:root {
      --primary-yellow: #f59e0b;
      --vibrant-yellow: #fbbf24;
      --accent-gold: #d97706;
      --dark-charcoal: #111827;
      --slate-title: #1f2937;
      --text-main: #374151;
      --text-muted: #6b7280;
      --bg-page: #fefce8;
      --bg-warm-light: #fffbeb;
      --white-pure: #ffffff;
      --border-amber: #fde68a;
      --border-subtle: #f3f4f6;
      --shadow-soft: 0 4px 20px -2px rgba(245, 158, 11, 0.12);
      --shadow-hover: 0 12px 28px -4px rgba(217, 119, 6, 0.2);
      --container-max: 1200px;
    }

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

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

    body {
      background-color: var(--bg-page);
      background-image: radial-gradient(circle at 10% 20%, rgba(254, 240, 138, 0.4) 0%, transparent 40%),
                        radial-gradient(circle at 90% 80%, rgba(253, 230, 138, 0.3) 0%, transparent 40%);
      background-attachment: fixed;
      color: var(--text-main);
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      line-height: 1.65;
      overflow-x: hidden;
    }

    a {
      text-decoration: none;
      color: inherit;
      transition: all 0.25s ease;
    }

    ul, ol {
      list-style: none;
    }

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

    /* 顶部导航 */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(255, 255, 255, 0.95);
      backdrop-filter: blur(10px);
      border-bottom: 2px solid var(--vibrant-yellow);
      box-shadow: 0 2px 10px rgba(0,0,0,0.05);
    }

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

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

    .ai-page-logo {
      height: 42px;
      width: auto;
      display: block;
    }

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

    .brand-title span {
      color: var(--accent-gold);
    }

    .nav-links {
      display: flex;
      align-items: center;
      gap: 0;
    }

    .nav-item {
      display: inline-block;
      padding: 8px 14px;
      font-weight: 600;
      font-size: 0.95rem;
      color: var(--slate-title);
      border-radius: 6px;
    }

    .nav-item:hover, .nav-item.active {
      color: var(--accent-gold);
      background-color: var(--bg-warm-light);
    }

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

    .btn-main-glow {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 10px 22px;
      background: linear-gradient(135deg, #fbbf24 0%, #f59e0b 100%);
      color: var(--dark-charcoal);
      font-weight: 700;
      font-size: 0.95rem;
      border-radius: 30px;
      border: 1px solid #f59e0b;
      box-shadow: 0 4px 14px rgba(245, 158, 11, 0.35);
      cursor: pointer;
    }

    .btn-main-glow:hover {
      transform: translateY(-2px);
      box-shadow: 0 6px 20px rgba(245, 158, 11, 0.5);
      background: linear-gradient(135deg, #fcd34d 0%, #fbbf24 100%);
    }

    .mobile-menu-btn {
      display: none;
      background: none;
      border: none;
      cursor: pointer;
      padding: 6px;
    }

    .mobile-menu-btn span {
      display: block;
      width: 24px;
      height: 3px;
      background-color: var(--dark-charcoal);
      margin: 4px 0;
      border-radius: 2px;
    }

    /* 首屏 Hero 无图片纯视觉科技质感 */
    .hero-section {
      padding: 64px 0 54px;
      background: linear-gradient(180deg, #fffbeb 0%, #fef3c7 40%, var(--bg-page) 100%);
      position: relative;
    }

    .hero-badge-wrap {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      background: #ffffff;
      padding: 6px 16px;
      border-radius: 20px;
      border: 1px solid var(--border-amber);
      box-shadow: var(--shadow-soft);
      margin-bottom: 20px;
    }

    .badge-dot {
      width: 8px;
      height: 8px;
      border-radius: 50%;
      background: #10b981;
      box-shadow: 0 0 0 3px rgba(16, 185, 129, 0.2);
    }

    .hero-badge-text {
      font-size: 0.875rem;
      font-weight: 700;
      color: var(--accent-gold);
    }

    .hero-content {
      max-width: 860px;
      margin: 0 auto;
      text-align: center;
    }

    .main-h1 {
      font-size: 2.5rem;
      font-weight: 900;
      color: var(--dark-charcoal);
      line-height: 1.25;
      margin-bottom: 20px;
      letter-spacing: -1px;
    }

