* {
    margin: 0;
    padding: 0;
    list-style: none;
    text-decoration: none;
    box-sizing: border-box;
}

/* 页眉 */
#header {
    width: 100%;
    height: 75px;
}
#header .nav {
    width: 1250px;
    height: 100%;
    margin: 0 auto;
    overflow: hidden;
}
#header .nav .partOne {
    width: 151px;
    height: 50px;
    float: left;
    padding-top: 10px;
}
#header .nav .logo {
    width: 151px;
    height: 50px;
    background: url("./images/soso.png");
    background-position-x: -206px;
    background-position-y: 3px;
}
#header .nav .partTwo {
    float: left;
    height: 100%;
    line-height: 75px;
    margin-left: 65px;
    position: relative;
}
#header .nav .partTwo ul {
    overflow: hidden;
}
#header .nav .partTwo ul li {
    float: left;
    margin-left: 35px;
}
#header .nav .partTwo ul li:first-child a {
    color: #31CCFF;
}
#header .nav .partTwo ul li:first-child {
    margin-left: 0;
}
#header .nav .partTwo ul li a:hover {
    color: #31CCFF;
} 
#header .nav .partTwo .beta {
    width: 39px;
    height: 16px;
    background: #F5F7F9;
    position: absolute;
    left: 384px;
    top: 10px;
    font-size: 14px;
    line-height: 16px;
    color: #999999;
    text-align: center;
    border-radius: 30px;
    border:1px solid #dddddd;
}
#header .nav .partThree {
    width: 102px;
    height: 38px;
    float: right;
    margin-top: 18px;
}
#header .nav .partThree .btn {
    width: 100%;
    height: 100%;
    background: #1ebcf0;
    color: #fff;
    font-size: 16px;
    text-align: center;
    line-height: 38px;
    border-radius: 4px;
}
#header .nav .partThree .btn:hover {
    background: #31ccff;
}
/* 主体 */
#main .banner {
    width: 100%;
    height: 480px;
    position: relative;
}
#main .banner img {
    width: 100%;
    height: 100%;
}
#main .banner .search {
    width: 692px;
    height: 58px;
    background: rgba(0,0,0,.15);
    overflow: hidden;
    position: absolute;
    top: 214px;
    left: 606px;

}
#main .banner .search input {
    width: 588px;
    height: 50px;
    float: left;
    padding: 15px;
    color: #999999;
    outline: none;
    margin-top: 4px;
    margin-left: 3px;
    border: 1px solid #adadad;
    border-top-left-radius: 4px;
    border-bottom-left-radius: 4px;
    background: rgba(255,255,255,.88);;
}
#main .banner .search img {
    width: 97px;
    height: 50px;
    float: left;
    margin-top: 4px;
}