:root {
      --primary: #FF4D00;
      --primary-hover: #E04400;
      --accent-blue: #0A58CA;
      --accent-cyan: #00D2D3;
      --accent-yellow: #FFD100;
      --dark-text: #1E293B;
      --body-text: #334155;
      --muted-text: #64748B;
      --bg-light: #F8FAFC;
      --bg-white: #FFFFFF;
      --bg-card: #FFFFFF;
      --border-color: #E2E8F0;
      --shadow-sm: 0 2px 4px rgba(0,0,0,0.04);
      --shadow-md: 0 10px 25px -5px rgba(0,0,0,0.06), 0 8px 10px -6px rgba(0,0,0,0.04);
      --shadow-lg: 0 20px 30px -10px rgba(0,0,0,0.08);
      --radius: 12px;
    }

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

    html {
      scroll-behavior: smooth;
    }

    body {
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
      background-color: var(--bg-light);
      color: var(--body-text);
      line-height: 1.6;
      font-size: 16px;
      overflow-x: hidden;
    }

    .container {
      width: 100%;
      max-width: 1200px;
      margin-left: auto;
      margin-right: auto;
      padding-left: 20px;
      padding-right: 20px;
    }

    /* 顶部导航 */
    header.site-header {
      background: var(--bg-white);
      border-bottom: 2px solid var(--border-color);
      position: sticky;
      top: 0;
      z-index: 1000;
      box-shadow: var(--shadow-sm);
    }

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

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

    .brand-logo img {
      max-height: 42px;
      width: auto;
      display: block;
    }

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

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

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

    .nav-links a {
      color: var(--dark-text);
      text-decoration: none;
      font-weight: 600;
      font-size: 0.95rem;
      padding: 8px 12px;
      border-radius: 6px;
      transition: all 0.2s ease;
    }

    .nav-links a:hover {
      color: var(--primary);
      background-color: #FFF5F0;
    }

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

    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 10px 22px;
      font-size: 0.95rem;
      font-weight: 700;
      border-radius: 8px;
      text-decoration: none;
      cursor: pointer;
      border: 2px solid transparent;
      transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    }

    .btn-primary {
      background-color: var(--primary);
      color: #FFFFFF;
      box-shadow: 0 4px 14px rgba(255, 77, 0, 0.3);
    }

    .btn-primary:hover {
      background-color: var(--primary-hover);
      transform: translateY(-2px);
      box-shadow: 0 6px 18px rgba(255, 77, 0, 0.4);
    }

    .btn-accent {
      background-color: var(--accent-blue);
      color: #FFFFFF;
    }

    .btn-accent:hover {
      background-color: #084298;
      transform: translateY(-2px);
    }

    .btn-outline {
      border-color: var(--dark-text);
      color: var(--dark-text);
      background: transparent;
    }

    .btn-outline:hover {
      background-color: var(--dark-text);
      color: #FFFFFF;
    }

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

    /* 首屏 Hero */
    .hero-section {
      background: linear-gradient(135deg, #FFF8F5 0%, #FFFFFF 50%, #F0F7FF 100%);
      padding: 80px 0 60px;
      position: relative;
      border-bottom: 1px solid var(--border-color);
    }

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

    .hero-tag {
      display: inline-block;
      padding: 6px 14px;
      background: #FFE8DE;
      color: var(--primary);
      font-weight: 700;
      font-size: 0.85rem;
      border-radius: 20px;
      margin-bottom: 20px;
      border: 1px solid rgba(255, 77, 0, 0.2);
    }

    .hero-title {
      font-size: 2.75rem;
      font-weight: 900;
      line-height: 1.2;
      color: var(--dark-text);
      margin-bottom: 20px;
      letter-spacing: -1px;
    }

    .hero-title mark {
      background: linear-gradient(120deg, #FFD100 0%, #FFD100 100%);
      background-repeat: no-repeat;
      background-size: 100% 35%;
      background-position: 0 88%;
      color: inherit;
    }

