/* roulang page: index */
:root {
            --primary: #6d5efc;
            --primary-dark: #5a4ce0;
            --primary-light: #efeefd;
            --accent: #ff7a59;
            --bg: #f5f6fb;
            --bg-deep: #0f1222;
            --surface: #ffffff;
            --text: #1a1d2e;
            --text-weak: #6b7280;
            --border: #e8eaf1;
            --radius: 16px;
            --radius-sm: 10px;
            --shadow: 0 10px 40px rgba(26, 29, 46, 0.06);
            --shadow-hover: 0 20px 50px rgba(26, 29, 46, 0.12);
            --sidebar-w: 240px;
            --transition: 0.2s ease;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: "Inter", "PingFang SC", "Microsoft YaHei", system-ui, -apple-system, sans-serif;
            background: var(--bg);
            color: var(--text);
            line-height: 1.7;
            font-size: 16px;
            min-height: 100vh;
        }

        a {
            color: var(--primary);
            text-decoration: none;
            transition: color var(--transition);
        }

        a:hover {
            color: var(--primary-dark);
        }

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

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

        input,
        textarea {
            font-family: inherit;
            font-size: 14px;
        }

        .app-shell {
            display: flex;
            min-height: 100vh;
        }

        .app-sidebar {
            width: var(--sidebar-w);
            background: var(--bg-deep);
            color: rgba(255, 255, 255, 0.75);
            padding: 28px 18px 28px 24px;
            position: fixed;
            top: 0;
            left: 0;
            bottom: 0;
            z-index: 1000;
            display: flex;
            flex-direction: column;
            transition: transform 0.3s ease;
            overflow-y: auto;
        }

        .sidebar-logo {
            display: flex;
            align-items: center;
            gap: 12px;
            font-size: 19px;
            color: #fff;
            font-weight: 700;
            padding: 6px 8px 24px;
            letter-spacing: 0.5px;
        }

        .sidebar-logo i {
            color: var(--accent);
            font-size: 22px;
        }

        .sidebar-logo span {
            font-size: 16px;
            line-height: 1.3;
            white-space: nowrap;
        }

        .sidebar-nav {
            flex: 1;
            display: flex;
            flex-direction: column;
            gap: 6px;
            margin-top: 12px;
        }

        .sidebar-nav a {
            display: flex;
            align-items: center;
            gap: 12px;
            color: rgba(255, 255, 255, 0.6);
            font-size: 15px;
            font-weight: 500;
            padding: 12px 14px;
            border-radius: 12px;
            transition: all 0.2s ease;
        }

        .sidebar-nav a i {
            width: 20px;
            text-align: center;
            font-size: 16px;
        }

        .sidebar-nav a:hover {
            background: rgba(255, 255, 255, 0.06);
            color: #fff;
        }

        .sidebar-nav a.active {
            background: rgba(109, 94, 252, 0.25);
            color: #fff;
            box-shadow: inset 3px 0 0 var(--primary);
        }

        .sidebar-footer {
            padding: 18px 10px 0;
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            font-size: 12px;
            color: rgba(255, 255, 255, 0.35);
            line-height: 1.6;
        }

        .main-area {
            flex: 1;
            margin-left: var(--sidebar-w);
            min-width: 0;
            display: flex;
            flex-direction: column;
        }

        .topbar {
            display: none;
            align-items: center;
            justify-content: space-between;
            background: var(--bg-deep);
            color: #fff;
            padding: 0 20px;
            height: 60px;
            position: sticky;
            top: 0;
            z-index: 999;
        }

        .topbar-logo {
            font-size: 16px;
            font-weight: 700;
            color: #fff;
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .burger {
            background: transparent;
            color: #fff;
            font-size: 22px;
            width: 42px;
            height: 42px;
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
        }

        .container {
            max-width: 1280px;
            margin: 0 auto;
            padding-left: 28px;
            padding-right: 28px;
        }

        .content-wrapper {
            width: 100%;
        }

        /* Hero */
        .hero {
            position: relative;
            background: linear-gradient(135deg, #101023 0%, #1c1f3a 60%, #2d2350 100%);
            color: #fff;
            padding: 92px 0 120px;
            overflow: hidden;
            border-bottom-left-radius: 48px;
            border-bottom-right-radius: 48px;
        }

        .hero::before {
            content: "";
            position: absolute;
            inset: 0;
            background-image: url('/assets/images/backpic/back-1.png');
            background-size: cover;
            background-position: center;
            opacity: 0.18;
        }

        .hero::after {
            content: "";
            position: absolute;
            top: -100px;
            right: -60px;
            width: 360px;
            height: 360px;
            background: radial-gradient(circle, rgba(109, 94, 252, 0.25) 0%, transparent 70%);
            border-radius: 50%;
        }

        .hero-inner {
            position: relative;
            z-index: 2;
            display: grid;
            grid-template-columns: 1.1fr 0.9fr;
            gap: 60px;
            align-items: center;
        }

        .hero-copy h1 {
            font-size: 52px;
            line-height: 1.2;
            font-weight: 800;
            letter-spacing: -1px;
            margin-bottom: 18px;
        }

        .hero-copy h1 span {
            background: linear-gradient(120deg, #a78bfa, #f0abfc);
            -webkit-background-clip: text;
            background-clip: text;
            color: transparent;
        }

        .hero-sub {
            font-size: 17px;
            color: rgba(255, 255, 255, 0.7);
            max-width: 460px;
            margin-bottom: 32px;
        }

        .hero-badges {
            display: flex;
            gap: 10px;
            flex-wrap: wrap;
            margin-bottom: 32px;
        }

        .hero-badge {
            background: rgba(255, 255, 255, 0.1);
            border: 1px solid rgba(255, 255, 255, 0.18);
            padding: 7px 18px;
            border-radius: 30px;
            font-size: 13px;
            font-weight: 500;
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }

        .hero-badge i {
            color: #a78bfa;
        }

        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: var(--primary);
            color: #fff;
            padding: 14px 28px;
            border-radius: 30px;
            font-size: 15px;
            font-weight: 600;
            transition: all 0.25s ease;
            box-shadow: 0 8px 24px rgba(109, 94, 252, 0.28);
        }

        .btn-primary:hover {
            background: var(--primary-dark);
            transform: translateY(-2px);
            box-shadow: 0 14px 30px rgba(109, 94, 252, 0.38);
            color: #fff;
        }

        .btn-ghost {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(255, 255, 255, 0.08);
            border: 1px solid rgba(255, 255, 255, 0.2);
            color: #fff;
            padding: 14px 26px;
            border-radius: 30px;
            font-size: 15px;
            font-weight: 600;
            transition: all 0.25s ease;
            margin-left: 12px;
        }

        .btn-ghost:hover {
            background: rgba(255, 255, 255, 0.15);
            color: #fff;
            transform: translateY(-2px);
        }

