/* 导航栏样式 */
.navbar {
    background-color: var(--primary-color);
}

.navbar-brand,
.nav-link {
    color: white !important;
}

.nav-link.active {
    font-weight: bold;
}

/* 页面标题 */
.page-header {
    background-color: var(--primary-color);
    color: white;
    padding: 60px 0 40px;
    margin-top: 56px;
}

.main-title {
    font-size: 2.5rem;
    font-weight: bold;
    margin-bottom: 1rem;
}

.sub-title {
    font-size: 1.2rem;
    opacity: 0.9;
}

/* 时间轴容器 */
.timeline-container {
    max-width: 1000px;
    margin: 0 auto;
    padding: 20px;
}

/* 时代选择器 */
.era-tabs {
    display: flex;
    justify-content: center;
    margin: 20px 0;
    background: white;
    padding: 10px;
    border-radius: 4px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.tab {
    padding: 8px 20px;
    margin: 0 5px;
    cursor: pointer;
    border-radius: 20px;
    transition: all 0.3s ease;
}

.tab.active {
    background-color: var(--primary-color);
    color: white;
}

/* 时间轴内容 */
.era-section {
    display: none;
    margin: 30px 0;
}

.era-section.active {
    display: block;
}

.year-label {
    display: inline-block;
    background-color: var(--primary-color);
    color: white;
    padding: 5px 15px;
    border-radius: 20px;
    margin-bottom: 15px;
}

.content-box {
    background: white;
    padding: 20px;
    border-radius: 4px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.content-box h3 {
    color: var(--primary-color);
    margin-bottom: 15px;
    font-size: 1.5rem;
}

.spirit-desc {
    margin-bottom: 20px;
}

.quote {
    color: var(--secondary-color);
    font-style: italic;
    border-left: 3px solid var(--secondary-color);
    padding-left: 15px;
    margin: 15px 0;
}

.key-events {
    margin-top: 20px;
}

.key-events h4 {
    color: var(--primary-color);
    margin-bottom: 10px;
    font-size: 1.2rem;
}

.key-events ul {
    list-style: none;
    padding-left: 0;
}

.key-events li {
    margin-bottom: 8px;
    padding-left: 20px;
    position: relative;
}

.key-events li:before {
    content: "•";
    color: var(--primary-color);
    position: absolute;
    left: 0;
}

/* 精神标签 */
.spirit-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-top: 15px;
}

.tag {
    background-color: var(--bg-primary);
    color: var(--primary-color);
    padding: 5px 15px;
    border-radius: 15px;
    font-size: 0.9rem;
}

/* 响应式调整 */
@media (max-width: 768px) {
    .timeline-container {
        padding: 10px;
    }

    .era-tabs {
        flex-wrap: nowrap;
        overflow-x: auto;
        padding: 5px;
    }

    .tab {
        padding: 6px 15px;
        font-size: 0.9rem;
        white-space: nowrap;
    }

    .content-box {
        padding: 15px;
    }

    .main-title {
        font-size: 2rem;
    }
}