/* ============================================================
   案例总览 case.css —— 作品集式大图网格
   布局：全屏 Hero / 筛选 chips + 大图网格 / 暗场数据 /
   左图右清单能力背书 / 评价卡三列 / 手风琴 FAQ / CTA
   ============================================================ */

/* ---------- 1. Hero ---------- */
.case-hero{
  position:relative;min-height:92vh;display:flex;align-items:center;
  overflow:hidden;background:var(--ink);
}
.ch-bg{background-position:center 35%}
.ch-veil{
  position:absolute;inset:0;z-index:1;
  background:
    linear-gradient(105deg,rgba(20,20,20,.9) 0%,rgba(20,20,20,.6) 50%,rgba(20,20,20,.3) 100%),
    linear-gradient(0deg,rgba(20,20,20,.55),transparent 45%);
}
.ch-inner{position:relative;z-index:2;max-width:860px;padding-top:120px;padding-bottom:90px}
.crumb{
  display:inline-flex;align-items:center;gap:10px;margin-bottom:26px;
  font-size:14px;color:#D8CFBF;
}
.crumb a{color:#fff;font-weight:600}
.crumb a:hover{color:var(--coffee-bright)}
.crumb span{color:var(--coffee)}
.crumb em{font-style:normal;color:var(--coffee-bright);font-weight:700}
.ch-eyebrow{
  color:var(--coffee-bright);font-size:13px;font-weight:800;letter-spacing:.3em;
  margin-bottom:18px;
}
.ch-title{
  color:#fff;font-size:clamp(38px,6vw,68px);font-weight:900;line-height:1.12;
  letter-spacing:-.02em;margin-bottom:22px;
}
.ch-gold{
  color:var(--coffee);position:relative;white-space:nowrap;
}
.ch-gold::after{
  content:"";position:absolute;left:0;right:0;bottom:.06em;height:.12em;
  background:linear-gradient(90deg,var(--coffee),transparent);border-radius:2px;
}
.ch-sub{color:#D8CFBF;font-size:clamp(15px,1.7vw,18px);line-height:1.9;margin-bottom:36px;max-width:620px}
.ch-cta{display:flex;gap:16px;flex-wrap:wrap}
.scroll-hint{
  position:absolute;left:50%;bottom:26px;transform:translateX(-50%);
  width:26px;height:44px;border:2px solid rgba(255,255,255,.4);border-radius:14px;
  z-index:3;display:flex;justify-content:center;padding-top:8px;background:none;
}
.scroll-hint span{width:3px;height:9px;border-radius:3px;background:#fff;animation:hintDrop 1.8s ease infinite}
@keyframes hintDrop{0%{opacity:0;transform:translateY(0)}35%{opacity:1}100%{opacity:0;transform:translateY(14px)}}
@media (max-width:640px){.case-hero{min-height:88vh}.ch-cta .btn{width:100%}.scroll-hint{display:none}}

/* ---------- 2. 筛选条 + 大图网格 ---------- */
.case-grid-sec{background:linear-gradient(180deg,#fff 0%,var(--coffee-bg) 100%)}
.filter-bar{
  display:flex;gap:10px;flex-wrap:wrap;margin-bottom:40px;
  padding:10px;background:#fff;border-radius:100px;border:1px solid var(--line);
  box-shadow:var(--shadow-sm);width:fit-content;
}
.f-chip{
  padding:10px 22px;border-radius:100px;font-size:14px;font-weight:700;
  color:var(--text-2);background:transparent;transition:all .3s;
}
.f-chip:hover{color:var(--ink);background:var(--coffee-bg)}
.f-chip.active{background:var(--grad-coffee);color:#fff;box-shadow:0 6px 18px rgba(169,136,89,.35)}
.pg-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:26px}
.pg-card{
  background:#fff;border-radius:20px;overflow:hidden;
  border:1px solid var(--line);box-shadow:var(--shadow-sm);
  transition:all .45s cubic-bezier(.22,.68,.4,1);
}
.pg-card.hide{display:none}
.pg-card:hover{transform:translateY(-10px);box-shadow:var(--shadow-lg);border-color:transparent}
.pg-card>a>img{width:100%;height:220px;object-fit:cover;transition:transform .6s}
.pg-card:hover>a>img{transform:scale(1.07)}
.pg-body{padding:24px 24px 26px}
.pg-tag{
  display:inline-block;font-size:12px;font-weight:800;letter-spacing:.1em;
  color:var(--coffee-deep);background:var(--coffee-bg);
  padding:5px 13px;border-radius:100px;margin-bottom:14px;
}
.pg-body h3{font-size:18px;line-height:1.45;margin-bottom:10px}
.pg-body h3 a:hover{color:var(--coffee-deep)}
.pg-body p{font-size:13.5px;color:var(--text-2);line-height:1.8;margin-bottom:14px}
.pg-more{font-size:13px;font-weight:800;color:var(--ink)}
.pg-more:hover{color:var(--coffee-deep)}
/* 第 9 张「更多案例咨询」卡 */
.pg-more-card{
  display:flex;align-items:center;justify-content:center;min-height:340px;
  background:var(--grad-ink);border:none;text-align:center;
}
.pg-more-inner{padding:36px 30px}
.pg-more-ic{
  display:inline-flex;width:60px;height:60px;border-radius:50%;
  background:var(--grad-coffee);color:#fff;font-size:30px;font-weight:300;
  align-items:center;justify-content:center;margin-bottom:18px;
}
.pg-more-card h3{color:#fff;font-size:20px;margin-bottom:10px}
.pg-more-card p{color:#CFC7B8;font-size:14px;line-height:1.8;margin-bottom:18px}
.pg-more-link{color:var(--coffee-bright);font-weight:800;font-size:14px}
.pg-more-card:hover .pg-more-link{color:#fff}
@media (max-width:1024px){.pg-grid{grid-template-columns:1fr 1fr}}
@media (max-width:640px){.pg-grid{grid-template-columns:1fr}.filter-bar{width:100%;border-radius:18px}}

