* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

em,i {
    font-style: normal;
}

li {
    list-style: none;
}

img {
    border: 0;
    /* 取消图片底部的空白缝隙 */
    vertical-align: middle;
}

button {
    cursor: pointer;
}

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

a:hover {
    color: red;
}

button,input{
    font-family: Arial, sans-serif;
    border: 0;
    outline: none;

}

body {
    /* 抗锯齿 */
    -webkit-font-smoothing:antialiase;
    background-color:#f5f5f5 ;
    font:12px/1.5 Arial, sans-serif;
    color: #333;
}

.clearfix:after {
visibility: hidden;
clear:both;
display: block;
content: '.';
height: 0;
}

.clearfix { 
    *zoom: 1;
}