/* 全局变量与鲜亮风格设定 */
    :root {
      --primary: #2563eb;
      --primary-light: #3b82f6;
      --primary-dark: #1d4ed8;
      --accent: #7c3aed;
      --accent-bright: #ec4899;
      --cyan: #06b6d4;
      --emerald: #10b981;
      --amber: #f59e0b;
      --bg-page: #f8fafc;
      --bg-card: #ffffff;
      --text-main: #0f172a;
      --text-sub: #475569;
      --text-muted: #64748b;
      --border-light: #e2e8f0;
      --border-focus: #93c5fd;
      --shadow-sm: 0 2px 8px rgba(37, 99, 235, 0.05);
      --shadow-md: 0 10px 25px -5px rgba(37, 99, 235, 0.08), 0 8px 10px -6px rgba(124, 58, 237, 0.05);
      --shadow-lg: 0 20px 35px -8px rgba(37, 99, 235, 0.12), 0 12px 18px -6px rgba(124, 58, 237, 0.08);
      --radius-sm: 8px;
      --radius-md: 14px;
      --radius-lg: 20px;
      --radius-pill: 9999px;
      --container-max: 1200px;
      --transition: all 0.28s ease;
    }

    * {
      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, "Helvetica Neue", "PingFang SC", "Noto Sans", "Microsoft YaHei", sans-serif;
      background-color: var(--bg-page);
      color: var(--text-main);
      line-height: 1.65;
      overflow-x: hidden;
      background-image: 
        radial-gradient(circle at 10% 10%, rgba(37, 99, 235, 0.05) 0%, transparent 40%),
        radial-gradient(circle at 90% 40%, rgba(124, 58, 237, 0.05) 0%, transparent 45%),
        radial-gradient(circle at 30% 80%, rgba(6, 182, 212, 0.04) 0%, transparent 50%);
      background-attachment: fixed;
    }

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

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

    /* 导航栏规范 */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(255, 255, 255, 0.94);
      backdrop-filter: blur(12px);
      -webkit-backdrop-filter: blur(12px);
      border-bottom: 1px solid rgba(226, 232, 240, 0.8);
      box-shadow: 0 4px 20px rgba(0, 0, 0, 0.03);
    }

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

    .brand-logo-area {
      display: flex;
      align-items: center;
      gap: 12px;
      flex-shrink: 0;
    }

    .brand-logo-area img.ai-page-logo {
      height: 38px;
      width: auto;
      object-fit: contain;
      display: block;
    }

    .brand-title {
      font-size: 1.25rem;
      font-weight: 800;
      background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      letter-spacing: -0.02em;
    }

    /* 核心要求：nav-links 的 gap 属性设置为 0 */
    .nav-links {
      display: flex;
      align-items: center;
      list-style: none;
      gap: 0;
    }

    .nav-links li {
      margin: 0;
      padding: 0;
    }

    .nav-links li a {
      display: inline-block;
      font-size: 0.92rem;
      font-weight: 600;
      color: var(--text-sub);
      padding: 8px 14px;
      border-radius: var(--radius-sm);
      transition: var(--transition);
    }

    .nav-links li a:hover,
    .nav-links li a.active {
      color: var(--primary);
      background-color: rgba(37, 99, 235, 0.08);
    }

    .header-actions {
      display: flex;
      align-items: center;
      gap: 12px;
      flex-shrink: 0;
    }

    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      font-size: 0.95rem;
      font-weight: 600;
      padding: 10px 22px;
      border-radius: var(--radius-pill);
      cursor: pointer;
      border: 1px solid transparent;
      transition: var(--transition);
      white-space: nowrap;
      text-align: center;
    }

    .btn-primary {
      background: linear-gradient(135deg, #2563eb 0%, #7c3aed 100%);
      color: #ffffff;
      box-shadow: 0 4px 14px rgba(37, 99, 235, 0.3);
    }

    .btn-primary:hover {
      transform: translateY(-2px);
      box-shadow: 0 6px 20px rgba(37, 99, 235, 0.45);
      color: #ffffff;
    }

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

    .btn-outline:hover {
      border-color: var(--primary);
      background-color: rgba(37, 99, 235, 0.05);
      transform: translateY(-2px);
    }

