/* roulang page: index */
:root {
      --bg-dark: #0D0F14;
      --bg-card: #161922;
      --bg-card-hover: #1E2330;
      --purple-start: #8A2BE2;
      --purple-end: #7928CA;
      --cyan-accent: #00F2FE;
      --text-main: #F3F4F6;
      --text-muted: #9CA3AF;
      --border-color: rgba(255, 255, 255, 0.08);
      --border-highlight: rgba(138, 43, 226, 0.4);
      --radius-sm: 8px;
      --radius-md: 12px;
      --radius-lg: 16px;
      --glow-purple: 0 10px 30px -10px rgba(138, 43, 226, 0.35);
      --glow-cyan: 0 0 20px rgba(0, 242, 254, 0.25);
    }

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

    body {
      background-color: var(--bg-dark);
      color: var(--text-main);
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      line-height: 1.7;
      letter-spacing: -0.015em;
      overflow-x: hidden;
    }

    a {
      color: inherit;
      text-decoration: none;
      transition: all 0.25s ease;
    }

    a:hover, a:focus {
      color: var(--cyan-accent);
      outline: none;
    }

    /* 顶部导航 */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(13, 15, 20, 0.85);
      backdrop-filter: blur(14px);
      -webkit-backdrop-filter: blur(14px);
      border-bottom: 1px solid var(--border-color);
      padding: 14px 0;
    }

    .nav-container {
      display: flex;
      align-items: center;
      justify-content: space-between;
    }

    .brand-logo {
      font-size: 1.35rem;
      font-weight: 800;
      background: linear-gradient(135deg, #FFF 20%, var(--cyan-accent) 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      display: flex;
      align-items: center;
      gap: 10px;
      letter-spacing: -0.02em;
    }

    .brand-logo i {
      color: var(--cyan-accent);
      -webkit-text-fill-color: initial;
      font-size: 1.25rem;
    }

    .nav-links {
      display: flex;
      list-style: none;
      margin: 0;
      gap: 28px;
      align-items: center;
    }

    .nav-item a {
      font-size: 0.95rem;
      font-weight: 500;
      color: var(--text-muted);
      position: relative;
      padding: 6px 0;
    }

    .nav-item.active a,
    .nav-item a:hover {
      color: #FFF;
    }

    .nav-item.active a::after {
      content: "";
      position: absolute;
      bottom: 0;
      left: 0;
      width: 100%;
      height: 2px;
      background: linear-gradient(90deg, var(--purple-start), var(--cyan-accent));
      border-radius: 2px;
    }

    .header-cta-btn {
      background: linear-gradient(135deg, var(--purple-start), var(--purple-end));
      color: #FFF !important;
      padding: 9px 20px;
      font-size: 0.88rem;
      font-weight: 600;
      border-radius: 999px;
      border: 1px solid rgba(255, 255, 255, 0.15);
      box-shadow: var(--glow-purple);
      display: inline-flex;
      align-items: center;
      gap: 8px;
    }

    .header-cta-btn:hover {
      transform: translateY(-2px);
      box-shadow: 0 12px 30px -5px rgba(138, 43, 226, 0.5);
    }

    /* 模块通用样式 */
    .section-wrap {
      padding: 85px 0;
      position: relative;
    }

    .section-wrap.alt-bg {
      background: #11141C;
    }

    .section-head {
      margin-bottom: 50px;
      position: relative;
    }

    .section-tag {
      display: inline-block;
      font-size: 0.8rem;
      font-weight: 600;
      text-transform: uppercase;
      letter-spacing: 0.08em;
      color: var(--cyan-accent);
      background: rgba(0, 242, 254, 0.08);
      border: 1px solid rgba(0, 242, 254, 0.2);
      padding: 4px 14px;
      border-radius: 999px;
      margin-bottom: 14px;
    }

    .section-title {
      font-size: 2.1rem;
      font-weight: 700;
      color: #FFF;
      line-height: 1.35;
      margin-bottom: 14px;
    }

    .section-desc {
      font-size: 1rem;
      color: var(--text-muted);
      max-width: 820px;
      margin: 0 auto;
    }

    .card-box {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 30px 26px;
      transition: all 0.3s ease;
      height: 100%;
      position: relative;
      overflow: hidden;
    }

    .card-box:hover {
      background: var(--bg-card-hover);
      border-color: var(--border-highlight);
      transform: translateY(-4px);
      box-shadow: var(--glow-purple);
    }

    /* 按钮通用 */
    .btn-main {
      background: linear-gradient(135deg, var(--purple-start), var(--purple-end));
      color: #FFF;
      padding: 13px 30px;
      font-size: 1rem;
      font-weight: 600;
      border-radius: var(--radius-sm);
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 10px;
      border: none;
      cursor: pointer;
      box-shadow: var(--glow-purple);
    }

    .btn-main:hover {
      background: linear-gradient(135deg, #9933EA, #802BD6);
      transform: translateY(-2px);
      color: #FFF;
    }

    .btn-secondary {
      background: rgba(255, 255, 255, 0.04);
      color: var(--text-main);
      padding: 13px 26px;
      font-size: 1rem;
      font-weight: 600;
      border-radius: var(--radius-sm);
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 10px;
      border: 1px solid var(--border-color);
      cursor: pointer;
    }

