/* 基础变量设置 */
:root {
    /* 颜色方案 */
    --color-primary: #3498db;
    --color-secondary: #e74c3c;
    --color-dark-bg: #121212;
    --color-card-bg: #1e1e1e;
    --color-text: #ffffff;
    --color-text-muted: rgba(255, 255, 255, 0.7);
    --color-btn-blue: #2980b9;
    --color-btn-red: #c0392b;
    
    /* 字体大小 */
    --font-size-base: 1.05rem;
    --font-size-h1: 2.3rem;
    --font-size-h2: 2rem;
    --font-size-h3: 1.6rem;
    
    /* 间距 */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-xxl: 3rem;
    
    /* 边框圆角 */
    --border-radius-sm: 4px;
    --border-radius-md: 8px;
    --border-radius-lg: 16px;
    
    /* 过渡效果 */
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
    
    /* 阴影 */
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 8px rgba(0, 0, 0, 0.2);
    --shadow-lg: 0 8px 16px rgba(0, 0, 0, 0.3);
    
    /* 渐变 */
    --gradient-primary: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
    --gradient-dark: linear-gradient(to bottom, var(--color-dark-bg), var(--color-card-bg));
}

/* 重置样式 */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Poppins', sans-serif;
    font-size: var(--font-size-base);
    line-height: 1.6;
    color: var(--color-text);
    background-color: var(--color-dark-bg);
    overflow-x: hidden;
}

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

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

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

ul {
    list-style: none;
}

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

/* 按钮样式 */
.btn {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    border-radius: var(--border-radius-sm);
    font-weight: 500;
    text-align: center;
    cursor: pointer;
    transition: all var(--transition-fast);
    border: 2px solid transparent;
}

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

.btn-primary:hover {
    background-color: transparent;
    color: white;
}

.btn-success {
    background-color: var(--color-btn-red);
    color: white;
    border-color: white;
}

.btn-success:hover {
    background-color: transparent;
    color: white;
}

.btn-lg {
    padding: 1rem 2rem;
    font-size: 1.1rem;
}

/* 头部样式 */
header {
    padding: 0;
    position: sticky;
    top: 0;
    z-index: 100;
    background-color: rgba(10, 10, 10, 0.95);
    box-shadow: var(--shadow-md);
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 80px;
}

.logo img {
    height: 80px;
    width: auto;
}

.auth-buttons {
    display: flex;
    gap: var(--spacing-sm);
}

/* 英雄区域 */
.hero {
    padding: var(--spacing-xxl) 0;
    background: var(--gradient-dark);
}

.hero-content {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xl);
}

.hero-text {
    flex: 1;
    animation: fadeIn 1s ease-in-out;
}

.hero-text h1 {
    font-size: var(--font-size-h1);
    margin-bottom: var(--spacing-md);
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    display: inline-block;
}

.hero-text p {
    margin-bottom: var(--spacing-lg);
    color: var(--color-text-muted);
}

.hero-image {
    flex: 1;
    border-radius: var(--border-radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-lg);
    transition: transform var(--transition-normal);
    animation: fadeIn 1s ease-in-out 0.3s both;
}

.hero-image:hover {
    transform: translateY(-5px);
}

.hero-image img {
    width: 100%;
    height: auto;
    transition: transform var(--transition-slow);
}

.hero-image:hover img {
    transform: scale(1.05);
}

/* CTA横幅 */
.cta-banner {
    padding: var(--spacing-lg) 0;
    background: var(--gradient-primary);
    text-align: center;
}

.cta-banner h2 {
    font-size: var(--font-size-h2);
    margin-bottom: var(--spacing-md);
}

.cta-center {
    text-align: center;
    margin-top: var(--spacing-lg);
}

/* 特点区域 */
.features {
    padding: var(--spacing-xxl) 0;
    background-color: var(--color-dark-bg);
}

.section-title {
    font-size: var(--font-size-h2);
    text-align: center;
    margin-bottom: var(--spacing-xl);
    position: relative;
    display: inline-block;
    left: 50%;
    transform: translateX(-50%);
    animation: fadeIn 1s ease-in-out;
}

.section-title::after {
    content: '';
    display: block;
    width: 80px;
    height: 4px;
    background: var(--gradient-primary);
    margin: var(--spacing-sm) auto 0;
    border-radius: 2px;
}

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

.feature-card {
    background-color: var(--color-card-bg);
    border-radius: var(--border-radius-md);
    padding: var(--spacing-lg);
    text-align: center;
    box-shadow: var(--shadow-md);
    transition: transform var(--transition-normal), box-shadow var(--transition-normal);
    height: 100%;
    display: flex;
    flex-direction: column;
    justify-content: flex-start;
    align-items: center;
}

.feature-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-lg);
}

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

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

.feature-card p {
    color: var(--color-text-muted);
    flex-grow: 1;
}

/* 游戏区域 */
.games {
    padding: var(--spacing-xxl) 0;
    background-color: var(--color-card-bg);
}

