:root {
  --ink: #0F0E0C;
  --ink-soft: #2A2825;
  --ink-mute: #6B6862;
  --paper: #F4EFE6;
  --paper-warm: #EBE4D6;
  --paper-pure: #FAF7F0;
  --cinnabar: #B83A26;
  --cinnabar-deep: #8B2A1B;
  --jade: #4A6B5C;
  --line: rgba(15, 14, 12, 0.12);
  --line-strong: rgba(15, 14, 12, 0.25);

  --font-display: 'Fraunces', Georgia, serif;
  --font-editorial: 'Instrument Serif', Georgia, serif;
  --font-body: 'Inter Tight', -apple-system, sans-serif;
  --font-mono: 'JetBrains Mono', monospace;

  --gutter: clamp(1.5rem, 4vw, 4rem);
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-font-smoothing: antialiased; }

body {
  font-family: var(--font-body);
  background: var(--paper);
  color: var(--ink);
  font-size: 16px;
  line-height: 1.55;
}
body::before {
  content: '';
  position: fixed;
  inset: 0;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='3'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='0.4'/%3E%3C/svg%3E");
  opacity: 0.05;
  pointer-events: none;
  z-index: 1;
  mix-blend-mode: multiply;
}
main, header, footer { position: relative; z-index: 2; }
a { color: inherit; text-decoration: none; }

.container {
  max-width: 1440px;
  margin: 0 auto;
  padding: 0 var(--gutter);
}

/* ============ NAV ============ */
.nav {
  border-bottom: 1px solid var(--line);
  background: rgba(244, 239, 230, 0.92);
  backdrop-filter: blur(8px);
  position: sticky;
  top: 0;
  z-index: 100;
}
.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.4rem 0;
}
.logo {
  display: flex;
  align-items: baseline;
  gap: 0.6rem;
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 1.4rem;
  letter-spacing: -0.02em;
}
.logo-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  background: var(--ink);
  color: var(--paper);
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 0.85rem;
  position: relative;
  top: 6px;
}
.logo-mark::after {
  content: '';
  position: absolute;
  inset: 3px;
  border: 1px solid var(--paper);
}
.nav-links {
  display: flex;
  gap: 2.5rem;
  list-style: none;
  font-size: 0.88rem;
  font-weight: 500;
}
.nav-links a {
  position: relative;
  padding: 0.3rem 0;
}
.nav-links a.active { color: var(--cinnabar); }
.nav-links a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 1px;
  background: var(--cinnabar);
  transition: width 0.3s;
}
.nav-links a:hover::after, .nav-links a.active::after { width: 100%; }
.btn-primary {
  background: var(--ink);
  color: var(--paper);
  padding: 0.75rem 1.4rem;
  font-size: 0.82rem;
  font-weight: 500;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  border: 1px solid var(--ink);
  transition: all 0.3s;
}
.btn-primary:hover { background: var(--cinnabar); border-color: var(--cinnabar); }

/* ============ BREADCRUMB ============ */
.breadcrumb {
  padding: 1.5rem 0 0;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--ink-mute);
}
.breadcrumb a:hover { color: var(--cinnabar); }
.breadcrumb .sep { margin: 0 0.6rem; color: var(--line-strong); }
.breadcrumb .current { color: var(--ink); }

/* ============ CATEGORY HEADER ============ */
.cat-header {
  padding: 3rem 0 4rem;
  border-bottom: 1px solid var(--line);
  display: grid;
  grid-template-columns: 1.6fr 1fr;
  gap: 4rem;
  align-items: end;
}
.cat-eyebrow {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  color: var(--cinnabar);
  margin-bottom: 1.5rem;
  display: flex;
  align-items: center;
  gap: 1rem;
}
.cat-eyebrow::before {
  content: '';
  width: 32px;
  height: 1px;
  background: var(--cinnabar);
}
.cat-title {
  font-family: var(--font-display);
  font-size: clamp(2.4rem, 6vw, 5rem);
  font-weight: 300;
  line-height: 0.95;
  letter-spacing: -0.035em;
  margin-bottom: 1.5rem;
  font-variation-settings: "opsz" 144;
}
.cat-title em {
  font-family: var(--font-editorial);
  font-style: italic;
  color: var(--cinnabar);
}
.cat-desc {
  font-size: 1.05rem;
  line-height: 1.65;
  color: var(--ink-soft);
  max-width: 36em;
}
.cat-meta {
  border-left: 1px solid var(--line-strong);
  padding-left: 2rem;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--ink-mute);
  line-height: 1.8;
}
.cat-meta strong {
  display: block;
  color: var(--ink);
  font-family: var(--font-display);
  font-size: 2.2rem;
  font-weight: 400;
  letter-spacing: -0.02em;
  text-transform: none;
  margin-bottom: 0.2rem;
  font-variation-settings: "opsz" 144;
}
.cat-meta-row { margin-bottom: 1.5rem; }
.cat-meta-row:last-child { margin-bottom: 0; }

