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

:root {
    /* 主色调 */
    --primary-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --secondary-gradient: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    --accent-gradient: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
    
    /* 颜色系统 */
    --primary-color: #667eea;
    --secondary-color: #764ba2;
    --accent-color: #4facfe;
    --success-color: #10b981;
    --warning-color: #f59e0b;
    --error-color: #ef4444;
    
    /* 文字颜色 */
    --text-primary: #1a202c;
    --text-secondary: #4a5568;
    --text-muted: #718096;
    --text-light: #a0aec0;
    
    /* 背景颜色 */
    --bg-primary: #ffffff;
    --bg-secondary: #f7fafc;
    --bg-tertiary: #edf2f7;
    --bg-glass: rgba(255, 255, 255, 0.1);
    --bg-glass-dark: rgba(0, 0, 0, 0.1);
    
    /* 边框和阴影 */
    --border-color: #e2e8f0;
    --border-glass: rgba(255, 255, 255, 0.2);
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.07);
    --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px rgba(0, 0, 0, 0.1);
    --shadow-glass: 0 8px 32px rgba(31, 38, 135, 0.37);
    
    /* 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;
    
    /* 动画 */
    --transition-fast: 0.15s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
    --easing-bounce: cubic-bezier(0.68, -0.55, 0.265, 1.55);
    
    /* 圆角 */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-2xl: 1.5rem;
    --radius-full: 9999px;
}

/* 深色主题 */
[data-theme="dark"] {
    --text-primary: #f7fafc;
    --text-secondary: #e2e8f0;
    --text-muted: #a0aec0;
    --text-light: #718096;
    
    --bg-primary: #1a202c;
    --bg-secondary: #2d3748;
    --bg-tertiary: #4a5568;
    --bg-glass: rgba(0, 0, 0, 0.2);
    --bg-glass-dark: rgba(255, 255, 255, 0.1);
    
    --border-color: #4a5568;
    --border-glass: rgba(255, 255, 255, 0.1);
}

/* 字体设置 */
html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', 'PingFang SC', 'Microsoft YaHei', sans-serif;
    font-weight: 400;
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--bg-primary);
    overflow-x: hidden;
    transition: background-color var(--transition-normal), color var(--transition-normal);
}

/* 页面加载动画 */
.page-loader {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
    opacity: 1;
    visibility: visible;
    transition: opacity 0.5s ease, visibility 0.5s ease;
}

.page-loader.fade-out {
    opacity: 0;
    visibility: hidden;
}

.loader-content {
    text-align: center;
    color: white;
}

.loader-icon {
    font-size: 3rem;
    margin-bottom: var(--space-md);
    animation: float 2s ease-in-out infinite;
}

.loader-text {
    font-size: 1.125rem;
    font-weight: 500;
    opacity: 0.9;
}

/* 粒子背景 */
#particles-js {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    opacity: 0.6;
}



/* 容器 */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-lg);
}

/* 通用元素样式 */
a {
    text-decoration: none;
    color: var(--primary-color);
    transition: all var(--transition-normal);
}

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

ul {
    list-style: none;
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}





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

.section-title {
    font-size: clamp(2rem, 5vw, 3.5rem);
    font-weight: 700;
    margin-bottom: var(--space-md);
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    position: relative;
}

.section-subtitle {
    font-size: 1.25rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
    line-height: 1.8;
}

/* 固定主题切换按钮 */
.theme-toggle-fixed {
    position: fixed;
    top: var(--space-xl);
    right: var(--space-xl);
    z-index: 1000;
}

.theme-toggle {
    width: 50px;
    height: 50px;
    background: var(--bg-glass);
    backdrop-filter: blur(20px);
    border: 1px solid var(--border-glass);
    padding: 0;
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all var(--transition-normal);
    box-shadow: var(--shadow-lg);
    font-size: 1.25rem;
    color: var(--text-primary);
}

.theme-toggle:hover {
    background: var(--bg-glass-dark);
    transform: scale(1.1);
    box-shadow: var(--shadow-xl);
}

