.head{ //display: flex; border-bottom:2px solid #d4dde4; width: 100%; height: 68px; background-color:white ; } .chaxun{ margin-left: 20px; padding: 15px 32px; } .zhu{ padding-top: 200px; //padding: 100px 100px 100px 100px; text-align: center; height: 300px; width: 1700px; }