:root {
      --primary-yellow: #fcd34d;
      --accent-yellow: #f59e0b;
      --yellow-glow: #fbbf24;
      --bg-light: #fafaf9;
      --bg-white: #ffffff;
      --bg-card: #ffffff;
      --text-main: #1c1917;
      --text-muted: #57534e;
      --text-light: #78716c;
      --border-color: #f3f4f6;
      --border-accent: #fde68a;
      --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.04);
      --shadow-md: 0 10px 25px -5px rgba(245, 158, 11, 0.1), 0 8px 10px -6px rgba(0, 0, 0, 0.05);
      --shadow-lg: 0 20px 30px -10px rgba(245, 158, 11, 0.15);
      --radius-sm: 8px;
      --radius-md: 14px;
      --radius-lg: 20px;
      --radius-full: 9999px;
      --container-width: 1200px;
      --transition: all 0.28s ease;
    }

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

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

    body {
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
      background-color: var(--bg-light);
      color: var(--text-main);
      line-height: 1.65;
      overflow-x: hidden;
      display: flex;
      flex-direction: column;
      min-height: 100vh;
    }

    .container {
      width: 100%;
      max-width: var(--container-width);
      margin: 0 auto;
      padding: 0 24px;
    }

    /* 顶部导航 */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 100;
      background: rgba(255, 255, 255, 0.95);
      backdrop-filter: blur(12px);
      border-bottom: 2px solid var(--border-accent);
      box-shadow: var(--shadow-sm);
    }

    .nav-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 72px;
    }

    .brand-logo-area {
      display: flex;
      align-items: center;
      gap: 12px;
      text-decoration: none;
    }

    .ai-page-logo {
      height: 38px;
      width: auto;
      display: block;
    }

    .brand-title-badge {
      font-weight: 800;
      font-size: 1.25rem;
      color: var(--text-main);
      letter-spacing: -0.5px;
    }

    .brand-title-badge span {
      background: var(--primary-yellow);
      padding: 2px 6px;
      border-radius: 4px;
      margin-left: 4px;
      font-size: 0.85rem;
    }

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

    .nav-links li a {
      color: var(--text-main);
      text-decoration: none;
      font-weight: 500;
      font-size: 0.95rem;
      padding: 8px 14px;
      border-radius: var(--radius-sm);
      transition: var(--transition);
      display: inline-block;
    }

    .nav-links li a:hover {
      background: #fef3c7;
      color: #b45309;
    }

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

    .btn-nav-primary {
      background: linear-gradient(135deg, var(--primary-yellow), var(--accent-yellow));
      color: #78350f;
      font-weight: 700;
      padding: 8px 20px;
      border-radius: var(--radius-full);
      text-decoration: none;
      box-shadow: 0 4px 12px rgba(245, 158, 11, 0.25);
      transition: var(--transition);
      border: 1px solid #fbbf24;
      font-size: 0.9rem;
    }

    .btn-nav-primary:hover {
      transform: translateY(-1px);
      box-shadow: 0 6px 16px rgba(245, 158, 11, 0.35);
    }

    .mobile-menu-toggle {
      display: none;
      background: transparent;
      border: none;
      font-size: 1.5rem;
      cursor: pointer;
      color: var(--text-main);
      padding: 4px 8px;
    }

    /* 按钮通用 */
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      border-radius: var(--radius-full);
      text-decoration: none;
      cursor: pointer;
      transition: var(--transition);
      border: none;
      padding: 14px 32px;
      font-size: 1.05rem;
    }

    .btn-glow-yellow {
      background: linear-gradient(135deg, #fcd34d 0%, #f59e0b 100%);
      color: #451a03;
      box-shadow: 0 10px 25px rgba(245, 158, 11, 0.35);
      border: 2px solid #fff;
    }

    .btn-glow-yellow:hover {
      transform: translateY(-2px);
      box-shadow: 0 14px 30px rgba(245, 158, 11, 0.45);
    }

    .btn-outline-dark {
      background: var(--bg-white);
      color: var(--text-main);
      border: 2px solid #e7e5e4;
    }

