/* ===== 1. Reset ===== */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
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,picture,video{display:block;max-width:100%}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
a{color:inherit;text-decoration:none}
table{border-collapse:collapse;width:100%}
summary{list-style:none;cursor:pointer}
summary::-webkit-details-marker{display:none}

/* ===== 2. 变量 ===== */
:root{
  --ink:#070A14;
  --ink-2:#0E1330;
  --panel:#171B3A;
  --paper:#F3E9D2;
  --violet:#B45CFF;
  --gold:#E8B04B;
  --orange:#FF6A3D;
  --sea:#1D4E89;
  --mint:#3DD6B5;
  --mute:#A6ABC4;
  --line:#3A3F63;

  --rail-w:96px;
  --topbar-h:64px;
  --wrap:1240px;

  --shadow-hard:8px 8px 0 0 rgba(7,10,20,.9);
  --shadow-violet:8px 8px 0 0 rgba(180,92,255,.42);
  --shadow-gold:8px 8px 0 0 rgba(232,176,75,.55);

  --font-head:"Noto Sans SC","Source Han Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  --font-body:"Noto Sans SC","Source Han Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  --font-mono:"JetBrains Mono","IBM Plex Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,"Courier New",monospace;

  --ease:cubic-bezier(.2,.7,.3,1);
}

/* ===== 3. 基础排版 ===== */
body{
  min-height:100vh;
  overflow-x:hidden;
  background-color:var(--ink);
  background-image:
    radial-gradient(900px 520px at 78% -10%, rgba(180,92,255,.17), transparent 62%),
    radial-gradient(680px 420px at 2% 104%, rgba(232,176,75,.10), transparent 60%),
    repeating-linear-gradient(90deg, rgba(58,63,99,.14) 0 1px, transparent 1px 96px);
  background-attachment:fixed;
  color:var(--paper);
  font-family:var(--font-body);
  font-size:17px;
  font-weight:400;
  line-height:1.75;
  letter-spacing:.01em;
}
h1,h2,h3,h4,h5,h6{
  font-family:var(--font-head);
  font-weight:900;
  line-height:1.14;
  letter-spacing:-.02em;
  color:var(--paper);
}
h1{font-size:clamp(2rem,4vw,3rem)}
h2{font-size:clamp(1.8rem,3.2vw,3rem)}
h3{font-size:clamp(1.25rem,2vw,1.6rem);letter-spacing:-.01em}
h4{font-size:1.05rem;letter-spacing:0}
p{max-width:68ch}
::selection{background:var(--violet);color:#0A0A12}
:where(a,button,summary,[tabindex]):focus-visible{
  outline:3px solid var(--mint);
  outline-offset:3px;
  border-radius:2px;
}

.mono{font-family:var(--font-mono);font-variant-ligatures:none}
.display{
  font-family:var(--font-head);
  font-weight:900;
  font-size:clamp(3.2rem,7vw,7rem);
  line-height:.94;
  letter-spacing:-.03em;
  transform:skewX(-2deg);
  transform-origin:left bottom;
  color:var(--paper);
  text-wrap:balance;
}
.eyebrow{
  display:inline-flex;align-items:center;gap:10px;
  font-family:var(--font-mono);font-size:11.5px;letter-spacing:.24em;
  text-transform:uppercase;color:var(--gold);
}
.eyebrow::before{content:"";width:26px;height:2px;background:var(--violet)}
.lead{font-size:clamp(1.02rem,1.5vw,1.18rem);line-height:1.7;color:#DAD3BF}
.prose p+p{margin-top:1.05em}
.prose{max-width:72ch}
.prose strong{color:var(--gold);font-weight:800}

