/* ==========================================================================
   GOLDTOWN ELECTRONIC TECHNOLOGY — AI Accelerator Card
   Single-page corporate site · design system
   ========================================================================== */

/* ── 1. Tokens ─────────────────────────────────────────────────────────── */
:root {
  --paper: #f7f6f1;
  --paper-2: #f2f1ea;
  --mist: #f1f3ee;
  --white: #ffffff;
  --forest: #113d34;
  --forest-deep: #0b2a24;
  --forest-soft: #174a3e;
  --ink: #15241f;
  --body: #41524a;
  --muted: #5f7267;
  --brass: #bb9861;
  --brass-light: #d6be94;
  --brass-ink: #846230;
  --bone: #f3f1e9;
  --line: rgba(17, 61, 52, 0.14);
  --line-soft: rgba(17, 61, 52, 0.08);
  --line-inv: rgba(243, 241, 233, 0.16);
  --line-inv-soft: rgba(243, 241, 233, 0.08);
  --maxw: 1240px;
  --gutter: clamp(20px, 4.4vw, 56px);
  --nav-h: 76px;
  --sans: "Archivo", "Noto Sans TC", "PingFang TC", "Heiti TC", "Microsoft JhengHei", system-ui, sans-serif;
  --mono: "IBM Plex Mono", ui-monospace, SFMono-Regular, "SF Mono", Menlo, monospace;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
}

/* ── 2. Reset & base ───────────────────────────────────────────────────── */
*,
*::before,
*::after { box-sizing: border-box; }

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--body);
  font-family: var(--sans);
  font-size: 16px;
  font-weight: 400;
  line-height: 1.95;
  letter-spacing: 0.01em;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

html[lang="en"] body { line-height: 1.72; letter-spacing: 0; }

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

img { height: auto; }

h1, h2, h3, h4,
p, ul, ol, dl, dd, figure, figcaption { margin: 0; }

ul, ol { padding: 0; list-style: none; }

a { color: inherit; text-decoration: none; }

button {
  font: inherit;
  color: inherit;
  background: none;
  border: 0;
  padding: 0;
  cursor: pointer;
}

::selection { background: var(--brass); color: var(--forest-deep); }

:where(a, button, [tabindex]):focus-visible {
  outline: 2px solid var(--brass);
  outline-offset: 4px;
  border-radius: 1px;
}

section[id] { scroll-margin-top: calc(var(--nav-h) + 8px); }

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}

.skip-link {
  position: fixed;
  top: 12px;
  left: 12px;
  z-index: 300;
  padding: 10px 18px;
  background: var(--forest);
  color: var(--bone);
  font-size: 13px;
  transform: translateY(-180%);
  transition: transform 0.25s var(--ease);
}

.skip-link:focus { transform: none; }

.icon-sprite {
  position: absolute;
  width: 0;
  height: 0;
  overflow: hidden;
}

.ico {
  width: 24px;
  height: 24px;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.5;
  stroke-linecap: round;
  stroke-linejoin: round;
  flex: none;
}

/* ── 3. Layout primitives ──────────────────────────────────────────────── */
.wrap {
  width: 100%;
  max-width: calc(var(--maxw) + var(--gutter) * 2);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.section {
  position: relative;
  padding-block: clamp(88px, 9.5vw, 148px);
}

.section--mist { background: var(--mist); }

.section--dark {
  background: var(--forest);
  color: var(--bone);
}

.section--dark h2,
.section--dark h3,
.section--dark h4 { color: var(--bone); }

.section-grid-bg {
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(to right, rgba(243, 241, 233, 0.05) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(243, 241, 233, 0.05) 1px, transparent 1px);
  background-size: 96px 96px;
  -webkit-mask-image: radial-gradient(130% 90% at 50% 0%, #000 0%, transparent 72%);
  mask-image: radial-gradient(130% 90% at 50% 0%, #000 0%, transparent 72%);
}

/* ── 4. Shared type components ─────────────────────────────────────────── */
.eyebrow {
  display: flex;
  align-items: center;
  gap: 14px;
  font-family: var(--mono);
  font-size: 10.5px;
  font-weight: 500;
  line-height: 1.5;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--muted);
}

.eyebrow::before {
  content: "";
  width: 34px;
  height: 1px;
  flex: none;
  background: var(--brass);
}

.eyebrow__num { color: var(--brass-ink); }

.eyebrow__text { display: inline-block; }
.eyebrow__desc { display: inline-block; }

.section--dark .eyebrow { color: rgba(243, 241, 233, 0.6); }
.section--dark .eyebrow__num { color: var(--brass-light); }

.label-mono {
  font-family: var(--mono);
  font-size: 10px;
  font-weight: 500;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--muted);
}

.section--dark .label-mono { color: rgba(243, 241, 233, 0.68); }

h2 {
  color: var(--ink);
  font-weight: 900;
  font-size: clamp(1.9rem, 3vw, 3.1rem);
  line-height: 1.2;
  letter-spacing: -0.015em;
  font-feature-settings: "palt" 1;
}

html[lang="en"] h2 {
  font-weight: 800;
  letter-spacing: -0.03em;
  font-size: clamp(1.8rem, 2.7vw, 2.85rem);
  line-height: 1.14;
}

.section--dark h2 { color: var(--bone); }

/* Buttons & links */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 17px 26px;
  border: 1px solid transparent;
  border-radius: 2px;
  font-size: 14px;
  font-weight: 600;
  line-height: 1;
  letter-spacing: 0.02em;
  white-space: nowrap;
  transition:
    background-color 0.35s var(--ease),
    color 0.35s var(--ease),
    border-color 0.35s var(--ease),
    transform 0.35s var(--ease);
}

.btn .ico {
  width: 16px;
  height: 16px;
  transition: transform 0.35s var(--ease);
}

.btn--primary { background: var(--forest); color: var(--bone); }
.btn--primary:hover { background: var(--forest-deep); transform: translateY(-2px); }
.btn--primary:hover .ico { transform: translate(2px, -2px); }

