/* roulang page: index */
:root {
            --primary: #1a56db;
            --primary-light: #3b82f6;
            --primary-dark: #1e40af;
            --secondary: #0ea5e9;
            --accent: #f59e0b;
            --bg-body: #f8fafc;
            --bg-card: #ffffff;
            --text-main: #0f172a;
            --text-muted: #64748b;
            --text-light: #94a3b8;
            --border-color: #e2e8f0;
            --radius: 12px;
            --radius-sm: 8px;
            --shadow-sm: 0 1px 3px rgba(0,0,0,0.06);
            --shadow: 0 4px 20px rgba(0,0,0,0.08);
            --shadow-lg: 0 12px 40px rgba(0,0,0,0.12);
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font-sans: 'Inter', system-ui, -apple-system, 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
        }
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: var(--font-sans);
            background-color: var(--bg-body);
            color: var(--text-main);
            line-height: 1.7;
            -webkit-font-smoothing: antialiased;
        }
        a {
            color: inherit;
            text-decoration: none;
            transition: var(--transition);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        button, input, textarea {
            font-family: inherit;
            font-size: inherit;
            outline: none;
            border: none;
        }
        button {
            cursor: pointer;
            transition: var(--transition);
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
        }
        @media (max-width: 768px) {
            .container {
                padding: 0 16px;
            }
        }

        /* ===== Header / Nav ===== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: rgba(255,255,255,0.96);
            backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--border-color);
            box-shadow: 0 1px 4px rgba(0,0,0,0.04);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 72px;
        }
        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-weight: 800;
            font-size: 1.5rem;
            color: var(--primary);
            letter-spacing: -0.5px;
        }
        .logo i {
            font-size: 1.6rem;
            color: var(--primary-light);
        }
        .logo span {
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .nav-list {
            display: flex;
            align-items: center;
            gap: 8px;
            list-style: none;
        }
        .nav-list a {
            display: block;
            padding: 8px 20px;
            border-radius: 40px;
            font-weight: 500;
            font-size: 0.95rem;
            color: var(--text-muted);
            transition: var(--transition);
        }
        .nav-list a:hover {
            color: var(--primary);
            background: rgba(26,86,219,0.08);
        }
        .nav-list a.active {
            color: #fff;
            background: var(--primary);
            box-shadow: 0 4px 12px rgba(26,86,219,0.3);
        }
        .header-actions {
            display: flex;
            align-items: center;
            gap: 12px;
        }
        .search-box {
            display: flex;
            align-items: center;
            background: var(--bg-body);
            border: 1px solid var(--border-color);
            border-radius: 40px;
            padding: 0 16px;
            transition: var(--transition);
        }
        .search-box:focus-within {
            border-color: var(--primary-light);
            box-shadow: 0 0 0 3px rgba(59,130,246,0.15);
        }
        .search-box input {
            background: transparent;
            padding: 8px 6px;
            width: 140px;
            font-size: 0.9rem;
            color: var(--text-main);
        }
        .search-box input::placeholder {
            color: var(--text-light);
        }
        .search-box button {
            background: transparent;
            color: var(--text-muted);
            padding: 6px;
            font-size: 1rem;
        }
        .header-cta {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 10px 24px;
            border-radius: 40px;
            font-weight: 600;
            font-size: 0.95rem;
            color: #fff;
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            box-shadow: 0 4px 14px rgba(26,86,219,0.3);
            transition: var(--transition);
        }
        .header-cta:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(26,86,219,0.4);
        }
        .mobile-toggle {
            display: none;
            background: transparent;
            font-size: 1.6rem;
            color: var(--text-main);
            padding: 4px;
        }
        @media (max-width: 920px) {
            .nav-list {
                display: none;
                position: absolute;
                top: 72px;
                left: 0;
                right: 0;
                flex-direction: column;
                background: rgba(255,255,255,0.98);
                backdrop-filter: blur(16px);
                border-bottom: 1px solid var(--border-color);
                padding: 16px 24px;
                gap: 4px;
                box-shadow: var(--shadow);
            }
            .nav-list.open {
                display: flex;
            }
            .nav-list a {
                padding: 12px 16px;
                border-radius: var(--radius-sm);
                width: 100%;
            }
            .search-box input {
                width: 100px;
            }
            .mobile-toggle {
                display: block;
            }
            .header-cta span {
                display: none;
            }
        }
        @media (max-width: 520px) {
            .header-inner {
                height: 64px;
            }
            .logo {
                font-size: 1.2rem;
            }
            .header-cta {
                padding: 8px 16px;
                font-size: 0.85rem;
            }
            .search-box {
                display: none;
            }
        }

        /* ===== Hero ===== */
        .hero {
            position: relative;
            min-height: 88vh;
            display: flex;
            align-items: center;
            justify-content: center;
            background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
            isolation: isolate;
        }
        .hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(15,23,42,0.82) 0%, rgba(30,64,175,0.55) 100%);
            z-index: 1;
        }
        .hero-content {
            position: relative;
            z-index: 2;
            text-align: center;
            max-width: 860px;
            padding: 40px 24px;
        }
        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 8px 20px;
            border-radius: 40px;
            background: rgba(255,255,255,0.15);
            backdrop-filter: blur(4px);
            color: #fff;
            font-size: 0.85rem;
            font-weight: 500;
            letter-spacing: 0.5px;
            margin-bottom: 24px;
            border: 1px solid rgba(255,255,255,0.2);
        }
        .hero h1 {
            font-size: clamp(2.4rem, 6vw, 4.2rem);
            font-weight: 900;
            color: #fff;
            line-height: 1.15;
            letter-spacing: -1px;
            margin-bottom: 20px;
        }
        .hero h1 span {
            background: linear-gradient(135deg, #facc15, #f97316);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .hero p {
            font-size: clamp(1rem, 2vw, 1.25rem);
            color: rgba(255,255,255,0.85);
            max-width: 680px;
            margin: 0 auto 36px;
            line-height: 1.8;
        }
        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            justify-content: center;
        }
        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 16px 36px;
            border-radius: 60px;
            font-weight: 700;
            font-size: 1.05rem;
            color: #fff;
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            box-shadow: 0 8px 28px rgba(26,86,219,0.35);
            transition: var(--transition);
        }
        .btn-primary:hover {
            transform: translateY(-3px) scale(1.02);
            box-shadow: 0 14px 40px rgba(26,86,219,0.45);
        }
        .btn-outline {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 16px 36px;
            border-radius: 60px;
            font-weight: 600;
            font-size: 1.05rem;
            color: #fff;
            border: 2px solid rgba(255,255,255,0.5);
            background: rgba(255,255,255,0.08);
            backdrop-filter: blur(4px);
            transition: var(--transition);
        }
        .btn-outline:hover {
            background: rgba(255,255,255,0.2);
            border-color: #fff;
            transform: translateY(-2px);
        }
        .hero-stats {
            display: flex;
            flex-wrap: wrap;
            gap: 32px;
            justify-content: center;
            margin-top: 48px;
            padding-top: 40px;
            border-top: 1px solid rgba(255,255,255,0.15);
        }
        .hero-stat {
            text-align: center;
            color: #fff;
        }
        .hero-stat .num {
            font-size: 2.2rem;
            font-weight: 800;
            line-height: 1.2;
        }
        .hero-stat .label {
            font-size: 0.9rem;
            color: rgba(255,255,255,0.7);
        }
        @media (max-width: 768px) {
            .hero {
                min-height: 70vh;
            }
            .hero-stats {
                gap: 20px;
            }
            .hero-stat .num {
                font-size: 1.6rem;
            }
        }
        @media (max-width: 520px) {
            .hero {
                min-height: 60vh;
            }
            .btn-primary, .btn-outline {
                padding: 14px 28px;
                font-size: 0.95rem;
            }
        }

