/* Base styles and variables */
:root {
    /* Apple-inspired color palette */
    --primary-color: #007AFF; /* Apple Blue */
    --secondary-color: #5AC8FA; /* Light Blue */
    --accent-color: #FF9500; /* Orange */
    --background-light: #F5F5F7; /* Light Gray */
    --background-dark: #1D1D1F; /* Dark Gray */
    --text-color: #333333; /* Dark Text */
    --text-light: #86868B; /* Light Text */
    --success-color: #34C759; /* Green */
    --warning-color: #FF3B30; /* Red */
    --white: #FFFFFF;
    --black: #000000;
    
    /* Typography */
    --font-primary: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
    
    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    
    /* Border radius */
    --border-radius-sm: 4px;
    --border-radius-md: 8px;
    --border-radius-lg: 16px;
    
    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-medium: 300ms ease;
    --transition-slow: 500ms ease;
}

/* Reset and base styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: var(--font-primary);
    line-height: 1.6;
    color: var(--text-color);
    background-color: var(--background-light);
    overflow-x: hidden;
}

.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

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

a:hover {
    color: var(--secondary-color);
}

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

h1, h2, h3, h4, h5, h6 {
    margin-bottom: var(--spacing-md);
    line-height: 1.2;
}

p {
    margin-bottom: var(--spacing-md);
}

ul {
    list-style: none;
}

/* Button styles */
.btn {
    display: inline-block;
    padding: var(--spacing-sm) var(--spacing-lg);
    border-radius: var(--border-radius-md);
    font-weight: 600;
    text-align: center;
    cursor: pointer;
    transition: all var(--transition-medium);
    border: none;
    outline: none;
}

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

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

/* Header styles */
.site-header {
    background-color: var(--white);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    position: sticky;
    top: 0;
    z-index: 100;
    padding: var(--spacing-md) 0;
}

.site-header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo h1 {
    font-size: 2rem;
    font-weight: 700;
    color: var(--text-color);
    margin-bottom: 0;
}

.tagline {
    font-size: 1rem;
    color: var(--text-light);
    margin-bottom: 0;
}

.main-nav ul {
    display: flex;
    gap: var(--spacing-lg);
}

.main-nav a {
    font-weight: 500;
    transition: color var(--transition-fast);
}

.main-nav a:hover {
    color: var(--accent-color);
}

/* Mobile Navigation Toggle */
.mobile-nav-toggle {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    width: 30px;
    height: 24px;
    position: relative;
    padding: 0;
}

.mobile-nav-toggle span {
    display: block;
    position: absolute;
    height: 3px;
    width: 100%;
    background: var(--text-color);
    border-radius: 3px;
    opacity: 1;
    left: 0;
    transform: rotate(0deg);
    transition: var(--transition-fast);
}

.mobile-nav-toggle span:nth-child(1) {
    top: 0;
}

.mobile-nav-toggle span:nth-child(2) {
    top: 10px;
}

.mobile-nav-toggle span:nth-child(3) {
    top: 20px;
}

.mobile-nav-toggle.active span:nth-child(1) {
    top: 10px;
    transform: rotate(135deg);
}

.mobile-nav-toggle.active span:nth-child(2) {
    opacity: 0;
    left: -30px;
}

.mobile-nav-toggle.active span:nth-child(3) {
    top: 10px;
    transform: rotate(-135deg);
}

/* Hero section */
.hero-section {
    padding: var(--spacing-xl) 0;
    background-color: var(--white);
    text-align: center;
}

.hero-content {
    max-width: 700px;
    margin: 0 auto;
}

.hero-content h2 {
    font-size: 2.5rem;
    margin-bottom: var(--spacing-md);
    background: linear-gradient(135deg, #4a90e2, #86b7e8);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    color: transparent;
    display: inline-block;
}

.hero-content p {
    font-size: 1.25rem;
    margin-bottom: var(--spacing-lg);
    color: var(--text-color);
}

/* Game section */
.game-section {
    padding: var(--spacing-xl) 0;
    background-color: var(--white);
}

.game-section h2 {
    text-align: center;
    margin-bottom: var(--spacing-lg);
}

.game-controls {
    position: absolute;
    top: 10px;
    right: 10px;
    z-index: 10;
    display: flex;
    gap: var(--spacing-sm);
}

.fullscreen-button {
    background-color: rgba(0, 0, 0, 0.5);
    color: var(--white);
    border: none;
    border-radius: var(--border-radius-sm);
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: background-color var(--transition-fast);
    padding: 6px;
    z-index: 1000;
}

.fullscreen-button:hover {
    background-color: rgba(0, 0, 0, 0.7);
}

.fullscreen-button svg {
    width: 24px;
    height: 24px;
    fill: var(--white);
}

.exit-fullscreen-icon {
    display: none;
}

.is-fullscreen .fullscreen-icon {
    display: none;
}

.is-fullscreen .exit-fullscreen-icon {
    display: block;
}

.game-container {
    position: relative;
    max-width: 900px;
    margin: 0 auto;
    background-color: var(--background-light);
    border-radius: var(--border-radius-md);
    overflow: hidden;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
}

.game-container.fullscreen {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    max-width: 100%;
    z-index: 9999;
    border-radius: 0;
}

