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

:root {
    /* 主色调 */
    --primary-color: #e63946;
    --primary-light: #f8a5a5;
    --primary-dark: #c53030;
    
    /* 辅色调 */
    --secondary-color: #1d3557;
    --secondary-light: #457b9d;
    --secondary-dark: #0d1b2a;
    
    /* 中性色 */
    --light-color: #f1faee;
    --dark-color: #2d3748;
    --gray-color: #718096;
    --light-gray: #e2e8f0;
    
    /* 功能色 */
    --success-color: #10b981;
    --warning-color: #f59e0b;
    --info-color: #3b82f6;
    --danger-color: #ef4444;
    
    /* 字体 */
    --font-family: 'PingFang SC', 'Microsoft YaHei', 'Segoe UI', sans-serif;
    
    /* 间距 */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-xxl: 3rem;
    
    /* 圆角 */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
    
    /* 阴影 */
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.12);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.15);
    --shadow-xl: 0 20px 40px rgba(0, 0, 0, 0.2);
}

body {
    font-family: var(--font-family);
    color: var(--dark-color);
    line-height: 1.6;
    background-color: #f8fafc;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

/* 工具类 */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.text-primary { color: var(--primary-color); }
.text-secondary { color: var(--secondary-color); }
.text-success { color: var(--success-color); }
.text-warning { color: var(--warning-color); }
.text-danger { color: var(--danger-color); }
.text-info { color: var(--info-color); }
.text-muted { color: var(--gray-color); }

.bg-primary { background-color: var(--primary-color); }
.bg-secondary { background-color: var(--secondary-color); }
.bg-light { background-color: var(--light-color); }
.bg-dark { background-color: var(--dark-color); }

/* 按钮样式 */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-lg);
    border-radius: var(--radius-md);
    font-weight: 500;
    text-decoration: none;
    cursor: pointer;
    transition: all 0.3s ease;
    border: 2px solid transparent;
    font-size: 1rem;
}

.btn i {
    font-size: 1.1em;
}

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

.btn-primary:hover {
    background-color: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

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

.btn-secondary:hover {
    background-color: var(--secondary-dark);
}

.btn-accent {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-light));
    color: white;
    font-weight: 600;
}

.btn-accent:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
    background: linear-gradient(135deg, var(--primary-dark), var(--secondary-color));
}

.btn-outline {
    background-color: transparent;
    border-color: var(--primary-color);
    color: var(--primary-color);
}

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

.btn-large {
    padding: var(--spacing-md) var(--spacing-xl);
    font-size: 1.1rem;
}

/* 导航栏 */
.navbar {
    background-color: white;
    box-shadow: var(--shadow-sm);
    position: sticky;
    top: 0;
    z-index: 1000;
    padding: var(--spacing-md) 0;
}

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

.logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    text-decoration: none;
    color: var(--dark-color);
    font-weight: 700;
    font-size: 1.5rem;
}

.logo-icon {
    color: var(--primary-color);
    font-size: 1.8rem;
}

.logo-text {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.logo-sub {
    font-size: 0.9rem;
    color: var(--gray-color);
    font-weight: normal;
}

.nav-menu {
    display: flex;
    gap: var(--spacing-xl);
}

.nav-link {
    text-decoration: none;
    color: var(--dark-color);
    font-weight: 500;
    padding: var(--spacing-sm) 0;
    position: relative;
    transition: color 0.3s ease;
}

.nav-link:hover,
.nav-link.active {
    color: var(--primary-color);
}

.nav-link.active::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 2px;
    background-color: var(--primary-color);
    border-radius: 1px;
}

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

.menu-toggle {
    display: none;
    background: none;
    border: none;
    font-size: 1.5rem;
    color: var(--dark-color);
    cursor: pointer;
}

/* 英雄区域 */
.hero {
    padding: var(--spacing-xxl) 0;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    position: relative;
    overflow: hidden;
}

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

.hero-title {
    font-size: 3.5rem;
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: var(--spacing-lg);
    background: linear-gradient(to right, #fff, #f8a5a5);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 1.5rem;
    margin-bottom: var(--spacing-lg);
    opacity: 0.9;
}

