/* Apple 风格设计系统 */
:root {
    /* 颜色系统 - 提升可读性 */
    --color-background: #0a0a0f;
    --color-surface: rgba(28, 28, 35, 0.6);
    --color-surface-elevated: rgba(40, 40, 50, 0.8);
    --color-text-primary: #ffffff;
    --color-text-secondary: rgba(255, 255, 255, 0.75);
    --color-text-tertiary: rgba(255, 255, 255, 0.5);
    --color-accent: #0071e3;
    --color-accent-hover: #0077ed;
    --color-link: #5ac8fa;
    --color-border: rgba(255, 255, 255, 0.1);
    
    /* 字体 */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    
    /* 间距 */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-xxl: 5rem;
    
    /* 圆角 */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 18px;
    --radius-xl: 28px;
    
    /* 过渡 */
    --transition-fast: 0.2s ease;
    --transition-medium: 0.3s ease;
    --transition-slow: 0.5s ease;
    
    /* 导航栏高度 */
    --nav-height: 48px;
}

/* 重置和基础样式 */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    background: 
        radial-gradient(ellipse 80% 60% at 50% -10%, rgba(102, 126, 234, 0.12) 0%, transparent 60%),
        radial-gradient(ellipse 60% 40% at 90% 30%, rgba(118, 75, 162, 0.08) 0%, transparent 50%),
        radial-gradient(ellipse 50% 30% at 10% 70%, rgba(79, 172, 254, 0.06) 0%, transparent 50%),
        var(--color-background);
    background-attachment: fixed;
    color: var(--color-text-primary);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden;
}

a {
    color: inherit;
    text-decoration: none;
}

button {
    font-family: inherit;
    cursor: pointer;
    border: none;
    background: none;
    color: inherit;
}

ul {
    list-style: none;
}

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

/* 导航栏 - iOS 26 风格毛玻璃 */
.nav {
    position: fixed;
    top: 12px;
    left: 50%;
    transform: translateX(-50%);
    height: 44px;
    background: rgba(255, 255, 255, 0.12);
    backdrop-filter: saturate(200%) blur(25px);
    -webkit-backdrop-filter: saturate(200%) blur(25px);
    z-index: 9999;
    border-radius: 9999px;
    border: 1px solid rgba(255, 255, 255, 0.15);
    box-shadow: 
        0 4px 30px rgba(0, 0, 0, 0.1),
        inset 0 1px 0 rgba(255, 255, 255, 0.1);
    width: auto;
    min-width: 600px;
    max-width: 800px;
    padding: 0 8px;
}

.nav-container {
    height: 100%;
    width: 100%;
    padding: 0 16px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
}

.nav-logo {
    font-size: 1.25rem;
    font-weight: 600;
    letter-spacing: -0.02em;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 8px;
}

.nav-links a {
    font-size: 0.8125rem;
    font-weight: 500;
    color: rgba(255, 255, 255, 0.85);
    transition: all var(--transition-fast);
    letter-spacing: -0.01em;
    padding: 6px 12px;
    border-radius: 9999px;
}

.nav-links a:hover {
    color: #ffffff;
    background: rgba(255, 255, 255, 0.1);
}

.nav-actions {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.nav-icon {
    color: rgba(255, 255, 255, 0.85);
    transition: all var(--transition-fast);
    display: flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    border-radius: 50%;
}

.nav-icon:hover {
    color: #ffffff;
    background: rgba(255, 255, 255, 0.1);
}

.nav-menu-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    padding: 5px;
}

.nav-menu-toggle span {
    width: 18px;
    height: 1.5px;
    background: var(--color-text-secondary);
    transition: all var(--transition-fast);
}

/* Hero 区域 */
.hero {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: calc(var(--nav-height) + var(--spacing-xxl)) var(--spacing-lg) var(--spacing-xxl);
    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(120, 119, 198, 0.3), transparent),
        radial-gradient(ellipse 60% 40% at 80% 60%, rgba(102, 126, 234, 0.15), transparent),
        radial-gradient(ellipse 50% 30% at 20% 80%, rgba(118, 75, 162, 0.1), transparent);
    pointer-events: none;
}

