:root {
      --primary-color: #2b3990;
      --accent-yellow: #ffd000;
      --accent-pink: #ff3366;
      --accent-teal: #00d2be;
      --accent-purple: #7928ca;
      --bg-warm: #faf9f6;
      --card-bg: #ffffff;
      --text-main: #1d2129;
      --text-muted: #596375;
      --border-dark: #1e2022;
      --shadow-brutal: 4px 4px 0px #1e2022;
      --shadow-brutal-lg: 6px 6px 0px #1e2022;
      --shadow-brutal-hover: 2px 2px 0px #1e2022;
      --radius-md: 12px;
      --radius-sm: 8px;
    }

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

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

    body {
      background-color: var(--bg-warm);
      background-image: 
        radial-gradient(circle at 10% 20%, rgba(255, 208, 0, 0.08) 0%, transparent 20%),
        radial-gradient(circle at 90% 80%, rgba(255, 51, 102, 0.06) 0%, transparent 25%),
        radial-gradient(circle at 50% 50%, rgba(0, 210, 190, 0.05) 0%, transparent 30%);
      color: var(--text-main);
      font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      line-height: 1.6;
      position: relative;
    }

    .container {
      width: 100%;
      max-width: 1200px;
      margin-left: auto;
      margin-right: auto;
      padding-left: 24px;
      padding-right: 24px;
    }

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

    /* 顶部导航 */
    header.site-header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(250, 249, 246, 0.96);
      backdrop-filter: blur(8px);
      border-bottom: 2px solid var(--border-dark);
    }

    .header-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 76px;
    }

    .brand-group {
      display: flex;
      align-items: center;
      gap: 16px;
    }

    .logo-wrap {
      display: inline-flex;
      align-items: center;
      max-height: 48px;
    }

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

    .ai-page-home-link {
      font-weight: 700;
      padding: 4px 12px;
      background: var(--accent-yellow);
      border: 2px solid var(--border-dark);
      border-radius: var(--radius-sm);
      box-shadow: var(--shadow-brutal-hover);
      transition: all 0.2s ease;
    }
    .ai-page-home-link:hover {
      transform: translate(-1px, -1px);
      box-shadow: var(--shadow-brutal);
    }

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

    .nav-links a {
      font-size: 0.95rem;
      font-weight: 600;
      padding: 8px 12px;
      border-radius: var(--radius-sm);
      transition: background 0.2s ease;
      white-space: nowrap;
    }

    .nav-links a:hover {
      background: #eee8d5;
    }

    .header-cta-btn {
      display: inline-block;
      padding: 10px 18px;
      background: var(--accent-pink);
      color: #fff;
      font-weight: 700;
      border: 2px solid var(--border-dark);
      border-radius: var(--radius-sm);
      box-shadow: var(--shadow-brutal);
      transition: all 0.2s;
    }
    .header-cta-btn:hover {
      transform: translate(1px, 1px);
      box-shadow: var(--shadow-brutal-hover);
    }

    .mobile-menu-toggle {
      display: none;
      background: none;
      border: 2px solid var(--border-dark);
      padding: 6px 10px;
      font-size: 1.2rem;
      border-radius: var(--radius-sm);
      cursor: pointer;
      font-weight: 900;
    }

    /* 涂鸦风徽章与标题 */
    .section-head {
      text-align: center;
      margin-bottom: 48px;
      position: relative;
    }

    .section-badge {
      display: inline-block;
      padding: 4px 14px;
      background: var(--accent-teal);
      border: 2px solid var(--border-dark);
      border-radius: 20px;
      font-size: 0.85rem;
      font-weight: 800;
      box-shadow: 2px 2px 0 var(--border-dark);
      margin-bottom: 12px;
      text-transform: uppercase;
    }

    .section-title {
      font-size: 2.2rem;
      font-weight: 900;
      color: var(--text-main);
      letter-spacing: -0.5px;
      position: relative;
      display: inline-block;
    }

    .section-title::after {
      content: "";
      position: absolute;
      left: 10%;
      bottom: -4px;
      width: 80%;
      height: 6px;
      background: var(--accent-yellow);
      z-index: -1;
      border-radius: 4px;
      transform: rotate(-1deg);
    }

    .section-desc {
      margin-top: 14px;
      color: var(--text-muted);
      font-size: 1.05rem;
      max-width: 680px;
      margin-left: auto;
      margin-right: auto;
    }

