/* ==========================================
   CSS 变量 - 主题配色
   ========================================== */
:root {
    /* 亮色主题 */
    --primary-color: #6366f1;
    --primary-hover: #4f46e5;
    --secondary-color: #8b5cf6;
    --background: #f8fafc;
    --surface: #ffffff;
    --text-primary: #1e293b;
    --text-secondary: #64748b;
    --border-color: #e2e8f0;
    --shadow: rgba(0, 0, 0, 0.1);
    --shadow-lg: rgba(0, 0, 0, 0.15);

    /* 功能色 */
    --success: #10b981;
    --warning: #f59e0b;
    --danger: #ef4444;
    --info: #3b82f6;

    /* 间距 */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;

    /* 圆角 */
    --radius-sm: 0.5rem;
    --radius-md: 0.75rem;
    --radius-lg: 1rem;

    /* 过渡 */
    --transition: all 0.3s ease;
}

/* 暗色主题 */
body.dark-mode {
    --background: #0f172a;
    --surface: #1e293b;
    --text-primary: #f1f5f9;
    --text-secondary: #94a3b8;
    --border-color: #334155;
    --shadow: rgba(0, 0, 0, 0.3);
    --shadow-lg: rgba(0, 0, 0, 0.5);
}

/* ==========================================
   全局样式重置
   ========================================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC',
                 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
    background: var(--background);
    color: var(--text-primary);
    line-height: 1.6;
    transition: var(--transition);
}

.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 var(--spacing-sm);
}

/* ==========================================
   头部导航
   ========================================== */
.header {
    background: var(--surface);
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: 0 2px 4px var(--shadow);
}

.header .container {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-md);
    max-width: 600px;
}

.header-top {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--spacing-md);
}

.header-bottom {
    display: flex;
    justify-content: center;
}

.logo {
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--primary-color);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

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

.search-box {
    position: relative;
    display: flex;
    align-items: center;
    background: var(--background);
    border-radius: var(--radius-md);
    padding: 0.6rem 1rem;
    border: 1px solid var(--border-color);
    transition: var(--transition);
    width: 100%;
    max-width: 500px;
}

.search-box:focus-within {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

.search-box i {
    color: var(--text-secondary);
    margin-right: 0.5rem;
    flex-shrink: 0;
}

.search-box input {
    flex: 1;
    border: none;
    background: transparent;
    outline: none;
    color: var(--text-primary);
    font-size: 0.95rem;
}

.search-box input::placeholder {
    color: var(--text-secondary);
    opacity: 0.7;
}

.search-box input {
    border: none;
    background: transparent;
    outline: none;
    width: 100%;
    font-size: 0.95rem;
    color: var(--text-primary);
}

.icon-btn {
    background: transparent;
    border: none;
    color: var(--text-secondary);
    font-size: 1.2rem;
    padding: 0.5rem;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: var(--transition);
    position: relative;
}

.icon-btn:hover {
    background: var(--background);
    color: var(--primary-color);
}

.icon-btn .badge {
    position: absolute;
    top: 0;
    right: 0;
    background: var(--danger);
    color: white;
    font-size: 0.7rem;
    padding: 0.1rem 0.4rem;
    border-radius: 10px;
    min-width: 18px;
    text-align: center;
}

/* ==========================================
   主体内容
   ========================================== */
.main {
    padding: var(--spacing-lg) 0;
    min-height: calc(100vh - 150px);
}

/* ==========================================
   分类标签
   ========================================== */
.category-tabs {
    display: flex;
    gap: 0.5rem;
    margin-bottom: var(--spacing-lg);
    overflow-x: auto;
    padding-bottom: 0.5rem;
}

.tab-btn {
    background: var(--surface);
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    padding: 0.6rem 1.2rem;
    border-radius: var(--radius-md);
    cursor: pointer;
    white-space: nowrap;
    transition: var(--transition);
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.9rem;
}

.tab-btn:hover {
    background: var(--background);
    border-color: var(--primary-color);
    color: var(--primary-color);
}

.tab-btn.active {
    background: var(--primary-color);
    border-color: var(--primary-color);
    color: white;
}

/* ==========================================
   分类选择器
   ========================================== */
.header-bottom {
    display: flex;
    gap: var(--spacing-sm);
    align-items: center;
    justify-content: center;
}

.category-selector {
    position: relative;
}

.category-btn {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    background: var(--background);
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    padding: 0.6rem 1rem;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: var(--transition);
    white-space: nowrap;
    font-size: 0.9rem;
}

.category-btn:hover {
    border-color: var(--primary-color);
    color: var(--primary-color);
}

.category-selector.active .category-btn {
    border-color: var(--primary-color);
    color: var(--primary-color);
}

.category-selector.active .category-btn i:last-child {
    transform: rotate(180deg);
}

