:root {
  --c-bg: #FDFDFA;
  --c-panel: #FFFFFF;
  --c-panel-2: #F7F5F2;
  --c-border: #ECE9E4;
  --c-border-strong: #DFDBD5;
  --c-accent: #E8524A;
  --c-accent-dark: #C23B33;
  --c-accent-wash: #FBE9E5;
  --c-accent-wash-2: #FDF4F1;
  --c-accent-soft: #FCE6E2;
  --c-accent-blob: #F8DAD3;
  --c-accent-line: #F5DDD7;
  --c-mark: #FADAD3;
  --c-text: #23201E;
  --c-text-muted: #6B6763;
  --c-text-faint: #A39D97;
  --c-success: #2A9D8F;
  --c-success-ink: #17675F;
  --c-success-wash: #EAF5F2;
  --c-warn: #F2A93B;
  --c-warn-ink: #805115;
  --c-warn-wash: #FFF4DF;
  --c-error: #B42318;
  --c-device: #2E2B29;
  --c-device-edge: #4B4643;
  --c-switch-off: #D9D5CF;
  --c-veil: rgba(255,255,255,.62);
  --c-arc: rgba(232,82,74,.26);
  --c-overlay: rgba(35,32,30,.25);
  --c-clear: transparent;

  --sh-hair: 0 1px 2px rgba(35,32,30,.05);
  --sh-card: 0 1px 2px rgba(35,32,30,.05), 0 10px 24px -12px rgba(35,32,30,.14);
  --sh-window: 0 1px 3px rgba(35,32,30,.06), 0 24px 52px -20px rgba(35,32,30,.24);
  --sh-phone: 0 4px 10px rgba(35,32,30,.14), 0 36px 64px -18px rgba(35,32,30,.42);
  --sh-knob: 0 1px 2px rgba(35,32,30,.22);
  --sh-accent: 0 12px 24px -12px rgba(194,59,51,.6);
  --sh-button: 0 4px 0 var(--c-accent-dark), var(--sh-accent);
  --sh-button-neutral: 0 4px 0 var(--c-border-strong);
  --sh-confirm: 0 3px 0 var(--c-accent-dark), var(--sh-accent);

  --f-display: "Inter","Noto Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,sans-serif;
  --f-body: "Inter","Noto Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,sans-serif;
  --f-mono: "JetBrains Mono",ui-monospace,"SFMono-Regular",Menlo,Consolas,monospace;
  --weight-regular: 400;
  --weight-medium: 500;
  --weight-semibold: 600;
  --weight-bold: 700;
  --weight-display: 800;
  --r-card: 20px;
  --r-panel: 28px;
  --r-btn: 12px;
  --r-win: 14px;
  --r-field: 8px;
  --r-focus: 6px;
  --r-small: 4px;
  --r-tiny: 2px;
  --r-platform: 10px;
  --r-phone: 30px;
  --r-screen: 23px;
  --r-confirm: 13px;
  --r-geo-a: 104px;
  --r-geo-b: 128px;
  --r-pill: 999px;
  --r-circle: 50%;
  --gutter: 64px;
  --width-shell: 1440px;
  --width-reading: 960px;
  --width-header-content: 1280px;
  --header-height: 84px;
  --section-space: 112px;
  --feature-space: 160px;
  --motion-short: .12s;
  --motion-reveal: .6s;
  --ease-soft: cubic-bezier(.2,.65,.3,1);
}

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
html.nav-open { overflow: hidden; }
body {
  margin: 0;
  background: var(--c-bg);
  color: var(--c-text);
  font-family: var(--f-body);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}
img, svg { vertical-align: middle; }
img { max-width: 100%; height: auto; }
button, input, select, textarea { font: inherit; }
button, summary { cursor: pointer; }
button { color: inherit; }
a { color: inherit; text-underline-offset: .22em; }
a:hover { text-decoration-thickness: 2px; }
:focus-visible { outline: 2px solid var(--c-accent-dark); outline-offset: 3px; border-radius: var(--r-focus); }
[hidden] { display: none !important; }
h1, h2, h3, h4 { font-family: var(--f-display); text-wrap: balance; }
h1 { margin: 0; font-size: clamp(34px,3.2vw,48px); font-weight: var(--weight-display); line-height: 1.17; letter-spacing: -.02em; }
h2 { margin: 0 0 24px; font-size: clamp(27px,2.7vw,40px); font-weight: var(--weight-display); line-height: 1.25; letter-spacing: -.02em; }
