/* ========================================
   职业教育研究网站 - 科技感未来风格样式表
   融合赛博朋克与线性美学设计
   ======================================== */

/* CSS变量定义 */
:root {
    /* 主色调 - 赛博朋克霓虹色 */
    --primary-neon: #00ff88;
    --secondary-neon: #00d4ff;
    --accent-neon: #ff00ff;
    --tertiary-neon: #7c3aed;
    
    /* 背景色系 */
    --bg-deep: #030308;
    --bg-primary: #0a0a0f;
    --bg-secondary: #12121a;
    --bg-card: #16161f;
    --bg-elevated: #1c1c2e;
    
    /* 文字色系 */
    --text-primary: #e8e8ed;
    --text-secondary: #a1a1aa;
    --text-muted: #6b7280;
    
    /* 边框与分割线 */
    --border-subtle: rgba(255, 255, 255, 0.06);
    --border-light: rgba(255, 255, 255, 0.1);
    --border-glow: rgba(0, 255, 136, 0.3);
    
    /* 渐变 */
    --gradient-primary: linear-gradient(135deg, #00ff88 0%, #00d4ff 100%);
    --gradient-secondary: linear-gradient(135deg, #00d4ff 0%, #7c3aed 100%);
    --gradient-accent: linear-gradient(135deg, #ff00ff 0%, #7c3aed 100%);
    --gradient-dark: linear-gradient(180deg, rgba(10, 10, 15, 0) 0%, rgba(10, 10, 15, 1) 100%);
    
    /* 阴影 */
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.5);
    --shadow-glow: 0 0 20px rgba(0, 255, 136, 0.3);
    --shadow-glow-lg: 0 0 40px rgba(0, 255, 136, 0.4);
    
    /* 字体 */
    --font-display: 'Orbitron', 'Noto Sans SC', sans-serif;
    --font-body: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, sans-serif;
    
    /* 间距 */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    --spacing-3xl: 4rem;
    
    /* 圆角 */
    --radius-sm: 6px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --radius-full: 9999px;
    
    /* 过渡 */
    --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-base: 250ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 400ms cubic-bezier(0.4, 0, 0.2, 1);
}

/* 全局重置 */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: var(--font-body);
    background: var(--bg-deep);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* 选择文本样式 */
::selection {
    background: rgba(0, 255, 136, 0.3);
    color: var(--text-primary);
}

/* 滚动条样式 */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: var(--bg-primary);
}

::-webkit-scrollbar-thumb {
    background: var(--bg-elevated);
    border-radius: var(--radius-full);
    border: 2px solid var(--bg-primary);
}

::-webkit-scrollbar-thumb:hover {
    background: var(--text-muted);
}

/* ========================================
   背景粒子效果
   ======================================== */
.particles {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 0;
    overflow: hidden;
}

.particle {
    position: absolute;
    width: 2px;
    height: 2px;
    background: var(--primary-neon);
    border-radius: 50%;
    opacity: 0.3;
    animation: float 20s infinite ease-in-out;
}

@keyframes float {
    0%, 100% {
        transform: translateY(0) translateX(0);
        opacity: 0.3;
    }
    25% {
        transform: translateY(-100px) translateX(50px);
        opacity: 0.6;
    }
    50% {
        transform: translateY(-200px) translateX(-30px);
        opacity: 0.3;
    }
    75% {
        transform: translateY(-100px) translateX(-50px);
        opacity: 0.6;
    }
}

/* ========================================
   玻璃态效果
   ======================================== */
.glass-effect {
    background: rgba(22, 22, 31, 0.6);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--border-subtle);
}

/* ========================================
   导航栏
   ======================================== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: var(--spacing-md) 0;
    transition: all var(--transition-base);
}

.navbar.scrolled {
    background: rgba(10, 10, 15, 0.95);
    border-bottom: 1px solid var(--border-subtle);
}

.nav-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 var(--spacing-xl);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--spacing-xl);
}

.logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    text-decoration: none;
}

