*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
:root{--bg:#fff;--ink:#1a1a1a;--muted:#555;--line:#e5e5e5;--accent:#d97706;--accent-soft:#fef3c7;--accent-dark:#b45309;--max:880px;--radius:10px}
html{scroll-behavior:smooth;scroll-padding-top:11rem}
body{font-family:"Noto Sans SC",system-ui,sans-serif;background:var(--bg);color:var(--ink);line-height:1.82;font-size:16px;min-height:100vh}
img{max-width:100%;height:auto;display:block}
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:200;background:#fff;border-bottom:1px solid var(--line);box-shadow:0 1px 0 rgba(0,0,0,.04)}
.header-row{display:flex;align-items:center;justify-content:space-between;min-height:64px}
.brand{display:flex;align-items:center;gap:.65rem;font-weight:600;color:var(--ink);font-size:1rem}
.brand img{border-radius:8px;border:1px solid var(--line)}
.brand b{color:var(--accent);font-weight:700}
.site-nav ul{display:flex;gap:1.1rem;list-style:none}
.site-nav a{color:var(--muted);font-size:.95rem}
.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:10px;cursor:pointer;flex-direction:column;justify-content:center;align-items:center;gap:5px;background:#fff;padding:6px}
.nav-toggle span{width:22px;height:2px;background:var(--ink);display:block;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)}
.ads-top-bar{border-bottom:1px solid var(--line);background:#fff;padding:.55rem 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}
.ads-item figure{margin:0;text-align:center}
.ads-item img{width:65px;height:65px;border-radius:10px;object-fit:cover;border:1px solid var(--line)}
.ads-item .caption{font-size:11px;color:var(--muted);max-width:76px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.step-progress-wrap{position:sticky;top:64px;z-index:150;background:#fff;border-bottom:1px solid var(--line);padding:.85rem 0;box-shadow:0 2px 8px rgba(217,119,6,.06)}
.step-progress{position:relative;padding:0 1rem}
.step-track{display:flex;justify-content:space-between;list-style:none;position:relative;z-index:2;gap:.25rem}
.step-track::before{content:"";position:absolute;top:1.15rem;left:8%;right:8%;height:3px;background:var(--line);border-radius:3px;z-index:0}
.step-fill{position:absolute;top:1.15rem;left:8%;height:3px;background:linear-gradient(90deg,var(--accent),var(--accent-dark));border-radius:3px;z-index:1;width:0;transition:width .35s ease}
.step-node{flex:1;display:flex;flex-direction:column;align-items:center;gap:.35rem;position:relative;z-index:2}
.step-node a{display:flex;flex-direction:column;align-items:center;gap:.35rem;color:var(--muted);text-decoration:none}
.step-node a:hover{text-decoration:none;color:var(--accent)}
.step-num{width:2.3rem;height:2.3rem;border-radius:50%;background:#fff;border:2px solid var(--line);color:var(--muted);font-size:.88rem;font-weight:700;display:flex;align-items:center;justify-content:center;transition:all .25s ease}
.step-node.is-active .step-num,.step-node.is-done .step-num{background:var(--accent);border-color:var(--accent);color:#fff;box-shadow:0 0 0 4px var(--accent-soft)}
.step-node.is-done .step-num{background:var(--accent-dark);border-color:var(--accent-dark)}
.step-label{font-size:.68rem;text-align:center;line-height:1.2;max-width:4.5rem;color:var(--muted)}
.step-node.is-active .step-label{color:var(--accent);font-weight:600}
.hero{padding:2rem 0 1.25rem;border-bottom:1px solid var(--line)}
.hero h1{font-size:clamp(1.35rem,3vw,1.85rem);line-height:1.35;margin-bottom:1rem;color:var(--ink)}
.hero .lead{color:#333;margin-bottom:.85rem;text-align:justify;font-size:1.02rem}
.hero .lead strong{color:var(--ink);font-weight:600}