        /* ===== Section ===== */
        .section {
            padding: 80px 0;
        }
        .section-header {
            text-align: center;
            margin-bottom: 52px;
        }
        .section-header h2 {
            font-size: clamp(1.8rem, 3.5vw, 2.6rem);
            font-weight: 800;
            letter-spacing: -0.5px;
            color: var(--text-main);
            margin-bottom: 12px;
        }
        .section-header h2 i {
            color: var(--primary-light);
            margin-right: 8px;
        }
        .section-header p {
            font-size: 1.05rem;
            color: var(--text-muted);
            max-width: 620px;
            margin: 0 auto;
        }
        .section-divider {
            width: 60px;
            height: 4px;
            background: linear-gradient(90deg, var(--primary), var(--secondary));
            border-radius: 4px;
            margin: 16px auto 0;
        }
        @media (max-width: 768px) {
            .section {
                padding: 56px 0;
            }
            .section-header {
                margin-bottom: 36px;
            }
        }

        /* ===== Cards Grid ===== */
        .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;
        }
        @media (max-width: 1024px) {
            .grid-4 {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 768px) {
            .grid-3, .grid-4, .grid-2 {
                grid-template-columns: 1fr;
                gap: 20px;
            }
        }

        /* ===== Card ===== */
        .card {
            background: var(--bg-card);
            border-radius: var(--radius);
            border: 1px solid var(--border-color);
            box-shadow: var(--shadow-sm);
            overflow: hidden;
            transition: var(--transition);
        }
        .card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-lg);
            border-color: transparent;
        }
        .card-img {
            width: 100%;
            height: 200px;
            object-fit: cover;
            display: block;
        }
        .card-body {
            padding: 24px;
        }
        .card-body h3 {
            font-size: 1.15rem;
            font-weight: 700;
            margin-bottom: 8px;
            color: var(--text-main);
        }
        .card-body h3 a:hover {
            color: var(--primary);
        }
        .card-body p {
            font-size: 0.95rem;
            color: var(--text-muted);
            line-height: 1.7;
        }
        .card-meta {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
            margin-top: 14px;
            font-size: 0.85rem;
            color: var(--text-light);
        }
        .card-meta .tag {
            display: inline-flex;
            align-items: center;
            gap: 4px;
            padding: 4px 12px;
            border-radius: 20px;
            background: rgba(26,86,219,0.08);
            color: var(--primary);
            font-weight: 500;
            font-size: 0.8rem;
        }
        .card-meta .date {
            display: flex;
            align-items: center;
            gap: 4px;
        }

        /* ===== Category Card ===== */
        .cat-card {
            background: var(--bg-card);
            border-radius: var(--radius);
            border: 1px solid var(--border-color);
            box-shadow: var(--shadow-sm);
            padding: 32px 24px;
            text-align: center;
            transition: var(--transition);
        }
        .cat-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-lg);
            border-color: var(--primary-light);
        }
        .cat-card .icon {
            font-size: 2.4rem;
            color: var(--primary-light);
            margin-bottom: 16px;
        }
        .cat-card h3 {
            font-size: 1.15rem;
            font-weight: 700;
            margin-bottom: 8px;
        }
        .cat-card p {
            font-size: 0.9rem;
            color: var(--text-muted);
        }
        .cat-card .count-badge {
            display: inline-block;
            margin-top: 12px;
            padding: 4px 16px;
            border-radius: 20px;
            background: rgba(26,86,219,0.08);
            color: var(--primary);
            font-size: 0.8rem;
            font-weight: 600;
        }

        /* ===== Feature Block ===== */
        .feature-block {
            display: flex;
            align-items: center;
            gap: 48px;
        }
        .feature-block .text {
            flex: 1;
        }
        .feature-block .media {
            flex: 1;
            border-radius: var(--radius);
            overflow: hidden;
            box-shadow: var(--shadow);
        }
        .feature-block .media img {
            width: 100%;
            height: 340px;
            object-fit: cover;
        }
        .feature-block.reverse {
            flex-direction: row-reverse;
        }
        @media (max-width: 768px) {
            .feature-block, .feature-block.reverse {
                flex-direction: column;
                gap: 24px;
            }
            .feature-block .media img {
                height: 220px;
            }
        }

        /* ===== Data / Stats ===== */
        .data-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }
        .data-card {
            background: var(--bg-card);
            border-radius: var(--radius);
            border: 1px solid var(--border-color);
            padding: 32px 20px;
            text-align: center;
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
        }
        .data-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow);
        }
        .data-card .num {
            font-size: 2.6rem;
            font-weight: 900;
            color: var(--primary);
            line-height: 1.2;
        }
        .data-card .num span {
            font-size: 1.2rem;
            font-weight: 600;
            color: var(--text-muted);
        }
        .data-card .label {
            font-size: 0.95rem;
            color: var(--text-muted);
            margin-top: 6px;
        }
        @media (max-width: 1024px) {
            .data-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 520px) {
            .data-grid {
                grid-template-columns: 1fr;
            }
        }

