:root {
      --primary: #4f46e5;
      --primary-hover: #4338ca;
      --accent-coral: #ff5e62;
      --accent-amber: #ff9966;
      --accent-teal: #06b6d4;
      --accent-purple: #8b5cf6;
      --accent-emerald: #10b981;
      --bg-page: #f8fafc;
      --bg-surface: #ffffff;
      --text-main: #0f172a;
      --text-muted: #475569;
      --border-color: #e2e8f0;
      --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
      --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.07), 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 -4px rgba(0, 0, 0, 0.04);
      --radius: 12px;
      --max-width: 1240px;
    }

    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }

    html {
      scroll-behavior: smooth;
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    }

    body {
      background-color: var(--bg-page);
      background-image: 
        radial-gradient(at 0% 0%, rgba(255, 153, 102, 0.06) 0px, transparent 50%),
        radial-gradient(at 100% 0%, rgba(79, 70, 229, 0.08) 0px, transparent 50%),
        radial-gradient(at 50% 100%, rgba(6, 182, 212, 0.06) 0px, transparent 50%);
      background-attachment: fixed;
      color: var(--text-main);
      line-height: 1.6;
      -webkit-font-smoothing: antialiased;
    }

    .container {
      width: 100%;
      max-width: var(--max-width);
      margin: 0 auto;
      padding: 0 20px;
    }

    /* 顶部导航 */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 100;
      background: rgba(255, 255, 255, 0.92);
      backdrop-filter: blur(10px);
      border-bottom: 1px solid var(--border-color);
    }

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

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

    .brand-title {
      font-size: 20px;
      font-weight: 800;
      color: var(--text-main);
      letter-spacing: -0.5px;
    }

    .brand-tag {
      background: linear-gradient(135deg, var(--accent-coral), var(--accent-amber));
      color: #fff;
      font-size: 11px;
      padding: 2px 8px;
      border-radius: 20px;
      font-weight: 600;
    }

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

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

    .nav-links a {
      text-decoration: none;
      color: var(--text-muted);
      font-size: 14px;
      font-weight: 500;
      padding: 8px 12px;
      border-radius: 6px;
      transition: color 0.2s ease, background-color 0.2s ease;
    }

    .nav-links a:hover,
    .nav-links a.active {
      color: var(--primary);
      background-color: #f1f5f9;
    }

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

    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      font-weight: 600;
      text-decoration: none;
      border-radius: 8px;
      padding: 10px 20px;
      font-size: 14px;
      transition: all 0.2s ease;
      cursor: pointer;
      border: 1px solid transparent;
    }

    .btn-primary {
      background: linear-gradient(135deg, var(--primary), var(--accent-purple));
      color: #ffffff;
      box-shadow: 0 4px 12px rgba(79, 70, 229, 0.25);
    }

    .btn-primary:hover {
      transform: translateY(-1px);
      box-shadow: 0 6px 16px rgba(79, 70, 229, 0.35);
      color: #ffffff;
    }

    .btn-secondary {
      background: #ffffff;
      color: var(--text-main);
      border-color: var(--border-color);
    }

    .btn-secondary:hover {
      background: #f8fafc;
      border-color: #cbd5e1;
    }

    .btn-warm {
      background: linear-gradient(135deg, var(--accent-coral), var(--accent-amber));
      color: #ffffff;
      box-shadow: 0 4px 12px rgba(255, 94, 98, 0.25);
    }

    .btn-warm:hover {
      transform: translateY(-1px);
      box-shadow: 0 6px 16px rgba(255, 94, 98, 0.35);
      color: #ffffff;
    }

    .btn-sm {
      padding: 6px 14px;
      font-size: 13px;
    }

    .btn-lg {
      padding: 14px 32px;
      font-size: 16px;
    }

    .mobile-menu-btn {
      display: none;
      background: none;
      border: none;
      font-size: 24px;
      color: var(--text-main);
      cursor: pointer;
    }

    /* 区域统一标准 */
    .section-wrap {
      padding: 72px 0;
    }

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

    .section-eyebrow {
      display: inline-block;
      font-size: 13px;
      font-weight: 700;
      text-transform: uppercase;
      letter-spacing: 1px;
      padding: 4px 12px;
      border-radius: 20px;
      margin-bottom: 12px;
    }

    .eyebrow-blue { background: #e0e7ff; color: var(--primary); }
    .eyebrow-coral { background: #ffe4e6; color: #e11d48; }
    .eyebrow-teal { background: #ccfbf1; color: #0f766e; }
    .eyebrow-amber { background: #fef3c7; color: #d97706; }
    .eyebrow-purple { background: #f3e8ff; color: #7e22ce; }

