/* ===========================================================
   HTH主站入口 · 共享样式 /assets/site.css
   近单色深色体系 + 单一荧光绿强调 · 印刷描边 · 零投影
   =========================================================== */

/* ---------- reset ---------- */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;text-size-adjust:100%}
body,h1,h2,h3,h4,h5,h6,p,ul,ol,li,figure,blockquote,dl,dd{margin:0;padding:0}
ul,ol{list-style:none}
img,svg,video{max-width:100%;display:block}
button,input,select,textarea{font:inherit;color:inherit}
button{background:none;border:0;cursor:pointer}
table{border-collapse:collapse;width:100%}
[hidden]{display:none !important}

/* ---------- tokens ---------- */
:root{
  --ink-0:#0B0F0D;
  --ink-1:#121815;
  --ink-2:#1C2622;
  --line:#2E3A34;
  --line-soft:rgba(46,58,52,.62);
  --muted:#8D9A93;
  --text:#E8EFE9;
  --neon:#C6FF3D;
  --neon-dim:rgba(198,255,61,.45);
  --orange:#FF8A2B;
  --orange-dim:rgba(255,138,43,.45);
  --blue:#35C8FF;
  --blue-dim:rgba(53,200,255,.45);
  --paper:#F4F1E9;
  --on-light:#0B0F0D;
  --wrap:1240px;
  --gutter:24px;
  --radius:2px;
  --t:200ms;
  --ease:cubic-bezier(.22,.61,.36,1);
  --font-sans:"Noto Sans SC","Source Han Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  --font-mono:"JetBrains Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,"Liberation Mono",monospace;
}

/* ---------- base ---------- */
html{scroll-behavior:smooth}
body{
  background:var(--ink-0);
  color:var(--text);
  font-family:var(--font-sans);
  font-size:17px;
  line-height:1.78;
  letter-spacing:.01em;
  min-height:100%;
  overflow-x:hidden;
}
body::before{
  content:"";
  position:fixed;
  inset:0;
  z-index:0;
  pointer-events:none;
  background-image:
    radial-gradient(circle at 14% 4%, rgba(198,255,61,.07), transparent 44%),
    radial-gradient(circle at 88% 2%, rgba(53,200,255,.06), transparent 46%),
    linear-gradient(to right, rgba(46,58,52,.30) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(46,58,52,.30) 1px, transparent 1px);
  background-size:auto, auto, 72px 72px, 72px 72px;
}
main{position:relative;z-index:1;display:block}
::selection{background:var(--neon);color:var(--on-light)}
:focus-visible{outline:2px solid var(--neon);outline-offset:2px;border-radius:1px}
a{color:var(--blue);text-decoration:none;transition:color var(--t) var(--ease)}
a:hover{color:var(--neon)}

/* ---------- typography ---------- */
.display,.page-head__title,.masthead__brand{
  font-family:var(--font-sans);
  font-weight:900;
  font-size:clamp(34px,5vw,64px);
  line-height:1.05;
  letter-spacing:-.02em;
}
.headline{font-weight:700;font-size:clamp(22px,2.6vw,30px);line-height:1.25;letter-spacing:-.01em}
.lede{font-size:17px;line-height:1.78;color:var(--muted);max-width:68ch}
.label{
  display:inline-block;
  font-family:var(--font-mono);
  font-size:12px;
  font-weight:500;
  letter-spacing:.18em;
  text-transform:uppercase;
  color:var(--muted);
}
.num,.mono,.tag,.stat__value,.footer-meta__val.num{
  font-family:var(--font-mono);
  font-variant-numeric:tabular-nums;
  letter-spacing:.04em;
}
.num{font-weight:500}
.sr-only{
  position:absolute;width:1px;height:1px;padding:0;margin:-1px;
  overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0;
}

