:root {
      --primary: #7c3aed;
      --primary-hover: #6d28d9;
      --primary-light: #ede9fe;
      --primary-gradient: linear-gradient(135deg, #7c3aed 0%, #9333ea 50%, #c026d3 100%);
      --accent: #ec4899;
      --bg-base: #faf8ff;
      --bg-card: #ffffff;
      --bg-soft: #f5f3ff;
      --border-color: #e9d5ff;
      --border-light: #f3e8ff;
      --text-main: #1e1b4b;
      --text-muted: #4b5563;
      --text-light: #6b7280;
      --shadow-sm: 0 2px 8px rgba(124, 58, 237, 0.06);
      --shadow-md: 0 8px 24px rgba(124, 58, 237, 0.1);
      --shadow-lg: 0 16px 36px rgba(124, 58, 237, 0.14);
      --radius-sm: 8px;
      --radius-md: 14px;
      --radius-lg: 20px;
      --max-width: 1200px;
    }

    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
      -webkit-tap-highlight-color: transparent;
    }

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

    body {
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      background-color: var(--bg-base);
      color: var(--text-main);
      line-height: 1.65;
      overflow-x: hidden;
    }

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

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

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

    /* 顶部导航 */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(255, 255, 255, 0.95);
      backdrop-filter: blur(12px);
      border-bottom: 1px solid var(--border-light);
      box-shadow: 0 2px 12px rgba(124, 58, 237, 0.05);
    }

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

    .brand-group {
      display: flex;
      align-items: center;
      gap: 12px;
    }

    .brand-logo-wrap {
      width: 42px;
      height: 42px;
      display: flex;
      align-items: center;
      justify-content: center;
    }

    .brand-name-wrap {
      display: flex;
      flex-direction: column;
    }

    .brand-title {
      font-size: 1.25rem;
      font-weight: 800;
      color: var(--primary);
      letter-spacing: 0.5px;
    }

    .brand-sub {
      font-size: 0.72rem;
      color: var(--text-light);
    }

    .nav-links {
      display: flex;
      align-items: center;
      gap: 0;
      list-style: none;
    }

    .nav-links li a {
      font-size: 0.92rem;
      font-weight: 500;
      color: var(--text-main);
      padding: 8px 12px;
      border-radius: var(--radius-sm);
    }

    .nav-links li a:hover {
      color: var(--primary);
      background: var(--primary-light);
    }

    .header-actions {
      display: flex;
      align-items: center;
      gap: 12px;
    }

    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      padding: 10px 22px;
      font-size: 0.95rem;
      font-weight: 600;
      border-radius: 99px;
      cursor: pointer;
      border: 1px solid transparent;
      transition: all 0.25s ease;
      white-space: nowrap;
    }

    .btn-primary {
      background: var(--primary-gradient);
      color: #ffffff;
      box-shadow: 0 4px 14px rgba(124, 58, 237, 0.35);
    }

    .btn-primary:hover {
      transform: translateY(-2px);
      box-shadow: 0 6px 20px rgba(124, 58, 237, 0.45);
      color: #ffffff;
    }

    .btn-outline {
      border-color: var(--primary);
      color: var(--primary);
      background: #ffffff;
    }

    .btn-outline:hover {
      background: var(--primary-light);
      transform: translateY(-2px);
    }

    .btn-lg {
      padding: 14px 34px;
      font-size: 1.05rem;
    }

    .menu-toggle {
      display: none;
      background: none;
      border: none;
      cursor: pointer;
      padding: 8px;
      color: var(--primary);
    }

    /* Section 通用 */
    .section-padding {
      padding: 72px 0;
      position: relative;
    }

    .section-header {
      text-align: center;
      max-width: 760px;
      margin: 0 auto 48px auto;
    }

    .section-badge {
      display: inline-block;
      padding: 4px 14px;
      font-size: 0.8rem;
      font-weight: 600;
      border-radius: 99px;
      background: var(--primary-light);
      color: var(--primary);
      margin-bottom: 12px;
    }

    .section-title {
      font-size: 2rem;
      font-weight: 800;
      color: var(--text-main);
      line-height: 1.35;
      margin-bottom: 12px;
    }

    .section-desc {
      font-size: 1rem;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* 首屏 Hero (无图设计，纯科技质感几何渐变与卡片布局) */
    .hero-section {
      padding: 70px 0 80px 0;
      background: radial-gradient(100% 80% at 50% 0%, #f3e8ff 0%, #faf8ff 70%);
      position: relative;
      overflow: hidden;
    }

