/* roulang page: index */
:root {
      --primary: #0A5F6F;
      --primary-hover: #084c59;
      --secondary: #0F2B48;
      --accent: #D97706;
      --accent-hover: #b45309;
      --bg-sterile: #F8FAFC;
      --bg-card: #FFFFFF;
      --bg-soft: #F1F5F9;
      --dark-navy: #071828;
      --text-main: #1E293B;
      --text-muted: #64748B;
      --border-color: #E2E8F0;
      --radius-sm: 6px;
      --radius-md: 10px;
      --radius-lg: 14px;
      --shadow-soft: 0 4px 20px -2px rgba(10, 95, 111, 0.08);
      --shadow-hover: 0 10px 25px -4px rgba(10, 95, 111, 0.16);
      --font-stack: "PingFang SC", "Microsoft YaHei", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, 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);
      background-color: var(--bg-sterile);
      color: var(--text-main);
      line-height: 1.75;
      -webkit-font-smoothing: antialiased;
      overflow-x: hidden;
    }
    a {
      color: inherit;
      text-decoration: none;
      transition: color 0.2s ease;
    }
    img {
      max-width: 100%;
      height: auto;
      display: block;
    }
    button, input, select, textarea {
      font-family: inherit;
    }
    .container {
      width: 100%;
      max-width: 1240px;
      margin-left: auto;
      margin-right: auto;
      padding-left: 20px;
      padding-right: 20px;
    }
    /* 顶部服务栏 */
    .top-bar {
      background-color: #EBF1F5;
      color: var(--secondary);
      font-size: 13px;
      line-height: 38px;
      border-bottom: 1px solid var(--border-color);
    }
    .top-bar-inner {
      display: flex;
      justify-content: space-between;
      align-items: center;
      flex-wrap: wrap;
    }
    .top-bar-badge {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      font-weight: 500;
    }
    .top-bar-badge span.dot {
      width: 7px;
      height: 7px;
      background: var(--primary);
      border-radius: 50%;
    }
    .top-bar-contact {
      display: flex;
      gap: 20px;
      color: var(--text-muted);
    }
    /* 主导航 */
    .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-color);
      box-shadow: 0 2px 12px rgba(0,0,0,0.03);
    }
    .nav-container {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 72px;
    }
    .brand-logo {
      display: flex;
      align-items: center;
      gap: 12px;
      font-size: 20px;
      font-weight: 700;
      color: var(--secondary);
      letter-spacing: -0.5px;
    }
    .brand-logo .logo-icon {
      width: 38px;
      height: 38px;
      background: linear-gradient(135deg, var(--primary), var(--secondary));
      border-radius: var(--radius-sm);
      display: flex;
      align-items: center;
      justify-content: center;
      color: #fff;
      font-weight: 800;
      font-size: 18px;
    }
    .nav-menu {
      display: flex;
      align-items: center;
      gap: 28px;
      list-style: none;
    }
    .nav-item a {
      font-size: 15px;
      font-weight: 500;
      color: var(--text-main);
      padding: 8px 4px;
      position: relative;
    }
    .nav-item a:hover {
      color: var(--primary);
    }
    .nav-item a::after {
      content: "";
      position: absolute;
      bottom: 0;
      left: 0;
      width: 0;
      height: 2px;
      background: var(--primary);
      transition: width 0.25s ease;
    }
    .nav-item a:hover::after {
      width: 100%;
    }
    .nav-cta-btn {
      background-color: var(--primary);
      color: #FFFFFF;
      padding: 10px 20px;
      border-radius: var(--radius-sm);
      font-size: 14px;
      font-weight: 600;
      border: 1px solid transparent;
      display: inline-flex;
      align-items: center;
      gap: 6px;
      transition: all 0.25s ease;
    }
    .nav-cta-btn:hover {
      background-color: var(--primary-hover);
      transform: translateY(-2px);
      box-shadow: 0 4px 14px rgba(10,95,111,0.25);
    }
    .mobile-toggle {
      display: none;
      background: none;
      border: none;
      font-size: 24px;
      color: var(--secondary);
      cursor: pointer;
    }
    /* 公共 Section 规范 */
    .section-wrap {
      padding: 72px 0;
      position: relative;
    }
    .section-head {
      margin-bottom: 48px;