    .hero-desc {
      font-size: 1.15rem;
      color: var(--muted-text);
      margin-bottom: 30px;
      max-width: 580px;
    }

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

    .hero-features {
      display: flex;
      gap: 20px;
      font-size: 0.9rem;
      color: var(--dark-text);
      font-weight: 600;
    }

    .hero-features span {
      display: inline-flex;
      align-items: center;
      gap: 6px;
    }

    .hero-features span::before {
      content: "✓";
      color: #10B981;
      font-weight: 900;
    }

    .hero-card-panel {
      background: var(--bg-white);
      border: 2px solid var(--dark-text);
      border-radius: var(--radius);
      padding: 30px;
      box-shadow: 8px 8px 0px var(--dark-text);
      position: relative;
    }

    .hero-card-header {
      display: flex;
      justify-content: space-between;
      align-items: center;
      border-bottom: 2px solid var(--border-color);
      padding-bottom: 15px;
      margin-bottom: 20px;
    }

    .hero-badge {
      background: var(--accent-yellow);
      color: var(--dark-text);
      font-weight: 800;
      padding: 4px 10px;
      font-size: 0.8rem;
      border-radius: 4px;
      border: 1px solid var(--dark-text);
    }

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

    .model-chip {
      background: #F1F5F9;
      color: var(--dark-text);
      padding: 4px 10px;
      border-radius: 6px;
      font-size: 0.8rem;
      font-weight: 600;
      border: 1px solid var(--border-color);
    }

    .hero-stats-grid {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 12px;
    }

    .stat-box {
      background: #F8FAFC;
      padding: 12px;
      border-radius: 8px;
      border-left: 4px solid var(--primary);
    }

    .stat-num {
      font-size: 1.4rem;
      font-weight: 800;
      color: var(--dark-text);
    }

    .stat-lab {
      font-size: 0.75rem;
      color: var(--muted-text);
    }

    /* 通用Section */
    section.page-section {
      padding: 70px 0;
      border-bottom: 1px solid var(--border-color);
    }

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

    .section-subtitle {
      color: var(--primary);
      font-size: 0.9rem;
      font-weight: 800;
      text-transform: uppercase;
      letter-spacing: 1px;
      margin-bottom: 8px;
      display: block;
    }

    .section-title {
      font-size: 2.2rem;
      font-weight: 800;
      color: var(--dark-text);
      margin-bottom: 14px;
      letter-spacing: -0.5px;
    }

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

    /* 网格布局 */
    .grid-3 {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

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

    .grid-2 {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 30px;
    }

    /* 卡片通用 */
    .feature-card {
      background: var(--bg-white);
      border: 2px solid var(--border-color);
      border-radius: var(--radius);
      padding: 28px;
      transition: all 0.25s ease;
      display: flex;
      flex-direction: column;
      height: 100%;
    }

    .feature-card:hover {
      transform: translateY(-4px);
      border-color: var(--dark-text);
      box-shadow: 6px 6px 0px var(--dark-text);
    }

    .card-icon {
      width: 48px;
      height: 48px;
      background: #FFF0E6;
      color: var(--primary);
      border-radius: 10px;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.4rem;
      font-weight: bold;
      margin-bottom: 18px;
      border: 1px solid rgba(255, 77, 0, 0.2);
    }

    .card-title {
      font-size: 1.25rem;
      font-weight: 700;
      color: var(--dark-text);
      margin-bottom: 10px;
    }

    .card-text {
      font-size: 0.95rem;
      color: var(--muted-text);
      flex-grow: 1;
      line-height: 1.6;
    }

    /* 平台支持模型矩阵 */
    .model-matrix {
      background: #FFFFFF;
      border: 2px solid var(--border-color);
      border-radius: var(--radius);
      padding: 24px;
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      justify-content: center;
      margin-top: 30px;
    }

