/* CSS 变量定义 */
:root {
    --color-primary: #f2e2e1;
    --color-secondary: #575461;
    --color-dark: #303746;
    --color-accent: #b6a099;
    
    /* 扩展颜色调色板 */
    --color-white: #ffffff;
    --color-light: #faf9f8;
    --color-text: #2c2c2c;
    --color-text-light: #6b6b6b;
    --color-border: rgba(183, 160, 153, 0.2);
    --color-shadow: rgba(48, 55, 70, 0.1);
    --color-overlay: rgba(48, 55, 70, 0.8);
    
    /* 渐变色 */
    --gradient-primary: linear-gradient(135deg, var(--color-primary) 0%, var(--color-accent) 100%);
    --gradient-secondary: linear-gradient(135deg, var(--color-secondary) 0%, var(--color-dark) 100%);
    --gradient-overlay: linear-gradient(to bottom, rgba(48, 55, 70, 0.4), rgba(48, 55, 70, 0.8));
    
    /* 字体 */
    --font-primary: 'Noto Sans SC', sans-serif;
    --font-secondary: 'Noto Serif SC', serif;
    
    /* 间距 */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-2xl: 4rem;
    --spacing-3xl: 6rem;
    
    /* 阴影 */
    --shadow-sm: 0 2px 4px var(--color-shadow);
    --shadow-md: 0 4px 6px var(--color-shadow);
    --shadow-lg: 0 10px 15px var(--color-shadow);
    --shadow-xl: 0 20px 25px var(--color-shadow);
    
    /* 边框圆角 */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    
    /* 过渡动画 */
    --transition-fast: 0.15s ease-out;
    --transition-normal: 0.3s ease-out;
    --transition-slow: 0.5s ease-out;
    
    /* 容器宽度 */
    --container-max-width: 1200px;
    --container-padding: var(--spacing-md);
}

/* 重置样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

/* 基础样式 */
html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: var(--font-primary);
    font-weight: 400;
    line-height: 1.6;
    color: var(--color-text);
    background-color: var(--color-light);
    overflow-x: hidden;
}

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

/* 按钮样式 */
.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-sm) var(--spacing-lg);
    border: none;
    border-radius: var(--radius-md);
    font-family: var(--font-primary);
    font-weight: 500;
    text-decoration: none;
    cursor: pointer;
    transition: all var(--transition-normal);
    position: relative;
    overflow: hidden;
}

.btn-primary {
    background: var(--gradient-secondary);
    color: var(--color-white);
    box-shadow: var(--shadow-md);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn-secondary {
    background: transparent;
    color: var(--color-secondary);
    border: 2px solid var(--color-secondary);
}

.btn-secondary:hover {
    background: var(--color-secondary);
    color: var(--color-white);
    transform: translateY(-2px);
}

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

.section-title {
    font-family: var(--font-secondary);
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--color-dark);
    margin-bottom: var(--spacing-sm);
    position: relative;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -var(--spacing-xs);
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 4px;
    background: var(--gradient-primary);
    border-radius: var(--radius-sm);
}

.section-subtitle {
    font-size: 1.1rem;
    color: var(--color-text-light);
    max-width: 600px;
    margin: 0 auto;
}

/* 头部导航 */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--color-border);
    z-index: 1000;
    transition: all var(--transition-normal);
}

.navbar {
    padding: var(--spacing-sm) 0;
}

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

.nav-logo a {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    text-decoration: none;
    color: var(--color-dark);
    font-weight: 700;
    font-size: 1.25rem;
}

.logo-icon {
    width: 32px;
    height: 32px;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: var(--spacing-lg);
}

.nav-link {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    text-decoration: none;
    color: var(--color-text);
    font-weight: 500;
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-md);
    transition: all var(--transition-normal);
}

.nav-link:hover {
    color: var(--color-secondary);
    background: var(--color-primary);
}

.nav-link i {
    font-size: 0.9rem;
}

/* 汉堡菜单 */
.hamburger {
    display: none;
    flex-direction: column;
    cursor: pointer;
    gap: 4px;
}