    .hero-container {
      position: relative;
      z-index: 2;
    }

    .hero-grid {
      display: grid;
      grid-template-columns: 1.15fr 0.85fr;
      gap: 40px;
      align-items: center;
    }

    .hero-content {
      text-align: left;
    }

    .hero-pill {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 6px 16px;
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: 99px;
      font-size: 0.85rem;
      color: var(--primary);
      font-weight: 600;
      box-shadow: var(--shadow-sm);
      margin-bottom: 20px;
    }

    .hero-pill-dot {
      width: 8px;
      height: 8px;
      background: #10b981;
      border-radius: 50%;
    }

    .hero-h1 {
      font-size: 2.35rem;
      font-weight: 900;
      color: var(--text-main);
      line-height: 1.25;
      margin-bottom: 18px;
      letter-spacing: -0.5px;
    }

    .hero-h1 span {
      background: var(--primary-gradient);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }

    .hero-lead {
      font-size: 1.08rem;
      color: var(--text-muted);
      margin-bottom: 28px;
      line-height: 1.7;
    }

    .hero-cta-group {
      display: flex;
      flex-wrap: wrap;
      gap: 14px;
      margin-bottom: 36px;
    }

    .hero-highlight-bar {
      display: flex;
      flex-wrap: wrap;
      gap: 18px;
      padding-top: 20px;
      border-top: 1px solid var(--border-light);
    }

    .hero-highlight-item {
      display: flex;
      align-items: center;
      gap: 8px;
      font-size: 0.88rem;
      font-weight: 600;
      color: var(--text-main);
    }

    .hero-highlight-icon {
      color: var(--primary);
      display: flex;
    }

    /* 首屏右侧纯 CSS / SVG 科技交互控制台 */
    .hero-visual-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 24px;
      box-shadow: var(--shadow-lg);
      position: relative;
    }

    .visual-head {
      display: flex;
      align-items: center;
      justify-content: space-between;
      border-bottom: 1px solid var(--border-light);
      padding-bottom: 14px;
      margin-bottom: 18px;
    }

    .visual-dots {
      display: flex;
      gap: 6px;
    }

    .visual-dot {
      width: 10px;
      height: 10px;
      border-radius: 50%;
    }

    .vd-red { background: #f87171; }
    .vd-yellow { background: #fbbf24; }
    .vd-green { background: #34d399; }

    .visual-badge {
      font-size: 0.75rem;
      color: var(--primary);
      background: var(--primary-light);
      padding: 2px 10px;
      border-radius: 99px;
      font-weight: 600;
    }

    .visual-models-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 10px;
      margin-bottom: 18px;
    }

    .visual-model-item {
      background: var(--bg-soft);
      border: 1px solid var(--border-light);
      border-radius: var(--radius-sm);
      padding: 10px 8px;
      text-align: center;
      font-size: 0.8rem;
      font-weight: 600;
      color: var(--text-main);
    }

    .visual-model-item span {
      display: block;
      font-size: 0.7rem;
      color: #059669;
      margin-top: 2px;
    }

    .visual-console-box {
      background: #1e1b4b;
      color: #e0e7ff;
      border-radius: var(--radius-md);
      padding: 16px;
      font-family: monospace;
      font-size: 0.82rem;
      line-height: 1.6;
      margin-bottom: 16px;
    }

    .console-line-green { color: #34d399; }
    .console-line-purple { color: #c084fc; }

    .visual-footer-metrics {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 12px;
    }

    .v-metric {
      background: var(--bg-soft);
      border-radius: var(--radius-sm);
      padding: 10px;
      text-align: center;
    }

    .v-metric-num {
      font-size: 1.25rem;
      font-weight: 800;
      color: var(--primary);
    }

    .v-metric-label {
      font-size: 0.75rem;
      color: var(--text-muted);
    }

    /* 数据指标横幅 */
    .metrics-bar-section {
      padding: 30px 0;
      background: #ffffff;
      border-bottom: 1px solid var(--border-light);
    }

    .metrics-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      text-align: center;
    }

    .metric-card {
      padding: 16px;
      border-right: 1px solid var(--border-light);
    }

    .metric-card:last-child {
      border-right: none;
    }

    .metric-val {
      font-size: 2.1rem;
      font-weight: 900;
      color: var(--primary);
      margin-bottom: 4px;
    }

    .metric-desc {
      font-size: 0.9rem;
      color: var(--text-muted);
      font-weight: 500;
    }

    /* 平台核心卡片 Grid */
    .cards-grid-3 {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .cards-grid-4 {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
    }

