/* ============================================
   XIM工作室 - 现代化样式表 v2.0
   动态视觉效果 | 响应式交互 | 简洁现代设计
   ============================================ */

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

/* 图像渲染优化 */
img {
    image-rendering: -webkit-optimize-contrast;
    image-rendering: crisp-edges;
}

/* 平滑滚动 */
html {
    scroll-behavior: smooth;
    font-size: 16px;
}

/* 选中文字样式 */
::selection {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
}

::-moz-selection {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
}

/* ---------- CSS变量定义 - 现代配色方案 ---------- */
:root {
    /* 主色调 - 现代渐变 */
    --primary-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --primary-color: #667eea;
    --primary-hover: #764ba2;
    --accent-color: #00d4ff;
    --accent-glow: rgba(0, 212, 255, 0.3);
    
    /* 背景色 - 深邃暗色 */
    --bg-primary: #0a0a0f;
    --bg-secondary: #12121a;
    --bg-tertiary: #1a1a25;
    --bg-card: rgba(26, 26, 37, 0.8);
    --bg-glass: rgba(255, 255, 255, 0.03);
    
    /* 文字色 */
    --text-primary: #ffffff;
    --text-secondary: rgba(255, 255, 255, 0.7);
    --text-muted: rgba(255, 255, 255, 0.5);
    
    /* 边框与阴影 */
    --border-color: rgba(255, 255, 255, 0.1);
    --border-glow: rgba(102, 126, 234, 0.3);
    --shadow-soft: 0 8px 32px rgba(0, 0, 0, 0.3);
    --shadow-glow: 0 0 40px rgba(102, 126, 234, 0.2);
    
    /* 过渡动画 */
    --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-base: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 0.5s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-bounce: 0.5s cubic-bezier(0.68, -0.55, 0.265, 1.55);
}

/* ---------- 基础样式 ---------- */
body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* 添加字体 */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&display=swap');

.container {
    width: 100%;
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 24px;
}

/* ---------- 排版样式 ---------- */
h1, h2, h3, h4, h5, h6 {
    color: var(--text-primary);
    font-weight: 700;
    line-height: 1.2;
    letter-spacing: -0.02em;
}

h2 {
    font-size: clamp(2rem, 5vw, 3rem);
    text-align: center;
    margin-bottom: 1rem;
    background: linear-gradient(135deg, #fff 0%, rgba(255,255,255,0.8) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

h2::after {
    content: '';
    display: block;
    width: 60px;
    height: 4px;
    background: var(--primary-gradient);
    margin: 1rem auto 0;
    border-radius: 2px;
    transition: width var(--transition-base);
}

h2:hover::after {
    width: 100px;
}

p {
    color: var(--text-secondary);
    line-height: 1.8;
}

a {
    color: var(--accent-color);
    text-decoration: none;
    transition: var(--transition-base);
}

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

img {
    max-width: 100%;
    height: auto;
    border-radius: 12px;
}

/* ---------- 按钮样式 ---------- */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    background: var(--primary-gradient);
    color: white;
    padding: 14px 32px;
    border-radius: 50px;
    font-weight: 600;
    font-size: 0.95rem;
    letter-spacing: 0.5px;
    transition: all var(--transition-base);
    border: none;
    cursor: pointer;
    position: relative;
    overflow: hidden;
    box-shadow: 0 4px 15px rgba(102, 126, 234, 0.3);
}

.btn::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 0.6s ease;
}

.btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(102, 126, 234, 0.4);
}

.btn:hover::before {
    left: 100%;
}

.btn:active {
    transform: translateY(-1px);
}

/* 轮廓按钮 */
.btn-outline {
    background: transparent;
    border: 2px solid var(--primary-color);
    box-shadow: none;
}

.btn-outline:hover {
    background: var(--primary-gradient);
    border-color: transparent;
}

