/* ===== 全局样式重置 ===== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* 中国传统色彩 */
    --color-primary: #8b4513;        /* 赭石色 */
    --color-secondary: #c0392b;      /* 朱红 */
    --color-accent: #d4af37;         /* 金色 */
    --color-dark: #2c3e50;           /* 墨青 */
    --color-light: #f8f9fa;          /* 米白 */
    --color-text: #333333;           /* 深灰 */
    --color-text-light: #666666;     /* 中灰 */
    --color-overlay: rgba(0, 0, 0, 0.6);
    
    /* 字体 */
    --font-title: 'Ma Shan Zheng', 'Noto Serif SC', serif;
    --font-body: 'Noto Serif SC', serif;
    
    /* 间距 */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 3rem;
    --spacing-xl: 4rem;
    
    /* 过渡 */
    --transition-fast: 0.3s ease;
    --transition-normal: 0.5s ease;
    --transition-slow: 0.8s ease;
}

html {
    scroll-behavior: smooth;
    overflow-x: hidden;
}

body {
    font-family: var(--font-body);
    color: var(--color-text);
    background-color: var(--color-dark);
    line-height: 1.8;
    overflow-x: hidden;
}

/* ===== 导航栏样式 ===== */
.nav-bar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: linear-gradient(to bottom, rgba(0,0,0,0.8), rgba(0,0,0,0.4));
    backdrop-filter: blur(10px);
    padding: 1rem 0;
    transition: all var(--transition-normal);
}

.nav-bar.scrolled {
    background: rgba(0,0,0,0.95);
    box-shadow: 0 2px 20px rgba(0,0,0,0.3);
}

.nav-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-logo {
    font-family: var(--font-title);
    font-size: 1.8rem;
    color: var(--color-accent);
    font-weight: bold;
    letter-spacing: 0.1em;
    text-shadow: 2px 2px 4px rgba(0,0,0,0.5);
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 2rem;
}

.nav-link {
    color: var(--color-light);
    text-decoration: none;
    font-size: 1rem;
    padding: 0.5rem 1rem;
    position: relative;
    transition: all var(--transition-fast);
    border-radius: 4px;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 0;
    height: 2px;
    background: var(--color-accent);
    transition: width var(--transition-fast);
}

.nav-link:hover,
.nav-link.active {
    color: var(--color-accent);
}

.nav-link:hover::after,
.nav-link.active::after {
    width: 80%;
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 0.4rem;
    cursor: pointer;
}

.nav-toggle span {
    width: 25px;
    height: 3px;
    background: var(--color-light);
    border-radius: 2px;
    transition: all var(--transition-fast);
}

/* ===== 滚动指示器 ===== */
.scroll-indicator {
    position: fixed;
    right: 2rem;
    top: 50%;
    transform: translateY(-50%);
    z-index: 999;
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.scroll-dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: rgba(255,255,255,0.3);
    cursor: pointer;
    transition: all var(--transition-fast);
    border: 2px solid transparent;
}

.scroll-dot:hover {
    background: rgba(255,255,255,0.6);
    transform: scale(1.2);
}

.scroll-dot.active {
    background: var(--color-accent);
    border-color: rgba(255,255,255,0.5);
    transform: scale(1.3);
}

/* ===== 主容器 ===== */
.main-container {
    position: relative;
    width: 100%;
}

/* ===== 页面通用样式 ===== */
.page {
    position: relative;
    width: 100%;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transform: translateY(50px);
    transition: all var(--transition-slow);
}

.page.active,
.page.visible {
    opacity: 1;
    transform: translateY(0);
}

.page-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    z-index: -2;
}

.page-bg::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--color-overlay);
    z-index: -1;
}

.page-content {
    position: relative;
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 6rem 2rem 4rem;
    z-index: 1;
}

.content-wrapper {
    opacity: 0;
    transform: translateY(30px);
    transition: all var(--transition-slow);
}

.page.active .content-wrapper,
.page.visible .content-wrapper {
    opacity: 1;
    transform: translateY(0);
}

/* ===== 标题样式 ===== */
.page-title {
    font-family: var(--font-title);
    font-size: 4rem;
    color: var(--color-accent);
    text-align: center;
    margin-bottom: 1rem;
    text-shadow: 3px 3px 6px rgba(0,0,0,0.7);
    letter-spacing: 0.2em;
    animation: titleFloat 3s ease-in-out infinite;
}

