@charset "utf-8";
/* ==========================================================================
   妙排网络 · SEO博客列表页（blog.css）
   主题：青绿到蓝内容风 / 居中首屏 + 分类标签导航 / 文章卡片三列
   ========================================================================== */

/* ---------- 1. 主题变量覆盖 ---------- */
:root{
  --brand:#0369A1;
  --brand-2:#0F766E;
  --accent:#F97316;
  --ink:#0B2530;
  --text:#12303C;
  --muted:#5A7280;
  --bg:#FFFFFF;
  --bg-soft:#F2F8FA;
  --surface:#FFFFFF;
  --surface-2:#F5FAFC;
  --border:rgba(11,37,48,.12);
  --border-strong:rgba(11,37,48,.20);
  --head-bg:rgba(255,255,255,.94);
  --head-text:#0B2530;
  --head-border:rgba(11,37,48,.08);
  --nav-hover-bg:rgba(3,105,161,.09);
  --foot-bg:#062430;
  --foot-text:#B6CDD6;
  --foot-head:#FFFFFF;
  --foot-border:rgba(255,255,255,.10);
}

/* ---------- 2. 首屏（居中标题 + 分类标签导航） ---------- */
.blg-hero{
  position:relative;overflow:hidden;text-align:center;
  padding:clamp(44px,6vw,88px) 0 clamp(32px,4.4vw,58px);
  background:
    radial-gradient(700px 380px at 50% -8%,rgba(15,118,110,.16),transparent 66%),
    radial-gradient(520px 340px at 96% 90%,rgba(249,115,22,.10),transparent 62%),
    linear-gradient(180deg,var(--bg-soft) 0%,#FFFFFF 100%);
}
.blg-hero .container{position:relative;z-index:1}
.blg-hero h1{margin:16px auto 18px;max-width:880px}
.blg-hero .hero-lead{margin:0 auto;max-width:800px;text-align:left}
.blg-tags{display:flex;flex-wrap:wrap;gap:10px;justify-content:center;margin-top:clamp(22px,3vw,32px)}
.blg-tags a{
  display:inline-flex;align-items:center;gap:7px;
  padding:9px 18px;border-radius:var(--radius-pill);
  background:#fff;border:1px solid var(--border);
  font-size:13.6px;font-weight:700;color:var(--brand);
  transition:transform .2s,border-color .2s,background .2s;
}
.blg-tags a:hover{transform:translateY(-3px);border-color:var(--brand);background:var(--nav-hover-bg)}
.blg-tags a::before{content:"";width:7px;height:7px;border-radius:50%;background:var(--accent)}
.blg-hero-visual{max-width:880px;margin:clamp(26px,3.6vw,44px) auto 0}
.blg-hero-visual img{
  width:100%;border-radius:22px;border:1px solid var(--border);
  box-shadow:0 26px 62px rgba(6,36,48,.16);
}

/* ---------- 3. 文章卡片（每行 3 张） ---------- */
.blg-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.blg-card{
  display:flex;flex-direction:column;overflow:hidden;
  background:var(--surface);border:1px solid var(--border);border-radius:18px;
  transition:transform .25s,box-shadow .25s,border-color .25s;
}
.blg-card:hover{transform:translateY(-6px);box-shadow:0 24px 56px rgba(6,36,48,.14);border-color:var(--border-strong)}
.blg-thumb{aspect-ratio:16/9;overflow:hidden;background:var(--surface-2);border-bottom:1px solid var(--border)}
.blg-thumb img{width:100%;height:100%;object-fit:cover}
.blg-body{padding:20px 22px 22px;display:flex;flex-direction:column;flex:1}
.blg-cat{
  align-self:flex-start;display:inline-block;padding:4px 12px;border-radius:var(--radius-pill);
  font-size:12.3px;font-weight:800;color:var(--brand-2);background:rgba(15,118,110,.10);
  border:1px solid rgba(15,118,110,.18);
}
.blg-card h3{font-size:17px;margin:12px 0 9px;line-height:1.45}
.blg-card h3 a{color:var(--ink)}
.blg-card h3 a:hover{color:var(--brand)}
.blg-card p{font-size:14.1px;color:var(--muted);flex:1;margin:0}
.blg-foot{
  margin-top:16px;padding-top:14px;border-top:1px dashed var(--border);
  display:flex;flex-wrap:wrap;gap:8px;justify-content:space-between;align-items:center;
  font-size:12.8px;color:var(--muted);
}
.blg-foot a{font-weight:800;color:var(--brand)}
.blg-foot a:hover{color:var(--accent)}
.blg-note{margin-top:24px;font-size:13px;color:var(--muted);text-align:center}

