/* roulang page: index */
@import url('/assets/css/vendor/1ecd1de215-css2.css');
    
    :root {
      --primary: #E43D1B;
      --primary-dark: #C72E0A;
      --secondary: #1B1E2B;
      --accent: #FFB81C;
      --bg-soft: #F7F5F2;
      --text-main: #1E1E1E;
      --text-muted: #5A5A5A;
      --white: #FFFFFF;
      --card-shadow: 0 4px 20px rgba(0,0,0,0.06);
      --card-hover-shadow: 0 12px 32px rgba(0,0,0,0.12);
      --radius-xl: 24px;
      --radius-lg: 16px;
      --radius-md: 12px;
      --radius-full: 999px;
      --font-heading: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', sans-serif;
      --font-body: 'PingFang SC', 'Noto Sans SC', 'Microsoft YaHei', sans-serif;
    }
    
    * {
      box-sizing: border-box;
    }
    
    body {
      margin: 0;
      font-family: var(--font-body);
      background-color: var(--bg-soft);
      color: var(--text-main);
      line-height: 1.7;
      -webkit-font-smoothing: antialiased;
    }
    
    h1, h2, h3, h4 {
      font-family: var(--font-heading);
      font-weight: 600;
      letter-spacing: -0.02em;
    }
    
    .container-main {
      max-width: 1280px;
      margin-left: auto;
      margin-right: auto;
      padding-left: 1.5rem;
      padding-right: 1.5rem;
    }
    
    @media (min-width: 768px) {
      .container-main {
        padding-left: 2rem;
        padding-right: 2rem;
      }
    }
    
    /* 导航胶囊 */
    .nav-capsule {
      background: rgba(27, 30, 43, 0.85);
      backdrop-filter: blur(18px);
      -webkit-backdrop-filter: blur(18px);
      border-radius: 40px;
      padding: 0.75rem 1.5rem;
      box-shadow: 0 4px 20px rgba(0,0,0,0.25);
    }
    
    .nav-link {
      color: white;
      font-weight: 500;
      transition: color 0.2s, transform 0.2s;
      position: relative;
      white-space: nowrap;
    }
    .nav-link:hover {
      color: var(--accent);
      transform: translateY(-1px);
    }
    .nav-link.active {
      color: var(--accent);
    }
    .nav-link.active::after {
      content: '';
      position: absolute;
      bottom: -6px;
      left: 50%;
      transform: translateX(-50%);
      width: 6px;
      height: 6px;
      background: var(--accent);
      border-radius: 50%;
    }
    
    /* 移动端底部导航 */
    .mobile-nav {
      background: rgba(27, 30, 43, 0.92);
      backdrop-filter: blur(20px);
      -webkit-backdrop-filter: blur(20px);
      border-radius: 40px;
      padding: 0.5rem 1rem;
    }
    
    /* 卡片与动画 */
    .brand-card {
      background: var(--white);
      border-radius: var(--radius-xl);
      box-shadow: var(--card-shadow);
      transition: all 0.25s ease;
    }
    .brand-card:hover {
      box-shadow: var(--card-hover-shadow);
      transform: translateY(-4px);
    }
    
    .btn-primary {
      background: linear-gradient(135deg, #E43D1B 0%, #C72E0A 100%);
      color: white;
      font-weight: 600;
      border-radius: var(--radius-full);
      padding: 0.9rem 2.2rem;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      transition: all 0.2s;
      box-shadow: 0 8px 18px rgba(228,61,27,0.3);
      border: none;
      cursor: pointer;
      letter-spacing: 0.3px;
    }
    .btn-primary:hover {
      transform: scale(1.03);
      box-shadow: 0 12px 24px rgba(228,61,27,0.4);
      filter: brightness(1.05);
    }
    
    .btn-outline {
      background: transparent;
      border: 2px solid var(--primary);
      color: var(--primary);
      font-weight: 600;
      border-radius: var(--radius-full);
      padding: 0.85rem 2.1rem;
      transition: 0.2s;
      cursor: pointer;
    }
    .btn-outline:hover {
      background: rgba(228,61,27,0.08);
      border-color: #C72E0A;
      color: #C72E0A;
    }
    
    .accent-badge {
      background: var(--accent);
      color: #1B1E2B;
      font-weight: 700;
      border-radius: 40px;
      padding: 0.2rem 1rem;
      font-size: 0.9rem;
      display: inline-block;
    }
    
    .data-badge {
      background: white;
      border-radius: 20px;
      padding: 1.5rem 1rem;
      text-align: center;
      box-shadow: 0 8px 24px rgba(0,0,0,0.04);
      background: radial-gradient(circle at 50% 0%, rgba(255,184,28,0.15), transparent 70%);
    }
    
    /* 手风琴 */
    .faq-item {
      border-bottom: 1px solid #e9e5e0;
    }
    .faq-item:last-child {
      border-bottom: none;
    }
    .faq-question {
      cursor: pointer;
      font-weight: 600;
      display: flex;
      justify-content: space-between;
      align-items: center;
      padding: 1.2rem 0;
    }
    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s ease;
      color: var(--text-muted);
    }
    .faq-item.open .faq-answer {
      max-height: 200px;
      padding-bottom: 1rem;
    }
    
    footer a {
      color: #b0b3be;
      transition: color 0.2s;
    }
    footer a:hover {
      color: var(--accent);
    }
    
    @media (max-width: 767px) {
      .desktop-nav {
        display: none;
      }
      .mobile-nav {
        display: flex;
      }
      h1 {
        font-size: 2.5rem !important;
      }
    }
    @media (min-width: 768px) {
      .mobile-nav {
        display: none;
      }
    }