/* roulang page: index */
:root {
      --brand-main: #0F4C81;
      --brand-accent: #00A896;
      --brand-dark: #0A192F;
      --brand-bg: #F8FAFC;
      --brand-text: #334155;
      --brand-title: #0F172A;
      --card-shadow: 0 10px 30px -5px rgba(15, 76, 129, 0.08);
      --card-shadow-hover: 0 20px 35px -5px rgba(15, 76, 129, 0.16);
    }
    body {
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", "PingFang SC", "Noto Sans", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      color: var(--brand-text);
      background-color: var(--brand-bg);
      overflow-x: hidden;
    }
    .custom-gradient-bg {
      background: linear-gradient(135deg, #0F4C81 0%, #00A896 100%);
    }
    .custom-dark-bg {
      background: radial-gradient(circle at 80% 20%, #173459 0%, #0A192F 100%);
    }
    .card-elevated {
      box-shadow: var(--card-shadow);
      transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
    }
    .card-elevated:hover {
      box-shadow: var(--card-shadow-hover);
      transform: translateY(-4px);
    }
    .badge-pill {
      background: rgba(0, 168, 150, 0.08);
      color: #007f71;
      border: 1px solid rgba(0, 168, 150, 0.25);
    }
    details summary::-webkit-details-marker {
      display: none;
    }