/* ============================================
   现代学术风格样式表
   Modern Academic Style
   =========================================== */

/* CSS 变量定义 */
:root {
    /* 色彩系统 - 更沉稳的学术蓝 */
    --color-primary: #1a365d;
    --color-primary-light: #2563eb;
    --color-primary-dark: #0f172a;
    
    /* 中性色 */
    --color-text-primary: #1e293b;
    --color-text-secondary: #64748b;
    --color-text-muted: #94a3b8;
    
    /* 背景色（更克制、偏暖白） */
    --color-bg-primary: #fafaf8;
    --color-bg-secondary: #f4f5f2;
    --color-bg-tertiary: #eef0ec;
    
    /* 边框和阴影 */
    --color-border: #e2e8f0;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    
    /* 间距系统 */
    --spacing-xs: 0.5rem;
    --spacing-sm: 0.75rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    --spacing-3xl: 4rem;
    --spacing-4xl: 6rem;
    
    /* 字体系统 */
    --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Inter', 'Roboto', 'Helvetica Neue', Arial, sans-serif;
    --font-mono: 'SF Mono', 'Monaco', 'Inconsolata', 'Fira Code', monospace;
    
    /* 圆角 */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    
    /* 过渡 */
    --transition-fast: 150ms ease;
    --transition-normal: 250ms ease;
    --transition-slow: 350ms ease;
}

/* ============================================
   基础重置和全局样式
   =========================================== */

*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-sans);
    font-size: 16px;
    line-height: 1.7;
    color: var(--color-text-primary);
    background-color: var(--color-bg-primary);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-xl);
}

/* ============================================
   排版系统
   =========================================== */

h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    line-height: 1.3;
    color: var(--color-text-primary);
    letter-spacing: -0.025em;
}

h1 { font-size: 2.5rem; }
h2 { font-size: 2rem; }
h3 { font-size: 1.5rem; }
h4 { font-size: 1.25rem; }

p {
    margin-bottom: var(--spacing-md);
    color: var(--color-text-secondary);
}

a {
    color: var(--color-primary-light);
    text-decoration: none;
    transition: color var(--transition-fast);
}

a:hover {
    color: var(--color-primary);
}

/* ============================================
   按钮组件
   =========================================== */

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.75rem 1.5rem;
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--color-bg-primary);
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-light) 100%);
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-normal);
    box-shadow: var(--shadow-sm);
}

.btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
    color: var(--color-bg-primary);
}

.btn-outline {
    background: transparent;
    color: var(--color-primary);
    border: 2px solid var(--color-primary);
}

.btn-outline:hover {
    background: var(--color-primary);
    color: var(--color-bg-primary);
}

/* ============================================
   头部导航
   =========================================== */

.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--color-border);
    transition: all var(--transition-normal);
}

.header.scrolled {
    box-shadow: var(--shadow-sm);
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 72px;
}

.logo a {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--color-primary);
    letter-spacing: -0.02em;
}

.nav-menu {
    display: flex;
    align-items: center;
    list-style: none;
    gap: var(--spacing-xl);
}

.nav-link {
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--color-text-secondary);
    padding: 0.5rem 0;
    position: relative;
    transition: color var(--transition-fast);
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--color-primary-light);
    transition: width var(--transition-normal);
}

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

.nav-link:hover::after {
    width: 100%;
}

/* language-switcher 已移除（中文单语言站） */

/* ============================================
   主内容区域
   =========================================== */

main {
    margin-top: 72px;
}

/* ============================================
   通用卡片（MIT/Stanford lab 风格）
   =========================================== */

.cards-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-xl);
}

.cards-grid--wide {
    grid-template-columns: repeat(3, 1fr);
}

.card {
    background: rgba(255, 255, 255, 0.75);
    border: 1px solid rgba(226, 232, 240, 0.9);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    overflow: hidden;
    transition: all var(--transition-normal);
}

.card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: rgba(226, 232, 240, 0.6);
    background: rgba(255, 255, 255, 0.9);
}

.card-link {
    display: block;
    padding: var(--spacing-xl);
    color: inherit;
}

.card-meta {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-sm);
}

.meta {
    font-size: 0.85rem;
    color: var(--color-text-muted);
    font-family: var(--font-mono);
}

.tag {
    display: inline-flex;
    align-items: center;
    height: 1.5rem;
    padding: 0 0.5rem;
    font-size: 0.8rem;
    color: var(--color-primary);
    background: rgba(37, 99, 235, 0.08);
    border: 1px solid rgba(37, 99, 235, 0.18);
    border-radius: 999px;
    white-space: nowrap;
}

.card-title {
    font-size: 1.25rem;
    line-height: 1.35;
    margin-bottom: var(--spacing-sm);
}

.card-summary {
    margin: 0;
    font-size: 0.95rem;
    color: var(--color-text-secondary);
    line-height: 1.65;
}

/* 小按钮（用于 publications 条目链接） */
.btn.btn-sm {
    padding: 0.4rem 0.75rem;
    font-size: 0.85rem;
    border-radius: var(--radius-sm);
}

/* ============================================
   Hero 区域 - 现代化学术风格
   =========================================== */

.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    background: radial-gradient(circle at 30% 20%, rgba(37, 99, 235, 0.16) 0%, transparent 45%),
                radial-gradient(circle at 70% 70%, rgba(26, 54, 93, 0.14) 0%, transparent 55%),
                linear-gradient(180deg, #0f172a 0%, #0b1220 100%);
    color: var(--color-bg-primary);
    overflow: hidden;
    padding: var(--spacing-4xl) 0;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        radial-gradient(circle at 20% 80%, rgba(37, 99, 235, 0.15) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, rgba(59, 130, 246, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 40% 40%, rgba(255, 255, 255, 0.05) 0%, transparent 50%);
    pointer-events: none;
}

