/* ===== CSS变量定义 ===== */
:root {
    /* 主题色彩 */
    --color-primary: #7d6b6c;
    --color-dark: #060506;
    --color-accent: #4c637d;
    --color-muted: #877f85;
    
    /* 渐变色 */
    --gradient-primary: linear-gradient(135deg, var(--color-primary), var(--color-accent));
    --gradient-dark: linear-gradient(135deg, var(--color-dark), var(--color-muted));
    --gradient-hero: linear-gradient(135deg, rgba(7, 5, 6, 0.9), rgba(76, 99, 125, 0.8));
    
    /* 背景色 */
    --bg-primary: var(--color-dark);
    --bg-secondary: #1a1a1a;
    --bg-card: #2a2a2a;
    --bg-overlay: rgba(0, 0, 0, 0.8);
    
    /* 文字色 */
    --text-primary: #ffffff;
    --text-secondary: #cccccc;
    --text-muted: #888888;
    
    /* 边框和阴影 */
    --border-radius: 12px;
    --border-radius-small: 8px;
    --shadow-small: 0 2px 8px rgba(0, 0, 0, 0.3);
    --shadow-medium: 0 4px 16px rgba(0, 0, 0, 0.4);
    --shadow-large: 0 8px 32px rgba(0, 0, 0, 0.5);
    
    /* 间距 */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 1.5rem;
    --spacing-xxl: 4rem;
    
    /* 字体 */
    --font-primary: 'Noto Sans SC', sans-serif;
    --font-heading: 'Orbitron', monospace;
    
    /* 过渡动画 */
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
}

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

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

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

/* ===== 通用样式 ===== */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-sm);
}

.section-title {
    font-family: var(--font-heading);
    font-size: 2.5rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: var(--spacing-xl);
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    position: relative;
}

.section-title i {
    margin-right: var(--spacing-xs);
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* ===== 按钮样式 ===== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-sm) var(--spacing-lg);
    border: none;
    border-radius: var(--border-radius);
    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-primary);
    color: var(--text-primary);
    box-shadow: var(--shadow-medium);
}

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

.btn-primary:active {
    transform: translateY(0);
}

.btn i {
    margin-right: 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-primary);
    border: none;
    border-radius: 50%;
    color: var(--text-primary);
    font-size: 1.2rem;
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-normal);
    z-index: 1000;
    box-shadow: var(--shadow-medium);
}

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

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

/* ===== 头部导航 ===== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(6, 5, 6, 0.95);
    backdrop-filter: blur(10px);
    z-index: 1000;
    box-shadow: var(--shadow-small);
}

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

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-sm);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-logo {
    display: flex;
    align-items: center;
    text-decoration: none;
    color: var(--text-primary);
    font-family: var(--font-heading);
    font-size: 1.5rem;
    font-weight: 700;
}

.logo-icon {
    width: 32px;
    height: 32px;
    margin-right: var(--spacing-xs);
}

.logo-text {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

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

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

.nav-link:hover {
    color: var(--color-primary);
    background: rgba(125, 107, 108, 0.1);
}

.nav-link i {
    margin-right: var(--spacing-xs);
    font-size: 0.9rem;
}

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

.bar {
    width: 25px;
    height: 3px;
    background: var(--text-primary);
    transition: var(--transition-fast);
}

/* ===== 主要内容 ===== */
.main-content {
    padding-top: 80px;
}

/* ===== 英雄区域简化样式 ===== */
.hero {
    min-height: 75vh;
    background: var(--gradient-hero);
    display: flex;
    align-items: center;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><pattern id="grid" width="10" height="10" patternUnits="userSpaceOnUse"><path d="M 10 0 L 0 0 0 10" fill="none" stroke="rgba(125,107,108,0.1)" stroke-width="0.5"/></pattern></defs><rect width="100" height="100" fill="url(%23grid)"/></svg>');
    animation: gridMove 20s linear infinite;
}

@keyframes gridMove {
    0% { transform: translateX(0) translateY(0); }
    100% { transform: translateX(10px) translateY(10px); }
}

.hero-container {
    max-width: 1000px;
    margin: 0 auto;
    padding: 0 var(--spacing-sm);
    position: relative;
    z-index: 1;
}

