:root {
  color-scheme: light;
  --ink: #201d1c;
  --muted: #6d6662;
  --line: #eadfd9;
  --paper: #fffdfb;
  --warm: #fff4ed;
  --brand: #b93424;
  --brand-dark: #842115;
  --warning: #7a3e05;
  --warning-bg: #fff3d9;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  background: #f7f3f0;
}

body {
  margin: 0;
  color: var(--ink);
  background:
    radial-gradient(circle at 88% 4%, rgba(232, 128, 91, 0.18), transparent 30rem),
    linear-gradient(180deg, var(--paper), #f7f3f0 75%);
  line-height: 1.7;
}

a {
  color: var(--brand-dark);
  text-decoration-thickness: 1px;
  text-underline-offset: 0.18em;
}

a:focus-visible,
.button:focus-visible {
  outline: 3px solid rgba(185, 52, 36, 0.28);
  outline-offset: 3px;
}

.shell {
  width: min(1080px, calc(100% - 32px));
  margin: 0 auto;
}

.site-header {
  border-bottom: 1px solid rgba(234, 223, 217, 0.9);
  background: rgba(255, 253, 251, 0.9);
}

.header-inner {
  display: flex;
  min-height: 72px;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  color: var(--ink);
  font-weight: 760;
  text-decoration: none;
}

.brand-mark {
  display: block;
  width: 42px;
  height: 42px;
  border-radius: 13px;
  object-fit: cover;
  box-shadow: 0 8px 24px rgba(132, 33, 21, 0.22);
}

.brand small {
  display: block;
  color: var(--muted);
  font-size: 12px;
  font-weight: 560;
  letter-spacing: 0.04em;
}

.top-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 18px;
  font-size: 14px;
}

.top-nav a {
  color: var(--muted);
  text-decoration: none;
}

.top-nav a:hover {
  color: var(--brand-dark);
}

.release-status {
  margin: 28px 0 0;
  padding: 14px 16px;
  border: 1px solid #efd09e;
  border-radius: 14px;
  color: var(--warning);
  background: var(--warning-bg);
  font-size: 14px;
}

.release-status strong {
  display: inline-block;
  margin-right: 8px;
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.45fr) minmax(280px, 0.75fr);
  gap: 48px;
  align-items: center;
  padding: 76px 0 68px;
}

.eyebrow {
  margin: 0 0 12px;
  color: var(--brand);
  font-size: 13px;
  font-weight: 760;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

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

h1 {
  max-width: 760px;
  margin-bottom: 22px;
  font-size: clamp(38px, 7vw, 68px);
  line-height: 1.08;
  letter-spacing: -0.04em;
}

.lede {
  max-width: 660px;
  margin-bottom: 30px;
  color: var(--muted);
  font-size: clamp(17px, 2.4vw, 21px);
}

.button-row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.button {
  display: inline-flex;
  min-height: 46px;
  align-items: center;
  justify-content: center;
  padding: 0 18px;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--ink);
  background: #fff;
  font-weight: 700;
  text-decoration: none;
}

.button.primary {
  border-color: var(--brand-dark);
  color: #fff;
  background: var(--brand-dark);
}

.offer-card {
  padding: 26px;
  border: 1px solid rgba(255, 255, 255, 0.65);
  border-radius: 26px;
  color: #fff;
  background: linear-gradient(145deg, #d05a43 0%, #9f2d1d 58%, #6d1c14 100%);
  box-shadow: 0 26px 70px rgba(97, 30, 19, 0.24);
  transform: rotate(2deg);
}

.offer-card .chip {
  width: 44px;
  height: 32px;
  margin-bottom: 44px;
  border-radius: 8px;
  background: linear-gradient(135deg, #f6df9a, #c6a551);
}

.offer-card strong {
  display: block;
  margin-bottom: 8px;
  font-size: 27px;
}

.offer-card p {
  margin-bottom: 0;
  color: rgba(255, 255, 255, 0.78);
}

.section {
  padding: 58px 0;
  border-top: 1px solid var(--line);
}

.section h2 {
  margin-bottom: 10px;
  font-size: clamp(28px, 4vw, 42px);
  line-height: 1.2;
}

.section-intro {
  max-width: 720px;
  margin-bottom: 32px;
  color: var(--muted);
}

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

.feature,
.link-card,
.document-card {
  border: 1px solid var(--line);
  border-radius: 20px;
  background: rgba(255, 255, 255, 0.82);
}

.feature,
.link-card {
  padding: 24px;
}

.feature h3,
.link-card h3 {
  margin-bottom: 8px;
  font-size: 18px;
}

.feature p,
.link-card p {
  margin-bottom: 0;
  color: var(--muted);
}

.link-card {
  color: inherit;
  text-decoration: none;
  transition: border-color 160ms ease, transform 160ms ease;
}

.link-card:hover {
  border-color: #d7aaa0;
  transform: translateY(-2px);
}

.document-main {
  max-width: 820px;
  padding: 52px 0 76px;
}

.document-main h1 {
  margin-bottom: 12px;
  font-size: clamp(34px, 6vw, 54px);
}

.document-card {
  margin-top: 30px;
  padding: clamp(22px, 4vw, 38px);
}

.document-card h2 {
  margin-top: 30px;
  margin-bottom: 8px;
  font-size: 21px;
}

.document-card h2:first-child {
  margin-top: 0;
}

.document-card p,
.document-card li {
  color: var(--muted);
}

.document-card ul {
  padding-left: 22px;
}

.site-footer {
  padding: 30px 0 44px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 13px;
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  gap: 18px;
}

@media (max-width: 760px) {
  .header-inner,
  .footer-inner {
    align-items: flex-start;
    flex-direction: column;
    padding: 14px 0;
  }

  .top-nav {
    gap: 14px;
  }

  .hero {
    grid-template-columns: 1fr;
    gap: 42px;
    padding: 54px 0;
  }

  .offer-card {
    max-width: 420px;
    transform: none;
  }

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

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