/* ============ CATEGORY HERO 背景图（build-pages.js 注入 cardBg） ============ */
.cat-hero { position: relative; overflow: hidden; }
.cat-hero-bg {
  position: absolute; inset: 0;
  width: 100%; height: 100%;
  object-fit: cover; z-index: 0;
}
.cat-hero-overlay {
  position: absolute; inset: 0; z-index: 1;
  background: linear-gradient(100deg, rgba(15, 14, 12, 0.86) 0%, rgba(15, 14, 12, 0.70) 100%);
}
.cat-hero > .container { position: relative; z-index: 2; }
.cat-hero .cat-header { border-bottom-color: rgba(244, 239, 230, 0.18); }
.cat-hero .cat-title { color: var(--paper); }
.cat-hero .cat-desc { color: rgba(244, 239, 230, 0.82); }
.cat-hero .cat-meta {
  color: rgba(244, 239, 230, 0.72);
  border-left-color: rgba(244, 239, 230, 0.28);
}
.cat-hero .cat-meta strong { color: var(--paper); }

/* ============ FILTER BAR ============ */
.filter-bar {
  position: sticky;
  top: 73px;
  z-index: 50;
  background: rgba(244, 239, 230, 0.96);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line);
  padding: 1.2rem 0;
}
.filter-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
  flex-wrap: wrap;
}
.filter-group {
  display: flex;
  align-items: center;
  gap: 0.8rem;
  flex-wrap: wrap;
}
.filter-label {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--ink-mute);
}
.chip {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  padding: 0.45rem 0.85rem;
  border: 1px solid var(--line-strong);
  background: transparent;
  color: var(--ink-soft);
  cursor: pointer;
  transition: all 0.25s;
}
.chip:hover { border-color: var(--ink); }
.chip.active {
  background: var(--ink);
  color: var(--paper);
  border-color: var(--ink);
}
.filter-sort {
  display: flex;
  align-items: center;
  gap: 0.7rem;
}
.filter-sort select {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  padding: 0.45rem 1.5rem 0.45rem 0.85rem;
  border: 1px solid var(--line-strong);
  background-color: transparent;
  background-image: url("data:image/svg+xml,%3Csvg width='8' height='5' viewBox='0 0 8 5' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M1 1l3 3 3-3' stroke='%230F0E0C' stroke-width='1.2' fill='none' stroke-linecap='square'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 0.7rem center;
  appearance: none;
  cursor: pointer;
  color: var(--ink);
  border-radius: 0;
}

/* ============ FACTORY GRID ============ */
.factories-section {
  padding: 4rem 0 6rem;
}
.results-meta {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--ink-mute);
  margin-bottom: 2.5rem;
}
.results-meta strong { color: var(--cinnabar); }

