/* ============================================================
   页面：kaifeng.html 开封网站建设（L3 布局）
   签名布局：hero 左侧图右侧文字分屏；服务网格 / 特色三栏 / 案例横卷轴 / 清单优势 / 折叠FAQ
   ============================================================ */

/* ---------- L3 Hero：左图右文分屏 ---------- */
body.page-kaifeng .kf-hero{
  background:var(--grad-soft);
  padding:80px 0 88px;
}
body.page-kaifeng .kf-hero-in{
  display:grid;
  grid-template-columns:1.05fr 1fr;
  gap:52px;
  align-items:center;
}
body.page-kaifeng .kf-hero-media{
  position:relative;
}
body.page-kaifeng .kf-hero-media::after{
  content:"";
  position:absolute;inset:14px -14px -14px 14px;
  border:1.5px solid var(--c-purple-300);
  border-radius:var(--radius-lg);
  z-index:0;
}
body.page-kaifeng .kf-hero-media img{
  position:relative;z-index:1;
  border-radius:var(--radius-lg);
  box-shadow:var(--shadow-soft);
  width:100%;
}
body.page-kaifeng .kf-hero-text h1{margin:16px 0 14px;font-weight:800;max-width:520px}
body.page-kaifeng .kf-hero-desc{font-size:15.5px;line-height:1.9;max-width:520px}
body.page-kaifeng .kf-hero-note{margin-top:18px;font-size:14px;color:var(--c-muted)}

/* ---------- 服务网格 ---------- */
body.page-kaifeng .kf-svc-grid{
  display:grid;
  grid-template-columns:repeat(4,1fr);
  gap:20px;
}
body.page-kaifeng .kf-svc{
  background:#fff;border:1px solid var(--c-line);
  border-radius:var(--radius-md);padding:26px 22px;
  transition:transform .35s var(--ease),box-shadow .35s var(--ease);
}
body.page-kaifeng .kf-svc:hover{transform:translateY(-6px);box-shadow:var(--shadow-card)}
body.page-kaifeng .kf-svc h3{font-size:17px;margin-bottom:8px}
body.page-kaifeng .kf-svc p{font-size:13.5px;line-height:1.8}
body.page-kaifeng .kf-svc em{font-style:normal;display:block;margin-top:12px;font-size:13px;font-weight:700;color:var(--c-purple-400)}

/* ---------- 开封特色三栏 ---------- */
body.page-kaifeng .kf-profile{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:22px;
}
body.page-kaifeng .kf-profile-item{
  background:#fff;border:1px solid var(--c-line);border-radius:var(--radius-md);padding:28px 24px;
  border-top:3px solid var(--grad-main);
}
body.page-kaifeng .kf-profile-no{
  display:inline-flex;align-items:center;justify-content:center;
  width:38px;height:38px;border-radius:50%;
  background:var(--grad-main);color:#fff;font-weight:800;margin-bottom:16px;
}
body.page-kaifeng .kf-profile-item h3{font-size:18px;margin-bottom:10px}
body.page-kaifeng .kf-profile-item p{font-size:14px;line-height:1.9}
body.page-kaifeng .kf-profile-item a{color:var(--c-purple-400);border-bottom:1px dashed var(--c-purple-300)}

/* ---------- 案例横卷轴 ---------- */
body.page-kaifeng .kf-case{
  flex:0 0 340px;
  background:#fff;border:1px solid var(--c-line);border-radius:var(--radius-lg);overflow:hidden;
}
body.page-kaifeng .kf-case img{width:100%;height:auto}
body.page-kaifeng .kf-case-body{padding:22px 22px 26px}
body.page-kaifeng .kf-case-body h3{font-size:18px;margin:10px 0 8px}
body.page-kaifeng .kf-case-body p{font-size:13.5px;line-height:1.8}

/* ---------- 优势清单 ---------- */
body.page-kaifeng .kf-adv-list{
  border-top:1px solid var(--c-line);
}
body.page-kaifeng .kf-adv-row{
  display:grid;
  grid-template-columns:140px 1fr;
  gap:24px;
  padding:22px 0;
  border-bottom:1px solid var(--c-line);
  align-items:baseline;
}
body.page-kaifeng .kf-adv-label{
  font-weight:800;color:var(--c-ink);font-size:16px;
  background:var(--c-bg-pink);display:inline-block;
  border-radius:8px;padding:6px 14px;text-align:center;
}
body.page-kaifeng .kf-adv-row p{font-size:14.5px;line-height:1.9}

/* ---------- FAQ 折叠 ---------- */
body.page-kaifeng .kf-faq{
  border:1px solid var(--c-line);border-radius:var(--radius-md);overflow:hidden;
}
body.page-kaifeng .kf-faq details{border-bottom:1px solid var(--c-line);background:#fff}
body.page-kaifeng .kf-faq details:last-child{border-bottom:0}
body.page-kaifeng .kf-faq summary{
  cursor:pointer;list-style:none;padding:20px 24px;font-weight:700;color:var(--c-ink);font-size:15.5px;
  display:flex;justify-content:space-between;align-items:center;gap:16px;
}
body.page-kaifeng .kf-faq summary::-webkit-details-marker{display:none}
body.page-kaifeng .kf-faq summary::after{
  content:"+";flex:none;width:26px;height:26px;border-radius:50%;
  background:var(--c-bg-purple);color:var(--c-purple-400);
  display:flex;align-items:center;justify-content:center;font-weight:700;
  transition:transform .3s var(--ease);
}
body.page-kaifeng .kf-faq details[open] summary::after{transform:rotate(45deg)}
body.page-kaifeng .kf-faq details p{padding:0 24px 20px;font-size:14px;line-height:1.9}

/* ---------- CTA ---------- */
body.page-kaifeng .kf-cta-sec{background:var(--grad-soft)}
body.page-kaifeng .cta-box{text-align:center;padding:56px 30px}
body.page-kaifeng .cta-box h2{font-size:clamp(24px,3vw,32px);margin-bottom:14px}
body.page-kaifeng .cta-box p{max-width:640px;margin:0 auto 8px}
body.page-kaifeng .cta-note{margin-top:16px;font-size:13.5px;color:var(--c-muted)}

/* ---------- 响应式：1200 / 768 / 360 ---------- */
@media (max-width:1200px){
  body.page-kaifeng .kf-svc-grid{grid-template-columns:repeat(2,1fr)}
  body.page-kaifeng .kf-profile{grid-template-columns:1fr}
}
@media (max-width:768px){
  body.page-kaifeng .kf-hero{padding:56px 0 64px}
  body.page-kaifeng .kf-hero-in{grid-template-columns:1fr;gap:32px}
  body.page-kaifeng .kf-hero-media::after{inset:10px -8px -8px 8px}
  body.page-kaifeng .kf-adv-row{grid-template-columns:1fr;gap:8px}
}
@media (max-width:360px){
  body.page-kaifeng .kf-svc-grid{grid-template-columns:1fr}
  body.page-kaifeng .kf-case{flex-basis:280px}
  body.page-kaifeng .cta-box{padding:36px 16px}
}