* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}
html {
    margin: 0;
    padding: 0;
    line-height: 1.5;
    -webkit-touch-callout: none;
    -webkit-user-select: none;
    user-select: none;
}
body {
    max-width: 800px;
    margin: 0 auto;
    padding: 0;
    color: #4c4c4c;
    font: 16px/1.5 "Microsoft YaHei", sans-serif;
}

img {
  display: inline;
  vertical-align: middle;
  margin: 1px;
  padding: 0;
  max-width: 100%;
  white-space: nowrap;
}

.headera {
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
    margin: 0 auto;
    max-width: 800px;
    height: 44px;
    padding: 0 10px;
    font-size: 14px;
    box-sizing: border-box;
    background: #007fff;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 9;
}
.headera h3 {
    font-size: 19px;
    font-weight: normal;
    color: #ffffff;
    margin: 0;
}
.headera a {
    padding: 2px 8px;
    color: #ffffff;
    border: 1px solid #ccc;
    border-radius: 3px;
    transition: background-color 0.3s ease;
}
.headera a:hover {
    background-color: rgba(255, 255, 255, 0.1);
}
a {
    text-decoration: none;
}

#output {
    text-align: center;
    margin: 0 auto;
    padding: 0px;
    max-width: 800px;
}
#output > * {
    display: block;
    margin: 0 auto;
    text-align: center;
}
#output table, #output img {
    margin: 0 auto;
}

.container {
    word-wrap: break-word;
    overflow-wrap: break-word;
    white-space: normal;
    text-align: center;
}
.container p {
    margin: 0;
}
.container pre {
    line-height: 1.2;
}

.back-button {
    padding: 9px 20px;
    font-size: 14px;
    color: white;
    background-color: #FF1CAE;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    transition: background-color 0.3s ease;
}
.back-button:hover {
    background-color: #007BFF;
}