/* X-Ray Index design system — tokens from DESIGN.md (Resend-style: black canvas,
   editorial serif display, white primary CTA, translucent hairlines, atmospheric glows). */
:root {
  --primary: #fcfdff;
  --primary-on: #000000;
  --primary-pressed: #f1f7fe;
  --ink: #fcfdff;
  --body: rgba(252, 253, 255, 0.86);
  --charcoal: rgba(252, 253, 255, 0.7);
  --mute: #a1a4a5;
  --ash: #888e90;
  --stone: #464a4d;
  --canvas: #000000;
  --surface-card: #0a0a0c;
  --surface-elevated: #101012;
  --surface-deep: #06060a;
  --hairline: rgba(255, 255, 255, 0.06);
  --hairline-strong: rgba(255, 255, 255, 0.14);
  --divider-soft: rgba(255, 255, 255, 0.04);
  --orange: #ff801f; --orange-glow: rgba(255, 89, 0, 0.22);
  --yellow: #ffc53d;
  --blue: #3b9eff; --blue-glow: rgba(0, 117, 255, 0.34);
  --green: #11ff99; --green-glow: rgba(34, 255, 153, 0.18);
  --red: #ff2047; --red-glow: rgba(255, 32, 71, 0.34);

  --display: "Instrument Serif", "Tiempos Headline", Georgia, serif;
  --favorit: Geist, "Inter Tight", Inter, sans-serif;
  --ui: Inter, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --mono: "Geist Mono", ui-monospace, SFMono-Regular, monospace;

  --r-sm: 6px; --r-md: 8px; --r-lg: 12px; --r-xl: 16px; --r-full: 9999px;
  --container: 1200px;
}

* { box-sizing: border-box; }
html, body { margin: 0; }
body {
  background: var(--canvas); color: var(--body);
  font: 400 16px/1.5 var(--favorit);
  -webkit-font-smoothing: antialiased; text-rendering: optimizeLegibility;
}
a { color: inherit; }
img, svg { display: block; }
.container { max-width: var(--container); margin: 0 auto; padding: 0 32px; }

/* ── Type ── */
.display-xxl, .display-xl {
  font-family: var(--display); font-weight: 400; line-height: 1; color: var(--ink);
  font-feature-settings: "ss01", "liga"; margin: 0;
}
.display-xxl { font-size: 96px; letter-spacing: -0.96px; }
.display-xl { font-size: 76.8px; letter-spacing: -0.768px; }
.display-lg { font: 400 56px/1.2 var(--favorit); letter-spacing: -2.8px; color: var(--ink); margin: 0; }
.heading-md { font: 500 24px/1.5 var(--ui); letter-spacing: -0.4px; color: var(--ink); margin: 0; }
.heading-sm { font: 500 20px/1.3 var(--ui); letter-spacing: -0.3px; color: var(--ink); margin: 0; }
.subtitle { font: 400 20px/1.4 var(--favorit); color: var(--charcoal); margin: 0; }
.body-lg { font-size: 18px; line-height: 1.5; color: var(--body); }
.body-sm { font: 400 14px/1.43 var(--ui); color: var(--mute); }
.caption { font: 400 12px/1.5 var(--ui); color: var(--ash); }
.eyebrow { font: 500 13px/1 var(--mono); letter-spacing: 0.5px; color: var(--mute);
  text-transform: uppercase; margin: 0 0 20px; }
.mono { font-family: var(--mono); }
.text-link { color: var(--blue); text-decoration: none; font: 500 14px/1.43 var(--favorit);
  letter-spacing: 0.35px; }
.text-link:hover { text-decoration: underline; }

