/* ── 典型案例页专属样式 ── */

/* 筛选标签 */
.filter-bar {
  display: flex; gap: 8px; flex-wrap: wrap; margin-bottom: 48px;
}
.filter-btn {
  padding: 7px 18px;
  font-size: 12px; font-weight: 600; letter-spacing: 1px;
  border: 1px solid var(--border-hi);
  color: var(--text-md); background: none; cursor: pointer;
  transition: all 0.2s; font-family: var(--font-cn);
}
.filter-btn:hover, .filter-btn.active {
  background: rgba(14,165,233,0.1);
  border-color: var(--brand); color: var(--brand);
}

/* 案例卡片网格 */
.cases-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.case-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  overflow: hidden;
  transition: all 0.35s;
  display: flex; flex-direction: column;
}
.case-card:hover {
  border-color: var(--border-hi);
  box-shadow: 0 20px 60px rgba(0,0,0,0.4);
  transform: translateY(-6px);
}
.case-card-header {
  padding: 28px 28px 20px;
  border-bottom: 1px solid var(--line);
  position: relative;
}
.case-card-header::before {
  content: '';
  position: absolute; top: 0; left: 0; right: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--brand), var(--cyan));
}
.case-industry {
  font-size: 10px; font-weight: 700; letter-spacing: 3px;
  text-transform: uppercase; color: var(--text-lo);
  font-family: var(--font-en); margin-bottom: 10px;
  display: flex; align-items: center; gap: 8px;
}
.case-industry-dot {
  width: 6px; height: 6px; border-radius: 50%;
  background: var(--brand);
}
.case-title {
  font-size: 17px; font-weight: 700; color: var(--text-hi);
  margin-bottom: 8px; line-height: 1.3;
}
.case-client {
  font-size: 12px; color: var(--text-lo);
  display: flex; align-items: center; gap: 6px;
}
.case-client::before { content: '🏢'; font-size: 12px; }
.case-card-body {
  padding: 20px 28px;
  flex: 1;
}
.case-challenge-label {
  font-size: 10px; font-weight: 700; letter-spacing: 2px;
  text-transform: uppercase; color: var(--red);
  font-family: var(--font-en); margin-bottom: 8px;
  display: flex; align-items: center; gap: 6px;
}
.case-challenge-label::before { content: '!'; font-size: 12px; }
.case-challenge { font-size: 13px; color: var(--text-md); line-height: 1.7; margin-bottom: 16px; }
.case-solution-label {
  font-size: 10px; font-weight: 700; letter-spacing: 2px;
  text-transform: uppercase; color: var(--green);
  font-family: var(--font-en); margin-bottom: 8px;
  display: flex; align-items: center; gap: 6px;
}
.case-solution-label::before { content: '✓'; font-size: 12px; }
.case-solution { font-size: 13px; color: var(--text-md); line-height: 1.7; }
.case-card-footer {
  padding: 20px 28px;
  border-top: 1px solid var(--line);
  display: flex; gap: 16px; flex-wrap: wrap;
}
.case-metric {
  display: flex; flex-direction: column; gap: 2px;
}
.case-metric-val {
  font-family: var(--font-en);
  font-size: 22px; font-weight: 700;
  color: var(--brand); line-height: 1;
}
.case-metric-label {
  font-size: 10px; color: var(--text-lo); letter-spacing: 0.5px;
}

