No proper margin-top for headlines in ticket descr...
The CSS Margin Properties | Beamtic
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CSS margin-top Property - server2client.com
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10 Margin in CSS | Margin Collapse | CSS Tutorial - YouTube
Lesson 2.7. Margin and padding | Lulu's blog
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CSS： marginの正しい理解 - kojika17
CSS margin(外边距) | 菜鸟教程