/* ── Buttons ── */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  height: 36px; padding: 8px 16px; border-radius: var(--r-md);
  font: 500 14px/1.43 var(--ui); text-decoration: none; cursor: pointer;
  border: 1px solid transparent; white-space: nowrap; transition: background .15s, border-color .15s;
}
.btn-primary { background: var(--primary); color: var(--primary-on); }
.btn-primary:hover { background: #e9edf2; }
.btn-primary:active { background: var(--primary-pressed); }
.btn-ghost { background: var(--surface-elevated); color: var(--ink); border-color: var(--hairline-strong); }
.btn-ghost:hover { border-color: rgba(255, 255, 255, 0.28); }
.btn-outline { background: var(--canvas); color: var(--ink); border-color: var(--hairline-strong); }
.btn-outline:hover { background: var(--surface-card); }
.btn-lg { height: 44px; padding: 10px 20px; font-size: 15px; }
.btn-block { width: 100%; }
.btn[disabled] { opacity: 0.5; cursor: not-allowed; }

/* ── Nav ── */
.nav { position: sticky; top: 0; z-index: 50; height: 64px;
  background: rgba(0, 0, 0, 0.78); backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--hairline); }
.nav-inner { height: 100%; display: flex; align-items: center; gap: 32px; }
.logo { display: flex; align-items: center; gap: 10px; text-decoration: none; color: var(--ink);
  font: 500 17px/1 var(--ui); letter-spacing: -0.3px; }
.logo svg { width: 22px; height: 22px; }
.nav-links { display: flex; gap: 24px; }
.nav-links a { text-decoration: none; color: var(--charcoal); font: 500 14px/1.43 var(--favorit);
  letter-spacing: 0.35px; }
.nav-links a:hover, .nav-links a.active { color: var(--ink); }
.nav-right { margin-left: auto; display: flex; align-items: center; gap: 16px; }
.nav-right .signin { color: var(--charcoal); text-decoration: none; font: 500 14px/1 var(--ui); }
.nav-right .signin:hover { color: var(--ink); }
.nav-burger { display: none; margin-left: auto; background: none; border: 0; color: var(--ink);
  cursor: pointer; padding: 6px; }

/* ── Sections & glows ── */
.section { position: relative; padding: 96px 0; overflow: hidden; }
.section-tight { padding: 64px 0; }
.glow::before {
  content: ""; position: absolute; left: 50%; top: -280px; width: 1100px; height: 640px;
  transform: translateX(-50%); pointer-events: none; z-index: 0;
  background: radial-gradient(closest-side, var(--glow, var(--blue-glow)), transparent);
  opacity: 0.55;
}
.glow-orange { --glow: var(--orange-glow); }
.glow-blue { --glow: var(--blue-glow); }
.glow-green { --glow: var(--green-glow); }
.glow-red { --glow: var(--red-glow); }
.section > .container { position: relative; z-index: 1; }
.section-head { max-width: 760px; margin-bottom: 56px; }
.section-head.center { margin-left: auto; margin-right: auto; text-align: center; }
.section-head p { margin-top: 20px; }
.rule { border: 0; border-top: 1px solid var(--hairline); margin: 0; }

/* ── Hero ── */
.hero { padding: 128px 0 96px; text-align: center; }
.hero .display-xxl { max-width: 980px; margin: 0 auto; }
.hero .subtitle { max-width: 640px; margin: 28px auto 0; }
.hero-cta { display: flex; justify-content: center; gap: 12px; margin-top: 40px; flex-wrap: wrap; }
.hero-note { margin-top: 16px; }

/* ── Cards ── */
.grid { display: grid; gap: 16px; }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }
.card { background: var(--surface-card); border: 1px solid var(--hairline-strong);
  border-radius: var(--r-lg); padding: 32px; }
.card-plain { border-color: var(--hairline); }
.card h3 { margin: 0 0 10px; }
.card p { margin: 0; color: var(--mute); font: 400 15px/1.55 var(--ui); }
.card .icon { width: 36px; height: 36px; border-radius: var(--r-md); margin-bottom: 24px;
  display: grid; place-items: center; background: var(--surface-elevated);
  border: 1px solid var(--hairline-strong); color: var(--ink); }

.stat-card { background: var(--surface-card); border: 1px solid var(--hairline-strong);
  border-radius: var(--r-lg); padding: 24px 28px; }
.stat-card .k { font: 500 12px/1.4 var(--mono); letter-spacing: 0.5px; text-transform: uppercase;
  color: var(--ash); }
.stat-card .v { margin-top: 12px; font: 400 44px/1 var(--favorit); letter-spacing: -1.6px;
  color: var(--ink); }
.stat-card .v small { font-size: 18px; letter-spacing: -0.3px; color: var(--mute); margin-left: 6px; }
.stat-card .d { margin-top: 10px; font: 400 13px/1.45 var(--ui); color: var(--mute); }

