/* 多彩涂鸦风格 (Neo-Brutalism + Graffiti elements) */
    :root {
      --bg-color: #faf9f6;
      --dark-color: #1a1a1a;
      --primary-yellow: #ffd000;
      --primary-pink: #ff60a8;
      --primary-cyan: #39e3e3;
      --primary-green: #37d67a;
      --primary-orange: #ff7824;
      --card-shadow: 6px 6px 0px #1a1a1a;
      --btn-shadow: 4px 4px 0px #1a1a1a;
      --max-width: 1200px;
    }

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

    body {
      background-color: var(--bg-color);
      color: var(--dark-color);
      font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
      line-height: 1.6;
      overflow-x: hidden;
    }

    /* 容器规范 */
    .container {
      width: 100%;
      max-width: var(--max-width);
      margin: 0 auto;
      padding: 0 20px;
    }

    /* 涂鸦风标题与组件修饰 */
    .section-title {
      font-size: 2.2rem;
      text-align: center;
      margin-bottom: 40px;
      display: inline-block;
      position: relative;
      background: var(--primary-yellow);
      padding: 10px 20px;
      border: 3px solid var(--dark-color);
      box-shadow: var(--card-shadow);
      transform: rotate(-1deg);
    }
    .section-title-wrap {
      text-align: center;
      margin-bottom: 50px;
    }

    /* 导航栏 */
    header {
      background-color: #ffffff;
      border-bottom: 4px solid var(--dark-color);
      position: sticky;
      top: 0;
      z-index: 100;
    }
    .nav-container {
      display: flex;
      justify-content: space-between;
      align-items: center;
      height: 80px;
    }
    .logo-area {
      display: flex;
      align-items: center;
      gap: 10px;
    }
    .logo-area img {
      height: 50px;
      width: auto;
    }
    .nav-menu {
      display: flex;
      gap: 20px;
      align-items: center;
    }
    .nav-menu a {
      color: var(--dark-color);
      text-decoration: none;
      font-weight: 700;
      padding: 8px 12px;
      border: 2px solid transparent;
      transition: all 0.2s ease;
    }
    .nav-menu a:hover {
      background-color: var(--primary-cyan);
      border-color: var(--dark-color);
      transform: translate(-2px, -2px);
      box-shadow: 3px 3px 0px var(--dark-color);
    }
    .nav-toggle {
      display: none;
      flex-direction: column;
      gap: 5px;
      cursor: pointer;
      background: none;
      border: 3px solid var(--dark-color);
      padding: 8px;
    }
    .nav-toggle span {
      display: block;
      width: 25px;
      height: 3px;
      background-color: var(--dark-color);
    }

    /* 首屏 Hero (禁止出现图片) */
    .hero-section {
      padding: 80px 0;
      background: radial-gradient(circle at 10% 20%, rgb(255, 252, 237) 0%, rgb(255, 240, 243) 90.5%);
      border-bottom: 4px solid var(--dark-color);
      text-align: center;
    }
    .hero-h1 {
      font-size: 2.8rem;
      line-height: 1.2;
      margin-bottom: 20px;
      display: inline-block;
      background-color: var(--primary-pink);
      padding: 15px 30px;
      border: 4px solid var(--dark-color);
      box-shadow: 8px 8px 0px var(--dark-color);
      transform: rotate(1deg);
      color: #fff;
      text-shadow: 2px 2px 0px var(--dark-color);
    }
    .hero-subtitle {
      font-size: 1.4rem;
      font-weight: 600;
      margin: 30px auto;
      max-width: 800px;
      background: #fff;
      padding: 10px;
      border: 3px solid var(--dark-color);
      box-shadow: 4px 4px 0px var(--dark-color);
    }
    .hero-tagline {
      font-size: 1.1rem;
      color: #555;
      margin-bottom: 40px;
    }
    .hero-buttons {
      display: flex;
      justify-content: center;
      gap: 20px;
      flex-wrap: wrap;
    }
    .btn {
      display: inline-block;
      padding: 15px 30px;
      font-size: 1.2rem;
      font-weight: 800;
      text-decoration: none;
      color: var(--dark-color);
      border: 3px solid var(--dark-color);
      box-shadow: var(--btn-shadow);
      cursor: pointer;
      transition: all 0.15s ease;
    }
    .btn-primary {
      background-color: var(--primary-yellow);
    }
    .btn-primary:hover {
      background-color: #ffe054;
      transform: translate(-3px, -3px);
      box-shadow: 7px 7px 0px var(--dark-color);
    }
    .btn-secondary {
      background-color: var(--primary-cyan);
    }
    .btn-secondary:hover {
      background-color: #5ff5f5;
      transform: translate(-3px, -3px);
      box-shadow: 7px 7px 0px var(--dark-color);
    }