    .main-h1 mark {
      background: transparent;
      color: var(--accent-gold);
      position: relative;
    }

    .hero-subtitle {
      font-size: 1.15rem;
      color: var(--text-main);
      margin-bottom: 32px;
      font-weight: 500;
    }

    .hero-actions-group {
      display: flex;
      justify-content: center;
      gap: 16px;
      flex-wrap: wrap;
      margin-bottom: 40px;
    }

    .btn-hero-primary {
      padding: 14px 34px;
      font-size: 1.1rem;
      font-weight: 800;
      border-radius: 36px;
      background: linear-gradient(135deg, #f59e0b 0%, #d97706 100%);
      color: #ffffff;
      box-shadow: 0 6px 20px rgba(217, 119, 6, 0.35);
      border: none;
      cursor: pointer;
    }

    .btn-hero-primary:hover {
      transform: translateY(-3px);
      box-shadow: 0 10px 25px rgba(217, 119, 6, 0.5);
    }

    .btn-hero-outline {
      padding: 14px 32px;
      font-size: 1.05rem;
      font-weight: 700;
      border-radius: 36px;
      background: #ffffff;
      color: var(--dark-charcoal);
      border: 2px solid var(--vibrant-yellow);
      box-shadow: var(--shadow-soft);
    }

    .btn-hero-outline:hover {
      background: var(--bg-warm-light);
      border-color: var(--accent-gold);
      transform: translateY(-2px);
    }

    /* 亮点指标矩阵 */
    .metrics-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 16px;
      margin-top: 24px;
    }

    .metric-card {
      background: #ffffff;
      border: 1px solid var(--border-amber);
      border-radius: 14px;
      padding: 20px 16px;
      text-align: center;
      box-shadow: var(--shadow-soft);
      transition: transform 0.25s ease;
    }

    .metric-card:hover {
      transform: translateY(-4px);
    }

    .metric-val {
      font-size: 1.8rem;
      font-weight: 800;
      color: var(--accent-gold);
      margin-bottom: 4px;
    }

    .metric-lbl {
      font-size: 0.9rem;
      font-weight: 600;
      color: var(--text-muted);
    }

    /* 通用分块与标题 */
    .section-block {
      padding: 64px 0;
      position: relative;
    }

    .section-alt {
      background: #ffffff;
      border-top: 1px solid var(--border-amber);
      border-bottom: 1px solid var(--border-amber);
    }

    .section-header {
      text-align: center;
      max-width: 760px;
      margin: 0 auto 44px;
    }

    .section-tag {
      display: inline-block;
      font-size: 0.85rem;
      font-weight: 700;
      color: var(--accent-gold);
      background: #fffbeb;
      border: 1px solid var(--border-amber);
      padding: 4px 14px;
      border-radius: 16px;
      margin-bottom: 12px;
      text-transform: uppercase;
    }

    .section-title {
      font-size: 2rem;
      font-weight: 800;
      color: var(--dark-charcoal);
      margin-bottom: 12px;
    }

    .section-desc {
      font-size: 1rem;
      color: var(--text-muted);
    }

    /* 平台介绍卡片布局 */
    .intro-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 32px;
      align-items: center;
    }

    .intro-info-card {
      background: #ffffff;
      border: 1px solid var(--border-amber);
      border-radius: 18px;
      padding: 32px;
      box-shadow: var(--shadow-soft);
    }

    .intro-info-card h3 {
      font-size: 1.4rem;
      font-weight: 800;
      color: var(--dark-charcoal);
      margin-bottom: 16px;
      display: flex;
      align-items: center;
      gap: 10px;
    }

    .intro-info-card h3::before {
      content: "";
      width: 6px;
      height: 22px;
      background: var(--vibrant-yellow);
      border-radius: 3px;
    }

    .intro-features-list {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 16px;
      margin-top: 24px;
    }

    .intro-feature-item {
      background: var(--bg-warm-light);
      padding: 14px;
      border-radius: 10px;
      border-left: 3px solid var(--accent-gold);
      font-size: 0.95rem;
      font-weight: 600;
      color: var(--slate-title);
    }

    /* 模型矩阵徽章 */
    .models-chip-wall {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      margin-top: 20px;
    }

