/* ============================================================
   百草云膳坊 · 官网 · Editorial / 典籍书卷 aesthetic
   Paper · Ink · Cinnabar Seal · Jade · Gold
   ============================================================ */

:root {
  --paper:        #F2EBD7;
  --paper-deep:   #E8DFC4;
  --paper-dark:   #D9CEAE;
  --ink:          #1A1512;
  --ink-soft:     #3D342B;
  --ink-muted:    #6B5F50;
  --ink-ghost:    #9A8E7E;
  --cinnabar:     #A8322E;
  --cinnabar-dp:  #7D201E;
  --cinnabar-sft: rgba(168, 50, 46, 0.08);
  --jade:         #2F4A33;
  --jade-soft:    #5F7A5A;
  --gold:         #A88A3F;
  --gold-soft:    #C9A85C;

  --font-display: "Noto Serif SC", "Source Han Serif SC", "Songti SC", "STSong", serif;
  --font-body:    "Noto Serif SC", "Source Han Serif SC", "STSong", serif;
  --font-latin:   "Cormorant Garamond", "EB Garamond", "Cardo", Georgia, serif;
  --font-brush:   "Ma Shan Zheng", "Noto Serif SC", cursive;

  --baseline: 24px;
  --container: 1280px;
  --folio-margin: 72px;

  --shadow-leaf: 0 1px 2px rgba(26, 21, 18, 0.04), 0 6px 20px rgba(26, 21, 18, 0.06);
  --shadow-seal: 0 2px 6px rgba(168, 50, 46, 0.18);
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-body);
  font-weight: 400;
  font-size: 16px;
  line-height: 1.95;
  color: var(--ink-soft);
  background-color: var(--paper);
  background-image:
    radial-gradient(ellipse 80% 45% at 15% 0%, rgba(168, 50, 46, 0.035), transparent 55%),
    radial-gradient(ellipse 60% 50% at 92% 70%, rgba(47, 74, 51, 0.035), transparent 55%),
    url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='220' height='220'><filter id='n'><feTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2' seed='3'/><feColorMatrix values='0 0 0 0 0.10  0 0 0 0 0.08  0 0 0 0 0.06  0 0 0 0.42 0'/></filter><rect width='220' height='220' filter='url(%23n)' opacity='0.18'/></svg>");
  background-attachment: fixed;
  overflow-x: hidden;
  letter-spacing: 0.01em;
}

a { color: inherit; text-decoration: none; transition: color 0.3s; }
a:hover { color: var(--cinnabar); }
img, svg { display: block; max-width: 100%; }
button { font: inherit; border: none; background: none; cursor: pointer; color: inherit; }

h1, h2, h3, h4, h5 {
  font-family: var(--font-display);
  color: var(--ink);
  font-weight: 600;
  line-height: 1.3;
  letter-spacing: 0.04em;
}

/* ============================================================
   BOOKBINDING MARGINALIA — left edge decoration
   ============================================================ */
.marginalia {
  position: fixed;
  left: 0; top: 0; bottom: 0;
  width: var(--folio-margin);
  pointer-events: none;
  z-index: 2;
}
.marginalia::before {
  content: '';
  position: absolute;
  left: 36px; top: 12%; bottom: 12%;
  width: 0.5px;
  background: linear-gradient(180deg, transparent, var(--cinnabar) 12%, var(--cinnabar) 88%, transparent);
  opacity: 0.35;
}
.marginalia .punch {
  position: absolute;
  left: 32px;
  width: 8px; height: 8px;
  border-radius: 50%;
  background: var(--paper);
  box-shadow: 0 0 0 1px var(--cinnabar);
  opacity: 0.45;
}
.marginalia .punch:nth-child(1) { top: 16%; }
.marginalia .punch:nth-child(2) { top: 38%; }
.marginalia .punch:nth-child(3) { top: 60%; }
.marginalia .punch:nth-child(4) { top: 82%; }

.marginalia .folio-num {
  position: absolute;
  left: 6px; top: 5%;
  writing-mode: vertical-rl;
  font-family: var(--font-latin);
  font-style: italic;
  font-size: 12px;
  letter-spacing: 3px;
  color: var(--ink-ghost);
  text-transform: uppercase;
}
.marginalia .folio-foot {
  position: absolute;
  left: 8px; bottom: 5%;
  writing-mode: vertical-rl;
  font-family: var(--font-display);
  font-size: 11px;
  letter-spacing: 6px;
  color: var(--ink-ghost);
}

/* ============================================================
   NAV / FOLIO HEADER
   ============================================================ */
.folio-nav {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(242, 235, 215, 0.78);
  backdrop-filter: saturate(140%) blur(16px);
  -webkit-backdrop-filter: saturate(140%) blur(16px);
  border-bottom: 0.5px solid rgba(26, 21, 18, 0.12);
}
.folio-nav-inner {
  max-width: var(--container);
  margin: 0 auto;
  padding: 18px 48px 18px calc(var(--folio-margin) + 24px);
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 40px;
}
.folio-brand {
  display: flex;
  align-items: center;
  gap: 14px;
}
.folio-seal {
  width: 36px; height: 36px;
  flex-shrink: 0;
}
.folio-brand-text {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 19px;
  letter-spacing: 6px;
  color: var(--ink);
}
.folio-brand-sub {
  display: block;
  font-family: var(--font-latin);
  font-style: italic;
  font-size: 10.5px;
  letter-spacing: 3px;
  color: var(--ink-ghost);
  text-transform: uppercase;
  margin-top: 1px;
  font-weight: 500;
}
.folio-links {
  display: flex;
  gap: 32px;
  justify-self: end;
  font-family: var(--font-display);
  font-size: 13.5px;
  letter-spacing: 3px;
  color: var(--ink-muted);
}
.folio-links a { position: relative; padding: 4px 0; }
.folio-links a::after {
  content: '';
  position: absolute;
  left: 50%; bottom: -2px;
  width: 4px; height: 4px;
  background: var(--cinnabar);
  border-radius: 50%;
  transform: translateX(-50%) scale(0);
  transition: transform 0.3s;
}
.folio-links a:hover::after { transform: translateX(-50%) scale(1); }

.folio-cta {
  font-family: var(--font-display);
  font-size: 13.5px;
  letter-spacing: 4px;
  padding: 10px 22px;
  color: var(--paper);
  background: var(--ink);
  border-radius: 2px;
  transition: background 0.3s, transform 0.3s;
  position: relative;
  overflow: hidden;
}
.folio-cta:hover {
  background: var(--cinnabar);
  color: var(--paper);
  transform: translate(-1px, -1px);
  box-shadow: 2px 2px 0 var(--ink);
}

