/* ============================================
   成功案例页面 - Success Cases
   ============================================ */

/* === Hero === */
.cases-hero {
  padding: 140px 0 80px;
  position: relative;
  overflow: hidden;
}

.cases-hero::before {
  content: '';
  position: absolute;
  top: -200px;
  right: -200px;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle,
    rgba(91, 157, 170, 0.18) 0%,
    rgba(91, 157, 170, 0.08) 40%,
    transparent 70%);
  border-radius: 50%;
  z-index: -1;
}

.cases-hero::after {
  content: '';
  position: absolute;
  bottom: -200px;
  left: -150px;
  width: 500px;
  height: 500px;
  background: radial-gradient(circle,
    rgba(122, 158, 126, 0.14) 0%,
    transparent 70%);
  border-radius: 50%;
  z-index: -1;
}

.cases-hero-content {
  text-align: center;
  max-width: 880px;
  margin: 0 auto;
}

.cases-hero-title {
  font-size: clamp(36px, 5vw, 56px);
  font-weight: var(--weight-bold);
  line-height: 1.15;
  margin: var(--space-6) 0 var(--space-6);
  color: var(--ink-900);
  letter-spacing: -0.02em;
}

/* 与首页 .hero-title .highlight 一致：使用 --gradient-text（同款深青→紫蓝渐变） */
/* 样式定义在 main.css 的 .cases-hero-title .highlight 选择器中 */

.cases-hero-desc {
  font-size: var(--text-h6);
  color: var(--ink-700);
  line-height: var(--leading-relaxed);
  margin: 0 auto var(--space-10);
  max-width: 720px;
}

.cases-hero-stats {
  display: flex;
  justify-content: center;
  gap: var(--space-12);
  padding: var(--space-6) 0;
  flex-wrap: wrap;
}

.cases-hero-stats .hero-stat {
  text-align: center;
}

.cases-hero-stats .hero-stat-number {
  font-family: var(--font-display);
  font-size: 42px;
  font-weight: var(--weight-bold);
  background: linear-gradient(135deg, var(--teal-700) 0%, var(--teal-900) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  line-height: 1;
  margin-bottom: 4px;
}

.cases-hero-stats .hero-stat-label {
  font-size: var(--text-body-sm);
  color: var(--ink-600);
  font-weight: var(--weight-medium);
}

/* === 行业筛选 === */
.cases-filter {
  padding: var(--space-8) 0;
  background: rgba(255, 255, 255, 0.6);
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
  box-shadow: inset 0 -1px 0 rgba(15, 76, 92, 0.06);
  position: sticky;
  top: 72px;
  z-index: 30;
}

.cases-tabs {
  display: flex;
  gap: var(--space-2);
  flex-wrap: wrap;
  justify-content: center;
}

.cases-tab {
  padding: var(--space-3) var(--space-6);
  background: transparent;
  border: none;
  border-radius: var(--radius-full);
  font-family: var(--font-cn);
  font-size: var(--text-body);
  font-weight: var(--weight-medium);
  color: var(--ink-700);
  cursor: pointer;
  transition: all var(--duration-base) var(--ease-smooth);
  box-shadow: inset 0 0 0 1px rgba(15, 76, 92, 0.1);
}

.cases-tab:hover {
  color: var(--teal-900);
  box-shadow:
    inset 0 0 0 1px rgba(91, 157, 170, 0.4),
    0 4px 12px rgba(91, 157, 170, 0.1);
  transform: translateY(-1px);
}

.cases-tab.active {
  background: linear-gradient(135deg, var(--teal-700) 0%, var(--teal-900) 100%);
  color: var(--cloud-dancer);
  box-shadow:
    0 4px 16px rgba(15, 76, 92, 0.25),
    inset 0 1px 0 rgba(255, 255, 255, 0.2);
}

/* === 案例网格 === */
.cases-grid-section {
  padding: var(--space-12) 0 var(--space-16);
}

.cases-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-8);
}

/* === 案例卡片 === */
.case-card {
  background: var(--bg-elev);
  border-radius: var(--radius-2xl);
  overflow: hidden;
  transition: all 0.5s var(--ease-smooth);
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.8),
    0 1px 2px rgba(15, 76, 92, 0.04),
    0 4px 16px rgba(15, 76, 92, 0.06),
    0 0 0 1px rgba(15, 76, 92, 0.05);
  cursor: pointer;
  display: flex;
  flex-direction: column;
  height: 100%;
}

.case-card:hover {
  transform: translateY(-6px);
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.9),
    0 24px 48px -16px rgba(15, 76, 92, 0.18),
    0 0 0 1px rgba(91, 157, 170, 0.2);
}

/* 案例图 */
.case-image {
  position: relative;
  height: 220px;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
}

