@charset "UTF-8";
html,
body {
  margin: 0;
  padding: 0;
  height: 100%;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Segoe UI", "Helvetica Neue", "PingFang SC", "San Francisco", "Microsoft YaHei", 微软雅黑, sans-serif;
  background: #fafafa;
  font-size: 16px;
}

a {
  text-decoration: none;
  color: #333;
}

h1,
h2, p {
  margin: 0;
  padding: 0;
}

ul, ol, li {
  list-style: none;
  list-style-type: none;
  list-style: none;
  margin: 0;
  padding: 0;
}

img, input, select {
  border: 0 none;
  outline-style: none;
  padding: 0;
  margin: 0;
  vertical-align: middle;
  max-width: 100%;
}

#nav {
  width: 100%;
  background-color: #279AFE;
  padding: 20px 0;
}

#nav > div {
  width: 100%;
  max-width: 1200px;
  display: flex;
  justify-content: space-between;
  line-height: 40px;
  margin: 0 auto;
  background-color: #279AFE;
}

#nav > div #logo a {
  display: flex;
  font-size: 25px;
  color: white;
  font-weight: bold;
}

#nav > div #logo a span {
  position: relative;
}

#nav > div #logo a span::after {
  position: absolute;
  bottom: -10px;
  right: 0;
  content: "COMPUTER EXAM NETWORK";
  font-weight: normal;
  font-size: 10px;
}

#nav > div #logo a img {
  height: 50px;
  margin-right: 10px;
}

#nav > div .option a {
  font-size: 14px;
  color: white;
}

.model > .title {
  width: 1200px;
  margin: 0 auto;
  color: #000;
  text-align: left;
  margin: auto;
  margin-top: 50px;
  margin-bottom: 30px;
  font-size: 20px;
  font-weight: bold;
  padding-left: 3mm;
  position: relative;
}

.model > .title::before {
  position: absolute;
  left: 0px;
  content: "";
  border-top: 3px solid #279AFE;
  border-left: 3px solid #279AFE;
  height: 10px;
  width: 10px;
  top: 0px;
}

.model > .title::after {
  position: absolute;
  content: "";
  border-right: 3px solid #279AFE;
  border-bottom: 3px solid #279AFE;
  height: 10px;
  width: 10px;
  bottom: 0px;
  margin-right: 3mm;
}

.model > .subject {
  margin-top: 50px;
}

.model > .subject .name {
  width: 1200px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  line-height: 40px;
  border-bottom: 1px solid #279AFE;
}

.model > .subject .name h2 {
  background-color: #279AFE;
  padding: 0 10px;
  font-size: 18px;
  color: #fff;
  border-top-left-radius: 5px;
  border-top-right-radius: 5px;
}

.model > .subject .name p {
  font-size: 14px;
}

.model > .subject .course {
  width: 1200px;
  margin: 0 auto;
  overflow: hidden;
}

.model > .subject .course > .list {
  width: 1500px;
  height: auto;
  overflow: hidden;
  padding-bottom: 10px;
}

.model > .subject .course > .list a {
  display: inline-block;
  transition: .4s;
  border-radius: 5px;
  overflow: hidden;
  width: 281px;
  height: 100px;
  line-height: 100px;
  margin-right: 20px;
  margin-top: 20px;
  box-shadow: 0px 2px 5px 0px #c0c0c2;
  text-align: center;
  font-size: 16px;
}

.model > .subject .course > .list a:hover {
  box-shadow: 0px 2px 5px 0px rgba(254, 187, 0, 0.3);
  transform: translateY(-5px);
  background: #dff0ff;
  font-weight: bold;
}

.footer_bottom {
  text-align: center;
  padding: 10px 0;
  border-top: 1px solid #42484d;
  font-size: 14px;
  color: #999999;
  background-color: #363c41;
  margin-top: 30px;
  width: 100%;
  bottom: 0;
}

.footer_bottom p {
  line-height: 50px;
  margin: 0 auto;
  display: inline-block;
  vertical-align: middle;
}

.footer_bottom p a {
  color: #999 !important;
}

@media (max-width: 900px) {
  #nav #logo span {
    display: none;
  }
  .guide {
    height: auto;
    overflow: hidden;
  }
  .guide::after {
    height: 400px;
  }
  .guide .main {
    display: block;
    margin-top: 60px;
  }
  .guide .main .l {
    display: block;
    font-size: 18px;
    text-align: center;
    height: auto;
  }
  .guide .main .r {
    width: 98%;
    margin: 0 auto;
    margin-top: 20px;
    height: auto;
  }
  .guide .main .r > div:first-child {
    height: 80px;
  }
  .guide .main .r > div:first-child img {
    height: 200px;
  }
  .guide .main .r > div:first-child h1 {
    font-size: 18px;
  }
  .guide .main .r > div:nth-child(2) h1 {
    font-size: 16px;
    margin: 10px 0;
  }
  .guide .main .r > div:nth-child(2) button {
    margin: 10px 0;
  }
  .course {
    display: block;
    width: 100%;
  }
  .course .item {
    width: 96%;
    margin: auto;
    margin-bottom: 25px;
    height: auto;
  }
  .course .item > a img {
    width: 100%;
  }
}