* {
  padding: 0;
  margin: 0;
}
ul,
li {
  padding: 0;
  margin: 0;
  list-style: none;
}
a:link,
a:visited,
a:hover,
a:active{
  text-decoration: none;
}

/* 布局 */
.content {
  width: 100vw;
  min-height: 100vh;
  overflow-x: hidden;
  background-color: #ffffff62;
}

.warp {
  width: 1200px;
  margin: auto;
  min-height: 100vh;
}

/* 头部 */
header {
  padding: 35px 0;
  position: fixed;
  top: 0;
  width: 100%;
  margin: auto;
}

.header-warp {
  width: 1200px;
  margin: auto;
  display: flex;
  justify-content: space-between;
}

.logo {
  /*width: 450px;*/
  height: 50px;
}

.menu {
  display: flex;
  align-items: center;
  color: #222;
  margin-left: 210px;
}

.menu-item {
  display: inline-block;
  margin: 0 30px;
  font-size: 18px;
  line-height: 40px;
  cursor: pointer;
  color: #333;
}

.menu-item-active {
  color: #fff;
  border-bottom: 2px solid #fff;
}

/* 底部 */
footer {
  min-height: 140px;
  width: 100%;
  background-color: #ffffff6c;
  color: #222;
  display: flex;
  flex-direction: column;
  align-items: center;
  line-height: 30px;
}

footer a {
  color: #222;
}

.back {
    display: inline-block;
    width: 2px;
    height: 13px;
    background-color: #222;
    margin: 0 10px;
}