:root {
  color-scheme: light;
  --bg: #ffffff;
  --bg-panel: #f5f5f5;
  --bg-panel-hover: #ececec;
  --border: #e6e6e6;
  --ink: #1b1b1b;
  --muted: #666666;
  --accent: #ee6a2f;
  --accent-dark: #c9501a;
  --on-accent: #ffffff;
  --sky: #3f8fe8;
  --sky-deep: #2c77d0;
  --sky-tint: #e2eefc;
  --sky-ink: #1f5fae;
  --pine: #2f8a63;
  --honey: #f3b73c;
  --lav: #8f6fd8;
  --error: #c43d2f;
  --clear: transparent;
  --veil: rgba(27, 27, 27, .28);

  --font-display: "Inter", "Noto Sans SC", "PingFang SC", "Hiragino Sans", "Apple SD Gothic Neo", "Microsoft YaHei", system-ui, sans-serif;
  --font-body: "Inter", "Noto Sans SC", "PingFang SC", "Hiragino Sans", "Apple SD Gothic Neo", system-ui, -apple-system, sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, "SF Mono", Menlo, Consolas, monospace;
  --weight-normal: 400;
  --weight-heading: 500;
  --weight-strong: 600;
  --size-small: .8125rem;
  --size-body: 1rem;
  --size-lead: 1.1875rem;
  --size-h1: clamp(34px, 3.4vw, 48px);
  --size-h2: clamp(26px, 2.6vw, 38px);
  --size-h3: clamp(20px, 1.8vw, 24px);
  --tracking-title: -.02em;
  --leading-body: 1.8;

  --r-card: 28px;
  --r-scene: 40px;
  --r-panel: 32px;
  --r-pill: 999px;
  --r-mark: 10px;
  --r-code: 16px;
  --r-shot: 10px;
  --r-small: 6px;
  --r-indicator: 3px;
  --r-highlight: .07em;
  --r-bump: 0 0 58px 58px;

  --shadow-xs: 0 1px 2px rgba(27, 27, 27, .06);
  --shadow-card: 0 0 0 1px rgba(27, 27, 27, .035), 0 2px 6px rgba(27, 27, 27, .04), 0 18px 40px -14px rgba(27, 27, 27, .14);
  --shadow-accent: 0 8px 20px -8px rgba(238, 106, 47, .55);
  --ease: cubic-bezier(.2, .75, .2, 1);
  --time-fast: .2s;
  --time-reveal: .6s;
  --gutter: clamp(16px, 3vw, 32px);
  --width-content: 1120px;
  --width-reading: 760px;
  --width-header: 1280px;
  --header-height: 88px;
  --section-space: clamp(64px, 8vw, 120px);
  --z-header: 50;
  --z-fab: 30;
}