/* ============================================================
   LAYOUT PRIMITIVES
   ============================================================ */
.folio {
  max-width: var(--container);
  margin: 0 auto;
  padding-left: calc(var(--folio-margin) + 24px);
  padding-right: 48px;
}

.chapter {
  padding: 120px 0 80px;
  position: relative;
}
.chapter-hr {
  max-width: var(--container);
  margin: 0 auto;
  padding-left: calc(var(--folio-margin) + 24px);
  padding-right: 48px;
}
.chapter-hr::after {
  content: '◆';
  display: block;
  text-align: center;
  color: var(--gold);
  font-size: 14px;
  margin: 40px 0 0;
  opacity: 0.6;
}

.chapter-head {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: end;
  gap: 36px;
  margin-bottom: 72px;
  padding-bottom: 20px;
  border-bottom: 0.5px solid rgba(26, 21, 18, 0.18);
}
.chapter-num {
  font-family: var(--font-display);
  font-size: 112px;
  line-height: 0.85;
  color: var(--cinnabar);
  font-weight: 300;
  letter-spacing: -0.04em;
  padding-bottom: 4px;
}
.chapter-title {
  font-family: var(--font-display);
  font-size: 40px;
  font-weight: 500;
  letter-spacing: 16px;
  padding-bottom: 10px;
  color: var(--ink);
}
.chapter-sub {
  font-family: var(--font-latin);
  font-style: italic;
  font-size: 16px;
  color: var(--ink-ghost);
  letter-spacing: 2px;
  padding-bottom: 14px;
  text-align: right;
  max-width: 240px;
}

/* INK BUTTONS */
.ink-btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-display);
  font-size: 15px;
  letter-spacing: 6px;
  font-weight: 500;
  padding: 15px 32px;
  border-radius: 1px;
  transition: all 0.35s cubic-bezier(0.4, 0, 0.2, 1);
  cursor: pointer;
  position: relative;
  overflow: hidden;
  border: 0.5px solid var(--ink);
}
.ink-btn.primary {
  background: var(--ink);
  color: var(--paper);
}
.ink-btn.primary::before {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--cinnabar);
  transform: translateY(100%);
  transition: transform 0.35s cubic-bezier(0.4, 0, 0.2, 1);
  z-index: 0;
}
.ink-btn.primary:hover::before { transform: translateY(0); }
.ink-btn.primary > * { position: relative; z-index: 1; }
.ink-btn.primary:hover {
  color: var(--paper);
  transform: translate(-2px, -2px);
  box-shadow: 3px 3px 0 var(--gold);
  border-color: var(--cinnabar);
}
.ink-btn.outline {
  color: var(--ink);
  background: transparent;
}
.ink-btn.outline:hover {
  background: var(--ink);
  color: var(--paper);
  transform: translate(-2px, -2px);
  box-shadow: 3px 3px 0 var(--cinnabar);
}
.ink-btn .latin {
  font-family: var(--font-latin);
  font-style: italic;
  font-size: 13px;
  letter-spacing: 1px;
  opacity: 0.8;
}

/* ============================================================
   HERO — vertical title column × 素问 watermark × seal
   ============================================================ */
.hero {
  position: relative;
  min-height: 92vh;
  padding: 80px 0 100px;
  overflow: hidden;
}

.hero-watermark {
  position: absolute;
  top: 80px; right: 24px;
  writing-mode: vertical-rl;
  font-family: var(--font-display);
  font-size: 14px;
  font-weight: 300;
  line-height: 2.8;
  letter-spacing: 6px;
  color: var(--ink);
  opacity: 0.045;
  pointer-events: none;
  user-select: none;
  max-height: 78vh;
  max-width: 140px;
  overflow: hidden;
  padding: 0 8px;
  z-index: 0;
}

.hero-grid {
  max-width: var(--container);
  margin: 0 auto;
  padding-left: calc(var(--folio-margin) + 24px);
  padding-right: 48px;
  display: grid;
  grid-template-columns: 130px 1fr 200px;
  gap: 64px;
  align-items: start;
  padding-top: 40px;
  position: relative;
  z-index: 1;
}

.hero-vertical {
  position: relative;
  opacity: 0;
  animation: rise-in 1.4s 0.1s cubic-bezier(0.16, 1, 0.3, 1) forwards;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding-top: 8px;
}
.vertical-title {
  writing-mode: vertical-rl;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 68px;
  line-height: 1.14;
  letter-spacing: 10px;
  color: var(--ink);
  padding: 4px 0;
  min-height: 440px;
  text-align: center;
}
.vertical-rule {
  position: absolute;
  top: 4px;
  height: 440px;
  left: -20px;
  width: 0.5px;
  background: var(--ink);
  opacity: 0.22;
}

.seal-stamp {
  margin-top: 24px;
  width: 76px; height: 76px;
  opacity: 0;
  transform: rotate(-8deg) scale(0.5);
  animation: stamp-in 0.9s 1.6s cubic-bezier(0.34, 1.56, 0.64, 1) forwards;
}

.vertical-latin {
  margin-top: 16px;
  font-family: var(--font-latin);
  font-style: italic;
  font-size: 11px;
  letter-spacing: 2px;
  color: var(--ink-ghost);
  text-align: center;
  writing-mode: vertical-rl;
  line-height: 1.6;
  text-orientation: sideways;
  height: 160px;
}

@keyframes stamp-in {
  0%   { opacity: 0; transform: rotate(-20deg) scale(0.4); }
  40%  { opacity: 0.8; transform: rotate(-10deg) scale(1.15); }
  70%  { opacity: 1; transform: rotate(-7deg) scale(0.96); }
  100% { opacity: 1; transform: rotate(-8deg) scale(1); }
}

.hero-horizontal > * {
  opacity: 0;
  animation: rise-in 1.2s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}
.hero-horizontal .eyebrow         { animation-delay: 0.35s; }
.hero-horizontal .display-line    { animation-delay: 0.55s; }
.hero-horizontal .hero-body       { animation-delay: 0.75s; }
.hero-horizontal .hero-epigram    { animation-delay: 0.95s; }
.hero-horizontal .hero-cta        { animation-delay: 1.15s; }

