:root {
  --bg: #f4f6fb;
  --bg-accent: #dde5f5;
  --paper: rgba(255, 255, 255, 0.92);
  --border: rgba(42, 61, 94, 0.12);
  --text: #1f2a3d;
  --muted: #5d6b82;
  --accent: #2878ff;
  --accent-dark: #1656c6;
  --accent-soft: #edf4ff;
  --shadow: 0 18px 40px rgba(28, 55, 104, 0.12);
}

* {
  box-sizing: border-box;
}

html {
  font-size: 16px;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at top left, rgba(255, 255, 255, 0.85), transparent 30%),
    linear-gradient(135deg, var(--bg) 0%, var(--bg-accent) 100%);
}

a {
  color: inherit;
}

.shell {
  width: min(1120px, calc(100% - 32px));
  margin: 0 auto;
  padding: 40px 0 72px;
}

.hero,
.panel,
.doc {
  background: var(--paper);
  border: 1px solid var(--border);
  border-radius: 24px;
  box-shadow: var(--shadow);
}

.hero {
  position: relative;
  padding: 44px;
  overflow: hidden;
}

.hero::after {
  content: "";
  position: absolute;
  right: -72px;
  bottom: -120px;
  width: 240px;
  height: 240px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(40, 120, 255, 0.14) 0%, rgba(40, 120, 255, 0) 72%);
  pointer-events: none;
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.4fr) minmax(280px, 0.8fr);
  gap: 24px;
  align-items: start;
}

.app-chip {
  display: flex;
  gap: 18px;
  align-items: center;
}

.app-icon {
  width: 84px;
  height: 84px;
  flex: 0 0 84px;
  border-radius: 22px;
  object-fit: cover;
  background: #eef3ff;
  box-shadow: 0 16px 28px rgba(40, 120, 255, 0.18);
}

.app-tagline {
  margin: 8px 0 0;
  color: var(--muted);
  font-size: 1rem;
}

.eyebrow {
  margin: 0 0 12px;
  color: var(--accent-dark);
  font-size: 0.9rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.hero h1,
.panel h2,
.doc h1,
.doc h2 {
  margin: 0;
  font-family: Georgia, "Times New Roman", serif;
}

.hero h1 {
  font-size: clamp(2.2rem, 4vw, 3.8rem);
  line-height: 1.05;
}

.lead,
.panel-head p,
.link-card p,
.doc p,
.doc li {
  color: var(--muted);
  line-height: 1.75;
}

.lead {
  max-width: 760px;
  margin: 18px 0 0;
  font-size: 1.05rem;
}

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

.download-button,
.secondary-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 52px;
  padding: 0 24px;
  border-radius: 16px;
  text-decoration: none;
  font-weight: 700;
}

.download-button {
  color: #fff;
  background: linear-gradient(135deg, var(--accent) 0%, var(--accent-dark) 100%);
  box-shadow: 0 14px 28px rgba(40, 120, 255, 0.28);
}

.download-button.wide {
  width: 100%;
}

.secondary-button {
  color: var(--accent-dark);
  background: var(--accent-soft);
  border: 1px solid rgba(40, 120, 255, 0.16);
  display: none;
}

.hero-meta {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 16px;
  margin-top: 28px;
}

.meta-card,
.link-card,
.feature-card,
.download-panel,
.screenshot-card {
  border-radius: 18px;
  border: 1px solid var(--border);
  background: rgba(255, 255, 255, 0.84);
}

.meta-card {
  padding: 18px 20px;
}

.download-panel {
  padding: 26px;
  background:
    radial-gradient(circle at top right, rgba(40, 120, 255, 0.16), transparent 38%),
    rgba(255, 255, 255, 0.86);
}

.panel-kicker {
  margin: 0;
  color: var(--accent-dark);
  font-size: 0.86rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.panel-title {
  display: block;
  margin-top: 10px;
  font-size: 1.5rem;
}

.panel-text {
  margin: 12px 0 20px;
  color: var(--muted);
  line-height: 1.7;
}

.download-info {
  display: grid;
  gap: 8px;
  margin-top: 16px;
  color: var(--muted);
  font-size: 0.95rem;
}