        /* ===== List ===== */
        .list-group {
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .list-item {
            display: flex;
            align-items: center;
            gap: 16px;
            padding: 18px 24px;
            background: var(--bg-card);
            border-radius: var(--radius-sm);
            border: 1px solid var(--border-color);
            transition: var(--transition);
        }
        .list-item:hover {
            border-color: var(--primary-light);
            box-shadow: var(--shadow-sm);
            transform: translateX(4px);
        }
        .list-item .rank {
            width: 36px;
            height: 36px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 50%;
            font-weight: 800;
            font-size: 1rem;
            color: #fff;
            background: var(--primary);
            flex-shrink: 0;
        }
        .list-item .info {
            flex: 1;
        }
        .list-item .info h4 {
            font-weight: 600;
            font-size: 1rem;
        }
        .list-item .info h4 a:hover {
            color: var(--primary);
        }
        .list-item .info p {
            font-size: 0.9rem;
            color: var(--text-muted);
        }
        .list-item .badge {
            padding: 4px 14px;
            border-radius: 20px;
            font-size: 0.75rem;
            font-weight: 600;
            background: rgba(14,165,233,0.1);
            color: var(--secondary);
            flex-shrink: 0;
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .faq-item {
            background: var(--bg-card);
            border-radius: var(--radius-sm);
            border: 1px solid var(--border-color);
            overflow: hidden;
            transition: var(--transition);
        }
        .faq-item:hover {
            border-color: var(--primary-light);
        }
        .faq-question {
            width: 100%;
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 20px 24px;
            background: transparent;
            font-weight: 600;
            font-size: 1rem;
            color: var(--text-main);
            text-align: left;
            gap: 16px;
        }
        .faq-question i {
            color: var(--primary-light);
            transition: var(--transition);
            font-size: 1.1rem;
        }
        .faq-item.active .faq-question i {
            transform: rotate(180deg);
        }
        .faq-answer {
            padding: 0 24px 20px;
            font-size: 0.95rem;
            color: var(--text-muted);
            line-height: 1.8;
            display: none;
        }
        .faq-item.active .faq-answer {
            display: block;
        }

        /* ===== CTA ===== */
        .cta-section {
            background: linear-gradient(135deg, var(--primary-dark), var(--primary));
            padding: 80px 0;
            text-align: center;
            color: #fff;
        }
        .cta-section h2 {
            font-size: clamp(1.8rem, 3vw, 2.6rem);
            font-weight: 800;
            margin-bottom: 16px;
        }
        .cta-section p {
            font-size: 1.1rem;
            color: rgba(255,255,255,0.8);
            max-width: 600px;
            margin: 0 auto 32px;
        }
        .cta-section .btn-cta {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 18px 48px;
            border-radius: 60px;
            font-weight: 700;
            font-size: 1.1rem;
            color: var(--primary-dark);
            background: #fff;
            box-shadow: 0 8px 28px rgba(0,0,0,0.2);
            transition: var(--transition);
        }
        .cta-section .btn-cta:hover {
            transform: translateY(-3px) scale(1.03);
            box-shadow: 0 14px 40px rgba(0,0,0,0.3);
        }

        /* ===== Footer ===== */
        .site-footer {
            background: #0f172a;
            color: rgba(255,255,255,0.7);
            padding: 60px 0 30px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 40px;
        }
        .footer-brand h3 {
            font-size: 1.4rem;
            font-weight: 800;
            color: #fff;
            margin-bottom: 12px;
        }
        .footer-brand h3 i {
            color: var(--primary-light);
            margin-right: 6px;
        }
        .footer-brand p {
            font-size: 0.9rem;
            line-height: 1.8;
            max-width: 320px;
        }
        .footer-col h4 {
            font-size: 1rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 16px;
        }
        .footer-col ul {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 10px;
        }
        .footer-col ul a {
            font-size: 0.9rem;
            color: rgba(255,255,255,0.6);
            transition: var(--transition);
        }
        .footer-col ul a:hover {
            color: #fff;
            padding-left: 4px;
        }
        .footer-bottom {
            border-top: 1px solid rgba(255,255,255,0.1);
            padding-top: 24px;
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            align-items: center;
            gap: 12px;
            font-size: 0.85rem;
            color: rgba(255,255,255,0.4);
        }
        .footer-bottom a {
            color: rgba(255,255,255,0.5);
        }
        .footer-bottom a:hover {
            color: #fff;
        }
        @media (max-width: 768px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 28px;
            }
            .footer-brand {
                grid-column: 1 / -1;
            }
        }
        @media (max-width: 520px) {
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
        }

        /* ===== Posts List (CMS) ===== */
        .posts-list {
            display: flex;
            flex-direction: column;
            gap: 16px;
        }
        .post-item {
            display: flex;
            align-items: flex-start;
            gap: 20px;
            padding: 20px 24px;
            background: var(--bg-card);
            border-radius: var(--radius-sm);
            border: 1px solid var(--border-color);
            transition: var(--transition);
        }
        .post-item:hover {
            border-color: var(--primary-light);
            box-shadow: var(--shadow-sm);
            transform: translateX(4px);
        }
        .post-item .thumb {
            width: 120px;
            height: 80px;
            border-radius: 6px;
            object-fit: cover;
            flex-shrink: 0;
        }
        .post-item .info {
            flex: 1;
        }
        .post-item .info h4 {
            font-weight: 600;
            font-size: 1.05rem;
            margin-bottom: 4px;
        }
        .post-item .info h4 a:hover {
            color: var(--primary);
        }
        .post-item .info p {
            font-size: 0.9rem;
            color: var(--text-muted);
            line-height: 1.6;
        }
        .post-item .meta {
            display: flex;
            gap: 12px;
            margin-top: 8px;
            font-size: 0.8rem;
            color: var(--text-light);
        }
        .post-item .meta .tag {
            padding: 2px 10px;
            border-radius: 12px;
            background: rgba(26,86,219,0.06);
            color: var(--primary);
            font-weight: 500;
        }
        @media (max-width: 520px) {
            .post-item {
                flex-direction: column;
                padding: 16px;
            }
            .post-item .thumb {
                width: 100%;
                height: 180px;
            }
        }

        /* ===== Misc ===== */
        .text-center { text-align: center; }
        .mb-8 { margin-bottom: 32px; }
        .mt-8 { margin-top: 32px; }
        .gap-4 { gap: 16px; }
        .flex-center {
            display: flex;
            align-items: center;
            justify-content: center;
        }
        .empty-state {
            padding: 48px 24px;
            text-align: center;
            color: var(--text-muted);
            background: var(--bg-card);
            border-radius: var(--radius);
            border: 1px dashed var(--border-color);
        }
        .empty-state i {
            font-size: 2.4rem;
            margin-bottom: 12px;
            color: var(--text-light);
        }

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

        /* ===== Focus ===== */
        a:focus-visible, button:focus-visible, input:focus-visible {
            outline: 3px solid var(--primary-light);
            outline-offset: 2px;
        }

