/* roulang page: index */
@import url('/assets/css/vendor/0b67347532-css2.css');
    :root {
      --primary: #C8102E;
      --primary-dark: #A00D24;
      --secondary: #1A1A2E;
      --accent: #F5A623;
      --soft: #F9FAFB;
      --card: #FFFFFF;
      --main: #111827;
      --body: #4B5563;
      --muted: #6B7280;
      --light: #D1D5DB;
      --radius-card: 16px;
      --radius-btn: 8px;
      --radius-img: 20px;
      --shadow-card: 0 4px 20px rgba(0,0,0,0.06);
      --shadow-hover: 0 8px 30px rgba(0,0,0,0.1);
      --font-sans: 'Inter', 'PingFang SC', 'Microsoft YaHei', system-ui, -apple-system, sans-serif;
      --transition: 0.3s ease;
    }
    * {
      box-sizing: border-box;
    }
    body {
      margin: 0;
      font-family: var(--font-sans);
      background-color: var(--soft);
      color: var(--body);
      line-height: 1.6;
      -webkit-font-smoothing: antialiased;
    }
    img {
      max-width: 100%;
      height: auto;
      display: block;
    }
    a {
      text-decoration: none;
      color: inherit;
      transition: color 0.2s;
    }
    .container {
      max-width: 1280px;
      margin-left: auto;
      margin-right: auto;
      padding-left: 1.5rem;
      padding-right: 1.5rem;
    }
    /* 导航 */
    .nav {
      position: sticky;
      top: 0;
      z-index: 50;
      background: rgba(255,255,255,0.95);
      backdrop-filter: blur(8px);
      box-shadow: var(--shadow-nav, 0 2px 10px rgba(0,0,0,0.04));
      height: 64px;
      display: flex;
      align-items: center;
    }
    .nav-container {
      display: flex;
      justify-content: space-between;
      align-items: center;
      width: 100%;
    }
    .logo {
      font-weight: 700;
      font-size: 1.5rem;
      color: var(--primary);
      letter-spacing: -0.5px;
    }
    .nav-links {
      display: flex;
      gap: 2rem;
      align-items: center;
    }
    .nav-links a {
      font-size: 0.9375rem;
      font-weight: 500;
      color: #374151;
      position: relative;
      padding-bottom: 4px;
    }
    .nav-links a::after {
      content: '';
      position: absolute;
      bottom: 0;
      left: 0;
      width: 0;
      height: 2px;
      background: var(--primary);
      transition: width 0.25s ease;
    }
    .nav-links a:hover::after,
    .nav-links a.active::after {
      width: 100%;
    }
    .btn-primary {
      background: var(--primary);
      color: white;
      font-weight: 600;
      padding: 0.5rem 1.25rem;
      border-radius: var(--radius-btn);
      display: inline-flex;
      align-items: center;
      justify-content: center;
      transition: background var(--transition), transform 0.2s;
      border: none;
      cursor: pointer;
      font-size: 0.9375rem;
    }
    .btn-primary:hover {
      background: var(--primary-dark);
      transform: translateY(-1px);
    }
    .btn-outline {
      background: transparent;
      border: 2px solid var(--primary);
      color: var(--primary);
      font-weight: 600;
      padding: 0.5rem 1.5rem;
      border-radius: var(--radius-btn);
      transition: all var(--transition);
      display: inline-flex;
      align-items: center;
    }
    .btn-outline:hover {
      background: var(--primary);
      color: white;
    }
    .hamburger {
      display: none;
      flex-direction: column;
      gap: 5px;
      background: none;
      border: none;
      cursor: pointer;
    }
    .hamburger span {
      width: 24px;
      height: 2.5px;
      background: var(--main);
      border-radius: 2px;
      transition: 0.3s;
    }
    /* 区块间距 */
    .section {
      padding: 5rem 0;
    }
    .section-title {
      font-size: 2.25rem;
      font-weight: 700;
      color: var(--main);
      margin-bottom: 1rem;
      letter-spacing: -0.5px;
    }
    .card {
      background: var(--card);
      border-radius: var(--radius-card);
      box-shadow: var(--shadow-card);
      transition: transform var(--transition), box-shadow var(--transition);
    }
    .card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-hover);
    }
    .badge-pill {
      background: #FEE2E2;
      color: var(--primary);
      font-weight: 600;
      padding: 0.25rem 0.9rem;
      border-radius: var(--pill);
      font-size: 0.8rem;
      display: inline-block;
    }
    .stat-number {
      font-size: 2.5rem;
      font-weight: 800;
      color: var(--primary);
      line-height: 1.2;
    }
    .faq-item {
      border-bottom: 1px solid #E5E7EB;
    }
    .faq-question {
      width: 100%;
      background: transparent;
      border: none;
      text-align: left;
      padding: 1rem 0;
      font-weight: 500;
      font-size: 1rem;
      color: var(--main);
      display: flex;
      justify-content: space-between;
      align-items: center;
      cursor: pointer;
    }
    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.35s ease, padding 0.2s;
      background: var(--soft);
      border-radius: 8px;
      padding: 0 1rem;
    }
    .faq-item.active .faq-answer {
      max-height: 200px;
      padding: 1rem;
    }
    .arrow {
      transition: transform 0.3s;
    }
    .faq-item.active .arrow {
      transform: rotate(180deg);
    }
    /* 移动端菜单 */
    @media (max-width: 768px) {
      .nav-links {
        position: fixed;
        top: 64px;
        left: 0;
        width: 100%;
        background: white;
        flex-direction: column;
        gap: 0;
        box-shadow: 0 10px 20px rgba(0,0,0,0.05);
        transform: translateY(-120%);
        opacity: 0;
        transition: transform 0.3s, opacity 0.3s;
        padding: 1rem 0;
      }
      .nav-links.open {
        transform: translateY(0);
        opacity: 1;
      }
      .nav-links a {
        padding: 0.8rem 2rem;
        width: 100%;
        border-bottom: 1px solid #f3f4f6;
      }
      .hamburger {
        display: flex;
      }
      .hero-title {
        font-size: 2rem !important;
      }
      .section-title {
        font-size: 1.8rem;
      }
    }
    .gradient-cta {
      background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    }
    footer a:hover {
      color: white;
      transition: color 0.2s;
    }