:root{
    --bg:#071016;
    --bg2:#0b1720;
    --panel:#0e1d27;
    --panel2:#122530;
    --text:#eaf2f5;
    --muted:#9bb0bc;
    --line:rgba(255,255,255,.09);
    --cyan:#73e0d1;
    --gold:#f4cf76;
    --red:#ff8a8a;
    --green:#8de0a7;
    --blue:#7fb6ff;
    --shadow:0 24px 80px rgba(0,0,0,.28);
    --radius:22px;
    --max:1180px;
  }
  *{box-sizing:border-box}
  html{scroll-behavior:smooth}
  body{
    margin:0;
    color:var(--text);
    background:
      radial-gradient(900px 500px at 85% -5%, rgba(115,224,209,.11), transparent 55%),
      radial-gradient(900px 600px at -10% 20%, rgba(244,207,118,.08), transparent 55%),
      var(--bg);
    font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
    line-height:1.72;
  }
  a{color:var(--cyan);text-decoration:none}
  a:hover{text-decoration:underline}
  .progress{position:fixed;inset:0 auto auto 0;height:3px;width:0;background:linear-gradient(90deg,var(--cyan),var(--gold));z-index:100}
  .nav{
    position:sticky;top:0;z-index:50;
    backdrop-filter:blur(16px);
    background:rgba(7,16,22,.76);
    border-bottom:1px solid var(--line);
  }
  .nav-inner{max-width:var(--max);margin:auto;padding:13px 24px;display:flex;align-items:center;gap:18px}
  .brand{font-weight:800;letter-spacing:.04em;white-space:nowrap}
  .brand span{color:var(--gold)}
  .navlinks{display:flex;gap:16px;overflow:auto;font-size:14px;color:var(--muted);scrollbar-width:none}
  .navlinks::-webkit-scrollbar{display:none}
  .navlinks a{color:var(--muted);white-space:nowrap}
  .navlinks a:hover{color:var(--text);text-decoration:none}
  .hero{max-width:var(--max);margin:auto;padding:86px 24px 46px}
  .eyebrow{display:inline-flex;gap:8px;align-items:center;color:var(--cyan);font-size:13px;font-weight:800;letter-spacing:.12em;text-transform:uppercase}
  .dot{width:7px;height:7px;border-radius:50%;background:var(--cyan);box-shadow:0 0 18px var(--cyan)}
  h1{font-size:clamp(42px,7vw,88px);line-height:.98;letter-spacing:-.055em;margin:22px 0 24px;max-width:1000px}
  h1 .soft{color:#9eb1bc}
  .lead{font-size:clamp(18px,2.2vw,24px);color:#c8d5dc;max-width:870px;margin:0 0 32px}
  .verdicts{display:flex;flex-wrap:wrap;gap:10px}
  .pill{border:1px solid var(--line);background:rgba(255,255,255,.035);padding:9px 13px;border-radius:999px;font-size:13px}
  .pill strong{color:var(--gold)}
  main{max-width:var(--max);margin:auto;padding:0 24px 90px}
  section{padding:64px 0;border-top:1px solid var(--line)}
  .section-kicker{font-size:12px;color:var(--cyan);font-weight:800;letter-spacing:.14em;text-transform:uppercase}
  h2{font-size:clamp(30px,4.5vw,52px);line-height:1.08;letter-spacing:-.035em;margin:10px 0 18px}
  h3{font-size:22px;letter-spacing:-.02em;margin:0 0 10px}
  p{margin:10px 0;color:#d2dde2}
  .muted{color:var(--muted)}
  .grid{display:grid;grid-template-columns:repeat(12,1fr);gap:18px}
  .card{
    background:linear-gradient(180deg,rgba(255,255,255,.045),rgba(255,255,255,.025));
    border:1px solid var(--line);border-radius:var(--radius);padding:24px;box-shadow:var(--shadow)
  }
  .card.flat{box-shadow:none}
  .span4{grid-column:span 4}.span5{grid-column:span 5}.span6{grid-column:span 6}.span7{grid-column:span 7}.span8{grid-column:span 8}.span12{grid-column:1/-1}
