*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
:root{
  --ink:#0f172a;--body:#334155;--muted:#64748b;--line:#e2e8f0;
  --teal:#0f766e;--teal-soft:#ccfbf1;--rose:#be123c;--rose-soft:#fff1f2;
  --sand:#fffbeb;--header-h:58px;--rail:920px;
}
html{scroll-behavior:smooth}
body{font-family:"Noto Sans SC",system-ui,sans-serif;color:var(--body);background:#fff;line-height:1.82;font-size:16px}
img{max-width:100%;height:auto;display:block}
a{color:var(--teal);text-decoration:none}
a:hover{text-decoration:underline}

.site-header{position:sticky;top:0;z-index:400;background:rgba(255,255,255,.97);backdrop-filter:blur(10px);border-bottom:1px solid var(--line);box-shadow:0 1px 0 var(--teal-soft)}
.header-inner{max-width:1080px;margin:0 auto;padding:0 1.15rem;display:flex;align-items:center;justify-content:space-between;min-height:var(--header-h)}
.brand{display:flex;align-items:center;gap:.75rem;color:var(--ink);font-size:.88rem;text-decoration:none}
.brand:hover{text-decoration:none}
.brand em{font-style:normal;font-weight:700;color:var(--teal)}
.brand span{line-height:1.35;max-width:340px}

.nav-toggle{display:none;background:none;border:none;cursor:pointer;padding:.5rem;flex-direction:column;gap:5px}
.nav-toggle span{display:block;width:22px;height:2px;background:var(--ink);transition:transform .2s,opacity .2s}
.nav-toggle.is-open span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.nav-toggle.is-open span:nth-child(2){opacity:0}
.nav-toggle.is-open span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}

.site-nav ul{display:flex;gap:1rem;list-style:none}
.site-nav a{color:var(--muted);font-size:.86rem;text-decoration:none;padding:.25rem 0;border-bottom:2px solid transparent}
.site-nav a:hover,.site-nav a.active{color:var(--teal);border-bottom-color:var(--rose);font-weight:600}

.ads-top-bar{background:var(--teal-soft);border-bottom:1px solid var(--line);padding:.55rem 0}
#applist{display:flex;align-items:center;gap:1rem;flex-wrap:wrap}
.applist-title{font-size:.76rem;color:var(--muted);white-space:nowrap}
#ads{display:flex;gap:.75rem;flex-wrap:wrap}
.ads-item figure{margin:0;text-align:center}
.ads-item img{border-radius:10px}
.ads-item .caption{font-size:.66rem;color:var(--muted);margin-top:.2rem;max-width:68px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}

.split-band{
  background:linear-gradient(135deg,var(--teal-soft) 0%,#fff 38%,var(--rose-soft) 100%);
  border-bottom:1px solid var(--line);
  padding:2.4rem 1.15rem 2rem;
}
.dual-pane{
  max-width:1080px;margin:0 auto;
  display:grid;grid-template-columns:minmax(0,.92fr) minmax(0,1.08fr);
  gap:2.2rem;align-items:center;
}
.dual-pane__media{
  position:relative;border-radius:20px;overflow:hidden;
  border:2px solid #fff;box-shadow:0 18px 48px rgba(15,118,110,.14);
  transform:rotate(-1.2deg);
}
.dual-pane__media img{width:100%;aspect-ratio:4/3;object-fit:cover}
.media-chip{
  position:absolute;left:1rem;bottom:1rem;
  background:rgba(15,23,42,.82);color:#fff;font-size:.72rem;font-weight:600;
  padding:.35rem .75rem;border-radius:999px;letter-spacing:.03em;
}
.dual-pane__copy{padding:.5rem 0}
.eyebrow{
  display:inline-block;font-size:.74rem;font-weight:700;color:var(--rose);
  background:#fff;border:1px solid #fecdd3;padding:.22rem .72rem;border-radius:6px;margin-bottom:.85rem;
}
.dual-pane__copy h1{font-size:clamp(1.38rem,2.8vw,1.72rem);line-height:1.34;color:var(--ink);font-weight:700;margin-bottom:.9rem}
.dual-pane__copy .lede{font-size:.98rem;color:var(--body);margin-bottom:.72rem;text-align:justify}
.jump-strip{display:flex;flex-wrap:wrap;gap:.45rem;margin-top:1.15rem}
.jump-strip a{
  font-size:.78rem;color:var(--teal);background:#fff;border:1px solid var(--line);
  padding:.32rem .72rem;border-radius:999px;text-decoration:none;transition:background .15s,border-color .15s;
}
.jump-strip a:hover,.jump-strip a.is-on{background:var(--teal);color:#fff;border-color:var(--teal);text-decoration:none}