/* ---------- 3. 暗场数据条 ---------- */
.case-nums{position:relative;overflow:hidden;padding:100px 0;background:var(--ink)}
.cn-bg{background-position:center 60%}
.cn-veil{position:absolute;inset:0;background:rgba(20,20,20,.84);z-index:1}
.cn-inner{position:relative;z-index:2;display:grid;grid-template-columns:repeat(4,1fr);gap:24px;text-align:center}
.cn-item{position:relative;padding:10px 6px}
.cn-item::after{
  content:"";position:absolute;right:-12px;top:20%;bottom:20%;width:1px;
  background:linear-gradient(rgba(201,168,124,.4),transparent);
}
.cn-item:last-child::after{display:none}
.cn-item b{
  display:block;font-size:clamp(38px,4.6vw,58px);font-weight:900;color:#fff;
  line-height:1.1;margin-bottom:10px;font-variant-numeric:tabular-nums;
}
.cn-item span{color:var(--coffee-bright);font-size:14px;letter-spacing:.1em}
@media (max-width:768px){
  .cn-inner{grid-template-columns:1fr 1fr;gap:38px}
  .cn-item:nth-child(2)::after{display:none}
}

/* ---------- 4. 能力背书（左图右清单） ---------- */
.case-vendor{background:#fff}
.vendor-inner{display:grid;grid-template-columns:1fr 1.15fr;gap:64px;align-items:center}
.vendor-media{position:relative}
.vendor-media img{border-radius:24px;box-shadow:var(--shadow-md)}
.vendor-stamp{
  position:absolute;right:-26px;bottom:36px;
  background:var(--ink);color:var(--coffee-bright);
  font-size:14px;font-weight:800;line-height:1.6;text-align:center;
  padding:20px 24px;border-radius:16px;box-shadow:var(--shadow-lg);
  border:1px solid rgba(201,168,124,.35);
}
.vendor-list ul{margin-bottom:34px}
.vendor-list li{
  display:flex;gap:20px;padding:22px 0;border-bottom:1px solid var(--line);
}
.vendor-list li>b{
  font-size:26px;font-weight:900;color:var(--coffee-bg-2);line-height:1.2;flex-shrink:0;
}
.vendor-list h3{font-size:17px;margin-bottom:6px}
.vendor-list p{font-size:14px;color:var(--text-2);line-height:1.85}
.vendor-cta{display:flex;gap:14px;flex-wrap:wrap}
@media (max-width:1024px){
  .vendor-inner{grid-template-columns:1fr;gap:44px}
  .vendor-stamp{right:16px}
}

/* ---------- 5. 客户评价 ---------- */
.case-testi{background:var(--coffee-bg)}
.tst-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:26px}
.tst-card{
  position:relative;background:#fff;border-radius:20px;padding:38px 30px 30px;
  border:1px solid var(--line);box-shadow:var(--shadow-sm);
  transition:all .4s cubic-bezier(.22,.68,.4,1);
}
.tst-card:hover{transform:translateY(-8px);box-shadow:var(--shadow-lg)}
.tst-mark{
  font-size:64px;font-weight:900;line-height:.6;color:var(--grad-coffee);
  background:var(--grad-coffee);-webkit-background-clip:text;background-clip:text;
  -webkit-text-fill-color:transparent;margin-bottom:18px;height:26px;
}
.tst-card>p:not(.tst-mark){font-size:15px;line-height:1.9;color:var(--text);margin-bottom:24px}
.tst-card footer b{display:block;font-size:14.5px;margin-bottom:4px}
.tst-card footer span{font-size:12.5px;color:var(--coffee-deep);font-weight:700}
@media (max-width:1024px){.tst-grid{grid-template-columns:1fr 1fr}}
@media (max-width:640px){.tst-grid{grid-template-columns:1fr}}

/* ---------- 6. FAQ 手风琴 ---------- */
.case-faq{background:#fff}
.faq-inner{max-width:860px;margin:0 auto}
.acc-wrap{display:flex;flex-direction:column;gap:14px}
.acc-item{
  border:1px solid var(--line);border-radius:16px;background:#fff;
  overflow:hidden;transition:border-color .3s,box-shadow .3s;
}
.acc-item.open{border-color:var(--coffee);box-shadow:var(--shadow-sm)}
.acc-head{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:20px 26px;font-size:16px;font-weight:800;color:var(--ink);text-align:left;
  background:none;
}
.acc-arrow{
  flex-shrink:0;width:30px;height:30px;border-radius:50%;
  background:var(--coffee-bg);color:var(--coffee-deep);
  display:flex;align-items:center;justify-content:center;
  font-size:18px;font-weight:400;transition:all .35s;
}
.acc-item.open .acc-arrow{background:var(--grad-coffee);color:#fff;transform:rotate(45deg)}
.acc-panel{max-height:0;overflow:hidden;transition:max-height .4s ease}
.acc-body{padding:0 26px 22px;font-size:14.5px;color:var(--text-2);line-height:1.9}