:root {
  --bg: #080808;
  --bg-soft: #10100f;
  --panel: #151513;
  --text: #f2f0eb;
  --muted: #a09d96;
  --muted-dark: #706d67;
  --line: rgba(255,255,255,.11);
  --gold: #c9a876;
  --gold-bright: #e6c793;
  --content: 1240px;
  --header-height: 68px;
  --font-zh: "Noto Sans TC", "Microsoft JhengHei", system-ui, sans-serif;
  --font-serif: "Noto Serif TC", "PMingLiU", serif;
  --font-en: "Segoe UI", "Helvetica Neue", Arial, sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; background: var(--bg); }
body {
  margin: 0;
  overflow-x: hidden;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-zh);
  -webkit-font-smoothing: antialiased;
}
body::selection { color: #0b0b0a; background: var(--gold-bright); }
img { display: block; width: 100%; }
a { color: inherit; }
button, input { font: inherit; }

.skip-link {
  position: fixed;
  left: 1rem;
  top: -4rem;
  z-index: 1000;
  padding: .75rem 1rem;
  background: var(--gold);
  color: #090909;
  text-decoration: none;
}
.skip-link:focus { top: 1rem; }
:focus-visible { outline: 2px solid var(--gold-bright); outline-offset: 4px; }

.site-header {
  position: fixed;
  inset: 0 0 auto;
  z-index: 100;
  height: var(--header-height);
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  padding: 0 clamp(1rem, 3vw, 3rem);
  border-bottom: 1px solid rgba(255,255,255,.08);
  background: rgba(8,8,8,.72);
  backdrop-filter: blur(16px);
}
.brand {
  justify-self: start;
  display: flex;
  align-items: center;
  gap: .7rem;
  text-decoration: none;
}
.brand-light {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--gold-bright);
  box-shadow: 0 0 12px rgba(230,199,147,.72);
}
.brand strong {
  font-family: var(--font-en);
  font-size: .9rem;
  letter-spacing: .16em;
}
.brand strong span { color: var(--gold); }
.brand small {
  padding-left: .8rem;
  border-left: 1px solid var(--line);
  color: var(--muted);
  font-family: var(--font-serif);
  font-size: .72rem;
  letter-spacing: .22em;
}
.chapter-nav {
  display: flex;
  align-items: center;
  gap: clamp(1.2rem, 2.4vw, 2.6rem);
}
.chapter-nav a {
  position: relative;
  color: var(--muted);
  font-family: var(--font-en);
  font-size: .7rem;
  letter-spacing: .16em;
  text-decoration: none;
  transition: color .25s ease;
}
.chapter-nav a::after {
  content: "";
  position: absolute;
  left: 0;
  right: 100%;
  bottom: -.75rem;
  height: 1px;
  background: var(--gold);
  transition: right .3s ease;
}
.chapter-nav a:hover { color: var(--text); }
.chapter-nav a:hover::after { right: 0; }
.page-mark {
  justify-self: end;
  color: var(--muted-dark);
  font-family: var(--font-en);
  font-size: .64rem;
  letter-spacing: .18em;
}
.reading-progress {
  position: absolute;
  left: 0;
  right: 0;
  bottom: -1px;
  height: 2px;
  overflow: hidden;
}
.reading-progress span {
  display: block;
  width: 100%;
  height: 100%;
  transform: scaleX(0);
  transform-origin: left;
  background: linear-gradient(90deg, #80623c, var(--gold-bright));
  box-shadow: 0 0 10px rgba(230,199,147,.5);
}

