/* 全局样式 */
:root {
    /* 颜色变量 */
    --color-primary: #7359ff;
    --color-primary-dark: #5a4acc;
    --color-background: #1f1f2b;
    --color-card: #2a2b36;
    --color-sidebar: #16171d;
    --color-text: #ffffff;
    --color-text-secondary: #8f90a2;
    --color-badge-new: #7359ff;
    --color-badge-hot: #ff4757;
    --color-success: #4caf50;
    --color-error: #ff5252;
    
    /* 尺寸变量 */
    --border-radius-sm: 8px;
    --border-radius: 12px;
    --spacing-xs: 4px;
    --spacing-sm: 8px;
    --spacing: 16px;
    --spacing-md: 20px;
    --spacing-lg: 32px;
    --sidebar-width: 240px;
    
    /* 阴影变量 */
    --shadow-sm: 0 2px 4px rgba(0,0,0,0.1);
    --shadow: 0 4px 8px rgba(0,0,0,0.1);
    --shadow-lg: 0 8px 16px rgba(0,0,0,0.2);
    
    /* 过渡变量 */
    --transition-fast: 0.2s ease;
    --transition: 0.3s ease;
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background-color: var(--color-background);
    color: var(--color-text);
    line-height: 1.6;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    overflow-x: hidden;
    margin: 0;
    padding: 0;
}

a {
    text-decoration: none;
    color: inherit;
}

button {
    background: none;
    border: none;
    cursor: pointer;
    font-family: inherit;
}

ul {
    list-style: none;
}

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

/* 移动端菜单切换按钮 */
.menu-toggle {
    position: fixed;
    top: 20px;
    right: 20px;
    width: 40px;
    height: 40px;
    background-color: var(--color-primary);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1100;
    box-shadow: var(--shadow);
    display: none;
}

/* 侧边栏样式 */
.sidebar {
    position: fixed;
    left: 0;
    top: 0;
    width: var(--sidebar-width);
    height: 100vh;
    background: var(--color-sidebar);
    color: var(--color-text);
    padding: var(--spacing-md) 0;
    overflow-y: auto;
    z-index: 1000;
    transition: transform var(--transition);
}

/* Logo样式 */
.sidebar-logo {
    display: flex;
    align-items: center;
    padding: 0 var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

.sidebar-logo img {
    width: 32px;
    height: 32px;
    margin-right: 12px;
    border-radius: 8px;
}

.sidebar-logo span {
    font-size: 18px;
    font-weight: 600;
    color: var(--color-text);
}

/* 导航区块样式 */
.nav-section {
    margin-bottom: var(--spacing-lg);
    padding: 0 var(--spacing);
}

.nav-section h3 {
    font-size: 14px;
    color: var(--color-text-secondary);
    padding: 0 var(--spacing-sm);
    margin-bottom: 12px;
    font-weight: 500;
    text-transform: uppercase;
}

/* 导航项样式 */
.nav-item {
    display: flex;
    align-items: center;
    padding: 10px 12px;
    margin-bottom: 4px;
    color: var(--color-text);
    text-decoration: none;
    border-radius: var(--border-radius-sm);
    transition: all var(--transition-fast);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.nav-item:hover, 
.nav-item:focus {
    background: rgba(255, 255, 255, 0.1);
    outline: none;
}

.nav-item.active {
    background: var(--color-primary);
    color: white;
}

.nav-item i {
    width: 20px;
    margin-right: 12px;
    font-size: 16px;
    text-align: center;
    min-width: 20px;
}

.nav-item span {
    font-size: 14px;
    font-weight: 500;
    overflow: hidden;
    text-overflow: ellipsis;
}

/* 分隔线 */
.nav-section:not(:last-child) {
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    padding-bottom: var(--spacing);
}

/* 滚动条样式 */
.sidebar::-webkit-scrollbar {
    width: 6px;
}

.sidebar::-webkit-scrollbar-track {
    background: transparent;
}

.sidebar::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.2);
    border-radius: 3px;
}

.sidebar::-webkit-scrollbar-thumb:hover {
    background: rgba(255, 255, 255, 0.3);
}

/* 侧边栏描述文本 */
.sidebar-description {
    color: var(--color-text-secondary);
    font-size: 14px;
    line-height: 1.5;
    padding: 0 var(--spacing-sm);
    margin-bottom: var(--spacing);
}

