:root{
  --faq-brand:#1668dc;
  --faq-brand-dark:#0b3f8f;
  --faq-brand-light:#eaf2ff;
  --faq-ink:#0f172a;
  --faq-text:#475569;
  --faq-muted:#8b98ad;
  --faq-line:#e8eef8;
  --faq-bg:#f6f9ff;
  --faq-radius:16px;
  --faq-shadow:0 6px 24px rgba(15,38,74,.07);
}
/* ---------- 版块容器 ---------- */
.faq-section{
  background:linear-gradient(180deg,#eee 0%,var(--faq-bg) 42%,var(--faq-bg) 100%);
  padding:80px 0 90px;
  position:relative;
}
.faq-wrap{max-width:1200px;margin:0 auto;padding:0 24px;}

/* ---------- 标题区 ---------- */
.faq-head{text-align:center;margin-bottom:34px;}

.faq-title{
  margin:0 0 12px;font-size:36px;line-height:1.3;font-weight:800;letter-spacing:1px;
}
.faq-title em{font-style:normal;color:var(--faq-brand);}
.faq-sub{margin:0 auto;max-width:620px;font-size:15px;line-height:1.9;color:var(--faq-muted);}
.faq-line{
  width:64px;height:4px;border-radius:4px;margin:20px auto 0;
  background:linear-gradient(90deg,var(--faq-brand),#5aa9ff);
}

/* ---------- 主体：左侧分类 + 右侧问答 ---------- */
.faq-body{display:grid;grid-template-columns:236px 1fr;gap:32px;margin-top:40px;align-items:start;}

/* 左侧分类导航 */
.faq-nav{position:sticky;top:24px;background:#fff;border:1px solid var(--faq-line);border-radius:var(--faq-radius);padding:10px;box-shadow:var(--faq-shadow);}
.faq-nav-title{font-size:13px;color:var(--faq-muted);padding:10px 14px 12px;letter-spacing:1px;}
.faq-nav-item{
  display:flex;align-items:center;justify-content:space-between;width:100%;
  padding:13px 14px;margin-bottom:4px;border:0;border-radius:10px;background:transparent;
  font-size:15px;font-family:inherit;color:var(--faq-text);cursor:pointer;text-align:left;
  transition:background .18s,color .18s;
}
.faq-nav-item:hover{background:#f3f7fd;color:var(--faq-ink);}
.faq-nav-item.active{background:var(--faq-brand-light);color:var(--faq-brand);font-weight:700;}
.faq-nav-item .faq-count{
  font-size:12px;color:var(--faq-muted);background:#f1f5fb;border-radius:999px;padding:2px 8px;
}
.faq-nav-item.active .faq-count{background:#fff;color:var(--faq-brand);}

/* 右侧问答列表 */
.faq-result-bar{font-size:14px;color:var(--faq-muted);margin:0 0 14px;display:none;}
.faq-result-bar.show{display:block;}
.faq-result-bar b{color:var(--faq-brand);}

.faq-list{display:flex;flex-direction:column;gap:12px;}
.faq-item{
  background:#fff;border:1px solid var(--faq-line);border-radius:var(--faq-radius);
  box-shadow:0 2px 10px rgba(15,38,74,.04);transition:border-color .22s,box-shadow .22s;
}
.faq-item.hide{display:none;}
.faq-item:hover{border-color:#cfe0f8;}
.faq-item.is-open{border-color:var(--faq-brand);box-shadow:0 10px 30px rgba(22,104,220,.13);}

.faq-q{
  display:flex;align-items:flex-start;gap:14px;width:100%;
  padding:20px 56px 20px 22px;position:relative;border:0;background:transparent;
  font-family:inherit;font-size:17px;font-weight:600;line-height:1.6;color:var(--faq-ink);
  cursor:pointer;text-align:left;transition:color .18s;
}
.faq-q:hover{color:var(--faq-brand);}
.faq-item.is-open .faq-q{color:var(--faq-brand);}
.faq-idx{
  flex:none;width:26px;height:26px;border-radius:8px;background:var(--faq-brand-light);
  color:var(--faq-brand);font-size:13px;font-weight:700;line-height:26px;text-align:center;margin-top:1px;
}
.faq-item.is-open .faq-idx{background:var(--faq-brand);color:#fff;}
.faq-toggle{
  position:absolute;right:20px;top:20px;width:28px;height:28px;border-radius:50%;
  border:1px solid var(--faq-line);transition:border-color .2s,background .2s;
}
.faq-toggle::before,.faq-toggle::after{
  content:"";position:absolute;left:50%;top:50%;background:var(--faq-brand);border-radius:2px;
  transition:transform .28s ease,opacity .2s;
}
.faq-toggle::before{width:12px;height:2px;transform:translate(-50%,-50%);}
.faq-toggle::after{width:2px;height:12px;transform:translate(-50%,-50%);}
.faq-item.is-open .faq-toggle{background:var(--faq-brand);border-color:var(--faq-brand);}
.faq-item.is-open .faq-toggle::before{background:#fff;}
.faq-item.is-open .faq-toggle::after{background:#fff;transform:translate(-50%,-50%) rotate(90deg);opacity:0;}

