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

/* 媒体查询变量和主题色彩系统 */
:root {
    /* 字体大小 - 响应式调整 */
    --font-size-logo: clamp(2.2rem, 5vw, 3.5rem);
    --font-size-tagline: clamp(1rem, 2vw, 1.25rem);
    --font-size-status: clamp(1.2rem, 3vw, 1.5rem);
    --font-size-description: clamp(0.9rem, 1.5vw, 1rem);
    --font-size-footer: clamp(0.8rem, 1.5vw, 0.9rem);
    
    /* 间距系统 */
    --padding-container: clamp(1rem, 4vw, 2rem);
    --padding-construction: clamp(1.5rem, 6vw, 3rem);
    --padding-description: clamp(0.8rem, 2vw, 1rem);
    --border-radius: clamp(10px, 3vw, 16px);
    --border-radius-sm: clamp(6px, 2vw, 8px);
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-xxl: 3rem;
    
    /* 动画时间 */
    --animation-duration: 0.6s;
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
    
    /* 主题色彩系统 */
    --color-primary: #2d7ee7;
    --color-primary-light: #4a95f5;
    --color-primary-dark: #1c5cb9;
    --color-secondary: #4fd1c5;
    --color-secondary-light: #78e8df;
    --color-secondary-dark: #38a89f;
    --color-accent: #6a5acd;
    --color-accent-light: #847ab8;
    --color-accent-dark: #534a9e;
    
    /* 背景色彩 */
    --color-bg-primary: #0a1014;
    --color-bg-secondary: #111827;
    --color-bg-card: rgba(22, 30, 45, 0.85);
    --color-bg-card-hover: rgba(22, 30, 45, 0.95);
    --color-bg-grid: rgba(25, 34, 51, 0.1);
    --color-bg-glow-1: rgba(45, 126, 231, 0.2);
    --color-bg-glow-2: rgba(64, 224, 208, 0.2);
    
    /* 文本色彩 */
    --color-text-primary: #f3f4f6;
    --color-text-secondary: #e5e7eb;
    --color-text-tertiary: #cbd5e1;
    --color-text-muted: #94a3b8;
    --color-text-disabled: #64748b;
    
    /* 功能色彩 */
    --color-success: #22c55e;
    --color-warning: #f59e0b;
    --color-error: #ef4444;
    --color-info: #3b82f6;
    
    /* 边框色彩 */
    --color-border-light: rgba(45, 126, 231, 0.2);
    --color-border-medium: rgba(45, 126, 231, 0.4);
    --color-border-dark: rgba(45, 126, 231, 0.6);
    
    /* 阴影色彩 */
    --color-shadow: rgba(0, 0, 0, 0.3);
    --color-glow: rgba(45, 126, 231, 0.15);
    
    /* 排版系统 */
    --font-family-primary: 'Segoe UI', 'SF Pro Display', -apple-system, BlinkMacSystemFont, 'Microsoft YaHei', Arial, sans-serif;
    --font-family-mono: 'SF Mono', Monaco, 'Cascadia Code', 'Roboto Mono', Consolas, 'Courier New', monospace;
    --font-weight-light: 300;
    --font-weight-regular: 400;
    --font-weight-medium: 500;
    --font-weight-semibold: 600;
    --font-weight-bold: 700;
    --line-height-tight: 1.2;
    --line-height-normal: 1.5;
    --line-height-relaxed: 1.7;
    
    /* 渐变定义 */
    --gradient-primary: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
    --gradient-secondary: linear-gradient(135deg, var(--color-secondary), var(--color-accent));
    --gradient-accent: linear-gradient(135deg, var(--color-accent), var(--color-primary));
    --gradient-border: linear-gradient(45deg, var(--color-primary), var(--color-secondary), var(--color-accent), var(--color-primary));
    --gradient-text: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
    --gradient-shine: linear-gradient(90deg, transparent, rgba(45, 126, 231, 0.1), transparent);
}

