:root {
  --c-bg: #FFFAFA;
  --c-panel: #F5F3F3;
  --c-panel-2: #ECE9E9;
  --c-border: #E6E1E1;
  --c-sep: #C4BDBE;
  --c-accent: #1C8BF2;
  --c-accent-light: #4FB0FF;
  --c-accent-dark: #0B66C8;
  --c-text: #121212;
  --c-muted: #5E595A;
  --c-success: #22B35E;
  --c-success-ring: rgba(34, 179, 94, 0.18);
  --c-warn: #E59A00;
  --c-error: #E5484D;
  --c-yellow: #FFCB05;
  --c-white: #FFFFFF;
  --c-focus: rgba(28, 139, 242, 0.45);
  --c-clear: transparent;
  --c-veil: rgba(18, 18, 18, 0.24);
  --tile-sky-a: rgba(28, 139, 242, 0.80);
  --tile-sky-b: rgba(36, 204, 228, 0.66);
  --tile-lime-a: rgba(190, 232, 44, 0.80);
  --tile-lime-b: rgba(46, 186, 82, 0.68);
  --tile-sun-a: rgba(255, 203, 5, 0.84);
  --tile-sun-b: rgba(255, 136, 0, 0.72);
  --tile-coral-a: rgba(255, 114, 98, 0.80);
  --tile-coral-b: rgba(255, 90, 168, 0.66);
  --glow-sky: rgba(28, 139, 242, 0.34);
  --glow-lime: rgba(120, 210, 40, 0.32);
  --glow-sun: rgba(255, 170, 0, 0.34);
  --glow-coral: rgba(255, 98, 140, 0.30);
  --hl-white: rgba(255, 255, 255, 0.78);
  --hl-edge: rgba(255, 255, 255, 0.48);
  --sheen: rgba(255, 255, 255, 0.34);
  --shade-in: rgba(18, 18, 18, 0.10);
  --frost: rgba(255, 255, 255, 0.74);
  --frost-edge: rgba(255, 255, 255, 0.92);
  --shadow-ink: rgba(18, 18, 18, 0.20);
  --shadow-ink-soft: rgba(18, 18, 18, 0.06);
  --shadow-soft: 0 1px 2px var(--shadow-ink-soft), 0 12px 30px -14px var(--shadow-ink);
  --shadow-accent: 0 1px 2px var(--shadow-ink-soft), 0 14px 30px -12px var(--glow-sky);
  --shadow-lift: 0 4px 8px var(--shadow-ink-soft), 0 24px 46px -20px var(--glow-sky);
  --r-card: 28px;
  --r-panel: 32px;
  --r-tile: 28%;
  --r-chip: 10px;
  --r-icon: 9px;
  --r-setting: 14px;
  --r-wordmark: 0.26em;
  --r-glow: 40%;
  --r-circle: 50%;
  --r-pill: 999px;
  --font-display: "Inter", "Noto Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, sans-serif;
  --font-body: "Inter", "Noto Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, "SFMono-Regular", Menlo, Consolas, monospace;
  --weight-body: 400;
  --weight-medium: 500;
  --weight-label: 600;
  --weight-bold: 700;
  --weight-heading: 800;
  --weight-display: 900;
  --text-xs: 12px;
  --text-chip: 12.5px;
  --text-sm: 13px;
  --text-label: 14px;
  --text-nav: 15px;
  --text-base: 16px;
  --text-lead: 17px;
  --text-brand: 18px;
  --text-subtitle: 20px;
  --text-h3: 24px;
  --text-h2: clamp(26px, 2.4vw, 36px);
  --text-h1: clamp(34px, 2.4vw + 14px, 48px);
  --text-hero-kw: clamp(19px, 1.1vw + 11px, 28px);
  --text-mobile-h1: 30px;
  --gutter: 40px;
  --reading-width: 1120px;
  --wide-width: 1280px;
  --nav-h: 72px;
  --peek: 64px;
  --ease: cubic-bezier(0.2, 0.7, 0.2, 1);
  --time-fast: 0.2s;
  --time-reveal: 0.65s;
}
*,
*::before,
*::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; scroll-padding-top: 28px; }
html.nav-open { overflow: hidden; }
body {
  margin: 0;
  background: var(--c-bg);
  color: var(--c-text);
  font-family: var(--font-body);
  font-size: var(--text-base);
  font-weight: var(--weight-body);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}
[hidden] { display: none !important; }
img { display: block; max-width: 100%; height: auto; }
svg { vertical-align: middle; flex-shrink: 0; }
button, input, select, textarea { font: inherit; }
button { cursor: pointer; }
button, a { -webkit-tap-highlight-color: var(--c-clear); }
a { color: var(--c-accent-dark); text-underline-offset: 0.2em; }
