/* roulang page: index */
:root {
      --primary-deep: #0A0E27;
      --accent-purple: #7C3AED;
      --highlight-gold: #E8A87C;
      --glass-bg: rgba(15, 23, 42, 0.7);
      --text-primary: #FFFFFF;
      --text-secondary: #B0C4DE;
      --text-muted: #6B7FA3;
      --border-purple: rgba(124, 58, 237, 0.3);
      --shadow-card: 0 4px 24px rgba(0,0,0,0.4);
      --shadow-hover: 0 8px 40px rgba(124,58,237,0.25);
      --radius-lg: 16px;
      --radius-md: 12px;
      --radius-sm: 8px;
      --radius-full: 9999px;
    }
    * {
      box-sizing: border-box;
    }
    body {
      font-family: -apple-system, "PingFang SC", "Microsoft YaHei", "Helvetica Neue", sans-serif;
      background-color: var(--primary-deep);
      color: var(--text-secondary);
      line-height: 1.6;
      margin: 0;
      -webkit-font-smoothing: antialiased;
      background-image: radial-gradient(circle at 20% 10%, rgba(124,58,237,0.08) 0%, transparent 35%);
      background-attachment: fixed;
    }
    .glass-card {
      background: var(--glass-bg);
      backdrop-filter: blur(16px);
      -webkit-backdrop-filter: blur(16px);
      border: 1px solid var(--border-purple);
      border-radius: var(--radius-lg);
      box-shadow: var(--shadow-card);
    }
    .glass-card-sm {
      background: rgba(15, 23, 42, 0.6);
      backdrop-filter: blur(12px);
      -webkit-backdrop-filter: blur(12px);
      border: 1px solid rgba(124,58,237,0.25);
      border-radius: var(--radius-md);
    }
    .glow-button {
      background-color: var(--highlight-gold);
      color: #0A0E27;
      font-weight: 600;
      border-radius: var(--radius-full);
      padding: 0.75rem 2rem;
      box-shadow: 0 0 20px rgba(232,168,124,0.5);
      transition: all 0.3s ease;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      border: none;
      cursor: pointer;
      letter-spacing: 0.5px;
    }
    .glow-button:hover {
      box-shadow: 0 0 30px rgba(232,168,124,0.7);
      transform: translateY(-2px);
      background-color: #f0b88c;
    }
    .glow-button-sm {
      padding: 0.5rem 1.5rem;
      font-size: 0.9rem;
    }
    .text-highlight {
      color: var(--highlight-gold);
    }
    .border-purple-glow {
      border-color: rgba(124,58,237,0.5);
    }
    .accent-purple-text {
      color: var(--accent-purple);
    }
    .section-spacing {
      padding-top: 5rem;
      padding-bottom: 5rem;
    }
    @media (max-width: 768px) {
      .section-spacing {
        padding-top: 3rem;
        padding-bottom: 3rem;
      }
    }
    .hero-bg-slide {
      position: absolute;
      top: 0;
      left: 0;
      width: 100%;
      height: 100%;
      background-size: cover;
      background-position: center;
      opacity: 0;
      transition: opacity 1.5s ease-in-out;
    }
    .hero-bg-slide.active {
      opacity: 1;
    }
    .nav-icon {
      transition: color 0.2s, transform 0.2s;
    }
    .nav-item:hover .nav-icon {
      color: white;
      transform: translateY(-2px);
    }
    .nav-item:hover span {
      color: white;
    }
    .faq-item {
      cursor: pointer;
      transition: border-color 0.25s;
    }
    .faq-item.active {
      border-color: rgba(124,58,237,0.7);
      box-shadow: 0 0 18px rgba(124,58,237,0.25);
    }
    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s ease, padding 0.3s ease;
    }
    .faq-item.active .faq-answer {
      max-height: 200px;
      padding: 1rem 0 0.5rem;
    }
    .faq-toggle-icon {
      transition: transform 0.3s;
    }
    .faq-item.active .faq-toggle-icon {
      transform: rotate(45deg);
    }
    .case-scroll {
      scroll-snap-type: x mandatory;
      -webkit-overflow-scrolling: touch;
      scrollbar-width: thin;
      scrollbar-color: var(--accent-purple) var(--primary-deep);
    }
    .case-scroll::-webkit-scrollbar {
      height: 6px;
    }
    .case-scroll::-webkit-scrollbar-thumb {
      background: var(--accent-purple);
      border-radius: 10px;
    }
    .case-card {
      scroll-snap-align: start;
    }
    @media (max-width: 1023px) {
      .mobile-bottom-nav {
        display: flex;
      }
    }
    .mobile-bottom-nav {
      background: rgba(10,14,39,0.9);
      backdrop-filter: blur(20px);
      border-top: 1px solid rgba(124,58,237,0.4);
    }