:root {
  --bg: #11100d;
  --bg-soft: #1a1712;
  --panel: #f3eee4;
  --panel-deep: #d9c7a2;
  --text: #f7f1e7;
  --muted: #b6ab99;
  --ink: #211d17;
  --gold: #d6ad62;
  --gold-deep: #9b7134;
  --line: rgba(255, 255, 255, 0.12);
  --shadow: 0 24px 80px rgba(0, 0, 0, 0.35);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background:
    radial-gradient(circle at 70% 0%, rgba(214, 173, 98, 0.14), transparent 32rem),
    linear-gradient(180deg, #0d0c0a 0%, var(--bg) 42%, #17130f 100%);
  color: var(--text);
  font-family: "Noto Serif TC", serif;
  line-height: 1.8;
}

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

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
  padding: 1.25rem clamp(1.25rem, 4vw, 4rem);
  border-bottom: 1px solid transparent;
  transition: background 0.25s ease, border-color 0.25s ease, padding 0.25s ease;
}

.site-header.is-scrolled {
  padding-block: 0.75rem;
  background: rgba(17, 16, 13, 0.82);
  border-color: var(--line);
  backdrop-filter: blur(18px);
}

.brand {
  display: inline-flex;
  align-items: center;
  width: clamp(11.5rem, 14vw, 15rem);
  flex: 0 0 auto;
}

.brand-logo {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 364 / 134;
  object-fit: contain;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: clamp(1rem, 2vw, 2rem);
  color: rgba(247, 241, 231, 0.82);
  font-size: 0.9rem;
}

.site-nav a {
  position: relative;
  white-space: nowrap;
}

.site-nav > a::after,
.nav-group > a::after {
  position: absolute;
  left: 0;
  bottom: -0.35rem;
  width: 0;
  height: 1px;
  background: var(--gold);
  content: "";
  transition: width 0.2s ease;
}

.site-nav > a:hover::after,
.nav-group:hover > a::after {
  width: 100%;
}

.nav-group {
  position: relative;
  padding-block: 0.75rem;
  margin-block: -0.75rem;
}

.nav-group > a {
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
}

.nav-group > a::before {
  order: 2;
  color: var(--gold);
  font-size: 0.7rem;
  content: "⌄";
}

.nav-submenu {
  position: absolute;
  top: 100%;
  left: 50%;
  display: grid;
  min-width: 9rem;
  padding: 0.65rem;
  background: rgba(17, 16, 13, 0.94);
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
  opacity: 0;
  pointer-events: none;
  transform: translate(-50%, 0.25rem);
  transition: opacity 0.2s ease, transform 0.2s ease;
}

.nav-submenu a {
  padding: 0.45rem 0.65rem;
  color: rgba(247, 241, 231, 0.82);
}

.nav-submenu a:hover {
  color: var(--gold);
}

.nav-group:hover .nav-submenu,
.nav-group:focus-within .nav-submenu {
  opacity: 1;
  pointer-events: auto;
  transform: translate(-50%, 0);
}

.nav-toggle {
  display: none;
}

.hero {
  position: relative;
  display: flex;
  min-height: 100vh;
  align-items: flex-end;
  justify-content: flex-end;
  overflow: hidden;
  padding: 9rem clamp(1.25rem, 6vw, 7rem) 3.8rem;
}

.hero::after {
  position: absolute;
  inset: 0;
  z-index: 1;
  background:
    linear-gradient(90deg, rgba(7, 7, 6, 0.88) 0%, rgba(7, 7, 6, 0.58) 38%, rgba(7, 7, 6, 0.1) 72%),
    linear-gradient(180deg, rgba(7, 7, 6, 0.56) 0%, transparent 34%, rgba(7, 7, 6, 0.72) 100%);
  content: "";
}

.hero-copy {
  position: relative;
  z-index: 3;
  width: min(100%, 42rem);
  margin-left: auto;
  text-align: left;
}

.hero-copy .eyebrow {
  font-size: 0.78rem;
  letter-spacing: 0.24em;
}

.eyebrow {
  margin: 0 0 1rem;
  color: var(--gold);
  font-family: "Noto Serif TC", serif;
  font-size: 0.95rem;
  letter-spacing: 0.28em;
  text-transform: uppercase;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1,
h2 {
  font-weight: 500;
  letter-spacing: 0.06em;
  line-height: 1.35;
}

h1 {
  max-width: none;
  margin-bottom: 1.1rem;
  font-size: 28px;
}

h1 span {
  display: block;
}

h2 {
  margin-bottom: 1.25rem;
  font-size: clamp(2rem, 4vw, 4.4rem);
}

h3 {
  margin-bottom: 0.85rem;
  font-size: 1.35rem;
  font-weight: 500;
  letter-spacing: 0.08em;
}

.hero-copy p:not(.eyebrow),
.case-copy p,
.koizumi p,
.about-grid p,
.service-grid p {
  color: var(--muted);
}

.hero-copy p:not(.eyebrow) {
  max-width: 34em;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-top: 2rem;
}

.button {
  display: inline-flex;
  min-width: 9.5rem;
  justify-content: center;
  padding: 0.75rem 1.35rem;
  border: 1px solid var(--gold);
  background: var(--gold);
  color: #17110a;
  letter-spacing: 0.12em;
  transition: transform 0.2s ease, background 0.2s ease;
}

.button:hover {
  transform: translateY(-2px);
}

.button.ghost {
  background: transparent;
  color: var(--gold);
}

.button.dark {
  color: var(--ink);
}

.hero-visual {
  position: absolute;
  inset: 0;
  z-index: 0;
}

.hero-visual::before {
  position: absolute;
  inset: 0;
  z-index: 1;
  background: radial-gradient(circle, rgba(255, 222, 153, 0.42), transparent 68%);
  content: "";
  filter: blur(28px);
  opacity: 0.42;
}

