/* Windows 11 风格设计系统 */

/* 基础变量 - Win11 浅色主题 */
:root {
    /* 主色调 */
    --accent-color: #0078d4;
    --accent-hover: #006cbe;
    --accent-light: rgba(0, 120, 212, 0.1);
    
    /* 背景色 */
    --bg-primary: #f3f3f3;
    --bg-secondary: #ffffff;
    --bg-tertiary: #f9f9f9;
    --bg-card: rgba(255, 255, 255, 0.7);
    
    /* 文字颜色 */
    --text-primary: #1a1a1a;
    --text-secondary: #5f5f5f;
    --text-tertiary: #717171;
    --text-on-accent: #ffffff;
    
    /* 边框和分隔线 */
    --border-color: rgba(0, 0, 0, 0.08);
    --border-strong: rgba(0, 0, 0, 0.16);
    
    /* 阴影 - Win11 风格 */
    --shadow-flyout: 0 8px 16px rgba(0, 0, 0, 0.14);
    --shadow-card: 0 2px 8px rgba(0, 0, 0, 0.04);
    --shadow-card-hover: 0 8px 24px rgba(0, 0, 0, 0.08);
    --shadow-dialog: 0 32px 64px rgba(0, 0, 0, 0.18);
    
    /* 圆角 - Win11 风格 */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
    
    /* 过渡动画 */
    --transition-fast: 0.1s ease;
    --transition-normal: 0.2s ease;
    --transition-slow: 0.3s ease;
    
    /* 字体 */
    --font-family: 'Segoe UI Variable', 'Segoe UI', -apple-system, BlinkMacSystemFont, 'PingFang SC', 'Microsoft YaHei', sans-serif;
    
    /* 紧凑布局 */
    --section-padding: 64px;
    --container-max-width: 1200px;
    --card-padding: 24px;
    --grid-gap: 16px;
}

/* 深色模式 - 应用到 html 或 body */
.dark-theme,
.dark-theme body {
    --bg-primary: #202020;
    --bg-secondary: #2c2c2c;
    --bg-tertiary: #323232;
    --bg-card: rgba(44, 44, 44, 0.7);
    
    --text-primary: #ffffff;
    --text-secondary: #cccccc;
    --text-tertiary: #a0a0a0;
    
    --border-color: rgba(255, 255, 255, 0.08);
    --border-strong: rgba(255, 255, 255, 0.16);
}

/* 基础重置 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    font-size: 14px;
    line-height: 1.5;
    color: var(--text-primary);
    background-color: var(--bg-primary);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* 容器 */
.section-container {
    max-width: var(--container-max-width);
    margin: 0 auto;
    padding: 0 24px;
}

/* 导航栏 - Win11 亚克力效果 */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: 48px;
    background: rgba(243, 243, 243, 0.85);
    backdrop-filter: blur(20px) saturate(125%);
    -webkit-backdrop-filter: blur(20px) saturate(125%);
    border-bottom: 1px solid var(--border-color);
    z-index: 1000;
}

.dark-theme .navbar {
    background: rgba(32, 32, 32, 0.85);
}

.nav-container {
    max-width: var(--container-max-width);
    margin: 0 auto;
    padding: 0 24px;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 16px;
    font-weight: 600;
    color: var(--text-primary);
}

.nav-brand img {
    width: 24px;
    height: 24px;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 4px;
}

.nav-link {
    display: flex;
    align-items: center;
    padding: 6px 16px;
    border-radius: var(--radius-md);
    text-decoration: none;
    color: var(--text-secondary);
    font-size: 14px;
    font-weight: 400;
    transition: all var(--transition-fast);
}

.nav-link:hover {
    background: var(--accent-light);
    color: var(--accent-color);
}

.nav-link.active {
    background: var(--accent-light);
    color: var(--accent-color);
    font-weight: 500;
}

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

.theme-toggle {
    width: 36px;
    height: 36px;
    border: none;
    border-radius: var(--radius-md);
    background: transparent;
    color: var(--text-primary);
    font-size: 16px;
    cursor: pointer;
    transition: all var(--transition-fast);
    display: flex;
    align-items: center;
    justify-content: center;
}

.theme-toggle:hover {
    background: var(--accent-light);
    color: var(--accent-color);
}

.nav-toggle {
    display: none;
    width: 36px;
    height: 36px;
    border: none;
    border-radius: var(--radius-md);
    background: transparent;
    color: var(--text-primary);
    font-size: 18px;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.nav-toggle:hover {
    background: var(--accent-light);
}

/* Hero 区域 */
.hero {
    position: relative;
    display: flex;
    align-items: center;
    padding: 120px 0 64px;
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, 
        rgba(0, 120, 212, 0.08) 0%, 
        rgba(0, 108, 190, 0.05) 50%,
        rgba(0, 120, 212, 0.02) 100%);
    z-index: 0;
}

.hero-bg::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -20%;
    width: 800px;
    height: 800px;
    background: radial-gradient(circle, rgba(0, 120, 212, 0.1) 0%, transparent 70%);
    border-radius: 50%;
}

