/* 苹果深色模式 (Apple Dark Mode) 风格 */
:root {
    /* 主题颜色 - Apple Dark Mode 标准色值 */
    --primary-bg: #1c1c1e;        /* 系统深灰 - 主背景色 */
    --secondary-bg: #2c2c2e;      /* 次要背景色 - 卡片背景 */
    --tertiary-bg: #3a3a3c;       /* 第三层背景 - 交互元素 */
    --text-primary: #ffffff;      /* 主文字色 - 纯白 */
    --text-secondary: #ebebf5cc;  /* 次要文字 - 半透明白 */
    --text-tertiary: #ebebf599;   /* 第三层文字 - 更低对比度 */
    --accent-blue: #0a84ff;       /* 苹果蓝 - 链接和强调 */
    --accent-red: #ff375f;        /* 苹果红 - 按钮和重要元素 */
    --separator: #54545899;       /* 分隔线颜色 */
    --system-gray: #636366;       /* 系统浅灰 - 辅助色 */
    
    /* 布局参数 */
    --nav-height: 60px;
    --sidebar-width: 220px;
    --border-radius: 12px;        /* 苹果标准圆角 */
    
    /* 搜索相关变量 */
    --bg-color: var(--secondary-bg);
    --bg-color-dark: var(--primary-bg);
    --text-color: var(--text-primary);
    --border-color: var(--separator);
    --border-color-dark: var(--tertiary-bg);
    --hover-color: var(--tertiary-bg);
    --hover-color-dark: rgba(255, 255, 255, 0.1);
}

/* 全局重置和字体设置 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "SF Pro Display", "SF Pro Text", "Helvetica Neue", Arial, sans-serif;
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--primary-bg);
    -webkit-font-smoothing: antialiased; /* 苹果设备字体渲染优化 */
    -moz-osx-font-smoothing: grayscale;
}

/* 超链接样式 */
a {
    color: var(--accent-blue);
    text-decoration: none;
    transition: opacity 0.2s ease;
}

a:hover {
    opacity: 0.8;
}

/* 顶部导航栏 - 半透明毛玻璃效果 */
header {
    background-color: rgba(28, 28, 30, 0.85);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--nav-height);
    z-index: 100;
    box-shadow: 0 1px 0 rgba(255, 255, 255, 0.08);
}

.header-content {
    max-width: 1440px;
    margin: 0 auto;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 20px;
}

.logo {
    display: flex;
    align-items: center;
    min-width: 200px;
}

.logo a {
    display: flex;
    align-items: center;
    text-decoration: none;
    color: var(--text-primary);
}

.logo img {
    height: 40px;
    margin-right: 10px;
}

.logo h1 {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-primary);
}

.logo span {
    color: var(--accent-blue);
}

/* 搜索框相关样式 */
.search-bar {
    position: relative;
    display: flex;
    align-items: center;
    width: 100%;
    max-width: 600px;
    margin: 0 20px;
}

.search-bar input {
    width: 100%;
    padding: 10px 40px 10px 15px;
    border: 2px solid var(--border-color);
    border-radius: 30px;
    font-size: 16px;
    background: var(--bg-color);
    color: var(--text-color);
    transition: all 0.3s ease;
}

.search-bar input:focus {
    border-color: var(--accent-blue);
    outline: none;
    box-shadow: 0 0 0 3px rgba(0, 132, 255, 0.1);
}

.search-button {
    position: absolute;
    right: 10px;
    background: none;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    padding: 8px;
    border-radius: 50%;
    transition: all 0.3s ease;
}

.search-button:hover {
    color: var(--accent-blue);
    background: rgba(0, 132, 255, 0.1);
}

/* 搜索建议样式 */
.search-suggestions {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--bg-color);
    border-radius: 8px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    margin-top: 8px;
    z-index: 1000;
    max-height: 300px;
    overflow-y: auto;
    display: none;
    border: 1px solid var(--border-color);
}

.suggestion-item {
    padding: 10px;
    display: flex;
    align-items: center;
    gap: 12px;
    cursor: pointer;
    transition: all 0.2s ease;
}