a:hover { text-decoration-thickness: 2px; }
:focus-visible { outline: 3px solid var(--c-focus); outline-offset: 3px; border-radius: var(--r-chip); }
::selection { background: var(--c-accent-dark); color: var(--c-white); }
h1, h2, h3, h4 { font-family: var(--font-display); color: var(--c-text); text-wrap: balance; }
h1 { font-size: var(--text-h1); font-weight: var(--weight-display); line-height: 1.15; letter-spacing: -0.02em; }
h2 { font-size: var(--text-h2); font-weight: var(--weight-display); line-height: 1.25; letter-spacing: -0.02em; }
h3 { font-size: var(--text-h3); font-weight: var(--weight-heading); line-height: 1.35; }
p { margin: 0 0 1.25em; }
code, pre, kbd { font-family: var(--font-mono); }
code { overflow-wrap: anywhere; font-size: 0.9em; }
pre { max-width: 100%; min-width: 0; overflow-x: auto; padding: 24px; border-radius: var(--r-card); background: var(--c-panel); color: var(--c-text); }
pre code { overflow-wrap: normal; word-break: normal; white-space: pre; }
hr { border: 0; border-top: 1px solid var(--c-border); margin-block: 32px; }
:where(.grid, .split, .footer__grid, .detail-panel) > * { min-width: 0; }
.wrap, .shell, .header-shell {
  width: 100%;
  margin-inline: auto;
  padding-inline: var(--gutter);
}
.wrap { max-width: calc(var(--reading-width) + var(--gutter) * 2); }
.shell { max-width: calc(var(--wide-width) + var(--gutter) * 2); }
.header-shell { max-width: min(100%, calc(1280px + var(--gutter) * 2)); }
.section { padding-top: 96px; padding-bottom: 96px; }
.section--panel { background: var(--c-panel); color: var(--c-text); }
.section--yellow { background: var(--c-yellow); color: var(--c-text); }
.section__intro { max-width: 680px; margin-inline: auto; margin-bottom: 48px; text-align: center; }
.section__intro h2 { margin: 0 0 16px; }
.section__intro p { color: var(--c-muted); }
.section--yellow .section__intro p { color: var(--c-text); }
.grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 24px; }
.grid--two { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid--four { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.split { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); align-items: center; gap: 48px; }
.stack > * + * { margin-top: 24px; }
.nowrap { white-space: nowrap; }
.muted { color: var(--c-muted); }
.mono { font-family: var(--font-mono); }
.eyebrow { font-size: var(--text-sm); font-weight: var(--weight-bold); color: var(--c-accent-dark); }
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip-path: inset(50%); white-space: nowrap; border: 0; }
.skip { position: absolute; left: 16px; top: 12px; z-index: 60; width: 1px; height: 1px; overflow: hidden; clip-path: inset(50%); white-space: nowrap; padding: 0; border-radius: var(--r-pill); background: var(--c-text); color: var(--c-white); font-size: var(--text-label); font-weight: var(--weight-label); text-decoration: none; }
.skip:focus { width: auto; height: auto; overflow: visible; clip-path: none; padding: 10px 16px; }
.masthead { position: relative; z-index: 40; height: var(--nav-h); background: var(--c-bg); color: var(--c-text); }
.masthead__inner { position: relative; height: 100%; display: flex; align-items: center; gap: 32px; }
.brand { display: inline-flex; align-items: center; gap: 10px; color: var(--c-text); text-decoration: none; font-family: var(--font-display); font-size: var(--text-brand); font-weight: var(--weight-heading); letter-spacing: -0.015em; white-space: nowrap; flex-shrink: 0; }