/* ===== 4. 布局工具 ===== */
.wrap{width:100%;max-width:var(--wrap);margin-inline:auto;padding-inline:clamp(18px,4vw,48px)}
.section{padding-block:clamp(44px,7vw,96px)}
.stack>*+*{margin-top:18px}
.stack-lg>*+*{margin-top:clamp(22px,3vw,36px)}
.grid{display:grid;gap:clamp(18px,2.6vw,32px)}
.grid--2{grid-template-columns:repeat(2,minmax(0,1fr))}
.grid--3{grid-template-columns:repeat(3,minmax(0,1fr))}
.grid--7-5{grid-template-columns:7fr 5fr}
.grid--8-4{grid-template-columns:8fr 4fr}
.grid--5-7{grid-template-columns:5fr 7fr}
.grid--stagger{align-items:start}
.grid--stagger>.grid__shift{margin-top:clamp(20px,4vw,56px)}
.rule{height:2px;border:0;background:linear-gradient(90deg,var(--violet),var(--line) 40%,transparent);margin-block:clamp(24px,4vw,44px)}

/* ===== 5. 面板与筹码卡 ===== */
.panel{
  position:relative;
  background:var(--panel);
  border:2px solid var(--line);
  box-shadow:var(--shadow-hard);
  padding:clamp(20px,3vw,36px);
}
.panel--ink{background:var(--ink-2)}
.panel--paper{background:var(--paper);color:#14162C;border-color:#14162C;box-shadow:var(--shadow-violet)}
.panel--paper h1,.panel--paper h2,.panel--paper h3,.panel--paper h4{color:#101226}
.panel--paper .prose strong{color:#7A3BB5}
.panel--accent{border-color:var(--violet);box-shadow:var(--shadow-violet)}
.panel__num{
  position:absolute;top:-15px;left:20px;
  padding:2px 10px;
  background:var(--ink);color:var(--gold);
  border:2px solid var(--line);
  font-family:var(--font-mono);font-size:12px;letter-spacing:.2em;line-height:1.6;
}
.panel--paper .panel__num{background:#101226;color:var(--gold);border-color:#101226}

/* ===== 6. 按钮 ===== */
.btn{
  display:inline-flex;align-items:center;gap:9px;
  padding:12px 22px;
  background:var(--ink);color:var(--paper);
  border:2px solid var(--line);
  box-shadow:4px 4px 0 0 var(--line);
  font-family:var(--font-head);font-weight:900;font-size:15px;letter-spacing:.02em;
  transition:transform .18s var(--ease),box-shadow .18s var(--ease),background-color .18s,color .18s;
}
.btn:hover{transform:translate(-2px,-2px);box-shadow:6px 6px 0 0 var(--violet);border-color:var(--violet)}
.btn--primary{background:var(--orange);color:#140708;border-color:#140708;box-shadow:4px 4px 0 0 rgba(232,176,75,.85)}
.btn--primary:hover{box-shadow:6px 6px 0 0 var(--paper);border-color:#140708}
.btn--paper{background:var(--paper);color:var(--ink);border-color:var(--ink);box-shadow:4px 4px 0 0 var(--violet)}
.btn--ghost{background:transparent;color:var(--paper);border-color:var(--line);box-shadow:none}
.btn--ghost:hover{background:rgba(180,92,255,.14);border-color:var(--violet);box-shadow:none;transform:none}
.btn--sm{padding:8px 14px;font-size:13px}

/* ===== 7. 标签 / 统计 / 表格 / 折叠 ===== */
.chip{
  display:inline-flex;align-items:center;gap:7px;
  padding:7px 13px;
  border:2px solid var(--line);
  background:rgba(23,27,58,.72);
  color:var(--mute);
  font-family:var(--font-mono);font-size:12px;letter-spacing:.08em;
  transition:color .16s,border-color .16s,background-color .16s;
}
.chip:hover{color:var(--paper);border-color:var(--violet)}
.chip--on{background:var(--violet);border-color:var(--violet);color:#0B0716;font-weight:700}
.tag{
  display:inline-block;padding:2px 8px;
  background:var(--gold);color:#140F02;
  font-family:var(--font-mono);font-size:11px;letter-spacing:.1em;font-weight:700;
}
.tag--violet{background:var(--violet);color:#0B0716}
.tag--mint{background:var(--mint);color:#03211B}