.suggestion-item:hover {
    background: var(--hover-color);
}

.suggestion-thumb {
    width: 40px;
    height: 40px;
    object-fit: cover;
    border-radius: 6px;
}

.suggestion-info {
    flex: 1;
}

.suggestion-title {
    font-weight: 500;
    color: var(--text-color);
    margin-bottom: 2px;
}

.suggestion-type {
    color: var(--text-secondary);
    font-size: 0.85em;
}

/* 暗色主题适配 */
@media (prefers-color-scheme: dark) {
    .search-suggestions {
        background: var(--bg-color-dark);
        border-color: var(--border-color-dark);
    }
    
    .suggestion-item:hover {
        background: var(--hover-color-dark);
    }
}

/* 移动端适配 */
@media (max-width: 768px) {
    .header-content {
        padding: 0 10px;
    }
    
    .search-bar {
        margin: 0 10px;
        max-width: 200px;
    }
    
    .logo {
        min-width: auto;
    }
    
    .logo h1 {
        display: none;
    }
    
    .search-suggestions {
        position: fixed;
        left: 15px;
        right: 15px;
        max-height: 50vh;
    }
    
    .section-header {
        padding: 0.6rem 0.8rem;
        margin-bottom: 1rem;
        width: 90%; /* 在小屏幕上减小宽度以确保居中 */
        margin-left: auto;
        margin-right: auto;
    }
    
    .section-title {
        font-size: 1.3rem;
    }
    
    .section-title i {
        font-size: 1.1rem;
        margin-right: 8px;
    }
    
    .view-more {
        font-size: 0.85rem;
    }
}

@media (max-width: 480px) {
    .search-bar {
        max-width: 150px;
    }
    
    .logo img {
        height: 32px;
    }
    
    .user-actions {
        min-width: 80px;
    }
    
    .section-header {
        padding: 0.5rem;
        width: 95%;
    }
    
    .section-title {
        font-size: 1.1rem;
    }
    
    .section-title i {
        font-size: 1rem;
        margin-right: 6px;
    }
    
    .view-more {
        font-size: 0.8rem;
    }
}

/* 用户操作按钮 */
.user-actions {
    display: flex;
    align-items: center;
    min-width: 100px;
    justify-content: flex-end;
}

.btn-login {
    background: linear-gradient(135deg, var(--accent-red), #ff2d55); /* 苹果风格渐变 */
    color: white;
    border: none;
    padding: 8px 16px; /* 苹果标准按钮内边距 */
    border-radius: 20px;
    cursor: pointer;
    font-weight: 600;
    font-size: 0.95rem;
    margin-left: 1rem;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.btn-login:hover {
    transform: translateY(-1px);
    box-shadow: 0 2px 8px rgba(255, 55, 95, 0.4);
}

.btn-login:active {
    transform: translateY(1px);
    box-shadow: 0 1px 3px rgba(255, 55, 95, 0.3);
}

/* 导航切换按钮 */
.nav-toggle {
    position: fixed;
    top: 1rem;
    left: 1rem;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background-color: var(--tertiary-bg);
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    z-index: 9999; /* 确保在最顶层 */
    cursor: pointer;
    transition: all 0.3s ease;
    border: 1px solid rgba(255, 255, 255, 0.2); /* 增加边框对比度 */
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.3); /* 添加阴影增强可见性 */
    padding: 0; /* 移除内边距 */
    outline: none; /* 移除点击时的轮廓 */
    -webkit-tap-highlight-color: transparent; /* 移除移动设备点击高亮 */
}

.nav-toggle:hover {
    transform: scale(1.05);
    background-color: var(--accent-blue); /* 悬停时变为蓝色 */
    border-color: rgba(255, 255, 255, 0.5); /* 增加边框可见性 */
}

.nav-toggle:active {
    transform: scale(0.95);
    background-color: var(--accent-red); /* 点击时变为红色 */
}

