:root {
  --black: #0a0a0a;
  --white: #f7f7f3;
  --paper: #ecebe5;
  --silver: #b8bdc3;
  --gold: #c7a96b;
  --coral: #cf5a43;
  --blue: #326aa0;
  --cyan: #72d7d0;
  --line: rgba(255, 255, 255, .18);
  --radius: 6px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
html.is-cms-preview,
html.is-cms-preview body {
  scrollbar-width: none;
  -ms-overflow-style: none;
}
html.is-cms-preview::-webkit-scrollbar,
html.is-cms-preview body::-webkit-scrollbar {
  display: none;
  width: 0;
  height: 0;
}
body {
  margin: 0;
  color: var(--black);
  background: var(--white);
  font-family: "Microsoft YaHei", "PingFang SC", Arial, sans-serif;
  letter-spacing: 0;
}
body[data-lang="en"] { font-family: Arial, Helvetica, sans-serif; }
img { display: block; width: 100%; }
a { color: inherit; text-decoration: none; }
button, input, textarea { font: inherit; letter-spacing: 0; }
button { cursor: pointer; }
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0, 0, 0, 0); white-space: nowrap; border: 0; }
.shell { width: min(1240px, calc(100% - 64px)); margin: 0 auto; }
.eyebrow { margin: 0 0 20px; font-size: 12px; font-weight: 700; text-transform: uppercase; }
.section-title { margin: 0; font-size: 52px; line-height: 1.08; font-weight: 600; }
.section-copy { max-width: 620px; margin: 24px 0 0; color: #555; font-size: 17px; line-height: 1.85; }
.icon { width: 19px; height: 19px; stroke-width: 1.8; }
.button { display: inline-flex; min-height: 48px; align-items: center; justify-content: center; gap: 10px; padding: 0 19px; border: 1px solid currentColor; border-radius: var(--radius); font-weight: 700; }
.button:hover { opacity: .82; }
.button.solid { color: #111; background: #fff; border-color: #fff; }
.button.dark { color: #fff; background: #111; border-color: #111; }
.concept-switcher {
  position: fixed; z-index: 100; left: 50%; bottom: 18px; transform: translateX(-50%);
  display: flex; align-items: center; gap: 4px; padding: 5px;
  color: #fff; background: rgba(10, 10, 10, .92); border: 1px solid rgba(255,255,255,.2); border-radius: 8px;
  box-shadow: 0 10px 30px rgba(0,0,0,.24); backdrop-filter: blur(12px);
}
.concept-switcher > span { padding: 0 9px; color: #aaa; font-size: 11px; }
.concept-switcher a { min-width: 34px; height: 34px; display: grid; place-items: center; border-radius: 5px; font-size: 12px; font-weight: 800; }
.concept-switcher a:hover, .concept-switcher a[aria-current="page"] { color: #111; background: #fff; }
.site-header { position: absolute; z-index: 50; top: 0; left: 0; width: 100%; height: 84px; color: #fff; }
.site-header .shell { height: 100%; display: flex; align-items: center; justify-content: space-between; }
.brand-lockup { display: flex; align-items: center; gap: 12px; font-weight: 800; }
.brand-thumb { width: 42px; height: 42px; overflow: hidden; border: 1px solid rgba(255,255,255,.32); border-radius: 4px; background: #000; }
.brand-thumb img { width: 100%; height: 100%; object-fit: cover; }
.brand-lockup small { display: block; margin-top: 2px; color: #bbb; font-size: 9px; font-weight: 600; }
.site-nav { display: flex; align-items: center; gap: 30px; font-size: 14px; }
.site-nav a { padding: 8px 0; }
.header-actions { display: flex; align-items: center; gap: 8px; }
.icon-button { width: 40px; height: 40px; display: grid; place-items: center; padding: 0; color: inherit; background: transparent; border: 1px solid rgba(255,255,255,.35); border-radius: 5px; }
