.section-topicsbox .txtbox .ph-main {
  margin: 50px 0; }
.section-topicsbox .txtbox p {
  line-height: 2.5; }
.section-topicsbox .txtbox .sp-none {
  display: block; }
  @media screen and (max-width: 640px) {
    .section-topicsbox .txtbox .sp-none {
      display: none; } }