bootstrap重新设计checkbox样式

<div class="col-sm-8 ">
    <div class="checkbox-custom checkbox-default">
        <input type="checkbox" >
            <label for="RememberMe">Remember Me</label>
    </div>
</div>

.checkbox-custom {
    position: relative;
    padding: 0 15px 0 25px;
    margin-bottom: 7px;
    margin-top: 0;
    display: inline-block;
}
/*
将初始的checkbox的样式改变
*/
.checkbox-custom input[type="checkbox"] {
    opacity: 0;/*将初始的checkbox隐藏起来*/
    position: absolute;
    cursor: pointer;
    z-index: 2;
    margin: -6px 0 0 0;
    top: 50%;
    left: 3px;
}
/*
设计新的checkbox，位置
*/
.checkbox-custom label:before {
    content: '';
    position: absolute;
    top: 50%;
    left: 0;
    margin-top: -9px;
    width: 19px;
    height: 18px;
    display: inline-block;
    border-radius: 2px;
    border: 1px solid #bbb;
    background: #fff;
}
/*
点击初始的checkbox，将新的checkbox关联起来
*/
.checkbox-custom input[type="checkbox"]:checked +label:after {
    position: absolute;
    display: inline-block;
    font-family: 'Glyphicons Halflings';
    content: "\e013";
    top: 42%;
    left: 3px;
    margin-top: -5px;
    font-size: 11px;
    line-height: 1;
    width: 16px;
    height: 16px;
    color: #333;
}
.checkbox-custom label {
    cursor: pointer;
    line-height: 1.2;
    font-weight: normal;/*改变了rememberme的字体*/
    margin-bottom: 0;
    text-align: left;
}