Blockquote font is light

Here is the style I use:

<style>
.card * {
  font-family: "Source Code Pro" !important;
  /*font-size: 18px !important;*/
}

blockquote {
  /*background: #F0F8FF;*/
  border-style: dotted;
  border-width: 2px;
  border-color: #5D8AA8;
  padding: 25px;
}

.card.card-active {
  border: 3px solid #8cc63f
}

</style>

and I get:

z-g

Why the blockquote font is “light”?