.bar {
    width: 25px;
    height: 3px;
    background: var(--color-dark);
    transition: var(--transition-normal);
    border-radius: var(--radius-sm);
}

/* Hero 区域 */
.hero {
    background: var(--gradient-primary);
    padding: calc(80px + var(--spacing-3xl)) 0 var(--spacing-3xl);
    min-height: 70vh;
    display: flex;
    align-items: center;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    bottom: 0;
    left: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 20"><defs><pattern id="dots" x="0" y="0" width="20" height="20" patternUnits="userSpaceOnUse"><circle fill="%23ffffff" fill-opacity="0.1" cx="10" cy="10" r="1"/></pattern></defs><rect width="100" height="20" fill="url(%23dots)"/></svg>');
}

.hero-container {
    max-width: var(--container-max-width);
    margin: 0 auto;
    padding: 0 var(--container-padding);
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-3xl);
    align-items: center;
    position: relative;
    z-index: 1;
}

.hero-title {
    margin-bottom: var(--spacing-lg);
}

.title-main {
    display: block;
    font-family: var(--font-secondary);
    font-size: 3.5rem;
    font-weight: 700;
    color: var(--color-dark);
    line-height: 1.1;
}

.title-sub {
    display: block;
    font-size: 1.5rem;
    font-weight: 300;
    color: var(--color-secondary);
    margin-top: var(--spacing-xs);
}

.hero-description {
    font-size: 1.1rem;
    color: var(--color-text);
    margin-bottom: var(--spacing-xl);
    line-height: 1.7;
}

.hero-info {
    margin-bottom: var(--spacing-xl);
}

.version-info {
    display: flex;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-md);
    flex-wrap: wrap;
}

.version-badge,
.release-date {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-xs) var(--spacing-sm);
    background: var(--color-white);
    border-radius: var(--radius-md);
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--color-secondary);
    box-shadow: var(--shadow-sm);
}

.game-features {
    display: flex;
    gap: var(--spacing-sm);
    flex-wrap: wrap;
}

.feature-tag {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-xs) var(--spacing-sm);
    background: rgba(255, 255, 255, 0.8);
    border-radius: var(--radius-lg);
    font-size: 0.85rem;
    color: var(--color-text);
    border: 1px solid var(--color-border);
}

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

.hero-visual {
    position: relative;
}

.hero-image {
    position: relative;
    border-radius: var(--radius-xl);
    overflow: hidden;
    box-shadow: var(--shadow-xl);
}

.hero-image img {
    width: 100%;
    height: auto;
    display: block;
    transition: transform var(--transition-slow);
}

.hero-image:hover img {
    transform: scale(1.05);
}

/* 特色功能区域 */
.features {
    padding: var(--spacing-3xl) 0;
    background: var(--color-white);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-3xl);
}

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

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
    background: var(--color-white);
}

.feature-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto var(--spacing-md);
    background: var(--gradient-secondary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-white);
    font-size: 2rem;
}

.feature-title {
    font-family: var(--font-secondary);
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--color-dark);
    margin-bottom: var(--spacing-sm);
}

.feature-description {
    color: var(--color-text-light);
    line-height: 1.7;
}

/* 操作说明 */
.controls-info {
    background: var(--gradient-primary);
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
    text-align: center;
}

.controls-title {
    font-family: var(--font-secondary);
    font-size: 1.5rem;
    color: var(--color-dark);
    margin-bottom: var(--spacing-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
}

.controls-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
    gap: var(--spacing-md);
}

.control-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-xs);
}

kbd {
    padding: var(--spacing-xs) var(--spacing-sm);
    background: var(--color-white);
    border: 2px solid var(--color-secondary);
    border-radius: var(--radius-md);
    font-family: var(--font-primary);
    font-weight: 600;
    color: var(--color-secondary);
    box-shadow: var(--shadow-sm);
    min-width: 40px;
    text-align: center;
}

/* 画廊区域 */
.gallery {
    padding: var(--spacing-3xl) 0;
    background: var(--color-light);
}