.case-card-image {
  position: relative;
  aspect-ratio: 16 / 10;
  overflow: hidden;
  background: var(--cream-50, #F8F7F2);
  border-radius: 12px;
}
.case-card-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
  display: block;
}

.case-image-bg {
  position: absolute;
  inset: 0;
  opacity: 0.95;
}

.case-image-city .case-image-bg {
  background: linear-gradient(135deg,
    rgba(91, 157, 170, 0.25) 0%,
    rgba(15, 76, 92, 0.18) 100%);
}

.case-image-rural .case-image-bg {
  background: linear-gradient(135deg,
    rgba(122, 158, 126, 0.25) 0%,
    rgba(91, 130, 95, 0.18) 100%);
}

.case-image-industry .case-image-bg {
  background: linear-gradient(135deg,
    rgba(217, 122, 100, 0.22) 0%,
    rgba(155, 89, 70, 0.16) 100%);
}

.case-image-leak .case-image-bg {
  background: linear-gradient(135deg,
    rgba(91, 91, 214, 0.22) 0%,
    rgba(73, 73, 168, 0.16) 100%);
}

.case-image-bg::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(circle at 30% 30%,
    rgba(255, 255, 255, 0.4) 0%,
    transparent 50%);
  animation: caseShimmer 8s ease-in-out infinite;
}

@keyframes caseShimmer {
  0%, 100% { transform: translate(0, 0) rotate(0deg); }
  50% { transform: translate(10%, 10%) rotate(45deg); }
}

.case-image-icon {
  position: relative;
  z-index: 1;
  width: 80px;
  height: 80px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.case-image-city .case-image-icon { color: var(--teal-900); }
.case-image-rural .case-image-icon { color: var(--sage-700); }
.case-image-industry .case-image-icon { color: var(--coral-700); }
.case-image-leak .case-image-icon { color: var(--indigo-700); }

.case-image-icon svg {
  width: 56px;
  height: 56px;
  filter: drop-shadow(0 4px 12px rgba(15, 76, 92, 0.15));
  transition: transform 0.5s var(--ease-spring);
}

.case-card:hover .case-image-icon svg {
  transform: scale(1.1) rotate(-5deg);
}

.case-badge {
  position: absolute;
  top: var(--space-4);
  left: var(--space-4);
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 12px;
  background: rgba(255, 255, 255, 0.85);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
  border-radius: var(--radius-full);
  font-size: 12px;
  font-weight: var(--weight-bold);
  color: var(--ink-800);
  box-shadow: 0 2px 8px rgba(15, 76, 92, 0.1);
  z-index: 2;
}

.case-badge .badge-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--teal-600);
}

.case-image-city .case-badge .badge-dot { background: var(--teal-700); }
.case-image-rural .case-badge .badge-dot { background: var(--sage-700); }
.case-image-industry .case-badge .badge-dot { background: var(--coral-700); }
.case-image-leak .case-badge .badge-dot { background: var(--indigo-700); }

/* === 案例内容 === */
.case-content {
  padding: var(--space-6) var(--space-6) var(--space-6);
  display: flex;
  flex-direction: column;
  flex: 1;
}

.case-meta {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-size: 12px;
  color: var(--ink-500);
  margin-bottom: var(--space-3);
}

.case-region {
  font-weight: var(--weight-medium);
}

.case-year {
  padding: 2px 8px;
  background: rgba(91, 157, 170, 0.1);
  border-radius: var(--radius-sm);
  color: var(--teal-700);
  font-weight: var(--weight-bold);
}

.case-title {
  font-size: var(--text-h5);
  font-weight: var(--weight-bold);
  color: var(--ink-900);
  margin: 0 0 var(--space-3);
  line-height: 1.4;
}

.case-desc {
  font-size: var(--text-body-sm);
  color: var(--ink-700);
  line-height: var(--leading-relaxed);
  margin: 0 0 var(--space-5);
}

.case-metrics {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-3);
  padding: var(--space-4);
  background: linear-gradient(135deg,
    rgba(91, 157, 170, 0.06) 0%,
    rgba(122, 158, 126, 0.06) 100%);
  border-radius: var(--radius-lg);
  border: 1px solid rgba(15, 76, 92, 0.06);
}

.case-metric {
  text-align: center;
}

.case-metric-num {
  display: block;
  font-family: var(--font-display);
  font-size: var(--text-h5);
  font-weight: var(--weight-bold);
  background: linear-gradient(135deg, var(--teal-700) 0%, var(--teal-900) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  line-height: 1;
  margin-bottom: 4px;
}

.case-metric-label {
  display: block;
  font-size: 11px;
  color: var(--ink-600);
  font-weight: var(--weight-medium);
  letter-spacing: 0.02em;
}

