:root {
      --bg-base: #f8fafc;
      --bg-card: #ffffff;
      --bg-subtle: #f1f5f9;
      --text-main: #0f172a;
      --text-muted: #475569;
      --text-light: #64748b;
      --primary: #2563eb;
      --primary-hover: #1d4ed8;
      --accent-coral: #ff4757;
      --accent-coral-hover: #e03746;
      --accent-amber: #f59e0b;
      --accent-emerald: #10b981;
      --accent-purple: #8b5cf6;
      --border-color: #e2e8f0;
      --border-bright: #cbd5e1;
      --shadow-sm: 0 2px 8px rgba(15, 23, 42, 0.05);
      --shadow-md: 0 10px 25px -5px rgba(15, 23, 42, 0.08);
      --shadow-lg: 0 20px 35px -10px rgba(37, 99, 235, 0.12);
      --radius-sm: 8px;
      --radius-md: 14px;
      --radius-lg: 20px;
      --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, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      background-color: var(--bg-base);
      color: var(--text-main);
      line-height: 1.65;
      overflow-x: hidden;
      background-image: 
        radial-gradient(at 0% 0%, rgba(37, 99, 235, 0.04) 0px, transparent 50%),
        radial-gradient(at 100% 100%, rgba(255, 71, 87, 0.03) 0px, transparent 50%);
      background-attachment: fixed;
    }

    a {
      text-decoration: none;
      color: inherit;
      transition: var(--transition);
    }

    ul, ol {
      list-style: none;
    }

    .container {
      width: 100%;
      max-width: 1240px;
      margin-left: auto;
      margin-right: auto;
      padding-left: 24px;
      padding-right: 24px;
    }

    /* 顶部导航 */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(255, 255, 255, 0.94);
      backdrop-filter: blur(12px);
      border-bottom: 1px solid var(--border-color);
      box-shadow: 0 2px 10px rgba(0, 0, 0, 0.03);
    }

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

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

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

    .brand-title {
      font-size: 1.35rem;
      font-weight: 800;
      letter-spacing: -0.5px;
      color: var(--text-main);
      display: flex;
      align-items: center;
      gap: 8px;
    }

    .brand-badge {
      font-size: 0.72rem;
      font-weight: 700;
      padding: 3px 8px;
      background: linear-gradient(135deg, #2563eb, #8b5cf6);
      color: #ffffff;
      border-radius: 20px;
      letter-spacing: 0.5px;
    }

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

    .nav-link-item {
      display: inline-block;
      padding: 10px 14px;
      font-size: 0.95rem;
      font-weight: 600;
      color: var(--text-muted);
      border-radius: var(--radius-sm);
      transition: var(--transition);
    }

    .nav-link-item:hover {
      color: var(--primary);
      background: rgba(37, 99, 235, 0.06);
    }

    .ai-page-home-link {
      color: var(--primary) !important;
      font-weight: 700 !important;
    }

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

    .btn-nav-portal {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 10px 20px;
      font-size: 0.92rem;
      font-weight: 700;
      border-radius: 30px;
      background: linear-gradient(135deg, #ff4757, #ff6b81);
      color: #ffffff !important;
      box-shadow: 0 4px 12px rgba(255, 71, 87, 0.35);
      border: 1px solid rgba(255, 255, 255, 0.2);
    }

    .btn-nav-portal:hover {
      transform: translateY(-2px);
      box-shadow: 0 6px 18px rgba(255, 71, 87, 0.45);
    }

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

    /* 首屏 Hero - 无任何图片，纯高饱和撞色排版 */
    .hero-section {
      padding: 64px 0 54px;
      background: linear-gradient(180deg, rgba(238, 242, 255, 0.6) 0%, rgba(248, 250, 252, 0) 100%);
      position: relative;
    }

    .hero-content {
      text-align: center;
      max-width: 980px;
      margin: 0 auto;
    }

    .hero-pill {
      display: inline-flex;
      align-items: center;
      gap: 10px;
      padding: 8px 20px;
      background: #ffffff;
      border: 1px solid rgba(37, 99, 235, 0.2);
      border-radius: 40px;
      font-size: 0.88rem;
      font-weight: 700;
      color: var(--primary);
      box-shadow: var(--shadow-sm);
      margin-bottom: 24px;
    }