/* 返回顶部按钮 */
.scroll-to-top {
    position: fixed;
    bottom: var(--space-xl);
    right: var(--space-xl);
    width: 50px;
    height: 50px;
    background: var(--primary-gradient);
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all var(--transition-normal);
    box-shadow: var(--shadow-lg);
    z-index: 1000;
    color: white;
    font-size: 1.25rem;
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    border: none;
    padding: 0;
}

.scroll-to-top.show {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.scroll-to-top:hover {
    transform: scale(1.1) translateY(-2px);
    box-shadow: var(--shadow-xl);
}

.logo {
    display: flex;
    align-items: center;
    gap: var(--space-md);
}

.logo-icon {
    width: 50px;
    height: 50px;
    background: var(--primary-gradient);
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1.5rem;
    box-shadow: var(--shadow-md);
}

.logo-text h1, .logo-text h3 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: var(--space-xs);
}

.logo-text p {
    font-size: 0.875rem;
    color: var(--text-muted);
}

/* 英雄区域 */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    position: relative;
    overflow: hidden;
    padding-top: var(--space-2xl);
}

.hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
}

.gradient-orb {
    position: absolute;
    border-radius: 50%;
    filter: blur(40px);
    opacity: 0.7;
    animation: float 6s ease-in-out infinite;
}

.orb-1 {
    width: 300px;
    height: 300px;
    background: var(--primary-gradient);
    top: 10%;
    left: 10%;
    animation-delay: 0s;
}

.orb-2 {
    width: 200px;
    height: 200px;
    background: var(--secondary-gradient);
    top: 60%;
    right: 20%;
    animation-delay: 2s;
}

.orb-3 {
    width: 150px;
    height: 150px;
    background: var(--accent-gradient);
    bottom: 20%;
    left: 60%;
    animation-delay: 4s;
}

.hero .container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-3xl);
    align-items: center;
}

.hero-content {
    z-index: 2;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-sm) var(--space-lg);
    background: var(--bg-glass);
    backdrop-filter: blur(10px);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-full);
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--primary-color);
    margin-bottom: var(--space-xl);
    animation: fadeInUp 1s ease;
}

.hero-title {
    font-size: clamp(2.5rem, 6vw, 4rem);
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: var(--space-lg);
    animation: fadeInUp 1s ease 0.2s both;
}

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

.hero-description {
    font-size: 1.25rem;
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: var(--space-2xl);
    animation: fadeInUp 1s ease 0.4s both;
}



.hero-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-xl);
    animation: fadeInUp 1s ease 0.8s both;
}

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

.stat-number {
    font-size: 2rem;
    font-weight: 700;
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: var(--space-xs);
}

.stat-label {
    font-size: 0.875rem;
    color: var(--text-muted);
    font-weight: 500;
}

/* 英雄区域视觉效果 */
.hero-visual {
    position: relative;
    height: 500px;
    animation: fadeInUp 1s ease 1s both;
}

.floating-card {
    position: absolute;
    width: 80px;
    height: 80px;
    background: var(--bg-glass);
    backdrop-filter: blur(20px);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-lg);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: var(--space-xs);
    font-size: 1.5rem;
    color: var(--primary-color);
    box-shadow: var(--shadow-glass);
    animation: float 3s ease-in-out infinite;
}

.floating-card span {
    font-size: 0.75rem;
    font-weight: 500;
}

.card-1 {
    top: 20%;
    left: 10%;
    animation-delay: 0s;
}

.card-2 {
    top: 10%;
    right: 20%;
    animation-delay: 1s;
}

.card-3 {
    top: 60%;
    left: 5%;
    animation-delay: 2s;
}

.hero-mockup {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 300px;
    height: 200px;
}

.mockup-screen {
    width: 100%;
    height: 100%;
    background: var(--bg-glass);
    backdrop-filter: blur(20px);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-glass);
    overflow: hidden;
}

.mockup-header {
    height: 30px;
    background: var(--bg-glass-dark);
    display: flex;
    align-items: center;
    padding: 0 var(--space-md);
}

.mockup-dots {
    display: flex;
    gap: var(--space-xs);
}

.mockup-dots span {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--text-muted);
}

.mockup-content {
    height: calc(100% - 30px);
    display: flex;
    align-items: center;
    justify-content: center;
}

.upload-animation {
    font-size: 3rem;
    color: var(--primary-color);
    animation: pulse 2s ease-in-out infinite;
}



