*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
:root{--accent:#1e40af;--accent-light:#eff6ff;--ink:#111827;--muted:#6b7280;--line:#e5e7eb;--pillar:#dbeafe;--max:1140px}
body{font-family:"Noto Sans SC",system-ui,sans-serif;background:#fff;color:var(--ink);line-height:1.85;font-size:16px}
img{max-width:100%;height:auto;display:block}
a{color:var(--accent)}a:hover{text-decoration:underline}
.container{width:min(100% - 2rem,var(--max));margin-inline:auto}
.site-header{position:sticky;top:0;z-index:100;background:#fff;border-bottom:2px solid var(--accent)}
.header-row{display:flex;align-items:center;justify-content:space-between;min-height:60px}
.brand{display:flex;align-items:center;gap:.55rem;font-weight:600;color:var(--ink);text-decoration:none}
.brand:hover{text-decoration:none;color:var(--accent)}
.site-nav ul{display:flex;gap:1rem;list-style:none}.site-nav a{color:var(--muted);font-size:.92rem;text-decoration:none}
.site-nav a.active,.site-nav a:hover{color:var(--accent)}
.nav-toggle{display:none;border:1px solid var(--line);width:40px;height:40px;border-radius:8px;cursor:pointer;flex-direction:column;justify-content:center;align-items:center;gap:5px;background:#fff}
.nav-toggle span{width:20px;height:2px;background:var(--ink);display:block;transition:transform .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)}
.ads-top-bar{border-bottom:1px solid var(--line);padding:.45rem 0;background:var(--accent-light)}
.applist-title{font-size:.75rem;color:var(--muted);text-align:center}
#ads{display:flex;justify-content:center;flex-wrap:wrap;gap:.4rem}
.hero{padding:2.2rem 0 1.6rem;border-bottom:1px solid var(--line)}
.hero h1{font-size:clamp(1.35rem,3vw,1.9rem);line-height:1.35;margin-bottom:.9rem;color:var(--accent)}
.hero .lead{color:#374151;text-align:justify;margin-bottom:.75rem}
.link-strip{display:flex;flex-wrap:wrap;gap:.6rem;padding:1rem 0 0}
.link-strip a{padding:.38rem .85rem;border:1px solid var(--pillar);border-radius:6px;font-size:.88rem;color:var(--accent);background:var(--accent-light);text-decoration:none}
.link-strip a:hover{border-color:var(--accent);background:#fff}
.pillar-wrap{padding:2rem 0 2.5rem}
.pillar-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:0;align-items:stretch}
.pillar-col{padding:1.5rem 1.35rem;border-left:3px solid var(--accent);background:linear-gradient(180deg,var(--accent-light) 0%,#fff 18%)}
.pillar-col:first-child{border-left:none;border-right:1px solid var(--pillar)}
.pillar-col:nth-child(2){border-right:1px solid var(--pillar)}
.pillar-col h2{font-size:1.05rem;color:var(--accent);margin-bottom:.85rem;padding-bottom:.5rem;border-bottom:2px solid var(--pillar)}
.pillar-col p{margin-bottom:.85rem;text-align:justify;color:#333;font-size:.95rem}
.pillar-col figure{margin:1rem 0;border-radius:10px;overflow:hidden;border:1px solid var(--line);box-shadow:0 6px 20px rgba(30,64,175,.08)}
.pillar-col figcaption{font-size:.74rem;color:var(--muted);padding:.4rem;text-align:center;background:#f9fafb}
.note-box{background:var(--accent-light);border-left:4px solid var(--accent);padding:.85rem 1rem;border-radius:0 8px 8px 0;margin:1rem 0;font-size:.93rem}
.pillar-span{grid-column:1/-1;padding:1.5rem 0 0;margin-top:1rem;border-top:2px dashed var(--pillar)}
.pillar-span h2{font-size:1.08rem;color:var(--accent);margin-bottom:.75rem}
.pillar-span p{margin-bottom:.8rem;text-align:justify;color:#333}
.faq-block{padding:1.5rem 0}
.faq-block details{border:1px solid var(--line);border-radius:10px;padding:.9rem;margin-bottom:.6rem;background:#fff}
.faq-block summary{cursor:pointer;font-weight:600;color:var(--accent)}
.related-read{margin:2rem 0;padding:1.2rem;border:1px solid var(--line);border-radius:10px;background:var(--accent-light)}
.related-read h2{font-size:1rem;color:var(--accent);margin-bottom:.75rem}
.related-grid{display:flex;flex-wrap:wrap;gap:.55rem}
.related-grid a{padding:.38rem .78rem;border:1px solid var(--line);border-radius:8px;font-size:.86rem;color:var(--ink);text-decoration:none;background:#fff}
.related-grid a:hover{border-color:var(--accent);color:var(--accent)}
.page-head{padding:2rem 0 1rem;border-bottom:1px solid var(--line)}
.breadcrumb{font-size:.84rem;color:var(--muted);margin-bottom:.4rem}
.prose-page{padding:2rem 0 3rem}.prose-page h2{color:var(--accent);margin:1.3rem 0 .75rem;font-size:1.08rem}
.prose-page p{margin-bottom:.88rem;text-align:justify;color:#333}
.site-footer{border-top:2px solid var(--accent);padding:1.5rem 0;text-align:center;color:var(--muted);font-size:.86rem;background:var(--accent-light)}
.footer-links{display:flex;justify-content:center;gap:1rem;margin-bottom:.45rem;flex-wrap:wrap}
.footer-links a{color:var(--muted);text-decoration:none}.footer-links a:hover{color:var(--accent)}
.error-page{min-height:50vh;display:flex;align-items:center;justify-content:center;text-align:center;padding:2rem}
.error-page h1{font-size:3.2rem;color:var(--accent)}
@media(max-width:900px){
  .pillar-grid{grid-template-columns:1fr}
  .pillar-col{border-left:3px solid var(--accent);border-right:none!important;margin-bottom:1rem;border-radius:0 8px 8px 0}
  .pillar-col:first-child{border-left:3px solid var(--accent)}
}
@media(max-width:768px){
  .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}.nav-toggle{display:flex}
}