/* http://meyerweb.com/eric/tools/css/reset/ 
   v2.0 | 20110126
   License: none (public domain)
*/
html,
body,
div,
span,
applet,
object,
iframe,
h1,
h2,
h3,
h4,
h5,
h6,
p,
blockquote,
pre,
a,
abbr,
acronym,
address,
big,
cite,
code,
del,
dfn,
em,
img,
ins,
kbd,
q,
s,
samp,
small,
strike,
strong,
sub,
sup,
tt,
var,
b,
u,
i,
center,
dl,
dt,
dd,
ol,
ul,
li,
fieldset,
form,
label,
legend,
table,
caption,
tbody,
tfoot,
thead,
tr,
th,
td,
article,
aside,
canvas,
details,
embed,
figure,
figcaption,
footer,
header,
hgroup,
menu,
nav,
output,
ruby,
section,
summary,
time,
mark,
audio,
video {
  margin: 0;
  padding: 0;
  border: 0;
  font-size: 100%;
  font: inherit;
  vertical-align: baseline;
}
/* HTML5 display-role reset for older browsers */
article,
aside,
details,
figcaption,
figure,
footer,
header,
hgroup,
menu,
nav,
section {
  display: block;
}
body {
  line-height: 1;
}
ol,
ul {
  list-style: none;
}
blockquote,
q {
  quotes: none;
}
blockquote:before,
blockquote:after,
q:before,
q:after {
  content: '';
  content: none;
}
table {
  border-collapse: collapse;
  border-spacing: 0;
}
* {
  box-sizing: border-box;
  font-family: "微软雅黑";
}
/*--如果你的网站已经安装了reset.css请去掉上面的代码段--*/
.nav {
  background: #444;
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  -webkit-box-align: center;
  -ms-flex-align: center;
  align-items: center;
  -webkit-box-pack: center;
  -ms-flex-pack: center;
  justify-content: center;
}
.nav .mobNav {
  display: none;
}
.nav .dropdown {
  width: 1200px;
}
.nav .menu {
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  -webkit-box-pack: start;
  -ms-flex-pack: start;
  justify-content: flex-start;
}
.nav .menu li {
  -webkit-box-flex: 1;
  -ms-flex: 1;
  flex: 1;
}
.nav .menu li:last-child a {
  border-right: none;
}
.nav .menu a {
  color: #fff;
  border-right: 1px solid #000;
  height: 35px;
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  -webkit-box-align: center;
  -ms-flex-align: center;
  align-items: center;
  -webkit-box-pack: center;
  -ms-flex-pack: center;
  justify-content: center;
  font-size: 12px;
  text-decoration: none;
}
.nav .menu a:hover {
  background: red;
  -webkit-transition: all 300ms linear;
  transition: all 300ms linear;
}
@media screen and (max-width: 750px) {
  .nav {
    background: #f2f2f2;
    position: relative;
    padding: 2vw;
  }
  .nav .mobNav {
    display: block;
    -webkit-box-flex: 1;
    -ms-flex: 1;
    flex: 1;
  }
  .nav .mobNav .toolBar {
    display: -webkit-box;
    display: -ms-flexbox;
    display: flex;
    height: 8vw;
    overflow: hidden;
  }
  .nav .mobNav .menuBtn {
    padding: 0;
    margin: 0;
    height: 8vw;
    width: 8vw;
    background: orange url(../imgs/bar.png) center center no-repeat;
    background-size: 7vw 7vw;
    border: none;
    outline: none;
    border-radius: 1px;
  }
  .nav .mobNav .menuBtn:active {
    opacity: 0.8;
  }
  .nav .mobNav .menuBtn.close {
    background: orange url(../imgs/close.png) center center no-repeat;
    background-size: 5vw 5vw;
  }
  .nav .mobNav a {
    -webkit-box-flex: 1;
    -ms-flex: 1;
    flex: 1;
    display: -webkit-box;
    display: -ms-flexbox;
    display: flex;
    -webkit-box-align: center;
    -ms-flex-align: center;
    -webkit-box-pack: center;
    -ms-flex-pack: center;
    justify-content: center;
    align-items: center;
  }
  .nav .mobNav a img {
    height: 100%;
    width: auto;
  }
  .nav .mobNav span {
    width: 8vw;
    height: 8vw;
  }
  .nav .dropdown {
    position: absolute;
    left: 0;
    top: 12vw;
    width: 100vw;
    background: rgba(0, 0, 0, 0.3);
    z-index: 999;
    display: none;
  }
  .nav .dropdown .menu {
    display: -webkit-box;
    display: -ms-flexbox;
    display: flex;
    -ms-flex-wrap: wrap;
    flex-wrap: wrap;
    -webkit-box-orient: vertical;
    -webkit-box-direction: normal;
    -ms-flex-direction: column;
    flex-direction: column;
  }
  .nav .dropdown .menu li {
    width: 100vw;
  }
  .nav .dropdown .menu li:last-child a {
    border-bottom: 0;
  }
  .nav .dropdown .menu a {
    display: -webkit-box;
    display: -ms-flexbox;
    display: flex;
    -webkit-box-align: center;
    -ms-flex-align: center;
    align-items: center;
    border-right: none;
    text-indent: 2vw;
    border-bottom: 1px solid #ddd;
  }
  .nav .dropdown.show {
    display: block;
  }
}