/* roulang page: index */
:root {
      --bg-deep: #0b0e14;
      --bg-surface: #121721;
      --bg-card: #1a202c;
      --bg-card-hover: #242c3d;
      --primary-cyan: #00f2fe;
      --primary-gradient: linear-gradient(135deg, #00f2fe 0%, #4facfe 100%);
      --accent-purple: #7928ca;
      --accent-magenta: #ff0080;
      --accent-amber: #ff9900;
      --text-main: #f1f5f9;
      --text-muted: #94a3b8;
      --border-subtle: rgba(255, 255, 255, 0.08);
      --border-focus: rgba(0, 242, 254, 0.4);
      --radius-sm: 8px;
      --radius-md: 12px;
      --radius-lg: 16px;
      --radius-pill: 9999px;
      --shadow-card: 0 10px 30px -10px rgba(0, 0, 0, 0.5);
      --shadow-glow: 0 0 25px rgba(0, 242, 254, 0.25);
    }

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

    body {
      background-color: var(--bg-deep);
      color: var(--text-main);
      font-family: system-ui, -apple-system, "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
      line-height: 1.75;
      overflow-x: hidden;
      -webkit-font-smoothing: antialiased;
    }

    a {
      color: var(--primary-cyan);
      text-decoration: none;
      transition: all 0.25s ease;
    }
    a:hover {
      color: #ffffff;
    }

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

    /* 顶部微型状态条 */
    .top-meta-bar {
      background: rgba(11, 14, 20, 0.95);
      font-size: 0.82rem;
      border-bottom: 1px solid var(--border-subtle);
      color: var(--text-muted);
      padding: 6px 0;
    }
    .pulse-dot {
      display: inline-block;
      width: 8px;
      height: 8px;
      border-radius: 50%;
      background: #10b981;
      box-shadow: 0 0 8px #10b981;
      margin-right: 6px;
    }

    /* 悬浮胶囊主导航 */
    .capsule-header {
      position: sticky;
      top: 14px;
      z-index: 1050;
      margin-bottom: -76px;
    }
    .navbar-capsule {
      background: rgba(18, 23, 33, 0.85);
      backdrop-filter: blur(16px);
      -webkit-backdrop-filter: blur(16px);
      border: 1px solid var(--border-subtle);
      border-radius: var(--radius-pill);
      padding: 10px 24px;
      box-shadow: var(--shadow-card);
      transition: border-color 0.3s ease;
    }
    .navbar-capsule:hover {
      border-color: var(--border-focus);
    }
    .brand-logo {
      font-size: 1.25rem;
      font-weight: 800;
      letter-spacing: -0.5px;
      color: #fff;
      display: flex;
      align-items: center;
      gap: 10px;
    }
    .brand-logo i {
      color: var(--primary-cyan);
      font-size: 1.35rem;
    }
    .nav-link {
      color: var(--text-muted) !important;
      font-size: 0.95rem;
      font-weight: 500;
      padding: 6px 14px !important;
      border-radius: var(--radius-pill);
      transition: all 0.2s ease;
    }
    .nav-link:hover, .nav-link.active {
      color: #ffffff !important;
      background: rgba(255, 255, 255, 0.05);
    }
    .btn-capsule-cta {
      background: var(--primary-gradient);
      color: #0b0e14 !important;
      font-weight: 700;
      border-radius: var(--radius-pill);
      padding: 8px 22px;
      border: none;
      box-shadow: 0 4px 15px rgba(0, 242, 254, 0.3);
      transition: transform 0.2s ease, box-shadow 0.2s ease;
    }
    .btn-capsule-cta:hover {
      transform: translateY(-2px);
      box-shadow: 0 6px 20px rgba(0, 242, 254, 0.5);
      color: #000 !important;
    }

