/* roulang page: index */
:root {
      --primary: #0F2B5C;
      --accent: #4364F7;
      --bg-light: #F8FAFC;
      --text-main: #0F172A;
      --text-muted: #475569;
    }
    body {
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", "PingFang SC", "Noto Sans", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      color: var(--text-main);
      background-color: var(--bg-light);
      overflow-x: hidden;
    }
    .custom-gradient-text {
      background: linear-gradient(135deg, #0F2B5C 0%, #0052D4 50%, #4364F7 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }
    .custom-gradient-bg {
      background: linear-gradient(135deg, #0052D4 0%, #4364F7 50%, #6FB1FC 100%);
    }
    .hero-bg-overlay {
      background: linear-gradient(180deg, rgba(15, 43, 92, 0.88) 0%, rgba(11, 19, 43, 0.94) 100%);
    }
    .card-transition {
      transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    }
    .card-transition:hover {
      transform: translateY(-4px);
    }
    /* Accordion styles */
    details summary::-webkit-details-marker {
      display: none;
    }
    details[open] summary svg {
      transform: rotate(180deg);
    }
    input:focus-visible, button:focus-visible, a:focus-visible {
      outline: 2px solid #4364F7;
      outline-offset: 2px;
    }