:root{
  --ink:#0B0E14;
  --panel:#161B24;
  --grid:#2A3140;
  --paper:#F2F4F7;
  --paper-2:#DDE3EC;
  --text-dark:#0A0C10;
  --orange:#FF4D00;
  --lava:#D92323;
  --arc:#00C8FF;
  --cyan:#7AF0FF;
  --muted:#8A93A6;
  --maxw:1440px;
  --read:720px;
  --rail:48px;
  --ease:cubic-bezier(.22,.61,.36,1);
  --font-display:"Helvetica Neue","Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  --font-body:"PingFang SC","Hiragino Sans GB","Noto Sans SC","Microsoft YaHei","Source Han Sans SC",system-ui,sans-serif;
  --font-tactical:"Arial Narrow","Impact","Haettenschweiler","PingFang SC","Microsoft YaHei",sans-serif;
  --font-mono:"JetBrains Mono","IBM Plex Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;scroll-padding-top:110px}
body{margin:0;background:var(--ink);color:var(--paper);font-family:var(--font-body);font-size:17px;line-height:1.75;font-weight:400;letter-spacing:.01em;-webkit-font-smoothing:antialiased}
h1,h2,h3,h4{margin:0;font-weight:300;line-height:1.15;letter-spacing:-.01em}
p{margin:0 0 1em}
p:last-child{margin-bottom:0}
ul,ol{margin:0;padding:0;list-style:none}
img,svg,figure{margin:0;max-width:100%}
img{display:block}
a{color:var(--arc);text-decoration:none}
a:hover{color:var(--cyan)}
button{font:inherit}
:focus-visible{outline:2px solid var(--cyan);outline-offset:3px;border-radius:2px}
.skip-link{position:absolute;left:16px;top:-90px;z-index:200;display:inline-block;background:var(--orange);color:var(--text-dark);padding:10px 18px;font-size:14px;font-weight:600;letter-spacing:.08em;border-radius:2px;transition:top .18s var(--ease)}
.skip-link:focus{top:10px;color:var(--text-dark)}
.status-dot{display:block;width:7px;height:7px;background:var(--lava);box-shadow:0 0 0 3px rgba(217,35,35,.18);animation:lh-pulse 2.4s var(--ease) infinite}
@keyframes lh-pulse{0%,100%{opacity:1}50%{opacity:.3}}
.mono{font-family:var(--font-mono);font-variant-numeric:tabular-nums;letter-spacing:.02em}
.site-header{position:sticky;top:0;z-index:90;background:var(--ink);color:var(--paper);border-bottom:1px solid var(--grid)}
.site-header[data-scrolled]{border-bottom-color:var(--orange)}
.scroll-progress{position:absolute;left:0;right:0;bottom:-1px;height:2px;background:linear-gradient(90deg,var(--orange),var(--arc));transform:scaleX(0);transform-origin:0 50%;pointer-events:none}
.header-shell{max-width:var(--maxw);margin:0 auto;padding:0 clamp(14px,3vw,40px)}
.utility-bar{display:flex;align-items:center;justify-content:space-between;gap:12px;min-height:36px;padding:5px 0;border-bottom:1px solid var(--grid)}
.utility-status{display:inline-flex;align-items:center;gap:9px;margin:0;font-family:var(--font-mono);font-size:11px;letter-spacing:.2em;color:var(--muted)}
.utility-actions{display:flex;align-items:center;gap:16px}
.utility-link{color:var(--muted);font-size:12px;letter-spacing:.14em;padding-bottom:1px;border-bottom:1px solid transparent;transition:color .2s var(--ease),border-color .2s var(--ease)}
.utility-link:hover{color:var(--paper);border-bottom-color:var(--orange)}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:11px 20px;border:1px solid var(--grid);border-radius:2px;background:transparent;color:var(--paper);font-family:var(--font-body);font-size:13px;font-weight:600;letter-spacing:.12em;text-decoration:none;cursor:pointer;transition:background .2s var(--ease),color .2s var(--ease),border-color .2s var(--ease)}
.btn:hover{color:var(--paper);border-color:var(--arc)}
.btn-primary{background:var(--orange);border-color:var(--orange);color:var(--text-dark)}
