/* roulang page: index */
:root {
            --brand-50: #EFF4FF; --brand-600: #155EEF; --brand-700: #0B47C1; --accent: #FF7E21;
            --bg-body: #F5F8FD; --surface: #FFFFFF; --surface-muted: #F8FAFC; --bg-subtle: #F1F5F9;
            --text-900: #0F172A; --text-600: #475569; --text-400: #94A3B8; --border: #E2E8F0;
            --footer-bg: #0F1D3A;
        }
        * { box-sizing: border-box; margin: 0; padding: 0; }
        body { font-family: "PingFang SC","HarmonyOS Sans","Noto Sans SC","Microsoft YaHei",sans-serif; background: var(--bg-body); color: var(--text-900); line-height: 1.7; -webkit-font-smoothing: antialiased; }
        a { text-decoration: none; color: inherit; }
        img { max-width: 100%; display: block; }
        .container { max-width: 1120px; margin: 0 auto; padding: 0 20px; }
        .nav-link { font-size: 15px; font-weight: 500; color: var(--text-600); padding: 8px 4px; position: relative; }
        .nav-link::after { content: ''; position: absolute; left: 0; right: 0; bottom: 0; height: 4px; border-radius: 2px; background: transparent; }
        .nav-link:hover { color: var(--brand-600); }
        .nav-link.active { color: var(--brand-600); font-weight: 700; }
        .nav-link.active::after { background: var(--brand-600); }
        .btn-primary { display: inline-flex; align-items: center; justify-content: center; height: 48px; padding: 0 28px; border-radius: 999px; background: var(--brand-600); color: #fff; font-weight: 600; font-size: 15px; transition: all .25s; }
        .btn-primary:hover { background: var(--brand-700); box-shadow: 0 6px 20px rgba(21,94,239,.25); }
        .tab-item { display: flex; flex-direction: column; align-items: center; gap: 2px; padding: 6px 0; color: var(--text-400); font-size: 11px; font-weight: 600; position: relative; }
        .tab-item.active { color: var(--brand-600); }
        .tab-item.active::before { content: ''; position: absolute; top: 0; left: 50%; transform: translateX(-50%); width: 16px; height: 3px; border-radius: 0 0 4px 4px; background: var(--brand-600); }
        .footer-link { color: var(--text-400); font-size: 14px; display: block; padding: 4px 0; }
        .footer-link:hover { color: #93C5FD; }
        .article-body h2 { font-size: 22px; font-weight: 700; color: var(--text-900); margin: 32px 0 16px; padding-left: 12px; border-left: 4px solid var(--brand-600); }
        .article-body h3 { font-size: 18px; font-weight: 700; color: var(--text-900); margin: 24px 0 12px; }
        .article-body p { font-size: 16px; line-height: 1.85; color: var(--text-600); margin-bottom: 20px; }
        .article-body blockquote { background: var(--bg-subtle); border-left: 5px solid var(--brand-600); padding: 16px 20px; margin: 24px 0; border-radius: 0 12px 12px 0; color: var(--text-600); }
        .article-body li { margin-bottom: 8px; color: var(--text-600); }
        .related-card { border-radius: 16px; overflow: hidden; background: #fff; box-shadow: 0 1px 3px rgba(0,0,0,.05); transition: all .25s; }
        .related-card:hover { box-shadow: 0 8px 24px rgba(0,0,0,.10); transform: translateY(-3px); }
        .related-card:hover .related-title { color: var(--brand-600); }

