/* ===== 1. reset ===== */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;scroll-padding-top:132px}
body{margin:0}
h1,h2,h3,h4,h5,h6,p,figure,blockquote,dl,dd{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
img,svg,picture{max-width:100%;display:block}
button{font:inherit;color:inherit;background:none;border:0}
a{color:inherit;text-decoration:none}
hr{border:0}

/* ===== 2. variables ===== */
:root{
  --ink:#07130F;
  --ink-2:#0C1F17;
  --surface:#132A20;
  --paper:#F4F7F2;
  --muted:#8FA89B;
  --lime:#C6FF3D;
  --amber:#FFB45A;
  --grid-cyan:#4F7A66;
  --lime-soft:#E8FFB0;
  --charcoal:#1B2420;
  --line:rgba(143,168,155,.22);
  --line-strong:rgba(143,168,155,.42);
  --shell:1240px;
  --r-pill:999px;
  --r-lg:28px;
  --r-md:18px;
  --gap:24px;
  --font-display:"Noto Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,sans-serif;
  --font-body:"Noto Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  --font-mono:"IBM Plex Mono","JetBrains Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
}

/* ===== 3. base ===== */
body{
  background-color:var(--ink);
  background-image:
    radial-gradient(920px 540px at 84% -10%,rgba(198,255,61,.10),transparent 70%),
    radial-gradient(760px 500px at 4% 2%,rgba(79,122,102,.24),transparent 74%),
    repeating-linear-gradient(90deg,rgba(79,122,102,.07) 0 1px,transparent 1px 88px),
    repeating-linear-gradient(0deg,rgba(79,122,102,.07) 0 1px,transparent 1px 88px);
  color:var(--paper);
  font-family:var(--font-body);
  font-size:16px;
  line-height:1.7;
  font-weight:400;
  min-height:100vh;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
::selection{background:var(--lime);color:var(--ink)}
:focus-visible{outline:2px solid var(--lime);outline-offset:3px;border-radius:6px}
#main-content:focus{outline:none}

/* ===== 4. layout utilities ===== */
.shell{width:min(var(--shell),calc(100% - 40px));margin-inline:auto}
.section{padding:clamp(48px,7vw,92px) 0}
.section--tight{padding:clamp(26px,4vw,46px) 0}
.section-head{display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;gap:16px;margin-bottom:clamp(20px,3vw,32px)}
.stack{display:flex;flex-direction:column;gap:16px}
.cluster{display:flex;flex-wrap:wrap;align-items:center;gap:10px}
.rule{height:1px;background:var(--line);margin:0}
.grid-12{display:grid;grid-template-columns:repeat(12,minmax(0,1fr));gap:var(--gap)}
.span-3{grid-column:span 3}
.span-4{grid-column:span 4}
.span-5{grid-column:span 5}
.span-6{grid-column:span 6}
.span-7{grid-column:span 7}
.span-8{grid-column:span 8}
.span-12{grid-column:span 12}

/* ===== 5. typography utilities ===== */
.kicker{display:inline-flex;align-items:center;gap:9px;font-family:var(--font-mono);font-size:11px;letter-spacing:.2em;text-transform:uppercase;color:var(--lime)}
.kicker::before{content:"";width:8px;height:8px;border-radius:50%;background:var(--lime);box-shadow:0 0 0 4px rgba(198,255,61,.14)}
.display{font-family:var(--font-display);font-weight:900;font-size:clamp(34px,6vw,68px);line-height:1.02;letter-spacing:-.04em}
.h2{font-family:var(--font-display);font-weight:900;font-size:clamp(24px,3.4vw,36px);line-height:1.16;letter-spacing:-.03em}
.h3{font-family:var(--font-display);font-weight:800;font-size:clamp(18px,2vw,22px);line-height:1.3;letter-spacing:-.02em}
.lede{font-size:clamp(15px,1.5vw,17px);line-height:1.8;color:rgba(244,247,242,.78);max-width:62ch}
.muted{color:var(--muted)}
.num{font-family:var(--font-mono);font-variant-numeric:tabular-nums;letter-spacing:-.01em}
.prose{max-width:68ch;font-size:16px;line-height:1.85;color:rgba(244,247,242,.86)}
.prose h2{font-family:var(--font-display);font-weight:900;font-size:clamp(22px,2.6vw,30px);letter-spacing:-.03em;margin:2.2em 0 .6em;line-height:1.2}
.prose h3{font-weight:800;font-size:19px;letter-spacing:-.01em;margin:1.8em 0 .5em}
.prose p{margin:0 0 1.05em}
.prose ul,.prose ol{margin:0 0 1.1em;padding-left:1.25em}
.prose ul{list-style:disc}
.prose ol{list-style:decimal}
.prose li{margin:.3em 0}
.prose a{color:var(--lime);text-decoration:underline;text-underline-offset:3px}
.prose strong{color:var(--paper);font-weight:700}
.prose code{font-family:var(--font-mono);font-size:.9em;background:var(--surface);border:1px solid var(--line);border-radius:6px;padding:1px 6px}
.prose blockquote{border-left:2px solid var(--lime);padding-left:16px;color:var(--muted);margin:1.4em 0}

