@font-face {
  font-family: "Alibaba PuHuiTi";
  src: url("../fonts/AlibabaPuHuiTi-Regular.woff2") format("woff2");
  font-style: normal;
  font-weight: 400;
  font-display: swap;
}

@font-face {
  font-family: "Alibaba PuHuiTi";
  src: url("../fonts/AlibabaPuHuiTi-SemiBold.woff2") format("woff2");
  font-style: normal;
  font-weight: 600 800;
  font-display: swap;
}

:root {
  color-scheme: light;
  --surface: #ffffff;
  --surface-strong: #f7f7f7;
  --surface-raised: #ffffff;
  --ink: #161616;
  --ink-soft: #5f5f5f;
  --line: #e4e4e4;
  --line-strong: #bdbdbd;
  --navy: #171717;
  --navy-soft: #f2f2f2;
  --accent: #c91924;
  --accent-strong: #a70f19;
  --accent-soft: #f2f2f2;
  --on-accent: #ffffff;
  --warm: #c91924;
  --error: #8f1d24;
  --shadow: 0 18px 48px rgba(0, 0, 0, 0.13);
  --radius-card: 14px;
  --radius-control: 10px;
  --shell: min(1240px, calc(100% - 48px));
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--surface);
  color: var(--ink);
  font-family: "Alibaba PuHuiTi", "Microsoft YaHei", sans-serif;
  font-size: 16px;
  line-height: 1.65;
  text-rendering: optimizeLegibility;
}

body::selection { background: var(--accent); color: var(--on-accent); }
a { color: inherit; text-underline-offset: 0.22em; }
img { display: block; max-width: 100%; }
button, input, select { font: inherit; }
button, a { -webkit-tap-highlight-color: transparent; }
button { color: inherit; }
:focus-visible { outline: 3px solid var(--warm); outline-offset: 3px; }

::-webkit-scrollbar { width: 12px; height: 12px; }
::-webkit-scrollbar-track { background: var(--surface-strong); }
::-webkit-scrollbar-thumb { background: var(--line-strong); border: 3px solid var(--surface-strong); border-radius: 8px; }

.shell { width: var(--shell); margin-inline: auto; }
.section { padding-block: clamp(76px, 9vw, 132px); }
.section-kicker { margin: 0 0 12px; color: var(--ink-soft); font-size: 13px; font-weight: 600; letter-spacing: .08em; }
.skip-link { position: fixed; left: 16px; top: 12px; z-index: 100; padding: 10px 14px; background: var(--ink); color: var(--surface); transform: translateY(-160%); }
.skip-link:focus { transform: translateY(0); }

.site-header { position: sticky; top: 0; z-index: 20; height: 72px; border-bottom: 1px solid var(--line); background: var(--surface); }
.header-inner { height: 100%; display: flex; align-items: center; gap: 28px; }
.brand { display: inline-flex; align-items: center; gap: 10px; text-decoration: none; flex: 0 0 auto; }
.brand-mark { display: grid; place-items: center; width: 42px; height: 30px; border-radius: 8px; background: var(--accent); color: #ffffff; font-weight: 700; letter-spacing: -0.04em; }
.brand-copy { display: flex; flex-direction: column; line-height: 1.05; }
.brand-copy strong { font-size: 17px; letter-spacing: 0.01em; }
.brand-copy small { margin-top: 4px; color: var(--ink-soft); font-size: 8px; letter-spacing: 0.08em; }
:is(.site-header, .home-site-header, .site-footer) .brand-copy { align-items: stretch; }
:is(.site-header, .home-site-header, .site-footer) .brand-copy strong { display: block; width: 100%; text-align: justify; text-align-last: justify; white-space: nowrap; }
:is(.site-header, .home-site-header, .site-footer) .brand-copy small { white-space: nowrap; }
.primary-nav { display: flex; align-items: center; gap: 26px; margin-left: auto; }
.primary-nav a { position: relative; color: var(--ink-soft); font-size: 15px; text-decoration: none; white-space: nowrap; }
.primary-nav a:hover { color: var(--ink); }
.primary-nav a[aria-current="page"] { color: var(--accent); }
.primary-nav a[aria-current="page"]::after { content: ""; position: absolute; left: 0; right: 0; bottom: -24px; height: 2px; background: var(--accent); }
.header-actions { display: flex; align-items: center; gap: 10px; }
.menu-button { display: none; border: 0; background: transparent; }

.button { display: inline-flex; min-height: 46px; align-items: center; justify-content: center; border: 1px solid var(--accent); border-radius: var(--radius-control); padding: 11px 20px; background: var(--accent); color: var(--on-accent); font-weight: 600; line-height: 1; text-decoration: none; white-space: nowrap; cursor: pointer; transition: transform .2s ease, background-color .2s ease, border-color .2s ease; }
.button:hover { background: var(--accent-strong); border-color: var(--accent-strong); }
.button:active { transform: translateY(1px) scale(.99); }
.button-small { min-height: 44px; padding: 9px 14px; font-size: 14px; }
.button-secondary { background: transparent; color: var(--accent); }
.button-secondary:hover { background: color-mix(in srgb, var(--accent) 7%, #ffffff); color: var(--accent-strong); }
.button-light { border-color: var(--accent); background: var(--accent); color: #ffffff; }
.button-light:hover { border-color: var(--accent-strong); background: var(--accent-strong); }
.button-outline-light { border-color: var(--accent); background: transparent; color: var(--accent); }
.button-outline-light:hover { border-color: var(--accent-strong); background: #ffffff; color: var(--accent-strong); }
.text-button { min-height: 44px; border: 0; padding: 8px 6px; background: transparent; color: var(--ink-soft); text-decoration: underline; text-decoration-color: transparent; text-underline-offset: .3em; cursor: pointer; }
.text-button:hover { color: var(--ink); text-decoration-color: currentColor; }
.button-row, .contact-actions, .dialog-actions { display: flex; flex-wrap: wrap; gap: 12px; }

