/* LH-HY — Premium Korean Silicone Sealants
   Palette taken from the trade itself: anodised aluminium, float glass,
   bronze frame finish and the sealant bead. */

:root {
  --alu: #eef0f5;        /* page background — cool aluminium, nudged toward the logo navy */
  --paper: #f9fafc;      /* raised surfaces */
  --ink: #1e285d;        /* LH-HY logo navy */
  --steel: #4b5470;      /* secondary text, kept dark for small Chinese text */
  --rule: #cfd4e0;       /* joints and dividers */
  --glass: #c9d9ea;      /* glazing tint */
  --glass-deep: #2b4a86;
  --bronze: #f57a36;     /* LH-HY logo orange (accent marks, never small text) */
  --bronze-ink: #b4470f; /* orange dark enough for text on light */
  --bead: #ffffff;
  --tile: #0d1017;       /* product photo tiles (photos are shot on black) */
  --wa: #1f7a4d;         /* WhatsApp action */

  --font: "Archivo", "Noto Sans TC", "PingFang HK", "Microsoft JhengHei", system-ui, sans-serif;
  --font-zh: "Noto Sans TC", "Noto Sans CJK TC", "PingFang HK", "PingFang TC", "Microsoft JhengHei", "Heiti TC", sans-serif;

  --s-1: .8125rem; --s0: 1rem; --s1: 1.125rem; --s2: 1.375rem;
  --s3: 1.75rem; --s4: 2.375rem; --s5: 3.25rem; --s6: 4.5rem;

  --gutter: clamp(16px, 4vw, 48px);
  --max: 1200px;
  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --alu: #121630; --paper: #1a1f3d; --ink: #e8ebf5; --steel: #a3abc6;
    --rule: #323a60; --glass: #2a3d66; --glass-deep: #a9c1ea;
    --bronze: #ff8f4f; --bronze-ink: #ffa36b; --bead: #e8ebf5; --tile: #080a10; --wa: #43b37a;
    color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --alu: #121630; --paper: #1a1f3d; --ink: #e8ebf5; --steel: #a3abc6;
    --rule: #323a60; --glass: #2a3d66; --glass-deep: #a9c1ea;
    --bronze: #ff8f4f; --bronze-ink: #ffa36b; --bead: #e8ebf5; --tile: #080a10; --wa: #43b37a;
  color-scheme: dark;
}

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  margin: 0; background: var(--alu); color: var(--ink);
  font-family: var(--font); font-size: var(--s0); line-height: 1.6;
  font-variation-settings: "wdth" 100;
}
html[lang="zh-HK"] body { font-family: var(--font-zh); line-height: 1.75; }
img { max-width: 100%; height: auto; display: block; }
a { color: inherit; }
:focus-visible { outline: 3px solid var(--bronze); outline-offset: 3px; border-radius: 2px; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } *, *::before, *::after { animation: none !important; transition: none !important; } }

/* ---------- bilingual ---------- */
.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; }

.wrap { width: 100%; max-width: var(--max); margin: 0 auto; padding: 0 var(--gutter); }
.skip { position: absolute; left: -999px; top: 8px; background: var(--ink); color: var(--paper); padding: 8px 12px; z-index: 99; }
.skip:focus { left: 8px; }

/* ---------- header ---------- */
.site-header {
  position: sticky; top: 0; z-index: 20;
  background: color-mix(in srgb, var(--alu) 92%, transparent);
  backdrop-filter: saturate(1.2) blur(8px);
  border-bottom: 1px solid var(--rule);
}
.site-header .wrap { display: flex; align-items: center; gap: 24px; min-height: 68px; }
.brand { display: flex; align-items: center; gap: 12px; text-decoration: none; margin-right: auto; }
.brand img { height: 52px; width: auto; }
:root[data-theme="dark"] .brand img { background: #fff; border-radius: 6px; padding: 3px; }
@media (prefers-color-scheme: dark) { :root:not([data-theme="light"]) .brand img { background: #fff; border-radius: 6px; padding: 3px; } }
.brand-word { font-weight: 600; font-size: .8125rem; color: var(--steel); }
.brand-word.old { font-weight: 800; font-size: 1.25rem; letter-spacing: .01em; font-variation-settings: "wdth" 112; line-height: 1; }
.brand-word small { display: block; font-weight: 500; font-size: .75rem; color: var(--steel); letter-spacing: 0; font-variation-settings: "wdth" 100; margin-top: 3px; }
.nav { display: flex; gap: 4px; align-items: center; }
.nav a { text-decoration: none; padding: 8px 12px; border-radius: 6px; font-weight: 600; font-size: .9375rem; }
.nav a:hover { background: var(--paper); }
.nav a[aria-current="page"] { box-shadow: inset 0 -2px 0 var(--bronze); border-radius: 0; }
.lang-toggle { text-decoration: none; display: inline-flex; align-items: center; justify-content: center;
  border: 1px solid var(--rule); background: var(--paper); color: var(--ink);
  font: 600 .875rem var(--font); padding: 7px 12px; border-radius: 999px; cursor: pointer;
}
.lang-toggle:hover { border-color: var(--steel); }
.menu-btn { display: none; border: 1px solid var(--rule); background: var(--paper); color: var(--ink); border-radius: 6px; padding: 8px 10px; font: 600 .875rem var(--font); cursor: pointer; }

@media (max-width: 860px) {
  .menu-btn { display: inline-block; }
  .nav { display: none; position: absolute; top: 68px; left: 0; right: 0; flex-direction: column; align-items: stretch;
         background: var(--paper); border-bottom: 1px solid var(--rule); padding: 8px var(--gutter) 16px; }
  .nav.open { display: flex; }
  .nav a { padding: 12px 4px; border-bottom: 1px solid var(--rule); border-radius: 0; }
  .nav a[aria-current="page"] { box-shadow: inset 3px 0 0 var(--bronze); padding-left: 12px; }
  .brand-word small { display: none; }
}

