/* =====================================================
   江南布衣 · 关于
   Visual: bone-white archival, JNBY DNA
   ===================================================== */

:root {
  /* color */
  --bone:        #F5F1EA;
  --paper:       #EAE4D8;
  --ink:         #1A1A1A;
  --ink-2:       #5C5751;
  --ink-3:       #8A847B;
  --line:        #D8D2C5;
  --accent:      #A6896E;       /* clay - only warm accent */
  --accent-ink:  #0E0E0E;

  /* fonts */
  --serif-en:    "Cormorant Garamond", "EB Garamond", Georgia, serif;
  --sans-en:     "Inter", -apple-system, BlinkMacSystemFont, sans-serif;
  --mono:        "JetBrains Mono", "IBM Plex Mono", Courier, monospace;
  --serif-cn:    "Noto Serif SC", "Source Han Serif SC", "Songti SC", serif;
  --sans-cn:     "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;

  /* layout */
  --max-w:       1280px;
  --pad-side:    clamp(20px, 4vw, 56px);
  --pad-section: clamp(72px, 14vh, 160px);
  --gutter:      32px;

  /* easing */
  --ease:        cubic-bezier(.2, .7, .2, 1);
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bone);
  color: var(--ink);
  font-family: var(--sans-cn);
  font-weight: 400;
  font-size: 16px;
  line-height: 1.85;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

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

a {
  color: var(--ink);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color .28s var(--ease), color .28s var(--ease);
}
a:hover { border-bottom-color: var(--accent); color: var(--accent); }

::selection { background: var(--accent); color: var(--bone); }


/* ===== NAV ===== */

.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 50;
  background: color-mix(in srgb, var(--bone) 88%, transparent);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
}

.nav-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 14px var(--pad-side);
  display: flex;
  align-items: center;
  gap: 24px;
}

.nav-mark {
  font-family: var(--serif-en);
  font-weight: 400;
  font-size: 16px;
  letter-spacing: 0.14em;
  border: none;
  display: inline-flex;
  align-items: baseline;
  gap: 10px;
}
.nav-mark-cn {
  font-family: var(--serif-cn);
  font-size: 13px;
  font-weight: 300;
  color: var(--ink-2);
  letter-spacing: 0.2em;
}

.nav-list {
  list-style: none;
  margin: 0; padding: 0;
  display: flex;
  gap: 28px;
  margin-left: auto;
}
.nav-list a {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--ink-2);
  border: none;
}
.nav-list a:hover { color: var(--accent); }

.nav-meta {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--ink-2);
  border: none;
  padding-left: 16px;
  border-left: 1px solid var(--line);
}

@media (max-width: 768px) {
  .nav-list { display: none; }
  .nav-inner { padding: 12px 20px; }
}


/* ===== HERO ===== */

.hero {
  min-height: 100vh;
  padding: 96px var(--pad-side) 56px;
  max-width: var(--max-w);
  margin: 0 auto;
  display: grid;
  grid-template-rows: auto 1fr auto auto;
  gap: 24px;
  position: relative;
}

.hero-meta-top {
  display: flex;
  flex-wrap: wrap;
  gap: clamp(16px, 3vw, 40px);
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--ink-2);
  padding-top: 32px;
}
.hero-meta-top span { white-space: nowrap; }

.hero-display {
  font-family: var(--serif-en);
  font-weight: 300;
  font-size: clamp(56px, 13vw, 180px);
  line-height: 0.92;
  letter-spacing: -0.01em;
  margin: 0;
  color: var(--accent-ink);
  align-self: center;
}
.hero-line {
  display: block;
}
.hero-line:nth-child(2) {
  padding-left: clamp(20px, 8vw, 100px);
  font-style: italic;
  font-weight: 300;
}

.hero-lede {
  font-family: var(--serif-cn);
  font-weight: 300;
  font-size: clamp(18px, 1.8vw, 24px);
  line-height: 1.65;
  color: var(--ink);
  max-width: 640px;
  margin: 0;
}

.hero-meta-bottom {
  display: flex;
  align-items: center;
  gap: 24px;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--ink-2);
}
.hero-meta-rule {
  flex: 1;
  height: 1px;
  background: var(--line);
}