@keyframes rise-in {
  from { opacity: 0; transform: translateY(28px); }
  to   { opacity: 1; transform: translateY(0); }
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  font-family: var(--font-display);
  font-size: 12.5px;
  font-weight: 500;
  letter-spacing: 5px;
  color: var(--ink-muted);
  margin-bottom: 28px;
  padding: 4px 0;
}
.eyebrow::before {
  content: '';
  width: 24px; height: 1px;
  background: var(--cinnabar);
}

.display-line {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 46px;
  line-height: 1.35;
  letter-spacing: 3px;
  color: var(--ink);
  margin-bottom: 36px;
  max-width: 680px;
}
.display-line .cinnabar { color: var(--cinnabar); }
.display-line .gold { color: var(--gold); }
.display-line .underbrush {
  position: relative;
  display: inline-block;
}
.display-line .underbrush::after {
  content: '';
  position: absolute;
  left: -2px; right: -2px; bottom: -2px;
  height: 14px;
  background: var(--gold);
  opacity: 0.22;
  z-index: -1;
  transform: skewX(-8deg);
}

.hero-body {
  font-family: var(--font-display);
  font-size: 16.5px;
  line-height: 2.15;
  color: var(--ink-soft);
  margin-bottom: 44px;
  max-width: 540px;
  letter-spacing: 0.03em;
}
.hero-body em {
  font-style: normal;
  color: var(--cinnabar);
  font-weight: 500;
}
.hero-body .latin-cite {
  font-family: var(--font-latin);
  font-style: italic;
  color: var(--ink-muted);
  font-size: 14px;
  letter-spacing: 1px;
}

.hero-epigram {
  display: flex;
  align-items: center;
  gap: 20px;
  font-family: var(--font-display);
  font-size: 17px;
  letter-spacing: 8px;
  color: var(--ink);
  padding: 14px 0 18px;
  margin-bottom: 40px;
  border-top: 0.5px solid rgba(26, 21, 18, 0.2);
  border-bottom: 0.5px solid rgba(26, 21, 18, 0.2);
  max-width: 640px;
  flex-wrap: wrap;
}
.hero-epigram .num {
  color: var(--gold);
  font-weight: 700;
  font-size: 22px;
}
.hero-epigram .dot {
  color: var(--cinnabar);
  opacity: 0.7;
  font-size: 14px;
}

.hero-cta {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
}

/* Colophon column (right — QR + quote) */
.hero-colophon {
  opacity: 0;
  animation: rise-in 1.4s 0.9s cubic-bezier(0.16, 1, 0.3, 1) forwards;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 18px;
  padding-top: 20px;
}
.hero-qr-frame {
  position: relative;
  padding: 12px;
  background: var(--paper);
  border: 0.5px solid var(--ink);
  box-shadow: var(--shadow-leaf);
}
.hero-qr-frame::before,
.hero-qr-frame::after {
  content: '';
  position: absolute;
  width: 12px; height: 12px;
  border: 1px solid var(--cinnabar);
  opacity: 0.7;
}
.hero-qr-frame::before { top: -4px; left: -4px; border-right: none; border-bottom: none; }
.hero-qr-frame::after { bottom: -4px; right: -4px; border-left: none; border-top: none; }
.hero-qr-frame img { width: 180px; height: 180px; display: block; image-rendering: crisp-edges; image-rendering: pixelated; }

.hero-colophon-text {
  font-family: var(--font-display);
  font-size: 13px;
  letter-spacing: 5px;
  color: var(--ink-muted);
  text-align: center;
  line-height: 1.6;
}
.hero-colophon-text .sub {
  font-family: var(--font-latin);
  font-style: italic;
  display: block;
  font-size: 10.5px;
  letter-spacing: 2px;
  margin-top: 4px;
  color: var(--ink-ghost);
}
.hero-colophon-url {
  display: block;
  font-family: var(--font-latin);
  font-size: 11px;
  letter-spacing: 0.5px;
  color: var(--ink-muted);
  text-align: center;
  margin-top: 6px;
  padding: 4px 10px;
  border: 0.5px dashed rgba(26, 21, 18, 0.25);
  text-decoration: none;
  transition: color 0.25s, border-color 0.25s;
}
.hero-colophon-url:hover {
  color: var(--cinnabar);
  border-color: var(--cinnabar);
}

/* ============================================================
   PREFACE — drop cap, classical prose feel
   ============================================================ */
.preface {
  padding: 100px 0 80px;
  max-width: var(--container);
  margin: 0 auto;
  padding-left: calc(var(--folio-margin) + 24px);
  padding-right: 48px;
}
.preface-grid {
  display: grid;
  grid-template-columns: 180px 1fr 180px;
  gap: 60px;
  align-items: start;
}
.preface-tag {
  font-family: var(--font-display);
  font-size: 13.5px;
  letter-spacing: 8px;
  color: var(--cinnabar);
  writing-mode: vertical-rl;
  padding-top: 40px;
}
.preface-tag::before {
  content: '';
  display: block;
  width: 1px; height: 36px;
  background: var(--cinnabar);
  margin: 0 auto 20px;
}
.preface-body {
  font-family: var(--font-display);
  font-size: 17.5px;
  line-height: 2.2;
  color: var(--ink-soft);
  max-width: 620px;
  letter-spacing: 0.04em;
}
.preface-body p:first-child::first-letter {
  font-family: var(--font-display);
  float: left;
  font-size: 5.2em;
  line-height: 0.95;
  margin: 0.08em 0.14em 0 -0.04em;
  color: var(--cinnabar);
  font-weight: 700;
}
.preface-body p + p { margin-top: 1.3em; }
.preface-body em {
  font-style: normal;
  color: var(--ink);
  font-weight: 600;
  background: linear-gradient(transparent 62%, var(--gold-soft) 62%, var(--gold-soft) 88%, transparent 88%);
  padding: 0 2px;
}
.preface-sign {
  font-family: var(--font-display);
  font-size: 12.5px;
  letter-spacing: 4px;
  color: var(--ink-muted);
  text-align: right;
  padding-top: 40px;
}
.preface-sign .cite {
  display: block;
  font-family: var(--font-latin);
  font-style: italic;
  font-size: 11px;
  letter-spacing: 2px;
  margin-top: 4px;
  color: var(--ink-ghost);
}

