:root {
  color-scheme: dark;
  /* Primitive colors, followed by semantic and component surfaces. */
  --swipe-blue: #1080dd;
  --swipe-black: #000;
  --swipe-white: #fff;
  --swipe-gray-950: #0f0f0f;
  --swipe-gray-900: #1c1c1c;
  --swipe-gray-800: #282828;
  --bg: var(--swipe-black);
  --panel: var(--swipe-gray-950);
  --ink: var(--swipe-white);
  --muted: #aaa;
  --accent: var(--swipe-blue);
  /* Text/controls use contrast-adjusted blue; large accents keep the original blue. */
  --link: #65b7fa;
  --link-hover: #a3d5ff;
  --action: #0d6dbd;
  --action-hover: #0e75ca;
  --action-pressed: #0a5798;
  --line: #333;
  --surface-border: linear-gradient(#ffffff45, #ffffff12);
  --surface-dark: linear-gradient(var(--swipe-gray-800), var(--swipe-gray-900) 25%, var(--swipe-gray-950));
  --surface-blue: linear-gradient(#ffffff14, transparent 60%), var(--action);
  font-family: "HarmonyOS Sans", "PingFang SC", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-synthesis: none;
}
* { box-sizing: border-box; }
html { scroll-padding-top: 2rem; }
body { margin: 0; background: var(--bg); color: var(--ink); font-size: 1rem; line-height: 1.65; }
a { color: var(--link); text-underline-offset: .24em; }
a:hover { color: var(--link-hover); }
a:focus-visible, summary:focus-visible { outline: 3px solid var(--link); outline-offset: 5px; }
::selection { background: var(--action); color: var(--ink); }
img { display: block; max-width: 100%; height: auto; }
figure, h1, h2, h3, p { margin: 0; }
h1, h2, h3 { line-height: 1.15; text-wrap: balance; }
p { text-wrap: pretty; }
.wrap { width: min(1160px, calc(100% - 64px)); margin-inline: auto; }
/* Paint only the surfaces through the cobble path. Content and focus stay unclipped. */
.cobble { position: relative; isolation: isolate; }
.cobble::before, .cobble::after { content: ""; position: absolute; inset: 0; z-index: -1; pointer-events: none; border-radius: inherit; }
.cobble::before { background: var(--cobble-border, var(--surface-border)); clip-path: var(--cobble-path, none); }
.cobble::after { inset: 1px; background: var(--cobble-surface, var(--surface-dark)); }
.cobble-ready::before, .cobble-ready::after { border-radius: 0; }
.cobble-ready::after { inset: 0; clip-path: var(--cobble-inset-path); }
.skip { position: absolute; top: -100px; left: 1rem; z-index: 5; padding: .75rem 1rem; background: var(--ink); color: var(--bg); }
.skip:focus { top: 1rem; }
.site-header { display: flex; justify-content: space-between; align-items: center; gap: 1.5rem; padding-block: 28px; border-bottom: 1px solid var(--line); }
.brand { display: inline-flex; align-items: center; gap: 12px; font-size: 1.1rem; font-weight: 650; color: var(--ink); text-decoration: none; white-space: nowrap; }
.brand-mark { --cobble-surface: var(--surface-blue); display: grid; place-items: center; flex: 0 0 44px; width: 44px; height: 44px; color: var(--ink); border-radius: 14px; font-size: 1.45rem; font-weight: 500; }
nav { display: flex; gap: 1.5rem; align-items: center; flex-wrap: wrap; }
nav a { display: inline-flex; align-items: center; min-height: 44px; color: var(--muted); text-decoration: none; padding-block: 8px; font-size: .88rem; }
nav a[aria-current="page"] { color: var(--ink); text-decoration: underline; text-decoration-color: var(--accent); text-underline-offset: .6em; }
.language { color: var(--link); }
.hero { display: grid; grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr); align-items: center; gap: 64px; padding-block: 80px 88px; }
.eyebrow { color: var(--link); font-size: .73rem; font-weight: 650; letter-spacing: .15em; line-height: 1.6; margin-bottom: 24px; }
.hero h1 { font-size: clamp(3.6rem, 7.2vw, 6.2rem); letter-spacing: -.065em; line-height: 1.02; }
