:root {
      --primary-blue: #0b57d0;
      --vibrant-blue: #1a73e8;
      --dark-blue: #082b6b;
      --light-blue-bg: #f4f8fe;
      --accent-cyan: #00d2ff;
      --accent-orange: #ff6d00;
      --text-main: #1f2937;
      --text-muted: #4b5563;
      --text-light: #6b7280;
      --bg-white: #ffffff;
      --border-color: #e2e8f0;
      --border-hover: #93c5fd;
      --shadow-sm: 0 2px 8px rgba(11, 87, 208, 0.06);
      --shadow-md: 0 8px 24px rgba(11, 87, 208, 0.1);
      --shadow-lg: 0 16px 36px rgba(11, 87, 208, 0.15);
      --radius-sm: 6px;
      --radius-md: 12px;
      --radius-lg: 18px;
    }

    * {
      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: var(--light-blue-bg);
      color: var(--text-main);
      line-height: 1.65;
      overflow-x: hidden;
      -webkit-font-smoothing: antialiased;
    }

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

    ul, ol {
      list-style: none;
    }

    .container {
      width: 100%;
      max-width: 1240px;
      margin: 0 auto;
      padding: 0 20px;
    }

    .section-padding {
      padding: 72px 0;
    }

    .section-header {
      text-align: center;
      margin-bottom: 48px;
    }

    .section-badge {
      display: inline-block;
      font-size: 0.85rem;
      font-weight: 700;
      color: var(--vibrant-blue);
      background: rgba(26, 115, 232, 0.1);
      padding: 5px 14px;
      border-radius: 20px;
      margin-bottom: 12px;
      letter-spacing: 1px;
    }

    .section-title {
      font-size: 2.1rem;
      font-weight: 800;
      color: var(--dark-blue);
      letter-spacing: -0.5px;
      margin-bottom: 12px;
    }

    .section-subtitle {
      font-size: 1rem;
      color: var(--text-muted);
      max-width: 720px;
      margin: 0 auto;
    }

    /* 顶部导航 */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(255, 255, 255, 0.95);
      backdrop-filter: blur(10px);
      border-bottom: 1px solid var(--border-color);
      box-shadow: 0 2px 10px rgba(0, 0, 0, 0.03);
    }

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

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

    .logo-area img {
      max-height: 42px;
      width: auto;
      display: block;
    }

    .logo-text {
      font-size: 1.3rem;
      font-weight: 800;
      color: var(--primary-blue);
      letter-spacing: -0.5px;
    }

    .nav-links {
      display: flex;
      align-items: center;
      gap: 0;
    }

    .nav-links a {
      font-size: 0.95rem;
      font-weight: 600;
      color: var(--text-muted);
      padding: 8px 14px;
      border-radius: var(--radius-sm);
    }

    .nav-links a:hover {
      color: var(--primary-blue);
      background: rgba(11, 87, 208, 0.05);
    }

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

    .btn-nav-home {
      display: inline-flex;
      align-items: center;
      font-weight: 600;
      font-size: 0.9rem;
      padding: 7px 14px;
      color: var(--text-muted);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-sm);
    }

    .btn-nav-home:hover {
      border-color: var(--vibrant-blue);
      color: var(--vibrant-blue);
    }

    .btn-portal {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      background: linear-gradient(135deg, var(--vibrant-blue), var(--primary-blue));
      color: #ffffff !important;
      font-weight: 700;
      font-size: 0.9rem;
      padding: 9px 20px;
      border-radius: var(--radius-sm);
      box-shadow: 0 4px 12px rgba(11, 87, 208, 0.25);
    }

    .btn-portal:hover {
      transform: translateY(-1px);
      box-shadow: 0 6px 16px rgba(11, 87, 208, 0.35);
    }

    .nav-toggle {
      display: none;
      background: none;
      border: none;
      cursor: pointer;
      padding: 6px;
    }

    .nav-toggle span {
      display: block;
      width: 24px;
      height: 2px;
      background: var(--text-main);
      margin: 5px 0;
      transition: 0.3s;
    }

