/* start reset & function */
body {
    font-size: 13px;
    margin: 0;
    color: #000;
    overflow: hidden;
    font-family: Helvetica, 'Microsoft Yahei';
}

ul {
    padding: 0;
    margin: 0;
    list-style: none;
}

* {
    box-sizing: border-box;
}

input,
button {
    font-family: Helvetica, 'Microsoft Yahei';
}

.fn-left {
    float: left;
}

.fn-right {
    float: right;
}

.fn-clear:before,
.fn-clear:after {
    display: table;
    content: "";
}

.fn-clear:after {
    clear: both;
}

.fn-none {
    display: none;
}
/* end reset & function */