/* =========================================================
   Lvbang Fine Chemical - Global Stylesheet
   Color system: brand-blue (primary) + brand-green (accent/CTA)
   Inspired by Lvbang's logo: deep blue + vivid green.
   ========================================================= */

:root {
  --c-blue-900: #0c1f4d;
  --c-blue-800: #1e3a8a;
  --c-blue-700: #1d4ed8;
  --c-blue-600: #2563eb;
  --c-blue-500: #3b82f6;
  --c-blue-100: #dbeafe;
  --c-green-700: #15803d;
  --c-green-600: #16a34a;
  --c-green-500: #22c55e;
  --c-green-400: #4ade80;
  --c-green-100: #dcfce7;
  --c-cyan-500: #06b6d4;
  --c-white: #ffffff;
  --c-bg: #f6f8fc;
  --c-bg-2: #eef3f9;
  --c-border: #e2e8f0;
  --c-text: #0f172a;
  --c-text-2: #475569;
  --c-text-3: #64748b;
  --c-success: #10b981;
  --shadow-sm: 0 1px 2px rgba(15, 23, 42, .06);
  --shadow-md: 0 4px 14px rgba(15, 23, 42, .08);
  --shadow-lg: 0 18px 40px rgba(15, 23, 42, .12);
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --container: 1240px;
  --header-h: 76px;
  --tib-h: 72px;  /* top info bar height */
  --font-en: "Inter", "Segoe UI", "Helvetica Neue", Arial, sans-serif;
  --font-cn: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", sans-serif;
  --ease: cubic-bezier(.2, .8, .2, 1);
}

/* ---------- reset ---------- */
*, *::before, *::after { box-sizing: border-box; }
html {
  font-size: 16px;
  margin: 0; padding: 0;
  -webkit-text-size-adjust: 100%;
  -ms-text-size-adjust: 100%;
  text-size-adjust: 100%;
  -webkit-tap-highlight-color: transparent;
}
body {
  margin: 0; padding: 0;
  font-size: 16px;
  font-family: var(--font-en);
  color: var(--c-text);
  background: var(--c-white);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}
/* Chinese font override when language is zh */
html[lang="zh"] body { font-family: var(--font-cn); }
/* Chinese font-weight 兜底（微软雅黑仅支持 400/700） */
html[lang="zh"] .hero h1,
html[lang="zh"] .section-head h2,
html[lang="zh"] .about-band h2,
html[lang="zh"] .cta-banner h3,
html[lang="zh"] .page-header h1,
html[lang="zh"] .pd-info h1 { font-weight: 700; }
img, svg { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; transition: color .2s var(--ease); }
a:hover { color: var(--c-blue-600); }
button { font-family: inherit; cursor: pointer; border: none; background: none; }
ul { list-style: none; padding: 0; margin: 0; }

/* ---------- bilingual visibility ---------- */
[data-en], [data-zh] { display: inline; }
html[lang="en"] [data-zh] { display: none; }
html[lang="zh"] [data-en] { display: none; }
/* block-level bilingual (use span with .i18n) */
.i18n { display: inline; }
html[lang="en"] .i18n[data-zh] { display: none; }
html[lang="zh"] .i18n[data-zh] { display: none; }

/* ---------- utilities ---------- */
/* Centred content column. Uses physical properties + max-width instead of
   margin-inline / min() so older browser cores (e.g. 360 browser built on
   Chromium < 87, which does not support logical properties or math
   functions) still centre the layout. With border-box this yields exactly
   min(100% - 40px, --container) of content width, centred. */
.container {
  width: 100%;
  max-width: calc(var(--container) + 40px);
  margin-left: auto;
  margin-right: auto;
  padding-left: 20px;
  padding-right: 20px;
}
.alla{width:800px;margin:auto;}
.txt-c { text-align: center; }
.uppercase { text-transform: uppercase; letter-spacing: .12em; }
.muted { color: var(--c-text-3); }
.accent { color: var(--c-green-600); }
.eyebrow {
  display: inline-block;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .22em;
  text-transform: uppercase;
  color: var(--c-green-600);
  padding: 6px 14px;
  background: var(--c-green-100);
  border: 1px solid rgba(22, 163, 74, .25);
  border-radius: 100px;
}

/* ---------- buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 13px 26px;
  border-radius: 100px;
  font-weight: 600;
  font-size: 15px;
  letter-spacing: .02em;
  transition: transform .25s var(--ease), box-shadow .25s var(--ease), background .25s var(--ease), color .25s var(--ease);
  white-space: nowrap;
  border: 1px solid transparent;
}
.btn-primary {
  background: linear-gradient(135deg, var(--c-green-500), var(--c-green-600));
  color: #fff;
  box-shadow: 0 8px 20px rgba(22, 163, 74, .35);
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 14px 28px rgba(22, 163, 74, .45);
  color: #fff;
}
.btn-ghost {
  background: rgba(255, 255, 255, .08);
  color: #fff;
  border-color: rgba(255, 255, 255, .35);
  backdrop-filter: blur(8px);
}
.btn-ghost:hover {
  background: #fff;
  color: var(--c-blue-800);
}
.btn-outline {
  border-color: var(--c-blue-700);
  color: var(--c-blue-700);
}
.btn-outline:hover {
  background: var(--c-blue-700);
  color: #fff;
}
.btn .icon { width: 16px; height: 16px; }

/* ---------- progress bar ---------- */
.scroll-progress {
  position: fixed;
  top: 0; left: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--c-green-500), var(--c-blue-500));
  z-index: 9999;
  width: 0%;
  transition: width .1s linear;
}

