:root {
      --primary: #ff3366;
      --primary-dark: #d61f4f;
      --accent: #ff6600;
      --vibrant-blue: #0066ff;
      --vibrant-purple: #7928ca;
      --vibrant-cyan: #00dfd8;
      --bg-page: #fbfbfd;
      --bg-card: #ffffff;
      --text-main: #18191f;
      --text-muted: #535868;
      --border-color: #edeef4;
      --container-max: 1200px;
      --radius-sm: 8px;
      --radius-md: 16px;
      --radius-lg: 24px;
      --shadow-sm: 0 4px 12px rgba(255, 51, 102, 0.06);
      --shadow-md: 0 10px 30px rgba(0, 102, 255, 0.08);
      --shadow-lg: 0 18px 45px rgba(121, 40, 202, 0.12);
    }
    * {
      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(--bg-page);
      color: var(--text-main);
      line-height: 1.6;
      overflow-x: hidden;
      background-image: 
        radial-gradient(circle at 10% 10%, rgba(255, 51, 102, 0.05) 0%, transparent 40%),
        radial-gradient(circle at 90% 30%, rgba(0, 102, 255, 0.05) 0%, transparent 45%),
        radial-gradient(circle at 50% 80%, rgba(255, 102, 0, 0.04) 0%, transparent 50%);
      background-attachment: fixed;
    }
    a {
      text-decoration: none;
      color: inherit;
      transition: all 0.25s ease;
    }
    ul, ol {
      list-style: none;
    }
    img {
      max-width: 100%;
      height: auto;
      display: block;
    }
    .container {
      width: 100%;
      max-width: var(--container-max);
      margin: 0 auto;
      padding: 0 24px;
    }
    
    /* 顶部导航 */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(255, 255, 255, 0.95);
      backdrop-filter: blur(12px);
      border-bottom: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
    }
    .nav-wrap {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 76px;
    }
    .brand-box {
      display: flex;
      align-items: center;
      gap: 12px;
      text-decoration: none;
    }
    .brand-logo-wrap {
      max-height: 44px;
      display: flex;
      align-items: center;
    }
    .ai-page-logo {
      height: 40px;
      width: auto;
      object-fit: contain;
    }
    .brand-text-wrap {
      display: flex;
      flex-direction: column;
    }
    .brand-title {
      font-size: 1.25rem;
      font-weight: 800;
      color: #111;
      line-height: 1.2;
      background: linear-gradient(90deg, #ff3366, #7928ca);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }
    .brand-subtitle {
      font-size: 0.72rem;
      color: var(--text-muted);
      letter-spacing: 0.5px;
    }
    .nav-links {
      display: flex;
      align-items: center;
      gap: 0;
    }
    .nav-links li a {
      font-size: 0.95rem;
      font-weight: 600;
      color: var(--text-main);
      padding: 10px 14px;
      border-radius: var(--radius-sm);
      display: inline-block;
      transition: color 0.2s, background-color 0.2s;
    }
    .nav-links li a:hover {
      color: var(--primary);
      background: rgba(255, 51, 102, 0.08);
    }
    .nav-action-btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      background: linear-gradient(135deg, #ff3366 0%, #ff6600 100%);
      color: #ffffff !important;
      padding: 10px 22px;
      font-size: 0.95rem;
      font-weight: 700;
      border-radius: 40px;
      box-shadow: 0 4px 15px rgba(255, 51, 102, 0.35);
      border: none;
      cursor: pointer;
    }
    .nav-action-btn:hover {
      box-shadow: 0 6px 20px rgba(255, 51, 102, 0.5);
      transform: translateY(-2px);
    }
    .menu-toggle {
      display: none;
      background: none;
      border: none;
      cursor: pointer;
      padding: 8px;
    }
    .menu-toggle span {
      display: block;
      width: 24px;
      height: 2.5px;
      background-color: var(--text-main);
      margin: 5px 0;
      transition: all 0.3s ease;
    }

