/* CSS Reset & Variables - 渐变青科技风 */
    :root {
      --primary-cyan: #06b6d4;
      --primary-teal: #0d9488;
      --primary-dark: #0f172a;
      --accent-cyan: #0891b2;
      --accent-gradient: linear-gradient(135deg, #06b6d4 0%, #0d9488 50%, #0284c7 100%);
      --hero-bg-gradient: linear-gradient(145deg, #f0fdfa 0%, #e0f2fe 50%, #f8fafc 100%);
      --card-bg: #ffffff;
      --text-main: #0f172a;
      --text-muted: #475569;
      --text-light: #64748b;
      --border-color: #e2e8f0;
      --border-focus: #06b6d4;
      --shadow-sm: 0 1px 3px rgba(0,0,0,0.05);
      --shadow-md: 0 4px 20px -2px rgba(6, 182, 212, 0.08), 0 2px 6px -1px rgba(0,0,0,0.04);
      --shadow-lg: 0 10px 30px -4px rgba(13, 148, 136, 0.12), 0 4px 12px -2px rgba(0,0,0,0.05);
      --radius-sm: 8px;
      --radius-md: 14px;
      --radius-lg: 20px;
      --transition: all 0.28s cubic-bezier(0.4, 0, 0.2, 1);
    }

    * {
      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", Arial, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      background-color: #f8fafc;
      color: var(--text-main);
      line-height: 1.65;
      overflow-x: hidden;
      -webkit-font-smoothing: antialiased;
    }

    /* 居中统一容器 */
    .container {
      width: 100%;
      max-width: 1200px;
      margin-left: auto;
      margin-right: auto;
      padding-left: 24px;
      padding-right: 24px;
    }

    /* 顶部导航 */
    .header-nav {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(255, 255, 255, 0.94);
      backdrop-filter: blur(12px);
      border-bottom: 1px solid var(--border-color);
      box-shadow: 0 2px 10px rgba(0, 0, 0, 0.03);
    }

    .nav-wrapper {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 76px;
    }

    .brand-logo-wrap {
      display: flex;
      align-items: center;
      gap: 12px;
      text-decoration: none;
    }

    .ai-page-logo {
      height: 42px;
      width: auto;
      display: block;
      object-fit: contain;
    }

    .brand-title {
      font-size: 1.25rem;
      font-weight: 700;
      color: var(--primary-dark);
      letter-spacing: -0.5px;
    }

    .brand-title span {
      background: var(--accent-gradient);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }

    .nav-menu {
      display: flex;
      align-items: center;
    }

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

    .nav-links li a {
      display: inline-block;
      padding: 8px 14px;
      font-size: 0.95rem;
      font-weight: 500;
      color: var(--text-muted);
      text-decoration: none;
      border-radius: var(--radius-sm);
      transition: var(--transition);
    }

    .nav-links li a:hover,
    .nav-links li a.active {
      color: var(--primary-teal);
      background-color: rgba(6, 182, 212, 0.08);
    }

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

    .btn-nav-primary {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 9px 20px;
      background: var(--accent-gradient);
      color: #ffffff !important;
      font-size: 0.92rem;
      font-weight: 600;
      text-decoration: none;
      border-radius: 50px;
      box-shadow: 0 4px 14px rgba(6, 182, 212, 0.35);
      transition: var(--transition);
    }

    .btn-nav-primary:hover {
      transform: translateY(-2px);
      box-shadow: 0 6px 20px rgba(6, 182, 212, 0.45);
    }

    .mobile-menu-toggle {
      display: none;
      background: none;
      border: none;
      cursor: pointer;
      padding: 8px;
    }

    .mobile-menu-toggle svg {
      width: 26px;
      height: 26px;
      fill: var(--text-main);
    }

    /* 区域通用结构 */
    section {
      padding: 72px 0;
      position: relative;
    }

    .section-header {
      text-align: center;
      max-width: 780px;
      margin: 0 auto 52px;
    }