.hero-content {
    position: relative;
    z-index: 1;
    max-width: 800px;
    text-align: center;
    margin: 0 auto;
    padding: 0 var(--spacing-xl);
}

.hero-content h1 {
    font-size: clamp(2.5rem, 6vw, 4rem);
    font-weight: 700;
    color: var(--color-bg-primary);
    margin-bottom: var(--spacing-xl);
    letter-spacing: -0.03em;
    line-height: 1.1;
    opacity: 0;
    animation: fadeInUp 1s ease-out 0.2s forwards;
}

.hero-content p {
    font-size: clamp(1rem, 2vw, 1.25rem);
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: var(--spacing-2xl);
    line-height: 1.7;
    max-width: 650px;
    margin-left: auto;
    margin-right: auto;
    opacity: 0;
    animation: fadeInUp 1s ease-out 0.4s forwards;
}

.hero-content .btn {
    font-size: 1rem;
    padding: 1rem 2rem;
    font-weight: 600;
    opacity: 0;
    animation: fadeInUp 1s ease-out 0.6s forwards;
    background: var(--color-bg-primary);
    color: var(--color-primary);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

.hero-content .btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.2);
    background: rgba(255, 255, 255, 0.95);
}

/* ============================================
   Section 标题样式
   =========================================== */

.section-header {
    text-align: center;
    margin-bottom: var(--spacing-3xl);
}

.section-header h2 {
    font-size: 2.25rem;
    font-weight: 700;
    color: var(--color-text-primary);
    margin-bottom: var(--spacing-md);
}

.section-header p {
    font-size: 1.125rem;
    color: var(--color-text-secondary);
    max-width: 600px;
    margin: 0 auto;
}

.section-header::after {
    content: '';
    display: block;
    width: 60px;
    height: 4px;
    background: linear-gradient(90deg, var(--color-primary) 0%, var(--color-primary-light) 100%);
    margin: var(--spacing-lg) auto 0;
    border-radius: 2px;
}

.section-actions {
    text-align: center;
    margin-top: var(--spacing-2xl);
}

/* ============================================
   About 区域
   =========================================== */

.about {
    padding: var(--spacing-4xl) 0;
    background: var(--color-bg-primary);
}

.about-content {
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
}

.about-content p {
    font-size: 1.125rem;
    line-height: 1.8;
    color: var(--color-text-secondary);
}

/* ============================================
   Stats 区域 - 数据展示
   =========================================== */

.stats {
    padding: var(--spacing-4xl) 0;
    background: var(--color-bg-secondary);
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--spacing-xl);
}

.stats-item {
    text-align: center;
    padding: var(--spacing-2xl);
    background: var(--color-bg-primary);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-normal);
    border: 1px solid var(--color-border);
}

.stats-item:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.stats-item h3 {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--color-primary);
    margin-bottom: var(--spacing-sm);
    font-family: var(--font-mono);
}

.stats-item p {
    font-size: 0.95rem;
    color: var(--color-text-secondary);
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin: 0;
}

/* ============================================
   Research 区域 - 研究方向卡片
   =========================================== */

.research {
    padding: var(--spacing-4xl) 0;
    background: var(--color-bg-primary);
}

.research-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--spacing-xl);
}

.research-item {
    padding: var(--spacing-2xl);
    background: var(--color-bg-primary);
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-border);
    transition: all var(--transition-normal);
    position: relative;
    overflow: hidden;
}

.research-item::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--color-primary) 0%, var(--color-primary-light) 100%);
    transform: scaleX(0);
    transition: transform var(--transition-normal);
}

.research-item:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg);
    border-color: transparent;
}

.research-item:hover::before {
    transform: scaleX(1);
}

.research-item h3 {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--color-text-primary);
    margin-bottom: var(--spacing-md);
}

.research-item p {
    font-size: 0.95rem;
    line-height: 1.7;
    color: var(--color-text-secondary);
    margin: 0;
}

/* ============================================
   Publications 区域 - 学术期刊风格
   =========================================== */

.publications {
    padding: var(--spacing-4xl) 0;
    background: var(--color-bg-secondary);
}

.publications-list {
    margin-bottom: var(--spacing-2xl);
}

.publication-item {
    padding: var(--spacing-xl);
    background: var(--color-bg-primary);
    border-radius: var(--radius-lg);
    margin-bottom: var(--spacing-md);
    border: 1px solid var(--color-border);
    transition: all var(--transition-normal);
    position: relative;
    padding-left: calc(var(--spacing-xl) + 4px);
}

.publication-item::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 4px;
    background: linear-gradient(180deg, var(--color-primary) 0%, var(--color-primary-light) 100%);
    border-radius: var(--radius-lg) 0 0 var(--radius-lg);
}

.publication-item:hover {
    box-shadow: var(--shadow-md);
    border-color: var(--color-primary-light);
}

.publication-item h3 {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--color-text-primary);
    margin-bottom: var(--spacing-sm);
    line-height: 1.4;
}

.publication-item h3 a {
    color: var(--color-text-primary);
}

.publication-item h3 a:hover {
    color: var(--color-primary-light);
}

.publication-meta {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: 0.9rem;
    color: var(--color-text-muted);
    margin-bottom: var(--spacing-sm);
}

.publication-meta .journal {
    color: var(--color-primary);
    font-weight: 600;
}

.publication-meta .year {
    font-family: var(--font-mono);
    background: var(--color-bg-tertiary);
    padding: 0.125rem 0.5rem;
    border-radius: var(--radius-sm);
    font-size: 0.85rem;
}

