:root {
  color-scheme: dark;
  --bg: #120d0a;
  --bg-elevated: rgba(29, 20, 16, 0.78);
  --bg-soft: rgba(255, 243, 229, 0.08);
  --line: rgba(255, 239, 216, 0.14);
  --line-strong: rgba(255, 227, 184, 0.36);
  --text: #fff7ef;
  --muted: #d9c2ac;
  --accent: #f3bd6d;
  --accent-strong: #df8b47;
  --shadow: 0 30px 70px rgba(0, 0, 0, 0.42);
  --display-font: "Iowan Old Style", "Palatino Linotype", "Book Antiqua", "Songti SC", serif;
  --body-font: "Avenir Next", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-width: 320px;
  color: var(--text);
  font-family: var(--body-font);
  background:
    radial-gradient(circle at top left, rgba(243, 189, 109, 0.18), transparent 28%),
    radial-gradient(circle at 85% 12%, rgba(220, 120, 77, 0.18), transparent 22%),
    linear-gradient(180deg, #1a120e 0%, #120d0a 40%, #100b09 100%);
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.015) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.015) 1px, transparent 1px);
  background-size: 32px 32px;
  mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.9), transparent 88%);
  opacity: 0.55;
}

a {
  color: inherit;
}

img,
video {
  display: block;
  max-width: 100%;
}

.page-shell {
  width: min(1240px, calc(100vw - 40px));
  margin: 0 auto;
  padding: 24px 0 56px;
}

.topbar {
  position: sticky;
  top: 16px;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 12px 16px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(18, 13, 10, 0.68);
  backdrop-filter: blur(20px);
  box-shadow: var(--shadow);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  font-weight: 700;
  letter-spacing: 0.03em;
}

.brand img {
  width: 38px;
  height: 38px;
  border-radius: 12px;
  box-shadow: 0 10px 20px rgba(0, 0, 0, 0.28);
}

.topnav {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 20px;
}

.topnav a {
  color: var(--muted);
  text-decoration: none;
  font-size: 14px;
}

.topnav a:hover,
.topnav a:focus-visible,
.button:hover,
.button:focus-visible {
  color: var(--text);
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(420px, 0.9fr);
  gap: 36px;
  align-items: center;
  padding: 72px 0 54px;
}

.hero-copy {
  display: flex;
  flex-direction: column;
  justify-content: center;
  min-height: 720px;
  padding: 56px 0;
}

.eyebrow,
.section-tag,
.mini-label {
  margin: 0;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.22em;
  font-size: 11px;
}

.hero-copy h1,
.section-head h2,
.cta-copy h2,
.ui-panel h2 {
  margin: 0;
  font-family: var(--display-font);
  letter-spacing: -0.05em;
}

.hero-copy h1 {
  margin-top: 18px;
  font-size: clamp(48px, 7vw, 88px);
  line-height: 0.95;
  max-width: 12ch;
}

.lede {
  max-width: 62ch;
  margin: 30px 0 0;
  color: var(--muted);
  font-size: 18px;
  line-height: 1.75;
}

.hero-actions,
.cta-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 42px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 50px;
  padding: 0 22px;
  border-radius: 999px;
  text-decoration: none;
  font-weight: 700;
  font-family: inherit;
  font-size: 16px;
  cursor: pointer;
  transition: transform 180ms ease, border-color 180ms ease, background-color 180ms ease, color 180ms ease;
}

.button:hover,
.button:focus-visible {
  transform: translateY(-1px);
}

.button-primary {
  background: linear-gradient(135deg, var(--accent), var(--accent-strong));
  color: #22150c;
}

.button-secondary {
  border: 1px solid var(--line-strong);
  background: rgba(255, 243, 229, 0.03);
  color: var(--text);
}

.button.button-primary + .button.button-primary {
  background: rgba(255, 243, 229, 0.05);
  border: 1px solid var(--line-strong);
  color: var(--text);
}

.hero-metrics {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
  margin: 56px 0 0;
}

