:root{--ink:#172a3a;--muted:#687986;--line:#d9ddd9;--paper:#f4f0e8;--card:#fffdf8;--accent:#e45b36;--deep:#173d4e;--shadow:0 24px 70px rgba(26,45,55,.12)}
*{box-sizing:border-box}
html{height:100%;background:var(--paper)}
body{min-height:100%;margin:0;color:var(--ink);background:radial-gradient(circle at 13% 12%,rgba(255,255,255,.9) 0 8%,transparent 30%),linear-gradient(120deg,#eee8dd,#f7f4ed 45%,#ece7dc);font-family:"Avenir Next","PingFang SC","Microsoft YaHei",sans-serif;-webkit-font-smoothing:antialiased}
button,input,textarea{font:inherit}
button{color:inherit}
button:focus-visible,input:focus-visible,textarea:focus-visible,summary:focus-visible{outline:2px solid var(--accent);outline-offset:3px}
.grain{position:fixed;inset:0;opacity:.22;pointer-events:none;background-image:url("data:image/svg+xml,%3Csvg viewBox='0 0 180 180' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.92' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='.08'/%3E%3C/svg%3E")}
.topbar{height:76px;padding:0 clamp(20px,3vw,52px);display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid rgba(25,43,54,.13);position:relative;z-index:3}
.brand{display:flex;gap:12px;align-items:center;color:inherit;text-decoration:none}
.brand-mark{width:35px;height:35px;position:relative;display:block;transform:rotate(-8deg)}
.brand-mark i{position:absolute;width:20px;height:20px;border:1.5px solid var(--deep);border-radius:50%}
.brand-mark i:nth-child(1){left:0;top:0}.brand-mark i:nth-child(2){right:0;top:0}.brand-mark i:nth-child(3){left:7px;bottom:0;background:var(--accent);border-color:var(--accent);mix-blend-mode:multiply}
.brand b{display:block;font-size:15px;letter-spacing:.08em}.brand small{display:block;margin-top:3px;color:var(--muted);font-size:9px;letter-spacing:.19em}
.top-actions{display:flex;align-items:center;gap:12px}.mode-pill{display:flex;align-items:center;gap:8px;font-size:12px;color:#53636e;border:1px solid #ccd2ce;background:rgba(255,255,255,.53);border-radius:99px;padding:8px 12px}.mode-pill i{width:7px;height:7px;background:#5d8f6d;border-radius:50%;box-shadow:0 0 0 4px rgba(93,143,109,.12)}
.icon-button{width:38px;height:38px;border:1px solid #cbd1cd;background:rgba(255,255,255,.58);border-radius:50%;display:grid;place-items:center;cursor:pointer}.icon-button svg{width:18px;fill:none;stroke:currentColor;stroke-width:1.5}.icon-button:hover{background:#fff}
.workspace{height:calc(100vh - 76px);min-height:630px;display:grid;grid-template-columns:minmax(240px,310px) minmax(470px,1fr) minmax(230px,300px);gap:clamp(14px,1.6vw,28px);padding:clamp(16px,2vw,30px) clamp(20px,3vw,52px) clamp(22px,2.5vw,40px);position:relative;z-index:1}
.product-panel,.evidence-panel{min-height:0;padding:12px 0;overflow:auto;scrollbar-width:thin}
.eyebrow,.section-label{font-size:10px;font-weight:700;letter-spacing:.18em;color:#7a827f;text-transform:uppercase}.eyebrow span{display:inline-grid;place-items:center;width:25px;height:25px;border:1px solid #c9cec9;border-radius:50%;margin-right:8px;color:var(--accent)}
.product-panel h1{font-family:"Iowan Old Style","Songti SC","STSong",serif;font-size:clamp(34px,3.3vw,53px);font-weight:500;letter-spacing:-.04em;line-height:1.04;margin:29px 0 9px}.tagline{font-family:"Songti SC","STSong",serif;font-size:17px;color:var(--deep);margin:0 0 24px}.description{font-size:13px;line-height:1.85;color:#61717b;max-width:28em}
