/* ========================================
   DARWIN - Heating System & Products Manufacturer
   Bright / Light Business Theme
   ======================================== */

/* --- Reset & Base --- */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; font-size: 16px; }
body {
  font-family: 'Segoe UI', 'Helvetica Neue', Arial, sans-serif;
  background: #ffffff;
  color: #333333;
  line-height: 1.7;
  overflow-x: hidden;
  padding-bottom: 80px;
}
a { text-decoration: none; color: inherit; }
ul, ol { list-style: none; }
img { max-width: 100%; height: auto; display: block; }
.container { max-width: 1280px; margin: 0 auto; padding: 0 20px; }

/* --- Color Palette --- */
:root {
  --bg:         #ffffff;
  --bg-light:   #f5f5f5;
  --bg-warm:    #f8f9fa;
  --card-bg:    #ffffff;
  --card-hover: #f0f4f8;
  --red:        #c0392b;
  --red-hover:  #e74c3c;
  --red-dark:   #a93226;
  --blue:       #2563eb;
  --blue-hover: #1d4ed8;
  --white:      #ffffff;
  --text:       #333333;
  --text-dark:  #222222;
  --text-mid:   #555555;
  --text-light: #888888;
  --border:     #e0e0e0;
  --shadow-sm:  0 2px 8px rgba(0,0,0,0.06);
  --shadow-md:  0 4px 16px rgba(0,0,0,0.08);
  --shadow-lg:  0 8px 30px rgba(0,0,0,0.10);
  --footer-bg:  #1a1a2e;
}

/* --- Buttons --- */
.btn {
  display: inline-block;
  padding: 12px 32px;
  font-size: 0.95rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  cursor: pointer;
  transition: all 0.3s ease;
  border: none;
  border-radius: 4px;
}
.btn-primary {
  background: var(--red);
  color: var(--white);
}
.btn-primary:hover { background: var(--red-hover); }
.btn-outline {
  background: transparent;
  color: var(--white);
  border: 2px solid var(--white);
}
.btn-outline:hover { background: var(--white); color: var(--text-dark); }
.btn-sm { padding: 8px 20px; font-size: 0.85rem; }

/* ========================================
   NAVIGATION
   ======================================== */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  background: rgba(255,255,255,0.97);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
  box-shadow: 0 1px 4px rgba(0,0,0,0.04);
  transition: all 0.3s ease;
}
.navbar .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 70px;
}
.nav-logo { height: 45px; }
.nav-logo img { height: 100%; width: auto; }
.nav-menu { display: flex; align-items: center; gap: 2px; }
.nav-menu li a {
  display: block;
  padding: 10px 16px;
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.5px;
  color: var(--text-mid);
  transition: color 0.3s ease;
}
.nav-menu li a:hover,
.nav-menu li a.active { color: var(--red); }
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  background: none;
  border: none;
  padding: 5px;
}
.nav-toggle span {
  display: block;
  width: 25px;
  height: 2px;
  background: var(--text-dark);
  transition: all 0.3s ease;
}

/* ========================================
   HERO SECTION
   ======================================== */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: flex-start;
  text-align: left;
  overflow: hidden;
  padding-top: 70px;
}
.hero-bg {
  position: absolute;
  inset: 0;
  background: url('../images/hero-bg.png') center/cover no-repeat;
  filter: brightness(0.55);
  z-index: 0;
}
.hero-overlay {
  position: absolute;
  inset: 0;
  background: rgba(0,0,0,0.45);
  z-index: 1;
}
.hero-content { position: relative; z-index: 2; max-width: 1000px; padding: 0 60px 0 250px; }
.hero-content h1 {
  font-size: clamp(1.6rem, 4vw, 3rem);
  font-weight: 700;
  color: var(--white);
  text-shadow: 0 2px 12px rgba(0,0,0,0.5);
  margin-bottom: 16px;
  text-transform: uppercase;
  letter-spacing: 2px;
}
.hero-content h1 span { color: var(--red); }
.hero-content .hero-subtitle {
  font-size: 1.1rem;
  color: rgba(255,255,255,0.9);
  margin-bottom: 32px;
  letter-spacing: 1px;
}
.hero-content .btn-group { display: flex; flex-direction: row; gap: 12px; flex-wrap: wrap; }
.hero-content .btn { margin: 0; }

