:root{color-scheme:light;--ink:#253039;--muted:#677278;--line:#dbe0de;--paper:#f3f4f2;--blue:#35566c;--green:#42765e}
*{box-sizing:border-box}body{margin:0;background:var(--paper);color:var(--ink);font:15px/1.7 -apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft Yahei",sans-serif}a{color:inherit;text-underline-offset:4px}main{max-width:1220px;margin:auto;padding:30px 38px 35px}header{display:flex;justify-content:space-between;align-items:center;border-bottom:1px solid var(--line);padding-bottom:22px}.brand{font-weight:650;font-size:13px;letter-spacing:.08em;text-decoration:none}.brand span{font-size:11px;color:var(--muted);margin-left:8px}nav{display:flex;gap:17px;font-size:13px}nav a[aria-current]{font-weight:700;text-decoration-thickness:2px}.intro{padding:28px 0 22px}.eyebrow{font-size:11px;color:var(--muted);letter-spacing:.12em;margin:0 0 10px}h1{font:500 clamp(25px,3.4vw,40px)/1.35 Georgia,"Songti SC","STSong",serif;letter-spacing:-.02em;margin:0 0 12px}.intro>p:last-child{color:var(--muted);margin:0;max-width:850px}.diagram{border:1px solid var(--line);background:#fff}.stage{position:relative;width:100%;aspect-ratio:2.15;min-height:0;overflow:hidden}canvas{display:block;width:100%;height:100%}#labels{position:absolute;inset:0;pointer-events:none}.node-label{position:absolute;transform:translate(-50%,-50%);text-align:center;white-space:nowrap;font-weight:650;font-size:16px}.node-label small{display:block;font-size:11px;line-height:1.5;color:var(--muted);font-weight:400;margin-top:3px}.edge-label{position:absolute;transform:translate(-50%,-50%);font-size:12px;line-height:1.35;background:rgba(255,255,255,.94);padding:4px 7px;color:var(--blue);white-space:nowrap;border-radius:3px}.edge-label.back{color:var(--green)}.edge-label b{font-size:11px;margin-right:6px}.edge-label.active{outline:1px solid currentColor;font-weight:650}.edge-label.dim{opacity:.52}.caption{display:flex;justify-content:space-between;gap:10px;padding:10px 17px;border-top:1px solid #eef0ee;font-size:11px;color:var(--muted)}#loading{position:absolute;inset:0;margin:0;display:grid;place-items:center;background:#fff}.controls{display:grid;grid-template-columns:auto 1fr;gap:24px;align-items:start;padding:22px 0}.buttons{display:flex;gap:7px;flex-wrap:wrap}button{font:inherit;color:var(--ink);background:#fff;border:1px solid #cbd2cf;border-radius:4px;padding:6px 12px;cursor:pointer;min-height:37px;font-size:12px}button:hover{border-color:var(--blue)}button:focus-visible{outline:2px solid var(--blue);outline-offset:3px}button[aria-pressed=true],#all[aria-pressed=true]{background:#edf2f2;border-color:var(--blue)}.current{display:flex;gap:13px;align-items:baseline;min-height:48px}.current>span{font:12px/1.7 ui-monospace,monospace;color:var(--blue);white-space:nowrap}.current p{font-size:13px;margin:0;color:var(--muted)}#steps{list-style:none;margin:0;padding:0;display:grid;grid-template-columns:repeat(4,1fr);gap:0;border:1px solid var(--line);background:#fff}#steps li{padding:15px 18px;min-width:0;border-bottom:1px solid var(--line)}#steps li:nth-last-child(-n+4){border-bottom:0}#steps li:not(:nth-child(4n)){border-right:1px solid var(--line)}#steps button{border:0;background:transparent;padding:0;min-height:auto;text-align:left;width:100%;display:flex;gap:12px;align-items:baseline;font-size:13px}#steps button span{font:12px ui-monospace,monospace;color:var(--muted)}#steps button[aria-current=step]{color:var(--blue);font-weight:700}#steps p{font-size:12px;color:var(--muted);line-height:1.7;margin:7px 0 0 28px}footer{display:flex;justify-content:space-between;gap:24px;padding-top:20px;color:var(--muted);font-size:11px}footer p{margin:0;max-width:850px}footer a{white-space:nowrap}.fallback{position:absolute;inset:0;width:100%;height:100%}
@media(max-width:1000px){main{padding:22px 16px}.brand span{display:none}.intro{padding:24px 0}.intro>p:last-child{font-size:13px}.stage{aspect-ratio:auto;height:1110px;min-height:0}.node-label{font-size:15px}.node-label{max-width:155px;white-space:normal;line-height:1.35}.node-label small{display:block;font-size:10px;max-width:150px;line-height:1.4}.edge-label{font-size:10.5px;width:102px;text-align:center;white-space:normal;padding:3px 5px}.edge-label[data-edge="render"],.edge-label[data-edge="grok-updates"]{width:90px}.caption{font-size:10px;padding:9px 11px}.controls{grid-template-columns:1fr;gap:16px;padding:18px 0}.current{min-height:55px}#steps{grid-template-columns:1fr}#steps li{border-right:0!important;border-bottom:1px solid var(--line)!important}#steps li:last-child{border-bottom:0!important}footer{display:block}footer a{display:inline-block;margin-top:12px}}