/* 高亮按钮 */
.btn-highlight {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 16px 40px;
    background: var(--primary-gradient);
    color: white;
    border-radius: 50px;
    font-weight: 700;
    font-size: 1rem;
    letter-spacing: 1px;
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
    box-shadow: 0 10px 30px rgba(102, 126, 234, 0.3);
}

.btn-highlight::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.4), transparent);
    transition: left 0.6s ease;
}

.btn-highlight:hover {
    transform: translateY(-5px) scale(1.02);
    box-shadow: 0 15px 40px rgba(102, 126, 234, 0.4);
}

.btn-highlight:hover::before {
    left: 100%;
}

/* ---------- 导航栏样式 ---------- */
nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: 20px 0;
    background: rgba(10, 10, 15, 0.8);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-color);
    transition: all var(--transition-base);
}

nav.scrolled {
    padding: 12px 0;
    background: rgba(10, 10, 15, 0.95);
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.3);
}

nav .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
    transition: var(--transition-base);
}

.logo img {
    width: 42px;
    height: 42px;
    border-radius: 12px;
    transition: all var(--transition-base);
    box-shadow: 0 4px 15px rgba(102, 126, 234, 0.3);
}

.logo:hover img {
    transform: rotate(8deg) scale(1.1);
    box-shadow: 0 6px 20px rgba(102, 126, 234, 0.5);
}

.logo span {
    font-size: 1.4rem;
    font-weight: 700;
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav-links {
    display: flex;
    gap: 32px;
}

.nav-links a {
    color: var(--text-secondary);
    font-weight: 500;
    font-size: 0.95rem;
    position: relative;
    padding: 8px 0;
    transition: color var(--transition-base);
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary-gradient);
    transition: width var(--transition-base);
    border-radius: 1px;
}

.nav-links a:hover {
    color: var(--text-primary);
}

.nav-links a:hover::after,
.nav-links a.active::after {
    width: 100%;
}

/* 布局切换器 */
.layout-switcher {
    display: flex;
    gap: 8px;
    margin-left: 20px;
}

.layout-btn {
    width: 38px;
    height: 38px;
    border-radius: 10px;
    background: var(--bg-glass);
    color: var(--text-muted);
    border: 1px solid var(--border-color);
    cursor: pointer;
    transition: all var(--transition-base);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.9rem;
}

.layout-btn:hover {
    background: var(--primary-gradient);
    color: white;
    border-color: transparent;
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(102, 126, 234, 0.4);
}

.layout-btn.active {
    background: var(--primary-gradient);
    color: white;
    border-color: transparent;
    box-shadow: 0 4px 15px rgba(102, 126, 234, 0.4);
}

/* 移动端菜单 */
.menu-toggle {
    display: none;
    font-size: 1.4rem;
    cursor: pointer;
    color: var(--text-primary);
    padding: 8px;
    border-radius: 8px;
    transition: var(--transition-base);
}

.menu-toggle:hover {
    background: var(--bg-glass);
    color: var(--primary-color);
}

.mobile-nav-content {
    display: none;
}

/* ---------- 首页横幅样式 ---------- */
#home {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
    background: linear-gradient(135deg, rgba(10, 10, 15, 0.95) 0%, rgba(18, 18, 26, 0.9) 100%);
}

/* 动态背景粒子效果 */
#home::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        radial-gradient(circle at 20% 80%, rgba(102, 126, 234, 0.15) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, rgba(118, 75, 162, 0.15) 0%, transparent 50%),
        radial-gradient(circle at 50% 50%, rgba(0, 212, 255, 0.05) 0%, transparent 70%);
    animation: backgroundPulse 8s ease-in-out infinite;
}

@keyframes backgroundPulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.7; }
}

/* 浮动粒子 */
.particles {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    overflow: hidden;
    pointer-events: none;
}

.particle {
    position: absolute;
    width: 4px;
    height: 4px;
    background: var(--accent-color);
    border-radius: 50%;
    opacity: 0.3;
    animation: float 15s infinite;
}