    .model-chip {
      background: #ffffff;
      border: 1px solid var(--border-amber);
      padding: 8px 16px;
      border-radius: 20px;
      font-size: 0.875rem;
      font-weight: 700;
      color: var(--slate-title);
      box-shadow: 0 2px 6px rgba(0,0,0,0.02);
      transition: all 0.2s ease;
    }

    .model-chip:hover {
      background: var(--vibrant-yellow);
      color: var(--dark-charcoal);
      transform: translateY(-2px);
    }

    /* 核心场景卡片网格 */
    .scenarios-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 22px;
    }

    .scenario-card {
      background: #ffffff;
      border: 1px solid var(--border-amber);
      border-radius: 16px;
      padding: 24px;
      box-shadow: var(--shadow-soft);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
      transition: all 0.25s ease;
    }

    .scenario-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-hover);
      border-color: var(--accent-gold);
    }

    .scenario-card h4 {
      font-size: 1.15rem;
      font-weight: 800;
      color: var(--dark-charcoal);
      margin-bottom: 10px;
    }

    .scenario-card p {
      font-size: 0.925rem;
      color: var(--text-main);
      margin-bottom: 16px;
      flex-grow: 1;
    }

    .scenario-tag {
      align-self: flex-start;
      font-size: 0.8rem;
      background: var(--bg-warm-light);
      color: var(--accent-gold);
      padding: 3px 10px;
      border-radius: 6px;
      font-weight: 700;
    }

    /* 对比评测板块 */
    .review-score-banner {
      background: linear-gradient(135deg, #fffbeb 0%, #fef3c7 100%);
      border: 2px solid var(--vibrant-yellow);
      border-radius: 20px;
      padding: 28px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      flex-wrap: wrap;
      gap: 20px;
      margin-bottom: 30px;
      box-shadow: var(--shadow-soft);
    }

    .score-rating-box {
      display: flex;
      align-items: center;
      gap: 20px;
    }

    .score-number {
      font-size: 3.5rem;
      font-weight: 900;
      color: var(--accent-gold);
      line-height: 1;
    }

    .score-meta {
      font-size: 1rem;
    }

    .stars-icon {
      color: #f59e0b;
      font-size: 1.4rem;
      letter-spacing: 2px;
      margin-bottom: 4px;
    }

    .table-container {
      width: 100%;
      overflow-x: auto;
      background: #ffffff;
      border-radius: 16px;
      border: 1px solid var(--border-amber);
      box-shadow: var(--shadow-soft);
    }

    .comparison-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
    }

    .comparison-table th, .comparison-table td {
      padding: 16px 20px;
      font-size: 0.95rem;
      border-bottom: 1px solid var(--border-amber);
    }

    .comparison-table th {
      background: var(--bg-warm-light);
      font-weight: 800;
      color: var(--dark-charcoal);
    }

    .comparison-table tr:last-child td {
      border-bottom: none;
    }

    .badge-win {
      display: inline-block;
      padding: 4px 10px;
      background: #dcfce7;
      color: #15803d;
      font-weight: 700;
      border-radius: 6px;
      font-size: 0.85rem;
    }

    .badge-norm {
      display: inline-block;
      padding: 4px 10px;
      background: #f3f4f6;
      color: #4b5563;
      font-weight: 600;
      border-radius: 6px;
      font-size: 0.85rem;
    }

    /* 流程与方案 */
    .steps-timeline {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      position: relative;
    }

    .step-item {
      background: #ffffff;
      border: 1px solid var(--border-amber);
      border-radius: 14px;
      padding: 24px 18px;
      position: relative;
      box-shadow: var(--shadow-soft);
    }

    .step-num {
      width: 36px;
      height: 36px;
      background: var(--vibrant-yellow);
      color: var(--dark-charcoal);
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 800;
      margin-bottom: 14px;
    }

    .step-item h4 {
      font-size: 1.1rem;
      font-weight: 800;
      color: var(--dark-charcoal);
      margin-bottom: 8px;
    }

    /* 素材画廊区 */
    .gallery-grid {
      display: grid;
      grid-template-columns: 2fr 1fr;
      gap: 20px;
    }

    .gallery-card {
      background: #ffffff;
      border: 1px solid var(--border-amber);
      border-radius: 16px;
      overflow: hidden;
      box-shadow: var(--shadow-soft);
    }

    .img-box {
      width: 100%;
      overflow: hidden;
      background: #f3f4f6;
    }