    .cards-grid-2 {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 24px;
    }

    .feature-card {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 28px 24px;
      box-shadow: var(--shadow-sm);
      transition: all 0.3s ease;
      display: flex;
      flex-direction: column;
      height: 100%;
    }

    .feature-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-md);
      border-color: var(--primary);
    }

    .card-icon-wrap {
      width: 48px;
      height: 48px;
      border-radius: var(--radius-sm);
      background: var(--primary-light);
      color: var(--primary);
      display: flex;
      align-items: center;
      justify-content: center;
      margin-bottom: 18px;
    }

    .card-title {
      font-size: 1.18rem;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 10px;
    }

    .card-desc {
      font-size: 0.92rem;
      color: var(--text-muted);
      line-height: 1.65;
      flex-grow: 1;
    }

    .card-tags {
      display: flex;
      flex-wrap: wrap;
      gap: 6px;
      margin-top: 16px;
    }

    .card-tag {
      font-size: 0.75rem;
      background: var(--bg-soft);
      color: var(--primary);
      padding: 2px 8px;
      border-radius: 4px;
      font-weight: 500;
    }

    /* 场景专区卡片（高密度业务场景） */
    .scenario-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 20px;
    }

    .scenario-item {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 22px;
      transition: all 0.25s ease;
    }

    .scenario-item:hover {
      border-color: var(--primary);
      box-shadow: var(--shadow-md);
    }

    .scenario-header {
      display: flex;
      align-items: center;
      justify-content: space-between;
      margin-bottom: 10px;
    }

    .scenario-name {
      font-size: 1.05rem;
      font-weight: 700;
      color: var(--text-main);
    }

    .scenario-badge {
      font-size: 0.72rem;
      background: #fef2f2;
      color: #ef4444;
      padding: 2px 6px;
      border-radius: 4px;
      font-weight: 600;
    }

    .scenario-body {
      font-size: 0.88rem;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* 多模型生态徽章墙 */
    .model-tags-wall {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      justify-content: center;
      margin-top: 30px;
    }

    .model-badge {
      background: #ffffff;
      border: 1px solid var(--border-color);
      padding: 8px 16px;
      border-radius: 99px;
      font-size: 0.85rem;
      font-weight: 600;
      color: var(--text-main);
      box-shadow: 0 2px 6px rgba(124, 58, 237, 0.04);
      transition: all 0.2s ease;
    }

    .model-badge:hover {
      background: var(--primary);
      color: #ffffff;
      border-color: var(--primary);
    }

    /* 流程步骤 */
    .process-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      position: relative;
    }

    .process-step {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 26px 20px;
      text-align: center;
      position: relative;
    }

    .step-num {
      width: 38px;
      height: 38px;
      line-height: 38px;
      background: var(--primary-gradient);
      color: #ffffff;
      font-weight: 800;
      border-radius: 50%;
      margin: 0 auto 16px auto;
      font-size: 1.1rem;
    }

    .step-title {
      font-size: 1.05rem;
      font-weight: 700;
      margin-bottom: 8px;
      color: var(--text-main);
    }

    .step-desc {
      font-size: 0.86rem;
      color: var(--text-muted);
      line-height: 1.55;
    }

    /* 对比评测表格 */
    .rating-banner {
      background: linear-gradient(135deg, #7c3aed 0%, #4f46e5 100%);
      color: #ffffff;
      border-radius: var(--radius-lg);
      padding: 32px;
      display: flex;
      flex-wrap: wrap;
      align-items: center;
      justify-content: space-between;
      margin-bottom: 32px;
      box-shadow: var(--shadow-md);
    }

    .rating-score-box {
      display: flex;
      align-items: baseline;
      gap: 10px;
    }

    .rating-big {
      font-size: 3.5rem;
      font-weight: 900;
      line-height: 1;
    }

    .rating-stars {
      color: #fbbf24;
      font-size: 1.3rem;
      margin-bottom: 6px;
    }

    .table-container {
      background: #ffffff;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
      overflow-x: auto;
      box-shadow: var(--shadow-sm);
    }

    .compare-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
      min-width: 680px;
    }

    .compare-table th, .compare-table td {
      padding: 16px 20px;
      border-bottom: 1px solid var(--border-light);
      font-size: 0.92rem;
    }

    .compare-table th {
      background: var(--bg-soft);
      font-weight: 700;
      color: var(--text-main);
    }

    .compare-table tr:last-child td {
      border-bottom: none;
    }

    .col-highlight {
      background: #fdfaff;
      font-weight: 700;
      color: var(--primary);
    }

    .check-icon {
      color: #10b981;
      font-weight: bold;
    }

    .cross-icon {
      color: #9ca3af;
    }

    /* 案例中心 */
    .case-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .case-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
      transition: all 0.3s ease;
    }

