/* ============================================================
   L1 — 产品总览页样式
============================================================ */

/* ── L1 Banner ───────────────────────────────────────────── */
.l1-banner {
  position: relative;
  height: 460px;
  overflow: hidden;
  background: #0a0a0a;
  display: flex;
  align-items: center;
  justify-content: center;
}
.l1-banner-bg {
  position: absolute;
  inset: 0;
}
.l1-banner-bg img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: .35;
}
.l1-banner-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(105deg, rgba(10,10,10,.85) 0%, rgba(10,10,10,.4) 60%, rgba(10,10,10,.15) 100%);
}
.l1-banner-content {
  position: relative;
  z-index: 1;
  text-align: center;
  width: 100%;
}
.banner-kicker {
  font-family: var(--font-en);
  font-size: .6875rem;
  font-weight: 600;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--brand);
  margin-bottom: .875rem;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: .625rem;
}
.banner-kicker::before {
  content: '';
  display: inline-block;
  width: 1.75rem;
  height: 2px;
  background: var(--brand);
  border-radius: 1px;
}
.banner-kicker::after {
  content: '';
  display: inline-block;
  width: 1.75rem;
  height: 2px;
  background: var(--brand);
  border-radius: 1px;
}
.banner-title {
  font-size: clamp(2.5rem, 5.5vw, 4rem);
  font-weight: 600;
  color: var(--white);
  letter-spacing: -.03em;
  line-height: 1.1;
  margin-bottom: .875rem;
}
.banner-desc {
  font-size: 1rem;
  color: rgba(255,255,255,.6);
  max-width: 420px;
  line-height: 1.7;
  margin: 0 auto;
}

/* ── Category Sections ───────────────────────────────────── */
.cat-section {
  margin-bottom: 4rem;
}
.cat-header {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 1.25rem;
}
.cat-icon-pill {
  display: flex;
  align-items: center;
  gap: .5rem;
  padding: .375rem .875rem .375rem .625rem;
  border-radius: 99px;
  font-size: .875rem;
  font-weight: 500;
  flex-shrink: 0;
  border: 1px solid;
}
.cat-icon-pill i { font-size: 1rem; }
.cat-title-group { flex: 1; }
.cat-name {
  font-size: 1.1875rem;
  font-weight: 600;
  color: var(--dark);
  letter-spacing: -.015em;
  line-height: 1.2;
}
.cat-rule {
  flex: 1;
  height: 1px;
  background: var(--border);
}

/* ── Sub-category Card Grid ──────────────────────────────── */
.sub-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.5rem;
}
@media (max-width: 1200px) {
  .sub-grid { grid-template-columns: repeat(3, 1fr); }
}
@media (max-width: 768px) {
  .sub-grid { grid-template-columns: repeat(2, 1fr); gap: 1rem; }
}
@media (max-width: 480px) {
  .sub-grid { grid-template-columns: 1fr; }
}

/* ── Responsive ──────────────────────────────────────────── */
@media (max-width: 768px) {
  .l1-banner { height: 360px; }
}
@media (max-width: 480px) {
  .l1-banner { height: 300px; }
}