:root {
  color-scheme: dark;
  --bg: #080b0f;
  --panel: #10161d;
  --panel-2: #151f28;
  --line: rgba(255, 255, 255, 0.1);
  --muted: #8d9aa7;
  --text: #f2f6f8;
  --green: #18c79c;
  --green-soft: rgba(24, 199, 156, 0.16);
  --red: #ff6b6b;
  --yellow: #f2c94c;
  --blue: #70a8ff;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background:
    radial-gradient(circle at 20% 0%, rgba(24, 199, 156, 0.14), transparent 34rem),
    linear-gradient(180deg, #07100e 0%, var(--bg) 34rem, #0b0e12 100%);
  color: var(--text);
  font-family: Inter, "PingFang SC", "Microsoft YaHei", Arial, sans-serif;
}

a {
  color: inherit;
  text-decoration: none;
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  height: 68px;
  padding: 0 clamp(18px, 4vw, 56px);
  background: rgba(8, 11, 15, 0.86);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(18px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  min-width: 150px;
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 34px;
  height: 34px;
  background: linear-gradient(135deg, #14d6a2, #eef7a5);
  color: #06110f;
  border-radius: 8px;
  font-weight: 800;
}

.brand strong,
.brand small {
  display: block;
  line-height: 1.05;
}

.brand small {
  margin-top: 3px;
  color: var(--muted);
  font-size: 11px;
  letter-spacing: 0.14em;
}

.nav {
  display: flex;
  gap: 24px;
  color: var(--muted);
  font-size: 14px;
}

.nav a:hover {
  color: var(--text);
}

.login-link,
.ask-row button,
.subscribe a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 40px;
  padding: 0 18px;
  border: 0;
  border-radius: 6px;
  background: var(--green);
  color: #05110e;
  font-weight: 800;
  cursor: pointer;
}

main {
  overflow: hidden;
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.02fr) minmax(360px, 0.98fr);
  gap: clamp(28px, 5vw, 70px);
  align-items: center;
  min-height: calc(100vh - 68px);
  padding: clamp(42px, 7vw, 86px) clamp(18px, 4vw, 56px) 72px;
}

.eyebrow {
  margin: 0 0 14px;
  color: var(--green);
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1 {
  max-width: 760px;
  margin-bottom: 22px;
  font-size: clamp(44px, 7vw, 92px);
  line-height: 0.94;
  letter-spacing: 0;
}

.hero-subtitle {
  max-width: 680px;
  color: #bfccd4;
  font-size: clamp(17px, 2vw, 21px);
  line-height: 1.72;
}

.ask-box {
  max-width: 720px;
  margin-top: 34px;
  padding: 18px;
  background: rgba(16, 22, 29, 0.82);
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: 0 24px 70px rgba(0, 0, 0, 0.26);
}

.ask-box label {
  display: block;
  margin-bottom: 10px;
  color: #d8e2e7;
  font-size: 13px;
  font-weight: 800;
}

.ask-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 10px;
}

.ask-row input {
  width: 100%;
  min-height: 48px;
  padding: 0 14px;
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: 6px;
  background: #070b0f;
  color: var(--text);
  font: inherit;
}

.ask-box p {
  margin: 10px 0 0;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.55;
}

.metrics {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
  max-width: 700px;
  margin-top: 24px;
}

.metrics div {
  padding: 18px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--line);
  border-radius: 8px;
}

.metrics strong {
  display: block;
  font-size: 30px;
}

.metrics span {
  color: var(--muted);
  font-size: 13px;
}

.market-board {
  position: relative;
  min-height: 610px;
  padding: 24px;
  background:
    linear-gradient(145deg, rgba(21, 31, 40, 0.96), rgba(8, 13, 18, 0.96)),
    repeating-linear-gradient(90deg, transparent 0 62px, rgba(255, 255, 255, 0.03) 62px 63px);
  border: 1px solid rgba(255, 255, 255, 0.13);
  border-radius: 8px;
  box-shadow: 0 28px 90px rgba(0, 0, 0, 0.42);
}

.board-header {
  display: flex;
  justify-content: space-between;
  gap: 18px;
  color: var(--muted);
  font-size: 13px;
}

.board-header strong {
  color: var(--text);
}

.ticker-row {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
  margin-top: 24px;
}