.capabilities{margin-top:30px;border-top:1px solid var(--line);padding-top:19px}.capability-list{margin-top:8px}.capability-list article{display:flex;gap:13px;padding:13px 0;border-bottom:1px solid rgba(112,123,123,.17)}.capability-list article>span{display:grid;place-items:center;flex:none;width:27px;height:27px;margin-top:1px;border:1px solid #bcc7c5;border-radius:50%;color:var(--deep);font-family:"Iowan Old Style",serif;font-size:12px}.capability-list b{font-size:13px}.capability-list p{font-size:11px;color:#78858c;margin:4px 0 0;line-height:1.5}
.knowledge-card{margin-top:24px;padding:18px;border:1px solid #d0d5d0;background:rgba(255,255,255,.48);box-shadow:4px 5px 0 rgba(25,61,78,.05)}.knowledge-head{display:flex;justify-content:space-between;align-items:center}.knowledge-head .section-label{display:block}.knowledge-head strong{display:block;margin-top:7px;font-family:"Iowan Old Style","Songti SC",serif;font-size:23px;font-weight:500}.pulse-dot{width:8px;height:8px;border-radius:50%;background:var(--accent);box-shadow:0 0 0 5px color-mix(in srgb,var(--accent) 13%,transparent)}.knowledge-card p{font-size:11px;line-height:1.7;color:#718089;margin:12px 0}.text-button{border:0;background:none;padding:0;font-size:12px;font-weight:700;color:var(--deep);cursor:pointer}.text-button span{color:var(--accent);margin-left:4px}.edit-hint{font-size:11px;line-height:1.65;color:#7a8589;margin:22px 0}.edit-hint b{color:#425866}.edit-hint code{font-size:10px;background:#e8e4db;padding:2px 4px;border-radius:3px}
.chat-panel{min-height:0;display:flex;flex-direction:column;background:var(--card);border:1px solid #d7dbd6;box-shadow:var(--shadow);position:relative;overflow:hidden;animation:arrive .55s cubic-bezier(.2,.8,.2,1) both}.chat-panel::before{content:"";height:4px;background:linear-gradient(90deg,var(--accent) 0 19%,var(--deep) 19% 72%,#c7a979 72%);flex:none}
.chat-head{height:76px;padding:0 25px;display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid #ebece7}.assistant-identity{display:flex;align-items:center;gap:11px}.assistant-avatar{width:39px;height:39px;border:1px solid #cbd5d4;background:#f5f2e9;border-radius:50%;display:grid;place-items:center}.assistant-avatar svg{width:29px;fill:none;stroke:var(--deep);stroke-width:1.5;stroke-linejoin:round}.assistant-avatar .spark{fill:var(--accent);stroke:var(--accent)}.assistant-identity h2{font-size:15px;margin:0;letter-spacing:.04em}.assistant-identity p{font-size:10px;color:#7b898d;margin:4px 0 0}.clear-button{border:0;background:transparent;color:#7d888b;font-size:11px;cursor:pointer;padding:8px}.clear-button:hover{color:var(--accent)}
.messages{flex:1;min-height:0;overflow:auto;padding:24px clamp(22px,4vw,56px);scrollbar-color:#cbd1cc transparent}.message{margin:0 0 24px;animation:message-in .28s ease both}.message.user{max-width:78%;margin-left:auto}.message-label{font-size:10px;letter-spacing:.12em;font-weight:700;color:#7d898a;margin:0 0 7px}.message.user .message-label{text-align:right}.message-bubble{font-family:"Songti SC","STSong",serif;font-size:15px;line-height:1.78;color:#2e414a}.message-bubble p{margin:0 0 9px}.message-bubble ol{margin:3px 0 10px;padding-left:1.6em}.message-bubble li{padding-left:5px;margin:8px 0}.message.user .message-bubble{font-family:"Avenir Next","PingFang SC",sans-serif;background:#eef1ed;border:1px solid #e1e5df;padding:13px 16px;font-size:13px;line-height:1.65}.message-meta{font-size:10px;color:#8a9698;border-top:1px solid #ecece7;padding-top:8px;margin-top:11px}.thinking .message-bubble{color:#819093;font-style:italic}.thinking .message-bubble::after{content:"";display:inline-block;width:18px;height:2px;margin-left:8px;vertical-align:middle;background:linear-gradient(90deg,var(--accent),transparent);animation:scan 1s ease-in-out infinite}
