/* ============================================================
   案例列表页 + 案例详情页 · 专属样式
   依赖 site.css 设计令牌；与 site.css 重名的选择器一律以
   .cases-section / .sec / .case-* 页面级作用域覆盖，不重复声明。
   ============================================================ */

/* ============ 子页页头（列表页） ============ */
.page-hero {
  position: relative; overflow: hidden;
  padding: 88px 0 72px;
  background:
    radial-gradient(900px 380px at 15% -20%, rgba(168, 50, 45, .05), transparent 55%),
    radial-gradient(900px 380px at 85% -20%, rgba(46, 71, 86, .07), transparent 60%),
    var(--paper);
}
.page-hero .eyebrow {
  display: inline-flex; align-items: center; gap: 10px;
  font-size: 13px; letter-spacing: .3em; color: var(--ink-50); margin-bottom: 22px;
}
.page-hero .eyebrow::before { content: ""; width: 36px; height: 1px; background: var(--faint); }
.page-hero h1 {
  font-family: var(--serif); font-weight: 900;
  font-size: clamp(34px, 5vw, 52px); letter-spacing: .05em;
  line-height: 1.3; margin-bottom: 20px;
}
.page-hero h1 em { font-style: normal; color: var(--cinnabar); }
.page-hero .lede { font-size: 16.5px; color: var(--ink-70); max-width: 620px; }
.page-hero .hero-no {
  position: absolute; right: 6%; top: 44px;
  font-family: "Zhi Mang Xing", var(--serif); font-weight: 400; font-size: 190px; line-height: 1;
  color: rgba(168, 50, 45, .09); pointer-events: none;
}
.page-hero .mountains { position: absolute; left: 0; right: 0; bottom: -4px; pointer-events: none; }
.page-hero .mountains svg { display: block; width: 100%; height: 120px; }

/* ============ 服务线筛选条 ============ */
.case-filter {
  position: sticky; top: 77px; z-index: 40;
  background: rgba(247, 244, 237, .95); backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--faint);
  box-shadow: 0 10px 24px -18px rgba(28, 28, 28, .35);
}
.filter-inner {
  display: flex; gap: 8px; max-width: var(--container);
  margin: 0 auto; padding: 14px 32px; overflow-x: auto;
}
.filter-pill {
  flex: none; display: inline-flex; align-items: baseline; gap: 8px;
  padding: 8px 18px; border: 1px solid var(--faint); border-radius: 2px;
  font-size: 14px; color: var(--ink-70); background: transparent;
  transition: border-color .2s, color .2s, background-color .2s;
}
.filter-pill b { font-family: var(--serif); color: var(--ink-50); font-weight: 600; }
.filter-pill:hover { border-color: var(--cinnabar); color: var(--ink); }
.filter-pill:hover b { color: var(--cinnabar); }
.filter-pill.active { background: var(--ink); border-color: var(--ink); color: var(--paper); }
.filter-pill.active b { color: #E8B4B0; }

/* ============ 案例网格（列表页 · 浅色纸面卡片） ============ */
.cases-section { padding: 72px 0 96px; }
.cases-section .cases-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 32px; }
.cases-section .case-card {
  position: relative;
  background: var(--paper-2); border: 1px solid var(--faint); border-radius: 4px;
  overflow: hidden; display: flex; flex-direction: column;
  transition: border-color .25s, transform .25s var(--ease), box-shadow .25s;
}
.card-link { position: absolute; inset: 0; z-index: 2; }
.cases-section .case-card:hover {
  border-color: var(--cinnabar); transform: translateY(-6px);
  box-shadow: 0 20px 44px -24px rgba(28, 28, 28, .3);
}
.cases-section .case-cover-link { display: block; position: relative; background: #242424; }
.cases-section .case-art { aspect-ratio: 21 / 9; }
.case-line-badge {
  position: absolute; top: 14px; left: 14px; z-index: 2;
  background: rgba(28, 28, 28, .82); color: var(--paper);
  font-size: 12px; letter-spacing: .18em; padding: 4px 12px; border-radius: 2px;
}
.cases-section .case-body { padding: 26px 26px 24px; display: flex; flex-direction: column; gap: 10px; flex: 1; }
.case-meta {
  display: flex; align-items: center; gap: 14px;
  font-size: 12.5px; color: var(--ink-50); letter-spacing: .08em;
}
.cases-section .case-body h2 {
  font-family: var(--serif); font-size: 21px; font-weight: 700;
  letter-spacing: .02em; line-height: 1.45;
}
.cases-section .case-card:hover h2 { color: var(--cinnabar-dark); }
.case-summary { font-size: 15px; color: var(--ink-70); flex: 1; }
.case-foot {
  display: flex; align-items: flex-end; justify-content: space-between; gap: 16px;
  margin-top: 8px; padding-top: 16px; border-top: 1px dashed var(--faint);
}
.case-foot .case-metrics { display: flex; gap: 26px; margin-top: 0; }
.case-foot .case-metric b {
  font-family: var(--serif); font-size: 23px; font-weight: 700; color: var(--cinnabar);
  font-variant-numeric: tabular-nums; display: block; line-height: 1.2;
}
.case-foot .case-metric span { font-size: 12px; color: var(--ink-50); letter-spacing: .08em; }
.case-more {
  font-size: 13.5px; letter-spacing: .2em; color: var(--ink-70);
  display: inline-flex; align-items: center; gap: 6px; white-space: nowrap;
}
.cases-section .case-card:hover .case-more { color: var(--cinnabar); }
.case-more .arrow { transition: transform .25s var(--ease); display: inline-block; }
.cases-section .case-card:hover .case-more .arrow { transform: translateX(5px); }

