:root{color-scheme:dark;--bg:#0a111a;--panel:#101c29;--line:#273747;--text:#e9edf1;--muted:#8f9eae;--gold:#edc480;--cyan:#8de3db;--blue:#8cb9f0;font-family:Inter,"PingFang SC","Microsoft YaHei",sans-serif}
*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--text);min-height:100vh}button,a{-webkit-tap-highlight-color:transparent}button{font:inherit;cursor:pointer}button:disabled{opacity:.35;cursor:default}button:focus-visible,a:focus-visible{outline:2px solid var(--gold);outline-offset:4px}a{color:inherit;text-decoration:none}button{color:inherit}button:not(:disabled){transition:background .18s,transform .18s,border-color .18s}button:not(:disabled):active{transform:translateY(1px)}.sky{position:fixed;inset:0;z-index:-1;pointer-events:none;background:radial-gradient(ellipse at 14% 50%,#16303a55,transparent 48%),radial-gradient(ellipse at 90% 10%,#29415c44,transparent 45%),radial-gradient(circle at 23% 20%,#ffffff55 1px,transparent 1.8px),radial-gradient(circle at 73% 68%,#ffffff44 1px,transparent 1.6px);background-size:auto,auto,173px 211px,233px 181px}.topbar{max-width:1320px;margin:auto;padding:32px 48px;display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid #26323c80}.brand{display:flex;gap:14px;align-items:center;font-size:18px;letter-spacing:2px;font-weight:600}.brand small{display:block;font-size:9px;letter-spacing:3px;color:var(--muted);margin-top:6px}.brand-mark{font-size:36px;color:var(--gold);font-weight:400}.topbar nav{display:flex;gap:22px}.quiet{border:0;background:none;padding:10px 6px;font-size:12px;color:var(--muted)}.quiet:hover{color:var(--text)}main{max-width:1240px;margin:58px auto 42px;padding:0 36px;display:grid;grid-template-columns:1fr 572px;gap:68px;align-items:center}.eyebrow{font-family:ui-monospace,SFMono-Regular,monospace;letter-spacing:2px;font-size:10px;color:var(--muted);line-height:1.7;margin:0 0 20px}.live-dot{display:inline-block;width:6px;height:6px;background:var(--cyan);border-radius:50%;margin-right:7px;box-shadow:0 0 10px #8de3db80}.intro h1{font-family:"Songti SC","Noto Serif SC",serif;font-size:clamp(34px,3.6vw,48px);font-weight:500;line-height:1.55;letter-spacing:2px;margin:24px 0}.intro h1 em{font-style:normal;color:var(--gold)}.lede{color:#a9b6c1;font-size:14px;line-height:2.2;letter-spacing:1px}.intro-bottom{display:flex;gap:18px;align-items:center;margin:38px 0 42px}.orbit-icon{font-size:42px;color:#667e88;line-height:1}.intro-bottom p{font-size:12px;line-height:1.9;margin:0;color:#cad3dc}.intro-bottom p span{color:var(--muted)}.mission-list{border-top:1px solid var(--line);padding-top:23px;max-width:360px}.mission-list>.eyebrow{display:flex;justify-content:space-between;margin-bottom:15px}.levels{display:grid;grid-template-columns:repeat(6,1fr);gap:9px}.level-button{position:relative;border:1px solid #2a3a46;border-radius:9px;background:#101c2680;height:48px;font-family:ui-monospace,monospace;color:#8494a1;font-size:14px}.level-button:hover{border-color:var(--gold)}.level-button.active{background:#edc48014;border-color:#edc48080;color:var(--gold)}.level-button.done::after{content:'✦';position:absolute;font-size:8px;bottom:3px;right:5px;color:var(--gold)}.console{position:relative;background:linear-gradient(150deg,#152330ed,#0e1925f5);border:1px solid #344352;border-radius:20px;padding:27px;box-shadow:0 32px 100px #0004,inset 0 1px 0 #ffffff0c}.console-head{display:flex;justify-content:space-between;align-items:center}.console-head .eyebrow{font-size:9px;letter-spacing:2px;margin-bottom:6px}.console-head h2{font-size:19px;letter-spacing:2px;font-weight:500;margin:0}.status-pill{font-size:10px;border:1px solid #3c4b57;border-radius:20px;color:#aab9c6;padding:6px 12px}.status-pill.online{color:var(--cyan);border-color:#8de3db55}.metrics{display:grid;grid-template-columns:1.1fr 1fr 1fr;padding:21px 0 