/* ---------- buttons ---------- */
.btn {
  display: inline-flex; align-items: center; gap: 10px; text-decoration: none;
  font: 700 1rem var(--font); padding: 14px 22px; border-radius: 8px; border: 2px solid var(--ink);
  background: var(--ink); color: var(--paper); cursor: pointer;
}
html[lang="zh-HK"] .btn { font-family: var(--font-zh); }
.btn:hover { background: var(--bronze-ink); border-color: var(--bronze-ink); }
.btn.ghost { background: transparent; color: var(--ink); }
.btn.ghost:hover { background: var(--paper); }
.btn.wa { background: var(--wa); border-color: var(--wa); color: #fff; }
.btn.wa:hover { filter: brightness(1.08); }
.btn svg { width: 20px; height: 20px; flex: none; }

/* ---------- hero: the joint ---------- */
.hero { position: relative; overflow: hidden; border-bottom: 1px solid var(--rule); }
.hero .wrap { display: grid; grid-template-columns: 1.05fr .95fr; gap: 40px; align-items: center; padding-top: 64px; padding-bottom: 72px; }
.hero h1 {
  font-size: clamp(2.25rem, 5.2vw, var(--s6)); line-height: 1.02; margin: 0 0 24px;
  font-weight: 800; font-variation-settings: "wdth" 118; letter-spacing: -.01em; max-width: 14ch;
}
html[lang="zh-HK"] .hero h1 { font-weight: 900; line-height: 1.15; letter-spacing: .02em; max-width: none; font-variation-settings: normal; }
.hero p.lede { font-size: var(--s1); color: var(--steel); max-width: 46ch; margin: 0 0 32px; }
.hero .actions { display: flex; flex-wrap: wrap; gap: 12px; }
.joint { width: 100%; height: auto; }
.joint .frame { fill: var(--ink); }
.joint .frame-face { fill: #34407e; }
.joint .glass { fill: var(--glass); }
.joint .glass-hi { fill: none; stroke: color-mix(in srgb, var(--paper) 70%, transparent); stroke-width: 3; }
.joint .gap { fill: var(--alu); }
.joint .bead { fill: none; stroke: #eef1f4; stroke-width: 15; stroke-linecap: round; stroke-linejoin: round;
               stroke-dasharray: 1000; stroke-dashoffset: 1000; filter: drop-shadow(0 2px 1.5px rgba(0,0,0,.3)); }
.joint .bead-hi { fill: none; stroke: #fff; stroke-width: 3; stroke-linecap: round; stroke-linejoin: round; stroke-dasharray: 1000; stroke-dashoffset: 1000; opacity: .9; }
.joint .gun { transition: opacity .2s; }
.joint .nozzle { fill: #f3f4f6; stroke: #9aa3b5; stroke-width: 1.5; }
.joint .cart-cap { fill: #d9dde5; }
.joint .cart { fill: #f7f8fa; stroke: #9aa3b5; stroke-width: 1.5; }
.joint .cart-label { fill: #1aa3c4; }
.joint .cart-band { fill: #1e285d; }
.joint .cart-end { fill: #f57a36; }
.joint { overflow: hidden; }
.hero-media { margin: 0; }
.hero-media video { width: 100%; border-radius: 12px; display: block; aspect-ratio: 4 / 3; object-fit: cover; background: var(--tile); }
.joint .lbl { font: 600 13px var(--font); fill: var(--steel); }
.joint .lbl-line { stroke: var(--steel); stroke-width: 1; }

@media (max-width: 860px) {
  .hero .wrap { grid-template-columns: 1fr; padding-top: 40px; padding-bottom: 48px; }
  .hero figure { max-width: 320px; }
}

/* ---------- credentials: three roles ---------- */
.roles { background: var(--paper); border-bottom: 1px solid var(--rule); }
.roles .wrap { display: grid; grid-template-columns: repeat(3, 1fr); }
.role { padding: 28px 28px 28px 0; display: grid; grid-template-columns: 96px 1fr; gap: 18px; align-items: center; text-decoration: none; }
.role + .role { padding-left: 28px; border-left: 1px solid var(--rule); }
.role .logo { height: 64px; display: flex; align-items: center; justify-content: center; background: #fff; border: 1px solid var(--rule); border-radius: 6px; padding: 6px; }
.role .logo img { max-height: 100%; width: auto; }
.role .logo .wordmark { font-weight: 900; color: #1b232b; font-size: 1.125rem; font-variation-settings: "wdth" 120; }
.role strong { display: block; font-size: var(--s1); line-height: 1.25; }
.role span { color: var(--steel); font-size: .9375rem; }
.role:hover strong { text-decoration: underline; text-decoration-color: var(--bronze); text-underline-offset: 4px; }
@media (max-width: 860px) {
  .roles .wrap { grid-template-columns: 1fr; }
  .role, .role + .role { padding: 20px 0; border-left: 0; }
  .role + .role { border-top: 1px solid var(--rule); }
}

/* ---------- sections ---------- */
section.block { padding: 80px 0; }
section.block + section.block { border-top: 1px solid var(--rule); }
.section-head { display: grid; grid-template-columns: 1fr 1fr; gap: 32px; align-items: end; margin-bottom: 40px; }
.section-head h2, h2.h { font-size: clamp(1.75rem, 3.4vw, var(--s5)); line-height: 1.08; margin: 0; font-weight: 800; font-variation-settings: "wdth" 112; }
html[lang="zh-HK"] .section-head h2, html[lang="zh-HK"] h2.h { line-height: 1.25; font-variation-settings: normal; }
.section-head p { margin: 0; color: var(--steel); max-width: 52ch; }
@media (max-width: 860px) { .section-head { grid-template-columns: 1fr; gap: 12px; } section.block { padding: 56px 0; } }

/* ---------- application picker ---------- */
.jobs { display: grid; grid-template-columns: repeat(3, 1fr); border: 1px solid var(--rule); border-radius: 10px; overflow: hidden; background: var(--paper); }
.job { padding: 24px; border-right: 1px solid var(--rule); display: flex; flex-direction: column; gap: 10px; }
.job:last-child { border-right: 0; }
.job svg { width: 44px; height: 44px; color: var(--glass-deep); }
.job h3 { margin: 0; font-size: var(--s1); line-height: 1.3; }
.job p { margin: 0; color: var(--steel); font-size: .9375rem; flex: 1; }
.job .picks { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 6px; }
.job .picks a { font-weight: 700; font-size: .875rem; text-decoration: none; padding: 4px 10px; border-radius: 999px; border: 1px solid var(--rule); background: var(--alu); }
.job .picks a:hover { border-color: var(--bronze); color: var(--bronze-ink); }