/* roulang page: article */
/* ===== 设计变量 ===== */
        :root {
            --primary: #1a56db;
            --primary-dark: #0f3a8e;
            --primary-light: #3b82f6;
            --primary-50: #eef2ff;
            --primary-100: #dbeafe;
            --accent: #f59e0b;
            --accent-dark: #d97706;
            --accent-light: #fbbf24;
            --bg-body: #f8fafc;
            --bg-white: #ffffff;
            --bg-card: #ffffff;
            --bg-dark: #0f172a;
            --bg-gray: #f1f5f9;
            --text-primary: #0f172a;
            --text-secondary: #475569;
            --text-muted: #94a3b8;
            --text-white: #ffffff;
            --border: #e2e8f0;
            --border-light: #f1f5f9;
            --radius-sm: 8px;
            --radius-md: 12px;
            --radius-lg: 16px;
            --radius-xl: 20px;
            --shadow-sm: 0 1px 3px rgba(0,0,0,0.06), 0 1px 2px rgba(0,0,0,0.04);
            --shadow-md: 0 4px 12px rgba(0,0,0,0.08);
            --shadow-lg: 0 10px 30px rgba(0,0,0,0.12);
            --shadow-xl: 0 20px 50px rgba(0,0,0,0.16);
            --spacing-xs: 4px;
            --spacing-sm: 8px;
            --spacing-md: 16px;
            --spacing-lg: 24px;
            --spacing-xl: 32px;
            --spacing-2xl: 48px;
            --spacing-3xl: 64px;
            --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, 'Noto Sans SC', sans-serif;
            --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
            --max-width: 1200px;
        }

        /* ===== 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);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        img { max-width: 100%; height: auto; display: block; }
        a { color: var(--primary); text-decoration: none; transition: color var(--transition); }
        a:hover { color: var(--primary-dark); }
        a:focus-visible { outline: 2px solid var(--primary-light); outline-offset: 2px; border-radius: 4px; }
        button { cursor: pointer; font-family: inherit; border: none; background: none; }
        input, textarea { font-family: inherit; font-size: 1rem; }
        ul, ol { list-style: none; }
        h1, h2, h3, h4, h5, h6 { line-height: 1.3; font-weight: 700; color: var(--text-primary); }
        h1 { font-size: clamp(1.75rem, 4vw, 2.5rem); }
        h2 { font-size: clamp(1.35rem, 3vw, 1.85rem); }
        h3 { font-size: clamp(1.1rem, 2vw, 1.4rem); }
        h4 { font-size: 1.1rem; }
        p { margin-bottom: 1em; color: var(--text-secondary); }
        p:last-child { margin-bottom: 0; }
        .container {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 var(--spacing-lg);
        }
        @media (max-width: 768px) {
            .container { padding: 0 var(--spacing-md); }
        }

        /* ===== 按钮 ===== */
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 10px 22px;
            font-size: 0.95rem;
            font-weight: 600;
            border-radius: var(--radius-sm);
            transition: all var(--transition);
            border: 2px solid transparent;
            text-decoration: none;
            line-height: 1.4;
            white-space: nowrap;
        }
        .btn:focus-visible { outline: 2px solid var(--primary-light); outline-offset: 2px; }
        .btn-primary {
            background: var(--primary);
            color: var(--text-white);
            border-color: var(--primary);
        }
        .btn-primary:hover { background: var(--primary-dark); border-color: var(--primary-dark); color: var(--text-white); transform: translateY(-2px); box-shadow: var(--shadow-md); }
        .btn-primary:active { transform: translateY(0); box-shadow: var(--shadow-sm); }
        .btn-outline {
            background: transparent;
            color: var(--primary);
            border-color: var(--primary);
        }
        .btn-outline:hover { background: var(--primary); color: var(--text-white); transform: translateY(-2px); box-shadow: var(--shadow-md); }
        .btn-outline:active { transform: translateY(0); }
        .btn-accent {
            background: var(--accent);
            color: #1e293b;
            border-color: var(--accent);
        }
        .btn-accent:hover { background: var(--accent-dark); border-color: var(--accent-dark); color: #1e293b; transform: translateY(-2px); box-shadow: var(--shadow-md); }
        .btn-sm { padding: 6px 14px; font-size: 0.85rem; }
        .btn-lg { padding: 14px 32px; font-size: 1.05rem; }

        /* ===== 徽章 / 标签 ===== */
        .badge {
            display: inline-block;
            padding: 4px 12px;
            font-size: 0.8rem;
            font-weight: 600;
            border-radius: 50px;
            background: var(--primary-100);
            color: var(--primary-dark);
            white-space: nowrap;
        }
        .badge-accent {
            background: #fef3c7;
            color: #92400e;
        }
        .badge-green {
            background: #d1fae5;
            color: #065f46;
        }
        .badge-gray {
            background: var(--bg-gray);
            color: var(--text-secondary);
        }

        /* ===== 分隔线 ===== */
        .divider {
            width: 60px;
            height: 4px;
            background: var(--primary);
            border-radius: 4px;
            margin: var(--spacing-md) 0 var(--spacing-lg);
        }
        .divider-center { margin-left: auto; margin-right: auto; }
        .divider-light { background: var(--primary-100); }

        /* ===== 卡片 ===== */
        .card {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border);
            transition: all var(--transition);
            overflow: hidden;
        }
        .card:hover { box-shadow: var(--shadow-lg); transform: translateY(-4px); }
        .card-img { width: 100%; aspect-ratio: 16/9; object-fit: cover; }
        .card-body { padding: var(--spacing-lg); }
        .card-title { font-size: 1.1rem; font-weight: 700; margin-bottom: var(--spacing-sm); color: var(--text-primary); }
        .card-text { font-size: 0.92rem; color: var(--text-secondary); margin-bottom: var(--spacing-md); }

        /* ===== 导航 ===== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: rgba(255,255,255,0.96);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--border);
            box-shadow: 0 1px 4px rgba(0,0,0,0.04);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 68px;
            gap: var(--spacing-lg);
        }
        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.35rem;
            font-weight: 800;
            color: var(--text-primary);
            text-decoration: none;
            flex-shrink: 0;
        }
        .logo i { color: var(--primary); font-size: 1.5rem; }
        .logo:hover { color: var(--primary); }
        .nav-list {
            display: flex;
            align-items: center;
            gap: var(--spacing-xs);
        }
        .nav-list a {
            display: block;
            padding: 8px 16px;
            font-size: 0.92rem;
            font-weight: 500;
            color: var(--text-secondary);
            border-radius: var(--radius-sm);
            transition: all var(--transition);
            text-decoration: none;
        }
        .nav-list a:hover { background: var(--primary-50); color: var(--primary); }
        .nav-list a.active {
            background: var(--primary);
            color: var(--text-white);
        }
        .nav-list a.active:hover { background: var(--primary-dark); }
        .header-actions {
            display: flex;
            align-items: center;
            gap: var(--spacing-sm);
            flex-shrink: 0;
        }
        .search-box {
            display: flex;
            align-items: center;
            background: var(--bg-gray);
            border-radius: 50px;
            padding: 0 12px;
            border: 1px solid var(--border);
            transition: all var(--transition);
        }
        .search-box:focus-within { border-color: var(--primary-light); background: var(--bg-white); box-shadow: 0 0 0 3px rgba(26,86,219,0.1); }
        .search-box input {
            border: none;
            background: transparent;
            padding: 8px 6px;
            font-size: 0.88rem;
            color: var(--text-primary);
            outline: none;
            width: 140px;
        }
        .search-box input::placeholder { color: var(--text-muted); }
        .search-box button { color: var(--text-muted); padding: 6px; font-size: 0.95rem; transition: color var(--transition); }
        .search-box button:hover { color: var(--primary); }
        .mobile-toggle { display: none; font-size: 1.5rem; color: var(--text-primary); padding: 6px; }

