/* roulang page: index */
:root {
      --primary-slate: #0F172A;
      --secondary-slate: #1E293B;
      --terminal-emerald: #059669;
      --bright-emerald: #10B981;
      --alert-amber: #D97706;
      --alert-red: #EF4444;
      --bg-light: #F8FAFC;
      --bg-panel: #FFFFFF;
      --bg-dark: #020617;
      --text-main: #1E293B;
      --text-muted: #64748B;
      --text-light: #F8FAFC;
      --border-color: #E2E8F0;
      --border-dark: #334155;
      --shadow-sm: 0 2px 4px -1px rgba(0, 0, 0, 0.04);
      --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.05), 0 2px 4px -2px rgba(0, 0, 0, 0.05);
      --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.08), 0 4px 6px -2px rgba(0, 0, 0, 0.04);
      --radius-sm: 6px;
      --radius-md: 12px;
      --radius-lg: 16px;
      --transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
    }
    *, *::before, *::after {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }
    html {
      scroll-behavior: smooth;
      font-size: 16px;
    }
    body {
      font-family: system-ui, -apple-system, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      background-color: var(--bg-light);
      color: var(--text-main);
      line-height: 1.75;
      -webkit-font-smoothing: antialiased;
      overflow-x: hidden;
    }
    a {
      color: inherit;
      text-decoration: none;
      transition: var(--transition);
    }
    img {
      max-width: 100%;
      height: auto;
      display: block;
    }
    .container {
      width: 100%;
      max-width: 1280px;
      margin-left: auto;
      margin-right: auto;
      padding-left: 24px;
      padding-right: 24px;
    }
    .badge {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      padding: 4px 12px;
      border-radius: 9999px;
      font-size: 0.8125rem;
      font-weight: 600;
      letter-spacing: -0.01em;
    }
    .badge-emerald {
      background-color: rgba(5, 150, 105, 0.12);
      color: var(--terminal-emerald);
      border: 1px solid rgba(5, 150, 105, 0.25);
    }
    .badge-amber {
      background-color: rgba(217, 119, 6, 0.12);
      color: var(--alert-amber);
      border: 1px solid rgba(217, 119, 6, 0.25);
    }
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      padding: 12px 26px;
      border-radius: var(--radius-sm);
      font-size: 0.9375rem;
      font-weight: 600;
      cursor: pointer;
      border: 1px solid transparent;
      transition: var(--transition);
      text-align: center;
    }
    .btn:hover {
      transform: translateY(-2px);
    }
    .btn-primary {
      background-color: var(--terminal-emerald);
      color: #ffffff;
      box-shadow: 0 4px 12px rgba(5, 150, 105, 0.3);
    }
    .btn-primary:hover {
      background-color: #047857;
      box-shadow: 0 6px 16px rgba(5, 150, 105, 0.4);
    }
    .btn-dark {
      background-color: var(--primary-slate);
      color: #ffffff;
    }
    .btn-dark:hover {
      background-color: #020617;
    }
    .btn-outline {
      border-color: var(--border-color);
      color: var(--text-main);
      background-color: #ffffff;
    }
    .btn-outline:hover {
      background-color: #F1F5F9;
      border-color: #CBD5E1;
    }
    .btn-outline-white {
      border-color: rgba(255, 255, 255, 0.3);
      color: #ffffff;
      background-color: rgba(255, 255, 255, 0.05);
    }
    .btn-outline-white:hover {
      background-color: rgba(255, 255, 255, 0.15);
      border-color: #ffffff;
    }
    .section-header {
      margin-bottom: 48px;
      text-align: center;
    }
    .section-title {
      font-size: 2.125rem;
      font-weight: 800;
      color: var(--primary-slate);
      letter-spacing: -0.02em;
      margin-bottom: 14px;
    }
    .section-subtitle {
      font-size: 1.0625rem;
      color: var(--text-muted);
      max-width: 780px;
      margin-left: auto;
      margin-right: auto;
      line-height: 1.8;
    }
    .section-dark .section-title {
      color: #ffffff;
    }
    .section-dark .section-subtitle {
      color: #94A3B8;
    }