    .section-title {
      font-size: 32px;
      font-weight: 800;
      color: var(--text-main);
      margin-bottom: 14px;
      line-height: 1.3;
    }

    .section-desc {
      font-size: 16px;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* 首屏 HERO（不含图片） */
    .hero-section {
      padding: 80px 0 60px;
      text-align: center;
    }

    .hero-badge-group {
      display: flex;
      justify-content: center;
      gap: 10px;
      margin-bottom: 24px;
      flex-wrap: wrap;
    }

    .hero-badge {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      background: #ffffff;
      border: 1px solid var(--border-color);
      padding: 6px 14px;
      border-radius: 30px;
      font-size: 13px;
      font-weight: 600;
      color: var(--text-muted);
      box-shadow: var(--shadow-sm);
    }

    .hero-badge-dot {
      width: 8px;
      height: 8px;
      border-radius: 50%;
      background: var(--accent-emerald);
      animation: pulse 2s infinite;
    }

    @keyframes pulse {
      0% { opacity: 0.6; transform: scale(0.9); }
      50% { opacity: 1; transform: scale(1.2); }
      100% { opacity: 0.6; transform: scale(0.9); }
    }

    .hero-title {
      font-size: 44px;
      font-weight: 900;
      color: var(--text-main);
      line-height: 1.25;
      margin-bottom: 20px;
      letter-spacing: -1px;
    }

    .text-gradient {
      background: linear-gradient(135deg, var(--primary), var(--accent-coral), var(--accent-teal));
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }

    .hero-subtitle {
      font-size: 18px;
      color: var(--text-muted);
      max-width: 820px;
      margin: 0 auto 36px;
      line-height: 1.7;
    }

    .hero-cta-box {
      display: flex;
      justify-content: center;
      gap: 16px;
      flex-wrap: wrap;
      margin-bottom: 48px;
    }

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

    .metric-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      padding: 24px;
      text-align: center;
      box-shadow: var(--shadow-sm);
      transition: transform 0.2s ease, box-shadow 0.2s ease;
    }

    .metric-card:hover {
      transform: translateY(-3px);
      box-shadow: var(--shadow-md);
    }

    .metric-num {
      font-size: 32px;
      font-weight: 800;
      color: var(--text-main);
      margin-bottom: 4px;
      display: block;
    }

    .metric-label {
      font-size: 13px;
      color: var(--text-muted);
      font-weight: 500;
    }

    /* 斑斓色彩条带 */
    .color-ribbon-bar {
      height: 4px;
      background: linear-gradient(90deg, #ff5e62, #ff9966, #10b981, #06b6d4, #4f46e5, #8b5cf6);
      border-radius: 2px;
      margin: 30px 0;
    }

    /* 卡片网格通用 */
    .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: 28px;
    }

    .service-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      padding: 28px;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
      box-shadow: var(--shadow-sm);
      transition: all 0.25s ease;
      position: relative;
      overflow: hidden;
    }

    .service-card::before {
      content: "";
      position: absolute;
      top: 0;
      left: 0;
      right: 0;
      height: 3px;
      background: var(--card-border-gradient, linear-gradient(90deg, var(--primary), var(--accent-purple)));
      opacity: 0;
      transition: opacity 0.2s ease;
    }

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

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

    .card-icon-box {
      width: 48px;
      height: 48px;
      border-radius: 10px;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 22px;
      margin-bottom: 20px;
      background: #f1f5f9;
      color: var(--primary);
    }

    .card-title {
      font-size: 18px;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 10px;
    }

    .card-text {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.6;
      margin-bottom: 18px;
    }

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

    .card-tag {
      font-size: 11px;
      padding: 3px 8px;
      background: #f8fafc;
      color: #64748b;
      border: 1px solid #e2e8f0;
      border-radius: 4px;
    }

    /* 平台聚合标签云 */
    .model-pills-wrap {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      justify-content: center;
      margin-top: 24px;
    }

    .model-pill {
      background: #ffffff;
      border: 1px solid var(--border-color);
      padding: 8px 16px;
      border-radius: 30px;
      font-size: 13px;
      font-weight: 600;
      color: var(--text-main);
      box-shadow: var(--shadow-sm);
      display: inline-flex;
      align-items: center;
      gap: 6px;
      transition: transform 0.2s ease, border-color 0.2s ease;
    }

    .model-pill:hover {
      border-color: var(--primary);
      transform: scale(1.05);
    }

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

    .process-step-item {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      padding: 24px 18px;
      text-align: center;
      box-shadow: var(--shadow-sm);
    }

    .step-badge {
      width: 36px;
      height: 36px;
      border-radius: 50%;
      background: var(--primary);
      color: #fff;
      font-weight: 800;
      font-size: 14px;
      display: flex;
      align-items: center;
      justify-content: center;
      margin: 0 auto 16px;
    }