/* ── Product window (code-window shell around the chart) ── */
.window { background: var(--surface-deep); border: 1px solid var(--hairline-strong);
  border-radius: var(--r-lg); overflow: hidden; }
.window-bar { display: flex; align-items: center; gap: 8px; height: 40px; padding: 0 16px;
  border-bottom: 1px solid var(--hairline); }
.window-bar i { width: 10px; height: 10px; border-radius: 50%; display: block; }
.window-bar i:nth-child(1) { background: var(--red); }
.window-bar i:nth-child(2) { background: var(--yellow); }
.window-bar i:nth-child(3) { background: var(--green); }
.window-bar span { margin-left: 12px; font: 400 12px/1 var(--mono); color: var(--ash); }
.window-body { padding: 16px; }

/* ── Pills, tabs ── */
.pill { display: inline-flex; align-items: center; gap: 6px; padding: 4px 10px;
  border-radius: var(--r-full); background: var(--surface-elevated); color: var(--body);
  border: 1px solid var(--hairline); font: 400 12px/1.5 var(--ui); }
.dot { width: 8px; height: 8px; border-radius: 50%; display: inline-block; background: var(--green); }
.segmented { display: inline-flex; padding: 3px; border-radius: var(--r-md);
  background: var(--surface-card); border: 1px solid var(--hairline-strong); }
.segmented button { border: 0; background: transparent; color: var(--mute); cursor: pointer;
  padding: 6px 14px; border-radius: var(--r-sm); font: 500 13px/1.4 var(--ui); }
.segmented button.active { background: var(--surface-elevated); color: var(--ink);
  box-shadow: inset 0 0 0 1px var(--hairline-strong); }
.segmented .save { color: var(--green); margin-left: 4px; }

/* ── Pricing ── */
.pricing { display: grid; grid-template-columns: repeat(2, minmax(0, 420px)); gap: 16px;
  justify-content: center; }
.tier { background: var(--surface-card); border: 1px solid var(--hairline-strong);
  border-radius: var(--r-lg); padding: 32px; display: flex; flex-direction: column; }
.tier.featured { background: var(--surface-elevated); position: relative; }
.tier.featured::after { content: ""; position: absolute; inset: -1px; border-radius: var(--r-lg);
  pointer-events: none; border: 1px solid rgba(255, 255, 255, 0.22); }
.tier-head { display: flex; justify-content: space-between; align-items: center; }
.tier .price { margin: 24px 0 4px; display: flex; align-items: baseline; gap: 6px; }
.tier .price .display-lg { font-size: 56px; }
.tier .price .per { color: var(--mute); font: 400 15px/1 var(--ui); }
.tier .crypto { color: var(--mute); font: 400 13px/1.5 var(--ui); min-height: 20px; }
.tier .crypto b { color: var(--green); font-weight: 500; }
.tier ul { list-style: none; padding: 0; margin: 28px 0 32px; display: grid; gap: 12px;
  font: 400 14px/1.5 var(--ui); color: var(--body); }
.tier li { display: flex; gap: 10px; }
.tier li::before { content: ""; flex: none; width: 16px; height: 16px; margin-top: 2px;
  background: no-repeat center/12px url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23fcfdff' stroke-width='2.5' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M20 6 9 17l-5-5'/%3E%3C/svg%3E"); }
.tier .actions { margin-top: auto; display: grid; gap: 10px; }