.hero h1 span { color: var(--accent); }
[lang="zh-CN"] .hero h1 { font-size: clamp(2.7rem, 5.1vw, 4.5rem); letter-spacing: -.025em; line-height: 1.2; }
.intro { font-size: clamp(1.25rem, 2.2vw, 1.65rem); line-height: 1.45; margin-top: 32px; max-width: 31rem; }
.hero-detail { max-width: 32rem; color: var(--muted); margin-top: 20px; }
.actions { display: flex; flex-wrap: wrap; align-items: center; gap: 12px; margin-top: 30px; }
.button { display: inline-flex; justify-content: center; align-items: center; gap: 10px; min-height: 52px; max-width: 100%; padding: 13px 24px; font-size: .88rem; font-weight: 650; line-height: 1.5; text-decoration: none; text-align: center; border-radius: 20px; }
.primary { --cobble-surface: var(--surface-blue); color: var(--ink); }
.primary:hover { --cobble-surface: var(--action-hover); color: var(--ink); }
.secondary { color: var(--ink); }
.secondary:hover { --cobble-border: var(--accent); --cobble-surface: var(--swipe-gray-800); color: var(--ink); }
.button:active { --cobble-surface: linear-gradient(#0004, transparent 75%), var(--action-pressed); --cobble-border: var(--action-pressed); color: var(--ink); }
.requirements { color: var(--muted); font-size: .78rem; line-height: 1.8; margin-top: 21px; }
.hero-device { position: relative; isolation: isolate; display: flex; align-items: center; flex-direction: column; }
.swipe-tile { --cobble-surface: linear-gradient(#ffffff18, transparent 65%), var(--accent); position: absolute; z-index: -1; top: 50%; left: 50%; width: min(100%, 410px); aspect-ratio: 1; transform: translate(-50%, -56%); border-radius: 27%; }
.phone { width: min(100%, 292px); padding: 34px 13px 43px; background: #060606; border: 2px solid #363636; border-radius: 37px; box-shadow: 0 24px 50px #0009, inset 0 0 0 2px #111; position: relative; }
.phone img { border-radius: 4px; width: 100%; }
.speaker { position: absolute; width: 46px; height: 3px; background: var(--swipe-gray-800); top: 16px; left: calc(50% - 23px); border-radius: 3px; }
.hero-device figcaption { font-size: .72rem; color: var(--muted); margin-top: 24px; text-align: center; }
.section { padding-block: 80px; }
.section-heading { max-width: 720px; margin-bottom: 40px; }
.section h2 { font-size: clamp(2rem, 3.8vw, 3rem); letter-spacing: -.035em; }
.section-heading p:last-child:not(.eyebrow) { color: var(--muted); margin-top: 20px; }
.capture-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 28px; }
.capture { --cobble-surface: linear-gradient(var(--swipe-gray-900), var(--panel)); display: flex; align-items: center; gap: 30px; padding: 32px; border-radius: 24px; }
.capture img { width: 45%; border-radius: 6px; }
.capture h3 { font-size: 1.25rem; }
.capture p { color: var(--muted); font-size: .9rem; margin-top: 12px; }
.caption-note { font-size: .75rem; color: var(--muted); margin-top: 20px; }
.getting-started { background: var(--panel); border-block: 1px solid var(--line); }
.steps { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); list-style: none; padding: 0; margin: 0; gap: 44px; }
.step-number { --cobble-surface: var(--surface-blue); display: grid; place-items: center; width: 56px; height: 56px; margin-bottom: 24px; border-radius: 18px; color: var(--ink); font-size: 1.1rem; font-weight: 650; font-variant-numeric: tabular-nums; }
.steps h3 { font-size: 1.25rem; }
.steps p { color: var(--muted); margin-block: 16px 20px; font-size: .95rem; }
.steps a { font-size: .9rem; }
.faq { max-width: 900px; }
details { border-top: 1px solid var(--line); }
details:last-child { border-bottom: 1px solid var(--line); }
summary { cursor: pointer; padding: 23px 4px; font-weight: 600; }
