/* roulang page: index */
:root {
      --bg-dark-start: #070b14;
      --bg-dark-end: #0d1527;
      --card-bg: rgba(13, 25, 48, 0.72);
      --card-border: rgba(0, 229, 255, 0.2);
      --card-hover-border: rgba(0, 229, 255, 0.55);
      --accent-cyan: #00e5ff;
      --accent-blue: #2979ff;
      --accent-purple: #7c4dff;
      --text-main: #f0f5ff;
      --text-muted: rgba(240, 245, 255, 0.65);
      --text-dim: rgba(240, 245, 255, 0.4);
      --glow-shadow: 0 0 24px rgba(0, 229, 255, 0.35);
      --radius-sm: 6px;
      --radius-md: 12px;
      --radius-lg: 20px;
      --font-mono: "Roboto Mono", "DIN Alternate", monospace;
    }

    * {
      box-sizing: border-box;
    }

    body {
      margin: 0;
      padding: 0;
      background: radial-gradient(circle at 50% 0%, #111e3b 0%, var(--bg-dark-start) 45%, var(--bg-dark-end) 100%);
      background-attachment: fixed;
      color: var(--text-main);
      font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      line-height: 1.6;
      -webkit-font-smoothing: antialiased;
      overflow-x: hidden;
    }

    a {
      color: var(--accent-cyan);
      text-decoration: none;
      transition: all 0.25s ease;
    }
    a:hover, a:focus {
      color: #80f2ff;
      text-decoration: none;
    }

    /* 顶部导航 */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(7, 11, 20, 0.85);
      backdrop-filter: blur(18px);
      border-bottom: 1px solid rgba(0, 229, 255, 0.15);
      padding: 14px 0;
    }

    .brand-logo {
      display: inline-flex;
      align-items: center;
      gap: 10px;
      font-size: 20px;
      font-weight: 800;
      color: #ffffff;
      letter-spacing: 0.5px;
    }
    .brand-logo:hover {
      color: var(--accent-cyan);
    }
    .sound-wave-icon {
      display: inline-flex;
      align-items: flex-end;
      gap: 3px;
      height: 18px;
    }
    .sound-wave-icon span {
      width: 3px;
      background: var(--accent-cyan);
      border-radius: 2px;
      animation: pulseWave 1.4s ease-in-out infinite alternate;
    }
    .sound-wave-icon span:nth-child(1) { height: 8px; animation-delay: 0.1s; }
    .sound-wave-icon span:nth-child(2) { height: 16px; animation-delay: 0.3s; }
    .sound-wave-icon span:nth-child(3) { height: 11px; animation-delay: 0.5s; }
    .sound-wave-icon span:nth-child(4) { height: 18px; animation-delay: 0.2s; }

    @keyframes pulseWave {
      0% { transform: scaleY(0.4); opacity: 0.6; }
      100% { transform: scaleY(1); opacity: 1; box-shadow: 0 0 8px var(--accent-cyan); }
    }

    .main-nav {
      display: flex;
      align-items: center;
      gap: 24px;
      margin: 0;
      list-style: none;
    }
    .main-nav a {
      color: var(--text-muted);
      font-size: 15px;
      font-weight: 500;
      padding: 6px 12px;
      border-radius: var(--radius-sm);
    }
    .main-nav a:hover, .main-nav a.active {
      color: #ffffff;
      background: rgba(0, 229, 255, 0.12);
    }

    .nav-cta-btn {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      background: linear-gradient(135deg, var(--accent-blue), var(--accent-cyan));
      color: #030b17 !important;
      font-weight: 700;
      padding: 8px 18px;
      border-radius: 30px;
      box-shadow: 0 0 16px rgba(0, 229, 255, 0.35);
      transition: all 0.3s ease;
      font-size: 14px;
    }
    .nav-cta-btn:hover {
      box-shadow: 0 0 24px rgba(0, 229, 255, 0.65);
      transform: translateY(-2px);
    }

    /* 移动端菜单控制 */
    .mobile-menu-toggle {
      display: none;
      background: transparent;
      border: 1px solid var(--card-border);
      color: var(--text-main);
      padding: 6px 12px;
      border-radius: var(--radius-sm);
      cursor: pointer;
    }

    /* 拟态卡片公用规范 */
    .glass-card {
      background: var(--card-bg);
      backdrop-filter: blur(16px);
      -webkit-backdrop-filter: blur(16px);
      border: 1px solid var(--card-border);
      border-radius: var(--radius-md);
      padding: 24px;
      transition: all 0.3s ease;
      position: relative;
      overflow: hidden;
    }
    .glass-card:hover {
      border-color: var(--card-hover-border);
      box-shadow: var(--glow-shadow);
      transform: translateY(-3px);
    }

    /* 发光与渐变按钮 */
    .glow-btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      background: linear-gradient(135deg, var(--accent-blue), var(--accent-cyan));
      color: #050e1f;
      font-weight: 700;
      padding: 13px 28px;
      border-radius: 30px;
      box-shadow: 0 0 20px rgba(0, 229, 255, 0.4);
      transition: all 0.3s ease;
      font-size: 16px;
      border: none;
      cursor: pointer;
    }
    .glow-btn:hover {
      transform: translateY(-2px);
      box-shadow: 0 0 30px rgba(0, 229, 255, 0.7);
      color: #030812;
    }
    .ghost-btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      background: rgba(255, 255, 255, 0.05);
      color: var(--text-main);
      border: 1px solid rgba(0, 229, 255, 0.3);
      padding: 12px 26px;
      border-radius: 30px;
      font-weight: 600;
      transition: all 0.3s ease;
    }
    .ghost-btn:hover {
      background: rgba(0, 229, 255, 0.15);
      border-color: var(--accent-cyan);
      color: #ffffff;
    }

