@import url('https://fonts.googleapis.com/css2?family=Noto+Sans+SC:wght@400;500;600;700;800&display=swap');
:root{--bg:#f7f8f3;--ink:#172e29;--muted:#718079;--green:#27634b;--line:#dce3d9;--lime:#d9ec95}*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:95px}body{margin:0;background:var(--bg);color:var(--ink);font-family:'Noto Sans SC',sans-serif;line-height:1.8}a{color:inherit;text-decoration:none}button,input,select{font:inherit}button,a,input,select{touch-action:manipulation}button{cursor:pointer}a:hover{color:var(--green)}button:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible{outline:3px solid #70a57c;outline-offset:4px}header{max-width:1280px;margin:auto;padding:25px 40px;display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid var(--line)}.brand{font-size:22px;font-weight:800;letter-spacing:-1px}.brand span{color:#719a65}nav{display:flex;gap:30px;font-size:13px}main{max-width:1200px;margin:auto;padding:0 32px}section{padding:90px 0;border-bottom:1px solid var(--line)}.hero{display:grid;grid-template-columns:1.2fr 1fr;align-items:center;min-height:640px;gap:30px}.eyebrow{font-size:11px;font-weight:700;letter-spacing:2px;color:var(--green);margin:0 0 25px}h1{font-size:clamp(38px,5vw,66px);letter-spacing:-2px;line-height:1.35;margin:0 0 25px}h1 span,h2 span{color:var(--green)}.intro{font-size:16px;color:var(--muted);margin-bottom:34px}.button{display:inline-block;background:var(--ink);color:white;border:0;border-radius:7px;padding:13px 21px;font-size:13px;font-weight:600}.button:hover{background:var(--green);color:white}.text-link{font-size:13px;display:inline-block;margin:15px}.hero-foot{font-size:10px;letter-spacing:2px;color:var(--muted);margin-top:62px}.orbital{height:430px;position:relative;display:grid;place-items:center;background:radial-gradient(ellipse,#dce9bd88,transparent 68%)}.orbit{position:absolute;border:1px solid #a1b68a;border-radius:50%;width:330px;height:330px}.o2{height:170px;transform:rotate(40deg)}.o3{height:170px;transform:rotate(-40deg)}.core{font-family:Georgia,serif;font-size:100px;background:#e0eabf;width:145px;height:145px;line-height:125px;text-align:center;border-radius:50%;box-shadow:0 0 50px #dbe8b8}.sat{position:absolute;border:1px solid var(--line);background:var(--bg);border-radius:12px;padding:10px 20px;font-family:Georgia,serif;font-size:25px}.s1{top:45px;left:20%}.s2{right:5%;top:45%;background:var(--ink);color:var(--lime)}.s3{bottom:45px;left:20%}.orbit-caption{position:absolute;bottom:0;font-size:9px;letter-spacing:3px;color:var(--muted)}h2{font-size:clamp(26px,3vw,36px);letter-spacing:-1px;line-height:1.45;margin:0 0 20px}.section-head{display:flex;justify-content:space-between;align-items:end;gap:30px;margin-bottom:32px}.section-head p:not(.eyebrow){font-size:13px;color:var(--muted)}.map-toolbar{display:flex;justify-content:space-between;gap:20px;flex-wrap:wrap;margin-bottom:24px}.tabs{display:flex;gap:6px}.tabs button{border:0;background:transparent;color:var(--muted);padding:10px 22px;border-radius:6px}.tabs button[aria-selected=true]{background:var(--ink);color:white}.search{background:white;border:1px solid var(--line);border-radius:6px;padding:7px 14px}.search input{border:0;background:transparent;max-width:215px;outline:0;font-size:12px}.map{padding:32px;background:#eef2e7;border:1px solid var(--line);border-radius:12px}.map-root{margin:auto auto 28px;text-align:center;background:var(--green);color:white;border-radius:8px;width:210px;padding:14px;position:relative}.map-root:after{content:'';position:absolute;height:28px;border-left:1px solid #acbea3;bottom:-28px;left:50%}.branches{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}.branch{position:relative;padding:20px;background:#ffffffaa;border:1px solid var(--line);border-radius:8px}.branch h3{font-size:15px;margin:0 0 14px}.nodes{display:flex;flex-wrap:wrap;gap:8px}.node{border:1px solid #d8e1cf;background:white;border-radius:5px;padding:7px 