details p { color: var(--muted); max-width: 48rem; padding: 0 4px 24px; }
.contribute { border-top: 1px solid var(--line); }
.contribute > p:not(.eyebrow) { max-width: 42rem; color: var(--muted); margin-top: 24px; }
.site-footer { display: flex; justify-content: space-between; gap: 40px; border-top: 1px solid var(--line); padding-block: 36px 50px; }
.footer-brand { color: var(--ink); font-weight: 650; text-decoration: none; }
.site-footer p { max-width: 35rem; color: var(--muted); font-size: .75rem; margin-top: 12px; }
.site-footer nav { align-content: flex-start; justify-content: flex-end; }
.watch-main { padding-block: 64px 80px; }
.watch-main h1 { font-size: clamp(2.5rem, 5vw, 4rem); letter-spacing: -.04em; }
.watch-intro { max-width: 54rem; color: var(--muted); margin-block: 24px 36px; }
.video-player { width: 100%; aspect-ratio: 16/9; background: #000; border: 1px solid var(--line); border-radius: 12px; overflow: hidden; }
.video-player iframe { display: block; width: 100%; height: 100%; border: 0; }
.video-caption { color: var(--muted); font-size: .78rem; margin-top: 15px; }
.transcript { max-width: 900px; }
.transcript > p:not(.eyebrow) { margin-top: 20px; color: var(--muted); }
.transcript ol { list-style: none; margin: 28px 0 0; padding: 0; }
.transcript li { display: grid; grid-template-columns: 64px 1fr; gap: 24px; padding-block: 24px; border-top: 1px solid var(--line); }
.timecode { align-self: start; display: inline-flex; align-items: center; min-height: 44px; font-variant-numeric: tabular-nums; font-size: .9rem; }
.transcript h3 { font-size: 1.15rem; }
.transcript li p { margin-top: 9px; color: var(--muted); }
.production { --cobble-surface: var(--panel); padding: 36px; border-radius: 24px; }
.production h2 { font-size: 1.4rem; }
.production p { margin-top: 20px; color: var(--muted); max-width: 64rem; font-size: .9rem; }
.production > a { display: inline-block; margin-top: 20px; font-size: .9rem; }
@media (max-width: 1000px) {
  .hero { gap: 32px; }
  .capture { flex-direction: column; text-align: center; }
  .capture img { width: 180px; max-width: 100%; }
  .steps { gap: 28px; }
  .site-footer { flex-direction: column; gap: 24px; }
  .site-footer nav { justify-content: flex-start; }
}
@media (max-width: 680px) {
  .wrap { width: calc(100% - 40px); }
  .site-header { flex-wrap: wrap; gap: 12px; padding-block: 20px; }
  .site-header nav { width: 100%; justify-content: space-between; gap: 12px; }
  .hero { grid-template-columns: 1fr; gap: 42px; padding-block: 52px 44px; }
  .hero-copy { max-width: 34rem; }
  .hero h1 { font-size: clamp(3.7rem, 14vw, 5rem); }
  .phone { width: 260px; }
  .swipe-tile { width: min(100%, 360px); }
  .eyebrow { font-size: .67rem; letter-spacing: .1em; margin-bottom: 20px; }
  .section { padding-block: 48px; }
  .capture-grid { gap: 14px; }
  .capture { padding: 18px 12px; gap: 24px; }
  .capture h3 { font-size: 1rem; }
  .capture p { font-size: .78rem; }
  .steps { grid-template-columns: 1fr; gap: 32px; }
  .step-number { margin-bottom: 18px; }
  .watch-main { padding-block: 44px; }
  [lang="zh-CN"] .watch-main h1 { font-size: clamp(1.5rem, 7.5vw, 2rem); line-height: 1.3; }
  .transcript li { gap: 12px; grid-template-columns: 54px 1fr; }
  .production { padding: 24px; }
}
@media (max-width: 380px) {
  .site-header nav { gap: 8px; }
  .site-header nav a { font-size: .8rem; }
  .actions { align-items: stretch; flex-direction: column; }
  .capture-grid { grid-template-columns: 1fr; }
  .capture { padding: 28px; }
}
@media (forced-colors: active) {
  .cobble::before, .cobble::after { display: none; }
  .button, .brand-mark, .step-number { border: 1px solid ButtonText; }
  .swipe-tile { display: none; }
}