.learning-proof .course-intro{width:100%;max-width:880px;margin:0 auto;text-align:center;box-sizing:border-box}
.learning-proof .course-intro .course-intro-catch,.learning-proof .course-intro .course-intro-name,.learning-proof .course-intro .course-intro-time{width:100%;max-width:100%;margin-left:auto;margin-right:auto;text-align:center}
.learning-proof .course-intro .lead{width:100%;max-width:700px;margin:0 auto 12px!important;text-align:center;font-size:17px;line-height:1.8;box-sizing:border-box}
@media(max-width:767px){.learning-proof .course-intro .lead{max-width:32em;font-size:16px}.learning-proof .course-intro .intro-pc-break{display:none}}