/* ===== CHAPTERS — shared ===== */

.chapter {
  padding: var(--pad-section) var(--pad-side);
  max-width: var(--max-w);
  margin: 0 auto;
  position: relative;
}

.chapter + .chapter {
  border-top: 1px solid var(--line);
}

.chapter-head {
  max-width: 920px;
  margin: 0 auto 80px;
  display: grid;
  gap: 16px;
}
.chapter-mono {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--ink-3);
}
.chapter-title {
  font-family: var(--serif-cn);
  font-weight: 300;
  font-size: clamp(36px, 5vw, 64px);
  line-height: 1.1;
  letter-spacing: 0.02em;
  margin: 0;
  color: var(--accent-ink);
}
.chapter-lede {
  font-family: var(--serif-cn);
  font-weight: 300;
  font-size: clamp(18px, 1.6vw, 22px);
  line-height: 1.7;
  margin: 0;
  color: var(--ink);
  max-width: 640px;
}
.chapter-source {
  display: block;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--ink-3);
  margin-top: 12px;
}


/* ===== CHAPTER 01 · 沿革 / TIMELINE ===== */

.timeline {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 64px;
}

.timeline-item {
  display: grid;
  grid-template-columns: minmax(180px, 1fr) 2fr;
  gap: clamp(24px, 5vw, 80px);
  align-items: start;
  padding-top: 48px;
  border-top: 1px solid var(--line);
}
.timeline-item:first-child { border-top: none; padding-top: 0; }

.timeline-year {
  font-family: var(--serif-en);
  font-weight: 300;
  font-size: clamp(56px, 8vw, 120px);
  line-height: 0.95;
  color: var(--accent-ink);
  letter-spacing: -0.01em;
}

.timeline-body {
  display: grid;
  gap: 12px;
  padding-top: 12px;
}
.timeline-meta {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--ink-3);
}
.timeline-h {
  font-family: var(--serif-cn);
  font-weight: 400;
  font-size: clamp(20px, 2vw, 28px);
  line-height: 1.4;
  margin: 0;
  color: var(--ink);
}
.timeline-body p {
  margin: 0;
  font-family: var(--sans-cn);
  font-size: 15px;
  line-height: 1.85;
  color: var(--ink-2);
  max-width: 56ch;
}

@media (max-width: 768px) {
  .timeline-item {
    grid-template-columns: 1fr;
    gap: 16px;
  }
  .timeline-body { padding-top: 0; }
}


/* ===== CHAPTER 02 · 品牌矩阵 / BRAND STACK ===== */

.brand-stack {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0;
}

.brand-card {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(32px, 6vw, 80px);
  padding: 80px 0;
  border-top: 1px solid var(--line);
  align-items: center;
  position: relative;
  min-height: 60vh;
}
.brand-card:first-child { border-top: none; }
.brand-card:nth-child(even) {
  grid-template-columns: 1fr 1fr;
}
.brand-card:nth-child(even) .brand-figure { order: -1; }

.brand-meta {
  display: flex;
  align-items: baseline;
  gap: 20px;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--ink-3);
  margin-bottom: 24px;
}
.brand-no {
  color: var(--accent);
  font-weight: 500;
}

.brand-en {
  font-family: var(--serif-en);
  font-weight: 300;
  font-size: clamp(40px, 6vw, 88px);
  line-height: 1;
  letter-spacing: -0.005em;
  margin: 0;
  color: var(--accent-ink);
  word-break: break-word;
}
.brand-cn {
  font-family: var(--serif-cn);
  font-weight: 300;
  font-size: clamp(18px, 1.6vw, 22px);
  color: var(--ink-2);
  margin: 12px 0 24px;
  letter-spacing: 0.05em;
}
.brand-tag {
  font-family: var(--sans-cn);
  font-size: 15px;
  line-height: 1.85;
  color: var(--ink);
  margin: 0;
  max-width: 38ch;
}

