/* ============================================
   NexaCore Technologies — Global Stylesheet
   Modern, minimal, tech-forward design system
   ============================================ */

:root {
  --bg: #ffffff;
  --bg-alt: #f5f7fb;
  --surface: #ffffff;
  --border: rgba(16, 24, 40, 0.12);
  --text: #16202e;
  --text-muted: #5b6779;
  --accent: #4f7cff;
  --accent-2: #7c5cff;
  --success: #10b981;
  --radius: 14px;
  --max-w: 1160px;
  --font: "Inter", "Segoe UI", -apple-system, BlinkMacSystemFont, "Helvetica Neue", Arial, sans-serif;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

.container { max-width: var(--max-w); margin: 0 auto; padding: 0 24px; }

a { color: inherit; text-decoration: none; transition: color 0.2s ease; }
ul { list-style: none; }

h1, h2, h3 { line-height: 1.2; font-weight: 700; letter-spacing: -0.02em; }
h1 { font-size: clamp(2.2rem, 5vw, 3.4rem); }
h2 { font-size: clamp(1.6rem, 3.5vw, 2.3rem); }
h3 { font-size: 1.15rem; }

/* ---------- Eyebrow & gradient text ---------- */
.eyebrow {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--accent);
  margin-bottom: 14px;
}
.gradient-text {
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

/* ---------- Header ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.88);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
}
.logo { display: flex; align-items: center; gap: 10px; font-weight: 700; font-size: 1.2rem; }
.logo-img { height: 40px; width: auto; display: block; }

.main-nav { display: flex; align-items: center; gap: 30px; }
.main-nav a { font-size: 0.95rem; color: var(--text-muted); font-weight: 500; }
.main-nav a:hover, .main-nav a.active { color: var(--text); }
.main-nav a.active { position: relative; }
.main-nav a.active::after {
  content: "";
  position: absolute;
  left: 0; right: 0; bottom: -22px;
  height: 2px;
  background: var(--accent);
}
.nav-cta {
  padding: 9px 20px !important;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--accent), var(--accent-2)) !important;
  color: #fff !important;
  font-weight: 600 !important;
}
.nav-cta::after { display: none !important; }

.nav-toggle { display: none; background: none; border: none; cursor: pointer; padding: 8px; }
.nav-toggle span {
  display: block;
  width: 22px; height: 2px;
  background: var(--text);
  margin: 5px 0;
  border-radius: 2px;
  transition: 0.25s;
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-block;
  padding: 13px 28px;
  border-radius: 11px;
  font-weight: 600;
  font-size: 0.95rem;
  cursor: pointer;
  border: none;
  transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
}
.btn:hover { transform: translateY(-2px); }
.btn-primary {
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: #fff;
  box-shadow: 0 8px 24px rgba(79, 124, 255, 0.35);
}
.btn-ghost { border: 1px solid var(--border); color: var(--text); background: rgba(22, 32, 46, 0.03); }
.btn-ghost:hover { background: rgba(22, 32, 46, 0.07); }
.btn-light { background: #16202e; color: #ffffff; }
.mt { margin-top: 28px; }
.btn-block { width: 100%; text-align: center; }

.text-link { color: var(--accent); font-weight: 600; font-size: 0.92rem; }
.text-link:hover { color: var(--accent-2); }

/* ---------- Hero ---------- */
.hero { padding: 90px 0 70px; overflow: hidden; }
.hero-inner {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 60px;
  align-items: center;
}
.lead, .lead-sm { color: var(--text-muted); font-size: 1.1rem; margin: 20px 0 30px; max-width: 56ch; }
.lead-sm { font-size: 1.02rem; }

.hero-actions { display: flex; gap: 16px; flex-wrap: wrap; }

.hero-stats {
  display: grid;
  grid-template-columns: repeat(4, auto);
  gap: 36px;
  margin-top: 56px;
  padding-top: 32px;
  border-top: 1px solid var(--border);
}
.stat strong { display: block; font-size: 1.7rem; font-weight: 800; }
.stat span { font-size: 0.82rem; color: var(--text-muted); }

