/* ============================================================
   SEO学院 · service.css（建站服务总览）
   十字分割非对称：竖向贯穿线 + 双图叠层 + 不对称卡片阵
   ============================================================ */

/* ---------- 1. Hero ---------- */
.svc-hero{background:linear-gradient(180deg,#EAF6FC 0%,#F3FAFD 100%);padding:46px 0 90px;overflow:hidden}
.svc-vline{left:56%;opacity:.45}
.svc-dots{top:46px;left:3%;width:34%}
.svc-blob{width:110px;height:110px;background:var(--green);top:26px;right:10%;opacity:.3;border-radius:26px}
.svc-hero-in{display:grid;grid-template-columns:1.05fr .95fr;gap:60px;align-items:center}
.svc-hero-text h1{font-size:clamp(32px,4.2vw,50px);line-height:1.22;margin:18px 0 20px}
.svc-hero-text h1 em{font-style:normal;color:var(--blue-deep)}
.svc-hero-text>p{color:var(--muted);max-width:520px;margin-bottom:28px}
.svc-hero-cta{display:flex;gap:14px;flex-wrap:wrap}
.svc-hero-meta{display:flex;gap:34px;margin-top:36px}
.svc-hero-meta b{display:block;font-size:30px;font-weight:900;color:var(--blue-ink);line-height:1.1}
.svc-hero-meta span{font-size:13.5px;color:var(--muted)}
.svc-hero-media{position:relative;min-height:420px}
.svc-ring{
  position:absolute;width:340px;height:340px;right:-30px;top:-46px;
  border:3px dashed var(--blue);border-radius:50%;opacity:.5;
}
.svc-img-main{width:82%;aspect-ratio:16/10;position:relative;z-index:2}
.svc-img-sub{
  position:absolute;right:0;bottom:-46px;z-index:3;
  width:46%;aspect-ratio:4/3;border:6px solid #fff;
  transform:rotate(2.4deg);
}
.svc-hero-flag{
  position:absolute;left:8px;bottom:-24px;z-index:4;
  background:var(--blue-ink);color:#fff;
  font-size:14px;font-weight:800;padding:11px 20px;border-radius:999px;
  box-shadow:var(--shadow-sm);transform:rotate(-2deg);
}

/* ---------- 2. 核心服务：不对称卡片阵 ---------- */
.svc-grid-sec{background:var(--white)}
.svc-cards{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.svc-card{
  position:relative;display:flex;flex-direction:column;
  background:var(--bg);border:2px solid var(--line);border-radius:var(--r-lg);
  padding:30px 26px;overflow:hidden;
  transition:transform .3s ease,box-shadow .3s ease,border-color .3s ease;
}
.svc-card::after{
  content:"";position:absolute;top:0;left:0;right:0;height:6px;
  background:linear-gradient(90deg,var(--blue),var(--green),var(--yellow));
  opacity:0;transition:opacity .3s ease;
}
.svc-card:hover{transform:translateY(-8px);box-shadow:var(--shadow);border-color:var(--blue)}
.svc-card:hover::after{opacity:1}
.svc-card-big{grid-column:span 1}
.svc-card-big:first-child{grid-column:1/2;background:linear-gradient(160deg,#EAF6FC,#fff)}
.svc-card-big:last-child{grid-column:3/4}
.svc-card-ic{
  width:60px;height:60px;border-radius:18px;
  display:flex;align-items:center;justify-content:center;
  font-size:30px;margin-bottom:18px;
  background:var(--blue);color:var(--ink);
}
.svc-card:nth-child(3n+2) .svc-card-ic{background:var(--green)}
.svc-card:nth-child(3n) .svc-card-ic{background:var(--yellow)}
.svc-card h3{font-size:19px;margin-bottom:10px}
.svc-card p{font-size:14.5px;color:var(--muted);flex:1;margin-bottom:14px}
.svc-card-link{font-size:14px;font-weight:800;color:var(--blue-deep)}

