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

:root {
    --primary-color: #6366f1;
    --secondary-color: #8b5cf6;
    --accent-color: #ec4899;
    --dark-bg: #0f172a;
    --card-bg: #1e293b;
    --card-hover: #334155;
    --text-primary: #f8fafc;
    --text-secondary: #cbd5e1;
    --text-muted: #94a3b8;
    --border-color: #334155;
    --gradient-1: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --gradient-2: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    --gradient-3: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.2);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.3);
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

body {
    font-family: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background: var(--dark-bg);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
}

.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 24px;
}

/* ==================== 导航栏 ==================== */
.header {
    position: sticky;
    top: 0;
    z-index: 1000;
    background: rgba(15, 23, 42, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-color);
}

.navbar {
    padding: 0;
}

.nav-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 16px 24px;
    display: grid;
    grid-template-columns: 1fr auto 1fr;
    align-items: center;
    gap: 24px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 24px;
    font-weight: 900;
    color: var(--text-primary);
    text-decoration: none;
    transition: var(--transition);
    justify-self: start;
}

.logo i {
    color: var(--primary-color);
    font-size: 28px;
}

.logo:hover {
    transform: translateY(-2px);
}

.nav-menu {
    display: flex;
    gap: 8px;
    justify-self: center;
}

.nav-link {
    padding: 10px 20px;
    color: var(--text-secondary);
    text-decoration: none;
    border-radius: 8px;
    transition: var(--transition);
    font-weight: 500;
}

.nav-link:hover,
.nav-link.active {
    color: var(--text-primary);
    background: var(--card-bg);
}

.nav-actions {
    display: flex;
    justify-self: end;
    gap: 12px;
}

.gift-btn {
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #ff6b6b 0%, #ff8787 100%);
    color: white;
    border-radius: 10px;
    text-decoration: none;
    transition: var(--transition);
    box-shadow: 0 2px 8px rgba(255, 107, 107, 0.3);
    position: relative;
}

.gift-btn:hover {
    transform: translateY(-3px) scale(1.05);
    box-shadow: 0 6px 16px rgba(255, 107, 107, 0.4);
}

.gift-btn i {
    font-size: 20px;
    animation: giftBounce 2s ease-in-out infinite;
}

@keyframes giftBounce {
    0%, 100% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.1);
    }
}

.gift-btn::before {
    content: '';
    position: absolute;
    top: -2px;
    right: -2px;
    width: 8px;
    height: 8px;
    background: #4ade80;
    border-radius: 50%;
    border: 2px solid var(--dark-bg);
    animation: pulse 2s ease-in-out infinite;
}

/* ==================== 主横幅 ==================== */
.hero {
    position: relative;
    min-height: 700px;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    background: linear-gradient(135deg, #1e293b 0%, #0f172a 100%);
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(circle at 50% 50%, rgba(99, 102, 241, 0.1) 0%, transparent 70%);
}

.hero-content {
    position: relative;
    z-index: 2;
    text-align: center;
    padding: 80px 24px;
}

.hero-title {
    font-size: 72px;
    font-weight: 900;
    margin-bottom: 24px;
    line-height: 1.1;
}

.title-line {
    display: block;
}

.gradient-text {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 50%, #f093fb 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 20px;
    color: var(--text-secondary);
    margin-bottom: 48px;
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
}

.hero-stats {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 48px;
    margin-bottom: 48px;
}

.stat-item {
    text-align: center;
}

.stat-number {
    font-size: 48px;
    font-weight: 900;
    background: linear-gradient(135deg, #667eea 0%, #f093fb 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.stat-label {
    font-size: 14px;
    color: var(--text-muted);
    margin-top: 8px;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.stat-divider {
    width: 1px;
    height: 60px;
    background: var(--border-color);
}

.hero-actions {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 16px 32px;
    border: none;
    border-radius: 12px;
    font-size: 16px;
    font-weight: 600;
    text-decoration: none;
    cursor: pointer;
    transition: var(--transition);
    white-space: nowrap;
}

.btn-primary {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    box-shadow: 0 4px 16px rgba(102, 126, 234, 0.4);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 24px rgba(102, 126, 234, 0.5);
}

