/* ===== 特工17 Agent17 - 全新设计系统 ===== */

/* CSS Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* 新的配色方案 - 深色科技风 */
    --primary-bg: #0d1117;
    --secondary-bg: #161b22;
    --tertiary-bg: #21262d;
    --accent-bg: #1f2937;
    
    /* 主色调 */
    --primary-color: #00d4ff;
    --secondary-color: #7c3aed;
    --accent-color: #f59e0b;
    --success-color: #10b981;
    --warning-color: #f59e0b;
    --error-color: #ef4444;
    
    /* 文字颜色 */
    --text-primary: #f0f6fc;
    --text-secondary: #8b949e;
    --text-muted: #6e7681;
    --text-inverse: #0d1117;
    
    /* 边框和分割线 */
    --border-color: #30363d;
    --border-hover: #484f58;
    --divider-color: #21262d;
    
    /* 阴影 */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    --shadow-glow: 0 0 20px rgba(0, 212, 255, 0.3);
    
    /* 渐变 */
    --gradient-primary: linear-gradient(135deg, #00d4ff 0%, #7c3aed 100%);
    --gradient-secondary: linear-gradient(135deg, #1f2937 0%, #374151 100%);
    --gradient-hero: linear-gradient(135deg, #0d1117 0%, #1f2937 50%, #161b22 100%);
    
    /* 圆角 */
    --radius-sm: 6px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
    --radius-full: 9999px;
    
    /* 间距 */
    --space-xs: 0.25rem;
    --space-sm: 0.5rem;
    --space-md: 1rem;
    --space-lg: 1.5rem;
    --space-xl: 2rem;
    --space-2xl: 3rem;
    --space-3xl: 4rem;
    
    /* 字体 */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-mono: 'JetBrains Mono', 'Fira Code', monospace;
    
    /* 动画 */
    --transition-fast: 0.15s ease-out;
    --transition-normal: 0.3s ease-out;
    --transition-slow: 0.5s ease-out;
    
    /* Z-index */
    --z-dropdown: 1000;
    --z-sticky: 1020;
    --z-fixed: 1030;
    --z-modal: 1040;
    --z-popover: 1050;
    --z-tooltip: 1060;
}

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

body {
    font-family: var(--font-family);
    line-height: 1.6;
    color: var(--text-primary);
    background: var(--primary-bg);
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

::-webkit-scrollbar-track {
    background: var(--secondary-bg);
}

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

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

/* ===== 头部导航 ===== */
.main-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(13, 17, 23, 0.8);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-color);
    z-index: var(--z-fixed);
    transition: var(--transition-normal);
}

.header-wrapper {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-lg);
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 70px;
}

.logo-section {
    display: flex;
    align-items: center;
}

.brand-logo {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    text-decoration: none;
    transition: var(--transition-normal);
}

.brand-logo:hover {
    transform: translateY(-1px);
}

.logo-icon {
    width: 40px;
    height: 40px;
    background: var(--gradient-primary);
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1.2rem;
}

.logo-text {
    display: flex;
    flex-direction: column;
    line-height: 1.2;
}

.brand-name {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
}

.brand-subtitle {
    font-size: 0.8rem;
    color: var(--text-secondary);
    font-weight: 500;
}

.main-navigation {
    display: flex;
    align-items: center;
}

.nav-list {
    display: flex;
    list-style: none;
    gap: var(--space-xl);
    margin: 0;
    padding: 0;
}

.nav-link {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    font-size: 0.95rem;
    transition: var(--transition-normal);
    position: relative;
    padding: var(--space-sm) 0;
}

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

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--gradient-primary);
    transition: var(--transition-normal);
}

.nav-link:hover::after {
    width: 100%;
}

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

.download-cta {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    background: var(--gradient-primary);
    color: white;
    padding: var(--space-sm) var(--space-lg);
    border-radius: var(--radius-full);
    text-decoration: none;
    font-weight: 600;
    font-size: 0.9rem;
    transition: var(--transition-normal);
    box-shadow: var(--shadow-md);
}

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

.mobile-toggle {
    display: none;
    flex-direction: column;
    gap: 4px;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--space-sm);
}

.hamburger-line {
    width: 24px;
    height: 2px;
    background: var(--text-primary);
    transition: var(--transition-normal);
}

/* ===== 英雄区域 ===== */
.hero-banner {
    min-height: 100vh;
    background: var(--gradient-hero);
    position: relative;
    display: flex;
    align-items: center;
    overflow: hidden;
}

