/* roulang page: index */
:root {
      --brand-green: #0B5E42;
      --brand-green-dark: #073929;
      --brand-gold: #D4AF37;
      --bg-warm: #F9F7F4;
      --text-main: #1E1E1E;
      --text-secondary: #5A5A5A;
      --text-on-dark: #F0F0F0;
      --card-shadow: 0 4px 20px rgba(0,0,0,0.04);
      --card-shadow-hover: 0 8px 30px rgba(0,0,0,0.08);
      --radius-card: 12px;
      --radius-btn: 8px;
      --radius-lg: 10px;
      --transition-base: all 0.25s ease;
    }

    * {
      box-sizing: border-box;
    }

    body {
      font-family: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', system-ui, -apple-system, sans-serif;
      background-color: var(--bg-warm);
      color: var(--text-main);
      line-height: 1.75;
      margin: 0;
      overflow-x: hidden;
    }

    h1, h2, h3, h4, .h1, .h2, .h3 {
      font-weight: 700;
    }

    a {
      text-decoration: none;
      color: inherit;
      transition: var(--transition-base);
    }

    img {
      max-width: 100%;
      height: auto;
      display: block;
    }

    /* 自定义容器微调 */
    .container-custom {
      max-width: 1200px;
      margin: 0 auto;
      padding-left: 20px;
      padding-right: 20px;
    }

    /* 导航 SaaS 命令栏风格 */
    .navbar {
      height: 72px;
      background: rgba(255, 255, 255, 0.92);
      backdrop-filter: blur(12px);
      box-shadow: 0 4px 20px rgba(0,0,0,0.03);
      padding: 0 2rem;
      position: fixed;
      top: 0;
      width: 100%;
      z-index: 1000;
      display: flex;
      align-items: center;
      justify-content: space-between;
    }

    .navbar-brand {
      font-size: 24px;
      font-weight: 700;
      letter-spacing: 1px;
      color: var(--brand-green) !important;
      display: flex;
      align-items: center;
    }
    .navbar-brand i {
      font-size: 26px;
      margin-right: 8px;
      color: var(--brand-gold);
    }

    .nav-menu {
      display: flex;
      align-items: center;
      gap: 2rem;
      list-style: none;
      margin: 0;
      padding: 0;
    }

    .nav-link {
      font-size: 15px;
      font-weight: 500;
      color: var(--text-main) !important;
      position: relative;
      padding: 6px 0;
      transition: color 0.2s;
    }
    .nav-link::after {
      content: '';
      position: absolute;
      bottom: 0;
      left: 0;
      width: 0;
      height: 2px;
      background: var(--brand-green);
      transition: width 0.25s ease;
    }
    .nav-link:hover {
      color: var(--brand-green) !important;
    }
    .nav-link:hover::after {
      width: 100%;
    }

    .nav-right {
      display: flex;
      align-items: center;
      gap: 1rem;
    }

    .search-box {
      background: white;
      border: 1px solid #e0e0e0;
      border-radius: 40px;
      padding: 8px 16px;
      display: flex;
      align-items: center;
      gap: 8px;
      font-size: 14px;
      color: #999;
      width: 200px;
    }
    .search-box i {
      font-size: 14px;
    }

    .btn-primary-gg {
      background: var(--brand-green);
      border: none;
      color: white;
      font-weight: 600;
      padding: 10px 24px;
      border-radius: var(--radius-btn);
      transition: var(--transition-base);
      white-space: nowrap;
    }
    .btn-primary-gg:hover {
      background: #094e37;
      transform: scale(1.02);
      color: white;
    }

    .btn-outline-gg {
      background: transparent;
      border: 1.5px solid var(--brand-green);
      color: var(--brand-green);
      font-weight: 600;
      padding: 10px 24px;
      border-radius: var(--radius-btn);
      transition: var(--transition-base);
    }
    .btn-outline-gg:hover {
      background: rgba(11,94,66,0.06);
    }

    .btn-gold {
      background: var(--brand-gold);
      border: none;
      color: #1e1e1e;
      font-weight: 700;
      padding: 14px 32px;
      border-radius: var(--radius-lg);
      transition: var(--transition-base);
    }
    .btn-gold:hover {
      background: #c9a633;
      transform: translateY(-2px);
    }

    /* Hero */
    #hero {
      padding: 140px 0 100px;
      background-color: var(--bg-warm);
      background-image: radial-gradient(circle at 20% 30%, rgba(212,175,55,0.05) 0%, transparent 40%);
    }
    .hero-title {
      font-size: 48px;
      font-weight: 700;
      line-height: 1.2;
      color: #0A4B35;
    }
    .hero-sub {
      font-size: 18px;
      color: var(--text-secondary);
      margin: 20px 0 30px;
    }

    .section-gap {
      padding: 100px 0;
    }

    .section-title {
      font-size: 34px;
      font-weight: 700;
      margin-bottom: 16px;
      color: #0A4B35;
    }

    /* 服务卡片不对称网格 */
    .service-grid {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 28px;
    }
    .service-card {
      background: white;
      border-radius: var(--radius-card);
      padding: 32px;
      box-shadow: var(--card-shadow);
      transition: var(--transition-base);
      border: none;
    }
    .service-card:hover {
      box-shadow: var(--card-shadow-hover);
      transform: translateY(-4px);
    }
    .icon-placeholder {
      width: 48px;
      height: 48px;
      background: rgba(11,94,66,0.1);
      border-radius: 12px;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 24px;
      color: var(--brand-green);
    }

    /* 数据带 */
    .stats-bar {
      background: var(--brand-green);
      border-radius: 20px;
      padding: 40px 30px;
      display: flex;
      justify-content: space-around;
      color: white;
      flex-wrap: wrap;
    }
    .stat-number {
      font-size: 42px;
      font-weight: 700;
      font-family: 'Courier New', monospace;
    }

    /* 案例卡片 */
    .case-card {
      background: white;
      border-radius: var(--radius-card);
      overflow: hidden;
      box-shadow: var(--card-shadow);
      transition: var(--transition-base);
    }
    .case-card:hover {
      box-shadow: var(--card-shadow-hover);
      transform: translateY(-6px);
    }

    /* FAQ */
    .accordion-button {
      font-weight: 600;
      font-size: 18px;
      background: white;
      box-shadow: none;
      border-bottom: 1px solid #eee;
    }
    .accordion-button:not(.collapsed) {
      background-color: rgba(11,94,66,0.03);
      color: var(--brand-green);
    }
    .accordion-item {
      border: none;
      border-bottom: 1px solid #eaeaea;
    }

    /* 页脚 */
    .footer {
      background: var(--brand-green-dark);
      color: #ccc;
      padding: 60px 0 30px;
    }
    .footer a:hover {
      color: var(--brand-gold);
    }

    @media (max-width: 992px) {
      .navbar {
        flex-wrap: wrap;
        height: auto;
        padding: 15px;
      }
      .nav-menu {
        gap: 1rem;
      }
    }

    @media (max-width: 768px) {
      .hero-title {
        font-size: 38px;
      }
      .service-grid {
        grid-template-columns: 1fr;
      }
      .stats-bar {
        flex-direction: column;
        gap: 24px;
        text-align: center;
      }
      .nav-menu {
        display: none; /* 移动端汉堡菜单可根据需要添加JS，此处简化处理，保留右侧CTA */
      }
    }