/*
Theme Name: Linghui
Theme URI: https://example.com/
Author: Linghui
Description: A monochrome export catalog theme for Linghui International Trading Co., Ltd.
Version: 0.4.5
Requires at least: 7.0
Requires PHP: 8.3
Text Domain: linghui
*/

:root {
  color-scheme: light;
  --lh-ink: #111111;
  --lh-charcoal: #242424;
  --lh-slate: #656565;
  --lh-line: #d9d9d7;
  --lh-soft-line: #e9e9e6;
  --lh-paper: #f3f3f0;
  --lh-warm-white: #fafaf8;
  --lh-white: #ffffff;
  --lh-max: 1440px;
  --lh-pad: clamp(1.25rem, 4vw, 4.5rem);
  --lh-serif: Georgia, 'Times New Roman', serif;
  --lh-sans: Inter, -apple-system, BlinkMacSystemFont, 'Segoe UI', Arial, sans-serif;
  --lh-cjk: 'Songti SC', 'Noto Serif CJK SC', 'Source Han Serif SC', serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  overflow-x: hidden;
  background: var(--lh-white);
  color: var(--lh-ink);
  font-family: var(--lh-sans);
  font-size: 16px;
  line-height: 1.6;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}
body.menu-open { overflow: hidden; }
img { display: block; max-width: 100%; }
a { color: inherit; text-underline-offset: 0.2em; }
button, input, select, textarea { border-radius: 0; font: inherit; }
button, select { cursor: pointer; }
.lh-copy-zh { display: none; }
body.lh-lang-zh .lh-copy-en { display: none; }
body.lh-lang-zh .lh-copy-zh { display: initial; }
body.lh-lang-zh .lh-hero h1,
body.lh-lang-zh .lh-section-title,
body.lh-lang-zh .lh-material-card h3,
body.lh-lang-zh .lh-value-strip h2,
body.lh-lang-zh .lh-value-item h3,
body.lh-lang-zh .lh-product-detail h1,
body.lh-lang-zh .lh-product-inquiry h2 { font-family: var(--lh-cjk); }

.lh-shell { width: min(100%, var(--lh-max)); margin-inline: auto; padding-inline: var(--lh-pad); }
.lh-kicker {
  margin: 0 0 1rem;
  color: var(--lh-slate);
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.18em;
  line-height: 1.2;
  text-transform: uppercase;
}
.lh-section-title {
  max-width: 760px;
  margin: 0;
  font-family: var(--lh-serif);
  font-size: clamp(2.35rem, 5vw, 5rem);
  font-weight: 400;
  letter-spacing: -0.045em;
  line-height: 0.98;
}
.lh-section-intro {
  max-width: 620px;
  margin: 1.4rem 0 0;
  color: var(--lh-slate);
  font-size: clamp(1rem, 1.5vw, 1.18rem);
}
.lh-button {
  display: inline-flex;
  min-height: 48px;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--lh-ink);
  padding: 0.75rem 1.35rem;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.11em;
  line-height: 1.2;
  text-decoration: none;
  text-transform: uppercase;
  transition: background-color 180ms ease, color 180ms ease;
}
.lh-button--dark { background: var(--lh-ink); color: var(--lh-white); }
.lh-button--dark:hover, .lh-button--dark:focus-visible { background: var(--lh-white); color: var(--lh-ink); }
.lh-button--light { border-color: var(--lh-white); background: var(--lh-white); color: var(--lh-ink); }
.lh-button--light:hover, .lh-button--light:focus-visible { background: transparent; color: var(--lh-white); }
.lh-text-link {
  display: inline-block;
  border-bottom: 1px solid currentColor;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  line-height: 1.7;
  text-decoration: none;
  text-transform: uppercase;
}
.lh-skip-link {
  position: fixed;
  z-index: 1000;
  top: 0.75rem;
  left: 0.75rem;
  transform: translateY(-180%);
  background: var(--lh-white);
  color: var(--lh-ink);
  padding: 0.65rem 1rem;
}
.lh-skip-link:focus { transform: none; }

/* Header */
.lh-site-header { position: relative; z-index: 50; border-bottom: 1px solid var(--lh-line); background: rgba(255, 255, 255, 0.98); }
.lh-utility { background: var(--lh-ink); color: var(--lh-white); font-size: 0.68rem; letter-spacing: 0.11em; text-transform: uppercase; }
.lh-utility__inner { display: flex; min-height: 34px; align-items: center; justify-content: space-between; gap: 1rem; }
.lh-utility p { margin: 0; }
.lh-utility__languages { display: flex; gap: 1rem; white-space: nowrap; }
.lh-utility__languages a { color: rgba(255,255,255,0.62); text-decoration: none; }
body.lh-lang-en .lh-utility__languages [data-lh-language="en"],
body.lh-lang-zh .lh-utility__languages [data-lh-language="zh"] { color: var(--lh-white); text-decoration: underline; text-underline-offset: 0.25em; }
.lh-primary-header {
  display: grid;
  min-height: 86px;
  align-items: center;
  grid-template-columns: minmax(180px, 1fr) auto minmax(180px, 1fr);
  gap: 2rem;
}
.lh-brand { display: inline-flex; flex-direction: column; justify-self: start; text-decoration: none; }
.lh-brand__name { font-family: var(--lh-serif); font-size: 1.6rem; letter-spacing: 0.2em; line-height: 1; }
.lh-brand__descriptor { margin-top: 0.42rem; color: var(--lh-slate); font-size: 0.54rem; font-weight: 700; letter-spacing: 0.2em; line-height: 1; }
.lh-nav { display: flex; align-items: center; justify-content: center; gap: clamp(1.15rem, 2.3vw, 2.7rem); }
.lh-nav a { position: relative; padding-block: 0.6rem; font-size: 0.68rem; font-weight: 700; letter-spacing: 0.1em; text-decoration: none; text-transform: uppercase; }
.lh-nav a::after {
  position: absolute;
  right: 0;
  bottom: 0.2rem;
  left: 0;
  height: 1px;
  background: currentColor;
  content: '';
  transform: scaleX(0);
  transform-origin: right;
  transition: transform 180ms ease;
}
.lh-nav a:hover::after, .lh-nav a:focus-visible::after { transform: scaleX(1); transform-origin: left; }
.lh-header-actions { display: flex; align-items: center; justify-self: end; }
.lh-menu-toggle { display: none; width: 44px; height: 44px; align-items: center; justify-content: center; border: 0; background: transparent; }
.lh-menu-toggle span, .lh-menu-toggle span::before, .lh-menu-toggle span::after { display: block; width: 22px; height: 1px; background: var(--lh-ink); content: ''; transition: transform 180ms ease; }
.lh-menu-toggle span { position: relative; }
.lh-menu-toggle span::before { position: absolute; top: -6px; }
.lh-menu-toggle span::after { position: absolute; top: 6px; }
.menu-open .lh-menu-toggle span { background: transparent; }
.menu-open .lh-menu-toggle span::before { top: 0; transform: rotate(45deg); }
.menu-open .lh-menu-toggle span::after { top: 0; transform: rotate(-45deg); }