        /* ===== 页脚 ===== */
        .site-footer {
            background: var(--bg-dark);
            color: #cbd5e1;
            padding: var(--spacing-3xl) 0 var(--spacing-lg);
            margin-top: var(--spacing-3xl);
        }
        .site-footer a { color: #94a3b8; transition: color var(--transition); }
        .site-footer a:hover { color: var(--text-white); }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.8fr 1fr 1fr 1fr;
            gap: var(--spacing-xl);
            margin-bottom: var(--spacing-2xl);
        }
        .footer-brand h3 { color: var(--text-white); font-size: 1.25rem; margin-bottom: var(--spacing-sm); display: flex; align-items: center; gap: 8px; }
        .footer-brand h3 i { color: var(--primary-light); }
        .footer-brand p { font-size: 0.9rem; color: #94a3b8; line-height: 1.7; }
        .footer-col h4 { color: var(--text-white); font-size: 0.95rem; margin-bottom: var(--spacing-md); font-weight: 600; }
        .footer-col ul li { margin-bottom: var(--spacing-sm); }
        .footer-col ul li a { font-size: 0.88rem; display: inline-flex; align-items: center; gap: 6px; }
        .footer-col ul li a i { font-size: 0.85rem; }
        .footer-bottom {
            border-top: 1px solid rgba(255,255,255,0.08);
            padding-top: var(--spacing-lg);
            display: flex;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: var(--spacing-sm);
            font-size: 0.85rem;
            color: #64748b;
        }
        .footer-bottom a { color: #94a3b8; }
        .footer-bottom a:hover { color: var(--text-white); }

        /* ===== 文章详情页 ===== */
        .article-banner {
            background: linear-gradient(135deg, var(--bg-dark) 0%, #1e293b 100%);
            padding: var(--spacing-3xl) 0 var(--spacing-2xl);
            position: relative;
            overflow: hidden;
        }
        .article-banner::after {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.png') center/cover no-repeat;
            opacity: 0.08;
            pointer-events: none;
        }
        .article-banner .container { position: relative; z-index: 1; }
        .article-breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 0.85rem;
            color: #94a3b8;
            margin-bottom: var(--spacing-md);
        }
        .article-breadcrumb a { color: #94a3b8; }
        .article-breadcrumb a:hover { color: var(--text-white); }
        .article-breadcrumb span { color: #64748b; }
        .article-banner h1 {
            color: var(--text-white);
            font-size: clamp(1.6rem, 3.5vw, 2.4rem);
            max-width: 800px;
            margin-bottom: var(--spacing-md);
        }
        .article-meta {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: var(--spacing-md);
            color: #94a3b8;
            font-size: 0.88rem;
        }
        .article-meta .badge { background: rgba(255,255,255,0.12); color: #e2e8f0; }
        .article-meta i { margin-right: 4px; }
        .article-meta time { display: inline-flex; align-items: center; gap: 4px; }

        .article-main {
            padding: var(--spacing-2xl) 0 var(--spacing-3xl);
        }
        .article-layout {
            display: grid;
            grid-template-columns: 1fr 320px;
            gap: var(--spacing-2xl);
        }
        .article-content {
            background: var(--bg-card);
            border-radius: var(--radius-lg);
            padding: var(--spacing-xl);
            border: 1px solid var(--border);
            box-shadow: var(--shadow-sm);
        }
        .article-content .featured-image {
            width: 100%;
            border-radius: var(--radius-md);
            margin-bottom: var(--spacing-lg);
            aspect-ratio: 16/9;
            object-fit: cover;
        }
        .article-body {
            font-size: 1.02rem;
            line-height: 1.85;
            color: var(--text-primary);
        }
        .article-body p {
            margin-bottom: 1.2em;
            color: var(--text-secondary);
        }
        .article-body h2, .article-body h3 {
            margin-top: 1.8em;
            margin-bottom: 0.6em;
        }
        .article-body ul, .article-body ol {
            margin-bottom: 1.2em;
            padding-left: 1.5em;
            color: var(--text-secondary);
        }
        .article-body ul li { list-style: disc; margin-bottom: 0.4em; }
        .article-body ol li { list-style: decimal; margin-bottom: 0.4em; }
        .article-body img { border-radius: var(--radius-md); margin: 1.5em 0; }
        .article-body blockquote {
            border-left: 4px solid var(--primary);
            background: var(--primary-50);
            padding: var(--spacing-md) var(--spacing-lg);
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            margin: 1.5em 0;
            color: var(--text-secondary);
        }
        .article-body a { color: var(--primary); text-decoration: underline; text-underline-offset: 2px; }
        .article-body a:hover { color: var(--primary-dark); }

        .article-sidebar {
            display: flex;
            flex-direction: column;
            gap: var(--spacing-lg);
        }
        .sidebar-card {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            border: 1px solid var(--border);
            padding: var(--spacing-lg);
            box-shadow: var(--shadow-sm);
        }
        .sidebar-card h3 {
            font-size: 1rem;
            font-weight: 700;
            margin-bottom: var(--spacing-md);
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .sidebar-card h3 i { color: var(--primary); }
        .sidebar-list li {
            padding: var(--spacing-sm) 0;
            border-bottom: 1px solid var(--border-light);
        }
        .sidebar-list li:last-child { border-bottom: none; }
        .sidebar-list a {
            font-size: 0.9rem;
            color: var(--text-secondary);
            display: block;
            transition: all var(--transition);
        }
        .sidebar-list a:hover { color: var(--primary); padding-left: 4px; }
        .sidebar-list .post-date {
            font-size: 0.78rem;
            color: var(--text-muted);
            display: block;
            margin-top: 2px;
        }
        .sidebar-cta {
            text-align: center;
        }
        .sidebar-cta p { font-size: 0.9rem; color: var(--text-secondary); margin-bottom: var(--spacing-md); }
        .sidebar-cta .btn { width: 100%; justify-content: center; }

