blockquote,
body,
button,
dd,
dl,
dt,
fieldset,
form,
h1,
h2,
h3,
h4,
h5,
h6,
hr,
input,
legend,
li,
ol,
p,
pre,
td,
textarea,
th,
ul {
  margin: 0;
  padding: 0;
  list-style: none;
  box-sizing: border-box;
}

.clearfix::after {
  content: "";
  height: 0;
  visibility: hidden;
  display: block;
  clear: both;
}

em,
i {
  font-style: normal;
}

ul,
ol,
li {
  list-style: none;
}

img {
  border: 0;
  vertical-align: middle;
}

button {
  cursor: pointer;
}

a {
  text-decoration: none;
}

button,
input {
  font-family: Microsoft YaHei, Heiti SC, tahoma, arial, Hiragino Sans GB, "\5B8B\4F53", sans-serif;
  outline: none;
}

body {
  -webkit-font-smoothing: antialiased;
  background-color: #fff;
  font: Microsoft YaHei, Heiti SC, tahoma, arial, Hiragino Sans GB, "\5B8B\4F53", sans-serif;
}

.nav {
  position: fixed;
  top: 35%;
  right: 0;
  display: flex;
  flex-direction: column;
  background-color: #ffffff;
  width: 81px;
  height: 380px;
  border-top-left-radius: 10px;
  border-bottom-left-radius: 10px;
  justify-content: space-around;
  z-index: 200;
  box-shadow: -5px 7px 10px -6px #000;
}

.nav li a {
  display: flex;
  flex-direction: column;
  align-items: center;
  font-size: 14px;
  font-weight: 600;
  color: #d72226;
}