/* Home hero */
.lh-hero {
  position: relative;
  display: flex;
  min-height: min(760px, calc(100svh - 120px));
  align-items: center;
  overflow: hidden;
  background-color: #1a2022;
  background-image: linear-gradient(90deg, rgba(7, 11, 12, 0.88) 0%, rgba(8, 12, 13, 0.62) 38%, rgba(8, 12, 13, 0.08) 72%), url('assets/images/linghui-titanium-hero-v1.png');
  background-position: center;
  background-size: cover;
  color: var(--lh-white);
}
.lh-hero__content { position: relative; z-index: 1; max-width: 760px; padding-block: clamp(5rem, 10vw, 10rem); }
.lh-hero .lh-kicker { color: rgba(255, 255, 255, 0.76); }
.lh-hero h1 {
  max-width: 700px;
  margin: 0;
  font-family: var(--lh-serif);
  font-size: clamp(3.6rem, 9.5vw, 9rem);
  font-weight: 400;
  letter-spacing: -0.06em;
  line-height: 0.82;
  text-transform: uppercase;
}
body.lh-lang-zh .lh-hero h1 { font-size: clamp(4.8rem, 9vw, 8.5rem); letter-spacing: -0.08em; line-height: 0.92; text-transform: none; }
.lh-hero__lead { max-width: 525px; margin: 2rem 0 0; color: rgba(255, 255, 255, 0.82); font-size: clamp(1rem, 1.5vw, 1.2rem); }
.lh-hero__actions { display: flex; flex-wrap: wrap; gap: 0.8rem; margin-top: 2rem; }
.lh-hero__note { position: absolute; z-index: 1; right: var(--lh-pad); bottom: 2rem; margin: 0; color: rgba(255, 255, 255, 0.74); font-size: 0.62rem; letter-spacing: 0.14em; text-transform: uppercase; }

/* Material pathways */
.lh-materials { padding-block: clamp(5rem, 9vw, 9rem); background: var(--lh-warm-white); }
.lh-materials__header { display: grid; align-items: end; grid-template-columns: minmax(0, 1fr) minmax(260px, 0.58fr); gap: clamp(2rem, 7vw, 8rem); margin-bottom: clamp(3rem, 5vw, 5rem); }
.lh-materials__header .lh-section-intro { margin: 0; }
.lh-material-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 1px; background: var(--lh-line); border: 1px solid var(--lh-line); }
.lh-material-card { position: relative; min-height: 480px; overflow: hidden; background: var(--lh-paper); text-decoration: none; }
.lh-material-card::before { position: absolute; inset: 0; background: linear-gradient(180deg, rgba(0,0,0,0) 35%, rgba(0,0,0,0.8) 100%); content: ''; z-index: 1; }
.lh-material-card img { width: 100%; height: 100%; object-fit: cover; transition: transform 650ms cubic-bezier(0.2, 0.7, 0.2, 1); }
.lh-material-card:hover img { transform: scale(1.035); }
.lh-material-card__body { position: absolute; z-index: 2; right: 0; bottom: 0; left: 0; display: flex; align-items: end; justify-content: space-between; gap: 2rem; padding: clamp(1.5rem, 4vw, 3rem); color: var(--lh-white); }
.lh-material-card h3 { margin: 0; font-family: var(--lh-serif); font-size: clamp(2.1rem, 4vw, 4rem); font-weight: 400; letter-spacing: -0.04em; line-height: 1; }
.lh-material-card p { max-width: 300px; margin: 0.8rem 0 0; color: rgba(255,255,255,0.75); font-size: 0.88rem; }
.lh-material-card__arrow { flex: 0 0 auto; font-family: var(--lh-serif); font-size: 2.5rem; line-height: 1; }

