Question

我试图获得这种布局。

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这是我的代码。我似乎不能让z-index工作，这样我就可以在背景上加上黑色边框。

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.btn {
    border-radius: 0px!important;
    font-family: $font-roboto!important;
    font-size: 1.125rem!important;
    text-shadow: none!important;
    box-shadow: none!important;
    &.fountain-blue {
        background-color: $color-fountain-blue;
        color: #fff;
        margin-left:5px;
        margin-top: 5px;
        margin-right: -10px;  
    }
}
.btn-border {
    border: 2px solid #000;
    display: inline-block;
    height: 40px;
    z-index: 9999!important;
}

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<div class="btn-border mt-4">
                    <a href="" class="btn fountain-blue">learn more about us</a>
                </div>

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Answer 1

你应该这样做，而不是你自己的颜色和尺寸。

.btn {
  display: inline-block;
  border: 1px solid black;
  position: relative;
  padding: 10px 20px;
  margin: 20px;
  color: #fff;
}

.btn:before {
  background-color: blue;
  border-color: green;
  border-style: solid;
  border-width: 10px 5px 5px 10px;
  z-index: -1;
  position: absolute;
  height: 100%;
  width: 100%;
  top: -5px;
  left: -5px;
  content: "";
}

<a class="btn">Read more</a>

Answer 2

有很多方法可以做到这一点，但简单的方法是使用pseudo-elements。看看片段。

<强> CODEPEN (SASS version)

@import url("https://fonts.googleapis.com/css?family=Roboto");
.btn {
  border-radius: 0px;
  font-size: 1.125rem;
  text-shadow: none;
  box-shadow: none;
  display: block;
  width: calc(100% - 25px);
  text-decoration: none;
  font-family: 'Roboto', sans-serif;
  text-align: center;
}
.btn.fountain-blue {
  background-color: #65becf;
  color: #fff;
  margin-left: 5px;
  margin-top: 5px;
  padding-top: 10px;
  padding-bottom: 15px;
  padding-left: 15px;
  padding-right: 15px;
  position: relative;
}

.btn-border {
  display: inline-block;
  height: 40px;
  z-index: 9999;
  position: absolute;
  left: 50%;
  top: 50%;
  -webkit-transform: translate(-50%, -50%);
  transform: translate(-50%, -50%);
}
.btn-border:after {
  content: '';
  border: 2px solid #000;
  position: absolute;
  width: 100%;
  height: 100%;
  left: 0;
  top: 0;
}

<div class="btn-border mt-4">
  <a href="" class="btn fountain-blue">READ MORE</a>
</div>

Answer 3

作为一种可能的解决方案。

* {
  box-sizing: border-box;
}

body {
  margin: 2em;
}

.btn {
  background-color: darkblue;
  color: white;
  border: .2em solid white;
  height: 2.5em;
  width: 7em;
  position: relative;
  cursor: pointer;
}

.btn:before {
  content: " ";
  width: 9em;
  height: 4em;
  background-color: lightblue;
  position: absolute;
  top: -1em;
  left: -1em;
  z-index: -1;
}

.btn:after {
  content: " ";
  position: absolute;
  background-color: transparent;
  border: thin solid black;
  height: 2em;
  width: 6.5em;
  top: -.5em;
  left: -.5em;
}

<button class="btn">Click me</button>

如何获得此按钮布局？

3 个答案: