hover: Use the time to unify all the attention, and then define the current
Element identification inline block attributes Enter a space, so it is best not inline element wraps to write.
Inline flow without departing from standards, to support text-align
margin: 0 auto; standard stream only inside the block elements to do so;
After the float element does not support text align
Indefinite wide navigation horizontal center:
ul{text-align:center}
li{display: inline-block}
What is the baseline: English alphabet third line
Solution picture display block gap and then the parent box set fontsize 0, vertical-align: top middle bottom
captive relative position relative positioning mark, stations, their relative positioning; top face of the top bottom listen; listen left of left face right
position absolute positioning relative to the block containing the note "father of the child must phase", do not write the coordinates left in situ
fixed positioning relative to the window
z-index only element of a positioning function, if the parent box commencement z-index, the sub-box failure z-index
transparency opacity 0 ~ 1, if the parent-child cassette with transparency, the transparency is multiplied by both the sub-box