/* roulang page: index */
:root {
      --primary: #0052d9;
      --primary-hover: #165dff;
      --accent: #00b578;
      --bg-light: #f7f9fc;
      --text-main: #0f172a;
      --text-muted: #475569;
      --border-color: #e2e8f0;
      --card-shadow: 0 4px 20px -2px rgba(15, 23, 42, 0.05);
      --card-shadow-hover: 0 16px 32px -4px rgba(0, 82, 217, 0.12);
    }
    body {
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      color: var(--text-main);
      background-color: var(--bg-light);
      -webkit-font-smoothing: antialiased;
    }
    .custom-card {
      background: #ffffff;
      border: 1px solid rgba(226, 232, 240, 0.8);
      box-shadow: var(--card-shadow);
      transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    }
    .custom-card:hover {
      box-shadow: var(--card-shadow-hover);
      transform: translateY(-3px);
      border-color: rgba(0, 82, 217, 0.3);
    }
    .deep-tech-bg {
      background: radial-gradient(circle at 80% 20%, #15274d 0%, #0a1224 100%);
    }
    .glass-pill {
      background: rgba(255, 255, 255, 0.08);
      backdrop-filter: blur(8px);
      border: 1px solid rgba(255, 255, 255, 0.15);
    }
    .accordion-content {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.35s ease-out;
    }
    .accordion-item.active .accordion-content {
      max-height: 280px;
    }
    .accordion-item.active .accordion-icon {
      transform: rotate(180deg);
    }