/* Hero visual */
.hero-visual { display: grid; place-items: center; }
.visual-card {
  position: relative;
  width: 340px; height: 340px;
  border-radius: 24px;
  background: var(--surface);
  border: 1px solid var(--border);
  overflow: hidden;
  box-shadow: 0 30px 80px rgba(22, 32, 46, 0.18);
}
.visual-grid {
  position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.05) 1px, transparent 1px);
  background-size: 34px 34px;
}
.visual-ring {
  position: absolute;
  top: 50%; left: 50%;
  width: 180px; height: 180px;
  transform: translate(-50%, -50%);
  border: 2px dashed rgba(124, 92, 255, 0.5);
  border-radius: 50%;
  animation: spin 22s linear infinite;
}
/* Hero visual — real photo card */
.visual-photo-card { width: 360px; height: 400px; padding: 0; }
.visual-photo {
  position: absolute; inset: 0;
  width: 100%; height: 100%;
  object-fit: cover;
  border-radius: inherit;
}
.visual-overlay {
  position: absolute; inset: 0;
  background: linear-gradient(180deg, rgba(11,15,26,0.05) 40%, rgba(11,15,26,0.75));
  border-radius: inherit;
}
.visual-corner-logo {
  position: absolute;
  bottom: 60px; left: 22px;
  width: 110px; height: auto;
  filter: drop-shadow(0 4px 14px rgba(0,0,0,0.5));
}
.visual-badge {
  position: absolute;
  bottom: 18px; left: 22px;
  padding: 8px 14px;
  font-size: 0.78rem;
  font-weight: 600;
  border-radius: 999px;
  background: rgba(16, 185, 129, 0.14);
  color: var(--success);
  border: 1px solid rgba(16, 185, 129, 0.3);
}
@keyframes spin { to { transform: translate(-50%, -50%) rotate(360deg); } }

/* ---------- Trusted band ---------- */
.trusted { padding: 34px 0; border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); }
.trusted-label { font-size: 0.82rem; color: var(--text-muted); text-align: center; margin-bottom: 18px; }
.trusted-logos {
  display: flex; justify-content: center; flex-wrap: wrap; gap: 42px;
  font-weight: 700; font-size: 1.05rem; letter-spacing: 0.06em;
  color: rgba(22, 32, 46, 0.4);
}

/* ---------- Sections ---------- */
.section { padding: 88px 0; }
.section.alt { background: var(--bg-alt); }
.section-head { text-align: center; max-width: 640px; margin: 0 auto 56px; }
.section-head p { color: var(--text-muted); margin-top: 14px; }

/* ---------- Cards ---------- */
.cards-grid { display: grid; gap: 24px; }
.cards-grid.three { grid-template-columns: repeat(3, 1fr); }
.cards-grid.two { grid-template-columns: repeat(2, 1fr); }
.cards-grid.four { grid-template-columns: repeat(4, 1fr); }

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px 28px;
  transition: transform 0.25s ease, border-color 0.25s ease;
}
.card:hover { transform: translateY(-4px); border-color: rgba(79, 124, 255, 0.45); }
.card-icon { font-size: 1.8rem; margin-bottom: 16px; }
.card-icon .icon-svg { width: 36px; height: 36px; color: var(--accent); }
.card p { color: var(--text-muted); font-size: 0.95rem; margin-top: 10px; }

.card.horizontal { display: flex; gap: 20px; align-items: flex-start; }
.card.horizontal .card-icon { margin-bottom: 0; }