.btn--sm { padding: 12px 18px; font-size: 13px; }
.btn--sm .ico { width: 14px; height: 14px; }

.btn--brass { background: var(--brass); color: var(--forest-deep); }
.btn--brass:hover { background: var(--brass-light); transform: translateY(-2px); }
.btn--brass .ico { width: 17px; height: 17px; }

.btn--ghost-dark {
  border-color: rgba(243, 241, 233, 0.3);
  color: var(--bone);
}
.btn--ghost-dark:hover {
  border-color: var(--brass);
  color: var(--brass-light);
  transform: translateY(-2px);
}

.link-arrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding-bottom: 6px;
  border-bottom: 1px solid var(--line);
  font-size: 14px;
  font-weight: 600;
  color: var(--ink);
  transition: color 0.3s var(--ease), border-color 0.3s var(--ease);
}

.link-arrow .ico {
  width: 16px;
  height: 16px;
  transition: transform 0.3s var(--ease);
}

.link-arrow:hover { color: var(--brass-ink); border-color: var(--brass); }
.link-arrow:hover .ico { transform: translateY(3px); }

/* ── 5. Header / navigation ────────────────────────────────────────────── */
.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  z-index: 200;
  width: 0;
  height: 2px;
  background: var(--brass);
  pointer-events: none;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 80;
  background: rgba(247, 246, 241, 0.82);
  -webkit-backdrop-filter: blur(14px);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid transparent;
  transition: background-color 0.35s var(--ease), border-color 0.35s var(--ease);
}

.site-header.is-scrolled {
  background: rgba(247, 246, 241, 0.94);
  border-bottom-color: var(--line);
}

.header-inner {
  display: flex;
  align-items: center;
  gap: clamp(18px, 2.6vw, 44px);
  height: var(--nav-h);
}

.brand {
  display: inline-flex;
  flex-direction: column;
  gap: 4px;
  line-height: 1;
  flex: none;
}

.brand__mark {
  font-family: "Archivo", var(--sans);
  font-weight: 800;
  font-size: 17px;
  letter-spacing: 0.18em;
  color: var(--ink);
}

.brand__meta {
  display: flex;
  align-items: center;
  gap: 7px;
  font-family: var(--mono);
  font-size: 9px;
  font-weight: 400;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--muted);
}

.brand__cn { letter-spacing: 0.08em; }
.brand__sep { color: var(--brass); }

.main-nav {
  display: flex;
  align-items: center;
  gap: clamp(18px, 2.2vw, 32px);
  margin-inline: auto;
  font-size: 13.5px;
  font-weight: 500;
  color: var(--body);
}

.main-nav a {
  position: relative;
  padding: 6px 0;
  transition: color 0.25s var(--ease);
}

.main-nav a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 0;
  height: 1px;
  background: var(--brass);
  transition: width 0.35s var(--ease);
}

.main-nav a:hover,
.main-nav a.is-active { color: var(--ink); }

.main-nav a:hover::after,
.main-nav a.is-active::after { width: 100%; }

.header-actions {
  display: flex;
  align-items: center;
  gap: clamp(12px, 1.6vw, 22px);
  flex: none;
}

.lang-switch {
  display: flex;
  align-items: center;
  gap: 5px;
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: 0.1em;
  color: var(--muted);
}

.lang-btn {
  padding: 4px 2px;
  color: var(--muted);
  letter-spacing: 0.1em;
  transition: color 0.25s var(--ease);
}

.lang-btn[aria-pressed="true"] { color: var(--ink); font-weight: 500; }
.lang-btn:hover { color: var(--brass-ink); }
.lang-divider { color: var(--line); opacity: 0.75; }

.menu-toggle {
  display: none;
  width: 40px;
  height: 40px;
  margin-right: -8px;
  align-items: center;
  justify-content: center;
  color: var(--ink);
}

.menu-toggle .ico { width: 22px; height: 22px; }
.menu-toggle__close { display: none; }

/* Mobile menu */
.mobile-menu {
  position: fixed;
  inset: 0;
  z-index: 150;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  padding: 0 var(--gutter) 36px;
  background: var(--forest-deep);
  color: var(--bone);
  opacity: 0;
  visibility: hidden;
  transform: translateY(-12px);
  transition:
    opacity 0.4s var(--ease),
    transform 0.4s var(--ease),
    visibility 0.4s;
  overflow-y: auto;
}

.mobile-menu.is-open {
  opacity: 1;
  visibility: visible;
  transform: none;
}

.mobile-menu__head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--nav-h);
  border-bottom: 1px solid var(--line-inv);
  flex: none;
}

.mobile-menu__head .brand__mark { color: var(--bone); }

.menu-close {
  display: inline-flex;
  width: 44px;
  height: 44px;
  margin-right: -10px;
  align-items: center;
  justify-content: center;
  color: var(--bone);
}

.menu-close .ico { width: 24px; height: 24px; }

.mobile-menu__nav {
  display: flex;
  flex-direction: column;
  padding: clamp(20px, 5vh, 44px) 0;
}

.mobile-menu__nav a {
  display: flex;
  align-items: baseline;
  gap: 18px;
  padding: clamp(12px, 2vh, 18px) 0;
  border-bottom: 1px solid var(--line-inv-soft);
  font-size: clamp(1.5rem, 6vw, 2.1rem);
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--bone);
  opacity: 0;
  transform: translateY(14px);
  transition: opacity 0.5s var(--ease), transform 0.5s var(--ease), color 0.3s;
}

.mobile-menu.is-open .mobile-menu__nav a {
  opacity: 1;
  transform: none;
  transition-delay: calc(var(--i) * 60ms + 120ms);
}

.mobile-menu__nav a:hover { color: var(--brass-light); }

.mobile-menu__idx {
  font-family: var(--mono);
  font-size: 10px;
  font-weight: 400;
  letter-spacing: 0.14em;
  color: var(--brass);
}

.mobile-menu__foot {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  flex-wrap: wrap;
  padding-top: 24px;
  border-top: 1px solid var(--line-inv);
}

