/* ============================================================
   zhengshu.css · 证书服务总览（hub）
   题头②：左右分栏；数字大卡 + 双入口大卡 + 图文交错 + 手风琴
   ============================================================ */

.narrow{ max-width:860px; margin-left:auto; margin-right:auto; }

/* ---------- 题头②：左右分栏 ---------- */
.zhead{
  padding:140px 0 80px;
  background:linear-gradient(135deg,var(--green-soft) 0%,#fff 70%);
}
.zhead-grid{ display:grid; grid-template-columns:1.15fr 1fr; gap:48px; align-items:center; }
.zhead-kicker{
  display:inline-block; font-size:13px; font-weight:700; letter-spacing:3px;
  color:var(--green-deep); margin:14px 0 12px;
}
.zhead-title{ font-size:38px; font-weight:800; line-height:1.3; }
.zhead-sub{ margin-top:16px; color:var(--ink-2); font-size:15.5px; }
.zhead-actions{ margin-top:26px; display:flex; gap:14px; flex-wrap:wrap; }
.zhead-img img{
  width:100%; height:360px; object-fit:cover; border-radius:var(--radius-lg);
  box-shadow:var(--shadow-lg);
}

/* ---------- 数字大卡：证书价值 ---------- */
.bg-soft{ background:var(--bg-soft); }
.value-grid{ display:grid; grid-template-columns:repeat(4,1fr); gap:20px; margin-top:36px; }
.value-card{
  background:#fff; border-radius:var(--radius); padding:28px 24px; box-shadow:var(--shadow-sm);
  border-bottom:4px solid var(--orange);
}
.value-card:nth-child(even){ border-bottom-color:var(--green); }
.vc-num{ display:block; font-size:24px; font-weight:800; color:var(--orange-deep); margin-bottom:10px; }
.value-card:nth-child(even) .vc-num{ color:var(--green-deep); }
.value-card p{ font-size:14px; color:var(--ink-2); }

/* ---------- 双入口大卡 ---------- */
.gate-grid{ display:grid; grid-template-columns:1fr 1fr; gap:26px; margin-top:36px; }
.gate-card{
  border-radius:var(--radius-lg); padding:40px 36px; color:#fff;
  display:flex; flex-direction:column; align-items:flex-start; gap:12px;
  box-shadow:var(--shadow-md);
}
.gate-orange{ background:linear-gradient(135deg,var(--orange) 0%,var(--orange-deep) 100%); }
.gate-green{ background:linear-gradient(135deg,var(--green) 0%,var(--green-deep) 100%); }
.gate-tag{
  font-size:12px; font-weight:700; letter-spacing:2px;
  background:rgba(255,255,255,.2); padding:4px 12px; border-radius:999px;
}
.gate-card h3{ font-size:26px; }
.gate-card p{ color:rgba(255,255,255,.92); font-size:14.5px; }
.gate-card .btn{ margin-top:10px; }

/* ---------- 电子证书图文交错 ---------- */
.bg-green{ background:var(--bg-green); }
.elec-grid{ display:grid; grid-template-columns:1.1fr 1fr; gap:44px; align-items:center; }
.elec-list{ margin-top:20px; display:flex; flex-direction:column; gap:12px; }
.elec-list li{
  position:relative; padding-left:28px; font-size:14.5px; color:var(--ink);
}
.elec-list li::before{
  content:""; position:absolute; left:0; top:9px; width:14px; height:14px;
  border-radius:50%; background:var(--green);
}
.elec-img img{
  width:100%; height:320px; object-fit:cover; border-radius:var(--radius-lg);
  box-shadow:var(--shadow-md);
}

/* ---------- 服务全程 journey ---------- */
.journey-grid{ display:grid; grid-template-columns:repeat(3,1fr); gap:20px; margin-top:36px; }
.j-item{
  background:#fff; border-radius:var(--radius); padding:28px 26px; box-shadow:var(--shadow-sm);
}
.j-item b{ display:block; font-size:18px; margin-bottom:10px; color:var(--green-deep); }
.j-item p{ font-size:14px; color:var(--ink-2); }
.j-item a{ color:var(--orange-deep); text-decoration:underline; }

/* ---------- 手风琴 ---------- */
.acc{ margin-top:30px; }
.acc-item{
  background:#fff; border:1px solid var(--line); border-radius:14px;
  margin-bottom:12px; overflow:hidden;
}
.acc-item summary{
  cursor:pointer; padding:18px 22px; font-weight:700; font-size:16px;
  list-style:none; position:relative; padding-right:44px;
}
.acc-item summary::-webkit-details-marker{ display:none; }
.acc-item summary::after{
  content:"+"; position:absolute; right:20px; top:50%; transform:translateY(-50%);
  width:26px; height:26px; border-radius:50%; background:var(--orange-soft);
  color:var(--orange-deep); display:flex; align-items:center; justify-content:center;
  font-weight:700; transition:transform .25s ease;
}
.acc-item[open] summary::after{ content:"−"; transform:translateY(-50%) rotate(180deg); }
.acc-item p{ padding:0 22px 18px; color:var(--ink-2); font-size:14.5px; }
.acc-item p a{ color:var(--orange-deep); text-decoration:underline; }

/* ---------- 行动带 ---------- */
.zcta{
  background:linear-gradient(120deg,var(--green-deep) 0%,#0B3D29 100%);
  color:#fff; padding:60px 0; text-align:center;
}
.zcta h2{ font-size:30px; margin-bottom:12px; }
.zcta p{ color:rgba(255,255,255,.88); max-width:600px; margin:0 auto 26px; }
.zcta-actions{ display:flex; gap:14px; justify-content:center; flex-wrap:wrap; }

/* ---------- 响应式 ---------- */
@media (max-width:980px){
  .zhead{ padding:120px 0 60px; }
  .zhead-grid{ grid-template-columns:1fr; gap:28px; }
  .zhead-title{ font-size:28px; }
  .value-grid{ grid-template-columns:1fr 1fr; }
  .gate-grid{ grid-template-columns:1fr; }
  .elec-grid{ grid-template-columns:1fr; gap:26px; }
  .journey-grid{ grid-template-columns:1fr; }
}
@media (max-width:640px){
  .value-grid{ grid-template-columns:1fr; }
}