h3 { margin: 0 0 16px; font-size: clamp(22px,2vw,30px); font-weight: var(--weight-display); line-height: 1.3; letter-spacing: -.015em; }
p { margin: 0 0 1em; }
ul, ol { padding-inline-start: 1.5em; }
code { font-family: var(--f-mono); font-size: .88em; overflow-wrap: anywhere; }
pre { max-width: 100%; min-width: 0; overflow-x: auto; padding: 22px; border: 1px solid var(--c-border); border-radius: var(--r-win); background: var(--c-panel-2); color: var(--c-text); }
pre code { white-space: pre; overflow-wrap: normal; word-break: normal; }
blockquote { margin-inline: 0; }
section, article, div, main, aside, nav { min-width: 0; }
svg, .icon, .dot { flex-shrink: 0; }
section[id], h2[id], h3[id], [role="tabpanel"] { scroll-margin-top: 24px; }
.shell, .wrap { width: 100%; max-width: var(--width-shell); 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); }
.stack { display: grid; gap: 24px; }
.cluster { display: flex; align-items: center; flex-wrap: wrap; gap: 12px; }
.two-up { display: grid; grid-template-columns: repeat(2,minmax(0,1fr)); gap: 28px; }
.nowrap { white-space: nowrap; }
.muted { color: var(--c-text-muted); }
.mono { font-family: var(--f-mono); }
.text-link { color: var(--c-accent-dark); font-weight: var(--weight-semibold); }
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip-path: inset(50%); white-space: nowrap; border: 0; }
.skip-link { position: fixed; top: 8px; left: 16px; z-index: 100; padding: 12px 16px; transform: translateY(-180%); background: var(--c-panel); color: var(--c-text); border-radius: var(--r-field); }
.skip-link:focus { transform: none; }

.btn {
  display: inline-flex; justify-content: center; align-items: center; gap: 9px;
  min-height: 52px; padding: 0 24px; max-width: 100%;
  border: 1px solid var(--c-clear); border-radius: var(--r-btn);
  font-size: 16px; font-weight: var(--weight-bold); text-decoration: none;
  line-height: 1.4; transition: transform var(--motion-short) ease;
}
.btn svg { width: 18px; height: 18px; fill: none; stroke: currentColor; stroke-width: 2.2; stroke-linecap: round; stroke-linejoin: round; }
.btn-primary { background: var(--c-accent-dark); color: var(--c-panel); box-shadow: var(--sh-button); }
.btn-primary:hover, .btn-primary.is-hover { background: var(--c-accent-dark); color: var(--c-panel); }
.btn-ghost { background: var(--c-panel); color: var(--c-text); border-color: var(--c-border-strong); box-shadow: var(--sh-button-neutral); }
.btn-ghost:hover, .btn-ghost.is-hover { border-color: var(--c-text-faint); }
.btn:active, .btn.is-active { transform: translateY(2px); }
.btn:disabled, .btn[aria-disabled="true"] { cursor: not-allowed; background: var(--c-panel-2); color: var(--c-text-muted); border-color: var(--c-border); box-shadow: none; }
.btn.is-focus { outline: 2px solid var(--c-accent-dark); outline-offset: 4px; }
.card { padding: 28px; border: 1px solid var(--c-border); border-radius: var(--r-card); background: var(--c-panel); color: var(--c-text); box-shadow: var(--sh-card); }
.panel { position: relative; overflow-x: clip; padding: 40px; border: 1px solid var(--c-border); border-radius: var(--r-panel); background: var(--c-panel-2); color: var(--c-text); }
.panel-coral { background: linear-gradient(150deg,var(--c-accent-wash),var(--c-accent-wash-2)); color: var(--c-text); border-color: var(--c-accent-line); }