/* ============ 空状态 / 分页 ============ */
.cases-empty { text-align: center; padding: 72px 0 32px; }
.cases-empty .empty-mark {
  display: block; font-family: "Zhi Mang Xing", var(--serif); font-weight: 400;
  font-size: 110px; line-height: 1; color: rgba(28, 28, 28, .08);
}
.cases-empty h2 { font-family: var(--serif); font-size: 26px; letter-spacing: .06em; margin-bottom: 12px; }
.cases-empty p { color: var(--ink-50); margin-bottom: 28px; }

.pager { display: flex; justify-content: center; align-items: center; gap: 10px; margin-top: 56px; flex-wrap: wrap; }
.pager a, .pager span {
  min-width: 40px; height: 40px; display: inline-flex; align-items: center; justify-content: center;
  border: 1px solid var(--faint); border-radius: 2px; font-size: 14px; color: var(--ink-70);
  font-variant-numeric: tabular-nums; transition: border-color .2s, color .2s; padding: 0 12px;
}
.pager a:hover { border-color: var(--cinnabar); color: var(--cinnabar); }
.pager .cur { background: var(--ink); border-color: var(--ink); color: var(--paper); }
.pager .gap { border: none; color: var(--ink-50); }

/* ============ 子页 CTA（浅色横幅） ============ */
.sub-cta {
  position: relative; overflow: hidden; padding: 100px 0;
  background: var(--paper-2); border-top: 1px solid var(--faint-2);
}
.sub-cta-inner {
  position: relative; z-index: 2; display: flex; flex-direction: column;
  align-items: center; text-align: center; gap: 18px;
}
.sub-cta-inner::before {
  content: "行胜于言"; position: absolute; top: 50%; left: 50%; transform: translate(-50%, -50%);
  font-family: "Ma Shan Zheng", var(--serif); font-weight: 400; font-size: 150px;
  color: rgba(28, 28, 28, .045); letter-spacing: .2em; white-space: nowrap; pointer-events: none;
}
.sub-cta h2 { font-family: var(--serif); font-size: clamp(28px, 4vw, 40px); font-weight: 900; letter-spacing: .06em; }
.sub-cta p { color: var(--ink-70); font-size: 16px; max-width: 520px; }

/* ============ 详情页头 ============ */
.case-hero {
  position: relative; padding: 56px 0 0;
  background: radial-gradient(800px 320px at 90% -30%, rgba(46, 71, 86, .06), transparent 60%), var(--paper);
}
.crumbs {
  font-size: 13px; color: var(--ink-50); letter-spacing: .05em; margin-bottom: 28px;
  display: flex; align-items: center; gap: 8px; flex-wrap: wrap;
}
.crumbs a:hover { color: var(--cinnabar); }
.crumbs .sep { opacity: .5; }
.case-hero h1 {
  font-family: var(--serif); font-weight: 900;
  font-size: clamp(30px, 4.4vw, 46px); letter-spacing: .03em;
  line-height: 1.35; max-width: 820px;
}
.case-hero-tags { display: flex; align-items: center; gap: 10px; margin: 20px 0 24px; flex-wrap: wrap; }
.tag-line {
  background: var(--ink); color: var(--paper);
  font-size: 12.5px; letter-spacing: .18em; padding: 5px 14px; border-radius: 2px;
}
.tag-plain {
  border: 1px solid var(--faint); color: var(--ink-70);
  font-size: 12.5px; letter-spacing: .08em; padding: 4px 14px; border-radius: 2px;
}
.case-hero .lede { font-size: 16.5px; color: var(--ink-70); max-width: 760px; margin-bottom: 40px; }
.case-cover-wrap { border-top: 1px solid var(--faint); }
.case-cover-wrap .case-art { aspect-ratio: auto; height: 340px; }

