/* ============================================
   圣利威科技 SLW Tech - 官网样式表
   智能医疗电子方案提供商
   ============================================ */

/* ===== CSS Variables ===== */
:root {
  --primary: #1B6EF3;
  --primary-dark: #0F4C81;
  --primary-light: #EBF2FE;
  --accent: #10B981;
  --accent-light: #ECFDF5;
  --dark: #1E293B;
  --gray-800: #334155;
  --gray-600: #64748B;
  --gray-400: #94A3B8;
  --gray-200: #E2E8F0;
  --gray-100: #F1F5F9;
  --gray-50: #F8FAFC;
  --white: #FFFFFF;
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.08);
  --shadow: 0 4px 16px rgba(0,0,0,0.08);
  --shadow-lg: 0 10px 40px rgba(0,0,0,0.1);
  --radius: 12px;
  --radius-sm: 8px;
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  --max-width: 1200px;
  --nav-height: 72px;
}

/* ===== Reset ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; scroll-padding-top: var(--nav-height); }
body {
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.7;
  color: var(--gray-800);
  background: var(--white);
  -webkit-font-smoothing: antialiased;
}
a { text-decoration: none; color: inherit; }
ul { list-style: none; }
img { max-width: 100%; display: block; }
svg { display: block; }

/* ===== Utility ===== */
[data-zh] [data-en] { display: inline; }
.lang-en [data-zh] { display: none !important; }
.lang-zh [data-en] { display: none !important; }
.lang-en [data-en] { display: inline !important; }
.lang-zh [data-zh] { display: inline !important; }

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

/* ===== Section Common ===== */
.section { padding: 80px 0; }
.section-tag {
  display: inline-block;
  padding: 6px 16px;
  background: var(--primary-light);
  color: var(--primary);
  font-size: 13px;
  font-weight: 700;
  border-radius: 100px;
  margin-bottom: 16px;
  letter-spacing: 0.5px;
}
.section-header { text-align: center; margin-bottom: 56px; }
.section-header h2 {
  font-size: 32px;
  font-weight: 800;
  color: var(--dark);
  margin-bottom: 12px;
}
.section-header p {
  font-size: 16px;
  color: var(--gray-600);
  max-width: 640px;
  margin: 0 auto;
}

/* ===== Navbar ===== */
.navbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: var(--nav-height);
  background: rgba(255,255,255,0.95);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--gray-200);
  z-index: 1000;
  transition: all 0.3s;
}
.navbar .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}
.nav-logo {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  line-height: 1.1;
  text-decoration: none;
}
.nav-logo .logo-text {
  font-family: 'Noto Sans SC', 'Microsoft YaHei', sans-serif;
  font-size: 22px;
  font-weight: 900;
  color: var(--dark);
  letter-spacing: 2px;
}
.nav-logo .logo-sub {
  font-family: 'Inter', Arial, sans-serif;
  font-size: 11px;
  font-weight: 700;
  color: var(--accent);
  letter-spacing: 3px;
  margin-top: 2px;
}
.nav-links { display: flex; gap: 4px; }
.nav-links a {
  padding: 8px 18px;
  border-radius: var(--radius-sm);
  font-size: 15px;
  font-weight: 500;
  color: var(--gray-600);
  transition: all 0.2s;
}
.nav-links a:hover,
.nav-links a.active { color: var(--primary); background: var(--primary-light); }
.nav-right { display: flex; align-items: center; gap: 12px; }
.lang-toggle {
  padding: 6px 14px;
  border: 1.5px solid var(--gray-200);
  border-radius: 100px;
  font-size: 13px;
  font-weight: 600;
  color: var(--gray-600);
  background: transparent;
  cursor: pointer;
  transition: all 0.2s;
}
.lang-toggle:hover { border-color: var(--primary); color: var(--primary); }
.mobile-menu-btn {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
}
.mobile-menu-btn span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--dark);
  margin: 5px 0;
  border-radius: 2px;
  transition: all 0.3s;
}