/* ---------- 3. 对比表 ---------- */
.svc-cmp{background:var(--cream);position:relative}
.svc-cmp-x{top:44%}
.cmp-table-wrap{overflow-x:auto;border-radius:var(--r-lg);box-shadow:var(--shadow-sm)}
.cmp-table{width:100%;border-collapse:collapse;background:#fff;min-width:680px}
.cmp-table th,.cmp-table td{padding:15px 20px;text-align:left;font-size:15px;border-bottom:1px solid var(--line)}
.cmp-table thead th{background:var(--blue-ink);color:#fff;font-size:16px}
.cmp-table thead th:first-child{border-radius:var(--r-md) 0 0 0}
.cmp-table thead th:last-child{border-radius:0 var(--r-md) 0 0}
.cmp-table tbody tr:nth-child(even){background:var(--bg)}
.cmp-table tbody td:first-child{font-weight:800;color:var(--ink);width:160px}
.cmp-table tbody td:nth-child(2){color:var(--blue-ink);font-weight:600}
.cmp-badge{display:inline-block;background:var(--yellow);color:var(--ink);padding:3px 12px;border-radius:999px;font-size:14px}
.cmp-note{margin-top:26px;color:var(--muted);text-align:center}
.cmp-note a{font-weight:800;color:var(--blue-deep)}

/* ---------- 4. 服务清单 ---------- */
.svc-all{background:var(--bg)}
.svc-all-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.svc-all-item{
  display:flex;align-items:center;gap:16px;
  background:#fff;border:2px solid var(--line);border-radius:var(--r-md);
  padding:18px 20px;
  transition:transform .3s ease,box-shadow .3s ease,border-color .3s ease;
}
.svc-all-item:hover{transform:translateY(-5px);box-shadow:var(--shadow-sm);border-color:var(--green-deep)}
.svc-all-no{
  font-size:22px;font-weight:900;color:var(--blue);
  width:44px;height:44px;border-radius:50%;
  background:var(--bg);display:flex;align-items:center;justify-content:center;
  flex:none;
}
.svc-all-item b{display:block;font-size:15.5px;color:var(--ink)}
.svc-all-item i{font-style:normal;font-size:13px;color:var(--muted)}

/* ---------- 5. 行业适配 ---------- */
.svc-industry{background:var(--white)}
.svc-industry-in{display:grid;grid-template-columns:.9fr 1.1fr;gap:56px;align-items:center}
.svc-industry-text h2{margin-bottom:16px}
.svc-industry-text p{color:var(--muted);margin-bottom:26px}
.svc-industry-tags{display:flex;flex-wrap:wrap;gap:12px}
.svc-industry-tags a{
  padding:10px 20px;border-radius:999px;
  background:var(--bg);border:2px solid var(--line);
  font-size:14.5px;font-weight:700;color:var(--ink);
  transition:transform .25s ease,border-color .25s ease,background .25s ease;
}
.svc-industry-tags a:hover{transform:translateY(-3px) rotate(-1deg);border-color:var(--yellow-deep);background:var(--yellow)}