.hero-container {
    position: relative;
    z-index: 1;
    max-width: var(--container-max-width);
    margin: 0 auto;
    padding: 0 24px;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 64px;
    align-items: center;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 6px 14px;
    background: var(--accent-light);
    border-radius: 100px;
    color: var(--accent-color);
    font-size: 13px;
    font-weight: 500;
    margin-bottom: 35px;
    width: fit-content;
}

.hero-title {
    font-size: 56px;
    font-weight: 700;
    line-height: 1.1;
    letter-spacing: -0.02em;
    margin-bottom: 50px;
    color: var(--text-primary);
}

.hero-subtitle {
    font-size: 24px;
    font-weight: 400;
    color: var(--text-secondary);
    margin-bottom: 30px;
}

.hero-desc {
    font-size: 16px;
    color: var(--text-tertiary);
    max-width: 480px;
    margin-bottom: 50px;
    line-height: 1.6;
}

.hero-actions {
    display: flex;
    gap: 12px;
    margin-bottom: 40px;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 10px 20px;
    border-radius: var(--radius-md);
    font-size: 14px;
    font-weight: 500;
    text-decoration: none;
    border: none;
    cursor: pointer;
    transition: all var(--transition-fast);
}

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

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

.btn-secondary {
    background: var(--bg-secondary);
    color: var(--text-primary);
    border: 1px solid var(--border-strong);
}

.btn-secondary:hover {
    background: var(--bg-tertiary);
    border-color: var(--text-tertiary);
}

.hero-stats {
    display: flex;
    gap: 32px;
}

.stat {
    display: flex;
    flex-direction: column;
}

.stat-value {
    font-size: 28px;
    font-weight: 700;
    color: var(--text-primary);
    line-height: 1.2;
}

.stat-label {
    font-size: 13px;
    color: var(--text-tertiary);
}

.hero-visual {
    display: flex;
    justify-content: center;
    align-items: center;
}

.hero-card {
    width: 450px;
    height: 800px;
    background: var(--bg-card);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-radius: var(--radius-xl);
    border: 1px solid var(--border-color);
    /* box-shadow: var(--shadow-dialog); */
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 16px;
    overflow: hidden;
}

.demo-iframe-wrapper {
    width: 100%;
    height: 100%;
    /* border-radius: var(--radius-lg); */
    overflow: hidden;
    background: var(--bg-secondary);
    position: relative;
}

.demo-iframe-wrapper iframe {
    width: 100%;
    height: 100%;
    border: none;
    transform-origin: top left;
    position: absolute;
    top: 0;
    left: 0;
}

/* 区块标题 */
.section-header {
    text-align: center;
    margin-bottom: 48px;
}

.section-header.left {
    text-align: left;
}

.section-title {
    font-size: 32px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 8px;
    letter-spacing: -0.01em;
}

.section-desc {
    font-size: 15px;
    color: var(--text-secondary);
}

/* 功能特性 */
.features {
    padding: var(--section-padding) 0;
    background: var(--bg-secondary);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--grid-gap);
}

.feature-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: var(--card-padding);
    transition: all var(--transition-normal);
}

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

.feature-icon {
    width: 48px;
    height: 48px;
    background: var(--accent-light);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    color: var(--accent-color);
    margin-bottom: 16px;
}

.feature-card h3 {
    font-size: 16px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 8px;
}

.feature-card p {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.5;
}

/* 下载安装 */
.download {
    padding: var(--section-padding) 0;
    background: var(--bg-primary);
}

.download-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--grid-gap);
}

.download-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: var(--card-padding);
    text-align: center;
    transition: all var(--transition-normal);
}

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

.download-icon {
    width: 56px;
    height: 56px;
    background: var(--accent-light);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    color: var(--accent-color);
    margin: 0 auto 16px;
}

.download-card h3 {
    font-size: 16px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 4px;
}

.download-card > p {
    font-size: 13px;
    color: var(--text-tertiary);
    margin-bottom: 16px;
}

.qr-box {
    width: 120px;
    height: 120px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto;
    color: var(--text-tertiary);
    font-size: 48px;
}

/* 开源共建 */
.opensource {
    padding: var(--section-padding) 0;
    background: var(--bg-secondary);
}

.opensource-content {
    display: grid;
    grid-template-columns: 1.5fr 1fr;
    gap: 64px;
    align-items: center;
}

.opensource-text {
    font-size: 15px;
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: 24px;
}

.opensource-actions {
    display: flex;
    gap: 12px;
}

.opensource-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--grid-gap);
}

.stat-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 20px;
    text-align: center;
}

.stat-num {
    display: block;
    font-size: 28px;
    font-weight: 700;
    color: var(--accent-color);
    line-height: 1.2;
}

.stat-name {
    font-size: 13px;
    color: var(--text-tertiary);
}

/* 支持我们 */
.support {
    padding: var(--section-padding) 0;
    background: var(--bg-primary);
}

.support-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 48px;
    align-items: center;
}

.support-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 32px;
}

.support-icon {
    width: 56px;
    height: 56px;
    background: linear-gradient(135deg, #ec4899, #f43f5e);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    color: white;
    margin-bottom: 20px;
}

.support-card h3 {
    font-size: 20px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 12px;
}

