/* roulang page: index */
:root {
      --primary-orange: #E8590C;
      --primary-deep-orange: #D04E0A;
      --secondary-charcoal: #1A1D29;
      --accent-green: #00C49A;
      --bg-light: #F9FAFB;
      --card-white: #FFFFFF;
      --text-dark: #1A1D29;
      --text-gray: #4B5563;
      --text-light-gray: #6B7280;
      --text-muted: #9CA3AF;
      --border-light: #E5E7EB;
      --border-dark: #374151;
      --highlight-bg: #FFF0E6;
      --shadow-sm: 0 1px 3px rgba(0,0,0,0.06), 0 1px 2px rgba(0,0,0,0.04);
      --shadow-md: 0 4px 12px rgba(0,0,0,0.08);
      --shadow-orange: 0 4px 12px rgba(232,89,12,0.08);
      --radius-card: 12px;
      --radius-btn: 8px;
      --radius-input: 6px;
      --font-sans: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", sans-serif;
      --font-mono: "SF Mono", "Menlo", "Monaco", monospace;
      --spacing-section: 80px;
    }

    * {
      box-sizing: border-box;
    }

    body {
      font-family: var(--font-sans);
      background-color: var(--bg-light);
      color: var(--text-dark);
      line-height: 1.75;
      margin: 0;
      padding: 0;
      -webkit-font-smoothing: antialiased;
    }

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

    /* 导航栏 */
    .top-bar {
      background: rgba(255,255,255,0.95);
      backdrop-filter: blur(8px);
      border-bottom: 1px solid var(--border-light);
      padding: 0;
      height: 64px;
      display: flex;
      align-items: center;
      position: sticky;
      top: 0;
      z-index: 100;
    }
    .top-bar .menu {
      background: transparent;
    }
    .top-bar .menu a {
      color: var(--text-gray);
      font-weight: 400;
      font-size: 16px;
      padding: 0 16px;
      line-height: 64px;
      transition: color 0.2s;
    }
    .top-bar .menu a:hover {
      color: var(--text-dark);
    }
    .top-bar .menu .active > a {
      color: var(--primary-orange);
      font-weight: 500;
      position: relative;
    }
    .top-bar .menu .active > a::after {
      content: '';
      position: absolute;
      bottom: 16px;
      left: 16px;
      right: 16px;
      height: 3px;
      background: var(--primary-orange);
      border-radius: 2px;
    }
    .logo {
      font-weight: 700;
      font-size: 20px;
      color: var(--primary-orange);
      display: flex;
      align-items: center;
      gap: 8px;
      margin-right: 32px;
    }
    .logo i {
      font-size: 24px;
      color: var(--secondary-charcoal);
      transform: rotate(-15deg);
    }
    .nav-cta {
      margin-left: auto;
      background: var(--primary-orange);
      color: white;
      padding: 10px 24px;
      border-radius: var(--radius-btn);
      font-weight: 500;
      font-size: 14px;
      transition: all 0.2s;
      border: none;
      cursor: pointer;
      white-space: nowrap;
    }
    .nav-cta:hover {
      background: var(--primary-deep-orange);
      box-shadow: var(--shadow-orange);
      transform: translateY(-1px);
      color: white;
    }

    /* 移动端导航调整 */
    @media (max-width: 639px) {
      .top-bar {
        height: 56px;
      }
      .top-bar .menu a {
        line-height: 48px;
        padding: 0 12px;
      }
      .logo {
        font-size: 18px;
      }
    }

