:root {
  --ink: #0a1219;
  --ink-2: #15232e;
  --steel: #27465c;
  --steel-light: #8da6b6;
  --paper: #f4f5f2;
  --white: #ffffff;
  --muted: #687681;
  --line: #d8ddde;
  --line-strong: #aeb9bd;
  --accent: #d45e32;
  --accent-dark: #aa3f1e;
  --accent-soft: #f3dfd6;
  --shadow: 0 20px 60px rgba(25, 47, 60, 0.10);
  --radius: 4px;
  --max: 1240px;
  --header: 72px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; overflow-x: clip; }
body {
  margin: 0;
  overflow-x: clip;
  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; }
button:focus-visible, a:focus-visible, input:focus-visible, textarea:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}
.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: background .25s, box-shadow .25s;
}
.site-header.scrolled { 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: 28px; }
.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: "Bahnschrift", "Arial Black", 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-mark.brand-mark-image { display: grid; width: auto; min-width: 48px; max-width: 156px; place-items: center; flex-basis: auto; }
.brand-mark.brand-mark-image::before, .brand-mark.brand-mark-image::after { display: none; }
.brand-mark.brand-mark-image img { display: block; width: auto; max-width: 156px; height: 40px; object-fit: contain; }
.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: 24px; 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; }
.header-socials { display: flex; max-width: 156px; align-items: center; gap: 6px; margin-block: auto; padding-left: 4px; overflow-x: auto; scrollbar-width: none; }
.header-socials::-webkit-scrollbar { display: none; }
.header-socials[hidden] { display: none; }
.header-socials .social-link { width: 32px; height: 32px; flex: 0 0 32px; color: #9eb0ba; background: rgba(255,255,255,.035); border-color: rgba(255,255,255,.18); }
.header-socials .social-link svg { width: 15px; height: 15px; }
.header-socials .social-link img { width: 18px; height: 18px; }
.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: 1fr; padding: 17px 14px; border: 1px solid transparent; }
.dropdown-panel a:hover { border-color: var(--line); background: var(--paper); }
.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: "Bahnschrift", 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: 100dvh; background: var(--paper); }
.scroll-sentinel { position: absolute; top: 0; left: 0; width: 1px; height: 1px; pointer-events: none; }
.container { width: min(var(--max), calc(100% - 48px)); margin-inline: auto; }
.section { padding: clamp(82px, 8vw, 112px) 0; }
.section-white { background: #f9faf8; }
.section-dark { color: var(--white); background: var(--ink); }
.section-heading { display: grid; justify-items: start; gap: 20px; max-width: 820px; 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: 650px; margin: 0; color: var(--muted); line-height: 1.85; }
.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-dark); }
.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; }
.btn:active { transform: translateY(1px) scale(.985); }
.text-link { display: inline-flex; align-items: center; gap: 12px; color: var(--accent-dark); 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: 100dvh; 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: .22; background: linear-gradient(110deg, rgba(255,255,255,.035), transparent 38%, rgba(212,94,50,.045) 72%, transparent); clip-path: polygon(0 0, 72% 0, 48% 100%, 0 100%); }
.hero::after { content: ""; position: absolute; width: 430px; height: 430px; right: -220px; bottom: -180px; border: 80px solid rgba(212,94,50,.12); border-radius: 50%; }
.particle-field { position: absolute; inset: 0; z-index: 0; width: 100%; height: 100%; pointer-events: none; opacity: .9; }
.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: .92fr 1.08fr; align-items: center; gap: 58px; }
.hero-copy { padding: 56px 0; }
.hero h1 { margin: 0; font-size: clamp(48px, 5.5vw, 70px); 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: 540px; margin: 27px 0 35px; color: #b7c4cb; font-size: 16px; line-height: 1.85; }