        .article-nav {
            display: flex;
            justify-content: space-between;
            gap: var(--spacing-md);
            margin-top: var(--spacing-2xl);
            padding-top: var(--spacing-lg);
            border-top: 1px solid var(--border);
        }
        .article-nav a {
            display: flex;
            flex-direction: column;
            gap: 4px;
            font-size: 0.88rem;
            color: var(--text-secondary);
            max-width: 45%;
        }
        .article-nav a span { font-weight: 600; color: var(--text-primary); transition: color var(--transition); }
        .article-nav a:hover span { color: var(--primary); }
        .article-nav .nav-next { text-align: right; }

        .not-found-box {
            text-align: center;
            padding: var(--spacing-3xl) var(--spacing-lg);
        }
        .not-found-box i { font-size: 3rem; color: var(--text-muted); margin-bottom: var(--spacing-lg); }
        .not-found-box h2 { margin-bottom: var(--spacing-md); }
        .not-found-box p { color: var(--text-secondary); margin-bottom: var(--spacing-lg); }

        /* ===== 响应式 ===== */
        @media (max-width: 1024px) {
            .article-layout { grid-template-columns: 1fr; }
            .article-sidebar { display: grid; grid-template-columns: 1fr 1fr; gap: var(--spacing-lg); }
        }
        @media (max-width: 768px) {
            .header-inner { height: 60px; }
            .nav-list { display: none; }
            .mobile-toggle { display: block; }
            .header-actions .search-box { display: none; }
            .mobile-nav-open .nav-list {
                display: flex;
                flex-direction: column;
                position: absolute;
                top: 60px;
                left: 0;
                right: 0;
                background: rgba(255,255,255,0.98);
                backdrop-filter: blur(16px);
                border-bottom: 1px solid var(--border);
                padding: var(--spacing-md);
                gap: var(--spacing-xs);
                box-shadow: var(--shadow-lg);
            }
            .mobile-nav-open .nav-list a { padding: 12px 16px; width: 100%; }
            .footer-grid { grid-template-columns: 1fr 1fr; }
            .footer-brand { grid-column: 1 / -1; }
            .article-banner { padding: var(--spacing-2xl) 0 var(--spacing-xl); }
            .article-content { padding: var(--spacing-md); }
            .article-sidebar { grid-template-columns: 1fr; }
            .article-nav { flex-direction: column; }
            .article-nav a { max-width: 100%; }
            .article-nav .nav-next { text-align: left; }
            .footer-bottom { flex-direction: column; text-align: center; }
        }
        @media (max-width: 520px) {
            .header-inner { height: 56px; }
            .logo { font-size: 1.1rem; }
            .logo i { font-size: 1.2rem; }
            .footer-grid { grid-template-columns: 1fr; }
            .article-meta { flex-direction: column; align-items: flex-start; gap: var(--spacing-sm); }
        }
        @media (min-width: 769px) {
            .mobile-toggle { display: none !important; }
            .nav-list { display: flex !important; }
        }

        /* ===== 辅助 ===== */
        .text-center { text-align: center; }
        .mt-lg { margin-top: var(--spacing-lg); }
        .mb-lg { margin-bottom: var(--spacing-lg); }
        .gap-md { gap: var(--spacing-md); }
        .flex-center { display: flex; align-items: center; justify-content: center; }
        .sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0,0,0,0); border: 0; }

/* roulang page: category1 */
/* ===== 设计变量 ===== */
:root {
  --primary: #1a56db;
  --primary-light: #3b82f6;
  --primary-dark: #1e40af;
  --primary-bg: #eff6ff;
  --accent: #06b6d4;
  --accent-light: #22d3ee;
  --accent-dark: #0891b2;
  --success: #10b981;
  --warning: #f59e0b;
  --danger: #ef4444;
  --bg: #ffffff;
  --bg-alt: #f8fafc;
  --bg-card: #ffffff;
  --text: #0f172a;
  --text-secondary: #475569;
  --text-weak: #94a3b8;
  --border: #e2e8f0;
  --border-light: #f1f5f9;
  --radius: 12px;
  --radius-sm: 8px;
  --radius-lg: 20px;
  --shadow: 0 1px 3px rgba(0,0,0,0.06), 0 1px 2px rgba(0,0,0,0.04);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.08);
  --shadow-lg: 0 12px 40px rgba(0,0,0,0.12);
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  --max-width: 1200px;
  --nav-height: 72px;
  --spacing-section: 80px;
  --spacing-card: 24px;
}

/* ===== Reset & Base ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-font-smoothing: antialiased; }
body {
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.7;
  color: var(--text);
  background: var(--bg);
}
a { color: var(--primary); text-decoration: none; transition: var(--transition); }
a:hover { color: var(--primary-dark); }
img { max-width: 100%; height: auto; display: block; border-radius: var(--radius-sm); }
ul, ol { list-style: none; }
button, input, textarea, select { font-family: inherit; font-size: inherit; outline: none; }
button { cursor: pointer; border: none; background: none; }
.container { width: 100%; max-width: var(--max-width); margin: 0 auto; padding: 0 24px; }

/* ===== 标题 ===== */
h1, h2, h3, h4, h5, h6 { line-height: 1.3; color: var(--text); font-weight: 700; }
h1 { font-size: 2.75rem; letter-spacing: -0.02em; }
h2 { font-size: 2rem; letter-spacing: -0.01em; }
h3 { font-size: 1.35rem; }
h4 { font-size: 1.1rem; }
.section-title { text-align: center; margin-bottom: 48px; }
.section-title h2 { position: relative; display: inline-block; }
.section-title h2::after { content: ''; display: block; width: 60px; height: 4px; background: var(--primary); border-radius: 4px; margin: 12px auto 0; }
.section-title p { color: var(--text-secondary); margin-top: 12px; font-size: 1.1rem; max-width: 640px; margin-left: auto; margin-right: auto; }

/* ===== 导航 ===== */
.site-header {
  position: sticky; top: 0; z-index: 100;
  background: rgba(255,255,255,0.96); backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  height: var(--nav-height);
  display: flex; align-items: center;
}
.header-inner { display: flex; align-items: center; justify-content: space-between; width: 100%; max-width: var(--max-width); margin: 0 auto; padding: 0 24px; }
.logo { display: flex; align-items: center; gap: 10px; font-size: 1.5rem; font-weight: 800; color: var(--primary); letter-spacing: -0.03em; }
.logo i { font-size: 1.6rem; color: var(--accent); }
.logo span { background: linear-gradient(135deg, var(--primary), var(--accent)); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
.nav-list { display: flex; align-items: center; gap: 8px; }
.nav-list li a {
  display: block; padding: 8px 18px; border-radius: var(--radius-sm);
  font-weight: 500; font-size: 0.95rem; color: var(--text-secondary);
  transition: var(--transition); position: relative;
}
.nav-list li a:hover { color: var(--primary); background: var(--primary-bg); }
.nav-list li a.active { color: var(--primary); background: var(--primary-bg); font-weight: 600; }
.nav-list li a.active::after { content: ''; position: absolute; bottom: 2px; left: 50%; transform: translateX(-50%); width: 20px; height: 3px; background: var(--primary); border-radius: 4px; }
.header-actions { display: flex; align-items: center; gap: 16px; }
.header-search { position: relative; }
.header-search input {
  width: 200px; padding: 8px 16px 8px 38px; border: 1px solid var(--border); border-radius: 24px;
  background: var(--bg-alt); font-size: 0.9rem; transition: var(--transition);
}
.header-search input:focus { border-color: var(--primary); box-shadow: 0 0 0 3px rgba(26,86,219,0.1); width: 240px; }
.header-search i { position: absolute; left: 14px; top: 50%; transform: translateY(-50%); color: var(--text-weak); font-size: 0.9rem; }
.header-cta {
  padding: 8px 24px; border-radius: 24px; background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  color: #fff; font-weight: 600; font-size: 0.9rem; transition: var(--transition); white-space: nowrap;
}
.header-cta:hover { transform: translateY(-2px); box-shadow: 0 6px 20px rgba(26,86,219,0.3); color: #fff; }
.mobile-toggle { display: none; font-size: 1.5rem; color: var(--text); cursor: pointer; }

