body {font-family: Verdana, Arial, SimHei;line-height: 1;min-width: 1000px;margin: 0;background: #ffffff;}.center {position: relative;width: 1000px;margin: 0 auto;}#main {overflow: hidden;}#main_img {display: block;margin-left: -460px;}#btn_1 {position: absolute; top: 0; left: 0; display: block; width: 260px; height: 110px; }#btn_2 {font-family: Verdana, Arial, SimHei, sans-serif; font-size: 40px; line-height: 70px; position: absolute; top: 228px; left: 733px; display: block; width: 260px; transition: all 0.2s ease 0s; text-align: center; text-decoration: none; color: rgb(255, 255, 255); border-radius: 5px; background-color: rgb(250, 69, 38);}#btn_3 {font-family: Verdana, Arial, SimHei, sans-serif; font-size: 50px; line-height: 100px; position: absolute; top: 4695px; left: 107px; display: block; width: 320px; transition: all 0.2s ease 0s; text-align: center; text-decoration: none; color: rgb(255, 255, 255); border-radius: 15px; background-color: rgb(250, 69, 38);}#btn_4 {font-family: Verdana, Arial, SimHei, sans-serif; font-size: 50px; line-height: 100px; position: absolute; top: 4695px; left: 569px; display: block; width: 320px; transition: all 0.2s ease 0s; text-align: center; text-decoration: none; color: rgb(255, 255, 255); border-radius: 15px; background-color: rgb(250, 69, 38);}