.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: 94%; background: #f8f9f7; box-shadow: 0 38px 100px rgba(0,0,0,.32); transform: perspective(1100px) translate3d(calc(3% + var(--shift-x, 0px)), var(--shift-y, 0px), 0) rotateX(var(--tilt-x, 0deg)) rotateY(var(--tilt-y, 0deg)); transform-style: preserve-3d; transition: transform .5s cubic-bezier(.16,1,.3,1), box-shadow .5s; }
.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::after { content: ""; position: absolute; inset: 0; pointer-events: none; background: linear-gradient(105deg, transparent 36%, rgba(255,255,255,.52) 48%, transparent 60%); transform: translateX(-120%); animation: machine-scan 7.5s 1.2s ease-in-out infinite; mix-blend-mode: soft-light; }
.hero-image-wrap img { width: 100%; aspect-ratio: 1 / .78; object-fit: contain; }
.hero-image-tag { display: flex; align-items: baseline; gap: 13px; width: 100%; padding: 14px 18px; color: #fff; background: var(--accent-dark); }
.hero-image-tag strong { display: block; flex: 0 0 auto; font: 700 31px/1 Arial; }
.hero-image-tag span { display: block; font-size: 11px; letter-spacing: .1em; }
.home-stats { position: relative; z-index: 4; margin-top: -38px; }
.stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); background: #fff; border: 1px solid var(--line); box-shadow: 0 18px 45px rgba(20,44,58,.08); }
.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: repeat(12, 1fr); grid-template-rows: repeat(2, minmax(0, 1fr)); gap: 18px; }
.category-card { position: relative; grid-column: span 5; min-height: 300px; overflow: hidden; color: #fff; background: #152630; }
.category-card:first-child { grid-column: span 7; grid-row: span 2; min-height: 618px; }
.category-card img { width: 100%; height: 100%; object-fit: contain; background: #f8f9f7; transition: transform .6s cubic-bezier(.16,1,.3,1); }
.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:focus-visible 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(12, 1fr); gap: 18px; }
.product-showcase .product-card { grid-column: span 5; }
.product-showcase .product-card:nth-child(1), .product-showcase .product-card:nth-child(4) { grid-column: span 7; }
.product-card { position: relative; display: flex; flex-direction: column; min-width: 0; background: #fff; border: 1px solid #e2e6e5; transition: transform .3s cubic-bezier(.16,1,.3,1), box-shadow .3s, border-color .3s; }
.product-card:hover { transform: translateY(-7px); border-color: transparent; box-shadow: var(--shadow); }
.product-card:focus-visible { 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-body { flex: 1; padding: 23px; }
.product-card-body small { display: block; margin-bottom: 12px; color: var(--accent); font-size: 10px; font-weight: 700; letter-spacing: .12em; }
.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-section { border-top: 1px solid var(--line); }
.capability-visual { position: relative; padding: 26px; background: #fff; border: 1px solid var(--line); }
.capability-visual img { width: 100%; aspect-ratio: 1; object-fit: contain; background: #fff; }
.capability-visual::before { content: ""; position: absolute; inset: 18px -18px -18px 18px; border: 1px solid #c6d0d3; z-index: -1; }
.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: var(--muted); 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 var(--line); }
.capability-list strong { display: block; margin-bottom: 7px; }
.capability-list span { color: var(--muted); 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) + 70px) 0 72px; 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); }
.principles-section { background: #edf1f0; }
.value-grid { display: grid; grid-template-columns: repeat(4,1fr); gap: 16px; }
.value-card { min-height: 230px; padding: 34px 30px; color: var(--ink); background: #fff; border-top: 3px solid var(--steel); transition: transform .25s, border-color .25s; }
.value-card:hover { transform: translateY(-4px); border-color: var(--accent); }
