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

:root{
  --ink:#07070C;
  --ink-2:#0B0B14;
  --panel:#12121A;
  --violet:#7A3BFF;
  --violet-soft:rgba(122,59,255,.16);
  --violet-line:rgba(122,59,255,.55);
  --cyan:#19E3D1;
  --cyan-soft:rgba(25,227,209,.12);
  --gold:#FFA62B;
  --red:#FF3B5C;
  --paper:#F2EADF;
  --paper-ink:#1A1A22;
  --grid:#3A3F4B;
  --grid-soft:rgba(58,63,75,.5);
  --read:#F5F6FA;
  --read-70:rgba(245,246,250,.72);
  --read-45:rgba(245,246,250,.5);
  --font-display:"Arial Narrow","Helvetica Neue Condensed","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  --font-body:system-ui,-apple-system,"PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  --font-mono:ui-monospace,SFMono-Regular,Menlo,Consolas,"DejaVu Sans Mono",monospace;
  --shell:1280px;
  --gap:24px;
  --radius:2px;
}

body{
  background-color:var(--ink);
  background-image:
    linear-gradient(rgba(58,63,75,.10) 1px,transparent 1px),
    linear-gradient(90deg,rgba(58,63,75,.10) 1px,transparent 1px);
  background-size:88px 88px;
  color:var(--read);
  font-family:var(--font-body);
  font-size:16px;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
}
::selection{background:var(--violet);color:#fff}
:focus-visible{outline:2px solid var(--cyan);outline-offset:2px}
.visually-hidden{position:absolute !important;width:1px;height:1px;margin:-1px;padding:0;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0}
.mono{font-family:var(--font-mono);font-variant-numeric:tabular-nums;letter-spacing:-.01em}
.num{font-family:var(--font-mono);font-variant-numeric:tabular-nums;text-align:right}
.index-label{display:inline-block;font:600 11px/1.5 var(--font-mono);letter-spacing:.14em;text-transform:uppercase;color:var(--cyan)}
.rule{height:1px;background:var(--grid);border:0}

.shell{width:100%;max-width:var(--shell);margin-inline:auto;padding-inline:clamp(16px,3vw,40px)}

/* ---------- 跳至主要内容 ---------- */
.skip-link{
  position:fixed;top:8px;left:8px;z-index:200;
  transform:translateY(-200%);
  padding:11px 18px;background:var(--cyan);color:#04110F;
  font:700 13px/1 var(--font-body);letter-spacing:.04em;border-radius:var(--radius);
  transition:transform .16s ease;
}
.skip-link:focus{transform:none}

/* ---------- 头部 ---------- */
.site-header{
  position:sticky;top:0;z-index:80;
  background:var(--ink);
  border-bottom:1px solid var(--grid);
}
.refresh-bar{
  display:flex;align-items:center;gap:14px;
  min-height:30px;padding:0 clamp(16px,3vw,40px);
  background:#0A0A12;border-bottom:1px solid var(--grid);
  font:500 11px/1 var(--font-mono);letter-spacing:.12em;text-transform:uppercase;
  color:var(--read-45);
}
.refresh-bar__pulse{
  flex:none;width:6px;height:6px;border-radius:50%;background:var(--cyan);
  animation:ab-pulse 2.4s ease-out infinite;
}
@keyframes ab-pulse{
  0%{box-shadow:0 0 0 0 rgba(25,227,209,.55)}
  70%{box-shadow:0 0 0 8px rgba(25,227,209,0)}
  100%{box-shadow:0 0 0 0 rgba(25,227,209,0)}
}
.refresh-bar__text{color:var(--read-70);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.refresh-bar__meter{
  margin-left:auto;flex:1 1 auto;max-width:260px;height:2px;
  background:var(--grid);position:relative;overflow:hidden;
}
.refresh-bar__fill{
  position:absolute;inset:0;
  background:linear-gradient(90deg,var(--violet),var(--cyan));
  transform:scaleX(1);transform-origin:left center;
}
.refresh-bar__clock{flex:none;color:var(--cyan)}

