/* 基础样式重置 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

/* 根变量定义 - 专业低饱和科技感配色系统 */
:root {
    /* 主色调 - 专业蓝灰系 */
    --primary-color: #5B7BA8;
    --primary-light: #7A9BC7;
    --primary-dark: #4A6B8A;
    --primary-50: rgba(91, 123, 168, 0.05);
    --primary-100: rgba(91, 123, 168, 0.1);
    --primary-200: rgba(91, 123, 168, 0.2);
    
    /* 辅助色 - 中性灰系 */
    --secondary-color: #8A95A8;
    --secondary-light: #A8B5C7;
    --secondary-dark: #6B7A8A;
    --secondary-50: rgba(138, 149, 168, 0.05);
    --secondary-100: rgba(138, 149, 168, 0.1);
    
    /* 强调色 - 科技绿系 */
    --accent-color: #6B8B7A;
    --accent-light: #8AAB9A;
    --accent-dark: #5A7A6B;
    --accent-50: rgba(107, 139, 122, 0.05);
    --accent-100: rgba(107, 139, 122, 0.1);
    
    /* 警告色 - 温暖橙系 */
    --warning-color: #C78A5B;
    --warning-light: #D19A7A;
    --warning-dark: #B87A4A;
    --warning-50: rgba(199, 138, 91, 0.05);
    --warning-100: rgba(199, 138, 91, 0.1);
    
    /* 背景色 - 深度层次 */
    --bg-primary: #0A0E13;
    --bg-secondary: #151A20;
    --bg-tertiary: #1F252B;
    --bg-card: #1A1F26;
    --bg-elevated: #252A32;
    
    /* 文字颜色 - 高对比度 */
    --text-primary: #F0F4F8;
    --text-secondary: #C8D5E0;
    --text-tertiary: #9AABB8;
    --text-muted: #7A8B9A;
    --text-disabled: #5A6B7A;
    
    /* 边框和分割线 */
    --border-color: #2A2F37;
    --border-light: #3A3F47;
    --border-lighter: #4A4F57;
    --border-subtle: #1A1F26;
    
    /* 专业渐变 */
    --gradient-primary: linear-gradient(135deg, #5B7BA8 0%, #7A9BC7 100%);
    --gradient-secondary: linear-gradient(135deg, #8A95A8 0%, #A8B5C7 100%);
    --gradient-accent: linear-gradient(135deg, #6B8B7A 0%, #8AAB9A 100%);
    --gradient-warning: linear-gradient(135deg, #C78A5B 0%, #D19A7A 100%);
    --gradient-bg: linear-gradient(135deg, #0A0E13 0%, #151A20 100%);
    --gradient-card: linear-gradient(135deg, #1A1F26 0%, #252A32 100%);
    
    /* 专业阴影系统 */
    --shadow-xs: 0 1px 2px rgba(0, 0, 0, 0.2);
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.25);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.4);
    --shadow-xl: 0 16px 64px rgba(0, 0, 0, 0.5);
    --shadow-glow: 0 0 20px rgba(91, 123, 168, 0.15);
    
    /* 动画系统 */
    --transition-fast: 0.15s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    --transition-normal: 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    --transition-slow: 0.5s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    --transition-bounce: 0.3s cubic-bezier(0.68, -0.55, 0.265, 1.55);
    --transition-smooth: 0.4s cubic-bezier(0.23, 1, 0.32, 1);
    
    /* 间距系统 */
    --space-xs: 0.25rem;
    --space-sm: 0.5rem;
    --space-md: 1rem;
    --space-lg: 1.5rem;
    --space-xl: 2rem;
    --space-2xl: 3rem;
    --space-3xl: 4rem;
    --space-4xl: 6rem;
    
    /* 圆角系统 */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
    --radius-2xl: 24px;
}

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

/* 容器 */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* 导航栏 */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(10, 14, 19, 0.85);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-subtle);
    z-index: 1000;
    transition: var(--transition-normal);
    box-shadow: var(--shadow-sm);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 70px;
}

.nav-logo .logo-text {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-primary);
}

