.header_top {
    height: 40px;
    line-height: 40px;
    font-size: 18px;
    font-weight: 400;
    background: #EBEBEB;
    margin: auto;
}

.header_top_item {
    width: 100%px;
    margin: 0 auto;
}

.header_top_item_left {
    width: 30%;
    float: left;
    display: flex;
    justify-content: flex-end;
}

.header_top_item_right {
    width: 40%;
    float: right;
    display: flex;
}

.header_top_item_right li {
    margin: 0 0 0 30px;
}

.header_center {
    height: 250px;
    background: url(header_bg.png);
    background-size: 100% 100%;
    background-repeat: no-repeat;
}

.header_content {
    width: 1200px;
    margin: auto;
    display: flex;
    justify-content: space-between;
    padding: 42px 4px 0;
}

.header_center_left img {
    display: inline-block;
    vertical-align: middle;
}

.header_center_right {
    width: 350px;
    height: 40px;
    margin-top: 42px;
}

.header_center_right input:nth-child(1) {
    width: 225px;
    height: 40px;
    border: 1px solid #235DDB;
    text-indent: 20px;
    border-top-left-radius: 10px;
    border-bottom-left-radius: 10px;
    outline: none;
}

.header_center_right button {
    position: absolute;
    left: auto;
    width: 75px;
    height: 40px;
    border-top-right-radius: 10px;
    border-bottom-right-radius: 10px;
    border: 1px solid #235DDB;
    background-color: #235DDB;
}