:root {
  color-scheme: light;
  --paper: #f8f7f2;
  --ink: #24241f;
  --muted: #62615a;
  --orange: #c34b20;
  --line: #dcdad1;
  --sans: "Inter", "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 24px; }
body { margin: 0; color: var(--ink); background: var(--paper); font: 16px/1.6 var(--sans); -webkit-font-smoothing: antialiased; }
a { color: inherit; text-decoration: none; }
a, button { -webkit-tap-highlight-color: transparent; }
button { font: inherit; cursor: pointer; }
a:focus-visible, button:focus-visible { outline: 3px solid #ed7139; outline-offset: 5px; }
h1, h2, h3, p, figure { margin: 0; }
[hidden] { display: none !important; }
.wrap { width: min(1320px, 90%); margin-inline: auto; }
.icon, .swap { width: 19px; height: 19px; flex: none; }
.skip { position: absolute; top: -100px; left: 12px; z-index: 4; background: var(--ink); color: white; padding: 10px; }
.skip:focus { top: 8px; }
.header-inner, .footer-inner { display: flex; align-items: center; }
.header { border-bottom: 1px solid var(--line); }
.header-inner { min-height: 78px; gap: 48px; }
.wordmark { display: inline-flex; align-items: center; gap: 9px; font-size: 26px; font-weight: 750; line-height: 1; letter-spacing: -1.6px; }
.wordmark img { filter: grayscale(1) brightness(.66); }
nav { display: flex; align-items: center; margin-left: auto; gap: 36px; font-size: 14px; }
nav a, .text-link, .back { transition: color .18s; }
nav a:hover, .text-link:hover, .back:hover { color: var(--orange); }
.header-download, .btn { display: inline-flex; justify-content: center; align-items: center; gap: 11px; font-size: 14px; font-weight: 650; border-radius: 7px; }
.header-download { background: var(--ink); color: white; padding: 9px 16px; }
.header-download:hover { background: #44443b; }
.header-download .icon { width: 16px; height: 16px; }
.hero { display: grid; grid-template-columns: minmax(0, .86fr) minmax(0, 1.14fr); align-items: center; gap: clamp(26px, 4vw, 70px); padding-block: clamp(42px, 4.4vw, 74px); }
.platforms, .platforms span, .hero-actions, .text-link { display: flex; align-items: center; }
.platforms { gap: 12px; color: #4b4a41; font-weight: 620; font-size: 13px; letter-spacing: .01em; }
.platforms span { gap: 6px; }
.platforms .icon, .platforms .swap { width: 16px; height: 16px; }
.platforms .swap { color: var(--orange); }
h1 { margin: 22px 0 19px; font-size: clamp(52px, 5.55vw, 86px); letter-spacing: -.07em; line-height: 1.16; font-weight: 800; }
h1 em { color: var(--orange); font-style: normal; }
.hero-copy > p { color: var(--muted); font-size: clamp(15px, 1.22vw, 19px); line-height: 1.85; }
.hero-actions { flex-wrap: wrap; gap: 26px; margin-top: 28px; }
.btn { min-height: 48px; padding: 12px 21px; }
.primary { background: var(--orange); color: white; box-shadow: inset 0 -1px 0 #963915; }
.primary:hover { background: #ab3e17; }
.text-link { gap: 8px; font-size: 14px; font-weight: 650; }
.text-link .icon { width: 17px; }
.hero-art { overflow: hidden; border-radius: 13px; background: #d16a32; }
.hero-art img { display: block; width: 100%; height: auto; }
h2 { font-size: clamp(29px, 2.9vw, 44px); line-height: 1.35; font-weight: 740; letter-spacing: -.045em; }
.features { border-top: 1px solid var(--line); padding-block: 40px 64px; }
.cards { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 19px; margin-top: 24px; }
.card { border: 1px solid var(--line); border-radius: 12px; overflow: hidden; background: #fffefa; }
.diagram { height: clamp(112px, 9vw, 140px); display: flex; align-items: center; justify-content: center; position: relative; overflow: hidden; border-bottom: 1px solid #dedcd042; }
.connection { background-color: #f2e9db; background-image: radial-gradient(#d7cbbb 1px, transparent 1px); background-size: 9px 9px; }
.mini-device { display: grid; place-items: center; width: 62px; height: 56px; border: 1px solid #b9b19e; background: #fffaf0; border-radius: 9px; color: #665944; box-shadow: 0 3px 0 #c6bba7; }
.mini-device svg { width: 42px; height: 42px; }
.mini-phone { width: 46px; }
.mini-phone svg { width: 35px; height: 35px; }
.connection-line { display: flex; align-items: center; color: var(--orange); }
