:root{--ink:#142b35;--muted:#72848d;--accent:#087f79;--line:#dfe9e8;--canvas:#f3f7f6}*{box-sizing:border-box}body{margin:0;color:var(--ink);font:15px/1.7 system-ui,-apple-system,"Microsoft YaHei",sans-serif;background:var(--canvas)}[hidden]{display:none!important}button,input{font:inherit}button{cursor:pointer;transition:background .18s,transform .18s}button:hover:not(:disabled){filter:brightness(.94)}button:active:not(:disabled){transform:translateY(1px)}button:disabled{opacity:.45;cursor:default}button:focus-visible,input:focus-visible{outline:3px solid #68c7ba;outline-offset:3px}.shell{min-height:100dvh}.brandbar{height:90px;max-width:1220px;margin:auto;display:flex;justify-content:space-between;align-items:center;padding:0 40px}.brand{display:flex;gap:12px;align-items:center;color:var(--ink);font-size:19px;font-weight:750;text-decoration:none}.brandmark{display:grid;place-items:center;background:var(--accent);color:white;width:42px;height:44px;border-radius:13px;font-size:26px}.brand small{display:block;font-size:9px;letter-spacing:2px;font-weight:600;color:var(--muted);line-height:1.5}.secure-label{font-size:12px;color:var(--muted)}.background{padding:50px 32px 20px;background:radial-gradient(ellipse at 5% 10%,#e0eeea,transparent 55%)}.panel{max-width:1100px;margin:auto}#entry{display:grid;grid-template-columns:1.1fr 1fr;gap:85px;align-items:center;padding:35px 20px 70px}.eyebrow{font-size:12px;letter-spacing:3px;color:var(--accent);font-weight:700}.welcome-copy h1{font-size:clamp(32px,4vw,49px);letter-spacing:-2px;line-height:1.45;margin:24px 0}.lead{color:var(--muted);font-size:16px}.service-features{display:flex;flex-direction:column;gap:14px;margin-top:35px;font-size:13px;color:#49656c}.entry-card{background:white;border:1px solid var(--line);padding:38px;border-radius:22px;box-shadow:0 20px 65px #173e3510}.entry-icon{font-size:25px;color:var(--accent);background:#e9f5f1;border-radius:12px;width:48px;height:48px;text-align:center;line-height:48px}.entry-card h2{font-size:24px;margin:23px 0 7px}.entry-desc{color:var(--muted);font-size:13px;margin-bottom:30px}label{display:block;font-weight:650;font-size:13px;margin-bottom:9px}em{font-style:normal;color:var(--accent)}input{height:50px;border:1px solid var(--line);padding:12px 15px;border-radius:10px;background:#fbfdfc;width:100%;color:var(--ink);min-width:0}input:focus{border-color:var(--accent);outline:none}.start{width:100%;height:50px;background:var(--accent);color:white;border:0;border-radius:10px;margin-top:18px;font-weight:650}.privacy-tip{color:#88979d;font-size:11px;line-height:1.9;margin-top:22px}footer{text-align:center;color:#93a29f;font-size:10px;letter-spacing:2px;padding:22px}#note{font-size:13px;color:#ba483a;min-height:24px}#room{background:white;border:1px solid var(--line);border-radius:20px;padding:22px;max-width:900px;margin:auto;box-shadow:0 18px 60px #173e3510}.room-head{display:flex;justify-content:space-between;align-items:center;gap:16px;padding:2px 0 18px}.room-head strong{display:block}.room-head span{font-size:12px;color:var(--muted)}.visitor-actions{display:flex;gap:8px}.sound{background:#edf5f2;color:#38615a;padding:8px 10px;border:0;border-radius:8px;font-size:11px}.chat{height:clamp(300px,52dvh,620px);overflow:auto;background:#f3f7f6;border-radius:12px;padding:20px;scroll-behavior:smooth}.chat:empty:before{content:'正在连接客服，请稍候…';display:block;text-align:center;color:var(--muted);font-size:13px;padding:60px 0}.msg{font-size:14px;white-space:pre-wrap;overflow-wrap:anywhere;max-width:82%;width:fit-content;padding:12px 16px;margin:14px 0;background:white;border:1px solid #e1eae6;border-radius:4px 14px 14px}.msg.mine{margin-left:auto;background:#dcefe8;border-color:#cee6dc;border-radius:14px 4px 14px 14px}.composer{display:flex;gap:9px;align-items:center;padding-top:18px;flex-wrap:wrap}.composer input{flex:1;min-width:150px}.composer button{border:0;border-radius:10px;color:white;background:var(--accent);padding:12px 23px}.media-pick{font-size:12px;font-weight:500;white-space:nowrap;background:#edf5f2;color:#38615a;border-radius:9px;padding:12px;cursor:pointer;margin:0}.upload-status{font-size:11px;color:var(--muted)}.chat-attachment{display:block;max-width:min(320px,100%);max-height:280px;border-radius:10px;object-fit:contain;margin-top:8px}@media(max-width:720px){.brandbar{height:76px;padding:0 22px}.secure-label{font-size:10px}.background{padding:22px 16px}#entry{grid-template-columns:1fr;gap:28px;padding:0 4px 10px}.welcome-copy h1{font-size:32px;margin:14px 0}.welcome-copy h1 br{display:none}.lead{font-size:14px}.lead br{display:none}.service-features{display:none}.entry-card{padding:26px}.entry-desc{margin-bottom:23px}.entry-card h2{margin-top:14px}#room{padding:14px;border-radius:15px}.room-head{align-items:flex-start}.visitor-actions{flex-direction:column}.chat{height:calc(100dvh - 325px);min-height:250px;padding:12px}.composer input{flex-basis:100%}.composer button{margin-left:auto}.msg{max-width:90%}footer{font-size:9px}}