.top1 {
    height: 2px;
    background-color: #dc2021;
}

.nav .nav_left li {
    width: 134px;
    background-color: #dc2021;
    border-right: 1px solid #C91E1E;
}

.nav .nav_left li:first-of-type {
    width: 96px !important;
}


.nav .nav_left li>div>ul>li {
    background-color: #F7F5FB;
}


.nav-ul {
    position: absolute;
    background-color: #F7F5FB;
    z-index: 10;
}

div.list-down {
    width: 100%;
    position: absolute;
    z-index: 10;
    opacity: 0.97;
    overflow: hidden;
    background-color: #F7F5FB;
    display: none;
    border-left: 1px solid #E5E2E9;
    border-right: 1px solid #E5E2E9;
    border-bottom: 1px solid #E5E2E9;
}

div.list-down>div {
    width: 1170px;
    overflow: hidden;
    margin: 0 auto;
}

div.list-down>div>div {
    transition: 500ms all;
    width: 134px;
    float: left;
    padding: 14px 0 10px;
    border-right: 1px solid #EAE8EE;
}

div.list-down>div>div:first-of-type {
    margin-left: 96px;
    border-left: 1px solid #EAE8EE;
}

.nav-ul>li:hover {
    cursor: pointer;
    background-color: #B30909 !important;
}

.list-down li,
.list-down li a {
    line-height: 32px;
    height: 32px;
    font-size: 14px;
    display: block;
    color: #222 !important;
    text-align: center;
}

.list-down li a:hover {
    color: #F40303 !important;
}

.banner form {
    /* width: 416px; */
    width: 392px;
}

.banner form input[type=text] {
    width: 246px;
}

#op-select {
    width: 102px;
    /* width: 126px; */
    float: left;
    padding: 0 6px;
    border: 0;
    border-right: 1px solid #ccc;
    height: 33px;
    font-size: 13px;
    color: #333;

    appearance: none;
    -moz-appearance: none;
    -webkit-appearance: none;
    background-image: url("https://www.dowater.com/image/select-down.png");
    background-repeat: no-repeat;
    background-position: 82px center;
    background-size: 9px 5px;
}

select::-ms-expand {
    display: none;
}