/* roulang page: index */
:root {
            --brand: #3b6cf0;
            --brand-dark: #1f3ea3;
            --accent: #18d0c0;
            --bg-dark: #0b1020;
            --bg-card: #111730;
            --text-main: #1a2233;
            --text-weak: #6b7280;
            --border-color: rgba(255, 255, 255, 0.08);
            --radius-lg: 20px;
            --radius-md: 14px;
            --shadow-card: 0 12px 40px rgba(0, 0, 0, 0.18);
        }
        * {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
            line-height: 1.7;
            background: #f7f9fc;
            color: var(--text-main);
            -webkit-font-smoothing: antialiased;
        }
        img {
            max-width: 100%;
            display: block;
        }
        a {
            text-decoration: none;
            color: inherit;
            transition: all 0.25s ease;
        }
        button {
            cursor: pointer;
            border: none;
            font-family: inherit;
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
        }
        .bg-hero {
            background-image: url('/assets/images/backpic/back-1.png');
            background-size: cover;
            background-position: center;
            position: relative;
        }
        .bg-hero::before {
            content: "";
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(7, 12, 28, 0.92) 0%, rgba(7, 12, 28, 0.75) 50%, rgba(59, 108, 240, 0.35) 100%);
        }
        .bg-section {
            background-image: url('/assets/images/backpic/back-2.png');
            background-size: cover;
            background-position: center;
            position: relative;
        }
        .bg-section::before {
            content: "";
            position: absolute;
            inset: 0;
            background: rgba(11, 16, 32, 0.82);
        }
        .glass-nav {
            background: rgba(13, 18, 38, 0.72);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            border: 1px solid rgba(255, 255, 255, 0.08);
            border-radius: 60px;
            box-shadow: 0 12px 40px rgba(0, 0, 0, 0.25);
            transition: background 0.3s ease, box-shadow 0.3s ease;
        }
        .glass-nav:hover {
            background: rgba(13, 18, 38, 0.85);
            box-shadow: 0 16px 50px rgba(0, 0, 0, 0.35);
        }
        .nav-link {
            color: rgba(255, 255, 255, 0.75);
            font-size: 15px;
            font-weight: 500;
            padding: 8px 18px;
            border-radius: 40px;
            transition: all 0.3s ease;
            position: relative;
        }
        .nav-link:hover {
            color: #ffffff;
            background: rgba(255, 255, 255, 0.08);
        }
        .nav-link.active {
            color: #ffffff;
            background: linear-gradient(135deg, #3b6cf0, #18d0c0);
            box-shadow: 0 4px 16px rgba(59, 108, 240, 0.4);
        }
        .btn-primary {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            background: linear-gradient(135deg, #3b6cf0, #1f3ea3);
            color: #fff;
            padding: 14px 32px;
            border-radius: 50px;
            font-weight: 600;
            font-size: 15px;
            box-shadow: 0 8px 24px rgba(59, 108, 240, 0.35);
            transition: all 0.3s ease;
            border: none;
        }
        .btn-primary:hover {
            transform: translateY(-3px);
            box-shadow: 0 14px 34px rgba(59, 108, 240, 0.45);
        }
        .btn-primary:active {
            transform: translateY(0);
        }
        .btn-ghost {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            background: rgba(255, 255, 255, 0.1);
            color: #fff;
            padding: 14px 32px;
            border-radius: 50px;
            font-weight: 500;
            font-size: 15px;
            border: 1px solid rgba(255, 255, 255, 0.2);
            transition: all 0.3s ease;
            backdrop-filter: blur(10px);
        }
        .btn-ghost:hover {
            background: rgba(255, 255, 255, 0.18);
            border-color: rgba(255, 255, 255, 0.4);
            transform: translateY(-3px);
        }
        .card-hover {
            transition: transform 0.35s ease, box-shadow 0.35s ease, border-color 0.35s ease;
            border: 1px solid var(--border-color);
            background: var(--bg-card);
            border-radius: var(--radius-lg);
        }
        .card-hover:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-card);
