/* ========================================
   CSS变量 - 主题配色
======================================== */
:root {
    /* 主要配色 */
    --primary-color: #89bfcb;
    --secondary-color: #d7d1c4;
    --accent-color: #7d9db9;
    --dark-color: #2f3034;
    
    /* 渐变色 */
    --gradient-primary: linear-gradient(135deg, #89bfcb, #7d9db9);
    --gradient-secondary: linear-gradient(135deg, #d7d1c4, #89bfcb);
    --gradient-hero: linear-gradient(135deg, rgba(47, 48, 52, 0.9), rgba(125, 157, 185, 0.8));
    
    /* 文字颜色 */
    --text-primary: #2f3034;
    --text-secondary: #5a5a5a;
    --text-light: #ffffff;
    --text-muted: #888888;
    
    /* 背景色 */
    --bg-primary: #ffffff;
    --bg-secondary: #f8f9fa;
    --bg-tertiary: #89bfcb0a;
    
    /* 阴影 */
    --shadow-light: 0 2px 10px rgba(47, 48, 52, 0.1);
    --shadow-medium: 0 4px 20px rgba(47, 48, 52, 0.15);
    --shadow-heavy: 0 8px 30px rgba(47, 48, 52, 0.2);
    
    /* 字体 */
    --font-primary: 'Noto Sans SC', sans-serif;
    --font-secondary: 'Roboto', sans-serif;
    
    /* 间距 */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    --spacing-3xl: 4rem;
    
    /* 圆角 */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
    
    /* 动画 */
    --transition-fast: 0.2s ease;
    --transition-medium: 0.3s ease;
    --transition-slow: 0.5s ease;
}

/* ========================================
   基础样式重置
======================================== */
* {
    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-color: var(--bg-primary);
    overflow-x: hidden;
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

a {
    color: var(--primary-color);
    text-decoration: none;
    transition: var(--transition-fast);
}

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

/* ========================================
   布局容器
======================================== */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--dark-color);
    text-align: center;
    margin-bottom: var(--spacing-lg);
    position: relative;
}

.section-title i {
    color: var(--primary-color);
    margin-right: var(--spacing-sm);
}

.section-subtitle {
    font-size: 1.125rem;
    color: var(--text-secondary);
    text-align: center;
    margin-bottom: var(--spacing-2xl);
}

/* ========================================
   按钮样式
======================================== */
.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md) var(--spacing-xl);
    font-size: 1rem;
    font-weight: 600;
    text-decoration: none;
    border-radius: var(--radius-lg);
    border: none;
    cursor: pointer;
    transition: var(--transition-medium);
    position: relative;
    overflow: hidden;
}

.btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
    transition: var(--transition-medium);
}

.btn:hover::before {
    left: 100%;
}

.btn-primary {
    background: var(--gradient-primary);
    color: var(--text-light);
    box-shadow: var(--shadow-medium);
}

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

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

.btn-secondary:hover {
    background: var(--primary-color);
    color: var(--text-light);
}

.btn-info {
    display: block;
    font-size: 0.75rem;
    font-weight: 400;
    opacity: 0.9;
    margin-top: 2px;
}

/* ========================================
   头部导航
======================================== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    z-index: 1000;
    box-shadow: var(--shadow-light);
    transition: var(--transition-medium);
}

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

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

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

.logo-img {
    width: 32px;
    height: 32px;
    border-radius: var(--radius-sm);
}

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

.nav-link {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-sm) var(--spacing-md);
    color: var(--text-primary);
    font-weight: 500;
    border-radius: var(--radius-md);
    transition: var(--transition-fast);
}

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

.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(--dark-color);
    border-radius: 2px;
    transition: var(--transition-fast);
}

/* ========================================
   英雄区域
======================================== */
.hero {
    min-height: 90vh;
    display: flex;
    align-items: center;
    background: var(--gradient-hero), url('img/游戏截图1.webp') center/cover;
    position: relative;
    margin-top: 80px;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(47, 48, 52, 0.7);
}

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

.hero-content {
    max-width: 600px;
    color: var(--text-light);
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 700;
    margin-bottom: calc(var(--spacing-md) * 0.7);
    line-height: 1.2;
}

.hero-subtitle {
    color: var(--primary-color);
    font-style: italic;
}

.hero-version {
    font-size: 1.125rem;
    color: var(--secondary-color);
    margin-bottom: calc(var(--spacing-lg) * 0.7);
    font-weight: 500;
}

.hero-description {
    font-size: 1.125rem;
    margin-bottom: calc(var(--spacing-xl) * 0.7);
    line-height: 1.7;
}

.hero-features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
    gap: calc(var(--spacing-md) * 0.7);
    margin-bottom: calc(var(--spacing-2xl) * 0.7);
}

.feature {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm);
    background: rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-md);
    backdrop-filter: blur(5px);
}

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

.hero-buttons {
    display: flex;
    flex-wrap: wrap;
    gap: calc(var(--spacing-lg) * 0.7);
    margin-bottom: calc(var(--spacing-xl) * 0.7);
}