    /* 章节标题 */
    .section-head {
      margin-bottom: 40px;
      position: relative;
    }
    .section-tag {
      display: inline-block;
      font-size: 13px;
      font-family: var(--font-mono);
      color: var(--accent-cyan);
      background: rgba(0, 229, 255, 0.08);
      padding: 4px 12px;
      border-radius: 20px;
      border: 1px solid rgba(0, 229, 255, 0.2);
      margin-bottom: 12px;
      text-transform: uppercase;
      letter-spacing: 1px;
    }
    .section-head h2 {
      font-size: 28px;
      font-weight: 800;
      color: #ffffff;
      margin-bottom: 12px;
      letter-spacing: -0.5px;
    }
    .section-head p {
      color: var(--text-muted);
      font-size: 15px;
      max-width: 720px;
      margin: 0;
    }

    /* 板块通用内边距 */
    .content-section {
      padding: 70px 0;
      position: relative;
      border-bottom: 1px solid rgba(255, 255, 255, 0.04);
    }

    /* Hero */
    .hero-section {
      padding: 80px 0 60px;
      position: relative;
    }
    .hero-title {
      font-size: 42px;
      font-weight: 900;
      line-height: 1.25;
      margin-bottom: 20px;
      background: linear-gradient(135deg, #ffffff 40%, #80f2ff 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }
    .hero-desc {
      color: var(--text-muted);
      font-size: 17px;
      line-height: 1.7;
      margin-bottom: 30px;
    }
    .hero-features-list {
      display: flex;
      flex-wrap: wrap;
      gap: 16px;
      margin-bottom: 36px;
    }
    .hero-pill {
      background: rgba(13, 25, 48, 0.8);
      border: 1px solid rgba(0, 229, 255, 0.2);
      border-radius: 20px;
      padding: 6px 14px;
      font-size: 13px;
      color: #c9d8ff;
      display: flex;
      align-items: center;
      gap: 8px;
    }
    .hero-pill-dot {
      width: 7px;
      height: 7px;
      background: #00e676;
      border-radius: 50%;
      box-shadow: 0 0 6px #00e676;
    }

    /* 模拟波形控制台拟态窗口 */
    .console-mockup {
      background: rgba(10, 18, 36, 0.92);
      border: 1px solid var(--accent-cyan);
      box-shadow: 0 15px 40px rgba(0, 0, 0, 0.6), 0 0 30px rgba(0, 229, 255, 0.15);
      border-radius: var(--radius-lg);
      padding: 24px;
      position: relative;
    }
    .console-bar {
      display: flex;
      align-items: center;
      justify-content: space-between;
      border-bottom: 1px solid rgba(255, 255, 255, 0.08);
      padding-bottom: 14px;
      margin-bottom: 18px;
    }
    .console-dots {
      display: flex;
      gap: 6px;
    }
    .console-dots span {
      width: 10px;
      height: 10px;
      border-radius: 50%;
      background: rgba(255, 255, 255, 0.2);
    }
    .console-dots span:nth-child(1) { background: #ff5252; }
    .console-dots span:nth-child(2) { background: #ffd600; }
    .console-dots span:nth-child(3) { background: #00e676; }
    .waveform-display {
      height: 90px;
      background: rgba(0, 0, 0, 0.35);
      border-radius: var(--radius-sm);
      display: flex;
      align-items: center;
      justify-content: space-around;
      padding: 10px;
      margin-bottom: 20px;
      border: 1px dashed rgba(0, 229, 255, 0.25);
    }
    .wave-bar {
      width: 4px;
      background: linear-gradient(180deg, var(--accent-cyan), var(--accent-blue));
      border-radius: 2px;
      animation: barJump 1.8s ease infinite alternate;
    }
    @keyframes barJump {
      0% { height: 15%; opacity: 0.3; }
      100% { height: 88%; opacity: 1; box-shadow: 0 0 8px var(--accent-cyan); }
    }
    .console-meta-grid {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 12px;
      margin-bottom: 18px;
    }
    .console-meta-item {
      background: rgba(255, 255, 255, 0.03);
      padding: 10px;
      border-radius: var(--radius-sm);
      border-left: 3px solid var(--accent-cyan);
    }
    .console-meta-item .val {
      font-family: var(--font-mono);
      font-size: 16px;
      font-weight: 700;
      color: #ffffff;
    }
    .console-meta-item .lab {
      font-size: 12px;
      color: var(--text-dim);
    }

    /* 走马灯 ticker */
    .ticker-bar {
      background: rgba(13, 25, 48, 0.85);
      border-top: 1px solid rgba(0, 229, 255, 0.15);
      border-bottom: 1px solid rgba(0, 229, 255, 0.15);
      padding: 12px 0;
      overflow: hidden;
      white-space: nowrap;
    }
    .ticker-track {
      display: inline-flex;
      gap: 48px;
      animation: tickerScroll 24s linear infinite;
    }
    .ticker-item {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      font-size: 14px;
      color: var(--text-muted);
      font-family: var(--font-mono);
    }
    .ticker-item strong {
      color: var(--accent-cyan);
    }
    @keyframes tickerScroll {
      0% { transform: translateX(0); }
      100% { transform: translateX(-50%); }
    }

