:root {
      --c-bg: #f8fafc;
      --c-surface: #ffffff;
      --c-primary: #1e1b4b;
      --c-accent-pink: #f43f5e;
      --c-accent-cyan: #06b6d4;
      --c-accent-yellow: #f59e0b;
      --c-accent-purple: #8b5cf6;
      --c-accent-green: #10b981;
      --c-text-main: #0f172a;
      --c-text-muted: #475569;
      --c-border: #e2e8f0;
      --shadow-sm: 0 2px 4px rgba(0,0,0,0.04);
      --shadow-md: 0 6px 18px rgba(0,0,0,0.06);
      --shadow-lg: 0 12px 30px rgba(0,0,0,0.08);
      --shadow-pop: 4px 4px 0px #0f172a;
      --radius-sm: 8px;
      --radius-md: 14px;
      --radius-lg: 20px;
      --transition: all 0.25s ease;
    }

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

    html {
      scroll-behavior: smooth;
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      background-color: var(--c-bg);
      color: var(--c-text-main);
    }

    body {
      background: linear-gradient(180deg, #ffffff 0%, #f1f5f9 50%, #f8fafc 100%);
      line-height: 1.6;
      font-size: 16px;
      overflow-x: hidden;
    }

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

    /* 头部导航 */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 100;
      background: rgba(255, 255, 255, 0.95);
      backdrop-filter: blur(10px);
      border-bottom: 2px solid var(--c-text-main);
      box-shadow: 0 2px 10px rgba(0,0,0,0.03);
    }

    .nav-wrapper {
      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;
      display: block;
    }

    .brand-name {
      font-size: 1.35rem;
      font-weight: 800;
      color: var(--c-text-main);
      letter-spacing: -0.5px;
    }

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

    .nav-links a {
      color: var(--c-text-main);
      text-decoration: none;
      font-weight: 600;
      font-size: 0.92rem;
      padding: 8px 12px;
      border-radius: var(--radius-sm);
      transition: var(--transition);
    }

    .nav-links a:hover {
      background-color: #fee2e2;
      color: var(--c-accent-pink);
    }

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

    .btn-top-brand {
      background: var(--c-accent-pink);
      color: #ffffff;
      padding: 10px 20px;
      font-weight: 700;
      border-radius: var(--radius-sm);
      text-decoration: none;
      border: 2px solid var(--c-text-main);
      box-shadow: 3px 3px 0px var(--c-text-main);
      transition: var(--transition);
      display: inline-flex;
      align-items: center;
    }

    .btn-top-brand:hover {
      transform: translate(-2px, -2px);
      box-shadow: 5px 5px 0px var(--c-text-main);
      background: #e11d48;
      color: #ffffff;
    }

    .menu-toggle {
      display: none;
      background: none;
      border: 2px solid var(--c-text-main);
      padding: 6px 10px;
      font-size: 1.2rem;
      cursor: pointer;
      border-radius: var(--radius-sm);
    }

    /* 英雄区 (无图片，纯色渐变撞色) */
    .hero-section {
      padding: 70px 0 60px;
      position: relative;
      background: linear-gradient(135deg, #fff1f2 0%, #e0f2fe 50%, #fef3c7 100%);
      border-bottom: 2px solid var(--c-text-main);
    }

    .hero-content {
      text-align: center;
      max-width: 960px;
      margin: 0 auto;
    }

    .badge-label {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      background: #ffffff;
      border: 2px solid var(--c-text-main);
      box-shadow: 3px 3px 0px var(--c-text-main);
      padding: 6px 16px;
      border-radius: 999px;
      font-size: 0.9rem;
      font-weight: 700;
      color: var(--c-accent-purple);
      margin-bottom: 24px;
    }

    .hero-title {
      font-size: 2.8rem;
      font-weight: 900;
      line-height: 1.25;
      color: var(--c-text-main);
      margin-bottom: 20px;
      letter-spacing: -1px;
    }

    .hero-title span {
      background: #ffe4e6;
      border: 2px solid var(--c-text-main);
      padding: 2px 10px;
      border-radius: 6px;
      box-shadow: 3px 3px 0px var(--c-text-main);
      color: var(--c-accent-pink);
    }