    .case-card:hover {
      box-shadow: var(--shadow-md);
      transform: translateY(-4px);
    }

    .case-media-box {
      background: var(--bg-soft);
      overflow: hidden;
      display: flex;
      align-items: center;
      justify-content: center;
    }

    .case-content {
      padding: 20px;
    }

    .case-title {
      font-size: 1.08rem;
      font-weight: 700;
      margin-bottom: 8px;
      color: var(--text-main);
    }

    .case-desc {
      font-size: 0.88rem;
      color: var(--text-muted);
      margin-bottom: 14px;
    }

    .case-meta {
      display: flex;
      justify-content: space-between;
      font-size: 0.8rem;
      color: var(--primary);
      font-weight: 600;
    }

    /* 用户评论 */
    .testimonials-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 20px;
    }

    .testimonial-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 24px;
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .testimonial-quote {
      font-size: 0.92rem;
      color: var(--text-main);
      line-height: 1.65;
      margin-bottom: 18px;
    }

    .testimonial-author {
      display: flex;
      align-items: center;
      gap: 12px;
      border-top: 1px solid var(--border-light);
      padding-top: 14px;
    }

    .author-avatar {
      width: 40px;
      height: 40px;
      border-radius: 50%;
      background: var(--primary-light);
      color: var(--primary);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      font-size: 0.9rem;
    }

    .author-name {
      font-size: 0.92rem;
      font-weight: 700;
      color: var(--text-main);
    }

    .author-role {
      font-size: 0.78rem;
      color: var(--text-light);
    }

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

    .faq-item {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-sm);
      overflow: hidden;
      transition: all 0.25s ease;
    }

    .faq-item.active {
      border-color: var(--primary);
      box-shadow: var(--shadow-sm);
    }

    .faq-question {
      width: 100%;
      padding: 18px 22px;
      text-align: left;
      background: none;
      border: none;
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      font-size: 1rem;
      font-weight: 600;
      color: var(--text-main);
    }

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

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

    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s ease;
      background: var(--bg-soft);
    }

    .faq-answer-inner {
      padding: 16px 22px;
      font-size: 0.92rem;
      color: var(--text-muted);
      line-height: 1.65;
    }

    /* 需求匹配与联系我们表单 */
    .contact-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 32px;
      align-items: start;
    }

    .contact-info-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 32px;
      box-shadow: var(--shadow-sm);
    }

    .contact-info-item {
      display: flex;
      align-items: flex-start;
      gap: 14px;
      margin-bottom: 20px;
    }

    .contact-icon {
      width: 36px;
      height: 36px;
      border-radius: 8px;
      background: var(--primary-light);
      color: var(--primary);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: bold;
      flex-shrink: 0;
    }

    .contact-detail-title {
      font-size: 0.85rem;
      color: var(--text-light);
      margin-bottom: 2px;
    }

    .contact-detail-val {
      font-size: 0.98rem;
      font-weight: 600;
      color: var(--text-main);
    }

    .qr-container {
      margin-top: 24px;
      padding-top: 20px;
      border-top: 1px solid var(--border-light);
      display: flex;
      align-items: center;
      gap: 20px;
    }

    .qr-img-box {
      width: 100px;
      height: 100px;
      background: #f3f4f6;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-sm);
      padding: 6px;
      display: flex;
      align-items: center;
      justify-content: center;
    }

    .form-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 32px;
      box-shadow: var(--shadow-md);
    }

    .form-group {
      margin-bottom: 18px;
    }

    .form-label {
      display: block;
      font-size: 0.88rem;
      font-weight: 600;
      color: var(--text-main);
      margin-bottom: 6px;
    }

    .form-control {
      width: 100%;
      padding: 12px 16px;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-sm);
      font-size: 0.92rem;
      color: var(--text-main);
      background: #faf8ff;
      outline: none;
      transition: all 0.2s ease;
    }

    .form-control:focus {
      border-color: var(--primary);
      background: #ffffff;
      box-shadow: 0 0 0 3px rgba(124, 58, 237, 0.15);
    }

    textarea.form-control {
      resize: vertical;
      min-height: 100px;
    }

    /* 资讯与百科文章 */
    .articles-grid {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 24px;
    }

    .article-box {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 24px;
      box-shadow: var(--shadow-sm);
    }

    .article-list {
      list-style: none;
      margin-top: 14px;
      display: flex;
      flex-direction: column;
      gap: 12px;
    }

    .article-list li {
      display: flex;
      align-items: center;
      gap: 8px;
    }