.stat{display:flex;flex-direction:column;gap:2px}
.stat__num{
  font-family:var(--font-mono);font-weight:700;
  font-size:clamp(1.8rem,3.6vw,2.9rem);line-height:1;
  color:var(--gold);letter-spacing:-.02em;
}
.stat__label{font-family:var(--font-mono);font-size:11px;letter-spacing:.16em;color:var(--mute)}

.data-table{font-size:15px;margin-top:6px}
.data-table caption{
  text-align:left;padding-bottom:10px;
  font-family:var(--font-mono);font-size:11px;letter-spacing:.18em;color:var(--mute);
}
.data-table th,.data-table td{padding:10px 12px;text-align:left;vertical-align:top;border-bottom:1px solid var(--line)}
.data-table th{
  font-family:var(--font-mono);font-size:11px;font-weight:700;letter-spacing:.14em;
  text-transform:uppercase;color:var(--mute);background:rgba(14,19,48,.7);
}
.data-table td:first-child{color:#DAD3BF;font-weight:600}
.data-table tbody tr{transition:background-color .16s}
.data-table tbody tr:hover{background:rgba(180,92,255,.12)}
.data-table .is-key{font-family:var(--font-mono);color:var(--gold)}
.data-table--paper th{background:#E4D8BC;color:#3A2F18;border-bottom-color:#B8A681}
.data-table--paper td{border-bottom-color:#CDBE9C;color:#1A1B2E}

.fold{
  border:2px solid var(--line);
  background:rgba(23,27,58,.62);
  margin-bottom:12px;
}
.fold__head{
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:14px 16px;
  font-family:var(--font-head);font-weight:800;font-size:15.5px;
  color:var(--paper);
}
.fold__head::after{
  content:"+";
  font-family:var(--font-mono);font-size:16px;color:var(--gold);
  transition:transform .18s var(--ease);
}
.fold[open]>.fold__head{color:var(--gold);border-bottom:1px solid var(--line)}
.fold[open]>.fold__head::after{transform:rotate(45deg)}
.fold__body{padding:14px 16px 18px;color:var(--mute);font-size:15.5px;line-height:1.75}
.fold__body p+p{margin-top:.9em}

/* ===== 8. 图片容器 ===== */
.img-frame{
  position:relative;
  overflow:hidden;
  aspect-ratio:16/9;
  border:2px solid var(--line);
  box-shadow:var(--shadow-hard);
  background:
    linear-gradient(135deg,var(--ink-2) 0%,var(--panel) 52%,#2A1B4B 100%);
}
.img-frame>img,.img-frame>picture>img{
  width:100%;height:100%;object-fit:cover;
}
.img-frame__ph{
  position:absolute;inset:0;
  display:grid;place-items:center;
  padding:18px;text-align:center;
  font-family:var(--font-mono);font-size:11.5px;letter-spacing:.2em;
  color:var(--mute);
  background-image:
    repeating-linear-gradient(45deg, rgba(180,92,255,.13) 0 2px, transparent 2px 12px);
}
.img-frame__cap{
  position:absolute;left:0;right:0;bottom:0;
  padding:10px 14px;
  background:linear-gradient(180deg,transparent,rgba(7,10,20,.92));
  font-family:var(--font-mono);font-size:11px;letter-spacing:.12em;color:#D9D2BE;
}
.img-frame--tall{aspect-ratio:3/4}
.img-frame--wide{aspect-ratio:21/9}
.img-frame--square{aspect-ratio:1/1}
.img-frame--paper{border-color:#14162C;box-shadow:var(--shadow-gold)}