    .hero-desc {
      font-size: 1.15rem;
      color: var(--c-text-muted);
      max-width: 780px;
      margin: 0 auto 36px;
    }

    .hero-cta-group {
      display: flex;
      justify-content: center;
      align-items: center;
      gap: 16px;
      flex-wrap: wrap;
      margin-bottom: 40px;
    }

    .btn-hero-primary {
      background: #4f46e5;
      color: #ffffff;
      font-size: 1.15rem;
      font-weight: 800;
      padding: 14px 34px;
      border-radius: var(--radius-md);
      text-decoration: none;
      border: 2px solid var(--c-text-main);
      box-shadow: 4px 4px 0px var(--c-text-main);
      transition: var(--transition);
      display: inline-flex;
      align-items: center;
      gap: 8px;
    }

    .btn-hero-primary:hover {
      background: #4338ca;
      color: #ffffff;
      transform: translate(-3px, -3px);
      box-shadow: 7px 7px 0px var(--c-text-main);
    }

    .btn-hero-secondary {
      background: #facc15;
      color: var(--c-text-main);
      font-size: 1.15rem;
      font-weight: 800;
      padding: 14px 30px;
      border-radius: var(--radius-md);
      text-decoration: none;
      border: 2px solid var(--c-text-main);
      box-shadow: 4px 4px 0px var(--c-text-main);
      transition: var(--transition);
    }

    .btn-hero-secondary:hover {
      background: #eab308;
      transform: translate(-3px, -3px);
      box-shadow: 7px 7px 0px var(--c-text-main);
    }

    .hero-metrics {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 16px;
      margin-top: 20px;
    }

    .metric-card {
      background: #ffffff;
      border: 2px solid var(--c-text-main);
      box-shadow: 4px 4px 0px var(--c-text-main);
      border-radius: var(--radius-md);
      padding: 18px 12px;
      text-align: center;
    }

    .metric-card strong {
      display: block;
      font-size: 1.7rem;
      font-weight: 900;
      color: var(--c-text-main);
      margin-bottom: 4px;
    }

    .metric-card span {
      font-size: 0.88rem;
      color: var(--c-text-muted);
      font-weight: 600;
    }

    /* 通用Section */
    .section-wrap {
      padding: 70px 0;
      border-bottom: 2px solid var(--c-border);
    }

    .section-header {
      text-align: center;
      max-width: 760px;
      margin: 0 auto 50px;
    }

    .section-tag {
      display: inline-block;
      font-weight: 800;
      font-size: 0.85rem;
      text-transform: uppercase;
      letter-spacing: 1px;
      padding: 4px 12px;
      border: 2px solid var(--c-text-main);
      border-radius: 999px;
      background: #ecfdf5;
      color: var(--c-accent-green);
      box-shadow: 2px 2px 0px var(--c-text-main);
      margin-bottom: 12px;
    }

    .section-title {
      font-size: 2.1rem;
      font-weight: 800;
      color: var(--c-text-main);
      line-height: 1.3;
      margin-bottom: 14px;
    }

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

    /* 平台介绍 */
    .intro-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 32px;
      align-items: center;
    }

    .intro-box {
      background: #ffffff;
      border: 2px solid var(--c-text-main);
      border-radius: var(--radius-lg);
      padding: 36px;
      box-shadow: var(--shadow-pop);
    }

    .intro-box h3 {
      font-size: 1.5rem;
      margin-bottom: 16px;
      font-weight: 800;
    }

    .intro-points {
      list-style: none;
      margin: 20px 0;
    }

    .intro-points li {
      position: relative;
      padding-left: 28px;
      margin-bottom: 12px;
      font-weight: 600;
      color: var(--c-text-muted);
    }

    .intro-points li::before {
      content: "✓";
      position: absolute;
      left: 0;
      color: var(--c-accent-green);
      font-weight: 900;
      font-size: 1.2rem;
      line-height: 1;
    }

    .intro-side {
      display: grid;
      grid-template-columns: 1fr;
      gap: 16px;
    }

    .intro-card {
      background: #fffbeb;
      border: 2px solid var(--c-text-main);
      border-radius: var(--radius-md);
      padding: 20px;
      box-shadow: 3px 3px 0px var(--c-text-main);
    }