/* ---------- top info bar (contact strip above header) ---------- */
.top-info-bar {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: var(--tib-h);
  display: flex;
  align-items: center;
  justify-content: flex-start;
  background: linear-gradient(135deg, #1d4ed8 0%, #2563eb 55%, #1e40af 100%);
  color: #fff;
  font-size: 13.5px;
  z-index: 1100;
  overflow: hidden;
}
.tib-left {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: flex-start;
}
.tib-right { display: none; }
.tib-curves { display: none; }
.tib-inner {
  display: flex;
  align-items: center;
  justify-content:flex-start;
  width: 100%;
  height: 100%;
}
.tib-brand { font-size:20px; line-height:200%; margin-right:10px; width:320px;
 background: linear-gradient(90deg, #0d2866 0%, #132652 50%, #132652 100%); 
 height:72px; padding-top:13px; padding-right:50px;clip-path: polygon(0 0, 100% 0, 85% 100%, 0 100%);}
.tib-logo { float:left; display:inline;  margin-right:10px;width:80px; }
.tib-contacts {
  display: flex;
  align-items: center;
  justify-content: flex-start;
  list-style: none;
  margin: 0;
  padding: 0;
  gap:20px;
  min-width: 0;
}
.tib-item {
  display: flex;
  align-items: center;
  gap: 10px;
  min-width: auto;
}
.tib-icon {
  flex: 0 0 22px;
  width: 16px;
  height: 16px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: rgba(255,255,255,.85);
}
.tib-icon svg { width: 100%; height: 100%; }
.tib-text {line-height: 1.65;white-space: nowrap; }
.tib-label {
  font-size: 16px;
  color: rgba(255,255,255,.72);
  letter-spacing: .06em;
  text-transform: uppercase;
  font-weight: 600;
}
.tib-value {
  font-size: 16px;
  color: #fff;
  font-weight: 500;
  white-space111: nowrap;
  overflow11: hidden;
  text-overflow111: ellipsis;
  display: block;
  text-decoration: none;
}
a.tib-value:hover { color: var(--c-green-400); }
.tib-divider {
  flex: 0 0 1px;
  width: 1px;
  height: 38px;
  background: rgba(255,255,255,.28);
}
/* ---------- header ---------- */
.site-header {
  position: fixed;
  top: var(--tib-h, 0px);
  left: 0; right: 0;
  height: var(--header-h);
  z-index: 1000;
  background: rgba(12, 31, 77, .55);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid rgba(255, 255, 255, .08);
  transition: background .3s var(--ease), box-shadow .3s var(--ease);
}
.site-header.scrolled {
  background: rgba(12, 31, 77, .96);
  box-shadow: 0 6px 20px rgba(0, 0, 0, .25);
}
.header-inner {
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}
.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  color: #fff;
}
.brand-logo {
  height: 46px;
  width: auto;
  filter: brightness(1.05);
}
.brand-text {
  display: flex;
  flex-direction: column;
  line-height: 1.1;
}
.brand-text strong {
  font-size: 16px;
  letter-spacing: .02em;
}
.brand-text small {
  font-size: 11px;
  color: rgba(255, 255, 255, .65);
  letter-spacing: .14em;
  text-transform: uppercase;
  margin-top: 2px;
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 4px;
}
.main-nav a {
  color: #fff;
  font-size: 14.5px;
  font-weight: 500;
  padding: 10px 16px;
  border-radius: 8px;
  position: relative;
  letter-spacing: .01em;
}
.main-nav a:hover, .main-nav a.active {
  color: var(--c-green-400);
}
.main-nav a.active::after {
  content: "";
  position: absolute;
  bottom: 4px; left: 50%;
  transform: translateX(-50%);
  width: 18px; height: 2px;
  background: var(--c-green-400);
  border-radius: 2px;
}
.main-nav .has-sub { position: relative; }
.main-nav .submenu {
  position: absolute;
  top: 100%;
  left: 50%;
  transform: translateX(-50%) translateY(8px);
  background: #fff;
  min-width: 220px;
  padding: 8px;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  opacity: 0;
  visibility: hidden;
  transition: opacity .2s, transform .2s, visibility .2s;
  border-top: 3px solid var(--c-green-500);
}
.main-nav .has-sub:hover .submenu {
  opacity: 1;
  visibility: visible;
  transform: translateX(-50%) translateY(0);
}
.main-nav .submenu a {
  display: block;
  padding: 10px 14px;
  color: var(--c-text);
  font-size: 14px;
  border-radius: 6px;
}
.main-nav .submenu a:hover { background: var(--c-bg); color: var(--c-blue-600); }

.header-cta { display: flex; align-items: center; gap: 10px; }

/* language switcher */
.lang-switch {
  display: inline-flex;
  border: 1px solid rgba(255, 255, 255, .2);
  border-radius: 100px;
  padding: 3px;
  gap: 0;
  background: rgba(255, 255, 255, .04);
}
.lang-switch button {
  padding: 6px 12px;
  border-radius: 100px;
  font-size: 12.5px;
  font-weight: 600;
  letter-spacing: .04em;
  color: rgba(255, 255, 255, .7);
  transition: all .2s;
}
.lang-switch button.active {
  background: var(--c-green-500);
  color: #fff;
  box-shadow: 0 2px 8px rgba(34, 197, 94, .35);
}

.menu-toggle {
  display: none;
  width: 40px; height: 40px;
  color: #fff;
  align-items: center;
  justify-content: center;
}