/* roulang page: category1 */
:root {
            --brand-600: #155EEF;
            --brand-700: #0B47C1;
            --brand-50: #EFF4FF;
            --accent: #FF7E21;
            --bg-body: #F5F8FD;
            --surface: #FFFFFF;
            --surface-muted: #F8FAFC;
            --bg-subtle: #F1F5F9;
            --text-900: #0F172A;
            --text-600: #475569;
            --text-400: #94A3B8;
            --border: #E2E8F0;
            --success: #22C55E;
            --live-red: #EF4444;
            --footer-bg: #0F1D3A;
            --radius-sm: 12px;
            --radius-md: 16px;
            --radius-lg: 20px;
            --shadow-sm: 0 1px 3px rgba(0,0,0,0.05);
            --shadow-md: 0 8px 24px rgba(0,0,0,0.10);
            --shadow-lg: 0 12px 32px rgba(15,23,42,0.06);
            --shadow-deep: 0 20px 40px rgba(11,71,193,0.25);
        }
        * {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "HarmonyOS Sans", "Noto Sans SC", "Microsoft YaHei", sans-serif;
            background: var(--bg-body);
            color: var(--text-900);
            line-height: 1.7;
            font-size: 16px;
            -webkit-font-smoothing: antialiased;
        }
        a {
            color: inherit;
            text-decoration: none;
            transition: color 0.25s ease;
        }
        img {
            max-width: 100%;
            display: block;
        }
        button, input {
            font-family: inherit;
            border: none;
            outline: none;
            background: none;
        }
        .container {
            max-width: 1120px;
            margin: 0 auto;
            padding-left: 16px;
            padding-right: 16px;
        }
        @media (min-width: 768px) {
            .container {
                padding-left: 24px;
                padding-right: 24px;
            }
        }
        @media (min-width: 1024px) {
            .container {
                padding-left: 32px;
                padding-right: 32px;
            }
        }
        /* 导航 */
        #siteHeader .nav-link {
            font-size: 15px;
            font-weight: 500;
            color: var(--text-600);
            position: relative;
            padding: 4px 2px;
        }
        #siteHeader .nav-link:hover {
            color: var(--brand-600);
        }
        #siteHeader .nav-link.active {
            color: var(--brand-600);
            font-weight: 700;
        }
        #siteHeader .nav-link.active::after {
            content: '';
            position: absolute;
            left: 0;
            right: 0;
            bottom: -2px;
            height: 4px;
            border-radius: 2px;
            background: var(--brand-600);
        }
        /* 移动端底部 Tab */
        .mobile-tab-item {
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            gap: 2px;
            color: var(--text-400);
            font-size: 11px;
            font-weight: 600;
            transition: color 0.25s ease;
            position: relative;
        }
        .mobile-tab-item.active {
            color: var(--brand-600);
        }
        .mobile-tab-item.active::before {
            content: '';
            position: absolute;
            top: 0;
            left: 50%;
            transform: translateX(-50%);
            width: 16px;
            height: 3px;
            border-radius: 0 0 3px 3px;
            background: var(--brand-600);
        }
        /* 锚点目录 */
        .anchor-link {
            display: block;
            padding: 10px 16px;
            border-radius: 12px;
            font-size: 14px;
            font-weight: 500;
            color: var(--text-600);
            transition: all 0.25s ease;
        }
        .anchor-link:hover {
            background: var(--brand-50);
            color: var(--brand-600);
        }
        .anchor-link.active {
            background: var(--brand-50);
            color: var(--brand-600);
            font-weight: 700;
        }
        /* 流程卡片 */
        .step-card {
            transition: box-shadow 0.25s ease;
        }
        .step-card:hover {
            box-shadow: var(--shadow-md);
        }
        .step-number {
            font-size: 72px;
            font-weight: 900;
            color: #DBEAFE;
            line-height: 1;
            min-width: 100px;
        }
        /* FAQ */
        .faq-item {
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: var(--radius-md);
            padding: 20px 24px;
            transition: box-shadow 0.25s ease;
        }
        .faq-item:hover {
            box-shadow: var(--shadow-sm);
        }
        .faq-question {