    /* 模拟音频轨道/卡片样式 */
    .track-row-card {
      background: var(--card-bg);
      border: 1px solid var(--card-border);
      border-radius: var(--radius-md);
      padding: 18px 24px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 20px;
      margin-bottom: 16px;
      transition: all 0.3s ease;
    }
    .track-row-card:hover {
      border-color: var(--accent-cyan);
      box-shadow: 0 0 20px rgba(0, 229, 255, 0.25);
      background: rgba(16, 32, 60, 0.85);
    }
    .track-badge {
      font-size: 12px;
      padding: 3px 8px;
      border-radius: 4px;
      background: rgba(0, 229, 255, 0.15);
      color: var(--accent-cyan);
      font-weight: 600;
    }
    .track-status-led {
      width: 9px;
      height: 9px;
      background: #00e676;
      border-radius: 50%;
      box-shadow: 0 0 8px #00e676;
      display: inline-block;
      margin-right: 6px;
    }

    /* 价格与套餐阶梯 */
    .pricing-card {
      background: var(--card-bg);
      border: 1px solid var(--card-border);
      border-radius: var(--radius-lg);
      padding: 36px 28px;
      text-align: center;
      transition: all 0.3s ease;
      height: 100%;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }
    .pricing-card.featured {
      border-color: var(--accent-cyan);
      background: linear-gradient(180deg, rgba(20, 36, 70, 0.85) 0%, rgba(10, 20, 40, 0.95) 100%);
      box-shadow: 0 0 35px rgba(0, 229, 255, 0.25);
      transform: scale(1.03);
    }
    .pricing-tag {
      display: inline-block;
      background: linear-gradient(135deg, var(--accent-blue), var(--accent-cyan));
      color: #050e1f;
      font-size: 12px;
      font-weight: 800;
      padding: 4px 12px;
      border-radius: 12px;
      margin-bottom: 16px;
    }
    .pricing-price {
      font-size: 38px;
      font-weight: 900;
      color: #ffffff;
      margin: 16px 0 24px;
      font-family: var(--font-mono);
    }
    .pricing-list {
      list-style: none;
      padding: 0;
      margin: 0 0 28px;
      text-align: left;
    }
    .pricing-list li {
      padding: 8px 0;
      color: var(--text-muted);
      font-size: 14px;
      border-bottom: 1px solid rgba(255, 255, 255, 0.05);
      display: flex;
      align-items: center;
      gap: 10px;
    }
    .pricing-list li::before {
      content: "✓";
      color: var(--accent-cyan);
      font-weight: bold;
    }

    /* 表格拟态容器 */
    .compare-table {
      width: 100%;
      border-collapse: separate;
      border-spacing: 0;
      background: var(--card-bg);
      border: 1px solid var(--card-border);
      border-radius: var(--radius-md);
      overflow: hidden;
    }
    .compare-table th, .compare-table td {
      padding: 16px 20px;
      border-bottom: 1px solid rgba(255, 255, 255, 0.06);
      text-align: left;
      font-size: 14px;
    }
    .compare-table th {
      background: rgba(0, 0, 0, 0.3);
      color: var(--accent-cyan);
      font-weight: 700;
    }
    .compare-table tr:hover td {
      background: rgba(255, 255, 255, 0.02);
    }

    /* FAQ 手风琴 */
    .faq-card {
      background: var(--card-bg);
      border: 1px solid var(--card-border);
      border-radius: var(--radius-md);
      margin-bottom: 14px;
      overflow: hidden;
    }
    .faq-q {
      padding: 18px 24px;
      font-weight: 700;
      color: #ffffff;
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      user-select: none;
    }
    .faq-q:hover {
      color: var(--accent-cyan);
    }
    .faq-a {
      padding: 0 24px 20px;
      color: var(--text-muted);
      font-size: 14px;
      line-height: 1.7;
    }

    /* 页脚 */
    .site-footer {
      background: #040810;
      border-top: 1px solid rgba(0, 229, 255, 0.15);
      padding: 60px 0 30px;
      color: var(--text-muted);
      font-size: 14px;
    }
    .footer-heading {
      color: #ffffff;
      font-weight: 700;
      font-size: 16px;
      margin-bottom: 18px;
    }
    .footer-links {
      list-style: none;
      padding: 0;
      margin: 0;
    }
    .footer-links li {
      margin-bottom: 10px;
    }
    .footer-links a {
      color: var(--text-muted);
    }
    .footer-links a:hover {
      color: var(--accent-cyan);
    }

    /* 响应式微调 */
    @media screen and (max-width: 1023px) {
      .hero-title { font-size: 32px; }
      .main-nav { display: none; }
      .mobile-menu-toggle { display: block; }
      .mobile-drawer {
        display: none;
        background: rgba(7, 11, 20, 0.98);
        border-bottom: 1px solid var(--card-border);
        padding: 20px;
      }
      .mobile-drawer.is-open { display: block; }
      .mobile-drawer ul { list-style: none; padding: 0; margin: 0; }
      .mobile-drawer li { margin-bottom: 12px; }
      .mobile-drawer a { color: var(--text-main); font-size: 16px; }
    }
    @media screen and (max-width: 639px) {
      .hero-title { font-size: 26px; }
      .content-section { padding: 50px 0; }
      .pricing-card.featured { transform: none; }
    }