.hero {
  position: relative;
  min-height: 100svh;
  overflow: hidden;
  display: flex;
  align-items: flex-end;
  padding: calc(var(--header-height) + 4rem) clamp(1.4rem, 7vw, 8rem) clamp(4rem, 10vh, 7.5rem);
}
.hero-media, .hero-media img, .hero-shade {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
}
.hero-media img {
  object-fit: cover;
  object-position: 60% 56%;
  transform: scale(1.025);
  animation: hero-settle 1.8s cubic-bezier(.2,.7,.2,1) both;
}
.hero-shade {
  background:
    linear-gradient(90deg, rgba(3,3,3,.93) 0%, rgba(3,3,3,.66) 40%, rgba(3,3,3,.12) 76%),
    linear-gradient(0deg, rgba(3,3,3,.72) 0%, transparent 45%);
}
.hero-copy {
  position: relative;
  z-index: 2;
  width: min(840px, 82vw);
}
.eyebrow {
  margin: 0 0 1.4rem;
  color: var(--gold);
  font-family: var(--font-en);
  font-size: .68rem;
  font-weight: 600;
  letter-spacing: .28em;
  line-height: 1.6;
}
.hero h1, .story-heading h2, .intro h2, .finale h2 {
  margin: 0;
  font-family: var(--font-serif);
  font-weight: 500;
  letter-spacing: .045em;
}
.headline-line {
  display: block;
  white-space: nowrap;
}
.hero h1 {
  max-width: 840px;
  font-size: clamp(2.5rem, 5.2vw, 4.8rem);
  line-height: 1.28;
}
.hero-lead {
  max-width: 570px;
  margin: 2rem 0 2.8rem;
  color: rgba(242,240,235,.72);
  font-size: clamp(.9rem, 1.2vw, 1.05rem);
  font-weight: 300;
  letter-spacing: .08em;
  line-height: 2;
}
.scroll-cue {
  display: inline-flex;
  align-items: center;
  gap: 1rem;
  color: var(--text);
  font-size: .75rem;
  letter-spacing: .14em;
  text-decoration: none;
}
.scroll-cue i {
  position: relative;
  width: 42px;
  height: 42px;
  border: 1px solid rgba(255,255,255,.28);
  border-radius: 50%;
}
.scroll-cue i::after {
  content: "";
  position: absolute;
  left: 50%;
  top: 44%;
  width: 6px;
  height: 6px;
  border-right: 1px solid var(--gold-bright);
  border-bottom: 1px solid var(--gold-bright);
  transform: translate(-50%,-50%) rotate(45deg);
}
.hero-index {
  position: absolute;
  z-index: 2;
  right: clamp(1.4rem, 4vw, 4rem);
  bottom: clamp(3rem, 8vh, 6rem);
  display: flex;
  align-items: flex-end;
  gap: 1rem;
  color: rgba(255,255,255,.4);
  font-family: var(--font-en);
}
.hero-index span {
  padding-bottom: .35rem;
  font-size: .58rem;
  letter-spacing: .24em;
}
.hero-index b {
  color: rgba(255,255,255,.82);
  font-size: clamp(2.5rem, 5vw, 4.5rem);
  font-weight: 200;
  line-height: .8;
}