    /* 视觉板块通用样式 */
    section {
      padding: 90px 0;
      position: relative;
    }
    .section-light-alt {
      background-color: #0e121a;
      border-top: 1px solid var(--border-subtle);
      border-bottom: 1px solid var(--border-subtle);
    }
    .section-header {
      margin-bottom: 54px;
    }
    .section-tag {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      font-size: 0.8rem;
      font-weight: 600;
      letter-spacing: 1px;
      text-transform: uppercase;
      padding: 4px 14px;
      border-radius: var(--radius-pill);
      background: rgba(0, 242, 254, 0.1);
      color: var(--primary-cyan);
      border: 1px solid rgba(0, 242, 254, 0.25);
      margin-bottom: 14px;
    }
    .section-title {
      font-size: 2.1rem;
      font-weight: 800;
      color: #fff;
      margin-bottom: 16px;
      line-height: 1.35;
    }
    .section-desc {
      color: var(--text-muted);
      font-size: 1.05rem;
      max-width: 680px;
      margin: 0 auto;
    }

    /* 首屏地图感/研发节点感 Hero */
    .hero-area {
      min-height: 85vh;
      display: flex;
      align-items: center;
      padding-top: 140px;
      padding-bottom: 90px;
      background: radial-gradient(circle at 80% 20%, rgba(121, 40, 202, 0.18) 0%, transparent 50%),
                  radial-gradient(circle at 20% 80%, rgba(0, 242, 254, 0.15) 0%, transparent 40%),
                  linear-gradient(rgba(11, 14, 20, 0.88), rgba(11, 14, 20, 0.95)),
                  url('/assets/images/5e6880f7ba4eda0a.jpg') center/cover no-repeat;
    }
    .hero-h1 {
      font-size: 3.2rem;
      font-weight: 900;
      line-height: 1.22;
      letter-spacing: -0.5px;
      margin-bottom: 24px;
      background: linear-gradient(135deg, #ffffff 40%, var(--primary-cyan) 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }
    .hero-lead {
      color: var(--text-muted);
      font-size: 1.15rem;
      margin-bottom: 34px;
      max-width: 620px;
    }
    .hub-badge-group {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      margin-bottom: 32px;
    }
    .hub-badge {
      background: rgba(255, 255, 255, 0.05);
      border: 1px solid var(--border-subtle);
      border-radius: var(--radius-pill);
      padding: 5px 14px;
      font-size: 0.85rem;
      color: var(--text-main);
      display: inline-flex;
      align-items: center;
      gap: 6px;
    }
    .hub-badge i {
      color: var(--primary-cyan);
    }
    .hero-radar-card {
      background: rgba(18, 23, 33, 0.8);
      border: 1px solid var(--border-subtle);
      border-radius: var(--radius-lg);
      padding: 28px;
      backdrop-filter: blur(14px);
      box-shadow: var(--shadow-card);
    }
    .radar-node-item {
      display: flex;
      align-items: center;
      justify-content: space-between;
      padding: 12px 14px;
      border-radius: var(--radius-sm);
      background: rgba(255, 255, 255, 0.02);
      margin-bottom: 10px;
      border: 1px solid transparent;
      transition: all 0.25s ease;
    }
    .radar-node-item:hover {
      background: rgba(255, 255, 255, 0.06);
      border-color: rgba(0, 242, 254, 0.3);
      transform: translateX(4px);
    }

    /* 卡片体系 */
    .craft-card {
      background: var(--bg-surface);
      border: 1px solid var(--border-subtle);
      border-radius: var(--radius-md);
      padding: 30px;
      height: 100%;
      display: flex;
      flex-direction: column;
      transition: all 0.3s ease;
    }
    .craft-card:hover {
      transform: translateY(-6px);
      border-color: rgba(0, 242, 254, 0.35);
      box-shadow: var(--shadow-card);
      background: var(--bg-card-hover);
    }
    .card-icon-box {
      width: 54px;
      height: 54px;
      border-radius: var(--radius-sm);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.45rem;
      margin-bottom: 20px;
      background: rgba(0, 242, 254, 0.1);
      color: var(--primary-cyan);
      border: 1px solid rgba(0, 242, 254, 0.2);
    }
    .card-subtext {
      color: var(--text-muted);
      font-size: 0.94rem;
      line-height: 1.7;
      margin-bottom: 0;
    }

