* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  font-family: "Palatino Linotype", "Book Antiqua", Palatino, Helvetica, STKaiti, SimSun, serif;
}

@media screen and (min-width: 375px) {
  html {
    /* iPhone6的375px尺寸作为16px基准，414px正好18px大小, 600 20px */
    font-size: calc(100% + 2 * (100vw - 375px) / 39);
    font-size: calc(16px + 2 * (100vw - 375px) / 39);
  }
}

@media screen and (min-width: 414px) {
  html {
    /* 414px-1000px每100像素宽字体增加1px(18px-22px) */
    font-size: calc(112.5% + 4 * (100vw - 414px) / 586);
    font-size: calc(18px + 4 * (100vw - 414px) / 586);
  }
}

@media screen and (min-width: 600px) {
  html {
    /* 600px-1000px每100像素宽字体增加1px(20px-24px) */
    font-size: calc(125% + 4 * (100vw - 600px) / 400);
    font-size: calc(20px + 4 * (100vw - 600px) / 400);
  }
}

@media screen and (min-width: 1000px) {
  html {
    /* 1000px往后是每100像素0.5px增加 */
    font-size: calc(137.5% + 6 * (100vw - 1000px) / 1000);
    font-size: calc(22px + 6 * (100vw - 1000px) / 1000);
  }
}

header {
  height: 2rem;
  line-height: 2rem;
  font-size: 0.9rem;
  color: #777;
  cursor: pointer;
  border-bottom: 1px rgb(231, 231, 231) solid;
  text-indent: 0.75rem;
}

main {
  margin: 5% 10% 2% 10%;
}

ul {
  border-radius: 0.24rem;
  border: rgb(211, 211, 211) solid 1px;
  border-bottom-width: 0;
  list-style: none;
  padding: 0;
  margin: 0;
}

li {
  border-bottom: rgb(211, 211, 211) solid 1px;
  height: 2.5rem;
  line-height: 2.5rem;
  font-size: 0.8rem;
}

li:hover {
  background-color: #eee;
}

a {
  text-decoration: none;
  color: rgb(66, 139, 202);
  display: block;
  text-indent: 0.83rem;
}

a:hover {
  outline: 0;
}