/* 多彩涂鸦风格 CSS (Neo-brutalism / Brutalist Style) */
    :root {
      --bg-color: #FAF8F5;
      --text-color: #1A1A1A;
      --border-color: #1A1A1A;
      --border-width: 3px;
      --card-shadow: 6px 6px 0px #1A1A1A;
      --button-shadow: 4px 4px 0px #1A1A1A;
      
      /* 涂鸦撞色 */
      --color-yellow: #FFE066;
      --color-blue: #339AF0;
      --color-pink: #FF8787;
      --color-green: #51CF66;
      --color-purple: #B197FC;
      --color-orange: #FF922B;
    }

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

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

    /* 容器规范 */
    .container {
      width: 100%;
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 20px;
    }

    /* 粗边框与卡片基础样式 */
    .brutalist-border {
      border: var(--border-width) solid var(--border-color);
      background-color: #FFFFFF;
      box-shadow: var(--card-shadow);
      border-radius: 8px;
    }

    /* 涂鸦风按钮 */
    .btn-brutalist {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 12px 24px;
      font-weight: 800;
      text-decoration: none;
      color: var(--text-color);
      background-color: var(--color-yellow);
      border: var(--border-width) solid var(--border-color);
      box-shadow: var(--button-shadow);
      border-radius: 8px;
      cursor: pointer;
      transition: all 0.15s ease;
    }

    .btn-brutalist:hover {
      transform: translate(2px, 2px);
      box-shadow: 2px 2px 0px var(--border-color);
    }

    .btn-brutalist:active {
      transform: translate(4px, 4px);
      box-shadow: 0px 0px 0px var(--border-color);
    }

    .btn-blue { background-color: var(--color-blue); color: #FFF; }
    .btn-pink { background-color: var(--color-pink); }
    .btn-green { background-color: var(--color-green); }
    .btn-purple { background-color: var(--color-purple); }

    /* 顶部导航 */
    header {
      background-color: #FFFFFF;
      border-bottom: var(--border-width) solid var(--border-color);
      position: sticky;
      top: 0;
      z-index: 100;
    }

    .nav-container {
      display: flex;
      justify-content: space-between;
      align-items: center;
      height: 70px;
    }

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

    .ai-page-logo {
      height: 40px;
      width: auto;
    }

    .brand-name {
      font-size: 1.5rem;
      font-weight: 900;
      color: var(--text-color);
      text-decoration: none;
    }

    .nav-menu {
      display: flex;
      gap: 20px;
      align-items: center;
    }

    .nav-link {
      text-decoration: none;
      color: var(--text-color);
      font-weight: 700;
      font-size: 0.95rem;
      padding: 6px 12px;
      border-radius: 6px;
      transition: background-color 0.2s;
    }

    .nav-link:hover {
      background-color: var(--color-yellow);
    }

    /* 移动端菜单按钮 */
    .menu-toggle {
      display: none;
      background: none;
      border: var(--border-width) solid var(--border-color);
      padding: 8px;
      cursor: pointer;
      font-size: 1.2rem;
      font-weight: bold;
      background-color: var(--color-yellow);
      border-radius: 6px;
    }

    /* Hero首屏：必须没有图片 */
    #hero {
      padding: 80px 0;
      background-color: #FFFDF9;
      border-bottom: var(--border-width) solid var(--border-color);
      position: relative;
    }

    /* 涂鸦感斑斓背景块装饰，通过纯CSS实现，不能使用背景图 */
    #hero::before {
      content: '';
      position: absolute;
      width: 250px;
      height: 250px;
      background-color: var(--color-blue);
      border-radius: 50%;
      top: 10%;
      left: -50px;
      opacity: 0.15;
      z-index: 1;
      filter: blur(40px);
    }
    #hero::after {
      content: '';
      position: absolute;
      width: 300px;
      height: 300px;
      background-color: var(--color-pink);
      border-radius: 40%;
      bottom: 5%;
      right: -50px;
      opacity: 0.15;
      z-index: 1;
      filter: blur(50px);
    }