.hero-content {
    max-width: 700px;
    text-align: center;
    margin: 0 auto;
}

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

.title-main {
    display: block;
    font-family: var(--font-heading);
    font-size: clamp(2.5rem, 6vw, 4rem);
    font-weight: 900;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.5);
}

.title-sub {
    display: block;
    font-family: var(--font-heading);
    font-size: clamp(1rem, 2.5vw, 1.5rem);
    font-weight: 500;
    color: var(--text-secondary);
    margin-top: var(--spacing-xs);
    letter-spacing: 2px;
}

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

.hero-features {
    display: flex;
    justify-content: center;
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
    flex-wrap: wrap;
}

.feature-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-xs) var(--spacing-md);
    background: rgba(125, 107, 108, 0.2);
    border-radius: var(--border-radius-small);
    backdrop-filter: blur(10px);
    transition: all var(--transition-normal);
}

.feature-item:hover {
    background: rgba(125, 107, 108, 0.3);
    transform: translateY(-2px);
}

.feature-item i {
    color: var(--color-primary);
    font-size: 1.1rem;
}

.hero-version {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
    flex-wrap: wrap;
}

.version-badge {
    background: var(--gradient-primary);
    color: var(--text-primary);
    padding: var(--spacing-xs) var(--spacing-md);
    border-radius: var(--border-radius-small);
    font-weight: 600;
    font-size: 0.9rem;
}

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

.version-rating {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.version-rating::before {
    content: '⭐';
    margin-right: 4px;
}

.hero-actions {
    text-align: center;
    margin-bottom: var(--spacing-xl);
}

.download-btn {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: 1.1rem;
    padding: var(--spacing-md) var(--spacing-xl);
    transition: all var(--transition-normal);
}

.download-btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(125, 107, 108, 0.4);
}

.btn-content {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
}

.btn-text {
    font-size: 1.1rem;
    font-weight: 600;
}

.btn-info {
    font-size: 0.8rem;
    opacity: 0.9;
}

/* ===== 新闻动态区 ===== */
.news {
    padding: var(--spacing-xxl) 0;
    background: var(--bg-secondary);
}

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

.news-item {
    background: var(--bg-card);
    padding: var(--spacing-lg);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-small);
    transition: all var(--transition-normal);
    position: relative;
    overflow: hidden;
}

.news-item::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 100%;
    background: var(--gradient-primary);
}

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

.news-item.featured {
    border: 2px solid var(--color-primary);
}

.news-date {
    color: var(--text-muted);
    font-size: 0.9rem;
    margin-bottom: var(--spacing-xs);
}

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

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

.news-link {
    display: inline-flex;
    align-items: center;
    color: var(--color-primary);
    text-decoration: none;
    font-weight: 500;
    transition: color var(--transition-fast);
}

.news-link:hover {
    color: var(--color-accent);
}

.news-link i {
    margin-right: var(--spacing-xs);
}

/* ===== 媒体画廊 ===== */
.gallery {
    padding: var(--spacing-xxl) 0;
    background: var(--bg-primary);
}

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

.gallery-item {
    position: relative;
    aspect-ratio: 16/9;
    border-radius: var(--border-radius);
    overflow: hidden;
    cursor: pointer;
    transition: transform var(--transition-normal);
    box-shadow: var(--shadow-small);
}

.gallery-item:hover {
    transform: scale(1.05);
    box-shadow: var(--shadow-large);
}

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

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

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

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

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

/* 图片预览模态框 */
.modal {
    display: none;
    position: fixed;
    z-index: 2000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.9);
    backdrop-filter: blur(5px);
}

.modal-content {
    margin: auto;
    display: block;
    width: 90%;
    max-width: 900px;
    max-height: 80vh;
    object-fit: contain;
    border-radius: var(--border-radius);
}

.modal-close {
    position: absolute;
    top: 20px;
    right: 35px;
    color: var(--text-primary);
    font-size: 40px;
    font-weight: bold;
    cursor: pointer;
    transition: color var(--transition-fast);
}