        .hero-visual {
            position: relative;
        }

        .hero-card-stack {
            background: rgba(255, 255, 255, 0.06);
            border: 1px solid rgba(255, 255, 255, 0.12);
            border-radius: 20px;
            padding: 28px;
            backdrop-filter: blur(14px);
            box-shadow: 0 24px 60px rgba(0, 0, 0, 0.2);
        }

        .hero-card-head {
            display: flex;
            align-items: center;
            justify-content: space-between;
            margin-bottom: 22px;
        }

        .hero-card-head span {
            font-weight: 600;
            font-size: 14px;
            letter-spacing: 0.5px;
        }

        .hero-card-status {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 12px;
            color: #a7f3d0;
            background: rgba(16, 185, 129, 0.15);
            padding: 4px 14px;
            border-radius: 30px;
        }

        .hero-card-status::before {
            content: "";
            width: 6px;
            height: 6px;
            background: #10b981;
            border-radius: 50%;
        }

        .hero-list-item {
            display: flex;
            align-items: center;
            gap: 14px;
            padding: 12px 0;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        }

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

        .hero-list-dot {
            width: 38px;
            height: 38px;
            border-radius: 10px;
            background: rgba(109, 94, 252, 0.25);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 14px;
            color: #c9c2ff;
        }

        .hero-list-text {
            flex: 1;
        }

        .hero-list-text h4 {
            font-size: 13px;
            font-weight: 600;
            color: rgba(255, 255, 255, 0.92);
            margin-bottom: 2px;
        }

        .hero-list-text p {
            font-size: 11px;
            color: rgba(255, 255, 255, 0.45);
        }

        .hero-list-arrow {
            color: rgba(255, 255, 255, 0.3);
            font-size: 14px;
        }

        /* Section common */
        .section {
            padding: 90px 0;
        }

        .section-alt {
            background: var(--surface);
            border-radius: 32px;
            margin: 16px 28px;
            padding: 90px 40px;
            box-shadow: var(--shadow);
        }

        .section-tag {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: var(--primary-light);
            color: var(--primary);
            padding: 7px 16px;
            border-radius: 30px;
            font-size: 13px;
            font-weight: 600;
            margin-bottom: 16px;
        }

        .section-title {
            font-size: 38px;
            font-weight: 800;
            line-height: 1.25;
            letter-spacing: -0.5px;
            margin-bottom: 14px;
        }

        .section-desc {
            font-size: 16px;
            color: var(--text-weak);
            max-width: 560px;
            margin-bottom: 44px;
        }

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

        .section-head-center .section-desc {
            margin-left: auto;
            margin-right: auto;
        }

        /* Feature cards */
        .feature-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

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

        .feature-card::before {
            content: "";
            position: absolute;
            top: 0;
            left: 0;
            width: 3px;
            height: 0;
            background: var(--primary);
            transition: height 0.3s ease;
        }

        .feature-card:hover::before {
            height: 100%;
        }

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

        .feature-icon {
            width: 52px;
            height: 52px;
            background: var(--primary-light);
            border-radius: 14px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--primary);
            font-size: 20px;
            margin-bottom: 20px;
        }

        .feature-card h3 {
            font-size: 19px;
            font-weight: 700;
            margin-bottom: 10px;
        }

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

        /* Category cards */
        .category-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }

        .category-card {
            background: var(--surface);
            border-radius: var(--radius);
            overflow: hidden;
            box-shadow: var(--shadow);
            transition: transform 0.3s ease, box-shadow 0.3s ease;
            display: flex;
            flex-direction: column;
        }

        .category-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-hover);
        }

        .category-card-img {
            height: 200px;
            overflow: hidden;
            position: relative;
        }

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

        .category-card:hover .category-card-img img {
            transform: scale(1.05);
        }

        .category-card-img::after {
            content: "";
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, transparent 50%, rgba(15, 18, 34, 0.4) 100%);
        }

        .category-card-body {
            padding: 24px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }

        .category-card-body h3 {
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 8px;
        }

        .category-card-body p {
            font-size: 14px;
            color: var(--text-weak);
            line-height: 1.6;
            margin-bottom: 16px;
            flex: 1;
        }

        .category-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 14px;
            font-weight: 600;
        }

        /* Content list */
        .content-section {
            background: var(--surface);
            border-radius: 32px;
            margin: 16px 28px;
            padding: 70px 40px;
            box-shadow: var(--shadow);
        }

        .content-list {
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

        .content-item {
            display: flex;
            align-items: center;
            gap: 20px;
            padding: 22px 24px;
            border: 1px solid var(--border);
            border-radius: var(--radius-sm);
            transition: all 0.25s ease;
            background: #fff;
        }

        .content-item:hover {
            border-color: var(--primary);
            transform: translateX(6px);
            box-shadow: 0 8px 24px rgba(109, 94, 252, 0.08);
        }

        .content-item-date {
            font-size: 13px;
            color: var(--text-weak);
            white-space: nowrap;
            background: var(--bg);
            padding: 6px 14px;
            border-radius: 8px;
            display: flex;
            align-items: center;
            gap: 6px;
        }

        .content-item-main {
            flex: 1;
            min-width: 0;
        }

        .content-item-main h4 {
            font-size: 16px;
            font-weight: 600;
            margin-bottom: 4px;
            overflow: hidden;
            text-overflow: ellipsis;
            white-space: nowrap;
        }

        .content-item-main p {
            font-size: 13px;
            color: var(--text-weak);
            overflow: hidden;
            text-overflow: ellipsis;
            display: -webkit-box;
            -webkit-line-clamp: 1;
            -webkit-box-orient: vertical;
        }

        .content-item-cat {
            font-size: 13px;
            background: var(--primary-light);
            color: var(--primary);
            padding: 5px 12px;
            border-radius: 20px;
            white-space: nowrap;
            font-weight: 500;
        }

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

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

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

        .stat-num {
            font-size: 36px;
            font-weight: 800;
            color: var(--primary);
            line-height: 1.2;
            margin-bottom: 6px;
        }

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

        /* Process */
        .process-section {
            background: var(--bg-deep);
            color: #fff;
            border-radius: 32px;
            margin: 16px 28px;
            padding: 80px 40px;
            position: relative;
            overflow: hidden;
        }

        .process-section::before {
            content: "";
            position: absolute;
            inset: 0;
            background-image: url('/assets/images/backpic/back-2.png');
            background-size: cover;
            background-position: center;
            opacity: 0.1;
        }

        .process-grid {
            position: relative;
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 40px;
            margin-top: 20px;
        }

        .process-step {
            position: relative;
            padding: 30px;
            background: rgba(255, 255, 255, 0.04);
            border-radius: 16px;
            border-top: 2px solid var(--primary);
        }

        .process-num {
            font-size: 28px;
            font-weight: 800;
            background: linear-gradient(120deg, #a78bfa, #f0abfc);
            -webkit-background-clip: text;
            background-clip: text;
            color: transparent;
            margin-bottom: 14px;
        }

        .process-step h4 {
            font-size: 17px;
            margin-bottom: 8px;
        }

        .process-step p {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.55);
            line-height: 1.65;
        }

