/* roulang page: index */
:root {
      --primary: #0052FF;
      --primary-hover: #1A73E8;
      --accent-green: #00E676;
      --accent-orange: #FF6D00;
      --bg-dark: #0B0E14;
      --bg-card-dark: #121824;
      --text-dark: #0F172A;
      --text-muted: #64748B;
      --border-gradient: linear-gradient(135deg, rgba(0, 82, 255, 0.25), rgba(0, 230, 118, 0.25));
    }
    
    html {
      scroll-behavior: smooth;
      font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
    }

    body {
      background-color: #F8FAFC;
      color: #1E293B;
      overflow-x: hidden;
      line-height: 1.65;
    }

    .glass-nav {
      background: rgba(255, 255, 255, 0.88);
      backdrop-filter: blur(16px);
      -webkit-backdrop-filter: blur(16px);
      border-bottom: 1px solid rgba(226, 232, 240, 0.8);
    }

    .badge-pulse {
      display: inline-flex;
      align-items: center;
      padding: 0.25rem 0.75rem;
      border-radius: 9999px;
      font-size: 0.75rem;
      font-weight: 600;
      background: rgba(0, 82, 255, 0.08);
      color: var(--primary);
      border: 1px solid rgba(0, 82, 255, 0.15);
    }
    
    .badge-dot {
      width: 6px;
      height: 6px;
      border-radius: 50%;
      background-color: var(--accent-green);
      margin-right: 6px;
      box-shadow: 0 0 8px var(--accent-green);
    }

    .card-rounded {
      border-radius: 20px;
      transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
      border: 1px solid #E2E8F0;
      background: #FFFFFF;
    }
    .card-rounded:hover {
      transform: translateY(-4px);
      box-shadow: 0 16px 32px -8px rgba(0, 82, 255, 0.12);
      border-color: rgba(0, 82, 255, 0.3);
    }

    .btn-gradient {
      background: linear-gradient(135deg, #0052FF 0%, #1A73E8 100%);
      color: #FFFFFF;
      transition: all 0.25s ease;
      box-shadow: 0 4px 14px rgba(0, 82, 255, 0.35);
    }
    .btn-gradient:hover {
      background: linear-gradient(135deg, #0045D8 0%, #1562C6 100%);
      transform: translateY(-1px);
      box-shadow: 0 6px 20px rgba(0, 82, 255, 0.45);
    }

    .accordion-header {
      cursor: pointer;
      user-select: none;
    }
    .accordion-content {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.35s ease-out, padding 0.35s ease;
    }
    .accordion-content.active {
      max-height: 280px;
      padding-top: 1rem;
    }
    .rotate-arrow {
      transition: transform 0.3s ease;
    }
    .rotate-arrow.active {
      transform: rotate(180deg);
    }