/* roulang page: index */
:root {
      --primary: #FF5A1F;
      --primary-hover: #E04810;
      --secondary: #0EA5E9;
      --dark: #0F172A;
      --dark-card: #1E293B;
      --bg-light: #F8FAFC;
      --text-main: #1E293B;
      --text-muted: #64748B;
      --border-color: #E2E8F0;
    }
    * {
      box-sizing: border-box;
      scroll-behavior: smooth;
    }
    body {
      font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      color: var(--text-main);
      background-color: #ffffff;
      line-height: 1.75;
      overflow-x: hidden;
    }
    .custom-container {
      max-width: 1200px;
      margin-left: auto;
      margin-right: auto;
      padding-left: 1rem;
      padding-right: 1rem;
    }
    @media (min-width: 640px) {
      .custom-container { padding-left: 1.5rem; padding-right: 1.5rem; }
    }
    @media (min-width: 1024px) {
      .custom-container { padding-left: 2rem; padding-right: 2rem; }
    }
    .hero-glow {
      background: radial-gradient(circle at 50% 20%, rgba(255, 90, 31, 0.22) 0%, rgba(15, 23, 42, 0.98) 75%);
    }
    .card-transition {
      transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    }
    .card-transition:hover {
      transform: translateY(-4px);
      box-shadow: 0 16px 30px -10px rgba(15, 23, 42, 0.1);
    }
    .faq-content {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.35s ease-out;
    }
    .faq-active .faq-content {
      max-height: 350px;
    }
    .faq-active .faq-icon {
      transform: rotate(180deg);
    }