@media (max-width: 760px) { .jobs { grid-template-columns: 1fr; } .job { border-right: 0; border-bottom: 1px solid var(--rule); } .job:last-child { border-bottom: 0; } }

/* ---------- product range ---------- */
.range-group + .range-group { margin-top: 56px; }
.range-title { display: flex; align-items: baseline; gap: 16px; flex-wrap: wrap; padding-bottom: 14px; border-bottom: 2px solid var(--ink); margin-bottom: 0; }
.range-title h3 { margin: 0; font-size: var(--s3); font-weight: 800; font-variation-settings: "wdth" 115; }
.range-title p { margin: 0; color: var(--steel); }
.range-title a { margin-left: auto; font-weight: 700; text-decoration-color: var(--bronze); text-underline-offset: 4px; }

.products { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); column-gap: 40px; }
.product { padding: 28px 0; display: grid; grid-template-rows: auto auto 1fr auto; gap: 12px; border-bottom: 1px solid var(--rule); }

.product .shot { aspect-ratio: 4 / 3; background: var(--paper); border-radius: 8px; display: flex; align-items: center; justify-content: center; overflow: hidden; border: 1px solid var(--rule); }
.product .shot { background: var(--tile); border-color: var(--tile); }
.product .shot img { width: 100%; height: 100%; object-fit: contain; }
.shot.ph { color: #fff; }
.shot.ph span { font-weight: 900; font-size: 2rem; font-variation-settings: "wdth" 120; letter-spacing: .02em; border-bottom: 4px solid var(--bronze); padding-bottom: 4px; }
.product h3 { margin: 0; font-size: var(--s2); font-weight: 800; font-variation-settings: "wdth" 110; line-height: 1.15; }
.product h3 small { display: block; font-size: .9375rem; font-weight: 600; color: var(--steel); font-variation-settings: "wdth" 100; margin-top: 4px; }
.product p { margin: 0; color: var(--steel); font-size: .9375rem; }
.product .meta { display: flex; flex-wrap: wrap; gap: 8px 16px; align-items: center; font-size: .875rem; }
.badge { display: inline-block; font-weight: 700; font-size: .8125rem; padding: 3px 9px; border-radius: 4px; background: var(--ink); color: var(--paper); }
.badge.bronze { background: var(--bronze-ink); color: #fff; }
@media (max-width: 960px) { .products { grid-template-columns: repeat(2, minmax(0, 1fr)); column-gap: 24px; } }
@media (max-width: 600px) { .products { grid-template-columns: 1fr; } .product { padding: 24px 0; } }

/* TOPP + KCC side by side: one product each */
.pair { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; margin-top: 56px; }
.pair .range-group + .range-group { margin-top: 0; }
.pair .products { grid-template-columns: 1fr; }
.pair .product { padding-right: 0; }
.pair .product .shot { aspect-ratio: 16 / 9; }
@media (max-width: 760px) { .pair { grid-template-columns: 1fr; gap: 56px; } }

/* TOPP: our own brand gets a wide feature row */
.topp-feature { display: grid; grid-template-columns: 1fr 1fr; gap: 40px; padding: 28px 0; border-bottom: 1px solid var(--rule); align-items: center; }
.topp-feature .shot { background: var(--tile); border-radius: 8px; overflow: hidden; display: block; aspect-ratio: 650 / 555; }
.topp-feature .shot img { width: 100%; height: 100%; object-fit: cover; }
.topp-feature .body { display: grid; gap: 16px; min-width: 0; }
.topp-feature h4 { margin: 0; font-size: var(--s3); line-height: 1.2; }
.topp-feature p { margin: 0; color: var(--steel); max-width: 60ch; }
.topp-feature .badges { display: flex; flex-wrap: wrap; gap: 6px; }
.topp-feature .meta { display: flex; flex-wrap: wrap; gap: 8px 12px; align-items: center; }
.ticks { margin: 0; padding: 0; list-style: none; display: grid; grid-template-columns: 1fr 1fr; gap: 6px 24px; }
.ticks li { padding-left: 22px; position: relative; }
.ticks li::before { content: ""; position: absolute; left: 0; top: .62em; width: 12px; height: 4px; border-radius: 2px; background: var(--bronze); }
@media (max-width: 760px) { .topp-feature { grid-template-columns: 1fr; gap: 20px; } .ticks { grid-template-columns: 1fr; } }

/* range: three products, one per brand */
.range3 { border-top: 2px solid var(--ink); }
.range3 .product { grid-template-rows: auto auto auto 1fr auto auto auto; }
.brand-tag { margin: 4px 0 0 !important; font-size: .875rem !important; color: var(--steel); }
.brand-tag b { color: var(--ink); margin-right: 6px; }
.product .meta:empty { display: none; }
.product .more { font-weight: 700; color: var(--ink); text-decoration-color: var(--bronze); text-underline-offset: 5px; text-decoration-thickness: 2px; padding: 6px 0; }

/* colour chips — the actual colours each product comes in */
.chips { display: flex; gap: 6px; align-items: center; list-style: none; margin: 0; padding: 0; }
.chips li { width: 22px; height: 22px; border-radius: 50%; border: 1px solid rgba(0,0,0,.25); position: relative; }
.chips li.c-white { background: #fbfbf8; }
.chips li.c-black { background: #1a1a1a; }
.chips li.c-grey { background: #8d9399; }
.chips li.c-bronze { background: #6b4a2e; }
.chips li.c-ivory { background: #efe6cf; }
.chips li.c-clear { background: linear-gradient(135deg, #e9f3f5 0 45%, #bcd6db 45% 55%, #e9f3f5 55%); }
.chips li.c-champagne { background: #d9c6a0; }
.chips li.c-beige { background: #d7c3a3; }
.chips-label { color: var(--steel); font-size: .8125rem; }