    .section-tag {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      padding: 5px 14px;
      background: rgba(6, 182, 212, 0.1);
      border: 1px solid rgba(6, 182, 212, 0.25);
      color: var(--primary-teal);
      font-size: 0.85rem;
      font-weight: 600;
      border-radius: 30px;
      margin-bottom: 14px;
    }

    .section-title {
      font-size: 2.1rem;
      font-weight: 800;
      color: var(--primary-dark);
      letter-spacing: -0.5px;
      margin-bottom: 14px;
    }

    .section-subtitle {
      font-size: 1.05rem;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* Hero 首屏 (无图片，纯CSS与渐变青科技) */
    .hero-section {
      padding: 80px 0 90px;
      background: var(--hero-bg-gradient);
      border-bottom: 1px solid rgba(6, 182, 212, 0.15);
      position: relative;
      overflow: hidden;
    }

    .hero-glow-1 {
      position: absolute;
      top: -100px;
      left: -50px;
      width: 450px;
      height: 450px;
      background: radial-gradient(circle, rgba(6, 182, 212, 0.18) 0%, rgba(255,255,255,0) 70%);
      pointer-events: none;
    }

    .hero-glow-2 {
      position: absolute;
      bottom: -80px;
      right: -30px;
      width: 500px;
      height: 500px;
      background: radial-gradient(circle, rgba(13, 148, 136, 0.16) 0%, rgba(255,255,255,0) 70%);
      pointer-events: none;
    }

    .hero-content {
      position: relative;
      z-index: 2;
      text-align: center;
      max-width: 900px;
      margin: 0 auto;
    }

    .hero-badge {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      background: rgba(255, 255, 255, 0.9);
      border: 1px solid rgba(6, 182, 212, 0.3);
      padding: 6px 18px;
      border-radius: 30px;
      font-size: 0.9rem;
      font-weight: 600;
      color: var(--primary-teal);
      margin-bottom: 24px;
      box-shadow: var(--shadow-sm);
    }

    .hero-badge-pulse {
      width: 8px;
      height: 8px;
      background-color: var(--primary-cyan);
      border-radius: 50%;
      box-shadow: 0 0 0 0 rgba(6, 182, 212, 0.7);
      animation: pulse-ring 1.8s infinite cubic-bezier(0.66, 0, 0, 1);
    }

    @keyframes pulse-ring {
      0% { box-shadow: 0 0 0 0 rgba(6, 182, 212, 0.7); }
      70% { box-shadow: 0 0 0 10px rgba(6, 182, 212, 0); }
      100% { box-shadow: 0 0 0 0 rgba(6, 182, 212, 0); }
    }

    .hero-title {
      font-size: 2.7rem;
      font-weight: 800;
      line-height: 1.25;
      color: var(--primary-dark);
      margin-bottom: 22px;
      letter-spacing: -1px;
    }

    .hero-desc {
      font-size: 1.18rem;
      color: var(--text-muted);
      line-height: 1.7;
      margin-bottom: 38px;
      max-width: 780px;
      margin-left: auto;
      margin-right: auto;
    }

    .hero-actions {
      display: flex;
      align-items: center;
      justify-content: center;
      gap: 18px;
      flex-wrap: wrap;
      margin-bottom: 48px;
    }

    .btn-main-official {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      background: var(--accent-gradient);
      color: #ffffff;
      padding: 14px 34px;
      font-size: 1.1rem;
      font-weight: 700;
      text-decoration: none;
      border-radius: 50px;
      box-shadow: 0 8px 24px rgba(6, 182, 212, 0.38);
      transition: var(--transition);
      border: none;
    }

    .btn-main-official:hover {
      transform: translateY(-3px) scale(1.02);
      box-shadow: 0 12px 30px rgba(6, 182, 212, 0.48);
    }

