*{
  user-select: none;
}
.w {
  width: 1200px;
  margin: 0 auto;
}
header {
  position: relative;
  height: 80px;
  background-color: #2b231d;
  z-index: 10;
}

.logo {
  float: left;
  margin-left: 80px;
  margin-top: -6px;
}
.logo h1 a {
  display: block;
  width: 130px;
  height: 100px;
  /* background: url(../images/logo.png) no-repeat; */
  background-size: 130px auto;
  font-size: 0;
}
/* 导航栏部分 */

.nav ul {
  height: 100%;
  margin-left: 140px;
}
.nav ul li {
  height: 100%;
  padding: 0 60px;
  float: left;
  text-align: center;
  margin-top: 15px;
}

.nav ul li a {
  color: #fff;
}
.nav ul li a span {
  position: relative;
  display: block;
}

.nav ul li a:hover span:first-child::before{
  position: absolute;
  content: '';
  width: 55px;
  height: 4px;
  top: -15px;
  left: -4px;
  background-color: #fff;
}
.select_pages a span:first-child::before{
  position: absolute;
  content: '';
  width: 55px;
  height: 4px;
  top: -15px;
  left: -4px;
  background-color: #fff;
}
.nav ul li a span:first-of-type {
  font-size: 24px;
}
footer{
 position: relative; 
  height: 120px;
  background-color: #000;
}
.copyright{
  position: absolute;
 top: -1px;
 left: 50%; 
 transform: translate(-50%);
 width: 1579px;
}

.copyright img{
  position: absolute;
  top: 17px;
  left: 400px;
}
.copyright p{
  position: absolute;
  top: 40px;
  left: 557px;
  width: 550px;
  text-align: center;
  font-size: 14px;
  color: #999;
   letter-spacing: 1px;  
}