:root,
[data-theme="dark"] {
  --bg: #07090d;
  --bg-elevated: #0e131a;
  --surface: #121820;
  --surface-2: #171e28;
  --text: #eef3f8;
  --text-2: #b7c2cf;
  --muted: #8090a3;
  --line: rgba(255, 255, 255, 0.08);
  --accent: #3ddc97;
  --accent-2: #2bbf80;
  --accent-ink: #062416;
  --danger: #f87171;
  --shadow: 0 24px 60px rgba(0, 0, 0, 0.45);
  --nav-bg: rgba(7, 9, 13, 0.86);
  --banner-a: #0a1210;
  --banner-b: #101820;
  --card-hover: rgba(61, 220, 151, 0.12);
  color-scheme: dark;
}

[data-theme="light"] {
  --bg: #f7f8fa;
  --bg-elevated: #ffffff;
  --surface: #ffffff;
  --surface-2: #f0f2f5;
  --text: #111827;
  --text-2: #374151;
  --muted: #6b7280;
  --line: rgba(17, 24, 39, 0.08);
  --accent: #0f9f6e;
  --accent-2: #0b7f58;
  --accent-ink: #ffffff;
  --danger: #dc2626;
  --shadow: 0 18px 40px rgba(18, 23, 30, 0.08);
  --nav-bg: rgba(247, 248, 250, 0.92);
  --banner-a: #eef2f6;
  --banner-b: #e8eef2;
  --card-hover: transparent;
  color-scheme: light;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: "Microsoft YaHei UI", "Microsoft YaHei", "PingFang SC", "Hiragino Sans GB", "Segoe UI", sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.65;
  min-height: 100vh;
  font-size: 14px;
  font-weight: 400;
  text-rendering: auto;
  -webkit-font-smoothing: auto;
  -moz-osx-font-smoothing: auto;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
button, input, textarea, select { font: inherit; }

.wrap {
  width: min(1120px, calc(100% - 56px));
  margin: 0 auto;
}

.nav {
  position: sticky;
  top: 0;
  z-index: 40;
  backdrop-filter: blur(14px);
  background: var(--nav-bg);
  border-bottom: 1px solid var(--line);
}
.nav-inner {
  height: 88px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}
.logo {
  font-weight: 800;
  letter-spacing: 0.02em;
  font-size: 1.35rem;
  flex-shrink: 0;
  display: inline-flex;
  align-items: center;
  gap: 12px;
  min-width: 0;
}
.logo span { color: var(--accent); }
.logo-img {
  height: 48px;
  width: auto;
  max-width: 200px;
  object-fit: contain;
  display: block;
  flex-shrink: 0;
}
.logo-text {
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.nav-menu-btn { display: none !important; }
.nav-links {
  display: flex;
  align-items: center;
  gap: 8px 18px;
  color: var(--muted);
  font-size: 0.94rem;
  flex-wrap: wrap;
  justify-content: flex-end;
}
.nav-links a:hover,
.nav-links a.active { color: var(--text); }
.nav-links a.active { color: var(--accent); }
.icon-btn {
  width: 40px;
  height: 40px;
  border-radius: 12px;
  border: none;
  background: transparent;
  color: var(--text);
  cursor: pointer;
  display: grid;
  place-items: center;
}
.icon-btn:hover {
  background: color-mix(in srgb, var(--text) 6%, transparent);
}
.icon-btn svg {
  display: block;
}