            border-color: rgba(59, 108, 240, 0.3);
        }
        .badge {
            display: inline-block;
            padding: 4px 12px;
            border-radius: 30px;
            font-size: 12px;
            font-weight: 600;
            letter-spacing: 0.3px;
        }
        .badge-blue {
            background: rgba(59, 108, 240, 0.15);
            color: #6f9dff;
        }
        .badge-mint {
            background: rgba(24, 208, 192, 0.15);
            color: #4fe3d4;
        }
        .badge-warm {
            background: rgba(255, 170, 60, 0.15);
            color: #ffb457;
        }
        .stats-card {
            background: rgba(255, 255, 255, 0.06);
            border: 1px solid rgba(255, 255, 255, 0.08);
            border-radius: var(--radius-lg);
            backdrop-filter: blur(12px);
            transition: all 0.3s ease;
        }
        .stats-card:hover {
            background: rgba(255, 255, 255, 0.1);
            transform: translateY(-4px);
        }
        .faq-item {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            transition: all 0.3s ease;
        }
        .faq-item:hover {
            border-color: rgba(59, 108, 240, 0.2);
        }
        .faq-question {
            cursor: pointer;
            padding: 20px 24px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            font-weight: 600;
            color: #e8ecf4;
        }
        .faq-answer {
            padding: 0 24px 20px;
            color: rgba(255, 255, 255, 0.7);
            display: none;
            line-height: 1.8;
        }
        .faq-item.open .faq-answer {
            display: block;
        }
        .faq-item.open .faq-icon {
            transform: rotate(45deg);
        }
        .faq-icon {
            transition: transform 0.3s ease;
            color: #3b6cf0;
        }
        .list-card {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            padding: 24px;
            transition: all 0.3s ease;
        }
        .list-card:hover {
            border-color: rgba(59, 108, 240, 0.25);
            transform: translateY(-3px);
        }
        .list-card a {
            display: flex;
            align-items: flex-start;
            gap: 14px;
        }
        .footer-link {
            color: rgba(255, 255, 255, 0.6);
            transition: color 0.25s ease;
        }
        .footer-link:hover {
            color: #ffffff;
        }
        .mobile-menu {
            display: none;
        }
        .focus-outline:focus-visible {
            outline: 3px solid rgba(59, 108, 240, 0.6);
            outline-offset: 2px;
        }
        @media (max-width: 768px) {
            .desktop-nav {
                display: none;
            }
            .mobile-menu {
                display: flex;
            }
            .mobile-menu-panel {
                position: absolute;
                top: 96px;
                left: 20px;
                right: 20px;
                background: rgba(13, 18, 38, 0.97);
                border-radius: 20px;
                padding: 20px;
                backdrop-filter: blur(20px);
                border: 1px solid rgba(255, 255, 255, 0.08);
                display: none;
                z-index: 100;
                box-shadow: 0 24px 60px rgba(0, 0, 0, 0.4);
            }
            .mobile-menu-panel.open {
                display: block;
            }
            .mobile-menu-panel a {
                display: block;
                padding: 14px 20px;
                color: rgba(255, 255, 255, 0.85);
                font-weight: 500;
                border-radius: 12px;
            }
            .mobile-menu-panel a:hover {
                background: rgba(59, 108, 240, 0.15);
                color: #fff;
            }
            .mobile-menu-panel a.active {
                background: linear-gradient(135deg, #3b6cf0, #18d0c0);
                color: #fff;
            }
        }
        @media (max-width: 520px) {
            .container {
                padding: 0 16px;
            }
            .hero-title {
                font-size: 32px !important;
                line-height: 1.3 !important;
            }
            .hero-subtitle {
                font-size: 15px !important;
            }
            .btn-primary,
            .btn-ghost {
                width: 100%;
                justify-content: center;
            }
        }

