:root {
  --ink: #0a1219;
  --ink-2: #15232e;
  --steel: #27465c;
  --steel-light: #8da6b6;
  --paper: #f4f5f2;
  --white: #ffffff;
  --muted: #687681;
  --line: #d8ddde;
  --accent: #d45e32;
  --accent-dark: #aa3f1e;
  --accent-soft: #f3dfd6;
  --shadow: 0 18px 55px rgba(6, 18, 27, 0.11);
  --radius: 4px;
  --max: 1240px;
  --header: 84px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: "Microsoft YaHei", "PingFang SC", "Noto Sans CJK SC", Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
}
body.menu-open { overflow: hidden; }
img, video { display: block; max-width: 100%; }
button, input, textarea { font: inherit; }
a { color: inherit; text-decoration: none; }
button { cursor: pointer; }
.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: 20px; top: -80px; z-index: 200;
  background: var(--white); color: var(--ink); padding: 12px 18px;
}
.skip-link:focus { top: 12px; }

.site-header {
  position: fixed; inset: 0 0 auto; z-index: 100;
  height: var(--header); color: var(--white);
  background: rgba(8, 17, 24, 0.86); border-bottom: 1px solid rgba(255,255,255,.12);
  backdrop-filter: blur(18px); transition: height .25s, background .25s, box-shadow .25s;
}
.site-header.scrolled { height: 70px; background: rgba(8,17,24,.97); box-shadow: 0 8px 30px rgba(0,0,0,.18); }
.header-inner { width: min(var(--max), calc(100% - 48px)); height: 100%; margin: auto; display: flex; align-items: center; gap: 34px; }
.brand { display: inline-flex; align-items: center; gap: 13px; flex: 0 0 auto; }
.brand-mark { position: relative; display: block; width: 48px; height: 38px; flex: 0 0 48px; isolation: isolate; }
.brand-mark::before {
  content: ""; position: absolute; inset: 3px 2px 4px 3px; z-index: -1;
  border: 1px solid rgba(174, 193, 203, .34); transform: skewX(-10deg);
}
.brand-mark::after {
  content: ""; position: absolute; left: 4px; right: 1px; bottom: 1px; height: 3px;
  background: linear-gradient(90deg, var(--accent) 0 48%, #9fb2be 48% 100%); transform: skewX(-18deg);
}
.brand-mark b {
  position: absolute; top: 3px; margin: 0; font-family: "Arial Black", "Bahnschrift", Arial, sans-serif;
  font-size: 28px; font-weight: 900; font-style: italic; line-height: 1; letter-spacing: -.12em;
  text-shadow: 0 2px 10px rgba(0, 0, 0, .24); transform: skewX(-7deg);
}
.brand-mark b:first-child { left: 2px; color: var(--accent); }
.brand-mark b:last-child { right: 4px; color: #c3d0d7; }
.brand-copy { display: grid; line-height: 1; }
.brand-copy strong { font-size: 18px; letter-spacing: .12em; }
.brand-copy small { margin-top: 7px; color: #9fb0bb; font-size: 8px; letter-spacing: .24em; }
.primary-nav { display: flex; align-items: stretch; justify-content: center; gap: 27px; height: 100%; margin-left: auto; }
.primary-nav > a, .dropdown-trigger { position: relative; display: flex; align-items: center; gap: 5px; color: #dbe3e7; font-size: 14px; white-space: nowrap; }
.primary-nav > a::after, .dropdown-trigger::after {
  content: ""; position: absolute; left: 0; right: 100%; bottom: 0; height: 3px;
  background: var(--accent); transition: right .25s;
}
.primary-nav > a:hover::after, .primary-nav > a.active::after,
.dropdown-trigger:hover::after, .dropdown-trigger.active::after { right: 0; }
.primary-nav > a:hover, .primary-nav > a.active, .dropdown-trigger:hover, .dropdown-trigger.active { color: #fff; }
.nav-dropdown { position: relative; display: flex; }
.dropdown-panel {
  position: absolute; top: calc(100% - 1px); left: 50%; width: 590px; padding: 14px;
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px;
  background: #fff; color: var(--ink); box-shadow: 0 25px 65px rgba(0,0,0,.24);
  opacity: 0; visibility: hidden; transform: translate(-50%, 12px); transition: .2s;
