* {
  margin: 0;
  padding: 0;
}
h1 {
  text-align: center;
  color: #000000;
  font-size: 36px;
  font-family: "宋体", Arial;
  text-shadow: #FC0 1px 0 10px;
  padding: 10px;
}
body {
  background: rgba(147, 229, 243, 0.29);
  margin: 0 auto;
  font-size: 14px;
  color: #333;
  position: relative;
  padding-top: 50px;
  padding-bottom: 50px;
}
a {
  cursor: pointer;
  color: #333;
  text-decoration: none;
  outline: none;
}
ul {
  list-style-type: none;
}
div.clear {
  font: 0px Arial;
  line-height: 0;
  height: 0;
  overflow: hidden;
  clear: both;
}
.clearfix::after {
  content: "";
  display: block;
  clear: both;
}
/*wrapin 主体容器宽度*/
.wrapin {
  width: 1000px;
  margin-left: auto;
  margin-right: auto;
}
.imgtop{
  width:1000px;
  height: auto;
  align-items: center;
  position: relative;
}
header {
  height: 50px;
  background: #ebffe9;
  border-bottom: 1px solid #ccc;
}
.nav li {
  line-height: 50px;
  float: left;
  width: 16.66%;
  text-align: center;
  font-size: 16px;
}
.nav li a {
  color: #333;
}
footer {
  background: #282828;
  text-align: center;
  color: #fff;
  margin-top: 30px;
  line-height: 50px;
}

h3{
  text-align: left;
  color: #0a90e8;
  font-size: 30px;
  padding: 25px;

}
.image-container {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
}
.image-container img {
  width: calc(25% - 25px); /* 设置图片宽度为容器宽度的4分之一，减去间距 */
  height: 380px;
  margin: 5px;
}
.image-container2 {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
}
.image-container2 img {
  width: calc(33% - 25px);
  height: auto;
  margin: 25px 5px 5px 15px;
}
.modal {
  display: none;
  position: fixed;
  z-index: 9999;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.8);
}
.modal-image {
  display: block;
  max-width: 90%;
  max-height: 90%;
  margin-left: 8%;
  margin-top: 4%;
}
.box {
  transition: all 0.4s; /*设置上浮过渡时间*/
}
.box:hover {
  box-shadow: 0 8px 8px 0 grey;
  transform: translate(0, -10px);
  transform: scale(1.2)
}