/* 轻微的YouTube风格优化 - 仅针对推荐区域 */
.side-right {
    max-width: 300px; /* 进一步限制最大宽度 */
    flex: 0 0 300px; /* 固定宽度，不参与弹性布局 */
}

.side-right .panel {
    border: none;
    box-shadow: 0 1px 3px rgba(0,0,0,0.1);
    border-radius: 8px;
}

.side-right .panel-heading {
    background: #f8f9fa;
    border-bottom: 1px solid #e9ecef;
    border-radius: 8px 8px 0 0;
    padding: 12px 15px;
}

.side-right .panel-heading h4 {
    margin: 0;
    font-size: 16px;
    font-weight: 600;
    color: #333;
}

.side-right .panel-body {
    padding: 15px 12px; /* 减小内边距 */
}

/* 推荐项样式优化 */
.recommendation-item {
    display: flex;
    margin-bottom: 12px !important;
    padding: 8px;
    border-radius: 6px;
    transition: background-color 0.2s ease;
}

.recommendation-item:hover {
    background: #f8f9fa;
}

.recommendation-item .media-left {
    flex-shrink: 0;
    margin-right: 12px;
}

/* 缩略图样式 */
.recommendation-thumb {
    width: 100px !important;  /* 放大缩略图 */
    height: 75px !important;  /* 调整高度保持比例 */
    object-fit: cover;
    border-radius: 6px;
    background: #f5f5f5;
    transition: transform 0.2s ease;
}

.recommendation-thumb:hover {
    transform: scale(1.02);
}

/* 占位图片样式 */
.recommendation-placeholder {
    background: #f0f2f5 !important;
    border: 1px solid #e4e6ea !important;
    display: flex !important;
    align-items: center !important;
    justify-content: center !important;
    color: #666 !important;
    font-size: 24px !important;
}

.placeholder-icon {
    font-size: 24px;
    color: #999;
}

/* 标题样式 */
.recommendation-title {
    margin: 0 0 6px 0;
    line-height: 1.3;
    font-size: 14px;
    font-weight: 500;
}

.recommendation-title a {
    color: #333 !important;
    text-decoration: none;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    text-overflow: ellipsis;
}

.recommendation-title a:hover {
    color: #065fd4 !important;
    text-decoration: none;
}

/* 元数据样式 */
.recommendation-meta {
    font-size: 12px;
    color: #666;
    display: flex;
    align-items: center;
    gap: 4px;
}

.recommendation-meta i {
    font-size: 11px;
    opacity: 0.8;
}

/* 响应式优化 */
@media (max-width: 1200px) {
    .side-right {
        max-width: 280px;
    }
    
    .recommendation-thumb {
        width: 85px !important;
        height: 64px !important;
    }
}

@media (max-width: 992px) {
    .side-right {
        margin-top: 20px;
        max-width: 100%;
    }
    
    .recommendation-thumb {
        width: 100px !important;
        height: 75px !important;
    }
    
    /* 移动端水平布局 */
    .side-right .panel-body {
        display: flex;
        overflow-x: auto;
        gap: 15px;
        padding: 15px;
    }
    
    .recommendation-item {
        flex-direction: column;
        min-width: 200px;
        margin-bottom: 0 !important;
        background: white;
        border: 1px solid #eee;
        box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    }
    
    .recommendation-item .media-left {
        margin-right: 0;
        margin-bottom: 8px;
    }
    
    .recommendation-thumb {
        width: 100% !important;
        height: 120px !important;
    }
}

@media (max-width: 768px) {
    .recommendation-item {
        min-width: 160px;
    }
    
    .recommendation-thumb {
        height: 100px !important;
    }
    
    .recommendation-title {
        font-size: 13px;
    }
}