}
.nav-dropdown:hover .dropdown-panel, .nav-dropdown:focus-within .dropdown-panel { opacity: 1; visibility: visible; transform: translate(-50%,0); }
.dropdown-panel a { display: grid; grid-template-columns: 31px 1fr; padding: 17px 14px; border: 1px solid transparent; }
.dropdown-panel a:hover { border-color: var(--line); background: var(--paper); }
.dropdown-panel span { grid-row: span 2; color: var(--accent); font-size: 12px; }
.dropdown-panel strong { font-size: 15px; }
.dropdown-panel small { margin-top: 6px; color: var(--muted); font-size: 11px; }
.header-contact { flex: 0 0 auto; display: grid; padding-left: 22px; border-left: 1px solid rgba(255,255,255,.2); }
.header-contact span { color: #90a2ad; font-size: 10px; letter-spacing: .12em; }
.header-contact strong { margin-top: 4px; font-family: Arial, sans-serif; font-size: 15px; letter-spacing: .05em; }
.lang-switch { flex: 0 0 auto; display: flex; align-items: center; gap: 5px; padding: 4px; border: 1px solid rgba(255,255,255,.18); background: rgba(255,255,255,.04); }
.lang-switch span { color: #50636e; font-size: 10px; }
.lang-switch button { min-width: 29px; height: 28px; padding: 0 7px; color: #8396a1; border: 0; background: transparent; font: 700 10px/1 Arial, sans-serif; letter-spacing: .05em; transition: color .2s, background .2s; }
.lang-switch button:hover { color: #fff; }
.lang-switch button.active { color: #fff; background: var(--accent); }
.lang-switch button:focus-visible { outline: 2px solid #fff; outline-offset: 2px; }
.menu-toggle { display: none; width: 42px; height: 42px; margin-left: auto; padding: 10px; border: 0; background: transparent; }
.menu-toggle span { display: block; height: 2px; margin: 5px 0; background: #fff; transition: .2s; }

main { min-height: 70vh; }
.container { width: min(var(--max), calc(100% - 48px)); margin-inline: auto; }
.section { padding: 110px 0; }
.section-white { background: var(--white); }
.section-dark { color: var(--white); background: var(--ink); }
.eyebrow { display: inline-flex; align-items: center; gap: 12px; margin-bottom: 20px; color: var(--accent); font-size: 12px; font-weight: 700; letter-spacing: .25em; text-transform: uppercase; }
.eyebrow::before { content: ""; width: 34px; height: 2px; background: currentColor; }
.section-heading { display: flex; align-items: end; justify-content: space-between; gap: 40px; margin-bottom: 48px; }
.section-heading h2 { max-width: 710px; margin: 0; font-size: clamp(32px, 4vw, 52px); line-height: 1.16; letter-spacing: -.035em; }
.section-heading p { max-width: 440px; margin: 0; color: var(--muted); line-height: 1.9; }
.section-dark .section-heading p { color: #9eb0bb; }
.btn { display: inline-flex; align-items: center; justify-content: center; min-height: 52px; padding: 0 25px; border: 1px solid transparent; font-weight: 700; font-size: 14px; letter-spacing: .04em; transition: .2s; }
.btn-primary { color: #fff; background: var(--accent); }
.btn-primary:hover { background: var(--accent-dark); transform: translateY(-2px); }
.btn-outline { color: inherit; border-color: currentColor; background: transparent; }
.btn-outline:hover { color: #fff; border-color: var(--steel); background: var(--steel); }
.btn-light { color: var(--ink); background: #fff; }
.text-link { display: inline-flex; align-items: center; gap: 12px; color: var(--accent); font-size: 13px; font-weight: 700; }
.text-link::after { content: "→"; transition: transform .2s; }
.text-link:hover::after { transform: translateX(5px); }

/* Home */
.hero {
  position: relative; min-height: 820px; display: flex; align-items: center; overflow: hidden;
  color: #fff; background:
    radial-gradient(circle at 77% 38%, rgba(61,97,119,.32), transparent 29%),
    linear-gradient(115deg, #071018 0%, #0c1922 56%, #132a39 100%);
}
.hero::before { content: ""; position: absolute; inset: 0; opacity: .18; background-image: linear-gradient(rgba(255,255,255,.08) 1px, transparent 1px), linear-gradient(90deg, rgba(255,255,255,.08) 1px, transparent 1px); background-size: 62px 62px; mask-image: linear-gradient(90deg, #000, transparent 78%); }
.hero::after { content: ""; position: absolute; width: 430px; height: 430px; right: -220px; bottom: -180px; border: 80px solid rgba(212,94,50,.12); border-radius: 50%; }
.hero-inner { position: relative; z-index: 1; width: min(var(--max), calc(100% - 48px)); margin: auto; padding-top: var(--header); display: grid; grid-template-columns: 1.03fr .97fr; align-items: center; gap: 40px; }
.hero-copy { padding: 74px 0; }
.hero-kicker { display: flex; align-items: center; gap: 13px; margin-bottom: 26px; color: #a9bac4; font-size: 12px; letter-spacing: .26em; }
.hero-kicker::before { content: ""; width: 34px; height: 2px; background: var(--accent); }
.hero h1 { margin: 0; font-size: clamp(48px, 6.1vw, 78px); line-height: 1.06; letter-spacing: -.05em; }
.hero h1 span { display: block; color: #93a8b5; font-size: .58em; margin-top: 14px; letter-spacing: .02em; font-weight: 400; }
.hero-copy > p { max-width: 590px; margin: 29px 0 38px; color: #b7c4cb; font-size: 17px; line-height: 1.9; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 13px; }
.hero-visual { position: relative; min-height: 520px; display: flex; align-items: center; justify-content: center; }
.hero-image-wrap { position: relative; width: 88%; background: #fff; box-shadow: 0 38px 100px rgba(0,0,0,.36); transform: translateX(6%); }
.hero-image-wrap::before { content: ""; position: absolute; inset: -18px 18px 18px -18px; z-index: -1; border: 1px solid rgba(255,255,255,.25); }
.hero-image-wrap img { width: 100%; aspect-ratio: 1 / .86; object-fit: contain; }
.hero-image-tag { position: absolute; left: -42px; bottom: 34px; width: 155px; padding: 20px; color: #fff; background: var(--accent); }
.hero-image-tag strong { display: block; font: 700 36px/1 Arial; }
.hero-image-tag span { display: block; margin-top: 7px; font-size: 12px; letter-spacing: .12em; }
.hero-scroll { position: absolute; left: 30px; bottom: 30px; z-index: 2; color: #718894; writing-mode: vertical-rl; font-size: 9px; letter-spacing: .25em; }
.home-stats { position: relative; z-index: 4; margin-top: -55px; }
.stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); background: #fff; box-shadow: var(--shadow); }
.stat-item { padding: 31px 34px; border-right: 1px solid var(--line); }
.stat-item:last-child { border-right: 0; }
.stat-item strong { display: block; color: var(--steel); font: 700 34px/1 Arial; }
.stat-item strong em { color: var(--accent); font-size: 17px; font-style: normal; }
.stat-item span { display: block; margin-top: 10px; color: var(--muted); font-size: 12px; }
.category-grid { display: grid; grid-template-columns: 1.15fr .85fr .85fr; gap: 18px; }
.category-card { position: relative; min-height: 440px; overflow: hidden; color: #fff; background: #152630; }
.category-card img { width: 100%; height: 100%; object-fit: cover; transition: transform .6s; }
.category-card:first-child img { object-fit: contain; background: #f9f9f7; }
.category-card::after { content: ""; position: absolute; inset: 0; background: linear-gradient(180deg, transparent 38%, rgba(3,11,16,.94)); }
.category-card:hover img { transform: scale(1.05); }
.category-card-content { position: absolute; z-index: 2; inset: auto 30px 31px; }
.category-card-content small { display: block; margin-bottom: 10px; color: #a9bac4; font-size: 11px; letter-spacing: .18em; }