.hero-description {
    font-size: 1.1rem;
    margin-bottom: var(--spacing-xl);
    opacity: 0.8;
}

.hero-stats {
    display: flex;
    gap: var(--spacing-xl);
    margin: var(--spacing-xl) 0;
}

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

.stat-number {
    font-size: 2rem;
    font-weight: 700;
    color: #f8a5a5;
}

.stat-label {
    font-size: 0.9rem;
    opacity: 0.8;
}

.hero-actions {
    display: flex;
    gap: var(--spacing-md);
    margin: var(--spacing-xl) 0;
}

.platform-badges {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
}

.badge {
    background-color: rgba(255, 255, 255, 0.1);
    padding: var(--spacing-xs) var(--spacing-md);
    border-radius: 20px;
    font-size: 0.9rem;
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
}

.hero-image {
    position: relative;
    height: 400px;
}

.floating-card {
    position: absolute;
    background-color: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    padding: var(--spacing-md);
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    box-shadow: var(--shadow-lg);
    animation: float 6s ease-in-out infinite;
}

.floating-card i {
    font-size: 2rem;
    color: white;
}

.card1 {
    top: 20%;
    left: 10%;
    animation-delay: 0s;
}

.card2 {
    top: 50%;
    right: 10%;
    animation-delay: 2s;
}

.card3 {
    bottom: 20%;
    left: 30%;
    animation-delay: 4s;
}

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

/* 核心功能 */
.core-features {
    padding: var(--spacing-xxl) 0;
    background-color: white;
}

.section-title {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: var(--spacing-sm);
    color: var(--secondary-color);
}

.section-subtitle {
    text-align: center;
    color: var(--gray-color);
    margin-bottom: var(--spacing-xxl);
    font-size: 1.1rem;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-xl);
}

.feature-card {
    background-color: var(--light-color);
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
    transition: all 0.3s ease;
    border: 1px solid transparent;
}

.feature-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-light);
}

.feature-icon {
    font-size: 3rem;
    color: var(--primary-color);
    margin-bottom: var(--spacing-lg);
}

.feature-title {
    font-size: 1.5rem;
    margin-bottom: var(--spacing-md);
    color: var(--secondary-color);
}

.feature-description {
    color: var(--gray-color);
    margin-bottom: var(--spacing-lg);
}

.feature-list {
    list-style: none;
}

.feature-list li {
    margin-bottom: var(--spacing-sm);
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-sm);
}

.feature-list i {
    color: var(--success-color);
    margin-top: 0.2rem;
}

/* 优势区域 */
.advantages {
    padding: var(--spacing-xxl) 0;
    background: linear-gradient(135deg, #f6f9fc 0%, #eef2f7 100%);
}

.advantages-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-xl);
}

.advantage-card {
    background-color: white;
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
    transition: all 0.3s ease;
    position: relative;
}

.advantage-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.advantage-number {
    font-size: 3rem;
    font-weight: 800;
    color: var(--light-gray);
    position: absolute;
    top: -20px;
    right: 20px;
    opacity: 0.3;
}

.advantage-title {
    font-size: 1.3rem;
    margin-bottom: var(--spacing-md);
    color: var(--secondary-color);
}

.advantage-description {
    color: var(--gray-color);
}

/* 下载CTA */
.download-cta {
    padding: var(--spacing-xxl) 0;
    background: linear-gradient(135deg, var(--secondary-color), var(--secondary-dark));
    color: white;
    text-align: center;
}

.cta-title {
    font-size: 2.5rem;
    margin-bottom: var(--spacing-md);
}

.cta-description {
    font-size: 1.2rem;
    margin-bottom: var(--spacing-xl);
    opacity: 0.9;
}

.cta-note {
    margin-top: var(--spacing-md);
    font-size: 0.9rem;
    opacity: 0.7;
}

/* 常见问题预览 */
.faq-preview {
    padding: var(--spacing-xxl) 0;
    background-color: white;
}

.faq-list {
    max-width: 800px;
    margin: 0 auto var(--spacing-xl);
}

.faq-item {
    margin-bottom: var(--spacing-lg);
    padding: var(--spacing-lg);
    background-color: var(--light-color);
    border-radius: var(--radius-lg);
    transition: all 0.3s ease;
}