        /* FAQ */
        .faq-list {
            max-width: 820px;
            margin: 0 auto;
        }

        .faq-item {
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: var(--radius-sm);
            margin-bottom: 14px;
            overflow: hidden;
            transition: border-color 0.25s ease;
        }

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

        .faq-q {
            display: flex;
            justify-content: space-between;
            align-items: center;
            gap: 16px;
            padding: 20px 26px;
            cursor: pointer;
            font-weight: 600;
            font-size: 15px;
            background: transparent;
            width: 100%;
            color: var(--text);
            text-align: left;
        }

        .faq-q i {
            color: var(--primary);
            font-size: 14px;
            transition: transform 0.3s ease;
        }

        .faq-item.open .faq-q i {
            transform: rotate(180deg);
        }

        .faq-a {
            display: none;
            padding: 0 26px 22px;
            color: var(--text-weak);
            font-size: 14px;
            line-height: 1.7;
        }

        .faq-item.open .faq-a {
            display: block;
        }

        /* CTA */
        .cta-section {
            padding: 60px 28px;
        }

        .cta-box {
            background: linear-gradient(135deg, #1a1d3e 0%, #2d2350 100%);
            border-radius: 30px;
            padding: 60px 40px;
            text-align: center;
            color: #fff;
            position: relative;
            overflow: hidden;
        }

        .cta-box::before {
            content: "";
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background-image: url('/assets/images/backpic/back-3.png');
            background-size: cover;
            background-position: center;
            opacity: 0.12;
        }

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

        .cta-box p {
            position: relative;
            max-width: 520px;
            margin: 0 auto 28px;
            color: rgba(255, 255, 255, 0.7);
        }

        .cta-btn {
            position: relative;
        }

        /* Footer */
        .app-footer {
            background: var(--bg-deep);
            color: rgba(255, 255, 255, 0.65);
            padding: 50px 28px 30px;
        }

        .footer-inner {
            max-width: 1280px;
            margin: 0 auto;
            display: flex;
            gap: 60px;
            justify-content: space-between;
            flex-wrap: wrap;
        }

        .footer-brand {
            flex: 1;
            min-width: 240px;
        }

        .footer-brand h3 {
            font-size: 18px;
            color: #fff;
            margin-bottom: 10px;
        }

        .footer-brand p {
            font-size: 13px;
            max-width: 320px;
            line-height: 1.7;
            color: rgba(255, 255, 255, 0.45);
        }

        .footer-col {
            min-width: 140px;
        }

        .footer-col h4 {
            font-size: 14px;
            color: #fff;
            margin-bottom: 16px;
        }

        .footer-col a {
            display: block;
            font-size: 13px;
            color: rgba(255, 255, 255, 0.5);
            padding: 5px 0;
            transition: color 0.2s ease;
        }

        .footer-col a:hover {
            color: var(--primary);
        }

        .footer-bottom {
            max-width: 1280px;
            margin: 40px auto 0;
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            padding-top: 24px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            gap: 16px;
            flex-wrap: wrap;
            font-size: 13px;
            color: rgba(255, 255, 255, 0.35);
        }

        /* Sidebar overlay */
        .sidebar-overlay {
            display: none;
            position: fixed;
            inset: 0;
            background: rgba(0, 0, 0, 0.5);
            z-index: 998;
        }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .hero-inner {
                grid-template-columns: 1fr;
                gap: 40px;
            }

            .hero {
                padding: 60px 0 80px;
            }

            .hero-copy h1 {
                font-size: 36px;
            }

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

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

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

            .process-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }
        }

        @media (max-width: 768px) {
            .app-sidebar {
                transform: translateX(-100%);
                width: 280px;
            }

            .app-sidebar.open {
                transform: translateX(0);
            }

            .main-area {
                margin-left: 0;
            }

            .topbar {
                display: flex;
            }

            .sidebar-overlay.show {
                display: block;
            }

            .hero {
                border-radius: 0 0 24px 24px;
                padding: 40px 0 60px;
            }

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

            .section {
                padding: 50px 0;
            }

            .section-title {
                font-size: 26px;
            }

            .section-alt,
            .content-section,
            .process-section {
                margin: 10px 14px;
                padding: 40px 20px;
                border-radius: 20px;
            }

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

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

            .content-item {
                flex-direction: column;
                align-items: flex-start;
                gap: 10px;
            }

            .content-item-cat {
                align-self: flex-start;
            }

            .container {
                padding-left: 18px;
                padding-right: 18px;
            }

            .cta-box {
                padding: 36px 20px;
            }

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

            .btn-ghost {
                margin-left: 0;
                margin-top: 12px;
            }

            .footer-inner {
                flex-direction: column;
                gap: 36px;
            }

            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
        }

        @media (max-width: 520px) {
            .stats-grid {
                grid-template-columns: 1fr;
            }

            .content-item-main h4 {
                font-size: 15px;
            }

            .hero-badge {
                font-size: 12px;
                padding: 5px 12px;
            }

            .section-desc {
                font-size: 14px;
            }

            .category-card-img {
                height: 160px;
            }

            .process-step {
                padding: 20px;
            }

            .process-grid {
                gap: 14px;
            }

            .cta-box {
                padding: 28px 16px;
            }
        }

        @media (max-width: 360px) {
            .hero-card-stack {
                padding: 18px;
            }
        }

/* roulang page: category1 */
:root {
            --primary: #2563eb;
            --primary-dark: #1e40af;
            --accent: #f59e0b;
            --accent-light: #fef3c7;
            --bg: #f8fafc;
            --surface: #ffffff;
            --text: #1e293b;
            --text-light: #64748b;
            --border: #e2e8f0;
            --radius: 16px;
            --radius-sm: 10px;
            --shadow: 0 8px 30px rgba(15, 23, 42, 0.08);
            --shadow-lg: 0 20px 50px rgba(15, 23, 42, 0.14);
            --transition: 0.3s ease;
            --sidebar-w: 260px;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
            background: var(--bg);
            color: var(--text);
            line-height: 1.7;
            -webkit-font-smoothing: antialiased;
        }

        a {
            text-decoration: none;
            color: inherit;
            transition: color var(--transition);
        }

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

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

        ul,
        ol {
            list-style: none;
        }

        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
        }

        /* ========== 左侧导航 ========== */
        .app-shell {
            min-height: 100vh;
        }

        .sidebar {
            position: fixed;
            top: 0;
            left: 0;
            bottom: 0;
            width: var(--sidebar-w);
            background: #0f172a;
            z-index: 1000;
            display: flex;
            flex-direction: column;
            padding: 28px 16px 20px;
            transition: transform 0.35s ease;
        }

        .sidebar-logo {
            padding: 0 12px 22px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
            margin-bottom: 18px;
        }

        .sidebar-logo a {
            display: flex;
            align-items: center;
            gap: 10px;
            color: #ffffff;
            font-size: 18px;
            font-weight: 700;
            letter-spacing: 0.5px;
            line-height: 1.4;
        }

