/* roulang page: index */
:root {
      --bg-base: #060a12;
      --bg-surface: #0c1424;
      --bg-surface-elevated: #131f38;
      --primary-cyan: #00e5ff;
      --primary-blue: #0070f3;
      --accent-glow: rgba(0, 229, 255, 0.45);
      --border-glass: rgba(0, 229, 255, 0.18);
      --border-subtle: rgba(255, 255, 255, 0.08);
      --text-main: #f0f4fc;
      --text-muted: #8ea2c6;
      --card-glass: rgba(12, 20, 36, 0.72);
      --radius-sm: 6px;
      --radius-md: 12px;
      --radius-lg: 20px;
      --transition-fast: all 0.25s ease-in-out;
    }
    * { box-sizing: border-box; margin: 0; padding: 0; }
    body {
      background-color: var(--bg-base);
      color: var(--text-main);
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Microsoft YaHei", sans-serif;
      line-height: 1.6;
      overflow-x: hidden;
    }
    a { color: var(--primary-cyan); text-decoration: none; transition: var(--transition-fast); }
    a:hover { color: #ffffff; }
    .site-header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(6, 10, 18, 0.88);
      backdrop-filter: blur(14px);
      border-bottom: 1px solid var(--border-glass);
      padding: 0.85rem 0;
    }
    .header-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
    }
    .brand-logo {
      display: flex;
      align-items: center;
      gap: 10px;
      font-size: 1.15rem;
      font-weight: 700;
      color: #fff;
      letter-spacing: 0.5px;
    }
    .brand-logo i { color: var(--primary-cyan); font-size: 1.35rem; }
    .nav-links {
      display: flex;
      align-items: center;
      list-style: none;
      gap: 1.6rem;
      margin: 0;
    }
    .nav-links a {
      color: var(--text-muted);
      font-size: 0.95rem;
      font-weight: 500;
      padding: 6px 10px;
      border-radius: var(--radius-sm);
    }
    .nav-links a:hover, .nav-links a.active {
      color: var(--primary-cyan);
      background: rgba(0, 229, 255, 0.08);
    }
    .nav-badge {
      display: inline-block;
      font-size: 0.72rem;
      padding: 2px 7px;
      background: #ff3366;
      color: #fff;
      border-radius: 20px;
      margin-left: 4px;
      vertical-align: middle;
    }
    .btn-glow {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      background: linear-gradient(135deg, #0070f3 0%, #00e5ff 100%);
      color: #060a12;
      font-weight: 700;
      padding: 0.75rem 1.75rem;
      border-radius: 50px;
      box-shadow: 0 0 20px var(--accent-glow);
      border: none;
      cursor: pointer;
      transition: var(--transition-fast);
      font-size: 0.95rem;
    }
    .btn-glow:hover {
      box-shadow: 0 0 32px rgba(0, 229, 255, 0.8);
      color: #000;
      transform: translateY(-2px);
    }
    .btn-outline-glow {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      background: rgba(0, 229, 255, 0.05);
      border: 1px solid var(--primary-cyan);
      color: var(--primary-cyan);
      padding: 0.72rem 1.6rem;
      border-radius: 50px;
      font-weight: 600;
      font-size: 0.95rem;
      transition: var(--transition-fast);
    }
    .btn-outline-glow:hover {
      background: rgba(0, 229, 255, 0.18);
      color: #fff;
      box-shadow: 0 0 15px rgba(0, 229, 255, 0.35);
    }
    .flash-sale-bar {
      background: linear-gradient(90deg, #180927 0%, #290d23 50%, #150921 100%);
      border-bottom: 1px solid rgba(255, 51, 102, 0.3);
      padding: 0.6rem 0;
      font-size: 0.88rem;
    }
    .flash-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      flex-wrap: wrap;
      gap: 12px;
    }
    .timer-wrap { display: flex; align-items: center; gap: 8px; font-weight: 600; color: #ff6489; }
    .timer-badge { background: #ff3366; color: #fff; padding: 2px 6px; border-radius: 4px; font-family: monospace; font-size: 0.9rem; }
    .hero-video-section {
      position: relative;
      min-height: 84vh;
      display: flex;
      align-items: center;
      background: url('/assets/images/4d07421e3070e4a6.jpg') center/cover no-repeat;
      border-bottom: 1px solid var(--border-glass);
      overflow: hidden;
    }
    .hero-video-overlay {
      position: absolute;
      top: 0; left: 0; right: 0; bottom: 0;
      background: linear-gradient(180deg, rgba(6, 10, 18, 0.88) 0%, rgba(6, 10, 18, 0.7) 40%, rgba(6, 10, 18, 0.96) 100%);
    }
    .hero-content {
      position: relative;
      z-index: 2;
      padding: 4rem 0 3.5rem;
      max-width: 900px;
    }
    .hero-kicker {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 6px 14px;
      background: rgba(0, 229, 255, 0.1);
      border: 1px solid var(--primary-cyan);
      border-radius: 30px;
      color: var(--primary-cyan);
      font-size: 0.85rem;
      margin-bottom: 1.4rem;
    }
    .hero-title {
      font-size: clamp(2rem, 3.8vw, 3.3rem);
      font-weight: 800;
      line-height: 1.25;
      margin-bottom: 1.4rem;
      color: #ffffff;
      text-shadow: 0 4px 20px rgba(0,0,0,0.8);
    }
    .hero-desc {
      font-size: 1.05rem;
      color: #ccd7e9;
      margin-bottom: 2rem;
      max-width: 780px;
    }
    .hero-video-panel {
      display: flex;
      align-items: center;
      gap: 1.5rem;
      flex-wrap: wrap;
      margin-top: 2rem;
    }
    .play-trigger {
      display: inline-flex;
      align-items: center;
      gap: 12px;
      background: var(--card-glass);
      backdrop-filter: blur(10px);
      border: 1px solid var(--border-glass);
      padding: 10px 20px;
      border-radius: 40px;
      color: var(--text-main);
      cursor: pointer;
      transition: var(--transition-fast);
    }
    .play-trigger i {
      width: 38px;
      height: 38px;
      border-radius: 50%;
      background: var(--primary-cyan);
      color: #060a12;
      display: flex;
      align-items: center;
      justify-content: center;
      box-shadow: 0 0 12px var(--accent-glow);
    }
    .section-wrap {
      padding: 5rem 0;
      position: relative;
    }
    .section-wrap.alt-bg {
      background-color: var(--bg-surface);
      border-top: 1px solid var(--border-subtle);
      border-bottom: 1px solid var(--border-subtle);
    }
    .section-head {
      margin-bottom: 3.2rem;
      text-align: left;
    }
    .section-tag {
      color: var(--primary-cyan);
      font-weight: 700;
      font-size: 0.85rem;
      letter-spacing: 1px;
      text-transform: uppercase;
      margin-bottom: 0.5rem;
      display: block;
    }
    .section-heading {
      font-size: 1.95rem;
      font-weight: 700;
      margin-bottom: 0.8rem;
      color: #ffffff;
    }
    .section-summary {
      color: var(--text-muted);
      max-width: 760px;
      font-size: 0.98rem;
    }
    .glass-card {
      background: var(--card-glass);
      backdrop-filter: blur(12px);
      border: 1px solid var(--border-glass);
      border-radius: var(--radius-md);
      padding: 1.8rem;
      transition: var(--transition-fast);
      height: 100%;
      display: flex;
      flex-direction: column;
    }
    .glass-card:hover {
      border-color: var(--primary-cyan);
      box-shadow: 0 8px 32px rgba(0, 229, 255, 0.15);
      transform: translateY(-4px);
    }
    .card-icon {
      width: 52px;
      height: 52px;
      background: rgba(0, 229, 255, 0.08);
      border: 1px solid var(--border-glass);
      border-radius: 10px;
      display: flex;
      align-items: center;
      justify-content: center;
      color: var(--primary-cyan);
      font-size: 1.4rem;
      margin-bottom: 1.2rem;
    }
    .card-title {
      font-size: 1.25rem;
      font-weight: 600;
      margin-bottom: 0.75rem;
      color: #ffffff;
    }
    .card-desc {
      color: var(--text-muted);
      font-size: 0.92rem;
      flex-grow: 1;
    }
    .table-container {
      overflow-x: auto;
      border: 1px solid var(--border-glass);
      border-radius: var(--radius-md);
      background: var(--card-glass);
      backdrop-filter: blur(12px);
    }
    .rf-table {
      width: 100%;
      border-collapse: collapse;
      margin: 0;
      text-align: left;
    }
    .rf-table th {
      background: rgba(0, 229, 255, 0.08);
      color: var(--primary-cyan);
      padding: 1.1rem 1.2rem;
      font-size: 0.92rem;
      border-bottom: 1px solid var(--border-glass);
    }
    .rf-table td {
      padding: 1.1rem 1.2rem;
      font-size: 0.9rem;
      border-bottom: 1px solid var(--border-subtle);
      color: #d8e2f0;
    }
    .rf-table tr:hover td {
      background: rgba(0, 229, 255, 0.04);
    }
    .status-pill {
      font-size: 0.78rem;
      padding: 3px 8px;
      border-radius: 4px;
      background: rgba(0, 229, 255, 0.12);
      border: 1px solid rgba(0, 229, 255, 0.4);
      color: var(--primary-cyan);
    }
    .step-num {
      width: 42px;
      height: 42px;
      border-radius: 50%;
      background: rgba(0, 229, 255, 0.12);
      border: 2px solid var(--primary-cyan);
      color: var(--primary-cyan);
      font-weight: 800;
      display: flex;
      align-items: center;
      justify-content: center;
      margin-bottom: 1.2rem;
      font-size: 1.1rem;
    }
    .board-metric {
      background: var(--card-glass);
      border: 1px solid var(--border-glass);
      border-radius: var(--radius-md);
      padding: 1.5rem;
      text-align: center;
    }
    .metric-value {
      font-size: 2.2rem;
      font-weight: 800;
      color: var(--primary-cyan);
      font-family: monospace;
      line-height: 1.2;
    }
    .metric-label {
      color: var(--text-muted);
      font-size: 0.88rem;
      margin-top: 0.4rem;
    }
    .inquiry-form-box {
      background: var(--card-glass);
      backdrop-filter: blur(14px);
      border: 1px solid var(--border-glass);
      border-radius: var(--radius-lg);
      padding: 2.5rem;
      box-shadow: 0 10px 40px rgba(0,0,0,0.5);
    }
    .form-control {
      background: rgba(6, 10, 18, 0.6);
      border: 1px solid var(--border-glass);
      color: #fff;
      padding: 0.75rem 1rem;
      border-radius: var(--radius-sm);
      margin-bottom: 1.2rem;
      width: 100%;
    }
    .form-control:focus {
      outline: none;
      border-color: var(--primary-cyan);
      box-shadow: 0 0 10px rgba(0, 229, 255, 0.3);
      background: rgba(6, 10, 18, 0.8);
    }
    .form-label {
      font-size: 0.88rem;
      color: #c0d0e6;
      margin-bottom: 0.4rem;
      display: block;
    }
    .site-footer {
      background: #03060a;
      border-top: 1px solid var(--border-glass);
      padding: 4.5rem 0 2rem;
      color: var(--text-muted);
      font-size: 0.9rem;
    }
    .footer-col-title {
      color: #fff;
      font-size: 1.05rem;
      font-weight: 600;
      margin-bottom: 1.2rem;
    }
    .footer-links { list-style: none; margin: 0; }
    .footer-links li { margin-bottom: 0.6rem; }
    .footer-links a { color: var(--text-muted); }
    .footer-links a:hover { color: var(--primary-cyan); }
    .copyright-bar {
      margin-top: 3.5rem;
      padding-top: 1.8rem;
      border-top: 1px solid var(--border-subtle);
      font-size: 0.82rem;
      display: flex;
      justify-content: space-between;
      flex-wrap: wrap;
      gap: 1rem;
    }
    @media (max-width: 768px) {
      .nav-links { display: none; }
      .hero-content { padding: 2.5rem 0; }
      .section-wrap { padding: 3.2rem 0; }
      .rf-table th, .rf-table td { padding: 0.7rem 0.6rem; font-size: 0.82rem; }
    }