    /* Hero 首屏 (无图片) */
    .hero-section {
      position: relative;
      padding: 84px 0 72px 0;
      background: linear-gradient(180deg, #ffffff 0%, #edf4fe 100%);
      border-bottom: 1px solid #e2eaf6;
      overflow: hidden;
    }

    .hero-bg-shapes {
      position: absolute;
      top: 0;
      left: 0;
      right: 0;
      bottom: 0;
      pointer-events: none;
      overflow: hidden;
    }

    .shape-circle {
      position: absolute;
      width: 460px;
      height: 460px;
      border-radius: 50%;
      background: radial-gradient(circle, rgba(26, 115, 232, 0.12) 0%, rgba(255,255,255,0) 70%);
      top: -120px;
      right: -80px;
    }

    .shape-grid {
      position: absolute;
      width: 100%;
      height: 100%;
      background-image: radial-gradient(rgba(11, 87, 208, 0.08) 1px, transparent 1px);
      background-size: 28px 28px;
      opacity: 0.7;
    }

    .hero-content {
      position: relative;
      z-index: 2;
      text-align: center;
      max-width: 960px;
      margin: 0 auto;
    }

    .hero-badge {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      background: #ffffff;
      border: 1px solid #c7dcfb;
      padding: 6px 18px;
      border-radius: 30px;
      color: var(--primary-blue);
      font-size: 0.9rem;
      font-weight: 700;
      box-shadow: var(--shadow-sm);
      margin-bottom: 20px;
    }

    .hero-badge-dot {
      width: 8px;
      height: 8px;
      border-radius: 50%;
      background: #10b981;
      display: inline-block;
      animation: pulse 1.8s infinite;
    }

    @keyframes pulse {
      0% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.7); }
      70% { transform: scale(1); box-shadow: 0 0 0 8px rgba(16, 185, 129, 0); }
      100% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(16, 185, 129, 0); }
    }

    .hero-title {
      font-size: 2.6rem;
      font-weight: 900;
      line-height: 1.25;
      color: var(--dark-blue);
      margin-bottom: 18px;
      letter-spacing: -1px;
    }

    .hero-desc {
      font-size: 1.15rem;
      color: var(--text-muted);
      margin-bottom: 32px;
      max-width: 780px;
      margin-left: auto;
      margin-right: auto;
    }

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

    .btn-hero-primary {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      font-size: 1.05rem;
      font-weight: 700;
      padding: 14px 34px;
      color: #ffffff;
      background: linear-gradient(135deg, #1a73e8 0%, #0b57d0 100%);
      border-radius: var(--radius-md);
      box-shadow: 0 8px 20px rgba(11, 87, 208, 0.35);
      border: 1px solid rgba(255, 255, 255, 0.2);
    }

    .btn-hero-primary:hover {
      transform: translateY(-2px);
      box-shadow: 0 12px 28px rgba(11, 87, 208, 0.45);
      color: #ffffff;
    }

    .btn-hero-secondary {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      font-size: 1.05rem;
      font-weight: 700;
      padding: 14px 28px;
      color: var(--primary-blue);
      background: #ffffff;
      border: 1px solid #bfdbfe;
      border-radius: var(--radius-md);
      box-shadow: var(--shadow-sm);
    }

    .btn-hero-secondary:hover {
      background: #f0f7ff;
      border-color: var(--vibrant-blue);
    }

    .hero-stats-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 16px;
      text-align: left;
    }

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

    .stat-card-title {
      font-size: 0.85rem;
      font-weight: 600;
      color: var(--text-light);
      margin-bottom: 6px;
    }

    .stat-card-value {
      font-size: 1.6rem;
      font-weight: 800;
      color: var(--primary-blue);
      line-height: 1.2;
    }

    .stat-card-desc {
      font-size: 0.8rem;
      color: var(--text-muted);
      margin-top: 4px;
    }

    /* 平台支持模型标签流 */
    .models-marquee-section {
      background: #ffffff;
      padding: 24px 0;
      border-bottom: 1px solid var(--border-color);
    }

    .models-label {
      font-size: 0.85rem;
      font-weight: 700;
      color: var(--text-muted);
      text-align: center;
      margin-bottom: 14px;
    }

    .models-tag-container {
      display: flex;
      flex-wrap: wrap;
      justify-content: center;
      gap: 8px;
      max-width: 1140px;
      margin: 0 auto;
    }

