.back-to-top {
  position: fixed;
  z-index: 2;
  right: -108px;
  bottom: 0;
  width: 108px;
  height: 150px;
  background: url("https://img.yyexe.cn/back-to-top.png") no-repeat 0 0;
  background-size: 108px 450px;
  opacity: 0.6;
  transition: opacity 0.3s, right 0.8s;
}
.back-to-top:hover {
  background-position: 0 -150px;
  opacity: 1;
}
.back-to-top.load {
  right: 0;
}
.back-to-top.ani-leave {
  background-position: 0 -150px;
  animation: ani-leave 390ms ease-in-out;
  animation-fill-mode: forwards;
}
.back-to-top.leaved {
  pointer-events: none;
  background: none;
  transition: none;
}
.back-to-top.ending {
  pointer-events: none;
}
.back-to-top.ending::after {
  opacity: 1;
}
.back-to-top::after {
  content: '';
  position: fixed;
  z-index: 2;
  right: 0;
  bottom: 0;
  width: 108px;
  height: 150px;
  background: url("https://img.yyexe.cn/back-to-top.png") no-repeat 0 0;
  background-size: 108px 450px;
  background-position: 0 -300px;
  transition: opacity 0.3s;
  opacity: 0;
  pointer-events: none;
}
#Snow {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 999;
  background: rgba(125,137,95,0.1);
  pointer-events: none;
}
@media screen and (max-width: 800px) {
  .hd {
    width: 95%;
    margin: auto;
  }
  .logodiv {
    margin-top: 20px;
  }
  .posts .replay-btn {
    display: none;
  }
  .posttime {
    display: none;
  }
  .posts .post-title {
    font-size: 16px;
  }
  .postname {
    max-width: 100%;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
  }
  .about-avatar {
    right: -20px;
    top: -20px;
    transform: scale(0.6);
  }
  footer {
    font-size: 12px;
  }
}
@-moz-keyframes ani-leave {
  0% {
    transform: translateX(0);
  }
  100% {
    transform: translateX(108px);
  }
}
@-webkit-keyframes ani-leave {
  0% {
    transform: translateX(0);
  }
  100% {
    transform: translateX(108px);
  }
}
@-o-keyframes ani-leave {
  0% {
    transform: translateX(0);
  }
  100% {
    transform: translateX(108px);
  }
}
@keyframes ani-leave {
  0% {
    transform: translateX(0);
  }
  100% {
    transform: translateX(108px);
  }
}