body {
    font-family: var(--font-family-primary);
    background-color: var(--color-bg-primary);
    background-image: 
        radial-gradient(circle at 10% 20%, var(--color-bg-glow-1) 0%, transparent 20%),
        radial-gradient(circle at 80% 70%, var(--color-bg-glow-1) 0%, transparent 30%),
        linear-gradient(135deg, var(--color-bg-primary) 0%, var(--color-bg-secondary) 100%);
    color: var(--color-text-secondary);
    line-height: var(--line-height-normal);
    -webkit-text-size-adjust: 100%;
    -ms-text-size-adjust: 100%;
    text-size-adjust: 100%;
    cursor: default;
    transition: background-color var(--transition-slow);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* 网格背景 - 添加动画效果 */
body::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: linear-gradient(var(--color-bg-grid) 1px, transparent 1px),
                      linear-gradient(90deg, var(--color-bg-grid) 1px, transparent 1px);
    background-size: clamp(20px, 5vw, 30px) clamp(20px, 5vw, 30px);
    background-position: -1px -1px;
    pointer-events: none;
    z-index: 0;
    animation: gridMove 20s linear infinite;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--padding-container);
    position: relative;
    z-index: 1;
}

/* 导航栏样式 */
.navbar {
    background-color: rgba(22, 30, 45, 0.8);
    color: white;
    padding: 1rem 0;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
    backdrop-filter: blur(12px);
}

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

.logo {
    font-size: var(--font-size-logo);
    font-weight: var(--font-weight-bold);
    background: var(--gradient-text);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    letter-spacing: -0.03em;
    text-shadow: 0 0 20px rgba(45, 126, 231, 0.3);
    font-family: var(--font-family-mono);
}

.nav-links {
    display: flex;
    list-style: none;
}

.nav-links li {
    margin-left: 1.5rem;
}

.nav-links a {
    color: white;
    text-decoration: none;
    padding: 0.5rem 1rem;
    border-radius: 4px;
    transition: all var(--transition-normal);
}

.nav-links a:hover,
.nav-links a.active {
    background-color: rgba(45, 126, 231, 0.2);
    color: var(--color-primary);
}

/* 首页容器 */
.home-container {
    text-align: center;
    padding: var(--padding-container);
    position: relative;
    z-index: 1;
    width: 100%;
    max-width: 600px;
    margin: 0 auto;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    animation: fadeInUp 0.8s ease-out forwards;
}

.construction {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border-light);
    border-radius: var(--border-radius);
    padding: var(--padding-construction);
    backdrop-filter: blur(12px);
    box-shadow: 
        0 8px 32px var(--color-shadow),
        0 0 0 1px var(--color-border-light),
        0 0 60px var(--color-glow) inset;
    position: relative;
    transition: all var(--transition-normal);
    margin: 0 auto;
    width: 100%;
    max-width: 500px;
    overflow: hidden;
}

.construction:hover {
    transform: translateY(-5px);
    background: var(--color-bg-card-hover);
    box-shadow: 
        0 12px 40px var(--color-shadow),
        0 0 0 1px var(--color-border-medium),
        0 0 80px var(--color-glow) inset;
}

.construction::after {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: var(--gradient-shine);
    transition: left var(--transition-slow);
}

.construction:hover::after {
    left: 100%;
}

/* 边框效果 */
.construction::before {
    content: '';
    position: absolute;
    top: -2px;
    left: -2px;
    right: -2px;
    bottom: -2px;
    background: var(--gradient-border);
    z-index: -1;
    border-radius: calc(var(--border-radius) + 2px);
    opacity: 0;
    animation: borderGlow 3s ease-in-out infinite;
    background-size: 400% 400%;
}

.tagline {
    font-size: var(--font-size-tagline);
    color: var(--color-text-muted);
    margin-bottom: var(--spacing-xl);
    font-style: italic;
    display: block;
    animation: fadeIn 1s ease-out 0.2s both;
    position: relative;
    overflow: hidden;
    font-weight: var(--font-weight-light);
    letter-spacing: 0.02em;
}