    .intro-card h4 {
      font-size: 1.15rem;
      margin-bottom: 8px;
      color: #92400e;
    }

    /* 服务能力卡片 */
    .services-grid {
      display: grid;
      grid-template-columns: repeat(auto-fill, minmax(270px, 1fr));
      gap: 20px;
    }

    .service-card {
      background: #ffffff;
      border: 2px solid var(--c-text-main);
      border-radius: var(--radius-md);
      padding: 24px;
      box-shadow: var(--shadow-pop);
      transition: var(--transition);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .service-card:hover {
      transform: translateY(-4px);
      box-shadow: 6px 6px 0px var(--c-text-main);
    }

    .service-pill {
      display: inline-block;
      padding: 4px 10px;
      border-radius: 6px;
      font-size: 0.78rem;
      font-weight: 700;
      border: 1px solid var(--c-text-main);
      width: fit-content;
      margin-bottom: 12px;
      background: #e0e7ff;
      color: #3730a3;
    }

    .service-card h3 {
      font-size: 1.2rem;
      font-weight: 800;
      margin-bottom: 10px;
    }

    .service-card p {
      font-size: 0.92rem;
      color: var(--c-text-muted);
      line-height: 1.5;
    }

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

    .process-step {
      background: #ffffff;
      border: 2px solid var(--c-text-main);
      border-radius: var(--radius-md);
      padding: 24px;
      position: relative;
      box-shadow: var(--shadow-pop);
    }

    .step-num {
      width: 44px;
      height: 44px;
      background: #f43f5e;
      color: #ffffff;
      border: 2px solid var(--c-text-main);
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 900;
      font-size: 1.2rem;
      margin-bottom: 16px;
    }

    .process-step h4 {
      font-size: 1.15rem;
      font-weight: 800;
      margin-bottom: 8px;
    }

    .process-step p {
      font-size: 0.9rem;
      color: var(--c-text-muted);
    }

    /* 案例图片区 */
    .banner-gallery {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 24px;
      margin-bottom: 30px;
    }

    .banner-item {
      border: 2px solid var(--c-text-main);
      border-radius: var(--radius-md);
      overflow: hidden;
      background: #ffffff;
      box-shadow: var(--shadow-pop);
    }

    .banner-item img {
      width: 100%;
      height: auto;
      display: block;
      transition: transform 0.3s ease;
    }

    .banner-item:hover img {
      transform: scale(1.02);
    }

    .gallery-caption {
      padding: 14px 18px;
      background: #ffffff;
      font-size: 0.95rem;
      font-weight: 700;
      border-top: 2px solid var(--c-text-main);
      display: flex;
      justify-content: space-between;
      align-items: center;
    }

    .square-materials {
      display: grid;
      grid-template-columns: 1fr 2fr;
      gap: 24px;
      background: #f0fdf4;
      border: 2px solid var(--c-text-main);
      border-radius: var(--radius-lg);
      padding: 28px;
      box-shadow: var(--shadow-pop);
      align-items: center;
    }

    .square-img-wrap {
      border: 2px solid var(--c-text-main);
      border-radius: var(--radius-md);
      overflow: hidden;
      background: #ffffff;
    }

    .square-img-wrap img {
      width: 100%;
      height: auto;
      display: block;
    }

    /* 对比评测板块 */
    .compare-container {
      background: #ffffff;
      border: 2px solid var(--c-text-main);
      border-radius: var(--radius-lg);
      padding: 32px;
      box-shadow: var(--shadow-pop);
    }

    .compare-badge-box {
      display: flex;
      align-items: center;
      justify-content: space-between;
      background: #fef08a;
      border: 2px solid var(--c-text-main);
      border-radius: var(--radius-md);
      padding: 20px 24px;
      margin-bottom: 24px;
    }

    .score-title {
      font-size: 1.3rem;
      font-weight: 800;
    }

    .score-value {
      font-size: 1.6rem;
      font-weight: 900;
      color: #b45309;
    }

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

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

    .custom-table th, .custom-table td {
      padding: 16px;
      border: 1px solid var(--c-border);
      font-size: 0.95rem;
    }

    .custom-table th {
      background: #f1f5f9;
      font-weight: 800;
      color: var(--c-text-main);
    }

