/* roulang page: index */
:root {
      --primary-color: #1E40AF;
      --primary-hover: #1D4ED8;
      --secondary-color: #2563EB;
      --accent-color: #F59E0B;
      --accent-hover: #D97706;
      --bg-light: #F8FAFC;
      --bg-alt: #F1F5F9;
      --card-bg: #FFFFFF;
      --text-main: #0F172A;
      --text-muted: #475569;
      --text-sub: #64748B;
      --border-color: #E2E8F0;
      --card-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.05), 0 10px 15px -3px rgba(30, 64, 175, 0.07);
      --card-shadow-hover: 0 12px 24px -4px rgba(30, 64, 175, 0.15);
      --radius-sm: 6px;
      --radius-md: 10px;
      --radius-lg: 14px;
      --transition: all 0.28s cubic-bezier(0.4, 0, 0.2, 1);
    }

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

    body {
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", sans-serif;
      background-color: var(--bg-light);
      color: var(--text-main);
      line-height: 1.65;
      -webkit-font-smoothing: antialiased;
    }

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

    /* 顶部导航 */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(255, 255, 255, 0.94);
      backdrop-filter: blur(12px);
      -webkit-backdrop-filter: blur(12px);
      border-bottom: 1px solid var(--border-color);
      box-shadow: 0 2px 8px rgba(0,0,0,0.03);
    }
    .nav-container {
      max-width: 1240px;
      margin: 0 auto;
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 72px;
      padding: 0 20px;
    }
    .brand-logo {
      display: flex;
      align-items: center;
      gap: 10px;
      font-size: 1.28rem;
      font-weight: 800;
      color: var(--text-main);
      letter-spacing: -0.5px;
    }
    .brand-logo .brand-icon {
      width: 36px;
      height: 36px;
      background: linear-gradient(135deg, var(--secondary-color), var(--primary-color));
      color: #fff;
      border-radius: var(--radius-sm);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.1rem;
      box-shadow: 0 3px 8px rgba(37,99,235,0.3);
    }
    .nav-menu {
      display: flex;
      align-items: center;
      gap: 28px;
      list-style: none;
      margin: 0;
    }
    .nav-menu li a {
      font-size: 0.95rem;
      font-weight: 600;
      color: var(--text-muted);
      padding: 8px 4px;
      position: relative;
    }
    .nav-menu li a:hover,
    .nav-menu li.active a {
      color: var(--primary-color);
    }
    .nav-menu li.active a::after {
      content: "";
      position: absolute;
      bottom: -4px;
      left: 0;
      width: 100%;
      height: 2.5px;
      background: var(--primary-color);
      border-radius: 2px;
    }
    .nav-cta {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      background: var(--primary-color);
      color: #fff !important;
      padding: 10px 22px;
      font-size: 0.92rem;
      font-weight: 600;
      border-radius: var(--radius-sm);
      box-shadow: 0 4px 10px rgba(30,64,175,0.25);
    }
    .nav-cta:hover {
      background: var(--primary-hover);
      transform: translateY(-1px);
      box-shadow: 0 6px 14px rgba(30,64,175,0.3);
    }

    /* 页面基础容器与通用标题 */
    .content-wrapper {
      max-width: 1240px;
      margin: 0 auto;
      padding: 0 20px;
    }
    .section-block {
      padding: 85px 0;
      border-bottom: 1px solid rgba(226, 232, 240, 0.7);
    }
    .section-block.bg-alt {
      background-color: var(--bg-alt);
    }
    .section-header {
      text-align: center;
      margin-bottom: 50px;
      max-width: 820px;
      margin-left: auto;
      margin-right: auto;
    }
    .section-tag {
      display: inline-block;
      font-size: 0.82rem;
      font-weight: 700;
      text-transform: uppercase;
      letter-spacing: 1px;
      color: var(--primary-color);
      background: rgba(37,99,235,0.1);
      padding: 4px 14px;
      border-radius: 20px;
      margin-bottom: 12px;
    }
    .section-title {
      font-size: 2.1rem;
      font-weight: 800;
      color: var(--text-main);
      line-height: 1.35;
      margin-bottom: 16px;
    }
    .section-desc {
      font-size: 1.02rem;
      color: var(--text-muted);
      line-height: 1.7;
    }