.brand-figure {
  aspect-ratio: 4 / 5;
  background: var(--paper);
  border: 1px solid var(--line);
  position: relative;
  overflow: hidden;
}
.brand-figure::after {
  content: attr(data-figure);
  position: absolute;
  bottom: 12px;
  right: 14px;
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.22em;
  color: var(--ink-3);
  text-transform: uppercase;
}
.brand-figure::before {
  content: '';
  position: absolute;
  inset: 50% auto auto 50%;
  width: 40%;
  height: 1px;
  background: var(--line);
  transform: translate(-50%, -50%);
}

@media (max-width: 768px) {
  .brand-card,
  .brand-card:nth-child(even) {
    grid-template-columns: 1fr;
    padding: 56px 0;
    gap: 24px;
    min-height: 0;
  }
  .brand-card:nth-child(even) .brand-figure { order: 0; }
  .brand-figure { order: -1; }
}


/* ===== CHAPTER 03 · 设计哲学 / PILLARS ===== */

.philosophy-quote {
  margin: 0 0 96px;
  padding: 64px 0;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  text-align: left;
}
.philosophy-quote blockquote {
  font-family: var(--serif-en);
  font-weight: 300;
  font-style: normal;
  font-size: clamp(40px, 6vw, 96px);
  line-height: 1.05;
  margin: 0;
  color: var(--accent-ink);
  letter-spacing: -0.005em;
}
.philosophy-quote blockquote em {
  font-style: italic;
  color: var(--accent);
}
.philosophy-quote .quote-mark {
  color: var(--accent);
  font-size: 1.1em;
  margin-right: 0.1em;
}
.philosophy-quote figcaption {
  margin-top: 24px;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--ink-3);
}

.pillar-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: clamp(32px, 5vw, 64px);
  margin-bottom: 96px;
}

.pillar {
  display: grid;
  gap: 20px;
  padding-top: 40px;
  border-top: 1px solid var(--line);
}
.pillar-no {
  font-family: var(--serif-en);
  font-style: italic;
  font-weight: 300;
  font-size: 36px;
  color: var(--accent);
  line-height: 1;
}
.pillar-h {
  font-family: var(--serif-cn);
  font-weight: 400;
  font-size: clamp(24px, 2.4vw, 32px);
  line-height: 1.3;
  margin: 0;
  color: var(--ink);
  letter-spacing: 0.04em;
}
.pillar p {
  margin: 0;
  font-family: var(--sans-cn);
  font-size: 15px;
  line-height: 1.85;
  color: var(--ink-2);
}

@media (max-width: 768px) {
  .pillar-grid { grid-template-columns: 1fr; gap: 40px; }
}

.philosophy-figure {
  margin: 0;
  position: relative;
}
.philosophy-figure-img {
  width: 100%;
  aspect-ratio: 16 / 7;
  background: var(--paper);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  position: relative;
}
.philosophy-figure-img::before {
  content: '';
  position: absolute;
  inset: 50% auto auto 50%;
  width: 80px;
  height: 1px;
  background: var(--line);
  transform: translate(-50%, -50%);
}
.philosophy-figure-cap {
  position: absolute;
  right: 16px;
  bottom: 16px;
  background: var(--bone);
  padding: 8px 14px;
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--ink-3);
  border: 1px solid var(--line);
}


/* ===== CHAPTER 04 · 艺术 × 时装 / GALLERY ===== */

.art-rail-wrap {
  position: relative;
  margin: 0 calc(-1 * var(--pad-side));
}

.art-rail {
  list-style: none;
  margin: 0;
  padding: 24px var(--pad-side) 56px;
  display: flex;
  gap: 32px;
  overflow-x: auto;
  overflow-y: hidden;
  scroll-snap-type: x mandatory;
  scrollbar-width: thin;
  scrollbar-color: var(--line) transparent;
}
.art-rail::-webkit-scrollbar { height: 4px; }
.art-rail::-webkit-scrollbar-thumb { background: var(--line); }
.art-rail::-webkit-scrollbar-track { background: transparent; }

.art-card {
  flex: 0 0 clamp(280px, 28vw, 380px);
  scroll-snap-align: start;
  display: grid;
  gap: 16px;
}