    /* Hero */
    #hero {
      padding: 80px 0 60px;
      background: var(--bg-light);
    }
    .hero-content {
      display: flex;
      align-items: center;
      gap: 48px;
    }
    .hero-text h1 {
      font-size: 42px;
      font-weight: 700;
      line-height: 1.3;
      color: var(--text-dark);
      margin-bottom: 20px;
    }
    .hero-text h1 span {
      color: var(--primary-orange);
      border-bottom: 3px solid var(--primary-orange);
      display: inline-block;
    }
    .hero-sub {
      font-size: 18px;
      color: var(--text-light-gray);
      margin-bottom: 32px;
      max-width: 480px;
    }
    .hero-buttons {
      display: flex;
      gap: 16px;
      flex-wrap: wrap;
    }
    .btn-primary {
      background: var(--primary-orange);
      color: white;
      border-radius: var(--radius-btn);
      padding: 14px 32px;
      font-weight: 500;
      font-size: 16px;
      border: none;
      transition: all 0.2s;
      display: inline-block;
      text-decoration: none;
    }
    .btn-primary:hover {
      background: var(--primary-deep-orange);
      box-shadow: var(--shadow-orange);
      transform: translateY(-1px);
      color: white;
    }
    .btn-secondary {
      background: transparent;
      color: var(--secondary-charcoal);
      border: 1.5px solid var(--secondary-charcoal);
      border-radius: var(--radius-btn);
      padding: 14px 32px;
      font-weight: 500;
      font-size: 16px;
      transition: all 0.2s;
      display: inline-block;
      text-decoration: none;
    }
    .btn-secondary:hover {
      background: var(--secondary-charcoal);
      color: white;
    }
    .hero-image {
      background-image: url('/assets/images/backpic/back-1.webp');
      background-size: cover;
      background-position: center;
      border-radius: var(--radius-card);
      min-height: 340px;
      width: 100%;
      box-shadow: var(--shadow-sm);
      position: relative;
    }
    .trust-badges {
      margin-top: 28px;
      display: flex;
      gap: 24px;
      color: var(--text-light-gray);
      font-size: 14px;
      font-weight: 500;
    }
    .trust-badges span {
      display: flex;
      align-items: center;
      gap: 6px;
    }
    .trust-badges i {
      color: var(--accent-green);
    }

    /* 通用板块标题 */
    .section-title {
      text-align: center;
      margin-bottom: 48px;
    }
    .section-title h2 {
      font-size: 32px;
      font-weight: 600;
      color: var(--text-dark);
      margin-bottom: 12px;
    }
    .section-title p {
      color: var(--text-light-gray);
      font-size: 16px;
    }

    /* 核心优势卡片 */
    #features {
      padding: var(--spacing-section) 0;
    }
    .feature-card {
      background: var(--card-white);
      border-radius: var(--radius-card);
      padding: 32px 24px;
      box-shadow: var(--shadow-sm);
      transition: all 0.25s;
      text-align: center;
      height: 100%;
    }
    .feature-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-orange);
    }
    .feature-icon {
      font-size: 36px;
      color: var(--primary-orange);
      margin-bottom: 20px;
    }
    .feature-card h3 {
      font-size: 20px;
      font-weight: 600;
      margin-bottom: 12px;
    }

    /* 产品功能分组 */
    #products {
      padding: var(--spacing-section) 0;
      background: var(--card-white);
    }
    .product-row {
      display: flex;
      align-items: center;
      gap: 48px;
      margin-bottom: 64px;
    }
    .product-row.reverse {
      flex-direction: row-reverse;
    }
    .product-img {
      background-size: cover;
      background-position: center;
      border-radius: var(--radius-card);
      min-height: 280px;
      width: 100%;
      box-shadow: var(--shadow-sm);
    }
    .product-text h3 {
      font-size: 24px;
      font-weight: 600;
      margin-bottom: 16px;
    }
    .product-text ul {
      list-style: none;
      padding-left: 0;
      margin-bottom: 20px;
    }
    .product-text ul li {
      margin-bottom: 10px;
      display: flex;
      align-items: center;
      gap: 10px;
      color: var(--text-gray);
    }
    .product-text ul li i {
      color: var(--primary-orange);
      font-size: 14px;
    }
    .text-link {
      color: var(--primary-orange);
      font-weight: 500;
      text-decoration: none;
      border-bottom: 1px solid transparent;
      transition: 0.2s;
    }
    .text-link:hover {
      border-bottom: 1px solid var(--primary-orange);
    }

    /* 场景卡片 */
    #scenarios {
      padding: var(--spacing-section) 0;
    }
    .scenario-card {
      background: var(--card-white);
      border-radius: var(--radius-card);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
      transition: all 0.25s;
    }
    .scenario-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-orange);
    }
    .scenario-img {
      height: 200px;
      background-size: cover;
      background-position: center;
    }
    .scenario-content {
      padding: 24px;
    }
    .scenario-tag {
      background: var(--highlight-bg);
      color: var(--primary-orange);
      font-size: 13px;
      font-weight: 500;
      padding: 4px 12px;
      border-radius: 20px;
      display: inline-block;
      margin-bottom: 12px;
    }

