/**
 * cases.css - 客户案例页专属样式
 * 依赖 common.css。引入顺序：common.css → cases.css
 */

/* ─── Hero ────────────────────────────────────────────────────────────────── */
.cases-hero { padding: 72px 0 40px; background: linear-gradient(180deg, #fff 0%, var(--bg) 100%); text-align: center; }
.cases-hero h1 { font-size: 40px; font-weight: 800; margin-bottom: 16px; }
.cases-hero p { font-size: 18px; color: var(--muted); max-width: 640px; margin: 0 auto; }
.stat-row { display: flex; justify-content: center; gap: 48px; margin-top: 40px; flex-wrap: wrap; }
.stat-item { text-align: center; }
.stat-num { font-size: 36px; font-weight: 800; background: var(--gradient); -webkit-background-clip: text; -webkit-text-fill-color: transparent; line-height: 1.2; }
.stat-label { font-size: 14px; color: var(--muted); margin-top: 4px; }

/* ─── 行业筛选 ─────────────────────────────────────────────────────────────── */
.filter-bar { display: flex; justify-content: center; gap: 8px; margin: 0 auto 40px; flex-wrap: wrap; max-width: 900px; padding: 0 var(--site-side-pad, 24px); }
.filter-btn { padding: 8px 18px; border: 1px solid var(--border); background: #fff; color: var(--text-light); border-radius: 999px; cursor: pointer; font-size: 14px; transition: all .15s; }
.filter-btn:hover { border-color: var(--primary); color: var(--primary); }
.filter-btn.active { background: var(--primary); color: #fff; border-color: var(--primary); }

/* ─── 案例卡片 ─────────────────────────────────────────────────────────────── */
.cases-sec { padding: 0 var(--site-side-pad, 24px) 64px; max-width: var(--site-max-width, 1200px); margin: 0 auto; }
.cases-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.case-card { background: #fff; border-radius: var(--radius-lg); box-shadow: var(--shadow); overflow: hidden; cursor: pointer; transition: transform .3s, border-color .3s; display: flex; flex-direction: column; border: 1px solid var(--border-light); position: relative; isolation: isolate; }
.case-card:hover { transform: translateY(-4px); border-color: var(--primary-light); z-index: 10; }
.case-cover { width: 100%; height: 180px; background: var(--gradient-soft); display: flex; align-items: center; justify-content: center; color: var(--primary); overflow: hidden; position: relative; }
.case-cover img { width: 100%; height: 100%; object-fit: cover; display: block; position: relative; z-index: 1; }
.case-cover .cover-text { font-size: 24px; font-weight: 700; padding: 16px; text-align: center; }
.case-body { padding: 24px; flex: 1; display: flex; flex-direction: column; }
.case-industry { display: inline-block; padding: 3px 10px; background: var(--bg-soft); color: var(--primary); font-size: 12px; font-weight: 500; border-radius: 6px; margin-bottom: 12px; align-self: flex-start; }
.case-title { font-size: 17px; font-weight: 700; color: var(--text); line-height: 1.4; margin-bottom: 10px; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.case-summary { font-size: 14px; color: var(--muted); line-height: 1.6; flex: 1; display: -webkit-box; -webkit-line-clamp: 3; -webkit-box-orient: vertical; overflow: hidden; }
.case-footer { display: flex; justify-content: space-between; align-items: center; margin-top: 16px; padding-top: 12px; border-top: 1px solid var(--border-light); font-size: 13px; }
.case-link { color: var(--primary); font-weight: 500; display: flex; align-items: center; gap: 4px; }
.case-link svg { width: 16px; height: 16px; transition: transform .2s; }
.case-card:hover .case-link svg { transform: translateX(4px); }

/* ─── 详情 ─────────────────────────────────────────────────────────────────── */
.case-detail { max-width: 820px; margin: 0 auto; padding: 48px 24px 64px; display: none; }
.case-detail.show { display: block; }
.detail-cta { margin-top: 40px; padding: 32px; background: var(--gradient-soft); border-radius: var(--radius-lg); text-align: center; }
.detail-cta h3 { font-size: 22px; font-weight: 700; margin-bottom: 8px; }
.detail-cta p { color: var(--muted); margin-bottom: 20px; }
.detail-cta-btn { display: inline-block; padding: 12px 32px; background: var(--gradient); color: #fff; border-radius: 999px; font-weight: 600; text-decoration: none; transition: all .2s; }
.detail-cta-btn:hover { transform: translateY(-2px); box-shadow: 0 6px 20px rgba(79,70,229,.3); }

/* ─── 响应式 ─────────────────────────────────────────────────────────────────── */
@media (max-width: 960px) { .cases-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 640px) {
  .cases-grid { grid-template-columns: 1fr; gap: 16px; }
  .cases-hero { padding: 32px 16px 24px; }
  .cases-hero h1 { font-size: 24px; }
  .cases-hero p { font-size: 14px; }
  .stat-row { gap: 16px; flex-wrap: wrap; }
  .stat-num { font-size: 24px; }
  .stat-label { font-size: 12px; }
  .case-body { padding: 16px; }
  .case-title { font-size: 15px; }
  .case-summary { font-size: 13px; -webkit-line-clamp: 2; }
  .cases-sec { padding: 0 16px 40px; }
  .detail-title { font-size: 20px; }
  .case-cover { height: 140px; }
}