/* 51吃瓜网 v7 - 快报瀑布骨架 */
:root{
  --bg:#f4f6fb;
  --surface:#fff;
  --line:#e7ecf4;
  --text:#1f2937;
  --muted:#677489;
  --p:#e33b56;
  --p2:#316dff;
  --chip:#eff4ff;
  --max:1180px;
}
*{box-sizing:border-box}
body{
  margin:0;
  font-family:"Microsoft YaHei","PingFang SC",-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;
  color:var(--text);
  background:linear-gradient(180deg,#f8faff 0,#f4f6fb 40%,#f4f6fb 100%);
  line-height:1.72;
  min-height:100vh;
  display:flex;
  flex-direction:column;
}
a{color:inherit;text-decoration:none}
a:hover{text-decoration:underline}
img{max-width:100%;display:block;height:auto}
.container{width:min(100% - 28px,var(--max));margin-inline:auto}
main{flex:1}

.topbar{position:sticky;top:0;z-index:99;background:rgba(255,255,255,.95);border-bottom:1px solid var(--line);backdrop-filter:blur(8px)}
.topbar-inner{display:flex;align-items:center;justify-content:space-between;gap:10px;flex-wrap:wrap;padding:12px 0}
.brand{display:flex;align-items:center;gap:10px}
.logo{width:38px;height:38px;border-radius:10px;background:linear-gradient(135deg,var(--p),#ff8a5b);display:grid;place-items:center;color:#fff;font-weight:900}
.brand small{display:block;color:var(--muted);font-size:.8rem}
.nav{display:flex;gap:8px;flex-wrap:wrap}
.nav a{padding:8px 10px;border-radius:9px;color:var(--muted);font-size:.9rem;font-weight:700}
.nav a[aria-current="page"],.nav a:hover{background:var(--p2);color:#fff;text-decoration:none}

/* 新骨架：首页 */
.tag-strip{
  margin:12px 0 10px;
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:12px;
  padding:10px;
  display:flex;flex-wrap:wrap;gap:8px;align-items:center;
}
.tag-strip strong{font-size:.9rem;color:#3b4a63}
.tag-strip a{background:var(--chip);border:1px solid #dce7ff;border-radius:999px;padding:4px 10px;font-size:.82rem;color:#315aa8}

.waterfall-shell{
  display:grid;
  grid-template-columns:1fr;
  gap:12px;
}
@media(min-width:1080px){
  .waterfall-shell{grid-template-columns:1.15fr .85fr}
}
.lead-board{
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:14px;
  overflow:hidden;
}
.lead-board img{width:100%;aspect-ratio:21/9;object-fit:cover}
.lead-body{padding:12px}
.lead-body h1{margin:0 0 10px;font-size:clamp(1.45rem,2.9vw,2rem);line-height:1.32}
.lead-body p{margin:0 0 10px;color:#314157}
.lead-metrics{display:grid;grid-template-columns:repeat(2,1fr);gap:8px}
@media(min-width:620px){.lead-metrics{grid-template-columns:repeat(4,1fr)}}
.lead-metrics div{background:#f2f6ff;border:1px solid #dce6ff;border-radius:10px;padding:9px}
.lead-metrics strong{display:block;font-size:.93rem}
.lead-metrics span{display:block;color:var(--muted);font-size:.8rem;margin-top:4px}

.side-columns{display:grid;grid-template-columns:1fr;gap:12px}
.box{background:var(--surface);border:1px solid var(--line);border-radius:12px;padding:12px}
.box h3{margin:0 0 8px}
.box ul{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:8px}
.box li{background:#f9fbff;border:1px solid var(--line);border-radius:8px;padding:8px;color:#42566f;font-size:.86rem}

.section{padding:12px 0 18px}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:10px;flex-wrap:wrap;margin-bottom:10px}
.section-head h2{margin:0;font-size:1.16rem}
.section-head p{margin:0;color:var(--muted);font-size:.9rem;max-width:64ch}
.grid{display:grid;grid-template-columns:1fr;gap:10px}
@media(min-width:860px){.grid{grid-template-columns:repeat(2,1fr)}}
.card{background:var(--surface);border:1px solid var(--line);border-radius:12px;overflow:hidden;display:grid;grid-template-columns:1fr}
@media(min-width:560px){.card{grid-template-columns:170px 1fr}}
.card img{width:100%;height:100%;min-height:120px;object-fit:cover}
.body{padding:10px}
.meta{display:flex;gap:8px;flex-wrap:wrap;color:var(--muted);font-size:.78rem;margin-bottom:6px}
.chip{padding:2px 7px;border-radius:999px;background:#edf8f5;border:1px solid #cceee3;color:#0f7f5f;font-weight:700}
.chip.warn{background:#fff1f3;border-color:#ffd7dd;color:#b52138}
.chip.info{background:#eef4ff;border-color:#dbe6ff;color:#224d9a}
.body h3{margin:0 0 6px;font-size:.98rem;line-height:1.4}
.body p{margin:0;color:#4b5d74;font-size:.9rem}