.category-dropdown {
    position: absolute;
    top: calc(100% + 0.5rem);
    right: 0;
    background: var(--surface);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    box-shadow: 0 4px 12px var(--shadow-lg);
    min-width: 200px;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: var(--transition);
    z-index: 1000;
}

.category-selector.active .category-dropdown {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.category-list {
    display: flex;
    flex-direction: column;
    padding: 0.5rem;
}

.category-option {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem 1rem;
    background: transparent;
    border: none;
    color: var(--text-primary);
    cursor: pointer;
    transition: var(--transition);
    border-radius: var(--radius-sm);
    text-align: left;
    font-size: 0.9rem;
}

.category-option:hover {
    background: var(--background);
    color: var(--primary-color);
}

.category-option.active {
    background: var(--primary-color);
    color: white;
}

.category-option i {
    width: 20px;
    text-align: center;
}

.category-btn i:last-child {
    transition: transform 0.3s ease;
    font-size: 0.75rem;
}

/* ==========================================
   推荐游戏区
   ========================================== */
.featured-section {
    margin-bottom: var(--spacing-xl);
}

.section-title {
    font-size: 1.3rem;
    font-weight: 600;
    margin-bottom: var(--spacing-md);
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--text-primary);
}

.featured-games {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-md);
    max-width: 500px;
    margin: 0 auto;
}

.featured-game {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    color: white;
    position: relative;
    overflow: hidden;
    cursor: pointer;
    transition: var(--transition);
}

.featured-game:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 20px var(--shadow-lg);
}

.featured-game::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -50%;
    width: 200%;
    height: 200%;
    background: rgba(255, 255, 255, 0.1);
    transform: rotate(45deg);
}

.featured-game-content {
    position: relative;
    z-index: 1;
}

.featured-game-title {
    font-size: 1.4rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
}

.featured-game-description {
    font-size: 0.95rem;
    opacity: 0.9;
    margin-bottom: var(--spacing-md);
}

.featured-game-stats {
    display: flex;
    gap: var(--spacing-md);
    font-size: 0.85rem;
}

/* ==========================================
   游戏网格
   ========================================== */
.games-section {
    margin-bottom: var(--spacing-xl);
}

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

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

.sort-controls {
    display: flex;
    gap: 0.5rem;
}

.sort-select {
    padding: 0.5rem 1rem;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    background: var(--surface);
    color: var(--text-primary);
    cursor: pointer;
    font-size: 0.9rem;
}

.games-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-md);
    max-width: 500px;
    margin: 0 auto;
}

/* ==========================================
   游戏卡片
   ========================================== */
.game-card {
    background: var(--surface);
    border-radius: var(--radius-lg);
    overflow: hidden;
    border: 1px solid var(--border-color);
    cursor: pointer;
    transition: var(--transition);
    position: relative;
}

.game-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 16px var(--shadow-lg);
    border-color: var(--primary-color);
}

.game-card-thumbnail {
    width: 100%;
    height: 220px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
}

.game-card-thumbnail img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.game-card-thumbnail::before {
    content: '\f04b';
    font-family: 'Font Awesome 6 Free';
    font-weight: 900;
    font-size: 3rem;
    color: white;
    opacity: 0.8;
    z-index: 1;
}

.game-card-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: var(--transition);
    z-index: 2;
}

.game-card:hover .game-card-overlay {
    opacity: 1;
}

.play-button {
    background: white;
    color: var(--primary-color);
    border: none;
    padding: 1rem 2rem;
    border-radius: 50px;
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    transition: var(--transition);
}

.play-button:hover {
    transform: scale(1.1);
}

.game-card-content {
    padding: var(--spacing-md);
}

.game-card-title {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
}

.game-card-description {
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-sm);
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.game-card-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.8rem;
    color: var(--text-secondary);
}

.game-card-category {
    background: var(--background);
    padding: 0.25rem 0.75rem;
    border-radius: 20px;
    display: flex;
    align-items: center;
    gap: 0.3rem;
}

.favorite-btn {
    background: none;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    font-size: 1.2rem;
    transition: var(--transition);
    padding: 0.3rem;
}

.favorite-btn:hover,
.favorite-btn.active {
    color: var(--danger);
    transform: scale(1.2);
}

/* ==========================================
   侧边栏
   ========================================== */
.sidebar {
    position: fixed;
    top: 0;
    right: -400px;
    width: 380px;
    height: 100%;
    background: var(--surface);
    box-shadow: -4px 0 12px var(--shadow-lg);
    transition: right 0.3s ease;
    z-index: 200;
    display: flex;
    flex-direction: column;
}

.sidebar.active {
    right: 0;
}

.sidebar-header {
    padding: var(--spacing-md);
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.sidebar-header h3 {
    font-size: 1.2rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.close-btn {
    background: none;
    border: none;
    font-size: 1.5rem;
    color: var(--text-secondary);
    cursor: pointer;
    padding: 0.5rem;
}

