:root {
  --paper: #f4f2ed;
  --paper-deep: #e9e5dc;
  --ink: #1f2b26;
  --muted: #6c7771;
  --line: #d7d3ca;
  --forest: #20342c;
  --forest-soft: #50675d;
  --warm: #c7925c;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: "PingFang SC", "Noto Sans CJK SC", "Microsoft YaHei", Arial, sans-serif;
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; }
button { font: inherit; }
.shell { width: min(1200px, calc(100% - 80px)); margin-inline: auto; }

.section-kicker,
.eyebrow {
  margin: 0;
  font-size: 10px;
  line-height: 1.4;
  letter-spacing: .28em;
  text-transform: uppercase;
}
.section-kicker { color: #87908b; }

/* Hero */
.hero {
  position: relative;
  min-height: 720px;
  height: 92svh;
  max-height: 900px;
  overflow: hidden;
  isolation: isolate;
  color: #fff;
  background: #68736c;
}
.hero-image,
.hero-light {
  position: absolute;
  inset: 0;
  transition: filter .8s ease, opacity .8s ease, background .8s ease;
}
.hero-image {
  z-index: -3;
  background: url("/images/hero-living-room.jpg") center 52% / cover no-repeat;
}
.hero-light { z-index: -2; pointer-events: none; }
.hero::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  background:
    linear-gradient(90deg, rgba(18, 27, 23, .7) 0%, rgba(18, 27, 23, .38) 48%, rgba(18, 27, 23, .08) 78%),
    linear-gradient(0deg, rgba(12, 20, 16, .38), transparent 42%);
}
.scene-day .hero-image { filter: brightness(1.05) saturate(.85); }
.scene-day .hero-light { opacity: .2; background: linear-gradient(130deg, rgba(255,252,231,.5), transparent 56%); }
.scene-warm .hero-image { filter: brightness(.8) saturate(.86) sepia(.06); }
.scene-warm .hero-light { opacity: .8; background: radial-gradient(circle at 52% 72%, rgba(255,181,95,.35), transparent 36%); }
.scene-cinema .hero-image { filter: brightness(.46) saturate(.62); }
.scene-cinema .hero-light { opacity: .9; background: linear-gradient(120deg, rgba(22,37,31,.2), rgba(7,12,10,.52)); }

.site-header {
  height: 74px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid rgba(255,255,255,.22);
}
.brand { display: inline-flex; align-items: center; gap: 11px; }
.brand-mark {
  width: 34px;
  height: 34px;
  display: grid;
  place-items: center;
  border: 1px solid rgba(255,255,255,.62);
  border-radius: 50%;
  font-family: Georgia, serif;
  font-size: 16px;
}
.brand strong { display: block; font-size: 14px; line-height: 1.2; font-weight: 500; letter-spacing: .12em; }
.brand small { display: block; margin-top: 4px; font-size: 7px; line-height: 1; letter-spacing: .22em; opacity: .7; }
nav { display: flex; align-items: center; gap: 34px; font-size: 12px; letter-spacing: .08em; }
nav a { opacity: .78; transition: opacity .2s; }
nav a:hover { opacity: 1; }
.header-cta { padding: 8px 17px; border: 1px solid rgba(255,255,255,.55); border-radius: 999px; font-size: 11px; letter-spacing: .06em; }

.hero-content {
  height: calc(100% - 142px);
  display: grid;
  grid-template-columns: minmax(0, 1fr) 252px;
  align-items: center;
  gap: 90px;
  padding-block: 36px;
}
.hero-copy { max-width: 690px; }
.eyebrow { margin-bottom: 20px; color: rgba(255,255,255,.7); }
.hero h1 {
  margin: 0;
  max-width: 680px;
  font-size: clamp(52px, 5.3vw, 72px);
  line-height: 1.16;
  font-weight: 400;
  letter-spacing: -.03em;
}
.hero h1 span { display: block; }
.hero-lead {
  max-width: 510px;
  margin: 26px 0 0;
  color: rgba(255,255,255,.78);
  font-size: 15px;
  line-height: 1.9;
  letter-spacing: .02em;
}
.hero-actions { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 30px; }
.button {
  min-height: 46px;
  padding: 0 20px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 20px;
  border-radius: 999px;
  font-size: 12px;
  transition: transform .2s, background .2s;
}
.button:hover { transform: translateY(-2px); }
.button-primary { color: #2b3b34; background: #f3efe7; }
.button-ghost { border: 1px solid rgba(255,255,255,.38); background: rgba(255,255,255,.05); backdrop-filter: blur(10px); }