.btn-primary:hover{background:#FF6A29;border-color:#FF6A29;color:var(--text-dark)}
.btn-ghost{border-color:var(--orange);color:var(--orange);background:transparent}
.btn-ghost:hover{background:var(--orange);border-color:var(--orange);color:var(--text-dark)}
.btn-sm{padding:7px 13px;font-size:11px;letter-spacing:.16em}
.btn-row{display:flex;flex-wrap:wrap;gap:12px}
.masthead{position:relative;display:flex;align-items:center;min-height:78px;padding:10px 0}
.brand{position:absolute;left:50%;top:50%;transform:translate(-50%,-50%);display:inline-flex;align-items:center;gap:10px;color:var(--paper);white-space:nowrap}
.brand:hover{color:var(--paper)}
.brand-mark{display:block;width:4px;height:24px;background:var(--orange);transform:rotate(8deg);box-shadow:0 0 12px rgba(255,77,0,.55)}
.brand-name{font-family:var(--font-display);font-weight:300;font-size:clamp(20px,2vw,28px);letter-spacing:.24em;line-height:1}
.brand-badge{font-family:var(--font-mono);font-size:10px;letter-spacing:.14em;color:var(--cyan);border:1px solid rgba(122,240,255,.45);padding:2px 5px;border-radius:2px;line-height:1.3}
.site-nav{width:100%}
.nav-list{display:flex;align-items:center;justify-content:space-between;gap:clamp(8px,1.4vw,24px)}
.nav-spacer{flex:0 0 clamp(180px,19vw,280px);height:1px;align-self:center}
.nav-link{position:relative;display:inline-block;padding:10px 2px;color:var(--paper);font-size:15px;letter-spacing:.08em;transition:color .2s var(--ease)}
.nav-link::after{content:"";position:absolute;left:0;right:0;bottom:3px;height:2px;background:var(--orange);transform:scaleX(0);transform-origin:0 50%;transition:transform .24s var(--ease)}
.nav-link:hover{color:var(--paper)}
.nav-link:hover::after{transform:scaleX(1)}
.nav-link[aria-current="page"]{color:#fff;font-weight:600}
.nav-link[aria-current="page"]::after{transform:scaleX(1)}
.nav-toggle{display:none;align-items:center;gap:8px;padding:9px 12px;border:1px solid var(--grid);border-radius:2px;background:transparent;color:var(--paper);font-size:12px;letter-spacing:.18em;cursor:pointer}
.nav-toggle-line{display:block;width:15px;height:2px;background:var(--orange)}
.nav-toggle[aria-expanded="true"]{border-color:var(--orange)}
.nav-toggle[aria-expanded="true"] .nav-toggle-line:first-child{transform:translateY(3px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] .nav-toggle-line:nth-child(2){transform:translateY(-3px) rotate(-45deg)}
.quick-rail{position:fixed;right:0;top:50%;transform:translateY(-50%);z-index:70;width:var(--rail);display:flex;flex-direction:column;background:var(--panel);border:1px solid var(--grid);border-right:0}
.rail-item{display:flex;flex-direction:column;align-items:center;gap:7px;padding:12px 0;color:var(--muted);border-bottom:1px solid var(--grid);transition:background .2s var(--ease),color .2s var(--ease)}
.rail-item:last-child{border-bottom:0}
.rail-item:hover{background:var(--arc);color:var(--ink)}
.rail-icon{font-family:var(--font-mono);font-size:10px;letter-spacing:.05em;color:var(--orange)}
.rail-item:hover .rail-icon{color:var(--ink)}
.rail-label{writing-mode:vertical-rl;font-size:11px;letter-spacing:.24em}
.site-footer{background:var(--ink);color:var(--paper);border-top:1px solid var(--grid)}
.footer-strip{background:var(--panel);border-bottom:1px solid var(--grid)}
.footer-strip__inner{max-width:var(--maxw);margin:0 auto;padding:16px clamp(16px,4vw,48px);display:flex;flex-wrap:wrap;align-items:center;gap:10px 30px}
.footer-strip__title{margin:0;font-family:var(--font-mono);font-size:11px;letter-spacing:.28em;color:var(--orange)}
