/* ==========================================
   万维云软件工作室 - 大气现代风格
   ========================================== */

/* Reset & Base */
*,
*::before,
*::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Helvetica, Arial, sans-serif;
  font-size: 16px;
  line-height: 1.8;
  color: #374151;
  background: #fff;
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; text-decoration: none; }
ul, ol { list-style: none; }
img { max-width: 100%; height: auto; display: block; }

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 40px;
}

/* ==========================================
   Header
   ========================================== */
.header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.2);
  transition: all 0.3s;
}
.header.scrolled {
  background: rgba(255, 255, 255, 0.96);
  border-bottom: 1px solid rgba(0, 0, 0, 0.06);
  box-shadow: 0 2px 20px rgba(0, 0, 0, 0.06);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}
.logo {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 20px;
  font-weight: 700;
  color: #111827;
}
.logo-icon {
  width: 40px;
  height: 40px;
  background: linear-gradient(135deg, #2563eb, #7c3aed);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 22px;
  font-weight: 700;
}
.nav { display: flex; align-items: center; gap: 4px; }
.nav a {
  padding: 8px 20px;
  border-radius: 8px;
  font-size: 15px;
  font-weight: 500;
  color: #4b5563;
  transition: all 0.2s;
}
.nav a:hover { color: #2563eb; background: rgba(37, 99, 235, 0.06); }
.nav a.active { color: #2563eb; background: rgba(37, 99, 235, 0.08); }

/* ==========================================
   Hero Section
   ========================================== */
.hero {
  position: relative;
  padding: 120px 0 140px;
  text-align: center;
  background: url(../images/lsjz_banner.jpg) center/cover no-repeat;
  overflow: hidden;
}
.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(160deg, rgba(15, 23, 42, 0.5) 0%, rgba(15, 23, 42, 0.38) 50%, rgba(15, 23, 42, 0.5) 100%);
  z-index: 1;
}
/* 装饰性光晕 */
.hero::after {
  content: '';
  position: absolute;
  width: 600px;
  height: 600px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(37, 99, 235, 0.15), transparent 70%);
  top: -100px;
  right: -100px;
  z-index: 1;
}
.hero .container { position: relative; z-index: 2; }

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 20px;
  background: rgba(255, 255, 255, 0.12);
  border: 1px solid rgba(255, 255, 255, 0.2);
  color: rgba(255, 255, 255, 0.9);
  border-radius: 50px;
  font-size: 14px;
  font-weight: 500;
  margin-bottom: 32px;
  backdrop-filter: blur(8px);
}
.hero-badge .dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #10b981;
  box-shadow: 0 0 8px rgba(16, 185, 129, 0.6);
  animation: pulse-dot 2s infinite;
}
@keyframes pulse-dot {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.4; }
}

.hero h1 {
  font-size: 56px;
  font-weight: 900;
  color: #ffffff;
  line-height: 1.2;
  margin-bottom: 24px;
  letter-spacing: -0.03em;
  text-shadow: 0 2px 12px rgba(0, 0, 0, 0.3);
}
.hero h1 span {
  background: linear-gradient(135deg, #93c5fd, #a5b4fc, #6ee7b7);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.hero p {
  font-size: 19px;
  color: rgba(255, 255, 255, 0.8);
  max-width: 640px;
  margin: 0 auto 48px;
  line-height: 1.9;
}
.hero-actions {
  display: flex;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
}

/* 统计数据条 */
.hero-stats {
  display: flex;
  justify-content: center;
  gap: 60px;
  margin-top: 64px;
  padding-top: 48px;
  border-top: 1px solid rgba(255, 255, 255, 0.15);
}
.hero-stats .stat-item {
  text-align: center;
}
.hero-stats .stat-num {
  font-size: 36px;
  font-weight: 800;
  color: #fff;
  line-height: 1.2;
}
.hero-stats .stat-label {
  font-size: 14px;
  color: rgba(255, 255, 255, 0.65);
  margin-top: 4px;
}

/* ==========================================
   Products Section
   ========================================== */
.products-section {
  padding: 100px 0;
  position: relative;
  background: #f8fafc;
}
.products-section::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, #cbd5e1, transparent);
}
.products-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  margin-top: -120px;
  position: relative;
  z-index: 3;
}