/* roulang page: category2 */
:root {
      --bg-dark-start: #070b14;
      --bg-dark-end: #0d1527;
      --card-bg: rgba(13, 25, 48, 0.72);
      --card-border: rgba(0, 229, 255, 0.2);
      --card-hover-border: rgba(0, 229, 255, 0.55);
      --accent-cyan: #00e5ff;
      --accent-blue: #2979ff;
      --accent-purple: #7c4dff;
      --text-main: #f0f5ff;
      --text-muted: rgba(240, 245, 255, 0.65);
      --text-dim: rgba(240, 245, 255, 0.4);
      --glow-shadow: 0 0 24px rgba(0, 229, 255, 0.35);
      --radius-sm: 6px;
      --radius-md: 12px;
      --radius-lg: 20px;
      --font-mono: "Roboto Mono", "DIN Alternate", monospace;
    }

    body {
      margin: 0;
      padding: 0;
      background: radial-gradient(circle at 50% 0%, #111e3b 0%, var(--bg-dark-start) 45%, var(--bg-dark-end) 100%);
      background-attachment: fixed;
      color: var(--text-main);
      font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      line-height: 1.6;
      -webkit-font-smoothing: antialiased;
      overflow-x: hidden;
    }

    a {
      color: var(--accent-cyan);
      text-decoration: none;
      transition: all 0.25s ease;
    }
    a:hover, a:focus {
      color: #80f2ff;
      text-decoration: none;
    }

    /* 顶部导航 */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(7, 11, 20, 0.85);
      backdrop-filter: blur(18px);
      border-bottom: 1px solid rgba(0, 229, 255, 0.15);
      padding: 14px 0;
    }
    .brand-logo {
      display: inline-flex;
      align-items: center;
      gap: 10px;
      font-size: 20px;
      font-weight: 800;
      color: #ffffff;
      letter-spacing: 0.5px;
    }
    .brand-logo:hover {
      color: var(--accent-cyan);
    }
    .sound-wave-icon {
      display: inline-flex;
      align-items: center;
      gap: 3px;
      height: 18px;
    }
    .sound-wave-icon span {
      width: 3px;
      height: 100%;
      background: var(--accent-cyan);
      border-radius: 2px;
      animation: soundWave 1.2s infinite ease-in-out;
    }
    .sound-wave-icon span:nth-child(1) { animation-delay: 0.1s; height: 35%; }
    .sound-wave-icon span:nth-child(2) { animation-delay: 0.3s; height: 85%; }
    .sound-wave-icon span:nth-child(3) { animation-delay: 0.2s; height: 60%; }
    .sound-wave-icon span:nth-child(4) { animation-delay: 0.4s; height: 100%; }

    @keyframes soundWave {
      0%, 100% { transform: scaleY(0.4); }
      50% { transform: scaleY(1); }
    }

    .main-nav {
      display: flex;
      align-items: center;
      gap: 24px;
      margin: 0;
      list-style: none;
    }
    .main-nav a {
      color: var(--text-muted);
      font-size: 15px;
      font-weight: 500;
      padding: 6px 12px;
      border-radius: var(--radius-sm);
    }
    .main-nav a:hover, .main-nav a.active {
      color: #ffffff;
      background: rgba(0, 229, 255, 0.12);
    }
    .nav-cta-btn {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      background: linear-gradient(135deg, var(--accent-blue), var(--accent-cyan));
      color: #030b17 !important;
      font-weight: 700;
      padding: 8px 18px;
      border-radius: 30px;
      box-shadow: 0 0 16px rgba(0, 229, 255, 0.35);
      transition: all 0.3s ease;
      font-size: 14px;
    }
    .nav-cta-btn:hover {
      box-shadow: 0 0 24px rgba(0, 229, 255, 0.65);
      transform: translateY(-2px);
    }

    .mobile-menu-toggle {
      display: none;
      background: transparent;
      border: 1px solid var(--card-border);
      color: var(--text-main);
      padding: 6px 12px;
      border-radius: var(--radius-sm);
      cursor: pointer;
    }
    .mobile-drawer {
      display: none;
      background: rgba(7, 11, 20, 0.96);
      border-bottom: 1px solid var(--card-border);
      padding: 18px 0;
    }
    .mobile-drawer ul {
      list-style: none;
      margin: 0;
      padding: 0;
    }
    .mobile-drawer li {
      margin-bottom: 10px;
    }
    .mobile-drawer a {
      color: var(--text-main);
      font-size: 16px;
      display: block;
      padding: 8px 0;
    }

    /* 拟态卡片公用规范 */
    .glass-card {
      background: var(--card-bg);
      backdrop-filter: blur(16px);
      -webkit-backdrop-filter: blur(16px);
      border: 1px solid var(--card-border);
      border-radius: var(--radius-md);
      padding: 24px;
      transition: all 0.3s ease;
      position: relative;
      overflow: hidden;
    }
    .glass-card:hover {
      border-color: var(--card-hover-border);
      box-shadow: var(--glow-shadow);
      transform: translateY(-3px);
    }