      max-width: 820px;
    }
    .section-head.center {
      text-align: center;
      margin-left: auto;
      margin-right: auto;
    }
    .section-tag {
      display: inline-block;
      font-size: 13px;
      font-weight: 600;
      color: var(--primary);
      background: #E6F3F5;
      padding: 4px 12px;
      border-radius: var(--radius-sm);
      margin-bottom: 12px;
      letter-spacing: 0.5px;
    }
    .section-tag.dark {
      background: rgba(10, 95, 111, 0.25);
      color: #5EEAD4;
      border: 1px solid rgba(94, 234, 212, 0.3);
    }
    .section-title {
      font-size: 30px;
      line-height: 1.35;
      font-weight: 700;
      color: var(--secondary);
      margin-bottom: 14px;
      letter-spacing: -0.5px;
    }
    .section-desc {
      font-size: 15px;
      color: var(--text-muted);
      line-height: 1.75;
    }
    /* 1. 首屏 Banner 轮播区 (Hero) */
    .hero-section {
      position: relative;
      background: radial-gradient(circle at 85% 20%, rgba(10,95,111,0.12) 0%, rgba(248,250,252,0) 65%), #F8FAFC;
      border-bottom: 1px solid var(--border-color);
      overflow: hidden;
      padding: 56px 0 64px 0;
    }
    .hero-grid {
      display: grid;
      grid-template-columns: 1.15fr 0.85fr;
      gap: 40px;
      align-items: center;
    }
    .hero-content {
      z-index: 2;
    }
    .hero-h1 {
      font-size: 40px;
      line-height: 1.25;
      font-weight: 800;
      color: var(--secondary);
      margin-bottom: 20px;
      letter-spacing: -0.8px;
    }
    .hero-h1 span.highlight {
      color: var(--primary);
    }
    .hero-lead {
      font-size: 16px;
      color: #475569;
      line-height: 1.8;
      margin-bottom: 30px;
    }
    .hero-actions {
      display: flex;
      flex-wrap: wrap;
      gap: 16px;
      margin-bottom: 34px;
    }
    .btn-main {
      background-color: var(--primary);
      color: #FFFFFF;
      padding: 13px 28px;
      font-size: 15px;
      font-weight: 600;
      border-radius: var(--radius-sm);
      display: inline-flex;
      align-items: center;
      gap: 8px;
      box-shadow: 0 4px 16px rgba(10,95,111,0.22);
      transition: all 0.25s ease;
      border: 1px solid transparent;
    }
    .btn-main:hover {
      background-color: var(--primary-hover);
      transform: translateY(-2px);
    }
    .btn-sub {
      background-color: #FFFFFF;
      color: var(--secondary);
      padding: 13px 28px;
      font-size: 15px;
      font-weight: 600;
      border-radius: var(--radius-sm);
      display: inline-flex;
      align-items: center;
      gap: 8px;
      border: 1px solid var(--border-color);
      transition: all 0.25s ease;
    }
    .btn-sub:hover {
      border-color: var(--primary);
      color: var(--primary);
      transform: translateY(-2px);
    }
    .trust-badges {
      display: flex;
      align-items: center;
      gap: 20px;
      font-size: 13px;
      color: var(--text-muted);
      border-top: 1px solid #E2E8F0;
      padding-top: 20px;
    }
    .trust-badge-item {
      display: flex;
      align-items: center;
      gap: 6px;
    }
    .hero-stage {
      position: relative;
    }
    .hero-img-box {
      border-radius: var(--radius-md);
      overflow: hidden;
      box-shadow: 0 12px 35px -8px rgba(15,43,72,0.18);
      border: 1px solid #CBD5E1;
      position: relative;
    }
    .hero-floating-card {
      position: absolute;
      bottom: -18px;
      left: -18px;
      background: #FFFFFF;
      padding: 16px 20px;
      border-radius: var(--radius-sm);
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-hover);
      max-width: 250px;
    }
    .floating-card-num {
      font-size: 24px;
      font-weight: 800;
      color: var(--accent);
      line-height: 1.2;
    }
    .floating-card-text {
      font-size: 12px;
      color: var(--text-muted);
      margin-top: 4px;
    }
    /* 路线图节点条 */
    .hero-timeline-bar {
      margin-top: 40px;
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 18px 24px;
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 16px;
    }
    .timeline-node {
      border-left: 3px solid var(--primary);
      padding-left: 12px;