.product-card {
  background: #fff;
  border-radius: 20px;
  padding: 52px 44px;
  transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  position: relative;
  overflow: hidden;
  box-shadow: 0 4px 24px rgba(0, 0, 0, 0.06), 0 1px 3px rgba(0, 0, 0, 0.04);
}
.product-card::after {
  content: '';
  position: absolute;
  width: 200px;
  height: 200px;
  border-radius: 50%;
  opacity: 0.06;
  transition: all 0.4s;
  pointer-events: none;
}
.product-card.blue::after {
  background: #2563eb;
  top: -60px;
  right: -60px;
}
.product-card.green::after {
  background: #059669;
  top: -60px;
  right: -60px;
}
.product-card:hover {
  transform: translateY(-8px);
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.1), 0 4px 12px rgba(0, 0, 0, 0.05);
}
.product-card:hover::after {
  opacity: 0.1;
  transform: scale(1.3);
}
.product-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 5px;
  border-radius: 20px 20px 0 0;
}
.product-card.blue::before { background: linear-gradient(90deg, #2563eb, #6366f1, #8b5cf6); }
.product-card.green::before { background: linear-gradient(90deg, #059669, #10b981, #34d399); }

.product-icon {
  width: 64px;
  height: 64px;
  border-radius: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 30px;
  margin-bottom: 28px;
  position: relative;
  z-index: 1;
}
.product-icon.blue { background: linear-gradient(135deg, #eff6ff, #dbeafe); color: #2563eb; }
.product-icon.green { background: linear-gradient(135deg, #ecfdf5, #d1fae5); color: #059669; }

.product-card h2 {
  font-size: 26px;
  font-weight: 800;
  color: #111827;
  margin-bottom: 16px;
  position: relative;
  z-index: 1;
}
.product-card .subtitle {
  font-size: 15px;
  color: #6b7280;
  line-height: 1.9;
  margin-bottom: 28px;
  min-height: 84px;
  position: relative;
  z-index: 1;
}
.product-features {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 32px;
  position: relative;
  z-index: 1;
}
.product-features span {
  padding: 6px 16px;
  background: #f3f4f6;
  border-radius: 8px;
  font-size: 13px;
  color: #4b5563;
  font-weight: 500;
}
.product-card .actions {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  position: relative;
  z-index: 1;
}

/* ==========================================
   Buttons
   ========================================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 28px;
  border-radius: 10px;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  border: none;
  transition: all 0.25s;
  white-space: nowrap;
  font-family: inherit;
}
.btn-primary {
  background: linear-gradient(135deg, #2563eb, #1d4ed8);
  color: #fff;
  box-shadow: 0 4px 14px rgba(37, 99, 235, 0.25);
}
.btn-primary:hover {
  background: linear-gradient(135deg, #1d4ed8, #1e40af);
  box-shadow: 0 6px 20px rgba(37, 99, 235, 0.4);
  transform: translateY(-1px);
}
.btn-outline {
  background: #fff;
  color: #374151;
  border: 2px solid #e5e7eb;
}
.btn-outline:hover {
  border-color: #2563eb;
  color: #2563eb;
  background: #f8faff;
}
.btn-lg { padding: 16px 40px; font-size: 17px; border-radius: 14px; }
.btn-sm { padding: 8px 18px; font-size: 13px; border-radius: 8px; font-weight: 500; }

/* QR Row */
.qr-row {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-top: 16px;
  padding: 12px 16px;
  background: #f9fafb;
  border-radius: 10px;
  border: 1px solid #e5e7eb;
  position: relative;
  z-index: 1;
}
.qr-row img { width: 100px; height: 100px; border-radius: 8px; }
.qr-row span { font-size: 13px; color: #6b7280; }