.value-card h3 { margin: 34px 0 16px; font-size: 22px; }
.value-card p { margin: 0; color: var(--muted); font-size: 13px; line-height: 1.85; }
.process-list { display: grid; grid-template-columns: repeat(5,1fr); }
.process-item { position: relative; padding: 27px 25px 0 0; border-top: 2px solid var(--line); }
.process-item::before { display: none; }
.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; }
.topic-catalog-note { display: grid; grid-template-columns: minmax(0,1.25fr) auto; gap: 48px; align-items: center; padding: 42px; border: 1px solid var(--line); background: #fff; }
.topic-catalog-note h2 { margin: 0 0 12px; font-size: clamp(25px,3vw,36px); line-height: 1.2; letter-spacing: -.025em; }
.topic-catalog-note p { max-width: 68ch; margin: 0; color: var(--muted); line-height: 1.85; }
.topic-catalog-actions { display: flex; flex-wrap: wrap; gap: 12px; }
.topic-catalog-note .btn-outline { color: var(--steel); }
.topic-catalog-note .btn-outline:hover { color: #fff; }
.topic-selection-head { display: grid; grid-template-columns: minmax(0,1fr) minmax(320px,.8fr); gap: 90px; align-items: end; margin-bottom: 58px; }
.topic-selection-head h2 { max-width: 760px; margin: 0; font-size: clamp(35px,4.6vw,58px); line-height: 1.12; letter-spacing: -.038em; }
.topic-selection-head p { max-width: 66ch; margin: 0; color: #afbec7; font-size: 16px; line-height: 1.9; }
.selection-factors { display: grid; grid-template-columns: repeat(2,minmax(0,1fr)); border-top: 1px solid var(--steel); border-bottom: 1px solid var(--steel); }
.selection-factor { min-height: 178px; padding: 32px 34px 34px 0; }
.selection-factor:nth-child(even) { padding-left: 34px; border-left: 1px solid var(--steel); }
.selection-factor:nth-child(n+3) { border-top: 1px solid var(--steel); }
.selection-factor h3 { margin: 0 0 14px; color: #fff; font-size: 21px; }
.selection-factor p { max-width: 62ch; margin: 0; color: #9fb0ba; line-height: 1.85; }
.topic-decision-grid { display: grid; grid-template-columns: minmax(0,1.65fr) minmax(300px,.65fr); gap: clamp(42px,6vw,90px); align-items: start; }
.option-table-wrap h2, .inquiry-checklist h2, .topic-faq-heading h2 { margin: 0 0 30px; font-size: clamp(29px,3.3vw,43px); line-height: 1.18; letter-spacing: -.03em; }
.option-table-scroll { overflow-x: auto; border: 1px solid var(--line); background: #fff; }
.option-table-scroll:focus-visible { outline: 2px solid var(--accent); outline-offset: 4px; }
.option-table { width: 100%; min-width: 720px; border-collapse: collapse; table-layout: fixed; }
.option-table th, .option-table td { padding: 20px 22px; border-bottom: 1px solid var(--line); text-align: left; vertical-align: top; font-size: 14px; line-height: 1.7; }
.option-table thead th { color: #fff; background: var(--steel); font-size: 12px; letter-spacing: .05em; }
.option-table tbody th { width: 26%; color: var(--ink); font-size: 15px; }
.option-table tbody td { color: var(--muted); }
.option-table tbody tr:last-child > * { border-bottom: 0; }
.inquiry-checklist { padding: 36px; color: #fff; background: var(--ink-2); }
.inquiry-checklist h2 { font-size: clamp(27px,3vw,38px); }
.inquiry-checklist ol { margin: 0 0 32px; padding: 0; list-style: none; counter-reset: checklist; }
.inquiry-checklist li { position: relative; min-height: 54px; padding: 16px 0 16px 42px; border-top: 1px solid var(--steel); color: #c2cdd2; line-height: 1.65; counter-increment: checklist; }
.inquiry-checklist li::before { content: counter(checklist); position: absolute; left: 0; top: 16px; color: #fff; font: 700 14px/1.65 Bahnschrift,Arial,sans-serif; }
.inquiry-checklist .btn { width: 100%; }
.topic-faq-grid { display: grid; grid-template-columns: minmax(250px,.7fr) minmax(0,1.3fr); gap: clamp(45px,8vw,110px); align-items: start; }
.topic-faq-heading { position: sticky; top: calc(var(--header) + 32px); }
.topic-faq-heading p { max-width: 42ch; margin: 0; color: var(--muted); line-height: 1.85; }
.faq-list { border-top: 1px solid var(--line); }
