/* =========================================================
   PNG 庞巨精密 — 官方网站
   依据《PNG庞巨画册 2026版》品牌与产品体系
   ========================================================= */

:root {
  --png-red: #d4000f;
  --png-red-dark: #a8000c;
  --png-red-soft: #ffecee;
  --ink: #1a1a1a;
  --ink-2: #333;
  --muted: #6b7280;
  --line: #e5e7eb;
  --bg: #ffffff;
  --bg-soft: #f7f8fa;
  --bg-dark: #141414;
  --bg-dark-2: #1f1f1f;
  --white: #fff;
  --shadow-sm: 0 1px 3px rgba(0,0,0,.06);
  --shadow-md: 0 10px 30px rgba(0,0,0,.08);
  --shadow-lg: 0 20px 50px rgba(0,0,0,.12);
  --radius: 10px;
  --header-h: 78px;
  --max: 1180px;
  --font: "Noto Sans SC", "Noto Sans", "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
  --ease: cubic-bezier(.22,1,.36,1);
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
html[data-lang="en"] body {
  font-family: "Noto Sans", "Noto Sans SC", system-ui, sans-serif;
}
body {
  font-family: var(--font);
  color: var(--ink);
  background: var(--bg);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
img { max-width: 100%; display: block; height: auto; }
a { color: inherit; text-decoration: none; }
button { font-family: inherit; cursor: pointer; border: none; background: none; }
ul { list-style: none; }
input, textarea, select { font-family: inherit; font-size: 1rem; }

.container { width: min(100% - 2rem, var(--max)); margin-inline: auto; }

/* Top bar */
.topbar {
  background: var(--bg-dark);
  color: #cfcfcf;
  font-size: .8rem;
}
.topbar-inner {
  min-height: 36px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
  padding: .35rem 0;
}
.topbar a:hover { color: #fff; }
.topbar-left, .topbar-right { display: flex; gap: 1rem; flex-wrap: wrap; align-items: center; }
.topbar .sep { opacity: .35; }
.topbar-right { margin-left: auto; }

.lang-switch {
  display: inline-flex;
  align-items: stretch;
  border: 1px solid rgba(255,255,255,.22);
  border-radius: 999px;
  overflow: hidden;
  background: rgba(255,255,255,.06);
  flex-shrink: 0;
}
.lang-switch button {
  min-width: 2.35rem;
  padding: .22rem .62rem;
  font-size: .72rem;
  font-weight: 700;
  letter-spacing: .04em;
  color: #cfcfcf;
  line-height: 1.2;
}
.lang-switch button + button { border-left: 1px solid rgba(255,255,255,.16); }
.lang-switch button.is-active {
  background: var(--png-red);
  color: #fff;
}
.lang-switch button:hover:not(.is-active) { color: #fff; background: rgba(255,255,255,.1); }

.header-tools {
  display: flex;
  align-items: center;
  gap: .7rem;
  flex-shrink: 0;
}
.header-tools .lang-switch {
  border-color: var(--line);
  background: #fff;
}
.header-tools .lang-switch button { color: var(--ink-2); }
.header-tools .lang-switch button + button { border-left-color: var(--line); }
.header-tools .lang-switch button.is-active {
  background: var(--png-red);
  color: #fff;
}
.header-tools .lang-switch button:hover:not(.is-active) {
  color: var(--png-red);
  background: var(--png-red-soft);
}

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255,255,255,.96);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--line);
}
.site-header.scrolled { box-shadow: var(--shadow-md); }
.header-inner {
  min-height: var(--header-h);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}
.brand {
  display: flex;
  align-items: center;
  gap: .75rem;
  min-width: 0;
}
.brand-logo {
  height: 42px;
  width: auto;
  object-fit: contain;
}
.brand-fallback {
  height: 42px;
  padding: 0 .7rem;
  display: grid;
  place-items: center;
  background: var(--png-red);
  color: #fff;
  font-weight: 800;
  font-size: 1.15rem;
  letter-spacing: .04em;
  border-radius: 4px;
}
.brand-text strong {
  display: block;
  font-size: 1rem;
  font-weight: 700;
  color: var(--ink);
  line-height: 1.2;
}
.brand-text span {
  display: block;
  font-size: .72rem;
  color: var(--muted);
  margin-top: .12rem;
}