/* ===== Hero ===== */
.hero {
  padding-top: calc(var(--nav-height) + 60px);
  padding-bottom: 60px;
  background: linear-gradient(135deg, #F0F7FF 0%, #EBF2FE 40%, #E8F5E9 100%);
  overflow: hidden;
}
.hero .container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}
.hero-content { max-width: 560px; }
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 16px;
  background: white;
  border-radius: 100px;
  font-size: 13px;
  font-weight: 600;
  color: var(--primary);
  margin-bottom: 24px;
  box-shadow: var(--shadow-sm);
}
.hero-badge .dot {
  width: 8px;
  height: 8px;
  background: var(--accent);
  border-radius: 50%;
  animation: pulse 2s infinite;
}
@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(1.3); }
}
.hero-content h1 {
  font-size: 44px;
  font-weight: 900;
  line-height: 1.2;
  color: var(--dark);
  margin-bottom: 20px;
}
.hero-content h1 span { color: var(--primary); }
.hero-content .hero-desc {
  font-size: 17px;
  color: var(--gray-600);
  margin-bottom: 32px;
  line-height: 1.8;
}
.hero-actions { display: flex; gap: 12px; flex-wrap: wrap; }
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 13px 28px;
  border-radius: var(--radius-sm);
  font-size: 15px;
  font-weight: 600;
  border: none;
  cursor: pointer;
  transition: all 0.25s;
  text-align: center;
}
.btn-primary {
  background: var(--primary);
  color: white;
  box-shadow: 0 4px 14px rgba(27,110,243,0.3);
}
.btn-primary:hover {
  background: #155AD8;
  box-shadow: 0 6px 20px rgba(27,110,243,0.4);
  transform: translateY(-1px);
}
.btn-outline {
  background: white;
  color: var(--primary);
  border: 2px solid var(--primary);
}
.btn-outline:hover { background: var(--primary-light); }
.hero-stats { display: flex; gap: 40px; margin-top: 40px; padding-top: 32px; border-top: 1px solid rgba(0,0,0,0.08); }
.hero-stat { text-align: center; }
.hero-stat .num {
  font-size: 28px;
  font-weight: 900;
  color: var(--primary);
  line-height: 1;
}
.hero-stat .label { font-size: 13px; color: var(--gray-600); margin-top: 6px; }
.hero-visual {
  position: relative;
}
.hero-visual .hero-card {
  background: white;
  border-radius: 20px;
  padding: 32px;
  box-shadow: var(--shadow-lg);
  position: relative;
  z-index: 2;
}
.hero-visual .hero-card .card-title {
  font-size: 15px;
  font-weight: 700;
  color: var(--dark);
  margin-bottom: 20px;
  display: flex;
  align-items: center;
  gap: 8px;
}
.hero-visual .hero-card .card-title .icon {
  width: 32px; height: 32px;
  background: var(--primary-light);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
}
.hero-visual .solution-list { display: flex; flex-direction: column; gap: 12px; }
.hero-visual .solution-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 16px;
  background: var(--gray-50);
  border-radius: var(--radius-sm);
  font-size: 14px;
  font-weight: 500;
  color: var(--gray-800);
  transition: all 0.2s;
  border: 1px solid transparent;
}
.hero-visual .solution-item:hover {
  background: white;
  border-color: var(--primary);
  box-shadow: var(--shadow-sm);
}
.hero-visual .solution-item .check {
  width: 20px; height: 20px;
  background: var(--accent-light);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}
.hero-visual .floating-badge {
  position: absolute;
  padding: 10px 18px;
  background: white;
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow);
  font-size: 13px;
  font-weight: 600;
  color: var(--primary);
  z-index: 3;
}
.hero-visual .floating-badge.top-right { top: -15px; right: -20px; }

/* ===== Products Section ===== */
#solutions { background: white; }
.solution-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-bottom: 32px;
}
.solution-card {
  background: white;
  border: 1px solid var(--gray-200);
  border-radius: var(--radius);
  padding: 28px;
  transition: all 0.3s;
  cursor: pointer;
  display: flex;
  flex-direction: column;
  position: relative;
  overflow: hidden;
}
.solution-card:hover {
  border-color: var(--primary);
  box-shadow: 0 8px 30px rgba(27,110,243,0.1);
  transform: translateY(-4px);
}
.solution-card .card-icon {
  width: 52px; height: 52px;
  background: var(--primary-light);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
  flex-shrink: 0;
}
.solution-card .card-tag {
  position: absolute;
  top: 20px;
  right: 20px;
  padding: 3px 10px;
  background: var(--accent-light);
  color: var(--accent);
  font-size: 11px;
  font-weight: 700;
  border-radius: 100px;
}
.solution-card h3 {
  font-size: 18px;
  font-weight: 700;
  color: var(--dark);
  margin-bottom: 8px;
}
.solution-card .card-desc {
  font-size: 14px;
  color: var(--gray-600);
  line-height: 1.6;
  flex: 1;
}
.solution-card .card-variants {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 16px;
  padding-top: 16px;
  border-top: 1px solid var(--gray-100);
}
.solution-card .card-variants span {
  padding: 3px 10px;
  background: var(--gray-50);
  border-radius: 100px;
  font-size: 12px;
  color: var(--gray-600);
  white-space: nowrap;
}