/* ── Tables ── */
.table-wrap { overflow-x: auto; border: 1px solid var(--hairline-strong); border-radius: var(--r-lg);
  background: var(--surface-card); }
table.data { width: 100%; border-collapse: collapse; font: 400 14px/1.4 var(--ui); }
table.data th, table.data td { padding: 14px 20px; text-align: right; white-space: nowrap; }
table.data th:first-child, table.data td:first-child { text-align: left; }
table.data thead th { font: 500 12px/1.4 var(--mono); letter-spacing: 0.4px; text-transform: uppercase;
  color: var(--ash); border-bottom: 1px solid var(--hairline-strong); background: var(--surface-deep); }
table.data tbody td { border-bottom: 1px solid var(--hairline); color: var(--body); }
table.data tbody tr:last-child td { border-bottom: 0; }
table.data td.num { font-family: var(--mono); font-size: 13px; }
.pos { color: var(--green); } .neg { color: var(--red); } .muted { color: var(--ash); }

/* ── Forms ── */
.field { display: grid; gap: 8px; }
.field label { font: 500 13px/1.4 var(--ui); color: var(--charcoal); }
.input { height: 40px; padding: 10px 14px; border-radius: var(--r-md); width: 100%;
  background: var(--surface-card); border: 1px solid var(--hairline-strong); color: var(--ink);
  font: 400 14px/1.43 var(--ui); outline: none; }
.input:focus { border-color: var(--ink); }
.divider-text { display: flex; align-items: center; gap: 12px; color: var(--ash);
  font: 400 12px/1 var(--ui); }
.divider-text::before, .divider-text::after { content: ""; flex: 1; border-top: 1px solid var(--hairline-strong); }
.notice { border: 1px solid var(--hairline-strong); background: var(--surface-elevated);
  border-radius: var(--r-md); padding: 12px 14px; font: 400 13px/1.5 var(--ui); color: var(--charcoal); }

/* ── FAQ ── */
.faq { max-width: 820px; margin: 0 auto; border-top: 1px solid var(--hairline); }
.faq details { border-bottom: 1px solid var(--hairline); padding: 22px 4px; }
.faq summary { cursor: pointer; list-style: none; display: flex; justify-content: space-between;
  gap: 24px; font: 500 17px/1.4 var(--ui); color: var(--ink); }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; color: var(--mute); font-weight: 400; }
.faq details[open] summary::after { content: "–"; }
.faq details p { margin: 14px 0 0; color: var(--mute); font: 400 15px/1.6 var(--ui); max-width: 700px; }

/* ── Footer ── */
.footer { border-top: 1px solid var(--hairline); padding: 64px 0 40px; color: var(--charcoal);
  font: 400 14px/1.43 var(--ui); }
.footer-grid { display: grid; grid-template-columns: 2fr repeat(3, 1fr); gap: 32px; }
.footer h4 { margin: 0 0 16px; font: 500 13px/1 var(--ui); color: var(--ink); }
.footer ul { list-style: none; padding: 0; margin: 0; display: grid; gap: 10px; }
.footer a { text-decoration: none; color: var(--ash); }
.footer a:hover { color: var(--ink); }
.footer-bottom { margin-top: 56px; padding-top: 24px; border-top: 1px solid var(--divider-soft);
  display: flex; justify-content: space-between; gap: 24px; flex-wrap: wrap; }
.disclaimer { max-width: 760px; color: var(--ash); font: 400 12px/1.6 var(--ui); }

/* ── Responsive ── */
@media (max-width: 1023px) {
  .grid-3, .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .pricing { grid-template-columns: minmax(0, 520px); }
  .nav-links, .nav-right { display: none; }
  .nav-burger { display: block; }
  .nav.open { height: auto; }
  .nav.open .nav-inner { flex-wrap: wrap; padding-top: 14px; padding-bottom: 16px; row-gap: 16px; }
  .nav.open .nav-links { display: flex; flex-direction: column; width: 100%; order: 3; }
  .nav.open .nav-right { display: flex; width: 100%; order: 4; margin-left: 0; }
  .display-xxl { font-size: 76px; }
  .display-xl { font-size: 56px; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 767px) {
  .container { padding: 0 16px; }
  .grid-3, .grid-2, .grid-4 { grid-template-columns: 1fr; }
  .section { padding: 64px 0; }
  .hero { padding: 80px 0 64px; }
  .display-xxl { font-size: 56px; letter-spacing: -0.5px; }
  .display-xl { font-size: 44px; }
  .display-lg { font-size: 40px; letter-spacing: -1.6px; }
  .card, .tier { padding: 24px; }
  .btn { height: 44px; }
  .input { height: 48px; }
}
@media (max-width: 425px) {
  .display-xxl { font-size: 44px; }
}