    /* Header & Navigation */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 100;
      background-color: rgba(255, 255, 255, 0.95);
      backdrop-filter: blur(12px);
      border-bottom: 1px solid var(--border-color);
    }
    .top-bar {
      background-color: #F1F5F9;
      border-bottom: 1px solid #E2E8F0;
      font-size: 0.8125rem;
      color: var(--text-muted);
      padding: 6px 0;
    }
    .top-bar-inner {
      display: flex;
      justify-content: space-between;
      align-items: center;
    }
    .main-nav-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 72px;
    }
    .site-logo {
      display: flex;
      align-items: center;
      gap: 10px;
      font-size: 1.375rem;
      font-weight: 800;
      color: var(--primary-slate);
      letter-spacing: -0.02em;
    }
    .logo-badge {
      background: linear-gradient(135deg, var(--terminal-emerald), #047857);
      color: #ffffff;
      padding: 4px 8px;
      border-radius: var(--radius-sm);
      font-size: 0.8125rem;
      font-weight: 700;
    }
    .nav-links {
      display: flex;
      align-items: center;
      list-style: none;
      gap: 28px;
    }
    .nav-link {
      font-size: 0.9375rem;
      font-weight: 600;
      color: var(--text-main);
    }
    .nav-link:hover, .nav-link.active {
      color: var(--terminal-emerald);
    }
    .nav-actions {
      display: flex;
      align-items: center;
      gap: 14px;
    }
    .mobile-menu-btn {
      display: none;
      background: none;
      border: none;
      font-size: 1.5rem;
      cursor: pointer;
      color: var(--primary-slate);
    }

    /* 板块 1: Hero */
    .hero-section {
      position: relative;
      padding: 80px 0 90px;
      background: radial-gradient(circle at 80% 20%, rgba(5, 150, 105, 0.08) 0%, transparent 60%), linear-gradient(180deg, #FFFFFF 0%, var(--bg-light) 100%);
      border-bottom: 1px solid var(--border-color);
      overflow: hidden;
    }
    .hero-grid {
      display: grid;
      grid-template-columns: 1.15fr 0.85fr;
      gap: 48px;
      align-items: center;
    }
    .hero-content h1 {
      font-size: 2.75rem;
      font-weight: 850;
      color: var(--primary-slate);
      line-height: 1.25;
      letter-spacing: -0.03em;
      margin-bottom: 20px;
    }
    .hero-content h1 span {
      color: var(--terminal-emerald);
      position: relative;
    }
    .hero-desc {
      font-size: 1.125rem;
      color: #475569;
      line-height: 1.8;
      margin-bottom: 32px;
      max-width: 620px;
    }
    .hero-cta-group {
      display: flex;
      gap: 16px;
      margin-bottom: 36px;
      flex-wrap: wrap;
    }
    .hero-trust-row {
      display: flex;
      align-items: center;
      gap: 24px;
      padding-top: 24px;
      border-top: 1px solid #E2E8F0;
    }
    .hero-trust-item {
      display: flex;
      align-items: center;
      gap: 8px;
      font-size: 0.875rem;
      font-weight: 600;
      color: var(--text-muted);
    }
    .hero-trust-dot {
      width: 8px;
      height: 8px;
      background-color: var(--bright-emerald);
      border-radius: 50%;
      box-shadow: 0 0 0 3px rgba(16, 185, 129, 0.2);
    }
    .hero-stage {
      position: relative;
      border-radius: var(--radius-lg);
      overflow: hidden;
      box-shadow: var(--shadow-lg);
      border: 1px solid #CBD5E1;
      background-color: #0F172A;
    }
    .hero-stage img {
      width: 100%;
      height: 380px;
      object-fit: cover;
      opacity: 0.92;
      transition: transform 0.6s ease;
    }
    .hero-stage:hover img {
      transform: scale(1.02);
    }
    .hero-telemetry {
      position: absolute;
      bottom: 16px;
      left: 16px;
      right: 16px;
      background: rgba(15, 23, 42, 0.88);
      backdrop-filter: blur(8px);
      border: 1px solid rgba(255, 255, 255, 0.15);
      border-radius: var(--radius-sm);
      padding: 12px 18px;
      color: #E2E8F0;
      font-size: 0.8125rem;
      display: flex;
      justify-content: space-between;
      align-items: center;
    }

