html,body {
  background-color: white;
}
.ad_detail_box {
  margin: 0 auto;
  width: 1100px;
}
.page {
  margin-bottom: 60px;
}
.page:first-child {
  padding-top: 60px;
}
.page:last-child {
  padding-bottom: 60px;
}
img {
  width: 1100px;
  margin-bottom: 20px;
  margin-top: 20px;
  display: block;
}

p {
  font-size: 18px;
  margin-bottom: 10px;
  line-height: 30px;
  display: block;
}

h1 {
  font-size: 26px;
  font-weight: 700;
  margin-bottom: 20px;
}
p>span {
  font-weight: 700;
}