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<!DOCTYPE html> <html> <head> <style> p.ex1 { border: 1px solid black; outline-style: solid; outline-color: red; outline-width: thin; } p.ex2 { border: 1px solid black; outline-style: solid; outline-color: red; outline-width: medium; } p.ex3 { border: 1px solid black; outline-style: solid; outline-color: red; outline-width: thick; } p.ex4 { border: 1px solid black; outline-style: solid; outline-color: red; outline-width: 4px; } </style> </head> <body> <h2>outline-width 属性</h2> <p class="ex1">细轮廓。</p> <p class="ex2">中等轮廓。</p> <p class="ex3">粗轮廓。</p> <p class="ex4">4px 粗轮廓。</p> </body> </html>