:root{--bg:#f2f5f7;--ink:#0e0f0c;--muted:#6a6c6a;--line:#e3e6e3;--green:#9fe870;--dgreen:#163300;--card:#fff}
*{box-sizing:border-box}html,body{height:100%;margin:0}
body{background:var(--bg);color:var(--ink);font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;display:flex;flex-direction:column;-webkit-font-smoothing:antialiased}
.hidden{display:none!important}
.brandbar{background:#fff;border-bottom:1px solid var(--line);height:64px;display:flex;align-items:center;padding:0 max(24px,calc(50vw - 440px));flex:none}
.brand{display:flex;align-items:center;gap:8px;font-weight:800;font-size:20px;color:var(--dgreen);letter-spacing:.5px}
.logo{width:30px;height:30px;border-radius:9px;background:var(--green);color:var(--dgreen);display:grid;place-items:center;font-size:16px}
.card{width:480px;max-width:calc(100% - 32px);margin:18px auto;flex:1;min-height:0;background:var(--card);border:1px solid var(--line);border-radius:16px;box-shadow:0 2px 14px rgba(14,15,12,.05);display:flex;flex-direction:column;overflow:hidden;position:relative;animation:pop .35s ease}
.chd{display:flex;align-items:center;gap:12px;padding:12px 14px;border-bottom:1px solid var(--line);flex:none}
.chd h1{font-size:18px;margin:0;font-weight:700}.stat{font-size:12px;color:var(--muted);flex:1;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.iconbtn{width:36px;height:36px;border-radius:50%;border:0;background:#eef0ee;color:var(--ink);display:grid;place-items:center;cursor:pointer;transition:background .15s,transform .1s}
.iconbtn:hover{background:#e2e5e2}.iconbtn:active{transform:scale(.92)}
.pill{border:0;background:#eef0ee;color:var(--ink);font-weight:600;font-size:13px;border-radius:999px;padding:8px 14px;cursor:pointer;transition:background .15s,transform .1s;font-family:inherit}
.pill:hover{background:#e2e5e2}.pill:active{transform:scale(.95)}.pill.dark{background:var(--dgreen);color:var(--green)}
.banner{background:#fff4e5;color:#8a4b00;font-size:13px;padding:7px 14px;display:flex;align-items:center;gap:8px;animation:down .25s ease}
.body{flex:1;overflow-y:auto;padding:8px 14px 16px;scroll-behavior:smooth}
.msgs{display:flex;flex-direction:column}
.sep{text-align:center;color:var(--muted);font-size:13px;margin:18px 0 10px}
.ended{text-align:center;color:var(--muted);font-size:13px;padding:14px 0 18px;border-bottom:1px solid var(--line);margin-bottom:6px}
.intro{text-align:center;padding:6px 20px 14px;color:#3a3c3a;font-size:13px;line-height:1.6}
.intro .ic{width:40px;height:40px;border-radius:50%;border:1px solid var(--line);display:grid;place-items:center;margin:4px auto 10px;font-weight:800;color:var(--dgreen);background:#fff}
.intro .t{font-size:14px;color:var(--ink);margin-bottom:4px}.intro a{color:var(--dgreen);font-weight:600;text-decoration:underline;text-underline-offset:3px;cursor:pointer}
.intro .how{margin-top:8px;background:#f6f8f6;border-radius:10px;padding:8px 12px;text-align:left}
.row{display:flex;flex-direction:column;margin:6px 0;animation:in .28s ease both}.row.me{align-items:flex-end}.row.bot{align-items:flex-start}
.bub{max-width:82%;padding:10px 14px;border-radius:18px;line-height:1.55;font-size:15px;white-space:pre-wrap;word-break:break-word}
.row.bot .bub{background:#fff;border:1px solid #d8dbd8}.row.me .bub{background:var(--green);color:var(--dgreen)}
.row.admin .bub{background:#fff;border:1px solid var(--dgreen)}
.bub.img{padding:4px;background:#fff!important;border:1px solid var(--line)}.bub img{display:block;max-width:220px;max-height:260px;border-radius:14px}
.meta{font-size:12px;color:var(--muted);margin:4px 2px 0}
.sys{text-align:center;color:var(--muted);font-size:13px;margin:10px 0;animation:in .28s ease both}
.typing{display:flex;gap:4px;padding:14px 16px}.typing i{width:7px;height:7px;border-radius:50%;background:#9a9d9a;animation:bounce 1.2s infinite}
.typing i:nth-child(2){animation-delay:.15s}.typing i:nth-child(3){animation-delay:.3s}
.composer{display:flex;align-items:center;gap:8px;padding:12px 14px 14px;border-top:1px solid var(--line);flex:none;background:#fff}
