:root {
    --primary-color: #2c3e50;
    --secondary-color: #3498db;
    --light-color: #f9f9f9;
    --border-color: #eaeaea;
    --text-color: #333;
    --text-light: #7f8c8d;
}

/* 段落样式 */
.paragraph {
    margin-bottom: 30px;
    padding-bottom: 20px;
    border-bottom: 1px solid var(--border-color);
    position: relative;
}

.paragraph:last-child {
    border-bottom: none;
}

.paragraph-id {
    font-size: 0.8rem;
    color: var(--text-light);
    margin-bottom: 8px;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.section-title {
    font-size: 1.1rem;
    color: var(--primary-color);
    margin: 20px 0 12px;
    padding-bottom: 6px;
    border-bottom: 1px solid var(--border-color);
    font-weight: normal;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.footer {
    text-align: center;
    padding: 15px;
    color: var(--text-light);
    font-size: 0.85rem;
    background-color: var(--light-color);
    border-top: 1px solid var(--border-color);
}