List groups are a flexible and powerful component for displaying a series of content. Modify and extend them to support just about any content within. ... <看更多>

Firstly, you have a typo. border-0 needs a period in front of it to specify it as a class selector instead of an element selector like this: ... <看更多>

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No need to set list-style: none; since .list-group-item is block level. padding-left: 0; // reset padding because ul and ol. margin-bottom: 20px;. ... <看更多>