.section-shell {
  width: min(var(--content), calc(100% - clamp(2rem, 8vw, 8rem)));
  margin-inline: auto;
}
.intro {
  position: relative;
  display: grid;
  grid-template-columns: .16fr 1fr;
  gap: clamp(2rem, 5vw, 6rem);
  align-items: start;
  padding-block: clamp(7rem, 15vw, 13rem);
}
.section-number {
  color: var(--gold);
  font-family: var(--font-en);
  font-size: .65rem;
  font-weight: 700;
  letter-spacing: .2em;
}
.intro-copy h2 {
  font-size: clamp(2rem, 4vw, 3.7rem);
  line-height: 1.45;
}
.intro-copy > p:last-child {
  margin: 2rem 0 0;
  color: var(--muted);
  line-height: 2;
  letter-spacing: .07em;
}
.overview-pair {
  grid-column: 1 / -1;
  justify-self: center;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1px;
  width: min(100%, 1170px);
  margin-top: clamp(2rem, 4vw, 3.5rem);
  background: var(--line);
}
.overview-pair figure, .detail-strip figure, .wash-gallery figure, .rear-pair figure {
  position: relative;
  margin: 0;
  overflow: hidden;
  background: var(--panel);
}
.overview-pair img {
  height: auto;
  aspect-ratio: 3 / 4;
  object-fit: contain;
}
.overview-pair figcaption, .rear-pair figcaption {
  position: absolute;
  inset: auto 0 0;
  display: flex;
  justify-content: space-between;
  padding: 1rem;
  background: linear-gradient(0deg, rgba(0,0,0,.85), transparent);
  font-size: .72rem;
  letter-spacing: .15em;
}
.overview-pair figcaption span, .rear-pair figcaption span {
  color: var(--gold-bright);
  font-family: var(--font-en);
}
.disassembly-proof {
  grid-column: 1 / -1;
  justify-self: center;
  width: min(100%, 1170px);
  margin: clamp(3rem, 6vw, 5.5rem) 0 0;
  border: 1px solid var(--line);
  background: var(--panel);
}
.disassembly-proof picture {
  display: block;
  overflow: hidden;
}
.disassembly-proof img {
  height: auto;
  aspect-ratio: 4 / 3;
  object-fit: cover;
}
.disassembly-proof figcaption {
  display: grid;
  grid-template-columns: minmax(210px, .42fr) 1fr;
  gap: clamp(2rem, 5vw, 5rem);
  align-items: start;
  padding: clamp(1.5rem, 3vw, 2.5rem);
  border-top: 1px solid var(--line);
  background: linear-gradient(135deg, rgba(201,168,118,.05), rgba(255,255,255,.015));
}
.disassembly-proof figcaption > span {
  color: var(--gold);
  font-family: var(--font-en);
  font-size: .62rem;
  font-weight: 600;
  letter-spacing: .18em;
  line-height: 1.8;
}
.disassembly-proof figcaption strong {
  display: block;
  margin-bottom: .75rem;
  font-family: var(--font-serif);
  font-size: clamp(1.5rem, 2.7vw, 2.5rem);
  font-weight: 500;
  letter-spacing: .04em;
}
.disassembly-proof figcaption p {
  max-width: 680px;
  margin: 0;
  color: var(--muted);
  font-size: .88rem;
  letter-spacing: .07em;
  line-height: 2;
}