.faq-item:hover {
    transform: translateX(10px);
    box-shadow: var(--shadow-md);
}

.faq-question {
    font-size: 1.2rem;
    color: var(--secondary-color);
    margin-bottom: var(--spacing-sm);
}

.faq-answer {
    color: var(--gray-color);
}

/* 页脚 */
.footer {
    background-color: var(--secondary-dark);
    color: white;
    padding: var(--spacing-xxl) 0 var(--spacing-xl);
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
}

.footer-title {
    font-size: 1.5rem;
    margin-bottom: var(--spacing-md);
    color: white;
}

.footer-description {
    color: rgba(255, 255, 255, 0.7);
    margin-bottom: var(--spacing-lg);
}

.footer-heading {
    font-size: 1.1rem;
    margin-bottom: var(--spacing-md);
    color: white;
}

.footer-links {
    list-style: none;
}

.footer-links li {
    margin-bottom: var(--spacing-sm);
}

.footer-links a {
    color: rgba(255, 255, 255, 0.7);
    text-decoration: none;
    transition: color 0.3s ease;
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

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

.social-links {
    display: flex;
    gap: var(--spacing-md);
}

.social-link {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background-color: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    color: white;
    text-decoration: none;
    transition: all 0.3s ease;
}

.social-link:hover {
    background-color: var(--primary-color);
    transform: translateY(-3px);
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: var(--spacing-xl);
    text-align: center;
}

.copyright {
    color: rgba(255, 255, 255, 0.5);
    margin-bottom: var(--spacing-md);
}

.footer-legal {
    display: flex;
    justify-content: center;
    gap: var(--spacing-lg);
    flex-wrap: wrap;
}

.footer-legal a {
    color: rgba(255, 255, 255, 0.7);
    text-decoration: none;
    transition: color 0.3s ease;
}

.footer-legal a:hover {
    color: white;
}

/* 功能页面特定样式 */
.page-header {
    padding: var(--spacing-xxl) 0;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-light));
    color: white;
    text-align: center;
}

.page-title {
    font-size: 3rem;
    margin-bottom: var(--spacing-sm);
}

.page-subtitle {
    font-size: 1.2rem;
    opacity: 0.9;
}

.feature-tabs {
    background-color: white;
    padding: var(--spacing-xl) 0;
    box-shadow: var(--shadow-sm);
}

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

.tab {
    padding: var(--spacing-md) var(--spacing-xl);
    background: none;
    border: 2px solid transparent;
    color: var(--gray-color);
    font-weight: 500;
    cursor: pointer;
    border-radius: var(--radius-md);
    transition: all 0.3s ease;
}

.tab:hover,
.tab.active {
    color: var(--primary-color);
    border-color: var(--primary-color);
    background-color: rgba(230, 57, 70, 0.05);
}

.feature-section {
    display: none;
    padding: var(--spacing-xxl) 0;
}

.feature-section.active {
    display: block;
    animation: fadeIn 0.5s ease;
}

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

.feature-header {
    display: flex;
    align-items: center;
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-xxl);
}

.feature-icon-large {
    font-size: 4rem;
    color: var(--primary-color);
}

.feature-info {
    flex: 1;
}

.feature-title {
    font-size: 2.5rem;
    color: var(--secondary-color);
    margin-bottom: var(--spacing-md);
}

.feature-details {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-xxl);
}

.detail-card {
    background-color: white;
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    transition: all 0.3s ease;
}

.detail-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.detail-icon {
    font-size: 2.5rem;
    color: var(--primary-color);
    margin-bottom: var(--spacing-md);
}

.detail-title {
    font-size: 1.3rem;
    margin-bottom: var(--spacing-sm);
    color: var(--secondary-color);
}

.feature-showcase {
    background-color: var(--light-color);
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
    margin-bottom: var(--spacing-xxl);
}

.showcase-title {
    text-align: center;
    font-size: 1.8rem;
    margin-bottom: var(--spacing-xl);
    color: var(--secondary-color);
}

