:root {
      --primary: #4f46e5;
      --primary-light: #6366f1;
      --rainbow-violet: #8b5cf6;
      --rainbow-blue: #0ea5e9;
      --rainbow-teal: #14b8a6;
      --rainbow-green: #10b981;
      --rainbow-yellow: #f59e0b;
      --rainbow-orange: #f97316;
      --rainbow-pink: #ec4899;
      --text-main: #0f172a;
      --text-body: #334155;
      --text-muted: #64748b;
      --bg-base: #fafbff;
      --card-bg: #ffffff;
      --border-color: #e2e8f0;
      --shadow-sm: 0 2px 8px rgba(15, 23, 42, 0.04);
      --shadow-md: 0 10px 25px -5px rgba(99, 102, 241, 0.08), 0 8px 10px -6px rgba(15, 23, 42, 0.03);
      --shadow-hover: 0 20px 35px -5px rgba(99, 102, 241, 0.14), 0 10px 15px -5px rgba(15, 23, 42, 0.05);
      --radius-sm: 8px;
      --radius-md: 14px;
      --radius-lg: 20px;
      --container-width: 1200px;
    }

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

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

    body {
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      background: linear-gradient(180deg, #f8faff 0%, #fefaff 30%, #f7fcfa 70%, #f8f9ff 100%);
      color: var(--text-body);
      line-height: 1.65;
      overflow-x: hidden;
      min-width: 320px;
    }

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

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

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

    /* 顶部彩虹装饰线条 */
    .rainbow-line {
      height: 4px;
      background: linear-gradient(90deg, #8b5cf6, #3b82f6, #06b6d4, #10b981, #f59e0b, #ef4444, #ec4899);
      width: 100%;
      position: fixed;
      top: 0;
      left: 0;
      z-index: 1000;
    }

    /* 导航栏 */
    .site-header {
      position: sticky;
      top: 4px;
      z-index: 990;
      background: rgba(255, 255, 255, 0.94);
      backdrop-filter: blur(12px);
      -webkit-backdrop-filter: blur(12px);
      border-bottom: 1px solid var(--border-color);
      transition: all 0.3s ease;
    }

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

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

    .ai-page-logo {
      height: 38px;
      width: auto;
      object-fit: contain;
    }

    .brand-text {
      font-size: 1.35rem;
      font-weight: 800;
      color: var(--text-main);
      letter-spacing: -0.5px;
      display: flex;
      align-items: center;
      gap: 6px;
    }

    .brand-badge {
      font-size: 0.72rem;
      padding: 2px 7px;
      border-radius: 99px;
      background: #eff6ff;
      color: #2563eb;
      font-weight: 600;
      border: 1px solid #bfdbfe;
    }

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

    .nav-links li a {
      font-size: 0.94rem;
      font-weight: 600;
      color: var(--text-body);
      padding: 10px 14px;
      border-radius: var(--radius-sm);
      position: relative;
      transition: all 0.25s ease;
      display: inline-block;
    }

    .nav-links li a:hover {
      color: var(--primary);
      background: rgba(99, 102, 241, 0.06);
    }

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

    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 6px;
      padding: 10px 22px;
      font-size: 0.94rem;
      font-weight: 600;
      border-radius: 99px;
      cursor: pointer;
      transition: all 0.25s ease;
      border: none;
      outline: none;
      text-align: center;
    }

    .btn-rainbow {
      background: linear-gradient(135deg, #4f46e5 0%, #7c3aed 50%, #db2777 100%);
      color: #ffffff;
      box-shadow: 0 4px 14px rgba(99, 102, 241, 0.35);
    }

    .btn-rainbow:hover {
      transform: translateY(-2px);
      box-shadow: 0 7px 20px rgba(99, 102, 241, 0.45);
      color: #ffffff;
    }

    .btn-secondary {
      background: #ffffff;
      color: var(--text-main);
      border: 1px solid #cbd5e1;
    }

    .btn-secondary:hover {
      background: #f8fafc;
      border-color: #94a3b8;
      color: var(--primary);
    }