.attach{width:40px;height:40px;border-radius:50%;display:grid;place-items:center;color:var(--muted);cursor:pointer;flex:none;transition:background .15s}.attach:hover{background:#eef0ee}
.attach.busy{pointer-events:none}.attach.busy svg{display:none}.attach.busy::after{content:"";width:18px;height:18px;border:2px solid #cfd3cf;border-top-color:var(--dgreen);border-radius:50%;animation:spin .8s linear infinite}
.inputwrap{flex:1;display:flex;align-items:flex-end;border:1px solid #868685;border-radius:24px;padding:5px 5px 5px 16px;transition:border-color .15s,box-shadow .15s}
.inputwrap:focus-within{border-color:var(--dgreen);box-shadow:0 0 0 3px rgba(159,232,112,.35)}
.inputwrap textarea{flex:1;border:0;outline:0;resize:none;font:inherit;font-size:15px;line-height:22px;padding:6px 0;max-height:120px;background:transparent;color:var(--ink)}
.send{width:34px;height:34px;border-radius:50%;border:0;background:var(--green);color:var(--dgreen);display:grid;place-items:center;cursor:pointer;flex:none;transition:transform .1s,filter .15s,opacity .15s}
.send:hover{filter:brightness(.95)}.send:active{transform:scale(.86)}.send:disabled{opacity:.45;cursor:default}
.loading{padding:20px 4px}.skel{height:40px;border-radius:18px;background:linear-gradient(90deg,#eef0ee 25%,#f7f8f7 50%,#eef0ee 75%);background-size:200% 100%;animation:shim 1.2s infinite;margin:12px 0;width:62%}
.skel.r{margin-left:auto;width:40%}.skel.w{width:75%;height:58px}
.spin{width:22px;height:22px;border:2.5px solid #dfe2df;border-top-color:var(--dgreen);border-radius:50%;animation:spin .8s linear infinite;margin:18px auto}.spin.sm{width:14px;height:14px;border-width:2px;margin:0;border-top-color:#8a4b00}
.modal{position:fixed;inset:0;background:rgba(14,15,12,.35);display:grid;place-items:center;z-index:9;animation:fade .2s}
.mbox{background:#fff;border-radius:16px;padding:22px;width:min(340px,90vw);animation:pop .25s ease}.mbox h3{margin:0 0 6px}.mbox p{color:var(--muted);font-size:14px;margin:0 0 18px}.mact{display:flex;justify-content:flex-end;gap:8px}
@keyframes in{from{opacity:0;transform:translateY(8px)}to{opacity:1;transform:none}}
@keyframes pop{from{opacity:0;transform:scale(.97)}to{opacity:1;transform:none}}
@keyframes down{from{opacity:0;transform:translateY(-100%)}to{opacity:1;transform:none}}
@keyframes fade{from{opacity:0}to{opacity:1}}@keyframes spin{to{transform:rotate(360deg)}}
@keyframes bounce{0%,60%,100%{transform:translateY(0);opacity:.5}30%{transform:translateY(-5px);opacity:1}}
@keyframes shim{to{background-position:-200% 0}}
@media (max-width:600px){.brandbar{display:none}.card{width:100%;max-width:100%;margin:0;border:0;border-radius:0;box-shadow:none}.composer{padding-bottom:max(14px,env(safe-area-inset-bottom))}}
@media (prefers-reduced-motion:reduce){*{animation:none!important;transition:none!important}}
/* mobile hardening */
html,body{overscroll-behavior:none;-webkit-text-size-adjust:100%;text-size-adjust:100%}
body{height:100vh;height:100dvh;height:var(--vvh,100dvh);overflow:hidden}
.body{overscroll-behavior:contain;-webkit-overflow-scrolling:touch}
.inputwrap textarea{font-size:16px}
@media (max-width:600px){
 html,body{position:fixed;inset:0;width:100%}
 body{height:var(--vvh,100dvh)}
 .card{height:100%;padding-left:env(safe-area-inset-left);padding-right:env(safe-area-inset-right)}
 .chd{padding-top:max(12px,env(safe-area-inset-top))}
 .bub{font-size:16px}
}
.chips{display:flex;flex-wrap:wrap;gap:8px;margin:2px 0 10px;animation:in .3s ease both}
.chip{border:1px solid var(--dgreen);background:#fff;color:var(--dgreen);border-radius:999px;padding:7px 13px;font-size:14px;font-family:inherit;cursor:pointer;transition:background .15s,transform .1s;line-height:1.3}
.chip:hover{background:#eef8e6}.chip:active{transform:scale(.95);background:var(--green)}
@media (max-width:600px){.chip{font-size:15px;padding:8px 13px}}
.chip.up{background:var(--green);border-color:var(--green);font-weight:600}