/* ---------- Check list ---------- */
.check-list { margin: 8px 0 10px; }
.check-list li {
  position: relative;
  padding-left: 30px;
  margin-bottom: 12px;
  color: var(--text-muted);
}
.check-list li::before {
  content: "✓";
  position: absolute; left: 0;
  width: 20px; height: 20px;
  display: grid; place-items: center;
  font-size: 0.72rem;
  font-weight: 800;
  color: var(--success);
  background: rgba(16, 185, 129, 0.12);
  border-radius: 6px;
  top: 3px;
}

/* ---------- Split layout ---------- */
.split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}

/* ---------- Catalog nav ---------- */
.cat-nav {
  position: sticky;
  top: 68px;
  z-index: 50;
  background: rgba(255, 255, 255, 0.94);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}
.cat-nav-inner {
  display: flex;
  gap: 10px;
  overflow-x: auto;
  padding: 12px 24px;
  scrollbar-width: none;
}
.cat-nav-inner::-webkit-scrollbar { display: none; }
.cat-nav-inner a {
  white-space: nowrap;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-muted);
  padding: 8px 16px;
  border-radius: 999px;
  border: 1px solid var(--border);
  transition: all 0.2s ease;
}
.cat-nav-inner a:hover {
  color: var(--text);
  border-color: rgba(79, 124, 255, 0.5);
  background: rgba(79, 124, 255, 0.1);
}

/* ---------- Category head ---------- */
.cat-head {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  gap: 24px;
  margin-bottom: 40px;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--border);
}
.cat-head p { color: var(--text-muted); margin-top: 10px; max-width: 58ch; }
.cat-count {
  font-size: 0.78rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--accent);
  padding: 7px 14px;
  border-radius: 999px;
  background: rgba(79, 124, 255, 0.12);
  white-space: nowrap;
}

/* ---------- Large product cards ---------- */
.prod-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 28px;
}
.p-card-lg {
  display: flex;
  flex-direction: column;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: transform 0.25s ease, border-color 0.25s ease, box-shadow 0.25s ease;
}
.p-card-lg:hover {
  transform: translateY(-4px);
  border-color: rgba(79, 124, 255, 0.45);
  box-shadow: 0 18px 44px rgba(22, 32, 46, 0.14);
}
.p-media {
  position: relative;
  height: 240px;
  background: #f7f9fc;
  padding: 22px;
  border-bottom: 1px solid var(--border);
  overflow: hidden;
}
.p-media img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: contain;
  mix-blend-mode: multiply;
}
/* 无产品图时的型号占位卡 */
.p-media.placeholder {
  background:
    radial-gradient(circle at 30% 25%, rgba(79, 124, 255, 0.14), transparent 60%),
    radial-gradient(circle at 75% 80%, rgba(124, 92, 255, 0.12), transparent 60%),
    linear-gradient(150deg, #eef2fb, #e6ebf7);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 6px;
  border-bottom: 1px solid var(--border);
}
.ph-code {
  font-size: 2.4rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  color: #16202e;
  background: linear-gradient(120deg, #16202e, #4f7cff);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}
.ph-note {
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--text-muted);
}
.p-info { padding: 26px 28px 28px; display: flex; flex-direction: column; flex-grow: 1; }
.p-info h3 { font-size: 1.2rem; margin-bottom: 10px; }
.p-info > p { font-size: 0.93rem; color: var(--text-muted); margin-bottom: 16px; }

.spec-chips { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 18px; }
.spec-chip {
  font-size: 0.76rem;
  font-weight: 600;
  color: var(--text);
  padding: 5px 11px;
  border-radius: 7px;
  background: rgba(79, 124, 255, 0.1);
  border: 1px solid rgba(79, 124, 255, 0.22);
}

.feat-list { margin-bottom: 20px; flex-grow: 1; }
.feat-list li {
  position: relative;
  padding-left: 20px;
  font-size: 0.87rem;
  color: var(--text-muted);
  margin-bottom: 8px;
  line-height: 1.5;
}
.feat-list li::before {
  content: "—";
  position: absolute;
  left: 0;
  color: var(--accent);
}