    .mobile-menu-btn {
      display: none;
      background: transparent;
      border: 1px solid var(--border-color);
      width: 40px;
      height: 40px;
      border-radius: var(--radius-sm);
      align-items: center;
      justify-content: center;
      cursor: pointer;
    }

    .mobile-menu-btn span {
      display: block;
      width: 20px;
      height: 2px;
      background: var(--text-main);
      position: relative;
      transition: all 0.3s;
    }

    .mobile-menu-btn span::before,
    .mobile-menu-btn span::after {
      content: "";
      position: absolute;
      width: 20px;
      height: 2px;
      background: var(--text-main);
      left: 0;
      transition: all 0.3s;
    }

    .mobile-menu-btn span::before { top: -6px; }
    .mobile-menu-btn span::after { bottom: -6px; }

    /* 首屏 Hero - 严格不出现任何图片，纯CSS彩虹科技感 */
    .hero-section {
      padding: 70px 0 60px;
      position: relative;
      overflow: hidden;
      text-align: center;
    }

    .hero-glow-1, .hero-glow-2, .hero-glow-3 {
      position: absolute;
      border-radius: 50%;
      filter: blur(80px);
      z-index: -1;
      opacity: 0.6;
      pointer-events: none;
    }

    .hero-glow-1 {
      width: 380px;
      height: 380px;
      background: rgba(147, 51, 234, 0.22);
      top: -60px;
      left: 10%;
    }

    .hero-glow-2 {
      width: 420px;
      height: 420px;
      background: rgba(14, 165, 233, 0.22);
      bottom: -40px;
      right: 12%;
    }

    .hero-glow-3 {
      width: 280px;
      height: 280px;
      background: rgba(245, 158, 11, 0.18);
      top: 30%;
      left: 45%;
    }

    .hero-pill {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 6px 18px;
      background: #ffffff;
      border: 1px solid #e0e7ff;
      border-radius: 99px;
      font-size: 0.85rem;
      font-weight: 600;
      color: #4338ca;
      box-shadow: 0 4px 12px rgba(67, 56, 202, 0.08);
      margin-bottom: 24px;
    }

    .pulse-dot {
      width: 8px;
      height: 8px;
      border-radius: 50%;
      background: #10b981;
      box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.7);
      animation: pulse 2s infinite;
    }

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

    .hero-title {
      font-size: 3rem;
      font-weight: 900;
      color: var(--text-main);
      line-height: 1.25;
      letter-spacing: -1px;
      max-width: 860px;
      margin: 0 auto 20px;
    }

    .hero-title .rainbow-text {
      background: linear-gradient(120deg, #4f46e5 0%, #7c3aed 30%, #ec4899 65%, #f59e0b 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }

    .hero-sub {
      font-size: 1.15rem;
      color: var(--text-muted);
      max-width: 760px;
      margin: 0 auto 34px;
      line-height: 1.7;
    }

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

    .btn-hero-large {
      padding: 14px 34px;
      font-size: 1.05rem;
      font-weight: 700;
    }

    /* 首屏纯CSS数据特性矩阵（替代图片） */
    .hero-feature-board {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 24px 30px;
      box-shadow: var(--shadow-md);
      position: relative;
    }

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

    .hero-stat-card {
      padding: 16px;
      border-radius: var(--radius-md);
      background: #f8faff;
      border: 1px dashed #c7d2fe;
      text-align: center;
      transition: all 0.3s ease;
    }

    .hero-stat-card:hover {
      transform: translateY(-3px);
      background: #ffffff;
      border-style: solid;
      box-shadow: var(--shadow-sm);
    }

    .hero-stat-num {
      font-size: 1.75rem;
      font-weight: 900;
      color: #312e81;
      margin-bottom: 4px;
      display: flex;
      align-items: center;
      justify-content: center;
      gap: 2px;
    }

    .hero-stat-label {
      font-size: 0.86rem;
      color: var(--text-muted);
      font-weight: 500;
    }