/* ---------- HERO ---------- */
.hero {
  position: relative;
  min-height: 100vh;
  background: linear-gradient(135deg, #0c1f4d 0%, #1e3a8a 50%, #1d4ed8 100%);
  color: #fff;
  overflow: hidden;
  padding: calc(var(--tib-h) + var(--header-h) + 40px) 0 72px;
  display: flex;
  align-items: center; /* text is centred so it always overlaps the photo */
}
.hero::before {
  content: "";
  position: absolute;
  top: 0; right: 0; bottom: 0; left: 0;
  inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.04) 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: radial-gradient(ellipse at 50% 30%, #000 0%, #000 30%, transparent 75%);
  -webkit-mask-image: radial-gradient(ellipse at 50% 30%, #000 0%, #000 30%, transparent 75%);
}
.hero::after {
  content: "";
  position: absolute;
  right: -120px; top: 30%;
  width: 600px; height: 600px;
  background: radial-gradient(circle, rgba(34, 197, 94, .22) 0%, transparent 60%);
  filter: blur(40px);
}
.hero .container {
  position: relative;
  z-index: 5;
}
.hero-text {
  max-width: 940px;
  text-align: left;
  margin: 0;
  text-shadow: 0 2px 16px rgba(0,0,0,.35);
}
.hero-cta { justify-content: flex-start; }
.hero-stats { margin-left: 0; margin-right: 0; max-width: 860px; }
.hero h1 {
  font-size: 40px;
  line-height: 1.08;
  font-weight: 800;
  margin: 18px 0 22px;
  letter-spacing: -.02em;
}
.hero h1 .hl {
  color: var(--c-green-500);
  background: linear-gradient(135deg, #4ade80, #22c55e);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}
.hero p.lead {
  font-size: 18px;
  line-height: 1.7;
  color: rgba(255, 255, 255, .82);
  max-width: 620px;
  margin-bottom: 36px;
}
.hero-cta { display: flex; flex-wrap: wrap; gap: 14px; margin-bottom: 56px; }
.hero-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  border-top: 1px solid rgba(255, 255, 255, .12);
  padding-top: 28px;
  max-width: 720px;
}
.hero-stats .item strong {
  display: block;
  font-size: 40px;
  font-weight: 800;
  color: #fff;
  line-height: 1;
  letter-spacing: -.02em;
}
.hero-stats .item strong em {
  font-style: normal;
  color: var(--c-green-400);
  font-size: 22px;
  margin-left: 2px;
}
.hero-stats .item span {
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: .14em;
  color: rgba(255, 255, 255, .55);
  margin-top: 6px;
  display: block;
}

/* Hero visual — full-bleed photo layer that the headline text overlaps */
.hero-visual {
  position: absolute;
  top: 0; right: 0; bottom: 0; left: 0;
  inset: 0;
  z-index: 1;
  max-width: none;
  margin: 0;
  pointer-events: none;
}
.hero-gallery {
  position: absolute;
  top: 0; right: 0; bottom: 0; left: 0;
  inset: 0;
  width: 100%;
  height: 100%;
  aspect-ratio: auto;
  border-radius: 0;
  overflow: hidden;
  box-shadow: none;
  background: linear-gradient(135deg, #0b2545, #12275c);
  pointer-events: auto;
}
.hero-slide {
  position: absolute;
  top: 0; right: 0; bottom: 0; left: 0;
  inset: 0;
  z-index: 1;
  opacity: 0;
  transform: scale(1.06);
  clip-path: circle(0% at 50% 50%);
  transition: opacity 1s ease, transform 1.4s cubic-bezier(.2,.7,.2,1), clip-path 1.4s cubic-bezier(.2,.7,.2,1);
  pointer-events: none;
}
/* readability scrim: strongest on the left where the headline sits, fades to transparent on the right so the photo shows through */
.hero-slide::before {
  content: "";
  position: absolute;
  top: 0; right: 0; bottom: 0; left: 0;
  inset: 0;
  z-index: 3;
  pointer-events: none;
  background: linear-gradient(to right,
    rgba(7,26,54,.85) 0%,
    rgba(7,26,54,.68) 30%,
    rgba(7,26,54,.38) 60%,
    rgba(7,26,54,.12) 100%);
}
.hero-slide.active {
  opacity: 1;
  z-index: 2;
  transform: scale(1);
  clip-path: circle(150% at 50% 50%);
}
.hero-slide.leaving {
  opacity: 0;
  transform: scale(0.94) translateX(-30px);
  clip-path: circle(0% at 100% 50%);
  transition: opacity .9s ease, transform 1.3s cubic-bezier(.4,.0,.2,1), clip-path 1.3s cubic-bezier(.4,.0,.2,1);
}
.hero-slide img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
  display: block;
  transform: scale(1);
}
.hero-slide.active img {
  animation: kenburns 9s ease-out forwards;
}
@keyframes kenburns {
  from { transform: scale(1) translate(0, 0); }
  to   { transform: scale(1.04) translate(-0.6%, -0.4%); }
}
/* diagonal light sweep on enter */
.hero-slide::after {
  content: "";
  position: absolute;
  top: 0; right: 0; bottom: 0; left: 0;
  inset: 0;
  background: linear-gradient(110deg, transparent 35%, rgba(255,255,255,.22) 50%, transparent 65%);
  transform: translateX(-110%);
  pointer-events: none;
  z-index: 2;
}
.hero-slide.active::after {
  animation: sweep 1.5s ease-out .3s forwards;
}
@keyframes sweep {
  from { transform: translateX(-110%); }
  to   { transform: translateX(120%); }
}
.hero-caption {
  position: absolute;
  left: 16px;
  bottom: 16px;
  padding: 7px 14px;
  background: rgba(7,26,54,.72);
  color: #fff;
  font-size: 13px;
  font-weight: 500;
  letter-spacing: .02em;
  border-radius: 999px;
  border: 1px solid rgba(255,255,255,.16);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  z-index: 4;
  opacity: 0;
  transform: translateY(10px);
  transition: opacity .6s ease .85s, transform .6s cubic-bezier(.2,.7,.2,1) .85s;
}
.hero-slide.active .hero-caption {
  opacity: 1;
  transform: translateY(0);
}
/* progress-bar dots */
.hero-dots {
  position: absolute;
  right: 16px;
  bottom: 18px;
  display: flex;
  gap: 8px;
  z-index: 4;
}
.hero-dots button {
  width: 40px;
  height: 3px;
  border: 0;
  border-radius: 4px;
  background: rgba(255,255,255,.3);
  cursor: pointer;
  padding: 0;
  position: relative;
  overflow: hidden;
}
.hero-dots button::after {


  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 0;
  background: var(--c-green-400);
  transition: width .25s;
}
.hero-dots button.active::after {
  width: 100%;
  animation: dot-fill var(--slide-speed, 3.2s) linear forwards;
}
@keyframes dot-fill {
  from { width: 0; }
  to   { width: 100%; }
}

