:root {
      --primary: #4f46e5;
      --primary-hover: #4338ca;
      --accent: #ff4757;
      --accent-alt: #00d2d3;
      --warning: #ff9f43;
      --bg-page: #f8fafc;
      --bg-card: #ffffff;
      --text-main: #0f172a;
      --text-muted: #475569;
      --text-light: #64748b;
      --border-color: #e2e8f0;
      --border-highlight: #cbd5e1;
      --shadow-sm: 0 2px 4px rgba(15, 23, 42, 0.05);
      --shadow-md: 0 10px 25px -5px rgba(79, 70, 229, 0.08), 0 8px 10px -6px rgba(15, 23, 42, 0.04);
      --shadow-lg: 0 20px 30px -10px rgba(15, 23, 42, 0.1);
      --radius: 14px;
      --transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
    }

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

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

    body {
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Microsoft YaHei", sans-serif;
      background-color: var(--bg-page);
      color: var(--text-main);
      line-height: 1.6;
      overflow-x: hidden;
    }

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

    .container {
      max-width: 1240px;
      margin-left: auto;
      margin-right: auto;
      padding-left: 20px;
      padding-right: 20px;
      width: 100%;
    }

    /* 顶部导航 */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(255, 255, 255, 0.95);
      backdrop-filter: blur(12px);
      border-bottom: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
    }

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

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

    .ai-page-logo {
      height: 40px;
      width: auto;
      display: block;
      object-fit: contain;
    }

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

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

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

    .nav-links a {
      font-size: 0.95rem;
      font-weight: 600;
      color: var(--text-muted);
      padding: 8px 14px;
      border-radius: 8px;
    }

    .nav-links a:hover {
      color: var(--primary);
      background-color: #f1f5f9;
    }

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

    .btn-nav {
      background: linear-gradient(135deg, var(--accent) 0%, #ff6b81 100%);
      color: #ffffff !important;
      padding: 9px 20px;
      font-size: 0.9rem;
      font-weight: 700;
      border-radius: 30px;
      box-shadow: 0 4px 12px rgba(255, 71, 87, 0.3);
    }

    .btn-nav:hover {
      transform: translateY(-2px);
      box-shadow: 0 6px 16px rgba(255, 71, 87, 0.4);
    }

    .mobile-menu-btn {
      display: none;
      background: none;
      border: 1px solid var(--border-color);
      padding: 8px;
      border-radius: 6px;
      cursor: pointer;
    }

    .mobile-menu-btn svg {
      width: 24px;
      height: 24px;
      stroke: var(--text-main);
    }

    /* 视觉首屏 (无任何图片) */
    .hero-section {
      background: linear-gradient(135deg, #eef2ff 0%, #fff1f2 50%, #f0fdfa 100%);
      padding: 80px 0 60px;
      border-bottom: 1px solid var(--border-color);
      position: relative;
      overflow: hidden;
    }

    .hero-wrapper {
      display: grid;
      grid-template-columns: 1.2fr 0.8fr;
      gap: 40px;
      align-items: center;
    }

    .hero-badge {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      background: #ffffff;
      border: 2px solid #ff4757;
      color: #ff4757;
      padding: 6px 16px;
      border-radius: 30px;
      font-size: 0.875rem;
      font-weight: 800;
      margin-bottom: 20px;
      box-shadow: var(--shadow-sm);
    }

    .hero-title {
      font-size: 2.75rem;
      line-height: 1.25;
      font-weight: 900;
      color: var(--text-main);
      margin-bottom: 20px;
      letter-spacing: -1px;
    }

    .hero-title .highlight-accent {
      color: var(--primary);
      text-decoration: underline;
      text-decoration-color: var(--accent);
      text-decoration-thickness: 6px;
      text-underline-offset: 6px;
    }

    .hero-desc {
      font-size: 1.125rem;
      color: var(--text-muted);
      line-height: 1.8;
      margin-bottom: 36px;
    }

    .hero-ctas {
      display: flex;
      flex-wrap: wrap;
      align-items: center;
      gap: 16px;
      margin-bottom: 30px;
    }

