a:link {
    color: #666;
    text-decoration: none;
}

a:visited {
    color: #666;
    text-decoration: none;
}

a:hover {
    color: #666; 
    text-decoration: none;
    border-bottom: 3px solid #666;
}

body,
select,
input,
button {
    font-family: "Microsoft YaHei";
}

input {
    width: 450px;
    height: 40px;
    font-size: 20px;
    border-left: 1px solid #0080FF;
    border-right: 1px solid #0080FF;
    border-top: 1px solid #0080FF;
    border-bottom: 1px solid #0080FF;
    outline: none;
    box-sizing: border-box;
}

button {
    height: 40px;
    font-size: 20px;
    color: #FFF;
    background: #0080FF;
    border: 1px solid #0080FF;
    cursor: pointer;
    vertical-align: top;
    outline: none;
}

select {
    width: 120px;
    height: 40px;
    font-size: 20px;
    background: #FFFFFF;
    border-left: 1px solid #0080FF;
    border-top: 1px solid #0080FF;
    border-bottom: 1px solid #0080FF;
    cursor: pointer;
    vertical-align: top;
    outline: none;
}

.nav{
    cursor:pointer;
}

.nav:hover{
    border-bottom: 3px solid #666;
}