:root{
  --blue:#1e50a2; --blue-deep:#133a7c; --ink:#1c2430; --paper:#fbfcfe;
  --line:#dbe4f0; --soft:#eef3fa;
}
*{box-sizing:border-box}
body{margin:0;font-family:Georgia,'Times New Roman',serif;color:var(--ink);background:var(--paper);line-height:1.65}
a{color:var(--blue)}
.site-hdr{position:sticky;top:0;background:#fff;border-bottom:1px solid var(--line);display:flex;align-items:center;justify-content:space-between;padding:.6rem 1.1rem;z-index:10}
.brand{display:flex;align-items:center;gap:.5rem;text-decoration:none;color:var(--ink)}
.brand-name{font-size:1.25rem;font-weight:700;letter-spacing:.01em}
.brand-name em{font-style:normal;color:var(--blue)}
.site-nav a{margin-left:1.1rem;text-decoration:none;color:var(--ink);font-size:.98rem}
.site-nav a:hover{color:var(--blue)}
main{max-width:880px;margin:0 auto;padding:0 1.1rem 3rem}
.hero{padding:3.2rem 0 2.2rem;text-align:left}
.hero h1{font-size:2.35rem;line-height:1.2;margin:0 0 1rem}
.lede{font-size:1.13rem;max-width:40rem}
.hero-cta{margin:1.6rem 0 .4rem}
.hero-note{color:#5a6a80;font-size:.92rem}
.btn{display:inline-block;background:var(--blue);color:#fff;text-decoration:none;padding:.72rem 1.35rem;border-radius:8px;font-size:1.02rem}
.btn:hover{background:var(--blue-deep)}
.btn-dark{background:var(--ink)}
.btn-dark:hover{background:#000}
.tool-card{background:var(--soft);border:1px solid var(--line);border-radius:14px;padding:1.8rem;margin:1.5rem 0 2.5rem}
.tool-card h2{margin-top:0;font-size:1.6rem}
.tool-slogan{font-style:italic;font-size:1.12rem;color:var(--blue-deep)}
.tool-list{padding-left:1.2rem}
.library h2,.about h2,.system h2{font-size:1.55rem;margin-bottom:.6rem}
.system{margin:.5rem 0 2.5rem}
.system p{max-width:44rem}
.system .sys-link{margin-top:1.1rem}
.system-fig{margin:1.6rem 0 .4rem;background:#fff;border:1px solid var(--line);border-radius:12px;padding:1rem 1rem .7rem}
.system-fig svg{width:100%;height:auto;display:block}
.system-fig svg text{font-family:Georgia,'Times New Roman',serif}
.system-fig figcaption{color:#44536a;font-size:.95rem;margin-top:.55rem;text-align:center}
.lib-grid{list-style:none;padding:0;display:grid;grid-template-columns:1fr 1fr;gap:1rem}
.lib-grid li{background:#fff;border:1px solid var(--line);border-radius:10px;padding:1rem 1.1rem}
.lib-grid strong{display:block;margin-bottom:.3rem}
.lib-grid span{color:#44536a;font-size:.96rem}
.about{margin-top:2.5rem}
.disclaimer{font-size:.9rem;color:#5a6a80;border-left:3px solid var(--line);padding-left:.9rem}
.site-ftr{border-top:1px solid var(--line);text-align:center;color:#5a6a80;font-size:.92rem;padding:1.6rem 1rem 2.2rem}
.site-ftr a{color:#5a6a80}
@media (max-width:640px){
  .hero h1{font-size:1.8rem}
  .lib-grid{grid-template-columns:1fr}
  .site-nav a{margin-left:.7rem;font-size:.9rem}
}

/* --- articles (2026-10-23 seed guides) --- */
.article{padding-top:1.6rem}
.article h1{font-size:2.1rem;line-height:1.22;margin:.4rem 0 .8rem}
.article h2{font-size:1.42rem;margin:2rem 0 .55rem}
.article p{max-width:44rem}
.crumbs{color:#5a6a80;font-size:.9rem}
.crumbs a{color:#5a6a80}
.pull{margin:1.7rem 0;padding:.4rem 0 .4rem 1.1rem;border-left:3px solid var(--blue);font-size:1.18rem;font-style:italic;color:var(--blue-deep);max-width:40rem}
.chart{border-collapse:collapse;width:100%;margin:1.1rem 0;font-size:.97rem;background:#fff}
.chart th,.chart td{border:1px solid var(--line);padding:.5rem .65rem;text-align:left;vertical-align:top}
.chart th{background:var(--soft)}
.chart .t-time{white-space:nowrap;font-weight:700}
.chart .han,.stage-list .han{color:#5a6a80}
.stage-list{max-width:44rem;padding-left:1.2rem}
.stage-list li{margin:.45rem 0}
.doctor-note{background:#fdf6e0;border:1px solid #e8d48a;border-radius:10px;padding:.9rem 1.1rem;font-size:.95rem;max-width:44rem;margin:1.6rem 0}
.faq{margin-top:2.2rem}
.faq-item{max-width:44rem;margin-bottom:1.1rem}
.faq-item h3{font-size:1.05rem;margin:0 0 .3rem}
.faq-item p{margin:0}
.seealso{margin-top:2.2rem}
.seealso a{display:block;text-decoration:none;color:inherit}
.tool-embed{margin:1.4rem 0}
.tool-embed iframe{width:100%;height:760px;border:1px solid var(--line);border-radius:12px;background:#fff}
.tool-embed-note{color:#5a6a80;font-size:.92rem}
@media (max-width:640px){.article h1{font-size:1.65rem}.tool-embed iframe{height:640px}}