/* 侧边栏特性 */
.sidebar-features {
    padding: 0 var(--spacing-sm);
}

.sidebar-features .feature {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    color: var(--color-text-secondary);
    margin-bottom: 12px;
}

.sidebar-features .feature i {
    color: var(--color-primary);
    font-size: 16px;
    width: 20px;
    text-align: center;
}

.sidebar-features .feature span {
    font-size: 14px;
}

/* 主内容区域调整 */
.main-content {
    margin-left: var(--sidebar-width);
    padding: var(--spacing-md);
    flex: 1 0 auto;
    background: var(--color-background);
    width: calc(100% - var(--sidebar-width));
    transition: margin var(--transition);
    display: flex;
    flex-direction: column;
}

/* 顶部搜索栏 */
.top-bar {
    display: flex;
    align-items: center;
    margin-bottom: var(--spacing-md);
    gap: var(--spacing-md);
}

.search-bar {
    flex: 1;
    max-width: 600px;
    position: relative;
}

.search-bar input {
    width: 100%;
    padding: 12px 20px;
    padding-left: 45px;
    border-radius: var(--border-radius-sm);
    border: none;
    background-color: var(--color-card);
    color: var(--color-text);
    font-size: 16px;
    transition: box-shadow var(--transition-fast);
}

.search-bar input:focus {
    outline: none;
    box-shadow: 0 0 0 2px var(--color-primary);
}

.search-bar i {
    position: absolute;
    left: 15px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--color-text-secondary);
}

/* 搜索建议 */
.search-suggestions {
    position: absolute;
    top: 100%;
    left: 0;
    width: 100%;
    background-color: var(--color-card);
    border-radius: 0 0 var(--border-radius-sm) var(--border-radius-sm);
    box-shadow: var(--shadow);
    z-index: 10;
    max-height: 300px;
    overflow-y: auto;
    display: none;
}

.search-suggestions.active {
    display: block;
}

.search-suggestion-item {
    padding: var(--spacing-sm) var(--spacing);
    cursor: pointer;
    transition: background var(--transition-fast);
}

.search-suggestion-item:hover {
    background-color: rgba(255, 255, 255, 0.1);
}

/* 特色游戏轮播 */
.featured-games {
    margin-bottom: 30px;
}

.featured-slider {
    border-radius: var(--border-radius);
    overflow: hidden;
    position: relative;
    height: 300px;
}

.featured-slide {
    position: relative;
    height: 100%;
}

.featured-slide img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

/* 游戏网格 */
.games-grid {
    flex: 1;
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: var(--spacing-md);
    padding: var(--spacing-md) 0;
}

/* 游戏卡片 */
.game-card {
    background-color: var(--color-card);
    border-radius: var(--border-radius);
    overflow: hidden;
    transition: transform var(--transition-fast), box-shadow var(--transition-fast);
    cursor: pointer;
    position: relative;
}

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

.game-cover {
    position: relative;
    overflow: hidden;
    padding-top: 56.25%; /* 16:9 宽高比 */
}

.game-cover picture,
.game-cover img {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

/* 游戏封面图片样式 */
.game-cover img {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition);
    border-radius: var(--border-radius-sm) var(--border-radius-sm) 0 0;
}

.game-card:hover .game-cover img {
    transform: scale(1.05);
}

.game-cover img[src$='.svg'] {
    object-fit: contain;
    padding: var(--spacing-sm);
}

.game-info {
    padding: var(--spacing-sm);
}

.game-info h3 {
    margin: 0 0 var(--spacing-sm);
    font-size: 1rem;
    color: var(--color-text);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.game-meta {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: 0.875rem;
    color: var(--color-text-secondary);
}

.game-rating {
    display: flex;
    align-items: center;
    gap: 4px;
}

.game-rating i {
    color: #ffd700;
}

.badge {
    position: absolute;
    top: var(--spacing-sm);
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--spacing-xs);
    font-size: 0.75rem;
    font-weight: 500;
    z-index: 1;
}

.badge.new {
    right: var(--spacing-sm);
    top: var(--spacing-sm);
    background: var(--color-badge-new);
    color: white;
}