@keyframes titleFloat {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-10px); }
}

.page-subtitle {
    font-size: 1.5rem;
    color: var(--color-light);
    text-align: center;
    margin-bottom: 3rem;
    letter-spacing: 0.3em;
    opacity: 0.9;
}

.page-text {
    color: var(--color-light);
    font-size: 1.1rem;
    line-height: 2;
    max-width: 900px;
    margin: 0 auto;
}

.page-text p {
    margin-bottom: 1.5rem;
    text-indent: 2em;
}

/* ===== 滚动提示 ===== */
.scroll-hint {
    position: absolute;
    bottom: 3rem;
    left: 50%;
    transform: translateX(-50%);
    text-align: center;
    color: var(--color-light);
    opacity: 0.8;
    animation: bounce 2s infinite;
}

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% { transform: translateX(-50%) translateY(0); }
    40% { transform: translateX(-50%) translateY(-10px); }
    60% { transform: translateX(-50%) translateY(-5px); }
}

.arrow-down {
    width: 2px;
    height: 40px;
    background: var(--color-accent);
    margin: 0.5rem auto;
    position: relative;
}

.arrow-down::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 0;
    height: 0;
    border-left: 8px solid transparent;
    border-right: 8px solid transparent;
    border-top: 12px solid var(--color-accent);
}

/* ===== 时间线样式 ===== */
.timeline {
    margin-top: 3rem;
    position: relative;
    padding-left: 3rem;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 2px;
    background: linear-gradient(to bottom, var(--color-accent), var(--color-secondary));
}

.timeline-item {
    margin-bottom: 2rem;
    position: relative;
}

.timeline-item::before {
    content: '';
    position: absolute;
    left: -3.5rem;
    top: 0.5rem;
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: var(--color-accent);
    border: 3px solid var(--color-dark);
}

.timeline-year {
    font-weight: bold;
    color: var(--color-accent);
    font-size: 1.2rem;
    margin-bottom: 0.5rem;
}

.timeline-content {
    color: var(--color-light);
    font-size: 1rem;
    line-height: 1.6;
}

/* ===== 信息网格 ===== */
.info-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.info-card {
    background: rgba(255,255,255,0.1);
    backdrop-filter: blur(10px);
    padding: 2rem;
    border-radius: 12px;
    border: 1px solid rgba(255,255,255,0.2);
    transition: all var(--transition-fast);
}

.info-card:hover {
    transform: translateY(-10px);
    background: rgba(255,255,255,0.15);
    box-shadow: 0 10px 30px rgba(0,0,0,0.3);
}

.info-card h3 {
    color: var(--color-accent);
    font-size: 1.3rem;
    margin-bottom: 1rem;
    text-align: center;
}

.info-card p {
    color: var(--color-light);
    text-align: center;
    line-height: 1.8;
}

/* ===== 建筑统计 ===== */
.building-stats {
    display: flex;
    justify-content: space-around;
    flex-wrap: wrap;
    gap: 2rem;
    margin-top: 3rem;
}

.stat-item {
    text-align: center;
}

.stat-number {
    font-size: 4rem;
    font-weight: bold;
    color: var(--color-accent);
    font-family: var(--font-title);
    text-shadow: 2px 2px 4px rgba(0,0,0,0.5);
}

.stat-label {
    font-size: 1.2rem;
    color: var(--color-light);
    margin-top: 0.5rem;
}

/* ===== 文化网格 ===== */
.culture-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.culture-card {
    background: rgba(255,255,255,0.1);
    backdrop-filter: blur(10px);
    padding: 2rem;
    border-radius: 12px;
    border: 2px solid transparent;
    text-align: center;
    transition: all var(--transition-fast);
}

.culture-card:hover {
    border-color: var(--color-accent);
    transform: translateY(-10px) scale(1.05);
    background: rgba(255,255,255,0.15);
}

.card-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.culture-card h3 {
    color: var(--color-accent);
    font-size: 1.3rem;
    margin-bottom: 1rem;
}