    /* 艳彩几何装饰条块 */
    .color-pill {
      display: inline-block;
      padding: 6px 16px;
      font-size: 0.85rem;
      font-weight: 700;
      border-radius: 30px;
      background: linear-gradient(90deg, rgba(255, 51, 102, 0.12), rgba(0, 102, 255, 0.12));
      color: var(--primary);
      border: 1px solid rgba(255, 51, 102, 0.2);
      margin-bottom: 16px;
    }
    .section-title-wrap {
      text-align: center;
      max-width: 820px;
      margin: 0 auto 56px auto;
    }
    .section-title {
      font-size: 2.25rem;
      font-weight: 800;
      color: #11142d;
      margin-bottom: 16px;
      letter-spacing: -0.5px;
    }
    .section-subtitle {
      font-size: 1.05rem;
      color: var(--text-muted);
      line-height: 1.7;
    }

    /* 首屏 Hero（严禁出现任何图片） */
    .hero-section {
      padding: 80px 0 60px 0;
      position: relative;
    }
    .hero-content {
      text-align: center;
      max-width: 980px;
      margin: 0 auto;
    }
    .hero-h1 {
      font-size: 2.85rem;
      font-weight: 900;
      line-height: 1.25;
      margin-bottom: 24px;
      color: #11142d;
      letter-spacing: -1px;
    }
    .hero-gradient-text {
      background: linear-gradient(120deg, #ff3366 10%, #7928ca 50%, #0066ff 90%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      display: inline-block;
    }
    .hero-desc {
      font-size: 1.25rem;
      color: var(--text-muted);
      line-height: 1.8;
      margin-bottom: 36px;
      font-weight: 500;
    }
    .hero-btn-group {
      display: flex;
      align-items: center;
      justify-content: center;
      gap: 20px;
      margin-bottom: 50px;
      flex-wrap: wrap;
    }
    .btn-main-action {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 16px 42px;
      background: linear-gradient(135deg, #ff3366 0%, #ff6600 100%);
      color: #ffffff;
      font-size: 1.15rem;
      font-weight: 800;
      border-radius: 50px;
      box-shadow: 0 10px 30px rgba(255, 51, 102, 0.4);
      transition: all 0.3s ease;
      border: none;
    }
    .btn-main-action:hover {
      transform: translateY(-3px) scale(1.02);
      box-shadow: 0 15px 35px rgba(255, 51, 102, 0.55);
      color: #fff;
    }
    .btn-sub-action {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 16px 36px;
      background: #ffffff;
      color: var(--vibrant-blue);
      font-size: 1.15rem;
      font-weight: 700;
      border-radius: 50px;
      border: 2px solid rgba(0, 102, 255, 0.3);
      box-shadow: var(--shadow-sm);
      transition: all 0.3s ease;
    }
    .btn-sub-action:hover {
      border-color: var(--vibrant-blue);
      background: rgba(0, 102, 255, 0.05);
      transform: translateY(-3px);
    }
    .hero-metrics-bar {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      background: #ffffff;
      padding: 28px;
      border-radius: var(--radius-md);
      box-shadow: var(--shadow-md);
      border: 1px solid var(--border-color);
      border-top: 4px solid var(--primary);
    }
    .metric-item {
      text-align: center;
      position: relative;
    }
    .metric-item:not(:last-child)::after {
      content: "";
      position: absolute;
      right: 0;
      top: 15%;
      height: 70%;
      width: 1px;
      background-color: var(--border-color);
    }
    .metric-value {
      font-size: 2.2rem;
      font-weight: 900;
      line-height: 1.1;
      margin-bottom: 6px;
    }
    .metric-c1 { color: #ff3366; }
    .metric-c2 { color: #0066ff; }
    .metric-c3 { color: #7928ca; }
    .metric-c4 { color: #ff6600; }
    .metric-label {
      font-size: 0.9rem;
      color: var(--text-muted);
      font-weight: 600;
    }

