/* ============================================================
   SEO学院 · anli-dianqi.css（电气行业案例详情）
   十字分割非对称：横线切割 + 错位图文 + 数字圆卡
   ============================================================ */

/* ---------- 1. Hero ---------- */
.cs-hero{background:linear-gradient(180deg,#EAF6FC 0%,#F3FAFD 100%);padding:44px 0 78px;overflow:hidden}
.cs-hero-x{top:56%}
.cs-blob{width:120px;height:120px;background:var(--blue);right:8%;top:24px;opacity:.25;border-radius:30px}
.cs-hero-in{display:grid;grid-template-columns:1fr 1.05fr;gap:56px;align-items:center}
.cs-hero-text h1{font-size:clamp(30px,3.8vw,46px);line-height:1.24;margin:16px 0 18px}
.cs-hero-text h1 em{font-style:normal;color:var(--blue-deep)}
.cs-hero-text>p{color:var(--muted);margin-bottom:26px;max-width:520px}
.cs-hero-tags{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.cs-hero-tags li{
  background:#fff;border:2px solid var(--line);border-radius:var(--r-md);
  padding:11px 15px;display:flex;flex-direction:column;
}
.cs-hero-tags b{font-size:12px;color:var(--muted);font-weight:600;margin-bottom:3px}
.cs-hero-tags span{font-size:14px;font-weight:800;color:var(--ink)}
.cs-hero-media{position:relative}
.cs-hero-media .photo{width:100%;aspect-ratio:16/10;border:5px solid #fff}
.cs-hero-cap{
  position:absolute;left:-16px;bottom:22px;
  background:var(--blue-ink);color:#fff;
  font-size:13px;font-weight:700;padding:9px 16px;border-radius:12px;
  box-shadow:var(--shadow-sm);transform:rotate(-2deg);
}

/* ---------- 2. 背景与需求 ---------- */
.cs-brief{background:var(--white)}
.cs-brief-in{display:grid;grid-template-columns:1fr 1fr;gap:60px;align-items:center}
.cs-brief-text h2{margin-bottom:18px}
.cs-brief-text p{color:var(--muted);margin-bottom:16px}
.cs-brief-cards{display:flex;flex-direction:column;gap:20px}
.cs-need{
  background:var(--bg);border:2px solid var(--line);border-radius:var(--r-lg);
  padding:26px 28px;position:relative;overflow:hidden;
}
.cs-need-y{background:var(--cream);border-color:var(--yellow-deep)}
.cs-need-no{
  position:absolute;top:8px;right:18px;
  font-size:52px;font-weight:900;color:rgba(86,179,220,.14);
}
.cs-need-y .cs-need-no{color:rgba(245,200,75,.3)}
.cs-need h3{font-size:18px;margin-bottom:12px}
.cs-need li{
  position:relative;padding:7px 0 7px 26px;font-size:14.5px;color:var(--ink);
}
.cs-need li::before{
  content:"";position:absolute;left:2px;top:15px;
  width:12px;height:12px;border-radius:50%;background:var(--green-deep);
}
.cs-need-y li::before{background:var(--yellow-deep)}

/* ---------- 3. 数据指标 ---------- */
.cs-data{background:var(--cream);position:relative}
.cs-data-v{left:14%}
.cs-data-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:22px}
.cs-data-card{
  background:#fff;border:2px solid var(--line);border-radius:var(--r-lg);
  text-align:center;padding:34px 16px;
  transition:transform .3s ease,box-shadow .3s ease,border-color .3s ease;
}
.cs-data-card:hover{transform:translateY(-6px);box-shadow:var(--shadow);border-color:var(--blue)}
.cs-data-card b{display:block;font-size:38px;font-weight:900;color:var(--blue-deep);line-height:1.15;margin-bottom:8px}
.cs-data-card:nth-child(2) b{color:var(--green-deep)}
.cs-data-card:nth-child(3) b{color:var(--yellow-deep)}
.cs-data-card span{font-size:14px;color:var(--muted);font-weight:600}
.cs-data-note{text-align:center;margin-top:26px;font-size:13.5px;color:var(--muted)}

/* ---------- 4. 设计亮点 ---------- */
.cs-points{background:var(--white)}
.cs-point{display:grid;grid-template-columns:1fr 1fr;gap:60px;align-items:center}
.cs-point + .cs-point{margin-top:70px}
.cs-point-media{position:relative}
.cs-point-media::before{
  content:"";position:absolute;width:86%;height:86%;
  border:3px solid var(--green);border-radius:var(--r-lg);
  left:-18px;top:-18px;
}
.cs-point-rev .cs-point-media::before{left:auto;right:-18px;border-color:var(--blue)}
.cs-point-media img{position:relative;z-index:1;width:100%;aspect-ratio:16/10}
.cs-point-no{
  display:inline-block;background:var(--green);color:var(--ink);
  font-size:13px;font-weight:800;padding:6px 15px;border-radius:999px;
  margin-bottom:14px;
}
.cs-point-rev .cs-point-no{background:var(--yellow)}
.cs-point-text h3{font-size:23px;margin-bottom:12px}
.cs-point-text p{color:var(--muted)}

/* ---------- 5. 客户评价 ---------- */
.cs-quote{background:var(--bg)}
.cs-quote-card{
  max-width:860px;margin:0 auto;text-align:center;
  background:#fff;border:2px solid var(--line);border-radius:var(--r-lg);
  padding:44px 40px;position:relative;
}
.cs-quote-card::before{
  content:"”";position:absolute;top:-6px;left:26px;
  font-size:96px;font-weight:900;color:var(--yellow);line-height:1;
}
.cs-quote-card p{font-size:18px;line-height:1.9;margin-bottom:18px}
.cs-quote-card footer{font-size:14px;color:var(--muted);font-weight:700}
.cs-quote-note{text-align:center;margin-top:20px;font-size:13px;color:var(--muted)}