/* Catalog */
.lh-catalog-section, .lh-archive-hero, .lh-product-page { background: var(--lh-white); }
.lh-catalog-section { padding-block: clamp(5rem, 9vw, 9rem); }
.lh-archive-hero { padding-block: clamp(4rem, 8vw, 8rem); border-bottom: 1px solid var(--lh-line); }
.lh-archive-hero .lh-section-title { font-size: clamp(3.2rem, 7vw, 7.2rem); }
.lh-catalog { display: grid; width: min(100%, var(--lh-max)); margin-inline: auto; padding-inline: var(--lh-pad); grid-template-columns: minmax(190px, 240px) minmax(0, 1fr); gap: clamp(2.5rem, 5vw, 6rem); }
.lh-catalog-section > .lh-shell > .lh-catalog { padding-inline: 0; }
.lh-catalog__filters { position: relative; }
.lh-filter-heading { display: flex; align-items: center; justify-content: space-between; border-bottom: 1px solid var(--lh-ink); padding-bottom: 0.85rem; }
.lh-filter-heading p { margin: 0; font-size: 0.72rem; font-weight: 700; letter-spacing: 0.13em; text-transform: uppercase; }
.lh-filter-toggle { display: none; border: 0; background: transparent; font-size: 0.72rem; font-weight: 700; text-decoration: underline; }
.lh-filter-form { display: grid; gap: 0; padding-top: 1.2rem; }
.lh-filter-field { display: grid; gap: 0.38rem; }
.lh-filter-field span, .lh-form-grid label > span { color: var(--lh-slate); font-size: 0.69rem; font-weight: 700; letter-spacing: 0.09em; text-transform: uppercase; }
.lh-filter-field input, .lh-filter-field select, .lh-form-grid input, .lh-form-grid textarea { width: 100%; border: 1px solid var(--lh-line); background: var(--lh-white); color: var(--lh-ink); outline: none; }
.lh-filter-field input, .lh-filter-field select, .lh-form-grid input { min-height: 48px; padding: 0 0.8rem; }
.lh-filter-field input:focus, .lh-filter-field select:focus, .lh-form-grid input:focus, .lh-form-grid textarea:focus { border-color: var(--lh-ink); box-shadow: 0 0 0 1px var(--lh-ink); }
.lh-filter-search { padding-bottom: 0.9rem; }
.lh-filter-search input { min-height: 40px; }
.lh-filter-group { min-width: 0; margin: 0; padding: 1.25rem 0; border: 0; border-top: 1px solid var(--lh-line); }
.lh-filter-group legend, .lh-active-filters > p { width: 100%; margin: 0 0 1.1rem; padding: 0; color: var(--lh-ink); font-size: 0.68rem; font-weight: 700; letter-spacing: 0.12em; text-transform: uppercase; }
.lh-filter-group--materials { padding: 0.9rem 0; }
.lh-filter-group--materials legend { margin-bottom: 0.7rem; }
.lh-material-option, .lh-filter-chips label, .lh-category-option { position: relative; cursor: pointer; }
.lh-material-option input, .lh-filter-chips input, .lh-category-option input { position: absolute; width: 1px; height: 1px; opacity: 0; pointer-events: none; }
.lh-material-options { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 0.45rem; }
.lh-material-option > span { display: flex; min-height: 42px; box-sizing: border-box; align-items: center; justify-content: space-between; gap: 0.4rem; padding: 0.5rem 0.6rem; border: 1px solid var(--lh-line); background: var(--lh-white); transition: border-color 150ms ease, background-color 150ms ease, color 150ms ease; }
.lh-material-option strong { font-size: 0.78rem; font-weight: 600; line-height: 1.25; }
.lh-material-option small { color: #969696; font-size: 0.64rem; font-variant-numeric: tabular-nums; }
.lh-material-option:hover > span { border-color: var(--lh-ink); }
.lh-material-option input:checked + span { border-color: var(--lh-ink); background: var(--lh-ink); color: var(--lh-white); }
.lh-material-option input:checked + span small { color: rgba(255,255,255,0.68); }
.lh-material-option input:focus-visible + span, .lh-filter-chips input:focus-visible + span, .lh-category-option input:focus-visible + span { outline: 2px solid var(--lh-ink); outline-offset: 3px; }
.lh-filter-select-group { padding: 0.9rem 0; border-top: 1px solid var(--lh-line); }
.lh-filter-select-group .lh-filter-field > span { margin-bottom: 0.25rem; color: var(--lh-ink); letter-spacing: 0.12em; }
.lh-filter-select-group select { min-height: 40px; }
.lh-filter-disclosure { border-top: 1px solid var(--lh-line); }
.lh-filter-disclosure summary { display: grid; min-height: 44px; align-items: center; grid-template-columns: auto minmax(0, 1fr) auto; gap: 0.7rem; cursor: pointer; list-style: none; }
.lh-filter-disclosure summary::-webkit-details-marker { display: none; }
.lh-filter-disclosure summary::after { color: var(--lh-slate); content: '+'; font-size: 1rem; font-weight: 400; }
.lh-filter-disclosure[open] summary::after { content: '−'; }
.lh-filter-disclosure summary strong { font-size: 0.68rem; letter-spacing: 0.12em; text-transform: uppercase; }
.lh-filter-disclosure summary span { overflow: hidden; color: var(--lh-slate); font-size: 0.7rem; text-align: right; text-overflow: ellipsis; white-space: nowrap; }
.lh-filter-disclosure[open] summary { margin-bottom: 0.85rem; }
.lh-filter-disclosure .lh-filter-group { padding: 0 0 1.2rem; border-top: 0; }
.lh-filter-disclosure .lh-filter-group legend.screen-reader-text { position: absolute; width: 1px; height: 1px; margin: -1px; padding: 0; overflow: hidden; clip: rect(0, 0, 0, 0); border: 0; white-space: nowrap; }
.lh-filter-chips { display: flex; gap: 0.45rem; flex-wrap: wrap; }
.lh-filter-chips label > span { display: inline-flex; min-height: 36px; box-sizing: border-box; align-items: center; gap: 0.45rem; padding: 0.5rem 0.68rem; border: 1px solid var(--lh-line); background: var(--lh-white); font-size: 0.76rem; line-height: 1.1; transition: border-color 150ms ease, background-color 150ms ease, color 150ms ease; }
.lh-filter-chips label:hover > span { border-color: var(--lh-ink); }
.lh-filter-chips small { color: #969696; font-size: 0.58rem; font-variant-numeric: tabular-nums; }
.lh-filter-chips input:checked + span { border-color: var(--lh-ink); background: var(--lh-ink); color: var(--lh-white); }
.lh-filter-chips input:checked + span small { color: rgba(255,255,255,0.68); }
.lh-category-options { border-top: 1px solid var(--lh-soft-line); }
.lh-category-option { display: block; }
.lh-category-option > span { display: flex; min-height: 42px; align-items: center; justify-content: space-between; gap: 1rem; border-bottom: 1px solid var(--lh-soft-line); color: var(--lh-charcoal); transition: color 150ms ease, padding 150ms ease; }
.lh-category-option strong { font-size: 0.82rem; font-weight: 400; line-height: 1.3; }
.lh-category-option small { color: #969696; font-size: 0.64rem; font-variant-numeric: tabular-nums; }
.lh-category-option:hover > span { padding-left: 0.3rem; color: var(--lh-ink); }
.lh-category-option input:checked + span { color: var(--lh-ink); }
.lh-category-option input:checked + span strong { font-weight: 700; }
.lh-category-option input:checked + span::before { width: 3px; align-self: stretch; background: var(--lh-ink); content: ''; }
.lh-category-option input:checked + span strong { margin-right: auto; }
.lh-active-filters { padding-bottom: 1.7rem; }
.lh-active-filters__list { display: flex; gap: 0.45rem; flex-wrap: wrap; }
.lh-active-filters__list a { display: inline-flex; min-height: 38px; align-items: center; gap: 0.65rem; padding: 0.55rem 0.7rem; border: 1px solid var(--lh-ink); font-size: 0.75rem; line-height: 1.2; text-decoration: none; }
.lh-active-filters__list a span { color: var(--lh-slate); font-size: 1rem; line-height: 1; }
.lh-filter-form > .lh-button { width: 100%; margin-top: 0.25rem; }
.lh-filter-reset { justify-self: start; margin-top: 0.75rem; color: var(--lh-slate); font-size: 0.72rem; font-weight: 700; letter-spacing: 0.08em; text-transform: uppercase; }
.lh-catalog__heading { display: flex; align-items: end; justify-content: space-between; gap: 2rem; margin-bottom: 2rem; padding-bottom: 1.25rem; border-bottom: 1px solid var(--lh-ink); }
.lh-catalog__heading .lh-kicker { margin-bottom: 0.55rem; }
.lh-catalog__heading h2 { margin: 0; font-family: var(--lh-serif); font-size: clamp(2.1rem, 4vw, 4rem); font-weight: 400; letter-spacing: -0.04em; line-height: 1; }
.lh-catalog__heading > p { margin: 0; color: var(--lh-slate); font-size: 0.72rem; letter-spacing: 0.08em; text-transform: uppercase; white-space: nowrap; }
.lh-product-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: clamp(2rem, 4vw, 4rem) clamp(1rem, 2vw, 2rem); }
.lh-product-card { min-width: 0; }
.lh-product-card__image { display: block; overflow: hidden; aspect-ratio: 4 / 5; background: var(--lh-paper); }
.lh-product-card__image img { width: 100%; height: 100%; padding: 8%; object-fit: contain; mix-blend-mode: multiply; transition: transform 450ms cubic-bezier(0.2, 0.7, 0.2, 1); }
.lh-product-card:hover .lh-product-card__image img { transform: scale(1.035); }
.lh-product-card__body { padding-top: 1.2rem; }
.lh-product-card__eyebrow { margin: 0 0 0.35rem; color: var(--lh-slate); font-size: 0.65rem; font-weight: 700; letter-spacing: 0.12em; text-transform: uppercase; }
.lh-product-card h3 { margin: 0; font-family: var(--lh-serif); font-size: clamp(1.25rem, 1.8vw, 1.65rem); font-weight: 400; letter-spacing: -0.025em; line-height: 1.15; }
.lh-product-card h3 a { text-decoration: none; }
.lh-product-card__meta { min-height: 1.6em; margin: 0.7rem 0 1rem; color: var(--lh-slate); font-size: 0.76rem; }
.lh-pagination { margin-top: 4rem; }
.lh-pagination ul { display: flex; flex-wrap: wrap; margin: 0; padding: 0; gap: 0.4rem; list-style: none; }
.lh-pagination a, .lh-pagination span { display: grid; width: 42px; min-width: 42px; height: 42px; box-sizing: border-box; place-items: center; border: 1px solid var(--lh-line); font-size: 0.8rem; line-height: 1; text-decoration: none; white-space: nowrap; }
.lh-pagination .prev, .lh-pagination .next { width: auto; padding-inline: 0.95rem; }
.lh-pagination .current { border-color: var(--lh-ink); background: var(--lh-ink); color: var(--lh-white); }
.lh-empty-state { padding: 4rem; background: var(--lh-paper); text-align: center; }

