/* ==========================================================================
   00. LOCAL VARIABLE FONT (@font-face: 200..800 weights, zero FOUT jump)
   ========================================================================== */
@font-face {
  font-family: 'Plus Jakarta Sans';
  src: url('fonts/font_400.woff2') format('woff2');
  font-weight: 200 800;
  font-style: normal;
  font-display: block;
}
@font-face {
  font-family: 'Jakarta';
  src: url('fonts/font_400.woff2') format('woff2');
  font-weight: 200 800;
  font-style: normal;
  font-display: block;
}

/* ==========================================================================
   0. UNIFIED SCROLLBAR (Forces identical vertical scrollbar across ALL pages)
   ========================================================================== */
html {
  overflow-y: scroll !important;
}

:root {
  --brand-blue: #1B42A8;
  --brand-ink: #0B152D;
  --brand-wash: #E8ECF6;
  --brand-muted: #545B6C;
  --brand-hairline: rgba(11, 21, 45, 0.10);
  --brand-surface: #FFFFFF;
  --font-display: 'Plus Jakarta Sans', Jakarta, -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  --font-sans: 'Plus Jakarta Sans', Jakarta, -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  --font-mono: 'IBM Plex Mono', Consolas, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;

  --paper-bg: #FAF8F3;
  --paper-card: #FAF9F6;
  --mist-blue-card: #D5E5F5;
  --ink-primary: #121E36;
  --ink-secondary: #3D485C;
  --ink-muted: #6C778B;
  --hairline-border: rgba(20, 24, 36, 0.11);
  --pill-border: rgba(20, 24, 36, 0.28);
  --silver-stroke: #9CA3AE;
  --pastel-peach: #EAA794;
  --pastel-blue: #8AB6DF;
}

/* ==========================================================================
   BILINGUAL SWITCHER SUPPORT (Zero-layout-shift grid stack + 4 Transition Modes)
   ========================================================================== */
.bi {
  display: inline-grid !important;
  vertical-align: baseline;
}
.bi > [lang] {
  grid-area: 1 / 1 !important;
}
.site-header .nav-links .bi,
.site-header .lang-switch .bi {
  justify-items: center;
}

.mol-unit {
  display: inline-block;
}

/* Amplify molecular dispersion radius on major headlines for clearer visual drama */
.hero-headline .bi,
.about-headline .bi,
.banner-headline .bi,
.portal-headline .bi,
h1 .bi,
h2 .bi {
  --mol-scale: 1.45;
}

/* Base inactive/active state (instant on initial load to prevent FOUC) */
html:not([lang="zh-CN"]) .bi > [lang="zh-CN"],
html[lang="zh-CN"] .bi > [lang="en"] {
  opacity: 0 !important;
  visibility: hidden !important;
  pointer-events: none !important;
  user-select: none !important;
}
html:not([lang="zh-CN"]) .bi > [lang="en"],
html[lang="zh-CN"] .bi > [lang="zh-CN"] {
  opacity: 1 !important;
  visibility: visible !important;
}

/* ==========================================================================
   MODE 1 (Default): MOLECULAR DISSOCIATION & PROTEIN FOLDING (分子解离重组 ~1.3s)
   ========================================================================== */
html.lang-ready:not([data-lang-fx]) .bi > [lang],
html.lang-ready[data-lang-fx="molecular"] .bi > [lang] {
  opacity: 1 !important;
  filter: none !important;
  transform: none !important;
}
html.lang-ready:not([data-lang-fx]):not([lang="zh-CN"]) .bi > [lang="zh-CN"],
html.lang-ready:not([data-lang-fx])[lang="zh-CN"] .bi > [lang="en"],
html.lang-ready[data-lang-fx="molecular"]:not([lang="zh-CN"]) .bi > [lang="zh-CN"],
html.lang-ready[data-lang-fx="molecular"][lang="zh-CN"] .bi > [lang="en"] {
  visibility: hidden !important;
  pointer-events: none !important;
  user-select: none !important;
  transition: visibility 0s linear 1.35s !important;
}
html.lang-ready:not([data-lang-fx]):not([lang="zh-CN"]) .bi > [lang="en"],
html.lang-ready:not([data-lang-fx])[lang="zh-CN"] .bi > [lang="zh-CN"],
html.lang-ready[data-lang-fx="molecular"]:not([lang="zh-CN"]) .bi > [lang="en"],
html.lang-ready[data-lang-fx="molecular"][lang="zh-CN"] .bi > [lang="zh-CN"] {
  visibility: visible !important;
  transition: visibility 0s linear 0s !important;
}