.tagline::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--color-primary), transparent);
    transform: scaleX(0);
    transition: transform var(--transition-slow);
}

.tagline:hover::after {
    transform: scaleX(1);
}

.status {
    font-size: var(--font-size-status);
    font-weight: var(--font-weight-semibold);
    color: var(--color-primary);
    margin-bottom: var(--spacing-lg);
    text-shadow: 0 0 10px rgba(45, 126, 231, 0.2);
    display: inline-block;
    position: relative;
    word-break: keep-all;
    animation: fadeIn 1s ease-out 0.4s both;
    letter-spacing: 0.01em;
}

.status::after {
    content: '●';
    color: var(--color-success);
    margin-left: 10px;
    font-size: 0.75em;
    animation: pulse 2s ease-in-out infinite;
    vertical-align: middle;
}

.description {
    font-size: var(--font-size-description);
    color: var(--color-text-tertiary);
    line-height: var(--line-height-relaxed);
    margin-bottom: var(--spacing-xl);
    max-width: 450px;
    margin-left: auto;
    margin-right: auto;
    text-align: center;
    animation: fadeIn 1s ease-out 0.6s both;
    position: relative;
    z-index: 1;
    padding: var(--padding-description);
    background: rgba(22, 30, 45, 0.5);
    border-radius: var(--border-radius-sm);
    transition: all var(--transition-normal);
    font-weight: var(--font-weight-regular);
    letter-spacing: 0.01em;
}

.description:hover {
    background: rgba(22, 30, 45, 0.8);
    transform: translateY(-2px);
}

footer {
    margin-top: var(--spacing-xxl);
    color: var(--color-text-disabled);
    font-size: var(--font-size-footer);
    position: relative;
    z-index: 1;
    width: 100%;
    max-width: 500px;
    margin-left: auto;
    margin-right: auto;
    animation: fadeInUp 1s ease-out 0.8s both;
    line-height: var(--line-height-tight);
    letter-spacing: 0.01em;
}

.icp-link {
    color: var(--color-text-muted);
    text-decoration: none;
    transition: all var(--transition-normal);
    padding: 4px 8px;
    border-radius: var(--border-radius-sm);
    display: inline-block;
    word-break: break-all;
    position: relative;
    overflow: hidden;
    font-size: calc(var(--font-size-footer) * 0.95);
}

.icp-link:hover {
    color: var(--color-primary);
    background: rgba(45, 126, 231, 0.1);
    text-decoration: none;
    transform: translateY(-2px);
}

.icp-link::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(45, 126, 231, 0.3), transparent);
    transition: left var(--transition-slow);
}

.icp-link:hover::before {
    left: 100%;
}

.links {
    margin-top: var(--spacing-lg);
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: var(--spacing-md);
    align-items: center;
    width: 100%;
}

.link-item {
    display: inline-block;
    flex: 0 0 auto;
}

footer p {
    margin-top: var(--spacing-md);
    font-weight: var(--font-weight-light);
}

/* 装饰元素 - 增强动画效果 */
.tech-decoration {
    position: absolute;
    z-index: 0;
    pointer-events: none;
    opacity: 0;
    animation: fadeInFloat 1.5s ease-out forwards;
}

.dec-1 {
    top: 10%;
    left: 5%;
    width: clamp(80px, 20vw, 150px);
    height: clamp(80px, 20vw, 150px);
    background: radial-gradient(circle, var(--color-bg-glow-1) 0%, transparent 70%);
    filter: blur(20px);
    animation-delay: 0.2s;
}

.dec-2 {
    bottom: 10%;
    right: 5%;
    width: clamp(100px, 25vw, 200px);
    height: clamp(100px, 25vw, 200px);
    background: radial-gradient(circle, var(--color-bg-glow-2) 0%, transparent 70%);
    filter: blur(20px);
    animation-delay: 0.4s;
}

/* 学习模块样式 */
.modules {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    margin-top: 1.5rem;
}

.module {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 8px;
    padding: 1.5rem;
    transition: all 0.3s ease;
}