    .btn-accent {
      background: linear-gradient(135deg, #f59e0b 0%, #ea580c 100%);
      color: #ffffff;
      box-shadow: 0 4px 14px rgba(245, 158, 11, 0.35);
    }

    .btn-accent:hover {
      transform: translateY(-2px);
      box-shadow: 0 6px 20px rgba(245, 158, 11, 0.5);
      color: #ffffff;
    }

    .mobile-menu-btn {
      display: none;
      background: none;
      border: none;
      font-size: 1.5rem;
      color: var(--text-main);
      cursor: pointer;
      padding: 4px;
    }

    /* 首屏 HERO（纯代码/纯色渐变/几何/CSS，绝对无图片） */
    .hero-section {
      position: relative;
      padding: 64px 0 54px;
      overflow: hidden;
      background: linear-gradient(180deg, #ffffff 0%, rgba(239, 246, 255, 0.65) 60%, var(--bg-page) 100%);
      border-bottom: 1px solid var(--border-light);
    }

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

    .hero-tag {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      background: #eff6ff;
      border: 1px solid #bfdbfe;
      color: var(--primary);
      font-size: 0.85rem;
      font-weight: 700;
      padding: 6px 18px;
      border-radius: var(--radius-pill);
      margin-bottom: 20px;
      box-shadow: 0 2px 6px rgba(37, 99, 235, 0.08);
    }

    .hero-tag span.badge {
      background: var(--primary);
      color: #ffffff;
      padding: 2px 8px;
      border-radius: 10px;
      font-size: 0.75rem;
    }

    /* H1 控制在20字内 */
    .hero-title {
      font-size: clamp(2rem, 4.5vw, 3.1rem);
      font-weight: 900;
      line-height: 1.25;
      color: #0f172a;
      letter-spacing: -0.03em;
      margin-bottom: 18px;
    }

    .hero-title .highlight {
      background: linear-gradient(135deg, #2563eb 0%, #7c3aed 50%, #06b6d4 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }

    .hero-sub {
      font-size: clamp(1rem, 1.8vw, 1.2rem);
      color: var(--text-sub);
      max-width: 760px;
      margin: 0 auto 32px;
      font-weight: 400;
    }

    .hero-cta-group {
      display: flex;
      align-items: center;
      justify-content: center;
      gap: 16px;
      flex-wrap: wrap;
      margin-bottom: 40px;
    }

    .btn-hero-main {
      font-size: 1.1rem;
      padding: 14px 36px;
      font-weight: 700;
      letter-spacing: 0.02em;
    }

    /* 首屏数据看板（纯CSS卡片，无图） */
    .hero-stats-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 16px;
      margin-top: 20px;
    }

    .hero-stat-card {
      background: #ffffff;
      border: 1px solid #e0e7ff;
      border-radius: var(--radius-md);
      padding: 18px 12px;
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
      text-align: center;
    }

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

    .hero-stat-num {
      font-size: 1.85rem;
      font-weight: 800;
      color: var(--primary);
      line-height: 1.1;
      margin-bottom: 4px;
    }

    .hero-stat-num small {
      font-size: 0.9rem;
      font-weight: 600;
      margin-left: 2px;
    }

    .hero-stat-label {
      font-size: 0.85rem;
      color: var(--text-sub);
      font-weight: 500;
    }

    /* 区域通用标题 */
    .section-padding {
      padding: 70px 0;
    }

    .section-header {
      text-align: center;
      max-width: 720px;
      margin: 0 auto 46px;
    }

    .section-eyebrow {
      display: inline-block;
      font-size: 0.82rem;
      font-weight: 700;
      text-transform: uppercase;
      letter-spacing: 0.08em;
      color: var(--primary);
      background: #dbeafe;
      padding: 4px 14px;
      border-radius: var(--radius-pill);
      margin-bottom: 12px;
    }

    .section-title {
      font-size: clamp(1.6rem, 3vw, 2.3rem);
      font-weight: 800;
      color: var(--text-main);
      margin-bottom: 12px;
      letter-spacing: -0.02em;
    }

    .section-desc {
      font-size: 1rem;
      color: var(--text-sub);
    }

    /* 卡片体系与网格 */
    .grid-3 {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

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

    .grid-2 {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 30px;
      align-items: center;
    }