@media (min-width: 821px) {
  .lh-catalog__filters {
    position: sticky;
    top: 1.5rem;
    align-self: start;
    max-height: calc(100vh - 3rem);
    padding-bottom: 0.25rem;
    overflow-y: auto;
    overscroll-behavior: contain;
    scrollbar-width: thin;
  }

  body.admin-bar .lh-catalog__filters {
    top: calc(1.5rem + 32px);
    max-height: calc(100vh - 3rem - 32px);
  }
}

/* About teaser and page */
.lh-about-teaser { padding-block: clamp(5rem, 9vw, 9rem); background: var(--lh-paper); }
.lh-about-teaser__grid { display: grid; grid-template-columns: minmax(260px, 0.85fr) minmax(0, 1.15fr); gap: clamp(3rem, 8vw, 9rem); align-items: start; }
.lh-about-teaser h2 { max-width: 700px; margin: 0; font-family: var(--lh-serif); font-size: clamp(3.2rem, 6vw, 6.8rem); font-weight: 400; letter-spacing: -0.055em; line-height: 0.92; }
body.lh-lang-zh .lh-about-teaser h2 { font-family: var(--lh-cjk); font-size: clamp(3.6rem, 6vw, 6.5rem); line-height: 1.02; }
.lh-about-teaser__content { max-width: 700px; padding-top: 1.8rem; }
.lh-about-teaser__content > p { margin: 0; color: var(--lh-charcoal); font-size: clamp(1rem, 1.35vw, 1.18rem); line-height: 1.85; }
.lh-about-teaser__facts { display: grid; margin-block: 2.3rem; border-block: 1px solid var(--lh-line); grid-template-columns: repeat(3, minmax(0, 1fr)); }
.lh-about-teaser__facts > span { display: grid; min-height: 110px; align-content: center; gap: 0.5rem; padding: 1rem; border-right: 1px solid var(--lh-line); }
.lh-about-teaser__facts > span:first-child { padding-left: 0; }
.lh-about-teaser__facts > span:last-child { border-right: 0; }
.lh-about-teaser__facts strong { font-family: var(--lh-serif); font-size: 1.25rem; font-weight: 400; }
.lh-about-teaser__facts small { color: var(--lh-slate); font-size: 0.68rem; letter-spacing: 0.08em; text-transform: uppercase; }