.menu-button { display: none; }
.hero { min-height: 78svh; position: relative; display: flex; align-items: flex-end; overflow: hidden; color: #fff; background: #111; }
.hero-media { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; }
.hero-shade { position: absolute; inset: 0; background: rgba(0,0,0,.52); }
.hero-content { position: relative; z-index: 2; width: 100%; padding: 150px 0 70px; }
.hero h1 { margin: 0; font-size: 82px; line-height: 1; font-weight: 500; }
.hero-lead { max-width: 660px; margin: 26px 0 34px; font-size: 20px; line-height: 1.65; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; }
.service-strip { display: grid; grid-template-columns: repeat(3, 1fr); border-bottom: 1px solid #bbb; }
.service-strip article { min-height: 250px; padding: 44px; border-right: 1px solid #bbb; }
.service-strip article:last-child { border-right: 0; }
.service-number { font-size: 12px; font-weight: 800; }
.service-strip h3 { margin: 44px 0 15px; font-size: 24px; }
.service-strip p { margin: 0; color: #666; line-height: 1.75; }
.case-image { position: relative; overflow: hidden; background: #ddd; }
.case-image img { height: 100%; object-fit: cover; transition: transform .5s ease; }
.case-image:hover img { transform: scale(1.025); }
.case-caption { position: absolute; inset: auto 0 0; padding: 20px; color: #fff; background: rgba(0,0,0,.62); }
.case-caption span { display: block; margin-bottom: 6px; font-size: 11px; opacity: .75; }
.case-caption strong { font-size: 18px; }
.contact-form { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.contact-form .wide { grid-column: 1 / -1; }
.contact-form label { display: grid; gap: 8px; font-size: 12px; font-weight: 700; }
.contact-form input, .contact-form textarea { width: 100%; padding: 14px 0; color: inherit; background: transparent; border: 0; border-bottom: 1px solid currentColor; border-radius: 0; outline: 0; }
.contact-form textarea { min-height: 100px; resize: vertical; }
.form-message { grid-column: 1 / -1; margin: 0; font-size: 12px; }
.contact-data-notice { margin: 2px 0 0; color: currentColor; font-size: 11px; line-height: 1.65; opacity: .72; }
.contact-data-notice a { text-decoration: underline; text-underline-offset: 2px; }
.site-footer { padding: 34px 0 88px; border-top: 1px solid currentColor; }
.footer-row { display: flex; align-items: center; justify-content: space-between; gap: 24px; font-size: 12px; }
.footer-links { display: inline-flex; flex-wrap: wrap; gap: 12px; }

/* Concept A: Industrial editorial */
.concept-a { background: #111; color: #f5f4ef; }
.concept-a .hero { min-height: 82svh; }
.concept-a .hero-media { object-position: center 58%; }
.concept-a .hero-shade { background: rgba(0,0,0,.57); }
.concept-a .hero h1 { font-size: 92px; }
.concept-a .hero .eyebrow { color: var(--gold); }
.concept-a .service-strip { background: #e9e8e2; color: #111; border-color: #aaa; }
.concept-a .cases-section { padding: 110px 0; }
.concept-a .cases-head { display: flex; justify-content: space-between; align-items: end; gap: 40px; margin-bottom: 44px; }
.concept-a .cases-head p { max-width: 420px; margin: 0; color: #aaa; line-height: 1.75; }
.concept-a .cases-grid { display: grid; grid-template-columns: 1.35fr .9fr; grid-template-rows: 280px 280px; gap: 12px; }
.concept-a .cases-grid .case-image:first-child { grid-row: 1 / 3; }
.concept-a .jiling-band { display: grid; grid-template-columns: .9fr 1.1fr; min-height: 510px; background: #dfe3e1; color: #111; }