.hero-visual video {
  width: 100%;
  height: 100%;
  object-fit: cover;
  background: #0d0c0a;
}

.section {
  padding: clamp(4rem, 9vw, 9rem) clamp(1.25rem, 6vw, 7rem);
}

.section-heading {
  max-width: 36rem;
}

.section-heading.centered {
  margin-inline: auto;
  text-align: center;
}

.about {
  display: grid;
  grid-template-columns: minmax(0, 0.75fr) minmax(0, 1fr);
  gap: clamp(2rem, 7vw, 8rem);
  border-top: 1px solid var(--line);
}

.about-grid {
  display: grid;
  gap: 1.5rem;
  align-content: start;
  padding-top: 1rem;
}

.text-link {
  width: fit-content;
  color: var(--gold);
  letter-spacing: 0.12em;
}

.gallery-strip {
  display: grid;
  grid-template-columns: repeat(6, minmax(11rem, 1fr));
  gap: 1px;
  padding-inline: clamp(1.25rem, 6vw, 7rem);
}

.gallery-card {
  position: relative;
  display: flex;
  min-height: 24rem;
  align-items: end;
  overflow: hidden;
  padding: 1.25rem;
  background: #0d0c0a;
}

.gallery-card::before {
  position: absolute;
  inset: 0;
  z-index: 1;
  background:
    linear-gradient(180deg, transparent 38%, rgba(0, 0, 0, 0.72)),
    linear-gradient(110deg, rgba(255, 255, 255, 0.12), transparent 38%);
  content: "";
}

.gallery-card img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  transform: scale(1.02);
  transition: transform 0.45s ease, opacity 0.45s ease;
}

.gallery-card:hover img {
  opacity: 0.86;
  transform: scale(1.08);
}

.gallery-card span {
  position: relative;
  z-index: 2;
  color: rgba(247, 241, 231, 0.86);
  font-family: "Noto Serif TC", serif;
  font-size: 1.35rem;
  letter-spacing: 0.18em;
}

.gallery-card.tall {
  transform: translateY(-2rem);
}

.case-carousel {
  padding-inline: 0;
}

.carousel-viewport {
  overflow: hidden;
  background: transparent;
}

.carousel-track {
  display: flex;
  gap: clamp(0.65rem, 1vw, 1rem);
  will-change: transform;
}

.carousel-track.is-animated {
  animation: carousel-scroll 70s linear infinite;
}

.case-carousel:hover .carousel-track.is-animated {
  animation-play-state: paused;
}

@keyframes carousel-scroll {
  from {
    transform: translateX(0);
  }

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

.carousel-slide {
  position: relative;
  flex: 0 0 clamp(10rem, 16.5vw, 22rem);
  height: clamp(13rem, 22vw, 20rem);
  overflow: hidden;
  background: #0d0c0a;
}

.carousel-slide::before {
  display: none;
}

.carousel-slide img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: opacity 0.25s ease, transform 0.5s ease;
}

.carousel-slide:hover img {
  opacity: 0.86;
  transform: scale(1.05);
}

.carousel-slide span {
  display: none;
}

.carousel-controls {
  display: none;
  justify-content: center;
  align-items: center;
  gap: 1rem;
  margin-top: 1.1rem;
}

.carousel-button {
  display: grid;
  width: 2.8rem;
  height: 2.8rem;
  place-items: center;
  border: 1px solid rgba(214, 173, 98, 0.45);
  border-radius: 999px;
  background: rgba(17, 16, 13, 0.78);
  color: var(--gold);
  font-size: 1.6rem;
  line-height: 1;
  cursor: pointer;
  transition: background 0.2s ease, color 0.2s ease, border-color 0.2s ease;
}

.carousel-button:hover {
  border-color: var(--gold);
  background: var(--gold);
  color: var(--ink);
}

.carousel-status {
  min-width: 5.2rem;
  color: var(--muted);
  text-align: center;
  letter-spacing: 0.12em;
}

.history {
  display: grid;
  grid-template-columns: minmax(0, 0.75fr) minmax(0, 1fr);
  gap: clamp(2rem, 7vw, 8rem);
  align-items: start;
  border-top: 1px solid var(--line);
}

.history .section-heading {
  margin-inline: 0;
  text-align: left;
}

.timeline {
  position: relative;
  display: grid;
  gap: 2.2rem;
  max-width: none;
  margin: 0;
}

.timeline::before {
  position: absolute;
  top: 1.4rem;
  bottom: 1.4rem;
  left: 1rem;
  width: 1px;
  background: rgba(214, 173, 98, 0.36);
  content: "";
}

.timeline article {
  position: relative;
  display: grid;
  width: 100%;
  padding-block: 1rem;
  transition: transform 0.28s ease, opacity 0.28s ease;
  opacity: 0.72;
  outline: 0;
}

.timeline article:nth-child(odd) {
  margin-left: 0;
  padding-left: 3.5rem;
}

.timeline article:nth-child(even) {
  padding-right: 0;
  padding-left: 3.5rem;
  text-align: left;
}

.timeline article::before {
  position: absolute;
  top: 0.9rem;
  width: 2rem;
  height: 2rem;
  border: 0.55rem solid rgba(247, 241, 231, 0.2);
  border-radius: 999px;
  background: rgba(214, 173, 98, 0.62);
  content: "";
  box-sizing: border-box;
  transition: border-color 0.28s ease, background 0.28s ease, box-shadow 0.28s ease, transform 0.28s ease;
}

.timeline article:nth-child(odd)::before {
  left: 1rem;
  transform: translateX(-50%);
}

.timeline article:nth-child(even)::before {
  left: 1rem;
  right: auto;
  transform: translateX(-50%);
}