.publication-authors {
    font-size: 0.9rem;
    color: var(--color-text-secondary);
    font-style: italic;
}

/* Publications 列表页（按年分组） */
.pubs-year-title {
    margin-top: var(--spacing-2xl);
    margin-bottom: var(--spacing-lg);
    font-size: 1.5rem;
}

.pub {
    display: grid;
    grid-template-columns: 1fr auto;
    gap: var(--spacing-lg);
    padding: var(--spacing-xl);
    background: rgba(255, 255, 255, 0.75);
    border: 1px solid rgba(226, 232, 240, 0.9);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
}

.pub + .pub {
    margin-top: var(--spacing-md);
}

.pub-title {
    font-size: 1.1rem;
    margin-bottom: var(--spacing-sm);
}

.pub-meta {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
    align-items: center;
    margin-bottom: var(--spacing-sm);
}

.pub-venue {
    color: var(--color-primary);
    font-weight: 600;
}

.pub-year {
    font-family: var(--font-mono);
    background: var(--color-bg-tertiary);
    padding: 0.125rem 0.5rem;
    border-radius: var(--radius-sm);
    font-size: 0.85rem;
    color: var(--color-text-muted);
}

.pub-authors {
    color: var(--color-text-secondary);
    font-size: 0.9rem;
    margin-bottom: var(--spacing-sm);
}

.pub-abstract {
    margin: 0;
    color: var(--color-text-secondary);
    font-size: 0.95rem;
    line-height: 1.65;
}

.pub-actions {
    display: flex;
    gap: var(--spacing-sm);
    align-items: flex-start;
    flex-wrap: wrap;
    justify-content: flex-end;
}

.publications-hero {
    min-height: 220px;
    display: flex;
    align-items: flex-end;
    padding: 2.5rem 0;
    color: #fff;
    background: linear-gradient(rgba(15, 23, 42, 0.45), rgba(15, 23, 42, 0.45)),
                linear-gradient(135deg, #1f3d33 0%, #2f4f73 100%);
}

.publications-hero h1 {
    color: #fff;
    font-size: 2.4rem;
    margin: 0;
}

.publications-breadcrumb {
    background: #f0f2f5;
    border-top: 1px solid #e2e8f0;
    border-bottom: 1px solid #e2e8f0;
    font-size: 0.9rem;
}

.publications-breadcrumb .container {
    padding-top: 0.75rem;
    padding-bottom: 0.75rem;
    display: flex;
    gap: 0.5rem;
    align-items: center;
    color: #64748b;
}

.publications-page {
    background: #f5f6f8;
}

.publications-topbar {
    display: flex;
    justify-content: space-between;
    gap: 1rem;
    align-items: flex-end;
    margin-bottom: 1rem;
}

.publications-topbar h2 {
    margin: 0 0 0.3rem;
    font-size: 1.7rem;
}

.publications-topbar p {
    margin: 0;
    color: #475569;
}

.year-chips {
    display: flex;
    flex-wrap: wrap;
    gap: 0.45rem;
}

.year-chips a {
    display: inline-flex;
    align-items: center;
    height: 1.9rem;
    padding: 0 0.75rem;
    border: 1px solid #cbd5e1;
    border-radius: 999px;
    background: #fff;
    color: #334155;
    font-size: 0.85rem;
}

.year-chips a:hover {
    border-color: var(--color-primary);
    color: var(--color-primary);
}

.publications-prose {
    background: #fff;
    border: 1px solid #e2e8f0;
    border-radius: 10px;
    padding: 1.15rem 1.2rem;
    margin-bottom: 1rem;
}

.publications-prose h1 {
    display: none;
}

.pubs-year {
    scroll-margin-top: 90px;
}

.pub {
    background: #fff;
}

.pub-title a {
    color: #1d4ed8;
}

.pub-actions .btn.btn-outline {
    border-width: 1px;
}

/* ============================================
   News 区域 - 新闻卡片
   =========================================== */

.news {
    padding: var(--spacing-4xl) 0;
    background: var(--color-bg-primary);
}

.news-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-2xl);
}

.news-item {
    background: var(--color-bg-primary);
    border-radius: var(--radius-lg);
    overflow: hidden;
    border: 1px solid var(--color-border);
    transition: all var(--transition-normal);
}

.news-item:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: transparent;
}

.news-image {
    width: 100%;
    height: 200px;
    background: linear-gradient(135deg, var(--color-bg-tertiary) 0%, var(--color-bg-secondary) 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-text-muted);
    font-size: 0.9rem;
}

.news-content {
    padding: var(--spacing-lg);
}

.news-date {
    font-size: 0.8rem;
    color: var(--color-text-muted);
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: var(--spacing-sm);
}

.news-item h3 {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--color-text-primary);
    margin-bottom: var(--spacing-sm);
    line-height: 1.4;
}

.news-item h3 a {
    color: var(--color-text-primary);
}

.news-item h3 a:hover {
    color: var(--color-primary-light);
}

.news-summary {
    font-size: 0.9rem;
    color: var(--color-text-secondary);
    line-height: 1.6;
    margin: 0;
}

/* ============================================
   CTA 区域
   =========================================== */

.cta {
    padding: var(--spacing-4xl) 0;
    background: linear-gradient(135deg, var(--color-primary) 0%, #1e3a5f 100%);
    color: var(--color-bg-primary);
    text-align: center;
    position: relative;
    overflow: hidden;
}