    /* Section 通用 */
    section {
      padding: 70px 0;
      border-bottom: 2px dashed rgba(30, 32, 34, 0.15);
    }

    /* Hero 首屏 (严禁图片) */
    .hero-section {
      padding: 90px 0 80px;
      background: #fffcee;
      background-image: radial-gradient(var(--border-dark) 1px, transparent 1px);
      background-size: 28px 28px;
      position: relative;
      border-bottom: 3px solid var(--border-dark);
    }

    .hero-wrap {
      text-align: center;
      max-width: 900px;
      margin: 0 auto;
    }

    .hero-pill {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      background: #ffffff;
      padding: 6px 16px;
      border: 2px solid var(--border-dark);
      border-radius: 30px;
      font-weight: 700;
      font-size: 0.9rem;
      box-shadow: var(--shadow-brutal-hover);
      margin-bottom: 24px;
    }

    .hero-pill-dot {
      width: 10px;
      height: 10px;
      background: var(--accent-pink);
      border-radius: 50%;
      display: inline-block;
      animation: pulse 1.5s infinite;
    }

    @keyframes pulse {
      0% { transform: scale(0.9); opacity: 0.7; }
      50% { transform: scale(1.3); opacity: 1; }
      100% { transform: scale(0.9); opacity: 0.7; }
    }

    h1.hero-main-title {
      font-size: 3rem;
      font-weight: 900;
      line-height: 1.25;
      color: var(--text-main);
      margin-bottom: 24px;
      letter-spacing: -1px;
    }

    .hero-highlight {
      background: linear-gradient(120deg, rgba(255, 51, 102, 0.2) 0%, rgba(255, 208, 0, 0.6) 100%);
      padding: 0 8px;
      border-radius: 6px;
      border-bottom: 3px solid var(--accent-pink);
      display: inline-block;
    }

    .hero-subtext {
      font-size: 1.2rem;
      color: var(--text-muted);
      line-height: 1.7;
      margin-bottom: 36px;
      max-width: 780px;
      margin-left: auto;
      margin-right: auto;
    }

    .hero-btn-group {
      display: flex;
      justify-content: center;
      gap: 18px;
      flex-wrap: wrap;
      margin-bottom: 40px;
    }

    .btn-hero-main {
      font-size: 1.1rem;
      font-weight: 800;
      background: var(--accent-yellow);
      color: var(--text-main);
      padding: 16px 36px;
      border: 3px solid var(--border-dark);
      border-radius: var(--radius-md);
      box-shadow: var(--shadow-brutal-lg);
      transition: all 0.2s;
    }

    .btn-hero-main:hover {
      transform: translate(2px, 2px);
      box-shadow: var(--shadow-brutal);
      background: #ffdb2a;
    }

    .btn-hero-sub {
      font-size: 1.1rem;
      font-weight: 800;
      background: #ffffff;
      color: var(--text-main);
      padding: 16px 32px;
      border: 3px solid var(--border-dark);
      border-radius: var(--radius-md);
      box-shadow: var(--shadow-brutal-lg);
      transition: all 0.2s;
    }

    .btn-hero-sub:hover {
      transform: translate(2px, 2px);
      box-shadow: var(--shadow-brutal);
      background: #f7f7f7;
    }

    /* 涂鸦风格模型标签流 */
    .model-tags-box {
      background: #ffffff;
      border: 3px solid var(--border-dark);
      border-radius: var(--radius-md);
      padding: 20px 24px;
      box-shadow: var(--shadow-brutal);
      text-align: left;
    }

    .model-tags-box p {
      font-size: 0.88rem;
      font-weight: 800;
      color: var(--text-main);
      margin-bottom: 12px;
      display: flex;
      align-items: center;
      gap: 6px;
    }

    .model-badge-cloud {
      display: flex;
      flex-wrap: wrap;
      gap: 8px;
    }

    .model-chip {
      display: inline-block;
      background: #f4f5f7;
      border: 1.5px solid var(--border-dark);
      padding: 3px 10px;
      border-radius: 6px;
      font-size: 0.8rem;
      font-weight: 700;
      color: #333;
      transition: all 0.15s;
    }

    .model-chip:hover {
      background: var(--accent-teal);
      transform: translateY(-2px);
    }

    /* 数据指标卡片 */
    .metrics-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      margin-top: -30px;
      position: relative;
      z-index: 10;
    }

    .metric-card {
      background: #ffffff;
      border: 3px solid var(--border-dark);
      border-radius: var(--radius-md);
      padding: 24px 20px;
      box-shadow: var(--shadow-brutal);
      text-align: center;
    }