.badge.popular {
    right: var(--spacing-sm);
    top: calc(var(--spacing-sm) + 26px); /* 在"新游戏"标签下方 */
    background: var(--color-badge-hot);
    color: white;
}

/* 分类标签 */
.categories-bar {
    display: flex;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
    overflow-x: auto;
    padding-bottom: var(--spacing-sm);
    scrollbar-width: thin;
}

.categories-bar::-webkit-scrollbar {
    height: 4px;
}

.categories-bar::-webkit-scrollbar-track {
    background: transparent;
}

.categories-bar::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.2);
    border-radius: 2px;
}

.category-tag {
    padding: var(--spacing-sm) var(--spacing);
    background-color: var(--color-card);
    border-radius: 20px;
    color: var(--color-text);
    text-decoration: none;
    white-space: nowrap;
    transition: background-color var(--transition-fast);
}

.category-tag:hover,
.category-tag.active {
    background-color: var(--color-primary);
}

.category-tag:focus {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
}

/* 游戏特性图标 */
.features-bar {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 30px;
    margin: var(--spacing-md) 0;
    padding: var(--spacing-md);
    background-color: var(--color-card);
    border-radius: var(--border-radius);
}

.feature-item {
    display: flex;
    align-items: center;
    gap: 10px;
    color: var(--color-text);
}

.feature-item i {
    font-size: 24px;
    color: var(--color-primary);
}

/* 加载更多按钮 */
.load-more-container {
    display: flex;
    justify-content: center;
    margin: var(--spacing-md) 0;
}

.load-more-btn {
    padding: var(--spacing-sm) var(--spacing-md);
    background-color: var(--color-primary);
    color: white;
    border-radius: var(--border-radius-sm);
    font-weight: 500;
    transition: background-color var(--transition-fast);
}

.load-more-btn:hover {
    background-color: var(--color-primary-dark);
}

.load-more-btn:focus {
    outline: none;
    box-shadow: 0 0 0 2px var(--color-background), 0 0 0 4px var(--color-primary);
}

/* 加载状态 */
.loading-placeholder {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 200px;
    grid-column: 1 / -1;
}

.spinner {
    width: 40px;
    height: 40px;
    border: 4px solid rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    border-top-color: var(--color-primary);
    animation: spin 1s ease-in-out infinite;
    margin-bottom: var(--spacing-sm);
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* 模态框 */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.7);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 2000;
    opacity: 0;
    visibility: hidden;
    transition: opacity var(--transition), visibility var(--transition);
}

.modal.active {
    opacity: 1;
    visibility: visible;
}

.modal-content {
    background-color: var(--color-card);
    border-radius: var(--border-radius);
    width: 90%;
    max-width: 800px;
    max-height: 90vh;
    overflow-y: auto;
    position: relative;
    transform: translateY(20px);
    transition: transform var(--transition);
}

.modal.active .modal-content {
    transform: translateY(0);
}

.close-modal {
    position: absolute;
    top: var(--spacing-sm);
    right: var(--spacing-sm);
    font-size: 24px;
    color: var(--color-text);
    background: none;
    border: none;
    cursor: pointer;
    z-index: 1;
}

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

/* 页脚 */
.main-footer {
    background-color: var(--color-sidebar);
    color: var(--color-text);
    padding: var(--spacing-md) 0;
    margin-left: var(--sidebar-width);
    width: calc(100% - var(--sidebar-width));
    transition: margin var(--transition), width var(--transition);
    margin-top: auto;
}

.footer-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-md);
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

.footer-section h3 {
    font-size: 16px;
    margin-bottom: var(--spacing);
    color: var(--color-text);
}

.footer-section p {
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing);
    font-size: 14px;
}

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

.footer-section ul li a {
    color: var(--color-text-secondary);
    transition: color var(--transition-fast);
    display: flex;
    align-items: center;
    font-size: 14px;
}

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

.footer-section ul li a i {
    margin-right: var(--spacing-sm);
    width: 20px;
    text-align: center;
}

.contact-link {
    color: var(--color-text-secondary);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    transition: color var(--transition-fast);
}

.contact-link:hover {
    color: var(--color-text);
}

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

.social-links a {
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-text);
    background: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    transition: background var(--transition-fast);
}