    .btn-secondary:hover {
      background: rgba(255, 255, 255, 0.09);
      border-color: rgba(255, 255, 255, 0.2);
      color: #FFF;
    }

    /* 板块1：Hero */
    .hero-section {
      padding: 90px 0 100px;
      background: radial-gradient(circle at 75% 25%, rgba(138, 43, 226, 0.18) 0%, rgba(13, 15, 20, 0) 65%),
                  radial-gradient(circle at 20% 70%, rgba(0, 242, 254, 0.1) 0%, rgba(13, 15, 20, 0) 60%);
      border-bottom: 1px solid var(--border-color);
    }

    .hero-h1 {
      font-size: 2.85rem;
      font-weight: 800;
      line-height: 1.25;
      color: #FFF;
      margin-bottom: 22px;
      letter-spacing: -0.03em;
    }

    .hero-h1 span {
      background: linear-gradient(120deg, #FFF, var(--cyan-accent));
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }

    .hero-p {
      font-size: 1.08rem;
      color: #BAC2DE;
      margin-bottom: 34px;
      line-height: 1.8;
      max-width: 580px;
    }

    .hero-stats-row {
      display: flex;
      gap: 25px;
      margin-top: 35px;
      border-top: 1px solid var(--border-color);
      padding-top: 25px;
    }

    .hero-stat-item h4 {
      font-size: 1.35rem;
      font-weight: 700;
      color: var(--cyan-accent);
      margin-bottom: 4px;
    }

    .hero-stat-item p {
      font-size: 0.85rem;
      color: var(--text-muted);
      margin: 0;
    }

    .hero-console-card {
      background: rgba(22, 25, 34, 0.85);
      backdrop-filter: blur(16px);
      border: 1px solid rgba(138, 43, 226, 0.3);
      border-radius: var(--radius-lg);
      padding: 24px;
      box-shadow: 0 20px 40px rgba(0, 0, 0, 0.6), 0 0 35px rgba(138, 43, 226, 0.2);
    }

    .console-header {
      display: flex;
      align-items: center;
      justify-content: space-between;
      border-bottom: 1px solid var(--border-color);
      padding-bottom: 14px;
      margin-bottom: 18px;
    }

    .console-dots {
      display: flex;
      gap: 7px;
    }

    .console-dots span {
      width: 10px;
      height: 10px;
      border-radius: 50%;
      background: #374151;
    }

    .console-dots span:nth-child(1) { background: #EF4444; }
    .console-dots span:nth-child(2) { background: #F59E0B; }
    .console-dots span:nth-child(3) { background: #10B981; }

    .stream-status-tag {
      font-size: 0.75rem;
      font-weight: 600;
      color: #10B981;
      background: rgba(16, 185, 129, 0.1);
      padding: 3px 10px;
      border-radius: 4px;
      display: flex;
      align-items: center;
      gap: 6px;
    }

    .stream-status-tag::before {
      content: "";
      width: 6px;
      height: 6px;
      border-radius: 50%;
      background: #10B981;
      animation: pulseGreen 2s infinite;
    }

    @keyframes pulseGreen {
      0%, 100% { opacity: 1; transform: scale(1); }
      50% { opacity: 0.4; transform: scale(0.85); }
    }

    .console-screen {
      background: #0B0D12;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-sm);
      padding: 16px;
      font-family: "SFMono-Regular", Consolas, Menlo, Monaco, monospace;
      font-size: 0.84rem;
      line-height: 1.7;
      color: #A5B4FC;
      margin-bottom: 18px;
    }

    .console-metric-grid {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 12px;
    }

    .metric-small-card {
      background: rgba(255, 255, 255, 0.02);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-sm);
      padding: 12px;
    }

    .metric-small-card label {
      font-size: 0.75rem;
      color: var(--text-muted);
      display: block;
      margin-bottom: 4px;
    }

    .metric-small-card strong {
      font-size: 1.1rem;
      color: #FFF;
    }

    /* 板块2：服务矩阵 */
    .feature-icon-wrap {
      width: 52px;
      height: 52px;
      border-radius: 12px;
      background: linear-gradient(135deg, rgba(138, 43, 226, 0.2), rgba(0, 242, 254, 0.2));
      border: 1px solid rgba(138, 43, 226, 0.4);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.3rem;
      color: var(--cyan-accent);
      margin-bottom: 20px;
    }

    .feature-card h3 {
      font-size: 1.25rem;
      color: #FFF;
      font-weight: 700;
      margin-bottom: 12px;
    }

    .feature-card p {
      font-size: 0.92rem;
      color: var(--text-muted);
      margin: 0;
      line-height: 1.65;
    }

    /* 板块3：优势数据 */
    .kpi-row {
      background: linear-gradient(180deg, #161922 0%, #0F121A 100%);
      border-top: 1px solid var(--border-color);
      border-bottom: 1px solid var(--border-color);
      padding: 60px 0;
    }