.panel-teal { background: linear-gradient(150deg,var(--c-success-wash),var(--c-bg)); color: var(--c-text); }

#site-header { position: relative; z-index: 40; }
.masthead {
  position: relative; width: 100%; max-width: min(100%,calc(var(--width-header-content) + var(--gutter) * 2));
  height: var(--header-height); margin-inline: auto; padding-inline: var(--gutter);
  display: flex; align-items: center; justify-content: space-between; gap: 32px;
}
.brand { display: inline-flex; align-items: center; gap: 10px; color: var(--c-text); text-decoration: none; font-family: var(--f-display); font-weight: var(--weight-display); font-size: 19px; letter-spacing: -.015em; white-space: nowrap; flex-shrink: 0; }
.brand-mark { width: 30px; height: 30px; flex: none; }
.topnav { display: flex; align-items: center; min-width: 0; margin-left: auto; }
.topnav ul { display: flex; align-items: center; list-style: none; margin: 0; padding: 0; gap: 30px; }
.topnav a { display: block; padding-block: 12px; text-decoration: none; font-size: 15px; font-weight: var(--weight-medium); white-space: nowrap; }
.topnav a:hover { color: var(--c-accent-dark); }
.topnav a[aria-current="page"] { color: var(--c-accent-dark); font-weight: var(--weight-bold); }
.header-tools { display: flex; align-items: center; gap: 12px; flex-shrink: 0; }
.language-picker { position: relative; }
.lang { min-height: 44px; padding: 6px 0 6px 30px; border: 0; border-left: 1px solid var(--c-border); background: var(--c-clear); color: var(--c-text); font-size: 15px; font-weight: var(--weight-medium); white-space: nowrap; }
.lang .chevron { margin-left: 4px; color: var(--c-text-muted); font-size: 12px; }
.lang-short { display: none; }
.language-menu { position: absolute; right: 0; top: calc(100% + 8px); width: 200px; margin: 0; padding: 8px; list-style: none; border: 1px solid var(--c-border); border-radius: var(--r-win); background: var(--c-panel); color: var(--c-text); box-shadow: var(--sh-window); z-index: 5; }
.language-menu a { display: block; min-height: 44px; padding: 10px 12px; border-radius: var(--r-field); text-decoration: none; }
.language-menu a:hover, .language-menu a[aria-current] { background: var(--c-accent-wash); color: var(--c-accent-dark); }
.menu-toggle { display: none; min-width: 44px; min-height: 44px; align-items: center; justify-content: center; border: 1px solid var(--c-border); border-radius: var(--r-field); background: var(--c-panel); color: var(--c-text); }
.menu-toggle svg { width: 20px; height: 20px; fill: none; stroke: currentColor; stroke-width: 1.8; stroke-linecap: round; }
.mobile-drawer { display: none; }
.nav-veil { position: fixed; inset: var(--header-height) 0 0; z-index: 30; background: var(--c-overlay); color: var(--c-text); }
.site-footer { margin-top: 96px; padding-top: 64px; padding-bottom: 100px; border-top: 1px solid var(--c-border); }
.footer-grid { display: grid; grid-template-columns: 1.3fr 1fr 1.2fr .8fr; gap: 44px; }
.footer-brand p { margin-top: 20px; max-width: 28em; color: var(--c-text-muted); font-size: 14px; }
.footer-heading { margin: 0 0 18px; font-size: 15px; font-weight: var(--weight-bold); }
.footer-links { list-style: none; margin: 0; padding: 0; }
.footer-links a { display: inline-block; padding-block: 7px; color: var(--c-text-muted); font-size: 14px; text-decoration: none; }