.modal-close:hover {
    color: var(--color-primary);
}

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

.modal-nav-btn {
    background: rgba(125, 107, 108, 0.8);
    border: none;
    color: var(--text-primary);
    padding: var(--spacing-sm);
    border-radius: 50%;
    cursor: pointer;
    transition: all var(--transition-fast);
    pointer-events: auto;
    width: 50px;
    height: 50px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.modal-nav-btn:hover {
    background: var(--color-primary);
    transform: scale(1.1);
}

/* ===== 用户评价区 ===== */
.reviews {
    padding: var(--spacing-xxl) 0;
    background: var(--bg-secondary);
}

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

.stats-item {
    text-align: center;
    padding: var(--spacing-lg);
    background: var(--bg-card);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-small);
    min-width: 150px;
}

.stats-number {
    font-family: var(--font-heading);
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--color-primary);
    margin-bottom: var(--spacing-xs);
}

.stats-label {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-bottom: var(--spacing-xs);
}

.stats-stars {
    color: #ffc107;
}

.reviews-tags {
    display: flex;
    justify-content: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-xl);
    flex-wrap: wrap;
}

.tag {
    background: rgba(125, 107, 108, 0.2);
    color: var(--text-primary);
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--border-radius-small);
    font-size: 0.9rem;
    border: 1px solid rgba(125, 107, 108, 0.3);
}

.reviews-carousel {
    position: relative;
    max-width: 800px;
    margin: 0 auto var(--spacing-lg);
    min-height: 200px;
}

.review-item {
    position: absolute;
    width: 100%;
    background: var(--bg-card);
    padding: var(--spacing-xl);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-small);
    opacity: 0;
    transform: translateX(50px);
    transition: all var(--transition-slow);
}

.review-item.active {
    opacity: 1;
    transform: translateX(0);
}

.review-rating {
    color: #ffc107;
    margin-bottom: var(--spacing-sm);
    text-align: center;
}

.review-text {
    font-size: 1.1rem;
    color: var(--text-secondary);
    text-align: center;
    line-height: 1.8;
    margin-bottom: var(--spacing-lg);
    font-style: italic;
}

.review-author {
    text-align: center;
    border-top: 1px solid rgba(125, 107, 108, 0.2);
    padding-top: var(--spacing-sm);
}

.author-name {
    font-weight: 600;
    color: var(--text-primary);
    margin-right: var(--spacing-sm);
}

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

.carousel-indicators {
    display: flex;
    justify-content: center;
    gap: var(--spacing-sm);
}

.indicator {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    border: none;
    background: rgba(125, 107, 108, 0.3);
    cursor: pointer;
    transition: background var(--transition-fast);
}

.indicator.active {
    background: var(--color-primary);
}

/* ===== 版本历史 ===== */
.versions {
    padding: var(--spacing-xxl) 0;
    background: var(--bg-primary);
}

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

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

.timeline-item {
    position: relative;
    margin-bottom: var(--spacing-xl);
    padding-left: 100px;
}

.timeline-item::before {
    content: '';
    position: absolute;
    left: 41px;
    top: 20px;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: var(--color-primary);
    border: 4px solid var(--bg-primary);
    box-shadow: 0 0 0 2px var(--color-primary);
}

.timeline-item.current::before {
    background: var(--gradient-primary);
    box-shadow: 0 0 0 2px var(--color-primary), 0 0 20px rgba(125, 107, 108, 0.5);
}

.timeline-date {
    position: absolute;
    left: -90px;
    top: 15px;
    color: var(--text-muted);
    font-size: 0.9rem;
    width: 80px;
    text-align: right;
}

.timeline-content {
    background: var(--bg-card);
    padding: var(--spacing-lg);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-small);
}

.version-title {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--spacing-sm);
}

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

.version-info span {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.version-features h4 {
    color: var(--color-primary);
    margin-bottom: var(--spacing-sm);
}

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

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

.version-features li::before {
    content: '▸';
    position: absolute;
    left: 0;
    color: var(--color-primary);
}

.version-note {
    background: rgba(76, 99, 125, 0.2);
    padding: var(--spacing-sm);
    border-radius: var(--border-radius-small);
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-bottom: var(--spacing-md);
    border-left: 4px solid var(--color-accent);
}