    }
    .timeline-ver {
      font-size: 12px;
      font-weight: 700;
      color: var(--primary);
      text-transform: uppercase;
    }
    .timeline-desc {
      font-size: 13px;
      color: var(--text-main);
      margin-top: 2px;
      font-weight: 500;
    }
    /* 2. 品牌与技术演进介绍区 */
    .evolution-grid {
      display: grid;
      grid-template-columns: 1fr 1.1fr;
      gap: 48px;
      align-items: center;
    }
    .tech-specs-list {
      display: flex;
      flex-direction: column;
      gap: 20px;
      margin-top: 24px;
    }
    .tech-spec-item {
      display: flex;
      gap: 16px;
      background: #FFFFFF;
      padding: 18px;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-soft);
      transition: transform 0.2s ease;
    }
    .tech-spec-item:hover {
      transform: translateY(-2px);
    }
    .spec-icon-badge {
      width: 44px;
      height: 44px;
      flex-shrink: 0;
      background: #E6F3F5;
      color: var(--primary);
      border-radius: var(--radius-sm);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      font-size: 18px;
    }
    .spec-body h3 {
      font-size: 16px;
      color: var(--secondary);
      font-weight: 700;
      margin-bottom: 4px;
    }
    .spec-body p {
      font-size: 13.5px;
      color: var(--text-muted);
      line-height: 1.6;
    }
    /* 3. 核心优势矩阵区 */
    .advantages-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .adv-card {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 28px 24px;
      box-shadow: var(--shadow-soft);
      transition: all 0.25s ease;
      position: relative;
    }
    .adv-card:hover {
      transform: translateY(-3px);
      box-shadow: var(--shadow-hover);
      border-color: #CBD5E1;
    }
    .adv-num {
      position: absolute;
      top: 20px;
      right: 20px;
      font-size: 22px;
      font-weight: 800;
      color: #E2E8F0;
    }
    .adv-card h3 {
      font-size: 17px;
      color: var(--secondary);
      font-weight: 700;
      margin-bottom: 10px;
    }
    .adv-card p {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.7;
    }
    /* 4. 热门手术机器人产品矩阵区 */
    .products-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }
    .product-card {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      overflow: hidden;
      box-shadow: var(--shadow-soft);
      display: flex;
      flex-direction: column;
      transition: all 0.25s ease;
    }
    .product-card:hover {
      transform: translateY(-3px);
      box-shadow: var(--shadow-hover);
    }
    .prod-img-box {
      height: 220px;
      position: relative;
      background: #E2E8F0;
      overflow: hidden;
    }
    .prod-img-box img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: transform 0.4s ease;
    }
    .product-card:hover .prod-img-box img {
      transform: scale(1.04);
    }
    .prod-body {
      padding: 24px;
      display: flex;
      flex-direction: column;
      flex-grow: 1;
    }
    .prod-model-tag {
      font-size: 12px;
      font-weight: 700;
      color: var(--primary);
      text-transform: uppercase;
      letter-spacing: 0.5px;
    }
    .prod-title {
      font-size: 19px;
      font-weight: 700;
      color: var(--secondary);
      margin: 6px 0 14px 0;
    }
    .prod-specs {
      background: var(--bg-soft);
      border-radius: var(--radius-sm);
      padding: 12px 14px;
      margin-bottom: 20px;
      display: flex;
      flex-direction: column;
      gap: 8px;
    }
    .prod-spec-row {
      display: flex;
      justify-content: space-between;
      font-size: 13px;
    }
    .prod-spec-label {
      color: var(--text-muted);
    }
    .prod-spec-val {
      color: var(--secondary);
      font-weight: 600;
    }
    .prod-btn {
      margin-top: auto;
      display: inline-flex;
      align-items: center;
      justify-content: space-between;
      font-size: 14px;
      font-weight: 600;
      color: var(--primary);
      border: 1px solid #CBD5E1;
      padding: 10px 16px;
      border-radius: var(--radius-sm);
      transition: all 0.2s ease;
    }
    .prod-btn:hover {
      background: var(--primary);
      color: #FFFFFF;
      border-color: var(--primary);