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

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

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

.btn-outline:hover {
    background: var(--card-bg);
    border-color: var(--primary-color);
}

.hero-decoration {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    pointer-events: none;
    overflow: hidden;
}

.decoration-circle {
    position: absolute;
    border-radius: 50%;
    opacity: 0.1;
    animation: float 20s infinite ease-in-out;
}

.circle-1 {
    width: 400px;
    height: 400px;
    background: var(--primary-color);
    top: -200px;
    left: -200px;
    animation-delay: 0s;
}

.circle-2 {
    width: 300px;
    height: 300px;
    background: var(--secondary-color);
    bottom: -150px;
    right: -150px;
    animation-delay: 5s;
}

.circle-3 {
    width: 200px;
    height: 200px;
    background: var(--accent-color);
    top: 50%;
    right: 10%;
    animation-delay: 10s;
}

@keyframes float {
    0%, 100% {
        transform: translate(0, 0) scale(1);
    }
    50% {
        transform: translate(50px, 50px) scale(1.1);
    }
}

/* ==================== 分类标签 ==================== */
.categories {
    padding: 80px 0 40px;
}

.section-header {
    text-align: center;
    margin-bottom: 48px;
}

.section-title {
    font-size: 42px;
    font-weight: 900;
    margin-bottom: 16px;
    display: inline-flex;
    align-items: center;
    gap: 16px;
}

.section-title i {
    color: var(--primary-color);
}

.section-subtitle {
    font-size: 18px;
    color: var(--text-secondary);
}

.category-filters {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    justify-content: center;
}

.category-btn {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 14px 24px;
    background: var(--card-bg);
    border: 2px solid var(--border-color);
    color: var(--text-secondary);
    border-radius: 12px;
    cursor: pointer;
    transition: var(--transition);
    font-size: 15px;
    font-weight: 500;
}

.category-btn:hover {
    background: var(--card-hover);
    border-color: var(--primary-color);
    color: var(--text-primary);
    transform: translateY(-2px);
}

.category-btn.active {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-color: transparent;
    color: white;
    box-shadow: 0 4px 16px rgba(102, 126, 234, 0.4);
}

.category-count {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 28px;
    height: 28px;
    padding: 0 8px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 14px;
    font-size: 13px;
    font-weight: 700;
}

.category-btn.active .category-count {
    background: rgba(255, 255, 255, 0.2);
}

/* ==================== 游戏列表 ==================== */
.games-section {
    padding: 40px 0 80px;
}

.games-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 24px;
    margin-bottom: 48px;
}

.game-card {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    overflow: hidden;
    transition: var(--transition);
    cursor: pointer;
    position: relative;
}

.game-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 16px 48px rgba(0, 0, 0, 0.3);
    border-color: var(--primary-color);
}

.game-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, #667eea 0%, #764ba2 50%, #f093fb 100%);
    opacity: 0;
    transition: var(--transition);
}

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

.game-thumbnail {
    position: relative;
    width: 100%;
    height: 200px;
    overflow: hidden;
    background: var(--card-hover);
}

.game-thumbnail img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition);
}

.game-card:hover .game-thumbnail img {
    transform: scale(1.1);
}

.game-badge {
    position: absolute;
    top: 12px;
    right: 12px;
    padding: 6px 12px;
    background: rgba(0, 0, 0, 0.8);
    backdrop-filter: blur(10px);
    color: white;
    border-radius: 8px;
    font-size: 12px;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 6px;
}

.game-info {
    padding: 20px;
}

.game-header {
    margin-bottom: 12px;
}

.game-title {
    font-size: 20px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 4px;
    display: -webkit-box;
    -webkit-line-clamp: 1;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.game-title-en {
    font-size: 13px;
    color: var(--text-muted);
    display: -webkit-box;
    -webkit-line-clamp: 1;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.game-description {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: 16px;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.game-footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding-top: 16px;
    border-top: 1px solid var(--border-color);
}

