:root {
  --paper: #f2eee5;
  --paper-deep: #e8e1d4;
  --ink: #252a28;
  --ink-soft: #626861;
  --line: rgba(37, 42, 40, 0.16);
  --cinnabar: #a94a3a;
  --cinnabar-dark: #87392e;
  --shadow: 0 28px 70px rgba(41, 36, 30, 0.13);
}

* {
  box-sizing: border-box;
}

html {
  overflow-x: hidden;
  background: var(--paper);
  color: var(--ink);
  font-family: "Noto Serif SC", "Source Han Serif SC", "Songti SC", SimSun, serif;
  text-rendering: optimizeLegibility;
}

body {
  min-height: 100vh;
  margin: 0;
  overflow-x: hidden;
  background:
    radial-gradient(circle at 82% 6%, rgba(169, 74, 58, 0.09), transparent 28rem),
    linear-gradient(118deg, rgba(255, 255, 255, 0.44), transparent 38%);
}

.paper-noise {
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  opacity: 0.36;
  background-image:
    repeating-linear-gradient(0deg, transparent 0 3px, rgba(37, 42, 40, 0.018) 3px 4px),
    repeating-linear-gradient(93deg, transparent 0 11px, rgba(255, 255, 255, 0.22) 11px 12px);
}

a {
  color: inherit;
}

main,
footer {
  width: min(1180px, calc(100% - 48px));
  margin-inline: auto;
}

.release-hero {
  display: grid;
  min-height: 610px;
  grid-template-columns: minmax(0, 1.12fr) minmax(360px, 0.78fr);
  align-items: center;
  gap: clamp(52px, 8vw, 112px);
  padding: 76px 0 88px;
}

.release-hero .hero-copy {
  grid-row: auto;
  text-align: left;
}

.eyebrow,
.file-meta,
.card-topline,
.download-button,
.purchase-link,
.sample-kicker,
.sample-file-meta,
.sample-download-button,
.sample-open-tip,
.sample-hash {
  font-family: "Microsoft YaHei UI", "PingFang SC", sans-serif;
}

.eyebrow {
  margin: 0 0 23px;
  color: var(--cinnabar);
  font-size: 0.76rem;
  font-weight: 700;
  letter-spacing: 0.13em;
}

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

h1 {
  margin-bottom: 30px;
  font-family: "STKaiti", "KaiTi", serif;
  font-size: clamp(3.25rem, 6vw, 6.35rem);
  font-weight: 600;
  line-height: 1.03;
  letter-spacing: -0.055em;
}

h1 em {
  color: var(--cinnabar);
  font-style: normal;
  white-space: nowrap;
}

.intro {
  max-width: 620px;
  margin-bottom: 0;
  color: var(--ink-soft);
  font-size: 1.06rem;
  line-height: 1.95;
}

.download-card {
  position: relative;
  overflow: hidden;
  padding: 34px;
  border: 1px solid rgba(37, 42, 40, 0.2);
  border-radius: 3px 38px 3px 3px;
  background: rgba(250, 247, 240, 0.9);
  box-shadow: var(--shadow);
}

.download-card::after {
  position: absolute;
  right: -25px;
  bottom: -70px;
  pointer-events: none;
  content: "墨";
  color: rgba(37, 42, 40, 0.035);
  font-family: "STKaiti", "KaiTi", serif;
  font-size: 14rem;
  line-height: 1;
}

.card-topline {
  position: relative;
  z-index: 1;
  display: flex;
  align-items: center;
  gap: 9px;
  color: var(--ink-soft);
  font-size: 0.8rem;
}

.status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--cinnabar);
  box-shadow: 0 0 0 5px rgba(169, 74, 58, 0.11);
}

.download-card h2 {
  position: relative;
  z-index: 1;
  margin: 42px 0 9px;
  font-family: "STKaiti", "KaiTi", serif;
  font-size: 2.25rem;
}

.file-meta {
  position: relative;
  z-index: 1;
  margin-bottom: 30px;
  color: var(--ink-soft);
  font-size: 0.82rem;
}

.download-button,
.purchase-link {
  position: relative;
  z-index: 1;
  display: flex;
  align-items: center;
  justify-content: space-between;
  text-decoration: none;
}