/* ========================================
   SECTION COMMON
   ======================================== */
.section {
  padding: 100px 0;
  position: relative;
}
.section-light { background: var(--bg-warm); }
.section-dark { background: var(--bg-light); }
.section-title {
  font-size: 2.2rem;
  font-weight: 700;
  color: var(--text-dark);
  text-align: left;
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: 12px;
}
.section-subtitle {
  text-align: left;
  color: var(--text-mid);
  font-size: 1rem;
  margin-bottom: 60px;
}
.section-divider {
  width: 60px;
  height: 3px;
  background: var(--red);
  margin: 0 0 40px;
}

/* ========================================
   ABOUT SECTION
   ======================================== */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}
.about-image img {
  border-radius: 4px;
  box-shadow: var(--shadow-md);
}
.about-content h3 {
  font-size: 1.5rem;
  color: var(--text-dark);
  margin-bottom: 20px;
}
.about-content p {
  color: var(--text-mid);
  margin-bottom: 16px;
  font-size: 0.95rem;
}
.about-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  margin-top: 30px;
}
.stat-item {
  text-align: center;
  padding: 20px;
  background: var(--card-bg);
  border-radius: 4px;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border);
}
.stat-number {
  font-size: 2rem;
  font-weight: 700;
  color: var(--red);
}
.stat-label {
  font-size: 0.85rem;
  color: var(--text-mid);
  margin-top: 6px;
}

/* ========================================
   HEATING SYSTEM SECTION
   ======================================== */
.hs-intro {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 50px;
  align-items: center;
  margin-bottom: 60px;
}
.hs-intro-text h3 {
  font-size: 1.6rem;
  color: var(--text-dark);
  margin-bottom: 16px;
}
.hs-intro-text p {
  color: var(--text-mid);
  margin-bottom: 12px;
  font-size: 0.95rem;
}
.hs-features {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  margin-bottom: 60px;
}
.feature-card {
  background: var(--card-bg);
  padding: 30px 24px;
  border-radius: 6px;
  text-align: center;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
  border: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
}
.feature-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: var(--red);
}
.feature-icon {
  width: 60px;
  height: 60px;
  margin: 0 auto 16px;
  background: rgba(192,57,43,0.08);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
}
.feature-card h4 {
  font-size: 1rem;
  color: var(--text-dark);
  margin-bottom: 10px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}
.feature-card p {
  font-size: 0.88rem;
  color: var(--text-mid);
  line-height: 1.6;
}
.custom-options {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 20px;
  margin-bottom: 50px;
}
.option-item {
  background: var(--card-bg);
  padding: 24px 16px;
  border-radius: 6px;
  text-align: center;
  transition: all 0.3s ease;
  border: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
}
.option-item:hover {
  box-shadow: var(--shadow-md);
  border-color: var(--red);
}
.option-icon {
  font-size: 1.8rem;
  margin-bottom: 10px;
}
.option-item h5 {
  font-size: 0.9rem;
  color: var(--text-dark);
  text-transform: uppercase;
}
.rd-section {
  background: var(--bg-warm);
  padding: 40px;
  border-radius: 6px;
  margin-bottom: 40px;
  border-left: 4px solid var(--red);
  box-shadow: var(--shadow-sm);
}
.rd-section h3 {
  font-size: 1.3rem;
  color: var(--text-dark);
  margin-bottom: 12px;
}
.rd-section p { color: var(--text-mid); font-size: 0.95rem; }
.applications-grid {
  display: grid;
  grid-template-columns: repeat(8, 1fr);
  gap: 16px;
  margin-bottom: 50px;
}
.app-item {
  background: var(--card-bg);
  padding: 20px 10px;
  border-radius: 6px;
  text-align: center;
  font-size: 0.82rem;
  color: var(--text-mid);
  text-transform: uppercase;
  font-weight: 600;
  transition: all 0.3s ease;
  border: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
}
.app-item:hover {
  border-color: var(--red);
  color: var(--red);
  box-shadow: var(--shadow-md);
}