.site-header__inner{
  display:grid;grid-template-columns:auto 1fr auto auto;
  align-items:center;gap:20px;min-height:68px;
}
.brand{display:flex;align-items:center;gap:12px;min-width:0}
.brand__mark{
  position:relative;flex:none;display:grid;place-items:center;
  width:36px;height:36px;border:1px solid var(--violet-line);border-radius:var(--radius);
  background:linear-gradient(140deg,rgba(122,59,255,.30),rgba(7,7,12,.2));
  color:var(--cyan);font:700 12px/1 var(--font-mono);letter-spacing:.08em;
}
.brand__mark::after{
  content:"";position:absolute;right:-1px;bottom:-1px;width:8px;height:8px;
  border-right:1px solid var(--cyan);border-bottom:1px solid var(--cyan);
}
.brand__text{display:flex;flex-direction:column;gap:2px;min-width:0}
.brand__name{font:800 15px/1.3 var(--font-display);letter-spacing:.02em;color:var(--read);white-space:nowrap}
.brand__tagline{font:500 10.5px/1.4 var(--font-mono);letter-spacing:.14em;text-transform:uppercase;color:var(--read-45);white-space:nowrap}

.site-nav{justify-self:end}
.nav-list{display:flex;align-items:center;gap:2px;flex-wrap:wrap}
.nav-list__item{display:block}
.nav-link{
  position:relative;display:inline-block;
  padding:9px 12px 10px;border:1px solid transparent;border-radius:var(--radius);
  font-size:13.5px;font-weight:500;color:var(--read-70);
  transition:color .16s ease,background-color .16s ease,border-color .16s ease;
}
.nav-link::after{
  content:"";position:absolute;left:12px;right:12px;bottom:5px;height:1px;
  background:var(--cyan);transform:scaleX(0);transform-origin:left center;
  transition:transform .16s ease;
}
.nav-link:hover{color:var(--read);background:rgba(255,255,255,.045)}
.nav-link:hover::after{transform:scaleX(1)}
.nav-link[aria-current="page"]{
  color:var(--read);border-color:var(--violet-line);
  background:linear-gradient(180deg,rgba(122,59,255,.30),rgba(122,59,255,.06));
}
.nav-link[aria-current="page"]::after{transform:scaleX(1)}

.nav-toggle{
  display:none;place-items:center;width:44px;height:40px;
  border:1px solid var(--grid);border-radius:var(--radius);background:var(--ink-2);
  transition:border-color .16s ease,background-color .16s ease;
}
.nav-toggle:hover{border-color:var(--cyan)}
.nav-toggle__bars{display:flex;flex-direction:column;gap:4px;width:18px}
.nav-toggle__bars i{display:block;height:1px;background:var(--read);transition:transform .18s ease,opacity .18s ease}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars i:nth-child(1){transform:translateY(5px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars i:nth-child(2){opacity:0}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars i:nth-child(3){transform:translateY(-5px) rotate(-45deg)}

/* ---------- 双轨索引条 ---------- */
.track-bar{
  background:var(--ink-2);border-bottom:1px solid var(--grid);
  overflow:hidden;max-height:52px;
  transition:max-height .22s ease,opacity .22s ease;
}
.site-header[data-compact] .track-bar{max-height:0;opacity:0}
.track-bar__inner{display:flex;align-items:center;gap:20px;min-height:46px}
.track-switch{display:flex;gap:4px;flex:none}
.track-tab{
  padding:6px 12px;border:1px solid var(--grid);border-radius:var(--radius);
  font:600 11px/1.4 var(--font-mono);letter-spacing:.12em;color:var(--read-45);
  transition:color .16s ease,background-color .16s ease,border-color .16s ease;
}
.track-tab:hover{color:var(--read);border-color:var(--cyan)}
.track-tab[aria-pressed="true"]{color:#04110F;background:var(--cyan);border-color:var(--cyan)}
.track-list{display:flex;align-items:center;gap:22px;flex-wrap:wrap;font-size:12.5px;letter-spacing:.06em;color:var(--read-70)}
.track-list__item{display:flex;align-items:baseline;gap:6px;white-space:nowrap}
.track-list__num{font:600 10px/1 var(--font-mono);letter-spacing:.08em;color:var(--gold)}
.track-bar__meta{
  margin-left:auto;flex:none;
  font:500 11px/1.4 var(--font-mono);letter-spacing:.1em;color:var(--read-45);white-space:nowrap;
}
.scroll-rail{position:absolute;left:0;right:0;bottom:-1px;height:2px;background:transparent;pointer-events:none}
.scroll-rail__fill{
  display:block;height:100%;width:100%;transform:scaleX(0);transform-origin:left center;
  background:linear-gradient(90deg,var(--violet),var(--cyan) 72%,var(--gold));
}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:11px 18px;border:1px solid var(--grid);border-radius:var(--radius);
  background:var(--panel);color:var(--read);
  font:600 13px/1 var(--font-body);letter-spacing:.06em;
  transition:border-color .16s ease,background-color .16s ease,color .16s ease,transform .16s ease,box-shadow .16s ease;
}
.btn:hover{border-color:var(--cyan);transform:translateY(-2px);box-shadow:0 0 0 1px rgba(25,227,209,.35)}
.btn--primary{
  border-color:var(--violet-line);color:#fff;
  background:linear-gradient(135deg,var(--violet),#5420C9);
}
.btn--primary:hover{
  border-color:var(--cyan);
  box-shadow:0 0 24px -8px rgba(122,59,255,.95),0 0 0 1px rgba(25,227,209,.45);
}
.btn--ghost{background:transparent;color:var(--read-70)}
.btn--quiet{padding-inline:0;background:transparent;border-color:transparent;color:var(--cyan)}
.btn--quiet:hover{transform:none;box-shadow:none;color:var(--read);text-decoration:underline;text-underline-offset:4px}