/* ============================================================
   PROBLEMS — 三断层, editorial column layout
   ============================================================ */
.problems {
  max-width: var(--container);
  margin: 0 auto;
  padding-left: calc(var(--folio-margin) + 24px);
  padding-right: 48px;
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: 24px;
}
.problem {
  padding: 32px 0 24px;
  border-top: 0.5px solid var(--ink);
  position: relative;
}
.problem:nth-child(1) { grid-column: 1 / 5; }
.problem:nth-child(2) { grid-column: 5 / 9; margin-top: 80px; }
.problem:nth-child(3) { grid-column: 9 / 13; margin-top: 40px; }
.problem-num {
  position: absolute;
  top: -20px;
  left: 0;
  background: var(--paper);
  padding: 0 12px 0 0;
  font-family: var(--font-latin);
  font-style: italic;
  font-weight: 500;
  font-size: 14px;
  letter-spacing: 4px;
  color: var(--cinnabar);
  text-transform: uppercase;
}
.problem h3 {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 24px;
  line-height: 1.4;
  letter-spacing: 2px;
  margin-bottom: 18px;
  color: var(--ink);
}
.problem p {
  font-family: var(--font-display);
  font-size: 15.5px;
  line-height: 2;
  color: var(--ink-soft);
  letter-spacing: 0.02em;
}
.problem .pull {
  display: block;
  font-family: var(--font-display);
  font-size: 22px;
  color: var(--cinnabar);
  line-height: 1.6;
  font-weight: 500;
  letter-spacing: 4px;
  margin-top: 24px;
  padding-top: 20px;
  border-top: 0.5px dashed var(--cinnabar);
}

/* ============================================================
   METHOD — 三层递进, numbered ink markers
   ============================================================ */
.method-flow {
  max-width: var(--container);
  margin: 0 auto;
  padding-left: calc(var(--folio-margin) + 24px);
  padding-right: 48px;
  display: grid;
  gap: 60px;
}
.method-step {
  display: grid;
  grid-template-columns: 160px 1fr 220px;
  gap: 60px;
  align-items: start;
  padding: 40px 0;
  border-bottom: 0.5px solid rgba(26, 21, 18, 0.12);
  position: relative;
}
.method-step:last-child { border-bottom: none; }

.step-marker {
  text-align: right;
  padding-top: 8px;
}
.step-marker .big {
  font-family: var(--font-display);
  font-size: 108px;
  line-height: 0.85;
  font-weight: 300;
  color: var(--cinnabar);
  letter-spacing: -0.04em;
}
.step-marker .en {
  display: block;
  font-family: var(--font-latin);
  font-style: italic;
  font-size: 14px;
  letter-spacing: 4px;
  color: var(--ink-muted);
  margin-top: 10px;
  text-transform: uppercase;
}

.step-body h3 {
  font-family: var(--font-display);
  font-size: 28px;
  font-weight: 600;
  letter-spacing: 8px;
  margin-bottom: 20px;
  color: var(--ink);
}
.step-body p {
  font-family: var(--font-display);
  font-size: 16px;
  line-height: 2;
  color: var(--ink-soft);
  letter-spacing: 0.02em;
  max-width: 620px;
}
.step-body .tech {
  margin-top: 24px;
  display: inline-flex;
  flex-wrap: wrap;
  gap: 6px 18px;
  font-family: var(--font-latin);
  font-size: 13px;
  font-style: italic;
  color: var(--ink-muted);
  letter-spacing: 1px;
}
.step-body .tech span::before { content: '— '; color: var(--cinnabar); }

.step-diagram {
  padding: 20px;
  background: linear-gradient(135deg, rgba(168, 50, 46, 0.02), rgba(47, 74, 51, 0.02));
  border: 0.5px solid var(--ink);
  position: relative;
}
.step-diagram::before,
.step-diagram::after {
  content: '';
  position: absolute;
  width: 10px; height: 10px;
  background: var(--paper);
  border: 0.5px solid var(--ink);
}
.step-diagram::before { top: -5px; left: -5px; }
.step-diagram::after { bottom: -5px; right: -5px; }
.step-diagram svg { width: 100%; height: auto; display: block; }
.step-diagram-caption {
  margin-top: 10px;
  font-family: var(--font-latin);
  font-style: italic;
  font-size: 11.5px;
  letter-spacing: 1.5px;
  color: var(--ink-muted);
  text-align: center;
}

/* ============================================================
   CAPABILITIES — 六项能事, asymmetric with floating plates
   ============================================================ */
.capabilities {
  max-width: var(--container);
  margin: 0 auto;
  padding-left: calc(var(--folio-margin) + 24px);
  padding-right: 48px;
  display: grid;
  grid-template-columns: 1.05fr 1fr;
  gap: 80px;
  align-items: start;
}

.cap-list {
  list-style: none;
  counter-reset: cap;
  display: grid;
  gap: 4px;
}
.cap-list li {
  counter-increment: cap;
  padding: 26px 4px;
  border-bottom: 0.5px solid rgba(26, 21, 18, 0.15);
  position: relative;
  cursor: default;
  transition: background 0.3s, padding-left 0.3s;
}
.cap-list li:hover {
  background: var(--cinnabar-sft);
  padding-left: 12px;
}
.cap-list li::before {
  content: counter(cap, cjk-ideographic);
  position: absolute;
  left: -32px;
  top: 28px;
  font-family: var(--font-display);
  font-size: 20px;
  color: var(--cinnabar);
  font-weight: 500;
  letter-spacing: 2px;
}
.cap-list h4 {
  font-family: var(--font-display);
  font-size: 21px;
  font-weight: 600;
  letter-spacing: 3px;
  margin-bottom: 8px;
  color: var(--ink);
  display: flex;
  align-items: center;
  gap: 14px;
}
.cap-list h4 .en {
  font-family: var(--font-latin);
  font-style: italic;
  font-weight: 500;
  font-size: 13px;
  letter-spacing: 2px;
  color: var(--ink-ghost);
  text-transform: lowercase;
}
.cap-list p {
  font-family: var(--font-display);
  font-size: 14.5px;
  line-height: 1.9;
  color: var(--ink-soft);
  letter-spacing: 0.02em;
}

.cap-plates {
  position: sticky;
  top: 120px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
  padding: 8px;
}
.plate {
  background: var(--paper);
  padding: 18px;
  border: 0.5px solid var(--ink);
  box-shadow: var(--shadow-leaf);
  position: relative;
  transition: transform 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}
.plate:nth-child(1) { transform: rotate(-1.2deg) translateY(0); }
.plate:nth-child(2) { transform: rotate(0.8deg) translateY(24px); }
.plate:nth-child(3) { transform: rotate(0.6deg) translateY(-16px); }
.plate:nth-child(4) { transform: rotate(-0.9deg) translateY(12px); }
.plate:hover { transform: rotate(0) translateY(-4px) scale(1.02); z-index: 2; }

