/* 章节特定样式 */
.chapter-hero {
    height: 70vh;
    min-height: 500px;
}

.chapter-hero-bg {
    background: linear-gradient(to right, rgba(0, 0, 0, 0.8), rgba(139, 0, 0, 0.6)), url('../images/index.jpg') no-repeat center center/cover;
}

.chapter-content {
    padding: var(--spacing-xl) var(--spacing-md);
    max-width: 1000px;
}

/* 移动端增加更多左右边距 */
@media (max-width: 768px) {
    .chapter-content {
        padding: var(--spacing-xl) var(--spacing-lg);
    }
}

@media (max-width: 480px) {
    .chapter-content {
        padding: var(--spacing-xl) var(--spacing-xl);
    }
}

.chapter-section {
    margin-bottom: var(--spacing-xxl);
    opacity: 0;
    transform: translateY(30px);
}

.chapter-section.visible {
    opacity: 1;
    transform: translateY(0);
    transition: opacity var(--transition-slow), transform var(--transition-slow);
}

.chapter-section-title {
    position: relative;
    margin-bottom: var(--spacing-xl);
    padding-bottom: var(--spacing-sm);
    display: inline-block;
}

.chapter-section-title::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 60%;
    height: 3px;
    background-color: var(--primary-dark);
}

.chapter-image {
    width: 40%;
    height: auto;
    margin: var(--spacing-lg) auto;
    display: block;
    border-radius: 8px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

@media (max-width: 768px) {
    .chapter-image {
        width: 70%;
    }
}

.chapter-quote {
    font-family: var(--font-serif);
    font-size: 1.25rem;
    font-style: italic;
    padding: var(--spacing-lg);
    margin: var(--spacing-xl) 0;
    position: relative;
    border-left: 4px solid var(--primary-dark);
}

.light-theme .chapter-quote {
    background-color: var(--neutral-lightest);
}

.dark-theme .chapter-quote {
    background-color: var(--neutral-mid);
}

.chapter-quote-author {
    display: block;
    font-style: normal;
    font-weight: 500;
    margin-top: var(--spacing-md);
    text-align: right;
}

.chapter-navigation {
    display: flex;
    justify-content: space-between;
    margin-top: var(--spacing-xxl);
    padding-top: var(--spacing-lg);
    border-top: 1px solid var(--neutral-light);
}

.dark-theme .chapter-navigation {
    border-top-color: var(--neutral-mid);
}

.nav-button {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md);
    transition: all var(--transition-fast);
}

.nav-button:hover {
    color: var(--primary-dark);
}

.nav-button svg {
    width: 20px;
    height: 20px;
}

.nav-button-text {
    display: flex;
    flex-direction: column;
}

.nav-button-label {
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    opacity: 0.7;
}

.nav-button-title {
    font-weight: 500;
}

.timeline-point {
    position: relative;
    padding-left: 30px;
    margin-bottom: var(--spacing-lg);
}

.timeline-point::before {
    content: '';
    position: absolute;
    left: 0;
    top: 8px;
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background-color: var(--primary-dark);
}

.timeline-point::after {
    content: '';
    position: absolute;
    left: 6px;
    top: 20px;
    width: 1px;
    height: calc(100% + var(--spacing-md));
    background-color: var(--neutral-light);
}

.dark-theme .timeline-point::after {
    background-color: var(--neutral-mid);
}

.timeline-point:last-child::after {
    display: none;
}

.timeline-date {
    font-weight: 700;
    color: var(--primary-dark);
    margin-bottom: var(--spacing-xs);
}

.timeline-title {
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
}

.key-figure {
    display: flex;
    flex-direction: column;
    align-items: center;
    margin-bottom: var(--spacing-xl);
}

@media (min-width: 768px) {
    .key-figure {
        flex-direction: row;
        gap: var(--spacing-xl);
    }
}

.key-figure-image {
    width: 200px;
    height: 200px;
    border-radius: 50%;
    object-fit: cover;
    margin-bottom: var(--spacing-md);
}

@media (min-width: 768px) {
    .key-figure-image {
        margin-bottom: 0;
    }
}

.key-figure-content {
    flex: 1;
}

.key-figure-name {
    font-weight: 700;
    font-size: 1.25rem;
    margin-bottom: var(--spacing-xs);
}

.key-figure-title {
    font-style: italic;
    margin-bottom: var(--spacing-md);
    color: var(--neutral-mid);
}

.dark-theme .key-figure-title {
    color: var(--neutral-light);
}

.two-column {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-xl);
}

@media (min-width: 768px) {
    .two-column {
        grid-template-columns: 1fr 1fr;
    }
}