.nav-menu {
    display: flex;
    gap: 2rem;
}

.nav-link {
    color: var(--text-tertiary);
    text-decoration: none;
    font-weight: 500;
    font-size: 0.95rem;
    letter-spacing: 0.01em;
    transition: var(--transition-normal);
    position: relative;
    padding: var(--space-sm) var(--space-md);
    border-radius: var(--radius-md);
}

.nav-link:hover {
    color: var(--text-primary);
    background: var(--primary-50);
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 50%;
    transform: translateX(-50%);
    width: 0;
    height: 2px;
    background: var(--gradient-primary);
    border-radius: 1px;
    transition: var(--transition-normal);
}

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

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

.bar {
    width: 25px;
    height: 3px;
    background: var(--text-primary);
    margin: 3px 0;
    transition: var(--transition-fast);
}

/* 主要内容区域 */
main {
    margin-top: 70px;
}

/* 首页横幅 */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    background: var(--gradient-bg);
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        radial-gradient(circle at 20% 30%, var(--primary-50) 0%, transparent 60%),
        radial-gradient(circle at 80% 70%, var(--accent-50) 0%, transparent 60%),
        radial-gradient(circle at 50% 10%, var(--secondary-50) 0%, transparent 50%);
    pointer-events: none;
}

.hero::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        linear-gradient(135deg, transparent 0%, rgba(91, 123, 168, 0.02) 50%, transparent 100%),
        linear-gradient(45deg, transparent 0%, rgba(107, 139, 122, 0.02) 50%, transparent 100%);
    pointer-events: none;
}

.hero-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
    position: relative;
    z-index: 1;
}

.hero-content {
    max-width: 600px;
}

.hero-title {
    margin-bottom: 1.5rem;
}

.title-main {
    display: block;
    font-size: 3rem;
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
}

.title-sub {
    display: block;
    font-size: 1.5rem;
    font-weight: 400;
    color: var(--text-secondary);
}

.hero-description {
    font-size: 1.2rem;
    color: var(--text-secondary);
    margin-bottom: 2rem;
    line-height: 1.7;
}

.hero-cta {
    display: flex;
    gap: 1rem;
}

.cta-button {
    padding: var(--space-lg) var(--space-2xl);
    border: none;
    border-radius: var(--radius-lg);
    font-size: 1rem;
    font-weight: 600;
    letter-spacing: 0.02em;
    cursor: pointer;
    transition: var(--transition-normal);
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.cta-button::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.1), transparent);
    transition: var(--transition-slow);
}

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

.cta-button.primary {
    background: var(--text-primary);
    color: var(--bg-primary);
    box-shadow: var(--shadow-md);
    border: 1px solid var(--text-primary);
}

.cta-button.primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
    background: var(--text-secondary);
    border-color: var(--text-secondary);
}

.cta-button.secondary {
    background: transparent;
    color: var(--text-primary);
    border: 1px solid var(--text-primary);
    backdrop-filter: blur(10px);
}

.cta-button.secondary:hover {
    background: var(--text-primary);
    color: var(--bg-primary);
    border-color: var(--text-primary);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

/* 科技网格背景 */
.hero-visual {
    display: flex;
    justify-content: center;
    align-items: center;
}

.tech-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
    width: 300px;
    height: 300px;
}

.grid-item {
    background: var(--gradient-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    position: relative;
    overflow: hidden;
    transition: var(--transition-slow);
    backdrop-filter: blur(10px);
}

/* 为每个网格项添加不同的背景颜色 */
.grid-item:nth-child(1) {
    background: linear-gradient(135deg, var(--primary-100) 0%, var(--primary-50) 100%);
    border-color: var(--primary-200);
}

.grid-item:nth-child(2) {
    background: linear-gradient(135deg, var(--accent-100) 0%, var(--accent-50) 100%);
    border-color: var(--accent-200);
}

.grid-item:nth-child(3) {
    background: linear-gradient(135deg, var(--warning-100) 0%, var(--warning-50) 100%);
    border-color: var(--warning-200);
}

.grid-item:nth-child(4) {
    background: linear-gradient(135deg, var(--secondary-100) 0%, var(--secondary-50) 100%);
    border-color: var(--secondary-200);
}

.grid-item:nth-child(5) {
    background: linear-gradient(135deg, var(--primary-200) 0%, var(--primary-100) 100%);
    border-color: var(--primary-color);
    box-shadow: var(--shadow-glow);
}

