vy:#0b1f3a;
  --navy2:#102a4f;
  --bg:#f0f2f5;
  --card:#ffffff;
  --text:#111827;
  --muted:#6b7280;
  --line:#e5e7eb;
  --link:#1b74e4;
}

*{box-sizing:border-box}
body{
  margin:0;
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,"PingFang SC","Microsoft YaHei",sans-serif;
  background:var(--bg);background:#f0f2f5;
  color:var(--text);
}
a{color:var(--link);text-decoration:none}
a:hover{text-decoration:underline}

.topbar{
  position:sticky;
  top:0;
  z-index:1000;
  background:#0b1f3a;      /* 藏蓝色 */
  color:#ffffff;
  border-bottom:1px solid rgba(255,255,255,0.08);
  box-shadow:0 2px 6px rgba(0,0,0,0.15);
}

.topbar a{
  color:#ffffff;
}

.topbar a:hover{
  color:#c7d7ff;
  text-decoration:none;
}

.topbar-inner{
  max-width:1200px;
  margin:0 auto;
  padding:12px 16px;
  display:flex;
  align-items:center;
  justify-content:space-between;
}

.brand{
  color:#fff; font-weight:700; font-size:20px;letter-spacing:.2px;
  display:flex; align-items:center; gap:10px;
}
.brand .logo{
  width:28px; height:28px; border-radius:8px;
  background:linear-gradient(180deg,#1b74e4, #0ea5e9);
  display:inline-block;
}
.navlinks{display:flex; gap:10px; align-items:center; flex-wrap:wrap}
.navlinks a{
  color:#e5e7eb;
  padding:7px 10px;
  border-radius:999px;
  display:inline-flex; align-items:center; gap:8px;
}
.navlinks a:hover{background:rgba(255,255,255,.10); text-decoration:none}
.navlinks a.homebtn{
  background:rgba(255,255,255,.14);
  border:1px solid rgba(255,255,255,.12);
}

.shell{max-width:1200px;margin:0 auto;padding:16px 14px}
.grid{
  display:grid;
  grid-template-columns: 260px 1fr 320px;
  gap:14px;
}
@media (max-width: 980px){
  .grid{grid-template-columns:1fr}
  .col-left,.col-right{display:none}
}

.panel{
  background:var(--card);
  border:1px solid var(--line);
  border-radius:14px;
  padding:12px;
}
.panel h3{margin:0 0 10px 0; font-size:14px; color:#111}
.panel .item{padding:8px 0; border-top:1px solid var(--line)}
.panel .item:first-child{border-top:none}
.meta{color:var(--muted); font-size:12px}

.feed{display:flex; flex-direction:column; gap:10px}
.card{
  background:#ffffff;
  border-radius:8px;
  padding:18px;
  margin-bottom:16px;
  box-shadow:0 1px 2px rgba(0,0,0,0.08);
  transition:all 0.2s ease;
}
.card:hover{
  box-shadow:0 3px 8px rgba(0,0,0,0.12);
}
.card .title{font-weight:700; line-height:1.35}
.card .desc{color:#374151; margin-top:6px; line-height:1.6}
.card .row{display:flex; justify-content:space-between; align-items:center; gap:10px; margin-top:10px}
.badge{
  font-size:12px; color:#fff; background:var(--navy2);
  padding:3px 8px; border-radius:999px;
}
.smallbtn{
  font-size:12px; color:var(--navy);
  background:#e8f0ff;
  padding:6px 10px; border-radius:999px;
  display:inline-block;
}
.sidebar-title{
  font-size:14px;
  font-weight:600;
  text-transform:uppercase;
  letter-spacing:0.5px;
  color:#6b7280;
  margin-bottom:10px;
}
.footer{margin:18px 0; color:var(--muted); font-size:12px}

/* Home 3-column layout */
.page{display:flex;gap:16px;align-items:flex-start}
.sidebar{width:200px;position:sticky;top:72px}
.rightcol{width:450px;position:sticky;top:72px}
.main{flex:1;min-width:100}

.sidebox{background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.10);border-radius:12px;padding:12px}
.side-title{font-weight:700;margin:8px 0 6px}
.side-link{display:block;padding:8px 10px;border-radius:10px;color:inherit;text-decoration:none}
.side-link:hover{background:rgba(255,255,255,.10)}
.side-sep{height:1px;background:rgba(255,255,255,.10);margin:10px 0}

.panel{margin-bottom:16px}
.cards{display:flex;flex-direction:column;gap:10px}
.card{background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.10);border-radius:12px;padding:12px}
.card-title{font-weight:700;text-decoration:none;color:inherit}
.card-title:hover{text-decoration:underline}
.card-meta{opacity:.8;font-size:12px;margin-top:6px}
.card-text{margin-top:8px;line-height:1.5;opacity:.95}
.muted{opacity:.75;font-size:12px;margin-top:6px}

/* Responsive */
@media (max-width: 900px){
  .page{flex-direction:column}
  .sidebar,.rightcol{width:auto;position:static}
}