/* ===== 6. buttons & tags ===== */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:12px 22px;border-radius:var(--r-pill);border:1px solid transparent;font-family:var(--font-body);font-size:14px;font-weight:700;letter-spacing:.01em;cursor:pointer;transition:background-color .18s ease,color .18s ease,border-color .18s ease,transform .18s ease}
.btn-primary{background:var(--lime);color:var(--ink);border-color:var(--lime)}
.btn-primary:hover{background:var(--lime-soft);border-color:var(--lime-soft);transform:translateY(-1px)}
.btn-ghost{background:transparent;color:var(--paper);border-color:var(--line-strong)}
.btn-ghost:hover{border-color:var(--lime);color:var(--lime)}
.btn-amber{background:var(--amber);color:var(--ink);border-color:var(--amber)}
.btn-amber:hover{background:#ffc681;border-color:#ffc681}
.btn-row{display:flex;flex-wrap:wrap;gap:12px;margin-top:22px}
.tag{display:inline-flex;align-items:center;gap:6px;padding:4px 11px;border-radius:var(--r-pill);border:1px solid var(--line);background:rgba(19,42,32,.66);color:var(--muted);font-family:var(--font-mono);font-size:11px;letter-spacing:.08em;white-space:nowrap}
.tag--lime{background:var(--lime);border-color:var(--lime);color:var(--ink)}
.tag--amber{background:rgba(255,180,90,.12);border-color:rgba(255,180,90,.5);color:var(--amber)}
.tag--soft{background:var(--lime-soft);border-color:var(--lime-soft);color:var(--ink)}

/* ===== 7. panels / cards / stats / bands ===== */
.panel{background:var(--ink-2);border:1px solid var(--line);border-radius:var(--r-lg);padding:clamp(20px,2.4vw,32px)}
.panel--surface{background:var(--surface)}
.card{display:block;background:var(--ink-2);border:1px solid var(--line);border-radius:var(--r-md);padding:20px;color:inherit;transition:border-color .18s ease,background-color .18s ease,transform .18s ease}
.card:hover,.card:focus-visible{border-color:var(--lime);background:var(--surface);transform:translateY(-2px)}
.card-title{font-family:var(--font-display);font-size:17px;font-weight:800;letter-spacing:-.01em;line-height:1.35}
.card-text{font-size:14px;color:var(--muted);margin-top:6px;line-height:1.7}
.band{background:var(--ink-2);border:1px solid var(--line);border-radius:var(--r-lg);padding:clamp(20px,3vw,36px)}
.band--lime{background:var(--lime);border-color:var(--lime);color:var(--ink)}
.band--lime .muted{color:rgba(7,19,15,.66)}
.band--lime .kicker{color:rgba(7,19,15,.7)}
.band--lime .kicker::before{background:var(--ink);box-shadow:0 0 0 4px rgba(7,19,15,.12)}
.stat-row{display:flex;flex-wrap:wrap;gap:10px}
.stat{flex:1 1 130px;min-width:0;background:var(--surface);border:1px solid var(--line);border-radius:var(--r-md);padding:14px 16px}
.stat-value{font-family:var(--font-mono);font-variant-numeric:tabular-nums;font-size:clamp(20px,2.4vw,26px);font-weight:700;letter-spacing:-.02em;color:var(--lime);line-height:1.15}
.stat-label{font-family:var(--font-mono);font-size:11px;letter-spacing:.14em;text-transform:uppercase;color:var(--muted);margin-top:4px}