    .metric-value {
      font-size: 2.2rem;
      font-weight: 900;
      color: var(--primary-color);
      line-height: 1.2;
    }

    .metric-label {
      font-size: 0.95rem;
      font-weight: 700;
      color: var(--text-muted);
      margin-top: 6px;
    }

    /* 关于我们 / 平台介绍 */
    .about-box {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 36px;
      align-items: center;
    }

    .about-card-brutal {
      background: #ffffff;
      border: 3px solid var(--border-dark);
      border-radius: var(--radius-md);
      padding: 32px;
      box-shadow: var(--shadow-brutal-lg);
    }

    .about-list {
      list-style: none;
      display: grid;
      gap: 14px;
      margin-top: 20px;
    }

    .about-list li {
      position: relative;
      padding-left: 28px;
      font-size: 1rem;
      font-weight: 600;
    }

    .about-list li::before {
      content: "✦";
      position: absolute;
      left: 0;
      color: var(--accent-pink);
      font-size: 1.1rem;
    }

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

    .feature-card {
      background: #ffffff;
      border: 3px solid var(--border-dark);
      border-radius: var(--radius-md);
      padding: 26px;
      box-shadow: var(--shadow-brutal);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
      transition: transform 0.2s ease, box-shadow 0.2s ease;
    }

    .feature-card:hover {
      transform: translate(-3px, -3px);
      box-shadow: var(--shadow-brutal-lg);
    }

    .feature-tag {
      align-self: flex-start;
      font-size: 0.75rem;
      font-weight: 800;
      padding: 3px 8px;
      background: #eff2f6;
      border: 1.5px solid var(--border-dark);
      border-radius: 4px;
      margin-bottom: 12px;
    }

    .feature-card h3 {
      font-size: 1.25rem;
      font-weight: 800;
      margin-bottom: 10px;
      color: var(--text-main);
    }

    .feature-card p {
      font-size: 0.92rem;
      color: var(--text-muted);
      line-height: 1.55;
    }

    /* 案例展示区带图 */
    .case-grid {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 28px;
    }

    .case-card {
      background: #ffffff;
      border: 3px solid var(--border-dark);
      border-radius: var(--radius-md);
      overflow: hidden;
      box-shadow: var(--shadow-brutal);
    }

    .case-img-wrap {
      width: 100%;
      background: #eee;
      border-bottom: 3px solid var(--border-dark);
      overflow: hidden;
    }

    .case-img-wrap img {
      width: 100%;
      max-width: 100%;
      height: auto;
      display: block;
      transition: transform 0.3s ease;
      object-fit: cover;
    }

    .case-card:hover .case-img-wrap img {
      transform: scale(1.03);
    }

    .case-body {
      padding: 22px;
    }

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

    .case-body p {
      font-size: 0.9rem;
      color: var(--text-muted);
    }

    /* 流程步骤 */
    .process-steps {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 18px;
    }

    .step-box {
      background: #ffffff;
      border: 3px solid var(--border-dark);
      border-radius: var(--radius-md);
      padding: 22px;
      box-shadow: var(--shadow-brutal);
      position: relative;
    }

    .step-num {
      width: 36px;
      height: 36px;
      background: var(--accent-yellow);
      border: 2px solid var(--border-dark);
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 900;
      margin-bottom: 14px;
    }

    .step-box h4 {
      font-size: 1.1rem;
      font-weight: 800;
      margin-bottom: 8px;
    }

    .step-box p {
      font-size: 0.88rem;
      color: var(--text-muted);
    }

    /* 对比评测表格板块 */
    .compare-container {
      background: #ffffff;
      border: 3px solid var(--border-dark);
      border-radius: var(--radius-md);
      padding: 32px;
      box-shadow: var(--shadow-brutal-lg);
    }

    .score-banner {
      display: flex;
      justify-content: space-between;
      align-items: center;
      background: #fff8d6;
      border: 2px solid var(--border-dark);
      border-radius: var(--radius-sm);
      padding: 18px 24px;
      margin-bottom: 28px;
      flex-wrap: wrap;
      gap: 16px;
    }

    .score-title {
      font-size: 1.15rem;
      font-weight: 800;
    }

    .score-badge {
      display: flex;
      align-items: center;
      gap: 12px;
      font-size: 1.1rem;
      font-weight: 900;
    }