.timeline time {
  display: block;
  margin-bottom: 0.8rem;
  color: var(--text);
  font-family: "Noto Serif TC", serif;
  font-size: clamp(1.8rem, 3vw, 2.7rem);
  letter-spacing: 0.08em;
  transition: color 0.28s ease, text-shadow 0.28s ease;
}

.timeline ul {
  display: grid;
  gap: 0.35rem;
  margin: 0;
  padding-left: 1.25rem;
}

.timeline li {
  color: var(--muted);
  transition: color 0.28s ease;
}

.timeline article:hover,
.timeline article:focus-visible,
.timeline article.is-active {
  opacity: 1;
  transform: translateY(-0.25rem);
}

.timeline article:hover::before,
.timeline article:focus-visible::before,
.timeline article.is-active::before {
  border-color: rgba(214, 173, 98, 0.24);
  background: var(--gold);
  box-shadow: 0 0 0 0.6rem rgba(214, 173, 98, 0.1), 0 0 2.8rem rgba(214, 173, 98, 0.38);
}

.timeline article:hover time,
.timeline article:focus-visible time,
.timeline article.is-active time {
  color: var(--gold);
  text-shadow: 0 0 2rem rgba(214, 173, 98, 0.22);
}

.timeline article:hover li,
.timeline article:focus-visible li,
.timeline article.is-active li {
  color: rgba(247, 241, 231, 0.9);
}

.services {
  background: linear-gradient(180deg, transparent, rgba(255, 255, 255, 0.03));
}

.services-intro {
  display: grid;
  grid-template-columns: minmax(0, 0.75fr) minmax(0, 1fr);
  gap: clamp(2rem, 7vw, 8rem);
  align-items: start;
}

.service-items {
  display: grid;
  gap: 1.5rem;
  max-width: 42rem;
  margin: 1rem 0 0;
  text-align: left;
}

.service-copy p {
  margin: 0;
  color: var(--muted);
}

.service-items ul {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-start;
  gap: 0.75rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.service-items li {
  padding: 0.45rem 0.8rem;
  border: 1px solid rgba(214, 173, 98, 0.28);
  color: rgba(247, 241, 231, 0.78);
  background: rgba(17, 16, 13, 0.46);
}

.service-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: clamp(1.25rem, 3vw, 2rem);
  margin-top: 3rem;
}

.service-grid article {
  min-height: 16rem;
  padding: clamp(1rem, 2.5vw, 1.75rem) 0;
  background: transparent;
}

.service-grid h3 {
  display: flex;
  gap: 0.85rem;
  align-items: center;
}

.service-icon {
  display: inline-grid;
  width: 2.4rem;
  height: 2.4rem;
  flex: 0 0 auto;
  place-items: center;
  border: 1px solid rgba(214, 173, 98, 0.45);
  border-radius: 999px;
}

.service-icon svg {
  width: 1.25rem;
  height: 1.25rem;
  fill: none;
  stroke: var(--gold);
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-width: 1.55;
}

.service-grid p {
  padding-left: 3.25rem;
}

.philosophy {
  display: grid;
  grid-template-columns: minmax(0, 0.55fr) minmax(0, 1.45fr);
  gap: clamp(2rem, 7vw, 8rem);
  align-items: start;
  border-top: 1px solid var(--line);
}

.philosophy-content {
  display: grid;
  gap: 2rem;
  align-content: start;
}

.philosophy-kicker {
  margin: 0;
  color: var(--gold);
  letter-spacing: 0.12em;
}

.philosophy-copy {
  display: grid;
  gap: 0.45rem;
}

.philosophy-principles {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: clamp(2rem, 4vw, 3rem);
}

.philosophy-principles article {
  display: grid;
  gap: 1.2rem;
}

.philosophy-copy h3 {
  margin: 0 0 0.4rem;
  color: rgba(247, 241, 231, 0.92);
  font-size: clamp(1.2rem, 1.8vw, 1.55rem);
  font-weight: 500;
  letter-spacing: 0.08em;
}

.philosophy-copy p {
  margin: 0;
  color: var(--muted);
  line-height: 1.95;
}

.philosophy-image {
  margin: 1rem 0 0;
  max-width: none;
  padding: 0;
  overflow: hidden;
  background: rgba(17, 16, 13, 0.72);
  border: 1px solid rgba(214, 173, 98, 0.28);
}

.philosophy-image img {
  display: block;
  width: 100%;
  height: auto;
}

.philosophy-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: clamp(1.5rem, 4vw, 3rem);
  margin-top: clamp(2rem, 5vw, 4rem);
}

.principle-card {
  display: grid;
  gap: 1.5rem;
  padding: clamp(1.25rem, 3vw, 2rem);
  border: 1px solid rgba(214, 173, 98, 0.2);
  background: rgba(247, 241, 231, 0.035);
}

.principle-copy h3 {
  display: flex;
  gap: 0.75rem;
  align-items: center;
  margin: 0 0 1rem;
  color: rgba(247, 241, 231, 0.92);
  font-size: clamp(1.05rem, 1.5vw, 1.3rem);
}

.principle-copy h3 span {
  width: 0.9rem;
  height: 0.9rem;
  flex: 0 0 auto;
  background: var(--gold);
}

.principle-copy p {
  margin: 0.55rem 0;
  color: var(--muted);
  line-height: 1.9;
}

.circadian-visual {
  display: grid;
  gap: 1.1rem;
}

.sky {
  position: relative;
  min-height: 23rem;
  overflow: hidden;
  border: 1px solid rgba(247, 241, 231, 0.16);
  background:
    radial-gradient(circle at 64% 28%, rgba(255, 193, 49, 0.95) 0 2.7rem, transparent 2.8rem),
    linear-gradient(180deg, rgba(117, 201, 240, 0.95) 0 48%, rgba(244, 182, 62, 0.95) 48% 100%);
}

