/* roulang page: index */
:root {
            --brand-blue: #2563EB;
            --brand-blue-deep: #1E40AF;
            --accent-orange: #F97316;
            --accent-cyan: #06B6D4;
            --success: #10B981;
            --danger: #EF4444;
            --slate-50: #F8FAFC;
            --slate-100: #F1F5F9;
            --slate-200: #E2E8F0;
            --slate-300: #CBD5E1;
            --slate-500: #64748B;
            --slate-600: #475569;
            --slate-700: #334155;
            --slate-800: #1E293B;
            --slate-900: #0F172A;
            --radius-sm: 6px;
            --radius-md: 8px;
            --radius-lg: 12px;
            --radius-xl: 16px;
            --radius-2xl: 20px;
            --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
            --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.08);
            --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.12);
        }
        *,
        *::before,
        *::after {
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        body {
            font-family: system-ui, -apple-system, 'Segoe UI', Roboto, 'Helvetica Neue', 'Noto Sans', 'PingFang SC', 'Microsoft YaHei', sans-serif;
            line-height: 1.6;
            background-color: #F8FAFC;
            color: #334155;
            margin: 0;
            padding: 0;
            min-height: 100vh;
        }
        a {
            color: inherit;
            text-decoration: none;
            transition: color 0.2s ease;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        button {
            cursor: pointer;
            font-family: inherit;
        }
        input {
            font-family: inherit;
        }
        .card-hover-lift {
            transition: transform 0.25s ease, box-shadow 0.25s ease, border-color 0.25s ease;
        }
        .card-hover-lift:hover {
            transform: translateY(-3px);
            box-shadow: var(--shadow-lg);
            border-color: #BFDBFE;
        }
        .data-card-hover {
            transition: border-color 0.2s ease, box-shadow 0.2s ease;
        }
        .data-card-hover:hover {
            border-color: #93C5FD;
            box-shadow: var(--shadow-md);
        }
        .nav-link-active {
            border-bottom: 2px solid #2563EB;
            color: #2563EB;
            font-weight: 600;
        }
        .faq-item {
            border-bottom: 1px solid #E2E8F0;
            cursor: pointer;
            transition: background-color 0.2s ease;
        }
        .faq-item:hover {
            background-color: #F8FAFC;
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease, padding 0.35s ease;
        }
        .faq-item.open .faq-answer {
            max-height: 300px;
            padding-bottom: 1rem;
        }
        .live-dot {
            display: inline-block;
            width: 8px;
            height: 8px;
            border-radius: 50%;
            background-color: #F97316;
            animation: pulseSoft 1.5s ease-in-out infinite;
            margin-right: 4px;
            vertical-align: middle;
        }
        @keyframes pulseSoft {
            0%,
            100% {
                opacity: 1;
                box-shadow: 0 0 0 0 rgba(249, 115, 22, 0.6);
            }
            50% {
                opacity: 0.5;
                box-shadow: 0 0 0 8px rgba(249, 115, 22, 0);
            }
        }
        #mobile-menu {
            transition: transform 0.3s ease;
            transform: translateX(100%);
        }
        #mobile-menu.open {
            transform: translateX(0);
        }
        #mobile-overlay {
            transition: opacity 0.3s ease;
            opacity: 0;
            pointer-events: none;
        }
        #mobile-overlay.active {
            opacity: 0.5;
            pointer-events: auto;
        }
        @media (max-width: 1024px) {
            .desktop-nav-links {
                display: none;
            }
            .mobile-nav-trigger {
                display: flex;
            }
        }
        @media (min-width: 1025px) {
            .desktop-nav-links {
                display: flex;
            }
            .mobile-nav-trigger {
                display: none;
            }
        }

/* roulang page: category3 */
:root {
            --brand-blue: #2563EB;
            --brand-blue-deep: #1E40AF;
            --accent-orange: #F97316;
            --accent-cyan: #06B6D4;
            --surface-light: #F8FAFC;
            --surface-stripe: #F1F5F9;
            --text-heading: #0F172A;
            --text-body: #334155;
            --text-muted: #64748B;
            --border-light: #E2E8F0;
            --radius-card: 12px;
            --radius-sm: 6px;
            --shadow-card: 0 4px 12px 0 rgba(0, 0, 0, 0.08);
            --shadow-card-lg: 0 8px 24px 0 rgba(0, 0, 0, 0.12);
            --transition-fast: 200ms ease;
        }

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

        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        body {
            font-family: system-ui, -apple-system, 'Segoe UI', Roboto, 'Helvetica Neue', 'Noto Sans', 'PingFang SC', 'Microsoft YaHei', sans-serif;
            line-height: 1.6;
            background-color: #F8FAFC;
            color: #334155;
            margin: 0;
            padding: 0;
            min-height: 100vh;
        }

        a {
            color: inherit;
            text-decoration: none;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        button {
            cursor: pointer;
            font-family: inherit;
        }
        input {
            font-family: inherit;
        }