    .model-chip {
      background: #f1f6fd;
      border: 1px solid #d5e5fa;
      color: var(--dark-blue);
      font-size: 0.8rem;
      font-weight: 600;
      padding: 4px 10px;
      border-radius: 6px;
      transition: all 0.2s ease;
    }

    .model-chip:hover {
      background: var(--vibrant-blue);
      color: #ffffff;
      border-color: var(--vibrant-blue);
    }

    /* 卡片网格通用 */
    .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: 28px;
    }

    .feature-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 28px 24px;
      box-shadow: var(--shadow-sm);
      transition: all 0.3s ease;
      position: relative;
    }

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

    .feature-icon-box {
      width: 48px;
      height: 48px;
      background: #ebf3fe;
      color: var(--primary-blue);
      border-radius: 10px;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.4rem;
      font-weight: 800;
      margin-bottom: 18px;
    }

    .feature-card h3 {
      font-size: 1.15rem;
      font-weight: 700;
      color: var(--dark-blue);
      margin-bottom: 10px;
    }

    .feature-card p {
      font-size: 0.9rem;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* 平台介绍分栏 */
    .about-wrapper {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 40px;
      box-shadow: var(--shadow-sm);
    }

    .about-list {
      margin-top: 20px;
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 16px;
    }

    .about-item {
      display: flex;
      align-items: flex-start;
      gap: 12px;
      font-size: 0.92rem;
      color: var(--text-main);
    }

    .about-item-dot {
      width: 18px;
      height: 18px;
      background: #dbeafe;
      color: var(--vibrant-blue);
      border-radius: 50%;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      font-size: 0.75rem;
      font-weight: 800;
      flex-shrink: 0;
      margin-top: 3px;
    }

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

    .compare-score-header {
      background: linear-gradient(135deg, #0b57d0, #1a73e8);
      color: #ffffff;
      padding: 30px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      flex-wrap: wrap;
      gap: 20px;
    }

    .score-badge-area h3 {
      font-size: 1.6rem;
      font-weight: 800;
      margin-bottom: 6px;
    }

    .score-badge-area p {
      color: #dbeafe;
      font-size: 0.95rem;
    }

    .score-digits {
      text-align: right;
      background: rgba(255, 255, 255, 0.15);
      padding: 14px 24px;
      border-radius: var(--radius-md);
      backdrop-filter: blur(5px);
    }

    .score-num {
      font-size: 2.2rem;
      font-weight: 900;
      color: #ffeb3b;
      line-height: 1;
    }

    .score-stars {
      color: #ffc107;
      font-size: 1.1rem;
      margin-top: 4px;
    }

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

    .compare-table th, .compare-table td {
      padding: 16px 20px;
      border-bottom: 1px solid var(--border-color);
      font-size: 0.9rem;
    }

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

    .compare-table td.highlight {
      background: #f0f7ff;
      color: var(--primary-blue);
      font-weight: 700;
    }

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

    .step-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 24px 20px;
      position: relative;
      box-shadow: var(--shadow-sm);
    }

    .step-num {
      font-size: 1.8rem;
      font-weight: 900;
      color: #bfdbfe;
      line-height: 1;
      margin-bottom: 12px;
    }

    .step-card h4 {
      font-size: 1.05rem;
      font-weight: 700;
      color: var(--dark-blue);
      margin-bottom: 8px;
    }

    .step-card p {
      font-size: 0.85rem;
      color: var(--text-muted);
    }

    /* 案例展示 */
    .media-card {
      background: #ffffff;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
    }

    .media-card-img-wrap {
      width: 100%;
      background: #e2e8f0;
      display: flex;
      align-items: center;
      justify-content: center;
      overflow: hidden;
    }

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

    .media-card:hover .media-card-img-wrap img {
      transform: scale(1.03);
    }

    .media-card-body {
      padding: 20px;
    }

    .media-card-body h4 {
      font-size: 1.05rem;
      font-weight: 700;
      color: var(--dark-blue);
      margin-bottom: 8px;
    }

    .media-card-body p {
      font-size: 0.85rem;
      color: var(--text-muted);
    }

