:root {
      --bg-base: #f8fafc;
      --bg-surface: #ffffff;
      --bg-alt: #f1f5f9;
      --text-main: #0f172a;
      --text-muted: #475569;
      --text-light: #64748b;
      --neon-cyan: #00e5ff;
      --neon-green: #00f076;
      --neon-purple: #7928ca;
      --neon-pink: #ff0080;
      --primary: #0284c7;
      --primary-dark: #0369a1;
      --gradient-neon: linear-gradient(135deg, #00f076 0%, #00e5ff 50%, #7928ca 100%);
      --gradient-glow: linear-gradient(135deg, rgba(0, 229, 255, 0.12), rgba(121, 40, 202, 0.12));
      --border-color: #e2e8f0;
      --border-glow: rgba(0, 229, 255, 0.4);
      --shadow-sm: 0 2px 8px rgba(15, 23, 42, 0.04);
      --shadow-md: 0 10px 25px -5px rgba(15, 23, 42, 0.08), 0 8px 10px -6px rgba(15, 23, 42, 0.04);
      --shadow-neon: 0 12px 30px rgba(0, 229, 255, 0.18);
      --radius-sm: 8px;
      --radius-md: 14px;
      --radius-lg: 20px;
      --transition: all 0.28s cubic-bezier(0.4, 0, 0.2, 1);
    }

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

    html {
      scroll-behavior: smooth;
      font-size: 16px;
    }

    body {
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      background-color: var(--bg-base);
      color: var(--text-main);
      line-height: 1.65;
      overflow-x: hidden;
      position: relative;
    }

    body::before {
      content: "";
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      height: 100%;
      pointer-events: none;
      z-index: -1;
      background: radial-gradient(circle at 10% 20%, rgba(0, 229, 255, 0.05) 0%, transparent 40%),
                  radial-gradient(circle at 90% 80%, rgba(255, 0, 128, 0.04) 0%, transparent 40%),
                  radial-gradient(circle at 50% 50%, rgba(0, 240, 118, 0.03) 0%, transparent 60%);
    }

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

    img {
      display: block;
      max-width: 100%;
      height: auto;
    }

    .container {
      width: 100%;
      max-width: 1200px;
      margin-left: auto;
      margin-right: auto;
      padding-left: 20px;
      padding-right: 20px;
    }

    /* 顶部导航 */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 100;
      background: rgba(255, 255, 255, 0.92);
      backdrop-filter: blur(14px);
      -webkit-backdrop-filter: blur(14px);
      border-bottom: 1px solid rgba(226, 232, 240, 0.8);
      box-shadow: 0 4px 20px rgba(0, 229, 255, 0.06);
    }

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

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

    .brand-area .logo-wrapper {
      max-width: 140px;
      display: flex;
      align-items: center;
    }

    .brand-title {
      font-size: 1.15rem;
      font-weight: 700;
      color: var(--text-main);
      display: flex;
      align-items: center;
      gap: 6px;
    }

    .neon-dot {
      width: 8px;
      height: 8px;
      background: var(--neon-cyan);
      border-radius: 50%;
      box-shadow: 0 0 10px var(--neon-cyan);
      display: inline-block;
    }

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

    .nav-links li a {
      display: block;
      padding: 10px 14px;
      font-size: 0.95rem;
      font-weight: 600;
      color: var(--text-muted);
      border-radius: var(--radius-sm);
      position: relative;
    }

    .nav-links li a:hover,
    .nav-links li a.active {
      color: var(--primary-dark);
      background: rgba(0, 229, 255, 0.08);
    }

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

    .btn-glow {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      background: var(--gradient-neon);
      color: #05192d;
      font-weight: 700;
      padding: 10px 22px;
      border-radius: 999px;
      box-shadow: 0 4px 15px rgba(0, 229, 255, 0.35);
      border: none;
      cursor: pointer;
      transition: var(--transition);
      white-space: nowrap;
    }

    .btn-glow:hover {
      transform: translateY(-2px);
      box-shadow: 0 8px 25px rgba(0, 229, 255, 0.55);
    }

    .btn-secondary {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      background: #ffffff;
      color: var(--text-main);
      font-weight: 600;
      padding: 9px 20px;
      border-radius: 999px;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
      white-space: nowrap;
    }

    .btn-secondary:hover {
      border-color: var(--neon-cyan);
      color: var(--primary);
      transform: translateY(-2px);
    }