.particle:nth-child(1) { left: 10%; animation-delay: 0s; animation-duration: 20s; }
.particle:nth-child(2) { left: 20%; animation-delay: 2s; animation-duration: 25s; }
.particle:nth-child(3) { left: 30%; animation-delay: 4s; animation-duration: 18s; }
.particle:nth-child(4) { left: 40%; animation-delay: 1s; animation-duration: 22s; }
.particle:nth-child(5) { left: 50%; animation-delay: 3s; animation-duration: 20s; }
.particle:nth-child(6) { left: 60%; animation-delay: 5s; animation-duration: 24s; }
.particle:nth-child(7) { left: 70%; animation-delay: 2s; animation-duration: 19s; }
.particle:nth-child(8) { left: 80%; animation-delay: 4s; animation-duration: 21s; }
.particle:nth-child(9) { left: 90%; animation-delay: 1s; animation-duration: 23s; }

@keyframes float {
    0%, 100% {
        transform: translateY(100vh) rotate(0deg);
        opacity: 0;
    }
    10% {
        opacity: 0.3;
    }
    90% {
        opacity: 0.3;
    }
    100% {
        transform: translateY(-100vh) rotate(720deg);
        opacity: 0;
    }
}

#home .container {
    position: relative;
    z-index: 1;
    text-align: center;
}

.hero-content {
    max-width: 900px;
    margin: 0 auto;
}

.hero-content h1 {
    font-size: clamp(3rem, 8vw, 5.5rem);
    margin-bottom: 1.5rem;
    background: linear-gradient(135deg, #fff 0%, var(--accent-color) 50%, #fff 100%);
    background-size: 200% auto;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: gradientFlow 3s ease infinite;
    letter-spacing: -0.03em;
}

@keyframes gradientFlow {
    0%, 100% { background-position: 0% center; }
    50% { background-position: 100% center; }
}

.hero-content p {
    font-size: clamp(1.2rem, 3vw, 1.6rem);
    margin-bottom: 3rem;
    color: var(--text-secondary);
    animation: fadeInUp 1s ease 0.3s both;
}

.hero-content .btn {
    animation: fadeInUp 1s ease 0.5s both;
    padding: 16px 40px;
    font-size: 1.1rem;
}

/* 滚动指示器 */
.scroll-indicator {
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    opacity: 0.6;
    animation: bounce 2s infinite;
}

.scroll-indicator span {
    font-size: 0.75rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 2px;
}

.scroll-indicator i {
    font-size: 1.2rem;
    color: var(--accent-color);
}

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

/* ---------- 通用区块样式 ---------- */
section {
    padding: 120px 0;
    position: relative;
}

.section-subtitle {
    text-align: center;
    max-width: 600px;
    margin: 0 auto 60px;
    font-size: 1.1rem;
    color: var(--text-secondary);
}

/* ---------- 关于我们样式 ---------- */
#about {
    background: var(--bg-secondary);
    position: relative;
    overflow: hidden;
}

#about::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -20%;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(102, 126, 234, 0.1) 0%, transparent 70%);
    border-radius: 50%;
    animation: pulse 10s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { transform: scale(1); opacity: 0.5; }
    50% { transform: scale(1.2); opacity: 0.8; }
}

.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    align-items: center;
}

.about-text h2 {
    text-align: left;
    margin-bottom: 1.5rem;
}

.about-text h2::after {
    margin: 1rem 0 0;
}

.about-text p {
    font-size: 1.1rem;
    margin-bottom: 1.5rem;
}

.about-image {
    position: relative;
    border-radius: 20px;
    overflow: hidden;
    box-shadow: var(--shadow-glow);
    transition: all var(--transition-slow);
}

.about-image::before {
    content: '';
    position: absolute;
    inset: -3px;
    background: var(--primary-gradient);
    border-radius: 23px;
    z-index: -1;
    opacity: 0;
    transition: opacity var(--transition-base);
}

.about-image:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 60px rgba(102, 126, 234, 0.3);
}