.nav-desktop { display: flex; align-items: center; gap: .1rem; }
.nav-desktop > a,
.nav-item > button {
  display: inline-flex;
  align-items: center;
  gap: .25rem;
  padding: .55rem .8rem;
  font-size: .93rem;
  font-weight: 500;
  color: var(--ink-2);
  border-radius: 8px;
  transition: .2s var(--ease);
}
.nav-desktop > a:hover,
.nav-item > button:hover,
.nav-desktop > a.active,
.nav-item > button.active {
  color: var(--png-red);
  background: var(--png-red-soft);
}
.nav-item { position: relative; }
.nav-item > button::after {
  content: "";
  width: 0; height: 0;
  border-left: 4px solid transparent;
  border-right: 4px solid transparent;
  border-top: 5px solid currentColor;
  opacity: .5;
  margin-left: .15rem;
}
.dropdown {
  position: absolute;
  top: calc(100% + .3rem);
  left: 0;
  min-width: 240px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow-lg);
  padding: .45rem;
  opacity: 0;
  visibility: hidden;
  transform: translateY(6px);
  transition: .2s var(--ease);
}
.nav-item:hover .dropdown,
.nav-item:focus-within .dropdown {
  opacity: 1; visibility: visible; transform: none;
}
.dropdown a {
  display: block;
  padding: .65rem .8rem;
  border-radius: 8px;
  font-size: .9rem;
}
.dropdown a:hover { background: var(--png-red-soft); color: var(--png-red); }

.header-cta {
  display: inline-flex;
  align-items: center;
  padding: .65rem 1.15rem;
  background: var(--png-red);
  color: #fff !important;
  border-radius: 999px;
  font-size: .875rem;
  font-weight: 600;
  box-shadow: 0 8px 20px rgba(212,0,15,.25);
  transition: .25s var(--ease);
  white-space: nowrap;
}
.header-cta:hover { background: var(--png-red-dark); transform: translateY(-1px); }

.nav-toggle {
  display: none;
  width: 42px; height: 42px;
  border-radius: 10px;
  border: 1px solid var(--line);
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 5px;
}
.nav-toggle span {
  display: block; width: 18px; height: 2px;
  background: var(--ink); border-radius: 2px;
}

.mobile-nav {
  display: none;
  border-top: 1px solid var(--line);
  background: #fff;
  max-height: 0;
  overflow: hidden;
  transition: max-height .35s var(--ease);
}
.mobile-nav.open { max-height: 80vh; overflow-y: auto; }
.mobile-nav a,
.mobile-nav .mobile-label {
  display: block;
  padding: .9rem 1rem;
  border-bottom: 1px solid var(--line);
  font-weight: 500;
}
.mobile-nav .mobile-label {
  color: var(--muted);
  font-size: .75rem;
  font-weight: 700;
  letter-spacing: .06em;
  background: var(--bg-soft);
}

