }
.faq-item:hover { box-shadow: var(--shadow-lg); }
.faq-item summary { cursor: pointer; padding: 20px 24px; font-weight: 600; font-size: 16px; color: var(--primary); list-style: none; display: flex; justify-content: space-between; align-items: center; gap: 16px; }
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after { content: "\f078"; font-family: "Font Awesome 6 Free"; font-weight: 900; font-size: 14px; color: var(--accent); transition: transform var(--transition); flex-shrink: 0; }
.faq-item[open] summary::after { transform: rotate(180deg); }
.faq-item .faq-answer { padding: 0 24px 22px; color: var(--text-weak); line-height: 1.85; font-size: 15px; border-top: 1px solid var(--border); margin-top: 0; }
.faq-item[open] .faq-answer { padding-top: 16px; }
.cta-section { padding: 60px 0 70px; }
.cta-box { background: linear-gradient(120deg, var(--primary), var(--primary-light)); border-radius: 24px; padding: 48px 52px; display: flex; align-items: center; justify-content: space-between; gap: 32px; position: relative; overflow: hidden; box-shadow: 0 20px 44px rgba(15,28,46,.28); }
.cta-box::before { content: ""; position: absolute; right: -60px; top: -60px; width: 200px; height: 200px; border-radius: 50%; background: rgba(201,163,92,.14); }
.cta-box h2 { color: #fff; font-size: 28px; font-weight: 800; margin-bottom: 10px; }
.cta-box p { color: rgba(255,255,255,.8); font-size: 15px; }
.cta-box .btn { position: relative; z-index: 2; flex-shrink: 0; }
.footer { background: var(--primary); color: rgba(255,255,255,.75); padding: 64px 0 30px; }
.footer-grid { display: grid; grid-template-columns: 1.5fr 1fr 1fr 1fr; gap: 40px; margin-bottom: 40px; }
.footer-brand .logo { color: #fff; margin-bottom: 16px; }
.footer-brand p { font-size: 14px; line-height: 1.8; max-width: 280px; }
.footer-heading { color: #fff; font-size: 16px; font-weight: 700; margin-bottom: 16px; position: relative; padding-bottom: 10px; }
.footer-heading::after { content: ""; position: absolute; left: 0; bottom: 0; width: 28px; height: 2px; background: var(--accent); border-radius: 2px; }
.footer-links { display: grid; gap: 10px; }
.footer-links a { font-size: 14px; color: rgba(255,255,255,.68); transition: all var(--transition); display: inline-flex; align-items: center; gap: 8px; }
.footer-links a:hover { color: var(--accent); padding-left: 4px; }
.footer-bottom { border-top: 1px solid rgba(255,255,255,.12); padding-top: 24px; text-align: center; font-size: 14px; color: rgba(255,255,255,.5); }
@media (max-width: 1024px) {
  .article-layout { grid-template-columns: 1fr; }
  .article-sidebar { position: static; grid-template-columns: repeat(2, 1fr); }
  .explore-grid { grid-template-columns: repeat(2, 1fr); }
  .cta-box { flex-direction: column; text-align: center; align-items: flex-start; }
}
@media (max-width: 768px) {
  .header-inner { height: 66px; }
  .nav { display: none; position: absolute; top: 66px; left: 0; right: 0; background: #fff; border-bottom: 1px solid var(--border); box-shadow: 0 18px 30px rgba(15,28,46,.1); padding: 16px 24px; flex-direction: column; align-items: stretch; gap: 8px; }
  .nav.open { display: flex; }
  .nav-link { padding: 13px 18px; border-radius: 12px; text-align: center; }
  .nav-toggle { display: flex; }
  .article-hero { padding: 50px 0 46px; }
  .article-hero h1 { font-size: 28px; }
  .article-main { padding: 28px 22px; }
  .article-content { font-size: 15px; }
  .article-content h2 { font-size: 22px; }
  .article-content h3 { font-size: 18px; }
  .explore-grid { grid-template-columns: 1fr; }
  .explore-card .card-cover { height: 160px; }
  .section-head h2 { font-size: 25px; }
  .cta-box { padding: 36px 28px; }
  .cta-box h2 { font-size: 23px; }
  .footer-grid { grid-template-columns: repeat(2, 1fr); gap: 30px; }
  .article-sidebar { grid-template-columns: 1fr; }
  .not-found-full { padding: 44px 24px; }
}
@media (max-width: 520px) {
  .container { padding: 0 18px; }
  .footer-grid { grid-template-columns: 1fr; gap: 26px; }
  .article-hero { padding: 42px 0 40px; }
  .article-hero h1 { font-size: 24px; }
  .article-meta { gap: 10px; font-size: 13px; flex-direction: column; }
  .article-main { padding: 22px 18px; }
  .explore-card .card-cover { height: 140px; }
  .section-head h2 { font-size: 22px; }
  .faq-item summary { font-size: 15px; padding: 16px 18px; }
  .faq-item .faq-answer { font-size: 14px; padding: 0 18px 18px; }
  .cta-box { padding: 30px 20px; }
  .cta-box h2 { font-size: 21px; }
  .btn { width: 100%; }
  .cta-box .btn { width: 100%; }
  .not-found-full { padding: 36px 20px; }
}