css - 使用具有 20px 边框半径的背景图像时，表单按钮上的模糊轮廓

Question

出于某种原因，仅在 Windows 机器上，在此页面的登录按钮上，我得到了这个难以解释的奇怪的模糊轮廓，所以你自己看看:

http://zis.smartlyedu.com/login

它不会出现在 Mac OS 上，但会出现在 Windows 上。

有人遇到过这个吗？

这是按钮的 CSS:

    div.input-submit input{
    outline:none;
    font-family:Helvetica, Arial, sans-serif;
    width:100px;
    height:35px;
    color:#fff;
    font-weight:normal;
    float:right;
    font-size:18px;
    text-shadow:#000 1px 1px 1px;
    border:1px solid #fff;
    -moz-border-radius:20px;
    -webkit-border-radius:20px;
    -o-border-radius:20px;
    -ms-border-radius:20px;
    -khtml-border-radius:20px;
    border-radius:20px;
    background:-webkit-gradient(linear, 50% 0%, 50% 100%, color-stop(0%, rgba(0,0,0,0)), color-stop(100%, rgba(0,0,0,0.2)));
    background:-webkit-linear-gradient(rgba(0,0,0,0), rgba(0,0,0,0.2));
    background:-moz-linear-gradient(rgba(0,0,0,0), rgba(0,0,0,0.2));
    background:-o-linear-gradient(rgba(0,0,0,0), rgba(0,0,0,0.2));
    background:-ms-linear-gradient(rgba(0,0,0,0), rgba(0,0,0,0.2));
    background:linear-gradient(rgba(0,0,0,0),rgba(0,0,0,0.2));
    background-color:#31639d;
    font-weight:bold;
    border:1px solid #fff
    }

Answer 1

这个解决方案是通过原始帖子的评论找到的。

Alain，将 display:none 添加到 input 元素以确认轮廓源自 input 元素。如果您确定来源的原因，请禁用与您的元素匹配的选择器的所有 CSS 属性，然后将它们单独添加回来。这样，您将能够找到 CSS 问题的原因。

Jason McCreary 回复:

Thanks, I tried your method and I found out that the issue was with the 1px border and the 20px border-radius. Apparently on Windows it freaks out if they're used at the same time on a submit button. To fix it, all I did was remove the borders and replace it with border: none;. If I removed the border-radius it would work fine, too. Thanks for the help!