.scene-panel {
  width: 252px;
  padding: 18px;
  border: 1px solid rgba(255,255,255,.25);
  border-radius: 18px;
  background: rgba(29,43,37,.38);
  backdrop-filter: blur(16px);
  box-shadow: 0 18px 60px rgba(9,16,13,.16);
}
.scene-panel-head,
.scene-status { display: flex; align-items: center; justify-content: space-between; }
.scene-panel-head { font-size: 11px; letter-spacing: .08em; }
.live-dot { font-size: 9px; color: #d5e9d7; }
.live-dot::before { content: ""; display: inline-block; width: 4px; height: 4px; margin-right: 6px; border-radius: 50%; background: #bfe2bd; box-shadow: 0 0 0 4px rgba(191,226,189,.12); }
.scene-buttons { display: grid; grid-template-columns: repeat(3, 1fr); gap: 6px; margin: 16px 0; }
.scene-buttons button {
  padding: 9px 3px 8px;
  border: 1px solid rgba(255,255,255,.12);
  border-radius: 10px;
  color: rgba(255,255,255,.66);
  background: rgba(255,255,255,.045);
  cursor: pointer;
  transition: .2s ease;
}
.scene-buttons button:hover,
.scene-buttons button.active { color: #304038; background: #f0eadf; }
.scene-icon { display: block; height: 17px; font-size: 12px; }
.scene-buttons button span:last-child { font-size: 9px; }
.scene-status { padding-top: 14px; border-top: 1px solid rgba(255,255,255,.14); font-size: 10px; }
.switch { width: 32px; height: 18px; padding: 2px; border-radius: 999px; background: rgba(255,255,255,.2); transition: .3s; }
.switch i { display: block; width: 14px; height: 14px; border-radius: 50%; background: #fff; transition: transform .3s; }
.switch.on { background: var(--warm); }
.switch.on i { transform: translateX(14px); }
.scene-panel p { margin: 12px 0 0; color: rgba(255,255,255,.5); font-size: 9px; line-height: 1.6; }
.hero-bottom {
  height: 68px;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  align-items: center;
  border-top: 1px solid rgba(255,255,255,.2);
  color: rgba(255,255,255,.66);
  font-size: 9px;
  letter-spacing: .1em;
}
.hero-bottom span { padding-left: 26px; border-left: 1px solid rgba(255,255,255,.18); }
.hero-bottom span:first-child { padding-left: 0; border-left: 0; }

