<a style="border:1px solid red;margin:0;padding:0;" id="nana" href="#"><img src="/static/imghwm/default1.png" data-src="Images/%e5%a8%9c%e5%a8%9c.jpg" class="lazy" / alt="为什么在a标签中添加一张图片，图片下方和a标签的边界会有一些空隙？_html/css_WEB-ITnose" ></a>
如上的代码，图片最下方并不是紧贴着a标签下边界的，会有一条缝隙，这是为什么呢？
a标签和img标签都是内联元素，我试了下，如果把a标签和img标签都设置成block，两个元素就会完全重合，如果只给a标签设置block，img图片下方和a标签下边界同样还是会有一条缝隙，还是搞不懂为什么，求大神解答！
回复讨论(解决方案)
可能没有完整的reset导致的。
<!doctype html><html><head> <meta charset="UTF-8"> <title></title> <style type="text/css"> *{ margin:0; padding:0;} body{font:12px/1.125 Arial,Helvetica,sans-serif;background:#fff;} table{border-collapse:collapse;border-spacing:0;} li{list-style:none;} fieldset,img{border:0;} article,aside,details,figcaption,figure,footer,header,hgroup,menu,nav,section{display:block} q:before,q:after{content:'';} a:focus,input,textarea{outline-style:none;} input[type="text"],input[type="password"],textarea{outline-style:none;-webkit-appearance:none;} textarea{resize:none} address,caption,cite,code,dfn,em,i,th,var{font-style:normal;font-weight:normal;} legend{color:#000;} abbr,acronym{border:0;font-variant:normal;} a{color:#0a8cd2;text-decoration:none;} a:hover{text-decoration:underline;} .clearfix:after{content:".";display:block;height:0;clear:both;visibility:hidden;} .clearfix{display:inline-block;} .clearfix{display:block;} .clear{clear:both;height:0;font:0/0 Arial;visibility:hidden;} .none{display:none} </style></head><body><a style="border:1px solid red;margin:0;padding:0;" id="nana" href="#"><img src="/static/imghwm/default1.png" data-src="Images/%e5%a8%9c%e5%a8%9c.jpg" class="lazy" / alt="为什么在a标签中添加一张图片，图片下方和a标签的边界会有一些空隙？_html/css_WEB-ITnose" ></a></body></html>
可能没有完整的reset导致的。
<!doctype html><html><head> <meta charset="UTF-8"> <title></title> <style type="text/css"> *{ margin:0; padding:0;} body{font:12px/1.125 Arial,Helvetica,sans-serif;background:#fff;} table{border-collapse:collapse;border-spacing:0;} li{list-style:none;} fieldset,img{border:0;} article,aside,details,figcaption,figure,footer,header,hgroup,menu,nav,section{display:block} q:before,q:after{content:'';} a:focus,input,textarea{outline-style:none;} input[type="text"],input[type="password"],textarea{outline-style:none;-webkit-appearance:none;} textarea{resize:none} address,caption,cite,code,dfn,em,i,th,var{font-style:normal;font-weight:normal;} legend{color:#000;} abbr,acronym{border:0;font-variant:normal;} a{color:#0a8cd2;text-decoration:none;} a:hover{text-decoration:underline;} .clearfix:after{content:".";display:block;height:0;clear:both;visibility:hidden;} .clearfix{display:inline-block;} .clearfix{display:block;} .clear{clear:both;height:0;font:0/0 Arial;visibility:hidden;} .none{display:none} </style></head><body><a style="border:1px solid red;margin:0;padding:0;" id="nana" href="#"><img src="/static/imghwm/default1.png" data-src="Images/%e5%a8%9c%e5%a8%9c.jpg" class="lazy" / alt="为什么在a标签中添加一张图片，图片下方和a标签的边界会有一些空隙？_html/css_WEB-ITnose" ></a></body></html> 还是一样额，还是有空隙的
我少写了个：img{vertical-align:middle;}
拷贝到本地运行看看。