.home-site-header { background: #ffffff; }
.home-brand-row { min-height: 66px; display: flex; align-items: center; justify-content: space-between; gap: 24px; }
.home-contact-shortcuts { display: flex; align-items: center; gap: 20px; color: var(--ink-soft); font-size: 14px; }
.home-contact-shortcuts a { text-decoration: none; }
.home-contact-shortcuts a:hover { color: var(--accent); }
.priority-search { padding-block: 22px 24px; }
.priority-search > label { display: block; margin-bottom: 9px; color: var(--ink); font-size: 18px; font-weight: 600; }
.priority-search-control { display: grid; grid-template-columns: 1fr auto; gap: 10px; }
.priority-search-control input { min-height: 58px; border-width: 2px; border-color: var(--ink); padding-inline: 18px; font-size: 17px; }
.priority-search-control .button { min-width: 142px; min-height: 58px; }
.priority-search > p { margin: 8px 0 0; color: var(--ink-soft); font-size: 13px; }
.home-nav-wrap { position: relative; z-index: 30; border-block: 1px solid var(--line); }
.home-category-nav { min-height: 48px; display: flex; align-items: center; gap: clamp(20px, 3vw, 42px); overflow-x: auto; scrollbar-width: none; }
.home-category-nav::-webkit-scrollbar { display: none; }
.home-category-nav a, .product-menu-toggle { position: relative; flex: 0 0 auto; color: var(--ink); font-size: 15px; font-weight: 600; text-decoration: none; transition: color .18s ease; }
.product-menu-toggle { display: inline-flex; min-height: 46px; align-items: center; gap: 8px; border: 0; padding: 0; background: transparent; cursor: pointer; }
.home-category-nav .product-menu-toggle { color: var(--accent); }
.product-menu-toggle::after { content: ""; width: 7px; height: 7px; border-right: 1.5px solid currentColor; border-bottom: 1.5px solid currentColor; transform: translateY(-2px) rotate(45deg); transition: transform .2s ease; }
.product-menu-toggle[aria-expanded="true"]::after { transform: translateY(2px) rotate(225deg); }
.home-category-nav a:hover, .home-category-nav a[aria-current="page"], .product-menu-toggle:hover, .product-menu-toggle[aria-expanded="true"] { color: var(--accent); }
.home-category-nav a[aria-current="page"]::after { content: ""; position: absolute; left: 0; right: 0; bottom: -13px; height: 2px; background: var(--accent); transition: background-color .18s ease; }
.home-category-nav > a[aria-current="page"] { color: var(--ink); }
.home-category-nav > a[aria-current="page"]::after { background: var(--ink); }
.home-category-nav > a[aria-current="page"]:hover { color: var(--accent); }
.home-category-nav > a[aria-current="page"]:hover::after { background: var(--accent); }

.product-mega-menu { position: absolute; left: 0; right: 0; top: 100%; z-index: 40; border-bottom: 1px solid var(--line); background: var(--surface); box-shadow: 0 22px 42px rgba(0, 0, 0, .12); opacity: 0; transform: translateY(-8px); transition: opacity .2s ease, transform .2s ease; }
.product-mega-menu.is-open { opacity: 1; transform: translateY(0); }
.product-mega-menu-inner { padding-block: 28px 32px; }
.product-menu-heading { display: flex; align-items: end; justify-content: space-between; gap: 24px; margin-bottom: 22px; }
.product-menu-title { margin: 0; font-size: 25px; font-weight: 600; letter-spacing: -.02em; line-height: 1.2; }
.product-menu-heading p { margin: 6px 0 0; color: var(--ink-soft); font-size: 14px; }
.product-menu-all { flex: 0 0 auto; color: var(--ink); font-size: 14px; font-weight: 600; text-underline-offset: .3em; }
.product-menu-layout { display: grid; grid-template-columns: minmax(220px, 270px) minmax(0, 1fr); min-height: 300px; border-block: 1px solid var(--line); }
.product-primary-list { padding-block: 10px; border-right: 1px solid var(--line); }
.product-primary-list button { position: relative; display: flex; width: 100%; min-height: 46px; align-items: center; justify-content: space-between; border: 0; padding: 10px 20px 10px 14px; background: transparent; color: var(--ink-soft); text-align: left; cursor: pointer; }
.product-primary-list button::after { content: ""; width: 7px; height: 7px; border-top: 1.5px solid currentColor; border-right: 1.5px solid currentColor; transform: rotate(45deg); }
.product-primary-list button:hover { background: var(--surface-strong); color: var(--ink); }
.product-primary-list button[aria-selected="true"] { background: var(--ink); color: var(--on-accent); font-weight: 600; }
.product-secondary-area { min-width: 0; padding: 28px 34px; }
.product-secondary-title { margin: 0 0 18px; font-size: 20px; font-weight: 600; }
.product-secondary-links { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 0 28px; }
.product-secondary-links a { display: flex; min-height: 50px; align-items: center; border-bottom: 1px solid var(--line); color: var(--ink-soft); font-size: 16px; text-decoration: none; }
.product-secondary-links a::after { content: ""; width: 6px; height: 6px; margin-left: auto; border-top: 1px solid currentColor; border-right: 1px solid currentColor; transform: rotate(45deg); opacity: 0; transition: opacity .2s ease, transform .2s ease; }
.product-secondary-links a:hover { color: var(--ink); }
.product-secondary-links a:hover::after { opacity: 1; transform: translateX(2px) rotate(45deg); }

.ad-carousel { position: relative; border-bottom: 1px solid var(--line); background: #ffffff; overflow: hidden; }
.carousel-track { position: relative; min-height: 470px; }
.carousel-slide { position: absolute; inset: 0; display: grid; visibility: hidden; opacity: 0; pointer-events: none; transition: opacity .5s ease, visibility .5s ease; }
.carousel-slide.is-active { position: relative; visibility: visible; opacity: 1; pointer-events: auto; }
.carousel-layout { min-height: 470px; display: grid; grid-template-columns: minmax(0, .9fr) minmax(520px, 1.1fr); align-items: center; gap: clamp(50px, 7vw, 110px); padding-block: 42px; }
.carousel-copy h1, .carousel-copy h2 { max-width: 14ch; margin: 0; color: var(--ink); font-size: clamp(42px, 4vw, 58px); font-weight: 600; letter-spacing: -0.035em; line-height: 1.04; text-wrap: balance; }
.carousel-copy p { max-width: 34em; margin: 22px 0 26px; color: var(--ink-soft); font-size: 17px; line-height: 1.7; }
.carousel-visual { position: relative; min-height: 360px; border-radius: var(--radius-card); background: var(--accent-soft); overflow: hidden; }
.product-collage img, .carousel-product-pair img { position: absolute; border-radius: 12px; background: #ffffff; object-fit: contain; box-shadow: var(--shadow); }
.collage-main { width: 58%; height: 76%; right: 7%; bottom: 7%; }
.collage-top { width: 28%; height: 38%; right: 4%; top: 5%; }
.collage-bottom { width: 30%; height: 40%; left: 7%; bottom: 8%; }
.carousel-product-pair img:first-child { width: 56%; height: 72%; left: 7%; top: 8%; }
.carousel-product-pair img:last-child { width: 42%; height: 58%; right: 6%; bottom: 8%; }
.service-photo { margin: 0; background: var(--surface-strong); }
.service-photo img { width: 100%; height: 360px; object-fit: cover; }
.carousel-controls { min-height: 58px; display: flex; align-items: center; justify-content: space-between; gap: 24px; }
.carousel-dots { display: flex; gap: 8px; }
.carousel-dots button { position: relative; width: 44px; height: 44px; border: 0; padding: 0; background: transparent; cursor: pointer; }
.carousel-dots button::before { position: absolute; left: 50%; top: 50%; width: 34px; height: 4px; background: var(--line-strong); content: ""; transform: translate(-50%, -50%); }
.carousel-dots button.is-active::before { background: var(--accent); }
.carousel-buttons { display: flex; gap: 6px; }
.carousel-buttons button { min-height: 44px; border: 1px solid var(--line); border-radius: 8px; padding: 8px 12px; background: #ffffff; color: var(--ink); cursor: pointer; }
.carousel-buttons button:hover { border-color: var(--accent); color: var(--accent); }