    .kpi-card {
      text-align: center;
      padding: 10px 15px;
    }

    .kpi-number {
      font-size: 2.8rem;
      font-weight: 800;
      background: linear-gradient(135deg, #FFF 30%, var(--cyan-accent) 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      line-height: 1.1;
      margin-bottom: 10px;
    }

    .kpi-title {
      font-size: 1rem;
      font-weight: 600;
      color: #FFF;
      margin-bottom: 6px;
    }

    .kpi-desc {
      font-size: 0.86rem;
      color: var(--text-muted);
      margin: 0;
    }

    /* 板块4：流程方案 */
    .step-card {
      position: relative;
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 28px 22px;
      height: 100%;
    }

    .step-badge {
      font-size: 0.75rem;
      font-weight: 800;
      color: var(--cyan-accent);
      background: rgba(0, 242, 254, 0.1);
      padding: 4px 10px;
      border-radius: 6px;
      display: inline-block;
      margin-bottom: 16px;
    }

    .step-card h3 {
      font-size: 1.15rem;
      font-weight: 700;
      color: #FFF;
      margin-bottom: 10px;
    }

    .step-card p {
      font-size: 0.88rem;
      color: var(--text-muted);
      margin: 0;
      line-height: 1.6;
    }

    /* 板块5：多端场景图文交错 */
    .cross-platform-box {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 45px;
      position: relative;
    }

    .scene-point-list {
      list-style: none;
      margin: 25px 0 0;
    }

    .scene-point-list li {
      display: flex;
      align-items: flex-start;
      gap: 14px;
      margin-bottom: 18px;
    }

    .scene-point-list i {
      color: var(--cyan-accent);
      font-size: 1.1rem;
      margin-top: 4px;
    }

    .scene-point-list strong {
      display: block;
      color: #FFF;
      font-size: 0.98rem;
      margin-bottom: 2px;
    }

    .scene-point-list span {
      font-size: 0.88rem;
      color: var(--text-muted);
    }

    .preview-board {
      background: #0B0D12;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 24px;
      height: 100%;
      display: flex;
      flex-direction: column;
      justify-content: center;
    }

    .device-indicator {
      display: flex;
      justify-content: space-around;
      text-align: center;
      margin-bottom: 25px;
      border-bottom: 1px solid var(--border-color);
      padding-bottom: 20px;
    }

    .device-item i {
      font-size: 2rem;
      color: #A5B4FC;
      margin-bottom: 8px;
      display: block;
    }

    .device-item span {
      font-size: 0.85rem;
      color: var(--text-muted);
    }

    /* 板块6：案例墙 */
    .case-card {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 28px;
      height: 100%;
      transition: all 0.3s ease;
    }

    .case-card:hover {
      border-color: var(--border-highlight);
      transform: translateY(-3px);
    }

    .case-badge {
      font-size: 0.75rem;
      font-weight: 700;
      color: #10B981;
      background: rgba(16, 185, 129, 0.12);
      padding: 3px 10px;
      border-radius: 4px;
      display: inline-block;
      margin-bottom: 14px;
    }

    .case-card h3 {
      font-size: 1.2rem;
      color: #FFF;
      font-weight: 700;
      margin-bottom: 12px;
    }

    .case-card p {
      font-size: 0.9rem;
      color: var(--text-muted);
      line-height: 1.65;
      margin-bottom: 18px;
    }

    .case-meta {
      display: flex;
      justify-content: space-between;
      border-top: 1px solid var(--border-color);
      padding-top: 14px;
      font-size: 0.8rem;
      color: #818CF8;
    }

    /* 板块7：分类专区直通（全站极少出现分类链接的板块） */
    .category-access-box {
      background: linear-gradient(135deg, rgba(138, 43, 226, 0.15), rgba(0, 242, 254, 0.08));
      border: 1px solid rgba(138, 43, 226, 0.35);
      border-radius: var(--radius-lg);
      padding: 40px;
      margin-top: 20px;
    }

    .cat-portal-card {
      background: rgba(13, 15, 20, 0.7);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 26px;
      height: 100%;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .cat-portal-card:hover {
      border-color: var(--cyan-accent);
    }

    .cat-portal-card h3 {
      font-size: 1.3rem;
      color: #FFF;
      font-weight: 700;
      margin-bottom: 10px;
      display: flex;
      align-items: center;
      gap: 10px;
    }

    .cat-portal-card h3 i {
      color: var(--cyan-accent);
    }

    .cat-portal-card p {
      font-size: 0.92rem;
      color: var(--text-muted);
      margin-bottom: 22px;
      line-height: 1.65;
    }

    .cat-link-btn {
      color: var(--cyan-accent);
      font-size: 0.92rem;
      font-weight: 600;
      display: inline-flex;
      align-items: center;
      gap: 6px;
    }

    .cat-link-btn:hover {
      gap: 10px;
      color: #FFF;
    }

    /* 板块8：资讯矩阵 */
    .news-card {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 24px;
      height: 100%;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .news-date {
      font-size: 0.8rem;
      color: var(--text-muted);
      margin-bottom: 12px;
      display: block;
    }

    .news-card h3 {
      font-size: 1.15rem;
      color: #FFF;
      font-weight: 700;
      margin-bottom: 12px;
      line-height: 1.45;
    }