            cursor: pointer;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            font-size: 16px;
            font-weight: 700;
            color: var(--text-900);
        }
        .faq-icon {
            width: 20px;
            height: 20px;
            flex-shrink: 0;
            transition: transform 0.3s ease;
            color: var(--brand-600);
        }
        .faq-item.open .faq-icon {
            transform: rotate(45deg);
        }
        .faq-answer {
            font-size: 14px;
            color: var(--text-600);
            line-height: 1.8;
            margin-top: 12px;
            display: none;
        }
        .faq-item.open .faq-answer {
            display: block;
        }
        /* 页脚 */
        .footer-link {
            display: block;
            font-size: 14px;
            color: #94A3B8;
            padding: 4px 0;
            transition: color 0.25s ease;
        }
        .footer-link:hover {
            color: #FFFFFF;
        }
        /* 按钮通用 */
        .btn-primary {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            height: 48px;
            padding: 0 28px;
            border-radius: 999px;
            background: var(--brand-600);
            color: #FFFFFF;
            font-size: 16px;
            font-weight: 600;
            transition: all 0.25s ease;
        }
        .btn-primary:hover {
            background: var(--brand-700);
        }
        .btn-primary:active {
            transform: scale(0.98);
        }
        .btn-outline {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            height: 48px;
            padding: 0 28px;
            border-radius: 999px;
            background: transparent;
            color: #FFFFFF;
            border: 1px solid rgba(255,255,255,0.6);
            font-size: 16px;
            font-weight: 500;
            transition: all 0.25s ease;
        }
        .btn-outline:hover {
            border-color: #FFFFFF;
            background: rgba(255,255,255,0.1);
        }
        .btn-outline:active {
            transform: scale(0.98);
        }
        .btn-accent {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            height: 48px;
            padding: 0 28px;
            border-radius: 999px;
            background: var(--accent);
            color: #FFFFFF;
            font-size: 16px;
            font-weight: 600;
            transition: all 0.25s ease;
        }
        .btn-accent:hover {
            background: #E5690A;
        }
        .btn-accent:active {
            transform: scale(0.98);
        }
        /* 卡片 */
        .guide-card {
            background: var(--surface);
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-sm);
            transition: all 0.25s ease;
        }
        .guide-card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-3px);
        }
        /* 页头横幅 */
        .page-banner {
            background: linear-gradient(135deg, #EFF4FF 0%, #F8FAFC 100%);
            border-bottom: 1px solid var(--border);
        }
        /* 数字 tabular-nums */
        .tabular-nums {
            font-variant-numeric: tabular-nums;
        }
        /* 图片遮罩 */
        .img-overlay {
            position: relative;
        }
        .img-overlay::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(15,23,42,0.72) 0%, rgba(15,23,42,0.25) 100%);
            border-radius: inherit;
        }
        /* 滚动条美化 */
        ::-webkit-scrollbar {
            width: 8px;
            height: 8px;
        }
        ::-webkit-scrollbar-track {
            background: var(--bg-body);
        }
        ::-webkit-scrollbar-thumb {
            background: #CBD5E1;
            border-radius: 4px;
        }
        ::-webkit-scrollbar-thumb:hover {
            background: #94A3B8;
        }
        /* 焦点可见 */
        a:focus-visible,
        button:focus-visible {
            outline: 3px solid rgba(21,94,239,0.3);
            outline-offset: 2px;
            border-radius: 4px;
        }
        /* 移动端适配 */
        @media (max-width: 768px) {
            .step-number {
                font-size: 48px;
                min-width: 64px;
            }
            .page-banner {
                padding-top: 32px !important;
                padding-bottom: 32px !important;
            }
            .container {
                padding-left: 16px;
                padding-right: 16px;
            }
        }
        @media (max-width: 640px) {
            .step-card {
                flex-direction: column;
                align-items: flex-start;
                gap: 12px;
            }
            .step-number {
                font-size: 42px;
            }
        }

