.nav_title{display:flex; width:100%;}
.nav_title a{
    color:#333;
    text-decoration: none;
    font-size:0.8rem;
    font-weight: 500;
}
.nav_title svg{
    width:15px;
}

.article_banner{
    display: flex;
    justify-content: center;
    align-items: center;
    color:#fff;
    font-size:2.5rem;
    padding: 4rem;
    background-size: cover;
}
.article_banner img{
    width:100%;
    object-fit: cover;
}
.article_nav{
    width:100%;
    height:3rem;
    border-bottom:1px solid #ccc;
    box-shadow: 0 2px 7px #1a242f17;
}
.article_nav ul{
    width:100%;
    display: flex;
    justify-content: center;
    gap:100px;
}
.article_nav ul li{
    height:3rem;
    line-height: 3rem;
    cursor: pointer;
    
    font-size:0.9rem;
}
.article_nav ul li:hover{
    color:red;
}
.article_nav ul .act{
    color:red;
    font-weight: bold;
    font-size:0.9rem;
    border-bottom:3px solid red;
}
.content{
    width:100%;
    display: flex;
    justify-content: center;
    margin-top:40px;
    margin-bottom:40px;
}
.content_des{
    width:60%;
}