.logo-icon {
    width: 40px;
    height: 40px;
    position: relative;
}

.logo-icon svg {
    width: 100%;
    height: 100%;
    filter: drop-shadow(0 0 8px rgba(0, 255, 136, 0.5));
}

.logo-text {
    font-family: var(--font-display);
    font-size: 1.25rem;
    font-weight: 700;
    letter-spacing: 0.05em;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

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

.nav-link {
    position: relative;
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 500;
    padding: var(--spacing-sm) var(--spacing-md);
    transition: all var(--transition-fast);
    letter-spacing: 0.02em;
}

.nav-link::before {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 0;
    height: 2px;
    background: var(--gradient-primary);
    transition: width var(--transition-base);
    border-radius: var(--radius-full);
}

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

.nav-link:hover::before,
.nav-link.active::before {
    width: 100%;
}

.nav-link.active {
    text-shadow: 0 0 10px rgba(0, 255, 136, 0.5);
}

/* CTA按钮 */
.cta-button {
    position: relative;
    padding: var(--spacing-sm) var(--spacing-lg);
    background: transparent;
    border: 1px solid var(--primary-neon);
    border-radius: var(--radius-md);
    color: var(--primary-neon);
    font-family: var(--font-body);
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    overflow: hidden;
    transition: all var(--transition-base);
}

.cta-button:hover {
    background: rgba(0, 255, 136, 0.1);
    box-shadow: var(--shadow-glow);
    transform: translateY(-2px);
}

.cta-button span {
    position: relative;
    z-index: 1;
}

/* ========================================
   Hero Section
   ======================================== */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding: 120px var(--spacing-xl) var(--spacing-3xl);
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        radial-gradient(ellipse 80% 50% at 50% -20%, rgba(0, 255, 136, 0.15) 0%, transparent 50%),
        radial-gradient(ellipse 60% 40% at 80% 60%, rgba(0, 212, 255, 0.1) 0%, transparent 50%),
        radial-gradient(ellipse 50% 30% at 20% 80%, rgba(124, 58, 237, 0.1) 0%, transparent 50%);
    pointer-events: none;
    z-index: 0;
}

.hero-content {
    flex: 1;
    max-width: 700px;
    z-index: 1;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-full);
    margin-bottom: var(--spacing-xl);
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.badge-dot {
    width: 8px;
    height: 8px;
    background: var(--primary-neon);
    border-radius: 50%;
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% {
        opacity: 1;
        transform: scale(1);
    }
    50% {
        opacity: 0.5;
        transform: scale(1.2);
    }
}

.hero-title {
    font-family: var(--font-display);
    font-size: clamp(2.5rem, 5vw, 4rem);
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: var(--spacing-xl);
    letter-spacing: -0.02em;
}

.title-line {
    display: block;
}

.gradient-text {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    position: relative;
}

.gradient-text::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 100%;
    height: 3px;
    background: var(--gradient-primary);
    border-radius: var(--radius-full);
    opacity: 0.5;
}

.hero-description {
    font-size: 1.125rem;
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: var(--spacing-2xl);
}

.hero-buttons {
    display: flex;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-3xl);
}

.primary-button {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md) var(--spacing-xl);
    background: var(--gradient-primary);
    border: none;
    border-radius: var(--radius-md);
    color: var(--bg-deep);
    font-family: var(--font-body);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
}

.primary-button::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.3), transparent);
    transition: left 0.5s;
}

.primary-button:hover::before {
    left: 100%;
}

.primary-button:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-glow-lg);
}

.primary-button svg {
    transition: transform var(--transition-fast);
}

.primary-button:hover svg {
    transform: translateX(4px);
}

.secondary-button {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md) var(--spacing-xl);
    background: transparent;
    border: 1px solid var(--border-light);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-family: var(--font-body);
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-base);
}

.secondary-button:hover {
    background: rgba(255, 255, 255, 0.05);
    border-color: var(--text-secondary);
}

/* Hero Stats */
.hero-stats {
    display: flex;
    align-items: center;
    gap: var(--spacing-2xl);
}

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

.stat-number {
    font-family: var(--font-display);
    font-size: 2.5rem;
    font-weight: 700;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1;
    margin-bottom: var(--spacing-xs);
}