    /* 板块1：Hero 前后对比首屏 */
    .hero-section {
      padding: 70px 0 85px;
      background: linear-gradient(180deg, #FFFFFF 0%, var(--bg-light) 100%);
    }
    .hero-h1 {
      font-size: 2.6rem;
      font-weight: 900;
      color: var(--text-main);
      line-height: 1.25;
      margin-bottom: 20px;
      letter-spacing: -0.5px;
    }
    .hero-h1 span {
      color: var(--primary-color);
    }
    .hero-intro {
      font-size: 1.05rem;
      color: var(--text-muted);
      line-height: 1.8;
      margin-bottom: 30px;
    }
    .hero-actions {
      display: flex;
      align-items: center;
      gap: 16px;
      margin-bottom: 35px;
      flex-wrap: wrap;
    }
    .btn-main {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      background: var(--primary-color);
      color: #fff !important;
      padding: 13px 30px;
      font-size: 1rem;
      font-weight: 700;
      border-radius: var(--radius-sm);
      box-shadow: 0 4px 12px rgba(30, 64, 175, 0.3);
      transition: var(--transition);
    }
    .btn-main:hover {
      background: var(--primary-hover);
      transform: translateY(-2px);
      box-shadow: 0 8px 20px rgba(30, 64, 175, 0.35);
    }
    .btn-ghost {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      background: #FFFFFF;
      color: var(--text-main) !important;
      border: 1px solid var(--border-color);
      padding: 13px 26px;
      font-size: 1rem;
      font-weight: 600;
      border-radius: var(--radius-sm);
      box-shadow: 0 2px 6px rgba(0,0,0,0.04);
      transition: var(--transition);
    }
    .btn-ghost:hover {
      border-color: var(--primary-color);
      color: var(--primary-color) !important;
      transform: translateY(-2px);
    }

    /* Before vs After 并置容器 */
    .compare-hero-box {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 20px;
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 24px;
      box-shadow: var(--card-shadow);
    }
    .compare-pane {
      border-radius: var(--radius-md);
      padding: 24px 20px;
      position: relative;
    }
    .pane-before {
      background: #F8FAFC;
      border: 1px dashed #CBD5E1;
    }
    .pane-after {
      background: #EFF6FF;
      border: 1px solid #BFDBFE;
    }
    .pane-badge {
      display: inline-block;
      padding: 3px 10px;
      font-size: 0.78rem;
      font-weight: 700;
      border-radius: 4px;
      margin-bottom: 12px;
    }
    .badge-before {
      background: #E2E8F0;
      color: #64748B;
    }
    .badge-after {
      background: var(--primary-color);
      color: #FFFFFF;
    }
    .pane-title {
      font-size: 1.15rem;
      font-weight: 700;
      margin-bottom: 14px;
      color: var(--text-main);
    }
    .pane-list {
      list-style: none;
      margin: 0;
    }
    .pane-list li {
      font-size: 0.88rem;
      margin-bottom: 10px;
      display: flex;
      align-items: flex-start;
      gap: 8px;
      line-height: 1.5;
    }
    .pane-before li { color: #64748B; }
    .pane-after li { color: #1E3A8A; font-weight: 500; }
    .pane-before i { color: #EF4444; margin-top: 3px; }
    .pane-after i { color: #10B981; margin-top: 3px; }

    /* 通用网格与卡片 */
    .grid-3 {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .grid-4 {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
    }
    .grid-2 {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 28px;
    }

    .base-card {
      background: var(--card-bg);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 28px 24px;
      box-shadow: var(--card-shadow);
      transition: var(--transition);
      position: relative;
    }
    .base-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--card-shadow-hover);
      border-color: #CBD5E1;
    }
    .card-icon-wrap {
      width: 52px;
      height: 52px;
      border-radius: var(--radius-md);
      background: rgba(37,99,235,0.08);
      color: var(--primary-color);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.4rem;
      margin-bottom: 20px;
    }
    .card-title {
      font-size: 1.2rem;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 12px;
    }
    .card-text {
      font-size: 0.92rem;
      color: var(--text-muted);
      line-height: 1.65;
    }

    /* 板块4：流媒体封面架风格卡片 */
    .media-shelf-card {
      background: var(--card-bg);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      overflow: hidden;
      box-shadow: var(--card-shadow);
      transition: var(--transition);
      display: flex;
      flex-direction: column;
    }
    .media-shelf-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--card-shadow-hover);
    }
    .media-cover-box {
      width: 100%;
      height: 150px;
      background: linear-gradient(135deg, #1E293B, #0F172A);
      position: relative;
      display: flex;
      align-items: center;
      justify-content: center;
      color: #FFFFFF;
    }
    .media-badge-pill {
      position: absolute;
      top: 12px;
      left: 12px;
      font-size: 0.75rem;
      font-weight: 700;
      background: rgba(30, 64, 175, 0.9);
      color: #FFFFFF;
      padding: 2px 8px;
      border-radius: 4px;
    }
    .media-status-pill {
      position: absolute;
      bottom: 12px;
      right: 12px;
      font-size: 0.72rem;
      font-weight: 600;
      background: rgba(0, 0, 0, 0.65);
      color: #34D399;
      padding: 2px 8px;
      border-radius: 4px;
      display: flex;
      align-items: center;
      gap: 4px;
    }
    .media-body {
      padding: 20px;
      display: flex;
      flex-direction: column;
      flex-grow: 1;
    }
    .media-title {
      font-size: 1.05rem;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 8px;
    }
    .media-desc {
      font-size: 0.88rem;
      color: var(--text-muted);
      line-height: 1.55;
      margin-bottom: 16px;
      flex-grow: 1;
    }
    .media-meter {
      display: flex;
      align-items: center;
      justify-content: space-between;
      font-size: 0.8rem;
      color: var(--text-sub);
      border-top: 1px solid var(--border-color);
      padding-top: 12px;
    }