.starter{margin:auto;width:min(580px,86%);padding:25px 0}.starter[hidden]{display:none}.starter-kicker{color:var(--accent);font-size:10px;font-weight:800;letter-spacing:.2em;text-transform:uppercase}.starter h3{font-family:"Iowan Old Style","Songti SC","STSong",serif;font-size:clamp(25px,2.7vw,38px);font-weight:500;line-height:1.35;margin:10px 0 28px;letter-spacing:-.025em}.suggestion-grid{display:grid;grid-template-columns:1fr 1fr;border-top:1px solid #dfe1dc}.suggestion-grid button{display:grid;grid-template-columns:24px 1fr 16px;gap:8px;align-items:start;text-align:left;min-height:70px;padding:16px 10px;border:0;border-bottom:1px solid #dfe1dc;background:transparent;cursor:pointer;font-size:12px;line-height:1.55}.suggestion-grid button:nth-child(odd){border-right:1px solid #dfe1dc}.suggestion-grid button span{font-family:"Iowan Old Style",serif;color:var(--accent);font-size:11px}.suggestion-grid button i{font-style:normal;color:#9aa3a3;transition:transform .2s}.suggestion-grid button:hover{background:#f6f3eb}.suggestion-grid button:hover i{transform:translate(2px,-2px);color:var(--accent)}
.composer-wrap{padding:13px clamp(16px,3vw,34px) 15px;background:#fbfaf5;border-top:1px solid #e7e7e1}.composer{display:flex;align-items:flex-end;gap:10px;padding:7px 7px 7px 15px;border:1px solid #cfd5d1;background:#fff;box-shadow:0 5px 18px rgba(27,45,51,.05)}.composer:focus-within{border-color:#8a9b9a;box-shadow:0 0 0 3px rgba(23,61,78,.07)}.composer textarea{resize:none;flex:1;height:42px;min-height:42px;max-height:132px;padding:10px 0;border:0;outline:0;background:transparent;color:var(--ink);font-size:13px;line-height:1.65}.composer textarea::placeholder{color:#a0aaa9}.send-button{height:40px;min-width:84px;border:0;background:var(--deep);color:#fff;display:flex;align-items:center;justify-content:center;gap:7px;cursor:pointer}.send-button svg{width:15px;fill:none;stroke:currentColor;stroke-width:1.5}.send-button:hover{background:#0f303e}.send-button:disabled{opacity:.45;cursor:wait}.answer-boundary{text-align:center;font-size:9px;color:#949d9c;margin:8px 0 0}
.evidence-panel{padding-left:2px}.evidence-panel h2{font-family:"Iowan Old Style","Songti SC","STSong",serif;font-size:29px;font-weight:500;margin:25px 0 9px}.evidence-intro{font-size:11px;line-height:1.7;color:#7b888b;padding-bottom:18px;border-bottom:1px solid var(--line)}.source-list{margin-top:4px}.source-empty{min-height:170px;display:grid;place-items:center;align-content:center;text-align:center;color:#929c9c}.source-empty span{font-family:"Iowan Old Style",serif;font-size:31px;color:#b8beb9}.source-empty p{font-size:11px;line-height:1.7;max-width:170px}.source-card{border-bottom:1px solid var(--line)}.source-card summary{list-style:none;cursor:pointer;display:grid;grid-template-columns:25px 1fr 16px;gap:9px;padding:17px 2px;align-items:start}.source-card summary::-webkit-details-marker{display:none}.source-card summary>span{font-family:"Iowan Old Style",serif;color:var(--accent);font-size:11px}.source-card summary b{display:block;font-size:12px;line-height:1.5}.source-card summary small{display:block;margin-top:4px;color:#869091;font-size:9px;letter-spacing:.08em}.source-card summary i{font-style:normal;color:#83908f;transition:transform .2s}.source-card[open] summary i{transform:rotate(180deg)}.source-card>p{margin:0 0 10px 34px;font-family:"Songti SC","STSong",serif;font-size:12px;line-height:1.75;color:#566970}.match-line{margin:0 0 16px 34px;font-size:9px;color:#919a99}
.mobile-source-list{display:none}