.stat-label {
    font-size: 0.9rem;
    color: var(--text-muted);
}

.stat-divider {
    width: 1px;
    height: 40px;
    background: var(--border-light);
}

/* Hero Visual */
.hero-visual {
    flex: 1;
    display: flex;
    justify-content: center;
    align-items: center;
    position: relative;
    z-index: 1;
}

.visual-container {
    position: relative;
    width: 500px;
    height: 500px;
}

/* 轨道环 */
.orbit-ring {
    position: absolute;
    border: 1px solid var(--border-light);
    border-radius: 50%;
    animation: orbit-rotate 20s linear infinite;
}

.ring-1 {
    width: 300px;
    height: 300px;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    border-color: rgba(0, 255, 136, 0.2);
}

.ring-2 {
    width: 400px;
    height: 400px;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    border-color: rgba(0, 212, 255, 0.15);
    animation-duration: 30s;
    animation-direction: reverse;
}

.ring-3 {
    width: 480px;
    height: 480px;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    border-color: rgba(124, 58, 237, 0.1);
    animation-duration: 40s;
}

@keyframes orbit-rotate {
    from {
        transform: translate(-50%, -50%) rotate(0deg);
    }
    to {
        transform: translate(-50%, -50%) rotate(360deg);
    }
}

/* 核心球体 */
.core-sphere {
    position: absolute;
    width: 120px;
    height: 120px;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background: radial-gradient(circle at 30% 30%, rgba(0, 255, 136, 0.3), transparent 60%);
    border-radius: 50%;
    box-shadow: 
        0 0 60px rgba(0, 255, 136, 0.3),
        inset 0 0 40px rgba(0, 212, 255, 0.2);
    animation: sphere-pulse 4s ease-in-out infinite;
}

.sphere-inner {
    position: absolute;
    width: 80px;
    height: 80px;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background: var(--gradient-primary);
    border-radius: 50%;
    opacity: 0.8;
    filter: blur(20px);
}

@keyframes sphere-pulse {
    0%, 100% {
        transform: translate(-50%, -50%) scale(1);
        box-shadow: 
            0 0 60px rgba(0, 255, 136, 0.3),
            inset 0 0 40px rgba(0, 212, 255, 0.2);
    }
    50% {
        transform: translate(-50%, -50%) scale(1.1);
        box-shadow: 
            0 0 80px rgba(0, 255, 136, 0.4),
            inset 0 0 50px rgba(0, 212, 255, 0.3);
    }
}

/* 浮动卡片 */
.floating-card {
    position: absolute;
    padding: var(--spacing-md) var(--spacing-lg);
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    animation: float-card 6s ease-in-out infinite;
    box-shadow: var(--shadow-md);
}

.card-1 {
    top: 15%;
    right: 10%;
    animation-delay: 0s;
}

.card-2 {
    bottom: 25%;
    left: 5%;
    animation-delay: 2s;
}

.card-3 {
    bottom: 10%;
    right: 15%;
    animation-delay: 4s;
}

@keyframes float-card {
    0%, 100% {
        transform: translateY(0);
    }
    50% {
        transform: translateY(-20px);
    }
}

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

.card-text {
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-primary);
}

/* ========================================
   通用Section样式
   ======================================== */
.section-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 var(--spacing-xl);
}

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

.section-badge {
    display: inline-block;
    padding: var(--spacing-sm) var(--spacing-lg);
    border-radius: var(--radius-full);
    margin-bottom: var(--spacing-lg);
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--primary-neon);
    letter-spacing: 0.05em;
}

.section-title {
    font-family: var(--font-display);
    font-size: clamp(2rem, 4vw, 3rem);
    font-weight: 700;
    margin-bottom: var(--spacing-md);
    letter-spacing: -0.02em;
}

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

/* ========================================
   研究方向 Section
   ======================================== */
.research-section {
    padding: var(--spacing-3xl) 0;
    position: relative;
}

.research-section::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 800px;
    height: 800px;
    background: radial-gradient(circle, rgba(0, 255, 136, 0.05) 0%, transparent 70%);
    pointer-events: none;
}

