.layui-frame * {
    -webkit-box-sizing: content-box;
    -moz-box-sizing: content-box;
    box-sizing: content-box;
}

.layui-frame .layui-btn,
.layui-frame .layui-input,
.layui-frame .layui-select,
.layui-frame .layui-textarea,
.layui-frame .layui-upload-button,
.layui-frame .layui-border-box, .layui-border-box * {
    -webkit-box-sizing: border-box;
    -moz-box-sizing: border-box;
    box-sizing: border-box;
}

.layui-frame .layui-box, .layui-box * {
    -webkit-box-sizing: content-box;
    -moz-box-sizing: content-box;
    box-sizing: content-box;
}

.layui-frame .layui-form .required::before {
    content: '*';
    color: red;
    margin-right: 3px;
    vertical-align: middle;
}