@charset "UTF-8";
.send-sms:before { display:none; }
.send-sms[data-after]:after { content: '剩餘 ' attr(data-after) ' 秒' }
.send-sms[data-after=""]:before, 
.send-sms[data-after="0"]:before { display:inherit; }
.send-sms[data-after=""]:after, 
.send-sms[data-after="0"]:after { display:none; }