.search-box {
    position: fixed;
    width: 100%;
    height: 100%;
    display: none;
    left: 0;
    right: 0;
    top: 0px;
    background: rgba(0, 0, 0, 0.8);
    padding: 300px 0;
    z-index: 10000000;}
.search-close {
    display: block;
    position: absolute;
    top: 34px;
    right: 10%;
    width: 40px;
    height: 40px;
    background: url(images/close.png) center no-repeat;}

.search-width {
    max-width: 700px;
    margin: 0 auto;
    position: relative;
    padding-right: 100px;}

.search-width .form-control {
    border: solid 1px #999;
    color: #fff;
    font-size: 16px;
    border-radius: 0;
    background: none;
    box-shadow: none;
    height: 50px;
    display: block; 
    width: 100%;}

.btn-search, .btn-search:hover, .btn-search:focus {
    position: absolute;
    right: 0;
    top: 0;
    width: 100px;
    border-radius: 0;
    height: 50px;
    padding: 0;
    background: #fff;}

.btn-search{
    font-size: 18px;
    color: #555;
    padding-left: 35px;
    background:#fff url(images/ss.png) left 16px center no-repeat;
    line-height: 50px;
    display: inline-block;}
/**组件**/
.head .px1400{width:96%;    max-width: initial;}
.st ul{display:none !important;}

.search-a {
    float: right;
    margin-left: 30px;
    margin-top: 20px;}

@media screen and (max-width: 1700px){
.nav>ul>li{margin-left:15px;}
.nav>ul>li>a{font-size:16px;}
}

@media screen and (max-width: 1490px){
.head .px1400 {width: 96%;}
.logo {width:400px;margin-top: 10px;}
.logo img{width:100%;}
.head{padding-top: 12px;
    padding-bottom: 14px;}
}

@media screen and (max-width: 1400px){
.logo {width:320px;}
.nav>ul>li {margin-left: 10px;}
.head .px1400{width:100%;}
.search-a{    margin-left: 10px;}
}


@media screen and (max-width: 1250px){
.nav>ul>li>a {font-size: 15px;}
}


@media screen and (max-width: 1200px){
.nav>ul{width:calc(100% - 70px);}
.nav>ul>li{width:9.09%;}
.search-a {float: left;}
}