    .btn-outline-dark:hover {
      border-color: var(--accent-yellow);
      background: #fffbeb;
      transform: translateY(-2px);
    }

    /* 首屏 Hero - 严格无图片 */
    .hero-section {
      background: linear-gradient(180deg, #fffbeb 0%, #fafaf9 100%);
      padding: 80px 0 60px;
      position: relative;
      overflow: hidden;
      border-bottom: 1px solid #fde68a;
    }

    .hero-grid {
      display: grid;
      grid-template-columns: 1.2fr 0.8fr;
      gap: 48px;
      align-items: center;
    }

    .hero-badge-pill {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      background: #fef3c7;
      border: 1px solid #fde68a;
      color: #92400e;
      padding: 6px 16px;
      border-radius: var(--radius-full);
      font-size: 0.875rem;
      font-weight: 700;
      margin-bottom: 20px;
    }

    .hero-title {
      font-size: 2.75rem;
      font-weight: 900;
      line-height: 1.25;
      color: #1c1917;
      margin-bottom: 20px;
      letter-spacing: -1px;
    }

    .hero-title .highlight {
      background: linear-gradient(120deg, #f59e0b 0%, #d97706 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      border-bottom: 4px solid var(--primary-yellow);
    }

    .hero-subtitle {
      font-size: 1.15rem;
      color: var(--text-muted);
      margin-bottom: 32px;
      line-height: 1.7;
    }

    .hero-cta-group {
      display: flex;
      gap: 16px;
      flex-wrap: wrap;
      margin-bottom: 36px;
    }

    .hero-stat-row {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 16px;
      padding-top: 24px;
      border-top: 1px dashed #e7e5e4;
    }

    .hero-stat-item h4 {
      font-size: 1.5rem;
      color: #b45309;
      font-weight: 800;
    }

    .hero-stat-item p {
      font-size: 0.85rem;
      color: var(--text-light);
    }

    /* 首屏纯 CSS 交互卡片 - 无任何 img */
    .hero-interactive-board {
      background: var(--bg-white);
      border-radius: var(--radius-lg);
      padding: 32px;
      border: 2px solid #fde68a;
      box-shadow: var(--shadow-lg);
      position: relative;
    }

    .board-header {
      display: flex;
      justify-content: space-between;
      align-items: center;
      margin-bottom: 24px;
      padding-bottom: 16px;
      border-bottom: 1px solid #f3f4f6;
    }

    .board-title {
      font-weight: 800;
      font-size: 1.1rem;
      display: flex;
      align-items: center;
      gap: 8px;
    }

    .board-dot {
      width: 10px;
      height: 10px;
      background: #10b981;
      border-radius: 50%;
      box-shadow: 0 0 0 4px #d1fae5;
    }

    .model-tags-container {
      display: flex;
      flex-wrap: wrap;
      gap: 8px;
      margin-bottom: 24px;
    }

    .tag-item {
      background: #fffbeb;
      border: 1px solid #fef3c7;
      color: #92400e;
      padding: 4px 10px;
      border-radius: 6px;
      font-size: 0.8rem;
      font-weight: 600;
    }

    .tag-item.active {
      background: #f59e0b;
      color: #ffffff;
    }

    .board-flow-box {
      background: #fafaf9;
      border-radius: var(--radius-md);
      padding: 16px;
      border: 1px solid #e7e5e4;
    }

    .flow-item {
      display: flex;
      align-items: center;
      justify-content: space-between;
      padding: 8px 0;
      font-size: 0.875rem;
      font-weight: 600;
      border-bottom: 1px solid #f3f4f6;
    }

    .flow-item:last-child {
      border-bottom: none;
    }

    .flow-status {
      color: #059669;
      background: #ecfdf5;
      padding: 2px 8px;
      border-radius: 4px;
      font-size: 0.75rem;
    }

    /* 区块通用结构 */
    .section-wrap {
      padding: 80px 0;
      border-bottom: 1px solid #f3f4f6;
    }