/* roulang page: index */
:root {
      --bg-dark: #070d19;
      --bg-panel: rgba(13, 25, 48, 0.75);
      --bg-card: rgba(18, 35, 68, 0.65);
      --border-glow: rgba(0, 212, 255, 0.22);
      --border-bright: #00e5ff;
      --primary-cyan: #00f0ff;
      --primary-blue: #0072ff;
      --accent-glow: rgba(0, 240, 255, 0.35);
      --text-main: #f0f6fc;
      --text-sub: #9db2d4;
      --text-muted: #5e7699;
      --badge-bg: rgba(0, 240, 255, 0.12);
      --transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
    }

    * { box-sizing: border-box; }
    body {
      background-color: var(--bg-dark);
      color: var(--text-main);
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
      margin: 0;
      padding: 0;
      line-height: 1.6;
      overflow-x: hidden;
    }

    a { color: var(--primary-cyan); text-decoration: none; transition: var(--transition); }
    a:hover { color: #80f5ff; }

    /* 全局组件与卡片 */
    .glass-card {
      background: var(--bg-card);
      backdrop-filter: blur(16px);
      -webkit-backdrop-filter: blur(16px);
      border: 1px solid var(--border-glow);
      border-radius: 12px;
      padding: 24px;
      position: relative;
      transition: var(--transition);
    }
    .glass-card:hover {
      border-color: rgba(0, 240, 255, 0.5);
      box-shadow: 0 10px 30px rgba(0, 114, 255, 0.25);
      transform: translateY(-4px);
    }

    .btn-glow {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      background: linear-gradient(135deg, #00f0ff 0%, #0072ff 100%);
      color: #031024 !important;
      font-weight: 700;
      padding: 13px 30px;
      border-radius: 6px;
      border: none;
      box-shadow: 0 0 20px var(--accent-glow);
      cursor: pointer;
      transition: var(--transition);
      font-size: 0.95rem;
    }
    .btn-glow:hover {
      box-shadow: 0 0 32px rgba(0, 240, 255, 0.7);
      transform: scale(1.02);
      color: #000 !important;
    }

    .btn-outline {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      background: rgba(0, 240, 255, 0.05);
      color: var(--primary-cyan) !important;
      border: 1px solid var(--primary-cyan);
      font-weight: 600;
      padding: 12px 28px;
      border-radius: 6px;
      transition: var(--transition);
    }
    .btn-outline:hover {
      background: rgba(0, 240, 255, 0.15);
      box-shadow: 0 0 15px rgba(0, 240, 255, 0.25);
    }

    .badge-chip {
      display: inline-block;
      padding: 4px 12px;
      border-radius: 20px;
      background: var(--badge-bg);
      border: 1px solid rgba(0, 240, 255, 0.3);
      color: var(--primary-cyan);
      font-size: 0.78rem;
      letter-spacing: 0.5px;
      margin-bottom: 12px;
    }

    .section-title-wrap {
      text-align: center;
      margin-bottom: 48px;
    }
    .section-title {
      font-size: 2.1rem;
      font-weight: 800;
      color: #fff;
      margin-bottom: 12px;
      letter-spacing: -0.5px;
    }
    .section-subtitle {
      color: var(--text-sub);
      font-size: 1rem;
      max-width: 780px;
      margin: 0 auto;
      line-height: 1.7;
    }

    .section-block {
      padding: 75px 0;
      position: relative;
    }
    .section-alt {
      background: rgba(6, 14, 28, 0.85);
      border-top: 1px solid rgba(255, 255, 255, 0.03);
      border-bottom: 1px solid rgba(255, 255, 255, 0.03);
    }

    /* 顶部导航 */
    .top-header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(7, 13, 25, 0.88);
      backdrop-filter: blur(20px);
      border-bottom: 1px solid rgba(0, 240, 255, 0.15);
    }
    .brand-logo {
      font-size: 1.18rem;
      font-weight: 800;
      color: #fff;
      display: flex;
      align-items: center;
      gap: 10px;
    }
    .brand-logo i {
      color: var(--primary-cyan);
      font-size: 1.35rem;
    }
    .nav-links {
      display: flex;
      gap: 22px;
      align-items: center;
      margin: 0;
      list-style: none;
    }
    .nav-links a {
      color: var(--text-sub);
      font-weight: 500;
      font-size: 0.95rem;
      padding: 6px 0;
      position: relative;
    }
    .nav-links a:hover, .nav-links a.active {
      color: #fff;
    }
    .nav-links a.active::after {
      content: "";
      position: absolute;
      bottom: -4px;
      left: 0;
      width: 100%;
      height: 2px;
      background: var(--primary-cyan);
      box-shadow: 0 0 8px var(--primary-cyan);
    }

