/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Roboto', sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #faf8ef;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Header Styles */
.header {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 1000;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

.navbar {
    padding: 1rem 0;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-logo h1 a {
    color: #776e65;
    text-decoration: none;
    font-size: 1.8rem;
    font-weight: 700;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 2rem;
}

.nav-link {
    color: #776e65;
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s ease;
}

.nav-link:hover {
    color: #f9f6f2;
    background: #8f7a66;
    padding: 0.5rem 1rem;
    border-radius: 3px;
}

.hamburger {
    display: none;
    flex-direction: column;
    cursor: pointer;
}

.bar {
    width: 25px;
    height: 3px;
    background-color: #776e65;
    margin: 3px 0;
    transition: 0.3s;
}

/* Hero Section */
.hero {
    padding: 120px 0 80px;
    background: linear-gradient(135deg, #faf8ef 0%, #f2b179 100%);
    min-height: 100vh;
    display: flex;
    align-items: center;
}

.hero-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 700;
    color: #776e65;
    margin-bottom: 1rem;
    line-height: 1.2;
}

.hero-subtitle {
    font-size: 1.5rem;
    color: #8f7a66;
    margin-bottom: 1.5rem;
    font-weight: 400;
}

.hero-description {
    font-size: 1.1rem;
    color: #776e65;
    margin-bottom: 2rem;
    line-height: 1.8;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
    margin-bottom: 3rem;
}

.btn {
    padding: 1rem 2rem;
    border: none;
    border-radius: 6px;
    font-size: 1rem;
    font-weight: 600;
    text-decoration: none;
    cursor: pointer;
    transition: all 0.3s ease;
    display: inline-block;
}

.btn-primary {
    background: #8f7a66;
    color: #f9f6f2;
}

.btn-primary:hover {
    background: #9f8a76;
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(143, 122, 102, 0.3);
}

.btn-secondary {
    background: transparent;
    color: #8f7a66;
    border: 2px solid #8f7a66;
}

.btn-secondary:hover {
    background: #8f7a66;
    color: #f9f6f2;
    transform: translateY(-2px);
}

.hero-stats {
    display: flex;
    gap: 2rem;
}

.stat {
    text-align: center;
}

.stat-number {
    display: block;
    font-size: 2rem;
    font-weight: 700;
    color: #8f7a66;
}

.stat-label {
    font-size: 0.9rem;
    color: #776e65;
    text-transform: uppercase;
    letter-spacing: 1px;
}

/* Game Preview */
.hero-game-preview {
    display: flex;
    justify-content: center;
    align-items: center;
}

.game-preview-container {
    background: #bbada0;
    border-radius: 10px;
    padding: 15px;
    position: relative;
}

.game-board-preview {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 10px;
    width: 300px;
    height: 300px;
}

.tile {
    background: rgba(238, 228, 218, 0.35);
    border-radius: 6px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 1.2rem;
    color: #776e65;
    animation: tileAppear 0.3s ease-in-out;
}

@keyframes tileAppear {
    0% {
        opacity: 0;
        transform: scale(0);
    }
    100% {
        opacity: 1;
        transform: scale(1);
    }
}

#game-board .tile-2 { background: #eee4da !important; color: #776e65 !important; }
#game-board .tile-4 { background: #ede0c8 !important; color: #776e65 !important; }
#game-board .tile-8 { background: #f2b179 !important; color: #f9f6f2 !important; }
#game-board .tile-16 { background: #f59563 !important; color: #f9f6f2 !important; }
#game-board .tile-32 { background: #f67c5f !important; color: #f9f6f2 !important; }
#game-board .tile-64 { background: #f65e3b !important; color: #f9f6f2 !important; }
#game-board .tile-128 { background: #edcf72 !important; color: #f9f6f2 !important; font-size: 1.7rem; }
#game-board .tile-256 { background: #edcc61 !important; color: #f9f6f2 !important; font-size: 1.7rem; }
#game-board .tile-512 { background: #edc850 !important; color: #f9f6f2 !important; font-size: 1.7rem; }
#game-board .tile-1024 { background: #edc53f !important; color: #f9f6f2 !important; font-size: 1.5rem; }
#game-board .tile-2048 { background: #edc22e !important; color: #f9f6f2 !important; font-size: 1.5rem; box-shadow: 0 0 30px 10px rgba(243, 215, 116, 0.3); }
#game-board .tile-4096 { background: #3c3a33 !important; color: #f9f6f2 !important; font-size: 1.3rem; }
#game-board .tile-8192 { background: #3c3a33 !important; color: #f9f6f2 !important; font-size: 1.2rem; }