/* IP callout strip (used between sections) */
.ip-callout {
  background: linear-gradient(135deg, var(--c-blue-700), var(--c-blue-500));
  border-radius: var(--radius-xl);
  padding: 36px 48px;
  display: flex;
  align-items: center;
  gap: 32px;
  color: #fff;
  position: relative;
  overflow: hidden;
}
.ip-callout::before {
  content: "";
  position: absolute;
  right: -80px; top: -80px;
  width: 320px; height: 320px;
  background: radial-gradient(circle, rgba(34,197,94,.2) 0%, transparent 60%);
}
.ip-callout .ip {
  width: 110px;
  flex-shrink: 0;
  filter: drop-shadow(0 10px 24px rgba(0,0,0,.3));
  position: relative;
  z-index: 1;
}
.ip-callout .text { flex: 1; position: relative; z-index: 1; }
.ip-callout h4 { font-size: 20px; font-weight: 700; margin: 0 0 4px; }
.ip-callout p { margin: 0; color: rgba(255,255,255,.85); font-size: 14.5px; line-height: 1.6; }

/* ---------- section base ---------- */
.section { padding: 110px 0; }
.sectionb{ margin-bottom:110px;}
.section.tight { padding: 80px 0; }
.section.bg { background: var(--c-bg); }
.section.dark { background: linear-gradient(135deg, var(--c-blue-900), var(--c-blue-800)); color: #fff; }
.section-head { text-align: center; max-width: 720px; margin: 0 auto 60px; }
.section-head h2 {
  font-size:36px;
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -.02em;
  margin: 16px 0 14px;
}
.section-head p { color: var(--c-text-2); font-size: 16px; }
.section-head h2 + p { margin: 0; }
.section.dark .section-head p { color: rgba(255, 255, 255, .72); }

/* ---------- trust bar ---------- */
.trust {
  background: #fff;
  padding: 28px 0;
  border-top: 1px solid var(--c-border);
  border-bottom: 1px solid var(--c-border);
}
.trust .label {
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: .2em;
  color: var(--c-text-3);
  text-align: center;
  margin-bottom: 18px;
}
.trust ul {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 30px;
}
.trust ul li {
  font-weight: 700;
  font-size: 17px;
  color: var(--c-text-2);
  letter-spacing: .04em;
  display: flex;
  align-items: center;
  gap: 8px;
  filter: grayscale(.2);
  opacity: .9;
}

/* ---------- why cards ---------- */
.why-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}
.why-card {
  background: #fff;
  border: 1px solid var(--c-border);
  border-radius: var(--radius-lg);
  padding: 32px 28px;
  position: relative;
  transition: transform .35s var(--ease), box-shadow .35s var(--ease), border-color .35s;
  overflow: hidden;
}
.why-card::before {
  content: "";
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--c-blue-600), var(--c-green-500));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform .4s var(--ease);
}
.why-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); border-color: transparent; }
.why-card:hover::before { transform: scaleX(1); }
.why-card .icon {
  width: 56px; height: 56px;
  border-radius: 12px;
  background: linear-gradient(135deg, rgba(29, 78, 216, .1), rgba(34, 197, 94, .1));
  color: var(--c-blue-600);
  display: grid;
  place-items: center;
  margin-bottom: 22px;
}
.why-card h3 { font-size: 19px; font-weight: 700; margin: 0 0 10px; }

.why-card p { color: var(--c-text-2); font-size: 14.5px; line-height: 1.7; margin: 0; }
.why-card .num {
  position: absolute;
  top: 24px; right: 28px;
  font-size: 14px;
  font-weight: 800;
  color: var(--c-green-600);
  letter-spacing: .04em;
}

/* ---------- product tabs ---------- */
.product-tabs {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 40px;
}
.product-tabs button {
  padding: 11px 22px;
  border-radius: 100px;
  font-size: 14px;
  font-weight: 600;
  background: #fff;
  color: var(--c-text-2);
  border: 1px solid var(--c-border);
  transition: all .25s var(--ease);
}
.product-tabs button:hover { color: var(--c-blue-600); border-color: var(--c-blue-600); }
.product-tabs button.active {
  background: var(--c-blue-700);
  color: #fff;
  border-color: var(--c-blue-700);
}

.product-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}
.product-card {
  background: #fff;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--c-border);
  transition: transform .35s var(--ease), box-shadow .35s var(--ease);
  display: flex;
  flex-direction: column;
}
.product-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); border-color: var(--c-blue-100); }
.product-card .img {
  aspect-ratio: 4 / 3;
  background: linear-gradient(135deg, #f1f5f9, #e2e8f0);
  position: relative;
  overflow: hidden;
}
.product-card .img img { width: 100%; height: 100%; object-fit: cover; transition: transform .6s var(--ease); }
.product-card:hover .img img { transform: scale(1.06); }
.product-card .badge {
  position: absolute;
  top: 14px; left: 14px;
  background: rgba(12, 31, 77, .92);
  color: #fff;
  font-size: 11px;
  font-weight: 700;
  padding: 5px 10px;
  border-radius: 4px;
  letter-spacing: .04em;
}
.product-card .body { padding: 22px 22px 24px; display: flex; flex-direction: column; flex: 1; }
.product-card h3 { font-size: 18px; font-weight: 700; margin: 0 0 4px; }
.product-card .formula {
  font-family: "SF Mono", Menlo, Consolas, monospace;
  font-size: 12.5px;
  color: var(--c-blue-600);
  font-weight: 600;
  letter-spacing: .04em;
  margin-bottom: 10px;
}
.product-card p { font-size: 13.5px; color: var(--c-text-2); margin: 0 0 16px; line-height: 1.6; flex: 1; }
.product-card .meta { display: flex; gap: 8px; flex-wrap: wrap; margin-bottom: 16px; }
.product-card .meta span {
  font-size: 11px;
  background: var(--c-bg);
  color: var(--c-text-2);
  padding: 4px 10px;
  border-radius: 100px;
  font-weight: 600;
  letter-spacing: .02em;
}
.product-card .actions { display: flex; gap: 8px; }
.product-card .actions a {
  flex: 1;
  text-align: center;
  padding: 9px 12px;
  border-radius: 6px;
  font-size: 13px;
  font-weight: 600;
  border: 1px solid var(--c-border);
  color: var(--c-text);
  transition: all .2s;
}
.product-card .actions a.primary { background: var(--c-blue-700); color: #fff; border-color: var(--c-blue-700); }
.product-card .actions a.primary:hover { background: var(--c-green-600); border-color: var(--c-green-600); color: #fff; }
.product-card .actions a:hover { background: var(--c-bg); color: var(--c-blue-600); }