        /* 导航相关 */
        .desktop-nav-links {
            display: flex;
        }
        @media (max-width: 1023px) {
            .desktop-nav-links {
                display: none;
            }
        }
        .mobile-nav-trigger {
            display: none;
            background: none;
            border: none;
            cursor: pointer;
        }
        @media (max-width: 1023px) {
            .mobile-nav-trigger {
                display: flex;
            }
        }

        /* 移动端菜单 */
        .mobile-menu-overlay {
            position: fixed;
            inset: 0;
            background: rgba(0, 0, 0, 0.45);
            z-index: 45;
            opacity: 0;
            pointer-events: none;
            transition: opacity 0.3s ease;
        }
        .mobile-menu-overlay.active {
            opacity: 1;
            pointer-events: auto;
        }
        .mobile-menu-panel {
            position: fixed;
            top: 0;
            right: 0;
            width: 280px;
            max-width: 85vw;
            height: 100%;
            background: #fff;
            z-index: 46;
            transform: translateX(100%);
            transition: transform 0.3s ease;
            padding: 80px 24px 40px;
            display: flex;
            flex-direction: column;
            gap: 8px;
            box-shadow: -4px 0 20px rgba(0, 0, 0, 0.15);
        }
        .mobile-menu-panel.active {
            transform: translateX(0);
        }
        .mobile-menu-panel a {
            display: block;
            padding: 12px 16px;
            font-size: 1.05rem;
            font-weight: 600;
            color: #0F172A;
            border-radius: 8px;
            transition: background 0.2s;
        }
        .mobile-menu-panel a:hover {
            background: #F1F5F9;
        }
        .mobile-menu-panel .mobile-cta {
            margin-top: 12px;
            background: #F97316;
            color: #fff;
            text-align: center;
            border-radius: 999px;
            font-weight: 600;
            padding: 12px 16px;
        }
        .mobile-menu-panel .mobile-cta:hover {
            background: #EA580C;
        }

        /* 导航 active 状态 */
        .nav-active {
            color: #2563EB !important;
            border-bottom: 2px solid #2563EB;
            font-weight: 600;
        }

        /* 卡片悬停 */
        .card-hover {
            transition: transform var(--transition-fast), box-shadow var(--transition-fast);
        }
        .card-hover:hover {
            transform: translateY(-3px);
            box-shadow: var(--shadow-card-lg);
        }

        /* FAQ 手风琴 */
        .faq-item {
            border-bottom: 1px solid #E2E8F0;
            cursor: pointer;
        }
        .faq-item:last-child {
            border-bottom: none;
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease, padding 0.35s ease;
            padding: 0 0 0 2rem;
            color: #475569;
            line-height: 1.7;
            font-size: 0.95rem;
        }
        .faq-item.open .faq-answer {
            max-height: 400px;
            padding: 0 0 1rem 2rem;
        }
        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 1rem 0;
            font-weight: 600;
            font-size: 1.05rem;
            color: #0F172A;
            gap: 12px;
            user-select: none;
        }
        .faq-question .faq-icon {
            flex-shrink: 0;
            width: 24px;
            height: 24px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 50%;
            background: #F1F5F9;
            transition: transform 0.3s ease;
            font-size: 14px;
            color: #2563EB;
            font-weight: 700;
        }
        .faq-item.open .faq-question .faq-icon {
            transform: rotate(45deg);
            background: #DBEAFE;
        }

        /* 标签样式 */
        .tag-live {
            background: #F97316;
            color: #fff;
            padding: 2px 8px;
            border-radius: 4px;
            font-size: 0.7rem;
            font-weight: 700;
            letter-spacing: 0.5px;
            animation: pulse-dot 2s infinite;
        }
        @keyframes pulse-dot {
            0%,
            100% {
                opacity: 1;
            }
            50% {
                opacity: 0.6;
            }
        }

        .tag-hot {
            background: #F59E0B;
            color: #fff;
            padding: 2px 7px;
            border-radius: 4px;
            font-size: 0.7rem;
            font-weight: 700;
        }
        .tag-new {
            background: #EF4444;
            color: #fff;
            padding: 2px 7px;
            border-radius: 4px;
            font-size: 0.7rem;
            font-weight: 700;
        }
        .tag-recommend {
            background: #06B6D4;
            color: #fff;
            padding: 2px 7px;
            border-radius: 4px;
            font-size: 0.7rem;
            font-weight: 700;
        }

        /* 专题卡片图片容器 */
        .topic-card-img {
            overflow: hidden;
            border-radius: 12px 12px 0 0;
            position: relative;
        }
        .topic-card-img img {
            transition: transform 0.4s ease;
            width: 100%;
            height: 220px;
            object-fit: cover;
            display: block;
        }
        .card-hover:hover .topic-card-img img {
            transform: scale(1.06);
        }

        /* 分析师卡片 */
        .analyst-card {
            background: #fff;
            border-radius: 12px;
            padding: 24px;
            box-shadow: var(--shadow-card);
            border: 1px solid #E2E8F0;
            transition: box-shadow 0.2s ease;
        }
        .analyst-card:hover {
            box-shadow: var(--shadow-card-lg);
        }