/* Hero */
.hero {
  position: relative;
  min-height: clamp(460px, 70vh, 640px);
  background: #111;
  color: #fff;
  overflow: hidden;
}
.hero-slides { position: absolute; inset: 0; }
.hero-slide {
  position: absolute; inset: 0;
  opacity: 0;
  transition: opacity 1s var(--ease);
  background-size: cover;
  background-position: center;
}
.hero-slide.active { opacity: 1; }
.hero-slide::after {
  content: "";
  position: absolute; inset: 0;
  background:
    linear-gradient(105deg, rgba(10,10,10,.92) 0%, rgba(10,10,10,.72) 42%, rgba(10,10,10,.28) 100%),
    linear-gradient(to top, rgba(10,10,10,.55), transparent 45%);
}
.hero-content {
  position: relative; z-index: 2;
  min-height: clamp(460px, 70vh, 640px);
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 3.5rem 0 4.5rem;
}
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: .5rem;
  width: fit-content;
  padding: .4rem .85rem;
  border-radius: 999px;
  border: 1px solid rgba(255,255,255,.18);
  background: rgba(255,255,255,.06);
  font-size: .8125rem;
  color: #e5e5e5;
  margin-bottom: 1.1rem;
}
.hero-badge i {
  width: 6px; height: 6px; border-radius: 50%;
  background: var(--png-red);
  box-shadow: 0 0 0 4px rgba(212,0,15,.28);
}
.hero h1 {
  font-size: clamp(2rem, 4.5vw, 3.25rem);
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -.02em;
  max-width: 14ch;
  margin-bottom: .9rem;
}
.hero h1 em {
  font-style: normal;
  color: #ffb3b8;
}
.hero-lead {
  max-width: 40rem;
  color: #d4d4d4;
  font-size: 1.05rem;
  margin-bottom: 1.75rem;
}
.hero-actions {
  display: flex; flex-wrap: wrap; gap: .8rem;
  margin-bottom: 2.4rem;
}
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: .4rem;
  padding: .85rem 1.35rem;
  border-radius: 999px;
  font-weight: 600;
  font-size: .9375rem;
  transition: .25s var(--ease);
  border: 1px solid transparent;
}
.btn-primary {
  background: var(--png-red);
  color: #fff;
  box-shadow: 0 10px 24px rgba(212,0,15,.3);
}
.btn-primary:hover { background: var(--png-red-dark); transform: translateY(-2px); }
.btn-ghost {
  color: #fff;
  border-color: rgba(255,255,255,.3);
  background: rgba(255,255,255,.06);
}
.btn-ghost:hover { background: rgba(255,255,255,.14); }
.btn-outline {
  color: var(--ink);
  border-color: var(--line);
  background: #fff;
}
.btn-outline:hover { border-color: var(--png-red); color: var(--png-red); }
.btn-dark { background: var(--bg-dark); color: #fff; }
.btn-dark:hover { background: #000; }

.hero-stats {
  display: grid;
  grid-template-columns: repeat(4, minmax(0,1fr));
  gap: .85rem;
  max-width: 760px;
}
.hero-stat {
  padding: .95rem .75rem;
  border-radius: 8px;
  background: rgba(255,255,255,.05);
  border: 1px solid rgba(255,255,255,.1);
}
.hero-stat strong {
  display: block;
  font-size: 1.4rem;
  font-weight: 800;
  line-height: 1.1;
}
.hero-stat span {
  display: block;
  margin-top: .28rem;
  font-size: .76rem;
  color: #a3a3a3;
}
.hero-dots {
  position: absolute;
  z-index: 3;
  left: 50%;
  bottom: 1.35rem;
  transform: translateX(-50%);
  display: flex;
  gap: .45rem;
}
.hero-dots button {
  width: 28px; height: 4px;
  border-radius: 999px;
  background: rgba(255,255,255,.28);
}
.hero-dots button.active {
  background: #fff;
  width: 40px;
}

/* Sections */
.section { padding: 4.75rem 0; }
.section-muted { background: var(--bg-soft); }
.section-dark { background: var(--bg-dark); color: #fff; }
.section-head {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 1.25rem;
  flex-wrap: wrap;
  margin-bottom: 2.25rem;
}
.eyebrow {
  display: inline-block;
  font-size: .78rem;
  font-weight: 700;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--png-red);
  margin-bottom: .45rem;
}
.section-dark .eyebrow { color: #ff8a93; }
.section-head h2,
.page-hero h1 {
  font-size: clamp(1.55rem, 2.8vw, 2.15rem);
  font-weight: 800;
  letter-spacing: -.02em;
  line-height: 1.2;
  color: var(--ink);
}
.section-dark .section-head h2 { color: #fff; }
.section-head p, .lead { color: var(--muted); max-width: 36rem; }
.section-dark .section-head p { color: #a3a3a3; }
.link-more {
  display: inline-flex;
  align-items: center;
  gap: .3rem;
  font-weight: 600;
  color: var(--png-red);
  font-size: .9375rem;
}
.link-more:hover { gap: .5rem; }