.announce-bar {
  border: none;
  background: transparent;
}
.announce-inner {
  display: flex;
  align-items: center;
  gap: 14px;
  min-height: 40px;
  padding-top: 8px;
  padding-bottom: 8px;
}
.announce-label {
  flex-shrink: 0;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 2px 10px;
  border-radius: 3px;
  font-size: 12px;
  font-weight: 400;
  letter-spacing: 0.04em;
  color: #fff;
  background: var(--accent);
  line-height: 1.4;
}
.announce-viewport {
  flex: 1;
  min-width: 0;
  overflow: hidden;
  mask-image: linear-gradient(90deg, transparent, #000 18px, #000 calc(100% - 18px), transparent);
  -webkit-mask-image: linear-gradient(90deg, transparent, #000 18px, #000 calc(100% - 18px), transparent);
}
.announce-track {
  display: flex;
  width: max-content;
  animation: announce-marquee linear infinite;
  will-change: transform;
}
.announce-bar:hover .announce-track {
  animation-play-state: paused;
}
.announce-group {
  display: flex;
  align-items: center;
  flex-shrink: 0;
  gap: 0;
  padding-right: 48px;
  white-space: nowrap;
}
.announce-item {
  color: var(--text-2);
  font-size: 13px;
  font-weight: 400;
  line-height: 1.5;
  text-decoration: none;
}
a.announce-item:hover {
  color: var(--accent);
}
.announce-sep {
  margin: 0 18px;
  color: var(--muted);
  opacity: 0.7;
}
@keyframes announce-marquee {
  from { transform: translateX(0); }
  to { transform: translateX(-50%); }
}

.banner {
  position: relative;
  overflow: hidden;
  border-bottom: 1px solid var(--line);
  background: linear-gradient(120deg, var(--banner-a), var(--banner-b));
}
.banner-track {
  display: flex;
  transition: transform 0.55s cubic-bezier(.22, 1, .36, 1);
}
.banner-slide {
  min-width: 100%;
  min-height: clamp(320px, 26vw, 480px);
  padding: 72px 0 64px;
  position: relative;
  display: flex;
  align-items: center;
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
}
.banner-slide.has-image::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, rgba(7, 9, 13, 0.88) 10%, rgba(7, 9, 13, 0.55) 55%, rgba(7, 9, 13, 0.35));
  pointer-events: none;
}
[data-theme="light"] .banner-slide.has-image::before {
  background: linear-gradient(90deg, rgba(244, 246, 248, 0.92) 12%, rgba(244, 246, 248, 0.7) 55%, rgba(244, 246, 248, 0.4));
}
.banner-slide .wrap { position: relative; z-index: 1; }
.banner-slide .eyebrow {
  color: var(--accent);
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  margin-bottom: 18px;
}
.banner-slide h1 {
  font-size: clamp(2.2rem, 5vw, 3.6rem);
  line-height: 1.12;
  letter-spacing: -0.03em;
  font-weight: 800;
  max-width: 14em;
  margin-bottom: 16px;
}
.banner-slide p {
  color: var(--text-2);
  max-width: 36em;
  font-size: 1.05rem;
  margin-bottom: 28px;
}
.banner-dots {
  position: absolute;
  left: 50%;
  bottom: 18px;
  transform: translateX(-50%);
  display: flex;
  gap: 8px;
}
.banner-dots button {
  width: 8px;
  height: 8px;
  border-radius: 999px;
  border: none;
  background: var(--muted);
  opacity: 0.45;
  cursor: pointer;
}
.banner-dots button.on {
  opacity: 1;
  background: var(--accent);
  width: 22px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 20px;
  border-radius: 12px;
  font-weight: 700;
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform 0.15s ease, opacity 0.15s ease;
}
.btn:hover { transform: translateY(-1px); opacity: 0.94; }
.btn:disabled,
.btn[disabled] {
  opacity: 0.55;
  cursor: not-allowed;
  transform: none;
  pointer-events: none;
}
.btn-primary { background: var(--accent); color: var(--accent-ink); }
.btn-ghost {
  background: transparent;
  border-color: var(--line);
  color: var(--text);
}

.section { padding: 72px 0; }
.section-head {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 28px;
  flex-wrap: wrap;
}
.section-head h2 {
  font-size: clamp(1.6rem, 3vw, 2.1rem);
  font-weight: 800;
  letter-spacing: -0.02em;
}
.section-head p { color: var(--muted); }

/* 软件区 · 2026 干净平面 */
.apps-section {
  padding: 96px 0 120px;
  background: var(--bg);
}
.apps-head { margin-bottom: 12px; }
.apps-eyebrow {
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 14px;
}
.apps-section .section-head h2 {
  font-size: clamp(1.85rem, 3.4vw, 2.45rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  margin-bottom: 12px;
}
.apps-section .section-head p {
  font-size: 0.98rem;
  max-width: 32em;
  color: var(--muted);
  font-weight: 400;
}

