:root {
  --bg: #f5f6f8;
  --surface: #ffffff;
  --surface-2: #f8f9fb;
  --text: #0f1419;
  --muted: #5c6673;
  --faint: #8a94a1;
  --line: rgba(15, 20, 25, 0.08);
  --line-strong: rgba(15, 20, 25, 0.14);
  --accent: #0a84ff;
  --accent-2: #6e5cff;
  --accent-soft: rgba(10, 132, 255, 0.10);
  --shadow: 0 12px 40px rgba(15, 20, 25, 0.07);
  --shadow-hover: 0 22px 60px rgba(15, 20, 25, 0.14);
  --radius: 22px;
  --radius-sm: 14px;
  --max: 1120px;
  --ease: cubic-bezier(.2, .7, .2, 1);
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0b0d10;
    --surface: #15191f;
    --surface-2: #1a1f26;
    --text: #f2f5f8;
    --muted: #9aa6b2;
    --faint: #6f7b87;
    --line: rgba(255, 255, 255, 0.09);
    --line-strong: rgba(255, 255, 255, 0.16);
    --accent: #4da3ff;
    --accent-2: #a08cff;
    --accent-soft: rgba(77, 163, 255, 0.14);
    --shadow: 0 12px 40px rgba(0, 0, 0, 0.35);
    --shadow-hover: 0 22px 60px rgba(0, 0, 0, 0.5);
  }
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI",
    "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC",
    sans-serif;
  color: var(--text);
  background:
    radial-gradient(1100px 620px at 12% -12%, rgba(10, 132, 255, 0.10), transparent 60%),
    radial-gradient(900px 520px at 92% 0%, rgba(110, 92, 255, 0.10), transparent 55%),
    var(--bg);
  background-attachment: fixed;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

::selection { background: var(--accent-soft); }

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; text-underline-offset: 3px; }

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

.container {
  width: min(var(--max), calc(100% - 48px));
  margin: 0 auto;
}

/* ---------- header ---------- */

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: var(--bg);
  background: color-mix(in srgb, var(--bg) 78%, transparent);
  backdrop-filter: saturate(180%) blur(18px);
  -webkit-backdrop-filter: saturate(180%) blur(18px);
  border-bottom: 1px solid var(--line);
}

.header-inner {
  display: flex;
  align-items: center;
  gap: 24px;
  height: 66px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--text);
  font-weight: 650;
  letter-spacing: -0.01em;
  white-space: nowrap;
}

.brand:hover { text-decoration: none; }

.brand-mark {
  width: 32px;
  height: 32px;
  border-radius: 10px;
  display: grid;
  place-items: center;
  color: #fff;
  font-size: 16px;
  font-weight: 700;
  background: linear-gradient(140deg, var(--accent), var(--accent-2));
  box-shadow: 0 6px 18px var(--accent-soft);
}

.brand em {
  font-style: normal;
  font-weight: 450;
  color: var(--muted);
  font-size: 0.86em;
}

.nav {
  display: flex;
  align-items: center;
  gap: 22px;
  margin-left: auto;
  font-size: 0.92rem;
}

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

.lang {
  font-size: 0.86rem;
  color: var(--muted);
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  padding: 5px 12px;
  white-space: nowrap;
}

.lang:hover { color: var(--text); text-decoration: none; border-color: var(--text); }

/* ---------- hero ---------- */

.hero {
  position: relative;
  padding: 96px 0 72px;
  overflow: hidden;
}

.hero::before {
  content: "";
  position: absolute;
  inset: -30% -10% auto -10%;
  height: 620px;
  background:
    radial-gradient(42% 55% at 22% 32%, rgba(10, 132, 255, 0.16), transparent 62%),
    radial-gradient(38% 50% at 78% 22%, rgba(110, 92, 255, 0.15), transparent 62%);
  filter: blur(28px);
  pointer-events: none;
  z-index: -1;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin: 0 0 18px;
  font-size: 0.82rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent);
}

.eyebrow::before {
  content: "";
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: currentColor;
  box-shadow: 0 0 0 4px var(--accent-soft);
}

.hero h1 {
  margin: 0 0 20px;
  font-size: clamp(2.6rem, 6.4vw, 4.6rem);
  line-height: 1.04;
  letter-spacing: -0.045em;
  font-weight: 720;
  max-width: 14em;
}