/* Category cards */
.cat-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0,1fr));
  gap: 1.1rem;
}
.cat-card {
  position: relative;
  border-radius: var(--radius);
  overflow: hidden;
  aspect-ratio: 16 / 10;
  min-height: 0;
  background: #111;
  color: #fff;
  border: 1px solid #222;
  transition: .3s var(--ease);
}
.cat-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
.cat-card img {
  position: absolute; inset: 0;
  width: 100%; height: 100%;
  object-fit: cover;
  opacity: .55;
  transition: .4s var(--ease);
}
.cat-card:hover img { transform: scale(1.05); opacity: .68; }
.cat-card .body {
  position: relative; z-index: 1;
  min-height: 100%;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: 1.25rem;
  background: linear-gradient(to top, rgba(0,0,0,.88), transparent 55%);
}
.cat-card .tag {
  width: fit-content;
  font-size: .7rem;
  font-weight: 700;
  padding: .2rem .55rem;
  border-radius: 999px;
  background: var(--png-red);
  margin-bottom: .55rem;
}
.cat-card h3 { font-size: 1.08rem; font-weight: 700; margin-bottom: .25rem; }
.cat-card p { font-size: .85rem; color: #d4d4d4; }

/* Values */
.value-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0,1fr));
  gap: 1.1rem;
}
.value-card {
  padding: 1.5rem 1.25rem;
  border-radius: var(--radius);
  background: rgba(255,255,255,.04);
  border: 1px solid rgba(255,255,255,.1);
}
.value-card h3 {
  font-size: 1.05rem;
  margin-bottom: .45rem;
  color: #fff;
}
.value-card .en {
  color: var(--png-red);
  font-size: .78rem;
  font-weight: 700;
  letter-spacing: .08em;
  margin-bottom: .55rem;
}
.value-card p { color: #a3a3a3; font-size: .9rem; }

/* Product */
.filter-bar {
  display: flex; flex-wrap: wrap; gap: .5rem;
  margin-bottom: 1.5rem;
}
.filter-bar button {
  padding: .55rem 1rem;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: #fff;
  color: var(--ink-2);
  font-size: .875rem;
  font-weight: 500;
  transition: .2s var(--ease);
}
.filter-bar button:hover,
.filter-bar button.active {
  background: var(--png-red);
  color: #fff;
  border-color: var(--png-red);
}
.product-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0,1fr));
  gap: 1.1rem;
}
.product-card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  transition: .3s var(--ease);
  display: flex;
  flex-direction: column;
}
.product-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: rgba(212,0,15,.25);
}
.product-card-media {
  aspect-ratio: 4/3;
  background: linear-gradient(180deg, #fafafa, #f0f0f0);
  display: grid;
  place-items: center;
  padding: .75rem;
  position: relative;
  overflow: hidden;
}
.product-card-media img {
  max-height: 100%;
  width: 100%;
  height: 100%;
  object-fit: contain;
  background: #fff;
  transition: .35s var(--ease);
}
.product-card:hover .product-card-media img { transform: scale(1.04); }
.product-badge {
  position: absolute;
  top: .65rem; left: .65rem;
  font-size: .7rem;
  font-weight: 700;
  padding: .22rem .5rem;
  border-radius: 999px;
  background: var(--png-red);
  color: #fff;
  z-index: 1;
}
.product-card-body {
  padding: 1rem 1.05rem 1.15rem;
  display: flex;
  flex-direction: column;
  gap: .3rem;
  flex: 1;
}
.product-card-body .cat {
  font-size: .75rem;
  color: var(--muted);
  font-weight: 600;
}
.product-card-body h3 {
  font-size: .98rem;
  font-weight: 700;
  line-height: 1.35;
}
.product-card-body p {
  font-size: .82rem;
  color: var(--muted);
  flex: 1;
}
.product-card-body .code {
  font-size: .78rem;
  color: var(--png-red);
  font-weight: 700;
}
.product-card-body .spec {
  margin-top: .35rem;
  font-size: .75rem;
  color: #6b7280;
  line-height: 1.45;
  border-top: 1px dashed var(--line);
  padding-top: .45rem;
}

