body, ul, li {
  margin: 0;
  padding: 0;
}

ul, li {
  list-style: none;
}

.beijing {
  background: url(../image/bj.jpg);
  background-position: 0 0;
  animation: cloudmove 10s linear infinite;
}

@keyframes cloudmove {
  from {
    background-position: 0 0;
  }
  to {
    background-position: -1000px 0;
  }
}

#canvas {
  display: block;
  border: 1px solid black;
  position: fixed;
  margin: auto;
  top: 0;
  bottom: 0;
  left: 0;
  right: 0;
  background: #AF6D47;
}

.cartel {
  display: none;
  position: absolute;
  top: 0;
  bottom: 0;
  right: 0;
  left: 0;
  background: rgba(0, 0, 0, 0.7);
  width: 100%;
  height: 100%;
}

.cartel .tips {
  width: 600px;
  background: #fff;
  height: 300px;
  position: absolute;
  top: 0;
  bottom: 0;
  left: 0;
  right: 0;
  margin: auto;
  text-align: center;
}

.cartel .tips #close::after {
  opacity: 0;
  transform: scale(0.8, 0.8);
  transition: transform .6s ease, opacity .6s ease;
  content: 'X';
  border-radius: 50%;
  width: 30px;
  height: 30px;
  position: absolute;
  right: -15px;
  top: -15px;
  background: black;
  color: #fff;
  text-align: center;
  line-height: 30px;
  font-family: "consolas";
}

.cartel .tips:hover #close::after {
  opacity: 1;
  transform: none;
}

.cartel .tips #tishi {
  margin-top: 50px;
  font-size: 30px;
}

.cartel .tips span {
  width: 100px;
  height: 30px;
  cursor: pointer;
  text-align: center;
  line-height: 30px;
  margin-top: 50px;
  display: inline-block;
  color: #fff;
  background: url(../image/anniu.png);
}

.cartel .tips #qipu {
  margin-left: 20px;
}