*{
    margin: 0;
    padding: 0;
}
/*ios滑动卡顿*/
body,html{
    -webkit-overflow-scrolling:touch
}
li{
    list-style: none;
}
a{
    color: #333;
    display: inline-block;
    text-decoration: none;
    -webkit-tap-highlight-color:transparent;
}
img{
    vertical-align: middle;
}
body{
    width: 100%;
    color: #222;
    letter-spacing: 1px;
}
.page_container{
    width: 100%;
}

/*大写字母*/
.upper_case{
    text-transform: uppercase;
}

/*小写字母*/
.lower_case{
    text-transform: lowercase;
}

/*首字母大写*/
.capitalize{
    text-transform: capitalize;
}

/*网站置灰*/
.pm_gray {
    /*grayscale(val):val值越大灰度就越深*/
    -webkit-filter: grayscale(100%);
    -moz-filter: grayscale(100%);
    -o-filter: grayscale(100%);
    filter: grayscale(100%);
}

/*禁止用户选中元素*/
.pm_wrap {
    -webkit-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
    user-select: none;
}

/*form*/
input {
    border: none;
    outline: none;
}

/*placeholder*/
input::-webkit-input-placeholder {
    color:#999;
}
input::-ms-input-placeholder {
    color:#999;
}
input::-moz-placeholder {
    color:#999;
}

/*overflow*/
.pm_overflow_1{
    overflow: hidden;
    text-overflow:ellipsis;
    white-space: nowrap;
}
.pm_overflow_2{
    display: -webkit-box;
    -webkit-box-orient: vertical;
    -webkit-line-clamp: 2;
    overflow: hidden;
    text-overflow: ellipsis;
    word-break: break-all;
}
.pm_overflow_3{
    display: -webkit-box;
    -webkit-box-orient: vertical;
    -webkit-line-clamp: 3;
    overflow: hidden;
    text-overflow: ellipsis;
    word-break: break-all;
}

/*float*/
.pm_float_left{
    float: left;
}
.pm_float_right{
    float: left;
}

/*clear*/
.clearfix:after{
    content:".";
    display:block;
    height:0;
    visibility:hidden;
    clear:both;
}
.clearfix{
    zoom:1;
}