* {
  box-sizing: border-box;
}
body {
  margin: 0;
}
header {
  background-color: cyan;
  color: white;
  height: 2.8rem;
  line-height: 2.8rem;
  text-align: center;
}
form {
  margin: 0.5rem;
}
input[type=text] {
  border: 1px solid cyan;
  height: 2.4rem;
  padding: 0.7rem;
  width: 100%;
  border-radius: 0.3rem;
  margin: 0.25rem 0;
}
input[type=text]:focus {
  box-shadow: inset 1px 1px 2px gray;
}
button {
  border: 1px solid #00e5e6;
  background-color: #00e5e6;
  color: white;
  height: 2.4rem;
  padding: 0.4rem;
  width: 100%;
  border-radius: 0.3rem;
  margin: 0.25rem 0;
  font-size: 0.9rem;
}
section {
  margin: 0.5rem 0.5rem 3rem 0.5rem;
  display: none;
}
dl {
  margin: 1rem 0;
  font-size: 0.8rem;
  color: #333;
}
dt {
  float: left;
}
dd {
  float: right;
}
section > div {
  clear: both;
}
.zhichu {
  color: red;
}
.zhichu > dd:before {
  content: '-';
}
.hr {
  border-bottom: 1px solid gray;
  position: relative;
  top: 0.5rem;
}
.result {
  font-weight: bold;
}