:root{--bg:#f6f4ef;--bg-2:#ebe7dc;--surface:#fffdfa;--surface-2:#f8f5ee;--surface-3:#f0ece2;--ink:#101d1d;--text:#20302f;--muted:#68726f;--line:#ded7ca;--line-strong:#cfc5b5;--green:#163f3a;--green-2:#245a51;--green-soft:#e6efeb;--blue:#244f68;--blue-soft:#e5eef3;--gold:#9b681b;--gold-soft:#f2e6d1;--slate:#647977;--slate-soft:#e9eeeb;--clay:#8f604c;--shadow-soft:0 14px 36px rgba(52,44,31,0.08);--shadow-card:0 10px 26px rgba(35,31,24,0.075)}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;color:var(--text);background:var(--bg);font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Microsoft YaHei,system-ui,sans-serif;letter-spacing:0}button,input,select,textarea{font:inherit}button{cursor:pointer}button:disabled{cursor:not-allowed;opacity:.58}input,select,textarea{color:var(--text)}.pen-workbench{min-height:100vh;display:grid;grid-template-columns:86px minmax(0,1fr);background:radial-gradient(circle at 58% 12%,rgba(255,255,255,.9),rgba(255,255,255,0) 30%),linear-gradient(180deg,#faf8f3 0,var(--bg) 54%,#f0ece4 100%)}.icon-rail{position:-webkit-sticky;position:sticky;top:0;height:100vh;border-right:1px solid var(--line);background:rgba(255,253,250,.78);-webkit-backdrop-filter:blur(18px);backdrop-filter:blur(18px);display:flex;flex-direction:column;align-items:center;padding:28px 10px 22px;gap:26px;z-index:4}.rail-brand{width:42px;height:42px;display:grid;place-items:center;border-radius:8px;color:#fffdf8;background:linear-gradient(145deg,var(--green),#0b2927);box-shadow:0 8px 18px rgba(22,63,58,.18);font-size:24px;font-weight:780}.rail-nav{width:100%;display:grid;grid-gap:10px;gap:10px;justify-items:center}.rail-button{width:62px;min-height:64px;border:1px solid transparent;border-radius:8px;display:grid;place-items:center;grid-gap:6px;gap:6px;color:#263837;background:transparent}.rail-button 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12px;font-size:13px;white-space:nowrap}.status-chip{min-height:30px;background:var(--surface-2);color:var(--muted);border-radius:999px;padding:0 11px}.status-chip.ok{color:var(--green);background:var(--green-soft);border-color:#cfe0d9}.dot{width:7px;height:7px;border-radius:99px;display:inline-block}.dot.amber{background:#b98423}.dot.green{background:#2c7b56}.dot.blue{background:#2e6882}.hero-workbench{max-width:900px;margin:46px auto 30px;text-align:center}.hero-workbench h1{margin:0;color:var(--ink);font-size:clamp(32px,4vw,52px);line-height:1.15;font-weight:820}.hero-workbench p{margin:18px 0 0;color:#5b6866;font-size:20px;line-height:1.5;font-weight:520}.tool-grid{max-width:1180px;margin:0 auto;display:grid;grid-template-columns:repeat(2,minmax(320px,1fr));grid-gap:14px 24px;gap:14px 24px}.tool-card{position:relative;min-height:126px;display:grid;grid-template-columns:84px minmax(0,1fr) 32px;align-items:center;grid-gap:24px;gap:24px;border:1px solid var(--line);border-radius:8px;background:rgba(255,253,250,.9);box-shadow:var(--shadow-card);padding:22px 28px;text-align:left;transition:transform .16s ease,border-color .16s ease,box-shadow .16s ease,background .16s ease}.tool-card.selected,.tool-card:hover{transform:translateY(-2px);border-color:rgba(22,63,58,.36);background:#fffefb;box-shadow:0 16px 34px rgba(37,33,25,.11)}.tool-card.selected:before{content:"";position:absolute;inset:12px auto 12px 0;width:4px;border-radius:0 4px 4px 0;background:var(--green)}.tool-icon{width:72px;height:72px;display:inline-grid;place-items:center;border:1px solid var(--line);border-radius:8px;background:var(--surface-2)}.tool-icon.small{width:44px;height:44px}.tool-icon.green{color:var(--green);background:var(--green-soft);border-color:#ceded8}.tool-icon.blue{color:var(--blue);background:var(--blue-soft);border-color:#cbdde7}.tool-icon.gold{color:var(--gold);background:var(--gold-soft);border-color:#e3cfaa}.tool-icon.slate{color:#536b69;background:var(--slate-soft);border-color:#d5ddda}.tool-copy{min-width:0;display:grid;grid-gap:8px;gap:8px}.tool-copy strong{color:var(--ink);font-size:23px;line-height:1.2}.tool-copy span{color:#5f6966;font-size:15px;line-height:1.45}.tool-copy em{color:var(--green);font-size:13px;font-style:normal;font-weight:680}.tool-arrow{color:#40504d;justify-self:end}.recent-panel{max-width:1180px;margin:18px auto 0;border:1px solid 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