/* ---------- layout primitives ---------- */
.wrap{width:100%;max-width:var(--wrap);margin-inline:auto;padding-inline:var(--gutter)}
.wrap--narrow{max-width:820px}
.section{padding:clamp(28px,5vw,56px) 0;position:relative}
.section--tight{padding:clamp(18px,3vw,30px) 0}
.section--loose{padding:clamp(48px,9vw,104px) 0}
.section__head{display:flex;align-items:baseline;gap:14px;flex-wrap:wrap;margin-bottom:20px}
.section__title{font-weight:800;font-size:clamp(20px,2.4vw,28px);line-height:1.28;letter-spacing:-.01em;color:var(--text)}
.section__title::before{
  content:"";display:inline-block;width:18px;height:3px;background:var(--neon);
  vertical-align:.32em;margin-right:10px;
}
.section__hint{font-size:14px;color:var(--muted);max-width:60ch}
.divider{height:1px;background:var(--line);border:0;margin:0}
.stack>*+*{margin-top:16px}
.stack--sm>*+*{margin-top:8px}
.stack--lg>*+*{margin-top:26px}

.grid{display:grid;gap:18px}
.grid--2{grid-template-columns:repeat(2,minmax(0,1fr))}
.grid--3{grid-template-columns:repeat(3,minmax(0,1fr))}
.grid--4{grid-template-columns:repeat(4,minmax(0,1fr))}
.grid--sidebar{grid-template-columns:248px minmax(0,1fr);gap:34px}
.grid--main-aside{grid-template-columns:minmax(0,1fr) 300px;gap:34px}

/* ---------- header ---------- */
.skip-link{
  position:absolute;left:16px;top:-64px;z-index:200;
  background:var(--neon);color:var(--on-light);
  padding:10px 16px;font-weight:700;font-size:14px;letter-spacing:.04em;
  transition:top 160ms var(--ease);
}
.skip-link:focus{top:12px;color:var(--on-light)}

.site-header{
  position:sticky;top:0;z-index:70;
  background:rgba(11,15,13,.95);
  border-bottom:1px solid var(--line);
  backdrop-filter:blur(8px);
}
.read-progress{
  position:fixed;top:0;left:0;right:0;height:3px;z-index:90;
  pointer-events:none;background:rgba(46,58,52,.55);
}
.read-progress__bar{
  display:block;height:100%;width:100%;
  background:linear-gradient(90deg,var(--neon),var(--blue));
  transform:scaleX(0);transform-origin:0 50%;
}

.masthead{
  position:relative;
  text-align:center;
  padding:22px 0 16px;
  border-bottom:1px solid var(--line);
  transition:padding var(--t) var(--ease);
}
.masthead__inner{padding-inline:132px}
.masthead__brand{
  display:inline-block;
  color:var(--text);
  font-size:clamp(28px,4.4vw,54px);
  text-decoration:none;
}
.masthead__brand:hover{color:var(--text)}
.masthead__tagline{
  margin-top:8px;
  font-family:var(--font-mono);
  font-size:12px;letter-spacing:.16em;
  color:var(--muted);
}
.masthead__jump{
  position:absolute;right:var(--gutter);top:26px;
  display:inline-flex;align-items:center;
  padding:8px 14px;
  border:1px solid var(--blue);
  color:var(--blue);
  background:transparent;
  font-size:13px;font-weight:700;letter-spacing:.06em;
  border-radius:var(--radius);
  transition:background var(--t) var(--ease),color var(--t) var(--ease),border-color var(--t) var(--ease);
}
.masthead__jump:hover{background:var(--blue);color:var(--on-light);border-color:var(--blue)}
.site-header.is-compact .masthead{padding:9px 0 7px}
.site-header.is-compact .masthead__brand{font-size:clamp(20px,2.4vw,30px)}
.site-header.is-compact .masthead__tagline{display:none}
.site-header.is-compact .masthead__jump{top:12px}

.site-nav{background:transparent}
.site-nav__inner{display:flex;align-items:center;justify-content:center;flex-wrap:wrap;gap:8px}
.site-nav__list{display:flex;flex-wrap:wrap;justify-content:center;gap:2px}
.site-nav__item{display:block}
.nav-link{
  position:relative;display:block;
  padding:12px 16px;
  color:var(--muted);
  font-size:15px;font-weight:700;letter-spacing:.02em;
  text-decoration:none;
  transition:color var(--t) var(--ease);
}
.nav-link::after{
  content:"";position:absolute;left:16px;right:16px;bottom:7px;height:2px;
  background:var(--neon);
  transform:scaleX(0);transform-origin:0 50%;
  transition:transform var(--t) var(--ease);
}
.nav-link:hover{color:var(--text)}
.nav-link:hover::after{transform:scaleX(1)}
.nav-link[aria-current="page"]{color:var(--neon)}
.nav-link[aria-current="page"]::after{transform:scaleX(1)}

