:root {
      --bg-main: #faf8f5;
      --bg-card: #ffffff;
      --text-main: #1e1b18;
      --text-muted: #5e5953;
      --color-primary: #ff4757;
      --color-accent: #2ed573;
      --color-sun: #ffa502;
      --color-sky: #1e90ff;
      --color-purple: #9b59b6;
      --border-doodle: #2d3436;
      --shadow-doodle: 4px 4px 0px #2d3436;
      --shadow-doodle-lg: 6px 6px 0px #2d3436;
      --shadow-doodle-hover: 2px 2px 0px #2d3436;
      --radius-sm: 8px;
      --radius-md: 14px;
      --radius-lg: 20px;
      --radius-pill: 999px;
      --container-max: 1200px;
    }

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

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

    body {
      background-color: var(--bg-main);
      color: var(--text-main);
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      line-height: 1.6;
      overflow-x: hidden;
      background-image: radial-gradient(circle at 15px 15px, rgba(45, 52, 54, 0.05) 2px, transparent 0);
      background-size: 30px 30px;
    }

    a {
      color: inherit;
      text-decoration: none;
    }

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

    /* 顶部导航 */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(250, 248, 245, 0.95);
      backdrop-filter: blur(8px);
      border-bottom: 2px solid var(--border-doodle);
    }
    .header-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 72px;
    }
    .brand-box {
      display: flex;
      align-items: center;
      gap: 10px;
    }
    .brand-box .ai-page-logo {
      height: 38px;
      width: auto;
      display: block;
    }
    .brand-title {
      font-size: 1.25rem;
      font-weight: 800;
      letter-spacing: -0.5px;
      color: var(--text-main);
      background: var(--color-sun);
      padding: 2px 8px;
      border: 2px solid var(--border-doodle);
      border-radius: var(--radius-sm);
      box-shadow: 2px 2px 0 var(--border-doodle);
    }
    .nav-links {
      display: flex;
      align-items: center;
      gap: 0;
      list-style: none;
    }
    .nav-links li a {
      font-weight: 600;
      font-size: 0.95rem;
      padding: 8px 12px;
      border-radius: var(--radius-sm);
      transition: all 0.2s ease;
      display: inline-block;
    }
    .nav-links li a:hover {
      background: var(--color-sky);
      color: #ffffff;
      transform: translateY(-2px);
    }
    .header-actions {
      display: flex;
      align-items: center;
      gap: 12px;
    }
    .btn-doodle {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      padding: 10px 20px;
      border: 2px solid var(--border-doodle);
      border-radius: var(--radius-pill);
      box-shadow: var(--shadow-doodle);
      background: var(--color-primary);
      color: #fff;
      cursor: pointer;
      transition: all 0.15s ease;
      white-space: nowrap;
      font-size: 0.95rem;
    }
    .btn-doodle:hover {
      transform: translate(2px, 2px);
      box-shadow: var(--shadow-doodle-hover);
    }
    .btn-doodle-accent {
      background: var(--color-accent);
      color: var(--text-main);
    }
    .btn-doodle-sun {
      background: var(--color-sun);
      color: var(--text-main);
    }
    .btn-doodle-sky {
      background: var(--color-sky);
      color: #fff;
    }

    .mobile-menu-toggle {
      display: none;
      background: #fff;
      border: 2px solid var(--border-doodle);
      border-radius: var(--radius-sm);
      padding: 6px 10px;
      font-size: 1.2rem;
      cursor: pointer;
      box-shadow: 2px 2px 0 var(--border-doodle);
    }

    /* 首屏 Hero (无任何图片) */
    .hero-section {
      padding: 60px 0 40px;
      position: relative;
    }
    .hero-wrapper {
      display: grid;
      grid-template-columns: 1.2fr 0.8fr;
      gap: 30px;
      align-items: center;
    }
    .hero-badge {
      display: inline-block;
      background: var(--color-accent);
      color: var(--text-main);
      font-weight: 800;
      font-size: 0.85rem;
      padding: 4px 12px;
      border-radius: var(--radius-pill);
      border: 2px solid var(--border-doodle);
      box-shadow: 2px 2px 0 var(--border-doodle);
      margin-bottom: 16px;
      transform: rotate(-1.5deg);
    }
    .hero-title {
      font-size: 2.5rem;
      line-height: 1.25;
      font-weight: 900;
      margin-bottom: 20px;
      color: var(--text-main);
    }
    .hero-title .highlight-box {
      background: var(--color-sun);
      padding: 2px 10px;
      border-radius: 8px;
      border: 2px solid var(--border-doodle);
      box-shadow: 3px 3px 0 var(--border-doodle);
      display: inline-block;
      margin: 4px 0;
    }
    .hero-desc {
      font-size: 1.1rem;
      color: var(--text-muted);
      margin-bottom: 28px;
      line-height: 1.7;
    }
    .hero-btn-group {
      display: flex;
      flex-wrap: wrap;
      gap: 16px;
      margin-bottom: 30px;
    }
    .hero-btn-group .btn-doodle {
      font-size: 1.05rem;
      padding: 12px 28px;
    }
    .hero-stats-doodle {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 12px;
    }
    .stat-pill {
      background: #fff;
      border: 2px solid var(--border-doodle);
      border-radius: var(--radius-md);
      padding: 12px 14px;
      box-shadow: var(--shadow-doodle);
      text-align: center;
    }
    .stat-pill .num {
      font-size: 1.4rem;
      font-weight: 900;
      color: var(--color-primary);
      display: block;
    }
    .stat-pill .label {
      font-size: 0.8rem;
      color: var(--text-muted);
      font-weight: 600;
    }