.cta::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        radial-gradient(circle at 30% 70%, rgba(37, 99, 235, 0.2) 0%, transparent 50%),
        radial-gradient(circle at 70% 30%, rgba(59, 130, 246, 0.15) 0%, transparent 50%);
    pointer-events: none;
}

.cta-content {
    position: relative;
    z-index: 1;
    max-width: 700px;
    margin: 0 auto;
}

.cta h2 {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--color-bg-primary);
    margin-bottom: var(--spacing-lg);
}

.cta p {
    font-size: 1.125rem;
    color: rgba(255, 255, 255, 0.85);
    margin-bottom: var(--spacing-2xl);
    line-height: 1.7;
}

.cta .btn {
    background: var(--color-bg-primary);
    color: var(--color-primary);
    font-weight: 600;
    padding: 1rem 2.5rem;
    font-size: 1rem;
}

.cta .btn:hover {
    background: rgba(255, 255, 255, 0.95);
    transform: translateY(-2px);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.2);
}

/* ============================================
   Footer 区域
   =========================================== */

.footer {
    background: var(--color-primary-dark);
    color: var(--color-bg-primary);
    padding: var(--spacing-3xl) 0 var(--spacing-xl);
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: var(--spacing-3xl);
    margin-bottom: var(--spacing-2xl);
}

.footer-brand h3 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-bg-primary);
    margin-bottom: var(--spacing-md);
}

.footer-brand p {
    color: rgba(255, 255, 255, 0.7);
    line-height: 1.7;
    margin-bottom: var(--spacing-lg);
}

.footer-contact {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.footer-contact-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    color: rgba(255, 255, 255, 0.7);
    font-size: 0.9rem;
}

.footer-links h4 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--color-bg-primary);
    margin-bottom: var(--spacing-lg);
}

.footer-links ul {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.footer-links a {
    color: rgba(255, 255, 255, 0.7);
    font-size: 0.9rem;
    transition: color var(--transition-fast);
}

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

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: var(--spacing-xl);
    text-align: center;
}

.footer-bottom p {
    color: rgba(255, 255, 255, 0.5);
    font-size: 0.85rem;
    margin: 0;
}

/* ============================================
   列表页样式
   =========================================== */

.list-page {
    padding: var(--spacing-3xl) 0;
    min-height: calc(100vh - 72px);
}

.list-page .section-header {
    text-align: left;
    margin-bottom: var(--spacing-2xl);
}

.list-page .section-header::after {
    margin: var(--spacing-lg) 0 0;
}

.news-hero {
    min-height: 220px;
    display: flex;
    align-items: flex-end;
    padding: 2.5rem 0;
    color: #fff;
    background: linear-gradient(rgba(15, 23, 42, 0.5), rgba(15, 23, 42, 0.5)),
                url("/images/news/news-hero.jpg") center/cover no-repeat,
                linear-gradient(135deg, #365b86 0%, #1f3d33 100%);
}

.news-hero h1 {
    color: #fff;
    font-size: 2.4rem;
    margin: 0;
}

.news-breadcrumb {
    background: #f0f2f5;
    border-top: 1px solid #e2e8f0;
    border-bottom: 1px solid #e2e8f0;
    font-size: 0.9rem;
}

.news-breadcrumb .container {
    padding-top: 0.75rem;
    padding-bottom: 0.75rem;
    display: flex;
    gap: 0.5rem;
    align-items: center;
    color: #64748b;
}

.news-breadcrumb a {
    color: #475569;
}

.news-page {
    background: #f5f6f8;
}

.news-intro {
    margin-bottom: 1.25rem;
}

.news-intro h1 {
    display: none;
}

.news-layout {
    display: grid;
    grid-template-columns: minmax(0, 2.2fr) minmax(220px, 1fr);
    gap: 2rem;
    align-items: start;
}

.news-list-item {
    background: #fff;
    border: 1px solid #e2e8f0;
    border-radius: 8px;
    padding: 1.25rem 1.25rem 1rem;
    margin-bottom: 1rem;
}

.news-list-item h2 {
    font-size: 1.35rem;
    margin-bottom: 0.6rem;
}

.news-list-item h2 a {
    color: #1e293b;
}

.news-list-item p {
    margin-bottom: 0.75rem;
}

.news-list-meta {
    display: flex;
    gap: 0.75rem;
    color: #64748b;
    font-size: 0.85rem;
}

.news-list-meta span + span::before {
    content: "•";
    margin-right: 0.75rem;
}

.news-sidebar {
    background: #fff;
    border: 1px solid #e2e8f0;
    border-radius: 8px;
    padding: 1.25rem;
    position: sticky;
    top: 90px;
}

.news-sidebar h3 {
    font-size: 1.5rem;
    margin-bottom: 0.75rem;
}

.news-sidebar ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

.news-sidebar li {
    color: #334155;
    font-size: 0.95rem;
    padding: 0.4rem 0;
}

.people-hero {
    min-height: 220px;
    display: flex;
    align-items: flex-end;
    padding: 2.5rem 0;
    color: #fff;
    background: linear-gradient(rgba(15, 23, 42, 0.45), rgba(15, 23, 42, 0.45)),
                url("/images/people/people-hero.jpg") center/cover no-repeat,
                linear-gradient(135deg, #294764 0%, #2d7b8e 100%);
}

.people-hero h1 {
    color: #fff;
    font-size: 2.4rem;
    margin: 0;
}

.people-breadcrumb {
    background: #f0f2f5;
    border-top: 1px solid #e2e8f0;
    border-bottom: 1px solid #e2e8f0;
    font-size: 0.9rem;
}

.people-breadcrumb .container {
    padding-top: 0.75rem;
    padding-bottom: 0.75rem;
    display: flex;
    gap: 0.5rem;
    align-items: center;
    color: #64748b;
}