.download-info span,
.meta-card strong,
.path {
  overflow-wrap: anywhere;
}

.meta-label {
  display: block;
  margin-bottom: 8px;
  color: var(--muted);
  font-size: 0.92rem;
}

.meta-card strong {
  display: block;
  font-size: 1.05rem;
  line-height: 1.5;
}

.panel {
  margin-top: 24px;
  padding: 28px;
}

.panel-head {
  margin-bottom: 18px;
}

.panel-head h2 {
  font-size: 1.8rem;
}

.panel-head p {
  margin: 10px 0 0;
}

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 16px;
}

.feature-grid {
  display: grid;
  gap: 16px;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
}

.screenshot-grid {
  display: flex;
  gap: 14px;
  overflow-x: auto;
  overflow-y: hidden;
  padding: 4px 2px 10px;
  scroll-snap-type: x mandatory;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: thin;
  scrollbar-color: rgba(40, 120, 255, 0.45) rgba(40, 120, 255, 0.08);
}

.screenshot-grid::-webkit-scrollbar {
  height: 6px;
}

.screenshot-grid::-webkit-scrollbar-thumb {
  background: rgba(40, 120, 255, 0.45);
  border-radius: 999px;
}

.screenshot-grid::-webkit-scrollbar-track {
  background: rgba(40, 120, 255, 0.08);
  border-radius: 999px;
}

.link-card {
  display: block;
  padding: 22px;
  text-decoration: none;
  transition: transform 0.18s ease, border-color 0.18s ease, box-shadow 0.18s ease;
}

.link-card:hover,
.screenshot-card:hover {
  transform: translateY(-2px);
  border-color: rgba(40, 120, 255, 0.28);
  box-shadow: 0 16px 30px rgba(40, 120, 255, 0.12);
}

.link-card strong {
  display: block;
  font-size: 1.15rem;
}

.feature-card {
  padding: 22px;
}

.feature-card strong {
  display: block;
  font-size: 1.08rem;
}

.feature-card p {
  margin: 12px 0 0;
  color: var(--muted);
  line-height: 1.75;
}

.link-card p {
  margin: 12px 0;
}



.release-notes-only {
  margin-top: 0;
}

.release-notes h3 {
  margin: 0 0 12px;
  font-size: 1.1rem;
}

.release-notes ul {
  margin: 0;
  padding-left: 20px;
  color: var(--muted);
  line-height: 1.8;
}

.screenshot-card {
  margin: 0;
  padding: 0;
  flex: 0 0 clamp(190px, 28vw, 260px);
  border-radius: 24px;
  overflow: hidden;
  scroll-snap-align: start;
  transition: transform 0.18s ease, border-color 0.18s ease, box-shadow 0.18s ease;
}

.screenshot-card img {
  display: block;
  width: 100%;
  aspect-ratio: 9 / 19.5;
  object-fit: cover;
  border-radius: 0;
  background: #dfe8f8;
}

.screenshot-card figcaption {
  margin: 0;
  padding: 10px 8px 12px;
  color: var(--muted);
  font-size: 0.9rem;
  text-align: left;
  font-weight: 600;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.path {
  color: var(--accent-dark);
  font-size: 0.9rem;
  word-break: break-all;
}

.doc-wrap {
  width: min(900px, calc(100% - 32px));
  margin: 0 auto;
  padding: 32px 0 56px;
}

.doc {
  padding: 36px;
}

.doc h1 {
  font-size: clamp(2rem, 4vw, 3rem);
}

.doc h2 {
  margin-top: 30px;
  font-size: 1.3rem;
}

.doc .summary {
  padding: 16px 18px;
  border-left: 4px solid var(--accent);
  background: rgba(237, 244, 255, 0.72);
}

.doc ul {
  padding-left: 22px;
}

.doc .doc-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 18px;
  margin: 18px 0 26px;
  color: var(--muted);
}

@media (max-width: 920px) {
  .hero-grid {
    grid-template-columns: 1fr;
  }

  .download-panel {
    padding: 24px;
  }

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

@media (max-width: 720px) {
  body {
    background:
      radial-gradient(circle at top center, rgba(255, 255, 255, 0.82), transparent 44%),
      linear-gradient(180deg, #edf2fb 0%, #e6edf9 100%);
  }

