.head {
    width: 100%;
    height: 270px;
}
.head_content{
    width: 1200px;
    margin: auto;
}
.head-top {
    width: 100%;
    height: 50px;
    /* padding: 0 350px; */
    line-height: 50px;
}

.head-top-left {
    width: 50%;
    float: left;
}

.head-top-right {
    display: flex;
    align-items: center;
    justify-content: space-between;
    float: right;
}

.head-top-right li {
    float: left;
}

.head-top a,
.head-top span {
    display: inline-block;
    margin-left: 10px;
    color: #0F7BD2;
    font-size: 14px;
}

.head-cen {
    width: 100%;
    height: 220px;
    padding: 71px 350px;
    background: url(head_bg.png);
    background-size: 100% 100%;
}

.head-logo {
    width: 460px;
    height: 133px;
    float: left;
}

.head-logo img {
    width: 100%;
}

.head-ser {
    width: 300px;
    height: 40px;
    margin-top: 10px;
    float: right;
}

.head-ser input {
    width: 240px;
    height: 40px;
    text-indent: 2em;
    outline: none;
    border: 1px solid #076fbe;
    border-top-left-radius: 10px;
    border-bottom-left-radius: 10px;
    float: left;
    font-size: 16px;
}

.head-ser button {
    width: 46px;
    height: 40px;
    border: none;
    outline: none;
    background: url(icon_search.png) center center no-repeat #076fbe;
    border-top-right-radius: 10px;
    border-bottom-right-radius: 10px;
    float: left;
    cursor: pointer;
}

/* 移动端 */
@media screen and (max-width:1200px) {
    body,
    .head,
    .head-top,
    .head_cen{
        width: 1200px;
    }
    .head-top{
        padding: 0;
    }
    .head-cen{
        padding: 71px 0;;
    }

}