/* ---------- about / company band ---------- */
.about-band {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
}
.about-band .visual {
  position: relative;
  border-radius: var(--radius-xl);
  overflow: hidden; background:url(gs.jpg) no-repeat right bottom;
  aspect-ratio: 4 / 3;
  display: grid;
  place-items: center;
  color: #fff;
}
.about-band .visual::before {
  content: "";
  position: absolute;
  top: 0; right: 0; bottom: 0; left: 0;
  inset: 0;
  background-image: linear-gradient(rgba(255,255,255,.06) 1px, transparent 1px);
  background-size: 30px 30px;
}
.about-band .visual .stat {
  position: relative;
  z-index: 1;
  text-align: center;
}
.about-band .visual .stat strong {
  display: block;
  font-size: 92px;
  font-weight: 800;
  line-height: 1;
  color: var(--c-green-400);
  letter-spacing: -.03em;
}
.about-band .visual .stat span {
  font-size: 16px;
  text-transform: uppercase;
  letter-spacing: .18em;
  color: rgba(255, 255, 255, .8);
  margin-top: 8px;
  display: block;
}
.about-band .visual .corner {
  position: absolute;
  bottom: 24px; left: 24px;
  z-index: 1;
  font-size: 13px;
  color: rgba(255, 255, 255, .75);
  letter-spacing: .12em;
  text-transform: uppercase;
}
.about-band .visual .ip-mark {
  position: absolute;
  right: 18px; bottom: 18px;
  width: 90px;
  z-index: 1;
  filter: drop-shadow(0 8px 16px rgba(0,0,0,.3));
}
.about-band h2 {
  font-size: 34px;
  font-weight: 800;
  line-height: 1.2;
  letter-spacing: -.02em;
  margin: 14px 0 20px;
}
.about-band p { color: var(--c-text-2); font-size: 15.5px; line-height: 1.8; margin: 0 0 14px; }
.about-band .features {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin: 24px 0 32px;
}
.about-band .features li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 14px;
  color: var(--c-text);
  font-weight: 500;
}
.about-band .features li::before {
  content: "";
  flex-shrink: 0;
  width: 18px; height: 18px;
  border-radius: 50%;
  background: var(--c-success) url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='white' stroke-width='3' stroke-linecap='round' stroke-linejoin='round'><polyline points='20 6 9 17 4 12'/></svg>") center/12px no-repeat;
  margin-top: 2px;
}

/* ---------- data strip ---------- */
.data-strip {
  background: linear-gradient(135deg, var(--c-blue-900), var(--c-blue-800));
  color: #fff;
  padding: 80px 0;
  position: relative;
  overflow: hidden;
}
.data-strip::before {
  content: "";
  position: absolute;
  top: 0; right: 0; bottom: 0; left: 0;
  inset: 0;
  background: radial-gradient(circle at 20% 30%, rgba(34, 197, 94, .18) 0%, transparent 50%);
}
.data-strip .container { position: relative; }
.data-strip .grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 40px;
}
.data-strip .item { text-align: center; }
.data-strip .item strong {
  font-size: 60px;
  font-weight: 800;
  letter-spacing: -.02em;
  line-height: 1;
  display: block;
  background: linear-gradient(135deg, #4ade80, #22c55e);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}
.data-strip .item strong em { font-style: normal; font-size: 28px; margin-left: 2px; }
.data-strip .item span {
  display: block;
  margin-top: 10px;
  font-size: 14px;
  color: rgba(255, 255, 255, .72);
  letter-spacing: .04em;
}

/* ---------- applications ---------- */
.app-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}
.app-card {
  background: #fff;
  border: 1px solid var(--c-border);
  border-radius: var(--radius-md);
  padding: 26px 24px;
  display: flex;
  align-items: flex-start;
  gap: 16px;
  transition: all .3s var(--ease);
}
.app-card:hover {
  border-color: var(--c-blue-600);
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}
.app-card .icon {
  flex-shrink: 0;
  width: 48px; height: 48px;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--c-green-600), var(--c-green-700));
  display: grid;
  place-items: center;
  color: #fff;
}
.app-card h4 { font-size: 16px; font-weight: 700; margin: 0 0 6px; }
.app-card p { font-size: 13.5px; color: var(--c-text-2); margin: 0; line-height: 1.6; }

/* ---------- video block ---------- */
.video-block {
  position: relative;
  border-radius: var(--radius-xl);
  overflow: hidden;
  background: linear-gradient(135deg, var(--c-blue-900), var(--c-blue-700));
  aspect-ratio: 16 / 8;
  display: grid;
  align-items: center;
  justify-items: center;
  color: #fff;
  text-align: center;
}
.video-inner {
  position: absolute;
  top: 0; right: 0; bottom: 0; left: 0;
  width: 100%;
  height: 100%;
  display: grid;
  align-items: center;
  justify-items: center;
  z-index: 1;
}
.video-block::before {
  content: "";
  position: absolute;
  top: 0; right: 0; bottom: 0; left: 0;
  inset: 0;
  background: radial-gradient(circle at 70% 50%, rgba(34, 197, 94, .25) 0%, transparent 50%);
}
.video-block .play {
  position: relative;
  z-index: 1;
  width: 96px; height: 96px;
  border-radius: 50%;
  background: rgba(255, 255, 255, .15);
  border: 1px solid rgba(255, 255, 255, .4);
  backdrop-filter: blur(8px);
  display: grid;
  align-items: center;
  justify-items: center;
  color: #fff;
  transition: transform .3s;
  cursor: pointer;
  margin: 0 auto 18px;
}
.video-block .play:hover { transform: scale(1.08); }
.video-block .play svg { margin-left: 4px; }
.video-block h3 {
  position: relative;
  z-index: 1;
  font-size: 26px;
  font-weight: 700;
  margin: 0 0 6px;
}
.video-block p { position: relative; z-index: 1; color: rgba(255, 255, 255, .8); margin: 0; }