.nav-toggle{
  display:none;align-items:center;gap:10px;
  padding:10px 14px;
  border:1px solid var(--line);
  background:var(--ink-1);
  color:var(--text);
  font-size:14px;font-weight:700;letter-spacing:.06em;
  border-radius:var(--radius);
  transition:border-color var(--t) var(--ease),color var(--t) var(--ease);
}
.nav-toggle:hover{border-color:var(--neon);color:var(--neon)}
.nav-toggle__bars{
  position:relative;display:inline-block;width:16px;height:2px;background:currentColor;
}
.nav-toggle__bars::before,
.nav-toggle__bars::after{
  content:"";position:absolute;left:0;width:16px;height:2px;background:currentColor;
  transition:transform var(--t) var(--ease);
}
.nav-toggle__bars::before{top:-5px}
.nav-toggle__bars::after{top:5px}
.site-nav[data-open] .nav-toggle__bars{background:transparent}
.site-nav[data-open] .nav-toggle__bars::before{transform:translateY(5px) rotate(45deg)}
.site-nav[data-open] .nav-toggle__bars::after{transform:translateY(-5px) rotate(-45deg)}

/* ---------- footer ---------- */
.site-footer{
  position:relative;z-index:1;
  margin-top:clamp(48px,8vw,96px);
  background:var(--ink-1);
  border-top:1px solid var(--line);
}
.site-footer__inner{padding-block:clamp(36px,5vw,60px) 26px}
.site-footer__brand{
  display:flex;align-items:baseline;gap:16px;flex-wrap:wrap;
  padding-bottom:22px;
  border-bottom:1px solid var(--line);
}
.footer-logo{
  font-weight:900;font-size:clamp(20px,2.4vw,28px);letter-spacing:-.02em;
  color:var(--text);
}
.footer-logo:hover{color:var(--neon)}
.footer-logo__note{font-size:13px;letter-spacing:.14em;color:var(--muted);font-family:var(--font-mono)}
.site-footer__grid{
  display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:28px;
  padding-top:30px;
}
.footer-col__title{
  font-size:12px;font-weight:700;letter-spacing:.2em;text-transform:uppercase;
  color:var(--muted);margin-bottom:14px;
}
.footer-col__title::before{
  content:"";display:block;width:14px;height:2px;background:var(--neon);margin-bottom:10px;
}
.footer-col__list>*+*{margin-top:9px}
.footer-link{
  color:var(--text);font-size:15px;text-decoration:none;
  transition:color var(--t) var(--ease);
}
.footer-link:hover{color:var(--neon)}
.footer-col__list--meta>*+*{margin-top:12px}
.footer-meta{display:flex;flex-direction:column;gap:3px}
.footer-meta__key{font-size:12px;letter-spacing:.14em;color:var(--muted);font-family:var(--font-mono)}
.footer-meta__val{font-size:14px;color:var(--text);word-break:break-word}
.footer-bottom{
  display:flex;justify-content:space-between;align-items:center;gap:14px;flex-wrap:wrap;
  margin-top:34px;padding-top:18px;border-top:1px solid var(--line);
}
.footer-bottom__note{font-size:13px;color:var(--muted)}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;gap:8px;
  padding:11px 18px;
  border:1px solid var(--line);
  background:var(--ink-2);
  color:var(--text);
  font-size:14px;font-weight:700;letter-spacing:.06em;
  border-radius:var(--radius);
  text-decoration:none;cursor:pointer;
  transition:background var(--t) var(--ease),color var(--t) var(--ease),
             border-color var(--t) var(--ease),transform var(--t) var(--ease);
}
.btn:hover{color:var(--neon);border-color:var(--neon);transform:translateY(-1px)}
.btn--primary{background:var(--neon);border-color:var(--neon);color:var(--on-light)}
.btn--primary:hover{background:#d9ff70;border-color:#d9ff70;color:var(--on-light)}
.btn--ghost{background:transparent;border-color:var(--blue);color:var(--blue)}
.btn--ghost:hover{background:var(--blue);color:var(--on-light);border-color:var(--blue)}
.btn--quiet{background:transparent;border-color:var(--line);color:var(--muted)}
.btn--quiet:hover{color:var(--text);border-color:var(--muted)}