.hero-metrics div,
.feature-card,
.platform-card,
.cta-section,
.stage-card {
  border: 1px solid var(--line);
  background: var(--bg-elevated);
  backdrop-filter: blur(18px);
  box-shadow: var(--shadow);
}

.hero-metrics div {
  min-height: 182px;
  padding: 24px 20px 22px;
  border-radius: 22px;
}

.hero-metrics dt {
  color: var(--muted);
  font-size: 12px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.hero-metrics dd {
  margin: 18px 0 0;
  font-family: var(--display-font);
  font-size: 28px;
  line-height: 1.14;
  letter-spacing: -0.04em;
}

.hero-metrics dd br {
  display: none;
}

.hero-stage {
  position: relative;
  min-height: 720px;
}

.stage-card {
  position: absolute;
  border-radius: 30px;
  overflow: hidden;
}

.stage-card-video {
  inset: 0 48px 84px 0;
}

.stage-card-head {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 14px 16px;
  background: rgba(0, 0, 0, 0.18);
  border-bottom: 1px solid var(--line);
}

.stage-card-head p {
  margin: 0 0 0 4px;
  color: var(--muted);
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.12em;
}

.stage-dot {
  width: 8px;
  height: 8px;
  border-radius: 999px;
  background: rgba(255, 247, 239, 0.45);
}

.cat-demo {
  width: 100%;
  height: calc(100% - 51px);
  object-fit: contain;
  background:
    radial-gradient(circle at center, rgba(243, 189, 109, 0.12), transparent 46%),
    linear-gradient(180deg, rgba(25, 19, 15, 0.72), rgba(13, 10, 8, 0.92));
}

.stage-card-note {
  right: 0;
  bottom: 188px;
  width: 230px;
  padding: 20px 22px;
  transform: rotate(4deg);
}

.stage-card-note p:last-child {
  margin: 12px 0 0;
  font-family: var(--display-font);
  font-size: 28px;
  line-height: 1.08;
  letter-spacing: -0.04em;
}

.stage-card-ui {
  right: 12px;
  bottom: 0;
  width: min(84%, 380px);
  padding: 18px;
}

.ui-chip-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.ui-chip {
  display: inline-flex;
  align-items: center;
  min-height: 32px;
  padding: 0 12px;
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  color: var(--muted);
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.12em;
}

.ui-panel {
  margin-top: 16px;
  padding: 18px;
  border-radius: 22px;
  background: rgba(255, 243, 229, 0.04);
}

.ui-panel h2 {
  margin-top: 8px;
  font-size: clamp(28px, 5vw, 40px);
  line-height: 0.95;
}

.ui-divider {
  height: 1px;
  margin: 16px 0;
  background: var(--line);
}

.ui-panel ul {
  margin: 0;
  padding-left: 18px;
  color: var(--muted);
  line-height: 1.8;
}

.download-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.25fr) repeat(2, minmax(0, 1fr));
  gap: 18px;
}

.feature-card,
.download-card,
.cta-section {
  border-radius: 28px;
}

.feature-section,
.download-section {
  padding-top: 88px;
}

.section-head {
  display: grid;
  gap: 10px;
  margin-bottom: 24px;
}

.section-head h2,
.cta-copy h2 {
  font-size: clamp(34px, 4.8vw, 58px);
  line-height: 0.98;
  max-width: 12ch;
}

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

.feature-card,
.download-card {
  padding: 22px;
}

.feature-card h3,
.download-card h3 {
  margin: 0;
  font-size: 22px;
  letter-spacing: -0.03em;
}

.feature-card p,
.download-card p,
.cta-copy p,
.footer p {
  margin: 12px 0 0;
  color: var(--muted);
  line-height: 1.8;
}

.download-card {
  border: 1px solid var(--line);
  background: var(--bg-elevated);
  backdrop-filter: blur(18px);
  box-shadow: var(--shadow);
}

.download-card-primary {
  background:
    radial-gradient(circle at top right, rgba(243, 189, 109, 0.18), transparent 34%),
    rgba(29, 20, 16, 0.88);
}

