:root {
  --bg: #f7f3eb;
  --bg-soft: #fffaf2;
  --card: #ffffff;
  --card-warm: #fff7ec;
  --text: #241f17;
  --muted: #71675a;
  --line: rgba(36, 31, 23, 0.1);
  --blue: #1e9bff;
  --blue-strong: #0f84eb;
  --orange: #ffb257;
  --orange-soft: #fff0d6;
  --shadow: 0 20px 50px rgba(64, 47, 25, 0.08);
  --radius-xl: 36px;
  --radius-lg: 28px;
  --radius-md: 18px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: "Segoe UI Variable Display", "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at top center, rgba(255, 213, 146, 0.22), transparent 24%),
    linear-gradient(180deg, #fbf7f0 0%, var(--bg) 100%);
}

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

button {
  font: inherit;
  border: 0;
  cursor: pointer;
}

.section {
  width: min(1180px, calc(100% - 48px));
  margin: 0 auto;
}

.topbar {
  padding-top: 16px;
}

.topbar-shell {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 16px 0;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 14px;
}

.brand-mark {
  width: 42px;
  height: 42px;
  display: inline-flex;
  flex: 0 0 42px;
}

.brand-mark svg {
  width: 42px;
  height: 42px;
  display: block;
  border-radius: 12px;
  box-shadow: 0 10px 22px rgba(64, 47, 25, 0.14);
}

.brand-copy strong,
.brand-copy span {
  display: block;
}

.brand-copy strong {
  font-size: 18px;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.brand-copy span {
  margin-top: 2px;
  color: var(--muted);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.nav {
  display: inline-flex;
  align-items: center;
  gap: 28px;
  color: var(--muted);
  font-size: 15px;
}

.nav a {
  transition: color 160ms ease;
}

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

.ghost-btn,
.primary-btn,
.secondary-btn,
.download-btn,
.outline-btn {
  border-radius: 999px;
  transition: transform 180ms ease, filter 180ms ease, box-shadow 180ms ease;
}

.ghost-btn:hover,
.primary-btn:hover,
.secondary-btn:hover,
.download-btn:hover,
.outline-btn:hover {
  transform: translateY(-2px);
  filter: brightness(1.02);
}

.ghost-btn {
  min-width: 108px;
  padding: 12px 18px;
  background: rgba(36, 31, 23, 0.05);
  color: var(--text);
  box-shadow: inset 0 0 0 1px rgba(36, 31, 23, 0.06);
}

.primary-btn,
.secondary-btn,
.download-btn,
.outline-btn {
  min-width: 152px;
  padding: 15px 24px;
  font-weight: 700;
}

.primary-btn,
.download-btn {
  background: linear-gradient(180deg, var(--blue) 0%, var(--blue-strong) 100%);
  color: #fff;
  box-shadow: 0 18px 36px rgba(15, 132, 235, 0.22);
}

.secondary-btn,
.outline-btn {
  background: rgba(36, 31, 23, 0.04);
  color: var(--text);
  box-shadow: inset 0 0 0 1px rgba(36, 31, 23, 0.08);
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(420px, 0.92fr);
  gap: 36px;
  align-items: center;
  padding: 56px 0 36px;
}

.eyebrow,
.section-tag {
  margin: 0;
  color: #c87818;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.hero h1 {
  margin: 18px 0 0;
  font-size: clamp(46px, 6.5vw, 82px);
  line-height: 1;
  letter-spacing: 0;
  font-family: "Microsoft YaHei", "PingFang SC", "Segoe UI Variable Display", "Segoe UI", sans-serif;
}

.hero h1 span {
  display: block;
  margin-top: 14px;
  color: #4d4031;
  font-size: clamp(24px, 3.2vw, 40px);
  line-height: 1.08;
  letter-spacing: 0;
  font-family: "Microsoft YaHei", "PingFang SC", "Segoe UI Variable Display", "Segoe UI", sans-serif;
}

.hero-desc {
  max-width: 660px;
  margin: 26px 0 0;
  color: var(--muted);
  font-size: 17px;
  line-height: 1.8;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 28px;
}

.hero-note {
  margin: 18px 0 0;
  color: #8b7c69;
  font-size: 14px;
}

.hero-stage {
  padding: 26px;
  border-radius: var(--radius-xl);
  background: linear-gradient(180deg, #fff8ee 0%, #fff3e2 100%);
  box-shadow:
    inset 0 0 0 1px rgba(255, 178, 87, 0.24),
    var(--shadow);
}