/* roulang page: category2 */
:root {
            --brand-50: #EFF4FF;
            --brand-600: #155EEF;
            --brand-700: #0B47C1;
            --accent: #FF7E21;
            --bg-body: #F5F8FD;
            --surface: #FFFFFF;
            --surface-muted: #F8FAFC;
            --bg-subtle: #F1F5F9;
            --text-900: #0F172A;
            --text-600: #475569;
            --text-400: #94A3B8;
            --border: #E2E8F0;
            --success: #22C55E;
            --live-red: #EF4444;
            --footer-bg: #0F1D3A;
            --radius-card: 16px;
            --radius-lg: 20px;
            --shadow-card: 0 1px 3px rgba(0, 0, 0, 0.05);
            --shadow-hover: 0 8px 24px rgba(0, 0, 0, 0.10);
            --shadow-dark: 0 20px 40px rgba(11, 71, 193, 0.25);
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "HarmonyOS Sans", "Noto Sans SC", "Microsoft YaHei", sans-serif;
            background-color: var(--bg-body);
            color: var(--text-900);
            line-height: 1.7;
            font-size: 15px;
            -webkit-font-smoothing: antialiased;
        }

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

        a {
            color: inherit;
            text-decoration: none;
            transition: color 0.25s ease, background-color 0.25s ease, border-color 0.25s ease, box-shadow 0.25s ease, opacity 0.25s ease;
        }

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

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

        /* ===== 导航 ===== */
        #siteHeader {
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
        }

        #siteHeader.scrolled {
            background: #FFFFFF !important;
            border-bottom: 1px solid var(--border);
            box-shadow: 0 4px 20px rgba(15, 23, 42, 0.06);
        }

        .nav-link {
            font-size: 15px;
            font-weight: 500;
            color: var(--text-600);
            position: relative;
            padding: 6px 2px;
            transition: color 0.25s ease;
        }

        .nav-link:hover {
            color: var(--brand-600);
        }

        .nav-link.active {
            color: var(--brand-600);
            font-weight: 700;
        }

        .nav-link.active::after {
            content: '';
            position: absolute;
            left: 0;
            bottom: 0;
            width: 100%;
            height: 4px;
            border-radius: 999px;
            background: var(--brand-600);
        }

        /* ===== 底部移动端 Tab ===== */
        .mobile-tab {
            display: flex;
            position: fixed;
            bottom: 0;
            left: 0;
            right: 0;
            z-index: 60;
            height: calc(64px + env(safe-area-inset-bottom));
            padding-bottom: env(safe-area-inset-bottom);
            background: #FFFFFF;
            border-top: 1px solid var(--border);
            box-shadow: 0 -4px 20px rgba(15, 23, 42, 0.05);
        }

        .mobile-tab a {
            flex: 1;
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            gap: 3px;
            font-size: 11px;
            font-weight: 600;
            color: var(--text-400);
            position: relative;
            transition: color 0.25s ease;
        }

        .mobile-tab a.active {
            color: var(--brand-600);
        }

        .mobile-tab a.active::before {
            content: '';
            position: absolute;
            top: 0;
            left: 50%;
            transform: translateX(-50%);
            width: 16px;
            height: 3px;
            border-radius: 999px;
            background: var(--brand-600);
        }

        @media (min-width: 768px) {
            .mobile-tab {
                display: none;
            }
        }

        /* ===== 通用按钮 ===== */
        .btn-primary {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            height: 48px;
            padding: 0 28px;
            border-radius: 999px;
            background: var(--brand-600);
            color: #FFFFFF;
            font-size: 15px;
            font-weight: 600;
            transition: background-color 0.25s ease, transform 0.25s ease, box-shadow 0.25s ease;
        }

        .btn-primary:hover {
            background: var(--brand-700);
            box-shadow: 0 8px 24px rgba(21, 94, 239, 0.22);
            transform: translateY(-1px);
        }

        .btn-primary:active {
            transform: scale(0.98);
        }

        .btn-outline {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            height: 48px;
            padding: 0 28px;
            border-radius: 999px;
            background: transparent;
            border: 1px solid rgba(255, 255, 255, 0.7);
            color: #FFFFFF;
            font-size: 15px;
            font-weight: 600;
            transition: border-color 0.25s ease, background-color 0.25s ease, transform 0.25s ease;
        }

        .btn-outline:hover {
            border-color: #FFFFFF;
            background: rgba(255, 255, 255, 0.08);
            transform: translateY(-1px);
        }

        .btn-accent {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            height: 48px;
            padding: 0 28px;
            border-radius: 999px;
            background: var(--accent);
            color: #FFFFFF;
            font-size: 15px;
            font-weight: 600;
            transition: background-color 0.25s ease, transform 0.25s ease;
        }

        .btn-accent:hover {
            filter: brightness(1.05);
            transform: translateY(-1px);
        }

        .btn-accent:active {
            transform: scale(0.98);
        }

        /* ===== 卡片 ===== */
        .feature-card {
            background: #FFFFFF;
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            transition: transform 0.25s ease, box-shadow 0.25s ease;
        }

        .feature-card:hover {
            transform: translateY(-3px);
            box-shadow: var(--shadow-hover);
        }