    .menu-toggle {
      display: none;
      background: none;
      border: 1px solid var(--border-color);
      padding: 8px 12px;
      border-radius: 6px;
      cursor: pointer;
      font-size: 1.1rem;
      color: var(--text-main);
    }

    /* 首屏 Hero 区域（严格纯代码与渐变，无图片） */
    .hero-section {
      padding: 70px 0 80px;
      position: relative;
      background: linear-gradient(180deg, rgba(240, 253, 250, 0.8) 0%, rgba(248, 250, 252, 1) 100%);
      border-bottom: 1px solid var(--border-color);
      overflow: hidden;
    }

    .hero-glow-blob {
      position: absolute;
      width: 480px;
      height: 480px;
      border-radius: 50%;
      filter: blur(80px);
      opacity: 0.28;
      pointer-events: none;
      z-index: 0;
    }

    .blob-1 {
      top: -100px;
      right: -100px;
      background: var(--neon-cyan);
    }

    .blob-2 {
      bottom: -150px;
      left: -100px;
      background: var(--neon-pink);
    }

    .hero-content {
      position: relative;
      z-index: 2;
      text-align: center;
      max-width: 920px;
      margin: 0 auto;
    }

    .hero-badge {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 6px 18px;
      background: rgba(255, 255, 255, 0.9);
      border: 1px solid rgba(0, 229, 255, 0.4);
      border-radius: 999px;
      font-size: 0.88rem;
      font-weight: 700;
      color: var(--primary-dark);
      box-shadow: 0 4px 15px rgba(0, 229, 255, 0.15);
      margin-bottom: 24px;
    }

    .hero-badge .tag {
      background: var(--gradient-neon);
      color: #032130;
      font-size: 0.75rem;
      padding: 2px 8px;
      border-radius: 999px;
    }

    .hero-title {
      font-size: clamp(2rem, 4.5vw, 3.2rem);
      font-weight: 800;
      line-height: 1.25;
      color: var(--text-main);
      margin-bottom: 20px;
      letter-spacing: -0.02em;
    }

    .hero-title .highlight-text {
      background: var(--gradient-neon);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      display: inline-block;
      text-shadow: 0 4px 20px rgba(0, 229, 255, 0.2);
    }

    .hero-desc {
      font-size: 1.15rem;
      color: var(--text-muted);
      line-height: 1.7;
      margin-bottom: 34px;
      max-width: 800px;
      margin-left: auto;
      margin-right: auto;
    }

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

    .btn-hero-primary {
      font-size: 1.05rem;
      padding: 14px 38px;
      background: var(--gradient-neon);
      color: #021a2c;
      font-weight: 800;
      border-radius: 999px;
      box-shadow: 0 8px 30px rgba(0, 229, 255, 0.45);
      border: none;
      cursor: pointer;
      transition: var(--transition);
      display: inline-flex;
      align-items: center;
      gap: 10px;
    }

    .btn-hero-primary:hover {
      transform: translateY(-3px) scale(1.02);
      box-shadow: 0 12px 40px rgba(0, 229, 255, 0.65);
    }

    /* 首屏纯CSS指标卡片（无图） */
    .hero-stats-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 18px;
      margin-top: 20px;
    }

    .stat-card-css {
      background: rgba(255, 255, 255, 0.85);
      backdrop-filter: blur(10px);
      border: 1px solid rgba(226, 232, 240, 0.9);
      border-top: 3px solid var(--neon-cyan);
      padding: 22px 16px;
      border-radius: var(--radius-md);
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
      text-align: center;
    }

    .stat-card-css:hover {
      transform: translateY(-4px);
      box-shadow: 0 10px 25px rgba(0, 229, 255, 0.15);
      border-color: var(--neon-cyan);
    }

    .stat-num {
      font-size: 2rem;
      font-weight: 800;
      color: var(--text-main);
      display: block;
      margin-bottom: 4px;
      background: linear-gradient(135deg, #0284c7 0%, #7928ca 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }

    .stat-label {
      font-size: 0.88rem;
      color: var(--text-muted);
      font-weight: 600;
    }

    /* 章节通用样式 */
    .section-wrap {
      padding: 70px 0;
      position: relative;
    }

    .section-wrap.alt-bg {
      background-color: var(--bg-surface);
      border-top: 1px solid var(--border-color);
      border-bottom: 1px solid var(--border-color);
    }

    .section-header {
      text-align: center;
      max-width: 780px;
      margin: 0 auto 50px;
    }

