:root {
  --bg: #f4efe7;
  --surface: rgba(255, 255, 255, 0.66);
  --line: rgba(21, 24, 28, 0.12);
  --ink: #111417;
  --muted: #625c53;
  --accent: #0d6a54;
  --accent-soft: rgba(13, 106, 84, 0.12);
  --accent-strong: #083f33;
  --hero-gradient: radial-gradient(circle at 20% 20%, rgba(180, 130, 62, 0.18), transparent 44%),
    radial-gradient(circle at 84% 12%, rgba(13, 106, 84, 0.18), transparent 34%),
    linear-gradient(140deg, rgba(255, 255, 255, 0.88), rgba(245, 238, 228, 0.72));
  --shadow-large: 0 36px 80px rgba(16, 21, 28, 0.08);
  --shadow-medium: 0 18px 44px rgba(16, 21, 28, 0.08);
  --content-width: min(1200px, calc(100vw - 48px));
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-width: 320px;
  color: var(--ink);
  background:
    radial-gradient(circle at top, rgba(255, 255, 255, 0.72), transparent 36%),
    linear-gradient(180deg, #f7f3eb 0%, #f4efe7 46%, #f0ebdf 100%);
  font-family: "Source Han Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(17, 20, 23, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(17, 20, 23, 0.03) 1px, transparent 1px);
  background-size: 56px 56px;
  mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.58), transparent 92%);
}

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 40;
  transition: background 0.25s ease, box-shadow 0.25s ease, border-color 0.25s ease;
}

.site-header.is-scrolled {
  background: rgba(244, 239, 231, 0.84);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid rgba(17, 20, 23, 0.08);
  box-shadow: 0 12px 32px rgba(19, 22, 27, 0.05);
}

.nav-shell,
.footer-shell,
.hero-shell,
.section-shell,
.page-shell {
  width: var(--content-width);
  margin: 0 auto;
}

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

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

.brand-mark,
.footer-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 42px;
  height: 42px;
  border-radius: 14px;
  background: linear-gradient(145deg, #111417, #2a332d);
  color: #f6f0e7;
  font-weight: 700;
  letter-spacing: 0.12em;
}

.brand-text {
  display: flex;
  flex-direction: column;
  gap: 3px;
}

.brand-text strong {
  font-size: 1rem;
  font-weight: 700;
}

.brand-text span,
.hero-copy,
.page-copy,
.section-copy,
.signal-card p,
.feature-card p,
.support-card p,
.architecture-band p,
.release-description,
.notice-card p,
.footer-brand span {
  color: var(--muted);
  line-height: 1.75;
}

.nav-links {
  display: inline-flex;
  align-items: center;
  gap: 10px;
}

.nav-links a {
  padding: 10px 14px;
  border-radius: 999px;
  color: var(--muted);
}

.nav-links a:hover,
.nav-links a.is-active {
  color: var(--ink);
  background: rgba(17, 20, 23, 0.06);
}

.menu-toggle {
  display: none;
}

.main-shell {
  padding: 28px 0 80px;
}

.hero-frame,
.page-frame {
  position: relative;
  overflow: hidden;
  border: 1px solid rgba(17, 20, 23, 0.08);
  border-radius: 36px;
  background: var(--hero-gradient);
  box-shadow: var(--shadow-large);
}

.hero-frame::before,
.page-frame::before {
  content: "";
  position: absolute;
  inset: 18px;
  border-radius: 28px;
  border: 1px solid rgba(17, 20, 23, 0.06);
  pointer-events: none;
}

.hero-shell {
  display: grid;
  grid-template-columns: minmax(0, 1.3fr) minmax(320px, 0.9fr);
  gap: 32px;
  padding: 72px 0;
}

.page-shell {
  padding: 56px 0;
}

.eyebrow,
.section-kicker,
.page-kicker,
.notice-category,
.release-channel,
.pill {
  display: inline-flex;
  align-items: center;
  width: fit-content;
  padding: 8px 12px;
  border-radius: 999px;
  background: rgba(17, 20, 23, 0.06);
  color: var(--muted);
  letter-spacing: 0.08em;
  font-size: 0.75rem;
  text-transform: uppercase;
}

.hero-title,
.page-title,
.section-title {
  margin: 18px 0 0;
  font-family: "Source Han Serif SC", "Songti SC", "STSong", serif;
  font-weight: 700;
  line-height: 1.05;
  letter-spacing: -0.02em;
}

.hero-title {
  font-size: clamp(3.2rem, 7vw, 6.4rem);
}

.page-title {
  font-size: clamp(2.6rem, 5vw, 4.8rem);
}

.section-title {
  font-size: clamp(2rem, 4vw, 3rem);
}

.hero-copy {
  max-width: 42rem;
  margin: 24px 0 0;
  font-size: 1.08rem;
}

.page-copy {
  max-width: 46rem;
  margin-top: 18px;
  font-size: 1rem;
}

.hero-actions,
.page-actions,
.release-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 30px;
}

.primary-button,
.secondary-button,
.ghost-button,
.button-disabled {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 22px;
  border-radius: 999px;
  transition: transform 0.22s ease, box-shadow 0.22s ease;
}

.primary-button {
  background: linear-gradient(145deg, #111417, #1f2924);
  color: #f8f4ed;
  box-shadow: 0 16px 34px rgba(17, 20, 23, 0.16);
}

.primary-button:hover,
.secondary-button:hover,
.ghost-button:hover {
  transform: translateY(-2px);
}

.secondary-button {
  background: rgba(255, 255, 255, 0.62);
  border: 1px solid rgba(17, 20, 23, 0.1);
  color: var(--ink);
}

.ghost-button {
  background: transparent;
  border: 1px solid rgba(17, 20, 23, 0.12);
}