    .matrix-item {
      padding: 8px 16px;
      background: #F8FAFC;
      border: 1px solid var(--border-color);
      border-radius: 8px;
      font-size: 0.9rem;
      font-weight: 700;
      color: var(--dark-text);
      transition: all 0.2s ease;
    }

    .matrix-item:hover {
      background: var(--primary);
      color: #FFFFFF;
      border-color: var(--primary);
    }

    /* 媒体与案例展示 */
    .case-card {
      background: var(--bg-white);
      border-radius: var(--radius);
      overflow: hidden;
      border: 2px solid var(--border-color);
      box-shadow: var(--shadow-sm);
    }

    .case-media {
      aspect-ratio: 16 / 9;
      background: #F1F5F9;
      overflow: hidden;
    }

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

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

    .case-card:hover .case-media img {
      transform: scale(1.04);
    }

    .case-body {
      padding: 20px;
    }

    .case-tag {
      font-size: 0.75rem;
      font-weight: 700;
      color: var(--primary);
      text-transform: uppercase;
      margin-bottom: 6px;
      display: block;
    }

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

    .step-item {
      background: var(--bg-white);
      border: 2px solid var(--border-color);
      border-radius: var(--radius);
      padding: 24px;
      position: relative;
    }

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

    /* 对比评测表格 */
    .eval-box {
      background: var(--bg-white);
      border: 2px solid var(--dark-text);
      border-radius: var(--radius);
      box-shadow: 8px 8px 0px var(--dark-text);
      overflow: hidden;
    }

    .eval-header {
      background: #FFF8F5;
      padding: 24px;
      border-bottom: 2px solid var(--dark-text);
      display: flex;
      justify-content: space-between;
      align-items: center;
      flex-wrap: wrap;
      gap: 16px;
    }

    .eval-score {
      display: flex;
      align-items: baseline;
      gap: 10px;
    }

    .score-stars {
      color: #FFB800;
      font-size: 1.2rem;
    }

    .score-val {
      font-size: 2.2rem;
      font-weight: 900;
      color: var(--primary);
    }

    .score-total {
      font-size: 1rem;
      color: var(--muted-text);
      font-weight: 600;
    }

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

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

    .eval-table th {
      background: #F8FAFC;
      color: var(--dark-text);
      font-weight: 800;
    }

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

    /* FAQ 折叠面板 */
    .faq-list {
      max-width: 860px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      gap: 14px;
    }

    .faq-item {
      background: var(--bg-white);
      border: 2px solid var(--border-color);
      border-radius: var(--radius);
      overflow: hidden;
      transition: border-color 0.2s;
    }

    .faq-item.active {
      border-color: var(--dark-text);
    }

    .faq-question {
      padding: 18px 24px;
      font-weight: 700;
      color: var(--dark-text);
      display: flex;
      justify-content: space-between;
      align-items: center;
      cursor: pointer;
      user-select: none;
    }

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

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

    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s ease, padding 0.3s ease;
      background: #F8FAFC;
      color: var(--muted-text);
      font-size: 0.95rem;
      line-height: 1.7;
    }

    .faq-item.active .faq-answer {
      max-height: 200px;
      padding: 16px 24px 20px;
      border-top: 1px solid var(--border-color);
    }

    /* 用户评论 */
    .review-card {
      background: var(--bg-white);
      border: 2px solid var(--border-color);
      border-radius: var(--radius);
      padding: 24px;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

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

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

    .reviewer-avatar {
      width: 42px;
      height: 42px;
      border-radius: 50%;
      background: #E2E8F0;
      color: var(--dark-text);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 800;
      font-size: 0.9rem;
    }

    .reviewer-name {
      font-weight: 700;
      font-size: 0.95rem;
      color: var(--dark-text);
    }

    .reviewer-role {
      font-size: 0.8rem;
      color: var(--muted-text);
    }

    /* 表单与需求匹配 */
    .form-wrapper {
      background: var(--bg-white);
      border: 2px solid var(--dark-text);
      border-radius: var(--radius);
      padding: 40px;
      box-shadow: 8px 8px 0px var(--dark-text);
      max-width: 800px;
      margin: 0 auto;
    }