    /* 板块5：社会认同与结果数据指标条 */
    .metric-item {
      text-align: center;
      padding: 20px;
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      box-shadow: var(--card-shadow);
    }
    .metric-number {
      font-size: 2.3rem;
      font-weight: 900;
      color: var(--primary-color);
      line-height: 1.2;
      margin-bottom: 6px;
      letter-spacing: -0.5px;
    }
    .metric-label {
      font-size: 0.92rem;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 4px;
    }
    .metric-sub {
      font-size: 0.8rem;
      color: var(--text-sub);
    }

    /* 板块6：方案对比差异表 */
    .table-responsive {
      width: 100%;
      overflow-x: auto;
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      box-shadow: var(--card-shadow);
    }
    .custom-compare-table {
      width: 100%;
      border-collapse: collapse;
      margin: 0;
      text-align: left;
    }
    .custom-compare-table th, 
    .custom-compare-table td {
      padding: 16px 20px;
      border-bottom: 1px solid var(--border-color);
      font-size: 0.92rem;
    }
    .custom-compare-table th {
      background: #F8FAFC;
      font-weight: 700;
      color: var(--text-main);
    }
    .custom-compare-table tr:last-child td {
      border-bottom: none;
    }
    .custom-compare-table .highlight-col {
      background: #EFF6FF;
      color: var(--primary-color);
      font-weight: 700;
    }

    /* 板块7：深度资讯证据链 */
    .evidence-hero-card {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 28px;
      box-shadow: var(--card-shadow);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }
    .evidence-list-pane {
      display: flex;
      flex-direction: column;
      gap: 16px;
    }
    .evidence-row-card {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 20px;
      box-shadow: 0 2px 4px rgba(0,0,0,0.03);
      transition: var(--transition);
    }
    .evidence-row-card:hover {
      border-color: var(--secondary-color);
      transform: translateX(4px);
    }

    /* 板块8：客户口碑与综合评测流 */
    .rating-stars {
      color: var(--accent-color);
      font-size: 0.85rem;
      margin-bottom: 12px;
    }
    .reviewer-meta {
      display: flex;
      align-items: center;
      gap: 12px;
      margin-top: 18px;
      padding-top: 14px;
      border-top: 1px solid var(--border-color);
    }
    .reviewer-avatar {
      width: 42px;
      height: 42px;
      border-radius: 50%;
      background: #E2E8F0;
      display: flex;
      align-items: center;
      justify-content: center;
      color: var(--primary-color);
      font-weight: 800;
      font-size: 0.95rem;
    }
    .reviewer-info h5 {
      font-size: 0.92rem;
      font-weight: 700;
      margin: 0;
      color: var(--text-main);
    }
    .reviewer-info p {
      font-size: 0.78rem;
      color: var(--text-sub);
      margin: 0;
    }

    /* 板块9：专属分类专题直达入口 */
    .taxonomy-portal-card {
      background: linear-gradient(135deg, #FFFFFF, #EFF6FF);
      border: 2px solid #BFDBFE;
      border-radius: var(--radius-lg);
      padding: 36px;
      box-shadow: var(--card-shadow);
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 30px;
    }
    .taxonomy-content {
      max-width: 720px;
    }
    .taxonomy-pills {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      margin-top: 16px;
    }
    .tax-pill {
      display: inline-block;
      background: #FFFFFF;
      border: 1px solid #BFDBFE;
      color: var(--primary-color);
      padding: 6px 14px;
      font-size: 0.85rem;
      font-weight: 600;
      border-radius: 20px;
    }

    /* 板块10：极速接入步骤 */
    .step-box {
      text-align: center;
      position: relative;
    }
    .step-number-bubble {
      width: 50px;
      height: 50px;
      background: var(--primary-color);
      color: #fff;
      font-size: 1.2rem;
      font-weight: 800;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      margin: 0 auto 20px;
      box-shadow: 0 4px 10px rgba(30,64,175,0.3);
    }

    /* 板块11：异议拆解 FAQ 折叠项 */
    .faq-container {
      max-width: 860px;
      margin: 0 auto;
    }
    .faq-item {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      margin-bottom: 14px;
      overflow: hidden;
      box-shadow: 0 2px 4px rgba(0,0,0,0.02);
    }
    .faq-question {
      padding: 20px 24px;
      font-size: 1.05rem;
      font-weight: 700;
      color: var(--text-main);
      cursor: pointer;
      display: flex;
      align-items: center;
      justify-content: space-between;
      background: #FFFFFF;
      transition: var(--transition);
    }
    .faq-question:hover {
      background: #F8FAFC;
    }
    .faq-answer {
      padding: 0 24px 20px;
      font-size: 0.94rem;
      color: var(--text-muted);
      line-height: 1.7;
    }