    .section-wrap.bg-alt {
      background: #fffdf5;
    }

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

    .section-eyebrow {
      display: inline-block;
      font-size: 0.85rem;
      font-weight: 800;
      text-transform: uppercase;
      letter-spacing: 1.5px;
      color: #b45309;
      background: #fef3c7;
      padding: 4px 14px;
      border-radius: var(--radius-full);
      margin-bottom: 12px;
    }

    .section-heading {
      font-size: 2.15rem;
      font-weight: 800;
      color: var(--text-main);
      margin-bottom: 16px;
      letter-spacing: -0.5px;
    }

    .section-desc {
      font-size: 1.05rem;
      color: var(--text-muted);
    }

    /* 卡片网格 */
    .grid-3 {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }

    .grid-4 {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
    }

    .grid-2 {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 32px;
    }

    .card-feature {
      background: var(--bg-white);
      border-radius: var(--radius-md);
      padding: 28px;
      border: 1px solid #fef3c7;
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .card-feature:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-md);
      border-color: #fcd34d;
    }

    .card-icon-pill {
      width: 48px;
      height: 48px;
      background: #fffbeb;
      border: 1px solid #fde68a;
      border-radius: 12px;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.4rem;
      margin-bottom: 18px;
      color: #b45309;
    }

    .card-feature h3 {
      font-size: 1.25rem;
      font-weight: 700;
      margin-bottom: 12px;
      color: #292524;
    }

    .card-feature p {
      font-size: 0.95rem;
      color: var(--text-muted);
      line-height: 1.6;
    }

    .card-footer-tags {
      margin-top: 18px;
      padding-top: 14px;
      border-top: 1px dashed #f3f4f6;
      display: flex;
      gap: 6px;
      flex-wrap: wrap;
    }

    .mini-badge {
      font-size: 0.75rem;
      background: #fafaf9;
      border: 1px solid #e7e5e4;
      padding: 2px 8px;
      border-radius: 4px;
      color: #78716c;
    }

    /* 宣传图画廊 */
    .banner-gallery-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
      margin-top: 32px;
    }

    .media-card {
      background: #ffffff;
      border-radius: var(--radius-md);
      overflow: hidden;
      border: 1px solid #fef3c7;
      box-shadow: var(--shadow-sm);
    }

    .media-card img {
      width: 100%;
      height: 220px;
      object-fit: cover;
      display: block;
      transition: var(--transition);
    }

    .media-card:hover img {
      transform: scale(1.02);
    }

    .media-card-body {
      padding: 16px;
      background: #ffffff;
    }

    .media-card-body h4 {
      font-size: 1rem;
      font-weight: 700;
      color: #292524;
      margin-bottom: 4px;
    }

    .media-card-body p {
      font-size: 0.85rem;
      color: var(--text-light);
    }

    /* 评测对比模块 */
    .review-score-banner {
      background: linear-gradient(135deg, #fffbeb, #fef3c7);
      border: 2px solid #f59e0b;
      border-radius: var(--radius-lg);
      padding: 36px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      margin-bottom: 40px;
      box-shadow: var(--shadow-md);
    }

    .score-left h3 {
      font-size: 1.8rem;
      color: #78350f;
      font-weight: 800;
      margin-bottom: 8px;
    }

    .score-left p {
      color: #92400e;
      font-size: 1rem;
    }

    .score-badge-box {
      text-align: right;
      background: #ffffff;
      padding: 16px 28px;
      border-radius: var(--radius-md);
      border: 2px solid #fcd34d;
      box-shadow: var(--shadow-sm);
    }

    .score-stars {
      color: #f59e0b;
      font-size: 1.5rem;
      margin-bottom: 4px;
    }

    .score-number {
      font-size: 2.2rem;
      font-weight: 900;
      color: #b45309;
    }

    .score-number small {
      font-size: 1rem;
      color: var(--text-light);
      font-weight: 500;
    }

    /* 对比表格 */
    .table-container {
      width: 100%;
      overflow-x: auto;
      background: #ffffff;
      border-radius: var(--radius-md);
      border: 1px solid #fde68a;
      box-shadow: var(--shadow-sm);
    }

    .custom-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
      min-width: 680px;
    }

    .custom-table th, .custom-table td {
      padding: 18px 24px;
      border-bottom: 1px solid #f3f4f6;
    }