/* roulang page: category1 */
:root {
            --bg: #070b14;
            --bg-soft: #0c1222;
            --surface: rgba(255, 255, 255, 0.04);
            --surface-hover: rgba(255, 255, 255, 0.08);
            --border: rgba(255, 255, 255, 0.08);
            --border-strong: rgba(255, 255, 255, 0.14);
            --text: #f1f5f9;
            --text-weak: rgba(255, 255, 255, 0.55);
            --primary: #3b82f6;
            --secondary: #14b8a6;
            --primary-glow: rgba(59, 130, 246, 0.35);
            --radius: 18px;
            --shadow: 0 12px 40px rgba(0, 0, 0, 0.35);
            --section-space: 80px;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            margin: 0;
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
            background: var(--bg);
            color: var(--text);
            line-height: 1.7;
            -webkit-font-smoothing: antialiased;
        }

        body::selection {
            background: rgba(59, 130, 246, 0.35);
            color: #fff;
        }

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

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

        button,
        input {
            font: inherit;
            border: none;
            background: none;
        }

        a:focus-visible,
        button:focus-visible,
        summary:focus-visible {
            outline: 2px solid #38bdf8;
            outline-offset: 3px;
            border-radius: 8px;
        }

        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }

        .glass-nav {
            background: rgba(10, 15, 30, 0.78);
            border: 1px solid rgba(255, 255, 255, 0.09);
            border-radius: 999px;
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            box-shadow: 0 12px 40px rgba(0, 0, 0, 0.35);
            padding-top: 10px;
            padding-bottom: 10px;
        }

        .desktop-nav {
            display: flex;
            align-items: center;
            gap: 6px;
        }

        .nav-link {
            display: inline-flex;
            align-items: center;
            padding: 8px 18px;
            border-radius: 999px;
            font-size: 14px;
            font-weight: 500;
            color: rgba(255, 255, 255, 0.65);
            transition: all 0.22s ease;
        }

        .nav-link:hover {
            background: rgba(255, 255, 255, 0.08);
            color: #fff;
            transform: translateY(-1px);
        }

        .nav-link.active {
            background: linear-gradient(135deg, rgba(59, 130, 246, 0.92), rgba(20, 184, 166, 0.92));
            color: #fff;
            font-weight: 600;
            box-shadow: 0 6px 24px var(--primary-glow);
        }

        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 9px 22px;
            border-radius: 999px;
            background: linear-gradient(135deg, #3b82f6, #14b8a6);
            color: #fff;
            font-weight: 600;
            font-size: 14px;
            line-height: 1.4;
            transition: all 0.25s ease;
            box-shadow: 0 6px 22px rgba(59, 130, 246, 0.28);
        }

        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 10px 30px rgba(59, 130, 246, 0.4);
        }

        .btn-primary:active {
            transform: translateY(0);
            box-shadow: 0 4px 14px rgba(59, 130, 246, 0.25);
        }

        .btn-outline {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 9px 22px;
            border-radius: 999px;
            border: 1px solid rgba(255, 255, 255, 0.18);
            color: rgba(255, 255, 255, 0.85);
            font-weight: 500;
            font-size: 14px;
            transition: all 0.25s ease;
            background: rgba(255, 255, 255, 0.02);
        }

        .btn-outline:hover {
            border-color: rgba(56, 189, 248, 0.6);
            background: rgba(56, 189, 248, 0.08);
            color: #fff;
            transform: translateY(-2px);
        }

        .btn-outline:active {
            transform: translateY(0);
        }

        .mobile-menu {
            display: none;
        }

        .mobile-menu-panel {
            display: none;
            flex-direction: column;
            gap: 6px;
            margin-top: 12px;
            padding: 16px 20px;
            border-radius: 20px;
            background: rgba(10, 15, 30, 0.92);
            border: 1px solid rgba(255, 255, 255, 0.08);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
        }