html.lang-ready:not([data-lang-fx]) .mol-unit,
html.lang-ready[data-lang-fx="molecular"] .mol-unit {
  will-change: transform, opacity, filter;
}

html.lang-ready:not([data-lang-fx]):not([lang="zh-CN"]) .bi > [lang="zh-CN"] .mol-unit,
html.lang-ready:not([data-lang-fx])[lang="zh-CN"] .bi > [lang="en"] .mol-unit,
html.lang-ready[data-lang-fx="molecular"]:not([lang="zh-CN"]) .bi > [lang="zh-CN"] .mol-unit,
html.lang-ready[data-lang-fx="molecular"][lang="zh-CN"] .bi > [lang="en"] .mol-unit {
  opacity: 0 !important;
  filter: blur(5.5px) !important;
  transform: translate3d(
    calc(var(--mx, 0px) * var(--mol-scale, 1)),
    calc(var(--my, -12px) * var(--mol-scale, 1)),
    0
  ) rotate(var(--mrot, 10deg)) scale(0.56) !important;
  transition:
    opacity 0.54s cubic-bezier(0.4, 0, 0.2, 1) var(--mdelay-out, 0ms),
    filter 0.54s cubic-bezier(0.4, 0, 0.2, 1) var(--mdelay-out, 0ms),
    transform 0.66s cubic-bezier(0.4, 0, 0.2, 1) var(--mdelay-out, 0ms) !important;
}

html.lang-ready:not([data-lang-fx]):not([lang="zh-CN"]) .bi > [lang="en"] .mol-unit,
html.lang-ready:not([data-lang-fx])[lang="zh-CN"] .bi > [lang="zh-CN"] .mol-unit,
html.lang-ready[data-lang-fx="molecular"]:not([lang="zh-CN"]) .bi > [lang="en"] .mol-unit,
html.lang-ready[data-lang-fx="molecular"][lang="zh-CN"] .bi > [lang="zh-CN"] .mol-unit {
  opacity: 1 !important;
  filter: blur(0px) !important;
  transform: translate3d(0, 0, 0) rotate(0deg) scale(1) !important;
  transition:
    opacity 0.72s cubic-bezier(0.22, 1, 0.36, 1) calc(0.28s + var(--mdelay-in, 0ms)),
    filter 0.72s cubic-bezier(0.22, 1, 0.36, 1) calc(0.28s + var(--mdelay-in, 0ms)),
    transform 0.84s cubic-bezier(0.16, 1, 0.3, 1) calc(0.24s + var(--mdelay-in, 0ms)) !important;
}

