*{
    margin: 0;
    padding: 0;
}
a{
    text-decoration: none;
}
li{
    list-style: none;
}

/* 头部 */
.header_top{
    width: 1200px;
    height: 180px;
    margin: 0 auto;
    position: relative;
}
.header_top img:first-child{
    position: absolute;
    top: 30px;
    left: 0;
}
.header_top img:nth-child(2){
    position: absolute;
    left: 0;
    top: 105px;
        height: 15%;
}
.header_top img:nth-child(3){
    position: absolute;
    right: 0;
   top: 50px;
    width: 58%;
}

nav{
    width: 100%;
    height: 56px;
    background-color: #d7002e;
    padding: 8px 0;
}
.nav{
    width: 1246px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    line-height: 56px;
    
}
nav .nav ul li{
    text-align: center;
    position:relative;
    z-index: 1;
    width: 208px;
    float: left;
    font-size: 20px;
    transition: all .5s;
    padding: 0 0px;
}




nav .nav ul  li:hover a.first-child {
 
    font-weight: bold;
    color: red;
    background-color: white;
}
.nav li dl{
    
    width: 208px;
    white-space: nowrap;
  
    text-align: center;
    background: red;
    display: none;

}

.nav li.on dl{
    position: relative;
  display: block;
}
.nav ul li dl a{
    position: absolute;
    left: 0px;
    width: 100%;
    height: 88px;
    
    font-size: 15px;
    margin-top: -4px;
    display: inline-block;
    width: 100%;
    height: 60px;
}
.color{
    background-color: white;
    color: red !important;
}
nav .nav ul li a{
    width: 100%;
    height: 58px;
    display: inline-block;
    color: #fff;
}
.nav_color{
    background-color: white;
    color: red !important;
}
.nav ul li dd{
  height: 50px !important;
}
.search{
    position: relative;
}
.search input{
    width: 200px;
    height: 30px;
    border-radius: 15px;
    outline: none;
    font-size: 14px;
    padding-left: 14px;
    padding-right: 40px;
    background-color: transparent;
    border: 1px solid #fff;
    color: #fff;
}
.search input::-webkit-input-placeholder{
    color: #fff;
}
.search a{
    position: absolute;
    top: 7px;
    right: -135px;
}