    .section-tag {
      display: inline-block;
      font-size: 0.82rem;
      font-weight: 700;
      text-transform: uppercase;
      letter-spacing: 0.08em;
      color: var(--primary);
      background: rgba(2, 132, 199, 0.08);
      border: 1px solid rgba(2, 132, 199, 0.2);
      padding: 4px 14px;
      border-radius: 999px;
      margin-bottom: 12px;
    }

    .section-title {
      font-size: clamp(1.6rem, 3vw, 2.2rem);
      font-weight: 800;
      color: var(--text-main);
      margin-bottom: 14px;
      letter-spacing: -0.01em;
    }

    .section-subtitle {
      font-size: 1rem;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* 模块：关于我们与平台介绍 */
    .intro-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 36px;
      align-items: center;
    }

    .intro-content h3 {
      font-size: 1.6rem;
      font-weight: 700;
      margin-bottom: 16px;
      color: var(--text-main);
    }

    .intro-content p {
      color: var(--text-muted);
      margin-bottom: 18px;
      font-size: 1rem;
      line-height: 1.7;
    }

    .features-pill-list {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      margin-top: 24px;
    }

    .pill-item {
      padding: 8px 16px;
      background: #f1f5f9;
      border: 1px solid #cbd5e1;
      border-radius: 999px;
      font-size: 0.88rem;
      font-weight: 600;
      color: var(--text-main);
    }

    .intro-media-card {
      background: #ffffff;
      padding: 16px;
      border-radius: var(--radius-lg);
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-md);
      position: relative;
      overflow: hidden;
    }

    .intro-media-card::before {
      content: "";
      position: absolute;
      top: 0;
      left: 0;
      right: 0;
      height: 4px;
      background: var(--gradient-neon);
    }

    /* 模块：AIGC模型矩阵标签云 */
    .model-tags-container {
      display: flex;
      flex-wrap: wrap;
      justify-content: center;
      gap: 10px;
      padding: 24px;
      background: #ffffff;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
    }

    .model-tag {
      background: #f8fafc;
      border: 1px solid var(--border-color);
      color: var(--text-main);
      padding: 8px 16px;
      border-radius: 8px;
      font-size: 0.9rem;
      font-weight: 600;
      transition: var(--transition);
    }

    .model-tag:hover {
      background: rgba(0, 229, 255, 0.12);
      border-color: var(--neon-cyan);
      color: var(--primary-dark);
      transform: translateY(-2px);
    }

    /* 模块：服务能力网格 */
    .services-grid {
      display: grid;
      grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
      gap: 24px;
    }

    .service-card {
      background: var(--bg-surface);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 26px;
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
      position: relative;
    }

    .service-card:hover {
      transform: translateY(-6px);
      box-shadow: 0 16px 30px rgba(0, 229, 255, 0.12);
      border-color: var(--border-glow);
    }

    .service-card-head {
      margin-bottom: 14px;
    }

    .service-icon-box {
      width: 44px;
      height: 44px;
      border-radius: 10px;
      background: var(--gradient-glow);
      border: 1px solid rgba(0, 229, 255, 0.3);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.3rem;
      margin-bottom: 14px;
      color: var(--primary);
    }

    .service-title {
      font-size: 1.18rem;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 8px;
    }

    .service-desc {
      font-size: 0.92rem;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* 对比评测高亮板块 */
    .eval-highlight-box {
      background: linear-gradient(135deg, rgba(2, 132, 199, 0.05), rgba(121, 40, 202, 0.05));
      border: 2px solid rgba(0, 229, 255, 0.4);
      border-radius: var(--radius-lg);
      padding: 36px 30px;
      margin-bottom: 32px;
      display: flex;
      flex-wrap: wrap;
      align-items: center;
      justify-content: space-between;
      gap: 24px;
      box-shadow: var(--shadow-neon);
    }

    .eval-score-wrap {
      display: flex;
      align-items: center;
      gap: 20px;
    }

    .eval-score-num {
      font-size: 3.5rem;
      font-weight: 900;
      color: #0284c7;
      line-height: 1;
      letter-spacing: -0.03em;
    }

    .eval-score-meta h4 {
      font-size: 1.25rem;
      font-weight: 800;
      color: var(--text-main);
      margin-bottom: 4px;
    }

    .eval-stars {
      color: #f59e0b;
      font-size: 1.2rem;
    }

    .eval-highlights-list {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
      max-width: 600px;
    }

