* {
  margin: 0;
  padding: 0;
  font-size: 14px;
  box-sizing: content-box;
}

html,
body {
  width: 100%;
  height: 100%;
  user-select: none;
}

#bg {
  width: 100%;
  min-width: 250px;
  height: 100%;
  position: fixed;
  z-index: 1;
}

.container {
  width: 100%;
  min-width: 250px;
  min-height: 100%;
  position: relative;
  z-index: 10;
  color: #fff;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.container .avatar {
  width: 80px;
  height: 80px;
  margin-top: 30%;
  border-radius: 50%;
  border: 1px solid #f6f7fb;
  opacity: 0.6;
}

.container .nickname {
  font-size: 18px;
  margin-top: 20px;
  letter-spacing: 2px;
  animation: nickname-shadow 2s ease-in-out infinite alternate;
}

@keyframes nickname-shadow {
  from {
    text-shadow: 0 0 2px #f6f7fb;
  }

  to {
    text-shadow: 1px 1px 20px #f6f7fb;
  }
}


.container .introduce {
  font-size: 14px;
  margin-top: 20px;
  padding: 0 28px;
  letter-spacing: 1px;
  text-align: center;
  line-height: 28px;
}

.container .quote {
  font-size: 14px;
  margin-top: 20px;
  padding: 0 28px;
  letter-spacing: 1px;
  text-align: center;
  font-family: cursive;
  line-height: 28px;
}

.container .quote::after {
  content: '';
  display: inline-block;
  width: 2px;
  height: 18px;
  border-radius: 2px;
  background-color: #fff;
  vertical-align: middle;
  animation: blink 0.8s linear infinite;
}

@keyframes blink {
  0% {
    opacity: 1;
  }

  50% {
    opacity: 0;
  }

  100% {
    opacity: 1;
  }
}

nav {
  width: 80%;
  min-height: 40px;
  margin-top: 80px;
  display: flex;
  flex-direction: row;
  flex-wrap: wrap;
  justify-content: center;
  align-items: center;
}

nav .item {
  width: 28px;
  height: 28px;
  margin: 8px 12px;
  position: relative;
  display: flex;
  border-radius: 50%;
  background-color: rgba(255, 255, 255, 0.9);
  justify-content: center;
  align-items: center;
}

nav .item a {
  color: #fff;
  text-decoration: none;
  display: block;
  width: 20px;
  height: 20px;
}

nav .item a:focus,
nav .item a:visited,
nav .item a:active {
  color: #fff;
}

nav .item a img {
  width: 100%;
  height: 100%;
}

nav .item .tooltip {
  position: absolute;
  width: 80px;
  max-height: 80px;
  background-color: rgb(255, 255, 255);
  bottom: 40px;
  padding: 4px;
  border-radius: 4px;
  z-index: 10;
  color: #333;
  letter-spacing: 2px;
  text-align: center;
  opacity: 0;
  z-index: -1;
  transform: translateY(-40px);
  transition: all 0.1s ease-in-out;
}

nav .item .tooltip img {
  width: 100%;
  height: 100%;
  position: relative;
  z-index: 10;
}

nav .item .tooltip::after {
  content: '';
  display: block;
  width: 8px;
  height: 8px;
  border-radius: 2px;
  background-color: rgb(255, 255, 255);
  position: absolute;
  bottom: -4px;
  left: 40px;
  transform: rotate(45deg);
  z-index: 9;
}


nav .item a:focus+.tooltip,
nav .item a:hover+.tooltip {
  transform: translateY(0);
  z-index: 10;
  opacity: 1;
}

footer {
  width: 80%;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  padding: 20px 0;
  margin-top: 40px;
}

footer .icp {
  color: #f6f7fb;
  text-decoration: none;
  letter-spacing: 2px;
  font-size: 10px;
}


footer .copyright {
  color: #999;
  font-size: 10px;
  margin-top: 8px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

@media screen and (min-width:768px) {
  .container .avatar {
    width: 88px;
    height: 88px;
    margin-top: 20%;
  }

  .container .nickname {
    font-size: 20px;
    margin-top: 28px;
  }

  .container .introduce {
    font-size: 16px;
    margin-top: 28px;
    padding: 0 40px;
  }

  .container .quote {
    font-size: 16px;
    margin-top: 28px;
    padding: 0 40px;
  }

  .container .quote::after {
    height: 20px;
  }

  nav {
    margin-top: 90px;
  }

  nav .item {
    width: 32px;
    height: 32px;
  }

  nav .item .tooltip {
    bottom: 48px;
  }

  nav .item a {
    width: 22px;
    height: 22px;
  }
}

@media screen and (min-width:992px) {
  .container .avatar {
    width: 96px;
    height: 96px;
    margin-top: 10%;
  }

  .container .nickname {
    font-size: 22px;
    margin-top: 32px;
  }

  .container .introduce {
    font-size: 18px;
    margin-top: 36px;
    padding: 0 80px;
  }

  .container .quote {
    font-size: 18px;
    margin-top: 36px;
    padding: 0 80px;
  }


  .container .quote::after {
    height: 22px;
  }

  nav {
    margin-top: 100px;
  }

  nav .item {
    width: 36px;
    height: 36px;
    margin: 12px;
  }

  nav .item .tooltip {
    bottom: 56px;
  }

  nav .item a {
    width: 24px;
    height: 24px;
  }
}