.dropdown-item{
    display: block;
}
.dropdown-btn{
    color: #FFFFFF;
    background-color: #D0191E;
    width: 92px;
    font-size: 16px;
}
.dropdown-btn:hover{
    color: #FFFFFF;
}
.dropdown-menu li a{
    font-size: 16px;
}

.article-item-img{
    height: 272px;
}
.article-item-img img{
    width: 100%;
    height: 100%;
    object-fit: cover;  /* 关键属性：裁剪填充，保持比例 */
    object-position: center; /* 裁剪时居中显示 */
}
.icon-liulan{
    width: 16px;
    height: 16px;
    margin-right: 4px;
}