.sky::before {
  content: "";
  position: absolute;
  inset: 38% 10% auto;
  height: 52%;
  border-radius: 50% 50% 0 0;
  background: linear-gradient(180deg, rgba(246, 250, 255, 0.94) 0 45%, rgba(11, 53, 104, 0.9) 45% 100%);
}

.sky::after {
  content: "2000K   3000K   4000K   5000K   6000K   7000K   8000K";
  position: absolute;
  top: 0.75rem;
  right: 0.7rem;
  writing-mode: vertical-rl;
  color: rgba(17, 16, 13, 0.72);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
}

.bubble {
  position: absolute;
  z-index: 2;
  display: grid;
  place-items: center;
  width: 9rem;
  height: 9rem;
  border-radius: 50%;
  color: white;
  font-size: 1.15rem;
  font-weight: 700;
  text-align: center;
}

.bubble small {
  display: block;
  margin-top: 0.2rem;
  font-size: 0.72rem;
  font-weight: 400;
}

.bubble.active {
  top: 2.4rem;
  left: 1rem;
  background: #19b9df;
}

.bubble.rest {
  bottom: 2.2rem;
  left: 1rem;
  background: #f5a58e;
}

.clock {
  position: absolute;
  z-index: 3;
  left: 50%;
  top: 50%;
  width: 9rem;
  height: 9rem;
  transform: translate(-50%, -50%);
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.94);
  box-shadow: 0 1rem 3rem rgba(0, 0, 0, 0.18);
}

.clock span {
  position: absolute;
  color: #222;
  font-size: 0.9rem;
}

.clock span:nth-child(1) { top: 1rem; left: 50%; transform: translateX(-50%); }
.clock span:nth-child(2) { right: 1rem; top: 50%; transform: translateY(-50%); }
.clock span:nth-child(3) { bottom: 1rem; left: 50%; transform: translateX(-50%); }
.clock span:nth-child(4) { left: 1rem; top: 50%; transform: translateY(-50%); }

.clock b {
  position: absolute;
  left: 50%;
  top: 50%;
  width: 0.35rem;
  height: 0.35rem;
  border-radius: 999px;
  background: #222;
  transform: translate(-50%, -50%);
}

.clock b::before,
.clock b::after {
  content: "";
  position: absolute;
  left: 50%;
  bottom: 50%;
  width: 0.25rem;
  border-radius: 999px;
  background: #222;
  transform-origin: bottom;
}

.clock b::before {
  height: 2.3rem;
  transform: translateX(-50%) rotate(-60deg);
}

.clock b::after {
  height: 2.9rem;
  transform: translateX(-50%) rotate(0deg);
}

.sun,
.moon {
  position: absolute;
  z-index: 2;
  border-radius: 50%;
}

.sun {
  top: 5.2rem;
  right: 12rem;
  width: 3rem;
  height: 3rem;
  background: #ffbf12;
}

.moon {
  bottom: 5.6rem;
  right: 13rem;
  width: 2.4rem;
  height: 2.4rem;
  background: #ffd033;
  box-shadow: inset 0.7rem 0 0 #0b3568;
}

.light-scales {
  display: grid;
  gap: 0.8rem;
  color: rgba(247, 241, 231, 0.72);
  font-size: 0.85rem;
}

.light-scales div {
  display: grid;
  grid-template-columns: 3rem 1fr 3rem;
  gap: 0.75rem;
  align-items: center;
}

.light-scales b {
  display: block;
  height: 1.15rem;
}

.temperature {
  background: linear-gradient(90deg, #f6a179, #f5eee2, #8fd9ed);
}

.brightness {
  background: linear-gradient(90deg, #161616, #777, #f2efe4);
}

.scope {
  clip-path: polygon(0 70%, 100% 0, 100% 100%, 0 100%);
  background: #ffbd00;
}

.comfort-map {
  position: relative;
  min-height: 34rem;
  overflow: hidden;
  border: 1px solid rgba(247, 241, 231, 0.22);
  background:
    linear-gradient(120deg, rgba(255, 167, 92, 0.55) 0 33%, rgba(255, 255, 255, 0.9) 33% 56%, rgba(122, 207, 237, 0.62) 56% 100%),
    rgba(247, 241, 231, 0.9);
  color: #323232;
}

.axis-y,
.axis-x {
  position: absolute;
  color: rgba(20, 20, 20, 0.62);
  font-size: 0.75rem;
}

.axis-y {
  top: 1rem;
  left: 0.8rem;
  writing-mode: vertical-rl;
}

.axis-x {
  right: 0.85rem;
  bottom: 0.75rem;
}

.comfort-band {
  position: absolute;
  z-index: 2;
  left: 39%;
  top: 45%;
  padding: 0.55rem 1rem;
  border-radius: 999px;
  background: #5172bd;
  color: white;
  font-size: 0.9rem;
  font-weight: 700;
}

.zone {
  position: absolute;
  display: grid;
  place-items: end center;
  width: 32%;
  height: 25%;
  padding: 1rem;
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.08), rgba(0, 0, 0, 0.18));
  box-shadow: 0 0.75rem 1.4rem rgba(0, 0, 0, 0.18);
  color: #3b3b3b;
  text-align: center;
}

.zone::before {
  content: "";
  position: absolute;
  inset: 0;
  opacity: 0.9;
}

.zone b {
  position: relative;
  z-index: 1;
  font-size: 0.9rem;
  font-weight: 500;
}

.sultry { left: 8%; top: 10%; }
.cool { right: 8%; top: 10%; }
.warm { left: 15%; bottom: 11%; }
.gloomy { right: 7%; bottom: 11%; }

.sultry::before { background: linear-gradient(135deg, #f47d34, #ffd69b); }
.cool::before { background: linear-gradient(135deg, #d8d8d8, #ffffff); }
.warm::before { background: linear-gradient(135deg, #5a2f16, #cb8f58); }
.gloomy::before { background: linear-gradient(135deg, #07121a, #476579); }