    .pill-tag {
      background: #ff4757;
      color: #ffffff;
      font-size: 0.75rem;
      padding: 2px 8px;
      border-radius: 12px;
    }

    .hero-title {
      font-size: 2.85rem;
      font-weight: 900;
      line-height: 1.25;
      color: #0f172a;
      letter-spacing: -1px;
      margin-bottom: 20px;
    }

    .hero-title span {
      background: linear-gradient(120deg, #2563eb 0%, #8b5cf6 50%, #ff4757 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }

    .hero-subtitle {
      font-size: 1.18rem;
      color: var(--text-muted);
      max-width: 820px;
      margin: 0 auto 36px;
      line-height: 1.7;
    }

    .hero-cta-group {
      display: flex;
      align-items: center;
      justify-content: center;
      gap: 16px;
      flex-wrap: wrap;
      margin-bottom: 48px;
    }

    .btn-main-hero {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 10px;
      padding: 16px 36px;
      font-size: 1.1rem;
      font-weight: 800;
      background: linear-gradient(135deg, #ff4757 0%, #ff6b81 100%);
      color: #ffffff !important;
      border-radius: 40px;
      box-shadow: 0 10px 25px rgba(255, 71, 87, 0.4);
      border: 2px solid #ffffff;
      transition: var(--transition);
    }

    .btn-main-hero:hover {
      transform: translateY(-3px) scale(1.02);
      box-shadow: 0 15px 30px rgba(255, 71, 87, 0.5);
    }

    .btn-secondary-hero {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      padding: 16px 32px;
      font-size: 1.05rem;
      font-weight: 700;
      background: #ffffff;
      color: var(--text-main);
      border: 1px solid var(--border-bright);
      border-radius: 40px;
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
    }

    .btn-secondary-hero:hover {
      background: var(--bg-subtle);
      border-color: var(--primary);
      color: var(--primary);
    }

    .hero-stats-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 18px;
      margin-top: 20px;
    }

    .hero-stat-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 22px 16px;
      text-align: center;
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
    }

    .hero-stat-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-md);
      border-color: rgba(37, 99, 235, 0.3);
    }

    .stat-accent-value {
      font-size: 1.85rem;
      font-weight: 900;
      line-height: 1.1;
      margin-bottom: 6px;
    }

    .stat-blue { color: var(--primary); }
    .stat-coral { color: var(--accent-coral); }
    .stat-purple { color: var(--accent-purple); }
    .stat-green { color: var(--accent-emerald); }

    .stat-label {
      font-size: 0.88rem;
      font-weight: 600;
      color: var(--text-muted);
    }

    /* 通用Section布局 */
    .section-block {
      padding: 72px 0;
      position: relative;
    }

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

    .section-header {
      text-align: center;
      max-width: 800px;
      margin: 0 auto 52px;
    }

    .section-tag {
      display: inline-block;
      font-size: 0.82rem;
      font-weight: 800;
      letter-spacing: 1px;
      text-transform: uppercase;
      padding: 4px 14px;
      border-radius: 20px;
      margin-bottom: 12px;
      background: rgba(37, 99, 235, 0.1);
      color: var(--primary);
    }

    .section-tag.coral {
      background: rgba(255, 71, 87, 0.1);
      color: var(--accent-coral);
    }

    .section-tag.purple {
      background: rgba(139, 92, 246, 0.1);
      color: var(--accent-purple);
    }

    .section-title {
      font-size: 2.15rem;
      font-weight: 800;
      color: var(--text-main);
      line-height: 1.35;
      margin-bottom: 14px;
    }

    .section-desc {
      font-size: 1.05rem;
      color: var(--text-muted);
      line-height: 1.7;
    }

    /* 平台介绍 & 关于我们 */
    .about-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 40px;
      align-items: center;
    }

    .about-card-box {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 36px;
      box-shadow: var(--shadow-md);
      position: relative;
      overflow: hidden;
    }

    .about-card-box::before {
      content: "";
      position: absolute;
      top: 0;
      left: 0;
      right: 0;
      height: 6px;
      background: linear-gradient(90deg, #2563eb, #ff4757, #8b5cf6);
    }

    .about-feature-list {
      display: grid;
      grid-template-columns: 1fr;
      gap: 18px;
      margin-top: 24px;
    }