.faq-list details { border-bottom: 1px solid var(--line); }
.faq-list summary { min-height: 72px; display: flex; align-items: center; padding: 20px 4px; color: var(--ink); font-size: 17px; font-weight: 700; line-height: 1.5; cursor: pointer; }
.faq-list summary:hover { color: var(--accent-dark); }
.faq-list details[open] summary { color: var(--accent-dark); }
.faq-list details p { max-width: 72ch; margin: -3px 0 0; padding: 0 4px 25px; color: var(--muted); 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-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-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.spec-item { display: grid; align-content: start; gap: 12px; min-height: 126px; padding: 22px; background: #fff; border: 1px solid var(--line); }
.spec-item strong { color: var(--steel); font-size: 13px; }
.spec-item span { color: var(--muted); font-size: 12px; line-height: 1.7; }
.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(12,1fr); gap: 24px; }
.news-card { grid-column: span 5; }
.news-card:first-child { grid-column: span 7; grid-row: span 2; }
.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; }
.content-status { min-height: 24px; margin: 0 0 24px; color: var(--muted); font-size: 13px; }
.content-status.error { color: #a83d24; }
.content-status.loading::after { content: ""; display: inline-block; width: 42px; height: 1px; margin-left: 10px; vertical-align: middle; background: linear-gradient(90deg, transparent, var(--accent), transparent); background-size: 200% 100%; animation: status-scan 1.1s linear infinite; }
.content-skeleton { pointer-events: none; }
.content-skeleton .news-card-image, .content-skeleton .video-frame, .content-skeleton h2, .content-skeleton p { color: transparent; background: linear-gradient(100deg, #e4e8e7 30%, #f4f6f5 45%, #e4e8e7 60%); background-size: 220% 100%; animation: skeleton-scan 1.35s linear infinite; }
.news-card-body .text-link { margin-top: 18px; }
.news-body { max-width: 820px; margin-inline: auto; }
.news-body .news-cover { width: 100%; max-height: 560px; margin-bottom: 42px; object-fit: cover; background: #fff; }
.news-body .news-copy { color: #42525c; font-size: 16px; line-height: 2; white-space: pre-wrap; }
.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, .video-frame iframe { width: 100%; height: 100%; border: 0; 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); }

/* Motion layer */
.reveal { opacity: 0; transform: translateY(22px); }
.reveal.is-visible { opacity: 1; transform: translateY(0); transition: opacity .62s cubic-bezier(.16,1,.3,1), transform .62s cubic-bezier(.16,1,.3,1); }
.reveal-delay-1.is-visible { transition-delay: .06s; }
.reveal-delay-2.is-visible { transition-delay: .12s; }
.reveal-delay-3.is-visible { transition-delay: .18s; }

@media (prefers-reduced-motion: no-preference) {
  .hero-copy { animation: hero-enter .72s cubic-bezier(.16,1,.3,1) both; }
  .hero-visual { animation: hero-enter .82s .1s cubic-bezier(.16,1,.3,1) both; }
}
@keyframes hero-enter {
  from { opacity: 0; transform: translateY(22px); }
  to { opacity: 1; transform: translateY(0); }
}
@keyframes machine-scan { 0%, 70%, 100% { transform: translateX(-120%); } 84% { transform: translateX(120%); } }
@keyframes status-scan { to { background-position: -200% 0; } }
@keyframes skeleton-scan { to { background-position: -220% 0; } }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; }
  .reveal { opacity: 1; transform: none; }
}

.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-socials { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 8px; }
.footer-socials[hidden] { display: none; }
.social-link { display: grid; place-items: center; width: 44px; height: 44px; color: #9eb0ba; border: 1px solid #2a3a44; background: #0d1921; transition: color .2s, border-color .2s, background .2s, transform .2s; }
.social-link:hover, .social-link:focus-visible { color: #fff; border-color: var(--accent); background: var(--accent); transform: translateY(-2px); }
.social-link svg { width: 19px; height: 19px; fill: currentColor; }