*,
*::before,
*::after { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 24px; }
html.nav-open { overflow: hidden; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: var(--size-body);
  line-height: var(--leading-body);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
main { min-width: 0; }
img, svg { max-width: 100%; }
img { display: block; height: auto; }
button, input, select, textarea { font: inherit; }
button, a { -webkit-tap-highlight-color: var(--clear); }
button { cursor: pointer; }
button, input, select, textarea { color: var(--ink); }
button { border: 0; }
a { color: inherit; text-decoration: none; }
a, button { touch-action: manipulation; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 4px; }
[hidden] { display: none !important; }
h1, h2, h3, h4 {
  margin: 0 0 .65em;
  font-family: var(--font-display);
  font-weight: var(--weight-heading);
  letter-spacing: var(--tracking-title);
  line-height: 1.22;
  text-wrap: balance;
}
h1 { font-size: var(--size-h1); line-height: 1.18; }
h2 { font-size: var(--size-h2); }
h3 { font-size: var(--size-h3); }
p { margin: 0 0 1.1em; }
strong, b { font-weight: var(--weight-strong); }
small, .small { font-size: var(--size-small); }
code, pre, kbd { font-family: var(--font-mono); }
code { overflow-wrap: anywhere; }
pre {
  max-width: 100%;
  min-width: 0;
  overflow-x: auto;
  padding: 24px;
  background: var(--bg-panel);
  color: var(--ink);
  border-radius: var(--r-code);
  font-size: .875rem;
  line-height: 1.8;
  tab-size: 2;
}
pre code { white-space: pre; overflow-wrap: normal; word-break: normal; }
hr { border: 0; border-top: 1px solid var(--border); margin-block: 32px; }
.wrap {
  width: 100%;
  max-width: calc(var(--width-content) + var(--gutter) * 2);
  margin-inline: auto;
  padding-inline: var(--gutter);
}
.reading { max-width: calc(var(--width-reading) + var(--gutter) * 2); }
.section { padding-top: var(--section-space); padding-bottom: var(--section-space); }
.prose { min-width: 0; }
.prose h2 { margin-top: 2.2em; }
.prose h3 { margin-top: 1.7em; }
.prose :is(p, li, dd) { overflow-wrap: break-word; }
.prose a:not(.btn):not(.store-button) { text-decoration: underline; text-underline-offset: .22em; }
.prose > :first-child { margin-top: 0; }
.prose li + li { margin-top: .5em; }
.prose blockquote { margin-inline: 0; }
.muted { color: var(--muted); }
.lead { font-size: var(--size-lead); line-height: 1.7; }
.keep { white-space: nowrap; }
.center { text-align: center; }
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  clip-path: inset(50%);
  overflow: hidden;
  white-space: nowrap;
}
.grid-two { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 24px; }
.grid-two > *, .stage > *, .footer-grid > *, .tab-detail > * { min-width: 0; }
.panel {
  padding: clamp(24px, 4vw, 48px);
  border-radius: var(--r-panel);
  background: var(--bg-panel);
  color: var(--ink);
}
.card {
  position: relative;
  min-width: 0;
  padding: 24px 28px;
  border-radius: var(--r-card);
  background: var(--bg);
  color: var(--ink);
  box-shadow: var(--shadow-card);
}
.card > :last-child, .panel > :last-child { margin-bottom: 0; }
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 9px;
  min-height: 50px;
  padding: 10px 26px;
  border-radius: var(--r-pill);
  font-size: 16px;
  font-weight: var(--weight-strong);
  line-height: 1.4;
  letter-spacing: -.005em;
  text-align: center;
  transition: background-color var(--time-fast) var(--ease), box-shadow var(--time-fast) var(--ease);
}
.btn svg { width: 17px; height: 17px; flex-shrink: 0; }
.btn-primary { background: var(--accent); color: var(--on-accent); box-shadow: var(--shadow-accent); }
.btn-primary:hover, .btn-primary.is-hover { background: var(--accent-dark); color: var(--on-accent); }
.btn-ghost { background: var(--bg-panel); color: var(--ink); }
.btn-ghost:hover, .btn-ghost.is-hover { background: var(--bg-panel-hover); color: var(--ink); }
.btn-sm { min-height: 42px; font-size: 15px; padding: 9px 22px; }
.btn-sm.btn-primary { box-shadow: none; }
.btn:disabled, .btn[aria-disabled="true"] { background: var(--bg-panel); color: var(--muted); box-shadow: none; cursor: not-allowed; }
.cta-row { display: flex; flex-wrap: wrap; justify-content: center; gap: 12px; margin-bottom: 22px; }
.arw { fill: none; stroke: currentColor; stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round; }

