.index-section__h1 {text-align: center;}
.pop-cats { padding: 18px 0 8px; }
.pop-cats__title {
  font-size: 18px;
  font-weight: 800;
  margin-bottom: 12px;
}
.pop-cats__group { margin-bottom: 4px; border: 1px solid #eee; border-radius: 10px; overflow: hidden; }
.pop-cats__group + .pop-cats__group { margin-top: 10px; }
.pop-cats__group-title {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  box-sizing: border-box;
  padding: 12px;
  background: #ff851f;
  color: #fff;
  border: none;
  font-size: 15px;
  font-weight: 800;
  cursor: pointer;
  text-align: left;
  list-style: none; /* убираем стандартный маркер summary */
}
.pop-cats__group-title::-webkit-details-marker { display: none; } /* для Safari/Chrome */
.pop-cats__group-title::after {
  content: "";
  width: 9px; height: 9px;
  border-right: 2px solid #fff;
  border-bottom: 2px solid #fff;
  transform: rotate(45deg);
  transition: transform .2s;
}
.pop-cats__group[open] .pop-cats__group-title::after { transform: rotate(225deg) translate(-2px,-2px); }
.pop-cats__list a {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 12px;
  font-size: 14px;
  color: #222;
  text-decoration: none;
  border-bottom: 1px solid #f2f2f2;
}
.pop-cats__list a:last-child { border-bottom: none; }
.pop-cats__list a::after {
  content: "›";
  color: #f07d00;
  font-size: 20px;
  font-weight: 700;
  line-height: 1;
  margin-left: 4px;
}
.pop-cats__list a:active { background: #fff8dd; }
.pop-cats__group-title a {
  color: #fff;
}
.pop-cats__sub-title {
  margin: 0;
  font-size: 14px;
  line-height: 1.3;
  padding: 14px 6px 6px;
}