/* ---------- cert / qualification ---------- */
.qual-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.qual-card {
  background: #fff;
  border: 1px solid var(--c-border);
  border-radius: var(--radius-md);
  padding: 28px 24px;
  text-align: center;
  transition: all .3s var(--ease);
}
.qual-card:hover { box-shadow: var(--shadow-md); border-color: var(--c-blue-600); }
.qual-card .badge {
  width: 72px; height: 72px;
  margin: 0 auto 16px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--c-blue-700), var(--c-green-500));
  display: grid;
  place-items: center;
  color: #fff;
  font-weight: 800;
  font-size: 18px;
  letter-spacing: .04em;
}
.qual-card h4 { font-size: 17px; font-weight: 700; margin: 0 0 8px; }
.qual-card p { font-size: 13.5px; color: var(--c-text-2); margin: 0; line-height: 1.6; }

/* ---------- SDS table ---------- */
.sds-list {
  background: #fff;
  border-radius: var(--radius-lg);
  border: 1px solid var(--c-border);
  overflow: hidden;
}
.sds-list .row {
  display: grid;
  grid-template-columns: 60px 1.4fr 1fr .8fr .8fr 130px;
  gap: 16px;
  align-items: center;
  padding: 18px 24px;
  border-bottom: 1px solid var(--c-border);
  transition: background .2s;
}
.sds-list .row:hover { background: var(--c-bg); }
.sds-list .row:last-child { border-bottom: none; }
.sds-list .row.head {
  background: var(--c-bg);
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: .14em;
  color: var(--c-text-3);
  font-weight: 700;
  padding: 14px 24px;
}
.sds-list .row .num {
  width: 38px; height: 38px;
  border-radius: 8px;
  background: var(--c-blue-100);
  color: var(--c-blue-700);
  display: grid;
  place-items: center;
  font-weight: 700;
  font-family: "SF Mono", monospace;
  font-size: 14px;
}
.sds-list .row strong { font-size: 15.5px; font-weight: 600; color: var(--c-text); }
.sds-list .row .formula { font-family: "SF Mono", monospace; font-size: 13.5px; color: var(--c-text-2); }
.sds-list .row .pill {
  display: inline-block;
  font-size: 11.5px;
  font-weight: 600;
  padding: 4px 10px;
  border-radius: 100px;
  background: var(--c-green-100);
  color: var(--c-green-700);
  letter-spacing: .04em;
}
.sds-list .row .btn-download {
  background: var(--c-blue-700);
  color: #fff;
  padding: 9px 18px;
  border-radius: 6px;
  font-size: 13px;
  font-weight: 600;
  text-align: center;
  transition: background .2s;
}
.sds-list .row .btn-download:hover { background: var(--c-green-600); color: #fff; }

/* ---------- news ---------- */
.news-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr;
  gap: 24px;
}
.news-card {
  background: #fff;
  border-radius: var(--radius-lg);
  border: 1px solid var(--c-border);
  overflow: hidden;
  transition: all .3s var(--ease);
  display: flex;
  flex-direction: column;
}
.news-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }
.news-card .cover {
  aspect-ratio: 16 / 9;
  background: linear-gradient(135deg, var(--c-blue-800), var(--c-blue-600));
  position: relative;
  overflow: hidden;
  display: grid;
  place-items: center;
  color: #fff;
}
.news-card .cover::after {
  content: "";
  position: absolute;
  top: 0; right: 0; bottom: 0; left: 0;
  inset: 0;
  background: linear-gradient(180deg, transparent 50%, rgba(12, 31, 77, .65));
}
.news-card .cover .icon { width: 64px; height: 64px; opacity: .5; z-index: 1; }
.news-card .cover .date {
  position: absolute;
  top: 18px; left: 18px;
  z-index: 2;
  background: var(--c-green-500);
  color: #fff;
  padding: 6px 12px;
  border-radius: 6px;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .04em;
}
.news-card .cover .category {
  position: absolute;
  bottom: 18px; left: 18px;
  z-index: 2;
  color: #fff;
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .18em;
  background: rgba(12, 31, 77, .7);
  padding: 4px 10px;
  border-radius: 4px;
}
.news-card.featured { grid-row: span 2; }
.news-card.featured .cover { aspect-ratio: 4 / 5; }
.news-card.featured .body { padding: 28px 28px 32px; }
.news-card.featured h3 { font-size: 22px; }
.news-card .body { padding: 22px; flex: 1; display: flex; flex-direction: column; }
.news-card .body .meta { display: flex; gap: 12px; color: var(--c-text-3); font-size: 12.5px; margin-bottom: 10px; }
.news-card h3 { font-size: 17px; font-weight: 700; line-height: 1.4; margin: 0 0 8px; }
.news-card.featured h3 { font-size: 22px; }
.news-card p { color: var(--c-text-2); font-size: 14px; line-height: 1.65; margin: 0; }
.news-card .read-more {
  margin-top: auto;
  padding-top: 14px;
  color: var(--c-blue-600);
  font-weight: 600;
  font-size: 13.5px;
}

/* ---------- contact ---------- */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.3fr;
  gap: 48px;
  background: #fff;
  border-radius: var(--radius-xl);
  padding: 48px;
  box-shadow: var(--shadow-md);
  border: 1px solid var(--c-border);
}
.contact-info h3 { font-size: 24px; font-weight: 700; margin: 0 0 24px; }
.contact-info ul li {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  padding: 16px 0;
  border-bottom: 1px solid var(--c-border);
}
.contact-info ul li:last-child { border-bottom: none; }
.contact-info .icon {
  flex-shrink: 0;
  width: 44px; height: 44px;
  border-radius: 10px;
  background: linear-gradient(135deg, rgba(29, 78, 216, .1), rgba(34, 197, 94, .1));
  color: var(--c-blue-600);
  display: grid;
  place-items: center;
}
.contact-info .label {
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: .14em;
  color: var(--c-text-3);
  font-weight: 600;
  margin-bottom: 4px;
}
.contact-info .value { font-size: 15.5px; color: var(--c-text); font-weight: 500; }
.contact-info .value a:hover { color: var(--c-blue-600); }