/* ===== 9. 目录 / 面包屑 ===== */
.toc{
  position:sticky;top:calc(var(--topbar-h) + 18px);
  border-left:2px solid var(--line);
  padding-left:2px;
}
.toc__title{
  font-family:var(--font-mono);font-size:11px;letter-spacing:.2em;
  color:var(--mute);padding:0 12px 10px;
}
.toc__link{
  display:block;padding:8px 12px;
  border-left:2px solid transparent;margin-left:-4px;
  font-size:14px;line-height:1.5;color:var(--mute);
  transition:color .16s,border-color .16s,background-color .16s;
}
.toc__link:hover{color:var(--paper);background:rgba(180,92,255,.1)}
.toc__link.is-active,.toc__link[aria-current="true"]{
  color:var(--paper);border-left-color:var(--violet);background:rgba(180,92,255,.14);
}
.breadcrumb{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px;
  font-family:var(--font-mono);font-size:11.5px;letter-spacing:.12em;color:var(--mute);
}
.breadcrumb a{color:var(--mute);border-bottom:1px solid transparent}
.breadcrumb a:hover{color:var(--gold);border-bottom-color:var(--gold)}
.breadcrumb__sep{color:var(--line)}

/* ===== 10. 入场动效 ===== */
.reveal{
  opacity:0;transform:translateY(12px);
  transition:opacity .26s var(--ease),transform .26s var(--ease);
}
.reveal.is-in{opacity:1;transform:none}

/* ===== 11. Skip link ===== */
.skip-link{
  position:fixed;top:10px;left:10px;z-index:200;
  padding:10px 18px;
  background:var(--paper);color:var(--ink);
  border:2px solid var(--ink);
  font-family:var(--font-head);font-weight:900;font-size:14px;
  transform:translateY(-180%);
  transition:transform .18s var(--ease);
}
.skip-link:focus-visible{transform:translateY(0)}

/* ===== 12. 阅读进度 ===== */
.progress{
  position:fixed;top:0;left:0;right:0;height:3px;z-index:110;
  background:rgba(58,63,99,.32);
  pointer-events:none;
}
.progress__bar{
  display:block;height:100%;width:0;
  background:linear-gradient(90deg,var(--violet),var(--gold) 70%,var(--orange));
  box-shadow:0 0 14px rgba(180,92,255,.75);
  transition:width .08s linear;
}

/* ===== 13. 头部：桌面竖向导航轨 ===== */
.site-header{position:relative;z-index:80}
.rail{
  position:fixed;top:0;left:0;bottom:0;
  width:var(--rail-w);
  display:flex;flex-direction:column;gap:16px;
  padding:22px 8px 18px;
  border-right:1px solid rgba(58,63,99,.55);
  background:linear-gradient(180deg,rgba(7,10,20,.52) 0%,rgba(7,10,20,.86) 100%);
  backdrop-filter:blur(3px);
  transition:background-color .22s var(--ease),border-color .22s var(--ease),box-shadow .22s var(--ease);
}
.site-header[data-scrolled] .rail{
  background:var(--ink-2);
  border-right-color:var(--line);
  box-shadow:5px 0 0 0 rgba(23,27,58,.92);
}
.rail__brand{display:flex;flex-direction:column;align-items:center;gap:7px}
.rail__mark{
  display:grid;place-items:center;
  width:46px;height:46px;
  background:var(--paper);color:var(--ink);
  border:2px solid var(--ink);
  box-shadow:3px 3px 0 0 var(--violet);
  font-family:var(--font-head);font-weight:900;font-size:22px;line-height:1;
  transition:box-shadow .18s var(--ease),transform .18s var(--ease);
}
.rail__brand:hover .rail__mark{transform:translate(-1px,-1px);box-shadow:4px 4px 0 0 var(--orange)}
.rail__sub{
  font-family:var(--font-mono);font-size:9px;letter-spacing:.2em;color:var(--mute);
}
.rail__nav{flex:1;min-height:0;overflow-y:auto;scrollbar-width:thin}
.rail__meta{
  display:flex;flex-direction:column;align-items:center;gap:6px;
  padding-top:10px;border-top:1px solid rgba(58,63,99,.5);
}
.rail__dot{width:7px;height:7px;background:var(--mint);box-shadow:0 0 8px var(--mint);border-radius:50%}
.rail__status{
  font-family:var(--font-mono);font-size:9px;letter-spacing:.06em;
  color:var(--mute);text-align:center;line-height:1.5;
}