.hero-background {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 1;
}

.hero-particles {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(circle at 20% 80%, rgba(0, 212, 255, 0.1) 0%, transparent 50%),
                radial-gradient(circle at 80% 20%, rgba(124, 58, 237, 0.1) 0%, transparent 50%);
    animation: float 20s ease-in-out infinite;
}

@keyframes float {
    0%, 100% { transform: translateY(0px) rotate(0deg); }
    50% { transform: translateY(-20px) rotate(180deg); }
}

.hero-container {
    position: relative;
    z-index: 2;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-lg);
    width: 100%;
}

.hero-content {
    text-align: center;
    max-width: 800px;
    margin: 0 auto;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    background: rgba(0, 212, 255, 0.1);
    color: var(--primary-color);
    padding: var(--space-sm) var(--space-lg);
    border-radius: var(--radius-full);
    font-size: 0.9rem;
    font-weight: 600;
    margin-bottom: var(--space-xl);
    border: 1px solid rgba(0, 212, 255, 0.2);
}

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

.title-main {
    display: block;
    font-size: 4rem;
    font-weight: 800;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: var(--space-sm);
}

.title-sub {
    display: block;
    font-size: 1.5rem;
    color: var(--text-secondary);
    font-weight: 500;
}

.hero-description {
    font-size: 1.2rem;
    color: var(--text-secondary);
    margin-bottom: var(--space-2xl);
    line-height: 1.7;
}

.version-info {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-xl);
    margin-bottom: var(--space-2xl);
    flex-wrap: wrap;
}

.version-badge {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-xs);
}

.version-label {
    font-size: 0.8rem;
    color: var(--text-muted);
    font-weight: 500;
}

.version-number {
    font-size: 1.1rem;
    color: var(--primary-color);
    font-weight: 700;
    font-family: var(--font-mono);
}

.update-info {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.hero-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: var(--space-lg);
    margin-bottom: var(--space-2xl);
}

.stat-item {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    background: var(--secondary-bg);
    padding: var(--space-lg);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-color);
    transition: var(--transition-normal);
}

.stat-item:hover {
    border-color: var(--primary-color);
    transform: translateY(-2px);
}

.stat-icon {
    width: 40px;
    height: 40px;
    background: var(--gradient-primary);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1.1rem;
}

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

.stat-number {
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--text-primary);
}

.stat-label {
    font-size: 0.8rem;
    color: var(--text-secondary);
}

.hero-actions {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-lg);
    margin-bottom: var(--space-2xl);
    flex-wrap: wrap;
}

.primary-btn {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    background: var(--gradient-primary);
    color: white;
    padding: var(--space-lg) var(--space-2xl);
    border-radius: var(--radius-full);
    text-decoration: none;
    font-weight: 700;
    font-size: 1.1rem;
    transition: var(--transition-normal);
    box-shadow: var(--shadow-lg);
    position: relative;
    overflow: hidden;
}

.primary-btn:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-xl), var(--shadow-glow);
}

.btn-shine {
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: left 0.5s;
}

.primary-btn:hover .btn-shine {
    left: 100%;
}

.secondary-btn {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    background: transparent;
    color: var(--text-primary);
    padding: var(--space-lg) var(--space-2xl);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-full);
    text-decoration: none;
    font-weight: 600;
    font-size: 1.1rem;
    transition: var(--transition-normal);
}

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

.platform-support {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-xl);
    flex-wrap: wrap;
}

.platform-item {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    color: var(--text-secondary);
    font-size: 0.9rem;
    font-weight: 500;
}

.platform-item i {
    font-size: 1.2rem;
    color: var(--primary-color);
}

/* ===== 主要内容区域 ===== */
.main-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-lg);
}

.content-section {
    padding: var(--space-3xl) 0;
}

.section-header {
    text-align: center;
    margin-bottom: var(--space-3xl);
}

.section-title {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-md);
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: var(--space-md);
}

.section-title i {
    color: var(--primary-color);
    font-size: 2rem;
}

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

/* ===== 新闻区域 ===== */
.news-container {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: var(--space-xl);
}

.news-card {
    background: var(--secondary-bg);
    border-radius: var(--radius-xl);
    overflow: hidden;
    border: 1px solid var(--border-color);
    transition: var(--transition-normal);
    position: relative;
}

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

.news-card.featured {
    grid-row: span 2;
}

.news-image {
    height: 200px;
    background: var(--gradient-secondary);
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    border-radius: var(--radius-lg) var(--radius-lg) 0 0;
}