    .custom-table .highlight-col {
      background: #fff1f2;
      font-weight: 700;
      color: #9f1239;
      border-left: 2px solid var(--c-accent-pink);
      border-right: 2px solid var(--c-accent-pink);
    }

    /* 客户评论 */
    .reviews-grid {
      display: grid;
      grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
      gap: 20px;
    }

    .review-card {
      background: #ffffff;
      border: 2px solid var(--c-text-main);
      border-radius: var(--radius-md);
      padding: 24px;
      box-shadow: var(--shadow-pop);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .review-header {
      display: flex;
      align-items: center;
      gap: 12px;
      margin-bottom: 14px;
    }

    .reviewer-avatar {
      width: 44px;
      height: 44px;
      background: #cbd5e1;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 900;
      border: 2px solid var(--c-text-main);
    }

    .reviewer-info h4 {
      font-size: 1rem;
      font-weight: 800;
    }

    .reviewer-info span {
      font-size: 0.8rem;
      color: var(--c-text-muted);
    }

    .review-stars {
      color: #f59e0b;
      margin-bottom: 10px;
    }

    .review-card p {
      font-size: 0.92rem;
      color: var(--c-text-muted);
      line-height: 1.5;
    }

    /* FAQ 折叠面板 */
    .faq-list {
      max-width: 920px;
      margin: 0 auto;
    }

    .faq-item {
      background: #ffffff;
      border: 2px solid var(--c-text-main);
      border-radius: var(--radius-md);
      margin-bottom: 14px;
      box-shadow: 3px 3px 0px var(--c-text-main);
      overflow: hidden;
    }

    .faq-question {
      width: 100%;
      text-align: left;
      padding: 18px 20px;
      background: none;
      border: none;
      font-size: 1.05rem;
      font-weight: 800;
      color: var(--c-text-main);
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
    }

    .faq-icon {
      font-weight: 900;
      transition: transform 0.2s;
    }

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

    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s ease;
      background: #f8fafc;
      border-top: 1px solid var(--c-border);
    }

    .faq-answer-inner {
      padding: 18px 20px;
      font-size: 0.95rem;
      color: var(--c-text-muted);
      line-height: 1.6;
    }

    /* 文章列表 & 代理加盟 */
    .articles-grid {
      display: grid;
      grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
      gap: 16px;
      margin-top: 20px;
    }

    .article-card {
      background: #ffffff;
      border: 2px solid var(--c-text-main);
      border-radius: var(--radius-sm);
      padding: 16px;
      text-decoration: none;
      color: var(--c-text-main);
      font-weight: 700;
      box-shadow: 3px 3px 0px var(--c-text-main);
      transition: var(--transition);
      display: block;
    }

    .article-card:hover {
      background: #ecfeff;
      transform: translateY(-2px);
      box-shadow: 5px 5px 0px var(--c-text-main);
    }

    /* 表单与联系 */
    .contact-form-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 36px;
    }

    .form-wrapper {
      background: #ffffff;
      border: 2px solid var(--c-text-main);
      border-radius: var(--radius-lg);
      padding: 36px;
      box-shadow: var(--shadow-pop);
    }

    .form-group {
      margin-bottom: 18px;
    }

    .form-group label {
      display: block;
      font-weight: 700;
      margin-bottom: 6px;
      font-size: 0.92rem;
    }

    .form-control {
      width: 100%;
      padding: 12px 14px;
      border: 2px solid var(--c-text-main);
      border-radius: var(--radius-sm);
      font-size: 0.95rem;
      background: #ffffff;
      transition: var(--transition);
    }

    .form-control:focus {
      outline: none;
      border-color: #4f46e5;
      box-shadow: 2px 2px 0px #4f46e5;
    }

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

    .btn-submit {
      width: 100%;
      background: #06b6d4;
      color: #ffffff;
      font-weight: 800;
      padding: 14px;
      font-size: 1.05rem;
      border: 2px solid var(--c-text-main);
      border-radius: var(--radius-md);
      box-shadow: 3px 3px 0px var(--c-text-main);
      cursor: pointer;
      transition: var(--transition);
    }

