/* ============================================
   cases.css — 案例页面专属样式（3案例平铺）
   ============================================ */

/* ════════════════════════════════════════════
   页面 Hero 头部
   ════════════════════════════════════════════ */
.cd-page-hero {
  position: relative;
  padding: 140px 0 80px;
  background: #0A0E1A;
  overflow: hidden;
  text-align: center;
}
.cd-page-hero-bg {
  position: absolute; inset: 0; pointer-events: none;
}
.cd-page-hero-grid {
  position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(67,100,247,0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(67,100,247,0.05) 1px, transparent 1px);
  background-size: 60px 60px;
}
.cd-page-hero-glow {
  position: absolute;
  width: 500px; height: 500px;
  top: -200px; left: 50%; transform: translateX(-50%);
  background: radial-gradient(circle, rgba(67,100,247,0.2) 0%, transparent 70%);
  filter: blur(60px);
}
.cd-page-hero-bgimg {
  position: absolute;
  inset: 0;
  width: 100%; height: 100%;
  object-fit: cover;
  opacity: 0.15;
}
.cd-page-hero-inner {
  position: relative; z-index: 1;
}
.cd-page-hero-tag {
  display: inline-flex;
  align-items: center; gap: 8px;
  padding: 6px 18px;
  border-radius: 999px;
  background: rgba(67,100,247,0.15);
  border: 1px solid rgba(67,100,247,0.3);
  font-size: 0.85rem;
  color: #6FB1FC;
  margin-bottom: 20px;
}
.cd-page-hero-tag-dot {
  width: 6px; height: 6px; border-radius: 50%;
  background: #6FB1FC;
  box-shadow: 0 0 8px #6FB1FC;
  animation: cdPulse 2s ease-in-out infinite;
}
@keyframes cdPulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(0.7); }
}
.cd-page-hero-title {
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 800;
  color: #fff;
  line-height: 1.3;
  margin-bottom: 16px;
}
.cd-page-hero-subtitle {
  font-size: clamp(1rem, 2vw, 1.2rem);
  color: rgba(255,255,255,0.55);
  line-height: 1.6;
  max-width: 640px;
  margin: 0 auto;
}

/* ════════════════════════════════════════════
   案例容器（浅色/深色交替）
   ════════════════════════════════════════════ */
.cd-case {
  position: relative;
  padding: var(--spacing-16) 0;
  background: var(--color-bg);
  overflow: hidden;
}
.cd-case--dark {
  background: #0A0E1A;
}
/* 深色案例 — 背景网格装饰 */
.cd-case--dark::before {
  content: '';
  position: absolute; inset: 0; pointer-events: none;
  background-image:
    linear-gradient(rgba(67,100,247,0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(67,100,247,0.04) 1px, transparent 1px);
  background-size: 60px 60px;
}
/* 案例间渐变分割线 */
.cd-case + .cd-case::after {
  content: '';
  position: absolute; top: 0; left: 10%; right: 10%;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(67,100,247,0.3), transparent);
}
.cd-case--dark + .cd-case::after,
.cd-case + .cd-case--dark::after {
  display: none;
}

/* ════════════════════════════════════════════
   案例标题 + 项目背景
   ════════════════════════════════════════════ */
.cd-hero {
  margin-bottom: var(--spacing-10);
  position: relative;
}
.cd-num {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 700;
  color: #fff;
  letter-spacing: 0.1em;
  padding: 4px 14px;
  border-radius: 999px;
  background: linear-gradient(135deg, #0052D4, #4364F7);
  margin-bottom: var(--spacing-2);
}
.cd-title {
  font-size: clamp(1.3rem, 2.8vw, 1.85rem);
  font-weight: 700;
  color: var(--color-text-primary);
  line-height: 1.4;
  margin-bottom: var(--spacing-6);
  padding-left: 16px;
  border-left: 4px solid;
  border-image: linear-gradient(180deg, #0052D4, #6FB1FC) 1;
}
.cd-case--dark .cd-title {
  color: #fff;
}

.cd-bg-block {
  background: var(--color-bg-alt);
  border: 1px solid rgba(67,100,247,0.12);
  border-radius: var(--radius-lg);
  padding: var(--spacing-5) var(--spacing-6);
  position: relative;
  overflow: hidden;
}
.cd-bg-block::before {
  content: '';
  position: absolute; top: 0; left: 0; bottom: 0; width: 3px;
  background: linear-gradient(180deg, #0052D4, #6FB1FC);
}
.cd-case--dark .cd-bg-block {
  background: rgba(88,126,230,0.06);
  border-color: rgba(88,126,230,0.2);
}
.cd-bg-label {
  font-size: var(--font-size-base);
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: var(--spacing-2);
}
.cd-bg-text {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  line-height: 1.8;
}
.cd-case--dark .cd-bg-text {
  color: rgba(255,255,255,0.65);
}

/* ════════════════════════════════════════════
   三栏布局
   ════════════════════════════════════════════ */
.cd-columns {
  display: grid;
  grid-template-columns: 1fr 1.2fr 1fr;
  gap: var(--spacing-6);
  align-items: stretch;
}