    .about-feature-item {
      display: flex;
      align-items: flex-start;
      gap: 14px;
    }

    .feature-icon-badge {
      width: 36px;
      height: 36px;
      border-radius: 10px;
      background: rgba(37, 99, 235, 0.1);
      color: var(--primary);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 800;
      flex-shrink: 0;
    }

    .feature-text h4 {
      font-size: 1.05rem;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 4px;
    }

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

    /* 模型矩阵标签云 */
    .model-matrix-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 32px;
      box-shadow: var(--shadow-sm);
    }

    .model-badge-cloud {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      margin-top: 18px;
    }

    .model-chip {
      display: inline-flex;
      align-items: center;
      padding: 8px 14px;
      font-size: 0.88rem;
      font-weight: 700;
      border-radius: 8px;
      background: var(--bg-subtle);
      color: var(--text-main);
      border: 1px solid var(--border-color);
      transition: var(--transition);
    }

    .model-chip:hover {
      background: #2563eb;
      color: #ffffff;
      border-color: #2563eb;
      transform: translateY(-2px);
    }

    .model-chip.highlight {
      background: rgba(255, 71, 87, 0.08);
      color: var(--accent-coral);
      border-color: rgba(255, 71, 87, 0.25);
    }

    .model-chip.highlight:hover {
      background: var(--accent-coral);
      color: #ffffff;
    }

    /* 一站式创作场景 Grid */
    .scene-cards-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .scene-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 28px;
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
      transition: var(--transition);
      border-top: 4px solid #2563eb;
    }

    .scene-card:nth-child(2n) {
      border-top-color: #ff4757;
    }

    .scene-card:nth-child(3n) {
      border-top-color: #8b5cf6;
    }

    .scene-card:hover {
      transform: translateY(-5px);
      box-shadow: var(--shadow-lg);
    }

    .scene-card-header {
      display: flex;
      align-items: center;
      justify-content: space-between;
      margin-bottom: 14px;
    }

    .scene-title {
      font-size: 1.2rem;
      font-weight: 800;
      color: var(--text-main);
    }

    .scene-tag-badge {
      font-size: 0.72rem;
      font-weight: 700;
      padding: 3px 8px;
      border-radius: 4px;
      background: var(--bg-subtle);
      color: var(--text-muted);
    }

    .scene-desc {
      font-size: 0.93rem;
      color: var(--text-muted);
      line-height: 1.65;
      margin-bottom: 20px;
    }

    .scene-highlights {
      display: flex;
      flex-wrap: wrap;
      gap: 6px;
    }

    .scene-chip {
      font-size: 0.75rem;
      background: var(--bg-subtle);
      color: var(--text-main);
      padding: 3px 8px;
      border-radius: 4px;
      font-weight: 600;
    }

    /* 行业方案与流程 */
    .industry-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
    }

    .industry-item {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 24px;
      text-align: center;
      transition: var(--transition);
    }

    .industry-item:hover {
      border-color: var(--primary);
      box-shadow: var(--shadow-md);
    }

    .industry-icon-box {
      width: 54px;
      height: 54px;
      margin: 0 auto 16px;
      background: linear-gradient(135deg, rgba(37, 99, 235, 0.1), rgba(255, 71, 87, 0.1));
      border-radius: 14px;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.4rem;
      color: var(--primary);
    }

    .industry-item h3 {
      font-size: 1.1rem;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 8px;
    }

    .industry-item p {
      font-size: 0.88rem;
      color: var(--text-muted);
      line-height: 1.6;
    }

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

    .step-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 26px;
      box-shadow: var(--shadow-sm);
      position: relative;
    }

    .step-num {
      width: 32px;
      height: 32px;
      border-radius: 50%;
      background: var(--primary);
      color: #ffffff;
      font-weight: 800;
      font-size: 0.9rem;
      display: flex;
      align-items: center;
      justify-content: center;
      margin-bottom: 14px;
    }

    .step-card:nth-child(2) .step-num { background: #ff4757; }
    .step-card:nth-child(3) .step-num { background: #8b5cf6; }
    .step-card:nth-child(4) .step-num { background: #10b981; }

    .step-card h3 {
      font-size: 1.08rem;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 8px;
    }

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

    /* 案例展示区 */
    .case-gallery-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .case-card-item {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
      display: flex;
      flex-direction: column;
    }