.about-image:hover::before {
    opacity: 1;
}

.about-image img {
    width: 100%;
    border-radius: 20px;
    transition: transform var(--transition-slow);
}

.about-image:hover img {
    transform: scale(1.05);
}

/* ---------- 文档中心样式 ---------- */
#docs {
    background: var(--bg-primary);
    position: relative;
    overflow: hidden;
}

#docs::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        radial-gradient(circle at 30% 70%, rgba(0, 212, 255, 0.08) 0%, transparent 50%),
        radial-gradient(circle at 70% 30%, rgba(102, 126, 234, 0.08) 0%, transparent 50%);
}

#docs .container {
    position: relative;
    z-index: 1;
    text-align: center;
}

.docs-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 24px;
    padding: 60px 40px;
    max-width: 800px;
    margin: 0 auto;
    backdrop-filter: blur(10px);
    transition: all var(--transition-base);
}

.docs-card:hover {
    border-color: var(--border-glow);
    box-shadow: var(--shadow-glow);
    transform: translateY(-5px);
}

.docs-card h2 {
    margin-bottom: 1rem;
}

.docs-card p {
    margin-bottom: 2rem;
    font-size: 1.1rem;
}

/* ---------- XIM New 样式 ---------- */
#news {
    background: var(--bg-secondary);
    position: relative;
    overflow: hidden;
}

#news::before {
    content: '';
    position: absolute;
    bottom: -30%;
    left: -10%;
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, rgba(118, 75, 162, 0.1) 0%, transparent 70%);
    border-radius: 50%;
    animation: pulse 12s ease-in-out infinite reverse;
}

.news-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 24px;
    padding: 60px 40px;
    max-width: 800px;
    margin: 0 auto;
    backdrop-filter: blur(10px);
    text-align: center;
    transition: all var(--transition-base);
}

.news-card:hover {
    border-color: var(--border-glow);
    box-shadow: var(--shadow-glow);
    transform: translateY(-5px);
}

.news-card p {
    margin-bottom: 2rem;
    font-size: 1.1rem;
}

/* ---------- 项目展示样式 ---------- */
#projects {
    background: var(--bg-primary);
    position: relative;
}

.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
    margin-top: 60px;
}

.project-item {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 20px;
    overflow: hidden;
    transition: all var(--transition-base);
    position: relative;
}

.project-item::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--primary-gradient);
    transform: scaleX(0);
    transition: transform var(--transition-base);
}

.project-item:hover {
    transform: translateY(-10px);
    border-color: var(--border-glow);
    box-shadow: var(--shadow-glow);
}

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

.project-image {
    position: relative;
    height: 220px;
    overflow: hidden;
}

.project-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-slow);
}

.project-item:hover .project-image img {
    transform: scale(1.1);
}

.project-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(to top, rgba(10, 10, 15, 0.95) 0%, transparent 60%);
    display: flex;
    align-items: flex-end;
    padding: 24px;
    opacity: 0;
    transition: opacity var(--transition-base);
}

.project-item:hover .project-overlay {
    opacity: 1;
}

.project-content {
    transform: translateY(20px);
    transition: transform var(--transition-base);
}

.project-item:hover .project-content {
    transform: translateY(0);
}

.project-content h3 {
    font-size: 1.3rem;
    margin-bottom: 8px;
    color: var(--text-primary);
}

.project-content p {
    font-size: 0.95rem;
    margin-bottom: 16px;
    color: var(--text-secondary);
}

.project-info {
    padding: 24px;
}

.project-info h3 {
    font-size: 1.2rem;
    margin-bottom: 8px;
    color: var(--text-primary);
}

.project-info p {
    font-size: 0.9rem;
    color: var(--text-muted);
    margin-bottom: 16px;
}

/* ---------- XIM部门样式 ---------- */
#departments {
    background: var(--bg-secondary);
    position: relative;
    overflow: hidden;
}

