/* roulang page: index */
:root {
      --color-primary: #0D9488;
      --color-cyan: #06B6D4;
      --color-dark: #0F172A;
      --color-panel: #0B1120;
      --color-accent: #F59E0B;
      --color-text-main: #334155;
      --color-border: #E2E8F0;
      --radius-base: 6px;
    }
    body {
      font-family: Inter, -apple-system, BlinkMacSystemFont, "PingFang SC", "Segoe UI", Roboto, "Microsoft YaHei", sans-serif;
      color: var(--color-text-main);
      background-color: #FFFFFF;
      overflow-x: hidden;
      line-height: 1.75;
      letter-spacing: -0.01em;
    }
    .hero-banner-bg {
      background-image: linear-gradient(to right, rgba(15, 23, 42, 0.95), rgba(11, 17, 32, 0.88)), url('/assets/images/51fb8bff541aea8b.webp');
      background-size: cover;
      background-position: center;
    }
    .custom-card {
      border: 1px solid #E2E8F0;
      border-radius: var(--radius-base);
      transition: all 0.2s ease-in-out;
    }
    .custom-card:hover {
      transform: translateY(-3px);
      box-shadow: 0 10px 25px -5px rgba(15, 23, 42, 0.08);
      border-color: #CBD5E1;
    }
    .faq-content {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s ease-out;
    }
    .faq-open .faq-content {
      max-height: 240px;
    }
    .faq-open .faq-chevron {
      transform: rotate(180deg);
    }