/* ==========================================================================
   台宝泵业 · 首页「案例新闻」模块（仿拓流新闻版式）
   结构：右对齐标题 + 左侧分类卡(案例/新闻 MORE+) + 中间头条与列表 + 右侧常见问题
   ========================================================================== */

.nb{position:relative}
.nb__head{
  display:flex;flex-direction:column;align-items:flex-end;text-align:right;
  margin-bottom:30px;
}
.nb__head h2{
  margin:0 0 8px;font-size:31px;font-weight:800;letter-spacing:.02em;color:var(--ink-900);
}
.nb__head p{margin:0;font-size:15px;color:var(--ink-600)}

.nb__body{
  display:grid;grid-template-columns:220px 1fr 250px;gap:24px;align-items:stretch;
}

/* —— 左：分类卡 —— */
.nb__cats{display:flex;flex-direction:column;gap:0;border-radius:14px;overflow:hidden}
.nb__cat{
  flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:14px;
  padding:34px 16px;text-decoration:none;
}
.nb__cat--main{background:var(--blue-600);color:#fff}
.nb__cat--sub{background:#EAF1FF;color:var(--blue-700)}
.nb__cat svg{width:34px;height:34px}
.nb__cat b{font-size:18px;font-weight:700;letter-spacing:.06em}
.nb__cat span{
  display:inline-block;padding:6px 18px;border:1px solid currentColor;border-radius:6px;
  font-size:13px;letter-spacing:.14em;opacity:.9;
}
.nb__cat--sub span{border-color:rgba(11,92,255,.45)}
.nb__cat:hover b{transform:translateY(-2px)}
.nb__cat b{transition:transform .3s var(--ease)}
.nb__cat.is-on{box-shadow:0 10px 24px -10px rgba(11,92,255,.55)}
.nb__cat--sub.is-on{background:#D6E5FF}
.nb__cat{cursor:pointer}

/* —— 中：头条 + 列表 —— */
.nb__main{
  background:#fff;border:1px solid var(--line);border-radius:16px;padding:26px 28px;
  display:flex;flex-direction:column;
}
.nb__pane{display:none}
.nb__pane.is-on{display:flex;flex-direction:column;animation:pmIn .4s var(--ease)}
.nb__feat{
  display:grid;grid-template-columns:300px 1fr;gap:24px;align-items:start;
  text-decoration:none;
}
.nb__feat-img{
  border-radius:12px;overflow:hidden;background:#F7F9FD;height:190px;
  display:flex;align-items:center;justify-content:center;
}
.nb__feat-img img{width:100%;height:100%;object-fit:cover;transition:transform .5s var(--ease)}
.nb__feat:hover .nb__feat-img img{transform:scale(1.05)}
.nb__feat-date{font-size:20px;font-weight:700;color:var(--blue-600);letter-spacing:.01em}
.nb__feat h3{
  margin:10px 0 12px;font-size:21px;line-height:1.45;font-weight:700;color:var(--ink-900);
}
.nb__feat:hover h3{color:var(--blue-600)}
.nb__feat p{margin:0;font-size:14.5px;line-height:1.85;color:var(--ink-600);
  display:-webkit-box;-webkit-line-clamp:4;-webkit-box-orient:vertical;overflow:hidden}

.nb__list{list-style:none;margin:0;padding:0;margin-top:22px}
.nb__list li{border-top:1px solid var(--line-2)}
.nb__list a{
  display:flex;align-items:center;gap:12px;padding:15px 2px;text-decoration:none;
  transition:background .2s var(--ease);
}
.nb__list a:hover{background:#F7F9FD}
.nb__list a::before{
  content:"";flex:0 0 7px;width:7px;height:7px;border-radius:50%;background:var(--blue-600);
}
.nb__list h4{
  flex:1;margin:0;font-size:15.5px;font-weight:500;color:var(--ink-900);
  white-space:nowrap;overflow:hidden;text-overflow:ellipsis;
}
.nb__list a:hover h4{color:var(--blue-600)}
.nb__list time{flex:0 0 auto;font-size:13px;color:var(--ink-600)}

/* —— 右：常见问题 —— */
.nb__qa{
  background:#fff;border:1px solid var(--line);border-radius:16px;padding:24px;
  display:flex;flex-direction:column;
}
.nb__qa h3{margin:0 0 6px;font-size:18px;font-weight:700;color:var(--ink-900)}
.nb__qa-sub{margin:0 0 16px;font-size:12.5px;color:var(--ink-600)}
.nb__qa-item{
  display:flex;gap:10px;padding:13px 0;border-top:1px dashed var(--line-2);text-decoration:none;
}
.nb__qa-item:first-of-type{border-top:0;padding-top:4px}
.nb__qa-badge{
  flex:0 0 24px;width:24px;height:24px;border-radius:6px;font-size:12px;font-weight:700;
  display:flex;align-items:center;justify-content:center;margin-top:2px;
}
.nb__qa-badge--q{background:#FFE9E3;color:#E24A2B}
.nb__qa-badge--a{background:#E5F3E8;color:#2E9E4F}
.nb__qa-item p{margin:0;font-size:14px;line-height:1.65;color:var(--ink-700);
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.nb__qa-item:hover p{color:var(--blue-600)}
.nb__qa-more{
  margin-top:auto;padding-top:14px;text-align:center;font-size:14px;color:var(--blue-600);
  text-decoration:none;font-weight:600;
}
.nb__qa-more:hover{text-decoration:underline}

/* —— 响应式 —— */
@media (max-width:1180px){
  .nb__body{grid-template-columns:180px 1fr 220px}
  .nb__feat{grid-template-columns:240px 1fr}
}
@media (max-width:992px){
  .nb__head{align-items:flex-start;text-align:left}
  .nb__body{grid-template-columns:1fr}
  .nb__cats{flex-direction:row}
  .nb__cat{padding:22px 14px}
  .nb__feat{grid-template-columns:1fr}
  .nb__feat-img{height:220px}
}