        .sidebar-logo i {
            color: var(--accent);
            font-size: 22px;
        }

        .sidebar-nav {
            display: flex;
            flex-direction: column;
            gap: 6px;
        }

        .sidebar-nav a {
            display: flex;
            align-items: center;
            gap: 12px;
            color: #94a3b8;
            padding: 13px 14px;
            border-radius: var(--radius-sm);
            font-size: 15px;
            font-weight: 500;
            transition: all var(--transition);
            position: relative;
        }

        .sidebar-nav a i {
            width: 20px;
            text-align: center;
            font-size: 16px;
        }

        .sidebar-nav a:hover {
            background: rgba(255, 255, 255, 0.06);
            color: #ffffff;
        }

        .sidebar-nav a:focus-visible {
            outline: 2px solid var(--accent);
            outline-offset: 2px;
        }

        .sidebar-nav a.active {
            background: linear-gradient(135deg, rgba(245, 158, 11, 0.2), rgba(245, 158, 11, 0.04));
            color: var(--accent);
            font-weight: 600;
            box-shadow: inset 0 0 0 1px rgba(245, 158, 11, 0.22);
        }

        .sidebar-foot {
            margin-top: auto;
            padding: 18px 12px 0;
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            color: #475569;
            font-size: 13px;
            letter-spacing: 0.3px;
        }

        .sidebar-overlay {
            position: fixed;
            inset: 0;
            background: rgba(15, 23, 42, 0.55);
            z-index: 999;
            opacity: 0;
            visibility: hidden;
            transition: all 0.3s ease;
            backdrop-filter: blur(2px);
        }

        .sidebar-overlay.show {
            opacity: 1;
            visibility: visible;
        }

        /* ========== 主内容 ========== */
        .main-wrap {
            margin-left: var(--sidebar-w);
            min-height: 100vh;
            display: flex;
            flex-direction: column;
        }

        .main-content {
            flex: 1;
        }

        .mobile-header {
            display: none;
            position: sticky;
            top: 0;
            z-index: 900;
            background: #0f172a;
            padding: 14px 20px;
            align-items: center;
            justify-content: space-between;
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.2);
        }

        .menu-btn {
            background: transparent;
            color: #fff;
            font-size: 20px;
            padding: 8px 12px;
            border-radius: 8px;
            cursor: pointer;
            transition: background 0.3s;
        }

        .menu-btn:hover {
            background: rgba(255, 255, 255, 0.1);
        }

        .menu-btn:focus-visible {
            outline: 2px solid var(--accent);
        }

        .mobile-logo {
            color: #fff;
            font-size: 16px;
            font-weight: 700;
        }

        /* ========== 页面 Hero ========== */
        .page-hero {
            position: relative;
            padding: 90px 0 80px;
            background: linear-gradient(135deg, rgba(15, 23, 42, 0.94), rgba(30, 64, 175, 0.78)), url('/assets/images/backpic/back-1.png') center / cover no-repeat;
            color: #fff;
            overflow: hidden;
        }

        .page-hero::after {
            content: '';
            position: absolute;
            bottom: -40px;
            right: -20px;
            width: 320px;
            height: 320px;
            border-radius: 50%;
            background: rgba(245, 158, 11, 0.08);
            pointer-events: none;
        }

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

        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 14px;
            color: rgba(255, 255, 255, 0.7);
            margin-bottom: 24px;
            letter-spacing: 0.3px;
        }

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

        .breadcrumb span {
            opacity: 0.5;
        }

        .page-hero h1 {
            font-size: 44px;
            line-height: 1.25;
            font-weight: 800;
            margin-bottom: 16px;
            letter-spacing: 1px;
        }

        .page-hero p {
            font-size: 17px;
            color: rgba(255, 255, 255, 0.85);
            max-width: 640px;
            margin-bottom: 28px;
            line-height: 1.8;
        }

        .page-hero-badges {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
        }

        .badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(255, 255, 255, 0.12);
            backdrop-filter: blur(4px);
            border: 1px solid rgba(255, 255, 255, 0.18);
            color: #fff;
            font-size: 14px;
            padding: 8px 18px;
            border-radius: 100px;
            font-weight: 500;
            transition: all var(--transition);
        }

        .badge:hover {
            background: rgba(255, 255, 255, 0.2);
            border-color: var(--accent);
        }

        .badge i {
            color: var(--accent);
        }

        /* ========== 板块通用 ========== */
        .section {
            padding: 80px 0;
        }

        .section-gray {
            background: #f1f5f9;
        }

        .section-dark {
            background: #0f172a;
            color: #fff;
        }

        .section-head {
            text-align: center;
            max-width: 660px;
            margin: 0 auto 52px;
        }

        .section-tag {
            display: inline-block;
            background: var(--accent-light);
            color: #b45309;
            font-size: 13px;
            font-weight: 600;
            padding: 6px 16px;
            border-radius: 100px;
            letter-spacing: 0.5px;
            margin-bottom: 14px;
            text-transform: uppercase;
        }

        .section-head h2 {
            font-size: 34px;
            line-height: 1.3;
            font-weight: 700;
            margin-bottom: 14px;
            color: var(--text);
            letter-spacing: 0.5px;
        }

        .section-head p {
            font-size: 16px;
            color: var(--text-light);
            line-height: 1.8;
        }

        /* ========== 入口卡片 ========== */
        .entry-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }

        .entry-card {
            background: var(--surface);
            border-radius: var(--radius);
            overflow: hidden;
            box-shadow: var(--shadow);
            transition: transform var(--transition), box-shadow var(--transition);
            border: 1px solid var(--border);
            display: flex;
            flex-direction: column;
        }

        .entry-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-lg);
        }

        .entry-cover {
            height: 200px;
            overflow: hidden;
            position: relative;
        }

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

        .entry-card:hover .entry-cover img {
            transform: scale(1.05);
        }

        .entry-cover::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(to top, rgba(15, 23, 42, 0.25), transparent 60%);
        }

        .entry-body {
            padding: 26px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }

        .entry-cat {
            display: inline-block;
            background: #eff6ff;
            color: var(--primary);
            font-size: 13px;
            font-weight: 600;
            padding: 5px 14px;
            border-radius: 100px;
            margin-bottom: 14px;
            align-self: flex-start;
        }

        .entry-body h3 {
            font-size: 21px;
            font-weight: 700;
            margin-bottom: 10px;
            color: var(--text);
            line-height: 1.4;
        }

        .entry-body p {
            font-size: 15px;
            color: var(--text-light);
            line-height: 1.75;
            flex: 1;
        }

        .text-link {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            color: var(--primary);
            font-weight: 600;
            font-size: 15px;
            margin-top: 18px;
            transition: gap var(--transition), color var(--transition);
        }

        .text-link:hover {
            gap: 12px;
            color: var(--primary-dark);
        }

        /* ========== 文章列表 ========== */
        .post-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }

        .post-card {
            background: var(--surface);
            border-radius: var(--radius);
            overflow: hidden;
            box-shadow: var(--shadow);
            border: 1px solid var(--border);
            transition: transform var(--transition), box-shadow var(--transition);
            display: flex;
            flex-direction: column;
        }

        .post-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-lg);
        }

        .post-cover {
            height: 180px;
            overflow: hidden;
        }

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

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

        .post-body {
            padding: 24px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }

        .post-meta {
            display: flex;
            align-items: center;
            justify-content: space-between;
            margin-bottom: 12px;
        }

        .post-cat {
            background: #fff7ed;
            color: #c2410c;
            font-size: 12px;
            font-weight: 600;
            padding: 4px 12px;
            border-radius: 100px;
        }

        .post-date {
            font-size: 13px;
            color: var(--text-light);
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }

        .post-body h3 {
            font-size: 18px;
            line-height: 1.5;
            font-weight: 700;
            color: var(--text);
            margin-bottom: 10px;
            transition: color var(--transition);
        }

        .post-card:hover .post-body h3 {
            color: var(--primary);
        }

        .post-body p {
            font-size: 14px;
            color: var(--text-light);
            line-height: 1.7;
            flex: 1;
        }

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

        .step-item {
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            padding: 32px 24px;
            position: relative;
            transition: all var(--transition);
            box-shadow: var(--shadow);
        }

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

        .step-item::before {
            counter-increment: step;
            content: counter(step, decimal-leading-zero);
            position: absolute;
            top: 20px;
            right: 20px;
            font-size: 36px;
            font-weight: 800;
            color: #e2e8f0;
            line-height: 1;
            transition: color var(--transition);
        }

        .step-item:hover::before {
            color: var(--accent);
        }

        .step-icon {
            width: 56px;
            height: 56px;
            border-radius: 14px;
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 22px;
            margin-bottom: 20px;
            box-shadow: 0 6px 16px rgba(37, 99, 235, 0.3);
        }

        .step-info h3 {
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 8px;
            color: var(--text);
        }

        .step-info p {
            font-size: 14px;
            color: var(--text-light);
            line-height: 1.7;
        }

        /* ========== 数据统计 ========== */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 28px;
            text-align: center;
        }

        .stat-card {
            background: rgba(255, 255, 255, 0.05);
            border: 1px solid rgba(255, 255, 255, 0.1);
            border-radius: var(--radius);
            padding: 40px 24px;
            transition: all var(--transition);
        }

        .stat-card:hover {
            background: rgba(255, 255, 255, 0.1);
            transform: translateY(-4px);
            border-color: rgba(245, 158, 11, 0.4);
        }

        .stat-num {
            font-size: 44px;
            font-weight: 800;
            color: var(--accent);
            line-height: 1.2;
            margin-bottom: 8px;
            letter-spacing: 1px;
        }

        .stat-label {
            font-size: 15px;
            color: rgba(255, 255, 255, 0.7);
            letter-spacing: 0.5px;
        }

        /* ========== FAQ ========== */
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
            display: grid;
            gap: 16px;
        }

        .faq-item {
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            overflow: hidden;
            transition: all var(--transition);
            box-shadow: 0 2px 10px rgba(15, 23, 42, 0.03);
        }

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

        .faq-item summary {
            padding: 22px 28px;
            font-size: 16px;
            font-weight: 600;
            color: var(--text);
            cursor: pointer;
            list-style: none;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            position: relative;
            transition: color var(--transition);
        }

        .faq-item summary::-webkit-details-marker {
            display: none;
        }

        .faq-item summary::after {
            content: '\f078';
            font-family: 'Font Awesome 6 Free';
            font-weight: 900;
            font-size: 14px;
            color: var(--text-light);
            transition: transform 0.3s ease, color 0.3s ease;
            flex-shrink: 0;
        }

        .faq-item[open] summary {
            color: var(--primary);
        }

        .faq-item[open] summary::after {
            transform: rotate(180deg);
            color: var(--primary);
        }

        .faq-a {
            padding: 0 28px 24px;
            color: var(--text-light);
            font-size: 15px;
            line-height: 1.8;
        }

        .faq-a p {
            margin-top: 4px;
        }

        /* ========== CTA ========== */
        .cta-box {
            background: linear-gradient(135deg, #1e3a8a, #0f172a);
            border-radius: 24px;
            padding: 56px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 40px;
            position: relative;
            overflow: hidden;
            box-shadow: var(--shadow-lg);
        }

        .cta-box::before {
            content: '';
            position: absolute;
            top: -60px;
            right: -60px;
            width: 180px;
            height: 180px;
            border-radius: 50%;
            background: rgba(245, 158, 11, 0.12);
        }

        .cta-content h2 {
            color: #fff;
            font-size: 28px;
            font-weight: 700;
            margin-bottom: 12px;
            line-height: 1.4;
        }

        .cta-content p {
            color: rgba(255, 255, 255, 0.75);
            font-size: 16px;
            max-width: 500px;
            line-height: 1.7;
        }

        .cta-actions {
            display: flex;
            gap: 14px;
            flex-shrink: 0;
            flex-wrap: wrap;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 14px 30px;
            border-radius: 12px;
            font-size: 15px;
            font-weight: 600;
            transition: all var(--transition);
            cursor: pointer;
            border: 2px solid transparent;
            line-height: 1.2;
            justify-content: center;
        }

        .btn:focus-visible {
            outline: 3px solid var(--accent);
            outline-offset: 2px;
        }

        .btn-primary {
            background: var(--accent);
            color: #0f172a;
            border-color: var(--accent);
            box-shadow: 0 6px 18px rgba(245, 158, 11, 0.3);
        }

        .btn-primary:hover {
            background: #d97706;
            border-color: #d97706;
            transform: translateY(-2px);
            box-shadow: 0 10px 24px rgba(245, 158, 11, 0.4);
        }

        .btn-ghost {
            background: transparent;
            color: #fff;
            border-color: rgba(255, 255, 255, 0.3);
        }

        .btn-ghost:hover {
            background: rgba(255, 255, 255, 0.1);
            border-color: rgba(255, 255, 255, 0.5);
            transform: translateY(-2px);
        }

        /* ========== 页脚 ========== */
        .app-footer {
            background: #0f172a;
            color: #94a3b8;
            padding: 56px 0 24px;
            --primary: #60a5fa;
        }

        .footer-inner {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr;
            gap: 44px;
            padding-bottom: 40px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        }

        .footer-brand h3 {
            color: #fff;
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 12px;
            display: flex;
            align-items: center;
        }

        .footer-brand p {
            font-size: 14px;
            line-height: 1.8;
            max-width: 360px;
            color: #94a3b8;
        }

        .footer-col h4 {
            color: #fff;
            font-size: 15px;
            font-weight: 600;
            margin-bottom: 16px;
            letter-spacing: 0.5px;
            position: relative;
            padding-bottom: 10px;
        }

        .footer-col h4::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 24px;
            height: 2px;
            background: var(--accent);
            border-radius: 2px;
        }

