:root {
  --bg: #FFFFFF;
  --bg-panel: #F6F6F8;
  --bg-panel-2: #F0EFFC;
  --border: #E3E3E8;
  --border-strong: #D2D2DA;
  --accent: #4B3FDB;
  --accent-dark: #3328B0;
  --accent-ring: #BDB7F3;
  --accent-ghost: #E4E1FB;
  --text: #111114;
  --text-muted: #5E5E6A;
  --text-faint: #8D8D98;
  --on-accent: #FFFFFF;
  --success: #0E9F9A;
  --success-soft: rgba(14, 159, 154, .18);
  --warn: #C98A0B;
  --error: #D63A3A;
  --veil: rgba(17, 17, 20, .24);
  --transparent: transparent;
  --font-display: "Inter", "Noto Sans SC", "PingFang SC", "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;
  --r-tiny: 4px;
  --r-control: 6px;
  --r-card: 8px;
  --r-plate: 12px;
  --r-pill: 999px;
  --r-circle: 50%;
  --shadow-hair: 0 1px 2px rgba(17, 17, 20, .04);
  --shadow-window: 0 1px 2px rgba(17, 17, 20, .04), 0 22px 44px -24px rgba(51, 40, 176, .22);
  --shadow-lift: 0 2px 4px rgba(17, 17, 20, .05), 0 16px 30px -12px rgba(51, 40, 176, .26);
  --wrap: 1248px;
  --header-wrap: 1280px;
  --reading: 800px;
  --gutter: 48px;
  --nav-h: 72px;
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 20px;
  --space-6: 24px;
  --space-8: 32px;
  --space-10: 40px;
  --space-12: 48px;
  --space-16: 64px;
  --space-section: 120px;
  --size-small: 13px;
  --size-body: 16px;
  --size-lead: 17px;
  --size-h1: clamp(34px, 3.3vw, 48px);
  --size-h2: clamp(28px, 3.6vw, 52px);
  --size-h3: 24px;
  --weight-normal: 400;
  --weight-medium: 500;
  --weight-bold: 600;
  --weight-heavy: 700;
  --weight-display: 800;
  --tracking-display: -.02em;
  --ease-ui: .15s ease;
  --ease-reveal: .6s ease;
}
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; scroll-padding-top: 24px; }
html.nav-open { overflow: hidden; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  font-size: var(--size-body);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
[hidden] { display: none !important; }
a { color: inherit; text-decoration: none; }
button, input, select, textarea { font: inherit; color: inherit; }
button { cursor: pointer; }
button:disabled { cursor: not-allowed; }
img, video { max-width: 100%; height: auto; }
svg { flex-shrink: 0; vertical-align: middle; }
button svg, .icon { width: 20px; height: 20px; flex-shrink: 0; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; border-radius: var(--r-tiny); }
::selection { background: var(--accent-ghost); color: var(--text); }
h1, h2, h3, h4 { font-family: var(--font-display); text-wrap: balance; }
h1 { margin: 0; font-size: var(--size-h1); font-weight: var(--weight-display); line-height: 1.14; letter-spacing: var(--tracking-display); }
h2 { margin: 0 0 var(--space-6); font-size: var(--size-h2); font-weight: var(--weight-display); line-height: 1.2; letter-spacing: var(--tracking-display); }
h3 { margin: 0 0 var(--space-3); font-size: var(--size-h3); font-weight: var(--weight-heavy); line-height: 1.35; }
p { margin: 0 0 var(--space-5); }
strong { font-weight: var(--weight-bold); }
code, pre, kbd { font-family: var(--font-mono); }
code { overflow-wrap: anywhere; }
:not(pre) > code { padding: 1px 6px; border: 1px solid var(--border); border-radius: var(--r-tiny); background: var(--bg-panel); color: var(--text); font-size: .86em; }
pre { max-width: 100%; min-width: 0; margin: var(--space-6) 0; padding: var(--space-6); overflow-x: auto; background: var(--bg-panel); color: var(--text); border: 1px solid var(--border); border-radius: var(--r-card); font-size: var(--size-small); }
pre code { white-space: pre; overflow-wrap: normal; word-break: normal; }
hr { border: 0; border-top: 1px solid var(--border); margin: var(--space-10) 0; }
.wrap { width: 100%; max-width: calc(var(--wrap) + var(--gutter) * 2); margin-inline: auto; padding-inline: var(--gutter); }
.reading { max-width: calc(var(--reading) + var(--gutter) * 2); }
.section { padding-top: var(--space-section); padding-bottom: var(--space-section); }
.section-panel { background: var(--bg-panel); color: var(--text); border-block: 1px solid var(--border); }
.section-heading { max-width: 840px; margin-bottom: var(--space-12); }