    .step-name {
      font-size: 16px;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 8px;
    }

    .step-desc {
      font-size: 12px;
      color: var(--text-muted);
      line-height: 1.5;
    }

    /* 对比评测表格 */
    .comparison-section-box {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      box-shadow: var(--shadow-md);
      overflow: hidden;
    }

    .rating-banner {
      background: linear-gradient(135deg, #1e1b4b, #312e81);
      color: #ffffff;
      padding: 28px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      flex-wrap: wrap;
      gap: 20px;
    }

    .rating-content h3 {
      font-size: 22px;
      font-weight: 800;
      margin-bottom: 6px;
    }

    .rating-content p {
      font-size: 14px;
      color: #c7d2fe;
    }

    .rating-score-box {
      display: flex;
      align-items: center;
      gap: 16px;
    }

    .score-circle {
      background: linear-gradient(135deg, var(--accent-coral), var(--accent-amber));
      padding: 12px 20px;
      border-radius: 12px;
      text-align: center;
    }

    .score-value {
      font-size: 28px;
      font-weight: 900;
      line-height: 1;
    }

    .score-max {
      font-size: 11px;
      opacity: 0.9;
    }

    .rating-stars {
      color: #fbbf24;
      font-size: 20px;
      letter-spacing: 2px;
    }

    .table-container {
      width: 100%;
      overflow-x: auto;
    }

    .comparison-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
      font-size: 14px;
    }

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

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

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

    .comparison-table tr:hover td {
      background: #fafafa;
    }

    .badge-highlight {
      display: inline-block;
      padding: 4px 10px;
      border-radius: 4px;
      font-size: 12px;
      font-weight: 600;
      background: #ecfdf5;
      color: #065f46;
    }

    /* 案例展示区（含图片） */
    .showcase-grid {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 24px;
    }

    .showcase-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
    }

    .showcase-img-wrap {
      width: 100%;
      background: #e2e8f0;
      overflow: hidden;
    }

    .showcase-img-wrap img {
      width: 100%;
      height: auto;
      display: block;
      transition: transform 0.3s ease;
    }

    .showcase-card:hover .showcase-img-wrap img {
      transform: scale(1.02);
    }

    .showcase-body {
      padding: 20px;
    }

    .showcase-title {
      font-size: 16px;
      font-weight: 700;
      margin-bottom: 6px;
      color: var(--text-main);
    }

    .showcase-desc {
      font-size: 13px;
      color: var(--text-muted);
    }

    .banner-gallery-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 16px;
      margin-top: 24px;
    }

    .banner-item {
      border-radius: var(--radius);
      overflow: hidden;
      border: 1px solid var(--border-color);
      background: #fff;
    }

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

    .testimonial-user {
      display: flex;
      align-items: center;
      gap: 12px;
      margin-bottom: 14px;
    }

    .avatar-icon {
      width: 42px;
      height: 42px;
      border-radius: 50%;
      background: linear-gradient(135deg, var(--primary), var(--accent-coral));
      color: #ffffff;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      font-size: 14px;
    }

    .user-info h4 {
      font-size: 15px;
      font-weight: 700;
      color: var(--text-main);
    }

    .user-info span {
      font-size: 12px;
      color: var(--text-muted);
    }

    .testimonial-text {
      font-size: 13px;
      color: var(--text-muted);
      line-height: 1.6;
      font-style: italic;
    }

    /* 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-color);
      border-radius: var(--radius);
      overflow: hidden;
      transition: border-color 0.2s ease;
    }

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

    .faq-question {
      padding: 18px 24px;
      cursor: pointer;
      display: flex;
      align-items: center;
      justify-content: space-between;
      font-weight: 700;
      font-size: 15px;
      color: var(--text-main);
      user-select: none;
    }

    .faq-question:hover {
      background-color: #f8fafc;
    }

    .faq-toggle-icon {
      font-size: 18px;
      color: var(--primary);
      transition: transform 0.2s ease;
    }

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

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

    .faq-item.active .faq-answer {
      max-height: 200px;
      padding: 16px 24px 20px;
      border-top: 1px solid var(--border-color);
    }

    .faq-answer p {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* 需求匹配与表单 */
    .form-layout-wrap {
      display: grid;
      grid-template-columns: 1fr 1.2fr;
      gap: 36px;
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      padding: 40px;
      box-shadow: var(--shadow-md);
    }

    .form-info-side {
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .contact-info-list {
      display: flex;
      flex-direction: column;
      gap: 16px;
      margin: 24px 0;
    }

