/* =============================================================
   Meridian Special District — 一座可信的未来之城
   Design system: "Light rising over a trusted city"
   Midnight navy base · warm dawn horizon · meridian grid ·
   year-ring memory motif · civic serif display.
   Shared by /zh-cn/ and /en/. Language content stays separate.
   ============================================================= */

/* ---------- Self-hosted Latin fonts (no third-party CDN) ----------
   Latin families are served locally for speed, privacy and reliability.
   CJK families (Noto Serif/Sans SC) load async only on the /zh-cn/ page. */
@font-face { font-family: "Inter"; font-style: normal; font-weight: 400; font-display: swap; src: url("fonts/inter-latin-400-normal.woff2") format("woff2"); }
@font-face { font-family: "Inter"; font-style: normal; font-weight: 500; font-display: swap; src: url("fonts/inter-latin-500-normal.woff2") format("woff2"); }
@font-face { font-family: "Inter"; font-style: normal; font-weight: 600; font-display: swap; src: url("fonts/inter-latin-600-normal.woff2") format("woff2"); }
@font-face { font-family: "Inter"; font-style: normal; font-weight: 700; font-display: swap; src: url("fonts/inter-latin-700-normal.woff2") format("woff2"); }

@font-face { font-family: "Cormorant Garamond"; font-style: normal; font-weight: 500; font-display: swap; src: url("fonts/cormorant-garamond-latin-500-normal.woff2") format("woff2"); }
@font-face { font-family: "Cormorant Garamond"; font-style: normal; font-weight: 600; font-display: swap; src: url("fonts/cormorant-garamond-latin-600-normal.woff2") format("woff2"); }
@font-face { font-family: "Cormorant Garamond"; font-style: normal; font-weight: 700; font-display: swap; src: url("fonts/cormorant-garamond-latin-700-normal.woff2") format("woff2"); }
@font-face { font-family: "Cormorant Garamond"; font-style: italic; font-weight: 500; font-display: swap; src: url("fonts/cormorant-garamond-latin-500-italic.woff2") format("woff2"); }
@font-face { font-family: "Cormorant Garamond"; font-style: italic; font-weight: 600; font-display: swap; src: url("fonts/cormorant-garamond-latin-600-italic.woff2") format("woff2"); }

@font-face { font-family: "IBM Plex Mono"; font-style: normal; font-weight: 400; font-display: swap; src: url("fonts/ibm-plex-mono-latin-400-normal.woff2") format("woff2"); }
@font-face { font-family: "IBM Plex Mono"; font-style: normal; font-weight: 500; font-display: swap; src: url("fonts/ibm-plex-mono-latin-500-normal.woff2") format("woff2"); }
@font-face { font-family: "IBM Plex Mono"; font-style: normal; font-weight: 600; font-display: swap; src: url("fonts/ibm-plex-mono-latin-600-normal.woff2") format("woff2"); }

:root {
  /* Surfaces */
  --bg: #05080f;
  --bg-2: #070e1b;
  --bg-3: #0a1426;
  --panel: rgba(13, 21, 38, 0.62);
  --panel-2: rgba(16, 26, 46, 0.78);
  --panel-quiet: rgba(9, 15, 27, 0.55);
  --glass-line: rgba(231, 210, 150, 0.16);

  /* Lines */
  --line: rgba(168, 188, 220, 0.14);
  --line-soft: rgba(168, 188, 220, 0.09);
  --line-gold: rgba(227, 189, 99, 0.40);

  /* Accents */
  --gold: #e3bd63;
  --gold-bright: #f7e6ac;
  --gold-deep: #c69a3e;
  --cyan: #5fe3d6;
  --cyan-soft: #9af0e6;
  --warm: #ffdf9e;
  --warm-ink: #fff7e0;

  /* Ink */
  --ink: #f5f8fc;
  --muted: #c8d2e2;
  --subtle: #8a9ab2;
  --faint: #7a8aa4;

  /* System */
  --shadow: 0 30px 80px -40px rgba(0, 0, 0, 0.9);
  --shadow-soft: 0 18px 50px -34px rgba(0, 0, 0, 0.8);
  --radius: 14px;
  --radius-sm: 10px;
  --max: 1300px;
  --gutter: clamp(20px, 5vw, 64px);

  --font-cjk-serif: "Noto Serif SC", "Songti SC", "STSong", "Source Han Serif SC", serif;
  --font-cjk-sans: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
  --font-serif: "Cormorant Garamond", Georgia, "Times New Roman", serif;
  --font-sans: "Inter", system-ui, -apple-system, sans-serif;
  --font-mono: "IBM Plex Mono", "SFMono-Regular", Menlo, monospace;
}

* { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
  scroll-padding-top: 104px;
  -webkit-text-size-adjust: 100%;
  overflow-x: hidden;
}

body {
  margin: 0;
  min-width: 320px;
  color: var(--ink);
  font-family: var(--font-sans);
  font-weight: 400;
  line-height: 1.66;
  letter-spacing: 0.005em;
  background: var(--bg);
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

body.zh { font-family: var(--font-cjk-sans); line-height: 1.85; }

/* Fixed atmospheric backdrop — the city sky + faint district plan */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -2;
  background:
    radial-gradient(120% 90% at 50% -16%, #0c1730 0%, rgba(12, 23, 48, 0) 52%),
    radial-gradient(90% 60% at 84% 8%, rgba(95, 227, 214, 0.07), transparent 46%),
    linear-gradient(180deg, #05080f 0%, #070e1b 58%, #05080f 100%);
}
body::after {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(168, 188, 220, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(168, 188, 220, 0.05) 1px, transparent 1px);
  background-size: 64px 64px;
  -webkit-mask-image: radial-gradient(120% 75% at 50% 0%, rgba(0,0,0,0.6), transparent 70%);
  mask-image: radial-gradient(120% 75% at 50% 0%, rgba(0,0,0,0.6), transparent 70%);
  opacity: 0.5;
}

img { max-width: 100%; display: block; }

::selection { background: rgba(227, 189, 99, 0.28); color: #fff; }

a { color: var(--gold-bright); text-decoration: none; }
a:hover { color: var(--warm); }
/* In-prose links carry a non-color cue (WCAG 1.4.1: don't rely on colour alone) */
main p a,
footer p a,
.next-step a,
.city-verse a { text-decoration: underline; text-decoration-thickness: 1px; text-underline-offset: 3px; text-decoration-color: rgba(227, 189, 99, 0.55); }
main p a:hover,
footer p a:hover,
.next-step a:hover,
.city-verse a:hover { text-decoration-color: var(--warm); }

:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 3px;
  border-radius: 4px;
}

/* ---------- Headings ---------- */
h1, h2, h3 { font-family: var(--font-serif); font-weight: 600; line-height: 1.12; margin: 0; }
body.zh h1, body.zh h2, body.zh h3 { font-family: var(--font-cjk-serif); font-weight: 700; line-height: 1.32; letter-spacing: 0.01em; }

/* ---------- Reveal (progressive enhancement) ---------- */
.js .reveal { opacity: 0; transform: translateY(44px); transition: opacity 0.85s cubic-bezier(0.22, 0.61, 0.36, 1), transform 0.95s cubic-bezier(0.16, 0.84, 0.32, 1); will-change: opacity, transform; }
.js .reveal.in { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .js .reveal { opacity: 1 !important; transform: none !important; transition: none; }
}

/* ---------- Skip link ---------- */
.skip-link {
  position: absolute;
  left: 16px;
  top: -52px;
  z-index: 200;
  padding: 10px 18px;
  background: var(--gold);
  color: #1a1305;
  font-weight: 600;
  border-radius: 8px;
  transition: top 0.2s ease;
}
.skip-link:focus { top: 14px; }

/* =============================================================
   Header
   ============================================================= */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  border-bottom: 1px solid transparent;
  transition: background 0.3s ease, border-color 0.3s ease, backdrop-filter 0.3s ease;
}
.site-header.is-stuck {
  background: rgba(6, 10, 19, 0.82);
  backdrop-filter: blur(16px) saturate(1.2);
  -webkit-backdrop-filter: blur(16px) saturate(1.2);
  border-bottom-color: var(--line);
}
.topbar {
  max-width: var(--max);
  margin: 0 auto;
  padding: 16px var(--gutter);
  display: flex;
  align-items: center;
  gap: 28px;
}
.brand { display: flex; align-items: center; gap: 14px; color: var(--ink); flex-shrink: 0; }
.brand-logo { width: 42px; height: 42px; border-radius: 9px; object-fit: cover; box-shadow: 0 0 0 1px var(--glass-line), 0 8px 24px -12px rgba(0,0,0,0.8); }
.brand-text { display: flex; flex-direction: column; line-height: 1.2; }
.brand-name { font-family: var(--font-cjk-serif); font-weight: 700; font-size: 1.16rem; letter-spacing: 0.06em; white-space: nowrap; }
body:not(.zh) .brand-name { font-family: var(--font-serif); font-weight: 600; letter-spacing: 0.02em; }
.brand-subtitle { font-size: 0.7rem; color: var(--subtle); letter-spacing: 0.16em; text-transform: uppercase; font-family: var(--font-mono); white-space: nowrap; }
body.zh .brand-subtitle { font-family: var(--font-cjk-sans); letter-spacing: 0.24em; text-transform: none; }

.site-nav { margin-left: auto; display: flex; gap: 6px; align-items: center; }
.site-nav a {
  position: relative;
  padding: 9px 14px;
  color: var(--muted);
  font-size: 0.92rem;
  letter-spacing: 0.04em;
  border-radius: 8px;
  white-space: nowrap;
  transition: color 0.2s ease, background 0.2s ease;
}
.site-nav a::after {
  content: "";
  position: absolute;
  left: 14px; right: 14px; bottom: 5px;
  height: 1px;
  background: var(--gold);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.25s ease;
}
.site-nav a:hover { color: var(--ink); }
.site-nav a:hover::after,
.site-nav a.is-active::after { transform: scaleX(1); }
.site-nav a.is-active { color: var(--gold-bright); }

