.sub-hero {
  width: min(1440px, calc(100% - 72px));
  margin: 0 auto;
  min-height: 390px;
  display: grid;
  grid-template-columns: minmax(420px, 1fr) minmax(420px, .9fr);
  align-items: center;
  gap: 36px;
  padding: 58px 0 34px;
}
.sub-hero h1 {
  margin: 0 0 18px;
  font-size: clamp(34px, 4vw, 58px);
  line-height: 1.08;
}
.sub-hero p {
  margin: 0 0 26px;
  color: rgba(255,255,255,.88);
  font-size: 17px;
  line-height: 1.8;
}
.sub-hero .eyebrow {
  margin-bottom: 10px;
  color: var(--cyan);
  font-size: 13px;
  font-weight: 900;
  text-transform: uppercase;
}
.sub-hero-art {
  min-height: 260px;
  display: grid;
  place-items: center;
}
.sub-visual-glow {
  width: min(640px, 43vw);
  aspect-ratio: 16 / 9;
  display: grid;
  place-items: center;
  background: transparent;
  box-shadow: none;
}
.sub-hero-art img {
  width: min(620px, 43vw);
  filter: drop-shadow(0 28px 66px rgba(22,120,255,.28));
}
.sub-section {
  width: min(1440px, calc(100% - 72px));
  margin: 0 auto;
  padding: 34px 0;
}
.sub-title {
  margin: 0 0 12px;
  text-align: center;
  font-size: clamp(24px, 2.25vw, 34px);
  font-weight: 900;
}
.sub-desc {
  max-width: 940px;
  margin: 0 auto 24px;
  text-align: center;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.8;
}
.sub-grid,
.product-grid,
.faq-list {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}
.product-grid {
  width: fit-content;
  max-width: 100%;
  margin: 0 auto;
  grid-template-columns: repeat(var(--product-cols, 4), minmax(260px, 320px));
  justify-content: center;
}
.product-grid[data-cols="1"] { grid-template-columns: minmax(260px, 320px); }
.product-grid[data-cols="2"] { grid-template-columns: repeat(2, minmax(260px, 320px)); }
.product-grid[data-cols="3"] { grid-template-columns: repeat(3, minmax(260px, 320px)); }
.product-grid[data-cols="4"] { grid-template-columns: repeat(4, minmax(260px, 320px)); }
.region-tabs {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 10px;
  margin: 0 auto 18px;
}
.region-tabs button {
  min-width: 106px;
  padding: 10px 16px;
  border: 1px solid rgba(83,153,255,.36);
  border-radius: 999px;
  background: rgba(5,22,51,.78);
  color: #eaf4ff;
  font-weight: 900;
  cursor: pointer;
  transition: transform .2s ease, background .2s ease, border-color .2s ease, box-shadow .2s ease;
}
.region-tabs button small {
  display: block;
  margin-top: 2px;
  color: var(--muted);
  font-size: 11px;
}
.region-tabs button:hover,
.region-tabs button.active {
  transform: translateY(-2px);
  border-color: rgba(36,220,255,.78);
  background: linear-gradient(180deg, rgba(22,120,255,.9), rgba(5,36,88,.88));
  box-shadow: 0 12px 28px rgba(22,120,255,.22);
}
.sub-grid.three { grid-template-columns: repeat(3, 1fr); }
.compact-grid {
  max-width: 1120px;
  margin: 0 auto;
}
.compact-grid .sub-card {
  min-height: 150px;
  padding: 18px 20px;
}
.compact-grid .sub-card b {
  margin-bottom: 8px;
}
.compact-grid .sub-card h3 {
  margin-bottom: 8px;
  font-size: 18px;
}
.compact-grid .sub-card p {
  max-width: 300px;
  margin: 0 auto;
  font-size: 13px;
  line-height: 1.7;
}
.faq-list { grid-template-columns: repeat(2, 1fr); }
.sub-card,
.product-card,
.faq-list details,
.contact-card {
  position: relative;
  overflow: hidden;
  min-height: 210px;
  padding: 24px 20px;
  border: 1px solid rgba(83,153,255,.38);
  border-radius: 10px;
  background: linear-gradient(180deg, rgba(11,43,86,.58), rgba(5,22,51,.76));