#site-header { position: relative; z-index: var(--z-header); }
.header-shell {
  position: relative;
  display: flex;
  align-items: center;
  gap: 28px;
  min-height: var(--header-height);
  width: 100%;
  max-width: min(100%, calc(var(--width-header) + var(--gutter) * 2));
  margin-inline: auto;
  padding-inline: var(--gutter);
  background: var(--bg);
  color: var(--ink);
}
.brand { display: inline-flex; align-items: center; gap: 12px; flex-shrink: 0; line-height: 1.3; }
.brand-mark { width: 38px; height: 38px; flex-shrink: 0; border-radius: var(--r-mark); border: 1px solid var(--border); background: var(--bg); box-shadow: var(--shadow-xs); }
.brand-name { font-size: 17px; font-weight: var(--weight-strong); letter-spacing: -.015em; }
.desktop-nav { min-width: 0; margin-inline: auto; }
.site-links {
  display: flex;
  align-items: center;
  gap: clamp(14px, 1.6vw, 26px);
  list-style: none;
  margin: 0;
  padding: 0;
}
.site-links a { display: block; padding-block: 14px; font-size: 14.5px; white-space: nowrap; color: var(--muted); }
.site-links a:hover, .site-links a[aria-current="page"] { color: var(--ink); }
.site-links a[aria-current="page"] { font-weight: var(--weight-strong); }
.header-tools { display: flex; align-items: center; gap: 8px; flex-shrink: 0; }
.language-picker { position: relative; }
.language-toggle, .menu-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-width: 44px;
  min-height: 44px;
  padding: 9px 12px;
  border-radius: var(--r-pill);
  background: var(--bg);
  color: var(--ink);
  font-size: 14px;
  white-space: nowrap;
}
.language-toggle:hover, .menu-toggle:hover { background: var(--bg-panel); color: var(--ink); }
.language-toggle svg, .menu-toggle svg { width: 20px; height: 20px; flex-shrink: 0; fill: none; stroke: currentColor; stroke-width: 1.6; stroke-linecap: round; stroke-linejoin: round; }
.language-short { display: none; }
.language-menu {
  position: absolute;
  top: calc(100% + 8px);
  right: 0;
  z-index: 5;
  width: 190px;
  padding: 8px;
  border-radius: var(--r-code);
  background: var(--bg);
  color: var(--ink);
  box-shadow: var(--shadow-card);
  list-style: none;
  margin: 0;
}
.language-menu a { display: block; min-height: 44px; padding: 9px 12px; border-radius: var(--r-small); }
.language-menu a:hover { background: var(--bg-panel); color: var(--ink); }
.language-menu [aria-current="true"] { font-weight: var(--weight-strong); }
.menu-toggle { display: none; }
.mobile-drawer, .menu-veil { display: none; }

.site-footer { border-top: 1px solid var(--border); padding-top: 64px; padding-bottom: 32px; background: var(--bg); color: var(--ink); }
.footer-grid { display: grid; grid-template-columns: 1.35fr .75fr 1.2fr .7fr; gap: 40px; }
.footer-brand p { max-width: 340px; margin-top: 20px; color: var(--muted); font-size: 14px; }
.footer-title { margin-bottom: 16px; font-size: 15px; font-weight: var(--weight-strong); }
.footer-links { display: grid; gap: 8px; list-style: none; margin: 0; padding: 0; }
.footer-links a { display: inline-block; padding-block: 3px; color: var(--muted); font-size: 14px; }
.footer-links a:hover { color: var(--ink); text-decoration: underline; text-underline-offset: .2em; }
.footer-bottom { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 12px 24px; margin-top: 48px; padding-top: 24px; border-top: 1px solid var(--border); font-size: 12px; color: var(--muted); }
.footer-bottom p { margin: 0; }
.footer-bottom a { text-decoration: underline; text-underline-offset: .2em; }

.reveal { opacity: 1; transform: none; }
html.reveal-ready .reveal:not(.shown) { opacity: 0; transform: translateY(20px); }
html.reveal-ready .reveal { transition: opacity var(--time-reveal) var(--ease), transform var(--time-reveal) var(--ease); }