    .rainbow-tag-bar {
      display: flex;
      flex-wrap: wrap;
      justify-content: center;
      gap: 8px;
      margin-top: 24px;
      padding-top: 20px;
      border-top: 1px solid #edf2f7;
    }

    .rainbow-tag {
      font-size: 0.78rem;
      padding: 5px 12px;
      border-radius: 99px;
      background: #f1f5f9;
      color: #334155;
      font-weight: 600;
      transition: all 0.25s;
    }

    .rainbow-tag:hover {
      background: #e0e7ff;
      color: #4338ca;
    }

    /* 通用区块排版 */
    .section-wrap {
      padding: 70px 0;
      position: relative;
    }

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

    .section-tag {
      display: inline-block;
      font-size: 0.8rem;
      font-weight: 700;
      text-transform: uppercase;
      letter-spacing: 1px;
      padding: 4px 14px;
      border-radius: 99px;
      background: #ede9fe;
      color: #6d28d9;
      margin-bottom: 12px;
    }

    .section-title {
      font-size: 2.1rem;
      font-weight: 800;
      color: var(--text-main);
      margin-bottom: 14px;
      letter-spacing: -0.5px;
    }

    .section-desc {
      font-size: 1rem;
      color: var(--text-muted);
      line-height: 1.7;
    }

    /* 平台介绍 & 核心能力 */
    .intro-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .intro-card {
      background: var(--card-bg);
      border-radius: var(--radius-md);
      padding: 30px;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
      transition: all 0.3s ease;
      position: relative;
      overflow: hidden;
    }

    .intro-card::before {
      content: "";
      position: absolute;
      top: 0;
      left: 0;
      right: 0;
      height: 4px;
      background: linear-gradient(90deg, #6366f1, #06b6d4);
      opacity: 0;
      transition: opacity 0.3s;
    }

    .intro-card:hover {
      transform: translateY(-5px);
      box-shadow: var(--shadow-hover);
    }

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

    .intro-icon {
      width: 52px;
      height: 52px;
      border-radius: 12px;
      background: linear-gradient(135deg, #eef2ff 0%, #e0e7ff 100%);
      color: #4f46e5;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.5rem;
      margin-bottom: 20px;
    }

    .intro-card h3 {
      font-size: 1.25rem;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 12px;
    }

    .intro-card p {
      font-size: 0.92rem;
      color: var(--text-muted);
      line-height: 1.65;
    }

    /* AIGC应用场景矩阵 */
    .services-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 22px;
    }

    .service-card {
      background: #ffffff;
      border-radius: var(--radius-md);
      padding: 24px;
      border: 1px solid #eef2f6;
      box-shadow: var(--shadow-sm);
      transition: all 0.3s ease;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .service-card:hover {
      transform: translateY(-4px);
      border-color: #c7d2fe;
      box-shadow: var(--shadow-hover);
    }

    .service-badge {
      display: inline-block;
      align-self: flex-start;
      padding: 3px 10px;
      border-radius: 6px;
      font-size: 0.75rem;
      font-weight: 700;
      margin-bottom: 12px;
    }

    .badge-purple { background: #f3e8ff; color: #7e22ce; }
    .badge-blue { background: #e0f2fe; color: #0369a1; }
    .badge-amber { background: #fef3c7; color: #b45309; }
    .badge-emerald { background: #d1fae5; color: #047857; }
    .badge-rose { background: #ffe4e6; color: #be123c; }

    .service-card h3 {
      font-size: 1.15rem;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 10px;
    }

    .service-card p {
      font-size: 0.88rem;
      color: var(--text-muted);
      line-height: 1.6;
      margin-bottom: 16px;
      flex-grow: 1;
    }

    .service-features {
      list-style: none;
      font-size: 0.82rem;
      color: var(--text-body);
      border-top: 1px dashed #e2e8f0;
      padding-top: 12px;
    }

    .service-features li {
      display: flex;
      align-items: center;
      gap: 6px;
      margin-bottom: 5px;
    }

    .service-features li::before {
      content: "✓";
      color: #10b981;
      font-weight: 900;
    }