/* ==========================================
   Features
   ========================================== */
.features {
  padding: 100px 0;
  position: relative;
}
.section-header { text-align: center; margin-bottom: 72px; }
.section-label {
  display: inline-block;
  padding: 6px 16px;
  background: rgba(37, 99, 235, 0.06);
  color: #2563eb;
  border-radius: 50px;
  font-size: 13px;
  font-weight: 600;
  margin-bottom: 20px;
  letter-spacing: 0.05em;
}
.section-header h2 {
  font-size: 38px;
  font-weight: 800;
  color: #111827;
  margin-bottom: 16px;
  letter-spacing: -0.02em;
}
.section-header p {
  font-size: 17px;
  color: #6b7280;
  max-width: 520px;
  margin: 0 auto;
  line-height: 1.8;
}
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}
.feature-item {
  background: #fff;
  border: 1px solid #f0f0f0;
  border-radius: 18px;
  padding: 44px 32px;
  transition: all 0.35s;
  position: relative;
  overflow: hidden;
}
.feature-item:hover {
  border-color: #dbeafe;
  box-shadow: 0 16px 48px rgba(37, 99, 235, 0.06);
  transform: translateY(-4px);
}
.feature-item::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 3px;
  border-radius: 0 0 18px 18px;
  background: linear-gradient(90deg, transparent, #2563eb, transparent);
  opacity: 0;
  transition: opacity 0.35s;
}
.feature-item:hover::after { opacity: 1; }
.feature-icon {
  width: 56px;
  height: 56px;
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 26px;
  margin-bottom: 24px;
}
.feature-icon.shield { background: linear-gradient(135deg, #eff6ff, #dbeafe); color: #2563eb; }
.feature-icon.star { background: linear-gradient(135deg, #fffbeb, #fef3c7); color: #d97706; }
.feature-icon.heart { background: linear-gradient(135deg, #ecfdf5, #d1fae5); color: #059669; }
.feature-item h3 { font-size: 19px; font-weight: 700; color: #111827; margin-bottom: 10px; }
.feature-item p { font-size: 15px; color: #6b7280; line-height: 1.8; }

/* ==========================================
   Trust Bar
   ========================================== */
.trust-bar {
  padding: 60px 0;
  background: #fff;
  border-top: 1px solid #f0f0f0;
  border-bottom: 1px solid #f0f0f0;
}
.trust-bar-inner {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 80px;
  flex-wrap: wrap;
}
.trust-item {
  display: flex;
  align-items: center;
  gap: 16px;
}
.trust-icon-wrap {
  width: 52px;
  height: 52px;
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}
.trust-icon-wrap.blue { background: #eff6ff; color: #2563eb; }
.trust-icon-wrap.amber { background: #fffbeb; color: #d97706; }
.trust-icon-wrap.emerald { background: #ecfdf5; color: #059669; }
.trust-text strong { display: block; font-size: 18px; font-weight: 700; color: #111827; }
.trust-text span { font-size: 13px; color: #9ca3af; }

/* ==========================================
   Certificates
   ========================================== */
.certificates {
  padding: 100px 0;
  background: #f8fafc;
  position: relative;
  overflow: hidden;
}
.cert-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  margin-bottom: 48px;
}
.cert-item {
  background: #fff;
  border-radius: 16px;
  padding: 20px;
  border: 1px solid #e5e7eb;
  transition: all 0.35s;
  position: relative;
  overflow: hidden;
}
.cert-item::before {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: 16px;
  border: 2px solid transparent;
  transition: border-color 0.35s;
}
.cert-item:hover { transform: translateY(-6px); box-shadow: 0 20px 50px rgba(0, 0, 0, 0.08); }
.cert-item:hover::before { border-color: #2563eb; }
.cert-item img {
  width: 100%;
  border-radius: 8px;
  display: block;
}
.cert-item .cert-label {
  display: block;
  text-align: center;
  font-size: 13px;
  font-weight: 600;
  color: #6b7280;
  margin-top: 12px;
  letter-spacing: 0.02em;
}
.cert-item .cert-badge {
  position: absolute;
  top: 12px;
  right: 12px;
  background: linear-gradient(135deg, #dc2626, #b91c1c);
  color: #fff;
  font-size: 11px;
  font-weight: 700;
  padding: 3px 10px;
  border-radius: 4px;
  letter-spacing: 0.06em;
  opacity: 0.92;
}

/* Security Badges & Microsoft Store */
.security-badges {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 20px;
  flex-wrap: wrap;
  margin-top: 40px;
  padding: 24px 0;
  border-top: 1px solid #e5e7eb;
}
.security-badges .sec-badge-main {
  height: 52px;
  border-radius: 8px;
}
.sec-badge-row {
  display: flex;
  align-items: center;
  gap: 6px;
  flex-wrap: wrap;
}
.sec-badge-row img {
  height: 38px;
  border-radius: 4px;
}
.ms-store {
  text-align: center;
  margin-top: 32px;
}
.ms-store a {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: #111827;
  color: #fff;
  padding: 12px 28px;
  border-radius: 10px;
  font-size: 14px;
  font-weight: 600;
  transition: all 0.2s;
}
.ms-store a:hover { background: #1f2937; transform: translateY(-1px); box-shadow: 0 8px 24px rgba(0,0,0,0.15); }

