/* roulang page: index */
:root {
      --primary-lemon: #C5F500;
      --secondary-cyan: #00E5FF;
      --accent-orange: #FF6B35;
      --bg-deep: #0A0E1A;
      --bg-card: rgba(255, 255, 255, 0.03);
      --border-subtle: rgba(197, 245, 0, 0.15);
      --text-primary: #F0F2F5;
      --text-secondary: #9CA3AF;
      --radius-card: 16px;
      --radius-btn: 24px;
      --glass-blur: blur(20px);
      --shadow-glow: 0 0 24px #C5F500;
    }

    * {
      box-sizing: border-box;
    }

    body {
      margin: 0;
      font-family: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', sans-serif;
      background-color: var(--bg-deep);
      color: var(--text-primary);
      line-height: 1.6;
      -webkit-font-smoothing: antialiased;
    }

    .glass-card {
      background: rgba(255, 255, 255, 0.03);
      backdrop-filter: blur(20px);
      -webkit-backdrop-filter: blur(20px);
      border: 1px solid var(--border-subtle);
      border-radius: var(--radius-card);
      box-shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
      transition: all 0.25s ease;
    }

    .glass-card:hover {
      border-color: rgba(197, 245, 0, 0.5);
      box-shadow: 0 12px 36px rgba(0, 0, 0, 0.6);
      transform: translateY(-4px);
    }

    .btn-glow {
      background: var(--primary-lemon);
      color: #0A0E1A;
      font-weight: 700;
      border-radius: 30px;
      padding: 0.75rem 2rem;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 0.5rem;
      border: none;
      cursor: pointer;
      transition: all 0.3s ease;
      box-shadow: 0 0 12px rgba(197, 245, 0, 0.5);
      text-decoration: none;
      letter-spacing: 0.5px;
    }

    .btn-glow:hover {
      box-shadow: 0 0 24px #C5F500, 0 8px 20px rgba(0,0,0,0.5);
      transform: scale(1.03);
      background: #d4ff1a;
    }

    .btn-ghost {
      background: transparent;
      border: 1px solid rgba(197, 245, 0, 0.6);
      color: var(--primary-lemon);
      font-weight: 600;
      border-radius: 30px;
      padding: 0.75rem 2rem;
      display: inline-flex;
      align-items: center;
      gap: 0.5rem;
      transition: all 0.3s ease;
      backdrop-filter: blur(8px);
      text-decoration: none;
    }

    .btn-ghost:hover {
      border-color: var(--secondary-cyan);
      color: var(--secondary-cyan);
      background: rgba(0, 229, 255, 0.05);
      box-shadow: 0 0 16px rgba(0, 229, 255, 0.3);
    }

    .container-custom {
      max-width: 1280px;
      margin: 0 auto;
      padding: 0 24px;
    }

    h1, h2, h3, h4 {
      font-weight: 700;
      line-height: 1.3;
      letter-spacing: -0.02em;
    }

    .section-padding {
      padding: 80px 0;
    }

    @media (max-width: 768px) {
      .section-padding {
        padding: 48px 0;
      }
      h1 {
        font-size: 2.4rem !important;
      }
      h2 {
        font-size: 2rem !important;
      }
    }

    .nav-search-input {
      background: rgba(255,255,255,0.05);
      border: 1px solid rgba(197,245,0,0.2);
      border-radius: 24px;
      color: white;
      padding: 0.6rem 1rem 0.6rem 2.8rem;
      width: 320px;
      transition: all 0.3s;
    }
    .nav-search-input:focus {
      outline: none;
      border-color: var(--secondary-cyan);
      box-shadow: 0 0 12px rgba(0,229,255,0.3);
    }
    @media (max-width: 768px) {
      .nav-search-input {
        width: 100%;
      }
    }

    .faq-item {
      border-bottom: 1px solid rgba(255,255,255,0.1);
      padding: 1rem 0;
    }
    .faq-question {
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      font-weight: 600;
      font-size: 1.2rem;
    }
    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.4s ease, padding 0.4s;
      color: #9CA3AF;
    }
    .faq-item.active .faq-answer {
      max-height: 200px;
      padding: 0.8rem 0;
    }
    .faq-icon {
      color: var(--primary-lemon);
      font-size: 1.5rem;
      transition: transform 0.3s;
    }
    .faq-item.active .faq-icon {
      transform: rotate(45deg);
      color: var(--secondary-cyan);
    }