.hero-release {
    color: var(--secondary-color);
    font-size: 0.9rem;
}

/* ========================================
   新闻动态区
======================================== */
.news {
    padding: var(--spacing-3xl) 0;
    background: var(--bg-secondary);
}

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

.news-card {
    background: var(--bg-primary);
    padding: var(--spacing-xl);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-light);
    transition: var(--transition-medium);
}

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

.news-date {
    color: var(--primary-color);
    font-size: 0.9rem;
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
}

.news-title {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: var(--spacing-md);
    color: var(--dark-color);
}

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

.news-link {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    color: var(--primary-color);
    font-weight: 600;
    transition: var(--transition-fast);
}

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

/* ========================================
   媒体画廊
======================================== */
.gallery {
    padding: var(--spacing-3xl) 0;
}

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

.gallery-item {
    position: relative;
    border-radius: var(--radius-lg);
    overflow: hidden;
    cursor: pointer;
    transition: var(--transition-medium);
}

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

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

.gallery-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(47, 48, 52, 0.7);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: var(--transition-medium);
}

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

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

/* 图片模态框 */
.gallery-modal {
    display: none;
    position: fixed;
    z-index: 2000;
    padding-top: 50px;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0,0,0,0.9);
}

.gallery-modal-content {
    margin: auto;
    display: block;
    width: 80%;
    max-width: 700px;
    animation: zoom 0.6s;
}

.gallery-close {
    position: absolute;
    top: 15px;
    right: 35px;
    color: #f1f1f1;
    font-size: 40px;
    font-weight: bold;
    cursor: pointer;
    transition: var(--transition-fast);
}

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

@keyframes zoom {
    from {transform:scale(0)}
    to {transform:scale(1)}
}

/* ========================================
   用户评价区
======================================== */
.reviews {
    padding: var(--spacing-3xl) 0;
    background: var(--bg-secondary);
}

.reviews-stats {
    display: flex;
    justify-content: center;
    gap: var(--spacing-3xl);
    margin-bottom: var(--spacing-2xl);
    flex-wrap: wrap;
}

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

.rating-score {
    font-size: 3rem;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: var(--spacing-sm);
}

.rating-stars {
    margin-bottom: var(--spacing-sm);
}

.rating-stars i {
    color: #ffc107;
    font-size: 1.5rem;
    margin: 0 2px;
}

.rating-count {
    color: var(--text-secondary);
}

.rating-tags {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
    justify-content: center;
    align-items: center;
}

.tag {
    background: var(--primary-color);
    color: var(--text-light);
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-md);
    font-size: 0.9rem;
    font-weight: 500;
}

.reviews-carousel {
    position: relative;
    max-width: 800px;
    margin: 0 auto var(--spacing-xl) auto;
    overflow: hidden;
}

.review-card {
    background: var(--bg-primary);
    padding: var(--spacing-2xl);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-medium);
    text-align: center;
    display: none;
}

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

.review-stars {
    margin-bottom: var(--spacing-lg);
}

.review-stars i {
    color: #ffc107;
    font-size: 1.2rem;
    margin: 0 2px;
}

.review-text {
    font-size: 1.125rem;
    line-height: 1.7;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-lg);
    font-style: italic;
}

.review-author strong {
    color: var(--dark-color);
    margin-right: var(--spacing-sm);
}

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

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

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

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

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

.dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: var(--text-muted);
    cursor: pointer;
    transition: var(--transition-fast);
}

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

/* ========================================
   版本历史
======================================== */
.versions {
    padding: var(--spacing-3xl) 0;
}

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

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

.timeline-item {
    position: relative;
    margin-bottom: var(--spacing-3xl);
}

.timeline-marker {
    position: absolute;
    left: 50%;
    width: 16px;
    height: 16px;
    background: var(--primary-color);
    border-radius: 50%;
    transform: translateX(-50%);
    z-index: 2;
}

.timeline-marker.current {
    background: var(--accent-color);
    box-shadow: 0 0 0 4px rgba(125, 157, 185, 0.3);
}

.timeline-content {
    background: var(--bg-primary);
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-light);
    width: calc(50% - 30px);
}

.timeline-item:nth-child(odd) .timeline-content {
    margin-left: calc(50% + 30px);
}

.timeline-item:nth-child(even) .timeline-content {
    margin-right: calc(50% + 30px);
}

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

.version-number {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--dark-color);
}

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

.version-badge {
    background: var(--primary-color);
    color: var(--text-light);
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-sm);
    font-size: 0.75rem;
    font-weight: 600;
}

.version-info {
    display: flex;
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-md);
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.version-description ul {
    list-style: none;
    padding-left: 0;
}

.version-description li {
    position: relative;
    padding-left: var(--spacing-lg);
    margin-bottom: var(--spacing-sm);
}

.version-description li::before {
    content: '•';
    position: absolute;
    left: 0;
    color: var(--primary-color);
    font-weight: bold;
}

.version-download {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    background: var(--gradient-primary);
    color: var(--text-light);
    padding: var(--spacing-sm) var(--spacing-lg);
    border-radius: var(--radius-md);
    font-weight: 600;
    margin-top: var(--spacing-md);
    transition: var(--transition-fast);
}

