/* roulang page: index */
:root {
      --primary: #0D9488;
      --primary-hover: #0F766E;
      --primary-light: #F0FDFA;
      --accent: #F97316;
      --accent-hover: #EA580C;
      --dark: #0F172A;
      --dark-card: #1E293B;
      --text: #334155;
      --text-muted: #64748B;
      --border: #E2E8F0;
      --bg-light: #F8FAFC;
      --bg-white: #FFFFFF;
      --radius-sm: 6px;
      --radius-md: 10px;
      --radius-lg: 16px;
      --shadow-sm: 0 1px 3px rgba(15, 23, 42, 0.08);
      --shadow-md: 0 4px 20px -2px rgba(15, 23, 42, 0.06);
      --shadow-lg: 0 10px 30px -5px rgba(15, 23, 42, 0.1);
      --font-stack: system-ui, -apple-system, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
    }

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

    html {
      scroll-behavior: smooth;
      font-size: 16px;
    }

    body {
      font-family: var(--font-stack);
      color: var(--text);
      background-color: var(--bg-white);
      line-height: 1.65;
      -webkit-font-smoothing: antialiased;
    }

    a {
      text-decoration: none;
      color: inherit;
      transition: all 0.25s ease;
    }

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

    button, input, select, textarea {
      font-family: inherit;
    }

    .container {
      width: 100%;
      max-width: 1200px;
      margin-left: auto;
      margin-right: auto;
      padding-left: 20px;
      padding-right: 20px;
    }

    /* 顶部通告与全局导航 */
    .top-bar {
      background-color: #F1F5F9;
      font-size: 13px;
      color: var(--text-muted);
      border-bottom: 1px solid var(--border);
      padding: 8px 0;
    }
    .top-bar-inner {
      display: flex;
      justify-content: space-between;
      align-items: center;
      flex-wrap: wrap;
      gap: 10px;
    }
    .top-notice {
      display: flex;
      align-items: center;
      gap: 6px;
    }
    .top-notice span {
      background-color: var(--primary);
      color: #fff;
      font-size: 11px;
      padding: 2px 6px;
      border-radius: 4px;
    }
    .top-contact a {
      color: var(--text-muted);
      margin-left: 16px;
    }
    .top-contact a:hover {
      color: var(--primary);
    }

    .site-header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(255, 255, 255, 0.96);
      backdrop-filter: blur(10px);
      border-bottom: 1px solid var(--border);
    }
    .header-container {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 72px;
    }
    .brand-logo {
      display: flex;
      align-items: center;
      gap: 10px;
      font-size: 20px;
      font-weight: 700;
      color: var(--dark);
    }
    .brand-logo-icon {
      width: 38px;
      height: 38px;
      background: linear-gradient(135deg, var(--primary) 0%, #047857 100%);
      border-radius: var(--radius-sm);
      display: flex;
      align-items: center;
      justify-content: center;
      color: #fff;
      font-weight: 800;
      font-size: 18px;
    }
    .nav-links {
      display: flex;
      align-items: center;
      list-style: none;
      gap: 28px;
    }
    .nav-links a {
      font-size: 15px;
      font-weight: 500;
      color: var(--text);
    }
    .nav-links a:hover,
    .nav-links a.active {
      color: var(--primary);
    }
    .header-cta {
      display: flex;
      align-items: center;
      gap: 14px;
    }

    /* 汉堡菜单 */
    .menu-toggle {
      display: none;
      background: none;
      border: none;
      cursor: pointer;
      padding: 8px;
    }
    .menu-toggle span {
      display: block;
      width: 24px;
      height: 2px;
      background-color: var(--dark);
      margin: 5px 0;
      transition: 0.3s;
    }

    /* 按钮通用组件 */
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 11px 24px;
      font-size: 15px;
      font-weight: 600;
      border-radius: var(--radius-sm);
      cursor: pointer;
      transition: all 0.25s ease;
      border: 1px solid transparent;
      gap: 8px;
    }
    .btn-primary {
      background-color: var(--primary);
      color: #ffffff;
      box-shadow: 0 4px 12px rgba(13, 148, 136, 0.25);
    }
    .btn-primary:hover {
      background-color: var(--primary-hover);
      transform: translateY(-2px);
      box-shadow: 0 6px 18px rgba(13, 148, 136, 0.35);
    }
    .btn-accent {
      background-color: var(--accent);
      color: #ffffff;
      box-shadow: 0 4px 12px rgba(249, 115, 22, 0.25);
    }
    .btn-accent:hover {
      background-color: var(--accent-hover);
      transform: translateY(-2px);
      box-shadow: 0 6px 18px rgba(249, 115, 22, 0.35);
    }
    .btn-outline {
      border-color: var(--border);
      background-color: #ffffff;
      color: var(--text);
    }
    .btn-outline:hover {
      border-color: var(--primary);
      color: var(--primary);
      background-color: var(--primary-light);
    }