/* ===== 8. media frames (image containers) ===== */
.media-frame{position:relative;overflow:hidden;border-radius:var(--r-lg);border:1px solid var(--line);aspect-ratio:16/9;
  background-color:var(--ink-2);
  background-image:
    linear-gradient(135deg,rgba(79,122,102,.36),rgba(7,19,15,.92)),
    repeating-linear-gradient(90deg,rgba(79,122,102,.20) 0 1px,transparent 1px 34px),
    repeating-linear-gradient(0deg,rgba(79,122,102,.20) 0 1px,transparent 1px 34px);
}
.media-frame > img,.media-frame > picture > img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover}
.media-frame--wide{aspect-ratio:21/9}
.media-frame--hero{aspect-ratio:16/11}
.media-frame--square{aspect-ratio:1/1}
.media-frame--tall{aspect-ratio:4/5}
.media-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:16px}
.media-caption{font-family:var(--font-mono);font-size:11px;letter-spacing:.06em;color:var(--muted);margin-top:8px}

/* ===== 9. breadcrumb / toc / reveal ===== */
.breadcrumb{margin-top:22px}
.breadcrumb-list{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-family:var(--font-mono);font-size:11px;letter-spacing:.08em;color:var(--muted)}
.breadcrumb-item{display:inline-flex;align-items:center;gap:8px}
.breadcrumb-item + .breadcrumb-item::before{content:"/";color:var(--grid-cyan)}
.breadcrumb-link{color:var(--muted);transition:color .16s ease}
.breadcrumb-link:hover{color:var(--lime)}
.breadcrumb-item[aria-current="page"]{color:var(--paper)}
.toc{position:sticky;top:140px;font-size:13px}
.toc-title{font-family:var(--font-mono);font-size:11px;letter-spacing:.18em;text-transform:uppercase;color:var(--muted);margin-bottom:10px}
.toc-list{display:flex;flex-direction:column;border-left:1px solid var(--line)}
.toc-link{display:block;padding:7px 12px;margin-left:-1px;border-left:2px solid transparent;color:var(--muted);transition:color .16s ease,border-color .16s ease}
.toc-link:hover{color:var(--paper)}
.toc-link[aria-current="true"]{color:var(--lime);border-left-color:var(--lime)}
[data-reveal]{transition:opacity .5s ease,transform .5s ease}
.reveal-ready [data-reveal]:not(.is-visible){opacity:0;transform:translateY(16px)}
[data-reveal].is-visible{opacity:1;transform:none}