.language-link {
  margin-left: 8px;
  padding: 8px 16px;
  font-size: 0.8rem;
  letter-spacing: 0.08em;
  color: var(--ink);
  border: 1px solid var(--line-gold);
  border-radius: 999px;
  transition: background 0.2s ease, border-color 0.2s ease, color 0.2s ease;
}
.language-link:hover { background: rgba(227, 189, 99, 0.12); border-color: var(--gold); color: var(--gold-bright); }

.menu-button { display: none; flex-direction: column; gap: 5px; width: 44px; height: 40px; padding: 10px; background: transparent; border: 1px solid var(--line); border-radius: 9px; cursor: pointer; }
.menu-button span { display: block; height: 2px; background: var(--ink); border-radius: 2px; transition: transform 0.25s ease, opacity 0.25s ease; }
.menu-button[aria-expanded="true"] span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.menu-button[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.menu-button[aria-expanded="true"] span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* =============================================================
   Briefing strip (status ticker)
   ============================================================= */
.briefing-strip {
  border-bottom: 1px solid var(--line-soft);
  background: linear-gradient(90deg, rgba(227, 189, 99, 0.05), rgba(95, 227, 214, 0.04));
  overflow: hidden;
}
.briefing-track {
  display: flex;
  gap: 18px;
  align-items: center;
  max-width: var(--max);
  margin: 0 auto;
  padding: 10px var(--gutter);
  font-size: 0.78rem;
  color: var(--muted);
  white-space: nowrap;
  overflow-x: auto;
  scrollbar-width: none;
}
.briefing-track::-webkit-scrollbar { display: none; }
.briefing-track span:not(.strip-label) { color: var(--subtle); }
.briefing-track strong { color: var(--ink); font-weight: 500; }
.strip-label {
  flex: none;
  font-family: var(--font-mono);
  font-size: 0.66rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: #1a1305;
  background: var(--gold);
  padding: 3px 10px;
  border-radius: 5px;
}
body.zh .strip-label { font-family: var(--font-cjk-sans); letter-spacing: 0.16em; }

/* =============================================================
   Shared section scaffolding
   ============================================================= */
.section-band { position: relative; padding: clamp(70px, 9vw, 130px) 0; }
.section-band.alt::before {
  content: "";
  position: absolute; inset: 0;
  background: linear-gradient(180deg, rgba(10, 17, 32, 0.55), rgba(7, 12, 22, 0.2));
  border-top: 1px solid var(--line-soft);
  border-bottom: 1px solid var(--line-soft);
  z-index: -1;
}
.section-inner { max-width: var(--max); margin: 0 auto; padding: 0 var(--gutter); }

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.26em;
  text-transform: uppercase;
  color: var(--gold);
  margin-bottom: 22px;
}
body.zh .eyebrow { font-family: var(--font-cjk-sans); letter-spacing: 0.3em; text-transform: none; font-size: 0.78rem; }
.eyebrow::before { content: ""; width: 26px; height: 1px; background: linear-gradient(90deg, var(--gold), transparent); }

.section-heading {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
  gap: clamp(24px, 5vw, 70px);
  align-items: end;
  margin-bottom: clamp(40px, 5vw, 64px);
}
.section-heading h2 { font-size: clamp(1.9rem, 3.6vw, 3rem); }
body.zh .section-heading h2 { font-size: clamp(1.7rem, 3.3vw, 2.7rem); }
.section-copy { color: var(--muted); font-size: 1.02rem; margin: 0; }
.section-note {
  margin-top: clamp(28px, 4vw, 44px);
  padding: 20px 26px;
  border-left: 2px solid var(--gold);
  background: rgba(227, 189, 99, 0.05);
  color: var(--muted);
  font-size: 0.96rem;
  border-radius: 0 10px 10px 0;
}

/* Generic card depth shared by most panels */
.city-card, .definition-card, .audience-card, .boundary-panel,
.loop-card, .memory-card, .journey-card, .assurance-item,
.responsibility-card, .roadmap-card, .review-card, .faq-item,
.institutional-strip article {
  position: relative;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background:
    linear-gradient(160deg, rgba(255, 255, 255, 0.03), transparent 60%),
    var(--panel);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  transition: transform 0.4s cubic-bezier(0.22, 0.61, 0.36, 1), border-color 0.4s ease, box-shadow 0.4s ease;
}
.city-card:hover, .definition-card:hover, .audience-card:hover,
.loop-card:hover, .memory-card:hover, .journey-card:hover,
.assurance-item:hover, .responsibility-card:hover, .roadmap-card:hover,
.review-card:hover, .faq-item:hover {
  transform: translateY(-5px);
  border-color: var(--line-gold);
  box-shadow: var(--shadow-soft);
}

/* small label used widely */
.definition-card small, .audience-card small, .city-card small,
.loop-card small, .memory-card small, .journey-card small,
.assurance-item small, .responsibility-card small, .roadmap-card small,
.review-card small, .faq-item small, .boundary-panel small,
.ledger-panel small, .stack-intro small, .belief-panel small,
.institutional-strip small {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--cyan);
  margin-bottom: 12px;
}
body.zh .definition-card small, body.zh .audience-card small, body.zh .city-card small,
body.zh .loop-card small, body.zh .memory-card small, body.zh .journey-card small,
body.zh .assurance-item small, body.zh .responsibility-card small, body.zh .roadmap-card small,
body.zh .review-card small, body.zh .faq-item small, body.zh .boundary-panel small,
body.zh .ledger-panel small, body.zh .stack-intro small, body.zh .belief-panel small,
body.zh .institutional-strip small { font-family: var(--font-cjk-sans); letter-spacing: 0.16em; text-transform: none; }

/* =============================================================
   Hero — the luminous horizon
   ============================================================= */
.hero {
  position: relative;
  overflow: hidden;
  padding: clamp(70px, 11vw, 150px) 0 clamp(80px, 10vw, 140px);
}
/* warm dawn + cool sky glow */
.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background:
    radial-gradient(110% 78% at 50% 122%, rgba(227, 189, 99, 0.34), rgba(227, 189, 99, 0.07) 30%, transparent 56%),
    radial-gradient(80% 60% at 50% 118%, rgba(255, 223, 158, 0.22), transparent 52%),
    radial-gradient(70% 50% at 78% -6%, rgba(95, 227, 214, 0.12), transparent 55%);
}
/* receding meridian floor grid -> horizon */
.hero::after {
  content: "";
  position: absolute;
  left: -20%; right: -20%; bottom: 0;
  height: 60%;
  z-index: -1;
  background-image:
    linear-gradient(rgba(227, 189, 99, 0.30) 1px, transparent 1px),
    linear-gradient(90deg, rgba(227, 189, 99, 0.18) 1px, transparent 1px);
  background-size: 70px 70px;
  transform: perspective(440px) rotateX(66deg);
  transform-origin: bottom center;
  -webkit-mask-image: linear-gradient(to top, rgba(0,0,0,0.9), transparent 80%);
  mask-image: linear-gradient(to top, rgba(0,0,0,0.9), transparent 80%);
  opacity: 0.5;
}
/* Signature element: interactive rotating meridian globe (rendered in app.js, canvas 2D) */
.meridian-field {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
  pointer-events: none;
  opacity: 0;
  will-change: transform, opacity;
}
.js .meridian-field { opacity: 1; }
.hero-inner {
  position: relative;
  z-index: 2;
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 var(--gutter);
  display: grid;
  grid-template-columns: minmax(0, 1.12fr) minmax(0, 0.88fr);
  gap: clamp(36px, 5vw, 76px);
  align-items: center;
}

.notice {
  display: inline-block;
  max-width: 40ch;
  padding: 12px 18px;
  margin-bottom: 30px;
  font-size: 0.92rem;
  color: var(--muted);
  border: 1px solid var(--line);
  border-left: 2px solid var(--gold);
  border-radius: 0 10px 10px 0;
  background: rgba(13, 21, 38, 0.5);
}
.notice strong { color: var(--gold-bright); font-weight: 600; }

.hero-title {
  font-family: var(--font-cjk-serif);
  font-weight: 900;
  font-size: clamp(4rem, 12vw, 8.2rem);
  line-height: 0.98;
  letter-spacing: 0.04em;
  margin: 0 0 28px;
  background: linear-gradient(180deg, #ffffff 0%, #fdf3d6 52%, var(--gold) 130%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  text-shadow: 0 0 60px rgba(227, 189, 99, 0.16);
}
.hero-title em { font-style: normal; display: inline-block; color: var(--gold); -webkit-text-fill-color: var(--gold); }
body:not(.zh) .hero-title {
  font-family: var(--font-serif);
  font-weight: 600;
  font-size: clamp(3rem, 8.5vw, 6.4rem);
  line-height: 1.02;
  letter-spacing: 0.005em;
}
body:not(.zh) .hero-title em { font-style: italic; -webkit-text-fill-color: var(--gold); }

.hero-copy { font-size: clamp(1.05rem, 1.5vw, 1.3rem); color: var(--ink); max-width: 44ch; margin: 0 0 20px; }
.hero-soft-line { color: var(--subtle); font-size: 1rem; max-width: 46ch; margin: 0 0 32px; }

.hero-actions { display: flex; flex-wrap: wrap; gap: 14px; margin-bottom: 34px; }