.module:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.2);
    border-color: rgba(45, 126, 231, 0.5);
}

.module h3 {
    color: var(--color-primary);
    margin-bottom: 0.5rem;
}

.module p {
    color: var(--color-text-tertiary);
    margin-bottom: 1rem;
    line-height: 1.6;
}

/* 按钮样式 */
.btn {
    display: inline-block;
    background: var(--gradient-primary);
    color: white;
    padding: 0.5rem 1rem;
    border-radius: 4px;
    text-decoration: none;
    font-weight: 500;
    transition: all 0.3s ease;
    border: none;
    cursor: pointer;
}

.btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(45, 126, 231, 0.4);
}

.btn-small {
    padding: 0.5rem 1rem;
    font-size: 0.9rem;
}

/* 页面头部 */
.page-header {
    text-align: center;
    padding: 3rem 0;
    margin-bottom: 2rem;
}

.page-header h1 {
    font-size: 2.5rem;
    color: var(--color-text-primary);
    margin-bottom: 1rem;
}

.page-header p {
    font-size: 1.2rem;
    color: var(--color-text-muted);
    max-width: 800px;
    margin: 0 auto;
}

/* 内容区域 */
.content-section {
    background: var(--color-bg-card);
    padding: 2rem;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    margin-bottom: 2rem;
    backdrop-filter: blur(12px);
}

.content-section h2 {
    color: var(--color-primary);
    margin: 2rem 0 1rem 0;
}

.content-section ul {
    padding-left: 1.5rem;
    margin: 1rem 0;
}

.content-section li {
    margin-bottom: 0.5rem;
}

/* 模式分类 */
.category {
    margin-bottom: 3rem;
}

.category h2 {
    color: var(--color-primary);
    margin-bottom: 1.5rem;
    padding-bottom: 0.5rem;
    border-bottom: 2px solid var(--color-border-light);
}

.pattern-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 1.5rem;
}

.pattern-card {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 8px;
    padding: 1.5rem;
    transition: all 0.3s ease;
}

.pattern-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.2);
    border-color: rgba(45, 126, 231, 0.5);
}

.pattern-card h3 {
    color: var(--color-primary);
    margin-bottom: 0.5rem;
}

.pattern-card p {
    color: var(--color-text-tertiary);
    margin-bottom: 1rem;
    line-height: 1.6;
}

/* 代码示例 */
.code-example {
    margin: 2rem 0;
}

.code-example h3 {
    color: var(--color-primary);
    margin-bottom: 1rem;
}

pre {
    background-color: rgba(0, 0, 0, 0.5);
    color: #ecf0f1;
    padding: 1.5rem;
    border-radius: 4px;
    overflow-x: auto;
    margin-bottom: 1rem;
    border: 1px solid rgba(255, 255, 255, 0.1);
}

/* 优缺点对比 */
.pros-cons {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin: 2rem 0;
}

.pros-cons h3 {
    margin-bottom: 1rem;
}

.pros {
    background-color: rgba(34, 197, 94, 0.1);
    padding: 1.5rem;
    border-radius: 4px;
    border: 1px solid rgba(34, 197, 94, 0.2);
}

.cons {
    background-color: rgba(239, 68, 68, 0.1);
    padding: 1.5rem;
    border-radius: 4px;
    border: 1px solid rgba(239, 68, 68, 0.2);
}

/* 图表容器 */
.diagram-container {
    background: rgba(255, 255, 255, 0.05);
    padding: 1.5rem;
    border-radius: 4px;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
    margin: 2rem 0;
    overflow-x: auto;
    border: 1px solid rgba(255, 255, 255, 0.1);
}

/* 动画定义 */
@keyframes gridMove {
    0% {
        background-position: 0 0;
    }
    100% {
        background-position: 50px 50px;
    }
}

@keyframes borderGlow {
    0% {
        opacity: 0.3;
        background-position: 0% 50%;
    }
    50% {
        opacity: 0.8;
        background-position: 100% 50%;
    }
    100% {
        opacity: 0.3;
        background-position: 0% 50%;
    }
}

