/* roulang page: index */
:root {
      --bg-dark: #070b14;
      --bg-surface: #0d1527;
      --primary: #00d2ff;
      --primary-hover: #00b4dc;
      --accent-green: #00f5a0;
      --accent-purple: #7952ff;
      --text-main: #f8fafc;
      --text-muted: #94a3b8;
      --border-glass: rgba(255, 255, 255, 0.08);
      --glass-card: rgba(15, 23, 42, 0.65);
    }

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

    body {
      background-color: var(--bg-dark);
      color: var(--text-main);
      font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      line-height: 1.65;
      overflow-x: hidden;
    }

    /* 玻璃拟态容器 */
    .glass-box {
      background: var(--glass-card);
      backdrop-filter: blur(16px);
      -webkit-backdrop-filter: blur(16px);
      border: 1px solid var(--border-glass);
      border-radius: 16px;
      transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
    }
    .glass-box:hover {
      border-color: rgba(0, 210, 255, 0.3);
      box-shadow: 0 12px 35px -10px rgba(0, 210, 255, 0.2);
      transform: translateY(-2px);
    }

    /* 发光主按钮 */
    .btn-glow {
      background: linear-gradient(135deg, #00d2ff 0%, #0072ff 100%);
      color: #ffffff;
      box-shadow: 0 0 20px rgba(0, 210, 255, 0.35);
      border-radius: 9999px;
      font-weight: 600;
      transition: all 0.3s ease;
      display: inline-flex;
      align-items: center;
      justify-content: center;
    }
    .btn-glow:hover {
      box-shadow: 0 0 30px rgba(0, 210, 255, 0.6);
      transform: translateY(-2px);
      color: #ffffff;
    }

    .btn-outline {
      border: 1px solid rgba(0, 210, 255, 0.5);
      color: #00d2ff;
      border-radius: 9999px;
      font-weight: 600;
      transition: all 0.3s ease;
      background: rgba(0, 210, 255, 0.04);
      display: inline-flex;
      align-items: center;
      justify-content: center;
    }
    .btn-outline:hover {
      background: rgba(0, 210, 255, 0.15);
      border-color: #00d2ff;
      color: #ffffff;
      box-shadow: 0 0 15px rgba(0, 210, 255, 0.25);
    }

    /* 进度环图形 */
    .progress-ring__circle {
      transition: stroke-dashoffset 0.35s;
      transform: rotate(-90deg);
      transform-origin: 50% 50%;
    }

    /* 板块交替与布局底色 */
    .section-spacing {
      padding-top: 5rem;
      padding-bottom: 5rem;
      position: relative;
    }
    @media (min-width: 1024px) {
      .section-spacing {
        padding-top: 6.5rem;
        padding-bottom: 6.5rem;
      }
    }