/* ---------- breadcrumbs & page head ---------- */
.crumbs{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:12px;font-family:var(--font-mono);letter-spacing:.1em}
.crumbs__link{color:var(--muted)}
.crumbs__link:hover{color:var(--neon)}
.crumbs__sep{color:var(--line)}
.crumbs__current{color:var(--neon)}

.page-head{padding:clamp(30px,5vw,58px) 0 clamp(20px,3vw,30px);border-bottom:1px solid var(--line)}
.page-head__label{
  display:inline-block;font-family:var(--font-mono);font-size:12px;letter-spacing:.2em;
  text-transform:uppercase;color:var(--neon);
  border-left:2px solid var(--neon);padding-left:9px;
}
.page-head__title{margin-top:14px;font-size:clamp(30px,4.4vw,54px);color:var(--text)}
.page-head__lead{margin-top:16px;max-width:66ch;color:var(--muted);font-size:17px}

/* ---------- directory map ---------- */
.index-map{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:1px;background:var(--line);border:1px solid var(--line)}
.index-map__item{
  display:block;background:var(--ink-0);padding:18px 20px;color:var(--text);text-decoration:none;
  transition:background var(--t) var(--ease),color var(--t) var(--ease);
}
.index-map__item:hover{background:var(--ink-2);color:var(--text)}
.index-map__num{display:block;font-family:var(--font-mono);font-size:12px;letter-spacing:.16em;color:var(--neon)}
.index-map__label{display:block;margin-top:8px;font-weight:800;font-size:18px;letter-spacing:-.01em}
.index-map__note{display:block;margin-top:6px;font-size:13px;color:var(--muted);line-height:1.6}

/* ---------- cards ---------- */
.card{
  position:relative;
  background:var(--ink-1);
  border:1px solid var(--line);
  border-radius:var(--radius);
  padding:20px;
}
.card--edge{box-shadow:7px 7px 0 -1px var(--ink-0), 7px 7px 0 0 var(--line-soft)}
.card--paper{
  background:var(--paper);color:var(--on-light);border-color:#d8d3c6;
}
.card--paper .card__title,.card--paper .card__text,.card--paper .card__meta{color:var(--on-light)}
.card--paper .card__text{color:#3b4038}
.card__label{display:block;font-family:var(--font-mono);font-size:12px;letter-spacing:.16em;color:var(--muted);text-transform:uppercase}
.card__title{margin-top:8px;font-weight:700;font-size:20px;line-height:1.3;color:var(--text)}
.card__title a{color:inherit}
.card__title a:hover{color:var(--neon)}
.card__text{margin-top:10px;font-size:15px;color:var(--muted);line-height:1.72}
.card__meta{margin-top:14px;padding-top:12px;border-top:1px solid var(--line);font-size:13px;color:var(--muted)}
.card--paper .card__meta{border-top-color:#d8d3c6}

/* ---------- stats & ticker ---------- */
.stat{display:flex;flex-direction:column;gap:4px}
.stat__value{font-family:var(--font-mono);font-size:clamp(24px,3vw,34px);font-weight:500;color:var(--neon);line-height:1.1}
.stat__label{font-size:12px;letter-spacing:.14em;color:var(--muted);font-family:var(--font-mono);text-transform:uppercase}
.ticker{display:flex;overflow-x:auto;border:1px solid var(--line);background:var(--ink-1);border-radius:var(--radius)}
.ticker__item{
  flex:0 0 auto;padding:10px 16px;border-right:1px solid var(--line);
  font-size:13px;color:var(--muted);white-space:nowrap;
}
.ticker__item:last-child{border-right:0}
.ticker__item strong{color:var(--text);font-family:var(--font-mono);letter-spacing:.04em}