.level,
.temp {
  position: absolute;
  z-index: 2;
  color: rgba(20, 20, 20, 0.72);
  font-size: 0.75rem;
  text-align: center;
}

.level {
  left: -0.1rem;
  width: 2.3rem;
  height: 2.3rem;
  display: grid;
  place-items: center;
  border-radius: 50%;
  color: white;
  font-weight: 700;
}

.level.high {
  top: 20%;
  background: #46bfe5;
}

.level.low {
  bottom: 15%;
  background: #ff9a7d;
}

.warm-label {
  left: 25%;
  bottom: 0.7rem;
}

.cool-label {
  right: 18%;
  bottom: 0.7rem;
}

.cases {
  display: grid;
  grid-template-columns: minmax(0, 0.85fr) minmax(20rem, 1fr);
  gap: clamp(2rem, 7vw, 8rem);
  align-items: center;
}

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

.case-list a {
  display: flex;
  justify-content: space-between;
  padding: 1.25rem 0;
  border-bottom: 1px solid var(--line);
  color: rgba(247, 241, 231, 0.85);
  font-size: clamp(1.35rem, 3vw, 2.5rem);
  letter-spacing: 0.08em;
}

.case-list a::after {
  color: var(--gold);
  content: "⇀";
}

.business-cases,
.residential-cases,
.building-cases,
.temple-cases,
.customized-cases {
  border-top: 1px solid var(--line);
}

.business-cases .section-heading p:not(.eyebrow),
.residential-cases .section-heading p:not(.eyebrow),
.building-cases .section-heading p:not(.eyebrow),
.temple-cases .section-heading p:not(.eyebrow),
.customized-cases .section-heading p:not(.eyebrow) {
  color: var(--muted);
}

.business-case-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 2rem;
}

.business-case-tabs button {
  min-width: 5.5rem;
  padding: 0.6rem 1rem;
  border: 1px solid rgba(214, 173, 98, 0.42);
  background: transparent;
  color: rgba(247, 241, 231, 0.82);
  font: inherit;
  cursor: pointer;
  transition: background 0.2s ease, color 0.2s ease, border-color 0.2s ease;
}

.business-case-tabs button:hover,
.business-case-tabs button.is-active {
  border-color: var(--gold);
  background: var(--gold);
  color: var(--ink);
}

.business-case-grid,
.project-case-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: clamp(1rem, 2vw, 1.5rem);
  margin-top: 2.5rem;
}

.business-case-grid article,
.project-case-grid article {
  position: relative;
  overflow: hidden;
  min-height: 18rem;
  background: rgba(17, 16, 13, 0.84);
}

.business-case-grid article.is-hidden {
  display: none;
}

.business-case-grid img,
.project-case-grid img {
  display: block;
  width: 100%;
  height: 16vw;
  min-height: 15rem;
  object-fit: cover;
  transition: transform 0.4s ease, opacity 0.4s ease;
}

.business-case-grid article:hover img,
.project-case-grid article:hover img {
  opacity: 0.86;
  transform: scale(1.06);
}

.business-case-grid h3,
.project-case-grid h3 {
  margin: 0;
  padding: 1rem 1.1rem 1.2rem;
  color: rgba(247, 241, 231, 0.9);
  font-size: 1rem;
  line-height: 1.5;
}

.residential-cases {
  border-top: 1px solid var(--line);
}

.koizumi {
  display: grid;
  grid-template-columns: minmax(0, 0.85fr) minmax(20rem, 1fr);
  gap: clamp(2rem, 6vw, 7rem);
  align-items: center;
  margin: 0 clamp(1.25rem, 6vw, 7rem) clamp(4rem, 8vw, 8rem);
  padding: clamp(2rem, 5vw, 4.5rem);
  background: var(--panel);
  color: var(--ink);
}

.koizumi p {
  color: rgba(33, 29, 23, 0.7);
}

.product-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
}

.product-grid img {
  width: 100%;
  min-height: 12rem;
  height: 12rem;
  object-fit: cover;
}

.product-grid img:nth-child(2),
.product-grid img:nth-child(3) {
  transform: translateY(2rem);
}

.site-footer {
  display: flex;
  justify-content: space-between;
  gap: 2rem;
  padding: 3rem clamp(1.25rem, 6vw, 7rem);
  border-top: 1px solid var(--line);
  color: var(--muted);
}

.site-footer nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 0.85rem 1.5rem;
  max-width: 34rem;
}

.footer-brand {
  margin-bottom: 1rem;
  color: var(--text);
}

.back-top {
  position: fixed;
  right: 1.25rem;
  bottom: 1.25rem;
  display: grid;
  width: 3rem;
  height: 3rem;
  place-items: center;
  border: 1px solid rgba(214, 173, 98, 0.7);
  background: rgba(17, 16, 13, 0.78);
  color: var(--gold);
  cursor: pointer;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.2s ease, transform 0.2s ease;
}

.back-top.is-visible {
  opacity: 1;
  pointer-events: auto;
}

.back-top:hover {
  transform: translateY(-2px);
}

.contact-section {
  border-top: 1px solid var(--line);
  background:
    radial-gradient(circle at 84% 12%, rgba(214, 173, 98, 0.11), transparent 28rem),
    rgba(255, 255, 255, 0.02);
}

.contact-layout {
  display: grid;
  grid-template-columns: minmax(18rem, 0.85fr) minmax(24rem, 1.15fr);
  gap: clamp(2rem, 6vw, 7rem);
  margin-top: 2.25rem;
}

.contact-info {
  display: grid;
  align-content: start;
  gap: 2rem;
  color: var(--ink);
}