.story-block {
  padding-block: clamp(7rem, 13vw, 12rem);
  border-top: 1px solid var(--line);
}
.story-block-alt { background: var(--bg-soft); }
.story-heading {
  display: grid;
  grid-template-columns: .12fr 1.15fr .68fr;
  gap: clamp(1.5rem, 4vw, 4rem);
  align-items: start;
  margin-bottom: clamp(4rem, 8vw, 7rem);
}
.story-heading h2 {
  font-size: clamp(2.05rem, 3.3vw, 3.3rem);
  line-height: 1.55;
  letter-spacing: .025em;
}
.story-summary {
  max-width: 430px;
  margin: 3.25rem 0 0;
  color: var(--muted);
  font-size: .94rem;
  font-weight: 300;
  letter-spacing: .07em;
  line-height: 2.1;
}
.comparison-wrap {
  width: min(1480px, calc(100% - clamp(2rem, 6vw, 6rem)));
  margin: 0 auto clamp(6rem, 12vw, 11rem);
  display: grid;
  grid-template-columns: .32fr 1fr;
  gap: clamp(2rem, 5vw, 5rem);
  align-items: end;
}
.comparison-wrap-reverse { grid-template-columns: 1fr .32fr; }
.comparison-wrap-reverse .comparison-copy { order: 2; }
.comparison-wrap-reverse .comparison { order: 1; }
.comparison-copy { padding-bottom: 1rem; }
.comparison-kicker {
  color: var(--gold);
  font-family: var(--font-en);
  font-size: .62rem;
  font-weight: 600;
  letter-spacing: .2em;
}
.comparison-copy h3 {
  margin: 1rem 0;
  font-family: var(--font-serif);
  font-size: clamp(1.4rem, 2.2vw, 2.2rem);
  font-weight: 500;
  line-height: 1.5;
}
.comparison-copy p {
  margin: 0;
  color: var(--muted);
  font-size: .88rem;
  line-height: 2;
}
.comparison {
  --position: 50%;
  position: relative;
  aspect-ratio: 4 / 3;
  margin: 0;
  overflow: hidden;
  background: #171717;
  cursor: ew-resize;
  isolation: isolate;
}
.comparison img {
  position: absolute;
  inset: 0;
  height: 100%;
  object-fit: cover;
  user-select: none;
  pointer-events: none;
}
.comparison-before {
  position: absolute;
  z-index: 2;
  inset: 0;
  overflow: hidden;
  clip-path: inset(0 calc(100% - var(--position)) 0 0);
}
.comparison-before img { width: 100%; max-width: none; }
.comparison input {
  position: absolute;
  z-index: 5;
  inset: 0;
  width: 100%;
  height: 100%;
  margin: 0;
  opacity: 0;
  cursor: ew-resize;
}
.comparison-handle {
  position: absolute;
  z-index: 4;
  left: var(--position);
  top: 0;
  bottom: 0;
  width: 1px;
  background: rgba(255,255,255,.9);
  pointer-events: none;
}
.comparison-handle i {
  position: absolute;
  left: 50%;
  top: 50%;
  width: 48px;
  height: 48px;
  border: 1px solid rgba(255,255,255,.72);
  border-radius: 50%;
  background: rgba(8,8,8,.72);
  box-shadow: 0 4px 24px rgba(0,0,0,.28);
  transform: translate(-50%,-50%);
  backdrop-filter: blur(8px);
}
.comparison-handle i::before, .comparison-handle i::after {
  content: "";
  position: absolute;
  top: 50%;
  width: 7px;
  height: 7px;
  border-top: 1px solid var(--gold-bright);
  border-right: 1px solid var(--gold-bright);
}
.comparison-handle i::before { left: 12px; transform: translateY(-50%) rotate(-135deg); }
.comparison-handle i::after { right: 12px; transform: translateY(-50%) rotate(45deg); }
.compare-label {
  position: absolute;
  z-index: 3;
  top: 1rem;
  padding: .45rem .65rem;
  color: #fff;
  background: rgba(5,5,5,.68);
  font-family: var(--font-en);
  font-size: .58rem;
  letter-spacing: .18em;
  pointer-events: none;
}
.compare-label-before { left: 1rem; }
.compare-label-after { right: 1rem; }
.detail-strip {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(1rem, 3vw, 2.5rem);
  width: min(1180px, calc(100% - clamp(2rem, 8vw, 8rem)));
}
.detail-strip figure {
  border: 1px solid var(--line);
}
.detail-strip img {
  height: auto;
  aspect-ratio: 3 / 4;
  object-fit: contain;
}
.detail-strip figcaption {
  display: flex;
  align-items: center;
  min-height: 4.75rem;
  padding: 1.15rem 1.35rem 1.25rem;
  border-top: 1px solid var(--line);
  background: linear-gradient(135deg, rgba(201,168,118,.045), rgba(255,255,255,.015));
  color: var(--muted);
  font-size: .78rem;
  letter-spacing: .08em;
  line-height: 1.8;
}

.wash-section {
  padding-block: clamp(7rem, 13vw, 12rem);
  background:
    radial-gradient(circle at 50% 30%, rgba(201,168,118,.06), transparent 36%),
    var(--bg);
}
.wash-gallery {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(1rem, 3vw, 2rem);
  width: min(1180px, calc(100% - clamp(2rem, 8vw, 8rem)));
}
.wash-gallery img {
  height: auto;
  aspect-ratio: 3 / 4;
  object-fit: contain;
}
.wash-gallery figcaption {
  position: absolute;
  inset: auto 0 0;
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  padding: 3rem 1.5rem 1.4rem;
  background: linear-gradient(0deg, rgba(0,0,0,.86), transparent);
}
.wash-gallery figcaption b {
  font-family: var(--font-serif);
  font-size: 1.1rem;
  font-weight: 500;
}
.wash-gallery figcaption span {
  color: var(--gold);
  font-family: var(--font-en);
  font-size: .58rem;
  letter-spacing: .15em;
}
.wash-note {
  margin-top: 1.5rem;
  color: var(--muted);
  font-size: .78rem;
  letter-spacing: .08em;
}
.wash-note span { color: var(--gold); }