.gallery-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: var(--spacing-lg);
}

.gallery-item {
    position: relative;
    border-radius: var(--radius-lg);
    overflow: hidden;
    cursor: pointer;
    box-shadow: var(--shadow-md);
    transition: all var(--transition-normal);
}

.gallery-item:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-xl);
}

.gallery-item img {
    width: 100%;
    height: 250px;
    object-fit: cover;
    transition: transform var(--transition-slow);
}

.gallery-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--color-overlay);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity var(--transition-normal);
}

.gallery-item:hover .gallery-overlay {
    opacity: 1;
}

.gallery-item:hover img {
    transform: scale(1.1);
}

.gallery-overlay i {
    color: var(--color-white);
    font-size: 2rem;
}

/* 新闻动态区域 */
.news {
    padding: var(--spacing-3xl) 0;
    background: var(--color-white);
}

.news-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: var(--spacing-xl);
}

.news-card {
    background: var(--color-light);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    border: 1px solid var(--color-border);
    transition: all var(--transition-normal);
}

.news-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
    background: var(--color-white);
}

.news-date {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    color: var(--color-text-light);
    font-size: 0.9rem;
    margin-bottom: var(--spacing-sm);
}

.news-title {
    font-family: var(--font-secondary);
    font-size: 1.3rem;
    font-weight: 600;
    color: var(--color-dark);
    margin-bottom: var(--spacing-sm);
}

.news-excerpt {
    color: var(--color-text);
    line-height: 1.7;
    margin-bottom: var(--spacing-md);
}

.news-tags {
    display: flex;
    gap: var(--spacing-xs);
    flex-wrap: wrap;
}

.tag {
    padding: var(--spacing-xs) var(--spacing-sm);
    background: var(--color-accent);
    color: var(--color-white);
    border-radius: var(--radius-lg);
    font-size: 0.8rem;
    font-weight: 500;
}

/* 用户评价区域 */
.reviews {
    padding: var(--spacing-3xl) 0;
    background: var(--color-light);
}

.review-stats {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-3xl);
    margin-bottom: var(--spacing-3xl);
    background: var(--color-white);
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
}

.rating-overview {
    text-align: center;
}

.rating-score {
    margin-bottom: var(--spacing-lg);
}

.score {
    font-size: 3rem;
    font-weight: 700;
    color: var(--color-dark);
    display: block;
}

.stars {
    color: #fbbf24;
    font-size: 1.5rem;
    margin: var(--spacing-sm) 0;
}

.review-count {
    color: var(--color-text-light);
    font-size: 0.9rem;
}

.rating-breakdown {
    max-width: 300px;
    margin: 0 auto;
}

.rating-bar {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-xs);
}

.star-count {
    min-width: 30px;
    font-size: 0.9rem;
    color: var(--color-text);
}

.bar {
    flex: 1;
    height: 8px;
    background: var(--color-border);
    border-radius: var(--radius-sm);
    overflow: hidden;
}

.fill {
    height: 100%;
    background: #fbbf24;
    border-radius: var(--radius-sm);
    transition: width var(--transition-slow);
}

.percentage {
    min-width: 40px;
    text-align: right;
    font-size: 0.9rem;
    color: var(--color-text-light);
}

.review-tags h4 {
    color: var(--color-dark);
    margin-bottom: var(--spacing-md);
    font-family: var(--font-secondary);
}

.tags-list {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
}

.review-tag {
    padding: var(--spacing-xs) var(--spacing-sm);
    background: var(--gradient-primary);
    color: var(--color-dark);
    border-radius: var(--radius-lg);
    font-size: 0.9rem;
    font-weight: 500;
}

/* 评价轮播 */
.reviews-carousel {
    position: relative;
    max-width: 800px;
    margin: 0 auto var(--spacing-xl);
}

.review-card {
    background: var(--color-white);
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    display: none;
}

.review-card.active {
    display: block;
}

.review-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: var(--spacing-md);
}