.grid { display: grid; gap: var(--space-6); }
.grid-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid > *, .hero-grid > *, .footer-grid > *, .settings-tabs > *, .f-pair > * { min-width: 0; }
.stack { display: flex; flex-direction: column; gap: var(--space-6); min-width: 0; }
.flow-row { display: flex; align-items: center; flex-wrap: wrap; gap: var(--space-3); }
.nowrap { white-space: nowrap; }
.muted { color: var(--text-muted); }
.small { font-size: var(--size-small); }
.mono { font-family: var(--font-mono); }
.text-link { color: var(--accent); font-weight: var(--weight-bold); text-underline-offset: 4px; }
.text-link:hover { text-decoration: underline; }
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; clip-path: inset(50%); overflow: hidden; white-space: nowrap; border: 0; }
.btn {
  display: inline-flex; justify-content: center; align-items: center; gap: 10px;
  min-height: 50px; padding: 10px 24px; max-width: 100%;
  border: 1px solid var(--transparent); border-radius: var(--r-control);
  font-size: var(--size-body); font-weight: var(--weight-bold); line-height: 1.4;
  text-align: center; transition: background-color var(--ease-ui), border-color var(--ease-ui);
}
.btn svg { width: 18px; height: 18px; }
.btn-primary { background: var(--accent); color: var(--on-accent); }
.btn-primary:hover, .btn-primary.is-hover { background: var(--accent-dark); color: var(--on-accent); }
.btn-primary:active, .btn-primary.is-active { background: var(--accent-dark); color: var(--on-accent); box-shadow: inset 0 0 0 2px var(--accent-ring); }
.btn-ghost { background: var(--bg); color: var(--text); border-color: var(--border-strong); }
.btn-ghost:hover, .btn-ghost.is-hover { border-color: var(--text); }
.btn-ghost:active { background: var(--bg-panel); color: var(--text); }
.btn:disabled, .btn[aria-disabled="true"] { background: var(--bg-panel); color: var(--text-muted); border-color: var(--border); }
.btn-small { min-height: 40px; padding: 8px 16px; font-size: 14px; }
.cta { display: flex; flex-wrap: wrap; gap: var(--space-3); margin-top: var(--space-8); }
.card, .panel { min-width: 0; padding: var(--space-8); border: 1px solid var(--border); border-radius: var(--r-card); background: var(--bg); color: var(--text); }
.panel-soft { background: var(--bg-panel); color: var(--text); }
.card p:last-child, .panel p:last-child { margin-bottom: 0; }
.prose { min-width: 0; line-height: 1.85; }
.prose h2 { margin-top: var(--space-16); font-size: clamp(26px, 3vw, 36px); }
.prose h3 { margin-top: var(--space-8); }
.prose a:not(.btn) { color: var(--accent); text-decoration: underline; text-underline-offset: 4px; }
.prose li + li { margin-top: var(--space-2); }
.prose :where(ul, ol) { padding-left: 1.5em; }
.masthead, #site-header { position: relative; z-index: 50; background: var(--bg); color: var(--text); border-bottom: 1px solid var(--border); }
.masthead-row { display: flex; align-items: center; min-height: var(--nav-h); }
.header-wrap { max-width: min(100%, calc(var(--header-wrap) + var(--gutter) * 2)); margin-inline: auto; padding-inline: var(--gutter); }
.brand { display: inline-flex; align-items: center; gap: 10px; flex-shrink: 0; font-family: var(--font-display); font-weight: var(--weight-display); font-size: 18px; letter-spacing: var(--tracking-display); }
.brand-mark { width: 32px; height: 32px; display: block; flex-shrink: 0; }
.tabs { align-self: stretch; margin-left: 64px; min-width: 0; }
.tabs ul { display: flex; align-items: center; list-style: none; margin: 0; padding: 0; gap: 36px; height: 100%; }
.tabs li { height: 100%; }
.tabs a { position: relative; display: flex; align-items: center; height: 100%; min-height: var(--nav-h); font-size: 15px; font-weight: var(--weight-medium); color: var(--text-muted); white-space: nowrap; }
.tabs a:hover { color: var(--text); }
.tabs a[aria-current="page"] { color: var(--text); font-weight: var(--weight-bold); }
.tabs a[aria-current="page"]::after { content: ""; position: absolute; inset-inline: 0; bottom: -1px; height: 2px; background: var(--accent); border-radius: var(--r-tiny); }