.grid-item:nth-child(6) {
    background: linear-gradient(135deg, var(--accent-100) 0%, var(--accent-50) 100%);
    border-color: var(--accent-200);
}

.grid-item:nth-child(7) {
    background: linear-gradient(135deg, var(--warning-100) 0%, var(--warning-50) 100%);
    border-color: var(--warning-200);
}

.grid-item:nth-child(8) {
    background: linear-gradient(135deg, var(--secondary-100) 0%, var(--secondary-50) 100%);
    border-color: var(--secondary-200);
}

.grid-item:nth-child(9) {
    background: linear-gradient(135deg, var(--primary-100) 0%, var(--primary-50) 100%);
    border-color: var(--primary-200);
}

.grid-item::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--gradient-primary);
    opacity: 0;
    transition: var(--transition-slow);
}

.grid-item:hover::before {
    opacity: 0.2;
}

/* 增强悬停效果 */
.grid-item:nth-child(1):hover {
    background: linear-gradient(135deg, rgba(74, 111, 165, 0.2) 0%, rgba(74, 111, 165, 0.1) 100%);
    border-color: rgba(74, 111, 165, 0.5);
    box-shadow: 0 0 20px rgba(74, 111, 165, 0.2);
}

.grid-item:nth-child(2):hover {
    background: linear-gradient(135deg, rgba(90, 139, 122, 0.2) 0%, rgba(90, 139, 122, 0.1) 100%);
    border-color: rgba(90, 139, 122, 0.5);
    box-shadow: 0 0 20px rgba(90, 139, 122, 0.2);
}

.grid-item:nth-child(3):hover {
    background: linear-gradient(135deg, rgba(184, 122, 74, 0.2) 0%, rgba(184, 122, 74, 0.1) 100%);
    border-color: rgba(184, 122, 74, 0.5);
    box-shadow: 0 0 20px rgba(184, 122, 74, 0.2);
}

.grid-item:nth-child(4):hover {
    background: linear-gradient(135deg, rgba(122, 139, 154, 0.2) 0%, rgba(122, 139, 154, 0.1) 100%);
    border-color: rgba(122, 139, 154, 0.5);
    box-shadow: 0 0 20px rgba(122, 139, 154, 0.2);
}

.grid-item:nth-child(5):hover {
    background: linear-gradient(135deg, rgba(74, 111, 165, 0.25) 0%, rgba(74, 111, 165, 0.15) 100%);
    border-color: rgba(74, 111, 165, 0.6);
    box-shadow: 0 0 25px rgba(74, 111, 165, 0.3);
}

.grid-item:nth-child(6):hover {
    background: linear-gradient(135deg, rgba(90, 139, 122, 0.2) 0%, rgba(90, 139, 122, 0.1) 100%);
    border-color: rgba(90, 139, 122, 0.5);
    box-shadow: 0 0 20px rgba(90, 139, 122, 0.2);
}

.grid-item:nth-child(7):hover {
    background: linear-gradient(135deg, rgba(184, 122, 74, 0.2) 0%, rgba(184, 122, 74, 0.1) 100%);
    border-color: rgba(184, 122, 74, 0.5);
    box-shadow: 0 0 20px rgba(184, 122, 74, 0.2);
}

.grid-item:nth-child(8):hover {
    background: linear-gradient(135deg, rgba(122, 139, 154, 0.2) 0%, rgba(122, 139, 154, 0.1) 100%);
    border-color: rgba(122, 139, 154, 0.5);
    box-shadow: 0 0 20px rgba(122, 139, 154, 0.2);
}

.grid-item:nth-child(9):hover {
    background: linear-gradient(135deg, rgba(74, 111, 165, 0.2) 0%, rgba(74, 111, 165, 0.1) 100%);
    border-color: rgba(74, 111, 165, 0.5);
    box-shadow: 0 0 20px rgba(74, 111, 165, 0.2);
}

.grid-item:nth-child(1), .grid-item:nth-child(3), .grid-item:nth-child(7), .grid-item:nth-child(9) {
    animation: pulse 2s ease-in-out infinite;
}