    /* 基础通用板块 */
    .section-wrap {
      padding: 88px 0;
    }
    .section-bg-light {
      background-color: var(--bg-light);
    }
    .section-bg-white {
      background-color: var(--bg-white);
    }
    .section-header {
      text-align: center;
      max-width: 820px;
      margin: 0 auto 54px;
    }
    .section-tag {
      display: inline-block;
      font-size: 13px;
      font-weight: 600;
      color: var(--primary);
      background-color: var(--primary-light);
      padding: 4px 12px;
      border-radius: 20px;
      margin-bottom: 12px;
      text-transform: uppercase;
      letter-spacing: 0.5px;
    }
    .section-title {
      font-size: 32px;
      font-weight: 700;
      color: var(--dark);
      line-height: 1.3;
      margin-bottom: 16px;
    }
    .section-subtitle {
      font-size: 16px;
      color: var(--text-muted);
      line-height: 1.7;
    }

    /* 1. Hero 板块：白皮书获客与核心价值主张 */
    .hero-section {
      background: linear-gradient(180deg, #F0FDFA 0%, #FFFFFF 100%);
      padding: 80px 0 90px;
      border-bottom: 1px solid var(--border);
    }
    .hero-grid {
      display: grid;
      grid-template-columns: 1.15fr 0.85fr;
      gap: 50px;
      align-items: center;
    }
    .hero-badge {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      background: #CCFBF1;
      color: #0F766E;
      padding: 6px 14px;
      border-radius: 30px;
      font-size: 13px;
      font-weight: 600;
      margin-bottom: 20px;
    }
    .hero-title {
      font-size: 42px;
      font-weight: 800;
      color: var(--dark);
      line-height: 1.25;
      margin-bottom: 20px;
      letter-spacing: -0.5px;
    }
    .hero-desc {
      font-size: 16px;
      color: var(--text-muted);
      line-height: 1.75;
      margin-bottom: 30px;
    }
    .hero-actions {
      display: flex;
      flex-wrap: wrap;
      gap: 16px;
      margin-bottom: 36px;
    }
    .hero-trust-list {
      display: flex;
      align-items: center;
      gap: 24px;
      border-top: 1px solid var(--border);
      padding-top: 24px;
    }
    .trust-item {
      display: flex;
      align-items: center;
      gap: 8px;
      font-size: 13px;
      color: var(--text-muted);
    }
    .trust-item svg {
      width: 18px;
      height: 18px;
      color: var(--primary);
      flex-shrink: 0;
    }

    /* Hero 右侧白皮书表单获客卡片 */
    .whitepaper-card {
      background: #FFFFFF;
      border: 1px solid var(--border);
      border-radius: var(--radius-lg);
      padding: 32px;
      box-shadow: var(--shadow-lg);
      position: relative;
    }
    .whitepaper-card::before {
      content: "最新发布";
      position: absolute;
      top: -12px;
      right: 24px;
      background: var(--accent);
      color: #ffffff;
      font-size: 12px;
      font-weight: 700;
      padding: 3px 10px;
      border-radius: 12px;
    }
    .whitepaper-header {
      margin-bottom: 20px;
    }
    .whitepaper-header h3 {
      font-size: 20px;
      color: var(--dark);
      margin-bottom: 8px;
    }
    .whitepaper-header p {
      font-size: 13px;
      color: var(--text-muted);
      line-height: 1.5;
    }
    .whitepaper-catalog {
      background: var(--bg-light);
      border-radius: var(--radius-sm);
      padding: 14px 16px;
      margin-bottom: 20px;
      font-size: 13px;
      color: var(--text);
    }
    .whitepaper-catalog ul {
      list-style: none;
      margin-top: 6px;
    }
    .whitepaper-catalog li {
      margin-bottom: 4px;
      display: flex;
      align-items: center;
      gap: 6px;
    }
    .whitepaper-catalog li::before {
      content: "•";
      color: var(--primary);
      font-weight: bold;
    }
    .hero-form-group {
      margin-bottom: 14px;
    }
    .hero-form-group input {
      width: 100%;
      padding: 12px 14px;
      border: 1px solid var(--border);
      border-radius: var(--radius-sm);
      font-size: 14px;
      outline: none;
      transition: border-color 0.2s;
    }
    .hero-form-group input:focus {
      border-color: var(--primary);
    }
    .form-tips {
      font-size: 12px;
      color: var(--text-muted);
      margin-top: 10px;
      text-align: center;
    }