dialog{padding:0;border:0;background:transparent;color:var(--ink);max-width:none}dialog::backdrop{background:rgba(15,30,38,.42);backdrop-filter:blur(5px)}.dialog-shell{width:min(680px,calc(100vw - 32px));max-height:min(760px,calc(100vh - 40px));overflow:auto;background:var(--card);border:1px solid #d9dcd6;box-shadow:0 30px 90px rgba(10,26,34,.25);padding:28px}.dialog-shell header{display:flex;justify-content:space-between;align-items:start;border-bottom:1px solid #dedfd9;padding-bottom:18px}.dialog-shell h2{font-family:"Iowan Old Style","Songti SC",serif;font-size:30px;font-weight:500;margin:7px 0 0}.dialog-close{border:0;background:transparent;font-family:"Iowan Old Style",serif;font-size:29px;cursor:pointer;color:#7d8988}.library-list details{border-bottom:1px solid #e1e2dd}.library-list summary{list-style:none;display:grid;grid-template-columns:32px 1fr 20px;gap:10px;padding:17px 2px;cursor:pointer}.library-list summary::-webkit-details-marker{display:none}.library-list summary>span{font-family:"Iowan Old Style",serif;color:var(--accent)}.library-list summary b{display:block;font-size:13px}.library-list summary small{display:block;font-size:10px;color:#899492;margin-top:4px}.library-list summary i{font-style:normal}.library-list details[open] summary i{transform:rotate(45deg)}.library-list details>p{font-family:"Songti SC","STSong",serif;font-size:13px;line-height:1.9;color:#50636b;margin:0 34px 18px 42px}
.settings-form{width:min(560px,calc(100vw - 32px))}.settings-lead{font-size:12px;line-height:1.75;color:#69787d;margin:20px 0}.settings-form>label:not(.remember){display:block;margin:14px 0}.settings-form label>span{display:block;font-size:11px;font-weight:700;margin-bottom:7px}.settings-form input[type="url"],.settings-form input[type="text"],.settings-form input[type="password"]{width:100%;height:43px;border:1px solid #ccd2ce;background:#fff;padding:0 12px;outline:0;font-size:13px}.settings-form input:focus{border-color:var(--deep)}.remember{display:flex;gap:8px;align-items:center;margin-top:15px}.remember span{margin:0!important;font-weight:500!important}.security-note{font-size:10px;line-height:1.7;color:#8a6961;background:#f7ede8;padding:10px 12px}.settings-actions{display:flex;justify-content:flex-end;gap:9px;margin-top:22px}.primary-button,.secondary-button{height:40px;padding:0 16px;cursor:pointer}.primary-button{background:var(--deep);border:1px solid var(--deep);color:white}.secondary-button{background:transparent;border:1px solid #bdc6c3}.settings-form output{display:block;color:#bb492e;font-size:11px;margin-top:10px}.fatal{max-width:600px;margin:15vh auto;padding:30px;background:white}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip-path:inset(50%);white-space:nowrap;border:0}
@keyframes arrive{from{opacity:0;transform:translateY(10px) scale(.995)}to{opacity:1;transform:none}}@keyframes message-in{from{opacity:0;transform:translateY(6px)}to{opacity:1;transform:none}}@keyframes scan{50%{width:32px;opacity:.4}}
@media(max-width:1100px){.workspace{grid-template-columns:minmax(220px,270px) minmax(460px,1fr)}.evidence-panel{display:none}.description{font-size:12px}.product-panel h1{font-size:39px}}
@media(max-width:720px){
  .topbar{height:62px;padding:0 14px}.brand-mark{width:30px;height:30px}.brand-mark i{width:17px;height:17px}.brand small{display:none}.mode-pill{display:none}.workspace{height:calc(100dvh - 62px);min-height:0;display:block;padding:0}.product-panel,.evidence-panel{display:none}.chat-panel{height:100%;border:0;box-shadow:none}.chat-panel::before{height:3px}.chat-head{height:64px;padding:0 15px}.messages{padding:18px 16px}.message.user{max-width:88%}.message-bubble{font-size:14px}.starter{width:100%;padding:22px 18px;margin:auto}.starter h3{font-size:26px;margin-bottom:21px}.suggestion-grid{grid-template-columns:1fr}.suggestion-grid button:nth-child(odd){border-right:0}.suggestion-grid button{min-height:56px;padding:12px 7px}.composer-wrap{padding:9px 10px max(10px,env(safe-area-inset-bottom))}.composer{padding-left:11px}.send-button{min-width:46px;width:46px}.send-button span{display:none}.answer-boundary{font-size:8px}.dialog-shell{padding:21px;max-height:calc(100dvh - 20px)}.settings-actions{flex-direction:column-reverse}.primary-button,.secondary-button{width:100%}