.grid-item:nth-child(2), .grid-item:nth-child(4), .grid-item:nth-child(6), .grid-item:nth-child(8) {
    animation: pulse 2s ease-in-out infinite 0.5s;
}

.grid-item:nth-child(5) {
    animation: pulse 2s ease-in-out infinite 1s;
}

/* 为不同位置的网格项添加不同的颜色效果 */
.grid-item:nth-child(1)::before {
    background: var(--gradient-primary);
}

.grid-item:nth-child(2)::before {
    background: var(--gradient-accent);
}

.grid-item:nth-child(3)::before {
    background: var(--gradient-warning);
}

.grid-item:nth-child(4)::before {
    background: var(--gradient-secondary);
}

.grid-item:nth-child(5)::before {
    background: var(--gradient-primary);
}

.grid-item:nth-child(6)::before {
    background: var(--gradient-accent);
}

.grid-item:nth-child(7)::before {
    background: var(--gradient-warning);
}

.grid-item:nth-child(8)::before {
    background: var(--gradient-secondary);
}

.grid-item:nth-child(9)::before {
    background: var(--gradient-primary);
}

@keyframes pulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.05); }
}

/* 通用部分样式 */
section {
    padding: var(--space-4xl) 0;
}

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

.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: var(--space-lg);
    color: var(--text-primary);
    letter-spacing: -0.02em;
    line-height: 1.2;
}

.section-subtitle {
    font-size: 1.2rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
    line-height: 1.6;
    font-weight: 400;
}

/* 使命部分 */
.mission {
    background: var(--bg-secondary);
    position: relative;
}

.mission::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(circle at 20% 30%, rgba(90, 139, 122, 0.05) 0%, transparent 50%);
    pointer-events: none;
}

.mission-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: start;
}

.mission-main {
    background: var(--gradient-card);
    padding: var(--space-2xl);
    border-radius: var(--radius-xl);
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-lg);
    backdrop-filter: blur(10px);
    position: relative;
    overflow: hidden;
    transition: var(--transition-smooth);
}

.mission-main:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}


.mission-text {
    font-size: 1.2rem;
    line-height: 1.8;
    color: var(--text-primary);
}

.mission-points {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.point-item {
    display: flex;
    gap: 1rem;
    align-items: flex-start;
}

.point-icon {
    flex-shrink: 0;
    width: 50px;
    height: 50px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.icon-circle {
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: var(--gradient-accent);
    box-shadow: 0 0 20px rgba(90, 139, 122, 0.3);
}

.point-content h3 {
    font-size: 1.2rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
}

.point-content p {
    color: var(--text-secondary);
    line-height: 1.6;
}

/* 愿景部分 */
.vision {
    background: var(--bg-primary);
    position: relative;
}

.vision::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(circle at 80% 70%, rgba(184, 122, 74, 0.05) 0%, transparent 50%);
    pointer-events: none;
}

.vision-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: start;
}

.vision-main {
    background: var(--gradient-card);
    padding: var(--space-2xl);
    border-radius: var(--radius-xl);
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-lg);
    backdrop-filter: blur(10px);
    position: relative;
    overflow: hidden;
    transition: var(--transition-smooth);
}

.vision-main:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}


.vision-text {
    font-size: 1.2rem;
    line-height: 1.8;
    color: var(--text-primary);
}

.vision-timeline {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.timeline-item {
    display: flex;
    gap: 1rem;
    align-items: flex-start;
}

.timeline-marker {
    flex-shrink: 0;
    width: 80px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gradient-warning);
    border-radius: 20px;
    box-shadow: var(--shadow-sm);
}

.marker-text {
    font-size: 0.9rem;
    font-weight: 600;
    color: white;
}

.timeline-content h3 {
    font-size: 1.2rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
}

.timeline-content p {
    color: var(--text-secondary);
    line-height: 1.6;
}

/* 关于我们部分 */
.about {
    background: var(--bg-secondary);
    position: relative;
}

.about::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(circle at 50% 50%, rgba(122, 139, 154, 0.05) 0%, transparent 50%);
    pointer-events: none;
}

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

.about-summary {
    text-align: center;
    margin-bottom: 3rem;
}

.summary-text {
    font-size: 1.2rem;
    line-height: 1.8;
    color: var(--text-primary);
    background: var(--gradient-card);
    padding: var(--space-2xl);
    border-radius: var(--radius-xl);
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-lg);
    backdrop-filter: blur(10px);
    position: relative;
    overflow: hidden;
    transition: var(--transition-smooth);
}

