/* ============ 客户案例系列专属样式 ============ */
.case-section-heading {
  max-width: 800px;
  margin: 0 auto 3rem;
  text-align: center;
}
.case-section-heading .section-subtitle { margin: 0 auto; }

/* 案例横幅 - 深色质感 */
.cases-banner {
  position: relative;
  padding: 7rem 2rem 4rem;
  background: var(--color-ink);
  color: #fff;
  text-align: center;
  overflow: hidden;
}
.cases-banner::before {
  content: '';
  position: absolute;
  inset: 0;
  background: url('../images/restaurant-case.jpg') center/cover;
  opacity: 0.25;
}
.cases-banner::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(26,26,26,0.7), rgba(26,26,26,0.9));
}
.cases-banner-content { position: relative; z-index: 2; }
.cases-banner h1 {
  font-family: var(--font-serif);
  font-size: 2.8rem;
  margin-bottom: 0.6rem;
}
.cases-banner .breadcrumb { font-size: 0.9rem; opacity: 0.8; }
.cases-banner .breadcrumb a:hover { color: var(--color-primary-light); }
.cases-banner .breadcrumb span { margin: 0 0.5rem; color: var(--color-primary); }

/* 案例子导航 - 胶囊标签 */
.cases-subnav {
  background: var(--color-paper);
  border-bottom: 1px solid var(--color-mist);
  padding: 1.5rem 2rem;
}
.cases-subnav-inner {
  max-width: 1320px;
  margin: 0 auto;
  display: flex;
  gap: 1rem;
  justify-content: center;
  flex-wrap: wrap;
}
.cases-subnav-inner a {
  padding: 0.7rem 1.8rem;
  border-radius: 50px;
  font-size: 0.95rem;
  color: var(--color-slate);
  background: var(--color-sand);
  font-weight: 500;
  transition: all 0.25s;
}
.cases-subnav-inner a:hover { background: var(--color-mist); }
.cases-subnav-inner a.active {
  background: var(--color-primary);
  color: #fff;
}

/* 案例总览 - 数据+引言 */
.cases-overview {
  padding: 5rem 2rem;
  background: var(--color-cream);
}
.cases-overview-stats {
  max-width: 1320px;
  margin: 0 auto 4rem;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 2rem;
  text-align: center;
}
.cos-item .num {
  font-family: var(--font-serif);
  font-size: 3rem;
  font-weight: 800;
  color: var(--color-primary);
  line-height: 1;
}
.cos-item .unit { font-size: 1.1rem; color: var(--color-accent); }
.cos-item .label {
  margin-top: 0.6rem;
  color: var(--color-slate);
  font-size: 0.95rem;
}
.cases-overview-intro {
  max-width: 800px;
  margin: 0 auto 4rem;
  text-align: center;
}
.cases-overview-intro p {
  font-size: 1.1rem;
  line-height: 2;
  color: var(--color-slate);
}
.cases-overview-cats {
  max-width: 1320px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
}
.coc-card {
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--color-paper);
  box-shadow: var(--shadow-sm);
  transition: all 0.4s;
  display: block;
}
.coc-card:hover { transform: translateY(-8px); box-shadow: var(--shadow-lg); }
.coc-card-img {
  height: 220px;
  background-size: cover;
  background-position: center;
  position: relative;
}
.coc-card-img::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 50%, rgba(0,0,0,0.5));
}
.coc-card-img .icon {
  position: absolute;
  bottom: 1rem; left: 1rem;
  font-size: 2rem;
  z-index: 2;
}
.coc-card-body { padding: 1.8rem; }
.coc-card-body h3 {
  font-family: var(--font-serif);
  font-size: 1.4rem;
  margin-bottom: 0.5rem;
}
.coc-card-body p {
  color: var(--color-text-light);
  font-size: 0.9rem;
  line-height: 1.7;
  margin-bottom: 1rem;
}
.coc-card-body .count {
  color: var(--color-primary);
  font-weight: 700;
  font-size: 0.9rem;
}

/* ===== 门店/工厂案例 - 杂志画廊 ===== */
.case-gallery {
  padding: 5rem 2rem;
  background: var(--color-cream);
}
.case-gallery-grid {
  max-width: 1320px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
}
.case-card {
  background: var(--color-paper);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: all 0.4s cubic-bezier(0.16,1,0.3,1);
  cursor: pointer;
}
.case-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); }
.case-card-img {
  height: 240px;
  background-size: cover;
  background-position: center;
  position: relative;
  overflow: hidden;
}
.case-card-img::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 40%, rgba(0,0,0,0.5));
  transition: background 0.3s;
}
.case-card:hover .case-card-img::after {
  background: linear-gradient(180deg, transparent 20%, rgba(0,0,0,0.6));
}
.case-card-img .case-location {
  position: absolute;
  top: 1rem; left: 1rem;
  background: rgba(255,255,255,0.9);
  color: var(--color-ink);
  padding: 0.3rem 0.9rem;
  border-radius: 50px;
  font-size: 0.78rem;
  font-weight: 600;
  z-index: 2;
}
.case-card-img .case-cat {
  position: absolute;
  bottom: 1rem; left: 1rem;
  color: #fff;
  font-size: 0.85rem;
  font-weight: 600;
  z-index: 2;
  display: flex;
  align-items: center;
  gap: 0.4rem;
}
.case-card-body { padding: 1.5rem; }
.case-card-body h3 {
  font-family: var(--font-serif);
  font-size: 1.25rem;
  margin-bottom: 0.5rem;
}
.case-card-body .case-meta {
  display: flex;
  gap: 1rem;
  font-size: 0.8rem;
  color: var(--color-stone);
  margin-bottom: 0.8rem;
}
.case-card-body .case-meta span { display: flex; align-items: center; gap: 0.3rem; }
.case-card-body p {
  font-size: 0.88rem;
  color: var(--color-text-light);
  line-height: 1.7;
  margin-bottom: 1rem;
}
.case-card-body .case-results {
  display: flex;
  gap: 1rem;
  padding-top: 1rem;
  border-top: 1px solid var(--color-mist);
}
.case-card-body .result-item .v {
  font-family: var(--font-serif);
  font-size: 1.3rem;
  font-weight: 800;
  color: var(--color-primary);
}
.case-card-body .result-item .l {
  font-size: 0.72rem;
  color: var(--color-text-light);
}