/* ===== Advantages Section ===== */
#advantages { background: var(--gray-50); }
.adv-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.adv-card {
  background: white;
  border-radius: var(--radius);
  padding: 32px 28px;
  border: 1px solid var(--gray-200);
  transition: all 0.3s;
}
.adv-card:hover { box-shadow: var(--shadow-lg); transform: translateY(-2px); }
.adv-card .adv-icon {
  width: 48px; height: 48px;
  background: var(--primary-light);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
}
.adv-card h3 {
  font-size: 17px;
  font-weight: 700;
  color: var(--dark);
  margin-bottom: 8px;
}
.adv-card p {
  font-size: 14px;
  color: var(--gray-600);
  line-height: 1.7;
}

/* ===== About Section ===== */
#about { background: white; }
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}
.about-content h3 {
  font-size: 24px;
  font-weight: 800;
  color: var(--dark);
  margin-bottom: 16px;
}
.about-content p {
  font-size: 15px;
  color: var(--gray-600);
  margin-bottom: 16px;
  line-height: 1.8;
}
.about-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 24px;
}
.about-tags span {
  padding: 8px 16px;
  background: var(--gray-50);
  border: 1px solid var(--gray-200);
  border-radius: 100px;
  font-size: 13px;
  font-weight: 600;
  color: var(--gray-600);
}
.about-image {
  position: relative;
}
.about-image .img-placeholder {
  width: 100%;
  aspect-ratio: 4/3;
  background: linear-gradient(135deg, var(--primary-light), var(--accent-light));
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 12px;
}
.about-image .img-placeholder .big-num {
  font-size: 64px;
  font-weight: 900;
  color: var(--primary);
  opacity: 0.2;
}
.about-image .img-placeholder span {
  font-size: 16px;
  font-weight: 600;
  color: var(--primary-dark);
}
.about-stats {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
  margin-top: 24px;
}
.about-stat-card {
  text-align: center;
  padding: 16px;
  background: var(--gray-50);
  border-radius: var(--radius-sm);
}
.about-stat-card .val {
  font-size: 28px;
  font-weight: 900;
  color: var(--primary);
}
.about-stat-card .lbl {
  font-size: 12px;
  color: var(--gray-600);
  margin-top: 4px;
}

/* ===== Process / Capabilities ===== */
#process { background: var(--gray-50); }
.process-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}
.process-card {
  text-align: center;
  padding: 32px 20px;
  background: white;
  border-radius: var(--radius);
  border: 1px solid var(--gray-200);
  transition: all 0.3s;
  position: relative;
}
.process-card:hover { box-shadow: var(--shadow-lg); }
.process-card .step-num {
  width: 36px; height: 36px;
  margin: 0 auto 16px;
  background: var(--primary);
  color: white;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
  font-weight: 800;
}
.process-card h4 {
  font-size: 16px;
  font-weight: 700;
  color: var(--dark);
  margin-bottom: 8px;
}
.process-card p {
  font-size: 13px;
  color: var(--gray-600);
  line-height: 1.6;
}

/* ===== Contact Section ===== */
#contact { background: white; }
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  align-items: start;
}
.contact-info h3 {
  font-size: 22px;
  font-weight: 800;
  color: var(--dark);
  margin-bottom: 24px;
}
.contact-info .contact-item {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  margin-bottom: 20px;
}
.contact-info .contact-item .ci-icon {
  width: 40px; height: 40px;
  background: var(--primary-light);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}
.contact-info .contact-item .ci-text h4 {
  font-size: 14px;
  font-weight: 700;
  color: var(--dark);
  margin-bottom: 4px;
}
.contact-info .contact-item .ci-text span {
  font-size: 14px;
  color: var(--gray-600);
}
.contact-form {
  background: var(--gray-50);
  border-radius: var(--radius);
  padding: 32px;
}
.contact-form h4 {
  font-size: 17px;
  font-weight: 700;
  color: var(--dark);
  margin-bottom: 20px;
}
.form-group { margin-bottom: 16px; }
.form-group label {
  display: block;
  font-size: 13px;
  font-weight: 600;
  color: var(--gray-800);
  margin-bottom: 6px;
}
.form-group input,
.form-group textarea,
.form-group select {
  width: 100%;
  padding: 12px 16px;
  border: 1.5px solid var(--gray-200);
  border-radius: var(--radius-sm);
  font-family: var(--font);
  font-size: 14px;
  color: var(--dark);
  background: white;
  transition: all 0.2s;
  outline: none;
}
.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(27,110,243,0.1);
}
.form-group textarea { resize: vertical; min-height: 100px; }
.form-submit {
  width: 100%;
  margin-top: 8px;
}