.ticker-row span {
  padding: 14px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--line);
  border-radius: 6px;
  color: #cdd8df;
  font-size: 13px;
}

.ticker-row b {
  display: block;
  margin-top: 7px;
  font-size: 20px;
}

.up {
  color: var(--green);
}

.down {
  color: var(--red);
}

.spotlight-question {
  margin-top: 22px;
  padding: 22px;
  background: rgba(24, 199, 156, 0.09);
  border: 1px solid rgba(24, 199, 156, 0.28);
  border-radius: 8px;
}

.spotlight-question p {
  color: var(--green);
  font-size: 13px;
  font-weight: 800;
}

.spotlight-question h2 {
  font-size: clamp(24px, 3vw, 36px);
  line-height: 1.2;
}

.spotlight-question ul {
  margin: 18px 0 0;
  padding-left: 18px;
  color: #bfd0d8;
  line-height: 1.7;
}

.chart-card {
  position: absolute;
  right: 24px;
  bottom: 24px;
  left: 24px;
  height: 190px;
  padding: 22px;
  background: #090e13;
  border: 1px solid var(--line);
  border-radius: 8px;
}

.chart-grid {
  display: flex;
  align-items: end;
  gap: 16px;
  height: 100%;
}

.chart-grid i {
  flex: 1;
  min-width: 16px;
  background: linear-gradient(180deg, var(--green), rgba(24, 199, 156, 0.16));
  border-radius: 5px 5px 0 0;
}

.risk-line {
  position: absolute;
  inset: 22px;
  pointer-events: none;
}

.risk-line span {
  position: absolute;
  right: 0;
  left: 0;
  top: 42%;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--yellow), transparent);
}

.content-band,
.options-workspace,
.split-band,
.subscribe {
  padding: 78px clamp(18px, 4vw, 56px);
}

.section-heading {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 24px;
  margin-bottom: 24px;
}

.section-heading p {
  margin-bottom: 8px;
  color: var(--green);
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.section-heading h2,
.split-band h2,
.subscribe h2 {
  margin-bottom: 0;
  font-size: clamp(30px, 4vw, 52px);
  letter-spacing: 0;
}

.section-heading a {
  color: var(--green);
  font-weight: 800;
}

.options-workspace {
  background:
    linear-gradient(180deg, rgba(15, 24, 31, 0.82), rgba(8, 11, 15, 0.98)),
    radial-gradient(circle at 80% 10%, rgba(112, 168, 255, 0.13), transparent 36rem);
  border-block: 1px solid var(--line);
}

.options-heading a {
  min-height: 38px;
  padding: 0 14px;
  border: 1px solid rgba(24, 199, 156, 0.35);
  border-radius: 6px;
  background: rgba(24, 199, 156, 0.08);
}

.options-shell {
  display: grid;
  grid-template-columns: minmax(260px, 0.32fr) minmax(0, 1fr);
  gap: 18px;
  align-items: stretch;
}

.options-brief,
.monitor-frame-wrap {
  background: rgba(16, 22, 29, 0.9);
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: 0 24px 72px rgba(0, 0, 0, 0.28);
}

.options-brief {
  padding: 24px;
}

.brief-status {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 28px;
  padding: 7px 10px;
  background: var(--green-soft);
  border: 1px solid rgba(24, 199, 156, 0.28);
  border-radius: 999px;
  color: var(--green);
  font-size: 12px;
  font-weight: 800;
}

.brief-status span {
  width: 8px;
  height: 8px;
  border-radius: 999px;
  background: var(--green);
  box-shadow: 0 0 0 5px rgba(24, 199, 156, 0.12);
}

.options-brief h3 {
  font-size: 26px;
  line-height: 1.24;
}

.options-brief p,
.options-brief dd {
  color: #aebcc6;
  line-height: 1.68;
}

.options-brief dl {
  display: grid;
  gap: 16px;
  margin: 28px 0 0;
}

.options-brief dt {
  margin-bottom: 6px;
  color: #e3ecef;
  font-weight: 800;
}

.options-brief dd {
  margin: 0;
}

.monitor-frame-wrap {
  overflow: hidden;
  min-height: 720px;
}

.frame-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 44px;
  padding: 0 14px;
  background: #0b1016;
  border-bottom: 1px solid var(--line);
  color: var(--muted);
  font-size: 13px;
}