.brand__logo { width: 34px; height: 34px; flex-shrink: 0; filter: drop-shadow(0 6px 10px var(--glow-sky)); }
.topnav { margin-left: auto; min-width: 0; }
.topnav__list { display: flex; align-items: center; gap: 0; list-style: none; margin: 0; padding: 0; }
.topnav__item { display: flex; align-items: center; }
.topnav__item + .topnav__item::before { content: "·"; padding: 0 10px; color: var(--c-sep); font-weight: var(--weight-bold); flex-shrink: 0; }
.topnav__link { display: block; padding: 6px 2px; color: var(--c-muted); font-size: var(--text-nav); font-weight: var(--weight-label); text-decoration: none; white-space: nowrap; transition: color var(--time-fast) ease; }
.topnav__link:hover { color: var(--c-accent-dark); }
.topnav__link[aria-current="page"] { color: var(--c-text); font-weight: var(--weight-heading); }
.header-tools { display: flex; align-items: center; gap: 8px; flex-shrink: 0; }
.lang-wrap { position: relative; }
.lang { display: inline-flex; align-items: center; gap: 7px; height: 38px; padding: 0 14px 0 12px; border: 0; border-radius: var(--r-pill); background: var(--c-panel); color: var(--c-text); font-family: var(--font-body); font-size: var(--text-label); font-weight: var(--weight-label); white-space: nowrap; transition: background-color var(--time-fast) ease; }
.lang:hover { background: var(--c-panel-2); color: var(--c-text); }
.lang svg { width: 16px; height: 16px; color: var(--c-muted); }
.lang__caret { color: var(--c-muted); font-size: var(--text-xs); }
.lang-menu { position: absolute; right: 0; top: calc(100% + 10px); width: 190px; padding: 8px; margin: 0; list-style: none; border-radius: var(--r-setting); background: var(--c-white); color: var(--c-text); box-shadow: var(--shadow-soft); }
.lang-menu a { display: block; min-height: 44px; padding: 10px 14px; border-radius: var(--r-chip); color: var(--c-text); text-decoration: none; }
.lang-menu a:hover, .lang-menu a[aria-current="true"] { background: var(--c-panel); color: var(--c-accent-dark); }
.menu-toggle { display: none; align-items: center; justify-content: center; min-width: 44px; min-height: 44px; border: 0; border-radius: var(--r-pill); background: var(--c-panel); color: var(--c-text); }
.menu-toggle svg { width: 22px; height: 22px; }
.mobile-nav { position: absolute; top: 100%; left: 0; right: 0; padding: 16px var(--gutter) 24px; max-height: calc(100dvh - var(--nav-h)); overflow-y: auto; overscroll-behavior: contain; background: var(--c-bg); color: var(--c-text); box-shadow: var(--shadow-soft); }
.mobile-nav ul { list-style: none; margin: 0; padding: 0; }
.mobile-nav a { display: flex; width: 100%; align-items: center; min-height: 48px; padding: 12px 16px; border-radius: var(--r-setting); color: var(--c-text); text-decoration: none; }
.mobile-nav a:hover, .mobile-nav a[aria-current] { background: var(--c-panel); color: var(--c-accent-dark); }
.mobile-nav__label { margin: 20px 16px 8px; color: var(--c-muted); font-size: var(--text-sm); }
.nav-veil { position: fixed; inset: var(--nav-h) 0 0; z-index: 30; border: 0; background: var(--c-veil); color: var(--c-text); }