/* 栏容器 — 卡片化 */
.cd-col {
  display: flex;
  flex-direction: column;
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--spacing-5);
  transition: box-shadow 0.3s, border-color 0.3s;
}
.cd-col:hover {
  box-shadow: 0 4px 20px rgba(0,0,0,0.06);
  border-color: rgba(67,100,247,0.2);
}
.cd-case--dark .cd-col {
  background: rgba(255,255,255,0.04);
  border-color: rgba(88,126,230,0.25);
}
.cd-case--dark .cd-col:hover {
  box-shadow: 0 4px 24px rgba(67,100,247,0.15);
  border-color: rgba(88,126,230,0.45);
}

.cd-col-title {
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--color-text-primary);
  margin-bottom: var(--spacing-4);
  padding-bottom: var(--spacing-2);
  border-bottom: 2px solid var(--color-primary);
  display: flex;
  align-items: center;
  gap: 8px;
}
.cd-case--dark .cd-col-title {
  color: #fff;
  border-bottom-color: rgba(88,126,230,0.5);
}

/* ════════════════════════════════════════════
   表格通用
   ════════════════════════════════════════════ */
.cd-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.78rem;
  line-height: 1.6;
}
.cd-table th {
  text-align: left;
  font-weight: 600;
  font-size: 0.72rem;
  padding: 8px 10px;
  border-bottom: 2px solid var(--color-border);
  color: var(--color-text-secondary);
  letter-spacing: 0.03em;
}
.cd-case--dark .cd-table th {
  color: rgba(255,255,255,0.5);
  border-bottom-color: rgba(255,255,255,0.12);
}
.cd-table td {
  padding: 8px 10px;
  border-bottom: 1px solid var(--color-border);
  color: var(--color-text-secondary);
  vertical-align: top;
}
.cd-case--dark .cd-table td {
  color: rgba(255,255,255,0.65);
  border-bottom-color: rgba(255,255,255,0.06);
}
.cd-table tbody tr {
  transition: background 0.2s;
}
.cd-table tbody tr:hover {
  background: rgba(67,100,247,0.04);
}
.cd-case--dark .cd-table tbody tr:hover {
  background: rgba(67,100,247,0.08);
}

/* 斑马纹 */
.cd-table tbody tr:nth-child(even) {
  background: rgba(0,0,0,0.015);
}
.cd-case--dark .cd-table tbody tr:nth-child(even) {
  background: rgba(255,255,255,0.02);
}

/* 指标值高亮 */
.cd-val {
  font-weight: 800;
  color: var(--color-primary) !important;
  white-space: nowrap;
  font-size: 0.88rem;
  letter-spacing: 0.01em;
}

/* 痛点表格 — AI诊断列蓝色高亮 */
.cd-table--pain td:nth-child(2) {
  color: var(--color-primary);
  font-weight: 500;
}
.cd-case--dark .cd-table--pain td:nth-child(2) {
  color: #6FB1FC;
}

/* ════════════════════════════════════════════
   AI 解决方案 Agent 卡片
   ════════════════════════════════════════════ */
.cd-agent {
  margin-bottom: var(--spacing-4);
  padding: var(--spacing-4);
  border-radius: var(--radius-md);
  border: 1px solid transparent;
  transition: background 0.25s, border-color 0.25s, transform 0.25s;
}
.cd-agent:last-child {
  margin-bottom: 0;
}
.cd-agent:hover {
  background: rgba(67,100,247,0.04);
  border-color: rgba(67,100,247,0.15);
  transform: translateX(4px);
}
.cd-case--dark .cd-agent:hover {
  background: rgba(67,100,247,0.08);
  border-color: rgba(88,126,230,0.25);
}

.cd-agent-title {
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--color-text-primary);
  margin-bottom: var(--spacing-1);
  line-height: 1.4;
  position: relative;
  padding-left: 16px;
}
.cd-agent-title::before {
  content: '';
  position: absolute;
  left: 0; top: 6px;
  width: 7px; height: 7px;
  border-radius: 50%;
  background: linear-gradient(135deg, #0052D4, #6FB1FC);
  box-shadow: 0 0 6px rgba(67,100,247,0.4);
}
.cd-case--dark .cd-agent-title {
  color: #fff;
}

.cd-agent-desc {
  font-size: 0.75rem;
  color: var(--color-text-secondary);
  line-height: 1.7;
  padding-left: 16px;
}
.cd-case--dark .cd-agent-desc {
  color: rgba(255,255,255,0.55);
}

/* ════════════════════════════════════════════
   响应式
   ════════════════════════════════════════════ */
@media (max-width: 1024px) {
  .cd-columns {
    grid-template-columns: 1fr 1fr;
  }
  .cd-col--solution {
    grid-column: 1 / -1;
  }
}

@media (max-width: 768px) {
  .cd-case {
    padding: var(--spacing-10) 0;
  }
  .cd-page-hero {
    padding: 120px 0 60px;
  }
  .cd-columns {
    grid-template-columns: 1fr;
  }
  .cd-col--solution {
    grid-column: auto;
  }
  .cd-title {
    font-size: 1.15rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .cd-page-hero-tag-dot { animation: none; }
  .cd-agent:hover { transform: none; }
}