:root{--bg:#f2f5f2;--paper:#fffefa;--ink:#203136;--muted:#68777a;--line:#d7dfdb;--accent:#216f76;--deep:#123f47;--gold:#b7792d;--green:#3f835b;--red:#a14f45;--shadow:0 18px 45px rgba(28,55,58,.08)}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--bg);color:var(--ink);font:16px/1.7 "Microsoft YaHei","PingFang SC",system-ui,sans-serif}.wrap{width:min(1100px,calc(100% - 40px));margin:auto}a{color:inherit}.puzzle-header{display:flex;min-height:70px;align-items:center;justify-content:space-between;gap:16px;border-bottom:1px solid var(--line)}.puzzle-brand,.puzzle-back{display:inline-flex;align-items:center;gap:9px;color:var(--muted);font-size:.86rem;font-weight:800;text-decoration:none}.puzzle-brand b{display:grid;place-items:center;width:30px;height:30px;border-radius:9px;background:var(--deep);color:#fff;font:800 1rem Georgia,serif}.puzzle-brand:hover,.puzzle-back:hover{color:var(--accent)}.puzzle-shell{padding:58px 0 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