        /* ===== 页脚 ===== */
        .footer-link {
            display: block;
            font-size: 14px;
            color: #94A3B8;
            padding: 4px 0;
            transition: color 0.25s ease;
        }

        .footer-link:hover {
            color: #EFF4FF;
        }

        /* ===== FAQ ===== */
        .faq-item {
            background: #FFFFFF;
            border: 1px solid var(--border);
            border-radius: 16px;
            padding: 20px 24px;
            margin-bottom: 12px;
            transition: box-shadow 0.25s ease;
        }

        .faq-item:hover {
            box-shadow: 0 4px 16px rgba(15, 23, 42, 0.06);
        }

        .faq-item summary {
            list-style: none;
            cursor: pointer;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            font-size: 16px;
            font-weight: 700;
            color: var(--text-900);
        }

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

        .faq-item summary .icon {
            width: 20px;
            height: 20px;
            flex-shrink: 0;
            border-radius: 999px;
            background: var(--brand-50);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--brand-600);
            font-size: 14px;
            font-weight: 700;
            transition: transform 0.3s ease;
        }

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

        .faq-item .answer {
            margin-top: 12px;
            font-size: 14px;
            line-height: 1.8;
            color: var(--text-600);
        }

        /* ===== 焦点区域 ===== */
        .band-ligth {
            background: var(--surface-muted);
        }

        .section-padding {
            padding-top: 96px;
            padding-bottom: 96px;
        }

        @media (max-width: 768px) {
            .section-padding {
                padding-top: 64px;
                padding-bottom: 64px;
            }
        }

        /* ===== 深色 CTA ===== */
        .cta-dark {
            background: linear-gradient(135deg, #0B47C1 0%, #155EEF 100%);
            border-radius: 24px;
            box-shadow: var(--shadow-dark);
            padding: 56px 32px;
            text-align: center;
        }

        /* ===== 装饰 ===== */
        .section-title {
            font-size: 28px;
            font-weight: 800;
            line-height: 1.3;
            color: var(--text-900);
        }

        .section-sub {
            font-size: 14px;
            color: var(--text-600);
            line-height: 1.8;
        }

        .data-card {
            background: #FFFFFF;
            border-radius: 16px;
            padding: 32px 24px;
            text-align: center;
            box-shadow: var(--shadow-card);
            transition: transform 0.25s ease, box-shadow 0.25s ease;
        }

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

        .data-card .num {
            font-size: 42px;
            font-weight: 800;
            color: var(--brand-600);
            line-height: 1.2;
            font-variant-numeric: tabular-nums;
        }

        .data-card .label {
            font-size: 14px;
            color: var(--text-600);
            margin-top: 8px;
        }
        @media (max-width: 768px) {
            .section-title {
                font-size: 22px;
            }
        }

/* roulang page: article */
:root {
            --brand-50: #EFF4FF;
            --brand-100: #DBEAFE;
            --brand-600: #155EEF;
            --brand-700: #0B47C1;
            --accent-500: #FF7E21;
            --bg-body: #F5F8FD;
            --surface: #FFFFFF;
            --surface-muted: #F8FAFC;
            --bg-subtle: #F1F5F9;
            --text-900: #0F172A;
            --text-600: #475569;
            --text-400: #94A3B8;
            --border: #E2E8F0;
            --success: #22C55E;
            --danger: #EF4444;
            --footer-bg: #0F1D3A;
            --radius-sm: 8px;
            --radius-md: 12px;
            --radius-lg: 16px;
            --radius-xl: 20px;
            --radius-2xl: 24px;
            --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.05);
            --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.10);
            --shadow-lg: 0 20px 40px rgba(11, 71, 193, 0.25);
            --shadow-card: 0 12px 32px rgba(15, 23, 42, 0.06);
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: 'PingFang SC', 'HarmonyOS Sans', 'Noto Sans SC', 'Microsoft YaHei', sans-serif;
            background: var(--bg-body);
            color: var(--text-900);
            line-height: 1.7;
            -webkit-font-smoothing: antialiased;
        }