.lh-about-page { background: var(--lh-white); }
.lh-about-hero { min-height: min(760px, 82vh); display: flex; align-items: end; padding-block: clamp(5rem, 10vw, 10rem); background: var(--lh-ink); color: var(--lh-white); }
.lh-about-hero__inner { display: grid; grid-template-columns: minmax(0, 1.35fr) minmax(260px, 0.65fr); gap: clamp(3rem, 9vw, 10rem); align-items: end; }
.lh-about-hero .lh-kicker { color: rgba(255,255,255,0.58); }
.lh-about-hero h1 { margin: 0; font-family: var(--lh-serif); font-size: clamp(4.2rem, 9vw, 10rem); font-weight: 400; letter-spacing: -0.065em; line-height: 0.82; }
body.lh-lang-zh .lh-about-hero h1 { font-family: var(--lh-cjk); font-size: clamp(4rem, 7.4vw, 7.5rem); letter-spacing: -0.04em; line-height: 1.02; }
.lh-about-hero__aside { padding-left: clamp(1.5rem, 3vw, 3rem); border-left: 1px solid rgba(255,255,255,0.25); }
.lh-about-hero__aside p { margin: 0 0 2.5rem; color: rgba(255,255,255,0.76); font-size: clamp(1rem, 1.4vw, 1.2rem); line-height: 1.75; }
.lh-about-hero__aside > span { font-size: 0.68rem; font-weight: 700; letter-spacing: 0.13em; text-transform: uppercase; }

.lh-about-story, .lh-about-offer { padding-block: clamp(5rem, 10vw, 10rem); }
.lh-about-story__grid, .lh-about-offer__grid { display: grid; grid-template-columns: minmax(260px, 0.8fr) minmax(0, 1.2fr); gap: clamp(3rem, 9vw, 10rem); }
.lh-about-story h2, .lh-about-section-heading h2, .lh-about-offer h2, .lh-about-cta h2 { margin: 0; font-family: var(--lh-serif); font-size: clamp(3rem, 5.5vw, 6.3rem); font-weight: 400; letter-spacing: -0.055em; line-height: 0.94; }
body.lh-lang-zh .lh-about-story h2, body.lh-lang-zh .lh-about-section-heading h2, body.lh-lang-zh .lh-about-offer h2, body.lh-lang-zh .lh-about-cta h2 { font-family: var(--lh-cjk); font-size: clamp(2.8rem, 4.6vw, 5rem); letter-spacing: -0.035em; line-height: 1.12; }
body.lh-lang-zh .lh-about-page h1 .lh-copy-zh, body.lh-lang-zh .lh-about-page h2 .lh-copy-zh { display: inline-block; white-space: nowrap; }
body.lh-lang-zh .lh-about-hero__aside p, body.lh-lang-zh .lh-about-story__copy p, body.lh-lang-zh .lh-about-section-heading > p, body.lh-lang-zh .lh-about-offer__block p, body.lh-lang-zh .lh-about-cta__inner > div:last-child > p { line-height: 1.9; }
.lh-about-story__copy { padding-top: 2rem; }
.lh-about-story__copy p { margin: 0 0 1.5rem; color: var(--lh-charcoal); font-size: clamp(1.05rem, 1.5vw, 1.3rem); line-height: 1.9; }

.lh-about-process { padding-block: clamp(5rem, 9vw, 9rem); background: var(--lh-paper); }
.lh-about-section-heading { display: grid; grid-template-columns: minmax(0, 1.2fr) minmax(260px, 0.8fr); gap: clamp(3rem, 8vw, 9rem); align-items: end; padding-bottom: clamp(3rem, 6vw, 6rem); }
.lh-about-section-heading > p { max-width: 500px; margin: 0; color: var(--lh-slate); line-height: 1.8; }
.lh-about-process__grid { display: grid; border-top: 1px solid var(--lh-line); grid-template-columns: repeat(4, minmax(0, 1fr)); }
.lh-about-process__grid article { min-height: 300px; padding: 2rem 1.5rem 2rem 0; border-right: 1px solid var(--lh-line); }
.lh-about-process__grid article + article { padding-left: 1.5rem; }
.lh-about-process__grid article:last-child { border-right: 0; }
.lh-about-process__grid article > span { color: var(--lh-slate); font-size: 0.68rem; font-weight: 700; letter-spacing: 0.12em; }
.lh-about-process__grid h3 { margin: 7rem 0 0.8rem; font-family: var(--lh-serif); font-size: 1.55rem; font-weight: 400; }
.lh-about-process__grid p { margin: 0; color: var(--lh-slate); font-size: 0.88rem; line-height: 1.7; }
body.lh-lang-zh .lh-about-process__grid h3 { font-family: var(--lh-cjk); letter-spacing: -0.02em; line-height: 1.25; }
body.lh-lang-zh .lh-about-process__grid p { line-height: 1.85; }