.category-card-content h3 { margin: 0 0 12px; font-size: 28px; }
.category-card-content p { min-height: 42px; margin: 0; color: #c2cdd3; font-size: 13px; line-height: 1.65; }
.category-arrow { position: absolute; top: 23px; right: 23px; z-index: 3; display: grid; place-items: center; width: 45px; height: 45px; border: 1px solid rgba(255,255,255,.42); font-size: 20px; transition: .2s; }
.category-card:hover .category-arrow { color: #fff; border-color: var(--accent); background: var(--accent); }
.product-showcase { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; }
.product-card { position: relative; display: flex; flex-direction: column; min-width: 0; background: #fff; border: 1px solid #e4e7e6; transition: .25s; }
.product-card:hover { transform: translateY(-7px); border-color: transparent; box-shadow: var(--shadow); }
.product-card-image { position: relative; aspect-ratio: 1.05; overflow: hidden; background: #fafafa; }
.product-card-image img { width: 100%; height: 100%; object-fit: contain; transition: transform .4s; }
.product-card:hover .product-card-image img { transform: scale(1.05); }
.product-card-image span { position: absolute; left: 16px; top: 16px; padding: 7px 10px; color: #fff; background: rgba(14,33,46,.86); font-size: 10px; letter-spacing: .12em; }
.product-card-body { flex: 1; padding: 23px; }
.product-card-body h3 { margin: 0 0 10px; font-size: 19px; }
.product-card-body p { margin: 0 0 18px; color: var(--muted); font-size: 13px; line-height: 1.8; }
.capability-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 80px; align-items: center; }
.capability-visual { position: relative; padding-left: 42px; }
.capability-visual img { width: 100%; background: #fff; }
.capability-visual::before { content: ""; position: absolute; inset: 34px auto -34px 0; width: 75%; border: 1px solid #415561; z-index: -1; }
.capability-label { position: absolute; left: 0; top: -28px; color: #526b7a; font: 700 72px/1 Arial; }
.capability-copy h2 { margin: 0 0 27px; font-size: clamp(36px, 4vw, 55px); line-height: 1.18; }
.capability-copy > p { margin: 0 0 35px; color: #a6b4bd; line-height: 1.9; }
.capability-list { display: grid; grid-template-columns: repeat(2, 1fr); gap: 22px; margin-bottom: 38px; }
.capability-list div { padding-top: 17px; border-top: 1px solid #334550; }
.capability-list strong { display: block; margin-bottom: 7px; }
.capability-list span { color: #8296a2; font-size: 12px; }
.cta-band { position: relative; overflow: hidden; padding: 84px 0; color: #fff; background: var(--accent); }
.cta-band::after { content: "HT"; position: absolute; right: -10px; top: -57px; color: rgba(255,255,255,.08); font: 900 230px/1 Arial; }
.cta-inner { position: relative; z-index: 1; display: flex; align-items: center; justify-content: space-between; gap: 35px; }
.cta-inner h2 { margin: 0 0 10px; font-size: clamp(30px, 4vw, 48px); }
.cta-inner p { margin: 0; color: #ffe6dc; }

/* Inner pages */
.page-hero { position: relative; padding: calc(var(--header) + 94px) 0 84px; overflow: hidden; color: #fff; background: linear-gradient(120deg, #08131b, #173244); }
.page-hero::after { content: ""; position: absolute; inset: 0; opacity: .15; background-image: linear-gradient(90deg, transparent 49%, rgba(255,255,255,.12) 50%); background-size: 110px 100%; transform: skewX(-15deg); }
.page-hero .container { position: relative; z-index: 2; }
.breadcrumbs { display: flex; align-items: center; gap: 10px; margin-bottom: 32px; color: #92a7b4; font-size: 12px; }
.breadcrumbs span { color: #5f7786; }
.page-hero h1 { margin: 0; font-size: clamp(42px, 6vw, 70px); letter-spacing: -.04em; }