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

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

    .form-label {
      display: block;
      font-weight: 700;
      font-size: 0.9rem;
      color: var(--dark-text);
      margin-bottom: 8px;
    }

    .form-control {
      width: 100%;
      padding: 12px 16px;
      border: 2px solid var(--border-color);
      border-radius: 8px;
      font-size: 0.95rem;
      color: var(--dark-text);
      background: #F8FAFC;
      transition: all 0.2s;
    }

    .form-control:focus {
      outline: none;
      border-color: var(--primary);
      background: #FFFFFF;
    }

    /* 行业资讯 / 文章列表 */
    .article-list {
      display: flex;
      flex-direction: column;
      gap: 12px;
    }

    .article-item {
      background: var(--bg-white);
      border: 1px solid var(--border-color);
      padding: 16px 20px;
      border-radius: 8px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      text-decoration: none;
      color: var(--dark-text);
      font-weight: 600;
      transition: all 0.2s ease;
    }

    .article-item:hover {
      border-color: var(--primary);
      color: var(--primary);
      transform: translateX(4px);
    }

    /* 底部通用 Footer */
    footer.site-footer {
      background: #0F172A;
      color: #94A3B8;
      padding: 60px 0 30px;
      border-top: 4px solid var(--primary);
    }

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

    .footer-col h4 {
      color: #FFFFFF;
      font-size: 1.1rem;
      font-weight: 700;
      margin-bottom: 18px;
    }

    .footer-col p {
      font-size: 0.9rem;
      line-height: 1.6;
      margin-bottom: 12px;
    }

    .footer-links {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 8px;
    }

    .footer-links a {
      color: #94A3B8;
      text-decoration: none;
      font-size: 0.9rem;
      transition: color 0.2s;
    }

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

    .qr-box {
      background: #FFFFFF;
      padding: 8px;
      border-radius: 8px;
      display: inline-block;
      max-width: 130px;
      margin-top: 8px;
    }

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

    .friend-links {
      border-top: 1px solid #1E293B;
      padding-top: 24px;
      margin-bottom: 24px;
      font-size: 0.85rem;
    }

    .friend-links span {
      color: #FFFFFF;
      font-weight: 700;
      margin-right: 12px;
    }

    .friend-links a {
      color: #64748B;
      text-decoration: none;
      margin-right: 16px;
      display: inline-block;
      transition: color 0.2s;
    }

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

    .footer-bottom {
      border-top: 1px solid #1E293B;
      padding-top: 20px;
      text-align: center;
      font-size: 0.85rem;
    }

    /* 浮动入口 */
    .float-panel {
      position: fixed;
      right: 20px;
      bottom: 30px;
      display: flex;
      flex-direction: column;
      gap: 10px;
      z-index: 999;
    }

    .float-btn {
      width: 50px;
      height: 50px;
      background: var(--dark-text);
      color: #FFFFFF;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.2rem;
      cursor: pointer;
      text-decoration: none;
      box-shadow: var(--shadow-lg);
      border: 2px solid #FFFFFF;
      transition: transform 0.2s;
    }

    .float-btn:hover {
      transform: scale(1.1);
      background: var(--primary);
    }

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

    @media (max-width: 768px) {
      .nav-links {
        display: none;
      }
      .mobile-menu-btn {
        display: block;
      }
      .hero-title {
        font-size: 2rem;
      }
      .grid-3, .grid-4, .grid-2 {
        grid-template-columns: 1fr;
      }
      .workflow-steps {
        grid-template-columns: 1fr;
      }
      .form-grid {
        grid-template-columns: 1fr;
      }
      .form-group.full-width {
        grid-column: span 1;
      }
      .footer-grid {
        grid-template-columns: 1fr;
      }
      .eval-table {
        display: block;
        overflow-x: auto;
      }
    }