/* About */
.about-split {
  display: grid;
  grid-template-columns: 1.05fr .95fr;
  gap: 2.25rem;
  align-items: center;
}
.about-split .copy h2 {
  font-size: clamp(1.45rem, 2.4vw, 1.9rem);
  font-weight: 800;
  margin-bottom: .9rem;
}
.about-split .copy p {
  color: var(--muted);
  margin-bottom: .9rem;
}
.stat-row {
  display: grid;
  grid-template-columns: repeat(4, minmax(0,1fr));
  gap: .75rem;
  margin-top: 1.25rem;
}
.stat-box {
  padding: .95rem .7rem;
  border-radius: 8px;
  background: var(--bg-soft);
  border: 1px solid var(--line);
  text-align: center;
}
.stat-box strong {
  display: block;
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--png-red);
}
.stat-box span { font-size: .75rem; color: var(--muted); }
.gallery-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: .7rem;
}
.gallery-grid img {
  width: 100%;
  aspect-ratio: 4/3;
  object-fit: cover;
  border-radius: 8px;
  border: 1px solid var(--line);
  background: #f3f3f3;
}

/* News / apps reuse */
.news-grid, .app-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0,1fr));
  gap: 1.1rem;
}
.news-card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  transition: .3s var(--ease);
}
.news-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-md); }
.news-card-media { aspect-ratio: 16/10; overflow: hidden; background: #eee; }
.news-card-media img { width: 100%; height: 100%; object-fit: cover; }
.news-card-body { padding: 1.15rem; }
.news-meta {
  font-size: .78rem;
  color: var(--muted);
  margin-bottom: .45rem;
}
.news-meta .source { color: var(--png-red); font-weight: 700; margin-right: .5rem; }
.news-card h3 {
  font-size: 1.02rem;
  font-weight: 700;
  margin-bottom: .4rem;
  line-height: 1.4;
}
.news-card p { font-size: .88rem; color: var(--muted); }

/* CTA */
.cta-band {
  background:
    radial-gradient(circle at 15% 30%, rgba(212,0,15,.2), transparent 40%),
    linear-gradient(135deg, #1a1a1a, #0d0d0d);
  color: #fff;
  border-radius: 14px;
  padding: 2.5rem 2rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.25rem;
  flex-wrap: wrap;
  border: 1px solid #2a2a2a;
}
.cta-band h2 {
  font-size: clamp(1.35rem, 2.3vw, 1.75rem);
  font-weight: 800;
  margin-bottom: .4rem;
}
.cta-band p { color: #a3a3a3; max-width: 36rem; }

/* Page hero */
.page-hero {
  background:
    linear-gradient(110deg, rgba(10,10,10,.9), rgba(30,10,12,.78)),
    url("../assets/cover-full.jpg") center/cover;
  color: #fff;
  padding: 4.25rem 0 3.25rem;
}
.page-hero .breadcrumb {
  display: flex; flex-wrap: wrap; gap: .4rem;
  font-size: .85rem; color: #c4c4c4; margin-bottom: .9rem;
}
.page-hero .breadcrumb a:hover { color: #fff; }
.page-hero h1 { color: #fff; margin-bottom: .55rem; }
.page-hero p { color: #d4d4d4; max-width: 40rem; }

/* Contact */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.1fr;
  gap: 1.35rem;
}
.contact-card, .form-card {
  padding: 1.45rem 1.35rem;
  border-radius: var(--radius);
  border: 1px solid var(--line);
  background: #fff;
  box-shadow: var(--shadow-sm);
}
.contact-card h3, .form-card h3 {
  font-size: 1.15rem;
  font-weight: 800;
  margin-bottom: .35rem;
}
.contact-card .sub {
  color: var(--png-red);
  font-size: .82rem;
  font-weight: 600;
  margin-bottom: .95rem;
}
.contact-list { display: grid; gap: .65rem; }
.contact-list li {
  display: grid;
  grid-template-columns: 64px 1fr;
  gap: .4rem;
  font-size: .92rem;
}
.contact-list .k { color: var(--muted); font-weight: 600; }
.contact-list a:hover { color: var(--png-red); }
.form-card .hint { font-size: .85rem; color: var(--muted); margin-bottom: 1.1rem; }
.form-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: .85rem;
}
.form-field { display: grid; gap: .3rem; }
.form-field.full { grid-column: 1 / -1; }
.form-field label { font-size: .85rem; font-weight: 600; }
.form-field input,
.form-field select,
.form-field textarea {
  width: 100%;
  padding: .75rem .9rem;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--bg-soft);
}
.form-field input:focus,
.form-field select:focus,
.form-field textarea:focus {
  outline: none;
  border-color: rgba(212,0,15,.45);
  background: #fff;
  box-shadow: 0 0 0 3px rgba(212,0,15,.1);
}
.form-field textarea { min-height: 130px; resize: vertical; }
.form-status { margin-top: .85rem; font-size: .9rem; color: #047857; display: none; }
.form-status.show { display: block; }