    /* 成果数据计数带 */
    .metrics-band {
      background: linear-gradient(135deg, rgba(20, 27, 39, 0.95), rgba(13, 17, 23, 0.95));
      border-top: 1px solid var(--border-subtle);
      border-bottom: 1px solid var(--border-subtle);
      padding: 60px 0;
    }
    .metric-number {
      font-size: 2.8rem;
      font-weight: 800;
      color: #fff;
      font-family: monospace, sans-serif;
      line-height: 1;
      margin-bottom: 8px;
    }
    .metric-unit {
      color: var(--primary-cyan);
      font-size: 1.3rem;
      margin-left: 2px;
    }

    /* 对比选型表 */
    .compare-container {
      background: var(--bg-surface);
      border: 1px solid var(--border-subtle);
      border-radius: var(--radius-lg);
      overflow: hidden;
    }
    .table-compare {
      width: 100%;
      margin-bottom: 0;
      color: var(--text-main);
      border-collapse: separate;
    }
    .table-compare th, .table-compare td {
      padding: 18px 24px;
      border-bottom: 1px solid var(--border-subtle);
      vertical-align: middle;
      font-size: 0.95rem;
    }
    .table-compare thead th {
      background: rgba(255, 255, 255, 0.03);
      font-weight: 700;
      border-top: none;
    }
    .col-highlight {
      background: rgba(0, 242, 254, 0.04);
      border-left: 1px solid rgba(0, 242, 254, 0.25);
      border-right: 1px solid rgba(0, 242, 254, 0.25);
    }
    th.col-highlight {
      background: rgba(0, 242, 254, 0.12);
      color: var(--primary-cyan);
    }

    /* FAQ 手风琴重塑 */
    .accordion-custom .accordion-item {
      background: var(--bg-surface);
      border: 1px solid var(--border-subtle);
      border-radius: var(--radius-md) !important;
      margin-bottom: 14px;
      overflow: hidden;
    }
    .accordion-custom .accordion-button {
      background: var(--bg-surface);
      color: var(--text-main);
      font-weight: 600;
      font-size: 1.05rem;
      padding: 20px 24px;
      box-shadow: none;
    }
    .accordion-custom .accordion-button:not(.collapsed) {
      color: var(--primary-cyan);
      background: rgba(0, 242, 254, 0.05);
      border-left: 4px solid var(--primary-cyan);
    }
    .accordion-custom .accordion-button::after {
      filter: invert(1);
    }
    .accordion-custom .accordion-body {
      padding: 20px 24px 24px;
      color: var(--text-muted);
      font-size: 0.96rem;
      line-height: 1.8;
      background: rgba(0, 0, 0, 0.15);
    }

    /* 页脚 Footer */
    .footer-core {
      background: #080b10;
      border-top: 1px solid var(--border-subtle);
      padding: 70px 0 30px;
      color: var(--text-muted);
      font-size: 0.92rem;
    }
    .footer-title {
      color: #fff;
      font-weight: 700;
      font-size: 1rem;
      margin-bottom: 20px;
    }
    .footer-list {
      list-style: none;
      padding-left: 0;
    }
    .footer-list li {
      margin-bottom: 10px;
    }
    .footer-list a {
      color: var(--text-muted);
    }
    .footer-list a:hover {
      color: var(--primary-cyan);
    }
    .copyright-band {
      margin-top: 50px;
      padding-top: 25px;
      border-top: 1px solid rgba(255, 255, 255, 0.05);
      font-size: 0.85rem;
    }

    @media (max-width: 991px) {
      .hero-h1 {
        font-size: 2.4rem;
      }
      .navbar-capsule {
        border-radius: var(--radius-lg);
      }
    }
    @media (max-width: 576px) {
      .hero-h1 {
        font-size: 1.95rem;
      }
      section {
        padding: 60px 0;
      }
      .table-responsive {
        border-radius: var(--radius-md);
      }
    }