@media screen and (max-width: 560px) {
  @font-face {
    font-family: 'Consolas';
    src: url('../font/consola.ttf');
  }
}

html,
body {
  padding: 0;
  margin: 0;
  background: #ffffff;
  scroll-behavior: smooth;
  -ms-text-size-adjust: 100%;
  -webkit-text-size-adjust: 100%;
  font-family: Consolas, 'Helvetica Neue', Helvetica, Arial, 'PingFang SC', 'Hiragino Sans GB', 'Heiti SC',
    'Microsoft YaHei', 'WenQuanYi Micro Hei', sans-serif;
}
* {
  box-sizing: border-box;
  -webkit-box-sizing: border-box;
  -webkit-tap-highlight-color: transparent;
  color: #333333;
}
p,
h1,
h2,
h3,
h4,
h5,
ul,
ol,
li,
blockquote {
  list-style: none;
  padding: 0;
  margin: 0;
}
input,
select,
textarea {
  font-family: inherit;
  outline: 0;
  -moz-appearance: none;
  appearance: none;
  -webkit-appearance: none;
  border: none;
}
pre,
code {
  font-family: inherit;
}
input:-webkit-autofill {
  box-shadow: 0 0 0 1000px white inset !important;
  -webkit-box-shadow: 0 0 0 1000px white inset !important;
}
a {
  text-decoration: none;
}
::-webkit-scrollbar {
  width: 4px;
  height: 4px;
  background-color: transparent;
}
::-webkit-scrollbar-thumb {
  border-radius: 2px;
  background-color: #999999;
}
::selection {
  background-color: #4a4a4a;
  color: #f9f9f9;
}
::-moz-selection {
  background-color: #4a4a4a;
  color: #f9f9f9;
}
body::-webkit-scrollbar {
  display: none;
}
.select-none {
  -moz-user-select: none;
  -ms-user-select: none;
  user-select: none;
  -webkit-user-select: none;
}
.hover-underline {
  position: relative;
}
.hover-underline:hover:after {
  visibility: visible;
  transform: scaleX(1);
  -webkit-transform: scaleX(1);
}
.hover-underline:after {
  content: '';
  position: absolute;
  width: 100%;
  height: 1px;
  bottom: 0;
  left: 0;
  background-color: #333333;
  visibility: hidden;
  transform: scaleX(0);
  -webkit-transform: scaleX(0);
  -webkit-transition: -webkit-transform 200ms ease-in-out;
  transition: -webkit-transform 200ms ease-in-out;
  transition: transform 200ms ease-in-out;
  transition: transform 200ms ease-in-out, -webkit-transform 200ms ease-in-out;
  -webkit-transition: transform 200ms ease-in-out;
}
body {
  width: 100%;
  max-width: 680px;
  padding: 0 14px;
  margin: 0 auto;
}
.header {
  padding: 40px 0;
  display: -webkit-box;
  display: flex;
  -webkit-box-orient: horizontal;
  -webkit-box-direction: normal;
  flex-flow: row nowrap;
  -webkit-box-align: center;
  align-items: center;
}
.header .logo {
  width: 42px;
  height: 42px;
  cursor: pointer;
  border-radius: 50%;
  flex-shrink: 0;
  margin-right: 9px;
  box-shadow: 0 1px 5px rgba(0, 0, 0, 0.1);
  -webkit-transition: -webkit-transform 500ms ease-in-out;
  transition: -webkit-transform 500ms ease-in-out;
  transition: transform 500ms ease-in-out;
  transition: transform 500ms ease-in-out, -webkit-transform 500ms ease-in-out;
}
.header .logo:hover {
  -webkit-transform: rotate(360deg);
  transform: rotate(360deg);
}
.header .menu {
  -webkit-box-flex: 1;
  flex-grow: 1;
}
.header .menu a {
  font-size: 15px;
  display: inline-block;
  margin: 0 9px;
  padding: 3px 0;
  white-space: nowrap;
}
.footer {
  padding: 15px 0;
  font-size: 14px;
  line-height: 1.5;
}
.footer a {
  text-decoration: underline;
  color: #000000;
  padding: 0 4px;
  white-space: nowrap;
}
#to-top {
  position: fixed;
  z-index: 999;
  right: 16px;
  bottom: 12px;
  width: 34px;
  height: 34px;
  cursor: pointer;
  border-radius: 10%;
  background-color: #000000;
  opacity: 0.45;
  overflow: hidden;
  -webkit-transform: translateY(66px);
  transform: translateY(66px);
  -webkit-transition: -webkit-transform 200ms ease-in-out;
  transition: -webkit-transform 200ms ease-in-out;
  transition: transform 200ms ease-in-out;
  transition: transform 200ms ease-in-out, -webkit-transform 200ms ease-in-out;
}
#to-top.show {
  -webkit-transform: translateY(0);
  transform: translateY(0);
}
#to-top > span {
  display: block;
  width: 50%;
  height: 50%;
  position: absolute;
  left: 50%;
  top: 13px;
  -webkit-transform: translateX(-50%) rotate(45deg);
  transform: translateX(-50%) rotate(45deg);
}
#to-top > span:first-child {
  background-color: #ffffff;
}
#to-top > span:last-child {
  background-color: #000000;
  -webkit-transform: translate(-50%, 16%) rotate(45deg);
  transform: translate(-50%, 16%) rotate(45deg);
}
@media screen and (max-width: 560px) {
  .header {
    padding: 35px 0 20px 0;
  }
  .header .logo {
    width: 40px;
    height: 40px;
  }
  .header .menu a {
    margin: 0 4px;
    font-size: 14px;
  }
  .footer {
    font-size: 13px;
  }
}