    .img-box img {
      width: 100%;
      height: auto;
      display: block;
      transition: transform 0.3s ease;
    }

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

    .gallery-body {
      padding: 20px;
    }

    .gallery-body h4 {
      font-size: 1.15rem;
      font-weight: 800;
      color: var(--dark-charcoal);
      margin-bottom: 6px;
    }

    /* FAQ 折叠面板 */
    .faq-accordion {
      max-width: 900px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      gap: 14px;
    }

    .faq-item {
      background: #ffffff;
      border: 1px solid var(--border-amber);
      border-radius: 12px;
      overflow: hidden;
      box-shadow: var(--shadow-soft);
      transition: border-color 0.2s;
    }

    .faq-header {
      padding: 18px 24px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      cursor: pointer;
      font-weight: 700;
      font-size: 1.05rem;
      color: var(--dark-charcoal);
      background: #ffffff;
    }

    .faq-header:hover {
      background: var(--bg-warm-light);
    }

    .faq-icon {
      font-size: 1.25rem;
      color: var(--accent-gold);
      transition: transform 0.2s ease;
    }

    .faq-content {
      padding: 0 24px 18px;
      font-size: 0.95rem;
      color: var(--text-main);
      display: none;
      border-top: 1px dashed var(--border-amber);
      padding-top: 14px;
    }

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

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

    /* 客户评价网格 */
    .reviews-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 20px;
    }

    .review-card {
      background: #ffffff;
      border: 1px solid var(--border-amber);
      border-radius: 16px;
      padding: 24px;
      box-shadow: var(--shadow-soft);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .review-text {
      font-size: 0.95rem;
      color: var(--text-main);
      margin-bottom: 20px;
      font-style: italic;
    }

    .review-author {
      display: flex;
      align-items: center;
      gap: 12px;
    }

    .author-avatar {
      width: 44px;
      height: 44px;
      border-radius: 50%;
      background: linear-gradient(135deg, #fcd34d, #f59e0b);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 800;
      color: var(--dark-charcoal);
    }

    .author-info h5 {
      font-size: 0.95rem;
      font-weight: 800;
      color: var(--dark-charcoal);
    }

    .author-info span {
      font-size: 0.8rem;
      color: var(--text-muted);
    }

    /* 文章列表 */
    .article-wrap {
      background: #ffffff;
      border: 1px solid var(--border-amber);
      border-radius: 16px;
      padding: 28px;
      box-shadow: var(--shadow-soft);
    }

    .article-links-row {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
      margin-top: 20px;
    }

    .article-pill {
      background: var(--bg-warm-light);
      border: 1px solid var(--border-amber);
      padding: 8px 16px;
      border-radius: 20px;
      font-size: 0.9rem;
      font-weight: 600;
      color: var(--dark-charcoal);
    }

    .article-pill:hover {
      background: var(--vibrant-yellow);
      transform: translateY(-2px);
    }

    /* 需求匹配与联系我们表单 */
    .contact-container {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 32px;
    }

    .contact-info-panel {
      background: #ffffff;
      border: 1px solid var(--border-amber);
      border-radius: 18px;
      padding: 32px;
      box-shadow: var(--shadow-soft);
    }

    .contact-item {
      display: flex;
      align-items: flex-start;
      gap: 14px;
      margin-bottom: 20px;
    }

    .contact-item-icon {
      width: 40px;
      height: 40px;
      background: var(--bg-warm-light);
      border-radius: 10px;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 800;
      color: var(--accent-gold);
      flex-shrink: 0;
    }

    .contact-item-body h5 {
      font-size: 1rem;
      font-weight: 800;
      color: var(--dark-charcoal);
      margin-bottom: 4px;
    }

    .qr-box {
      margin-top: 20px;
      padding: 16px;
      background: var(--bg-warm-light);
      border-radius: 12px;
      display: inline-block;
      text-align: center;
    }

    .qr-box img {
      width: 140px;
      height: 140px;
      display: block;
      border-radius: 8px;
      margin: 0 auto 8px;
    }

    .form-panel {
      background: #ffffff;
      border: 1px solid var(--border-amber);
      border-radius: 18px;
      padding: 32px;
      box-shadow: var(--shadow-soft);
    }

    .form-group {
      margin-bottom: 18px;
    }

    .form-label {
      display: block;
      font-size: 0.9rem;
      font-weight: 700;
      color: var(--slate-title);
      margin-bottom: 6px;
    }