.mobile-menu__foot .lang-switch { color: rgba(243, 241, 233, 0.7); }
.mobile-menu__foot .lang-btn { color: rgba(243, 241, 233, 0.7); }
.mobile-menu__foot .lang-btn[aria-pressed="true"] { color: var(--bone); }
.mobile-menu__foot .lang-btn:hover { color: var(--brass-light); }
.mobile-menu__foot .lang-divider { color: rgba(243, 241, 233, 0.25); }

.mobile-menu__contact {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: rgba(243, 241, 233, 0.6);
}

.mobile-menu__contact a { color: var(--bone); }

body.menu-open { overflow: hidden; }

/* ── 6. Hero ───────────────────────────────────────────────────────────── */
.hero {
  position: relative;
  padding-top: clamp(44px, 6.5vh, 84px);
  padding-bottom: clamp(52px, 7vw, 96px);
  overflow: hidden;
}

.hero-grid-bg {
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(to right, rgba(17, 61, 52, 0.06) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(17, 61, 52, 0.06) 1px, transparent 1px);
  background-size: 88px 88px;
  -webkit-mask-image: radial-gradient(120% 90% at 72% 10%, #000 0%, transparent 68%);
  mask-image: radial-gradient(120% 90% at 72% 10%, #000 0%, transparent 68%);
}

.hero-grid {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1.02fr) minmax(0, 0.98fr);
  gap: clamp(28px, 4.5vw, 64px);
  align-items: center;
}

.hero-copy { position: relative; z-index: 2; }

.hero-eyebrow { margin-bottom: clamp(24px, 3vw, 36px); }

.hero-title {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 0.06em;
  color: var(--ink);
  font-weight: 900;
  font-size: clamp(2.8rem, 5.5vw, 5.4rem);
  line-height: 1.06;
  letter-spacing: -0.02em;
  font-feature-settings: "palt" 1;
}

.hero-title__line { display: block; }

.hero-title__line--accent {
  width: fit-content;
  color: var(--forest);
  padding-bottom: 0.1em;
  border-bottom: 1px solid var(--brass);
}

html[lang="en"] .hero-title {
  font-weight: 800;
  font-size: clamp(2rem, 3.25vw, 2.95rem);
  line-height: 1.06;
  letter-spacing: -0.035em;
  gap: 0.14em;
}

html[lang="en"] .hero-title__line--accent { padding-bottom: 0.14em; }

.hero-lede {
  max-width: 47ch;
  margin-top: clamp(26px, 3vw, 38px);
  font-size: clamp(14.5px, 1.1vw, 16px);
  line-height: 2;
  color: var(--body);
}

html[lang="en"] .hero-lede { line-height: 1.78; max-width: 52ch; }

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: clamp(18px, 2.4vw, 32px);
  margin-top: clamp(30px, 3.6vw, 44px);
}

.hero-facts {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 28px;
  margin-top: clamp(32px, 4vw, 52px);
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--muted);
}

.hero-facts li {
  position: relative;
  padding-left: 16px;
}

.hero-facts li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 50%;
  width: 6px;
  height: 6px;
  background: var(--brass);
  transform: translateY(-50%) rotate(45deg);
  opacity: 0.85;
}

.hero-visual {
  position: relative;
  margin: 0;
  padding: clamp(18px, 2.2vw, 32px);
}

.hero-visual picture {
  display: block;
}

.hero-visual picture {
  position: relative;
}

.hero-visual picture img {
  width: 100%;
  height: auto;
  mix-blend-mode: multiply;
  filter: contrast(1.03) saturate(1.04);
}

.hero-visual__glow {
  position: absolute;
  inset: 6% 0 8%;
  z-index: 0;
  background: radial-gradient(closest-side, rgba(187, 152, 97, 0.26), rgba(187, 152, 97, 0) 72%);
  filter: blur(10px);
}

.corner {
  position: absolute;
  z-index: 3;
  width: 24px;
  height: 24px;
  border-color: var(--brass);
  border-style: solid;
  opacity: 0.7;
}

.corner--tl { top: 0; left: 0; border-width: 1px 0 0 1px; }
.corner--tr { top: 0; right: 0; border-width: 1px 1px 0 0; }
.corner--bl { bottom: 0; left: 0; border-width: 0 0 1px 1px; }
.corner--br { bottom: 0; right: 0; border-width: 0 1px 1px 0; }

.spec-tag {
  position: absolute;
  z-index: 4;
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 6px 10px;
  background: rgba(247, 246, 241, 0.92);
  border: 1px solid var(--line);
  font-family: var(--mono);
  font-size: 9.5px;
  line-height: 1.4;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ink);
  white-space: nowrap;
  -webkit-backdrop-filter: blur(2px);
  backdrop-filter: blur(2px);
}

.spec-tag__line { width: 24px; height: 1px; background: var(--brass); }

.spec-tag--a { top: 4%; left: -2%; }
.spec-tag--b { top: 40%; right: -3%; flex-direction: row-reverse; }
.spec-tag--c { bottom: 15%; left: 1%; }

.hero-visual__caption {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 10px;
  margin-top: 16px;
  font-family: var(--mono);
  font-size: 9.5px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--muted);
  position: relative;
  z-index: 2;
}

.caption-rule { width: 28px; height: 1px; background: var(--brass); }

/* ── 7. Stats band ─────────────────────────────────────────────────────── */
.stats-band {
  position: relative;
  background: var(--forest);
  color: var(--bone);
  overflow: hidden;
}

.stats-band::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image: linear-gradient(to right, rgba(243, 241, 233, 0.045) 1px, transparent 1px);
  background-size: calc(100% / 12) 100%;
}

.stats-grid {
  position: relative;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
}

.stat {
  padding: clamp(28px, 3.4vw, 44px) clamp(18px, 2.6vw, 34px);
  border-left: 1px solid var(--line-inv);
  transition: background-color 0.3s var(--ease);
}

.stat:first-child { border-left: 0; padding-left: 0; }
.stat:hover { background: rgba(243, 241, 233, 0.035); }