.social-link img { display: block; width: 23px; height: 23px; object-fit: contain; }
.social-link-custom { background: #fff; }
.social-link-custom:hover, .social-link-custom:focus-visible { background: #fff; border-color: var(--accent); }
.social-link svg.social-link-generic { fill: none; stroke: currentColor; stroke-width: 1.7; stroke-linecap: round; stroke-linejoin: round; }
.chat-widget { position: fixed; right: 24px; bottom: 24px; z-index: 90; display: grid; justify-items: end; }
.chat-widget.is-open { z-index: 130; }
.chat-launcher { display: flex; min-width: 132px; min-height: 52px; align-items: center; justify-content: center; gap: 10px; padding: 0 18px; color: #fff; background: var(--accent-dark); border: 1px solid var(--accent-dark); border-radius: 4px; box-shadow: 0 14px 36px rgba(7,16,23,.24); font: 700 14px/1 "Microsoft YaHei", sans-serif; cursor: pointer; transition: transform .2s, background .2s, box-shadow .2s; }
.chat-launcher:hover { background: var(--accent); transform: translateY(-2px); box-shadow: 0 18px 42px rgba(7,16,23,.3); }
.chat-launcher:focus-visible, .chat-close:focus-visible, .chat-wechat-id button:focus-visible, .chat-primary-action:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; }
.chat-launcher svg { width: 23px; height: 23px; fill: none; stroke: currentColor; stroke-width: 1.7; stroke-linecap: round; stroke-linejoin: round; }
.chat-panel { position: absolute; right: 0; bottom: calc(100% + 12px); width: 336px; padding: 26px; color: var(--ink); background: #fff; border: 1px solid var(--line); box-shadow: 0 24px 65px rgba(7,16,23,.22); transform-origin: right bottom; animation: chat-panel-in .24s cubic-bezier(.22,1,.36,1); }
.chat-panel[hidden] { display: none; }
.chat-close { position: absolute; top: 13px; right: 13px; display: grid; width: 36px; height: 36px; place-items: center; color: var(--muted); background: var(--surface-cool); border: 1px solid var(--line); border-radius: 4px; cursor: pointer; }
.chat-close:hover { color: var(--ink); border-color: var(--line-strong); }
.chat-close svg { width: 17px; height: 17px; fill: none; stroke: currentColor; stroke-width: 1.8; stroke-linecap: round; }
.chat-panel-copy { padding-right: 32px; }
.chat-panel-copy h2 { margin: 0 0 10px; font-size: 21px; line-height: 1.3; letter-spacing: -.02em; }
.chat-panel-copy p { margin: 0 0 20px; color: var(--muted); font-size: 13px; line-height: 1.75; }
.chat-wechat-qr { display: grid; width: 184px; height: 184px; margin: 0 auto 18px; place-items: center; padding: 8px; background: #fff; border: 1px solid var(--line); }
.chat-wechat-qr img { display: block; width: 100%; height: 100%; object-fit: contain; }
.chat-wechat-id { display: grid; grid-template-columns: auto minmax(0, 1fr) auto; align-items: center; gap: 10px; min-height: 48px; padding: 7px 8px 7px 13px; background: var(--surface-cool); border: 1px solid var(--line); }
.chat-wechat-id span { color: var(--muted); font-size: 11px; }
.chat-wechat-id strong { overflow: hidden; font-size: 13px; text-overflow: ellipsis; white-space: nowrap; }
.chat-wechat-id button { min-height: 34px; padding: 0 12px; color: var(--steel); background: #fff; border: 1px solid var(--line-strong); border-radius: 4px; font-size: 12px; font-weight: 700; cursor: pointer; }
.chat-primary-action { display: flex; min-height: 48px; align-items: center; justify-content: center; padding: 0 18px; color: #fff; background: var(--accent-dark); border: 1px solid var(--accent-dark); font-size: 13px; font-weight: 700; }
.chat-primary-action:hover { color: #fff; background: var(--accent); }
@keyframes chat-panel-in { from { opacity: .45; transform: translateY(10px) scale(.98); } to { opacity: 1; transform: translateY(0) scale(1); } }
.inquiry-widget { position: fixed; right: 24px; bottom: 24px; z-index: 89; display: grid; justify-items: end; }
.inquiry-widget.is-open { z-index: 130; }
.inquiry-widget.with-chat { bottom: 88px; }
