:root {
      --bg-page: #f9fbfd;
      --bg-surface: #ffffff;
      --text-main: #141b2d;
      --text-muted: #55627a;
      --text-sub: #7d8b9f;
      --primary: #5842ff;
      --primary-dark: #3a25d9;
      --accent: #00d2ff;
      --accent-pink: #fa52a0;
      --border-light: rgba(180, 195, 220, 0.45);
      --border-glow: rgba(160, 130, 255, 0.4);
      --card-shadow: 0 12px 36px rgba(120, 140, 200, 0.08);
      --card-shadow-hover: 0 18px 42px rgba(90, 80, 240, 0.16);
      --laser-gradient: linear-gradient(135deg, #fa709a 0%, #fee140 30%, #30cfd0 70%, #667eea 100%);
      --soft-laser: linear-gradient(135deg, rgba(250,112,154,0.12) 0%, rgba(254,225,64,0.08) 25%, rgba(48,207,208,0.12) 65%, rgba(102,126,234,0.15) 100%);
      --container-max: 1200px;
    }

    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
      -webkit-font-smoothing: antialiased;
    }

    body {
      background-color: var(--bg-page);
      background-image: 
        radial-gradient(at 80% 0%, rgba(240, 140, 220, 0.12) 0px, transparent 50%),
        radial-gradient(at 0% 50%, rgba(80, 200, 255, 0.1) 0px, transparent 50%),
        radial-gradient(at 90% 90%, rgba(120, 100, 255, 0.08) 0px, transparent 50%);
      background-attachment: fixed;
      color: var(--text-main);
      font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      line-height: 1.6;
    }

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

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

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

    /* 顶部导航 */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(255, 255, 255, 0.9);
      backdrop-filter: blur(14px);
      border-bottom: 1px solid var(--border-light);
    }
    .header-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 72px;
    }
    .brand-wrap {
      display: flex;
      align-items: center;
      gap: 12px;
    }
    .brand-wrap img.ai-page-logo {
      height: 40px;
      width: auto;
      object-fit: contain;
    }
    .brand-meta {
      display: flex;
      flex-direction: column;
    }
    .brand-name {
      font-size: 19px;
      font-weight: 700;
      letter-spacing: 0.5px;
      color: #1a1e36;
    }
    .brand-tag {
      font-size: 11px;
      color: var(--text-sub);
      text-transform: uppercase;
      letter-spacing: 1px;
    }

    .nav-links {
      display: flex;
      align-items: center;
      gap: 0;
      list-style: none;
    }
    .nav-links li a {
      font-size: 14px;
      font-weight: 500;
      color: var(--text-muted);
      padding: 8px 12px;
      border-radius: 6px;
      white-space: nowrap;
    }
    .nav-links li a:hover {
      color: var(--primary);
      background: rgba(88, 66, 255, 0.06);
    }

    .header-action {
      display: flex;
      align-items: center;
      gap: 12px;
    }
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      font-size: 14px;
      font-weight: 600;
      padding: 9px 20px;
      border-radius: 8px;
      cursor: pointer;
      transition: all 0.25s ease;
      border: 1px solid transparent;
      line-height: 1.2;
    }
    .btn-laser {
      background: linear-gradient(115deg, #fa709a, #a18cd1, #48c6ef);
      background-size: 200% 200%;
      color: #ffffff;
      box-shadow: 0 4px 14px rgba(160, 100, 240, 0.35);
    }
    .btn-laser:hover {
      background-position: right center;
      transform: translateY(-2px);
      box-shadow: 0 6px 18px rgba(160, 100, 240, 0.5);
      color: #ffffff;
    }
    .btn-outline {
      border-color: var(--border-light);
      background: #ffffff;
      color: var(--text-main);
    }
    .btn-outline:hover {
      border-color: var(--primary);
      color: var(--primary);
    }
    .mobile-menu-btn {
      display: none;
      background: none;
      border: none;
      font-size: 24px;
      color: var(--text-main);
      cursor: pointer;
    }

    /* 区域通用规范 */
    .section-wrap {
      padding: 72px 0;
      position: relative;
    }
    .section-head {
      text-align: center;
      max-width: 760px;
      margin: 0 auto 48px;
    }
    .section-head .badge {
      display: inline-block;
      font-size: 12px;
      font-weight: 700;
      padding: 4px 14px;
      border-radius: 30px;
      background: rgba(88, 66, 255, 0.08);
      color: var(--primary);
      margin-bottom: 12px;
      border: 1px solid rgba(88, 66, 255, 0.2);
    }
    .section-head h2 {
      font-size: 32px;
      font-weight: 700;
      color: #141a2e;
      margin-bottom: 12px;
      letter-spacing: -0.5px;
    }
    .section-head p {
      font-size: 15px;
      color: var(--text-muted);
    }