    /* 发光与渐变按钮 */
    .glow-btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      background: linear-gradient(135deg, var(--accent-blue), var(--accent-cyan));
      color: #050e1f;
      font-weight: 700;
      padding: 12px 28px;
      border-radius: 30px;
      box-shadow: 0 0 20px rgba(0, 229, 255, 0.4);
      transition: all 0.3s ease;
      font-size: 15px;
      border: none;
      cursor: pointer;
    }
    .glow-btn:hover {
      transform: translateY(-2px);
      box-shadow: 0 0 30px rgba(0, 229, 255, 0.7);
      color: #030812;
    }
    .ghost-btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      background: rgba(255, 255, 255, 0.05);
      color: var(--text-main);
      border: 1px solid rgba(0, 229, 255, 0.3);
      padding: 12px 26px;
      border-radius: 30px;
      font-weight: 600;
      transition: all 0.3s ease;
      font-size: 15px;
    }
    .ghost-btn:hover {
      background: rgba(0, 229, 255, 0.15);
      border-color: var(--accent-cyan);
      color: #ffffff;
    }

    /* 章节标题 */
    .section-head {
      margin-bottom: 36px;
      position: relative;
    }
    .section-tag {
      display: inline-block;
      font-size: 13px;
      font-family: var(--font-mono);
      color: var(--accent-cyan);
      background: rgba(0, 229, 255, 0.08);
      padding: 4px 12px;
      border-radius: 20px;
      border: 1px solid rgba(0, 229, 255, 0.2);
      margin-bottom: 12px;
      text-transform: uppercase;
      letter-spacing: 1px;
    }
    .section-head h2 {
      font-size: 26px;
      font-weight: 800;
      color: #ffffff;
      margin-bottom: 10px;
    }
    .section-head p {
      color: var(--text-muted);
      font-size: 15px;
      max-width: 760px;
      margin: 0;
    }
    .content-section {
      padding: 60px 0;
      position: relative;
      border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    }

    /* 分类专属头部紧凑布局 */
    .cat-compact-header {
      padding: 50px 0 45px;
      background: linear-gradient(180deg, rgba(41, 121, 255, 0.08) 0%, rgba(7, 11, 20, 0) 100%);
      border-bottom: 1px solid rgba(0, 229, 255, 0.12);
    }
    .cat-header-title {
      font-size: 34px;
      font-weight: 900;
      line-height: 1.3;
      margin-bottom: 14px;
      background: linear-gradient(135deg, #ffffff 30%, #00e5ff 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }
    .cat-header-desc {
      font-size: 15px;
      color: var(--text-muted);
      line-height: 1.75;
      margin-bottom: 24px;
      max-width: 700px;
    }
    .topo-indicator-card {
      background: rgba(13, 25, 48, 0.85);
      border: 1px solid var(--card-border);
      border-radius: var(--radius-md);
      padding: 20px;
    }
    .topo-route-line {
      display: flex;
      align-items: center;
      justify-content: space-between;
      padding: 10px 0;
      border-bottom: 1px dashed rgba(255, 255, 255, 0.08);
    }
    .topo-route-line:last-child {
      border-bottom: none;
    }
    .topo-badge {
      font-family: var(--font-mono);
      font-size: 12px;
      background: rgba(0, 229, 255, 0.15);
      color: var(--accent-cyan);
      padding: 3px 8px;
      border-radius: 4px;
    }

    /* 测速矩阵 */
    .ping-meter-box {
      border-left: 3px solid var(--accent-cyan);
      padding: 14px 16px;
      background: rgba(0, 229, 255, 0.03);
      border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
      margin-bottom: 16px;
    }
    .ping-val {
      font-family: var(--font-mono);
      font-size: 22px;
      font-weight: 700;
      color: #00e676;
    }

    /* 音轨风格横向长卡片 */
    .track-media-card {
      background: var(--card-bg);
      border: 1px solid var(--card-border);
      border-radius: var(--radius-md);
      padding: 18px 24px;
      margin-bottom: 16px;
      transition: all 0.25s ease;
      display: flex;
      align-items: center;
      gap: 20px;
    }
    .track-media-card:hover {
      border-color: var(--accent-cyan);
      transform: translateX(4px);
      box-shadow: 0 4px 20px rgba(0, 229, 255, 0.18);
    }
    .track-play-badge {
      width: 44px;
      height: 44px;
      border-radius: 50%;
      background: rgba(0, 229, 255, 0.1);
      border: 1px solid var(--accent-cyan);
      display: flex;
      align-items: center;
      justify-content: center;
      color: var(--accent-cyan);
      flex-shrink: 0;
    }
    .track-meta-title {
      font-size: 16px;
      font-weight: 700;
      color: #ffffff;
      margin-bottom: 4px;
    }
    .track-wave-mock {
      height: 24px;
      display: flex;
      align-items: flex-end;
      gap: 2px;
      flex-grow: 1;
      max-width: 220px;
      opacity: 0.75;
    }
    .track-wave-bar {
      flex: 1;
      background: var(--accent-cyan);
      border-radius: 1px;
    }

    /* FAQ 手风琴样式 */
    .faq-accordion {
      list-style: none;
      margin: 0;
      padding: 0;
    }
    .faq-item {
      background: var(--card-bg);
      border: 1px solid var(--card-border);
      border-radius: var(--radius-md);
      margin-bottom: 12px;
      overflow: hidden;
    }
    .faq-title {
      padding: 18px 22px;
      font-size: 16px;
      font-weight: 600;
      color: #ffffff;
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      transition: background 0.2s;
    }
    .faq-title:hover {
      background: rgba(0, 229, 255, 0.05);
    }
    .faq-body {
      padding: 0 22px 18px;
      font-size: 14px;
      line-height: 1.7;
      color: var(--text-muted);
      border-top: 1px solid rgba(255, 255, 255, 0.04);
      padding-top: 14px;
    }

