/* roulang page: index */
:root {
      --primary: #0f172a;
      --primary-light: #1e293b;
      --accent: #0d9488;
      --accent-hover: #0f766e;
      --tech-blue: #0284c7;
      --bg-surface: #f8fafc;
      --bg-white: #ffffff;
      --bg-dark: #0b0f19;
      --text-main: #0f172a;
      --text-body: #334155;
      --text-muted: #64748b;
      --border-color: #e2e8f0;
      --border-dark: #1e293b;
      --radius-sm: 6px;
      --radius-md: 12px;
      --radius-lg: 16px;
      --radius-full: 9999px;
      --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
      --shadow-card: 0 10px 30px -10px rgba(15, 23, 42, 0.08);
      --shadow-hover: 0 20px 35px -10px rgba(13, 148, 136, 0.15);
      --container-width: 1240px;
      --transition: all 0.25s ease-in-out;
    }

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

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

    body {
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      line-height: 1.6;
      color: var(--text-body);
      background-color: var(--bg-white);
      -webkit-font-smoothing: antialiased;
      overflow-x: hidden;
    }

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

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

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

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

    /* 顶部信息条 */
    .top-bar {
      background-color: var(--primary);
      color: #94a3b8;
      font-size: 0.8125rem;
      border-bottom: 1px solid rgba(255, 255, 255, 0.08);
      padding: 7px 0;
    }

    .top-bar-inner {
      display: flex;
      justify-content: space-between;
      align-items: center;
    }

    .top-bar-left span {
      display: inline-flex;
      align-items: center;
      gap: 6px;
    }

    .top-bar-left .dot {
      width: 6px;
      height: 6px;
      background-color: var(--accent);
      border-radius: 50%;
      display: inline-block;
    }

    .top-bar-right {
      display: flex;
      align-items: center;
      gap: 18px;
    }

    .top-bar-right a:hover {
      color: #ffffff;
    }

    /* 主导航 */
    .header-main {
      position: sticky;
      top: 0;
      z-index: 99;
      background: rgba(255, 255, 255, 0.95);
      backdrop-filter: blur(12px);
      border-bottom: 1px solid var(--border-color);
      box-shadow: 0 2px 10px rgba(0,0,0,0.02);
    }

    .nav-container {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 72px;
    }

    .brand-logo {
      display: flex;
      align-items: center;
      gap: 10px;
      font-size: 1.25rem;
      font-weight: 700;
      color: var(--primary);
    }

    .brand-badge {
      background: linear-gradient(135deg, var(--tech-blue), var(--accent));
      color: #fff;
      font-size: 0.75rem;
      padding: 3px 7px;
      border-radius: 4px;
      font-weight: 600;
    }

    .nav-menu {
      display: flex;
      align-items: center;
      list-style: none;
      gap: 24px;
    }

    .nav-link {
      font-size: 0.9375rem;
      font-weight: 500;
      color: var(--text-body);
      padding: 6px 2px;
      position: relative;
    }

    .nav-link:hover, .nav-link.active {
      color: var(--accent);
    }

    .nav-link::after {
      content: '';
      position: absolute;
      bottom: 0;
      left: 0;
      width: 0;
      height: 2px;
      background-color: var(--accent);
      transition: var(--transition);
    }

    .nav-link:hover::after, .nav-link.active::after {
      width: 100%;
    }

    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 10px 22px;
      border-radius: var(--radius-full);
      font-weight: 600;
      font-size: 0.9375rem;
      cursor: pointer;
      border: 1px solid transparent;
      transition: var(--transition);
      text-align: center;
      white-space: nowrap;
    }

    .btn-primary {
      background-color: var(--accent);
      color: #ffffff;
      box-shadow: 0 4px 14px rgba(13, 148, 136, 0.3);
    }

    .btn-primary:hover {
      background-color: var(--accent-hover);
      transform: translateY(-1px);
    }