.research-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: var(--spacing-xl);
}

.research-card {
    position: relative;
    padding: var(--spacing-2xl);
    border-radius: var(--radius-xl);
    transition: all var(--transition-base);
    overflow: hidden;
}

.research-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--gradient-primary);
    opacity: 0;
    transition: opacity var(--transition-base);
}

.research-card:hover {
    transform: translateY(-8px);
    border-color: var(--border-glow);
    box-shadow: var(--shadow-glow);
}

.research-card:hover::before {
    opacity: 1;
}

.card-glow {
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(0, 255, 136, 0.1) 0%, transparent 50%);
    opacity: 0;
    transition: opacity var(--transition-slow);
    pointer-events: none;
}

.research-card:hover .card-glow {
    opacity: 1;
}

.card-icon-wrapper {
    position: relative;
    width: 60px;
    height: 60px;
    margin-bottom: var(--spacing-lg);
}

.icon-bg {
    position: absolute;
    width: 100%;
    height: 100%;
    background: var(--gradient-primary);
    border-radius: var(--radius-md);
    opacity: 0.1;
}

.card-icon {
    position: relative;
    width: 100%;
    height: 100%;
    color: var(--primary-neon);
    padding: 12px;
}

.card-title {
    font-family: var(--font-display);
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: var(--spacing-md);
    color: var(--text-primary);
}

.card-description {
    font-size: 0.95rem;
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: var(--spacing-lg);
}

.card-tags {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
}

.tag {
    padding: var(--spacing-xs) var(--spacing-md);
    background: rgba(0, 255, 136, 0.1);
    border: 1px solid rgba(0, 255, 136, 0.2);
    border-radius: var(--radius-full);
    font-size: 0.8rem;
    color: var(--primary-neon);
}

/* ========================================
   研究项目 Section
   ======================================== */
.projects-section {
    padding: var(--spacing-3xl) 0;
    background: linear-gradient(180deg, transparent 0%, rgba(0, 212, 255, 0.02) 50%, transparent 100%);
}

.projects-showcase {
    display: grid;
    grid-template-columns: 1.5fr 1fr;
    gap: var(--spacing-xl);
}

.project-main {
    position: relative;
    border-radius: var(--radius-xl);
    overflow: hidden;
    transition: all var(--transition-base);
}

.project-main:hover {
    box-shadow: var(--shadow-glow);
}

.project-image {
    position: relative;
    height: 300px;
    overflow: hidden;
}

.image-placeholder {
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, var(--bg-secondary) 0%, var(--bg-elevated) 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
}

.placeholder-grid {
    position: absolute;
    width: 100%;
    height: 100%;
    background-image: 
        linear-gradient(rgba(0, 255, 136, 0.05) 1px, transparent 1px),
        linear-gradient(90deg, rgba(0, 255, 136, 0.05) 1px, transparent 1px);
    background-size: 30px 30px;
    animation: grid-move 20s linear infinite;
}

@keyframes grid-move {
    0% {
        transform: translate(0, 0);
    }
    100% {
        transform: translate(30px, 30px);
    }
}

.placeholder-icon {
    font-size: 4rem;
    z-index: 1;
}

.project-overlay {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 50%;
    background: linear-gradient(to top, var(--bg-card) 0%, transparent 100%);
}

.project-content {
    padding: var(--spacing-2xl);
}

.project-status {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-xs) var(--spacing-md);
    background: rgba(0, 255, 136, 0.1);
    border-radius: var(--radius-full);
    font-size: 0.85rem;
    color: var(--primary-neon);
    margin-bottom: var(--spacing-lg);
}

.status-dot {
    width: 8px;
    height: 8px;
    background: var(--primary-neon);
    border-radius: 50%;
    animation: pulse 2s infinite;
}

.project-title {
    font-family: var(--font-display);
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: var(--spacing-md);
    line-height: 1.3;
}

.project-description {
    font-size: 0.95rem;
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: var(--spacing-xl);
}

.project-meta {
    display: flex;
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
}

