:root {
  --brand: #074f96;
  --brand-dark: #043362;
  --brand-deep: #06294b;
  --ink: #17212b;
  --muted: #66717d;
  --line: #dce2e7;
  --soft: #f3f5f6;
  --white: #ffffff;
  --accent: #d8a531;
  --success: #20845d;
  --shell: 1240px;
  --header-height: 138px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 140px; }
body {
  margin: 0;
  color: var(--ink);
  background: var(--white);
  font-family: "Microsoft YaHei", "PingFang SC", "Noto Sans CJK SC", Arial, sans-serif;
  font-size: 16px;
  line-height: 1.6;
  letter-spacing: 0;
}
body.is-locked { overflow: hidden; }
button, input, select, textarea { font: inherit; letter-spacing: 0; }
button, a { -webkit-tap-highlight-color: transparent; }
a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; }
button { color: inherit; }

.shell { width: min(var(--shell), calc(100% - 48px)); margin: 0 auto; }
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}
.skip-link { position: fixed; left: 16px; top: -60px; z-index: 200; padding: 10px 16px; background: var(--white); color: var(--brand); }
.skip-link:focus { top: 12px; }

.site-header { position: relative; z-index: 30; background: var(--white); }
.utility-bar { background: var(--brand-deep); color: #dbe9f6; font-size: 12px; }
.utility-inner { height: 30px; display: flex; align-items: center; justify-content: flex-end; gap: 28px; }
.utility-inner span { display: inline-flex; align-items: center; gap: 7px; white-space: nowrap; }
.utility-inner svg { width: 14px; height: 14px; color: #7db3e4; }
.header-main { height: 72px; display: grid; grid-template-columns: 245px minmax(260px, 1fr) auto auto; align-items: center; justify-content: space-between; gap: 24px; }
.brand { display: inline-flex; align-items: center; gap: 14px; width: fit-content; }
.brand img { width: 112px; height: 30px; object-fit: contain; }
.brand-copy { padding-left: 14px; border-left: 1px solid var(--line); color: #536170; font-size: 13px; white-space: nowrap; }
.site-search { height: 40px; display: grid; grid-template-columns: 38px 1fr auto; align-items: center; border: 1px solid #cbd3da; background: #fff; }
.site-search:focus-within { border-color: var(--brand); box-shadow: 0 0 0 3px rgba(7, 79, 150, .1); }
.site-search svg { width: 17px; margin-left: 13px; color: #77838f; }
.site-search input { width: 100%; min-width: 0; border: 0; outline: 0; color: var(--ink); background: transparent; }
.site-search button { height: 100%; padding: 0 18px; border: 0; background: var(--brand); color: #fff; cursor: pointer; }
.catalog-link { display: inline-flex; align-items: center; justify-content: center; gap: 8px; color: var(--brand); font-size: 14px; font-weight: 700; white-space: nowrap; }
.catalog-link svg { width: 19px; }
.language-toggle { height: 34px; display: inline-flex; align-items: center; gap: 6px; padding: 0 10px; border: 1px solid var(--line); border-radius: 2px; background: #fff; color: #5c6872; font-size: 12px; font-weight: 800; cursor: pointer; white-space: nowrap; }
.language-toggle:hover { border-color: var(--brand); color: var(--brand); }
.language-toggle [data-language-option] { transition: color .2s ease; }
.language-toggle [data-language-option].is-current { color: var(--brand); }
.language-divider { color: #aeb7bf; font-weight: 400; }
.nav-band { border-top: 1px solid #eef1f3; border-bottom: 1px solid var(--line); }
.primary-nav { height: 36px; display: flex; align-items: stretch; gap: 38px; }
.primary-nav a { position: relative; display: inline-flex; align-items: center; color: #384654; font-size: 13px; font-weight: 700; }
.primary-nav a::after { content: ""; position: absolute; left: 0; right: 0; bottom: -1px; height: 2px; background: var(--brand); transform: scaleX(0); transition: transform .2s ease; }
.primary-nav a:hover::after, .primary-nav a.is-active::after { transform: scaleX(1); }
.menu-toggle, .search-toggle { display: none; }
.icon-button { width: 40px; height: 40px; display: inline-grid; place-items: center; padding: 0; border: 0; background: transparent; cursor: pointer; }
.icon-button svg { width: 22px; height: 22px; }
.menu-toggle, .search-toggle { display: none; }

