:root { --accent:#c2410c; --accent2:#b45309; --bg:#fef3e7; --card:#fff; --ink:#1c1917; --muted:#78716c; --max:1100px; --header-h:64px; }
*,*::before,*::after{box-sizing:border-box} html{scroll-behavior:smooth;scroll-padding-top:calc(var(--header-h)+16px)} body{margin:0;font-family:"Noto Sans SC",sans-serif;line-height:1.82;color:var(--ink);background:var(--bg);min-height:100vh} img{max-width:100%;height:auto;display:block} a{color:var(--accent);font-weight:500;text-decoration:none} a:hover{color:var(--accent2);text-decoration:underline} .container{width:min(100% - 2rem,var(--max));margin-inline:auto}
.site-header{position:sticky;top:0;z-index:500;background:var(--card);border-bottom:3px solid var(--accent);box-shadow:0 4px 20px rgba(194,65,12,.1)} .header-row{display:flex;align-items:center;justify-content:space-between;min-height:var(--header-h);gap:1rem} .brand{display:flex;align-items:center;gap:.65rem;color:var(--ink);font-weight:700;text-decoration:none} .brand b{color:var(--accent)} .brand img{border-radius:8px} .site-nav ul{display:flex;gap:.25rem;list-style:none;margin:0;padding:0;flex-wrap:wrap} .site-nav a{padding:.45rem .85rem;border-radius:6px;color:var(--muted);font-size:.92rem} .site-nav a.active,.site-nav a:hover{background:rgba(194,65,12,.1);color:var(--accent);text-decoration:none} .nav-toggle{display:none;background:none;border:none;cursor:pointer;padding:.5rem} .nav-toggle span{display:block;width:22px;height:2px;background:var(--ink);margin:5px 0}
.ads-top-bar{background:linear-gradient(180deg,#fff7ed,#fff);border-bottom:1px solid #fed7aa;padding:.75rem 0} #ads{display:flex;flex-wrap:wrap;gap:.75rem;justify-content:center} .ads-item figure{margin:0;text-align:center} .ads-item img{border-radius:10px} .applist-title{text-align:center;font-weight:700;color:var(--accent);margin-bottom:.5rem;font-size:.9rem}
.link-strip{display:flex;flex-wrap:wrap;justify-content:center;gap:.75rem;padding:1rem 0} .link-strip a{padding:.5rem 1rem;background:var(--card);border:2px solid var(--accent);border-radius:8px;color:var(--accent);font-size:.88rem} .link-strip a:hover{background:var(--accent);color:#fff;text-decoration:none}
.hero-pyramid{padding:2.5rem 0 1rem;background:linear-gradient(180deg,rgba(194,65,12,.08),transparent)} .pyramid-hero-grid{display:grid;grid-template-columns:1fr 1fr;gap:2rem;align-items:center} .hero-badge{display:inline-block;background:var(--accent);color:#fff;padding:.25rem .75rem;border-radius:4px;font-size:.78rem;font-weight:600;margin-bottom:.75rem} h1{font-size:clamp(1.5rem,3vw,2rem);line-height:1.35;margin:0 0 1rem} .lead{color:var(--muted);margin:0} .hero-visual img{border-radius:12px;box-shadow:0 12px 40px rgba(0,0,0,.15)}
.pyramid-stack{padding:2rem 0 3rem;display:flex;flex-direction:column;align-items:center;gap:0} .pyramid-tier{width:var(--tier-width);max-width:100%;margin:0 auto;background:var(--card);border:3px solid var(--accent);border-radius:12px 12px 0 0;box-shadow:0 -4px 0 var(--accent2),0 8px 24px rgba(0,0,0,.08);margin-bottom:-2px;transition:transform .2s} .pyramid-tier:hover{transform:translateY(-2px)} .tier-1{z-index:7} .tier-2{z-index:6} .tier-3{z-index:5} .tier-4{z-index:4} .tier-5{z-index:3} .tier-6{z-index:2} .tier-7{z-index:1}
.pyramid-head{width:100%;display:flex;align-items:center;gap:.75rem;padding:1rem 1.25rem;background:linear-gradient(135deg,var(--accent),var(--accent2));color:#fff;border:none;cursor:pointer;text-align:left;border-radius:9px 9px 0 0} .pyramid-head h2{margin:0;font-size:1rem;flex:1} .tier-num{background:rgba(255,255,255,.25);padding:.2rem .5rem;border-radius:4px;font-size:.75rem;font-weight:700} .tier-chevron{font-size:.7rem;transition:transform .2s} .pyramid-tier:not(.is-open) .tier-chevron{transform:rotate(-90deg)} .pyramid-tier:not(.is-open) .pyramid-body{display:none} .pyramid-inner{padding:1.25rem;display:grid;grid-template-columns:1fr auto;gap:1rem;align-items:start} .prose p{margin:0 0 1rem} .feat-img img{border-radius:8px;max-width:280px}
.related-read{width:100%;max-width:100%;margin-top:2rem;padding:1.5rem;background:#fff7ed;border-radius:12px;border-left:5px solid var(--accent)} .related-read h2{margin:0 0 .75rem;font-size:1.1rem} .related-read ul{margin:0;padding-left:1.25rem} .related-read li{margin:.35rem 0}
.page-hero{padding:2rem 0 1rem;background:linear-gradient(180deg,rgba(194,65,12,.06),transparent)} .breadcrumb{font-size:.88rem;color:var(--muted);margin-bottom:.5rem} .prose-card{background:var(--card);padding:1.75rem;border-radius:12px;border:2px solid #fed7aa;margin-bottom:1.5rem} .prose-card h2{font-size:1.1rem;margin:1.5rem 0 .75rem;color:var(--accent)} .page-body{padding-bottom:3rem;display:grid;gap:1.5rem}
.error-wrap{text-align:center;padding:4rem 1rem} .error-wrap .code{font-size:4rem;font-weight:700;color:var(--accent);margin:0} .site-footer{background:var(--ink);color:#a8a29e;padding:2rem 0;margin-top:2rem} .site-footer a{color:#fed7aa} .footer-links{display:flex;flex-wrap:wrap;gap:1rem;margin-bottom:.75rem}
@media(max-width:768px){.nav-toggle{display:flex;flex-direction:column} .site-nav{display:none;position:absolute;top:var(--header-h);left:0;right:0;background:var(--card);padding:1rem;border-bottom:3px solid var(--accent)} .site-nav.is-open{display:block} .site-nav ul{flex-direction:column} .pyramid-hero-grid,.pyramid-inner{grid-template-columns:1fr} .pyramid-tier{width:100%!important}}