/* roulang page: index */
@import url('/assets/css/vendor/1ecd1de215-css2.css');
    :root {
      --primary: #0B2B1F;
      --secondary: #E94E1F;
      --bg-warm: #F5F0E8;
      --accent: #FFC107;
      --dark-bg: #1A1F1C;
      --text-main: #2C2C2C;
      --text-muted: #5F6B63;
      --text-light: #FFFFFF;
      --text-light-muted: #B0B8B1;
      --border-light: #E5E0D8;
      --radius-card: 12px;
      --radius-btn: 8px;
      --radius-nav: 40px;
      --shadow-card: 0 4px 20px rgba(0,0,0,0.04);
      --shadow-card-hover: 0 8px 30px rgba(0,0,0,0.08);
      --shadow-nav: 0 4px 15px rgba(0,0,0,0.05);
      --transition: all 0.25s ease;
    }
    body {
      font-family: 'Inter', 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', system-ui, -apple-system, sans-serif;
      background-color: var(--bg-warm);
      color: var(--text-main);
      line-height: 1.6;
      margin: 0;
      -webkit-font-smoothing: antialiased;
    }
    *, *::before, *::after {
      box-sizing: border-box;
    }
    a, button, input {
      font-family: inherit;
    }
    img {
      max-width: 100%;
      height: auto;
      display: block;
    }
    .container-main {
      max-width: 1280px;
      margin: 0 auto;
      padding: 0 40px;
    }
    @media (max-width: 768px) {
      .container-main {
        padding: 0 20px;
      }
    }
    /* 浮动导航 */
    .nav-dock {
      position: fixed;
      top: 20px;
      left: 50%;
      transform: translateX(-50%);
      width: auto;
      max-width: 720px;
      background: rgba(255,255,255,0.88);
      backdrop-filter: blur(12px);
      -webkit-backdrop-filter: blur(12px);
      border-radius: var(--radius-nav);
      box-shadow: var(--shadow-nav);
      padding: 8px 24px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      z-index: 1000;
      transition: var(--transition);
    }
    .nav-dock.scrolled {
      box-shadow: 0 8px 25px rgba(0,0,0,0.1);
      background: rgba(255,255,255,0.95);
    }
    .nav-logo {
      font-weight: 700;
      font-size: 1.25rem;
      color: var(--primary);
      letter-spacing: -0.5px;
      white-space: nowrap;
    }
    .nav-links {
      display: flex;
      gap: 24px;
      align-items: center;
    }
    .nav-links a {
      text-decoration: none;
      color: var(--primary);
      font-weight: 500;
      font-size: 0.95rem;
      transition: var(--transition);
      position: relative;
      padding-bottom: 2px;
      border-bottom: 2px solid transparent;
    }
    .nav-links a:hover {
      border-bottom-color: var(--secondary);
      color: var(--secondary);
    }
    .nav-cta {
      background: var(--secondary);
      color: white;
      padding: 8px 18px;
      border-radius: 30px;
      font-weight: 600;
      font-size: 0.9rem;
      text-decoration: none;
      transition: var(--transition);
      white-space: nowrap;
      box-shadow: 0 2px 8px rgba(233,78,31,0.2);
    }
    .nav-cta:hover {
      filter: brightness(1.1);
      transform: scale(1.02);
    }
    .hamburger {
      display: none;
      background: none;
      border: none;
      font-size: 1.6rem;
      color: var(--primary);
      cursor: pointer;
      padding: 4px;
    }
    @media (max-width: 768px) {
      .nav-dock {
        width: calc(100% - 32px);
        left: 16px;
        transform: none;
        border-radius: 32px;
        padding: 8px 20px;
      }
      .nav-links {
        display: none;
      }
      .hamburger {
        display: block;
      }
      .mobile-menu {
        display: none;
        position: fixed;
        top: 80px;
        left: 16px;
        right: 16px;
        background: rgba(255,255,255,0.96);
        backdrop-filter: blur(16px);
        border-radius: 24px;
        padding: 24px;
        flex-direction: column;
        gap: 20px;
        box-shadow: 0 15px 30px rgba(0,0,0,0.1);
        z-index: 999;
      }
      .mobile-menu.active {
        display: flex;
      }
    }
    /* hero */
    .hero-section {
      background: linear-gradient(0deg, rgba(11,43,31,0.7) 0%, rgba(26,31,28,0.65) 100%), url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
      min-height: 90vh;
      display: flex;
      align-items: center;
      color: white;
      position: relative;
    }
    .hero-content {
      max-width: 700px;
    }
    .hero-content h1 {
      font-size: clamp(2.4rem, 5vw, 3.5rem);
      font-weight: 800;
      line-height: 1.2;
      margin-bottom: 1.2rem;
      letter-spacing: -1px;
    }
    .hero-sub {
      font-size: 1.2rem;
      color: rgba(245,240,232,0.9);
      margin-bottom: 2rem;
    }
    .btn-primary {
      background: var(--secondary);
      color: white;
      padding: 14px 32px;
      border-radius: var(--radius-btn);
      font-weight: 600;
      text-decoration: none;
      display: inline-block;
      transition: var(--transition);
      box-shadow: 0 4px 12px rgba(233,78,31,0.3);
      font-size: 1rem;
      border: none;
      cursor: pointer;
    }
    .btn-primary:hover {
      filter: brightness(1.1);
      transform: scale(1.02);
    }
    .btn-secondary {
      background: transparent;
      border: 2px solid var(--primary);
      color: var(--primary);
      padding: 12px 28px;
      border-radius: var(--radius-btn);
      font-weight: 600;
      text-decoration: none;
      display: inline-block;
      transition: var(--transition);
    }
    .btn-secondary:hover {
      background: var(--primary);
      color: white;
    }
    .section-padding {
      padding: 100px 0;
    }
    @media (max-width: 768px) {
      .section-padding {
        padding: 70px 0;
      }
    }
    .card {
      background: white;
      border-radius: var(--radius-card);
      box-shadow: var(--shadow-card);
      transition: var(--transition);
      overflow: hidden;
    }
    .card:hover {
      box-shadow: var(--shadow-card-hover);
      transform: translateY(-4px);
    }
    .card-img {
      height: 220px;
      object-fit: cover;
      width: 100%;
    }
    .stat-number {
      font-size: 3.5rem;
      font-weight: 800;
      color: var(--secondary);
      line-height: 1;
      letter-spacing: -1px;
      font-feature-settings: "tnum";
    }
    .faq-item {
      border-bottom: 1px solid var(--border-light);
      padding: 20px 0;
    }
    .faq-question {
      font-weight: 600;
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      color: var(--primary);
    }
    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.35s ease;
      color: var(--text-muted);
    }
    .faq-answer.open {
      max-height: 300px;
      padding-top: 12px;
    }
    .footer-dark {
      background: var(--dark-bg);
      color: var(--text-light-muted);
    }