.filters {
  display: flex;
  flex-wrap: wrap;
  gap: 4px 32px;
  margin: 28px 0 36px;
  padding-bottom: 0;
  border-bottom: none;
}
.chip {
  border: none;
  background: transparent;
  color: var(--muted);
  padding: 6px 0 8px;
  border-radius: 0;
  cursor: pointer;
  font-size: 0.92rem;
  font-weight: 400;
  position: relative;
  letter-spacing: 0.01em;
}
.chip:hover { color: var(--text); }
.chip.on {
  color: var(--text);
  background: transparent;
  font-weight: 600;
}
.chip.on::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 1.5px;
  background: var(--text);
  border-radius: 1px;
}

.apps-air {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 20px;
  align-items: stretch;
}
.apps-mag-loading {
  grid-column: 1 / -1;
  color: var(--muted);
  padding: 48px 0;
  font-size: 1rem;
}

.air-card {
  display: flex;
  flex-direction: column;
  height: 100%;
  min-height: 248px;
  padding: 28px 26px 22px;
  border-radius: 12px;
  border: 1px solid var(--line);
  background: var(--surface);
  text-decoration: none;
  color: inherit;
  box-shadow: none;
  transition: border-color 0.18s ease, background-color 0.18s ease;
}
.air-card:hover {
  border-color: color-mix(in srgb, var(--text) 22%, var(--line));
  box-shadow: none;
  background: var(--surface);
}
.air-card-head {
  display: flex;
  align-items: center;
  justify-content: flex-start;
  gap: 14px;
  margin-bottom: 20px;
  flex-shrink: 0;
}
.air-cover {
  width: 44px;
  height: 44px;
  border-radius: 10px;
  display: grid;
  place-items: center;
  font-size: 14px;
  font-weight: 400;
  color: var(--accent-ink);
  background: var(--surface-2);
  border: 1px solid var(--line);
  overflow: hidden;
  flex-shrink: 0;
}
.air-cover.has-icon {
  background: #0b1118;
  border-color: var(--line);
  padding: 0;
}
.air-cover img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}
.air-card h3 {
  font-size: 15px;
  font-weight: 600;
  letter-spacing: -0.01em;
  line-height: 1.4;
  margin: 0;
  text-align: left;
  flex: 1;
  min-width: 0;
  color: var(--text);
}
.air-card .tagline {
  color: var(--muted);
  font-size: 13px;
  font-weight: 400;
  line-height: 1.75;
  min-height: calc(1.75em * 3);
  max-width: none;
  margin: 0;
  padding: 0 0 6px;
  display: -webkit-box;
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 3;
  overflow: hidden;
  word-break: break-word;
  overflow-wrap: anywhere;
  flex: 1 1 auto;
}
.air-card-foot {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  margin-top: auto;
  padding-top: 18px;
  border-top: 1px solid var(--line);
  flex-shrink: 0;
}
.air-card-foot .go {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 7px 14px;
  border-radius: 8px;
  background: transparent;
  border: 1px solid var(--line);
  color: var(--text);
  font-size: 12px;
  font-weight: 400;
  letter-spacing: 0;
  line-height: 1.35;
  transition: border-color 0.18s ease, color 0.18s ease, background-color 0.18s ease;
}
.air-card:hover .go {
  filter: none;
  border-color: var(--accent);
  color: var(--accent);
  background: transparent;
}

/* 旧布局兜底隐藏 */
.app-grid, .app-card, .apps-mag, .mag-feature, .mag-list { display: none !important; }

.promo-section {
  padding: 28px 0 8px;
}
.promo-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}
.promo-card {
  display: block;
  padding: 26px 24px 24px;
  border-radius: 12px;
  border: 1px solid var(--line);
  background: var(--surface);
  text-decoration: none;
  color: inherit;
  transition: border-color 0.18s ease;
  box-shadow: none;
  min-height: 120px;
}
a.promo-card:hover {
  border-color: color-mix(in srgb, var(--text) 22%, var(--line));
}
.promo-card h3 {
  font-size: 16px;
  font-weight: 600;
  letter-spacing: -0.01em;
  margin: 0 0 10px;
  color: var(--text);
}
.promo-card p {
  margin: 0;
  font-size: 13px;
  line-height: 1.7;
  color: var(--muted);
}

