.three_a .wrap {
  position: relative;
  padding: 75% 0 0;
  overflow: hidden;
  cursor: grab;
}
.three_a .canvas {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
}

.page45 .op-icon {
  width: 1.75em;
  height: 1.75em;
  line-height: 1.75;
  color: #fff;
  font-weight: bold;
  text-align: center;
  background: #947343;
  border-radius: 3px;
  cursor: pointer;
}
.page45 .op-zoom {
  position: absolute;
  right: 10px;
  bottom: 10px;
  display: flex;
  gap: 0 5px;
}
.page45 .op-left {
  position: absolute;
  top: 0;
  bottom: 0;
  left: 10px;
  margin: auto;
}
.page45 .op-right {
  position: absolute;
  top: 0;
  right: 10px;
  bottom: 0;
  margin: auto;
}
.page45 .op-up {
  position: absolute;
  top: 10px;
  right: 0;
  left: 0;
  margin: auto;
}
.page45 .op-down {
  position: absolute;
  right: 0;
  bottom: 10px;
  left: 0;
  margin: auto;
}
.page45 .op-houi {
  position: absolute;
  top: 10px;
  right: 10px;
  width: 2em;
}
.page45 .nav-wrap {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 1em 1em;
  margin: 20px 0 0;
}
.page45 .nav {
  width: 8em;
  color: #fff;
  font-weight: bold;
  text-align: center;
  background-color: #947343;
  border-radius: 5px;
  cursor: pointer;
}
.page45 .desc-table {
  width: 100%;
}
.page45 .desc-table-th,
.page45 .desc-table-td {
  border-style: solid;
  border-color: #ccc;
  border-width: 0 0 1px;
}
.page45 .desc-table-th {
  padding: 0 0.5em 0.5em;
}
.page45 .desc-table-td {
  padding: 0.5em 0.5em;
}