.hero .lead {
  margin: 0;
  max-width: 40em;
  font-size: clamp(1.02rem, 1.6vw, 1.18rem);
  color: var(--muted);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 32px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 20px;
  border-radius: 999px;
  font-size: 0.95rem;
  font-weight: 600;
  border: 1px solid transparent;
  background: var(--text);
  color: var(--bg);
  transition: transform .25s var(--ease), box-shadow .25s var(--ease), opacity .2s;
}

.btn:hover {
  transform: translateY(-1px);
  box-shadow: var(--shadow);
  text-decoration: none;
}

.btn.ghost {
  background: transparent;
  color: var(--text);
  border-color: var(--line-strong);
}

.btn.ghost:hover { background: var(--surface); }

.stats {
  display: flex;
  flex-wrap: wrap;
  gap: 28px 44px;
  margin-top: 56px;
  padding-top: 28px;
  border-top: 1px solid var(--line);
}

.stat strong {
  display: block;
  font-size: 1.5rem;
  letter-spacing: -0.02em;
}

.stat span { color: var(--muted); font-size: 0.88rem; }

/* ---------- sections ---------- */

.section-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 20px;
  margin: 24px 0 26px;
}

.section-head h2 {
  margin: 0;
  font-size: clamp(1.5rem, 2.6vw, 2rem);
  letter-spacing: -0.035em;
}

.section-head p {
  margin: 0;
  color: var(--muted);
  font-size: 0.92rem;
}

.filters {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0 0 24px;
}

.filter {
  border: 1px solid var(--line-strong);
  background: transparent;
  color: var(--muted);
  border-radius: 999px;
  padding: 7px 14px;
  font: inherit;
  font-size: 0.86rem;
  cursor: pointer;
  transition: all .2s var(--ease);
}

.filter:hover { color: var(--text); border-color: var(--text); }

.filter.active {
  background: var(--text);
  color: var(--bg);
  border-color: var(--text);
}

/* ---------- app grid ---------- */

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 18px;
  padding-bottom: 72px;
}

.card {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 16px;
  padding: 22px;
  border-radius: var(--radius);
  background: var(--surface);
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
  color: var(--text);
  transition: transform .3s var(--ease), box-shadow .3s var(--ease), border-color .3s;
  overflow: hidden;
}

.card::after {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
  background: linear-gradient(135deg, rgba(255,255,255,.06), transparent 45%);
  pointer-events: none;
}

.card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-hover);
  border-color: var(--line-strong);
  text-decoration: none;
}

.card-top {
  display: flex;
  align-items: center;
  gap: 14px;
}

.app-icon {
  width: 68px;
  height: 68px;
  border-radius: 18px;
  object-fit: cover;
  box-shadow: 0 8px 20px rgba(15, 20, 25, 0.14);
  flex: none;
}

.card h3 {
  margin: 0;
  font-size: 1.08rem;
  letter-spacing: -0.02em;
}

.app-sub {
  margin: 3px 0 0;
  color: var(--muted);
  font-size: 0.86rem;
}

.tagline {
  margin: 0;
  color: var(--muted);
  font-size: 0.94rem;
  min-height: 3.1em;
}

.pills {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 7px;
  margin-top: auto;
}

.pill {
  font-size: 0.76rem;
  color: var(--muted);
  background: var(--surface-2);
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 4px 10px;
  white-space: nowrap;
}

.pill.solid {
  background: var(--accent-soft);
  border-color: transparent;
  color: var(--accent);
  font-weight: 600;
}

.price {
  margin-left: auto;
  font-size: 0.82rem;
  color: var(--faint);
}

.arrow {
  font-size: 0.9rem;
  color: var(--faint);
  transition: transform .25s var(--ease), color .2s;
}

.card:hover .arrow { transform: translateX(3px); color: var(--accent); }

/* ---------- app detail ---------- */

.page-head { padding: 44px 0 8px; }

.breadcrumb {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--muted);
  font-size: 0.88rem;
}

.breadcrumb:hover { color: var(--text); text-decoration: none; }

.app-hero {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 300px;
  gap: 48px;
  align-items: center;
  padding: 40px 0 56px;
}