    /* 模块通用边距 */
    .section-wrap {
      padding: 70px 0;
    }

    /* 模型矩阵与标签云 */
    .models-marquee-card {
      background: #ffffff;
      border-radius: var(--radius-md);
      padding: 32px;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
    }
    .model-tags-container {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
      justify-content: center;
    }
    .model-tag {
      padding: 8px 18px;
      border-radius: 30px;
      font-size: 0.92rem;
      font-weight: 700;
      background: #f4f5fa;
      color: #2b3040;
      border: 1px solid #e1e4ed;
      transition: all 0.25s ease;
    }
    .model-tag:hover {
      background: linear-gradient(135deg, #ff3366, #ff6600);
      color: #ffffff;
      border-color: transparent;
      transform: translateY(-2px);
    }

    /* 关于我们 / 平台介绍 */
    .intro-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .intro-card {
      background: #ffffff;
      padding: 32px 28px;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
      transition: all 0.3s ease;
      position: relative;
      overflow: hidden;
    }
    .intro-card:hover {
      transform: translateY(-6px);
      box-shadow: var(--shadow-md);
      border-color: rgba(255, 51, 102, 0.4);
    }
    .intro-card::before {
      content: "";
      position: absolute;
      top: 0;
      left: 0;
      right: 0;
      height: 4px;
      background: linear-gradient(90deg, #ff3366, #ff6600);
    }
    .intro-card-title {
      font-size: 1.25rem;
      font-weight: 700;
      color: #11142d;
      margin-bottom: 12px;
      display: flex;
      align-items: center;
      gap: 10px;
    }
    .intro-icon {
      width: 32px;
      height: 32px;
      border-radius: 8px;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      color: #ffffff;
      font-weight: 900;
      font-size: 0.95rem;
      flex-shrink: 0;
    }
    .icon-bg1 { background: linear-gradient(135deg, #ff3366, #ff6600); }
    .icon-bg2 { background: linear-gradient(135deg, #0066ff, #00dfd8); }
    .icon-bg3 { background: linear-gradient(135deg, #7928ca, #ff0080); }
    .intro-desc {
      font-size: 0.95rem;
      color: var(--text-muted);
      line-height: 1.7;
    }

    /* AIGC 服务场景矩阵 */
    .services-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .service-box {
      background: #ffffff;
      border-radius: var(--radius-md);
      padding: 28px;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
      transition: all 0.3s ease;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }
    .service-box:hover {
      transform: translateY(-5px);
      box-shadow: var(--shadow-md);
      border-color: rgba(0, 102, 255, 0.4);
    }
    .service-tag {
      font-size: 0.78rem;
      font-weight: 700;
      color: var(--vibrant-purple);
      background: rgba(121, 40, 202, 0.08);
      padding: 4px 10px;
      border-radius: 20px;
      display: inline-block;
      margin-bottom: 14px;
      width: fit-content;
    }
    .service-title {
      font-size: 1.2rem;
      font-weight: 700;
      color: #11142d;
      margin-bottom: 10px;
    }
    .service-detail {
      font-size: 0.92rem;
      color: var(--text-muted);
      line-height: 1.65;
    }

    /* 横版素材与图文混排 */
    .media-feature-block {
      background: #ffffff;
      border-radius: var(--radius-lg);
      padding: 36px;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-md);
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 36px;
      align-items: center;
      margin-bottom: 36px;
    }
    .media-img-wrap {
      border-radius: var(--radius-md);
      overflow: hidden;
      box-shadow: 0 8px 24px rgba(0,0,0,0.08);
    }
    .media-info-wrap h3 {
      font-size: 1.8rem;
      font-weight: 800;
      color: #11142d;
      margin-bottom: 16px;
    }
    .media-info-wrap p {
      font-size: 1rem;
      color: var(--text-muted);
      line-height: 1.75;
      margin-bottom: 20px;
    }
    .feature-list-bullet {
      display: flex;
      flex-direction: column;
      gap: 12px;
    }
    .bullet-item {
      display: flex;
      align-items: center;
      gap: 10px;
      font-weight: 600;
      color: #2b3040;
    }
    .bullet-dot {
      width: 10px;
      height: 10px;
      border-radius: 50%;
      background: var(--primary);
    }