.support-card p {
    font-size: 15px;
    color: var(--text-secondary);
    line-height: 1.6;
}

.payment-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--grid-gap);
}

.payment-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 24px;
    text-align: center;
    transition: all var(--transition-normal);
}

.payment-card:hover {
    box-shadow: var(--shadow-card-hover);
}

.payment-qr {
    width: 100%;
    aspect-ratio: 1;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 12px;
    color: var(--text-tertiary);
    font-size: 64px;
}

.payment-qr img {
    width: 200px;
}

.payment-card span {
    font-size: 14px;
    color: var(--text-secondary);
}

/* 友情链接 */
.links {
    padding: 48px 0;
    background: var(--bg-secondary);
}

.links-list {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    justify-content: center;
}

.link-tag {
    display: inline-flex;
    padding: 8px 16px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    font-size: 14px;
    color: var(--text-secondary);
    text-decoration: none;
    transition: all var(--transition-fast);
}

.link-tag:hover {
    background: var(--accent-light);
    border-color: var(--accent-color);
    color: var(--accent-color);
}

/* 页脚 */
.footer {
    padding: 48px 0 24px;
    background: var(--bg-secondary);
    border-top: 1px solid var(--border-color);
}

.footer-container {
    max-width: var(--container-max-width);
    margin: 0 auto;
    padding: 0 24px;
}

.footer-main {
    display: grid;
    grid-template-columns: 1.5fr 2fr;
    gap: 64px;
    margin-bottom: 48px;
}

.footer-brand {
    display: flex;
    align-items: center;
    gap: 16px;
}

.footer-brand img {
    width: 48px;
    height: 48px;
}

.footer-brand h4 {
    font-size: 18px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 4px;
}

.footer-brand p {
    font-size: 14px;
    color: var(--text-tertiary);
}

.footer-links {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
}

.footer-col h5 {
    font-size: 14px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 16px;
}

.footer-col a {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 6px 0;
    font-size: 14px;
    color: var(--text-secondary);
    text-decoration: none;
    transition: color var(--transition-fast);
}

.footer-col a:hover {
    color: var(--accent-color);
}

.footer-col a i {
    font-size: 14px;
    width: 16px;
}

.footer-bottom {
    padding-top: 24px;
    border-top: 1px solid var(--border-color);
    text-align: center;
}

.footer-bottom p {
    font-size: 13px;
    color: var(--text-tertiary);
}

/* 响应式设计 */
@media (max-width: 1024px) {
    .hero-container {
        grid-template-columns: 1fr;
        text-align: center;
        gap: 48px;
    }
    
    .hero-badge {
        margin: 0 auto 20px;
    }
    
    .hero-desc {
        margin-left: auto;
        margin-right: auto;
    }
    
    .hero-actions {
        justify-content: center;
    }
    
    .hero-stats {
        justify-content: center;
    }
    
    .hero-card {
        width: 280px;
        height: 560px;
        padding: 12px;
    }
    
    .features-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .opensource-content,
    .support-content {
        grid-template-columns: 1fr;
        gap: 48px;
    }
    
    .opensource-stats {
        order: -1;
    }
    
    .download-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    :root {
        --section-padding: 48px;
    }
    
    .nav-menu {
        position: fixed;
        top: 48px;
        left: 0;
        right: 0;
        background: var(--bg-card);
        backdrop-filter: blur(20px);
        flex-direction: column;
        padding: 16px;
        gap: 4px;
        transform: translateY(-100%);
        opacity: 0;
        visibility: hidden;
        transition: all var(--transition-normal);
    }
    
    .nav-menu.active {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }
    
    .nav-link {
        padding: 12px 16px;
        width: 100%;
    }
    
    .nav-toggle {
        display: flex;
        align-items: center;
        justify-content: center;
    }
    
    .theme-toggle {
        width: 40px;
        height: 40px;
        font-size: 18px;
    }
    
    .hero {
        padding: 100px 0 48px;
    }
    
    .hero-title {
        font-size: 36px;
    }
    
    .hero-subtitle {
        font-size: 18px;
    }
    
    .hero-card {
        width: 260px;
        height: 520px;
        padding: 10px;
    }
    
    .section-title {
        font-size: 28px;
    }
    
    .features-grid,
    .download-grid {
        grid-template-columns: 1fr;
    }
    
    .opensource-stats {
        grid-template-columns: 1fr;
    }
    
    .payment-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-main {
        grid-template-columns: 1fr;
        gap: 32px;
    }
    
    .footer-links {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 480px) {
    .section-container,
    .nav-container,
    .footer-container {
        padding: 0 16px;
    }
    
    .hero-title {
        font-size: 32px;
    }
    
    .hero-actions {
        flex-direction: column;
    }
    
    .btn {
        width: 100%;
    }
    
    .hero-stats {
        gap: 24px;
    }
    
    .feature-card,
    .download-card,
    .support-card,
    .payment-card {
        padding: 20px;
    }
    
    .hero-card {
        width: 220px;
        height: 440px;
        padding: 8px;
    }    
    
    .footer-links {
        grid-template-columns: 1fr;
        gap: 24px;
    }
}