body,
html,
ul,
li,
.div {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

li {
  list-style: none;
}

html,
body {
  min-width: 1600px;
}

a:hover,
a:link,
a:visited,
a:active,
a:focus {
  text-decoration: none;
}

.c {
  position: relative;
  width: 1200px;
  height: 100%;
  margin: 0 auto;
}

.c a,
a:hover,
a:link,
a:visited,
a:active,
a:focus {
  text-decoration: none;
  color: #ffffff;
}

header {
  height: 335px;
  width: 100%;
  margin: 0 auto;
}

header .logo {
  margin: 0 auto;

  height: 250px;
  background-color: #ffffff;
  background-image: url("../img/header.jpg");
  background-repeat: no-repeat;
  background-size: cover;
  background-position: center center;
}

header .logo .search {
  position: absolute;
  top: 40px;
  right: 0px;
  width: 330px;
  height: 40px;
  border-radius: 20px;
  background-color: #f5f5f7;
  padding: 0 10px;
}

header .logo .search .text {
  position: absolute;
  top: 0;
  margin: 0;
  padding: 0;
  width: 280px;
  height: 40px;
  border: 0;
  background: none;
}

header .logo .search .btn {
  position: absolute;
  right: 10px;
  height: 30px;
  margin: 5px;
}

header .nav {
  height: 45px;
  background-color: #21518e;
  font-size: 16px;
}

header .nav .nav_bar {
  display: flex;
  flex-wrap: wrap;
}

header .nav a {
  display: block;
  flex: 1;
  height: 45px;
  line-height: 45px;
  color: #ffffff;
}

header .nav a a:hover,
a:link,
a:visited,
a:active,
a:focus {
  color: #ffffff;
  text-decoration: none;
}

header .nav .item {
  color: #ffffff;
  text-align: center;
  cursor: pointer;
}

header .nav .item:hover {
  background-color: #ed2c25;
  height: 45px;
  line-height: 45px;
  color: #ffffff;
  text-align: center;
  cursor: pointer;
}

footer {
  min-width: 1200px;
  display: flex;
  height: 120px;
  background-color: #015293;
  color: #fff;
  justify-content: center;
  flex-direction: column;
  align-items: center;
  margin-top: 10px;
}

footer p {
  display: block;
  height: 30px;
  margin: 0 auto;
  font-size: 18px;
  font-weight: bold;
  text-align: justify;
  color: #dfdfdf;
}

footer p span {
  margin: 0 8px;
}

.link {
  height: 150px;
  border: 1px solid #d3d3d3;
  border-radius: 10px;
  margin-top: 10px;
}

.link .friends {
  float: left;
  width: 800px;
  display: flex;
  flex-wrap: nowrap;
  justify-content: center;
  align-items: center;
  height: 100%;
}

.link .friends a {
  display: block;
  flex: 1;
  height: 120px;
  margin: 0 10px;
  border-right: 1px solid #d3d3d3;
  padding: 0;
}

.link .friends .group {
  width: 100%;
  cursor: pointer;
  overflow: hidden;
}

.link .friends .group img {
  margin: 0 auto;
  display: block;
}

.link .friends .group .sv {
  filter: drop-shadow(#b6b6b6 500px 0);
  transform: translateX(-500px);
}

.link .friends p {
  padding: 0;
  margin: 0;
  color: #000000;
  width: 100%;
  text-align: center;
}

.link .search {
  float: left;
  width: 400px;
}

.link .search .input {
  width: 100%;
  height: 40px;
  margin: 40px 0 0 0;
}

.link .search .input input {
  width: 90%;
  height: 100%;
  padding: 0 10px;
}

.link .search .submit {
  margin-top: 10px;
  text-align: center;
}

.link .search .keywordsBtn {
  width: 150px;
  height: 35px;
  background-color: #21518e;
  color: #ffffff;
  font-size: 16px;
  margin: 5px auto;
  padding: 0 20px;
}

@keyframes fadeIn {
  from {
    opacity: 0;
  }

  to {
    opacity: 1;
  }
}