    /* 板块 2: 卖点三连 / 产品介绍 */
    .about-features-section {
      padding: 96px 0;
      background-color: #ffffff;
      border-bottom: 1px solid var(--border-color);
    }
    .about-layout {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 56px;
      align-items: center;
    }
    .tech-specs-card {
      background: #F8FAFC;
      border: 1px solid #E2E8F0;
      border-radius: var(--radius-lg);
      padding: 36px;
    }
    .specs-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 20px;
      margin-top: 24px;
    }
    .spec-item {
      background: #FFFFFF;
      padding: 18px;
      border-radius: var(--radius-sm);
      border: 1px solid #E2E8F0;
    }
    .spec-val {
      font-size: 1.5rem;
      font-weight: 800;
      color: var(--primary-slate);
      display: block;
      margin-bottom: 4px;
    }
    .spec-label {
      font-size: 0.8125rem;
      color: var(--text-muted);
    }
    .feature-steps {
      display: flex;
      flex-direction: column;
      gap: 24px;
    }
    .step-card {
      display: flex;
      gap: 20px;
      padding: 24px;
      border-radius: var(--radius-md);
      background-color: #FFFFFF;
      border: 1px solid #E2E8F0;
      transition: var(--transition);
    }
    .step-card:hover {
      border-color: var(--terminal-emerald);
      transform: translateY(-2px);
      box-shadow: var(--shadow-md);
    }
    .step-icon {
      flex-shrink: 0;
      width: 48px;
      height: 48px;
      background: rgba(5, 150, 105, 0.1);
      border-radius: var(--radius-sm);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 800;
      color: var(--terminal-emerald);
      font-size: 1.25rem;
    }
    .step-content h3 {
      font-size: 1.125rem;
      font-weight: 700;
      color: var(--primary-slate);
      margin-bottom: 8px;
    }
    .step-content p {
      font-size: 0.875rem;
      color: var(--text-muted);
      line-height: 1.7;
    }

    /* 板块 3: 核心优势六矩阵 */
    .strengths-section {
      padding: 96px 0;
      background-color: var(--bg-light);
      border-bottom: 1px solid var(--border-color);
    }
    .strengths-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }
    .strength-card {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 32px 28px;
      transition: var(--transition);
      position: relative;
    }
    .strength-card:hover {
      border-color: var(--terminal-emerald);
      box-shadow: var(--shadow-lg);
      transform: translateY(-4px);
    }
    .strength-num {
      position: absolute;
      top: 24px;
      right: 24px;
      font-size: 1.25rem;
      font-weight: 800;
      color: #CBD5E1;
    }
    .strength-card h3 {
      font-size: 1.1875rem;
      font-weight: 700;
      color: var(--primary-slate);
      margin-top: 14px;
      margin-bottom: 10px;
    }
    .strength-card p {
      font-size: 0.875rem;
      color: var(--text-muted);
      line-height: 1.75;
    }