    /* 板块12：平台安全承诺条 */
    .guarantee-strip {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 30px;
      box-shadow: var(--card-shadow);
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .guarantee-unit {
      display: flex;
      align-items: flex-start;
      gap: 14px;
    }
    .guarantee-unit i {
      font-size: 1.6rem;
      color: #10B981;
      margin-top: 4px;
    }

    /* 板块13：底端主转化号召区 (Pre-footer Mega CTA) */
    .pre-footer-cta {
      background: linear-gradient(135deg, #1E40AF, #1E3A8A);
      border-radius: var(--radius-lg);
      padding: 60px 40px;
      text-align: center;
      color: #FFFFFF;
      box-shadow: 0 10px 25px rgba(30, 64, 175, 0.25);
    }
    .pre-footer-cta h2 {
      font-size: 2.2rem;
      font-weight: 800;
      margin-bottom: 16px;
      color: #FFFFFF;
    }
    .pre-footer-cta p {
      font-size: 1.05rem;
      max-width: 700px;
      margin: 0 auto 30px;
      color: #DBEAFE;
      line-height: 1.7;
    }

    /* 页脚 */
    .site-footer {
      background: #0F172A;
      color: #94A3B8;
      padding: 70px 0 35px;
      font-size: 0.9rem;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1.5fr;
      gap: 40px;
      margin-bottom: 50px;
    }
    .footer-brand h4 {
      color: #FFFFFF;
      font-size: 1.25rem;
      font-weight: 800;
      margin-bottom: 16px;
    }
    .footer-col h5 {
      color: #F8FAFC;
      font-size: 1rem;
      font-weight: 700;
      margin-bottom: 20px;
    }
    .footer-col ul {
      list-style: none;
      margin: 0;
    }
    .footer-col ul li {
      margin-bottom: 12px;
    }
    .footer-col ul li a {
      color: #94A3B8;
    }
    .footer-col ul li a:hover {
      color: #FFFFFF;
    }
    .footer-bottom {
      border-top: 1px solid #1E293B;
      padding-top: 30px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      flex-wrap: wrap;
      gap: 16px;
    }

    /* 底部固定转化条 */
    .sticky-conversion-bar {
      position: fixed;
      bottom: 0;
      left: 0;
      width: 100%;
      background: rgba(255, 255, 255, 0.96);
      backdrop-filter: blur(10px);
      border-top: 1px solid var(--border-color);
      box-shadow: 0 -4px 16px rgba(0, 0, 0, 0.08);
      z-index: 999;
      padding: 12px 0;
      display: block;
    }
    .sticky-bar-inner {
      max-width: 1240px;
      margin: 0 auto;
      padding: 0 20px;
      display: flex;
      align-items: center;
      justify-content: space-between;
    }
    .sticky-bar-title {
      font-size: 0.95rem;
      font-weight: 700;
      color: var(--text-main);
      display: flex;
      align-items: center;
      gap: 10px;
    }
    .sticky-bar-title .pulse-dot {
      width: 8px;
      height: 8px;
      background: #10B981;
      border-radius: 50%;
      display: inline-block;
      box-shadow: 0 0 0 2px rgba(16, 185, 129, 0.2);
    }

    /* 响应式断点 */
    @media (max-width: 1024px) {
      .grid-4 {
        grid-template-columns: repeat(2, 1fr);
      }
      .footer-grid {
        grid-template-columns: 1fr 1fr;
      }
      .taxonomy-portal-card {
        flex-direction: column;
        align-items: flex-start;
      }
    }

    @media (max-width: 768px) {
      .hero-h1 {
        font-size: 2rem;
      }
      .compare-hero-box {
        grid-template-columns: 1fr;
      }
      .grid-3, .grid-2 {
        grid-template-columns: 1fr;
      }
      .grid-4 {
        grid-template-columns: 1fr;
      }
      .nav-menu {
        display: none;
      }
      .guarantee-strip {
        grid-template-columns: 1fr;
      }
      .footer-grid {
        grid-template-columns: 1fr;
      }
      .section-block {
        padding: 60px 0;
      }
      .sticky-bar-inner {
        flex-direction: column;
        gap: 10px;
        text-align: center;
      }
    }

/* roulang page: category1 */
:root {
        --primary-color: #1E40AF;
        --primary-hover: #1D4ED8;
        --secondary-color: #2563EB;
        --accent-color: #F59E0B;
        --accent-hover: #D97706;
        --bg-light: #F8FAFC;
        --bg-alt: #F1F5F9;
        --card-bg: #FFFFFF;
        --text-main: #0F172A;
        --text-muted: #475569;
        --text-sub: #64748B;
        --border-color: #E2E8F0;
        --card-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.05), 0 10px 15px -3px rgba(30, 64, 175, 0.07);
        --card-shadow-hover: 0 12px 24px -4px rgba(30, 64, 175, 0.15);
        --radius-sm: 6px;
        --radius-md: 10px;
        --radius-lg: 14px;
        --transition: all 0.28s cubic-bezier(0.4, 0, 0.2, 1);
    }
    body {
        font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", sans-serif;
        background-color: var(--bg-light);
        color: var(--text-main);
        line-height: 1.65;
        -webkit-font-smoothing: antialiased;
        margin: 0;
        padding: 0;
    }
    a {
        color: var(--primary-color);
        text-decoration: none;
        transition: var(--transition);
    }
    a:hover {
        color: var(--primary-hover);
    }
    