  text-align: center;
  box-shadow: inset 0 0 34px rgba(31,128,255,.08);
  transition: transform .22s ease, border-color .22s ease, background .22s ease, box-shadow .22s ease;
}
.faq-list details {
  min-height: 0;
  padding: 16px 18px;
}
.sub-card:hover,
.product-card:hover,
.faq-list details:hover,
.contact-card:hover {
  transform: translateY(-5px);
  border-color: rgba(36,220,255,.7);
  box-shadow: 0 18px 46px rgba(22,120,255,.16), inset 0 0 36px rgba(36,220,255,.08);
}
.sub-card img {
  width: 64px;
  height: 64px;
  object-fit: contain;
  margin: 0 auto 16px;
}
.sub-card b,
.product-card .tag {
  display: inline-flex;
  margin-bottom: 12px;
  color: var(--cyan);
  font-weight: 900;
}
.sub-card h3,
.product-card h3,
.contact-card h3 {
  margin: 0 0 10px;
  font-size: 19px;
}
.sub-card p,
.product-card p,
.faq-list p,
.contact-card p {
  margin: 0;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.75;
}
.product-card {
  min-height: 316px;
  padding: 22px 16px;
  width: 100%;
}
.product-card .price {
  margin: 12px 0;
  color: #2f95ff;
  font-size: 30px;
  font-weight: 900;
}
.spec-list {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 7px;
  margin: 14px 0 18px;
}
.spec-list span {
  padding: 8px;
  border: 1px solid rgba(83,153,255,.24);
  background: rgba(2,12,30,.34);
  color: #dbeaff;
  font-size: 13px;
}
.buy-btn,
.sub-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 40px;
  padding: 0 18px;
  border-radius: 6px;
  background: linear-gradient(180deg, #208bff, #0868ff);
  color: #fff;
  font-size: 15px;
  font-weight: 900;
}
.faq-list summary {
  cursor: pointer;
  list-style: none;
  color: #e9f2ff;
  font-size: 15px;
  font-weight: 900;
}
.faq-list summary::after {
  content: "+";
  float: right;
  color: var(--cyan);
}
.faq-list details[open] summary::after { content: "-"; }
.faq-list p { margin-top: 8px; font-size: 13px; line-height: 1.65; }
.contact-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}
.wide-cta {
  width: min(1440px, calc(100% - 72px));
  margin: 28px auto 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 22px;
  padding: 30px;
  border: 1px solid rgba(83,153,255,.42);
  border-radius: 10px;
  background: linear-gradient(90deg, rgba(10,42,92,.9), rgba(4,18,42,.9));
  text-align: center;
}
.wide-cta h2 { margin: 0 0 8px; font-size: 26px; }
.wide-cta p { margin: 0; color: var(--muted); font-size: 14px; }
.site-footer {
  grid-template-columns: minmax(220px, 1.45fr) repeat(4, minmax(150px, 1fr));
  align-items: start;
}
.site-footer h3,
.site-footer a,
.site-footer p {
  text-align: center;
}
.footer-brand .brand {
  justify-content: center;
}
@media (max-width: 1200px) {
  .sub-hero { grid-template-columns: 1fr; }
  .sub-hero-art img { width: min(620px, 92vw); }
  .sub-visual-glow { width: min(660px, 92vw); }
  .sub-grid, .contact-grid { grid-template-columns: repeat(2, 1fr); }
  .product-grid[data-cols="3"],
  .product-grid[data-cols="4"] { grid-template-columns: repeat(2, minmax(260px, 320px)); }
}
@media (max-width: 700px) {
  .sub-hero,
  .sub-section,
  .wide-cta { width: auto; margin-left: 16px; margin-right: 16px; }
  .sub-hero h1 { font-size: 32px; }
  .sub-hero p { font-size: 15px; }
  .sub-grid,
  .sub-grid.three,
  .faq-list,
  .contact-grid { grid-template-columns: 1fr; }
  .product-grid {
    width: 100%;
    grid-template-columns: 1fr;
  }
  .wide-cta { display: block; }
  .wide-cta .btn { width: 100%; margin-top: 18px; }
}