.plate-label {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-family: var(--font-latin);
  font-style: italic;
  font-size: 10px;
  letter-spacing: 3px;
  color: var(--ink-muted);
  text-transform: uppercase;
  padding-bottom: 8px;
  border-bottom: 0.5px solid rgba(26, 21, 18, 0.2);
  margin-bottom: 12px;
}
.plate-label .n {
  color: var(--cinnabar);
  font-weight: 500;
}
.plate-title {
  font-family: var(--font-display);
  font-size: 13px;
  letter-spacing: 4px;
  font-weight: 600;
  color: var(--ink);
  margin-bottom: 12px;
}
.plate svg { display: block; width: 100%; height: auto; }

/* ============================================================
   ACADEMIC — 典據, footnote-style citations
   ============================================================ */
.citations {
  max-width: var(--container);
  margin: 0 auto;
  padding-left: calc(var(--folio-margin) + 24px);
  padding-right: 48px;
  display: grid;
  gap: 40px;
  margin-bottom: 72px;
  position: relative;
}
.citations::before {
  content: '';
  position: absolute;
  left: calc(var(--folio-margin) + 44px);
  top: 20px;
  bottom: 20px;
  width: 0.5px;
  background: var(--ink);
  opacity: 0.25;
}
.citation {
  display: grid;
  grid-template-columns: 40px 1fr 2fr;
  gap: 40px;
  align-items: baseline;
  padding-left: 40px;
  position: relative;
}
.cit-num {
  font-family: var(--font-latin);
  font-style: italic;
  font-size: 22px;
  color: var(--cinnabar);
  font-weight: 500;
}
.cit-num::before {
  content: '';
  display: block;
  width: 10px; height: 10px;
  border: 1px solid var(--cinnabar);
  background: var(--paper);
  transform: rotate(45deg);
  margin-bottom: 12px;
  margin-left: -5px;
}
.cit-title {
  font-family: var(--font-display);
  font-size: 22px;
  font-weight: 600;
  color: var(--ink);
  line-height: 1.5;
  letter-spacing: 2px;
}
.cit-title .cite-en {
  display: block;
  font-family: var(--font-latin);
  font-style: italic;
  font-size: 14px;
  font-weight: 400;
  color: var(--ink-muted);
  letter-spacing: 1px;
  margin-top: 8px;
}
.cit-title .cite-src {
  display: block;
  font-family: var(--font-display);
  font-size: 12.5px;
  font-weight: 400;
  color: var(--ink-muted);
  letter-spacing: 3px;
  margin-top: 6px;
}
.cit-body {
  font-family: var(--font-display);
  font-size: 15px;
  line-height: 2;
  color: var(--ink-soft);
  letter-spacing: 0.02em;
}

/* Compliance block */
.compliance {
  max-width: var(--container);
  margin: 0 auto;
  padding-left: calc(var(--folio-margin) + 24px);
  padding-right: 48px;
  display: grid;
  grid-template-columns: 160px 1fr;
  gap: 48px;
  align-items: start;
  padding-top: 60px;
  border-top: 0.5px solid var(--ink);
}
.compliance-label {
  position: relative;
  padding-top: 8px;
}
.compliance-label svg { width: 100%; max-width: 120px; }
.compliance-label .label {
  display: block;
  font-family: var(--font-display);
  font-size: 12.5px;
  letter-spacing: 6px;
  color: var(--ink-muted);
  margin-top: 12px;
}
.compliance-list {
  list-style: none;
  counter-reset: rule;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px 60px;
}
.compliance-list li {
  counter-increment: rule;
  padding-left: 36px;
  position: relative;
  font-family: var(--font-display);
  font-size: 14.5px;
  line-height: 1.9;
  color: var(--ink-soft);
}
.compliance-list li::before {
  content: counter(rule, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 0;
  font-family: var(--font-latin);
  font-style: italic;
  font-size: 13px;
  letter-spacing: 1px;
  color: var(--cinnabar);
  background: var(--paper);
  padding-right: 8px;
}
.compliance-list strong {
  display: block;
  font-family: var(--font-display);
  font-size: 15.5px;
  color: var(--ink);
  letter-spacing: 1px;
  font-weight: 600;
  margin-bottom: 4px;
}

/* ============================================================
   TEAM — 同仁, portrait-like cards
   ============================================================ */
.team {
  max-width: var(--container);
  margin: 0 auto;
  padding-left: calc(var(--folio-margin) + 24px);
  padding-right: 48px;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 48px;
}
.member {
  display: flex;
  flex-direction: column;
  gap: 0;
  padding: 0;
}
.portrait {
  aspect-ratio: 3/4;
  background: linear-gradient(145deg, var(--paper-deep), var(--paper-dark));
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 140px;
  color: var(--ink);
  letter-spacing: 0;
  position: relative;
  overflow: hidden;
  margin-bottom: 20px;
  box-shadow: var(--shadow-leaf);
}
.portrait::before {
  content: '';
  position: absolute;
  inset: 10px;
  border: 0.5px solid rgba(26, 21, 18, 0.2);
  pointer-events: none;
}
.portrait::after {
  content: attr(data-en);
  position: absolute;
  bottom: 16px; left: 16px;
  font-family: var(--font-latin);
  font-style: italic;
  font-size: 12px;
  letter-spacing: 2px;
  color: var(--ink-muted);
  text-transform: uppercase;
}
.member.advisor .portrait { background: linear-gradient(145deg, #EFDCC0, #E2C89E); }
.member.advisor .portrait > span { color: var(--cinnabar); }

.mem-name {
  font-family: var(--font-display);
  font-size: 26px;
  font-weight: 600;
  letter-spacing: 6px;
  color: var(--ink);
  margin-bottom: 4px;
}
.mem-role {
  font-family: var(--font-latin);
  font-style: italic;
  font-size: 13px;
  letter-spacing: 2px;
  color: var(--cinnabar);
  margin-bottom: 14px;
  text-transform: uppercase;
}
.mem-desc {
  font-family: var(--font-display);
  font-size: 14.5px;
  line-height: 1.9;
  color: var(--ink-soft);
  letter-spacing: 0.02em;
}

.team-sub {
  max-width: var(--container);
  margin: 48px auto 0;
  padding-left: calc(var(--folio-margin) + 24px);
  padding-right: 48px;
  text-align: center;
  font-family: var(--font-display);
  font-size: 13px;
  letter-spacing: 4px;
  color: var(--ink-muted);
  padding-top: 36px;
  border-top: 0.5px dashed rgba(26, 21, 18, 0.2);
}