        .mobile-menu-panel.open {
            display: flex;
        }

        .mobile-menu-panel a {
            padding: 10px 14px;
            border-radius: 12px;
            color: rgba(255, 255, 255, 0.75);
            font-size: 15px;
            font-weight: 500;
            transition: all 0.2s;
        }

        .mobile-menu-panel a:hover,
        .mobile-menu-panel a.active {
            background: rgba(59, 130, 246, 0.15);
            color: #fff;
        }

        .glass-card {
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            transition: all 0.28s ease;
        }

        .glass-card:hover {
            background: var(--surface-hover);
            border-color: rgba(59, 130, 246, 0.35);
            transform: translateY(-4px);
            box-shadow: var(--shadow);
        }

        .channel-card {
            padding: 26px 24px;
            position: relative;
            overflow: hidden;
        }

        .channel-card::after {
            content: "";
            position: absolute;
            right: -32px;
            top: -32px;
            width: 90px;
            height: 90px;
            border-radius: 50%;
            background: radial-gradient(circle, rgba(56, 189, 248, 0.14), transparent 70%);
            opacity: 0;
            transition: opacity 0.3s;
        }

        .channel-card:hover::after {
            opacity: 1;
        }

        .channel-icon {
            width: 50px;
            height: 50px;
            border-radius: 16px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            background: linear-gradient(135deg, rgba(59, 130, 246, 0.18), rgba(20, 184, 166, 0.18));
            border: 1px solid rgba(255, 255, 255, 0.08);
            font-size: 20px;
        }

        .cover-scroll {
            display: flex;
            gap: 22px;
            overflow-x: auto;
            padding-bottom: 18px;
            scroll-snap-type: x mandatory;
            scrollbar-width: thin;
            scrollbar-color: rgba(59, 130, 246, 0.35) transparent;
        }

        .cover-scroll::-webkit-scrollbar {
            height: 6px;
        }

        .cover-scroll::-webkit-scrollbar-track {
            background: transparent;
        }

        .cover-scroll::-webkit-scrollbar-thumb {
            background: rgba(59, 130, 246, 0.35);
            border-radius: 999px;
        }

        .cover-card {
            min-width: 280px;
            max-width: 280px;
            scroll-snap-align: start;
            border-radius: 18px;
            overflow: hidden;
            background: rgba(255, 255, 255, 0.03);
            border: 1px solid var(--border);
            transition: all 0.3s ease;
            flex-shrink: 0;
        }

        .cover-card:hover {
            transform: translateY(-6px);
            border-color: rgba(56, 189, 248, 0.45);
            box-shadow: 0 18px 44px rgba(0, 0, 0, 0.45);
        }

        .cover-card img {
            width: 100%;
            height: 170px;
            object-fit: cover;
            transition: transform 0.5s ease;
        }

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

        .cover-content {
            padding: 18px 18px 20px;
        }

        .badge {
            display: inline-flex;
            align-items: center;
            padding: 4px 12px;
            border-radius: 999px;
            font-size: 12px;
            font-weight: 600;
            letter-spacing: 0.02em;
            background: rgba(56, 189, 248, 0.12);
            color: #7dd3fc;
            border: 1px solid rgba(56, 189, 248, 0.18);
        }

        .badge-green {
            background: rgba(20, 184, 166, 0.12);
            color: #5eead4;
            border-color: rgba(20, 184, 166, 0.2);
        }

        .badge-purple {
            background: rgba(168, 85, 247, 0.12);
            color: #d8b4fe;
            border-color: rgba(168, 85, 247, 0.2);
        }

        .stat-block {
            text-align: center;
            padding: 20px 12px;
        }

        .stat-num {
            font-size: 30px;
            font-weight: 800;
            background: linear-gradient(135deg, #38bdf8, #5eead4);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            line-height: 1.2;
        }