    .btn-main-action {
      background: linear-gradient(135deg, var(--accent) 0%, #e84118 100%);
      color: #ffffff;
      font-size: 1.15rem;
      font-weight: 800;
      padding: 16px 36px;
      border-radius: 40px;
      box-shadow: 0 10px 24px rgba(255, 71, 87, 0.4);
      display: inline-flex;
      align-items: center;
      gap: 10px;
    }

    .btn-main-action:hover {
      transform: translateY(-3px) scale(1.02);
      box-shadow: 0 14px 28px rgba(255, 71, 87, 0.5);
    }

    .btn-secondary-action {
      background: #ffffff;
      color: var(--primary);
      font-size: 1.05rem;
      font-weight: 700;
      padding: 16px 28px;
      border-radius: 40px;
      border: 2px solid var(--primary);
      box-shadow: var(--shadow-sm);
    }

    .btn-secondary-action:hover {
      background: #eef2ff;
      color: var(--primary-hover);
    }

    .hero-stats-banner {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 16px;
      background: #ffffff;
      padding: 24px;
      border-radius: var(--radius);
      border: 2px solid var(--border-color);
      box-shadow: var(--shadow-md);
    }

    .hero-stat-item {
      text-align: center;
    }

    .hero-stat-num {
      font-size: 1.85rem;
      font-weight: 900;
      color: var(--primary);
      line-height: 1.2;
    }

    .hero-stat-label {
      font-size: 0.85rem;
      color: var(--text-light);
      margin-top: 4px;
      font-weight: 600;
    }

    .hero-model-board {
      background: #ffffff;
      border: 2px solid #00d2d3;
      border-radius: 20px;
      padding: 28px;
      box-shadow: var(--shadow-lg);
      position: relative;
    }

    .board-header {
      font-weight: 800;
      font-size: 1.1rem;
      margin-bottom: 16px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      color: var(--text-main);
    }

    .board-tag {
      background: #e0f2fe;
      color: #0284c7;
      font-size: 0.75rem;
      padding: 4px 10px;
      border-radius: 20px;
      font-weight: 700;
    }

    .model-pills {
      display: flex;
      flex-wrap: wrap;
      gap: 8px;
      margin-bottom: 20px;
    }

    .model-pill {
      font-size: 0.8rem;
      font-weight: 700;
      background: #f8fafc;
      border: 1px solid var(--border-color);
      padding: 6px 12px;
      border-radius: 8px;
      color: var(--text-muted);
    }

    .model-pill.active {
      background: #eff6ff;
      border-color: #3b82f6;
      color: #1d4ed8;
    }

    .model-summary-box {
      background: #fdf2f8;
      border-left: 4px solid var(--accent);
      padding: 14px;
      border-radius: 6px;
      font-size: 0.875rem;
      color: #831843;
      line-height: 1.6;
    }

    /* 通用版块标题 */
    .section-wrap {
      padding: 70px 0;
      border-bottom: 1px solid var(--border-color);
    }

    .section-head {
      text-align: center;
      max-width: 800px;
      margin: 0 auto 50px;
    }

    .section-tagline {
      display: inline-block;
      text-transform: uppercase;
      font-size: 0.825rem;
      font-weight: 800;
      letter-spacing: 1px;
      color: var(--accent);
      background: #ffe4e6;
      padding: 4px 14px;
      border-radius: 30px;
      margin-bottom: 12px;
    }

    .section-title {
      font-size: 2.1rem;
      font-weight: 800;
      color: var(--text-main);
      line-height: 1.3;
      margin-bottom: 14px;
    }

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

    /* 卡片网格体系 */
    .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;
    }

    /* 服务能力卡片 */
    .feature-card {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      padding: 28px;
      transition: var(--transition);
      display: flex;
      flex-direction: column;
      height: 100%;
      box-shadow: var(--shadow-sm);
    }

    .feature-card:hover {
      transform: translateY(-6px);
      box-shadow: var(--shadow-md);
      border-color: var(--primary);
    }