.concept-a .jiling-copy { padding: 74px max(40px, calc((100vw - 1240px) / 2)); padding-right: 50px; align-self: center; }
.concept-a .jiling-copy p { max-width: 560px; color: #4f5553; line-height: 1.8; }
.concept-a .jiling-visual { position: relative; overflow: hidden; background: #050505; }
.concept-a .jiling-visual img { width: 100%; height: 100%; object-fit: cover; }
.concept-a .contact-section { display: grid; grid-template-columns: 1fr 1fr; min-height: 560px; }
.concept-a .contact-intro { padding: 84px max(40px, calc((100vw - 1240px) / 2)); background: var(--gold); color: #111; }
.concept-a .contact-panel { padding: 84px max(40px, calc((100vw - 1240px) / 2)); padding-left: 56px; }

/* Concept B: Design archive */
.concept-b { background: #f4f3ee; color: #171717; }
.concept-b .site-header { color: #111; background: rgba(244,243,238,.92); border-bottom: 1px solid #aaa; }
.concept-b .brand-thumb { border-color: #999; }
.concept-b .brand-lockup small { color: #666; }
.concept-b .icon-button { border-color: #888; }
.concept-b .hero { min-height: 76svh; margin-top: 84px; align-items: stretch; color: #111; background: #ddd; }
.concept-b .hero-media { filter: grayscale(1); object-position: center 55%; }
.concept-b .hero-shade { background: rgba(244,243,238,.32); }
.concept-b .hero-content { display: flex; align-items: flex-end; }
.concept-b .hero-copy-block { width: min(760px, 80%); padding: 50px; background: #f4f3ee; border-top: 7px solid var(--coral); }
.concept-b .hero h1 { font-size: 76px; }
.concept-b .hero-lead { max-width: 590px; margin-bottom: 0; }
.concept-b .archive-intro { display: grid; grid-template-columns: 260px 1fr; padding: 110px 0 70px; border-bottom: 1px solid #aaa; }
.concept-b .archive-intro .section-copy { margin-top: 0; }
.concept-b .service-list { border-bottom: 1px solid #aaa; }
.concept-b .service-row { display: grid; grid-template-columns: 120px 1fr 1fr 48px; align-items: center; gap: 28px; min-height: 165px; border-top: 1px solid #aaa; }
.concept-b .service-row strong { font-size: 30px; font-weight: 500; }
.concept-b .service-row p { color: #666; line-height: 1.7; }
.concept-b .work-index { padding: 110px 0; }
.concept-b .index-grid { display: grid; grid-template-columns: repeat(12, 1fr); gap: 16px; margin-top: 50px; }
.concept-b .index-grid .case-image { min-height: 440px; }
.concept-b .index-grid .case-image:nth-child(1) { grid-column: 1 / 8; }
.concept-b .index-grid .case-image:nth-child(2) { grid-column: 8 / 13; margin-top: 80px; }
.concept-b .index-grid .case-image:nth-child(3) { grid-column: 3 / 11; min-height: 360px; }
.concept-b .jiling-ledger { padding: 90px 0; color: #fff; background: #202b32; }
.concept-b .ledger-grid { display: grid; grid-template-columns: 1fr 1fr; align-items: center; gap: 70px; }
.concept-b .ledger-mark { max-width: 420px; aspect-ratio: 1; object-fit: cover; border-radius: var(--radius); }
.concept-b .contact-section { padding: 100px 0; }
.concept-b .contact-grid { display: grid; grid-template-columns: .8fr 1.2fr; gap: 90px; }

/* Concept C: Digital showroom */
.concept-c { color: #f8f8f5; background: #080909; }
.concept-c .site-header { border-bottom: 1px solid rgba(255,255,255,.15); }
.concept-c .hero { min-height: 80svh; }
.concept-c .hero-media { object-position: center 48%; }
.concept-c .hero-shade { background: rgba(0,0,0,.46); }
.concept-c .hero-content { display: grid; grid-template-columns: 1.2fr .8fr; align-items: end; gap: 50px; }