    .feature-card {
      background: var(--bg-card);
      border: 1px solid var(--border-light);
      border-radius: var(--radius-lg);
      padding: 28px 24px;
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
      display: flex;
      flex-direction: column;
      position: relative;
      overflow: hidden;
    }

    .feature-card::before {
      content: "";
      position: absolute;
      top: 0;
      left: 0;
      width: 100%;
      height: 4px;
      background: linear-gradient(90deg, var(--primary), var(--cyan));
      opacity: 0;
      transition: var(--transition);
    }

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

    .feature-card:hover::before {
      opacity: 1;
    }

    .card-icon {
      width: 52px;
      height: 52px;
      border-radius: 14px;
      background: linear-gradient(135deg, rgba(37, 99, 235, 0.1) 0%, rgba(124, 58, 237, 0.1) 100%);
      color: var(--primary);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.5rem;
      margin-bottom: 18px;
    }

    .feature-card h3 {
      font-size: 1.2rem;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 10px;
    }

    .feature-card p {
      font-size: 0.92rem;
      color: var(--text-sub);
      line-height: 1.6;
      flex-grow: 1;
    }

    .card-tag-list {
      display: flex;
      flex-wrap: wrap;
      gap: 6px;
      margin-top: 14px;
    }

    .tag-item {
      font-size: 0.75rem;
      padding: 3px 8px;
      background: #f1f5f9;
      color: var(--text-sub);
      border-radius: 4px;
      font-weight: 500;
    }

    /* 平台支持模型矩阵墙 */
    .model-badge-wrap {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      justify-content: center;
      margin-top: 24px;
    }

    .model-badge {
      background: #ffffff;
      border: 1px solid #cbd5e1;
      padding: 8px 16px;
      border-radius: var(--radius-pill);
      font-size: 0.88rem;
      font-weight: 600;
      color: var(--text-main);
      box-shadow: 0 2px 4px rgba(0, 0, 0, 0.02);
      transition: var(--transition);
      display: inline-flex;
      align-items: center;
      gap: 6px;
    }

    .model-badge:hover {
      border-color: var(--primary);
      color: var(--primary);
      background: #eff6ff;
      transform: translateY(-2px);
    }

    .model-badge .dot {
      width: 6px;
      height: 6px;
      border-radius: 50%;
      background: var(--emerald);
    }

    /* 对比评测板块 */
    .review-score-banner {
      background: linear-gradient(135deg, #eff6ff 0%, #faf5ff 100%);
      border: 1px solid #c7d2fe;
      border-radius: var(--radius-lg);
      padding: 32px;
      margin-bottom: 30px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      flex-wrap: wrap;
      gap: 20px;
    }

    .review-score-left h3 {
      font-size: 1.4rem;
      font-weight: 800;
      color: var(--text-main);
      margin-bottom: 6px;
    }

    .review-score-left p {
      font-size: 0.95rem;
      color: var(--text-sub);
    }

    .score-badge-box {
      display: flex;
      align-items: center;
      gap: 16px;
      background: #ffffff;
      padding: 12px 24px;
      border-radius: var(--radius-md);
      box-shadow: var(--shadow-sm);
      border: 1px solid #e2e8f0;
    }

    .score-number {
      font-size: 2.2rem;
      font-weight: 900;
      color: #ea580c;
      line-height: 1;
    }

    .score-detail {
      font-size: 0.85rem;
      color: var(--text-sub);
      line-height: 1.3;
    }

    .stars-icon {
      color: #f59e0b;
      font-size: 1.1rem;
      display: block;
      margin-bottom: 2px;
    }

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

    .compare-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
      min-width: 650px;
    }

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

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

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

    .compare-table .highlight-col {
      background: rgba(239, 246, 255, 0.4);
      font-weight: 700;
      color: var(--primary);
    }

    /* 流程步骤 */
    .steps-container {
      display: grid;
      grid-template-columns: repeat(5, 1fr);
      gap: 16px;
      position: relative;
    }

    .step-card {
      background: #ffffff;
      border: 1px solid var(--border-light);
      border-radius: var(--radius-md);
      padding: 24px 16px;
      text-align: center;
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
      position: relative;
    }

    .step-card:hover {
      transform: translateY(-3px);
      border-color: var(--primary);
    }