    .card-badge-row {
      display: flex;
      justify-content: space-between;
      align-items: center;
      margin-bottom: 18px;
    }

    .card-ico-box {
      width: 48px;
      height: 48px;
      border-radius: 12px;
      background: #eff6ff;
      color: var(--primary);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 900;
      font-size: 1.25rem;
    }

    .card-status {
      font-size: 0.75rem;
      font-weight: 700;
      background: #ecfdf5;
      color: #059669;
      padding: 3px 8px;
      border-radius: 6px;
    }

    .feature-card h3 {
      font-size: 1.25rem;
      font-weight: 700;
      margin-bottom: 12px;
      color: var(--text-main);
    }

    .feature-card p {
      font-size: 0.925rem;
      color: var(--text-muted);
      line-height: 1.7;
      margin-bottom: 16px;
      flex-grow: 1;
    }

    .feature-tag-list {
      display: flex;
      flex-wrap: wrap;
      gap: 6px;
    }

    .feature-tag-list span {
      font-size: 0.75rem;
      background: #f1f5f9;
      color: var(--text-light);
      padding: 3px 8px;
      border-radius: 4px;
    }

    /* 一站式创作场景模块 (包含图文素材展示) */
    .scenario-item {
      background: #ffffff;
      border-radius: var(--radius);
      border: 1px solid var(--border-color);
      overflow: hidden;
      display: flex;
      flex-direction: column;
    }

    .scenario-img-box {
      width: 100%;
      aspect-ratio: 16 / 9;
      overflow: hidden;
      background: #e2e8f0;
    }

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

    .scenario-item:hover .scenario-img-box img {
      transform: scale(1.05);
    }

    .scenario-body {
      padding: 24px;
      display: flex;
      flex-direction: column;
      flex-grow: 1;
    }

    .scenario-body h3 {
      font-size: 1.2rem;
      font-weight: 800;
      margin-bottom: 10px;
    }

    .scenario-body p {
      font-size: 0.9rem;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* 对比评测表格 */
    .review-score-hero {
      background: linear-gradient(135deg, #1e1b4b 0%, #312e81 100%);
      color: #ffffff;
      padding: 36px;
      border-radius: var(--radius);
      display: flex;
      align-items: center;
      justify-content: space-between;
      margin-bottom: 36px;
      flex-wrap: wrap;
      gap: 24px;
    }

    .review-score-badge {
      display: flex;
      align-items: baseline;
      gap: 12px;
    }

    .score-big {
      font-size: 4rem;
      font-weight: 900;
      color: #38bdf8;
      line-height: 1;
    }

    .score-total {
      font-size: 1.5rem;
      color: #94a3b8;
    }

    .score-stars {
      color: #facc15;
      font-size: 1.6rem;
      letter-spacing: 4px;
    }

    .compare-table-wrapper {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      overflow-x: auto;
      box-shadow: var(--shadow-sm);
    }

    .compare-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
      font-size: 0.95rem;
    }

    .compare-table th, .compare-table td {
      padding: 18px 20px;
      border-bottom: 1px solid var(--border-color);
    }

    .compare-table th {
      background-color: #f8fafc;
      font-weight: 800;
      color: var(--text-main);
    }

    .compare-table tr:hover td {
      background-color: #fcf8ff;
    }

    .col-highlight {
      background-color: #f5f3ff;
      font-weight: 700;
      color: var(--primary);
    }

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

    .process-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-top: 4px solid var(--accent);
      border-radius: var(--radius);
      padding: 24px;
      text-align: left;
    }

    .process-num {
      font-size: 2rem;
      font-weight: 900;
      color: var(--accent);
      opacity: 0.8;
      margin-bottom: 12px;
    }

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

    .process-card p {
      font-size: 0.875rem;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* Token比价模块 */
    .token-table-wrap {
      background: #ffffff;
      border: 2px solid var(--border-color);
      border-radius: var(--radius);
      overflow: hidden;
      box-shadow: var(--shadow-md);
    }