    /* 用户评论 */
    .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-card p {
      font-size: 0.9rem;
      color: var(--text-main);
      margin-bottom: 16px;
      font-style: italic;
    }

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

    .testimonial-avatar {
      width: 40px;
      height: 40px;
      border-radius: 50%;
      background: #dbeafe;
      color: var(--primary-blue);
      font-weight: 800;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 0.9rem;
    }

    .testimonial-name {
      font-size: 0.9rem;
      font-weight: 700;
      color: var(--dark-blue);
    }

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

    /* Token比价卡片 */
    .pricing-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .pricing-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 32px 24px;
      text-align: center;
      box-shadow: var(--shadow-sm);
      position: relative;
      transition: 0.3s;
    }

    .pricing-card.popular {
      border: 2px solid var(--vibrant-blue);
      box-shadow: var(--shadow-md);
    }

    .pricing-tag {
      position: absolute;
      top: -12px;
      left: 50%;
      transform: translateX(-50%);
      background: var(--vibrant-blue);
      color: #ffffff;
      font-size: 0.75rem;
      font-weight: 700;
      padding: 4px 14px;
      border-radius: 20px;
    }

    .pricing-name {
      font-size: 1.25rem;
      font-weight: 800;
      color: var(--dark-blue);
      margin-bottom: 8px;
    }

    .pricing-price {
      font-size: 2.2rem;
      font-weight: 900;
      color: var(--primary-blue);
      margin-bottom: 16px;
    }

    .pricing-price span {
      font-size: 0.9rem;
      font-weight: 500;
      color: var(--text-light);
    }

    .pricing-features {
      text-align: left;
      margin-bottom: 24px;
      border-top: 1px solid #f1f5f9;
      padding-top: 16px;
    }

    .pricing-features li {
      font-size: 0.88rem;
      color: var(--text-muted);
      margin-bottom: 10px;
      display: flex;
      align-items: center;
      gap: 8px;
    }

    /* 表单与需求匹配 */
    .form-wrapper {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 40px;
      box-shadow: var(--shadow-md);
      max-width: 860px;
      margin: 0 auto;
    }

    .form-grid {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 20px;
      margin-bottom: 20px;
    }

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

    .form-group.full {
      grid-column: span 2;
    }

    .form-label {
      font-size: 0.88rem;
      font-weight: 700;
      color: var(--dark-blue);
    }

    .form-control {
      width: 100%;
      padding: 12px 14px;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-sm);
      font-size: 0.92rem;
      color: var(--text-main);
      outline: none;
      transition: border-color 0.2s ease;
      background: #fafafa;
    }

    .form-control:focus {
      border-color: var(--vibrant-blue);
      background: #ffffff;
    }

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

    .btn-submit {
      width: 100%;
      background: linear-gradient(135deg, var(--vibrant-blue), var(--primary-blue));
      color: #ffffff;
      font-size: 1.05rem;
      font-weight: 700;
      padding: 14px;
      border: none;
      border-radius: var(--radius-sm);
      cursor: pointer;
      transition: all 0.25s ease;
    }

    .btn-submit:hover {
      opacity: 0.95;
      transform: translateY(-1px);
    }

    /* FAQ 折叠面板 */
    .faq-container {
      max-width: 900px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      gap: 12px;
    }

    .faq-item {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      overflow: hidden;
      transition: border-color 0.2s;
    }

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

    .faq-question {
      padding: 18px 20px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      cursor: pointer;
      font-weight: 700;
      font-size: 0.98rem;
      color: var(--dark-blue);
      background: #ffffff;
    }

    .faq-icon {
      font-size: 1.2rem;
      font-weight: 400;
      color: var(--vibrant-blue);
      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, padding 0.3s ease;
      background: #f8fafc;
      padding: 0 20px;
    }

    .faq-item.active .faq-answer {
      max-height: 200px;
      padding: 16px 20px;
      border-top: 1px solid #f1f5f9;
    }

    .faq-answer p {
      font-size: 0.9rem;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* 资讯文章与百科 */
    .article-link-list {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 14px;
    }

    .article-item {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-sm);
      padding: 14px 18px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      transition: all 0.2s;
    }

    .article-item:hover {
      border-color: var(--vibrant-blue);
      background: #f0f7ff;
    }

