I'm having the same issue. Please help me get passed this. I removed the heading
#10 Oops, try again. It looks like your second <li>'s font-size is 16px instead of 12px
style is an attribute, the values in the style attribute should be between two quotation marks, if you have multiply properties + values separate them with a semi-colon:
style="property1: value1; property2: value2"
see? no additional quotation marks
Thank you so much for the explanation! Problem solved!