        .rank-item {
            display: flex;
            align-items: center;
            gap: 18px;
            padding: 18px 22px;
            border-radius: 16px;
            background: rgba(255, 255, 255, 0.02);
            border: 1px solid rgba(255, 255, 255, 0.05);
            transition: all 0.25s ease;
        }

        .rank-item:hover {
            background: rgba(255, 255, 255, 0.05);
            border-color: rgba(56, 189, 248, 0.3);
            transform: translateX(4px);
        }

        .rank-num {
            width: 38px;
            height: 38px;
            flex-shrink: 0;
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 800;
            font-size: 15px;
            background: rgba(255, 255, 255, 0.06);
            color: rgba(255, 255, 255, 0.65);
        }

        .rank-item:nth-child(1) .rank-num {
            background: linear-gradient(135deg, #f59e0b, #f97316);
            color: #fff;
        }

        .rank-item:nth-child(2) .rank-num {
            background: linear-gradient(135deg, #64748b, #94a3b8);
            color: #fff;
        }

        .rank-item:nth-child(3) .rank-num {
            background: linear-gradient(135deg, #b45309, #d97706);
            color: #fff;
        }

        .article-item {
            display: flex;
            align-items: flex-start;
            gap: 18px;
            padding: 22px 24px;
            border-radius: 18px;
            background: rgba(255, 255, 255, 0.02);
            border: 1px solid rgba(255, 255, 255, 0.05);
            transition: all 0.25s ease;
        }

        .article-item:hover {
            background: rgba(255, 255, 255, 0.045);
            border-color: rgba(20, 184, 166, 0.3);
            transform: translateY(-2px);
        }

        .article-dot {
            width: 10px;
            height: 10px;
            border-radius: 50%;
            margin-top: 9px;
            flex-shrink: 0;
            background: linear-gradient(135deg, #3b82f6, #14b8a6);
            box-shadow: 0 0 14px rgba(56, 189, 248, 0.6);
        }

        .faq-item {
            border-radius: 16px;
            background: rgba(255, 255, 255, 0.025);
            border: 1px solid rgba(255, 255, 255, 0.06);
            overflow: hidden;
            transition: all 0.25s ease;
        }

        .faq-item:hover {
            border-color: rgba(56, 189, 248, 0.25);
        }

        .faq-summary {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            padding: 20px 24px;
            cursor: pointer;
            font-weight: 600;
            font-size: 16px;
            color: rgba(255, 255, 255, 0.9);
            list-style: none;
        }

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

        .faq-icon {
            width: 28px;
            height: 28px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            background: rgba(56, 189, 248, 0.12);
            color: #7dd3fc;
            font-size: 13px;
            transition: transform 0.3s;
            flex-shrink: 0;
        }

        .faq-item[open] .faq-icon {
            transform: rotate(45deg);
        }

        .faq-answer {
            padding: 0 24px 20px;
            color: rgba(255, 255, 255, 0.62);
            font-size: 14px;
            line-height: 1.8;
        }

        .cta-section {
            position: relative;
            border-radius: 28px;
            overflow: hidden;
            border: 1px solid rgba(255, 255, 255, 0.1);
        }

        .footer-link {
            color: rgba(255, 255, 255, 0.5);
            transition: all 0.2s ease;
            display: inline-block;
        }

        .footer-link:hover {
            color: #fff;
            padding-left: 4px;
        }

        .section-label {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 13px;
            font-weight: 600;
            letter-spacing: 0.08em;
            text-transform: uppercase;
            color: #38bdf8;
        }

        .section-label::before {
            content: "";
            width: 24px;
            height: 1px;
            background: linear-gradient(90deg, #38bdf8, transparent);
        }

        @media (max-width: 1023.98px) {
            .desktop-nav {
                display: none !important;
            }

            .mobile-menu {
                display: flex;
            }

            :root {
                --section-space: 60px;
            }
        }

        @media (max-width: 639.98px) {
            .cover-card {
                min-width: 240px;
                max-width: 240px;
            }