    .news-card p {
      font-size: 0.88rem;
      color: var(--text-muted);
      margin-bottom: 20px;
      line-height: 1.65;
    }

    .news-link {
      font-size: 0.85rem;
      color: #A78BFA;
      font-weight: 600;
      display: inline-flex;
      align-items: center;
      gap: 6px;
    }

    .news-link:hover {
      color: var(--cyan-accent);
    }

    /* 板块9：合作伙伴网格 */
    .partner-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
    }

    .partner-item {
      background: rgba(22, 25, 34, 0.6);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-sm);
      padding: 22px 16px;
      text-align: center;
      transition: all 0.25s ease;
    }

    .partner-item:hover {
      background: var(--bg-card);
      border-color: rgba(255, 255, 255, 0.2);
    }

    .partner-item i {
      font-size: 1.6rem;
      color: #9CA3AF;
      margin-bottom: 10px;
      display: block;
    }

    .partner-item span {
      font-size: 0.86rem;
      font-weight: 600;
      color: #D1D5DB;
      display: block;
    }

    /* 板块10：FAQ 手风琴 */
    .faq-container {
      max-width: 860px;
      margin: 0 auto;
    }

    .faq-item {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      margin-bottom: 16px;
      overflow: hidden;
    }

    .faq-item summary {
      padding: 20px 24px;
      font-size: 1.05rem;
      font-weight: 600;
      color: #FFF;
      cursor: pointer;
      list-style: none;
      display: flex;
      justify-content: space-between;
      align-items: center;
      user-select: none;
    }

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

    .faq-item summary::after {
      content: "\f078";
      font-family: "Font Awesome 6 Free";
      font-weight: 900;
      font-size: 0.85rem;
      color: var(--cyan-accent);
      transition: transform 0.3s ease;
    }

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

    .faq-content {
      padding: 0 24px 22px 24px;
      font-size: 0.92rem;
      color: var(--text-muted);
      line-height: 1.7;
      border-top: 1px solid rgba(255, 255, 255, 0.04);
      margin-top: 4px;
      padding-top: 16px;
    }

    /* 板块11：保障条 */
    .guarantee-box {
      background: #11141D;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 30px;
    }

    .guarantee-card {
      display: flex;
      align-items: flex-start;
      gap: 16px;
    }

    .guarantee-card i {
      font-size: 1.8rem;
      color: #10B981;
      margin-top: 2px;
    }

    .guarantee-card h4 {
      font-size: 1.05rem;
      font-weight: 700;
      color: #FFF;
      margin-bottom: 6px;
    }

    .guarantee-card p {
      font-size: 0.85rem;
      color: var(--text-muted);
      margin: 0;
      line-height: 1.55;
    }

    /* 板块12：收尾行动与反馈表单 */
    .action-cta-wrap {
      background: radial-gradient(circle at 50% 50%, rgba(138, 43, 226, 0.22) 0%, rgba(13, 15, 20, 0.95) 75%), #11141E;
      border: 1px solid rgba(138, 43, 226, 0.4);
      border-radius: var(--radius-lg);
      padding: 60px 45px;
      text-align: center;
      box-shadow: var(--glow-purple);
    }

    .cta-h2 {
      font-size: 2.2rem;
      font-weight: 800;
      color: #FFF;
      margin-bottom: 16px;
    }

    .cta-p {
      font-size: 1rem;
      color: #C7D2FE;
      max-width: 660px;
      margin: 0 auto 36px;
      line-height: 1.7;
    }

    .interactive-feedback-form {
      max-width: 580px;
      margin: 0 auto;
      display: flex;
      gap: 12px;
    }

    .form-input-text {
      flex: 1;
      background: rgba(13, 15, 20, 0.8);
      border: 1px solid rgba(255, 255, 255, 0.2);
      border-radius: var(--radius-sm);
      padding: 12px 18px;
      font-size: 0.95rem;
      color: #FFF;
      outline: none;
    }

    .form-input-text:focus {
      border-color: var(--cyan-accent);
      box-shadow: 0 0 10px rgba(0, 242, 254, 0.3);
    }

    /* 页脚 */
    .site-footer {
      background: #090A0E;
      border-top: 1px solid var(--border-color);
      padding: 70px 0 35px;
    }

    .footer-brand h3 {
      font-size: 1.3rem;
      font-weight: 700;
      color: #FFF;
      margin-bottom: 14px;
    }

    .footer-brand p {
      font-size: 0.88rem;
      color: var(--text-muted);
      line-height: 1.7;
      max-width: 360px;
    }

    .footer-title {
      font-size: 0.95rem;
      font-weight: 700;
      color: #FFF;
      margin-bottom: 18px;
      letter-spacing: 0.02em;
    }

    .footer-list {
      list-style: none;
      margin: 0;
    }

    .footer-list li {
      margin-bottom: 10px;
    }

    .footer-list a {
      font-size: 0.86rem;
      color: var(--text-muted);
    }

    .footer-list a:hover {
      color: var(--cyan-accent);
    }

    .footer-bottom {
      margin-top: 50px;
      padding-top: 25px;
      border-top: 1px solid var(--border-color);
      display: flex;
      justify-content: space-between;
      align-items: center;
      font-size: 0.82rem;
      color: #6B7280;
    }

