/* ========== LISN Tech Product Detail Shared Styles ========== */

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

:root {
  --primary-dark: #0a1628;
  --accent-electric: #00d4ff;
  --accent-tech: #1a8cff;
  --bg-light: #f5f7fa;
  --text-light: #ffffff;
  --text-muted: #e0e6ed;
  --text-dark: #1a2332;
  --text-secondary: #6b7a8d;
  --gradient-hero: linear-gradient(135deg, rgba(10,22,40,0.92) 0%, rgba(26,140,255,0.6) 100%);
}

html { scroll-behavior: smooth; }

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Noto Sans SC", "Microsoft YaHei", sans-serif;
  color: var(--text-dark);
  background: var(--text-light);
  line-height: 1.6;
}

/* ========== Navigation (same as homepage) ========== */
.navbar {
  position: fixed; top: 0; left: 0; width: 100%; z-index: 1000;
  display: flex; justify-content: space-between; align-items: center;
  padding: 0 60px; height: 70px;
  background: rgba(10,22,40,0.85);
  backdrop-filter: blur(12px);
  transition: background 0.3s;
}
.navbar.scrolled { background: rgba(10,22,40,0.98); }
.nav-logo {
  display: flex; align-items: center;
  text-decoration: none; height: 70px;
}
.nav-logo img { height: 84px; width: 84px; object-fit: contain; }
.nav-links { display: flex; gap: 36px; list-style: none; }
.nav-links a {
  color: var(--text-muted); text-decoration: none;
  font-size: 15px; font-weight: 500; letter-spacing: 0.5px;
  transition: color 0.3s;
}
.nav-links a:hover { color: var(--accent-electric); }
.nav-cta {
  padding: 8px 24px; border-radius: 6px;
  background: var(--accent-electric); color: var(--primary-dark);
  font-weight: 600; font-size: 14px; text-decoration: none;
  transition: transform 0.2s, box-shadow 0.2s;
}
.nav-cta:hover {
  transform: translateY(-1px);
  box-shadow: 0 4px 20px rgba(0,212,255,0.4);
}

/* ========== Breadcrumb ========== */
.breadcrumb {
  padding: 90px 60px 20px;
  background: var(--primary-dark);
}
.breadcrumb-inner {
  max-width: 1200px; margin: 0 auto;
  display: flex; align-items: center; gap: 8px;
  font-size: 14px; color: rgba(255,255,255,0.4);
}
.breadcrumb a {
  color: rgba(255,255,255,0.5); text-decoration: none;
  transition: color 0.3s;
}
.breadcrumb a:hover { color: var(--accent-electric); }
.breadcrumb .sep { margin: 0 4px; }
.breadcrumb .current { color: var(--accent-electric); }

/* ========== Product Hero ========== */
.product-hero {
  position: relative;
  background: var(--primary-dark);
  padding: 60px 60px 80px;
  overflow: hidden;
}
.product-hero::before {
  content: '';
  position: absolute; top: -40%; right: -10%;
  width: 600px; height: 600px;
  background: radial-gradient(circle, rgba(0,212,255,0.08) 0%, transparent 70%);
  pointer-events: none;
}
.product-hero-inner {
  position: relative; z-index: 1;
  max-width: 1200px; margin: 0 auto;
  display: flex; gap: 60px; align-items: center;
}
.product-hero-text { flex: 1; }
.product-hero-badge {
  display: inline-block; padding: 6px 16px;
  border: 1px solid rgba(0,212,255,0.4); border-radius: 20px;
  color: var(--accent-electric); font-size: 13px; font-weight: 500;
  margin-bottom: 20px; letter-spacing: 1px;
}
.product-hero h1 {
  font-size: 48px; font-weight: 700; color: var(--text-light);
  line-height: 1.2; margin-bottom: 12px;
}
.product-hero .en-name {
  color: rgba(255,255,255,0.3); font-size: 16px;
  letter-spacing: 1px; margin-bottom: 24px; font-weight: 400;
}
.product-hero-desc {
  font-size: 17px; color: var(--text-muted);
  line-height: 1.8; margin-bottom: 32px;
}
.product-hero-buttons { display: flex; gap: 16px; }
.btn-primary {
  padding: 14px 32px; border-radius: 8px;
  background: linear-gradient(135deg, var(--accent-electric), var(--accent-tech));
  color: var(--primary-dark); font-size: 16px; font-weight: 600;
  text-decoration: none; border: none; cursor: pointer;
  transition: transform 0.2s, box-shadow 0.3s;
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(0,212,255,0.35);
}
.btn-outline {
  padding: 14px 32px; border-radius: 8px;
  background: transparent;
  border: 1.5px solid rgba(255,255,255,0.3);
  color: var(--text-light); font-size: 16px; font-weight: 500;
  text-decoration: none; cursor: pointer;
  transition: border-color 0.3s, background 0.3s;
}
.btn-outline:hover {
  border-color: var(--accent-electric);
  background: rgba(0,212,255,0.08);
}

