:root{--text-color: #111;--bg-color: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);--muted-color: #666;--accent-color: #007AFF;--accent-light: #E3F2FD;--border-color: #e0e0e0;--shadow-light: 0 2px 8px rgba(0, 0, 0, .04);--shadow-medium: 0 4px 16px rgba(0, 0, 0, .08);--gradient-primary: linear-gradient(135deg, #667eea 0%, #764ba2 100%);--gradient-secondary: linear-gradient(135deg, #f093fb 0%, #f5576c 100%)}*{box-sizing:border-box;margin:0;padding:0}html{scroll-behavior:smooth}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Inter,Helvetica,Arial,sans-serif;background:linear-gradient(-45deg,#f5f7fa,#c3cfe2,#e0c3fc,#8ec5fc);background-size:400% 400%;animation:gradientShift 20s ease infinite;color:var(--text-color);line-height:1.5;min-height:100vh;display:flex;flex-direction:column;overflow-x:hidden}@keyframes gradientShift{0%{background-position:0% 50%}50%{background-position:100% 50%}to{background-position:0% 50%}}.fade-in{animation:fadeInUp .8s ease-out 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