.news-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition-normal);
}

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

.news-card.featured .news-image {
    height: 300px;
}

.news-category-badge {
    position: absolute;
    top: var(--space-md);
    left: var(--space-md);
    padding: var(--space-sm) var(--space-md);
    border-radius: var(--radius-full);
    font-size: 0.8rem;
    font-weight: 600;
    color: white;
}

.news-category-badge.archive {
    background: var(--success-color);
}

.news-category-badge.codes {
    background: var(--accent-color);
}

.news-category-badge.story {
    background: var(--secondary-color);
}

.news-content {
    padding: var(--space-xl);
}

.news-meta {
    display: flex;
    align-items: center;
    gap: var(--space-lg);
    margin-bottom: var(--space-md);
    font-size: 0.85rem;
    color: var(--text-muted);
}

.news-meta i {
    color: var(--primary-color);
}

.news-title {
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: var(--space-md);
    line-height: 1.4;
}

.news-card.featured .news-title {
    font-size: 1.5rem;
}

.news-excerpt {
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: var(--space-lg);
}

.news-link {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 600;
    font-size: 0.9rem;
    transition: var(--transition-normal);
}

.news-link:hover {
    gap: var(--space-md);
}

/* ===== 游戏截图区域 ===== */
.gallery-showcase {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: var(--space-xl);
}

.gallery-main {
    display: flex;
}

.gallery-item.large {
    width: 100%;
    aspect-ratio: 16/9;
}

.gallery-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-md);
}

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

.gallery-item:hover {
    transform: scale(1.02);
}

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

.gallery-item:hover img {
    filter: brightness(0.8);
}

.gallery-overlay {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    background: linear-gradient(transparent, rgba(0, 0, 0, 0.8));
    padding: var(--space-lg);
    transform: translateY(100%);
    transition: var(--transition-normal);
}

.gallery-item:hover .gallery-overlay {
    transform: translateY(0);
}

.gallery-info {
    margin-bottom: var(--space-md);
}

.gallery-title {
    color: white;
    font-weight: 700;
    margin-bottom: var(--space-xs);
    font-size: 1.1rem;
}

.gallery-desc {
    color: rgba(255, 255, 255, 0.8);
    font-size: 0.9rem;
}

.gallery-expand {
    position: absolute;
    top: var(--space-md);
    right: var(--space-md);
    width: 40px;
    height: 40px;
    background: rgba(0, 0, 0, 0.5);
    border: none;
    border-radius: var(--radius-full);
    color: white;
    cursor: pointer;
    transition: var(--transition-normal);
    opacity: 0;
}

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

.gallery-expand:hover {
    background: var(--primary-color);
}

/* ===== 版本历史区域 ===== */
.version-timeline {
    position: relative;
    max-width: 800px;
    margin: 0 auto;
}

.version-timeline::before {
    content: '';
    position: absolute;
    left: 20px;
    top: 0;
    bottom: 0;
    width: 2px;
    background: var(--border-color);
}

.version-item {
    position: relative;
    margin-bottom: var(--space-2xl);
    padding-left: 60px;
}

.version-item.current {
    margin-bottom: var(--space-3xl);
}

.version-marker {
    position: absolute;
    left: 0;
    top: 0;
    width: 40px;
    height: 40px;
    background: var(--secondary-bg);
    border: 3px solid var(--border-color);
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 2;
}

.version-item.current .version-marker {
    background: var(--gradient-primary);
    border-color: var(--primary-color);
}

.version-badge {
    position: absolute;
    top: -10px;
    right: -10px;
    background: var(--accent-color);
    color: white;
    padding: 2px 8px;
    border-radius: var(--radius-full);
    font-size: 0.7rem;
    font-weight: 600;
}

.version-content {
    background: var(--secondary-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xl);
    padding: var(--space-xl);
    transition: var(--transition-normal);
}

.version-content:hover {
    border-color: var(--primary-color);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

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

.version-title {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
    font-family: var(--font-mono);
}

.version-meta {
    display: flex;
    align-items: center;
    gap: var(--space-lg);
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.version-changes {
    margin-bottom: var(--space-lg);
}

.change-type {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    font-weight: 600;
    margin-bottom: var(--space-md);
    padding: var(--space-sm) var(--space-md);
    border-radius: var(--radius-md);
    font-size: 0.9rem;
}

.change-type.bug-fix {
    background: rgba(239, 68, 68, 0.1);
    color: var(--error-color);
}

.change-type.patch {
    background: rgba(245, 158, 11, 0.1);
    color: var(--warning-color);
}