/* ===== Hero 内页横幅 ===== */
.page-hero {
  position: relative; padding: 80px 0 72px; overflow: hidden;
  background: linear-gradient(135deg, #0f172a 0%, #1e3a5f 50%, #0f172a 100%);
  min-height: 320px; display: flex; align-items: center;
}
.page-hero::before {
  content: ''; position: absolute; inset: 0;
  background: url('/assets/images/backpic/back-2.png') center/cover no-repeat;
  opacity: 0.15; mix-blend-mode: overlay;
}
.page-hero::after {
  content: ''; position: absolute; bottom: 0; left: 0; right: 0; height: 80px;
  background: linear-gradient(to top, var(--bg), transparent);
}
.hero-content { position: relative; z-index: 2; max-width: 800px; }
.hero-content .breadcrumb { display: flex; align-items: center; gap: 8px; font-size: 0.9rem; color: rgba(255,255,255,0.6); margin-bottom: 16px; }
.hero-content .breadcrumb a { color: rgba(255,255,255,0.7); }
.hero-content .breadcrumb a:hover { color: #fff; }
.hero-content .breadcrumb i { font-size: 0.7rem; }
.hero-content h1 { color: #fff; font-size: 2.8rem; margin-bottom: 16px; }
.hero-content p { color: rgba(255,255,255,0.8); font-size: 1.15rem; max-width: 600px; line-height: 1.8; }
.hero-tags { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 24px; }
.hero-tags span {
  padding: 6px 16px; border-radius: 20px; background: rgba(255,255,255,0.1); border: 1px solid rgba(255,255,255,0.15);
  color: rgba(255,255,255,0.85); font-size: 0.85rem; backdrop-filter: blur(4px);
}

/* ===== 板块通用 ===== */
.section-block { padding: var(--spacing-section) 0; }
.section-block.bg-alt { background: var(--bg-alt); }
.section-block.bg-primary { background: var(--primary-bg); }
.section-block .container { position: relative; }

/* ===== 卡片网格 ===== */
.card-grid { display: grid; gap: var(--spacing-card); }
.card-grid-3 { grid-template-columns: repeat(3, 1fr); }
.card-grid-4 { grid-template-columns: repeat(4, 1fr); }
.card-grid-2 { grid-template-columns: repeat(2, 1fr); }
.card {
  background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 28px 24px; transition: var(--transition); position: relative; overflow: hidden;
}
.card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); border-color: transparent; }
.card-icon { width: 52px; height: 52px; border-radius: 12px; display: flex; align-items: center; justify-content: center; font-size: 1.5rem; color: #fff; margin-bottom: 16px; background: linear-gradient(135deg, var(--primary), var(--primary-light)); }
.card h3 { font-size: 1.15rem; margin-bottom: 8px; }
.card p { color: var(--text-secondary); font-size: 0.95rem; line-height: 1.7; }
.card .tag-list { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 14px; }
.card .tag {
  padding: 3px 12px; border-radius: 12px; background: var(--primary-bg); color: var(--primary);
  font-size: 0.8rem; font-weight: 500;
}
.card-link { position: absolute; inset: 0; z-index: 1; }

/* ===== 图文区块 ===== */
.feature-row { display: grid; grid-template-columns: 1fr 1fr; gap: 60px; align-items: center; }
.feature-image { border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow-md); }
.feature-image img { width: 100%; height: 400px; object-fit: cover; }
.feature-text h3 { font-size: 1.8rem; margin-bottom: 16px; }
.feature-text p { color: var(--text-secondary); font-size: 1.05rem; line-height: 1.8; margin-bottom: 20px; }
.feature-list { display: flex; flex-direction: column; gap: 12px; }
.feature-list li { display: flex; align-items: flex-start; gap: 12px; color: var(--text-secondary); font-size: 0.98rem; }
.feature-list li i { color: var(--success); margin-top: 4px; font-size: 1rem; flex-shrink: 0; }
.feature-row.reverse { direction: rtl; }
.feature-row.reverse .feature-text { direction: ltr; }
.feature-row.reverse .feature-image { direction: ltr; }

/* ===== 内容列表 ===== */
.content-list { display: flex; flex-direction: column; gap: 16px; }
.content-item {
  display: flex; gap: 20px; padding: 20px 24px; background: var(--bg-card);
  border: 1px solid var(--border); border-radius: var(--radius); transition: var(--transition);
}
.content-item:hover { transform: translateX(4px); box-shadow: var(--shadow); border-color: var(--primary-light); }
.content-item .thumb { width: 160px; height: 110px; border-radius: var(--radius-sm); overflow: hidden; flex-shrink: 0; }
.content-item .thumb img { width: 100%; height: 100%; object-fit: cover; }
.content-item .info { flex: 1; display: flex; flex-direction: column; justify-content: center; }
.content-item .info h3 { font-size: 1.1rem; margin-bottom: 6px; }
.content-item .info h3 a { color: var(--text); }
.content-item .info h3 a:hover { color: var(--primary); }
.content-item .info p { color: var(--text-secondary); font-size: 0.9rem; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.content-item .meta { display: flex; align-items: center; gap: 16px; margin-top: 8px; font-size: 0.82rem; color: var(--text-weak); }
.content-item .meta i { margin-right: 4px; }

/* ===== 数据统计 ===== */
.stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.stat-card {
  text-align: center; padding: 32px 20px; background: var(--bg-card); border: 1px solid var(--border);
  border-radius: var(--radius); transition: var(--transition);
}
.stat-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }
.stat-card .number { font-size: 2.8rem; font-weight: 800; color: var(--primary); line-height: 1.2; }
.stat-card .label { color: var(--text-secondary); font-size: 0.95rem; margin-top: 8px; }
.stat-card .icon { font-size: 2rem; color: var(--accent); margin-bottom: 12px; }