.inquiry-launcher { display: flex; min-width: 132px; min-height: 48px; align-items: center; justify-content: center; gap: 9px; padding: 0 17px; color: #fff; background: var(--steel); border: 1px solid var(--steel); border-radius: 4px; box-shadow: 0 13px 32px rgba(7,16,23,.2); font: 700 13px/1 "Microsoft YaHei", sans-serif; cursor: pointer; transition: transform .2s, background .2s, box-shadow .2s; }
.inquiry-launcher:hover { background: #1d394c; transform: translateY(-2px); box-shadow: 0 17px 38px rgba(7,16,23,.28); }
.inquiry-launcher svg { width: 21px; height: 21px; fill: none; stroke: currentColor; stroke-width: 1.7; stroke-linecap: round; stroke-linejoin: round; }
.inquiry-launcher:focus-visible, .inquiry-close:focus-visible, .inquiry-form input:focus-visible, .inquiry-form textarea:focus-visible, .inquiry-submit:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; }
.inquiry-panel { position: absolute; right: 0; bottom: calc(100% + 12px); width: 392px; max-height: min(720px, calc(100vh - 130px)); overflow-y: auto; overscroll-behavior: contain; padding: 25px; color: var(--ink); background: #fff; border: 1px solid var(--line); box-shadow: 0 24px 65px rgba(7,16,23,.22); transform-origin: right bottom; animation: chat-panel-in .24s cubic-bezier(.22,1,.36,1); }
.inquiry-panel[hidden] { display: none; }
.inquiry-close { position: absolute; top: 13px; right: 13px; display: grid; width: 36px; height: 36px; place-items: center; color: var(--muted); background: var(--surface-cool); border: 1px solid var(--line); border-radius: 4px; cursor: pointer; }
.inquiry-close:hover { color: var(--ink); border-color: var(--line-strong); }
.inquiry-close svg { width: 17px; height: 17px; fill: none; stroke: currentColor; stroke-width: 1.8; stroke-linecap: round; }
.inquiry-panel-copy { padding-right: 36px; }
.inquiry-panel-copy h2 { margin: 0 0 8px; font-size: 21px; line-height: 1.3; letter-spacing: -.02em; }
.inquiry-panel-copy p { max-width: 62ch; margin: 0 0 18px; color: var(--muted); font-size: 12px; line-height: 1.7; }
.inquiry-form { display: grid; gap: 14px; }
.inquiry-field-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.inquiry-form label { display: grid; gap: 6px; color: var(--ink-2); font-size: 11px; font-weight: 700; }
.inquiry-form input, .inquiry-form textarea { width: 100%; color: var(--ink); background: #fff; border: 1px solid var(--line-strong); border-radius: 3px; font: 400 13px/1.5 "Microsoft YaHei", sans-serif; }
.inquiry-form input { min-height: 42px; padding: 0 11px; }
.inquiry-form textarea { min-height: 112px; padding: 10px 11px; resize: vertical; }
.inquiry-form input:hover, .inquiry-form textarea:hover { border-color: var(--steel-light); }
.inquiry-form input:focus, .inquiry-form textarea:focus { border-color: var(--steel); }
.inquiry-form-note { margin: -2px 0 0; color: var(--muted); font-size: 10px; line-height: 1.6; }
.inquiry-form-error { margin: 0; padding: 10px 12px; color: #8e2f23; background: #f8e5e2; border: 1px solid #e4b7b0; font-size: 11px; line-height: 1.55; }
.inquiry-submit { min-height: 46px; padding: 0 18px; color: #fff; background: var(--accent-dark); border: 1px solid var(--accent-dark); border-radius: 3px; font-size: 13px; font-weight: 800; cursor: pointer; }
.inquiry-submit:hover:not(:disabled) { background: var(--accent); }
.inquiry-submit:disabled { cursor: wait; opacity: .65; }
.inquiry-honeypot { position: absolute !important; left: -10000px !important; width: 1px !important; height: 1px !important; overflow: hidden !important; }
.inquiry-success { display: grid; min-height: 260px; place-items: center; align-content: center; padding: 28px 10px; text-align: center; }
.inquiry-success svg { width: 54px; height: 54px; margin-bottom: 18px; padding: 12px; color: #fff; background: #247354; border-radius: 50%; fill: none; stroke: currentColor; stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; }
.inquiry-success h3 { margin: 0 0 10px; font-size: 20px; }
.inquiry-success p { max-width: 34ch; margin: 0; color: var(--muted); font-size: 12px; line-height: 1.7; }