    /* 倒计时与闪购栏 */
    .promo-banner {
      background: linear-gradient(90deg, #091a38 0%, #0d2857 50%, #091a38 100%);
      border-bottom: 1px solid rgba(0, 240, 255, 0.25);
      padding: 10px 0;
      font-size: 0.86rem;
    }

    /* Hero：视频遮罩风格 */
    .hero-video-box {
      position: relative;
      min-height: 580px;
      display: flex;
      align-items: center;
      background-image: linear-gradient(to right, rgba(7, 13, 25, 0.94) 30%, rgba(7, 13, 25, 0.72) 100%), url('/assets/images/4d07421e3070e4a6.jpg');
      background-size: cover;
      background-position: center;
      border-bottom: 1px solid rgba(0, 240, 255, 0.15);
    }
    .hero-tag {
      color: var(--primary-cyan);
      font-weight: 700;
      font-size: 0.92rem;
      letter-spacing: 1px;
      text-transform: uppercase;
      margin-bottom: 14px;
      display: inline-block;
    }
    .hero-h1 {
      font-size: 2.75rem;
      font-weight: 800;
      line-height: 1.25;
      color: #ffffff;
      margin-bottom: 18px;
    }
    .hero-desc {
      font-size: 1.05rem;
      color: var(--text-sub);
      line-height: 1.8;
      margin-bottom: 30px;
      max-width: 720px;
    }
    .video-play-btn {
      width: 60px;
      height: 60px;
      border-radius: 50%;
      background: rgba(0, 240, 255, 0.15);
      border: 2px solid var(--primary-cyan);
      display: inline-flex;
      align-items: center;
      justify-content: center;
      color: #fff;
      font-size: 1.2rem;
      cursor: pointer;
      box-shadow: 0 0 20px rgba(0, 240, 255, 0.4);
      margin-right: 18px;
      transition: var(--transition);
    }
    .video-play-btn:hover {
      transform: scale(1.1);
      background: var(--primary-cyan);
      color: #050c17;
    }

    /* 指标看板 */
    .metric-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      margin-top: 25px;
    }
    .metric-card {
      background: rgba(13, 25, 48, 0.8);
      border: 1px solid rgba(0, 240, 255, 0.2);
      padding: 24px 20px;
      border-radius: 10px;
      text-align: center;
    }
    .metric-num {
      font-size: 2.4rem;
      font-weight: 800;
      color: var(--primary-cyan);
      text-shadow: 0 0 15px rgba(0, 240, 255, 0.4);
      margin-bottom: 6px;
    }
    .metric-lbl {
      color: var(--text-sub);
      font-size: 0.9rem;
    }

    /* 表格定制 */
    .custom-table {
      width: 100%;
      border-collapse: collapse;
      margin-top: 15px;
      background: rgba(13, 25, 48, 0.7);
      border-radius: 10px;
      overflow: hidden;
      border: 1px solid rgba(0, 240, 255, 0.2);
    }
    .custom-table th {
      background: rgba(0, 240, 255, 0.12);
      color: #fff;
      padding: 16px;
      text-align: left;
      font-size: 0.92rem;
    }
    .custom-table td {
      padding: 16px;
      color: var(--text-sub);
      border-bottom: 1px solid rgba(255, 255, 255, 0.05);
      font-size: 0.9rem;
    }
    .custom-table tr:hover td {
      background: rgba(0, 240, 255, 0.04);
      color: #fff;
    }

    /* 闪购横轨 */
    .flash-item {
      background: rgba(18, 35, 68, 0.85);
      border: 1px solid rgba(0, 240, 255, 0.25);
      border-radius: 10px;
      padding: 20px;
      position: relative;
      overflow: hidden;
    }
    .flash-badge {
      position: absolute;
      top: 12px;
      right: 12px;
      background: #ff3366;
      color: #fff;
      font-size: 0.75rem;
      padding: 2px 8px;
      border-radius: 4px;
      font-weight: bold;
    }

    /* 流程步骤 */
    .step-track {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      position: relative;
    }
    .step-node {
      background: rgba(13, 25, 48, 0.7);
      border: 1px solid rgba(0, 240, 255, 0.2);
      border-radius: 10px;
      padding: 24px;
      position: relative;
    }
    .step-index {
      font-size: 1.8rem;
      font-weight: 800;
      color: var(--primary-cyan);
      opacity: 0.8;
      margin-bottom: 10px;
    }

    /* 资讯卡片与案例现场 */
    .news-card-img {
      height: 190px;
      width: 100%;
      object-fit: cover;
      border-radius: 8px 8px 0 0;
      border-bottom: 1px solid rgba(0, 240, 255, 0.15);
    }

    /* 快速解答与常见问题 */
    .qa-box {
      border-left: 3px solid var(--primary-cyan);
      background: rgba(18, 35, 68, 0.5);
      padding: 16px 20px;
      margin-bottom: 16px;
      border-radius: 0 8px 8px 0;
    }
    .qa-q {
      font-weight: 700;
      color: #fff;
      font-size: 1rem;
      margin-bottom: 8px;
    }
    .qa-a {
      color: var(--text-sub);
      font-size: 0.92rem;
      margin: 0;
    }

    /* 表单组件 */
    .inquiry-form-card {
      background: rgba(14, 28, 56, 0.9);
      border: 1px solid rgba(0, 240, 255, 0.3);
      padding: 35px;
      border-radius: 12px;
      box-shadow: 0 10px 40px rgba(0, 0, 0, 0.4);
    }
    .form-ctrl {
      background: rgba(8, 17, 34, 0.8);
      border: 1px solid rgba(0, 240, 255, 0.2);
      color: #fff;
      padding: 12px 16px;
      border-radius: 6px;
      width: 100%;
      margin-bottom: 18px;
    }
    .form-ctrl:focus {
      outline: none;
      border-color: var(--primary-cyan);
      box-shadow: 0 0 10px rgba(0, 240, 255, 0.25);
    }

    /* 页脚 */
    .main-footer {
      background: #040811;
      border-top: 1px solid rgba(0, 240, 255, 0.15);
      padding: 60px 0 30px;
      color: var(--text-muted);
      font-size: 0.88rem;
    }
    .footer-logo {
      font-size: 1.25rem;
      font-weight: 800;
      color: #fff;
      margin-bottom: 15px;
      display: inline-block;
    }

    @media (max-width: 1024px) {
      .metric-grid, .step-track { grid-template-columns: repeat(2, 1fr); }
    }
    @media (max-width: 768px) {
      .hero-h1 { font-size: 2rem; }
      .metric-grid, .step-track { grid-template-columns: 1fr; }
      .nav-links { display: none; }
    }