/* 增加按钮内部线条间距以便于点击 */
.nav-toggle span {
    display: block;
    width: 20px; /* 增加宽度 */
    height: 2px;
    background-color: var(--text-primary);
    margin: 3px 0; /* 增加间距 */
    transition: all 0.3s ease;
}

/* 按钮激活状态样式 */
.nav-toggle.active span:nth-child(1) {
    transform: translateY(5px) rotate(45deg);
    background-color: var(--text-primary);
}

.nav-toggle.active span:nth-child(2) {
    opacity: 0;
}

.nav-toggle.active span:nth-child(3) {
    transform: translateY(-5px) rotate(-45deg);
    background-color: var(--text-primary);
}

/* 侧边栏 - 苹果风格导航 */
.sidebar {
    background-color: var(--secondary-bg);
    width: var(--sidebar-width);
    height: 100vh;
    position: fixed;
    top: 0;
    left: 0;
    padding-top: calc(var(--nav-height) + 0.5rem);
    overflow-y: auto;
    z-index: 90;
    box-shadow: 1px 0 0 rgba(255, 255, 255, 0.08);
    transition: all 0.3s ease;
    
    /* 自定义滚动条样式 */
    scrollbar-width: thin;
    scrollbar-color: rgba(114, 114, 120, 0.5) rgba(58, 58, 60, 0.1);
}

/* 针对Webkit浏览器（Chrome, Safari）的滚动条样式 */
.sidebar::-webkit-scrollbar {
    width: 6px;
}

.sidebar::-webkit-scrollbar-track {
    background: rgba(58, 58, 60, 0.1);
    border-radius: 3px;
}

.sidebar::-webkit-scrollbar-thumb {
    background-color: rgba(114, 114, 120, 0.5);
    border-radius: 3px;
    border: none;
}

.sidebar::-webkit-scrollbar-thumb:hover {
    background-color: rgba(114, 114, 120, 0.8);
}

.sidebar-categories {
    list-style: none;
}

.sidebar-categories li {
    padding: 10px 20px;
    cursor: pointer;
    transition: background-color 0.2s, padding 0.3s ease;
    display: flex;
    align-items: center;
    border-radius: 8px;
    margin: 2px 10px;
}

.sidebar-categories li:hover {
    background-color: var(--tertiary-bg);
}

.sidebar-categories li.active {
    background-color: rgba(10, 132, 255, 0.2); /* 透明蓝色背景 */
    color: var(--accent-blue);
}

.category-icon {
    margin-right: 12px;
    width: 20px;
    display: inline-block;
    text-align: center;
    transition: margin 0.3s ease, font-size 0.3s ease;
    font-size: 0.95rem;
}

.sidebar-categories li span {
    transition: opacity 0.3s ease;
    font-weight: 500;
    letter-spacing: 0.3px;
}

/* 侧边栏折叠状态 */
.sidebar-collapsed {
    width: 60px;
    overflow-x: hidden;
}

.sidebar-collapsed .sidebar-categories li {
    padding: 0.8rem 0;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 50px;
}

.sidebar-collapsed .category-icon {
    margin-right: 0;
    font-size: 1.2rem;
    display: block;
}

.sidebar-collapsed li span {
    display: none;
}

/* 主内容区域 */
main {
    margin-top: var(--nav-height);
    padding: 1.5rem 0;
    min-height: calc(100vh - var(--nav-height));
    display: flex;
    flex-direction: column;
    align-items: center;
    width: 100%;
    position: relative;
    transition: all 0.3s ease;
    box-sizing: border-box;
    max-width: 100%;
}

/* 当侧边栏折叠时，内容区域保持居中 */
.content-expanded {
    /* 不使用margin-left，而是调整main的宽度来保持居中 */
    width: calc(100% - 60px);
    margin-left: 60px;
}

/* 欢迎横幅 */
.welcome-banner {
    background-color: rgba(44, 44, 46, 0.8);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-radius: var(--border-radius);
    padding: 1.2rem;
    margin-bottom: 2rem;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.3); /* 苹果风格阴影 */
    flex-wrap: nowrap;
    animation: fadeIn 0.8s ease-out;
}