  .mobile-source-list{display:block;margin-top:14px;border-top:1px solid #e2e3dd;padding-top:10px}.mobile-source-list>b{font-size:10px;letter-spacing:.12em;color:#7c898a}.mobile-source-list details{border-bottom:1px solid #e7e7e1}.mobile-source-list summary{list-style:none;cursor:pointer;padding:10px 0;font-size:11px;font-weight:700}.mobile-source-list summary::-webkit-details-marker{display:none}.mobile-source-list summary span{float:right;color:var(--accent);font-size:9px;font-weight:500}.mobile-source-list p{font-family:"Songti SC","STSong",serif;font-size:11px!important;line-height:1.75;color:#65767b;margin:0 0 10px!important}
}
@media(prefers-reduced-motion:reduce){*,*::before,*::after{animation:none!important;transition:none!important;scroll-behavior:auto!important}}

/* 本Demo独立样式，不修改主课布局。 */
:root{--ink:#19365a;--muted:#61768e;--line:#d6e1ef;--paper:#f3f7fc;--card:#fff;--deep:#19365a}
body{background:var(--paper)}.grain{display:none}.message-bubble{font-family:inherit}.source-card>p,.mobile-source-list p,.library-list details>p{font-family:inherit}.source-card>p{font-size:14px}.source-card summary b{font-size:14px}.answer-boundary{font-size:11px}.source-document{display:block;margin:0 0 14px 34px;color:#286ac8;font-size:13px}.mobile-source-list .source-document{margin-left:0}.message-meta{font-size:11px}.chat-head{flex-shrink:0}.composer textarea{min-width:0}.workspace{grid-template-columns:minmax(220px,280px) minmax(360px,1fr) minmax(220px,280px)}
@media(max-width:1100px){.workspace{grid-template-columns:minmax(200px,250px) minmax(300px,1fr)}.mobile-source-list{display:block}.mobile-source-list summary{cursor:pointer;padding:10px 0}.mobile-source-list p{font-size:14px!important;line-height:1.7}.mobile-source-list>b{font-size:13px}}
@media(max-width:720px){.workspace{display:block}.message-bubble{font-size:15px}.mobile-source-list summary{font-size:14px}.mobile-source-list p{font-size:14px!important}.answer-boundary{font-size:10px}.suggestion-grid button{font-size:14px}.composer textarea{font-size:16px}.settings-form label>span,.settings-lead{font-size:14px}}
@media print{*,*::before,*::after{animation:none!important;transition:none!important;opacity:1!important;transform:none!important}html,body{height:auto;min-height:0;background:white}.topbar{height:auto;padding:12px 0}.top-actions,.grain,.composer-wrap,.starter,.clear-button,.edit-hint,.knowledge-card button{display:none!important}.workspace{display:block;height:auto;min-height:0;padding:0}.product-panel{display:block;overflow:visible}.product-panel h1{font-size:22px;margin:8px 0}.description{max-width:none;font-size:10pt}.tagline{font-size:12pt;margin-bottom:8px}.capabilities,.knowledge-card{display:none}.chat-panel,.messages{height:auto;min-height:0;overflow:visible;display:block;box-shadow:none}.chat-head{height:auto;padding:10px}.messages{padding:14px}.message{break-inside:auto;margin-bottom:12px}.source-card,details{break-inside:avoid}.message-bubble{font-size:11pt;line-height:1.6}.mobile-source-list{display:block}.mobile-source-list p{font-size:10pt!important}.mobile-source-list details>p{display:block}.evidence-panel{display:none}.message.user{max-width:100%}}