  .shell,
  .doc-wrap {
    width: calc(100% - 20px);
  }

  .shell {
    padding: 16px 0 calc(104px + env(safe-area-inset-bottom));
  }

  .hero,
  .panel,
  .doc {
    padding: 18px 16px;
    border-radius: 20px;
  }

  .hero::after {
    right: -96px;
    bottom: -136px;
    width: 220px;
    height: 220px;
  }

  .hero h1 {
    font-size: clamp(1.9rem, 9.2vw, 2.45rem);
    line-height: 1.1;
  }

  .hero-grid {
    grid-template-columns: 1fr;
    gap: 14px;
  }

  .app-chip {
    align-items: center;
    gap: 12px;
  }

  .app-chip > div {
    width: 100%;
  }

  .app-icon {
    width: 72px;
    height: 72px;
    flex-basis: 72px;
    border-radius: 18px;
  }

  .eyebrow {
    margin-bottom: 8px;
    font-size: 0.82rem;
  }

  .app-tagline {
    margin-top: 6px;
    font-size: 0.95rem;
    line-height: 1.55;
  }

  .lead {
    margin-top: 12px;
    font-size: 0.95rem;
    line-height: 1.7;
  }

  .hero-actions {
    display: grid;
    grid-template-columns: 1fr;
    gap: 10px;
    margin-top: 16px;
    position: fixed;
    left: 10px;
    right: 10px;
    bottom: calc(10px + env(safe-area-inset-bottom));
    z-index: 40;
    padding: 10px;
    border-radius: 16px;
    border: 1px solid var(--border);
    background: rgba(245, 248, 255, 0.94);
    backdrop-filter: blur(8px);
    box-shadow: 0 14px 24px rgba(27, 53, 104, 0.18);
  }

  .download-button,
  .secondary-button {
    width: 100%;
    min-height: 48px;
  }

  .download-button {
    box-shadow: 0 10px 18px rgba(40, 120, 255, 0.24);
  }

  .download-panel {
    display: none;
  }

  .hero-meta {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 10px;
    margin-top: 16px;
  }

  .hero-meta .meta-card:nth-child(3),
  .hero-meta .meta-card:nth-child(4) {
    grid-column: 1 / -1;
  }

  .meta-label {
    margin-bottom: 6px;
    font-size: 0.84rem;
  }

  .meta-card strong {
    font-size: 1rem;
    line-height: 1.35;
  }

  .meta-card,
  .feature-card,
  .link-card,
  .download-panel {
    padding: 14px 12px;
  }

  .panel {
    margin-top: 14px;
  }

  .panel-head {
    margin-bottom: 14px;
  }

  .panel-head h2 {
    font-size: 1.32rem;
  }

  .panel-head p,
  .panel-text,
  .link-card p,
  .feature-card p,
  .release-notes ul,
  .doc p,
  .doc li {
    line-height: 1.7;
  }

  .grid,
  .feature-grid {
    grid-template-columns: 1fr;
    gap: 12px;
  }

  .screenshot-grid {
    gap: 10px;
    margin: 0 -2px;
    padding: 2px 2px 8px;
  }

  

.release-notes-only {
  margin-top: 0;
}

  .screenshot-card {
    flex-basis: min(66vw, 248px);
    border-radius: 20px;
  }

  .screenshot-card figcaption {
    padding: 8px 6px 10px;
    font-size: 0.86rem;
  }

  .doc .doc-meta {
    gap: 8px 14px;
  }
}

@media (max-width: 420px) {
  .shell,
  .doc-wrap {
    width: calc(100% - 16px);
    padding-top: 12px;
  }

  .hero,
  .panel,
  .doc {
    padding: 16px 14px;
    border-radius: 18px;
  }

  .hero h1 {
    font-size: clamp(1.76rem, 10.6vw, 2.18rem);
  }

  .hero-actions {
    left: 8px;
    right: 8px;
    bottom: calc(8px + env(safe-area-inset-bottom));
    grid-template-columns: 1fr;
    gap: 8px;
    padding: 8px;
  }

  .download-button,
  .secondary-button {
    min-height: 44px;
  }

  .screenshot-grid {
    gap: 8px;
  }

  .screenshot-card {
    flex-basis: 72vw;
  }

  .panel-title {
    font-size: 1.2rem;
  }
}