.hero { min-height: calc(100dvh - 72px); display: grid; grid-template-columns: minmax(0, .88fr) minmax(480px, 1.12fr); align-items: center; gap: clamp(40px, 6vw, 96px); padding-block: clamp(52px, 7vw, 88px); }
.hero-copy { position: relative; z-index: 2; }
.hero h1 { max-width: 10ch; margin: 0; font-size: clamp(52px, 5.2vw, 74px); font-weight: 600; letter-spacing: -0.04em; line-height: .98; text-wrap: balance; }
.hero-summary { max-width: 30em; margin: 28px 0 30px; color: var(--ink-soft); font-size: clamp(17px, 1.5vw, 20px); line-height: 1.7; }
.hero-stage { position: relative; min-height: 590px; border-radius: 48% 18% 38% 16% / 24% 48% 16% 40%; background: var(--accent-soft); overflow: hidden; isolation: isolate; }
.hero-stage::before { content: ""; position: absolute; inset: 9% 10% 16% 18%; border: 1px solid color-mix(in srgb, var(--accent) 34%, transparent); border-radius: 50%; transform: rotate(-11deg); }
.hero-stage::after { content: ""; position: absolute; left: 13%; right: 7%; bottom: 8%; height: 18%; border-radius: 50%; background: rgba(0, 0, 0, .14); filter: blur(30px); z-index: -1; }
.stage-note { position: absolute; left: 6%; top: 8%; z-index: 4; display: flex; flex-direction: column; color: var(--navy); line-height: 1; }
.stage-note strong { font-size: 40px; font-variant-numeric: tabular-nums; }
.stage-note span { margin-top: 7px; font-size: 12px; }
.stage-product { position: absolute; margin: 0; border-radius: var(--radius-card); background: #fafafa; box-shadow: var(--shadow); overflow: hidden; }
.stage-product img { width: 100%; height: 100%; object-fit: contain; }
.stage-product-main { width: 64%; height: 64%; right: 8%; bottom: 8%; z-index: 2; }
.stage-product-top { width: 30%; height: 31%; right: 3%; top: 6%; z-index: 3; }
.stage-product-bottom { width: 33%; height: 32%; left: 7%; bottom: 7%; z-index: 3; }

.section-heading { max-width: 680px; margin-bottom: 36px; }
.section-heading h2, .service-intro h2, .story-copy h2, .contact-band h2, .about-lead h2, .principles-layout h2, .contact-guide h2, .map-band h2 { margin: 0; font-size: clamp(34px, 4.2vw, 58px); font-weight: 600; letter-spacing: -0.035em; line-height: 1.08; text-wrap: balance; }
.section-heading p, .service-intro p, .story-copy > p, .contact-band p, .about-lead p, .principles-layout > div > p, .contact-guide > div > p, .map-band p { max-width: 65ch; margin: 18px 0 0; color: var(--ink-soft); font-size: 17px; }
.compact-heading { margin-bottom: 24px; }
.home-search { display: grid; grid-template-columns: 180px 1fr; gap: 20px; align-items: end; margin-bottom: 34px; }
.home-search label, .search-field label, .select-field label { display: block; margin-bottom: 7px; color: var(--ink-soft); font-size: 13px; font-weight: 600; }
.search-composition { display: grid; grid-template-columns: 1fr auto; gap: 10px; }
input, select { width: 100%; min-height: 48px; border: 1px solid var(--line-strong); border-radius: var(--radius-control); padding: 10px 14px; background: var(--surface-raised); color: var(--ink); }
input::placeholder { color: color-mix(in srgb, var(--ink-soft) 86%, transparent); }
input:focus, select:focus { border-color: var(--accent); box-shadow: 0 0 0 3px color-mix(in srgb, var(--accent) 18%, transparent); outline: 0; }
.category-composition { display: grid; grid-template-columns: 1.35fr .92fr .98fr; gap: 14px; }
.category-block { min-height: 270px; display: flex; flex-direction: column; align-items: flex-start; justify-content: space-between; border-radius: var(--radius-card); padding: 28px; color: #f3f3f3; text-decoration: none; overflow: hidden; transition: transform .24s ease; }
.category-block:hover { transform: translateY(-3px); }
.category-block > span:first-child { font-size: 14px; }
.category-block strong { max-width: 12em; font-size: 25px; line-height: 1.28; }
.category-link { border-bottom: 1px solid currentColor; font-size: 14px; }
.category-instruments { background: var(--ink); }
.category-consumables { background: #292929; }
.category-reagents { background: #363636; }

.featured { background: #ffffff; }
.featured-grid, .product-grid { display: grid; gap: 18px; }
.featured-grid { grid-template-columns: repeat(5, minmax(0, 1fr)); }
.product-grid { grid-template-columns: repeat(5, minmax(0, 1fr)); }
.center-action { margin-top: 36px; text-align: center; }
.product-card { min-width: 0; display: flex; flex-direction: column; border-radius: var(--radius-card); background: var(--surface-raised); overflow: hidden; box-shadow: 0 1px 0 var(--line); transition: transform .22s ease, box-shadow .22s ease; }
.product-card:hover { transform: translateY(-3px); box-shadow: var(--shadow); }
.product-image-wrap { position: relative; width: 100%; aspect-ratio: 1 / 1; border: 0; padding: 0; background: #f6f6f6; overflow: hidden; cursor: pointer; }
.product-image { width: 100%; height: 100%; object-fit: contain; transition: opacity .25s ease, transform .35s ease; }
.product-image-secondary { position: absolute; inset: 0; opacity: 0; }
.product-card:hover .product-image-secondary { opacity: 1; transform: scale(1.025); }
.product-card-copy { display: flex; flex: 1; flex-direction: column; padding: 18px; }
.product-brand { margin: 0 0 7px; color: var(--accent); font-size: 13px; font-weight: 600; }
.product-card h3 { min-height: 3.1em; margin: 0; font-size: 17px; line-height: 1.48; font-weight: 600; }
.product-meta { display: grid; grid-template-columns: 1fr auto; gap: 10px; margin: 13px 0 16px; color: var(--ink-soft); font-size: 13px; }
.product-meta span:first-child { overflow-wrap: anywhere; font-variant-numeric: tabular-nums; }
.product-spec { min-height: 2.8em; margin: 0 0 18px; color: var(--ink-soft); font-size: 14px; line-height: 1.4; }
.product-method { margin: -8px 0 18px; color: var(--ink-soft); font-size: 13px; line-height: 1.45; }
.product-open { width: 100%; min-height: 44px; display: grid; place-items: center; margin-top: auto; border: 1px solid var(--line-strong); border-radius: var(--radius-control); background: transparent; color: var(--ink); font-weight: 600; text-decoration: none; cursor: pointer; }
.product-open:hover { border-color: var(--accent); color: var(--accent); }
.product-skeleton { min-height: 420px; border-radius: var(--radius-card); background: linear-gradient(100deg, var(--surface-raised) 30%, var(--surface-strong) 48%, var(--surface-raised) 66%); background-size: 220% 100%; animation: skeleton 1.4s ease-in-out infinite; }
@keyframes skeleton { to { background-position-x: -220%; } }