.branch-tabs {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  border-bottom: 1px solid rgba(247, 241, 231, 0.34);
}

.branch-tabs button {
  padding: 0 0 0.85rem;
  border: 0;
  background: transparent;
  color: var(--muted);
  font: inherit;
  font-size: 1.05rem;
  cursor: pointer;
  transition: color 0.2s ease;
}

.branch-tabs button.is-active {
  color: var(--text);
}

.branch-panel {
  display: none;
}

.branch-panel.is-active {
  display: block;
}

.branch-panel h3 {
  margin-bottom: 1rem;
  color: var(--text);
  font-size: 1.05rem;
  font-weight: 700;
}

.branch-panel p {
  margin-bottom: 0.55rem;
  color: rgba(247, 241, 231, 0.8);
}

.branch-panel iframe {
  display: block;
  width: 100%;
  height: 22.5rem;
  margin-top: 2rem;
  border: 0;
  filter: saturate(0.82) contrast(0.94);
}

.contact-form {
  display: grid;
  gap: 1.15rem;
  padding: clamp(1.5rem, 3vw, 2.35rem);
  background: rgba(17, 16, 13, 0.84);
  border: 1px solid var(--line);
}

.contact-form h3 {
  margin-bottom: 0.25rem;
}

.form-row {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
}

.contact-form label {
  display: grid;
  gap: 0.45rem;
  color: rgba(247, 241, 231, 0.82);
}

.contact-form input,
.contact-form textarea {
  width: 100%;
  border: 1px solid rgba(255, 255, 255, 0.1);
  background: rgba(255, 255, 255, 0.94);
  color: var(--ink);
  font: inherit;
}

.contact-form input {
  min-height: 3rem;
  padding: 0.75rem 0.9rem;
}

.contact-form textarea {
  min-height: 10rem;
  resize: vertical;
  padding: 0.85rem 0.9rem;
}

.contact-form .button {
  width: fit-content;
  cursor: pointer;
}

.form-note {
  margin: 0;
  color: var(--muted);
  font-size: 0.9rem;
}

.form-note.is-success {
  color: var(--gold);
}

.form-note.is-error {
  color: #ffb4a8;
}

.contact-form button:disabled {
  cursor: wait;
  opacity: 0.65;
}

.product-page {
  background:
    radial-gradient(circle at 74% 10%, rgba(214, 173, 98, 0.18), transparent 30rem),
    linear-gradient(180deg, #0d0c0a 0%, var(--bg) 52%, #17130f 100%);
}

.product-hero {
  display: grid;
  min-height: 84vh;
  grid-template-columns: minmax(0, 0.9fr) minmax(22rem, 1fr);
  gap: clamp(2rem, 6vw, 7rem);
  align-items: center;
  padding: 10rem clamp(1.25rem, 6vw, 7rem) 5rem;
}

.product-hero h1 {
  max-width: 9em;
}

.product-hero p {
  max-width: 42rem;
  color: var(--muted);
}

.product-hero-panel {
  position: relative;
}

.product-hero-panel::before {
  position: absolute;
  inset: 12% -8% -8% 12%;
  z-index: -1;
  border: 1px solid rgba(214, 173, 98, 0.36);
  content: "";
}

.product-hero-panel img {
  width: 100%;
  height: min(62vh, 42rem);
  object-fit: cover;
  box-shadow: var(--shadow);
}

.principle-grid,
.plan-grid,
.collection-grid {
  display: grid;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.principle-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
  margin-top: 2rem;
}

.principle-grid article,
.plan-grid article {
  padding: clamp(1.5rem, 3vw, 2.4rem);
  background: rgba(17, 16, 13, 0.84);
}

.principle-grid span {
  display: block;
  margin-bottom: 2rem;
  color: var(--gold);
  font-family: "Noto Serif TC", serif;
  font-size: 2rem;
}

.principle-grid p {
  color: var(--muted);
}

.plan-grid {
  grid-template-columns: repeat(6, minmax(0, 1fr));
  margin-top: 2.5rem;
}

.plan-grid article {
  min-height: 12rem;
}

.plan-grid strong {
  display: block;
  color: var(--gold);
  font-family: "Noto Serif TC", serif;
  font-size: 1.35rem;
  font-weight: 500;
}

.plan-grid span {
  display: block;
  margin-top: 1rem;
  color: var(--muted);
  letter-spacing: 0.08em;
}

.collection-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
  margin-top: 2rem;
}

.collection-grid article {
  display: grid;
  grid-template-columns: minmax(9rem, 0.45fr) minmax(0, 1fr);
  min-height: 18rem;
  background: rgba(17, 16, 13, 0.84);
}

.collection-grid img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.collection-grid div {
  padding: clamp(1.25rem, 3vw, 2.25rem);
}

.collection-grid span {
  display: block;
  margin-bottom: 1rem;
  color: var(--gold);
  font-family: "Noto Serif TC", serif;
  letter-spacing: 0.18em;
}

.collection-grid p,
.specs .section-heading p {
  color: var(--muted);
}

.product-search-hero {
  min-height: 72vh;
}

.product-search-panel {
  display: grid;
  min-height: 28rem;
  place-content: center;
  padding: clamp(2rem, 5vw, 4rem);
  background:
    radial-gradient(circle at 70% 25%, rgba(214, 173, 98, 0.22), transparent 18rem),
    linear-gradient(135deg, rgba(247, 241, 231, 0.08), rgba(17, 16, 13, 0.9));
  border: 1px solid rgba(214, 173, 98, 0.26);
}

.product-search-panel span {
  color: var(--gold);
  font-family: "Noto Serif TC", serif;
  font-size: clamp(1.6rem, 3vw, 2.7rem);
  letter-spacing: 0.24em;
  text-transform: uppercase;
}