.concept-c .hero h1 { max-width: 720px; font-size: 82px; }
.concept-c .hero-aside { padding: 24px 0 10px; border-top: 1px solid #fff; }
.concept-c .hero-aside p { line-height: 1.8; }
.concept-c .showroom-marquee { overflow: hidden; padding: 22px 0; color: #111; background: var(--cyan); white-space: nowrap; }
.concept-c .showroom-marquee div { font-size: 18px; font-weight: 800; word-spacing: 28px; }
.concept-c .showroom-services { display: grid; grid-template-columns: 1fr 1fr; }
.concept-c .showroom-services-header { min-height: 560px; padding: 90px max(40px, calc((100vw - 1240px) / 2)); background: #f0efe8; color: #111; }
.concept-c .showroom-services-header p { color: #555; }
.concept-c .service-stage { display: grid; grid-template-rows: repeat(3, 1fr); }
.concept-c .stage-row { display: grid; grid-template-columns: 72px 1fr; align-items: center; gap: 28px; padding: 40px; border-bottom: 1px solid #333; background: #131515; }
.concept-c .stage-row:last-child { border-bottom: 0; }
.concept-c .stage-row span { color: var(--cyan); font-size: 12px; }
.concept-c .stage-row h3 { margin: 0 0 12px; font-size: 28px; }
.concept-c .stage-row p { margin: 0; color: #aaa; line-height: 1.6; }
.concept-c .showroom-cases { padding: 100px 0; }
.concept-c .showroom-cases .section-title { max-width: 720px; }
.concept-c .showcase-flow { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; margin-top: 50px; }
.concept-c .showcase-flow .case-image { aspect-ratio: 4 / 5; }
.concept-c .showcase-flow .case-image:nth-child(2) { margin-top: 70px; }
.concept-c .jiling-room { display: grid; grid-template-columns: 1.1fr .9fr; min-height: 560px; color: #111; background: #f0efe8; }
.concept-c .jiling-room-copy { align-self: center; padding: 70px max(40px, calc((100vw - 1240px) / 2)); padding-right: 50px; }
.concept-c .jiling-room-copy .section-title { max-width: 600px; }
.concept-c .jiling-room-copy p { max-width: 560px; color: #555; line-height: 1.8; }
.concept-c .jiling-room-visual { position: relative; background: #031819; overflow: hidden; }
.concept-c .jiling-room-visual img { height: 100%; object-fit: cover; }
.concept-c .contact-section { padding: 100px 0; }
.concept-c .contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 90px; }

/* Design chooser */
.review-page { min-height: 100vh; color: #111; background: #edede9; }
.review-header { padding: 70px 0 40px; }
.review-header h1 { max-width: 900px; margin: 0; font-size: 58px; line-height: 1.12; }
.review-header p { max-width: 680px; margin: 24px 0 0; color: #5b5b5b; line-height: 1.8; }
.review-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; padding-bottom: 80px; }
.review-card { display: block; overflow: hidden; background: #fff; border: 1px solid #bbb; border-radius: var(--radius); }
.review-card img { height: 370px; object-fit: cover; }
.review-card-content { min-height: 220px; padding: 24px; }
.review-card .label { color: #666; font-size: 11px; }
.review-card h2 { margin: 12px 0; font-size: 28px; }
.review-card p { min-height: 74px; margin: 0 0 20px; color: #666; line-height: 1.65; }
.review-card .open { display: flex; align-items: center; justify-content: space-between; font-weight: 800; }
.review-card:hover .open { color: var(--blue); }

@media (max-width: 900px) {
  .shell { width: min(100% - 32px, 720px); }
  .section-title { font-size: 40px; }
  .site-header { height: 70px; }
