I want to Change the font-size of H2 tags in the content. .amp-wp-content.the_content h2.

now its currently showing font size : 27px. I want to set it 18px. Also want to Reduce the font size the overall content. so add the Custom CSS code AMP options- Design- Global.

.amp-wp-content.the_content h2
{
font-size: 18px;
}
body
{
line-height:1.35em;
font-size:14px;
}

in this css code, the body font size and line-height worked. successfully changed the size, But the h2 tag not changed. font size still shows 27px. help me to fix it.

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