.header_layout {
    width: 100%;
    padding: 15px 0 0 0;
    height: 60px;
    display: table;
    table-layout: fixed;
    background-color: white;
    box-shadow: 3px 0 2px 2px #c3c7c7;
}


.menu {
    width: auto;
    padding: 0;
    margin: 0 30% 0 auto;
    display: table;
    list-style-type: none; /* 将默认的列表符号去掉 */
    float: right;
}

.menu li {
    list-style: none; /* 将默认的列表符号去掉 */
    padding: 0;
    margin: 0;
    float: left;
    text-align: center;
}

.menu li a {
    display: inline-block;
    color: #000;
    text-decoration: none;
    width: 90px;
}

.menu li a:hover {
    background: #146C9C;
    color: #fff;
}