        /* 响应式补充 */
        @media (max-width: 640px) {
            .topic-card-img img {
                height: 180px;
            }
            .analyst-card {
                padding: 16px;
            }
        }

/* roulang page: category1 */
:root {
            --brand-blue: #2563EB;
            --brand-blue-deep: #1E40AF;
            --accent-orange: #F97316;
            --accent-cyan: #06B6D4;
            --bg-page: #F8FAFC;
            --bg-card: #FFFFFF;
            --bg-stripe: #F1F5F9;
            --text-heading: #0F172A;
            --text-body: #334155;
            --text-muted: #64748B;
            --border-light: #E2E8F0;
            --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
            --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.07);
            --shadow-lg: 0 8px 28px rgba(0, 0, 0, 0.10);
            --radius-sm: 6px;
            --radius-md: 10px;
            --radius-lg: 14px;
            --radius-xl: 18px;
            --spacing-section: 5rem;
        }

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

        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        body {
            margin: 0;
            font-family: system-ui, -apple-system, 'Segoe UI', Roboto, 'Helvetica Neue', 'Noto Sans', 'PingFang SC', 'Microsoft YaHei', sans-serif;
            line-height: 1.65;
            background-color: var(--bg-page);
            color: var(--text-body);
            overflow-x: hidden;
        }

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

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

        button {
            cursor: pointer;
            font-family: inherit;
        }

        input {
            font-family: inherit;
        }

        .container-main {
            max-width: 1280px;
            margin-left: auto;
            margin-right: auto;
            padding-left: 1rem;
            padding-right: 1rem;
        }

        @media (min-width: 640px) {
            .container-main {
                padding-left: 1.5rem;
                padding-right: 1.5rem;
            }
        }
        @media (min-width: 1024px) {
            .container-main {
                padding-left: 2rem;
                padding-right: 2rem;
            }
        }

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

        @media (max-width: 767px) {
            .section-spacing {
                padding-top: 3rem;
                padding-bottom: 3rem;
            }
            :root {
                --spacing-section: 3rem;
            }
        }

        .card-hover {
            transition: transform 0.22s ease, box-shadow 0.22s ease, border-color 0.22s ease;
        }
        .card-hover:hover {
            transform: translateY(-3px);
            box-shadow: var(--shadow-lg);
            border-color: var(--brand-blue);
        }

        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 0.4rem;
            background-color: var(--accent-orange);
            color: #fff;
            font-weight: 600;
            padding: 0.65rem 1.5rem;
            border-radius: var(--radius-md);
            border: none;
            transition: background-color 0.2s, box-shadow 0.2s, transform 0.15s;
            box-shadow: var(--shadow-sm);
            white-space: nowrap;
        }
        .btn-primary:hover {
            background-color: #EA580C;
            box-shadow: var(--shadow-md);
            transform: translateY(-1px);
        }
        .btn-primary:active {
            transform: translateY(0);
            box-shadow: var(--shadow-sm);
        }
        .btn-primary:focus-visible {
            outline: 3px solid rgba(249, 115, 22, 0.45);
            outline-offset: 2px;
        }

        .btn-secondary {
            display: inline-flex;
            align-items: center;
            gap: 0.4rem;
            background-color: #fff;
            color: var(--brand-blue);
            font-weight: 600;
            padding: 0.6rem 1.4rem;
            border-radius: var(--radius-md);
            border: 1.5px solid var(--brand-blue);
            transition: background-color 0.2s, color 0.2s, transform 0.15s;
            white-space: nowrap;
        }
        .btn-secondary:hover {
            background-color: #EFF6FF;
            transform: translateY(-1px);
        }
        .btn-secondary:focus-visible {
            outline: 3px solid rgba(37, 99, 235, 0.4);
            outline-offset: 2px;
        }

        .tag-live {
            display: inline-flex;
            align-items: center;
            gap: 4px;
            background-color: var(--accent-orange);
            color: #fff;
            padding: 2px 8px;
            border-radius: 4px;
            font-size: 0.7rem;
            font-weight: 700;
            letter-spacing: 0.03em;
            animation: pulseSoft 2.5s ease-in-out infinite;
        }
        .tag-new {
            display: inline-block;
            background-color: #EF4444;
            color: #fff;
            padding: 1px 7px;
            border-radius: 3px;
            font-size: 0.68rem;
            font-weight: 700;
        }
        .tag-hot {
            display: inline-block;
            background-color: #F59E0B;
            color: #fff;
            padding: 1px 7px;
            border-radius: 3px;
            font-size: 0.68rem;
            font-weight: 700;
        }
        .tag-rec {
            display: inline-block;
            background-color: var(--accent-cyan);
            color: #fff;
            padding: 1px 7px;
            border-radius: 3px;
            font-size: 0.68rem;
            font-weight: 700;
        }

