* {
  margin: 0;
  padding: 0;
}

body {
  overflow-x: hidden;
}

main {
  font-family: Arial, sans-serif;
  padding: 2rem;
  line-height: 1.8;
  max-width: 800px;
  margin: auto;
}

h1 {
  text-align: center;
  font-size: 36px;
  margin-bottom: 3rem;
  color: #333;
}

h2 {
  color: #333;
  margin-top: 2rem;
}

p {
  margin-bottom: 1em;
}

#page_footer {
  position: sticky;
  bottom: 0;
  
  width: 100vw;
  
  background-color: #fff;
  
  color: #666;
  
  min-height: 36px;
  text-align: center;
  
  z-index: 1000;
  
  box-shadow: 0 -2px 5px rgba(0, 0, 0, 0.1);
  
  font-size: 13px;
  display: flex;
  align-items: center;
  justify-content: center;
}

#page_footer a {
  text-decoration: none;
  margin: 0 5px;
  color: #666;
}

.title {
  width: 100%;
  display: flex;
  justify-content: space-between;
  align-items: center;
  min-height: 38px;
  font-size: 16px;
  color: #fff;
   box-shadow: 0 2px 3px rgba(0, 0, 0, 0.05);
}

.title a {
  color: #fff;
  text-decoration: none;
  padding: 0 8px;
  padding: 4px;
  font-size: 14px;
  display: flex;
  align-items: center;
}

header.title a.historyback {background-color: red;    padding: 5px;}



  html[lang] header.title a.historyback {
           background-color: #36baf1;
        padding: 5px;
      }


.title span {
  font-size: 18px;
}

.alinkback {
  font-size: 16px;
  display: inline-block;
  padding: 1px 20px;
  background-color: #ff1744;
  color: #fff;
  text-decoration: none;
  border-radius: 5px;
}


@media screen and (orientation: portrait) {
  .beian {
    display: none;
  }
}