:root {
  --bg: #060606;
  --surface: #0a0a09;
  --text: #ecece7;
  --muted: #969791;
  --dim: #666762;
  --line: rgba(236, 236, 231, .13);
  --metal: #aeb3b0;
  --datum: rgba(225, 228, 224, .3);
  --max: 1360px;
  --font-latin: "Instrument Sans", "Helvetica Neue", Arial, sans-serif;
  --font-cjk: "Noto Sans TC", "PingFang TC", "Microsoft JhengHei", sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; background: var(--bg); }
body {
  margin: 0;
  overflow-x: hidden;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-latin), var(--font-cjk);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
body.menu-open { overflow: hidden; }
::selection { background: #d8dad6; color: #090909; }
a { color: inherit; text-decoration: none; }
button { color: inherit; font: inherit; }
img { display: block; max-width: 100%; }
a:focus-visible, button:focus-visible { outline: 1px solid var(--metal); outline-offset: 5px; }
.site-shell { width: min(calc(100% - 64px), var(--max)); margin: 0 auto; }

.site-header {
  position: sticky;
  top: 0;
  z-index: 40;
  height: 76px;
  border-bottom: 1px solid var(--line);
  background: rgba(6, 6, 6, .92);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
}
.header-inner { height: 100%; display: grid; grid-template-columns: 1fr auto auto; align-items: center; gap: 28px; }
.brand-logo { width: 146px; height: auto; }
.brand-tagline { color: var(--dim); font-size: 10px; letter-spacing: .18em; white-space: nowrap; }
.menu-button { width: 44px; height: 44px; padding: 10px 8px; border: 0; background: transparent; cursor: pointer; display: grid; align-content: center; justify-items: end; gap: 7px; }
.menu-button span { width: 25px; height: 1px; background: #deded8; transition: transform .25s ease; }
.menu-button span:last-child { width: 17px; }
.menu-open .menu-button span:first-child { width: 25px; transform: translateY(4px) rotate(45deg); }
.menu-open .menu-button span:last-child { width: 25px; transform: translateY(-4px) rotate(-45deg); }

.menu-panel { position: fixed; inset: 76px 0 0; z-index: 35; overflow-y: auto; background: rgba(7,7,7,.985); opacity: 0; visibility: hidden; transition: opacity .22s ease, visibility .22s ease; }
.menu-open .menu-panel { opacity: 1; visibility: visible; }
.menu-panel nav { width: min(calc(100% - 64px), var(--max)); margin: 0 auto; padding: 34px 0 64px; }
.menu-panel a { min-height: 70px; display: flex; align-items: center; justify-content: space-between; gap: 28px; padding: 16px 2px; border-bottom: 1px solid var(--line); font-size: clamp(22px, 3.2vw, 38px); font-weight: 400; letter-spacing: -.012em; transition: color .2s ease, padding .2s ease; }
.menu-panel a:hover { color: var(--metal); padding-left: 9px; }
.menu-panel a span { color: var(--dim); font-size: 11px; letter-spacing: .16em; }

.axis-frame { position: relative; }
.axis-frame::before {
  content: "";
  position: absolute;
  inset: 18px;
  z-index: 2;
  pointer-events: none;
  background:
    linear-gradient(var(--datum), var(--datum)) left top / 28px 1px no-repeat,
    linear-gradient(var(--datum), var(--datum)) left top / 1px 28px no-repeat,
    linear-gradient(var(--datum), var(--datum)) right bottom / 28px 1px no-repeat,
    linear-gradient(var(--datum), var(--datum)) right bottom / 1px 28px no-repeat;
}