.btn { display: inline-flex; justify-content: center; align-items: center; gap: 10px; min-height: 56px; padding: 12px 28px; border: 0; border-radius: var(--r-pill); font-family: var(--font-body); font-size: var(--text-lead); font-weight: var(--weight-bold); letter-spacing: -0.005em; text-decoration: none; white-space: normal; text-align: center; transition: transform var(--time-fast) ease, background-color var(--time-fast) ease, color var(--time-fast) ease, box-shadow var(--time-fast) ease; }
.btn svg { width: 18px; height: 18px; flex-shrink: 0; }
.btn--primary { background: var(--c-accent); color: var(--c-white); box-shadow: var(--shadow-accent); }
.btn--primary:hover, .btn--primary.is-hover { background: var(--c-accent-dark); color: var(--c-white); transform: translateY(-1px); }
.btn--soft { background: var(--c-panel); color: var(--c-accent-dark); }
.hero .btn--soft { color: var(--c-accent); }
.btn--soft:hover, .btn--soft.is-hover { background: var(--c-panel-2); color: var(--c-accent-dark); }
.btn:active, .btn.is-active { transform: translateY(1px); box-shadow: none; }
.btn:disabled, .btn[aria-disabled="true"] { background: var(--c-panel-2); color: var(--c-muted); box-shadow: none; cursor: not-allowed; transform: none; }
.btn--small { min-height: 44px; padding: 10px 20px; font-size: var(--text-label); }
.btn.is-focus { outline: 3px solid var(--c-focus); outline-offset: 3px; }
.card, .panel { min-width: 0; padding: 32px; border-radius: var(--r-card); background: var(--c-white); color: var(--c-text); box-shadow: var(--shadow-soft); }
.panel { border-radius: var(--r-panel); padding: 40px; }
.card h3 { margin: 0 0 12px; }
.card p:last-child, .panel p:last-child { margin-bottom: 0; }
.card__link { color: var(--c-accent-dark); font-weight: var(--weight-bold); }
.prose, .article-body { min-width: 0; }
.prose { max-width: 780px; margin-inline: auto; line-height: 1.85; }
.prose h2, .article-body h2 { margin-top: 2.4em; margin-bottom: 0.8em; }
.prose h3 { margin-top: 1.8em; }
.prose li + li { margin-top: 8px; }
.prose :where(img, video, iframe), .article-body :where(img, video, iframe) { max-width: 100%; }
.prose :where(div, section), .article-body :where(div, section) { min-width: 0; }
.decorated, .hero { overflow-x: clip; }
.hero { position: relative; height: clamp(660px, calc(100vh - var(--nav-h) - var(--peek)), 860px); overflow: hidden; }
.hero__shell { position: relative; z-index: 3; height: 100%; display: flex; align-items: center; }
.hero__copy { max-width: 580px; padding-bottom: 28px; }
.badge { display: inline-flex; align-items: center; gap: 10px; min-height: 34px; padding: 6px 16px 6px 13px; border-radius: var(--r-pill); background: var(--c-white); color: var(--c-text); box-shadow: var(--shadow-soft); font-size: var(--text-sm); font-weight: var(--weight-label); letter-spacing: 0.01em; max-width: 100%; overflow: hidden; overflow-wrap: anywhere; }
.badge__dot { width: 8px; height: 8px; flex-shrink: 0; border-radius: var(--r-circle); background: var(--c-success); box-shadow: 0 0 0 4px var(--c-success-ring); }
.badge__sep { color: var(--c-sep); }
.hero__title { margin: 28px 0 0; font-family: var(--font-display); }
.wordmark { display: block; font-size: var(--text-h1); font-weight: var(--weight-display); line-height: 1.1; letter-spacing: -0.02em; color: var(--c-text); }
.wordmark__chip { display: inline-block; min-width: 0.86em; margin: 0 0.07em 0 0.05em; padding: 0.02em 0.14em 0.05em; border-radius: var(--r-wordmark); background: linear-gradient(160deg, var(--c-accent-light), var(--c-accent) 45%, var(--c-accent-dark)); color: var(--c-white); letter-spacing: 0; text-align: center; transform: rotate(-6deg) translateY(-0.03em); box-shadow: inset 0 1px 0 var(--hl-white), inset 0 0 0 1px var(--hl-edge), 0 10px 20px -8px var(--glow-sky); }