    .token-grid-head {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1.5fr;
      padding: 16px 24px;
      background: #0f172a;
      color: #ffffff;
      font-weight: 700;
    }

    .token-grid-row {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1.5fr;
      padding: 18px 24px;
      border-bottom: 1px solid var(--border-color);
      align-items: center;
      font-size: 0.95rem;
    }

    .token-grid-row:nth-child(even) {
      background: #f8fafc;
    }

    .tag-save {
      background: #fee2e2;
      color: #dc2626;
      padding: 4px 10px;
      border-radius: 20px;
      font-weight: 800;
      font-size: 0.8rem;
      display: inline-block;
    }

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

    .testimonial-quote {
      font-size: 0.95rem;
      color: var(--text-muted);
      line-height: 1.7;
      margin-bottom: 20px;
      position: relative;
    }

    .testimonial-user {
      display: flex;
      align-items: center;
      gap: 14px;
      border-top: 1px solid #f1f5f9;
      padding-top: 16px;
    }

    .avatar-initial {
      width: 44px;
      height: 44px;
      border-radius: 50%;
      background: var(--primary);
      color: #ffffff;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 800;
      font-size: 1rem;
    }

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

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

    /* FAQ 手风琴 */
    .faq-container {
      max-width: 900px;
      margin: 0 auto;
    }

    .faq-item {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: 10px;
      margin-bottom: 14px;
      overflow: hidden;
      transition: var(--transition);
    }

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

    .faq-question {
      width: 100%;
      padding: 20px 24px;
      text-align: left;
      background: none;
      border: none;
      outline: none;
      display: flex;
      justify-content: space-between;
      align-items: center;
      font-size: 1.05rem;
      font-weight: 700;
      color: var(--text-main);
      cursor: pointer;
    }

    .faq-icon {
      font-size: 1.3rem;
      color: var(--primary);
      transition: transform 0.25s ease;
    }

    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s ease-out;
      background-color: #f8fafc;
    }

    .faq-answer-inner {
      padding: 0 24px 20px;
      font-size: 0.95rem;
      color: var(--text-muted);
      line-height: 1.7;
    }

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

    /* 最新文章与资讯 */
    .articles-list {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .article-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      padding: 22px;
      transition: var(--transition);
    }

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

    .article-card h4 {
      font-size: 1.05rem;
      font-weight: 700;
      margin-bottom: 10px;
      color: var(--text-main);
    }

    .article-link {
      font-size: 0.85rem;
      color: var(--primary);
      font-weight: 700;
      display: inline-flex;
      align-items: center;
      gap: 4px;
      word-break: break-all;
    }

    /* 需求表单模块 */
    .form-wrapper {
      background: #ffffff;
      border: 2px solid var(--primary);
      border-radius: 20px;
      padding: 40px;
      box-shadow: var(--shadow-lg);
    }

    .form-grid {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 20px;
    }

    .form-group {
      display: flex;
      flex-direction: column;
      gap: 8px;
    }

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

    .form-group label {
      font-size: 0.9rem;
      font-weight: 700;
      color: var(--text-main);
    }

    .form-control {
      width: 100%;
      padding: 12px 16px;
      border: 1px solid var(--border-color);
      border-radius: 8px;
      font-size: 0.95rem;
      outline: none;
      transition: var(--transition);
      background: #f8fafc;
    }

    .form-control:focus {
      border-color: var(--primary);
      background: #ffffff;
      box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.1);
    }

    .btn-submit {
      background: linear-gradient(135deg, var(--primary) 0%, #3730a3 100%);
      color: #ffffff;
      font-size: 1.05rem;
      font-weight: 700;
      padding: 14px 28px;
      border: none;
      border-radius: 8px;
      cursor: pointer;
      width: 100%;
      transition: var(--transition);
    }

    .btn-submit:hover {
      opacity: 0.95;
      transform: translateY(-2px);
    }

    /* 浮动客服组件 */
    .floating-kefu {
      position: fixed;
      right: 24px;
      bottom: 30px;
      z-index: 999;
      display: flex;
      flex-direction: column;
      gap: 12px;
    }