.connection-line svg { width: 25px; height: 25px; margin-inline: 4px; }
.connection-line i { width: 14px; border-top: 1px dashed #af794f; }
.transfer { background: repeating-linear-gradient(135deg,#e9ede2 0 7px,#e6ebdd 7px 8px); }
.file-sheet { display: flex; gap: 12px; align-items: center; width: 205px; background: #fafff5; border: 1px solid #b2bfaa; border-radius: 8px; padding: 12px; color: #4b6545; box-shadow: -4px 5px 0 #d8dfce, -5px 6px 0 #b6c0ac; transform: rotate(-3deg); }
.file-sheet > svg { width: 29px; height: 29px; }
.file-sheet b { font-size: 11px; }
.file-sheet > div { flex: 1; }
.progress { height: 4px; background: #79906e; margin-top: 5px; border-radius: 2px; }
.file-sheet .file-check { width: 17px; }
.permission { background-color: #f0e7dc; background-image: linear-gradient(#ded2c244 1px,transparent 1px),linear-gradient(90deg,#ded2c244 1px,transparent 1px); background-size: 16px 16px; }
.shield-ring { width: 73px; height: 73px; border-radius: 50%; display: grid; place-items: center; background: #fdf7ed; outline: 1px dashed #c7aa8e; outline-offset: 5px; border: 1px solid #d5c2ae; color: #ae5b34; }
.shield-ring svg { width: 40px; height: 40px; }
.permit { border-radius: 20px; background: #fffdfa; border: 1px solid #c9bbaa; padding: 3px 8px; font-size: 11px; transform: translate(-14px,19px); }
.permit i { display: inline-block; width: 6px; height: 6px; background: #65815c; border-radius: 50%; }
.card-copy { padding: 21px 24px 24px; }
h3 { font-size: 21px; line-height: 1.4; font-weight: 700; }
.card-copy p, .guides p { margin-top: 9px; font-size: 15px; line-height: 1.8; color: var(--muted); }
.guide { background: #272923; color: #fffdf3; padding-block: 64px; }
.guide-layout { display: grid; grid-template-columns: .85fr 1.15fr; gap: 8%; }
.guide-layout > div > p { margin-top: 16px; color: #cdcdc0; }
.switches { display: inline-flex; padding: 3px; border: 1px solid #626358; border-radius: 8px; margin-top: 28px; }
.switches button { color: #d6d7cc; background: transparent; border: 0; padding: 8px 16px; border-radius: 5px; font-size: 14px; }
.switches button[aria-pressed=true] { color: #26271f; background: #f5f3e8; }
.guides ol { padding: 0; margin: 0; list-style: none; counter-reset: step; }
.guides li { position: relative; padding: 19px 0 20px 49px; border-top: 1px solid #51534a; counter-increment: step; }
.guides li:first-child { padding-top: 0; border: 0; }
.guides li:last-child { padding-bottom: 0; }
.guides li::before { content: counter(step, decimal-leading-zero); position: absolute; left: 0; color: #f79a69; font: 15px/1.9 "Consolas", monospace; }
.guides p { color: #cdcdc0; margin-top: 5px; }
.guides h3 { font-size: 19px; }
.fallback-heading { margin: 24px 0 14px; }
.downloads { padding-block: 56px 72px; }
.download-list { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; margin-top: 26px; }
.download-list article { display: flex; align-items: center; gap: 18px; padding: 24px; background: #fffefa; border: 1px solid var(--line); border-radius: 10px; }
.platform-icon { width: 34px; height: 34px; }
.download-list p { font-size: 13px; color: var(--muted); margin-top: 2px; }
.availability, .release-link { margin-left: auto; white-space: nowrap; }
.availability { font-size: 13px; color: #6c665b; }
.release-link { font-size: 14px; color: var(--orange); text-decoration: underline; text-underline-offset: 4px; }
footer { border-top: 1px solid var(--line); }
.footer-inner { justify-content: space-between; padding-block: 24px; }
footer .wordmark { font-size: 20px; letter-spacing: -1px; }
.back { font-size: 13px; }
@media(max-width: 900px) {
  .header-inner { gap: 30px; }
  .hero { grid-template-columns: .95fr 1.05fr; gap: 25px; }
  .hero-actions { gap: 16px; }
  .desktop-break { display: none; }
  .card-copy { padding: 18px; }
  .download-list article { padding: 18px; gap: 12px; }
}
@media(max-width: 700px) {
  .wrap { width: calc(100% - 40px); }
  .header-inner { min-height: 63px; gap: 18px; }
  .wordmark { font-size: 21px; gap: 6px; letter-spacing: -1.2px; }
  .wordmark img { width: 27px; height: 27px; }
