/* 全局样式 */
body {
    background-color: #f8f9fa;
}

/* 侧边栏样式 */
.sidebar {
    position: fixed;
    top: 0;
    bottom: 0;
    left: 0;
    z-index: 100;
    padding: 48px 0 0;
    box-shadow: inset -1px 0 0 rgba(0, 0, 0, .1);
}

@media (max-width: 767.98px) {
    .sidebar {
        position: static;
        height: auto;
        padding-top: 20px;
    }
}

.sidebar .position-sticky {
    position: relative;
    top: 0;
    height: calc(100vh - 48px);
    padding-top: 0.5rem;
    overflow-x: hidden;
    overflow-y: auto;
}

/* 头像样式 */
.avatar {
    width: 100px;
    height: 100px;
    object-fit: cover;
    border: 3px solid #fff;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
}

/* 主内容区样式 */
main {
    padding-top: 20px;
}

@media (min-width: 768px) {
    main {
        padding-left: 40px;
    }
}

/* 卡片样式 */
.card {
    border: none;
    box-shadow: 0 0.125rem 0.25rem rgba(0, 0, 0, 0.075);
    transition: transform 0.3s ease;
}

.card:hover {
    transform: translateY(-5px);
}

/* 标签和分类样式 */
.badge {
    margin-right: 5px;
}

/* 页脚样式 */
footer {
    margin-top: 50px;
    padding-top: 20px;
    color: #6c757d;
}

/* 移动端搜索样式 */
.search-toggle-btn {
    padding: 0.5rem;
    margin-right: -6.5rem;
    border: none;
    background: transparent;
    color: rgba(255, 255, 255, 0.55);
    font-size: 1.2rem;
    transition: color 0.15s ease-in-out;
}

.search-toggle-btn:hover {
    color: rgba(255, 255, 255, 0.75);
}

.search-toggle-btn:focus {
    color: rgba(255, 255, 255, 0.75);
    box-shadow: none;
}

.mobile-search-container {
    background-color: #343a40;
    border-top: 1px solid #495057;
    position: relative;
    z-index: 1020;
    width: 100%;
}

.mobile-search-container .input-group {
    width: 100%;
    margin: 0;
}

.mobile-search-container .form-control {
    font-size: 0.875rem;
    flex: 1;
    min-width: 0;
}

.mobile-search-container .btn {
    flex-shrink: 0;
}