.page-hero p { max-width: 620px; margin: 23px 0 0; color: #b7c5cc; line-height: 1.9; }
.about-intro { display: grid; grid-template-columns: .85fr 1.15fr; gap: 90px; align-items: start; }
.about-intro h2 { margin: 0; font-size: clamp(38px, 4.4vw, 58px); line-height: 1.2; }
.about-intro-copy p { margin: 0 0 20px; color: var(--muted); line-height: 2; }
.about-sign { display: flex; align-items: center; gap: 17px; margin-top: 34px; padding-top: 25px; border-top: 1px solid var(--line); }
.about-sign strong { color: var(--steel); font-size: 18px; }
.about-sign span { color: var(--muted); font-size: 12px; }
.about-contact-row { display: flex; flex-wrap: wrap; gap: 12px 34px; margin-top: 22px; }
.about-contact-row a { display: grid; gap: 4px; }
.about-contact-row span { color: var(--muted); font-size: 10px; letter-spacing: .12em; text-transform: uppercase; }
.about-contact-row strong { color: var(--steel); font: 700 14px/1.4 Arial, sans-serif; }
.about-contact-row a:hover strong { color: var(--accent); }
.value-grid { display: grid; grid-template-columns: repeat(4,1fr); gap: 1px; background: #344752; }
.value-card { min-height: 280px; padding: 36px 30px; color: #fff; background: var(--ink-2); transition: background .2s; }
.value-card:hover { background: var(--steel); }
.value-card .num { color: var(--accent); font: 700 14px/1 Arial; }
.value-card h3 { margin: 55px 0 16px; font-size: 22px; }
.value-card p { margin: 0; color: #aebbc2; font-size: 13px; line-height: 1.85; }
.process-list { display: grid; grid-template-columns: repeat(5,1fr); }
.process-item { position: relative; padding: 0 25px 0 0; }
.process-item::before { content: ""; position: absolute; left: 45px; right: 0; top: 18px; height: 1px; background: var(--line); }
.process-item:last-child::before { display: none; }
.process-item strong { position: relative; z-index: 1; display: grid; place-items: center; width: 37px; height: 37px; margin-bottom: 25px; color: #fff; background: var(--steel); font: 700 12px Arial; }
.process-item h3 { margin: 0 0 10px; font-size: 17px; }
.process-item p { margin: 0; color: var(--muted); font-size: 12px; line-height: 1.7; }

.category-tabs { display: flex; gap: 8px; flex-wrap: wrap; margin-bottom: 38px; }
.category-tabs a { padding: 13px 22px; color: var(--muted); border: 1px solid var(--line); background: #fff; font-size: 13px; font-weight: 700; }
.category-tabs a:hover, .category-tabs a.active { color: #fff; border-color: var(--steel); background: var(--steel); }
.products-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 25px; }
.products-grid .product-card-body { padding: 27px; }
.products-grid .product-card-body h3 { font-size: 22px; }
.category-lead { display: grid; grid-template-columns: 1fr 1fr; gap: 60px; align-items: center; margin-bottom: 64px; padding: 40px; color: #fff; background: var(--ink-2); }
.category-lead img { width: 100%; max-height: 400px; object-fit: contain; background: #fff; }
.category-lead h2 { margin: 0 0 17px; font-size: 35px; }
.category-lead p { color: #afbdc5; line-height: 1.9; }

.product-detail-hero { padding: calc(var(--header) + 52px) 0 72px; background: #e9ecea; }
.product-detail-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 70px; align-items: center; }
.product-detail-image { position: relative; padding: 35px; background: #fff; box-shadow: var(--shadow); }
.product-detail-image img { width: 100%; aspect-ratio: 1.1; object-fit: contain; }
.product-detail-image::after { content: attr(data-code); position: absolute; left: 15px; bottom: 12px; color: #dde2e2; font: 800 46px Arial; }
.product-detail-copy .breadcrumbs { color: var(--muted); }
.product-detail-copy h1 { margin: 0 0 20px; font-size: clamp(38px, 5vw, 62px); line-height: 1.1; }
