:root {
    --primary-color: #6366f1;
    --primary-hover: #4f46e5;
    --success-color: #10b981;
    --warning-color: #f59e0b;
    --error-color: #ef4444;
    
    --bg-primary: #f8fafc;
    --bg-secondary: #ffffff;
    --bg-tertiary: #f1f5f9;
    
    --text-primary: #1e293b;
    --text-secondary: #64748b;
    --text-tertiary: #94a3b8;
    
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
    --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);
    
    --clay-shadow: 
        0 20px 40px -10px rgba(0, 0, 0, 0.15),
        0 0 0 1px rgba(255, 255, 255, 0.5) inset,
        0 0 20px rgba(0, 0, 0, 0.05);
    
    --glass-bg: rgba(255, 255, 255, 0.7);
    --glass-border: rgba(255, 255, 255, 0.5);
    --glass-blur: 20px;
    
    --border-radius-lg: 24px;
    --border-radius-md: 16px;
    --border-radius-sm: 12px;
    
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
}

@media (prefers-color-scheme: dark) {
    :root {
        --bg-primary: #0f172a;
        --bg-secondary: #1e293b;
        --bg-tertiary: #334155;
        
        --text-primary: #f1f5f9;
        --text-secondary: #cbd5e1;
        --text-tertiary: #94a3b8;
        
        --clay-shadow: 
            0 20px 40px -10px rgba(0, 0, 0, 0.4),
            0 0 0 1px rgba(255, 255, 255, 0.1) inset,
            0 0 20px rgba(0, 0, 0, 0.2);
        
        --glass-bg: rgba(30, 41, 59, 0.8);
        --glass-border: rgba(255, 255, 255, 0.1);
    }
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Helvetica Neue', 'PingFang SC', 'Microsoft YaHei', '微软雅黑', Arial, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    text-rendering: optimizeLegibility;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

.header {
    background: var(--glass-bg);
    backdrop-filter: blur(var(--glass-blur)) saturate(180%);
    -webkit-backdrop-filter: blur(var(--glass-blur)) saturate(180%);
    border-bottom: 1px solid var(--glass-border);
    position: sticky;
    top: 0;
    z-index: 100;
    padding: 20px 0;
}

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

.logo {
    font-size: 24px;
    font-weight: 700;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-hover));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    color: var(--primary-color);
}

.nav {
    display: flex;
    gap: 32px;
}

.nav-link {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    transition: color var(--transition-fast);
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary-color);
    transition: width var(--transition-normal);
}

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

.nav-link:hover::after {
    width: 100%;
}

.main {
    padding: 60px 0;
}

.section {
    margin-bottom: 80px;
}

.section-title {
    font-size: 32px;
    font-weight: 700;
    margin-bottom: 40px;
    color: var(--text-primary);
}

.cards-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 32px;
}

.card {
    background: var(--glass-bg);
    backdrop-filter: blur(var(--glass-blur)) saturate(180%);
    -webkit-backdrop-filter: blur(var(--glass-blur)) saturate(180%);
    border: 1px solid var(--glass-border);
    border-radius: var(--border-radius-lg);
    padding: 32px;
    box-shadow: var(--clay-shadow);
    transition: all var(--transition-normal);
    position: relative;
    overflow: hidden;
}

.card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, 
        transparent, 
        rgba(255, 255, 255, 0.5), 
        transparent);
}

.card:hover {
    transform: translateY(-8px);
    box-shadow: 
        0 30px 60px -12px rgba(0, 0, 0, 0.2),
        0 0 0 1px rgba(255, 255, 255, 0.6) inset,
        0 0 30px rgba(99, 102, 241, 0.1);
}

.card-icon {
    font-size: 48px;
    margin-bottom: 20px;
}

.card-title {
    font-size: 24px;
    font-weight: 600;
    margin-bottom: 16px;
    color: var(--text-primary);
}

.card-content {
}

.asset-name,
.tool-version {
    font-size: 18px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 8px;
}

.asset-date,
.asset-info,
.tool-size,
.tool-support {
    font-size: 14px;
    color: var(--text-secondary);
    margin-bottom: 12px;
}

.status-badge {
    display: inline-block;
    padding: 6px 16px;
    border-radius: var(--border-radius-sm);
    font-size: 14px;
    font-weight: 600;
    margin-top: 8px;
}

.status-normal {
    background: rgba(16, 185, 129, 0.15);
    color: var(--success-color);
}

.status-warning {
    background: rgba(245, 158, 11, 0.15);
    color: var(--warning-color);
}

.status-error {
    background: rgba(239, 68, 68, 0.15);
    color: var(--error-color);
}

.download-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 100%;
    padding: 14px 24px;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-hover));
    color: white;
    text-decoration: none;
    border-radius: var(--border-radius-md);
    font-weight: 600;
    font-size: 16px;
    margin-top: 20px;
    box-shadow: 
        0 4px 14px 0 rgba(99, 102, 241, 0.39),
        0 0 0 1px rgba(255, 255, 255, 0.2) inset;
    transition: all var(--transition-normal);
}

.download-btn:hover {
    transform: scale(1.02);
    box-shadow: 
        0 6px 20px 0 rgba(99, 102, 241, 0.5),
        0 0 0 1px rgba(255, 255, 255, 0.3) inset;
}

.download-btn:active {
    transform: scale(0.98);
}

.download-btn.disabled {
    background: var(--bg-tertiary);
    color: var(--text-tertiary);
    cursor: not-allowed;
    box-shadow: none;
}

.download-btn.disabled:hover {
    transform: none;
}

.footer {
    background: var(--glass-bg);
    backdrop-filter: blur(var(--glass-blur));
    -webkit-backdrop-filter: blur(var(--glass-blur));
    border-top: 1px solid var(--glass-border);
    padding: 32px 0;
    text-align: center;
    color: var(--text-secondary);
}

@media (max-width: 768px) {
    .header .container {
        flex-direction: column;
        gap: 16px;
    }
    
    .nav {
        gap: 24px;
    }
    
    .section-title {
        font-size: 28px;
    }
    
    .cards-grid {
        grid-template-columns: 1fr;
    }
    
    .card {
        padding: 24px;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 16px;
    }
    
    .logo {
        font-size: 20px;
    }
    
    .nav {
        gap: 16px;
        font-size: 14px;
    }
    
    .section-title {
        font-size: 24px;
    }
    
    .card-icon {
        font-size: 40px;
    }
    
    .card-title {
        font-size: 20px;
    }
}

@media (min-width: 1200px) {
    .cards-grid {
        grid-template-columns: repeat(4, 1fr);
    }
}

@media (min-width: 992px) and (max-width: 1199px) {
    .cards-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

@media (min-width: 768px) and (max-width: 991px) {
    .cards-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (min-width: 1200px) {
    .card {
        min-height: 280px;
    }
}

@media (hover: none) {
    .card:hover {
        transform: none;
    }
    
    .download-btn:hover {
        transform: none;
    }
}

@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}