/* =========================================
   Yulong Global - Lifting Equipment Website
   Style: Industrial Blue Professional
   ========================================= */

/* ---- Fonts ---- */
/* ---- CSS Variables ---- */
:root {
  --primary-dark: #1a365d;
  --primary: #2b6cb0;
  --primary-light: #3182ce;
  --primary-lighter: #bee3f8;
  --accent: #e53e3e;
  --accent-hover: #c53030;
  --bg: #f7fafc;
  --bg-white: #ffffff;
  --bg-gray: #edf2f7;
  --text-dark: #1a202c;
  --text: #2d3748;
  --text-light: #718096;
  --text-lighter: #a0aec0;
  --border: #e2e8f0;
  --shadow: 0 1px 3px rgba(0,0,0,0.1);
  --shadow-md: 0 4px 6px rgba(0,0,0,0.1);
  --shadow-lg: 0 10px 15px rgba(0,0,0,0.1);
  --radius: 8px;
  --radius-lg: 12px;
  --transition: 0.3s ease;
  --max-width: 1200px;
  --header-height: 72px;
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: , BlinkMacSystemFont, 'Segoe UI', sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

a {
  color: var(--primary);
  text-decoration: none;
  transition: color var(--transition);
}
a:hover { color: var(--primary-dark); }

img {
  max-width: 100%;
  height: auto;
  display: block;
}

ul { list-style: none; }

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 20px;
}

.section {
  padding: 80px 0;
}

.section-title {
  font-size: 2rem;
  font-weight: 700;
  color: var(--text-dark);
  text-align: center;
  margin-bottom: 12px;
}

.section-subtitle {
  font-size: 1.1rem;
  color: var(--text-light);
  text-align: center;
  max-width: 600px;
  margin: 0 auto 48px;
}

/* ---- Header / Navigation ---- */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--header-height);
  background: var(--bg-white);
  box-shadow: var(--shadow);
  z-index: 1000;
  transition: background var(--transition);
}

.header.scrolled {
  background: rgba(255,255,255,0.97);
  box-shadow: var(--shadow-md);
}

.header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--primary-dark);
}

.logo img { height: 40px; width: auto; }

.logo span {
  font-size: 0.85rem;
  font-weight: 400;
  color: var(--text-light);
  display: block;
}

.nav { display: flex; align-items: center; gap: 32px; }

.nav a {
  color: var(--text);
  font-weight: 500;
  font-size: 0.95rem;
  position: relative;
  padding: 4px 0;
}

.nav a::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--primary);
  transition: width var(--transition);
}

.nav a:hover::after,
.nav a.active::after { width: 100%; }
.nav a:hover { color: var(--primary); }

.nav-item-dropdown { position: relative; }

.nav-item-dropdown > a {
  display: flex;
  align-items: center;
  gap: 4px;
}

.nav-item-dropdown > a::after {
  content: '';
  display: inline-block;
  width: 6px;
  height: 6px;
  border-right: 2px solid var(--text);
  border-bottom: 2px solid var(--text);
  transform: rotate(45deg);
  margin-left: 4px;
  transition: transform var(--transition);
}

.nav-item-dropdown:hover > a::after {
  transform: rotate(-135deg);
  border-color: var(--primary);
}

.dropdown-menu {
  position: absolute;
  top: 100%;
  left: -16px;
  background: var(--bg-white);
  border-radius: var(--radius);
  box-shadow: var(--shadow-lg);
  min-width: 240px;
  padding: 8px 0;
  opacity: 0;
  visibility: hidden;
  transform: translateY(8px);
  transition: all var(--transition);
  z-index: 100;
}

.nav-item-dropdown:hover .dropdown-menu {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.dropdown-menu a {
  display: block;
  padding: 10px 20px;
  font-size: 0.9rem;
  color: var(--text);
  transition: background var(--transition), color var(--transition);
}

.dropdown-menu a:hover {
  background: var(--bg);
  color: var(--primary);
}

.dropdown-menu a::after { display: none; }

.dropdown-menu .dropdown-label {
  padding: 8px 20px 4px;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--text-lighter);
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 28px;
  border-radius: var(--radius);
  font-weight: 600;
  font-size: 0.95rem;
  cursor: pointer;
  transition: all var(--transition);
  border: none;
  font-family: inherit;
}

