/* roulang page: index */
:root {
      --bg-dark: #0A0F1D;
      --bg-alt: #0F172A;
      --card-bg: rgba(15, 23, 42, 0.72);
      --card-border: rgba(0, 240, 255, 0.18);
      --primary-blue: #0066FF;
      --neon-cyan: #00F0FF;
      --accent-orange: #FF5722;
      --text-main: #FFFFFF;
      --text-muted: #94A3B8;
      --text-sub: #64748B;
      --font-stack: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
    }

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

    body {
      background-color: var(--bg-dark);
      color: var(--text-main);
      font-family: var(--font-stack);
      line-height: 1.65;
      overflow-x: hidden;
      -webkit-font-smoothing: antialiased;
    }

    a {
      color: var(--neon-cyan);
      text-decoration: none;
      transition: all 0.3s ease;
    }
    a:hover {
      color: #fff;
    }

    /* 顶部滚动通告栏 */
    .top-bar {
      background: rgba(10, 15, 29, 0.95);
      border-bottom: 1px solid rgba(255, 255, 255, 0.08);
      font-size: 0.82rem;
      padding: 6px 0;
    }
    .top-bar .node-badge {
      background: rgba(0, 240, 255, 0.12);
      color: var(--neon-cyan);
      border: 1px solid rgba(0, 240, 255, 0.3);
      padding: 2px 8px;
      border-radius: 4px;
      display: inline-flex;
      align-items: center;
      gap: 6px;
    }
    .pulse-dot {
      width: 7px;
      height: 7px;
      background-color: #00e676;
      border-radius: 50%;
      box-shadow: 0 0 8px #00e676;
      animation: pulse 1.8s infinite;
    }
    @keyframes pulse {
      0% { transform: scale(0.95); opacity: 0.8; }
      50% { transform: scale(1.3); opacity: 1; }
      100% { transform: scale(0.95); opacity: 0.8; }
    }

    /* 主导航 */
    .navbar-custom {
      background: rgba(15, 23, 42, 0.85);
      backdrop-filter: blur(16px);
      -webkit-backdrop-filter: blur(16px);
      border-bottom: 1px solid rgba(0, 240, 255, 0.12);
      position: sticky;
      top: 0;
      z-index: 1030;
      padding: 12px 0;
    }
    .brand-logo {
      font-size: 1.35rem;
      font-weight: 800;
      letter-spacing: 0.5px;
      background: linear-gradient(135deg, #FFFFFF 20%, var(--neon-cyan) 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      display: flex;
      align-items: center;
      gap: 8px;
    }

    /* 赛事时间线活动状态 Chip */
    .timeline-chips {
      display: flex;
      gap: 8px;
      background: rgba(0, 0, 0, 0.3);
      padding: 4px 8px;
      border-radius: 30px;
      border: 1px solid rgba(255, 255, 255, 0.06);
    }
    .event-chip {
      font-size: 0.75rem;
      padding: 3px 10px;
      border-radius: 20px;
      color: var(--text-muted);
      cursor: pointer;
      transition: all 0.25s;
    }
    .event-chip.active {
      background: linear-gradient(135deg, rgba(0, 102, 255, 0.4), rgba(0, 240, 255, 0.4));
      color: #fff;
      border: 1px solid var(--neon-cyan);
      box-shadow: 0 0 10px rgba(0, 240, 255, 0.3);
    }
    .event-chip.live-chip {
      color: #ff9100;
    }

    .nav-link {
      color: var(--text-muted) !important;
      font-size: 0.92rem;
      font-weight: 500;
      padding: 8px 14px !important;
      transition: color 0.3s;
    }
    .nav-link:hover, .nav-link:focus {
      color: var(--neon-cyan) !important;
    }

    /* 发光按钮体系 */
    .btn-glow {
      background: linear-gradient(135deg, var(--primary-blue), var(--neon-cyan));
      color: #FFFFFF !important;
      font-weight: 600;
      border: none;
      padding: 10px 24px;
      border-radius: 6px;
      box-shadow: 0 0 18px rgba(0, 240, 255, 0.35);
      transition: all 0.3s ease;
      display: inline-flex;
      align-items: center;
      gap: 8px;
    }
    .btn-glow:hover {
      box-shadow: 0 0 28px rgba(0, 240, 255, 0.65);
      transform: translateY(-2px);
      color: #fff;
    }

