/* 遊び方 */
.system-content {
  max-width: 90%;
  margin: 0 auto;
}
.system-content-inner {
  margin-bottom: 70px;
}
.system-explanation {
  background-color: #fff;
  padding: 20px 15px 40px;
  box-shadow: 0px 0px 5px #ecc7a2;
}
.system-explanation-inner {
  margin-bottom: 25px;
}
.system-explanation-inner:last-child {
  margin-bottom: 0;
}
.system-img-list {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 20px;
}
.system-img-list li {
  width: calc((100% - 20px) / 3);
}

@media screen and (min-width: 768px) {
  .system-content {
    max-width: 1060px;
  }
  .system-content-inner {
    margin-bottom: 70px;
  }
  .system-explanation {
    padding: 45px 15px 60px;
  }
  .system-explanation-inner {
    max-width: 840px;
    margin: 0 auto 60px;
  }
  .system-img-list {
    gap: 62px;
    margin-bottom: 40px;
  }
  .system-img-list li {
    width: calc((100% - 124px) / 3);
  }
}