.research-hero {
    min-height: 220px;
    display: flex;
    align-items: flex-end;
    padding: 2.5rem 0;
    color: #fff;
    background: linear-gradient(rgba(15, 23, 42, 0.45), rgba(15, 23, 42, 0.45)),
                linear-gradient(135deg, #2f4f73 0%, #1f3d33 100%);
}

.research-hero h1 {
    color: #fff;
    font-size: 2.4rem;
    margin: 0;
}

.research-breadcrumb {
    background: #f0f2f5;
    border-top: 1px solid #e2e8f0;
    border-bottom: 1px solid #e2e8f0;
    font-size: 0.9rem;
}

.research-breadcrumb .container {
    padding-top: 0.75rem;
    padding-bottom: 0.75rem;
    display: flex;
    gap: 0.5rem;
    align-items: center;
    color: #64748b;
}

.research-page {
    background: #f5f6f8;
}

.research-highlight-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 1rem;
    margin: 0 0 1.5rem;
}

.research-highlight-card {
    background: #fff;
    border: 1px solid #e2e8f0;
    border-radius: 10px;
    padding: 1.1rem 1.1rem 1rem;
}

.research-highlight-card h2 {
    font-size: 1.2rem;
    margin-bottom: 0.4rem;
}

.research-highlight-card p {
    margin-bottom: 0.7rem;
    color: #475569;
}

.research-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.45rem;
}

.research-prose {
    background: #fff;
    border: 1px solid #e2e8f0;
    border-radius: 10px;
    padding: 1.4rem;
    margin-bottom: 1.2rem;
}

.research-prose h1 {
    display: none;
}

.research-prose h2 {
    font-size: 1.75rem;
    margin-top: 1.1rem;
    margin-bottom: 0.45rem;
    color: #0f172a;
}

.research-prose p {
    color: #475569;
}

.research-prose ul {
    margin: 0.5rem 0 1rem 1.25rem;
}

.research-prose li {
    margin-bottom: 0.35rem;
}

.join-hero {
    min-height: 220px;
    display: flex;
    align-items: flex-end;
    padding: 2.5rem 0;
    color: #fff;
    background: linear-gradient(rgba(15, 23, 42, 0.45), rgba(15, 23, 42, 0.45)),
                linear-gradient(135deg, #244a73 0%, #1f3d33 100%);
}

.join-hero h1 {
    color: #fff;
    font-size: 2.4rem;
    margin: 0;
}

.contact-hero {
    min-height: 220px;
    display: flex;
    align-items: flex-end;
    padding: 2.5rem 0;
    color: #fff;
    background:
        radial-gradient(ellipse 80% 60% at 20% 40%, rgba(59, 147, 168, 0.25) 0%, transparent 55%),
        linear-gradient(135deg, #1a2f24 0%, #1f3d33 35%, #2f4f73 100%);
}

.contact-hero h1 {
    color: #fff;
    font-size: 2.4rem;
    margin: 0;
}

.join-breadcrumb,
.contact-breadcrumb {
    background: #f0f2f5;
    border-top: 1px solid #e2e8f0;
    border-bottom: 1px solid #e2e8f0;
    font-size: 0.9rem;
}

.join-breadcrumb .container,
.contact-breadcrumb .container {
    padding-top: 0.75rem;
    padding-bottom: 0.75rem;
    display: flex;
    gap: 0.5rem;
    align-items: center;
    color: #64748b;
}

.join-page,
.contact-page {
    background: #f5f6f8;
}

.memorial-page-inner {
    max-width: 1120px;
    margin: 0 auto;
}

.memorial-detail-inner {
    max-width: 1120px;
    margin: 0 auto;
}

.memorial-intro {
    background: #fff;
    border: 1px solid #e2e8f0;
    border-radius: 10px;
    padding: 1.15rem 1.2rem;
    margin-bottom: 1rem;
}

.memorial-intro h1 {
    display: none;
}

.memorial-intro p {
    color: #475569;
    margin-bottom: 0.5rem;
}

.memorial-section {
    margin-bottom: 1.25rem;
}

.memorial-section-head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 0.75rem;
}

.memorial-section-head h2 {
    margin: 0;
    font-size: 1.5rem;
    color: #0f766e;
}

.memorial-more {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 32px;
    padding: 0.2rem 0.75rem;
    border: 1px solid #cbd5e1;
    border-radius: 8px;
    font-size: 0.82rem;
    color: #334155;
    background: #f8fafc;
}

.memorial-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 1rem;
}

.memorial-card {
    background: #fff;
    border: 1px solid #e2e8f0;
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 1px 3px rgba(15, 23, 42, 0.06);
}

.memorial-photo-wrap {
    position: relative;
    aspect-ratio: 16 / 10;
    overflow: hidden;
    background: #cbd5e1;
}

.memorial-photo {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

.memorial-date {
    position: absolute;
    left: 0.65rem;
    bottom: 0.65rem;
    padding: 0.2rem 0.55rem;
    border-radius: 20px;
    background: rgba(248, 250, 252, 0.92);
    color: #334155;
    font-size: 0.8rem;
}

.memorial-info {
    padding: 0.8rem 0.9rem 0.95rem;
}

.memorial-info h3 {
    font-size: 1.05rem;
    margin: 0 0 0.25rem;
    color: #0f172a;
}

.memorial-info p {
    margin: 0;
    color: #475569;
    font-size: 0.92rem;
}

.memorial-detail-list {
    display: grid;
    gap: 1rem;
}

.memorial-detail-card {
    display: grid;
    grid-template-columns: 220px 1fr;
    gap: 1rem;
    background: #fff;
    border: 1px solid #e2e8f0;
    border-radius: 10px;
    padding: 1rem;
}