    .kefu-trigger {
      width: 54px;
      height: 54px;
      border-radius: 50%;
      background: linear-gradient(135deg, var(--accent) 0%, #ff6b81 100%);
      color: #ffffff;
      display: flex;
      align-items: center;
      justify-content: center;
      box-shadow: 0 8px 20px rgba(255, 71, 87, 0.4);
      cursor: pointer;
      transition: var(--transition);
    }

    .kefu-trigger:hover {
      transform: scale(1.08);
    }

    .kefu-popover {
      position: absolute;
      bottom: 64px;
      right: 0;
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: 12px;
      padding: 16px;
      width: 220px;
      box-shadow: var(--shadow-lg);
      text-align: center;
      display: none;
    }

    .floating-kefu:hover .kefu-popover {
      display: block;
    }

    .kefu-popover img {
      width: 140px;
      height: 140px;
      display: block;
      margin: 0 auto 10px;
      border-radius: 8px;
    }

    /* 统一页脚 */
    .site-footer {
      background-color: #0b0f19;
      color: #94a3b8;
      padding: 60px 0 30px;
      font-size: 0.9rem;
    }

    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1.5fr;
      gap: 40px;
      margin-bottom: 40px;
    }

    .footer-brand h4 {
      color: #ffffff;
      font-size: 1.3rem;
      font-weight: 800;
      margin-bottom: 14px;
    }

    .footer-brand p {
      line-height: 1.7;
      margin-bottom: 16px;
    }

    .footer-col h5 {
      color: #ffffff;
      font-size: 1rem;
      font-weight: 700;
      margin-bottom: 18px;
    }

    .footer-links {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }

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

    .friend-links-box {
      border-top: 1px solid #1e293b;
      padding-top: 24px;
      margin-top: 24px;
      display: flex;
      flex-wrap: wrap;
      gap: 16px;
      align-items: center;
    }

    .friend-links-box span {
      color: #ffffff;
      font-weight: 700;
    }

    .friend-links-box a {
      color: #64748b;
    }

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

    .footer-bottom {
      border-top: 1px solid #1e293b;
      padding-top: 24px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      flex-wrap: wrap;
      gap: 12px;
      color: #64748b;
      font-size: 0.85rem;
    }

    /* 响应式断点控制 */
    @media (max-width: 1024px) {
      .hero-wrapper {
        grid-template-columns: 1fr;
      }
      .grid-3 {
        grid-template-columns: repeat(2, 1fr);
      }
      .grid-4 {
        grid-template-columns: repeat(2, 1fr);
      }
      .process-steps {
        grid-template-columns: repeat(2, 1fr);
      }
      .footer-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .articles-list {
        grid-template-columns: repeat(2, 1fr);
      }
    }

    @media (max-width: 768px) {
      .hero-title {
        font-size: 2rem;
      }
      .nav-links {
        display: none;
        position: absolute;
        top: 72px;
        left: 0;
        width: 100%;
        background: #ffffff;
        flex-direction: column;
        padding: 20px;
        border-bottom: 1px solid var(--border-color);
        box-shadow: var(--shadow-md);
      }
      .nav-links.show {
        display: flex;
      }
      .mobile-menu-btn {
        display: block;
      }
      .grid-3, .grid-4, .grid-2, .articles-list {
        grid-template-columns: 1fr;
      }
      .process-steps {
        grid-template-columns: 1fr;
      }
      .form-grid {
        grid-template-columns: 1fr;
      }
      .form-group.full {
        grid-column: span 1;
      }
      .footer-grid {
        grid-template-columns: 1fr;
      }
      .hero-stats-banner {
        grid-template-columns: 1fr;
      }
      .review-score-hero {
        flex-direction: column;
        align-items: flex-start;
      }
      .token-grid-head, .token-grid-row {
        grid-template-columns: 1.5fr 1fr 1fr;
      }
      .token-grid-head div:last-child, .token-grid-row div:last-child {
        display: none;
      }
    }