:root {
    --primary-color: #3a86ff;
    --primary-dark: #2667cc;
    --primary-light: #5e9eff;
    --secondary-color: #ff006e;
    --text-color: #2b2d42;
    --text-light: #8d99ae;
    --background-light: #f8f9fa;
    --background-dark: #212529;
    --white: #ffffff;
    --border-color: #e9ecef;
    --card-shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
    --transition: all 0.3s ease;
  }
  
  /* 首页内容样式 - 不再使用全局body样式 */
  .home-content {
    color: var(--text-color);
    line-height: 1.6;
  }
  
  .section-header {
    text-align: center;
    margin-bottom: 3rem;
  }
  
  .section-title {
    font-weight: 700;
    font-size: 2.5rem;
    margin-bottom: 1rem;
    color: var(--text-color);
  }
  
  .section-subtitle {
    color: var(--text-light);
    font-size: 1.1rem;
    max-width: 700px;
    margin: 0 auto;
  }
  
  section {
    padding: 5rem 0;
  }
  
  .btn {
    border-radius: 30px;
    padding: 0.8rem 2rem;
    font-weight: 500;
    transition: var(--transition);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    font-size: 0.9rem;
  }
  
  .btn-primary {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
    color: var(--white);
  }
  
  .btn-primary:hover {
    background-color: var(--primary-dark);
    border-color: var(--primary-dark);
    transform: translateY(-3px);
    box-shadow: 0 10px 20px rgba(58, 134, 255, 0.2);
  }
  
  .btn-outline {
    color: var(--primary-color);
    border: 2px solid var(--primary-color);
    background-color: transparent;
  }
  
  .btn-outline:hover {
    background-color: var(--primary-color);
    color: var(--white);
    transform: translateY(-3px);
    box-shadow: 0 10px 20px rgba(58, 134, 255, 0.2);
  }
  
  /* 英雄区域 */
  .hero-section {
    position: relative;
    padding: 0;
    background-color: var(--background-light);
    overflow: hidden;
  }
  
  .hero-content {
    padding: 8rem 0;
    position: relative;
    z-index: 2;
    background: linear-gradient(90deg, rgba(255,255,255,0.9) 0%, rgba(255,255,255,0.8) 50%, rgba(255,255,255,0) 100%);
  }
  
  .hero-title {
    font-size: 3.5rem;
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: 1.5rem;
    color: var(--text-color);
  }
  
  .hero-title .highlight {
    position: relative;
    z-index: 1;
    color: var(--primary-color);
  }
  
  .hero-title .highlight::after {
    content: '';
    position: absolute;
    bottom: 5px;
    left: 0;
    width: 100%;
    height: 8px;
    background-color: rgba(58, 134, 255, 0.2);
    z-index: -1;
  }
  
  .hero-lead {
    font-size: 1.25rem;
    color: var(--text-color);
    margin-bottom: 2rem;
    max-width: 90%;
  }
  
  .hero-buttons {
    display: flex;
    gap: 1rem;
  }
  
  .hero-video {
    position: absolute;
    top: 0;
    right: 0;
    width: 60%;
    height: 100%;
    background-image: url('/static/images/digital-human-demo.jpg');
    background-size: cover;
    background-position: center;
    cursor: pointer;
  }
  
  .video-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.3);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
  }
  
  .video-overlay:hover {
    background: rgba(0, 0, 0, 0.5);
  }
  
  .play-button {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 180px;
    height: 60px;
    background-color: var(--primary-color);
    color: var(--white);
    border-radius: 30px;
    font-weight: 600;
    font-size: 1.1rem;
    transition: var(--transition);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
  }
  
  .play-button::before {
    content: '▶';
    margin-right: 10px;
    font-size: 1.2rem;
  }
  
  .play-button:hover {
    background-color: var(--primary-dark);
    transform: scale(1.05);
  }
  
  /* 服务卡片 */
  .services-section {
    background-color: var(--white);
  }
  
  .service-card {
    height: 100%;
    transition: var(--transition);
    border-radius: 10px;
    overflow: hidden;
    border: 1px solid var(--border-color);
  }
  
  .service-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--card-shadow);
    border-color: transparent;
  }
  
  .service-card-inner {
    padding: 2rem;
  }
  
  .service-title {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
    color: var(--primary-color);
  }
  
  .service-divider {
    width: 50px;
    height: 3px;
    background-color: var(--primary-color);
    margin-bottom: 1.5rem;
  }
  
  .service-description {
    color: var(--text-light);
    margin-bottom: 0;
  }
  
  /* 功能卡片 */
  .features-section {
    background-color: var(--background-light);
  }
  
  .features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 2rem;
  }
  
  .feature-card {
    background-color: var(--white);
    padding: 2rem;
    border-radius: 10px;
    box-shadow: var(--card-shadow);
    transition: var(--transition);
    border: 1px solid transparent;
  }
  
  .feature-card:hover {
    transform: translateY(-10px);
    border-color: var(--primary-color);
  }
  
  .feature-title {
    font-size: 1.3rem;
    font-weight: 700;
    margin-bottom: 1rem;
    color: var(--text-color);
    position: relative;
    padding-bottom: 0.5rem;
  }
  
  .feature-title::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 30px;
    height: 3px;
    background-color: var(--primary-color);
  }
  
  .feature-description {
    color: var(--text-light);
    margin-bottom: 0;
  }
  
  /* 应用场景 */
  .scenarios-section {
    background-color: var(--white);
  }
  
  .scenarios-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: 2rem;
  }
  
  .scenario-card {
    height: 200px;
    border-radius: 10px;
    overflow: hidden;
    position: relative;
    box-shadow: var(--card-shadow);
    transition: var(--transition);
    background-color: var(--primary-color);
  }
  
  .scenario-card:nth-child(2) {
    background-color: var(--secondary-color);
  }
  
  .scenario-card:nth-child(3) {
    background-color: #4cc9f0;
  }
  
  .scenario-card:nth-child(4) {
    background-color: #8338ec;
  }
  
  .scenario-card:hover {
    transform: translateY(-10px);
  }
  
  .scenario-content {
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    padding: 1.5rem;
    color: var(--white);
    background: linear-gradient(0deg, rgba(0,0,0,0.7) 0%, rgba(0,0,0,0) 100%);
  }
  
  .scenario-content h3 {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
  }
  
  .scenario-content p {
    margin-bottom: 0;
    opacity: 0.9;
  }
  
  /* 响应式调整 */
  @media (max-width: 991.98px) {
    .hero-content {
      padding: 5rem 0;
      background: rgba(255,255,255,0.9);
    }
    
    .hero-title {
      font-size: 2.5rem;
    }
    
    .hero-lead {
      font-size: 1.1rem;
    }
    
    .hero-video {
      position: relative;
      width: 100%;
      height: 400px;
      margin-top: -100px;
    }
    
    .section-title {
      font-size: 2rem;
    }
  }
  
  @media (max-width: 767.98px) {
    section {
      padding: 3rem 0;
    }
    
    .hero-content {
      padding: 4rem 0 2rem;
    }
    
    .hero-title {
      font-size: 2rem;
    }
    
    .hero-video {
      height: 300px;
      margin-top: 0;
    }
    
    .features-grid,
    .scenarios-grid {
      grid-template-columns: 1fr;
    }
    
    .service-card {
      margin-bottom: 1.5rem;
    }
  }