12px;color:var(--ink);font-size:12px}.node:hover{background:var(--lime);border-color:#9aaf75}.branch p{font-size:11px;color:var(--muted);margin-bottom:0}.map-note{font-size:11px;color:var(--muted);margin-top:20px}.ai-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}.ai-card{position:relative;padding:28px;background:white;border:1px solid var(--line);border-radius:10px}.ai-icon{width:48px;height:48px;background:#e0eee3;border-radius:12px;font-size:32px;line-height:48px;text-align:center}.blue{background:#e8edff;color:#6175bd}.yellow{background:#f4edce}.tag{position:absolute;right:25px;top:40px;font-size:10px;color:var(--muted)}h3{font-size:23px;margin:20px 0 8px}.ai-card p{font-size:12px;color:var(--muted)}dl{font-size:12px;margin:24px 0}dt{font-weight:700;margin-top:17px}dd{margin:5px 0;color:var(--muted)}.light{display:block;text-align:center;background:#edf2e8;color:var(--ink)}.source{display:block;text-align:center;font-size:10px;color:var(--muted);margin-top:12px}.play-section{display:grid;grid-template-columns:1fr 1fr;align-items:center;gap:80px}.play-copy h2{font-size:48px}.play-copy>p:not(.eyebrow){max-width:370px;color:var(--muted);font-size:14px}ul{padding-left:20px;font-size:13px;line-height:2.2}.game-panel{background:#eaf0e3;border:1px solid var(--line);border-radius:14px;padding:20px}.game-stats,.game-bottom{display:flex;justify-content:space-between;align-items:center;font-size:12px;padding:0 5px 15px}.game-stats strong{font-size:22px;margin-left:8px}.game-panel button:not(.button){border:0;background:transparent;color:var(--green);font-size:12px}.canvas-wrap{position:relative;background:#fafbf6;border-radius:8px;overflow:hidden}canvas{width:100%;display:block;touch-action:none}#overlay{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;flex-direction:column;background:#f7f8f3e8;text-align:center;padding:25px}#overlay[hidden]{display:none}#overlay>span{letter-spacing:3px;font-size:10px;color:var(--green)}#overlay h3{font-size:25px}#overlay p{font-size:12px;color:var(--muted);margin-bottom:25px}.game-bottom{padding:15px 0 0}.keyboard{border-top:1px solid var(--line);margin-top:15px;padding-top:12px;display:flex;justify-content:space-between;gap:8px;font-size:11px}.keyboard select{max-width:125px;font-size:11px;border:1px solid var(--line);background:white}.about{max-width:760px;margin:auto;text-align:center;padding:100px 0}.about>p:not(.eyebrow){font-size:15px;line-height:2.2}.muted{color:var(--muted)}.signature{font-family:Georgia,serif;font-style:italic;color:var(--green);display:block;margin-top:30px}footer{max-width:1200px;padding:30px 32px;margin:auto;display:flex;justify-content:space-between;align-items:center;font-size:11px;color:var(--muted)}dialog{max-width:620px;width:calc(100% - 32px);max-height:85vh;overflow:auto;border:1px solid var(--line);border-radius:14px;padding:40px;background:var(--bg);color:var(--ink)}dialog::backdrop{background:#152e2980;backdrop-filter:blur(4px)}dialog p{font-size:14px}dialog h4{font-size:13px;margin:25px 0 10px}.close{position:absolute;right:18px;top:12px;border:0;background:none;font-size:28px;color:var(--muted)}.example{padding:18px;background:#e8eedc;border-radius:8px}.chips{display:inline-block;margin:4px;padding:5px 10px;background:white;border:1px solid var(--line);border-radius:5px;font-size:12px}@media(max-width:850px){header{padding:20px;flex-wrap:wrap;gap:15px}.brand{font-size:18px}nav{gap:18px;font-size:12px}main{padding:0 20px}.hero{grid-template-columns:1fr;min-height:0;padding-top:60px}.orbital{height:350px;max-width:420px;width:100%;margin:auto}.orbit{width:280px;height:280px}.o2,.o3{height:150px}.hero-foot{margin-top:30px}.section-head{display:block}.branches,.ai-grid{grid-template-columns:1fr}.play-section{grid-template-columns:1fr;gap:30px}.game-panel{max-width:480px;width:100%;margin:auto}section{padding:60px 0}.map{padding:20px}.branch{padding:16px}footer{flex-wrap:wrap;gap:10px}dialog{padding:30px 24px}.hero .text-link{margin-left:0;display:block}}