:root{--bg:#f4f7f6;--bg2:#e8efed;--ink:#13201c;--muted:#3f4f4a;--line:#cfdad6;--soft:#ffffff;--accent:#0a5c59;--accent2:#9a3412;--on-accent:#ffffff;--max:1100px;--radius:16px;--font:"Noto Sans SC",sans-serif;--display:"ZCOOL XiaoWei",serif;--max:1040px;--radius:12px;--section-pad:2.8rem 0;--panel-pad:1.35rem 1.55rem;--grid-cols:3;--cap:0.95rem;--lead:1.02rem;--h1s:1.8;--section-gap:1.4rem;--btn-radius:10px;--prose:800px;--shot-gap:1.5rem;--soft-a:1;--img-shadow:none;--lh:1.85;--hero-gap:1.5rem}

*{box-sizing:border-box}html{scroll-behavior:smooth}
body{margin:0;font-family:var(--font);color:var(--ink);background:linear-gradient(180deg,var(--bg),var(--bg2));line-height:var(--lh,1.75);min-height:100vh}
a{color:var(--accent);text-underline-offset:3px}a:hover{color:var(--accent2)}
img{max-width:100%;height:auto;display:block}
.container{width:min(100% - 2rem,var(--max));margin-inline:auto}
.site-header{position:sticky;top:0;z-index:50;backdrop-filter:blur(12px);background:color-mix(in srgb,var(--bg) 88%,transparent);border-bottom:1px solid var(--line)}
.header-inner,.masthead{display:flex;align-items:center;justify-content:space-between;gap:1rem;padding:.85rem 0;flex-wrap:wrap}
.brand{display:flex;align-items:center;gap:.7rem;color:inherit;text-decoration:none;font-family:var(--display);font-size:1.35rem}
.brand img{width:40px;height:40px;border-radius:12px}
.nav{display:flex;align-items:center;gap:1rem;flex-wrap:wrap}
.nav a{color:var(--ink);text-decoration:none;font-size:.95rem}
.menu-toggle{display:none;border:1px solid var(--line);background:var(--soft);border-radius:10px;width:44px;height:44px;cursor:pointer}
.menu-toggle span{display:block;width:18px;height:2px;background:var(--ink);margin:4px auto}
.eyebrow{display:inline-block;color:var(--muted);font-size:.85rem;margin-bottom:.6rem}
h1,h2,h3{font-family:var(--display);line-height:1.25}
h1{font-size:clamp(1.45rem,2.8vw,calc(1rem * var(--h1s,1.7)));margin:0 0 .8rem}
h2{font-size:1.4rem;margin:0 0 .55rem}
.lead{color:var(--ink);font-size:var(--lead,1.05rem);margin:0 0 1.2rem;max-width:46rem}
.cta-row{display:flex;flex-wrap:wrap;gap:.8rem}
.btn{display:inline-flex;align-items:center;justify-content:center;padding:.75rem 1.15rem;border-radius:var(--btn-radius,999px);text-decoration:none;font-weight:600}
a.btn-primary,.btn-primary{background:var(--accent,#111827);background-color:var(--accent,#111827);color:#ffffff !important;-webkit-text-fill-color:#ffffff;border:1px solid color-mix(in srgb,var(--accent,#111827) 65%,#000000)}
a.btn-primary:hover,.btn-primary:hover{filter:brightness(.9);color:#ffffff !important}
a.btn-secondary,.btn-secondary{background:var(--soft,#ffffff);color:var(--ink,#111111) !important;-webkit-text-fill-color:var(--ink,#111111);border:1px solid var(--line,#cccccc)}
a.btn-secondary:hover,.btn-secondary:hover{border-color:var(--accent);color:var(--accent) !important;-webkit-text-fill-color:var(--accent)}
.section{padding:var(--section-pad,2rem 0)}.section-head{margin-bottom:var(--section-gap,1rem)}.section-head p,.deck{margin:0;color:var(--muted)}
.panel,.callout,.prose{background:var(--soft);border:1px solid var(--line);border-radius:var(--radius);padding:var(--panel-pad,1.15rem 1.25rem)}
.panel-follow{margin-top:1rem}.cta-follow{margin-top:1rem}
.tag-row{display:flex;flex-wrap:wrap;gap:.5rem;margin-top:1rem}
.tag{background:color-mix(in srgb,var(--accent) 12%,var(--soft));border:1px solid var(--line);border-radius:999px;padding:.25rem .7rem;font-size:.85rem;color:var(--ink)}
.shot-grid{display:grid;gap:var(--shot-gap,1rem);grid-template-columns:repeat(var(--grid-cols,3),minmax(0,1fr))}
.shot-grid-2{margin-top:1rem}
.shot{margin:0}
.shot figcaption,.rail-card figcaption{margin-top:.7rem;color:var(--ink);font-size:var(--cap,0.98rem);line-height:1.65;background:var(--soft);border:1px solid var(--line);border-radius:10px;padding:.65rem .75rem;}
.shot img,.hero-shot img,.rail-card img,.dark-hero-media img{border-radius:var(--radius);border:1px solid var(--line);box-shadow:var(--img-shadow,0 18px 40px rgba(0,0,0,.08))}
.list-check{padding-left:1.1rem}.list-check li{margin:.4rem 0}
.faq details,.faq-item{background:var(--soft);border:1px solid var(--line);border-radius:12px;padding:.85rem 1rem;margin-bottom:.75rem}
.faq summary{cursor:pointer;font-weight:600}
.site-footer{margin-top:2rem;padding:2rem 0 1.2rem;border-top:1px solid var(--line);background:color-mix(in srgb,var(--soft) 70%,transparent)}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr;gap:1.5rem}
.footer-note{color:var(--muted);margin:.8rem 0 0}
.site-footer h3{margin:0 0 .6rem;font-size:1rem}.site-footer ul{list-style:none;padding:0;margin:0}.site-footer li{margin:.35rem 0}
.copyright{padding:1rem 0 0;color:var(--muted);font-size:.9rem}
.page-hero{padding:1.5rem 0 .5rem}.error-box{padding:2rem 0 3rem;text-align:center}
@media(max-width:1100px){.shot-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media(max-width:900px){
  .menu-toggle{display:block}
  .nav{display:none;position:absolute;left:1rem;right:1rem;top:64px;flex-direction:column;align-items:stretch;background:var(--soft);border:1px solid var(--line);border-radius:14px;padding:.8rem;z-index:60}
  .nav.open{display:flex}
  .shot-grid,.footer-grid,.rail-track{grid-template-columns:1fr}
}


.hero-split{padding:2.2rem 0 1rem}
.hero-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:var(--hero-gap,2rem);align-items:center}
@media(max-width:900px){.hero-grid{grid-template-columns:1fr}}

/* site layout fingerprint v27 */