.stat__value {
  display: flex;
  align-items: baseline;
  gap: 0.04em;
  font-family: "Archivo", var(--sans);
  font-weight: 600;
  font-size: clamp(2.5rem, 4.2vw, 3.6rem);
  line-height: 1;
  letter-spacing: -0.03em;
  color: var(--bone);
  font-variant-numeric: tabular-nums;
}

.stat__value .slash {
  margin: 0 0.08em;
  font-weight: 400;
  color: rgba(243, 241, 233, 0.38);
}

.stat__unit {
  margin-left: 0.16em;
  font-family: "Archivo", var(--sans);
  font-size: 0.33em;
  font-weight: 500;
  letter-spacing: 0.06em;
  color: var(--brass-light);
}

.stat__label {
  margin-top: 18px;
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: rgba(243, 241, 233, 0.68);
}

.stat__sub {
  margin-top: 5px;
  font-size: 13px;
  line-height: 1.6;
  color: rgba(243, 241, 233, 0.88);
}

html[lang="en"] .stat__sub { font-size: 12.5px; }

/* ── 8. Marquee ────────────────────────────────────────────────────────── */
.marquee {
  overflow: hidden;
  padding: 15px 0;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background: var(--paper);
}

.marquee__track {
  display: flex;
  width: max-content;
  animation: marquee 46s linear infinite;
}

.marquee:hover .marquee__track { animation-play-state: paused; }

.marquee__group {
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: 0.26em;
  text-transform: uppercase;
  color: var(--muted);
  white-space: nowrap;
}

.marquee__dot {
  margin: 0 1.1em;
  font-size: 7px;
  color: var(--brass);
  vertical-align: middle;
}

@keyframes marquee {
  to { transform: translateX(-50%); }
}

/* ── 9. Section head ───────────────────────────────────────────────────── */
.sec-head {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
  gap: clamp(24px, 4vw, 56px);
  align-items: end;
  margin-bottom: clamp(40px, 5.5vw, 76px);
}

.sec-head__title .eyebrow { margin-bottom: clamp(18px, 2.4vw, 26px); }

.sec-head__lede {
  max-width: 46ch;
  padding-bottom: 4px;
  font-size: clamp(14.5px, 1.05vw, 16px);
  line-height: 1.95;
  color: var(--body);
}

html[lang="en"] .sec-head__lede { line-height: 1.78; }

.section--dark .sec-head__lede { color: rgba(243, 241, 233, 0.68); }

/* ── 10. Capabilities ──────────────────────────────────────────────────── */
.pillars {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: clamp(24px, 3.6vw, 48px);
}

.pillar {
  border-top: 1px solid var(--line);
  padding-top: clamp(20px, 2.4vw, 28px);
  transition: border-color 0.35s var(--ease);
}

.pillar:hover { border-top-color: var(--brass); }

.pillar__top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: clamp(20px, 2.6vw, 32px);
}

.pillar__num {
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: 0.14em;
  color: var(--brass-ink);
}

.pillar__icon {
  width: 26px;
  height: 26px;
  color: var(--forest);
  opacity: 0.85;
  transition: color 0.35s, transform 0.35s var(--ease);
}

.pillar:hover .pillar__icon { color: var(--brass-ink); transform: translateY(-2px); }

.pillar h3 {
  margin-bottom: 12px;
  font-size: clamp(1.18rem, 1.45vw, 1.4rem);
  font-weight: 700;
  line-height: 1.4;
  letter-spacing: -0.01em;
  color: var(--ink);
}

html[lang="en"] .pillar h3 { font-size: clamp(1.1rem, 1.3vw, 1.28rem); }

.pillar p {
  font-size: 14px;
  line-height: 1.95;
  color: var(--body);
}

html[lang="en"] .pillar p { line-height: 1.78; font-size: 13.5px; }

.applicability {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1.45fr) minmax(0, 1fr);
  gap: clamp(26px, 4vw, 56px);
  margin-top: clamp(52px, 6.5vw, 88px);
  padding: clamp(26px, 3.4vw, 44px);
  background: var(--white);
  border: 1px solid var(--line);
}

.applicability::before {
  content: "";
  position: absolute;
  top: -1px;
  left: -1px;
  width: 84px;
  height: 2px;
  background: var(--brass);
}

.applicability__copy .label-mono { margin-bottom: 14px; }

.applicability__copy > p:last-child {
  font-size: 14.5px;
  line-height: 1.95;
  color: var(--body);
}

.chip-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
  align-content: start;
}

.chip {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 14px;
  background: var(--paper);
  border: 1px solid var(--line);
  font-size: 13px;
  font-weight: 500;
  color: var(--ink);
  transition: border-color 0.3s, background-color 0.3s, transform 0.3s var(--ease);
}

.chip .ico { width: 18px; height: 18px; color: var(--brass-ink); }

.chip:hover {
  border-color: var(--brass);
  background: var(--white);
  transform: translateY(-2px);
}

html[lang="en"] .chip { font-size: 12px; }

/* ── 11. Hardware customization (dark) ─────────────────────────────────── */
#customization { overflow: hidden; }

.custom-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.12fr) minmax(0, 0.88fr);
  gap: clamp(36px, 5.5vw, 80px);
  align-items: start;
}

.custom-list { display: flex; flex-direction: column; }

.custom-item {
  display: grid;
  grid-template-columns: 42px minmax(0, 1fr);
  gap: clamp(10px, 1.4vw, 20px);
  padding: clamp(17px, 2vw, 23px) 0;
  border-top: 1px solid var(--line-inv);
  transition: border-color 0.35s var(--ease);
}

.custom-item:last-child { border-bottom: 1px solid var(--line-inv); }

.custom-item__num {
  padding-top: 5px;
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: 0.12em;
  color: #c9a873;
}

.custom-item h3 {
  margin-bottom: 6px;
  font-size: clamp(1.02rem, 1.25vw, 1.18rem);
  font-weight: 700;
  line-height: 1.5;
  letter-spacing: 0;
  transition: color 0.3s;
}