    /* 板块 4: 产品方案矩阵 */
    .products-section {
      padding: 96px 0;
      background-color: #FFFFFF;
      border-bottom: 1px solid var(--border-color);
    }
    .products-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }
    .product-card {
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 36px 30px;
      display: flex;
      flex-direction: column;
      background-color: #FFFFFF;
      transition: var(--transition);
      position: relative;
    }
    .product-card.featured {
      border-color: var(--terminal-emerald);
      box-shadow: 0 10px 25px -5px rgba(5, 150, 105, 0.15);
      transform: scale(1.02);
    }
    .product-card:hover {
      box-shadow: var(--shadow-lg);
    }
    .product-role {
      font-size: 0.8125rem;
      font-weight: 700;
      color: var(--terminal-emerald);
      text-transform: uppercase;
      margin-bottom: 8px;
    }
    .product-title {
      font-size: 1.375rem;
      font-weight: 800;
      color: var(--primary-slate);
      margin-bottom: 12px;
    }
    .product-desc {
      font-size: 0.875rem;
      color: var(--text-muted);
      margin-bottom: 24px;
      line-height: 1.7;
    }
    .product-features {
      list-style: none;
      margin-bottom: 32px;
      flex-grow: 1;
    }
    .product-features li {
      font-size: 0.875rem;
      color: #334155;
      padding: 8px 0;
      border-bottom: 1px dashed #E2E8F0;
      display: flex;
      align-items: center;
      gap: 10px;
    }
    .product-features li::before {
      content: "✓";
      color: var(--terminal-emerald);
      font-weight: 800;
    }

    /* 板块 5: 攻防理念与时序对比 */
    .tech-insights-section {
      padding: 96px 0;
      background-color: var(--bg-dark);
      color: #FFFFFF;
      border-bottom: 1px solid #1E293B;
    }
    .insights-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 48px;
      align-items: center;
    }
    .insights-lead h3 {
      font-size: 1.75rem;
      font-weight: 800;
      margin-bottom: 20px;
      line-height: 1.35;
    }
    .insights-lead p {
      font-size: 0.9375rem;
      color: #94A3B8;
      line-height: 1.85;
      margin-bottom: 28px;
    }
    .timeline-stream {
      display: flex;
      flex-direction: column;
      gap: 18px;
      background-color: rgba(15, 23, 42, 0.7);
      padding: 28px;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-dark);
    }
    .stream-step {
      display: flex;
      gap: 16px;
      position: relative;
    }
    .stream-step:not(:last-child)::after {
      content: "";
      position: absolute;
      top: 32px;
      left: 15px;
      width: 2px;
      height: calc(100% - 10px);
      background-color: var(--border-dark);
    }
    .step-marker {
      width: 32px;
      height: 32px;
      border-radius: 50%;
      background-color: #1E293B;
      color: var(--bright-emerald);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 800;
      font-size: 0.8125rem;
      flex-shrink: 0;
      border: 1px solid #334155;
    }
    .step-detail h4 {
      font-size: 1rem;
      font-weight: 700;
      margin-bottom: 4px;
      color: #F8FAFC;
    }
    .step-detail p {
      font-size: 0.8125rem;
      color: #94A3B8;
      line-height: 1.6;
    }

    /* 板块 6: 行业落地场景与实战 */
    .user-stories-section {
      padding: 96px 0;
      background-color: var(--bg-light);
      border-bottom: 1px solid var(--border-color);
    }
    .stories-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }
    .story-card {
      background: #FFFFFF;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
      padding: 32px 28px;
      display: flex;
      flex-direction: column;
    }
    .story-sector {
      font-size: 0.8125rem;
      font-weight: 700;
      color: var(--alert-amber);
      margin-bottom: 6px;
    }
    .story-title {
      font-size: 1.25rem;
      font-weight: 800;
      color: var(--primary-slate);
      margin-bottom: 18px;
    }
    .story-block {
      margin-bottom: 14px;
    }
    .story-block h5 {
      font-size: 0.8125rem;
      font-weight: 700;
      color: var(--text-muted);
      text-transform: uppercase;
      margin-bottom: 4px;
    }
    .story-block p {
      font-size: 0.875rem;
      color: #334155;
      line-height: 1.65;
    }
    .story-result {
      margin-top: auto;
      padding-top: 16px;
      border-top: 1px solid #F1F5F9;
      font-weight: 700;
      font-size: 0.875rem;
      color: var(--terminal-emerald);
    }