    /* 响应式断点控制 */
    @media (max-width: 1024px) {
      .hero-h1 {
        font-size: 2.3rem;
      }
      .partner-grid {
        grid-template-columns: repeat(3, 1fr);
      }
    }

    @media (max-width: 768px) {
      .section-wrap {
        padding: 55px 0;
      }
      .hero-section {
        padding: 50px 0 65px;
      }
      .hero-h1 {
        font-size: 1.95rem;
      }
      .section-title {
        font-size: 1.65rem;
      }
      .nav-links {
        display: none;
      }
      .partner-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .cross-platform-box {
        padding: 24px;
      }
      .interactive-feedback-form {
        flex-direction: column;
      }
      .footer-bottom {
        flex-direction: column;
        gap: 12px;
        text-align: center;
      }
      .category-access-box {
        padding: 24px 18px;
      }
    }

/* roulang page: category1 */
:root {
      --bg-dark: #0D0F14;
      --bg-card: #161922;
      --bg-card-hover: #1E2330;
      --purple-start: #8A2BE2;
      --purple-end: #7928CA;
      --cyan-accent: #00F2FE;
      --text-main: #F3F4F6;
      --text-muted: #9CA3AF;
      --border-color: rgba(255, 255, 255, 0.08);
      --border-highlight: rgba(138, 43, 226, 0.4);
      --radius-sm: 8px;
      --radius-md: 12px;
      --radius-lg: 16px;
      --glow-purple: 0 10px 30px -10px rgba(138, 43, 226, 0.35);
      --glow-cyan: 0 0 20px rgba(0, 242, 254, 0.25);
    }
    body {
      background-color: var(--bg-dark);
      color: var(--text-main);
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      line-height: 1.7;
      letter-spacing: -0.015em;
      overflow-x: hidden;
      margin: 0;
    }
    a {
      color: inherit;
      text-decoration: none;
      transition: all 0.25s ease;
    }
    a:hover, a:focus {
      color: var(--cyan-accent);
      outline: none;
    }

    /* 顶部导航 */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(13, 15, 20, 0.85);
      backdrop-filter: blur(14px);
      -webkit-backdrop-filter: blur(14px);
      border-bottom: 1px solid var(--border-color);
      padding: 14px 0;
    }
    .nav-container {
      display: flex;
      align-items: center;
      justify-content: space-between;
    }
    .brand-logo {
      font-size: 1.35rem;
      font-weight: 800;
      background: linear-gradient(135deg, #FFF 20%, var(--cyan-accent) 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      display: flex;
      align-items: center;
      gap: 10px;
      letter-spacing: -0.02em;
    }
    .brand-logo i {
      color: var(--cyan-accent);
      -webkit-text-fill-color: initial;
      font-size: 1.25rem;
    }
    .nav-links {
      display: flex;
      list-style: none;
      margin: 0;
      gap: 28px;
      align-items: center;
    }
    .nav-item a {
      font-size: 0.95rem;
      font-weight: 500;
      color: var(--text-muted);
      position: relative;
      padding: 6px 0;
    }
    .nav-item.active a,
    .nav-item a:hover {
      color: #FFF;
    }
    .nav-item.active a::after {
      content: "";
      position: absolute;
      bottom: 0;
      left: 0;
      width: 100%;
      height: 2px;
      background: linear-gradient(90deg, var(--purple-start), var(--cyan-accent));
      border-radius: 2px;
    }
    .header-cta-btn {
      background: linear-gradient(135deg, var(--purple-start), var(--purple-end));
      color: #FFF !important;
      padding: 9px 20px;
      font-size: 0.88rem;
      font-weight: 600;
      border-radius: 999px;
      border: 1px solid rgba(255, 255, 255, 0.15);
      box-shadow: var(--glow-purple);
      display: inline-flex;
      align-items: center;
      gap: 8px;
    }
    .header-cta-btn:hover {
      transform: translateY(-2px);
      box-shadow: 0 12px 30px -5px rgba(138, 43, 226, 0.5);
    }

    /* 面包屑导航栏 */
    .breadcrumb-nav-wrapper {
      background: #11141D;
      border-bottom: 1px solid var(--border-color);
      padding: 12px 0;
      font-size: 0.88rem;
    }
    .breadcrumb-flex {
      display: flex;
      justify-content: space-between;
      align-items: center;
    }
    .breadcrumb-trail {
      display: flex;
      align-items: center;
      gap: 8px;
      color: var(--text-muted);
    }
    .breadcrumb-trail a {
      color: var(--text-muted);
      display: inline-flex;
      align-items: center;
      gap: 6px;
    }
    .breadcrumb-trail a:hover {
      color: #FFF;
    }
    .breadcrumb-trail .separator {
      opacity: 0.4;
    }
    .breadcrumb-trail .current-node {
      color: var(--cyan-accent);
      font-weight: 600;
    }
    .btn-return-back {
      font-size: 0.85rem;
      color: var(--text-muted);
      background: rgba(255, 255, 255, 0.04);
      padding: 5px 14px;
      border-radius: var(--radius-sm);
      border: 1px solid var(--border-color);
      display: inline-flex;
      align-items: center;
      gap: 6px;
    }
    .btn-return-back:hover {
      background: rgba(255, 255, 255, 0.08);
      color: #FFF;
      border-color: rgba(255, 255, 255, 0.2);
    }