/* ---------- 6. 相关案例 ---------- */
.cs-more{background:var(--cream)}
.cs-more-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.cs-more-card{
  display:block;background:#fff;border:2px solid var(--line);border-radius:var(--r-lg);
  overflow:hidden;transition:transform .3s ease,box-shadow .3s ease;
}
.cs-more-card:hover{transform:translateY(-6px);box-shadow:var(--shadow)}
.cs-more-card img{width:100%;aspect-ratio:16/9;object-fit:cover}
.cs-more-card b{display:block;padding:16px 18px 2px;font-size:17px}
.cs-more-card i{font-style:normal;display:block;padding:0 18px 18px;font-size:13.5px;color:var(--muted)}
.cs-more-link{text-align:center;margin-top:34px}
.cs-more-link a{font-weight:800;color:var(--blue-deep);border-bottom:2px dashed var(--blue-deep)}

/* ---------- 7. 服务清单 ---------- */
.cs-svc{background:var(--white)}
.cs-svc-in{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center}
.cs-svc-text h2{margin-bottom:16px}
.cs-svc-text p{color:var(--muted);margin-bottom:26px}
.cs-svc-list{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.cs-svc-list a{
  background:var(--bg);border:2px solid var(--line);border-radius:var(--r-md);
  padding:15px 18px;font-weight:800;font-size:14.5px;color:var(--ink);
  display:flex;align-items:center;gap:10px;
  transition:transform .25s ease,border-color .25s ease,background .25s ease;
}
.cs-svc-list a::before{content:"";width:8px;height:8px;border-radius:50%;background:var(--blue-deep);flex:none}
.cs-svc-list a:hover{transform:translateY(-3px);border-color:var(--blue-deep);background:var(--yellow)}

/* ---------- 8. CTA ---------- */
.cs-cta{background:var(--bg)}
.cs-cta-band{
  position:relative;overflow:hidden;
  background:linear-gradient(120deg,var(--blue-ink),#3E86AD);
  border-radius:var(--r-lg);padding:58px 40px;text-align:center;color:#fff;
}
.cs-cta-blob{width:160px;height:160px;background:var(--green);left:-40px;bottom:-50px;opacity:.2;border-radius:40px}
.cs-cta-band h2{color:#fff;font-size:clamp(24px,3vw,34px);margin-bottom:14px}
.cs-cta-band>p{color:#C9E4F2;margin-bottom:30px}
.cs-cta-actions{display:flex;gap:16px;justify-content:center;flex-wrap:wrap;position:relative;z-index:2}
.cs-cta-wechat{margin-top:22px;font-size:14.5px;color:#A9CFE2}

/* ---------- 响应式 ---------- */
@media (max-width:1000px){
  .cs-hero-in{grid-template-columns:1fr;gap:44px}
  .cs-brief-in{grid-template-columns:1fr;gap:40px}
  .cs-data-grid{grid-template-columns:1fr 1fr}
  .cs-point{grid-template-columns:1fr;gap:40px}
  .cs-point-rev .cs-point-text{order:2}
  .cs-point-rev .cs-point-media{order:1}
  .cs-more-grid{grid-template-columns:1fr 1fr}
  .cs-svc-in{grid-template-columns:1fr;gap:36px}
}
@media (max-width:640px){
  .cs-hero-tags{grid-template-columns:1fr}
  .cs-data-grid{grid-template-columns:1fr}
  .cs-more-grid{grid-template-columns:1fr}
  .cs-svc-list{grid-template-columns:1fr}
}

/* ===== 案例页客户常问模块（验收补强） ===== */
.cs-faq{position:relative;background:linear-gradient(180deg,#f3faf6,#eef7f0);overflow:hidden}
.cs-faq-x{top:46%;left:0;right:0;height:2px;background:linear-gradient(90deg,rgba(171,224,195,0),rgba(171,224,195,.7),rgba(171,224,195,0))}
.cs-faq .container{position:relative;z-index:1}
.cs-faq-list{max-width:860px;margin:34px auto 0}
.cs-faq-item{background:#fff;border:2px solid #d9efe3;border-radius:16px;margin-bottom:16px;padding:20px 24px;transition:border-color .3s ease;box-shadow:0 6px 18px rgba(80,160,120,.08)}
.cs-faq-item[open]{border-color:#8fc9a8}
.cs-faq-item summary{cursor:pointer;font-weight:700;color:#23624a;font-size:1.02rem;line-height:1.6;list-style:none;position:relative;padding-right:26px}
.cs-faq-item summary::after{content:"";position:absolute;right:2px;top:50%;width:10px;height:10px;border-right:3px solid #8fc9a8;border-bottom:3px solid #8fc9a8;transform:translateY(-70%) rotate(45deg);transition:transform .3s ease}
.cs-faq-item[open] summary::after{transform:translateY(-30%) rotate(-135deg)}
.cs-faq-item p{margin-top:12px;font-size:.95rem;line-height:1.9;color:#5b6b76}.cs-faq-note{margin-top:26px;padding:18px 24px;background:#fff;border-left:6px solid #8fc9a8;border-radius:0 14px 14px 0;font-size:.95rem;line-height:1.9;color:#4a6b5c}