/* roulang page: category2 */
:root {
        --bg-base: #060a12;
        --bg-surface: #0c1424;
        --bg-surface-elevated: #131f38;
        --primary-cyan: #00e5ff;
        --primary-blue: #0070f3;
        --accent-glow: rgba(0, 229, 255, 0.45);
        --border-glass: rgba(0, 229, 255, 0.18);
        --border-subtle: rgba(255, 255, 255, 0.08);
        --text-main: #f0f4fc;
        --text-sub: #9db2d4;
        --text-muted: #8ea2c6;
        --card-glass: rgba(12, 20, 36, 0.72);
        --radius-sm: 6px;
        --radius-md: 12px;
        --radius-lg: 20px;
        --transition-fast: all 0.25s ease-in-out;
    }
    body {
        background-color: var(--bg-base);
        color: var(--text-main);
        font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Microsoft YaHei", sans-serif;
        line-height: 1.6;
        overflow-x: hidden;
    }
    a { color: var(--primary-cyan); text-decoration: none; transition: var(--transition-fast); }
    a:hover { color: #ffffff; }
    .top-header {
        position: sticky;
        top: 0;
        z-index: 1000;
        background: rgba(6, 10, 18, 0.92);
        backdrop-filter: blur(14px);
        border-bottom: 1px solid var(--border-glass);
    }
    .brand-logo {
        display: flex;
        align-items: center;
        gap: 10px;
        font-size: 1.15rem;
        font-weight: 700;
        color: #fff;
        letter-spacing: 0.5px;
    }
    .brand-logo i { color: var(--primary-cyan); font-size: 1.35rem; }
    .nav-links {
        display: flex;
        align-items: center;
        list-style: none;
        gap: 1.6rem;
        margin: 0;
    }
    .nav-links a {
        color: var(--text-muted);
        font-size: 0.95rem;
        font-weight: 500;
        padding: 6px 10px;
        border-radius: var(--radius-sm);
    }
    .nav-links a:hover, .nav-links a.active {
        color: var(--primary-cyan);
        background: rgba(0, 229, 255, 0.08);
    }
    .btn-glow {
        display: inline-flex;
        align-items: center;
        justify-content: center;
        gap: 8px;
        background: linear-gradient(135deg, #0070f3 0%, #00e5ff 100%);
        color: #060a12;
        font-weight: 700;
        padding: 0.75rem 1.75rem;
        border-radius: 50px;
        box-shadow: 0 0 20px var(--accent-glow);
        border: none;
        cursor: pointer;
        transition: var(--transition-fast);
        font-size: 0.95rem;
    }
    .btn-glow:hover {
        box-shadow: 0 0 32px rgba(0, 229, 255, 0.8);
        color: #000;
        transform: translateY(-2px);
    }
    .hero-spec-header {
        position: relative;
        background: linear-gradient(180deg, rgba(12,20,36,0.95) 0%, rgba(6,10,18,0.98) 100%), url('/assets/images/f426b9191cdefb2b.webp') center/cover;
        border-bottom: 1px solid var(--border-glass);
        padding: 4.5rem 0 3.5rem;
    }
    .hero-kicker-spec {
        display: inline-flex;
        align-items: center;
        gap: 8px;
        padding: 6px 14px;
        background: rgba(0, 229, 255, 0.1);
        border: 1px solid var(--primary-cyan);
        border-radius: 30px;
        color: var(--primary-cyan);
        font-size: 0.85rem;
        margin-bottom: 1.2rem;
    }
    .hero-h1 {
        font-size: clamp(2rem, 3.2vw, 2.8rem);
        font-weight: 800;
        line-height: 1.3;
        margin-bottom: 1rem;
        color: #ffffff;
    }
    .hero-desc {
        color: var(--text-sub);
        font-size: 1.05rem;
        max-width: 860px;
        margin-bottom: 1.5rem;
    }
    .spec-filter-bar {
        background: var(--bg-surface-elevated);
        border: 1px solid var(--border-glass);
        border-radius: var(--radius-md);
        padding: 1rem 1.4rem;
        display: flex;
        flex-wrap: wrap;
        gap: 1rem;
        align-items: center;
        justify-content: space-between;
    }
    .spec-tag-group {
        display: flex;
        flex-wrap: wrap;
        gap: 0.5rem;
    }
    .spec-pill {
        padding: 5px 12px;
        border-radius: 20px;
        font-size: 0.82rem;
        background: rgba(0, 229, 255, 0.08);
        border: 1px solid var(--border-glass);
        color: var(--text-main);
    }
    .spec-pill.active {
        background: var(--primary-cyan);
        color: #060a12;
        font-weight: 600;
    }
    .section-wrap {
        padding: 4.5rem 0;
        position: relative;
    }
    .section-wrap.alt-bg {
        background-color: var(--bg-surface);
        border-top: 1px solid var(--border-subtle);
        border-bottom: 1px solid var(--border-subtle);
    }
    .section-head {
        margin-bottom: 2.8rem;
    }
    .section-tag {
        color: var(--primary-cyan);
        font-weight: 700;
        font-size: 0.85rem;
        letter-spacing: 1.2px;
        text-transform: uppercase;
        margin-bottom: 0.4rem;
        display: block;
    }
    .section-heading {
        font-size: 1.85rem;
        font-weight: 700;
        margin-bottom: 0.6rem;
        color: #ffffff;
    }
    .section-summary {
        color: var(--text-muted);
        max-width: 820px;
        font-size: 0.95rem;
    }
    .metric-board {
        display: grid;
        grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
        gap: 1.5rem;
        margin-bottom: 2rem;
    }
    .metric-card {
        background: var(--card-glass);
        border: 1px solid var(--border-glass);
        border-radius: var(--radius-md);
        padding: 1.5rem;
        backdrop-filter: blur(10px);
        transition: var(--transition-fast);
    }
    .metric-card:hover {
        border-color: var(--primary-cyan);
        transform: translateY(-3px);
        box-shadow: 0 10px 25px rgba(0,0,0,0.5);
    }
    .metric-num {
        font-size: 2.1rem;
        font-weight: 800;
        color: var(--primary-cyan);
        line-height: 1.1;
        margin-bottom: 0.4rem;
        font-family: "SF Pro Display", -apple-system, sans-serif;
    }
    .metric-label {
        font-size: 0.92rem;
        color: #ffffff;
        font-weight: 600;
        margin-bottom: 0.3rem;
    }
    .metric-desc {
        font-size: 0.82rem;
        color: var(--text-muted);
        line-height: 1.4;
    }
    .data-table-container {
        background: var(--bg-surface-elevated);
        border: 1px solid var(--border-glass);
        border-radius: var(--radius-md);
        overflow-x: auto;
        box-shadow: 0 15px 35px rgba(0,0,0,0.3);
    }
    .spec-table {
        width: 100%;
        border-collapse: collapse;
        margin-bottom: 0;
        background: transparent;
        color: var(--text-main);
    }
    .spec-table th {
        background: rgba(0, 229, 255, 0.08);
        color: var(--primary-cyan);
        padding: 14px 16px;
        font-size: 0.88rem;
        font-weight: 600;
        text-align: left;
        border-bottom: 1px solid var(--border-glass);
        white-space: nowrap;
    }
    .spec-table td {
        padding: 14px 16px;
        font-size: 0.85rem;
        border-bottom: 1px solid var(--border-subtle);
        vertical-align: middle;
        white-space: nowrap;
    }
    .spec-table tr:hover td {
        background: rgba(0, 229, 255, 0.04);
        color: #fff;
    }
    .highlight-val {
        color: var(--primary-cyan);
        font-weight: 600;
    }
    .status-badge {
        display: inline-block;
        padding: 3px 8px;
        border-radius: 12px;
        font-size: 0.72rem;
        font-weight: 600;
    }
    .badge-mass {
        background: rgba(0, 229, 255, 0.15);
        color: var(--primary-cyan);
        border: 1px solid var(--border-glass);
    }
    .badge-sample {
        background: rgba(255, 170, 0, 0.15);
        color: #ffaa00;
        border: 1px solid rgba(255, 170, 0, 0.3);
    }
    .card-feature {
        background: var(--card-glass);
        border: 1px solid var(--border-glass);
        border-radius: var(--radius-md);
        padding: 1.8rem;
        height: 100%;
        display: flex;
        flex-direction: column;
        justify-content: space-between;
    }
    .card-feature-icon {
        font-size: 1.8rem;
        color: var(--primary-cyan);
        margin-bottom: 1rem;
    }
    .card-feature-title {
        font-size: 1.15rem;
        font-weight: 700;
        color: #ffffff;
        margin-bottom: 0.6rem;
    }
    .card-feature-text {
        color: var(--text-sub);
        font-size: 0.88rem;
        line-height: 1.6;
        margin-bottom: 1.2rem;
    }
    .download-grid {
        display: grid;
        grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
        gap: 1.2rem;
    }
    .download-box {
        background: rgba(13, 25, 48, 0.6);
        border: 1px solid var(--border-subtle);
        border-radius: var(--radius-sm);
        padding: 1.2rem 1.4rem;
        display: flex;
        align-items: center;
        justify-content: space-between;
        transition: var(--transition-fast);
    }
    .download-box:hover {
        border-color: var(--primary-cyan);
        background: rgba(13, 25, 48, 0.9);
        transform: translateX(4px);
    }
    .download-meta {
        display: flex;
        align-items: center;
        gap: 12px;
    }
    .download-icon {
        font-size: 1.5rem;
        color: var(--primary-cyan);
    }
    .download-name {
        font-size: 0.92rem;
        font-weight: 600;
        color: #ffffff;
    }
    .download-size {
        font-size: 0.78rem;
        color: var(--text-muted);
    }
    .faq-accordion-item {
        background: var(--card-glass);
        border: 1px solid var(--border-glass);
        border-radius: var(--radius-md);
        margin-bottom: 1rem;
        overflow: hidden;
    }
    .faq-q {
        padding: 1.2rem 1.5rem;
        font-size: 1rem;
        font-weight: 600;
        color: #ffffff;
        cursor: pointer;
        display: flex;
        align-items: center;
        justify-content: space-between;
        background: rgba(255,255,255,0.02);
    }
    .faq-a {
        padding: 0 1.5rem 1.4rem;
        font-size: 0.9rem;
        color: var(--text-sub);
        line-height: 1.7;
    }
    .cta-banner {
        background: radial-gradient(circle at 50% 50%, rgba(0, 112, 243, 0.25) 0%, rgba(6, 10, 18, 0.95) 75%), url('/assets/images/284c270d55d9949e.webp') center/cover;
        border: 1px solid var(--border-glass);
        border-radius: var(--radius-lg);
        padding: 3.5rem 2rem;
        text-align: center;
        position: relative;
    }
    .main-footer {
        background: #04070d;
        border-top: 1px solid var(--border-subtle);
        padding: 4rem 0 2rem;
        margin-top: 2rem;
    }
    .footer-logo {
        font-size: 1.2rem;
        font-weight: 700;
        color: #fff;
        margin-bottom: 12px;
        display: flex;
        align-items: center;
    }
    .footer-logo i { color: var(--primary-cyan); margin-right: 8px; }
    @media (max-width: 768px) {
        .nav-links { display: none; }
        .hero-h1 { font-size: 1.8rem; }
        .section-wrap { padding: 3rem 0; }
        .spec-filter-bar { flex-direction: column; align-items: flex-start; }
    }