    .btn-secondary {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      background: #ffffff;
      color: var(--primary-teal);
      border: 1px solid rgba(13, 148, 136, 0.3);
      padding: 14px 30px;
      font-size: 1.05rem;
      font-weight: 600;
      text-decoration: none;
      border-radius: 50px;
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
    }

    .btn-secondary:hover {
      background: #f0fdfa;
      border-color: var(--primary-teal);
      transform: translateY(-2px);
    }

    /* 首屏数据指标卡片群 (无图片) */
    .hero-stats-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      margin-top: 20px;
    }

    .stat-card {
      background: rgba(255, 255, 255, 0.85);
      backdrop-filter: blur(8px);
      border: 1px solid rgba(6, 182, 212, 0.2);
      border-radius: var(--radius-md);
      padding: 20px 16px;
      text-align: center;
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
    }

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

    .stat-number {
      font-size: 1.85rem;
      font-weight: 800;
      color: var(--primary-teal);
      margin-bottom: 4px;
    }

    .stat-label {
      font-size: 0.88rem;
      color: var(--text-muted);
      font-weight: 500;
    }

    /* 平台支持模型标签流 */
    .model-tags-box {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 30px;
      box-shadow: var(--shadow-sm);
      margin-top: -35px;
      position: relative;
      z-index: 3;
    }

    .model-tags-header {
      font-size: 0.95rem;
      font-weight: 700;
      color: var(--text-muted);
      text-align: center;
      margin-bottom: 16px;
      text-transform: uppercase;
      letter-spacing: 0.5px;
    }

    .model-tags-flex {
      display: flex;
      flex-wrap: wrap;
      justify-content: center;
      gap: 10px;
    }

    .model-badge {
      padding: 6px 14px;
      background: #f1f5f9;
      border: 1px solid #e2e8f0;
      border-radius: 6px;
      font-size: 0.84rem;
      font-weight: 600;
      color: #334155;
      transition: var(--transition);
    }

    .model-badge:hover {
      background: #e0f2fe;
      color: var(--primary-cyan);
      border-color: var(--primary-cyan);
      transform: translateY(-2px);
    }

    /* 平台核心能力卡片 */
    .feature-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .feature-card {
      background: var(--card-bg);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 32px 26px;
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
      display: flex;
      flex-direction: column;
    }

    .feature-card:hover {
      transform: translateY(-5px);
      box-shadow: var(--shadow-lg);
      border-color: rgba(6, 182, 212, 0.4);
    }

    .feature-icon-box {
      width: 52px;
      height: 52px;
      border-radius: 12px;
      background: linear-gradient(135deg, rgba(6, 182, 212, 0.15) 0%, rgba(13, 148, 136, 0.2) 100%);
      display: flex;
      align-items: center;
      justify-content: center;
      margin-bottom: 20px;
      color: var(--primary-teal);
      font-size: 1.5rem;
    }

    .feature-card h3 {
      font-size: 1.22rem;
      font-weight: 700;
      color: var(--primary-dark);
      margin-bottom: 12px;
    }

    .feature-card p {
      font-size: 0.95rem;
      color: var(--text-muted);
      line-height: 1.6;
      flex-grow: 1;
    }

    /* 场景矩阵卡片流 */
    .scenario-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
    }

    .scenario-card {
      background: #ffffff;
      border: 1px solid #edf2f7;
      border-radius: var(--radius-md);
      padding: 24px 20px;
      transition: var(--transition);
      box-shadow: var(--shadow-sm);
    }

    .scenario-card:hover {
      border-color: var(--primary-cyan);
      box-shadow: var(--shadow-md);
      transform: translateY(-3px);
    }

    .scenario-card h4 {
      font-size: 1.05rem;
      font-weight: 700;
      color: var(--primary-dark);
      margin-bottom: 8px;
      display: flex;
      align-items: center;
      gap: 8px;
    }

    .scenario-dot {
      width: 6px;
      height: 6px;
      background: var(--primary-teal);
      border-radius: 50%;
    }

    .scenario-card p {
      font-size: 0.88rem;
      color: var(--text-muted);
      line-height: 1.55;
    }

