标准bootstrap3 form表单美化

        /*文本框美化*/
        .form-control[type='text'], .form-control[type='password'] {
            padding-left: 20px;
        }

        .form-group:last-child label:before {
            position: absolute;
            left: 20px;
            top: 36px;
            z-index: 9;
            width: 0;
            height: 0;
            display: block;
            border-left: 8px solid #337ab7;
            border-top: 6px solid transparent;
            border-bottom: 6px solid transparent;
            content: "";
        }