    .btn-secondary {
      background-color: #f1f5f9;
      color: var(--text-main);
      border-color: #cbd5e1;
    }

    .btn-secondary:hover {
      background-color: #e2e8f0;
      color: var(--primary);
    }

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

    .btn-outline:hover {
      background-color: var(--accent);
      color: #ffffff;
    }

    /* Section 通用 */
    .section-wrap {
      padding: clamp(56px, 7vw, 96px) 0;
      position: relative;
    }

    .section-bg-light {
      background-color: var(--bg-surface);
      border-top: 1px solid #f1f5f9;
      border-bottom: 1px solid #f1f5f9;
    }

    .section-bg-dark {
      background-color: var(--bg-dark);
      color: #f8fafc;
    }

    .section-header {
      margin-bottom: 44px;
    }

    .section-header.text-center {
      text-align: center;
      max-width: 820px;
      margin-left: auto;
      margin-right: auto;
    }

    .section-tag {
      display: inline-block;
      font-size: 0.8125rem;
      font-weight: 600;
      color: var(--accent);
      text-transform: uppercase;
      letter-spacing: 0.05em;
      margin-bottom: 10px;
      padding: 3px 10px;
      background-color: rgba(13, 148, 136, 0.1);
      border-radius: var(--radius-sm);
    }

    .section-bg-dark .section-tag {
      background-color: rgba(13, 148, 136, 0.2);
      color: #2dd4bf;
    }

    .section-title {
      font-size: clamp(1.75rem, 3.2vw, 2.35rem);
      font-weight: 800;
      color: var(--primary);
      line-height: 1.28;
      letter-spacing: -0.02em;
      margin-bottom: 16px;
    }

    .section-bg-dark .section-title {
      color: #ffffff;
    }

    .section-desc {
      font-size: 1.05rem;
      color: var(--text-muted);
      line-height: 1.7;
    }

    .section-bg-dark .section-desc {
      color: #94a3b8;
    }

    /* 1. 首屏全宽矮横幅 Hero */
    .hero-strip {
      background-color: #f0fdfa;
      border-bottom: 1px solid #ccfbf1;
      padding: 48px 0;
      position: relative;
    }

    .hero-flex {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 36px;
    }

    .hero-content {
      max-width: 660px;
    }

    .hero-content h1 {
      font-size: clamp(2rem, 3.6vw, 2.75rem);
      font-weight: 800;
      color: var(--primary);
      line-height: 1.25;
      margin-bottom: 14px;
    }

    .hero-content p {
      font-size: 1.05rem;
      color: var(--text-body);
      line-height: 1.7;
      margin-bottom: 24px;
    }

    .hero-actions {
      display: flex;
      gap: 14px;
      align-items: center;
    }

    .hero-media-wrap {
      flex: 1;
      max-width: 480px;
      border-radius: var(--radius-lg);
      overflow: hidden;
      box-shadow: 0 16px 36px rgba(15, 23, 42, 0.12);
      border: 4px solid #ffffff;
    }

    .hero-media-wrap img {
      width: 100%;
      height: 270px;
      object-fit: cover;
    }

    /* 2. 双栏：左侧资讯流 + 右侧热榜/应用入口 */
    .split-layout {
      display: grid;
      grid-template-columns: 7fr 5fr;
      gap: 36px;
      margin-top: 10px;
    }

    .feed-card {
      display: flex;
      gap: 20px;
      padding: 22px;
      background: var(--bg-white);
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
      margin-bottom: 20px;
      transition: var(--transition);
    }

    .feed-card:hover {
      border-color: var(--accent);
      box-shadow: var(--shadow-card);
      transform: translateY(-2px);
    }

    .feed-card img {
      width: 160px;
      height: 110px;
      object-fit: cover;
      border-radius: var(--radius-sm);
      flex-shrink: 0;
    }

    .feed-card-body h3 {
      font-size: 1.15rem;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 8px;
      line-height: 1.4;
    }