.custom-item p {
  font-size: 13.5px;
  line-height: 1.9;
  color: rgba(243, 241, 233, 0.64);
}

html[lang="en"] .custom-item p { line-height: 1.72; font-size: 13px; }

.custom-item:hover { border-top-color: rgba(187, 152, 97, 0.55); }
.custom-item:hover h3 { color: var(--brass-light); }

.custom-aside { display: flex; flex-direction: column; }

.photo-plate {
  position: relative;
  padding: 13px;
  background: var(--paper);
  border: 1px solid rgba(243, 241, 233, 0.2);
}

.photo-plate__label {
  position: absolute;
  top: -8px;
  left: 12px;
  padding: 0 8px;
  background: var(--forest);
  font-family: var(--mono);
  font-size: 9px;
  letter-spacing: 0.16em;
  color: rgba(243, 241, 233, 0.62);
}

.photo-plate img { width: 100%; background: #fff; }

.photo-plate figcaption {
  margin-top: 12px;
  padding-top: 10px;
  border-top: 1px solid var(--line);
  font-family: var(--mono);
  font-size: 9.5px;
  letter-spacing: 0.1em;
  color: var(--muted);
  text-transform: uppercase;
}

.checklist {
  margin-top: 24px;
  padding: clamp(22px, 2.6vw, 30px);
  background: rgba(243, 241, 233, 0.045);
  border: 1px solid var(--line-inv);
}

.checklist h3 {
  font-size: 1rem;
  font-weight: 700;
  letter-spacing: 0;
}

.checklist__note {
  margin-top: 8px;
  font-size: 12px;
  line-height: 1.8;
  color: rgba(243, 241, 233, 0.7);
}

.checklist ul {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px 16px;
  margin-top: 18px;
}

.checklist li {
  display: flex;
  align-items: flex-start;
  gap: 9px;
  font-size: 12.5px;
  line-height: 1.6;
  color: rgba(243, 241, 233, 0.84);
}

.check-mark {
  position: relative;
  width: 12px;
  height: 12px;
  margin-top: 3px;
  border: 1px solid var(--brass);
  flex: none;
}

.check-mark::after {
  content: "";
  position: absolute;
  inset: 3px;
  background: var(--brass);
  opacity: 0.9;
}

.process {
  margin-top: clamp(48px, 6vw, 80px);
  padding-top: clamp(24px, 3vw, 36px);
  border-top: 1px solid var(--line-inv);
}

.process-steps {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: clamp(20px, 3.5vw, 48px);
  margin-top: clamp(20px, 2.6vw, 30px);
}

.process-step {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  padding-left: clamp(16px, 2vw, 24px);
  border-left: 1px solid var(--line-inv);
}

.process-step:first-child { padding-left: 0; border-left: 0; }

.process-step__num {
  font-family: "Archivo", var(--sans);
  font-size: clamp(1.7rem, 2.3vw, 2.3rem);
  font-weight: 600;
  line-height: 1;
  letter-spacing: -0.02em;
  color: rgba(243, 241, 233, 0.18);
}

.process-step h4 {
  margin-bottom: 4px;
  font-size: 14.5px;
  font-weight: 700;
  letter-spacing: 0;
}

.process-step p {
  font-size: 12.5px;
  line-height: 1.75;
  color: rgba(243, 241, 233, 0.7);
}

/* ── 12. Models & deployment ───────────────────────────────────────────── */
.model-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: clamp(14px, 1.8vw, 22px);
}

.model-card {
  position: relative;
  overflow: hidden;
  padding: clamp(24px, 2.8vw, 36px);
  background: var(--white);
  border: 1px solid var(--line);
  transition:
    border-color 0.4s var(--ease),
    transform 0.4s var(--ease),
    box-shadow 0.4s var(--ease);
}

.model-card::after {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--brass);
  transition: width 0.5s var(--ease);
}

.model-card:hover {
  border-color: rgba(17, 61, 52, 0.24);
  transform: translateY(-4px);
  box-shadow: 0 26px 48px -38px rgba(17, 61, 52, 0.5);
}

.model-card:hover::after { width: 100%; }

.model-card__top {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.model-card__num {
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: 0.14em;
  color: var(--brass-ink);
}

.model-card__icon {
  width: 26px;
  height: 26px;
  color: var(--forest);
  transition: color 0.35s, transform 0.35s var(--ease);
}

.model-card:hover .model-card__icon {
  color: var(--brass-ink);
  transform: translateY(-2px);
}

.model-card h3 {
  margin-top: clamp(18px, 2vw, 26px);
  font-size: clamp(1.18rem, 1.5vw, 1.4rem);
  font-weight: 700;
  line-height: 1.4;
  letter-spacing: -0.01em;
  color: var(--ink);
}

html[lang="en"] .model-card h3 { font-size: clamp(1.1rem, 1.35vw, 1.28rem); }

.model-defs {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-top: clamp(16px, 2vw, 22px);
}

.model-defs > div {
  display: grid;
  grid-template-columns: 72px minmax(0, 1fr);
  gap: 14px;
  align-items: baseline;
  padding-top: 12px;
  border-top: 1px solid var(--line-soft);
}

.model-defs dt {
  font-family: var(--mono);
  font-size: 9px;
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--muted);
}

.model-defs dd {
  font-size: 13.5px;
  line-height: 1.8;
  color: var(--body);
}

html[lang="en"] .model-defs dd { font-size: 13px; line-height: 1.65; }

.deploy { margin-top: clamp(56px, 7vw, 96px); }

.deploy__head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 20px;
  flex-wrap: wrap;
  margin-bottom: clamp(18px, 2.4vw, 28px);
}

.deploy__head h3 {
  font-size: clamp(1.28rem, 1.9vw, 1.7rem);
  font-weight: 700;
  line-height: 1.4;
  letter-spacing: -0.01em;
  color: var(--ink);
}

html[lang="en"] .deploy__head h3 { font-size: clamp(1.2rem, 1.7vw, 1.5rem); }

.deploy__head p { font-size: 13.5px; color: var(--muted); }

.deploy-list { border-top: 1px solid var(--line); }

.deploy-row {
  display: grid;
  grid-template-columns: minmax(250px, 0.85fr) minmax(0, 1.15fr);
  gap: clamp(18px, 3vw, 48px);
  align-items: center;
  padding: clamp(17px, 2.1vw, 24px) clamp(6px, 1vw, 18px);
  border-bottom: 1px solid var(--line);
  transition: background-color 0.3s, padding 0.3s var(--ease);
}