.hero { text-align: center; padding: 14px 24px 42px; overflow-x: clip; }
.eyebrow { display: inline-flex; align-items: center; gap: 9px; margin: 0 0 18px; padding: 6px 14px 6px 12px; border-radius: var(--r-pill); background: var(--bg-panel); color: var(--ink); font-size: 13px; font-weight: var(--weight-heading); line-height: 1.8; }
.pulse { position: relative; width: 8px; height: 8px; flex-shrink: 0; border-radius: var(--r-pill); background: var(--pine); }
.hero-title { margin: 0 0 22px; font-size: clamp(34px, 3.4vw, 48px); font-weight: var(--weight-heading); line-height: 1.18; letter-spacing: var(--tracking-title); }
.line { display: block; }
.w { display: inline-block; animation: rise .6s var(--ease) both; }
.d0 { animation-delay: 0s; }
.d1 { animation-delay: .08s; }
.d2 { animation-delay: .16s; }
.d3 { animation-delay: .24s; }
.d4 { animation-delay: .32s; }
.d5 { animation-delay: .4s; }
.d6 { animation-delay: .48s; }
@keyframes rise { from { opacity: 0; transform: translateY(.45em); } to { opacity: 1; transform: translateY(0); } }
.stamp { margin-left: .16em; vertical-align: -.14em; }
.stamp svg { display: block; width: 1em; height: 1em; transform: rotate(-9deg); }
.mark { position: relative; isolation: isolate; }
.mark::after { content: ""; position: absolute; left: -.04em; right: -.04em; bottom: .08em; height: .24em; border-radius: var(--r-highlight); background: var(--accent); z-index: -1; transform-origin: left center; animation: sweep .5s var(--ease) .6s both; }
@keyframes sweep { from { transform: scaleX(0); } to { transform: scaleX(1); } }
.devices { display: flex; flex-wrap: wrap; justify-content: center; align-items: center; gap: 22px; margin: 0 0 12px; padding: 0; list-style: none; font-size: 13.5px; color: var(--muted); }
.devices li, .devices a { display: inline-flex; align-items: center; gap: 7px; }
.devices a { min-height: 30px; }
.devices a:hover { color: var(--ink); }
.dev { width: 19px; height: 19px; flex-shrink: 0; fill: none; stroke: var(--ink); stroke-width: 1.6; stroke-linecap: round; stroke-linejoin: round; }
.devices .sep { width: 1px; height: 14px; flex-shrink: 0; background: var(--border); }
.store-pill { padding: 4px 11px 4px 9px; border: 1px solid var(--border); border-radius: var(--r-pill); font-size: 12.5px; font-weight: var(--weight-heading); color: var(--ink); }
.fact { max-width: 640px; margin: 0 auto 14px; font-size: 15px; line-height: 1.6; color: var(--muted); }
.fact strong { color: var(--ink); }
.chips { display: flex; flex-wrap: wrap; justify-content: center; gap: 8px; margin: 0 0 26px; padding: 0; list-style: none; }
.chips li { display: inline-flex; align-items: center; gap: 7px; min-height: 30px; padding: 4px 13px 4px 10px; border-radius: var(--r-pill); background: var(--bg-panel); color: var(--ink); font-size: 13px; font-weight: var(--weight-heading); line-height: 1.6; }
.chip-ico { width: 15px; height: 15px; flex-shrink: 0; }
.ink { fill: none; stroke: var(--ink); stroke-width: 2.2; stroke-linecap: round; stroke-linejoin: round; vector-effect: non-scaling-stroke; }
.ink-s { fill: none; stroke: var(--ink); stroke-width: 1.5; stroke-linecap: round; stroke-linejoin: round; vector-effect: non-scaling-stroke; }
.ink-w { fill: var(--bg); stroke: var(--ink); stroke-width: 2.2; stroke-linejoin: round; vector-effect: non-scaling-stroke; }
.f-honey { fill: var(--honey); }
.f-honey-glass { fill: var(--honey); fill-opacity: .42; }
.f-sky { fill: var(--sky); }
.f-pine { fill: var(--pine); }
.f-lav { fill: var(--lav); }
.f-accent { fill: var(--accent); }
.f-ink { fill: var(--ink); }
.f-panel { fill: var(--bg-panel); }
.f-tint { fill: var(--sky-tint); }
.badge-ring { fill: var(--accent); stroke: var(--bg); stroke-width: 2.6; }
.badge-arw { fill: none; stroke: var(--on-accent); stroke-width: 2.2; stroke-linecap: round; stroke-linejoin: round; vector-effect: non-scaling-stroke; }
.stage { display: grid; grid-template-columns: repeat(2, minmax(0, 430px)); justify-content: center; gap: 22px; }
.stage .card { display: flex; flex-direction: column; align-items: center; }
.card-art { width: 100%; height: 88px; display: flex; align-items: center; justify-content: center; }
.card-text { flex: 1; max-width: 350px; margin: 12px 0 16px; font-size: 14.5px; line-height: 1.55; }
.stage .card .btn { width: 100%; max-width: 310px; }
.verify-art { position: relative; display: inline-block; transform: translateX(-14px); }
.id-pill { display: inline-block; padding: 11px 24px; border-radius: var(--r-pill); background: var(--bg-panel); color: var(--ink); font-family: var(--font-mono); font-size: 18px; font-weight: var(--weight-heading); letter-spacing: .01em; }
.id-pill span { color: var(--muted); }
.loupe { position: absolute; right: -20px; top: -12px; width: 92px; height: 82px; transform: rotate(-7deg); }
.devices-art { width: 180px; height: 96px; }
.tag { position: absolute; top: 14px; left: 14px; padding: 5px 11px; border-radius: var(--r-pill); background: var(--sky-tint); color: var(--sky-ink); font-size: 12px; font-weight: var(--weight-strong); letter-spacing: .02em; line-height: 1.8; }
.footnote { margin: 18px 0 0; font-size: 13px; color: var(--muted); }
.scene { position: relative; height: 360px; margin-inline: 24px; background: var(--sky); color: var(--ink); border-radius: var(--r-scene); overflow: hidden; }
.scene-art { position: absolute; inset: 0; width: 100%; height: 100%; max-width: none; }
.s-tint { fill: var(--bg); fill-opacity: .17; }
.s-tint2 { fill: var(--bg); fill-opacity: .1; }
.s-deep { fill: var(--sky-deep); }
.s-pine { fill: var(--pine); }
.s-pine2 { fill: var(--pine); fill-opacity: .78; }
.s-honey { fill: var(--honey); }
.s-rib { fill: none; stroke: var(--bg); stroke-opacity: .32; stroke-width: 2; stroke-linecap: round; }
.s-wave { fill: none; stroke: var(--bg); stroke-opacity: .35; stroke-width: 2.2; stroke-linecap: round; }
.scene-bump { position: absolute; top: 0; left: 50%; width: 116px; height: 58px; margin-left: -58px; display: flex; justify-content: center; padding-top: 12px; background: var(--bg); color: var(--ink); border-radius: var(--r-bump); z-index: 2; }
.scene-bump svg { width: 22px; height: 28px; fill: none; stroke: var(--ink); stroke-width: 1.5; stroke-linecap: round; stroke-linejoin: round; }