    /* 对比评测 板块 */
    .rating-banner {
      background: linear-gradient(135deg, #0f172a 0%, #1e293b 100%);
      border-radius: var(--radius-lg);
      padding: 36px;
      color: #ffffff;
      margin-bottom: 36px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      flex-wrap: wrap;
      gap: 24px;
      box-shadow: 0 12px 32px rgba(15, 23, 42, 0.2);
    }

    .rating-left h3 {
      font-size: 1.6rem;
      font-weight: 700;
      margin-bottom: 8px;
      color: #ffffff;
    }

    .rating-left p {
      color: #94a3b8;
      font-size: 0.95rem;
    }

    .rating-right {
      display: flex;
      align-items: center;
      gap: 24px;
    }

    .score-badge-wrap {
      text-align: right;
    }

    .score-stars {
      color: #fbbf24;
      font-size: 1.3rem;
      letter-spacing: 2px;
      margin-bottom: 4px;
    }

    .score-number {
      font-size: 2.4rem;
      font-weight: 900;
      color: #38bdf8;
      line-height: 1;
    }

    .score-max {
      font-size: 1.1rem;
      color: #94a3b8;
      font-weight: 500;
    }

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

    .compare-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
      font-size: 0.95rem;
    }

    .compare-table th, 
    .compare-table td {
      padding: 16px 20px;
      border-bottom: 1px solid var(--border-color);
    }

    .compare-table th {
      background: #f8fafc;
      font-weight: 700;
      color: var(--primary-dark);
    }

    .compare-table td.highlight {
      background: #f0fdfa;
      font-weight: 600;
      color: var(--primary-teal);
    }

    /* 案例展示 */
    .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: var(--transition);
    }

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

    .case-img-container {
      width: 100%;
      aspect-ratio: 16/9;
      background: #f1f5f9;
      overflow: hidden;
    }

    .case-img-container img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      display: block;
      transition: transform 0.4s ease;
    }

    .case-card:hover .case-img-container img {
      transform: scale(1.05);
    }

    .case-info {
      padding: 20px;
    }

    .case-tag {
      font-size: 0.8rem;
      font-weight: 600;
      color: var(--primary-teal);
      background: rgba(13, 148, 136, 0.1);
      padding: 3px 10px;
      border-radius: 4px;
      display: inline-block;
      margin-bottom: 10px;
    }

    .case-title {
      font-size: 1.15rem;
      font-weight: 700;
      color: var(--primary-dark);
      margin-bottom: 8px;
    }

    .case-desc {
      font-size: 0.9rem;
      color: var(--text-muted);
      line-height: 1.5;
    }

    /* 用户评论卡片 */
    .testimonial-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .testimonial-card {
      background: #ffffff;
      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;
      transition: var(--transition);
    }

    .testimonial-card:hover {
      border-color: var(--primary-cyan);
      box-shadow: var(--shadow-md);
    }

    .testimonial-content {
      font-size: 0.95rem;
      color: #334155;
      line-height: 1.65;
      margin-bottom: 20px;
      position: relative;
    }

    .testimonial-user {
      display: flex;
      align-items: center;
      gap: 12px;
      border-top: 1px solid #f1f5f9;
      padding-top: 16px;
    }

    .testimonial-avatar {
      width: 44px;
      height: 44px;
      border-radius: 50%;
      background: linear-gradient(135deg, #06b6d4, #0d9488);
      display: flex;
      align-items: center;
      justify-content: center;
      color: #ffffff;
      font-weight: 700;
      font-size: 1.1rem;
    }

    .testimonial-meta h5 {
      font-size: 0.95rem;
      font-weight: 700;
      color: var(--primary-dark);
    }

    .testimonial-meta p {
      font-size: 0.82rem;
      color: var(--text-light);
    }

    /* FAQ 手风琴 */
    .faq-container {
      max-width: 900px;
      margin: 0 auto;
    }

