* {
  margin: 0;
  padding: 0;
  list-style: none;
}

.bg {
  width: 100%;
  background-image: url(../image/bg.jpg);
  background-size: 100% 100%;
  position: fixed;
  top: 0;
  bottom: 0;
  left: 0;
  margin: auto;
}

.bg .button {
  width: 240px;
  height: 130px;
  position: absolute;
  top: 80px;
  left: 150px;
}

.bg .button li {
  width: 100%;
  height: 57px;
  margin-bottom: 16px;
  background-size: contain;
  background-repeat: no-repeat;
  background-position: 4px 0;
  cursor: pointer;
  transform: scale(0, 0);
  transition: transform .4s ease;
}

.bg .button li.active {
  transform: scale(1, 1);
}

.bg .button .list-play {
  background-image: url(../image/play.png);
}

.bg .button .list-replay {
  background-image: url(../image/replay-btn.png);
}

.bg .container {
  width: 100%;
  height: 100%;
  z-index: 999;
  position: absolute;
  background: rgba(0, 0, 0, 0.4);
}

.bg .container .open {
  width: 200px;
  height: 260px;
  background-size: contain;
  background-repeat: no-repeat;
  position: absolute;
  top: 0;
  bottom: 0;
  left: 0;
  right: 0;
  margin: auto;
  z-index: 999;
  display: none;
}

.bg .container .begin {
  background-image: url(../image/one.png);
}

.bg .container .play-img {
  background-image: url(../image/two.png);
  background-position: 0 6px;
}

.bg .container .underdog {
  background-image: url(../image/underdog.png);
}

.bg .container .btn {
  width: 245px;
  height: 55px;
  position: absolute;
  bottom: 120px;
  left: 0;
  right: 0;
  margin: 0 auto;
  background-position: 10px 0;
  cursor: pointer;
  display: none;
}

.bg .container .begin-btn {
  background-image: url(../image/begin-btn.png);
}

.bg .container .play-btn {
  background-image: url(../image/play-btn.png);
}

.bg .container .replay-btn {
  background-image: url(../image/replay.png);
}

.bg .box {
  width: 500px;
  height: 500px;
  background: linear-gradient(#4DFFCD, #b6ffec);
  position: fixed;
  top: 0;
  bottom: 0;
  left: 0;
  right: 0;
  margin: auto;
  transform: scale(0, 0);
  transition: transform .4s ease;
}

.bg .box.active {
  transform: scale(1, 1);
}

.bg .block {
  width: 25px;
  height: 25px;
  float: left;
}

.bg .she {
  width: 25px;
  height: 25px;
  background-color: #fff;
  border-radius: 50%;
}

.bg .food {
  width: 25px;
  height: 25px;
  background-color: #bfff00;
  border-radius: 50%;
  transition: opacity .8s ease,transform .8s ease;
}

.bg .food.food-active {
  opacity: 0.8;
  transform: scale(1.2, 1.2);
}