    /* 通用区块 */
    .section-padding {
      padding: 80px 0;
      border-bottom: 4px solid var(--dark-color);
    }
    .bg-white {
      background-color: #ffffff;
    }
    .bg-pink {
      background-color: #fff0f5;
    }
    .bg-green {
      background-color: #f0fdf4;
    }

    /* 关于我们 & 介绍 */
    .intro-grid {
      display: grid;
      grid-template-columns: 1.2fr 0.8fr;
      gap: 40px;
      align-items: center;
    }
    .intro-content {
      border: 3px solid var(--dark-color);
      padding: 40px;
      background: #ffffff;
      box-shadow: var(--card-shadow);
    }
    .intro-content p {
      margin-bottom: 20px;
      font-size: 1.1rem;
    }
    .highlight-box {
      background-color: var(--primary-green);
      padding: 10px;
      font-weight: bold;
      border: 2px solid var(--dark-color);
      display: inline-block;
      margin-bottom: 15px;
    }

    /* 数据指标卡片 */
    .stats-row {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      margin-top: 40px;
    }
    .stat-card {
      background: #fff;
      border: 3px solid var(--dark-color);
      padding: 25px;
      text-align: center;
      box-shadow: var(--card-shadow);
      transform: rotate(calc(var(--r, 0) * 1deg));
    }
    .stat-card:nth-child(1) { --r: -1.5; }
    .stat-card:nth-child(2) { --r: 1.2; }
    .stat-card:nth-child(3) { --r: -1; }
    .stat-card:nth-child(4) { --r: 2; }
    .stat-number {
      font-size: 2.5rem;
      font-weight: 900;
      color: var(--primary-pink);
      margin-bottom: 10px;
    }

    /* 卡片网格布局 */
    .card-grid-3 {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
      gap: 30px;
    }
    .card-grid-4 {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
      gap: 25px;
    }

    /* 多彩涂鸦风卡片 */
    .fancy-card {
      background-color: #fff;
      border: 3px solid var(--dark-color);
      padding: 30px;
      box-shadow: var(--card-shadow);
      transition: all 0.2s ease;
      position: relative;
    }
    .fancy-card:hover {
      transform: translate(-4px, -4px);
      box-shadow: 10px 10px 0px var(--dark-color);
    }
    .fancy-card.yellow { border-top: 15px solid var(--primary-yellow); }
    .fancy-card.pink { border-top: 15px solid var(--primary-pink); }
    .fancy-card.cyan { border-top: 15px solid var(--primary-cyan); }
    .fancy-card.orange { border-top: 15px solid var(--primary-orange); }
    
    .card-badge {
      display: inline-block;
      padding: 4px 10px;
      background: var(--dark-color);
      color: #fff;
      font-size: 0.85rem;
      font-weight: 700;
      margin-bottom: 15px;
    }
    .card-title {
      font-size: 1.4rem;
      font-weight: 800;
      margin-bottom: 15px;
    }
    .card-list {
      list-style: none;
      margin-top: 15px;
    }
    .card-list li {
      padding-left: 20px;
      position: relative;
      margin-bottom: 8px;
      font-size: 0.95rem;
    }
    .card-list li::before {
      content: "✦";
      position: absolute;
      left: 0;
      color: var(--primary-pink);
    }

    /* 流程步骤 */
    .flow-steps {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      position: relative;
    }
    .flow-step {
      background: #fff;
      border: 3px solid var(--dark-color);
      padding: 30px 20px;
      box-shadow: var(--card-shadow);
      text-align: center;
      position: relative;
    }
    .flow-step-num {
      width: 50px;
      height: 50px;
      line-height: 44px;
      font-size: 1.5rem;
      font-weight: 900;
      border: 3px solid var(--dark-color);
      border-radius: 50%;
      background: var(--primary-yellow);
      margin: -50px auto 20px auto;
      box-shadow: 3px 3px 0px var(--dark-color);
    }