    .step-num {
      width: 36px;
      height: 36px;
      background: linear-gradient(135deg, var(--primary), var(--accent));
      color: #ffffff;
      border-radius: 50%;
      font-weight: 800;
      font-size: 1rem;
      display: flex;
      align-items: center;
      justify-content: center;
      margin: 0 auto 12px;
    }

    .step-card h4 {
      font-size: 1.05rem;
      font-weight: 700;
      margin-bottom: 6px;
    }

    .step-card p {
      font-size: 0.82rem;
      color: var(--text-sub);
      line-height: 1.5;
    }

    /* 案例展示区（带图片） */
    .case-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .case-card {
      background: #ffffff;
      border-radius: var(--radius-lg);
      border: 1px solid var(--border-light);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
    }

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

    .case-img-wrap {
      width: 100%;
      aspect-ratio: 16 / 9;
      background: #e2e8f0;
      overflow: hidden;
      display: flex;
      align-items: center;
      justify-content: center;
    }

    .case-img-wrap.square-ratio {
      aspect-ratio: 1 / 1;
      max-height: 240px;
    }

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

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

    .case-content {
      padding: 20px;
    }

    .case-content h4 {
      font-size: 1.1rem;
      font-weight: 700;
      margin-bottom: 6px;
      color: var(--text-main);
    }

    .case-content p {
      font-size: 0.88rem;
      color: var(--text-sub);
      line-height: 1.5;
    }

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

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

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

    .testimonial-body {
      font-size: 0.92rem;
      color: var(--text-main);
      line-height: 1.6;
      margin-bottom: 18px;
    }

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

    .avatar-circle {
      width: 42px;
      height: 42px;
      border-radius: 50%;
      background: linear-gradient(135deg, #3b82f6, #8b5cf6);
      color: #ffffff;
      font-weight: 700;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 0.95rem;
      flex-shrink: 0;
    }

    .user-info h5 {
      font-size: 0.92rem;
      font-weight: 700;
      color: var(--text-main);
    }

    .user-info p {
      font-size: 0.78rem;
      color: var(--text-muted);
    }

    /* FAQ 折叠面板 */
    .faq-list {
      max-width: 860px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      gap: 12px;
    }

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

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

    .faq-question {
      width: 100%;
      text-align: left;
      padding: 18px 24px;
      background: none;
      border: none;
      font-size: 1.02rem;
      font-weight: 700;
      color: var(--text-main);
      display: flex;
      align-items: center;
      justify-content: space-between;
      cursor: pointer;
      gap: 12px;
    }

    .faq-question:hover {
      color: var(--primary);
    }

    .faq-toggle-icon {
      font-size: 1.2rem;
      transition: transform 0.25s ease;
      color: var(--primary);
    }

    .faq-item.active .faq-toggle-icon {
      transform: rotate(180deg);
    }

    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s ease-out;
      background: #f8fafc;
    }

    .faq-answer-inner {
      padding: 0 24px 20px;
      font-size: 0.92rem;
      color: var(--text-sub);
      line-height: 1.65;
    }

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

    .contact-info-side {
      background: linear-gradient(135deg, #1e293b 0%, #0f172a 100%);
      color: #ffffff;
      padding: 40px;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .contact-info-side h3 {
      font-size: 1.5rem;
      font-weight: 800;
      margin-bottom: 12px;
      color: #ffffff;
    }

    .contact-info-side p {
      font-size: 0.92rem;
      color: #94a3b8;
      line-height: 1.6;
      margin-bottom: 24px;
    }

    .contact-detail-list {
      display: flex;
      flex-direction: column;
      gap: 14px;
      margin-bottom: 24px;
    }

    .contact-detail-item {
      display: flex;
      align-items: center;
      gap: 12px;
      font-size: 0.9rem;
      color: #e2e8f0;
    }

    .contact-detail-item strong {
      color: #60a5fa;
      min-width: 70px;
    }

    .qr-box-wrap {
      display: flex;
      align-items: center;
      gap: 16px;
      background: rgba(255, 255, 255, 0.06);
      padding: 14px;
      border-radius: var(--radius-md);
      border: 1px solid rgba(255, 255, 255, 0.1);
    }

    .qr-box-wrap img {
      width: 76px;
      height: 76px;
      border-radius: 6px;
      background: #ffffff;
      object-fit: contain;
    }

    .qr-desc h6 {
      font-size: 0.9rem;
      font-weight: 700;
      color: #ffffff;
      margin-bottom: 4px;
    }