.gpu-section {
  padding-block: clamp(7rem, 13vw, 12rem);
  border-top: 1px solid var(--line);
  background: #0d0d0c;
}
.gpu-sequence {
  width: min(1240px, calc(100% - clamp(2rem, 8vw, 8rem)));
  margin-top: 0;
  padding: 0;
  list-style: none;
}
.gpu-sequence li {
  display: grid;
  grid-template-columns: minmax(0, 860px) minmax(260px, .42fr);
  gap: clamp(2rem, 5vw, 5rem);
  align-items: center;
  padding-block: clamp(4rem, 7vw, 6.5rem);
  border-top: 1px solid var(--line);
}
.gpu-sequence figure {
  display: grid;
  place-items: center;
  margin: 0;
  overflow: hidden;
  background: #090909;
}
.gpu-sequence img {
  width: auto;
  max-width: 100%;
  height: auto;
  max-height: min(72vh, 760px);
  aspect-ratio: 4 / 3;
  object-fit: contain;
  transition: transform 1.2s cubic-bezier(.2,.7,.2,1);
}
.gpu-sequence li.is-visible img { transform: scale(1.008); }
.gpu-sequence li > div > span {
  color: var(--gold);
  font-family: var(--font-en);
  font-size: .6rem;
  letter-spacing: .18em;
}
.gpu-sequence h3 {
  margin: 1rem 0 1.25rem;
  font-family: var(--font-serif);
  font-size: clamp(1.7rem, 3vw, 3rem);
  font-weight: 500;
}
.gpu-sequence p {
  margin: 0;
  color: var(--muted);
  font-size: .9rem;
  letter-spacing: .07em;
  line-height: 2;
}
.material-note {
  margin-top: 1.5rem;
  padding: 1rem 1.1rem;
  border-left: 2px solid var(--gold);
  background: rgba(201,168,118,.07);
}
.material-note span,
.material-note strong,
.material-note small {
  display: block;
}
.material-note span {
  color: var(--gold);
  font-family: var(--font-en);
  font-size: .55rem;
  letter-spacing: .18em;
}
.material-note strong {
  margin: .4rem 0 .25rem;
  color: var(--text);
  font-family: var(--font-en);
  font-size: 1rem;
  font-weight: 500;
  letter-spacing: .04em;
}
.material-note small {
  color: var(--muted);
  font-size: .72rem;
  line-height: 1.7;
}

.rebuild-section {
  padding-block: clamp(7rem, 13vw, 12rem);
  background: var(--bg-soft);
}
.rear-pair {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1px;
  width: min(1120px, calc(100% - clamp(2rem, 8vw, 8rem)));
  background: var(--line);
}
.rear-pair img {
  height: auto;
  aspect-ratio: 3 / 4;
  object-fit: contain;
}
.complete-build {
  display: grid;
  grid-template-columns: minmax(0, 760px) minmax(240px, 1fr);
  gap: clamp(2rem, 5vw, 5rem);
  align-items: center;
  width: min(1120px, calc(100% - clamp(2rem, 8vw, 8rem)));
  margin-top: clamp(5rem, 10vw, 9rem);
}
.complete-build picture {
  display: grid;
  place-items: center;
  overflow: hidden;
  background: #090909;
}
.complete-build img {
  width: auto;
  max-width: 100%;
  height: auto;
  max-height: min(82vh, 920px);
  aspect-ratio: 3 / 4;
  object-fit: contain;
}
.complete-build figcaption {
  margin: 0;
}
.complete-build figcaption > span {
  color: var(--gold);
  font-family: var(--font-en);
  font-size: .58rem;
  letter-spacing: .18em;
}
.complete-build figcaption strong {
  display: block;
  margin: 1rem 0 1.25rem;
  color: var(--text);
  font-family: var(--font-serif);
  font-size: clamp(1.9rem, 3vw, 3.25rem);
  font-weight: 500;
}
.complete-build figcaption p {
  max-width: 360px;
  margin: 0;
  color: var(--muted);
  font-size: .9rem;
  letter-spacing: .07em;
  line-height: 2;
}