/* roulang page: category1 */
:root {
      --bg-base: #060a12;
      --bg-surface: #0c1424;
      --bg-surface-elevated: #131f38;
      --primary-cyan: #00e5ff;
      --primary-blue: #0070f3;
      --accent-glow: rgba(0, 229, 255, 0.45);
      --border-glass: rgba(0, 229, 255, 0.18);
      --border-subtle: rgba(255, 255, 255, 0.08);
      --text-main: #f0f4fc;
      --text-muted: #8ea2c6;
      --card-glass: rgba(12, 20, 36, 0.72);
      --radius-sm: 6px;
      --radius-md: 12px;
      --radius-lg: 20px;
      --transition-fast: all 0.25s ease-in-out;
    }
    body {
      background-color: var(--bg-base);
      color: var(--text-main);
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Microsoft YaHei", sans-serif;
      line-height: 1.6;
      overflow-x: hidden;
      margin: 0;
      padding: 0;
    }
    a { color: var(--primary-cyan); text-decoration: none; transition: var(--transition-fast); }
    a:hover { color: #ffffff; }
    .top-header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(6, 10, 18, 0.9);
      backdrop-filter: blur(14px);
      border-bottom: 1px solid var(--border-glass);
    }
    .brand-logo {
      display: inline-flex;
      align-items: center;
      gap: 10px;
      font-size: 1.15rem;
      font-weight: 700;
      color: #fff;
      letter-spacing: 0.5px;
    }
    .brand-logo i { color: var(--primary-cyan); font-size: 1.35rem; }
    .nav-links {
      display: flex;
      align-items: center;
      list-style: none;
      gap: 1.2rem;
      margin: 0;
    }
    .nav-links a {
      color: var(--text-muted);
      font-size: 0.92rem;
      font-weight: 500;
      padding: 6px 12px;
      border-radius: var(--radius-sm);
    }
    .nav-links a:hover, .nav-links a.active {
      color: var(--primary-cyan);
      background: rgba(0, 229, 255, 0.08);
      border: 1px solid rgba(0, 229, 255, 0.2);
    }
    .btn-glow {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      background: linear-gradient(135deg, #0070f3 0%, #00e5ff 100%);
      color: #060a12;
      font-weight: 700;
      padding: 0.75rem 1.75rem;
      border-radius: 50px;
      box-shadow: 0 0 20px var(--accent-glow);
      border: none;
      cursor: pointer;
      transition: var(--transition-fast);
      font-size: 0.95rem;
    }
    .btn-glow:hover {
      box-shadow: 0 0 32px rgba(0, 229, 255, 0.8);
      color: #000;
      transform: translateY(-2px);
    }
    .btn-outline-glow {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      background: rgba(0, 229, 255, 0.05);
      border: 1px solid var(--primary-cyan);
      color: var(--primary-cyan);
      padding: 0.72rem 1.6rem;
      border-radius: 50px;
      font-weight: 600;
      font-size: 0.92rem;
      transition: var(--transition-fast);
    }
    .btn-outline-glow:hover {
      background: rgba(0, 229, 255, 0.18);
      color: #fff;
      box-shadow: 0 0 15px rgba(0, 229, 255, 0.35);
    }
    .portal-hero {
      position: relative;
      background: linear-gradient(180deg, rgba(6,10,18,0.7) 0%, rgba(6,10,18,0.95) 100%), url('/assets/images/f426b9191cdefb2b.webp') center/cover no-repeat;
      border-bottom: 1px solid var(--border-glass);
      padding: 4rem 0 4.5rem;
    }
    .hero-badge {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      background: rgba(0, 229, 255, 0.12);
      border: 1px solid var(--primary-cyan);
      color: var(--primary-cyan);
      padding: 5px 14px;
      border-radius: 30px;
      font-size: 0.85rem;
      margin-bottom: 1.2rem;
    }
    .hero-title {
      font-size: clamp(2rem, 3.2vw, 2.9rem);
      font-weight: 800;
      line-height: 1.3;
      color: #ffffff;
      margin-bottom: 1.2rem;
    }
    .hero-desc {
      color: var(--text-muted);
      font-size: 1.05rem;
      line-height: 1.7;
      margin-bottom: 2rem;
    }
    .quick-entry-grid {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 14px;
    }
    .entry-card {
      background: var(--card-glass);
      border: 1px solid var(--border-glass);
      border-radius: var(--radius-md);
      padding: 18px;
      backdrop-filter: blur(10px);
      transition: var(--transition-fast);
      display: block;
    }
    .entry-card:hover {
      border-color: var(--primary-cyan);
      transform: translateY(-3px);
      box-shadow: 0 8px 24px rgba(0, 229, 255, 0.15);
    }
    .entry-card .entry-icon {
      font-size: 1.6rem;
      color: var(--primary-cyan);
      margin-bottom: 8px;
    }
    .entry-card h4 {
      color: #fff;
      font-size: 1rem;
      font-weight: 700;
      margin: 0 0 6px;
    }
    .entry-card p {
      color: var(--text-muted);
      font-size: 0.82rem;
      margin: 0;
      line-height: 1.45;
    }
    .section-wrap {
      padding: 4.8rem 0;
      position: relative;
    }
    .section-wrap.alt-bg {
      background-color: var(--bg-surface);
      border-top: 1px solid var(--border-subtle);
      border-bottom: 1px solid var(--border-subtle);
    }
    .section-head {
      margin-bottom: 2.8rem;
    }
    .section-tag {
      color: var(--primary-cyan);
      font-weight: 700;
      font-size: 0.85rem;
      letter-spacing: 1px;
      text-transform: uppercase;
      margin-bottom: 0.5rem;
      display: block;
    }
    .section-heading {
      font-size: 1.95rem;
      font-weight: 700;
      margin-bottom: 0.8rem;
      color: #ffffff;
    }
    .section-summary {
      color: var(--text-muted);
      max-width: 820px;
      font-size: 0.98rem;
      line-height: 1.7;
    }
    .metric-card {
      background: var(--card-glass);
      border: 1px solid var(--border-glass);
      border-radius: var(--radius-md);
      padding: 1.6rem;
      backdrop-filter: blur(8px);
      text-align: left;
    }
    .metric-val {
      font-size: 2.2rem;
      font-weight: 800;
      color: var(--primary-cyan);
      line-height: 1.1;
      margin-bottom: 0.4rem;
      font-family: monospace;
    }
    .metric-lbl {
      color: #fff;
      font-weight: 600;
      font-size: 0.95rem;
      margin-bottom: 0.4rem;
    }
    .metric-txt {
      color: var(--text-muted);
      font-size: 0.82rem;
      line-height: 1.5;
      margin: 0;
    }
    .product-box {
      background: var(--card-glass);
      border: 1px solid var(--border-subtle);
      border-radius: var(--radius-md);
      overflow: hidden;
      transition: var(--transition-fast);
      display: flex;
      flex-direction: column;
      height: 100%;
    }
    .product-box:hover {
      border-color: var(--primary-cyan);
      box-shadow: 0 10px 30px rgba(0, 229, 255, 0.2);
    }
    .product-img {
      height: 190px;
      width: 100%;
      object-fit: cover;
      border-bottom: 1px solid var(--border-subtle);
    }
    .product-body {
      padding: 1.5rem;
      flex: 1;
      display: flex;
      flex-direction: column;
    }
    .product-model {
      font-size: 1.15rem;
      font-weight: 700;
      color: #fff;
      margin-bottom: 0.35rem;
    }
    .product-freq {
      color: var(--primary-cyan);
      font-size: 0.88rem;
      font-weight: 600;
      margin-bottom: 0.8rem;
      font-family: monospace;
    }
    .param-list {
      list-style: none;
      margin: 0 0 1.2rem;
      padding: 0;
      font-size: 0.85rem;
      color: var(--text-muted);
      border-top: 1px dashed var(--border-subtle);
      padding-top: 0.8rem;
    }
    .param-list li {
      display: flex;
      justify-content: space-between;
      margin-bottom: 0.4rem;
    }
    .param-list span {
      color: #fff;
      font-weight: 600;
    }
    .compare-table-wrap {
      overflow-x: auto;
      background: var(--card-glass);
      border: 1px solid var(--border-glass);
      border-radius: var(--radius-md);
      padding: 1.5rem;
    }
    .compare-table {
      width: 100%;
      border-collapse: collapse;
      color: var(--text-main);
      font-size: 0.9rem;
      margin: 0;
      background: transparent;
    }
    .compare-table th {
      background: rgba(0, 229, 255, 0.08);
      color: var(--primary-cyan);
      padding: 12px 16px;
      text-align: left;
      font-weight: 700;
      border-bottom: 1px solid var(--border-glass);
    }
    .compare-table td {
      padding: 12px 16px;
      border-bottom: 1px solid var(--border-subtle);
      color: #ccd7e9;
    }
    .compare-table tr:hover td {
      background: rgba(255, 255, 255, 0.03);
      color: #fff;
    }
    .timeline-container {
      position: relative;
      border-left: 2px solid var(--border-glass);
      margin-left: 20px;
      padding-left: 30px;
    }
    .timeline-item {
      position: relative;
      margin-bottom: 2.2rem;
    }
    .timeline-item::before {
      content: '';
      position: absolute;
      left: -37px;
      top: 4px;
      width: 12px;
      height: 12px;
      border-radius: 50%;
      background: var(--primary-cyan);
      box-shadow: 0 0 10px var(--primary-cyan);
    }
    .timeline-title {
      font-size: 1.1rem;
      color: #fff;
      font-weight: 700;
      margin-bottom: 0.4rem;
    }
    .timeline-desc {
      color: var(--text-muted);
      font-size: 0.88rem;
      line-height: 1.6;
      margin: 0;
    }
    .inquiry-panel {
      background: linear-gradient(135deg, rgba(13,25,48,0.9) 0%, rgba(19,31,56,0.95) 100%);
      border: 1px solid var(--primary-cyan);
      border-radius: var(--radius-lg);
      padding: 2.5rem;
      box-shadow: 0 0 35px rgba(0, 229, 255, 0.15);
    }
    .form-ctrl {
      background: rgba(6, 10, 18, 0.8);
      border: 1px solid var(--border-glass);
      color: #fff;
      border-radius: var(--radius-sm);
      padding: 10px 14px;
      margin-bottom: 1.2rem;
      width: 100%;
    }
    .form-ctrl:focus {
      background: rgba(12, 20, 36, 0.95);
      border-color: var(--primary-cyan);
      outline: none;
      box-shadow: 0 0 10px rgba(0, 229, 255, 0.4);
    }
    .faq-item {
      background: var(--card-glass);
      border: 1px solid var(--border-subtle);
      border-radius: var(--radius-md);
      padding: 1.4rem;
      margin-bottom: 1rem;
    }
    .faq-q {
      font-size: 1rem;
      font-weight: 700;
      color: #fff;
      margin-bottom: 0.5rem;
      display: flex;
      align-items: center;
      gap: 10px;
    }
    .faq-q i { color: var(--primary-cyan); }
    .faq-a {
      color: var(--text-muted);
      font-size: 0.88rem;
      line-height: 1.6;
      margin: 0;
    }
    .main-footer {
      background: #04070c;
      border-top: 1px solid var(--border-subtle);
      padding: 4rem 0 2rem;
      color: var(--text-muted);
    }
    .footer-logo {
      font-size: 1.2rem;
      font-weight: 700;
      color: #fff;
      margin-bottom: 1rem;
      display: inline-flex;
      align-items: center;
    }
    .footer-bottom {
      border-top: 1px solid var(--border-subtle);
      padding-top: 1.8rem;
      margin-top: 2rem;
      text-align: center;
      font-size: 0.82rem;
      color: var(--text-muted);
    }
    @media (max-width: 768px) {
      .quick-entry-grid { grid-template-columns: 1fr; }
      .nav-links { display: none; }
      .timeline-container { margin-left: 10px; padding-left: 20px; }
      .timeline-item::before { left: -27px; }
      .inquiry-panel { padding: 1.5rem; }
    }