  .site-nav { position: fixed; inset: 70px 0 auto; display: none; padding: 24px 20px; color: #111; background: #fff; border-bottom: 1px solid #ccc; }
  .menu-open .site-nav { display: grid; gap: 8px; }
  .menu-button { display: grid; }
  .hero, .concept-a .hero, .concept-b .hero, .concept-c .hero { min-height: 72svh; }
  .hero-content, .concept-c .hero-content { display: block; padding: 130px 0 48px; }
  .hero h1, .concept-a .hero h1, .concept-b .hero h1, .concept-c .hero h1 { font-size: 56px; }
  .hero-lead { font-size: 17px; }
  .service-strip { grid-template-columns: 1fr; }
  .service-strip article { min-height: auto; border-right: 0; border-bottom: 1px solid #bbb; }
  .concept-a .cases-head { display: block; }
  .concept-a .cases-head p { margin-top: 24px; }
  .concept-a .jiling-band, .concept-a .contact-section, .concept-b .ledger-grid, .concept-b .contact-grid, .concept-c .showroom-services, .concept-c .jiling-room, .concept-c .contact-grid { grid-template-columns: 1fr; }
  .concept-a .jiling-visual, .concept-c .jiling-room-visual { min-height: 380px; }
  .concept-a .contact-intro, .concept-a .contact-panel, .concept-c .showroom-services-header { padding: 64px 28px; }
  .concept-b .hero { margin-top: 70px; }
  .concept-b .hero-copy-block { width: 90%; padding: 34px; }
  .concept-b .archive-intro { grid-template-columns: 1fr; gap: 30px; padding: 70px 0 50px; }
  .concept-b .service-row { grid-template-columns: 60px 1fr 42px; padding: 28px 0; }
  .concept-b .service-row p { grid-column: 2 / 4; }
  .concept-b .index-grid .case-image:nth-child(n) { grid-column: 1 / 13; min-height: 380px; margin-top: 0; }
  .concept-c .showroom-services-header { min-height: auto; }
  .showcase-flow { overflow-x: auto; }
  .concept-c .showcase-flow { grid-template-columns: repeat(3, minmax(270px, 1fr)); }
  .review-grid { grid-template-columns: 1fr; }
  .review-card { display: grid; grid-template-columns: 1fr 1fr; }
  .review-card img { height: 100%; }
}

@media (max-width: 620px) {
  .shell { width: calc(100% - 28px); }
  .brand-lockup span { display: none; }
  .site-nav { top: 64px; }
  .hero, .concept-a .hero, .concept-b .hero, .concept-c .hero { min-height: 640px; }
  .hero h1, .concept-a .hero h1, .concept-b .hero h1, .concept-c .hero h1 { font-size: 43px; line-height: 1.08; }
  .section-title { font-size: 34px; }
  .concept-a .cases-section, .concept-b .work-index, .concept-c .showroom-cases, .concept-c .contact-section { padding: 72px 0; }
  .concept-a .cases-grid { grid-template-columns: 1fr; grid-template-rows: repeat(3, 330px); }
  .concept-a .cases-grid .case-image:first-child { grid-row: auto; }
  .concept-a .jiling-copy, .concept-c .jiling-room-copy { padding: 60px 24px; }
  .contact-form { grid-template-columns: 1fr; }
  .contact-form .wide { grid-column: auto; }
  .concept-b .hero-copy-block { width: 100%; padding: 28px 20px; }
  .concept-b .service-row { grid-template-columns: 42px 1fr 36px; gap: 12px; }
  .concept-b .service-row strong { font-size: 24px; }
  .concept-b .ledger-grid { gap: 40px; }
  .concept-c .stage-row { grid-template-columns: 42px 1fr; padding: 30px 20px; gap: 14px; }
  .review-header { padding-top: 46px; }
  .review-header h1 { font-size: 40px; }
  .review-card { display: block; }
  .review-card img { height: 260px; }
  .concept-switcher > span { display: none; }
  .footer-row { align-items: flex-start; flex-direction: column; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .case-image img { transition: none; }
}