.form-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}
.form-grid .full { grid-column: span 2; }
.form-grid label {
  display: block;
  font-size: 13px;
  font-weight: 600;
  color: var(--c-text-2);
  margin-bottom: 6px;
}
.form-grid input, .form-grid select, .form-grid textarea {
  width: 100%;
  padding: 13px 16px;
  border: 1px solid var(--c-border);
  border-radius: 8px;
  font-size: 14.5px;
  font-family: inherit;
  background: #fff;
  color: var(--c-text);
  transition: border-color .2s, box-shadow .2s;
}
.form-grid input:focus, .form-grid select:focus, .form-grid textarea:focus {
  outline: none;
  border-color: var(--c-blue-600);
  box-shadow: 0 0 0 4px rgba(29, 78, 216, .12);
}
.form-grid textarea { min-height: 120px; resize: vertical; }

/* ---------- CTA banner ---------- */
.cta-banner {
  background: linear-gradient(135deg, var(--c-blue-900) 0%, var(--c-blue-800) 45%, var(--c-blue-700) 100%);
  border-radius: var(--radius-xl);
  padding: 60px;
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 40px;
  flex-wrap: wrap;
  position: relative;
  overflow: hidden;
}
.cta-banner::before {
  content: "";
  position: absolute;
  right: -100px; top: -100px;
  width: 400px; height: 400px;
  background: radial-gradient(circle, rgba(34, 197, 94, .22) 0%, transparent 60%);
  filter: blur(20px);
}
.cta-banner h3 {
  font-size: 28px;
  font-weight: 800;
  line-height: 1.2;
  letter-spacing: -.01em;
  margin: 0 0 8px;
  position: relative;
}
.cta-banner p { color: rgba(255, 255, 255, .78); margin: 0; position: relative; }

/* ---------- footer ---------- */
.site-footer {
  background: #0d2150;
  color: rgba(255, 255, 255, 1);
  padding: 80px 0 0;
  position: relative;
  overflow: hidden;
}
.site-footer::before {
  content: "";
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(34, 197, 94, .4), transparent);
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1.4fr;
  gap: 48px;
  margin-bottom: 56px;
}
.footer-col h5 {
  color: #fff;
  font-size: 14px;
  text-transform: uppercase;
  letter-spacing: .18em;
  margin: 0 0 22px;
  font-weight: 700;
}
.footer-brand .brand { margin-bottom: 18px; }
.footer-brand .brand-logo { height: 80px; }
.footer-brand p { font-size: 14px; line-height: 1.7; margin: 0 0 18px; }
.footer-col ul li { margin-bottom: 10px; }
.footer-col ul li a { font-size: 14px; }
.footer-col ul li a:hover { color: var(--c-green-400); }
.footer-col address {
  font-style: normal;
  font-size: 14px;
  line-height: 1.8;
}
.footer-col address strong { color: #fff; }
.footer-social { display: flex; gap: 10px; margin-top: 16px; }
.footer-social a {
  width: 38px; height: 38px;
  border-radius: 50%;
  background: rgba(255, 255, 255, .06);
  border: 1px solid rgba(255, 255, 255, .08);
  display: grid;
  place-items: center;
  color: rgba(255, 255, 255, .7);
  transition: all .2s;
}
.footer-social a:hover { background: var(--c-green-500); color: #fff; border-color: var(--c-green-500); }
.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, .08);
  padding: 22px 0;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  font-size: 13px;
  color: rgba(255, 255, 255, .5);
}
/* ---------- page header ( inner pages) ---------- */
.page-header {
  background: linear-gradient(135deg, var(--c-blue-900) 0%, var(--c-blue-800) 50%, var(--c-blue-700) 100%);
  color: #fff;
  padding: calc(var(--tib-h) + var(--header-h) + 40px) 0 80px;
  position: relative;
  overflow: hidden;
}
.page-header::before {
  content: "";
  position: absolute;
  top: 0; right: 0; bottom: 0; left: 0;
  inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.04) 1px, transparent 1px);
  background-size: 50px 50px;
  mask-image: radial-gradient(ellipse at 50% 30%, #000 0%, transparent 70%);
  -webkit-mask-image: radial-gradient(ellipse at 50% 30%, #000 0%, transparent 70%);
}
.page-header h1 {
  font-size: 42px;
  font-weight: 800;
  margin: 14px 0 12px;
  letter-spacing: -.02em;
  position: relative;
}
.page-header p { color: rgba(255, 255, 255, .7); max-width: 640px; position: relative; }
.breadcrumb {
  display: flex;
  gap: 8px;
  font-size: 13.5px;
  color: rgba(255, 255, 255, .6);
  position: relative;
}
.breadcrumb a:hover { color: var(--c-green-400); }
.breadcrumb .sep { color: rgba(255, 255, 255, .3); }

/* ---------- product detail ---------- */
.pd-layout {
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: 64px;
  align-items: flex-start;
}
.pd-gallery {
  position: sticky;
  top: calc(var(--header-h) + 24px);
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: linear-gradient(135deg, #f1f5f9, #e2e8f0);
  aspect-ratio: 4 / 3;
}
.pd-gallery img { width: 100%; height: 100%; object-fit: cover; }
.pd-info h1 { font-size: 34px; font-weight: 800; margin: 0 0 8px; letter-spacing: -.01em; }
.pd-info .formula {
  font-family: "SF Mono", monospace;
  font-size: 18px;
  color: var(--c-blue-600);
  font-weight: 600;
  margin-bottom: 18px;
}
.pd-info .desc { color: var(--c-text-2); font-size: 15.5px; line-height: 1.8; margin-bottom: 28px; }
.pd-specs {
  border: 1px solid var(--c-border);
  border-radius: var(--radius-md);
  overflow: hidden;
  margin-bottom: 28px;
}
.pd-specs .row {
  display: grid;
  grid-template-columns: 180px 1fr;
  gap: 12px;
  padding: 14px 20px;
  border-bottom: 1px solid var(--c-border);
  font-size: 14.5px;
}
.pd-specs .row:last-child { border-bottom: none; }
.pd-specs .row:nth-child(odd) { background: var(--c-bg); }
.pd-specs .row .k { font-weight: 600; color: var(--c-text-2); }
.pd-specs .row .v { color: var(--c-text); font-weight: 500; }
.pd-actions { display: flex; gap: 12px; flex-wrap: wrap; }

