:root {
  color: #101525;
  background: #fff;
  font: 16px/1.55 system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --ink: #101525;
  --muted: #465164;
  --rule: #d6d9de;
  --accent: #143ac7;
  --panel: #e2ebfc;
}
* { box-sizing: border-box; }
body { margin: 0; }
a { color: inherit; }
a:focus-visible { outline: 3px solid #174ed4; outline-offset: 5px; }
img { display: block; max-width: 100%; }
.wrap { width: min(100% - 6rem, 1340px); margin-inline: auto; }
.skip { position: fixed; z-index: 2; top: 1rem; left: 1rem; padding: .6rem 1rem; background: #fff; transform: translateY(-200%); }
.skip:focus { transform: translateY(0); }
.site-header { border-bottom: 1px solid #edeef1; }
.header-inner, .footer-inner { display: flex; align-items: center; justify-content: space-between; min-height: 65px; gap: 1rem; }
.brand { display: inline-flex; align-items: center; gap: .65rem; font-size: 1.35rem; font-weight: 750; letter-spacing: -.035em; text-decoration: none; white-space: nowrap; }
.brand img { border-radius: 7px; }
nav { display: flex; gap: 1.4rem; align-items: center; font-weight: 650; }
nav a, .site-footer a { text-decoration: none; }
nav a:hover, .site-footer a:hover { text-decoration: underline; text-underline-offset: .22em; }
.language { border-left: 1px solid var(--rule); padding-left: 1.4rem; white-space: nowrap; }
.gridnook { --panel: #ede8fb; --accent: #4d31a9; }
.ventodial { --panel: #e0eff2; --accent: #105471; }
.sonavometer { --panel: #e4f1ef; --accent: #07614f; }
.hero { background: #f8f7f3; }
.hero-inner { display: grid; grid-template-columns: 1fr 1.09fr; align-items: center; gap: clamp(2rem, 4.2vw, 5rem); padding-block: 2rem; }
.hero-copy { min-width: 0; padding-block: .75rem; }
.product-name { display: flex; align-items: center; gap: 1.25rem; margin-bottom: 1.4rem; }
.product-name img { border-radius: 22%; }
.product-name strong { font-size: clamp(1.65rem, 2.7vw, 2.25rem); line-height: 1.12; letter-spacing: -.04em; }
h1, h2, p, figure { margin: 0; }
h1 { font-size: clamp(2.2rem, 4.1vw, 4rem); line-height: 1.04; letter-spacing: -.055em; text-wrap: balance; }
html[lang="zh-CN"] h1 { letter-spacing: -.025em; line-height: 1.18; }
.hero-copy p, .directory-intro p { font-size: clamp(1.06rem, 1.6vw, 1.28rem); color: var(--muted); max-width: 40ch; margin-top: 1rem; }
.actions { display: flex; gap: .75rem; flex-wrap: wrap; margin-top: 1.85rem; }
.pill { display: inline-flex; align-items: center; justify-content: center; gap: .65rem; border-radius: 50px; padding: .76rem 1.35rem; background: var(--accent); color: #fff; text-decoration: none; font-weight: 700; min-height: 46px; }
.pill:hover { filter: brightness(.87); }
.pill svg, .card-action svg { width: 1.15rem; height: 1.15rem; }
.hero-media { min-width: 0; display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); align-items: center; justify-items: center; gap: clamp(.75rem, 2.4vw, 2rem); border-radius: 1.3rem; background: var(--panel); padding: clamp(.9rem, 2.1vw, 1.7rem) clamp(.9rem, 4.1vw, 4rem); }
.hero-media img { width: 100%; height: auto; max-width: 227px; aspect-ratio: 9 / 16; object-fit: contain; border-radius: .8rem; box-shadow: 0 6px 17px #18234020; }
.features { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); border-block: 1px solid var(--rule); padding-block: 1.3rem; margin-block: 1.3rem 0; }
.features > div { padding: .25rem clamp(1rem, 2.6vw, 2.5rem) .45rem; }
.features > div + div { border-left: 1px solid var(--rule); }
.feature-number { color: var(--accent); font-size: .77rem; font-weight: 750; letter-spacing: .08em; }
.features h2 { font-size: clamp(1.15rem, 2vw, 1.55rem); line-height: 1.23; letter-spacing: -.025em; margin-block: .3rem .45rem; }
.features p, .gallery figcaption, .note { color: var(--muted); }
.gallery { padding-block: 1.5rem 3.25rem; scroll-margin-top: 1rem; }
.gallery > h2 { font-size: clamp(1.65rem, 2.7vw, 2.35rem); letter-spacing: -.04em; margin-bottom: 1rem; }
.gallery-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 1rem; }
.gallery figure { min-width: 0; }
.gallery figure a { display: grid; place-items: center; background: var(--panel); border-radius: .8rem; padding: .8rem; }
.gallery figure img { aspect-ratio: 9 / 16; width: min(100%, 210px); height: auto; object-fit: contain; border-radius: .38rem; }
.gallery figcaption { margin-top: .55rem; font-size: .9rem; }
.note { margin-top: 1.35rem; font-size: .95rem; }
.product-links { display: flex; flex-wrap: wrap; gap: .65rem 1.2rem; margin-top: 1.35rem; }
.product-links a { color: var(--accent); text-underline-offset: .2em; }
.site-footer { border-top: 1px solid var(--rule); background: #f8f7f3; }
.directory { padding-block: clamp(2.5rem, 6vw, 5rem); }
.directory-intro { margin-bottom: 2.25rem; }
.app-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 1rem; }
.app-card { background: var(--panel, #e2ebfc); border-radius: 1rem; min-width: 0; }
.app-card.drawpiko { --panel: #f3eee7; }
.app-card-link { display: flex; flex-direction: column; align-items: flex-start; gap: .8rem; min-height: 100%; padding: 1.5rem; border-radius: inherit; text-decoration: none; }
.app-card-link:hover .card-action { text-decoration: underline; text-underline-offset: .22em; }
.app-card img { border-radius: 22%; }
.app-card h2 { font-size: 1.32rem; letter-spacing: -.027em; margin-bottom: .28rem; }
.app-card p { color: var(--muted); }
.card-action { display: inline-flex; align-items: center; gap: .5rem; color: var(--accent); font-weight: 650; padding-top: .35rem; margin-top: auto; }
@media (max-width: 900px) {
  .wrap { width: calc(100% - 3rem); }
  .app-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 650px) {
  .wrap { width: calc(100% - 2rem); }
  .header-inner, .footer-inner { min-height: 58px; }
  nav { gap: .75rem; font-size: .9rem; }
  .language { padding-left: .75rem; }
  .hero-inner { grid-template-columns: minmax(0, 1fr); gap: 1.25rem; padding-block: 1.4rem; }
  .hero-copy { padding: 0; }
  .product-name { margin-bottom: 1rem; gap: .75rem; }
  .product-name img { width: 57px; height: 57px; }
  .hero-media { padding-inline: clamp(1rem, 9vw, 3.25rem); }
  .features, .app-grid { grid-template-columns: minmax(0, 1fr); }
  .features { padding: 0; }
  .features > div { padding: .85rem .2rem; }
  .features > div + div { border-left: none; border-top: 1px solid var(--rule); }
  .gallery-grid { gap: .5rem; }
  .gallery figure a { padding: .32rem; }
  .gallery figcaption { font-size: .76rem; }
}