:root { --text: #111827; --muted: #6b7280; --bg: #ffffff; --accent: #0ea5e9; --rule: #e5e7eb; --maxw: 860px; } * { box-sizing: border-box; } body { margin: 0; font-family: system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, "Apple Color Emoji","Segoe UI Emoji"; line-height: 1.6; color: var(--text); background: var(--bg); } .container {...
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