.game-frame {
    width: 100%;
    height: 560px;
    border: none;
    display: block;
}

#game-iframe {
    border: none;
    display: block;
    width: 100%;
    height: 100%;
}

/* About section */
.about-section {
    padding: var(--spacing-xl) 0;
    background-color: var(--background-light);
}

.about-section h2 {
    text-align: center;
    margin-bottom: var(--spacing-lg);
}

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

.about-text p {
    font-size: 1.1rem;
}

/* Features section */
.features-section {
    padding: var(--spacing-xl) 0;
    background-color: var(--white);
}

.features-section h2 {
    text-align: center;
    margin-bottom: var(--spacing-lg);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: var(--spacing-lg);
}

.feature-card {
    background-color: var(--background-light);
    border-radius: var(--border-radius-md);
    padding: var(--spacing-lg);
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.05);
    transition: transform var(--transition-medium);
}

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

.feature-icon {
    font-size: 2.5rem;
    margin-bottom: var(--spacing-md);
}

.feature-card h3 {
    font-size: 1.2rem;
    margin-bottom: var(--spacing-sm);
}

/* How to play section */
.howtoplay-section {
    padding: var(--spacing-xl) 0;
    background-color: var(--background-light);
}

.howtoplay-section h2 {
    text-align: center;
    margin-bottom: var(--spacing-lg);
}

.howtoplay-content {
    max-width: 800px;
    margin: 0 auto;
}

.howtoplay-step {
    display: flex;
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
    background-color: var(--white);
    padding: var(--spacing-lg);
    border-radius: var(--border-radius-md);
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.05);
}

.step-number {
    background-color: var(--primary-color);
    color: var(--white);
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    font-weight: bold;
    font-size: 1.2rem;
    flex-shrink: 0;
}

.step-content h3 {
    margin-bottom: var(--spacing-xs);
}

/* Footer styles */
.site-footer {
    padding: var(--spacing-xl) 0 var(--spacing-lg);
    background-color: var(--background-dark);
    color: var(--white);
}

.footer-content {
    display: flex;
    justify-content: space-between;
    margin-bottom: var(--spacing-lg);
}

.footer-logo h2 {
    font-size: 1.5rem;
    margin-bottom: var(--spacing-xs);
}

.footer-links ul {
    display: flex;
    gap: var(--spacing-lg);
}

.footer-links a {
    color: var(--white);
    opacity: 0.8;
    transition: opacity var(--transition-fast);
}

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

.footer-bottom {
    text-align: center;
    padding-top: var(--spacing-lg);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    font-size: 0.9rem;
    color: rgba(255, 255, 255, 0.6);
}

.footer-legal {
    text-align: center;
    margin-top: var(--spacing-md);
    margin-bottom: var(--spacing-md);
}

.footer-legal ul {
    display: flex;
    justify-content: center;
    gap: var(--spacing-lg);
}

.footer-legal a {
    color: var(--white);
    opacity: 0.8;
    font-size: 0.9rem;
    transition: opacity var(--transition-fast);
}

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

/* Loading animation */
body:not(.loaded) {
    overflow: hidden;
}

.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: var(--white);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 9999;
    transition: opacity var(--transition-medium), visibility var(--transition-medium);
}

body.loaded .loading-overlay {
    opacity: 0;
    visibility: hidden;
}

.loading-spinner {
    width: 50px;
    height: 50px;
    border: 5px solid var(--background-light);
    border-top-color: var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

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

/* Responsive styles */
@media (max-width: 992px) {
    .hero-content h2 {
        font-size: 2rem;
    }
    
    .features-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .game-frame {
        height: 500px;
    }
}

@media (max-width: 768px) {
    .mobile-nav-toggle {
        display: block;
    }

    .site-header .container {
        flex-direction: column;
        gap: var(--spacing-md);
        position: relative;
    }
    
    .main-nav {
        width: 100%;
        display: none;
    }
    
    .main-nav ul {
        flex-direction: column;
        gap: var(--spacing-md);
        padding: var(--spacing-md) 0;
    }
    
    .footer-content {
        flex-direction: column;
        gap: var(--spacing-lg);
        text-align: center;
    }
    
    .footer-links ul {
        justify-content: center;
    }
    
    .feature-card {
        text-align: center;
    }
    
    .howtoplay-step {
        flex-direction: column;
        text-align: center;
        align-items: center;
    }
    
    .game-frame {
        height: 400px;
    }
}

@media (max-width: 576px) {
    .hero-content h2 {
        font-size: 1.75rem;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
    }
    
    .main-nav ul {
        flex-wrap: wrap;
        justify-content: center;
    }
    
    .game-frame {
        height: 300px;
    }
}

/* 全屏时的样式 */
:fullscreen {
    width: 100vw;
    height: 100vh;
    padding: 0;
    margin: 0;
    border: 0;
}

:-webkit-full-screen {
    width: 100vw;
    height: 100vh;
    padding: 0;
    margin: 0;
    border: 0;
}

:-moz-full-screen {
    width: 100vw;
    height: 100vh;
    padding: 0;
    margin: 0;
    border: 0;
}

:-ms-fullscreen {
    width: 100vw;
    height: 100vh;
    padding: 0;
    margin: 0;
    border: 0;
}