.welcome-banner > div {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 100%;
}

.welcome-banner h2 {
    font-size: 1.3rem;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0;
    white-space: nowrap;
}

.welcome-banner .site-logo {
    height: 50px;
    margin-right: 1rem;
}

.features {
    display: flex;
    gap: 0.8rem;
    margin: 0;
    flex-wrap: nowrap;
}

.feature {
    display: flex;
    align-items: center;
    background-color: rgba(58, 58, 60, 0.6);
    padding: 0.4rem 0.8rem;
    border-radius: 20px;
    font-size: 0.85rem;
    white-space: nowrap;
}

.feature-icon {
    margin-right: 0.4rem;
    color: var(--accent-blue);
    transition: transform 0.3s ease;
}

.feature:hover .feature-icon {
    transform: scale(1.2);
}

/* 游戏部分 */
.games-section {
    display: flex;
    flex-direction: column;
    align-items: center;
    width: 100%;
    margin-bottom: 2rem;
    padding: 0 1rem; /* 添加水平内边距 */
    position: relative; /* 添加相对定位 */
    box-sizing: border-box; /* 确保padding不会增加宽度 */
    max-width: 1200px; /* 限制最大宽度 */
    margin-left: auto; /* 左侧自动外边距 */
    margin-right: auto; /* 右侧自动外边距 */
}

/* 分类标题框 */
.section-header {
    background-color: var(--tertiary-bg);
    border-radius: var(--border-radius);
    padding: 10px 20px;
    margin: 0 auto 1.2rem auto;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
    border-left: 4px solid var(--accent-blue);
    display: flex;
    justify-content: center;
    max-width: 80%;
    transition: all 0.3s ease;
}

.title-container {
    display: flex;
    align-items: center;
    justify-content: center; /* 居中对齐 */
    width: 100%; /* 确保容器占满宽度 */
    max-width: 1100px; /* 限制最大宽度 */
}

.section-title {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-primary);
    letter-spacing: 0.5px;
    margin: 0 auto; /* 标题居中 */
    text-align: center; /* 文本居中对齐 */
    flex-grow: 1; /* 让标题占据可用空间 */
    transition: transform 0.3s ease, color 0.3s ease;
}

/* 分类标题图标样式 */
.section-title i {
    margin-right: 10px;
    color: var(--accent-blue);
    font-size: 1.3rem; /* 稍微增大图标 */
    transition: transform 0.3s ease;
}

/* 鼠标悬停时图标效果 */
.section-header:hover .section-title i {
    transform: scale(1.2);
    color: #36a0ff; /* 悬停时变亮 */
}

/* 鼠标悬停时标题效果 */
.section-header:hover .section-title {
    color: #ffffff; /* 悬停时文字变亮 */
}

.view-more {
    color: var(--accent-blue);
    text-decoration: none;
    font-weight: 500;
    transition: all 0.3s ease;
    margin-left: 15px;
    font-size: 0.9rem;
    white-space: nowrap;
    display: inline-flex;
    align-items: center;
}

.view-more:hover {
    color: var(--accent-red);
    transform: translateX(2px);
}

/* 游戏网格布局 */
.games-grid {
    display: grid;
    grid-template-columns: repeat(5, 1fr); /* 每行5个游戏卡片 */
    gap: 15px;
    padding: 10px;
    margin: 0 auto;
    justify-content: center;
    max-width: 1200px;
    animation: fadeIn 0.5s ease-in-out;
    box-sizing: border-box;
}

/* 游戏卡片样式 */
.game-card {
    background-color: var(--secondary-bg);
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s, box-shadow 0.3s;
    position: relative;
    aspect-ratio: 0.8; /* 保持卡片比例一致 */
    width: 100%;
    max-width: 100%;
    animation: fadeIn 0.5s ease-in-out;
}

.empty-card {
    background-color: rgba(100, 100, 100, 0.1);
    border: 2px dashed var(--accent-blue);
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 200px;
    text-align: center;
    cursor: default;
}

