* {
  margin: 0;
  padding: 0;
}
a {
  text-decoration: none;
  color: black;
}
a:hover {
  text-decoration: none;
  color: black;
}
a:active {
  text-decoration: none;
  color: black;
}
ul,
ol,
li {
  list-style: none;
}
.nav {
  width: 100%;
  height: 50px;
  clear: both;
  background: #f3f3f3;
}
.nav ul {
  width: 1200px;
  margin: 0 auto;
}
.nav ul li {
  float: left;
  text-align: center;
  position: relative;
}
.nav ul li a {
  width: 127px;
  line-height: 50px;
  height: 50px;
  font-size: 18px;
  color: #181818;
  display: inline-block;
}
.nav ul li ul {
  display: none;
}
.nav ul li ul li {
  float: left;
  text-align: center;
  position: relative;
}
.nav ul li ul li a {
  width: 150px;
  line-height: 50px;
  height: 50px;
  font-size: 18px;
  color: #181818;
  display: inline-block;
}
.nav ul li:hover ul {
  text-align: center;
  display: inline-block;
  position: absolute;
  top: 50px;
  left: -525px;
  z-index: 1000;
}
.nav ul li:hover ul li {
  float: none;
}
.nav ul li:hover ul li a {
  display: inline-block;
  color: #626262;
  opacity: 0.9;
  font-size: 14px;
  width: 260px;
  height: 50px;
  line-height: 50px;
  text-align: center;
  border: none;
  background-color: #f5f9ff;
}
.nav ul li:hover a {
  color: #fff;
  background: #a01414;
}