.nav__kicker{display:none}
.nav__list>li+li{margin-top:2px}
.nav__link{
  display:block;
  padding:9px 6px 10px;
  border:1px solid transparent;
  border-left:2px solid rgba(58,63,99,.6);
  transition:background-color .18s var(--ease),border-color .18s var(--ease),transform .18s var(--ease);
}
.nav__num{
  display:block;
  font-family:var(--font-mono);font-size:10px;letter-spacing:.14em;
  color:var(--mute);transition:color .18s;
}
.nav__label{
  display:block;margin-top:3px;
  font-family:var(--font-head);font-weight:800;font-size:12.5px;line-height:1.36;
  letter-spacing:.01em;color:#DCD6C4;
  transition:color .18s;
}
.nav__link:hover{background:rgba(180,92,255,.16);border-left-color:var(--violet);transform:translateX(2px)}
.nav__link:hover .nav__num{color:var(--gold)}
.nav__link:hover .nav__label{color:#fff}
.nav__link[aria-current="page"]{
  background:var(--paper);border-left-color:var(--gold);transform:none;
  box-shadow:3px 3px 0 0 rgba(180,92,255,.5);
}
.nav__link[aria-current="page"] .nav__label{color:var(--ink)}
.nav__link[aria-current="page"] .nav__num{color:#8A6A1F}
.nav__foot{display:none}
.nav__cta{
  display:block;padding:11px 14px;
  background:var(--paper);color:var(--ink);
  border:2px solid var(--ink);box-shadow:4px 4px 0 0 var(--violet);
  font-family:var(--font-head);font-weight:900;font-size:15px;text-align:center;
}

.topbar{display:none}

.dossier{
  position:fixed;right:22px;bottom:24px;z-index:85;
  display:inline-flex;align-items:center;gap:8px;
  padding:12px 16px;
  background:var(--paper);color:var(--ink);
  border:2px solid var(--ink);
  box-shadow:5px 5px 0 0 var(--violet);
  font-family:var(--font-head);font-weight:900;font-size:14px;letter-spacing:.02em;
  transition:transform .18s var(--ease),box-shadow .18s var(--ease);
}
.dossier:hover{transform:translate(-2px,-2px);box-shadow:7px 7px 0 0 var(--orange)}
.dossier__tag{
  padding:2px 5px;
  background:var(--ink);color:var(--gold);
  font-family:var(--font-mono);font-size:10px;letter-spacing:.08em;
}