.app-icon-lg {
  width: 104px;
  height: 104px;
  border-radius: 26px;
  object-fit: cover;
  box-shadow: 0 16px 40px rgba(15, 20, 25, 0.18);
  margin-bottom: 22px;
}

.app-hero h1 {
  margin: 0 0 8px;
  font-size: clamp(2rem, 4.6vw, 3.2rem);
  line-height: 1.1;
  letter-spacing: -0.045em;
}

.app-hero .app-sub {
  margin: 0 0 14px;
  font-size: 1.05rem;
}

.app-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0 0 26px;
}

.app-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.qr-card {
  background: #ffffff;
  border-radius: var(--radius);
  padding: 22px;
  text-align: center;
  box-shadow: var(--shadow);
  color: #111111;
}

.qr-card img {
  width: 100%;
  max-width: 220px;
  margin: 0 auto 12px;
  border-radius: 8px;
}

.qr-card p {
  margin: 0;
  font-size: 0.82rem;
  color: #5c6673;
}

.qr-card strong {
  display: block;
  font-size: 0.95rem;
  color: #111111;
  margin-bottom: 2px;
}

/* ---------- screenshots ---------- */

.shots { padding: 8px 0 56px; }

.shot-strip {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  overflow-x: auto;
  overscroll-behavior-x: contain;
  -webkit-overflow-scrolling: touch;
  padding: 4px 4px 18px;
  scroll-snap-type: x mandatory;
  scrollbar-width: thin;
}

.shot-strip > a {
  flex: none;
  display: block;
  line-height: 0;
  scroll-snap-align: start;
}

.shot {
  flex: none;
  height: 420px;
  width: auto;
  max-width: none;
  border-radius: 18px;
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
  scroll-snap-align: start;
  background: var(--surface);
}

/* ---------- about ---------- */

.about {
  display: grid;
  grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr);
  gap: 56px;
  padding: 24px 0 80px;
  border-top: 1px solid var(--line);
}

.about h2 {
  margin: 0 0 18px;
  font-size: clamp(1.4rem, 2.4vw, 1.85rem);
  letter-spacing: -0.03em;
}

.about p { margin: 0 0 14px; color: var(--muted); }

.features {
  display: grid;
  gap: 14px;
  margin: 26px 0 0;
  padding: 0;
  list-style: none;
}

.features li {
  padding: 16px 18px;
  border-radius: var(--radius-sm);
  background: var(--surface-2);
  border: 1px solid var(--line);
}

.features strong { display: block; margin-bottom: 3px; }
.features span { color: var(--muted); font-size: 0.9rem; }

.side-card {
  padding: 22px;
  border-radius: var(--radius);
  background: var(--surface);
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
  align-self: start;
}

.side-card h3 { margin: 0 0 12px; font-size: 1rem; }

.side-card dl { margin: 0; display: grid; gap: 10px; }
.side-card dt { color: var(--faint); font-size: 0.78rem; }
.side-card dd { margin: 0; font-size: 0.92rem; }
.side-card .links { margin-top: 18px; display: grid; gap: 8px; font-size: 0.9rem; }

/* ---------- legal ---------- */

.legal {
  max-width: 760px;
  margin: 0 auto;
  padding: 48px 0 88px;
}

.legal h1 {
  margin: 8px 0 6px;
  font-size: clamp(1.7rem, 3.4vw, 2.3rem);
  letter-spacing: -0.035em;
}

.legal-meta {
  margin: 0 0 30px;
  color: var(--faint);
  font-size: 0.86rem;
}

.legal h2 {
  margin: 40px 0 10px;
  font-size: 1.18rem;
  letter-spacing: -0.02em;
}

.legal h3 {
  margin: 24px 0 6px;
  font-size: 1rem;
}

.legal p, .legal li { color: var(--muted); }
.legal p { margin: 0 0 12px; }
.legal ul { margin: 0 0 16px; padding-left: 22px; }
.legal li { margin: 6px 0; }

.legal table {
  width: 100%;
  border-collapse: collapse;
  margin: 12px 0 20px;
  font-size: 0.9rem;
}

.legal th, .legal td {
  text-align: left;
  vertical-align: top;
  padding: 10px 12px;
  border-bottom: 1px solid var(--line);
}

.legal th { color: var(--text); font-weight: 600; }
.legal td { color: var(--muted); }