.series-hero { padding-top: 36px; padding-bottom: 54px; border-bottom: 1px solid var(--line); }
.back-link { min-height: 40px; display: inline-flex; align-items: center; gap: 11px; color: var(--dim); font-size: 10px; letter-spacing: .12em; }
.back-link span { transition: transform .2s ease; }
.back-link:hover { color: var(--text); }
.back-link:hover span { transform: translateX(-3px); }
.hero-grid { display: grid; grid-template-columns: minmax(330px, .7fr) minmax(0, 1.3fr); gap: clamp(48px, 5.5vw, 82px); align-items: stretch; padding-top: 32px; }
.series-hero-copy { align-self: end; padding: 12px 0 8px; }
.eyebrow { color: var(--dim); font-size: 10px; letter-spacing: .19em; }
.series-hero h1 { margin: 14px 0 0; font-size: clamp(62px, 6.5vw, 88px); line-height: .88; font-weight: 500; letter-spacing: -.04em; }
.series-zh { margin-top: 17px; font-size: clamp(22px, 2.4vw, 30px); font-weight: 400; letter-spacing: .03em; }
.series-model { max-width: 500px; margin-top: 28px; padding-top: 15px; border-top: 1px solid var(--line); display: grid; grid-template-columns: 1fr auto; align-items: end; gap: 7px 20px; }
.series-model span { color: var(--dim); font-size: 9px; letter-spacing: .17em; }
.series-model strong { grid-row: 2; font-size: 21px; font-weight: 400; letter-spacing: .02em; }
.series-model em { grid-column: 2; grid-row: 2; color: #c5c6c0; font-size: 12px; font-style: normal; letter-spacing: .07em; }
.finish-selector { max-width: 500px; margin-top: 17px; display: flex; align-items: center; gap: 23px; }
.finish-label { flex: 0 0 auto; color: var(--dim); font-size: 9px; letter-spacing: .18em; }
.finish-options { display: flex; align-items: center; gap: 22px; }
.finish-option { min-height: 44px; padding: 1px 0 0; border: 0; border-bottom: 1px solid transparent; background: transparent; color: #70716c; font-size: 10px; font-weight: 500; letter-spacing: .12em; white-space: nowrap; cursor: pointer; transition: color .18s ease, border-color .18s ease; }
.finish-option:hover { color: #c3c4be; }
.finish-option.is-active { border-bottom-color: #d4d5cf; color: #ecece7; }
[data-finish-image].is-finish-switching { opacity: .28; }
.series-intro { max-width: 610px; margin: 24px 0 0; color: var(--muted); font-size: 14px; line-height: 1.78; letter-spacing: .015em; }
.construction-note { max-width: 550px; margin-top: 25px; display: grid; grid-template-columns: 105px 1fr; gap: 18px; }
.construction-note span { color: var(--metal); font-size: 9px; letter-spacing: .15em; }
.construction-note p { margin: 0; color: #7f807b; font-size: 11px; line-height: 1.7; }
.series-hero-media { position: relative; min-height: 500px; overflow: hidden; background: var(--surface); }
.series-hero-media img { width: 100%; height: 100%; object-fit: cover; transition: opacity .22s ease, transform .7s cubic-bezier(.2,.7,.2,1); }
.series-hero-media:hover img { transform: scale(1.012); }
.media-caption { position: absolute; z-index: 3; left: 26px; bottom: 22px; color: #9b9e98; font-size: 8px; letter-spacing: .17em; }

.product-rail { display: grid; grid-template-columns: repeat(auto-fit, minmax(170px, 1fr)); gap: clamp(28px, 5vw, 74px); margin-top: 45px; padding-top: 19px; border-top: 1px solid var(--line); }
.product-item { min-width: 0; }
.product-label { color: var(--dim); font-size: 9px; letter-spacing: .16em; }
.product-value { margin-top: 8px; color: #b7b8b2; font-size: 11px; line-height: 1.5; letter-spacing: .025em; }

.concept-section { padding-top: 108px; padding-bottom: 122px; }
.section-heading { display: flex; align-items: end; justify-content: space-between; gap: 28px; margin-bottom: 35px; }
.section-heading h2 { margin: 0; font-size: 12px; font-weight: 500; letter-spacing: .18em; }
.section-heading p { margin: 0; color: var(--dim); font-size: 11px; line-height: 1.55; letter-spacing: .03em; }
.concept-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: clamp(38px, 5vw, 72px); }
.concept-card { min-width: 0; }
.single-alternate .concept-card { grid-column: 1; }
.single-alternate.align-end .concept-card { grid-column: 2; }
.concept-visual { position: relative; overflow: hidden; aspect-ratio: 1672 / 941; background: var(--surface); }
.concept-photo { width: 100%; height: 100%; object-fit: cover; transition: transform .7s cubic-bezier(.2,.7,.2,1); }
.concept-visual:hover .concept-photo { transform: scale(1.014); }
.concept-index { position: absolute; z-index: 3; top: 19px; left: 19px; color: #c4c5bf; font-size: 9px; letter-spacing: .14em; }
.concept-copy { padding-top: 27px; }
.concept-kicker { color: var(--dim); font-size: 9px; letter-spacing: .16em; }
.concept-title-row { display: flex; align-items: baseline; justify-content: space-between; gap: 18px; margin-top: 10px; }
.concept-title-row h3 { margin: 0; font-size: clamp(29px, 3.1vw, 42px); line-height: 1; font-weight: 500; letter-spacing: -.025em; }
.concept-title-row span { color: #b0b1ab; font-size: 13px; white-space: nowrap; }
.concept-description { max-width: 40em; margin: 17px 0 0; color: var(--muted); font-size: 13px; line-height: 1.76; letter-spacing: .015em; }