.summary-text:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}


.about-features {
    display: flex;
    justify-content: center;
    gap: 2rem;
    flex-wrap: wrap;
}

.feature-card {
    background: var(--gradient-card);
    padding: var(--space-2xl);
    border-radius: var(--radius-xl);
    border: 1px solid var(--border-color);
    text-align: center;
    transition: var(--transition-smooth);
    box-shadow: var(--shadow-md);
    backdrop-filter: blur(10px);
    flex: 1;
    min-width: 200px;
    max-width: 280px;
    position: relative;
    overflow: hidden;
}

.feature-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: var(--gradient-accent);
    opacity: 0.3;
}

.feature-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
    border-color: var(--border-color);
}

/* 为不同的特性卡片添加不同的悬停颜色 */
.feature-card:nth-child(1):hover {
    border-color: var(--border-color);
}

.feature-card:nth-child(2):hover {
    border-color: var(--border-color);
}

.feature-card:nth-child(3):hover {
    border-color: var(--border-color);
}

.feature-icon {
    width: 60px;
    height: 60px;
    margin: 0 auto 1rem;
    display: flex;
    align-items: center;
    justify-content: center;
}

.icon-hexagon {
    width: 30px;
    height: 30px;
    background: var(--gradient-accent);
    clip-path: polygon(50% 0%, 100% 25%, 100% 75%, 50% 100%, 0% 75%, 0% 25%);
    box-shadow: 0 0 20px rgba(90, 139, 122, 0.3);
}

.feature-card h3 {
    font-size: 1.2rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: var(--text-primary);
}

.feature-card p {
    color: var(--text-secondary);
    line-height: 1.6;
}

/* 页脚 */
.footer {
    background: var(--bg-tertiary);
    border-top: 1px solid var(--border-color);
    padding: 3rem 0 1rem;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
}

.footer-info h3 {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
}

.footer-info p {
    color: var(--text-secondary);
}

.footer-links {
    display: flex;
    gap: 2rem;
}

.footer-links a {
    color: var(--text-secondary);
    text-decoration: none;
    transition: var(--transition-fast);
}

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

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid var(--border-color);
}

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

.beian-info {
    margin-top: 0.5rem;
}

.beian-link {
    color: var(--text-muted);
    text-decoration: none;
    transition: var(--transition-fast);
    font-size: 0.85rem;
}

.beian-link:hover {
    color: var(--text-secondary);
    text-decoration: underline;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        left: -100%;
        top: 70px;
        flex-direction: column;
        background: var(--bg-secondary);
        width: 100%;
        text-align: center;
        transition: var(--transition-normal);
        box-shadow: var(--shadow-lg);
        padding: 2rem 0;
    }

    .nav-menu.active {
        left: 0;
    }

    .nav-toggle {
        display: flex;
    }

    .hero-container {
        grid-template-columns: 1fr;
        gap: 2rem;
        text-align: center;
    }

    /* 移动端隐藏九宫格 */
    .hero-visual {
        display: none;
    }

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

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

    .hero-cta {
        justify-content: center;
        flex-wrap: wrap;
    }

    .mission-content,
    .vision-content {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

    .footer-content {
        flex-direction: column;
        gap: 2rem;
        text-align: center;
    }

    .footer-links {
        justify-content: center;
    }

    .about-features {
        flex-direction: column;
        align-items: center;
    }
    
    .feature-card {
        max-width: 100%;
        width: 100%;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 15px;
    }

    .hero {
        padding: 2rem 0;
    }

    .title-main {
        font-size: 1.8rem;
    }

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

    .cta-button {
        padding: 10px 20px;
        font-size: 0.9rem;
    }
}

/* 滚动条样式 */
::-webkit-scrollbar {
    width: 6px;
}

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

::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: var(--radius-sm);
    border: 1px solid var(--bg-primary);
}

::-webkit-scrollbar-thumb:hover {
    background: var(--border-light);
}

/* 选择文本样式 */
::selection {
    background: var(--primary-200);
    color: var(--text-primary);
}