/* ============================================
   WEIHAI ZHENGWEI MACHINERY CO.,LTD — Page Styles
   Industrial Precision Design System
   ============================================ */

/* ---- Mobile menu toggle ---- */
.nav.open .menu-toggle span { display: none; }

/* ---- Page Header (inner pages) ---- */
.page-header {
  background: linear-gradient(135deg, var(--hull) 0%, var(--hull-mid) 100%);
  padding: 120px 0 56px;
  text-align: center;
  color: var(--white);
  position: relative;
  overflow: hidden;
}

.page-header::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--copper), transparent);
  opacity: 0.4;
}

.page-header h1 {
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  font-weight: 800;
  margin-bottom: 12px;
  letter-spacing: -0.02em;
}

.page-header p {
  font-size: 1.05rem;
  opacity: 0.85;
  max-width: 600px;
  margin: 0 auto;
  line-height: 1.7;
}

.breadcrumb {
  margin-top: 20px;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  opacity: 0.6;
  letter-spacing: 0.5px;
}

.breadcrumb a {
  color: var(--copper-light);
  text-decoration: none;
  transition: color var(--transition);
}

.breadcrumb a:hover { color: var(--white); }

/* ---- Section styling for inner pages ---- */
.section {
  padding: 96px 0;
  position: relative;
}

.section-header {
  text-align: center;
  max-width: 720px;
  margin: 0 auto 64px;
}

.section-eyebrow {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 2.5px;
  text-transform: uppercase;
  color: var(--copper);
  margin-bottom: 14px;
  display: inline-block;
  position: relative;
}

.section-eyebrow::before,
.section-eyebrow::after {
  content: '';
  position: absolute;
  top: 50%;
  width: 24px;
  height: 1px;
  background: var(--steel-light);
}

.section-eyebrow::before { right: calc(100% + 12px); }
.section-eyebrow::after { left: calc(100% + 12px); }

.section-title {
  font-size: clamp(1.8rem, 3.5vw, 2.6rem);
  font-weight: 800;
  color: var(--hull);
  line-height: 1.15;
  margin-bottom: 18px;
  letter-spacing: -0.02em;
}

.section-desc {
  color: var(--steel);
  font-size: 1.1rem;
  line-height: 1.7;
}

/* ---- Products listing ---- */
.products-list { display: grid; gap: 24px; }

.product-item {
  display: grid;
  grid-template-columns: 300px 1fr;
  gap: 32px;
  background: var(--white);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow);
  border: 1px solid var(--gray-100);
  transition: all var(--transition);
}

.product-item:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-3px);
}

.product-item-img {
  height: 240px;
  overflow: hidden;
  background: var(--gray-100);
  position: relative;
}

.product-item-img::after {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: var(--copper);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition);
}

.product-item:hover .product-item-img::after { transform: scaleX(1); }

.product-item-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition);
  filter: saturate(0.85);
}

.product-item:hover .product-item-img img { transform: scale(1.05); }

.product-item-body {
  padding: 32px;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.product-item-body h2 {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--hull);
  margin-bottom: 12px;
  letter-spacing: -0.01em;
}

.product-item-body p {
  color: var(--steel);
  margin-bottom: 20px;
  line-height: 1.7;
}

.product-specs {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
  margin-bottom: 20px;
}

.spec-item {
  background: var(--gray-100);
  padding: 12px 16px;
  border-radius: var(--radius);
  border-left: 3px solid var(--copper);
}

.spec-item strong {
  display: block;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--steel);
  margin-bottom: 4px;
  font-weight: 600;
}

.spec-item span {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--hull);
}

.feature-list-lg li {
  padding: 6px 0;
  font-size: 0.95rem;
  display: flex;
  align-items: center;
  gap: 8px;
}

.feature-list-lg .check {
  color: var(--copper);
  font-weight: 700;
  font-family: var(--font-mono);
  font-size: 0.85rem;
}

/* ---- Case Cards - Problem/Solution/Result ---- */
.case-card .case-info p {
  color: var(--steel);
  margin-bottom: 12px;
  line-height: 1.7;
}

.case-card .case-info p strong {
  color: var(--hull);
  font-weight: 600;
}

/* ---- Contact Page ---- */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: start;
}

