body {
  margin: 0 auto;
  padding: 0;
  font-family: Microsoft YaHei;
  background-color: #f4f3f9;
  font-size: 100%;
}
@media all and (min-width: 640px) {
  body {
    width: 640px;
    margin: 0 auto;
  }
}
html,
h1,
h2,
h3,
h4,
h5,
dl,
dd,
dt,
ul,
li,
ol,
span,
p {
  margin: 0;
  padding: 0;
}
select {
  border: 0 none;
}
a {
  text-decoration: none;
}
input,
textarea,
select {
  outline: none;
  border: 0 none;
  padding: 0;
  margin: 0;
}
ul,
li {
  list-style: none;
}
button {
  outline: none;
}
.left {
  float: left;
}
.right {
  float: right;
}
.index {
  position: relative;
}
.banquan {
  text-align: center;
  padding: 0.8125rem 0;
  width: 100%;
  border-top: 0.15625rem solid #173786;
  background-color: #dfe8ff;
}
.banquan .txt {
  color: #000000;
  font-size: 0.625rem;
  line-height: 1.09375rem;
}
.footer {
  padding: 0.3125rem 0.625rem 0.4375rem;
  width: 100%;
  text-align: center;
  background-color: #173786;
  box-sizing: border-box;
}
.footer ul {
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  font-size: 0;
}
.footer ul li {
  width: 25%;
  margin-top: 0.125rem;
}
.footer ul li a {
  display: block;
  color: #fff;
  font-size: 0.75rem;
}
.footer ul li:nth-child(2) {
  width: 50%;
}
.footer ul li:nth-child(2) b {
  font-size: 0.8125rem;
}