.jisuan_z1{width: 100%; display: grid;  align-content: center; overflow: hidden;}
.jisuan_z2{height: auto;width: 90%; max-width: 960px; margin: auto; text-align: center;padding-bottom: 20px; }
.jisuan_z2 h2{font-size: 30px;color: #666;}
.jisuan_z3{width: 90%; max-width: 960px; height: auto; margin: auto;padding-bottom: 20px;}
.jisuan_z3 p{font-size:18px;}
.jisuan_z4{width: 150px; height: 60px;float: left; display: block; text-align: center;}
.jisuan_z4 samp{width: 150px; height: 29px; color: #000;font-size:18px;} 
.jisuan_z4_b{background: #e9e9e9; width: 140px; height: 25px;text-align: center; border: 2px solid #000; border-radius: 5px;}
.jisuan_z4_h{background: #e9e9e9; width: 140px; height: 25px;text-align: center; border: 2px solid #f00; border-radius: 5px;}
.jisuan_z4_x{background: #e9e9e9; width: 140px; height: 25px;text-align: center; border: 1px solid #333; border-radius: 5px;}