.showcase-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-lg);
}

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

.showcase-item i {
    font-size: 2.5rem;
    color: var(--primary-color);
    margin-bottom: var(--spacing-md);
}

.showcase-item h4 {
    margin-bottom: var(--spacing-sm);
    color: var(--secondary-color);
}

.comparison-table {
    overflow-x: auto;
    margin: var(--spacing-xl) 0;
}

.comparison-table table {
    width: 100%;
    border-collapse: collapse;
    background-color: white;
    box-shadow: var(--shadow-md);
    border-radius: var(--radius-lg);
    overflow: hidden;
}

.comparison-table th,
.comparison-table td {
    padding: var(--spacing-md);
    text-align: left;
    border-bottom: 1px solid var(--light-gray);
}

.comparison-table th {
    background-color: var(--secondary-color);
    color: white;
    font-weight: 600;
}

.comparison-table tr:hover {
    background-color: var(--light-color);
}

.compat-good {
    color: var(--success-color);
    font-weight: 600;
}

.feature-highlights {
    display: grid;
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-xxl);
}

.highlight-card {
    display: grid;
    grid-template-columns: auto 1fr;
    gap: var(--spacing-xl);
    align-items: center;
    background-color: white;
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    transition: all 0.3s ease;
}

.highlight-card:hover {
    transform: translateX(10px);
    box-shadow: var(--shadow-lg);
}

.highlight-image {
    font-size: 3rem;
    color: var(--primary-color);
}

.highlight-content h3 {
    font-size: 1.5rem;
    margin-bottom: var(--spacing-md);
    color: var(--secondary-color);
}

.feature-timeline {
    margin-bottom: var(--spacing-xxl);
}

.timeline-title {
    text-align: center;
    font-size: 1.8rem;
    margin-bottom: var(--spacing-xl);
    color: var(--secondary-color);
}

.timeline {
    position: relative;
    max-width: 800px;
    margin: 0 auto;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 50%;
    top: 0;
    bottom: 0;
    width: 2px;
    background-color: var(--light-gray);
    transform: translateX(-50%);
}

.timeline-item {
    display: flex;
    align-items: center;
    margin-bottom: var(--spacing-xl);
    position: relative;
}

.timeline-number {
    width: 60px;
    height: 60px;
    background-color: var(--primary-color);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    font-weight: 700;
    z-index: 1;
    flex-shrink: 0;
}

.timeline-content {
    flex: 1;
    padding: var(--spacing-lg);
    background-color: white;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    margin-left: var(--spacing-xl);
}

.timeline-content h4 {
    color: var(--secondary-color);
    margin-bottom: var(--spacing-sm);
}

.cloud-features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-xl);
}

.cloud-card {
    text-align: center;
    padding: var(--spacing-xl);
    background-color: white;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    transition: all 0.3s ease;
}

.cloud-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.cloud-card i {
    font-size: 3rem;
    color: var(--primary-color);
    margin-bottom: var(--spacing-md);
}

.cloud-card h3 {
    margin-bottom: var(--spacing-sm);
    color: var(--secondary-color);
}

.tools-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-xl);
}

.tool-card {
    display: grid;
    grid-template-columns: auto 1fr;
    gap: var(--spacing-lg);
    align-items: start;
    background-color: white;
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
}

.tool-icon {
    font-size: 2.5rem;
    color: var(--primary-color);
}

.tool-content h3 {
    margin-bottom: var(--spacing-md);
    color: var(--secondary-color);
}

.tool-content ul {
    list-style: none;
}

.tool-content li {
    margin-bottom: var(--spacing-sm);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.tool-content li::before {
    content: '✓';
    color: var(--success-color);
    font-weight: bold;
}

.download-section {
    padding: var(--spacing-xxl) 0;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-light));
    color: white;
    text-align: center;
}

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

.download-title {
    font-size: 2.5rem;
    margin-bottom: var(--spacing-md);
}

/* 下载页面特定样式 */
.download-header {
    padding: var(--spacing-xxl) 0;
    background: linear-gradient(135deg, var(--secondary-color), var(--secondary-dark));
    color: white;
    text-align: center;
}