.service-section { display: grid; grid-template-columns: .85fr 1.15fr; gap: clamp(40px, 8vw, 120px); }
.service-intro { position: static; align-self: start; }
.service-path { margin: 0; padding: 0; list-style: none; counter-reset: service; }
.service-path li { display: grid; grid-template-columns: minmax(160px, .7fr) 1.3fr; gap: 28px; padding: 30px 0; border-bottom: 1px solid var(--line); }
.service-path li:first-child { padding-top: 8px; }
.service-path strong { font-size: 20px; }
.service-path span { color: var(--ink-soft); }
.service-list { grid-column: 1 / -1; display: flex; flex-wrap: wrap; gap: 10px; margin-top: 18px; }
.service-list span, .client-cloud span { border: 1px solid var(--line); border-radius: var(--radius-control); padding: 10px 14px; background: var(--surface-raised); }

.authorization-section { scroll-margin-top: 24px; border-block: 1px solid var(--line); background: var(--surface-strong); }
.authorization-heading { display: grid; grid-template-columns: .9fr 1.1fr; align-items: end; gap: clamp(40px, 8vw, 120px); margin-bottom: 48px; }
.authorization-heading h2 { margin: 0; font-size: clamp(42px, 5vw, 68px); font-weight: 600; letter-spacing: -.04em; line-height: 1; }
.authorization-heading > p { max-width: 38em; margin: 0; color: var(--ink-soft); font-size: 17px; }
.authorization-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 54px 28px; }
.authorization-item { min-width: 0; border-top: 1px solid var(--line-strong); padding-top: 18px; }
.authorization-preview { display: grid; height: 430px; place-items: center; padding: 24px; background: #ffffff; overflow: hidden; }
.authorization-preview img { width: 100%; height: 100%; object-fit: contain; transition: transform .25s ease; }
.authorization-preview:hover img { transform: scale(1.012); }
.authorization-actions { width: 100%; margin-top: 42px; text-align: center; }
.authorization-page-intro { max-width: 920px; padding-block: clamp(64px, 7vw, 104px) clamp(48px, 5vw, 72px); }
.authorization-page-intro h1 { margin: 0; font-size: clamp(52px, 6.2vw, 82px); font-weight: 600; letter-spacing: -.04em; line-height: 1; }
.authorization-page-intro p { max-width: 64ch; margin: 26px 0 0; color: var(--ink-soft); font-size: 18px; }
.authorization-page-section { border-top: 1px solid var(--line); background: var(--surface-strong); }
.authorization-grid--all .authorization-preview { height: 480px; }
.authorization-item--portrait .authorization-preview { display: flex; align-items: center; justify-content: center; }
.authorization-item--portrait .authorization-preview img { display: block; width: auto; height: 82%; max-width: 72%; margin: auto; object-position: center center; }
.authorization-copy h2 { margin: 0; font-size: 23px; line-height: 1.3; }
.authorization-copy { padding-top: 20px; }
.authorization-copy > p { margin: 0 0 4px; color: var(--ink-soft); font-size: 13px; font-weight: 600; letter-spacing: .04em; }
.authorization-copy h3 { margin: 0; font-size: 23px; line-height: 1.3; }
.authorization-copy dl { margin: 18px 0; }
.authorization-copy dl div { display: grid; grid-template-columns: 76px 1fr; gap: 18px; padding: 8px 0; border-bottom: 1px solid var(--line); font-size: 14px; }
.authorization-copy dt { color: var(--ink-soft); }
.authorization-copy dd { margin: 0; overflow-wrap: anywhere; }

.story-section { border-block: 1px solid var(--line); background: #ffffff; color: var(--ink); }
.story-layout { display: grid; grid-template-columns: 1.05fr .95fr; align-items: center; gap: clamp(42px, 8vw, 110px); }
.story-image { margin: 0; border-radius: var(--radius-card); overflow: hidden; }
.story-image img { width: 100%; aspect-ratio: 1 / 1; object-fit: cover; }
.story-copy > p { color: var(--ink-soft); }
.fact-list { margin: 34px 0; }
.fact-list div { display: grid; grid-template-columns: 120px 1fr; gap: 20px; padding: 16px 0; border-bottom: 1px solid var(--line); }
.fact-list dt { color: var(--ink-soft); }
.fact-list dd { margin: 0; }
.text-link { color: var(--accent); font-weight: 600; }

.contact-band { display: flex; align-items: center; justify-content: space-between; gap: 50px; margin-block: clamp(76px, 9vw, 132px); border: 1px solid color-mix(in srgb, var(--accent) 25%, var(--line)); border-radius: var(--radius-card); padding: clamp(34px, 5vw, 64px); background: var(--accent-soft); color: var(--ink); }
.contact-band h2 { font-size: clamp(30px, 3.6vw, 48px); }
.contact-band p { color: var(--ink-soft); }
.contact-actions { justify-content: flex-end; }

.site-footer { margin-top: 86px; border-top: 1px solid var(--line); padding: 56px 0 24px; }
.home-footer { margin-top: 0; }
.footer-grid { display: grid; grid-template-columns: 1.25fr .62fr 1fr auto; gap: clamp(34px, 4vw, 60px); }
.footer-grid > div { display: flex; flex-direction: column; align-items: flex-start; gap: 8px; }
.footer-grid h2 { margin: 0 0 12px; font-size: 15px; }
.footer-grid a:not(.brand) { color: var(--ink-soft); text-decoration: none; }
.footer-grid a:not(.brand):hover { color: var(--accent); }
.footer-grid p { max-width: 32em; margin: 0; color: var(--ink-soft); font-size: 14px; }
.footer-grid > .footer-wechat { align-items: center; gap: 10px; justify-self: end; }
.footer-wechat-button { border: 0; padding: 0; background: transparent; cursor: pointer; }
.footer-wechat-qr { width: 132px; border: 1px solid var(--line); }
.footer-wechat-copy strong, .footer-wechat-copy span { display: block; text-align: center; }
.footer-wechat-copy strong { font-size: 14px; }
.footer-wechat-copy span { margin-top: 2px; color: var(--ink-soft); font-size: 12px; }
.footer-bottom { display: flex; justify-content: space-between; gap: 24px; margin-top: 46px; padding-top: 20px; border-top: 1px solid var(--line); color: var(--ink-soft); font-size: 13px; }