.product-hero-image {
  flex: 0 0 480px; height: 360px;
  border-radius: 16px; overflow: hidden;
  position: relative;
}
.product-hero-image img {
  width: 100%; height: 100%; object-fit: cover;
}
.product-hero-image::after {
  content: '';
  position: absolute; inset: 0;
  background: linear-gradient(135deg, rgba(0,212,255,0.1) 0%, transparent 60%);
  pointer-events: none;
}

/* ========== Section Common ========== */
.section { padding: 100px 60px; }
.section-dark {
  background: var(--primary-dark);
  color: var(--text-light);
}
.section-light { background: var(--bg-light); }
.section-white { background: var(--text-light); }

.section-header {
  text-align: center; max-width: 650px; margin: 0 auto 60px;
}
.section-header h2 {
  font-size: 36px; font-weight: 700; margin-bottom: 12px;
}
.section-header.light h2 { color: var(--text-light); }
.section-header p { color: var(--text-secondary); font-size: 16px; line-height: 1.7; }
.section-header.light p { color: rgba(255,255,255,0.5); }
.section-header .accent-line {
  width: 50px; height: 3px; margin: 16px auto 0;
  background: linear-gradient(90deg, var(--accent-electric), var(--accent-tech));
  border-radius: 2px;
}

/* ========== Features Grid ========== */
.features-grid {
  display: grid; grid-template-columns: repeat(3, 1fr);
  gap: 32px; max-width: 1200px; margin: 0 auto;
}
.feature-card {
  padding: 40px 32px;
  background: var(--text-light); border-radius: 16px;
  box-shadow: 0 4px 24px rgba(0,0,0,0.06);
  transition: transform 0.3s, box-shadow 0.3s;
  position: relative; overflow: hidden;
}
.feature-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 12px 40px rgba(0,0,0,0.12);
}
.feature-card::before {
  content: '';
  position: absolute; top: 0; left: 0; width: 100%; height: 3px;
  background: linear-gradient(90deg, var(--accent-electric), var(--accent-tech));
  opacity: 0; transition: opacity 0.3s;
}
.feature-card:hover::before { opacity: 1; }

.feature-icon {
  width: 56px; height: 56px; border-radius: 14px;
  background: linear-gradient(135deg, rgba(0,212,255,0.1), rgba(26,140,255,0.1));
  display: flex; align-items: center; justify-content: center;
  font-size: 26px; margin-bottom: 20px;
}
.feature-card h3 {
  font-size: 20px; font-weight: 600; color: var(--text-dark);
  margin-bottom: 10px;
}
.feature-card p {
  font-size: 15px; color: var(--text-secondary); line-height: 1.7;
}