.btn-primary {
  background: var(--accent);
  color: #fff;
}
.btn-primary:hover {
  background: var(--accent-hover);
  color: #fff;
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

.btn-outline {
  background: transparent;
  color: var(--primary);
  border: 2px solid var(--primary);
}
.btn-outline:hover {
  background: var(--primary);
  color: #fff;
  transform: translateY(-1px);
}

.btn-white {
  background: #fff;
  color: var(--primary-dark);
}
.btn-white:hover {
  background: var(--bg);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

.menu-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 4px;
  background: none;
  border: none;
}

.menu-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--text-dark);
  transition: all var(--transition);
}

.menu-toggle.active span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}
.menu-toggle.active span:nth-child(2) { opacity: 0; }
.menu-toggle.active span:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

.hero {
  padding-top: var(--header-height);
  min-height: 100vh;
  display: flex;
  align-items: center;
  background: linear-gradient(135deg, var(--primary-dark) 0%, #2d4a7a 50%, var(--primary) 100%);
  color: #fff;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -20%;
  width: 600px;
  height: 600px;
  border-radius: 50%;
  background: rgba(255,255,255,0.03);
}

.hero::after {
  content: '';
  position: absolute;
  bottom: -30%;
  left: -10%;
  width: 400px;
  height: 400px;
  border-radius: 50%;
  background: rgba(255,255,255,0.02);
}

.hero .container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
  position: relative;
  z-index: 1;
}

.hero-content h1 {
  font-size: 3rem;
  font-weight: 800;
  line-height: 1.15;
  margin-bottom: 20px;
  letter-spacing: -0.5px;
}

.hero-content h1 span {
  color: #fbd38d;
}

.hero-content p {
  font-size: 1.15rem;
  line-height: 1.7;
  color: rgba(255,255,255,0.85);
  margin-bottom: 32px;
  max-width: 520px;
}

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

.hero-image {
  display: flex;
  justify-content: center;
  align-items: center;
}

.hero-image svg {
  width: 100%;
  max-width: 500px;
  height: auto;
  filter: drop-shadow(0 20px 40px rgba(0,0,0,0.2));
}

.hero-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: 48px;
  padding-top: 32px;
  border-top: 1px solid rgba(255,255,255,0.15);
}

.hero-stat-value {
  font-size: 1.75rem;
  font-weight: 700;
}

.hero-stat-label {
  font-size: 0.85rem;
  color: rgba(255,255,255,0.65);
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}

.feature-card {
  background: var(--bg-white);
  border-radius: var(--radius-lg);
  padding: 36px 28px;
  box-shadow: var(--shadow);
  transition: all var(--transition);
  text-align: center;
}

.feature-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.feature-icon {
  width: 64px;
  height: 64px;
  background: var(--primary-lighter);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 20px;
  font-size: 1.5rem;
  color: var(--primary);
}

.feature-card h3 {
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--text-dark);
  margin-bottom: 12px;
}

.feature-card p {
  font-size: 0.95rem;
  color: var(--text-light);
  line-height: 1.65;
}

.products-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 28px;
}

.product-card {
  background: var(--bg-white);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow);
  transition: all var(--transition);
  border: 1px solid var(--border);
}

.product-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.product-card-image {
  height: 220px;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 28px;
  background: var(--bg);
}

.product-card-image svg {
  max-width: 180px;
  max-height: 180px;
}

.product-card-body {
  padding: 24px;
}

.product-card-body h3 {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--text-dark);
  margin-bottom: 8px;
}

.product-card-body .category-tag {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--primary);
  background: var(--primary-lighter);
  padding: 3px 10px;
  border-radius: 20px;
  margin-bottom: 10px;
}

.product-card-body p {
  font-size: 0.9rem;
  color: var(--text-light);
  line-height: 1.6;
  margin-bottom: 16px;
}

.product-card-body .spec-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 16px;
}

.product-card-body .spec-list li {
  font-size: 0.8rem;
  background: var(--bg-gray);
  padding: 4px 10px;
  border-radius: 4px;
  color: var(--text-light);
}

.product-detail {
  padding-top: calc(var(--header-height) + 40px);
  padding-bottom: 60px;
}

.product-detail .breadcrumb {
  font-size: 0.85rem;
  color: var(--text-light);
  margin-bottom: 32px;
}

.product-detail .breadcrumb a { color: var(--primary); }
.product-detail .breadcrumb a:hover { text-decoration: underline; }