/* ---------- proof ---------- */
.proof { display: grid; grid-template-columns: 1.1fr .9fr; gap: 56px; align-items: start; }
.proof ul.facts { list-style: none; margin: 0; padding: 0; }
.proof ul.facts li { display: grid; grid-template-columns: 150px 1fr; gap: 20px; padding: 18px 0; border-top: 1px solid var(--rule); }
.proof ul.facts li:last-child { border-bottom: 1px solid var(--rule); }
.proof ul.facts b { font-size: var(--s2); font-weight: 800; font-variation-settings: "wdth" 115; line-height: 1.1; }
.proof ul.facts span { color: var(--steel); }
.plate { background: var(--ink); color: var(--paper); border-radius: 10px; padding: 32px; display: grid; gap: 18px; }
.plate img { border-radius: 6px; background: #fff; }
.plate .plate-title { margin: 0; font-size: var(--s2); line-height: 1.35; font-weight: 700; }
.plate p { margin: 0; color: color-mix(in srgb, var(--paper) 78%, transparent); }
.plate a { color: var(--paper); font-weight: 700; text-underline-offset: 4px; }
@media (max-width: 860px) { .proof { grid-template-columns: 1fr; gap: 32px; } .proof ul.facts li { grid-template-columns: 1fr; gap: 4px; } }

/* ---------- brand page ---------- */
.page-head { border-bottom: 1px solid var(--rule); background: var(--paper); }
.page-head .wrap { display: grid; grid-template-columns: 1fr auto; gap: 32px; align-items: center; padding-top: 56px; padding-bottom: 48px; }
.page-head h1 { margin: 0 0 12px; font-size: clamp(2rem, 4.6vw, var(--s6)); line-height: 1.04; font-weight: 800; font-variation-settings: "wdth" 118; }
html[lang="zh-HK"] .page-head h1 { line-height: 1.2; font-variation-settings: normal; }
.page-head p { margin: 0; color: var(--steel); max-width: 60ch; font-size: var(--s1); }
.page-head .role-tag { display: inline-block; margin-bottom: 16px; font-weight: 700; color: var(--bronze-ink); border-bottom: 2px solid var(--bronze); }
.page-head .brand-logo { width: 220px; height: 120px; background: #fff; border: 1px solid var(--rule); border-radius: 10px; display: flex; align-items: center; justify-content: center; padding: 16px; }
.page-head .brand-logo img { max-height: 100%; width: auto; }
.page-head .brand-logo .wordmark { font-weight: 900; font-size: 2rem; color: #1b232b; font-variation-settings: "wdth" 125; }
@media (max-width: 760px) { .page-head .wrap { grid-template-columns: 1fr; } .page-head .brand-logo { width: 160px; height: 88px; order: -1; } }

.spec { display: grid; grid-template-columns: 340px 1fr; gap: 48px; padding: 56px 0; border-bottom: 1px solid var(--rule); scroll-margin-top: 80px; }
.spec:last-of-type { border-bottom: 0; }
.spec .shot { background: var(--tile); border: 1px solid var(--tile); border-radius: 10px; aspect-ratio: 1; display: flex; align-items: center; justify-content: center; overflow: hidden; position: sticky; top: 92px; }
.spec .shot img { width: 100%; height: 100%; object-fit: contain; }
.spec .cnote { margin: 10px 0 0; color: var(--steel); font-size: .9375rem; }
.feature { margin: 8px 0 64px; display: grid; gap: 10px; }
.feature img { border-radius: 10px; border: 1px solid var(--rule); max-height: 640px; width: auto; }
.feature figcaption, .photo figcaption { color: var(--steel); font-size: .875rem; }
.side { display: grid; gap: 24px; }
.photo { margin: 0; display: grid; gap: 8px; }
.photo img { border-radius: 10px; aspect-ratio: 4 / 3; object-fit: cover; width: 100%; }
.plate-logo { background: #fff; border-radius: 6px; padding: 12px 14px; display: block; }
.plate-logo img { width: 100%; height: auto; }
.spec h2 { margin: 0; font-size: var(--s4); font-weight: 800; font-variation-settings: "wdth" 115; line-height: 1.05; }
.spec .sub { margin: 6px 0 16px; font-size: var(--s1); color: var(--steel); font-weight: 600; }
.spec .intro { max-width: 62ch; margin: 0 0 24px; }
.spec h3 { font-size: var(--s0); margin: 28px 0 10px; }
.spec ul.ticks { margin: 0; padding: 0; list-style: none; display: grid; grid-template-columns: 1fr 1fr; gap: 6px 24px; }
.spec ul.ticks li { padding-left: 22px; position: relative; }
.spec ul.ticks li::before { content: ""; position: absolute; left: 0; top: .62em; width: 12px; height: 4px; border-radius: 2px; background: var(--bronze); }
.spec table { width: 100%; border-collapse: collapse; font-size: .9375rem; }
.spec th, .spec td { text-align: left; padding: 10px 12px 10px 0; border-bottom: 1px solid var(--rule); vertical-align: top; }
.spec th { width: 34%; color: var(--steel); font-weight: 600; }
.spec .caution { margin-top: 20px; padding: 14px 16px; border-left: 3px solid var(--bronze); background: var(--paper); font-size: .9375rem; color: var(--steel); }
.spec .docs { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 24px; }
.doc-link { display: inline-flex; align-items: center; gap: 8px; text-decoration: none; font-weight: 700; font-size: .9375rem; padding: 10px 14px; border: 1px solid var(--rule); border-radius: 8px; background: var(--paper); }
.doc-link:hover { border-color: var(--bronze); }
.doc-link svg { width: 18px; height: 18px; color: var(--bronze); }
@media (max-width: 860px) { .spec { grid-template-columns: 1fr; gap: 24px; padding: 40px 0; } .spec .shot { position: static; max-width: 320px; } .spec ul.ticks { grid-template-columns: 1fr; } }

.subnav { display: flex; gap: 8px; flex-wrap: wrap; padding: 20px 0; border-bottom: 1px solid var(--rule); }
.subnav a { text-decoration: none; font-weight: 700; padding: 6px 14px; border-radius: 999px; border: 1px solid var(--rule); background: var(--paper); font-size: .9375rem; }
.subnav a:hover { border-color: var(--bronze); }