/* 案例结果 - 关键指标 */
.case-results {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-3);
  padding: var(--space-4);
  background: linear-gradient(135deg, rgba(91, 157, 170, 0.06) 0%, rgba(91, 91, 214, 0.04) 100%);
  border-radius: var(--radius-lg, 12px);
  margin-bottom: var(--space-5);
  border: 1px solid rgba(91, 157, 170, 0.12);
}
.case-result {
  display: flex;
  flex-direction: column;
  gap: 4px;
  text-align: center;
}
.case-result-value {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--teal-700, #0F4C5C);
  line-height: 1.2;
  font-family: var(--font-display, inherit);
}
.case-result-label {
  font-size: 0.75rem;
  color: var(--ink-600, #5a5a5a);
  font-weight: 500;
}

/* 案例卡片底部链接 */
.case-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-top: auto;
  padding: 10px 18px;
  background: rgba(91, 157, 170, 0.08);
  border: 1px solid rgba(91, 157, 170, 0.25);
  border-radius: var(--radius-full, 999px);
  color: var(--teal-700, #0F4C5C);
  font-size: 0.875rem;
  font-weight: 600;
  text-decoration: none;
  transition: all 0.2s var(--ease-smooth, ease);
  align-self: flex-start;
}
.case-link svg {
  width: 14px;
  height: 14px;
  transition: transform 0.2s var(--ease-smooth, ease);
}
.case-link:hover {
  background: linear-gradient(135deg, var(--teal-700, #0F4C5C) 0%, var(--teal-900, #0a3a48) 100%);
  border-color: transparent;
  color: #fff;
  transform: translateX(2px);
  box-shadow: 0 4px 14px -4px rgba(15, 76, 92, 0.3);
}
.case-link:hover svg {
  transform: translateX(3px);
}

/* === 客户证言 === */
.cases-testimonials {
  padding: var(--space-16) 0;
  background: linear-gradient(180deg,
    rgba(248, 247, 242, 0.5) 0%,
    rgba(255, 255, 255, 0.8) 100%);
  position: relative;
}

.section-header {
  text-align: center;
  max-width: 700px;
  margin: 0 auto var(--space-12);
}

.section-title {
  font-size: clamp(28px, 4vw, 42px);
  font-weight: var(--weight-bold);
  color: var(--ink-900);
  margin: var(--space-4) 0 var(--space-3);
  letter-spacing: -0.01em;
}

.section-desc {
  font-size: var(--text-h6);
  color: var(--ink-700);
  line-height: var(--leading-relaxed);
}

.testimonial-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-6);
}

.testimonial-card {
  position: relative;
  padding: var(--space-8) var(--space-6) var(--space-6);
  background: var(--bg-elev);
  border-radius: var(--radius-xl);
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.8),
    0 1px 2px rgba(15, 76, 92, 0.04),
    0 8px 24px rgba(15, 76, 92, 0.06),
    0 0 0 1px rgba(15, 76, 92, 0.05);
  transition: transform 0.3s var(--ease-smooth);
}

.testimonial-card:hover {
  transform: translateY(-4px);
}

.testimonial-quote-mark {
  position: absolute;
  top: 8px;
  left: 16px;
  font-family: var(--font-display);
  font-size: 80px;
  font-weight: var(--weight-bold);
  line-height: 1;
  background: linear-gradient(135deg,
    var(--teal-600) 0%,
    var(--teal-800) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  opacity: 0.2;
  pointer-events: none;
}

.testimonial-text {
  position: relative;
  font-size: var(--text-body);
  color: var(--ink-700);
  line-height: var(--leading-relaxed);
  margin: 0 0 var(--space-5);
  font-style: italic;
}

.testimonial-author {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding-top: var(--space-4);
  border-top: 1px solid rgba(15, 76, 92, 0.06);
}

.author-avatar {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--teal-700) 0%, var(--sage-700) 100%);
  color: white;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  font-weight: var(--weight-bold);
  box-shadow: 0 2px 8px rgba(15, 76, 92, 0.15);
}

.author-name {
  font-size: var(--text-body);
  font-weight: var(--weight-bold);
  color: var(--ink-900);
}

.author-role {
  font-size: 12px;
  color: var(--ink-600);
}

/* === 隐藏（被 filter 排除的案例） === */
.case-card.hidden {
  display: none;
}

/* === 响应式 === */
@media (max-width: 1024px) {
  .cases-grid {
    grid-template-columns: 1fr;
  }

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

@media (max-width: 768px) {
  .cases-hero {
    padding: 120px 0 60px;
  }

  .cases-hero-stats {
    gap: var(--space-6);
  }

  .case-image {
    height: 180px;
  }

  .case-metrics {
    grid-template-columns: 1fr;
  }
}