.hero__kw { display: block; margin-top: 14px; font-size: var(--text-hero-kw); font-weight: var(--weight-heading); line-height: 1.28; letter-spacing: -0.02em; color: var(--c-text); }
.hero__actions { display: flex; flex-wrap: wrap; gap: 14px; margin-top: 34px; }
.hero__meta { display: grid; gap: 16px; margin-top: 34px; }
.hero__lead { margin: 0 0 4px; color: var(--c-muted); font-size: var(--text-lead); line-height: 1.65; }
.hero__lead strong { color: var(--c-text); font-weight: var(--weight-bold); }
.row { display: flex; align-items: center; flex-wrap: wrap; gap: 8px; margin: 0; padding: 0; list-style: none; }
.row__label { width: 44px; flex-shrink: 0; color: var(--c-muted); font-size: var(--text-xs); font-weight: var(--weight-bold); letter-spacing: 0.12em; }
.chip { display: inline-flex; align-items: center; min-height: 30px; padding: 4px 12px; border-radius: var(--r-pill); background: var(--c-panel); color: var(--c-text); font-family: var(--font-mono); font-size: var(--text-chip); font-weight: var(--weight-medium); max-width: 100%; overflow: hidden; overflow-wrap: anywhere; }
.plat { display: inline-flex; align-items: center; gap: 8px; height: 38px; padding: 0 14px 0 5px; border-radius: var(--r-pill); background: var(--c-white); color: var(--c-text); box-shadow: var(--shadow-soft); font-size: var(--text-label); font-weight: var(--weight-label); text-decoration: none; transition: transform var(--time-fast) ease, color var(--time-fast) ease; }
.plat__icon { width: 28px; height: 28px; display: grid; place-items: center; flex-shrink: 0; border-radius: var(--r-icon); background: var(--c-panel); color: var(--c-text); transition: background-color var(--time-fast) ease, color var(--time-fast) ease; }
.plat__icon svg { width: 15px; height: 15px; }
.plat:hover { color: var(--c-accent-dark); transform: translateY(-1px); }
.plat:hover .plat__icon { background: var(--c-accent); color: var(--c-white); }
.device { position: absolute; top: 0; right: 0; bottom: 0; z-index: 1; width: 50vw; pointer-events: none; }
.tile { position: absolute; left: var(--x); top: var(--y); width: var(--s); aspect-ratio: 1; animation: drift var(--d, 9s) ease-in-out var(--delay, 0s) infinite; will-change: transform; }
.tile::before { content: ""; position: absolute; inset: 4%; border-radius: var(--r-glow); background: var(--glow); color: var(--c-text); filter: blur(48px); transform: translateY(16%) scale(1.08); }
.tile__body { position: absolute; inset: 0; z-index: 1; border-radius: var(--r-tile); background: linear-gradient(150deg, var(--ga), var(--gb)); color: var(--c-text); transform: rotate(var(--r)); box-shadow: inset 0 0 0 1px var(--hl-edge), inset 0 2px 0 var(--hl-white), inset 0 -22px 40px -22px var(--shade-in), 0 30px 56px -30px var(--glow); -webkit-backdrop-filter: blur(10px) saturate(140%); backdrop-filter: blur(10px) saturate(140%); }
.tile__body::after { content: ""; position: absolute; inset: 0; border-radius: inherit; background: linear-gradient(160deg, var(--sheen) 0%, var(--c-clear) 44%); color: var(--c-text); }
.tile--a { --x: 9%; --y: 13%; --s: clamp(220px, 23vw, 360px); --r: -12deg; --ga: var(--tile-sky-a); --gb: var(--tile-sky-b); --glow: var(--glow-sky); --d: 9s; --delay: -1.2s; z-index: 2; }