/* ---------- downloads ---------- */
.dl-table { width: 100%; border-collapse: collapse; background: var(--paper); border-radius: 10px; overflow: hidden; }
.dl-table th, .dl-table td { text-align: left; padding: 14px 16px; border-bottom: 1px solid var(--rule); }
.dl-table thead th { background: var(--ink); color: var(--paper); font-size: .875rem; }
.dl-table td:last-child { white-space: nowrap; }
.dl-table a { font-weight: 700; text-underline-offset: 4px; text-decoration-color: var(--bronze); }
.dl-group { margin: 40px 0 12px; font-size: var(--s2); }
@media (max-width: 640px) {
  .dl-table thead { display: none; }
  .dl-table tr { display: block; border-bottom: 1px solid var(--rule); padding: 10px 0; }
  .dl-table td { display: block; border: 0; padding: 4px 16px; }
}

/* ---------- contact ---------- */
.contact { display: grid; grid-template-columns: .9fr 1.1fr; gap: 56px; }
.contact dl { margin: 0; display: grid; grid-template-columns: 110px 1fr; gap: 0; }
.contact dt, .contact dd { padding: 14px 0; border-top: 1px solid var(--rule); margin: 0; }
.contact dt { color: var(--steel); font-weight: 600; }
.contact dd a { font-weight: 700; text-underline-offset: 4px; text-decoration-color: var(--bronze); }
.form { background: var(--paper); border: 1px solid var(--rule); border-radius: 10px; padding: 28px; display: grid; gap: 16px; }
.form .form-title { margin: 0; font-size: var(--s2); }
.form .row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.form label { display: grid; gap: 6px; font-weight: 600; font-size: .9375rem; }
.form input, .form select, .form textarea {
  font: 400 1rem var(--font); color: var(--ink); background: var(--alu);
  border: 1px solid var(--rule); border-radius: 6px; padding: 12px; width: 100%;
}
.form textarea { min-height: 120px; resize: vertical; }
.form input:focus, .form select:focus, .form textarea:focus { outline: 2px solid var(--bronze); outline-offset: 0; border-color: var(--bronze); }
.form .note { color: var(--steel); font-size: .875rem; margin: 0; }
@media (max-width: 860px) { .contact { grid-template-columns: 1fr; gap: 32px; } .form .row { grid-template-columns: 1fr; } }

/* ---------- footer ---------- */
.site-footer { background: var(--ink); color: color-mix(in srgb, var(--paper) 82%, transparent); padding: 56px 0 32px; margin-top: 0; }
:root[data-theme="dark"] .site-footer { background: #0e1216; }
@media (prefers-color-scheme: dark) { :root:not([data-theme="light"]) .site-footer { background: #0e1216; } }
.site-footer .cols { display: grid; grid-template-columns: 1.4fr 1fr 1fr 1fr; gap: 32px; }
.site-footer .f-title { color: var(--paper); margin: 0 0 12px; font-size: var(--s0); font-weight: 700; }
:root[data-theme="dark"] .site-footer .f-title { color: #e8ebf5; }
.site-footer ul { list-style: none; margin: 0; padding: 0; display: grid; gap: 6px; }
.site-footer a { text-decoration: none; }
.site-footer a:hover { text-decoration: underline; }
.site-footer .legal { margin-top: 40px; padding-top: 20px; border-top: 1px solid rgba(255,255,255,.15); font-size: .875rem; display: flex; gap: 16px; flex-wrap: wrap; justify-content: space-between; }
@media (max-width: 860px) { .site-footer .cols { grid-template-columns: 1fr 1fr; } }
@media (max-width: 520px) { .site-footer .cols { grid-template-columns: 1fr; } }

/* floating WhatsApp */
.wa-float { position: fixed; right: 18px; bottom: 18px; z-index: 30; width: 56px; height: 56px; border-radius: 50%; background: var(--wa); color: #fff;
            display: flex; align-items: center; justify-content: center; box-shadow: 0 6px 18px rgba(0,0,0,.25); }
.wa-float svg { width: 28px; height: 28px; }

.tbc { background: #fff3c4; color: #5c4400; padding: 0 4px; border-radius: 3px; }

/* ---------- Traditional Chinese readability ----------
   CJK glyphs are dense, so Chinese gets a larger size, looser leading,
   a touch of tracking, no heavy 900 weights and no width axis. */
html[lang="zh-HK"] body { font-size: 1.0625rem; line-height: 1.85; letter-spacing: .03em; font-weight: 400; }
html[lang="zh-HK"] h1, html[lang="zh-HK"] h2, html[lang="zh-HK"] h3, html[lang="zh-HK"] h4,
html[lang="zh-HK"] .hero h1, html[lang="zh-HK"] .page-head h1 { font-weight: 700; letter-spacing: .04em; font-variation-settings: normal; }
html[lang="zh-HK"] .hero h1 { line-height: 1.3; font-size: clamp(2rem, 4.6vw, 3.5rem); }
html[lang="zh-HK"] .section-head h2, html[lang="zh-HK"] h2.h { line-height: 1.35; }
html[lang="zh-HK"] .hero p.lede, html[lang="zh-HK"] .page-head p { font-size: 1.125rem; line-height: 1.9; }
html[lang="zh-HK"] .product p, html[lang="zh-HK"] .job p, html[lang="zh-HK"] .role span,
html[lang="zh-HK"] .spec table, html[lang="zh-HK"] .caution, html[lang="zh-HK"] .cnote { font-size: 1rem; line-height: 1.8; }
html[lang="zh-HK"] .chips-label, html[lang="zh-HK"] .brand-tag, html[lang="zh-HK"] .feature figcaption,
html[lang="zh-HK"] .photo figcaption, html[lang="zh-HK"] .form .note { font-size: .9375rem !important; }
html[lang="zh-HK"] .nav a { font-weight: 500; }
html[lang="zh-HK"] .btn { font-weight: 700; letter-spacing: .06em; }
html[lang="zh-HK"] .product h3 small, html[lang="zh-HK"] .spec .sub { font-weight: 500; }