/* ===== FAQ ===== */
.faq-list { max-width: 800px; margin: 0 auto; }
.faq-item { border: 1px solid var(--border); border-radius: var(--radius); margin-bottom: 12px; overflow: hidden; transition: var(--transition); }
.faq-item:hover { border-color: var(--primary-light); }
.faq-question {
  width: 100%; display: flex; justify-content: space-between; align-items: center;
  padding: 18px 24px; background: var(--bg-card); font-size: 1rem; font-weight: 600;
  color: var(--text); text-align: left; transition: var(--transition);
}
.faq-question i { color: var(--text-weak); transition: var(--transition); font-size: 0.9rem; }
.faq-item.active .faq-question { color: var(--primary); }
.faq-item.active .faq-question i { transform: rotate(180deg); color: var(--primary); }
.faq-answer { padding: 0 24px 18px; color: var(--text-secondary); font-size: 0.95rem; line-height: 1.8; display: none; }
.faq-item.active .faq-answer { display: block; }

/* ===== CTA ===== */
.cta-section {
  padding: 80px 0; text-align: center;
  background: linear-gradient(135deg, var(--primary-dark), var(--primary), var(--accent-dark));
  position: relative; overflow: hidden;
}
.cta-section::before { content: ''; position: absolute; inset: 0; background: url('/assets/images/backpic/back-3.png') center/cover no-repeat; opacity: 0.08; mix-blend-mode: overlay; }
.cta-section .container { position: relative; z-index: 2; }
.cta-section h2 { color: #fff; font-size: 2.2rem; margin-bottom: 12px; }
.cta-section p { color: rgba(255,255,255,0.85); font-size: 1.1rem; max-width: 600px; margin: 0 auto 32px; }
.cta-btn-group { display: flex; justify-content: center; gap: 16px; flex-wrap: wrap; }
.cta-btn {
  padding: 14px 36px; border-radius: 30px; font-weight: 600; font-size: 1rem;
  transition: var(--transition); display: inline-flex; align-items: center; gap: 10px;
}
.cta-btn.primary { background: #fff; color: var(--primary); }
.cta-btn.primary:hover { transform: translateY(-3px); box-shadow: 0 8px 30px rgba(0,0,0,0.2); }
.cta-btn.outline { background: transparent; color: #fff; border: 2px solid rgba(255,255,255,0.4); }
.cta-btn.outline:hover { border-color: #fff; background: rgba(255,255,255,0.1); transform: translateY(-3px); }

/* ===== 标签云 ===== */
.tag-cloud { display: flex; flex-wrap: wrap; gap: 10px; justify-content: center; }
.tag-cloud a {
  padding: 8px 20px; border-radius: 20px; background: var(--bg-alt); border: 1px solid var(--border);
  color: var(--text-secondary); font-size: 0.9rem; transition: var(--transition);
}
.tag-cloud a:hover { background: var(--primary); color: #fff; border-color: var(--primary); transform: translateY(-2px); }

/* ===== 页脚 ===== */
.site-footer { background: #0f172a; color: rgba(255,255,255,0.7); padding: 64px 0 0; }
.footer-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr 1fr; gap: 48px; margin-bottom: 40px; }
.footer-brand h3 { color: #fff; font-size: 1.4rem; margin-bottom: 12px; display: flex; align-items: center; gap: 10px; }
.footer-brand h3 i { color: var(--accent); }
.footer-brand p { font-size: 0.9rem; line-height: 1.8; max-width: 320px; }
.footer-col h4 { color: #fff; font-size: 1rem; margin-bottom: 16px; font-weight: 600; }
.footer-col ul li { margin-bottom: 10px; }
.footer-col ul li a { color: rgba(255,255,255,0.6); font-size: 0.9rem; transition: var(--transition); display: inline-flex; align-items: center; gap: 6px; }
.footer-col ul li a:hover { color: var(--accent); transform: translateX(4px); }
.footer-bottom { border-top: 1px solid rgba(255,255,255,0.08); padding: 20px 0; display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 12px; font-size: 0.85rem; }
.footer-bottom a { color: var(--accent-light); }
.footer-bottom a:hover { color: #fff; }

/* ===== 响应式 ===== */
@media (max-width: 1024px) {
  .card-grid-4 { grid-template-columns: repeat(2, 1fr); }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .feature-row { gap: 40px; }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
  h1 { font-size: 2.2rem; }
  .hero-content h1 { font-size: 2.2rem; }
}

@media (max-width: 768px) {
  :root { --spacing-section: 48px; --nav-height: 64px; }
  .mobile-toggle { display: block; }
  .nav-list { display: none; flex-direction: column; position: absolute; top: var(--nav-height); left: 0; right: 0; background: rgba(255,255,255,0.98); backdrop-filter: blur(12px); border-bottom: 1px solid var(--border); padding: 16px 24px; box-shadow: var(--shadow-md); }
  .nav-list.open { display: flex; }
  .nav-list li a { padding: 12px 16px; border-radius: var(--radius-sm); }
  .header-search input { width: 140px; }
  .header-search input:focus { width: 180px; }
  .header-cta { padding: 8px 18px; font-size: 0.85rem; }
  .card-grid-3, .card-grid-4, .card-grid-2 { grid-template-columns: 1fr; }
  .feature-row { grid-template-columns: 1fr; gap: 32px; }
  .feature-row.reverse { direction: ltr; }
  .feature-image img { height: 260px; }
  .content-item { flex-direction: column; }
  .content-item .thumb { width: 100%; height: 180px; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 16px; }
  .stat-card .number { font-size: 2rem; }
  .footer-grid { grid-template-columns: 1fr; gap: 24px; }
  .footer-bottom { flex-direction: column; text-align: center; }
  .hero-content h1 { font-size: 1.8rem; }
  .page-hero { padding: 56px 0 48px; min-height: 240px; }
  .cta-section h2 { font-size: 1.6rem; }
  .section-title { margin-bottom: 32px; }
  .section-title h2 { font-size: 1.6rem; }
}

@media (max-width: 520px) {
  .container { padding: 0 16px; }
  .header-inner { padding: 0 16px; }
  .header-search { display: none; }
  .header-cta { padding: 8px 16px; font-size: 0.8rem; }
  .hero-content h1 { font-size: 1.5rem; }
  .stats-grid { grid-template-columns: 1fr 1fr; gap: 12px; }
  .stat-card { padding: 20px 12px; }
  .stat-card .number { font-size: 1.6rem; }
  .faq-question { padding: 14px 16px; font-size: 0.9rem; }
  .cta-btn { padding: 12px 24px; font-size: 0.9rem; }
}