:root{--bg: #f4f6f8;--card: #ffffff;--ink: #1a2330;--muted: #6b7280;--line: #e4e8ee;--accent: #2563eb;--user: #eef2ff;--err: #b42318;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica,Arial,sans-serif}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--ink)}.login-wrap{min-height:100vh;display:grid;place-items:center;padding:24px}.login-card{width:100%;max-width:380px;background:var(--card);border:1px solid var(--line);border-radius:16px;padding:28px;display:flex;flex-direction:column;gap:14px;box-shadow:0 8px 30px #141e320f}.login-card h1{font-size:20px;margin:0}.subtitle{margin:0;color:#6b7280;font-size:14px}.field{display:flex;flex-direction:column;gap:6px}.field label{font-size:13px;font-weight:600}.phone-row{display:flex;align-items:center;border:1px solid var(--line);border-radius:10px;overflow:hidden}.phone-prefix{padding:10px 12px;background:#f3f4f6;color:#6b7280;font-size:14px}input,textarea{font:inherit;border:1px solid var(--line);border-radius:10px;padding:10px 12px;outline:none;width:100%}.phone-row input{border:none;border-radius:0}input:focus,textarea:focus{border-color:var(--accent)}button{font:inherit;font-weight:600;border:none;border-radius:10px;padding:10px 16px;background:var(--accent);color:#fff;cursor:pointer}button:disabled{opacity:.5;cursor:default}.linklike{background:none;color:var(--accent);padding:4px;font-weight:500}.login-hint{font-size:13px;color:#047857;background:#ecfdf5;padding:8px 10px;border-radius:8px}.login-error,.chat-error{font-size:13px;color:var(--err);background:#fef3f2;padding:8px 10px;border-radius:8px}.chat-wrap{max-width:820px;margin:0 auto;height:100vh;display:flex;flex-direction:column}.chat-header{display:flex;align-items:center;justify-content:space-between;padding:14px 20px;border-bottom:1px solid var(--line);background:var(--card)}.chat-title{font-weight:700}.chat-log{flex:1;overflow-y:auto;padding:20px;display:flex;flex-direction:column;gap:16px}.empty{margin:auto;text-align:center;color:#6b7280}.suggestions{display:flex;flex-direction:column;gap:8px;margin-top:12px}.chip{background:var(--card);color:var(--ink);border:1px solid var(--line);border-radius:999px;padding:8px 14px;font-weight:500;font-size:13px;text-align:left}.msg{display:flex;flex-direction:column;gap:4px}.msg-role{font-size:12px;font-weight:700;color:#9ca3af;text-transform:uppercase;letter-spacing:.04em}.msg-body{white-space:pre-wrap;line-height:1.5;padding:12px 14px;border-radius:12px;border:1px solid var(--line);background:var(--card)}.msg.user .msg-body{background:var(--user);border-color:#dbe3ff}.thinking{color:#6b7280;font-style:italic}.markdown>:first-child{margin-top:0}.markdown>:last-child{margin-bottom:0}.markdown p{margin:0 0 10px}.markdown h1,.markdown h2,.markdown h3{font-size:15px;margin:14px 0 8px}.markdown ul,.markdown ol{margin:0 0 10px;padding-left:20px}.markdown li{margin:2px 0}.markdown table{border-collapse:collapse;width:100%;margin:6px 0 12px;font-size:13px}.markdown th,.markdown td{border:1px solid var(--line);padding:6px 10px;text-align:left}.markdown th{background:#f3f4f6;font-weight:600}.markdown tbody tr:nth-child(2n){background:#fafbfc}.markdown code{background:#f3f4f6;border-radius:4px;padding:1px 5px;font-size:12px}.markdown strong{font-weight:600}.composer{display:flex;gap:10px;padding:14px 20px;border-top:1px solid var(--line);background:var(--card)}.composer textarea{flex:1;resize:none}.composer button{align-self:flex-end}