    .btn-outline-glow {
      background: transparent;
      color: var(--neon-cyan) !important;
      font-weight: 600;
      border: 1px solid var(--neon-cyan);
      padding: 10px 22px;
      border-radius: 6px;
      transition: all 0.3s ease;
      display: inline-flex;
      align-items: center;
      gap: 8px;
    }
    .btn-outline-glow:hover {
      background: rgba(0, 240, 255, 0.12);
      box-shadow: 0 0 18px rgba(0, 240, 255, 0.25);
      transform: translateY(-2px);
    }

    /* 页面各 Section 统一样式 */
    section {
      padding: 70px 0;
      position: relative;
    }
    .section-alt {
      background-color: var(--bg-alt);
    }
    .section-title {
      font-size: 2.1rem;
      font-weight: 700;
      color: #fff;
      margin-bottom: 12px;
      letter-spacing: -0.5px;
    }
    .section-sub {
      color: var(--text-muted);
      font-size: 1rem;
      max-width: 760px;
      margin: 0 auto 40px auto;
      line-height: 1.7;
    }

    /* 玻璃拟态卡片 */
    .glass-card {
      background: var(--card-bg);
      border: 1px solid var(--card-border);
      border-radius: 12px;
      padding: 28px;
      backdrop-filter: blur(16px);
      -webkit-backdrop-filter: blur(16px);
      box-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.37);
      transition: all 0.3s ease;
      height: 100%;
    }
    .glass-card:hover {
      border-color: rgba(0, 240, 255, 0.45);
      box-shadow: 0 12px 36px 0 rgba(0, 240, 255, 0.15);
      transform: translateY(-3px);
    }

    /* Hero 白皮书获客区 */
    .hero-section {
      padding: 60px 0 80px 0;
      background: radial-gradient(circle at 80% 20%, rgba(0, 102, 255, 0.15) 0%, transparent 50%),
                  radial-gradient(circle at 20% 80%, rgba(0, 240, 255, 0.1) 0%, transparent 40%),
                  var(--bg-dark);
      border-bottom: 1px solid rgba(255, 255, 255, 0.06);
    }
    .hero-h1 {
      font-size: 2.7rem;
      font-weight: 800;
      line-height: 1.25;
      margin-bottom: 20px;
      color: #FFFFFF;
    }
    .hero-desc {
      color: var(--text-muted);
      font-size: 1.05rem;
      line-height: 1.75;
      margin-bottom: 30px;
    }
    .whitepaper-cover {
      border: 2px solid rgba(0, 240, 255, 0.3);
      border-radius: 10px;
      box-shadow: 0 16px 40px rgba(0, 0, 0, 0.6);
      width: 100%;
      height: auto;
      display: block;
    }
    .catalog-list li {
      margin-bottom: 8px;
      color: var(--text-muted);
      font-size: 0.9rem;
      display: flex;
      align-items: center;
      gap: 10px;
    }
    .catalog-list li i {
      color: var(--neon-cyan);
      font-size: 0.8rem;
    }

    /* 指标展示 */
    .stat-number {
      font-size: 2.6rem;
      font-weight: 800;
      background: linear-gradient(135deg, #FFFFFF, var(--neon-cyan));
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      line-height: 1.1;
      margin-bottom: 6px;
    }
    .stat-label {
      color: var(--text-muted);
      font-size: 0.9rem;
      font-weight: 500;
    }

    /* 架构矩阵 */
    .matrix-icon {
      font-size: 2.2rem;
      color: var(--neon-cyan);
      margin-bottom: 18px;
      display: inline-block;
    }
    .matrix-title {
      font-size: 1.25rem;
      font-weight: 700;
      color: #fff;
      margin-bottom: 12px;
    }
    .matrix-text {
      color: var(--text-muted);
      font-size: 0.92rem;
      line-height: 1.65;
    }

    /* 算力对比 */
    .compare-card {
      background: rgba(15, 23, 42, 0.8);
      border-radius: 10px;
      padding: 24px;
      border: 1px solid rgba(255, 255, 255, 0.08);
      height: 100%;
    }
    .compare-card.highlight {
      border-color: var(--neon-cyan);
      background: linear-gradient(180deg, rgba(0, 102, 255, 0.12) 0%, rgba(15, 23, 42, 0.9) 100%);
      box-shadow: 0 0 25px rgba(0, 240, 255, 0.15);
    }
    .compare-item {
      display: flex;
      justify-content: space-between;
      padding: 12px 0;
      border-bottom: 1px solid rgba(255, 255, 255, 0.05);
      font-size: 0.92rem;
    }
    .compare-item:last-child {
      border-bottom: none;
    }

