/* ---------------------------------------------------------------------------
   ScanLingo design system — light premium ("porcelain") theme.
   All effects are self-hosted CSS/JS to satisfy the strict site CSP.
--------------------------------------------------------------------------- */
:root {
  color-scheme: light;
  --bg: #fbfbfd;
  --surface: #ffffff;
  --surface-soft: #f5f5f7;
  --text: #1d1d1f;
  --text-strong: #0b1220;
  --muted: #6e6e73;
  --faint: #86868b;
  --hairline: #e8e8ed;
  --line: #d2d2d7;
  --blue: #0071e3;
  --blue-strong: #0060c9;
  --blue-soft: #eaf3fd;
  --navy: #0a1a2f;
  --teal: #0a9e93;
  --teal-soft: #e6f6f4;
  --gold: #a87b1d;
  --gold-soft: #faf3e2;
  --focus: #0b6ef3;
  --radius-xl: 28px;
  --radius-lg: 20px;
  --radius-md: 14px;
  --shadow-card: 0 1px 2px rgba(11, 18, 32, .04), 0 10px 28px rgba(11, 18, 32, .07);
  --shadow-float: 0 2px 6px rgba(11, 18, 32, .05), 0 28px 64px rgba(11, 18, 32, .14);
  --ease-spring: cubic-bezier(.22, .9, .28, 1);
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Display", "SF Pro Text", "Segoe UI", "Noto Sans", "Noto Sans CJK SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", Arial, sans-serif;
  font-size: 17px;
  line-height: 1.65;
  overflow-x: hidden;
  overflow-wrap: anywhere;
  font-feature-settings: "kern";
  -webkit-font-smoothing: antialiased;
}
a { color: var(--blue); text-underline-offset: 0.22em; text-decoration-color: color-mix(in srgb, var(--blue) 40%, transparent); }
a:hover { color: var(--blue-strong); }
:focus-visible { outline: 3px solid var(--focus); outline-offset: 3px; border-radius: 4px; }
::selection { background: color-mix(in srgb, var(--blue) 18%, transparent); }
h1, h2, h3 { color: var(--text-strong); line-height: 1.16; letter-spacing: -0.015em; text-wrap: balance; }
h1 { font-size: 3rem; font-size: clamp(2.6rem, 5vw, 4.3rem); font-weight: 740; margin: 0 0 20px; }
h2 { font-size: clamp(1.5rem, 2.6vw, 2.1rem); font-weight: 720; margin: 2.2em 0 0.65em; }
p, li { text-wrap: pretty; }
.skip-link {
  position: fixed; inset-block-start: 8px; inset-inline-start: 8px; z-index: 60;
  transform: translateY(-180%); padding: 10px 16px; border-radius: 999px;
  background: var(--surface); color: var(--text); box-shadow: var(--shadow-card); text-decoration: none;
}
.skip-link:focus { transform: translateY(0); }

/* ------------------------------- Header --------------------------------- */
.site-header {
  position: sticky; inset-block-start: 0; z-index: 40;
  background: color-mix(in srgb, var(--surface) 82%, transparent);
  -webkit-backdrop-filter: blur(20px) saturate(1.8);
  backdrop-filter: blur(20px) saturate(1.8);
  border-bottom: 1px solid transparent;
  transition: border-color 240ms ease, background-color 240ms ease, box-shadow 240ms ease;
}
.site-header.is-scrolled {
  border-bottom-color: var(--hairline);
  box-shadow: 0 10px 30px rgba(11, 18, 32, .05);
}
.header-inner, .footer-inner, .product-shell, .language-shell {
  width: min(1160px, calc(100% - 40px));
  margin-inline: auto;
}
.header-inner {
  min-height: 60px;
  display: flex; align-items: center; justify-content: space-between; gap: 20px;
}
.brand {
  display: inline-flex; align-items: center; gap: 10px;
  color: var(--text-strong); font-weight: 730; font-size: .98rem; letter-spacing: -0.01em;
  text-decoration: none; white-space: nowrap;
}
.brand img { width: 26px; height: 26px; border-radius: 7px; box-shadow: 0 2px 8px rgba(11, 18, 32, .18); transition: transform 240ms var(--ease-spring); }
.brand:hover img, .brand:focus-visible img { transform: scale(1.08) rotate(-3deg); }
.primary-nav {
  display: flex; align-items: center; flex-wrap: nowrap; gap: 2px;
  margin: 0; padding: 0; list-style: none; white-space: nowrap;
  overflow-x: auto; scrollbar-width: none;
}
.primary-nav::-webkit-scrollbar { display: none; }
.primary-nav a, .primary-nav > .language-menu > summary {
  min-height: 40px; display: inline-flex; align-items: center;
  padding: 7px 12px; border-radius: 999px;
  color: #515154; font-size: .86rem; font-weight: 530; text-decoration: none;
  transition: background-color 160ms ease, color 160ms ease;
}
.primary-nav a { flex: 0 0 auto; }
.primary-nav a:hover, .primary-nav a:focus-visible { background: var(--surface-soft); color: var(--text-strong); }
.primary-nav a[aria-current="page"] { background: color-mix(in srgb, var(--blue) 10%, transparent); color: var(--blue-strong); }
.language-menu { position: relative; flex: 0 0 auto; min-width: 0; }
.language-menu summary {
  display: inline-flex; align-items: center; min-height: 40px; padding: 7px 12px;
  border: 0; border-radius: 999px; cursor: pointer; list-style: none;
  min-width: 0; max-width: min(38vw, 220px); overflow: hidden;
  color: #515154; font-size: .86rem; font-weight: 530; text-overflow: ellipsis; white-space: nowrap;
}
.language-menu summary::-webkit-details-marker { display: none; }
.language-menu summary::after {
  content: ""; width: 6px; height: 6px; margin-inline-start: 8px; flex: 0 0 auto;
  border-inline-end: 1.5px solid currentColor; border-block-end: 1.5px solid currentColor;
  transform: rotate(45deg) translateY(-2px); transition: transform 200ms var(--ease-spring);
}
.language-menu[open] summary::after { transform: rotate(225deg) translateY(-1px); }
.language-menu summary:hover, .language-menu summary:focus-visible, .language-menu[open] summary { background: var(--surface-soft); color: var(--text-strong); }
.language-menu-panel {
  position: fixed; inset-block-start: calc(56px + env(safe-area-inset-top)); inset-inline-end: max(16px, calc((100vw - 1200px) / 2));
  z-index: 50; box-sizing: border-box;
  width: min(500px, calc(100vw - 24px)); max-inline-size: calc(100vw - 24px);
  max-height: min(70vh, 520px); overflow: auto;
  padding: 14px; border: 1px solid var(--hairline); border-radius: var(--radius-md);
  background: var(--surface); box-shadow: var(--shadow-float);
}
.language-menu-panel p { margin: 0 0 10px; color: var(--faint); font-size: .72rem; font-weight: 720; text-transform: uppercase; letter-spacing: .06em; }
.language-menu-panel ul { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 4px; padding: 0; margin: 0; list-style: none; }
.language-menu-panel li { min-width: 0; }
.language-menu-panel a {
  min-height: 40px; display: flex; align-items: center;
  min-width: 0; max-width: 100%; padding: 7px 10px; border-radius: 8px;
  color: #515154; font-size: clamp(.78rem, 1.4vw, .88rem); line-height: 1.35;
  white-space: normal; text-decoration: none; overflow-wrap: anywhere; word-break: break-word;
  transition: background-color 140ms ease, color 140ms ease;
}
.language-menu-panel a:hover, .language-menu-panel a:focus-visible, .language-menu-panel a[aria-current="page"] { background: var(--blue-soft); color: var(--blue-strong); }