/* ===== 10. header ===== */
.skip-link{position:fixed;left:16px;top:-72px;z-index:200;padding:10px 20px;border-radius:var(--r-pill);background:var(--lime);color:var(--ink);font-weight:700;font-size:14px;transition:top .18s ease}
.skip-link:focus{top:14px}
.scroll-progress{position:fixed;left:0;right:0;top:0;height:3px;z-index:120;pointer-events:none;background:rgba(143,168,155,.14)}
.scroll-progress span{display:block;height:100%;width:0;background:linear-gradient(90deg,var(--lime),var(--amber))}
.site-header{position:sticky;top:0;z-index:90;padding:12px 0 10px;
  background:linear-gradient(180deg,rgba(7,19,15,.97) 0%,rgba(7,19,15,.88) 58%,rgba(7,19,15,0) 100%)}
.header-shell{position:relative;width:min(var(--shell),calc(100% - 32px));margin-inline:auto;display:flex;align-items:center;gap:14px;
  padding:8px 10px 8px 16px;border:1px solid var(--line);border-radius:var(--r-pill);
  background:rgba(12,31,23,.92);
  -webkit-backdrop-filter:blur(14px);backdrop-filter:blur(14px);
  transition:padding .22s ease,box-shadow .22s ease,border-color .22s ease}
.site-header.is-condensed .header-shell{padding:5px 8px 5px 14px;box-shadow:0 16px 40px rgba(0,0,0,.5);border-color:var(--line-strong)}
.brand{display:inline-flex;align-items:center;gap:10px;flex:0 0 auto}
.brand-mark{position:relative;width:32px;height:32px;border-radius:50%;border:1px solid rgba(198,255,61,.6);background:radial-gradient(circle at 30% 30%,rgba(198,255,61,.28),transparent 70%)}
.brand-mark::after{content:"";position:absolute;inset:0;margin:auto;width:8px;height:8px;border-radius:50%;background:var(--lime);box-shadow:0 0 12px rgba(198,255,61,.7)}
.brand-text{display:flex;flex-direction:column;line-height:1.1}
.brand-name{font-family:var(--font-display);font-weight:900;font-size:17px;letter-spacing:-.02em;color:var(--paper)}
.brand-note{font-family:var(--font-mono);font-size:10px;letter-spacing:.06em;color:var(--muted);margin-top:2px}
.header-status{display:inline-flex;align-items:center;gap:7px;font-family:var(--font-mono);font-size:11px;letter-spacing:.08em;color:var(--muted);white-space:nowrap}
.status-dot{width:6px;height:6px;border-radius:50%;background:var(--lime);box-shadow:0 0 0 4px rgba(198,255,61,.14);transition:transform .2s ease}
.header-status:hover .status-dot{transform:scale(1.35)}
.nav-toggle{display:none;align-items:center;gap:8px;margin-left:auto;padding:9px 14px;border:1px solid var(--line-strong);border-radius:var(--r-pill);
  color:var(--paper);font-family:var(--font-mono);font-size:12px;letter-spacing:.08em;cursor:pointer;transition:border-color .18s ease,color .18s ease}
.nav-toggle:hover{border-color:var(--lime);color:var(--lime)}
.nav-toggle-lines{display:inline-flex;flex-direction:column;gap:4px;width:16px}
.nav-toggle-lines span{display:block;height:2px;border-radius:2px;background:currentColor;transition:transform .2s ease}
.site-header[data-open="true"] .nav-toggle-lines span:first-child{transform:translateY(3px) rotate(45deg)}
.site-header[data-open="true"] .nav-toggle-lines span:last-child{transform:translateY(-3px) rotate(-45deg)}
.site-nav{display:flex;align-items:center;gap:6px;margin-left:auto}
.nav-list{display:flex;align-items:center;gap:2px}
.nav-item{display:block}
.nav-link{display:block;padding:9px 13px;border:1px solid transparent;border-radius:var(--r-pill);font-size:14px;font-weight:500;color:rgba(244,247,242,.78);white-space:nowrap;transition:color .18s ease,background-color .18s ease,border-color .18s ease}
.nav-link:hover{color:var(--lime);border-color:rgba(198,255,61,.5);background:rgba(198,255,61,.08)}
.nav-link[aria-current="page"]{background:var(--lime);border-color:var(--lime);color:var(--ink);font-weight:700}
.nav-cta{display:inline-flex;align-items:center;justify-content:center;padding:9px 16px;border:1px solid var(--lime);border-radius:var(--r-pill);
  color:var(--lime);font-size:13px;font-weight:700;white-space:nowrap;transition:background-color .18s ease,color .18s ease}
.nav-cta:hover{background:var(--lime);color:var(--ink)}
.entry-strip{width:min(var(--shell),calc(100% - 32px));margin:9px auto 0;display:flex;align-items:center;gap:10px}
.entry-strip-label{font-family:var(--font-mono);font-size:10px;letter-spacing:.2em;text-transform:uppercase;color:var(--muted);flex:0 0 auto}
.entry-strip-list{display:flex;align-items:center;gap:6px;overflow-x:auto;scrollbar-width:none;-ms-overflow-style:none;padding-bottom:2px}
.entry-strip-list::-webkit-scrollbar{display:none}
.entry-chip{display:inline-flex;align-items:center;gap:6px;padding:5px 12px;border:1px solid var(--line);border-radius:var(--r-pill);
  background:rgba(19,42,32,.72);color:rgba(244,247,242,.86);font-size:12px;white-space:nowrap;transition:border-color .18s ease,color .18s ease,background-color .18s ease}
.entry-chip::before{content:"";width:5px;height:5px;border-radius:50%;background:var(--amber);flex:0 0 auto}
.entry-chip:hover{border-color:var(--lime);color:var(--lime);background:rgba(198,255,61,.08)}

