.row-center {
  display: flex;
  flex-direction: row;
  justify-content: center;
  align-items: center;
}

.row-left {
  display: flex;
  flex-direction: row;
  justify-content: flex-start;
  align-items: center;
}

.row-center-left {
  display: flex;
  flex-direction: row;
  justify-content: center;
  align-items: flex-start;
}

/* 所有页面顶部的标题 */
.h-btitle {
  color: var(--text-color-black);
  font-size: 42px;
  line-height: 60px;
}

.h-stitle {
  line-height: 30px;
  font-size: 20px;
  color: var(--text-color-gray);
}

/* 顶部除外，主体标题样式 */
.btitle {
  font-size: 36px;
  line-height: 50px;
  color: var(--text-color-black);
  text-align: center;
}

.stitle {
  text-align: center;
  font-size: 16px;
  color: var(--text-color-gray);
  line-height: 24px;
  margin-top: 20px;
  margin-bottom: 70px;
}