    .feed-card-body p {
      font-size: 0.9rem;
      color: var(--text-muted);
      line-height: 1.6;
    }

    .hot-list-wrap {
      background-color: var(--bg-surface);
      border-radius: var(--radius-lg);
      padding: 26px;
      border: 1px solid var(--border-color);
    }

    .hot-list-title {
      font-size: 1.2rem;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 18px;
      display: flex;
      align-items: center;
      gap: 8px;
    }

    .hot-list-title::before {
      content: '';
      width: 4px;
      height: 18px;
      background: var(--accent);
      border-radius: 2px;
    }

    .hot-item {
      display: flex;
      align-items: flex-start;
      gap: 14px;
      padding: 14px 0;
      border-bottom: 1px dashed #cbd5e1;
    }

    .hot-item:last-child {
      border-bottom: none;
    }

    .hot-index {
      width: 24px;
      height: 24px;
      background: #e2e8f0;
      color: var(--text-main);
      font-weight: 700;
      font-size: 0.8125rem;
      display: flex;
      align-items: center;
      justify-content: center;
      border-radius: 4px;
      flex-shrink: 0;
    }

    .hot-item:nth-child(1) .hot-index { background: #fee2e2; color: #dc2626; }
    .hot-item:nth-child(2) .hot-index { background: #ffedd5; color: #ea580c; }
    .hot-item:nth-child(3) .hot-index { background: #fef9c3; color: #ca8a04; }

    .hot-item-content h4 {
      font-size: 0.95rem;
      font-weight: 600;
      color: var(--text-main);
      margin-bottom: 4px;
    }

    .hot-item-content p {
      font-size: 0.85rem;
      color: var(--text-muted);
      line-height: 1.5;
    }

    /* 3. 痛点卡片条 */
    .pain-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
    }

    .pain-card {
      background-color: var(--bg-white);
      border: 1px solid #fed7aa;
      border-radius: var(--radius-md);
      padding: 24px 20px;
      position: relative;
      box-shadow: var(--shadow-sm);
    }

    .pain-badge {
      font-size: 0.75rem;
      font-weight: 700;
      color: #c2410c;
      background: #ffedd5;
      padding: 2px 8px;
      border-radius: 4px;
      display: inline-block;
      margin-bottom: 12px;
    }

    .pain-card h3 {
      font-size: 1.1rem;
      color: var(--text-main);
      margin-bottom: 10px;
    }

    .pain-card p {
      font-size: 0.875rem;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* 4. 解决方案图文交错 */
    .solution-feature {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 48px;
      align-items: center;
    }

    .solution-feature img {
      border-radius: var(--radius-lg);
      box-shadow: var(--shadow-card);
      width: 100%;
      height: 340px;
      object-fit: cover;
    }

    .solution-points {
      list-style: none;
      margin-top: 20px;
    }

    .solution-points li {
      position: relative;
      padding-left: 24px;
      margin-bottom: 14px;
      font-size: 0.95rem;
      color: var(--text-body);
    }

    .solution-points li::before {
      content: '✓';
      position: absolute;
      left: 0;
      top: 0;
      color: var(--accent);
      font-weight: bold;
    }

    /* 5. 研发底座指标 */
    .tech-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .tech-box {
      background: var(--bg-white);
      padding: 28px;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
    }

    .tech-num {
      font-size: 2.25rem;
      font-weight: 800;
      color: var(--tech-blue);
      line-height: 1;
      margin-bottom: 8px;
    }

    .tech-box h3 {
      font-size: 1.15rem;
      margin-bottom: 10px;
      color: var(--text-main);
    }

    .tech-box p {
      font-size: 0.875rem;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* 6. 三联硬件产品矩阵 */
    .product-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }

    .product-card {
      background: var(--bg-white);
      border-radius: var(--radius-lg);
      border: 1px solid var(--border-color);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
      display: flex;
      flex-direction: column;
    }