    .hero-content {
      position: relative;
      z-index: 2;
      max-width: 850px;
      margin: 0 auto;
      text-align: center;
    }

    .hero-tag {
      display: inline-block;
      padding: 6px 14px;
      font-weight: 800;
      text-transform: uppercase;
      background-color: var(--color-pink);
      border: 2px solid var(--border-color);
      transform: rotate(-2deg);
      margin-bottom: 25px;
      font-size: 0.9rem;
    }

    h1.hero-title {
      font-size: 2.8rem;
      font-weight: 900;
      line-height: 1.2;
      margin-bottom: 25px;
      letter-spacing: -1px;
    }

    h1.hero-title span {
      background-color: var(--color-yellow);
      padding: 2px 8px;
      border: 3px solid var(--border-color);
      display: inline-block;
      transform: rotate(1deg);
    }

    .hero-desc {
      font-size: 1.2rem;
      margin-bottom: 35px;
      color: #4A4A4A;
      font-weight: 500;
    }

    .hero-actions {
      display: flex;
      gap: 20px;
      justify-content: center;
      flex-wrap: wrap;
    }

    /* 模块通用样式 */
    section {
      padding: 70px 0;
      border-bottom: var(--border-width) solid var(--border-color);
    }

    .section-title {
      font-size: 2.2rem;
      font-weight: 900;
      text-align: center;
      margin-bottom: 15px;
      position: relative;
      display: inline-block;
      left: 50%;
      transform: translateX(-50%);
    }

    .section-title::after {
      content: '';
      display: block;
      width: 100%;
      height: 12px;
      background-color: var(--color-green);
      position: absolute;
      bottom: 2px;
      left: 0;
      z-index: -1;
      transform: skewX(-15deg);
    }

    .section-subtitle {
      text-align: center;
      font-size: 1.1rem;
      color: #666;
      margin-bottom: 45px;
      font-weight: 500;
    }

    /* 数据指标 */
    .stats-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
      gap: 25px;
      margin-top: 40px;
    }

    .stat-card {
      padding: 30px 20px;
      text-align: center;
    }

    .stat-card:nth-child(1) { background-color: #FFF3CD; }
    .stat-card:nth-child(2) { background-color: #D1E7DD; }
    .stat-card:nth-child(3) { background-color: #CFF4FC; }
    .stat-card:nth-child(4) { background-color: #F8D7DA; }

    .stat-num {
      font-size: 3rem;
      font-weight: 900;
      margin-bottom: 10px;
      display: block;
    }

    .stat-label {
      font-size: 1rem;
      font-weight: 700;
      color: #444;
    }

    /* 卡片网格 */
    .card-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
      gap: 30px;
    }

    .brutalist-card {
      padding: 25px;
      background-color: #FFFFFF;
      transition: transform 0.2s;
    }

    .brutalist-card:hover {
      transform: translate(-4px, -4px);
      box-shadow: 10px 10px 0px var(--border-color);
    }

    .card-icon {
      width: 50px;
      height: 50px;
      border: 2px solid var(--border-color);
      border-radius: 8px;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 900;
      font-size: 1.5rem;
      margin-bottom: 20px;
    }

    .card-title {
      font-size: 1.3rem;
      font-weight: 900;
      margin-bottom: 12px;
    }

    /* 模型展示：标签云 */
    .tag-cloud {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
      justify-content: center;
      margin-top: 30px;
    }

    .brutalist-tag {
      padding: 8px 16px;
      border: 2px solid var(--border-color);
      border-radius: 6px;
      font-weight: 800;
      font-size: 0.95rem;
      box-shadow: 2px 2px 0px var(--border-color);
      transition: transform 0.1s;
    }

    .brutalist-tag:hover {
      transform: translateY(-2px);
      box-shadow: 4px 4px 0px var(--border-color);
    }