    /* 首屏右侧创意矩阵面板 (纯代码绘制) */
    .hero-matrix-panel {
      background: #fff;
      border: 3px solid var(--border-doodle);
      border-radius: var(--radius-lg);
      box-shadow: var(--shadow-doodle-lg);
      padding: 24px;
      position: relative;
    }
    .panel-header-doodle {
      display: flex;
      align-items: center;
      justify-content: space-between;
      border-bottom: 2px dashed var(--border-doodle);
      padding-bottom: 12px;
      margin-bottom: 18px;
    }
    .dots-doodle {
      display: flex;
      gap: 6px;
    }
    .dot-circle {
      width: 12px;
      height: 12px;
      border-radius: 50%;
      border: 1.5px solid var(--border-doodle);
    }
    .dot-red { background: var(--color-primary); }
    .dot-yellow { background: var(--color-sun); }
    .dot-green { background: var(--color-accent); }
    .panel-tag {
      font-size: 0.75rem;
      font-weight: 800;
      background: var(--color-purple);
      color: #fff;
      padding: 2px 8px;
      border-radius: var(--radius-pill);
      border: 1px solid var(--border-doodle);
    }
    .matrix-chips {
      display: flex;
      flex-wrap: wrap;
      gap: 8px;
      margin-bottom: 16px;
    }
    .chip {
      font-size: 0.8rem;
      font-weight: 700;
      padding: 5px 10px;
      border: 2px solid var(--border-doodle);
      border-radius: var(--radius-sm);
      background: #fdfdfd;
      box-shadow: 2px 2px 0 var(--border-doodle);
    }
    .chip-hot { background: #ffeaa7; }
    .chip-blue { background: #dfe6e9; }
    .chip-green { background: #c8f7dc; }
    .panel-code-box {
      background: #2d3436;
      color: #55efc4;
      font-family: "Courier New", Courier, monospace;
      padding: 12px;
      border-radius: var(--radius-sm);
      font-size: 0.85rem;
      line-height: 1.5;
    }

    /* 通用Section */
    .section-padding {
      padding: 60px 0;
    }
    .section-header {
      text-align: center;
      max-width: 800px;
      margin: 0 auto 40px;
    }
    .section-badge {
      display: inline-block;
      font-size: 0.85rem;
      font-weight: 800;
      padding: 4px 14px;
      border: 2px solid var(--border-doodle);
      border-radius: var(--radius-pill);
      box-shadow: 2px 2px 0 var(--border-doodle);
      margin-bottom: 12px;
      background: var(--color-sun);
    }
    .section-title {
      font-size: 2rem;
      font-weight: 900;
      color: var(--text-main);
      margin-bottom: 12px;
    }
    .section-intro {
      font-size: 1rem;
      color: var(--text-muted);
    }

    /* 卡片网格 */
    .grid-3 {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .grid-4 {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
    }
    .grid-2 {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 24px;
    }

    .doodle-card {
      background: var(--bg-card);
      border: 2px solid var(--border-doodle);
      border-radius: var(--radius-md);
      box-shadow: var(--shadow-doodle);
      padding: 24px;
      transition: all 0.2s ease;
      display: flex;
      flex-direction: column;
    }
    .doodle-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-doodle-lg);
    }
    .card-icon-tag {
      font-size: 0.8rem;
      font-weight: 800;
      padding: 2px 10px;
      border: 2px solid var(--border-doodle);
      border-radius: var(--radius-pill);
      align-self: flex-start;
      margin-bottom: 14px;
      background: #f1f2f6;
    }
    .card-title {
      font-size: 1.2rem;
      font-weight: 800;
      margin-bottom: 10px;
      color: var(--text-main);
    }
    .card-desc {
      font-size: 0.92rem;
      color: var(--text-muted);
      line-height: 1.6;
      flex-grow: 1;
    }