    /* 板块 7: 关键数据度量条 */
    .metrics-section {
      padding: 56px 0;
      background: linear-gradient(135deg, var(--primary-slate) 0%, #0B132B 100%);
      color: #FFFFFF;
      border-bottom: 1px solid #1E293B;
    }
    .metrics-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 32px;
      text-align: center;
    }
    .metric-value {
      font-size: 2.75rem;
      font-weight: 900;
      color: var(--bright-emerald);
      letter-spacing: -0.03em;
      line-height: 1;
      margin-bottom: 8px;
    }
    .metric-label {
      font-size: 0.9375rem;
      font-weight: 600;
      color: #E2E8F0;
      margin-bottom: 4px;
    }
    .metric-sub {
      font-size: 0.8125rem;
      color: #94A3B8;
    }

    /* 板块 8: 社会认同与评价背书 */
    .testimonials-section {
      padding: 96px 0;
      background-color: #FFFFFF;
      border-bottom: 1px solid var(--border-color);
    }
    .testimonials-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }
    .testimonial-card {
      background-color: var(--bg-light);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 32px 28px;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }
    .quote-text {
      font-size: 0.9375rem;
      color: #334155;
      line-height: 1.8;
      margin-bottom: 24px;
      font-style: italic;
    }
    .author-info {
      display: flex;
      align-items: center;
      gap: 14px;
    }
    .author-avatar {
      width: 48px;
      height: 48px;
      border-radius: 50%;
      background-color: #CBD5E1;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 800;
      color: var(--primary-slate);
    }
    .author-name {
      font-size: 0.9375rem;
      font-weight: 700;
      color: var(--primary-slate);
    }
    .author-title {
      font-size: 0.8125rem;
      color: var(--text-muted);
    }

    /* 板块 9: 结构化技术差异对比 */
    .comparison-section {
      padding: 96px 0;
      background-color: var(--bg-light);
      border-bottom: 1px solid var(--border-color);
    }
    .comparison-table-wrapper {
      background: #FFFFFF;
      border-radius: var(--radius-lg);
      border: 1px solid var(--border-color);
      overflow-x: auto;
      box-shadow: var(--shadow-sm);
    }
    .comparison-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
      font-size: 0.9375rem;
    }
    .comparison-table th, .comparison-table td {
      padding: 20px 24px;
      border-bottom: 1px solid var(--border-color);
    }
    .comparison-table th {
      background-color: #F8FAFC;
      color: var(--primary-slate);
      font-weight: 700;
    }
    .comparison-table th.col-highlight {
      background-color: rgba(5, 150, 105, 0.08);
      color: var(--terminal-emerald);
      font-size: 1.0625rem;
    }
    .comparison-table td.col-highlight {
      background-color: rgba(5, 150, 105, 0.03);
      font-weight: 600;
      color: var(--primary-slate);
    }

    /* 板块 10: 资讯动态卡片 */
    .news-section {
      padding: 96px 0;
      background-color: #FFFFFF;
      border-bottom: 1px solid var(--border-color);
    }
    .news-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }
    .news-card {
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      overflow: hidden;
      background-color: #FFFFFF;
      display: flex;
      flex-direction: column;
      transition: var(--transition);
    }
    .news-card:hover {
      box-shadow: var(--shadow-md);
      transform: translateY(-3px);
    }
    .news-img {
      height: 200px;
      width: 100%;
      object-fit: cover;
    }
    .news-body {
      padding: 24px;
      display: flex;
      flex-direction: column;
      flex-grow: 1;
    }
    .news-date {
      font-size: 0.8125rem;
      color: var(--text-muted);
      margin-bottom: 8px;
    }
    .news-body h3 {
      font-size: 1.125rem;
      font-weight: 700;
      color: var(--primary-slate);
      line-height: 1.45;
      margin-bottom: 12px;
    }
    .news-body p {
      font-size: 0.875rem;
      color: var(--text-muted);
      line-height: 1.7;
      margin-bottom: 20px;
    }
    .news-link {
      margin-top: auto;
      font-size: 0.875rem;
      font-weight: 700;
      color: var(--terminal-emerald);
      display: inline-flex;
      align-items: center;
      gap: 6px;
    }