.button {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 14px 26px;
  border-radius: 999px;
  border: 1px solid var(--line-gold);
  background: rgba(13, 21, 38, 0.5);
  color: var(--ink);
  font-size: 0.94rem;
  font-weight: 500;
  letter-spacing: 0.02em;
  cursor: pointer;
  transition: transform 0.25s ease, background 0.25s ease, border-color 0.25s ease, box-shadow 0.25s ease;
}
.button:hover { transform: translateY(-2px); border-color: var(--gold); color: var(--gold-bright); }
.button.primary {
  background: linear-gradient(120deg, var(--gold), var(--gold-deep));
  color: #1a1305;
  border-color: transparent;
  font-weight: 600;
  box-shadow: 0 14px 36px -16px rgba(227, 189, 99, 0.7);
}
.button.primary:hover { color: #120c02; box-shadow: 0 18px 44px -14px rgba(227, 189, 99, 0.85); }

.next-step {
  max-width: 52ch;
  padding: 18px 22px;
  border: 1px dashed var(--line-gold);
  border-radius: 12px;
  font-size: 0.9rem;
  color: var(--subtle);
  line-height: 1.7;
  background: rgba(95, 227, 214, 0.03);
}
.next-step a { font-weight: 600; }

.hero-metrics {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 14px;
  margin-top: 34px;
  padding-top: 28px;
  border-top: 1px solid var(--line);
}
.hero-metrics div { display: flex; flex-direction: column; gap: 4px; }
.hero-metrics strong {
  font-family: var(--font-serif);
  font-size: clamp(2rem, 3.4vw, 2.9rem);
  font-weight: 600;
  color: var(--gold-bright);
  line-height: 1;
}
.hero-metrics span { font-size: 0.76rem; color: var(--subtle); letter-spacing: 0.04em; }

/* Review packet — the city charter card */
.review-packet {
  position: relative;
  padding: clamp(28px, 3vw, 40px);
  border: 1px solid var(--glass-line);
  border-radius: 18px;
  background:
    linear-gradient(165deg, rgba(227, 189, 99, 0.08), transparent 55%),
    var(--panel-2);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  box-shadow: var(--shadow);
  overflow: hidden;
}
.review-packet::before {
  content: "";
  position: absolute;
  top: -40%; right: -30%;
  width: 70%; height: 80%;
  background: radial-gradient(circle, rgba(95, 227, 214, 0.12), transparent 70%);
  pointer-events: none;
}
.packet-logo { position: absolute; top: 26px; right: 26px; width: 40px; height: 40px; border-radius: 9px; opacity: 0.7; }
.packet-kicker { font-family: var(--font-mono); font-size: 0.68rem; letter-spacing: 0.24em; text-transform: uppercase; color: var(--cyan); margin-bottom: 16px; }
body.zh .packet-kicker { font-family: var(--font-cjk-sans); letter-spacing: 0.2em; text-transform: none; }
.review-packet h2 { font-size: clamp(1.15rem, 1.7vw, 1.5rem); line-height: 1.5; color: var(--ink); }
.review-packet .rule { height: 1px; margin: 22px 0; background: linear-gradient(90deg, var(--gold), transparent); }
.packet-list { display: flex; flex-direction: column; gap: 18px; }
.packet-item { display: grid; grid-template-columns: auto 1fr; gap: 16px; align-items: start; }
.item-index { font-family: var(--font-mono); font-size: 0.8rem; color: var(--gold); padding-top: 2px; }
.packet-item small { display: block; font-family: var(--font-mono); font-size: 0.64rem; letter-spacing: 0.18em; text-transform: uppercase; color: var(--faint); margin-bottom: 4px; }
body.zh .packet-item small { font-family: var(--font-cjk-sans); letter-spacing: 0.16em; text-transform: none; color: var(--cyan); }
.packet-item strong { display: block; color: var(--ink); font-weight: 600; font-size: 0.96rem; margin-bottom: 4px; }
.packet-item p { margin: 0; font-size: 0.85rem; color: var(--subtle); line-height: 1.6; }

/* =============================================================
   City narrative section
   ============================================================= */
.city-layout { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: clamp(36px, 5vw, 72px); align-items: start; }
.city-narrative h2 { font-size: clamp(2rem, 4vw, 3.3rem); margin-bottom: 24px; }
.city-narrative p { color: var(--muted); margin: 0 0 18px; }
.city-verse {
  margin-top: 28px;
  padding: 24px 28px;
  font-family: var(--font-cjk-serif);
  font-size: 1.12rem;
  line-height: 1.9;
  color: var(--warm-ink);
  border: 1px solid var(--line-gold);
  border-radius: 14px;
  background: linear-gradient(135deg, rgba(227, 189, 99, 0.08), transparent);
}
body:not(.zh) .city-verse { font-family: var(--font-serif); font-style: italic; font-size: 1.3rem; }

.city-card-grid { display: flex; flex-direction: column; gap: 18px; }
.city-card { padding: 26px 28px; }
.city-card h3 { font-size: 1.2rem; margin-bottom: 10px; color: var(--ink); }
.city-card p { margin: 0; color: var(--muted); font-size: 0.95rem; }

.belief-panel {
  margin-top: clamp(40px, 5vw, 64px);
  text-align: center;
  max-width: 880px;
}
.belief-panel small {
  justify-content: center;
  text-align: center;
  color: var(--gold);
  margin-bottom: 16px;
}
.belief-panel p {
  font-family: var(--font-cjk-serif);
  font-size: clamp(1.3rem, 2.4vw, 1.9rem);
  line-height: 1.7;
  color: var(--ink);
  margin: 0;
}
body:not(.zh) .belief-panel p { font-family: var(--font-serif); font-style: italic; }

/* =============================================================
   Model / definitions
   ============================================================= */
.warm-prose { max-width: 78ch; margin: 0 0 clamp(34px, 4vw, 52px); }
.warm-prose p { color: var(--muted); font-size: 1.02rem; margin: 0 0 14px; }

.definition-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; }
.definition-card { padding: 28px 24px; display: flex; flex-direction: column; }
.definition-card h3 { font-size: 1.3rem; margin-bottom: 12px; color: var(--ink); }
.definition-card p { margin: 0 0 16px; color: var(--muted); font-size: 0.93rem; flex: 1; }
.not {
  font-size: 0.82rem;
  color: var(--subtle);
  padding: 10px 12px;
  border-radius: 8px;
  background: rgba(255, 120, 120, 0.06);
  border: 1px solid rgba(255, 140, 140, 0.16);
}
.not::before { content: "\2715  "; color: #ff9b9b; font-weight: 700; }

.stack-intro { max-width: 70ch; margin: clamp(44px, 5vw, 64px) 0 26px; }
.stack-intro p { margin: 0; color: var(--muted); font-size: 1rem; }

.institutional-strip { display: grid; grid-template-columns: repeat(5, 1fr); gap: 14px; }
.institutional-strip article { padding: 22px 18px; }
.institutional-strip strong { display: block; color: var(--ink); font-weight: 500; font-size: 0.92rem; line-height: 1.5; }

/* =============================================================
   Audience grid
   ============================================================= */
.audience-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.audience-card { padding: 28px 26px; }
.audience-card h3 { font-size: 1.18rem; margin-bottom: 12px; color: var(--ink); }
.audience-card p { margin: 0; color: var(--muted); font-size: 0.94rem; }

/* =============================================================
   Boundaries
   ============================================================= */
.boundary-layout { display: grid; grid-template-columns: 1fr 1fr; gap: 22px; }
.boundary-panel { padding: 30px 30px; }
.boundary-panel h3 { font-size: 1.35rem; margin-bottom: 18px; color: var(--ink); }
.boundary-panel ul { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 13px; }
.boundary-panel li { position: relative; padding-left: 26px; color: var(--muted); font-size: 0.95rem; }
.boundary-panel li::before { content: ""; position: absolute; left: 4px; top: 9px; width: 8px; height: 8px; border-radius: 2px; transform: rotate(45deg); }
.boundary-panel:first-child li::before { background: var(--cyan); box-shadow: 0 0 10px rgba(95, 227, 214, 0.5); }
.boundary-panel:last-child li::before { background: #ff9b9b; box-shadow: 0 0 10px rgba(255, 130, 130, 0.4); }

/* =============================================================
   Operations loop
   ============================================================= */
.loop-grid { display: grid; grid-template-columns: repeat(5, 1fr); gap: 14px; }
.loop-card { padding: 24px 20px; }
.loop-card small { font-family: var(--font-mono); font-size: 1rem; color: var(--gold); letter-spacing: 0; }
.loop-card h3 { font-size: 1.06rem; margin: 8px 0 10px; color: var(--ink); }
.loop-card p { margin: 0; font-size: 0.86rem; color: var(--muted); }

.ledger-panel {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
  margin-top: 22px;
  padding: 28px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: linear-gradient(135deg, rgba(95, 227, 214, 0.05), transparent 60%), var(--panel-quiet);
}
.ledger-panel p { margin: 0; color: var(--muted); font-size: 0.95rem; }

/* =============================================================
   Memory section — the year-ring motif
   ============================================================= */
.memory-section { overflow: hidden; }
.memory-section::before {
  content: "";
  position: absolute;
  top: 50%; right: -10%;
  width: 720px; height: 720px;
  transform: translateY(-50%);
  z-index: -1;
  background: repeating-radial-gradient(circle at center, transparent 0 38px, rgba(227, 189, 99, 0.10) 38px 39px);
  -webkit-mask-image: radial-gradient(circle at center, black, transparent 68%);
  mask-image: radial-gradient(circle at center, black, transparent 68%);
  opacity: 0.7;
}
.memory-layout { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
.memory-card { padding: 26px 22px; }
.memory-card small { color: var(--gold); font-family: var(--font-mono); font-size: 0.95rem; letter-spacing: 0; }
.memory-card h3 { font-size: 1.1rem; margin: 8px 0 10px; color: var(--ink); }
.memory-card p { margin: 0; font-size: 0.88rem; color: var(--muted); }

