/* ==========================================================================
   cases.html · 案例展示总览（F5 瀑布错列）
   布局指纹：CSS columns 多列瀑布，卡片高度随内容错落
   ========================================================================== */

/* ===== ① Banner ===== */
.cs-hero{position:relative;min-height:560px;display:flex;align-items:center;overflow:hidden}
.cs-hero-bg{position:absolute;inset:0;z-index:0}
.cs-hero-bg img{width:100%;height:100%;object-fit:cover}
.cs-hero::after{
  content:"";position:absolute;inset:0;z-index:1;
  background:linear-gradient(115deg,rgba(29,52,38,.82) 0%,rgba(29,52,38,.55) 45%,rgba(38,37,31,.15) 100%);
}
.cs-hero-inner{position:relative;z-index:2;color:var(--moon-100);padding-block:90px}
.cs-hero-inner .kicker{color:var(--cinnabar-400)}
.cs-hero-inner .kicker::before{background:var(--cinnabar-400)}
.cs-hero h1{
  font-size:clamp(34px,4.6vw,58px);color:var(--moon-50);line-height:1.28;
  letter-spacing:.04em;margin-top:18px;
}
.cs-hero .lead{color:rgba(247,245,238,.85);margin-top:22px;max-width:680px}
.cs-hero-cta{display:flex;gap:14px;flex-wrap:wrap;margin-top:34px}

/* ===== ② 行业筛选标签 ===== */
.cs-filter-wrap{background:var(--moon-50);border-bottom:1px solid var(--line-soft)}
.cs-filter-head{margin-bottom:30px}
.cs-filter-tags{
  display:flex;flex-wrap:wrap;gap:10px;justify-content:center;
}
.case-tag{
  padding:8px 20px;border:1px solid var(--line);border-radius:999px;
  background:#fff;font-size:14px;color:var(--ink-700);letter-spacing:.05em;
  transition:all .25s ease;
}
.case-tag:hover{
  background:var(--bamboo-500);border-color:var(--bamboo-500);color:var(--moon-50);
  transform:translateY(-2px);box-shadow:0 8px 18px rgba(78,124,91,.25);
}

/* ===== ③ 瀑布错列卡片 ===== */
.cs-masonry-bg{background:
  radial-gradient(800px 300px at 100% 0%, rgba(78,124,91,.05), transparent 60%),
  var(--moon-100);}
.cs-masonry{
  columns:3;column-gap:26px;
}
.case-card{
  break-inside:avoid;margin-bottom:26px;background:#fff;border-radius:var(--radius);
  overflow:hidden;box-shadow:var(--shadow-soft);transition:transform .3s ease,box-shadow .3s ease;
  border:1px solid var(--line-soft);
}
.case-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-lift)}
.case-card:nth-child(3n+1){margin-top:0}
.case-card:nth-child(3n+2){margin-top:28px}
.case-card:nth-child(3n){margin-top:8px}
.case-card-thumb{position:relative;display:block;overflow:hidden}
.case-card-thumb img{
  width:100%;height:auto;aspect-ratio:4/3;object-fit:cover;
  transition:transform .5s ease;
}
.case-card:hover .case-card-thumb img{transform:scale(1.06)}
.case-card-ind{
  position:absolute;left:14px;top:14px;
  background:var(--cinnabar-500);color:#FFF3EC;font-size:12.5px;letter-spacing:.1em;
  padding:4px 12px;border-radius:5px;box-shadow:inset 0 0 0 2px rgba(255,243,236,.3);
  font-family:var(--serif);
}
.case-card-body{padding:18px 20px 20px}
.case-card-body h3{font-size:17px;line-height:1.5}
.case-card-body h3 a{color:var(--ink-900)}
.case-card-body h3 a:hover{color:var(--cinnabar-600)}
.case-card-svc{font-size:13.5px;color:var(--ink-500);margin-top:8px;line-height:1.7}
.case-card-meta{
  display:flex;justify-content:space-between;align-items:center;
  margin-top:14px;padding-top:14px;border-top:1px dashed var(--line);
}
.case-card-city{
  font-size:12.5px;color:var(--bamboo-600);background:rgba(78,124,91,.08);
  padding:3px 10px;border-radius:4px;
}
.case-card-link{font-size:13.5px;color:var(--cinnabar-500);font-weight:600}
.case-card-link i{font-style:normal;transition:transform .25s ease;display:inline-block}
.case-card:hover .case-card-link i{transform:translateX(4px)}