    /* 标准流程时间线 */
    .process-steps-wrap {
      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: 30px 24px;
      position: relative;
      box-shadow: var(--shadow-sm);
    }
    .step-number {
      font-size: 2.5rem;
      font-weight: 900;
      line-height: 1;
      margin-bottom: 14px;
      background: linear-gradient(135deg, #ff3366, #ff6600);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }
    .step-title {
      font-size: 1.15rem;
      font-weight: 700;
      color: #11142d;
      margin-bottom: 8px;
    }
    .step-desc {
      font-size: 0.9rem;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* 对比评测规范板块 */
    .evaluation-badge-box {
      background: linear-gradient(135deg, #11142d 0%, #20263f 100%);
      color: #ffffff;
      padding: 40px;
      border-radius: var(--radius-lg);
      margin-bottom: 30px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      flex-wrap: wrap;
      gap: 24px;
      box-shadow: var(--shadow-lg);
    }
    .eval-score-left h3 {
      font-size: 1.8rem;
      font-weight: 800;
      margin-bottom: 8px;
    }
    .eval-score-left p {
      color: #a0aec0;
      font-size: 1rem;
    }
    .eval-score-right {
      display: flex;
      align-items: center;
      gap: 30px;
    }
    .star-rating-box {
      text-align: right;
    }
    .stars-text {
      color: #ffb800;
      font-size: 1.8rem;
      font-weight: 900;
      letter-spacing: 2px;
      line-height: 1;
    }
    .star-label {
      font-size: 0.9rem;
      color: #cbd5e0;
      margin-top: 4px;
    }
    .score-circle {
      width: 100px;
      height: 100px;
      border-radius: 50%;
      background: linear-gradient(135deg, #ff3366, #ff6600);
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: center;
      box-shadow: 0 6px 20px rgba(255, 51, 102, 0.4);
    }
    .score-num {
      font-size: 2.2rem;
      font-weight: 900;
      line-height: 1;
    }
    .score-total {
      font-size: 0.75rem;
      font-weight: 600;
      opacity: 0.9;
    }
    .compare-table-container {
      background: #ffffff;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
      overflow-x: auto;
    }
    .custom-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
    }
    .custom-table th, .custom-table td {
      padding: 16px 20px;
      border-bottom: 1px solid var(--border-color);
      font-size: 0.92rem;
    }
    .custom-table th {
      background: #f9fafc;
      font-weight: 700;
      color: #11142d;
    }
    .highlight-col {
      background: rgba(255, 51, 102, 0.03);
      font-weight: 700;
      color: var(--primary);
    }

    /* 客户评价板块（6条） */
    .reviews-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .review-card {
      background: #ffffff;
      border-radius: var(--radius-md);
      padding: 28px;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
      transition: all 0.3s ease;
    }
    .review-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-md);
      border-color: rgba(255, 51, 102, 0.3);
    }
    .review-stars {
      color: #ff9900;
      font-size: 1rem;
      margin-bottom: 12px;
    }
    .review-content {
      font-size: 0.93rem;
      color: var(--text-muted);
      line-height: 1.7;
      margin-bottom: 20px;
      font-style: italic;
    }
    .review-user-info {
      display: flex;
      align-items: center;
      gap: 12px;
      border-top: 1px solid #f0f1f6;
      padding-top: 14px;
    }
    .user-avatar-tag {
      width: 42px;
      height: 42px;
      border-radius: 50%;
      background: linear-gradient(135deg, #0066ff, #7928ca);
      color: #ffffff;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 800;
      font-size: 1rem;
      flex-shrink: 0;
    }
    .user-name {
      font-size: 0.95rem;
      font-weight: 700;
      color: #11142d;
    }
    .user-role {
      font-size: 0.8rem;
      color: var(--text-muted);
    }