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

/* ========================================
   常见问题
======================================== */
.faq {
    padding: var(--spacing-3xl) 0;
    background: var(--bg-secondary);
}

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

.faq-item {
    background: var(--bg-primary);
    margin-bottom: var(--spacing-lg);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-light);
    transition: var(--transition-medium);
}

.faq-item:hover {
    box-shadow: var(--shadow-medium);
}

.faq-question {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-xl);
    cursor: pointer;
    transition: var(--transition-fast);
}

.faq-question:hover {
    background: var(--bg-tertiary);
}

.faq-question h3 {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--dark-color);
    margin: 0;
}

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

.faq-toggle {
    background: var(--primary-color);
    color: var(--text-light);
    width: 30px;
    height: 30px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition-fast);
}

.faq-toggle i {
    font-size: 0.9rem;
    transition: var(--transition-fast);
}

.faq-item.active .faq-toggle {
    transform: rotate(45deg);
}

.faq-answer {
    padding: 0 var(--spacing-xl) var(--spacing-xl) var(--spacing-xl);
    color: var(--text-secondary);
    line-height: 1.6;
    max-height: 0;
    overflow: hidden;
    transition: var(--transition-medium);
}

.faq-item.active .faq-answer {
    max-height: 200px;
}

/* ========================================
   底部信息
======================================== */
.footer {
    background: var(--dark-color);
    color: var(--text-light);
    padding: var(--spacing-3xl) 0 var(--spacing-xl) 0;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-2xl);
    margin-bottom: var(--spacing-2xl);
}

.footer-section h3 {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-lg);
    color: var(--primary-color);
}

.footer-logo {
    width: 24px;
    height: 24px;
}

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

.footer-section p {
    color: var(--text-muted);
    line-height: 1.6;
}

.footer-section ul {
    list-style: none;
}

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

.footer-section ul li a {
    color: var(--text-muted);
    transition: var(--transition-fast);
}

.footer-section ul li a:hover {
    color: var(--primary-color);
}

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

.partner-link {
    color: #3a3a3a;
    font-size: 0.8rem;
    transition: var(--transition-fast);
}

.partner-link:hover {
    color: #4a4a4a;
}

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

/* ========================================
   返回顶部按钮
======================================== */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    background: var(--primary-color);
    color: var(--text-light);
    border: none;
    border-radius: 50%;
    width: 50px;
    height: 50px;
    cursor: pointer;
    box-shadow: var(--shadow-medium);
    transition: var(--transition-medium);
    opacity: 0;
    visibility: hidden;
    z-index: 1000;
}

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

.back-to-top:hover {
    background: var(--accent-color);
    transform: translateY(-2px);
}

/* ========================================
   响应式设计
======================================== */

/* 平板设备 */
@media (max-width: 768px) {
    :root {
        font-size: 14px;
    }
    
    .nav-menu {
        position: fixed;
        left: -100%;
        top: 80px;
        flex-direction: column;
        background: var(--bg-primary);
        width: 100%;
        text-align: center;
        transition: var(--transition-medium);
        box-shadow: var(--shadow-medium);
        padding: var(--spacing-lg) 0;
    }
    
    .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);
    }
    
    .hero-title {
        font-size: 2.5rem;
    }
    
    .hero-features {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .hero-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .timeline::before {
        left: 20px;
    }
    
    .timeline-marker {
        left: 20px;
    }
    
    .timeline-content {
        width: calc(100% - 60px);
        margin-left: 60px !important;
        margin-right: 0 !important;
    }
    
    .reviews-stats {
        flex-direction: column;
        gap: var(--spacing-xl);
    }
    
    .section-title {
        font-size: 2rem;
    }
}

/* 手机设备 */
@media (max-width: 480px) {
    .container {
        padding: 0 var(--spacing-md);
    }
    
    .hero-title {
        font-size: 2rem;
    }
    
    .hero-features {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .news-grid {
        grid-template-columns: 1fr;
    }
    
    .gallery-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .footer-partners {
        flex-direction: column;
        gap: var(--spacing-sm);
    }
    
    .version-info {
        flex-direction: column;
        gap: var(--spacing-sm);
    }
    
    .carousel-controls {
        gap: var(--spacing-md);
    }
}

/* 大屏设备优化 */
@media (min-width: 1400px) {
    .container {
        max-width: 1400px;
    }
    
    .hero-title {
        font-size: 4rem;
    }
    
    .section-title {
        font-size: 3rem;
    }
}

/* 高对比度模式支持 */
@media (prefers-contrast: high) {
    :root {
        --shadow-light: 0 2px 10px rgba(0, 0, 0, 0.3);
        --shadow-medium: 0 4px 20px rgba(0, 0, 0, 0.4);
        --shadow-heavy: 0 8px 30px rgba(0, 0, 0, 0.5);
    }
}

/* 减少动画模式支持 */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
    
    html {
        scroll-behavior: auto;
    }
}