iframe{border:none}.iframe_PC{width:calc(100% - 4px);height:100%}.iframe_Phone{width:400px;height:calc(100% - 40px);margin:20px 0}.preview_cot{width:100%;height:calc(100vh - 40px);display:-webkit-box;display:-ms-flexbox;display:flex;-webkit-box-pack:center;-ms-flex-pack:center;justify-content:center}#wordDoanload{width:0;height:0;overflow:hidden}