/* roulang page: index */
:root {
      --deep-blue: #0B0E14;
      --dark-bg: #141A24;
      --champion-gold: #D4AF37;
      --electric-cyan: #00F0FF;
      --card-bg: rgba(26, 31, 43, 0.6);
      --border-gold: rgba(212, 175, 55, 0.2);
      --text-light: #E8ECF1;
      --text-muted: #a0a8b4;
      --white: #FFFFFF;
      --glass-blur: blur(12px);
      --border-radius-card: 16px;
      --border-radius-btn: 8px;
      --shadow-glow: 0 8px 32px rgba(0, 240, 255, 0.08);
      --font-heading: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", sans-serif;
    }
    
    * {
      box-sizing: border-box;
    }
    
    body {
      font-family: var(--font-heading);
      background: linear-gradient(135deg, var(--deep-blue) 0%, var(--dark-bg) 100%);
      color: var(--text-light);
      line-height: 1.8;
      margin: 0;
      padding: 0;
      overflow-x: hidden;
    }
    
    a {
      color: var(--electric-cyan);
      text-decoration: none;
      transition: color 0.2s;
    }
    a:hover {
      color: var(--champion-gold);
    }
    
    img {
      max-width: 100%;
      height: auto;
      display: block;
    }
    
    /* 自定义容器微调 */
    .container-custom {
      max-width: 1320px;
      margin: 0 auto;
      padding-left: 1.5rem;
      padding-right: 1.5rem;
    }
    
    /* 导航 sticky 与玻璃拟态 */
    .navbar {
      background: rgba(11, 14, 20, 0.8);
      backdrop-filter: blur(20px);
      border-bottom: 1px solid rgba(212, 175, 55, 0.15);
      transition: background 0.3s, box-shadow 0.3s;
      padding: 0.8rem 0;
    }
    .navbar.sticky-active {
      background: rgba(8, 10, 15, 0.95);
      box-shadow: 0 4px 20px rgba(0, 240, 255, 0.08);
    }
    .navbar-brand {
      font-weight: 700;
      font-size: 1.8rem;
      letter-spacing: 2px;
      color: var(--champion-gold) !important;
      display: flex;
      align-items: center;
      gap: 0.5rem;
    }
    .navbar-brand i {
      font-size: 2rem;
      color: var(--electric-cyan);
    }
    .nav-link {
      color: var(--text-light) !important;
      font-weight: 500;
      margin: 0 0.5rem;
      position: relative;
      transition: 0.2s;
    }
    .nav-link:hover,
    .nav-link.active {
      color: var(--champion-gold) !important;
    }
    .nav-link::after {
      content: '';
      position: absolute;
      bottom: -4px;
      left: 0;
      width: 0;
      height: 2px;
      background: var(--champion-gold);
      transition: width 0.3s;
    }
    .nav-link:hover::after,
    .nav-link.active::after {
      width: 100%;
    }
    .navbar-toggler {
      border-color: var(--champion-gold);
      color: var(--champion-gold);
    }
    .navbar-toggler-icon {
      background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 30 30'%3e%3cpath stroke='rgba(212, 175, 55, 0.8)' stroke-linecap='round' stroke-miterlimit='10' stroke-width='2' d='M4 7h22M4 15h22M4 23h22'/%3e%3c/svg%3e");
    }
    .btn-gold {
      background: linear-gradient(135deg, #D4AF37 0%, #b8942e 100%);
      border: none;
      color: #0B0E14;
      font-weight: 700;
      padding: 0.6rem 2rem;
      border-radius: var(--border-radius-btn);
      box-shadow: 0 0 15px rgba(0, 240, 255, 0.3);
      transition: all 0.3s;
      letter-spacing: 0.5px;
    }
    .btn-gold:hover {
      background: linear-gradient(135deg, #e6c34a 0%, #c9a73c 100%);
      box-shadow: 0 0 25px rgba(0, 240, 255, 0.6);
      color: #000;
      transform: translateY(-2px);
    }
    .status-badge {
      background: rgba(0, 240, 255, 0.15);
      border: 1px solid var(--electric-cyan);
      color: var(--electric-cyan);
      padding: 0.25rem 0.8rem;
      border-radius: 20px;
      font-size: 0.8rem;
      font-weight: 600;
      margin-left: 0.5rem;
      white-space: nowrap;
    }
    
