/* roulang page: index */
:root {
      --primary: #0F4C3A;
      --primary-dark: #0A3427;
      --accent: #10B981;
      --accent-bright: #34D399;
      --bg-base: #F8FAFC;
      --text-main: #334155;
      --text-muted: #64748B;
      --border-line: #E2E8F0;
      --radius-card: 12px;
      --radius-btn: 8px;
    }
    body {
      font-family: var(--font-sans);
      color: var(--text-main);
      background-color: #ffffff;
      line-height: 1.75;
      overflow-x: hidden;
    }
    .custom-shadow {
      box-shadow: 0 4px 20px -2px rgba(15, 76, 58, 0.06), 0 2px 6px -1px rgba(0, 0, 0, 0.04);
    }
    .custom-shadow-hover:hover {
      box-shadow: 0 16px 32px -4px rgba(15, 76, 58, 0.12), 0 6px 12px -2px rgba(0, 0, 0, 0.06);
      transform: translateY(-4px);
    }
    .hero-mask {
      background: linear-gradient(135deg, rgba(10, 52, 39, 0.95) 0%, rgba(15, 76, 58, 0.88) 60%, rgba(17, 24, 39, 0.96) 100%);
    }
    .faq-open .faq-icon {
      transform: rotate(180deg);
    }
    .faq-open .faq-answer {
      max-height: 240px;
      opacity: 1;
      margin-top: 1rem;
    }