/* ========================================
   全局基础样式重置
   ======================================== */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
}

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

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

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

a:hover {
    color: var(--color-primary-dark);
}

ul, ol {
    list-style: none;
}

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

input, textarea, select {
    font-family: inherit;
    font-size: inherit;
}

/* ========================================
   加载动画
   ======================================== */
.page-loader {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--color-bg-white);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: var(--z-toast);
    transition: opacity var(--transition-slow), visibility var(--transition-slow);
}

.page-loader.hidden {
    opacity: 0;
    visibility: hidden;
}

.loader-spinner {
    width: 48px;
    height: 48px;
    border: 4px solid var(--color-primary-bg);
    border-top-color: var(--color-primary);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

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

/* ========================================
   容器与布局
   ======================================== */
.container {
    width: 100%;
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

.container-wide {
    max-width: var(--container-wide);
}

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

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

.section-title {
    font-size: var(--font-size-2xl);
    font-weight: var(--font-bold);
    color: var(--color-text);
    position: relative;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -6px;
    left: 0;
    width: 40px;
    height: 3px;
    background: var(--color-primary-gradient);
    border-radius: var(--radius-full);
}

.section-link {
    font-size: var(--font-size-sm);
    font-weight: var(--font-medium);
    color: var(--color-primary);
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
}

.section-link:hover {
    gap: var(--spacing-sm);
}

/* ========================================
   按钮系统
   ======================================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    padding: 10px 24px;
    font-size: var(--font-size-sm);
    font-weight: var(--font-semibold);
    border-radius: var(--radius-md);
    transition: all var(--transition-base);
    white-space: nowrap;
}

.btn-primary {
    background: var(--color-primary-gradient);
    color: var(--color-text-white);
    box-shadow: 0 2px 8px rgba(26, 143, 255, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 16px rgba(26, 143, 255, 0.4);
    color: var(--color-text-white);
}

.btn-secondary {
    background: var(--color-bg-white);
    color: var(--color-text);
    border: 1px solid var(--color-secondary-light);
}

.btn-secondary:hover {
    border-color: var(--color-primary);
    color: var(--color-primary);
    transform: translateY(-1px);
}

.btn-ghost {
    color: var(--color-text-light);
    padding: 8px 16px;
}

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

.btn-sm {
    padding: 6px 16px;
    font-size: var(--font-size-xs);
}

.btn-lg {
    padding: 14px 32px;
    font-size: var(--font-size-md);
}

.btn-icon {
    width: 40px;
    height: 40px;
    padding: 0;
    border-radius: var(--radius-sm);
}

/* ========================================
   卡片系统
   ======================================== */
.game-card {
    background: var(--color-bg-card);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-card);
    transition: all var(--transition-base);
    cursor: pointer;
    position: relative;
}

.game-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-card-hover);
}

.game-card-thumb {
    position: relative;
    aspect-ratio: 16/10;
    overflow: hidden;
    background: var(--color-bg);
}

.game-card-thumb img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-slow);
}

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

.game-card-tags {
    position: absolute;
    top: var(--spacing-sm);
    left: var(--spacing-sm);
    display: flex;
    gap: var(--spacing-xs);
    z-index: 2;
}

.game-card-play {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%) scale(0);
    width: 48px;
    height: 48px;
    background: var(--color-primary-gradient);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: transform var(--transition-base);
    z-index: 2;
}

.game-card:hover .game-card-play {
    transform: translate(-50%, -50%) scale(1);
}

.game-card-play svg {
    width: 20px;
    height: 20px;
    fill: var(--color-text-white);
}

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

.game-card-title {
    font-size: var(--font-size-md);
    font-weight: var(--font-semibold);
    color: var(--color-text);
    margin-bottom: var(--spacing-xs);
    display: -webkit-box;
    -webkit-line-clamp: 1;
    -webkit-box-orient: vertical;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.game-card-meta {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: var(--font-size-xs);
    color: var(--color-text-light);
}