    /* 一站式AIGC制作与图片素材区域 */
    .showcase-grid {
      display: grid;
      grid-template-columns: 1fr 1.2fr;
      gap: 40px;
      align-items: center;
    }

    .showcase-text {
      padding-right: 20px;
    }

    .showcase-images {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 20px;
    }

    .showcase-img-box {
      border: var(--border-width) solid var(--border-color);
      box-shadow: var(--card-shadow);
      border-radius: 8px;
      overflow: hidden;
      aspect-ratio: 4/3;
    }

    .showcase-img-box img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      display: block;
    }

    .showcase-img-box.tall {
      grid-row: span 2;
      aspect-ratio: auto;
      height: 100%;
    }

    /* 流程步骤 */
    .process-timeline {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
      gap: 25px;
      position: relative;
    }

    .process-step {
      padding: 25px;
      background-color: #FFFFFF;
      position: relative;
    }

    .step-badge {
      position: absolute;
      top: -15px;
      left: 20px;
      background-color: var(--color-orange);
      border: 2px solid var(--border-color);
      padding: 2px 10px;
      font-weight: 900;
      font-size: 0.85rem;
      border-radius: 4px;
    }

    /* 对比评测表格 */
    .table-container {
      overflow-x: auto;
      margin-top: 30px;
    }

    .brutalist-table {
      width: 100%;
      border-collapse: collapse;
      background-color: #FFFFFF;
      border: var(--border-width) solid var(--border-color);
      text-align: left;
    }

    .brutalist-table th, .brutalist-table td {
      border: 2px solid var(--border-color);
      padding: 15px 20px;
      font-weight: 700;
    }

    .brutalist-table th {
      background-color: var(--color-blue);
      color: #FFFFFF;
    }

    .brutalist-table tr:nth-child(even) {
      background-color: #F8F9FA;
    }

    .rating-badge {
      background-color: var(--color-pink);
      padding: 4px 10px;
      border: 2px solid var(--border-color);
      font-weight: 900;
      border-radius: 4px;
      display: inline-block;
    }

    /* 需求表单 */
    .form-wrapper {
      max-width: 650px;
      margin: 0 auto;
      padding: 40px;
      background-color: #FFFFFF;
    }

    .form-group {
      margin-bottom: 22px;
    }

    .form-group label {
      display: block;
      font-weight: 800;
      margin-bottom: 8px;
    }

    .form-control {
      width: 100%;
      padding: 12px;
      border: var(--border-width) solid var(--border-color);
      border-radius: 6px;
      font-size: 1rem;
      font-weight: 600;
      background-color: #FCFCFA;
      transition: border-color 0.2s;
    }

    .form-control:focus {
      outline: none;
      border-color: var(--color-blue);
      background-color: #FFF;
    }

    /* FAQ折叠面板 */
    .faq-item {
      margin-bottom: 15px;
      background-color: #FFFFFF;
    }

    .faq-question {
      padding: 20px;
      font-weight: 800;
      font-size: 1.1rem;
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      user-select: none;
    }

    .faq-question::after {
      content: '+';
      font-size: 1.5rem;
      font-weight: 900;
      transition: transform 0.2s;
    }

    .faq-item.active .faq-question::after {
      content: '−';
    }

    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.2s ease-out;
      border-top: 0px solid var(--border-color);
      background-color: #FFFDF9;
    }

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

    /* 用户评论 */
    .testimonial-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
      gap: 30px;
    }

    .testimonial-card {
      padding: 25px;
      background-color: #FFFFFF;
    }

    .user-info {
      display: flex;
      align-items: center;
      gap: 15px;
      margin-bottom: 15px;
    }

    .user-avatar-placeholder {
      width: 48px;
      height: 48px;
      border-radius: 50%;
      border: 2px solid var(--border-color);
      background-color: var(--color-purple);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 900;
      color: #FFF;
    }