            .cover-card img {
                height: 145px;
            }

            .rank-item {
                gap: 12px;
                padding: 14px 16px;
            }

            .article-item {
                padding: 16px 16px;
                gap: 12px;
            }

            .faq-summary {
                padding: 16px 18px;
                font-size: 15px;
            }

            .faq-answer {
                padding: 0 18px 16px;
            }

            .stat-num {
                font-size: 24px;
            }

            .glass-nav {
                padding-left: 14px;
                padding-right: 14px;
            }
        }

        @media (max-width: 420px) {
            .btn-primary,
            .btn-outline {
                padding: 8px 16px;
                font-size: 13px;
            }

            .cover-card {
                min-width: 210px;
                max-width: 210px;
            }
        }

/* roulang page: article */
:root {
            --bg-primary: #080d1c;
            --bg-secondary: #0c1428;
            --accent-blue: #3b82f6;
            --accent-teal: #2dd4bf;
            --text-primary: rgba(255, 255, 255, 0.92);
            --text-secondary: rgba(255, 255, 255, 0.55);
            --text-muted: rgba(255, 255, 255, 0.35);
            --border-subtle: rgba(255, 255, 255, 0.08);
            --card-bg: rgba(255, 255, 255, 0.04);
            --card-hover: rgba(255, 255, 255, 0.09);
            --radius-card: 1.25rem;
            --shadow-glow: 0 10px 40px rgba(0, 0, 0, 0.35);
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: 'PingFang SC', 'Microsoft YaHei', 'Hiragino Sans GB', sans-serif;
            background: var(--bg-primary);
            color: var(--text-primary);
            line-height: 1.7;
            overflow-x: hidden;
        }

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

        a {
            color: inherit;
            text-decoration: none;
            transition: all .25s ease;
        }

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

        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding-left: 1.25rem;
            padding-right: 1.25rem;
        }

        /* 悬浮胶囊导航 */
        .glass-nav {
            background: rgba(13, 20, 40, 0.72);
            border: 1px solid rgba(255, 255, 255, 0.1);
            border-radius: 999px;
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            box-shadow: 0 10px 40px rgba(0, 0, 0, 0.3);
        }

        .nav-link {
            color: rgba(255, 255, 255, 0.6);
            padding: 0.5rem 1rem;
            border-radius: 999px;
            font-size: 0.875rem;
            font-weight: 500;
            transition: all .25s ease;
            white-space: nowrap;
        }

        .nav-link:hover {
            color: #fff;
            background: rgba(255, 255, 255, 0.08);
        }

        .nav-link.active {
            color: #fff;
            background: linear-gradient(135deg, rgba(59, 130, 246, 0.3), rgba(45, 212, 191, 0.2));
            box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.12);
        }

        .btn-primary {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 0.5rem;
            background: linear-gradient(135deg, #3b82f6, #2dd4bf);
            color: #fff;
            font-weight: 600;
            font-size: 0.875rem;
            padding: 0.75rem 1.5rem;
            border-radius: 999px;
            transition: all .3s ease;
            box-shadow: 0 4px 12px rgba(59, 130, 246, 0.25);
            cursor: pointer;
            white-space: nowrap;
        }

        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(59, 130, 246, 0.4);
        }

        .btn-primary:active {
            transform: translateY(0);
        }

        .btn-primary:focus-visible {
            outline: 3px solid rgba(45, 212, 191, 0.5);
            outline-offset: 2px;
        }

        .btn-outline {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 0.5rem;
            border: 1px solid rgba(255, 255, 255, 0.18);
            color: rgba(255, 255, 255, 0.85);
            font-weight: 500;
            font-size: 0.875rem;
            padding: 0.75rem 1.5rem;
            border-radius: 999px;
            transition: all .3s ease;
            background: rgba(255, 255, 255, 0.04);
        }