/* ── Chart legend ── */
.legend { list-style: none; margin: 0; padding: 0; display: flex; gap: 18px; flex-wrap: wrap;
  font: 400 12px/1.4 var(--ui); color: var(--mute); }
.legend li { display: flex; align-items: center; gap: 7px; }
.legend .sw { width: 14px; height: 10px; border-radius: 3px; display: inline-block; }
.legend .tri { width: 0; height: 0; display: inline-block;
  border-left: 5px solid transparent; border-right: 5px solid transparent; }
.legend .tri.up { border-bottom: 9px solid #1fdd8a; }
.legend .tri.down { border-top: 9px solid #ff3b5c; }
.legend .star { font-style: normal; color: var(--orange); font-size: 13px; }
.chart { width: 100%; height: 720px; }
.chart-sm { height: 520px; }

/* ── Dashboard ── */
.app-head { display: flex; justify-content: space-between; align-items: flex-end; gap: 32px;
  flex-wrap: wrap; padding: 48px 0 32px; }
.app-head .display-xl { font-size: 64px; }
.quote { margin-top: 14px; font: 400 18px/1 var(--mono); color: var(--ink); display: flex; gap: 14px;
  align-items: baseline; flex-wrap: wrap; }
.quote .date { color: var(--ash); font-size: 13px; }
.app-stats { display: grid; grid-template-columns: repeat(3, minmax(140px, 1fr)); gap: 12px; }
.app-stats .stat-card { padding: 18px 20px; }
.app-stats .stat-card .v { font-size: 30px; letter-spacing: -1px; }
.phase { display: inline-flex; align-items: center; gap: 8px; }
.phase .dot { width: 8px; height: 8px; }
.phase.exit .dot { background: var(--red); }
.phase.none .dot { background: var(--stone); }
.picker { display: grid; gap: 14px; padding-bottom: 24px; }
.chips { display: flex; gap: 8px; flex-wrap: wrap; }
.chip { height: 32px; padding: 0 14px; border-radius: var(--r-full); cursor: pointer;
  background: var(--canvas); color: var(--charcoal); border: 1px solid var(--hairline-strong);
  font: 500 13px/1 var(--ui); }
.chip:hover { color: var(--ink); border-color: rgba(255, 255, 255, 0.28); }
.chip.active { background: var(--primary); color: var(--primary-on); border-color: var(--primary); }
.panel-head { display: flex; justify-content: space-between; align-items: center; gap: 16px;
  flex-wrap: wrap; padding: 4px 4px 12px; }

/* ── Account ── */
.account-grid { display: grid; grid-template-columns: 1fr; gap: 16px; padding-bottom: 96px; }
.kv { display: grid; grid-template-columns: 160px 1fr; gap: 12px 24px; margin: 24px 0 28px;
  font: 400 14px/1.5 var(--ui); }
.kv dt { color: var(--ash); } .kv dd { margin: 0; color: var(--ink); }
.row-actions { display: flex; gap: 10px; flex-wrap: wrap; }
.matrix td, .matrix th { padding: 10px 16px; }
.matrix td:not(:first-child), .matrix th:not(:first-child) { text-align: center; }
.matrix tr.group td { background: var(--surface-deep); color: var(--ash);
  font: 500 11px/1 var(--mono); letter-spacing: 0.5px; text-transform: uppercase; }
.matrix input[type=checkbox] { width: 16px; height: 16px; accent-color: #fcfdff; cursor: pointer; }
.matrix th button { background: none; border: 0; color: inherit; font: inherit; cursor: pointer;
  text-transform: inherit; letter-spacing: inherit; }
.matrix th button:hover { color: var(--ink); }
.locked { position: relative; }
.locked .table-wrap { filter: blur(3px); opacity: 0.35; pointer-events: none; max-height: 320px; overflow: hidden; }
.locked .unlock { position: absolute; inset: 0; display: grid; place-content: center; gap: 14px;
  background: radial-gradient(closest-side, rgba(10,10,12,.96) 40%, rgba(10,10,12,.55));
  text-align: center; }
.dev-panel { border: 1px dashed var(--hairline-strong); border-radius: var(--r-lg); padding: 20px 24px;
  display: flex; gap: 12px; align-items: center; flex-wrap: wrap; }