.product-detail-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  margin-bottom: 48px;
}

.product-detail-image {
  background: var(--bg-white);
  border-radius: var(--radius-lg);
  padding: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--border);
  min-height: 400px;
}

.product-detail-image svg {
  max-width: 300px;
  max-height: 300px;
}

.product-detail-info h1 {
  font-size: 2rem;
  font-weight: 700;
  color: var(--text-dark);
  margin-bottom: 8px;
}

.product-detail-info .product-category {
  font-size: 0.85rem;
  color: var(--primary);
  font-weight: 500;
  margin-bottom: 20px;
}

.product-detail-info .product-description {
  font-size: 1rem;
  line-height: 1.7;
  color: var(--text);
  margin-bottom: 24px;
}

.specs-table {
  width: 100%;
  border-collapse: collapse;
  margin-bottom: 24px;
}

.specs-table th,
.specs-table td {
  text-align: left;
  padding: 12px 16px;
  border-bottom: 1px solid var(--border);
  font-size: 0.95rem;
}

.specs-table th {
  font-weight: 600;
  color: var(--text-dark);
  background: var(--bg);
  width: 40%;
}

.specs-table td { color: var(--text); }

.product-features {
  margin-bottom: 24px;
}

.product-features h3,
.product-applications h3 {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--text-dark);
  margin-bottom: 12px;
}

.product-features ul,
.product-applications ul {
  list-style: disc;
  padding-left: 20px;
}

.product-features li,
.product-applications li {
  font-size: 0.95rem;
  color: var(--text);
  margin-bottom: 6px;
  line-height: 1.6;
}

.product-cta {
  background: var(--bg-gray);
  border-radius: var(--radius-lg);
  padding: 40px;
  text-align: center;
  margin-top: 48px;
}

.product-cta h2 {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-dark);
  margin-bottom: 12px;
}

.product-cta p {
  font-size: 1rem;
  color: var(--text-light);
  margin-bottom: 24px;
}

.blog-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
  gap: 28px;
}

.blog-card {
  background: var(--bg-white);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow);
  transition: all var(--transition);
  border: 1px solid var(--border);
}

.blog-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.blog-card-body {
  padding: 24px;
}

.blog-card-body .blog-date {
  font-size: 0.8rem;
  color: var(--text-lighter);
  margin-bottom: 8px;
}

.blog-card-body h3 {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--text-dark);
  margin-bottom: 10px;
  line-height: 1.4;
}

.blog-card-body p {
  font-size: 0.9rem;
  color: var(--text-light);
  line-height: 1.6;
  margin-bottom: 16px;
}

.blog-card-body .blog-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: 12px;
}

.blog-card-body .blog-tags span {
  font-size: 0.75rem;
  background: var(--primary-lighter);
  color: var(--primary);
  padding: 2px 10px;
  border-radius: 20px;
}

.blog-card-body .read-more {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--primary);
}

.blog-card-body .read-more:hover { color: var(--primary-dark); }

.blog-article {
  padding-top: calc(var(--header-height) + 40px);
  padding-bottom: 60px;
}

.blog-article .container {
  max-width: 800px;
}

.blog-article .breadcrumb {
  font-size: 0.85rem;
  color: var(--text-light);
  margin-bottom: 24px;
}

.blog-article h1 {
  font-size: 2.25rem;
  font-weight: 700;
  color: var(--text-dark);
  line-height: 1.25;
  margin-bottom: 16px;
}

.blog-article .article-meta {
  font-size: 0.9rem;
  color: var(--text-lighter);
  margin-bottom: 32px;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--border);
}

.blog-article article {
  font-size: 1.05rem;
  line-height: 1.8;
  color: var(--text);
}

.blog-article article h2 {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-dark);
  margin: 40px 0 16px;
}

.blog-article article h3 {
  font-size: 1.2rem;
  font-weight: 600;
  color: var(--text-dark);
  margin: 28px 0 12px;
}

.blog-article article p {
  margin-bottom: 16px;
}

.blog-article article ul,
.blog-article article ol {
  margin-bottom: 16px;
  padding-left: 24px;
}

.blog-article article li {
  margin-bottom: 8px;
}

.blog-article article ul { list-style: disc; }
.blog-article article ol { list-style: decimal; }