    /* 需求匹配与表单区 */
    .contact-form-section {
      background: #ffffff;
      border-radius: var(--radius-lg);
      padding: 48px;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-md);
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 48px;
    }
    .contact-intro-side h3 {
      font-size: 2rem;
      font-weight: 800;
      color: #11142d;
      margin-bottom: 16px;
    }
    .contact-intro-side p {
      font-size: 1rem;
      color: var(--text-muted);
      line-height: 1.75;
      margin-bottom: 28px;
    }
    .contact-channel-item {
      display: flex;
      align-items: center;
      gap: 16px;
      margin-bottom: 16px;
      padding: 12px 18px;
      background: #f8f9fd;
      border-radius: var(--radius-sm);
    }
    .channel-title {
      font-size: 0.9rem;
      font-weight: 700;
      color: #11142d;
    }
    .channel-val {
      font-size: 0.9rem;
      color: var(--primary);
      font-weight: 600;
    }
    .form-box {
      display: flex;
      flex-direction: column;
      gap: 16px;
    }
    .form-group {
      display: flex;
      flex-direction: column;
      gap: 6px;
    }
    .form-label {
      font-size: 0.9rem;
      font-weight: 700;
      color: #2b3040;
    }
    .form-control {
      width: 100%;
      padding: 12px 16px;
      border: 1px solid #dcdfe6;
      border-radius: var(--radius-sm);
      font-size: 0.95rem;
      color: #111;
      outline: none;
      transition: border-color 0.2s;
    }
    .form-control:focus {
      border-color: var(--primary);
      box-shadow: 0 0 0 3px rgba(255, 51, 102, 0.1);
    }
    .btn-submit {
      padding: 14px 28px;
      background: linear-gradient(135deg, #ff3366 0%, #ff6600 100%);
      color: #ffffff;
      font-size: 1.05rem;
      font-weight: 700;
      border: none;
      border-radius: var(--radius-sm);
      cursor: pointer;
      box-shadow: 0 6px 18px rgba(255, 51, 102, 0.35);
      transition: all 0.25s ease;
      margin-top: 8px;
    }
    .btn-submit:hover {
      opacity: 0.95;
      transform: translateY(-2px);
    }

    /* FAQ 手风琴 */
    .faq-accordion {
      max-width: 900px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      gap: 14px;
    }
    .faq-item {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
      transition: all 0.25s ease;
    }
    .faq-item:hover {
      border-color: rgba(0, 102, 255, 0.3);
    }
    .faq-question {
      padding: 20px 24px;
      font-size: 1.05rem;
      font-weight: 700;
      color: #11142d;
      display: flex;
      align-items: center;
      justify-content: space-between;
      cursor: pointer;
      user-select: none;
    }
    .faq-icon-arrow {
      font-size: 1.2rem;
      color: var(--primary);
      transition: transform 0.3s ease;
    }
    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.35s ease, padding 0.35s ease;
      background: #fbfcfe;
    }
    .faq-answer-inner {
      padding: 0 24px 20px 24px;
      font-size: 0.95rem;
      color: var(--text-muted);
      line-height: 1.7;
    }
    .faq-item.active .faq-icon-arrow {
      transform: rotate(45deg);
    }
    .faq-item.active .faq-answer {
      max-height: 300px;
    }

    /* 行业资讯 & 最新文章 */
    .articles-block-card {
      background: #ffffff;
      border-radius: var(--radius-md);
      padding: 32px;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
    }
    .article-links-grid {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 16px;
      margin-top: 20px;
    }
    .article-anchor {
      display: flex;
      align-items: center;
      gap: 10px;
      padding: 12px 18px;
      background: #f8f9fd;
      border-radius: var(--radius-sm);
      font-size: 0.93rem;
      color: #2b3040;
      font-weight: 600;
      border: 1px solid transparent;
    }
    .article-anchor:hover {
      border-color: var(--vibrant-blue);
      color: var(--vibrant-blue);
      background: #ffffff;
    }

    /* 友情链接 */
    .friend-links-wrap {
      display: flex;
      flex-wrap: wrap;
      gap: 14px;
      align-items: center;
      padding: 20px 0;
    }
    .friend-links-wrap a {
      font-size: 0.88rem;
      color: var(--text-muted);
      padding: 6px 14px;
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: 20px;
    }
    .friend-links-wrap a:hover {
      color: var(--primary);
      border-color: var(--primary);
    }