        .btn-outline:hover {
            border-color: rgba(255, 255, 255, 0.4);
            background: rgba(255, 255, 255, 0.08);
            transform: translateY(-2px);
        }

        .footer-link {
            color: rgba(255, 255, 255, 0.45);
            transition: color .2s ease;
        }

        .footer-link:hover {
            color: #fff;
        }

        .mobile-menu-panel {
            display: none;
            background: rgba(13, 20, 40, 0.95);
            border: 1px solid rgba(255, 255, 255, 0.1);
            border-radius: 1.25rem;
            padding: 0.75rem;
            margin-top: 0.75rem;
            backdrop-filter: blur(20px);
            box-shadow: 0 20px 50px rgba(0, 0, 0, 0.4);
        }

        .mobile-menu-panel.open {
            display: flex;
            flex-direction: column;
            gap: 0.25rem;
        }

        .mobile-menu-panel a {
            padding: 0.75rem 1rem;
            border-radius: 0.75rem;
            color: rgba(255, 255, 255, 0.65);
            font-size: 0.925rem;
            transition: all .2s;
        }

        .mobile-menu-panel a:hover {
            background: rgba(255, 255, 255, 0.08);
            color: #fff;
        }

        .mobile-menu-panel a.active {
            background: linear-gradient(135deg, rgba(59, 130, 246, 0.25), rgba(45, 212, 191, 0.15));
            color: #fff;
        }

        /* 文章内容排版 */
        .article-content {
            color: rgba(255, 255, 255, 0.78);
            font-size: 1.05rem;
            line-height: 1.9;
        }

        .article-content p {
            margin-bottom: 1.5rem;
            color: rgba(255, 255, 255, 0.75);
        }

        .article-content h2 {
            font-size: 1.5rem;
            font-weight: 700;
            color: #fff;
            margin: 2.5rem 0 1rem;
            letter-spacing: -0.01em;
            position: relative;
            padding-left: 1rem;
        }

        .article-content h2::before {
            content: '';
            position: absolute;
            left: 0;
            top: 0.35rem;
            bottom: 0.35rem;
            width: 4px;
            background: linear-gradient(to bottom, #3b82f6, #2dd4bf);
            border-radius: 4px;
        }

        .article-content h3 {
            font-size: 1.2rem;
            font-weight: 600;
            color: #fff;
            margin: 1.8rem 0 0.75rem;
        }

        .article-content strong {
            color: #fff;
            font-weight: 600;
        }

        .article-content blockquote {
            border-left: 3px solid #3b82f6;
            padding: 0.9rem 1.25rem;
            background: rgba(59, 130, 246, 0.08);
            border-radius: 0 12px 12px 0;
            color: rgba(255, 255, 255, 0.7);
            font-style: italic;
            margin: 1.5rem 0;
        }

        .article-content ul,
        .article-content ol {
            margin: 1rem 0 1.5rem;
            padding-left: 1.5rem;
        }

        .article-content li {
            margin-bottom: 0.6rem;
        }

        .article-content ul li {
            list-style-type: none;
            position: relative;
            padding-left: 1.2rem;
        }

        .article-content ul li::before {
            content: '';
            position: absolute;
            left: 0;
            top: 0.65em;
            width: 7px;
            height: 7px;
            border-radius: 50%;
            background: linear-gradient(135deg, #3b82f6, #2dd4bf);
        }

        .article-content ol li {
            counter-increment: custom-counter;
            position: relative;
            padding-left: 0.5rem;
        }

        .article-content a {
            color: #60a5fa;
            border-bottom: 1px solid rgba(96, 165, 250, 0.3);
        }

        .article-content a:hover {
            color: #2dd4bf;
            border-bottom-color: rgba(45, 212, 191, 0.5);
        }

        .article-content img {
            border-radius: 1rem;
            margin: 1.5rem 0;
            box-shadow: 0 8px 30px rgba(0, 0, 0, 0.3);
        }

        .article-content hr {
            border: none;
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            margin: 2rem 0;
        }