/* ========== Specs Section ========== */
.specs-container {
  max-width: 1200px; margin: 0 auto;
  display: grid; grid-template-columns: 1fr 1fr; gap: 60px;
  align-items: start;
}
.specs-table {
  width: 100%; border-collapse: separate; border-spacing: 0;
  background: var(--text-light); border-radius: 12px;
  overflow: hidden; box-shadow: 0 2px 20px rgba(0,0,0,0.06);
}
.specs-table th, .specs-table td {
  padding: 16px 24px; text-align: left;
  border-bottom: 1px solid #edf0f5;
  font-size: 15px;
}
.specs-table th {
  color: var(--text-secondary); font-weight: 500; width: 40%;
  background: #fafbfd;
}
.specs-table td { color: var(--text-dark); font-weight: 500; }
.specs-table tr:last-child th,
.specs-table tr:last-child td { border-bottom: none; }

.specs-highlight {
  padding: 40px;
  background: linear-gradient(160deg, #0a1628, #101e35, #0d2a4a);
  border-radius: 16px; color: var(--text-light);
  position: relative; overflow: hidden;
}
.specs-highlight::before {
  content: '';
  position: absolute; top: -30%; right: -30%;
  width: 300px; height: 300px;
  background: radial-gradient(circle, rgba(0,212,255,0.08) 0%, transparent 70%);
  pointer-events: none;
}
.specs-highlight h3 {
  font-size: 22px; font-weight: 600; margin-bottom: 24px;
  position: relative; z-index: 1;
}
.spec-highlight-grid {
  display: grid; grid-template-columns: 1fr 1fr; gap: 24px;
  position: relative; z-index: 1;
}
.spec-highlight-item {
  text-align: center; padding: 20px;
  background: rgba(255,255,255,0.04);
  border-radius: 12px; border: 1px solid rgba(255,255,255,0.06);
}
.spec-highlight-item .number {
  font-size: 36px; font-weight: 700;
  background: linear-gradient(135deg, var(--accent-electric), var(--accent-tech));
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
  background-clip: text;
}
.spec-highlight-item .unit {
  font-size: 16px; font-weight: 400;
  -webkit-text-fill-color: rgba(255,255,255,0.5);
}
.spec-highlight-item .label {
  font-size: 13px; color: rgba(255,255,255,0.5);
  margin-top: 6px;
}

/* ========== Advantages ========== */
.advantages-grid {
  display: grid; grid-template-columns: repeat(2, 1fr);
  gap: 24px; max-width: 1200px; margin: 0 auto;
}
.advantage-card {
  display: flex; gap: 24px; padding: 32px;
  background: rgba(255,255,255,0.04);
  border: 1px solid rgba(255,255,255,0.06);
  border-radius: 14px;
  transition: background 0.3s, border-color 0.3s;
}
.advantage-card:hover {
  background: rgba(0,212,255,0.04);
  border-color: rgba(0,212,255,0.15);
}
.advantage-icon {
  flex: 0 0 48px; height: 48px; border-radius: 12px;
  background: linear-gradient(135deg, rgba(0,212,255,0.15), rgba(26,140,255,0.15));
  display: flex; align-items: center; justify-content: center;
  font-size: 22px;
}
.advantage-text h3 {
  font-size: 18px; font-weight: 600; color: var(--text-light);
  margin-bottom: 8px;
}
.advantage-text p {
  font-size: 14px; color: rgba(255,255,255,0.5); line-height: 1.7;
}

