.w_min_box {
    min-width: 1200px;
}

.w_clear:after {
    content: '';
    clear: both;
    display: block
}

.w_relative {
    position: relative;
}

.w_display {
    display: block
}

.w_top_nav {
    height: 54px;
    padding: 13px 0;
}

.w_top_nav_box {
    width: 1200px;
    margin: 0 auto
}

.logo {
    display: block;
    float: left;
    height:54px;
}
.logo img {
    height: 54px;
}
.w_left {
    float: left
}

.w_right {
    float: right
}

.w_top_nav_box ul {
    padding-left: 45px;
}
.w_top_nav {
    border-bottom: 1px solid #f4f4f4
}

.w_top_nav_li {
    display: block;
    padding: 0 18px;
    text-align: center;
    line-height: 54px;
    font-size: 16px;
}
    .w_top_nav_li.w_this {
        color: #F95E00
    }
    .w_top_nav_li.w_this::after {
        content: '';
        display: block;
        position: absolute;
        width: 70%;
        left: 15%;
        height: 2px;
        background: #F95E00;
    }
    .w_top_nav_li:hover {
        color: #F95E00
    }
.w_search {
    padding: 9px 0 9px 0px;
}

.w_search_input {
    width: 290px;
    height: 34px;
    padding-left: 15px;
    line-height: 35px;
    color: #333;
    font-size: 14px;
    float: left;
    outline: none;
    border-radius: 4px 0 0 4px;
    border: 1px solid #CCCCCC;
    border-right: 0;
    background: none;
    float: left;
}

    .w_search_input::-webkit-input-placeholder {
        color: #999999;
    }

.w_search_btn {
    width: 66px;
    height: 36px;
    border-radius: 0px 4px 4px 0px;
    border: 0;
    outline: none;
    float: left;
    background: url('/zhan/img/system-serch.png') no-repeat center;
    background-color: #F95E00;
    cursor: pointer;
}