<!doctype html><html><head> <meta charset="UTF-8"> <title></title> <style type="text/css"> *{ margin:0; padding:0;} body{font:12px/1.125 Arial,Helvetica,sans-serif;background:#fff;} table{border-collapse:collapse;border-spacing:0;} li{list-style:none;} fieldset,img{border:0;} article,aside,details,figcaption,figure,footer,header,hgroup,menu,nav,section{display:block} q:before,q:after{content:'';} a:focus,input,textarea{outline-style:none;} input[type="text"],input[type="password"],textarea{outline-style:none;-webkit-appearance:none;} textarea{resize:none} address,caption,cite,code,dfn,em,i,th,var{font-style:normal;font-weight:normal;} legend{color:#000;} abbr,acronym{border:0;font-variant:normal;} a{color:#0a8cd2;text-decoration:none;} a:hover{text-decoration:underline;} .clearfix:after{content:".";display:block;height:0;clear:both;visibility:hidden;} .clearfix{display:inline-block;} .clearfix{display:block;} .clear{clear:both;height:0;font:0/0 Arial;visibility:hidden;} .none{display:none} img{vertical-align:middle;} .link{ display:inline-block; *display:inline; *zoom:1;} </style></head><body><a class="link" style="max-width:90%" id="nana" href="#"><img src="/static/imghwm/default1.png" data-src="http://dummyimage.com/600x400/" class="lazy" / alt="为什么在a标签中添加一张图片，图片下方和a标签的边界会有一些空隙？_html/css_WEB-ITnose" ></a></body></html>
可能没有完整的reset导致的。
<!doctype html><html><head> <meta charset="UTF-8"> <title></title> <style type="text/css"> *{ margin:0; padding:0;} body{font:12px/1.125 Arial,Helvetica,sans-serif;background:#fff;} table{border-collapse:collapse;border-spacing:0;} li{list-style:none;} fieldset,img{border:0;} article,aside,details,figcaption,figure,footer,header,hgroup,menu,nav,section{display:block} q:before,q:after{content:'';} a:focus,input,textarea{outline-style:none;} input[type="text"],input[type="password"],textarea{outline-style:none;-webkit-appearance:none;} textarea{resize:none} address,caption,cite,code,dfn,em,i,th,var{font-style:normal;font-weight:normal;} legend{color:#000;} abbr,acronym{border:0;font-variant:normal;} a{color:#0a8cd2;text-decoration:none;} a:hover{text-decoration:underline;} .clearfix:after{content:".";display:block;height:0;clear:both;visibility:hidden;} .clearfix{display:inline-block;} .clearfix{display:block;} .clear{clear:both;height:0;font:0/0 Arial;visibility:hidden;} .none{display:none} </style></head><body><a style="border:1px solid red;margin:0;padding:0;" id="nana" href="#"><img src="/static/imghwm/default1.png" data-src="Images/%e5%a8%9c%e5%a8%9c.jpg" class="lazy" / alt="为什么在a标签中添加一张图片，图片下方和a标签的边界会有一些空隙？_html/css_WEB-ITnose" ></a></body></html> 完全??
<a style="max-width:90%" id="nana" href="#"><img src="/static/imghwm/default1.png" data-src="Images/%e5%a8%9c%e5%a8%9c.jpg" class="lazy" / alt="为什么在a标签中添加一张图片，图片下方和a标签的边界会有一些空隙？_html/css_WEB-ITnose" ></a>
如上的代码，图片最下方并不是紧贴着a标签下边界的，会有一条缝隙，这是为什么呢？
a标签和img标签都是内联元素，我试了下，如果把a标签和img标签都设置成block，两个元素就会完全重合，如果只给a标签设置block，img图片下方和a标签下边界同样还是会有一条缝隙，还是搞不懂为什么，求大神解答！
?空隙是?很?典的??，
原因其?非常的基本，
因??初?立??的不是?洲而是?洲，
inline 元素?了正?的?示英文字母像是 y j g ?有尾巴的
?在底下留空，?要依? font-size 去?定
?主如果a??任何文字，font-size可以?定? 0
?充：
?然??片的vertical-align 指定?非baseline也能解???
但?人是不建?，依???，?IE版在文字垂直置中有著「不一?的解?」
竟然是因为英文字母的尾巴，，，多谢楼上两位大神~
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