.contact-info h3 {
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--hull);
  margin-bottom: 16px;
}

.contact-detail {
  padding: 16px 0;
  border-bottom: 1px solid var(--gray-100);
}

.contact-detail:last-child { border-bottom: none; }

.contact-detail strong {
  color: var(--hull);
  display: block;
  margin-bottom: 4px;
  font-weight: 600;
}

.contact-detail p {
  font-size: 0.9rem;
  color: var(--steel);
  line-height: 1.7;
}

.contact-form {
  background: var(--white);
  padding: 32px;
  border-radius: var(--radius-lg);
  border: 1px solid var(--gray-100);
  box-shadow: var(--shadow);
}

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

.form-group label {
  display: block;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--hull);
  margin-bottom: 6px;
}

.form-group input,
.form-group textarea,
.form-group select {
  width: 100%;
  padding: 12px 16px;
  border: 1px solid var(--gray-300);
  border-radius: var(--radius);
  font-family: inherit;
  font-size: 0.95rem;
  transition: all var(--transition);
  background: var(--white);
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
  outline: none;
  border-color: var(--copper);
  box-shadow: 0 0 0 3px rgba(200, 121, 65, 0.1);
}

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

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

/* ---- FAQ Section ---- */
.faq-list {
  max-width: 800px;
  margin: 0 auto;
}

.faq-item {
  background: var(--white);
  padding: 28px 32px;
  border-radius: var(--radius-lg);
  margin-bottom: 16px;
  box-shadow: var(--shadow);
  border: 1px solid var(--gray-100);
  border-left: 4px solid var(--copper);
  transition: all var(--transition);
}

.faq-item:hover {
  border-left-color: var(--hull);
  box-shadow: var(--shadow-lg);
}

.faq-item h3 {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--hull);
  margin-bottom: 12px;
}

.faq-item p {
  font-size: 0.95rem;
  color: var(--steel);
  line-height: 1.7;
}

/* ---- Capability Table ---- */
.capability-table {
  width: 100%;
  border-collapse: collapse;
  margin-top: 24px;
  background: var(--white);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow);
  border: 1px solid var(--gray-100);
}

.capability-table th,
.capability-table td {
  padding: 16px 20px;
  text-align: left;
  border-bottom: 1px solid var(--gray-100);
}

.capability-table th {
  background: var(--hull);
  color: var(--white);
  font-weight: 600;
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.capability-table td {
  font-size: 0.95rem;
  color: var(--steel);
}

.capability-table tr:last-child td { border-bottom: none; }

.capability-table tr:hover td {
  background: var(--gray-100);
}

/* ---- Process Steps ---- */
.process-steps {
  display: grid;
  gap: 24px;
  max-width: 900px;
  margin: 0 auto;
}

.process-step {
  display: grid;
  grid-template-columns: 60px 1fr;
  gap: 24px;
  align-items: start;
}

.step-num {
  width: 60px;
  height: 60px;
  background: var(--hull);
  color: var(--white);
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  font-weight: 800;
  position: relative;
}

.step-num::after {
  content: '';
  position: absolute;
  bottom: -12px;
  left: 50%;
  width: 1px;
  height: 12px;
  background: var(--gray-300);
}

.process-step:last-child .step-num::after { display: none; }

.step-content h3 {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--hull);
  margin-bottom: 8px;
}

.step-content p {
  font-size: 0.95rem;
  color: var(--steel);
  line-height: 1.7;
}

/* ---- Certificates ---- */
.cert-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 24px;
}

.cert-card {
  background: var(--white);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow);
  border: 1px solid var(--gray-100);
  transition: all var(--transition);
}

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

.cert-card img {
  width: 100%;
  height: 200px;
  object-fit: cover;
  background: var(--gray-100);
}

.cert-card-body {
  padding: 20px;
}

.cert-card-body h3 {
  font-size: 1rem;
  font-weight: 700;
  color: var(--hull);
  margin-bottom: 6px;
}

.cert-card-body p {
  font-size: 0.85rem;
  color: var(--steel);
}

/* ---- Cases Detail ---- */
.case-detail {
  max-width: 900px;
  margin: 0 auto;
}