.game-links {
    display: flex;
    gap: 8px;
}

.game-link-btn {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 8px 14px;
    background: var(--card-hover);
    color: var(--text-secondary);
    border: none;
    border-radius: 8px;
    font-size: 13px;
    text-decoration: none;
    transition: var(--transition);
}

.game-link-btn:hover {
    background: var(--primary-color);
    color: white;
    transform: translateY(-2px);
}

.game-view-btn {
    padding: 8px 16px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border: none;
    border-radius: 8px;
    font-size: 13px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 6px;
}

.game-view-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(102, 126, 234, 0.4);
}

/* ==================== 状态 ==================== */
.loading-state {
    text-align: center;
    padding: 80px 20px;
}

.loading-spinner {
    width: 48px;
    height: 48px;
    border: 4px solid var(--border-color);
    border-top-color: var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin: 0 auto 20px;
}

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

.empty-state {
    text-align: center;
    padding: 80px 20px;
}

.empty-state i {
    font-size: 64px;
    color: var(--text-muted);
    margin-bottom: 24px;
}

.empty-state h3 {
    font-size: 24px;
    margin-bottom: 12px;
    color: var(--text-primary);
}

.empty-state p {
    font-size: 16px;
    color: var(--text-secondary);
    margin-bottom: 24px;
}

.load-more-container {
    text-align: center;
}

/* ==================== 特色功能 ==================== */
.features-section {
    padding: 80px 0;
    background: linear-gradient(180deg, transparent 0%, rgba(30, 41, 59, 0.5) 100%);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 24px;
}

.feature-card {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 32px;
    text-align: center;
    transition: var(--transition);
}

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

.feature-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto 24px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 36px;
    color: white;
}

.feature-card h3 {
    font-size: 22px;
    font-weight: 700;
    margin-bottom: 12px;
    color: var(--text-primary);
}

.feature-card p {
    font-size: 15px;
    color: var(--text-secondary);
    line-height: 1.6;
}

/* ==================== 网站地图 ==================== */
.sitemap-section {
    padding: 80px 0;
    background: linear-gradient(180deg, rgba(30, 41, 59, 0.3) 0%, var(--card-bg) 100%);
    border-top: 1px solid var(--border-color);
}

.sitemap-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 40px;
    margin-bottom: 60px;
}

.sitemap-column {
    background: var(--dark-bg);
    padding: 30px;
    border-radius: 16px;
    border: 1px solid var(--border-color);
    transition: var(--transition);
}

.sitemap-column:hover {
    border-color: var(--primary-color);
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.sitemap-column-title {
    font-size: 18px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 20px;
    display: flex;
    align-items: center;
    gap: 10px;
    padding-bottom: 15px;
    border-bottom: 2px solid var(--border-color);
}

.sitemap-column-title i {
    color: var(--primary-color);
    font-size: 20px;
}

.sitemap-links {
    list-style: none;
}

.sitemap-links li {
    margin-bottom: 12px;
}

.sitemap-links a {
    display: flex;
    align-items: center;
    gap: 10px;
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 15px;
    transition: var(--transition);
    padding: 8px 0;
}

.sitemap-links a i {
    font-size: 12px;
    color: var(--text-muted);
    transition: var(--transition);
}

.sitemap-links a:hover {
    color: var(--primary-color);
    padding-left: 8px;
}

.sitemap-links a:hover i {
    color: var(--primary-color);
}

.sitemap-games {
    margin-top: 60px;
    padding-top: 60px;
    border-top: 2px solid var(--border-color);
}

.sitemap-games-title {
    font-size: 24px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 30px;
    display: flex;
    align-items: center;
    gap: 12px;
}

.sitemap-games-title i {
    color: #ff6b6b;
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% {
        opacity: 1;
        transform: scale(1);
    }
    50% {
        opacity: 0.8;
        transform: scale(1.1);
    }
}

.sitemap-games-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 16px;
}

.sitemap-game-link {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 12px 16px;
    background: var(--dark-bg);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 14px;
    font-weight: 500;
    transition: var(--transition);
}

.sitemap-game-link:hover {
    background: var(--card-hover);
    border-color: var(--primary-color);
    color: var(--text-primary);
    transform: translateX(5px);
}