    .score-star {
      color: #ff9900;
      letter-spacing: 2px;
    }

    .score-point {
      background: var(--accent-pink);
      color: #ffffff;
      padding: 4px 12px;
      border: 2px solid var(--border-dark);
      border-radius: 20px;
    }

    .table-scroll {
      overflow-x: auto;
      width: 100%;
    }

    .table-scroll table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
      min-width: 620px;
    }

    .table-scroll th, .table-scroll td {
      border: 2px solid var(--border-dark);
      padding: 14px 18px;
      font-size: 0.95rem;
    }

    .table-scroll th {
      background: #f0f3f6;
      font-weight: 800;
    }

    .table-scroll td.col-highlight {
      background: #effbf8;
      font-weight: 700;
      color: var(--primary-color);
    }

    /* 需求匹配与表单 */
    .form-wrapper {
      background: #ffffff;
      border: 3px solid var(--border-dark);
      border-radius: var(--radius-md);
      padding: 36px;
      box-shadow: var(--shadow-brutal-lg);
      max-width: 760px;
      margin: 0 auto;
    }

    .form-row {
      margin-bottom: 20px;
    }

    .form-row label {
      display: block;
      font-weight: 800;
      margin-bottom: 8px;
      font-size: 0.95rem;
    }

    .form-control {
      width: 100%;
      padding: 12px 14px;
      border: 2px solid var(--border-dark);
      border-radius: var(--radius-sm);
      font-size: 0.95rem;
      outline: none;
      background: #fafafa;
      font-family: inherit;
    }

    .form-control:focus {
      border-color: var(--primary-color);
      background: #ffffff;
    }

    .btn-submit {
      width: 100%;
      padding: 16px;
      background: var(--accent-yellow);
      border: 3px solid var(--border-dark);
      border-radius: var(--radius-sm);
      font-size: 1.1rem;
      font-weight: 900;
      cursor: pointer;
      box-shadow: var(--shadow-brutal);
      transition: all 0.2s;
    }

    .btn-submit:hover {
      transform: translate(2px, 2px);
      box-shadow: var(--shadow-brutal-hover);
      background: #ffdb2a;
    }

    /* FAQ 折叠 */
    .faq-list {
      max-width: 860px;
      margin: 0 auto;
      display: grid;
      gap: 14px;
    }

    .faq-item {
      background: #ffffff;
      border: 2px solid var(--border-dark);
      border-radius: var(--radius-sm);
      box-shadow: var(--shadow-brutal-hover);
      overflow: hidden;
    }

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

    .faq-icon {
      font-size: 1.2rem;
      transition: transform 0.2s;
    }

    .faq-answer {
      display: none;
      padding: 0 20px 18px;
      font-size: 0.95rem;
      color: var(--text-muted);
      line-height: 1.6;
      border-top: 1px solid #f0f0f0;
      padding-top: 12px;
    }

    .faq-item.active .faq-answer {
      display: block;
    }

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

    /* 用户评论卡片 */
    .reviews-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .review-card {
      background: #ffffff;
      border: 3px solid var(--border-dark);
      border-radius: var(--radius-md);
      padding: 24px;
      box-shadow: var(--shadow-brutal);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .review-stars {
      color: #ff9900;
      margin-bottom: 10px;
      font-size: 1.1rem;
    }

    .review-text {
      font-size: 0.95rem;
      color: var(--text-main);
      line-height: 1.6;
      margin-bottom: 16px;
      font-style: normal;
    }

    .reviewer-meta {
      border-top: 2px dashed #ddd;
      padding-top: 12px;
      display: flex;
      justify-content: space-between;
      align-items: center;
    }

    .reviewer-name {
      font-weight: 800;
      font-size: 0.95rem;
    }

    .reviewer-role {
      font-size: 0.8rem;
      background: #eef2f7;
      padding: 2px 8px;
      border-radius: 4px;
      font-weight: 600;
    }

    /* 行业资讯 / 最新文章 */
    .articles-box {
      background: #ffffff;
      border: 3px solid var(--border-dark);
      border-radius: var(--radius-md);
      padding: 28px;
      box-shadow: var(--shadow-brutal);
    }

    .articles-links-list {
      display: grid;
      gap: 12px;
      list-style: none;
      margin-top: 16px;
    }

    .articles-links-list a {
      display: block;
      padding: 12px 16px;
      background: #f9f9fb;
      border: 1.5px solid var(--border-dark);
      border-radius: var(--radius-sm);
      font-weight: 700;
      transition: all 0.2s;
    }