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

.footer-bottom {
    margin-top: var(--spacing-md);
    padding-top: var(--spacing);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    text-align: center;
    font-size: 14px;
    color: var(--color-text-secondary);
}

/* 响应式设计 */
@media (max-width: 1200px) {
    .games-grid {
        grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    }
}

@media (max-width: 992px) {
    :root {
        --sidebar-width: 200px;
    }
    
    .featured-slider {
        height: 250px;
    }
}

@media (max-width: 768px) {
    .menu-toggle {
        display: flex;
    }
    
    .sidebar {
        transform: translateX(-100%);
    }
    
    .sidebar.active {
        transform: translateX(0);
    }
    
    .main-content, 
    .main-footer {
        margin-left: 0;
        width: 100%;
    }
    
    body {
        display: flex;
        flex-direction: column;
    }
    
    .main-content {
        flex: 1 0 auto;
    }
    
    .main-footer {
        flex-shrink: 0;
    }
    
    .games-grid {
        grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
    }
    
    .features-bar {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--spacing);
    }
}

@media (max-width: 480px) {
    .games-grid {
        grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
        gap: var(--spacing);
    }
    
    .feature-item {
        font-size: 14px;
    }
    
    .feature-item i {
        font-size: 20px;
    }
    
    .categories-bar {
        overflow-x: auto;
        padding-bottom: var(--spacing-sm);
    }
    
    .category-tag {
        padding: 6px 12px;
        font-size: 13px;
    }
    
    .footer-container {
        grid-template-columns: 1fr;
    }
}

/* 焦点样式 */
:focus {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
}

/* 暗黑模式优化 */
@media (prefers-color-scheme: dark) {
    :root {
        --color-primary: #8f67ff;
    }
}

/* 游戏预览模态框样式 */
.preview-header {
    margin-bottom: var(--spacing-md);
}

.preview-header h2 {
    font-size: 1.8rem;
    margin-bottom: var(--spacing-sm);
}

.preview-header .meta {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-sm);
}

.top-play-button {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    margin-top: var(--spacing);
    margin-bottom: var(--spacing);
}

.play-button {
    padding: var(--spacing-sm) var(--spacing-md);
    background-color: var(--color-primary);
    color: white;
    border-radius: var(--border-radius-sm);
    font-weight: 500;
    text-align: center;
    transition: background-color var(--transition-fast);
    display: inline-block;
}

.play-button:hover {
    background-color: var(--color-primary-dark);
    text-decoration: none;
}

/* 图片加载占位符 */
.image-loading-placeholder {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: var(--color-card);
}

.image-loading-placeholder .spinner {
    width: 30px;
    height: 30px;
    border-width: 3px;
}

/* 游戏详情预览图片样式 */
.preview-image-container {
    width: 100%;
    position: relative;
    margin-bottom: var(--spacing-md);
    border-radius: var(--border-radius-sm);
    overflow: hidden;
    box-shadow: var(--shadow);
}

.preview-image-container img {
    width: 100%;
    display: block;
    aspect-ratio: 16 / 9;
    object-fit: cover;
}

.preview-image-container iframe {
    width: 100%;
    display: block;
    aspect-ratio: 16 / 9;
    border: none;
    height: 500px;
}

/* 游戏推荐卡片样式 */
.recommended-games {
    margin-top: var(--spacing-md);
}

.recommended-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
    gap: var(--spacing);
    margin-top: var(--spacing);
}

.recommended-card {
    display: flex;
    flex-direction: column;
    background-color: rgba(255, 255, 255, 0.05);
    border-radius: var(--border-radius-sm);
    overflow: hidden;
    cursor: pointer;
    transition: transform var(--transition-fast), background var(--transition-fast);
}

.recommended-card:hover {
    transform: translateY(-3px);
    background-color: rgba(255, 255, 255, 0.1);
}

.recommended-card img {
    width: 100%;
    height: 68px;
    object-fit: cover;
    border-radius: var(--border-radius-sm) var(--border-radius-sm) 0 0;
    display: block;
}

.rec-info {
    padding: var(--spacing-sm);
}

.rec-info h4 {
    font-size: 14px;
    margin-bottom: 4px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.rec-meta {
    font-size: 12px;
    color: var(--color-text-secondary);
}