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

    .compare-header {
      background: linear-gradient(135deg, #1e1b4b 0%, #312e81 100%);
      color: #ffffff;
      padding: 36px 30px;
      display: flex;
      flex-wrap: wrap;
      align-items: center;
      justify-content: space-between;
      gap: 20px;
    }

    .compare-score-box {
      display: flex;
      align-items: center;
      gap: 24px;
    }

    .big-score {
      font-size: 3.4rem;
      font-weight: 900;
      color: #fbbf24;
      line-height: 1;
    }

    .score-details h4 {
      font-size: 1.25rem;
      font-weight: 700;
      margin-bottom: 4px;
    }

    .star-rating {
      color: #fbbf24;
      font-size: 1.2rem;
      letter-spacing: 2px;
    }

    .score-details p {
      font-size: 0.88rem;
      color: #cbd5e1;
    }

    .table-responsive {
      overflow-x: auto;
      padding: 0;
    }

    .compare-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
      font-size: 0.92rem;
    }

    .compare-table th, .compare-table td {
      padding: 16px 20px;
      border-bottom: 1px solid #f1f5f9;
    }

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

    .col-highlight {
      background: #f5f3ff;
      color: #4338ca;
      font-weight: 700;
    }

    .tag-better {
      display: inline-block;
      padding: 3px 8px;
      border-radius: 4px;
      font-size: 0.78rem;
      background: #dcfce7;
      color: #15803d;
      font-weight: 600;
    }

    /* 行业案例展示 */
    .case-grid {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 26px;
    }

    .case-card {
      background: #ffffff;
      border-radius: var(--radius-md);
      overflow: hidden;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
      transition: all 0.3s ease;
    }

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

    .case-img-box {
      width: 100%;
      position: relative;
      background: #f1f5f9;
      aspect-ratio: 16/9;
      overflow: hidden;
    }

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

    .case-card:hover .case-img-box img {
      transform: scale(1.03);
    }

    .case-content {
      padding: 24px;
    }

    .case-content h3 {
      font-size: 1.25rem;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 10px;
    }

    .case-content p {
      font-size: 0.9rem;
      color: var(--text-muted);
      line-height: 1.6;
      margin-bottom: 16px;
    }

    .case-meta {
      display: flex;
      align-items: center;
      justify-content: space-between;
      font-size: 0.82rem;
      color: var(--text-muted);
      border-top: 1px solid #f1f5f9;
      padding-top: 12px;
    }

    .banner-strip {
      margin-top: 36px;
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 20px;
    }

    .banner-item {
      border-radius: var(--radius-md);
      overflow: hidden;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
      aspect-ratio: 21/9;
    }

    .banner-item img {
      width: 100%;
      height: 100%;
      object-fit: cover;
    }

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

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

    .step-badge {
      width: 44px;
      height: 44px;
      border-radius: 50%;
      background: linear-gradient(135deg, #4f46e5, #06b6d4);
      color: #ffffff;
      font-weight: 800;
      font-size: 1.1rem;
      display: flex;
      align-items: center;
      justify-content: center;
      margin: 0 auto 16px;
      box-shadow: 0 4px 10px rgba(79, 70, 229, 0.3);
    }

    .step-card h3 {
      font-size: 1.1rem;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 8px;
    }

    .step-card p {
      font-size: 0.85rem;
      color: var(--text-muted);
      line-height: 1.6;
    }

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

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

    .review-stars {
      color: #f59e0b;
      font-size: 0.95rem;
      margin-bottom: 12px;
    }

    .review-text {
      font-size: 0.9rem;
      color: var(--text-body);
      line-height: 1.65;
      margin-bottom: 18px;
      font-style: italic;
    }

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

    .reviewer-avatar {
      width: 40px;
      height: 40px;
      border-radius: 50%;
      background: linear-gradient(135deg, #e0e7ff, #ede9fe);
      color: #4f46e5;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      font-size: 0.95rem;
    }

    .reviewer-name {
      font-weight: 700;
      font-size: 0.92rem;
      color: var(--text-main);
    }