    /* Hero */
    #hero {
      background-image: url('/assets/images/backpic/back-1.webp');
      background-size: cover;
      background-position: center;
      position: relative;
      min-height: 90vh;
      display: flex;
      align-items: center;
    }
    #hero::before {
      content: '';
      position: absolute;
      top: 0; left: 0; right: 0; bottom: 0;
      background: rgba(11, 14, 20, 0.75);
      backdrop-filter: blur(2px);
    }
    .hero-content {
      position: relative;
      z-index: 2;
    }
    h1 {
      font-size: 3.5rem;
      font-weight: 700;
      color: var(--white);
      line-height: 1.3;
    }
    .highlight {
      color: var(--champion-gold);
    }
    .hero-stats {
      display: flex;
      gap: 2rem;
      margin-top: 2.5rem;
      flex-wrap: wrap;
    }
    .stat-item h3 {
      font-size: 2.2rem;
      font-weight: 700;
      color: var(--champion-gold);
    }
    
    /* 玻璃拟态卡片 */
    .glass-card {
      background: var(--card-bg);
      backdrop-filter: var(--glass-blur);
      border: 1px solid var(--border-gold);
      border-radius: var(--border-radius-card);
      box-shadow: var(--shadow-glow);
      transition: all 0.3s ease;
    }
    .glass-card:hover {
      transform: translateY(-6px);
      box-shadow: 0 16px 40px rgba(0, 240, 255, 0.15);
      border-color: rgba(212, 175, 55, 0.5);
      background: rgba(30, 36, 50, 0.7);
    }
    
    .section-title {
      font-size: 2.5rem;
      font-weight: 700;
      color: var(--white);
      margin-bottom: 1rem;
      position: relative;
      display: inline-block;
    }
    .section-title::after {
      content: '';
      position: absolute;
      bottom: -8px;
      left: 0;
      width: 60px;
      height: 3px;
      background: var(--champion-gold);
    }
    
    .icon-cyan {
      color: var(--electric-cyan);
      font-size: 2.2rem;
    }
    .text-gold {
      color: var(--champion-gold);
    }
    
    /* 服务卡片标签 */
    .service-tag {
      position: absolute;
      top: 12px;
      right: 12px;
      background: var(--electric-cyan);
      color: #000;
      font-size: 0.75rem;
      font-weight: 700;
      padding: 0.2rem 0.8rem;
      border-radius: 20px;
    }
    
    /* 横向滚动案例 */
    .case-scroll {
      display: flex;
      gap: 1.5rem;
      overflow-x: auto;
      padding-bottom: 1rem;
      scrollbar-width: thin;
      scrollbar-color: var(--champion-gold) var(--dark-bg);
    }
    .case-scroll::-webkit-scrollbar {
      height: 6px;
    }
    .case-scroll::-webkit-scrollbar-thumb {
      background: var(--champion-gold);
      border-radius: 6px;
    }
    .case-card {
      min-width: 280px;
      max-width: 320px;
      flex: 0 0 auto;
    }
    
    /* FAQ 手风琴定制 */
    .accordion-button {
      background: rgba(26, 31, 43, 0.7);
      color: var(--text-light);
      font-weight: 600;
      border: 1px solid var(--border-gold);
      border-radius: 12px !important;
      margin-bottom: 8px;
      transition: 0.3s;
    }
    .accordion-button:not(.collapsed) {
      background: rgba(0, 240, 255, 0.1);
      color: var(--champion-gold);
      box-shadow: 0 0 15px rgba(0,240,255,0.3);
      border-color: var(--champion-gold);
    }
    .accordion-body {
      background: rgba(20, 24, 34, 0.8);
      border-radius: 0 0 12px 12px;
      color: var(--text-light);
    }
    
    /* 表单 */
    .form-control {
      background: rgba(26, 31, 43, 0.7);
      border: 1px solid rgba(212, 175, 55, 0.3);
      color: white;
      border-radius: 8px;
      padding: 0.8rem;
    }
    .form-control:focus {
      border-color: var(--champion-gold);
      box-shadow: 0 0 12px rgba(212, 175, 55, 0.4);
      background: rgba(30, 36, 50, 0.8);
    }
    
    footer {
      background: #0a0d13;
      border-top: 1px solid rgba(212, 175, 55, 0.15);
    }
    
    @media (max-width: 768px) {
      h1 {
        font-size: 2.5rem;
      }
      .section-title {
        font-size: 2rem;
      }
      .hero-stats {
        flex-direction: column;
        gap: 1rem;
      }
      .navbar-brand {
        font-size: 1.5rem;
      }
    }