    /* 2. 品牌与平台系统概览区 */
    .overview-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 50px;
      align-items: center;
    }
    .overview-img-wrap {
      position: relative;
      border-radius: var(--radius-md);
      overflow: hidden;
      box-shadow: var(--shadow-md);
      border: 1px solid var(--border);
    }
    .overview-content h2 {
      font-size: 30px;
      font-weight: 700;
      color: var(--dark);
      margin-bottom: 18px;
      line-height: 1.35;
    }
    .overview-content p {
      font-size: 15px;
      color: var(--text-muted);
      line-height: 1.7;
      margin-bottom: 20px;
    }
    .auth-badge-box {
      display: inline-flex;
      align-items: center;
      gap: 12px;
      background: #F8FAFC;
      border: 1px dashed var(--primary);
      padding: 12px 18px;
      border-radius: var(--radius-sm);
      margin-top: 12px;
    }
    .auth-badge-box svg {
      width: 28px;
      height: 28px;
      color: var(--primary);
      flex-shrink: 0;
    }
    .auth-badge-text {
      font-size: 13px;
      color: var(--dark);
      font-weight: 600;
    }
    .auth-badge-sub {
      font-size: 12px;
      color: var(--text-muted);
      font-weight: normal;
    }

    /* 3. 核心功能分组优势区（3x2 网格） */
    .features-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }
    .feature-card {
      background: #FFFFFF;
      border: 1px solid var(--border);
      border-radius: var(--radius-md);
      padding: 30px 24px;
      box-shadow: var(--shadow-sm);
      transition: all 0.3s ease;
    }
    .feature-card:hover {
      border-color: var(--primary);
      transform: translateY(-4px);
      box-shadow: var(--shadow-md);
    }
    .feature-icon {
      width: 52px;
      height: 52px;
      background: var(--primary-light);
      border-radius: var(--radius-sm);
      display: flex;
      align-items: center;
      justify-content: center;
      color: var(--primary);
      margin-bottom: 20px;
    }
    .feature-card h3 {
      font-size: 18px;
      font-weight: 700;
      color: var(--dark);
      margin-bottom: 12px;
    }
    .feature-card p {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.65;
    }

    /* 4. 热门体系与产品模块区（3联卡片） */
    .solutions-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 30px;
    }
    .solution-card {
      background: #FFFFFF;
      border: 1px solid var(--border);
      border-radius: var(--radius-md);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
      transition: all 0.3s;
    }
    .solution-card:hover {
      box-shadow: var(--shadow-lg);
      transform: translateY(-4px);
    }
    .solution-img-holder {
      height: 200px;
      overflow: hidden;
      position: relative;
    }
    .solution-img-holder img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: transform 0.4s ease;
    }
    .solution-card:hover .solution-img-holder img {
      transform: scale(1.05);
    }
    .solution-tag-label {
      position: absolute;
      top: 14px;
      left: 14px;
      background: rgba(15, 23, 42, 0.8);
      color: #FFFFFF;
      font-size: 12px;
      padding: 4px 10px;
      border-radius: 4px;
      backdrop-filter: blur(4px);
    }
    .solution-body {
      padding: 24px;
      flex-grow: 1;
      display: flex;
      flex-direction: column;
    }
    .solution-body h3 {
      font-size: 20px;
      font-weight: 700;
      color: var(--dark);
      margin-bottom: 10px;
    }
    .solution-body p {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.6;
      margin-bottom: 16px;
    }
    .solution-specs {
      list-style: none;
      margin-bottom: 24px;
      margin-top: auto;
    }
    .solution-specs li {
      font-size: 13px;
      color: var(--text);
      margin-bottom: 8px;
      display: flex;
      align-items: center;
      gap: 8px;
    }
    .solution-specs li svg {
      width: 16px;
      height: 16px;
      color: var(--primary);
      flex-shrink: 0;
    }