.hero-content {
    position: relative;
    z-index: 1;
    max-width: 800px;
    animation: fadeInUp 1s ease-out;
}

.hero-title {
    font-size: clamp(3rem, 8vw, 6rem);
    font-weight: 700;
    letter-spacing: -0.03em;
    line-height: 1.1;
    margin-bottom: var(--spacing-md);
}

.gradient-text {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 25%, #f093fb 50%, #f5576c 75%, #4facfe 100%);
    background-size: 200% 200%;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: gradientShift 8s ease infinite;
}

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

.hero-subtitle {
    font-size: clamp(1.25rem, 3vw, 1.75rem);
    font-weight: 400;
    color: var(--color-text-primary);
    margin-bottom: var(--spacing-sm);
    letter-spacing: -0.01em;
}

.hero-description {
    font-size: clamp(1rem, 2vw, 1.25rem);
    font-weight: 400;
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-xl);
}

.hero-buttons {
    display: flex;
    gap: var(--spacing-md);
    justify-content: center;
    flex-wrap: wrap;
}

/* 按钮样式 - Apple 风格 */
.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: 0.75rem 1.5rem;
    font-size: 0.875rem;
    font-weight: 500;
    border-radius: 980px;
    transition: all var(--transition-fast);
    letter-spacing: -0.01em;
}

.btn-primary {
    background: var(--color-accent);
    color: white;
}

.btn-primary:hover {
    background: var(--color-accent-hover);
    transform: scale(1.02);
}

.btn-secondary {
    background: transparent;
    color: var(--color-link);
    border: 1px solid var(--color-border);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.05);
}

.btn-large {
    padding: 1rem 2rem;
    font-size: 1rem;
}

/* 滚动指示器 */
.hero-scroll-indicator {
    position: absolute;
    bottom: var(--spacing-xl);
    left: 50%;
    transform: translateX(-50%);
    animation: bounce 2s infinite;
}

.scroll-arrow {
    width: 20px;
    height: 20px;
    border-right: 2px solid var(--color-text-tertiary);
    border-bottom: 2px solid var(--color-text-tertiary);
    transform: rotate(45deg);
}

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

/* 通用区块样式 */
section {
    padding: var(--spacing-xxl) var(--spacing-lg);
}

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

.section-title {
    font-size: clamp(2rem, 5vw, 3rem);
    font-weight: 600;
    letter-spacing: -0.02em;
    margin-bottom: var(--spacing-sm);
}

.section-subtitle {
    font-size: 1.125rem;
    color: var(--color-text-secondary);
    font-weight: 400;
}

/* 插件展示区域 - 白色背景 */
.plugins {
    background: #ffffff;
}

.plugins .section-title {
    color: #1d1d1f;
}

.plugins .section-subtitle {
    color: rgba(0, 0, 0, 0.6);
}

.plugin-card {
    background: rgba(255, 255, 255, 0.9);
    border: 1px solid rgba(0, 0, 0, 0.08);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.06);
}

.plugin-card:hover {
    border-color: rgba(0, 0, 0, 0.12);
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.1);
}

.plugin-card::before {
    background: linear-gradient(90deg, transparent, rgba(0, 0, 0, 0.06), transparent);
}

.plugin-name {
    color: #1d1d1f;
}

.plugin-description {
    color: rgba(0, 0, 0, 0.6);
}

.plugin-link {
    color: #0071e3;
}

.plugins-grid {
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: var(--spacing-lg);
}

.plugin-card {
    background: var(--color-surface);
    border-radius: var(--radius-xl);
    padding: var(--spacing-xl);
    transition: all var(--transition-medium);
    border: 1px solid transparent;
    position: relative;
    overflow: hidden;
}

.plugin-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.1), transparent);
}

.plugin-card:hover {
    transform: translateY(-4px);
    border-color: var(--color-border);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.4);
}