.button-disabled,
.secondary-button.is-disabled {
  background: rgba(17, 20, 23, 0.06);
  color: rgba(17, 20, 23, 0.36);
  pointer-events: none;
}

.hero-grid,
.hero-metrics,
.feature-grid,
.support-grid,
.page-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}

.hero-grid {
  margin-top: 40px;
}

.hero-side {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.hero-panel,
.signal-card,
.feature-card,
.support-card,
.architecture-band,
.release-card,
.notice-card,
.page-panel,
.metric-card {
  position: relative;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 22px;
  background: var(--surface);
  backdrop-filter: blur(16px);
  box-shadow: var(--shadow-medium);
}

.hero-panel,
.signal-card,
.feature-card,
.support-card,
.release-card,
.notice-card,
.page-panel,
.metric-card {
  padding: 24px;
}

.hero-panel h2,
.page-panel h3,
.signal-card strong,
.feature-card h3,
.support-card h3,
.release-card h3,
.notice-card h3,
.architecture-band strong {
  margin: 0;
}

.hero-metrics .metric-card strong {
  display: block;
  margin-top: 10px;
  font-size: clamp(2.1rem, 4vw, 3rem);
}

.hero-metrics .metric-card span {
  color: var(--muted);
  font-size: 0.84rem;
}

.section {
  padding: 24px 0 32px;
}

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

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

.feature-card::after,
.signal-card::after,
.support-card::after,
.release-card::after,
.notice-card::after,
.architecture-band::after {
  content: "";
  position: absolute;
  inset: auto -20px -32px auto;
  width: 140px;
  height: 140px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(13, 106, 84, 0.14), transparent 68%);
}

.card-index {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: rgba(17, 20, 23, 0.06);
  color: var(--accent-strong);
  font-size: 0.76rem;
  font-weight: 700;
}

.feature-card h3,
.support-card h3 {
  margin: 14px 0 10px;
}

.architecture-stack {
  display: grid;
  gap: 18px;
}

.architecture-band {
  display: grid;
  grid-template-columns: 220px minmax(0, 1fr) auto;
  align-items: center;
  gap: 24px;
  padding: 26px 28px;
}

.architecture-band .pill {
  background: var(--accent-soft);
  color: var(--accent-strong);
}

.architecture-meta,
.release-detail-label {
  color: var(--muted);
  font-size: 0.84rem;
}

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

.release-head,
.notice-head {
  display: flex;
  align-items: start;
  justify-content: space-between;
  gap: 20px;
}

.release-card h3 {
  font-size: 1.9rem;
  letter-spacing: -0.04em;
}

.release-details {
  display: grid;
  gap: 18px;
  margin-top: 26px;
}

.release-detail-label {
  display: block;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.release-detail-text,
.detail-link {
  display: inline-block;
  margin-top: 8px;
  word-break: break-all;
}

.release-detail-list {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 10px;
}

.detail-link {
  padding: 8px 12px;
  border-radius: 999px;
  background: rgba(17, 20, 23, 0.06);
}

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

.notice-priority {
  display: inline-flex;
  align-items: center;
  padding: 7px 11px;
  border-radius: 999px;
  background: rgba(180, 130, 62, 0.14);
  color: #845b25;
  font-size: 0.78rem;
}

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

.notice-tags span {
  padding: 7px 10px;
  border-radius: 999px;
  background: rgba(17, 20, 23, 0.06);
  color: var(--muted);
  font-size: 0.78rem;
}

.share-panel {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(280px, 0.85fr);
  gap: 22px;
}

.share-status {
  margin-top: 22px;
  padding: 18px 20px;
  border-radius: 18px;
  background: rgba(17, 20, 23, 0.05);
  color: var(--muted);
}

.share-keyfacts {
  display: grid;
  gap: 14px;
}

.share-keyfacts div {
  padding: 18px 20px;
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.76);
  border: 1px solid rgba(17, 20, 23, 0.08);
}

.share-keyfacts span {
  display: block;
  color: var(--muted);
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.share-keyfacts strong {
  display: block;
  margin-top: 8px;
  font-size: 1.14rem;
}

.footer {
  padding: 26px 0 52px;
}

.footer-shell {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 28px 0 0;
  border-top: 1px solid rgba(17, 20, 23, 0.08);
}

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

.footer-brand p {
  margin: 0;
  font-weight: 700;
}

.footer-meta {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 10px;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 12px;
}

.footer-copy {
  color: var(--muted);
  font-size: 0.86rem;
}

[data-reveal] {
  opacity: 0;
  transform: translateY(26px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

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

@media (max-width: 1080px) {
  .hero-shell,
  .share-panel,
  .architecture-band,
  .release-grid,
  .notice-grid {
    grid-template-columns: 1fr;
  }

  .feature-grid,
  .support-grid,
  .page-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 820px) {
  .nav-links {
    position: absolute;
    top: calc(100% + 10px);
    right: 24px;
    display: none;
    flex-direction: column;
    align-items: stretch;
    min-width: 220px;
    padding: 14px;
    border-radius: 20px;
    border: 1px solid rgba(17, 20, 23, 0.08);
    background: rgba(255, 255, 255, 0.92);
    box-shadow: 0 18px 40px rgba(17, 20, 23, 0.08);
  }

  .nav-links.is-open {
    display: flex;
  }

  .menu-toggle {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 46px;
    height: 46px;
    border: 1px solid rgba(17, 20, 23, 0.12);
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.72);
  }

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

@media (max-width: 700px) {
  :root {
    --content-width: min(100vw - 32px, 1200px);
  }

  .hero-shell,
  .page-shell {
    padding-top: 44px;
    padding-bottom: 44px;
  }

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

  .footer-meta {
    align-items: flex-start;
  }
}