    .form-input, .form-select, .form-textarea {
      width: 100%;
      padding: 12px 14px;
      border: 1px solid #d1d5db;
      border-radius: 8px;
      font-size: 0.95rem;
      outline: none;
      transition: border-color 0.2s;
      background: #fff;
    }

    .form-input:focus, .form-select:focus, .form-textarea:focus {
      border-color: var(--accent-gold);
      box-shadow: 0 0 0 3px rgba(245, 158, 11, 0.15);
    }

    .form-textarea {
      resize: vertical;
      min-height: 90px;
    }

    .btn-submit {
      width: 100%;
      padding: 14px;
      background: linear-gradient(135deg, #f59e0b 0%, #d97706 100%);
      color: #ffffff;
      border: none;
      border-radius: 8px;
      font-size: 1.05rem;
      font-weight: 800;
      cursor: pointer;
      box-shadow: 0 4px 14px rgba(217, 119, 6, 0.3);
      transition: all 0.2s ease;
    }

    .btn-submit:hover {
      transform: translateY(-2px);
      box-shadow: 0 6px 18px rgba(217, 119, 6, 0.45);
    }

    /* 友情链接与页脚 */
    .site-footer {
      background: #111827;
      color: #f3f4f6;
      padding: 48px 0 28px;
      border-top: 4px solid var(--vibrant-yellow);
    }

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

    .footer-brand h4 {
      font-size: 1.3rem;
      font-weight: 800;
      color: #ffffff;
      margin-bottom: 12px;
    }

    .footer-brand p {
      color: #9ca3af;
      font-size: 0.9rem;
      margin-bottom: 16px;
      line-height: 1.6;
    }

    .footer-col h5 {
      font-size: 1rem;
      font-weight: 700;
      color: var(--vibrant-yellow);
      margin-bottom: 16px;
    }

    .footer-col ul li {
      margin-bottom: 8px;
      font-size: 0.9rem;
      color: #d1d5db;
    }

    .footer-col ul li a:hover {
      color: var(--vibrant-yellow);
    }

    .friendly-links {
      border-top: 1px solid #374151;
      padding-top: 24px;
      margin-bottom: 24px;
    }

    .friendly-links-title {
      font-size: 0.9rem;
      font-weight: 700;
      color: var(--vibrant-yellow);
      margin-bottom: 10px;
    }

    .links-items {
      display: flex;
      flex-wrap: wrap;
      gap: 16px;
    }

    .links-items a {
      color: #9ca3af;
      font-size: 0.85rem;
    }

    .links-items a:hover {
      color: #ffffff;
    }

    .footer-bottom {
      border-top: 1px solid #1f2937;
      padding-top: 20px;
      text-align: center;
      font-size: 0.85rem;
      color: #6b7280;
    }

    /* 悬浮客服面板 */
    .floating-widget {
      position: fixed;
      right: 20px;
      bottom: 30px;
      z-index: 999;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }

    .float-btn {
      width: 48px;
      height: 48px;
      background: var(--vibrant-yellow);
      color: var(--dark-charcoal);
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 800;
      font-size: 0.85rem;
      box-shadow: 0 4px 12px rgba(0,0,0,0.15);
      cursor: pointer;
      border: 2px solid #ffffff;
      transition: transform 0.2s ease;
    }

    .float-btn:hover {
      transform: scale(1.1);
      background: var(--accent-gold);
      color: #ffffff;
    }

    /* 响应式断点 */
    @media (max-width: 1024px) {
      .scenarios-grid, .reviews-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .steps-timeline {
        grid-template-columns: repeat(2, 1fr);
      }
      .metrics-grid {
        grid-template-columns: repeat(2, 1fr);
      }
    }

    @media (max-width: 768px) {
      .nav-links {
        display: none;
      }
      .mobile-menu-btn {
        display: block;
      }
      .main-h1 {
        font-size: 1.85rem;
      }
      .intro-grid, .contact-container, .gallery-grid, .footer-grid {
        grid-template-columns: 1fr;
      }
      .scenarios-grid, .reviews-grid, .steps-timeline {
        grid-template-columns: 1fr;
      }
      .score-rating-box {
        flex-direction: column;
        align-items: flex-start;
      }
    }