* {
  margin: 0;
  padding: 0;
}
a {
  text-decoration: none;
}
ul,
ol,
li {
  list-style: none;
}
img {
  width: 100%;
  height: 100%;
}
input,
textarea {
  outline: none;
}
body {
  background: url(../img/body_ba.png) no-repeat;
  background-size: cover;
  background-size: 100% 370px;
  background-color: #f5f6fa;
}
.w1200 {
  width: 1200px;
  margin: 0 auto;
}
header {
  display: flex;
  align-items: center;
  /* justify-content: center; */
  padding-top: 24px;
  box-sizing: border-box;
}
header .logo {
  width: 124px;
  height: 40px;
}
header nav {
  display: flex;
  align-items: center;
  height: 44px;
}
header nav a {
  margin-left: 36px;
  color: #1f1f25;
  font-size: 16px;
}
header nav a.active {
  font-size: 16px;
  font-weight: 700;
  position: relative;
}
header nav a.active::after {
  content: '';
  display: inline-block;
  width: 30px;
  height: 12px;
  position: absolute;
  background: url(../img/link_active.png) no-repeat;
  background-size: contain;
  bottom: -15px;
  left: 50%;
  transform: translateX(-50%);
}
header .troll {
  width: 288px;
  height: 40px;
  background: #fff;
  border-radius: 20px;
  margin-left: auto;
  display: flex;
  align-items: center;
  display: none;
}
header .troll input {
  display: block;
  border: 0;
  padding-left: 18px;
  width: 232px;
  line-height: 38px;
  height: 40px;
  background: transparent;
  font-size: 16px;
  color: #999;
}
header .troll i {
  display: inline-block;
  width: 20px;
  height: 20px;
  background: url(../img/head_sea.png) no-repeat;
  background-size: contain;
  margin-left: auto;
  margin-right: 20px;
}
header .top_sea {
  display: none;
}
/* 底部 */
footer {
  width: 100%;
  color: #666;
  font-size: 14px;
  background-color: #202020;
  text-align: center;
}

footer > div:nth-of-type(2) {
  padding-top: 15px;
  height: 45px;
  background-color: #1d1d1c;
  line-height: 30px;
}

footer > div:nth-of-type(2) a {
  font-size: 14px;
  color: #999;
}

footer > div:nth-of-type(1) div {
  width: 1200px;
  margin: 0 auto;
  height: auto;
  padding: 30px 0 15px;
  line-height: 24px;
}

footer > div:nth-of-type(1) div p:nth-of-type(1) a {
  font-size: 14px;
  color: #999;
}

footer p {
  margin-bottom: 10px;
}

footer p a {
  margin: 0 5px;
  color: #999;
}

footer p span {
  margin: 0 10px;
}

footer div img {
  width: 30px;
  height: 30px;
  margin: 0 10px 0 50px;
}

footer div a:hover {
  color: #cfcfcf !important;
}
.pc_none {
  display: none !important;
}
.none_down {
  display: block;
}
@media screen and (max-width: 750px) {
  .none_down {
    display: none !important;
  }
  .pc_none {
    display: block !important;
  }
  .w1200 {
    width: 100%;
  }
  header {
    flex-direction: column;
    padding: 12px;
    position: relative;
  }
  header > a {
    align-self: flex-start;
  }
  header nav {
    width: 100%;
    overflow: hidden;
    overflow-x: scroll;
    margin-top: -6px;
  }
  header nav a {
    white-space: nowrap;
    margin-left: unset;
    margin-right: 24px;
  }
  header .top_sea {
    display: inline-block;
    width: 36px;
    height: 36px;
    position: absolute;
    top: 12px;
    right: 12px;
    background: url(../img/top_sea.png) no-repeat;
    background-size: contain;
    display: none;
  }
  footer > div:nth-of-type(1) div {
    width: 100%;
  }
  footer p {
    font-size: 12px;
    color: #9c9fac;
  }
  footer a {
    color: #9c9fac;
  }
}