/**
 该样式表内容是为了保证各个浏览器显示效果的统一性
 
 * * 1.更改默认字体家族在所有浏览器
 * * 2.调整字体大小和时间后的变化（在IE和iOS)
 */

html {
  font-family: sans-serif; /* 1 */
  -ms-text-size-adjust: 100%; /* 2 */
  -webkit-text-size-adjust: 100%; /* 2 */
}

/**
 * 清除所有浏览器的边缘
 */

body {
  margin: 0;
}

/* HTML5 显示定义
   =============== */

article,
aside,
details, /* 1 */
figcaption,
figure,
footer,
header,
main, /* 2 */
menu,
nav,
section,
summary { /* 1 */
  display: block;
}

audio,
canvas,
progress,
video {
  display: inline-block;
}

audio:not([controls]) {
  display: none;
  height: 0;
}

progress {
  vertical-align: baseline;
}

template, /* 1 */
[hidden] {
  display: none;
}

/* Links
   ====================== */

a {
  background-color: transparent; /* 1 */
  -webkit-text-decoration-skip: objects; /* 2 */
}

a:active,
a:hover {
  outline-width: 0;
}

/* Text-level semantics
   ==================== */


abbr[title] {
  border-bottom: none; /* 1 */
  text-decoration: underline; /* 2 */
  text-decoration: underline dotted; /* 2 */
}

b,strong {
  font-weight: inherit;
}

b,
strong {
  font-weight: bolder;
}

dfn {
  font-style: italic;
}

h1 {
  font-size: 2em;
  margin: 0.67em 0;
}

mark {
  background-color: #ff0;
  color: #000;
}

small {
  font-size: 80%;
}

sub,
sup {
  font-size: 75%;
  line-height: 0;
  position: relative;
  vertical-align: baseline;
}

sub {
  bottom: -0.25em;
}

sup {
  top: -0.5em;
}

/* Embedded content
   ========================================================================== */

img {
  border-style: none;
}

svg:not(:root) {
  overflow: hidden;
}

/* Grouping content
   ========================================================================== */

code,
kbd,
pre,
samp {
  font-family: monospace, monospace; /* 1 */
  font-size: 1em; /* 2 */
}

figure {
  margin: 1em 40px;
}

hr {
  box-sizing: content-box; /* 1 */
  height: 0; /* 1 */
  overflow: visible; /* 2 */
}

/* Forms
   ==================== */

button,
input,
select,
textarea {
  font: inherit; /* 1 */
  margin: 0; /* 2 */
}

optgroup {
  font-weight: bold;
}

button,
input { /* 1 */
  overflow: visible;
}

button,
select { /* 1 */
  text-transform: none;
}

button,
html [type="button"], /* 1 */
[type="reset"],
[type="submit"] {
  -webkit-appearance: button; /* 2 */
}

button::-moz-focus-inner,
[type="button"]::-moz-focus-inner,
[type="reset"]::-moz-focus-inner,
[type="submit"]::-moz-focus-inner {
  border-style: none;
  padding: 0;
}

button:-moz-focusring,
[type="button"]:-moz-focusring,
[type="reset"]:-moz-focusring,
[type="submit"]:-moz-focusring {
  outline: 1px dotted ButtonText;
}

fieldset {
  border: 1px solid #c0c0c0;
  margin: 0 2px;
  padding: 0.35em 0.625em 0.75em;
}

legend {
  box-sizing: border-box; /* 1 */
  color: inherit; /* 2 */
  display: table; /* 1 */
  max-width: 100%; /* 1 */
  padding: 0; /* 3 */
  white-space: normal; /* 1 */
}

textarea {
  overflow: auto;
}

[type="checkbox"],
[type="radio"] {
  box-sizing: border-box; /* 1 */
  padding: 0; /* 2 */
}

[type="number"]::-webkit-inner-spin-button,
[type="number"]::-webkit-outer-spin-button {
  height: auto;
}

[type="search"] {
  -webkit-appearance: textfield; /* 1 */
  outline-offset: -2px; /* 2 */
}

[type="search"]::-webkit-search-cancel-button,
[type="search"]::-webkit-search-decoration {
  -webkit-appearance: none;
}

::-webkit-input-placeholder {
  color: inherit;
  opacity: 0.54;
}

::-webkit-file-upload-button {
  -webkit-appearance: button; /* 1 */
  font: inherit; /* 2 */
}