/* ========================================
   PRODUCTS SECTION
   ======================================== */
.product-categories {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 24px;
  margin-bottom: 40px;
}
.pcat-card {
  background: var(--card-bg);
  padding: 30px 20px;
  border-radius: 6px;
  text-align: center;
  transition: all 0.3s ease;
  border: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
}
.pcat-card:hover {
  box-shadow: var(--shadow-md);
  border-color: var(--red);
  transform: translateY(-4px);
}
.pcat-icon { font-size: 2.2rem; margin-bottom: 12px; }
.pcat-card h4 {
  font-size: 0.9rem;
  color: var(--text-dark);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}
.pcat-sub-items {
  margin-top: 8px;
  font-size: 0.78rem;
  color: var(--text-light);
  line-height: 1.8;
}
.product-showcase {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 20px;
  margin-bottom: 40px;
}
.product-card {
  background: var(--card-bg);
  border-radius: 6px;
  overflow: hidden;
  transition: all 0.3s ease;
  border: 1px solid var(--border);
}
.product-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}
.product-card img {
  width: 100%;
  aspect-ratio: 1;
  object-fit: cover;
}
.product-card .p-info {
  padding: 12px;
  text-align: center;
  font-size: 0.85rem;
  color: var(--text-mid);
}
.text-center { text-align: center; }
.mt-40 { margin-top: 40px; }

/* ========================================
   CERTIFICATIONS SECTION
   ======================================== */
.cert-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 24px;
}
.cert-card {
  background: var(--card-bg);
  border-radius: 6px;
  overflow: hidden;
  transition: all 0.3s ease;
  border: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
}
.cert-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}
.cert-card img {
  width: 100%;
  aspect-ratio: 3/4;
  object-fit: contain;
  background: #f9f9f9;
  padding: 10px;
}
.cert-card .cert-label {
  padding: 12px;
  text-align: center;
  font-size: 0.85rem;
  color: var(--text-dark);
  font-weight: 600;
}

/* ========================================
   NEWS SECTION
   ======================================== */
.news-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}
.news-card {
  background: var(--card-bg);
  border-radius: 6px;
  overflow: hidden;
  transition: all 0.3s ease;
  border: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
}
.news-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}
.news-img {
  width: 100%;
  aspect-ratio: 16/10;
  background: #e8eaed;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-light);
  font-size: 0.85rem;
}
.news-body { padding: 20px; }
.news-date {
  font-size: 0.8rem;
  color: var(--red);
  margin-bottom: 8px;
}
.news-body h4 {
  font-size: 1.05rem;
  color: var(--text-dark);
  margin-bottom: 10px;
}
.news-body p {
  font-size: 0.88rem;
  color: var(--text-mid);
  margin-bottom: 14px;
}
.news-body .read-more {
  font-size: 0.85rem;
  color: var(--red);
  font-weight: 600;
  transition: color 0.3s ease;
}
.news-body .read-more:hover { color: var(--red-hover); }

/* ========================================
   CONTACT SECTION
   ======================================== */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 50px;
}
.contact-info h4 {
  font-size: 1.2rem;
  color: var(--text-dark);
  margin-bottom: 24px;
}
.contact-info .info-item {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  margin-bottom: 20px;
  color: var(--text-mid);
  font-size: 0.95rem;
}
.info-icon {
  width: 40px;
  height: 40px;
  background: rgba(192,57,43,0.08);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  font-size: 1rem;
}
.contact-form {
  background: var(--card-bg);
  padding: 36px;
  border-radius: 6px;
  border: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
}
.contact-form h4 {
  font-size: 1.2rem;
  color: var(--text-dark);
  margin-bottom: 24px;
}
.form-group { margin-bottom: 16px; }
.form-group label {
  display: block;
  font-size: 0.85rem;
  color: var(--text-mid);
  margin-bottom: 6px;
}
.form-group input,
.form-group textarea {
  width: 100%;
  padding: 12px 16px;
  background: var(--bg-warm);
  border: 1px solid var(--border);
  border-radius: 4px;
  color: var(--text-dark);
  font-size: 0.9rem;
  font-family: inherit;
  transition: border-color 0.3s ease;
}
.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--red);
}
.form-group textarea { resize: vertical; min-height: 120px; }

/* ========================================
   FOOTER
   ======================================== */
.footer {
  background: var(--footer-bg);
  padding: 40px 0;
  text-align: center;
  color: #cccccc;
}
.footer-contact {
  display: flex;
  justify-content: center;
  gap: 40px;
  flex-wrap: wrap;
  margin-bottom: 24px;
}
.footer-contact-item {
  display: flex;
  align-items: center;
  gap: 8px;
  color: #cccccc;
  font-size: 0.9rem;
}
.fc-icon { font-size: 1rem; }
.footer p { font-size: 0.85rem; color: #aaaaaa; }