.footer-strip__list{display:flex;flex-wrap:wrap;gap:10px 24px}
.footer-strip__list a{display:inline-flex;align-items:center;gap:8px;color:var(--paper);font-size:13px;letter-spacing:.08em;padding-bottom:2px;border-bottom:1px solid var(--grid);transition:color .2s var(--ease),border-color .2s var(--ease)}
.footer-strip__list a:hover{color:var(--arc);border-bottom-color:var(--arc)}
.footer-strip__list .mono{color:var(--orange);font-size:11px}
.footer-body{max-width:var(--maxw);margin:0 auto;padding:clamp(32px,5vw,66px) clamp(16px,4vw,48px);display:grid;grid-template-columns:1.5fr repeat(4,minmax(0,1fr));gap:clamp(22px,3vw,42px)}
.footer-brand__link{display:inline-block;font-family:var(--font-display);font-weight:300;font-size:26px;letter-spacing:.22em;color:var(--paper);line-height:1.2}
.footer-brand__link:hover{color:var(--paper)}
.footer-brand__note{margin:16px 0 0;max-width:34em;font-size:14px;line-height:1.8;color:var(--muted)}
.footer-brand__meta{margin:14px 0 0;font-family:var(--font-mono);font-size:11px;letter-spacing:.2em;color:var(--arc)}
.footer-col__title{margin:0 0 14px;font-family:var(--font-mono);font-size:11px;font-weight:500;letter-spacing:.26em;color:var(--muted)}
.footer-col ul{display:grid;gap:10px}
.footer-col a{color:var(--paper);font-size:14px;letter-spacing:.04em;transition:color .2s var(--ease)}
.footer-col a:hover{color:var(--arc)}
.footer-col a[aria-current="page"]{color:var(--orange)}
.footer-contact{display:grid;gap:9px;font-size:13px;line-height:1.7;color:var(--muted)}
.footer-contact p{margin:0}
.footer-contact .mono{color:var(--arc);font-size:13px}
.footer-legal{max-width:var(--maxw);margin:0 auto;padding:18px clamp(16px,4vw,48px) 30px;display:flex;flex-wrap:wrap;justify-content:space-between;gap:8px 24px;border-top:1px solid var(--grid);font-size:12px;letter-spacing:.06em;color:var(--muted)}
.footer-legal p{margin:0}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 clamp(16px,4vw,48px)}
.read{max-width:var(--read)}
.section{padding:clamp(48px,7vw,104px) 0}
.section--dark{background:var(--ink);color:var(--paper)}
.section--panel{background:var(--panel);color:var(--paper)}
.section--light{background:var(--paper);color:var(--text-dark)}
.section--light .lede,.section--light .eyebrow{color:#4A5468}
.section--light .rule{background:#C9D2E0}
.section--light a{color:#0A6E8C}
.section--light .tag{color:#3A4254;border-color:#C9D2E0;background:rgba(10,12,16,.04)}
.section--light .card{background:var(--paper-2);border-color:#C9D2E0}
.eyebrow{display:block;font-family:var(--font-mono);font-size:12px;letter-spacing:.28em;color:var(--muted);margin-bottom:18px}
.display{font-family:var(--font-display);font-weight:200;font-size:clamp(44px,8vw,124px);line-height:.95;letter-spacing:-.02em}
.chapter-num{display:block;font-family:var(--font-display);font-weight:200;font-size:clamp(52px,8vw,120px);line-height:.82;letter-spacing:-.03em;color:var(--orange)}
.lede{font-size:clamp(16px,1.4vw,19px);line-height:1.7;color:var(--muted);max-width:38em}
.grid{display:grid;gap:clamp(12px,2vw,24px)}
.grid--12{grid-template-columns:repeat(12,minmax(0,1fr))}
.rule{height:1px;background:var(--grid);border:0;margin:0}
.card{position:relative;background:var(--panel);border:1px solid var(--grid);border-radius:2px;padding:clamp(16px,2vw,26px);transition:border-color .24s var(--ease),background .24s var(--ease)}
.card:hover{border-color:var(--arc)}
