/* roulang page: index */
:root {
      --primary-green: #0E8C3A;
      --primary-dark: #065A26;
      --complementary-gold: #C8A951;
      --dark-rock: #1E1E1E;
      --text-main: #2C3E2E;
      --text-soft: #5A6B5E;
      --bg-page: #F7F8FA;
      --card-white: #FFFFFF;
      --border-light: #E6EDE8;
      --shadow-sm: 0 2px 12px rgba(0, 0, 0, 0.04);
      --shadow-hover: 0 8px 24px rgba(14, 140, 58, 0.12);
      --rounded-card: 12px;
      --rounded-btn: 8px;
      --font-cn: "PingFang SC", "Microsoft YaHei", var(--font-cn-fallback);
      --font-en: "Inter", "Roboto", sans-serif;
      --transition-smooth: all 0.25s ease;
    }

    * {
      margin: 0;
      padding: 0;
      box-sizing: border-box;
    }

    body {
      font-family: var(--font-cn);
      color: var(--text-main);
      background: var(--bg-page);
      line-height: 1.7;
      font-size: 16px;
      -webkit-font-smoothing: antialiased;
    }

    .container {
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 24px;
    }

    /* 图文区域辅助 */
    .section-padding {
      padding: 80px 0;
    }

    @media (max-width: 768px) {
      .section-padding {
        padding: 48px 0;
      }
    }

    /* 文本层级 */
    h2 {
      font-size: 36px;
      font-weight: 700;
      line-height: 1.3;
      margin-bottom: 16px;
      color: var(--dark-rock);
    }
    h3 {
      font-size: 22px;
      font-weight: 600;
      line-height: 1.4;
      margin-bottom: 12px;
    }

    /* 导航 —— 固定白底深绿点缀 */
    .navbar {
      position: sticky;
      top: 0;
      z-index: 50;
      background: white;
      box-shadow: 0 2px 10px rgba(0,0,0,0.04);
      padding: 12px 0;
    }
    .nav-container {
      display: flex;
      align-items: center;
      justify-content: space-between;
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 24px;
    }
    .logo-area {
      display: flex;
      align-items: center;
      gap: 8px;
      font-size: 1.7rem;
      font-weight: 700;
      color: var(--primary-green);
      text-decoration: none;
    }
    .logo-icon {
      font-size: 2rem;
    }
    .nav-links {
      display: flex;
      align-items: center;
      gap: 32px;
    }
    .nav-links a {
      text-decoration: none;
      color: var(--text-main);
      font-weight: 500;
      font-size: 1rem;
      transition: color 0.2s;
      position: relative;
    }
    .nav-links a:hover,
    .nav-links a.active {
      color: var(--primary-green);
    }
    .nav-links a.active::after {
      content: '';
      position: absolute;
      bottom: -6px;
      left: 0;
      width: 100%;
      height: 3px;
      background: var(--primary-green);
      border-radius: 2px;
    }
    .nav-cta {
      background: var(--complementary-gold);
      color: var(--dark-rock);
      font-weight: 700;
      padding: 10px 20px;
      border-radius: var(--rounded-btn);
      text-decoration: none;
      transition: var(--transition-smooth);
      font-family: var(--font-en);
      border: none;
      cursor: pointer;
    }
    .nav-cta:hover {
      background: #b8963f;
      transform: scale(1.03);
    }
    .hamburger {
      display: none;
      flex-direction: column;
      gap: 5px;
      background: none;
      border: none;
      cursor: pointer;
    }
    .hamburger span {
      width: 25px;
      height: 3px;
      background: var(--primary-green);
      border-radius: 4px;
    }
    /* 移动端导航 */
    @media (max-width: 768px) {
      .nav-links {
        display: none;
      }
      .hamburger {
        display: flex;
      }
      .mobile-menu {
        display: none;
        position: fixed;
        top: 70px;
        left: 0;
        width: 100%;
        background: var(--primary-green);
        padding: 28px;
        flex-direction: column;
        gap: 20px;
        z-index: 45;
      }
      .mobile-menu.active {
        display: flex;
      }
      .mobile-menu a {
        color: white;
        font-weight: 600;
        font-size: 1.2rem;
        text-decoration: none;
      }
    }

    /* 按钮系统 */
    .btn-primary {
      background: var(--primary-green);
      color: white;
      font-weight: 600;
      padding: 12px 32px;
      border-radius: var(--rounded-btn);
      text-decoration: none;
      display: inline-block;
      transition: var(--transition-smooth);
      font-family: var(--font-en);
      border: none;
      cursor: pointer;
    }
    .btn-primary:hover {
      background: var(--primary-dark);
      transform: scale(1.03);
    }
    .btn-outline {
      background: transparent;
      border: 2px solid var(--primary-green);
      color: var(--primary-green);
      padding: 12px 32px;
      border-radius: var(--rounded-btn);
      text-decoration: none;
      font-weight: 600;
      transition: var(--transition-smooth);
    }
    .btn-outline:hover {
      background: var(--primary-green);
      color: white;
    }
    .btn-gold {
      background: var(--complementary-gold);
      color: var(--dark-rock);
      font-weight: 700;
      padding: 14px 36px;
      border-radius: var(--rounded-btn);
    }

    /* Hero 弧形切割 */
    .hero {
      background: linear-gradient(135deg, #0E8C3A 0%, #065A26 100%);
      color: white;
      padding: 90px 0 72px;
      position: relative;
      clip-path: ellipse(120% 88% at 50% 8%);
    }
    @media (max-width: 768px) {
      .hero {
        clip-path: ellipse(150% 90% at 50% 10%);
      }
    }
    .hero-grid {
      display: flex;
      align-items: center;
      gap: 40px;
    }
    .hero-text h1 {
      font-size: 48px;
      font-weight: 700;
      line-height: 1.2;
      margin-bottom: 20px;
    }
    .hero-stats {
      display: flex;
      gap: 32px;
      margin-top: 40px;
    }
    .stat-number {
      font-family: var(--font-en);
      color: var(--complementary-gold);
      font-size: 2rem;
      font-weight: 700;
    }

    /* 卡片通用 */
    .card {
      background: var(--card-white);
      border-radius: var(--rounded-card);
      box-shadow: var(--shadow-sm);
      padding: 28px;
      transition: var(--transition-smooth);
      height: 100%;
    }
    .card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-hover);
    }

    /* pricing 标签 */
    .badge-popular {
      background: var(--complementary-gold);
      color: #1E1E1E;
      font-weight: 700;
      padding: 4px 14px;
      border-radius: 20px;
      font-size: 0smal;
    }

    /* FAQ 折叠 */
    .faq-item {
      border-bottom: 1px solid var(--border-light);
      padding: 18px 0;
    }
    .faq-question {
      display: flex;
      align-items: center;
      gap: 12px;
      font-weight: 600;
      cursor: pointer;
    }
    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s ease;
      color: var(--text-soft);
    }

    footer {
      background: #1E1E1E;
      color: #ccc;
    }

    /* 图片占位样式 */
    .img-placeholder {
      background: #e0e8e0;
      width: 100%;
      height: 220px;
      background-size: cover;
      background-position: center;
      border-radius: var(--rounded-card);
    }