/* ============================================================
   ROADMAP — 紀年, bamboo scroll three-phase
   ============================================================ */
.scroll-row {
  max-width: var(--container);
  margin: 0 auto;
  padding-left: calc(var(--folio-margin) + 24px);
  padding-right: 48px;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0;
  position: relative;
}
.scroll-row::before {
  content: '';
  position: absolute;
  left: calc(var(--folio-margin) + 24px);
  right: 48px;
  top: 80px;
  height: 0.5px;
  background: var(--ink);
  opacity: 0.3;
}
.phase {
  padding: 40px 32px;
  border-right: 0.5px solid rgba(26, 21, 18, 0.2);
  position: relative;
}
.phase:last-child { border-right: none; }
.phase::before {
  content: '';
  position: absolute;
  top: 74px;
  left: 30px;
  width: 14px;
  height: 14px;
  background: var(--paper);
  border: 1px solid var(--ink);
  border-radius: 50%;
  z-index: 2;
}
.phase.past::before { background: var(--cinnabar); border-color: var(--cinnabar); }
.phase.now::before { background: var(--gold); border-color: var(--gold); }
.phase-era {
  font-family: var(--font-latin);
  font-style: italic;
  font-size: 12px;
  letter-spacing: 3px;
  color: var(--ink-muted);
  text-transform: uppercase;
  margin-bottom: 8px;
}
.phase-era .n {
  font-family: var(--font-display);
  font-style: normal;
  font-weight: 500;
  color: var(--cinnabar);
  margin-right: 8px;
  font-size: 14px;
}
.phase.now .phase-era .n { color: var(--gold); }
.phase-name {
  font-family: var(--font-display);
  font-size: 26px;
  font-weight: 600;
  letter-spacing: 6px;
  color: var(--ink);
  padding-top: 36px;
  margin-bottom: 24px;
}
.phase-list {
  list-style: none;
  display: grid;
  gap: 12px;
}
.phase-list li {
  font-family: var(--font-display);
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--ink-soft);
  padding-left: 20px;
  position: relative;
  letter-spacing: 0.02em;
}
.phase-list li::before {
  content: '';
  position: absolute;
  left: 4px; top: 12px;
  width: 4px; height: 4px;
  background: var(--ink-muted);
  border-radius: 50%;
}
.phase.past .phase-list li::before { background: var(--cinnabar); }
.phase.now .phase-list li::before { background: var(--gold); }

/* Partners */
.partners {
  max-width: var(--container);
  margin: 80px auto 0;
  padding-left: calc(var(--folio-margin) + 24px);
  padding-right: 48px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
}
.partner {
  padding: 40px 44px;
  background: linear-gradient(180deg, var(--paper-deep), var(--paper));
  border: 0.5px solid var(--ink);
  position: relative;
}
.partner::before {
  content: '';
  position: absolute;
  top: 14px; left: 14px; right: 14px; bottom: 14px;
  border: 0.5px solid rgba(26, 21, 18, 0.2);
  pointer-events: none;
}
.partner-seal {
  display: inline-block;
  padding: 6px 14px;
  background: var(--cinnabar);
  color: var(--paper);
  font-family: var(--font-display);
  font-size: 12px;
  letter-spacing: 5px;
  font-weight: 500;
  margin-bottom: 22px;
  transform: rotate(-1deg);
  box-shadow: var(--shadow-seal);
}
.partner h3 {
  font-family: var(--font-display);
  font-size: 24px;
  font-weight: 600;
  letter-spacing: 3px;
  margin-bottom: 18px;
  color: var(--ink);
}
.partner p {
  font-family: var(--font-display);
  font-size: 15px;
  line-height: 2;
  color: var(--ink-soft);
  letter-spacing: 0.02em;
}
.partner strong {
  color: var(--cinnabar);
  font-weight: 600;
}

/* ============================================================
   PLANS — 券方, vertical 对联 scrolls
   ============================================================ */
.scrolls {
  max-width: var(--container);
  margin: 0 auto;
  padding-left: calc(var(--folio-margin) + 24px);
  padding-right: 48px;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}
.plan-scroll {
  padding: 44px 36px 40px;
  background: linear-gradient(180deg, var(--paper) 0%, var(--paper-deep) 100%);
  border: 0.5px solid var(--ink);
  position: relative;
  transition: transform 0.4s cubic-bezier(0.16, 1, 0.3, 1), box-shadow 0.4s;
}
.plan-scroll::before,
.plan-scroll::after {
  content: '';
  position: absolute;
  left: 16px; right: 16px;
  height: 0.5px;
  background: var(--ink);
  opacity: 0.2;
}
.plan-scroll::before { top: 12px; }
.plan-scroll::after { bottom: 12px; }
.plan-scroll:hover {
  transform: translateY(-6px) rotate(-0.3deg);
  box-shadow: 0 16px 32px rgba(26, 21, 18, 0.12);
}
.plan-scroll.featured {
  background: linear-gradient(180deg, #FBF5E0 0%, #F5EFD0 100%);
  border-color: var(--gold);
}
.plan-seal {
  position: absolute;
  top: -14px; right: 24px;
  padding: 6px 16px;
  background: var(--cinnabar);
  color: var(--paper);
  font-family: var(--font-display);
  font-size: 12px;
  letter-spacing: 5px;
  font-weight: 500;
  transform: rotate(4deg);
  box-shadow: var(--shadow-seal);
}
.plan-name {
  font-family: var(--font-display);
  font-size: 22px;
  font-weight: 600;
  letter-spacing: 8px;
  color: var(--ink);
  margin-bottom: 4px;
}
.plan-intro {
  font-family: var(--font-latin);
  font-style: italic;
  font-size: 12px;
  letter-spacing: 2px;
  color: var(--ink-muted);
  margin-bottom: 28px;
  text-transform: uppercase;
}
.plan-price {
  font-family: var(--font-display);
  font-weight: 300;
  color: var(--ink);
  line-height: 1;
  margin-bottom: 6px;
}
.plan-price .yuan {
  font-family: var(--font-display);
  font-size: 18px;
  color: var(--ink-muted);
  margin-right: 6px;
  vertical-align: 14px;
  font-weight: 400;
}
.plan-price .amt {
  font-size: 64px;
  font-weight: 300;
  letter-spacing: -0.02em;
}
.plan-scroll.featured .plan-price .amt { color: var(--cinnabar); }
.plan-price .unit {
  font-family: var(--font-display);
  font-size: 14px;
  color: var(--ink-muted);
  margin-left: 6px;
  letter-spacing: 2px;
}
.plan-period {
  font-family: var(--font-display);
  font-size: 12.5px;
  letter-spacing: 4px;
  color: var(--ink-muted);
  padding-bottom: 24px;
  border-bottom: 0.5px dashed rgba(26, 21, 18, 0.2);
  margin-bottom: 24px;
}
.plan-features {
  list-style: none;
  display: grid;
  gap: 10px;
  margin-bottom: 32px;
  min-height: 200px;
}
.plan-features li {
  font-family: var(--font-display);
  font-size: 14px;
  line-height: 1.7;
  color: var(--ink-soft);
  padding-left: 22px;
  position: relative;
  letter-spacing: 0.02em;
}
.plan-features li::before {
  content: '·';
  position: absolute;
  left: 4px; top: -1px;
  color: var(--cinnabar);
  font-weight: 700;
  font-size: 18px;
}
.plan-action {
  font-family: var(--font-display);
  font-size: 13px;
  letter-spacing: 6px;
  padding: 12px 20px;
  display: block;
  text-align: center;
  border: 0.5px solid var(--ink);
  color: var(--ink);
  transition: all 0.3s;
}
.plan-action:hover {
  background: var(--ink);
  color: var(--paper);
  transform: translate(-2px, -2px);
  box-shadow: 3px 3px 0 var(--cinnabar);
}
.plan-scroll.featured .plan-action {
  background: var(--ink);
  color: var(--paper);
}
.plan-scroll.featured .plan-action:hover {
  background: var(--cinnabar);
  box-shadow: 3px 3px 0 var(--gold);
  color: var(--paper);
}

