:root{color-scheme:light;--bg: #f4f7f5;--panel: #ffffff;--ink: #12231c;--muted: #5f7369;--line: #d7e3dc;--teal: #0f766e;--teal-dark: #115e59;--soft: #e7f5ef;--danger: #b42318;--ok: #067647;font-family:Segoe UI,PingFang SC,Microsoft YaHei,sans-serif}*{box-sizing:border-box}html,body,#root{height:100%;margin:0}body{background:linear-gradient(180deg,#eef6f2 0%,var(--bg) 40%,#eef2f4 100%);color:var(--ink)}.app{max-width:1280px;margin:0 auto;padding:24px 16px 40px;min-height:100%;display:grid;grid-template-rows:auto 1fr;gap:16px}.header{display:flex;justify-content:space-between;gap:16px;align-items:flex-start}.site-brand{display:flex;align-items:flex-start;gap:12px;min-width:0}.brand-logo{width:40px;height:40px;object-fit:contain;flex-shrink:0;border-radius:10px;background:#fff;box-shadow:0 2px 8px #115e591f}.header h1{margin:0 0 6px;font-size:24px;letter-spacing:.02em}.header p{margin:0;color:var(--muted);font-size:14px;line-height:1.5}.header-tools{display:flex;flex-wrap:wrap;align-items:center;justify-content:flex-end;gap:10px}.lang-switch{display:inline-flex;align-items:center;gap:8px;background:#fff;border:1px solid var(--line);border-radius:999px;padding:6px 10px 6px 12px;font-size:12px;color:var(--muted);white-space:nowrap}.lang-switch select{border:none;background:transparent;color:var(--teal-dark);font-weight:600;font-size:12px;cursor:pointer;outline:none}.badge{background:var(--soft);color:var(--teal-dark);border:1px solid #b7ddd0;border-radius:999px;padding:8px 12px;font-size:12px;white-space:nowrap}.layout{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1.05fr);gap:16px;min-height:0}@media(max-width:920px){.layout{grid-template-columns:1fr}}.card{background:var(--panel);border:1px solid var(--line);border-radius:18px;box-shadow:0 10px 30px #115e590f;overflow:hidden;min-height:560px;display:flex;flex-direction:column}.card-hd{padding:14px 16px;background:var(--teal-dark);color:#fff;display:flex;justify-content:space-between;align-items:center}.card-hd h2{margin:0;font-size:15px;font-weight:700}.card-hd span{font-size:12px;opacity:.85}.chat{flex:1;overflow:auto;padding:16px;display:flex;flex-direction:column;gap:12px;background:linear-gradient(180deg,#fbfdfc,#f7faf8)}.bubble{max-width:92%;padding:12px 14px;border-radius:14px;line-height:1.55;font-size:14px;white-space:pre-wrap}.bubble.bot{align-self:flex-start;background:#eef7f3;border:1px solid #d3e8df}.bubble.user{align-self:flex-end;background:#12352f;color:#f4fffb}.progress{margin-top:8px;height:8px;background:#dce8e2;border-radius:999px;overflow:hidden}.progress>i{display:block;height:100%;background:linear-gradient(90deg,#0f766e,#14b8a6);width:0%;transition:width .35s ease}.composer{border-top:1px solid var(--line);padding:12px;display:grid;gap:10px;background:#fff}.drop{border:1.5px dashed #9fbfb3;border-radius:14px;padding:18px;text-align:center;color:var(--muted);background:#f8fcfa;cursor:pointer}.drop.drag{border-color:var(--teal);background:#eaf8f3;color:var(--teal-dark)}.drop strong{color:var(--ink)}.row{display:flex;gap:8px;align-items:center}button,.btn{-webkit-appearance:none;-moz-appearance:none;appearance:none;border:0;border-radius:10px;background:var(--teal);color:#fff;font-weight:650;padding:10px 14px;cursor:pointer}button.secondary{background:#e8f1ed;color:var(--teal-dark)}button:disabled{opacity:.55;cursor:not-allowed}.file-name{font-size:12px;color:var(--muted);overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.preview{padding:14px;overflow:auto;flex:1;display:grid;gap:12px;align-content:start}.empty{color:var(--muted);font-size:14px;line-height:1.6;padding:20px 8px}.brand{display:block;border:1px solid var(--line);border-radius:14px;padding:14px 16px;background:#fff;min-width:0}.brand h3{margin:0 0 6px;font-size:17px;line-height:1.35;word-break:normal;overflow-wrap:anywhere}.meta{color:var(--muted);font-size:12px;line-height:1.5;margin-bottom:10px;overflow-wrap:anywhere}.brand p{margin:0 0 10px;font-size:14px;line-height:1.65;overflow-wrap:anywhere;white-space:normal}.tags{display:flex;flex-wrap:wrap;gap:6px}.tag{font-size:12px;line-height:1.4;background:#f3e8ef;color:#9d174d;border-radius:999px;padding:5px 10px;max-width:100%;overflow-wrap:anywhere}.err{color:var(--danger)}.ok{color:var(--ok)}.push-tip{margin-top:10px;padding:10px 12px;border-radius:10px;font-size:13px;line-height:1.45}.push-tip.ok{background:#ecfdf3;border:1px solid #abefc6;color:var(--ok)}.push-tip.bad{background:#fef3f2;border:1px solid #fecdca;color:var(--danger)}