/* ------------------------------- Buttons -------------------------------- */
.button {
  min-height: 44px; display: inline-flex; align-items: center; justify-content: center;
  padding: 10px 22px; border: 1px solid transparent; border-radius: 999px;
  font-size: .95rem; font-weight: 650; letter-spacing: -0.01em; text-decoration: none;
  transition: background-color 180ms ease, border-color 180ms ease, color 180ms ease, transform 180ms var(--ease-spring), box-shadow 180ms ease;
}
.button:hover { transform: translateY(-1.5px); }
.button:active { transform: translateY(0) scale(.985); }
.button-primary { background: var(--blue); color: #fff; box-shadow: 0 8px 22px color-mix(in srgb, var(--blue) 32%, transparent); }
.button-primary:hover, .button-primary:focus-visible { background: var(--blue-strong); color: #fff; box-shadow: 0 12px 28px color-mix(in srgb, var(--blue) 40%, transparent); }
/* Primary buttons always leave the site for the App Store — mark the jump. */
.button-primary::after {
  content: "↗"; margin-inline-start: 9px; font-size: .82em; line-height: 1; opacity: .82;
  transition: transform 200ms var(--ease-spring), opacity 200ms ease;
}
html[dir="rtl"] .button-primary::after { content: "↖"; }
.button-primary:hover::after, .button-primary:focus-visible::after { opacity: 1; transform: translate(2px, -2px); }
html[dir="rtl"] .button-primary:hover::after, html[dir="rtl"] .button-primary:focus-visible::after { transform: translate(-2px, -2px); }
.button-secondary { border-color: var(--line); background: color-mix(in srgb, var(--surface) 82%, transparent); color: var(--text-strong); -webkit-backdrop-filter: blur(8px); backdrop-filter: blur(8px); }
.button-secondary:hover, .button-secondary:focus-visible { border-color: var(--blue); background: var(--blue-soft); color: var(--blue-strong); }
.product-hero-actions .button, .support-hero-actions .button { min-height: 50px; padding: 13px 28px; font-size: 1rem; }
.header-download { flex: 0 0 auto; min-height: 38px; padding: 8px 18px; font-size: .84rem; white-space: nowrap; box-shadow: 0 6px 18px color-mix(in srgb, var(--blue) 24%, transparent); }

/* ---------------------------- Product layout ---------------------------- */
.product-shell { padding-block: 24px 96px; }
.public-product-shell { color: var(--text); }
.section-kicker { margin: 0 0 10px; color: var(--blue); font-size: .74rem; font-weight: 750; letter-spacing: .12em; text-transform: uppercase; }

