:root{--ink:#202624;--muted:#6b7470;--line:#dfe4e1;--paper:#f5f7f5;--white:#fff;--accent:#e96248;--accent-dark:#c84832;--green:#26886a;--soft-green:#e8f4ef;--danger:#b83e32;--shadow:0 16px 45px rgba(30,38,35,.12);font-family:Inter,"PingFang SC","Microsoft YaHei",system-ui,sans-serif;color:var(--ink);background:var(--paper)}
*{box-sizing:border-box}html,body{margin:0;min-height:100%}body{letter-spacing:0}button,input,textarea{font:inherit;letter-spacing:0}button,a{transition:background-color .18s,color .18s,border-color .18s,transform .18s}a{color:inherit}.muted{color:var(--muted)}
.brand-mark,.avatar,.message-avatar{display:grid;place-items:center;background:var(--ink);color:var(--white);font-weight:800}.brand-mark{width:48px;height:48px;border-radius:8px;margin-bottom:18px}.brand-mark.small{width:32px;height:32px;margin:0;font-size:14px}.button{display:inline-flex;align-items:center;justify-content:center;min-height:42px;border:1px solid transparent;border-radius:6px;padding:0 18px;font-weight:700;text-decoration:none;cursor:pointer}.button.primary{background:var(--accent);color:#fff}.button.primary:hover{background:var(--accent-dark)}.button.secondary{background:#fff;border-color:var(--line);color:var(--ink)}.button.secondary:hover{border-color:var(--ink)}
.notice{padding:13px 15px;border-radius:6px;margin:18px 0;font-size:14px}.notice.success{background:var(--soft-green);color:#17634d;border:1px solid #bee0d2}.notice.error{background:#fff0ed;color:var(--danger);border:1px solid #efc1ba}
.setup-page{display:flex;align-items:center;justify-content:center;padding:40px 18px;background:#eef2ef}.setup-shell{width:100%;max-width:760px;background:#fff;border:1px solid var(--line);border-radius:8px;padding:38px;box-shadow:var(--shadow)}.setup-shell.compact{max-width:430px}.setup-shell h1{margin:0;font-size:30px}.setup-shell h2{font-size:17px;margin:28px 0 14px}.setup-form{display:grid;gap:16px;margin-top:24px}.setup-form label,.settings-form label{display:grid;gap:7px;font-size:13px;font-weight:700;color:#3f4844}.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:14px}.form-grid .wide{grid-column:1/-1}input,textarea{width:100%;border:1px solid #cfd6d2;border-radius:6px;background:#fff;color:var(--ink);padding:11px 12px;outline:none}input:focus,textarea:focus{border-color:var(--green);box-shadow:0 0 0 3px rgba(38,136,106,.12)}textarea{resize:vertical;line-height:1.65}
.chat-page{height:100vh;min-height:540px;background:#edf1ee;overflow:hidden}.chat-shell{width:min(860px,100%);height:100%;margin:auto;background:#fff;display:grid;grid-template-rows:auto minmax(0,1fr) auto auto auto;border-left:1px solid var(--line);border-right:1px solid var(--line)}.chat-header{min-height:72px;padding:12px 22px;border-bottom:1px solid var(--line);display:flex;align-items:center;justify-content:space-between}.identity{display:flex;align-items:center;gap:12px;text-decoration:none}.avatar{width:44px;height:44px;border-radius:50%}.identity strong{display:block;font-size:15px}.identity small{display:flex;align-items:center;gap:6px;color:var(--muted);margin-top:3px}.identity small i{width:7px;height:7px;border-radius:50%;background:#2faa79}.icon-button{width:38px;height:38px;border:1px solid var(--line);border-radius:6px;background:#fff;font-size:20px;cursor:pointer}.icon-button:hover{background:var(--paper)}.messages{overflow-y:auto;padding:26px 22px 12px;scrollbar-color:#cbd2ce transparent}.message{display:flex;gap:10px;margin-bottom:20px;align-items:flex-start}.message.user{justify-content:flex-end}.message-avatar{width:30px;height:30px;min-width:30px;border-radius:50%;font-size:12px}.bubble{max-width:min(680px,82%);background:var(--paper);border:1px solid #e3e7e4;border-radius:8px;padding:12px 14px}.message.user .bubble{background:var(--ink);border-color:var(--ink);color:#fff}.bubble p{margin:0;line-height:1.7;word-break:break-word;font-size:15px}.ai-label{display:block;color:#8a938f;font-size:10px;margin-top:8px}.sources{border-top:1px