.clr {
    clear: both;
    height: 1px;
    margin: 0;
    padding: 0;

}

.center {
    width: 1180px;
    margin: 0 auto;
}

body {
    background: #fff;
    width: 100%;
    overflow-x: hidden;
}

header {
    width: 100%;
    background: rgba(160, 160, 160, 0.15);
    position: absolute;
    top: 0;
    left: 0;
    height: 90px;
    border-top: 4px solid #2d3546;
    border-bottom: 4px solid #2d3546;
    box-sizing: border-box;
    z-index: 10;
}

header img {
    display: inline-block;
    float: left;
    width: 114px;
    height: 51px;
    margin: 10px 0 0 0;
}

header .nav {
    float: right;
    width: 1000px;
    overflow: hidden;
}

header .nav a {
    /*width: 16.666%;*/
    padding: 0 50px;
    display: inline-block;
    float: left;
    color: #fff;
    line-height: 82px;
    height: 82px;
    text-align: center;
    position: relative;
    overflow: hidden;
}

header .nav a.on {
    color: #33cde5;
}
header .nav a.on:after{
    content: "";
    display: block;
    width: 50%;
    margin: 0 auto;
    background: #33cde5;
    height: 2px; position: absolute;
    left: 50%;
    -webkit-transform: translate(-50% ,0);
    transform: translate(-50% ,0);
    bottom: 0;
}
.nav a .bor {
    background: #33cde5;
    height: 2px;
    width: 0;
    position: absolute;
    left: 50%;
    -webkit-transform: translate(-50% ,0);
    transform: translate(-50% ,0);
    bottom: 0;
}

.nav a:hover {
    color: #33cde5;
}

.nav a:hover .bor {
    -webkit-transition: all 0.5s ease;
    transition: all 0.5s ease;
    width: 50%;
}
@-webkit-keyframes all {
    from { width: 0}
    to { width: 50% }
}
@keyframes all {
    from { width: 0}
    to { width: 50% }
}
div.main {
    width: 100%;
    height: auto;
}

div.main h2 {
    text-align: center;
    margin: 0;
    color: #333333;
    font-size: 24px;
    line-height: 38px;
    font-weight: 400;
}

div.main h3 {
    text-align: center;
    margin: 0;
    color: #999999;
    font-size: 14px;
    line-height: 22px;
    font-weight: 400;
    font-family: "微软雅黑", sans-serif, Arial;
    letter-spacing: 5px;
}

.about .main,.news .main,.product .main,.more .main{
    border-top:90px solid #373d41 ;
    padding: 5% 0;
    overflow: hidden;
}
.about h1,.news h1,.product h1{
    color: #333333;
    font-weight: 600;
    font-size: 42px;
    line-height: 48px;
    margin: 0 0 4%;
}
.about h1 b,.news h1 b,.product h1 b{
    color: #c1c1c1;
    font-size: 28px;
    font-weight: 400;
    letter-spacing: 8px;
}
.about em,.news em,.product em{
    font-style: normal;
    color: #c1c1c1;
    font-weight: 400;
    font-size: 28px;
    line-height: 48px;
}

footer {
    width: 100%;
    background: #373d41;

    padding: 1% 0;
}

footer img {
    display: block;
    margin: 0.5% auto;
    border: 10px rgba(255, 255, 255, 0.14) solid;
    width: 76px;
    height: 76px;

}

footer p {
    text-align: center;
    color: #cccaca;
    font-size: 14px;
    line-height: 22px;
    font-weight: 400;
}