/* ---------- tags ---------- */
.tag{
  display:inline-flex;align-items:center;gap:6px;
  padding:3px 9px;border:1px solid var(--line);border-radius:var(--radius);
  background:var(--ink-2);color:var(--muted);
  font-size:12px;letter-spacing:.1em;text-transform:uppercase;
}
.tag--neon{color:var(--neon);border-color:var(--neon-dim)}
.tag--orange{color:var(--orange);border-color:var(--orange-dim)}
.tag--blue{color:var(--blue);border-color:var(--blue-dim)}
.print-label{
  display:inline-block;background:var(--paper);color:var(--on-light);
  padding:4px 10px;font-size:12px;font-weight:700;letter-spacing:.16em;
  border-radius:var(--radius);
}

/* ---------- tree ---------- */
.tree{position:relative;padding-left:28px}
.tree::before{content:"";position:absolute;left:7px;top:8px;bottom:8px;width:1px;background:var(--line)}
.tree__node{position:relative;padding-bottom:22px}
.tree__node:last-child{padding-bottom:0}
.tree__node::before{
  content:"";position:absolute;left:-28px;top:6px;width:11px;height:11px;
  border:1px solid var(--neon);background:var(--ink-0);
}
.tree__node--done::before{background:var(--neon)}
.tree__step{display:block;font-family:var(--font-mono);font-size:12px;letter-spacing:.16em;color:var(--neon)}
.tree__title{display:block;margin-top:6px;font-weight:700;font-size:17px;color:var(--text)}
.tree__note{display:block;margin-top:6px;font-size:14px;color:var(--muted);line-height:1.7}

/* ---------- side index ---------- */
.side-index{position:sticky;top:132px;padding-left:16px;border-left:1px solid var(--line)}
.side-index__title{font-family:var(--font-mono);font-size:12px;letter-spacing:.18em;color:var(--muted);text-transform:uppercase;margin-bottom:10px}
.side-index__item{
  display:block;padding:8px 0;font-size:14px;color:var(--muted);
  border-bottom:1px solid var(--line-soft);text-decoration:none;
  transition:color var(--t) var(--ease),padding-left var(--t) var(--ease);
}
.side-index__item:hover{color:var(--text)}
.side-index__item.is-active{color:var(--neon);padding-left:6px}

/* ---------- chips / filter ---------- */
.chips{display:flex;flex-wrap:wrap;gap:8px}
.chip{
  padding:6px 13px;border:1px solid var(--line);background:var(--ink-1);
  color:var(--muted);font-size:13px;letter-spacing:.04em;border-radius:var(--radius);
  transition:background var(--t) var(--ease),color var(--t) var(--ease),border-color var(--t) var(--ease);
}
.chip:hover{color:var(--text);border-color:var(--muted)}
.chip[aria-pressed="true"]{background:var(--neon);border-color:var(--neon);color:var(--on-light);font-weight:700}

/* ---------- fold ---------- */
.fold{border:1px solid var(--line);background:var(--ink-1);border-radius:var(--radius)}
.fold+.fold{margin-top:10px}
.fold__trigger{
  display:flex;align-items:center;justify-content:space-between;gap:14px;width:100%;
  padding:14px 18px;text-align:left;color:var(--text);
  transition:background var(--t) var(--ease),color var(--t) var(--ease);
}
.fold__trigger:hover{background:var(--ink-2)}
.fold__title{font-weight:700;font-size:16px;line-height:1.4}
.fold__sign{font-family:var(--font-mono);font-size:18px;color:var(--neon);line-height:1}
.fold[data-open] .fold__trigger{background:var(--ink-2);color:var(--neon)}
.fold__panel{padding:4px 18px 18px;border-top:1px solid var(--line);color:var(--muted);font-size:15px;line-height:1.76}