/* ==========================================================================
   MODE 2: OPTICAL DEPTH DISSOLVE (光学微距溶解 — 慢放版 ~1.10s)
   ========================================================================== */
html.lang-ready[data-lang-fx="optical"] .bi > [lang] {
  will-change: opacity, filter, transform;
}
html.lang-ready[data-lang-fx="optical"]:not([lang="zh-CN"]) .bi > [lang="zh-CN"] {
  opacity: 0 !important;
  filter: blur(8px) !important;
  transform: translate3d(0, 7px, 0) scale(0.98) !important;
  visibility: hidden !important;
  transition:
    opacity 0.52s cubic-bezier(0.4, 0, 0.2, 1),
    filter 0.52s cubic-bezier(0.4, 0, 0.2, 1),
    transform 0.52s cubic-bezier(0.4, 0, 0.2, 1),
    visibility 0s linear 0.52s !important;
}
html.lang-ready[data-lang-fx="optical"][lang="zh-CN"] .bi > [lang="en"] {
  opacity: 0 !important;
  filter: blur(8px) !important;
  transform: translate3d(0, -7px, 0) scale(0.98) !important;
  visibility: hidden !important;
  transition:
    opacity 0.52s cubic-bezier(0.4, 0, 0.2, 1),
    filter 0.52s cubic-bezier(0.4, 0, 0.2, 1),
    transform 0.52s cubic-bezier(0.4, 0, 0.2, 1),
    visibility 0s linear 0.52s !important;
}
html.lang-ready[data-lang-fx="optical"]:not([lang="zh-CN"]) .bi > [lang="en"],
html.lang-ready[data-lang-fx="optical"][lang="zh-CN"] .bi > [lang="zh-CN"] {
  opacity: 1 !important;
  filter: blur(0px) !important;
  transform: translate3d(0, 0, 0) scale(1) !important;
  visibility: visible !important;
  transition:
    opacity 0.78s cubic-bezier(0.22, 1, 0.36, 1) 0.18s,
    filter 0.78s cubic-bezier(0.22, 1, 0.36, 1) 0.18s,
    transform 0.78s cubic-bezier(0.22, 1, 0.36, 1) 0.18s,
    visibility 0s linear 0s !important;
}

/* ==========================================================================
   MODE 3: EDITORIAL DRUM SLIDE-FADE (立体滚轴微浮 — 慢放版 ~1.05s)
   ========================================================================== */
html.lang-ready[data-lang-fx="editorial"] .bi > [lang] {
  will-change: opacity, transform;
}
html.lang-ready[data-lang-fx="editorial"]:not([lang="zh-CN"]) .bi > [lang="zh-CN"] {
  opacity: 0 !important;
  filter: none !important;
  transform: translate3d(0, 15px, 0) !important;
  visibility: hidden !important;
  transition:
    opacity 0.45s ease-out,
    transform 0.48s cubic-bezier(0.4, 0, 1, 1),
    visibility 0s linear 0.48s !important;
}
html.lang-ready[data-lang-fx="editorial"][lang="zh-CN"] .bi > [lang="en"] {
  opacity: 0 !important;
  filter: none !important;
  transform: translate3d(0, -15px, 0) !important;
  visibility: hidden !important;
  transition:
    opacity 0.45s ease-out,
    transform 0.48s cubic-bezier(0.4, 0, 1, 1),
    visibility 0s linear 0.48s !important;
}
html.lang-ready[data-lang-fx="editorial"]:not([lang="zh-CN"]) .bi > [lang="en"],
html.lang-ready[data-lang-fx="editorial"][lang="zh-CN"] .bi > [lang="zh-CN"] {
  opacity: 1 !important;
  filter: none !important;
  transform: translate3d(0, 0, 0) !important;
  visibility: visible !important;
  transition:
    opacity 0.70s cubic-bezier(0.16, 1, 0.3, 1) 0.20s,
    transform 0.74s cubic-bezier(0.16, 1, 0.3, 1) 0.20s,
    visibility 0s linear 0s !important;
}

