.activity-list {
  list-style: none;
  padding: 0;
}

.activity-list li {
  padding: 10px 0;
  border-bottom: 1px solid #eee;
}

.dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  display: inline-block;
  margin-right: 8px;
}

.dot.red { background: #ff4d4f; }
.dot.blue { background: #1677ff; }
.dot.green { background: #52c41a; }

.unread {
  font-weight: 600;
}