.header-wechat { position: relative; }
.header-wechat-popover { position: absolute; top: calc(100% + 12px); right: 0; z-index: 50; width: 220px; visibility: hidden; opacity: 0; transform: translateY(-6px); border: 1px solid var(--line); border-radius: var(--radius-card); padding: 15px; background: var(--surface-raised); box-shadow: var(--shadow); pointer-events: none; transition: opacity 160ms ease, transform 160ms ease, visibility 160ms ease; }
.header-wechat-popover::before { position: absolute; top: -6px; right: 28px; width: 10px; height: 10px; border-top: 1px solid var(--line); border-left: 1px solid var(--line); background: var(--surface-raised); content: ""; transform: rotate(45deg); }
.header-wechat:hover .header-wechat-popover, .header-wechat:focus-within .header-wechat-popover { visibility: visible; opacity: 1; transform: translateY(0); }
.header-wechat-popover strong, .header-wechat-popover span { display: block; text-align: center; }
.header-wechat-popover strong { margin-top: 10px; font-size: 15px; }
.header-wechat-popover span { margin-top: 2px; color: var(--ink-soft); font-size: 12px; }
.wechat-qr-crop { position: relative; display: block; overflow: hidden; aspect-ratio: 1; background: #ffffff; }
.wechat-qr-crop img { position: absolute; width: 442.7%; max-width: none; height: auto; transform: translate(-38.89%, -70.19%); }
.header-wechat-qr { width: 188px; }

.catalog-hero { border-bottom: 1px solid var(--line); padding-block: 64px; background: #ffffff; color: var(--ink); }
.catalog-hero-inner { display: flex; align-items: flex-end; justify-content: space-between; gap: 40px; }
.catalog-hero h1 { margin: 0; font-size: clamp(48px, 6.2vw, 78px); letter-spacing: -0.04em; line-height: 1; }
.catalog-hero p { max-width: 58ch; margin: 20px 0 0; color: var(--ink-soft); }
.catalog-count { display: flex; flex-direction: column; align-items: flex-end; line-height: 1; }
.catalog-count strong { color: var(--ink); font-size: 42px; font-variant-numeric: tabular-nums; }
.catalog-count span { margin-top: 8px; color: var(--ink-soft); }
.catalog-section { padding-block: 54px 100px; }
.catalog-toolbar { display: grid; grid-template-columns: minmax(300px, 1fr) minmax(180px, .35fr) auto; gap: 14px; align-items: end; }
.reset-button { margin-bottom: 4px; }
.category-tabs { display: flex; gap: 8px; margin: 26px 0; overflow-x: auto; }
.category-tab { min-width: 78px; min-height: 44px; border: 1px solid var(--line-strong); border-radius: 999px; padding: 8px 16px; background: transparent; color: var(--ink-soft); cursor: pointer; }
.category-tab:hover, .category-tab.is-active { border-color: var(--accent); background: var(--accent-soft); color: var(--accent-strong); }
.catalog-status { display: flex; justify-content: space-between; gap: 20px; margin: 18px 0 26px; color: var(--ink-soft); font-size: 14px; }
.empty-state { max-width: 620px; margin: 70px auto; text-align: center; }
.empty-state h2 { margin: 0; font-size: 30px; }
.empty-state p { margin: 12px 0 24px; color: var(--ink-soft); }
.empty-state .button-row { justify-content: center; }
.pagination { display: grid; justify-items: center; gap: 18px; margin-top: 44px; }
.pagination-pages { display: flex; flex-wrap: wrap; align-items: center; justify-content: center; gap: 8px; }
.page-button { min-width: 44px; min-height: 44px; border: 1px solid var(--line); border-radius: 9px; background: var(--surface-raised); color: var(--ink); cursor: pointer; }
.page-button:hover, .page-button.is-active { border-color: var(--accent); background: var(--accent); color: var(--on-accent); }
.pagination-jump { display: flex; flex-wrap: wrap; align-items: center; justify-content: center; gap: 8px; color: var(--ink-soft); font-size: 14px; }
.pagination-jump input { width: 82px; min-height: 44px; padding: 8px 10px; text-align: center; font-variant-numeric: tabular-nums; }
.pagination-jump input[aria-invalid="true"] { border-color: var(--error); }
.page-jump-button { min-height: 44px; border: 1px solid var(--accent); border-radius: 9px; padding: 8px 16px; background: var(--accent); color: var(--on-accent); font-weight: 600; cursor: pointer; }
.page-jump-button:hover { background: var(--accent-strong); }
.page-jump-range { margin-left: 4px; }
.page-jump-error { flex-basis: 100%; min-height: 1.4em; color: var(--error); text-align: center; }

dialog { color: var(--ink); }
.product-dialog, .consult-dialog { width: min(1060px, calc(100% - 32px)); max-height: min(88dvh, 880px); border: 0; border-radius: var(--radius-card); padding: 0; background: var(--surface-raised); box-shadow: var(--shadow); overflow: auto; }
.product-dialog::backdrop, .consult-dialog::backdrop { background: rgba(0, 0, 0, .74); backdrop-filter: blur(5px); }
.dialog-close { position: sticky; float: right; top: 14px; z-index: 3; min-height: 44px; margin: 14px 14px 0 0; border: 1px solid var(--line); border-radius: var(--radius-control); padding: 8px 12px; background: var(--surface-raised); color: var(--ink); cursor: pointer; }
.product-dialog-layout { display: grid; grid-template-columns: 1.05fr .95fr; min-height: 610px; }
.dialog-gallery { display: grid; grid-template-rows: 1fr auto; min-width: 0; padding: 38px; background: #f3f3f3; }
.dialog-gallery > img { width: 100%; height: 450px; object-fit: contain; }
.dialog-thumbnails { display: flex; gap: 10px; overflow-x: auto; padding-top: 14px; }
.dialog-thumbnail { width: 76px; height: 76px; flex: 0 0 auto; border: 1px solid #cccccc; border-radius: 8px; padding: 4px; background: #fcfcfc; cursor: pointer; }
.dialog-thumbnail.is-active { border-color: var(--accent); }
.dialog-thumbnail img { width: 100%; height: 100%; object-fit: contain; }
.dialog-copy { align-self: center; padding: 60px 48px; }
.dialog-copy h2 { margin: 0; font-size: clamp(27px, 3vw, 40px); line-height: 1.2; }
.product-details { margin: 30px 0; }
.product-details div { display: grid; grid-template-columns: 68px 1fr; gap: 20px; padding: 11px 0; border-bottom: 1px solid var(--line); }
.product-details dt { color: var(--ink-soft); }
.product-details dd { margin: 0; overflow-wrap: anywhere; }
.dialog-notice { color: var(--ink-soft); font-size: 14px; }
.consult-dialog { width: min(760px, calc(100% - 32px)); }
.consult-layout { display: grid; grid-template-columns: .9fr 1.1fr; }
.consult-image { background: #f1f1f1; }
.consult-image > img { width: 100%; height: 100%; object-fit: contain; }
.consult-qr-panel { display: grid; place-items: center; padding: 36px; }
.consult-dialog-qr { width: min(100%, 320px); border: 1px solid var(--line); border-radius: var(--radius-card); }
.consult-copy { align-self: center; padding: 48px; }
.consult-copy h2 { margin: 0; font-size: 34px; }
.consult-copy p { color: var(--ink-soft); }
.consult-detail { display: grid; gap: 10px; margin: 22px 0; }
.consult-detail a { font-weight: 600; }