16px;border-bottom:1px solid var(--line);margin-bottom:13px}.metrics>div{padding-left:23px;border-left:1px solid var(--line)}.metrics>div:first-child{padding-left:0;border:0}.metrics span{display:block;font-size:10px;color:var(--muted);letter-spacing:1px}.metrics strong{font-size:22px;display:block;margin-top:8px;font-family:ui-monospace,monospace;font-weight:400}.metrics>div:first-child strong{color:var(--gold)}.board-frame{position:relative}.board-coordinates{display:grid;grid-template-columns:repeat(5,1fr);text-align:center;color:#69818e;font:9px ui-monospace,monospace;margin:0 0 9px;letter-spacing:2px}.board{display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:8px;padding:9px;background:#060e17b3;border:1px solid #283b4c;border-radius:12px;isolation:isolate}.cell{position:relative;aspect-ratio:1;border:1px solid #30404d;border-radius:8px;background:linear-gradient(135deg,#1c2b37,#14212c);padding:0;min-width:0;overflow:visible;touch-action:manipulation;color:#647789}.cell:not(:disabled):hover{background:#26394a;border-color:#708895}.cell svg{width:100%;height:100%;display:block;overflow:visible}.cell .rail{stroke:#08121c;stroke-width:18;fill:none;stroke-linecap:butt}.cell .signal{stroke:currentColor;stroke-width:7;fill:none;stroke-linecap:butt;transition:stroke .24s}.cell .dot{fill:#91a5b0;stroke:#14212c;stroke-width:3}.cell.lit{color:var(--cyan);border-color:#8de3db55;background:linear-gradient(135deg,#153237,#14242e)}.cell.lit .signal{filter:drop-shadow(0 0 5px #8de3db60)}.cell.lit .dot{fill:var(--cyan)}.cell.source{color:var(--gold);border-color:#edc48099;background:#302b25}.cell.target{color:var(--blue);border-color:#8cb9f099;background:#1b2b40}.cell.fixed{cursor:default}.cell .badge{position:absolute;left:50%;top:50%;transform:translate(-50%,-50%);font-size:18px;line-height:1;border-radius:5px;background:#15232d;padding:1px 3px;color:#b4a0d6}.cell.lit .badge{color:var(--cyan)}.cell.source .badge{color:var(--gold);background:#302b25}.cell.target .badge{color:var(--blue);background:#1b2b40}.cell.hinted{outline:2px solid var(--gold);outline-offset:2px;box-shadow:0 0 20px #edc48030}.legend{display:flex;align-items:center;gap:16px;font-size:9px;color:#97a8b8;margin:16px 0 13px}.legend>span{display:flex;align-items:center;gap:5px}.legend i{width:6px;height:6px;display:inline-block;border:1px solid}.legend-source{color:var(--gold);background:var(--gold);border-radius:50%}.legend-relay{color:#b4a0d6;transform:rotate(45deg)}.legend-target{color:var(--blue);border-radius:2px}.legend-hint{margin-left:auto;color:#718795}.message{font-size:11px;line-height:1.9;min-height:42px;color:#aabcc8;margin:12px 0}.toolbar{display:flex;gap:8px;align-items:center;padding-top:15px;border-top:1px solid var(--line)}.secondary{border:1px solid #344757;border-radius:7px;background:#192a37;padding:11px 15px;font-size:11px;white-space:nowrap}.secondary:hover{background:#263b4a;border-color:#708895}.share{margin-left:auto;white-space:nowrap}.primary{background:var(--gold);border:1px solid #f8d8a1;color:#22262b;border-radius:7px;font-weight:600;font-size:13px;padding:14px 22px;display:flex;align-items:center;justify-content:center;gap:30px;min-height:46px}.primary:hover{background:#f4d7a6}.welcome,.result{position:absolute;inset:25px 0 0;z-index:2;border-radius:12px;background:#0c1722ed;backdrop-filter:blur(6px);display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;padding:20px;border:1px solid #34475c}.welcome .eyebrow{margin:12px 0 4px;color:var(--gold);font-size:9px}.welcome-symbol{color:var(--gold);font-size:45px;line-height:1}.welcome h3,.result h3{font-family:"Songti SC",serif;font-size:23px;font-weight:500;letter-spacing:1px;margin:14px 0 8px}.welcome p:not(.eyebrow),.result p:not(.eyebrow){font-size:12px;color:#a8b7c6;line-height:2;margin:7px 0 23px}.welcome