    /* 板块 11: 常见问题 FAQ */
    .faq-section {
      padding: 96px 0;
      background-color: var(--bg-light);
      border-bottom: 1px solid var(--border-color);
    }
    .faq-wrapper {
      max-width: 860px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      gap: 16px;
    }
    .faq-item {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      overflow: hidden;
      transition: var(--transition);
    }
    .faq-item:hover {
      border-color: #CBD5E1;
    }
    .faq-trigger {
      width: 100%;
      padding: 22px 28px;
      text-align: left;
      font-size: 1.0625rem;
      font-weight: 700;
      color: var(--primary-slate);
      background: none;
      border: none;
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
    }
    .faq-arrow {
      font-size: 1.25rem;
      color: var(--text-muted);
      transition: transform 0.25s ease;
    }
    .faq-content {
      padding: 0 28px 24px;
      font-size: 0.9375rem;
      color: #475569;
      line-height: 1.8;
      display: none;
    }
    .faq-item.open .faq-content {
      display: block;
    }
    .faq-item.open .faq-arrow {
      transform: rotate(180deg);
      color: var(--terminal-emerald);
    }

    /* 板块 12: 终极服务保障条 */
    .guarantee-section {
      padding: 56px 0;
      background-color: #FFFFFF;
      border-bottom: 1px solid var(--border-color);
    }
    .guarantee-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 28px;
    }
    .guarantee-item {
      display: flex;
      align-items: center;
      gap: 16px;
    }
    .guarantee-icon {
      width: 44px;
      height: 44px;
      background: rgba(5, 150, 105, 0.1);
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      color: var(--terminal-emerald);
      font-weight: 800;
      flex-shrink: 0;
    }
    .guarantee-text h4 {
      font-size: 0.9375rem;
      font-weight: 700;
      color: var(--primary-slate);
      margin-bottom: 2px;
    }
    .guarantee-text p {
      font-size: 0.8125rem;
      color: var(--text-muted);
    }

    /* 板块 13: 转化表单 */
    .lead-form-section {
      padding: 96px 0;
      background: radial-gradient(circle at top right, rgba(5, 150, 105, 0.05) 0%, transparent 60%), #FFFFFF;
    }
    .form-container {
      max-width: 720px;
      margin: 0 auto;
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 48px;
      box-shadow: var(--shadow-lg);
    }
    .form-row {
      margin-bottom: 20px;
    }
    .form-label {
      display: block;
      font-size: 0.875rem;
      font-weight: 600;
      color: var(--primary-slate);
      margin-bottom: 8px;
    }
    .form-control {
      width: 100%;
      padding: 12px 16px;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-sm);
      font-size: 0.9375rem;
      font-family: inherit;
      color: var(--text-main);
      background-color: #F8FAFC;
      transition: var(--transition);
    }
    .form-control:focus {
      outline: none;
      border-color: var(--terminal-emerald);
      background-color: #FFFFFF;
      box-shadow: 0 0 0 3px rgba(5, 150, 105, 0.15);
    }
    .form-radio-group {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 12px;
    }
    .radio-label {
      display: flex;
      align-items: center;
      gap: 8px;
      padding: 10px 14px;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-sm);
      cursor: pointer;
      font-size: 0.875rem;
      background-color: #F8FAFC;
    }
    .radio-label:hover {
      border-color: #CBD5E1;
    }
    .privacy-notice {
      font-size: 0.8125rem;
      color: var(--text-muted);
      margin-top: 14px;
      text-align: center;
    }