.footer-links a:hover { color: var(--c-accent-dark); text-decoration: underline; }
.footer-bottom { margin-top: 48px; padding-top: 24px; border-top: 1px solid var(--c-border); color: var(--c-text-muted); font-size: 13px; }

.hero { padding-top: 24px; overflow-x: clip; }
.hero-grid { display: grid; grid-template-columns: minmax(0,6fr) minmax(0,5fr); gap: 80px; align-items: center; }
.copy { max-width: 560px; }
.eyebrow { display: inline-flex; align-items: center; gap: 8px; min-height: 30px; padding: 4px 13px; border-radius: var(--r-pill); background: var(--c-accent-wash); color: var(--c-accent-dark); font-size: 13px; font-weight: var(--weight-semibold); }
.eyebrow::before { content: ""; width: 6px; height: 6px; flex-shrink: 0; border-radius: var(--r-circle); background: var(--c-accent); }
.copy h1 { margin-top: 22px; }
.copy h1 .title-line { display: block; }
.copy h1 mark { padding: 0 .04em; background: linear-gradient(180deg,var(--c-clear) 60%,var(--c-mark) 60%,var(--c-mark) 92%,var(--c-clear) 92%); color: inherit; }
.lede { margin: 22px 0 0; font-size: 17px; line-height: 1.78; color: var(--c-text-muted); }
.lede strong { color: var(--c-text); font-weight: var(--weight-semibold); }
.cta { display: flex; flex-wrap: wrap; gap: 14px; margin-top: 32px; }
.facts { margin-top: 38px; padding-top: 24px; border-top: 1px dashed var(--c-border-strong); display: grid; gap: 14px; }
.fact-row { display: flex; align-items: center; gap: 14px; }
.fact-key { flex: none; width: 64px; font-size: 12px; font-weight: var(--weight-semibold); color: var(--c-text-muted); letter-spacing: .04em; }
.chips { display: flex; flex-wrap: wrap; gap: 8px; margin: 0; padding: 0; list-style: none; }
.chip { display: inline-flex; align-items: center; min-height: 28px; padding: 3px 11px; max-width: 100%; border-radius: var(--r-pill); border: 1px solid var(--c-border); background: var(--c-panel); color: var(--c-text); font-family: var(--f-mono); font-size: 12px; box-shadow: var(--sh-hair); overflow-wrap: anywhere; }
.plat { display: inline-flex; align-items: center; gap: 8px; min-height: 34px; padding: 5px 13px 5px 10px; border-radius: var(--r-platform); border: 1px solid var(--c-border); background: var(--c-panel); color: var(--c-text); box-shadow: var(--sh-hair); font-size: 13.5px; font-weight: var(--weight-semibold); text-decoration: none; }
.plat svg { width: 15px; height: 15px; flex: none; }
.plat:hover { border-color: var(--c-accent-line); color: var(--c-accent-dark); }
.strip { display: flex; justify-content: center; margin-top: 32px; }
.strip-pill { display: inline-flex; align-items: center; min-height: 44px; padding: 8px; border-radius: var(--r-pill); border: 1px solid var(--c-border); background: var(--c-panel); color: var(--c-text-muted); box-shadow: var(--sh-card); font-family: var(--f-mono); font-size: 12px; }
.seg { position: relative; display: inline-flex; align-items: center; gap: 9px; padding-inline: 20px; }
.seg + .seg::before { content: ""; position: absolute; left: 0; top: 50%; width: 1px; height: 16px; margin-top: -8px; background: var(--c-border); }
.seg i { width: 7px; height: 7px; border-radius: var(--r-circle); flex-shrink: 0; }
.d-teal { background: var(--c-success); }
.d-amber { background: var(--c-warn); }
.d-coral { background: var(--c-accent); }