.product-detail-copy > p { color: var(--muted); font-size: 16px; line-height: 2; }
.detail-chips { display: flex; flex-wrap: wrap; gap: 8px; margin: 30px 0; }
.detail-chips span { padding: 8px 12px; color: var(--steel); border: 1px solid #cbd3d6; background: #f8f9f7; font-size: 11px; font-weight: 700; }
.detail-section-grid { display: grid; grid-template-columns: .73fr 1.27fr; gap: 80px; }
.detail-sidebar { position: sticky; top: 100px; align-self: start; }
.detail-sidebar h2 { margin: 0 0 18px; font-size: 34px; }
.detail-sidebar p { color: var(--muted); line-height: 1.9; }
.feature-list { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; margin-bottom: 55px; }
.feature-item { padding: 24px; border: 1px solid var(--line); background: #fff; }
.feature-item b { display: block; margin-bottom: 9px; color: var(--accent); font-size: 13px; }
.feature-item strong { font-size: 16px; }
.feature-item p { margin: 10px 0 0; color: var(--muted); font-size: 12px; line-height: 1.75; }
.specs-title { margin: 0 0 20px; font-size: 26px; }
.spec-table { width: 100%; border-collapse: collapse; background: #fff; }
.spec-table th, .spec-table td { padding: 17px 20px; border-bottom: 1px solid var(--line); text-align: left; font-size: 13px; line-height: 1.65; vertical-align: top; }
.spec-table th { width: 31%; color: var(--steel); background: #edf0ef; font-weight: 700; }
.application-list { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 18px; }
.application-list span { padding: 11px 15px; color: #fff; background: var(--steel); font-size: 12px; }
.detail-gallery { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.detail-gallery.single { grid-template-columns: 1fr; }
.detail-gallery img { width: 100%; height: 100%; min-height: 310px; max-height: 520px; object-fit: contain; background: #fff; border: 1px solid var(--line); }

/* News / video CMS */
.content-toolbar { display: flex; align-items: center; justify-content: space-between; gap: 20px; margin-bottom: 34px; padding: 20px 24px; border: 1px solid var(--line); background: #fff; }
.content-toolbar p { margin: 0; color: var(--muted); font-size: 12px; line-height: 1.65; }
.admin-panel { margin-bottom: 35px; padding: 30px; color: #fff; background: var(--ink-2); }
.admin-panel[hidden] { display: none; }
.admin-panel h2 { margin: 0 0 8px; font-size: 24px; }
.admin-panel > p { margin: 0 0 23px; color: #9fb0ba; font-size: 12px; }
.content-form { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.field { display: grid; gap: 8px; }
.field-full { grid-column: 1 / -1; }
.field label { color: #c5d0d6; font-size: 12px; }
.field input, .field textarea { width: 100%; padding: 13px 14px; color: #fff; border: 1px solid #405460; outline: none; background: #0d1b24; }
.field textarea { min-height: 100px; resize: vertical; }
.field input:focus, .field textarea:focus { border-color: var(--accent); }
.form-actions { grid-column: 1 / -1; display: flex; justify-content: flex-end; gap: 10px; margin-top: 4px; }
.news-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 24px; }
.news-card { position: relative; background: #fff; border: 1px solid #e1e5e4; }
.news-card-image { aspect-ratio: 1.65; overflow: hidden; background: linear-gradient(135deg, #1c3546, #0e1a22); }
.news-card-image img { width: 100%; height: 100%; object-fit: cover; }
.news-placeholder { display: grid; place-items: center; height: 100%; color: rgba(255,255,255,.15); font: 800 70px Arial; }
.news-card-body { padding: 26px; }
.news-card time { color: var(--accent); font: 700 11px Arial; letter-spacing: .12em; }
.news-card h2 { margin: 13px 0 12px; font-size: 20px; line-height: 1.5; }
.news-card p { margin: 0; color: var(--muted); font-size: 13px; line-height: 1.8; }
