/* roulang page: index */
:root {
      --primary: #0B5E42;
      --primary-dark: #073D2B;
      --accent: #F4A221;
      --bg-warm: #F5F0E8;
      --card-bg: #FFFFFF;
      --faq-bg: #FAF7F2;
      --text-dark: #1A1A1A;
      --text-muted: #5C5C5C;
      --text-light: #B0B0B0;
      --border-light: #D9D9D9;
      --shadow-sm: 0 4px 12px rgba(0,0,0,0.06);
      --shadow-md: 0 12px 24px rgba(0,0,0,0.10);
      --radius-card: 20px;
      --radius-btn: 12px;
      --radius-faq: 8px;
      --transition: 0.25s ease;
      --font-sans: 'PingFang SC', 'Microsoft YaHei', 'Hiragino Sans GB', system-ui, -apple-system, sans-serif;
      --font-number: 'Inter', system-ui, sans-serif;
    }
    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }
    body {
      font-family: var(--font-sans);
      background-color: var(--bg-warm);
      color: var(--text-dark);
      line-height: 1.5;
      -webkit-font-smoothing: antialiased;
    }
    .container {
      max-width: 1200px;
      margin-left: auto;
      margin-right: auto;
      padding-left: 24px;
      padding-right: 24px;
    }
    @media (max-width: 768px) {
      .container {
        padding-left: 16px;
        padding-right: 16px;
      }
    }
    /* 导航 */
    .navbar {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      background: rgba(255,255,255,0.92);
      backdrop-filter: blur(12px);
      -webkit-backdrop-filter: blur(12px);
      border-bottom: 1px solid rgba(0,0,0,0.05);
      z-index: 50;
      transition: var(--transition);
    }
    .nav-link {
      color: var(--text-dark);
      font-weight: 500;
      font-size: 0.95rem;
      transition: color 0.2s;
      text-decoration: none;
      position: relative;
    }
    .nav-link:hover {
      color: var(--primary);
    }
    .nav-link::after {
      content: '';
      position: absolute;
      bottom: -4px;
      left: 0;
      width: 0%;
      height: 2px;
      background: var(--primary);
      transition: width 0.2s ease;
    }
    .nav-link:hover::after {
      width: 100%;
    }
    .btn-primary {
      background-color: var(--accent);
      color: #1A1A1A;
      font-weight: 600;
      padding: 12px 28px;
      border-radius: var(--radius-btn);
      transition: all 0.25s;
      display: inline-block;
      text-align: center;
      border: none;
      cursor: pointer;
      font-size: 1rem;
      box-shadow: 0 4px 10px rgba(244,162,33,0.25);
      text-decoration: none;
    }
    .btn-primary:hover {
      filter: brightness(1.08);
      box-shadow: 0 8px 18px rgba(244,162,33,0.35);
      transform: translateY(-1px);
    }
    .btn-outline-light {
      background: transparent;
      border: 1.5px solid white;
      color: white;
      font-weight: 600;
      padding: 12px 28px;
      border-radius: var(--radius-btn);
      transition: all 0.25s;
      text-decoration: none;
    }
    .btn-outline-light:hover {
      background: white;
      color: var(--primary-dark);
      border-color: white;
    }
    /* 汉堡菜单 */
    .mobile-menu {
      display: none;
      flex-direction: column;
      background: white;
      position: absolute;
      top: 70px;
      left: 0;
      width: 100%;
      padding: 20px 24px;
      box-shadow: 0 10px 20px rgba(0,0,0,0.08);
    }
    #menu-toggle:checked ~ .mobile-menu {
      display: flex;
    }
    .hamburger-line {
      width: 24px;
      height: 2px;
      background: var(--text-dark);
      margin: 5px 0;
      transition: 0.2s;
    }
    /* 板块间距 */
    section {
      padding-top: 100px;
      padding-bottom: 100px;
    }
    @media (max-width: 768px) {
      section {
        padding-top: 60px;
        padding-bottom: 60px;
      }
    }
    .hero-section {
      padding-top: 140px;
      padding-bottom: 120px;
      background: linear-gradient(135deg, #0B5E42 0%, #073D2B 100%);
      position: relative;
      overflow: hidden;
    }
    .hero-bg-img {
      position: absolute;
      right: 0;
      top: 0;
      width: 55%;
      height: 100%;
      background-image: url('/assets/images/backpic/back-1.webp');
      background-size: cover;
      background-position: center;
      opacity: 0.5;
      mask-image: linear-gradient(to left, rgba(0,0,0,0.7) 0%, rgba(0,0,0,0) 90%);
      -webkit-mask-image: linear-gradient(to left, rgba(0,0,0,0.7) 0%, rgba(0,0,0,0) 90%);
    }
    @media (max-width: 768px) {
      .hero-bg-img {
        width: 100%;
        height: 45%;
        top: auto;
        bottom: 0;
        mask-image: linear-gradient(to top, rgba(0,0,0,0.6), transparent);
      }
    }
    .card {
      background: var(--card-bg);
      border-radius: var(--radius-card);
      box-shadow: var(--shadow-sm);
      transition: all 0.3s ease;
    }
    .card:hover {
      transform: translateY(-6px);
      box-shadow: var(--shadow-md);
    }
    .badge-accent {
      background: var(--accent);
      color: white;
      font-weight: 600;
      font-size: 0.8rem;
      padding: 4px 12px;
      border-radius: 40px;
      display: inline-block;
      letter-spacing: 0.3px;
    }
    .faq-item {
      background: var(--faq-bg);
      border-radius: var(--radius-faq);
      margin-bottom: 12px;
      transition: 0.2s;
    }
    .faq-question {
      cursor: pointer;
      padding: 18px 24px;
      font-weight: 600;
      display: flex;
      justify-content: space-between;
      align-items: center;
    }
    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.35s ease;
      padding: 0 24px;
      color: var(--text-muted);
    }
    .faq-item.active .faq-answer {
      max-height: 200px;
      padding-bottom: 20px;
    }
    .faq-item.active {
      border-left: 4px solid var(--primary);
    }
    .arrow-icon {
      transition: transform 0.3s;
    }
    .faq-item.active .arrow-icon {
      transform: rotate(180deg);
    }
    .pricing-highlight {
      border: 2px solid var(--primary);
      position: relative;
      transform: scale(1.02);
      box-shadow: 0 20px 30px rgba(11,94,66,0.15);
    }
    @media (max-width: 768px) {
      .pricing-highlight {
        transform: none;
      }
    }
    footer {
      background: #1A1A1A;
      color: #B0B0B0;
      padding: 60px 0 30px;
    }
    .footer-link {
      color: #B0B0B0;
      text-decoration: none;
      transition: color 0.2s;
    }
    .footer-link:hover {
      color: var(--accent);
    }