.blog-article article strong {
  font-weight: 600;
  color: var(--text-dark);
}

.blog-article .article-cta {
  background: var(--bg-gray);
  border-radius: var(--radius-lg);
  padding: 32px;
  text-align: center;
  margin: 40px 0;
}

.blog-article .article-cta h3 {
  font-size: 1.2rem;
  font-weight: 600;
  color: var(--text-dark);
  margin-bottom: 8px;
}

.blog-article .article-cta p {
  font-size: 0.95rem;
  color: var(--text-light);
  margin-bottom: 16px;
}

.about-hero {
  padding-top: calc(var(--header-height) + 60px);
  padding-bottom: 60px;
  background: linear-gradient(135deg, var(--primary-dark), var(--primary));
  color: #fff;
  text-align: center;
}

.about-hero h1 {
  font-size: 2.5rem;
  font-weight: 700;
  margin-bottom: 16px;
}

.about-hero p {
  font-size: 1.1rem;
  color: rgba(255,255,255,0.85);
  max-width: 650px;
  margin: 0 auto;
}

.about-section {
  padding: 60px 0;
}

.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
}

.about-text h2 {
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--text-dark);
  margin-bottom: 20px;
}

.about-text p {
  font-size: 1rem;
  line-height: 1.7;
  color: var(--text);
  margin-bottom: 16px;
}

.about-image {
  display: flex;
  justify-content: center;
}

.about-image svg {
  max-width: 400px;
  height: auto;
}

.values-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.value-card {
  text-align: center;
  padding: 28px 20px;
  background: var(--bg-white);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
}

.value-card .value-icon {
  font-size: 2rem;
  margin-bottom: 16px;
}

.value-card h3 {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-dark);
  margin-bottom: 8px;
}

.value-card p {
  font-size: 0.85rem;
  color: var(--text-light);
  line-height: 1.5;
}

.contact-page {
  padding-top: calc(var(--header-height) + 40px);
  padding-bottom: 60px;
}

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
}

.contact-info h1 {
  font-size: 2rem;
  font-weight: 700;
  color: var(--text-dark);
  margin-bottom: 16px;
}

.contact-info > p {
  font-size: 1rem;
  color: var(--text-light);
  margin-bottom: 32px;
}

.contact-details {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.contact-item {
  display: flex;
  gap: 16px;
  align-items: flex-start;
}

.contact-item .contact-icon {
  width: 48px;
  height: 48px;
  background: var(--primary-lighter);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  font-size: 1.2rem;
}

.contact-item h3 {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-dark);
  margin-bottom: 4px;
}

.contact-item p {
  font-size: 0.9rem;
  color: var(--text-light);
  line-height: 1.5;
}

.contact-form-wrapper {
  background: var(--bg-white);
  border-radius: var(--radius-lg);
  padding: 36px;
  box-shadow: var(--shadow);
  border: 1px solid var(--border);
}

.contact-form-wrapper h2 {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--text-dark);
  margin-bottom: 24px;
}

.form-group {
  margin-bottom: 20px;
}

.form-group label {
  display: block;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-dark);
  margin-bottom: 6px;
}

.form-group input,
.form-group textarea,
.form-group select {
  width: 100%;
  padding: 12px 16px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-size: 0.95rem;
  font-family: inherit;
  color: var(--text);
  background: var(--bg);
  transition: border-color var(--transition), box-shadow var(--transition);
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(43,108,176,0.15);
}

.form-group textarea {
  min-height: 120px;
  resize: vertical;
}

.form-success {
  display: none;
  text-align: center;
  padding: 40px;
}

.form-success.show { display: block; }
.form-success h3 { font-size: 1.3rem; color: var(--text-dark); margin-bottom: 8px; }
.form-success p { color: var(--text-light); }

.footer {
  background: var(--primary-dark);
  color: rgba(255,255,255,0.85);
  padding: 60px 0 0;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
  padding-bottom: 40px;
  border-bottom: 1px solid rgba(255,255,255,0.1);
}

.footer-brand .logo-text {
  font-size: 1.2rem;
  font-weight: 700;
  margin-bottom: 12px;
}

.footer-brand p {
  font-size: 0.9rem;
  line-height: 1.6;
  color: rgba(255,255,255,0.6);
  max-width: 300px;
}

.footer h4 {
  font-size: 0.95rem;
  font-weight: 600;
  color: #fff;
  margin-bottom: 20px;
}