.validation-section {
  padding-block: clamp(7rem, 13vw, 12rem);
  border-top: 1px solid var(--line);
}
.metric-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  width: min(1060px, calc(100% - clamp(2rem, 8vw, 8rem)));
  margin-bottom: clamp(4rem, 7vw, 6rem);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}
.metric-grid article {
  min-width: 0;
  padding: clamp(1.25rem, 2.3vw, 2rem);
  border-right: 1px solid var(--line);
}
.metric-grid article:last-child { border-right: 0; }
.metric-grid article > p {
  margin: 0 0 1.6rem;
  color: var(--muted);
  font-family: var(--font-en);
  font-size: .6rem;
  letter-spacing: .16em;
}
.metric-values {
  display: flex;
  align-items: baseline;
  gap: .65rem;
  font-family: var(--font-en);
  font-variant-numeric: tabular-nums;
}
.metric-values span {
  color: var(--muted-dark);
  font-size: clamp(1.35rem, 2.4vw, 2.4rem);
  text-decoration: line-through;
  text-decoration-thickness: 1px;
}
.metric-values i { color: var(--muted-dark); font-style: normal; }
.metric-values strong {
  color: var(--text);
  font-size: clamp(2rem, 3vw, 3.15rem);
  font-weight: 300;
}
.metric-values small { font-size: .42em; }
.metric-grid article > b {
  display: block;
  margin: 1.2rem 0 .4rem;
  color: var(--gold-bright);
  font-family: var(--font-en);
  font-size: .9rem;
  font-weight: 600;
  letter-spacing: .08em;
}
.metric-grid article > small {
  color: var(--muted-dark);
  font-size: .7rem;
  line-height: 1.6;
}
.test-evidence {
  display: grid;
  gap: clamp(3rem, 6vw, 5rem);
  width: min(980px, calc(100% - clamp(2rem, 8vw, 8rem)));
}
.test-evidence article > header {
  display: flex;
  justify-content: space-between;
  align-items: end;
  margin-bottom: 1rem;
}
.test-evidence header span {
  color: var(--gold);
  font-family: var(--font-en);
  font-size: .62rem;
  letter-spacing: .18em;
}
.test-evidence header b {
  font-family: var(--font-serif);
  font-size: .9rem;
  font-weight: 400;
  letter-spacing: .1em;
}
.test-evidence article > div {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}
.test-evidence figure {
  position: relative;
  margin: 0;
  overflow: hidden;
  border: 1px solid var(--line);
  background: #0d0d0d;
}
.test-evidence a {
  display: block;
  color: inherit;
  text-decoration: none;
  cursor: zoom-in;
}
.test-evidence img {
  height: auto;
  aspect-ratio: 4 / 3;
  object-fit: contain;
}
.test-evidence figcaption {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  padding: .8rem 1rem;
  color: var(--muted);
  border-top: 1px solid var(--line);
  background: #11110f;
  font-family: var(--font-en);
  font-size: .58rem;
  letter-spacing: .12em;
  line-height: 1.6;
}
.test-evidence figcaption strong {
  color: var(--gold-bright);
  font-weight: 600;
}
.test-evidence figcaption span {
  color: var(--muted-dark);
  text-align: right;
}
.case-disclaimer {
  margin-top: 2rem;
  color: var(--muted-dark);
  font-size: .72rem;
  letter-spacing: .06em;
  line-height: 1.8;
}