.header-tools { display: flex; align-items: center; gap: var(--space-2); margin-left: auto; flex-shrink: 0; }
.language-picker { position: relative; }
.lang { display: inline-flex; align-items: center; gap: 8px; min-height: 36px; padding: 6px 12px; border: 1px solid var(--border); border-radius: var(--r-control); background: var(--bg); color: var(--text); font-size: 14px; font-weight: var(--weight-medium); white-space: nowrap; }
.lang:hover { border-color: var(--border-strong); }
.lang svg { width: 16px; height: 16px; }
.lang-caret { color: var(--text-muted); font-size: 12px; }
.lang-short { display: none; }
.language-menu { position: absolute; z-index: 5; top: calc(100% + 8px); right: 0; min-width: 180px; padding: var(--space-2); margin: 0; list-style: none; border: 1px solid var(--border); border-radius: var(--r-card); background: var(--bg); color: var(--text); box-shadow: var(--shadow-window); }
.language-menu a { display: flex; align-items: center; min-height: 44px; padding: 8px 12px; border-radius: var(--r-control); }
.language-menu a:hover, .language-menu a[aria-current="true"] { background: var(--bg-panel-2); color: var(--accent-dark); }
.menu-toggle { display: none; align-items: center; justify-content: center; min-width: 44px; min-height: 44px; padding: 8px; background: var(--bg); color: var(--text); border: 1px solid var(--border); border-radius: var(--r-control); }
.mobile-drawer { display: none; }
.nav-veil { position: fixed; z-index: 0; inset: var(--nav-h) 0 0; border: 0; padding: 0; background: var(--veil); color: var(--text); }
.preview-mobile { display: none; }
.site-footer { padding-top: var(--space-16); padding-bottom: var(--space-8); background: var(--bg); color: var(--text); border-top: 1px solid var(--border); }
.footer-grid { display: grid; grid-template-columns: 1.25fr .85fr 1.4fr .8fr; gap: var(--space-12); }
.footer-about p { margin-top: var(--space-5); max-width: 310px; font-size: 14px; color: var(--text-muted); }
.footer-heading { margin: 0 0 var(--space-5); font-size: 14px; font-weight: var(--weight-heavy); }
.footer-links { margin: 0; padding: 0; list-style: none; display: grid; gap: var(--space-2); }
.footer-links a { display: inline-block; padding-block: 4px; color: var(--text-muted); font-size: 14px; overflow-wrap: anywhere; }
.footer-links a:hover { color: var(--accent); }
.footer-bottom { margin-top: var(--space-12); padding-top: var(--space-6); border-top: 1px solid var(--border); font-size: var(--size-small); color: var(--text-muted); }
.reveal { opacity: 1; }
.reveal.reveal-pending { opacity: 0; transform: translateY(16px); transition: opacity var(--ease-reveal), transform var(--ease-reveal); }
.reveal.shown { opacity: 1; transform: none; }
.hero, .decorated-section { overflow-x: clip; }
.hero { padding-top: 72px; padding-bottom: 96px; }
.hero-grid { display: grid; grid-template-columns: 590px minmax(0, 1fr); gap: 88px; align-items: center; }
.copy { max-width: 570px; }
.kicker { display: flex; align-items: center; gap: 12px; margin: 0 0 18px; font-family: var(--font-mono); font-size: var(--size-small); color: var(--text-muted); }
.kicker::before { content: ""; width: 20px; height: 1.5px; flex-shrink: 0; background: var(--text); }
.h1-line { display: block; }
.lead { max-width: 530px; margin: 22px 0 0; font-size: var(--size-lead); line-height: 1.75; color: var(--text-muted); }
.lead strong { color: var(--text); }
.specs { display: flex; flex-direction: column; gap: 18px; margin-top: 32px; }
.spec-row { display: flex; align-items: center; flex-wrap: wrap; gap: 14px; }
.spec-label { min-width: 72px; font-size: var(--size-small); color: var(--text-muted); }
.chips { display: flex; flex-wrap: wrap; gap: 8px; margin: 0; padding: 0; list-style: none; }
.chip { min-height: 28px; display: inline-flex; align-items: center; padding: 3px 10px; border: 1px solid var(--border); border-radius: var(--r-control); background: var(--bg-panel); color: var(--text); font-family: var(--font-mono); font-size: 12.5px; max-width: 100%; overflow-wrap: anywhere; }
