/* AEX Open — 纸面研究台式公开产品 */
:root {
  --ink: #16140f;
  --muted: #6b6458;
  --paper: #f3efe6;
  --sheet: #faf7f1;
  --line: rgba(22, 20, 15, 0.12);
  --accent: #c4543a;
  --accent-2: #8a4b32;
  --gold: #a67c52;
  --ok: #3d6b4f;
  --warn: #9a6b2f;
  --max: 1120px;
  --sans: "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --serif: "Iowan Old Style", "Songti SC", "Noto Serif SC", "SimSun", serif;
}
* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  font-family: var(--sans);
  color: var(--ink);
  background: var(--paper);
  line-height: 1.55;
  min-height: 100%;
}
a { color: inherit; }
button, input, textarea, select { font-family: inherit; }
.wrap { width: min(var(--max), calc(100% - 40px)); margin: 0 auto; }
.nav {
  display: flex; align-items: center; justify-content: space-between;
  padding: 18px 0; border-bottom: 1px solid var(--line);
}
.brand { display: flex; gap: 10px; align-items: center; text-decoration: none; }
.brand svg { width: 28px; height: 28px; }
.brand b { font-weight: 650; letter-spacing: 0.04em; }
.brand small { display: block; color: var(--muted); font-size: 11px; letter-spacing: 0.12em; }
.nav-links { display: flex; gap: 18px; align-items: center; font-size: 14px; }
.nav-links a { text-decoration: none; color: var(--muted); }
.nav-links a:hover, .nav-links a.active { color: var(--ink); }
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  border: 1px solid var(--ink); background: var(--ink); color: var(--sheet);
  padding: 9px 14px; text-decoration: none; font-size: 13px; cursor: pointer;
}
.btn.ghost { background: transparent; color: var(--ink); }
.btn.accent { background: var(--accent); border-color: var(--accent); color: #fff; }
.btn:disabled { opacity: 0.45; cursor: not-allowed; }
.hero { padding: 72px 0 48px; display: grid; grid-template-columns: 1.2fr 0.8fr; gap: 48px; align-items: end; }
.hero h1 { font-family: var(--serif); font-size: clamp(36px, 6vw, 64px); line-height: 1.08; font-weight: 500; margin: 0 0 18px; }
.lede { font-size: 17px; color: var(--muted); max-width: 46ch; }
.hero-card {
  background: var(--sheet); border: 1px solid var(--line); padding: 22px;
}
.kicker { font-size: 11px; letter-spacing: 0.16em; text-transform: uppercase; color: var(--gold); }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.card { background: var(--sheet); border: 1px solid var(--line); padding: 20px; }
.card h3 { margin: 8px 0 8px; font-size: 18px; font-weight: 600; }
.card p { margin: 0; color: var(--muted); font-size: 14px; }
.section { padding: 28px 0 56px; }
.section h2 { font-family: var(--serif); font-size: 32px; font-weight: 500; margin: 0 0 18px; }
.plans { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; }
.plan { border: 1px solid var(--line); background: var(--sheet); padding: 20px; display: flex; flex-direction: column; gap: 8px; min-height: 280px; }
.plan.hi { border-color: var(--accent); }
.plan .price { font-size: 22px; }
.plan ul { margin: 0; padding-left: 18px; color: var(--muted); font-size: 13px; flex: 1; }
.foot { border-top: 1px solid var(--line); padding: 28px 0 48px; color: var(--muted); font-size: 13px; display: flex; justify-content: space-between; gap: 24px; }
.foot a { color: var(--muted); }
.badge { display: inline-block; font-size: 10px; letter-spacing: 0.14em; border: 1px solid var(--line); padding: 2px 6px; }
.table { width: 100%; border-collapse: collapse; font-size: 13px; }
.table th, .table td { text-align: left; padding: 10px 8px; border-bottom: 1px solid var(--line); }
.input, textarea, select {
  width: 100%; border: 1px solid var(--line); background: #fff; color: var(--ink);
  padding: 10px 12px; font-size: 14px;
}
textarea { min-height: 88px; resize: vertical; }
.row { display: flex; gap: 10px; }
.muted { color: var(--muted); }
.err { color: var(--accent); font-size: 13px; }
.ok { color: var(--ok); }
.app-shell { min-height: 100vh; display: grid; grid-template-columns: 240px 1fr 340px; }
.side, .rail { background: var(--sheet); border-right: 1px solid var(--line); padding: 16px; }
.rail { border-right: none; border-left: 1px solid var(--line); }
.main { display: flex; flex-direction: column; min-width: 0; }
.msgs { flex: 1; overflow: auto; padding: 20px; }
.msg { margin: 0 0 16px; max-width: 72ch; }
.msg.assistant { color: var(--ink); }
.msg.user { color: var(--muted); }
.composer { padding: 12px 16px 20px; border-top: 1px solid var(--line); }
.console-shell { min-height: 100vh; display: grid; grid-template-columns: 220px 1fr; }
.console-main { padding: 28px 32px 64px; background: #fff; }
.mono { font-family: ui-monospace, Consolas, monospace; font-size: 12px; }
.hidden { display: none !important; }
.drawer-btn { display: none; }
@media (max-width: 960px) {
  .hero, .grid-3, .plans, .app-shell, .console-shell { grid-template-columns: 1fr; }
  .nav-links { display: none; }
  .nav-links.open { display: flex; flex-direction: column; position: absolute; top: 58px; right: 16px; background: var(--sheet); border: 1px solid var(--line); padding: 12px; z-index: 20; }
  .drawer-btn { display: inline-flex; }
  .app-shell .side, .app-shell .rail { border: none; }
  .foot { flex-direction: column; }
}