.deploy-row:hover {
  background: var(--white);
  padding-left: clamp(14px, 1.8vw, 26px);
}

.deploy-row__name {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}

.deploy-row__name .ico { width: 19px; height: 19px; color: var(--brass-ink); }

.deploy-row__name > span[data-i18n] {
  font-size: 16px;
  font-weight: 700;
  line-height: 1.5;
  color: var(--ink);
}

html[lang="en"] .deploy-row__en { display: none; }

.deploy-row__en {
  font-family: var(--mono);
  font-size: 9px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--muted);
}

.deploy-row > p {
  font-size: 13.5px;
  line-height: 1.8;
  color: var(--body);
}

.footnote {
  max-width: 92ch;
  margin-top: clamp(20px, 2.4vw, 28px);
  font-size: 12px;
  line-height: 1.9;
  color: var(--muted);
}

/* ── 13. Specifications ────────────────────────────────────────────────── */
.spec-table-wrap {
  overflow-x: auto;
  background: var(--white);
  border: 1px solid var(--line);
}

.spec-table {
  width: 100%;
  min-width: 680px;
  border-collapse: collapse;
  font-variant-numeric: tabular-nums;
}

.spec-table thead th {
  padding: 16px clamp(14px, 2vw, 24px);
  background: var(--forest);
  color: var(--bone);
  font-family: var(--mono);
  font-size: 9.5px;
  font-weight: 500;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  text-align: left;
  white-space: nowrap;
}

.spec-table .col-idx { width: 62px; }

.spec-table tbody tr {
  border-bottom: 1px solid var(--line-soft);
  transition: background-color 0.25s;
}

.spec-table tbody tr:last-child { border-bottom: 0; }
.spec-table tbody tr:nth-child(even) { background: rgba(241, 243, 238, 0.5); }
.spec-table tbody tr:hover { background: var(--white); }

.spec-table tbody th,
.spec-table td {
  padding: clamp(13px, 1.5vw, 17px) clamp(14px, 2vw, 24px);
  text-align: left;
  vertical-align: top;
  font-weight: 400;
}

.spec-table tbody th {
  font-size: 14px;
  font-weight: 700;
  line-height: 1.6;
  color: var(--ink);
  white-space: nowrap;
}

.spec-table .cell-idx {
  padding-top: calc(clamp(13px, 1.5vw, 17px) + 3px);
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.08em;
  color: var(--brass-ink);
}

.spec-table .cell-value {
  font-family: "Archivo", "Noto Sans TC", var(--sans);
  font-size: 14px;
  font-weight: 600;
  line-height: 1.6;
  color: var(--forest);
  white-space: nowrap;
}

html[lang="en"] .spec-table .cell-value { font-size: 13.5px; }

.spec-table td:last-child {
  font-size: 13px;
  line-height: 1.75;
  color: var(--muted);
}

.spec-notes {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: clamp(24px, 3.5vw, 48px);
  margin-top: clamp(44px, 5.5vw, 72px);
}

.spec-note {
  padding-top: 22px;
  border-top: 1px solid var(--line);
}

.spec-note__num {
  display: block;
  margin-bottom: 12px;
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: 0.12em;
  color: var(--brass-ink);
}

.spec-note h3 {
  margin-bottom: 10px;
  font-size: 1rem;
  font-weight: 700;
  line-height: 1.6;
  letter-spacing: 0;
  color: var(--ink);
}

html[lang="en"] .spec-note h3 { font-size: 0.95rem; }

.spec-note p {
  font-size: 13px;
  line-height: 1.95;
  color: var(--body);
}

html[lang="en"] .spec-note p { line-height: 1.75; }

.disclaimer {
  margin-top: clamp(36px, 4.5vw, 56px);
  padding-top: 20px;
  border-top: 1px solid var(--line);
  font-family: var(--mono);
  font-size: 10px;
  line-height: 1.9;
  letter-spacing: 0.04em;
  color: var(--muted);
}

/* ── 14. Contact ───────────────────────────────────────────────────────── */
.section--contact { overflow: hidden; }

.contact-glow {
  position: absolute;
  top: -22%;
  right: -12%;
  width: 62vw;
  height: 62vw;
  max-width: 900px;
  max-height: 900px;
  pointer-events: none;
  background: radial-gradient(closest-side, rgba(187, 152, 97, 0.17), rgba(187, 152, 97, 0) 70%);
}

.contact-grid {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
  gap: clamp(36px, 6vw, 88px);
  align-items: center;
}

.contact-copy h2 {
  margin-top: clamp(22px, 3vw, 30px);
  font-size: clamp(2rem, 3.8vw, 3.5rem);
  line-height: 1.2;
  letter-spacing: -0.015em;
}

html[lang="en"] .contact-copy h2 {
  font-size: clamp(1.9rem, 3.3vw, 3rem);
  letter-spacing: -0.03em;
  line-height: 1.12;
}

.contact-lede {
  max-width: 42ch;
  margin-top: clamp(20px, 2.4vw, 28px);
  font-size: 15.5px;
  line-height: 1.9;
  color: rgba(243, 241, 233, 0.74);
}

.contact-note {
  margin-top: clamp(26px, 3vw, 36px);
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: rgba(243, 241, 233, 0.68);
}

.contact-card {
  position: relative;
  padding: clamp(28px, 3.6vw, 46px);
  background: rgba(243, 241, 233, 0.045);
  border: 1px solid rgba(243, 241, 233, 0.22);
  -webkit-backdrop-filter: blur(4px);
  backdrop-filter: blur(4px);
}

.contact-card::before {
  content: "";
  position: absolute;
  top: -1px;
  left: -1px;
  width: 96px;
  height: 2px;
  background: var(--brass);
}