        .tool-icon-circle {
            width: 52px;
            height: 52px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.35rem;
            font-weight: 700;
            flex-shrink: 0;
            color: #fff;
            box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
            transition: transform 0.2s;
        }
        .card-hover:hover .tool-icon-circle {
            transform: scale(1.06);
        }

        .mobile-nav-panel {
            position: fixed;
            top: 0;
            right: 0;
            width: 280px;
            max-width: 82vw;
            height: 100vh;
            height: 100dvh;
            background: #fff;
            z-index: 45;
            transform: translateX(100%);
            transition: transform 0.32s cubic-bezier(0.4, 0, 0.2, 1);
            box-shadow: -4px 0 24px rgba(0, 0, 0, 0.13);
            padding: 5rem 1.5rem 2rem;
            display: flex;
            flex-direction: column;
            gap: 0.5rem;
            overflow-y: auto;
        }
        .mobile-nav-panel.open {
            transform: translateX(0);
        }
        .mobile-nav-overlay {
            position: fixed;
            inset: 0;
            background: rgba(15, 23, 42, 0.5);
            z-index: 44;
            opacity: 0;
            pointer-events: none;
            transition: opacity 0.3s ease;
        }
        .mobile-nav-overlay.show {
            opacity: 1;
            pointer-events: auto;
        }
        .mobile-nav-panel a {
            display: block;
            padding: 0.75rem 1rem;
            border-radius: 8px;
            font-size: 1rem;
            font-weight: 500;
            color: #334155;
            transition: background-color 0.15s, color 0.15s;
        }
        .mobile-nav-panel a:hover,
        .mobile-nav-panel a.mobile-active {
            background-color: #EFF6FF;
            color: var(--brand-blue);
            font-weight: 600;
        }
        .mobile-nav-panel .mobile-cta {
            margin-top: 0.75rem;
            background-color: var(--accent-orange);
            color: #fff;
            text-align: center;
            font-weight: 600;
            border-radius: 24px;
            padding: 0.7rem 1.2rem;
        }
        .mobile-nav-panel .mobile-cta:hover {
            background-color: #EA580C;
            color: #fff;
        }

        @media (min-width: 1024px) {
            .desktop-nav-links {
                display: flex !important;
            }
            .mobile-nav-trigger {
                display: none !important;
            }
            .mobile-nav-panel,
            .mobile-nav-overlay {
                display: none !important;
            }
        }
        @media (max-width: 1023px) {
            .desktop-nav-links {
                display: none !important;
            }
            .mobile-nav-trigger {
                display: flex !important;
            }
        }

        .faq-item summary {
            cursor: pointer;
            list-style: none;
            padding: 1rem 0;
            font-weight: 600;
            font-size: 1.05rem;
            color: var(--text-heading);
            border-bottom: 1px solid var(--border-light);
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 1rem;
            transition: color 0.2s;
        }
        .faq-item summary::-webkit-details-marker {
            display: none;
        }
        .faq-item summary:hover {
            color: var(--brand-blue);
        }
        .faq-item summary .faq-arrow {
            transition: transform 0.25s ease;
            flex-shrink: 0;
            font-size: 0.85rem;
            color: #94A3B8;
        }
        .faq-item[open] summary .faq-arrow {
            transform: rotate(180deg);
            color: var(--brand-blue);
        }
        .faq-item .faq-answer {
            padding: 0.75rem 0 1rem;
            color: var(--text-body);
            line-height: 1.7;
            font-size: 0.95rem;
        }

/* roulang page: category4 */
:root {
            --brand-blue: #2563EB;
            --brand-blue-deep: #1E40AF;
            --accent-orange: #F97316;
            --accent-cyan: #06B6D4;
            --surface-light: #F8FAFC;
            --surface-card: #FFFFFF;
            --text-heading: #0F172A;
            --text-body: #334155;
            --text-muted: #64748B;
            --radius-card: 12px;
            --radius-btn: 8px;
            --shadow-card: 0 4px 12px rgba(15, 23, 42, 0.08);
            --shadow-card-hover: 0 16px 36px rgba(15, 23, 42, 0.14);
            --transition-base: 200ms ease;
        }

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

        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        body {
            font-family: 'system-ui', '-apple-system', 'Segoe UI', 'Roboto', 'Helvetica Neue', 'Noto Sans', 'PingFang SC', 'Microsoft YaHei', sans-serif;
            line-height: 1.7;
            color: var(--text-body);
            background-color: var(--surface-light);
            margin: 0;
            padding: 0;
        }

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

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

        button {
            cursor: pointer;
            font-family: inherit;
        }

        input {
            font-family: inherit;
        }

        .container-main {
            max-width: 1280px;
            margin-left: auto;
            margin-right: auto;
            padding-left: 1rem;
            padding-right: 1rem;
        }

        @media (min-width: 640px) {
            .container-main {
                padding-left: 1.5rem;
                padding-right: 1.5rem;
            }
        }
        @media (min-width: 1024px) {
            .container-main {
                padding-left: 2rem;
                padding-right: 2rem;
            }
        }

