h1 {
  color: #009900;
  border-bottom: dashed 2px #999900;
}
h2 {
  color: #006600;
  border-bottom: dashed 2px #666600;
}
ul, ol {
  color: #009900; 
  border: double 5px #006600;/*二重線 太さ 色*/
  background: #aaffaa; 
  padding: 0.5em 0.5em 0.5em 2em;
}

ul li, ol li {
  line-height: 1.5;
  padding: 0.5em 0;
}

body{
  background: #ddd;
  padding: 4rem;
}
summary {
  padding: .8rem 1.5rem;
  outline: 0;
  cursor: pointer;
  display: block;
  color: #c30d23;
  font-weight: 700;
  font-size: 16.5px;
  &:hover {
    background: #eee;
    transition: all linear 0.2s;
  }
  list-style: none;
  &::-webkit-details-marker {
    display: none;
  }
}

details {
  background: #fafafa;
  border: 1px solid #eee;
  border-radius: 4px;
  margin-bottom: 15px;
  font-size: 10px;
  display: block;
}

details summary::before {
  content: none !important;
}
details summary::after {
  content: "＋";
  color: #aaa;
  font-weight: 400;
  float: right;
  width: 1rem;
  text-align:center;
}
detail

.box2 {
    padding: 0.5em 1em;
    margin: 2em 0;
    font-weight: bold;
    color: #6091d3;/*文字色*/
    background: #FFF;
    border: solid 3px #6091d3;/*線*/
    border-radius: 10px;/*角の丸み*/
}
.box2 p {
    margin: 0; 
    padding: 0;
}