: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;color-scheme:dark}:root[data-theme=light]{--black:#faf8f5;--panel:#fff;--panel-2:#f3f2ef;--border:#e3e0d9;--text:#1a1a1a;--muted:#6b6b70;color-scheme:light}*{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 .brand-logo{height:40px;width:auto;max-width:140px;object-fit:contain;display:block}.brand h1{font-size:20px;margin:0;font-weight:800;letter-spacing:-.02em}.brand .tag{font-size:12px;color:var(--orange-2);font-weight:600;margin:0}.grad-text{background:var(--orange-grad);-webkit-background-clip:text;background-clip:text;color:transparent}.card{background:var(--panel);border:1px solid var(--border);border-radius:var(--radius);padding:24px}.card+.card{margin-top:16px}label{display:block;font-size:13px;color:var(--muted);margin:14px 0 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.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}.theme-toggle{background:var(--panel-2);border:1px solid 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var(--border);background:var(--panel);color:var(--text);font-size:15px;cursor:pointer;box-shadow:0 2px 10px rgba(0,0,0,.4)}.pp-close:hover{border-color:var(--orange)}.phone-preview-wrap{margin-top:4px}.phone-preview{max-width:380px;margin:0 auto;background:#0b141a;border:1px solid var(--border);border-radius:18px;overflow:hidden}.pp-header{display:flex;align-items:center;gap:10px;padding:10px 14px;background:#17242e;color:#e9edef;font-size:13px}.pp-header i{display:block;font-style:normal;font-size:11px;color:#22c55e}.pp-avatar{width:34px;height:34px;border-radius:50%;background:var(--orange-grad);display:flex;align-items:center;justify-content:center;font-size:16px}.pp-body{padding:14px 12px;display:flex;flex-direction:column;gap:8px;max-height:420px;overflow-y:auto;background:#0b141a}.pp-bubble{max-width:82%;padding:8px 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18px}input[type=email],input[type=password],input[type=tel],input[type=text],select,textarea{font-size:16px}.tpl-grid{gap:10px}.chat-stream{max-height:50vh}.bubble{max-width:90%}.composer-meta{font-size:11px}table{font-size:12px}}.success-card{text-align:center;max-width:360px;width:100%;animation:pop-in .25s ease-out}@keyframes pop-in{0%{transform:scale(.94);opacity:0}to{transform:scale(1);opacity:1}}.success-check{display:flex;justify-content:center;margin-bottom:4px}.sc-circle{stroke:var(--green);stroke-width:3;stroke-dasharray:151;stroke-dashoffset:151;animation:sc-draw .5s ease-out forwards}.sc-tick{stroke:var(--green);stroke-width:4;stroke-linecap:round;stroke-linejoin:round;stroke-dasharray:40;stroke-dashoffset:40;animation:sc-draw .35s ease-out .45s forwards}@keyframes sc-draw{to{stroke-dashoffset:0}}.demo-banner{background:rgba(255,106,0,.12);border:1px solid var(--orange);color:var(--orange-2);border-radius:10px;padding:10px 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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}