        /* 桌面导航可见，移动端隐藏 */
        .desktop-nav-links {
            display: none;
        }
        @media (min-width: 1024px) {
            .desktop-nav-links {
                display: flex;
            }
        }

        /* 移动端汉堡按钮 */
        .mobile-nav-trigger {
            display: flex;
        }
        @media (min-width: 1024px) {
            .mobile-nav-trigger {
                display: none;
            }
        }

        /* 移动端菜单面板 */
        #mobile-menu-panel {
            position: fixed;
            top: 0;
            right: 0;
            width: 100%;
            max-width: 360px;
            height: 100vh;
            height: 100dvh;
            background: #fff;
            z-index: 100;
            transform: translateX(100%);
            transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            box-shadow: -8px 0 30px rgba(15, 23, 42, 0.15);
            overflow-y: auto;
            padding: 1.5rem;
            display: flex;
            flex-direction: column;
            gap: 0.5rem;
        }
        #mobile-menu-panel.open {
            transform: translateX(0);
        }
        #mobile-overlay {
            position: fixed;
            inset: 0;
            background: rgba(15, 23, 42, 0.5);
            z-index: 99;
            opacity: 0;
            pointer-events: none;
            transition: opacity 0.3s ease;
        }
        #mobile-overlay.open {
            opacity: 1;
            pointer-events: auto;
        }
        #mobile-menu-panel a {
            display: block;
            padding: 0.75rem 1rem;
            border-radius: 8px;
            font-size: 1.05rem;
            font-weight: 500;
            color: #334155;
            transition: background 0.15s, color 0.15s;
        }
        #mobile-menu-panel a:hover,
        #mobile-menu-panel a.mobile-active {
            background: #eff6ff;
            color: #2563EB;
            font-weight: 600;
        }
        #mobile-menu-panel .mobile-cta-btn {
            background: #F97316;
            color: #fff;
            text-align: center;
            border-radius: 999px;
            font-weight: 600;
            margin-top: 0.5rem;
            padding: 0.7rem 1rem;
        }
        #mobile-menu-panel .mobile-cta-btn:hover {
            background: #ea580c;
            color: #fff;
        }

        /* 卡片悬停 */
        .tool-card {
            transition: transform 0.25s ease, box-shadow 0.25s ease, border-color 0.25s ease;
        }
        .tool-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-card-hover);
            border-color: #bfdbfe;
        }

        /* FAQ 手风琴 */
        .faq-item {
            border-bottom: 1px solid #e2e8f0;
            transition: background 0.2s;
        }
        .faq-item:last-child {
            border-bottom: none;
        }
        .faq-question {
            cursor: pointer;
            user-select: none;
            transition: color 0.2s;
        }
        .faq-question:hover {
            color: #2563EB;
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease, padding 0.4s ease;
        }
        .faq-item.open .faq-answer {
            max-height: 500px;
            padding-bottom: 1rem;
        }
        .faq-icon {
            transition: transform 0.3s ease;
        }
        .faq-item.open .faq-icon {
            transform: rotate(180deg);
        }

        /* 标签动画 */
        .live-dot {
            display: inline-block;
            width: 8px;
            height: 8px;
            border-radius: 50%;
            background: #F97316;
            animation: pulseSoft 2.2s ease-in-out infinite;
            margin-right: 4px;
        }

        /* 按钮 */
        .btn-primary {
            background: #F97316;
            color: #fff;
            font-weight: 600;
            padding: 0.7rem 1.6rem;
            border-radius: 8px;
            border: none;
            box-shadow: 0 2px 8px rgba(249, 115, 22, 0.25);
            transition: all 0.2s ease;
            display: inline-flex;
            align-items: center;
            gap: 0.4rem;
        }
        .btn-primary:hover {
            background: #ea580c;
            box-shadow: 0 6px 18px rgba(249, 115, 22, 0.35);
            transform: translateY(-1px);
        }
        .btn-secondary {
            background: #fff;
            color: #2563EB;
            font-weight: 600;
            padding: 0.65rem 1.5rem;
            border-radius: 8px;
            border: 1.5px solid #2563EB;
            transition: all 0.2s ease;
            display: inline-flex;
            align-items: center;
            gap: 0.4rem;
        }
        .btn-secondary:hover {
            background: #eff6ff;
            border-color: #1E40AF;
            color: #1E40AF;
        }

        /* 趋势箭头 */
        .trend-up-arrow::before {
            content: '▲';
            font-size: 0.7em;
            color: #10B981;
        }
        .trend-down-arrow::before {
            content: '▼';
            font-size: 0.7em;
            color: #EF4444;
        }

        /* 自定义滚动条 */
        ::-webkit-scrollbar {
            width: 6px;
        }
        ::-webkit-scrollbar-track {
            background: #f1f5f9;
        }
        ::-webkit-scrollbar-thumb {
            background: #cbd5e1;
            border-radius: 3px;
        }