.meta-item {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.meta-label {
    font-size: 0.8rem;
    color: var(--text-muted);
}

.meta-value {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
}

.project-progress {
    margin-top: var(--spacing-lg);
}

.progress-header {
    display: flex;
    justify-content: space-between;
    margin-bottom: var(--spacing-sm);
    font-size: 0.9rem;
}

.progress-value {
    color: var(--primary-neon);
    font-weight: 600;
}

.progress-bar {
    height: 6px;
    background: var(--bg-elevated);
    border-radius: var(--radius-full);
    overflow: hidden;
}

.progress-fill {
    height: 100%;
    background: var(--gradient-primary);
    border-radius: var(--radius-full);
    transition: width 1s ease-out;
    position: relative;
}

.progress-fill::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.3), transparent);
    animation: shimmer 2s infinite;
}

@keyframes shimmer {
    0% {
        transform: translateX(-100%);
    }
    100% {
        transform: translateX(100%);
    }
}

/* 项目列表 */
.projects-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.project-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    transition: all var(--transition-base);
    cursor: pointer;
}

.project-item:hover {
    transform: translateX(8px);
    border-color: var(--border-glow);
    box-shadow: var(--shadow-glow);
}

.item-icon {
    font-size: 2rem;
    width: 50px;
    height: 50px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(0, 255, 136, 0.1);
    border-radius: var(--radius-md);
}

.item-content {
    flex: 1;
}

.item-content h4 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
    line-height: 1.3;
}

.item-meta {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    font-size: 0.85rem;
}

.meta-tag {
    padding: var(--spacing-xs) var(--spacing-sm);
    background: var(--bg-elevated);
    border-radius: var(--radius-sm);
    color: var(--text-secondary);
}

.meta-progress {
    color: var(--primary-neon);
    font-weight: 500;
}

/* ========================================
   研究团队 Section
   ======================================== */
.team-section {
    padding: var(--spacing-3xl) 0;
}

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

.team-card {
    padding: var(--spacing-2xl);
    border-radius: var(--radius-xl);
    text-align: center;
    transition: all var(--transition-base);
}

.team-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-glow);
}

.member-avatar {
    width: 100px;
    height: 100px;
    margin: 0 auto var(--spacing-lg);
    position: relative;
}

.avatar-placeholder {
    width: 100%;
    height: 100%;
    background: var(--gradient-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
}

.avatar-grid {
    position: absolute;
    width: 100%;
    height: 100%;
    background-image: 
        linear-gradient(rgba(255, 255, 255, 0.1) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255, 255, 255, 0.1) 1px, transparent 1px);
    background-size: 10px 10px;
}

.avatar-initial {
    font-family: var(--font-display);
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--bg-deep);
    z-index: 1;
}

.member-info {
    text-align: center;
}

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

.member-title {
    font-size: 0.9rem;
    color: var(--primary-neon);
    margin-bottom: var(--spacing-sm);
}

.member-desc {
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-lg);
}

.member-stats {
    display: flex;
    justify-content: center;
    gap: var(--spacing-xl);
}

.stat {
    text-align: center;
}

.stat-num {
    display: block;
    font-family: var(--font-display);
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-primary);
}

.stat-text {
    font-size: 0.75rem;
    color: var(--text-muted);
}

/* ========================================
   学术成果 Section
   ======================================== */
.publications-section {
    padding: var(--spacing-3xl) 0;
    background: linear-gradient(180deg, transparent 0%, rgba(124, 58, 237, 0.02) 50%, transparent 100%);
}

.publications-tabs {
    display: flex;
    justify-content: center;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-2xl);
}

.tab-btn {
    padding: var(--spacing-md) var(--spacing-xl);
    background: transparent;
    border: 1px solid var(--border-light);
    border-radius: var(--radius-md);
    color: var(--text-secondary);
    font-family: var(--font-body);
    font-size: 0.95rem;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-base);
}

.tab-btn:hover {
    background: rgba(255, 255, 255, 0.05);
    color: var(--text-primary);
}

.tab-btn.active {
    background: var(--gradient-primary);
    border-color: transparent;
    color: var(--bg-deep);
}

