:root {
  --bg: #f6f3ec;
  --surface: rgba(255, 255, 255, 0.82);
  --surface-strong: #ffffff;
  --text: #181512;
  --muted: #6c6761;
  --line: rgba(24, 21, 18, 0.1);
  --shadow: 0 18px 50px rgba(34, 28, 22, 0.08);
  --shadow-soft: 0 10px 28px rgba(34, 28, 22, 0.06);
  --accent: #2f7d4d;
  --accent-soft: #e7f0e8;
  --warm: #f0b14a;
}

* {
  box-sizing: border-box;
}

html {
  min-height: 100%;
  background: var(--bg);
}

body {
  margin: 0;
  min-height: 100vh;
  color: var(--text);
  font-family: ui-sans-serif, -apple-system, BlinkMacSystemFont, "SF Pro Text", "PingFang SC",
    "Microsoft YaHei", sans-serif;
  background:
    radial-gradient(circle at top left, rgba(240, 177, 74, 0.12), transparent 30rem),
    radial-gradient(circle at top right, rgba(47, 125, 77, 0.08), transparent 28rem),
    linear-gradient(180deg, #faf7f1 0%, var(--bg) 100%);
}

a {
  color: inherit;
}

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

.page-shell {
  width: min(1180px, calc(100% - 40px));
  margin: 0 auto;
  padding: 24px 0 72px;
}

.hero,
.intro-band,
.showcase,
.download-guide,
.search-copy,
.release-layout {
  position: relative;
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(360px, 0.95fr);
  gap: 48px;
  align-items: center;
  padding: 40px 0 52px;
}

.brand-lockup {
  display: flex;
  gap: 16px;
  align-items: center;
  margin-bottom: 26px;
}

.brand-lockup__icon {
  width: 56px;
  height: 56px;
  border-radius: 16px;
  box-shadow: var(--shadow-soft);
}

.eyebrow {
  margin: 0 0 6px;
  color: var(--accent);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.brand-lockup__hint {
  margin: 0;
  color: var(--muted);
  font-size: 0.92rem;
}

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

h1,
h2 {
  font-family: ui-serif, "Iowan Old Style", "Songti SC", "Noto Serif CJK SC", Georgia, serif;
  letter-spacing: 0;
}

h1 {
  max-width: 12ch;
  margin-bottom: 18px;
  font-size: clamp(3rem, 6vw, 5.1rem);
  line-height: 0.98;
}

.hero__lead {
  max-width: 620px;
  margin-bottom: 22px;
  color: var(--muted);
  font-size: 1.08rem;
  line-height: 1.85;
}

.hero-points {
  display: grid;
  gap: 10px;
  padding: 0;
  margin: 0 0 30px;
  list-style: none;
}

.hero-points li {
  position: relative;
  padding-left: 18px;
  color: var(--text);
  font-size: 0.98rem;
}

.hero-points li::before {
  position: absolute;
  left: 0;
  top: 0.55em;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--accent);
  content: "";
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 28px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 52px;
  padding: 0 22px;
  border: 1px solid var(--line);
  border-radius: 8px;
  font-size: 0.98rem;
  font-weight: 700;
  text-decoration: none;
  transition:
    transform 160ms ease,
    box-shadow 160ms ease,
    border-color 160ms ease,
    background 160ms ease;
}

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

.button--primary {
  border-color: rgba(47, 125, 77, 0.25);
  background: var(--text);
  color: #ffffff;
  box-shadow: var(--shadow-soft);
}

.button--primary[aria-disabled="true"] {
  pointer-events: none;
  opacity: 0.6;
}

.button--ghost {
  background: rgba(255, 255, 255, 0.72);
}

.button--ghost:hover {
  border-color: rgba(24, 21, 18, 0.18);
  background: #ffffff;
}

.release-card {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
  backdrop-filter: blur(16px);
  box-shadow: var(--shadow-soft);
}

.release-card > div {
  padding: 18px 20px;
}

.release-card > div + div {
  border-left: 1px solid var(--line);
}

.release-card__label {
  display: block;
  margin-bottom: 6px;
  color: var(--muted);
  font-size: 0.84rem;
}

.release-card strong {
  font-size: 1.02rem;
}

.hero-visual {
  position: relative;
  min-height: 660px;
  padding: 30px 0;
}

.hero-visual__badge {
  position: absolute;
  top: 14px;
  left: 18px;
  z-index: 2;
  padding: 9px 14px;
  border: 1px solid rgba(47, 125, 77, 0.18);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.9);
  color: var(--accent);
  font-size: 0.84rem;
  font-weight: 700;
  box-shadow: var(--shadow-soft);
}

.hero-visual__phone {
  position: absolute;
  top: 56px;
  right: 54px;
  width: min(320px, 72%);
  border: 10px solid #16120f;
  border-radius: 40px;
  overflow: hidden;
  background: #ffffff;
  box-shadow: 0 30px 70px rgba(28, 24, 19, 0.18);
}

.hero-visual__phone img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.hero-visual__panel {
  position: absolute;
  width: min(250px, 54%);
  padding: 18px 18px 20px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.84);
  backdrop-filter: blur(16px);
  box-shadow: var(--shadow-soft);
}

.hero-visual__panel p,
.hero-visual__panel span {
  margin: 0;
}

.hero-visual__panel p {
  color: var(--accent);
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.hero-visual__panel strong {
  display: block;
  margin: 10px 0 8px;
  font-size: 1.16rem;
  line-height: 1.35;
}