.product-search-panel strong {
  color: var(--text);
  font-family: "Noto Serif TC", serif;
  font-size: clamp(4rem, 9vw, 9rem);
  font-weight: 400;
  line-height: 0.9;
}

.product-search-panel p {
  max-width: 32rem;
  color: var(--muted);
}

.product-advance .section-heading p:not(.eyebrow),
.small-heading p:not(.eyebrow) {
  color: var(--muted);
}

.filter-layout {
  display: grid;
  grid-template-columns: minmax(18rem, 0.42fr) minmax(0, 1fr);
  gap: clamp(1.5rem, 4vw, 3rem);
  margin-top: clamp(2rem, 5vw, 4rem);
}

.filter-panel,
.fixture-results {
  min-width: 0;
}

.filter-panel {
  display: grid;
  gap: 1.4rem;
  align-content: start;
  padding: clamp(1.2rem, 2.5vw, 1.8rem);
  border: 1px solid var(--line);
  background: rgba(17, 16, 13, 0.84);
}

.filter-group {
  display: grid;
  gap: 0.8rem;
}

.filter-group h3,
.result-header h2 {
  margin: 0;
  color: rgba(247, 241, 231, 0.9);
  font-size: 1rem;
  letter-spacing: 0.08em;
}

.filter-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem;
}

.filter-chips button,
.result-header button {
  padding: 0.55rem 0.75rem;
  border: 1px solid rgba(214, 173, 98, 0.28);
  background: transparent;
  color: var(--muted);
  font: inherit;
  cursor: pointer;
  transition: background 0.2s ease, color 0.2s ease, border-color 0.2s ease;
}

.filter-chips.compact button {
  padding: 0.45rem 0.65rem;
  font-size: 0.9rem;
}

.filter-chips button:hover,
.result-header button:hover {
  border-color: var(--gold);
  background: var(--gold);
  color: var(--ink);
}

.filter-row {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
}

.filter-row.triple {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.range-fields {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  gap: 0.55rem;
  align-items: center;
  color: var(--muted);
}

.range-fields input {
  width: 100%;
  min-width: 0;
  padding: 0.65rem 0.75rem;
  border: 1px solid rgba(247, 241, 231, 0.14);
  background: rgba(255, 255, 255, 0.04);
  color: var(--text);
}

.fixture-results {
  display: grid;
  gap: clamp(2rem, 4vw, 3rem);
}

.small-heading {
  max-width: none;
}

.fixture-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1px;
  margin-top: 1.5rem;
  background: var(--line);
  border: 1px solid var(--line);
}

.fixture-grid article {
  display: grid;
  min-height: 10rem;
  gap: 1rem;
  align-content: center;
  justify-items: center;
  padding: 1.2rem;
  background: rgba(17, 16, 13, 0.84);
  text-align: center;
}

.fixture-grid span {
  width: 3.6rem;
  height: 3.6rem;
  border: 1px solid rgba(214, 173, 98, 0.45);
  border-radius: 999px;
  background:
    linear-gradient(90deg, transparent 46%, rgba(214, 173, 98, 0.6) 46% 54%, transparent 54%),
    radial-gradient(circle, rgba(214, 173, 98, 0.26), transparent 62%);
}

.fixture-grid h3 {
  margin: 0;
  color: rgba(247, 241, 231, 0.86);
  font-size: 1rem;
  font-weight: 400;
}

.product-results {
  display: grid;
  gap: 1rem;
}

.result-header {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  align-items: center;
}

.spec-table-wrap {
  margin-top: 2rem;
  overflow-x: auto;
  border: 1px solid var(--line);
}

.spec-table {
  width: 100%;
  min-width: 58rem;
  border-collapse: collapse;
  background: rgba(17, 16, 13, 0.84);
}

.spec-table th,
.spec-table td {
  padding: 1rem;
  border-bottom: 1px solid var(--line);
  text-align: left;
  vertical-align: top;
}

.spec-table th {
  color: var(--gold);
  font-weight: 500;
  letter-spacing: 0.08em;
}

.spec-table td {
  color: rgba(247, 241, 231, 0.82);
}

.full-catalog {
  border-top: 1px solid var(--line);
}

.catalog-tools {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  align-items: end;
  justify-content: space-between;
  margin-top: 2rem;
}

.catalog-search {
  display: grid;
  flex: 1 1 24rem;
  gap: 0.6rem;
  color: var(--muted);
}

.catalog-search input {
  width: 100%;
  padding: 0.9rem 1rem;
  border: 1px solid rgba(214, 173, 98, 0.38);
  background: rgba(17, 16, 13, 0.86);
  color: var(--text);
  font: inherit;
}

.catalog-jump {
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem;
  margin-top: 1.4rem;
}

.catalog-jump a {
  padding: 0.45rem 0.75rem;
  border: 1px solid var(--line);
  color: var(--gold);
  font-size: 0.9rem;
}

.catalog-count {
  margin: 2rem 0 1rem;
  color: var(--muted);
}

.pdf-viewer {
  margin-top: 1.5rem;
  border: 1px solid var(--line);
  background: rgba(17, 16, 13, 0.84);
}

.pdf-viewer summary {
  padding: 1rem 1.25rem;
  color: var(--gold);
  cursor: pointer;
}

.pdf-viewer iframe {
  display: block;
  width: 100%;
  height: min(78vh, 52rem);
  border: 0;
  border-top: 1px solid var(--line);
  background: #11100d;
}

.catalog-pages {
  display: grid;
  gap: 1rem;
}

.catalog-page {
  display: grid;
  grid-template-columns: minmax(8rem, 0.28fr) minmax(0, 1fr);
  border: 1px solid var(--line);
  background: rgba(17, 16, 13, 0.84);
}

.catalog-page header {
  padding: 1.25rem;
  border-right: 1px solid var(--line);
}