/* Download */
.download-list { display: grid; gap: .7rem; }
.download-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1.1rem 1.15rem;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
}
.download-item:hover { border-color: rgba(212,0,15,.3); box-shadow: var(--shadow-sm); }
.download-item h3 { font-size: 1rem; font-weight: 700; }
.download-item p { font-size: .85rem; color: var(--muted); margin-top: .2rem; }

/* Catalog viewer */
.catalog-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0,1fr));
  gap: 1rem;
}
.catalog-page {
  border: 1px solid var(--line);
  border-radius: 8px;
  overflow: hidden;
  background: #fff;
  transition: .25s var(--ease);
}
.catalog-page:hover { box-shadow: var(--shadow-md); transform: translateY(-2px); }
.catalog-page img { width: 100%; aspect-ratio: 1242/816; object-fit: cover; }
.catalog-page figcaption {
  padding: .65rem .8rem;
  font-size: .82rem;
  color: var(--muted);
  border-top: 1px solid var(--line);
}

/* Footer */
.site-footer {
  background: var(--bg-dark);
  color: #cfcfcf;
  padding-top: 3.25rem;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr;
  gap: 1.75rem;
  padding-bottom: 2.25rem;
  border-bottom: 1px solid #2a2a2a;
}
.footer-brand p {
  font-size: .9rem;
  color: #9ca3af;
  max-width: 28rem;
  margin: .85rem 0;
}
.footer-brand h3,
.footer-col h4 {
  color: #fff;
  font-weight: 700;
  margin-bottom: .85rem;
  font-size: .95rem;
}
.footer-col a {
  display: block;
  font-size: .9rem;
  color: #9ca3af;
  padding: .28rem 0;
}
.footer-col a:hover { color: #fff; }
.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
  padding: 1.1rem 0 1.35rem;
  font-size: .8rem;
  color: #9ca3af;
}
.demo-note { font-size: .75rem; color: #9ca3af; opacity: .9; }
.chip {
  font-size: .78rem;
  padding: .3rem .65rem;
  border-radius: 999px;
  background: var(--bg-soft);
  border: 1px solid var(--line);
  color: var(--ink-2);
}

/* Responsive */
@media (max-width: 1024px) {
  .product-grid { grid-template-columns: repeat(3, minmax(0,1fr)); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .about-split { grid-template-columns: 1fr; }
  .stat-row { grid-template-columns: repeat(2, minmax(0,1fr)); }
  .cat-grid, .value-grid { grid-template-columns: repeat(2, minmax(0,1fr)); }
}
@media (max-width: 860px) {
  .nav-desktop, .header-cta { display: none; }
  .nav-toggle { display: inline-flex; }
  .topbar .lang-switch { display: none; }
}
@media (min-width: 861px) {
  .header-tools .lang-switch { display: none; }
}
  .mobile-nav { display: block; }
  .news-grid, .app-grid, .contact-grid, .catalog-grid { grid-template-columns: 1fr; }
  .product-grid { grid-template-columns: repeat(2, minmax(0,1fr)); }
  .hero-stats { grid-template-columns: repeat(2, minmax(0,1fr)); }
  .form-grid { grid-template-columns: 1fr; }
  .cat-grid, .value-grid { grid-template-columns: 1fr; }
}
@media (max-width: 520px) {
  .product-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .hero h1 { max-width: none; }
  .download-item { flex-direction: column; align-items: flex-start; }
}