/* ========================================
   内页公共样式（关于、方案、产品、联系）
   ======================================== */

/* --- Page Hero (内页顶部) --- */
.page-hero {
  padding: 180px 0 100px;
  text-align: center;
  position: relative;
  overflow: hidden;
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border-color);
}

.page-hero::before {
  content: '';
  position: absolute;
  top: -50%;
  left: 50%;
  transform: translateX(-50%);
  width: 800px;
  height: 800px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(245, 208, 32, 0.04), transparent 60%);
}

.page-hero h1 {
  font-size: clamp(2.2rem, 4vw, 3.2rem);
  margin-bottom: 16px;
  position: relative;
}

.page-hero p {
  font-size: 1.1rem;
  max-width: 600px;
  margin: 0 auto;
  position: relative;
}

/* --- Breadcrumb --- */
.breadcrumb {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  margin-bottom: 24px;
  font-size: 0.85rem;
  color: var(--text-muted);
}

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

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

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

/* --- About Page --- */
.about-intro {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
}

.about-intro-text h2 {
  margin-bottom: 24px;
  color: #1a1a2e;
}

.about-intro-text p {
  margin-bottom: 16px;
  color: #4a5568;
}

.about-intro-image {
  height: 400px;
  background: linear-gradient(135deg, #f0f4f8, #e8ecf0);
  border: 1px solid #e2e8f0;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #a0aec0;
  font-size: 0.9rem;
}

/* Timeline */
.timeline {
  position: relative;
  padding-left: 40px;
  max-width: 700px;
  margin: 0 auto;
}

.timeline::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 2px;
  background: linear-gradient(to bottom, #d4a80e, #0090b3, transparent);
}

.timeline-item {
  position: relative;
  padding-bottom: 50px;
}

.timeline-item::before {
  content: '';
  position: absolute;
  left: -44px;
  top: 6px;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: #d4a80e;
  box-shadow: 0 0 12px rgba(212, 168, 14, 0.3);
}

.timeline-year {
  font-family: var(--font-en);
  font-size: 1.1rem;
  font-weight: 700;
  color: #d4a80e;
  margin-bottom: 8px;
}

.timeline-item h4 {
  margin-bottom: 8px;
  color: #1a1a2e;
}

.timeline-item p {
  font-size: 0.92rem;
  color: #4a5568;
}

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

.cert-card {
  background: #ffffff;
  border: 1px solid #e2e8f0;
  border-radius: 8px;
  padding: 30px;
  text-align: center;
  transition: all var(--transition-fast);
  box-shadow: 0 2px 12px rgba(0, 0, 0, 0.04);
}

.cert-card:hover {
  border-color: rgba(0, 144, 179, 0.3);
  transform: translateY(-3px);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.08);
}

.cert-icon {
  width: 48px;
  height: 48px;
  margin: 0 auto 16px;
  color: #0090b3;
}

.cert-card h4 {
  font-size: 1rem;
  margin-bottom: 8px;
  color: #1a1a2e;
}

.cert-card p {
  font-size: 0.85rem;
  color: #4a5568;
}

/* --- Solutions Page --- */
.solution-detail {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
  padding: 60px 0;
  border-bottom: 1px solid #e2e8f0;
}

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

.solution-detail:nth-child(even) {
  direction: rtl;
}

.solution-detail:nth-child(even) > * {
  direction: ltr;
}

.solution-detail-image {
  height: 320px;
  background: linear-gradient(135deg, #f0f4f8, #e8ecf0);
  border: 1px solid #e2e8f0;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #a0aec0;
}

.solution-detail-text h3 {
  font-size: 1.6rem;
  margin-bottom: 16px;
  color: #1a1a2e;
}

.solution-detail-text p {
  margin-bottom: 16px;
  color: #4a5568;
}

.solution-features {
  margin-top: 20px;
}

.solution-features li {
  padding: 8px 0;
  padding-left: 24px;
  position: relative;
  color: #4a5568;
  font-size: 0.95rem;
}