.reviewer-info {
    display: flex;
    gap: var(--spacing-sm);
}

.reviewer-avatar {
    width: 50px;
    height: 50px;
    background: var(--gradient-secondary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-white);
    font-size: 1.2rem;
}

.reviewer-name {
    font-family: var(--font-secondary);
    font-weight: 600;
    color: var(--color-dark);
    margin-bottom: var(--spacing-xs);
}

.review-rating {
    color: #fbbf24;
}

.review-date {
    color: var(--color-text-light);
    font-size: 0.9rem;
}

.review-content {
    color: var(--color-text);
    line-height: 1.7;
    font-style: italic;
}

.carousel-controls {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-lg);
}

.carousel-btn {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    border: none;
    background: var(--color-secondary);
    color: var(--color-white);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-normal);
}

.carousel-btn:hover {
    background: var(--color-dark);
    transform: scale(1.1);
}

.carousel-dots {
    display: flex;
    gap: var(--spacing-xs);
}

.dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    border: none;
    background: var(--color-border);
    cursor: pointer;
    transition: all var(--transition-normal);
}

.dot.active {
    background: var(--color-secondary);
}

/* 版本历史区域 */
.versions {
    padding: var(--spacing-3xl) 0;
    background: var(--color-white);
}

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

.versions-timeline::before {
    content: '';
    position: absolute;
    left: 50px;
    top: 0;
    bottom: 0;
    width: 2px;
    background: var(--color-border);
}

.version-item {
    position: relative;
    margin-bottom: var(--spacing-3xl);
    padding-left: 120px;
}

.version-marker {
    position: absolute;
    left: 0;
    top: 0;
    width: 100px;
    text-align: center;
}

.version-number {
    display: inline-block;
    width: 60px;
    height: 60px;
    background: var(--gradient-secondary);
    color: var(--color-white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 1.1rem;
    box-shadow: var(--shadow-md);
    position: relative;
    z-index: 1;
}

.version-content {
    background: var(--color-light);
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-border);
}

.version-header {
    margin-bottom: var(--spacing-md);
}

.version-title {
    font-family: var(--font-secondary);
    font-size: 1.4rem;
    font-weight: 600;
    color: var(--color-dark);
    margin-bottom: var(--spacing-sm);
}

.version-meta {
    display: flex;
    gap: var(--spacing-md);
    flex-wrap: wrap;
}

.version-date,
.version-size,
.version-platform {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    color: var(--color-text-light);
    font-size: 0.9rem;
}

.version-description p {
    color: var(--color-text);
    margin-bottom: var(--spacing-md);
    line-height: 1.7;
}

.version-features {
    list-style: none;
    margin-bottom: var(--spacing-md);
}

.version-features li {
    color: var(--color-text);
    padding: var(--spacing-xs) 0;
    position: relative;
    padding-left: var(--spacing-md);
}

.version-features li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--color-accent);
    font-weight: bold;
}

.version-actions {
    margin-top: var(--spacing-md);
}

/* 常见问题区域 */
.faq {
    padding: var(--spacing-3xl) 0;
    background: var(--color-light);
}

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

.faq-item {
    background: var(--color-white);
    border-radius: var(--radius-lg);
    margin-bottom: var(--spacing-md);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--color-border);
}

.faq-question {
    width: 100%;
    padding: var(--spacing-lg);
    background: none;
    border: none;
    text-align: left;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-family: var(--font-primary);
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--color-dark);
    transition: all var(--transition-normal);
}

.faq-question:hover {
    background: var(--color-primary);
}

.faq-question i {
    transition: transform var(--transition-normal);
    color: var(--color-secondary);
}

.faq-item.active .faq-question i {
    transform: rotate(180deg);
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height var(--transition-normal);
}

.faq-item.active .faq-answer {
    max-height: 300px;
}

.faq-answer p {
    padding: 0 var(--spacing-lg) var(--spacing-lg);
    color: var(--color-text);
    line-height: 1.7;
}

/* 页脚 */
.footer {
    background: var(--gradient-secondary);
    color: var(--color-white);
    padding: var(--spacing-3xl) 0 var(--spacing-lg);
}