solid #dce2de;margin-top:11px;padding-top:9px;display:flex;flex-wrap:wrap;gap:6px}.sources span{width:100%;font-size:11px;color:var(--muted)}.sources a{font-size:12px;text-decoration:none;color:#176d55;background:#e4f2ec;border-radius:4px;padding:5px 7px}.sources a:hover{text-decoration:underline}.typing .bubble p{color:var(--muted);animation:pulse 1.2s infinite}@keyframes pulse{50%{opacity:.45}}.suggestions{display:flex;gap:8px;padding:4px 22px 12px;overflow-x:auto}.suggestions[hidden]{display:none}.suggestions button{white-space:nowrap;background:#fff;border:1px solid var(--line);border-radius:6px;padding:8px 11px;color:#46504c;cursor:pointer;font-size:12px}.suggestions button:hover{border-color:var(--green);color:var(--green)}.composer{margin:0 22px 10px;border:1px solid #cdd5d0;border-radius:8px;padding:7px 7px 7px 12px;display:flex;align-items:flex-end;gap:8px;box-shadow:0 5px 20px rgba(32,38,36,.07)}.composer:focus-within{border-color:var(--green)}.composer textarea{border:0;box-shadow:none!important;padding:7px 0;resize:none;line-height:1.5;max-height:120px}.send-button{width:38px;height:38px;min-width:38px;border:0;border-radius:6px;background:var(--accent);color:#fff;font-size:21px;cursor:pointer}.send-button:hover{background:var(--accent-dark)}.send-button:disabled{opacity:.45;cursor:wait}.chat-shell footer{text-align:center;color:#8b938f;font-size:10px;padding:0 16px 10px}
.admin-page{background:#f3f5f3;min-height:100vh}.admin-header{height:66px;background:#fff;border-bottom:1px solid var(--line);display:flex;align-items:center;justify-content:space-between;padding:0 max(24px,calc((100vw - 1280px)/2))}.admin-brand{display:flex;align-items:center;gap:10px;text-decoration:none;font-weight:800}.admin-header nav{display:flex;gap:18px}.admin-header nav a{font-size:13px;color:var(--muted);text-decoration:none}.admin-header nav a:hover{color:var(--ink)}.admin-main{width:min(1280px,calc(100% - 36px));margin:24px auto 50px}.stats{display:grid;grid-template-columns:repeat(4,1fr);border:1px solid var(--line);border-radius:8px;background:#fff;margin-bottom:18px}.stats div{padding:20px;border-right:1px solid var(--line)}.stats div:last-child{border:0}.stats strong{display:block;font-size:22px;overflow-wrap:anywhere}.stats span{display:block;color:var(--muted);font-size:12px;margin-top:5px}.admin-layout{display:grid;grid-template-columns:minmax(0,2fr) minmax(280px,1fr);gap:18px;align-items:start}.panel{background:#fff;border:1px solid var(--line);border-radius:8px;padding:22px}.panel h2{font-size:17px;margin:0 0 17px}.panel-heading{display:flex;justify-content:space-between;gap:14px;align-items:start;border-bottom:1px solid var(--line);padding-bottom:18px;margin-bottom:20px}.panel-heading h2{margin:0 0 4px}.panel-heading p{margin:0;color:var(--muted);font-size:12px}.settings-form{display:grid;gap:17px}.conversation-list{display:grid;gap:0}.conversation-list article{padding:14px 0;border-top:1px solid var(--line)}.conversation-list article:first-child{border-top:0;padding-top:0}.conversation-list time{display:block;color:#8b938f;font-size:10px;margin-bottom:5px}.conversation-list strong{display:block;font-size:13px}.conversation-list p{color:var(--muted);font-size:12px;line-height:1.55;margin:5px 0 0}
@media(max-width:760px){.setup-shell{padding:25px 20px}.form-grid{grid-template-columns:1fr}.form-grid .wide{grid-column:auto}.chat-shell{border:0}.chat-header{padding-inline:15px}.messages{padding:20px 14px 8px}.bubble{max-width:88%}.suggestions{padding-inline:14px}.composer{margin-inline:14px}.admin-header{padding:0 16px}.admin-main{width:calc(100% - 24px);margin-top:14px}.stats{grid-template-columns:1fr 1fr}.stats div:nth-child(2){border-right:0}.stats div:nth-child(-n+2){border-bottom:1px solid var(--line)}.admin-layout{grid-template-columns:1fr}.panel{padding:17px}.panel-heading{align-items:center}}