/* ==========================================================================
   MODE 4: STAGGERED CASCADE WAVE (瀑布流错峰呼吸 — 慢放版 ~1.40s)
   ========================================================================== */
html.lang-ready[data-lang-fx="cascade"] .bi > [lang] {
  will-change: opacity, filter, transform;
}
html.lang-ready[data-lang-fx="cascade"]:not([lang="zh-CN"]) .bi > [lang="zh-CN"],
html.lang-ready[data-lang-fx="cascade"][lang="zh-CN"] .bi > [lang="en"] {
  opacity: 0 !important;
  filter: blur(6px) !important;
  transform: translate3d(0, -10px, 0) !important;
  visibility: hidden !important;
  transition:
    opacity 0.44s ease-out calc(var(--bi-delay, 0ms) * 0.65),
    filter 0.44s ease-out calc(var(--bi-delay, 0ms) * 0.65),
    transform 0.44s ease-out calc(var(--bi-delay, 0ms) * 0.65),
    visibility 0s linear calc(var(--bi-delay, 0ms) * 0.65 + 440ms) !important;
}
html.lang-ready[data-lang-fx="cascade"]:not([lang="zh-CN"]) .bi > [lang="en"],
html.lang-ready[data-lang-fx="cascade"][lang="zh-CN"] .bi > [lang="zh-CN"] {
  opacity: 1 !important;
  filter: blur(0px) !important;
  transform: translate3d(0, 0, 0) !important;
  visibility: visible !important;
  transition:
    opacity 0.76s cubic-bezier(0.22, 1, 0.36, 1) calc(var(--bi-delay, 0ms) + 140ms),
    filter 0.76s cubic-bezier(0.22, 1, 0.36, 1) calc(var(--bi-delay, 0ms) + 140ms),
    transform 0.80s cubic-bezier(0.22, 1, 0.36, 1) calc(var(--bi-delay, 0ms) + 140ms),
    visibility 0s linear calc(var(--bi-delay, 0ms) + 140ms) !important;
}

/* ==========================================================================
   1. FLOATING HEADER (Governs ALL pages)
   ========================================================================== */
.site-header-wrap {
  position: fixed !important;
  top: 24px !important;
  left: 0 !important;
  right: 0 !important;
  z-index: 80 !important;
  padding: 0 40px !important;
  pointer-events: none !important;
  box-sizing: border-box !important;
}

.site-header {
  pointer-events: auto !important;
  max-width: 1180px !important;
  width: 100% !important;
  margin: 0 auto !important;
  height: 60px !important;
  padding: 0 22px 0 28px !important;
  border-radius: 999px !important;
  background: rgba(255, 255, 255, 0.32) !important;
  backdrop-filter: blur(20px) saturate(190%) !important;
  -webkit-backdrop-filter: blur(20px) saturate(190%) !important;
  border: none !important;
  box-shadow: 0 8px 32px rgba(10, 20, 50, 0.06), 0 1px 3px rgba(10, 20, 50, 0.03) !important;
  display: flex !important;
  align-items: center !important;
  justify-content: space-between !important;
  gap: 24px !important;
  box-sizing: border-box !important;
  transition: background 0.28s ease, box-shadow 0.28s ease, backdrop-filter 0.28s ease !important;
}

.site-header .brand {
  display: inline-flex !important;
  align-items: center !important;
  gap: 10px !important;
  font-family: var(--font-display) !important;
  font-size: 19px !important;
  font-weight: 600 !important;
  letter-spacing: -0.03em !important;
  color: var(--ink-primary) !important;
  flex-shrink: 0 !important;
  text-decoration: none !important;
}

.site-header .brand img {
  height: 43.2px !important;
  width: auto !important;
  display: block !important;
}

.site-header .nav-links {
  display: flex !important;
  align-items: center !important;
  gap: 36px !important;
}

.site-header .nav-links a {
  font-family: var(--font-sans) !important;
  font-size: 14px !important;
  font-weight: 500 !important;
  color: var(--ink-primary) !important;
  opacity: 0.92 !important;
  text-decoration: none !important;
  transition: opacity 0.2s ease, color 0.2s ease !important;
}
.site-header .nav-links a [lang="zh-CN"] {
  -webkit-text-stroke: 0.22px currentColor;
}

.site-header .nav-links a:hover,
.site-header .nav-links a.active {
  opacity: 1 !important;
  font-weight: 500 !important;
}

.site-header .header-actions {
  display: flex !important;
  align-items: center !important;
  gap: 18px !important;
  flex-shrink: 0 !important;
}

