li{
    list-style: none;
}
ul,p,h1,h2,h3,h4,ol{
    margin: 0;
    padding: 0;
}
html,a{
    color: #333;
}
a:hover{
    color: #333;
    text-decoration: underline;
}
.hr{
    height: 1px;
    background-image: linear-gradient(to right,red,rgb(0, 247, 255),blue,red,rgb(0, 247, 255),blue);

}
.title{
    /* line-height: 50px; */
    border-bottom: 1px solid #ccc;
}


.title a{
    display: inline-block;
    line-height: 50px;
    font-size: 20px;
    font-weight: 700;
    border-bottom: 2px solid #4e6ef2;
    padding: 5px 10px;
    color: #4e6ef2;
}
.title a:hover{
    text-decoration: none;
}

.ad{
    position: relative;
    margin: 10px 0;
}
.ad a{
    display: block;
}
.ad img{
    width: 100%;
}
.ad span{
    position: absolute;
    padding: 2px 4px;
    font-size: 12px;
    background-color: rgba(0, 0, 0, 0.541);
    color: #fefefe;
    top: 0;
    right: 0;
}

.ad p,.con2_se2 p,.as_list2 p{
    position: absolute;
    height: 30px;
    left: 0;
    bottom: 0;
    background-color:rgba(0, 0, 0, 0.5);
    width: 100%;
    margin: 0;
    color: #fff;
    padding-left: 10px;
    font-size: 14px;
    line-height: 30px;
}


.over{
    display: block;
    white-space:nowrap;
    overflow:hidden;
    text-overflow:ellipsis;
}
.style li{
    padding-left: 15px;
    position: relative;
    font-size: 14px;
    line-height: 25px;
}
.style li::before{
    content: "";
    position: absolute;
    background-color: #bbb;
    width: 6px;
    height: 6px;
    transform: rotate(45deg);
    left: 0px;
    top: 10px;
}
.style li:nth-child(1)::before{
    background-color: red;
}
.style li:nth-child(2)::before{
    background-color: orangered;
}
.style li:nth-child(3)::before{
    background-color: yellowgreen;
}
/* *************** */
nav > div{
    width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    height: 80px;
    align-items: center;
}
nav > div > a{
    display: block;
    font-size: 40px;
    color: #4e6ef2;
    width:200px;
}
nav > div > a:hover{
    /* color: #fff; */
    text-decoration: none;
}
nav ul{
    display: flex;
    justify-content: space-between;
    margin: 0 20px;
    flex-grow: 1;
    padding: 0;
}
nav input{
    outline: none;
    border: 1px solid #ccc;
    border-radius: 4px;
    padding: 5px 10px;
    font-size: 12px;
}


/* *************** */
footer{
    border-top: 1px solid #ccc;
    text-align: center;
    font-size: 14px;
    line-height: 30px;
    padding: 50px 0;
    margin-top: 20px;
}
footer a{
    margin: 0 10px;
}
/* ******************* */

main{
    width: 1200px;
    margin: 20px auto 0;
    display: flex;
    justify-content: space-between;
}
.aside{
    width: 300px;
}
.list{
    width: 880px;
}
.list > .breadcrumb{
    background-color: #fff;
    border-bottom: 1px solid #ccc;
}
.as_list{
    padding: 10px 0;
    border-bottom: 1px solid #ccc;
}
.as_list li:nth-child(1){
    color: #000;
    font-weight: 700;
}
.list .con3_list{
    margin-top: 10px;
}
.list .con3_list li{
    display: flex;
    justify-content: space-between;
    margin-top: 15px;
    height: 200px;
    border-bottom: 1px solid #ccc;
    align-items: center;
}
.list .con3_list img{
    width: 250px;
    height: 150px;
    display: block;
}
.list .con3_list div{
    height: 150px;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}
.list .con3_list a + div{
    width: calc(100% - 260px);
}
.list .con3_list h4{
    font-size: 18px;
    margin-bottom: 10px;
    font-weight: 700;
}
.list .con3_list p{
    font-size: 16px;
    color: #666;
    text-indent: 2em;
}
.list .con3_list section{
    display: flex;
    justify-content: space-between;
    font-size: 14px;
    color: #666;
}
.aside h4{
    font-size: 16px;
    font-weight: 700;
    margin: 10px 0;
}

.aside .con2_se2{
    display: flex;
    justify-content: space-between;
}
.aside .con2_se2 a{
    position: relative;
    width: 48%;
}
.aside .con2_se2 a img{
    display: block;
    width: 100%;
}
.as_list2 {
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
}
.as_list2 li{
    width: 32%;
    position: relative;
}
.as_list2 li  a{
    display: block;
}
.as_list2 li img{
    display: block;
    width: 100%;
}
.as_list2 li p{
    font-size: 12px;
    height: 25px;
    line-height: 25px;
}
.page{
    width: 1200px;
    margin: 20px auto;
    display: flex;
    justify-content: flex-end;
}

.return{
    position: fixed;
    bottom: 100px;
    right: 100px;
    background-color: #fff;
    display: none;
}