/* ==========================================
   Architecture
   ========================================== */
.architecture {
  padding: 100px 0;
  background: linear-gradient(180deg, #fff 0%, #f8fafc 100%);
}
.arch-card {
  background: #fff;
  border: 1px solid #e5e7eb;
  border-radius: 20px;
  padding: 8px;
  box-shadow: 0 4px 24px rgba(0, 0, 0, 0.04);
  transition: box-shadow 0.3s;
}
.arch-card:hover { box-shadow: 0 12px 48px rgba(37, 99, 235, 0.08); }
.arch-card img {
  border-radius: 14px;
  width: 100%;
  display: block;
}

/* ==========================================
   Product Detail Pages
   ========================================== */
.product-hero {
  padding: 80px 0 100px;
  background: linear-gradient(160deg, #f0f5ff 0%, #f8fafc 40%, #f0fdf4 100%);
}
.product-hero-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 72px;
  align-items: center;
}
.product-hero-text h1 {
  font-size: 44px;
  font-weight: 900;
  color: #111827;
  line-height: 1.2;
  margin-bottom: 20px;
  letter-spacing: -0.02em;
}
.product-hero-text .desc {
  font-size: 17px;
  color: #6b7280;
  line-height: 1.9;
  margin-bottom: 28px;
}
.product-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-bottom: 32px;
}
.product-meta span {
  padding: 6px 16px;
  background: #fff;
  border: 1px solid #e5e7eb;
  border-radius: 8px;
  font-size: 13px;
  color: #4b5563;
}
.product-hero-image { text-align: center; }
.product-hero-image video {
  border-radius: 16px;
  box-shadow: 0 24px 80px rgba(0, 0, 0, 0.1);
  width: 100%;
}

.product-intro { padding: 100px 0; }
.product-intro h2 {
  font-size: 30px;
  font-weight: 800;
  color: #111827;
  margin-bottom: 36px;
  padding-left: 20px;
  border-left: 5px solid #2563eb;
}
.product-intro-grid {
  display: grid;
  grid-template-columns: 1fr 320px;
  gap: 60px;
  align-items: start;
}
.intro-text { font-size: 16px; line-height: 2.1; color: #374151; }
.intro-text b { color: #111827; }
.intro-image img { border-radius: 14px; box-shadow: 0 8px 32px rgba(0, 0, 0, 0.06); }

.feature-detail { padding: 100px 0; background: #f9fafb; }
.feature-detail-grid {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 60px;
  align-items: center;
}
.feature-detail-grid img { border-radius: 14px; }
.feature-detail-grid h3 {
  font-size: 26px;
  font-weight: 800;
  color: #111827;
  margin-bottom: 20px;
}
.feature-detail-grid p {
  font-size: 16px;
  color: #6b7280;
  line-height: 2;
  margin-bottom: 14px;
}

/* ==========================================
   Testimonials
   ========================================== */
.testimonials { padding: 100px 0; background: #fff; }
.testimonial-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
}
.testimonial-card {
  background: #fff;
  border: 1px solid #f0f0f0;
  border-radius: 18px;
  padding: 36px 40px;
  display: flex;
  gap: 20px;
  align-items: flex-start;
  transition: all 0.3s;
}
.testimonial-card:hover {
  border-color: #dbeafe;
  box-shadow: 0 12px 40px rgba(37, 99, 235, 0.05);
}
.testimonial-avatar {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: linear-gradient(135deg, #e5e7eb, #d1d5db);
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
}
.testimonial-content .name { font-size: 16px; font-weight: 700; color: #111827; margin-bottom: 10px; }
.testimonial-content .text { font-size: 15px; color: #6b7280; line-height: 1.8; }

/* ==========================================
   CTA Section
   ========================================== */
.cta-section {
  padding: 80px 0;
  text-align: center;
  background: linear-gradient(135deg, #1e3a5f, #1e40af);
  color: #fff;
}
.cta-section h2 { font-size: 34px; font-weight: 800; margin-bottom: 16px; }
.cta-section p { font-size: 17px; opacity: 0.8; margin-bottom: 36px; }
.cta-section .btn-primary {
  background: #fff;
  color: #2563eb;
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.15);
}
.cta-section .btn-primary:hover { background: #f0f5ff; }