    .btn-submit:hover {
      background: #0891b2;
      transform: translate(-2px, -2px);
      box-shadow: 5px 5px 0px var(--c-text-main);
    }

    .contact-card-box {
      display: flex;
      flex-direction: column;
      gap: 20px;
    }

    .contact-detail-card {
      background: #ffffff;
      border: 2px solid var(--c-text-main);
      border-radius: var(--radius-md);
      padding: 24px;
      box-shadow: var(--shadow-pop);
    }

    .kefu-qrcode-wrap {
      text-align: center;
      background: #fff1f2;
      border: 2px solid var(--c-text-main);
      border-radius: var(--radius-md);
      padding: 20px;
      box-shadow: var(--shadow-pop);
    }

    .kefu-qrcode-wrap img {
      width: 150px;
      height: 150px;
      display: block;
      margin: 0 auto 12px;
      border: 2px solid var(--c-text-main);
      border-radius: var(--radius-sm);
    }

    /* 友情链接与页脚 */
    .links-section {
      background: #f1f5f9;
      border-top: 2px solid var(--c-text-main);
      padding: 30px 0;
    }

    .friendly-links {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
      align-items: center;
    }

    .friendly-links a {
      color: var(--c-text-main);
      text-decoration: none;
      font-weight: 600;
      background: #ffffff;
      border: 1px solid var(--c-text-main);
      padding: 6px 14px;
      border-radius: 6px;
      font-size: 0.88rem;
      transition: var(--transition);
    }

    .friendly-links a:hover {
      background: #e2e8f0;
      color: #000;
    }

    .site-footer {
      background: #0f172a;
      color: #ffffff;
      padding: 40px 0 30px;
      border-top: 2px solid var(--c-text-main);
    }

    .footer-inner {
      display: flex;
      justify-content: space-between;
      align-items: center;
      flex-wrap: wrap;
      gap: 20px;
    }

    .footer-brand h4 {
      font-size: 1.25rem;
      font-weight: 800;
      margin-bottom: 6px;
      color: #f8fafc;
    }

    .footer-brand p {
      font-size: 0.88rem;
      color: #94a3b8;
    }

    .footer-copyright {
      font-size: 0.85rem;
      color: #94a3b8;
      text-align: right;
    }

    /* 浮动工具 */
    .float-kefu {
      position: fixed;
      right: 20px;
      bottom: 30px;
      z-index: 99;
      background: #f43f5e;
      color: #ffffff;
      width: 52px;
      height: 52px;
      border-radius: 50%;
      border: 2px solid var(--c-text-main);
      box-shadow: 3px 3px 0px var(--c-text-main);
      display: flex;
      align-items: center;
      justify-content: center;
      cursor: pointer;
      text-decoration: none;
      font-weight: 800;
      font-size: 0.85rem;
      text-align: center;
    }

    .float-kefu:hover {
      background: #e11d48;
      transform: scale(1.05);
    }

    /* 移动端响应式 */
    @media (max-width: 992px) {
      .hero-title {
        font-size: 2.2rem;
      }
      .hero-metrics {
        grid-template-columns: repeat(2, 1fr);
      }
      .intro-grid, .contact-form-grid, .square-materials {
        grid-template-columns: 1fr;
      }
      .process-timeline {
        grid-template-columns: repeat(2, 1fr);
      }
      .banner-gallery {
        grid-template-columns: 1fr;
      }
    }

    @media (max-width: 768px) {
      .menu-toggle {
        display: block;
      }
      .nav-links {
        display: none;
        flex-direction: column;
        position: absolute;
        top: 72px;
        left: 0;
        width: 100%;
        background: #ffffff;
        border-bottom: 2px solid var(--c-text-main);
        padding: 16px 20px;
        box-shadow: 0 4px 10px rgba(0,0,0,0.1);
      }
      .nav-links.active {
        display: flex;
      }
      .nav-links a {
        padding: 10px 0;
        width: 100%;
        border-bottom: 1px solid var(--c-border);
      }
      .hero-title {
        font-size: 1.8rem;
      }
      .hero-metrics, .process-timeline {
        grid-template-columns: 1fr;
      }
      .footer-inner {
        flex-direction: column;
        text-align: center;
      }
      .footer-copyright {
        text-align: center;
      }
    }