.change-type.major {
    background: rgba(16, 185, 129, 0.1);
    color: var(--success-color);
}

.change-list {
    list-style: none;
    padding-left: var(--space-lg);
}

.change-list li {
    color: var(--text-secondary);
    margin-bottom: var(--space-sm);
    position: relative;
    line-height: 1.5;
}

.change-list li::before {
    content: '•';
    color: var(--primary-color);
    position: absolute;
    left: -var(--space-lg);
}

.version-download {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    background: var(--gradient-primary);
    color: white;
    padding: var(--space-md) var(--space-lg);
    border-radius: var(--radius-full);
    text-decoration: none;
    font-weight: 600;
    font-size: 0.9rem;
    transition: var(--transition-normal);
}

.version-download:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

/* ===== 用户评价区域 ===== */
.reviews-overview {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: var(--space-2xl);
    margin-bottom: var(--space-2xl);
    background: var(--secondary-bg);
    padding: var(--space-2xl);
    border-radius: var(--radius-xl);
    border: 1px solid var(--border-color);
}

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

.rating-score {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-md);
}

.score-number {
    font-size: 4rem;
    font-weight: 800;
    color: var(--primary-color);
    line-height: 1;
}

.rating-stars {
    display: flex;
    gap: var(--space-xs);
}

.rating-stars i {
    color: #fbbf24;
    font-size: 1.5rem;
}

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

.rating-breakdown {
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
}

.rating-bar-item {
    display: flex;
    align-items: center;
    gap: var(--space-md);
}

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

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

.rating-fill {
    height: 100%;
    background: var(--gradient-primary);
    border-radius: var(--radius-full);
    transition: width 1s ease-out;
}

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

.review-tags {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-sm);
    justify-content: center;
    margin-bottom: var(--space-2xl);
}

.review-tag {
    background: var(--secondary-bg);
    color: var(--text-secondary);
    padding: var(--space-sm) var(--space-md);
    border-radius: var(--radius-full);
    font-size: 0.85rem;
    border: 1px solid var(--border-color);
    transition: var(--transition-normal);
}

.review-tag:hover {
    background: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
}

.reviews-showcase {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--space-xl);
    margin-bottom: var(--space-2xl);
}

.review-card {
    background: var(--secondary-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xl);
    padding: var(--space-xl);
    transition: var(--transition-normal);
}

.review-card:hover {
    border-color: var(--primary-color);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

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

.reviewer-info {
    display: flex;
    align-items: center;
    gap: var(--space-md);
}

.reviewer-avatar {
    width: 40px;
    height: 40px;
    background: var(--gradient-primary);
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
}

.reviewer-details {
    display: flex;
    flex-direction: column;
    gap: var(--space-xs);
}

.reviewer-name {
    font-weight: 600;
    color: var(--text-primary);
}

.review-rating {
    display: flex;
    gap: 2px;
}

.review-rating i {
    color: #fbbf24;
    font-size: 0.8rem;
}

.review-date {
    color: var(--text-muted);
    font-size: 0.8rem;
}

.review-content {
    color: var(--text-secondary);
    line-height: 1.6;
}

.cta-banner {
    background: var(--gradient-hero);
    border-radius: var(--radius-xl);
    padding: var(--space-3xl);
    text-align: center;
    border: 1px solid var(--border-color);
}

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

.cta-title {
    font-size: 2rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: var(--space-md);
}

.cta-description {
    font-size: 1.1rem;
    color: var(--text-secondary);
    margin-bottom: var(--space-2xl);
}

.cta-button {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    background: var(--gradient-primary);
    color: white;
    padding: var(--space-lg) var(--space-2xl);
    border-radius: var(--radius-full);
    text-decoration: none;
    font-weight: 700;
    font-size: 1.1rem;
    transition: var(--transition-normal);
    box-shadow: var(--shadow-lg);
}

.cta-button:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-xl), var(--shadow-glow);
}

/* ===== 页脚 ===== */
.main-footer {
    background: var(--secondary-bg);
    border-top: 1px solid var(--border-color);
    margin-top: var(--space-3xl);
}

.footer-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: var(--space-3xl) var(--space-lg) var(--space-xl);
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: var(--space-2xl);
    margin-bottom: var(--space-2xl);
}

.footer-brand {
    display: flex;
    flex-direction: column;
    gap: var(--space-lg);
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
}

.footer-logo i {
    color: var(--primary-color);
}

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

.footer-social {
    display: flex;
    gap: var(--space-md);
}

.social-link {
    width: 40px;
    height: 40px;
    background: var(--tertiary-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
    text-decoration: none;
    transition: var(--transition-normal);
}