/* Hero */
.product-hero-v2 {
  position: relative;
  display: grid; grid-template-columns: minmax(0, 1.06fr) minmax(330px, .94fr);
  gap: clamp(34px, 6vw, 88px); align-items: center;
  min-height: 600px;
  padding: clamp(36px, 5.5vw, 76px);
  overflow: hidden;
  border: 1px solid var(--hairline); border-radius: var(--radius-xl);
  background:
    radial-gradient(56% 74% at 84% 8%, color-mix(in srgb, var(--teal) 14%, transparent), transparent 62%),
    radial-gradient(48% 64% at 4% 96%, color-mix(in srgb, var(--blue) 13%, transparent), transparent 60%),
    radial-gradient(40% 50% at 62% 104%, color-mix(in srgb, var(--gold) 11%, transparent), transparent 66%),
    var(--surface);
  box-shadow: var(--shadow-card);
}
.product-hero-v2::before {
  content: ""; position: absolute; inset: 0; z-index: 0; pointer-events: none;
  background: radial-gradient(620px circle at var(--glow-x, 72%) var(--glow-y, 26%), color-mix(in srgb, var(--blue) 9%, transparent), transparent 64%);
  transition: opacity 300ms ease;
}
.product-hero-v2::after {
  content: ""; position: absolute; inset: 0; z-index: 0; pointer-events: none;
  background-image: radial-gradient(color-mix(in srgb, var(--text) 9%, transparent) 1px, transparent 1px);
  background-size: 26px 26px;
  -webkit-mask-image: radial-gradient(66% 80% at 78% 22%, #000 0%, transparent 78%);
  mask-image: radial-gradient(66% 80% at 78% 22%, #000 0%, transparent 78%);
  opacity: .5;
}
.product-hero-copy, .product-hero-media { position: relative; z-index: 1; }
.product-poster-gallery { width: min(100% - 48px, 1180px); margin: 72px auto 0; }
.poster-gallery-heading { max-width: 620px; margin-bottom: 24px; }
.poster-gallery-heading h2 { margin: 6px 0 10px; }
.poster-gallery-heading p:last-child { margin: 0; color: var(--muted); }
.poster-gallery-track { display: flex; gap: 18px; overflow-x: auto; padding: 4px 4px 22px; scroll-snap-type: x mandatory; scrollbar-width: thin; }
.poster-gallery-item { flex: 0 0 clamp(180px, 22vw, 250px); margin: 0; scroll-snap-align: start; }
.poster-gallery-item img { display: block; width: 100%; height: auto; aspect-ratio: 1284 / 2778; object-fit: cover; border: 1px solid var(--hairline); border-radius: 18px; box-shadow: 0 14px 30px rgba(11, 18, 32, .12); }
.poster-gallery-item figcaption { margin-top: 9px; color: var(--muted); font-size: .78rem; text-align: center; }
.product-hero-copy { min-width: 0; max-width: 660px; }
.product-eyebrow {
  margin: 0 0 18px; color: var(--blue); font-size: .76rem; font-weight: 760;
  letter-spacing: .14em; text-transform: uppercase;
}
.product-hero-v2 h1 {
  max-width: 16ch; margin: 0 0 22px; color: var(--text-strong);
  font-size: clamp(2.9rem, 5.4vw, 4.9rem); font-weight: 760; line-height: 1.03; letter-spacing: -0.025em;
}
.scale-letter-text { display: inline; }
.scale-letter { display: inline-block; transform-origin: 50% 85%; transition: transform 200ms var(--ease-spring), color 200ms ease; }
.scale-letter:hover { color: var(--blue); transform: translateY(-.08em) scale(1.14) rotateX(10deg); }
.scale-letter:has(+ .scale-letter:hover), .scale-letter:hover + .scale-letter { color: var(--blue); transform: translateY(-.04em) scale(1.06) rotateX(5deg); }
.product-hero-v2 h1:focus .scale-letter { color: var(--blue); transform: translateY(-.04em) scale(1.03) rotateX(8deg); transition-delay: calc(var(--letter-index) * 10ms); }
.product-hero-summary { max-width: 46ch; margin: 0; color: var(--muted); font-size: clamp(1.02rem, 1.5vw, 1.22rem); line-height: 1.6; }
.hero-search-trail { display: flex; flex-wrap: wrap; gap: 7px; align-items: center; margin: 20px 0 0; color: var(--faint); font-size: .78rem; }
.hero-search-trail span { flex-basis: 100%; margin-bottom: 2px; color: var(--blue); font-weight: 700; }
.hero-search-trail a {
  padding: 5px 11px; border: 1px solid var(--hairline); border-radius: 999px;
  background: color-mix(in srgb, var(--surface) 70%, transparent);
  color: #515154; font-size: .76rem; text-decoration: none;
  transition: border-color 160ms ease, background-color 160ms ease, color 160ms ease, transform 160ms var(--ease-spring);
}
.hero-search-trail a:hover, .hero-search-trail a:focus-visible { border-color: var(--blue); background: var(--blue-soft); color: var(--blue-strong); transform: translateY(-1px); }
.product-hero-actions, .support-hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 30px; }
.capability-tags { display: flex; flex-wrap: wrap; gap: 8px; padding: 0; margin: 28px 0 0; list-style: none; }
.capability-tags li {
  padding: 6px 11px; border: 1px solid var(--hairline); border-radius: 999px;
  background: color-mix(in srgb, var(--surface) 78%, transparent);
  color: #515154; font-size: .78rem; font-weight: 530;
  transition: border-color 180ms ease, color 180ms ease, transform 180ms var(--ease-spring);
}
.capability-tags li:hover { border-color: var(--blue); color: var(--blue-strong); transform: translateY(-1px); }
.workflow-loop { display: grid; grid-template-columns: repeat(5, minmax(0, 1fr)); gap: 10px; padding: 0; margin: 36px 0 0; list-style: none; }
.workflow-step { position: relative; display: grid; gap: 9px; color: var(--muted); font-size: .74rem; font-weight: 530; line-height: 1.35; }
.workflow-step:not(:last-child)::after {
  content: ""; position: absolute; inset-block-start: 14px; inset-inline-end: -7px;
  width: 4px; height: 4px; border-radius: 50%; background: var(--line);
}
.workflow-step-number {
  display: inline-grid; place-items: center; width: 30px; height: 30px;
  border: 1px solid var(--line); border-radius: 50%; background: var(--surface);
  color: var(--blue); font: 720 .68rem/1 ui-monospace, SFMono-Regular, Menlo, monospace;
  box-shadow: 0 2px 6px rgba(11, 18, 32, .06);
}
.product-hero-media { min-height: 440px; isolation: isolate; }
.hero-product-shot { position: absolute; inset: 50% auto auto 50%; width: 216px; margin: 0; transform: translate(-50%, -50%) rotate(4deg); z-index: 0; }
.hero-product-shot img {
  display: block; width: 100%; height: auto;
  border: 7px solid #fff; border-radius: 34px;
  box-shadow: 0 26px 52px rgba(11, 18, 32, .24), 0 0 0 1px color-mix(in srgb, var(--blue) 34%, transparent);
}
.hero-product-shot figcaption { margin-top: 12px; color: var(--faint); font-size: .72rem; text-align: center; }
.study-device {
  position: absolute; z-index: 1; display: grid; gap: 12px;
  width: min(82%, 302px); min-height: 280px; padding: 22px;
  border: 1px solid var(--hairline); border-radius: var(--radius-lg);
  background: var(--surface); box-shadow: var(--shadow-float);
}
.study-device-source { inset-block-start: 0; inset-inline-start: 0; transform: rotate(-3deg); animation: hero-float-a 7.5s ease-in-out infinite; }
.study-device-result { inset-block-end: 0; inset-inline-end: 0; min-height: 234px; background: var(--navy); color: #fff; transform: rotate(3deg); animation: hero-float-b 8.5s ease-in-out infinite; }
@keyframes hero-float-a { 0%, 100% { transform: rotate(-3deg) translateY(0); } 50% { transform: rotate(-3deg) translateY(-10px); } }
@keyframes hero-float-b { 0%, 100% { transform: rotate(3deg) translateY(0); } 50% { transform: rotate(3deg) translateY(12px); } }
.study-device-number { color: var(--faint); font: 700 .7rem/1 ui-monospace, SFMono-Regular, Menlo, monospace; }
.study-device-label { font-size: .92rem; font-weight: 720; line-height: 1.3; letter-spacing: -0.01em; }
.study-device-page { display: grid; gap: 10px; padding: 14px; border: 1px solid var(--hairline); border-radius: 10px; background: var(--surface-soft); }
.study-device-page i, .study-device-translation i { display: block; height: 6px; border-radius: 3px; background: #d8d8dd; }
.study-device-page i:nth-child(2), .study-device-page i:nth-child(5), .study-device-translation i:last-child { width: 72%; }
.study-device-selection { width: 64%; height: 24px; border: 1px solid color-mix(in srgb, var(--blue) 55%, transparent); border-radius: 6px; background: var(--blue-soft); }
.study-device-source small { color: var(--muted); font-size: .74rem; }
.study-device-result .study-device-number { color: #9fc6ee; }
.study-device-result .study-device-label { color: #fff; }
.study-device-translation { display: grid; gap: 10px; padding: 14px; border-radius: 10px; background: #16304f; }
.study-device-translation b { display: block; width: 42px; height: 6px; border-radius: 3px; background: #56d9c8; }
.study-device-translation i { background: #54718f; }
.study-device-record { align-self: end; color: #8edfff; font-size: .78rem; font-weight: 680; }

