/* -- 区块内部的元素样式和自定义导航按钮样式 (示例) -- */
* {
  margin: 0;
  padding: 0;
}
#my-nav {
  right: 15px;
  top: 50%;
  color: #fff;
  width: 90px;
  height: 160px;
  margin-top: -80px;
}

#my-nav b {
  display: block;
  float: left;
  margin: 5px 0;
  background: #f1f2f3;
  opacity: .5;
  text-align: center;
  color: #000;
  width: 90px;
  height: 30px;
  line-height: 30px;
  font-weight: normal;
  border-radius: 2px;
  cursor: pointer;
}

#my-nav b.active {
  opacity: 1
}

.content {
  padding: 100px calc(15%);
  box-sizing: border-box;
  display: flex;
  justify-content: space-between;
  display: flex;
}

.content ul {
  max-width: 600px;
  padding: 50px 0;
}

.content:nth-child(1) img {
  flex-shrink: 0;
  width: 617px;
  height: 624px;
}

.content ul li {
  margin-top: 50px;
  letter-spacing: 1.5px;
  font-size: 18px;
  box-sizing: border-box;
  /* opacity: 0 */
}

.content:nth-child(1) ul h4 {
  font-size: 50px;
  letter-spacing: 10px;
}

.content:nth-child(1) ul li {
  opacity: 0
}

.content:nth-child(2) div {
  min-width: 600px;
  margin-top: 50px;
  overflow: hidden;
}

.content:nth-child(2) div p {
  margin-bottom: 30px;
  display: flex;
  justify-content: space-between;
}

.content:nth-child(2) div img {
  flex-shrink: 0;
  width: 400px;
  margin: 50px 100px;
  position: relative;
  top: 1000px;
  opacity: 0;
}

.content:nth-child(2) div p span {
  display: inline-block;
  padding: 10px 20px;
  letter-spacing: 1px;
  color: #fff;
  border-radius: 3px;
  font-size: 18px;
}

.content:nth-child(2) ul h3 {
  font-size: 28px;
  display: flex;
  margin-bottom: 90px;
  align-items: center;
}

.content:nth-child(2) ul h3 img {
  width: 32px;
  height: 25px;
  margin-right: 15px;
}

.content:nth-child(2) ul li {
  position: relative;
  left: 5000px
}

.content_activity ul {
  max-width: initial;
  width: 100%;
  display: flex;
  flex-wrap: wrap;
  padding: 300px;
  box-sizing: border-box;
  height: 100vh;
  align-items: center;
  justify-content: space-between;
  overflow: hidden;
}

.content_activity ul li {
  width: 48%;
  list-style: none;
  position: relative;
  height: 45%;
  overflow: hidden;
  cursor: pointer;
  padding: 50px;
  box-sizing: border-box;
}

.content_activity ul li h4 {
  text-align: center;
  font-size: 30px;
  color: #fff;
  letter-spacing: 5px;
}

.content_activity ul li p {
  font-size: 20px;
  color: #fff;
  letter-spacing: 2px;
  text-align: center;
  margin: 30px 100px;
  line-height: 40px;
}

.content_activity ul li img {
  position: absolute;
  display: block;
  width: 100%;
  height: 100%;
  top: 0;
  bottom: 0;
  left: 100%;
}

.content:nth-child(4) .left img {
  width: 300px;
  margin-top: 100px;
}

.content:nth-child(4) .right img {
  width: 100%;
  margin-top: 100px;
}

.content:nth-child(4) .content_title {
  position: absolute;
  width: calc(80% - 200px);
  text-align: center;
  font-size: 40px;
  letter-spacing: 10px;
  color: #444;
}

.content:nth-child(5) h4 {
  font-size: 40px;
  margin-bottom: 60px;
}

.content:nth-child(5) img {
  width: 750px;
  height: 550px;
}

.content:nth-child(5) .btn {
  margin-top: 30vh;
}

#contact_text {
  font-size: 20px;
  margin: 50px 0;
  min-height: 100px;
  text-align: center;
}

.content:nth-child(5) .btn p {
  width: 240px;
  height: 60px;
  line-height: 60px;
  border: 1px solid #e1e1e1;
  text-align: center;
  margin-bottom: 30px;
  cursor: pointer;
  border-radius: 5px;
  font-size: 18px;
}

.content:nth-child(5) .btn p:nth-child(2) {
  background: #3267f2;
  border: 1px solid #3267f2;
  color: #fff;
}

.header img {
  position: absolute;
  width: 350px;
}

.footer {
  position: fixed;
  left: 0;
  right: 0;
  bottom: 10px;
  text-align: center;
  display: flex;
  align-items: center;
  z-index: 999;
}

.footer div {
  width: 400px;
  margin: 0 auto;
  padding: 10px;
}

.footer a {
  display: inline-block;
  text-decoration: none;
  height: 20px;
  line-height: 20px;
}

.footer p {
  float: left;
  height: 20px;
  line-height: 20px;
  margin: 0px 0px 0px 5px;
  color: #666;
}


.footer p img {
  margin-left: 10px;
  position: relative;
  width: 32px;
  height: 24px;
  top: 5px;
}

.footer div:hover a p span {
  color: #3267f2;
}