    /* 底部固定转化浮条 */
    .sticky-bar {
      position: fixed;
      bottom: 0;
      left: 0;
      width: 100%;
      background: rgba(15, 23, 42, 0.94);
      backdrop-filter: blur(12px);
      border-top: 1px solid var(--border-dark);
      padding: 14px 0;
      z-index: 99;
      transform: translateY(100%);
      transition: transform 0.3s ease;
    }
    .sticky-bar.visible {
      transform: translateY(0);
    }
    .sticky-bar-inner {
      display: flex;
      justify-content: space-between;
      align-items: center;
    }
    .sticky-bar-text {
      color: #F8FAFC;
      font-size: 0.9375rem;
      font-weight: 600;
    }
    .sticky-bar-text span {
      color: var(--bright-emerald);
      margin-left: 8px;
    }

    /* 页脚 Footer */
    .site-footer {
      background-color: var(--primary-slate);
      color: #94A3B8;
      padding: 80px 0 36px;
      border-top: 1px solid #1E293B;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 1.5fr 1fr 1fr 1fr;
      gap: 48px;
      margin-bottom: 56px;
    }
    .footer-col h4 {
      font-size: 1rem;
      font-weight: 700;
      color: #F8FAFC;
      margin-bottom: 20px;
    }
    .footer-links {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 12px;
    }
    .footer-links a {
      color: #94A3B8;
      font-size: 0.875rem;
    }
    .footer-links a:hover {
      color: #FFFFFF;
    }
    .footer-bottom {
      padding-top: 32px;
      border-top: 1px solid #1E293B;
      font-size: 0.8125rem;
      display: flex;
      justify-content: space-between;
      align-items: center;
      flex-wrap: wrap;
      gap: 16px;
    }
    .footer-bottom a {
      color: #94A3B8;
    }
    .footer-bottom a:hover {
      color: #FFFFFF;
    }

    /* 响应式样式适配 */
    @media (max-width: 1024px) {
      .hero-grid, .about-layout, .insights-grid {
        grid-template-columns: 1fr;
      }
      .strengths-grid, .products-grid, .stories-grid, .news-grid, .testimonials-grid {
        grid-template-columns: 1fr 1fr;
      }
      .metrics-grid, .guarantee-grid {
        grid-template-columns: 1fr 1fr;
      }
      .footer-grid {
        grid-template-columns: 1fr 1fr;
      }
      .hero-content h1 {
        font-size: 2.25rem;
      }
    }
    @media (max-width: 768px) {
      .top-bar {
        display: none;
      }
      .nav-links, .nav-actions .btn-outline {
        display: none;
      }
      .mobile-menu-btn {
        display: block;
      }
      .nav-links.mobile-open {
        display: flex;
        flex-direction: column;
        position: absolute;
        top: 72px;
        left: 0;
        width: 100%;
        background-color: #FFFFFF;
        padding: 24px;
        border-bottom: 1px solid var(--border-color);
        box-shadow: var(--shadow-lg);
        gap: 16px;
      }
      .strengths-grid, .products-grid, .stories-grid, .news-grid, .testimonials-grid {
        grid-template-columns: 1fr;
      }
      .metrics-grid, .guarantee-grid {
        grid-template-columns: 1fr;
        text-align: left;
      }
      .footer-grid {
        grid-template-columns: 1fr;
      }
      .form-radio-group {
        grid-template-columns: 1fr;
      }
      .form-container {
        padding: 28px 20px;
      }
      .hero-content h1 {
        font-size: 1.875rem;
      }
      .section-title {
        font-size: 1.625rem;
      }
      .sticky-bar-text {
        display: none;
      }
      .sticky-bar-inner {
        justify-content: center;
      }
    }