.game-card-rating {
    display: flex;
    align-items: center;
    gap: 2px;
    color: var(--color-warning);
}

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

/* ========================================
   标签/徽章
   ======================================== */
.tag {
    display: inline-flex;
    align-items: center;
    padding: 2px 8px;
    font-size: 11px;
    font-weight: var(--font-semibold);
    border-radius: var(--radius-full);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.tag-hot {
    background: rgba(239, 68, 68, 0.15);
    color: var(--tag-hot);
}

.tag-new {
    background: rgba(16, 185, 129, 0.15);
    color: var(--tag-new);
}

.tag-casual {
    background: rgba(139, 92, 246, 0.15);
    color: var(--tag-casual);
}

.tag-challenging {
    background: rgba(245, 158, 11, 0.15);
    color: var(--tag-challenging);
}

.tag-kids {
    background: rgba(6, 182, 212, 0.15);
    color: var(--tag-kids);
}

.tag-category {
    background: var(--color-primary-bg);
    color: var(--color-primary);
}

/* ========================================
   网格布局
   ======================================== */
.game-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--spacing-lg);
}

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

.game-grid-5 {
    grid-template-columns: repeat(5, 1fr);
}

.game-grid-6 {
    grid-template-columns: repeat(6, 1fr);
}

/* ========================================
   星级评分
   ======================================== */
.stars {
    display: inline-flex;
    gap: 1px;
}

.stars svg {
    width: 14px;
    height: 14px;
}

.star-filled {
    fill: var(--color-warning);
}

.star-empty {
    fill: #e2e8f0;
}

/* ========================================
   搜索框
   ======================================== */
.search-box {
    position: relative;
    width: 100%;
    max-width: 400px;
}

.search-box input {
    width: 100%;
    padding: 10px 16px 10px 40px;
    background: var(--color-bg);
    border: 1px solid transparent;
    border-radius: var(--radius-full);
    font-size: var(--font-size-sm);
    color: var(--color-text);
    transition: all var(--transition-base);
}

.search-box input:focus {
    outline: none;
    border-color: var(--color-primary);
    background: var(--color-bg-white);
    box-shadow: 0 0 0 3px rgba(26, 143, 255, 0.1);
}

.search-box input::placeholder {
    color: var(--color-text-light);
}

.search-box-icon {
    position: absolute;
    left: 14px;
    top: 50%;
    transform: translateY(-50%);
    width: 16px;
    height: 16px;
    color: var(--color-text-light);
}

.search-results {
    position: absolute;
    top: calc(100% + 8px);
    left: 0;
    width: 100%;
    background: var(--color-bg-white);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    max-height: 360px;
    overflow-y: auto;
    z-index: var(--z-dropdown);
    display: none;
}

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

.search-result-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    transition: background var(--transition-fast);
    cursor: pointer;
}

.search-result-item:hover {
    background: var(--color-primary-bg);
}

.search-result-item img {
    width: 48px;
    height: 48px;
    border-radius: var(--radius-sm);
    object-fit: cover;
}

.search-result-info h4 {
    font-size: var(--font-size-sm);
    font-weight: var(--font-medium);
}

.search-result-info span {
    font-size: var(--font-size-xs);
    color: var(--color-text-light);
}

/* ========================================
   难度标识
   ======================================== */
.difficulty {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    font-size: var(--font-size-xs);
    font-weight: var(--font-medium);
}

.difficulty-easy {
    color: var(--color-success);
}

.difficulty-medium {
    color: var(--color-warning);
}

.difficulty-hard {
    color: var(--color-danger);
}

/* ========================================
   设备标识
   ======================================== */
.devices {
    display: inline-flex;
    gap: var(--spacing-xs);
}

.device-icon {
    width: 16px;
    height: 16px;
    color: var(--color-text-light);
}

/* ========================================
   空状态
   ======================================== */
.empty-state {
    text-align: center;
    padding: var(--spacing-3xl);
    color: var(--color-text-light);
}