.version-note i {
    color: var(--color-accent);
    margin-right: var(--spacing-xs);
}

/* ===== 常见问题 ===== */
.faq {
    padding: var(--spacing-xxl) 0;
    background: var(--bg-secondary);
}

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

.faq-item {
    background: var(--bg-card);
    border-radius: var(--border-radius);
    margin-bottom: var(--spacing-md);
    box-shadow: var(--shadow-small);
    overflow: hidden;
}

.faq-question {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-lg);
    cursor: pointer;
    transition: background var(--transition-fast);
    border-bottom: 1px solid rgba(125, 107, 108, 0.1);
}

.faq-question:hover {
    background: rgba(125, 107, 108, 0.1);
}

.faq-question h3 {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-primary);
}

.faq-question i {
    color: var(--color-primary);
    transition: transform var(--transition-fast);
}

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

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

.faq-item.active .faq-answer {
    padding: var(--spacing-lg);
    max-height: 500px;
}

.faq-answer p {
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: var(--spacing-sm);
}

.faq-answer ul {
    list-style: none;
    margin-bottom: var(--spacing-sm);
}

.faq-answer li {
    position: relative;
    padding-left: var(--spacing-md);
    margin-bottom: var(--spacing-xs);
    color: var(--text-secondary);
}

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

.faq-answer strong {
    color: var(--text-primary);
}

/* ===== 底部信息 ===== */
.footer {
    background: var(--bg-dark);
    padding: var(--spacing-xxl) 0 var(--spacing-lg);
    border-top: 1px solid rgba(125, 107, 108, 0.2);
}

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

.footer-section h3,
.footer-section h4 {
    margin-bottom: var(--spacing-md);
}

.footer-title {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    font-weight: 700;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.footer-subtitle {
    color: var(--text-primary);
    font-size: 1.1rem;
    font-weight: 600;
}

.footer-description {
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: var(--spacing-md);
}

.footer-social {
    display: flex;
    gap: var(--spacing-sm);
}

.social-link {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background: rgba(125, 107, 108, 0.2);
    color: var(--text-secondary);
    border-radius: 50%;
    text-decoration: none;
    transition: all var(--transition-fast);
}

.social-link:hover {
    background: var(--color-primary);
    color: var(--text-primary);
    transform: translateY(-2px);
}

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

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

.footer-links a {
    color: var(--text-secondary);
    text-decoration: none;
    transition: color var(--transition-fast);
}

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

.footer-bottom {
    border-top: 1px solid rgba(125, 107, 108, 0.2);
    padding-top: var(--spacing-lg);
    text-align: center;
}

.copyright {
    color: var(--text-muted);
    font-size: 0.9rem;
}

.website-info {
    margin-left: var(--spacing-sm);
}

.website-info a {
    color: var(--color-primary);
    text-decoration: none;
}

.website-info a:hover {
    text-decoration: underline;
}

/* ===== 响应式设计 ===== */
@media (max-width: 768px) {
    /* 导航栏 */
    .nav-menu {
        position: fixed;
        left: -100%;
        top: 70px;
        flex-direction: column;
        background-color: rgba(6, 5, 6, 0.95);
        backdrop-filter: blur(10px);
        width: 100%;
        text-align: center;
        transition: 0.3s;
        box-shadow: var(--shadow-medium);
        padding: var(--spacing-lg) 0;
        gap: var(--spacing-md);
    }

    .nav-menu.active {
        left: 0;
    }

    .hamburger {
        display: flex;
    }

    .hamburger.active .bar:nth-child(2) {
        opacity: 0;
    }

    .hamburger.active .bar:nth-child(1) {
        transform: translateY(7px) rotate(45deg);
    }

    .hamburger.active .bar:nth-child(3) {
        transform: translateY(-7px) rotate(-45deg);
    }

    /* 英雄区域简化响应式 */
    .hero {
        min-height: 70vh;
    }

    .hero-content {
        max-width: 100%;
    }

    .title-main {
        font-size: clamp(2rem, 5vw, 3rem);
    }

    .title-sub {
        font-size: clamp(0.9rem, 2vw, 1.2rem);
        letter-spacing: 1px;
    }