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

.sidebar-content {
    flex: 1;
    overflow-y: auto;
    padding: var(--spacing-md);
}

.empty-message {
    text-align: center;
    color: var(--text-secondary);
    padding: var(--spacing-xl) 0;
}

.sidebar-game-item {
    display: flex;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm);
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: var(--transition);
    margin-bottom: var(--spacing-sm);
}

.sidebar-game-item:hover {
    background: var(--background);
}

.sidebar-game-thumbnail {
    width: 80px;
    height: 60px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 2rem;
    flex-shrink: 0;
}

.sidebar-game-info {
    flex: 1;
    min-width: 0;
}

.sidebar-game-title {
    font-weight: 600;
    margin-bottom: 0.3rem;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.sidebar-game-time {
    font-size: 0.8rem;
    color: var(--text-secondary);
}

/* ==========================================
   模态框
   ========================================== */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.8);
    z-index: 1000;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-md);
}

.modal.active {
    display: flex;
}

.modal-content {
    background: var(--surface);
    border-radius: var(--radius-lg);
    width: 100%;
    max-width: 1200px;
    max-height: 90vh;
    overflow: hidden;
    display: flex;
    flex-direction: column;
}

.modal-content.small {
    max-width: 500px;
}

.modal-header {
    padding: var(--spacing-md);
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.modal-header h3 {
    font-size: 1.3rem;
}

.modal-controls {
    display: flex;
    gap: 0.5rem;
}

.modal-body {
    flex: 1;
    overflow-y: auto;
    padding: var(--spacing-md);
}

.game-info-bar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-md);
    flex-wrap: wrap;
    gap: var(--spacing-sm);
}

.game-meta {
    display: flex;
    gap: var(--spacing-md);
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.game-meta span {
    display: flex;
    align-items: center;
    gap: 0.3rem;
}

.game-actions {
    display: flex;
    gap: 0.5rem;
}

.action-btn {
    background: var(--background);
    border: 1px solid var(--border-color);
    padding: 0.5rem 1rem;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.9rem;
}

.action-btn:hover {
    background: var(--primary-color);
    border-color: var(--primary-color);
    color: white;
}

.action-btn.active {
    background: var(--danger);
    border-color: var(--danger);
    color: white;
}

.game-frame-container {
    position: relative;
    width: 100%;
    height: 600px;
    background: black;
    border-radius: var(--radius-md);
    overflow: hidden;
}

.game-frame-container.fullscreen {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    border-radius: 0;
    z-index: 1001;
}

#gameFrame {
    width: 100%;
    height: 100%;
    border: none;
}

.game-loading {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--surface);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-md);
}

.loading-spinner {
    width: 50px;
    height: 50px;
    border: 4px solid var(--border-color);
    border-top-color: var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

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

/* ==========================================
   分享模态框
   ========================================== */
.share-options {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-md);
}

.share-btn {
    background: var(--background);
    border: 1px solid var(--border-color);
    padding: 1rem;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
    font-size: 1.2rem;
}

.share-btn:hover {
    background: var(--primary-color);
    border-color: var(--primary-color);
    color: white;
    transform: translateY(-3px);
}

.share-link {
    display: flex;
    gap: 0.5rem;
}

.share-link input {
    flex: 1;
    padding: 0.6rem 1rem;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    background: var(--background);
    color: var(--text-primary);
}

.copy-btn {
    background: var(--primary-color);
    color: white;
    border: none;
    padding: 0.6rem 1.5rem;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: var(--transition);
}

.copy-btn:hover {
    background: var(--primary-hover);
}

/* ==========================================
   语言切换器
   ========================================== */
.language-selector {
    position: relative;
    margin-right: var(--spacing-sm);
}

.language-btn {
    background: var(--background);
    border: 1px solid var(--border-color);
    padding: 0.5rem 1rem;
    border-radius: var(--radius-sm);
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    transition: var(--transition);
    font-size: 0.9rem;
}

.language-btn:hover {
    border-color: var(--primary-color);
    color: var(--primary-color);
}

.language-btn .current-flag {
    font-size: 1.2rem;
}

.language-btn .current-lang {
    font-weight: 500;
}

.language-btn i {
    font-size: 0.8rem;
    transition: transform 0.3s ease;
}

.language-selector.active .language-btn i {
    transform: rotate(180deg);
}

.language-dropdown {
    position: absolute;
    top: calc(100% + 0.5rem);
    right: 0;
    background: var(--surface);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    box-shadow: 0 4px 12px var(--shadow-lg);
    min-width: 200px;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: var(--transition);
    z-index: 101;
}

.language-selector.active .language-dropdown {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.language-list {
    max-height: 400px;
    overflow-y: auto;
}