    /* 平台介绍 / 关于我们 */
    .about-box {
      background: #ffffff;
      border: 3px solid var(--border-doodle);
      border-radius: var(--radius-lg);
      box-shadow: var(--shadow-doodle-lg);
      padding: 36px;
      margin-bottom: 30px;
    }
    .about-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 30px;
      align-items: center;
    }
    .about-list {
      list-style: none;
      margin-top: 18px;
    }
    .about-list li {
      position: relative;
      padding-left: 28px;
      margin-bottom: 12px;
      font-size: 0.95rem;
      font-weight: 600;
      color: var(--text-main);
    }
    .about-list li::before {
      content: "✦";
      position: absolute;
      left: 0;
      color: var(--color-primary);
      font-weight: 900;
      font-size: 1.1rem;
    }

    /* 流程步骤 */
    .flow-steps {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 18px;
      position: relative;
    }
    .step-item {
      background: #fff;
      border: 2px solid var(--border-doodle);
      border-radius: var(--radius-md);
      box-shadow: var(--shadow-doodle);
      padding: 20px;
      position: relative;
    }
    .step-num {
      width: 36px;
      height: 36px;
      background: var(--color-sun);
      border: 2px solid var(--border-doodle);
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 900;
      margin-bottom: 12px;
    }

    /* 对比评测专属样式 */
    .eval-card-main {
      background: #fff;
      border: 3px solid var(--border-doodle);
      border-radius: var(--radius-lg);
      box-shadow: var(--shadow-doodle-lg);
      padding: 30px;
      margin-bottom: 30px;
    }
    .eval-header-banner {
      display: flex;
      flex-wrap: wrap;
      justify-content: space-between;
      align-items: center;
      background: #fff8e7;
      border: 2px solid var(--border-doodle);
      border-radius: var(--radius-md);
      padding: 16px 24px;
      margin-bottom: 24px;
    }
    .eval-score-badge {
      font-size: 1.8rem;
      font-weight: 900;
      color: var(--color-primary);
    }
    .table-container {
      width: 100%;
      overflow-x: auto;
    }
    .doodle-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
    }
    .doodle-table th, .doodle-table td {
      border: 2px solid var(--border-doodle);
      padding: 14px 16px;
      font-size: 0.92rem;
    }
    .doodle-table th {
      background: #f1f2f6;
      font-weight: 800;
    }
    .doodle-table .highlight-col {
      background: #f0fdf4;
      font-weight: 700;
      color: #057a55;
    }

    /* 案例图片展示区 */
    .media-card-grid {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 24px;
    }
    .media-box {
      background: #fff;
      border: 2px solid var(--border-doodle);
      border-radius: var(--radius-md);
      box-shadow: var(--shadow-doodle);
      overflow: hidden;
      display: flex;
      flex-direction: column;
    }
    .media-img-wrap {
      width: 100%;
      overflow: hidden;
      border-bottom: 2px solid var(--border-doodle);
    }
    .media-img-wrap img {
      width: 100%;
      height: auto;
      display: block;
      transition: transform 0.3s ease;
    }
    .media-img-wrap img:hover {
      transform: scale(1.02);
    }
    .media-content {
      padding: 16px;
    }

    /* 用户评论 */
    .reviews-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 20px;
    }
    .review-card {
      background: #fff;
      border: 2px solid var(--border-doodle);
      border-radius: var(--radius-md);
      box-shadow: var(--shadow-doodle);
      padding: 20px;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }
    .review-user {
      display: flex;
      align-items: center;
      gap: 10px;
      margin-top: 14px;
      border-top: 1px dashed var(--border-doodle);
      padding-top: 10px;
    }
    .review-avatar {
      width: 36px;
      height: 36px;
      border-radius: 50%;
      background: var(--color-sun);
      border: 2px solid var(--border-doodle);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 800;
      font-size: 0.85rem;
    }
    .review-role {
      font-size: 0.8rem;
      color: var(--text-muted);
    }

    /* FAQ 折叠 */
    .faq-container {
      max-width: 900px;
      margin: 0 auto;
    }
    .faq-item {
      background: #fff;
      border: 2px solid var(--border-doodle);
      border-radius: var(--radius-md);
      box-shadow: var(--shadow-doodle);
      margin-bottom: 14px;
      overflow: hidden;
      transition: all 0.2s ease;
    }
    .faq-question {
      padding: 16px 20px;
      font-weight: 800;
      font-size: 1rem;
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      background: #ffffff;
      user-select: none;
    }
    .faq-question:hover {
      background: #fafafa;
    }
    .faq-icon {
      font-weight: 900;
      font-size: 1.2rem;
      transition: transform 0.2s ease;
    }
    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s ease, padding 0.3s ease;
      background: #fdfdfd;
      padding: 0 20px;
      font-size: 0.92rem;
      color: var(--text-muted);
      border-top: 1px dashed transparent;
    }
    .faq-item.active .faq-answer {
      max-height: 250px;
      padding: 14px 20px 18px;
      border-top-color: var(--border-doodle);
    }
    .faq-item.active .faq-icon {
      transform: rotate(45deg);
      color: var(--color-primary);
    }