/* ==========================================================================
   SINGLE-SLOT IN-PLACE LANGUAGE SWITCH (EN ⇄ 中)
   ========================================================================== */
.site-header .lang-switch {
  position: relative !important;
  display: inline-flex !important;
  align-items: center !important;
  justify-content: center !important;
  padding: 6px 4px !important;
  min-width: 26px !important;
  height: auto !important;
  border-radius: 999px !important;
  border: none !important;
  background: transparent !important;
  box-shadow: none !important;
  font-family: var(--font-sans) !important;
  font-size: 13.5px !important;
  font-weight: 500 !important;
  line-height: 1 !important;
  color: var(--ink-primary) !important;
  opacity: 0.88 !important;
  cursor: pointer !important;
  user-select: none !important;
  -webkit-tap-highlight-color: transparent !important;
  -webkit-text-stroke: 0 !important;
  outline: none !important;
  transition: opacity 0.2s ease, transform 0.18s cubic-bezier(0.22, 1, 0.36, 1) !important;
}

.site-header .lang-switch *,
.site-header .lang-switch [lang="zh-CN"],
.site-header .lang-switch [lang="en"] {
  font-family: var(--font-sans) !important;
  font-size: 13.5px !important;
  font-weight: 500 !important;
  color: var(--ink-primary) !important;
  -webkit-text-stroke: 0 !important;
}

.site-header .lang-switch:hover,
.site-header .lang-switch:focus,
.site-header .lang-switch:active {
  background: transparent !important;
  border: none !important;
  box-shadow: none !important;
  outline: none !important;
  opacity: 1 !important;
}

.site-header .lang-switch:active {
  transform: scale(0.90) !important;
}

.site-header .platform-pill {
  display: inline-flex !important;
  align-items: center !important;
  gap: 7px !important;
  padding: 8px 18px !important;
  border-radius: 999px !important;
  border: 1px solid rgba(255, 255, 255, 0.40) !important;
  background: rgba(255, 255, 255, 0.55) !important;
  box-shadow: 0 2px 8px rgba(10, 20, 50, 0.05) !important;
  font-family: var(--font-sans) !important;
  font-size: 13.5px !important;
  font-weight: 500 !important;
  color: var(--ink-primary) !important;
  text-decoration: none !important;
  transition: all 0.2s ease !important;
}

.site-header .platform-pill:hover {
  background: var(--ink-primary) !important;
  color: #FFFFFF !important;
  border-color: var(--ink-primary) !important;
  transform: translateY(-1px) !important;
  box-shadow: 0 4px 14px rgba(18, 30, 54, 0.15) !important;
}

.site-header .platform-pill svg {
  width: 12px !important;
  height: 12px !important;
  stroke: currentColor !important;
  stroke-width: 1.8 !important;
  fill: none !important;
}

@media (max-width: 980px) {
  .site-header-wrap { padding: 0 16px !important; top: 16px !important; }
  .site-header .nav-links { display: none !important; }
}

@media (max-width: 540px) {
  .site-header { padding: 0 18px 0 18px !important; gap: 12px !important; }
  .site-header .header-actions { gap: 14px !important; }
}

@media (max-width: 430px) {
  .site-header { padding: 0 18px 0 16px !important; gap: 10px !important; }
  .site-header .brand img { height: 34px !important; }
  .site-header .header-actions { gap: 12px !important; }
  .site-header .platform-pill { padding: 6px 14px !important; font-size: 13px !important; }
}

@media (orientation: landscape) and (max-height: 560px), (max-height: 500px) {
  .site-header-wrap { padding: 0 20px !important; top: 12px !important; }
  .site-header .nav-links { display: none !important; }
}

/* ==========================================================================
   2. UNIFIED SITE FOOTER + ICP FILING SYSTEM (Governs ALL pages)
   ========================================================================== */
html {
  overflow-x: clip;
}

body {
  overflow-x: clip !important;
  overflow-y: visible !important;
}

.site-footer {
  position: relative !important;
  padding: 220px 40px 52px !important;
  margin-top: -140px !important;
  text-align: center !important;
  overflow: hidden !important;
  background: transparent !important;
  box-sizing: border-box !important;
  pointer-events: none;
}