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

    /* 常见问题 FAQ 折叠面板 */
    .faq-list {
      max-width: 860px;
      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;
      transition: all 0.25s ease;
    }

    .faq-item.active {
      border-color: #818cf8;
      box-shadow: 0 4px 15px rgba(99, 102, 241, 0.08);
    }

    .faq-question {
      padding: 18px 24px;
      font-weight: 700;
      font-size: 1rem;
      color: var(--text-main);
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      user-select: none;
    }

    .faq-toggle-icon {
      font-size: 1.25rem;
      color: #6366f1;
      transition: transform 0.3s ease;
    }

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

    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.35s ease, padding 0.35s ease;
      padding: 0 24px;
      background: #fafbff;
      font-size: 0.92rem;
      color: var(--text-body);
      line-height: 1.7;
    }

    .faq-item.active .faq-answer {
      padding: 16px 24px 22px;
      max-height: 240px;
    }

    /* 需求匹配与联系我们表单区 */
    .contact-wrapper {
      display: grid;
      grid-template-columns: 1fr 1.1fr;
      gap: 36px;
      background: #ffffff;
      border-radius: var(--radius-lg);
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-md);
      overflow: hidden;
    }

    .contact-info-side {
      background: linear-gradient(135deg, #1e1b4b 0%, #2e1065 100%);
      color: #ffffff;
      padding: 40px;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .contact-info-side h3 {
      font-size: 1.6rem;
      font-weight: 800;
      margin-bottom: 12px;
    }

    .contact-info-side p {
      font-size: 0.94rem;
      color: #cbd5e1;
      margin-bottom: 26px;
    }

    .contact-channels {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 14px;
      margin-bottom: 30px;
    }

    .contact-channels li {
      display: flex;
      align-items: center;
      gap: 12px;
      font-size: 0.94rem;
      color: #e2e8f0;
    }

    .channel-icon {
      width: 34px;
      height: 34px;
      border-radius: 8px;
      background: rgba(255, 255, 255, 0.12);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 0.9rem;
      font-weight: 700;
    }

    .qr-showcase {
      display: flex;
      align-items: center;
      gap: 16px;
      background: rgba(255, 255, 255, 0.08);
      padding: 16px;
      border-radius: var(--radius-md);
      border: 1px solid rgba(255, 255, 255, 0.15);
    }

    .qr-container {
      width: 88px;
      height: 88px;
      border-radius: 6px;
      background: #ffffff;
      padding: 4px;
      flex-shrink: 0;
    }

    .qr-container img {
      width: 100%;
      height: 100%;
      object-fit: cover;
    }

    .qr-text h5 {
      font-size: 0.95rem;
      font-weight: 700;
      margin-bottom: 4px;
    }

    .qr-text p {
      font-size: 0.8rem;
      color: #94a3b8;
      margin-bottom: 0;
    }

    .form-side {
      padding: 40px;
    }

    .form-side h3 {
      font-size: 1.4rem;
      font-weight: 800;
      color: var(--text-main);
      margin-bottom: 8px;
    }

    .form-side p {
      font-size: 0.88rem;
      color: var(--text-muted);
      margin-bottom: 24px;
    }

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

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

    .form-group label {
      font-size: 0.86rem;
      font-weight: 600;
      color: var(--text-main);
    }

    .form-control {
      width: 100%;
      padding: 11px 14px;
      border: 1px solid #cbd5e1;
      border-radius: var(--radius-sm);
      font-size: 0.92rem;
      color: var(--text-body);
      background: #ffffff;
      outline: none;
      transition: all 0.25s;
    }

    .form-control:focus {
      border-color: #6366f1;
      box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.15);
    }

    .form-row {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 16px;
    }

    /* 资讯与AI百科推荐条 */
    .article-section-box {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 24px 30px;
      margin-top: 36px;
      box-shadow: var(--shadow-sm);
    }

    .article-head {
      font-size: 1.05rem;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 14px;
      display: flex;
      align-items: center;
      gap: 8px;
    }