/* ---------- Spec table ---------- */
.table-wrap {
  margin-top: 40px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px 30px;
  overflow-x: auto;
}
.table-wrap h3 { font-size: 1.05rem; margin-bottom: 18px; }
.spec-table { width: 100%; border-collapse: collapse; font-size: 0.87rem; min-width: 620px; }
.spec-table th {
  text-align: left;
  font-weight: 700;
  font-size: 0.76rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-muted);
  padding: 10px 12px;
  border-bottom: 1px solid var(--border);
  white-space: nowrap;
}
.spec-table td {
  padding: 11px 12px;
  border-bottom: 1px solid rgba(16, 24, 40, 0.06);
  color: var(--text-muted);
}
.spec-table td:first-child { color: var(--text); font-weight: 600; }
.spec-table tr:last-child td { border-bottom: none; }
.spec-table tbody tr:hover td { background: rgba(79, 124, 255, 0.06); }
.table-note { font-size: 0.78rem; color: var(--text-muted); margin-top: 14px; }

/* ---------- Fact grid (about) ---------- */
.fact { text-align: center; padding: 30px 20px; }
.fact strong {
  display: block;
  font-size: 2rem;
  font-weight: 800;
  background: linear-gradient(120deg, #16202e, #4f7cff);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}
.fact span { font-size: 0.82rem; color: var(--text-muted); }

/* ---------- Product showcase (featured products with photos) ---------- */
.product-showcase {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 22px;
}
.p-card {
  display: flex; flex-direction: column;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: transform 0.25s ease, border-color 0.25s ease, box-shadow 0.25s ease;
}
.p-card:hover {
  transform: translateY(-5px);
  border-color: rgba(79, 124, 255, 0.5);
  box-shadow: 0 14px 40px rgba(79, 124, 255, 0.16);
}
.p-img {
  background: #f4f6fa;
  padding: 18px;
  display: grid;
  place-items: center;
}
.p-img img {
  width: 100%;
  height: 210px;
  object-fit: contain;
  mix-blend-mode: multiply;   /* 让白底产品图自然融入浅色容器 */
}
.p-body { padding: 20px 22px 24px; flex-grow: 1; display: flex; flex-direction: column; }
.p-body h3 { font-size: 1.02rem; margin-bottom: 8px; }
.p-body p { font-size: 0.87rem; color: var(--text-muted); margin-bottom: 14px; flex-grow: 1; }

/* ---------- Photo card (factory image in split layout) ---------- */
.photo-card {
  position: relative;
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--border);
  box-shadow: 0 24px 60px rgba(0, 0, 0, 0.35);
}
.photo-card img { display: block; width: 100%; height: 100%; object-fit: cover; }
.photo-overlay {
  position: absolute;
  left: 0; right: 0; bottom: 0;
  padding: 44px 26px 22px;
  background: linear-gradient(180deg, transparent, rgba(11, 15, 26, 0.88));
  display: flex; flex-direction: column; gap: 2px;
}
.photo-overlay strong { font-size: 1rem; }
.photo-overlay span { font-size: 0.84rem; color: var(--text-muted); }

.split .lead-sm { margin: 0 0 16px; }
.split .lead-sm:first-of-type { margin-top: 0; }

/* ---------- Quote card ---------- */
.quote-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 38px 34px;
}
.quote-text { font-size: 1.15rem; line-height: 1.6; font-style: italic; color: var(--text); }
.quote-meta { display: flex; align-items: center; gap: 14px; margin-top: 26px; }
.quote-meta strong { display: block; font-size: 0.95rem; }
.quote-meta span { font-size: 0.82rem; color: var(--text-muted); }
.avatar {
  width: 46px; height: 46px;
  border-radius: 50%;
  display: grid; place-items: center;
  font-weight: 700; font-size: 0.9rem;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: #fff;
  flex-shrink: 0;
}