.seg b { color: var(--c-text); font-weight: var(--weight-semibold); }
.prose { line-height: 1.85; overflow-wrap: break-word; }
.prose h2 { margin-top: 64px; }
.prose h3 { margin-top: 36px; }
.prose p, .prose li { max-width: 100%; }
.prose a:not([class*="btn"]):not([class*="button"]) { color: var(--c-accent-dark); }
.reveal { opacity: 1; transform: none; }
.reveal-pending { opacity: 0; transform: translateY(18px); transition: opacity var(--motion-reveal) var(--ease-soft), transform var(--motion-reveal) var(--ease-soft); }
.reveal.shown { opacity: 1; transform: none; }

@media (max-width: 1400px) {
  .topnav ul { gap: 22px; }
}
@media (max-width: 1140px) {
  .topnav { display: none; }
  .header-tools { margin-left: auto; }
  .menu-toggle { display: inline-flex; }
  .lang { padding-left: 0; border-left: 0; }
  .mobile-drawer:not([hidden]) {
    position: absolute; display: block; top: var(--header-height); left: 0; right: 0;
    max-height: calc(100dvh - var(--header-height)); overflow-y: auto; overscroll-behavior: contain;
    padding: 16px var(--gutter) 28px; border-bottom: 1px solid var(--c-border);
    background: var(--c-panel); color: var(--c-text); box-shadow: var(--sh-card); z-index: 4;
  }
  .mobile-drawer ul { list-style: none; padding: 0; margin: 0; }
  .mobile-drawer a { display: flex; width: 100%; align-items: center; min-height: 46px; padding: 11px 12px; text-decoration: none; border-radius: var(--r-field); }
  .mobile-drawer a[aria-current], .mobile-drawer a:hover { background: var(--c-accent-wash); color: var(--c-accent-dark); }
  .drawer-languages { margin-top: 20px; padding-top: 16px; border-top: 1px solid var(--c-border); }
  .drawer-label { margin: 0 12px 8px; font-size: 13px; color: var(--c-text-muted); }
}
@media (max-width: 1140px) {
  :root { --gutter: 40px; --section-space: 80px; }
  .hero-grid { grid-template-columns: minmax(0,1fr); gap: 48px; }
  .copy { order: -1; max-width: 640px; }
  .strip-pill { flex-wrap: wrap; justify-content: center; row-gap: 8px; border-radius: var(--r-card); }
  .footer-grid { grid-template-columns: repeat(2,minmax(0,1fr)); }
}
@media (max-width: 768px) {
  h1, .copy h1 { font-size: clamp(24px,7vw,30px); }
}
@media (max-width: 640px) {
  :root { --gutter: 20px; --section-space: 64px; --feature-space: 72px; }
  .masthead { gap: 12px; }
  .brand { font-size: 16px; gap: 8px; }
  .brand-mark { width: 26px; height: 26px; }
  .header-tools { margin-left: auto; gap: 8px; }
  .lang-long { display: none; }
  .lang-short { display: inline; }
  .lede { font-size: 15.5px; }
  .fact-row { flex-direction: column; align-items: flex-start; gap: 8px; }
  .chips { flex-direction: row; flex-wrap: wrap; }
  .seg { padding-inline: 10px; }
  .seg + .seg::before { display: none; }
  .two-up, .footer-grid { grid-template-columns: minmax(0,1fr); }
  .card { padding: 22px; }
  .panel { padding: 24px; }
  .tilt, .phone, [data-tilt] { transform: none !important; }
  .site-footer { margin-top: 64px; }
  .footer-grid { gap: 30px; }
}
@media (max-width: 440px) {
  .btn { min-height: 48px; padding-inline: 18px; font-size: 15px; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal, .reveal-pending, .reveal.shown { opacity: 1; transform: none; transition: none; }
  .btn { transition: none; }
  .live-dot { animation: none !important; }
}