    /* 浮岛 CTA */
    .floating-cta-island {
      background: linear-gradient(135deg, rgba(13, 25, 48, 0.95), rgba(41, 121, 255, 0.2));
      border: 1px solid rgba(0, 229, 255, 0.4);
      border-radius: var(--radius-lg);
      padding: 40px;
      box-shadow: 0 10px 40px rgba(0, 0, 0, 0.5), inset 0 0 20px rgba(0, 229, 255, 0.1);
      text-align: center;
    }

    /* 页脚 */
    .site-footer {
      background: #040810;
      border-top: 1px solid rgba(0, 229, 255, 0.15);
      padding: 60px 0 30px;
      font-size: 14px;
    }
    .footer-heading {
      color: #ffffff;
      font-size: 15px;
      font-weight: 700;
      margin-bottom: 16px;
      letter-spacing: 0.5px;
    }
    .footer-links {
      list-style: none;
      margin: 0;
      padding: 0;
    }
    .footer-links li {
      margin-bottom: 8px;
    }
    .footer-links a {
      color: var(--text-muted);
      font-size: 13px;
    }
    .footer-links a:hover {
      color: var(--accent-cyan);
    }

    @media (max-width: 1023px) {
      .main-nav { display: none; }
      .mobile-menu-toggle { display: inline-block; }
      .cat-header-title { font-size: 28px; }
      .track-wave-mock { display: none; }
    }

/* roulang page: category1 */
:root {
    --bg-dark-start: #070b14;
    --bg-dark-end: #0d1527;
    --card-bg: rgba(13, 25, 48, 0.72);
    --card-border: rgba(0, 229, 255, 0.2);
    --card-hover-border: rgba(0, 229, 255, 0.55);
    --accent-cyan: #00e5ff;
    --accent-blue: #2979ff;
    --accent-purple: #7c4dff;
    --text-main: #f0f5ff;
    --text-muted: rgba(240, 245, 255, 0.65);
    --text-dim: rgba(240, 245, 255, 0.4);
    --glow-shadow: 0 0 24px rgba(0, 229, 255, 0.35);
    --radius-sm: 6px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --font-mono: "Roboto Mono", "DIN Alternate", monospace;
  }
  body {
    margin: 0;
    padding: 0;
    background: radial-gradient(circle at 50% 0%, #111e3b 0%, var(--bg-dark-start) 45%, var(--bg-dark-end) 100%);
    background-attachment: fixed;
    color: var(--text-main);
    font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
  }
  a {
    color: var(--accent-cyan);
    text-decoration: none;
    transition: all 0.25s ease;
  }
  a:hover, a:focus {
    color: #80f2ff;
    text-decoration: none;
  }
  /* 顶部导航 */
  .site-header {
    position: sticky;
    top: 0;
    z-index: 1000;
    background: rgba(7, 11, 20, 0.85);
    backdrop-filter: blur(18px);
    border-bottom: 1px solid rgba(0, 229, 255, 0.15);
    padding: 14px 0;
  }
  .brand-logo {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    font-size: 20px;
    font-weight: 800;
    color: #ffffff;
    letter-spacing: 0.5px;
  }
  .brand-logo:hover {
    color: var(--accent-cyan);
  }
  .sound-wave-icon {
    display: inline-flex;
    align-items: center;
    gap: 3px;
    height: 18px;
  }
  .sound-wave-icon span {
    display: block;
    width: 3px;
    background: var(--accent-cyan);
    border-radius: 2px;
    animation: wavePulse 1.2s infinite ease-in-out alternate;
  }
  .sound-wave-icon span:nth-child(1) { height: 8px; animation-delay: 0.1s; }
  .sound-wave-icon span:nth-child(2) { height: 16px; animation-delay: 0.3s; }
  .sound-wave-icon span:nth-child(3) { height: 12px; animation-delay: 0.2s; }
  .sound-wave-icon span:nth-child(4) { height: 6px; animation-delay: 0.4s; }
  @keyframes wavePulse {
    0% { transform: scaleY(0.4); opacity: 0.6; }
    100% { transform: scaleY(1.3); opacity: 1; }
  }
  .main-nav {
    display: flex;
    align-items: center;
    gap: 24px;
    margin: 0;
    list-style: none;
  }
  .main-nav a {
    color: var(--text-muted);
    font-size: 15px;
    font-weight: 500;
    padding: 6px 12px;
    border-radius: var(--radius-sm);
  }
  .main-nav a:hover, .main-nav a.active {
    color: #ffffff;
    background: rgba(0, 229, 255, 0.12);
  }
  .nav-cta-btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    background: linear-gradient(135deg, var(--accent-blue), var(--accent-cyan));
    color: #030b17 !important;
    font-weight: 700;
    padding: 8px 18px;
    border-radius: 30px;
    box-shadow: 0 0 16px rgba(0, 229, 255, 0.35);
    transition: all 0.3s ease;
    font-size: 14px;
  }
  .nav-cta-btn:hover {
    box-shadow: 0 0 24px rgba(0, 229, 255, 0.65);
    transform: translateY(-2px);
  }
  .mobile-menu-toggle {
    display: none;
    background: transparent;
    border: 1px solid var(--card-border);
    color: var(--text-main);
    padding: 6px 12px;
    border-radius: var(--radius-sm);
    cursor: pointer;
  }
  .mobile-drawer {
    display: none;
    background: rgba(7, 11, 20, 0.98);
    border-top: 1px solid var(--card-border);
    padding: 20px 0;
  }
  .mobile-drawer.is-active {
    display: block;
  }
  .mobile-drawer ul {
    list-style: none;
    margin: 0;
    padding: 0;
  }
  .mobile-drawer li {
    margin-bottom: 12px;
  }
  .mobile-drawer a {
    color: var(--text-muted);
    font-size: 16px;
    display: block;
    padding: 8px 12px;
  }
  .mobile-drawer a.active {
    color: #ffffff;
    background: rgba(0, 229, 255, 0.1);
  }