/* ===== Footer ===== */
.footer {
  background: var(--dark);
  color: white;
  padding: 48px 0 24px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
  padding-bottom: 32px;
  border-bottom: 1px solid rgba(255,255,255,0.1);
}
.footer-brand .footer-logo {
  font-size: 20px;
  font-weight: 800;
  color: white;
  margin-bottom: 12px;
}
.footer-brand p {
  font-size: 13px;
  color: rgba(255,255,255,0.6);
  line-height: 1.6;
}
.footer-col h5 {
  font-size: 14px;
  font-weight: 700;
  color: white;
  margin-bottom: 16px;
}
.footer-col ul { display: flex; flex-direction: column; gap: 10px; }
.footer-col ul a {
  font-size: 13px;
  color: rgba(255,255,255,0.6);
  transition: color 0.2s;
}
.footer-col ul a:hover { color: white; }
.footer-bottom {
  padding-top: 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 13px;
  color: rgba(255,255,255,0.4);
}

/* ===== Product Detail Pages (Common) ===== */
.product-hero {
  padding-top: calc(var(--nav-height) + 40px);
  padding-bottom: 40px;
  background: linear-gradient(135deg, var(--primary-light), var(--accent-light));
}
.product-hero .container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
}
.product-hero-info h1 {
  font-size: 34px;
  font-weight: 900;
  color: var(--dark);
  margin-bottom: 16px;
}
.product-hero-info .subtitle {
  font-size: 16px;
  color: var(--gray-600);
  line-height: 1.8;
  margin-bottom: 24px;
}
.product-meta { display: flex; gap: 12px; flex-wrap: wrap; }
.product-hero-image {
  background: white;
  border-radius: var(--radius);
  padding: 20px;
  box-shadow: var(--shadow-lg);
  display: flex;
  align-items: center;
  justify-content: center;
}
.product-hero-image .img-box {
  width: 100%;
  aspect-ratio: 4/3;
  background: var(--gray-100);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 8px;
}
.product-hero-image .img-box .placeholder-text {
  font-size: 14px;
  color: var(--gray-400);
}
/* Breadcrumb */
.breadcrumb {
  padding: 16px 0;
  font-size: 14px;
  color: var(--gray-400);
}
.breadcrumb a { color: var(--gray-600); }
.breadcrumb a:hover { color: var(--primary); }
.breadcrumb span { color: var(--primary); font-weight: 600; }

/* Spec Table */
.spec-section { padding: 60px 0; background: white; }
.spec-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
}
.spec-card {
  background: var(--gray-50);
  border-radius: var(--radius);
  padding: 28px;
  border: 1px solid var(--gray-200);
}
.spec-card h4 {
  font-size: 16px;
  font-weight: 700;
  color: var(--dark);
  margin-bottom: 16px;
  padding-bottom: 12px;
  border-bottom: 2px solid var(--primary);
}
.spec-table { width: 100%; }
.spec-table tr { border-bottom: 1px solid var(--gray-200); }
.spec-table tr:last-child { border-bottom: none; }
.spec-table td {
  padding: 10px 0;
  font-size: 14px;
  color: var(--gray-600);
}
.spec-table td:first-child {
  font-weight: 600;
  color: var(--gray-800);
  width: 40%;
}

/* Feature Cards */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}
.feature-card {
  background: white;
  border: 1px solid var(--gray-200);
  border-radius: var(--radius);
  padding: 24px;
  text-align: center;
  transition: all 0.3s;
}
.feature-card:hover { border-color: var(--primary); box-shadow: var(--shadow); }
.feature-card .fc-icon {
  width: 48px; height: 48px;
  margin: 0 auto 16px;
  background: var(--primary-light);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
}
.feature-card h4 { font-size: 15px; font-weight: 700; color: var(--dark); margin-bottom: 6px; }
.feature-card p { font-size: 13px; color: var(--gray-600); line-height: 1.5; }

