.header {
    height: 40px;
    background: #333;
    line-height: 40px;
}
.header .left li,
.header .right li {
    display: inline-block;
}
.header .left li a,
.right li:nth-child(-n+3) a {
    position: relative;
    margin-right: 10px;
}
.header .left li a::after,
.right li:nth-child(-n+3) a::after {
    content: "";
    width: 1.6px;
    height: 16px;
    background: #424242;
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    margin: 0 7px;
}
.header .left li:last-child a::after,
.right li:nth-child(3) a::after {
    content: " ";
    position: static;
}
.right li:last-child {
    width: 120px;
    height: 40px;
    margin-left: 15px;
    color: #b0b0b0;
    background: #424242;
    text-align: center;
    position: relative;
}
.right li:last-child .dorp {
    width: 316px;
    height: 0;
    color: #424242;
    box-shadow: 0 2px 10px rgb(0 0 0 / 15%);
    background: #fff;
    position: absolute;
    right: 0;
    line-height: 100px;
    font-size: 12px;
    transition: height .3s;
}
.right li:last-child span {
    display: none;
    transition: all 1s ease 3s;
}
.right li:last-child:hover span {
    display: block;
}
.right li:last-child:hover .dorp {
    height: 100px;
}

.right li:last-child i{
    margin-right: 4px;
    font-size: 20px;
    vertical-align: -2px;
}
.header a {
    color: #b0b0b0;
}
.search {
    margin-top: 25px;
    overflow: hidden;
}
.search .logo {
    width: 55px;
    height: 55px;
    background: #ff6700 url("../img/mi-logo.png");
    background-position: center;
}
.search ul {
    margin-left: 187px;
    height: 55px;
    line-height: 55px;
}
.search ul li {
    float: left;
    padding: 0 10px;
}
.search ul li a{
    color: #333;
}
.search .keyword {
    width: 296px;
    height: 50px;
    border: 1px solid #e0e0e0;
}
.search .keyword input{
    width: 245px;
    height: 48px;
    border: none;
    outline: none;
    padding-left: 10px;
    padding-right: 10px;
    box-sizing: border-box;
    border-right: 1px solid #e0e0e0;
}
.search .s_icon {
    width: 51px;
    height: 48px;
    text-align: center;
    line-height: 48px;
}
.search .s_icon:hover {
    background: #ff6700;
}
.search .s_icon:hover i {
    color: #fff;
}
.search .keyword i{}