/* 保持原有的预览样式 */
.tile-2 { background: #eee4da; color: #776e65; }
.tile-4 { background: #ede0c8; color: #776e65; }
.tile-8 { background: #f2b179; color: #f9f6f2; }
.tile-16 { background: #f59563; color: #f9f6f2; }
.tile-32 { background: #f67c5f; color: #f9f6f2; }
.tile-64 { background: #f65e3b; color: #f9f6f2; }
.tile-128 { background: #edcf72; color: #f9f6f2; font-size: 1rem; }
.tile-256 { background: #edcc61; color: #f9f6f2; font-size: 1rem; }
.tile-512 { background: #edc850; color: #f9f6f2; font-size: 1rem; }
.tile-1024 { background: #edc53f; color: #f9f6f2; font-size: 0.9rem; }
.tile-2048 { background: #edc22e; color: #f9f6f2; font-size: 0.9rem; box-shadow: 0 0 30px 10px rgba(243, 215, 116, 0.2); }

/* Game Section */
.game-section {
    padding: 80px 0;
    background: #faf8ef;
}

.section-title {
    text-align: center;
    font-size: 2.5rem;
    color: #776e65;
    margin-bottom: 3rem;
    font-weight: 700;
}

.game-container {
    max-width: 600px;
    margin: 0 auto;
    background: #bbada0;
    padding: 25px;
    border-radius: 15px;
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.15);
}

.game-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
}

.score-container {
    display: flex;
    gap: 10px;
}

.score-box {
    background: #8f7a66;
    color: #f9f6f2;
    padding: 15px 20px;
    border-radius: 8px;
    text-align: center;
    min-width: 100px;
}

.score-label {
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 8px;
}

.score-value {
    font-size: 1.5rem;
    font-weight: 700;
}

.new-game-btn {
    background: #8f7a66;
    color: #f9f6f2;
    border: none;
    padding: 15px 25px;
    border-radius: 8px;
    cursor: pointer;
    font-weight: 600;
    font-size: 1rem;
    transition: all 0.3s ease;
    box-shadow: 0 3px 10px rgba(143, 122, 102, 0.3);
}

.new-game-btn:hover {
    background: #9f8a76;
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(143, 122, 102, 0.4);
}

.game-board {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 15px;
    background: #bbada0;
    padding: 15px;
    border-radius: 10px;
    margin-bottom: 25px;
    width: 100%;
    aspect-ratio: 1;
}

#game-board .tile {
    aspect-ratio: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 2rem;
    color: #776e65;
    background: rgba(238, 228, 218, 0.35);
    border-radius: 8px;
    transition: all 0.15s ease-in-out;
}

.game-instructions {
    text-align: center;
    color: #776e65;
    font-size: 0.9rem;
    line-height: 1.5;
}

/* How to Play Section */
.how-to-play {
    padding: 80px 0;
    background: #f9f6f2;
}

.instructions-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.instruction-card {
    background: white;
    padding: 2rem;
    border-radius: 10px;
    text-align: center;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease;
}

.instruction-card:hover {
    transform: translateY(-5px);
}

.instruction-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.instruction-card h3 {
    color: #776e65;
    margin-bottom: 1rem;
    font-size: 1.3rem;
}

.instruction-card p {
    color: #8f7a66;
    line-height: 1.6;
}

/* Features Section */
.features {
    padding: 80px 0;
    background: #faf8ef;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.feature-card {
    background: white;
    padding: 2rem;
    border-radius: 10px;
    text-align: center;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease;
}

.feature-card:hover {
    transform: translateY(-5px);
}

.feature-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.feature-card h3 {
    color: #776e65;
    margin-bottom: 1rem;
    font-size: 1.3rem;
}

.feature-card p {
    color: #8f7a66;
    line-height: 1.6;
}

/* Hot Games Section */
.hot-games {
    padding: 80px 0;
    background: #f9f6f2;
}

.game-card.featured {
    position: relative;
    border: 2px solid #f2b179;
    box-shadow: 0 8px 25px rgba(242, 177, 121, 0.3);
}

.game-card.featured::before {
    content: "🔥 HOT";
    position: absolute;
    top: -10px;
    left: 15px;
    background: #f2b179;
    color: white;
    padding: 5px 10px;
    border-radius: 15px;
    font-size: 0.7rem;
    font-weight: 600;
}