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

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

        button {
            cursor: pointer;
            background: none;
            border: none;
        }

        input {
            outline: none;
        }

        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding-left: 1rem;
            padding-right: 1rem;
        }

        @media (min-width: 768px) {
            .container {
                padding-left: 1.5rem;
                padding-right: 1.5rem;
            }
        }

        .nav-link {
            font-size: 15px;
            font-weight: 500;
            color: var(--text-600);
            transition: all 0.25s ease;
            position: relative;
            padding: 8px 2px;
        }

        .nav-link:hover {
            color: var(--brand-600);
        }

        .nav-link.active {
            color: var(--brand-600);
            font-weight: 700;
        }

        .nav-link.active::after {
            content: '';
            position: absolute;
            left: 50%;
            bottom: -2px;
            transform: translateX(-50%);
            width: 20px;
            height: 4px;
            border-radius: 999px;
            background: var(--brand-600);
        }

        .footer-link {
            display: block;
            font-size: 14px;
            color: #94A3B8;
            padding: 4px 0;
            transition: all 0.25s ease;
        }

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

        #siteHeader.header-scrolled {
            background: rgba(255, 255, 255, 1);
            border-bottom: 1px solid var(--border);
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.04);
        }

        .article-content p {
            margin-bottom: 24px;
            font-size: 16px;
            color: #334155;
            line-height: 1.85;
        }

        .article-content h2 {
            font-size: 22px;
            font-weight: 700;
            margin: 36px 0 16px;
            padding-left: 12px;
            border-left: 4px solid var(--brand-600);
            color: var(--text-900);
            line-height: 1.4;
        }

        .article-content h3 {
            font-size: 18px;
            font-weight: 700;
            margin: 28px 0 12px;
            color: var(--text-900);
        }

        .article-content img {
            border-radius: 12px;
            margin: 24px 0;
            width: 100%;
            height: auto;
        }

        .article-content blockquote {
            background: var(--bg-subtle);
            border-left: 4px solid var(--brand-600);
            padding: 20px 24px;
            border-radius: 0 12px 12px 0;
            margin: 24px 0;
            color: var(--text-600);
            font-size: 15px;
        }

        .article-content ul,
        .article-content ol {
            margin: 16px 0 24px;
            padding-left: 1.5rem;
        }

        .article-content li {
            margin-bottom: 8px;
            font-size: 16px;
            color: #334155;
            line-height: 1.7;
        }

        .article-content ul li::marker {
            color: var(--brand-600);
        }

        .article-content ol li::marker {
            color: var(--brand-600);
            font-weight: 700;
        }

        .article-content a {
            color: var(--brand-600);
            font-weight: 600;
            text-decoration: underline;
            text-underline-offset: 3px;
        }

        .bottom-tab {
            position: fixed;
            bottom: 0;
            left: 0;
            right: 0;
            z-index: 100;
            background: rgba(255, 255, 255, 0.96);
            backdrop-filter: blur(12px);
            border-top: 1px solid var(--border);
            padding-bottom: env(safe-area-inset-bottom);
            display: flex;
            height: 64px;
        }

        @media (min-width: 768px) {
            .bottom-tab {
                display: none;
            }
        }

        .tab-item {
            flex: 1;
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            gap: 4px;
            color: #94A3B8;
            font-size: 11px;
            font-weight: 600;
            transition: color 0.25s ease;
            position: relative;
        }

        .tab-item svg {
            width: 24px;
            height: 24px;
        }

        .tab-item.active {
            color: var(--brand-600);
        }

        .tab-item.active::before {
            content: '';
            position: absolute;
            top: 0;
            left: 50%;
            transform: translateX(-50%);
            width: 16px;
            height: 3px;
            border-radius: 0 0 999px 999px;
            background: var(--brand-600);
        }

        .btn-primary {
            transition: all 0.25s ease;
        }

        .btn-primary:hover {
            background: var(--brand-700);
        }

        .btn-primary:active {
            transform: scale(0.98);
        }

        .related-card {
            transition: all 0.25s ease;
        }

        .related-card:hover {
            box-shadow: 0 8px 24px rgba(0, 0, 0, 0.10);
            transform: translateY(-3px);
        }

        .related-card:hover .play-overlay {
            opacity: 1;
        }