.plugin-icon {
    width: 64px;
    height: 64px;
    margin-bottom: var(--spacing-md);
}

.plugin-icon svg {
    width: 100%;
    height: 100%;
}

.plugin-name {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
    letter-spacing: -0.01em;
}

.plugin-description {
    font-size: 0.9375rem;
    color: var(--color-text-secondary);
    line-height: 1.6;
    margin-bottom: var(--spacing-md);
}

.plugin-tags {
    display: flex;
    gap: var(--spacing-xs);
    margin-bottom: var(--spacing-md);
    flex-wrap: wrap;
}

.tag {
    font-size: 0.75rem;
    font-weight: 500;
    padding: 0.25rem 0.75rem;
    background: var(--color-surface-elevated);
    border-radius: 100px;
    color: var(--color-text-secondary);
}

.plugin-link {
    display: inline-flex;
    align-items: center;
    gap: 0.25rem;
    font-size: 0.9375rem;
    color: var(--color-link);
    transition: gap var(--transition-fast);
}

.plugin-link:hover {
    gap: 0.5rem;
}

.plugin-link svg {
    transition: transform var(--transition-fast);
}

.plugin-link:hover svg {
    transform: translateX(2px);
}

/* 特性展示 - 白色背景 */
.features {
    background: #ffffff;
    position: relative;
}

.features .section-title {
    color: #1d1d1f;
}

.feature-item h3 {
    color: #1d1d1f;
}

.feature-item p {
    color: rgba(0, 0, 0, 0.6);
}

.features-grid {
    max-width: 1000px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: var(--spacing-xl);
}

.feature-item {
    text-align: center;
    padding: var(--spacing-lg);
}

.feature-icon {
    width: 48px;
    height: 48px;
    margin: 0 auto var(--spacing-md);
}

.feature-item h3 {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
}

.feature-item p {
    font-size: 0.875rem;
    color: var(--color-text-secondary);
    line-height: 1.5;
}

/* CTA 区域 - 白色背景 */
.cta {
    background: #ffffff;
    text-align: center;
    padding: var(--spacing-xxl) var(--spacing-lg);
}

.cta-content {
    max-width: 600px;
    margin: 0 auto;
}

.cta h2 {
    font-size: clamp(2rem, 5vw, 3rem);
    font-weight: 600;
    letter-spacing: -0.02em;
    margin-bottom: var(--spacing-sm);
    color: #1d1d1f;
}

.cta p {
    font-size: 1.125rem;
    color: rgba(0, 0, 0, 0.6);
    margin-bottom: var(--spacing-xl);
}

/* 页脚 - 简洁设计 */
.footer {
    background: #0a0a0f;
    padding: 60px var(--spacing-lg) 32px;
    border-top: 1px solid rgba(255, 255, 255, 0.06);
}

.footer-content {
    max-width: 900px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 32px;
}

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

.footer-logo {
    font-size: 1.5rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.footer-desc {
    font-size: 0.875rem;
    color: rgba(255, 255, 255, 0.5);
    margin-top: 8px;
}

.footer-plugins {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 8px 24px;
}

.footer-plugins a {
    font-size: 0.8125rem;
    color: rgba(255, 255, 255, 0.6);
    transition: color var(--transition-fast);
}

.footer-plugins a:hover {
    color: #ffffff;
}

.footer-qq {
    display: flex;
    justify-content: center;
}

.qq-link {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.875rem;
    color: rgba(255, 255, 255, 0.6);
    transition: color var(--transition-fast);
    padding: 8px 16px;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 9999px;
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.qq-link:hover {
    color: #ffffff;
    background: rgba(255, 255, 255, 0.1);
    border-color: rgba(255, 255, 255, 0.15);
}

.footer-bottom {
    display: flex;
    align-items: center;
    gap: 12px;
    padding-top: 24px;
    border-top: 1px solid rgba(255, 255, 255, 0.06);
    width: 100%;
    justify-content: center;
}

.footer-bottom span {
    font-size: 0.8125rem;
    color: rgba(255, 255, 255, 0.4);
}