.spec-row.is-platforms { padding-top: 18px; border-top: 1px solid var(--border); }
.platforms { display: flex; flex-wrap: wrap; row-gap: 12px; margin: 0; padding: 0; list-style: none; }
.platforms li { display: inline-flex; padding-inline: 18px; border-left: 1px solid var(--border); font-size: 14px; font-weight: var(--weight-bold); }
.platforms li:first-child { padding-left: 0; border-left: 0; }
.platforms a { display: inline-flex; align-items: center; gap: 8px; }
.platforms a:hover { color: var(--accent); }
.pf-ico { width: 17px; height: 17px; flex-shrink: 0; display: block; }
.next { padding-top: 40px; padding-bottom: 120px; background: var(--bg-panel); color: var(--text); border-top: 1px solid var(--border); }
.next-kicker { margin: 0; font-family: var(--font-mono); font-size: var(--size-small); color: var(--text-muted); }
.next h2 { margin: 12px 0 40px; font-size: clamp(26px, 2.6vw, 38px); }
@media (max-width: 960px) {
  .desktop-nav { display: none; }
  .header-tools { margin-left: auto; }
  .menu-toggle { display: flex; }
  .masthead-row { position: relative; z-index: 2; background: var(--bg); color: var(--text); }
  .mobile-drawer:not([hidden]) { display: block; position: absolute; z-index: 2; inset: var(--nav-h) 0 auto; padding: var(--space-4) var(--gutter) var(--space-6); max-height: calc(100dvh - var(--nav-h)); overflow-y: auto; overscroll-behavior: contain; background: var(--bg); color: var(--text); border-bottom: 1px solid var(--border); }
  .mobile-drawer ul { margin: 0; padding: 0; list-style: none; }
  .mobile-drawer a { display: flex; align-items: center; width: 100%; min-height: 48px; padding: 12px 16px; border-radius: var(--r-control); }
  .mobile-drawer a[aria-current] { background: var(--bg-panel-2); color: var(--accent-dark); }
  .drawer-languages { margin-top: var(--space-4) !important; padding-top: var(--space-4) !important; border-top: 1px solid var(--border); }
  .preview-mobile { display: block; margin-left: auto; }
  .preview-mobile summary { min-height: 44px; padding: 10px; cursor: pointer; }
  .preview-mobile nav { position: absolute; z-index: 4; left: 0; right: 0; top: var(--nav-h); padding: 16px var(--gutter); background: var(--bg); color: var(--text); border-bottom: 1px solid var(--border); }
  .preview-mobile nav a { display: block; min-height: 44px; padding: 10px; }
}
@media (max-width: 1240px) {
  .hero-grid { grid-template-columns: minmax(0, 1fr); gap: 56px; }
  .copy { order: -1; max-width: 640px; }
  .rig-frame { display: flex; justify-content: center; }
}
@media (max-width: 960px) {
  .footer-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: var(--space-8); }
  .grid-3 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 768px) {
  :root { --size-h1: clamp(24px, 7.2vw, 30px); --space-section: 72px; }
}
@media (max-width: 720px) {
  :root { --gutter: 20px; }
  .hero { padding-top: 40px; padding-bottom: 64px; }
  .lead { font-size: 15.5px; }
  .btn { min-height: 46px; padding: 10px 18px; font-size: 15px; }
  .rig-frame { width: 331px; height: 336px; max-width: 100%; margin-inline: auto; display: block; overflow: hidden; }
  .rig { transform: scale(.56); transform-origin: top left; }
  .platforms li { padding-inline: 12px; }
  .lang-long { display: none; }
  .lang-short { display: inline; }
  .brand { font-size: 16px; gap: 8px; }
}
@media (max-width: 640px) {
  .grid-2, .grid-3 { grid-template-columns: minmax(0, 1fr); }
  .card, .panel { padding: var(--space-6); }
  .tilt, [data-tilt] { transform: none !important; }
  .chips { flex-direction: row; flex-wrap: wrap; }
  .footer-grid { grid-template-columns: minmax(0, 1fr); }
}
@media (max-width: 370px) {
  :root { --gutter: 16px; }
  .brand { font-size: 14px; }
  .brand-mark { width: 28px; height: 28px; }
  .lang { padding-inline: 8px; }
  .rig-frame { width: 288px; height: 294px; }
  .rig { transform: scale(.488); }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation: none !important; transition: none !important; }
  .reveal.reveal-pending { opacity: 1; transform: none; }
}