html - table content out of the border of table td -

I want to set border widths on TD. But I do not know why the width of the table is? Here is a demo of my problem:
I just want to run away from the blue interior Still, is it confused that even blue outside the table?
Here is the html code:

  & lt; Table range = "1" & gt; & Lt; TR & gt; & Lt; Td style = "border-left: 10px solid blue" & gt; Content & lt; / Td> & Lt; TD & gt; Content & lt; / TD & gt; & Lt; TD & gt; Content & lt; / TD & gt; & Lt; / TR & gt; & Lt; TR & gt; & Lt; TD & gt; Content & lt; / TD & gt; & Lt; TD & gt; Content & lt; / TD & gt; & Lt; TD & gt; Content & lt; / TD & gt; & Lt; / TR & gt; & Lt; TR & gt; & Lt; TD & gt; Content & lt; / TD & gt; & Lt; TD & gt; Content & lt; / TD & gt; & Lt; TD & gt; Content & lt; / TD & gt; & Lt; / TR & gt; & Lt; / Table & gt;  

Here is the CSS code:

  Table {range: 1px solid # 000; Degradation: collapse; Border-spacing: 0; } Tr {Border-Top: 1px solid # 000} tr + tr (border-top: 1px solid red;) TD (border-left: 1px solid # 000;) TD + TD {border-left: 1px solid Red;}  

for the first td in the CSS The margin is set

TD {boundary-left: 1px solid # 000;}

So when you set it again in 10px , Then

You can add a div or span to create it, it works

< Strong>

  & lt; table limit = "1" & gt; & lt; tr & gt; & lt; td & gt; Lt; span style = "border-left: 10px solid blue" & gt; & lt; span & gt; content & lt; / td> & lt; td & gt; content & lt; / td & gt; LT; TD & gt; Content & lt; / TD & gt; & lt; / TR & gt; & lt; TR & gt; & lt; TD & gt; Content & lt; / Td & gt; & lt; TD & Gt; Content & lt; / TD & gt; & lt; TD & gt; Content & lt; / TD & gt; & Lt; / TR & gt; & Lt; TR & gt; & Lt; TD & gt; Content & lt; / TD & gt; & Lt; TD & gt; Content & lt; / TD & gt; & Lt; TD & gt; Content & lt; / TD & gt; & Lt; / TR & gt; & Lt; / Table & gt;  

Or replace it directly in CSS

  TD {boundary-left: 10px solid blue; }  

Or you can just

  table {range: 1px solid # 000; Boundary: Separate; Border-spacing: 0; }  

instead of

  table {range: 1px solid # 000; Degradation: collapse; Border-spacing: 0; }