.tile--b { --x: 54%; --y: -5%; --s: clamp(200px, 20vw, 320px); --r: 14deg; --ga: var(--tile-lime-a); --gb: var(--tile-lime-b); --glow: var(--glow-lime); --d: 10s; --delay: -4s; z-index: 1; }
.tile--c { --x: 62%; --y: 40%; --s: clamp(210px, 21vw, 330px); --r: 16deg; --ga: var(--tile-sun-a); --gb: var(--tile-sun-b); --glow: var(--glow-sun); --d: 8.5s; --delay: -2.6s; z-index: 2; }
.tile--d { --x: 32%; --y: 55%; --s: clamp(170px, 17vw, 270px); --r: -14deg; --ga: var(--tile-coral-a); --gb: var(--tile-coral-b); --glow: var(--glow-coral); --d: 9.5s; --delay: -6s; z-index: 3; }
.tile--e { --x: 1%; --y: 50%; --s: clamp(90px, 9vw, 140px); --r: 10deg; --ga: var(--tile-lime-a); --gb: var(--tile-sky-b); --glow: var(--glow-lime); --d: 8s; --delay: -3.4s; z-index: 3; }
.setting { position: absolute; left: var(--lx); top: var(--ly); z-index: 2; display: inline-flex; align-items: center; gap: 9px; padding: 8px 13px 8px 10px; border-radius: var(--r-setting); background: var(--frost); color: var(--c-text); font-size: var(--text-sm); font-weight: var(--weight-label); line-height: 1.2; white-space: nowrap; transform: rotate(calc(var(--r) * -0.4)); box-shadow: inset 0 0 0 1px var(--frost-edge), 0 10px 22px -12px var(--shadow-ink); -webkit-backdrop-filter: blur(14px); backdrop-filter: blur(14px); }
.tile--a .setting { --lx: 13%; --ly: 64%; }
.tile--b .setting { --lx: 15%; --ly: 63%; }
.tile--c .setting { --lx: 12%; --ly: 58%; }
.tile--d .setting { --lx: 9%; --ly: 60%; }
.switch { position: relative; width: 28px; height: 16px; flex-shrink: 0; border-radius: var(--r-pill); background: var(--c-accent); color: var(--c-white); }
.switch::after { content: ""; position: absolute; top: 2px; left: 14px; width: 12px; height: 12px; border-radius: var(--r-circle); background: var(--c-white); color: var(--c-text); box-shadow: 0 1px 2px var(--shadow-ink); }
.switch--off { background: var(--c-panel-2); color: var(--c-text); }
.switch--off::after { left: 2px; }
.setting__chev { width: 12px; height: 12px; color: var(--c-muted); }
@keyframes drift { 0%, 100% { transform: translate3d(0, -6px, 0); } 50% { transform: translate3d(0, 6px, 0); } }
.facts { background: var(--c-panel); color: var(--c-text); }
.facts__list { display: flex; justify-content: center; flex-wrap: wrap; gap: 10px 44px; margin: 0; padding-top: 22px; padding-bottom: 26px; font-family: var(--font-mono); font-size: var(--text-sm); line-height: 1.5; }
.facts__item { display: flex; flex-wrap: wrap; gap: 10px; }
.facts__item dt { color: var(--c-muted); }
.facts__item dd { margin: 0; color: var(--c-text); font-weight: var(--weight-medium); }
.footer { padding-top: 72px; padding-bottom: 28px; background: var(--c-panel); color: var(--c-text); }
.footer__grid { display: grid; grid-template-columns: 1.2fr 0.7fr 1.3fr 0.7fr; gap: 40px; }
.footer__intro { color: var(--c-muted); margin-top: 20px; font-size: var(--text-label); max-width: 300px; }
.footer__heading { font-size: var(--text-label); font-weight: var(--weight-heading); margin: 0 0 16px; }
.footer__links { list-style: none; padding: 0; margin: 0; }
.footer__links li + li { margin-top: 8px; }
.footer__links a { display: inline-block; padding-block: 3px; color: var(--c-muted); text-decoration: none; font-size: var(--text-label); overflow-wrap: anywhere; }
.footer__links a:hover { color: var(--c-accent-dark); }
