html,
body {
  margin: 0;
  width: 100%;
  height: 100%;
  /* overflow-y: hidden; */
  background: black;
  background: linear-gradient(to bottom, #000000 0%, #5788fe 100%);

  /* font-family: "Questrial", "Noto Serif SC"; */
}
.outer-container {
  /* width: 360px; */
  /* height: 200px; */
  position: relative;
  overflow: hidden;
}
.filter {
  width: 100%;
  height: 100%;
  position: absolute;
  top: 0;
  left: 0;
  background: #fe5757;
  animation: colorChange 30s ease-in-out infinite;
  animation-fill-mode: both;
  mix-blend-mode: overlay;
}

@keyframes colorChange {
  0%,
  100% {
    opacity: 0;
  }
  50% {
    opacity: 0.9;
  }
}

.landscape {
  position: absolute;
  bottom: 0px;
  left: 0;
  width: 100%;
  height: 100%;
  /* background-image: url("../images/xkbg.png"); */
  /* background-size: 1000px 250px; */
  background-repeat: repeat-x;
  background-position: center bottom;
}
.content {
  -moz-user-select: none;
  -webkit-user-select: none;
  -ms-user-select: none;
  -khtml-user-select: none;
  user-select: none;
  text-align: center;
  color: #fff;
  /* transform: translate(-50%, -50%); */
  z-index: 9999;

  position: absolute;
  left: 0;
  top: 0;
  right: -17px;
  bottom: 0;
  overflow-x: hidden;
  overflow-y: scroll;
}
.content .title {
  margin: 15px 0;
  font-size: 2.5em;
  letter-spacing: 4px;
  color: #fff;
}
.content .hr {
  width: 50%;
  margin: 20px auto;
  border: none;
  border-top: 1px solid rgba(255, 255, 255, 1);
  height: 1px;
}
.content .discription {
  font-size: 20px;
  margin: 20px;
}
.cover-navigation {
  /* margin: 30px; */
}

nav {
  display: inline-block;
  position: relative;
}
.navigation {
  display: inline-block;
  position: relative;
  margin: 0;
  list-style-type: none;
}
.navigation__item {
  display: inline-block;
  line-height: 1em;
  padding: 1em 0;
}
.navigation__item a {
  position: relative;
  color: #fff;
  opacity: 0.8;
  transition: all 0.3s;
  padding: 10px 20px;
  border: 1px solid #fff;
  border-radius: 20px;
  font-size: 0.9em;
  font-weight: bold;
  letter-spacing: 1px;
  text-shadow: none;
  -webkit-font-smoothing: antialiased;
  text-decoration: none;
}
.navigation__item a:hover {
  color: #fff;
  background: #ff7f00;
  border-color: #ff7f00;
  opacity: 1;
  transition: all 0.3s;
}
ol,
ul {
  list-style: none;
  margin: 0;
  padding: 0;
  border: 0;
  font-size: 100%;
  font: inherit;
  vertical-align: baseline;
}
.icp {
  margin: 20px;
}
.icpnum {
  color: #fff;
  text-decoration: none;
}
/* 打开和关闭手风琴面板的样式 */
.accordion {
  background-color: transparent;
  color: #fff;
  opacity: 0.8;
  transition: all 0.3s;
  padding: 15px 30px;
  margin: 5px 0px;
  border: 1px solid #fff;
  border-radius: 30px;
  cursor: pointer;
  width: 33%;
  text-align: center;
  font-size: 120%;
  transition: 0.4s;
}
.accordion2 {
  background-color: transparent;
  color: #fff;
  opacity: 0.8;
  transition: all 0.3s;
  padding: 15px 30px;
  margin: 5px 0px;
  border: none;
  border-radius: 0;
  cursor: pointer;
  width: 33%;
  text-align: center;
  font-size: 120%;
  transition: 0.4s;
}

/* 设置点击和鼠标移到选项上面时（悬停）的样式 */
.active {
  background-color: steelblue;
}
.active:hover,
.accordion:hover {
  background-color: #ff7f00;
  border-color: #ff7f00;
}

/* 为手风琴面板设计样式。 默认隐藏 */
.panel {
  padding: 0 18px;
  /* background-color: white; */
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.2s ease-out;
}
/* 设置 +、- 标志 */

.accordion:before {
  content: "\002B"; /* Unicode 字符 + 号 */
  /* color: #777; */
  font-weight: bold;
  float: left;
  margin-left: 5px;
}

.accordion:after {
  content: "\002B"; /* Unicode 字符 + 号 */
  /* color: #777; */
  font-weight: bold;
  float: right;
  margin-left: 5px;
}

.active:before {
  content: "\2212"; /* Unicode 字符 - 号 */
}

.active:after {
  content: "\2212"; /* Unicode 字符 - 号 */
}