:root{color-scheme:light;--ink:#173e36;--paper:#f5f4ed;--muted:#6b7a73;--line:#dce0d6;--orange:#db653e}*{box-sizing:border-box}body{margin:0;background:var(--paper);color:var(--ink);font-family:"PingFang SC","Microsoft YaHei",sans-serif}header,main,footer{max-width:1320px;margin:auto}header{height:108px;display:flex;align-items:center;justify-content:space-between;padding:0 44px;border-bottom:1px solid var(--line)}.brand{display:flex;gap:10px;align-items:center;color:inherit;text-decoration:none;font-family:Georgia,serif;font-weight:700;font-size:27px;letter-spacing:-1px}.mark{display:grid;place-items:center;background:var(--ink);color:var(--paper);width:34px;height:34px;border-radius:50% 50% 5px 50%;font-size:30px;font-style:italic}.brand-note{font-family:"PingFang SC",sans-serif;font-size:12px;font-weight:400;letter-spacing:1px;margin-left:18px;color:var(--muted)}.edition{font-size:10px;letter-spacing:2px;color:var(--muted)}main{padding:54px 44px 38px;display:grid;grid-template-columns:1fr 1.06fr;gap:68px;align-items:start}.eyebrow{font-size:13px;letter-spacing:3px;margin:10px 0 25px;display:flex;align-items:center;gap:9px}.eyebrow span{width:7px;height:7px;background:var(--orange);border-radius:50%}h1{font-size:clamp(36px,3.7vw,55px);line-height:1.35;letter-spacing:-2px;margin:0 0 22px;font-family:"Songti SC","Noto Serif CJK SC",serif;font-weight:600}.accent{color:var(--orange)}.description{font-size:14px;line-height:2;color:var(--muted)}.topics{display:flex;gap:8px;margin:25px 0 28px}.topics span{border:1px solid #d4dacd;border-radius:24px;padding:7px 13px;font-size:11px}.landscape{height:225px;position:relative;overflow:hidden;border-radius:4px;background:#e2e8db}.sun{position:absolute;width:61px;height:61px;border-radius:50%;background:#e9ad70;left:62%;top:22px}.mountain{position:absolute;inset:30px -40px -10px;background:#9aafa0;clip-path:polygon(0 90%,37% 0,53% 50%,68% 25%,100% 100%,0 100%)}.front{inset:85px -15px -20px;background:#456e5d;clip-path:polygon(0 100%,23% 25%,40% 75%,70% 3%,100% 85%,100% 100%)}.land-label{position:absolute;bottom:22px;left:23px;color:#fff8e6;font-family:Georgia,serif;font-size:13px;line-height:1.6;letter-spacing:2px}.coordinate{position:absolute;right:20px;bottom:24px;color:#ecf0e3;font-size:10px;letter-spacing:2px}.intro-note{font-size:11px;color:var(--muted);letter-spacing:1px;margin-top:14px}.chat-card{background:#fff;border:1px solid var(--line);border-radius:18px;overflow:hidden;box-shadow:0 12px 40px #173e3607}.chat-heading{height:71px;padding:0 23px;border-bottom:1px solid #eef0e9;display:flex;align-items:center;justify-content:space-between}.chat-heading>div{display:flex;align-items:center;gap:11px}.chat-heading strong{font-size:14px;font-weight:500}.chat-icon{width:31px;height:31px;border-radius:10px;display:grid;place-items:center;background:#edf2e9;font-size:23px}.badge{font-size:10px;color:var(--muted);border:1px solid var(--line);border-radius:20px;padding:4px 8px}.chat-container{height:475px;position:relative;min-width:0}.welcome{height:100%;display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;padding:24px}.welcome-icon{font-size:45px;color:var(--orange);margin-bottom:20px}.welcome h2{font-size:23px;font-family:"Songti SC",serif;font-weight:600;margin:0 0 10px}.welcome p{color:var(--muted);line-height:1.9;font-size:13px}button{font:inherit;border:0;border-radius:30px;color:#fff;background:var(--ink);padding:14px 24px;cursor:pointer;font-size:14px;min-width:175px;margin:20px 0 5px}button span{margin-left:30px}button:hover{background:#2e5e4d}button:focus-visible{outline:3px solid var(--orange);outline-offset:4px}button:disabled{opacity:.6;cursor:wait}#status{font-size:11px;max-width:330px;min-height:22px}.chat-note{font-size:10px;line-height:1.8;color:#7b857e;padding:12px 20px;margin:0;border-top:1px solid #eef0e9}footer{display:flex;justify-content:space-between;gap:20px;border-top:1px solid var(--line);padding:23px 44px 28px;font-size:10px;color:var(--muted)}.muted{margin-left:12px}@media(max-width:800px){header{height:76px;padding:0 22px}.brand{font-size:24px}.brand-note{font-size:10px;margin-left:5px;letter-spacing:0}.edition{display:none}main{padding:28px 18px;grid-template-columns:1fr;gap:22px}.intro{padding:0 6px}.eyebrow{margin:0 0 13px;font-size:11px}h1{font-size:34px;letter-spacing:-1px;line-height:1.3;margin-bottom:12px}h1 br{display:none}.description{font-size:12px;margin:0}.desktop{display:none}.topics{margin:16px 0 0}.landscape,.intro-note{display:none}.chat-heading{height:58px;padding:0 17px}.chat-container{height: min(560px,65dvh);min-height:370px}.welcome h2{font-size:21px}.chat-note{font-size:9px}footer{padding:18px 24px;flex-direction:column;gap:9px}.chat-card{border-radius:14px}}