.site-footer {
  border-top: 1px solid var(--line);
  background: transparent;
  padding: 40px 0 28px;
  margin-top: 8px;
}
.footer-top {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 28px 40px;
  flex-wrap: wrap;
  margin-bottom: 24px;
}
.footer-brand .logo {
  display: inline-flex;
  margin-bottom: 8px;
  font-size: 1.05rem;
}
.footer-brand .logo-img {
  height: 40px;
  max-width: 180px;
}
.footer-brand p {
  color: var(--muted);
  font-size: 0.88rem;
  max-width: 28em;
  line-height: 1.6;
}
.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 22px;
  align-items: center;
  justify-content: flex-end;
}
.footer-links a {
  color: var(--muted);
  font-size: 0.9rem;
}
.footer-links a:hover { color: var(--text); }
.footer-bottom {
  border-top: 1px solid var(--line);
  padding-top: 16px;
  color: var(--muted);
  font-size: 0.8rem;
}

/* product detail */
.page-hero {
  padding: 56px 0 36px;
  border-bottom: 1px solid var(--line);
  background: linear-gradient(180deg, var(--bg-elevated), var(--bg));
}
.page-hero .crumb { color: var(--muted); font-size: 0.88rem; margin-bottom: 14px; }
.page-hero .crumb a { color: var(--muted); text-decoration: none; }
.page-hero .crumb a:hover { color: var(--accent); }
.page-hero h1 {
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  margin-bottom: 10px;
}
.page-hero .lead { color: var(--text-2); font-size: 1.08rem; max-width: 40em; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 24px; }

/* contact — evolve current two-panel layout with brand presence */
.page-shell {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}
.page-shell > main { flex: 1 0 auto; }
.page-shell > #footerMount { flex-shrink: 0; }

.page-contact .contact-hero {
  position: relative;
  overflow: hidden;
  border-bottom: 1px solid var(--line);
  padding: 40px 0 32px;
  background: var(--bg);
}
.page-contact .contact-hero .wrap { position: relative; z-index: 1; }
.page-contact .contact-hero h1 {
  font-size: clamp(1.75rem, 3vw, 2.25rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  margin-bottom: 10px;
  color: var(--text);
}
.page-contact .contact-hero .lead {
  font-size: 0.95rem;
  max-width: 36em;
  line-height: 1.7;
  margin: 0;
}

.contact-section { padding: 8px 0 88px; }
.contact-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.35fr) minmax(260px, 0.75fr);
  gap: 20px;
  align-items: stretch;
}
.contact-card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 26px 26px 22px;
  box-shadow: 0 10px 28px rgba(15, 23, 42, 0.04);
  display: flex;
  flex-direction: column;
  min-height: 100%;
}
[data-theme="dark"] .contact-card {
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.28);
}
.contact-card-hd {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 18px;
}
.contact-card-hd-center { justify-content: center; }
.contact-card-mark {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 0 4px color-mix(in srgb, var(--accent) 18%, transparent);
  flex: none;
}
.contact-card h2 {
  font-size: 0.95rem;
  font-weight: 700;
  margin: 0;
  color: var(--text);
  letter-spacing: -0.01em;
}
.contact-rows { flex: 1; }
.contact-row {
  display: grid;
  grid-template-columns: 76px minmax(0, 1fr);
  gap: 12px;
  padding: 14px 0;
  border-bottom: 1px solid var(--line);
  align-items: center;
}
.contact-row:last-of-type { border-bottom: none; }
.contact-k {
  color: var(--muted);
  font-size: 0.82rem;
  font-weight: 500;
}
.contact-v {
  color: var(--text);
  font-size: 0.95rem;
  font-weight: 600;
  word-break: break-word;
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
  justify-content: space-between;
}
.contact-v a {
  color: var(--accent);
  text-decoration: none;
  font-weight: 650;
}
.contact-v a:hover { text-decoration: underline; }
.contact-copy {
  flex: none;
  border: 1px solid var(--line);
  background: transparent;
  color: var(--muted);
  border-radius: 8px;
  padding: 4px 10px;
  font-size: 0.75rem;
  font-weight: 600;
  cursor: pointer;
  transition: border-color 0.15s ease, color 0.15s ease, background 0.15s ease;
}
.contact-copy:hover,
.contact-copy.on {
  border-color: color-mix(in srgb, var(--accent) 45%, var(--line));
  color: var(--accent);
  background: color-mix(in srgb, var(--accent) 8%, transparent);
}
.contact-note {
  margin: 16px 0 0;
  padding-top: 16px;
  border-top: 1px solid var(--line);
  color: var(--text-2);
  font-size: 0.86rem;
  line-height: 1.7;
}
.contact-empty { color: var(--muted); font-size: 0.9rem; margin: 0; }
.contact-qr { text-align: center; align-items: center; }
.contact-qr-frame {
  width: min(200px, 100%);
  margin: 4px auto 14px;
  padding: 12px;
  border-radius: 14px;
  background: #fff;
  border: 1px solid color-mix(in srgb, var(--accent) 28%, var(--line));
  box-shadow: 0 0 0 4px color-mix(in srgb, var(--accent) 8%, transparent);
}
.contact-qr-frame img {
  width: 100%;
  margin: 0;
  border: none;
  border-radius: 4px;
  background: #fff;
}
.contact-qr > p {
  margin: 0;
  color: var(--muted);
  font-size: 0.82rem;
  line-height: 1.5;
}
@media (max-width: 860px) {
  .contact-layout { grid-template-columns: 1fr; }
  .page-contact .contact-hero { padding: 36px 0 28px; }
  .contact-section { padding-bottom: 64px; }
}