    /* 首屏 Hero */
    .hero-section {
      padding: 90px 0 60px;
      text-align: center;
      position: relative;
    }
    .hero-glow-sphere {
      position: absolute;
      top: -100px;
      left: 50%;
      transform: translateX(-50%);
      width: 700px;
      height: 380px;
      background: radial-gradient(circle, rgba(168, 140, 255, 0.28) 0%, rgba(72, 198, 239, 0.2) 45%, transparent 75%);
      filter: blur(50px);
      z-index: -1;
      pointer-events: none;
    }
    .hero-tag {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 6px 18px;
      background: rgba(255, 255, 255, 0.85);
      border: 1px solid rgba(170, 150, 250, 0.45);
      border-radius: 40px;
      font-size: 13px;
      font-weight: 600;
      color: #4338ca;
      box-shadow: 0 4px 16px rgba(120, 100, 240, 0.1);
      margin-bottom: 24px;
    }
    .hero-tag-dot {
      width: 8px;
      height: 8px;
      border-radius: 50%;
      background: #10b981;
      box-shadow: 0 0 8px #10b981;
    }
    .hero-title {
      font-size: 44px;
      line-height: 1.25;
      font-weight: 800;
      color: #0f172a;
      max-width: 900px;
      margin: 0 auto 20px;
      letter-spacing: -1px;
    }
    .hero-title .highlight {
      background: linear-gradient(120deg, #6366f1, #ec4899, #3b82f6);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }
    .hero-desc {
      font-size: 17px;
      color: #4b5563;
      max-width: 720px;
      margin: 0 auto 34px;
      line-height: 1.7;
    }
    .hero-actions {
      display: flex;
      justify-content: center;
      align-items: center;
      gap: 16px;
      flex-wrap: wrap;
      margin-bottom: 48px;
    }
    .hero-btn-main {
      font-size: 16px;
      padding: 13px 32px;
      border-radius: 10px;
    }

    /* 核心数据指标卡片 */
    .metric-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      max-width: 1060px;
      margin: 0 auto;
    }
    .metric-card {
      background: rgba(255, 255, 255, 0.85);
      border: 1px solid rgba(210, 220, 240, 0.7);
      backdrop-filter: blur(10px);
      border-radius: 16px;
      padding: 24px 20px;
      text-align: center;
      box-shadow: var(--card-shadow);
      transition: transform 0.25s ease, box-shadow 0.25s ease;
      position: relative;
      overflow: hidden;
    }
    .metric-card::before {
      content: "";
      position: absolute;
      top: 0;
      left: 0;
      right: 0;
      height: 3px;
      background: linear-gradient(90deg, #fa709a, #fee140, #30cfd0, #667eea);
    }
    .metric-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--card-shadow-hover);
    }
    .metric-val {
      font-size: 32px;
      font-weight: 800;
      color: #1e293b;
      margin-bottom: 6px;
      letter-spacing: -0.5px;
    }
    .metric-label {
      font-size: 13px;
      color: var(--text-sub);
      font-weight: 500;
    }

    /* 模型矩阵徽章墙 */
    .model-wall {
      margin-top: 36px;
      background: #ffffff;
      border: 1px solid var(--border-light);
      border-radius: 16px;
      padding: 24px 28px;
      box-shadow: var(--card-shadow);
    }
    .model-wall-title {
      font-size: 14px;
      font-weight: 600;
      color: var(--text-sub);
      text-transform: uppercase;
      letter-spacing: 1px;
      margin-bottom: 16px;
      text-align: center;
    }
    .tags-container {
      display: flex;
      flex-wrap: wrap;
      justify-content: center;
      gap: 10px;
    }
    .model-badge {
      display: inline-flex;
      align-items: center;
      font-size: 12px;
      font-weight: 600;
      color: #334155;
      background: #f1f5f9;
      padding: 5px 12px;
      border-radius: 20px;
      border: 1px solid #e2e8f0;
      transition: all 0.2s ease;
    }
    .model-badge:hover {
      background: #ffffff;
      border-color: #818cf8;
      color: #4f46e5;
      transform: translateY(-1px);
    }