.hero { position: relative; height: clamp(560px, 69vh, 750px); min-height: 560px; overflow: hidden; color: #fff; background: #496a80; }
.hero-media { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; object-position: center; }
.hero-shade { position: absolute; inset: 0; background: rgba(3, 26, 48, .57); }
.hero-inner { position: relative; z-index: 2; height: 100%; display: flex; flex-direction: column; align-items: flex-start; justify-content: center; padding-bottom: 38px; }
.eyebrow { margin: 0 0 16px; color: #c9e1f6; font-size: 12px; font-weight: 800; letter-spacing: 0; text-transform: uppercase; }
.eyebrow::before { content: ""; display: inline-block; width: 30px; height: 2px; margin: 0 10px 3px 0; background: var(--accent); }
.eyebrow-dark { color: var(--brand); }
.hero h1 { max-width: 780px; margin: 0; font-size: clamp(38px, 5vw, 66px); line-height: 1.16; font-weight: 800; text-shadow: 0 2px 18px rgba(0, 0, 0, .15); }
.hero-lead { max-width: 690px; margin: 24px 0 0; color: #e6edf3; font-size: 17px; }
.hero-points { display: flex; gap: 26px; margin: 24px 0 0; padding: 0; list-style: none; color: #f2f6f9; font-size: 14px; }
.hero-points li { display: flex; align-items: center; gap: 7px; }
.hero-points svg { width: 17px; color: #79c7a8; }
.hero-actions { display: flex; gap: 12px; margin-top: 34px; }
.button { min-height: 44px; display: inline-flex; align-items: center; justify-content: center; gap: 9px; padding: 0 20px; border: 1px solid transparent; border-radius: 3px; font-size: 14px; font-weight: 800; cursor: pointer; transition: background .2s ease, border-color .2s ease, color .2s ease, transform .2s ease; }
.button:hover { transform: translateY(-1px); }
.button svg { width: 17px; height: 17px; }
.button-primary { background: var(--brand); color: #fff; }
.button-primary:hover { background: #0862b7; }
.button-ghost { border-color: rgba(255, 255, 255, .65); color: #fff; background: rgba(3, 30, 54, .2); }
.button-ghost:hover { border-color: #fff; background: rgba(255, 255, 255, .1); }
.button-outline { border-color: #aeb9c3; background: #fff; color: var(--ink); }
.button-outline:hover { border-color: var(--brand); color: var(--brand); }
.button-light { background: #fff; color: var(--brand-deep); }
.hero-scroll { position: absolute; z-index: 2; left: 50%; bottom: 18px; transform: translateX(-50%); display: flex; flex-direction: column; align-items: center; gap: 1px; color: rgba(255, 255, 255, .8); font-size: 11px; }
.hero-scroll svg { width: 19px; }

.quick-band { position: relative; z-index: 4; background: #fff; border-bottom: 1px solid var(--line); }
.quick-grid { display: grid; grid-template-columns: repeat(4, 1fr); }
.quick-grid button { min-width: 0; height: 102px; display: grid; grid-template-columns: 34px 1fr 20px; align-items: center; gap: 13px; padding: 0 22px; border: 0; border-right: 1px solid var(--line); background: #fff; text-align: left; cursor: pointer; }
.quick-grid button:first-child { border-left: 1px solid var(--line); }
.quick-grid button:hover { background: var(--soft); }
.quick-number { align-self: start; margin-top: 30px; color: var(--brand); font-size: 11px; font-weight: 800; }
.quick-grid strong, .quick-grid small { display: block; }
.quick-grid strong { font-size: 15px; }
.quick-grid small { color: var(--muted); font-size: 12px; }
.quick-grid svg { width: 17px; color: #85909a; }