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

    .faq-question {
      padding: 20px 24px;
      font-size: 1.05rem;
      font-weight: 600;
      color: var(--primary-dark);
      cursor: pointer;
      display: flex;
      align-items: center;
      justify-content: space-between;
      user-select: none;
      transition: background-color 0.2s;
    }

    .faq-question:hover {
      background-color: #f8fafc;
      color: var(--primary-teal);
    }

    .faq-icon {
      font-size: 1.2rem;
      transition: transform 0.3s ease;
      color: var(--primary-cyan);
    }

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

    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s ease-out, padding 0.3s ease;
      background: #fafafa;
    }

    .faq-item.active .faq-answer {
      padding: 0 24px 20px;
      max-height: 300px;
    }

    .faq-answer p {
      font-size: 0.95rem;
      color: var(--text-muted);
      line-height: 1.65;
    }

    /* 需求匹配与联系我们表单 */
    .contact-wrapper {
      display: grid;
      grid-template-columns: 1fr 1.2fr;
      gap: 40px;
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 44px;
      box-shadow: var(--shadow-md);
    }

    .contact-info h3 {
      font-size: 1.5rem;
      font-weight: 800;
      color: var(--primary-dark);
      margin-bottom: 16px;
    }

    .contact-info p {
      font-size: 0.95rem;
      color: var(--text-muted);
      line-height: 1.65;
      margin-bottom: 24px;
    }

    .contact-list {
      list-style: none;
      margin-bottom: 28px;
    }

    .contact-list li {
      display: flex;
      align-items: center;
      gap: 12px;
      font-size: 0.95rem;
      color: #334155;
      margin-bottom: 14px;
    }

    .contact-list li strong {
      color: var(--primary-dark);
    }

    .qr-box {
      background: #f8fafc;
      border: 1px solid #e2e8f0;
      border-radius: var(--radius-md);
      padding: 16px;
      display: inline-flex;
      flex-direction: column;
      align-items: center;
      gap: 8px;
    }

    .qr-box img {
      width: 130px;
      height: 130px;
      object-fit: cover;
      border-radius: 6px;
    }

    .qr-box span {
      font-size: 0.82rem;
      color: var(--text-muted);
      font-weight: 600;
    }

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

    .form-group label {
      display: block;
      font-size: 0.9rem;
      font-weight: 600;
      color: var(--primary-dark);
      margin-bottom: 6px;
    }

    .form-control {
      width: 100%;
      padding: 12px 16px;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-sm);
      font-size: 0.95rem;
      color: var(--text-main);
      background: #ffffff;
      outline: none;
      transition: var(--transition);
    }

    .form-control:focus {
      border-color: var(--primary-cyan);
      box-shadow: 0 0 0 3px rgba(6, 182, 212, 0.15);
    }

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

    .btn-submit {
      width: 100%;
      padding: 14px;
      background: var(--accent-gradient);
      color: #ffffff;
      border: none;
      border-radius: var(--radius-sm);
      font-size: 1.05rem;
      font-weight: 700;
      cursor: pointer;
      box-shadow: 0 4px 14px rgba(6, 182, 212, 0.35);
      transition: var(--transition);
    }

    .btn-submit:hover {
      transform: translateY(-2px);
      box-shadow: 0 6px 20px rgba(6, 182, 212, 0.45);
    }

    /* 行业资讯与最新文章 */
    .article-links-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
      gap: 16px;
      margin-top: 24px;
    }

    .article-link-item {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-sm);
      padding: 14px 18px;
      text-decoration: none;
      color: var(--text-main);
      font-size: 0.92rem;
      font-weight: 500;
      display: flex;
      align-items: center;
      justify-content: space-between;
      transition: var(--transition);
    }

    .article-link-item:hover {
      border-color: var(--primary-teal);
      color: var(--primary-teal);
      background: #f0fdfa;
      transform: translateX(3px);
    }