    /* 5. 沉浸式深色理念与技术底座区 */
    .tech-arch-section {
      background-color: var(--dark);
      color: #FFFFFF;
      padding: 90px 0;
    }
    .tech-arch-section .section-title {
      color: #FFFFFF;
    }
    .tech-arch-section .section-subtitle {
      color: #94A3B8;
    }
    .tech-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 30px;
      margin-top: 40px;
    }
    .tech-item {
      background: var(--dark-card);
      border: 1px solid #334155;
      border-radius: var(--radius-md);
      padding: 30px 24px;
    }
    .tech-item-num {
      font-size: 28px;
      font-weight: 800;
      color: var(--primary);
      margin-bottom: 12px;
      font-family: monospace;
    }
    .tech-item h4 {
      font-size: 18px;
      font-weight: 600;
      margin-bottom: 10px;
      color: #F8FAFC;
    }
    .tech-item p {
      font-size: 14px;
      color: #94A3B8;
      line-height: 1.65;
    }

    /* 6. 场景化多端演示区 */
    .multiterminal-box {
      background: #FFFFFF;
      border: 1px solid var(--border);
      border-radius: var(--radius-lg);
      overflow: hidden;
      box-shadow: var(--shadow-md);
    }
    .multiterminal-preview {
      display: grid;
      grid-template-columns: 1.2fr 0.8fr;
      align-items: center;
    }
    .multiterminal-img {
      height: 100%;
      min-height: 380px;
      background: #E2E8F0;
    }
    .multiterminal-img img {
      width: 100%;
      height: 100%;
      object-fit: cover;
    }
    .multiterminal-desc {
      padding: 44px;
    }
    .multiterminal-desc h3 {
      font-size: 24px;
      font-weight: 700;
      color: var(--dark);
      margin-bottom: 16px;
    }
    .multiterminal-desc p {
      font-size: 15px;
      color: var(--text-muted);
      line-height: 1.7;
      margin-bottom: 24px;
    }
    .terminal-tags {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      margin-bottom: 24px;
    }
    .terminal-tag-item {
      font-size: 13px;
      background: var(--bg-light);
      border: 1px solid var(--border);
      padding: 6px 12px;
      border-radius: 6px;
      color: var(--text);
    }

    /* 7. 机构实战成功案例区 */
    .cases-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 30px;
    }
    .case-card {
      background: #FFFFFF;
      border: 1px solid var(--border);
      border-radius: var(--radius-md);
      padding: 32px;
      box-shadow: var(--shadow-sm);
    }
    .case-badge {
      font-size: 12px;
      font-weight: 700;
      color: var(--primary);
      text-transform: uppercase;
      margin-bottom: 10px;
    }
    .case-card h3 {
      font-size: 20px;
      font-weight: 700;
      color: var(--dark);
      margin-bottom: 12px;
    }
    .case-card p {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.65;
      margin-bottom: 20px;
    }
    .case-metrics {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 16px;
      background: var(--bg-light);
      padding: 16px;
      border-radius: var(--radius-sm);
    }
    .case-metric-val {
      font-size: 20px;
      font-weight: 700;
      color: var(--dark);
    }
    .case-metric-lbl {
      font-size: 12px;
      color: var(--text-muted);
    }

    /* 8. 关键数据统计指标条 */
    .metrics-bar-section {
      background: linear-gradient(135deg, #0F766E 0%, #0D9488 100%);
      color: #FFFFFF;
      padding: 50px 0;
    }
    .metrics-flex {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 30px;
      text-align: center;
    }
    .metric-col h4 {
      font-size: 40px;
      font-weight: 800;
      margin-bottom: 6px;
      letter-spacing: -1px;
    }
    .metric-col p {
      font-size: 14px;
      color: #CCFBF1;
    }

    /* 9. 用户口碑评价墙 */
    .testimonials-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }
    .testimonial-card {
      background: #FFFFFF;
      border: 1px solid var(--border);
      border-radius: var(--radius-md);
      padding: 28px;
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
    }
    .star-rating {
      color: #F59E0B;
      font-size: 15px;
      margin-bottom: 14px;
    }
    .testimonial-quote {
      font-size: 14px;
      color: var(--text);
      line-height: 1.65;
      margin-bottom: 20px;
      flex-grow: 1;
    }
    .testimonial-author {
      display: flex;
      align-items: center;
      gap: 12px;
      border-top: 1px solid var(--border);
      padding-top: 16px;
    }
    .author-avatar {
      width: 44px;
      height: 44px;
      background: #E2E8F0;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      color: var(--dark);
      font-size: 16px;
    }
    .author-info h5 {
      font-size: 15px;
      font-weight: 700;
      color: var(--dark);
    }
    .author-info span {
      font-size: 12px;
      color: var(--text-muted);
    }