.sitemap-game-icon {
    width: 20px;
    height: 20px;
    object-fit: contain;
    flex-shrink: 0;
    border-radius: 4px;
    background: rgba(255, 255, 255, 0.1);
    padding: 2px;
}

.sitemap-game-icon-fallback {
    display: none;
    color: var(--primary-color);
    font-size: 16px;
    flex-shrink: 0;
}

.sitemap-game-link:hover .sitemap-game-icon {
    transform: scale(1.1);
    box-shadow: 0 2px 8px rgba(102, 126, 234, 0.3);
}

/* ==================== 页脚 ==================== */
.footer {
    background: var(--card-bg);
    border-top: 1px solid var(--border-color);
    padding: 60px 0 30px;
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 48px;
    margin-bottom: 40px;
}

.footer-section h3,
.footer-section h4 {
    font-size: 18px;
    font-weight: 700;
    margin-bottom: 20px;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 8px;
}

.footer-section h3 i {
    color: var(--primary-color);
}

.footer-section p {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: 20px;
}

.social-links {
    display: flex;
    gap: 12px;
}

.social-links a {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--card-hover);
    color: var(--text-secondary);
    border-radius: 10px;
    text-decoration: none;
    transition: var(--transition);
    font-size: 18px;
}

.social-links a:hover {
    background: var(--primary-color);
    color: white;
    transform: translateY(-3px);
}

.footer-links {
    list-style: none;
}

.footer-links li {
    margin-bottom: 12px;
}

.footer-links a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 14px;
    transition: var(--transition);
    display: inline-block;
}

.footer-links a:hover {
    color: var(--primary-color);
    transform: translateX(5px);
}

.footer-bottom {
    padding-top: 30px;
    border-top: 1px solid var(--border-color);
    text-align: center;
}

.footer-bottom p {
    font-size: 13px;
    color: var(--text-muted);
    line-height: 1.8;
}

/* ==================== 返回顶部 ==================== */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border: none;
    border-radius: 12px;
    cursor: pointer;
    font-size: 20px;
    box-shadow: 0 4px 16px rgba(102, 126, 234, 0.4);
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
    z-index: 999;
}

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

.back-to-top:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 24px rgba(102, 126, 234, 0.5);
}

/* ==================== 响应式设计 ==================== */
@media (max-width: 1200px) {
    .games-grid {
        grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    }
}

@media (max-width: 900px) {
    .features-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .hero-title {
        font-size: 48px;
    }

    .hero-stats {
        flex-wrap: wrap;
        gap: 20px;
        justify-content: space-around;
    }

    .stat-item {
        flex: 0 0 calc(33.333% - 14px);
        min-width: 90px;
    }

    .stat-number {
        font-size: 36px;
    }

    .stat-label {
        font-size: 12px;
    }

    .stat-divider {
        display: none;
    }

    .nav-container {
        grid-template-columns: auto 1fr;
    }

    .nav-menu {
        display: none;
    }

    .nav-actions {
        justify-self: end;
    }

    .section-title {
        font-size: 32px;
    }

    .category-filters {
        justify-content: flex-start;
        overflow-x: auto;
        flex-wrap: nowrap;
        padding-bottom: 10px;
    }

    .category-btn {
        flex-shrink: 0;
    }

    .games-grid {
        grid-template-columns: 1fr;
    }

    .features-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 20px;
    }

    .footer-content {
        grid-template-columns: 1fr;
        gap: 32px;
    }
    
    .sitemap-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 20px;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 36px;
    }

    .hero-subtitle {
        font-size: 16px;
    }

    .hero-stats {
        gap: 16px;
    }

    .stat-item {
        flex: 0 0 calc(33.333% - 11px);
        min-width: 80px;
    }

    .stat-number {
        font-size: 32px;
    }

    .stat-label {
        font-size: 11px;
    }

    .hero-actions {
        flex-direction: column;
        width: 100%;
    }

    .btn {
        width: 100%;
        justify-content: center;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
        gap: 16px;
    }
    
    .sitemap-grid {
        grid-template-columns: 1fr;
        gap: 16px;
    }
}