/* ---------- 4. 读者对象 / 写作原则（编号条） ---------- */
.blg-who{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.blg-who article{
  background:var(--surface);border:1px solid var(--border);border-radius:16px;
  padding:22px;border-bottom:3px solid var(--brand-2);
}
.blg-who h3{font-size:16.5px;margin-bottom:8px}
.blg-who p{font-size:14.1px;color:var(--muted)}
.blg-who article>img{width:100%;border-radius:12px;border:1px solid var(--border);margin-bottom:14px}
.blg-rule{display:grid;grid-template-columns:repeat(2,1fr);gap:16px}
.blg-rule li{
  display:grid;grid-template-columns:44px 1fr;gap:12px;align-items:start;
  background:var(--surface-2);border:1px solid var(--border);border-radius:14px;padding:18px 20px;
}
.blg-rule b{color:var(--brand);font-size:14.5px;font-weight:800}
.blg-rule h3{font-size:15.6px;margin-bottom:5px}
.blg-rule p{font-size:13.9px;color:var(--muted)}

/* ---------- 5. 五步落地 ---------- */
.blg-path{display:grid;grid-template-columns:repeat(5,1fr);gap:14px}
.blg-path article{
  position:relative;background:var(--surface);border:1px solid var(--border);
  border-radius:16px;padding:22px 18px;
}
.blg-path article::after{
  content:"";position:absolute;right:-9px;top:34px;width:14px;height:14px;
  border-top:2.4px solid var(--brand-2);border-right:2.4px solid var(--brand-2);
  transform:rotate(45deg);opacity:.5;
}
.blg-path article:last-child::after{display:none}
.blg-path b{
  display:grid;place-items:center;width:36px;height:36px;border-radius:11px;
  background:linear-gradient(135deg,var(--brand),var(--brand-2));color:#fff;font-size:13.5px;font-weight:800;
  margin-bottom:13px;
}
.blg-path h3{font-size:15.8px;margin-bottom:7px}
.blg-path p{font-size:13.7px;color:var(--muted)}

/* ---------- 6. 底部辅助模块（热门服务 + 常见问题） ---------- */
.blg-aside{display:grid;grid-template-columns:1.02fr .98fr;gap:24px;align-items:start}
.blg-box{background:var(--surface);border:1px solid var(--border);border-radius:20px;padding:26px 24px}
.blg-box h2{font-size:20px;margin-bottom:8px}
.blg-box .sub{font-size:13.6px;color:var(--muted);margin-bottom:18px}
.blg-hot{display:flex;flex-wrap:wrap;gap:10px}
.blg-hot a{
  padding:10px 16px;border-radius:12px;font-size:13.6px;font-weight:700;
  background:var(--surface-2);border:1px solid var(--border);color:var(--brand);
}
.blg-hot a:hover{border-color:var(--brand);background:var(--nav-hover-bg)}
.blg-box .faq{max-width:none;margin:0}
.blg-box .faq details{padding:0 18px}
.blg-box .faq summary{font-size:15.2px;padding:16px 30px 16px 0}
.blg-box .faq .faq-body{font-size:14px}

/* ---------- 7. 响应式 ---------- */
@media (max-width:1080px){
  .blg-grid,.blg-who{grid-template-columns:1fr 1fr}
  .blg-path{grid-template-columns:1fr 1fr}
  .blg-path article::after{display:none}
  .blg-aside,.blg-rule{grid-template-columns:1fr}
  .blg-hero .hero-lead{padding:0 4px}
}
@media (max-width:720px){
  .blg-hero{padding:34px 0 28px}
  .blg-grid,.blg-who,.blg-path{grid-template-columns:1fr}
  .blg-body{padding:18px}
  .blg-tags{gap:8px}
  .blg-tags a{font-size:13px;padding:8px 14px}
  .blg-box{padding:20px 18px}
  .blg-rule li{grid-template-columns:1fr;gap:4px}
}