.empty-card .game-card-content {
    padding: 1rem;
    color: var(--text-secondary);
}

.empty-card .game-card-content h3 {
    font-size: 1.1rem;
    margin-bottom: 0.5rem;
}

.empty-card:hover {
    background-color: rgba(100, 100, 100, 0.2);
    border-color: var(--accent-red);
}

.game-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.3);
}

.game-card:active {
    transform: translateY(-4px) scale(0.99);
}

.game-card img {
    width: 100%;
    height: auto;
    aspect-ratio: 4/3;
    object-fit: cover;
    transition: transform 0.3s ease;
}

.game-card-content {
    padding: 12px;
    display: flex;
    flex-direction: column;
}

.game-card h3 {
    font-size: 1rem;
    margin-bottom: 5px;
    color: var(--text-primary);
    overflow: hidden;
    text-overflow: ellipsis;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
}

.game-card p {
    font-size: 0.9rem;
    color: var(--text-secondary);
}

/* 游戏标签 */
.game-tag {
    position: absolute;
    top: 0.7rem;
    right: 0.7rem;
    padding: 0.3rem 0.6rem;
    border-radius: 15px;
    font-size: 0.7rem;
    font-weight: 600;
    letter-spacing: 0.5px;
    text-transform: uppercase;
    backdrop-filter: blur(4px);
    -webkit-backdrop-filter: blur(4px);
}

.tag-new {
    background-color: rgba(255, 55, 95, 0.85);
    color: white;
}

.tag-hot {
    background-color: rgba(255, 149, 0, 0.85); /* 苹果橙色 */
    color: white;
}

/* 游戏容器 */
.game-container {
    max-width: 900px;
    margin: 0 auto;
    padding: 1rem;
}

.game-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
}

.game-header h1 {
    font-size: 2rem;
    color: var(--text-primary);
    font-weight: 600;
    letter-spacing: 0.5px;
}

.game-actions {
    display: flex;
    gap: 1rem;
}

/* 游戏按钮 */
.btn-fullscreen, .btn-favorite, .btn-start {
    background: linear-gradient(135deg, var(--accent-blue), #409cff);
    color: white;
    border: none;
    padding: 8px 16px;
    border-radius: 20px;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-weight: 600;
    font-size: 0.95rem;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.btn-start {
    background: linear-gradient(135deg, var(--accent-red), #ff2d55);
}

.btn-fullscreen:hover, .btn-favorite:hover, .btn-start:hover {
    transform: translateY(-1px);
    box-shadow: 0 2px 8px rgba(10, 132, 255, 0.4);
}

.btn-start:hover {
    box-shadow: 0 2px 8px rgba(255, 55, 95, 0.4);
}

.btn-fullscreen:active, .btn-favorite:active, .btn-start:active {
    transform: translateY(1px);
}

/* 游戏信息区域 */
.game-info {
    background-color: var(--secondary-bg);
    border-radius: var(--border-radius);
    padding: 1.2rem;
    margin-bottom: 1.5rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.15);
}

.game-info p {
    font-size: 1.1rem;
    max-width: 60%;
    color: var(--text-secondary);
    line-height: 1.5;
}

.game-stats {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.score {
    font-size: 1.2rem;
    font-weight: 600;
    background-color: rgba(58, 58, 60, 0.6);
    padding: 0.5rem 1rem;
    border-radius: 20px;
    color: var(--text-primary);
}

/* 记忆游戏板 */
.memory-game {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1rem;
    perspective: 1000px;
    margin-bottom: 2rem;
    background-color: var(--secondary-bg);
    padding: 1.5rem;
    border-radius: var(--border-radius);
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.2);
}

.memory-card {
    height: 150px;
    position: relative;
    transform-style: preserve-3d;
    transition: transform 0.6s cubic-bezier(0.16, 1, 0.3, 1); /* 苹果动画曲线 */
    cursor: pointer;
}