    /* 技术标准 / 比价表格 */
    .table-container {
      overflow-x: auto;
      border: 3px solid var(--dark-color);
      box-shadow: var(--card-shadow);
      background: #fff;
      margin: 30px 0;
    }
    .fancy-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
      min-width: 600px;
    }
    .fancy-table th {
      background-color: var(--dark-color);
      color: #fff;
      padding: 15px 20px;
      font-weight: 700;
    }
    .fancy-table td {
      padding: 15px 20px;
      border-bottom: 3px solid var(--dark-color);
      font-weight: 600;
    }
    .fancy-table tr:last-child td {
      border-bottom: none;
    }
    .fancy-table tr:nth-child(even) {
      background-color: #fcfbf8;
    }
    .recommend-badge {
      background: var(--primary-pink);
      color: #fff;
      padding: 4px 8px;
      border: 2px solid var(--dark-color);
      font-weight: bold;
      box-shadow: 2px 2px 0px var(--dark-color);
    }

    /* 对比评测大板块 */
    .review-score-box {
      border: 4px solid var(--dark-color);
      background-color: var(--primary-yellow);
      padding: 30px;
      text-align: center;
      box-shadow: var(--card-shadow);
      max-width: 600px;
      margin: 0 auto 40px auto;
      transform: rotate(-1deg);
    }
    .review-score {
      font-size: 4rem;
      font-weight: 900;
      color: var(--dark-color);
      line-height: 1;
    }
    .review-stars {
      color: var(--primary-pink);
      font-size: 2rem;
      margin: 10px 0;
    }

    /* 标签云 */
    .tag-cloud {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
      justify-content: center;
      margin-top: 30px;
    }
    .tag-item {
      padding: 8px 16px;
      background: #fff;
      border: 2px solid var(--dark-color);
      font-weight: bold;
      box-shadow: 3px 3px 0px var(--dark-color);
      cursor: default;
    }
    .tag-item:nth-child(2n) { background-color: var(--primary-cyan); }
    .tag-item:nth-child(3n) { background-color: var(--primary-pink); }
    .tag-item:nth-child(4n) { background-color: var(--primary-yellow); }

    /* 案例展示图片区 */
    .case-gallery {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
      gap: 25px;
    }
    .case-item {
      background: #fff;
      border: 3px solid var(--dark-color);
      box-shadow: var(--card-shadow);
      overflow: hidden;
      display: flex;
      flex-direction: column;
    }
    .case-image-wrap {
      border-bottom: 3px solid var(--dark-color);
      overflow: hidden;
      aspect-ratio: 16 / 10;
      background: #eee;
      display: flex;
      align-items: center;
      justify-content: center;
    }
    .case-image-wrap img {
      width: 100%;
      height: 100%;
      object-fit: cover;
    }
    .case-info {
      padding: 20px;
    }

    /* FAQ 折叠面板 */
    .faq-wrapper {
      max-width: 800px;
      margin: 0 auto;
    }
    .faq-item {
      border: 3px solid var(--dark-color);
      background: #fff;
      margin-bottom: 15px;
      box-shadow: var(--card-shadow);
    }
    .faq-header {
      padding: 20px;
      font-weight: 800;
      font-size: 1.1rem;
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      background: #fff;
      user-select: none;
    }
    .faq-header::after {
      content: "+";
      font-size: 1.5rem;
      font-weight: bold;
      transition: transform 0.2s ease;
    }
    .faq-item.active .faq-header::after {
      content: "-";
    }
    .faq-body {
      padding: 0 20px;
      max-height: 0;
      overflow: hidden;
      transition: all 0.3s ease;
      background: #fbfbf9;
      border-top: 0px solid var(--dark-color);
    }
    .faq-item.active .faq-body {
      padding: 20px;
      max-height: 300px;
      border-top: 3px solid var(--dark-color);
    }

    /* 客户评论 */
    .reviews-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
      gap: 30px;
    }
    .review-card {
      background: #fff;
      border: 3px solid var(--dark-color);
      padding: 25px;
      box-shadow: var(--card-shadow);
      position: relative;
    }
    .review-author {
      display: flex;
      align-items: center;
      gap: 15px;
      margin-top: 20px;
      border-top: 2px dashed var(--dark-color);
      padding-top: 15px;
    }
    .author-avatar {
      width: 45px;
      height: 45px;
      border-radius: 50%;
      background: var(--primary-cyan);
      border: 2px solid var(--dark-color);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: bold;
    }

    /* 文章列表 */
    .article-section {
      background-color: #fffbf0;
    }
    .article-list {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
      gap: 20px;
    }
    .article-item {
      background: #fff;
      border: 3px solid var(--dark-color);
      padding: 20px;
      box-shadow: var(--card-shadow);
    }
    .article-link {
      color: var(--dark-color);
      text-decoration: none;
      font-weight: 800;
      font-size: 1.05rem;
      display: block;
      margin-bottom: 10px;
    }
    .article-link:hover {
      color: var(--primary-pink);
      text-decoration: underline;
    }