    .case-card-item:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-md);
    }

    .case-img-wrap {
      width: 100%;
      aspect-ratio: 16 / 10;
      overflow: hidden;
      background: var(--bg-subtle);
    }

    .case-img-wrap.square {
      aspect-ratio: 1 / 1;
    }

    .case-img-wrap img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      display: block;
      transition: transform 0.4s ease;
    }

    .case-card-item:hover .case-img-wrap img {
      transform: scale(1.05);
    }

    .case-body {
      padding: 20px;
      flex-grow: 1;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .case-body h4 {
      font-size: 1.05rem;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 6px;
    }

    .case-body p {
      font-size: 0.88rem;
      color: var(--text-muted);
      line-height: 1.55;
    }

    .banner-promo-row {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 24px;
      margin-top: 36px;
    }

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

    .banner-card img {
      width: 100%;
      height: auto;
      display: block;
    }

    /* 对比评测板块 */
    .compare-box {
      background: #ffffff;
      border: 2px solid rgba(37, 99, 235, 0.2);
      border-radius: var(--radius-lg);
      padding: 36px;
      box-shadow: var(--shadow-lg);
    }

    .rating-banner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      background: linear-gradient(135deg, #0f172a 0%, #1e293b 100%);
      color: #ffffff;
      padding: 24px 32px;
      border-radius: var(--radius-md);
      margin-bottom: 32px;
      flex-wrap: wrap;
      gap: 20px;
    }

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

    .score-big {
      font-size: 2.8rem;
      font-weight: 900;
      color: #f59e0b;
      line-height: 1;
    }

    .rating-meta h4 {
      font-size: 1.25rem;
      font-weight: 800;
      margin-bottom: 4px;
    }

    .rating-stars {
      color: #f59e0b;
      font-size: 1.1rem;
      letter-spacing: 2px;
    }

    .rating-tagline {
      font-size: 0.95rem;
      color: #cbd5e1;
      max-width: 480px;
    }

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

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

    .compare-table th,
    .compare-table td {
      padding: 16px 20px;
      border-bottom: 1px solid var(--border-color);
      font-size: 0.94rem;
    }

    .compare-table th {
      background: var(--bg-subtle);
      font-weight: 700;
      color: var(--text-main);
    }

    .compare-table th.highlight-col,
    .compare-table td.highlight-col {
      background: rgba(37, 99, 235, 0.04);
      font-weight: 700;
      color: var(--primary);
    }

    .check-yes {
      color: #10b981;
      font-weight: 800;
    }

    .check-no {
      color: #94a3b8;
    }

    /* Token 比价与代理 */
    .token-price-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .price-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 32px;
      text-align: center;
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
      position: relative;
    }

    .price-card.featured {
      border: 2px solid #ff4757;
      box-shadow: 0 12px 30px rgba(255, 71, 87, 0.15);
      transform: scale(1.02);
    }

    .featured-badge {
      position: absolute;
      top: -12px;
      left: 50%;
      transform: translateX(-50%);
      background: #ff4757;
      color: #ffffff;
      padding: 4px 16px;
      border-radius: 20px;
      font-size: 0.78rem;
      font-weight: 800;
      letter-spacing: 0.5px;
    }

    .price-card h3 {
      font-size: 1.25rem;
      font-weight: 800;
      color: var(--text-main);
      margin-bottom: 12px;
    }

    .price-value {
      font-size: 2.3rem;
      font-weight: 900;
      color: var(--text-main);
      margin-bottom: 8px;
    }

    .price-unit {
      font-size: 0.88rem;
      color: var(--text-muted);
      font-weight: normal;
    }

    .price-features {
      margin: 24px 0;
      text-align: left;
    }

    .price-features li {
      padding: 8px 0;
      font-size: 0.9rem;
      color: var(--text-muted);
      border-bottom: 1px dashed var(--border-color);
    }

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

    .testimonial-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 26px;
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
      transition: var(--transition);
    }

    .testimonial-card:hover {
      box-shadow: var(--shadow-md);
      border-color: rgba(37, 99, 235, 0.3);
    }

    .quote-content {
      font-size: 0.94rem;
      color: var(--text-muted);
      line-height: 1.65;
      margin-bottom: 20px;
      font-style: italic;
    }