.art-frame {
  width: 100%;
  aspect-ratio: 4 / 5;
  background: var(--paper);
  border: 1px solid var(--line);
  position: relative;
  overflow: hidden;
  transition: transform .4s var(--ease);
}
.art-frame::before {
  content: '';
  position: absolute;
  inset: 50% auto auto 50%;
  width: 40%;
  height: 1px;
  background: var(--line);
  transform: translate(-50%, -50%);
}
.art-frame::after {
  content: attr(data-art);
  position: absolute;
  bottom: 12px;
  right: 14px;
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.22em;
  color: var(--ink-3);
  text-transform: uppercase;
}
.art-card:hover .art-frame { transform: scale(1.02); }

.art-meta {
  display: flex;
  gap: 16px;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--ink-3);
  padding-top: 4px;
}

.art-h {
  font-family: var(--serif-cn);
  font-weight: 400;
  font-size: 18px;
  line-height: 1.45;
  margin: 0;
  color: var(--ink);
}
.art-p {
  font-family: var(--sans-cn);
  font-size: 13px;
  line-height: 1.75;
  color: var(--ink-2);
  margin: 0;
}

.art-rail-hint {
  text-align: right;
  padding: 0 var(--pad-side);
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--ink-3);
}

.art-pull {
  margin: 96px 0 0;
  padding: 64px 0;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}
.art-pull blockquote {
  font-family: var(--serif-en);
  font-style: italic;
  font-weight: 300;
  font-size: clamp(24px, 3vw, 40px);
  line-height: 1.4;
  margin: 0;
  color: var(--ink);
  max-width: 30ch;
}
.art-pull figcaption {
  margin-top: 24px;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--ink-3);
}


/* ===== FOOTER ===== */

.foot {
  background: var(--paper);
  padding: 80px var(--pad-side) 32px;
  border-top: 1px solid var(--line);
}

.foot-row {
  max-width: var(--max-w);
  margin: 0 auto;
}

.foot-row-top {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  flex-wrap: wrap;
  gap: 24px;
  padding-bottom: 56px;
  border-bottom: 1px solid var(--line);
}
.foot-en {
  font-family: var(--serif-en);
  font-weight: 300;
  font-size: clamp(32px, 4vw, 56px);
  letter-spacing: 0.02em;
  color: var(--accent-ink);
  line-height: 1;
}
.foot-cn {
  font-family: var(--serif-cn);
  font-weight: 300;
  font-size: 14px;
  color: var(--ink-2);
  margin-top: 8px;
  letter-spacing: 0.1em;
}
.foot-meta {
  display: flex;
  gap: 24px;
  flex-wrap: wrap;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--ink-2);
}

.foot-row-mid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 32px;
  padding: 56px 0;
  border-bottom: 1px solid var(--line);
}
.foot-cell-h {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--ink-3);
  margin-bottom: 14px;
}
.foot-cell a {
  font-family: var(--serif-cn);
  font-size: 14px;
  color: var(--ink);
}
.foot-soft {
  font-family: var(--sans-cn);
  font-size: 13px;
  line-height: 1.75;
  color: var(--ink-2);
}
@media (max-width: 768px) {
  .foot-row-mid { grid-template-columns: 1fr 1fr; gap: 24px; }
}

.foot-row-bot {
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  padding-top: 32px;
}
.foot-tiny {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--ink-3);
}


/* ===== ANIMATIONS ===== */

[data-fade] {
  opacity: 0;
  transform: translateY(8px);
  transition: opacity .6s var(--ease), transform .6s var(--ease);
}
[data-fade].in {
  opacity: 1;
  transform: translateY(0);
}

.hero-line[data-stagger] {
  opacity: 0;
  transform: translateY(12px);
  animation: heroIn .9s var(--ease) forwards;
}
.hero-line[data-stagger]:nth-child(1) { animation-delay: 0.15s; }
.hero-line[data-stagger]:nth-child(2) { animation-delay: 0.35s; }

@keyframes heroIn {
  to { opacity: 1; transform: translateY(0); }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
  [data-fade] { opacity: 1; transform: none; }
}


/* ===== SECTION ALT BG (subtle paper differential) ===== */

.chapter-02 { background: var(--bone); }
.chapter-03 { background: var(--bone); }
.chapter-04 { background: var(--bone); }