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The core technologies of css are: 1. Float, which allows the original elements to break away from the document flow and realize left and right arrangement; 2. Positioning, relative even if offset, the original position is still there; 3. Line height [line -height], the default font capitalization is 16px.
The operating environment of this tutorial: windows10 system, css3 version, DELL G3 computer. This method is suitable for all brands of computers.
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The core technologies of css are:
1, floating float
Let the original elements break away from the document flow and realize left and right arrangement.
Do not set the width to the minimum width (the width of the internal element)
float will be pressed on top of block-level elements, but not on top of inline elements; nor on top of text in block-level elements
Side effects of float/Three methods of clearing float
2, Position position
relative
Even if it is offset, the original position is still
offset relative to itself
absolute
Offset, the position will be gone
Offset relative to the nearest relative/absolute parent element
3, line-height
The default font capitalization is 16px;
4, the alignment of divs on the same line: baseline alignment
If there is text, the bottom of the text is the baseline
If there is an inline element, the bottom of the inline element is the baseline
If there is no text, the bottom line of the div is the baseline
Note: Set CSS style by class inheritance
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