*{ margin: 0; padding: 0; -webkit-tap-highlight-color:rgba(0,0,0,0); -webkit-tap-highlight-color:transparent; font-family: "微软雅黑"; box-sizing:border-box;-webkit-box-sizing: border-box;-moz-box-sizing: border-box; }
a{ cursor:pointer; }
html,body{ min-height: 100%;  }
body{ -webkit-touch-callout:none; -webkit-text-size-adjust:none;
    /*-webkit-user-select:none; */
    -webkit-font-smoothing:antialiased;}
ol,ul,dl,dt,li{ list-style: none;}
img{ border:none;}
input{ outline: none;}
input:focus,textarea:focus{ background-color: none; outline: none !important;}
@media all and(max-height:360px){
    body,html{
        font-size:12px;
    }
}
@media all and(max-height:414px){
    body,html{
        font-size:14px;
    }
}
@media all and(max-height:767px){
    body,html{
        font-size:16px;
    }
}

.w2{
    letter-spacing:2em; /*如果需要y个字两端对齐，则为(x-y)/(y-1),这里是（4-2）/(2-1)=2em */
    margin-right:-2em; /*同上*/
}
.w3{
    letter-spacing:0.5em; /*如果需要y个字两端对齐，则为(x-y)/(y-1),这里是（4-3）/(3-1)=0.5em */
    margin-right:-0.5em; /*同上*/
}