.lh-about-offer__intro { position: sticky; top: 2rem; align-self: start; }
body.admin-bar .lh-about-offer__intro { top: calc(2rem + 32px); }
.lh-about-offer__content { border-top: 1px solid var(--lh-ink); }
.lh-about-offer__block { display: grid; grid-template-columns: minmax(150px, 0.4fr) minmax(0, 1fr); gap: 2rem; padding-block: 2.4rem; border-bottom: 1px solid var(--lh-line); }
.lh-about-offer__block h3 { margin: 0; font-size: 0.72rem; letter-spacing: 0.11em; text-transform: uppercase; }
.lh-about-offer__block p { margin: 0; color: var(--lh-charcoal); font-size: 1.05rem; line-height: 1.8; }

.lh-about-cta { padding-block: clamp(5rem, 9vw, 9rem); background: var(--lh-ink); color: var(--lh-white); }
.lh-about-cta__inner { display: grid; grid-template-columns: minmax(0, 1.15fr) minmax(260px, 0.85fr); gap: clamp(3rem, 9vw, 10rem); align-items: end; }
.lh-about-cta .lh-kicker { color: rgba(255,255,255,0.55); }
.lh-about-cta__inner > div:last-child > p { margin: 0 0 2rem; color: rgba(255,255,255,0.72); font-size: 1.05rem; line-height: 1.8; }
.lh-about-cta__actions { display: flex; align-items: center; gap: 1.5rem; flex-wrap: wrap; }
.lh-about-cta__email { color: var(--lh-white); font-size: 0.78rem; text-underline-offset: 0.3em; }

/* Company profile */
.lh-company-profile { padding-block: clamp(5rem, 9vw, 9rem); background: var(--lh-paper); }
.lh-company-profile__header { display: grid; grid-template-columns: minmax(180px, 0.45fr) minmax(0, 1.55fr); gap: clamp(2rem, 6vw, 7rem); padding-bottom: clamp(3rem, 6vw, 6rem); border-bottom: 1px solid var(--lh-line); }
.lh-company-profile__header h2 { margin: 0; font-family: var(--lh-serif); font-size: clamp(4rem, 9vw, 9rem); font-weight: 400; letter-spacing: -0.065em; line-height: 0.78; text-transform: uppercase; }
body.lh-lang-zh .lh-company-profile__header h2 { font-family: var(--lh-cjk); font-size: clamp(4.5rem, 9vw, 8.5rem); line-height: 0.9; text-transform: none; }
.lh-company-profile__content { display: grid; grid-template-columns: minmax(240px, 0.65fr) minmax(0, 1.35fr); gap: clamp(3rem, 8vw, 9rem); padding-top: clamp(3rem, 6vw, 6rem); }
.lh-company-profile__statement > p { max-width: 430px; margin: 0; font-family: var(--lh-serif); font-size: clamp(2rem, 3.5vw, 3.6rem); letter-spacing: -0.04em; line-height: 1.02; }
body.lh-lang-zh .lh-company-profile__statement > p { font-family: var(--lh-cjk); line-height: 1.2; }
.lh-company-profile__origin { display: block; margin-top: 2rem; color: var(--lh-slate); font-size: 0.68rem; font-weight: 700; letter-spacing: 0.16em; text-transform: uppercase; }
.lh-company-profile__copy { max-width: 760px; }
.lh-company-profile__copy > p { margin: 0 0 1.5rem; color: #444; font-size: clamp(1rem, 1.35vw, 1.14rem); line-height: 1.85; }
body.lh-lang-zh .lh-company-profile__copy > p { line-height: 2; }
.lh-company-profile__copy .lh-company-profile__closing { margin-top: 2.5rem; color: var(--lh-ink); font-family: var(--lh-serif); font-size: clamp(1.45rem, 2.4vw, 2.3rem); line-height: 1.25; }
body.lh-lang-zh .lh-company-profile__copy .lh-company-profile__closing { font-family: var(--lh-cjk); }
.lh-company-profile__email { display: grid; min-height: 72px; align-items: center; margin-top: 2.5rem; padding-block: 1rem; border-top: 1px solid var(--lh-ink); border-bottom: 1px solid var(--lh-ink); grid-template-columns: minmax(120px, 0.5fr) minmax(0, 1fr) auto; gap: 1rem; font-size: 0.72rem; letter-spacing: 0.1em; text-decoration: none; text-transform: uppercase; }
.lh-company-profile__email strong { font-size: clamp(0.85rem, 1.3vw, 1.05rem); letter-spacing: 0.03em; overflow-wrap: anywhere; text-transform: none; }
.lh-company-profile__email > span:last-child { font-family: var(--lh-serif); font-size: 1.8rem; }

/* Trading value section */
.lh-value-strip { padding-block: clamp(4rem, 7vw, 7rem); background: var(--lh-ink); color: var(--lh-white); }
.lh-value-strip__header { display: grid; align-items: end; grid-template-columns: minmax(0, 1fr) minmax(260px, 0.5fr); gap: 3rem; margin-bottom: 4rem; }
.lh-value-strip .lh-kicker, .lh-value-strip p { color: rgba(255,255,255,0.65); }
.lh-value-strip h2 { max-width: 850px; margin: 0; font-family: var(--lh-serif); font-size: clamp(2.5rem, 5vw, 5.2rem); font-weight: 400; letter-spacing: -0.045em; line-height: 0.98; }
.lh-value-grid { display: grid; border-top: 1px solid rgba(255,255,255,0.28); grid-template-columns: repeat(3, minmax(0, 1fr)); }
.lh-value-item { min-height: 210px; padding: 2rem clamp(1rem, 3vw, 2.5rem) 1rem 0; border-right: 1px solid rgba(255,255,255,0.2); }
.lh-value-item + .lh-value-item { padding-left: clamp(1rem, 3vw, 2.5rem); }
.lh-value-item:last-child { border-right: 0; }
.lh-value-item__number { display: block; margin-bottom: 2.5rem; color: rgba(255,255,255,0.45); font-family: var(--lh-serif); font-size: 1.2rem; }
.lh-value-item h3 { margin: 0 0 0.65rem; font-family: var(--lh-serif); font-size: 1.65rem; font-weight: 400; }
.lh-value-item p { max-width: 320px; margin: 0; font-size: 0.9rem; }