    .eval-chip {
      background: #ffffff;
      border: 1px solid rgba(0, 229, 255, 0.3);
      padding: 6px 14px;
      border-radius: 999px;
      font-size: 0.85rem;
      font-weight: 600;
      color: var(--text-main);
    }

    .comparison-table-wrapper {
      width: 100%;
      overflow-x: auto;
      background: var(--bg-surface);
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
    }

    .compare-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
      min-width: 720px;
    }

    .compare-table th,
    .compare-table td {
      padding: 16px 20px;
      border-bottom: 1px solid var(--border-color);
      font-size: 0.94rem;
    }

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

    .compare-table th.highlight-col,
    .compare-table td.highlight-col {
      background: rgba(0, 229, 255, 0.05);
      font-weight: 700;
      color: var(--primary-dark);
      border-left: 1px solid rgba(0, 229, 255, 0.2);
      border-right: 1px solid rgba(0, 229, 255, 0.2);
    }

    /* 流程步骤 */
    .process-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
    }

    .process-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 26px 20px;
      position: relative;
      transition: var(--transition);
    }

    .process-card:hover {
      border-color: var(--neon-cyan);
      transform: translateY(-4px);
    }

    .step-badge {
      display: inline-block;
      font-size: 0.8rem;
      font-weight: 800;
      background: var(--gradient-neon);
      color: #011627;
      padding: 3px 10px;
      border-radius: 999px;
      margin-bottom: 12px;
    }

    .step-title {
      font-size: 1.1rem;
      font-weight: 700;
      margin-bottom: 8px;
    }

    .step-desc {
      font-size: 0.88rem;
      color: var(--text-muted);
    }

    /* 案例展示图片区 */
    .case-grid {
      display: grid;
      grid-template-columns: 2fr 1fr;
      gap: 24px;
      align-items: stretch;
    }

    .case-item-media {
      background: #ffffff;
      border-radius: var(--radius-md);
      overflow: hidden;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
    }

    .case-item-media img {
      width: 100%;
      height: 260px;
      object-fit: cover;
    }

    .case-meta {
      padding: 18px 20px;
    }

    .case-meta h4 {
      font-size: 1.1rem;
      font-weight: 700;
      margin-bottom: 6px;
    }

    .case-meta p {
      font-size: 0.88rem;
      color: var(--text-muted);
    }

    /* 评论板块 */
    .reviews-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 22px;
    }

    .review-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;
      transition: var(--transition);
    }

    .review-card:hover {
      border-color: var(--neon-cyan);
      box-shadow: 0 10px 25px rgba(0, 229, 255, 0.1);
      transform: translateY(-4px);
    }

    .review-stars {
      color: #f59e0b;
      margin-bottom: 12px;
    }

    .review-text {
      font-size: 0.92rem;
      color: var(--text-main);
      line-height: 1.65;
      margin-bottom: 16px;
    }

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

    .author-avatar {
      width: 38px;
      height: 38px;
      border-radius: 50%;
      background: var(--gradient-glow);
      border: 1px solid var(--neon-cyan);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      color: var(--primary);
    }

    .author-name {
      font-weight: 700;
      font-size: 0.9rem;
    }

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

    /* 折叠 FAQ 板块 */
    .faq-container {
      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: var(--transition);
    }

    .faq-item:hover {
      border-color: var(--neon-cyan);
    }

    .faq-question {
      width: 100%;
      padding: 18px 22px;
      text-align: left;
      background: none;
      border: none;
      display: flex;
      justify-content: space-between;
      align-items: center;
      font-size: 1.02rem;
      font-weight: 700;
      color: var(--text-main);
      cursor: pointer;
    }

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

    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s ease-out, padding 0.3s ease;
      background: #f8fafc;
      padding: 0 22px;
      color: var(--text-muted);
      font-size: 0.94rem;
      line-height: 1.7;
    }

    .faq-item.active .faq-answer {
      max-height: 200px;
      padding: 16px 22px 20px;
      border-top: 1px solid var(--border-color);
    }

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

    /* 需求表单与联系我们板块 */
    .contact-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 36px;
    }

    .contact-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 32px;
      box-shadow: var(--shadow-md);
    }

    .contact-card h3 {
      font-size: 1.4rem;
      font-weight: 700;
      margin-bottom: 12px;
    }