.faq-a{max-height:0;overflow:hidden;opacity:0;transition:max-height .34s cubic-bezier(.4,0,.2,1),opacity .26s ease;}
.faq-item.is-open .faq-a{opacity:1;}
.faq-a-inner{
  padding:0 56px 22px 62px;font-size:15px;line-height:1.95;color:var(--faq-text);
}
.faq-a-inner p{margin:0;}
.faq-a-inner mark{background:#fff3bf;color:inherit;border-radius:3px;padding:0 3px;}
.faq-tags{padding:0 56px 20px 62px;display:flex;flex-wrap:wrap;gap:8px;}
.faq-tag{font-size:12px;color:var(--faq-brand);background:var(--faq-brand-light);border-radius:6px;padding:4px 10px;}

.faq-empty{
  background:#fff;border:1px dashed #d7e2f2;border-radius:var(--faq-radius);
  padding:46px 24px;text-align:center;color:var(--faq-muted);font-size:15px;display:none;
}
.faq-empty.show{display:block;}
.faq-empty b{display:block;color:var(--faq-ink);font-size:17px;margin-bottom:8px;}

/* ---------- 底部咨询条 ---------- */
.faq-cta{
  margin-top:44px;border-radius:20px;padding:34px 40px;
  background:linear-gradient(120deg,var(--faq-brand-dark) 0%,var(--faq-brand) 60%,#2f8bff 100%);
  display:flex;align-items:center;justify-content:space-between;gap:24px;color:#fff;
  box-shadow:0 14px 34px rgba(11,63,143,.22);
}
.faq-cta-txt h3{margin:0 0 8px;font-size:22px;font-weight:700;}
.faq-cta-txt p{margin:0;font-size:14px;line-height:1.8;color:rgba(255,255,255,.82);}
.faq-cta-btns{display:flex;gap:12px;flex:none;}
.faq-btn{
  display:inline-flex;align-items:center;gap:8px;height:46px;padding:0 24px;border-radius:999px;
  font-size:15px;font-weight:600;font-family:inherit;cursor:pointer;text-decoration:none;
  border:1px solid transparent;transition:transform .18s,background .18s,color .18s;
}
.faq-btn:hover{transform:translateY(-2px);}
.faq-btn-solid{background:#fff;color:var(--faq-brand);}
.faq-btn-ghost{background:rgba(255,255,255,.12);color:#fff;border-color:rgba(255,255,255,.55);}
.faq-btn-ghost:hover{background:rgba(255,255,255,.22);}

/* ---------- 窄屏适配（PC 为主，兼顾平板/手机） ---------- */
@media (max-width:900px){
  .faq-section{padding:56px 0 64px;}
  .faq-title{font-size:28px;}
  .faq-body{grid-template-columns:1fr;gap:20px;}
  .faq-nav{position:static;display:flex;gap:8px;overflow-x:auto;padding:8px;}
  .faq-nav-title{display:none;}
  .faq-nav-item{white-space:nowrap;margin:0;}
  .faq-cta{flex-direction:column;align-items:flex-start;padding:28px 24px;}
  .faq-a-inner,.faq-tags{padding-left:22px;padding-right:22px;}
}
/* ===== 去掉点击后的黑框（鼠标点击不显示，键盘 Tab 仍保留可访问性） ===== */
.faq-section button:focus{ outline:none; }

/* 键盘 Tab 聚焦时改成品牌蓝，既无黑框又不丢无障碍 */
.faq-section button:focus-visible{
  outline:2px solid #1668dc;
  outline-offset:2px;
  border-radius:8px;
}