.hero-visual__panel span {
  color: var(--muted);
  font-size: 0.93rem;
  line-height: 1.7;
}

.hero-visual__panel--top {
  top: 160px;
  left: 0;
}

.hero-visual__panel--bottom {
  right: 0;
  bottom: 52px;
}

.intro-band {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(280px, 0.85fr);
  gap: 28px;
  align-items: end;
  margin: 8px 0 28px;
  padding: 28px 30px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.68);
  backdrop-filter: blur(14px);
}

.intro-band h2,
.section-heading h2 {
  margin: 0;
  font-size: clamp(2rem, 4vw, 3.2rem);
  line-height: 1.08;
}

.intro-band p:last-child {
  margin: 0;
  color: var(--muted);
  line-height: 1.85;
}

.showcase,
.download-guide,
.search-copy,
.release-layout {
  margin-top: 28px;
  padding: 34px 30px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.72);
  backdrop-filter: blur(14px);
}

.section-heading {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 16px;
  align-items: end;
  margin-bottom: 24px;
}

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

.feature-card,
.download-guide__card,
.changelog {
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface-strong);
  box-shadow: var(--shadow-soft);
}

.feature-card img {
  width: 100%;
  aspect-ratio: 4 / 4.9;
  object-fit: cover;
  object-position: top;
}

.feature-card__body,
.download-guide__card {
  padding: 20px;
}

.feature-card__body span,
.download-guide__card span {
  color: var(--accent);
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.feature-card__body h3,
.download-guide__card h3,
.changelog__version {
  margin: 10px 0 10px;
  font-size: 1.32rem;
  line-height: 1.4;
}

.feature-card__body p,
.download-guide__card p,
.search-copy__grid p,
.changelog,
.release-status {
  color: var(--muted);
  line-height: 1.8;
}

.download-guide__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.1fr);
  gap: 18px;
}

.download-guide__card .button {
  margin-top: 10px;
}

.download-guide__qr {
  width: min(100%, 340px);
  margin-top: 14px;
  border-radius: 8px;
}

.download-guide__group {
  margin: 14px 0 0;
  color: var(--text);
  font-weight: 700;
}

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

.search-copy__grid p {
  margin: 0;
  padding: 18px 20px;
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.72);
}

.changelog-list {
  display: grid;
  gap: 16px;
}

.changelog {
  padding: 22px;
}

.changelog__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: baseline;
  margin-bottom: 14px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--line);
}

.changelog__version {
  margin: 0;
  color: var(--text);
}

.changelog__date {
  color: var(--muted);
  font-size: 0.9rem;
  font-weight: 700;
}

.changelog__body {
  color: var(--muted);
  line-height: 1.8;
}

.changelog__body h1,
.changelog__body h2,
.changelog__body h3 {
  margin: 0.8em 0 0.35em;
  color: var(--text);
  font-size: 1.06rem;
}

.changelog__body p {
  margin-bottom: 0.8em;
}

.changelog__body ul {
  margin-top: 0.4em;
  padding-left: 1.2em;
}

.load-more-button {
  display: inline-flex;
  gap: 10px;
  align-items: center;
  margin-top: 18px;
  padding: 14px 18px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface-strong);
  color: var(--text);
  font-size: 0.95rem;
  font-weight: 700;
  cursor: pointer;
}

.release-status {
  margin: 16px 0 0;
  font-size: 0.92rem;
}

@media (max-width: 1024px) {
  .hero {
    grid-template-columns: 1fr;
  }

  .hero-visual {
    min-height: 600px;
  }

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

@media (max-width: 860px) {
  .page-shell {
    width: min(100% - 24px, 1180px);
    padding-top: 18px;
  }

  .intro-band,
  .download-guide__grid {
    grid-template-columns: 1fr;
  }

  .release-card {
    grid-template-columns: 1fr;
  }

  .release-card > div + div {
    border-left: 0;
    border-top: 1px solid var(--line);
  }

  .hero-visual {
    min-height: 540px;
  }

  .hero-visual__phone {
    left: 50%;
    right: auto;
    width: min(290px, 74%);
    transform: translateX(-50%);
  }

  .hero-visual__panel {
    width: min(220px, 50%);
  }

  .hero-visual__panel--top {
    top: 92px;
    left: 0;
  }

  .hero-visual__panel--bottom {
    right: 0;
    bottom: 34px;
  }

  .showcase,
  .download-guide,
  .search-copy,
  .release-layout {
    padding: 28px 20px;
  }
}

@media (max-width: 640px) {
  h1 {
    max-width: none;
    font-size: clamp(2.45rem, 12vw, 3.7rem);
  }

  .actions .button {
    width: 100%;
  }

  .hero {
    gap: 28px;
    padding: 18px 0 34px;
  }

  .hero-visual {
    min-height: 480px;
    padding: 20px 0 0;
  }

  .hero-visual__badge {
    left: 0;
  }

  .hero-visual__phone {
    width: min(258px, 72%);
    border-width: 8px;
    border-radius: 32px;
  }

  .hero-visual__panel {
    width: 170px;
    padding: 14px;
  }

  .hero-visual__panel strong {
    font-size: 1rem;
  }

  .hero-visual__panel span {
    font-size: 0.85rem;
  }

  .intro-band,
  .showcase,
  .download-guide,
  .search-copy,
  .release-layout {
    padding: 22px 16px;
  }

  .feature-card img {
    aspect-ratio: 16 / 15;
  }
}