.memory-card.flip {
    transform: rotateY(180deg);
}

.memory-card:active {
    transform: scale(0.97);
    transition: transform 0.2s;
}

.memory-card .front-face,
.memory-card .back-face {
    width: 100%;
    height: 100%;
    padding: 0.5rem;
    position: absolute;
    border-radius: 8px;
    background: var(--tertiary-bg);
    backface-visibility: hidden;
    border: 2px solid var(--accent-blue);
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 2rem;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
}

.memory-card .front-face {
    transform: rotateY(180deg);
    background-color: var(--secondary-bg);
    color: var(--text-primary);
}

.memory-card .back-face {
    color: var(--accent-blue);
    background: linear-gradient(145deg, var(--secondary-bg), var(--tertiary-bg));
}

/* 游戏说明 */
.game-description {
    background-color: var(--secondary-bg);
    border-radius: var(--border-radius);
    padding: 1.5rem;
    margin-bottom: 2rem;
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.2);
}

.game-description h2 {
    margin-bottom: 1rem;
    font-size: 1.5rem;
    color: var(--text-primary);
    font-weight: 600;
}

.game-description p {
    margin-bottom: 1.5rem;
    line-height: 1.8;
    color: var(--text-secondary);
}

.game-description ul {
    padding-left: 1.5rem;
    margin-bottom: 1rem;
    color: var(--text-secondary);
}

.game-description li {
    margin-bottom: 0.8rem;
    position: relative;
}

.game-description li::before {
    content: '•';
    color: var(--accent-blue);
    font-weight: bold;
    position: absolute;
    left: -1rem;
}

/* 相关游戏 */
.related-games h2 {
    margin-bottom: 1.2rem;
    font-size: 1.5rem;
    color: var(--text-primary);
    font-weight: 600;
}

.related-games .games-grid {
    grid-template-columns: repeat(3, 1fr);
}

/* 页脚 */
footer {
    background-color: rgba(44, 44, 46, 0.8);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    color: var(--text-secondary);
    text-align: center;
    padding: 1.5rem;
    margin-top: 3rem;
    font-size: 0.95rem;
    border-top: 1px solid var(--separator);
}

/* 响应式布局调整 */
@media (max-width: 1100px) {
    .games-grid {
        grid-template-columns: repeat(4, 1fr); /* 每行4个游戏 */
        gap: 12px;
        max-width: 900px;
    }
    .game-card {
        aspect-ratio: 0.75;
    }
}

@media (max-width: 900px) {
    .games-grid {
        grid-template-columns: repeat(3, 1fr); /* 每行3个游戏 */
        gap: 10px;
        max-width: 700px;
    }
}

@media (max-width: 768px) {
    .games-grid {
        grid-template-columns: repeat(3, 1fr);
        gap: 8px;
        padding: 5px;
        max-width: 600px;
    }
}

@media (max-width: 580px) {
    .games-grid {
        grid-template-columns: repeat(2, 1fr); /* 每行2个游戏 */
        gap: 8px;
        max-width: 400px;
    }
}

@media (max-width: 400px) {
    .games-grid {
        grid-template-columns: repeat(1, 1fr); /* 每行1个游戏 */
        gap: 10px;
        max-width: 280px;
    }
}

/* 触摸设备优化 */
@media (hover: none) {
    .game-card:hover {
        transform: none;
        box-shadow: 0 4px 16px rgba(0, 0, 0, 0.2);
    }
    
    .game-card:active {
        transform: scale(0.98);
        box-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
    }
    
    .btn-login:hover {
        transform: none;
        box-shadow: none;
    }
    
    .btn-login:active {
        transform: scale(0.95);
        box-shadow: 0 1px 3px rgba(255, 55, 95, 0.3);
    }
    
    .feature {
        -webkit-tap-highlight-color: transparent;
    }
    
    .feature:active {
        background-color: rgba(58, 58, 60, 0.8);
    }
}

/* 动画效果 */
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

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

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* 图片和元素淡入效果统一样式 */
.lazy-image,
img[data-src] {
    opacity: 0;
    transition: opacity 0.3s ease-in;
}