    .custom-table th {
      background: #fffbeb;
      font-weight: 700;
      color: #78350f;
      font-size: 1rem;
    }

    .custom-table tr:hover td {
      background: #fffdf5;
    }

    .col-highlight {
      background: #fffdf0;
      font-weight: 700;
      color: #b45309;
    }

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

    .step-card {
      background: #ffffff;
      border: 1px solid #fef3c7;
      border-radius: var(--radius-md);
      padding: 24px;
      position: relative;
    }

    .step-num {
      width: 36px;
      height: 36px;
      background: #f59e0b;
      color: #ffffff;
      font-weight: 800;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1rem;
      margin-bottom: 16px;
    }

    .step-card h4 {
      font-size: 1.15rem;
      margin-bottom: 8px;
      color: #292524;
    }

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

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

    .testimonial-card {
      background: #ffffff;
      border-radius: var(--radius-md);
      padding: 28px;
      border: 1px solid #fde68a;
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .testimonial-quote {
      font-size: 0.95rem;
      color: #44403c;
      line-height: 1.7;
      margin-bottom: 20px;
      position: relative;
    }

    .user-profile {
      display: flex;
      align-items: center;
      gap: 12px;
      padding-top: 16px;
      border-top: 1px solid #f3f4f6;
    }

    .user-avatar-char {
      width: 44px;
      height: 44px;
      background: #fcd34d;
      color: #78350f;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 800;
      font-size: 1.1rem;
    }

    .user-info-text h5 {
      font-size: 0.95rem;
      font-weight: 700;
      color: #1c1917;
    }

    .user-info-text p {
      font-size: 0.8rem;
      color: var(--text-light);
    }

    /* FAQ 折叠面板 */
    .faq-accordion {
      max-width: 860px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      gap: 16px;
    }

    .faq-item {
      background: #ffffff;
      border: 1px solid #fef3c7;
      border-radius: var(--radius-md);
      overflow: hidden;
      transition: var(--transition);
    }

    .faq-item:hover {
      border-color: #f59e0b;
    }

    .faq-question {
      padding: 20px 24px;
      font-size: 1.05rem;
      font-weight: 700;
      color: #292524;
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      background: #ffffff;
    }

    .faq-toggle-icon {
      font-size: 1.2rem;
      color: #f59e0b;
      transition: transform 0.3s ease;
    }

    .faq-answer {
      padding: 0 24px 20px;
      font-size: 0.95rem;
      color: var(--text-muted);
      line-height: 1.7;
      display: none;
    }

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

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

    /* 表单与需求匹配 */
    .form-box-wrapper {
      max-width: 760px;
      margin: 0 auto;
      background: #ffffff;
      border-radius: var(--radius-lg);
      padding: 40px;
      border: 2px solid #fde68a;
      box-shadow: var(--shadow-md);
    }

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

    .form-group label {
      display: block;
      font-weight: 700;
      margin-bottom: 8px;
      color: #292524;
      font-size: 0.95rem;
    }

    .form-control {
      width: 100%;
      padding: 12px 16px;
      border: 1px solid #e7e5e4;
      border-radius: var(--radius-sm);
      font-size: 1rem;
      background: #fafaf9;
      color: var(--text-main);
      transition: var(--transition);
    }

    .form-control:focus {
      outline: none;
      border-color: #f59e0b;
      background: #ffffff;
      box-shadow: 0 0 0 3px #fef3c7;
    }

    textarea.form-control {
      resize: vertical;
      min-height: 110px;
    }

    /* 文章列表 & 友情链接 */
    .article-link-list {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
      margin-top: 16px;
    }

    .article-pill {
      background: #ffffff;
      border: 1px solid #e7e5e4;
      padding: 8px 16px;
      border-radius: var(--radius-full);
      text-decoration: none;
      color: var(--text-muted);
      font-size: 0.9rem;
      transition: var(--transition);
    }

    .article-pill:hover {
      border-color: #f59e0b;
      color: #b45309;
      background: #fffbeb;
    }

    /* 底部通用 */
    .site-footer {
      background: #292524;
      color: #e7e5e4;
      padding: 60px 0 30px;
      border-top: 4px solid #f59e0b;
    }