/* roulang page: category4 */
:root {
            --bg-base: #060a12;
            --bg-surface: #0c1424;
            --bg-surface-elevated: #131f38;
            --primary-cyan: #00e5ff;
            --primary-blue: #0070f3;
            --accent-glow: rgba(0, 229, 255, 0.45);
            --border-glass: rgba(0, 229, 255, 0.18);
            --border-subtle: rgba(255, 255, 255, 0.08);
            --text-main: #f0f4fc;
            --text-muted: #8ea2c6;
            --text-sub: #9db2d4;
            --card-glass: rgba(12, 20, 36, 0.72);
            --radius-sm: 6px;
            --radius-md: 12px;
            --radius-lg: 20px;
            --transition-fast: all 0.25s ease-in-out;
        }
        body {
            background-color: var(--bg-base);
            color: var(--text-main);
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Microsoft YaHei", sans-serif;
            line-height: 1.6;
            overflow-x: hidden;
        }
        a { color: var(--primary-cyan); text-decoration: none; transition: var(--transition-fast); }
        a:hover { color: #ffffff; }
        .top-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: rgba(6, 10, 18, 0.92);
            backdrop-filter: blur(14px);
            border-bottom: 1px solid var(--border-glass);
        }
        .brand-logo {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            font-size: 1.15rem;
            font-weight: 700;
            color: #fff;
            letter-spacing: 0.5px;
        }
        .brand-logo i { color: var(--primary-cyan); font-size: 1.35rem; }
        .nav-links {
            display: flex;
            align-items: center;
            list-style: none;
            gap: 1.6rem;
            margin: 0;
        }
        .nav-links a {
            color: var(--text-muted);
            font-size: 0.95rem;
            font-weight: 500;
            padding: 6px 10px;
            border-radius: var(--radius-sm);
        }
        .nav-links a:hover, .nav-links a.active {
            color: var(--primary-cyan);
            background: rgba(0, 229, 255, 0.08);
        }
        .btn-glow {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            background: linear-gradient(135deg, #0070f3 0%, #00e5ff 100%);
            color: #060a12;
            font-weight: 700;
            padding: 0.75rem 1.75rem;
            border-radius: 50px;
            box-shadow: 0 0 20px var(--accent-glow);
            border: none;
            cursor: pointer;
            transition: var(--transition-fast);
            font-size: 0.95rem;
        }
        .btn-glow:hover {
            box-shadow: 0 0 32px rgba(0, 229, 255, 0.8);
            color: #000;
            transform: translateY(-2px);
        }
        .btn-outline-glow {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(0, 229, 255, 0.05);
            border: 1px solid var(--primary-cyan);
            color: var(--primary-cyan);
            padding: 0.72rem 1.6rem;
            border-radius: 50px;
            font-weight: 600;
            font-size: 0.95rem;
            transition: var(--transition-fast);
        }
        .btn-outline-glow:hover {
            background: rgba(0, 229, 255, 0.18);
            color: #fff;
            box-shadow: 0 0 15px rgba(0, 229, 255, 0.35);
        }
        .section-wrap {
            padding: 5rem 0;
            position: relative;
        }
        .section-wrap.alt-bg {
            background-color: var(--bg-surface);
            border-top: 1px solid var(--border-subtle);
            border-bottom: 1px solid var(--border-subtle);
        }
        .section-tag {
            color: var(--primary-cyan);
            font-weight: 700;
            font-size: 0.85rem;
            letter-spacing: 1px;
            text-transform: uppercase;
            margin-bottom: 0.5rem;
            display: block;
        }
        .section-heading {
            font-size: 2rem;
            font-weight: 700;
            margin-bottom: 0.8rem;
            color: #ffffff;
        }
        .section-summary {
            color: var(--text-muted);
            max-width: 780px;
            font-size: 0.98rem;
            line-height: 1.7;
        }
        .glass-card {
            background: var(--card-glass);
            backdrop-filter: blur(12px);
            border: 1px solid var(--border-glass);
            border-radius: var(--radius-md);
            padding: 1.8rem;
            transition: var(--transition-fast);
            height: 100%;
            display: flex;
            flex-direction: column;
        }
        .glass-card:hover {
            border-color: var(--primary-cyan);
            box-shadow: 0 8px 30px rgba(0, 229, 255, 0.18);
            transform: translateY(-4px);
        }
        .metric-badge {
            background: rgba(0, 229, 255, 0.12);
            color: var(--primary-cyan);
            padding: 4px 10px;
            border-radius: 4px;
            font-size: 0.8rem;
            font-weight: 600;
            display: inline-block;
            margin-bottom: 12px;
        }
        .data-kpi {
            font-size: 2.2rem;
            font-weight: 800;
            color: #ffffff;
            line-height: 1.1;
            margin-bottom: 6px;
            font-family: monospace;
        }
        .data-kpi span {
            font-size: 1rem;
            color: var(--primary-cyan);
            font-weight: normal;
        }
        .compare-table-box {
            background: var(--bg-surface);
            border: 1px solid var(--border-glass);
            border-radius: var(--radius-md);
            overflow: hidden;
        }
        .compare-table {
            width: 100%;
            margin-bottom: 0;
            border-collapse: collapse;
            color: var(--text-main);
        }
        .compare-table th {
            background: rgba(0, 229, 255, 0.08);
            color: var(--primary-cyan);
            font-weight: 700;
            padding: 14px 16px;
            border: none;
            border-bottom: 1px solid var(--border-glass);
            font-size: 0.9rem;
        }
        .compare-table td {
            padding: 14px 16px;
            border: none;
            border-bottom: 1px solid var(--border-subtle);
            font-size: 0.88rem;
            vertical-align: middle;
        }
        .compare-table tr:last-child td {
            border-bottom: none;
        }
        .step-timeline-item {
            position: relative;
            padding-left: 2rem;
            border-left: 2px solid var(--border-glass);
            margin-bottom: 2rem;
        }
        .step-timeline-item::before {
            content: '';
            position: absolute;
            left: -7px;
            top: 4px;
            width: 12px;
            height: 12px;
            border-radius: 50%;
            background: var(--primary-cyan);
            box-shadow: 0 0 10px var(--primary-cyan);
        }
        .faq-item {
            background: var(--bg-surface);
            border: 1px solid var(--border-glass);
            border-radius: var(--radius-sm);
            padding: 1.4rem;
            margin-bottom: 1rem;
        }
        .faq-question {
            color: #ffffff;
            font-weight: 700;
            font-size: 1.05rem;
            margin-bottom: 0.6rem;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .faq-question i {
            color: var(--primary-cyan);
        }
        .faq-answer {
            color: var(--text-muted);
            font-size: 0.92rem;
            line-height: 1.7;
            margin: 0;
        }
        .input-glass {
            background: rgba(6, 10, 18, 0.8) !important;
            border: 1px solid var(--border-glass) !important;
            color: #ffffff !important;
            border-radius: var(--radius-sm) !important;
            padding: 12px 16px !important;
            height: auto !important;
            box-shadow: none !important;
        }
        .input-glass:focus {
            border-color: var(--primary-cyan) !important;
            box-shadow: 0 0 10px rgba(0, 229, 255, 0.3) !important;
        }
        .main-footer {
            background: #04070d;
            border-top: 1px solid var(--border-glass);
            padding: 4.5rem 0 2rem;
        }
        .footer-logo {
            font-size: 1.15rem;
            font-weight: 700;
            color: #ffffff;
            margin-bottom: 1rem;
            display: flex;
            align-items: center;
        }
        @media screen and (max-width: 768px) {
            .nav-links { display: none; }
            .section-heading { font-size: 1.55rem; }
            .section-wrap { padding: 3.5rem 0; }
        }