    /* 10. 方案规格与开通咨询区 */
    .pricing-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
      align-items: stretch;
    }
    .pricing-card {
      background: #FFFFFF;
      border: 1px solid var(--border);
      border-radius: var(--radius-md);
      padding: 36px 28px;
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
      position: relative;
    }
    .pricing-card.popular {
      border: 2px solid var(--primary);
      box-shadow: var(--shadow-lg);
      transform: scale(1.03);
      z-index: 2;
    }
    .popular-tag {
      position: absolute;
      top: -14px;
      left: 50%;
      transform: translateX(-50%);
      background: var(--primary);
      color: #FFFFFF;
      font-size: 12px;
      font-weight: 700;
      padding: 4px 14px;
      border-radius: 20px;
      letter-spacing: 0.5px;
    }
    .pricing-card h3 {
      font-size: 22px;
      font-weight: 700;
      color: var(--dark);
      margin-bottom: 8px;
    }
    .pricing-card .pricing-desc {
      font-size: 13px;
      color: var(--text-muted);
      margin-bottom: 20px;
      min-height: 40px;
    }
    .pricing-price {
      font-size: 34px;
      font-weight: 800;
      color: var(--dark);
      margin-bottom: 24px;
      border-bottom: 1px solid var(--border);
      padding-bottom: 20px;
    }
    .pricing-price span {
      font-size: 14px;
      color: var(--text-muted);
      font-weight: normal;
    }
    .pricing-features {
      list-style: none;
      margin-bottom: 28px;
      flex-grow: 1;
    }
    .pricing-features li {
      font-size: 14px;
      color: var(--text);
      margin-bottom: 12px;
      display: flex;
      align-items: center;
      gap: 10px;
    }
    .pricing-features li svg {
      width: 16px;
      height: 16px;
      color: var(--primary);
      flex-shrink: 0;
    }

    /* 11. 行业动态与教培资讯区 */
    .news-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }
    .news-card {
      background: #FFFFFF;
      border: 1px solid var(--border);
      border-radius: var(--radius-md);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
      transition: all 0.3s ease;
    }
    .news-card:hover {
      box-shadow: var(--shadow-md);
      transform: translateY(-4px);
    }
    .news-img-box {
      height: 180px;
      overflow: hidden;
    }
    .news-img-box img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: transform 0.4s ease;
    }
    .news-card:hover .news-img-box img {
      transform: scale(1.05);
    }
    .news-content {
      padding: 22px;
      display: flex;
      flex-direction: column;
      flex-grow: 1;
    }
    .news-meta {
      font-size: 12px;
      color: var(--text-muted);
      margin-bottom: 8px;
    }
    .news-content h3 {
      font-size: 17px;
      font-weight: 700;
      color: var(--dark);
      margin-bottom: 10px;
      line-height: 1.45;
    }
    .news-content p {
      font-size: 13px;
      color: var(--text-muted);
      line-height: 1.6;
      margin-bottom: 14px;
      flex-grow: 1;
    }
    .news-link {
      font-size: 14px;
      font-weight: 600;
      color: var(--primary);
      display: inline-flex;
      align-items: center;
      gap: 4px;
    }

    /* 12. 常见问题手风琴区 */
    .faq-accordion {
      max-width: 860px;
      margin: 0 auto;
    }
    .faq-item {
      background: #FFFFFF;
      border: 1px solid var(--border);
      border-radius: var(--radius-sm);
      margin-bottom: 14px;
      overflow: hidden;
      transition: border-color 0.25s;
    }
    .faq-item:hover {
      border-color: var(--primary);
    }
    .faq-item summary {
      padding: 18px 22px;
      font-size: 16px;
      font-weight: 600;
      color: var(--dark);
      cursor: pointer;
      list-style: none;
      display: flex;
      justify-content: space-between;
      align-items: center;
      user-select: none;
    }
    .faq-item summary::-webkit-details-marker {
      display: none;
    }
    .faq-icon {
      width: 20px;
      height: 20px;
      transition: transform 0.25s ease;
      color: var(--primary);
    }
    .faq-item[open] .faq-icon {
      transform: rotate(180deg);
    }
    .faq-body {
      padding: 0 22px 18px 22px;
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.7;
      border-top: 1px solid #F1F5F9;
      padding-top: 14px;
    }

