:root{
  --paper:#FBF9F5;
  --surface:#FFFFFF;
  --ink:#1E1A17;
  --ink-2:#4A423B;
  --ink-3:#8C8175;
  --brand:#2E2119;
  --accent:#5F7355;
  --accent-soft:#EEF1EA;
  --line:rgba(30,26,23,.10);
  --line-2:rgba(30,26,23,.18);
  --serif:"Source Han Serif SC","Noto Serif SC","Songti SC","STSong","SimSun",Georgia,serif;
  --sans:"PingFang SC","Microsoft YaHei","Hiragino Sans GB",system-ui,-apple-system,"Segoe UI",sans-serif;
  --wrap:1080px;
  --prose:760px;
}

*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;}
body{
  margin:0;
  background:var(--paper);
  color:var(--ink);
  font-family:var(--sans);
  font-size:16px;
  line-height:1.85;
  letter-spacing:.01em;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;}
a{color:inherit;text-decoration:none;}
h1,h2,h3,h4{font-family:var(--serif);font-weight:500;line-height:1.45;margin:0;letter-spacing:.02em;}
p{margin:0 0 1.1em;}
.wrap{width:100%;max-width:var(--wrap);margin:0 auto;padding:0 28px;}
.prose{max-width:var(--prose);}

/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:50;
  background:rgba(251,249,245,.92);
  backdrop-filter:saturate(1.4) blur(10px);
  border-bottom:.5px solid var(--line);
}
.site-header .wrap{display:flex;align-items:center;justify-content:space-between;height:72px;}
.brand{display:flex;align-items:center;gap:12px;}
/* logo 为透明底 PNG，无需 mix-blend-mode 去白 */
.brand img{height:38px;width:auto;}
.brand-sub{
  font-size:11px;letter-spacing:.22em;color:var(--ink-3);
  border-left:.5px solid var(--line-2);padding-left:12px;line-height:1.3;
}
.nav{display:flex;gap:30px;font-size:14px;}
.nav a{color:var(--ink-2);padding:4px 0;border-bottom:1px solid transparent;transition:color .2s,border-color .2s;}
.nav a:hover{color:var(--ink);border-bottom-color:var(--ink-3);}
.nav a[aria-current="page"]{color:var(--ink);border-bottom-color:var(--accent);}

/* ---------- generic ---------- */
.eyebrow{
  font-size:12px;letter-spacing:.24em;color:var(--accent);
  text-transform:uppercase;margin:0 0 18px;
}
.section{padding:96px 0;}
.section.tight{padding:64px 0;}
.section.alt{background:var(--surface);border-top:.5px solid var(--line);border-bottom:.5px solid var(--line);}
h2.title{font-size:30px;margin:0 0 20px;}
h3.sub{font-size:19px;margin:0 0 12px;}
.lead{font-size:17px;color:var(--ink-2);}
.muted{color:var(--ink-3);font-size:14px;line-height:1.75;}
.rule{height:.5px;background:var(--line);border:0;margin:56px 0;}

/* ---------- hero ---------- */
.hero{padding:120px 0 96px;}
.hero h1{font-size:52px;line-height:1.35;margin:0 0 26px;max-width:15em;}
.hero .lead{font-size:19px;max-width:34em;color:var(--ink-2);}
.hero .meta{margin-top:40px;font-size:13px;letter-spacing:.14em;color:var(--ink-3);}
.hero-actions{display:flex;gap:14px;flex-wrap:wrap;margin-top:40px;}
.btn{
  display:inline-block;padding:13px 28px;border-radius:2px;
  font-size:14px;letter-spacing:.08em;border:.5px solid var(--brand);
  background:var(--brand);color:#FBF9F5;transition:opacity .2s;
}
.btn:hover{opacity:.85;}
.btn.ghost{background:transparent;color:var(--ink);border-color:var(--line-2);}
.btn.ghost:hover{border-color:var(--ink-3);opacity:1;}

/* ---------- stat grid ---------- */
.grid{display:grid;gap:1px;background:var(--line);border:.5px solid var(--line);}
.grid.cols-3{grid-template-columns:repeat(3,minmax(0,1fr));}
.grid.cols-4{grid-template-columns:repeat(4,minmax(0,1fr));}
.cell{background:var(--paper);padding:32px 26px;}
.cell .num{font-family:var(--serif);font-size:34px;line-height:1.2;color:var(--brand);}
.cell .num small{font-size:15px;color:var(--ink-3);margin-left:6px;letter-spacing:0;}
.cell .label{font-size:13px;color:var(--ink-3);letter-spacing:.1em;margin-top:10px;}
.cell p{font-size:14px;color:var(--ink-2);margin:10px 0 0;line-height:1.75;}