.site-footer > * {
  pointer-events: auto;
}

.site-footer .footer-inner {
  position: relative !important;
  width: 100% !important;
  max-width: 1180px !important;
  margin: 0 auto !important;
  display: flex !important;
  flex-direction: column !important;
  align-items: center !important;
  gap: 8px !important;
}

.site-footer .footer-brand {
  display: inline-flex !important;
  align-items: center !important;
  justify-content: center !important;
  text-decoration: none !important;
}

.site-footer .footer-brand img,
.site-footer .footer-brand .target-logo-svg {
  height: 36px !important;
  width: auto !important;
  overflow: visible !important;
  display: block !important;
}

.site-footer .footer-copy {
  font-family: var(--font-sans) !important;
  font-size: 12px !important;
  font-weight: 400 !important;
  line-height: 1.5 !important;
  color: var(--ink-muted) !important;
  display: flex !important;
  flex-direction: column !important;
  align-items: center !important;
  gap: 5px !important;
  margin-top: 2px !important;
}

.footer-copy-main {
  font-size: 12px !important;
  color: var(--ink-muted) !important;
  letter-spacing: 0.01em !important;
}

/* ICP Filing Block (Confirmed Direction C: Static Bottom-Right 3 Lines, Vertically Aligned with Final Logo + Copyright Lockup) */
.footer-icp,
html[data-icp-layout="corner-three"] .footer-icp {
  position: absolute !important;
  right: 0 !important;
  top: 0 !important;
  bottom: 0 !important;
  display: flex !important;
  flex-direction: column !important;
  justify-content: center !important;
  align-items: flex-end !important;
  gap: 3px !important;
  text-align: right !important;
  font-family: var(--font-sans) !important;
  font-size: 11px !important;
  font-weight: 400 !important;
  line-height: 1.45 !important;
  letter-spacing: 0.02em !important;
  color: var(--ink-muted) !important;
  margin: 0 !important;
  opacity: 1 !important;
  transform: none !important;
}

.footer-icp a {
  color: var(--ink-muted) !important;
  opacity: 0.68 !important;
  text-decoration: none !important;
  transition: opacity 0.2s ease, color 0.2s ease !important;
  display: inline-flex !important;
  align-items: center !important;
  gap: 4px !important;
}

.footer-icp a:hover {
  opacity: 1 !important;
  color: var(--ink-primary) !important;
}

.footer-icp .icp-sep {
  display: none !important;
}

.footer-icp .icp-shield {
  width: 11px !important;
  height: 11px !important;
  fill: currentColor !important;
  opacity: 0.78 !important;
  flex-shrink: 0 !important;
}

@media (max-width: 760px) {
  .footer-icp,
  html[data-icp-layout="corner-three"] .footer-icp {
    position: static !important;
    align-items: center !important;
    text-align: center !important;
    margin-top: 6px !important;
  }
}

.footer-corner-wash {
  position: absolute !important;
  bottom: -40px !important;
  width: 260px !important;
  height: 260px !important;
  border-radius: 50% !important;
  pointer-events: none !important;
  opacity: 0.55 !important;
  filter: blur(44px) !important;
  mix-blend-mode: multiply !important;
}

.footer-corner-wash.left {
  left: -40px !important;
  background: var(--pastel-peach) !important;
}

.footer-corner-wash.right {
  right: -40px !important;
  background: var(--pastel-blue) !important;
}

/* ==========================================================================
   BILINGUAL TYPOGRAPHIC & STROKE CALIBRATION SYSTEM
   ========================================================================== */
:root {
  --zh-stroke-compensation: 0.16px;
}