/* Product detail */
.lh-product-page { padding-block: clamp(3rem, 7vw, 7rem); }
.lh-product-back-row, .lh-product-detail, .lh-product-inquiry { width: min(100%, var(--lh-max)); margin-inline: auto; padding-inline: var(--lh-pad); }
.lh-product-back-row { margin-bottom: 1.75rem; }
.lh-product-back { display: inline-flex; align-items: center; gap: 0.65rem; color: var(--lh-slate); font-size: 0.72rem; font-weight: 700; letter-spacing: 0.1em; text-decoration: none; text-transform: uppercase; }
.lh-product-back span { font-size: 1.05rem; transition: transform 180ms ease; }
.lh-product-back:hover, .lh-product-back:focus-visible { color: var(--lh-ink); }
.lh-product-back:hover span, .lh-product-back:focus-visible span { transform: translateX(-0.2rem); }
.lh-product-detail { display: grid; align-items: start; grid-template-columns: minmax(0, 1.15fr) minmax(340px, 0.85fr); gap: clamp(2.5rem, 7vw, 8rem); }
.lh-product-detail__media { display: grid; min-height: 640px; place-items: center; background: var(--lh-paper); }
.lh-product-detail__media img { width: 100%; height: 100%; max-height: 700px; padding: 8%; object-fit: contain; mix-blend-mode: multiply; }
.lh-product-detail__content { position: sticky; top: 2rem; padding-top: 1rem; }
.lh-product-detail h1 { margin: 0; font-family: var(--lh-serif); font-size: clamp(3rem, 5vw, 5.5rem); font-weight: 400; letter-spacing: -0.05em; line-height: 0.94; }
.lh-product-detail__sku { margin: 1.2rem 0; color: var(--lh-slate); font-size: 0.75rem; letter-spacing: 0.12em; text-transform: uppercase; }
.lh-product-detail__intro { color: var(--lh-slate); }
.lh-spec-list { margin: 2rem 0; border-top: 1px solid var(--lh-ink); }
.lh-spec-list div { display: grid; padding: 0.9rem 0; border-bottom: 1px solid var(--lh-line); grid-template-columns: 40% 60%; gap: 1rem; }
.lh-spec-list dt { color: var(--lh-slate); font-size: 0.68rem; font-weight: 700; letter-spacing: 0.08em; text-transform: uppercase; }
.lh-spec-list dd { margin: 0; font-size: 0.9rem; }
.lh-product-inquiry { display: grid; margin-top: clamp(5rem, 9vw, 9rem); padding-top: clamp(4rem, 7vw, 7rem); border-top: 1px solid var(--lh-line); grid-template-columns: minmax(260px, 0.65fr) minmax(0, 1fr); gap: clamp(3rem, 8vw, 9rem); }
.lh-product-inquiry h2 { margin: 0; font-family: var(--lh-serif); font-size: clamp(2.2rem, 4vw, 4.2rem); font-weight: 400; letter-spacing: -0.04em; line-height: 1; }
.lh-product-inquiry > div > p:last-child { color: var(--lh-slate); }
.lh-inquiry-form { min-width: 0; }
.lh-form-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 1.3rem; }
.lh-form-grid label { display: grid; gap: 0.5rem; }
.lh-form-grid__wide { grid-column: 1 / -1; }
.lh-form-grid textarea { min-height: 150px; padding: 0.8rem; resize: vertical; }
.lh-consent { display: flex; align-items: start; gap: 0.55rem; margin: 1.3rem 0; color: var(--lh-slate); font-size: 0.76rem; }
.lh-consent input { margin-top: 0.25rem; }
.lh-honeypot { position: absolute; left: -10000px; }
.lh-form-notice { margin-bottom: 1rem; border: 1px solid var(--lh-line); padding: 0.8rem 1rem; }
.lh-form-notice--success { border-color: #45624d; }
.lh-form-notice--error { border-color: #8f3b31; }

/* Footer */
.lh-site-footer { background: #0d0d0d; color: var(--lh-white); }
.lh-footer-main { display: grid; padding-block: clamp(4rem, 7vw, 7rem); grid-template-columns: minmax(280px, 1.2fr) repeat(2, minmax(150px, 0.45fr)); gap: clamp(2.5rem, 6vw, 7rem); }
.lh-footer-brand { font-family: var(--lh-serif); font-size: clamp(2.4rem, 5vw, 5rem); letter-spacing: -0.04em; line-height: 1; }
.lh-footer-brand + p { max-width: 470px; color: rgba(255,255,255,0.58); }
.lh-footer-column h3 { margin: 0 0 1.2rem; color: rgba(255,255,255,0.45); font-size: 0.66rem; letter-spacing: 0.14em; text-transform: uppercase; }
.lh-footer-column a { display: block; margin: 0.55rem 0; color: rgba(255,255,255,0.82); font-size: 0.88rem; text-decoration: none; }
.lh-footer-bottom { display: flex; align-items: center; justify-content: space-between; gap: 1rem; padding-block: 1.3rem; border-top: 1px solid rgba(255,255,255,0.16); color: rgba(255,255,255,0.48); font-size: 0.68rem; letter-spacing: 0.08em; text-transform: uppercase; }
.lh-footer-bottom p { margin: 0; }

/* Basic fallback pages */
.lh-default-main { width: min(100%, 900px); min-height: 50vh; margin-inline: auto; padding: clamp(4rem, 8vw, 8rem) var(--lh-pad); }
.lh-default-main h1 { font-family: var(--lh-serif); font-size: clamp(2.7rem, 6vw, 6rem); font-weight: 400; letter-spacing: -0.05em; }
body.rtl { direction: rtl; }

