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WJCorrection status：qualified
Teacher's comments：写的不错，继续加油。
Collection
Collection
<!DOCTYPE html><html lang="en"><head><meta charset="UTF-8"><meta name="viewport" content="width=device-width, initial-scale=1.0"><title>元素属性的样式规则</title></head><style>#title-id{color:violet;font-size:20px;}.title-Class{color:darkgreen;font-size:18px;}#title-h{font-weight: bold;}.title-h{color: darkgoldenrod;padding-left: 15px;}</style><body><p id="title-id">ID元素的样式,字体颜色violet,字体大小：20像素</p><p class="title-Class">Class元素的样式,字体颜色darkgreen,字体大小：18像素</p><p style="color: darkred; font-size: 16px;">Style元素的样式,字体颜色darkred,字体大小：16像素</p><p id="title-h" class="title-h" style="background-color: black; height:50px; line-height:50px;">三个元素样式混搭，ID元素：粗体字，Class元素：颜色：darkgoldenrod，填充15个像素，Style元素：背景黑色,行高50像素,文本垂直居中</p></body></html>