/* ========== Applications ========== */
.apps-grid {
  display: grid; grid-template-columns: repeat(4, 1fr);
  gap: 24px; max-width: 1200px; margin: 0 auto;
}
.app-card {
  position: relative; border-radius: 14px;
  height: 240px; overflow: hidden; cursor: pointer;
  transition: transform 0.3s, box-shadow 0.3s;
}
.app-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 30px rgba(0,0,0,0.15);
}
.app-card-bg {
  position: absolute; inset: 0;
  background-size: cover; background-position: center;
  transition: transform 0.5s;
}
.app-card:hover .app-card-bg { transform: scale(1.05); }
.app-card-bg::after {
  content: ''; position: absolute; inset: 0;
  background: linear-gradient(180deg, rgba(0,0,0,0.1) 0%, rgba(10,22,40,0.8) 100%);
}
.app-card-content {
  position: relative; z-index: 1;
  height: 100%; display: flex; flex-direction: column;
  justify-content: flex-end; padding: 24px;
}
.app-card-tag {
  display: inline-block; padding: 3px 10px; border-radius: 4px;
  font-size: 11px; font-weight: 600; letter-spacing: 1px;
  margin-bottom: 8px; width: fit-content;
}
.app-tag-3c { background: rgba(0,212,255,0.2); color: var(--accent-electric); }
.app-tag-auto { background: rgba(26,140,255,0.2); color: var(--accent-tech); }
.app-tag-energy { background: rgba(0,200,100,0.2); color: #00c864; }
.app-tag-semi { background: rgba(160,120,255,0.2); color: #a078ff; }
.app-tag-logistics { background: rgba(255,160,60,0.2); color: #ffa03c; }
.app-tag-food { background: rgba(100,200,60,0.2); color: #64c83c; }
.app-tag-pharma { background: rgba(200,60,180,0.2); color: #c83cb4; }
.app-tag-packaging { background: rgba(60,180,200,0.2); color: #3cb4c8; }

.app-card-content h3 {
  color: var(--text-light); font-size: 18px; font-weight: 600;
}
.app-card-content p {
  color: rgba(255,255,255,0.6); font-size: 13px;
  margin-top: 4px; line-height: 1.5;
}

/* ========== CTA Banner ========== */
.cta-banner {
  padding: 100px 60px;
  background: linear-gradient(135deg, #0a1628 0%, #0d2a4a 50%, #0a1628 100%);
  text-align: center; position: relative; overflow: hidden;
}
.cta-banner::before {
  content: '';
  position: absolute; top: -50%; left: -50%;
  width: 200%; height: 200%;
  background: radial-gradient(circle at 50% 50%, rgba(0,212,255,0.06), transparent 60%);
  animation: ctaPulse 8s ease-in-out infinite;
}
@keyframes ctaPulse {
  0%, 100% { transform: scale(1); opacity: 0.5; }
  50% { transform: scale(1.1); opacity: 1; }
}
.cta-banner-content { position: relative; z-index: 1; }
.cta-banner h2 {
  font-size: 36px; font-weight: 700; color: var(--text-light);
  margin-bottom: 16px;
}
.cta-banner p {
  color: var(--text-muted); font-size: 18px;
  margin-bottom: 32px; max-width: 500px; margin-left: auto; margin-right: auto;
}

/* ========== Back to Products ========== */
.back-link {
  display: inline-flex; align-items: center; gap: 8px;
  color: rgba(255,255,255,0.5); font-size: 14px;
  text-decoration: none; margin-bottom: 24px;
  transition: color 0.3s;
}
.back-link:hover { color: var(--accent-electric); }

/* ========== Footer (same as homepage) ========== */
.footer {
  padding: 60px; background: var(--primary-dark);
  color: var(--text-muted);
}
.footer-content {
  max-width: 1200px; margin: 0 auto;
  display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 40px;
}
.footer-brand { display: flex; flex-direction: column; align-items: flex-start; }
.footer-brand img.footer-logo {
  height: 64px; width: 64px; object-fit: contain; margin-bottom: 12px;
}
.footer-brand p { font-size: 14px; line-height: 1.7; }
.footer-col h4 {
  color: var(--text-light); font-size: 15px;
  margin-bottom: 16px; font-weight: 600;
}
.footer-col ul { list-style: none; }
.footer-col li { margin-bottom: 8px; }
.footer-col a {
  color: var(--text-muted); text-decoration: none;
  font-size: 14px; transition: color 0.3s;
}
.footer-col a:hover { color: var(--accent-electric); }
.footer-bottom {
  max-width: 1200px; margin: 40px auto 0;
  padding-top: 24px; border-top: 1px solid rgba(255,255,255,0.08);
  display: flex; justify-content: center; gap: 24px; flex-wrap: wrap;
  font-size: 13px;
}
.footer-bottom a {
  color: var(--text-muted); text-decoration: none; transition: color 0.3s;
}
.footer-bottom a:hover { color: var(--accent-electric); }