    .contact-card p {
      font-size: 0.94rem;
      color: var(--text-muted);
      margin-bottom: 24px;
    }

    .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 14px;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-sm);
      font-size: 0.92rem;
      color: var(--text-main);
      background: #f8fafc;
      outline: none;
      transition: var(--transition);
      font-family: inherit;
    }

    .form-control:focus {
      border-color: var(--neon-cyan);
      background: #ffffff;
      box-shadow: 0 0 0 3px rgba(0, 229, 255, 0.15);
    }

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

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

    .info-row {
      display: flex;
      align-items: center;
      gap: 12px;
      font-size: 0.95rem;
      color: var(--text-main);
    }

    .info-label {
      font-weight: 700;
      min-width: 80px;
      color: var(--text-muted);
    }

    .qr-container {
      display: flex;
      gap: 20px;
      align-items: center;
      background: #f8fafc;
      padding: 16px;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
    }

    .qr-box {
      width: 110px;
      height: 110px;
      background: #ffffff;
      padding: 6px;
      border: 1px solid var(--border-color);
      border-radius: 8px;
    }

    .qr-box img {
      width: 100%;
      height: 100%;
      object-fit: contain;
    }

    /* 资讯与友情链接 */
    .article-links-wrap {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      margin-top: 14px;
    }

    .article-pill {
      background: #ffffff;
      border: 1px solid var(--border-color);
      padding: 6px 14px;
      border-radius: 6px;
      font-size: 0.85rem;
      color: var(--text-muted);
      transition: var(--transition);
    }

    .article-pill:hover {
      border-color: var(--neon-cyan);
      color: var(--primary);
    }

    .footer-links-box {
      margin-top: 24px;
      padding-top: 20px;
      border-top: 1px solid #e2e8f0;
    }

    .footer-links-box .flink-group {
      display: flex;
      flex-wrap: wrap;
      gap: 14px;
      margin-top: 8px;
    }

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

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

    /* 页脚 */
    .site-footer {
      background: #ffffff;
      border-top: 1px solid var(--border-color);
      padding: 30px 0;
      text-align: center;
    }

    .footer-inner {
      display: flex;
      flex-direction: column;
      align-items: center;
      gap: 12px;
      font-size: 0.88rem;
      color: var(--text-light);
    }

    /* 悬浮客服挂件与返回顶部 */
    .floating-widget {
      position: fixed;
      right: 20px;
      bottom: 24px;
      display: flex;
      flex-direction: column;
      gap: 10px;
      z-index: 99;
    }

    .float-btn {
      width: 46px;
      height: 46px;
      background: #ffffff;
      border: 1px solid rgba(0, 229, 255, 0.4);
      border-radius: 50%;
      box-shadow: 0 4px 15px rgba(0, 229, 255, 0.25);
      display: flex;
      align-items: center;
      justify-content: center;
      cursor: pointer;
      font-weight: 700;
      color: var(--primary-dark);
      transition: var(--transition);
      font-size: 0.95rem;
    }

    .float-btn:hover {
      background: var(--gradient-neon);
      transform: translateY(-3px);
      box-shadow: 0 8px 25px rgba(0, 229, 255, 0.45);
    }

    /* 响应式适配 */
    @media (max-width: 992px) {
      .hero-stats-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .intro-grid,
      .contact-grid,
      .case-grid {
        grid-template-columns: 1fr;
      }
      .process-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .reviews-grid {
        grid-template-columns: 1fr;
      }
      .nav-links {
        display: none;
        position: absolute;
        top: 72px;
        left: 0;
        width: 100%;
        background: #ffffff;
        flex-direction: column;
        align-items: flex-start;
        padding: 16px 20px;
        border-bottom: 1px solid var(--border-color);
        box-shadow: 0 10px 20px rgba(0,0,0,0.05);
      }
      .nav-links.active {
        display: flex;
      }
      .nav-links li {
        width: 100%;
      }
      .nav-links li a {
        width: 100%;
        padding: 12px 0;
        border-bottom: 1px solid #f1f5f9;
      }
      .menu-toggle {
        display: block;
      }
    }

    @media (max-width: 576px) {
      .hero-stats-grid,
      .process-grid {
        grid-template-columns: 1fr;
      }
      .header-actions .btn-glow {
        display: none;
      }
      .eval-highlight-box {
        padding: 24px 18px;
      }
      .eval-score-wrap {
        flex-direction: column;
        align-items: flex-start;
        gap: 6px;
      }
    }