.memory-spine {
  margin-top: clamp(38px, 4vw, 56px);
  text-align: center;
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.memory-spine strong {
  font-family: var(--font-cjk-serif);
  font-weight: 700;
  font-size: clamp(1.3rem, 2.5vw, 2rem);
  line-height: 1.6;
  color: var(--gold-bright);
}
.memory-spine span { color: var(--muted); font-size: 1.05rem; }
body:not(.zh) .memory-spine strong { font-family: var(--font-serif); font-style: italic; }

/* =============================================================
   Identity / system layout
   ============================================================= */
.system-layout { display: grid; grid-template-columns: minmax(0, 0.95fr) minmax(0, 1.05fr); gap: clamp(34px, 5vw, 64px); align-items: center; margin-bottom: clamp(40px, 5vw, 60px); }
.system-layout h2 { font-size: clamp(1.9rem, 3.4vw, 2.8rem); margin-bottom: 20px; }
.system-visual {
  margin: 0;
  padding: 18px;
  border: 1px solid var(--glass-line);
  border-radius: 16px;
  background: linear-gradient(160deg, rgba(95, 227, 214, 0.06), transparent 60%), var(--panel-quiet);
  box-shadow: var(--shadow);
}
.system-visual img { border-radius: 10px; }

.journey-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 22px; }
.journey-card { padding: 32px 32px; }
.journey-card h3 { font-size: 1.4rem; margin-bottom: 18px; color: var(--ink); }
.journey-card ol { margin: 0; padding: 0; list-style: none; counter-reset: step; display: flex; flex-direction: column; gap: 14px; }
.journey-card li { position: relative; padding-left: 40px; color: var(--muted); font-size: 0.96rem; counter-increment: step; }
.journey-card li::before {
  content: counter(step);
  position: absolute; left: 0; top: -1px;
  width: 26px; height: 26px;
  display: grid; place-items: center;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--gold-bright);
  border: 1px solid var(--line-gold);
  border-radius: 50%;
  background: rgba(227, 189, 99, 0.06);
}

/* =============================================================
   Assurance
   ============================================================= */
.assurance-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.assurance-item { padding: 30px 28px; }
.assurance-item h3 { font-size: 1.25rem; margin-bottom: 12px; color: var(--ink); }
.assurance-item p { margin: 0; color: var(--muted); font-size: 0.95rem; }

.responsibility-grid { display: grid; grid-template-columns: repeat(5, 1fr); gap: 14px; margin-top: 26px; }
.responsibility-card { padding: 22px 18px; }
.responsibility-card h3 { font-size: 1.05rem; margin: 6px 0 8px; color: var(--ink); }
.responsibility-card p { margin: 0; font-size: 0.84rem; color: var(--muted); }

/* =============================================================
   Pilot roadmap
   ============================================================= */
.roadmap { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; position: relative; }
.roadmap::before {
  content: "";
  position: absolute;
  top: 38px; left: 6%; right: 6%;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--line-gold) 14%, var(--line-gold) 86%, transparent);
  z-index: 0;
}
.roadmap-card { padding: 30px 26px; position: relative; }
.roadmap-card::before {
  content: "";
  position: absolute;
  top: -7px; left: 28px;
  width: 12px; height: 12px;
  border-radius: 50%;
  background: var(--gold);
  box-shadow: 0 0 0 4px rgba(227, 189, 99, 0.18), 0 0 14px rgba(227, 189, 99, 0.6);
}
.roadmap-card h3 { font-size: 1.2rem; margin: 14px 0 12px; color: var(--ink); }
.roadmap-card p { margin: 0; color: var(--muted); font-size: 0.92rem; }

/* =============================================================
   Review materials
   ============================================================= */
.review-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.review-card { padding: 28px 26px; }
.review-card small { color: var(--gold); font-family: var(--font-mono); font-size: 0.95rem; letter-spacing: 0; }
.review-card h3 { font-size: 1.16rem; margin: 8px 0 12px; color: var(--ink); }
.review-card p { margin: 0; color: var(--muted); font-size: 0.92rem; }

/* =============================================================
   FAQ
   ============================================================= */
.faq-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 18px; }
.faq-item { padding: 26px 28px; }
.faq-item h3 { font-size: 1.15rem; margin: 6px 0 12px; color: var(--ink); }
.faq-item p { margin: 0; color: var(--muted); font-size: 0.94rem; }

/* =============================================================
   Closing CTA
   ============================================================= */
.closing-cta {
  position: relative;
  overflow: hidden;
  padding: clamp(80px, 10vw, 150px) 0;
}
.closing-cta::before {
  content: "";
  position: absolute; inset: 0; z-index: -1;
  background:
    radial-gradient(90% 120% at 50% 130%, rgba(227, 189, 99, 0.22), transparent 55%),
    radial-gradient(60% 90% at 50% -20%, rgba(95, 227, 214, 0.1), transparent 60%);
  border-top: 1px solid var(--line-soft);
}
.closing-layout { display: grid; grid-template-columns: minmax(0, 1.2fr) minmax(0, 0.8fr); gap: clamp(30px, 5vw, 64px); align-items: center; }
.closing-cta h2 { font-size: clamp(2.2rem, 4.6vw, 3.6rem); margin-bottom: 22px; }
.closing-cta p { color: var(--muted); font-size: 1.08rem; margin: 0; max-width: 54ch; }
.closing-actions { display: flex; flex-direction: column; gap: 14px; align-items: flex-start; }
.closing-actions .button { width: 100%; justify-content: center; }

/* =============================================================
   Footer
   ============================================================= */
.site-footer {
  position: relative;
  overflow: hidden;
  border-top: 1px solid var(--glass-line);
  background:
    radial-gradient(120% 150% at 50% 0%, rgba(227, 189, 99, 0.05), transparent 60%),
    rgba(5, 8, 15, 0.78);
}
.site-footer::before {                 /* top accent line — echoes the section dividers */
  content: "";
  position: absolute; top: 0; left: 50%; transform: translateX(-50%);
  width: min(520px, 70%); height: 1px;
  background: linear-gradient(90deg, transparent, rgba(227, 189, 99, 0.55), rgba(95, 227, 214, 0.4), transparent);
}
.site-footer::after {                  /* faint seal watermark */
  content: "";
  position: absolute; left: 50%; top: 50%; transform: translate(-50%, -50%);
  width: 168px; height: 168px;
  background: url("meridian-seal.svg") center / contain no-repeat;
  opacity: 0.045;
  pointer-events: none;
}
.footer-inner {
  position: relative;
  z-index: 1;
  max-width: var(--max);
  margin: 0 auto;
  padding: 46px var(--gutter);
  display: flex;
  flex-wrap: wrap;
  gap: 14px 28px;
  justify-content: space-between;
  align-items: center;
  color: var(--subtle);
  font-size: 0.86rem;
}
.footer-inner span:first-child { color: var(--ink); font-family: var(--font-cjk-serif); letter-spacing: 0.06em; font-size: 1.04rem; }
body:not(.zh) .footer-inner span:first-child { font-family: var(--font-serif); }
.footer-inner span:last-child { font-family: var(--font-mono); font-size: 0.72rem; letter-spacing: 0.18em; text-transform: uppercase; color: var(--subtle); }
body.zh .footer-inner span:last-child { font-family: var(--font-cjk-sans); letter-spacing: 0.12em; text-transform: none; font-size: 0.78rem; }

/* Bureau attribution — restrained "powered by FCB" lockup */
.footer-bureau {
  position: relative;
  z-index: 1;
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 var(--gutter) 46px;
}
.footer-bureau::before {
  content: "";
  display: block;
  width: 100%;
  height: 1px;
  margin-bottom: 26px;
  background: linear-gradient(90deg, transparent, var(--glass-line) 18%, var(--glass-line) 82%, transparent);
}
.footer-bureau__lockup {
  margin: 0 0 8px;
  font-family: var(--font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--subtle);
}
.footer-bureau__lockup strong {
  color: rgba(227, 189, 99, 0.92);
  font-weight: 600;
  letter-spacing: 0.1em;
}
.footer-bureau__note {
  margin: 0;
  max-width: 60ch;
  font-size: 0.8rem;
  line-height: 1.7;
  color: var(--subtle);
}
body.zh .footer-bureau__lockup { font-family: var(--font-cjk-sans); letter-spacing: 0.12em; text-transform: none; font-size: 0.8rem; }
body.zh .footer-bureau__note { font-family: var(--font-cjk-sans); }

/* =============================================================
   Responsive
   ============================================================= */
@media (max-width: 1080px) {
  .definition-grid, .institutional-strip, .loop-grid, .memory-layout, .responsibility-grid { grid-template-columns: repeat(2, 1fr); }
  .roadmap { grid-template-columns: repeat(2, 1fr); }
  .roadmap::before { display: none; }
  .audience-grid, .assurance-grid, .review-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 920px) {
  .hero-inner, .city-layout, .system-layout, .closing-layout, .section-heading { grid-template-columns: 1fr; }
  .hero-inner { gap: 44px; }
  .section-heading { gap: 16px; align-items: start; }
  .review-packet { order: 2; }

  .site-nav {
    position: fixed;
    inset: 0 0 0 auto;
    width: min(320px, 84vw);
    flex-direction: column;
    align-items: stretch;
    gap: 6px;
    padding: 100px 24px 40px;
    margin: 0;
    background: rgba(7, 12, 22, 0.97);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-left: 1px solid var(--line);
    transform: translateX(105%);
    transition: transform 0.32s cubic-bezier(0.22, 0.61, 0.36, 1);
    overflow-y: auto;
  }
  .site-nav[data-open] { transform: translateX(0); }
  .site-nav a { padding: 13px 16px; font-size: 1.05rem; }
  .site-nav a::after { display: none; }
  .menu-button { display: flex; margin-left: auto; }
  .language-link { display: none; }
}