/* ---------- phones ---------- */
@media (max-width: 600px) {
  body { font-size: 1rem; }
  html[lang="zh-HK"] body { font-size: 1.0625rem; }
  html[lang="zh-HK"] .hero h1 { font-size: 2rem; }
  .hero h1 { font-size: 2.25rem; }
  .hero .wrap { gap: 28px; }
  .hero .actions { display: grid; grid-template-columns: 1fr; }
  .hero .actions .btn { justify-content: center; min-height: 52px; }
  .hero figure, .hero-media { max-width: 340px; margin: 0 auto; }
  .brand img { height: 44px; }
  .brand-word { display: none; }
  .site-header .wrap { gap: 10px; min-height: 64px; }
  .nav { top: 64px; }
  .nav a { min-height: 48px; display: flex; align-items: center; font-size: 1.0625rem; }
  .lang-toggle, .menu-btn { min-height: 40px; min-width: 44px; }
  section.block { padding: 48px 0; }
  .section-head h2, h2.h { font-size: 1.75rem; }
  .role { grid-template-columns: 76px 1fr; gap: 14px; }
  .role .logo { height: 52px; }
  .spec h2 { font-size: 2rem; }
  .spec table th { width: 40%; }
  .contact dl { grid-template-columns: 84px 1fr; }
  .form input, .form select, .form textarea { font-size: 16px; } /* stops iOS zooming into fields */
  .wa-float { right: max(14px, env(safe-area-inset-right, 0px)); bottom: max(14px, env(safe-area-inset-bottom, 0px)); }
  .site-footer .legal { flex-direction: column; }
}

/* ---------- additions: structure for split-language build ---------- */
.product h3 a { text-decoration: none; }
.product h3 a:hover { text-decoration: underline; text-decoration-color: var(--bronze); }
.product .shot { display: flex; }
.proof .h { margin-bottom: 24px; }
.spec .meta { display: flex; gap: 10px 12px; align-items: center; flex-wrap: wrap; }
.spec-body { min-width: 0; }
.table-wrap { overflow-x: auto; }
.doc-link.ask { background: var(--ink); color: var(--paper); border-color: var(--ink); }
.doc-link.ask:hover { background: var(--bronze-ink); border-color: var(--bronze-ink); }
.wa-cta { margin-top: 24px; }
section.block.tight { padding-top: 24px; }
.narrow { max-width: 860px; }
.dl-table .size { color: var(--steel); font-size: .8125rem; margin-left: 6px; }
.form .req { color: var(--bronze-ink); }
.form [aria-invalid="true"] { border-color: #b3261e; outline: 2px solid #b3261e; outline-offset: 0; }
.form-error { margin: 0; padding: 10px 12px; border-radius: 6px; background: #fdecea; color: #8c1d18; font-weight: 600; }
.form-ok { margin: 0; padding: 10px 12px; border-radius: 6px; background: #e6f4ea; color: #145a32; font-weight: 600; }
.actions-404 { display: flex; gap: 12px; flex-wrap: wrap; margin-top: 24px; }

/* FAQ: native disclosure, works without JS */
.faq { border-top: 2px solid var(--ink); }
.faq details { border-bottom: 1px solid var(--rule); }
.faq summary { list-style: none; cursor: pointer; padding: 20px 44px 20px 0; position: relative; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary h2, .faq summary h3 { margin: 0; font-size: var(--s1); line-height: 1.45; }
.faq summary::after { content: ""; position: absolute; right: 8px; top: 50%; width: 14px; height: 14px; margin-top: -9px;
  border-right: 3px solid var(--bronze); border-bottom: 3px solid var(--bronze); transform: rotate(45deg); transition: transform .2s; }
.faq details[open] summary::after { transform: rotate(-135deg); margin-top: -2px; }
.faq summary:hover h2, .faq summary:hover h3 { color: var(--glass-deep); }
.faq .ans { padding: 0 0 20px; color: var(--ink); max-width: 68ch; }
.faq .ans p { margin: 0; }
.faq .ans a { font-weight: 700; text-decoration-color: var(--bronze); text-underline-offset: 4px; }
.faq-cta { margin-top: 32px; }
.faq-teaser .section-head a { font-weight: 700; text-decoration-color: var(--bronze); text-underline-offset: 5px; text-decoration-thickness: 2px; }

/* UAT fixes: tap targets and minimum text size on phones */
.job .picks a { min-height: 40px; display: inline-flex; align-items: center; padding: 6px 14px; }
.plate a { display: inline-block; padding: 8px 0; }
.badge { font-size: .875rem; }
.dl-table .size { font-size: .875rem; }

/* =====================================================================
   PREMIUM / KOREAN LAYER
   Ideas borrowed from Korean craft and Seoul retail design:
   – 창살 hanok window lattice (fitting: we seal windows) as the one motif
   – 명조 / 明體 serif headings, set with air, medium weight
   – a vermilion 도장 seal stamp for "韓國製造"
   – generous white space and hairline rules
   ===================================================================== */
:root {
  --serif: "Noto Serif TC", "Noto Serif CJK TC", "Noto Serif KR", "Songti TC", "PMingLiU", Georgia, serif;
  --serif-ko: "Noto Serif KR", "Noto Serif CJK KR", "Noto Serif TC", serif;
  --night: #131a44;          /* hero navy, deeper than the logo navy */
  --night-2: #1c2456;
  --seal: #c9471d;           /* 인주 seal-paste vermilion, near the logo orange */
  --paper-warm: #fbfbf9;
  --lattice: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='64' height='64'%3E%3Cg fill='none' stroke='%23ffffff' stroke-opacity='.05' stroke-width='1.4'%3E%3Cpath d='M0 .7H64M.7 0V64M16 16h32v32H16zM32 0v16M32 48v16M0 32h16M48 32h16'/%3E%3C/g%3E%3C/svg%3E");
  --lattice-ink: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='64' height='64'%3E%3Cg fill='none' stroke='%231e285d' stroke-opacity='.06' stroke-width='1.4'%3E%3Cpath d='M0 .7H64M.7 0V64M16 16h32v32H16zM32 0v16M32 48v16M0 32h16M48 32h16'/%3E%3C/g%3E%3C/svg%3E");
}
body { background: var(--paper-warm); }
@media (prefers-color-scheme: dark) { :root:not([data-theme="light"]) body { background: var(--alu); } }
:root[data-theme="dark"] body { background: var(--alu); }