    /* 数据背书 */
    #cases {
      padding: var(--spacing-section) 0;
      background: var(--secondary-charcoal);
      color: white;
    }
    .stats-grid {
      display: flex;
      justify-content: space-around;
      flex-wrap: wrap;
      text-align: center;
      margin-bottom: 40px;
    }
    .stat-item .stat-number {
      font-family: var(--font-mono);
      font-size: 48px;
      font-weight: 700;
      color: var(--accent-green);
    }
    .stat-label {
      color: var(--text-muted);
      font-size: 16px;
    }
    .client-logos {
      display: flex;
      justify-content: center;
      gap: 40px;
      color: var(--text-muted);
      font-weight: 500;
      flex-wrap: wrap;
    }

    /* FAQ */
    #faq {
      padding: var(--spacing-section) 0;
    }
    .accordion {
      background: transparent;
      border: none;
    }
    .accordion-item {
      border-bottom: 1px solid var(--border-light);
    }
    .accordion-title {
      font-size: 16px;
      font-weight: 500;
      color: var(--text-dark);
      padding: 20px 0;
      border: none;
      background: transparent;
      transition: background 0.2s;
    }
    .accordion-title:hover {
      background: #FAFAFA;
    }
    .accordion-title::before {
      color: var(--primary-orange);
      font-size: 20px;
      margin-right: 12px;
    }
    .accordion-content {
      padding: 0 0 20px 0;
      color: var(--text-gray);
      font-size: 15px;
      background: transparent;
      border: none;
    }

    /* CTA 转化区 */
    #cta {
      padding: 80px 0;
      background: var(--secondary-charcoal);
      text-align: center;
    }
    #cta h2 {
      color: white;
      font-weight: 600;
      margin-bottom: 16px;
    }
    #cta p {
      color: var(--text-muted);
      margin-bottom: 32px;
    }
    .cta-form {
      display: flex;
      gap: 16px;
      justify-content: center;
      flex-wrap: wrap;
      max-width: 700px;
      margin: 0 auto;
    }
    .cta-form input {
      padding: 12px 16px;
      border-radius: var(--radius-input);
      border: 1px solid var(--border-dark);
      background: #2D3142;
      color: white;
      font-size: 16px;
      flex: 1 1 180px;
    }
    .cta-form input:focus {
      outline: none;
      border-color: var(--primary-orange);
    }
    .btn-cta {
      background: var(--primary-orange);
      color: white;
      border: none;
      padding: 12px 32px;
      border-radius: var(--radius-btn);
      font-weight: 500;
      cursor: pointer;
      transition: 0.2s;
    }
    .btn-cta:hover {
      background: var(--primary-deep-orange);
    }

    /* 页脚 */
    #footer {
      background: var(--secondary-charcoal);
      color: var(--text-muted);
      padding: 48px 0 24px;
      border-top: 1px solid var(--border-dark);
    }
    .footer-grid {
      display: flex;
      justify-content: space-between;
      flex-wrap: wrap;
      gap: 32px;
      margin-bottom: 32px;
    }
    .footer-col h4 {
      color: white;
      font-weight: 600;
      margin-bottom: 16px;
    }
    .footer-col a {
      color: var(--text-muted);
      display: block;
      margin-bottom: 10px;
      text-decoration: none;
      transition: color 0.2s;
    }
    .footer-col a:hover {
      color: white;
    }
    .copyright {
      border-top: 1px solid var(--border-dark);
      padding-top: 20px;
      text-align: center;
      font-size: 14px;
    }

    /* 响应式调整 */
    @media (max-width: 1023px) {
      .hero-content {
        flex-direction: column;
      }
      .product-row, .product-row.reverse {
        flex-direction: column;
      }
      .stats-grid {
        gap: 32px;
      }
    }
    @media (max-width: 639px) {
      .hero-text h1 {
        font-size: 32px;
      }
      .section-title h2 {
        font-size: 26px;
      }
      .hero-buttons .btn-primary, .hero-buttons .btn-secondary {
        width: 100%;
        text-align: center;
      }
    }