        .article-content code {
            background: rgba(255, 255, 255, 0.08);
            padding: 0.2rem 0.5rem;
            border-radius: 6px;
            font-size: 0.9em;
        }

        /* 文章卡片 */
        .article-card {
            background: var(--card-bg);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-card);
            transition: all .3s ease;
            overflow: hidden;
        }

        .article-card:hover {
            background: var(--card-hover);
            border-color: rgba(255, 255, 255, 0.18);
            transform: translateY(-6px);
            box-shadow: 0 16px 40px rgba(0, 0, 0, 0.35);
        }

        .article-card:focus-visible,
        .nav-link:focus-visible,
        .btn-outline:focus-visible,
        .footer-link:focus-visible {
            outline: 3px solid rgba(45, 212, 191, 0.4);
            outline-offset: 2px;
        }

        .badge-cat {
            display: inline-flex;
            align-items: center;
            gap: 0.35rem;
            background: linear-gradient(135deg, rgba(59, 130, 246, 0.2), rgba(45, 212, 191, 0.15));
            border: 1px solid rgba(59, 130, 246, 0.25);
            color: rgba(255, 255, 255, 0.9);
            font-size: 0.75rem;
            font-weight: 500;
            padding: 0.25rem 0.875rem;
            border-radius: 999px;
            letter-spacing: 0.02em;
        }

        .tag-chip {
            display: inline-flex;
            align-items: center;
            gap: 0.3rem;
            background: rgba(255, 255, 255, 0.06);
            border: 1px solid rgba(255, 255, 255, 0.1);
            color: rgba(255, 255, 255, 0.65);
            font-size: 0.8rem;
            padding: 0.35rem 0.85rem;
            border-radius: 999px;
            transition: all .2s;
        }

        .tag-chip:hover {
            background: rgba(255, 255, 255, 0.1);
            border-color: rgba(255, 255, 255, 0.2);
            color: #fff;
        }

        .hero-gradient {
            background: linear-gradient(to bottom,
                    rgba(8, 13, 28, 0.72),
                    rgba(8, 13, 28, 0.6) 60%,
                    rgba(8, 13, 28, 0.92) 100%);
        }

        .side-info-card {
            background: rgba(255, 255, 255, 0.04);
            border: 1px solid rgba(255, 255, 255, 0.08);
            border-radius: 1.125rem;
            transition: border-color .3s ease;
        }

        .side-info-card:hover {
            border-color: rgba(255, 255, 255, 0.16);
        }

        /* 搜索框 */
        .search-input {
            background: rgba(255, 255, 255, 0.06);
            border: 1px solid rgba(255, 255, 255, 0.12);
            color: #fff;
            border-radius: 999px;
            padding: 0.65rem 1.25rem;
            font-size: 0.875rem;
            transition: all .25s;
            width: 100%;
        }

        .search-input::placeholder {
            color: rgba(255, 255, 255, 0.35);
        }

        .search-input:focus {
            border-color: rgba(59, 130, 246, 0.5);
            background: rgba(255, 255, 255, 0.09);
            box-shadow: 0 0 0 4px rgba(59, 130, 246, 0.15);
        }

        /* 分栏 */
        .content-grid {
            display: grid;
            grid-template-columns: minmax(0, 1fr) 340px;
            gap: 2.5rem;
        }

        @media (max-width: 1024px) {
            .content-grid {
                grid-template-columns: 1fr;
                gap: 2rem;
            }

            .desktop-nav {
                display: none !important;
            }

            .mobile-menu {
                display: flex !important;
            }
        }

        @media (min-width: 1025px) {
            .mobile-menu {
                display: none !important;
            }
        }

        @media (max-width: 520px) {
            .container {
                padding-left: 1rem;
                padding-right: 1rem;
            }

            .article-content {
                font-size: 0.98rem;
            }

            .article-content h2 {
                font-size: 1.3rem;
            }
        }