  nav { gap: 16px; font-size: 13px; }
  .header-download { font-size: 12px; padding: 7px 10px; gap: 6px; }
  .hero { grid-template-columns: 1fr; gap: 28px; padding-block: 37px 32px; }
  h1 { font-size: clamp(52px, 9.6vw, 66px); margin-block: 16px; }
  .hero-actions { margin-top: 22px; gap: 24px; }
  .hero-art { border-radius: 10px; }
  .features { padding-block: 28px 38px; }
  .cards { grid-template-columns: 1fr; gap: 14px; margin-top: 18px; }
  .card { display: grid; grid-template-columns: minmax(110px,.7fr) 1.3fr; }
  .diagram { height: 100%; min-height: 130px; }
  .connection-line i { width: 1px; }
  .connection-line svg { width: 17px; margin-inline: 2px; }
  .mini-device { width: 39px; height: 40px; }
  .mini-device svg { width: 30px; height: 30px; }
  .mini-phone { width: 29px; }
  .file-sheet { width: min(86%,165px); gap: 6px; padding: 8px; }
  .file-sheet > svg { width: 21px; }
  .file-sheet .file-check { display: none; }
  .shield-ring { width: 44px; height: 44px; }
  .shield-ring svg { width: 28px; height: 28px; }
  .permit { transform: translate(-5px,14px); }
  .card-copy { padding: 16px; }
  .card-copy h3 { font-size: 18px; }
  .card-copy p { font-size: 14px; margin-top: 6px; }
  .guide { padding-block: 38px; }
  .guide-layout, .download-list { grid-template-columns: 1fr; }
  .guide-layout { gap: 30px; }
  .switches { margin-top: 18px; }
  .downloads { padding-block: 38px; }
  .download-list { gap: 12px; margin-top: 18px; }
}
@media(max-width: 465px) {
  .header-inner { flex-wrap: wrap; column-gap: 10px; row-gap: 0; padding-top: 13px; }
  .header-download { margin-left: auto; }
  nav { order: 3; flex-basis: 100%; margin: 0; padding-block: 9px; }
}
@media(prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition: none !important; }
}
nav [aria-current="page"] { color: var(--orange); text-decoration: underline; text-underline-offset: 6px; }
.subpage { padding-block: clamp(38px, 5.5vw, 84px) clamp(46px, 6vw, 92px); }
.subpage h1 { margin: 0 0 25px; font-size: clamp(44px, 4.6vw, 68px); }
.story-lead, .contact-lead { display: grid; grid-template-columns: 1fr 1fr; align-items: center; gap: clamp(28px, 6vw, 96px); }
.subpage .intro { font-size: clamp(19px, 1.6vw, 25px); line-height: 1.65; color: var(--ink); }
.story-lead p + p { margin-top: 14px; max-width: 38em; color: var(--muted); line-height: 1.85; }
.story-lead .text-link { display: inline-flex; margin-top: 20px; color: var(--orange); }
.story-image { display: block; width: 100%; height: auto; border-radius: 12px; }
.story-notes { display: grid; grid-template-columns: .8fr 1.2fr; gap: 7%; margin-top: clamp(34px, 5vw, 78px); padding-top: clamp(28px, 3vw, 46px); border-top: 1px solid var(--line); }
.story-notes h2 { font-size: clamp(25px, 2.25vw, 35px); }
.editorial-rows article + article { border-top: 1px solid var(--line); margin-top: 23px; padding-top: 23px; }
.editorial-rows p { max-width: 42em; margin-top: 7px; color: var(--muted); line-height: 1.85; }
.contact-lead { grid-template-columns: .9fr 1.1fr; }
.mail-panel { min-width: 0; border-radius: 12px; padding: clamp(24px, 3.4vw, 52px); color: var(--paper); background: #2b2c25; }
.mail-panel h2 { font-size: 16px; color: #eeab83; }
.email-address { display: inline-flex; flex-wrap: wrap; align-items: center; gap: .22em; margin: 10px 0 14px; font-size: clamp(27px, 3.25vw, 52px); font-weight: 620; line-height: 1.2; letter-spacing: -.045em; }
.email-address span { font-size: .65em; color: #eeab83; }
.email-address:hover { text-decoration: underline; text-underline-offset: .15em; text-decoration-thickness: 1px; }
.mail-panel p { font-size: 14px; color: #d1d0c5; }
.contact-topics h3 a { display: inline-flex; align-items: center; gap: .5em; }
.contact-topics h3 span, .contact-topics a:hover { color: var(--orange); }
@media(max-width: 760px) {
  .header-inner { flex-wrap: wrap; gap: 0 14px; padding-top: 12px; }
  .header-download { margin-left: auto; }
  nav { order: 3; flex-basis: 100%; margin: 0; padding-block: 10px; gap: clamp(10px, 4vw, 26px); }
  .story-lead, .contact-lead, .story-notes { grid-template-columns: 1fr; gap: 23px; }
  .subpage h1 { margin-bottom: 16px; }
}