.tab-content {
    display: none;
}

.tab-content.active {
    display: block;
}

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

.publication-item {
    display: flex;
    gap: var(--spacing-lg);
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
    transition: all var(--transition-base);
}

.publication-item:hover {
    transform: translateX(8px);
    border-color: var(--border-glow);
}

.pub-type {
    padding: var(--spacing-sm) var(--spacing-md);
    background: var(--gradient-primary);
    border-radius: var(--radius-sm);
    font-family: var(--font-display);
    font-size: 0.75rem;
    font-weight: 700;
    color: var(--bg-deep);
    height: fit-content;
    white-space: nowrap;
}

.pub-content {
    flex: 1;
}

.pub-title {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
    line-height: 1.4;
}

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

.pub-journal {
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-bottom: var(--spacing-md);
}

.pub-metrics {
    display: flex;
    gap: var(--spacing-md);
}

.metric {
    font-size: 0.8rem;
    color: var(--primary-neon);
    padding: var(--spacing-xs) var(--spacing-sm);
    background: rgba(0, 255, 136, 0.1);
    border-radius: var(--radius-sm);
}

/* ========================================
   联系我们 Section
   ======================================== */
.contact-section {
    padding: var(--spacing-3xl) 0;
}

.contact-wrapper {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-3xl);
    align-items: start;
}

.contact-info {
    text-align: left;
}

.contact-info .section-badge {
    display: inline-block;
}

.contact-info .section-title {
    text-align: left;
}

.contact-description {
    font-size: 1.1rem;
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: var(--spacing-2xl);
}

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

.contact-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    transition: all var(--transition-base);
}

.contact-item:hover {
    transform: translateX(8px);
    border-color: var(--border-glow);
}

.contact-icon {
    width: 50px;
    height: 50px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(0, 255, 136, 0.1);
    border-radius: var(--radius-md);
    color: var(--primary-neon);
}

.contact-icon svg {
    width: 24px;
    height: 24px;
}

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

.contact-text .label {
    font-size: 0.8rem;
    color: var(--text-muted);
}

.contact-text .value {
    font-size: 1rem;
    font-weight: 500;
    color: var(--text-primary);
}

/* 联系表单 */
.contact-form {
    padding: var(--spacing-2xl);
    border-radius: var(--radius-xl);
}

.form-group {
    margin-bottom: var(--spacing-lg);
}

.form-group label {
    display: block;
    font-size: 0.9rem;
    font-weight: 500;
    margin-bottom: var(--spacing-sm);
    color: var(--text-primary);
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: var(--spacing-md);
    background: var(--bg-secondary);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-family: var(--font-body);
    font-size: 1rem;
    transition: all var(--transition-fast);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-neon);
    box-shadow: 0 0 0 3px rgba(0, 255, 136, 0.1);
}

.form-group input::placeholder,
.form-group textarea::placeholder {
    color: var(--text-muted);
}

.form-group textarea {
    resize: vertical;
    min-height: 120px;
}

.submit-button {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md) var(--spacing-xl);
    background: var(--gradient-primary);
    border: none;
    border-radius: var(--radius-md);
    color: var(--bg-deep);
    font-family: var(--font-body);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-base);
}

.submit-button:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-glow-lg);
}

/* ========================================
   Footer
   ======================================== */
.footer {
    background: var(--bg-primary);
    border-top: 1px solid var(--border-subtle);
    padding: var(--spacing-3xl) 0 var(--spacing-xl);
}

.footer-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 var(--spacing-xl);
}

.footer-main {
    display: grid;
    grid-template-columns: 1.5fr 2fr;
    gap: var(--spacing-3xl);
    margin-bottom: var(--spacing-2xl);
}

.footer-brand {
    max-width: 350px;
}

.footer-brand .logo {
    margin-bottom: var(--spacing-lg);
}

.footer-desc {
    font-size: 0.95rem;
    color: var(--text-secondary);
    line-height: 1.7;
}

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

.footer-column h4 {
    font-family: var(--font-display);
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: var(--spacing-lg);
    color: var(--text-primary);
}