.delete-button { position: absolute; right: 10px; top: 10px; z-index: 4; width: 33px; height: 33px; color: #fff; border: 0; background: rgba(8,17,24,.74); }
.delete-button:hover { background: #b53822; }
.video-grid { display: grid; grid-template-columns: repeat(2,1fr); gap: 28px; }
.video-card { position: relative; overflow: hidden; background: #fff; border: 1px solid var(--line); }
.video-frame { position: relative; aspect-ratio: 16/9; background: #09131a; }
.video-frame video { width: 100%; height: 100%; object-fit: contain; }
.video-frame img { width: 100%; height: 100%; object-fit: cover; opacity: .68; }
.video-empty { display: grid; place-items: center; height: 100%; color: #81939e; background: radial-gradient(circle, #1c3444, #09131a); }
.video-empty span { display: grid; place-items: center; width: 70px; height: 70px; margin: auto; border: 1px solid #6d838f; border-radius: 50%; font-size: 22px; }
.video-card-body { padding: 24px; }
.video-card-body small { color: var(--accent); font-size: 10px; letter-spacing: .15em; }
.video-card-body h2 { margin: 9px 0 8px; font-size: 20px; }
.video-card-body p { margin: 0; color: var(--muted); font-size: 12px; line-height: 1.75; }
.empty-state { grid-column: 1 / -1; padding: 75px 30px; text-align: center; border: 1px dashed #bec7c9; background: #fff; }
.empty-state strong { display: block; font-size: 22px; }
.empty-state p { color: var(--muted); }
.toast { position: fixed; right: 28px; bottom: 28px; z-index: 300; max-width: 340px; padding: 15px 20px; color: #fff; background: var(--ink); box-shadow: var(--shadow); opacity: 0; transform: translateY(15px); pointer-events: none; transition: .25s; }
.toast.show { opacity: 1; transform: translateY(0); }

.site-footer { color: #b8c3c9; background: #071017; }
.footer-top { width: min(var(--max), calc(100% - 48px)); margin: auto; display: grid; grid-template-columns: 1.55fr .7fr .75fr 1.1fr; gap: 55px; padding: 76px 0 60px; }
.footer-brand p { max-width: 370px; margin: 26px 0 0; color: #748893; font-size: 13px; line-height: 1.9; }
.brand-light { color: #fff; }
.footer-links, .footer-contact-block { display: grid; align-content: start; gap: 13px; }
.footer-links h3, .footer-contact-block h3 { margin: 0 0 13px; color: #fff; font-size: 14px; }
.footer-links a { color: #82959f; font-size: 12px; }
.footer-links a:hover { color: #fff; }
.footer-contact-block p { display: grid; margin: 0 0 10px; }
.footer-contact-block span { color: #5f747f; font-size: 10px; }
.footer-contact-block strong { margin-top: 4px; color: #aebbc2; font-size: 12px; font-weight: 400; }
.footer-bottom { display: flex; justify-content: space-between; width: min(var(--max), calc(100% - 48px)); margin: auto; padding: 22px 0; border-top: 1px solid #1b2931; color: #52656f; font-size: 10px; }

@media (max-width: 1080px) {
  .header-contact { display: none; }
  .primary-nav { gap: 22px; }
  .hero { min-height: 750px; }
  .hero-inner { grid-template-columns: 1fr 1fr; }
  .hero-image-tag { left: -20px; }
  .category-grid { grid-template-columns: 1fr 1fr; }
  .category-card:first-child { grid-column: 1 / -1; }
  .product-showcase { grid-template-columns: repeat(2,1fr); }
  .products-grid { grid-template-columns: repeat(2,1fr); }
  .footer-top { grid-template-columns: 1.4fr .7fr .7fr; }
  .footer-contact-block { grid-column: 1 / -1; grid-template-columns: repeat(3,1fr); }
  .footer-contact-block h3 { grid-column: 1 / -1; }
}

@media (max-width: 820px) {
  :root { --header: 70px; }
  .header-inner { width: min(100% - 30px, var(--max)); gap: 12px; }
  .brand-copy strong { font-size: 16px; }
  .menu-toggle { display: block; }
  .lang-switch { margin-left: auto; }
  .menu-toggle { margin-left: 0; }