/* roulang page: category2 */
:root {
            --brand-blue: #2563EB;
            --brand-blue-deep: #1E40AF;
            --accent-orange: #F97316;
            --accent-cyan: #06B6D4;
            --surface: #F8FAFC;
            --card: #FFFFFF;
            --stripe: #F1F5F9;
            --headline: #0F172A;
            --body-text: #334155;
            --muted: #64748B;
            --success: #10B981;
            --negative: #EF4444;
            --radius-sm: 6px;
            --radius-md: 8px;
            --radius-lg: 12px;
            --radius-xl: 16px;
            --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
            --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.06);
            --shadow-lg: 0 12px 28px rgba(0, 0, 0, 0.10);
            --shadow-xl: 0 20px 40px rgba(0, 0, 0, 0.12);
        }

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

        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        body {
            font-family: system-ui, -apple-system, 'Segoe UI', Roboto, 'Helvetica Neue', 'Noto Sans', 'PingFang SC', 'Microsoft YaHei', sans-serif;
            line-height: 1.6;
            background-color: #F8FAFC;
            color: #334155;
            margin: 0;
            padding: 0;
        }

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

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

        button {
            cursor: pointer;
            font-family: inherit;
        }

        input {
            font-family: inherit;
        }

        .container-main {
            max-width: 1280px;
            margin: 0 auto;
            padding-left: 1rem;
            padding-right: 1rem;
        }

        @media (min-width: 640px) {
            .container-main {
                padding-left: 1.5rem;
                padding-right: 1.5rem;
            }
        }
        @media (min-width: 1024px) {
            .container-main {
                padding-left: 2rem;
                padding-right: 2rem;
            }
        }

        .card-hover {
            transition: transform 0.25s ease, box-shadow 0.25s ease, border-color 0.25s ease;
        }
        .card-hover:hover {
            transform: translateY(-3px);
            box-shadow: var(--shadow-lg);
            border-color: #BFDBFE;
        }

        .btn-primary {
            background-color: #F97316;
            color: #fff;
            font-weight: 600;
            padding: 0.625rem 1.5rem;
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-sm);
            transition: all 0.2s ease;
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            border: none;
            cursor: pointer;
        }
        .btn-primary:hover {
            background-color: #EA580C;
            box-shadow: var(--shadow-md);
            transform: translateY(-1px);
        }
        .btn-primary:focus-visible {
            outline: 3px solid rgba(249, 115, 22, 0.5);
            outline-offset: 2px;
        }

        .btn-secondary {
            background-color: #fff;
            color: #2563EB;
            font-weight: 600;
            padding: 0.625rem 1.5rem;
            border-radius: var(--radius-md);
            border: 1.5px solid #2563EB;
            transition: all 0.2s ease;
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            cursor: pointer;
        }
        .btn-secondary:hover {
            background-color: #EFF6FF;
            border-color: #1E40AF;
            color: #1E40AF;
        }
        .btn-secondary:focus-visible {
            outline: 3px solid rgba(37, 99, 235, 0.4);
            outline-offset: 2px;
        }

        .tag-live {
            background-color: #F97316;
            color: #fff;
            padding: 0.15rem 0.5rem;
            border-radius: 4px;
            font-size: 0.7rem;
            font-weight: 700;
            letter-spacing: 0.02em;
            animation: livePulse 2s ease-in-out infinite;
        }
        @keyframes livePulse {
            0%,
            100% {
                opacity: 1;
            }
            50% {
                opacity: 0.65;
            }
        }

        .tag-new {
            background-color: #EF4444;
            color: #fff;
            padding: 0.15rem 0.5rem;
            border-radius: 4px;
            font-size: 0.7rem;
            font-weight: 700;
        }
        .tag-hot {
            background-color: #F59E0B;
            color: #fff;
            padding: 0.15rem 0.5rem;
            border-radius: 4px;
            font-size: 0.7rem;
            font-weight: 700;
        }
        .tag-recommend {
            background-color: #06B6D4;
            color: #fff;
            padding: 0.15rem 0.5rem;
            border-radius: 4px;
            font-size: 0.7rem;
            font-weight: 700;
        }

        .desktop-nav-links {
            display: none;
        }
        @media (min-width: 1024px) {
            .desktop-nav-links {
                display: flex;
            }
        }

        .mobile-nav-trigger {
            display: flex;
        }
        @media (min-width: 1024px) {
            .mobile-nav-trigger {
                display: none;
            }
        }