/* ==========================================
   Footer
   ========================================== */
.footer {
  background: #0f172a;
  color: #94a3b8;
  padding: 64px 0 36px;
}
.footer-inner {
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 40px;
  margin-bottom: 48px;
}
.footer-brand h3 { font-size: 20px; font-weight: 700; color: #f1f5f9; margin-bottom: 14px; }
.footer-brand p { font-size: 14px; line-height: 1.9; max-width: 280px; }
.footer-links h4 { font-size: 14px; font-weight: 600; color: #e2e8f0; margin-bottom: 16px; letter-spacing: 0.04em; }
.footer-links a {
  display: block;
  font-size: 14px;
  color: #94a3b8;
  padding: 5px 0;
  transition: color 0.2s;
}
.footer-links a:hover { color: #f1f5f9; }
.footer-bottom {
  border-top: 1px solid #1e293b;
  padding-top: 28px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
  font-size: 13px;
  color: #64748b;
}
.footer-bottom a { color: #94a3b8; }
.footer-bottom a:hover { color: #e2e8f0; }
.beian { display: inline-flex; align-items: center; gap: 6px; }

/* ==========================================
   Sidebar Contact
   ========================================== */
.sidebar-contact {
  position: fixed;
  right: 0;
  top: 50%;
  transform: translateY(-50%);
  z-index: 99;
  display: flex;
  flex-direction: column;
  gap: 1px;
}
.sidebar-contact .contact-item {
  width: 50px;
  height: 50px;
  background: #fff;
  border: 1px solid #e5e7eb;
  border-right: none;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  position: relative;
  transition: all 0.25s;
  border-radius: 0;
}
.sidebar-contact .contact-item:first-child { border-radius: 10px 0 0 0; }
.sidebar-contact .contact-item:last-child { border-radius: 0 0 0 10px; }
.sidebar-contact .contact-item:hover {
  background: #2563eb;
  color: #fff;
  border-color: #2563eb;
  width: 130px;
  border-radius: 10px 0 0 10px;
}
.sidebar-contact .contact-item .label { display: none; font-size: 13px; white-space: nowrap; font-weight: 500; }
.sidebar-contact .contact-item:hover .label { display: block; }
.sidebar-contact .contact-item:hover .icon-svg { display: none; }
.sidebar-contact .popup {
  position: absolute;
  right: 60px;
  top: 50%;
  transform: translateY(-50%);
  background: #fff;
  border: 1px solid #e5e7eb;
  border-radius: 12px;
  padding: 16px;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.15);
  display: none;
  white-space: nowrap;
  font-size: 14px;
  color: #374151;
}
.sidebar-contact .popup img { width: 140px; height: 140px; border-radius: 4px; }

/* ==========================================
   Responsive
   ========================================== */
@media (max-width: 768px) {
  .hero { padding: 80px 0 100px; }
  .hero h1 { font-size: 36px; }
  .hero p { font-size: 16px; }
  .hero-stats { gap: 32px; flex-wrap: wrap; }
  .hero-stats .stat-num { font-size: 28px; }
  .products-grid { grid-template-columns: 1fr; margin-top: -80px; }
  .products-section { padding: 60px 0; }
  .section-header h2 { font-size: 28px; }
  .features-grid { grid-template-columns: 1fr; }
  .cert-grid { grid-template-columns: repeat(2, 1fr); }
  .trust-bar-inner { gap: 40px; }
  .product-hero-inner { grid-template-columns: 1fr; gap: 40px; }
  .product-intro-grid { grid-template-columns: 1fr; }
  .feature-detail-grid { grid-template-columns: 1fr; }
  .testimonial-grid { grid-template-columns: 1fr; }
  .nav { display: none; }
  .intro-image { display: none; }
  .sidebar-contact { display: none; }
}
@media (max-width: 480px) {
  .container { padding: 0 20px; }
  .hero { padding: 56px 0 72px; }
  .hero h1 { font-size: 28px; }
  .product-card { padding: 32px 24px; }
  .product-card h2 { font-size: 22px; }
  .btn-lg { width: 100%; }
  .footer-inner { flex-direction: column; }
  .cert-grid { grid-template-columns: 1fr; }
  .footer-bottom { flex-direction: column; text-align: center; }
}

/* Utility */
.text-center { text-align: center; }
.mt-16 { margin-top: 16px; }
.mt-32 { margin-top: 32px; }
.mb-16 { margin-bottom: 16px; }
.mb-32 { margin-bottom: 32px; }