*{
    margin: 0 auto ;
    padding: 0;}
/*去除下划线*/
a{
    text-decoration: none;}
ul{
    list-style: none;}
body{
    min-width: 1518px;}
.top{
    height: 105px;
    width: 1518px;
    background-image:
    background-repeat: no-repeat;
    background-position: center;}
.top_nav{
    background-color: #3285c4;
    overflow: hidden;
    width: 1535px;}
.nav{
    width: 1280px;
    font-size: 17px;
    height: 40px;
    float:left;
    margin-left:60px;
    /* background-color: chartreuse; */
    line-height: 40px;}
li{
    float: left;}
li a,.dropdth{
    display: inline-block;
    color:white;
    padding: 0px 30px;}
.dropdown{
    display: inline-block;
    position: relative;
    z-index: 10;}
.dropdown:hover{
    background-color: #f8f6f6;
    transition: all 0.1s linear ;
    opacity: 0.8;}
.dropdown:hover a{
    color: #000;}
.case_content{
    width: 128px;
    background-color: #f8f6f6;
    position: absolute;
    display: none;}
.case_content a{
    display: block;}
.case_content a:hover{
    background-color:#3285c4;
    color: white;}
.case_content1{
    width: 162px;
    background-color: #f8f6f6;
    position: absolute;
    display: none;}
.case_content1 a{
    display: block;
    text-align: center;}
.case_content1 a:hover{
    background-color: #3285c4;
    color: white;}
.case:hover .case_content1{
    display: block;}
.case:hover .case_content{
    display: block;}
/* 主体 */
.picture{
    width: 1535px;
    height: 172px;
    /* background-color: rosybrown; */
    background-image: url(timg.jpg);
    background-repeat: no-repeat;}
.main{
    width: 1280px;
    height: auto;
    min-height: 460px;
    /* background-color: rosybrown; */
    position: relative;
    }
/* 底部 */
.bottom{
    height: 160px;
    background-color: #333333;
    position: relative;}
.address{
    text-align: center;
    padding-top: 30px;
    color: #ababab;}
.copyright{
    text-align: center;
    padding-top:30px ;
    color: #ababab;}
.nav_left{
    width: 240px;
    float: left;
    margin-top: 50px;
    margin-left: 50px;
    }
.content{
    display: block;
    width: 940px;
    float: right;
    margin-top: 50px!important;
    position: static;
    }
.header{
    width: 240px;
    height: 60px;
    background-color:  #3285c4;
    line-height: 60px;
    text-align: center;
    font-size: 23px;
    color: white;}

.sidebar{
    width: 240px;
    height: 50px;
    background-color: #ededed;
    line-height: 50px;
    text-align: center;
    font-size: 20px;
    border-bottom: 1.5px #747272 solid;}
.sidebar a{
    color:#3285c4 ;
    display: block;}
.sidebar a:hover,.sidebar a.hover{
    background-color:#bdc3ca ;
    color: white;}
.title_case{
    width: 940px;
    height: 40px;
    /* background-color: aqua; */
    position: relative;}
.work{
    color: #333333;  
    font-size: 23px;
    line-height: 40px;
    font-weight:bold;  /*加粗*/
    float: left;
    margin-left: 10px;}
.more{
    float: right;
    font-size: 15px;
    margin-top: 16px;
    color: #868686;}
.more a{
    margin-top: 16px;
    color: #868686;}  
.line{
    width: 940px;
    height: 2px;
    background-color:#3285c4;
    position: absolute;
    top: 38px;}
.s_content{
    width: 940px;
    height: 45px;
    /* background-color: blueviolet; */
    position: relative;
    line-height: 45px;
    border-bottom: darkgray 1.5px solid;}
.cssul{
    width: 5px;
    height: 5px;
    background-color: #3285c4;
    border-radius: 80%;
    float: left;
    margin-top: 22px;
    margin-left: 20px;
    margin-right: 10px;}
.s_content a{
    color: #333333;
    display: block;}
.s_content a:hover{
    color: #3285c4;}
.s_content_time{
    color: #333333;
    position: absolute;
    top: 0px;
    right: 20px;}