[lang="zh-CN"] {
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

h1 [lang="zh-CN"],
h2 [lang="zh-CN"],
h3 [lang="zh-CN"],
.hero-headline [lang="zh-CN"],
.banner-headline [lang="zh-CN"] {
  font-weight: 600;
}

.banner-lede [lang="zh-CN"],
.about-body [lang="zh-CN"],
.hero-lede [lang="zh-CN"] {
  -webkit-text-stroke: var(--zh-stroke-compensation) currentColor;
}

/* ==========================================================================
   GLOBAL BILINGUAL TYPOGRAPHY: ENGLISH WORD-SPACING & AIRINESS STANDARD
   (Release 20261027: Compensates for Plus Jakarta Sans narrow space glyphs
    and prevents negative letter-spacing from squishing inter-word spaces)
   ========================================================================== */
[lang="en"], :lang(en) {
  word-spacing: 0.04em;
}

/* Headings: Keep sleek geometric tracking while ensuring words breathe */
h1 [lang="en"], .hero-headline [lang="en"], .hero-headline .hero-title-line,
h1:lang(en), .hero-headline:lang(en),
.page-title [lang="en"], .page-title:lang(en) {
  word-spacing: 0.1em;
}

h2 [lang="en"], h3 [lang="en"],
h2:lang(en), h3:lang(en),
.section-headline [lang="en"], .about-headline [lang="en"],
.d-card h3 [lang="en"], .banner-headline [lang="en"] {
  word-spacing: 0.055em;
}

/* Body & Descriptions: Natural reading rhythm */
p [lang="en"], p:lang(en),
.company-introduction [lang="en"], .model-description [lang="en"] {
  word-spacing: 0.04em;
}
.hero-lede [lang="en"], .hero-lede:lang(en) {
  word-spacing: 0.15em;
}

/* Chinese Typography Protection: 100% immune to word-spacing */
[lang="zh-CN"], :lang(zh), :lang(zh-CN) {
  word-spacing: normal !important;
}

/* Compact navigation shares the desktop links and language state. */
.site-header .mobile-nav-toggle { display: none; }
@media (max-width: 980px), (orientation: landscape) and (max-height: 560px), (max-height: 500px) {
  body .site-header { position: relative; }
  .site-header .mobile-nav-toggle {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 4px;
    width: 36px;
    height: 40px;
    padding: 8px;
    flex-shrink: 0;
    border: 0;
    border-radius: 8px;
    background: transparent;
    color: var(--ink-primary);
    cursor: pointer;
  }
  .mobile-nav-toggle span { width: 20px; height: 2px; background: currentColor; border-radius: 2px; }
  .mobile-nav-toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(6px) rotate(45deg); }
  .mobile-nav-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
  .mobile-nav-toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-6px) rotate(-45deg); }
  .site-header.mobile-nav-open .nav-links {
    display: flex !important;
    position: absolute;
    top: calc(100% + 8px);
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: stretch !important;
    gap: 0 !important;
    margin: 0 !important;
    padding: 8px;
    border: 1px solid var(--hairline-border);
    border-radius: 16px;
    background: #faf8f3;
    box-shadow: 0 12px 32px rgb(10 20 50 / 12%);
    max-height: calc(100dvh - 100px);
    overflow-y: auto;
  }
  .site-header.mobile-nav-open .nav-links a { display: block; padding: 12px 16px; min-height: 44px; }
  .site-header .mobile-nav-toggle:focus-visible { outline: 2px solid var(--brand-blue); outline-offset: 2px; }
}
@media (max-width: 540px) {
  body .site-header { padding-left: 12px !important; padding-right: 10px !important; gap: 6px !important; }
  body .site-header .brand { flex: 0 1 140px !important; min-width: 0; }
  body .site-header .brand img { width: 100% !important; height: auto !important; }
  body .site-header .header-actions { gap: 6px !important; margin-left: auto; }
  body .site-header .platform-pill { padding: 6px 9px !important; font-size: 12px !important; white-space: nowrap; }
  body .site-header .lang-switch { min-width: 24px !important; }
}