:root {
    --primary-gradient: linear-gradient(135deg, #4338ca 0%, #1e40af 100%);
    --secondary-gradient: linear-gradient(135deg, #3b82f6 0%, #2563eb 100%);
    --accent-gradient: linear-gradient(135deg, #6366f1 0%, #4f46e5 100%);
    --success-gradient: linear-gradient(135deg, #059669 0%, #10b981 100%);
    --warning-gradient: linear-gradient(135deg, #d97706 0%, #f59e0b 100%);
    --danger-gradient: linear-gradient(135deg, #dc2626 0%, #ef4444 100%);

    --bg-page: #f0f4f8;
    --bg-card: #ffffff;
    --bg-card-hover: #f1f5f9;
    --text-primary: #0f172a;
    --text-secondary: #334155;
    --text-muted: #64748b;
    --border-light: rgba(226, 232, 240, 0.8);

    --accent-blue: #2563eb;
    --accent-indigo: #4f46e5;
    --accent-green: #10b981;
    --accent-orange: #f59e0b;
    --accent-red: #ef4444;
    --accent-purple: #8b5cf6;

    --spacing-xs: 0.5rem; --spacing-sm: 1rem; --spacing-md: 1.5rem;
    --spacing-lg: 2rem; --spacing-xl: 3rem; --spacing-xxl: 4rem;

    --radius-sm: 8px; --radius-md: 12px; --radius-lg: 16px; --radius-xl: 24px;

    --shadow-sm: 0 2px 4px rgba(0,0,0,0.04);
    --shadow-md: 0 4px 20px -5px rgba(0,0,0,0.07), 0 2px 10px -2px rgba(0,0,0,0.04);
    --shadow-lg: 0 10px 25px -5px rgba(0,0,0,0.1), 0 8px 10px -6px rgba(0,0,0,0.05);

    --transition-fast: 0.2s ease; --transition-normal: 0.3s ease; --transition-slow: 0.5s ease;
}

*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    -webkit-tap-highlight-color: transparent;
}

body {
    font-family: 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', 'Noto Sans SC', 'Poppins', -apple-system, BlinkMacSystemFont, sans-serif;
    background: #f0f4f8;
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
    min-height: 100vh;
}

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

@media (max-width: 480px) {
    .container {
        padding: 0 12px;
    }
}

/* Animations */
@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes slideIn {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

@keyframes fadeInDown {
    from { opacity: 0; transform: translateY(-20px); }
    to { opacity: 1; transform: translateY(0); }
}

@keyframes flash {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.3; }
}

@keyframes pulse-badge {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.6; }
}