    /* 服务卡片网格 */
    .cards-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .feature-card {
      background: var(--bg-surface);
      border: 1px solid var(--border-light);
      border-radius: 16px;
      padding: 30px;
      box-shadow: var(--card-shadow);
      transition: all 0.25s ease;
      display: flex;
      flex-direction: column;
      position: relative;
    }
    .feature-card:hover {
      transform: translateY(-5px);
      box-shadow: var(--card-shadow-hover);
      border-color: rgba(140, 120, 255, 0.4);
    }
    .card-icon {
      width: 48px;
      height: 48px;
      border-radius: 12px;
      display: flex;
      align-items: center;
      justify-content: center;
      margin-bottom: 20px;
      background: var(--soft-laser);
      color: var(--primary);
      font-size: 20px;
      font-weight: 700;
    }
    .feature-card h3 {
      font-size: 18px;
      font-weight: 700;
      color: #1e293b;
      margin-bottom: 10px;
    }
    .feature-card p {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.65;
      flex-grow: 1;
    }

    /* 案例中心图文卡片 */
    .cases-grid {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 24px;
    }
    .case-card {
      background: #ffffff;
      border: 1px solid var(--border-light);
      border-radius: 16px;
      overflow: hidden;
      box-shadow: var(--card-shadow);
      display: flex;
      flex-direction: column;
    }
    .case-img-wrap {
      width: 100%;
      height: 220px;
      background: #eef2f6;
      overflow: hidden;
    }
    .case-img-wrap img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: transform 0.4s ease;
    }
    .case-card:hover .case-img-wrap img {
      transform: scale(1.04);
    }
    .case-body {
      padding: 24px;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }
    .case-title {
      font-size: 17px;
      font-weight: 700;
      color: #0f172a;
    }
    .case-desc {
      font-size: 13px;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* 生产流程步骤 */
    .process-timeline {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      position: relative;
    }
    .process-step {
      background: #ffffff;
      border: 1px solid var(--border-light);
      border-radius: 14px;
      padding: 26px 20px;
      box-shadow: var(--card-shadow);
      position: relative;
    }
    .step-num {
      width: 34px;
      height: 34px;
      border-radius: 50%;
      background: linear-gradient(135deg, #667eea, #764ba2);
      color: #ffffff;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 14px;
      font-weight: 700;
      margin-bottom: 16px;
    }
    .step-title {
      font-size: 16px;
      font-weight: 700;
      color: #1e293b;
      margin-bottom: 8px;
    }
    .step-desc {
      font-size: 13px;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* 对比评测表格板块 */
    .compare-section-box {
      background: #ffffff;
      border: 1px solid var(--border-light);
      border-radius: 20px;
      padding: 36px;
      box-shadow: 0 16px 40px rgba(100, 110, 160, 0.08);
      position: relative;
    }
    .rating-summary-banner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      background: var(--soft-laser);
      border: 1px solid rgba(180, 160, 255, 0.4);
      border-radius: 12px;
      padding: 18px 24px;
      margin-bottom: 28px;
    }
    .rating-badge {
      display: flex;
      align-items: center;
      gap: 12px;
    }
    .score-big {
      font-size: 32px;
      font-weight: 800;
      color: #4338ca;
      line-height: 1;
    }
    .score-desc {
      font-size: 13px;
      color: #475569;
    }
    .stars-group {
      color: #f59e0b;
      font-size: 18px;
      letter-spacing: 2px;
    }
    .table-responsive {
      width: 100%;
      overflow-x: auto;
    }
    .compare-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
      min-width: 680px;
    }
    .compare-table th, .compare-table td {
      padding: 16px 18px;
      font-size: 14px;
      border-bottom: 1px solid #edf2f7;
    }
    .compare-table th {
      background: #f8fafc;
      color: #334155;
      font-weight: 700;
    }
    .compare-table tr:hover td {
      background: #f8fbff;
    }
    .col-highlight {
      background: rgba(88, 66, 255, 0.03);
      font-weight: 600;
      color: #4338ca;
    }
    .status-badge-ok {
      display: inline-block;
      padding: 3px 8px;
      background: #dcfce7;
      color: #15803d;
      border-radius: 4px;
      font-size: 12px;
      font-weight: 600;
    }
    .status-badge-sub {
      display: inline-block;
      padding: 3px 8px;
      background: #f1f5f9;
      color: #64748b;
      border-radius: 4px;
      font-size: 12px;
    }