  .big-number{font-size:48px;font-weight:850;letter-spacing:-.05em;line-height:1;color:var(--gold);margin:6px 0}
  .label{font-size:12px;letter-spacing:.12em;text-transform:uppercase;color:var(--muted);font-weight:800}
  .quote{
    margin:28px 0;padding:24px 26px;border-left:3px solid var(--gold);
    background:linear-gradient(90deg,rgba(244,207,118,.09),transparent);
    border-radius:0 16px 16px 0;font-size:21px;color:#f2ead5
  }
  .equation{
    margin:20px 0;padding:22px;border-radius:18px;border:1px solid rgba(115,224,209,.25);
    background:rgba(115,224,209,.06);text-align:center;font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
    font-size:clamp(17px,2vw,23px);overflow:auto
  }
  .equation strong{color:var(--cyan)}
  .flow{display:flex;gap:10px;align-items:stretch;flex-wrap:wrap;margin-top:22px}
  .node{flex:1 1 170px;border:1px solid var(--line);border-radius:18px;padding:18px;background:rgba(255,255,255,.025)}
  .node .n{width:28px;height:28px;border-radius:50%;display:grid;place-items:center;background:var(--panel2);color:var(--gold);font-weight:800;margin-bottom:11px}
  .arrow{align-self:center;color:#607781;font-size:24px}
  table{width:100%;border-collapse:collapse;font-size:14px;margin-top:16px}
  th,td{padding:12px 12px;border-bottom:1px solid var(--line);text-align:right}
  th:first-child,td:first-child{text-align:left}
  th{color:#aabcc5;font-size:12px;text-transform:uppercase;letter-spacing:.06em}
  tr.highlight td{color:var(--gold);font-weight:800}
  .barrow{display:grid;grid-template-columns:130px 1fr 64px;gap:12px;align-items:center;margin:13px 0}
  .barbg{height:12px;background:rgba(255,255,255,.06);border-radius:99px;overflow:hidden}
  .bar{height:100%;border-radius:99px;background:linear-gradient(90deg,var(--cyan),#a3f0e5)}
  .bar.bad{background:linear-gradient(90deg,#ff9f9f,var(--red))}
  .bar.gold{background:linear-gradient(90deg,#e7b958,var(--gold))}
  .barlabel{font-size:13px;color:#c8d5da}
  .barvalue{text-align:right;font-variant-numeric:tabular-nums;font-weight:800}
  .callout{border:1px solid rgba(244,207,118,.23);background:rgba(244,207,118,.06);border-radius:18px;padding:20px 22px}
  .callout strong{color:var(--gold)}
  .compare{display:grid;grid-template-columns:1fr 1fr;gap:18px;margin-top:22px}
  .good{border-top:2px solid var(--green)} .warn{border-top:2px solid var(--red)}
  ul{padding-left:20px;color:#d2dde2}
  li{margin:7px 0}
  .matrix{display:grid;grid-template-columns:160px 1fr 1fr;border:1px solid var(--line);border-radius:18px;overflow:hidden;margin-top:20px}
  .matrix>div{padding:14px 16px;border-bottom:1px solid var(--line);border-right:1px solid var(--line)}
  .matrix>div:nth-child(3n){border-right:0}
  .matrix .head{background:rgba(255,255,255,.045);font-weight:800;color:#dbe6ea}
  .matrix .yes{color:var(--green)} .matrix .no{color:var(--red)}
  details{border:1px solid var(--line);border-radius:16px;padding:0 18px;background:rgba(255,255,255,.025);margin:12px 0}
  summary{cursor:pointer;padding:17px 0;font-weight:800;color:#e8f1f4}
  details>div{padding:0 0 18px}
  .formula-stack{display:grid;gap:10px;margin-top:18px}
  .formula-line{font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;background:#08141b;border:1px solid var(--line);border-radius:13px;padding:14px 16px;overflow:auto}