.section { padding: 92px 0; }
.section-heading { margin-bottom: 40px; }
.split-heading { display: grid; grid-template-columns: minmax(0, 1.15fr) minmax(300px, .7fr); align-items: end; gap: 70px; }
.section-heading h2, .application-intro h2, .catalog-content h2, .about-copy h2, .contact-band h2 { margin: 0; font-size: clamp(29px, 3vw, 40px); line-height: 1.25; }
.section-heading > p { margin: 0 0 4px; color: var(--muted); }
.filter-row { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 24px; }
.filter-button { min-height: 36px; padding: 0 17px; border: 1px solid #cbd3d9; border-radius: 2px; background: #fff; color: #53606c; font-size: 13px; font-weight: 700; cursor: pointer; }
.filter-button:hover, .filter-button.is-active { border-color: var(--brand); background: var(--brand); color: #fff; }
.product-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 22px; }
.product-card { min-width: 0; overflow: hidden; border: 1px solid var(--line); border-radius: 4px; background: #fff; cursor: pointer; transition: border-color .2s ease, box-shadow .2s ease, transform .2s ease; }
.product-card:hover { transform: translateY(-3px); border-color: #a9bac8; box-shadow: 0 14px 34px rgba(26, 44, 61, .1); }
.product-card-media { position: relative; aspect-ratio: 4 / 3; overflow: hidden; background: #d8dde0; }
.product-card-media img { width: 100%; height: 100%; object-fit: cover; transition: transform .45s ease; }
.product-card:hover .product-card-media img { transform: scale(1.035); }
.product-card-index { position: absolute; left: 14px; top: 14px; min-width: 34px; height: 26px; display: inline-grid; place-items: center; background: rgba(5, 38, 68, .9); color: #fff; font-size: 11px; font-weight: 800; }
.product-card-body { min-height: 126px; display: grid; grid-template-columns: 1fr auto; gap: 16px; padding: 20px; }
.product-card h3 { margin: 0 0 4px; font-size: 19px; line-height: 1.3; }
.product-card p { margin: 0; color: var(--muted); font-size: 13px; }
.product-card-action { width: 36px; height: 36px; display: grid; place-items: center; align-self: center; border: 1px solid var(--line); color: var(--brand); }
.product-card-action svg { width: 16px; }
.empty-state { padding: 60px 0; text-align: center; color: var(--muted); }

.application-band { padding: 88px 0; background: var(--brand-deep); color: #fff; }
.application-layout { display: grid; grid-template-columns: .78fr 1.22fr; gap: 100px; align-items: start; }
.application-intro > p:not(.eyebrow) { max-width: 460px; margin: 20px 0 25px; color: #c3d3df; }
.text-link { display: inline-flex; align-items: center; gap: 9px; color: var(--brand); font-size: 14px; font-weight: 800; }
.text-link svg { width: 17px; }
.application-band .text-link { color: #fff; }
.application-steps { margin: 0; padding: 0; list-style: none; border-top: 1px solid rgba(255, 255, 255, .18); }
.application-steps li { display: grid; grid-template-columns: 58px 1fr; gap: 20px; padding: 26px 0; border-bottom: 1px solid rgba(255, 255, 255, .18); }
.step-index { color: #68aee7; font-size: 12px; font-weight: 800; }
.application-steps h3 { margin: 0 0 5px; font-size: 19px; }
.application-steps p { margin: 0; color: #bdccd8; font-size: 14px; }

.media-section { background: var(--soft); }
.video-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 16px; }
.video-card { position: relative; min-width: 0; aspect-ratio: 16 / 10; overflow: hidden; padding: 0; border: 0; border-radius: 4px; background: #243441; color: #fff; cursor: pointer; text-align: left; }
.video-card img { width: 100%; height: 100%; object-fit: cover; opacity: .72; transition: opacity .2s ease, transform .35s ease; }
.video-card:hover img { opacity: .58; transform: scale(1.035); }
.video-overlay { position: absolute; inset: 0; display: flex; flex-direction: column; justify-content: space-between; padding: 16px; background: rgba(6, 26, 42, .18); }
.video-play { width: 42px; height: 42px; display: grid; place-items: center; align-self: center; margin-top: 32px; border: 1px solid rgba(255, 255, 255, .75); border-radius: 50%; background: rgba(4, 38, 68, .56); }
.video-play svg { width: 18px; margin-left: 2px; fill: currentColor; }
.video-label { font-size: 13px; font-weight: 800; text-shadow: 0 1px 5px rgba(0,0,0,.4); }
.center-action { display: flex; justify-content: center; margin-top: 34px; }