@media (max-width: 720px) {
  .definition-grid, .institutional-strip, .loop-grid, .memory-layout,
  .responsibility-grid, .roadmap, .audience-grid, .assurance-grid,
  .review-grid, .faq-grid, .boundary-layout, .ledger-panel, .journey-grid { grid-template-columns: 1fr; }
  .hero-metrics { grid-template-columns: repeat(2, 1fr); gap: 20px 14px; }
  .closing-actions { width: 100%; }
}

@media (max-width: 420px) {
  :root { --gutter: 18px; }
  .hero-title { font-size: clamp(3.2rem, 18vw, 4.6rem); }
}

/* =============================================================
   Interaction polish: scroll progress, back-to-top, card accent
   ============================================================= */
.scroll-progress {
  position: fixed;
  top: 0; left: 0;
  height: 3px; width: 0;
  z-index: 200;
  background: linear-gradient(90deg, var(--gold-deep), var(--gold), var(--cyan));
  box-shadow: 0 0 12px rgba(227, 189, 99, 0.5);
}

.to-top {
  position: fixed;
  right: clamp(16px, 3vw, 28px);
  bottom: clamp(16px, 3vw, 28px);
  z-index: 150;
  width: 46px; height: 46px;
  display: grid; place-items: center;
  border-radius: 50%;
  border: 1px solid var(--line-gold);
  background: rgba(13, 21, 38, 0.72);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  color: var(--gold-bright);
  font-size: 1.15rem;
  line-height: 1;
  cursor: pointer;
  opacity: 0;
  transform: translateY(12px);
  pointer-events: none;
  transition: opacity 0.3s ease, transform 0.3s ease, background 0.2s ease, border-color 0.2s ease;
}
.to-top.show { opacity: 1; transform: none; pointer-events: auto; }
.to-top:hover { background: rgba(227, 189, 99, 0.16); border-color: var(--gold); transform: translateY(-3px); }

/* Card top-accent line on hover */
.definition-card, .audience-card, .loop-card, .memory-card,
.assurance-item, .review-card, .faq-item, .city-card { overflow: hidden; }
.definition-card::after, .audience-card::after, .loop-card::after, .memory-card::after,
.assurance-item::after, .review-card::after, .faq-item::after, .city-card::after {
  content: "";
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--gold), var(--cyan));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.4s cubic-bezier(0.22, 0.61, 0.36, 1);
}
.definition-card:hover::after, .audience-card:hover::after, .loop-card:hover::after, .memory-card:hover::after,
.assurance-item:hover::after, .review-card:hover::after, .faq-item:hover::after, .city-card:hover::after { transform: scaleX(1); }

@media (prefers-reduced-motion: reduce) {
  .scroll-progress { display: none; }
  .to-top { transition: none; }
}

/* =============================================================
   Signature motion — "a future city waking up"
   GPU-friendly (opacity / transform / background-position only),
   gated on .js, disabled under prefers-reduced-motion.
   ============================================================= */

/* 1. Hero entrance choreography — staggered fade-up */
.js .hero .notice { transition-delay: 0.05s; }
.js .hero .hero-title { transition-delay: 0.16s; }
.js .hero .hero-copy { transition-delay: 0.30s; }
.js .hero .hero-soft-line { transition-delay: 0.40s; }
.js .hero .hero-actions { transition-delay: 0.50s; }
.js .hero .next-step { transition-delay: 0.60s; }
.js .hero .hero-metrics { transition-delay: 0.68s; }
.js .hero .review-packet { transition-delay: 0.34s; }

/* 1b. Continuous dawn light sweeping across the wordmark (always visible) */
.js .hero-title {
  background: linear-gradient(105deg, var(--gold-deep) 0%, var(--gold) 30%, #fff7df 46%, #ffffff 50%, #fff7df 54%, var(--gold) 70%, var(--gold-deep) 100%);
  background-size: 280% 100%;
  background-position: 100% 0;
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  animation: heroShimmer 6.5s cubic-bezier(0.45, 0, 0.2, 1) 0.6s infinite;
}
@keyframes heroShimmer {
  0%   { background-position: 100% 0; }
  55%  { background-position: 0% 0; }
  100% { background-position: 0% 0; }
}

/* 2. Living horizon — breathing glow + slowly drifting meridian grid */
.js .hero::before {
  transform: translate3d(0, var(--hy, 0px), 0);
  animation: horizonBreathe 8s ease-in-out 0.8s infinite;
  will-change: opacity, transform;
}
@keyframes horizonBreathe { 0%, 100% { opacity: 0.6; } 50% { opacity: 1; } }
.js .hero::after { animation: gridDrift 16s linear infinite; will-change: background-position; }
@keyframes gridDrift { from { background-position: 0 0, 0 0; } to { background-position: 0 90px, 0 0; } }

/* 4. Year-ring waking — slow expand/contract of the memory rings */
.js .memory-section::before { animation: ringPulse 11s ease-in-out infinite; }
@keyframes ringPulse {
  0%, 100% { transform: translateY(-50%) scale(0.96); opacity: 0.4; }
  50% { transform: translateY(-50%) scale(1.12); opacity: 1; }
}

/* 5. Primary CTA — warm glow on hover */
.button.primary { position: relative; }
.button.primary::after {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
  opacity: 0;
  box-shadow: 0 0 0 0 rgba(227, 189, 99, 0.0);
  transition: opacity 0.5s ease, box-shadow 0.5s ease;
  pointer-events: none;
}
.button.primary:hover::after { opacity: 1; box-shadow: 0 0 30px 4px rgba(227, 189, 99, 0.35); }

@media (prefers-reduced-motion: reduce) {
  .js .hero-title,
  .js .hero::before,
  .js .hero::after,
  .js .memory-section::before { animation: none; }
  .js .hero::before { transform: none; }
}

/* =============================================================
   Site rhythm system — chaptered structure to match the hero
   ============================================================= */

/* 1. Auto chapter numbers (01..14) as a faint watermark per band */
main { counter-reset: chapter; }
.section-band { counter-increment: chapter; }
.section-band > .section-inner { position: relative; }
.section-band > .section-inner::before {
  content: counter(chapter, decimal-leading-zero);
  position: absolute;
  top: -0.12em;
  right: 0;
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: clamp(3rem, 7vw, 6.4rem);
  line-height: 1;
  letter-spacing: -0.02em;
  color: rgba(227, 189, 99, 0.07);
  pointer-events: none;
  z-index: 0;
}
body.zh .section-band > .section-inner::before { font-family: var(--font-mono); }

/* 2. Section-heading divider with a gold accent that draws in on reveal */
.section-heading {
  position: relative;
  padding-bottom: clamp(22px, 3vw, 32px);
  border-bottom: 1px solid var(--line-soft);
}
.section-heading > div, .section-heading > .section-copy { position: relative; z-index: 1; }
.section-heading::after {
  content: "";
  position: absolute;
  left: 0; bottom: -1px;
  width: 64px; height: 2px;
  background: linear-gradient(90deg, var(--gold), rgba(227, 189, 99, 0));
  transform-origin: left center;
}
.js .reveal .section-heading::after,
.js .section-heading.reveal::after { animation: ruleGrow 0.9s cubic-bezier(0.22, 0.61, 0.36, 1) 0.1s both; }
@keyframes ruleGrow { from { transform: scaleX(0); opacity: 0; } to { transform: scaleX(1); opacity: 1; } }

/* 3. Eyebrow accent line: longer, and grows in on reveal */
.eyebrow::before { width: 34px; }
.js .reveal .eyebrow::before,
.js .reveal.eyebrow::before { animation: eyebrowRule 0.85s cubic-bezier(0.22, 0.61, 0.36, 1) both; }
@keyframes eyebrowRule { from { width: 0; } to { width: 34px; } }

/* 4. Clearer separation at the top of alternating bands */
.section-band.alt::after {
  content: "";
  position: absolute;
  top: 0; left: 50%;
  transform: translateX(-50%);
  width: min(440px, 62%); height: 1px;
  background: linear-gradient(90deg, transparent, rgba(227, 189, 99, 0.4), transparent);
  opacity: 0.55;
  pointer-events: none;
}

/* 5. Unified card interaction across every section grid */
.city-card, .definition-card, .audience-card, .loop-card, .memory-card,
.journey-card, .responsibility-card, .roadmap-card, .review-card {
  transition: transform 0.4s cubic-bezier(0.22, 0.61, 0.36, 1),
              border-color 0.4s ease, box-shadow 0.4s ease, background 0.4s ease;
}
.js .city-card:hover, .js .definition-card:hover, .js .audience-card:hover,
.js .loop-card:hover, .js .memory-card:hover, .js .journey-card:hover,
.js .responsibility-card:hover, .js .roadmap-card:hover, .js .review-card:hover {
  transform: translateY(-5px);
  border-color: var(--line-gold);
  box-shadow: 0 20px 44px -30px rgba(0, 0, 0, 0.8);
}

/* 6. Closing CTA — a distinct, luminous finale band */
.closing-cta {
  position: relative;
  overflow: hidden;
  padding: clamp(82px, 12vw, 156px) 0;
  border-top: 1px solid var(--glass-line);
  background:
    radial-gradient(130% 120% at 50% 0%, rgba(227, 189, 99, 0.08), transparent 58%),
    radial-gradient(90% 90% at 50% 130%, rgba(95, 227, 214, 0.06), transparent 60%);
}
.closing-cta h2 { font-size: clamp(2.2rem, 4.8vw, 3.7rem); }
body.zh .closing-cta h2 { font-size: clamp(2rem, 4.2vw, 3.2rem); }
.closing-cta .button { padding: 14px 32px; font-size: 1rem; }

@media (prefers-reduced-motion: reduce) {
  .js .reveal .section-heading::after,
  .js .section-heading.reveal::after,
  .js .reveal .eyebrow::before { animation: none; }
}

@media (max-width: 720px) {
  .section-band > .section-inner::before { font-size: 2.4rem; opacity: 0.6; top: -0.05em; }
}

