/* ========================================
   案例页面专用样式
   ======================================== */

/* ===== SECTION SM ===== */
.section-sm {
  padding: var(--space-lg) 0;
}

/* ===== FILTER BAR ===== */
.filter-bar {
  display: flex;
  gap: var(--space-xl);
  flex-wrap: wrap;
}

.filter-group {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.filter-label {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--color-gray-500);
}

.filter-select {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  padding: 0.5rem 2rem 0.5rem 0.75rem;
  border: 1px solid var(--color-gray-300);
  background: var(--color-white);
  cursor: pointer;
  outline: none;
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%23666' stroke-width='2'%3E%3Cpath d='m6 9 6 6 6-6'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 0.5rem center;
}

.filter-select:focus {
  border-color: var(--color-black);
}

/* ===== CASES GRID ===== */
.cases-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-lg);
}

@media (max-width: 1024px) {
  .cases-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 640px) {
  .cases-grid {
    grid-template-columns: 1fr;
  }
}

.case-card {
  display: flex;
  flex-direction: column;
  background: var(--color-white);
  border: 1px solid var(--color-gray-200);
  transition: all var(--duration-normal) var(--ease-out);
}

.case-card:hover {
  border-color: var(--color-black);
  transform: translateY(-4px);
  box-shadow: 0 10px 30px rgba(0,0,0,0.08);
}

.case-image {
  position: relative;
  height: 180px;
  background: var(--color-gray-100);
  display: flex;
  align-items: center;
  justify-content: center;
}

.case-placeholder {
  font-size: 3rem;
  opacity: 0.5;
}

.case-type {
  position: absolute;
  top: var(--space-sm);
  left: var(--space-sm);
  font-family: var(--font-mono);
  font-size: 0.65rem;
  font-weight: 700;
  padding: 0.25rem 0.5rem;
  background: var(--color-black);
  color: var(--color-white);
}

.case-content {
  padding: var(--space-lg);
  display: flex;
  flex-direction: column;
  flex: 1;
}

.case-meta {
  display: flex;
  justify-content: space-between;
  margin-bottom: var(--space-sm);
}

.case-industry {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--color-gray-500);
}

.case-date {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--color-gray-400);
}

.case-content h3 {
  font-family: var(--font-serif);
  font-size: 1.1rem;
  font-weight: 600;
  line-height: 1.4;
  margin-bottom: var(--space-sm);
}

.case-content h3 a:hover {
  text-decoration: underline;
}

.case-content p {
  font-size: 0.9rem;
  color: var(--color-gray-600);
  line-height: 1.6;
  flex: 1;
}

.case-tags {
  display: flex;
  gap: var(--space-xs);
  margin-top: var(--space-md);
  flex-wrap: wrap;
}

.case-tags span {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  padding: 0.2rem 0.5rem;
  background: var(--color-gray-100);
  color: var(--color-gray-600);
}

/* ===== LOAD MORE ===== */
.load-more {
  text-align: center;
  margin-top: var(--space-2xl);
}

/* ===== SUBMIT CTA ===== */
.submit-cta {
  background: var(--color-near-black);
  color: var(--color-white);
}

.cta-content {
  text-align: center;
  max-width: 600px;
  margin: 0 auto;
}

.cta-content h2 {
  font-family: var(--font-serif);
  font-size: 1.75rem;
  font-weight: 600;
  margin-bottom: var(--space-md);
}

.cta-content p {
  color: var(--color-gray-400);
  margin-bottom: var(--space-xl);
}

.submit-cta .btn-primary {
  background: var(--color-white);
  color: var(--color-black);
}

.submit-cta .btn-primary:hover {
  background: var(--color-gray-200);
}

/* ===== MOBILE RESPONSIVE ===== */
@media (max-width: 640px) {
  .filter-bar {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-sm);
  }
  
  .filter-group {
    width: 100%;
  }
  
  .filter-select {
    width: 100%;
    -webkit-appearance: none;
    appearance: none;
  }
  
  .case-card:hover {
    transform: none;
  }
  
  .case-image {
    height: 140px;
  }
  
  .case-content {
    padding: var(--space-md);
  }
  
  .case-content h3 {
    font-size: 1rem;
  }
  
  .case-content p {
    font-size: 0.85rem;
  }
  
  .cta-content h2 {
    font-size: 1.35rem;
  }
  
  /* Page header */
  .page-title {
    font-size: clamp(1.5rem, 6vw, 2.5rem);
  }
  
  .page-desc {
    font-size: 0.95rem;
  }
}