.case-detail-img {
  width: 100%;
  height: 400px;
  object-fit: cover;
  border-radius: var(--radius-lg);
  margin-bottom: 32px;
}

.case-detail h2 {
  font-size: 1.8rem;
  font-weight: 800;
  color: var(--hull);
  margin-bottom: 16px;
  letter-spacing: -0.01em;
}

.case-detail p {
  margin-bottom: 16px;
  line-height: 1.8;
  color: var(--steel);
}

.case-detail h3 {
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--hull);
  margin: 32px 0 12px;
}

/* ---- Product Showcase ---- */
.product-showcase {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: start;
}

.product-main-img {
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--gray-100);
}

.product-main-img img {
  width: 100%;
  height: auto;
  display: block;
}

.product-highlights {
  display: grid;
  gap: 20px;
  margin: 32px 0;
}

.highlight-item {
  display: flex;
  gap: 16px;
  align-items: start;
  padding: 16px;
  background: var(--gray-100);
  border-radius: var(--radius);
  border-left: 3px solid var(--copper);
  transition: all var(--transition);
}

.highlight-item:hover {
  background: var(--gray-50);
  border-left-color: var(--hull);
}

.highlight-icon {
  font-size: 1.8rem;
  flex-shrink: 0;
}

.highlight-item strong {
  display: block;
  color: var(--hull);
  font-size: 1rem;
  margin-bottom: 4px;
}

.highlight-item span {
  font-size: 0.9rem;
  color: var(--steel);
  line-height: 1.6;
}

/* ---- Applications Grid ---- */
.applications-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.app-card {
  background: var(--white);
  padding: 28px;
  border-radius: var(--radius-lg);
  border: 1px solid var(--gray-100);
  transition: all var(--transition);
  position: relative;
  overflow: hidden;
}

.app-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0;
  width: 3px;
  height: 0;
  background: var(--copper);
  transition: height var(--transition);
}

.app-card:hover {
  border-color: var(--copper);
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.app-card:hover::before { height: 100%; }

.app-icon {
  font-size: 2.4rem;
  margin-bottom: 16px;
  display: block;
}

.app-card h3 {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--hull);
  margin-bottom: 10px;
  letter-spacing: -0.01em;
}

.app-card p {
  font-size: 0.88rem;
  color: var(--steel);
  line-height: 1.7;
}

/* ---- Reactor Type Cards ---- */
.reactor-types-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 28px;
}

.reactor-type-card {
  background: var(--white);
  border-radius: var(--radius-lg);
  padding: 32px;
  border: 1px solid var(--gray-100);
  transition: all var(--transition);
}

.reactor-type-card:hover {
  box-shadow: var(--shadow-lg);
  border-color: var(--steel-light);
}

.type-header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 16px;
}

.type-badge {
  background: var(--hull);
  color: var(--white);
  padding: 4px 14px;
  border-radius: var(--radius);
  font-size: 0.78rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  font-family: var(--font-mono);
}

.reactor-type-card h3 {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--hull);
}

.reactor-type-card p {
  font-size: 0.92rem;
  color: var(--steel);
  margin-bottom: 16px;
  line-height: 1.7;
}

/* ---- Agitator Grid ---- */
.agitator-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.agitator-card {
  background: var(--white);
  padding: 28px;
  border-radius: var(--radius-lg);
  border: 1px solid var(--gray-100);
  text-align: center;
  transition: all var(--transition);
}

.agitator-card:hover {
  border-color: var(--copper);
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.agitator-visual {
  font-size: 3rem;
  margin-bottom: 16px;
  display: block;
}

.agitator-card h3 {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--hull);
  margin-bottom: 10px;
}

.agitator-card p {
  font-size: 0.88rem;
  color: var(--steel);
  line-height: 1.7;
}

/* ---- Safety Grid ---- */
.safety-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.safety-item {
  text-align: center;
  padding: 24px 16px;
  background: var(--white);
  border-radius: var(--radius-lg);
  border: 1px solid var(--gray-100);
  transition: all var(--transition);
}

.safety-item:hover {
  border-color: var(--copper);
  transform: translateY(-4px);
}

.safety-icon {
  font-size: 2.4rem;
  margin-bottom: 14px;
  display: block;
}

.safety-item h4 {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--hull);
  margin-bottom: 10px;
}