/* Variant cards */
.variant-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 16px;
  margin-top: 24px;
}
.variant-card {
  background: white;
  border: 2px solid var(--gray-200);
  border-radius: var(--radius-sm);
  padding: 20px;
  text-align: center;
  transition: all 0.3s;
}
.variant-card:hover { border-color: var(--primary); }
.variant-card h5 { font-size: 15px; font-weight: 700; color: var(--dark); }
.variant-card p { font-size: 13px; color: var(--gray-600); margin-top: 4px; }

/* Breadcrumb area */
.bc { padding: 20px 0; font-size: 13px; }
.bc a { color: var(--gray-600); }
.bc a:hover { color: var(--primary); }
.bc .sep { margin: 0 8px; color: var(--gray-400); }

/* PCB section */
.pcb-section { padding: 60px 0; background: var(--gray-50); }
.pcb-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}
.pcb-card {
  background: white;
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--gray-200);
}
.pcb-card .pcb-img {
  width: 100%;
  aspect-ratio: 16/10;
  background: var(--gray-100);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 8px;
}
.pcb-card .pcb-img svg { opacity: 0.3; }
.pcb-card .pcb-img span { font-size: 14px; color: var(--gray-400); }
.pcb-card .pcb-label {
  padding: 12px 16px;
  font-size: 14px;
  font-weight: 600;
  color: var(--dark);
  text-align: center;
  background: var(--gray-50);
}

/* Application Section */
.app-section { padding: 60px 0; background: white; }
.app-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}
.app-card {
  text-align: center;
  padding: 24px;
  background: var(--gray-50);
  border-radius: var(--radius);
  border: 1px solid var(--gray-200);
}
.app-card .app-icon {
  width: 44px; height: 44px;
  margin: 0 auto 12px;
  background: var(--primary-light);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
}
.app-card h4 { font-size: 15px; font-weight: 700; color: var(--dark); margin-bottom: 4px; }
.app-card p { font-size: 13px; color: var(--gray-600); }

/* ===== Back to top ===== */
.back-to-top {
  position: fixed;
  bottom: 30px;
  right: 30px;
  width: 44px;
  height: 44px;
  background: var(--primary);
  color: white;
  border: none;
  border-radius: 50%;
  cursor: pointer;
  box-shadow: var(--shadow);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transition: all 0.3s;
  z-index: 999;
}
.back-to-top.visible { opacity: 1; visibility: visible; }
.back-to-top:hover { background: var(--primary-dark); transform: translateY(-2px); }

/* ===== Responsive ===== */
@media (max-width: 1024px) {
  .hero .container { grid-template-columns: 1fr; gap: 40px; }
  .hero-content { max-width: 100%; text-align: center; }
  .hero-actions { justify-content: center; }
  .hero-stats { justify-content: center; }
  .hero-content h1 { font-size: 34px; }
  .solution-grid { grid-template-columns: repeat(2, 1fr); }
  .adv-grid { grid-template-columns: repeat(2, 1fr); }
  .about-grid { grid-template-columns: 1fr; }
  .process-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .product-hero .container { grid-template-columns: 1fr; }
  .spec-grid { grid-template-columns: 1fr; }
  .feature-grid { grid-template-columns: repeat(2, 1fr); }
  .pcb-grid { grid-template-columns: 1fr; }
}

@media (max-width: 768px) {
  .nav-links { display: none; }
  .mobile-menu-btn { display: block; }
  .nav-links.mobile-open {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: var(--nav-height);
    left: 0; right: 0;
    background: white;
    border-bottom: 1px solid var(--gray-200);
    padding: 16px 24px;
    box-shadow: var(--shadow-lg);
  }
  .section { padding: 60px 0; }
  .section-header h2 { font-size: 26px; }
  .hero-content h1 { font-size: 28px; }
  .solution-grid { grid-template-columns: 1fr; }
  .adv-grid { grid-template-columns: 1fr; }
  .process-grid { grid-template-columns: 1fr 1fr; }
  .contact-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .feature-grid { grid-template-columns: 1fr; }
  .app-grid { grid-template-columns: 1fr 1fr; }
  .hero-stats { gap: 20px; flex-wrap: wrap; }
}

@media (max-width: 480px) {
  .hero-stats { gap: 16px; }
  .hero-stat .num { font-size: 22px; }
  .process-grid { grid-template-columns: 1fr; }
  .app-grid { grid-template-columns: 1fr; }
}