    /* 模块通用样式 */
    .cat-section {
      padding: 60px 0;
      position: relative;
    }
    .cat-section.alt-surface {
      background: #11141C;
    }
    .section-headline {
      margin-bottom: 35px;
    }
    .badge-chip {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      font-size: 0.78rem;
      font-weight: 600;
      text-transform: uppercase;
      letter-spacing: 0.06em;
      color: var(--cyan-accent);
      background: rgba(0, 242, 254, 0.08);
      border: 1px solid rgba(0, 242, 254, 0.2);
      padding: 4px 12px;
      border-radius: 999px;
      margin-bottom: 12px;
    }
    .block-title {
      font-size: 1.85rem;
      font-weight: 700;
      color: #FFF;
      line-height: 1.35;
      margin-bottom: 12px;
    }
    .block-desc {
      font-size: 0.96rem;
      color: var(--text-muted);
      line-height: 1.7;
    }

    /* 板块 1：紧凑 H1 标头 */
    .cat-header-hero {
      padding: 50px 0 40px;
      background: radial-gradient(circle at 80% 30%, rgba(138, 43, 226, 0.15) 0%, rgba(13, 15, 20, 0) 65%),
                  radial-gradient(circle at 10% 70%, rgba(0, 242, 254, 0.08) 0%, rgba(13, 15, 20, 0) 55%);
      border-bottom: 1px solid var(--border-color);
    }
    .cat-h1 {
      font-size: 2.3rem;
      font-weight: 800;
      line-height: 1.3;
      color: #FFF;
      margin-bottom: 16px;
      letter-spacing: -0.025em;
    }
    .cat-h1 span {
      background: linear-gradient(120deg, #FFF 30%, var(--cyan-accent) 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }
    .cat-summary-text {
      font-size: 1.02rem;
      color: #BAC2DE;
      max-width: 820px;
      line-height: 1.8;
      margin-bottom: 24px;
    }
    .cat-meta-indicators {
      display: flex;
      flex-wrap: wrap;
      gap: 15px;
      align-items: center;
    }
    .indicator-pill {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      background: rgba(22, 25, 34, 0.9);
      border: 1px solid var(--border-color);
      padding: 6px 16px;
      border-radius: var(--radius-sm);
      font-size: 0.85rem;
      color: var(--text-main);
    }
    .pulse-dot {
      width: 8px;
      height: 8px;
      border-radius: 50%;
      background: #10B981;
      box-shadow: 0 0 10px #10B981;
      animation: pulseGreen 2s infinite ease-in-out;
    }
    @keyframes pulseGreen {
      0%, 100% { opacity: 1; transform: scale(1); }
      50% { opacity: 0.4; transform: scale(0.85); }
    }

    /* 板块 2：多维筛选面板 */
    .filter-panel-box {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 22px 26px;
      box-shadow: 0 8px 24px rgba(0, 0, 0, 0.3);
    }
    .filter-row {
      display: flex;
      align-items: center;
      gap: 16px;
      padding: 10px 0;
      border-bottom: 1px solid rgba(255, 255, 255, 0.04);
    }
    .filter-row:last-child {
      border-bottom: none;
      padding-bottom: 0;
    }
    .filter-row:first-child {
      padding-top: 0;
    }
    .filter-label {
      font-size: 0.88rem;
      font-weight: 600;
      color: var(--cyan-accent);
      min-width: 80px;
      display: flex;
      align-items: center;
      gap: 6px;
    }
    .filter-options {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      align-items: center;
    }
    .filter-tag {
      font-size: 0.84rem;
      padding: 5px 14px;
      border-radius: 6px;
      background: rgba(255, 255, 255, 0.03);
      color: var(--text-muted);
      border: 1px solid var(--border-color);
      cursor: pointer;
      transition: all 0.2s ease;
      user-select: none;
    }
    .filter-tag:hover {
      background: rgba(255, 255, 255, 0.08);
      color: #FFF;
      border-color: rgba(255, 255, 255, 0.2);
    }
    .filter-tag.active {
      background: linear-gradient(135deg, var(--purple-start), var(--purple-end));
      color: #FFF;
      font-weight: 600;
      border-color: rgba(255, 255, 255, 0.25);
      box-shadow: var(--glow-purple);
    }