.hero-stage-head {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.mini-badge {
  display: inline-flex;
  padding: 8px 12px;
  border-radius: 999px;
  background: rgba(36, 31, 23, 0.05);
  color: #8b7c69;
  font-size: 12px;
  font-weight: 700;
}

.mini-badge.hot {
  background: var(--orange-soft);
  color: #bb6d0d;
}

.hero-stage-panel {
  margin-top: 18px;
  padding: 24px;
  border-radius: 24px;
  background: #fff;
  box-shadow: inset 0 0 0 1px rgba(36, 31, 23, 0.06);
}

.hero-stage-copy h2 {
  margin: 0;
  font-size: clamp(28px, 3vw, 40px);
  line-height: 1.08;
  letter-spacing: 0;
}

.hero-stage-copy p {
  margin: 14px 0 0;
  color: var(--muted);
  font-size: 15px;
  line-height: 1.7;
}

.hero-stage-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 18px;
}

.hero-stage-tags span {
  padding: 10px 14px;
  border-radius: 999px;
  background: rgba(36, 31, 23, 0.05);
  color: #7f7264;
  font-size: 13px;
}

.download-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
  margin-top: 16px;
}

.download-tile {
  padding: 22px;
  border-radius: 24px;
  background: #fff;
  box-shadow: inset 0 0 0 1px rgba(36, 31, 23, 0.06);
}

.download-tile.windows {
  background: linear-gradient(180deg, #eef7ff 0%, #e6f3ff 100%);
}

.download-tile.updates {
  background: linear-gradient(180deg, #fffaf2 0%, #fff5e8 100%);
}

.tile-badge {
  display: inline-flex;
  padding: 7px 12px;
  border-radius: 999px;
  background: rgba(15, 132, 235, 0.12);
  color: var(--blue-strong);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.tile-badge.warm {
  background: rgba(255, 178, 87, 0.2);
  color: #b86a07;
}

.download-tile h3 {
  margin: 18px 0 12px;
  font-size: 24px;
  line-height: 1.08;
  letter-spacing: -0.04em;
}

.download-tile p {
  margin: 0;
  color: var(--muted);
  font-size: 15px;
  line-height: 1.7;
}

.tile-note {
  margin-top: 18px;
  color: #8b7c69;
  font-size: 14px;
  font-weight: 600;
}

.summary {
  padding: 24px 0 38px;
}

.summary-shell {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 24px;
  padding: 26px 28px;
  border-radius: 28px;
  background: rgba(255, 255, 255, 0.64);
  box-shadow: inset 0 0 0 1px rgba(36, 31, 23, 0.06);
}

.summary-shell strong,
.scene-rail strong {
  display: block;
}

.summary-shell strong {
  font-size: 18px;
  letter-spacing: -0.03em;
}

.summary-shell span {
  display: block;
  margin-top: 8px;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.7;
}

.feature-band {
  padding: 88px 0;
  background: linear-gradient(180deg, #fffaf2 0%, #fff6ec 100%);
  border-top: 1px solid rgba(36, 31, 23, 0.04);
  border-bottom: 1px solid rgba(36, 31, 23, 0.04);
}

.feature-layout {
  display: grid;
  grid-template-columns: minmax(0, 0.92fr) minmax(0, 1.08fr);
  gap: 42px;
}

.feature-heading h2,
.formats-copy h2,
.scene-copy h2,
.cta h2 {
  margin: 16px 0 0;
  font-size: clamp(32px, 4vw, 56px);
  line-height: 1.04;
  letter-spacing: 0;
}

.feature-list {
  display: grid;
  gap: 0;
}

.feature-row {
  padding: 24px 0;
  border-bottom: 1px solid rgba(36, 31, 23, 0.1);
}

.feature-row-head {
  display: grid;
  grid-template-columns: 56px minmax(0, 1fr);
  gap: 18px;
  align-items: baseline;
}

.feature-row-head span {
  color: rgba(36, 31, 23, 0.28);
  font-size: 28px;
  font-weight: 700;
  letter-spacing: -0.03em;
}