/* ===== 11. footer ===== */
.site-footer{position:relative;margin-top:clamp(56px,8vw,104px);border-top:1px solid var(--line);background:var(--ink);overflow:hidden}
.site-footer::before{content:"";position:absolute;top:-160px;right:-80px;width:520px;height:420px;pointer-events:none;
  background:radial-gradient(circle,rgba(198,255,61,.14),transparent 68%)}
.footer-inner{position:relative;width:min(var(--shell),calc(100% - 40px));margin-inline:auto;padding:clamp(40px,5vw,68px) 0 26px}
.footer-grid{display:grid;grid-template-columns:minmax(0,1.5fr) minmax(0,2fr);gap:clamp(24px,4vw,56px)}
.footer-brand-block{min-width:0}
.footer-brand{font-family:var(--font-display);font-weight:900;font-size:clamp(24px,3vw,32px);letter-spacing:-.035em;line-height:1.1}
.footer-tagline{margin-top:6px;font-size:13px;color:var(--muted)}
.footer-contact{margin-top:22px;display:flex;flex-direction:column;gap:9px}
.contact-line{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:rgba(244,247,242,.8)}
.contact-key{font-family:var(--font-mono);font-size:10px;letter-spacing:.16em;text-transform:uppercase;color:var(--muted);min-width:32px}
.contact-value{word-break:break-word}
.copy-btn{padding:1px 10px;border:1px dashed var(--line-strong);border-radius:var(--r-pill);color:var(--muted);
  font-family:var(--font-mono);font-size:10px;letter-spacing:.08em;cursor:pointer;transition:color .16s ease,border-color .16s ease,background-color .16s ease}
.copy-btn:hover{color:var(--lime);border-color:var(--lime)}
.copy-btn[data-copied="true"]{background:var(--lime);border-color:var(--lime);border-style:solid;color:var(--ink)}
.footer-nav{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px;min-width:0}
.footer-col{min-width:0}
.footer-col-title{font-family:var(--font-mono);font-size:11px;letter-spacing:.18em;text-transform:uppercase;color:var(--lime);margin-bottom:14px}
.footer-links{display:flex;flex-direction:column;gap:9px}
.footer-link{display:inline-block;width:fit-content;font-size:14px;color:rgba(244,247,242,.72);border-bottom:1px solid transparent;padding-bottom:1px;transition:color .16s ease,border-color .16s ease}
.footer-link:hover{color:var(--lime);border-bottom-color:var(--lime)}
.footer-bottom{margin-top:clamp(28px,4vw,48px);padding-top:20px;border-top:1px solid var(--line);display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:14px}
.footer-legal-text,.footer-meta{font-family:var(--font-mono);font-size:11px;letter-spacing:.06em;color:var(--muted)}
.to-top{display:inline-flex;align-items:center;gap:6px;padding:7px 16px;border:1px solid var(--line-strong);border-radius:var(--r-pill);
  color:var(--paper);font-size:12px;cursor:pointer;transition:border-color .18s ease,color .18s ease}
.to-top:hover{border-color:var(--lime);color:var(--lime)}

/* ===== 12. responsive ===== */
@media (max-width:1180px){
  .header-status{display:none}
}
@media (max-width:1024px){
  .grid-12{gap:18px}
  .span-3,.span-4,.span-5{grid-column:span 6}
  .span-7,.span-8{grid-column:span 12}
  .footer-grid{grid-template-columns:minmax(0,1fr)}
}
@media (max-width:960px){
  .nav-toggle{display:inline-flex}
  .site-nav{position:absolute;left:0;right:0;top:calc(100% + 10px);display:none;flex-direction:column;align-items:stretch;gap:6px;
    padding:14px;border:1px solid var(--line-strong);border-radius:26px;background:rgba(12,31,23,.99);
    -webkit-backdrop-filter:blur(16px);backdrop-filter:blur(16px);box-shadow:0 26px 60px rgba(0,0,0,.6)}
  .site-header[data-open="true"] .site-nav{display:flex}
  .nav-list{flex-direction:column;align-items:stretch;gap:2px}
  .nav-link{padding:12px 14px;font-size:15px}
  .nav-cta{margin-top:8px;padding:13px 16px}
  .brand-note{display:none}
  .footer-nav{grid-template-columns:repeat(2,minmax(0,1fr));gap:22px}
}
@media (max-width:640px){
  html{scroll-padding-top:150px}
  .shell,.header-shell,.entry-strip,.footer-inner{width:calc(100% - 24px)}
  .grid-12{grid-template-columns:repeat(4,minmax(0,1fr));gap:14px}
  .span-3,.span-4,.span-5,.span-6,.span-7,.span-8,.span-12{grid-column:span 4}
  .site-header{padding-top:8px}
  .header-shell{gap:8px;padding-left:12px}
  .brand-name{font-size:16px}
  .entry-strip-label{display:none}
  .entry-chip{font-size:11px;padding:4px 10px}
  .footer-nav{grid-template-columns:1fr}
  .footer-bottom{justify-content:flex-start}
  .toc{position:static;top:auto}
}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{animation-duration:.01ms !important;animation-iteration-count:1 !important;transition-duration:.01ms !important}
  [data-reveal],.reveal-ready [data-reveal]:not(.is-visible){opacity:1 !important;transform:none !important}
  .card:hover,.btn:hover{transform:none}
}