/* ── Auth ── */
.auth { min-height: calc(100vh - 64px); display: grid; place-items: center; padding: 64px 16px; }
.auth-card { width: 100%; max-width: 400px; display: grid; gap: 20px; }
.auth-card .logo { justify-content: center; }
.auth-card h1 { text-align: center; font-size: 44px; }

/* ── Email mockup (white inset) ── */
.email { background: #fff; color: #000; border-radius: var(--r-lg); max-width: 520px; width: 100%;
  font: 400 14px/1.55 var(--ui); overflow: hidden; }
.email-head { padding: 18px 24px; border-bottom: 1px solid #eceef0; color: rgba(0, 0, 51, 0.7);
  font-size: 12px; display: grid; gap: 2px; }
.email-head b { color: #000; font-weight: 500; }
.email-body { padding: 24px; }
.email-body h4 { margin: 0 0 14px; font: 500 18px/1.3 var(--ui); }
.email-body table { width: 100%; border-collapse: collapse; font-size: 13px; }
.email-body td, .email-body th { padding: 9px 0; border-bottom: 1px solid #eceef0; text-align: left; }
.email-body th { color: rgba(0, 0, 51, 0.6); font-weight: 500; font-size: 11px; text-transform: uppercase;
  letter-spacing: 0.4px; }
.tag { display: inline-block; padding: 2px 8px; border-radius: 999px; font-size: 11px; font-weight: 500; }
.tag.buy { background: #e3fbef; color: #037a44; } .tag.sell { background: #ffe8ec; color: #b4002a; }
.tag.risk-buy { background: #dff8fc; color: #0e7490; } .tag.risk-sell { background: #fff1e0; color: #b45309; }
.tag.trim { background: #f3e8ff; color: #7e22ce; }
.split { display: grid; grid-template-columns: 1fr 1fr; gap: 64px; align-items: center; }
.list-check { list-style: none; padding: 0; margin: 28px 0 0; display: grid; gap: 14px; }
.list-check li { display: flex; gap: 12px; color: var(--body); font: 400 15px/1.5 var(--ui); }
.list-check li span.k { color: var(--ink); font-weight: 500; }
.coverage { display: flex; flex-wrap: wrap; gap: 8px; }
.prose { max-width: 760px; }
.prose h2 { margin: 48px 0 12px; }
.prose p, .prose li { color: var(--body); font: 400 16px/1.7 var(--favorit); }

@media (max-width: 1023px) {
  .split { grid-template-columns: 1fr; gap: 40px; }
  .app-stats { grid-template-columns: repeat(2, 1fr); width: 100%; }
}
@media (max-width: 767px) {
  .chart { height: 600px; } .chart-sm { height: 460px; }
  .app-head .display-xl { font-size: 48px; }
  .kv { grid-template-columns: 1fr; gap: 4px; }
  .kv dd { margin-bottom: 10px; }
}

/* 卡片里的要点列表：标签与正文同一行自然换行（三栏时太窄，不能用左右两列）。 */
.card .list-check li { display: block; }

/* 图例悬停说明 */
.legend li[data-tip] { position: relative; cursor: help; }
.legend li[data-tip]::after {
  content: attr(data-tip); position: absolute; left: 0; top: calc(100% + 8px); z-index: 20;
  width: 240px; padding: 10px 12px; border-radius: var(--r-md); pointer-events: none;
  background: var(--surface-elevated); border: 1px solid var(--hairline-strong);
  color: var(--body); font: 400 12px/1.45 var(--ui); white-space: normal;
  opacity: 0; transform: translateY(-4px); transition: opacity .12s, transform .12s;
}
.legend li[data-tip]:hover::after, .legend li[data-tip]:focus::after { opacity: 1; transform: none; }
.legend li[data-tip]:nth-last-child(-n+2)::after { left: auto; right: 0; }