@keyframes textGlow {
    0% {
        text-shadow: 0 0 10px rgba(45, 126, 231, 0.3), 0 0 20px rgba(45, 126, 231, 0.2);
        background-position: 0% 50%;
    }
    100% {
        text-shadow: 0 0 20px rgba(45, 126, 231, 0.5), 0 0 40px rgba(45, 126, 231, 0.3);
        background-position: 100% 50%;
    }
}

@keyframes pulse {
    0%, 100% {
        opacity: 0.6;
        transform: scale(1);
    }
    50% {
        opacity: 1;
        transform: scale(1.2);
    }
}

@keyframes fadeInFloat {
    0% {
        opacity: 0;
        transform: translateY(20px) scale(0.8);
    }
    70% {
        opacity: 0.8;
        transform: translateY(-10px) scale(1.1);
    }
    100% {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

@keyframes float {
    0%, 100% {
        transform: translateY(0) rotate(0deg);
    }
    50% {
        transform: translateY(-20px) rotate(5deg);
    }
}

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

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* 响应式设计断点 */
@media (max-width: 768px) {
    .construction {
        margin: 0;
        box-shadow: 
            0 4px 20px var(--color-shadow),
            0 0 0 1px var(--color-border-light),
            0 0 40px var(--color-glow) inset;
    }
    
    .construction:hover {
        transform: translateY(-3px);
    }
    
    .links {
        flex-direction: column;
        gap: var(--spacing-md);
        align-items: center;
    }
    
    .link-item {
        width: 100%;
        text-align: center;
    }
    
    .icp-link {
        display: inline-block;
        width: auto;
        max-width: 100%;
    }
    
    .navbar .container {
        flex-direction: column;
    }
    
    .nav-links {
        margin-top: 1rem;
    }
    
    .nav-links li {
        margin: 0 0.5rem;
    }
    
    .pattern-grid {
        grid-template-columns: 1fr;
    }
    
    .pros-cons {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    body {
        padding: 0;
        min-height: 100vh;
    }
    
    .home-container {
        min-height: 100vh;
        display: flex;
        flex-direction: column;
        justify-content: center;
        padding: var(--padding-container);
    }
    
    .construction {
        padding: calc(var(--padding-construction) - 0.5rem);
        margin: 0;
    }
    
    .description {
        font-size: var(--font-size-description);
        line-height: var(--line-height-relaxed);
        margin-bottom: var(--spacing-lg);
        padding: var(--padding-description);
    }
    
    footer {
        margin-top: var(--spacing-xl);
        padding-bottom: var(--spacing-md);
    }
}

@media (max-width: 360px) {
    .status::after {
        margin-left: 6px;
    }
    
    .links {
        gap: var(--spacing-sm);
    }
}

/* 横屏模式优化 */
@media (max-height: 480px) and (orientation: landscape) {
    body {
        min-height: 100vh;
    }
    
    .home-container {
        padding: var(--spacing-md);
        min-height: 100vh;
    }
    
    .construction {
        padding: var(--spacing-lg);
        margin: var(--spacing-md) 0;
    }
    
    footer {
        margin-top: var(--spacing-lg);
    }
}

/* 打印样式 */
@media print {
    body {
        background: white;
        color: black;
    }
    
    .construction {
        box-shadow: none;
        border: 1px solid #ccc;
        background: white;
    }
    
    .tech-decoration {
        display: none;
    }
    
    body::before {
        display: none;
    }
    
    .logo {
        color: var(--color-primary);
        background: none;
        -webkit-background-clip: text;
        background-clip: text;
    }
}

/* 高对比度模式适配 */
@media (prefers-contrast: high) {
    .construction {
        background: rgba(0, 0, 0, 0.9);
        border: 1px solid var(--color-primary);
    }
    
    .logo {
        color: var(--color-primary);
    }
    
    .tagline, .description {
        color: var(--color-text-primary);
    }
}

/* 减少动画模式适配 */
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
    
    body::before {
        animation: none !important;
    }
}