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

.footer-logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    margin-bottom: var(--spacing-md);
}

.footer-logo-icon {
    width: 32px;
    height: 32px;
}

.footer-logo-text {
    font-weight: 700;
    font-size: 1.25rem;
}

.footer-description {
    color: rgba(255, 255, 255, 0.8);
    line-height: 1.7;
    margin-bottom: var(--spacing-md);
}

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

.footer-links a {
    color: var(--color-white);
    text-decoration: none;
    padding: var(--spacing-xs) var(--spacing-sm);
    border: 1px solid rgba(255, 255, 255, 0.3);
    border-radius: var(--radius-md);
    transition: all var(--transition-normal);
}

.footer-links a:hover {
    background: rgba(255, 255, 255, 0.1);
}

.footer-title {
    font-family: var(--font-secondary);
    font-size: 1.2rem;
    font-weight: 600;
    margin-bottom: var(--spacing-md);
}

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

.footer-nav li {
    margin-bottom: var(--spacing-xs);
}

.footer-nav a {
    color: rgba(255, 255, 255, 0.8);
    text-decoration: none;
    transition: color var(--transition-normal);
}

.footer-nav a:hover {
    color: var(--color-white);
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.2);
    padding-top: var(--spacing-lg);
    text-align: center;
    color: rgba(255, 255, 255, 0.7);
}

.footer-bottom p {
    margin-bottom: var(--spacing-xs);
}

/* 返回顶部按钮 */
.back-to-top {
    position: fixed;
    bottom: var(--spacing-lg);
    right: var(--spacing-lg);
    width: 50px;
    height: 50px;
    background: var(--gradient-secondary);
    color: var(--color-white);
    border: none;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-normal);
    z-index: 1000;
    box-shadow: var(--shadow-lg);
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
}

.back-to-top:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-xl);
}

/* 模态框 */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.9);
    z-index: 2000;
    justify-content: center;
    align-items: center;
}

.modal.active {
    display: flex;
}

.modal-content {
    position: relative;
    max-width: 90vw;
    max-height: 90vh;
    background: var(--color-white);
    border-radius: var(--radius-lg);
    overflow: hidden;
}

.modal-close {
    position: absolute;
    top: var(--spacing-sm);
    right: var(--spacing-md);
    font-size: 2rem;
    color: var(--color-white);
    cursor: pointer;
    z-index: 1;
    background: rgba(0, 0, 0, 0.5);
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-normal);
}

.modal-close:hover {
    background: rgba(0, 0, 0, 0.8);
}

#modalImage {
    width: 100%;
    height: auto;
    display: block;
}

.modal-nav {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    width: 100%;
    display: flex;
    justify-content: space-between;
    padding: 0 var(--spacing-md);
    pointer-events: none;
}

.modal-nav-btn {
    width: 50px;
    height: 50px;
    background: rgba(0, 0, 0, 0.5);
    color: var(--color-white);
    border: none;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    transition: all var(--transition-normal);
    pointer-events: auto;
}

.modal-nav-btn:hover {
    background: rgba(0, 0, 0, 0.8);
    transform: scale(1.1);
}

/* 响应式设计 */
@media (max-width: 1024px) {
    .hero-container {
        grid-template-columns: 1fr;
        gap: var(--spacing-xl);
        text-align: center;
    }
    
    .hero-visual {
        order: -1;
    }
    
    .title-main {
        font-size: 3rem;
    }
    
    .review-stats {
        grid-template-columns: 1fr;
        gap: var(--spacing-xl);
    }
    
    .version-item {
        padding-left: 100px;
    }
}

@media (max-width: 768px) {
    :root {
        --container-padding: var(--spacing-sm);
    }
    
    .nav-menu {
        position: fixed;
        top: 70px;
        left: -100%;
        width: 100%;
        height: calc(100vh - 70px);
        background: var(--color-white);
        flex-direction: column;
        align-items: center;
        justify-content: flex-start;
        padding-top: var(--spacing-xl);
        transition: left var(--transition-normal);
        box-shadow: var(--shadow-lg);
    }
    
