input {-webkit-appearance:none; /*去除iPhone nput默认样式*/}
input::-webkit-inner-spin-button {-webkit-appearance: none;}
input[type="number"]{-moz-appearance: textfield;}
textarea {-webkit-appearance: none;} 
html,body{height:100%;font-family:arial;margin:0;padding:0;}
.body_a{width:100%;padding:10px;background:white;box-shadow:0 0 3px rgba(0,0,0,0.2);margin-bottom:0;}
.body_b{width:100%;background:white;box-shadow:0 0 3px rgba(0,0,0,0.2);padding-bottom:15px;margin-bottom:15px;}
#calmethod{height:40px;border-radius:5px;border:1px solid black;text-align:center;margin-bottom:10px;}
#formula{height:40px;border-radius:5px;border:1px solid black;text-align:center;margin-bottom:10px;}
#nfactor{display:none;width:15%;height:40px;border-radius:5px;text-align:center;margin-bottom:10px;}
#dens_input_value,#xyz_input_value{padding-top:15px;}
.dens_input,.lab_input{width:80px;height:40px;text-align:center;border-radius:5px;margin-bottom:10px;border:1px solid gray;}
#method_title{margin:10px;font-size:16px;}
.input_submit{width:100px;border-radius:5px;margin-bottom:10px;}
#hidelabel{margin:10px;color:#0085b2;font-size:14px;}
#hideinfo{display:none;margin:10px;}
.result{font-size:30px;margin:15px;width:220px;height:100px;border:2px dashed gray;line-height:100px;}
.button{width:60px;height:40px;border-radius:5px;font-size:14px;}