    /* 板块 3：分类卡片网格 */
    .media-node-card {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      overflow: hidden;
      transition: all 0.3s cubic-bezier(0.2, 0, 0, 1);
      display: flex;
      flex-direction: column;
      height: 100%;
      position: relative;
    }
    .media-node-card:hover {
      background: var(--bg-card-hover);
      border-color: var(--border-highlight);
      transform: translateY(-5px);
      box-shadow: var(--glow-purple);
    }
    .card-top-banner {
      background: #1F2432;
      padding: 16px 20px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      border-bottom: 1px solid rgba(255, 255, 255, 0.05);
      position: relative;
    }
    .node-code {
      font-size: 0.85rem;
      font-family: monospace;
      color: var(--cyan-accent);
      font-weight: 700;
      letter-spacing: 0.05em;
    }
    .bitrate-tag {
      font-size: 0.72rem;
      font-weight: 700;
      padding: 3px 8px;
      border-radius: 4px;
      background: rgba(16, 185, 129, 0.15);
      color: #10B981;
      border: 1px solid rgba(16, 185, 129, 0.3);
    }
    .card-content-body {
      padding: 22px 20px;
      flex: 1;
      display: flex;
      flex-direction: column;
    }
    .node-title {
      font-size: 1.15rem;
      font-weight: 700;
      color: #FFF;
      margin-bottom: 10px;
      line-height: 1.4;
    }
    .node-desc {
      font-size: 0.88rem;
      color: var(--text-muted);
      line-height: 1.65;
      margin-bottom: 18px;
      flex: 1;
    }
    .node-spec-list {
      list-style: none;
      margin: 0 0 20px 0;
      padding: 0;
      border-top: 1px solid rgba(255, 255, 255, 0.04);
      padding-top: 14px;
      display: flex;
      flex-direction: column;
      gap: 7px;
    }
    .node-spec-item {
      font-size: 0.82rem;
      color: #A3ADC2;
      display: flex;
      justify-content: space-between;
    }
    .node-spec-item span:first-child {
      color: var(--text-muted);
    }
    .node-action-footer {
      display: flex;
      gap: 10px;
      align-items: center;
    }
    .btn-card-stream {
      flex: 1;
      background: linear-gradient(135deg, rgba(138, 43, 226, 0.2), rgba(121, 40, 202, 0.3));
      border: 1px solid rgba(138, 43, 226, 0.5);
      color: #FFF;
      font-size: 0.86rem;
      font-weight: 600;
      padding: 8px 14px;
      border-radius: var(--radius-sm);
      text-align: center;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 6px;
    }
    .btn-card-stream:hover {
      background: linear-gradient(135deg, var(--purple-start), var(--purple-end));
      color: #FFF;
      box-shadow: var(--glow-purple);
    }
    .btn-card-ping {
      background: rgba(255, 255, 255, 0.03);
      border: 1px solid var(--border-color);
      color: var(--text-muted);
      padding: 8px 12px;
      font-size: 0.82rem;
      border-radius: var(--radius-sm);
    }
    .btn-card-ping:hover {
      color: var(--cyan-accent);
      border-color: var(--cyan-accent);
    }
    .pagination-wrapper {
      text-align: center;
      margin-top: 45px;
    }
    .btn-load-more {
      background: rgba(255, 255, 255, 0.04);
      border: 1px solid var(--border-color);
      color: var(--text-main);
      padding: 12px 36px;
      font-size: 0.94rem;
      font-weight: 600;
      border-radius: var(--radius-sm);
      display: inline-flex;
      align-items: center;
      gap: 10px;
      transition: all 0.25s ease;
    }
    .btn-load-more:hover {
      background: rgba(255, 255, 255, 0.08);
      border-color: rgba(255, 255, 255, 0.25);
      color: #FFF;
      transform: translateY(-2px);
    }

    /* 板块 4：精选专题横幅 */
    .featured-topic-banner {
      background: linear-gradient(135deg, rgba(22, 25, 34, 0.95), rgba(17, 20, 28, 0.98)),
                  radial-gradient(circle at 95% 50%, rgba(0, 242, 254, 0.12), transparent 50%);
      border: 1px solid var(--border-highlight);
      border-radius: var(--radius-lg);
      padding: 40px;
      position: relative;
      overflow: hidden;
    }
    .featured-topic-banner::before {
      content: "";
      position: absolute;
      top: 0;
      left: 0;
      width: 4px;
      height: 100%;
      background: linear-gradient(180deg, var(--cyan-accent), var(--purple-start));
    }
    .topic-badge {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      background: rgba(138, 43, 226, 0.2);
      border: 1px solid rgba(138, 43, 226, 0.4);
      color: #D8B4FE;
      font-size: 0.78rem;
      font-weight: 700;
      padding: 4px 12px;
      border-radius: 999px;
      margin-bottom: 16px;
    }
    .topic-h3 {
      font-size: 1.7rem;
      font-weight: 800;
      color: #FFF;
      line-height: 1.35;
      margin-bottom: 14px;
    }
    .topic-p {
      color: #BAC2DE;
      font-size: 0.96rem;
      line-height: 1.75;
      max-width: 680px;
      margin-bottom: 24px;
    }
    .topic-metrics-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 16px;
      margin-bottom: 24px;
    }
    .metric-small-card {
      background: rgba(0, 0, 0, 0.25);
      border: 1px solid rgba(255, 255, 255, 0.05);
      padding: 12px 16px;
      border-radius: var(--radius-sm);
    }
    .metric-small-val {
      font-size: 1.25rem;
      font-weight: 800;
      color: var(--cyan-accent);
      font-family: monospace;
    }
    .metric-small-label {
      font-size: 0.75rem;
      color: var(--text-muted);
      margin-top: 2px;
    }