.feature-list { display: flex; flex-direction: column; gap: 0; }
.feature-block {
  display: grid;
  grid-template-columns: 1fr 1.05fr;
  gap: 40px;
  align-items: center;
  padding: 56px 0;
  border-bottom: 1px solid var(--line);
}
.feature-block:nth-child(even) .feature-copy { order: 2; }
.feature-index {
  color: var(--accent);
  font-weight: 800;
  letter-spacing: 0.08em;
  margin-bottom: 10px;
  font-size: 0.85rem;
}
.feature-block h2 { font-size: 1.7rem; font-weight: 800; margin-bottom: 8px; }
.feature-block .sub { color: var(--muted); margin-bottom: 12px; }
.feature-block p { color: var(--text-2); }
.feature-visual {
  min-height: 240px;
  border-radius: 18px;
  border: 1px solid var(--line);
  background:
    radial-gradient(circle at 30% 20%, color-mix(in srgb, var(--accent) 18%, transparent), transparent 45%),
    var(--surface);
  position: relative;
  overflow: hidden;
}
.demo-panel {
  position: absolute;
  inset: 18% 12% auto;
  border-radius: 12px;
  border: 1px solid color-mix(in srgb, var(--accent) 35%, var(--line));
  background: var(--bg-elevated);
  padding: 14px;
  box-shadow: var(--shadow);
}
.demo-row {
  height: 12px;
  border-radius: 6px;
  background: var(--surface-2);
  margin-bottom: 8px;
}
.demo-row.on {
  background: color-mix(in srgb, var(--accent) 28%, var(--surface-2));
  width: 78%;
}
.demo-row.short { width: 55%; }

.shot-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
}
.shot-card {
  border: 1px solid var(--line);
  border-radius: 16px;
  overflow: hidden;
  background: var(--surface);
}
.shot-frame {
  aspect-ratio: 16 / 10;
  background: var(--surface-2);
  display: grid;
  place-items: center;
  color: var(--muted);
  font-size: 0.9rem;
}
.shot-card img { width: 100%; height: 100%; object-fit: cover; }
.shot-body { padding: 14px 16px 16px; }
.shot-body h3 { font-size: 1rem; margin-bottom: 4px; }
.shot-body p { color: var(--muted); font-size: 0.88rem; }

.price-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
}
.price-card {
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 20px;
  background: var(--surface);
}
.price-card.hot {
  border-color: color-mix(in srgb, var(--accent) 50%, transparent);
  background: linear-gradient(165deg, var(--card-hover), var(--surface) 50%);
}
.price-card h3 { font-size: 1.05rem; margin-bottom: 10px; }
.price-card .amount {
  font-size: 2rem;
  font-weight: 800;
  font-variant-numeric: tabular-nums;
  font-family: inherit;
}
.price-card .unit { color: var(--muted); font-size: 0.88rem; margin-left: 6px; }
.price-card p { color: var(--muted); font-size: 0.9rem; margin: 10px 0 16px; }