    /* 顶部导航 */
    .site-header {
        position: sticky;
        top: 0;
        z-index: 1000;
        background: rgba(255, 255, 255, 0.94);
        backdrop-filter: blur(12px);
        -webkit-backdrop-filter: blur(12px);
        border-bottom: 1px solid var(--border-color);
        box-shadow: 0 2px 8px rgba(0,0,0,0.03);
    }
    .nav-container {
        max-width: 1240px;
        margin: 0 auto;
        display: flex;
        align-items: center;
        justify-content: space-between;
        height: 72px;
        padding: 0 20px;
    }
    .brand-logo {
        display: flex;
        align-items: center;
        gap: 10px;
        font-size: 1.28rem;
        font-weight: 800;
        color: var(--text-main);
        letter-spacing: -0.5px;
    }
    .brand-logo .brand-icon {
        width: 36px;
        height: 36px;
        background: linear-gradient(135deg, var(--secondary-color), var(--primary-color));
        color: #fff;
        border-radius: var(--radius-sm);
        display: flex;
        align-items: center;
        justify-content: center;
        font-size: 1.1rem;
        box-shadow: 0 3px 8px rgba(37,99,235,0.3);
    }
    .nav-menu {
        display: flex;
        align-items: center;
        gap: 28px;
        list-style: none;
        margin: 0;
    }
    .nav-menu li a {
        font-size: 0.95rem;
        font-weight: 600;
        color: var(--text-muted);
        padding: 8px 4px;
        position: relative;
    }
    .nav-menu li a:hover,
    .nav-menu li.active a {
        color: var(--primary-color);
    }
    .nav-menu li.active a::after {
        content: "";
        position: absolute;
        bottom: -4px;
        left: 0;
        width: 100%;
        height: 2.5px;
        background: var(--primary-color);
        border-radius: 2px;
    }
    .nav-cta {
        display: inline-flex;
        align-items: center;
        gap: 6px;
        background: var(--primary-color);
        color: #fff !important;
        padding: 10px 22px;
        font-size: 0.92rem;
        font-weight: 600;
        border-radius: var(--radius-sm);
        box-shadow: 0 4px 10px rgba(30,64,175,0.25);
    }
    .nav-cta:hover {
        background: var(--primary-hover);
        transform: translateY(-1px);
        box-shadow: 0 6px 14px rgba(30,64,175,0.3);
    }

    /* 容器规范 */
    .content-wrapper {
        max-width: 1240px;
        margin: 0 auto;
        padding: 0 20px;
    }
    .section-block {
        padding: 80px 0;
        border-bottom: 1px solid rgba(226, 232, 240, 0.7);
    }
    .section-block.bg-alt {
        background-color: var(--bg-alt);
    }
    .section-header {
        text-align: center;
        margin-bottom: 48px;
        max-width: 820px;
        margin-left: auto;
        margin-right: auto;
    }
    .section-tag {
        display: inline-block;
        font-size: 0.82rem;
        font-weight: 700;
        letter-spacing: 1px;
        color: var(--primary-color);
        background: rgba(37,99,235,0.1);
        padding: 4px 14px;
        border-radius: 20px;
        margin-bottom: 12px;
    }
    .section-title {
        font-size: 2.1rem;
        font-weight: 800;
        color: var(--text-main);
        line-height: 1.35;
        margin-bottom: 16px;
    }
    .section-desc {
        font-size: 1.02rem;
        color: var(--text-muted);
        line-height: 1.7;
    }

    /* 分类页板块1：头区与面包屑 */
    .category-header-wrap {
        padding: 45px 0 35px;
        background: #FFFFFF;
        border-bottom: 1px solid var(--border-color);
    }
    .breadcrumbs-list {
        display: flex;
        align-items: center;
        gap: 8px;
        list-style: none;
        margin: 0 0 16px;
        padding: 0;
        font-size: 0.88rem;
        color: var(--text-sub);
    }
    .breadcrumbs-list a {
        color: var(--text-muted);
    }
    .breadcrumbs-list a:hover {
        color: var(--primary-color);
    }
    .breadcrumbs-list .separator {
        color: #CBD5E1;
    }
    .category-h1 {
        font-size: 2.4rem;
        font-weight: 900;
        color: var(--text-main);
        line-height: 1.25;
        margin-bottom: 14px;
        letter-spacing: -0.5px;
    }
    .category-h1 span {
        color: var(--primary-color);
    }
    .category-meta-info {
        display: flex;
        align-items: center;
        gap: 24px;
        flex-wrap: wrap;
        font-size: 0.92rem;
        color: var(--text-muted);
    }
    .category-meta-info span {
        display: inline-flex;
        align-items: center;
        gap: 6px;
    }
    .category-meta-info strong {
        color: var(--text-main);
    }