    /* 板块 5：技术要点双栏对比 */
    .tech-spec-box {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 32px 28px;
      height: 100%;
      position: relative;
    }
    .tech-spec-box.accent-purple {
      border-top: 3px solid var(--purple-start);
    }
    .tech-spec-box.accent-cyan {
      border-top: 3px solid var(--cyan-accent);
    }
    .tech-box-h4 {
      font-size: 1.28rem;
      font-weight: 700;
      color: #FFF;
      margin-bottom: 12px;
      display: flex;
      align-items: center;
      gap: 10px;
    }
    .tech-box-desc {
      font-size: 0.9rem;
      color: var(--text-muted);
      line-height: 1.7;
      margin-bottom: 20px;
    }
    .tech-checklist {
      list-style: none;
      margin: 0;
      padding: 0;
      display: flex;
      flex-direction: column;
      gap: 12px;
    }
    .tech-checklist li {
      font-size: 0.88rem;
      color: #D1D5DB;
      display: flex;
      align-items: flex-start;
      gap: 10px;
      line-height: 1.5;
    }
    .tech-checklist li i {
      margin-top: 3px;
      flex-shrink: 0;
    }
    .accent-purple .tech-checklist li i {
      color: #C084FC;
    }
    .accent-cyan .tech-checklist li i {
      color: var(--cyan-accent);
    }

    /* 板块 6：微答疑卡片 */
    .faq-mini-card {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 24px;
      height: 100%;
      transition: all 0.25s ease;
    }
    .faq-mini-card:hover {
      border-color: var(--border-highlight);
      transform: translateY(-3px);
    }
    .faq-mini-q {
      font-size: 1.05rem;
      font-weight: 700;
      color: #FFF;
      margin-bottom: 12px;
      display: flex;
      align-items: center;
      gap: 10px;
    }
    .faq-mini-q i {
      color: var(--cyan-accent);
      font-size: 0.95rem;
    }
    .faq-mini-a {
      font-size: 0.88rem;
      color: #9CA3AF;
      line-height: 1.75;
      margin: 0;
    }

    /* 板块 7：底层状态指引条 */
    .bottom-status-strip {
      background: #11141C;
      border-top: 1px solid var(--border-color);
      border-bottom: 1px solid var(--border-color);
      padding: 30px 0;
    }
    .status-strip-grid {
      display: flex;
      flex-wrap: wrap;
      align-items: center;
      justify-content: space-between;
      gap: 20px;
    }
    .status-item {
      display: flex;
      align-items: center;
      gap: 12px;
    }
    .status-icon-circle {
      width: 42px;
      height: 42px;
      border-radius: 50%;
      background: rgba(255, 255, 255, 0.03);
      border: 1px solid var(--border-color);
      display: flex;
      align-items: center;
      justify-content: center;
      color: var(--cyan-accent);
      font-size: 1.1rem;
    }
    .status-texts h5 {
      font-size: 0.92rem;
      font-weight: 700;
      color: #FFF;
      margin: 0 0 2px 0;
    }
    .status-texts p {
      font-size: 0.78rem;
      color: var(--text-muted);
      margin: 0;
    }

    /* 页脚 */
    .site-footer {
      background: #090B0E;
      border-top: 1px solid rgba(255, 255, 255, 0.06);
      padding: 70px 0 30px;
      color: var(--text-muted);
    }
    .footer-brand h3 {
      font-size: 1.25rem;
      font-weight: 800;
      color: #FFF;
      margin-bottom: 14px;
      display: flex;
      align-items: center;
    }
    .footer-brand p {
      font-size: 0.88rem;
      line-height: 1.75;
      color: #8C94A6;
      max-width: 380px;
    }
    .footer-title {
      font-size: 0.92rem;
      font-weight: 700;
      color: #FFF;
      margin-bottom: 16px;
      text-transform: uppercase;
      letter-spacing: 0.05em;
    }
    .footer-list {
      list-style: none;
      margin: 0;
      padding: 0;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }
    .footer-list li a {
      font-size: 0.86rem;
      color: #8C94A6;
    }
    .footer-list li a:hover {
      color: var(--cyan-accent);
      padding-left: 4px;
    }
    .footer-bottom {
      border-top: 1px solid rgba(255, 255, 255, 0.05);
      padding-top: 25px;
      margin-top: 40px;
      font-size: 0.82rem;
      color: #64748B;
      display: flex;
      justify-content: space-between;
      flex-wrap: wrap;
      gap: 12px;
    }

    @media print, screen and (max-width: 64em) {
      .topic-metrics-grid {
        grid-template-columns: repeat(2, 1fr);
      }
    }
    @media print, screen and (max-width: 40em) {
      .cat-h1 {
        font-size: 1.75rem;
      }
      .nav-links {
        display: none;
      }
      .topic-metrics-grid {
        grid-template-columns: 1fr;
      }
      .status-strip-grid {
        flex-direction: column;
        align-items: flex-start;
      }
      .featured-topic-banner {
        padding: 24px;
      }
    }