/* ---------- 章节与栅格 ---------- */
.section{padding-block:clamp(48px,8vw,96px)}
.section--ink{background:var(--ink)}
.section--panel{background:var(--ink-2);border-block:1px solid var(--grid)}
.section--paper{background:var(--paper);color:var(--paper-ink)}
.section__head{
  display:grid;grid-template-columns:minmax(0,auto) minmax(0,1fr);
  gap:clamp(14px,4vw,56px);align-items:end;
  margin-bottom:clamp(24px,4vw,48px);
}
.section__index{font:600 12px/1.4 var(--font-mono);letter-spacing:.16em;text-transform:uppercase;color:var(--cyan)}
.section__title{
  font-family:var(--font-display);font-weight:800;
  font-size:clamp(28px,4.6vw,54px);line-height:1.06;letter-spacing:-.02em;
  text-transform:uppercase;color:var(--read);
}
.section__lead{max-width:64ch;margin-top:12px;font-size:15.5px;color:var(--read-70)}
.section--paper .section__index{color:#5B2BC9}
.section--paper .section__title{color:var(--paper-ink)}
.section--paper .section__lead{color:rgba(26,26,34,.78)}

.grid{display:grid;gap:var(--gap)}
.grid--2{grid-template-columns:repeat(2,minmax(0,1fr))}
.grid--3{grid-template-columns:repeat(3,minmax(0,1fr))}
.grid--aside{grid-template-columns:minmax(220px,1fr) minmax(0,2.2fr);gap:clamp(24px,5vw,64px)}

/* ---------- 面板 ---------- */
.panel{
  position:relative;background:var(--panel);border:1px solid var(--grid);
  border-radius:var(--radius);padding:24px;
  transition:transform .16s ease,border-color .16s ease,box-shadow .16s ease;
}
.panel::before{
  content:"";position:absolute;top:-1px;left:-1px;width:10px;height:10px;
  border-top:1px solid var(--cyan);border-left:1px solid var(--cyan);
}
.panel:hover{
  transform:translateY(-2px);border-color:var(--violet-line);
  box-shadow:0 0 0 1px rgba(122,59,255,.32),0 20px 44px -32px rgba(122,59,255,.95);
}
.panel__head{
  display:flex;align-items:baseline;justify-content:space-between;gap:16px;
  padding-bottom:12px;margin-bottom:16px;border-bottom:1px solid var(--grid-soft);
}
.panel__index{font:600 11px/1.4 var(--font-mono);letter-spacing:.14em;color:var(--gold)}
.panel__title{font-family:var(--font-display);font-weight:800;font-size:19px;letter-spacing:.01em;color:var(--read)}
.panel__body{font-size:14.5px;color:var(--read-70)}
.panel--paper{background:var(--paper);border-color:rgba(26,26,34,.18);color:var(--paper-ink)}
.panel--paper .panel__title{color:var(--paper-ink)}
.panel--paper .panel__body{color:rgba(26,26,34,.78)}
.panel--paper .panel__head{border-bottom-color:rgba(26,26,34,.18)}

/* ---------- 正文与数据件 ---------- */
.prose{max-width:68ch;font-size:15.5px;line-height:1.75;color:var(--read-70)}
.prose p+p{margin-top:1em}
.prose strong{color:var(--read);font-weight:700}
.prose a{color:var(--cyan);border-bottom:1px solid rgba(25,227,209,.4)}
.section--paper .prose,.panel--paper .prose{color:rgba(26,26,34,.8)}
.section--paper .prose strong,.panel--paper .prose strong{color:var(--paper-ink)}