@media (max-width: 1279px) {
  :root { --header-height: 76px; }
  .header-shell { gap: 16px; }
  .desktop-nav { display: none; }
  .header-tools { margin-left: auto; }
  .menu-toggle { display: inline-flex; }
  .menu-veil:not([hidden]) { display: block; position: fixed; inset: var(--header-height) 0 0; z-index: 1; background: var(--veil); }
  .mobile-drawer:not([hidden]) {
    display: block;
    position: absolute;
    top: 100%;
    inset-inline: 0;
    z-index: 3;
    max-height: calc(100dvh - var(--header-height));
    overflow-y: auto;
    overscroll-behavior: contain;
    padding: 16px var(--gutter) 24px;
    background: var(--bg);
    color: var(--ink);
    border-bottom: 1px solid var(--border);
  }
  .mobile-drawer ul { display: block; list-style: none; padding: 0; margin: 0; }
  .mobile-drawer a { display: flex; align-items: center; width: 100%; min-height: 48px; padding: 12px 16px; border-radius: var(--r-small); font-size: 16px; }
  .mobile-drawer a:hover { background: var(--bg-panel); color: var(--ink); }
  .mobile-drawer [aria-current] { font-weight: var(--weight-strong); }
  .drawer-languages { margin-top: 16px; padding-top: 16px; border-top: 1px solid var(--border); }
}
@media (max-width: 900px) {
  .footer-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 768px) {
  :root { --size-h1: clamp(24px, 4.8vw, 30px); }
  .hero-title { font-size: clamp(24px, 4.8vw, 30px); }
  .hero { padding: 10px 18px 36px; }
  .devices { gap: 12px 18px; }
  .stage { grid-template-columns: minmax(0, 1fr); max-width: 520px; margin-inline: auto; }
  .scene { margin-inline: 12px; border-radius: var(--r-panel); }
  .grid-two { grid-template-columns: minmax(0, 1fr); }
}
@media (max-width: 640px) {
  .wrap { padding-inline: var(--gutter); }
  .tilt, .tilt-art { transform: none; }
  .language-long { display: none; }
  .language-short { display: inline; }
  .header-shell { gap: 8px; }
  .brand { gap: 8px; }
  .brand-name { font-size: 14px; }
  .brand-mark { width: 32px; height: 32px; }
  .header-tools { margin-left: auto; gap: 0; }
  .language-toggle { padding-inline: 8px; gap: 5px; }
  .language-toggle svg { width: 17px; height: 17px; }
  .card { padding: 24px; }
  .footer-grid { gap: 32px 20px; }
  .footer-brand { grid-column: 1 / -1; }
  .footer-bottom { display: block; }
  .footer-bottom > * + * { margin-top: 12px; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation: none !important; transition: none !important; }
  html.reveal-ready .reveal:not(.shown) { opacity: 1; transform: none; }
}