    /* 分类页板块2：多维筛选栏 */
    .filter-section {
        background: #FFFFFF;
        border: 1px solid var(--border-color);
        border-radius: var(--radius-md);
        padding: 24px 28px;
        box-shadow: 0 2px 6px rgba(0,0,0,0.02);
        margin: 35px 0 45px;
    }
    .filter-row {
        display: flex;
        align-items: flex-start;
        padding: 10px 0;
        border-bottom: 1px dashed var(--border-color);
    }
    .filter-row:last-child {
        border-bottom: none;
        padding-bottom: 0;
    }
    .filter-label {
        width: 100px;
        font-size: 0.88rem;
        font-weight: 700;
        color: var(--text-muted);
        padding-top: 6px;
        flex-shrink: 0;
    }
    .filter-options {
        display: flex;
        flex-wrap: wrap;
        gap: 8px;
        flex-grow: 1;
    }
    .filter-btn {
        display: inline-block;
        font-size: 0.85rem;
        font-weight: 600;
        padding: 5px 14px;
        border-radius: 20px;
        background: transparent;
        color: var(--text-muted);
        border: 1px solid transparent;
        cursor: pointer;
        transition: var(--transition);
    }
    .filter-btn:hover {
        background: var(--bg-alt);
        color: var(--primary-color);
    }
    .filter-btn.active {
        background: var(--primary-color);
        color: #FFFFFF;
    }

    /* 分类页板块3：流媒体核心陈列卡片架 */
    .media-card {
        background: var(--card-bg);
        border: 1px solid var(--border-color);
        border-radius: var(--radius-md);
        overflow: hidden;
        box-shadow: var(--card-shadow);
        transition: var(--transition);
        display: flex;
        flex-direction: column;
        height: 100%;
        position: relative;
    }
    .media-card:hover {
        transform: translateY(-4px);
        box-shadow: var(--card-shadow-hover);
        border-color: #BFDBFE;
    }
    .media-poster-wrap {
        position: relative;
        width: 100%;
        padding-top: 56.25%; /* 16:9 ratio */
        background: #0F172A;
        overflow: hidden;
    }
    .media-poster {
        position: absolute;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        object-fit: cover;
        opacity: 0.92;
        transition: transform 0.4s ease;
    }
    .media-card:hover .media-poster {
        transform: scale(1.05);
    }
    .poster-pill-badge {
        position: absolute;
        top: 12px;
        left: 12px;
        background: rgba(15, 23, 42, 0.75);
        backdrop-filter: blur(4px);
        color: #FFFFFF;
        font-size: 0.75rem;
        font-weight: 700;
        padding: 3px 10px;
        border-radius: 12px;
        border: 1px solid rgba(255, 255, 255, 0.2);
    }
    .poster-status-tag {
        position: absolute;
        bottom: 12px;
        right: 12px;
        background: var(--accent-color);
        color: #FFFFFF;
        font-size: 0.72rem;
        font-weight: 700;
        padding: 2px 8px;
        border-radius: 4px;
        box-shadow: 0 2px 6px rgba(0,0,0,0.3);
    }
    .media-content {
        padding: 18px 20px;
        display: flex;
        flex-direction: column;
        flex-grow: 1;
    }
    .media-title {
        font-size: 1.05rem;
        font-weight: 800;
        color: var(--text-main);
        line-height: 1.4;
        margin-bottom: 8px;
    }
    .media-desc {
        font-size: 0.85rem;
        color: var(--text-muted);
        line-height: 1.6;
        margin-bottom: 14px;
        flex-grow: 1;
    }
    .media-footer-info {
        display: flex;
        align-items: center;
        justify-content: space-between;
        padding-top: 12px;
        border-top: 1px solid var(--border-color);
        font-size: 0.78rem;
        color: var(--text-sub);
    }
    .media-action-trigger {
        font-size: 0.84rem;
        font-weight: 700;
        color: var(--primary-color);
        display: inline-flex;
        align-items: center;
        gap: 4px;
    }
    .media-action-trigger:hover {
        color: var(--primary-hover);
        text-decoration: underline;
    }
    .shelf-load-more-wrap {
        text-align: center;
        margin-top: 48px;
    }
    .btn-shelf-more {
        display: inline-flex;
        align-items: center;
        gap: 8px;
        background: #FFFFFF;
        color: var(--primary-color) !important;
        border: 2px solid var(--primary-color);
        padding: 12px 34px;
        font-size: 0.95rem;
        font-weight: 700;
        border-radius: var(--radius-sm);
        transition: var(--transition);
    }
    .btn-shelf-more:hover {
        background: var(--primary-color);
        color: #FFFFFF !important;
        box-shadow: 0 6px 16px rgba(30, 64, 175, 0.25);
    }

