/* roulang page: index */
:root {
      --primary: #05c168;
      --accent: #fa5a2a;
      --bg-dark: #0f172a;
      --text-main: #0f172a;
      --text-muted: #475569;
      --border-color: #e2e8f0;
      --radius-box: 16px;
      --shadow-soft: 0 10px 30px -5px rgba(15, 23, 42, 0.08);
    }
    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }
    body {
      font-family: system-ui, -apple-system, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      color: var(--text-main);
      background-color: #ffffff;
      line-height: 1.65;
      -webkit-font-smoothing: antialiased;
    }
    .custom-container {
      width: 100%;
      max-width: 1240px;
      margin-left: auto;
      margin-right: auto;
      padding-left: 1.25rem;
      padding-right: 1.25rem;
    }
    .section-spacing {
      padding-top: 5rem;
      padding-bottom: 5rem;
    }
    .card-elevated {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-box);
      box-shadow: var(--shadow-soft);
      transition: all 0.25s ease-in-out;
    }
    .card-elevated:hover {
      transform: translateY(-4px);
      box-shadow: 0 18px 36px -8px rgba(15, 23, 42, 0.12);
      border-color: rgba(5, 193, 104, 0.35);
    }
    .faq-panel {
      transition: max-height 0.3s cubic-bezier(0, 1, 0, 1);
    }