    .product-card:hover {
      box-shadow: var(--shadow-card);
      transform: translateY(-4px);
      border-color: var(--accent);
    }

    .product-img-wrap {
      height: 220px;
      overflow: hidden;
      position: relative;
    }

    .product-img-wrap img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: transform 0.4s ease;
    }

    .product-card:hover .product-img-wrap img {
      transform: scale(1.05);
    }

    .product-body {
      padding: 24px;
      flex: 1;
      display: flex;
      flex-direction: column;
    }

    .product-model {
      font-size: 0.8125rem;
      font-weight: 700;
      color: var(--accent);
      margin-bottom: 6px;
    }

    .product-title {
      font-size: 1.3rem;
      color: var(--text-main);
      margin-bottom: 12px;
      font-weight: 700;
    }

    .product-desc {
      font-size: 0.9rem;
      color: var(--text-muted);
      line-height: 1.6;
      margin-bottom: 20px;
      flex: 1;
    }

    .product-specs {
      background: var(--bg-surface);
      padding: 12px;
      border-radius: var(--radius-sm);
      margin-bottom: 20px;
      display: flex;
      justify-content: space-between;
      font-size: 0.8125rem;
      color: var(--text-body);
    }

    .product-specs span strong {
      color: var(--primary);
    }

    /* 7. 六联核心优势 */
    .advantage-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .adv-card {
      background: var(--bg-white);
      padding: 26px;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
      transition: var(--transition);
    }

    .adv-card:hover {
      border-color: var(--tech-blue);
      box-shadow: var(--shadow-card);
      transform: translateY(-3px);
    }

    .adv-icon {
      width: 44px;
      height: 44px;
      border-radius: 8px;
      background: rgba(2, 132, 199, 0.1);
      color: var(--tech-blue);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: bold;
      font-size: 1.2rem;
      margin-bottom: 16px;
    }

    .adv-card h3 {
      font-size: 1.15rem;
      color: var(--text-main);
      margin-bottom: 10px;
    }

    .adv-card p {
      font-size: 0.875rem;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* 8. 深色架构区 (沉浸式) */
    .dark-layout {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 48px;
      align-items: center;
    }

    .dark-card-list {
      display: flex;
      flex-direction: column;
      gap: 16px;
    }

    .dark-item {
      background: rgba(255, 255, 255, 0.04);
      border: 1px solid rgba(255, 255, 255, 0.08);
      padding: 20px;
      border-radius: var(--radius-md);
    }

    .dark-item h3 {
      font-size: 1.05rem;
      color: #38bdf8;
      margin-bottom: 6px;
    }

    .dark-item p {
      font-size: 0.875rem;
      color: #94a3b8;
      line-height: 1.6;
    }

    /* 9. 行业落地方案故事区 */
    .case-grid {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 32px;
    }

    .case-card {
      background: var(--bg-white);
      border-radius: var(--radius-lg);
      border: 1px solid var(--border-color);
      overflow: hidden;
      display: flex;
      flex-direction: column;
      box-shadow: var(--shadow-sm);
    }

    .case-card img {
      width: 100%;
      height: 230px;
      object-fit: cover;
    }

    .case-body {
      padding: 26px;
    }

    .case-badge {
      font-size: 0.75rem;
      background: #e0f2fe;
      color: #0369a1;
      padding: 2px 8px;
      border-radius: 4px;
      font-weight: 600;
      margin-bottom: 8px;
      display: inline-block;
    }

    .case-body h3 {
      font-size: 1.25rem;
      color: var(--text-main);
      margin-bottom: 10px;
    }

    .case-body p {
      font-size: 0.9rem;
      color: var(--text-muted);
      line-height: 1.65;
    }

    /* 10. 成果数据条 */
    .stat-band {
      background: linear-gradient(135deg, #0f172a 0%, #1e293b 100%);
      color: #ffffff;
      padding: 50px 0;
      border-radius: var(--radius-lg);
    }