    }
    /* 5. 深色硬核临床理念区 */
    .dark-section {
      background-color: var(--dark-navy);
      color: #FFFFFF;
      position: relative;
      background-image: radial-gradient(circle at 10% 20%, rgba(10,95,111,0.2) 0%, transparent 50%),
                        radial-gradient(circle at 90% 80%, rgba(10,95,111,0.15) 0%, transparent 50%);
    }
    .dark-section .section-title {
      color: #F8FAFC;
    }
    .dark-section .section-desc {
      color: #94A3B8;
    }
    .philosophy-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
      margin-top: 40px;
    }
    .philo-card {
      background: rgba(255, 255, 255, 0.04);
      border: 1px solid rgba(255, 255, 255, 0.08);
      border-radius: var(--radius-md);
      padding: 30px 24px;
      transition: all 0.25s ease;
    }
    .philo-card:hover {
      background: rgba(255, 255, 255, 0.07);
      border-color: rgba(94, 234, 212, 0.3);
      transform: translateY(-3px);
    }
    .philo-step {
      font-size: 13px;
      color: var(--accent);
      font-weight: 700;
      margin-bottom: 8px;
    }
    .philo-card h3 {
      font-size: 18px;
      color: #FFFFFF;
      margin-bottom: 12px;
      font-weight: 700;
    }
    .philo-card p {
      font-size: 14px;
      color: #94A3B8;
      line-height: 1.7;
    }
    /* 6. 临床应用与学术案例墙 */
    .cases-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
    }
    .case-card {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      overflow: hidden;
      box-shadow: var(--shadow-soft);
      display: flex;
      flex-direction: column;
    }
    .case-img-box {
      height: 160px;
      position: relative;
    }
    .case-img-box img {
      width: 100%;
      height: 100%;
      object-fit: cover;
    }
    .case-dept-tag {
      position: absolute;
      top: 12px;
      left: 12px;
      background: rgba(15, 43, 72, 0.85);
      color: #FFFFFF;
      font-size: 11px;
      padding: 3px 8px;
      border-radius: 4px;
    }
    .case-body {
      padding: 18px;
      display: flex;
      flex-direction: column;
      flex-grow: 1;
    }
    .case-title {
      font-size: 15px;
      font-weight: 700;
      color: var(--secondary);
      margin-bottom: 10px;
      line-height: 1.4;
    }
    .case-data-badge {
      display: flex;
      justify-content: space-between;
      border-top: 1px dashed var(--border-color);
      padding-top: 10px;
      margin-top: auto;
      font-size: 12.5px;
    }
    .data-metric {
      color: var(--primary);
      font-weight: 700;
    }
    /* 7. 关键临床数据统计条 */
    .stats-section {
      background: #FFFFFF;
      border-top: 1px solid var(--border-color);
      border-bottom: 1px solid var(--border-color);
      padding: 50px 0;
    }
    .stats-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
      text-align: center;
    }
    .stat-item {
      padding: 0 16px;
      border-right: 1px solid var(--border-color);
    }
    .stat-item:last-child {
      border-right: none;
    }
    .stat-number {
      font-size: 38px;
      line-height: 1.1;
      font-weight: 800;
      color: var(--primary);
      font-variant-numeric: tabular-nums;
      margin-bottom: 6px;
    }
    .stat-label {
      font-size: 14px;
      color: var(--text-main);
      font-weight: 600;
    }
    .stat-desc {
      font-size: 12px;
      color: var(--text-muted);
      margin-top: 4px;
    }
    /* 8. 顶尖外科专家与临床评价区 */
    .testimonials-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .review-card {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 26px;
      box-shadow: var(--shadow-soft);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }
    .review-quote {
      font-size: 14.5px;
      color: #334155;
      line-height: 1.7;
      margin-bottom: 20px;
      font-style: normal;
    }
    .review-author {
      display: flex;
      align-items: center;
      gap: 12px;
      border-top: 1px solid #F1F5F9;
      padding-top: 16px;
    }
    .author-avatar {
      width: 44px;
      height: 44px;
      border-radius: 50%;
      background: #E2E8F0;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      color: var(--primary);
      font-size: 14px;
