/* roulang page: index */
:root {
      --primary: #0A58CA;
      --primary-dark: #074299;
      --accent: #00A3FF;
      --bg-slate: #F8FAFC;
      --navy-deep: #0A1128;
      --text-main: #0F172A;
      --text-muted: #475569;
      --border-subtle: #E2E8F0;
    }
    html {
      scroll-behavior: smooth;
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
    }
    .custom-card-shadow {
      box-shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.05), 0 1px 2px 0 rgba(0, 0, 0, 0.03);
      transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
    }
    .custom-card-shadow:hover {
      box-shadow: 0 10px 25px -5px rgba(10, 88, 202, 0.08), 0 8px 10px -6px rgba(10, 88, 202, 0.04);
      transform: translateY(-4px);
    }
    .partner-logo-grayscale {
      filter: grayscale(100%);
      opacity: 0.65;
      transition: all 0.3s ease;
    }
    .partner-logo-grayscale:hover {
      filter: grayscale(0%);
      opacity: 1;
    }
    details summary::-webkit-details-marker {
      display: none;
    }
    details[open] summary svg {
      transform: rotate(180deg);
    }