/* Feature rail */
.product-feature-section { margin-top: 72px; padding-block: 0; }
.feature-rail {
  display: flex; align-items: stretch; gap: 18px;
  overflow-x: auto; overscroll-behavior-inline: contain; scroll-snap-type: inline mandatory; scrollbar-width: none;
  padding: 12px 4px 28px; margin: 0; list-style: none; perspective: 1000px;
}
.feature-rail::-webkit-scrollbar { display: none; }
.feature-item { display: flex; flex: 0 0 clamp(320px, 46vw, 540px); min-width: 0; }
.feature-card {
  display: flex; flex: 1 1 auto; flex-direction: column; min-width: 0;
  padding: 28px 28px 30px; scroll-snap-align: start;
  border: 1px solid var(--hairline); border-top: 3px solid var(--teal); border-radius: var(--radius-lg);
  background: var(--surface); box-shadow: var(--shadow-card);
  transform: perspective(900px) rotateY(var(--card-tilt, 0deg)) translateY(0);
  transition: border-color 220ms ease, box-shadow 220ms ease, transform 220ms var(--ease-spring);
}
.feature-card:hover, .feature-card:focus-within, .feature-card[aria-current="true"] {
  border-color: color-mix(in srgb, var(--teal) 42%, var(--hairline));
  box-shadow: var(--shadow-float);
  transform: perspective(900px) rotateY(var(--card-tilt, 0deg)) translateY(-6px);
}
.feature-card-capture { border-top-color: var(--teal); }
.feature-card-objects { border-top-color: var(--blue); background: linear-gradient(180deg, var(--blue-soft), var(--surface) 58%); }
.feature-card-translate { border-top-color: var(--navy); }
.feature-card-binding { border-top-color: #c5543d; background: linear-gradient(180deg, #faf0ec, var(--surface) 58%); }
.feature-card-record { border-top-color: var(--gold); background: linear-gradient(180deg, var(--gold-soft), var(--surface) 58%); }
.feature-card-header { display: grid; grid-template-columns: 34px minmax(0, 1fr); gap: 0 14px; align-items: center; }
.feature-index { grid-row: 1; color: var(--blue); font: 720 .72rem/1 ui-monospace, SFMono-Regular, Menlo, monospace; }
.feature-card-rule { grid-row: 1; display: block; width: 46px; height: 1px; background: var(--line); }
.feature-label { grid-column: 2; display: block; margin-top: 26px; color: var(--faint); font-size: .76rem; font-weight: 720; letter-spacing: .04em; }
.feature-title { grid-column: 2; margin: 6px 0 0; color: var(--text-strong); font-size: 1.38rem; line-height: 1.26; }
.feature-card-body { flex: 1 1 auto; min-height: 0; padding: 20px 0 0 48px; overflow: visible; color: var(--muted); font-size: .95rem; }
.feature-card-body p { margin: 0 0 .85em; }
.feature-card-body p:last-child { margin-bottom: 0; }
.feature-card-body ul { padding-inline-start: 1.1em; }
.feature-progress { height: 3px; margin: 0 4px; overflow: hidden; border-radius: 2px; background: var(--hairline); }
.feature-progress span { display: block; width: 0; height: 100%; border-radius: 2px; background: var(--blue); transition: width 120ms linear; }

/* Search-intent bento */
.search-intent { margin-top: 84px; padding-top: 54px; border-top: 1px solid var(--hairline); }
.search-intent-heading { max-width: 720px; }
.search-intent-heading h2 { margin: 0; color: var(--text-strong); font-size: clamp(1.8rem, 3.4vw, 2.7rem); letter-spacing: -0.02em; }
.search-intent-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 14px; margin-top: 30px; }
.search-intent-grid article {
  padding: 26px; border: 1px solid var(--hairline); border-radius: var(--radius-lg);
  background: var(--surface); box-shadow: 0 1px 2px rgba(11, 18, 32, .03);
  transition: transform 220ms var(--ease-spring), box-shadow 220ms ease, border-color 220ms ease;
}
.search-intent-grid article:hover { transform: translateY(-4px); box-shadow: var(--shadow-card); border-color: var(--line); }
.search-intent-grid article:nth-child(2) { background: linear-gradient(180deg, var(--teal-soft), var(--surface) 82%); }
.search-intent-grid article:nth-child(3) { background: linear-gradient(180deg, var(--blue-soft), var(--surface) 82%); }
.search-intent-grid h3 { margin: 0 0 10px; color: var(--text-strong); font-size: 1.08rem; }
.search-intent-grid p { margin: 0; color: var(--muted); font-size: .93rem; }

/* Policy tabs — a deliberate dark contrast card inside the light page,
   used for the privacy-first boundary and subscription facts. */
.product-policy-tabs { margin-top: 84px; overflow: hidden; border-radius: var(--radius-xl); background: #1d1d1f; color: #f5f5f7; box-shadow: var(--shadow-float); }
.policy-tablist { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 8px; padding: 12px; border-bottom: 1px solid #3a3a3c; background: #17171a; }
.policy-tab {
  display: flex; align-items: center; justify-content: center; gap: 12px;
  min-height: 54px; padding: 12px 20px; border: 0; border-radius: 999px;
  background: transparent; color: #a1a1a6; font: inherit; font-weight: 640; text-align: start; cursor: pointer;
  transition: background-color 200ms ease, color 200ms ease, box-shadow 200ms ease;
}
.policy-tab span { color: #7dd3c7; font: 720 .7rem/1 ui-monospace, SFMono-Regular, Menlo, monospace; }
.policy-tab:hover { color: #f5f5f7; }
.policy-tab[aria-selected="true"] { background: #2c2c2e; color: #fff; box-shadow: 0 2px 12px rgba(0, 0, 0, .35); }
.policy-tab:focus-visible { outline-color: #7dd3c7; }
.policy-panels { position: relative; }
.product-policy-panel { display: block; min-width: 0; margin: 0; padding: 40px clamp(24px, 5vw, 64px) 46px; border: 0; background: #1d1d1f; }
.product-policy-panel > section { margin: 0; }
.product-policy-panel h2 { max-width: 30ch; margin: 0 0 20px; color: #fff; }
.product-policy-panel p, .product-policy-panel li, .product-policy-panel dd { max-width: 84ch; color: #c7c7cc; }
.product-policy-panel dt { color: #f5f5f7; }
.product-policy-panel ul { padding-inline-start: 1.2em; }
.product-policy-panel a { color: #7dd3c7; }
.product-policy-panel[hidden] { display: none; }
.js .product-policy-panel:not([hidden]) { animation: policy-panel-in 260ms var(--ease-spring) both; }
@keyframes policy-panel-in { from { opacity: 0; transform: translateY(10px); } to { opacity: 1; transform: translateY(0); } }
.local-first-boundary section { min-width: 0; }
.section-link { margin: 18px 0 0; text-align: end; }
.section-link a { color: #7dd3c7; font-weight: 680; text-decoration: none; }
.section-link a:hover { text-decoration: underline; }