        .footer-col a {
            display: block;
            color: #94a3b8;
            font-size: 14px;
            padding: 7px 0;
            transition: all var(--transition);
        }

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

        .footer-col a:focus-visible {
            outline: 2px solid var(--accent);
            outline-offset: 2px;
            border-radius: 4px;
        }

        .footer-bottom {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding-top: 24px;
            font-size: 13px;
            color: #475569;
            flex-wrap: wrap;
            gap: 10px;
        }

        /* ========== 响应式 ========== */
        @media (max-width: 1024px) {
            .sidebar {
                transform: translateX(-100%);
            }

            .sidebar.open {
                transform: translateX(0);
            }

            .main-wrap {
                margin-left: 0;
            }

            .mobile-header {
                display: flex;
            }

            .mobile-logo {
                display: flex;
                align-items: center;
                gap: 8px;
            }

            .mobile-logo i {
                color: var(--accent);
            }

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

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

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

            .cta-box {
                flex-direction: column;
                text-align: center;
                padding: 48px 32px;
            }

            .cta-content p {
                margin: 0 auto;
            }
        }

        @media (max-width: 768px) {
            .section {
                padding: 60px 0;
            }

            .page-hero {
                padding: 60px 0 56px;
            }

            .page-hero h1 {
                font-size: 32px;
            }

            .page-hero p {
                font-size: 15px;
            }

            .section-head h2 {
                font-size: 26px;
            }

            .section-head p {
                font-size: 15px;
            }

            .entry-grid,
            .post-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }

            .entry-cover,
            .post-cover {
                height: 210px;
            }

            .steps {
                grid-template-columns: 1fr;
                gap: 16px;
            }

            .footer-inner {
                grid-template-columns: 1fr;
                gap: 32px;
            }

            .cta-box {
                padding: 40px 24px;
            }

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

            .cta-actions {
                justify-content: center;
            }

            .btn {
                width: 100%;
            }
        }

        @media (max-width: 520px) {
            .container {
                padding: 0 16px;
            }

            .page-hero h1 {
                font-size: 28px;
                letter-spacing: 0.5px;
            }

            .page-hero p {
                font-size: 14px;
            }

            .badge {
                font-size: 13px;
                padding: 7px 14px;
            }

            .section-head h2 {
                font-size: 23px;
            }

            .stats-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }

            .stat-card {
                padding: 28px 20px;
            }

            .stat-num {
                font-size: 36px;
            }

            .faq-item summary {
                padding: 18px 20px;
                font-size: 15px;
            }

            .faq-a {
                padding: 0 20px 20px;
                font-size: 14px;
            }

            .footer-bottom {
                flex-direction: column;
                text-align: center;
                gap: 6px;
            }
        }