    .stat-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
      text-align: center;
    }

    .stat-item .stat-num {
      font-size: 2.75rem;
      font-weight: 800;
      color: #2dd4bf;
      line-height: 1;
      margin-bottom: 8px;
      font-feature-settings: "tnum";
    }

    .stat-item p {
      font-size: 0.9375rem;
      color: #94a3b8;
    }

    /* 11. 客户证言与口碑评价 */
    .testimonial-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .testimonial-card {
      background: var(--bg-white);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 26px;
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .test-quote {
      font-size: 0.925rem;
      color: var(--text-body);
      line-height: 1.7;
      margin-bottom: 20px;
      position: relative;
    }

    .test-author {
      display: flex;
      align-items: center;
      gap: 12px;
      border-top: 1px solid #f1f5f9;
      padding-top: 14px;
    }

    .test-avatar {
      width: 42px;
      height: 42px;
      border-radius: 50%;
      background: #e2e8f0;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: bold;
      color: var(--primary);
    }

    .test-info h4 {
      font-size: 0.9rem;
      color: var(--text-main);
    }

    .test-info span {
      font-size: 0.8rem;
      color: var(--text-muted);
    }

    /* 12. FAQ 手风琴 */
    .faq-wrapper {
      max-width: 860px;
      margin: 0 auto;
    }

    .faq-item {
      background: var(--bg-white);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      margin-bottom: 14px;
      overflow: hidden;
    }

    .faq-title {
      padding: 18px 24px;
      font-size: 1.05rem;
      font-weight: 700;
      color: var(--text-main);
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      background-color: #ffffff;
      transition: var(--transition);
      user-select: none;
    }

    .faq-title:hover {
      background-color: var(--bg-surface);
      color: var(--accent);
    }

    .faq-icon {
      font-size: 1.25rem;
      color: var(--text-muted);
      transition: transform 0.25s ease;
    }

    .faq-content {
      padding: 0 24px;
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s ease, padding 0.3s ease;
      background-color: var(--bg-surface);
    }

    .faq-content p {
      padding-bottom: 18px;
      font-size: 0.925rem;
      color: var(--text-body);
      line-height: 1.7;
    }

    .faq-item.active .faq-content {
      max-height: 300px;
      padding-top: 14px;
    }

    .faq-item.active .faq-icon {
      transform: rotate(45deg);
      color: var(--accent);
    }

    /* 转化区与预约表单 */
    .cta-banner {
      background: linear-gradient(135deg, #0d9488 0%, #0284c7 100%);
      border-radius: var(--radius-lg);
      padding: 48px;
      color: #ffffff;
      box-shadow: 0 20px 40px -10px rgba(13, 148, 136, 0.3);
    }

    .cta-inner {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 40px;
      align-items: center;
    }

    .cta-text h2 {
      font-size: clamp(1.6rem, 2.8vw, 2.2rem);
      font-weight: 800;
      line-height: 1.3;
      margin-bottom: 14px;
    }

    .cta-text p {
      font-size: 1rem;
      color: #e0f2fe;
      line-height: 1.65;
      margin-bottom: 24px;
    }

    .cta-form-box {
      background: #ffffff;
      padding: 30px;
      border-radius: var(--radius-md);
      color: var(--text-main);
      box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
    }

    .form-group {
      margin-bottom: 16px;
    }

    .form-group label {
      display: block;
      font-size: 0.85rem;
      font-weight: 600;
      margin-bottom: 6px;
      color: var(--text-main);
    }

    .form-control {
      width: 100%;
      padding: 10px 14px;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-sm);
      font-size: 0.9rem;
      outline: none;
      transition: var(--transition);
    }

    .form-control:focus {
      border-color: var(--accent);
      box-shadow: 0 0 0 3px rgba(13, 148, 136, 0.15);
    }

    .form-note {
      font-size: 0.75rem;
      color: var(--text-muted);
      margin-top: 8px;
      text-align: center;
    }

