/* roulang page: index */
:root {
      --primary-start: #0B57D0;
      --primary-end: #00A3FF;
      --accent: #F59E0B;
      --bg-light: #F8FAFC;
      --bg-alt: #EEF2F6;
      --text-main: #0F172A;
      --text-muted: #475569;
    }
    html {
      scroll-behavior: smooth;
    }
    body {
      color: var(--text-main);
      background-color: var(--bg-light);
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
      overflow-x: hidden;
    }
    .brand-gradient {
      background: linear-gradient(135deg, #0B57D0 0%, #00A3FF 100%);
    }
    .brand-gradient-text {
      background: linear-gradient(135deg, #0B57D0 0%, #00A3FF 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }
    .card-shadow {
      box-shadow: 0 10px 30px -5px rgba(11, 87, 208, 0.08);
    }
    .card-shadow-hover:hover {
      box-shadow: 0 20px 35px -5px rgba(11, 87, 208, 0.16);
      transform: translateY(-3px);
    }
    .faq-answer {
      transition: max-height 0.3s cubic-bezier(0, 1, 0, 1);
    }