:root{--grad-bg:linear-gradient(135deg, #e0fff4 0%, #e5f4ff 55%, #eef6ff 100%);--grad-accent:linear-gradient(120deg, #10b981, #14b8a6, #3b82f6);--bg:#eef6ff;--card:rgba(255, 255, 255, 0.75);--avatar-bg:#ffffff;--ink:#2d2a3e;--ink-soft:#6f6a85;--ink-faint:#a8a3bd;--border:rgba(255, 255, 255, 0.9);--shadow:0 8px 30px rgba(20, 184, 166, 0.12);--shadow-hover:0 14px 40px rgba(59, 130, 246, 0.18);--link:#0d9488;--radius:20px}[data-theme=dark]{--grad-bg:linear-gradient(135deg, #0b1220 0%, #0e1a2b 55%, #10233a 100%);--card:rgba(255, 255, 255, 0.06);--avatar-bg:#16233a;--ink:#e8ecf4;--ink-soft:#aab3c5;--ink-faint:#6b7288;--border:rgba(255, 255, 255, 0.12);--shadow:0 8px 30px rgba(0, 0, 0, 0.35);--shadow-hover:0 14px 40px rgba(20, 184, 166, 0.25);--link:#5eead4}*{margin:0;padding:0;box-sizing:border-box}html{scroll-behavior:smooth}body::before{content:"";position:fixed;inset:0;z-index:-1;background:var(--grad-bg)}body{color:var(--ink);font-family:-apple-system,BlinkMacSystemFont,segoe 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