/* 全局样式 */
body {
    font-family: 'Noto Sans SC', sans-serif;
    color: #333333;
    background-color: #f5f7fa;
    line-height: 1.6;
}

/* 导航栏样式 */
.navbar {
    background-color: #3498db !important;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
}

/* 页脚样式 */
.footer {
    margin-top: 2rem;
    border-top: 1px solid #e9ecef;
}

/* 卡片样式 */
.card {
    transition: transform 0.3s, box-shadow 0.3s;
    border: none;
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
}

/* 分类卡片样式 */
.category-card {
    border-radius: 10px;
    overflow: hidden;
}

.category-icon {
    color: #3498db;
    margin-bottom: 1rem;
}

/* 子文件夹卡片样式 */
.subfolder-card {
    border-radius: 8px;
}

/* 按钮样式 */
.btn-primary {
    background-color: #3498db;
    border-color: #3498db;
}

.btn-primary:hover, .btn-primary:focus {
    background-color: #2980b9;
    border-color: #2980b9;
}

.btn-outline-primary {
    color: #3498db;
    border-color: #3498db;
}

.btn-outline-primary:hover, .btn-outline-primary:focus {
    background-color: #3498db;
    border-color: #3498db;
}

/* 辅助色按钮 */
.btn-secondary {
    background-color: #e67e22;
    border-color: #e67e22;
}

.btn-secondary:hover, .btn-secondary:focus {
    background-color: #d35400;
    border-color: #d35400;
}

/* 面包屑导航 */
.breadcrumb {
    background-color: transparent;
    padding: 0.5rem 0;
}

.breadcrumb-item a {
    color: #3498db;
    text-decoration: none;
}

.breadcrumb-item a:hover {
    text-decoration: underline;
}

/* 响应式调整 */
@media (max-width: 768px) {
    .card {
        margin-bottom: 1rem;
    }
}

/* 动画效果 */
.fade-in {
    animation: fadeIn 0.5s ease-in;
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

/* 主内容区样式 */
main.container {
    min-height: calc(100vh - 200px);
}