    /* 13. 底部终极转化区 */
    .cta-banner-section {
      background: linear-gradient(135deg, #0F172A 0%, #1E293B 100%);
      color: #FFFFFF;
      padding: 80px 0;
      text-align: center;
      position: relative;
    }
    .cta-banner-content {
      max-width: 760px;
      margin: 0 auto;
    }
    .cta-banner-content h2 {
      font-size: 34px;
      font-weight: 800;
      margin-bottom: 16px;
      letter-spacing: -0.5px;
    }
    .cta-banner-content p {
      font-size: 16px;
      color: #94A3B8;
      margin-bottom: 34px;
      line-height: 1.65;
    }
    .cta-button-group {
      display: flex;
      justify-content: center;
      gap: 16px;
      flex-wrap: wrap;
    }

    /* 综合页脚区 */
    .site-footer {
      background-color: #0B1120;
      color: #94A3B8;
      font-size: 14px;
      padding-top: 70px;
      padding-bottom: 30px;
      border-top: 1px solid #1E293B;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 1.4fr 0.8fr 0.8fr 1fr;
      gap: 40px;
      margin-bottom: 50px;
    }
    .footer-brand .brand-logo {
      color: #FFFFFF;
      margin-bottom: 16px;
    }
    .footer-desc {
      font-size: 13px;
      line-height: 1.7;
      color: #64748B;
      margin-bottom: 18px;
    }
    .footer-col h4 {
      font-size: 15px;
      font-weight: 700;
      color: #F8FAFC;
      margin-bottom: 20px;
    }
    .footer-col ul {
      list-style: none;
    }
    .footer-col ul li {
      margin-bottom: 10px;
    }
    .footer-col ul li a {
      color: #94A3B8;
      font-size: 13px;
    }
    .footer-col ul li a:hover {
      color: #FFFFFF;
    }
    .footer-contact-item {
      display: flex;
      align-items: flex-start;
      gap: 10px;
      font-size: 13px;
      margin-bottom: 12px;
      color: #94A3B8;
    }
    .footer-contact-item svg {
      width: 16px;
      height: 16px;
      color: var(--primary);
      margin-top: 3px;
      flex-shrink: 0;
    }
    .footer-bottom {
      border-top: 1px solid #1E293B;
      padding-top: 28px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      flex-wrap: wrap;
      gap: 14px;
      font-size: 12px;
      color: #64748B;
    }

    /* 移动端与响应式适配 */
    @media (max-width: 1024px) {
      .hero-grid,
      .overview-grid,
      .multiterminal-preview,
      .cases-grid {
        grid-template-columns: 1fr;
        gap: 36px;
      }
      .features-grid,
      .solutions-grid,
      .tech-grid,
      .testimonials-grid,
      .pricing-grid,
      .news-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .pricing-card.popular {
        transform: none;
      }
      .metrics-flex {
        grid-template-columns: repeat(2, 1fr);
        gap: 24px;
      }
      .footer-grid {
        grid-template-columns: 1fr 1fr;
      }
    }

    @media (max-width: 768px) {
      .menu-toggle {
        display: block;
      }
      .nav-links {
        display: none;
        position: absolute;
        top: 72px;
        left: 0;
        width: 100%;
        background-color: #FFFFFF;
        flex-direction: column;
        padding: 20px;
        box-shadow: var(--shadow-md);
        border-bottom: 1px solid var(--border);
        gap: 16px;
      }
      .nav-links.active {
        display: flex;
      }
      .header-cta .btn {
        display: none;
      }
      .hero-title {
        font-size: 30px;
      }
      .section-title {
        font-size: 24px;
      }
      .section-wrap {
        padding: 56px 0;
      }
      .features-grid,
      .solutions-grid,
      .tech-grid,
      .testimonials-grid,
      .pricing-grid,
      .news-grid {
        grid-template-columns: 1fr;
      }
      .metrics-flex {
        grid-template-columns: 1fr;
      }
      .footer-grid {
        grid-template-columns: 1fr;
        gap: 30px;
      }
      .footer-bottom {
        flex-direction: column;
        text-align: center;
      }
    }