/* ===== 14. 页脚 ===== */
.site-footer{
  position:relative;
  margin-top:clamp(48px,8vw,110px);
  background:var(--ink-2);
  border-top:2px solid var(--line);
  box-shadow:0 -8px 0 0 rgba(23,27,58,.55);
  color:var(--paper);
}
.footer__stripe{
  height:4px;
  background:linear-gradient(90deg,var(--violet),var(--gold) 46%,var(--orange));
}
.footer__inner{
  max-width:var(--wrap);margin-inline:auto;
  padding:clamp(34px,5vw,64px) clamp(18px,4vw,48px) 26px;
  display:grid;gap:clamp(24px,3.4vw,52px);
  grid-template-columns:1.6fr .85fr 1.35fr;
  align-items:start;
}
.footer__mark{
  font-family:var(--font-head);font-weight:900;
  font-size:clamp(1.6rem,3vw,2.4rem);line-height:1.1;letter-spacing:-.03em;
}
.footer__desc{margin-top:12px;font-size:15px;line-height:1.7;color:#C8C2AE;max-width:38ch}
.footer__mono{
  margin-top:16px;
  font-family:var(--font-mono);font-size:10.5px;letter-spacing:.24em;color:var(--mute);
}
.footer__head{
  font-family:var(--font-mono);font-size:11px;font-weight:700;letter-spacing:.2em;
  text-transform:uppercase;color:var(--gold);
  padding-bottom:12px;margin-bottom:12px;
  border-bottom:1px solid var(--line);
}
.footer__list>li+li{margin-top:9px}
.footer__link{
  display:inline-block;
  font-size:14.5px;color:#D7D0BC;
  border-bottom:1px solid transparent;
  transition:color .16s,border-color .16s;
}
.footer__link:hover{color:var(--gold);border-bottom-color:var(--gold)}
.footer__row{
  display:flex;flex-wrap:wrap;align-items:center;gap:6px 10px;
  font-size:14px;color:#D7D0BC;
}
.footer__row--block{display:block}
.footer__k{
  font-family:var(--font-mono);font-size:10.5px;letter-spacing:.14em;
  color:var(--mute);
}
.footer__val{
  font-family:var(--font-mono);font-size:13px;letter-spacing:.01em;
  color:var(--paper);word-break:break-all;
}
.copy{
  padding:3px 8px;
  border:1px solid var(--line);
  color:var(--mute);
  font-family:var(--font-mono);font-size:10.5px;letter-spacing:.1em;
  transition:color .16s,border-color .16s,background-color .16s;
}
.copy:hover{color:var(--ink);background:var(--mint);border-color:var(--mint)}
.copy.is-done{color:var(--ink);background:var(--mint);border-color:var(--mint)}
.footer__hint{margin-top:16px;font-size:12.5px;line-height:1.7;color:var(--mute);max-width:34ch}
.footer__base{
  max-width:var(--wrap);margin-inline:auto;
  padding:18px clamp(18px,4vw,48px) 34px;
  border-top:1px solid var(--line);
  display:flex;flex-wrap:wrap;align-items:center;gap:8px 26px;
  font-family:var(--font-mono);font-size:11.5px;letter-spacing:.06em;color:var(--mute);
}
.footer__icp{color:#8E93AD}
.footer__note{color:#8E93AD}

/* ===== 15. 响应式 ===== */
@media (min-width:901px){
  body{padding-left:var(--rail-w)}
  .progress{left:var(--rail-w)}
}
@media (max-width:1100px){
  .footer__inner{grid-template-columns:1.4fr .9fr 1.3fr}
}
@media (max-width:900px){
  body{font-size:16.5px}

  .rail{
    position:static;width:auto;
    display:block;
    padding:0;border:0;background:none;box-shadow:none;backdrop-filter:none;
  }
  .rail__brand,.rail__meta{display:none}

  .rail__nav{
    position:fixed;top:0;left:0;right:0;z-index:85;
    padding:calc(var(--topbar-h) + 18px) 20px 28px;
    max-height:100vh;overflow-y:auto;
    background:linear-gradient(180deg,var(--ink-2) 0%,var(--ink) 78%);
    border-bottom:2px solid var(--violet);
    box-shadow:0 20px 60px rgba(0,0,0,.7);
    transform:translateY(-104%);
    opacity:0;visibility:hidden;
    transition:transform .24s var(--ease),opacity .2s var(--ease),visibility .2s;
  }
  .site-header[data-open] .rail__nav{transform:translateY(0);opacity:1;visibility:visible}

  .nav__kicker{
    display:block;margin-bottom:14px;
    font-family:var(--font-mono);font-size:10.5px;letter-spacing:.24em;
    color:var(--gold);text-transform:uppercase;
  }
  .nav__list>li+li{margin-top:0}
  .nav__link{
    display:flex;align-items:baseline;gap:14px;
    padding:15px 2px;
    border:0;border-bottom:1px solid var(--line);
    border-left:0;background:none;
  }
  .nav__link:hover{transform:none;background:rgba(180,92,255,.12)}
  .nav__link[aria-current="page"]{background:rgba(243,233,210,.96);box-shadow:none;padding-left:12px;padding-right:12px}
  .nav__num{font-size:11px;color:var(--gold)}
  .nav__label{margin-top:0;font-size:23px;line-height:1.25}
  .nav__foot{display:block;margin-top:22px}
  .nav__cta{font-size:16px;padding:14px}

