body,dl,dd,ul,ol,h1,h2,h3,h4,h5,h6,pre,form,input,textarea,p,hr,thead,tbody,tfoot,th,td{margin:0;padding:0;}
*{box-sizing:border-box;}
ul,ol{list-style:none;}
a{text-decoration:none;color:#333;}
html{-ms-text-size-adjust:none;-webkit-text-size-adjust:none;text-size-adjust:none;}
body{line-height:1.5; font-size:14px;}
body,button,input,select,textarea{font-family:'helvetica neue',tahoma,'hiragino sans gb',stheiti,'wenquanyi micro hei',5FAE8F6F96C59ED1,5B8B4F53,sans-serif;}
b,strong{font-weight:bold;}
i,em{font-style:normal;}
table{border-collapse:collapse;border-spacing:0;}
table th,table td{border:1px solid #ddd;padding:5px;}
table th{font-weight:inherit;border-bottom-width:2px;border-bottom-color:#ccc;}
img{border:0 none;width:auto9;max-width:100%;vertical-align:middle; height:auto;}
button,input,textarea{font-family:inherit;font-size:100%;margin:0;vertical-align:baseline;}
button,html input[type="button"],input[type="reset"],input[type="submit"]{-webkit-appearance:button;cursor:pointer;}
button[disabled],input[disabled]{cursor:default;}
input[type="checkbox"],input[type="radio"]{box-sizing:border-box;padding:0;vertical-align: -1px;width:.55rem;height:.55rem;}
input[type="search"]{-webkit-appearance:textfield;-moz-box-sizing:content-box;-webkit-box-sizing:content-box;box-sizing:content-box;}
input[type="search"]::-webkit-search-decoration{-webkit-appearance:none;}
input:focus{outline:none;}
a:hover,a:focus{text-decoration:none;}
select[size],select[multiple],select[size][multiple]{border:1px solid #AAA;padding:0;}
article,aside,details,figcaption,figure,footer,header,hgroup,main,nav,section,summary{display:block;}
audio,canvas,video,progress{display:inline-block;}
body{background:#fff;}

.header-btn ul li{position: relative;}
.header-btn ul li:before,.header-btn ul li:after{content:"";display:block;width: 0;height:0;border:1px solid transparent;box-sizing: border-box;position: absolute;}
.header-btn ul li:before{top:0;left:0;transition: border-color 0s ease-in 0.8s,width 0.2s ease-in 0.6s,height 0.2s ease-in 0.4s;}
.header-btn ul li:after{right:0;bottom:0;transition: border-color 0s ease-in 0.4s,width 0.2s ease-in 0.2s,height 0.2s ease-in ;}
 
.header-btn ul li:hover:before{width:100%;height:100%;transition:width 0.2s ease-in ,height 0.2s ease-in 0.2s;border-top-color:#02edf4;border-right-color:#02edf4;}
.header-btn ul li:hover:after{width:100%;height:100%;transition: border-color 0s ease-in 0.4s,width 0.2s ease-in 0.4s,height 0.3s ease-in 0.6s;border-bottom-color:#02edf4;border-left-color:#02edf4;}