*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
:root{--accent:#4f46e5;--ink:#1a1a1a;--muted:#555;--line:#e5e5e5;--max:920px}
body{font-family:"Noto Sans SC",system-ui,sans-serif;background:#fff;color:var(--ink);line-height:1.82;font-size:16px}
img{max-width:100%;height:auto;display:block}figure{margin:1.25rem 0}figure img{max-width:min(100%,560px);height:auto;border-radius:8px;margin:0 auto}figure figcaption{font-size:.78rem;color:var(--muted);text-align:center;margin-top:.45rem}
a{color:var(--accent);text-decoration:none}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:1px solid var(--line)}
.header-row{display:flex;align-items:center;justify-content:space-between;min-height:64px}
.brand{display:flex;align-items:center;gap:.6rem;font-weight:600}.brand img{border-radius:8px}
.site-nav ul{display:flex;gap:1rem;list-style:none}.site-nav a{color:var(--muted)}.site-nav a.active,.site-nav a:hover{color:var(--accent)}
.nav-toggle{display:none;border:1px solid var(--line);width:42px;height:42px;border-radius:8px;cursor:pointer;flex-direction:column;justify-content:center;align-items:center;gap:5px;background:none;padding:6px}.nav-toggle span{width:22px;height:2px;background:var(--ink);display:block}
.ads-top-bar{border-bottom:1px solid var(--line);background:#fafafa;padding:.5rem 0}.applist-title{font-size:.78rem;color:var(--muted);text-align:center;margin-bottom:.35rem}#ads{display:flex;justify-content:center;flex-wrap:wrap;gap:.5rem}
.hero-wrap{padding:2rem 0;border-bottom:1px solid var(--line)}.hero-inner h1{font-size:clamp(1.5rem,3.5vw,2rem);margin-bottom:1rem;line-height:1.35}.lead{color:#333;font-size:1.05rem}
.ext-links{display:flex;flex-wrap:wrap;gap:.75rem;padding:1rem 0;border-bottom:1px solid var(--line)}.ext-links a{padding:.45rem .9rem;border:1px solid var(--line);border-radius:999px;font-size:.88rem;color:var(--ink);background:#fff}.ext-links a:hover{border-color:var(--accent);color:var(--accent);text-decoration:none}
.ribbon-block{padding:2.5rem 0}.ribbon-a{background:linear-gradient(135deg,#eef2ff,#fff)}.ribbon-b{background:linear-gradient(135deg,#ecfdf5,#fff)}.ribbon-c{background:linear-gradient(135deg,#fdf4ff,#fff)}
.ribbon-block h2{font-size:1.25rem;color:var(--accent);margin-bottom:1rem}.ribbon-block p{margin-bottom:1rem;text-align:justify}
.faq-block{padding:2rem 0}.faq-block details{border:1px solid var(--line);border-radius:10px;padding:1rem;margin-bottom:.75rem;background:#fafafa}.faq-block summary{cursor:pointer;font-weight:600}
.page-head{padding:2rem 0 1rem;border-bottom:1px solid var(--line)}.breadcrumb{font-size:.86rem;color:var(--muted);margin-bottom:.5rem}.prose-page{padding:2rem 0 3rem}.prose-page h2{color:var(--accent);margin:1.5rem 0 1rem}.prose-page p{margin-bottom:1rem;text-align:justify}
.related-read{margin:2rem 0 3rem;padding:1.5rem;border:1px solid var(--line);border-radius:10px;background:#fafafa}.related-grid{display:flex;flex-wrap:wrap;gap:.75rem}.related-grid a{padding:.4rem .85rem;border:1px solid var(--line);border-radius:6px;font-size:.88rem;color:var(--ink);background:#fff}.related-grid a:hover{border-color:var(--accent);color:var(--accent);text-decoration:none}
.site-footer{border-top:1px solid var(--line);padding:2rem 0;text-align:center;color:var(--muted);font-size:.88rem}.footer-links{display:flex;flex-wrap:wrap;justify-content:center;gap:1rem;margin-bottom:.75rem}.footer-links a{color:var(--muted)}
.error-page{min-height:60vh;display:flex;align-items:center;justify-content:center;text-align:center;padding:3rem 0}.error-page h1{font-size:4rem;color:var(--accent)}
@media(max-width:768px){.nav-toggle{display:flex}.site-nav{display:none;position:absolute;top:64px;left:0;right:0;background:#fff;border-bottom:1px solid var(--line);padding:1rem}.site-nav.is-open{display:block}.site-nav ul{flex-direction:column}}