/* roulang page: index */
:root {
      --primary: #0E8C3A;
      --primary-dark: #0A2E1F;
      --accent: #F15A24;
      --accent-hover: #D94A1A;
      --gold: #F7B32B;
      --bg: #F5F5F0;
      --card-bg: #FFFFFF;
      --text: #2D2D2D;
      --text-light: #666666;
      --border-light: #E8E8E0;
      --radius: 12px;
      --shadow: 0 4px 12px rgba(0,0,0,0.04);
      --shadow-hover: 0 8px 24px rgba(0,0,0,0.08);
      --font-sans: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', system-ui, -apple-system, sans-serif;
      --transition: 0.2s ease;
    }
    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }
    body {
      font-family: var(--font-sans);
      background-color: var(--bg);
      color: var(--text);
      line-height: 1.7;
      font-weight: 400;
      -webkit-font-smoothing: antialiased;
      scroll-behavior: smooth;
    }
    a {
      text-decoration: none;
      color: inherit;
      transition: color var(--transition), text-decoration var(--transition);
    }
    a:hover {
      color: var(--primary);
      text-decoration: underline;
    }
    img {
      max-width: 100%;
      height: auto;
      display: block;
    }
    button, .btn {
      cursor: pointer;
      font-family: inherit;
      transition: all var(--transition);
    }
    .container {
      max-width: 1200px;
      margin: 0 auto;
      padding-left: 24px;
      padding-right: 24px;
    }
    @media (max-width: 640px) {
      .container {
        padding-left: 16px;
        padding-right: 16px;
      }
    }

    /* 导航 */
    .navbar {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      z-index: 50;
      backdrop-filter: blur(12px);
      background-color: rgba(10, 46, 31, 0.8);
      transition: background-color 0.3s;
    }
    .navbar.scrolled {
      background-color: rgba(10, 46, 31, 0.95);
      box-shadow: 0 4px 12px rgba(0,0,0,0.1);
    }
    .nav-container {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 72px;
    }
    .logo {
      font-weight: 800;
      font-size: 1.6rem;
      color: white;
      display: flex;
      align-items: center;
      gap: 8px;
      letter-spacing: -0.3px;
      white-space: nowrap;
    }
    .logo i {
      color: var(--gold);
      font-size: 1.8rem;
    }
    .nav-links {
      display: flex;
      gap: 28px;
      align-items: center;
    }
    .nav-links a {
      color: rgba(255,255,255,0.85);
      font-weight: 500;
      font-size: 0.95rem;
      transition: color 0.2s;
      text-decoration: none;
    }
    .nav-links a:hover {
      color: white;
      text-decoration: underline;
      text-underline-offset: 4px;
    }
    .hamburger {
      display: none;
      flex-direction: column;
      gap: 5px;
      background: none;
      border: none;
      color: white;
      font-size: 1.8rem;
      cursor: pointer;
    }
    .mobile-menu {
      display: none;
      position: absolute;
      top: 72px;
      left: 0;
      width: 100%;
      background-color: var(--primary-dark);
      flex-direction: column;
      padding: 20px 24px;
      gap: 16px;
      border-top: 1px solid rgba(255,255,255,0.1);
    }
    .mobile-menu a {
      color: white;
      font-weight: 500;
      font-size: 1.1rem;
      text-decoration: none;
    }
    @media (max-width: 768px) {
      .nav-links {
        display: none;
      }
      .hamburger {
        display: flex;
      }
      .mobile-menu.active {
        display: flex;
      }
    }

    /* 板块间距 */
    section {
      padding: 80px 0;
    }
    @media (max-width: 640px) {
      section {
        padding: 60px 0;
      }
    }

    /* 按钮 */
    .btn-primary {
      background-color: var(--accent);
      color: white;
      font-weight: 700;
      padding: 14px 32px;
      border-radius: 8px;
      border: none;
      display: inline-block;
      text-align: center;
      transition: all 0.2s;
      box-shadow: 0 4px 10px rgba(241,90,36,0.25);
      text-decoration: none;
    }
    .btn-primary:hover {
      background-color: var(--accent-hover);
      transform: scale(1.02);
      box-shadow: 0 6px 16px rgba(241,90,36,0.35);
      text-decoration: none;
      color: white;
    }
    .btn-outline {
      background: transparent;
      border: 2px solid white;
      color: white;
      font-weight: 700;
      padding: 12px 30px;
      border-radius: 8px;
      display: inline-block;
      transition: all 0.2s;
      text-decoration: none;
    }
    .btn-outline:hover {
      background-color: white;
      color: var(--primary-dark);
      text-decoration: none;
    }

    /* 卡片 */
    .card {
      background: var(--card-bg);
      border-radius: var(--radius);
      box-shadow: var(--shadow);
      padding: 28px 24px;
      transition: all 0.25s;
      height: 100%;
    }
    .card:hover {
      box-shadow: var(--shadow-hover);
      transform: translateY(-4px);
    }
    .service-icon {
      font-size: 2.4rem;
      color: var(--primary);
      margin-bottom: 16px;
    }
    .stat-number {
      font-size: 2.8rem;
      font-weight: 800;
      color: var(--accent);
      line-height: 1.2;
    }
    .tag {
      background-color: #e6f4ea;
      color: var(--primary);
      font-size: 0.8rem;
      padding: 4px 12px;
      border-radius: 20px;
      font-weight: 600;
      display: inline-block;
    }

    /* Hero */
    .hero {
      min-height: 90vh;
      display: flex;
      align-items: center;
      background: linear-gradient(135deg, rgba(10,46,31,0.85) 0%, rgba(14,140,58,0.7) 100%), url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
      color: white;
      position: relative;
    }
    .hero-content {
      max-width: 700px;
    }
    .hero h1 {
      font-size: 3.2rem;
      font-weight: 800;
      letter-spacing: -0.5px;
      line-height: 1.2;
      margin-bottom: 24px;
    }
    .hero .subtitle {
      font-size: 1.2rem;
      opacity: 0.9;
      margin-bottom: 36px;
    }
    @media (max-width: 640px) {
      .hero h1 {
        font-size: 2.2rem;
      }
      .hero .subtitle {
        font-size: 1rem;
      }
    }

    /* FAQ */
    .faq-item {
      border-bottom: 1px solid var(--border-light);
      padding: 18px 0;
      cursor: pointer;
      transition: background 0.2s;
    }
    .faq-item summary {
      font-weight: 700;
      font-size: 1.1rem;
      list-style: none;
      display: flex;
      justify-content: space-between;
      align-items: center;
    }
    .faq-item summary::-webkit-details-marker {
      display: none;
    }
    .faq-item[open] {
      background-color: #f0f7f0;
      border-radius: 8px;
      padding: 18px 16px;
    }

    /* 页脚 */
    footer {
      background-color: var(--primary-dark);
      color: rgba(255,255,255,0.8);
      padding: 48px 0 20px;
    }
    footer a {
      color: rgba(255,255,255,0.9);
    }
    footer a:hover {
      color: white;
    }