/* roulang page: category3 */
:root {
      --bg-base: #060a12;
      --bg-surface: #0c1424;
      --bg-surface-elevated: #131f38;
      --primary-cyan: #00e5ff;
      --primary-blue: #0070f3;
      --accent-glow: rgba(0, 229, 255, 0.45);
      --border-glass: rgba(0, 229, 255, 0.18);
      --border-subtle: rgba(255, 255, 255, 0.08);
      --text-main: #f0f4fc;
      --text-muted: #8ea2c6;
      --card-glass: rgba(12, 20, 36, 0.72);
      --radius-sm: 6px;
      --radius-md: 12px;
      --radius-lg: 20px;
      --transition-fast: all 0.25s ease-in-out;
      --gold-border: rgba(245, 197, 24, 0.35);
      --gold-gradient: linear-gradient(135deg, #f5c518 0%, #ff9800 100%);
      --gold-glow: rgba(245, 197, 24, 0.35);
    }
    body {
      background-color: var(--bg-base);
      color: var(--text-main);
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Microsoft YaHei", sans-serif;
      line-height: 1.6;
      overflow-x: hidden;
      margin: 0;
      padding: 0;
    }
    a { color: var(--primary-cyan); text-decoration: none; transition: var(--transition-fast); }
    a:hover { color: #ffffff; }

    /* 全局头部导航系统 */
    .top-header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(6, 10, 18, 0.9);
      backdrop-filter: blur(14px);
      border-bottom: 1px solid var(--border-glass);
    }
    .brand-logo {
      display: inline-flex;
      align-items: center;
      gap: 10px;
      font-size: 1.15rem;
      font-weight: 700;
      color: #fff;
      letter-spacing: 0.5px;
    }
    .brand-logo i { color: var(--primary-cyan); font-size: 1.35rem; }
    .nav-links {
      display: flex;
      align-items: center;
      list-style: none;
      gap: 1.6rem;
      margin: 0;
    }
    .nav-links a {
      color: var(--text-muted);
      font-size: 0.95rem;
      font-weight: 500;
      padding: 6px 12px;
      border-radius: var(--radius-sm);
    }
    .nav-links a:hover, .nav-links a.active {
      color: var(--primary-cyan);
      background: rgba(0, 229, 255, 0.08);
    }
    .btn-glow {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      background: linear-gradient(135deg, #0070f3 0%, #00e5ff 100%);
      color: #060a12;
      font-weight: 700;
      padding: 0.75rem 1.75rem;
      border-radius: 50px;
      box-shadow: 0 0 20px var(--accent-glow);
      border: none;
      cursor: pointer;
      transition: var(--transition-fast);
      font-size: 0.95rem;
    }
    .btn-glow:hover {
      box-shadow: 0 0 32px rgba(0, 229, 255, 0.8);
      color: #000;
      transform: translateY(-2px);
    }
    .btn-gold {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      background: var(--gold-gradient);
      color: #060a12;
      font-weight: 700;
      padding: 0.75rem 1.8rem;
      border-radius: 50px;
      box-shadow: 0 0 20px var(--gold-glow);
      border: none;
      cursor: pointer;
      transition: var(--transition-fast);
      font-size: 0.95rem;
    }
    .btn-gold:hover {
      transform: translateY(-2px);
      box-shadow: 0 0 30px rgba(245, 197, 24, 0.75);
      color: #000;
    }

