/* roulang page: index */
:root {
      --brand-green: #00E599;
      --brand-green-hover: #05D585;
      --brand-black: #121417;
      --brand-card-dark: #1E2229;
      --accent-orange: #FF5722;
      --text-main: #111827;
      --text-muted: #4B5563;
      --bg-light: #F8F9FA;
      --border-color: #E5E7EB;
      --shadow-soft: 0 4px 20px -2px rgba(18, 20, 23, 0.06);
      --shadow-hover: 0 12px 28px -4px rgba(18, 20, 23, 0.12);
    }

    body {
      font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      letter-spacing: 0.02em;
      line-height: 1.75;
      color: var(--text-main);
      background-color: var(--bg-light);
      scroll-behavior: smooth;
    }

    .custom-container {
      max-width: 1280px;
      margin-left: auto;
      margin-right: auto;
      padding-left: 1.25rem;
      padding-right: 1.25rem;
    }

    .badge-neon {
      background-color: rgba(0, 229, 153, 0.12);
      color: #009e66;
      border: 1px solid rgba(0, 229, 153, 0.35);
    }

    .badge-orange {
      background-color: rgba(255, 87, 34, 0.1);
      color: var(--accent-orange);
      border: 1px solid rgba(255, 87, 34, 0.25);
    }

    .feature-card {
      transition: all 0.28s ease;
      box-shadow: var(--shadow-soft);
      border: 1px solid rgba(229, 231, 235, 0.8);
      background: #FFFFFF;
    }

    .feature-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-hover);
      border-color: rgba(0, 229, 153, 0.4);
    }

    .hero-spec-pill {
      background: rgba(255, 255, 255, 0.85);
      backdrop-filter: blur(8px);
      border: 1px solid rgba(229, 231, 235, 0.9);
    }

    .search-mock-bar {
      box-shadow: 0 16px 36px -8px rgba(0, 229, 153, 0.22);
    }

    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.35s ease, opacity 0.25s ease;
      opacity: 0;
    }

    .faq-item.active .faq-answer {
      max-height: 240px;
      opacity: 1;
    }

    .faq-item.active .faq-chevron {
      transform: rotate(180deg);
      color: var(--brand-green-hover);
    }

    @media (max-width: 768px) {
      .hero-spec-pill {
        width: 100%;
      }
    }