/* roulang page: article */
:root {
    --primary: #2563eb;
    --primary-dark: #1d4ed8;
    --primary-deep: #1e40af;
    --primary-light: #dbeafe;
    --accent: #f59e0b;
    --accent-light: #fef3c7;
    --dark: #0f172a;
    --dark-2: #1e293b;
    --bg: #f1f5f9;
    --surface: #ffffff;
    --text: #1e293b;
    --text-muted: #64748b;
    --border: #e2e8f0;
    --radius: 18px;
    --radius-sm: 12px;
    --shadow-sm: 0 2px 8px rgba(15, 23, 42, 0.05);
    --shadow: 0 8px 30px rgba(15, 23, 42, 0.08);
    --shadow-lg: 0 20px 50px rgba(15, 23, 42, 0.12);
    --sidebar-w: 264px;
    --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
    font-family: 'Noto Sans SC', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.75;
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { text-decoration: none; color: inherit; }
ul, ol { list-style: none; }
button { font-family: inherit; border: none; background: none; cursor: pointer; }
input, select, textarea { font-family: inherit; font-size: 1rem; }
:focus-visible { outline: 3px solid rgba(37, 99, 235, 0.4); outline-offset: 2px; border-radius: 4px; }
.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }
.app-shell { display: flex; min-height: 100vh; }
.sidebar {
    width: var(--sidebar-w);
    position: fixed;
    top: 0; left: 0; bottom: 0;
    background: var(--dark);
    display: flex; flex-direction: column;
    z-index: 1000;
    transition: transform var(--transition);
}
.sidebar-inner { display: flex; flex-direction: column; flex: 1; padding: 28px 0 24px; overflow-y: auto; }
.sidebar-brand {
    display: flex; align-items: center; gap: 12px;
    padding: 0 24px 28px;
    border-bottom: 1px solid rgba(148, 163, 184, 0.15);
}
.sidebar-brand i {
    font-size: 1.6rem;
    color: var(--primary);
    background: linear-gradient(135deg, #2563eb, #60a5fa);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}
.sidebar-brand span {
    color: #f1f5f9;
    font-size: 1.1rem;
    font-weight: 700;
    letter-spacing: 0.5px;
}
.sidebar-nav { padding: 24px 14px; flex: 1; }
.sidebar-nav a {
    display: flex; align-items: center; gap: 14px;
    padding: 13px 18px;
    margin-bottom: 6px;
    border-radius: var(--radius-sm);
    color: #94a3b8;
    font-weight: 500;
    font-size: 0.95rem;
    transition: all var(--transition);
    position: relative;
}
.sidebar-nav a i { width: 20px; text-align: center; font-size: 1.05rem; }
.sidebar-nav a:hover { background: rgba(148, 163, 184, 0.1); color: #e2e8f0; transform: translateX(3px); }
.sidebar-nav a.active {
    background: linear-gradient(135deg, rgba(37, 99, 235, 0.25), rgba(37, 99, 235, 0.12));
    color: #ffffff;
    box-shadow: inset 3px 0 0 var(--primary), 0 0 20px rgba(37, 99, 235, 0.15);
}
.sidebar-nav a.active i { color: #60a5fa; }
.sidebar-info { padding: 0 20px; }
.sidebar-card {
    background: rgba(148, 163, 184, 0.08);
    border: 1px solid rgba(148, 163, 184, 0.12);
    padding: 18px 16px;
    border-radius: var(--radius-sm);
}
.sidebar-card i { color: var(--accent); font-size: 1.1rem; margin-bottom: 8px; }
.sidebar-card p { color: #94a3b8; font-size: 0.82rem; line-height: 1.6; }
.main-wrapper { flex: 1; margin-left: var(--sidebar-w); min-width: 0; display: flex; flex-direction: column; }
.main-content { flex: 1; }
.mobile-header {
    display: none;
    position: sticky;
    top: 0; z-index: 900;
    background: rgba(15, 23, 42, 0.95);
    backdrop-filter: blur(10px);
    padding: 14px 20px;
    align-items: center;
    justify-content: space-between;
}
.mobile-brand { color: #f1f5f9; font-weight: 700; font-size: 1.05rem; display: flex; align-items: center; gap: 8px; }
.mobile-brand i { color: var(--primary); }
.mobile-toggle {
    color: #e2e8f0;
    font-size: 1.3rem;
    padding: 6px 10px;
    border-radius: 8px;
    transition: background 0.2s;
}
.mobile-toggle:hover { background: rgba(148, 163, 184, 0.1); }
.page-banner {
    background: linear-gradient(135deg, rgba(15, 23, 42, 0.82), rgba(30, 64, 175, 0.72)), url('/assets/images/backpic/back-1.png');
    background-size: cover;
    background-position: center;
    padding: 70px 0 60px;
    color: #fff;
    position: relative;
}
.page-banner::after {
    content: '';
    position: absolute;
    bottom: 0; left: 0; right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--primary), var(--accent), transparent);
}
.breadcrumb { display: flex; align-items: center; gap: 8px; font-size: 0.88rem; color: #cbd5e1; margin-bottom: 18px; }
.breadcrumb a { color: #93c5fd; transition: color 0.2s; }
.breadcrumb a:hover { color: #ffffff; }
.breadcrumb .sep { color: #64748b; }
.page-banner h1 {
    font-size: 2.4rem;
    font-weight: 800;
    line-height: 1.3;
    max-width: 780px;
    margin-bottom: 20px;
    letter-spacing: -0.02em;
}
.article-meta { display: flex; align-items: center; gap: 18px; flex-wrap: wrap; }
.badge {
    display: inline-flex; align-items: center; gap: 6px;
    background: var(--primary);
    color: #fff;
    padding: 4px 14px;
    border-radius: 30px;
    font-size: 0.8rem;
    font-weight: 600;
}
.meta-item { display: flex; align-items: center; gap: 6px; color: #cbd5e1; font-size: 0.88rem; }
.meta-item i { color: #94a3b8; }
.section { padding: 60px 0; }
.article-main { padding: 50px 0 60px; }
.article-layout { display: grid; grid-template-columns: 1fr 320px; gap: 40px; align-items: start; }
.article-content-wrap { min-width: 0; }
.article-content {
    background: var(--surface);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: 36px;
}
.article-hero-img {
    width: 100%;
    height: 380px;
    object-fit: cover;
    border-radius: var(--radius-sm);
    margin-bottom: 28px;
}
.content-body { font-size: 1.02rem; line-height: 1.9; color: #334155; }
.content-body h2, .content-body h3, .content-body h4 {
    margin: 1.8em 0 0.8em;
    font-weight: 700;
    line-height: 1.4;
    color: var(--text);
}
.content-body h2 { font-size: 1.45rem; border-left: 4px solid var(--primary); padding-left: 14px; }
.content-body h3 { font-size: 1.2rem; }
.content-body p { margin-bottom: 1.2em; }
.content-body a { color: var(--primary); border-bottom: 1px solid transparent; transition: border-color 0.2s; }
.content-body a:hover { border-color: var(--primary); }
.content-body img { border-radius: var(--radius-sm); margin: 1.5em 0; }
.content-body ul, .content-body ol { margin: 1em 0; padding-left: 1.5em; }
.content-body ul { list-style: disc; }
.content-body ol { list-style: decimal; }
.content-body li { margin-bottom: 0.6em; }
.content-body blockquote {
    border-left: 4px solid var(--primary);
    background: var(--primary-light);
    padding: 16px 20px;
    border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
    margin: 1.5em 0;
    color: #1e293b;
    font-style: italic;
}
.content-body code {
    background: #0f172a;
    color: #fbbf24;
    padding: 2px 10px;
    border-radius: 6px;
    font-size: 0.88rem;
}
.content-body table { width: 100%; border-collapse: collapse; margin: 1.5em 0; }
.content-body th, .content-body td { border: 1px solid var(--border); padding: 12px 16px; text-align: left; }
.content-body th { background: var(--bg); font-weight: 600; }
.article-tags { margin-top: 30px; padding-top: 24px; border-top: 1px solid var(--border); display: flex; gap: 10px; flex-wrap: wrap; }
.tag {
    display: inline-block;
    background: var(--bg);
    color: var(--text-muted);
    padding: 5px 14px;
    border-radius: 30px;
    font-size: 0.8rem;
    font-weight: 500;
    transition: all 0.2s;
}
.tag:hover { background: var(--primary-light); color: var(--primary); }
.not-found {
    text-align: center;
    padding: 80px 30px;
    background: var(--surface);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
}
.not-found i {
    font-size: 3.5rem;
    color: #cbd5e1;
    margin-bottom: 20px;
}
.not-found h2 { font-size: 1.6rem; margin-bottom: 12px; color: var(--text); }
.not-found p { color: var(--text-muted); margin-bottom: 28px; }
.btn-primary {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    background: var(--primary);
    color: #fff;
    padding: 12px 28px;
    border-radius: 50px;
    font-weight: 600;
    font-size: 0.95rem;
    transition: all var(--transition);
    box-shadow: 0 4px 20px rgba(37, 99, 235, 0.35);
}
.btn-primary:hover { background: var(--primary-dark); transform: translateY(-2px); box-shadow: 0 8px 30px rgba(37, 99, 235, 0.4); }
.btn-secondary {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    background: transparent;
    color: var(--primary);
    border: 2px solid var(--primary);
    padding: 10px 24px;
    border-radius: 50px;
    font-weight: 600;
    font-size: 0.9rem;
    transition: all var(--transition);
}
.btn-secondary:hover { background: var(--primary); color: #fff; transform: translateY(-2px); }
.article-sidebar { display: flex; flex-direction: column; gap: 24px; }
.sidebar-widget {
    background: var(--surface);
    border-radius: var(--radius);
    box-shadow: var(--shadow-sm);
    padding: 24px 22px;
    border: 1px solid rgba(226, 232, 240, 0.6);
}
.widget-title {
    display: flex; align-items: center; gap: 10px;
    font-weight: 700;
    font-size: 1rem;
    margin-bottom: 18px;
    padding-bottom: 12px;
    border-bottom: 1px solid var(--border);
    color: var(--text);
}
.widget-title i { color: var(--primary); }
.widget-list { display: flex; flex-direction: column; gap: 2px; }
.widget-item {
    display: flex; justify-content: space-between;
    padding: 10px 0;
    font-size: 0.9rem;
    border-bottom: 1px dashed var(--border);
}
.widget-item:last-child { border-bottom: none; }
.widget-label { color: var(--text-muted); }
.widget-value { font-weight: 600; color: var(--text); }
.share-links { display: flex; gap: 12px; }
.share-btn {
    width: 42px; height: 42px;
    display: flex; align-items: center; justify-content: center;
    border-radius: 50%;
    background: var(--bg);
    color: var(--text-muted);
    transition: all 0.25s;
    font-size: 1rem;
}
.share-btn:hover { background: var(--primary); color: #fff; transform: translateY(-3px); box-shadow: 0 6px 16px rgba(37, 99, 235, 0.3); }
.sidebar-guide p { font-size: 0.9rem; color: var(--text-muted); margin-bottom: 16px; line-height: 1.6; }
.sidebar-guide .btn-secondary { width: 100%; justify-content: center; }
.recommend-section { padding: 50px 0 60px; background: var(--bg); }
.section-header { display: flex; align-items: center; justify-content: space-between; margin-bottom: 32px; }
.section-header h2 { font-size: 1.7rem; font-weight: 700; color: var(--text); display: flex; align-items: center; gap: 12px; }
.section-header h2::before {
    content: '';
    width: 4px; height: 24px;
    background: linear-gradient(180deg, var(--primary), var(--accent));
    border-radius: 4px;
}
.section-header .more-link { color: var(--primary); font-weight: 500; font-size: 0.9rem; display: flex; align-items: center; gap: 6px; transition: gap 0.2s; }
.section-header .more-link:hover { gap: 10px; }
.recommend-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 22px; }
.recommend-card {
    background: var(--surface);
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: all var(--transition);
    border: 1px solid rgba(226, 232, 240, 0.5);
    display: flex; flex-direction: column;
}
.recommend-card:hover { transform: translateY(-6px); box-shadow: var(--shadow); }
.recommend-thumb { width: 100%; height: 160px; overflow: hidden; }
.recommend-thumb img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.5s; }
.recommend-card:hover .recommend-thumb img { transform: scale(1.06); }
.recommend-info { padding: 18px 18px 20px; flex: 1; display: flex; flex-direction: column; }
.recommend-info h4 { font-size: 0.95rem; font-weight: 600; line-height: 1.5; margin-bottom: 12px; color: var(--text); display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; flex: 1; }
.recommend-info .card-meta { display: flex; gap: 12px; font-size: 0.8rem; color: var(--text-muted); }
.card-meta span { display: flex; align-items: center; gap: 4px; }
.card-meta i { font-size: 0.75rem; color: #94a3b8; }
.empty-tip { grid-column: 1 / -1; text-align: center; padding: 40px; color: var(--text-muted); background: var(--surface); border-radius: var(--radius); box-shadow: var(--shadow-sm); }
.faq-section { padding: 60px 0; background: var(--surface); }
.faq-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; margin-top: 36px; }
.faq-item {
    background: var(--bg);
    border-radius: var(--radius-sm);
    padding: 24px;
    transition: all var(--transition);
    border: 1px solid transparent;
}
.faq-item:hover { border-color: var(--primary-light); background: var(--surface); box-shadow: var(--shadow-sm); }
.faq-item h4 { font-size: 1rem; font-weight: 600; margin-bottom: 10px; color: var(--text); display: flex; align-items: center; gap: 8px; }
.faq-item h4 i { color: var(--primary); font-size: 0.85rem; }
.faq-item p { font-size: 0.88rem; color: var(--text-muted); line-height: 1.7; }
.cta-section {
    padding: 60px 0;
    background: linear-gradient(135deg, rgba(15, 23, 42, 0.9), rgba(30, 64, 175, 0.85)), url('/assets/images/backpic/back-3.png');
    background-size: cover;
    background-position: center;
    color: #fff;
    position: relative;
}
.cta-inner { display: flex; align-items: center; justify-content: space-between; gap: 30px; flex-wrap: wrap; }
.cta-text h2 { font-size: 1.6rem; font-weight: 700; margin-bottom: 10px; }
.cta-text p { color: #cbd5e1; font-size: 0.95rem; max-width: 500px; }
.cta-btn {
    display: inline-flex; align-items: center; gap: 10px;
    background: var(--accent);
    color: #0f172a;
    padding: 14px 32px;
    border-radius: 50px;
    font-weight: 700;
    transition: all var(--transition);
    box-shadow: 0 4px 24px rgba(245, 158, 11, 0.4);
}
.cta-btn:hover { transform: translateY(-3px); box-shadow: 0 10px 36px rgba(245, 158, 11, 0.5); background: #fbbf24; }
.app-footer { background: var(--dark); color: #94a3b8; padding: 50px 0 0; }
.footer-inner { display: grid; grid-template-columns: 2fr 1fr 1fr; gap: 40px; padding-bottom: 36px; }
.footer-brand h3 { color: #f1f5f9; font-size: 1.15rem; font-weight: 700; margin-bottom: 14px; display: flex; align-items: center; }
.footer-brand p { font-size: 0.85rem; line-height: 1.7; max-width: 360px; }
.footer-col h4 { color: #e2e8f0; font-size: 0.95rem; font-weight: 600; margin-bottom: 16px; }
.footer-col a {
    display: block;
    color: #94a3b8;
    font-size: 0.85rem;
    padding: 5px 0;
    transition: color 0.2s;
}
.footer-col a:hover { color: #60a5fa; }
.footer-bottom {
    border-top: 1px solid rgba(148, 163, 184, 0.15);
    padding: 20px 0 24px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.8rem;
    color: #64748b;
    flex-wrap: wrap;
    gap: 8px;
}
.sidebar-overlay { display: none; }