.solution-features li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 16px;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #d4a80e;
}

/* --- Products Page --- */
.products-filter {
  display: flex;
  justify-content: center;
  gap: 16px;
  margin-bottom: 60px;
  flex-wrap: wrap;
}

.filter-btn {
  padding: 10px 24px;
  font-size: 0.9rem;
  border: 1px solid #e2e8f0;
  border-radius: 4px;
  color: #4a5568;
  transition: all var(--transition-fast);
  background: #ffffff;
}

.filter-btn:hover,
.filter-btn.active {
  border-color: #d4a80e;
  color: #d4a80e;
  background: rgba(212, 168, 14, 0.05);
}

.product-list-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 30px;
}

.product-list-grid .product-card {
  background: #ffffff;
  border: 1px solid #e2e8f0;
  border-radius: 8px;
  overflow: hidden;
  transition: all var(--transition-fast);
  box-shadow: 0 2px 12px rgba(0, 0, 0, 0.04);
}

.product-list-grid .product-card:hover {
  border-color: rgba(0, 144, 179, 0.3);
  transform: translateY(-4px);
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.1);
}

.product-list-grid .product-image {
  height: 200px;
  background: linear-gradient(135deg, #f0f4f8, #e8ecf0);
  display: flex;
  align-items: center;
  justify-content: center;
}

.product-list-grid .product-placeholder {
  font-family: var(--font-en);
  font-size: 1.5rem;
  font-weight: 700;
  color: #a0aec0;
  letter-spacing: 2px;
}

.product-list-grid .product-info {
  padding: 24px;
}

.product-list-grid .product-tag {
  display: inline-block;
  font-size: 0.75rem;
  padding: 4px 12px;
  background: rgba(0, 144, 179, 0.08);
  color: #0090b3;
  border-radius: 2px;
  margin-bottom: 12px;
}

.product-list-grid .product-info h3 {
  font-size: 1.05rem;
  margin-bottom: 10px;
  color: #1a1a2e;
}

.product-list-grid .product-info p {
  font-size: 0.88rem;
  color: #4a5568;
}

/* --- Contact Page --- */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
}

.contact-form {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.form-group label {
  font-size: 0.9rem;
  color: #4a5568;
}

.form-group input,
.form-group textarea,
.form-group select {
  background: #ffffff;
  border: 1px solid #e2e8f0;
  border-radius: 4px;
  padding: 14px 18px;
  color: #1a1a2e;
  font-family: var(--font-body);
  font-size: 0.95rem;
  transition: border-color var(--transition-fast);
  outline: none;
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
  border-color: #0090b3;
}

.form-group textarea {
  min-height: 140px;
  resize: vertical;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}

.contact-info-list {
  display: flex;
  flex-direction: column;
  gap: 30px;
}

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

.contact-info-icon {
  width: 44px;
  height: 44px;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(0, 144, 179, 0.08);
  border-radius: 6px;
  color: #0090b3;
}

.contact-info-item h4 {
  font-size: 1rem;
  margin-bottom: 4px;
  color: #1a1a2e;
}

.contact-info-item p {
  font-size: 0.9rem;
  color: #4a5568;
}

.contact-map {
  margin-top: 40px;
  height: 250px;
  background: #f0f4f8;
  border: 1px solid #e2e8f0;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #a0aec0;
}

/* --- Responsive (内页) --- */
@media (max-width: 768px) {
  .page-hero {
    padding: 140px 0 70px;
  }

  .about-intro {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .cert-grid {
    grid-template-columns: 1fr;
  }

  .solution-detail {
    grid-template-columns: 1fr;
    gap: 30px;
  }

  .solution-detail:nth-child(even) {
    direction: ltr;
  }

  .product-list-grid {
    grid-template-columns: 1fr;
  }

  .contact-grid {
    grid-template-columns: 1fr;
    gap: 50px;
  }

  .form-row {
    grid-template-columns: 1fr;
  }
}