  /* 拟态与设计元素 */
  .glass-card {
    background: var(--card-bg);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid var(--card-border);
    border-radius: var(--radius-md);
    padding: 24px;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
  }
  .glass-card:hover {
    border-color: var(--card-hover-border);
    box-shadow: var(--glow-shadow);
    transform: translateY(-3px);
  }
  .glow-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--accent-blue), var(--accent-cyan));
    color: #050e1f !important;
    font-weight: 700;
    padding: 12px 28px;
    border-radius: 30px;
    box-shadow: 0 0 20px rgba(0, 229, 255, 0.4);
    transition: all 0.3s ease;
    font-size: 15px;
    border: none;
    cursor: pointer;
  }
  .glow-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 0 30px rgba(0, 229, 255, 0.7);
  }
  .ghost-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: rgba(255, 255, 255, 0.05);
    color: var(--text-main);
    border: 1px solid rgba(0, 229, 255, 0.3);
    padding: 10px 22px;
    border-radius: 30px;
    font-weight: 600;
    font-size: 14px;
    transition: all 0.3s ease;
  }
  .ghost-btn:hover {
    background: rgba(0, 229, 255, 0.15);
    border-color: var(--accent-cyan);
    color: #ffffff;
  }

  /* 板块通用间距 */
  .category-section {
    padding: 60px 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.04);
  }
  .section-tag {
    display: inline-block;
    font-size: 12px;
    font-family: var(--font-mono);
    color: var(--accent-cyan);
    background: rgba(0, 229, 255, 0.08);
    padding: 4px 12px;
    border-radius: 20px;
    border: 1px solid rgba(0, 229, 255, 0.2);
    margin-bottom: 12px;
    letter-spacing: 0.5px;
  }
  .section-heading {
    font-size: 26px;
    font-weight: 800;
    color: #ffffff;
    margin-bottom: 12px;
  }
  .section-desc {
    color: var(--text-muted);
    font-size: 15px;
    max-width: 780px;
    margin-bottom: 30px;
  }

  /* 分类头部专用紧凑横幅 */
  .category-compact-banner {
    padding: 50px 0 40px;
    background: linear-gradient(180deg, rgba(41, 121, 255, 0.08) 0%, rgba(7, 11, 20, 0) 100%);
    border-bottom: 1px solid rgba(0, 229, 255, 0.15);
  }
  .category-h1 {
    font-size: 34px;
    font-weight: 800;
    color: #ffffff;
    margin-bottom: 14px;
    letter-spacing: -0.5px;
  }
  .category-intro {
    color: var(--text-muted);
    font-size: 16px;
    line-height: 1.7;
    margin-bottom: 24px;
  }
  .metrics-badge-group {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
  }
  .metric-item {
    background: rgba(13, 25, 48, 0.85);
    border: 1px solid rgba(0, 229, 255, 0.25);
    border-radius: 8px;
    padding: 8px 16px;
    display: inline-flex;
    align-items: center;
    gap: 10px;
  }
  .metric-label {
    font-size: 12px;
    color: var(--text-dim);
  }
  .metric-val {
    font-family: var(--font-mono);
    font-size: 14px;
    font-weight: 700;
    color: var(--accent-cyan);
  }
  .status-pulse {
    width: 8px;
    height: 8px;
    background: #00e676;
    border-radius: 50%;
    box-shadow: 0 0 8px #00e676;
  }

  /* 筛选过滤条 */
  .filter-bar-container {
    background: rgba(13, 25, 48, 0.6);
    border: 1px solid rgba(0, 229, 255, 0.18);
    border-radius: var(--radius-md);
    padding: 18px 24px;
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
  }
  .filter-group {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 10px;
  }
  .filter-title {
    font-size: 13px;
    color: var(--text-dim);
    margin-right: 6px;
  }
  .filter-btn {
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid rgba(255, 255, 255, 0.1);
    color: var(--text-muted);
    font-size: 13px;
    padding: 5px 14px;
    border-radius: 20px;
    cursor: pointer;
    transition: all 0.2s ease;
  }
  .filter-btn.active, .filter-btn:hover {
    background: rgba(0, 229, 255, 0.15);
    border-color: var(--accent-cyan);
    color: #ffffff;
  }