.factory-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0;
  border-top: 1px solid var(--line-strong);
  border-left: 1px solid var(--line-strong);
}
.fcard {
  border-right: 1px solid var(--line-strong);
  border-bottom: 1px solid var(--line-strong);
  background: var(--paper);
  cursor: pointer;
  transition: background 0.4s;
  display: flex;
  flex-direction: column;
}
.fcard:hover { background: var(--paper-warm); }
.fcard-image {
  aspect-ratio: 4/3;
  background: var(--paper-warm);
  position: relative;
  overflow: hidden;
  border-bottom: 1px solid var(--line-strong);
}
.fcard-image svg { width: 100%; height: 100%; display: block; }
.fcard-image img { width: 100%; height: 100%; object-fit: cover; display: block; transition: transform 0.7s cubic-bezier(0.2, 0.6, 0.2, 1); }
.fcard:hover .fcard-image img { transform: scale(1.04); }
.fcard-badge {
  position: absolute;
  top: 1rem;
  left: 1rem;
  background: var(--ink);
  color: var(--paper);
  font-family: var(--font-mono);
  font-size: 0.62rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  padding: 0.35rem 0.6rem;
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
}
.fcard-id {
  position: absolute;
  top: 1rem;
  right: 1rem;
  font-family: var(--font-mono);
  font-size: 0.65rem;
  letter-spacing: 0.1em;
  color: var(--ink-mute);
  background: var(--paper);
  padding: 0.3rem 0.55rem;
  border: 1px solid var(--line);
}
.fcard-body {
  padding: 1.6rem 1.6rem 1.8rem;
  flex: 1;
  display: flex;
  flex-direction: column;
}
.fcard-loc {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--cinnabar);
  margin-bottom: 0.6rem;
}
.fcard-audit {
  color: var(--ink);
  background: rgba(184, 58, 38, 0.08);
  padding: 0.05em 0.4em;
  margin-left: 0.3em;
  border-radius: 2px;
  font-weight: 500;
}
.fcard-name {
  font-family: var(--font-display);
  font-size: 1.45rem;
  font-weight: 500;
  letter-spacing: -0.015em;
  line-height: 1.15;
  margin-bottom: 0.8rem;
  font-variation-settings: "opsz" 72;
  transition: color 0.3s;
}
.fcard:hover .fcard-name { color: var(--cinnabar); }
.fcard-desc {
  font-size: 0.88rem;
  color: var(--ink-soft);
  line-height: 1.55;
  margin-bottom: 1.2rem;
  flex: 1;
}
.fcard-specs {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.8rem 1rem;
  padding-top: 1.2rem;
  border-top: 1px solid var(--line);
  margin-bottom: 1.2rem;
}
.fcard-spec {
  font-family: var(--font-mono);
  font-size: 0.62rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--ink-mute);
  line-height: 1.5;
}
.fcard-spec strong {
  display: block;
  color: var(--ink);
  font-size: 0.78rem;
  font-weight: 500;
  text-transform: none;
  letter-spacing: 0;
  margin-bottom: 0.1rem;
}
.fcard-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.3rem;
}
.tag {
  font-family: var(--font-mono);
  font-size: 0.58rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  padding: 0.25rem 0.5rem;
  border: 1px solid var(--line-strong);
  color: var(--ink-soft);
}

/* ============ EMPTY STATE ============ */
.empty {
  display: none;
  padding: 5rem 0;
  text-align: center;
  border-top: 1px solid var(--line);
}
.empty.visible { display: block; }
.empty h3 {
  font-family: var(--font-display);
  font-size: 1.8rem;
  font-weight: 400;
  margin-bottom: 1rem;
  font-variation-settings: "opsz" 144;
}
.empty p { color: var(--ink-mute); margin-bottom: 2rem; }

/* ============ CTA STRIP ============ */
.cta-strip {
  background: var(--ink);
  color: var(--paper);
  padding: 4rem 0;
  border-top: 1px solid var(--ink);
  border-bottom: 1px solid var(--ink);
}
.cta-strip-inner {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 3rem;
  align-items: center;
}
.cta-strip h3 {
  font-family: var(--font-display);
  font-size: clamp(1.6rem, 3vw, 2.4rem);
  font-weight: 400;
  letter-spacing: -0.02em;
  line-height: 1.1;
  font-variation-settings: "opsz" 144;
}
.cta-strip h3 em {
  font-family: var(--font-editorial);
  font-style: italic;
  color: var(--cinnabar);
}
.cta-strip-cta {
  text-align: right;
}
.btn-light {
  background: var(--paper);
  color: var(--ink);
  padding: 1rem 1.6rem;
  font-size: 0.85rem;
  font-weight: 500;
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  border: 1px solid var(--paper);
  transition: all 0.3s;
}
.btn-light:hover { background: var(--cinnabar); color: var(--paper); border-color: var(--cinnabar); }

/* ============ FOOTER ============ */
footer {
  background: var(--ink);
  color: var(--paper);
  padding: 4rem 0 2rem;
}
.footer-bottom {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.05em;
  color: rgba(244, 239, 230, 0.5);
  line-height: 1.7;
}
.footer-bottom strong {
  display: block;
  color: var(--paper);
  margin-bottom: 0.5rem;
  text-transform: uppercase;
}
.footer-bank { text-align: right; }

/* ============ RESPONSIVE ============ */
@media (max-width: 1024px) {
  .nav-links { display: none; }
  .cat-header { grid-template-columns: 1fr; gap: 2rem; }
  .factory-grid { grid-template-columns: repeat(2, 1fr); }
  .cta-strip-inner { grid-template-columns: 1fr; gap: 1.5rem; }
  .cta-strip-cta { text-align: left; }
}
@media (max-width: 640px) {
  .factory-grid { grid-template-columns: 1fr; }
  .filter-bar { padding: 1rem 0; }
  .filter-inner { gap: 1rem; }
  .footer-bottom { grid-template-columns: 1fr; }
  .footer-bank { text-align: left; }
}