.activity-articles article {
  padding-bottom: 10px;
  border-bottom: 1px solid #a0a8b3;
  border-top: 1px solid #a0a8b3;
}
.activity-articles article:not(:last-child) {
  margin-bottom: min(7vw, 40px);
}
.activity-articles article > * {
  padding-left: 10px;
  padding-right: 10px;
}
.activity-articles article > *:not(:last-child) {
  margin-bottom: 10px;
}
.activity-articles header {
  background: #eeeff1;
  padding-top: 0.4em;
  padding-bottom: 0.4em;
  line-height: 1.4;
}
.activity-articles .date {
  font-size: 0.875em;
}
.activity-articles h3 {
  font-weight: 700;
}
.activity-articles .related dt {
  font-size: 0.875em;
  line-height: 1.4;
}
.activity-articles .related dd {
  line-height: 1.2;
}

.popup-box {
  font-size: 0.875em;
}
.popup-box h3, .popup-box h4, .popup-box h5 {
  line-height: 1.4;
}
.popup-box h3:not(:first-child), .popup-box h4:not(:first-child), .popup-box h5:not(:first-child) {
  margin-top: 1.5em;
}
.popup-box h3 {
  font-size: 1.125em;
  font-weight: bold;
}
.popup-box h4 {
  font-size: 1em;
  font-weight: bold;
}
.popup-box h5 {
  font-size: 1em;
}
.popup-box p:not(:last-child) {
  margin-bottom: 1em;
}