    /* 全局页脚 */
    .site-footer {
      background-color: #0b0f19;
      color: #94a3b8;
      padding-top: 64px;
      border-top: 1px solid #1e293b;
      font-size: 0.875rem;
    }

    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1.2fr 1.4fr;
      gap: 36px;
      margin-bottom: 48px;
    }

    .footer-brand h3 {
      font-size: 1.25rem;
      color: #ffffff;
      margin-bottom: 14px;
      font-weight: 700;
    }

    .footer-brand p {
      line-height: 1.65;
      margin-bottom: 16px;
    }

    .footer-col h4 {
      font-size: 0.95rem;
      color: #ffffff;
      font-weight: 600;
      margin-bottom: 18px;
      border-left: 3px solid var(--accent);
      padding-left: 10px;
    }

    .footer-links {
      list-style: none;
    }

    .footer-links li {
      margin-bottom: 10px;
    }

    .footer-links a:hover {
      color: #ffffff;
      padding-left: 4px;
    }

    .footer-contact li {
      margin-bottom: 10px;
      display: flex;
      gap: 8px;
      align-items: flex-start;
      line-height: 1.5;
    }

    .footer-bottom {
      border-top: 1px solid #1e293b;
      padding: 24px 0;
      text-align: center;
      font-size: 0.8125rem;
      color: #64748b;
    }

    .footer-bottom a {
      color: #94a3b8;
      margin: 0 8px;
    }

    .footer-bottom a:hover {
      color: #ffffff;
    }

    /* 移动端菜单抽屉 */
    .mobile-menu-toggle {
      display: none;
      flex-direction: column;
      gap: 5px;
      background: none;
      border: none;
      cursor: pointer;
      padding: 6px;
    }

    .mobile-menu-toggle span {
      display: block;
      width: 24px;
      height: 2px;
      background-color: var(--primary);
      transition: var(--transition);
    }

    /* 响应式断点适配 */
    @media (max-width: 1024px) {
      .split-layout {
        grid-template-columns: 1fr;
      }
      .pain-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .product-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .advantage-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .footer-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .dark-layout {
        grid-template-columns: 1fr;
      }
    }

    @media (max-width: 768px) {
      .top-bar {
        display: none;
      }
      .nav-menu {
        display: none;
      }
      .mobile-menu-toggle {
        display: flex;
      }
      .nav-menu.open {
        display: flex;
        flex-direction: column;
        position: absolute;
        top: 72px;
        left: 0;
        right: 0;
        background: #ffffff;
        padding: 20px;
        border-bottom: 1px solid var(--border-color);
        box-shadow: 0 10px 25px rgba(0,0,0,0.1);
        gap: 16px;
      }
      .hero-flex {
        flex-direction: column;
        text-align: left;
      }
      .hero-media-wrap {
        width: 100%;
        max-width: 100%;
      }
      .solution-feature {
        grid-template-columns: 1fr;
      }
      .tech-grid {
        grid-template-columns: 1fr;
      }
      .product-grid {
        grid-template-columns: 1fr;
      }
      .advantage-grid {
        grid-template-columns: 1fr;
      }
      .case-grid {
        grid-template-columns: 1fr;
      }
      .stat-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 20px;
      }
      .testimonial-grid {
        grid-template-columns: 1fr;
      }
      .cta-inner {
        grid-template-columns: 1fr;
      }
      .footer-grid {
        grid-template-columns: 1fr;
      }
      .feed-card {
        flex-direction: column;
      }
      .feed-card img {
        width: 100%;
        height: 160px;
      }
    }

    @media (max-width: 520px) {
      .pain-grid {
        grid-template-columns: 1fr;
      }
      .stat-grid {
        grid-template-columns: 1fr;
      }
      .hero-actions {
        flex-direction: column;
        width: 100%;
      }
      .hero-actions .btn {
        width: 100%;
      }
    }