.catalog-band { display: grid; grid-template-columns: minmax(0, 1.04fr) minmax(460px, .96fr); min-height: 560px; background: #0b3559; color: #fff; }
.catalog-band > img { width: 100%; height: 100%; min-height: 560px; object-fit: cover; }
.catalog-content { display: flex; flex-direction: column; align-items: flex-start; justify-content: center; padding: 70px clamp(40px, 7vw, 110px); }
.catalog-content > p:not(.eyebrow) { max-width: 560px; margin: 20px 0 24px; color: #ccdae5; }
.catalog-meta { display: flex; flex-wrap: wrap; gap: 24px; margin-bottom: 32px; color: #d8e2e9; font-size: 13px; }
.catalog-meta span { display: inline-flex; align-items: center; gap: 8px; }
.catalog-meta svg { width: 17px; color: #79b3df; }

.about-layout { display: grid; grid-template-columns: minmax(0, .85fr) minmax(520px, 1.15fr); gap: 90px; align-items: center; }
.about-copy > p:not(.eyebrow) { margin: 22px 0; color: var(--muted); }
.stat-grid { margin: 0; display: grid; grid-template-columns: 1fr 1fr; border-top: 1px solid var(--line); border-left: 1px solid var(--line); }
.stat-grid div { min-height: 150px; display: flex; flex-direction: column; justify-content: center; padding: 25px 34px; border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.stat-grid dt { color: var(--brand); font-size: 38px; line-height: 1.1; font-weight: 800; }
.stat-grid dd { margin: 8px 0 0; color: var(--muted); font-size: 13px; }
.contact-band { padding: 88px 0; background: var(--brand-deep); color: #fff; }
.contact-layout { display: grid; grid-template-columns: minmax(0, .78fr) minmax(540px, 1.22fr); align-items: start; gap: 90px; }
.contact-intro { position: sticky; top: 40px; }
.contact-band .eyebrow { margin-bottom: 10px; }
.contact-band h2 { max-width: 500px; font-size: 37px; }
.contact-intro > p:not(.eyebrow) { max-width: 510px; margin: 18px 0 0; color: #c8d7e2; }
.contact-points { display: grid; gap: 14px; margin: 32px 0 0; padding: 26px 0 0; border-top: 1px solid rgba(255, 255, 255, .18); list-style: none; }
.contact-points li { display: flex; align-items: flex-start; gap: 11px; color: #e5edf3; font-size: 13px; }
.contact-points svg { flex: 0 0 18px; width: 18px; color: #75c7a5; }
.contact-form { padding: 32px; border-top: 3px solid var(--accent); background: #fff; color: var(--ink); box-shadow: 0 18px 50px rgba(0, 0, 0, .18); }
.contact-form label { display: grid; gap: 7px; margin-bottom: 17px; color: #3a4854; font-size: 13px; font-weight: 700; }
.contact-form label > span::after { content: " *"; color: #b3261e; }
.contact-form label:has(#contactCompany) > span::after, .contact-form label:has(#contactCountry) > span::after { content: ""; }
.contact-form input, .contact-form select, .contact-form textarea { width: 100%; min-height: 44px; padding: 10px 12px; border: 1px solid #bdc8d1; border-radius: 2px; outline: 0; background: #fff; color: var(--ink); font: inherit; font-weight: 400; resize: vertical; }
.contact-form textarea { min-height: 124px; }
.contact-form input:focus, .contact-form select:focus, .contact-form textarea:focus { border-color: var(--brand); box-shadow: 0 0 0 3px rgba(7, 79, 150, .09); }
.contact-form input[aria-invalid="true"] { border-color: #b3261e; box-shadow: 0 0 0 3px rgba(179, 38, 30, .08); }
.contact-form .button { min-width: 170px; }
.contact-form .button:disabled { opacity: .66; cursor: wait; transform: none; }
.form-note { margin: -2px 0 5px; color: var(--muted); font-size: 11px; }
.field-error { display: block; margin-top: -1px; color: #b3261e; font-size: 11px; font-weight: 600; line-height: 1.45; }
.field-error:empty { display: none; }
.form-honeypot { position: absolute !important; left: -10000px !important; width: 1px !important; height: 1px !important; overflow: hidden !important; }
.is-spinning { animation: spin .8s linear infinite; }
@keyframes spin { to { transform: rotate(360deg); } }