    .hero-description {
        font-size: 1rem;
    }

    .hero-features {
        flex-direction: row;
        justify-content: center;
        gap: var(--spacing-xs);
        flex-wrap: wrap;
    }

    .feature-item {
        flex: 0 1 calc(33.333% - var(--spacing-xs));
        min-width: 0;
        text-align: center;
        padding: var(--spacing-xs) var(--spacing-sm);
        font-size: 0.85rem;
    }

    .feature-item i {
        font-size: 1rem;
    }

    .feature-item span {
        white-space: nowrap;
        overflow: hidden;
        text-overflow: ellipsis;
    }

    .hero-version {
        flex-direction: column;
        gap: var(--spacing-xs);
    }

    .download-btn {
        font-size: 1rem;
        padding: var(--spacing-sm) var(--spacing-lg);
    }

    .btn-content {
        align-items: center;
        text-align: center;
    }

    /* 版本历史 */
    .timeline::before {
        left: 20px;
    }

    .timeline-item {
        padding-left: 50px;
    }

    .timeline-item::before {
        left: 11px;
    }

    .timeline-date {
        position: static;
        width: auto;
        text-align: left;
        margin-bottom: var(--spacing-xs);
        color: var(--color-primary);
        font-weight: 600;
    }

    /* 其他区域 */
    .section-title {
        font-size: 2rem;
    }

    .reviews-stats {
        flex-direction: row;
        justify-content: center;
        gap: var(--spacing-sm);
        flex-wrap: wrap;
    }

    .stats-item {
        flex: 0 1 calc(33.333% - var(--spacing-sm));
        min-width: 0;
        padding: var(--spacing-md) var(--spacing-sm);
    }

    .stats-number {
        font-size: 2rem;
    }

    .stats-label {
        font-size: 0.8rem;
    }

    .gallery-grid {
        grid-template-columns: 1fr;
    }

    .news-grid {
        grid-template-columns: 1fr;
    }

    .modal-content {
        width: 95%;
    }

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

@media (max-width: 480px) {
    .container {
        padding: 0 var(--spacing-xs);
    }

    .hero {
        min-height: 60vh;
    }

    .title-main {
        font-size: clamp(1.8rem, 4vw, 2.5rem);
    }

    .title-sub {
        font-size: clamp(0.8rem, 2vw, 1rem);
        letter-spacing: 1px;
    }

    .hero-description {
        font-size: 0.9rem;
    }

    .hero-features {
        gap: calc(var(--spacing-xs) / 2);
    }

    .feature-item {
        flex: 0 1 calc(33.333% - calc(var(--spacing-xs) / 2));
        padding: calc(var(--spacing-xs) / 2) var(--spacing-xs);
        font-size: 0.8rem;
    }

    .feature-item i {
        font-size: 0.9rem;
    }

    .version-badge, .version-date, .version-rating {
        font-size: 0.8rem;
    }

    .section-title {
        font-size: 1.8rem;
    }

    .reviews-stats {
        gap: calc(var(--spacing-sm) / 2);
    }

    .stats-item {
        flex: 0 1 calc(33.333% - calc(var(--spacing-sm) / 2));
        padding: var(--spacing-sm) calc(var(--spacing-sm) / 2);
    }

    .stats-number {
        font-size: 1.8rem;
    }

    .stats-label {
        font-size: 0.75rem;
    }

    .download-btn .btn-content {
        align-items: center;
    }

    .version-info {
        flex-direction: column;
        gap: var(--spacing-xs);
    }

    .back-to-top {
        bottom: var(--spacing-sm);
        right: var(--spacing-sm);
        width: 45px;
        height: 45px;
    }
}

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

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

/* 滚动性能优化 */
.hero::before,
.gallery-item img,
.modal-content {
    will-change: transform;
}

/* 减少重绘 */
.btn,
.nav-link,
.gallery-item,
.news-item,
.faq-question,
.feature-item,
.download-btn {
    will-change: transform, box-shadow;
}

/* 硬件加速 */
.back-to-top,
.modal,
.nav-menu,
.review-item,
.title-main {
    transform: translateZ(0);
}