/* 页脚 */
footer {
    background: var(--bg-secondary);
    padding: var(--space-3xl) 0 var(--space-xl);
    border-top: 1px solid var(--border-color);
}

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

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

.footer-description {
    margin-top: var(--space-md);
}

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

.footer-contact h4 {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--space-lg);
    position: relative;
}

.footer-contact h4::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 30px;
    height: 2px;
    background: var(--primary-gradient);
    border-radius: var(--radius-sm);
}

.tech-stack {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-md);
}

.tech-item {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-sm) var(--space-md);
    background: var(--bg-glass);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-md);
    transition: all var(--transition-normal);
}

.tech-item:hover {
    background: var(--bg-glass-dark);
    transform: translateY(-2px);
}

.tech-item i {
    color: var(--primary-color);
    font-size: 1.25rem;
}

.tech-item span {
    color: var(--text-secondary);
    font-size: 0.875rem;
    font-weight: 500;
}

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

.copyright,
.motto {
    color: var(--text-muted);
    font-size: 0.875rem;
}

.motto {
    font-style: italic;
    color: var(--text-muted);
    font-weight: 500;
    font-size: 0.875rem;
    transition: color var(--transition-normal);
}

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

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

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

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

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

@keyframes shimmer {
    0% {
        left: -100%;
    }
    100% {
        left: 100%;
    }
}



/* 响应式设计 */
@media (max-width: 1024px) {
    .hero .container {
        grid-template-columns: 1fr;
        gap: var(--space-2xl);
        text-align: center;
    }
    
    .hero-content {
        order: 1;
    }
    
    .hero-image {
        order: 2;
    }
}

@media (max-width: 768px) {
    .container {
        padding: 0 var(--space-md);
    }
    
    .theme-toggle-fixed {
        top: var(--space-lg);
        right: var(--space-lg);
    }
    
    .theme-toggle {
        width: 45px;
        height: 45px;
        font-size: 1.125rem;
    }
    
    .hero {
        padding-top: var(--space-xl);
    }
    
    .hero-stats {
        grid-template-columns: 1fr;
        gap: var(--space-lg);
    }
    

    
    .tech-stack {
        grid-template-columns: 1fr;
    }
    
    .scroll-to-top {
        bottom: var(--space-lg);
        right: var(--space-lg);
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        gap: var(--space-2xl);
        text-align: center;
    }
    
    .footer-bottom {
        flex-direction: column;
        gap: var(--space-md);
        text-align: center;
    }
}

@media (max-width: 480px) {
    .theme-toggle-fixed {
        top: var(--space-md);
        right: var(--space-md);
    }
    
    .theme-toggle {
        width: 40px;
        height: 40px;
        font-size: 1rem;
    }
    
    .hero-visual {
        height: 300px;
    }
    
    .floating-card {
        width: 60px;
        height: 60px;
        font-size: 1.25rem;
    }
    
    .floating-card span {
        font-size: 0.625rem;
    }
    
    .hero-mockup {
        width: 250px;
        height: 150px;
    }
    
    .btn {
        padding: var(--space-sm) var(--space-lg);
        font-size: 0.875rem;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .section-subtitle {
        font-size: 1rem;
    }
    
    .tech-stack {
        grid-template-columns: 1fr;
        gap: var(--space-sm);
    }
    
    .tech-item {
        padding: var(--space-xs) var(--space-sm);
    }
    
    .tech-item i {
        font-size: 1rem;
    }
    
    .tech-item span {
        font-size: 0.8rem;
    }
    
    .scroll-to-top {
        bottom: var(--space-md);
        right: var(--space-md);
        width: 45px;
        height: 45px;
        font-size: 1.125rem;
    }
} 

.footer-bottom {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    align-items: center;
    justify-content: center;
    padding-top: 1rem;
    font-size: 0.85rem;
    color: #999;
}

.footer-bottom a.beian-link {
    display: inline-flex;
    align-items: center;
    color: #999;
    text-decoration: none;
    transition: color 0.3s ease;
}

.footer-bottom a.beian-link:hover {
    color: #3989fa;
}

.footer-bottom a.beian-link img {
    height: 16px;
    margin-right: 4px;
    vertical-align: middle;
}