/* 特色大案例 */
.featured-case {
  background: var(--bg-card);
  border: 1px solid var(--border-hi);
  overflow: hidden;
  position: relative;
  margin-bottom: 32px;
}
.featured-case::before {
  content: '';
  position: absolute; top: 0; left: 0; right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--brand), var(--cyan), var(--brand));
}
.featured-case-inner {
  display: grid; grid-template-columns: 1fr 1fr;
  gap: 0;
}
.featured-case-left {
  padding: 48px;
  border-right: 1px solid var(--line);
}
.featured-case-right {
  padding: 48px;
  display: flex; flex-direction: column; justify-content: space-between;
}
.featured-tag {
  display: inline-flex; align-items: center; gap: 6px;
  font-size: 9px; font-weight: 700; letter-spacing: 3px;
  text-transform: uppercase; font-family: var(--font-en);
  color: var(--gold); border: 1px solid rgba(245,158,11,0.3);
  padding: 5px 14px; margin-bottom: 20px;
  background: rgba(245,158,11,0.08);
}
.featured-tag::before { content: '★'; }
.featured-case-title {
  font-family: var(--font-serif);
  font-size: clamp(20px, 2.5vw, 30px);
  font-weight: 700; color: var(--text-hi);
  line-height: 1.3; margin-bottom: 12px;
}
.featured-case-client {
  font-size: 13px; color: var(--text-lo); margin-bottom: 20px;
}
.featured-case-desc { font-size: 14px; color: var(--text-md); line-height: 1.8; }
.featured-metrics {
  display: grid; grid-template-columns: repeat(3, 1fr);
  gap: 16px; margin-bottom: 24px;
}
.featured-metric {
  background: var(--bg-raised);
  border: 1px solid var(--border);
  padding: 20px 16px; text-align: center;
}
.featured-metric-val {
  font-family: var(--font-en);
  font-size: 32px; font-weight: 700;
  color: var(--brand); line-height: 1;
  display: block; margin-bottom: 6px;
}
.featured-metric-label { font-size: 11px; color: var(--text-lo); letter-spacing: 0.5px; }
.featured-timeline {
  list-style: none; display: flex; flex-direction: column; gap: 10px;
}
.featured-timeline li {
  display: flex; gap: 12px; align-items: flex-start;
  font-size: 13px; color: var(--text-md); line-height: 1.6;
}
.tl-badge {
  font-size: 9px; font-weight: 700; letter-spacing: 1px;
  font-family: var(--font-en); padding: 3px 8px;
  background: rgba(14,165,233,0.12); color: var(--brand);
  border: 1px solid rgba(14,165,233,0.25);
  flex-shrink: 0; white-space: nowrap;
}

/* 客户评价 */
.testimonials {
  display: grid; grid-template-columns: 1fr 1fr;
  gap: 24px;
}
.testimonial {
  background: var(--bg-card);
  border: 1px solid var(--border);
  padding: 32px;
  position: relative;
  transition: all 0.3s;
}
.testimonial::before {
  content: '"';
  position: absolute; top: 16px; right: 20px;
  font-family: Georgia, serif; font-size: 80px; line-height: 1;
  color: var(--border-hi); pointer-events: none;
}
.testimonial:hover {
  border-color: var(--border-hi);
  box-shadow: 0 12px 40px rgba(0,0,0,0.25);
}
.testimonial-content {
  font-size: 14px; color: var(--text-md); line-height: 1.8;
  font-style: italic; margin-bottom: 20px;
}
.testimonial-author {
  display: flex; align-items: center; gap: 14px;
}
.testimonial-avatar {
  width: 42px; height: 42px;
  background: linear-gradient(135deg, var(--brand), var(--cyan));
  clip-path: polygon(0 0, 85% 0, 100% 15%, 100% 100%, 0 100%);
  display: flex; align-items: center; justify-content: center;
  font-size: 16px; font-weight: 700; color: white;
  font-family: var(--font-cn);
}
.testimonial-name { font-size: 14px; font-weight: 700; color: var(--text-hi); }
.testimonial-role { font-size: 11px; color: var(--text-lo); margin-top: 2px; }

@media (max-width: 1100px) {
  .cases-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 900px) {
  .cases-grid { grid-template-columns: 1fr; }
  .featured-case-inner { grid-template-columns: 1fr; }
  .featured-case-left { border-right: none; border-bottom: 1px solid var(--line); }
  .testimonials { grid-template-columns: 1fr; }
  .featured-metrics { grid-template-columns: 1fr 1fr; }
  .featured-case-left,
  .featured-case-right { padding: 32px 28px; }
}
@media (max-width: 600px) {
  .featured-metrics { grid-template-columns: repeat(3, 1fr); }
  .filter-bar { gap: 6px; }
  .filter-btn { padding: 6px 12px; font-size: 11px; }
  .case-card-header { padding: 20px 20px 16px; }
  .case-card-body { padding: 16px 20px; }
  .case-card-footer { padding: 14px 20px; }
  .testimonial { padding: 24px 20px; }
  .testimonial::before { font-size: 60px; top: 10px; right: 14px; }
  .featured-case-left,
  .featured-case-right { padding: 24px 20px; }
}