.frame-toolbar div {
  display: flex;
  gap: 6px;
}

.frame-toolbar i {
  width: 9px;
  height: 9px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.28);
}

.frame-toolbar i:first-child {
  background: var(--red);
}

.frame-toolbar i:nth-child(2) {
  background: var(--yellow);
}

.frame-toolbar i:last-child {
  background: var(--green);
}

.monitor-frame-wrap iframe {
  display: block;
  width: 100%;
  height: 720px;
  border: 0;
  background: #070b0f;
}

.qa-grid,
.path-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.qa-card,
.path-grid article {
  min-height: 240px;
  padding: 22px;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 8px;
}

.qa-meta {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 26px;
  color: var(--muted);
  font-size: 13px;
}

.qa-meta span {
  color: var(--green);
  font-weight: 800;
}

.qa-card h3,
.path-grid h3 {
  font-size: 22px;
  line-height: 1.3;
}

.qa-card p,
.path-grid p,
.split-band p,
.subscribe p {
  color: #aebcc6;
  line-height: 1.72;
}

.split-band {
  display: grid;
  grid-template-columns: minmax(0, 0.86fr) minmax(360px, 1.14fr);
  gap: clamp(28px, 5vw, 70px);
  align-items: center;
  background: #0d1218;
  border-block: 1px solid var(--line);
}

.signal-list {
  display: grid;
  gap: 12px;
}

.signal-list div {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
  gap: 14px;
  padding: 18px;
  background: var(--panel-2);
  border: 1px solid var(--line);
  border-radius: 8px;
}

.signal-list em {
  color: #dbe6ea;
  font-style: normal;
}

.pulse {
  width: 12px;
  height: 12px;
  border-radius: 999px;
  background: var(--green);
  box-shadow: 0 0 0 6px var(--green-soft);
}

.pulse.warning {
  background: var(--yellow);
  box-shadow: 0 0 0 6px rgba(242, 201, 76, 0.14);
}

.pulse.hot {
  background: var(--red);
  box-shadow: 0 0 0 6px rgba(255, 107, 107, 0.14);
}

.path-grid span {
  display: block;
  margin-bottom: 38px;
  color: var(--green);
  font-size: 34px;
  font-weight: 800;
}

.subscribe {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 24px;
  align-items: center;
  margin: 42px clamp(18px, 4vw, 56px) 72px;
  padding: clamp(28px, 5vw, 52px);
  background: linear-gradient(135deg, rgba(24, 199, 156, 0.18), rgba(112, 168, 255, 0.1));
  border: 1px solid rgba(24, 199, 156, 0.28);
  border-radius: 8px;
}

.subscribe p {
  max-width: 760px;
  margin-bottom: 0;
}

.footer {
  display: flex;
  justify-content: space-between;
  gap: 18px;
  padding: 24px clamp(18px, 4vw, 56px);
  color: var(--muted);
  border-top: 1px solid var(--line);
}

@media (max-width: 960px) {
  .nav {
    display: none;
  }

  .hero,
  .options-shell,
  .split-band,
  .subscribe {
    grid-template-columns: 1fr;
  }

  .market-board {
    min-height: 560px;
  }

  .qa-grid,
  .path-grid {
    grid-template-columns: 1fr;
  }

  .monitor-frame-wrap {
    min-height: 640px;
  }

  .monitor-frame-wrap iframe {
    height: 640px;
  }
}

@media (max-width: 620px) {
  .topbar {
    height: 62px;
  }

  .brand {
    min-width: 0;
  }

  .ask-row,
  .metrics,
  .ticker-row {
    grid-template-columns: 1fr;
  }

  .ask-row button {
    width: 100%;
  }

  .market-board {
    min-height: 620px;
    padding: 16px;
  }

  .chart-card {
    right: 16px;
    bottom: 16px;
    left: 16px;
  }

  .section-heading,
  .footer {
    align-items: start;
    flex-direction: column;
  }

  .options-workspace {
    padding-inline: 12px;
  }

  .options-brief {
    padding: 18px;
  }

  .monitor-frame-wrap {
    min-height: 560px;
  }

  .monitor-frame-wrap iframe {
    height: 560px;
  }
}