.language-option {
    width: 100%;
    background: none;
    border: none;
    padding: 0.75rem 1rem;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    cursor: pointer;
    transition: var(--transition);
    text-align: left;
}

.language-option:hover {
    background: var(--background);
    color: var(--primary-color);
}

.language-option.active {
    background: var(--primary-color);
    color: white;
}

.language-option .flag {
    font-size: 1.5rem;
}

.language-option .name {
    flex: 1;
    font-size: 0.95rem;
}

/* ==========================================
   底部
   ========================================== */
.footer {
    background: var(--surface);
    border-top: 1px solid var(--border-color);
    padding: var(--spacing-lg) 0;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.footer-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-md);
}

.footer-copyright {
    margin: 0;
    color: var(--text-secondary);
}

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

.footer-link {
    color: var(--text-secondary);
    text-decoration: none;
    transition: var(--transition);
    font-size: 0.85rem;
}

.footer-link:hover {
    color: var(--primary-color);
    text-decoration: underline;
}

.footer-separator {
    color: var(--border-color);
}

/* ==========================================
   响应式设计
   ========================================== */
@media (max-width: 1024px) {
    .header-center {
        max-width: 300px;
    }

    .featured-games {
        grid-template-columns: 1fr;
        max-width: 500px;
        margin: 0 auto;
    }

    .games-grid {
        grid-template-columns: 1fr;
        max-width: 500px;
        margin: 0 auto;
    }

    .sidebar {
        width: 100%;
        right: -100%;
    }
}

@media (max-width: 768px) {
    .header .container {
        padding: var(--spacing-sm);
        gap: var(--spacing-xs);
    }

    .header-top {
        gap: var(--spacing-sm);
    }

    .logo {
        font-size: 1.2rem;
    }

    .header-actions {
        gap: 0.25rem;
    }

    .icon-btn {
        font-size: 1.1rem;
        padding: 0.4rem;
    }

    .header-bottom {
        flex-direction: column;
        width: 100%;
    }

    .search-box {
        padding: 0.5rem 0.8rem;
        width: 100%;
    }

    .category-btn {
        width: 100%;
        justify-content: center;
    }

    .category-dropdown {
        right: auto;
        left: 0;
        width: 100%;
        min-width: unset;
    }

    .games-grid {
        grid-template-columns: 1fr;
        max-width: 500px;
        margin: 0 auto;
    }

    .section-header {
        flex-direction: column;
        align-items: flex-start;
    }

    .game-frame-container {
        height: 400px;
    }
}

@media (max-width: 480px) {
    .logo {
        font-size: 1.1rem;
    }

    .header-actions {
        gap: 0;
    }

    .icon-btn {
        font-size: 1rem;
        padding: 0.35rem;
    }

    .category-btn {
        padding: 0.5rem 0.8rem;
        font-size: 0.85rem;
    }

    .category-btn .current-category {
        max-width: 120px;
        overflow: hidden;
        text-overflow: ellipsis;
    }

    .search-box {
        padding: 0.5rem 0.7rem;
        font-size: 0.9rem;
    }

    .section-title {
        font-size: 1.1rem;
    }

    .game-card-thumbnail {
        height: 180px;
    }

    .share-options {
        grid-template-columns: 1fr;
    }
}

/* ==========================================
   工具类
   ========================================== */
.hidden {
    display: none !important;
}

.fade-in {
    animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

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

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

::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 4px;
}

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

/* ==========================================
   广告位样式
   ========================================== */
.ad-container {
    width: 100%;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 0;
    background: transparent;
    margin: var(--spacing-md) 0;
    line-height: 0;
    overflow: hidden;
}

.ad-container.top-ad {
    margin-top: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
}

.ad-container.bottom-ad {
    margin-top: var(--spacing-lg);
    margin-bottom: var(--spacing-sm);
}

.ad-container > div {
    width: 100%;
    max-width: 970px;
    display: flex;
    justify-content: center;
    align-items: center;
}

/* PC端 - 大屏幕 */
@media (min-width: 1024px) {
    .ad-container > div {
        max-width: 970px;
    }
}

/* 平板 - 中等屏幕 */
@media (min-width: 768px) and (max-width: 1023px) {
    .ad-container > div {
        max-width: 728px;
    }
}

/* 移动端 - 小屏幕 */
@media (max-width: 767px) {
    .ad-container {
        margin: var(--spacing-sm) 0;
    }

    .ad-container.top-ad {
        margin-top: 0;
        margin-bottom: var(--spacing-md);
    }

    .ad-container.bottom-ad {
        margin-top: var(--spacing-md);
        margin-bottom: var(--spacing-sm);
    }

    .ad-container > div {
        max-width: 100%;
        padding: 0 var(--spacing-xs);
    }
}