/* ============ 详情正文布局 ============ */
.case-body-layout {
  display: grid; grid-template-columns: minmax(0, 1fr) 300px; gap: 56px;
  padding: 72px 0 88px; align-items: start;
}
.case-content { min-width: 0; }

.sec { padding: 0; margin-bottom: 64px; scroll-margin-top: 96px; }
.sec .sec-head { display: flex; align-items: baseline; gap: 18px; margin-bottom: 26px; }
.sec .sec-head h2 { font-family: var(--serif); font-size: 27px; font-weight: 700; letter-spacing: .06em; }
.sec-head .en { font-size: 12px; letter-spacing: .3em; color: var(--ink-50); }
.sec-no {
  font-family: "Zhi Mang Xing", var(--serif); font-weight: 400; font-size: 60px; line-height: 1;
  color: var(--cinnabar); opacity: .92; transform: translateY(6px);
}
.sec p { color: var(--ink-70); font-size: 15.5px; margin-bottom: 14px; max-width: 700px; }
.sec:last-child { margin-bottom: 0; }

/* 壹 背景与挑战：痛点列表 */
.pain-list { list-style: none; display: flex; flex-direction: column; gap: 14px; margin: 22px 0 8px; }
.pain-list li {
  display: flex; gap: 14px; align-items: flex-start;
  background: var(--paper-2); border: 1px solid var(--faint-2); border-left: 3px solid var(--indigo);
  padding: 16px 20px; border-radius: 2px;
}
.pain-list .no { font-family: var(--serif); font-weight: 700; color: var(--indigo); font-size: 15px; min-width: 26px; line-height: 1.8; }
.pain-list li p { font-size: 15.5px; color: var(--ink-70); margin: 0; line-height: 1.8; }

/* 贰 解决方案：要点卡 */
.sol-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; margin-top: 22px; }
.sol-item {
  background: var(--paper-2); border: 1px solid var(--faint); border-radius: 4px;
  padding: 22px 22px 18px; transition: border-color .2s, transform .2s var(--ease);
}
.sol-item:hover { border-color: var(--cinnabar); transform: translateY(-3px); }
.sol-item p { font-size: 15.5px; color: var(--ink-70); margin: 0; display: flex; align-items: baseline; gap: 10px; }
.sol-item p::before {
  content: ""; width: 8px; height: 8px; background: var(--cinnabar);
  border-radius: 50%; flex: none; transform: translateY(-1px);
}

/* 叁 交付成果：指标卡（数值按长度分档，保证单行） */
.result-metrics { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; margin: 24px 0 26px; }
.metric-card { background: var(--ink); color: var(--paper); border-radius: 4px; padding: 24px 20px 20px; text-align: center; }
.metric-card b {
  font-family: var(--serif); font-size: 40px; font-weight: 900; color: #E8B4B0;
  display: block; line-height: 1.15; font-variant-numeric: tabular-nums;
  white-space: nowrap; letter-spacing: -0.01em;
}
.metric-card b.v-m { font-size: 28px; }
.metric-card b.v-s { font-size: 22px; letter-spacing: -0.02em; }
.metric-card span { font-size: 13px; letter-spacing: .12em; color: rgba(247, 244, 237, .72); }

/* 肆 客户评价：卷轴式引用（引号书签式悬挂于顶边，避免压住正文） */
.quote-card {
  position: relative; background: var(--paper-2); border: 1px solid var(--faint);
  border-radius: 4px; padding: 48px 44px 30px; margin-top: 40px;
}
.quote-card::before {
  content: "「"; position: absolute; top: -36px; left: 20px;
  font-family: var(--serif); font-size: 74px; color: var(--cinnabar);
  opacity: .18; line-height: 1;
}
.quote-card blockquote { font-family: var(--serif); font-size: 17.5px; line-height: 2; color: var(--ink); letter-spacing: .02em; }
.quote-meta {
  display: flex; align-items: center; gap: 12px; margin-top: 22px;
  padding-top: 18px; border-top: 1px dashed var(--faint);
}
.quote-seal {
  width: 40px; height: 40px; border-radius: 2px; background: var(--cinnabar); color: #FFF7F2;
  display: flex; align-items: center; justify-content: center;
  font-family: var(--serif); font-size: 17px; flex: none;
}
.quote-meta b { font-size: 14.5px; display: block; line-height: 1.4; }
.quote-meta span { font-size: 12.5px; color: var(--ink-50); }

