/* roulang page: index */
:root {
      --primary: #1A56DB;
      --primary-hover: #1546AF;
      --secondary: #00A3BF;
      --dark-navy: #0B1528;
      --bg-light: #F8FAFC;
      --text-main: #1E293B;
      --text-muted: #64748B;
      --border-color: #EEF2F6;
    }
    body {
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      color: var(--text-main);
      background-color: #FFFFFF;
      overflow-x: hidden;
    }
    .custom-card-shadow {
      box-shadow: 0 4px 20px -2px rgba(15, 23, 42, 0.05);
      transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    }
    .custom-card-shadow:hover {
      box-shadow: 0 20px 30px -10px rgba(26, 86, 219, 0.12);
      transform: translateY(-4px);
    }
    details summary::-webkit-details-marker {
      display: none;
    }
    details[open] summary svg {
      transform: rotate(180deg);
    }