/* =============================================================
   #model — institutional stack rebuilt as a layered diagram
   (a "city foundation": bedrock rules at top -> controlled
   future expansion at the base, linked by a meridian spine)
   ============================================================= */
.institutional-strip {
  counter-reset: layer;
  display: flex;
  flex-direction: column;
  gap: 14px;
  max-width: 880px;
  margin-left: auto;
  margin-right: auto;
  position: relative;
  padding-left: 48px;
}
.institutional-strip::before {                 /* meridian spine linking the strata */
  content: "";
  position: absolute;
  left: 17px; top: 18px; bottom: 18px;
  width: 2px;
  background: linear-gradient(180deg, rgba(227, 189, 99, 0.6), rgba(95, 227, 214, 0.5));
  opacity: 0.7;
}
.institutional-strip article {
  counter-increment: layer;
  display: grid;
  grid-template-columns: minmax(120px, 0.72fr) minmax(0, 1.5fr);
  gap: clamp(14px, 3vw, 38px);
  align-items: center;
  padding: clamp(16px, 2.3vw, 24px) clamp(20px, 2.6vw, 32px);
}
.institutional-strip article::before {        /* left-edge accent bar */
  content: "";
  position: absolute;
  left: 0; top: 16px; bottom: 16px;
  width: 3px; border-radius: 3px;
  background: linear-gradient(180deg, var(--gold), var(--cyan));
  opacity: 0.55;
}
.institutional-strip article::after {         /* numbered node sitting on the spine */
  content: counter(layer, decimal-leading-zero);
  position: absolute;
  left: -45px; top: 50%;
  transform: translateY(-50%);
  width: 30px; height: 30px;
  display: flex; align-items: center; justify-content: center;
  border-radius: 50%;
  background: var(--bg-2);
  border: 1px solid var(--line-gold);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--gold);
  box-shadow: 0 0 0 4px rgba(5, 8, 15, 0.92);
}
.institutional-strip article:first-child {    /* bedrock layer */
  border-color: var(--line-gold);
  background:
    linear-gradient(160deg, rgba(227, 189, 99, 0.1), transparent 62%),
    var(--panel);
}
.institutional-strip article:last-child {     /* controlled future expansion */
  border-style: dashed;
}
.institutional-strip article:last-child::after { color: var(--cyan); border-color: var(--line); }
.institutional-strip article small { margin-bottom: 6px; }
.js .institutional-strip article {
  transition: transform 0.4s cubic-bezier(0.22, 0.61, 0.36, 1), border-color 0.4s ease, box-shadow 0.4s ease;
}
.js .institutional-strip article:hover {
  transform: translateX(5px);
  border-color: var(--line-gold);
  box-shadow: 0 18px 40px -30px rgba(0, 0, 0, 0.8);
}
@media (max-width: 620px) {
  .institutional-strip { padding-left: 34px; }
  .institutional-strip article { grid-template-columns: 1fr; gap: 6px; }
  .institutional-strip::before { left: 11px; }
  .institutional-strip article::after { left: -34px; width: 26px; height: 26px; font-size: 0.66rem; }
}

/* =============================================================
   #identity — MID / MCID as a pair of trusted credential cards
   ============================================================= */
.credential-pair { display: grid; gap: 18px; }
.cred-card {
  position: relative;
  overflow: hidden;
  border: 1px solid var(--glass-line);
  border-radius: 18px;
  padding: 24px 26px 22px;
  background:
    linear-gradient(150deg, rgba(227, 189, 99, 0.1), transparent 52%),
    linear-gradient(330deg, rgba(95, 227, 214, 0.07), transparent 58%),
    var(--panel-2);
  box-shadow: var(--shadow-soft);
}
.cred-card::before {                   /* holographic sheen */
  content: "";
  position: absolute; top: -20%; bottom: -20%; left: -40%;
  width: 45%;
  background: linear-gradient(105deg, transparent, rgba(255, 255, 255, 0.07), transparent);
  transform: skewX(-16deg);
  pointer-events: none;
}
.cred-corp {
  background:
    linear-gradient(150deg, rgba(95, 227, 214, 0.1), transparent 52%),
    linear-gradient(330deg, rgba(227, 189, 99, 0.06), transparent 58%),
    var(--panel-2);
}
.cred-head { display: flex; align-items: center; justify-content: space-between; }
.cred-code { font-family: var(--font-mono); font-size: 1.5rem; font-weight: 600; letter-spacing: 0.06em; color: var(--gold); }
.cred-corp .cred-code { color: var(--cyan); }
.cred-chip {
  width: 38px; height: 28px; border-radius: 6px;
  background: linear-gradient(135deg, var(--gold), var(--gold-deep));
  position: relative; opacity: 0.9;
}
.cred-corp .cred-chip { background: linear-gradient(135deg, var(--cyan), #3aa79c); }
.cred-chip::after { content: ""; position: absolute; inset: 6px; border: 1px solid rgba(5, 8, 15, 0.35); border-radius: 3px; }
.cred-kind { font-family: var(--font-serif); font-size: 1.22rem; color: var(--ink); margin-top: 16px; }
body.zh .cred-kind { font-family: var(--font-cjk-serif); }
.cred-holder {
  font-family: var(--font-mono); font-size: 0.7rem; letter-spacing: 0.16em;
  text-transform: uppercase; color: var(--cyan); margin-top: 7px;
}
.cred-corp .cred-holder { color: var(--gold); }
body.zh .cred-holder { font-family: var(--font-cjk-sans); letter-spacing: 0.12em; text-transform: none; font-size: 0.78rem; }
.cred-attrs { list-style: none; margin: 18px 0 0; padding: 0; display: flex; flex-wrap: wrap; gap: 8px; }
.cred-attrs li {
  font-size: 0.78rem; color: var(--muted);
  border: 1px solid var(--line); border-radius: 999px;
  padding: 5px 13px; background: rgba(255, 255, 255, 0.02);
}
.cred-foot { margin-top: 18px; font-family: var(--font-mono); font-size: 0.62rem; letter-spacing: 0.32em; color: var(--faint); }
.js .cred-card { transition: transform 0.4s cubic-bezier(0.22, 0.61, 0.36, 1), box-shadow 0.4s ease, border-color 0.4s ease; }
.js .cred-card:hover { transform: translateY(-5px); border-color: var(--line-gold); box-shadow: 0 26px 54px -34px rgba(0, 0, 0, 0.85); }

/* =============================================================
   #operations — service steps as a connected loop rail
   ============================================================= */
.loop-grid { position: relative; padding-top: 58px; }
.loop-grid::before {                   /* the connecting rail above the cards */
  content: "";
  position: absolute; top: 26px; left: 9%; right: 9%; height: 2px;
  background: linear-gradient(90deg, transparent, var(--gold) 12%, var(--cyan) 88%, transparent);
  opacity: 0.5;
}
.loop-card { overflow: visible; padding-top: 22px; }
.loop-card small {
  position: absolute; top: -50px; left: 50%; transform: translateX(-50%);
  width: 42px; height: 42px;
  display: flex; align-items: center; justify-content: center;
  border-radius: 50%;
  background: var(--bg-2); border: 1px solid var(--line-gold);
  color: var(--gold); font-size: 0.95rem;
  box-shadow: 0 0 0 5px rgba(5, 8, 15, 0.96);
}
.loop-card:last-child small { color: var(--cyan); border-color: var(--line); }

/* =============================================================
   #memory — amplified concentric "year-rings" emblem
   ============================================================= */
.memory-section::before {
  background:
    radial-gradient(circle at center, rgba(227, 189, 99, 0.18), transparent 11%),
    repeating-radial-gradient(circle at center, transparent 0 30px, rgba(227, 189, 99, 0.13) 30px 31px),
    repeating-radial-gradient(circle at center, transparent 0 122px, rgba(95, 227, 214, 0.1) 122px 124px);
  opacity: 0.85;
}

@media (max-width: 920px) {
  .loop-grid { padding-top: 0; }
  .loop-grid::before { display: none; }
  .loop-card { padding-top: 24px; }
  .loop-card small { position: static; transform: none; box-shadow: none; margin-bottom: 12px; }
}

/* =============================================================
   #precedents — a lineage rail of trusted-governance precedents
   #assurance — separated-responsibility pillars
   (desktop-only enhancements; cards stack normally below 1081px)
   ============================================================= */
@media (min-width: 1081px) {
  /* #precedents: diamond nodes on a cyan->gold lineage line */
  #precedents .definition-grid { position: relative; padding-top: 46px; }
  #precedents .definition-grid::before {
    content: "";
    position: absolute; top: 22px; left: 8%; right: 8%; height: 2px;
    background: linear-gradient(90deg, transparent, var(--cyan) 12%, var(--gold) 88%, transparent);
    opacity: 0.4;
  }
  #precedents .definition-card { overflow: visible; }
  #precedents .definition-card::before {
    content: "";
    position: absolute; top: -31px; left: 50%;
    transform: translateX(-50%) rotate(45deg);
    width: 14px; height: 14px;
    background: var(--bg-2); border: 1px solid var(--cyan);
    box-shadow: 0 0 0 5px rgba(5, 8, 15, 0.96);
  }

  /* #assurance: 5 powers branching from one shared mandate */
  .responsibility-grid { position: relative; padding-top: 38px; }
  .responsibility-grid::before {
    content: "";
    position: absolute; top: 17px; left: 6%; right: 6%; height: 2px;
    background: linear-gradient(90deg, transparent, var(--line-gold), var(--line-gold), transparent);
    opacity: 0.55;
  }
  .responsibility-card::after {        /* drop connector from the mandate bar */
    content: "";
    position: absolute; top: -13px; left: 50%;
    transform: translateX(-50%);
    width: 1px; height: 13px;
    background: var(--line-gold); opacity: 0.5;
  }
  .responsibility-card::before {       /* node sitting on the mandate bar */
    content: "";
    position: absolute; top: -24px; left: 50%;
    transform: translateX(-50%);
    width: 11px; height: 11px; border-radius: 50%;
    background: var(--bg-2); border: 1px solid var(--line-gold);
    box-shadow: 0 0 0 4px rgba(5, 8, 15, 0.96);
  }
  .responsibility-card:nth-child(even)::before { border-color: var(--cyan); }
}

