/* 全局样式 */
:root {
    --primary-color: #8B5CF6;
    --primary-dark: #6D28D9;
    --text-primary: #FFFFFF;
    --text-secondary: rgba(255, 255, 255, 0.7);
    --gradient: linear-gradient(135deg, #1E1B4B, #312E81);
    --card-bg: rgba(255, 255, 255, 0.05);
    --transition: all 0.3s ease;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    line-height: 1.6;
    color: var(--text-primary);
    background: var(--gradient);
    min-height: 100vh;
    position: relative;
}

body::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: 
        radial-gradient(circle at 20% 20%, rgba(139, 92, 246, 0.15) 0%, transparent 50%),
        radial-gradient(circle at 80% 80%, rgba(139, 92, 246, 0.15) 0%, transparent 50%);
    pointer-events: none;
}

/* 主要内容区域 */
main {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem;
    position: relative;
}

/* Hero区域 */
.hero {
    text-align: center;
    padding: 6rem 0 4rem;
    color: var(--text-primary);
}

.hero h1 {
    font-size: 4rem;
    margin-bottom: 1rem;
    font-weight: 800;
    background: linear-gradient(to right, #fff, #8B5CF6);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    text-shadow: 0 0 30px rgba(139, 92, 246, 0.3);
}

.hero .subtitle {
    font-size: 1.5rem;
    margin-bottom: 2.5rem;
    color: var(--text-secondary);
}

/* 下载按钮 */
.download-btn {
    display: inline-block;
    padding: 1rem 2.5rem;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    color: white;
    text-decoration: none;
    border-radius: 30px;
    font-weight: 600;
    transition: var(--transition);
    box-shadow: 0 4px 20px rgba(139, 92, 246, 0.3);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.download-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 25px rgba(139, 92, 246, 0.4);
    background: linear-gradient(135deg, var(--primary-dark), var(--primary-color));
}

.download-btn.large {
    padding: 1.2rem 3rem;
    font-size: 1.2rem;
}

/* 特性区域 */
.features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
    margin: 6rem 0;
}

.feature-card {
    background: var(--card-bg);
    backdrop-filter: blur(10px);
    padding: 2.5rem;
    border-radius: 24px;
    text-align: center;
    color: var(--text-primary);
    transition: var(--transition);
    opacity: 0;
    animation: fadeInUp 0.6s forwards;
    border: 1px solid rgba(255, 255, 255, 0.05);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
}

.feature-card:hover {
    transform: translateY(-5px);
    border-color: rgba(139, 92, 246, 0.2);
    box-shadow: 0 8px 32px rgba(139, 92, 246, 0.2);
}

.feature-card .icon {
    font-size: 3rem;
    margin-bottom: 1.5rem;
    display: block;
    text-shadow: 0 0 20px rgba(255, 255, 255, 0.3);
}

.feature-card h3 {
    font-size: 1.5rem;
    margin-bottom: 0.8rem;
    color: var(--text-primary);
}

.feature-card p {
    color: var(--text-secondary);
}

/* 下载区域 */
.download-section {
    margin: 6rem 0;
}

.download-card {
    background: rgba(255, 255, 255, 0.02);
    padding: 3.5rem;
    border-radius: 24px;
    text-align: center;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.05);
    backdrop-filter: blur(10px);
}

.download-card h2 {
    font-size: 2.2rem;
    margin-bottom: 1rem;
    color: var(--text-primary);
    background: linear-gradient(to right, #fff, #8B5CF6);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.system-req {
    color: var(--text-secondary);
    margin-bottom: 2.5rem;
}

.version-info {
    margin-top: 1.5rem;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

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

/* 响应式设计 */
@media (max-width: 768px) {
    .hero h1 {
        font-size: 2.8rem;
    }
    
    .hero .subtitle {
        font-size: 1.2rem;
    }
    
    .download-card {
        padding: 2rem;
    }
    
    main {
        padding: 1rem;
    }
}