.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: #81939d; font-size: 10px; }

@media (max-width: 1080px) {
  .header-contact { display: none; }
  .primary-nav { gap: 22px; }
  .hero { min-height: 100dvh; }
  .hero-inner { grid-template-columns: 1fr 1fr; }
  .hero-image-tag { left: -20px; }
  .category-grid { grid-template-columns: 1fr 1fr; }
  .category-card { grid-column: auto; min-height: 360px; }
  .category-card:first-child { grid-column: 1 / -1; grid-row: auto; min-height: 460px; }
  .product-showcase { grid-template-columns: repeat(2,1fr); }
  .product-showcase .product-card,
  .product-showcase .product-card:nth-child(1),
  .product-showcase .product-card:nth-child(4) { grid-column: auto; }
  .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%); visibility: hidden; pointer-events: none; transition: transform .28s, visibility 0s .28s; overflow-y: auto; }
  .primary-nav.open { transform: translateX(0); visibility: visible; pointer-events: auto; transition-delay: 0s; }
  .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; }
  .header-socials { max-width: none; flex-wrap: wrap; gap: 10px; margin-top: 24px; padding: 20px 0 0; border-top: 1px solid #25343d; overflow: visible; }
  .header-socials .social-link { width: 44px; height: 44px; flex-basis: 44px; }
  .hero { min-height: auto; }
  .hero-inner { grid-template-columns: 1fr; padding: calc(var(--header) + 36px) 0 74px; gap: 30px; }
  .hero-copy { padding: 20px 0 0; }
  .hero-visual { min-height: auto; }
  .hero-image-wrap { width: 88%; transform: translateX(3%); }
  .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; min-height: 390px; }
  .category-card { min-height: 390px; }
  .capability-grid, .about-intro, .product-detail-grid, .detail-section-grid, .category-lead, .topic-selection-head, .topic-decision-grid, .topic-faq-grid, .topic-catalog-note { grid-template-columns: 1fr; gap: 45px; }
  .topic-selection-head { align-items: start; }
  .topic-faq-heading { position: static; }
  .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; }
  .news-card, .news-card:first-child { grid-column: auto; grid-row: auto; }
  .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: 400px) {
  .brand-copy small { display: none; }
  .brand { gap: 8px; }
  .brand-mark { width: 43px; flex-basis: 43px; }
  .lang-switch button { min-width: 36px; height: 36px; }
}

html[lang="en"] .hero h1 { font-size: clamp(42px, 5vw, 66px); letter-spacing: -.035em; }
html[lang="en"] .brand-copy strong { letter-spacing: .06em; }

@media (max-width: 560px) {
  .chat-widget { right: 15px; bottom: 15px; }
  .chat-panel { width: min(336px, calc(100vw - 30px)); padding: 22px; }
  .chat-launcher { min-width: 118px; min-height: 48px; padding-inline: 15px; }
  .inquiry-widget { right: 15px; bottom: 15px; }
  .inquiry-widget.with-chat { bottom: 76px; }
  .inquiry-panel { width: min(392px, calc(100vw - 30px)); max-height: calc(100dvh - 112px); padding: 21px; }
  .inquiry-launcher { min-width: 118px; min-height: 44px; padding-inline: 14px; }
  .inquiry-field-grid { grid-template-columns: 1fr; }
  .inquiry-form input, .inquiry-form textarea { font-size: 16px; }
  .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 { width: 100%; padding: 13px 15px; }
  .hero-image-tag strong { font-size: 28px; }
  .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; }
  .spec-grid { 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; }
  .topic-catalog-note, .inquiry-checklist { padding: 25px; }
  .topic-catalog-actions { align-items: stretch; flex-direction: column; }
  .topic-catalog-actions .btn { width: 100%; }
  .selection-factors { grid-template-columns: 1fr; }
  .selection-factor, .selection-factor:nth-child(even) { min-height: auto; padding: 25px 0; border-left: 0; }
  .selection-factor:nth-child(n+2) { border-top: 1px solid var(--steel); }
  .option-table th, .option-table td { padding: 17px; }
  .faq-list summary { font-size: 16px; }
  .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; }
}