:root{
  --navy:#0d1b3e; --navy2:#16284f; --blue:#1d4ed8; --blue-soft:#e7eefc;
  --accent:#0ea5a4; --gold:#c79a3a; --ink:#1a2233; --muted:#5b6678;
  --line:#e3e7ef; --bg:#f5f7fb; --white:#fff; --good:#0e9f6e;
  --shadow:0 10px 30px rgba(13,27,62,.10);
}
*{box-sizing:border-box}
html,body{margin:0;padding:0}
body{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
  color:var(--ink);background:var(--bg);line-height:1.5}
a{color:var(--blue);text-decoration:none}
.wrap{max-width:1180px;margin:0 auto;padding:0 20px}

/* Header */
header.top{background:linear-gradient(120deg,var(--navy),var(--navy2));color:#fff}
.top-inner{display:flex;align-items:center;justify-content:space-between;padding:14px 20px;max-width:1180px;margin:0 auto}
.brand{display:flex;align-items:center;gap:13px}
.brand .mark{width:42px;height:42px;border-radius:10px;background:linear-gradient(135deg,var(--accent),var(--blue));
  display:flex;align-items:center;justify-content:center;font-weight:800;font-size:18px;letter-spacing:.5px}
.brand h1{font-size:16px;margin:0;line-height:1.15;font-weight:700}
.brand small{display:block;font-weight:400;color:#aebbdc;font-size:11.5px;letter-spacing:.3px}
.top-cta{font-size:13px;color:#cfe0ff;border:1px solid #34467a;padding:8px 14px;border-radius:8px;cursor:pointer;background:transparent}
.top-cta:hover{background:#1c2d57}

/* Hero */
.hero{background:linear-gradient(120deg,var(--navy),var(--navy2));color:#fff;padding:26px 0 70px}
.hero h2{font-size:30px;margin:6px 0 8px;font-weight:800;letter-spacing:-.5px}
.hero p{color:#c3cfe8;max-width:640px;margin:0;font-size:15px}
.badge{display:inline-block;background:rgba(199,154,58,.18);color:#f0d79a;border:1px solid rgba(199,154,58,.4);
  font-size:11.5px;padding:4px 11px;border-radius:20px;letter-spacing:.4px;text-transform:uppercase;font-weight:700}

/* Layout */
.main{margin-top:-44px;padding-bottom:50px}
.grid{display:grid;grid-template-columns:1fr 330px;gap:22px;align-items:start}
@media(max-width:920px){.grid{grid-template-columns:1fr}}

.card{background:var(--white);border:1px solid var(--line);border-radius:16px;box-shadow:var(--shadow)}

/* Chat */
.chat{display:flex;flex-direction:column;height:600px;overflow:hidden}
.chat-head{padding:15px 20px;border-bottom:1px solid var(--line);display:flex;align-items:center;gap:11px}
.chat-head .dot{width:9px;height:9px;border-radius:50%;background:var(--good);box-shadow:0 0 0 4px rgba(14,159,110,.15)}
.chat-head strong{font-size:14.5px}
.chat-head span{font-size:12px;color:var(--muted)}
.stream{flex:1;overflow-y:auto;padding:20px;display:flex;flex-direction:column;gap:16px;background:#fbfcfe}
.msg{display:flex;gap:11px;max-width:88%}
.msg .av{width:30px;height:30px;border-radius:8px;flex:none;display:flex;align-items:center;justify-content:center;
  font-size:12px;font-weight:800;color:#fff}
.msg.bot .av{background:linear-gradient(135deg,var(--accent),var(--blue))}
.msg.user{align-self:flex-end;flex-direction:row-reverse}
.msg.user .av{background:#334;color:#fff}
.bubble{padding:12px 15px;border-radius:13px;font-size:14px}
.msg.bot .bubble{background:var(--white);border:1px solid var(--line);border-top-left-radius:4px}
.msg.user .bubble{background:var(--blue);color:#fff;border-top-right-radius:4px}
.bubble h4{margin:2px 0 7px;font-size:14px;color:var(--navy)}
.bubble p{margin:0 0 9px}
.bubble ul{margin:6px 0 9px;padding-left:18px}
.bubble li{margin:3px 0}
.cite{margin-top:10px;font-size:11.5px;color:var(--muted);border-top:1px dashed var(--line);padding-top:8px}
.cite b{color:var(--accent)}
.helpcta{margin-top:11px;background:var(--blue-soft);border:1px solid #cfe0ff;border-radius:10px;padding:10px 12px;font-size:12.5px}
.helpcta b{color:var(--navy)}
.helpcta a{font-weight:700;cursor:pointer}