/* ========== Responsive ========== */
@media (max-width: 1024px) {
  .product-hero-inner { flex-direction: column; gap: 40px; }
  .product-hero-image { flex: auto; width: 100%; height: 300px; }
  .product-hero h1 { font-size: 36px; }
  .features-grid { grid-template-columns: repeat(2, 1fr); }
  .specs-container { grid-template-columns: 1fr; }
  .apps-grid { grid-template-columns: repeat(2, 1fr); }
  .advantages-grid { grid-template-columns: 1fr; }
  .footer-content { grid-template-columns: 1fr 1fr; }
  .product-hero, .section { padding: 60px 30px; }
}

/* ========== Solution Hero (full-width image) ========== */
.solution-hero {
  position: relative;
  height: 520px;
  display: flex; align-items: center;
  overflow: hidden;
}
.solution-hero-bg {
  position: absolute; inset: 0;
  background-size: cover; background-position: center;
}
.solution-hero-bg::after {
  content: ''; position: absolute; inset: 0;
  background: linear-gradient(135deg, rgba(10,22,40,0.88) 0%, rgba(10,22,40,0.6) 50%, rgba(26,140,255,0.3) 100%);
}
.solution-hero-content {
  position: relative; z-index: 2;
  max-width: 1200px; margin: 0 auto; padding: 0 60px;
  width: 100%;
}
.solution-hero .tag {
  display: inline-block; padding: 5px 14px; border-radius: 4px;
  font-size: 13px; font-weight: 600; letter-spacing: 1px;
  margin-bottom: 16px;
}
.tag-energy { background: rgba(0,200,100,0.2); color: #00c864; }
.tag-semi { background: rgba(160,120,255,0.2); color: #a078ff; }
.solution-hero h1 {
  font-size: 48px; font-weight: 700; color: var(--text-light);
  line-height: 1.2; margin-bottom: 8px;
}
.solution-hero .en-name {
  color: rgba(255,255,255,0.35); font-size: 16px;
  letter-spacing: 1px; margin-bottom: 20px;
}
.solution-hero-desc {
  font-size: 17px; color: var(--text-muted);
  line-height: 1.8; max-width: 600px; margin-bottom: 28px;
}
.solution-hero-buttons { display: flex; gap: 16px; }

/* ========== Challenge Section ========== */
.challenges-grid {
  display: grid; grid-template-columns: repeat(3, 1fr);
  gap: 24px; max-width: 1200px; margin: 0 auto;
}
.challenge-card {
  padding: 32px; border-radius: 14px;
  background: var(--text-light);
  border-left: 4px solid #ff6b4a;
  box-shadow: 0 2px 16px rgba(0,0,0,0.05);
  transition: transform 0.3s;
}
.challenge-card:hover { transform: translateY(-4px); }
.challenge-card h3 {
  font-size: 17px; font-weight: 600; color: var(--text-dark);
  margin-bottom: 10px;
}
.challenge-card p {
  font-size: 14px; color: var(--text-secondary); line-height: 1.7;
}
.challenge-card .challenge-icon {
  font-size: 28px; margin-bottom: 12px;
}

/* ========== Process Steps ========== */
.process-steps {
  display: flex; gap: 0; max-width: 1200px; margin: 0 auto;
  position: relative;
}
.process-steps::before {
  content: ''; position: absolute;
  top: 36px; left: 60px; right: 60px;
  height: 3px;
  background: linear-gradient(90deg, var(--accent-electric), var(--accent-tech));
  opacity: 0.3;
}
.process-step {
  flex: 1; text-align: center; padding: 0 20px;
  position: relative;
}
.step-number {
  width: 72px; height: 72px; border-radius: 50%;
  background: linear-gradient(135deg, var(--accent-electric), var(--accent-tech));
  color: var(--primary-dark);
  font-size: 24px; font-weight: 700;
  display: inline-flex; align-items: center; justify-content: center;
  margin-bottom: 16px; position: relative; z-index: 1;
}
.process-step h3 {
  font-size: 18px; font-weight: 600; color: var(--text-dark);
  margin-bottom: 8px;
}
.process-step p {
  font-size: 14px; color: var(--text-secondary); line-height: 1.6;
}

