*{
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}
body{
  width: 100vw;
  height: 100vh;
  overflow: hidden;
  display: flex;
  justify-content: center;
  align-items: center;
  flex-direction: column;
  color: #303133;
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  background: url('./bg.png') no-repeat;
  background-size: cover;
  background-position: center;
   background-attachment:fixed;
}

.page {
  width: 78%;
  height: 80%;
  overflow: hidden;
  display: flex;
  align-items: center;
}
.page .logo,
.page .hint{
  width: 50%;
  height: 100%;
  color: #fff;
  /* border: 1px solid red; */
  display: flex;
  align-items: center;
  justify-content: center;
  flex-direction: column;
}
.page .hint {
  width: 32%;
  height: 70%;
  justify-content: center;
  border-radius: 8px;
  background: rgba(255, 255, 255, .2);
  box-shadow: 0 20px 40px 1px rgba(0, 0, 0, 0.12);
}
.bottom {
  width: 100%;
  height: 20%;
  font-size: 16px;
  display: flex;
justify-content: center;
align-items: end;
}
.bottom p {
  width: 100%;
  height: 30%;
  display: flex;
  justify-content: center;
  align-items: end;
  color: #5f696e;
  background-color: #1f1f1f;
  display: flex;
  align-items: center;
}
.bottom p span{
  display: flex;
  align-items: center;
}
#beian {
  cursor: pointer;
}

#nestos {
  font-size: 44px;
  text-shadow: 2px 4px 4px rgba(0, 0, 0, 0.2); 
}
#nestos-desc {
  font-size: 24px;
  line-height: 50px;
}
#second {
  font-size: 20px;
}


/* button */
.button{
    position: relative;
    width: 160px;
    height: 50px;
    margin: 0 15px;
    cursor: pointer;
}
.shape{
    fill: none;
    stroke: #009ffd;
    stroke-width: 4;
    stroke-dasharray: 100 400;
    stroke-dashoffset: -240;
    transition: 1s ease;
}
.text{
    position: absolute;
    left: 50%;
    top: 50%;
    transform: translate(-50%,-50%);
    color: #fff;
    letter-spacing: 2px;
}

.button:hover .shape{
    stroke: #39d7ff;
    stroke-width: 3;
    stroke-dasharray: 50 0;
    stroke-dashoffset: 0;
}

.logo-box{
    width: 90%;
    display: flex;
    justify-content: center;
    align-items: center;
    /* 执行动画：动画名 时长 减速 先反向再正向 无限次播放 */
    animation: bounce 0.8s ease-out alternate-reverse infinite;
}
.logo-box img {
  width: 100%;
}
.shadow{
    width: 180px;
    height: 5px;
    border-radius: 50%;
    background-color: rgba(0,0,0,0.4);
    position: absolute;
    bottom: 26%;
    z-index: -1;
    filter: blur(1.5px);
    animation: shadow 0.8s ease-out alternate-reverse infinite;
}

/* 定义动画 */
/* 弹跳的动画 */
@keyframes bounce {
    0%{
        transform: translateY(6vh);
    }
    100%{
        transform: translateY(-10vh);
    }
}
/* 阴影的动画 */
@keyframes shadow {
    0%{
        transform: scale(0.15,1.25);
    }
    100%{
        transform: scale(1.25,0.75);
    }
}