.buy-box, .panel {
  border: 1px solid var(--line);
  border-radius: 18px;
  background: var(--surface);
  padding: 24px;
}
.field { margin-bottom: 14px; }
.field label { display: block; color: var(--muted); font-size: 0.85rem; margin-bottom: 6px; }
.field input, .field textarea, .field select {
  width: 100%;
  padding: 12px 14px;
  border-radius: 12px;
  border: 1px solid var(--line);
  background: var(--bg-elevated);
  background-color: var(--bg-elevated);
  color: var(--text);
  -webkit-text-fill-color: var(--text);
  outline: none;
  min-height: 48px;
  line-height: 1.4;
  appearance: auto;
  color-scheme: inherit;
}
.field input::placeholder,
.field textarea::placeholder {
  color: var(--muted);
  -webkit-text-fill-color: var(--muted);
  opacity: 1;
}
.field input::-webkit-input-placeholder,
.field textarea::-webkit-input-placeholder {
  color: var(--muted);
  -webkit-text-fill-color: var(--muted);
  opacity: 1;
}
.field select option,
.field select optgroup {
  color: var(--text);
  background-color: var(--surface);
}
.err { color: var(--danger); font-size: 0.9rem; margin-top: 8px; }
.qr-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.qr {
  aspect-ratio: 1;
  border-radius: 14px;
  border: 1px solid var(--line);
  background: #fff;
  display: grid;
  place-items: center;
  overflow: hidden;
}
.qr img { width: 100%; height: 100%; object-fit: contain; }
.qr span { color: #64748b; font-size: 0.85rem; text-align: center; padding: 10px; }
.hidden { display: none !important; }

@media (min-width: 1280px) {
  .apps-air { grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 32px; }
}
@media (max-width: 1100px) {
  .apps-air { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 22px; }
}
@media (max-width: 960px) {
  .footer-top { flex-direction: column; }
  .footer-links { justify-content: flex-start; }
  .promo-grid { grid-template-columns: 1fr; }
  .feature-block,
  .feature-block:nth-child(even) {
    grid-template-columns: 1fr;
  }
  .feature-block:nth-child(even) .feature-copy { order: unset; }
  .price-grid { grid-template-columns: 1fr; }
  .shot-grid { grid-template-columns: 1fr; }
  .apps-air { grid-template-columns: 1fr; gap: 16px; }
  .air-card { min-height: 220px; padding: 22px 18px 18px; border-radius: 10px; }
  .air-cover { width: 40px; height: 40px; border-radius: 8px; }
  .air-card-head { gap: 12px; margin-bottom: 16px; }
  .air-card h3 { font-size: 14px; }
  .air-card .tagline { font-size: 13px; line-height: 1.7; min-height: calc(1.7em * 3); padding: 0 0 4px; }
  .air-card-foot { padding-top: 14px; }
  .air-card-foot .go { padding: 6px 12px; font-size: 12px; border-radius: 7px; }
}
@media (max-width: 640px) {
  .qr-grid { grid-template-columns: 1fr; }
  .nav-menu-btn { display: grid !important; }
  .nav-links {
    display: none;
    position: absolute;
    left: 0;
    right: 0;
    top: 88px;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 8px 0 12px;
    background: var(--nav-bg);
    backdrop-filter: blur(14px);
    border-bottom: 1px solid var(--line);
  }
  body.nav-open .nav-links {
    display: flex;
  }
  .nav-links a {
    padding: 12px max(28px, calc((100% - min(1120px, calc(100% - 56px))) / 2));
    color: var(--text);
  }
  .nav-links .theme-only {
    margin: 6px max(28px, calc((100% - min(1120px, calc(100% - 56px))) / 2)) 0;
    width: 40px;
  }
  .nav { position: sticky; }
  .banner-slide { padding: 48px 0 56px; min-height: 280px; }
  .filters { gap: 6px 18px; margin-bottom: 28px; }
  .apps-section { padding: 56px 0 72px; }
  .promo-section { padding: 20px 0 4px; }
}