/* ========== Related Products ========== */
.related-products {
  display: grid; grid-template-columns: repeat(3, 1fr);
  gap: 24px; max-width: 1200px; margin: 0 auto;
}
.related-product-card {
  border-radius: 14px; overflow: hidden;
  background: var(--text-light);
  box-shadow: 0 2px 16px rgba(0,0,0,0.06);
  transition: transform 0.3s, box-shadow 0.3s;
  text-decoration: none; color: inherit;
}
.related-product-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 12px 36px rgba(0,0,0,0.12);
}
.related-product-img {
  height: 200px; background-size: cover; background-position: center;
  position: relative;
}
.related-product-img::after {
  content: ''; position: absolute; inset: 0;
  background: linear-gradient(180deg, rgba(10,22,40,0) 40%, rgba(10,22,40,0.6) 100%);
}
.related-product-info {
  padding: 20px 24px;
}
.related-product-info h3 {
  font-size: 18px; font-weight: 600; color: var(--text-dark);
  margin-bottom: 6px;
}
.related-product-info p {
  font-size: 14px; color: var(--text-secondary); line-height: 1.5;
}
.related-product-link {
  display: inline-flex; align-items: center; gap: 4px;
  color: var(--accent-tech); font-size: 13px; font-weight: 500;
  margin-top: 8px; text-decoration: none;
  transition: color 0.3s;
}
.related-product-link:hover { color: var(--accent-electric); }

/* ========== Results Grid ========== */
.results-grid {
  display: grid; grid-template-columns: repeat(4, 1fr);
  gap: 24px; max-width: 1200px; margin: 0 auto;
}
.result-card {
  text-align: center; padding: 36px 20px;
  border-radius: 14px;
  background: rgba(255,255,255,0.04);
  border: 1px solid rgba(255,255,255,0.06);
}
.result-card .number {
  font-size: 42px; font-weight: 700;
  background: linear-gradient(135deg, var(--accent-electric), var(--accent-tech));
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
  background-clip: text;
}
.result-card .unit {
  font-size: 18px; -webkit-text-fill-color: rgba(255,255,255,0.5);
}
.result-card .label {
  font-size: 14px; color: rgba(255,255,255,0.5);
  margin-top: 8px;
}

/* ========== Sustainability Content Page ========== */
.sustain-hero {
  position: relative;
  padding: 80px 60px 100px;
  background: linear-gradient(160deg, #0a1628 0%, #101e35 40%, #0d2a4a 100%);
  overflow: hidden;
}
.sustain-hero::before {
  content: '';
  position: absolute; top: -30%; right: -10%;
  width: 500px; height: 500px;
  background: radial-gradient(circle, rgba(94,75,219,0.1) 0%, transparent 70%);
  pointer-events: none;
}
.sustain-hero-inner {
  position: relative; z-index: 1;
  max-width: 1200px; margin: 0 auto;
}
.sustain-hero h1 {
  font-size: 48px; font-weight: 700; color: var(--text-light);
  margin-bottom: 8px;
}
.sustain-hero .en-name {
  color: rgba(255,255,255,0.3); font-size: 16px;
  letter-spacing: 1px; margin-bottom: 24px;
}
.sustain-hero-desc {
  font-size: 18px; color: var(--text-muted);
  line-height: 1.8; max-width: 700px;
}