/* ===== ④ 数据区 ===== */
.cs-stats-bg{background:var(--bamboo-900);color:var(--moon-100);position:relative;overflow:hidden}
.cs-stats-bg::before{
  content:"";position:absolute;right:-80px;top:-80px;width:320px;height:320px;
  border:1px solid rgba(247,245,238,.08);border-radius:50%;
}
.cs-stats-bg::after{
  content:"";position:absolute;right:-30px;top:-30px;width:220px;height:220px;
  border:1px solid rgba(192,47,43,.25);border-radius:50%;
}
.cs-stats-bg .kicker{color:var(--cinnabar-400)}
.cs-stats-bg .kicker::before{background:var(--cinnabar-400)}
.cs-stats-bg .section-title{color:var(--moon-50)}
.cs-stats-bg .section-desc{color:rgba(247,245,238,.7)}
.cs-stats{
  display:grid;grid-template-columns:repeat(4,1fr);gap:30px;margin-top:50px;position:relative;z-index:1;
}
.cs-stat-num{
  font-family:var(--serif);font-size:clamp(40px,4.6vw,60px);color:var(--moon-50);
  font-weight:700;line-height:1;display:block;
}
.cs-stat-num span{font-size:.45em;color:var(--cinnabar-400);margin-left:4px}
.cs-stats li p{color:rgba(247,245,238,.7);margin-top:12px;font-size:14.5px;letter-spacing:.06em}

/* ===== ⑤ 客户评价 ===== */
.cs-quotes{
  display:grid;grid-template-columns:repeat(3,1fr);gap:26px;margin-top:50px;
}
.cs-quote{
  background:var(--moon-50);border:1px solid var(--line-soft);border-radius:var(--radius);
  padding:30px 26px;position:relative;
}
.cs-quote::before{
  content:"“";position:absolute;left:18px;top:6px;
  font-family:var(--serif);font-size:64px;color:var(--bamboo-300);line-height:1;
}
.cs-quote p{font-size:15px;line-height:2;color:var(--ink-700);padding-top:24px;position:relative;z-index:1}
.cs-quote footer{
  margin-top:20px;padding-top:16px;border-top:1px dashed var(--line);
  display:flex;flex-direction:column;gap:4px;
}
.cs-quote footer strong{color:var(--bamboo-700);font-size:14.5px}
.cs-quote footer span{font-size:13px;color:var(--ink-500)}

/* ===== ⑥ CTA ===== */
.cs-cta{
  background:
    linear-gradient(120deg, rgba(163,38,34,.94), rgba(192,47,43,.9)),
    var(--cinnabar-600);
  color:#FFF3EC;
}
.cs-cta-inner{
  display:flex;justify-content:space-between;align-items:center;gap:30px;
  padding-block:clamp(48px,6vw,80px);flex-wrap:wrap;
}
.cs-cta h2{color:#FFF8F2;font-size:clamp(24px,3vw,36px);letter-spacing:.04em}
.cs-cta p{color:rgba(255,243,236,.85);margin-top:10px;max-width:520px}
.cs-cta-btns{display:flex;gap:14px;flex-wrap:wrap}

/* ===== 响应式 ===== */
@media (max-width:1080px){
  .cs-masonry{columns:2;column-gap:20px}
  .case-card:nth-child(3n+1),.case-card:nth-child(3n+2),.case-card:nth-child(3n){margin-top:0}
  .case-card:nth-child(2n){margin-top:22px}
  .cs-stats{grid-template-columns:repeat(2,1fr);gap:28px}
  .cs-quotes{grid-template-columns:1fr;gap:20px}
}
@media (max-width:640px){
  .cs-masonry{columns:1}
  .case-card{margin-top:0!important;margin-bottom:20px}
  .cs-stats{grid-template-columns:1fr 1fr;gap:22px}
  .cs-hero{min-height:480px}
  .cs-hero-inner{padding-block:60px 50px}
  .case-tag{padding:6px 14px;font-size:13px}
}