.memorial-detail-thumb {
    border-radius: 8px;
    overflow: hidden;
    background: #cbd5e1;
    min-height: 130px;
}

.memorial-detail-thumb img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

.memorial-detail-body h2 {
    margin: 0 0 0.35rem;
    font-size: 1.7rem;
    color: #134e4a;
}

.memorial-detail-body p {
    margin: 0 0 0.65rem;
    color: #475569;
}

.memorial-detail-date {
    font-size: 0.88rem;
    color: #64748b;
}

.join-layout {
    display: grid;
    grid-template-columns: minmax(0, 2fr) minmax(260px, 1fr);
    gap: 1.1rem;
    align-items: start;
}

.contact-page-inner {
    max-width: 1040px;
    margin: 0 auto;
}

.contact-intro {
    text-align: center;
    padding: 1.25rem 0.5rem 1.5rem;
    border-bottom: 1px solid #e2e8f0;
    margin-bottom: 1.25rem;
}

.contact-intro-lead {
    font-size: 1.15rem;
    font-weight: 600;
    color: #0f172a;
    margin: 0 0 0.5rem;
    line-height: 1.5;
}

.contact-intro-sub {
    margin: 0 0 0.3rem;
    color: #475569;
    font-size: 1rem;
}

.contact-intro-sub a {
    color: #1d4ed8;
    font-weight: 500;
}

.contact-intro-note {
    margin: 0;
    font-size: 0.9rem;
    color: #64748b;
}

.contact-top-row {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 1rem;
    margin-bottom: 1.25rem;
    align-items: stretch;
}

.contact-block {
    background: #fff;
    border: 1px solid #e2e8f0;
    border-radius: 10px;
    padding: 1.15rem 1.1rem;
    height: 100%;
    display: flex;
    flex-direction: column;
}

.contact-block h2 {
    font-size: 1.1rem;
    margin: 0 0 0.6rem;
    color: #0f172a;
}

.contact-block p {
    margin: 0 0 0.45rem;
    color: #475569;
    font-size: 0.95rem;
    line-height: 1.55;
}

.contact-block p:last-child {
    margin-bottom: 0;
}

.contact-block-meta {
    font-size: 0.88rem !important;
    color: #64748b !important;
}

.contact-block-icon {
    width: 44px;
    height: 44px;
    border-radius: 10px;
    background: rgba(59, 147, 168, 0.12);
    color: #2d7b8e;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 0.65rem;
}

.contact-map-section {
    width: 100%;
    margin-bottom: 0.5rem;
}

.contact-map-card {
    background: #fff;
    border: 1px solid #e2e8f0;
    border-radius: 10px;
    padding: 1.15rem 1.15rem 1rem;
    box-shadow: 0 1px 3px rgba(15, 23, 42, 0.06);
}

.contact-map-heading {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 0.85rem;
}

.contact-map-heading .contact-block-icon {
    margin-bottom: 0;
    flex-shrink: 0;
}

.contact-map-heading h2 {
    margin: 0;
    font-size: 1.1rem;
    color: #0f172a;
}

.contact-map-section .contact-map-frame {
    position: relative;
    width: 100%;
    min-height: 280px;
    aspect-ratio: 21 / 9;
    max-height: 420px;
    border-radius: 8px;
    overflow: hidden;
    border: 1px solid #e2e8f0;
    background: #e8eef5;
}

.contact-map-section iframe {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    border: 0;
}

@supports not (aspect-ratio: 1) {
    .contact-map-section .contact-map-frame {
        height: 0;
        padding-bottom: 42.85%;
    }
}

.contact-map-fallback {
    margin: 0.25rem 0 0 !important;
}

.contact-map-open-external {
    margin: 0.5rem 0 0 !important;
    font-size: 0.85rem;
    text-align: center;
}

.contact-map-open-external a {
    color: #64748b;
}

.contact-map-open-external a:hover {
    color: #1d4ed8;
}

.contact-site-link {
    text-align: center;
    font-size: 0.95rem;
    color: #475569;
    margin: 1rem 0 1rem;
}

.contact-site-link a {
    color: #1d4ed8;
}

.contact-prose-detail {
    margin-top: 0.75rem;
}

.contact-prose-detail h2:first-child {
    margin-top: 0;
}

.join-prose,
.contact-prose {
    background: #fff;
    border: 1px solid #e2e8f0;
    border-radius: 10px;
    padding: 1.25rem;
}

.join-prose h1,
.contact-prose h1 {
    display: none;
}

.join-program-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 0.9rem;
    margin-bottom: 0.9rem;
}

.join-program-card {
    background: #fff;
    border: 1px solid #dbe4ee;
    border-radius: 10px;
    padding: 1rem;
}

.join-program-card h3 {
    margin-bottom: 0.35rem;
    font-size: 1.15rem;
}

.join-program-card p {
    margin: 0;
    color: #475569;
    font-size: 0.95rem;
}

.join-cta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 0.8rem;
    background: #ffffff;
    border: 1px solid #dbe4ee;
    border-left: 4px solid #1d4ed8;
    border-radius: 10px;
    padding: 0.85rem 1rem;
    margin-bottom: 0.9rem;
}

.join-cta p {
    margin: 0;
    color: #334155;
}

.join-prose h2,
.contact-prose h2 {
    font-size: 1.65rem;
    margin-top: 1rem;
    margin-bottom: 0.45rem;
}