        #mobile-menu-panel {
            position: fixed;
            top: 0;
            right: -100%;
            width: 80%;
            max-width: 360px;
            height: 100vh;
            background: #fff;
            z-index: 100;
            transition: right 0.35s cubic-bezier(0.4, 0, 0.2, 1);
            box-shadow: -8px 0 30px rgba(0, 0, 0, 0.15);
            padding: 5rem 1.5rem 2rem;
            display: flex;
            flex-direction: column;
            gap: 0.75rem;
            overflow-y: auto;
        }
        #mobile-menu-panel.active {
            right: 0;
        }
        #mobile-menu-overlay {
            position: fixed;
            inset: 0;
            background: rgba(15, 23, 42, 0.55);
            z-index: 98;
            opacity: 0;
            pointer-events: none;
            transition: opacity 0.35s ease;
        }
        #mobile-menu-overlay.active {
            opacity: 1;
            pointer-events: auto;
        }
        #mobile-menu-panel a {
            display: block;
            padding: 0.75rem 1rem;
            font-size: 1.05rem;
            font-weight: 600;
            color: #334155;
            border-radius: var(--radius-md);
            transition: all 0.2s ease;
        }
        #mobile-menu-panel a:hover {
            background: #F1F5F9;
            color: #2563EB;
        }
        #mobile-menu-panel a.active-mobile {
            background: #EFF6FF;
            color: #2563EB;
        }

        .section-spacing {
            padding-top: 4rem;
            padding-bottom: 4rem;
        }
        @media (min-width: 768px) {
            .section-spacing {
                padding-top: 5rem;
                padding-bottom: 5rem;
            }
        }

        .hero-overlay-bg {
            background: linear-gradient(135deg, rgba(15, 23, 42, 0.82) 0%, rgba(30, 58, 138, 0.7) 60%, rgba(37, 99, 235, 0.55) 100%);
        }

        .faq-item {
            border-bottom: 1px solid #E2E8F0;
            cursor: pointer;
            transition: all 0.2s ease;
        }
        .faq-item:hover {
            background-color: #F8FAFC;
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease, padding 0.4s ease;
        }
        .faq-item.open .faq-answer {
            max-height: 500px;
            padding-bottom: 1rem;
        }
        .faq-item.open .faq-icon {
            transform: rotate(180deg);
        }
        .faq-icon {
            transition: transform 0.35s ease;
            flex-shrink: 0;
        }

        .pagination-btn {
            width: 40px;
            height: 40px;
            border-radius: var(--radius-md);
            display: inline-flex;
            align-items: center;
            justify-content: center;
            font-weight: 600;
            font-size: 0.9rem;
            transition: all 0.2s ease;
            border: 1px solid #E2E8F0;
            background: #fff;
            color: #334155;
            cursor: pointer;
        }
        .pagination-btn:hover {
            background: #EFF6FF;
            border-color: #2563EB;
            color: #2563EB;
        }
        .pagination-btn.active-page {
            background: #2563EB;
            color: #fff;
            border-color: #2563EB;
            pointer-events: none;
        }

        @media (max-width: 639px) {
            .hero-min-h {
                min-height: 320px;
            }
            .headline-card-grid {
                grid-template-columns: 1fr;
            }
        }

/* roulang page: category5 */
:root {
            --brand-blue: #2563EB;
            --brand-blue-deep: #1E40AF;
            --accent-orange: #F97316;
            --accent-cyan: #06B6D4;
            --slate-50: #F8FAFC;
            --slate-100: #F1F5F9;
            --slate-200: #E2E8F0;
            --slate-300: #CBD5E1;
            --slate-400: #94A3B8;
            --slate-500: #64748B;
            --slate-600: #475569;
            --slate-700: #334155;
            --slate-800: #1E293B;
            --slate-900: #0F172A;
            --emerald-500: #10B981;
            --red-500: #EF4444;
            --amber-500: #F59E0B;
            --cyan-500: #06B6D4;
            --radius-sm: 6px;
            --radius-md: 8px;
            --radius-lg: 12px;
            --radius-xl: 16px;
            --radius-2xl: 20px;
            --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
            --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.08);
            --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.12);
            --shadow-xl: 0 12px 36px rgba(0, 0, 0, 0.16);
        }

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

        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        body {
            margin: 0;
            padding: 0;
            font-family: 'system-ui', '-apple-system', 'Segoe UI', 'Roboto', 'Helvetica Neue', 'Noto Sans', 'PingFang SC', 'Microsoft YaHei', sans-serif;
            line-height: 1.6;
            background-color: #F8FAFC;
            color: #334155;
            min-height: 100vh;
        }

        a {
            text-decoration: none;
            color: inherit;
            transition: color 0.2s ease, background-color 0.2s ease;
        }

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

        button {
            cursor: pointer;
            font-family: inherit;
        }

        input {
            font-family: inherit;
        }

        .container-main {
            max-width: 1280px;
            margin-left: auto;
            margin-right: auto;
            padding-left: 1rem;
            padding-right: 1rem;
        }

        @media (min-width: 640px) {
            .container-main {
                padding-left: 1.5rem;
                padding-right: 1.5rem;
            }
        }
        @media (min-width: 1024px) {
            .container-main {
                padding-left: 2rem;
                padding-right: 2rem;
            }
        }

        .desktop-nav-links {
            display: none;
        }
        @media (min-width: 1024px) {
            .desktop-nav-links {
                display: flex;
            }
        }

