:root{--bg:#0b0e13;--panel:#11161e;--panel2:#171d27;--line:#252d39;--text:#f4f7fb;--muted:#8e99aa;--accent:#72e6b1;--accent2:#9a84ff;--user:#253249}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--text);font:14px/1.5 Inter,"PingFang SC","Microsoft YaHei",sans-serif;min-height:100vh}body.light{--bg:#f3f6f9;--panel:#fff;--panel2:#f7f9fb;--line:#dfe5ec;--text:#17202c;--muted:#667286;--user:#e7effd}.topbar{height:72px;padding:0 4vw;border-bottom:1px solid var(--line);display:flex;align-items:center;justify-content:space-between;background:color-mix(in srgb,var(--bg) 88%,transparent);position:sticky;top:0;z-index:5;backdrop-filter:blur(14px)}.brand,.top-actions{display:flex;align-items:center;gap:12px}.brand-mark{width:38px;height:38px;border-radius:11px;display:grid;place-items:center;background:linear-gradient(145deg,var(--accent),var(--accent2));color:#07100c;font-weight:900}.brand strong,.brand small{display:block}.brand small,.eyebrow,small{color:var(--muted)}.status{color:var(--muted)}.status i{display:inline-block;width:7px;height:7px;border-radius:50%;background:var(--accent);margin-right:7px}.icon-button{border:1px solid var(--line);background:var(--panel);color:var(--text);border-radius:9px;width:36px;height:36px;cursor:pointer}main{max-width:1800px;margin:auto;padding:34px 3vw}.hero{display:flex;justify-content:space-between;gap:32px;align-items:end;margin-bottom:28px}.eyebrow{letter-spacing:.2em;font-size:11px;margin:0}.hero h1{font-size:clamp(28px,3vw,48px);line-height:1.1;margin:8px 0}.hero p{color:var(--muted)}.stats{display:grid;grid-template-columns:repeat(3,minmax(150px,1fr));gap:12px}.stats article{padding:16px 20px;border:1px solid var(--line);border-radius:14px;background:var(--panel)}.stats span,.stats small,.stats strong{display:block}.stats strong{font-size:26px}.stats small{white-space:nowrap;overflow:hidden;text-overflow:ellipsis;max-width:170px}.workspace{display:grid;grid-template-columns:260px minmax(320px,430px) minmax(420px,1fr);height:calc(100vh - 246px);min-height:580px;border:1px solid var(--line);border-radius:18px;overflow:hidden;background:var(--panel)}.filters,.conversation-list,.detail{min-height:0}.filters{padding:22px;border-right:1px solid var(--line)}.panel-title,.list-heading,.card-top{display:flex;justify-content:space-between;align-items:center}.panel-title h2,.list-heading h2{margin:2px 0 18px}.panel-title button{border:0;background:none;color:var(--accent);cursor:pointer}.filters label{display:block;color:var(--muted);font-size:12px;margin:18px 0}.filters input,.filters select{width:100%;margin-top:7px;padding:11px 12px;border:1px solid var(--line);border-radius:9px;background:var(--panel2);color:var(--text);outline:none}.notice{margin-top:28px;padding:14px;background:color-mix(in srgb,var(--accent2) 10%,var(--panel));border:1px solid color-mix(in srgb,var(--accent2) 35%,var(--line));border-radius:11px}.notice p{color:var(--muted);font-size:12px;margin:5px 0 0}.conversation-list{border-right:1px solid var(--line);overflow-y:auto}.list-heading{padding:20px;border-bottom:1px solid var(--line);position:sticky;top:0;background:var(--panel);z-index:2}.list-heading h2{margin:2px 0 0}.list-heading h2 span{font-size:12px;color:var(--muted);font-weight:400}.list-heading>span{color:var(--muted);font-size:12px}.conversation-card{width:100%;padding:18px 20px;border:0;border-bottom:1px solid var(--line);background:transparent;color:var(--text);display:flex;gap:12px;text-align:left;cursor:pointer}.conversation-card:hover,.conversation-card.active{background:var(--panel2)}.conversation-card.active{box-shadow:inset 3px 0 var(--accent)}.model-icon{width:34px;height:34px;flex:none;display:grid;place-items:center;border-radius:9px;background:linear-gradient(145deg,#28384b,#26322f);color:var(--accent);font-size:11px;font-weight:800}.card-copy{min-width:0;display:block;flex:1}.card-top time{font-size:10px;color:var(--muted)}.preview{display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;color:var(--muted);margin:8px 0}.meta{display:flex;gap:7px;flex-wrap:wrap}.meta em,.meta i{font-style:normal;font-size:10px;padding:2px 7px;border-radius:99px;background:var(--bg);color:var(--muted)}.meta em{color:var(--accent)}.detail{overflow-y:auto;background:var(--bg)}.conversation-detail>header{padding:24px 28px;border-bottom:1px solid var(--line);display:flex;justify-content:space-between;align-items:center;position:sticky;top:0;background:color-mix(in srgb,var(--bg) 92%,transparent);backdrop-filter:blur(12px);z-index:2}.conversation-detail h2{margin:3px 0}.conversation-detail header p{margin:0;color:var(--muted)}.badge{padding:6px 10px;border:1px solid var(--line);border-radius:99px;color:var(--muted)}.message-stream{padding:28px;max-width:980px;margin:auto}.message{display:flex;gap:12px;margin-bottom:22px}.avatar{width:34px;height:34px;flex:none;border-radius:10px;display:grid;place-items:center;background:var(--panel2);font-size:11px;font-weight:800}.role-user .avatar{background:var(--user);color:#91b8ff}.role-assistant .avatar{background:#183528;color:var(--accent)}.bubble{min-width:0;max-width:88%;padding:14px 16px;border:1px solid var(--line);border-radius:4px 14px 14px;background:var(--panel)}.role-user .bubble{background:var(--user)}.bubble>strong{text-transform:uppercase;font-size:10px;letter-spacing:.1em;color:var(--muted)}.part small{display:inline-block;margin:8px 0 3px;font-size:9px;text-transform:uppercase}.part pre{white-space:pre-wrap;overflow-wrap:anywhere;margin:0;font:13px/1.65 "Cascadia Code",Consolas,"Microsoft YaHei",monospace;max-height:560px;overflow:auto}.empty{padding:30px;text-align:center;color:var(--muted)}.large{margin:80px auto}[hidden]{display:none!important}@media(max-width:1100px){.workspace{grid-template-columns:220px 340px minmax(400px,1fr);overflow:auto}.stats{display:none}}@media(max-width:760px){main{padding:20px 12px}.hero{display:block}.workspace{display:block;height:auto;overflow:visible}.filters{border-right:0;border-bottom:1px solid var(--line)}.conversation-list{height:420px;border-right:0;border-bottom:1px solid var(--line)}.detail{max-height:none}.topbar{padding:0 14px}.status{display:none}.message-stream{padding:18px}.bubble{max-width:calc(100% - 46px)}}