#intro{overflow: hidden; background: #FFF; position: relative; margin-top: 90px;} 
#intro>.t2{ }
#intro>.t2>small{}
#intro>.contents{padding:20px 50px;color: #666; text-align: center;font-size: 15px; line-height: 30px; letter-spacing: 1px;opacity: 0.8;width: 740px;
margin: 0 auto 0 auto;}
#tutor{margin-top: 50px;}
/*#tutor>ul>li{float: left;width: 264px;margin-right: 19px;}*/
#tutor>ul{width: 1000px;display: flex;justify-content: space-around;margin:0 auto;}
#tutor>ul>li{float: left;width: 225px;margin-right: 10px; overflow: hidden;}
#tutor>ul>li:nth-child(6){margin-right: 0;}
#tutor>ul>li>img{width:110%}
#photo{margin-top: 100px; margin-bottom: 80px;}