.series-switcher { border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.switcher-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: clamp(24px, 5vw, 72px); }
.series-switcher a { min-width: 0; padding: 28px 0 31px; opacity: .42; transition: opacity .2s ease; }
.series-switcher a:hover, .series-switcher a[aria-current="page"] { opacity: 1; }
.switcher-number { color: var(--dim); font-size: 9px; letter-spacing: .15em; white-space: nowrap; }
.switcher-name { margin-top: 8px; font-size: clamp(20px, 2.4vw, 30px); font-weight: 500; letter-spacing: -.02em; }
.switcher-zh { margin-top: 6px; color: #858681; font-size: 11px; }

.series-release { min-height: 340px; padding-top: 72px; padding-bottom: 76px; display: flex; align-items: end; justify-content: space-between; gap: 54px; border-bottom: 1px solid var(--line); }
.release-eyebrow { color: var(--dim); font-size: 9px; letter-spacing: .17em; }
.series-release h2 { margin: 15px 0 0; font-size: clamp(34px, 4vw, 52px); font-weight: 400; letter-spacing: -.025em; }
.series-release p { max-width: 650px; margin: 20px 0 0; color: var(--muted); font-size: 13px; line-height: 1.8; letter-spacing: .015em; }
.series-release > a { flex: 0 0 auto; padding-bottom: 6px; border-bottom: 1px solid #777973; color: #d4d5cf; font-size: 12px; letter-spacing: .05em; }
.series-release > a:hover { color: #fff; border-color: var(--metal); }

.site-footer { padding-top: 42px; padding-bottom: 52px; display: grid; grid-template-columns: 1fr auto auto; align-items: end; gap: 34px; }
.footer-logo { width: 152px; }
.footer-tagline { margin-top: 11px; color: var(--dim); font-size: 9px; letter-spacing: .18em; }
.footer-social { display: flex; flex-wrap: wrap; justify-content: center; gap: 8px 19px; color: #858681; font-size: 10px; letter-spacing: .04em; }
.footer-social a:hover { color: var(--text); }
.footer-meta { color: #5c5d59; font-size: 9px; line-height: 1.7; text-align: right; letter-spacing: .04em; }

.line-float { position: fixed; right: max(18px, env(safe-area-inset-right)); bottom: max(20px, calc(env(safe-area-inset-bottom) + 16px)); z-index: 50; width: 44px; height: 44px; border: 1px solid rgba(255,255,255,.13); border-radius: 13px; box-shadow: none; opacity: .62; transition: transform .2s ease, opacity .2s ease; }
.line-float:hover, .line-float:focus-visible { transform: translateY(-2px); opacity: 1; outline: none; }
.line-float svg { width: 100%; height: 100%; overflow: visible; filter: grayscale(1) brightness(.75); transition: filter .2s ease; }
.line-float:hover svg, .line-float:focus-visible svg { filter: none; }
.line-float-label { position: absolute; right: 53px; top: 50%; transform: translateY(-50%) translateX(5px); padding: 7px 10px; border: 1px solid var(--line); border-radius: 6px; background: rgba(8,8,8,.96); color: var(--text); font-size: 10px; white-space: nowrap; opacity: 0; visibility: hidden; transition: opacity .18s ease, transform .18s ease; }
.line-float:hover .line-float-label, .line-float:focus-visible .line-float-label { opacity: 1; visibility: visible; transform: translateY(-50%); }

.series-intro, .construction-note p, .concept-description, .series-release p { line-break: strict; word-break: normal; overflow-wrap: break-word; text-wrap: pretty; }

@media (max-width: 900px) {
  .site-shell { width: min(calc(100% - 48px), var(--max)); }
  .hero-grid { grid-template-columns: 1fr; gap: 42px; }
  .series-hero-media { min-height: 0; aspect-ratio: 1672 / 941; }
  .series-hero-copy { max-width: 720px; }
  .product-rail { grid-template-columns: 1fr 1fr; gap: 0 34px; }
  .product-item { padding: 17px 0 20px; border-bottom: 1px solid var(--line); }
  .concept-grid { gap: 48px; }
  .site-footer { grid-template-columns: 1fr auto; }
  .footer-meta { grid-column: 1 / -1; text-align: left; }
}

@media (max-width: 560px) {
  html { scroll-padding-top: calc(64px + env(safe-area-inset-top)); }
  body { overflow-x: clip; }
  .site-shell { width: calc(100% - 40px); }
  .site-header { height: calc(64px + env(safe-area-inset-top)); padding-top: env(safe-area-inset-top); }
  .header-inner { height: 64px; grid-template-columns: 1fr auto; }
  .brand-logo { width: 112px; }
  .brand-tagline { display: none; }
  .menu-button { width: 44px; height: 44px; margin-right: -9px; }
  .menu-panel { inset: calc(64px + env(safe-area-inset-top)) 0 0; overscroll-behavior: contain; }
  .menu-panel nav { width: calc(100% - 40px); padding: 20px 0 calc(30px + env(safe-area-inset-bottom)); }
  .menu-panel a { min-height: 52px; padding: 0 1px; font-size: 20px; }
  .menu-panel a:nth-child(n + 6) { min-height: 42px; font-size: 11px; font-weight: 500; letter-spacing: .14em; }
  .menu-panel a:nth-child(6) { margin-top: 20px; border-top: 1px solid var(--line); }
  .menu-panel a:nth-child(n + 6) span { font-size: 9px; }

