body {
    font-family: sans-serif;
    background-color: #f6f6f6;
    color: #202122;
    margin: 0;
    padding: 20px;
}

.container {
    max-width: 950px;
    margin: 0 auto;
    background-color: #ffffff;
    border: 1px solid #a7d7f9;
    padding: 20px 40px;
}

h1, h2, h3 {
    border-bottom: 1px solid #a2a9b1;
    padding-bottom: 5px;
    font-weight: normal;
}

h1 {
    font-size: 1.8em;
}

h2 {
    font-size: 1.5em;
    margin-top: 30px;
}

#toc {
    border: 1px solid #a2a9b1;
    background-color: #f8f9fa;
    padding: 15px;
    display: inline-block;
}

#toc h2 {
    font-size: 1.2em;
    text-align: center;
    border-bottom: none;
    margin: 0 0 10px 0;
}

#toc ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

#toc ul li {
    margin-bottom: 5px;
}

a {
    color: #3366cc;
    text-decoration: none;
}

a:hover {
    text-decoration: underline;
}

.item {
    display: flex;
    align-items: flex-start;
    margin-top: 20px;
    border-bottom: 1px solid #eaecf0;
    padding-bottom: 15px;
}

.item img {
    width: 100px;
    height: 100px;
    object-fit: cover;
    margin-right: 20px;
    border: 1px solid #ccc;
}

.item-content {
    flex: 1;
}

.item-content h3 {
    margin: 0 0 10px 0;
    font-size: 1.2em;
    border: none;
}

.item-content p {
    margin: 0 0 10px 0;
}

.download-link {
    display: inline-block;
    background-color: #eaf3ff;
    border: 1px solid #a7d7f9;
    padding: 5px 10px;
    border-radius: 4px;
    font-weight: bold;
}