.link-strip{display:flex;flex-wrap:wrap;gap:.65rem;padding:.75rem 0 .25rem}
.link-strip a{padding:.45rem .95rem;border:1px solid var(--line);border-radius:999px;font-size:.88rem;color:var(--accent);background:var(--accent-soft)}
.link-strip a:hover{border-color:var(--accent);text-decoration:none}
.step-section{padding:2rem 0;border-top:1px solid var(--line);scroll-margin-top:11rem}
.step-section:last-of-type{border-bottom:1px solid var(--line)}
.step-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:1.5rem 1.75rem;border-left:4px solid var(--accent)}
.step-card h2{font-size:1.15rem;color:var(--accent);margin-bottom:1rem;font-weight:700;display:flex;align-items:center;gap:.5rem}
.step-card h2 .badge{display:inline-flex;align-items:center;justify-content:center;width:1.75rem;height:1.75rem;border-radius:50%;background:var(--accent);color:#fff;font-size:.82rem;font-weight:700;flex-shrink:0}
.step-card p{margin:0 0 1rem;color:#333;text-align:justify}
.step-card p:last-child{margin-bottom:0}
.step-card figure{margin:1.25rem 0}
.step-card figure img{max-width:min(100%,560px);border-radius:10px;margin:0 auto;border:1px solid var(--line)}
.step-card figcaption{font-size:.78rem;color:var(--muted);text-align:center;margin-top:.45rem}
.callout{background:var(--accent-soft);border-left:4px solid var(--accent);padding:1rem 1.15rem;border-radius:0 var(--radius) var(--radius) 0;margin:1rem 0;font-size:.95rem}
.faq-block{padding:2rem 0 2.5rem}
.faq-block h2{font-size:1.2rem;margin-bottom:1rem;color:var(--ink)}
.faq-block details{border:1px solid var(--line);border-radius:var(--radius);padding:1rem;margin-bottom:.75rem;background:#fafafa}
.faq-block summary{cursor:pointer;font-weight:600;color:var(--ink)}
.faq-block p{margin-top:.65rem;color:#444;font-size:.95rem}
.related-read{margin:2rem 0 3rem;padding:1.5rem;border:1px solid var(--line);border-radius:var(--radius);background:#fafafa}
.related-read h2{font-size:1.05rem;margin-bottom:.75rem}
.related-grid{display:flex;flex-wrap:wrap;gap:.65rem}
.related-grid a{padding:.45rem .85rem;border:1px solid var(--line);border-radius:8px;font-size:.88rem;color:var(--ink);background:#fff}
.related-grid a:hover{border-color:var(--accent);color:var(--accent);text-decoration:none}
.page-head{padding:2rem 0 1rem;border-bottom:1px solid var(--line)}
.page-head h1{font-size:1.65rem;margin:.5rem 0 0}
.breadcrumb{font-size:.82rem;color:var(--muted)}
.breadcrumb a{color:var(--accent)}
.prose-page{padding:2rem 0 3rem}
.prose-page h2{color:var(--accent);margin:1.75rem 0 1rem;font-size:1.15rem}
.prose-page p,.prose-page li{margin-bottom:1rem;text-align:justify;color:#333}
.prose-page ul{padding-left:1.25rem}
.site-footer{border-top:1px solid var(--line);padding:2rem 0;text-align:center;color:var(--muted);font-size:.88rem;background:#fff}
.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 1rem}
.error-page .code{font-size:4rem;font-weight:700;color:var(--accent);margin:0;line-height:1}
.error-page h1{margin:.75rem 0 1rem;font-size:1.3rem}
.error-page p{color:var(--muted)}
@media(max-width:768px){
  html{scroll-padding-top:13rem}
  .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 1.25rem;box-shadow:0 8px 24px rgba(0,0,0,.06)}
  .site-nav.is-open{display:block}
  .site-nav ul{flex-direction:column;gap:.75rem}
  .step-progress-wrap{top:64px;padding:.65rem 0}
  .step-label{font-size:.62rem;max-width:3.2rem}
  .step-num{width:2rem;height:2rem;font-size:.78rem}
  .step-track::before,.step-fill{top:1rem;left:5%;right:5%}
  .step-fill{top:1rem}
  .step-section{scroll-margin-top:13rem}
}