  /* 轨道卡片列表 */
  .track-card {
    background: rgba(13, 25, 48, 0.7);
    border: 1px solid rgba(0, 229, 255, 0.18);
    border-radius: var(--radius-md);
    padding: 22px;
    margin-bottom: 20px;
    transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    height: 100%;
  }
  .track-card:hover {
    border-color: var(--accent-cyan);
    box-shadow: 0 10px 30px rgba(0, 229, 255, 0.2);
    transform: translateY(-4px);
  }
  .track-top {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 14px;
  }
  .track-code {
    font-family: var(--font-mono);
    font-size: 12px;
    color: var(--accent-cyan);
    background: rgba(0, 229, 255, 0.1);
    padding: 2px 8px;
    border-radius: 4px;
    border: 1px solid rgba(0, 229, 255, 0.25);
  }
  .track-ping {
    font-family: var(--font-mono);
    font-size: 12px;
    color: #00e676;
    display: flex;
    align-items: center;
    gap: 4px;
  }
  .track-title {
    font-size: 18px;
    font-weight: 700;
    color: #ffffff;
    margin-bottom: 8px;
  }
  .track-desc {
    font-size: 13px;
    color: var(--text-muted);
    line-height: 1.6;
    margin-bottom: 18px;
  }
  .audio-waveform-simulation {
    display: flex;
    align-items: flex-end;
    gap: 3px;
    height: 24px;
    margin-bottom: 16px;
    padding: 4px 8px;
    background: rgba(0, 0, 0, 0.25);
    border-radius: 4px;
  }
  .waveform-bar {
    flex: 1;
    background: linear-gradient(180deg, var(--accent-cyan), var(--accent-blue));
    border-radius: 2px;
    opacity: 0.75;
  }
  .track-meta-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-top: 1px solid rgba(255, 255, 255, 0.08);
    padding-top: 14px;
    font-size: 12px;
    color: var(--text-dim);
  }
  .track-actions {
    margin-top: 14px;
    display: flex;
    gap: 10px;
  }
  .track-actions a {
    flex: 1;
    text-align: center;
    padding: 8px 0;
    font-size: 13px;
  }

  /* 负载仪表盘模块 */
  .cluster-stat-box {
    background: rgba(13, 25, 48, 0.6);
    border: 1px solid rgba(0, 229, 255, 0.15);
    border-radius: var(--radius-md);
    padding: 20px;
    height: 100%;
  }
  .cluster-name {
    font-size: 16px;
    font-weight: 700;
    color: #ffffff;
    display: flex;
    justify-content: space-between;
    margin-bottom: 10px;
  }
  .progress-bg {
    background: rgba(255, 255, 255, 0.08);
    border-radius: 10px;
    height: 8px;
    overflow: hidden;
    margin-bottom: 10px;
  }
  .progress-fill {
    background: linear-gradient(90deg, var(--accent-blue), var(--accent-cyan));
    height: 100%;
    border-radius: 10px;
  }
  .cluster-detail {
    display: flex;
    justify-content: space-between;
    font-size: 12px;
    color: var(--text-dim);
    font-family: var(--font-mono);
  }

  /* 故障排查微卡片 */
  .diagnostic-card {
    background: rgba(13, 25, 48, 0.6);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: var(--radius-md);
    padding: 22px;
    height: 100%;
    transition: all 0.25s ease;
  }
  .diagnostic-card:hover {
    border-color: rgba(0, 229, 255, 0.4);
    background: rgba(13, 25, 48, 0.85);
  }
  .diag-icon {
    width: 36px;
    height: 36px;
    background: rgba(0, 229, 255, 0.12);
    border: 1px solid rgba(0, 229, 255, 0.3);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--accent-cyan);
    margin-bottom: 14px;
    font-size: 18px;
  }
  .diag-title {
    font-size: 16px;
    font-weight: 700;
    color: #ffffff;
    margin-bottom: 8px;
  }
  .diag-text {
    font-size: 13px;
    color: var(--text-muted);
    line-height: 1.6;
    margin-bottom: 12px;
  }
  .diag-solution {
    font-size: 12px;
    color: var(--accent-cyan);
    background: rgba(0, 229, 255, 0.06);
    padding: 8px 12px;
    border-radius: 6px;
    border-left: 3px solid var(--accent-cyan);
  }

  /* 紧凑横向发光直通条 */
  .quick-connect-strip {
    background: linear-gradient(135deg, rgba(41, 121, 255, 0.22) 0%, rgba(0, 229, 255, 0.12) 100%);
    border: 1px solid rgba(0, 229, 255, 0.35);
    border-radius: var(--radius-lg);
    padding: 36px 40px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.5);
    position: relative;
    overflow: hidden;
  }
  .quick-connect-strip::before {
    content: "";
    position: absolute;
    top: -50%;
    left: -20%;
    width: 200px;
    height: 200px;
    background: radial-gradient(circle, rgba(0, 229, 255, 0.25) 0%, transparent 70%);
    pointer-events: none;
  }

  /* 基础页脚统一规格 */
  .site-footer {
    background: #05080f;
    border-top: 1px solid rgba(0, 229, 255, 0.15);
    padding: 60px 0 30px;
    color: var(--text-muted);
  }
  .footer-heading {
    font-size: 14px;
    font-weight: 700;
    color: #ffffff;
    margin-bottom: 16px;
    letter-spacing: 0.5px;
    text-transform: uppercase;
  }
  .footer-links {
    list-style: none;
    margin: 0;
    padding: 0;
  }
  .footer-links li {
    margin-bottom: 10px;
  }
  .footer-links a {
    color: var(--text-muted);
    font-size: 13px;
  }
  .footer-links a:hover {
    color: var(--accent-cyan);
  }

  /* 响应式微调 */
  @media screen and (max-width: 63.9375em) {
    .site-header { padding: 12px 0; }
    .category-h1 { font-size: 26px; }
    .quick-connect-strip { padding: 26px 20px; }
  }
  @media screen and (max-width: 39.9375em) {
    .mobile-menu-toggle { display: inline-flex; }
    .filter-bar-container { flex-direction: column; align-items: flex-start; }
    .track-top { flex-direction: column; gap: 8px; }
  }