    .nav-menu.active {
        left: 0;
    }
    
    .nav-item {
        margin-bottom: var(--spacing-md);
    }
    
    .nav-link {
        font-size: 1.1rem;
        padding: var(--spacing-md);
    }
    
    .hamburger {
        display: flex;
    }
    
    .hamburger.active .bar:nth-child(1) {
        transform: rotate(45deg) translate(5px, 5px);
    }
    
    .hamburger.active .bar:nth-child(2) {
        opacity: 0;
    }
    
    .hamburger.active .bar:nth-child(3) {
        transform: rotate(-45deg) translate(7px, -6px);
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .title-main {
        font-size: 2.5rem;
    }
    
    .title-sub {
        font-size: 1.2rem;
    }
    
    .hero {
        padding: calc(70px + var(--spacing-xl)) 0 var(--spacing-xl);
        min-height: auto;
    }
    
    .hero-actions {
        justify-content: center;
    }
    
    .features-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--spacing-md);
    }
    
    .feature-card {
        padding: var(--spacing-lg);
    }
    
    .controls-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .gallery-grid {
        grid-template-columns: 1fr;
    }
    
    .news-grid {
        grid-template-columns: 1fr;
    }
    
    .version-item {
        padding-left: 80px;
    }
    
    .version-marker {
        width: 70px;
    }
    
    .version-number {
        width: 50px;
        height: 50px;
        font-size: 0.9rem;
    }
    
    .version-meta {
        flex-direction: column;
        gap: var(--spacing-xs);
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
        text-align: center;
    }
    
    .footer-links {
        justify-content: center;
    }
    
    .back-to-top {
        bottom: var(--spacing-md);
        right: var(--spacing-md);
        width: 45px;
        height: 45px;
    }
}

@media (max-width: 480px) {
    .version-item {
        padding-left: 0;
        padding-top: var(--spacing-xl);
    }
    
    .versions-timeline::before {
        display: none;
    }
    
    .version-marker {
        position: static;
        width: auto;
        margin-bottom: var(--spacing-md);
    }
    
    .hero-actions {
        flex-direction: column;
        align-items: center;
    }
    
    .btn {
        width: 100%;
        max-width: 250px;
        justify-content: center;
    }
    
    .controls-grid {
        grid-template-columns: repeat(3, 1fr);
        gap: var(--spacing-sm);
    }
    
    .control-item {
        font-size: 0.9rem;
    }
    
    kbd {
        min-width: 35px;
        padding: 6px 8px;
    }
}

/* 懒加载图片 */
img[loading="lazy"] {
    opacity: 0;
    transition: opacity var(--transition-slow);
}

img[loading="lazy"].loaded {
    opacity: 1;
}

/* 滚动条样式 */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: var(--color-light);
}

::-webkit-scrollbar-thumb {
    background: var(--color-accent);
    border-radius: var(--radius-sm);
}

::-webkit-scrollbar-thumb:hover {
    background: var(--color-secondary);
}

/* 选择文本样式 */
::selection {
    background: var(--color-primary);
    color: var(--color-dark);
}

/* 打印样式 */
@media print {
    .header,
    .back-to-top,
    .hamburger,
    .carousel-controls,
    .modal {
        display: none !important;
    }
    
    .hero {
        padding-top: 0;
    }
    
    body {
        font-size: 12pt;
        line-height: 1.4;
    }
    
    .section-title {
        font-size: 18pt;
    }
    
    .feature-card,
    .news-card,
    .version-content {
        break-inside: avoid;
    }
}

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

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

/* 视差滚动效果 */
.parallax {
    background-attachment: fixed;
    background-position: center;
    background-repeat: no-repeat;
    background-size: cover;
}

/* 焦点管理 */
*:focus {
    outline: 2px solid var(--color-secondary);
    outline-offset: 2px;
}

button:focus,
a:focus {
    outline-color: var(--color-accent);
}

/* 减少动画（用户偏好） */
@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;
    }
}