/*公共样式表*/
h1, h2, h3, h4, h5, p, pre, hr, ol, ul, dl, dd, body {
  margin:0;
  padding:0;
  box-sizing: border-box;
}

* {
  box-sizing: border-box;
  margin:0;
  padding:0;
}

u, s, a {
  text-decoration:none;
}

a {
  color:black;
}

ul,ol {
  list-style:none;
}

::-webkit-scrollbar {
  width: 5px;
  height: 5px;
}
::-webkit-scrollbar-thumb {
  border-radius: 5px;
  background-color: rgb(123, 117, 128);
}
::-webkit-scrollbar-track {
  box-shadow: inset 0 0 5px rgba(0,0,0,0.2);
  background: #ededed;
  border-radius: 5px;
}