    }
    .author-info h4 {
      font-size: 15px;
      font-weight: 700;
      color: var(--secondary);
    }
    .author-info p {
      font-size: 12px;
      color: var(--text-muted);
    }
    /* 9. 行业洞察与学术动态摘要区 */
    .news-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .news-card {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      overflow: hidden;
      box-shadow: var(--shadow-soft);
      display: flex;
      flex-direction: column;
    }
    .news-img-box {
      height: 180px;
      position: relative;
      background: #E2E8F0;
    }
    .news-img-box img {
      width: 100%;
      height: 100%;
      object-fit: cover;
    }
    .news-body {
      padding: 22px;
      display: flex;
      flex-direction: column;
      flex-grow: 1;
    }
    .news-meta {
      display: flex;
      align-items: center;
      gap: 12px;
      font-size: 12px;
      color: var(--text-muted);
      margin-bottom: 10px;
    }
    .news-meta-tag {
      color: var(--primary);
      font-weight: 600;
      background: #E6F3F5;
      padding: 2px 8px;
      border-radius: var(--radius-sm);
    }
    .news-title {
      font-size: 16px;
      font-weight: 700;
      color: var(--secondary);
      line-height: 1.45;
      margin-bottom: 8px;
    }
    .news-excerpt {
      font-size: 13.5px;
      color: var(--text-muted);
      line-height: 1.65;
    }
    /* 10. 采购与装机常见问答区 */
    .faq-container {
      max-width: 860px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      gap: 14px;
    }
    .faq-item {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      overflow: hidden;
      box-shadow: var(--shadow-soft);
      transition: border-color 0.2s ease;
    }
    .faq-item[open] {
      border-color: #CBD5E1;
    }
    .faq-summary {
      padding: 20px 24px;
      font-size: 16px;
      font-weight: 700;
      color: var(--secondary);
      cursor: pointer;
      display: flex;
      align-items: center;
      justify-content: space-between;
      user-select: none;
    }
    .faq-summary::-webkit-details-marker {
      display: none;
    }
    .faq-summary::after {
      content: "+";
      font-size: 20px;
      font-weight: 400;
      color: var(--primary);
      transition: transform 0.2s ease;
    }
    .faq-item[open] .faq-summary::after {
      content: "−";
    }
    .faq-content {
      padding: 0 24px 22px 24px;
      font-size: 14.5px;
      color: #475569;
      line-height: 1.75;
      border-top: 1px solid #F1F5F9;
      padding-top: 16px;
    }
    /* 11. 终极行动转化与技术保障区 */
    .contact-wrap {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      overflow: hidden;
      box-shadow: var(--shadow-hover);
      display: grid;
      grid-template-columns: 1fr 1.2fr;
    }
    .contact-benefits {
      background: linear-gradient(145deg, var(--secondary), #071828);
      color: #FFFFFF;
      padding: 44px;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }
    .benefit-group h3 {
      font-size: 22px;
      font-weight: 700;
      margin-bottom: 12px;
      color: #FFFFFF;
    }
    .benefit-group p {
      font-size: 14px;
      color: #94A3B8;
      line-height: 1.7;
      margin-bottom: 28px;
    }
    .benefit-list {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 16px;
    }
    .benefit-list li {
      display: flex;
      align-items: flex-start;
      gap: 12px;
      font-size: 14px;
      color: #E2E8F0;
    }
    .benefit-list .bullet {
      width: 18px;
      height: 18px;
      border-radius: 50%;
      background: var(--primary);
      color: #FFFFFF;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 11px;
      flex-shrink: 0;
      margin-top: 3px;
    }
    .contact-form-side {
      padding: 44px;
      background: #FFFFFF;
    }
    .form-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 18px;
      margin-top: 20px;
    }
    .form-group.full {
      grid-column: span 2;
    }
    .form-group label {
      display: block;
      font-size: 13.5px;
      font-weight: 600;
      color: var(--secondary);
      margin-bottom: 6px;
    }
    .form-control {
      width: 100%;