    /* 独立板块系统 */
    .section-wrap {
      padding: 5rem 0;
      position: relative;
    }
    .section-wrap.alt-bg {
      background-color: var(--bg-surface);
      border-top: 1px solid var(--border-subtle);
      border-bottom: 1px solid var(--border-subtle);
    }
    .section-head {
      margin-bottom: 3rem;
      text-align: left;
    }
    .section-tag {
      color: var(--primary-cyan);
      font-weight: 700;
      font-size: 0.85rem;
      letter-spacing: 1px;
      text-transform: uppercase;
      margin-bottom: 0.5rem;
      display: inline-block;
    }
    .section-heading {
      font-size: 2rem;
      font-weight: 700;
      margin-bottom: 0.8rem;
      color: #ffffff;
      line-height: 1.3;
    }
    .section-summary {
      color: var(--text-muted);
      max-width: 800px;
      font-size: 0.98rem;
      line-height: 1.7;
    }

    /* 黑金会员感 Hero */
    .hero-blackgold {
      position: relative;
      background: radial-gradient(circle at 85% 20%, rgba(245, 197, 24, 0.08) 0%, transparent 60%),
                  radial-gradient(circle at 15% 80%, rgba(0, 112, 243, 0.12) 0%, transparent 60%),
                  url('/assets/images/f426b9191cdefb2b.webp') center/cover no-repeat;
      padding: 5.5rem 0 4.8rem;
      border-bottom: 1px solid var(--border-glass);
      overflow: hidden;
    }
    .hero-blackgold::before {
      content: "";
      position: absolute;
      top: 0; left: 0; right: 0; bottom: 0;
      background: linear-gradient(180deg, rgba(6, 10, 18, 0.92) 0%, rgba(6, 10, 18, 0.84) 60%, var(--bg-base) 100%);
      z-index: 1;
    }
    .hero-content {
      position: relative;
      z-index: 2;
    }
    .tier-badge {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 6px 16px;
      background: rgba(245, 197, 24, 0.1);
      border: 1px solid var(--gold-border);
      border-radius: 30px;
      color: #f5c518;
      font-size: 0.88rem;
      font-weight: 600;
      margin-bottom: 1.5rem;
    }
    .tier-badge i { font-size: 1rem; }
    .hero-title {
      font-size: clamp(2.1rem, 3.8vw, 3.2rem);
      font-weight: 800;
      line-height: 1.25;
      color: #ffffff;
      margin-bottom: 1.4rem;
    }
    .hero-title span {
      background: linear-gradient(90deg, #ffffff 30%, #f5c518 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }

    /* 玻璃卡片体系 */
    .glass-card {
      background: var(--card-glass);
      backdrop-filter: blur(12px);
      border: 1px solid var(--border-glass);
      border-radius: var(--radius-md);
      padding: 2rem;
      transition: var(--transition-fast);
      height: 100%;
      display: flex;
      flex-direction: column;
    }
    .glass-card:hover {
      border-color: var(--primary-cyan);
      box-shadow: 0 10px 30px rgba(0, 229, 255, 0.15);
      transform: translateY(-3px);
    }

    /* 指标看板 */
    .metric-box {
      background: rgba(19, 31, 56, 0.6);
      border: 1px solid var(--border-subtle);
      border-radius: var(--radius-md);
      padding: 1.6rem 1.4rem;
      text-align: center;
      transition: var(--transition-fast);
    }
    .metric-box:hover {
      border-color: var(--primary-cyan);
      background: rgba(19, 31, 56, 0.9);
    }
    .metric-val {
      font-size: 2.3rem;
      font-weight: 800;
      color: #ffffff;
      margin-bottom: 0.3rem;
      font-family: Consolas, monospace;
    }
    .metric-val span {
      font-size: 1rem;
      color: var(--primary-cyan);
      margin-left: 2px;
      font-weight: 500;
    }
    .metric-lbl {
      font-size: 0.88rem;
      color: var(--text-muted);
    }

    /* 方案卡片与架构图 */
    .scheme-media {
      border-radius: var(--radius-sm);
      overflow: hidden;
      margin-bottom: 1.4rem;
      position: relative;
      border: 1px solid var(--border-subtle);
    }
    .scheme-media img {
      width: 100%;
      height: 220px;
      object-fit: cover;
      display: block;
      transition: transform 0.5s ease;
    }
    .glass-card:hover .scheme-media img {
      transform: scale(1.04);
    }
    .param-tag-list {
      display: flex;
      flex-wrap: wrap;
      gap: 8px;
      margin: 1.2rem 0;
    }
    .param-tag {
      font-size: 0.78rem;
      padding: 4px 10px;
      border-radius: 4px;
      background: rgba(0, 229, 255, 0.08);
      color: var(--primary-cyan);
      border: 1px solid rgba(0, 229, 255, 0.2);
    }

    /* 方案对比表 */
    .spec-table-box {
      border-radius: var(--radius-md);
      overflow-x: auto;
      border: 1px solid var(--border-subtle);
      background: rgba(12, 20, 36, 0.7);
    }
    .spec-table {
      width: 100%;
      border-collapse: collapse;
      margin: 0;
      font-size: 0.9rem;
      text-align: left;
    }
    .spec-table th {
      background: rgba(19, 31, 56, 0.9);
      color: #fff;
      padding: 16px 20px;
      font-weight: 600;
      border-bottom: 1px solid var(--border-glass);
      white-space: nowrap;
    }
    .spec-table td {
      padding: 15px 20px;
      border-bottom: 1px solid var(--border-subtle);
      color: var(--text-muted);
    }
    .spec-table tr:hover td {
      background: rgba(0, 229, 255, 0.04);
      color: var(--text-main);
    }

    /* 里程碑流程轴 */
    .milestone-track {
      position: relative;
      padding: 1rem 0;
    }
    .milestone-track::before {
      content: "";
      position: absolute;
      top: 30px;
      left: 20px;
      bottom: 30px;
      width: 2px;
      background: linear-gradient(180deg, var(--primary-cyan) 0%, rgba(0, 229, 255, 0.1) 100%);
    }
    .milestone-step {
      position: relative;
      padding-left: 55px;
      margin-bottom: 2.2rem;
    }
    .milestone-dot {
      position: absolute;
      left: 12px;
      top: 4px;
      width: 18px;
      height: 18px;
      border-radius: 50%;
      background: var(--bg-base);
      border: 3px solid var(--primary-cyan);
      box-shadow: 0 0 10px var(--accent-glow);
    }

    /* 常见解答 Accordion */
    .faq-block {
      background: rgba(12, 20, 36, 0.6);
      border: 1px solid var(--border-subtle);
      border-radius: var(--radius-sm);
      margin-bottom: 1rem;
      padding: 1.4rem;
      transition: var(--transition-fast);
    }
    .faq-block:hover {
      border-color: var(--border-glass);
    }
    .faq-q {
      font-size: 1.05rem;
      font-weight: 600;
      color: #ffffff;
      margin-bottom: 0.6rem;
      display: flex;
      align-items: center;
      gap: 10px;
    }
    .faq-q i {
      color: var(--primary-cyan);
      font-size: 0.95rem;
    }
    .faq-a {
      font-size: 0.92rem;
      color: var(--text-muted);
      line-height: 1.7;
      margin: 0;
    }

    /* 底部收口设计 */
    .main-footer {
      background: #04070d;
      border-top: 1px solid var(--border-subtle);
      padding: 4.5rem 0 2rem;
    }
    .footer-logo {
      font-size: 1.15rem;
      font-weight: 700;
      color: #fff;
      margin-bottom: 14px;
    }

    /* 移动端调整 */
    @media (max-width: 860px) {
      .nav-links { display: none; }
      .hero-title { font-size: 1.85rem; }
      .section-heading { font-size: 1.6rem; }
      .section-wrap { padding: 3.5rem 0; }
    }