/* ============ 详情侧边栏 ============ */
.case-side { position: sticky; top: 104px; display: flex; flex-direction: column; gap: 20px; }
.side-card { background: var(--paper-2); border: 1px solid var(--faint); border-radius: 4px; padding: 24px; }
.side-card h3 { font-size: 13px; letter-spacing: .28em; color: var(--ink-50); font-weight: 500; margin-bottom: 16px; }
.info-rows { display: flex; flex-direction: column; }
.info-rows > div {
  display: flex; justify-content: space-between; gap: 12px;
  padding: 9px 0; border-bottom: 1px dashed var(--faint-2); font-size: 14px;
}
.info-rows > div:last-child { border-bottom: none; }
.info-rows dt { color: var(--ink-50); flex: none; }
.info-rows dd { color: var(--ink); text-align: right; font-variant-numeric: tabular-nums; }
.deliver-list { list-style: none; display: flex; flex-direction: column; gap: 10px; }
.deliver-list li { display: flex; gap: 10px; font-size: 15px; color: var(--ink-70); align-items: baseline; }
.deliver-list li::before {
  content: ""; width: 6px; height: 6px; background: var(--indigo);
  flex: none; transform: translateY(-2px) rotate(45deg);
}
.side-cta { background: var(--ink); color: var(--paper); border: 1px solid var(--ink); }
.side-cta h3 { color: rgba(247, 244, 237, .6); }
.side-cta p { font-size: 13.5px; color: rgba(247, 244, 237, .78); margin-bottom: 18px; }
.side-cta .btn { width: 100%; justify-content: center; }

/* ============ 关联案例 ============ */
.related { background: var(--paper-2); border-top: 1px solid var(--faint-2); padding: 72px 0 80px; }
.related-head { display: flex; align-items: baseline; justify-content: space-between; gap: 20px; margin-bottom: 32px; }
.related-head h2 { font-family: var(--serif); font-size: 26px; font-weight: 700; letter-spacing: .06em; }
.related-head a { font-size: 14px; color: var(--ink-50); letter-spacing: .1em; }
.related-head a:hover { color: var(--cinnabar); }
.related-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 26px; }
.rel-card {
  display: flex; background: var(--paper); border: 1px solid var(--faint); border-radius: 4px;
  overflow: hidden; transition: border-color .2s, transform .2s var(--ease);
}
.rel-card:hover { border-color: var(--cinnabar); transform: translateY(-4px); }
.rel-cover { width: 168px; flex: none; position: relative; background: #242424; overflow: hidden; }
.rel-cover .case-art { aspect-ratio: auto; position: absolute; inset: 0; }
.rel-body { padding: 18px 20px; display: flex; flex-direction: column; gap: 6px; }
.rel-body .tag-line { align-self: flex-start; font-size: 11px; padding: 3px 10px; }
.rel-body h3 { font-family: var(--serif); font-size: 17.5px; font-weight: 700; line-height: 1.5; }
.rel-card:hover h3 { color: var(--cinnabar-dark); }
.rel-body p { font-size: 13.5px; color: var(--ink-50); }

/* ============ 404 / 加载占位 ============ */
.case-not-found { padding: 120px 0; text-align: center; }
.case-not-found .cfn-mark {
  display: block; font-family: "Zhi Mang Xing", var(--serif); font-weight: 400;
  font-size: 120px; line-height: 1; color: rgba(168, 50, 45, .12); margin-bottom: 8px;
}
.case-not-found h1 { font-family: var(--serif); font-size: 34px; letter-spacing: .08em; margin-bottom: 16px; }
.case-not-found p { color: var(--ink-50); margin-bottom: 32px; }
.case-not-found .cfn-actions { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }

/* ============ 响应式 ============ */
@media (max-width: 960px) {
  .cases-section .cases-grid { grid-template-columns: 1fr; }
  .page-hero .hero-no { font-size: 130px; right: 4%; }
  .case-body-layout { grid-template-columns: 1fr; gap: 40px; }
  .case-side { position: static; flex-direction: row; flex-wrap: wrap; }
  .case-side .side-card { flex: 1 1 260px; }
  .sol-grid { grid-template-columns: 1fr; }
  .related-grid { grid-template-columns: 1fr; }
}
@media (max-width: 640px) {
  .case-filter { position: static; }
  .page-hero { padding: 56px 0 48px; }
  .cases-section { padding: 48px 0 64px; }
  .cases-section .case-body { padding: 20px 20px 18px; }
  .case-foot { flex-direction: column; align-items: flex-start; gap: 12px; }
  .case-hero { padding-top: 36px; }
  .case-cover-wrap .case-art { height: 210px; }
  .case-body-layout { padding: 48px 0 64px; }
  .sec { margin-bottom: 48px; }
  .sec-no { font-size: 46px; }
  .result-metrics { grid-template-columns: 1fr; }
  .rel-card { flex-direction: column; }
  .rel-cover { width: 100%; aspect-ratio: 21 / 9; }
  .quote-card { padding: 40px 24px 24px; margin-top: 36px; }
  .quote-card::before { font-size: 56px; top: -26px; left: 14px; }
  .sub-cta-inner::before { font-size: 80px; }
}