  .menu-toggle.active span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
  .menu-toggle.active span:nth-child(2) { opacity: 0; }
  .menu-toggle.active span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }
  .primary-nav { position: absolute; inset: 100% 0 auto; width: 100vw; height: calc(100dvh - var(--header)); display: block; padding: 24px; background: #09131a; transform: translateX(100%); transition: transform .28s; overflow-y: auto; }
  .primary-nav.open { transform: translateX(0); }
  .primary-nav > a, .dropdown-trigger { height: 56px; border-bottom: 1px solid #25343d; font-size: 16px; }
  .primary-nav > a::after, .dropdown-trigger::after { display: none; }
  .nav-dropdown { display: block; }
  .dropdown-panel { position: static; width: auto; grid-template-columns: 1fr; padding: 8px 0 18px 20px; background: transparent; box-shadow: none; opacity: 1; visibility: visible; transform: none; }
  .dropdown-panel a { color: #a4b3bb; border-color: #25343d; }
  .dropdown-panel small { color: #71848f; }
  .dropdown-panel a:hover { background: #13232d; }
  .hero { min-height: auto; }
  .hero-inner { grid-template-columns: 1fr; padding: 100px 0 80px; }
  .hero-copy { padding: 20px 0 0; }
  .hero-visual { min-height: auto; }
  .hero-image-wrap { width: 88%; transform: translateX(3%); }
  .hero-scroll { display: none; }
  .home-stats { margin-top: 0; }
  .stats-grid { grid-template-columns: 1fr 1fr; }
  .stat-item:nth-child(2) { border-right: 0; }
  .stat-item:nth-child(-n+2) { border-bottom: 1px solid var(--line); }
  .section { padding: 80px 0; }
  .section-heading { display: block; }
  .section-heading p { margin-top: 20px; }
  .category-grid { grid-template-columns: 1fr; }
  .category-card:first-child { grid-column: auto; }
  .category-card { min-height: 390px; }
  .capability-grid, .about-intro, .product-detail-grid, .detail-section-grid, .category-lead { grid-template-columns: 1fr; gap: 45px; }
  .detail-sidebar { position: static; }
  .value-grid { grid-template-columns: 1fr 1fr; }
  .process-list { grid-template-columns: 1fr 1fr; gap: 30px 10px; }
  .process-item::before { display: none; }
  .news-grid { grid-template-columns: 1fr 1fr; }
  .detail-gallery { grid-template-columns: 1fr; }
  .cta-inner { display: block; }
  .cta-inner .btn { margin-top: 28px; }
  .footer-top { grid-template-columns: 1fr 1fr; }
  .footer-brand { grid-column: 1 / -1; }
  .footer-contact-block { grid-template-columns: 1fr; }
  .footer-contact-block h3 { grid-column: auto; }
}

@media (max-width: 560px) {
  .container, .hero-inner, .footer-top, .footer-bottom { width: min(100% - 30px, var(--max)); }
  .hero h1 { font-size: 43px; }
  .hero-copy > p { font-size: 14px; }
  .hero-image-tag { left: -10px; bottom: 18px; width: 125px; padding: 15px; }
  .stats-grid { grid-template-columns: 1fr 1fr; }
  .stat-item { padding: 24px 19px; }
  .stat-item strong { font-size: 27px; }
  .section { padding: 65px 0; }
  .product-showcase, .products-grid, .news-grid, .video-grid, .feature-list { grid-template-columns: 1fr; }
  .category-card { min-height: 340px; }
  .value-grid { grid-template-columns: 1fr; }
  .value-card { min-height: 235px; }
  .value-card h3 { margin-top: 35px; }
  .process-list { grid-template-columns: 1fr; }
  .product-detail-hero { padding-top: calc(var(--header) + 35px); }
  .product-detail-image { padding: 20px; }
  .category-lead { padding: 22px; }
  .content-toolbar { align-items: stretch; flex-direction: column; }
  .content-form { grid-template-columns: 1fr; }
  .field-full, .form-actions { grid-column: auto; }
  .footer-top { grid-template-columns: 1fr 1fr; gap: 40px 25px; }
  .footer-bottom { display: grid; gap: 7px; }
}