  .tag{display:inline-block;padding:5px 9px;border:1px solid var(--line);border-radius:999px;color:var(--muted);font-size:12px;margin:3px 4px 3px 0}
  .takeaway{
    font-size:clamp(28px,4vw,48px);line-height:1.14;letter-spacing:-.035em;
    padding:34px;border:1px solid rgba(115,224,209,.24);
    border-radius:28px;background:
      radial-gradient(500px 220px at 90% 0%,rgba(115,224,209,.10),transparent),
      rgba(115,224,209,.035)
  }
  .takeaway em{color:var(--cyan);font-style:normal}
  .refs{counter-reset:ref}
  .ref{display:grid;grid-template-columns:36px 1fr;gap:12px;padding:14px 0;border-bottom:1px solid var(--line)}
  .ref:before{counter-increment:ref;content:counter(ref);width:28px;height:28px;border-radius:50%;display:grid;place-items:center;background:var(--panel2);color:var(--muted);font-size:12px;font-weight:800}
  .ref-title{font-weight:800}
  .ref-meta{font-size:13px;color:var(--muted)}
  .footer{max-width:var(--max);margin:auto;padding:0 24px 50px;color:#7f949f;font-size:13px}
  .mini{font-size:12px;color:#8196a1}
  .sticky-note{display:flex;gap:12px;align-items:flex-start}
  .icon{width:34px;height:34px;border-radius:10px;background:rgba(115,224,209,.1);display:grid;place-items:center;flex:none}
  @media(max-width:820px){
    .span4,.span5,.span6,.span7,.span8{grid-column:1/-1}
    .compare{grid-template-columns:1fr}
    .matrix{grid-template-columns:1fr}
    .matrix>div{border-right:0}
    .matrix .head:nth-child(2),.matrix .head:nth-child(3){display:none}
    .barrow{grid-template-columns:100px 1fr 54px}
    .hero{padding-top:58px}
    h1{font-size:48px}
    .arrow{display:none}
  }
  @media print{
    .nav,.progress{display:none}
    body{background:#fff;color:#111}
    p,.muted,li,.ref-meta{color:#333}
    .card,.callout,.equation,details,.takeaway{box-shadow:none;background:#fff;border-color:#ccc}
    h1,h2,h3,.ref-title{color:#111}
    a{color:#0645ad}
  }

/* A restrained financial notebook within the shared Soren frame. */
body{min-width:320px}
a:focus-visible,summary:focus-visible{outline:2px solid var(--cyan);outline-offset:4px}
.sp-header{position:relative;z-index:2}
.sp-header .sp-brand,.sp-nav a{color:var(--text)}
.sp-footer{color:var(--muted)}
.nav{top:0}
.nav-inner{max-width:1100px}
.brand{font-family:"Iowan Old Style",Georgia,"Songti SC",serif;font-weight:600;letter-spacing:-.02em}
.hero{padding-top:clamp(48px,6vw,78px)}
h1{max-width:var(--max);font-size:clamp(42px,5.6vw,72px);line-height:1.07}
.back-link{display:inline-block;margin-bottom:24px;font-size:14px}
.note-context{max-width:790px;margin:26px 0 0;color:var(--muted);font-size:14px}
.ref-title a{overflow-wrap:anywhere}
@media(max-width:640px){
  .nav-inner{display:block;padding:10px 18px}
  .brand{display:none}
  .navlinks{gap:18px}
  .hero,main{padding-left:18px;padding-right:18px}
  h1{font-size:clamp(38px,11vw,48px);line-height:1.09}
  .card{padding:20px}
  .barrow{grid-template-columns:minmax(70px,95px) minmax(0,1fr) 48px;gap:7px}
  .matrix{display:block}
  table{display:block;overflow-x:auto;white-space:nowrap}
  th,td{min-width:110px}
  .footer{padding-left:18px;padding-right:18px}
}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}}