.download-stats {
    display: flex;
    justify-content: center;
    gap: var(--spacing-xl);
    margin-top: var(--spacing-xl);
    flex-wrap: wrap;
}

.stat {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    background-color: rgba(255, 255, 255, 0.1);
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
}

.stat i {
    color: var(--primary-light);
}

.stat strong {
    color: white;
}

.download-benefits {
    padding: var(--spacing-xl) 0;
    background-color: white;
}

.benefits-card {
    display: flex;
    align-items: center;
    gap: var(--spacing-xl);
    background: linear-gradient(135deg, #ffecd2, #fcb69f);
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
    max-width: 800px;
    margin: 0 auto;
}

.benefits-icon {
    font-size: 3rem;
    color: var(--primary-color);
}

.benefits-content h3 {
    font-size: 1.5rem;
    margin-bottom: var(--spacing-sm);
    color: var(--secondary-color);
}

.platform-section {
    padding: var(--spacing-xxl) 0;
    background-color: var(--light-color);
}

.platform-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-xl);
}

.platform-card {
    background-color: white;
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
    text-align: center;
    box-shadow: var(--shadow-md);
    transition: all 0.3s ease;
    position: relative;
}

.platform-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-lg);
}

.platform-card.featured {
    border: 2px solid var(--primary-color);
    transform: scale(1.05);
}

.platform-card.featured:hover {
    transform: scale(1.05) translateY(-10px);
}

.platform-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-lg);
}

.platform-icon {
    font-size: 3rem;
    color: var(--primary-color);
}

.platform-badge {
    background-color: var(--primary-color);
    color: white;
    padding: var(--spacing-xs) var(--spacing-md);
    border-radius: 20px;
    font-size: 0.9rem;
    font-weight: 500;
}

.platform-title {
    font-size: 1.5rem;
    margin-bottom: var(--spacing-sm);
    color: var(--secondary-color);
}

.platform-description {
    color: var(--gray-color);
    margin-bottom: var(--spacing-lg);
}

.platform-details {
    margin: var(--spacing-lg) 0;
    text-align: left;
}

.detail-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-sm);
    color: var(--gray-color);
}

.detail-item i {
    color: var(--primary-color);
    width: 20px;
}

.btn-download {
    width: 100%;
    margin-top: var(--spacing-lg);
}

.download-info {
    margin-top: var(--spacing-md);
    font-size: 0.9rem;
    color: var(--gray-color);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
}

.platform-buttons {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-lg);
}

.btn-android {
    background-color: #3ddc84;
    color: #0d652d;
}

.btn-ios {
    background-color: #007aff;
    color: white;
}

.btn-linux {
    background-color: var(--dark-color);
    color: white;
}

.linux-versions {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-lg);
}

.platform-card.enterprise {
    background: linear-gradient(135deg, #667eea, #764ba2);
    color: white;
}

.platform-card.enterprise .platform-title,
.platform-card.enterprise .platform-description {
    color: white;
}

.btn-enterprise {
    background-color: white;
    color: #764ba2;
    margin-top: var(--spacing-lg);
}

.btn-enterprise:hover {
    background-color: rgba(255, 255, 255, 0.9);
}

.enterprise-features {
    margin-top: var(--spacing-lg);
    text-align: left;
}

.enterprise-features p {
    margin-bottom: var(--spacing-sm);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.enterprise-features i {
    color: #3ddc84;
}

.version-info {
    padding: var(--spacing-xxl) 0;
    background-color: white;
}

.system-requirements,
.whats-new {
    background-color: var(--light-color);
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
    margin-bottom: var(--spacing-xl);
}

.system-requirements h3,
.whats-new h3 {
    color: var(--secondary-color);
    margin-bottom: var(--spacing-md);
}

.system-requirements ul,
.whats-new ul {
    list-style: none;
}

.system-requirements li,
.whats-new li {
    margin-bottom: var(--spacing-sm);
    padding-left: var(--spacing-md);
    position: relative;
}

.system-requirements li::before,
.whats-new li::before {
    content: '•';
    color: var(--primary-color);
    position: absolute;
    left: 0;
}

.installation-guide {
    padding: var(--spacing-xxl) 0;
    background-color: var(--light-color);
}