/* ---------- reveal animation ---------- */
.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity .7s var(--ease), transform .7s var(--ease);
}
.reveal.in {
  opacity: 1;
  transform: translateY(0);
}

/* ---------- legacy fallbacks: aspect-ratio (Chromium < 88, old 360 cores) ---------- */
/* Modern browsers ignore this block (@supports evaluates to false);
   older cores get fixed heights so media boxes never collapse. */
@supports not (aspect-ratio: 1 / 1) {
  .product-card .img { height: 220px; }
  .about-band .visual { min-height: 400px; }
  .video-block { height: 420px; }
  .news-card .cover { height: 200px; }
  .news-card.featured .cover { height: 420px; }
  .pd-gallery { min-height: 320px; }
  @media (max-width: 1100px) {
    .news-card.featured .cover { height: 320px; }
  }
  @media (max-width: 768px) {
    .product-card .img { height: 240px; }
    .about-band .visual { min-height: 300px; }
    .video-block { height: 340px; }
    .news-card.featured .cover { height: 240px; }
  }
}

/* ---------- responsive ---------- */
@media (max-width: 1100px) {
  .product-grid, .why-grid, .app-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 36px; }
  .data-strip .grid { grid-template-columns: repeat(2, 1fr); gap: 36px; }
  .qual-grid { grid-template-columns: repeat(2, 1fr); }
  .about-band { grid-template-columns: 1fr; gap: 40px; }
  .news-grid { grid-template-columns: 1fr 1fr; }
  .news-card.featured { grid-row: auto; grid-column: span 2; }
  .news-card.featured .cover { aspect-ratio: 16 / 8; }
  .contact-grid { grid-template-columns: 1fr; padding: 32px; }
  .pd-layout { grid-template-columns: 1fr; gap: 40px; }
  .pd-gallery { position: static; }
  .sds-list .row { grid-template-columns: 50px 1.4fr 1fr 100px; }
  .sds-list .row .hide-tablet, .sds-list .row .hide-tablet-2 { display: none; }
  .ip-callout { padding: 24px 28px; gap: 20px; }
  .ip-callout .ip { width: 80px; }
}
@media (max-width: 960px) {
  .hero .container { grid-template-columns: 1fr; gap: 40px; }
  .hero-visual { max-width: 380px; margin: 0 auto; }
}
@media (max-width: 768px) {
  :root { --header-h: 64px; --tib-h: 0px; }
  .top-info-bar { display: none; }
  .main-nav { display: none; }
  .lang-switch { display: none; }
  .menu-toggle { display: flex; }
  .main-nav.open {
    display: flex;
    position: absolute;
    top: 100%;
    left: 0; right: 0;
    background: var(--c-blue-900);
    flex-direction: column;
    padding: 16px;
    gap: 0;
    align-items: stretch;
    border-top: 1px solid rgba(255, 255, 255, .08);
  }
  .main-nav.open > a { padding: 14px 16px; border-bottom: 1px solid rgba(255, 255, 255, .06); }
  .main-nav.open .submenu { position: static; transform: none; opacity: 1; visibility: visible; box-shadow: none; background: transparent; border: none; padding: 0 0 8px 16px; min-width: 0; }
  .main-nav.open .submenu a { color: rgba(255, 255, 255, .8); padding: 10px 16px; }
  .header-cta .btn { padding: 9px 16px; font-size: 13px; }
  .brand-text small { display: none; }
  .section { padding: 70px 0; }
  .hero { padding: calc(var(--tib-h) + var(--header-h) + 24px) 0 60px; }
  .hero h1 { font-size: 32px; }
  .hero p.lead { font-size: 16px; }
  .section-head h2 { font-size: 28px; }
  .about-band h2 { font-size: 26px; }
  .cta-banner h3 { font-size: 24px; }
  .page-header h1 { font-size: 30px; }
  .pd-info h1 { font-size: 28px; }
  .hero-stats { grid-template-columns: repeat(2, 1fr); gap: 18px; }
  .hero-stats .item strong { font-size: 32px; }
  .product-grid, .why-grid, .app-grid, .qual-grid { grid-template-columns: 1fr; }
  .data-strip .grid { grid-template-columns: 1fr 1fr; }
  .data-strip .item strong { font-size: 44px; }
  .news-grid { grid-template-columns: 1fr; }
  .news-card.featured { grid-column: auto; }
  .contact-grid { padding: 24px; }
  .form-grid { grid-template-columns: 1fr; }
  .form-grid .full { grid-column: auto; }
  .cta-banner { padding: 36px 24px; }
  .footer-grid { grid-template-columns: 1fr; gap: 32px; }
  .about-band .features { grid-template-columns: 1fr; }
  .sds-list .row { grid-template-columns: 1fr; gap: 6px; padding: 16px 18px; }
  .sds-list .row .num { display: none; }
  .sds-list .row.head { display: none; }
  .sds-list .row > a { justify-self: flex-start; }
  .pd-specs .row { grid-template-columns: 1fr; gap: 2px; }
  .footer-bottom { justify-content: center; text-align: center; }
  .ip-callout { flex-direction: column; text-align: center; }
  .ip-callout .ip { width: 90px; }
}

.containerdt{border-radius:20px; overflow:hidden; max-width:1240px; margin:auto;}