small{color:#6e8595;font-size:9px;margin-top:17px;letter-spacing:1px}.welcome .primary{min-width:230px}.result .eyebrow{color:var(--cyan);margin:0 0 8px}.result-stars{font-size:34px;color:var(--gold);letter-spacing:9px;margin-top:4px}.result .quiet{margin-top:12px}.result .primary{min-width:230px}footer{border-top:1px solid #26323c80;max-width:1224px;margin:0 auto;padding:20px 12px 26px;display:flex;justify-content:space-between;align-items:center;font-size:10px;letter-spacing:1px;color:#728797}footer>div{display:flex;align-items:center;gap:20px}.footer-dot{padding:0 10px}footer .quiet{font-size:10px;letter-spacing:1px}dialog{position:fixed;border:1px solid #3e5161;border-radius:16px;background:#112130;color:var(--text);max-width:490px;width:calc(100% - 32px);padding:34px;box-shadow:0 30px 100px #0008}dialog::backdrop{background:#040a11bb;backdrop-filter:blur(6px)}dialog h2{font-family:"Songti SC",serif;font-size:25px;font-weight:500;color:var(--gold);margin:10px 0 22px}dialog p{font-size:12px;line-height:2;color:#b3c2cc}dialog .primary{width:100%;margin-top:22px}dialog .close{position:absolute;right:15px;top:10px;background:none;border:0;font-size:25px;color:var(--muted);width:36px;height:36px}dialog .eyebrow{font-size:9px;margin:0}.feedback-options{display:flex;flex-wrap:wrap;gap:7px}.feedback-options button{flex:1}.privacy{font-size:10px;color:#7c92a2}#clear{margin-top:12px}#feedback-status{min-height:24px;color:var(--cyan)}[hidden]{display:none!important}
@media(min-width:1450px){main{margin-top:80px;margin-bottom:70px}.intro h1{font-size:50px}}
@media(max-width:1050px){main{gap:30px;grid-template-columns:1fr 500px;padding:0 28px}.topbar{padding:24px 30px}.intro h1{font-size:34px}.console{padding:23px}footer{margin:0 28px}.legend{gap:10px}}
@media(max-width:820px){main{grid-template-columns:1fr;max-width:600px;gap:28px;margin:30px auto;padding:0 20px}.intro>.eyebrow{font-size:8px;letter-spacing:1.5px}.intro h1{font-size:32px;line-height:1.5;margin:14px 0}.intro h1 br{display:block}.lede{font-size:12px;line-height:1.9}.lede br{display:none}.intro-bottom{display:none}.mission-list{max-width:none;margin-top:22px;padding-top:18px}.mission-list .eyebrow{font-size:9px;margin-bottom:10px}.level-button{height:44px}.console{padding:22px}.topbar{padding:20px;gap:12px}.topbar nav{gap:12px}.brand{font-size:15px;gap:9px}.brand small{font-size:7px;letter-spacing:2px}.brand-mark{font-size:28px}.quiet{font-size:10px}.metrics{padding-top:18px}footer{margin:0 20px;padding:15px 0;flex-direction:column;gap:8px;align-items:flex-start}.console-head h2{font-size:17px}.legend{gap:12px}.cell .badge{font-size:16px}.console-head .eyebrow{font-size:8px}.status-pill{font-size:9px}}
@media(max-width:420px){main{padding:0 14px}.intro h1{font-size:29px;letter-spacing:1px}.console{padding:15px;border-radius:15px}.board{gap:6px;padding:7px}.cell{border-radius:6px}.board-coordinates{font-size:8px}.metrics strong{font-size:20px}.metrics>div{padding-left:17px}.metrics span{font-size:9px}.legend{font-size:8px;gap:10px}.legend-hint{display:none!important}.toolbar{gap:6px}.toolbar .secondary{padding:11px 10px}.share{font-size:9px;padding:10px 0}.welcome,.result{padding:16px}.welcome-symbol{font-size:32px}.welcome h3,.result h3{font-size:19px}.welcome p:not(.eyebrow),.result p:not(.eyebrow){font-size:10px;margin-bottom:14px}.welcome small{margin-top:12px;font-size:8px}.welcome .primary,.result .primary{min-width:200px;padding:12px 16px;font-size:12px}.result-stars{font-size:28px}.result .eyebrow{font-size:8px}.result .quiet{margin-top:8px}.message{font-size:10px}.cell .badge{font-size:13px}.topbar nav{gap:8px}dialog{padding:25px}.brand{letter-spacing:1px}}
@media(prefers-reduced-motion:reduce){*,*::before,*::after{animation:none!important;transition:none!important;scroll-behavior:auto!important}}