/* ---------- Page hero (inner pages) ---------- */
.page-hero {
  padding: 90px 0;
  background:
    radial-gradient(ellipse 60% 80% at 70% 20%, rgba(124, 92, 255, 0.08), transparent),
    radial-gradient(ellipse 50% 60% at 20% 80%, rgba(79, 124, 255, 0.07), transparent),
    var(--bg-alt);
  border-bottom: 1px solid var(--border);
}
.page-hero .lead { margin-bottom: 0; }
.page-hero.compact { padding: 64px 0; }

/* ---------- Timeline ---------- */
.timeline-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 34px 32px;
}
.timeline-card h3 { margin-bottom: 22px; }
.tl-item { display: flex; gap: 18px; margin-bottom: 20px; }
.tl-item:last-child { margin-bottom: 0; }
.tl-year {
  font-weight: 800;
  color: var(--accent);
  min-width: 52px;
  font-size: 0.95rem;
}
.tl-item p { color: var(--text-muted); font-size: 0.94rem; }

/* ---------- Team ---------- */
.team-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 30px 24px;
  text-align: center;
}
.avatar-lg {
  width: 64px; height: 64px;
  margin: 0 auto 16px;
  border-radius: 50%;
  display: grid; place-items: center;
  font-weight: 700;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: #fff;
}
.team-card span { display: block; font-size: 0.8rem; color: var(--accent); font-weight: 600; margin: 4px 0 10px; }
.team-card p { font-size: 0.88rem; color: var(--text-muted); }

/* ---------- Product cards ---------- */
.product-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.product-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 34px 30px;
  display: flex; flex-direction: column;
  transition: transform 0.25s ease, border-color 0.25s ease;
}
.product-card:hover { transform: translateY(-4px); border-color: rgba(79, 124, 255, 0.45); }
.product-card.featured {
  border-color: rgba(124, 92, 255, 0.55);
  box-shadow: 0 16px 48px rgba(124, 92, 255, 0.18);
}
.product-tag {
  align-self: flex-start;
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  padding: 5px 12px;
  border-radius: 999px;
  background: rgba(79, 124, 255, 0.14);
  color: var(--accent);
  margin-bottom: 18px;
}
.product-card.featured .product-tag { background: rgba(124, 92, 255, 0.16); color: var(--accent-2); }
.product-card ul { margin: 18px 0 24px; flex-grow: 1; }
.product-card li {
  position: relative;
  padding-left: 22px;
  font-size: 0.9rem;
  color: var(--text-muted);
  margin-bottom: 8px;
}
.product-card li::before { content: "•"; position: absolute; left: 4px; color: var(--accent); font-weight: 700; }

/* ---------- Industries ---------- */
.industries-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(190px, 1fr));
  gap: 16px;
}
.industry-chip {
  display: flex; align-items: center; gap: 10px;
  padding: 18px 22px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  font-weight: 600;
  font-size: 0.95rem;
  transition: border-color 0.2s ease;
}
.industry-chip:hover { border-color: rgba(79, 124, 255, 0.45); }

/* ---------- CTA band ---------- */
.cta-band {
  padding: 76px 0;
  background: linear-gradient(120deg, rgba(79, 124, 255, 0.1), rgba(124, 92, 255, 0.1)), var(--bg-alt);
  border-top: 1px solid var(--border);
}
.cta-inner { text-align: center; max-width: 620px; margin: 0 auto; }
.cta-inner p { color: var(--text-muted); margin: 14px 0 28px; }

