body {
    font-family: 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', sans-serif;
    margin: 0;
    padding: 0;
    background-color: #f8f9fa;
    color: #333;
}

header {
    background: linear-gradient(135deg, #2563eb 0%, #1d4ed8 100%);
    color: white;
    padding: 1rem 0;
    text-align: center;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

.header-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

header h1 {
    margin: 0;
    font-size: 2.5rem;
    font-weight: 600;
    letter-spacing: 1px;
}

.subtitle {
    color: rgba(255, 255, 255, 0.9);
    font-size: 1.1rem;
    margin-top: 0.75rem;
    font-weight: 300;
}

.category {
    margin: 1rem auto;
    max-width: 1200px;
    padding: 0 1rem;
}

.category h2 {
    font-size: 1.5rem;
    color: #1e40af;
    border-bottom: 2px solid #e0e7ff;
    padding-bottom: 0.75rem;
    margin-bottom: 1.5rem;
    font-weight: 500;
}

.card-container {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 1.5rem;
}

.card {
    width: 180px;  /* 减小宽度 */
    height: 80px; /* 减小高度 */
    padding: 15px;
    margin: 8px;
    background: white;
    border-radius: 10px;
    box-shadow: 0 4px 8px rgba(0,0,0,0.1);
    display: flex;
    flex-direction: row;
    align-items: center;
    justify-content: center;
    text-align: center;
    transition: transform 0.3s, box-shadow 0.3s;
}

.card i {
    font-size: 1.8rem; /* 减小图标大小 */
    margin-bottom: 10px;
    color: #4a6bdf;
}

.card h3 {
    margin: 0 0 5px 0;
    font-size: 1rem; /* 减小标题字体大小 */
    color: #333;
}

.card p {
    margin: 0;
    font-size: 0.8rem; /* 减小描述字体大小 */
    color: #666;
    line-height: 1.3;
}

.card-container {
    display: flex;
    flex-wrap: wrap;
    justify-content: flex-start; /* 左对齐 */
    gap: 12px; /* 减小间距 */
}
   

.card:hover {
    transform: translateY(-4px);
    box-shadow: 0 10px 15px rgba(0, 0, 0, 0.1);
    border-color: #3b82f6;
}

.card i {
    font-size: 2.5rem;
    margin-bottom: 1rem;
    color: #3b82f6;
    background: #eff6ff;
    width: 60px;
    height: 60px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.card h3 {
    margin: 0 0 0.5rem 0;
    color: #1e40af;
    font-size: 1.25rem;
    font-weight: 500;
}

.card p {
    margin: 0;
    color: #64748b;
    font-size: 0.95rem;
    line-height: 1.5;
    text-align: left;  /* 确保左对齐 */
    width: 100%;  /* 确保宽度填满容器 */
}
.card-content {
    margin-left: 10px;
    display: flex;
    flex-direction: column;
    align-items: flex-start; /* 左对齐 */; 
}

.new-feature-button {
  background-color: #007BFF; /* 按钮背景颜色 */
  color: white; /* 按钮文字颜色 */
  border: none; /* 移除边框 */
  border-radius: 5px; /* 圆角 */
  padding: 10px 20px; /* 内边距 */
  font-size: 16px; /* 字体大小 */
  cursor: pointer; /* 鼠标悬停样式 */
  transition: background-color 0.3s ease; /* 背景颜色过渡动画 */
}

.new-feature-button:hover {
  background-color: #0056b3; /* 鼠标悬停时的背景颜色 */
  transform: translateY(-2px); /* 鼠标悬停时向上移动2px */
  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1); /* 添加阴影 */
}