* {
  margin: 0;
  padding: 0;
  font-family: "Microsoft YaHei";
  font-size: 16px;
}

li {
  list-style: none;
}

a {
  text-decoration: none;
  outline: none;
  -moz-outline-style: none;
  -webkit-tap-highlight-color: transparent;
  -webkit-touch-callout: none;
  -webkit-user-select: none;
}

i {
  font-style: normal;
}

body {
  background-color: #ffffff;
  width: 100%;
  overflow-x: hidden;
}

.content-auto {
  width: 1200px;
  margin: 0 auto;
}

.head-top {
  min-width: 1200px;
}

.nav-all {
  /*background: rgba(0, 0, 0, 0.5);*/
  padding: 15px 0;
  position: absolute;
  left: 0;
  top: 0;
  width: 100%;
}

.nav-all .nav {
  display: -webkit-box;
  display: -webkit-flex;
  display: -ms-flexbox;
  display: flex;
  -webkit-box-pack: justify;
  -webkit-justify-content: space-between;
  -ms-flex-pack: justify;
  justify-content: space-between;
  -webkit-box-align: center;
  -webkit-align-items: center;
  -ms-flex-align: center;
  align-items: center;
  -webkit-align-content: center;
  -ms-flex-line-pack: center;
  align-content: center;
}

.nav-all .nav img.logo {
  width: 180px;
}

.nav-all .nav ul {
  display: -webkit-box;
  display: -webkit-flex;
  display: -ms-flexbox;
  display: flex;
  -webkit-box-pack: start;
  -webkit-justify-content: flex-start;
  -ms-flex-pack: start;
  justify-content: flex-start;
}

.nav-all .nav ul li {
  margin-left: 25px;
}

.nav-all .nav ul li a {
  font-size: 18px;
  color: #ffffff;
  transition: 0.5s;
}

.nav-all .nav ul li a.active,
.nav-all .nav ul li a:hover {
  color: #358ff0;
}

.footer {
  background-color: #535353;
  padding: 20px 0;
  min-width: 1200px;
}

.footer p {
  color: #6475c7;
  font-size: 16px;
  text-align: center;
  margin: 25px 0;
}

.footer a {
  color: #6475c7;
}

.footer a:hover {
  color: red;
}

.footer i {
  margin: 0 10px;
}

.flex_top {
  display: none;
  position: fixed;
  right: 60px;
  bottom: 15%;
  width: 45px;
  height: 45px;
  background: rgba(0, 0, 0, 0.5) url("../img/top_1.png") no-repeat center center;
  background-size: 25px auto;
  cursor: pointer;
  border-radius: 10px;
  z-index: 999;
}

.flex_top:hover {
  background: #358ff0 url("../img/top_1.png") no-repeat center center / cover;
  background-size: 25px auto;
}

.fixed {
  position: fixed;
  top: 0;
  z-index: 999;
}