.body-stack{max-width:var(--rail);margin:0 auto;padding:2.2rem 1.15rem 3.5rem}
.seg-block{margin-bottom:2.35rem;padding-bottom:.5rem}
.seg-block h2{
  font-size:1.12rem;color:var(--teal);font-weight:700;margin-bottom:.85rem;
  padding-left:.85rem;border-left:4px solid var(--rose);
}
.seg-block p{margin-bottom:.95rem;text-align:justify;color:#374151}
.seg-block ul,.seg-block ol{margin:.65rem 0 1rem 1.2rem;color:#374151}
.seg-block li{margin-bottom:.42rem}
.seg-block figure{
  margin:1.2rem 0;border-radius:14px;overflow:hidden;
  border:1px solid var(--line);box-shadow:0 4px 20px rgba(15,23,42,.06);
}
.seg-block figcaption{font-size:.8rem;color:var(--muted);padding:.55rem .85rem;background:var(--sand);text-align:center}
.callout-ribbon{
  background:var(--rose-soft);border-left:4px solid var(--rose);
  padding:.85rem 1rem;border-radius:0 10px 10px 0;font-size:.91rem;margin:1.05rem 0;color:#9f1239;
}
.compare-table{width:100%;border-collapse:collapse;font-size:.88rem;margin:1rem 0}
.compare-table th,.compare-table td{border:1px solid var(--line);padding:.65rem .75rem;text-align:left}
.compare-table th{background:var(--teal-soft);color:var(--ink);font-weight:600}
.compare-table tr:nth-child(even) td{background:#fafafa}

.qa-panel{background:#f8fafc;border:1px solid var(--line);border-radius:14px;padding:1.35rem 1.25rem;margin-top:1rem}
.qa-panel h3{font-size:.95rem;color:var(--ink);margin-bottom:.85rem}
.qa-panel dl{margin:0}
.qa-panel dt{font-weight:600;color:var(--teal);margin-top:.85rem;font-size:.93rem}
.qa-panel dt:first-child{margin-top:0}
.qa-panel dd{margin:.35rem 0 0 0;color:#475569;font-size:.9rem;line-height:1.75}
.end-note{
  margin-top:2rem;padding:1.35rem 1.2rem;background:linear-gradient(120deg,var(--teal-soft),#fff);
  border:1px dashed #99f6e4;border-radius:12px;
}
.end-note h3{font-size:1rem;color:var(--ink);margin-bottom:.65rem}
.end-note p{font-size:.92rem;margin-bottom:.6rem}
.read-more{display:flex;flex-wrap:wrap;gap:.55rem;margin-top:1.5rem;padding-top:1.35rem;border-top:1px dashed var(--line)}
.read-more a{font-size:.84rem;color:var(--muted);background:#fff;padding:.32rem .8rem;border-radius:6px;border:1px solid var(--line)}
.read-more a:hover{color:var(--teal);border-color:#5eead4;text-decoration:none}

.prose-page{max-width:var(--rail);margin:0 auto;padding:2rem 1.15rem 3rem}
.prose-page h1{font-size:1.45rem;margin-bottom:1rem;color:var(--teal)}
.prose-page p{margin-bottom:.95rem}

.error-page{max-width:var(--rail);margin:4rem auto;padding:2rem 1.15rem;text-align:center}
.error-page h1{font-size:3rem;color:var(--teal);margin-bottom:.5rem}

.site-footer{background:#f8fafc;border-top:1px solid var(--line);padding:1.55rem 1rem;text-align:center;font-size:.82rem;color:var(--muted)}
.footer-links{display:flex;flex-wrap:wrap;justify-content:center;gap:.45rem 1rem;margin-bottom:.6rem}
.footer-links a{color:var(--muted)}
.footer-sub{font-size:.75rem;margin-top:.35rem;color:#94a3b8}

@media(max-width:820px){
  .dual-pane{grid-template-columns:1fr;gap:1.5rem}
  .dual-pane__media{transform:none;order:2}
  .dual-pane__copy{order:1}
}
@media(max-width:640px){
  .nav-toggle{display:flex}
  .site-nav{position:absolute;top:100%;left:0;right:0;background:#fff;border-bottom:1px solid var(--line);padding:.75rem 1rem;display:none;box-shadow:0 6px 18px rgba(0,0,0,.07)}
  .site-nav.is-open{display:block}
  .site-nav ul{flex-direction:column;gap:0}
  .site-nav li{border-bottom:1px solid var(--line)}
  .site-nav a{display:block;padding:.65rem 0;border-bottom:none}
  .split-band{padding:1.65rem 1rem 1.4rem}
  .compare-table{font-size:.8rem}
  .compare-table th,.compare-table td{padding:.45rem .5rem}
}