/* roulang page: index */
:root {
      --primary: #1A5F4A;
      --primary-dark: #154E3E;
      --primary-light: rgba(26, 95, 74, 0.1);
      --secondary: #E8B730;
      --secondary-light: rgba(232, 183, 48, 0.15);
      --bg-light: #F7F8F6;
      --bg-dark: #1E2D2B;
      --text-primary: #2C3E38;
      --text-secondary: #5F6C68;
      --border-color: #E0E4E2;
      --shadow-sm: 0 2px 8px rgba(0,0,0,0.04);
      --shadow-md: 0 8px 24px rgba(0,0,0,0.08);
      --shadow-lg: 0 12px 32px rgba(0,0,0,0.12);
      --radius-xs: 8px;
      --radius-sm: 12px;
      --radius-md: 16px;
      --radius-pill: 50px;
      --font-sans: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", "Inter", system-ui, -apple-system, sans-serif;
      --transition-base: 0.25s ease;
    }

    * {
      box-sizing: border-box;
    }

    body {
      font-family: var(--font-sans);
      color: var(--text-primary);
      background-color: #ffffff;
      line-height: 1.75;
      scroll-behavior: smooth;
      -webkit-font-smoothing: antialiased;
    }

    h1, h2, h3, h4, .h1, .h2, .h3 {
      font-weight: 700;
      letter-spacing: -0.3px;
    }

    h1 {
      font-size: 2.5rem;
      line-height: 1.3;
      letter-spacing: -0.5px;
    }

    h2 {
      font-size: 2rem;
      line-height: 1.35;
      margin-top: 80px;
      margin-bottom: 40px;
    }

    h3 {
      font-size: 1.5rem;
      font-weight: 600;
      line-height: 1.4;
    }

    p {
      color: var(--text-secondary);
      margin-bottom: 1.5em;
    }

    .text-small {
      font-size: 0.875rem;
      line-height: 1.5;
    }

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

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

    .container-custom {
      max-width: 1140px;
      margin-left: auto;
      margin-right: auto;
      padding-left: 15px;
      padding-right: 15px;
    }

    /* 按钮重置 */
    .btn {
      font-weight: 600;
      letter-spacing: 0.5px;
      border-radius: var(--radius-xs);
      padding: 12px 28px;
      transition: all 0.25s ease;
      font-size: 1rem;
      border: 2px solid transparent;
    }

    .btn-primary {
      background-color: var(--primary);
      border-color: var(--primary);
      color: white;
    }

    .btn-primary:hover, .btn-primary:focus-visible {
      background-color: var(--primary-dark);
      border-color: var(--primary-dark);
      transform: translateY(-2px);
      box-shadow: 0 8px 20px rgba(26, 95, 74, 0.3);
      color: white;
    }

    .btn-outline-primary {
      background: transparent;
      border-color: var(--primary);
      color: var(--primary);
    }

    .btn-outline-primary:hover, .btn-outline-primary:focus-visible {
      background-color: var(--primary-light);
      border-color: var(--primary);
      color: var(--primary-dark);
      transform: translateY(-2px);
    }

    .btn-lg-cta {
      border-radius: var(--radius-pill);
      padding: 16px 40px;
      font-size: 1.125rem;
      background-color: white;
      color: var(--primary);
      border: 2px solid white;
      font-weight: 700;
    }

    .btn-lg-cta:hover {
      background-color: var(--bg-light);
      border-color: var(--bg-light);
      transform: scale(1.03);
      box-shadow: 0 10px 25px rgba(0,0,0,0.2);
    }

    /* 导航 */
    .navbar-brand {
      font-weight: 700;
      font-size: 1.5rem;
      color: var(--primary) !important;
      letter-spacing: 0.5px;
    }

    .navbar {
      background: rgba(255,255,255,0.85);
      backdrop-filter: blur(10px);
      transition: background 0.3s, box-shadow 0.3s;
      padding-top: 0;
      padding-bottom: 0;
    }

    .navbar.scrolled {
      background: rgba(255,255,255,0.95);
      box-shadow: 0 4px 20px rgba(0,0,0,0.05);
    }

    .nav-first-row {
      height: 60px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      width: 100%;
    }

    .nav-second-row {
      height: 48px;
      display: flex;
      align-items: center;
      overflow-x: auto;
      white-space: nowrap;
      scrollbar-width: none;
      -ms-overflow-style: none;
      border-top: 1px solid var(--border-color);
      background: rgba(255,255,255,0.7);
    }