  .topbar{
    display:flex;align-items:center;justify-content:space-between;gap:12px;
    position:fixed;top:0;left:0;right:0;height:var(--topbar-h);z-index:90;
    padding:0 16px;
    background:linear-gradient(180deg,rgba(7,10,20,.95) 34%,rgba(7,10,20,.62) 100%);
    border-bottom:1px solid rgba(58,63,99,.5);
    transition:background-color .2s var(--ease);
  }
  .site-header[data-scrolled] .topbar{
    background:var(--ink-2);border-bottom-color:var(--line);
  }
  .topbar__brand{
    display:inline-flex;align-items:center;gap:10px;
    font-family:var(--font-head);font-weight:900;font-size:16px;letter-spacing:-.01em;
  }
  .topbar__mark{
    display:grid;place-items:center;width:30px;height:30px;
    background:var(--paper);color:var(--ink);
    border:2px solid var(--ink);box-shadow:2px 2px 0 0 var(--violet);
    font-size:15px;line-height:1;
  }
  .nav-toggle{
    display:inline-flex;align-items:center;gap:9px;
    padding:8px 12px;
    border:2px solid var(--line);background:rgba(23,27,58,.8);
    color:var(--paper);
    font-family:var(--font-mono);font-size:11px;letter-spacing:.14em;
  }
  .nav-toggle__bars{display:grid;gap:4px;width:18px}
  .nav-toggle__bars i{
    display:block;height:2px;width:100%;background:var(--paper);
    transition:transform .18s var(--ease),opacity .18s var(--ease);
  }
  .site-header[data-open] .nav-toggle{border-color:var(--violet);color:var(--gold)}
  .site-header[data-open] .nav-toggle__bars i{background:var(--gold)}
  .site-header[data-open] .nav-toggle__bars i:nth-child(1){transform:translateY(6px) rotate(45deg)}
  .site-header[data-open] .nav-toggle__bars i:nth-child(2){opacity:0}
  .site-header[data-open] .nav-toggle__bars i:nth-child(3){transform:translateY(-6px) rotate(-45deg)}

  .dossier{display:none}

  .grid--2,.grid--3,.grid--7-5,.grid--8-4,.grid--5-7{grid-template-columns:1fr}
  .grid--stagger>.grid__shift{margin-top:0}

  .footer__inner{grid-template-columns:1fr;gap:30px}
  .footer__desc,.footer__hint{max-width:none}
  .toc{position:static;border-left:0;padding-left:0;border-top:2px solid var(--line);padding-top:12px}
  .toc__link{border-left:0;padding-left:0;margin-left:0}
  .toc__link.is-active,.toc__link[aria-current="true"]{background:none;color:var(--gold)}
  .display{transform:none}
  .panel{box-shadow:5px 5px 0 0 rgba(7,10,20,.9)}
  .panel--paper{box-shadow:5px 5px 0 0 rgba(180,92,255,.45)}
  .img-frame{box-shadow:5px 5px 0 0 rgba(7,10,20,.9)}
}
@media (max-width:560px){
  body{font-size:16px;line-height:1.72}
  .display{font-size:clamp(2.4rem,11vw,3.4rem)}
  .panel{padding:20px 16px}
  .nav__label{font-size:21px}
  .btn{width:100%;justify-content:center}
  .footer__base{flex-direction:column;align-items:flex-start;gap:6px}
}
body.is-nav-open{overflow:hidden}

/* ===== 16. 无障碍动效降级 ===== */
@media (prefers-reduced-motion: reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
  }
  .display{transform:none}
  .reveal{opacity:1;transform:none}
  .progress__bar{transition:none}
}