:root{--black:#0a0a0a;--panel:#141414;--panel-2:#1c1c1c;--border:#2a2a2a;--text:#f4f4f5;--muted:#a1a1aa;--orange:#ff6a00;--orange-2:#ffb347;--orange-grad:linear-gradient(135deg,#ff6a00,#ffb347);--green:#22c55e;--red:#ef4444;--radius:14px}*{box-sizing:border-box}body,html{margin:0;padding:0;background:var(--black);color:var(--text);font-family:ui-sans-serif,system-ui,-apple-system,Segoe UI,Roboto,Noto Sans SC,PingFang SC,Microsoft YaHei,sans-serif;-webkit-font-smoothing:antialiased}a{color:var(--orange-2);text-decoration:none}.wrap{max-width:880px;margin:0 auto;padding:24px}.wrap.wide{max-width:1100px}.assistant-layout{display:flex;gap:16px;align-items:flex-start}.history{width:230px;flex-shrink:0;position:-webkit-sticky;position:sticky;top:16px}.history-list{margin-top:12px;display:flex;flex-direction:column;gap:4px;max-height:60vh;overflow-y:auto}.history-item{display:flex;align-items:center;justify-content:space-between;gap:6px;padding:9px 11px;border-radius:9px;cursor:pointer;font-size:13px;color:var(--muted);border:1px solid transparent}.history-item.active,.history-item:hover{background:var(--panel-2)}.history-item.active{border-color:var(--orange);color:var(--text)}.history-title{white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.history-del{opacity:0;font-size:12px;flex-shrink:0}.history-item:hover .history-del{opacity:.6}.history-del:hover{opacity:1!important;color:var(--red)}.assistant-layout .chat-card{flex:1 1;min-width:0}@media (max-width:760px){.assistant-layout{flex-direction:column}.history{width:100%;position:static}.history-list{flex-direction:row;flex-wrap:wrap;max-height:none}}.center-screen{min-height:100vh;justify-content:center;padding:24px}.brand,.center-screen{display:flex;align-items:center}.brand{gap:12px}.brand .otter{font-size:30px;filter:drop-shadow(0 2px 8px rgba(255,106,0,.5))}.brand h1{font-size:20px;margin:0;font-weight:800;letter-spacing:-.02em}.brand 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20px;font-size:14px;font-weight:700;font-family:inherit;transition:transform .08s,opacity .15s}.btn:active{transform:translateY(1px)}.btn:disabled{opacity:.5;cursor:not-allowed}.btn-primary{background:var(--orange-grad);color:#1a0c00}.btn-ghost{background:var(--panel-2);color:var(--text);border:1px solid var(--border)}.btn-row{display:flex;gap:12px;margin-top:22px}.btn-row .spacer{flex:1 1}.steps{display:flex;gap:8px;margin-bottom:20px;flex-wrap:wrap}.steps .dot{flex:1 1;min-width:90px;height:6px;border-radius:99px;background:var(--border)}.steps .dot.active{background:var(--orange-grad)}.steps .dot.done{background:var(--orange)}.tpl-grid{display:grid;grid-template-columns:1fr 1fr;grid-gap:14px;gap:14px}@media (max-width:640px){.tpl-grid{grid-template-columns:1fr}}.tpl{border:1.5px solid var(--border);background:var(--panel-2);border-radius:var(--radius);padding:18px;cursor:pointer;transition:border-color .15s,transform .08s}.tpl:hover{transform:translateY(-2px)}.tpl.selected{border-color:var(--orange);box-shadow:0 0 0 3px rgba(255,106,0,.18)}.tpl h3{margin:0 0 6px;font-size:16px}.tpl .stats{font-size:12px;margin-top:10px}.pass,.tpl .stats{color:var(--muted)}.pass{display:flex;align-items:center;gap:12px;padding:12px 0;border-bottom:1px solid var(--border)}.pass:last-child{border-bottom:none}.pass.active{color:var(--text)}.pass.done{color:var(--green)}.pass .ic{width:22px;text-align:center}.spinner{width:16px;height:16px;border:2px solid var(--border);border-top-color:var(--orange);border-radius:50%;animation:spin .8s linear infinite;display:inline-block}@keyframes spin{to{transform:rotate(1turn)}}.muted{color:var(--muted)}.err,.muted{font-size:13px}.err{color:var(--red);margin-top:10px}.ok{color:var(--green);font-size:13px}.badge{display:inline-block;background:var(--panel-2);border:1px solid var(--border);border-radius:99px;padding:3px 10px;font-size:12px;color:var(--muted)}.topbar{display:flex;align-items:center;justify-content:space-between;margin-bottom:24px}.lang-toggle{display:flex;gap:6px}.lang-toggle button{background:var(--panel-2);border:1px solid var(--border);color:var(--muted);border-radius:8px;padding:5px 10px;cursor:pointer;font-size:12px;font-weight:700}.lang-toggle button.active{background:var(--orange-grad);color:#1a0c00;border-color:transparent}table{width:100%;border-collapse:collapse;font-size:13px}td,th{text-align:left;padding:10px 8px;border-bottom:1px solid var(--border)}th{color:var(--muted);font-weight:600}.file-list{margin-top:8px}.file-list,.hint{font-size:12px;color:var(--muted)}.hint{margin-top:4px}.demo-banner{background:rgba(255,106,0,.12);border:1px solid var(--orange);color:var(--orange-2);border-radius:10px;padding:10px 14px;font-size:13px;font-weight:600;margin-bottom:16px}.mode-tabs{display:flex;gap:8px;margin-bottom:18px}.mode-tabs button{flex:1 1;background:var(--panel);border:1px solid var(--border);color:var(--muted);border-radius:11px;padding:11px 14px;font-size:14px;font-weight:700;font-family:inherit;cursor:pointer;transition:border-color .15s,color .15s}.mode-tabs button.active{border-color:var(--orange);color:var(--text);background:var(--panel-2);box-shadow:0 0 0 2px rgba(255,106,0,.15)}.chat-card{padding:16px}.chat-card,.chat-stream{display:flex;flex-direction:column}.chat-stream{min-height:320px;max-height:56vh;overflow-y:auto;padding:6px 4px;gap:12px}.chat-empty{text-align:center;margin:auto;padding:32px 0}.bubble-row{display:flex}.bubble-row.user{justify-content:flex-end}.bubble-row.assistant{justify-content:flex-start}.bubble{max-width:80%;border-radius:14px;padding:10px 14px;font-size:14px;line-height:1.5}.bubble.user{background:var(--orange-grad);color:#1a0c00;border-bottom-right-radius:4px;font-weight:600}.bubble.assistant{background:var(--panel-2);border:1px solid var(--border);border-bottom-left-radius:4px}.bubble-text{white-space:pre-wrap;word-break:break-word}.flow-chip{margin-top:10px;padding:10px;background:rgba(34,197,94,.1);border:1px solid var(--green);border-radius:10px;font-size:12px;color:var(--green);display:flex;flex-direction:column;align-items:flex-start;gap:2px}.composer{display:flex;gap:8px;align-items:flex-end;border-top:1px solid var(--border);padding-top:12px;margin-top:8px}.composer-input{flex:1 1;min-height:44px;max-height:160px;resize:vertical}.attach-btn{cursor:pointer;font-size:20px;padding:8px;margin:0;border:1px solid var(--border);border-radius:10px;background:var(--panel-2);align-self:flex-end;line-height:1}.composer-meta{margin-top:8px;flex-wrap:wrap}.composer-meta,.site-footer{display:flex;align-items:center;gap:8px}.site-footer{justify-content:center;color:var(--muted);font-size:12px;padding:28px 0 12px}.site-footer .dot{opacity:.5}