        .mobile-nav-trigger {
            display: flex;
        }
        @media (min-width: 1024px) {
            .mobile-nav-trigger {
                display: none;
            }
        }

        /* 移动端菜单面板 */
        .mobile-menu-panel {
            position: fixed;
            top: 0;
            right: -100%;
            width: 280px;
            height: 100vh;
            height: 100dvh;
            background: #fff;
            z-index: 60;
            padding: 1.5rem;
            transition: right 0.35s cubic-bezier(0.4, 0, 0.2, 1);
            box-shadow: -4px 0 24px rgba(0, 0, 0, 0.15);
            overflow-y: auto;
            display: flex;
            flex-direction: column;
            gap: 0.75rem;
        }
        .mobile-menu-panel.open {
            right: 0;
        }
        .mobile-menu-panel a {
            display: block;
            padding: 0.75rem 1rem;
            border-radius: 8px;
            font-size: 1rem;
            font-weight: 500;
            color: #334155;
            transition: all 0.2s ease;
        }
        .mobile-menu-panel a:hover,
        .mobile-menu-panel a.mobile-active {
            background: #EFF6FF;
            color: #2563EB;
            font-weight: 600;
        }
        .mobile-menu-overlay {
            position: fixed;
            inset: 0;
            background: rgba(0, 0, 0, 0.4);
            z-index: 55;
            opacity: 0;
            pointer-events: none;
            transition: opacity 0.35s ease;
        }
        .mobile-menu-overlay.show {
            opacity: 1;
            pointer-events: auto;
        }

        /* 自定义卡片悬停 */
        .card-hover-lift {
            transition: transform 0.25s ease, box-shadow 0.25s ease;
        }
        .card-hover-lift:hover {
            transform: translateY(-3px);
            box-shadow: var(--shadow-lg);
        }

        /* 星级评分 */
        .star-rating {
            display: inline-flex;
            gap: 2px;
        }
        .star-rating .star {
            width: 16px;
            height: 16px;
            color: #F97316;
            fill: currentColor;
        }
        .star-rating .star.empty {
            color: #CBD5E1;
        }

        /* 贡献者排名徽章 */
        .rank-badge {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 28px;
            height: 28px;
            border-radius: 50%;
            font-weight: 700;
            font-size: 0.8rem;
            flex-shrink: 0;
        }
        .rank-badge.gold {
            background: linear-gradient(135deg, #FBBF24, #F59E0B);
            color: #fff;
        }
        .rank-badge.silver {
            background: linear-gradient(135deg, #CBD5E1, #94A3B8);
            color: #fff;
        }
        .rank-badge.bronze {
            background: linear-gradient(135deg, #FCD34D, #D97706);
            color: #fff;
        }
        .rank-badge.normal {
            background: #E2E8F0;
            color: #64748B;
        }

        /* 论坛热度指示器 */
        .hot-indicator {
            display: inline-flex;
            align-items: center;
            gap: 3px;
            font-size: 0.7rem;
            font-weight: 600;
            padding: 2px 8px;
            border-radius: 20px;
            white-space: nowrap;
        }
        .hot-indicator.fire {
            background: #FEF2F2;
            color: #EF4444;
        }
        .hot-indicator.trending {
            background: #FFF7ED;
            color: #F97316;
        }
        .hot-indicator.new {
            background: #ECFDF5;
            color: #10B981;
        }

        /* FAQ手风琴 */
        .faq-item {
            border-bottom: 1px solid #E2E8F0;
        }
        .faq-question {
            width: 100%;
            text-align: left;
            padding: 1rem 0;
            font-size: 1.05rem;
            font-weight: 600;
            color: #1E293B;
            background: transparent;
            border: none;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 1rem;
            cursor: pointer;
            transition: color 0.2s;
        }
        .faq-question:hover {
            color: #2563EB;
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease, padding-bottom 0.4s ease;
            color: #475569;
            line-height: 1.7;
            font-size: 0.95rem;
        }
        .faq-item.open .faq-answer {
            max-height: 300px;
            padding-bottom: 1rem;
        }
        .faq-arrow {
            flex-shrink: 0;
            transition: transform 0.3s ease;
            color: #64748B;
            font-size: 1.2rem;
        }
        .faq-item.open .faq-arrow {
            transform: rotate(180deg);
            color: #2563EB;
        }

        /* 滚动条美化 */
        ::-webkit-scrollbar {
            width: 6px;
            height: 6px;
        }
        ::-webkit-scrollbar-track {
            background: #F1F5F9;
            border-radius: 3px;
        }
        ::-webkit-scrollbar-thumb {
            background: #CBD5E1;
            border-radius: 3px;
        }
        ::-webkit-scrollbar-thumb:hover {
            background: #94A3B8;
        }

        @media (max-width: 640px) {
            .review-grid {
                grid-template-columns: 1fr !important;
            }
            .topic-grid {
                grid-template-columns: 1fr !important;
            }
            .contributor-table-wrap {
                overflow-x: auto;
                -webkit-overflow-scrolling: touch;
            }
        }