.feature-row-head h3 {
  margin: 0;
  font-size: clamp(22px, 2.5vw, 32px);
  line-height: 1.06;
  letter-spacing: 0;
}

.feature-row p {
  margin: 14px 0 0 74px;
  color: var(--muted);
  font-size: 15px;
  line-height: 1.75;
}

.formats {
  padding: 96px 0;
}

.formats-copy {
  max-width: 760px;
}

.formats-copy p:last-child,
.scene-copy p,
.cta p {
  margin: 18px 0 0;
  color: var(--muted);
  font-size: 17px;
  line-height: 1.78;
}

.formats-list {
  margin-top: 34px;
}

.format-row {
  display: grid;
  grid-template-columns: 120px minmax(180px, 280px) minmax(0, 1fr);
  gap: 24px;
  align-items: center;
  padding: 26px 0;
  border-bottom: 1px solid rgba(36, 31, 23, 0.1);
}

.format-row span {
  color: #b77a1b;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.format-row strong {
  font-size: 28px;
  font-weight: 700;
  letter-spacing: 0;
}

.format-row p {
  margin: 0;
  color: var(--muted);
  font-size: 15px;
  line-height: 1.72;
}

.scene-band {
  padding: 88px 0;
  background: var(--bg-soft);
}

.scene-shell {
  display: grid;
  grid-template-columns: minmax(0, 0.88fr) minmax(0, 1.12fr);
  gap: 42px;
}

.scene-rail {
  display: grid;
  gap: 16px;
}

.scene-rail article {
  padding: 22px 24px;
  border-radius: 22px;
  background: #fff;
  box-shadow: inset 0 0 0 1px rgba(36, 31, 23, 0.06);
}

.scene-rail strong {
  font-size: 20px;
  letter-spacing: 0;
}

.scene-rail span {
  display: block;
  margin-top: 8px;
  color: var(--muted);
  font-size: 15px;
  line-height: 1.72;
}

.cta {
  padding: 100px 0 110px;
  text-align: center;
}

.cta h2 {
  max-width: 900px;
  margin-left: auto;
  margin-right: auto;
}

.cta p {
  max-width: 680px;
  margin-left: auto;
  margin-right: auto;
}

.cta .primary-btn {
  margin-top: 28px;
}

.cta-meta {
  margin: 14px 0 0;
  color: #8b7c69;
  font-size: 14px;
}

.footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 0 0 36px;
}

.footer strong {
  font-size: 18px;
  letter-spacing: -0.02em;
}

.footer p {
  margin: 8px 0 0;
  color: var(--muted);
}

.toast {
  position: fixed;
  left: 50%;
  bottom: 26px;
  z-index: 40;
  padding: 12px 18px;
  border-radius: 999px;
  background: rgba(36, 31, 23, 0.92);
  color: #fff;
  box-shadow: 0 18px 40px rgba(64, 47, 25, 0.16);
  opacity: 0;
  transform: translate(-50%, 18px);
  pointer-events: none;
  transition: opacity 180ms ease, transform 180ms ease;
}

.toast.show {
  opacity: 1;
  transform: translate(-50%, 0);
}

.reveal {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 500ms ease, transform 500ms ease;
}

.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

@media (max-width: 1080px) {
  .hero,
  .feature-layout,
  .scene-shell {
    grid-template-columns: 1fr;
  }

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

@media (max-width: 760px) {
  .section {
    width: min(100% - 24px, 1180px);
  }

  .topbar-shell {
    flex-wrap: wrap;
    justify-content: center;
    text-align: center;
  }

  .nav {
    width: 100%;
    justify-content: space-between;
    gap: 14px;
    font-size: 14px;
  }

  .hero {
    padding-top: 34px;
  }

  .hero-desc,
  .formats-copy p:last-child,
  .scene-copy p,
  .cta p {
    font-size: 17px;
  }

  .hero-stage,
  .summary-shell,
  .scene-rail article {
    border-radius: 24px;
  }

  .hero-stage,
  .summary-shell,
  .feature-band,
  .scene-band,
  .formats,
  .cta {
    padding-top: 24px;
  }

  .feature-band,
  .scene-band,
  .formats,
  .cta {
    padding-bottom: 64px;
  }

  .feature-row-head,
  .format-row {
    grid-template-columns: 1fr;
    gap: 10px;
  }

  .feature-row p {
    margin-left: 0;
  }

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