    .articles-links-list a:hover {
      background: var(--accent-yellow);
      transform: translateX(4px);
    }

    /* 友情链接 */
    .friendly-links-wrap {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
      align-items: center;
    }

    .friendly-links-wrap a {
      background: #ffffff;
      border: 2px solid var(--border-dark);
      padding: 6px 14px;
      border-radius: 6px;
      font-size: 0.88rem;
      font-weight: 700;
      box-shadow: var(--shadow-brutal-hover);
      transition: all 0.15s;
    }

    .friendly-links-wrap a:hover {
      background: var(--accent-teal);
      transform: translateY(-2px);
    }

    /* 浮动客服入口 */
    .floating-contact-bubble {
      position: fixed;
      right: 24px;
      bottom: 24px;
      z-index: 999;
      background: var(--accent-yellow);
      border: 3px solid var(--border-dark);
      border-radius: 50px;
      padding: 10px 18px;
      box-shadow: var(--shadow-brutal);
      display: flex;
      align-items: center;
      gap: 8px;
      font-weight: 800;
      cursor: pointer;
      transition: all 0.2s;
    }

    .floating-contact-bubble:hover {
      transform: scale(1.05);
    }

    /* 微信客服模态框 */
    .qr-modal {
      display: none;
      position: fixed;
      inset: 0;
      background: rgba(0, 0, 0, 0.6);
      z-index: 2000;
      align-items: center;
      justify-content: center;
      padding: 20px;
    }

    .qr-modal-content {
      background: #ffffff;
      border: 3px solid var(--border-dark);
      border-radius: var(--radius-md);
      padding: 28px;
      max-width: 340px;
      text-align: center;
      box-shadow: var(--shadow-brutal-lg);
      position: relative;
    }

    .qr-modal-close {
      position: absolute;
      top: 10px;
      right: 14px;
      font-size: 1.4rem;
      background: none;
      border: none;
      cursor: pointer;
      font-weight: 900;
    }

    .qr-modal img {
      max-width: 200px;
      height: auto;
      margin: 16px auto;
      display: block;
      border: 2px solid var(--border-dark);
    }

    /* 页脚 */
    footer.site-footer {
      background: #23272e;
      color: #eaecef;
      padding: 56px 0 32px;
      border-top: 4px solid var(--border-dark);
    }

    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1fr;
      gap: 36px;
      margin-bottom: 40px;
    }

    .footer-col h4 {
      color: #ffffff;
      font-size: 1.1rem;
      font-weight: 800;
      margin-bottom: 16px;
      position: relative;
      display: inline-block;
    }

    .footer-col h4::after {
      content: "";
      position: absolute;
      left: 0;
      bottom: -4px;
      width: 32px;
      height: 3px;
      background: var(--accent-yellow);
    }

    .footer-col p, .footer-col li {
      font-size: 0.9rem;
      color: #b0b8c4;
      line-height: 1.8;
    }

    .footer-col ul {
      list-style: none;
    }

    .footer-col a:hover {
      color: var(--accent-yellow);
    }

    .footer-bottom {
      border-top: 1px solid #3c434f;
      padding-top: 24px;
      text-align: center;
      font-size: 0.85rem;
      color: #8c96a5;
    }

    /* 响应式调整 */
    @media (max-width: 992px) {
      .features-grid, .reviews-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .metrics-grid, .process-steps {
        grid-template-columns: repeat(2, 1fr);
      }
      .about-box {
        grid-template-columns: 1fr;
      }
      .footer-grid {
        grid-template-columns: 1fr 1fr;
      }
      h1.hero-main-title {
        font-size: 2.3rem;
      }
    }

    @media (max-width: 768px) {
      .mobile-menu-toggle {
        display: block;
      }
      .nav-links {
        display: none;
        flex-direction: column;
        position: absolute;
        top: 76px;
        left: 0;
        width: 100%;
        background: #ffffff;
        border-bottom: 3px solid var(--border-dark);
        padding: 16px 24px;
        box-shadow: 0 10px 15px rgba(0,0,0,0.1);
      }
      .nav-links.active {
        display: flex;
      }
      .features-grid, .case-grid, .reviews-grid, .process-steps, .metrics-grid {
        grid-template-columns: 1fr;
      }
      .footer-grid {
        grid-template-columns: 1fr;
      }
      .header-cta-btn {
        display: none;
      }
      h1.hero-main-title {
        font-size: 1.85rem;
      }
    }