body {
  margin: 0;
  padding: 0;
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
}
body * {
  box-sizing: border-box;
}
a {
  text-decoration: none;
  /* 移除移动端点击高亮 */
  -webkit-tap-highlight-color: rgba(0, 0, 0, 0);
}

input,
button,
textarea {
  color: inherit;
  font: inherit;
  border: none;
}

a:focus,
input:focus,
button:focus,
textarea:focus {
  outline: none;
}

ol,
ul{
  list-style: none;
}

h1,
h2,
h3,
h4,
h5,
h6 
p,
ul,
ol {
  margin: 0;
  padding: 0;
}