.footer ul li { margin-bottom: 10px; }

.footer ul a {
  font-size: 0.88rem;
  color: rgba(255,255,255,0.6);
  transition: color var(--transition);
}

.footer ul a:hover { color: #fff; }

.footer-contact li {
  font-size: 0.88rem;
  color: rgba(255,255,255,0.6);
  margin-bottom: 10px;
  line-height: 1.5;
}

.footer-bottom {
  padding: 20px 0;
  text-align: center;
  font-size: 0.85rem;
  color: rgba(255,255,255,0.4);
}

.page-header {
  padding-top: calc(var(--header-height) + 40px);
  padding-bottom: 40px;
  background: linear-gradient(135deg, var(--primary-dark), var(--primary));
  color: #fff;
  text-align: center;
}

.page-header h1 {
  font-size: 2.25rem;
  font-weight: 700;
  margin-bottom: 8px;
}

.page-header p {
  font-size: 1.05rem;
  color: rgba(255,255,255,0.8);
  max-width: 550px;
  margin: 0 auto;
}

.breadcrumb {
  font-size: 0.85rem;
  color: var(--text-light);
  margin-bottom: 24px;
}

.breadcrumb a { color: var(--primary); }
.breadcrumb span { color: var(--text); }

.back-to-top {
  position: fixed;
  bottom: 30px;
  right: 30px;
  width: 48px;
  height: 48px;
  background: var(--primary);
  color: #fff;
  border: none;
  border-radius: 50%;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  box-shadow: var(--shadow-md);
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition);
  z-index: 100;
}

.back-to-top.show {
  opacity: 1;
  visibility: visible;
}

.back-to-top:hover {
  background: var(--primary-dark);
  transform: translateY(-2px);
}

@media (max-width: 1024px) {
  .hero .container {
    grid-template-columns: 1fr;
    text-align: center;
  }
  .hero-content p { margin: 0 auto 32px; }
  .hero-buttons { justify-content: center; }
  .hero-image { display: none; }
  .hero-stats { max-width: 500px; margin: 48px auto 0; }
  .hero-content h1 { font-size: 2.5rem; }
  .about-grid { grid-template-columns: 1fr; text-align: center; }
  .values-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
  .menu-toggle { display: flex; }
  .nav {
    position: fixed;
    top: var(--header-height);
    left: 0;
    right: 0;
    background: var(--bg-white);
    flex-direction: column;
    padding: 20px;
    box-shadow: var(--shadow-lg);
    gap: 0;
    transform: translateY(-100%);
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition);
  }
  .nav.active {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
  }
  .nav a {
    display: block;
    padding: 14px 0;
    border-bottom: 1px solid var(--border);
    width: 100%;
  }
  .nav a::after { display: none; }
  .nav .btn { margin-top: 14px; }
  .dropdown-menu {
    position: static;
    box-shadow: none;
    opacity: 1;
    visibility: visible;
    transform: none;
    padding: 0 0 0 16px;
    display: none;
  }
  .dropdown-menu.show { display: block; }
  .nav-item-dropdown > a::after {
    transition: transform var(--transition);
  }
  .nav-item-dropdown.open > a::after {
    transform: rotate(-135deg);
  }
  .section { padding: 60px 0; }
  .section-title { font-size: 1.65rem; }
  .features-grid { grid-template-columns: 1fr; }
  .product-detail-grid { grid-template-columns: 1fr; }
  .contact-grid { grid-template-columns: 1fr; }
  .footer-grid {
    grid-template-columns: 1fr;
    text-align: center;
  }
  .footer-brand p { margin: 0 auto; }
  .values-grid { grid-template-columns: 1fr; }
  .hero-content h1 { font-size: 2rem; }
  .hero-stats { grid-template-columns: 1fr; text-align: center; }
  .blog-grid { grid-template-columns: 1fr; }
  .products-grid { grid-template-columns: 1fr; }
  .page-header h1 { font-size: 1.75rem; }
  .product-detail-grid { gap: 24px; }
}

@media (max-width: 480px) {
  .hero-content h1 { font-size: 1.65rem; }
  .section-title { font-size: 1.4rem; }
  .btn { padding: 10px 20px; font-size: 0.9rem; }
  .contact-form-wrapper { padding: 24px; }
  .product-cta { padding: 24px; }
}