#departments::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 800px;
    height: 800px;
    background: radial-gradient(circle, rgba(102, 126, 234, 0.05) 0%, transparent 70%);
    border-radius: 50%;
}

.departments-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 30px;
    margin-top: 60px;
    position: relative;
    z-index: 1;
}

.department-item {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 20px;
    overflow: hidden;
    transition: all var(--transition-base);
}

.department-item:hover {
    transform: translateY(-10px);
    border-color: var(--border-glow);
    box-shadow: var(--shadow-glow);
}

.department-image {
    height: 180px;
    overflow: hidden;
    position: relative;
}

.department-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-slow);
}

.department-item:hover .department-image img {
    transform: scale(1.1);
}

.department-content {
    padding: 28px;
}

.department-content h3 {
    font-size: 1.3rem;
    margin-bottom: 12px;
    color: var(--text-primary);
    transition: color var(--transition-base);
}

.department-item:hover .department-content h3 {
    color: var(--primary-color);
}

.department-content p {
    font-size: 0.95rem;
    margin-bottom: 20px;
    color: var(--text-secondary);
}

/* ---------- 页脚样式 ---------- */
.footer {
    background: var(--bg-tertiary);
    padding: 60px 0 30px;
    border-top: 1px solid var(--border-color);
    position: relative;
}

.footer::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: var(--primary-gradient);
    opacity: 0.5;
}

.footer-content {
    text-align: center;
}

.footer-content p {
    color: var(--text-muted);
    font-size: 0.9rem;
}

/* ---------- 动画定义 ---------- */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(40px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

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

@keyframes scaleIn {
    from {
        opacity: 0;
        transform: scale(0.9);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

@keyframes slideInLeft {
    from {
        opacity: 0;
        transform: translateX(-50px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes slideInRight {
    from {
        opacity: 0;
        transform: translateX(50px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

/* 滚动触发动画类 */
.animate-on-scroll {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}

.animate-on-scroll.visible {
    opacity: 1;
    transform: translateY(0);
}

.animate-fade-in {
    opacity: 0;
    transition: opacity 0.8s ease;
}

.animate-fade-in.visible {
    opacity: 1;
}

.animate-scale-in {
    opacity: 0;
    transform: scale(0.9);
    transition: all 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}

.animate-scale-in.visible {
    opacity: 1;
    transform: scale(1);
}

/* 交错动画延迟 */
.stagger-1 { transition-delay: 0.1s; }
.stagger-2 { transition-delay: 0.2s; }
.stagger-3 { transition-delay: 0.3s; }
.stagger-4 { transition-delay: 0.4s; }
.stagger-5 { transition-delay: 0.5s; }

/* ---------- 响应式设计 ---------- */
@media (max-width: 992px) {
    .about-content {
        grid-template-columns: 1fr;
        gap: 50px;
    }
    
    .about-image {
        order: -1;
        max-width: 500px;
        margin: 0 auto;
    }
    
    .about-text h2 {
        text-align: center;
    }
    
    .about-text h2::after {
        margin: 1rem auto 0;
    }
    
    .projects-grid,
    .departments-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .nav-links {
        display: none;
    }
    
    .menu-toggle {
        display: block;
    }
    
    .layout-switcher {
        margin-left: auto;
        margin-right: 12px;
    }
    
    section {
        padding: 80px 0;
    }
    
    .projects-grid,
    .departments-grid {
        grid-template-columns: 1fr;
    }
    
    .docs-card,
    .news-card {
        padding: 40px 24px;
    }
    
    .scroll-indicator {
        display: none;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 16px;
    }
    
    .layout-btn {
        width: 34px;
        height: 34px;
    }
    
    .btn,
    .btn-highlight {
        padding: 12px 24px;
        font-size: 0.9rem;
    }
    
    .project-overlay {
        opacity: 1;
        background: linear-gradient(to top, rgba(10, 10, 15, 0.9) 0%, transparent 100%);
    }
    