/* Product details (legacy two-column blocks, kept for parity) */
.product-details { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 0 clamp(32px, 7vw, 104px); margin-top: 70px; }
.product-details section { min-width: 0; padding: 28px 0 38px; border-top: 1px solid var(--hairline); scroll-margin-top: 90px; }

/* FAQ */
.seo-faq { max-width: 1180px; margin: 84px auto 0; padding-top: 54px; border-top: 1px solid var(--hairline); }
.seo-faq h2 { margin: 0; }
.seo-faq > p { color: var(--muted); max-width: 70ch; }
.seo-faq dl { counter-reset: faq; display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 0 48px; margin-top: 34px; }
.faq-item { padding: 24px 0 26px; border-top: 1px solid var(--hairline); }
.seo-faq dt { display: grid; grid-template-columns: 2.4rem minmax(0, 1fr); gap: 12px; align-items: flex-start; margin: 0; color: var(--text-strong); font-size: 1.05rem; font-weight: 680; }
.seo-faq dt::before { counter-increment: faq; content: counter(faq, decimal-leading-zero); color: var(--blue); font: 720 .72rem/1.6 ui-monospace, SFMono-Regular, Menlo, monospace; }
.seo-faq dd { margin: 10px 0 0 3.4rem; max-width: 64ch; color: var(--muted); }

/* Guide discovery */
.guide-discovery { margin-top: 84px; padding-top: 54px; border-top: 1px solid var(--hairline); }
.guide-discovery h2 { margin: 0; }
.guide-discovery > p { color: var(--muted); max-width: 58ch; }
.guide-discovery ul { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 14px; padding: 0; margin: 28px 0 0; list-style: none; }
.guide-discovery li a {
  position: relative; display: block; min-height: 58px; padding: 17px 46px 17px 18px;
  border: 1px solid var(--hairline); border-radius: var(--radius-md); background: var(--surface);
  color: var(--text-strong); font-weight: 560; text-decoration: none;
  transition: transform 200ms var(--ease-spring), border-color 200ms ease, box-shadow 200ms ease;
}
.guide-discovery li a::after {
  content: "→"; position: absolute; inset-inline-end: 16px; inset-block-start: 50%;
  transform: translateY(-50%); color: var(--blue); transition: transform 200ms var(--ease-spring);
}
html[dir="rtl"] .guide-discovery li a::after { content: "←"; }
.guide-discovery li a:hover, .guide-discovery li a:focus-visible { border-color: color-mix(in srgb, var(--blue) 44%, var(--hairline)); box-shadow: var(--shadow-card); transform: translateY(-2px); }
.guide-discovery li a:hover::after { transform: translateY(-50%) translateX(4px); }
html[dir="rtl"] .guide-discovery li a:hover::after { transform: translateY(-50%) translateX(-4px); }

/* Final download CTA */
.final-cta { margin-top: 96px; }
.final-cta-card {
  position: relative; overflow: hidden;
  padding: clamp(48px, 7vw, 84px) clamp(24px, 5vw, 64px);
  border: 1px solid var(--hairline); border-radius: var(--radius-xl);
  background:
    radial-gradient(54% 88% at 16% 0%, color-mix(in srgb, var(--teal) 15%, transparent), transparent 64%),
    radial-gradient(52% 84% at 86% 12%, color-mix(in srgb, var(--blue) 16%, transparent), transparent 62%),
    radial-gradient(60% 90% at 50% 118%, color-mix(in srgb, var(--gold) 15%, transparent), transparent 68%),
    var(--surface);
  box-shadow: var(--shadow-float);
  text-align: center;
}
.final-cta-card::before {
  content: ""; position: absolute; inset: 0; pointer-events: none;
  background-image: radial-gradient(color-mix(in srgb, var(--text) 8%, transparent) 1px, transparent 1px);
  background-size: 24px 24px;
  -webkit-mask-image: radial-gradient(70% 90% at 50% 0%, #000, transparent 82%);
  mask-image: radial-gradient(70% 90% at 50% 0%, #000, transparent 82%);
  opacity: .45;
}
.final-cta-card > * { position: relative; }
.final-cta-card img { width: 96px; height: 96px; border-radius: 26px; box-shadow: 0 18px 40px rgba(11, 18, 32, .22), 0 0 0 1px var(--hairline); }
.final-cta-card .product-eyebrow { margin: 26px 0 10px; }
.final-cta-card h2 { max-width: 34ch; margin: 0 auto; font-size: clamp(1.4rem, 2.8vw, 2rem); line-height: 1.34; color: var(--text-strong); }
.final-cta-actions { display: flex; flex-wrap: wrap; justify-content: center; gap: 12px; margin-top: 32px; }