/* ---------- aside note ---------- */
.aside-note{
  font-size:13px;line-height:1.7;color:var(--muted);
  border-left:2px solid var(--line);padding-left:12px;
}
.aside-note--warn{border-left-color:var(--orange);color:#cbb29a}

/* ---------- media ---------- */
.media{
  position:relative;overflow:hidden;
  border:1px solid var(--line);border-radius:var(--radius);
  background:linear-gradient(150deg,var(--ink-2),var(--ink-1));
}
.media::before{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:
    linear-gradient(to right, rgba(46,58,52,.5) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(46,58,52,.5) 1px, transparent 1px);
  background-size:52px 52px;
  opacity:.55;
}
.media--pitch::after{
  content:"";position:absolute;left:50%;top:50%;width:44%;aspect-ratio:1;
  transform:translate(-50%,-50%);
  border:1px solid rgba(198,255,61,.18);border-radius:50%;
}
.media img{position:relative;width:100%;height:100%;object-fit:cover}
.media--wide{aspect-ratio:16/9}
.media--tall{aspect-ratio:4/5}
.media--square{aspect-ratio:1/1}
.media--screen{aspect-ratio:21/9}
.media__cap{
  position:absolute;left:0;right:0;bottom:0;z-index:2;
  padding:8px 12px;background:rgba(11,15,13,.84);border-top:1px solid var(--line);
  font-size:12px;letter-spacing:.08em;color:var(--muted);
}

/* ---------- motion ---------- */
[data-reveal]{
  opacity:0;transform:translateY(8px);
  transition:opacity 240ms var(--ease),transform 240ms var(--ease);
}
[data-reveal].is-visible{opacity:1;transform:none}

/* ---------- responsive ---------- */
@media (max-width:1080px){
  .grid--sidebar{grid-template-columns:minmax(0,1fr)}
  .side-index{position:static;padding-left:0;border-left:0;border-top:1px solid var(--line);padding-top:14px}
  .grid--main-aside{grid-template-columns:minmax(0,1fr)}
  .grid--4{grid-template-columns:repeat(2,minmax(0,1fr))}
  .masthead__inner{padding-inline:112px}
}
@media (max-width:900px){
  .grid--3{grid-template-columns:repeat(2,minmax(0,1fr))}
  .site-footer__grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:24px}
}
@media (max-width:860px){
  .masthead{padding:14px 0 12px;text-align:center}
  .masthead__inner{padding-inline:16px}
  .masthead__brand{font-size:clamp(22px,7vw,32px)}
  .masthead__tagline{font-size:11px;letter-spacing:.06em;margin-top:6px}
  .masthead__jump{position:static;display:inline-flex;margin-top:10px;padding:7px 12px}
  .site-header.is-compact .masthead__jump{top:auto}
  .site-nav__inner{justify-content:flex-start;padding-bottom:10px}
  .nav-toggle{display:inline-flex}
  .site-nav__list{display:none;width:100%;flex-direction:column;gap:0;margin-top:10px;border-top:1px solid var(--line)}
  .site-nav[data-open] .site-nav__list{display:flex}
  .site-nav__item{border-bottom:1px solid var(--line-soft)}
  .site-nav__item:last-child{border-bottom:0}
  .nav-link{padding:14px 6px;font-size:15px}
  .nav-link::after{left:6px;right:auto;width:26px;bottom:9px}
  .site-header.is-compact .masthead__tagline{display:none}
}
@media (max-width:680px){
  body{font-size:16px}
  :root{--gutter:18px}
  .grid--2,.grid--3,.grid--4{grid-template-columns:minmax(0,1fr)}
  .site-footer__grid{grid-template-columns:minmax(0,1fr);gap:22px}
  .site-footer__brand{flex-direction:column;gap:8px}
  .footer-bottom{flex-direction:column;align-items:flex-start}
  .page-head__lead{font-size:16px}
  .card{padding:16px}
  .card--edge{box-shadow:5px 5px 0 -1px var(--ink-0), 5px 5px 0 0 var(--line-soft)}
}

@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
  }
  [data-reveal]{opacity:1;transform:none}
  .btn:hover{transform:none}
  .read-progress__bar{transition:none}
}