    /* 用户评论卡片 */
    .reviews-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 22px;
    }
    .review-card {
      background: #ffffff;
      border: 1px solid var(--border-light);
      border-radius: 14px;
      padding: 24px;
      box-shadow: var(--card-shadow);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }
    .review-quote {
      font-size: 14px;
      color: #334155;
      line-height: 1.65;
      margin-bottom: 18px;
    }
    .reviewer-meta {
      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, #c3dafe, #e9d8fd);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      color: #4c51bf;
      font-size: 14px;
    }
    .reviewer-info h4 {
      font-size: 14px;
      font-weight: 700;
      color: #1e293b;
    }
    .reviewer-info p {
      font-size: 12px;
      color: var(--text-sub);
    }

    /* FAQ 折叠面板 */
    .faq-container {
      max-width: 860px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      gap: 12px;
    }
    .faq-item {
      background: #ffffff;
      border: 1px solid var(--border-light);
      border-radius: 12px;
      overflow: hidden;
      transition: border-color 0.2s ease;
    }
    .faq-item.active {
      border-color: #818cf8;
    }
    .faq-header {
      padding: 18px 22px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      cursor: pointer;
      font-size: 15px;
      font-weight: 600;
      color: #1e293b;
      user-select: none;
    }
    .faq-icon {
      font-size: 18px;
      transition: transform 0.25s ease;
      color: var(--primary);
    }
    .faq-item.active .faq-icon {
      transform: rotate(45deg);
    }
    .faq-content {
      display: none;
      padding: 0 22px 18px;
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.65;
    }
    .faq-item.active .faq-content {
      display: block;
    }

    /* 需求表单与代理板块 */
    .form-contact-wrap {
      display: grid;
      grid-template-columns: 1.1fr 0.9fr;
      gap: 32px;
      background: #ffffff;
      border: 1px solid var(--border-light);
      border-radius: 20px;
      padding: 40px;
      box-shadow: 0 16px 40px rgba(100, 110, 160, 0.08);
    }
    .form-col h3, .contact-col h3 {
      font-size: 22px;
      font-weight: 700;
      color: #0f172a;
      margin-bottom: 8px;
    }
    .form-col p, .contact-col p {
      font-size: 14px;
      color: var(--text-muted);
      margin-bottom: 24px;
    }
    .lead-form {
      display: flex;
      flex-direction: column;
      gap: 16px;
    }
    .form-group {
      display: flex;
      flex-direction: column;
      gap: 6px;
    }
    .form-group label {
      font-size: 13px;
      font-weight: 600;
      color: #334155;
    }
    .form-control {
      width: 100%;
      padding: 12px 14px;
      border: 1px solid #cbd5e1;
      border-radius: 8px;
      font-size: 14px;
      color: #1e293b;
      outline: none;
      transition: border-color 0.2s ease, box-shadow 0.2s ease;
      background: #f8fafc;
    }
    .form-control:focus {
      border-color: var(--primary);
      background: #ffffff;
      box-shadow: 0 0 0 3px rgba(88, 66, 255, 0.12);
    }
    textarea.form-control {
      resize: vertical;
      min-height: 90px;
    }

    .contact-info-list {
      display: flex;
      flex-direction: column;
      gap: 18px;
      margin-bottom: 28px;
    }
    .contact-info-item {
      display: flex;
      align-items: flex-start;
      gap: 12px;
    }
    .contact-badge {
      padding: 4px 10px;
      background: #eff6ff;
      color: #2563eb;
      border-radius: 6px;
      font-size: 12px;
      font-weight: 600;
      white-space: nowrap;
    }
    .contact-text {
      font-size: 14px;
      color: #334155;
      line-height: 1.5;
    }
    .qr-block {
      background: #f8fafc;
      border: 1px solid #e2e8f0;
      border-radius: 12px;
      padding: 18px;
      display: flex;
      align-items: center;
      gap: 18px;
    }
    .qr-img {
      width: 90px;
      height: 90px;
      border-radius: 8px;
      background: #fff;
      padding: 4px;
      border: 1px solid #cbd5e1;
      flex-shrink: 0;
    }
    .qr-img img {
      width: 100%;
      height: 100%;
      object-fit: contain;
    }
    .qr-tip h5 {
      font-size: 14px;
      font-weight: 700;
      color: #1e293b;
      margin-bottom: 4px;
    }
    .qr-tip p {
      font-size: 12px;
      color: var(--text-muted);
      margin: 0;
      line-height: 1.4;
    }