    .article-item span {
      font-size: 0.9rem;
      font-weight: 600;
      color: var(--dark-blue);
    }

    .article-item time {
      font-size: 0.8rem;
      color: var(--text-light);
    }

    /* 底部链接与页脚 */
    .site-footer {
      background: #ffffff;
      border-top: 1px solid var(--border-color);
      padding: 56px 0 28px 0;
      color: var(--text-main);
    }

    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1.5fr;
      gap: 36px;
      margin-bottom: 40px;
    }

    .footer-brand h4 {
      font-size: 1.3rem;
      font-weight: 800;
      color: var(--primary-blue);
      margin-bottom: 12px;
    }

    .footer-brand p {
      font-size: 0.88rem;
      color: var(--text-muted);
      line-height: 1.6;
      margin-bottom: 16px;
    }

    .footer-column h5 {
      font-size: 1rem;
      font-weight: 700;
      color: var(--dark-blue);
      margin-bottom: 16px;
    }

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

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

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

    .footer-qr {
      text-align: left;
    }

    .footer-qr-img {
      max-width: 110px;
      border-radius: var(--radius-sm);
      border: 1px solid var(--border-color);
      display: block;
      margin-bottom: 8px;
    }

    .footer-qr-text {
      font-size: 0.8rem;
      color: var(--text-light);
    }

    .footer-bottom {
      border-top: 1px solid var(--border-color);
      padding-top: 24px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      flex-wrap: wrap;
      gap: 12px;
      font-size: 0.82rem;
      color: var(--text-light);
    }

    .friend-links-area {
      margin-bottom: 30px;
      padding: 18px 20px;
      background: #f8fafc;
      border-radius: var(--radius-sm);
      border: 1px solid var(--border-color);
    }

    .friend-links-title {
      font-size: 0.85rem;
      font-weight: 700;
      color: var(--dark-blue);
      margin-bottom: 10px;
    }

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

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

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

    /* 浮动客服 */
    .float-kefu {
      position: fixed;
      right: 20px;
      bottom: 30px;
      z-index: 999;
      background: #ffffff;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-lg);
      border-radius: 30px;
      padding: 8px 16px;
      display: flex;
      align-items: center;
      gap: 8px;
      cursor: pointer;
      transition: all 0.25s ease;
    }

    .float-kefu:hover {
      transform: translateY(-3px);
      box-shadow: 0 10px 25px rgba(11, 87, 208, 0.25);
    }

    .float-kefu-icon {
      width: 10px;
      height: 10px;
      border-radius: 50%;
      background: #10b981;
    }

    .float-kefu span {
      font-size: 0.88rem;
      font-weight: 700;
      color: var(--primary-blue);
    }

    /* 响应式断点 */
    @media (max-width: 1024px) {
      .hero-title { font-size: 2.1rem; }
      .grid-3, .grid-4, .pricing-grid, .step-grid { grid-template-columns: repeat(2, 1fr); }
      .footer-grid { grid-template-columns: repeat(2, 1fr); }
      .hero-stats-grid { grid-template-columns: repeat(2, 1fr); }
    }

    @media (max-width: 768px) {
      .nav-links {
        display: none;
        position: absolute;
        top: 72px;
        left: 0;
        right: 0;
        background: #ffffff;
        flex-direction: column;
        align-items: flex-start;
        padding: 16px 20px;
        border-bottom: 1px solid var(--border-color);
        box-shadow: var(--shadow-md);
      }
      .nav-links.show { display: flex; }
      .nav-toggle { display: block; }
      .hero-title { font-size: 1.75rem; }
      .section-title { font-size: 1.6rem; }
      .grid-3, .grid-4, .grid-2, .pricing-grid, .step-grid, .about-list, .form-grid, .article-link-list {
        grid-template-columns: 1fr;
      }
      .form-group.full { grid-column: span 1; }
      .footer-grid { grid-template-columns: 1fr; }
      .hero-stats-grid { grid-template-columns: 1fr; }
      .compare-score-header { flex-direction: column; text-align: center; }
      .score-digits { text-align: center; width: 100%; }
      .compare-table { display: block; overflow-x: auto; white-space: nowrap; }
    }