.download-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 22px;
}

.download-list {
  margin: 14px 0 0;
  padding-left: 18px;
  color: var(--muted);
  line-height: 1.9;
}

.download-list a {
  color: var(--text);
  text-decoration-color: rgba(255, 247, 239, 0.34);
  text-underline-offset: 3px;
}

.download-note {
  margin-top: 16px;
}

.cta-section {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 24px;
  align-items: center;
  margin-top: 88px;
  padding: 30px;
  background:
    radial-gradient(circle at top right, rgba(243, 189, 109, 0.18), transparent 28%),
    rgba(29, 20, 16, 0.92);
}

.footer {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 10px 24px;
  padding: 30px 4px 0;
}

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

.contact-modal[hidden] {
  display: none;
}

.contact-modal {
  position: fixed;
  inset: 0;
  z-index: 30;
}

.contact-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(10, 7, 5, 0.72);
  backdrop-filter: blur(8px);
}

.contact-dialog {
  position: relative;
  z-index: 1;
  width: min(480px, calc(100vw - 24px));
  margin: min(8vh, 60px) auto;
  padding: 22px;
  border: 1px solid var(--line-strong);
  border-radius: 28px;
  background: rgba(29, 20, 16, 0.96);
  box-shadow: var(--shadow);
}

.contact-close {
  position: absolute;
  top: 12px;
  right: 12px;
  width: 40px;
  height: 40px;
  border: 0;
  border-radius: 999px;
  background: rgba(255, 243, 229, 0.08);
  color: var(--text);
  font: inherit;
  font-size: 24px;
  cursor: pointer;
}

.contact-dialog h2 {
  margin: 12px 0 0;
  font-family: var(--display-font);
  font-size: clamp(30px, 6vw, 42px);
  letter-spacing: -0.04em;
}

.contact-copy {
  margin: 10px 0 0;
  color: var(--muted);
  line-height: 1.7;
}

.contact-image {
  margin-top: 18px;
  width: 100%;
  border-radius: 22px;
  background: #ffffff;
}

@media (max-width: 1100px) {
  .hero {
    grid-template-columns: 1fr;
  }

  .hero-copy {
    min-height: auto;
    padding: 0;
  }

  .hero-stage {
    min-height: 640px;
  }

  .feature-grid {
    grid-template-columns: 1fr;
  }

  .download-grid {
    grid-template-columns: 1fr;
  }

  .cta-section {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 760px) {
  .page-shell {
    width: min(100vw - 24px, 1240px);
    padding-top: 14px;
  }

  .topbar {
    position: static;
    flex-direction: column;
    align-items: flex-start;
    border-radius: 28px;
  }

  .topnav {
    gap: 14px;
    justify-content: flex-start;
  }

  .hero {
    gap: 24px;
    padding-top: 42px;
  }

  .hero-copy {
    min-height: auto;
    padding: 0;
  }

  .hero-copy h1 {
    max-width: none;
    font-size: clamp(40px, 15vw, 64px);
  }

  .hero-metrics,
  .feature-grid,
  .download-grid {
    grid-template-columns: 1fr;
  }

  .hero-stage {
    min-height: 520px;
  }

  .stage-card-video {
    inset: 0 0 132px 0;
  }

  .stage-card-note {
    right: auto;
    left: 12px;
    bottom: 168px;
    width: min(78%, 260px);
    transform: rotate(-3deg);
  }

  .stage-card-note p:last-child {
    font-size: 24px;
  }

  .stage-card-ui {
    right: 0;
    left: 32px;
    width: auto;
  }

  .section-head h2,
  .cta-copy h2 {
    max-width: none;
    font-size: clamp(30px, 9vw, 46px);
  }

  .cta-section {
    margin-top: 68px;
    padding: 22px;
  }

  .contact-dialog {
    padding: 18px;
  }

  .footer {
    padding-bottom: 18px;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  .button {
    transition: none;
  }
}