.footer-github {
    color: rgba(255, 255, 255, 0.4);
    transition: color var(--transition-fast);
    display: flex;
    align-items: center;
}

.footer-github:hover {
    color: #ffffff;
}

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

/* 滚动显示动画 */
.fade-in {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

/* 响应式设计 */
@media (max-width: 768px) {
    :root {
        --nav-height: 48px;
    }
    
    .nav {
        min-width: auto;
        width: calc(100% - 32px);
        max-width: none;
        left: 16px;
        right: 16px;
        transform: none;
    }
    
    .nav-links {
        display: none;
    }
    
    .nav-menu-toggle {
        display: flex;
    }
    
    .hero {
        padding-top: calc(var(--nav-height) + var(--spacing-xl) + 24px);
    }
    
    .hero-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .btn {
        width: 100%;
        max-width: 280px;
        justify-content: center;
    }
    
    .plugins-grid {
        grid-template-columns: 1fr;
    }
    
    .features-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--spacing-lg);
    }
    
    .footer-plugins {
        gap: 8px 16px;
    }
}

@media (max-width: 480px) {
    .features-grid {
        grid-template-columns: 1fr;
    }
    
    .footer {
        padding: 48px var(--spacing-lg) 24px;
    }
    
    .footer-content {
        gap: 24px;
    }
    
    .footer-plugins {
        gap: 6px 12px;
    }
    
    .footer-plugins a {
        font-size: 0.75rem;
    }
}

/* 浅色模式 */
@media (prefers-color-scheme: light) {
    :root {
        --color-background: #f8f9fa;
        --color-surface: rgba(255, 255, 255, 0.85);
        --color-surface-elevated: rgba(255, 255, 255, 0.95);
        --color-text-primary: #1d1d1f;
        --color-text-secondary: rgba(0, 0, 0, 0.65);
        --color-text-tertiary: rgba(0, 0, 0, 0.45);
        --color-border: rgba(0, 0, 0, 0.08);
    }
    
    body {
        background: 
            radial-gradient(ellipse 80% 60% at 50% -10%, rgba(102, 126, 234, 0.08) 0%, transparent 60%),
            radial-gradient(ellipse 60% 40% at 90% 30%, rgba(118, 75, 162, 0.05) 0%, transparent 50%),
            radial-gradient(ellipse 50% 30% at 10% 70%, rgba(79, 172, 254, 0.04) 0%, transparent 50%),
            var(--color-background);
        background-attachment: fixed;
    }
    
    .nav {
        background: rgba(255, 255, 255, 0.72);
        border-color: rgba(0, 0, 0, 0.08);
        box-shadow: 
            0 4px 30px rgba(0, 0, 0, 0.08),
            inset 0 1px 0 rgba(255, 255, 255, 0.5);
    }
    
    .nav-links a {
        color: rgba(0, 0, 0, 0.75);
    }
    
    .nav-links a:hover {
        color: #000000;
        background: rgba(0, 0, 0, 0.06);
    }
    
    .nav-icon {
        color: rgba(0, 0, 0, 0.75);
    }
    
    .nav-icon:hover {
        color: #000000;
        background: rgba(0, 0, 0, 0.06);
    }
    
    .hero::before {
        background: 
            radial-gradient(ellipse 80% 50% at 50% -20%, rgba(120, 119, 198, 0.15), transparent),
            radial-gradient(ellipse 60% 40% at 80% 60%, rgba(102, 126, 234, 0.08), transparent),
            radial-gradient(ellipse 50% 30% at 20% 80%, rgba(118, 75, 162, 0.05), transparent);
    }
    
    .btn-secondary {
        border-color: var(--color-border);
    }
    
    .btn-secondary:hover {
        background: rgba(0, 0, 0, 0.03);
    }
    
    .tag {
        background: var(--color-surface-elevated);
    }
    
    .plugin-card:hover {
        box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
    }
}

/* 减少动画 */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
    
    html {
        scroll-behavior: auto;
    }
}