    .user-details h4 {
      font-size: 1rem;
      font-weight: 800;
    }

    .user-details span {
      font-size: 0.85rem;
      color: #666;
    }

    /* 术语与百科 */
    .wiki-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
      gap: 25px;
    }

    /* 文章列表 & 友情链接 */
    .footer-links-grid {
      display: grid;
      grid-template-columns: 1.5fr 1fr;
      gap: 40px;
      margin-top: 40px;
    }

    .article-list {
      list-style: none;
    }

    .article-item {
      margin-bottom: 15px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      border-bottom: 2px dashed #DDD;
      padding-bottom: 10px;
    }

    .article-item a {
      color: var(--text-color);
      font-weight: 700;
      text-decoration: none;
    }

    .article-item a:hover {
      color: var(--color-blue);
    }

    .friend-links {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      align-content: flex-start;
    }

    .friend-links a {
      padding: 6px 12px;
      border: 2px solid var(--border-color);
      border-radius: 4px;
      color: var(--text-color);
      text-decoration: none;
      font-weight: 700;
      background-color: #FFFFFF;
    }

    .friend-links a:hover {
      background-color: var(--color-green);
    }

    /* 页脚 */
    footer {
      background-color: #1A1A1A;
      color: #FFFFFF;
      padding: 50px 0;
      border-top: var(--border-width) solid var(--border-color);
    }

    .footer-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
      gap: 40px;
      margin-bottom: 40px;
    }

    .footer-title {
      font-size: 1.2rem;
      font-weight: 900;
      margin-bottom: 20px;
      color: var(--color-yellow);
    }

    .footer-desc {
      color: #BBB;
      margin-bottom: 20px;
    }

    .contact-info-list {
      list-style: none;
    }

    .contact-info-list li {
      margin-bottom: 12px;
      color: #DDD;
      font-weight: 600;
    }

    .footer-bottom {
      border-top: 1px solid #333;
      padding-top: 30px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      flex-wrap: wrap;
      gap: 20px;
      color: #888;
      font-size: 0.9rem;
      font-weight: 600;
    }

    /* 客服悬浮球 */
    .float-kefu {
      position: fixed;
      bottom: 30px;
      right: 30px;
      z-index: 99;
      cursor: pointer;
    }

    .float-btn {
      width: 60px;
      height: 60px;
      border-radius: 50%;
      background-color: var(--color-pink);
      border: var(--border-width) solid var(--border-color);
      box-shadow: 4px 4px 0px var(--border-color);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 900;
      font-size: 1.5rem;
      transition: all 0.2s;
    }

    .float-btn:hover {
      transform: scale(1.05);
    }

    .float-popup {
      position: absolute;
      bottom: 75px;
      right: 0;
      width: 200px;
      padding: 15px;
      background-color: #FFFFFF;
      border: var(--border-width) solid var(--border-color);
      box-shadow: var(--card-shadow);
      border-radius: 8px;
      display: none;
      text-align: center;
    }

    .float-popup img {
      width: 100%;
      height: auto;
      border: 2px solid var(--border-color);
      margin-bottom: 10px;
    }

    .float-popup p {
      font-size: 0.85rem;
      font-weight: 800;
      color: var(--text-color);
    }

    /* 响应式媒体查询 */
    @media (max-width: 992px) {
      .showcase-grid {
        grid-template-columns: 1fr;
      }
      .footer-links-grid {
        grid-template-columns: 1fr;
      }
    }

    @media (max-width: 768px) {
      h1.hero-title {
        font-size: 2.2rem;
      }
      .nav-menu {
        display: none;
        position: absolute;
        top: 70px;
        left: 0;
        right: 0;
        background-color: #FFFFFF;
        border-bottom: var(--border-width) solid var(--border-color);
        padding: 20px;
        flex-direction: column;
        align-items: stretch;
      }
      .nav-menu.active {
        display: flex;
      }
      .menu-toggle {
        display: block;
      }
    }