.stat{display:flex;flex-direction:column;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(--gold)}
.stat__label{font:600 11px/1.5 var(--font-mono);letter-spacing:.14em;text-transform:uppercase;color:var(--read-45)}

.chip-row{display:flex;flex-wrap:wrap;gap:8px}
.chip{
  display:inline-flex;align-items:center;gap:8px;
  padding:7px 12px;border:1px solid var(--grid);border-radius:var(--radius);
  background:var(--ink-2);color:var(--read-70);
  font-size:12.5px;letter-spacing:.04em;
  transition:color .16s ease,border-color .16s ease,background-color .16s ease;
}
.chip:hover{border-color:var(--cyan);color:var(--read)}
.chip[aria-pressed="true"]{border-color:var(--cyan);background:var(--cyan-soft);color:var(--cyan)}

.tag{
  display:inline-block;padding:3px 8px;border:1px solid var(--grid);
  font:600 10.5px/1.7 var(--font-mono);letter-spacing:.12em;text-transform:uppercase;color:var(--read-45);
}
.tag--gold{color:var(--gold);border-color:rgba(255,166,43,.5)}
.tag--violet{color:#B79BFF;border-color:rgba(122,59,255,.6)}
.tag--red{color:var(--red);border-color:rgba(255,59,92,.5)}

/* ---------- 面包屑 ---------- */
.breadcrumbs{padding-block:14px;font:500 11px/1.6 var(--font-mono);letter-spacing:.12em;text-transform:uppercase;color:var(--read-45)}
.breadcrumbs__list{display:flex;flex-wrap:wrap;align-items:center;gap:10px}
.breadcrumbs__item{display:flex;align-items:center;gap:10px}
.breadcrumbs__item::after{content:"/";color:var(--grid)}
.breadcrumbs__item:last-child::after{content:""}
.breadcrumbs a:hover{color:var(--cyan)}
.breadcrumbs [aria-current="page"]{color:var(--read)}

/* ---------- 图片容器 ---------- */
.media-frame{
  position:relative;overflow:hidden;border:1px solid var(--grid);border-radius:var(--radius);
  background:linear-gradient(150deg,var(--panel),#0A0A12);
  aspect-ratio:16/9;
}
.media-frame img{width:100%;height:100%;object-fit:cover}
.media-frame::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background:linear-gradient(180deg,transparent 52%,rgba(7,7,12,.62));
}
.media-frame--wide{aspect-ratio:21/9}
.media-frame--square{aspect-ratio:1/1}
.media-frame--tall{aspect-ratio:3/4}
.media-frame__label{
  position:absolute;left:10px;bottom:10px;z-index:2;
  padding:5px 9px;border:1px solid var(--grid);background:rgba(7,7,12,.8);
  font:500 11px/1.4 var(--font-mono);letter-spacing:.12em;text-transform:uppercase;color:var(--cyan);
}