.section-description {
    text-align: center;
    color: var(--color-text-muted);
    margin-bottom: var(--spacing-xl);
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

.games-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
}

.game-card {
    background-color: var(--color-dark-bg);
    border-radius: var(--border-radius-md);
    overflow: hidden;
    box-shadow: var(--shadow-md);
    transition: transform var(--transition-normal);
}

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

.game-image {
    overflow: hidden;
}

.game-image img {
    width: 100%;
    height: auto;
    transition: transform var(--transition-normal);
}

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

.game-card h3 {
    padding: var(--spacing-md);
    text-align: center;
    font-size: var(--font-size-h3);
}

/* 用户评价区域 */
.testimonials {
    padding: var(--spacing-xxl) 0;
    background-color: var(--color-dark-bg);
}

.testimonials-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-lg);
}

.testimonial-card {
    background-color: var(--color-card-bg);
    border-radius: var(--border-radius-md);
    padding: var(--spacing-lg);
    box-shadow: var(--shadow-md);
    transition: transform var(--transition-normal);
}

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

.testimonial-rating {
    color: gold;
    font-size: 1.2rem;
    margin-bottom: var(--spacing-sm);
}

.testimonial-text {
    color: var(--color-text);
    font-style: italic;
    margin-bottom: var(--spacing-md);
}

.testimonial-author {
    color: var(--color-text-muted);
    text-align: right;
}

/* 快速访问区域 */
.access {
    padding: var(--spacing-xl) 0;
    background-color: var(--color-card-bg);
}

.access-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-lg);
    text-align: center;
}

.access-logo img {
    width: 100px;
    height: auto;
}

.access-buttons h3 {
    font-size: var(--font-size-h3);
    margin-bottom: var(--spacing-md);
}

.buttons-group {
    display: flex;
    gap: var(--spacing-md);
    justify-content: center;
}

/* 页脚 */
footer {
    padding: var(--spacing-xl) 0;
    background-color: var(--color-dark-bg);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-links {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
}

.footer-link {
    color: var(--color-text-muted);
    transition: color var(--transition-fast);
}

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

.copyright {
    text-align: center;
    color: var(--color-text-muted);
    font-size: 0.9rem;
}

/* 政策页面 */
.policy-section {
    padding: var(--spacing-xxl) 0;
    background-color: var(--color-dark-bg);
    display: none;
}

.policy-section:target {
    display: block;
}

.policy-section h2 {
    font-size: var(--font-size-h2);
    margin-bottom: var(--spacing-lg);
}

.policy-section p {
    margin-bottom: var(--spacing-md);
    color: var(--color-text-muted);
}

/* 回到顶部按钮 */
.back-to-top {
    position: fixed;
    bottom: 20px;
    right: 20px;
    width: 40px;
    height: 40px;
    background-color: var(--color-primary);
    color: white;
    border-radius: 50%;
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 1.5rem;
    box-shadow: var(--shadow-md);
    opacity: 0.8;
    transition: opacity var(--transition-fast), transform var(--transition-fast);
}

.back-to-top:hover {
    opacity: 1;
    transform: translateY(-3px);
}

/* 脉冲动画 */
.pulse {
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.05);
    }
    100% {
        transform: scale(1);
    }
}

/* 淡入动画 */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* 动画延迟 */
.feature-card:nth-child(1) {
    animation: fadeIn 0.5s ease-in-out 0.1s both;
}

.feature-card:nth-child(2) {
    animation: fadeIn 0.5s ease-in-out 0.2s both;
}

.feature-card:nth-child(3) {
    animation: fadeIn 0.5s ease-in-out 0.3s both;
}

.feature-card:nth-child(4) {
    animation: fadeIn 0.5s ease-in-out 0.4s both;
}

/* 响应式设计 */
@media (min-width: 768px) {
    .hero-content {
        flex-direction: row;
    }
    
    .auth-buttons {
        gap: var(--spacing-md);
    }
}

@media (max-width: 767px) {
    :root {
        --font-size-h1: 1.8rem;
        --font-size-h2: 1.6rem;
        --font-size-h3: 1.4rem;
    }
    
    .hero-text, .hero-image {
        width: 100%;
    }
    
    .auth-buttons {
        gap: var(--spacing-xs);
    }
    
    .header-content {
        height: 70px;
    }
    
    .logo img {
        height: 60px;
    }
    
    .btn {
        padding: 0.6rem 1.2rem;
    }
}

@media (max-width: 480px) {
    :root {
        --font-size-base: 1rem;
        --font-size-h1: 1.6rem;
        --font-size-h2: 1.4rem;
        --font-size-h3: 1.2rem;
    }
    
    .container {
        padding: 0 var(--spacing-sm);
    }
    
    .features-grid,
    .games-grid,
    .testimonials-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-links {
        flex-direction: column;
        gap: var(--spacing-md);
        align-items: center;
    }
    
    .buttons-group {
        flex-direction: column;
        gap: var(--spacing-sm);
    }
}