    .project-content {
        transform: translateY(0);
    }
}

/* ============================================
   三种布局模式样式
   ============================================ */

/* ---------- Layout 1: 分层卡片式布局 ---------- */
.layout1 #about,
.layout1 #docs,
.layout1 #news,
.layout1 #projects,
.layout1 #departments {
    position: relative;
    padding: 120px 0;
    margin: 40px auto;
    max-width: 1400px;
    width: 92%;
    border-radius: 30px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-soft);
    overflow: hidden;
}

.layout1 #about {
    z-index: 1;
}

.layout1 #docs {
    z-index: 2;
    margin-top: -60px;
}

.layout1 #news {
    z-index: 3;
    margin-top: -60px;
}

.layout1 #projects {
    z-index: 4;
    margin-top: -60px;
    background: transparent;
    border: none;
    box-shadow: none;
}

.layout1 #departments {
    z-index: 5;
    margin-top: -60px;
}

.layout1 .docs-card,
.layout1 .news-card {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
}

/* ---------- Layout 2: 不对称动态布局 ---------- */
.layout2 #about {
    padding: 150px 0;
    background: var(--bg-secondary);
    position: relative;
    overflow: hidden;
}

.layout2 #about::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-color), var(--accent-color), var(--primary-color));
    background-size: 200% 100%;
    animation: gradientMove 3s linear infinite;
}

@keyframes gradientMove {
    0% { background-position: 0% 50%; }
    100% { background-position: 200% 50%; }
}

.layout2 .about-content {
    display: grid;
    grid-template-columns: 1.2fr 0.8fr;
    gap: 100px;
    align-items: center;
}

.layout2 .about-text {
    background: var(--bg-card);
    padding: 60px;
    border-radius: 24px;
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-soft);
    transform: translateX(30px);
}

.layout2 .about-image {
    transform: translateX(-30px) rotate(3deg);
    transition: all var(--transition-slow);
}

.layout2 .about-image:hover {
    transform: translateX(-30px) rotate(0deg) scale(1.02);
}

.layout2 #docs,
.layout2 #news {
    padding: 150px 0;
    position: relative;
}

.layout2 #docs::before,
.layout2 #news::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, transparent, var(--accent-color), transparent);
}

.layout2 .docs-card,
.layout2 .news-card {
    transform: rotate(-1deg);
    transition: all var(--transition-base);
}

.layout2 .docs-card:hover,
.layout2 .news-card:hover {
    transform: rotate(0deg) scale(1.02);
}

.layout2 .projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 40px;
}

.layout2 .project-item:nth-child(odd) {
    transform: rotate(-2deg) translateY(20px);
}

.layout2 .project-item:nth-child(even) {
    transform: rotate(2deg) translateY(-20px);
}

.layout2 .project-item:hover {
    transform: rotate(0deg) translateY(-15px) scale(1.03) !important;
    z-index: 10;
}

.layout2 .departments-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 50px;
}

.layout2 .department-item:nth-child(1) {
    transform: translateY(0) rotate(-2deg);
}

.layout2 .department-item:nth-child(2) {
    transform: translateY(40px) rotate(1deg);
}

.layout2 .department-item:nth-child(3) {
    transform: translateY(-20px) rotate(2deg);
}

.layout2 .department-item:hover {
    transform: translateY(-15px) rotate(0deg) scale(1.03) !important;
}

/* ---------- Layout 3: 沉浸式全屏布局 ---------- */
.layout3 #home {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
}

.layout3 #about,
.layout3 #docs,
.layout3 #news,
.layout3 #projects,
.layout3 #departments {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 80px 0;
}

.layout3 .about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    align-items: center;
    background: var(--bg-card);
    padding: 80px;
    border-radius: 30px;
    border: 1px solid var(--border-color);
    backdrop-filter: blur(20px);
    box-shadow: var(--shadow-soft);
}