/* ========== Content Blocks ========== */
.content-blocks {
  max-width: 900px; margin: 0 auto;
}
.content-block {
  margin-bottom: 48px;
}
.content-block h3 {
  font-size: 24px; font-weight: 600; color: var(--text-dark);
  margin-bottom: 16px; position: relative; padding-left: 20px;
}
.content-block h3::before {
  content: '';
  position: absolute; left: 0; top: 4px;
  width: 4px; height: 28px; border-radius: 2px;
  background: linear-gradient(180deg, var(--accent-electric), var(--accent-tech));
}
.content-block.dark h3 { color: var(--text-light); }
.content-block p {
  font-size: 16px; line-height: 1.9; color: var(--text-secondary);
  margin-bottom: 12px;
}
.content-block.dark p { color: rgba(255,255,255,0.6); }
.content-block ul {
  list-style: none; padding: 0; margin-top: 12px;
}
.content-block li {
  padding: 10px 0 10px 28px;
  font-size: 15px; line-height: 1.7;
  color: var(--text-secondary);
  position: relative;
}
.content-block.dark li { color: rgba(255,255,255,0.55); }
.content-block li::before {
  content: '▸';
  position: absolute; left: 4px; top: 10px;
  color: var(--accent-tech); font-size: 14px;
}

/* ========== Stats Bar ========== */
.stats-bar {
  display: grid; grid-template-columns: repeat(3, 1fr);
  gap: 32px; max-width: 900px; margin: 0 auto 60px;
}
.stat-item { text-align: center; }
.stat-item .number {
  font-size: 48px; font-weight: 700;
  background: linear-gradient(135deg, var(--accent-electric), var(--accent-tech));
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
  background-clip: text;
}
.stat-item .unit {
  font-size: 20px; -webkit-text-fill-color: rgba(255,255,255,0.5);
}
.stat-item .label {
  font-size: 14px; color: rgba(255,255,255,0.5);
  margin-top: 6px;
}

/* ========== Responsive Additions ========== */
@media (max-width: 1024px) {
  .solution-hero { height: 420px; }
  .solution-hero h1 { font-size: 36px; }
  .challenges-grid { grid-template-columns: repeat(2, 1fr); }
  .process-steps { flex-wrap: wrap; gap: 24px; }
  .process-steps::before { display: none; }
  .process-step { flex: 0 0 calc(50% - 12px); }
  .related-products { grid-template-columns: repeat(2, 1fr); }
  .results-grid { grid-template-columns: repeat(2, 1fr); }
  .sustain-hero { padding: 60px 30px 80px; }
  .sustain-hero h1 { font-size: 36px; }
  .stats-bar { grid-template-columns: repeat(3, 1fr); gap: 20px; }
}

@media (max-width: 768px) {
  .navbar { padding: 0 24px; }
  .nav-links { display: none; }
  .breadcrumb { padding: 80px 24px 12px; }
  .product-hero { padding: 30px 24px 50px; }
  .product-hero h1 { font-size: 28px; }
  .section { padding: 50px 24px; }
  .features-grid { grid-template-columns: 1fr; }
  .apps-grid { grid-template-columns: 1fr; }
  .app-card { height: 200px; }
  .advantages-grid { grid-template-columns: 1fr; }
  .product-hero-buttons { flex-direction: column; }
  .spec-highlight-grid { grid-template-columns: 1fr 1fr; }
  .footer-content { grid-template-columns: 1fr; }
  .footer-bottom { flex-direction: column; gap: 8px; text-align: center; }
  .solution-hero { height: auto; min-height: 360px; padding-top: 40px; padding-bottom: 40px; }
  .solution-hero h1 { font-size: 28px; }
  .solution-hero-content { padding: 0 24px; }
  .challenges-grid { grid-template-columns: 1fr; }
  .process-step { flex: 0 0 100%; }
  .related-products { grid-template-columns: 1fr; }
  .results-grid { grid-template-columns: repeat(2, 1fr); }
  .sustain-hero { padding: 40px 24px 60px; }
  .sustain-hero h1 { font-size: 28px; }
  .stats-bar { grid-template-columns: 1fr; gap: 16px; }
}