/* Revenue streams */
.revenue {
  max-width: var(--container);
  margin: 72px auto 0;
  padding-left: calc(var(--folio-margin) + 24px);
  padding-right: 48px;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0;
  border-top: 0.5px solid var(--ink);
  border-bottom: 0.5px solid var(--ink);
  padding-top: 32px;
  padding-bottom: 32px;
}
.stream {
  padding: 0 32px;
  border-right: 0.5px dashed rgba(26, 21, 18, 0.25);
}
.stream:last-child { border-right: none; }
.stream .idx {
  font-family: var(--font-latin);
  font-style: italic;
  font-size: 13px;
  letter-spacing: 3px;
  color: var(--gold);
  margin-bottom: 6px;
  text-transform: uppercase;
}
.stream .idx .num {
  font-family: var(--font-display);
  font-style: normal;
  font-weight: 500;
  font-size: 16px;
  color: var(--cinnabar);
  margin-right: 8px;
}
.stream h5 {
  font-family: var(--font-display);
  font-size: 19px;
  font-weight: 600;
  letter-spacing: 4px;
  margin-bottom: 10px;
  color: var(--ink);
}
.stream p {
  font-family: var(--font-display);
  font-size: 14px;
  line-height: 1.8;
  color: var(--ink-soft);
  letter-spacing: 0.02em;
}

/* ============================================================
   CLOSING — 尾声, classical quote + CTA
   ============================================================ */
.closing {
  padding: 140px 0 120px;
  position: relative;
  text-align: center;
}
.closing-quote {
  font-family: var(--font-display);
  font-size: 40px;
  font-weight: 300;
  line-height: 1.8;
  letter-spacing: 16px;
  color: var(--ink);
  margin-bottom: 28px;
  padding: 0 48px;
}
.closing-quote em {
  font-style: normal;
  color: var(--cinnabar);
  font-weight: 500;
}
.closing-attrib {
  font-family: var(--font-display);
  font-size: 13px;
  letter-spacing: 8px;
  color: var(--ink-muted);
  margin-bottom: 64px;
}
.closing-attrib::before {
  content: '—　';
  color: var(--cinnabar);
}
.closing-cta {
  display: inline-flex;
  gap: 16px;
  flex-wrap: wrap;
  justify-content: center;
}

.closing-seal {
  display: inline-block;
  margin-bottom: 44px;
}

/* ============================================================
   COLOPHON / FOOTER
   ============================================================ */
.colophon {
  background: var(--ink);
  color: var(--paper-deep);
  padding: 80px 0 40px;
  border-top: 2px solid var(--cinnabar);
  position: relative;
}
.colophon::before {
  content: '';
  position: absolute;
  left: 0; right: 0; top: 8px;
  height: 0.5px;
  background: var(--cinnabar);
  opacity: 0.5;
}
.colophon-inner {
  max-width: var(--container);
  margin: 0 auto;
  padding-left: calc(var(--folio-margin) + 24px);
  padding-right: 48px;
}
.colophon-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 48px;
  padding-bottom: 40px;
  border-bottom: 0.5px solid rgba(242, 235, 215, 0.15);
}
.colophon-brand {
  display: flex;
  gap: 20px;
  align-items: start;
}
.colophon-brand svg {
  flex-shrink: 0;
  width: 48px; height: 48px;
}
.brand-name {
  font-family: var(--font-display);
  font-size: 22px;
  font-weight: 700;
  letter-spacing: 8px;
  color: var(--paper);
  margin-bottom: 6px;
}
.brand-en {
  font-family: var(--font-latin);
  font-style: italic;
  font-size: 12px;
  letter-spacing: 2px;
  color: var(--paper-dark);
  margin-bottom: 16px;
}
.colophon-brand p {
  font-family: var(--font-display);
  font-size: 13px;
  line-height: 1.9;
  color: var(--paper-dark);
  letter-spacing: 0.02em;
  max-width: 320px;
}

.colophon h5 {
  font-family: var(--font-display);
  font-size: 13px;
  letter-spacing: 6px;
  color: var(--paper);
  font-weight: 500;
  margin-bottom: 18px;
  padding-bottom: 10px;
  border-bottom: 0.5px solid rgba(242, 235, 215, 0.2);
}
.colophon ul {
  list-style: none;
  display: grid;
  gap: 10px;
}
.colophon ul li {
  font-family: var(--font-display);
  font-size: 13px;
  letter-spacing: 2px;
  color: var(--paper-dark);
  line-height: 1.7;
}
.colophon ul a {
  color: var(--paper-dark);
  transition: color 0.3s;
}
.colophon ul a:hover { color: var(--gold-soft); }
.colophon-contact li strong {
  display: block;
  font-family: var(--font-latin);
  font-style: italic;
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 1.5px;
  color: var(--ink-ghost);
  margin-bottom: 2px;
}

