web page

font-size: 38px; (the font size)
margin-bottom: 43px; (the distance below the font)
text-align:center; (the font is centered horizontally)
line-height: 90px; (the font is centered vertically)
text-indent: 2em; ( first line indent)
border:1px solid #060606 (border size, color)


line-height: 15px; (line spacing)
 (position: fixed; (positioning)
    bottom: 0px;)
{overflow: hidden;} (big box Two small boxes, one floating on the left and one floating on the right,
                            the width of the two boxes combined is not as wide
                            as the large box. Typing under the large box will appear in the blank space of the large box.
                            At this time, add overflow: hidden in the father, which is the large box;)

box-shadow: 5px 11px 11px 11px #1B1B1B; (box shadow)
z-index (property sets the stacking order of elements.
                           Elements with higher stacking order are
                           always in front of elements with lower stacking order. )

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