.legal strong { color: var(--text); }

.legal-index { padding: 8px 0 80px; }

.legal-list {
  display: grid;
  gap: 12px;
  margin-top: 24px;
}

.legal-item {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 18px 20px;
  border-radius: var(--radius-sm);
  background: var(--surface);
  border: 1px solid var(--line);
  color: var(--text);
}

.legal-item:hover {
  text-decoration: none;
  border-color: var(--line-strong);
  box-shadow: var(--shadow);
}

.legal-item img {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  flex: none;
}

.legal-item strong { display: block; }
.legal-item span { color: var(--muted); font-size: 0.86rem; }

/* ---------- changelog ---------- */

.changelog-head {
  display: flex;
  align-items: flex-start;
  gap: 28px;
  padding: 32px 0 40px;
  border-bottom: 1px solid var(--line);
}

.changelog-head .app-icon-lg {
  margin-bottom: 0;
  flex: none;
}

.changelog-head h1 {
  margin: 4px 0 10px;
  font-size: clamp(2rem, 4.6vw, 3rem);
  line-height: 1.1;
  letter-spacing: -0.045em;
}

.changelog-head .lead {
  margin: 0 0 18px;
  max-width: 46em;
  color: var(--muted);
}

.changelog-list { padding: 8px 0 80px; }

.release {
  display: grid;
  grid-template-columns: 180px minmax(0, 1fr);
  gap: 32px;
  padding: 26px 0;
  border-bottom: 1px solid var(--line);
}

.release:last-child { border-bottom: 0; }

.release-meta {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 6px;
}

.release-version {
  display: flex;
  align-items: center;
  gap: 8px;
  margin: 0;
  font-size: 1.3rem;
  font-weight: 700;
  letter-spacing: -0.03em;
}

.release-version .pill { font-weight: 600; }

.release-date {
  color: var(--faint);
  font-size: 0.86rem;
}

.release-platforms {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 2px;
}

.release-body ul { margin: 0; padding-left: 20px; }
.release-body li { margin: 6px 0; color: var(--muted); }
.release-body p { margin: 0; color: var(--muted); }

@media (max-width: 720px) {
  .changelog-head { flex-direction: column; gap: 18px; padding-top: 24px; }
  .release { grid-template-columns: 1fr; gap: 12px; padding: 22px 0; }
  .release-meta {
    flex-direction: row;
    align-items: baseline;
    flex-wrap: wrap;
    gap: 6px 14px;
  }
  .release-version { font-size: 1.15rem; }
}

/* ---------- footer ---------- */

.site-footer {
  border-top: 1px solid var(--line);
  padding: 34px 0 46px;
  color: var(--muted);
  font-size: 0.86rem;
}

.footer-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
}

.footer-inner a { color: var(--muted); }
.footer-inner a:hover { color: var(--text); }

.footer-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 18px;
  margin-top: 10px;
  font-size: 0.78rem;
  color: var(--faint);
}

.footer-meta a { color: var(--faint); }
.footer-meta a:hover { color: var(--text); }

/* ---------- motion ---------- */

@media (prefers-reduced-motion: no-preference) {
  .hero h1, .hero .lead, .hero-actions, .stats {
    animation: rise .7s var(--ease) both;
  }
  .hero .lead { animation-delay: .06s; }
  .hero-actions { animation-delay: .12s; }
  .stats { animation-delay: .18s; }

  @keyframes rise {
    from { opacity: 0; transform: translateY(14px); }
    to { opacity: 1; transform: none; }
  }
}

/* ---------- responsive ---------- */

@media (max-width: 860px) {
  .app-hero { grid-template-columns: 1fr; gap: 32px; }
  .qr-card { max-width: 280px; }
  .about { grid-template-columns: 1fr; gap: 32px; }
  .shot { height: 360px; }
}

@media (max-width: 560px) {
  .container { width: min(var(--max), calc(100% - 32px)); }
  .header-inner { height: 60px; gap: 12px; }
  .brand em { display: none; }
  .nav { gap: 14px; }
  .nav a[href$="/legal/"], .nav a[href$="/en/legal/"] { display: none; }
  .hero { padding: 64px 0 52px; }
  .stats { gap: 20px 28px; }
  .grid { grid-template-columns: 1fr; }
  .shot { height: 300px; }
  .app-icon-lg { width: 88px; height: 88px; border-radius: 22px; }
}