html代码
<div class="buttons"><button class="fill">填写</button><button class="pulse">脉冲</button><button class="close">关闭</button><button class="raise">升高</button><button class="up">填充</button><button class="slide">幻灯片</button><button class="offset">偏移</button></div>
css样式
.fill:hover,.fill:focus {box-shadow: inset 0 0 0 2em var(--hover);}.pulse:hover,.pulse:focus {-webkit-animation: pulse 1s;animation: pulse 1s;box-shadow: 0 0 0 2em rgba(255, 255, 255, 0);}@-webkit-keyframes pulse {0% {box-shadow: 0 0 0 0 var(--hover);}}@keyframes pulse {0% {box-shadow: 0 0 0 0 var(--hover);}}.close:hover,.close:focus {box-shadow: inset -3.5em 0 0 0 var(--hover), inset 3.5em 0 0 0 var(--hover);}.raise:hover,.raise:focus {box-shadow: 0 0.5em 0.5em -0.4em var(--hover);-webkit-transform: translateY(-0.25em);transform: translateY(-0.25em);}.up:hover,.up:focus {box-shadow: inset 0 -3.25em 0 0 var(--hover);}.slide:hover,.slide:focus {box-shadow: inset 6.5em 0 0 0 var(--hover);}.offset {box-shadow: 0.3em 0.3em 0 0 var(--color), inset 0.3em 0.3em 0 0 var(--color);}.offset:hover,.offset:focus {box-shadow: 0 0 0 0 var(--hover), inset 6em 3.5em 0 0 var(--hover);}.fill {--color: #a972cb;--hover: #cb72aa;}.pulse {--color: #ef6eae;--hover: #ef8f6e;}.close {--color: #ff7f82;--hover: #ffdc7f;}.raise {--color: #ffa260;--hover: #e5ff60;}.up {--color: #e4cb58;--hover: #94e458;}.slide {--color: #8fc866;--hover: #66c887;}.offset {--color: #19bc8b;--hover: #1973bc;}button {color: var(--color);-webkit-transition: 0.25s;transition: 0.25s;}button:hover,button:focus {border-color: var(--hover);color: #fff;}body {color: #fff;background: #17181c;font: 300 1em 'Fira Sans', sans-serif;-webkit-box-pack: center;-ms-flex-pack: center;justify-content: center;-ms-flex-line-pack: center;align-content: center;-webkit-box-align: center;-ms-flex-align: center;align-items: center;text-align: center;min-height: 100vh;display: -webkit-box;display: -ms-flexbox;display: flex;}button {background: none;border: 2px solid;font: inherit;line-height: 1;margin: 0.5em;padding: 1em 2em;}h1 {font-weight: 400;}code {color: #e4cb58;font: inherit;}