.page-hero { min-height: 580px; display: grid; grid-template-columns: .9fr 1.1fr; align-items: center; gap: clamp(48px, 8vw, 110px); padding-block: 56px; }
.page-hero-copy h1, .contact-copy h1 { max-width: 10ch; margin: 0; font-size: clamp(48px, 5.6vw, 74px); font-weight: 600; letter-spacing: -0.04em; line-height: 1; }
.line-title span { display: block; white-space: nowrap; }
.about-hero .line-title { max-width: none; }
.page-hero-copy p, .contact-copy > p { max-width: 34em; margin: 26px 0 0; color: var(--ink-soft); font-size: 19px; }
.page-hero-image { margin: 0; border-radius: 42% 16% 24% 12%; overflow: hidden; }
.page-hero-image img { width: 100%; aspect-ratio: 1.08 / 1; object-fit: cover; }
.about-hero .page-hero-image { width: min(100%, 500px); justify-self: end; border-radius: 0; overflow: visible; }
.about-hero .page-hero-image img { display: block; height: auto; aspect-ratio: 3 / 4; border-radius: var(--radius-card); object-position: center; }
.page-hero-image figcaption, .about-story figcaption { margin-top: 12px; color: var(--ink-soft); font-size: 14px; }
.about-intro { display: grid; grid-template-columns: 1.1fr .9fr; gap: clamp(50px, 10vw, 150px); }
.about-body { padding-top: 8px; color: var(--ink-soft); font-size: 18px; }
.about-body p { max-width: 55ch; margin: 0 0 24px; }
.about-stories { border-top: 1px solid var(--line); }
.about-story { display: grid; grid-template-columns: minmax(0, .82fr) minmax(0, 1.18fr); align-items: center; gap: clamp(50px, 9vw, 132px); padding-block: clamp(64px, 8vw, 112px); }
.about-story + .about-story { border-top: 1px solid var(--line); }
.about-story-copy h2 { max-width: 12ch; margin: 0; font-size: clamp(34px, 4.2vw, 58px); font-weight: 600; letter-spacing: -0.035em; line-height: 1.08; text-wrap: balance; }
.about-story-copy > p { max-width: 33em; margin: 22px 0 0; color: var(--ink-soft); font-size: 17px; }
.about-story figure { margin: 0; }
.about-story-media img { width: 100%; aspect-ratio: 4 / 3; border-radius: var(--radius-card); object-fit: cover; }
.about-company-media { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); align-items: start; gap: 16px; }
.about-company-media img { display: block; width: 100%; height: auto; border-radius: var(--radius-card); }
.about-recognition { align-items: start; }
.recognition-notes { display: grid; gap: 22px; margin-top: 34px; }
.recognition-notes > div { border-top: 1px solid var(--line); padding-top: 18px; }
.recognition-notes h3 { margin: 0; font-size: 19px; }
.recognition-notes p { max-width: 35em; margin: 8px 0 0; color: var(--ink-soft); }
.about-recognition-media { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 16px; }
.about-recognition-media { align-items: start; }
.about-recognition-media img { display: block; width: 100%; height: auto; border-radius: var(--radius-card); }
.principles-section { background: var(--surface-strong); }
.principles-layout { display: grid; grid-template-columns: .8fr 1.2fr; gap: clamp(50px, 10vw, 140px); }
.principles-list { margin: 0; }
.principles-list div { display: grid; grid-template-columns: 120px 1fr; gap: 28px; padding: 24px 0; border-bottom: 1px solid var(--line); }
.principles-list dt { color: var(--accent); font-size: 22px; font-weight: 600; }
.principles-list dd { margin: 0; color: var(--ink-soft); }
.client-cloud { display: flex; flex-wrap: wrap; gap: 10px; }
.client-cloud span { color: var(--ink-soft); }
.partners-link-section { display: flex; align-items: end; justify-content: space-between; gap: 48px; border-top: 1px solid var(--line); }
.partners-link-section h2 { margin: 0; font-size: clamp(38px, 4.8vw, 64px); letter-spacing: -.04em; line-height: 1; }
.partners-link-section p:not(.section-kicker) { margin: 18px 0 0; color: var(--ink-soft); font-size: 17px; }

.partners-hero { min-height: 440px; display: flex; flex-direction: column; justify-content: center; padding-block: 60px; }
.partners-hero h1 { margin: 0; font-size: clamp(56px, 7vw, 88px); font-weight: 600; letter-spacing: -.04em; line-height: .98; }
.partners-hero > p:last-child { max-width: 43em; margin: 30px 0 0; color: var(--ink-soft); font-size: 19px; }
.partner-group { border-top: 1px solid var(--line); }
.partner-group-heading { display: grid; grid-template-columns: .72fr 1.28fr; align-items: end; gap: clamp(40px, 8vw, 120px); margin-bottom: 42px; }
.partner-group-heading h2 { margin: 0; font-size: clamp(38px, 4.8vw, 64px); letter-spacing: -.04em; line-height: 1; }
.partner-group-heading p { max-width: 40em; margin: 0; color: var(--ink-soft); font-size: 17px; }
.partner-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 34px 22px; }
.partner-card { min-width: 0; display: block; border-top: 1px solid var(--line-strong); padding-top: 14px; text-decoration: none; }
.partner-logo { display: grid; height: 148px; place-items: center; padding: 24px; background: var(--surface-strong); overflow: hidden; }
.partner-logo img { width: 100%; height: 100px; object-fit: contain; filter: saturate(.88); transition: transform .24s ease, filter .24s ease; }
.partner-card strong { display: block; margin-top: 15px; font-size: 17px; line-height: 1.35; }
.partner-card:hover .partner-logo img { filter: saturate(1); transform: scale(1.035); }
.partner-research { background: var(--surface-strong); }
.partner-research .partner-card { border-color: var(--line-strong); }
.partner-research .partner-logo { background: #ffffff; }
.partner-source-note { margin: 48px 0 0; color: var(--ink-soft); font-size: 13px; }

.contact-hero { min-height: min(720px, calc(100dvh - 72px)); display: grid; grid-template-columns: 1fr .72fr; align-items: center; gap: clamp(50px, 9vw, 140px); padding-block: 56px; }
.direct-contact-list { display: grid; margin-top: 42px; }
.direct-contact-list a { display: grid; grid-template-columns: 120px 1fr; gap: 20px; padding: 18px 0; border-bottom: 1px solid var(--line); text-decoration: none; }
.direct-contact-list span { color: var(--ink-soft); }
.direct-contact-list strong { overflow-wrap: anywhere; }
.wechat-card { width: min(100%, 420px); justify-self: end; margin: 0; }
.wechat-card > img { border-radius: var(--radius-card); box-shadow: var(--shadow); }
.contact-wechat-qr { width: 100%; border: 1px solid var(--line); border-radius: var(--radius-card); box-shadow: var(--shadow); }
.wechat-card figcaption { margin-top: 14px; color: var(--ink-soft); font-size: 14px; text-align: center; }
.contact-guide { display: grid; grid-template-columns: .8fr 1.2fr; gap: clamp(50px, 10vw, 140px); }
.contact-guide ul { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; margin: 0; padding: 0; list-style: none; }
.contact-guide li { min-height: 170px; border-radius: var(--radius-card); padding: 24px; background: var(--surface-strong); }
.contact-guide li strong, .contact-guide li span { display: block; }
.contact-guide li strong { margin-bottom: 12px; font-size: 19px; }
.contact-guide li span { color: var(--ink-soft); }
.map-band { margin-top: 30px; padding-block: 70px; background: var(--accent-soft); }
.map-band-inner { display: flex; align-items: center; justify-content: space-between; gap: 30px; }