.download-button {
  min-height: 58px;
  padding: 0 22px;
  border: 1px solid var(--cinnabar);
  color: #fffaf2;
  background: var(--cinnabar);
  font-weight: 700;
  transition: transform 160ms ease, background 160ms ease, box-shadow 160ms ease;
}

.download-button:hover,
.download-button:focus-visible {
  transform: translateY(-2px);
  background: var(--cinnabar-dark);
  box-shadow: 0 12px 24px rgba(135, 57, 46, 0.22);
}

.mobile-handoff {
  position: relative;
  z-index: 1;
  display: none;
  margin: 12px 0 0;
  padding: 13px 15px;
  border: 1px solid rgba(169, 74, 58, 0.24);
  color: var(--ink-soft);
  background: rgba(169, 74, 58, 0.045);
  font-family: "Microsoft YaHei UI", "PingFang SC", sans-serif;
  font-size: 0.82rem;
  line-height: 1.7;
}

.mobile-handoff strong {
  margin-right: 0.35em;
  color: var(--ink);
}

.purchase-link {
  display: flex;
  width: 100%;
  align-items: center;
  justify-content: space-between;
  margin: 12px 0 30px;
  padding: 16px 18px;
  border: 1px solid rgba(169, 74, 58, 0.55);
  color: var(--cinnabar-dark);
  background: rgba(169, 74, 58, 0.045);
  font-size: 1rem;
  font-weight: 700;
  text-decoration: none;
  transition: color 160ms ease, border-color 160ms ease, background 160ms ease;
}

.purchase-link:hover,
.purchase-link:focus-visible {
  border-color: var(--cinnabar);
  color: var(--cinnabar-dark);
  background: rgba(169, 74, 58, 0.1);
}

.install-tip {
  position: relative;
  z-index: 1;
  padding: 18px 18px 16px;
  border-left: 3px solid var(--cinnabar);
  background: rgba(169, 74, 58, 0.065);
}

.install-tip strong {
  font-size: 0.88rem;
}

.install-tip p {
  margin: 8px 0 0;
  color: var(--ink-soft);
  font-size: 0.78rem;
  line-height: 1.75;
}

.sample-project {
  display: grid;
  grid-template-columns: minmax(0, 1.08fr) minmax(360px, 0.92fr);
  align-items: center;
  gap: clamp(52px, 7vw, 96px);
  padding: 84px 0;
  border-top: 1px solid var(--line);
}

.sample-kicker {
  margin: 0 0 20px;
  color: var(--cinnabar);
  font-size: 0.76rem;
  font-weight: 700;
  letter-spacing: 0.13em;
}

.sample-project-copy h2 {
  margin-bottom: 24px;
  font-family: "STKaiti", "KaiTi", serif;
  font-size: clamp(2.35rem, 4.3vw, 4.4rem);
  font-weight: 600;
  line-height: 1.14;
  letter-spacing: -0.045em;
}

.sample-project-copy h2 em {
  color: var(--cinnabar);
  font-style: normal;
}

.sample-project-copy > p:last-of-type {
  max-width: 650px;
  margin-bottom: 0;
  color: var(--ink-soft);
  font-size: 1rem;
  line-height: 1.9;
}

.sample-stats {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1px;
  margin: 34px 0 0;
  padding: 0;
  background: var(--line);
  list-style: none;
}

.sample-stats li {
  min-width: 0;
  padding: 17px 14px 15px;
  background: var(--paper);
}

.sample-stats strong,
.sample-stats span {
  display: block;
}

.sample-stats strong {
  margin-bottom: 7px;
  color: var(--cinnabar-dark);
  font-family: "STKaiti", "KaiTi", serif;
  font-size: 1.72rem;
  line-height: 1;
}

.sample-stats span {
  color: var(--ink-soft);
  font-size: 0.76rem;
  line-height: 1.45;
}

.sample-download-panel {
  position: relative;
  padding: 30px;
  border: 1px solid rgba(37, 42, 40, 0.2);
  background:
    linear-gradient(145deg, rgba(255, 255, 255, 0.62), transparent 62%),
    rgba(232, 225, 212, 0.74);
  box-shadow: 0 22px 52px rgba(41, 36, 30, 0.1);
}