/* =============================================================
   Mobile fix: language switch reachable inside the hamburger menu
   (the topbar .language-link is hidden < 920px, so this clone
   gives phone users a clear EN <-> 中文 toggle in the menu)
   ============================================================= */
.language-link-menu { display: none; }
@media (max-width: 920px) {
  .site-nav .language-link-menu {
    display: block;
    margin-top: 20px;
    padding: 13px 18px;
    border: 1px solid var(--line-gold);
    border-radius: 10px;
    color: var(--gold);
    font-family: var(--font-mono);
    font-size: 1rem;
    letter-spacing: 0.08em;
    text-align: center;
    text-decoration: none;
    transition: background 0.25s ease, color 0.25s ease, border-color 0.25s ease;
  }
  body.zh .site-nav .language-link-menu { font-family: var(--font-cjk-sans); letter-spacing: 0.04em; }
  .site-nav .language-link-menu:hover,
  .site-nav .language-link-menu:focus-visible {
    background: rgba(227, 189, 99, 0.12);
    color: var(--gold-bright);
    border-color: var(--gold);
  }
}

/* =============================================================
   Refinement pass: tonal light rhythm · act-break moment · measure
   ============================================================= */

/* (1) Light rhythm — alternating bands gain a soft lit top edge so the
   long scroll breathes between light and dark instead of one flat slab */
.section-band.alt::before {
  background:
    radial-gradient(130% 62% at 50% 0%, rgba(227, 189, 99, 0.055), transparent 56%),
    linear-gradient(180deg, rgba(12, 20, 38, 0.6), rgba(7, 12, 22, 0.18));
}

/* (3) Comfortable measure on the section lead copy */
.section-copy { max-width: 46ch; line-height: 1.7; }

/* (2) Act-break — the memory closing line becomes a cinematic pause */
.memory-spine {
  position: relative;
  z-index: 0;
  margin-top: clamp(58px, 7vw, 100px);
  padding: clamp(40px, 6vw, 76px) 0 clamp(18px, 3vw, 34px);
  align-items: center;
  gap: 16px;
}
.memory-spine::before {                /* ambient glow behind the statement */
  content: "";
  position: absolute; left: 50%; top: 52%; transform: translate(-50%, -50%);
  width: min(720px, 92%); height: 240px;
  background: radial-gradient(58% 60% at 50% 50%, rgba(227, 189, 99, 0.08), transparent 72%);
  z-index: -1; pointer-events: none;
}
.memory-spine::after {                 /* small gold tick above the line */
  content: "";
  position: absolute; left: 50%; top: 0; transform: translateX(-50%);
  width: 52px; height: 2px;
  background: linear-gradient(90deg, transparent, var(--gold), transparent);
}
.memory-spine strong { font-size: clamp(1.55rem, 3.1vw, 2.5rem); max-width: 22ch; }
.memory-spine span { max-width: 54ch; }

/* =============================================================
   Meridian Phone — product family additions
   Care / Kids / One — Three Human Interfaces · One Core System
   ============================================================= */

/* ---- Three-phone family grid (the signature product shelf) ---- */
.phone-family {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
  margin-top: clamp(28px, 4vw, 44px);
}
.phone-card {
  position: relative;
  padding: clamp(28px, 3vw, 38px) clamp(24px, 2.6vw, 32px) clamp(24px, 3vw, 32px);
  border: 1px solid var(--glass-line);
  border-radius: 22px;
  background:
    linear-gradient(165deg, rgba(227, 189, 99, 0.06), transparent 56%),
    var(--panel-2);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  box-shadow: var(--shadow-soft);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  gap: 14px;
  transition: transform 0.4s cubic-bezier(0.22, 0.61, 0.36, 1),
              border-color 0.4s ease, box-shadow 0.4s ease;
}
.phone-card:hover {
  transform: translateY(-6px);
  border-color: var(--line-gold);
  box-shadow: 0 30px 60px -36px rgba(0, 0, 0, 0.9);
}
.phone-card::before {
  /* soft accent bar at top, tinted by variant */
  content: "";
  position: absolute;
  top: 0; left: 24px; right: 24px;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--accent), transparent);
}
.phone-card.care { --accent: #f1d49a; }
.phone-card.kids { --accent: #b8a7e3; }
.phone-card.one  { --accent: #6fb9d2; }

.phone-mock {
  /* device frame — pure CSS phone shape, holds the OS preview */
  position: relative;
  width: 100%;
  aspect-ratio: 5 / 9;
  max-height: 280px;
  margin: 0 auto 8px;
  border-radius: 26px;
  border: 1px solid var(--line);
  background:
    linear-gradient(180deg, rgba(20, 32, 56, 0.6), rgba(8, 14, 26, 0.9));
  box-shadow: inset 0 0 0 4px rgba(5, 8, 15, 0.9), 0 18px 42px -28px rgba(0, 0, 0, 0.9);
  overflow: hidden;
}
.phone-mock::before {
  /* speaker notch */
  content: "";
  position: absolute;
  top: 10px; left: 50%;
  transform: translateX(-50%);
  width: 64px; height: 6px;
  border-radius: 3px;
  background: rgba(5, 8, 15, 0.95);
  box-shadow: inset 0 0 0 1px rgba(168, 188, 220, 0.10);
}
.phone-screen {
  position: absolute;
  inset: 22px 12px 18px;
  border-radius: 18px;
  padding: 14px 12px;
  background:
    radial-gradient(120% 60% at 50% -20%, rgba(227, 189, 99, 0.10), transparent 60%),
    linear-gradient(180deg, #0b1428, #0a1426 80%);
  display: flex;
  flex-direction: column;
  gap: 6px;
  font-family: var(--font-mono);
  color: var(--ink);
}
body.zh .phone-screen { font-family: var(--font-cjk-sans); }
.phone-screen .scr-head {
  display: flex; align-items: center; justify-content: space-between;
  font-size: 0.6rem; color: var(--subtle); letter-spacing: 0.08em;
}
.phone-screen .scr-time { color: var(--ink); font-weight: 600; }
.phone-screen .scr-title {
  font-size: 0.74rem;
  font-weight: 600;
  color: var(--gold-bright);
  letter-spacing: 0.06em;
  margin-top: 4px;
}
.phone-screen .scr-tiles {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 6px;
  margin-top: 6px;
}
.phone-screen .scr-tile {
  padding: 8px 8px;
  border-radius: 8px;
  border: 1px solid rgba(168, 188, 220, 0.16);
  background: rgba(13, 21, 38, 0.7);
  font-size: 0.58rem;
  color: var(--muted);
  letter-spacing: 0.06em;
  display: flex; align-items: center; gap: 6px;
}
.phone-screen .scr-tile.accent {
  border-color: rgba(227, 189, 99, 0.5);
  background: linear-gradient(135deg, rgba(227, 189, 99, 0.18), rgba(227, 189, 99, 0.04));
  color: var(--gold-bright);
}
.phone-card.kids .phone-screen .scr-tile.accent {
  border-color: rgba(184, 167, 227, 0.55);
  background: linear-gradient(135deg, rgba(184, 167, 227, 0.20), rgba(184, 167, 227, 0.04));
  color: #d6c9f4;
}
.phone-card.one .phone-screen .scr-tile.accent {
  border-color: rgba(111, 185, 210, 0.55);
  background: linear-gradient(135deg, rgba(111, 185, 210, 0.18), rgba(111, 185, 210, 0.04));
  color: var(--cyan-soft);
}
.phone-screen .scr-dot {
  width: 6px; height: 6px; border-radius: 50%; background: var(--accent, var(--gold));
  box-shadow: 0 0 6px var(--accent, var(--gold));
}

.phone-meta {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: auto;
}
.phone-name {
  font-family: var(--font-serif);
  font-weight: 600;
  font-size: 1.3rem;
  color: var(--ink);
  letter-spacing: 0.01em;
}
body.zh .phone-name { font-family: var(--font-cjk-serif); font-weight: 700; }
.phone-kicker {
  display: inline-block;
  margin-bottom: 4px;
  font-family: var(--font-mono);
  font-size: 0.66rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--accent);
}
body.zh .phone-kicker { font-family: var(--font-cjk-sans); letter-spacing: 0.16em; text-transform: none; font-size: 0.74rem; }
.phone-price {
  font-family: var(--font-mono);
  font-size: 1.18rem;
  font-weight: 600;
  color: var(--gold-bright);
  letter-spacing: 0.02em;
}
.phone-price small { font-family: var(--font-mono); font-size: 0.66rem; color: var(--subtle); letter-spacing: 0.16em; text-transform: uppercase; margin-left: 6px; }
.phone-tag {
  display: inline-block;
  padding: 3px 10px;
  font-family: var(--font-mono);
  font-size: 0.62rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--subtle);
  border: 1px solid var(--line);
  border-radius: 999px;
}
body.zh .phone-tag { font-family: var(--font-cjk-sans); letter-spacing: 0.12em; text-transform: none; font-size: 0.74rem; }
.phone-card p { margin: 0; color: var(--muted); font-size: 0.95rem; }
.phone-feats {
  list-style: none;
  margin: 8px 0 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.phone-feats li {
  position: relative;
  padding-left: 18px;
  font-size: 0.85rem;
  color: var(--muted);
}
.phone-feats li::before {
  content: "";
  position: absolute;
  left: 0; top: 9px;
  width: 8px; height: 1px;
  background: var(--accent);
}

