* {
  box-sizing: border-box;
}
.title {
  text-align: center;
}
.content {
  max-width: 900px;
  width: 90%;
  margin: 0 auto;
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
}
.box {
  width: 49%;
  height: 300px;
  background-color: #f0f0f0;
  margin-bottom: 20px;
}
.popup {
  position: fixed;
  left: 0;
  top: 0;
  width: 100%;
  height: 100%;
  z-index: 9999;
  opacity: 0;
  visibility: hidden;
  transition: .6s;
}
.popup.is-show {
  opacity: 1;
  visibility: visible;
}
.popup-inner {
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%,-50%);
  width: 80%;
  height: 90%;
  max-width: 650px;
  max-height: 500px;
  padding: 50px;
  background-color: #fff;
  z-index: 2;
}

.inner-comment{
position: relative;
width: 100%;
height: 100%;
overflow-y: scroll;
}

.close-btn {
  position: absolute;
  right: 0;
  top: 0;
  width: 50px;
  height: 50px;
  line-height: 50px;
  text-align: center;
  cursor: pointer;
}
.close-btn {
  font-size: 20px;
  color: #333;
}
.close-btn::before {
  content: "";
  position: absolute;
}
.black-background {
  position: absolute;
  left: 0;
  top: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0,0,0,.8);
  z-index: 1;
  cursor: pointer;
}