.safety-item p {
  font-size: 0.85rem;
  color: var(--steel);
  line-height: 1.7;
}

/* ---- Process Grid ---- */
.process-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.process-item {
  background: var(--white);
  padding: 24px;
  border-radius: var(--radius);
  border: 1px solid var(--gray-100);
  transition: all var(--transition);
}

.process-item:hover {
  border-color: var(--copper);
  box-shadow: var(--shadow);
}

.process-tag {
  display: inline-block;
  background: var(--hull);
  color: var(--white);
  padding: 4px 12px;
  border-radius: var(--radius);
  font-size: 0.78rem;
  font-weight: 600;
  margin-bottom: 10px;
  font-family: var(--font-mono);
  letter-spacing: 0.5px;
}

.process-item p {
  font-size: 0.9rem;
  color: var(--steel);
  line-height: 1.6;
}

/* ---- Specs Table ---- */
.specs-table-wrapper {
  overflow-x: auto;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
  border: 1px solid var(--gray-100);
}

.specs-table {
  width: 100%;
  border-collapse: collapse;
  background: var(--white);
}

.specs-table th,
.specs-table td {
  padding: 16px 20px;
  text-align: left;
  border-bottom: 1px solid var(--gray-100);
}

.specs-table th {
  background: var(--hull);
  color: var(--white);
  font-weight: 600;
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  font-family: var(--font-mono);
}

.specs-table td {
  font-size: 0.95rem;
  color: var(--steel);
}

.specs-table tr:last-child td { border-bottom: none; }

.specs-table tr:hover td {
  background: var(--gray-100);
}

/* ---- Responsive ---- */
@media (max-width: 1024px) {
  .about-grid { gap: 40px; }
  .why-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: repeat(2, 1fr); }
  .applications-grid { grid-template-columns: repeat(2, 1fr); }
  .agitator-grid { grid-template-columns: repeat(2, 1fr); }
  .process-grid { grid-template-columns: repeat(2, 1fr); }
  .safety-grid { grid-template-columns: repeat(2, 1fr); }
  .reactor-types-grid { grid-template-columns: 1fr; }
  .product-showcase { grid-template-columns: 1fr; gap: 32px; }
}

@media (max-width: 768px) {
  .product-item { grid-template-columns: 1fr; }
  .product-item-img { height: 200px; }
  .contact-grid { grid-template-columns: 1fr; }
  .form-row { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .case-detail-img { height: 220px; }
  .process-step { grid-template-columns: 1fr; }
  .step-num { width: 48px; height: 48px; font-size: 1rem; }
  .product-showcase { grid-template-columns: 1fr; gap: 32px; }
  .applications-grid { grid-template-columns: 1fr; }
  .reactor-types-grid { grid-template-columns: 1fr; }
  .agitator-grid { grid-template-columns: 1fr; }
  .process-grid { grid-template-columns: 1fr; }
  .safety-grid { grid-template-columns: 1fr; }
  .app-card, .agitator-card, .process-item, .reactor-type-card { padding: 24px 20px; }
  .app-icon, .safety-icon, .agitator-visual { font-size: 2rem; }
  .page-header { padding: 100px 0 40px; }
  .capability-table { display: block; overflow-x: auto; white-space: nowrap; }
  .faq-item { padding: 20px 18px; }
  .contact-form { padding: 24px 18px; }
  .form-group input,
  .form-group textarea,
  .form-group select {
    font-size: 16px; /* prevents iOS zoom on focus */
    padding: 14px 16px;
  }
  .case-detail-img { height: 220px; }
  /* Ensure dropdowns work on touch */
  .nav-dropdown.open > .dropdown-menu {
    display: block !important;
  }
}

@media (max-width: 480px) {
  .hero-title { font-size: 1.7rem; }
  .hero-actions { flex-direction: column; }
  .hero-actions .btn { width: 100%; }
  .cta-actions { flex-direction: column; }
  .cta-actions .btn { width: 100%; }
  .product-specs { grid-template-columns: 1fr; }
  .page-header h1 { font-size: 1.6rem; }
  .page-header p { font-size: 0.9rem; }
  .section { padding: 64px 0; }
  .section-header { margin-bottom: 40px; }
}