/* serif headings, both languages */
h1, h2, .product h3, .spec h2, .faq summary h2, .faq summary h3, .plate .plate-title, .job h3, .topp-feature h4 {
  font-family: var(--serif); font-variation-settings: normal; letter-spacing: .01em;
}
.hero h1, .page-head h1, .section-head h2, h2.h { font-weight: 600; }
html[lang="zh-HK"] h1, html[lang="zh-HK"] h2, html[lang="zh-HK"] h3,
html[lang="zh-HK"] .hero h1, html[lang="zh-HK"] .page-head h1 { font-family: var(--serif); font-weight: 600; letter-spacing: .05em; }
html[lang="zh-HK"] .role strong, html[lang="zh-HK"] .brand-tag, html[lang="zh-HK"] .nav a { font-family: var(--font-zh); }
.product h3, .spec h2 { font-weight: 700; }

/* small Hangul word that opens each section heading */
.ko { display: block; font-family: var(--serif-ko); font-weight: 500; font-size: .9375rem; letter-spacing: .3em;
      color: var(--seal); margin-bottom: 14px; }
html[lang="zh-HK"] .ko { letter-spacing: .3em; }

/* more air */
section.block { padding: 112px 0; }
section.block + section.block { border-top: 1px solid var(--rule); }
.section-head { margin-bottom: 56px; }
@media (max-width: 860px) { section.block { padding: 64px 0; } .section-head { margin-bottom: 32px; } }

/* header: quieter, hairline */
.site-header { background: color-mix(in srgb, var(--paper-warm) 90%, transparent); }
@media (prefers-color-scheme: dark) { :root:not([data-theme="light"]) .site-header { background: color-mix(in srgb, var(--alu) 90%, transparent); } }
:root[data-theme="dark"] .site-header { background: color-mix(in srgb, var(--alu) 90%, transparent); }
.nav a[aria-current="page"] { box-shadow: inset 0 -2px 0 var(--seal); }

/* ---------- hero: night navy with lattice ---------- */
.hero { background: var(--night) var(--lattice); color: #fff; border-bottom: 0; position: relative; }
.hero::after { content: ""; position: absolute; inset: 0; pointer-events: none;
  background: radial-gradient(ellipse 60% 70% at 78% 45%, rgba(120,150,230,.16), transparent 70%); }
.hero .wrap { position: relative; z-index: 1; padding-top: 88px; padding-bottom: 96px; }
.hero h1 { color: #fff; }
.hero p.lede { color: rgba(255,255,255,.78); }
.hero .btn:not(.wa) { background: #fff; border-color: #fff; color: var(--night); }
.hero .btn:not(.wa):hover { background: #ffe4d3; border-color: #ffe4d3; }
.hero .joint .frame { fill: #2b3784; }
.hero .joint .frame-face { fill: #3c4aa0; }
.hero .joint .glass { fill: #c4d6ee; }
.hero .joint .lbl { fill: rgba(255,255,255,.72); }
.hero .joint .lbl-line { stroke: rgba(255,255,255,.5); }
.hero-media { position: relative; }
.seal { position: absolute; right: -6px; bottom: 34px; width: 74px; height: 74px; display: grid; place-items: center;
  background: var(--seal); color: #fff; font-family: var(--serif); font-weight: 700; font-size: 1.125rem; line-height: 1.15;
  letter-spacing: .12em; text-align: center; border-radius: 6px; transform: rotate(-5deg);
  box-shadow: inset 0 0 0 3px var(--seal), inset 0 0 0 5px rgba(255,255,255,.85), 0 6px 16px rgba(0,0,0,.25); }
.hangul { position: absolute; right: max(16px, calc((100vw - var(--max)) / 2 - 36px)); top: 92px; margin: 0;
  writing-mode: vertical-rl; font-family: var(--serif-ko); font-size: .875rem; letter-spacing: .5em; color: rgba(255,255,255,.42); z-index: 1; }
@media (max-width: 1320px) { .hangul { display: none; } }
@media (max-width: 600px) { .seal { width: 60px; height: 60px; font-size: .9375rem; right: 0; bottom: 24px; } .hero .wrap { padding-top: 48px; padding-bottom: 56px; } }

/* roles band: white, hairlines */
.roles { background: #fff; }
@media (prefers-color-scheme: dark) { :root:not([data-theme="light"]) .roles { background: var(--paper); } }
:root[data-theme="dark"] .roles { background: var(--paper); }
.role .logo { border-color: transparent; background: #fff; }

/* jobs and FAQ: lighter framing */
.jobs { background: #fff; border-color: var(--rule); border-radius: 4px; }
@media (prefers-color-scheme: dark) { :root:not([data-theme="light"]) .jobs { background: var(--paper); } }
:root[data-theme="dark"] .jobs { background: var(--paper); }
.job { padding: 32px; }
.job svg { color: var(--seal); }
.range3 { border-top-width: 1px; }
.faq { border-top-width: 1px; }
.product .shot, .spec .shot, .topp-feature .shot { border-radius: 4px; }
.badge { border-radius: 2px; letter-spacing: .02em; }
.btn { border-radius: 4px; }

/* plate becomes a night panel with lattice */
.plate { background: var(--night) var(--lattice); border-radius: 4px; }

/* page heads on inner pages pick up the lattice faintly */
.page-head { background: #fff var(--lattice-ink); }
@media (prefers-color-scheme: dark) { :root:not([data-theme="light"]) .page-head { background: var(--paper) var(--lattice); } }
:root[data-theme="dark"] .page-head { background: var(--paper) var(--lattice); }
.page-head .role-tag { color: var(--seal); border-bottom-color: var(--seal); }

/* footer: lattice band on top */
.site-footer { background: var(--night); padding-top: 0; }
.lattice-band { height: 40px; background: var(--night-2) var(--lattice); border-bottom: 1px solid rgba(255,255,255,.08); margin-bottom: 56px; }