    /* 页脚与友情链接 */
    .footer-site {
      background: #0f172a;
      color: #cbd5e1;
      padding: 56px 0 24px;
      border-top: 1px solid #1e293b;
    }

    .footer-main-grid {
      display: grid;
      grid-template-columns: 1.5fr 1fr 1fr 1.2fr;
      gap: 36px;
      margin-bottom: 40px;
    }

    .footer-brand h4 {
      font-size: 1.3rem;
      color: #ffffff;
      font-weight: 800;
      margin-bottom: 12px;
    }

    .footer-brand p {
      font-size: 0.9rem;
      color: #94a3b8;
      line-height: 1.6;
      margin-bottom: 16px;
    }

    .footer-col h5 {
      font-size: 1.05rem;
      color: #ffffff;
      font-weight: 700;
      margin-bottom: 16px;
    }

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

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

    .footer-links-list li a {
      color: #94a3b8;
      text-decoration: none;
      font-size: 0.9rem;
      transition: var(--transition);
    }

    .footer-links-list li a:hover {
      color: #38bdf8;
    }

    .friend-links-box {
      border-top: 1px solid #1e293b;
      padding-top: 24px;
      margin-bottom: 28px;
    }

    .friend-links-box h6 {
      font-size: 0.9rem;
      color: #64748b;
      margin-bottom: 12px;
      font-weight: 600;
    }

    .friend-links-flex {
      display: flex;
      flex-wrap: wrap;
      gap: 16px;
    }

    .friend-links-flex a {
      color: #94a3b8;
      text-decoration: none;
      font-size: 0.88rem;
      transition: var(--transition);
    }

    .friend-links-flex a:hover {
      color: #38bdf8;
      text-decoration: underline;
    }

    .footer-bottom {
      border-top: 1px solid #1e293b;
      padding-top: 20px;
      text-align: center;
      font-size: 0.85rem;
      color: #64748b;
    }

    /* 浮动工具栏与客服 */
    .float-toolbar {
      position: fixed;
      right: 20px;
      bottom: 40px;
      z-index: 999;
      display: flex;
      flex-direction: column;
      gap: 12px;
    }

    .float-btn {
      width: 48px;
      height: 48px;
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      box-shadow: var(--shadow-md);
      cursor: pointer;
      color: var(--primary-teal);
      text-decoration: none;
      transition: var(--transition);
    }

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

    /* 响应式适配 */
    @media (max-width: 992px) {
      .hero-title { font-size: 2.2rem; }
      .feature-grid, .testimonial-grid, .case-grid { grid-template-columns: repeat(2, 1fr); }
      .scenario-grid { grid-template-columns: repeat(2, 1fr); }
      .hero-stats-grid { grid-template-columns: repeat(2, 1fr); }
      .contact-wrapper { grid-template-columns: 1fr; }
      .footer-main-grid { grid-template-columns: repeat(2, 1fr); }
    }

    @media (max-width: 768px) {
      .mobile-menu-toggle { display: block; }
      .nav-menu {
        position: fixed;
        top: 76px;
        left: 0;
        width: 100%;
        background: #ffffff;
        padding: 20px;
        box-shadow: 0 10px 20px rgba(0,0,0,0.1);
        display: none;
        flex-direction: column;
        gap: 16px;
      }
      .nav-menu.open { display: flex; }
      .nav-links { flex-direction: column; align-items: flex-start; width: 100%; }
      .nav-links li { width: 100%; }
      .nav-links li a { width: 100%; padding: 10px 0; border-bottom: 1px solid #f1f5f9; }
      .hero-title { font-size: 1.8rem; }
      .section-title { font-size: 1.6rem; }
      .feature-grid, .testimonial-grid, .case-grid, .scenario-grid, .hero-stats-grid { grid-template-columns: 1fr; }
      .footer-main-grid { grid-template-columns: 1fr; }
      .rating-banner { flex-direction: column; text-align: center; }
      .score-badge-wrap { text-align: center; }
    }