.game-icon {
    font-size: 4rem;
    margin-bottom: 1rem;
}

.play-count {
    position: absolute;
    top: 10px;
    right: 10px;
    background: rgba(0, 0, 0, 0.7);
    color: white;
    padding: 5px 8px;
    border-radius: 12px;
    font-size: 0.7rem;
    font-weight: 600;
}

/* New Games Section */
.new-games {
    padding: 80px 0;
    background: #faf8ef;
}

.game-card.new {
    position: relative;
    background: linear-gradient(135deg, #fff 0%, #f0f8ff 100%);
}

.new-badge {
    position: absolute;
    top: 10px;
    left: 10px;
    background: #4CAF50;
    color: white;
    padding: 4px 8px;
    border-radius: 10px;
    font-size: 0.6rem;
    font-weight: 700;
    letter-spacing: 0.5px;
}

/* Game Categories Section */
.game-categories {
    padding: 80px 0;
    background: #f9f6f2;
}

.categories-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.category-card {
    background: white;
    padding: 2.5rem 2rem;
    border-radius: 15px;
    text-align: center;
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
    cursor: pointer;
    position: relative;
    overflow: hidden;
}

.category-card::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, #f2b179, #8f7a66);
    transform: scaleX(0);
    transition: transform 0.3s ease;
}

.category-card:hover::before {
    transform: scaleX(1);
}

.category-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.15);
}

.category-icon {
    font-size: 4rem;
    margin-bottom: 1.5rem;
}

.category-card h3 {
    color: #776e65;
    font-size: 1.4rem;
    margin-bottom: 1rem;
}

.category-card p {
    color: #8f7a66;
    line-height: 1.6;
    margin-bottom: 1.5rem;
}

.game-count {
    background: #8f7a66;
    color: #f9f6f2;
    padding: 8px 16px;
    border-radius: 20px;
    font-weight: 600;
    font-size: 0.9rem;
    display: inline-block;
}

/* Category-specific colors */
.category-card.puzzle .category-icon { color: #9c27b0; }
.category-card.action .category-icon { color: #f44336; }
.category-card.adventure .category-icon { color: #4caf50; }
.category-card.sports .category-icon { color: #ff9800; }
.category-card.racing .category-icon { color: #2196f3; }
.category-card.strategy .category-icon { color: #795548; }

/* Top Rated Games Section */
.top-rated-games {
    padding: 80px 0;
    background: #faf8ef;
}

.top-games-list {
    max-width: 800px;
    margin: 3rem auto 0;
}

.top-game-item {
    background: white;
    padding: 1.5rem;
    border-radius: 10px;
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    gap: 1.5rem;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease;
}

.top-game-item:hover {
    transform: translateX(10px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
}

.rank {
    background: #8f7a66;
    color: #f9f6f2;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 1.2rem;
    flex-shrink: 0;
}

.top-game-item:nth-child(1) .rank {
    background: #FFD700;
    color: #333;
}

.top-game-item:nth-child(2) .rank {
    background: #C0C0C0;
    color: #333;
}

.top-game-item:nth-child(3) .rank {
    background: #CD7F32;
    color: white;
}

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

.game-info .game-icon {
    font-size: 2.5rem;
    margin: 0;
}

.game-details h4 {
    color: #776e65;
    font-size: 1.1rem;
    margin-bottom: 0.3rem;
}

.game-details p {
    color: #8f7a66;
    font-size: 0.9rem;
    margin: 0;
}

.game-rating {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.3rem;
}

.rating-stars {
    color: #FFD700;
    font-size: 0.9rem;
}

.rating-score {
    color: #776e65;
    font-weight: 600;
    font-size: 0.9rem;
}

.top-game-item .play-count {
    position: static;
    background: #f2b179;
    color: white;
    padding: 8px 12px;
    border-radius: 15px;
    font-size: 0.8rem;
    font-weight: 600;
}

/* Similar Games Section */
.similar-games {
    padding: 80px 0;
    background: #f9f6f2;
}

.games-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.game-card {
    background: white;
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease;
}

.game-card:hover {
    transform: translateY(-5px);
}

.game-thumbnail {
    height: 150px;
    background: #bbada0;
    display: flex;
    align-items: center;
    justify-content: center;
}

.game-preview-mini {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 5px;
    width: 80px;
    height: 80px;
}

.mini-tile {
    background: #eee4da;
    border-radius: 3px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 0.8rem;
    color: #776e65;
}