@media (max-width: 1100px) {
  .lh-primary-header { grid-template-columns: 1fr auto; }
  .lh-nav { position: fixed; z-index: 49; top: 120px; right: 0; bottom: 0; left: 0; display: none; align-items: stretch; justify-content: start; padding: 2.5rem var(--lh-pad); background: var(--lh-white); flex-direction: column; }
  .menu-open .lh-nav { display: flex; }
  .lh-nav a { border-bottom: 1px solid var(--lh-line); padding: 1rem 0; font-family: var(--lh-serif); font-size: 1.7rem; font-weight: 400; letter-spacing: -0.02em; text-transform: none; }
  .lh-header-actions .lh-button { display: none; }
  .lh-menu-toggle { display: inline-flex; }
  .lh-product-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 820px) {
  .lh-utility__inner { justify-content: flex-end; text-align: right; }
  .lh-utility p { display: none; }
  .lh-utility__languages { display: flex; }
  .lh-primary-header { min-height: 74px; }
  .lh-nav { top: 108px; }
  .lh-hero { min-height: 670px; align-items: end; background-image: linear-gradient(0deg, rgba(7,11,12,0.94) 0%, rgba(8,12,13,0.32) 75%), url('assets/images/linghui-titanium-hero-v1.png'); background-position: 65% center; }
  .lh-hero h1 { font-size: clamp(3.4rem, 18vw, 7rem); }
  .lh-hero__note { display: none; }
  .lh-materials__header, .lh-company-profile__header, .lh-company-profile__content, .lh-value-strip__header, .lh-product-detail, .lh-product-inquiry { grid-template-columns: 1fr; }
  .lh-material-grid { grid-template-columns: 1fr; }
  .lh-material-card { min-height: 400px; }
  .lh-company-profile__header h2 { font-size: clamp(3.5rem, 15vw, 6.5rem); }
  body.lh-lang-zh .lh-company-profile__header h2 { font-size: clamp(4rem, 17vw, 6.5rem); }
  .lh-catalog { grid-template-columns: 1fr; }
  .lh-filter-toggle { display: inline-block; }
  .lh-filter-form { display: none; }
  .lh-filter-form.is-open { display: grid; }
  .lh-value-grid { grid-template-columns: 1fr; }
  .lh-value-item, .lh-value-item + .lh-value-item { min-height: auto; padding: 1.8rem 0; border-right: 0; border-bottom: 1px solid rgba(255,255,255,0.2); }
  .lh-value-item__number { margin-bottom: 1.2rem; }
  .lh-product-detail__media { min-height: auto; aspect-ratio: 1 / 1; }
  .lh-product-detail__content { position: static; }
  .lh-footer-main { grid-template-columns: 1fr 1fr; }
  .lh-footer-intro { grid-column: 1 / -1; }
  .lh-about-teaser__grid, .lh-about-hero__inner, .lh-about-story__grid, .lh-about-section-heading, .lh-about-offer__grid, .lh-about-cta__inner { grid-template-columns: 1fr; }
  .lh-about-hero { min-height: 680px; }
  .lh-about-hero__aside { max-width: 560px; padding: 1.8rem 0 0; border-top: 1px solid rgba(255,255,255,0.25); border-left: 0; }
  .lh-about-process__grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .lh-about-process__grid article:nth-child(2) { border-right: 0; }
  .lh-about-process__grid article:nth-child(n+3) { border-top: 1px solid var(--lh-line); }
  .lh-about-offer__intro { position: static; }
}

@media (max-width: 560px) {
  :root { --lh-pad: 1.15rem; }
  .lh-brand__name { font-size: 1.35rem; }
  .lh-hero__content { padding-bottom: 3.5rem; }
  .lh-hero h1 { font-size: clamp(3.1rem, 15.5vw, 4.8rem); }
  body.lh-lang-zh .lh-hero h1 { font-size: clamp(4rem, 20vw, 5rem); }
  body.lh-lang-zh .lh-about-hero h1 { font-size: clamp(3rem, 14vw, 4rem); line-height: 1.08; }
  body.lh-lang-zh .lh-about-story h2, body.lh-lang-zh .lh-about-section-heading h2, body.lh-lang-zh .lh-about-offer h2, body.lh-lang-zh .lh-about-cta h2 { font-size: clamp(2.55rem, 11.5vw, 3.4rem); line-height: 1.16; }
  .lh-hero__actions .lh-button { width: 100%; }
  .lh-material-card { min-height: 340px; }
  .lh-material-card__body { align-items: start; flex-direction: column; gap: 0.7rem; }
  .lh-material-card__arrow { display: none; }
  .lh-company-profile__email { align-items: start; grid-template-columns: 1fr auto; }
  .lh-company-profile__email strong { grid-column: 1 / -1; grid-row: 2; }
  .lh-company-profile__email > span:last-child { grid-column: 2; grid-row: 1; }
  .lh-catalog__heading { align-items: start; flex-direction: column; gap: 0.8rem; }
  .lh-product-grid { grid-template-columns: 1fr; }
  .lh-product-card__image { aspect-ratio: 1 / 1.1; }
  .lh-form-grid, .lh-footer-main { grid-template-columns: 1fr; }
  .lh-footer-intro, .lh-form-grid__wide { grid-column: auto; }
  .lh-footer-bottom { align-items: start; flex-direction: column; }
  .lh-about-teaser__facts, .lh-about-process__grid { grid-template-columns: 1fr; }
  .lh-about-teaser__facts > span, .lh-about-teaser__facts > span:first-child { min-height: auto; padding: 1.2rem 0; border-right: 0; border-bottom: 1px solid var(--lh-line); }
  .lh-about-teaser__facts > span:last-child { border-bottom: 0; }
  .lh-about-process__grid article, .lh-about-process__grid article + article { min-height: auto; padding: 2rem 0; border-top: 1px solid var(--lh-line); border-right: 0; }
  .lh-about-process__grid article:first-child { border-top: 0; }
  .lh-about-process__grid h3 { margin-top: 3rem; }
  .lh-about-offer__block { grid-template-columns: 1fr; gap: 1rem; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { scroll-behavior: auto !important; transition-duration: 0.01ms !important; }
}