/* ===== 视频案例 - 视频网格 ===== */
.video-gallery {
  padding: 5rem 2rem;
  background: var(--color-cream);
}
.video-gallery-grid {
  max-width: 1320px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 2rem;
}
.video-card {
  background: var(--color-paper);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: all 0.4s;
}
.video-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); }
.video-thumb {
  position: relative;
  aspect-ratio: 16/9;
  background: var(--color-ink);
  cursor: pointer;
  overflow: hidden;
}
.video-thumb-bg {
  position: absolute;
  inset: 0;
  background-size: cover;
  background-position: center;
  transition: transform 0.4s;
}
.video-card:hover .video-thumb-bg { transform: scale(1.05); }
.video-thumb::after {
  content: '';
  position: absolute;
  inset: 0;
  background: rgba(0,0,0,0.35);
  transition: background 0.3s;
}
.video-card:hover .video-thumb::after { background: rgba(0,0,0,0.2); }
.video-play-btn {
  position: absolute;
  top: 50%; left: 50%;
  transform: translate(-50%, -50%);
  width: 70px; height: 70px;
  border-radius: 50%;
  background: var(--color-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 2;
  transition: all 0.3s;
  box-shadow: var(--shadow-red);
}
.video-card:hover .video-play-btn {
  transform: translate(-50%, -50%) scale(1.15);
  background: var(--color-primary-light);
}
.video-play-btn::after {
  content: '';
  width: 0; height: 0;
  border-left: 18px solid #fff;
  border-top: 12px solid transparent;
  border-bottom: 12px solid transparent;
  margin-left: 4px;
}
.video-duration {
  position: absolute;
  bottom: 1rem; right: 1rem;
  background: rgba(0,0,0,0.7);
  color: #fff;
  padding: 0.2rem 0.6rem;
  border-radius: 4px;
  font-size: 0.75rem;
  z-index: 2;
}
.video-card-body { padding: 1.5rem; }
.video-card-body .v-cat {
  color: var(--color-primary);
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  margin-bottom: 0.5rem;
}
.video-card-body h3 {
  font-family: var(--font-serif);
  font-size: 1.25rem;
  margin-bottom: 0.5rem;
}
.video-card-body p {
  font-size: 0.88rem;
  color: var(--color-text-light);
  line-height: 1.7;
}

/* 客户证言 */
.testimonials {
  padding: 5rem 2rem;
  background: var(--color-paper);
}
.testimonials h2 {
  font-family: var(--font-serif);
  font-size: 2rem;
  text-align: center;
  margin-bottom: 3rem;
}
.testimonial-grid {
  max-width: 1100px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
}
.testimonial-card {
  background: var(--color-cream);
  border-radius: var(--radius-lg);
  padding: 2rem;
  position: relative;
  box-shadow: var(--shadow-sm);
}
.testimonial-card::before {
  content: '"';
  position: absolute;
  top: -0.5rem; left: 1.5rem;
  font-family: var(--font-serif);
  font-size: 5rem;
  color: var(--color-primary);
  opacity: 0.2;
  line-height: 1;
}
.testimonial-card .stars {
  color: var(--color-accent);
  margin-bottom: 1rem;
}
.testimonial-card p {
  font-size: 0.92rem;
  line-height: 1.8;
  color: var(--color-slate);
  margin-bottom: 1.5rem;
  font-style: italic;
}
.testimonial-card .author {
  display: flex;
  align-items: center;
  gap: 0.8rem;
}
.testimonial-card .author-avatar {
  width: 48px; height: 48px;
  border-radius: 50%;
  background: var(--color-primary);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 1.1rem;
}
.testimonial-card .author-info .name {
  font-weight: 600;
  font-size: 0.95rem;
}
.testimonial-card .author-info .role {
  font-size: 0.8rem;
  color: var(--color-text-light);
}

@media (max-width: 1024px) {
  .cases-overview-stats, .cases-overview-cats { grid-template-columns: repeat(2,1fr); }
  .case-gallery-grid, .video-gallery-grid, .testimonial-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 600px) {
  .cases-overview-stats { grid-template-columns: 1fr 1fr; }
  .cases-overview-cats, .case-gallery-grid, .video-gallery-grid, .testimonial-grid { grid-template-columns: 1fr; }
  .cases-banner h1 { font-size: 2rem; }
}