.label-mono--brass { color: var(--brass-light); }

.contact-name {
  margin-top: 16px;
  font-size: clamp(1.5rem, 2vw, 1.8rem);
  font-weight: 700;
  line-height: 1.3;
  letter-spacing: 0.02em;
  color: var(--bone);
}

.contact-phone {
  display: flex;
  align-items: baseline;
  gap: 12px;
  margin-top: 8px;
  padding: 16px 0 20px;
  border-bottom: 1px solid var(--line-inv);
}

.contact-phone__label {
  font-family: var(--mono);
  font-size: 9.5px;
  letter-spacing: 0.16em;
  color: rgba(243, 241, 233, 0.62);
}

.contact-phone__number {
  font-family: "Archivo", var(--sans);
  font-size: clamp(1.6rem, 2.5vw, 2.2rem);
  font-weight: 600;
  line-height: 1.2;
  letter-spacing: 0.01em;
  color: var(--bone);
  font-variant-numeric: tabular-nums;
  transition: color 0.3s;
}

.contact-phone:hover .contact-phone__number { color: var(--brass-light); }

.contact-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: clamp(22px, 2.6vw, 30px);
}

.contact-micro {
  margin-top: 20px;
  font-size: 12px;
  line-height: 1.85;
  color: rgba(243, 241, 233, 0.7);
}

.contact-foot {
  margin-top: 24px;
  padding-top: 16px;
  border-top: 1px solid var(--line-inv);
  font-family: var(--mono);
  font-size: 9.5px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: rgba(243, 241, 233, 0.62);
}

/* ── 15. Footer ────────────────────────────────────────────────────────── */
.site-footer {
  padding-top: clamp(48px, 6vw, 80px);
  background: var(--paper);
  border-top: 1px solid var(--line);
}

.footer-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.6fr) minmax(0, 0.7fr) minmax(0, 0.7fr);
  gap: clamp(28px, 4vw, 64px);
  padding-bottom: clamp(36px, 5vw, 64px);
}

.brand--footer .brand__mark { font-size: 18px; }
.brand--footer .brand__meta { margin-top: 2px; }

.footer-legal {
  margin-top: 18px;
  font-size: 12px;
  line-height: 1.9;
  color: var(--muted);
}

.footer-legal__en {
  font-family: var(--mono);
  font-size: 9.5px;
  letter-spacing: 0.06em;
}

.footer-tagline {
  margin-top: 14px;
  font-family: var(--mono);
  font-size: 9.5px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--brass-ink);
}

.footer-title {
  margin-bottom: 16px;
  font-family: var(--mono);
  font-size: 9.5px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--muted);
}

.footer-nav {
  display: flex;
  flex-direction: column;
  gap: 9px;
}

.footer-nav a,
.footer-contact p,
.footer-contact a {
  font-size: 13px;
  color: var(--body);
}

.footer-nav a,
.footer-contact a { transition: color 0.25s; }
.footer-nav a:hover,
.footer-contact a:hover { color: var(--brass-ink); }

.footer-contact a {
  display: inline-block;
  margin-top: 6px;
  font-family: var(--mono);
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--ink);
}

.footer-contact__note {
  margin-top: 10px;
  font-family: var(--mono);
  font-size: 9.5px !important;
  letter-spacing: 0.08em;
  color: var(--muted) !important;
}

.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px 28px;
  flex-wrap: wrap;
  padding-block: 22px;
  border-top: 1px solid var(--line);
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.04em;
  color: var(--muted);
}

.footer-disclaimer {
  max-width: 50ch;
  text-align: center;
}

.to-top {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ink);
}

.to-top .ico { width: 14px; height: 14px; transition: transform 0.3s var(--ease); }
.to-top:hover .ico { transform: translateY(-3px); }

/* ── 16. Reveal animation ──────────────────────────────────────────────── */
.js [data-reveal] {
  opacity: 0;
  transform: translateY(22px);
  transition: opacity 0.9s var(--ease), transform 0.9s var(--ease);
}

.js [data-reveal].is-in {
  opacity: 1;
  transform: none;
}

.js.reveal-fallback [data-reveal] {
  opacity: 1 !important;
  transform: none !important;
}

/* ── 17. Responsive ────────────────────────────────────────────────────── */
@media (max-width: 1180px) {
  .spec-tag--a { left: 0; }
  .spec-tag--b { right: -1%; }
  .spec-tag { font-size: 9px; }
}

@media (max-width: 1080px) {
  .spec-tag { display: none; }
  .hero-grid { grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr); }
}

@media (max-width: 960px) {
  :root { --nav-h: 68px; }

  .main-nav,
  .header-cta { display: none; }

  .menu-toggle { display: inline-flex; }
  .header-actions { margin-left: auto; }

  .hero { padding-top: clamp(36px, 5vh, 56px); }
  .hero-grid { grid-template-columns: minmax(0, 1fr); gap: clamp(28px, 5vw, 48px); }

  .hero-visual {
    width: min(100%, 620px);
    margin-inline: auto;
    order: 2;
  }

  .hero-copy { order: 1; }
  .hero-lede { max-width: 58ch; }

  .sec-head { grid-template-columns: minmax(0, 1fr); gap: 22px; }
  .sec-head__lede { max-width: 60ch; padding-bottom: 0; }

  .custom-grid { grid-template-columns: minmax(0, 1fr); }
  .custom-aside { order: -1; }
  .photo-plate { max-width: 560px; margin-inline: auto; }

  .contact-grid { grid-template-columns: minmax(0, 1fr); }
  .contact-copy h2 br { display: none; }
  html[lang="en"] .contact-copy h2 br { display: inline; }
  .contact-card { max-width: 580px; }

  .footer-grid { grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); }
  .footer-brand { grid-column: 1 / -1; }
}