.breadcrumb { display: flex; flex-wrap: wrap; gap: 8px; padding-top: 28px; color: var(--ink-soft); font-size: 14px; }
.breadcrumb a { color: var(--accent); text-decoration: none; }
.product-detail { display: grid; grid-template-columns: minmax(0, 1.05fr) minmax(420px, .95fr); gap: clamp(50px, 7vw, 96px); padding-block: 28px 76px; }
.product-detail-gallery { min-width: 0; }
.product-main-image { display: grid; place-items: center; min-height: 520px; border-radius: var(--radius-card); background: var(--surface-strong); overflow: hidden; }
.product-main-image img { width: 100%; height: 520px; object-fit: contain; }
.product-detail-thumbnails { display: flex; gap: 10px; margin-top: 14px; overflow-x: auto; }
.product-detail-thumbnail { width: 84px; height: 84px; flex: 0 0 auto; border: 1px solid var(--line); border-radius: 10px; padding: 5px; background: #ffffff; cursor: pointer; }
.product-detail-thumbnail.is-active { border-color: var(--accent); box-shadow: 0 0 0 2px var(--accent-soft); }
.product-detail-thumbnail img { width: 100%; height: 100%; object-fit: contain; }
.product-detail-copy { align-self: start; padding-top: 26px; }
.product-detail-copy .product-brand { margin-bottom: 12px; font-size: 15px; }
.product-detail-copy h1 { max-width: 14ch; margin: 0; color: var(--ink); font-size: clamp(36px, 3.8vw, 52px); font-weight: 600; letter-spacing: -0.035em; line-height: 1.12; overflow-wrap: anywhere; }
.product-detail-lead { max-width: 58ch; margin: 18px 0 22px; color: var(--ink-soft); font-size: 16px; }
.product-detail-facts { margin: 0 0 22px; }
.product-detail-facts div { display: grid; grid-template-columns: 82px 1fr; gap: 22px; padding: 11px 0; border-bottom: 1px solid var(--line); }
.product-detail-facts dt { color: var(--ink-soft); }
.product-detail-facts dd { margin: 0; color: var(--ink); font-weight: 600; overflow-wrap: anywhere; }
.product-document { display: flex; align-items: center; justify-content: space-between; gap: 20px; margin: 0 0 22px; border-block: 1px solid var(--line); padding: 16px 0; }
.product-document > div { display: grid; gap: 2px; }
.product-document strong { font-size: 15px; }
.product-document span { color: var(--ink-soft); font-size: 13px; }
.product-manual-link { display: inline-flex; min-height: 40px; align-items: center; gap: 8px; border-bottom: 1px solid var(--ink); color: var(--ink); font-weight: 600; text-decoration: none; white-space: nowrap; }
.product-manual-link::after { width: 7px; height: 7px; border-top: 1.5px solid currentColor; border-right: 1.5px solid currentColor; content: ""; transform: rotate(45deg); transition: transform 160ms ease; }
.product-manual-link:hover { border-color: var(--accent); color: var(--accent); }
.product-manual-link:hover::after { transform: translateX(3px) rotate(45deg); }
.product-detail-notice { border-radius: 10px; padding: 13px 16px; background: var(--accent-soft); color: var(--ink-soft); font-size: 14px; }
.product-detail-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 20px; }
.product-description-section { border-top: 1px solid var(--line); padding-block: 68px; }
.product-description-grid { display: grid; grid-template-columns: .72fr 1.28fr; gap: clamp(46px, 8vw, 120px); }
.product-description-grid h2 { margin: 0; font-size: clamp(30px, 3.6vw, 46px); letter-spacing: -0.03em; line-height: 1.12; }
.product-description-copy { color: var(--ink-soft); font-size: 17px; }
.product-description-copy p { max-width: 65ch; margin: 0 0 18px; }
.product-neighbors { display: flex; justify-content: space-between; gap: 24px; padding-block: 34px; border-top: 1px solid var(--line); }
.product-neighbors a { color: var(--accent); font-weight: 600; text-decoration: none; }

@media (max-width: 1080px) {
  .header-actions .text-button { display: none; }
  .primary-nav { gap: 18px; }
  .carousel-layout { grid-template-columns: minmax(0, .9fr) minmax(400px, 1.1fr); }
  .product-detail { grid-template-columns: 1fr 1fr; }
  .hero { grid-template-columns: .88fr 1.12fr; }
  .hero-stage { min-height: 500px; }
  .featured-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .product-grid { grid-template-columns: repeat(4, minmax(0, 1fr)); }
  .category-composition { grid-template-columns: 1.2fr 1fr; }
  .category-reagents { grid-column: 1 / -1; min-height: 210px; }
  .partner-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
}

@media (max-width: 820px) {
  :root { --shell: min(100% - 32px, 720px); }
  .site-header { height: 66px; }
  .header-inner { gap: 12px; }
  .menu-button { display: block; min-height: 44px; margin-left: auto; padding: 8px 10px; border: 1px solid var(--line); border-radius: 8px; }
  .primary-nav { position: absolute; left: 16px; right: 16px; top: 72px; display: none; flex-direction: column; align-items: stretch; gap: 0; margin: 0; border-radius: var(--radius-card); padding: 10px; background: var(--surface-raised); box-shadow: var(--shadow); }
  .primary-nav.is-open { display: flex; }
  .primary-nav a { padding: 12px; }
  .primary-nav a[aria-current="page"]::after { display: none; }
  .header-actions .button { display: none; }
  .home-brand-row { min-height: 62px; }
  .home-contact-shortcuts > a { display: none; }
  .home-contact-shortcuts .button { display: inline-flex; }
  .priority-search { padding-block: 18px 20px; }
  .home-category-nav { min-height: 46px; gap: 26px; }
  .product-mega-menu { max-height: 60dvh; overflow-y: auto; overscroll-behavior: contain; }
  .product-mega-menu-inner { width: 100%; padding: 24px 16px 30px; }
  .product-menu-heading { align-items: flex-start; }
  .product-menu-layout { grid-template-columns: minmax(180px, 220px) minmax(0, 1fr); }
  .product-secondary-area { padding: 24px; }
  .product-secondary-links { grid-template-columns: repeat(2, minmax(0, 1fr)); gap-inline: 20px; }
  .carousel-track, .carousel-layout { min-height: 720px; }
  .carousel-layout { grid-template-columns: 1fr; align-content: center; gap: 32px; padding-block: 42px; }
  .carousel-copy h1, .carousel-copy h2 { max-width: 13ch; font-size: clamp(40px, 8.8vw, 58px); }
  .carousel-visual { min-height: 330px; }
  .hero { min-height: auto; grid-template-columns: 1fr; gap: 42px; padding-block: 50px 70px; }
  .hero h1 { max-width: none; font-size: clamp(50px, 14vw, 76px); }
  .hero-stage { min-height: 520px; }
  .home-search { grid-template-columns: 1fr; }
  .category-composition { grid-template-columns: 1fr; }
  .category-reagents { grid-column: auto; }
  .category-block { min-height: 220px; }
  .featured-grid, .product-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .service-section, .story-layout, .about-intro, .about-story, .principles-layout, .contact-guide, .page-hero, .contact-hero, .authorization-heading, .partner-group-heading { grid-template-columns: 1fr; }
  .service-intro { position: static; }
  .service-path li { grid-template-columns: 1fr; gap: 8px; }
  .authorization-grid { grid-template-columns: 1fr; }
  .authorization-preview { height: 380px; }
  .authorization-grid--all .authorization-preview { height: 420px; }
  .partners-link-section { align-items: flex-start; flex-direction: column; }
  .partners-hero { min-height: 410px; }
  .partner-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .story-image { max-width: 620px; }
  .contact-band, .map-band-inner { align-items: flex-start; flex-direction: column; }
  .contact-actions { justify-content: flex-start; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .footer-grid > div:first-child { grid-column: 1 / -1; }
  .footer-grid > .footer-wechat { justify-self: start; }
  .catalog-toolbar { grid-template-columns: 1fr 1fr; }
  .reset-button { grid-column: 1 / -1; justify-self: start; }
  .product-dialog-layout, .consult-layout { grid-template-columns: 1fr; }
  .dialog-gallery > img { height: 360px; }
  .dialog-copy { padding: 38px 28px; }
  .about-hero .page-hero-image { width: min(100%, 480px); justify-self: start; }
  .about-story { gap: 34px; }
  .contact-hero { padding-top: 52px; }
  .wechat-card { justify-self: start; }
  .product-detail { grid-template-columns: 1fr; gap: 22px; padding-bottom: 64px; }
  .product-detail-copy { padding-top: 8px; }
  .product-main-image, .product-main-image img { min-height: 440px; height: 440px; }
  .product-description-grid { grid-template-columns: 1fr; gap: 24px; }
}

@media (max-width: 560px) {
  :root { --shell: calc(100% - 28px); }
  body { font-size: 15px; }
  .brand-mark { width: 40px; }
  .home-contact-shortcuts { gap: 8px; }
  .priority-search-control { grid-template-columns: 1fr; }
  .priority-search-control .button { width: 100%; min-height: 50px; }
  .priority-search-control input { min-height: 52px; font-size: 16px; }
  .product-menu-heading { display: block; }
  .product-menu-all { display: inline-block; margin-top: 12px; }
  .product-menu-layout { display: block; min-height: 0; }
  .product-primary-list { display: flex; gap: 8px; overflow-x: auto; border-right: 0; border-bottom: 1px solid var(--line); padding: 12px 0; scrollbar-width: thin; }
  .product-primary-list button { flex: 0 0 auto; width: auto; min-height: 44px; border: 1px solid var(--line); border-radius: 9px; padding: 9px 14px; color: var(--ink); white-space: nowrap; }
  .product-primary-list button::after { display: none; }
  .product-primary-list button[aria-selected="true"] { border-color: var(--ink); }
  .product-secondary-area { padding: 22px 0 4px; }
  .product-secondary-links { grid-template-columns: 1fr; }
  .product-secondary-links a { min-height: 48px; }
  .carousel-track, .carousel-layout { min-height: 620px; }
  .carousel-layout { gap: 26px; padding-block: 34px; }
  .carousel-copy h1, .carousel-copy h2 { font-size: clamp(36px, 10.5vw, 46px); }
  .carousel-copy p { margin: 16px 0 20px; font-size: 16px; }
  .carousel-visual, .service-photo img { min-height: 270px; height: 270px; }
  .carousel-controls { min-height: 54px; }
  .carousel-buttons button { padding-inline: 9px; font-size: 13px; }
  .hero { gap: 24px; padding-block: 34px 36px; }
  .hero h1, .page-hero-copy h1, .contact-copy h1 { font-size: clamp(44px, 14vw, 64px); }
  .hero-summary { font-size: 17px; }
  .hero-stage { min-height: 290px; border-radius: 28% 12% 24% 10%; }
  .stage-note strong { font-size: 30px; }
  .stage-product-main { width: 65%; height: 65%; }
  .stage-product-top { width: 34%; height: 32%; }
  .stage-product-bottom { width: 36%; height: 34%; }
  .search-composition { grid-template-columns: 1fr; }
  .featured-grid, .product-grid { grid-template-columns: 1fr; }
  .product-card h3, .product-spec { min-height: auto; }
  .contact-band { width: calc(100% - 28px); }
  .contact-actions, .contact-actions .button { width: 100%; }
  .footer-grid { grid-template-columns: 1fr; }
  .footer-grid > div:first-child { grid-column: auto; }
  .footer-grid > .footer-wechat { align-items: flex-start; }
  .footer-wechat-copy strong, .footer-wechat-copy span { text-align: left; }
  .footer-bottom { flex-direction: column; }
  .catalog-hero-inner { align-items: flex-start; flex-direction: column; }
  .catalog-count { align-items: flex-start; }
  .catalog-toolbar { grid-template-columns: 1fr; }
  .reset-button { grid-column: auto; }
  .catalog-status { flex-direction: column; gap: 2px; }
  .dialog-gallery { padding: 22px; }
  .dialog-gallery > img { height: 290px; }
  .dialog-actions .button { width: 100%; }
  .consult-copy { padding: 34px 24px; }
  .about-company-media, .about-recognition-media { grid-template-columns: 1fr; gap: 28px; }
  .principles-list div { grid-template-columns: 1fr; gap: 6px; }
  .client-cloud { display: grid; grid-template-columns: 1fr 1fr; }
  .authorization-preview { height: 290px; padding: 14px; }
  .authorization-grid--all .authorization-preview { height: 320px; }
  .authorization-item--portrait .authorization-preview img { height: 84%; max-width: 76%; }
  .partner-grid { grid-template-columns: 1fr; gap: 30px; }
  .partner-logo { height: 138px; padding: 22px; }
  .partner-logo img { height: 94px; }
  .direct-contact-list a { grid-template-columns: 1fr; gap: 5px; }
  .contact-guide ul { grid-template-columns: 1fr; }
  .product-main-image, .product-main-image img { min-height: 330px; height: 330px; }
  .product-document { align-items: flex-start; flex-direction: column; gap: 10px; }
  .product-detail-copy h1 { font-size: clamp(34px, 10vw, 46px); }
  .product-detail-actions, .product-detail-actions .button { width: 100%; }
  .product-neighbors { flex-direction: column; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior: auto !important; animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; }
}

@media (prefers-reduced-transparency: reduce) {
  .site-header { background: var(--surface); backdrop-filter: none; }
  .product-dialog::backdrop, .consult-dialog::backdrop { backdrop-filter: none; }
}