/* ========================================
   PAGE HERO (INNER PAGES)
   ======================================== */
.page-hero {
  position: relative;
  min-height: 45vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  overflow: hidden;
  padding-top: 70px;
  background: var(--footer-bg);
}
.page-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(192,57,43,0.08) 0%, rgba(26,26,46,0.85) 100%);
  z-index: 1;
}
.page-hero .hero-bg { position: absolute; inset: 0; z-index: 0; }
.page-hero .hero-content { z-index: 2;  padding: 0 60px}
.page-hero .hero-content h1 {
  font-size: 2.6rem;
  color: var(--white);
  text-shadow: 0 2px 8px rgba(0,0,0,0.3);
}
.page-hero .hero-content .hero-subtitle { color: rgba(255,255,255,0.85); }

/* ========================================
   PRODUCTS PAGE
   ======================================== */
.products-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}
.product-item {
  background: var(--card-bg);
  border-radius: 6px;
  overflow: hidden;
  transition: all 0.3s ease;
  border: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
}
.product-item:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: var(--red);
}
.product-item .p-img {
  width: 100%;
  aspect-ratio: 1;
  background: #f0f4f8;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-light);
  font-size: 0.85rem;
}
.product-item .p-name {
  padding: 16px;
  text-align: center;
  font-size: 0.95rem;
  color: var(--text-dark);
  font-weight: 600;
}
.pagination {
  display: flex;
  justify-content: center;
  gap: 8px;
  margin-top: 40px;
}
.pagination a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  background: var(--card-bg);
  border-radius: 4px;
  font-size: 0.9rem;
  color: var(--text-mid);
  transition: all 0.3s ease;
  border: 1px solid var(--border);
}
.pagination a:hover,
.pagination a.active { background: var(--red); color: var(--white); border-color: var(--red); }

/* ========================================
   CATEGORY FILTER BAR
   ======================================== */
.cat-filter {
  display: flex;
  justify-content: center;
  gap: 10px;
  flex-wrap: wrap;
  margin-bottom: 30px;
}
.cat-btn {
  background: var(--card-bg);
  color: var(--text-mid);
  border: 1px solid var(--border);
  padding: 10px 22px;
  border-radius: 4px;
  font-size: 0.88rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s ease;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}
.cat-btn:hover {
  border-color: var(--red);
  color: var(--red);
}
.cat-btn.active {
  background: var(--red);
  color: var(--white);
  border-color: var(--red);
}

/* ========================================
   HEATING SYSTEM PAGE (Detailed)
   ======================================== */
.hs-page-content { padding: 80px 0; }
.hs-detail-block { margin-bottom: 60px; }
.hs-detail-block h2 {
  font-size: 1.8rem;
  color: var(--text-dark);
  margin-bottom: 24px;
  text-transform: uppercase;
  letter-spacing: 1px;
}
.hs-detail-block p {
  color: var(--text-mid);
  font-size: 0.95rem;
  margin-bottom: 16px;
  max-width: 900px;
}
.hs-sub-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin: 30px 0;
}
.hs-sub-card {
  background: var(--card-bg);
  padding: 24px;
  border-radius: 6px;
  border-left: 3px solid var(--red);
  box-shadow: var(--shadow-sm);
}
.hs-sub-card h5 { font-size: 0.95rem; color: var(--text-dark); margin-bottom: 8px; }
.hs-sub-card p { font-size: 0.85rem; color: var(--text-mid); }
.process-flow {
  text-align: center;
  padding: 30px;
  background: var(--bg-warm);
  border-radius: 6px;
  border: 1px solid var(--border);
}
.process-flow .flow-steps {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
  margin-top: 20px;
}
.flow-step {
  background: var(--red);
  color: var(--white);
  padding: 10px 18px;
  border-radius: 4px;
  font-size: 0.85rem;
  font-weight: 600;
  white-space: nowrap;
}
.flow-arrow { color: var(--red); font-size: 1.2rem; }