.colophon-footer {
  padding-top: 28px;
  text-align: center;
  font-family: var(--font-display);
  font-size: 12px;
  line-height: 2;
  color: var(--ink-ghost);
  letter-spacing: 2px;
}
.colophon-footer .sep {
  color: var(--cinnabar);
  padding: 0 10px;
  opacity: 0.7;
}
.colophon-disclaimer {
  margin-top: 10px;
  font-size: 11px;
  letter-spacing: 1px;
  line-height: 1.9;
  color: var(--ink-ghost);
  opacity: 0.8;
  max-width: 680px;
  margin-left: auto;
  margin-right: auto;
}

/* ============================================================
   REVEAL ANIMATIONS (IntersectionObserver-driven)
   ============================================================ */
.fade-up {
  opacity: 0;
  transform: translateY(32px);
  transition: opacity 1s cubic-bezier(0.16, 1, 0.3, 1), transform 1s cubic-bezier(0.16, 1, 0.3, 1);
}
.fade-up.in-view {
  opacity: 1;
  transform: translateY(0);
}
.fade-up.delay-1 { transition-delay: 0.1s; }
.fade-up.delay-2 { transition-delay: 0.2s; }
.fade-up.delay-3 { transition-delay: 0.3s; }
.fade-up.delay-4 { transition-delay: 0.4s; }

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (max-width: 1040px) {
  :root { --folio-margin: 40px; }
  .folio-links { display: none; }
  .hero-grid {
    grid-template-columns: auto 1fr;
    gap: 48px;
  }
  .hero-colophon { grid-column: 1 / -1; flex-direction: row; justify-content: center; margin-top: 48px; }
  .vertical-title { font-size: 72px; min-height: 460px; }
  .display-line { font-size: 40px; }
  .problems { grid-template-columns: 1fr; gap: 0; }
  .problems .problem,
  .problems .problem:nth-child(2),
  .problems .problem:nth-child(3) { grid-column: 1 / -1; margin-top: 0; padding: 32px 0; }
  .method-step { grid-template-columns: 80px 1fr; gap: 32px; }
  .step-diagram { grid-column: 1 / -1; margin-top: 16px; }
  .step-marker .big { font-size: 72px; }
  .capabilities { grid-template-columns: 1fr; gap: 48px; }
  .cap-plates { position: static; }
  .citation { grid-template-columns: 40px 1fr; }
  .cit-body { grid-column: 2 / -1; }
  .team { grid-template-columns: 1fr 1fr; gap: 32px; }
  .compliance { grid-template-columns: 1fr; gap: 24px; }
  .compliance-list { grid-template-columns: 1fr; }
  .scroll-row { grid-template-columns: 1fr; }
  .scroll-row::before { display: none; }
  .phase { border-right: none; border-bottom: 0.5px solid rgba(26, 21, 18, 0.15); }
  .partners { grid-template-columns: 1fr; }
  .scrolls { grid-template-columns: 1fr; gap: 28px; }
  .revenue { grid-template-columns: 1fr; gap: 28px; padding: 32px 20px; }
  .stream { border-right: none; border-bottom: 0.5px dashed rgba(26, 21, 18, 0.2); padding: 0 0 24px; }
  .stream:last-child { border-bottom: none; padding-bottom: 0; }
  .colophon-grid { grid-template-columns: 1fr 1fr; }
  .chapter-num { font-size: 80px; }
  .chapter-title { font-size: 28px; letter-spacing: 10px; }
  .closing-quote { font-size: 28px; letter-spacing: 8px; padding: 0 24px; }
}

@media (max-width: 640px) {
  :root { --folio-margin: 24px; }
  body { font-size: 15px; }
  .folio-nav-inner { padding: 16px 20px 16px 40px; grid-template-columns: 1fr auto; }
  .folio-brand-sub { display: none; }
  .hero { min-height: auto; padding: 40px 0 80px; }
  .hero-watermark { display: none; }
  .hero-grid { padding-left: 40px; padding-right: 20px; grid-template-columns: 1fr; }
  .vertical-title { writing-mode: horizontal-tb; font-size: 40px; min-height: 0; letter-spacing: 6px; }
  .seal-stamp { position: static; width: 72px; height: 72px; margin-top: 20px; }
  .vertical-rule { display: none; }
  .display-line { font-size: 30px; letter-spacing: 1px; }
  .hero-body { font-size: 15px; }
  .hero-epigram { font-size: 14px; letter-spacing: 4px; }
  .hero-colophon { flex-direction: column; gap: 14px; margin-top: 32px; }
  .chapter { padding: 72px 0 40px; }
  .chapter-head { grid-template-columns: auto 1fr; gap: 16px; margin-bottom: 40px; }
  .chapter-num { font-size: 56px; }
  .chapter-title { font-size: 22px; letter-spacing: 8px; padding-bottom: 6px; }
  .chapter-sub { display: none; }
  .preface, .problems, .method-flow, .capabilities, .citations, .compliance, .team, .team-sub, .scroll-row, .partners, .scrolls, .revenue, .colophon-inner {
    padding-left: 40px; padding-right: 20px;
  }
  .preface-grid { grid-template-columns: 1fr; gap: 20px; }
  .preface-tag, .preface-sign { writing-mode: horizontal-tb; text-align: left; }
  .method-step { grid-template-columns: 1fr; gap: 16px; padding: 28px 0; }
  .step-body h3 { font-size: 22px; letter-spacing: 4px; }
  .cap-list h4 { font-size: 18px; }
  .cit-title { font-size: 18px; }
  .cit-body { font-size: 14px; }
  .team { grid-template-columns: 1fr; }
  .portrait { font-size: 100px; }
  .plan-price .amt { font-size: 52px; }
  .closing { padding: 80px 0 60px; }
  .closing-quote { font-size: 22px; letter-spacing: 6px; line-height: 2; }
  .colophon-grid { grid-template-columns: 1fr; gap: 32px; }
}

/* ============================================================
   ACCESSIBILITY
   ============================================================ */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation: none !important;
    transition: none !important;
    scroll-behavior: auto !important;
  }
  .fade-up { opacity: 1; transform: none; }
  .hero-horizontal > *, .hero-vertical, .hero-colophon, .seal-stamp { opacity: 1; transform: none; }
}

@media print {
  body { background: white; color: black; }
  .folio-nav, .hero-colophon, .closing-cta, .ink-btn { display: none; }
  .chapter { page-break-inside: avoid; }
}

::selection {
  background: var(--cinnabar);
  color: var(--paper);
}