    /* 分类页板块4：热度排行榜 Top 5 */
    .leaderboard-container {
        display: grid;
        grid-template-columns: repeat(5, 1fr);
        gap: 16px;
    }
    .rank-card {
        background: #FFFFFF;
        border: 1px solid var(--border-color);
        border-radius: var(--radius-md);
        padding: 20px 16px;
        position: relative;
        box-shadow: 0 2px 6px rgba(0,0,0,0.03);
        transition: var(--transition);
    }
    .rank-card:hover {
        transform: translateY(-3px);
        box-shadow: var(--card-shadow-hover);
        border-color: var(--secondary-color);
    }
    .rank-number {
        font-size: 1.8rem;
        font-weight: 900;
        line-height: 1;
        margin-bottom: 10px;
        font-style: italic;
    }
    .rank-number.top1 { color: #DC2626; }
    .rank-number.top2 { color: #EA580C; }
    .rank-number.top3 { color: #D97706; }
    .rank-number.top-other { color: var(--text-sub); }
    .rank-title {
        font-size: 0.95rem;
        font-weight: 700;
        color: var(--text-main);
        margin-bottom: 8px;
        line-height: 1.4;
    }
    .rank-score {
        display: flex;
        align-items: center;
        gap: 5px;
        font-size: 0.8rem;
        color: var(--accent-color);
        font-weight: 700;
        margin-bottom: 10px;
    }
    .rank-meta {
        font-size: 0.76rem;
        color: var(--text-sub);
        line-height: 1.5;
    }

    /* 分类页板块5：深度专题解读 */
    .deep-dive-card {
        background: #FFFFFF;
        border: 1px solid var(--border-color);
        border-radius: var(--radius-lg);
        overflow: hidden;
        box-shadow: var(--card-shadow);
        display: grid;
        grid-template-columns: 1fr 1fr;
    }
    .deep-dive-image {
        position: relative;
        min-height: 360px;
        background: linear-gradient(135deg, #1E3A8A, #0F172A);
        display: flex;
        flex-direction: column;
        justify-content: flex-end;
        padding: 36px;
        color: #FFFFFF;
    }
    .deep-dive-body {
        padding: 42px 38px;
        display: flex;
        flex-direction: column;
        justify-content: center;
    }
    .deep-dive-body h3 {
        font-size: 1.65rem;
        font-weight: 800;
        color: var(--text-main);
        margin-bottom: 16px;
        line-height: 1.35;
    }
    .deep-dive-body p {
        font-size: 0.96rem;
        color: var(--text-muted);
        line-height: 1.75;
        margin-bottom: 22px;
    }
    .deep-dive-points {
        list-style: none;
        margin: 0 0 24px;
        padding: 0;
    }
    .deep-dive-points li {
        display: flex;
        align-items: center;
        gap: 10px;
        font-size: 0.92rem;
        color: var(--text-main);
        margin-bottom: 10px;
        font-weight: 600;
    }
    .deep-dive-points li i {
        color: #10B981;
    }

    /* 分类页板块6：双列平铺问答卡片 */
    .faq-grid-card {
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: 24px;
    }
    .faq-flat-box {
        background: #FFFFFF;
        border: 1px solid var(--border-color);
        border-radius: var(--radius-md);
        padding: 26px;
        box-shadow: 0 2px 6px rgba(0,0,0,0.02);
    }
    .faq-flat-q {
        font-size: 1.05rem;
        font-weight: 800;
        color: var(--text-main);
        display: flex;
        align-items: flex-start;
        gap: 12px;
        margin-bottom: 12px;
    }
    .faq-flat-q i {
        color: var(--secondary-color);
        margin-top: 3px;
    }
    .faq-flat-a {
        font-size: 0.92rem;
        color: var(--text-muted);
        line-height: 1.7;
        margin: 0;
        padding-left: 28px;
    }

    /* 分类页板块7：专属转化通栏 */
    .cat-cta-banner {
        background: linear-gradient(135deg, #1E40AF 0%, #1E3A8A 100%);
        border-radius: var(--radius-lg);
        padding: 55px 45px;
        color: #FFFFFF;
        display: flex;
        align-items: center;
        justify-content: space-between;
        gap: 30px;
        box-shadow: 0 10px 25px -5px rgba(30, 64, 175, 0.4);
    }
    .cat-cta-text h3 {
        font-size: 1.85rem;
        font-weight: 900;
        color: #FFFFFF;
        margin-bottom: 10px;
    }
    .cat-cta-text p {
        font-size: 1rem;
        color: #E2E8F0;
        margin: 0;
        max-width: 680px;
        line-height: 1.6;
    }
    .btn-cta-gold {
        background: var(--accent-color);
        color: #FFFFFF !important;
        padding: 14px 34px;
        font-size: 1.02rem;
        font-weight: 800;
        border-radius: var(--radius-sm);
        display: inline-flex;
        align-items: center;
        gap: 8px;
        box-shadow: 0 4px 14px rgba(245, 158, 11, 0.4);
        flex-shrink: 0;
        transition: var(--transition);
    }
    .btn-cta-gold:hover {
        background: var(--accent-hover);
        transform: translateY(-2px);
        box-shadow: 0 8px 20px rgba(245, 158, 11, 0.5);
    }