/* ------------------------------- Support -------------------------------- */
.support-shell { padding-block: 24px 92px; }
.support-workbench { width: min(1160px, calc(100% - 80px)); margin-inline: auto; color: var(--text); }
.support-hero-v2 {
  display: flex; justify-content: space-between; gap: 36px; align-items: end;
  padding: clamp(36px, 5vw, 60px) 0 40px; border-bottom: 1px solid var(--hairline);
}
.support-kicker { margin: 0 0 12px; color: var(--blue); font-size: .76rem; font-weight: 760; letter-spacing: .12em; text-transform: uppercase; }
.support-hero-v2 h1 { margin: 0 0 14px; color: var(--text-strong); font-size: clamp(2.4rem, 4.6vw, 3.9rem); letter-spacing: -0.025em; line-height: 1.06; }
.support-hero-v2 .support-summary { max-width: 58ch; color: var(--muted); font-size: 1.06rem; margin: 0; }
.support-context { max-width: 58ch; margin: 10px 0 0; color: var(--faint); font-size: .88rem; }
.support-workbench-grid { display: grid; grid-template-columns: minmax(210px, 260px) minmax(0, 1fr); gap: clamp(26px, 5vw, 64px); align-items: start; margin-top: 40px; }
.support-task-index { display: block; position: sticky; inset-block-start: 84px; width: auto; height: auto; min-width: 0; background: none; color: inherit; font: inherit; }
.support-index-kicker { margin: 0 0 14px; color: var(--faint); font-size: .74rem; font-weight: 750; text-transform: uppercase; letter-spacing: .08em; }
.support-task-index ol { display: grid; gap: 4px; padding: 0; margin: 0; list-style: none; }
.support-task-index li a {
  display: grid; grid-template-columns: 30px 1fr; gap: 10px; align-items: center;
  min-height: 42px; padding: 7px 10px; border-radius: 10px;
  color: #515154; font-size: .9rem; text-decoration: none;
  transition: background-color 160ms ease, color 160ms ease;
}
.support-task-index li a:hover, .support-task-index li a:focus-visible { background: var(--blue-soft); color: var(--blue-strong); }
.support-index-number, .support-card-index {
  display: inline-grid; place-items: center; width: 28px; height: 28px;
  border: 1px solid var(--line); border-radius: 50%; background: var(--surface);
  color: var(--blue); font: 720 .68rem/1 ui-monospace, SFMono-Regular, Menlo, monospace;
}
.support-panel { min-width: 0; }
.support-task-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 14px; padding: 0; margin: 0; list-style: none; }
.support-task-card { min-width: 0; scroll-margin-top: 90px; }
.support-task-card > details { display: flex; flex-direction: column; min-height: 290px; height: auto; padding: 24px; }
.support-task-card {
  display: flex; flex-direction: column; min-height: 290px; height: auto; padding: 24px;
  overflow: visible; border: 1px solid var(--hairline); border-radius: var(--radius-lg);
  background: var(--surface); box-shadow: 0 1px 2px rgba(11, 18, 32, .03);
  transition: border-color 200ms ease, box-shadow 200ms ease, transform 200ms var(--ease-spring);
}
.support-task-card:hover, .support-task-card:focus-within { border-color: var(--line); box-shadow: var(--shadow-card); transform: translateY(-3px); }
.support-task-body { flex: 1 1 auto; min-height: 0; overflow: visible; }
.support-task-detail { padding-top: 14px; margin-top: 14px; border-top: 1px solid var(--hairline); }
.support-task-detail:first-child { padding-top: 0; margin-top: 0; border-top: 0; }
.support-task-detail h3 { margin: 0 0 0.45em; color: var(--blue-strong); font-size: 0.92rem; }
.support-task-detail p, .support-task-detail li, .support-task-detail dd { color: var(--muted); font-size: .94rem; }
.support-task-detail ul { margin: 0; padding-inline-start: 1.1em; }
.support-task-detail dl { margin: 0; }
.support-task-detail dt { margin-top: 0.7em; font-weight: 680; color: var(--text-strong); }
.support-task-detail dt:first-child { margin-top: 0; }
.support-task-detail dd { margin-inline-start: 0; }

/* -------------------------------- Guides -------------------------------- */
.guide-shell { width: min(880px, calc(100% - 32px)); margin-inline: auto; padding-block: 52px 84px; }
.guide-article { max-width: 780px; }
.guide-kicker, .guide-updated { color: var(--faint); font-size: 0.9rem; }
.guide-kicker { margin: 0 0 14px; color: var(--blue); font-weight: 730; letter-spacing: .06em; text-transform: uppercase; font-size: .76rem; }
.guide-updated { margin: 0 0 24px; }
.guide-summary { color: var(--muted); font-size: 1.14rem; margin: 0 0 44px; max-width: 62ch; }
.guide-gallery {
  width: min(1160px, calc(100% - 32px));
  display: grid; grid-template-columns: minmax(0, 1fr) minmax(220px, 280px);
  gap: clamp(34px, 6vw, 82px); align-items: start;
}
.guide-gallery .guide-article { max-width: none; }
.guide-hero { padding: 8px 0 40px; border-top: 0; border-bottom: 1px solid var(--hairline); }
.guide-hero h1 { max-width: 18ch; margin-bottom: 16px; font-size: clamp(2.4rem, 4.4vw, 3.9rem); letter-spacing: -0.025em; }
.guide-hero .guide-summary { max-width: 60ch; margin-bottom: 0; }
.guide-article section { border-top: 1px solid var(--hairline); padding: 28px 0 8px; scroll-margin-top: 90px; }
.guide-article section h2 { margin-top: 0; }
.guide-section-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 14px; padding: 0; margin: 26px 0 0; list-style: none; }
.guide-section-card { min-width: 0; }
.guide-section-card section {
  height: 100%; padding: 24px 22px 26px; border: 1px solid var(--hairline); border-radius: var(--radius-lg);
  background: var(--surface); box-shadow: 0 1px 2px rgba(11, 18, 32, .03);
  transition: transform 200ms var(--ease-spring), border-color 200ms ease, box-shadow 200ms ease;
}
.guide-section-card section:hover, .guide-section-card section:focus-within { border-color: var(--line); box-shadow: var(--shadow-card); transform: translateY(-3px); }
.guide-section-index { display: inline-grid; place-items: center; width: 32px; height: 32px; margin-block-end: 20px; border-radius: 50%; background: var(--blue-soft); color: var(--blue); font: 720 .7rem/1 ui-monospace, SFMono-Regular, Menlo, monospace; }
.guide-section-card h2 { margin: 0 0 0.65em; font-size: 1.2rem; }
.guide-section-card p, .guide-section-card li { color: var(--muted); font-size: .94rem; }
.guide-section-card ol { margin: 0; padding-inline-start: 1.15em; }
.guide-related { max-width: none; margin-top: 8px; padding: 21px 0 0; }
.guide-related h2 { margin-top: 0; font-size: 1.25rem; }
.guide-related-grid { display: grid; gap: 10px; padding: 0; margin: 16px 0 0; list-style: none; }
.guide-related-grid li { display: grid; grid-template-columns: 30px 1fr; gap: 10px; align-items: start; margin: 0; }
.guide-related-index { display: inline-grid; place-items: center; width: 30px; height: 30px; border-radius: 50%; background: var(--teal-soft); color: var(--teal); font: 720 .68rem/1 ui-monospace, SFMono-Regular, Menlo, monospace; }
.guide-related-grid a { display: block; padding: 5px 0; color: var(--text-strong); font-weight: 560; text-decoration: none; }
.guide-related-grid a:hover { color: var(--blue); }