    .qr-desc p {
      font-size: 0.78rem;
      color: #cbd5e1;
      margin: 0;
    }

    .contact-form-side {
      padding: 40px;
      background: #ffffff;
    }

    .contact-form-side h3 {
      font-size: 1.4rem;
      font-weight: 800;
      margin-bottom: 20px;
      color: var(--text-main);
    }

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

    .form-group 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 #cbd5e1;
      border-radius: var(--radius-sm);
      font-size: 0.92rem;
      color: var(--text-main);
      outline: none;
      transition: var(--transition);
      background: #f8fafc;
    }

    .form-control:focus {
      border-color: var(--primary);
      background: #ffffff;
      box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.12);
    }

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

    /* 资讯与友情链接 */
    .article-link-list {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
      margin-top: 16px;
    }

    .article-chip {
      background: #ffffff;
      border: 1px solid var(--border-light);
      padding: 8px 16px;
      border-radius: var(--radius-sm);
      font-size: 0.85rem;
      color: var(--text-sub);
      transition: var(--transition);
      display: inline-block;
    }

    .article-chip:hover {
      border-color: var(--primary);
      color: var(--primary);
      background: #eff6ff;
    }

    .footer-links-wrap {
      margin-top: 24px;
      padding-top: 20px;
      border-top: 1px dashed var(--border-light);
    }

    .footer-links-title {
      font-size: 0.88rem;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 10px;
    }

    .friendship-links {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
    }

    .friendship-links a {
      font-size: 0.82rem;
      color: var(--text-muted);
      transition: var(--transition);
    }

    .friendship-links a:hover {
      color: var(--primary);
      text-decoration: underline;
    }

    /* 底部通用规范 */
    .site-footer {
      background: #ffffff;
      border-top: 1px solid var(--border-light);
      padding: 40px 0 24px;
      color: var(--text-sub);
    }

    .footer-bottom {
      text-align: center;
      font-size: 0.82rem;
      color: var(--text-muted);
      margin-top: 24px;
      padding-top: 18px;
      border-top: 1px solid #f1f5f9;
    }

    /* 浮动客服小挂件 */
    .floating-kefu {
      position: fixed;
      right: 20px;
      bottom: 24px;
      z-index: 999;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }

    .float-btn {
      width: 48px;
      height: 48px;
      border-radius: 50%;
      background: #ffffff;
      box-shadow: 0 6px 18px rgba(0, 0, 0, 0.12);
      display: flex;
      align-items: center;
      justify-content: center;
      color: var(--primary);
      font-size: 1.25rem;
      border: 1px solid #e2e8f0;
      cursor: pointer;
      transition: var(--transition);
    }

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

    .float-btn.main-cta {
      background: linear-gradient(135deg, var(--primary), var(--accent));
      color: #ffffff;
      border: none;
    }

    /* 响应式调整 */
    @media (max-width: 992px) {
      .hero-stats-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .grid-3,
      .case-grid,
      .testimonial-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .grid-4 {
        grid-template-columns: repeat(2, 1fr);
      }
      .steps-container {
        grid-template-columns: repeat(3, 1fr);
      }
      .contact-container {
        grid-template-columns: 1fr;
      }
      .grid-2 {
        grid-template-columns: 1fr;
      }
    }

    @media (max-width: 768px) {
      .header-inner {
        height: 62px;
      }
      .mobile-menu-btn {
        display: block;
      }
      .nav-links {
        position: fixed;
        top: 62px;
        left: 0;
        width: 100%;
        background: #ffffff;
        flex-direction: column;
        padding: 16px 20px;
        border-bottom: 1px solid var(--border-light);
        box-shadow: var(--shadow-md);
        display: none;
      }
      .nav-links.show {
        display: flex;
      }
      .nav-links li a {
        width: 100%;
        padding: 10px 14px;
      }
      .header-actions .btn-outline {
        display: none;
      }
      .grid-3,
      .grid-4,
      .case-grid,
      .testimonial-grid,
      .steps-container {
        grid-template-columns: 1fr;
      }
      .review-score-banner {
        flex-direction: column;
        align-items: flex-start;
      }
      .hero-section {
        padding: 40px 0 36px;
      }
      .contact-info-side,
      .contact-form-side {
        padding: 24px;
      }
    }