.guide-steps {
    max-width: 800px;
    margin: 0 auto;
}

.step {
    display: flex;
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
    align-items: flex-start;
}

.step-number {
    width: 60px;
    height: 60px;
    background-color: var(--primary-color);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    font-weight: 700;
    flex-shrink: 0;
}

.step-content h3 {
    color: var(--secondary-color);
    margin-bottom: var(--spacing-sm);
}

.download-faq {
    padding: var(--spacing-xxl) 0;
    background-color: white;
}

.faq-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-xl);
}

/* 模态框 */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(0, 0, 0, 0.5);
    z-index: 2000;
    align-items: center;
    justify-content: center;
}

.modal-content {
    background-color: white;
    border-radius: var(--radius-lg);
    width: 90%;
    max-width: 500px;
    box-shadow: var(--shadow-xl);
}

.modal-header {
    padding: var(--spacing-xl);
    border-bottom: 1px solid var(--light-gray);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.modal-header h3 {
    color: var(--secondary-color);
    margin: 0;
}

.modal-close {
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--gray-color);
}

.modal-body {
    padding: var(--spacing-xl);
}

.form-group {
    margin-bottom: var(--spacing-lg);
}

.form-group label {
    display: block;
    margin-bottom: var(--spacing-sm);
    color: var(--secondary-color);
    font-weight: 500;
}

.form-group input,
.form-group select {
    width: 100%;
    padding: var(--spacing-md);
    border: 1px solid var(--light-gray);
    border-radius: var(--radius-md);
    font-size: 1rem;
    transition: border-color 0.3s ease;
}

.form-group input:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(230, 57, 70, 0.1);
}

/* 产品详情页面特定样式 */
.product-header {
    padding: var(--spacing-xxl) 0;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-light));
    color: white;
    text-align: center;
}

.product-subtitle {
    font-size: 1.2rem;
    opacity: 0.9;
}

.product-overview {
    padding: var(--spacing-xxl) 0;
    background-color: white;
}

.overview-content {
    display: grid;
    grid-template-columns: 1fr auto;
    gap: var(--spacing-xl);
    align-items: center;
}

.product-badge {
    background: linear-gradient(135deg, #ffd700, #ff9500);
    color: white;
    padding: var(--spacing-md) var(--spacing-xl);
    border-radius: var(--radius-lg);
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-weight: 600;
    box-shadow: var(--shadow-md);
}

.architecture {
    padding: var(--spacing-xxl) 0;
    background-color: var(--light-color);
}

.architecture-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-xl);
}

.arch-card {
    text-align: center;
    padding: var(--spacing-xl);
    background-color: white;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    transition: all 0.3s ease;
}

.arch-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.arch-icon {
    font-size: 3rem;
    color: var(--primary-color);
    margin-bottom: var(--spacing-lg);
}

.version-comparison {
    padding: var(--spacing-xxl) 0;
    background-color: white;
}

.comparison-table table {
    width: 100%;
    border-collapse: collapse;
    margin: var(--spacing-xl) 0;
}

.comparison-table th,
.comparison-table td {
    padding: var(--spacing-md);
    text-align: center;
    border: 1px solid var(--light-gray);
}

.comparison-table th {
    background-color: var(--secondary-color);
    color: white;
    font-weight: 600;
}

.comparison-table tr:nth-child(even) {
    background-color: var(--light-color);
}

.technical-specs {
    padding: var(--spacing-xxl) 0;
    background-color: var(--light-color);
}

.specs-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-xl);
}

.specs-card {
    background-color: white;
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
}

.specs-card h3 {
    color: var(--secondary-color);
    margin-bottom: var(--spacing-lg);
    padding-bottom: var(--spacing-sm);
    border-bottom: 2px solid var(--primary-color);
}

.specs-list {
    list-style: none;
}

.specs-list li {
    margin-bottom: var(--spacing-md);
    padding-bottom: var(--spacing-md);
    border-bottom: 1px solid var(--light-gray);
}

.specs-list li:last-child {
    margin-bottom: 0;
    padding-bottom: 0;
    border-bottom: none;
}