/* --------------------------- Legal documents ---------------------------- */
.document-shell { max-width: 760px; margin-inline: auto; padding: 64px 20px 96px; }
.legal-document { font-size: 18px; line-height: 1.75; color: #333336; }
.legal-document h1 { font-size: clamp(2rem, 4vw, 2.7rem); letter-spacing: -0.02em; margin-bottom: 24px; }
.legal-metadata {
  display: grid; gap: 3px; padding: 16px 20px; margin-block: 0 32px;
  border: 1px solid var(--hairline); border-radius: var(--radius-md);
  background: var(--surface-soft); color: var(--muted);
}
.legal-metadata p { margin: 0; font-size: .88rem; }
.legal-accuracy-notice {
  padding: 16px 20px; margin-block: 0 34px;
  border-inline-start: 3px solid var(--blue); border-radius: 10px;
  background: var(--blue-soft); color: var(--text);
}
.legal-accuracy-notice p { margin: 0; font-size: .95rem; }
.legal-document section { scroll-margin-top: 24px; margin-top: 34px; padding-top: 30px; border-top: 1px solid var(--hairline); }
.legal-document section:first-of-type { margin-top: 0; padding-top: 0; border-top: 0; }
.legal-document h2 { margin: 0 0 0.8em; font-size: 1.32rem; }
.legal-document li { margin-block: 0.45em; }
.legal-document dt { font-weight: 700; margin-block-start: 0.9em; color: var(--text-strong); }
.legal-document dt:first-child { margin-block-start: 0; }
.legal-document dd { margin-inline-start: 0; color: var(--muted); }
.legal-document ul { padding-inline-start: 1.2em; }

/* ------------------------ Language directories -------------------------- */
.language-shell { padding-block: 64px; }
.locale-directory { width: min(1040px, calc(100% - 32px)); padding-block: 64px 96px; }
.locale-directory-hero { max-width: 680px; padding-bottom: 34px; border-bottom: 1px solid var(--hairline); }
.locale-directory-kicker { margin: 0 0 12px; color: var(--blue); font-size: .76rem; font-weight: 750; letter-spacing: .12em; text-transform: uppercase; }
.locale-directory-hero h1 { margin-bottom: 12px; letter-spacing: -0.02em; }
.locale-directory-hero p:last-child { margin: 0; color: var(--muted); }
.language-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 12px; list-style: none; padding: 0; }
.locale-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 14px; margin-top: 34px; }
.locale-grid li { position: relative; min-width: 0; }
.locale-grid a {
  min-height: 96px; display: flex; flex-direction: column; align-items: flex-start; justify-content: center; gap: 4px;
  padding: 18px 18px 18px 56px; border: 1px solid var(--hairline); border-radius: var(--radius-md);
  background: var(--surface); color: var(--text-strong); text-decoration: none;
  transition: transform 200ms var(--ease-spring), border-color 200ms ease, box-shadow 200ms ease;
}
.locale-grid a:hover, .locale-grid a:focus-visible { border-color: color-mix(in srgb, var(--blue) 44%, var(--hairline)); box-shadow: var(--shadow-card); transform: translateY(-2px); }
.locale-grid strong { font-size: 1.02rem; }
.locale-grid small { color: var(--faint); font: 0.78rem/1.2 ui-monospace, SFMono-Regular, Menlo, monospace; }
.locale-index { position: absolute; inset-inline-start: 18px; inset-block-start: 18px; color: var(--blue); font: 720 0.72rem/1 ui-monospace, SFMono-Regular, Menlo, monospace; }

/* ----------------------------- App Store page --------------------------- */
.app-store-shell { display: grid; min-height: 100vh; place-items: center; padding: 28px; background: radial-gradient(58% 62% at 50% 0%, color-mix(in srgb, var(--blue) 12%, transparent), transparent 70%), radial-gradient(52% 58% at 82% 92%, color-mix(in srgb, var(--teal) 12%, transparent), transparent 72%), var(--bg); }
.language-shell:has(.app-store-shell) { width: 100%; max-width: none; margin: 0; padding-block: 0; }
.app-store-card {
  width: min(540px, 100%); padding: 56px 44px;
  border: 1px solid var(--hairline); border-radius: var(--radius-xl);
  background: color-mix(in srgb, var(--surface) 88%, transparent);
  -webkit-backdrop-filter: blur(20px); backdrop-filter: blur(20px);
  color: var(--muted); text-align: center; box-shadow: var(--shadow-float);
}
.app-store-card img { width: 144px; height: 144px; margin-bottom: 30px; border-radius: 34px; box-shadow: 0 22px 44px rgba(11, 18, 32, .2), 0 0 0 1px var(--hairline); }
.app-store-card .product-eyebrow { margin-bottom: 12px; }
.app-store-card h1 { margin: 0 0 14px; color: var(--text-strong); font-size: clamp(2rem, 5vw, 3.1rem); line-height: 1.08; letter-spacing: -0.02em; }
.app-store-card p:not(.product-eyebrow) { margin: 0 auto 30px; color: var(--muted); }
.app-store-card .button-primary { display: inline-flex; }
.app-store-back { display: block; margin-top: 24px; color: var(--blue); font-size: .9rem; font-weight: 620; }

/* -------------------------------- Footer -------------------------------- */
.site-footer { border-top: 1px solid var(--hairline); background: var(--surface); margin-top: 0; }
.footer-inner { padding-block: 44px 36px; }
.footer-inner-compact { display: flex; justify-content: space-between; gap: 24px; padding-block: 28px; }
.footer-grid { display: grid; grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr) minmax(0, 1fr); gap: 32px; align-items: start; }
.footer-brand-col { display: grid; gap: 18px; justify-items: start; }
.footer-brand { font-size: 1.02rem; }
.footer-download-button { min-height: 42px; padding: 9px 20px; font-size: .9rem; }
.footer-nav { display: flex; flex-wrap: wrap; gap: 8px 24px; align-items: center; }
.footer-nav a {
  position: relative; color: #515154; font-size: .92rem; text-decoration: none; padding: 4px 0; width: fit-content;
  transition: color 160ms ease;
}
.footer-nav a::after {
  content: ""; position: absolute; inset-inline: 0; inset-block-end: 0; height: 1px;
  background: var(--blue); transform: scaleX(0); transition: transform 220ms var(--ease-spring);
}
.footer-nav a:hover, .footer-nav a:focus-visible { color: var(--blue); }
.footer-nav a:hover::after, .footer-nav a:focus-visible::after { transform: scaleX(1); }
.footer-meta { display: grid; gap: 6px; color: var(--faint); font-size: .88rem; }
.footer-meta p { margin: 0; }
.footer-meta a { color: #515154; }
.footer-note { margin: 34px 0 0; padding-top: 20px; border-top: 1px solid var(--hairline); color: var(--faint); font-size: .8rem; }
.footer-download { color: var(--blue); font-weight: 680; }
.footer-filing { margin: 10px 0 0; color: var(--faint); font-size: .78rem; letter-spacing: .02em; }
.legal-document::after { content: "京ICP备2026057021号-1A"; display: block; margin-top: 38px; padding-top: 18px; border-top: 1px solid var(--hairline); color: var(--faint); font-size: .78rem; letter-spacing: .02em; text-align: center; }