.finale {
  position: relative;
  min-height: 92svh;
  overflow: hidden;
  display: flex;
  align-items: center;
  padding: 8rem clamp(1.4rem, 8vw, 9rem);
}
.finale > picture, .finale > picture img, .finale-shade {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
}
.finale > picture img { object-fit: cover; object-position: 68% 55%; }
.finale-shade {
  background:
    linear-gradient(90deg, rgba(4,4,4,.94), rgba(4,4,4,.65) 45%, rgba(4,4,4,.1)),
    linear-gradient(0deg, rgba(4,4,4,.55), transparent);
}
.finale-copy {
  position: relative;
  z-index: 2;
  max-width: 920px;
}
.finale h2 {
  font-size: clamp(2.2rem, 4.2vw, 4.2rem);
  line-height: 1.42;
}
.finale-copy > p:not(.eyebrow) {
  margin: 2rem 0 0;
  color: rgba(255,255,255,.67);
  letter-spacing: .09em;
  line-height: 2;
}
.finale-actions {
  display: flex;
  align-items: center;
  gap: 2rem;
  margin-top: 3rem;
}
.primary-button {
  display: inline-flex;
  align-items: center;
  min-height: 50px;
  padding: .85rem 1.6rem;
  color: #0b0b0a;
  background: var(--gold-bright);
  font-size: .78rem;
  font-weight: 600;
  letter-spacing: .14em;
  text-decoration: none;
  transition: background .25s ease, transform .25s ease;
}
.primary-button:hover { background: #f0d5a5; transform: translateY(-2px); }
.text-link {
  color: rgba(255,255,255,.74);
  font-size: .76rem;
  letter-spacing: .1em;
  text-decoration: none;
}
.text-link span { color: var(--gold); }

footer {
  min-height: 130px;
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 2rem;
  padding: 2rem clamp(1.4rem, 4vw, 4rem);
  border-top: 1px solid var(--line);
  background: #080808;
}
.footer-brand strong { font-size: .78rem; }
footer p {
  margin: 0;
  color: var(--muted-dark);
  font-size: .65rem;
  letter-spacing: .1em;
  text-align: center;
}
footer > a:last-child {
  justify-self: end;
  color: var(--muted);
  font-size: .68rem;
  letter-spacing: .1em;
  text-decoration: none;
}

.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity .8s ease, transform .9s cubic-bezier(.2,.7,.2,1);
}
.reveal.is-visible { opacity: 1; transform: none; }

@keyframes hero-settle {
  from { opacity: .55; transform: scale(1.075); }
  to { opacity: 1; transform: scale(1.025); }
}

@media (max-width: 980px) {
  .site-header { grid-template-columns: 1fr auto; }
  .chapter-nav { display: none; }
  .intro { grid-template-columns: .14fr 1fr; }
  .overview-pair { grid-column: 1 / -1; }
  .story-heading { grid-template-columns: .14fr 1fr; }
  .story-summary { grid-column: 2; margin-top: 0; }
  .comparison-wrap, .comparison-wrap-reverse {
    grid-template-columns: 1fr;
    align-items: start;
  }
  .comparison-wrap-reverse .comparison-copy, .comparison-wrap-reverse .comparison { order: initial; }
  .comparison-copy { max-width: 600px; padding-bottom: 0; }
  .metric-grid { grid-template-columns: 1fr; }
  .metric-grid article {
    display: grid;
    grid-template-columns: 1fr 1.4fr auto;
    gap: 1rem;
    align-items: center;
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }
  .metric-grid article:last-child { border-bottom: 0; }
  .metric-grid article > p { margin: 0; }
  .metric-grid article > b { margin: 0; }
  .metric-grid article > small { grid-column: 2 / -1; }
}