@media (max-width: 900px) {
  .pillars { grid-template-columns: minmax(0, 1fr); gap: 0; }
  .pillar {
    padding-block: clamp(20px, 3vw, 26px);
    padding-top: clamp(20px, 3vw, 26px);
    border-top: 1px solid var(--line);
  }
  .pillar:first-child { border-top: 1px solid var(--line); }
  .pillar__top { margin-bottom: 14px; }
  .pillar p { max-width: 62ch; }

  .applicability { grid-template-columns: minmax(0, 1fr); }

  .spec-notes { grid-template-columns: minmax(0, 1fr); gap: 0; }
  .spec-note {
    padding-block: 22px;
    border-top: 1px solid var(--line);
  }
  .spec-note:first-child { border-top: 1px solid var(--line); }

  .process-steps { grid-template-columns: minmax(0, 1fr); gap: 0; }
  .process-step {
    padding: 18px 0;
    padding-left: 0;
    border-left: 0;
    border-top: 1px solid var(--line-inv);
  }
  .process-step:first-child { border-top: 1px solid var(--line-inv); }

  .model-grid { grid-template-columns: minmax(0, 1fr); }

  .deploy-row {
    grid-template-columns: minmax(0, 1fr);
    gap: 8px;
    align-items: start;
  }
}

@media (max-width: 760px) {
  .section { padding-block: clamp(64px, 11vw, 96px); }

  .stats-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .stat {
    border-left: 0;
    border-top: 1px solid var(--line-inv);
    padding-inline: 0;
    padding-block: clamp(22px, 4vw, 30px);
  }
  .stat:nth-child(2n) { padding-left: clamp(18px, 4vw, 28px); }
  .stat:nth-child(odd) { padding-right: clamp(18px, 4vw, 28px); }
  .stat:first-child { border-top: 0; }
  .stat:nth-child(2) { border-top: 0; }
  .stat:nth-child(2) { border-left: 1px solid var(--line-inv); }
  .stat:nth-child(4) { border-left: 1px solid var(--line-inv); }

  .hero-title { font-size: clamp(2.55rem, 10.5vw, 3.6rem); }
  html[lang="en"] .hero-title { font-size: clamp(1.95rem, 8vw, 2.75rem); }

  .hero-actions {
    gap: 16px;
    align-items: stretch;
    flex-direction: column;
  }
  .hero-actions .btn { width: 100%; }
  .hero-actions .link-arrow { justify-content: center; }
  .hero-facts { gap: 8px 20px; }

  /* Specs table → stacked cards */
  .spec-table-wrap { overflow: visible; background: transparent; border: 0; }
  .spec-table { min-width: 0; display: block; }
  .spec-table thead { display: none; }
  .spec-table tbody { display: block; }
  .spec-table tbody tr {
    position: relative;
    display: block;
    margin-bottom: 12px;
    padding: 16px 18px;
    background: var(--white) !important;
    border: 1px solid var(--line);
  }
  .spec-table tbody th,
  .spec-table td { display: block; padding: 0; white-space: normal; }
  .spec-table .cell-idx {
    position: absolute;
    top: 16px;
    right: 18px;
    padding: 0;
    font-size: 9.5px;
  }
  .spec-table tbody th {
    padding-right: 40px;
    margin-bottom: 10px;
    font-size: 14.5px;
  }
  .spec-table .cell-value { margin-bottom: 10px; }
  .spec-table td:last-child {
    padding-top: 10px;
    border-top: 1px dashed var(--line);
  }
  .spec-table td[data-label]::before {
    content: attr(data-label);
    display: block;
    margin-bottom: 3px;
    font-family: var(--mono);
    font-size: 8.5px;
    letter-spacing: 0.12em;
    color: var(--muted);
    text-transform: uppercase;
  }
  html[lang="en"] .spec-table td[data-label="參考參數"]::before { content: "Reference"; }
  html[lang="en"] .spec-table td[data-label="選型說明"]::before { content: "Selection notes"; }
  .spec-table .cell-idx[data-label]::before { display: none; }
}

@media (max-width: 640px) {
  .brand__meta { display: none; }
  .lang-switch { font-size: 10px; }

  .hero-facts { font-size: 9.5px; letter-spacing: 0.14em; }
  .hero-visual { padding: 14px; }

  .applicability { padding: 22px; }
  .chip-grid { grid-template-columns: minmax(0, 1fr); }

  .custom-item { grid-template-columns: 32px minmax(0, 1fr); }
  .checklist ul { grid-template-columns: minmax(0, 1fr); }

  .deploy-row { padding-inline: 0; }
  .deploy-row:hover { padding-left: 10px; }

  .contact-phone { flex-direction: column; gap: 6px; align-items: flex-start; }

  .footer-grid { grid-template-columns: minmax(0, 1fr); gap: 30px; }
  .footer-bottom { flex-direction: column; align-items: flex-start; gap: 14px; }
  .footer-disclaimer { text-align: left; }

  .marquee__group { font-size: 9.5px; letter-spacing: 0.2em; }

  .eyebrow {
    gap: 10px;
    font-size: 9.5px;
    letter-spacing: 0.1em;
  }
  .eyebrow::before { width: 24px; }
  .eyebrow__desc { display: none; }
  .hero-eyebrow .eyebrow__text { letter-spacing: 0.14em; }

  .hero-actions .link-arrow { align-self: center; }

  .photo-plate { max-width: none; }
}

@media (max-width: 420px) {
  .stat__value { font-size: clamp(2.2rem, 10vw, 2.7rem); }
  .contact-card { padding: 24px 20px; }
  .contact-phone__number { font-size: 1.55rem; }
  .btn { padding: 15px 20px; font-size: 13px; }
}

/* ── 18. Motion & print preferences ────────────────────────────────────── */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }

  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    transition-delay: 0ms !important;
  }

  .js [data-reveal] {
    opacity: 1 !important;
    transform: none !important;
  }

  .marquee__track { animation: none; }
}

@media print {
  .site-header,
  .mobile-menu,
  .scroll-progress,
  .marquee,
  .hero-actions,
  .contact-actions { display: none !important; }

  body { background: #fff; color: #111; }
  .section--dark { background: #fff; color: #111; }
  .section--dark h2,
  .section--dark h3 { color: #111; }
}