    /* 时间线组件 */
    .timeline-wrap {
      position: relative;
      padding-left: 30px;
    }
    .timeline-wrap::before {
      content: '';
      position: absolute;
      top: 0;
      bottom: 0;
      left: 10px;
      width: 2px;
      background: rgba(0, 240, 255, 0.25);
    }
    .timeline-node {
      position: relative;
      margin-bottom: 30px;
    }
    .timeline-node::before {
      content: '';
      position: absolute;
      left: -25px;
      top: 6px;
      width: 12px;
      height: 12px;
      border-radius: 50%;
      background: var(--neon-cyan);
      box-shadow: 0 0 10px var(--neon-cyan);
    }

    /* 手风琴 FAQ */
    .accordion-item {
      background: var(--card-bg) !important;
      border: 1px solid var(--card-border) !important;
      margin-bottom: 14px;
      border-radius: 8px !important;
      overflow: hidden;
    }
    .accordion-button {
      background: transparent !important;
      color: #FFFFFF !important;
      font-weight: 600;
      box-shadow: none !important;
      padding: 18px 20px;
      font-size: 1rem;
    }
    .accordion-button:not(.collapsed) {
      color: var(--neon-cyan) !important;
      background: rgba(0, 240, 255, 0.06) !important;
    }
    .accordion-button::after {
      filter: invert(1);
    }
    .accordion-body {
      color: var(--text-muted);
      font-size: 0.92rem;
      line-height: 1.7;
      padding: 20px;
    }

    /* 表单组件 */
    .form-control-custom {
      background: rgba(10, 15, 29, 0.8);
      border: 1px solid rgba(0, 240, 255, 0.25);
      color: #fff;
      padding: 12px 16px;
      border-radius: 6px;
      font-size: 0.92rem;
    }
    .form-control-custom:focus {
      background: rgba(10, 15, 29, 0.95);
      border-color: var(--neon-cyan);
      box-shadow: 0 0 12px rgba(0, 240, 255, 0.3);
      color: #fff;
      outline: none;
    }
    .form-select-custom {
      background: rgba(10, 15, 29, 0.8);
      border: 1px solid rgba(0, 240, 255, 0.25);
      color: #fff;
      padding: 12px 16px;
      border-radius: 6px;
      font-size: 0.92rem;
    }
    .form-select-custom:focus {
      background: rgba(10, 15, 29, 0.95);
      border-color: var(--neon-cyan);
      color: #fff;
      outline: none;
    }

    /* 页脚 */
    footer {
      background: #060913;
      border-top: 1px solid rgba(255, 255, 255, 0.08);
      padding: 60px 0 30px 0;
      font-size: 0.88rem;
    }
    .footer-title {
      color: #fff;
      font-weight: 700;
      font-size: 1rem;
      margin-bottom: 20px;
      position: relative;
    }
    .footer-title::after {
      content: '';
      position: absolute;
      left: 0;
      bottom: -6px;
      width: 24px;
      height: 2px;
      background: var(--neon-cyan);
    }
    .footer-links {
      list-style: none;
      padding: 0;
    }
    .footer-links li {
      margin-bottom: 10px;
    }
    .footer-links a {
      color: var(--text-muted);
    }
    .footer-links a:hover {
      color: var(--neon-cyan);
      padding-left: 4px;
    }
    .footer-bottom {
      border-top: 1px solid rgba(255, 255, 255, 0.06);
      margin-top: 40px;
      padding-top: 20px;
      color: var(--text-sub);
      font-size: 0.82rem;
    }

    @media (max-width: 991px) {
      .hero-h1 {
        font-size: 2.2rem;
      }
      .section-title {
        font-size: 1.8rem;
      }
      .timeline-chips {
        margin: 12px 0;
        overflow-x: auto;
      }
    }
    @media (max-width: 575px) {
      .hero-h1 {
        font-size: 1.85rem;
      }
      .stat-number {
        font-size: 2.1rem;
      }
      .glass-card {
        padding: 20px;
      }
    }