.article{padding:16px 0 22px}
.crumb{color:var(--muted);font-size:.84rem;margin-bottom:10px}
.article-head,.cover,.prose{background:var(--surface);border:1px solid var(--line);border-radius:12px}
.article-head{padding:12px}
.article-head h1{margin:0 0 8px;font-size:clamp(1.22rem,2.5vw,1.55rem)}
.article-head p{margin:0;color:#4b5d74}
.cover{margin-top:10px;overflow:hidden}
.cover img{width:100%;aspect-ratio:21/9;object-fit:cover}
.prose{margin-top:10px;padding:12px;color:#334155}
.prose h2{margin:1.3em 0 .55em;font-size:1.04rem;color:#15202f}
.prose p{margin:0 0 .95em}
.prose ul{margin:0 0 .95em;padding-left:1.2em}
.related{margin-top:10px;display:flex;flex-direction:column;gap:6px}
.related a{color:var(--p2)}

.footer{margin-top:auto;background:#fff;border-top:1px solid var(--line);padding:18px 0 14px}
.footer-grid{display:grid;grid-template-columns:1fr;gap:12px}
@media(min-width:760px){.footer-grid{grid-template-columns:1.4fr 1fr 1fr}}
.footer h4{margin:0 0 8px;font-size:.9rem}
.footer p{margin:0;color:var(--muted);font-size:.88rem;line-height:1.75}
.footer ul{list-style:none;margin:0;padding:0}
.footer li{margin-bottom:6px}
.fine{margin-top:10px;padding-top:10px;border-top:1px solid var(--line);text-align:center;color:#8a94a6;font-size:.82rem}

/* 列表页：多泳道看板骨架 */
.lane-shell{
  display:grid;
  grid-template-columns:1fr;
  gap:12px;
  padding:12px 0 18px;
}
@media(min-width:980px){
  .lane-shell{grid-template-columns:repeat(3,1fr)}
}
.lane{
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:12px;
  padding:10px;
}
.lane h3{
  margin:0 0 8px;
  font-size:.98rem;
}
.lane-note{
  margin:0 0 10px;
  color:var(--muted);
  font-size:.84rem;
}
.lane-list{
  list-style:none;
  margin:0;
  padding:0;
  display:flex;
  flex-direction:column;
  gap:8px;
}
.lane-item{
  border:1px solid var(--line);
  background:#fafcff;
  border-radius:10px;
  padding:9px;
}
.lane-item .mini{
  display:flex;
  gap:6px;
  flex-wrap:wrap;
  margin-bottom:6px;
  color:var(--muted);
  font-size:.76rem;
}
.dot{
  display:inline-flex;
  padding:2px 7px;
  border-radius:999px;
  background:#eef4ff;
  border:1px solid #dce7ff;
  color:#315aa8;
  font-weight:700;
}

/* 极明显的新骨架：首页“单页多面板（:target）” */
.tab-nav{
  margin:12px 0 10px;
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:12px;
  padding:10px;
  display:flex;
  flex-wrap:wrap;
  gap:8px;
  align-items:center;
}
.tab-nav strong{font-size:.9rem;color:#3b4a63}
.tab-pill{
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:6px 11px;
  border-radius:999px;
  background:#f3f7ff;
  border:1px solid #dce7ff;
  color:#2b4f93;
  font-weight:800;
  font-size:.86rem;
}
.tab-pill:hover{background:#eaf1ff;text-decoration:none}
.tab-shell{
  display:grid;
  grid-template-columns:1fr;
  gap:12px;
  padding:10px 0 18px;
}
@media(min-width:1080px){
  .tab-shell{grid-template-columns:280px 1fr}
}
.tab-aside{
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:12px;
  padding:12px;
  height:max-content;
}
.tab-aside h3{margin:0 0 8px}
.tab-aside ul{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:8px}
.tab-aside li{background:#fafcff;border:1px solid var(--line);border-radius:10px;padding:9px;font-size:.86rem;color:#42566f}
.tab-panels{
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:14px;
  overflow:hidden;
}
.tab-panel{
  display:none;
  padding:12px;
}
.tab-panel h1{margin:0 0 10px;font-size:clamp(1.45rem,2.8vw,2rem);line-height:1.3}
.tab-panel h2{margin:1.1em 0 .5em;font-size:1.05rem}
.tab-panel p{margin:0 0 10px;color:#314157}
.tab-panel .mini-grid{
  display:grid;
  grid-template-columns:1fr;
  gap:10px;
}
@media(min-width:860px){
  .tab-panel .mini-grid{grid-template-columns:repeat(2,1fr)}
}
.mini-card{
  border:1px solid var(--line);
  border-radius:12px;
  overflow:hidden;
  background:#fff;
  display:grid;
  grid-template-columns:1fr;
}
@media(min-width:560px){.mini-card{grid-template-columns:160px 1fr}}
.mini-card img{width:100%;height:100%;min-height:110px;object-fit:cover}
.mini-card .inner{padding:10px}
.mini-card h3{margin:0 0 6px;font-size:.98rem}
.mini-card p{margin:0;color:#4b5d74;font-size:.9rem}

/* 默认显示总览；点击标签用 :target 切换 */
#overview{display:block}
:target.tab-panel{display:block}
/* 当有 target 时隐藏 overview（通过兄弟选择器实现） */
.tab-panels:has(:target) #overview{display:none}