.tag{display:inline-flex;align-items:center;gap:6px;padding:4px 10px;border:1px solid var(--grid);border-radius:2px;background:rgba(255,255,255,.02);font-family:var(--font-mono);font-size:11px;letter-spacing:.14em;color:var(--muted)}
.tag--hot{border-color:var(--lava);background:rgba(217,35,35,.14);color:#fff}
.tag--data{border-color:rgba(0,200,255,.45);color:var(--arc)}
.stat{display:grid;gap:6px}
.stat__value{font-family:var(--font-mono);font-variant-numeric:tabular-nums;font-size:clamp(24px,3vw,38px);line-height:1;color:var(--arc)}
.stat__label{font-size:11px;letter-spacing:.24em;color:var(--muted)}
.breadcrumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;padding:16px 0;font-family:var(--font-mono);font-size:12px;letter-spacing:.12em;color:var(--muted)}
.breadcrumb a{color:var(--muted)}
.breadcrumb a:hover{color:var(--arc)}
.breadcrumb__sep{color:var(--grid)}
.breadcrumb [aria-current="page"]{color:var(--paper)}
.media-frame{position:relative;display:block;overflow:hidden;background:var(--panel);border:1px solid var(--grid);border-radius:2px;aspect-ratio:16/9}
.media-frame>*{display:block;width:100%;height:100%;object-fit:cover}
.media-frame::after{content:"";position:absolute;inset:0;pointer-events:none;background:linear-gradient(180deg,rgba(11,14,20,.10),rgba(11,14,20,.80)),repeating-linear-gradient(180deg,rgba(11,14,20,.20) 0 1px,transparent 1px 4px)}
.media-frame--tall{aspect-ratio:3/4}
.media-frame--wide{aspect-ratio:21/9}
.media-frame--square{aspect-ratio:1/1}
.media-frame--cut{clip-path:polygon(0 0,100% 0,100% 92%,0 100%)}
.media-frame__cap{position:absolute;left:0;bottom:0;z-index:2;padding:10px 12px;font-family:var(--font-mono);font-size:11px;letter-spacing:.18em;color:var(--paper)}
.js [data-reveal]{opacity:0;transform:translateY(24px);transition:opacity .5s var(--ease),transform .5s var(--ease)}
.js [data-reveal].is-visible{opacity:1;transform:translateY(0)}
@media (max-width:1180px){
  .quick-rail{display:none}
  .footer-body{grid-template-columns:1.4fr repeat(2,minmax(0,1fr))}
}
@media (max-width:1000px){
  html{scroll-padding-top:80px}
  .nav-toggle{display:inline-flex}
  .masthead{justify-content:space-between;min-height:64px;padding:9px 0}
  .brand{position:static;transform:none;margin-right:auto;order:1}
  .nav-toggle{order:2}
  .site-nav{display:none;position:absolute;left:0;right:0;top:100%;width:auto;background:var(--ink);border-bottom:1px solid var(--grid);padding:6px clamp(14px,4vw,32px) 22px;box-shadow:0 18px 40px rgba(0,0,0,.55)}
  .site-header[data-open] .site-nav{display:block}
  .nav-list{flex-direction:column;align-items:stretch;gap:0}
  .nav-spacer{display:none}
  .nav-link{display:block;padding:15px 0;font-size:16px;letter-spacing:.1em;border-bottom:1px solid var(--grid)}
  .nav-link::after{display:none}
  .nav-link:hover{color:var(--arc)}
  .nav-link[aria-current="page"]{color:var(--orange)}
  .utility-bar{min-height:34px}
}
@media (max-width:760px){
  body{font-size:16px}
  .utility-bar{flex-wrap:wrap;gap:6px}
  .utility-status{letter-spacing:.12em;font-size:10px}
  .utility-actions{gap:10px}
  .brand-name{font-size:20px;letter-spacing:.18em}
  .footer-body{grid-template-columns:1fr 1fr}
  .footer-brand{grid-column:1 / -1}
  .footer-legal{flex-direction:column}
}
@media (max-width:520px){
  .footer-body{grid-template-columns:1fr}
  .footer-strip__inner{padding:14px 16px}
  .display{font-size:clamp(34px,11vw,56px)}
}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  .status-dot{animation:none}
  .js [data-reveal]{opacity:1;transform:none;transition:none}
  .btn,.nav-link,.rail-item,.card,.media-frame{transition:none}
}