.use-cases {
    padding: var(--spacing-xxl) 0;
    background-color: white;
}

.cases-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-xl);
}

.case-card {
    background-color: white;
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    border: 1px solid transparent;
    transition: all 0.3s ease;
}

.case-card:hover {
    border-color: var(--primary-color);
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.case-icon {
    font-size: 2.5rem;
    color: var(--primary-color);
    margin-bottom: var(--spacing-lg);
}

.case-card h3 {
    color: var(--secondary-color);
    margin-bottom: var(--spacing-lg);
}

.case-card ul {
    list-style: none;
}

.case-card li {
    margin-bottom: var(--spacing-sm);
    padding-left: var(--spacing-md);
    position: relative;
}

.case-card li::before {
    content: '•';
    color: var(--primary-color);
    position: absolute;
    left: 0;
}

.history-timeline {
    padding: var(--spacing-xxl) 0;
    background-color: var(--light-color);
}

.timeline-item {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
    padding: var(--spacing-lg);
    background-color: white;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    transition: all 0.3s ease;
}

.timeline-item:hover {
    transform: translateX(10px);
    box-shadow: var(--shadow-lg);
}

.timeline-date {
    background-color: var(--primary-color);
    color: white;
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-md);
    font-weight: 600;
    flex-shrink: 0;
}

.timeline-content h3 {
    color: var(--secondary-color);
    margin-bottom: var(--spacing-sm);
}

.product-faq {
    padding: var(--spacing-xxl) 0;
    background-color: white;
}

.faq-accordion {
    max-width: 800px;
    margin: 0 auto;
}

.accordion-item {
    margin-bottom: var(--spacing-md);
    border: 1px solid var(--light-gray);
    border-radius: var(--radius-md);
    overflow: hidden;
}

.accordion-header {
    width: 100%;
    padding: var(--spacing-lg);
    background-color: white;
    border: none;
    text-align: left;
    font-size: 1.1rem;
    font-weight: 500;
    color: var(--secondary-color);
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: background-color 0.3s ease;
}

.accordion-header:hover {
    background-color: var(--light-color);
}

.accordion-content {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
}

.accordion-content p {
    padding: var(--spacing-lg);
    margin: 0;
    color: var(--gray-color);
}

.product-download {
    padding: var(--spacing-xxl) 0;
    background: linear-gradient(135deg, var(--secondary-color), var(--secondary-dark));
    color: white;
    text-align: center;
}

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

.download-cta h2 {
    font-size: 2.5rem;
    margin-bottom: var(--spacing-md);
}

.download-cta p {
    font-size: 1.2rem;
    margin-bottom: var(--spacing-xl);
    opacity: 0.9;
}

/* 响应式设计 */
@media (max-width: 992px) {
    .hero .container {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .hero-stats {
        justify-content: center;
    }
    
    .hero-actions {
        justify-content: center;
    }
    
    .platform-badges {
        justify-content: center;
    }
}

@media (max-width: 768px) {
    .nav-menu {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background-color: white;
        flex-direction: column;
        padding: var(--spacing-lg);
        box-shadow: var(--shadow-lg);
        gap: var(--spacing-md);
    }
    
    .nav-menu.active {
        display: flex;
    }
    
    .menu-toggle {
        display: block;
    }
    
    .hero-title {
        font-size: 2.5rem;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .feature-header {
        flex-direction: column;
        text-align: center;
        gap: var(--spacing-lg);
    }
    
    .highlight-card {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .timeline::before {
        left: 30px;
    }
    
    .timeline-item {
        flex-direction: column;
        gap: var(--spacing-md);
    }
    
    .timeline-content {
        margin-left: 0;
    }
    
    .overview-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
}

@media (max-width: 576px) {
    .container {
        padding: 0 var(--spacing-sm);
    }
    
    .hero-title {
        font-size: 2rem;
    }
    
    .hero-subtitle {
        font-size: 1.2rem;
    }
    
    .section-title {
        font-size: 1.8rem;
    }
    
    .platform-grid {
        grid-template-columns: 1fr;
    }
    
    .platform-card.featured {
        transform: none;
    }
    
    .platform-card.featured:hover {
        transform: translateY(-10px);
    }
}