.lazy-image.loaded,
img[data-src].loaded {
    opacity: 1;
    animation: fadeIn 0.3s ease-in-out;
}

/* 整合游戏卡片悬停效果 */
.game-card:hover,
.game-card.card-hover {
    transform: translateY(-8px);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.2);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

/* 触摸友好区域 */
.nav-toggle, .btn-login, .feature, .game-card, .sidebar-categories li {
    -webkit-tap-highlight-color: transparent;
}

/* 加载更多按钮样式 */
.load-more-btn {
    display: block;
    width: 200px;
    margin: 20px auto;
    padding: 12px 0;
    background-color: var(--accent-color);
    color: white;
    border: none;
    border-radius: 25px;
    cursor: pointer;
    font-size: 14px;
    font-weight: bold;
    text-align: center;
    transition: background-color 0.3s, transform 0.2s;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

.load-more-btn:hover {
    background-color: var(--accent-hover);
    transform: translateY(-2px);
    box-shadow: 0 6px 8px rgba(0, 0, 0, 0.15);
}

.load-more-btn:active {
    transform: translateY(0);
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

/* 性能监控面板样式 */
#performance-monitor {
    position: fixed;
    bottom: 20px;
    right: 20px;
    background: rgba(0, 0, 0, 0.8);
    color: #fff;
    padding: 15px;
    border-radius: 10px;
    font-family: monospace;
    z-index: 10000;
    max-width: 300px;
    box-shadow: 0 0 10px rgba(0,0,0,0.5);
}

/* 虚拟滚动容器样式 */
.virtual-scroll-container {
    position: relative;
    overflow: auto;
    width: 100%;
    height: 500px; /* 可调整高度 */
    will-change: transform;
}

/* 图片延迟加载淡入效果 */
img[data-src] {
    opacity: 0;
    transition: opacity 0.3s ease-in;
}

img[data-src].loaded {
    opacity: 1;
}

/* 优化媒体查询以提高移动设备性能 */
@media (max-width: 480px) {
    .game-card {
        /* 简化移动设备上的阴影效果 */
        box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    }
    
    .game-card img {
        /* 降低移动设备上的图片质量以提高性能 */
        image-rendering: optimizeSpeed;
    }
}

/* 使用CSS硬件加速提高性能 */
.games-grid {
    transform: translateZ(0);
    backface-visibility: hidden;
    perspective: 1000px;
}

/* 滚动加载指示器 */
.loading-indicator {
    text-align: center;
    padding: 20px;
    color: #666;
    font-size: 14px;
}

.loading-indicator::after {
    content: "";
    display: inline-block;
    width: 16px;
    height: 16px;
    margin-left: 8px;
    border: 2px solid var(--accent-blue);
    border-top-color: transparent;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

/* 添加延迟加载图片样式 */
.lazy-image {
    opacity: 0.6;
    transition: opacity 0.3s ease-in-out;
    background-color: #f0f0f0;
}

.lazy-image.loaded {
    opacity: 1;
}

/* 图片加载效果 */
@keyframes fadeIn {
    from { opacity: 0.6; }
    to { opacity: 1; }
}

img.loaded {
    animation: fadeIn 0.3s ease-in-out;
}

/* 现有的load-more-btn样式 */
.load-more-btn {
    display: block;
    width: 80%;
    margin: 20px auto;
    padding: 10px 15px;
    background-color: #4285f4;
    color: white;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    font-size: 16px;
    font-weight: 500;
    text-align: center;
    transition: background-color 0.3s, box-shadow 0.3s;
}

.load-more-btn:hover {
    background-color: #3367d6;
    box-shadow: 0 2px 5px rgba(0,0,0,0.2);
}

.load-more-btn:active {
    background-color: #2a56c6;
    box-shadow: 0 1px 3px rgba(0,0,0,0.2);
}

/* 游戏卡片悬停效果 */
.game-card.card-hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 20px rgba(0,0,0,0.1);
    border-color: #4285f4;
}