:root{
  --bg: #fbfaf7;
  --surface: #ffffff;
  --text: #1f2328;
  --muted: #5e6a73;
  --border: #ece7df;
  --shadow: 0 10px 30px rgba(20, 20, 20, .06);
  --accent: #d97706; /* warm amber */
  --accent-2: #b45309;
  --radius: 18px;
  --radius-sm: 12px;
  --max: 1040px;
}

*{box-sizing:border-box}
html,body{height:100%}
body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font-family: ui-sans-serif, system-ui, -apple-system, "SF Pro SC", "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", "Noto Sans SC", Arial, sans-serif;
  line-height:1.6;
}

a{color:inherit; text-decoration:none}
a:hover{text-decoration:underline}

.skip{
  position:absolute; left:-999px; top:8px;
  padding:8px 10px; background:var(--surface);
  border:1px solid var(--border); border-radius:10px;
}
.skip:focus{left:12px; z-index:50}

.container{max-width:var(--max); margin:0 auto; padding:0 20px}

.top{
  position:sticky; top:0; z-index:20;
  backdrop-filter:saturate(180%) blur(10px);
  background:rgba(251,250,247,.7);
  border-bottom:1px solid rgba(236,231,223,.7);
}
.nav{display:flex; align-items:center; justify-content:space-between; height:64px; gap:14px}

.brand{display:flex; align-items:center; gap:10px}
.brand__avatar{
  width:36px; height:36px;
  border-radius:12px;
  background:linear-gradient(180deg,#fff,#fff7ed);
  border:1px solid var(--border);
}
.brand__name{font-weight:650; letter-spacing:.2px}

.menu{display:flex; align-items:center; gap:14px; flex-wrap:wrap}
.menu a{color:var(--muted)}
.menu a:hover{color:var(--text); text-decoration:none}

.chip{
  padding:8px 10px;
  border:1px solid var(--border);
  border-radius:999px;
  background:rgba(255,255,255,.65);
}

.hero{display:grid; grid-template-columns: 1.25fr .75fr; gap:22px; padding:42px 0 10px}

.kicker{margin:0 0 8px; color:var(--muted); font-size:14px}
.hero h1{margin:0 0 10px; font-size:42px; line-height:1.15; letter-spacing:-.4px}
.lede{margin:0 0 18px; color:var(--muted); font-size:16px}

.cta{display:flex; gap:10px; flex-wrap:wrap}
.btn{
  display:inline-flex; align-items:center; justify-content:center;
  padding:10px 14px;
  border-radius:999px;
  background:var(--text);
  color:#fff;
  border:1px solid rgba(0,0,0,.08);
  box-shadow: 0 6px 20px rgba(31,35,40,.12);
}
.btn:hover{text-decoration:none; transform:translateY(-1px)}
.btn--ghost{
  background:rgba(255,255,255,.6);
  color:var(--text);
  border:1px solid var(--border);
  box-shadow:none;
}

.meta{margin:14px 0 0; color:var(--muted); font-size:13px}

.section{padding:34px 0}
.section__head{margin-bottom:14px}
.section__head h2{margin:0 0 6px; font-size:22px; letter-spacing:-.2px}

.muted{color:var(--muted)}

.card{
  background:rgba(255,255,255,.65);
  border:1px solid var(--border);
  border-radius:var(--radius);
  padding:16px;
  box-shadow: var(--shadow);
}

.hero__card .card{padding:14px}
.card__row{display:flex; align-items:flex-start; justify-content:space-between; gap:12px; padding:10px 0; border-bottom:1px solid rgba(236,231,223,.65)}
.card__row:last-child{border-bottom:none}
.label{color:var(--muted); font-size:13px; white-space:nowrap}
.value{font-size:14px}

.grid{display:grid; grid-template-columns:repeat(3, 1fr); gap:14px}
.tile{
  background:rgba(255,255,255,.65);
  border:1px solid var(--border);
  border-radius:var(--radius);
  padding:16px;
  box-shadow: var(--shadow);
  transition:transform .15s ease, box-shadow .15s ease;
}
.tile:hover{transform:translateY(-2px); box-shadow: 0 14px 36px rgba(20,20,20,.08)}
.tile h3{margin:0 0 8px; font-size:16px}
.tile p{margin:0; color:var(--muted)}

.tile--link{display:block; text-decoration:none}
.tile--link:hover{text-decoration:none}

.tile__top{display:flex; align-items:center; justify-content:space-between; gap:10px; margin-bottom:8px}
.tile__links{margin-top:10px}
.tile__links a{color:var(--accent)}
.tile__links a:hover{color:var(--accent-2)}

.list{display:flex; flex-direction:column; gap:12px}
.post{
  background:rgba(255,255,255,.65);
  border:1px solid var(--border);
  border-radius:var(--radius);
  padding:16px;
  box-shadow: var(--shadow);
}
.post h3{margin:6px 0 8px; font-size:18px}
.post__meta{display:flex; align-items:center; gap:8px; flex-wrap:wrap; color:var(--muted); font-size:13px}
.dot{opacity:.6}
.tag{
  display:inline-flex; align-items:center;
  padding:2px 10px;
  border:1px solid rgba(236,231,223,.85);
  border-radius:999px;
  background:rgba(255,255,255,.55);
}

summary{cursor:pointer; color:var(--accent); margin-top:8px}
summary:hover{color:var(--accent-2)}

.prose{margin-top:10px; color:var(--muted)}
.prose strong{color:var(--text)}

.pill{
  display:inline-flex; align-items:center;
  padding:2px 10px;
  border-radius:999px;
  font-size:12px;
  border:1px solid rgba(0,0,0,.08);
}
.pill--active{background:rgba(217,119,6,.12); color:#7c2d12; border-color:rgba(217,119,6,.25)}
.pill--thinking{background:rgba(15,118,110,.10); color:#115e59; border-color:rgba(15,118,110,.22)}

.contact{display:grid; grid-template-columns:repeat(3, 1fr); gap:14px}

.footer{padding:18px 0 44px; border-top:1px solid rgba(236,231,223,.7); margin-top:20px}

@media (max-width: 920px){
  .hero{grid-template-columns:1fr; padding-top:26px}
  .hero h1{font-size:34px}
  .grid{grid-template-columns:1fr}
  .contact{grid-template-columns:1fr}
}