      padding: 11px 14px;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-sm);
      font-size: 14px;
      color: var(--text-main);
      background-color: var(--bg-sterile);
      transition: all 0.2s ease;
    }
    .form-control:focus {
      outline: none;
      border-color: var(--primary);
      background-color: #FFFFFF;
      box-shadow: 0 0 0 3px rgba(10, 95, 111, 0.12);
    }
    .radio-pill-group {
      display: flex;
      gap: 10px;
      flex-wrap: wrap;
      margin-top: 6px;
    }
    .radio-label {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      font-size: 13px;
      color: var(--text-main);
      cursor: pointer;
      background: var(--bg-soft);
      padding: 8px 14px;
      border-radius: var(--radius-sm);
      border: 1px solid var(--border-color);
    }
    .btn-submit {
      width: 100%;
      background: var(--primary);
      color: #FFFFFF;
      border: none;
      padding: 14px;
      font-size: 15px;
      font-weight: 700;
      border-radius: var(--radius-sm);
      cursor: pointer;
      margin-top: 10px;
      transition: all 0.25s ease;
    }
    .btn-submit:hover {
      background: var(--primary-hover);
      box-shadow: 0 4px 14px rgba(10,95,111,0.3);
    }
    /* 页脚 */
    .site-footer {
      background-color: var(--dark-navy);
      color: #94A3B8;
      font-size: 14px;
      border-top: 1px solid rgba(255,255,255,0.08);
      padding-top: 64px;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 1.5fr 1fr 1fr 1.2fr;
      gap: 40px;
      padding-bottom: 50px;
      border-bottom: 1px solid rgba(255,255,255,0.08);
    }
    .footer-brand h4 {
      color: #FFFFFF;
      font-size: 20px;
      font-weight: 700;
      margin-bottom: 14px;
      display: flex;
      align-items: center;
      gap: 8px;
    }
    .footer-brand p {
      font-size: 13.5px;
      line-height: 1.8;
      color: #94A3B8;
    }
    .footer-col h5 {
      color: #FFFFFF;
      font-size: 15px;
      font-weight: 700;
      margin-bottom: 18px;
      position: relative;
    }
    .footer-links {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }
    .footer-links a {
      color: #94A3B8;
      transition: color 0.2s ease;
    }
    .footer-links a:hover {
      color: #5EEAD4;
    }
    .footer-bottom {
      padding: 24px 0;
      font-size: 12.5px;
      color: #64748B;
      text-align: center;
      display: flex;
      flex-direction: column;
      gap: 6px;
    }
    /* 响应式断点 */
    @media (max-width: 1024px) {
      .hero-grid, .evolution-grid, .contact-wrap {
        grid-template-columns: 1fr;
      }
      .advantages-grid, .products-grid, .philosophy-grid, .testimonials-grid, .news-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .cases-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .hero-timeline-bar {
        grid-template-columns: repeat(2, 1fr);
      }
      .footer-grid {
        grid-template-columns: repeat(2, 1fr);
      }
    }
    @media (max-width: 768px) {
      .top-bar { display: none; }
      .mobile-toggle { display: block; }
      .nav-menu {
        display: none;
        position: absolute;
        top: 72px;
        left: 0;
        right: 0;
        background: #FFFFFF;
        flex-direction: column;
        padding: 20px;
        border-bottom: 1px solid var(--border-color);
        box-shadow: 0 10px 20px rgba(0,0,0,0.05);
        gap: 16px;
      }
      .nav-menu.active { display: flex; }
      .nav-cta-btn { display: none; }
      .hero-h1 { font-size: 28px; }
      .section-title { font-size: 24px; }
      .advantages-grid, .products-grid, .philosophy-grid, .cases-grid, .testimonials-grid, .news-grid {
        grid-template-columns: 1fr;
      }
      .stats-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 32px 16px;
      }
      .stat-item { border-right: none; }
      .hero-timeline-bar {
        grid-template-columns: 1fr;
      }
      .form-grid {
        grid-template-columns: 1fr;
      }
      .form-group.full {
        grid-column: span 1;
      }
      .contact-benefits, .contact-form-side {
        padding: 26px 20px;
      }
      .footer-grid {
        grid-template-columns: 1fr;
        gap: 30px;
      }
    }