    /* 资讯与友情链接板块 */
    .post-links-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 24px;
      margin-bottom: 40px;
    }
    .post-panel, .links-panel {
      background: #ffffff;
      border: 1px solid var(--border-light);
      border-radius: 14px;
      padding: 24px;
      box-shadow: var(--card-shadow);
    }
    .panel-heading {
      font-size: 16px;
      font-weight: 700;
      color: #1e293b;
      margin-bottom: 16px;
      padding-bottom: 10px;
      border-bottom: 1px solid #edf2f7;
    }
    .post-ul {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 12px;
    }
    .post-ul li a {
      font-size: 13px;
      color: #475569;
      display: flex;
      align-items: center;
      justify-content: space-between;
    }
    .post-ul li a:hover {
      color: var(--primary);
    }
    .friend-links-box {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
    }
    .friend-links-box a {
      font-size: 13px;
      color: #475569;
      background: #f1f5f9;
      padding: 6px 14px;
      border-radius: 6px;
      border: 1px solid #e2e8f0;
    }
    .friend-links-box a:hover {
      background: #e2e8f0;
      color: var(--primary);
    }

    /* 页脚 */
    .site-footer {
      background: #0f172a;
      color: #cbd5e1;
      padding: 50px 0 24px;
      border-top: 1px solid #1e293b;
    }
    .footer-inner {
      display: flex;
      justify-content: space-between;
      align-items: flex-start;
      gap: 40px;
      padding-bottom: 30px;
      border-bottom: 1px solid #334155;
    }
    .footer-brand h4 {
      font-size: 20px;
      font-weight: 700;
      color: #ffffff;
      margin-bottom: 10px;
    }
    .footer-brand p {
      font-size: 13px;
      color: #94a3b8;
      max-width: 360px;
      line-height: 1.6;
    }
    .footer-nav-col h5 {
      font-size: 14px;
      font-weight: 600;
      color: #ffffff;
      margin-bottom: 14px;
    }
    .footer-nav-col ul {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 8px;
    }
    .footer-nav-col ul li a {
      font-size: 13px;
      color: #94a3b8;
    }
    .footer-nav-col ul li a:hover {
      color: #ffffff;
    }
    .footer-bottom {
      padding-top: 20px;
      text-align: center;
      font-size: 12px;
      color: #64748b;
    }

    /* 悬浮小组件 */
    .float-dock {
      position: fixed;
      right: 20px;
      bottom: 30px;
      z-index: 990;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }
    .dock-btn {
      width: 44px;
      height: 44px;
      border-radius: 50%;
      background: #ffffff;
      border: 1px solid #cbd5e1;
      box-shadow: 0 4px 14px rgba(0,0,0,0.12);
      display: flex;
      align-items: center;
      justify-content: center;
      cursor: pointer;
      color: #334155;
      font-size: 16px;
      transition: all 0.25s ease;
    }
    .dock-btn:hover {
      background: var(--primary);
      color: #ffffff;
      border-color: var(--primary);
    }

    /* 响应式断点 */
    @media (max-width: 992px) {
      .metric-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .cards-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .process-timeline {
        grid-template-columns: repeat(2, 1fr);
      }
      .reviews-grid {
        grid-template-columns: repeat(1, 1fr);
      }
      .form-contact-wrap {
        grid-template-columns: 1fr;
      }
      .cases-grid {
        grid-template-columns: 1fr;
      }
      .post-links-grid {
        grid-template-columns: 1fr;
      }
      .footer-inner {
        flex-direction: column;
      }
    }

    @media (max-width: 768px) {
      .mobile-menu-btn {
        display: block;
      }
      .nav-links {
        display: none;
        position: absolute;
        top: 72px;
        left: 0;
        right: 0;
        background: #ffffff;
        flex-direction: column;
        padding: 16px 20px;
        box-shadow: 0 10px 20px rgba(0,0,0,0.1);
        border-bottom: 1px solid var(--border-light);
      }
      .nav-links.active {
        display: flex;
      }
      .nav-links li {
        width: 100%;
      }
      .nav-links li a {
        display: block;
        padding: 10px 0;
      }
      .hero-title {
        font-size: 30px;
      }
      .metric-grid {
        grid-template-columns: 1fr;
      }
      .cards-grid {
        grid-template-columns: 1fr;
      }
      .process-timeline {
        grid-template-columns: 1fr;
      }
      .header-action .btn-outline {
        display: none;
      }
      .section-wrap {
        padding: 48px 0;
      }
      .compare-section-box {
        padding: 20px 16px;
      }
      .form-contact-wrap {
        padding: 24px 18px;
      }
    }