    .user-profile {
      display: flex;
      align-items: center;
      gap: 12px;
      border-top: 1px solid var(--border-color);
      padding-top: 14px;
    }

    .avatar-icon {
      width: 42px;
      height: 42px;
      border-radius: 50%;
      background: linear-gradient(135deg, #2563eb, #8b5cf6);
      color: #ffffff;
      font-weight: 800;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1rem;
    }

    .user-info h5 {
      font-size: 0.95rem;
      font-weight: 700;
      color: var(--text-main);
    }

    .user-info span {
      font-size: 0.82rem;
      color: var(--text-light);
    }

    /* 表单与需求匹配 */
    .form-section-wrapper {
      display: grid;
      grid-template-columns: 1fr 1.2fr;
      gap: 36px;
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 40px;
      box-shadow: var(--shadow-md);
    }

    .form-info-side {
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .contact-info-list {
      margin-top: 24px;
    }

    .contact-info-item {
      display: flex;
      align-items: center;
      gap: 12px;
      padding: 10px 0;
      font-size: 0.95rem;
      color: var(--text-muted);
    }

    .custom-form {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 18px;
    }

    .form-group-full {
      grid-column: span 2;
    }

    .form-label {
      display: block;
      font-size: 0.88rem;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 6px;
    }

    .form-input,
    .form-select,
    .form-textarea {
      width: 100%;
      padding: 12px 16px;
      border: 1px solid var(--border-bright);
      border-radius: var(--radius-sm);
      font-size: 0.92rem;
      color: var(--text-main);
      background: #ffffff;
      transition: var(--transition);
      font-family: inherit;
    }

    .form-input:focus,
    .form-select:focus,
    .form-textarea:focus {
      outline: none;
      border-color: var(--primary);
      box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.15);
    }

    .form-textarea {
      resize: vertical;
      min-height: 100px;
    }

    .btn-form-submit {
      grid-column: span 2;
      padding: 14px 28px;
      font-size: 1rem;
      font-weight: 800;
      background: linear-gradient(135deg, #2563eb, #1d4ed8);
      color: #ffffff;
      border: none;
      border-radius: var(--radius-sm);
      cursor: pointer;
      transition: var(--transition);
      box-shadow: 0 4px 12px rgba(37, 99, 235, 0.3);
    }

    .btn-form-submit:hover {
      background: linear-gradient(135deg, #1d4ed8, #1e40af);
      transform: translateY(-2px);
    }

    /* FAQ 手风琴 */
    .faq-accordion-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 18px;
    }

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

    .faq-question {
      padding: 18px 22px;
      font-size: 1rem;
      font-weight: 700;
      color: var(--text-main);
      display: flex;
      align-items: center;
      justify-content: space-between;
      cursor: pointer;
      user-select: none;
    }

    .faq-question:hover {
      color: var(--primary);
    }

    .faq-toggle-icon {
      font-size: 1.2rem;
      font-weight: 700;
      color: var(--primary);
      transition: transform 0.25s ease;
    }

    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s ease, padding 0.3s ease;
      background: var(--bg-subtle);
      padding: 0 22px;
      font-size: 0.92rem;
      color: var(--text-muted);
      line-height: 1.65;
    }

    .faq-item.active .faq-answer {
      max-height: 300px;
      padding: 16px 22px 20px;
      border-top: 1px solid var(--border-color);
    }

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

    /* 行业资讯 & AI百科 */
    .article-links-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 28px;
      box-shadow: var(--shadow-sm);
    }

    .article-row-list {
      display: flex;
      flex-direction: column;
      gap: 12px;
      margin-top: 16px;
    }

    .article-item-link {
      display: flex;
      align-items: center;
      justify-content: space-between;
      padding: 12px 16px;
      background: var(--bg-subtle);
      border-radius: var(--radius-sm);
      font-size: 0.92rem;
      color: var(--text-main);
      font-weight: 600;
      transition: var(--transition);
    }

    .article-item-link:hover {
      background: rgba(37, 99, 235, 0.08);
      color: var(--primary);
      transform: translateX(4px);
    }

    /* 页脚与友情链接 */
    .site-footer {
      background: #0f172a;
      color: #94a3b8;
      padding: 60px 0 30px;
      border-top: 1px solid #1e293b;
    }

    .footer-grid {
      display: grid;
      grid-template-columns: 1.5fr 1fr 1fr 1fr;
      gap: 36px;
      margin-bottom: 40px;
    }