/* --------------------------------- 404 ---------------------------------- */
.language-shell h1 { letter-spacing: -0.02em; }

/* ------------------------------ Motion utils ----------------------------- */
.reveal-ready { opacity: 0; transform: translateY(20px); }
.reveal-ready.is-revealed { opacity: 1; transform: translateY(0); transition: opacity 560ms ease, transform 560ms var(--ease-spring); }
.visually-hidden { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0, 0, 0, 0); white-space: nowrap; border: 0; }

/* ------------------------------- Responsive ------------------------------ */
@media (max-width: 960px) {
  .header-inner { justify-content: center; }
  .brand { display: none; }
  .primary-nav { width: 100%; }
  .header-download { padding: 7px 14px; font-size: .8rem; }
  .product-hero-v2 { grid-template-columns: minmax(0, 1fr) minmax(280px, .9fr); gap: 34px; padding: 40px; }
  .workflow-loop { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .workflow-step::after { display: none; }
  .feature-item { flex-basis: 72vw; }
  .support-hero-v2 { flex-direction: column; align-items: flex-start; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .footer-brand-col { grid-column: 1 / -1; }
}
@media (max-width: 760px) {
  body { font-size: 16px; }
  .header-inner, .public-product-shell, .support-workbench { width: min(100% - 24px, 780px); }
  .header-inner { min-height: 56px; align-items: center; padding-block: 8px; }
  .primary-nav { min-width: 0; }
  .primary-nav a, .primary-nav > .language-menu > summary { min-width: max-content; }
  .language-menu summary { max-width: clamp(112px, 32vw, 180px); }
  .language-menu-panel { inset-inline-start: max(12px, env(safe-area-inset-left)); inset-inline-end: max(12px, env(safe-area-inset-right)); width: auto; max-width: none; }
  .product-shell { padding-block: 14px 64px; }
  .product-hero-v2 { grid-template-columns: 1fr; min-height: 0; gap: 30px; padding: 30px 20px; border-radius: var(--radius-lg); }
  .product-hero-v2 h1 { max-width: 14ch; font-size: 2.8rem; }
  .product-hero-media { min-height: 330px; max-width: 380px; width: 100%; margin-inline: auto; }
  .hero-product-shot { width: 164px; }
  .hero-product-shot img { border-width: 5px; border-radius: 26px; }
  .study-device { width: min(84%, 276px); min-height: 226px; padding: 18px; }
  .study-device-result { min-height: 194px; }
  .capability-tags { margin-top: 22px; }
  .workflow-loop { grid-template-columns: repeat(2, minmax(0, 1fr)); margin-top: 28px; }
  .workflow-step { font-size: .68rem; }
  .product-feature-section { margin-top: 56px; }
  .feature-item { flex-basis: 88vw; }
  .feature-card { padding: 22px 20px 24px; }
  .feature-card-body { padding-inline-start: 0; }
  .search-intent { margin-top: 60px; padding-top: 40px; }
  .search-intent-grid, .support-task-grid, .guide-section-grid, .seo-faq dl, .policy-tablist { grid-template-columns: 1fr; }
  .product-policy-tabs { margin-top: 60px; border-radius: var(--radius-lg); }
  .product-policy-panel { padding: 30px 22px 34px; }
  .section-link { text-align: start; }
  .seo-faq, .guide-discovery { margin-top: 60px; padding-top: 40px; }
  .final-cta { margin-top: 64px; }
  .support-shell { padding-block: 14px 64px; }
  .support-workbench { padding-block: 0; }
  .support-hero-v2 { padding-top: 30px; }
  .support-workbench-grid { display: block; margin-top: 28px; }
  .support-task-index { position: static; overflow-x: auto; margin-inline: -4px; padding-bottom: 12px; }
  .support-task-index ol { display: flex; gap: 8px; width: max-content; }
  .support-task-index li a { min-width: max-content; border: 1px solid var(--hairline); background: var(--surface); }
  .support-index-kicker { margin-bottom: 8px; }
  .support-panel { margin-top: 18px; }
  .guide-gallery { display: block; width: min(100% - 24px, 780px); }
  .guide-related { margin-top: 44px; }
  .guide-shell { padding-block: 34px 56px; }
  .document-shell { padding-block-start: 40px; }
  .locale-directory { width: min(100% - 24px, 780px); padding-block: 40px 64px; }
  .locale-grid, .language-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; gap: 26px; }
  .footer-inner-compact { flex-direction: column; }
}
@media (max-width: 560px) {
  .language-menu-panel ul { grid-template-columns: 1fr; }
  .product-hero-actions .button { flex: 1 1 auto; }
}
@media (max-width: 400px) {
  .language-menu-panel ul { grid-template-columns: 1fr; }
  .language-menu-panel a { min-height: 38px; }
  .product-hero-v2 { padding-inline: 16px; }
  .product-hero-v2 h1 { font-size: 2.4rem; }
  .workflow-loop { row-gap: 16px; }
  .search-intent-grid article { padding: 20px; }
  .support-task-card { padding: 18px; }
}
/* Legacy template surfaces kept for layout parity with earlier releases. */
.product-hero { display: grid; grid-template-columns: minmax(0, 1.04fr) minmax(340px, 0.96fr); gap: clamp(36px, 7vw, 96px); align-items: center; min-height: 540px; }
.editorial-book { position: relative; width: min(100%, 470px); aspect-ratio: 1.05; margin-inline: auto; background: var(--surface); box-shadow: var(--shadow-card); overflow: hidden; }
.product-stage-flow { display: grid; grid-template-columns: 1fr; gap: 18px; padding: 0; margin: 72px 0 0; list-style: none; }
.toc ul { columns: 2; column-gap: 34px; list-style: none; margin: 0; padding: 0; }
@media print {
  body { background: #fff; color: #000; font-size: 11pt; }
  .site-header, .site-footer, .skip-link, .final-cta { display: none; }
  .document-shell { max-width: none; padding: 0; }
  a { color: #000; text-decoration: none; }
  h2 { break-after: avoid; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation: none !important; transition: none !important; }
  .reveal-ready { opacity: 1; transform: none; }
}