  .axis-frame::before { inset: 12px; background-size: 20px 1px, 1px 20px, 20px 1px, 1px 20px; }
  .series-hero { padding-top: 16px; padding-bottom: 48px; }
  .back-link { min-height: 44px; margin-top: -4px; font-size: 9px; }
  .hero-grid { grid-template-columns: 1fr; gap: 0; padding-top: 13px; }
  .series-hero-copy { display: contents; }
  .series-hero .eyebrow { order: 1; font-size: 9px; }
  .series-hero h1 { order: 2; margin-top: 12px; font-size: 58px; line-height: .9; }
  .series-zh { order: 3; margin-top: 13px; font-size: 20px; }
  .series-model { order: 4; margin-top: 21px; padding-top: 12px; }
  .series-model strong { font-size: 18px; }
  .series-hero-copy .finish-selector { order: 5; width: 100%; margin-top: 13px; gap: 18px; }
  .finish-options { gap: 20px; }
  .series-hero-media { order: 6; justify-self: start; width: 100vw; min-height: 0; margin-top: 22px; margin-left: calc((100vw - 100%) / -2); aspect-ratio: 3 / 2; }
  .series-hero-media img { object-position: center; }
  .media-caption { left: 19px; bottom: 15px; font-size: 7px; }
  .series-intro { order: 7; max-width: 32em; margin-top: 27px; font-size: 14px; line-height: 1.8; }
  .construction-note { order: 8; max-width: none; margin-top: 23px; padding-top: 17px; border-top: 1px solid var(--line); grid-template-columns: 92px 1fr; }
  .construction-note p { font-size: 12px; }
  .product-rail { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 0 20px; margin-top: 35px; padding-top: 0; }
  .product-item { min-height: 75px; padding: 15px 0; }
  .product-label { font-size: 9px; }
  .product-value { font-size: 11px; }

  .concept-section { padding-top: 72px; padding-bottom: 80px; }
  .section-heading { align-items: start; flex-direction: column; gap: 9px; margin-bottom: 26px; }
  .section-heading h2 { font-size: 11px; letter-spacing: .15em; }
  .section-heading p { max-width: 31em; font-size: 11.5px; }
  .concept-grid { grid-template-columns: 1fr; gap: 76px; }
  .single-alternate .concept-card, .single-alternate.align-end .concept-card { grid-column: 1; }
  .concept-visual { justify-self: start; width: 100vw; margin-left: calc((100vw - 100%) / -2); aspect-ratio: 3 / 2; }
  .concept-index { top: 16px; left: 20px; }
  .concept-copy { padding-top: 24px; }
  .concept-kicker { font-size: 9px; line-height: 1.55; }
  .concept-title-row { align-items: start; flex-direction: column; gap: 8px; }
  .concept-title-row h3 { font-size: 31px; }
  .concept-title-row span { font-size: 12px; }
  .concept-description { max-width: 32em; font-size: 13px; line-height: 1.76; }

  .switcher-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 0; }
  .series-switcher a { padding: 18px 6px 21px; }
  .switcher-number { overflow: hidden; font-size: 7px; letter-spacing: .07em; }
  .switcher-name { margin-top: 7px; font-size: 16px; }
  .switcher-zh { overflow: hidden; font-size: 9px; white-space: nowrap; }
  .series-release { min-height: 0; align-items: stretch; flex-direction: column; gap: 27px; padding-top: 52px; padding-bottom: 56px; }
  .release-eyebrow { font-size: 8px; }
  .series-release h2 { font-size: 31px; }
  .series-release p { max-width: 32em; font-size: 13.5px; line-height: 1.8; }
  .series-release > a { align-self: start; min-height: 40px; display: inline-flex; align-items: center; }
  .site-footer { grid-template-columns: 1fr; padding-top: 38px; padding-bottom: calc(88px + env(safe-area-inset-bottom)); }
  .footer-social { justify-content: flex-start; }
  .footer-meta { text-align: left; }
  .line-float { right: max(14px, env(safe-area-inset-right)); bottom: max(14px, calc(env(safe-area-inset-bottom) + 12px)); width: 42px; height: 42px; overflow: hidden; border-radius: 50%; opacity: .72; }
  .line-float-label { display: none; }
  .menu-open .line-float { visibility: hidden; pointer-events: none; opacity: 0; }
}

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