.culture-card p {
    color: var(--color-light);
    font-size: 0.95rem;
}

/* ===== 引用块 ===== */
.quote {
    background: rgba(212,175,55,0.1);
    border-left: 4px solid var(--color-accent);
    padding: 1.5rem 2rem;
    margin: 2rem 0;
    color: var(--color-light);
    font-style: italic;
    line-height: 2;
}

/* ===== 生活场景 ===== */
.life-scenes {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.scene-item {
    background: rgba(255,255,255,0.1);
    padding: 2rem;
    border-radius: 12px;
    border-left: 4px solid var(--color-accent);
    transition: all var(--transition-fast);
}

.scene-item:hover {
    background: rgba(255,255,255,0.15);
    transform: translateX(10px);
}

.scene-item h4 {
    color: var(--color-accent);
    font-size: 1.3rem;
    margin-bottom: 0.5rem;
}

.scene-item p {
    color: var(--color-light);
}

/* ===== 访问链接 ===== */
.visit-links {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    max-width: 500px;
    margin: 3rem auto;
}

.visit-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1rem;
    padding: 1.5rem 2rem;
    border-radius: 12px;
    text-decoration: none;
    font-size: 1.2rem;
    font-weight: 600;
    transition: all var(--transition-fast);
    border: 2px solid transparent;
}

.visit-btn.primary {
    background: var(--color-accent);
    color: var(--color-dark);
}

.visit-btn.primary:hover {
    background: var(--color-secondary);
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(212,175,55,0.4);
}

.visit-btn.secondary {
    background: rgba(255,255,255,0.1);
    color: var(--color-light);
    border-color: var(--color-accent);
}

.visit-btn.secondary:hover {
    background: rgba(212,175,55,0.2);
    border-color: var(--color-accent);
    transform: translateY(-5px);
}

.btn-icon {
    font-size: 1.5rem;
}

.footer-info {
    text-align: center;
    margin-top: 4rem;
    color: var(--color-light);
    opacity: 0.8;
}

.footer-info p {
    margin: 0.5rem 0;
}

/* ===== 页脚 ===== */
.footer {
    background: rgba(0,0,0,0.9);
    padding: 2rem;
    text-align: center;
    color: var(--color-light);
}

.footer-links {
    margin-bottom: 1rem;
}

.footer-links a {
    color: var(--color-light);
    text-decoration: none;
    margin: 0 1rem;
    transition: color var(--transition-fast);
}

.footer-links a:hover {
    color: var(--color-accent);
}

.footer-links span {
    color: var(--color-text-light);
}

.copyright {
    font-size: 0.9rem;
    opacity: 0.7;
}

/* ===== 响应式设计 ===== */
@media (max-width: 1024px) {
    .page-title {
        font-size: 3rem;
    }
    
    .nav-menu {
        gap: 1rem;
    }
    
    .nav-link {
        font-size: 0.9rem;
        padding: 0.4rem 0.8rem;
    }
}

@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        top: 70px;
        left: -100%;
        width: 100%;
        height: calc(100vh - 70px);
        background: rgba(0,0,0,0.98);
        flex-direction: column;
        align-items: center;
        justify-content: center;
        gap: 2rem;
        transition: left var(--transition-normal);
    }
    
    .nav-menu.active {
        left: 0;
    }
    
    .nav-toggle {
        display: flex;
    }
    
    .page-title {
        font-size: 2.5rem;
    }
    
    .page-subtitle {
        font-size: 1.2rem;
    }
    
    .page-text {
        font-size: 1rem;
    }
    
    .scroll-indicator {
        right: 1rem;
    }
    
    .timeline {
        padding-left: 2rem;
    }
    
    .info-grid,
    .culture-grid,
    .life-scenes {
        grid-template-columns: 1fr;
    }
    
    .building-stats {
        flex-direction: column;
        gap: 1.5rem;
    }
}

@media (max-width: 480px) {
    .page-title {
        font-size: 2rem;
        letter-spacing: 0.1em;
    }
    
    .page-subtitle {
        font-size: 1rem;
    }
    
    .nav-logo {
        font-size: 1.5rem;
    }
    
    .page-content {
        padding: 5rem 1.5rem 3rem;
    }
    
    .stat-number {
        font-size: 3rem;
    }
    
    .stat-label {
        font-size: 1rem;
    }
}