*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
:root{--accent:#e11d48;--accent-soft:#ffe4e6;--ink:#1c1917;--muted:#57534e;--line:#e7e5e4;--bg:#fff;--max:920px;--radius:12px}
html{scroll-behavior:smooth;scroll-padding-top:72px}
body{font-family:"Noto Sans SC",system-ui,sans-serif;background:var(--bg);color:var(--ink);line-height:1.82;font-size:16px}
img{max-width:100%;height:auto;display:block}
a{color:var(--accent);text-decoration:none}
a:hover{text-decoration:underline}
.container{max-width:var(--max);margin:0 auto;padding:0 1.25rem}
.site-header{border-bottom:1px solid var(--line);background:#fff;position:sticky;top:0;z-index:100}
.header-row{display:flex;align-items:center;justify-content:space-between;min-height:58px;gap:1rem;position:relative}
.brand{display:flex;align-items:center;gap:.6rem;color:var(--ink);font-size:.95rem;font-weight:600;text-decoration:none}
.nav-toggle{display:none;flex-direction:column;gap:5px;background:none;border:1px solid var(--line);border-radius:8px;cursor:pointer;padding:8px;width:40px;height:40px;justify-content:center;align-items:center}
.nav-toggle span{display:block;width:20px;height:2px;background:var(--ink)}
.site-nav ul{display:flex;gap:1.25rem;list-style:none;flex-wrap:wrap}
.site-nav a{color:var(--muted);font-size:.9rem;text-decoration:none}
.site-nav a.active,.site-nav a:hover{color:var(--accent)}
.ads-top-bar{background:#fafafa;border-bottom:1px solid var(--line);padding:.5rem 0}
.applist-title{font-size:.8rem;color:var(--muted);margin-bottom:.35rem;text-align:center}
#ads{display:flex;justify-content:center;flex-wrap:wrap;gap:.5rem}
.hero{padding:2rem 0 1rem;border-bottom:1px solid var(--line)}
.hero h1{font-size:clamp(1.35rem,3vw,1.85rem);line-height:1.35;margin-bottom:1rem}
.lead{color:#44403c;font-size:1.02rem;margin-bottom:.75rem;text-align:justify}
.lead strong{color:var(--ink)}
.link-strip{display:flex;flex-wrap:wrap;gap:.75rem;padding:1.25rem 0;border-bottom:1px solid var(--line)}
.link-strip a{padding:.4rem .9rem;border:1px solid var(--line);border-radius:999px;font-size:.85rem;color:var(--ink);background:var(--accent-soft)}
.link-strip a:hover{border-color:var(--accent);color:var(--accent);text-decoration:none}
.timeline-wrap{padding:2.5rem 0 3rem}
.timeline-right{position:relative;padding-right:2.5rem}
.timeline-right::before{content:"";position:absolute;right:.85rem;top:.5rem;bottom:.5rem;width:3px;background:linear-gradient(180deg,var(--accent),var(--accent-soft));border-radius:3px}
.tl-item{position:relative;margin-bottom:2.25rem;padding:1.5rem 1.75rem;background:#fff;border:1px solid var(--line);border-radius:var(--radius);box-shadow:0 4px 20px rgba(225,29,72,.06)}
.tl-item::before{content:attr(data-step);position:absolute;right:-2.5rem;top:1.35rem;width:2rem;height:2rem;border-radius:50%;background:var(--accent);color:#fff;font-size:.82rem;font-weight:700;display:flex;align-items:center;justify-content:center;transform:translateX(50%);margin-right:.85rem;box-shadow:0 0 0 4px #fff}
.tl-item h2{font-size:1.12rem;color:var(--accent);margin-bottom:.75rem;line-height:1.4}
.tl-item p{margin-bottom:.85rem;text-align:justify;color:#333;font-size:.96rem}
.tl-item p:last-child{margin-bottom:0}
.content-fig img{width:100%;max-width:560px;margin:1rem auto;border-radius:8px;border:1px solid var(--line)}
.content-fig figcaption{font-size:.78rem;color:var(--muted);margin-top:.45rem;text-align:center}
.faq{margin:2rem 0;padding-top:1.5rem;border-top:1px solid var(--line)}
.faq h2{font-size:1.2rem;margin-bottom:1rem;color:var(--accent)}
.faq details{border:1px solid var(--line);border-radius:var(--radius);margin-bottom:.5rem;background:#fafaf9}
.faq summary{cursor:pointer;padding:.75rem 1rem;font-weight:600;list-style:none}
.faq summary::-webkit-details-marker{display:none}
.faq details[open] summary{border-bottom:1px solid var(--line)}
.faq details p{padding:.75rem 1rem;font-size:.92rem;color:var(--muted)}
.related-read{padding:2rem 0 3rem;border-top:1px solid var(--line)}
.related-read h2{font-size:1rem;margin-bottom:1rem}
.related-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(140px,1fr));gap:.75rem}
.related-grid a{display:block;padding:.65rem;border:1px solid var(--line);border-radius:6px;text-align:center;font-size:.88rem;color:var(--ink);text-decoration:none;background:#fff}
.related-grid a:hover{border-color:var(--accent);color:var(--accent)}
.site-footer{border-top:1px solid var(--line);padding:1.5rem 0 2rem;background:#fafaf9}
.footer-links{display:flex;flex-wrap:wrap;gap:1rem;margin-bottom:.75rem;justify-content:center}
.footer-links a{font-size:.85rem;color:var(--muted);text-decoration:none}
.site-footer p{font-size:.8rem;color:var(--muted);text-align:center}
.page-head{padding:2rem 0 1rem;border-bottom:1px solid var(--line)}
.page-head h1{font-size:1.6rem}
.breadcrumb{font-size:.85rem;color:var(--muted);margin-bottom:.75rem}
.breadcrumb a{color:var(--muted)}
.prose-page{padding:2rem 0 3rem;max-width:720px}
.prose-page h2{font-size:1.15rem;margin:1.5rem 0 .75rem;color:var(--accent)}
.prose-page p{margin-bottom:1rem;text-align:justify;color:#333}
.error-page{min-height:55vh;display:flex;align-items:center;justify-content:center;text-align:center;padding:2rem}
.error-page h1{font-size:3rem;color:var(--accent)}
@media(max-width:768px){
  .nav-toggle{display:flex}
  .site-nav{position:absolute;top:100%;left:0;right:0;background:#fff;border-bottom:1px solid var(--line);padding:1rem;display:none}
  .site-nav.is-open{display:block}
  .site-nav ul{flex-direction:column;gap:.75rem}
  .timeline-right{padding-right:2rem}
  .tl-item::before{right:-2rem;margin-right:.7rem;width:1.65rem;height:1.65rem;font-size:.75rem}
  .timeline-right::before{right:.7rem}
}