.catalog-page header span {
  display: block;
  margin-bottom: 1rem;
  color: var(--gold);
  font-family: "Noto Serif TC", serif;
  font-size: 1.4rem;
}

.catalog-page header h3 {
  margin: 0;
  font-size: 1rem;
}

.catalog-page-body {
  max-height: 34rem;
  overflow: auto;
  padding: 1.25rem;
}

.catalog-image-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(9rem, 1fr));
  gap: 0.75rem;
  margin-bottom: 1.25rem;
}

.catalog-image-grid figure {
  display: grid;
  min-height: 9rem;
  place-items: center;
  margin: 0;
  overflow: hidden;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.1);
}

.catalog-image-grid img {
  display: block;
  max-width: 100%;
  width: 100%;
  height: auto;
  object-fit: contain;
}

.catalog-page-body p {
  margin-bottom: 0.55rem;
  color: rgba(247, 241, 231, 0.78);
  font-size: 0.95rem;
  line-height: 1.7;
}

@media (max-width: 980px) {
  .nav-toggle {
    display: inline-flex;
    align-items: center;
    gap: 0.55rem;
    border: 0;
    background: transparent;
    color: var(--text);
    font: inherit;
    letter-spacing: 0.12em;
    cursor: pointer;
  }

  .nav-toggle-icon {
    width: 1.7rem;
    height: 1.7rem;
    color: var(--gold);
  }

  .nav-toggle-icon path {
    fill: none;
    stroke: currentColor;
    stroke-linecap: round;
    stroke-width: 1.8;
  }

  .nav-toggle-text {
    display: inline-block;
  }

  .site-nav {
    position: absolute;
    top: 100%;
    left: 1rem;
    right: 1rem;
    display: none;
    padding: 1rem;
    background: rgba(17, 16, 13, 0.96);
    border: 1px solid var(--line);
  }

  .site-nav.is-open {
    display: grid;
  }

  .nav-group {
    display: grid;
    gap: 0.35rem;
  }

  .nav-submenu {
    position: static;
    display: grid;
    min-width: 0;
    padding: 0.25rem 0 0.25rem 1rem;
    background: transparent;
    border: 0;
    box-shadow: none;
    opacity: 1;
    pointer-events: auto;
    transform: none;
  }

  .nav-submenu a {
    padding: 0.2rem 0;
    color: var(--muted);
  }

  .hero,
  .product-hero,
  .services-intro,
  .philosophy,
  .philosophy-grid,
  .history,
  .about,
  .cases,
  .koizumi,
  .contact-layout {
    grid-template-columns: 1fr;
  }

  .hero {
    min-height: 100svh;
    padding-top: 8rem;
    justify-content: flex-start;
  }

  .hero-copy {
    width: min(100%, 42rem);
    margin-left: 0;
  }

  .hero::after {
    background:
      linear-gradient(180deg, rgba(7, 7, 6, 0.74) 0%, rgba(7, 7, 6, 0.26) 38%, rgba(7, 7, 6, 0.84) 100%);
  }

  .gallery-strip {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .gallery-card.tall {
    transform: none;
  }

  .carousel-slide {
    flex-basis: clamp(12rem, 32vw, 18rem);
  }

  .service-grid {
    grid-template-columns: 1fr;
  }

  .philosophy-principles {
    grid-template-columns: 1fr;
  }

  .sky {
    min-height: 20rem;
  }

  .comfort-map {
    min-height: 28rem;
  }

  .business-case-grid,
  .project-case-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .timeline::before {
    left: 1rem;
  }

  .timeline article,
  .timeline article:nth-child(odd),
  .timeline article:nth-child(even) {
    width: 100%;
    margin-left: 0;
    padding-right: 0;
    padding-left: 3.5rem;
  }

  .timeline article:nth-child(odd)::before,
  .timeline article:nth-child(even)::before {
    left: 1rem;
    right: auto;
    transform: translateX(-50%);
  }

  .principle-grid,
  .collection-grid {
    grid-template-columns: 1fr;
  }

  .filter-layout {
    grid-template-columns: 1fr;
  }

  .fixture-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .plan-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .catalog-page {
    grid-template-columns: 1fr;
  }

  .catalog-page header {
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }
}

@media (max-width: 640px) {
  .brand-text {
    display: none;
  }

  .brand {
    width: 9.8rem;
  }

  .hero {
    min-height: auto;
  }

  .hero-actions,
  .site-footer {
    display: grid;
  }

  .gallery-strip,
  .product-grid,
  .plan-grid {
    grid-template-columns: 1fr;
  }

  .collection-grid article {
    grid-template-columns: 1fr;
  }

  .filter-row,
  .filter-row.triple,
  .fixture-grid {
    grid-template-columns: 1fr;
  }

  .result-header {
    display: grid;
  }

  .business-case-grid,
  .project-case-grid {
    grid-template-columns: 1fr;
  }

  .business-case-grid img,
  .project-case-grid img {
    height: 56vw;
  }

  .carousel-slide {
    flex-basis: 78vw;
    min-height: 18rem;
  }

  .principle-card {
    padding: 1rem;
  }

  .sky {
    min-height: 17rem;
  }

  .bubble {
    width: 6.2rem;
    height: 6.2rem;
    font-size: 0.85rem;
  }

  .clock {
    width: 7rem;
    height: 7rem;
  }

  .sun,
  .moon {
    right: 24%;
  }

  .comfort-map {
    min-height: 25rem;
  }

  .zone {
    width: 36%;
    height: 22%;
    padding: 0.6rem;
  }

  .zone b {
    font-size: 0.75rem;
  }

  .form-row {
    grid-template-columns: 1fr;
  }

  .collection-grid img {
    min-height: 14rem;
  }

  .gallery-card,
  .service-grid article {
    min-height: 17rem;
  }

  .site-footer nav {
    justify-content: start;
  }
}