.social-link:hover {
    background: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
}

.footer-title {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--space-lg);
}

.footer-nav {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
}

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

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

.contact-info {
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
}

.contact-item {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.contact-item i {
    color: var(--primary-color);
    width: 16px;
}

.footer-bottom {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding-top: var(--space-xl);
    border-top: 1px solid var(--border-color);
    flex-wrap: wrap;
    gap: var(--space-md);
}

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

.footer-legal {
    display: flex;
    gap: var(--space-lg);
}

.footer-legal a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.9rem;
    transition: var(--transition-normal);
}

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

/* ===== 返回顶部按钮 ===== */
.back-to-top {
    position: fixed;
    bottom: var(--space-xl);
    right: var(--space-xl);
    width: 50px;
    height: 50px;
    background: var(--gradient-primary);
    color: white;
    border: none;
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: var(--transition-normal);
    opacity: 0;
    visibility: hidden;
    z-index: var(--z-fixed);
    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), var(--shadow-glow);
}

/* ===== 响应式设计 ===== */
@media (max-width: 1024px) {
    .news-container {
        grid-template-columns: 1fr 1fr;
    }
    
    .news-card.featured {
        grid-column: span 2;
    }
    
    .gallery-showcase {
        grid-template-columns: 1fr;
    }
    
    .gallery-grid {
        grid-template-columns: repeat(3, 1fr);
    }
    
    .footer-grid {
        grid-template-columns: 1fr 1fr;
    }
}

@media (max-width: 768px) {
    .header-wrapper {
        padding: 0 var(--space-md);
    }
    
    .main-navigation {
        display: none;
    }
    
    .mobile-toggle {
        display: flex;
    }
    
    .title-main {
        font-size: 2.5rem;
    }
    
    .title-sub {
        font-size: 1.2rem;
    }
    
    .hero-description {
        font-size: 1rem;
    }
    
    .version-info {
        flex-direction: column;
        gap: var(--space-md);
    }
    
    .hero-stats {
        grid-template-columns: 1fr;
    }
    
    .hero-actions {
        flex-direction: column;
        align-items: stretch;
    }
    
    .primary-btn,
    .secondary-btn {
        justify-content: center;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .news-container {
        grid-template-columns: 1fr;
    }
    
    .news-card.featured {
        grid-column: span 1;
    }
    
    .gallery-grid {
        grid-template-columns: 1fr 1fr;
    }
    
    .reviews-overview {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .reviews-showcase {
        grid-template-columns: 1fr;
    }
    
    .footer-grid {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .footer-bottom {
        flex-direction: column;
        text-align: center;
    }
    
    .version-timeline::before {
        left: 15px;
    }
    
    .version-item {
        padding-left: 40px;
    }
    
    .version-marker {
        width: 30px;
        height: 30px;
    }
}

@media (max-width: 480px) {
    .main-content {
        padding: 0 var(--space-md);
    }
    
    .content-section {
        padding: var(--space-2xl) 0;
    }
    
    .title-main {
        font-size: 2rem;
    }
    
    .gallery-grid {
        grid-template-columns: 1fr;
    }
    
    .platform-support {
        flex-direction: column;
        gap: var(--space-md);
    }
}

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

@keyframes fadeInLeft {
    from {
        opacity: 0;
        transform: translateX(-30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes fadeInRight {
    from {
        opacity: 0;
        transform: translateX(30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

.fade-in-up {
    animation: fadeInUp 0.6s ease-out;
}

.fade-in-left {
    animation: fadeInLeft 0.6s ease-out;
}

.fade-in-right {
    animation: fadeInRight 0.6s ease-out;
}

/* ===== 工具类 ===== */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

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

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

.text-right {
    text-align: right;
}

.mb-0 { margin-bottom: 0; }
.mb-1 { margin-bottom: var(--space-xs); }
.mb-2 { margin-bottom: var(--space-sm); }
.mb-3 { margin-bottom: var(--space-md); }
.mb-4 { margin-bottom: var(--space-lg); }
.mb-5 { margin-bottom: var(--space-xl); }

.mt-0 { margin-top: 0; }
.mt-1 { margin-top: var(--space-xs); }
.mt-2 { margin-top: var(--space-sm); }
.mt-3 { margin-top: var(--space-md); }
.mt-4 { margin-top: var(--space-lg); }
.mt-5 { margin-top: var(--space-xl); }