/* ========================================
   NEWS ARTICLE (Inner Page)
   ======================================== */
.news-article-content {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 40px;
  align-items: start;
}
.news-body-text {
  font-size: 0.95rem;
  color: var(--text-mid);
  line-height: 1.9;
}
.news-body-text p { margin-bottom: 20px; }
.news-body-text h3 {
  font-size: 1.3rem;
  color: var(--text-dark);
  margin: 30px 0 14px;
}
.news-body-text img {
  width: 100%;
  border-radius: 6px;
  margin: 20px 0;
}
.news-sidebar {
  background: var(--bg-warm);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 28px;
  position: sticky;
  top: 90px;
}
.news-sidebar h4 {
  font-size: 1.05rem;
  color: var(--text-dark);
  margin-bottom: 16px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}
.news-sidebar .related-item {
  display: block;
  padding: 10px 0;
  border-bottom: 1px solid var(--border);
  font-size: 0.88rem;
  color: var(--text-mid);
  transition: color 0.3s;
}
.news-sidebar .related-item:hover { color: var(--red); }
.news-sidebar .related-item:last-child { border-bottom: none; }
.news-sidebar .specs-table {
  width: 100%;
  border-collapse: collapse;
}
.news-sidebar .specs-table td {
  padding: 5px 0;
  vertical-align: top;
  font-size: 0.85rem;
  color: var(--text-mid);
  line-height: 1.7;
}
.news-sidebar .specs-table td:first-child {
  font-weight: 600;
  color: var(--text-dark);
  white-space: nowrap;
  padding-right: 10px;
 
}
.news-sidebar .specs-table td:last-child br {
  display: block;
  content: '';
  margin-top: 3px;
}
.news-date-hero {
  font-size: 0.9rem;
  color: rgba(255,255,255,0.8);
  margin-top: 8px;
}
@media (max-width: 768px) {
  .news-article-content { grid-template-columns: 1fr; }
}

/* ========================================
   PLACEHOLDER IMAGES
   ======================================== */
.img-placeholder {
  background: #f0f4f8;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-light);
  font-size: 0.85rem;
  text-align: center;
  padding: 20px;
  aspect-ratio: 1;
  border-radius: 4px;
  border: 1px dashed var(--border);
}
.img-placeholder-wide { aspect-ratio: 16/9; }
.img-placeholder-tall { aspect-ratio: 3/4; }

/* ========================================
   RESPONSIVE
   ======================================== */
@media (max-width: 1024px) {
  .hero-content h1 { font-size: 2.2rem; }
  .about-grid,
  .hs-intro,
  .contact-grid { grid-template-columns: 1fr; }
  .hs-features { grid-template-columns: repeat(2, 1fr); }
  .custom-options { grid-template-columns: repeat(3, 1fr); }
  .applications-grid { grid-template-columns: repeat(4, 1fr); }
  .product-categories { grid-template-columns: repeat(3, 1fr); }
  .product-showcase { grid-template-columns: repeat(3, 1fr); }
  .cert-grid { grid-template-columns: repeat(3, 1fr); }
  .products-grid { grid-template-columns: repeat(2, 1fr); }
  .about-stats { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 768px) {
  .nav-menu {
    position: fixed;
    top: 70px;
    left: 0;
    width: 100%;
    background: rgba(255,255,255,0.99);
    flex-direction: column;
    padding: 20px;
    display: none;
    border-bottom: 1px solid var(--border);
    box-shadow: 0 4px 12px rgba(0,0,0,0.08);
  }
  .nav-menu.active { display: flex; }
  .nav-toggle { display: flex; }
  .nav-toggle span { background: var(--text-dark); }
  .hero { text-align: center; }
  .hero-content { padding: 0 16px; }
  .section { padding: 60px 0; }
  .section-title { font-size: 1.6rem; }
  .hs-features { grid-template-columns: 1fr; }
  .custom-options { grid-template-columns: repeat(2, 1fr); }
  .applications-grid { grid-template-columns: repeat(2, 1fr); }
  .product-categories { grid-template-columns: repeat(2, 1fr); }
  .product-showcase { grid-template-columns: repeat(2, 1fr); }
  .news-grid { grid-template-columns: 1fr; }
  .cert-grid { grid-template-columns: repeat(2, 1fr); }
  .products-grid { grid-template-columns: 1fr; }
  .about-stats { grid-template-columns: repeat(2, 1fr); }
  .hs-sub-grid { grid-template-columns: 1fr; }
}
@media (max-width: 480px) {
  .custom-options { grid-template-columns: 1fr; }
  .applications-grid { grid-template-columns: 1fr; }
  .product-categories { grid-template-columns: 1fr; }
  .product-showcase { grid-template-columns: 1fr; }
}
.dot-line {
  display: block;
  padding-left: 10px;
  margin-left: 20px;
  position: relative;
  margin-bottom: 4px;
  border-left: 3px solid #c0392b;
}
.dot-line::before {
  content: '';
  position: absolute;
  left: -13px;
  top: 50%;
  transform: translateY(-50%);
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: #c0392b;
}