@media (max-width: 1024px) {
    .recommend-grid { grid-template-columns: repeat(2, 1fr); }
    .article-layout { grid-template-columns: 1fr; }
    .article-sidebar { flex-direction: row; flex-wrap: wrap; }
    .sidebar-widget { flex: 1; min-width: 220px; }
    .page-banner h1 { font-size: 2rem; }
}

@media (max-width: 768px) {
    .sidebar {
        transform: translateX(-100%);
        width: 280px;
        box-shadow: 20px 0 40px rgba(0, 0, 0, 0.2);
    }
    .sidebar.open { transform: translateX(0); }
    .sidebar-overlay {
        display: block;
        position: fixed;
        inset: 0;
        background: rgba(15, 23, 42, 0.5);
        backdrop-filter: blur(2px);
        opacity: 0;
        visibility: hidden;
        transition: all 0.3s;
        z-index: 950;
    }
    .sidebar-overlay.show { opacity: 1; visibility: visible; }
    .main-wrapper { margin-left: 0; }
    .mobile-header { display: flex; }
    .page-banner { padding: 50px 0 42px; }
    .page-banner h1 { font-size: 1.7rem; }
    .section { padding: 40px 0; }
    .article-content { padding: 24px; }
    .article-hero-img { height: 220px; }
    .faq-grid { grid-template-columns: 1fr; }
    .footer-inner { grid-template-columns: 1fr; gap: 28px; }
    .cta-inner { flex-direction: column; text-align: center; }
    .cta-text p { max-width: 100%; }
    .article-sidebar { flex-direction: column; }
}

@media (max-width: 520px) {
    .container { padding: 0 16px; }
    .recommend-grid { grid-template-columns: 1fr; }
    .page-banner h1 { font-size: 1.45rem; }
    .article-meta { gap: 10px; }
    .meta-item { font-size: 0.8rem; }
    .badge { font-size: 0.75rem; padding: 3px 12px; }
    .article-content { padding: 18px; }
    .content-body { font-size: 0.96rem; }
    .section-header h2 { font-size: 1.35rem; }
    .cta-text h2 { font-size: 1.25rem; }
    .footer-bottom { flex-direction: column; text-align: center; }
}