.learning{display:flex;flex-direction:column;max-width:500px;margin:0 auto}.learning .step .content{background-color:#f6f6f6;margin-bottom:15px;padding:5px 15px;border-radius:15px}.learning .step .content .result{position:relative;margin:15px 0;min-height:18px}.learning .step .content .result:before{content:"";position:absolute;background-color:#bdbdbd;width:100%;height:1px;bottom:0}.learning .step .source_word{font-size:20px;color:#4b4b4b;margin:30px 0;text-align:center}.btn_next{font-size:16px;border-radius:15px;background-color:#f9ad2b;border:1px solid #F9AD2B;color:#4b4b4b;padding:20px 30px;margin-bottom:15px;min-width:300px}.btn_next:disabled{opacity:.5}