/* =====================================================================
   READABILITY PASS: sans-serif headings again, legible animation labels
   ===================================================================== */
h1, h2, h3, .product h3, .spec h2, .faq summary h2, .faq summary h3, .plate .plate-title, .job h3, .topp-feature h4,
.ko, .seal, .hangul { font-family: var(--font); }
html[lang="zh-HK"] h1, html[lang="zh-HK"] h2, html[lang="zh-HK"] h3,
html[lang="zh-HK"] .hero h1, html[lang="zh-HK"] .page-head h1, html[lang="zh-HK"] .product h3, html[lang="zh-HK"] .spec h2,
html[lang="zh-HK"] .faq summary h2, html[lang="zh-HK"] .faq summary h3, html[lang="zh-HK"] .plate .plate-title,
html[lang="zh-HK"] .job h3, html[lang="zh-HK"] .ko, html[lang="zh-HK"] .seal { font-family: var(--font-zh); }
.hero h1, .page-head h1, .section-head h2, h2.h { font-weight: 700; letter-spacing: .01em; }
html[lang="zh-HK"] .hero h1, html[lang="zh-HK"] .page-head h1, html[lang="zh-HK"] .section-head h2, html[lang="zh-HK"] h2.h { font-weight: 700; letter-spacing: .03em; }
.ko { font-weight: 700; font-size: .875rem; letter-spacing: .18em; font-family: "Noto Sans KR", "Apple SD Gothic Neo", "Malgun Gothic", var(--font); }
.faq summary h2, .faq summary h3 { font-weight: 700; }
.job h3 { font-weight: 700; }

/* animation labels: large, high contrast, inside the drawing */
.hero .joint .lbl { font: 700 22px var(--font); letter-spacing: .02em; }
html[lang="zh-HK"] .hero .joint .lbl { font: 700 24px var(--font-zh); letter-spacing: .06em; }
.hero .joint .lbl-dark { fill: #131a44; }
.hero .joint .lbl-light { fill: #ffffff; }
.hero .joint .lbl-line-dark { stroke: #131a44; stroke-width: 2; fill: none; }
@media (max-width: 600px) {
  .hero .joint .lbl, html[lang="zh-HK"] .hero .joint .lbl { font-size: 36px; }
  .seal { top: 12px; bottom: auto; right: 8px; }
}

/* ===== 10x pass: studio photos, comparison table, phone action bar ===== */
.product .shot img, .spec .shot img { object-fit: cover; }
.product .shot { aspect-ratio: 4 / 3; }
.photo img { aspect-ratio: 16 / 10; }
.photo { background: var(--tile); border-radius: 4px; overflow: hidden; }
.photo figcaption { background: var(--paper-warm); padding-top: 8px; }
@media (prefers-color-scheme: dark) { :root:not([data-theme="light"]) .photo figcaption { background: var(--alu); } }
:root[data-theme="dark"] .photo figcaption { background: var(--alu); }

.compare { margin-top: 64px; }
.compare-title { margin: 0 0 18px; font-size: var(--s3); }
.compare table { width: 100%; min-width: 640px; border-collapse: collapse; background: #fff; font-size: .9375rem; }
@media (prefers-color-scheme: dark) { :root:not([data-theme="light"]) .compare table { background: var(--paper); } }
:root[data-theme="dark"] .compare table { background: var(--paper); }
.compare th, .compare td { text-align: left; vertical-align: top; padding: 14px 16px; border-bottom: 1px solid var(--rule); }
.compare thead th { background: var(--night); color: #fff; font-size: 1.0625rem; width: 27%; }
.compare thead td { background: var(--night); width: 19%; }
.compare thead th a { color: #fff; text-decoration: none; }
.compare thead th a:hover { text-decoration: underline; text-decoration-color: var(--bronze); }
.compare thead th small { display: block; font-weight: 500; font-size: .875rem; color: rgba(255,255,255,.7); letter-spacing: .08em; }
.compare tbody th { color: var(--steel); font-weight: 600; }
.compare tbody tr:nth-child(even) { background: color-mix(in srgb, var(--alu) 45%, transparent); }
html[lang="zh-HK"] .compare table { font-size: 1rem; }

.mbar { display: none; }
@media (max-width: 600px) {
  .mbar { display: grid; grid-template-columns: 1fr 1fr; position: fixed; left: 0; right: 0; bottom: 0; z-index: 40;
    background: var(--night); padding: 8px max(10px, env(safe-area-inset-right, 0px)) calc(8px + env(safe-area-inset-bottom, 0px)) max(10px, env(safe-area-inset-left, 0px));
    gap: 8px; box-shadow: 0 -4px 16px rgba(0,0,0,.18); }
  .mbar a { display: flex; align-items: center; justify-content: center; gap: 8px; min-height: 48px; border-radius: 4px; text-decoration: none;
    font-weight: 700; font-size: 1.0625rem; color: var(--night); background: #fff; }
  .mbar a.wa { background: var(--wa); color: #fff; }
  .mbar svg { width: 20px; height: 20px; }
  .wa-float { display: none; }
  body { padding-bottom: calc(68px + env(safe-area-inset-bottom, 0px)); }
}
/* product cards: keep colour dots and badges on one line across the row */
.range3 .product { display: flex; flex-direction: column; gap: 12px; }
.range3 .product > p:not(.brand-tag) { min-height: 3.7em; }
html[lang="en"] .range3 .product > p:not(.brand-tag) { min-height: 4.9em; }
.range3 .product .meta + .meta { min-height: 30px; }
.range3 .product .more { margin-top: auto; }
/* partners */
.partner-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }
.partner-grid .plate { align-content: start; padding: 36px; }
.partner-grid .plate > p:not(.plate-title) { margin: 0; color: rgba(255,255,255,.82); max-width: 60ch; }
.partner-grid .plate a { margin-top: auto; }
.wordmark-plate { display: flex !important; align-items: center; justify-content: center; gap: 12px; min-height: 74px;
  color: #1e285d; font-weight: 800; font-size: 1.75rem; letter-spacing: .04em; font-family: var(--font-zh); }
.wordmark-plate b { color: #c9471d; font-size: 2rem; }
@media (max-width: 860px) { .partner-grid { grid-template-columns: 1fr; } .partner-grid .plate { padding: 28px 24px; } }
.partner-grid .plate-logo { min-height: 74px; display: flex; align-items: center; justify-content: center; }
.partner-grid .plate-logo img { max-height: 56px; width: auto; max-width: 100%; }