.footer__bottom { margin-top: 48px; padding-top: 24px; border-top: 1px solid var(--c-border); display: flex; flex-wrap: wrap; align-items: center; gap: 12px 24px; color: var(--c-muted); font-size: var(--text-sm); }
.footer__legal { display: flex; flex-wrap: wrap; gap: 16px; margin-left: auto; }
.footer__legal a { color: var(--c-muted); }
.reveal { opacity: 1; transform: none; }
.reveal-pending .reveal:not(.shown) { opacity: 0; transform: translateY(18px); }
.reveal { transition: opacity var(--time-reveal) var(--ease), transform var(--time-reveal) var(--ease); }
.reveal.shown { opacity: 1; transform: none; }
@media (max-width: 1280px) {
  .masthead__inner { gap: 20px; }
  .topnav__item + .topnav__item::before { padding: 0 7px; }
  html:not([lang="zh-CN"]):not([lang="zh-TW"]) .topnav { display: none; }
  html:not([lang="zh-CN"]):not([lang="zh-TW"]) .menu-toggle { display: inline-flex; }
  html:not([lang="zh-CN"]):not([lang="zh-TW"]) .header-tools { margin-left: auto; }
}
@media (max-width: 1180px) {
  .hero__copy { max-width: 470px; }
  .footer__grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 960px) {
  .topnav { display: none; }
  .menu-toggle { display: inline-flex; }
  .header-tools { margin-left: auto; }
}
@media (max-width: 860px) {
  :root { --gutter: 20px; }
  .hero { height: auto; padding-top: 56px; padding-bottom: 64px; }
  .hero__copy { max-width: none; width: 100%; padding-bottom: 0; text-align: center; }
  .wordmark { font-size: var(--text-mobile-h1); }
  .hero__kw { font-size: var(--text-brand); }
  .hero__actions, .hero .row { justify-content: center; }
  .row__label { width: 100%; text-align: center; }
  .btn { min-height: 50px; padding: 11px 22px; font-size: var(--text-base); }
  .device { width: 100%; opacity: 0.38; }
  .tile--a { --x: -16%; --y: -4%; --s: 38vw; }
  .tile--b { --x: 78%; --y: -3%; --s: 32vw; }
  .tile--c { --x: 78%; --y: 84%; --s: 34vw; }
  .tile--d { --x: -14%; --y: 86%; --s: 30vw; }
  .tile--e, .setting { display: none; }
  .facts__list { justify-content: flex-start; gap: 8px 24px; }
  .grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .split { grid-template-columns: minmax(0, 1fr); gap: 32px; }
}
@media (max-width: 768px) {
  h1 { font-size: var(--text-mobile-h1); }
  .section { padding-top: 64px; padding-bottom: 64px; }
}
@media (max-width: 640px) {
  :root { --gutter: 16px; }
  .masthead__inner { gap: 8px; }
  .brand { gap: 7px; font-size: var(--text-base); }
  .brand__logo { width: 30px; height: 30px; }
  .lang { padding-inline: 10px; gap: 5px; }
  .lang > svg { display: none; }
  .header-tools { margin-left: auto; gap: 6px; }
  .grid, .grid--two, .grid--four { grid-template-columns: minmax(0, 1fr); }
  .card, .panel { padding: 24px; }
  .tilt, .card--tilt, .panel--tilt { transform: none !important; }
  .hero__lead { font-size: var(--text-base); }
  .hero__actions { gap: 10px; }
  .hero .btn { padding-inline: 20px; }
  .hero .row { gap: 8px 6px; }
  .hero .row__label { display: none; }
  .hero .chip { font-size: var(--text-xs); padding-inline: 10px; }
  .plat { padding-right: 10px; gap: 5px; font-size: var(--text-sm); }
  .footer__grid { gap: 32px 20px; }
  .footer__brand { grid-column: 1 / -1; }
  .footer__legal { margin-left: 0; }
  pre { padding: 18px; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation: none !important; transition: none !important; }
  .reveal-pending .reveal:not(.shown) { opacity: 1; transform: none; }
}