.join-prose h3,
.contact-prose h3 {
    margin-top: 0.75rem;
}

.join-prose ul,
.join-prose ol {
    margin: 0.4rem 0 1rem 1.25rem;
}

.join-prose li {
    margin-bottom: 0.28rem;
    color: #334155;
}

.join-side {
    display: grid;
    gap: 0.9rem;
    position: sticky;
    top: 88px;
}

.info-card {
    background: #fff;
    border: 1px solid #e2e8f0;
    border-radius: 10px;
    padding: 1rem 1rem 0.9rem;
}

.info-card h3 {
    margin-bottom: 0.5rem;
}

.info-card p,
.info-card li {
    color: #475569;
    font-size: 0.95rem;
}

.info-card ol {
    margin: 0 0 0 1.15rem;
}

.info-card-note {
    border-left: 4px solid #1d4ed8;
}

.people-page {
    background: #f5f6f8;
}

.people-intro h1 {
    display: none;
}

.people-intro {
    max-width: 900px;
    margin: 0 auto 1.5rem;
    text-align: center;
}

.people-intro p {
    margin-left: auto;
    margin-right: auto;
}

.people-section {
    margin: 2rem 0 2.5rem;
}

.people-section h2 {
    margin-bottom: 1rem;
}

.advisor-card {
    display: grid;
    grid-template-columns: 360px 1fr;
    background: #fff;
    border: 1px solid #e2e8f0;
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 1px 3px rgba(15, 23, 42, 0.06);
}

.advisor-photo-wrap {
    background: #eef2f7;
}

.advisor-photo,
.advisor-photo.placeholder-photo {
    width: 100%;
    height: 100%;
    min-height: 320px;
    object-fit: cover;
    display: flex;
    justify-content: center;
    align-items: center;
    color: #64748b;
}

.advisor-info {
    padding: 1.5rem;
    background: #fff;
    color: #1e293b;
}

.advisor-info h3,
.advisor-info p,
.advisor-info .advisor-position {
    color: inherit;
}

.advisor-position {
    opacity: 1;
    color: #0f172a;
    font-weight: 600;
    margin-bottom: 0.75rem;
}

.member-photo-img {
    width: 100%;
    height: 220px;
    object-fit: cover;
    display: block;
}

.members-grid.members-grid--students {
    grid-template-columns: repeat(4, minmax(0, 1fr));
}

.members-grid.members-grid--alumni {
    grid-template-columns: repeat(4, minmax(0, 1fr));
}

.members-grid--alumni .member-photo-img,
.members-grid--alumni .member-photo {
    height: 200px;
}

.list-content {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.list-item {
    padding: var(--spacing-xl);
    background: var(--color-bg-primary);
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-border);
    transition: all var(--transition-normal);
}

.list-item:hover {
    box-shadow: var(--shadow-md);
    border-color: var(--color-primary-light);
}

.list-item h2 {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--color-text-primary);
    margin-bottom: var(--spacing-sm);
}

.list-item h2 a {
    color: var(--color-text-primary);
}

.list-item h2 a:hover {
    color: var(--color-primary-light);
}

.list-item-meta {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    font-size: 0.85rem;
    color: var(--color-text-muted);
    margin-bottom: var(--spacing-sm);
}

.list-item-summary {
    font-size: 0.95rem;
    color: var(--color-text-secondary);
    line-height: 1.6;
    margin: 0;
}

/* ============================================
   详情页样式
   =========================================== */

.single-page {
    padding: var(--spacing-3xl) 0;
    min-height: calc(100vh - 72px);
}

.single-header {
    margin-bottom: var(--spacing-2xl);
    padding-bottom: var(--spacing-xl);
    border-bottom: 1px solid var(--color-border);
}

.single-header h1 {
    font-size: 2rem;
    font-weight: 700;
    color: var(--color-text-primary);
    margin-bottom: var(--spacing-md);
    line-height: 1.3;
}

.single-meta {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    font-size: 0.9rem;
    color: var(--color-text-muted);
}

.single-content {
    max-width: 800px;
    line-height: 1.8;
}

.single-content h2 {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--color-text-primary);
    margin-top: var(--spacing-2xl);
    margin-bottom: var(--spacing-md);
    padding-bottom: var(--spacing-sm);
    border-bottom: 2px solid var(--color-border);
}

.single-content h3 {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--color-text-primary);
    margin-top: var(--spacing-xl);
    margin-bottom: var(--spacing-md);
}

.single-content p {
    margin-bottom: var(--spacing-md);
    color: var(--color-text-secondary);
}

.single-content ul, .single-content ol {
    margin-bottom: var(--spacing-md);
    padding-left: var(--spacing-xl);
}

.single-content li {
    margin-bottom: var(--spacing-sm);
    color: var(--color-text-secondary);
}

.single-content strong {
    color: var(--color-text-primary);
    font-weight: 600;
}

/* ============================================
   成员页特殊样式
   =========================================== */

.member-featured {
    display: grid;
    grid-template-columns: 300px 1fr;
    gap: var(--spacing-3xl);
    margin-bottom: var(--spacing-3xl);
    padding: var(--spacing-2xl);
    background: var(--color-bg-primary);
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-border);
    box-shadow: var(--shadow-sm);
}

.member-featured-photo {
    width: 100%;
    height: 350px;
    background: linear-gradient(135deg, var(--color-bg-tertiary) 0%, var(--color-bg-secondary) 100%);
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-text-muted);
    font-size: 0.9rem;
}

.member-featured-info h2 {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--color-text-primary);
    margin-bottom: var(--spacing-xs);
}

.member-featured-info .member-role {
    font-size: 0.9rem;
    color: var(--color-primary);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: var(--spacing-lg);
}