    /* 紧凑规范页脚 */
    .site-footer {
      background: #11142d;
      color: #e2e8f0;
      padding: 56px 0 24px 0;
      border-top: 4px solid var(--primary);
    }
    .footer-top-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1.2fr;
      gap: 40px;
      padding-bottom: 40px;
      border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    }
    .footer-brand-desc {
      font-size: 0.92rem;
      color: #94a3b8;
      line-height: 1.7;
      margin: 16px 0 20px 0;
    }
    .footer-col-title {
      font-size: 1.05rem;
      font-weight: 700;
      color: #ffffff;
      margin-bottom: 16px;
      position: relative;
    }
    .footer-links-list li {
      margin-bottom: 10px;
    }
    .footer-links-list li a {
      color: #94a3b8;
      font-size: 0.9rem;
    }
    .footer-links-list li a:hover {
      color: #ffffff;
      padding-left: 4px;
    }
    .qr-container {
      display: flex;
      flex-direction: column;
      align-items: flex-start;
      gap: 10px;
    }
    .qr-img-box {
      width: 120px;
      height: 120px;
      background: #ffffff;
      padding: 6px;
      border-radius: 8px;
    }
    .footer-bottom-bar {
      padding-top: 24px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      font-size: 0.85rem;
      color: #64748b;
      flex-wrap: wrap;
      gap: 12px;
    }

    /* 浮动客服入口 */
    .floating-widget {
      position: fixed;
      right: 24px;
      bottom: 40px;
      z-index: 999;
      display: flex;
      flex-direction: column;
      gap: 12px;
    }
    .float-btn {
      width: 48px;
      height: 48px;
      border-radius: 50%;
      background: #ffffff;
      box-shadow: 0 4px 16px rgba(0,0,0,0.15);
      display: flex;
      align-items: center;
      justify-content: center;
      color: var(--primary);
      font-weight: 800;
      font-size: 1.2rem;
      cursor: pointer;
      border: 1px solid var(--border-color);
      transition: all 0.25s ease;
    }
    .float-btn:hover {
      background: var(--primary);
      color: #ffffff;
      transform: scale(1.08);
    }

    /* 响应式样式 */
    @media (max-width: 992px) {
      .hero-h1 { font-size: 2.2rem; }
      .hero-metrics-bar { grid-template-columns: repeat(2, 1fr); }
      .intro-grid { grid-template-columns: repeat(2, 1fr); }
      .services-grid { grid-template-columns: repeat(2, 1fr); }
      .process-steps-wrap { grid-template-columns: repeat(2, 1fr); }
      .reviews-grid { grid-template-columns: repeat(2, 1fr); }
      .media-feature-block { grid-template-columns: 1fr; }
      .contact-form-section { grid-template-columns: 1fr; }
      .footer-top-grid { grid-template-columns: repeat(2, 1fr); }
      .nav-links {
        display: none;
        position: absolute;
        top: 76px;
        left: 0;
        right: 0;
        background: #ffffff;
        flex-direction: column;
        padding: 20px 24px;
        box-shadow: var(--shadow-md);
        border-bottom: 1px solid var(--border-color);
      }
      .nav-links.active {
        display: flex;
      }
      .nav-links li {
        width: 100%;
      }
      .nav-links li a {
        display: block;
        padding: 12px 0;
      }
      .menu-toggle {
        display: block;
      }
      .header-actions {
        display: none;
      }
    }

    @media (max-width: 640px) {
      .hero-h1 { font-size: 1.8rem; }
      .hero-desc { font-size: 1rem; }
      .hero-metrics-bar { grid-template-columns: 1fr; }
      .intro-grid { grid-template-columns: 1fr; }
      .services-grid { grid-template-columns: 1fr; }
      .process-steps-wrap { grid-template-columns: 1fr; }
      .reviews-grid { grid-template-columns: 1fr; }
      .article-links-grid { grid-template-columns: 1fr; }
      .footer-top-grid { grid-template-columns: 1fr; }
      .evaluation-badge-box { flex-direction: column; align-items: flex-start; }
      .eval-score-right { width: 100%; justify-content: space-between; }
    }