    .contact-info-item {
      display: flex;
      align-items: center;
      gap: 12px;
      font-size: 14px;
      color: var(--text-muted);
    }

    .contact-info-item strong {
      color: var(--text-main);
      width: 90px;
    }

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

    .qr-container img {
      width: 90px;
      height: 90px;
      object-fit: contain;
      border-radius: 4px;
      border: 1px solid #e2e8f0;
    }

    .qr-desc h5 {
      font-size: 14px;
      font-weight: 700;
      margin-bottom: 4px;
    }

    .qr-desc p {
      font-size: 12px;
      color: var(--text-muted);
    }

    .site-form {
      display: flex;
      flex-direction: column;
      gap: 16px;
    }

    .form-group {
      display: flex;
      flex-direction: column;
      gap: 6px;
    }

    .form-label {
      font-size: 13px;
      font-weight: 600;
      color: var(--text-main);
    }

    .form-control {
      width: 100%;
      padding: 12px 14px;
      border: 1px solid var(--border-color);
      border-radius: 8px;
      font-size: 14px;
      color: var(--text-main);
      background: #f8fafc;
      transition: all 0.2s ease;
    }

    .form-control:focus {
      outline: none;
      border-color: var(--primary);
      background: #ffffff;
      box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.1);
    }

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

    /* 资讯与友情链接 */
    .links-block {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      padding: 24px;
      margin-top: 30px;
    }

    .links-block h4 {
      font-size: 15px;
      font-weight: 700;
      margin-bottom: 14px;
      color: var(--text-main);
    }

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

    .friend-links-wrap a,
    .article-links-wrap a {
      font-size: 13px;
      color: var(--text-muted);
      text-decoration: none;
      padding: 4px 10px;
      background: #f1f5f9;
      border-radius: 4px;
      transition: all 0.2s ease;
    }

    .friend-links-wrap a:hover,
    .article-links-wrap a:hover {
      color: var(--primary);
      background: #e0e7ff;
    }

    /* 页脚 */
    .site-footer {
      background: #ffffff;
      border-top: 1px solid var(--border-color);
      padding: 48px 0 24px;
      color: var(--text-muted);
      font-size: 13px;
    }

    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1fr;
      gap: 36px;
      margin-bottom: 36px;
    }

    .footer-col h5 {
      font-size: 15px;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 16px;
    }

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

    .footer-nav-list a {
      color: var(--text-muted);
      text-decoration: none;
      transition: color 0.2s ease;
    }

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

    .footer-bottom {
      border-top: 1px solid var(--border-color);
      padding-top: 24px;
      text-align: center;
      color: #94a3b8;
      font-size: 12px;
      display: flex;
      flex-direction: column;
      gap: 8px;
    }

    /* 浮动客服入口与返回顶部 */
    .float-tools {
      position: fixed;
      right: 20px;
      bottom: 30px;
      z-index: 999;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }

    .float-btn {
      width: 48px;
      height: 48px;
      border-radius: 50%;
      background: #ffffff;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-md);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 20px;
      color: var(--primary);
      cursor: pointer;
      text-decoration: none;
      transition: all 0.2s ease;
    }

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

    /* 响应式断点 */
    @media (max-width: 1024px) {
      .hero-title { font-size: 34px; }
      .cards-grid-4 { grid-template-columns: repeat(2, 1fr); }
      .cards-grid-3 { grid-template-columns: repeat(2, 1fr); }
      .process-flow { grid-template-columns: repeat(2, 1fr); }
      .footer-grid { grid-template-columns: 1fr 1fr; }
      .hero-metrics-grid { grid-template-columns: repeat(2, 1fr); }
      .banner-gallery-grid { grid-template-columns: repeat(2, 1fr); }
    }

    @media (max-width: 768px) {
      .nav-menu { display: none; }
      .nav-menu.active {
        display: flex;
        flex-direction: column;
        position: absolute;
        top: 72px;
        left: 0;
        right: 0;
        background: #ffffff;
        padding: 20px;
        border-bottom: 1px solid var(--border-color);
        box-shadow: var(--shadow-lg);
      }
      .nav-links { flex-direction: column; width: 100%; align-items: flex-start; }
      .nav-links a { width: 100%; padding: 10px; }
      .mobile-menu-btn { display: block; }
      .hero-title { font-size: 28px; }
      .cards-grid-3, .cards-grid-2, .showcase-grid { grid-template-columns: 1fr; }
      .form-layout-wrap { grid-template-columns: 1fr; padding: 24px; }
      .process-flow { grid-template-columns: 1fr; }
      .hero-metrics-grid { grid-template-columns: 1fr; }
      .footer-grid { grid-template-columns: 1fr; }
      .banner-gallery-grid { grid-template-columns: 1fr; }
    }