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

    .footer-brand p {
      font-size: 0.9rem;
      line-height: 1.65;
      color: #94a3b8;
      margin-bottom: 16px;
    }

    .footer-col h5 {
      font-size: 1.05rem;
      font-weight: 700;
      color: #ffffff;
      margin-bottom: 16px;
    }

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

    .footer-links-list a {
      color: #94a3b8;
      font-size: 0.9rem;
    }

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

    .qrcode-box {
      background: #ffffff;
      padding: 8px;
      border-radius: 8px;
      display: inline-block;
      max-width: 110px;
    }

    .qrcode-box img {
      width: 100%;
      height: auto;
      display: block;
    }

    .footer-bottom {
      border-top: 1px solid #1e293b;
      padding-top: 24px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      flex-wrap: wrap;
      gap: 16px;
      font-size: 0.86rem;
      color: #64748b;
    }

    .friend-links-bar {
      display: flex;
      flex-wrap: wrap;
      align-items: center;
      gap: 12px;
      margin-bottom: 20px;
      padding-bottom: 20px;
      border-bottom: 1px solid #1e293b;
    }

    .friend-links-bar span {
      color: #ffffff;
      font-weight: 700;
      font-size: 0.88rem;
    }

    .friend-links-bar a {
      color: #94a3b8;
      font-size: 0.86rem;
    }

    .friend-links-bar a:hover {
      color: #38bdf8;
    }

    /* 浮动工具栏 */
    .floating-tools {
      position: fixed;
      right: 20px;
      bottom: 30px;
      z-index: 999;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }

    .tool-btn {
      width: 46px;
      height: 46px;
      border-radius: 50%;
      background: #ffffff;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-md);
      display: flex;
      align-items: center;
      justify-content: center;
      color: var(--text-main);
      cursor: pointer;
      font-size: 1.1rem;
      transition: var(--transition);
      position: relative;
    }

    .tool-btn:hover {
      background: var(--primary);
      color: #ffffff;
      transform: translateY(-2px);
    }

    .tool-qr-popup {
      position: absolute;
      right: 56px;
      bottom: 0;
      background: #ffffff;
      padding: 12px;
      border-radius: var(--radius-md);
      box-shadow: var(--shadow-lg);
      border: 1px solid var(--border-color);
      display: none;
      width: 140px;
      text-align: center;
    }

    .tool-qr-popup img {
      width: 100%;
      height: auto;
      display: block;
      margin-bottom: 6px;
    }

    .tool-qr-popup span {
      font-size: 0.75rem;
      color: var(--text-muted);
      font-weight: 600;
    }

    .tool-btn:hover .tool-qr-popup {
      display: block;
    }

    /* 响应式调整 */
    @media (max-width: 1024px) {
      .scene-cards-grid,
      .testimonials-grid,
      .token-price-grid,
      .case-gallery-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .hero-stats-grid,
      .industry-grid,
      .process-steps-row {
        grid-template-columns: repeat(2, 1fr);
      }
      .footer-grid {
        grid-template-columns: 1fr 1fr;
      }
    }

    @media (max-width: 768px) {
      .nav-links {
        display: none;
        position: absolute;
        top: 76px;
        left: 0;
        right: 0;
        background: #ffffff;
        flex-direction: column;
        padding: 16px;
        border-bottom: 1px solid var(--border-color);
        box-shadow: var(--shadow-md);
      }
      .nav-links.active {
        display: flex;
      }
      .nav-link-item {
        width: 100%;
        text-align: left;
        padding: 12px;
      }
      .mobile-menu-btn {
        display: block;
      }
      .hero-title {
        font-size: 2rem;
      }
      .hero-stats-grid,
      .scene-cards-grid,
      .industry-grid,
      .process-steps-row,
      .case-gallery-grid,
      .token-price-grid,
      .testimonials-grid,
      .faq-accordion-grid,
      .about-grid,
      .form-section-wrapper,
      .banner-promo-row {
        grid-template-columns: 1fr;
      }
      .form-section-wrapper {
        padding: 24px;
      }
      .custom-form {
        grid-template-columns: 1fr;
      }
      .form-group-full {
        grid-column: span 1;
      }
      .footer-grid {
        grid-template-columns: 1fr;
      }
    }