    .article-links-wrap {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
    }

    .article-chip {
      font-size: 0.82rem;
      padding: 6px 14px;
      border-radius: 99px;
      background: #f1f5f9;
      color: #334155;
      border: 1px solid #e2e8f0;
      transition: all 0.2s;
    }

    .article-chip:hover {
      background: #e0e7ff;
      color: #4338ca;
      border-color: #c7d2fe;
    }

    /* 页脚 */
    .site-footer {
      background: #ffffff;
      border-top: 1px solid var(--border-color);
      padding: 50px 0 30px;
      color: var(--text-body);
      margin-top: 60px;
    }

    .footer-grid {
      display: grid;
      grid-template-columns: 1.8fr 1fr 1.2fr;
      gap: 36px;
      padding-bottom: 36px;
      border-bottom: 1px solid #f1f5f9;
    }

    .footer-brand h4 {
      font-size: 1.2rem;
      font-weight: 800;
      color: var(--text-main);
      margin-bottom: 12px;
    }

    .footer-brand p {
      font-size: 0.88rem;
      color: var(--text-muted);
      line-height: 1.65;
      max-width: 380px;
    }

    .footer-col h5 {
      font-size: 0.95rem;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 14px;
    }

    .friend-links-box {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
    }

    .friend-links-box a {
      font-size: 0.84rem;
      color: #475569;
      background: #f8fafc;
      padding: 4px 10px;
      border-radius: 4px;
      border: 1px solid #e2e8f0;
    }

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

    .footer-bottom {
      padding-top: 24px;
      display: flex;
      flex-wrap: wrap;
      align-items: center;
      justify-content: space-between;
      font-size: 0.84rem;
      color: var(--text-muted);
      gap: 14px;
    }

    .footer-bottom a {
      color: var(--text-muted);
    }

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

    /* 浮动服务挂件 */
    .float-widget {
      position: fixed;
      right: 20px;
      bottom: 40px;
      z-index: 998;
      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: 0 4px 14px rgba(0, 0, 0, 0.1);
      display: flex;
      align-items: center;
      justify-content: center;
      color: var(--primary);
      cursor: pointer;
      transition: all 0.25s;
      font-size: 1.15rem;
    }

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

    /* 响应式调整 */
    @media (max-width: 1024px) {
      .hero-board-grid { grid-template-columns: repeat(2, 1fr); }
      .intro-grid { grid-template-columns: repeat(2, 1fr); }
      .services-grid { grid-template-columns: repeat(2, 1fr); }
      .steps-grid { grid-template-columns: repeat(2, 1fr); }
      .reviews-grid { grid-template-columns: repeat(2, 1fr); }
      .footer-grid { grid-template-columns: 1fr; gap: 24px; }
      .contact-wrapper { grid-template-columns: 1fr; }
    }

    @media (max-width: 768px) {
      .hero-title { font-size: 2.1rem; }
      .section-title { font-size: 1.65rem; }
      .mobile-menu-btn { display: flex; }
      
      .nav-links {
        position: absolute;
        top: 72px;
        left: 0;
        right: 0;
        background: #ffffff;
        flex-direction: column;
        align-items: flex-start;
        padding: 20px;
        box-shadow: 0 10px 20px rgba(0, 0, 0, 0.08);
        border-bottom: 1px solid var(--border-color);
        display: none;
      }
      
      .nav-links.show {
        display: flex;
      }

      .nav-links li {
        width: 100%;
      }

      .nav-links li a {
        display: block;
        padding: 10px 0;
        width: 100%;
        border-bottom: 1px solid #f1f5f9;
      }

      .header-actions .btn {
        display: none;
      }

      .hero-board-grid,
      .intro-grid,
      .services-grid,
      .steps-grid,
      .reviews-grid,
      .case-grid,
      .form-row,
      .banner-strip {
        grid-template-columns: 1fr;
      }

      .compare-score-box {
        flex-direction: column;
        align-items: flex-start;
        gap: 10px;
      }

      .contact-info-side, .form-side {
        padding: 24px 20px;
      }
    }