css实现三维凹凸立体键盘按钮效果代码-html代码-BFW代码库

代码语言：html

代码描述：css实现三维凹凸立体按钮效果代码，类似键盘按下凹凸效果。

下面为部分代码预览，完整代码请点击下载或在bfwstudio webide中打开

<!DOCTYPE html>
<html lang="en" >

<head>
  <meta charset="UTF-8">

<style>
@charset "UTF-8";
/* Reset box-model and set borders */
/* ============================================ */
*,
::before,
::after {
  box-sizing: border-box;
  border-style: solid;
  border-width: 0;
}

/* Document */
/* ============================================ */
/**
 * 1. Correct the line height in all browsers.
 * 2. Prevent adjustments of font size after orientation changes in iOS.
 * 3. Remove gray overlay on links for iOS.
 * 4. Render kerning consistently in all browsers.
 * 5. Correct font smoothing for macOS.
 * 6. Fix bottom navigation area issue for Safari 15+.
 */
html {
  line-height: 1.5;
  /* 1 */
  -webkit-text-size-adjust: 100%;
  /* 2 */
  -webkit-tap-highlight-color: transparent;
  /* 3 */
  font-feature-settings: "kern";
  /* 4 */
  -webkit-font-feature-settings: "kern";
  /* 5 */
  -moz-font-feature-settings: "kern";
  /* 5 */
  -webkit-font-smoothing: antialiased;
  /* 5 */
  -moz-osx-font-smoothing: grayscale;
  /* 5 */
}

/* Sections */
/* ============================================ */
/**
 * Remove the margin in all browsers.
 */
body {
  margin: 0;
}

/**
 * Render the `main` element consistently in IE.
 */
main {
  display: block;
}

/* Vertical rhythm */
/* ============================================ */
p,
table,
blockquote,
address,
pre,
iframe,
form,
figure,
dl {
  margin: 0;
}

/* Headings */
/* ============================================ */
h1,
h2,
h3,
h4,
h5,
h6 {
  font-size: inherit;
  font-weight: inherit;
  margin: 0;
}

/* Lists (enumeration) */
/* ============================================ */
ul,
ol,
menu {
  margin: 0;
  padding: 0;
  list-style: none;
}

/* Lists (definition) */
/* ============================================ */
dd {
  margin-left: 0;
}

/* Grouping content */
/* ============================================ */
/**
 * 1. Add the correct box sizing in Firefox.
 * 2. Show the overflow in Edge and IE.
 */
hr {
  box-sizing: content-box;
  /* 1 */
  height: 0;
  /* 1 */
  overflow: visible;
  /* 2 */
  border-top-width: 1px;
  margin: 0;
  clear: both;
  color: inherit;
}

/**
 * 1. Correct the inheritance and scaling of font size in all browsers.
 * 2. Correct the odd `em` font sizing in all browsers.
 * 3. Wrap lines by default instead of overflow.
 */
pre {
  font-family: inherit;
  /* 1 */
  font-size: inherit;
  /* 2 */
  white-space: pre-line;
  /* 3 */
}

address {
  font-style: inherit;
}

/* Text-level semantics */
/* ============================================ */
/**
 * Remove the gray background on active links in IE 10.
 */
a {
  background-color: transparent;
  text-decoration: none;
  color: inherit;
}

/**
 * 1. Remove the bottom border in Chrome 57-
 * 2. Add the correct text decoration in Chrome, Edge, IE, Opera, and Safari.
 */
abbr[title] {
  border-bottom: none;
  /* 1 */
  text-decoration: none;
  /* 2 */
}

/**
 * Add the correct font weight in Chrome, Edge, and Safari.
 */
b,
strong {
  font-weight: bolder;
}

/**
 * 1. Correct the inheritance and scaling of font size in all browsers.
 * 2. Correct the odd `em` font sizing in all browsers.
 */
code,
kbd,
samp {
  font-family: "Menlo", "Monaco", "Consolas", "Courier New", monospace;
  /* 1 */
  font-size: inherit;
  /* 2 */
}

/**
 * Add the correct font size in all browsers.
 */
small {
  font-size: 80%;
}

/**
 * Prevent `sub` and `sup` elements from affecting the line height in all browsers.
 */
sub,
sup {
  font-size: 75%;
  line-height: 0;
  position: relative;
  vertical-align: baseline;
}

sub {
  bottom: -0.25em;
}

sup {
  top: -0.5em;
}

/* Replaced content */
/* ============================================ */
/**
 * Prevent vertical alignment issues.
 */
svg,
img,
embed,
object,
iframe {
  vertical-align: bottom;
}

/* Forms */
/* ============================================ */
/**
 * Reset form fields to make them styleable.
 * 1. Make form elements stylable across systems iOS especially.
 * 2. Inherit text-transform from parent.
 */
button,
input,
optgroup,
select,
textarea {
  -webkit-appearance: none;
  /* 1 */
  appearance: none;
  vertical-align: middle;
  color: inherit;
  font: inherit;
  background: transparent;
  padding: 0;
  margin: 0;
  border-radius: 0;
  text-align: inherit;
  text-transform: inherit;
  /* 2 */
}

/**
 * Correct cursors for clickable elements.
 */
button,
[type=button],
[type=reset],
[type=submit] {
  cursor: pointer;
}

button:disabled,
[type=button]:disabled,
[type=reset]:disabled,
[type=submit]:disabled {
  cursor: default;
}

/**
 * Clickable labels and selects.
 */
select,
label {
  cursor: pointer;
}

/**
 * Improve outlines for Firefox and unify style with input elements & buttons.
 */
:-moz-focusring {
  outline: auto;
}

select:disabled {
  opacity: inherit;
}

/**
 * 1. Remove padding.
 */
option {
  padding: 0;
  /* 1 */
}

/**
 * Reset to invisible
 */
fieldset {
  margin: 0;
  padding: 0;
  min-width: 0;
}

legend {
  padding: 0;
}

/**
 * Add the correct vertical alignment in Chrome, Firefox, and Opera.
 */
progress {
  vertical-align: baseline;
}

/**
 * Remove the default vertical scrollbar in IE 10+.
 */
textarea {
  overflow: auto;
}

/**
 * Correct .........完整代码请登录后点击上方下载按钮下载查看