/* roulang page: index */
:root {
      --electric-purple: #7B2FF7;
      --neon-cyan: #00F0FF;
      --deep-space: #0A0E1A;
      --victory-gold: #FFB800;
      --text-muted: #B0B8C5;
      --label-gray: #8A8F9D;
      --border-glow: rgba(0,240,255,0.15);
      --card-bg: rgba(255,255,255,0.03);
    }
    * {
      box-sizing: border-box;
    }
    body {
      margin: 0;
      font-family: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', sans-serif;
      background-color: var(--deep-space);
      color: #ffffff;
      line-height: 1.6;
      -webkit-font-smoothing: antialiased;
    }
    .container {
      max-width: 1280px;
      margin-left: auto;
      margin-right: auto;
      padding-left: 20px;
      padding-right: 20px;
    }
    @media (max-width: 480px) {
      .container {
        padding-left: 16px;
        padding-right: 16px;
      }
    }
    /* 导航样式 */
    .nav-blur {
      background: rgba(10, 14, 26, 0.85);
      backdrop-filter: blur(16px);
      border-bottom: 1px solid rgba(0,240,255,0.30);
    }
    .nav-link {
      color: #B0B8C5;
      transition: color 0.25s ease;
      font-weight: 500;
    }
    .nav-link:hover {
      color: var(--neon-cyan);
    }
    .btn-primary {
      background: linear-gradient(135deg, #7B2FF7 0%, #5A1FD6 100%);
      color: white;
      border-radius: 12px;
      padding: 12px 28px;
      font-weight: 600;
      transition: all 0.25s ease;
      box-shadow: 0 4px 14px rgba(123,47,247,0.4);
      border: none;
      cursor: pointer;
      display: inline-flex;
      align-items: center;
      justify-content: center;
    }
    .btn-primary:hover {
      filter: brightness(1.15);
      box-shadow: 0 0 20px rgba(123,47,247,0.6);
      transform: scale(1.03);
    }
    .btn-outline {
      background: transparent;
      border: 1px solid var(--neon-cyan);
      color: var(--neon-cyan);
      border-radius: 12px;
      padding: 12px 28px;
      font-weight: 600;
      transition: all 0.25s ease;
    }
    .btn-outline:hover {
      background: rgba(0,240,255,0.08);
      border-color: #ffffff;
      color: #ffffff;
      box-shadow: 0 0 14px rgba(0,240,255,0.3);
    }
    .btn-ghost {
      background: transparent;
      border: 1px solid rgba(255,255,255,0.5);
      color: white;
      border-radius: 12px;
      padding: 12px 28px;
      font-weight: 600;
      transition: all 0.25s ease;
    }
    .btn-ghost:hover {
      background: rgba(255,255,255,0.05);
      border-color: white;
    }
    /* 卡片样式 */
    .card {
      background: rgba(255,255,255,0.03);
      backdrop-filter: blur(4px);
      border: 1px solid rgba(0,240,255,0.15);
      border-radius: 16px;
      padding: 32px;
      transition: all 0.3s ease;
    }
    .card:hover {
      border-color: var(--neon-cyan);
      box-shadow: 0 8px 32px rgba(0,240,255,0.18);
      transform: translateY(-4px);
    }
    @media (max-width: 768px) {
      .card {
        padding: 24px;
      }
    }
    .badge-gold {
      background-color: var(--victory-gold);
      color: #0A0E1A;
      font-weight: 700;
      font-size: 0.8rem;
      padding: 4px 12px;
      border-radius: 20px;
      letter-spacing: 0.3px;
    }
    .text-gradient {
      background: linear-gradient(135deg, #7B2FF7 0%, #00F0FF 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
    }
    .hero-bg {
      background: radial-gradient(circle at 30% 40%, rgba(123,47,247,0.18) 0%, rgba(10,14,26,0.98) 80%);
      position: relative;
    }
    .hero-bg::before {
      content: "";
      position: absolute;
      top:0; left:0; right:0; bottom:0;
      background-image: url('/assets/images/backpic/back-1.webp');
      background-size: cover;
      background-position: center;
      opacity: 0.25;
      z-index: 0;
    }
    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.4s ease, padding 0.3s ease;
    }
    .faq-item.open .faq-answer {
      max-height: 200px;
      padding-top: 12px;
      padding-bottom: 8px;
    }
    .faq-item.open .faq-icon {
      transform: rotate(45deg);
    }
    /* 移动端菜单 */
    @media (max-width: 768px) {
      .mobile-menu {
        display: none;
      }
      .mobile-menu.open {
        display: flex;
        flex-direction: column;
        position: absolute;
        top: 70px;
        left: 0;
        right: 0;
        background: rgba(10,14,26,0.98);
        backdrop-filter: blur(20px);
        padding: 20px;
        border-bottom: 1px solid var(--neon-cyan);
        z-index: 50;
      }
    }