    /* 需求表单与联系我们 */
    .contact-wrapper {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 30px;
    }
    .contact-info-panel {
      background: #fff;
      border: 3px solid var(--border-doodle);
      border-radius: var(--radius-lg);
      box-shadow: var(--shadow-doodle-lg);
      padding: 30px;
    }
    .contact-item {
      margin-bottom: 16px;
      font-size: 0.95rem;
    }
    .contact-item strong {
      display: inline-block;
      min-width: 90px;
    }
    .qr-box {
      margin-top: 20px;
      padding: 16px;
      background: #fdfae7;
      border: 2px dashed var(--border-doodle);
      border-radius: var(--radius-md);
      display: inline-block;
      text-align: center;
    }
    .qr-box img {
      max-width: 140px;
      height: auto;
      display: block;
      margin: 0 auto 8px;
      border: 2px solid var(--border-doodle);
      border-radius: 8px;
    }
    .form-panel {
      background: #fff;
      border: 3px solid var(--border-doodle);
      border-radius: var(--radius-lg);
      box-shadow: var(--shadow-doodle-lg);
      padding: 30px;
    }
    .form-group {
      margin-bottom: 16px;
    }
    .form-group label {
      display: block;
      font-weight: 700;
      margin-bottom: 6px;
      font-size: 0.9rem;
    }
    .form-control {
      width: 100%;
      padding: 10px 14px;
      border: 2px solid var(--border-doodle);
      border-radius: var(--radius-sm);
      font-size: 0.92rem;
      background: #fafafa;
      font-family: inherit;
    }
    .form-control:focus {
      outline: none;
      background: #fff;
      border-color: var(--color-sky);
      box-shadow: 2px 2px 0 var(--border-doodle);
    }
    textarea.form-control {
      resize: vertical;
      min-height: 90px;
    }

    /* 资讯与外链列表 */
    .articles-links-box {
      background: #fff;
      border: 2px solid var(--border-doodle);
      border-radius: var(--radius-md);
      box-shadow: var(--shadow-doodle);
      padding: 24px;
      margin-top: 20px;
    }
    .links-tags-wrap {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      margin-top: 12px;
    }
    .links-tags-wrap a {
      background: #f1f2f6;
      border: 2px solid var(--border-doodle);
      padding: 6px 14px;
      border-radius: var(--radius-pill);
      font-size: 0.85rem;
      font-weight: 700;
      box-shadow: 2px 2px 0 var(--border-doodle);
      transition: all 0.15s ease;
    }
    .links-tags-wrap a:hover {
      background: var(--color-sun);
      transform: translate(-1px, -1px);
    }

    /* 页脚 */
    .site-footer {
      background: #ffffff;
      border-top: 3px solid var(--border-doodle);
      padding: 40px 0 30px;
      margin-top: 60px;
    }
    .footer-bottom {
      text-align: center;
      padding-top: 20px;
      border-top: 2px dashed var(--border-doodle);
      font-size: 0.85rem;
      color: var(--text-muted);
      margin-top: 24px;
    }

    /* 浮动客服 */
    .floating-widget {
      position: fixed;
      right: 20px;
      bottom: 30px;
      z-index: 999;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }
    .floating-btn {
      width: 48px;
      height: 48px;
      border-radius: 50%;
      background: var(--color-sun);
      border: 2px solid var(--border-doodle);
      box-shadow: var(--shadow-doodle);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 900;
      font-size: 1.1rem;
      cursor: pointer;
      transition: all 0.15s ease;
    }
    .floating-btn:hover {
      transform: translate(2px, 2px);
      box-shadow: var(--shadow-doodle-hover);
    }

    /* 响应式调整 */
    @media (max-width: 992px) {
      .hero-wrapper, .about-grid, .contact-wrapper {
        grid-template-columns: 1fr;
      }
      .grid-3, .grid-4, .reviews-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .flow-steps {
        grid-template-columns: repeat(2, 1fr);
      }
    }
    @media (max-width: 768px) {
      .nav-links {
        display: none;
        flex-direction: column;
        position: absolute;
        top: 72px;
        left: 0;
        width: 100%;
        background: #fff;
        border-bottom: 2px solid var(--border-doodle);
        padding: 16px;
      }
      .nav-links.active {
        display: flex;
      }
      .mobile-menu-toggle {
        display: block;
      }
      .grid-3, .grid-4, .grid-2, .reviews-grid, .media-card-grid, .flow-steps {
        grid-template-columns: 1fr;
      }
      .hero-title {
        font-size: 1.8rem;
      }
      .hero-stats-doodle {
        grid-template-columns: 1fr;
      }
    }