/* Intro */
.intro { padding-block: 104px 112px; }
.intro-grid,
.section-heading {
  display: grid;
  grid-template-columns: minmax(0, 1.08fr) minmax(300px, .72fr);
  gap: 110px;
  align-items: end;
}
.intro-grid { margin-top: 20px; }
.intro h2,
.section-heading h2 {
  margin: 0;
  max-width: 650px;
  font-size: clamp(36px, 4vw, 48px);
  line-height: 1.32;
  font-weight: 400;
  letter-spacing: -.025em;
}
.section-heading h2 { margin-top: 14px; }
.intro-grid > p,
.section-heading > p {
  margin: 0 0 3px;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.9;
}
.intro-visual {
  position: relative;
  aspect-ratio: 2.35 / 1;
  margin-top: 58px;
  overflow: hidden;
  isolation: isolate;
  background: #6d665a;
}
.intro-visual::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -2;
  background: url("/images/temperature-living-room.png") center 52% / cover no-repeat;
  transition: filter .75s ease;
}
.intro-visual::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  background: linear-gradient(90deg, rgba(15,24,20,.64), rgba(15,24,20,.08) 54%, rgba(15,24,20,.14));
}
.intro-light-overlay {
  position: absolute;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  opacity: 0;
  transition: opacity .75s ease, background .75s ease;
  mix-blend-mode: color;
}
.temp-warm::before { filter: brightness(.93) saturate(1.08) sepia(.12); }
.temp-warm .intro-light-overlay { opacity: 1; background: rgba(255,157,70,.22); }
.temp-neutral::before { filter: brightness(.96) saturate(.94); }
.temp-cool::before { filter: brightness(1.03) saturate(.84); }
.temp-cool .intro-light-overlay { opacity: 1; background: rgba(123,183,237,.2); }
.intro-visual-copy { position: absolute; left: 42px; bottom: 38px; z-index: 2; color: #fff; }
.intro-visual-copy span { display: block; margin-bottom: 10px; font-size: 9px; letter-spacing: .22em; opacity: .72; }
.intro-visual-copy strong { display: block; font-size: 23px; line-height: 1.3; font-weight: 400; letter-spacing: .04em; }
.temperature-control {
  position: absolute;
  right: 30px;
  bottom: 28px;
  z-index: 2;
  width: 318px;
  padding: 14px;
  border: 1px solid rgba(255,255,255,.28);
  background: rgba(25,34,30,.4);
  color: #fff;
  backdrop-filter: blur(14px);
}
.temperature-head { display: flex; align-items: center; justify-content: space-between; margin-bottom: 11px; }
.temperature-head span { font-size: 7px; letter-spacing: .18em; opacity: .62; }
.temperature-head b { font-size: 9px; font-weight: 400; opacity: .82; }
.temperature-buttons { display: grid; grid-template-columns: repeat(3, 1fr); gap: 5px; }
.temperature-buttons button {
  min-height: 53px;
  padding: 7px 4px;
  border: 1px solid rgba(255,255,255,.15);
  color: rgba(255,255,255,.7);
  background: rgba(255,255,255,.05);
  cursor: pointer;
  transition: .22s ease;
}
.temperature-buttons button:hover,
.temperature-buttons button.active { color: #314039; background: #f3eee4; }
.temperature-buttons strong { display: block; font-size: 11px; font-weight: 500; letter-spacing: .03em; }
.temperature-buttons span { display: block; margin-top: 2px; font-size: 8px; }
.feature-grid { display: grid; grid-template-columns: repeat(4, 1fr); margin-top: 62px; border-top: 1px solid var(--line); }
.feature-card { min-height: 182px; padding: 22px 28px 18px 0; border-bottom: 1px solid var(--line); }
.feature-card + .feature-card { padding-left: 28px; border-left: 1px solid var(--line); }
.feature-card > span { font-size: 9px; letter-spacing: .16em; color: #9aa29e; }
.feature-card h3 { margin: 35px 0 10px; font-size: 16px; line-height: 1.3; font-weight: 500; letter-spacing: .04em; }
.feature-card p { margin: 0; color: var(--muted); font-size: 12px; line-height: 1.8; }

/* Whole-home system */
.ecosystem { padding-block: 106px 112px; color: #edf0eb; background: var(--forest); }
.light-heading .section-kicker { color: #9eb0a6; }
.light-heading > p { color: #aebbb3; }
.product-matrix { display: grid; grid-template-columns: repeat(5, 1fr); margin-top: 62px; border-top: 1px solid rgba(255,255,255,.16); border-bottom: 1px solid rgba(255,255,255,.16); }
.product-matrix article { min-height: 174px; padding: 24px 22px; }
.product-matrix article + article { border-left: 1px solid rgba(255,255,255,.16); }
.product-icon { display: block; height: 34px; color: #d7c59e; font-family: Georgia, serif; font-size: 22px; }
.product-matrix h3 { margin: 28px 0 8px; font-size: 14px; font-weight: 500; letter-spacing: .06em; }
.product-matrix p { margin: 0; color: #aab7af; font-size: 10px; line-height: 1.7; }
.scene-showcase { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; margin-top: 42px; }
.scene-showcase article {
  position: relative;
  min-height: 340px;
  padding: 26px;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  isolation: isolate;
  background-position: center;
  background-size: cover;
}
.scene-showcase article::after { content: ""; position: absolute; inset: 0; z-index: -1; background: linear-gradient(0deg, rgba(13,21,18,.82), rgba(13,21,18,.03) 66%); }
.scene-showcase article:nth-child(1) { background-image: url("/images/scene-comfort.png"); }
.scene-showcase article:nth-child(2) { background-image: url("/images/scene-cinema.png"); }
.scene-showcase article:nth-child(3) { background-image: url("/images/scene-security.png"); }
.scene-showcase span { font-size: 8px; letter-spacing: .2em; color: rgba(255,255,255,.62); }
.scene-showcase h3 { margin: 9px 0 8px; font-size: 23px; line-height: 1.3; font-weight: 400; }
.scene-showcase p { max-width: 290px; margin: 0; color: rgba(255,255,255,.68); font-size: 11px; line-height: 1.75; }