.game-card h3 {
    padding: 1rem;
    color: #776e65;
    font-size: 1.2rem;
    margin-bottom: 0.5rem;
}

.game-card p {
    padding: 0 1rem;
    color: #8f7a66;
    font-size: 0.9rem;
    margin-bottom: 1rem;
}

.game-stats {
    padding: 0 1rem 1rem;
    display: flex;
    justify-content: space-between;
    font-size: 0.8rem;
    color: #776e65;
}

/* About Section */
.about {
    padding: 80px 0;
    background: #faf8ef;
}

.about-content {
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
}

.about-content p {
    font-size: 1.1rem;
    line-height: 1.8;
    color: #776e65;
    margin-bottom: 1.5rem;
}

/* Footer */
.footer {
    background: #8f7a66;
    color: #f9f6f2;
    padding: 60px 0 20px;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-bottom: 2rem;
}

.footer-section h3,
.footer-section h4 {
    margin-bottom: 1rem;
    color: #f9f6f2;
}

.footer-section ul {
    list-style: none;
}

.footer-section ul li {
    margin-bottom: 0.5rem;
}

.footer-section a {
    color: #f9f6f2;
    text-decoration: none;
    opacity: 0.8;
    transition: opacity 0.3s ease;
}

.footer-section a:hover {
    opacity: 1;
}

.social-links {
    display: flex;
    gap: 1rem;
}

.social-links a {
    font-size: 1.5rem;
}

.footer-bottom {
    border-top: 1px solid rgba(249, 246, 242, 0.2);
    padding-top: 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1rem;
}

.footer-links {
    display: flex;
    gap: 2rem;
}

/* Responsive Design */
@media (max-width: 768px) {
    .hamburger {
        display: flex;
    }
    
    .nav-menu {
        position: fixed;
        left: -100%;
        top: 70px;
        flex-direction: column;
        background-color: white;
        width: 100%;
        text-align: center;
        transition: 0.3s;
        box-shadow: 0 10px 27px rgba(0, 0, 0, 0.05);
        padding: 2rem 0;
    }
    
    .nav-menu.active {
        left: 0;
    }
    
    .hero-container {
        grid-template-columns: 1fr;
        text-align: center;
        gap: 2rem;
    }
    
    .hero-title {
        font-size: 2.5rem;
    }
    
    .hero-buttons {
        justify-content: center;
        flex-wrap: wrap;
    }
    
    .hero-stats {
        justify-content: center;
    }
    
    .game-board-preview {
        width: 250px;
        height: 250px;
    }
    
    .instructions-grid,
    .features-grid,
    .games-grid,
    .categories-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-bottom {
        flex-direction: column;
        text-align: center;
    }
    
    .game-header {
        flex-direction: column;
        gap: 1rem;
        align-items: center;
    }
    
    .top-game-item {
        flex-direction: column;
        text-align: center;
        gap: 1rem;
    }
    
    .game-info {
        flex-direction: column;
        text-align: center;
    }
    
    .category-card {
        padding: 2rem 1.5rem;
    }
    
    .category-icon {
        font-size: 3rem;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 2rem;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .game-container {
        margin: 0 15px;
        padding: 20px;
        max-width: 90vw;
    }
    
    .game-board {
        gap: 10px;
        padding: 10px;
    }
    
    #game-board .tile {
        font-size: 1.5rem !important;
    }
    
    #game-board .tile-128,
    #game-board .tile-256,
    #game-board .tile-512 {
        font-size: 1.3rem !important;
    }
    
    #game-board .tile-1024,
    #game-board .tile-2048,
    #game-board .tile-4096,
    #game-board .tile-8192 {
        font-size: 1.1rem !important;
    }
    
    .game-board-preview {
        width: 200px;
        height: 200px;
    }
    
    .tile {
        font-size: 1rem;
    }
    
    .container {
        padding: 0 15px;
    }
}

/* Game Animation */
@keyframes slideUp {
    0% {
        transform: translateY(100px);
        opacity: 0;
    }
    100% {
        transform: translateY(0);
        opacity: 1;
    }
}

@keyframes fadeIn {
    0% {
        opacity: 0;
    }
    100% {
        opacity: 1;
    }
}

.game-section {
    animation: slideUp 0.8s ease-out;
}

.hero-content {
    animation: fadeIn 1s ease-out;
}

.hero-game-preview {
    animation: fadeIn 1s ease-out 0.3s both;
}