    /* 智能需求匹配与表单 */
    .form-box {
      max-width: 650px;
      margin: 0 auto;
      background: #fff;
      border: 3px solid var(--dark-color);
      padding: 40px;
      box-shadow: var(--card-shadow);
    }
    .form-group {
      margin-bottom: 20px;
    }
    .form-label {
      display: block;
      font-weight: 800;
      margin-bottom: 8px;
    }
    .form-control {
      width: 100%;
      padding: 12px 15px;
      border: 3px solid var(--dark-color);
      font-size: 1rem;
      font-family: inherit;
      background-color: var(--bg-color);
      outline: none;
    }
    .form-control:focus {
      background-color: #fff;
      border-color: var(--primary-cyan);
    }

    /* 微信及联系板块 */
    .contact-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
      gap: 30px;
    }
    .contact-card {
      background: #fff;
      border: 3px solid var(--dark-color);
      padding: 30px;
      box-shadow: var(--card-shadow);
      text-align: center;
    }
    .qr-code-img {
      max-width: 180px;
      height: auto;
      border: 3px solid var(--dark-color);
      margin: 15px auto;
      display: block;
    }

    /* 页脚 */
    footer {
      background-color: var(--dark-color);
      color: #fff;
      padding: 60px 0 30px 0;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
      gap: 40px;
      margin-bottom: 40px;
    }
    .footer-col h4 {
      font-size: 1.2rem;
      color: var(--primary-yellow);
      margin-bottom: 20px;
      position: relative;
      display: inline-block;
    }
    .footer-col h4::after {
      content: "";
      position: absolute;
      bottom: -5px;
      left: 0;
      width: 100%;
      height: 3px;
      background: var(--primary-pink);
    }
    .footer-col ul {
      list-style: none;
    }
    .footer-col ul li {
      margin-bottom: 10px;
    }
    .footer-col ul li a {
      color: #ccc;
      text-decoration: none;
      transition: color 0.2s;
    }
    .footer-col ul li a:hover {
      color: #fff;
      text-decoration: underline;
    }
    .footer-bottom {
      border-top: 2px dashed #444;
      padding-top: 30px;
      text-align: center;
      color: #aaa;
    }
    .friend-links {
      margin-top: 20px;
      display: flex;
      flex-wrap: wrap;
      justify-content: center;
      gap: 15px;
    }
    .friend-links a {
      color: var(--primary-cyan);
      text-decoration: none;
      font-size: 0.9rem;
    }
    .friend-links a:hover {
      text-decoration: underline;
    }
    
    .ai-page-home-link {
      color: #fff !important;
      text-decoration: underline;
    }

    /* 浮动客服入口 */
    .float-kefu {
      position: fixed;
      right: 20px;
      bottom: 20px;
      z-index: 999;
      background-color: var(--primary-pink);
      border: 3px solid var(--dark-color);
      box-shadow: 4px 4px 0px var(--dark-color);
      padding: 15px;
      cursor: pointer;
      display: flex;
      align-items: center;
      gap: 10px;
      font-weight: bold;
      transition: all 0.2s ease;
    }
    .float-kefu:hover {
      transform: translate(-3px, -3px);
      box-shadow: 7px 7px 0px var(--dark-color);
    }
    .float-kefu-panel {
      position: absolute;
      bottom: 60px;
      right: 0;
      width: 220px;
      background: #fff;
      border: 3px solid var(--dark-color);
      box-shadow: var(--card-shadow);
      padding: 15px;
      display: none;
      text-align: center;
      color: var(--dark-color);
    }

    /* 响应式调整 */
    @media (max-width: 992px) {
      .stats-row {
        grid-template-columns: repeat(2, 1fr);
      }
      .flow-steps {
        grid-template-columns: repeat(2, 1fr);
      }
      .flow-steps .flow-step {
        margin-top: 30px;
      }
      .intro-grid {
        grid-template-columns: 1fr;
      }
    }

    @media (max-width: 768px) {
      .nav-menu {
        display: none;
        flex-direction: column;
        position: absolute;
        top: 80px;
        left: 0;
        right: 0;
        background: #fff;
        border-bottom: 4px solid var(--dark-color);
        padding: 20px;
        gap: 15px;
      }
      .nav-menu.active {
        display: flex;
      }
      .nav-toggle {
        display: flex;
      }
      .hero-h1 {
        font-size: 2rem;
        padding: 10px 15px;
      }
      .hero-subtitle {
        font-size: 1.1rem;
      }
      .flow-steps {
        grid-template-columns: 1fr;
      }
      .stats-row {
        grid-template-columns: 1fr;
      }
    }