/* ---------- Contact ---------- */
.contact-section { padding-top: 56px; }
.contact-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: 40px;
  align-items: start;
}
.contact-form-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 40px;
}
.contact-form-card h2 { margin-bottom: 28px; font-size: 1.5rem; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.form-group { margin-bottom: 20px; }
.form-group label {
  display: block;
  font-size: 0.85rem;
  font-weight: 600;
  margin-bottom: 8px;
  color: var(--text-muted);
}
.form-group input, .form-group select, .form-group textarea {
  width: 100%;
  padding: 13px 16px;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: #ffffff;
  color: var(--text);
  font-family: inherit;
  font-size: 0.95rem;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}
.form-group input:focus, .form-group select:focus, .form-group textarea:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(79, 124, 255, 0.18);
}
.form-group textarea { resize: vertical; }
.form-note { font-size: 0.8rem; color: var(--text-muted); margin-top: 14px; text-align: center; }

.contact-info { display: grid; gap: 18px; }
.info-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 26px 28px;
}
.info-card h3 { font-size: 1rem; margin-bottom: 8px; }
.info-card p { color: var(--text-muted); font-size: 0.92rem; margin-bottom: 4px; }
.info-card a:hover { color: var(--accent); }
.info-card .muted { font-size: 0.8rem; }
.info-card.highlight { border-color: rgba(79, 124, 255, 0.45); background: linear-gradient(140deg, rgba(79, 124, 255, 0.08), var(--surface)); }

/* ---------- Footer ---------- */
.site-footer { border-top: 1px solid var(--border); background: var(--bg-alt); padding: 56px 0 0; }
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 48px;
  padding-bottom: 44px;
}
.footer-logo { font-size: 1.1rem; }
.footer-logo .logo-img { height: 30px; }
.footer-desc { color: var(--text-muted); font-size: 0.9rem; margin-top: 16px; max-width: 34ch; }
.site-footer h4 { font-size: 0.85rem; text-transform: uppercase; letter-spacing: 0.1em; color: var(--text); margin-bottom: 18px; }
.site-footer h4 + a, .site-footer h4 + span { display: block; }
.footer-grid a, .footer-grid span {
  display: block;
  color: var(--text-muted);
  font-size: 0.92rem;
  margin-bottom: 10px;
}
.footer-grid a:hover { color: var(--text); }
.footer-bottom {
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  padding: 22px 24px;
  border-top: 1px solid var(--border);
  font-size: 0.82rem;
  color: var(--text-muted);
}

/* ---------- Responsive ---------- */
/* 首页 Hero 主标语放大 */
.hero-content .eyebrow { font-size: 1.25rem; letter-spacing: 0.1em; }
/* 首页应用领域标题放大 */
.trusted-label { font-size: 1.45rem; font-weight: 600; color: var(--text); margin-bottom: 24px; }

@media (max-width: 960px) {
  .hero-inner, .split, .contact-grid { grid-template-columns: 1fr; }
  .hero-visual { display: block; max-width: 460px; }
  .visual-photo-card { height: 320px; }
  .cards-grid.three, .cards-grid.four, .product-grid { grid-template-columns: repeat(2, 1fr); }
  .product-showcase { grid-template-columns: repeat(2, 1fr); }
  .prod-grid { grid-template-columns: 1fr; }
  .cat-head { flex-direction: column; align-items: flex-start; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 640px) {
  .main-nav {
    position: absolute;
    top: 68px; left: 0; right: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    background: var(--bg);
    border-bottom: 1px solid var(--border);
    display: none;
    padding: 12px 24px 20px;
  }
  .main-nav.open { display: flex; }
  .main-nav a { padding: 12px 0; }
  .main-nav a.active::after { display: none; }
  .nav-cta { text-align: center; margin-top: 8px; }
  .nav-toggle { display: block; }

  .cards-grid.three, .cards-grid.two, .cards-grid.four, .product-grid, .product-showcase { grid-template-columns: 1fr; }
  .form-row { grid-template-columns: 1fr; }
  .hero { padding: 56px 0 48px; }
  .hero-stats { grid-template-columns: repeat(2, 1fr); gap: 22px; }
  .section { padding: 60px 0; }
  .footer-grid { grid-template-columns: 1fr; gap: 32px; }
  .trusted-logos { gap: 24px; font-size: 0.9rem; }
}