/* Cases */
.cases { padding-block: 108px 118px; }
.case-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 54px 20px; margin-top: 62px; }
.case-card { min-width: 0; }
.case-1 { grid-column: 1 / -1; }
.video-frame { position: relative; overflow: hidden; aspect-ratio: 16 / 9; background: #17201c; }
.video-frame::after { content: "CASE FILM"; position: absolute; left: 14px; top: 13px; padding: 5px 8px; color: #fff; background: rgba(21,31,27,.48); backdrop-filter: blur(7px); font-size: 7px; letter-spacing: .18em; pointer-events: none; }
.video-frame video { width: 100%; height: 100%; display: block; object-fit: cover; background: #17201c; }
.portrait .video-frame video { object-fit: contain; }
.case-meta { display: grid; grid-template-columns: 30px 1fr; gap: 12px; padding-top: 15px; }
.case-meta > span { padding-top: 3px; color: #9aa29e; font-size: 9px; }
.case-meta h3 { margin: 0 0 5px; font-size: 17px; line-height: 1.4; font-weight: 500; }
.case-meta p { margin: 0; color: var(--muted); font-size: 11px; }

/* Value and delivery */
.value-section { padding-block: 84px; background: var(--paper-deep); }
.value-grid { display: grid; grid-template-columns: 1.35fr .8fr .8fr; gap: 0; border-top: 1px solid #cbc6bb; border-bottom: 1px solid #cbc6bb; }
.value-lead,
.value-card { min-height: 250px; padding: 30px 32px; }
.value-lead { padding-left: 0; padding-right: 62px; }
.value-card { border-left: 1px solid #cbc6bb; }
.value-lead h2 { margin: 14px 0 13px; font-size: 34px; line-height: 1.35; font-weight: 400; }
.value-lead > p:last-child { max-width: 510px; margin: 0; color: var(--muted); font-size: 13px; line-height: 1.9; }
.value-card strong { display: block; color: var(--forest-soft); font-family: Georgia, serif; font-size: 48px; line-height: 1.1; font-weight: 400; }
.value-card span { display: block; margin-top: 7px; font-size: 13px; letter-spacing: .05em; }
.value-card p { margin: 50px 0 0; color: var(--muted); font-size: 11px; line-height: 1.8; }
.delivery { padding-block: 108px; }
.delivery-paths { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; margin-top: 54px; }
.delivery-paths article { padding: 28px; border: 1px solid var(--line); background: rgba(255,255,255,.22); }
.path-label { margin-bottom: 28px; font-size: 17px; font-weight: 500; }
.delivery-paths ol { display: grid; grid-template-columns: repeat(5, 1fr); gap: 0; padding: 0; margin: 0; border-top: 1px solid var(--line); list-style: none; }
.delivery-paths li { position: relative; min-height: 88px; padding: 14px 10px 10px 0; color: #56635c; font-size: 10px; line-height: 1.5; }
.delivery-paths li + li { padding-left: 10px; border-left: 1px solid var(--line); }
.delivery-paths li span { display: block; margin-bottom: 12px; color: #9ba39f; font-size: 8px; }

/* Contact */
.contact { padding-block: 86px; color: #f2f2ed; background: var(--forest-soft); }
.contact .section-kicker { color: #c1cec5; }
.contact-inner { display: grid; grid-template-columns: 1.15fr .65fr; align-items: end; gap: 90px; }
.contact h2 { margin: 14px 0 12px; font-size: clamp(38px, 4vw, 50px); line-height: 1.3; font-weight: 400; letter-spacing: -.025em; }
.contact p { margin: 0; color: #d1dcd4; font-size: 13px; }
.contact-action { display: flex; flex-direction: column; align-items: flex-start; gap: 10px; }
.contact-action button { min-height: 48px; padding: 0 21px; border: 0; border-radius: 999px; color: #3f544b; background: #f3efe6; cursor: pointer; font-size: 12px; transition: transform .2s; }
.contact-action button:hover { transform: translateY(-2px); }
.contact-email { padding-bottom: 3px; border-bottom: 1px solid rgba(255,255,255,.4); color: #fff; font-size: 13px; letter-spacing: .03em; }
.contact-email span { margin-left: 8px; color: #d8c4a7; }
.contact-action small { color: #c0cec4; font-size: 9px; }
footer { padding-block: 36px; color: #c7d1ca; background: #1d2924; }
.footer-inner { display: flex; align-items: center; justify-content: space-between; gap: 28px; }
.footer-inner p,
.footer-inner > a:last-child { font-size: 9px; letter-spacing: .08em; }
.footer-brand .brand-mark { width: 30px; height: 30px; }