.layout3 .docs-card,
.layout3 .news-card {
    background: var(--bg-card);
    padding: 100px 80px;
    border-radius: 30px;
    border: 1px solid var(--border-color);
    backdrop-filter: blur(20px);
    box-shadow: var(--shadow-soft);
}

.layout3 .projects-grid {
    background: var(--bg-card);
    padding: 60px;
    border-radius: 30px;
    border: 1px solid var(--border-color);
    backdrop-filter: blur(20px);
}

.layout3 .departments-grid {
    background: var(--bg-card);
    padding: 60px;
    border-radius: 30px;
    border: 1px solid var(--border-color);
    backdrop-filter: blur(20px);
}

/* 滚动指示器 - 仅layout3显示 */
.layout3 section::after {
    content: '';
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
    width: 30px;
    height: 50px;
    border: 2px solid var(--primary-color);
    border-radius: 15px;
    opacity: 0.5;
}

.layout3 section::before {
    content: '';
    position: absolute;
    bottom: 60px;
    left: 50%;
    transform: translateX(-50%);
    width: 6px;
    height: 10px;
    background: var(--primary-color);
    border-radius: 3px;
    animation: scrollDot 2s ease-in-out infinite;
}

@keyframes scrollDot {
    0% {
        transform: translateX(-50%) translateY(0);
        opacity: 1;
    }
    100% {
        transform: translateX(-50%) translateY(20px);
        opacity: 0;
    }
}

/* 布局切换过渡动画 */
body {
    transition: opacity 0.3s ease;
}

/* ---------- 响应式布局调整 ---------- */
@media (max-width: 992px) {
    .layout1 #about,
    .layout1 #docs,
    .layout1 #news,
    .layout1 #projects,
    .layout1 #departments {
        width: 95%;
        margin: 20px auto;
        padding: 80px 0;
    }
    
    .layout1 #docs,
    .layout1 #news,
    .layout1 #projects,
    .layout1 #departments {
        margin-top: -30px;
    }
    
    .layout2 .about-content {
        grid-template-columns: 1fr;
        gap: 50px;
    }
    
    .layout2 .about-text {
        transform: translateX(0);
        padding: 40px;
    }
    
    .layout2 .about-image {
        transform: translateX(0) rotate(0deg);
        max-width: 500px;
        margin: 0 auto;
    }
    
    .layout2 .project-item:nth-child(odd),
    .layout2 .project-item:nth-child(even) {
        transform: rotate(0deg) translateY(0);
    }
    
    .layout2 .department-item:nth-child(1),
    .layout2 .department-item:nth-child(2),
    .layout2 .department-item:nth-child(3) {
        transform: translateY(0) rotate(0deg);
    }
    
    .layout3 .about-content {
        grid-template-columns: 1fr;
        gap: 50px;
        padding: 50px;
    }
    
    .layout3 .docs-card,
    .layout3 .news-card {
        padding: 60px 40px;
    }
    
    .layout3 .projects-grid,
    .layout3 .departments-grid {
        padding: 40px;
    }
}

@media (max-width: 768px) {
    .layout2 .about-text {
        padding: 30px;
    }
    
    .layout3 .about-content {
        padding: 30px;
    }
    
    .layout3 .docs-card,
    .layout3 .news-card {
        padding: 40px 24px;
    }
    
    .layout3 .projects-grid,
    .layout3 .departments-grid {
        padding: 24px;
    }
    
    .layout3 section::before,
    .layout3 section::after {
        display: none;
    }
}

/* ---------- 特殊效果 ---------- */
/* 玻璃态效果 */
.glass {
    background: var(--bg-glass);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--border-color);
}

/* 发光效果 */
.glow {
    box-shadow: 0 0 30px var(--accent-glow);
}

/* 渐变文字 */
.gradient-text {
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* 加载动画 */
.loading {
    position: relative;
    overflow: hidden;
}

.loading::after {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.1), transparent);
    animation: shimmer 1.5s infinite;
}

@keyframes shimmer {
    100% { left: 100%; }
}