/* ---------- cards ---------- */
.cards{display:grid;gap:24px;}
.cards.c3{grid-template-columns:repeat(3,minmax(0,1fr));}
.cards.c2{grid-template-columns:repeat(2,minmax(0,1fr));}
.card{
  background:var(--surface);border:.5px solid var(--line);
  border-radius:3px;padding:34px 30px;
}
.card .k{font-size:12px;letter-spacing:.2em;color:var(--accent);margin:0 0 14px;}
.card h3{font-size:20px;margin:0 0 12px;}
.card p{font-size:14.5px;color:var(--ink-2);margin:0;line-height:1.8;}

/* ---------- timeline ---------- */
.timeline{position:relative;margin:0;padding:0 0 0 0;list-style:none;}
.tl-item{position:relative;padding:0 0 46px 40px;border-left:.5px solid var(--line-2);}
.tl-item:last-child{border-left-color:transparent;padding-bottom:0;}
.tl-item::before{
  content:"";position:absolute;left:-5px;top:9px;
  width:9px;height:9px;border-radius:50%;
  background:var(--paper);border:1.5px solid var(--accent);
}
.tl-item .yr{font-family:var(--serif);font-size:22px;color:var(--brand);line-height:1.3;}
.tl-item .tag{font-size:12px;letter-spacing:.16em;color:var(--ink-3);margin-left:12px;}
.tl-item h3{font-size:17px;margin:8px 0 8px;}
.tl-item p{font-size:14.5px;color:var(--ink-2);margin:0;max-width:44em;}

/* ---------- table ---------- */
table{width:100%;border-collapse:collapse;font-size:14.5px;}
th,td{text-align:left;padding:14px 16px;border-bottom:.5px solid var(--line);vertical-align:top;}
th{
  font-weight:400;font-size:12px;letter-spacing:.16em;color:var(--ink-3);
  border-bottom:.5px solid var(--line-2);
}
td strong{font-weight:500;}
table.tight th:first-child,table.tight td:first-child{width:32%;color:var(--ink-3);}

/* ---------- quote ---------- */
.quote{border-left:2px solid var(--accent);padding:6px 0 6px 26px;margin:0;}
.quote p{font-family:var(--serif);font-size:19px;line-height:1.8;color:var(--ink);margin:0;}
.quote cite{display:block;margin-top:16px;font-size:13px;font-style:normal;color:var(--ink-3);letter-spacing:.08em;}

/* ---------- footer ---------- */
.site-footer{background:var(--brand);color:#D9D2C9;padding:64px 0 40px;font-size:13.5px;line-height:1.9;}
.site-footer .wrap{display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:40px;}
.site-footer h4{font-family:var(--sans);font-size:12px;letter-spacing:.2em;color:#8F857A;font-weight:400;margin:0 0 16px;}
.site-footer a{color:#D9D2C9;}
.site-footer a:hover{color:#fff;}
.site-footer .fnav{display:flex;flex-direction:column;gap:9px;}
.site-footer .legal{
  margin-top:48px;padding-top:24px;border-top:.5px solid rgba(255,255,255,.14);
  display:flex;justify-content:space-between;gap:20px;flex-wrap:wrap;
  font-size:12px;color:#8F857A;
}
.site-footer .legal a{color:#8F857A;text-decoration:underline;text-underline-offset:3px;}

/* ---------- misc ---------- */
.note{
  background:var(--accent-soft);border-radius:3px;padding:22px 26px;
  font-size:14px;color:var(--ink-2);line-height:1.8;
}
.ph{color:#B9AFA3;font-style:italic;}
.tag-row{display:flex;flex-wrap:wrap;gap:8px;margin-top:18px;}
.tag{
  font-size:12px;letter-spacing:.06em;color:var(--ink-2);
  border:.5px solid var(--line-2);border-radius:999px;padding:5px 14px;
}

@media (max-width:860px){
  .hero{padding:80px 0 64px;}
  .hero h1{font-size:36px;}
  .section{padding:72px 0;}
  .grid.cols-3,.grid.cols-4,.cards.c3,.cards.c2{grid-template-columns:1fr;}
  .site-header .wrap{height:64px;}
  .brand-sub{display:none;}
  .nav{gap:18px;font-size:13px;}
  h2.title{font-size:25px;}
  .site-footer .wrap{grid-template-columns:1fr;gap:32px;}
}