    .article-list a {
      font-size: 0.92rem;
      color: var(--text-main);
      display: inline-block;
      overflow: hidden;
      text-overflow: ellipsis;
      white-space: nowrap;
    }

    .article-list a:hover {
      color: var(--primary);
      padding-left: 4px;
    }

    /* 加盟代理模块 */
    .partner-banner {
      background: linear-gradient(135deg, #1e1b4b 0%, #312e81 100%);
      color: #ffffff;
      border-radius: var(--radius-lg);
      padding: 40px;
      display: grid;
      grid-template-columns: 1.2fr 0.8fr;
      gap: 30px;
      align-items: center;
    }

    .partner-features {
      list-style: none;
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 12px;
      margin-top: 20px;
    }

    .partner-features li {
      font-size: 0.9rem;
      color: #e0e7ff;
      display: flex;
      align-items: center;
      gap: 6px;
    }

    /* 页脚与友情链接 */
    .site-footer {
      background: #ffffff;
      border-top: 1px solid var(--border-light);
      padding: 48px 0 24px 0;
      color: var(--text-muted);
    }

    .footer-top {
      display: grid;
      grid-template-columns: 1.5fr 1fr 1fr 1fr;
      gap: 32px;
      margin-bottom: 36px;
    }

    .footer-col-title {
      font-size: 1rem;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 16px;
    }

    .footer-links {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }

    .footer-links a {
      font-size: 0.88rem;
      color: var(--text-muted);
    }

    .footer-links a:hover {
      color: var(--primary);
    }

    .friend-links-box {
      border-top: 1px solid var(--border-light);
      padding-top: 20px;
      margin-bottom: 24px;
    }

    .friend-links-wrap {
      display: flex;
      flex-wrap: wrap;
      gap: 16px;
      font-size: 0.85rem;
      margin-top: 10px;
    }

    .friend-links-wrap a {
      color: var(--text-light);
    }

    .friend-links-wrap a:hover {
      color: var(--primary);
    }

    .footer-bottom {
      border-top: 1px solid var(--border-light);
      padding-top: 20px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      font-size: 0.82rem;
      color: var(--text-light);
    }

    /* 浮动操作栏与返回顶部 */
    .floating-widget {
      position: fixed;
      right: 20px;
      bottom: 30px;
      z-index: 999;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }

    .float-btn {
      width: 46px;
      height: 46px;
      border-radius: 50%;
      background: #ffffff;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-md);
      display: flex;
      align-items: center;
      justify-content: center;
      color: var(--primary);
      cursor: pointer;
      transition: all 0.2s ease;
      font-size: 1.1rem;
    }

    .float-btn:hover {
      background: var(--primary);
      color: #ffffff;
      transform: scale(1.08);
    }

    /* 响应式断点 */
    @media (max-width: 992px) {
      .hero-grid {
        grid-template-columns: 1fr;
      }
      .cards-grid-3, .scenario-grid, .case-grid, .testimonials-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .cards-grid-4, .process-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .metrics-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .metric-card {
        border-right: none;
        border-bottom: 1px solid var(--border-light);
      }
      .partner-banner {
        grid-template-columns: 1fr;
      }
      .footer-top {
        grid-template-columns: 1fr 1fr;
      }
      .contact-grid {
        grid-template-columns: 1fr;
      }
      .nav-links {
        display: none;
      }
      .menu-toggle {
        display: block;
      }
      .nav-links.mobile-open {
        display: flex;
        flex-direction: column;
        position: absolute;
        top: 72px;
        left: 0;
        right: 0;
        background: #ffffff;
        padding: 16px 20px;
        border-bottom: 1px solid var(--border-color);
        box-shadow: var(--shadow-md);
      }
      .nav-links.mobile-open li {
        width: 100%;
      }
      .nav-links.mobile-open li a {
        display: block;
        padding: 10px 0;
      }
    }

    @media (max-width: 640px) {
      .hero-h1 {
        font-size: 1.75rem;
      }
      .section-title {
        font-size: 1.5rem;
      }
      .cards-grid-3, .cards-grid-2, .cards-grid-4, .scenario-grid, .case-grid, .testimonials-grid, .articles-grid, .process-grid {
        grid-template-columns: 1fr;
      }
      .metrics-grid {
        grid-template-columns: 1fr;
      }
      .footer-top {
        grid-template-columns: 1fr;
      }
      .footer-bottom {
        flex-direction: column;
        gap: 10px;
        text-align: center;
      }
      .rating-banner {
        flex-direction: column;
        align-items: flex-start;
        gap: 16px;
      }
    }