.site-footer { padding: 62px 0 18px; background: #101b24; color: #c7d0d7; }
.footer-grid { display: grid; grid-template-columns: 1.5fr repeat(3, 1fr); gap: 70px; padding-bottom: 52px; }
.footer-brand img { width: 128px; height: 35px; object-fit: contain; filter: brightness(0) invert(1); opacity: .9; }
.footer-brand p { margin: 18px 0 0; color: #87949e; font-size: 13px; }
.footer-grid h2 { margin: 0 0 16px; color: #fff; font-size: 14px; }
.footer-grid a { display: block; width: fit-content; margin-top: 9px; color: #929fa9; font-size: 13px; }
.footer-grid a:hover { color: #fff; }
.footer-bottom { min-height: 42px; display: flex; align-items: flex-end; justify-content: space-between; gap: 20px; border-top: 1px solid #2d3942; color: #72808b; font-size: 11px; }

dialog { padding: 0; border: 0; }
dialog::backdrop { background: rgba(3, 14, 24, .78); backdrop-filter: blur(2px); }
.category-dialog { width: min(1120px, calc(100% - 36px)); max-height: calc(100vh - 44px); margin: auto; border-radius: 4px; background: #fff; color: var(--ink); }
.dialog-header { position: sticky; z-index: 3; top: 0; display: flex; align-items: flex-start; justify-content: space-between; gap: 30px; padding: 28px 32px 22px; border-bottom: 1px solid var(--line); background: #fff; }
.dialog-header .eyebrow { margin-bottom: 7px; }
.dialog-header h2 { margin: 0; font-size: 27px; }
.dialog-header p:last-child { margin: 5px 0 0; color: var(--muted); font-size: 13px; }
.dialog-close { flex: 0 0 40px; border: 1px solid var(--line); }
.dialog-gallery { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 12px; padding: 24px 32px 34px; }
.gallery-item { min-width: 0; padding: 0; overflow: hidden; border: 1px solid var(--line); border-radius: 3px; background: #fff; cursor: zoom-in; }
.gallery-item img { width: 100%; aspect-ratio: 4 / 3; object-fit: cover; }
.gallery-item span { display: block; padding: 8px 10px; color: #596673; font-size: 11px; text-align: left; }
.viewer-dialog { width: 100vw; height: 100vh; max-width: none; max-height: none; margin: 0; background: rgba(4, 13, 21, .96); color: #fff; }
.viewer-dialog figure { width: 100%; height: 100%; margin: 0; display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 12px; padding: 56px 110px 34px; }
.viewer-dialog figure img { max-width: 100%; max-height: calc(100vh - 110px); object-fit: contain; }
.viewer-dialog figcaption { color: #c4ced6; font-size: 13px; }
.viewer-close, .video-close { position: fixed; z-index: 2; top: 18px; right: 22px; color: #fff; background: rgba(255,255,255,.08); }
.viewer-nav { position: fixed; z-index: 2; top: 50%; transform: translateY(-50%); color: #fff; background: rgba(255,255,255,.08); }
.viewer-prev { left: 24px; }
.viewer-next { right: 24px; }
.video-dialog { width: min(1040px, calc(100% - 36px)); margin: auto; background: #09131c; color: #fff; }
.video-dialog video { display: block; width: 100%; max-height: calc(100vh - 100px); background: #000; }
.video-dialog p { margin: 0; padding: 15px 20px; color: #c9d1d8; font-size: 13px; }
.form-pair { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.form-status { min-height: 24px; margin: 0 0 12px; font-size: 13px; line-height: 1.5; }
.form-status:not(:empty) { padding: 11px 13px; border-left: 3px solid currentColor; }
.form-status.is-success { color: var(--success); background: #edf8f3; }
.form-status.is-error { color: #b3261e; background: #fff2f1; }

@media (max-width: 1024px) {
  :root { --header-height: 104px; }
  .shell { width: min(var(--shell), calc(100% - 36px)); }
  .header-main { grid-template-columns: 220px 1fr auto auto; gap: 14px; }
  .catalog-link span, .brand-copy { display: none; }
  .catalog-link { width: 40px; height: 40px; border: 1px solid var(--line); }
  .language-toggle { padding: 0 8px; }
  .primary-nav { gap: 25px; }
  .hero { height: 650px; }
  .quick-grid button { padding: 0 14px; gap: 8px; }
  .product-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .application-layout { gap: 55px; }
  .video-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .catalog-band { grid-template-columns: 1fr 1fr; }
  .about-layout { grid-template-columns: 1fr 1fr; gap: 55px; }
  .footer-grid { gap: 35px; }
}

