/* main */
main {
    width: 1200px;
    height: auto;
    margin: 50px auto;
    border-radius: 10px;
    display: flex;
    justify-content: center;
}
.left{
    width: 20%;
    height: auto;
    background:linear-gradient(to bottom,#24A0F2, #1A72AD);
    border-radius: 6px;
    padding-bottom: 2%;
}
.left-title{
    width: 180px;
    height: 55px;
    margin: 30px auto;
    border-left: 3px solid #fff;
}
.title-crude{
    font-size: 24px;
    font-weight: 500;
    color: #fff;
    display: block;
    margin-left: 10px;
    line-height: 30px;
}
.title-english{
    font-size: 16px;
    display: block;
    margin-left: 12px;
    color: #fff;
    line-height: 30px;
}
.catalog{
    width: 200px;
    height: auto;
    margin: 0 auto;
}
.catalog>li{
    width: 100%;
    height: 55px;
    overflow: hidden;
    margin: 0 auto;
    color: #EFEFEF;
}
.catalog>li:hover{
    border: 1px solid #fff;
}
.catalog .catalog-active{
    border: 1px solid #fff;
}
.catalog-p{
    font-size: 16px;
    line-height: 55px;
    display: block;
    margin-left: 20px;
}

.duty {
    width: 70%;
    background: #fff;
    margin-left: 40px;
}

.list {
    width: 100%;
    height: 45px;
    background: #0F6BBF;
    font-size: 20px;
    line-height: 45px;
    text-align: center;
    color: #fff;
    border-radius: 10px 10px 0 0;
}

.duty-content{
    width: 90%;
    height: auto;
    margin: 30px auto;
    font-size: 16px;
    text-indent: 2em;
    line-height: 35px;
}

.duty-content>img{
    display: block;
    margin: 0 auto;
}
.duty-content table tr td{
    padding: 15px;
}