    /* 底部固定转化条 */
    .sticky-bottom-bar {
        position: fixed;
        bottom: 0;
        left: 0;
        width: 100%;
        background: rgba(255, 255, 255, 0.96);
        backdrop-filter: blur(10px);
        -webkit-backdrop-filter: blur(10px);
        border-top: 1px solid var(--border-color);
        box-shadow: 0 -4px 16px rgba(30, 64, 175, 0.08);
        z-index: 999;
        padding: 12px 0;
    }
    .sticky-bar-inner {
        max-width: 1240px;
        margin: 0 auto;
        padding: 0 20px;
        display: flex;
        align-items: center;
        justify-content: space-between;
    }
    .sticky-bar-title {
        font-size: 0.95rem;
        font-weight: 700;
        color: var(--text-main);
        display: flex;
        align-items: center;
        gap: 10px;
    }
    .sticky-bar-title i {
        color: var(--secondary-color);
    }
    .sticky-bar-tag {
        font-size: 0.75rem;
        background: #EFF6FF;
        color: var(--primary-color);
        padding: 2px 8px;
        border-radius: 4px;
        font-weight: 600;
    }
    .sticky-bar-actions {
        display: flex;
        align-items: center;
        gap: 12px;
    }
    .sticky-btn {
        background: var(--primary-color);
        color: #FFFFFF !important;
        font-size: 0.85rem;
        font-weight: 700;
        padding: 8px 18px;
        border-radius: var(--radius-sm);
        display: inline-flex;
        align-items: center;
        gap: 6px;
    }
    .sticky-btn:hover {
        background: var(--primary-hover);
    }

    /* 页脚 */
    .site-footer {
        background: #0F172A;
        color: #F8FAFC;
        padding: 65px 0 35px;
        margin-top: 0;
        padding-bottom: 85px; /* 留出吸底条高度 */
    }
    .footer-grid {
        display: grid;
        grid-template-columns: 2fr 1fr 1fr 1.5fr;
        gap: 40px;
        margin-bottom: 45px;
    }
    .footer-brand h4 {
        font-size: 1.35rem;
        font-weight: 800;
        color: #FFFFFF;
        margin-bottom: 16px;
    }
    .footer-col h5 {
        font-size: 1rem;
        font-weight: 700;
        color: #FFFFFF;
        margin-bottom: 18px;
        position: relative;
        padding-bottom: 8px;
    }
    .footer-col h5::after {
        content: "";
        position: absolute;
        bottom: 0;
        left: 0;
        width: 24px;
        height: 2px;
        background: var(--secondary-color);
    }
    .footer-col ul {
        list-style: none;
        padding: 0;
        margin: 0;
    }
    .footer-col ul li {
        margin-bottom: 10px;
    }
    .footer-col ul li a {
        color: #94A3B8;
        font-size: 0.9rem;
        display: inline-flex;
        align-items: center;
        gap: 6px;
    }
    .footer-col ul li a:hover {
        color: #FFFFFF;
        transform: translateX(3px);
    }
    .footer-bottom {
        padding-top: 25px;
        border-top: 1px solid #1E293B;
        display: flex;
        align-items: center;
        justify-content: space-between;
        font-size: 0.88rem;
        color: #64748B;
    }

    /* 响应式断点控制 */
    @media (max-width: 1024px) {
        .leaderboard-container {
            grid-template-columns: repeat(3, 1fr);
        }
        .deep-dive-card {
            grid-template-columns: 1fr;
        }
        .deep-dive-image {
            min-height: 240px;
        }
    }
    @media (max-width: 768px) {
        .nav-menu {
            display: none;
        }
        .footer-grid {
            grid-template-columns: 1fr;
            gap: 30px;
        }
        .category-h1 {
            font-size: 1.85rem;
        }
        .faq-grid-card {
            grid-template-columns: 1fr;
        }
        .leaderboard-container {
            grid-template-columns: 1fr;
        }
        .cat-cta-banner {
            flex-direction: column;
            align-items: flex-start;
            padding: 35px 24px;
        }
        .btn-cta-gold {
            width: 100%;
            justify-content: center;
        }
        .sticky-bar-title {
            font-size: 0.82rem;
        }
        .sticky-bar-tag {
            display: none;
        }
        .footer-bottom {
            flex-direction: column;
            gap: 10px;
            text-align: center;
        }
    }