.empty-state svg {
    width: 64px;
    height: 64px;
    margin: 0 auto var(--spacing-md);
    color: var(--color-secondary-light);
}

.empty-state h3 {
    font-size: var(--font-size-lg);
    margin-bottom: var(--spacing-sm);
    color: var(--color-text);
}

/* ========================================
   分页
   ======================================== */
.pagination {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-2xl);
}

.pagination-btn {
    min-width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-sm);
    font-size: var(--font-size-sm);
    font-weight: var(--font-medium);
    color: var(--color-text);
    background: var(--color-bg-white);
    border: 1px solid var(--color-secondary-light);
    transition: all var(--transition-fast);
}

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

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

.pagination-btn:disabled {
    opacity: 0.4;
    cursor: not-allowed;
}

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

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

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

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

/* ========================================
   通用工具类
   ======================================== */
.text-center { text-align: center; }
.text-primary { color: var(--color-primary); }
.text-light { color: var(--color-text-light); }
.font-bold { font-weight: var(--font-bold); }
.mt-sm { margin-top: var(--spacing-sm); }
.mt-md { margin-top: var(--spacing-md); }
.mt-lg { margin-top: var(--spacing-lg); }
.mt-xl { margin-top: var(--spacing-xl); }
.mb-sm { margin-bottom: var(--spacing-sm); }
.mb-md { margin-bottom: var(--spacing-md); }
.mb-lg { margin-bottom: var(--spacing-lg); }
.mb-xl { margin-bottom: var(--spacing-xl); }
.flex { display: flex; }
.flex-wrap { flex-wrap: wrap; }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }
.gap-sm { gap: var(--spacing-sm); }
.gap-md { gap: var(--spacing-md); }
.gap-lg { gap: var(--spacing-lg); }
.hidden { display: none !important; }
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    border: 0;
}

/* ========================================
   移动端搜索框样式
   ======================================== */
.mobile-search-box {
    position: relative;
    width: 100%;
}

.mobile-search-box input {
    width: 100%;
    padding: 10px 14px 10px 36px;
    background: var(--color-bg);
    border: 1px solid transparent;
    border-radius: var(--radius-full);
    font-size: 14px;
    color: var(--color-text);
    transition: all var(--transition-base);
    box-sizing: border-box;
}

.mobile-search-box input:focus {
    outline: none;
    border-color: var(--color-primary);
    background: var(--color-bg-white);
}

.mobile-search-box input::placeholder {
    color: var(--color-text-light);
}

.mobile-search-box .search-box-icon {
    position: absolute;
    left: 12px;
    top: 50%;
    transform: translateY(-50%);
    width: 14px;
    height: 14px;
    color: var(--color-text-light);
}

/* ========================================
   移动端全局适配
   ======================================== */
@media (max-width: 768px) {
    .game-card-body {
        padding: var(--spacing-sm) var(--spacing-md);
    }

    .game-card-title {
        font-size: var(--font-size-sm);
    }

    .game-card-meta {
        font-size: 10px;
    }

    .game-card-thumb {
        aspect-ratio: 16/11;
    }

    .stars svg {
        width: 12px;
        height: 12px;
    }

    .tag {
        padding: 1px 6px;
        font-size: 10px;
    }

    .page-loader .loader-spinner {
        width: 36px;
        height: 36px;
    }

    .content-section {
        padding: var(--spacing-lg);
    }
}

@media (max-width: 480px) {
    .game-card-body {
        padding: 6px 10px;
    }

    .game-card-title {
        font-size: 12px;
    }

    .game-card-meta {
        font-size: 10px;
        gap: 4px;
    }

    .stars svg {
        width: 10px;
        height: 10px;
    }

    .tag {
        padding: 1px 5px;
        font-size: 9px;
    }

    .btn {
        padding: 8px 16px;
        font-size: 12px;
    }

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

    .content-section h2 {
        font-size: var(--font-size-md);
    }

    .content-section p {
        font-size: var(--font-size-xs);
    }
}