/* ---- Lifecycle swim — 6 stages × 4 lanes (mini) ---- */
.lifecycle-grid {
  display: grid;
  grid-template-columns: 140px repeat(6, 1fr);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--panel-quiet);
  font-size: 0.84rem;
}
.lifecycle-grid > div {
  padding: 12px 10px;
  border-bottom: 1px solid var(--line-soft);
  border-right: 1px solid var(--line-soft);
}
.lifecycle-grid > div:nth-child(7n) { border-right: none; }
.lifecycle-grid .lc-head {
  background: rgba(13, 21, 38, 0.78);
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--gold);
  text-align: center;
}
body.zh .lifecycle-grid .lc-head { font-family: var(--font-cjk-sans); letter-spacing: 0.12em; text-transform: none; font-size: 0.78rem; }
.lifecycle-grid .lc-lane {
  background: rgba(13, 21, 38, 0.55);
  color: var(--ink);
  font-weight: 500;
}
.lifecycle-grid .lc-cell {
  text-align: center;
  font-family: var(--font-mono);
  font-size: 1.2rem;
  line-height: 1;
}
.lifecycle-grid .lc-cell.p { color: var(--gold-bright); }
.lifecycle-grid .lc-cell.s { color: var(--cyan); }
.lifecycle-grid .lc-cell.x { color: rgba(168, 188, 220, 0.15); }
.lifecycle-legend {
  display: flex;
  gap: 22px;
  margin-top: 14px;
  font-size: 0.82rem;
  color: var(--muted);
  font-family: var(--font-mono);
  letter-spacing: 0.04em;
}
body.zh .lifecycle-legend { font-family: var(--font-cjk-sans); }
.lifecycle-legend .dot { display: inline-block; width: 10px; height: 10px; border-radius: 50%; margin-right: 8px; vertical-align: middle; }
.lifecycle-legend .dot.p { background: var(--gold); box-shadow: 0 0 10px rgba(227,189,99,0.4); }
.lifecycle-legend .dot.s { background: var(--cyan); box-shadow: 0 0 10px rgba(95,227,214,0.4); }

/* ---- Merchant Pay flow (4-step rail) ---- */
.merchant-flow {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 18px;
  margin-top: clamp(28px, 4vw, 44px);
  position: relative;
}
.merchant-flow::before {
  content: "";
  position: absolute;
  top: 38px; left: 8%; right: 8%;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--cyan) 14%, var(--gold) 86%, transparent);
  opacity: 0.5;
  z-index: 0;
}
.merchant-step {
  position: relative;
  padding: 24px 22px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--panel);
  backdrop-filter: blur(6px);
}
.merchant-step::before {
  content: "";
  position: absolute;
  top: -7px; left: 28px;
  width: 12px; height: 12px;
  border-radius: 50%;
  background: var(--gold);
  box-shadow: 0 0 0 4px rgba(227,189,99,0.18), 0 0 12px rgba(227,189,99,0.6);
}
.merchant-step:last-child::before { background: var(--cyan); box-shadow: 0 0 0 4px rgba(95,227,214,0.18), 0 0 12px rgba(95,227,214,0.55); }
.merchant-step .step-no {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--gold);
  letter-spacing: 0.2em;
  margin-top: 8px;
  text-transform: uppercase;
}
body.zh .merchant-step .step-no { font-family: var(--font-cjk-sans); letter-spacing: 0.16em; text-transform: none; }
.merchant-step h3 { font-size: 1.08rem; margin: 8px 0 10px; color: var(--ink); }
.merchant-step p { margin: 0; font-size: 0.88rem; color: var(--muted); }

/* ---- Pricing tier highlight ---- */
.pricing-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.pricing-card {
  position: relative;
  padding: 30px 28px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--panel);
  text-align: left;
}
.pricing-card .ptag {
  display: inline-block;
  padding: 3px 10px;
  border-radius: 999px;
  background: rgba(227, 189, 99, 0.10);
  color: var(--gold);
  font-family: var(--font-mono);
  font-size: 0.65rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  margin-bottom: 14px;
}
body.zh .pricing-card .ptag { font-family: var(--font-cjk-sans); letter-spacing: 0.16em; text-transform: none; font-size: 0.74rem; }
.pricing-card h3 { font-size: 1.32rem; color: var(--ink); margin-bottom: 8px; }
.pricing-card .pprice {
  font-family: var(--font-serif);
  font-size: 2.6rem;
  font-weight: 600;
  color: var(--gold-bright);
  line-height: 1;
  margin: 6px 0 4px;
}
body.zh .pricing-card .pprice { font-family: var(--font-cjk-serif); font-weight: 700; }
.pricing-card .pprice em {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--subtle);
  margin-left: 6px;
  font-style: normal;
  letter-spacing: 0.1em;
}
.pricing-card .pdesc { margin: 8px 0 14px; font-size: 0.9rem; color: var(--muted); }
.pricing-card.anchor {
  border-color: var(--line-gold);
  background:
    linear-gradient(160deg, rgba(227, 189, 99, 0.10), transparent 60%),
    var(--panel-2);
  box-shadow: 0 30px 64px -36px rgba(0,0,0,0.85);
}
.pricing-card.anchor::before {
  content: "ANCHOR · 锚定";
  position: absolute;
  top: -10px; right: 22px;
  font-family: var(--font-mono);
  font-size: 0.62rem;
  letter-spacing: 0.24em;
  padding: 4px 10px;
  border-radius: 999px;
  background: var(--gold);
  color: #1a1305;
}
body.zh .pricing-card.anchor::before { content: "锚定 · ANCHOR"; font-family: var(--font-cjk-sans); letter-spacing: 0.16em; }

/* ---- Open standards — small chip grid ---- */
.std-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 14px;
}
.std-chip {
  padding: 16px 18px;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: var(--panel-quiet);
}
.std-chip .scode {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--cyan);
  letter-spacing: 0.04em;
  margin-bottom: 8px;
}
.std-chip h3 { font-size: 1rem; color: var(--ink); margin: 0 0 6px; }
.std-chip p { margin: 0; font-size: 0.85rem; color: var(--muted); }

/* ---- Path A boundary — emphasis panel ---- */
.path-a {
  margin-top: clamp(36px, 4vw, 56px);
  padding: clamp(32px, 4vw, 50px);
  border: 1px solid var(--line-gold);
  border-radius: 18px;
  background:
    linear-gradient(140deg, rgba(227, 189, 99, 0.12), transparent 56%),
    var(--panel-2);
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.1fr);
  gap: clamp(28px, 4vw, 56px);
  align-items: center;
}
.path-a .path-eyebrow { color: var(--gold); font-family: var(--font-mono); font-size: 0.72rem; letter-spacing: 0.24em; text-transform: uppercase; margin-bottom: 12px; display: inline-block; }
body.zh .path-a .path-eyebrow { font-family: var(--font-cjk-sans); letter-spacing: 0.16em; text-transform: none; font-size: 0.8rem; }
.path-a h2 {
  font-size: clamp(1.6rem, 3vw, 2.4rem);
  margin: 0 0 14px;
  color: var(--ink);
}
.path-a p { margin: 0; color: var(--muted); }
.path-a .pa-lines {
  display: flex;
  flex-direction: column;
  gap: 14px;
}
.path-a .pa-line {
  padding: 16px 20px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: rgba(13, 21, 38, 0.55);
  display: grid;
  grid-template-columns: 26px 1fr;
  gap: 14px;
  align-items: start;
  font-size: 0.94rem;
  color: var(--muted);
}
.path-a .pa-line strong { color: var(--gold-bright); font-weight: 600; }
.path-a .pa-line .check {
  display: grid; place-items: center;
  width: 22px; height: 22px;
  border-radius: 50%;
  background: rgba(95, 227, 214, 0.16);
  color: var(--cyan);
  font-size: 0.82rem;
  font-weight: 700;
}
.path-a .pa-line.no .check {
  background: rgba(255, 140, 140, 0.12); color: #ff9b9b;
}

@media (max-width: 1080px) {
  .phone-family, .merchant-flow, .pricing-grid { grid-template-columns: repeat(2, 1fr); }
  .merchant-flow::before { display: none; }
  .lifecycle-grid { grid-template-columns: 110px repeat(6, 1fr); font-size: 0.78rem; }
}
@media (max-width: 720px) {
  .phone-family, .merchant-flow, .pricing-grid { grid-template-columns: 1fr; }
  .lifecycle-grid { grid-template-columns: 90px repeat(6, 1fr); font-size: 0.7rem; }
  .lifecycle-grid > div { padding: 8px 4px; }
  .path-a { grid-template-columns: 1fr; }
}

/* ---- Meridian Phone briefing strip (grid layout) ---- */
.briefing-strip .strip-inner {
  max-width: var(--max);
  margin: 0 auto;
  padding: 16px var(--gutter);
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 18px;
  align-items: stretch;
}
.strip-item {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 0 14px;
  border-left: 1px solid var(--line-soft);
}
.strip-item:first-child { border-left: 0; padding-left: 0; }
.strip-item small {
  font-family: var(--font-mono);
  font-size: 0.62rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--gold);
}
body.zh .strip-item small { font-family: var(--font-cjk-sans); letter-spacing: 0.14em; text-transform: none; font-size: 0.72rem; }
.strip-item strong {
  font-size: 0.94rem;
  color: var(--ink);
  font-weight: 500;
  letter-spacing: 0.01em;
}
@media (max-width: 1080px) {
  .briefing-strip .strip-inner { grid-template-columns: repeat(3, 1fr); }
  .strip-item:nth-child(4) { border-left: 0; padding-left: 0; }
}
@media (max-width: 720px) {
  .briefing-strip .strip-inner { grid-template-columns: 1fr 1fr; }
  .strip-item { border-left: 0; padding-left: 0; }
}