nav {
    margin: 5% 20% 0 20%;
    font-size: 25px;
}

nav a {
    color: inherit;
    text-decoration: none;
}

nav a:hover {
    text-decoration: underline;
    text-decoration-style: wavy;
}

main {
    margin: 0 20% 0 20%;
}

footer {
    margin: 0 20% 5% 20%;
    font-size: 25px;
    display: flex;
    justify-content: right;
}

article {
    margin: 0 5% 1% 5%;
    font-size: 15pt;
    letter-spacing: 1px;
    line-height: 1.9;
    text-align: justify;
}

/* 引用三栏 */
.quotes {
    display: flex;
    gap: 2%;
    align-items: flex-start;
    margin-bottom: 2rem;
}

.quote-card {
    flex: 1;
    border-left: 2px solid #ccc;
    padding-left: 1rem;
    font-size: 13pt;
    color: #444;
}

.quote-source {
    display: block;
    margin-top: 0.5rem;
    font-size: 11pt;
    color: #888;
    text-align: right;
}

/* 分隔线 */
.divider {
    border: none;
    border-top: 1px solid #ddd;
    margin: 2rem 0;
}

/* 正文区域 */
.essay p {
    margin-bottom: 1.2em;
}

.essay .dialogue {
    color: #666;
    padding-left: 1.5em;
    border-left: 3px solid #ccc;
    font-style: italic;
    margin: 1.5em 0;
}

em {
    font-style: normal;
    text-decoration: underline;
    text-decoration-style: dotted;
}

/* 响应式 */
@media (max-width: 900px) {
    nav, main, footer {
        margin-left: 5%;
        margin-right: 5%;
    }

    article {
        margin-left: 0;
        margin-right: 0;
    }

    .quotes {
        flex-direction: column;
    }

    .quote-card {
        width: 100%;
    }
}