/* ---------- 页脚 ---------- */
.site-footer{
  position:relative;background:#050509;border-top:1px solid var(--grid);
  padding:clamp(44px,6vw,76px) 0 26px;
  font-size:14px;color:var(--read-70);
}
.site-footer::before{
  content:"";position:absolute;top:0;left:0;right:0;height:2px;
  background:linear-gradient(90deg,var(--violet),var(--cyan) 44%,var(--gold) 78%,transparent);
}
.site-footer::after{
  content:"";position:absolute;inset:0;pointer-events:none;opacity:.55;
  background-image:linear-gradient(90deg,rgba(58,63,75,.28) 1px,transparent 1px);
  background-size:96px 100%;
}
.site-footer .shell{position:relative;z-index:1}
.footer-grid{
  display:grid;grid-template-columns:1.5fr 1fr 1fr 1.3fr;
  gap:clamp(24px,4vw,48px);padding-bottom:clamp(28px,4vw,44px);
}
.footer-brand__mark{
  display:inline-grid;place-items:center;width:40px;height:40px;
  border:1px solid var(--violet-line);border-radius:var(--radius);
  background:linear-gradient(140deg,rgba(122,59,255,.26),transparent);
  color:var(--cyan);font:700 12px/1 var(--font-mono);letter-spacing:.08em;
}
.footer-brand__name{margin-top:14px;font:800 17px/1.4 var(--font-display);letter-spacing:.02em;color:var(--read)}
.footer-brand__tagline{margin-top:6px;font:500 11px/1.6 var(--font-mono);letter-spacing:.14em;text-transform:uppercase;color:var(--cyan)}
.footer-brand__desc{margin-top:14px;max-width:38ch;font-size:13.5px;line-height:1.8;color:var(--read-45)}
.footer-col__title{margin-bottom:14px;font:600 11px/1.4 var(--font-mono);letter-spacing:.16em;text-transform:uppercase;color:var(--read-45)}
.footer-links{display:flex;flex-direction:column;gap:9px}
.footer-links a{
  position:relative;display:inline-block;padding-left:15px;
  font-size:13.5px;color:var(--read-70);
  transition:color .16s ease,transform .16s ease;
}
.footer-links a::before{
  content:"";position:absolute;left:0;top:.7em;width:6px;height:1px;background:var(--grid);
  transition:background-color .16s ease,width .16s ease;
}
.footer-links a:hover{color:var(--read);transform:translateX(2px)}
.footer-links a:hover::before{background:var(--cyan);width:10px}
.footer-contact{display:flex;flex-direction:column;gap:12px}
.footer-contact__row{display:flex;flex-direction:column;gap:3px}
.footer-contact__value{font-family:var(--font-mono);font-size:12.5px;line-height:1.7;letter-spacing:.01em;color:var(--read);word-break:break-word}
.footer-note{
  margin-top:16px;padding-top:14px;border-top:1px solid var(--grid-soft);
  font-size:12.5px;line-height:1.75;color:var(--read-45);
}
.footer-meta{
  display:flex;flex-wrap:wrap;gap:8px 28px;
  padding-top:20px;border-top:1px solid var(--grid);
  font:500 11.5px/1.7 var(--font-mono);letter-spacing:.06em;color:var(--read-45);
}
.footer-meta__item{display:inline-block}

/* ---------- 滚动显现 ---------- */
body.js-ready [data-reveal]{opacity:0;transform:translateY(12px);transition:opacity .5s ease,transform .5s ease}
body.js-ready [data-reveal].is-in{opacity:1;transform:none}

/* ---------- 平板 ---------- */
@media (max-width:1100px){
  .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media (max-width:960px){
  .site-header__inner{grid-template-columns:auto 1fr auto;gap:14px;min-height:62px}
  .nav-toggle{display:grid;justify-self:end}
  .site-header__cta{justify-self:end}
  .site-nav{
    position:absolute;top:100%;left:0;right:0;display:none;
    background:var(--ink-2);border-bottom:1px solid var(--grid);
    box-shadow:0 28px 54px -30px rgba(0,0,0,.95);
    max-height:calc(100vh - 96px);overflow:auto;
  }
  .site-nav[data-open]{display:block}
  .nav-list{flex-direction:column;align-items:stretch;gap:0;padding:6px clamp(16px,4vw,24px) 14px}
  .nav-list__item{border-bottom:1px solid var(--grid-soft)}
  .nav-list__item:last-child{border-bottom:0}
  .nav-link{display:flex;width:100%;padding:15px 2px;font-size:15px;background:none;border:0}
  .nav-link::after{display:none}
  .nav-link:hover{background:none;color:var(--cyan)}
  .nav-link[aria-current="page"]{color:var(--cyan);background:none;border:0}
  .track-bar__meta{display:none}
  .track-bar__inner{overflow-x:auto;gap:14px;scrollbar-width:none}
  .track-bar__inner::-webkit-scrollbar{display:none}
  .grid--3{grid-template-columns:repeat(2,minmax(0,1fr))}
  .grid--aside{grid-template-columns:1fr}
  .section__head{grid-template-columns:1fr;align-items:start}
}
/* ---------- 手机 ---------- */
@media (max-width:640px){
  .refresh-bar{gap:10px;font-size:10.5px;letter-spacing:.08em}
  .refresh-bar__meter{display:none}
  .refresh-bar__clock{margin-left:auto}
  .brand__tagline{display:none}
  .brand__name{font-size:13.5px}
  .site-header__cta{display:none}
  .grid--2,.grid--3{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr}
  .panel{padding:20px}
  .section__title{font-size:clamp(26px,8vw,36px)}
}
/* ---------- 动效降级 ---------- */
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
  }
  body.js-ready [data-reveal]{opacity:1;transform:none}
  .refresh-bar__pulse{animation:none;box-shadow:0 0 0 0 rgba(25,227,209,.45)}
}