/* ---------- 6. 流程：纵向时间线 ---------- */
.svc-steps{background:var(--cream);position:relative}
.svc-steps-v{left:8%}
.svc-step-list{max-width:760px;margin:0 auto;position:relative;padding-left:74px}
.svc-step-list::before{
  content:"";position:absolute;left:27px;top:12px;bottom:12px;
  width:3px;border-radius:3px;
  background:repeating-linear-gradient(180deg,var(--blue-deep) 0 14px,transparent 14px 24px);
  opacity:.5;
}
.svc-step{position:relative;padding-bottom:26px}
.svc-step-no{
  position:absolute;left:-74px;top:0;z-index:2;
  width:56px;height:56px;border-radius:50%;
  background:var(--blue);color:var(--ink);
  font-weight:900;font-size:20px;
  display:flex;align-items:center;justify-content:center;
  border:5px solid #fff;box-shadow:var(--shadow-sm);
}
.svc-step:nth-child(3n+2) .svc-step-no{background:var(--green)}
.svc-step:nth-child(3n) .svc-step-no{background:var(--yellow)}
.svc-step-body{
  background:#fff;border:2px solid var(--line);border-radius:var(--r-md);
  padding:18px 22px;
}
.svc-step-body b{font-size:17px;display:block;margin-bottom:6px}
.svc-step-body p{font-size:14.5px;color:var(--muted)}
.svc-steps-more{text-align:center;margin-top:10px}
.svc-steps-more a{font-weight:800;color:var(--blue-deep);border-bottom:2px dashed var(--blue-deep)}

/* ---------- 7. FAQ ---------- */
.svc-faq{background:var(--white)}
.svc-faq-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.svc-faq-item{
  background:var(--bg);border:2px solid var(--line);border-radius:var(--r-md);
  overflow:hidden;transition:border-color .25s ease,box-shadow .25s ease;
}
.svc-faq-item[open]{border-color:var(--blue);box-shadow:var(--shadow-sm)}
.svc-faq-item summary{
  list-style:none;cursor:pointer;padding:18px 20px;
  font-weight:800;font-size:15.5px;display:flex;gap:10px;align-items:center;
}
.svc-faq-item summary::-webkit-details-marker{display:none}
.svc-faq-item summary::before{
  content:"Q";flex:none;width:26px;height:26px;border-radius:50%;
  background:var(--blue);color:#fff;font-size:13px;
  display:flex;align-items:center;justify-content:center;
}
.svc-faq-item p{padding:0 20px 18px 56px;color:var(--muted);font-size:14.5px}
.svc-faq-more{text-align:center;margin-top:28px;color:var(--muted)}
.svc-faq-more a{font-weight:800;color:var(--blue-deep)}

/* ---------- 8. CTA ---------- */
.svc-cta{background:var(--bg)}
.svc-cta-band{
  position:relative;overflow:hidden;text-align:center;
  background:linear-gradient(120deg,var(--blue-ink),#3E86AD);
  border-radius:var(--r-lg);padding:64px 40px;
  color:#fff;
}
.svc-cta-blob{width:170px;height:170px;background:var(--yellow);right:-30px;top:-40px;opacity:.18}
.svc-cta-band h2{color:#fff;font-size:clamp(26px,3.2vw,38px);margin-bottom:14px}
.svc-cta-band h2 em{font-style:normal;color:var(--yellow)}
.svc-cta-band>p{color:#C9E4F2;margin-bottom:30px}
.svc-cta-actions{display:flex;gap:16px;justify-content:center;flex-wrap:wrap}
.svc-cta-wechat{margin-top:22px;font-size:14.5px;color:#A9CFE2}

/* ---------- 响应式 ---------- */
@media (max-width:1000px){
  .svc-hero-in{grid-template-columns:1fr;gap:52px}
  .svc-vline{display:none}
  .svc-cards{grid-template-columns:1fr 1fr}
  .svc-card-big:first-child,.svc-card-big:last-child{grid-column:auto}
  .svc-all-grid{grid-template-columns:1fr 1fr}
  .svc-industry-in{grid-template-columns:1fr;gap:36px}
  .svc-faq-grid{grid-template-columns:1fr}
}
@media (max-width:640px){
  .svc-hero-meta{gap:22px}
  .svc-cards{grid-template-columns:1fr}
  .svc-all-grid{grid-template-columns:1fr}
  .svc-hero-media{min-height:0}
  .svc-img-main{width:100%}
  .svc-img-sub{display:none}
  .svc-step-list{padding-left:0}
  .svc-step-no{position:static;margin-bottom:10px}
  .svc-step-list::before{display:none}
}