@media (max-width: 720px) {
  :root { --header-height: 60px; }
  .site-header { padding-inline: 1rem; }
  .brand { gap: .55rem; }
  .brand small, .page-mark { display: none; }
  .hero {
    align-items: flex-end;
    padding: calc(var(--header-height) + 4rem) 1.25rem 4rem;
  }
  .hero-media img { object-position: 65% center; }
  .hero-shade {
    background:
      linear-gradient(0deg, rgba(3,3,3,.94) 0%, rgba(3,3,3,.57) 55%, rgba(3,3,3,.12) 100%),
      linear-gradient(90deg, rgba(3,3,3,.35), transparent);
  }
  .hero-copy { width: 100%; }
  .headline-line {
    white-space: normal;
    text-wrap: wrap;
  }
  .hero h1 { font-size: clamp(2rem, 8.5vw, 2.8rem); }
  .hero-lead { max-width: 92%; margin-block: 1.5rem 2rem; line-height: 1.8; }
  .hero-index { display: none; }
  .section-shell { width: min(100% - 2.25rem, var(--content)); }
  .intro { grid-template-columns: 1fr; gap: 1.2rem; padding-block: 6rem; }
  .overview-pair { grid-column: auto; margin-top: 2rem; }
  .overview-pair figcaption, .rear-pair figcaption { font-size: .58rem; }
  .story-block, .wash-section, .gpu-section, .rebuild-section, .validation-section { padding-block: 6rem; }
  .story-heading { grid-template-columns: 1fr; gap: 1rem; margin-bottom: 3.5rem; }
  .story-summary { grid-column: auto; margin-top: .5rem; }
  .story-heading h2 {
    font-size: clamp(2rem, 8.3vw, 2.4rem);
    line-height: 1.5;
  }
  .story-heading h2#rebuild-title {
    font-size: clamp(1.8rem, 7.5vw, 2.2rem);
  }
  .finale h2 {
    font-size: clamp(1.8rem, 7.35vw, 2.25rem);
  }
  .comparison-wrap { width: 100%; gap: 1.5rem; margin-bottom: 6rem; }
  .comparison-copy { padding-inline: 1.15rem; }
  .comparison { aspect-ratio: 4 / 3; }
  .comparison-handle i { width: 42px; height: 42px; }
  .detail-strip, .wash-gallery, .rear-pair { grid-template-columns: 1fr; }
  .overview-pair, .detail-strip, .wash-gallery, .rear-pair, .complete-build,
  .gpu-sequence, .metric-grid, .test-evidence {
    width: min(100% - 2.25rem, var(--content));
  }
  .overview-pair { grid-template-columns: 1fr; }
  .disassembly-proof { width: min(100% - 2.25rem, var(--content)); }
  .disassembly-proof figcaption {
    grid-template-columns: 1fr;
    gap: 1.1rem;
    padding: 1.35rem 1.25rem 1.5rem;
  }
  .detail-strip { gap: 2.5rem; }
  .detail-strip img { aspect-ratio: 3 / 4; }
  .wash-gallery figure:nth-child(2) { margin-top: 1rem; }
  .wash-note { line-height: 1.8; }
  .gpu-sequence li {
    min-height: auto;
    grid-template-columns: 1fr;
    gap: 1.5rem;
    padding-block: 4rem;
  }
  .gpu-sequence img {
    width: 100%;
    max-height: none;
  }
  .gpu-sequence li > div { order: -1; }
  .gpu-sequence h3 { margin-bottom: .75rem; }
  .complete-build {
    grid-template-columns: 1fr;
    gap: 1.5rem;
    margin-top: 5rem;
  }
  .complete-build img {
    width: 100%;
    max-height: none;
  }
  .metric-grid article {
    grid-template-columns: 1fr;
    gap: .55rem;
  }
  .metric-grid article > small { grid-column: auto; }
  .metric-values strong { font-size: 2.8rem; }
  .test-evidence article > header { align-items: start; flex-direction: column; gap: .5rem; }
  .test-evidence article > div { grid-template-columns: 1fr; }
  .test-evidence figcaption { align-items: flex-start; flex-direction: column; gap: .25rem; }
  .test-evidence figcaption span { text-align: left; }
  .finale {
    min-height: 86svh;
    align-items: flex-end;
    padding: 6rem 1.25rem 4.5rem;
  }
  .finale > picture img { object-position: 66% center; }
  .finale-shade {
    background: linear-gradient(0deg, rgba(4,4,4,.96), rgba(4,4,4,.48) 72%, rgba(4,4,4,.12));
  }
  .finale-actions { align-items: flex-start; flex-direction: column; gap: 1.4rem; }
  footer { grid-template-columns: 1fr auto; }
  footer p { display: none; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: .01ms !important;
    animation-iteration-count: 1 !important;
    scroll-behavior: auto !important;
    transition-duration: .01ms !important;
  }
  .reveal { opacity: 1; transform: none; }
}