    .footer-grid {
      display: grid;
      grid-template-columns: 1.5fr 1fr 1fr 1fr;
      gap: 40px;
      margin-bottom: 40px;
    }

    .footer-col h4 {
      color: #ffffff;
      font-size: 1.1rem;
      font-weight: 700;
      margin-bottom: 20px;
      position: relative;
    }

    .footer-col h4::after {
      content: '';
      position: absolute;
      left: 0;
      bottom: -6px;
      width: 24px;
      height: 2px;
      background: var(--primary-yellow);
    }

    .footer-col p {
      font-size: 0.9rem;
      color: #a8a29e;
      line-height: 1.7;
      margin-bottom: 12px;
    }

    .footer-links {
      list-style: none;
    }

    .footer-links li {
      margin-bottom: 10px;
    }

    .footer-links a {
      color: #d6d3d1;
      text-decoration: none;
      font-size: 0.9rem;
      transition: var(--transition);
    }

    .footer-links a:hover {
      color: var(--primary-yellow);
      padding-left: 4px;
    }

    .qr-container {
      display: flex;
      flex-direction: column;
      gap: 8px;
    }

    .qr-container img {
      width: 110px;
      height: 110px;
      border-radius: 8px;
      border: 2px solid #57534e;
      background: #ffffff;
    }

    .friend-links-bar {
      padding-top: 24px;
      border-top: 1px solid #44403c;
      margin-bottom: 24px;
      display: flex;
      flex-wrap: wrap;
      align-items: center;
      gap: 16px;
      font-size: 0.85rem;
    }

    .friend-links-bar a {
      color: #a8a29e;
      text-decoration: none;
      transition: var(--transition);
    }

    .friend-links-bar a:hover {
      color: var(--primary-yellow);
    }

    .footer-bottom {
      text-align: center;
      padding-top: 24px;
      border-top: 1px solid #44403c;
      font-size: 0.85rem;
      color: #78716c;
    }

    /* 浮动客服 */
    .float-kefu-btn {
      position: fixed;
      right: 24px;
      bottom: 30px;
      z-index: 99;
      background: linear-gradient(135deg, var(--primary-yellow), var(--accent-yellow));
      color: #451a03;
      padding: 12px 20px;
      border-radius: var(--radius-full);
      box-shadow: 0 8px 24px rgba(245, 158, 11, 0.4);
      display: flex;
      align-items: center;
      gap: 8px;
      text-decoration: none;
      font-weight: 700;
      font-size: 0.95rem;
      border: 2px solid #ffffff;
      transition: var(--transition);
    }

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

    /* 响应式适配 */
    @media (max-width: 992px) {
      .hero-grid {
        grid-template-columns: 1fr;
      }
      .grid-4 {
        grid-template-columns: repeat(2, 1fr);
      }
      .grid-3, .banner-gallery-grid, .testimonials-grid, .process-steps-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .footer-grid {
        grid-template-columns: repeat(2, 1fr);
      }
    }

    @media (max-width: 768px) {
      .mobile-menu-toggle {
        display: block;
      }
      .nav-links {
        display: none;
        position: absolute;
        top: 72px;
        left: 0;
        width: 100%;
        background: #ffffff;
        flex-direction: column;
        padding: 16px 24px;
        box-shadow: 0 10px 15px rgba(0, 0, 0, 0.05);
        border-bottom: 2px solid var(--border-accent);
      }
      .nav-links.active {
        display: flex;
      }
      .nav-links li {
        width: 100%;
      }
      .nav-links li a {
        width: 100%;
        padding: 10px 0;
      }
      .hero-title {
        font-size: 2rem;
      }
      .grid-3, .grid-4, .grid-2, .banner-gallery-grid, .testimonials-grid, .process-steps-grid {
        grid-template-columns: 1fr;
      }
      .footer-grid {
        grid-template-columns: 1fr;
      }
      .review-score-banner {
        flex-direction: column;
        text-align: center;
        gap: 20px;
      }
      .score-badge-box {
        text-align: center;
      }
    }