/* 卡片图标样式 */
.card-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 80px;
  height: 80px;
  margin: 0 auto 1rem;
  border-radius: 50%;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  color: white;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.card-icon svg {
  transition: transform 0.3s ease;
}

.feature-card:hover .card-icon {
  transform: translateY(-5px);
  box-shadow: 0 10px 25px rgba(102, 126, 234, 0.3);
}

.feature-card:hover .card-icon svg {
  transform: scale(1.1);
}

/* 卡片箭头样式 */
.card-arrow {
  margin-top: 1rem;
  opacity: 0;
  transform: translateX(-10px);
  transition: opacity 0.3s ease, transform 0.3s ease;
}

.feature-card:hover .card-arrow {
  opacity: 1;
  transform: translateX(0);
}

.card-arrow svg {
  color: #667eea;
  transition: transform 0.3s ease;
}

.feature-card:hover .card-arrow svg {
  transform: translateX(5px);
}

/* 深色模式适配 */
[data-theme="dark"] .card-icon {
  background: linear-gradient(135deg, #4a5568 0%, #2d3748 100%);
}

[data-theme="dark"] .feature-card:hover .card-icon {
  box-shadow: 0 10px 25px rgba(74, 85, 104, 0.5);
}

[data-theme="dark"] .card-arrow svg {
  color: #9f7aea;
}

/* 标题区域动画 */
.display-4 {
  animation: fadeInUp 0.8s ease-out;
}

.lead {
  animation: fadeInUp 0.8s ease-out 0.2s both;
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* 卡片悬停效果增强 */
.feature-card {
  transition: all 0.3s ease;
  border: 1px solid transparent;
}

.feature-card:hover {
  border-color: #667eea;
  box-shadow: 0 15px 35px rgba(102, 126, 234, 0.1);
}

[data-theme="dark"] .feature-card:hover {
  border-color: #9f7aea;
  box-shadow: 0 15px 35px rgba(159, 122, 234, 0.2);
}