@media (max-width: 760px) {
  html { scroll-padding-top: 72px; }
  .shell { width: min(100% - 28px, var(--shell)); }
  .utility-inner { justify-content: space-between; gap: 14px; }
  .utility-hide-mobile { display: none !important; }
  .header-main { height: 66px; grid-template-columns: 1fr auto auto auto; gap: 6px; }
  .brand img { width: 92px; height: 26px; }
  .site-search { position: absolute; top: 96px; left: 14px; right: 14px; z-index: 10; display: none; box-shadow: 0 12px 35px rgba(23, 33, 43, .18); }
  .site-search.is-open { display: grid; }
  .catalog-link { display: none; }
  .language-toggle { display: inline-flex; height: 34px; padding: 0 6px; gap: 4px; font-size: 11px; }
  .menu-toggle, .search-toggle { display: inline-grid; }
  .nav-band { position: absolute; top: 96px; left: 0; right: 0; border-top: 0; }
  .primary-nav { display: none; width: 100%; height: auto; padding: 8px 14px 16px; background: #fff; box-shadow: 0 18px 30px rgba(27, 45, 61, .16); }
  .primary-nav.is-open { display: grid; }
  .primary-nav a { min-height: 42px; padding: 0 8px; border-bottom: 1px solid #edf0f2; }
  .primary-nav a::after { display: none; }
  .hero { height: 620px; min-height: 620px; }
  .hero-media { object-position: 58% center; }
  .hero-inner { justify-content: flex-end; padding-bottom: 80px; }
  .hero h1 { font-size: 38px; }
  .hero-lead { font-size: 15px; }
  .hero-points { flex-wrap: wrap; gap: 8px 18px; }
  .hero-actions { width: 100%; }
  .hero-actions .button { flex: 1; padding: 0 12px; }
  .hero-scroll { display: none; }
  .quick-grid { grid-template-columns: 1fr 1fr; }
  .quick-grid button { height: 86px; border-bottom: 1px solid var(--line); }
  .quick-grid button:nth-child(3) { border-left: 1px solid var(--line); }
  .section { padding: 70px 0; }
  .split-heading { grid-template-columns: 1fr; gap: 18px; }
  .section-heading { margin-bottom: 30px; }
  .product-grid { gap: 14px; }
  .product-card-body { min-height: 112px; padding: 16px; }
  .product-card h3 { font-size: 17px; }
  .application-layout { grid-template-columns: 1fr; gap: 45px; }
  .catalog-band { grid-template-columns: 1fr; }
  .catalog-band > img { min-height: 380px; max-height: 440px; }
  .catalog-content { padding: 58px 28px 64px; }
  .about-layout { grid-template-columns: 1fr; gap: 45px; }
  .contact-layout { grid-template-columns: 1fr; gap: 38px; }
  .contact-intro { position: static; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .footer-brand { grid-column: 1 / -1; }
  .footer-bottom { align-items: flex-start; flex-direction: column; justify-content: center; padding: 16px 0; }
  .dialog-gallery { grid-template-columns: repeat(2, minmax(0, 1fr)); padding: 18px; }
  .dialog-header { padding: 22px 18px 18px; }
}

@media (max-width: 520px) {
  .hero h1 { font-size: 34px; }
  .hero-points { font-size: 12px; }
  .quick-grid button { grid-template-columns: 28px 1fr; }
  .quick-grid button svg { display: none; }
  .product-grid { grid-template-columns: 1fr; }
  .filter-row { flex-wrap: nowrap; overflow-x: auto; padding-bottom: 4px; }
  .filter-button { flex: 0 0 auto; }
  .video-grid { grid-template-columns: 1fr; }
  .stat-grid div { min-height: 125px; padding: 22px; }
  .stat-grid dt { font-size: 32px; }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 34px 22px; }
  .form-pair { grid-template-columns: 1fr; gap: 0; }
  .contact-band { padding: 66px 0; }
  .contact-form { padding: 24px 18px; }
  .contact-form .button { width: 100%; }
  .viewer-dialog figure { padding: 60px 15px 36px; }
  .viewer-nav { top: auto; bottom: 20px; transform: none; }
  .viewer-prev { left: 18px; }
  .viewer-next { right: 18px; }
}

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