    .nav-second-row::-webkit-scrollbar {
      display: none;
    }

    .nav-pills-container {
      display: flex;
      gap: 8px;
      padding: 0 15px;
    }

    .nav-pill {
      background: transparent;
      color: var(--text-secondary);
      padding: 6px 18px;
      border-radius: 50px;
      font-weight: 500;
      font-size: 0.95rem;
      transition: all 0.2s;
      border: none;
      display: inline-block;
    }

    .nav-pill:hover {
      background: var(--primary-light);
      color: var(--primary);
    }

    .nav-pill.active {
      background: var(--primary);
      color: white;
      font-weight: 600;
    }

    .search-icon {
      font-size: 1.4rem;
      color: var(--text-primary);
      cursor: pointer;
      margin-right: 15px;
    }

    @media (max-width: 767px) {
      .nav-first-row {
        height: 56px;
      }
      .navbar-brand {
        font-size: 1.3rem;
      }
      .nav-pills-container {
        gap: 4px;
        padding: 0 10px;
      }
      .nav-pill {
        padding: 5px 14px;
        font-size: 0.85rem;
      }
      h1 {
        font-size: 1.8rem;
      }
      h2 {
        font-size: 1.6rem;
        margin-top: 60px;
        margin-bottom: 30px;
      }
    }

    /* Hero */
    .hero-section {
      background: linear-gradient(90deg, rgba(26,95,74,0.7) 0%, rgba(26,95,74,0.3) 60%, rgba(255,255,255,0) 100%), url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
      min-height: 80vh;
      display: flex;
      align-items: center;
      position: relative;
      color: white;
    }

    @media (max-width: 767px) {
      .hero-section {
        background: linear-gradient(0deg, rgba(26,95,74,0.7) 0%, rgba(26,95,74,0.2) 100%), url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
        text-align: center;
      }
    }

    .hero-content {
      padding: 60px 0;
    }

    /* 卡片 */
    .card-custom {
      background: white;
      border-radius: var(--radius-sm);
      box-shadow: var(--shadow-sm);
      transition: all 0.3s ease;
      border: 1px solid var(--border-color);
      height: 100%;
    }

    .card-custom:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-md);
    }

    .icon-circle {
      width: 56px;
      height: 56px;
      background: var(--secondary-light);
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      color: var(--primary);
      font-size: 1.8rem;
      margin-bottom: 16px;
    }

    .feature-card {
      padding: 28px 24px;
      border-radius: var(--radius-xs);
    }

    .scenario-card {
      border-radius: var(--radius-sm);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
      transition: all 0.3s;
    }
    .scenario-card:hover {
      box-shadow: var(--shadow-md);
    }
    .scenario-card img {
      height: 200px;
      object-fit: cover;
      transition: transform 0.4s;
    }
    .scenario-card:hover img {
      transform: scale(1.03);
    }

    .case-card {
      background: #F9FAF9;
      border-left: 4px solid var(--primary);
      border-radius: 0 var(--radius-xs) var(--radius-xs) 0;
      padding: 24px;
    }

    .pricing-card {
      border-radius: var(--radius-md);
      padding: 32px 24px;
      background: white;
      border: 1px solid var(--border-color);
      transition: all 0.3s;
    }
    .pricing-card.featured {
      background: var(--primary-light);
      border-color: var(--primary);
      transform: scale(1.02);
      box-shadow: var(--shadow-md);
    }

    .accordion-button:not(.collapsed) {
      background-color: var(--bg-light);
      color: var(--primary);
      box-shadow: none;
      border-left: 3px solid var(--primary);
    }
    .accordion-button:focus {
      box-shadow: none;
      border-color: var(--border-color);
    }

    .bg-cta {
      background: linear-gradient(135deg, #1A5F4A 0%, #1E3B34 100%);
    }

    footer {
      background: var(--bg-dark);
      color: #B0B8B5;
    }
    footer a:hover {
      color: var(--secondary) !important;
    }
    .social-icon {
      display: inline-flex;
      width: 36px;
      height: 36px;
      border: 1px solid #B0B8B5;
      border-radius: 50%;
      align-items: center;
      justify-content: center;
      margin-right: 8px;
      color: #B0B8B5;
      transition: 0.2s;
    }
    .social-icon:hover {
      background: var(--primary);
      border-color: var(--primary);
      color: white;
    }

    .counter-number {
      font-size: 2.8rem;
      font-weight: 700;
      color: white;
    }