/* roulang page: index */
:root {
      --primary: #E94E1B;
      --primary-dark: #C43D13;
      --primary-light: #FF8C69;
      --deep-bg: #1A1C20;
      --card-bg: #FFFFFF;
      --light-bg: #F8F9FA;
      --border-light: #E5E7EB;
      --text-main: #1F2937;
      --text-muted: #6B7280;
      --radius-sm: 8px;
      --shadow-card: 0 4px 12px rgba(0,0,0,0.04);
      --shadow-hover: 0 12px 28px rgba(0,0,0,0.08);
      --transition: all 0.2s ease;
    }
    * {
      box-sizing: border-box;
    }
    body {
      font-family: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', sans-serif;
      margin: 0;
      background-color: #fff;
      color: var(--text-main);
      line-height: 1.6;
      -webkit-font-smoothing: antialiased;
    }
    .container {
      max-width: 1280px;
      margin: 0 auto;
      padding: 0 32px;
    }
    @media (max-width: 768px) {
      .container {
        padding: 0 20px;
      }
    }
    /* 导航系统 */
    .top-bar {
      height: 36px;
      background-color: #0f1115;
      color: #d1d5db;
      font-size: 0.8rem;
      display: flex;
      align-items: center;
      border-bottom: 1px solid #2a2d33;
    }
    .score-ticker {
      display: flex;
      align-items: center;
      gap: 20px;
      overflow: hidden;
      white-space: nowrap;
      flex: 1;
      mask-image: linear-gradient(to right, black 70%, transparent 98%);
      -webkit-mask-image: linear-gradient(to right, black 70%, transparent 98%);
    }
    .ticker-item {
      display: inline-flex;
      gap: 10px;
      align-items: center;
      animation: scrollLeft 18s linear infinite;
    }
    @keyframes scrollLeft {
      0% { transform: translateX(0); }
      100% { transform: translateX(-50%); }
    }
    .glass-nav {
      background: rgba(26, 28, 32, 0.92);
      backdrop-filter: blur(12px);
      -webkit-backdrop-filter: blur(12px);
      border-bottom: 1px solid rgba(255,255,255,0.08);
      padding: 0 32px;
      height: 72px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      position: sticky;
      top: 0;
      z-index: 50;
    }
    .logo-text {
      font-weight: 800;
      font-size: 1.7rem;
      letter-spacing: -0.5px;
      color: #fff;
      display: flex;
      align-items: center;
      gap: 6px;
    }
    .logo-text i {
      color: var(--primary);
      font-size: 1.9rem;
    }
    .nav-links {
      display: flex;
      gap: 32px;
      align-items: center;
    }
    .nav-links a {
      font-weight: 500;
      font-size: 1rem;
      color: #e5e7eb;
      text-decoration: none;
      position: relative;
      padding: 4px 0;
      transition: color 0.2s;
    }
    .nav-links a::after {
      content: '';
      position: absolute;
      bottom: -2px;
      left: 50%;
      transform: translateX(-50%);
      width: 0;
      height: 2px;
      background: var(--primary);
      transition: width 0.2s ease;
    }
    .nav-links a:hover {
      color: #fff;
    }
    .nav-links a:hover::after {
      width: 100%;
    }
    .btn-outline-white {
      border: 1px solid #fff;
      color: #fff;
      padding: 8px 20px;
      border-radius: 30px;
      font-weight: 500;
      transition: var(--transition);
    }
    .btn-outline-white:hover {
      background: #fff;
      color: #1A1C20;
    }
    .hamburger {
      display: none;
      font-size: 1.8rem;
      color: #fff;
    }
    @media (max-width: 768px) {
      .nav-links {
        display: none;
      }
      .hamburger {
        display: block;
      }
      .glass-nav {
        padding: 0 20px;
      }
    }
    /* 按钮系统 */
    .btn-primary {
      background: var(--primary);
      color: #fff;
      font-weight: 600;
      padding: 14px 32px;
      border-radius: 8px;
      display: inline-block;
      transition: var(--transition);
      box-shadow: 0 4px 10px rgba(233,78,27,0.3);
      border: none;
      cursor: pointer;
      text-decoration: none;
    }
    .btn-primary:hover {
      background: var(--primary-dark);
      box-shadow: 0 6px 16px rgba(233,78,27,0.5);
      transform: translateY(-1px);
    }
    .btn-ghost {
      border: 1px solid var(--deep-bg);
      color: var(--deep-bg);
      background: transparent;
      padding: 12px 28px;
      border-radius: 8px;
      font-weight: 600;
      transition: var(--transition);
      display: inline-block;
    }
    .btn-ghost:hover {
      background: var(--deep-bg);
      color: #fff;
    }
    /* 卡片 */
    .service-card {
      background: var(--card-bg);
      border: 1px solid var(--border-light);
      border-radius: var(--radius-sm);
      padding: 28px 20px;
      transition: var(--transition);
      box-shadow: var(--shadow-card);
      height: 100%;
    }
    .service-card:hover {
      border-color: var(--primary);
      transform: translateY(-6px);
      box-shadow: var(--shadow-hover);
    }
    .data-stat {
      font-family: 'DIN Alternate', 'Courier New', monospace;
      font-weight: 800;
      font-size: 3.4rem;
      background: linear-gradient(135deg, #E94E1B 0%, #FF8C69 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
    }
    .faq-item {
      border-bottom: 1px solid var(--border-light);
    }
    .faq-question {
      cursor: pointer;
      padding: 18px 0;
      display: flex;
      justify-content: space-between;
      align-items: center;
      font-weight: 600;
      border-left: 4px solid var(--primary);
      padding-left: 16px;
      transition: background 0.2s;
    }
    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s ease;
      padding-left: 20px;
      color: var(--text-muted);
    }
    .footer-link:hover {
      color: #fff;
      transition: color 0.2s;
    }
    input, textarea {
      border: none;
      border-bottom: 2px solid #d1d5db;
      padding: 12px 4px;
      width: 100%;
      outline: none;
      transition: border-color 0.2s;
      background: transparent;
    }
    input:focus, textarea:focus {
      border-bottom-color: var(--primary);
    }