@media (max-width: 900px) {
  .shell { width: min(100% - 36px, 720px); }
  nav { display: none; }
  .hero { height: auto; min-height: 780px; max-height: none; }
  .hero-content { height: 638px; grid-template-columns: 1fr; align-items: end; padding: 178px 0 42px; }
  .hero h1 { font-size: clamp(44px, 10vw, 60px); }
  .scene-panel { position: absolute; right: 18px; top: 94px; }
  .hero-bottom { height: auto; min-height: 68px; gap: 12px; }
  .intro-grid,
  .section-heading,
  .contact-inner { grid-template-columns: 1fr; gap: 22px; }
  .intro-visual { aspect-ratio: 1.55 / 1; }
  .temperature-control { width: 290px; }
  .feature-grid { grid-template-columns: 1fr 1fr; }
  .feature-card:nth-child(3) { border-left: 0; }
  .product-matrix { grid-template-columns: repeat(2, 1fr); }
  .product-matrix article + article { border-left: 0; }
  .product-matrix article:nth-child(even) { border-left: 1px solid rgba(255,255,255,.16); }
  .product-matrix article { border-bottom: 1px solid rgba(255,255,255,.16); }
  .product-matrix article:last-child { grid-column: 1 / -1; }
  .scene-showcase { grid-template-columns: 1fr; }
  .scene-showcase article { min-height: 300px; }
  .value-grid { grid-template-columns: 1fr 1fr; }
  .value-lead { grid-column: 1 / -1; min-height: auto; padding-right: 0; border-bottom: 1px solid #cbc6bb; }
  .value-card:first-of-type { border-left: 0; }
  .delivery-paths { grid-template-columns: 1fr; }
}

@media (max-width: 580px) {
  .shell { width: calc(100% - 30px); }
  .site-header { height: 66px; }
  .brand small { display: none; }
  .header-cta { padding: 7px 13px; }
  .hero { min-height: 760px; }
  .hero-content { height: 636px; padding-top: 188px; }
  .hero h1 { max-width: 360px; font-size: 42px; line-height: 1.2; }
  .hero-lead { max-width: 94%; font-size: 13px; }
  .scene-panel { width: calc(100% - 30px); right: 15px; top: 84px; padding: 14px; }
  .scene-panel p,
  .scene-status { display: none; }
  .scene-buttons { margin-bottom: 0; }
  .hero-bottom { grid-template-columns: 1fr; padding-block: 14px; gap: 5px; }
  .hero-bottom span { padding: 0; border: 0; }
  .intro,
  .ecosystem,
  .cases,
  .delivery { padding-block: 76px; }
  .intro h2,
  .section-heading h2 { font-size: 34px; }
  .intro-visual { aspect-ratio: .9 / 1; margin-top: 42px; }
  .intro-visual-copy { left: 20px; top: 22px; bottom: auto; right: 20px; }
  .intro-visual-copy strong { font-size: 18px; }
  .temperature-control { left: 18px; right: 18px; bottom: 18px; width: auto; }
  .feature-grid { grid-template-columns: 1fr; }
  .feature-card + .feature-card { padding-left: 0; border-left: 0; }
  .product-matrix { grid-template-columns: 1fr; }
  .product-matrix article:nth-child(even) { border-left: 0; }
  .product-matrix article:last-child { grid-column: auto; }
  .case-grid { grid-template-columns: 1fr; gap: 42px; margin-top: 46px; }
  .case-1 { grid-column: auto; }
  .value-grid { grid-template-columns: 1fr; }
  .value-lead { grid-column: auto; }
  .value-card { min-height: 210px; border-top: 1px solid #cbc6bb; border-left: 0; }
  .delivery-paths article { overflow-x: auto; padding: 22px 18px; }
  .delivery-paths ol { min-width: 520px; }
  .contact { padding-block: 72px; }
  .footer-inner { flex-direction: column; align-items: flex-start; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition-duration: .01ms !important; animation-duration: .01ms !important; }
}