.footer-column ul {
    list-style: none;
}

.footer-column li {
    margin-bottom: var(--spacing-sm);
}

.footer-column a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.9rem;
    transition: all var(--transition-fast);
}

.footer-column a:hover {
    color: var(--primary-neon);
    padding-left: var(--spacing-sm);
}

.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: var(--spacing-xl);
    border-top: 1px solid var(--border-subtle);
}

.footer-bottom p {
    font-size: 0.85rem;
    color: var(--text-muted);
}

.footer-social {
    display: flex;
    gap: var(--spacing-md);
}

.social-link {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-secondary);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-md);
    color: var(--text-secondary);
    transition: all var(--transition-base);
}

.social-link:hover {
    background: rgba(0, 255, 136, 0.1);
    border-color: var(--primary-neon);
    color: var(--primary-neon);
    transform: translateY(-2px);
}

.social-link svg {
    width: 20px;
    height: 20px;
}

/* ========================================
   响应式设计
   ======================================== */
@media (max-width: 1200px) {
    .hero {
        flex-direction: column;
        text-align: center;
        padding-top: 140px;
    }
    
    .hero-content {
        max-width: 100%;
    }
    
    .hero-buttons {
        justify-content: center;
    }
    
    .hero-stats {
        justify-content: center;
    }
    
    .hero-visual {
        margin-top: var(--spacing-2xl);
    }
    
    .visual-container {
        width: 400px;
        height: 400px;
    }
    
    .projects-showcase {
        grid-template-columns: 1fr;
    }
    
    .contact-wrapper {
        grid-template-columns: 1fr;
    }
    
    .contact-info {
        text-align: center;
    }
    
    .contact-info .section-title {
        text-align: center;
    }
}

@media (max-width: 992px) {
    .nav-links {
        display: none;
    }
    
    .footer-main {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .footer-brand {
        max-width: 100%;
        margin-bottom: var(--spacing-xl);
    }
    
    .footer-links {
        grid-template-columns: repeat(3, 1fr);
    }
}

@media (max-width: 768px) {
    :root {
        font-size: 14px;
    }
    
    .hero {
        padding: 120px var(--spacing-md) var(--spacing-2xl);
    }
    
    .visual-container {
        width: 300px;
        height: 300px;
    }
    
    .ring-1 {
        width: 200px;
        height: 200px;
    }
    
    .ring-2 {
        width: 260px;
        height: 260px;
    }
    
    .ring-3 {
        width: 300px;
        height: 300px;
    }
    
    .core-sphere {
        width: 80px;
        height: 80px;
    }
    
    .sphere-inner {
        width: 50px;
        height: 50px;
    }
    
    .floating-card {
        display: none;
    }
    
    .research-grid {
        grid-template-columns: 1fr;
    }
    
    .team-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-links {
        grid-template-columns: 1fr;
        gap: var(--spacing-2xl);
    }
    
    .footer-bottom {
        flex-direction: column;
        gap: var(--spacing-lg);
        text-align: center;
    }
}

@media (max-width: 480px) {
    .hero-stats {
        flex-direction: column;
        gap: var(--spacing-lg);
    }
    
    .stat-divider {
        width: 40px;
        height: 1px;
    }
    
    .hero-buttons {
        flex-direction: column;
    }
    
    .primary-button,
    .secondary-button {
        width: 100%;
        justify-content: center;
    }
    
    .publications-tabs {
        flex-direction: column;
    }
    
    .tab-btn {
        width: 100%;
    }
}

/* ========================================
   动画效果
   ======================================== */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

/* 减少动画偏好 */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
    
    .particle,
    .orbit-ring,
    .floating-card,
    .core-sphere {
        animation: none;
    }
}

/* ========================================
   Glow效果
   ======================================== */
.glow-effect {
    position: relative;
}

.button-glow {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 100%;
    height: 100%;
    background: var(--gradient-primary);
    filter: blur(20px);
    opacity: 0;
    transition: opacity var(--transition-base);
    pointer-events: none;
    z-index: -1;
}

.glow-effect:hover .button-glow {
    opacity: 0.5;
}