.member-featured-info .member-bio {
    font-size: 1rem;
    line-height: 1.8;
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-lg);
}

.member-featured-info .member-research-areas {
    font-size: 0.95rem;
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-lg);
}

.member-featured-info .member-research-areas strong {
    color: var(--color-text-primary);
}

.member-featured-info .member-contact {
    display: flex;
    gap: var(--spacing-md);
}

.member-featured-info .member-contact a {
    display: inline-flex;
    align-items: center;
    padding: 0.5rem 1rem;
    background: var(--color-bg-tertiary);
    border-radius: var(--radius-md);
    font-size: 0.9rem;
    color: var(--color-text-primary);
    transition: all var(--transition-fast);
}

.member-featured-info .member-contact a:hover {
    background: var(--color-primary);
    color: var(--color-bg-primary);
}

.members-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: var(--spacing-xl);
}

.member-card {
    background: var(--color-bg-primary);
    border-radius: var(--radius-lg);
    overflow: hidden;
    border: 1px solid var(--color-border);
    transition: all var(--transition-normal);
}

.member-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: transparent;
}

.member-photo {
    width: 100%;
    height: 280px;
    background: linear-gradient(135deg, var(--color-bg-tertiary) 0%, var(--color-bg-secondary) 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-text-muted);
    font-size: 0.9rem;
}

.member-info {
    padding: var(--spacing-lg);
}

.member-name {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--color-text-primary);
    margin-bottom: var(--spacing-xs);
}

.member-role {
    font-size: 0.85rem;
    color: var(--color-primary);
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: var(--spacing-sm);
}

.member-research {
    font-size: 0.9rem;
    color: var(--color-text-secondary);
    line-height: 1.5;
    margin-bottom: var(--spacing-md);
}

.member-contact {
    display: flex;
    gap: var(--spacing-sm);
}

.member-contact a {
    font-size: 0.85rem;
    color: var(--color-text-muted);
    transition: color var(--transition-fast);
}

.member-contact a:hover {
    color: var(--color-primary-light);
}

/* ============================================
   响应式优化
   =========================================== */

@media (max-width: 1024px) {
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .research-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .news-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .cards-grid,
    .cards-grid--wide {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .footer-content {
        grid-template-columns: 1fr 1fr;
    }

    .members-grid.members-grid--students,
    .members-grid.members-grid--alumni {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
}

@media (max-width: 768px) {
    :root {
        --spacing-4xl: 4rem;
        --spacing-3xl: 3rem;
    }
    
    .container {
        padding: 0 var(--spacing-md);
    }
    
    .header-content {
        height: 64px;
    }
    
    .nav-menu {
        display: none;
    }
    
    .hero {
        min-height: 70vh;
        padding: var(--spacing-2xl) 0;
    }
    
    .hero-content h1 {
        font-size: 2.25rem;
    }
    
    .hero-content p {
        font-size: 1rem;
    }
    
    .section-header h2 {
        font-size: 1.75rem;
    }
    
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--spacing-md);
    }
    
    .stats-item {
        padding: var(--spacing-lg);
    }
    
    .stats-item h3 {
        font-size: 2rem;
    }
    
    .research-grid {
        grid-template-columns: 1fr;
    }
    
    .news-grid {
        grid-template-columns: 1fr;
    }

    .cards-grid,
    .cards-grid--wide {
        grid-template-columns: 1fr;
    }
    
    .publication-item {
        padding: var(--spacing-md);
    }
    
    .cta h2 {
        font-size: 1.75rem;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        gap: var(--spacing-xl);
    }
    
    .members-grid,
    .members-grid.members-grid--students,
    .members-grid.members-grid--alumni {
        grid-template-columns: 1fr;
    }
    
    .member-featured {
        grid-template-columns: 1fr;
        gap: var(--spacing-xl);
    }
    
    .member-featured-photo {
        height: 250px;
    }

    .publications-topbar {
        flex-direction: column;
        align-items: flex-start;
    }

    .pub {
        grid-template-columns: 1fr;
    }

    .pub-actions {
        justify-content: flex-start;
    }

    .news-layout {
        grid-template-columns: 1fr;
    }

    .news-sidebar {
        position: static;
    }

    .advisor-card {
        grid-template-columns: 1fr;
    }

    .advisor-photo,
    .advisor-photo.placeholder-photo {
        min-height: 260px;
    }

    .research-highlight-grid {
        grid-template-columns: 1fr;
    }

    .memorial-grid {
        grid-template-columns: 1fr;
    }

    .memorial-detail-card {
        grid-template-columns: 1fr;
    }

    .join-layout {
        grid-template-columns: 1fr;
    }

    .join-program-grid {
        grid-template-columns: 1fr;
    }

    .join-side {
        position: static;
    }

    .contact-top-row {
        grid-template-columns: 1fr;
    }

    .contact-map-section .contact-map-frame {
        min-height: 240px;
        aspect-ratio: 4 / 3;
        max-height: none;
    }
}

@media (max-width: 480px) {
    .hero-content h1 {
        font-size: 1.875rem;
    }
    
    .stats-grid {
        grid-template-columns: 1fr;
    }
    
    .section-header h2 {
        font-size: 1.5rem;
    }
    
    .btn {
        width: 100%;
        text-align: center;
    }
}

/* ============================================
   动画效果
   =========================================== */

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.animate-fadeInUp {
    animation: fadeInUp 0.6s ease-out;
}

/* 平滑过渡 */
* {
    transition-property: color, background-color, border-color, box-shadow, transform;
    transition-timing-function: cubic-bezier(0.4, 0, 0.2, 1);
    transition-duration: 150ms;
}