.sample-file-meta {
  display: grid;
  gap: 8px;
  margin-bottom: 24px;
}

.sample-file-meta strong {
  font-family: "STKaiti", "KaiTi", serif;
  font-size: 1.34rem;
}

.sample-file-meta span {
  color: var(--ink-soft);
  font-size: 0.76rem;
  line-height: 1.6;
}

.sample-download-button {
  display: flex;
  min-height: 58px;
  align-items: center;
  justify-content: space-between;
  padding: 0 22px;
  border: 1px solid var(--ink);
  color: var(--paper);
  background: var(--ink);
  font-weight: 700;
  text-decoration: none;
  transition: transform 160ms ease, border-color 160ms ease, background 160ms ease, box-shadow 160ms ease;
}

.sample-download-button:hover,
.sample-download-button:focus-visible {
  transform: translateY(-2px);
  border-color: var(--cinnabar-dark);
  background: var(--cinnabar-dark);
  box-shadow: 0 12px 24px rgba(135, 57, 46, 0.19);
}

.sample-open-tip {
  margin: 20px 0 0;
  color: var(--ink-soft);
  font-size: 0.8rem;
  line-height: 1.75;
}

.sample-open-tip strong {
  margin-right: 0.5em;
  color: var(--ink);
}

.sample-hash {
  margin: 15px 0 0;
  padding-top: 15px;
  border-top: 1px solid var(--line);
  color: var(--ink-soft);
  font-size: 0.68rem;
  line-height: 1.65;
}

.sample-hash code {
  margin-left: 0.45em;
  color: var(--ink);
  overflow-wrap: anywhere;
}

.quick-start {
  padding: 76px 0 88px;
  border-top: 1px solid var(--line);
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.start-steps {
  display: grid;
  width: 100%;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1px;
  margin: 0;
  padding: 0;
  background: var(--line);
  list-style: none;
}

.start-steps li {
  min-height: 210px;
  padding: 27px 25px;
  background: var(--paper);
}

.start-steps li > span {
  display: block;
  margin-bottom: 36px;
  color: var(--cinnabar);
  font-family: "Microsoft YaHei UI", "PingFang SC", sans-serif;
  font-size: 0.86rem;
  font-weight: 700;
}

.start-steps h3 {
  margin-bottom: 15px;
  font-size: 1.28rem;
}

.start-steps p {
  margin: 0;
  color: var(--ink-soft);
  font-size: 1rem;
  line-height: 1.75;
}

footer {
  display: flex;
  justify-content: space-between;
  gap: 24px;
  padding: 30px 0 42px;
  border-top: 1px solid var(--line);
  color: var(--ink-soft);
  font-size: 0.76rem;
}

footer nav {
  display: flex;
  flex-wrap: wrap;
  gap: 20px;
}

footer a {
  color: var(--cinnabar-dark);
  text-underline-offset: 4px;
}

@media (max-width: 850px) {
  main,
  footer {
    width: min(100% - 32px, 680px);
  }

  .release-hero {
    grid-template-columns: 1fr;
    gap: 48px;
    padding: 58px 0 72px;
  }

  .download-card {
    max-width: 560px;
  }

  .sample-project {
    grid-template-columns: 1fr;
    gap: 42px;
    padding: 70px 0;
  }

  .sample-download-panel {
    max-width: 620px;
  }

  .mobile-handoff {
    display: block;
  }

}

@media (max-width: 520px) {
  h1 {
    font-size: clamp(2.75rem, 14vw, 4rem);
  }

  h1 em {
    white-space: normal;
  }

  .download-card {
    padding: 26px 22px;
    border-radius: 3px 28px 3px 3px;
  }

  .sample-project-copy h2 {
    font-size: clamp(2.2rem, 11vw, 3.15rem);
  }

  .sample-stats {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .sample-download-panel {
    padding: 24px 22px;
  }

  .start-steps {
    grid-template-columns: 1fr;
  }

  .start-steps li {
    min-height: 0;
  }

  footer {
    flex-direction: column;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition: none !important;
  }
}