.typing span{display:inline-block;width:7px;height:7px;border-radius:50%;background:#b6c0d6;margin-right:3px;animation:bounce 1.2s infinite}
.typing span:nth-child(2){animation-delay:.15s}.typing span:nth-child(3){animation-delay:.3s}
@keyframes bounce{0%,60%,100%{transform:translateY(0);opacity:.5}30%{transform:translateY(-5px);opacity:1}}

.suggest{padding:12px 16px;border-top:1px solid var(--line);display:flex;gap:8px;flex-wrap:wrap;background:#fff}
.chip{font-size:12.5px;border:1px solid var(--line);background:#fff;border-radius:20px;padding:7px 13px;cursor:pointer;color:var(--ink);transition:.15s}
.chip:hover{border-color:var(--blue);background:var(--blue-soft);color:var(--navy)}

.inputbar{padding:13px 16px;border-top:1px solid var(--line);display:flex;gap:10px;background:#fff}
.inputbar input{flex:1;border:1px solid var(--line);border-radius:10px;padding:12px 14px;font-size:14px;outline:none}
.inputbar input:focus{border-color:var(--blue);box-shadow:0 0 0 3px var(--blue-soft)}
.send{background:var(--blue);color:#fff;border:none;border-radius:10px;padding:0 18px;font-weight:700;cursor:pointer;font-size:14px}
.send:hover{background:#1842c0}

/* Sidebar */
.side .card{padding:18px;margin-bottom:18px}
.side h3{margin:0 0 4px;font-size:14px;color:var(--navy)}
.side .sub{font-size:12px;color:var(--muted);margin-bottom:13px}
.explore button{width:100%;text-align:left;border:1px solid var(--line);background:#fff;border-radius:10px;
  padding:11px 13px;margin-bottom:9px;cursor:pointer;display:flex;align-items:center;gap:10px;font-size:13px;transition:.15s}
.explore button:hover{border-color:var(--accent);background:#f0fbfb}
.explore .ic{width:26px;height:26px;border-radius:7px;flex:none;display:flex;align-items:center;justify-content:center;
  font-weight:800;font-size:12px;color:#fff;background:linear-gradient(135deg,var(--accent),var(--blue))}
.explore .ttl{font-weight:600}.explore .cnt{color:var(--muted);font-size:11.5px}

.leadbox{background:linear-gradient(135deg,var(--navy),var(--navy2));color:#fff;border:none}
.leadbox h3{color:#fff}.leadbox .sub{color:#aebbdc}
.leadbox input{width:100%;border:1px solid #34467a;background:#1a2c54;color:#fff;border-radius:9px;padding:11px 12px;margin-bottom:9px;font-size:13px;outline:none}
.leadbox input::placeholder{color:#8597bf}
.leadbox button.lead{width:100%;background:var(--gold);color:#23170a;border:none;border-radius:9px;padding:12px;font-weight:800;cursor:pointer;font-size:13.5px}
.leadbox button.lead:hover{background:#d8aa48}
.leadok{font-size:13px;color:#bdf0d8;text-align:center;padding:8px 0}

/* Modal */
.modal{position:fixed;inset:0;background:rgba(8,15,35,.55);display:none;align-items:center;justify-content:center;padding:20px;z-index:50}
.modal.open{display:flex}
.sheet{background:#fff;border-radius:16px;max-width:620px;width:100%;max-height:85vh;overflow-y:auto;box-shadow:0 30px 80px rgba(0,0,0,.4)}
.sheet-head{padding:18px 22px;border-bottom:1px solid var(--line);display:flex;justify-content:space-between;align-items:center;position:sticky;top:0;background:#fff}
.sheet-head h3{margin:0;color:var(--navy);font-size:17px}
.x{border:none;background:#f0f2f7;width:30px;height:30px;border-radius:8px;cursor:pointer;font-size:16px;color:#556}
.sheet-body{padding:20px 22px}
.row{display:flex;gap:13px;padding:12px;border:1px solid var(--line);border-radius:11px;margin-bottom:10px}
.row .num{width:30px;height:30px;border-radius:8px;flex:none;background:linear-gradient(135deg,var(--accent),var(--blue));
  color:#fff;font-weight:800;display:flex;align-items:center;justify-content:center;font-size:13px}
.row .rt{font-weight:700;color:var(--navy);font-size:14px}
.row .rd{font-size:12.5px;color:var(--muted);margin-top:2px}
.ask-this{margin-top:7px;font-size:12px;color:var(--blue);cursor:pointer;font-weight:600}

footer{background:var(--navy);color:#9fb0d4;font-size:12px;padding:22px 0;text-align:center}
footer .demo{display:inline-block;background:rgba(199,154,58,.15);color:#e8cd92;border:1px solid rgba(199,154,58,.35);
  padding:5px 12px;border-radius:20px;margin-bottom:9px;font-size:11.5px}
footer a{color:#cfe0ff}