/* ============================================================
   半岛平台体育 · 共享样式表 /assets/site.css
   堆叠面板式布局 · 侧边轨道导航 · 深海蓝 × 信号橙 × 荧光青
   ============================================================ */

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

/* ---------- tokens ---------- */
:root{
  --bg:#04080F;
  --panel:#0A1A2B;
  --indigo:#122B47;
  --green:#0B3B38;
  --wine:#4A1526;
  --orange:#FF6A1F;
  --amber:#FFAE5C;
  --cyan:#29E7D4;
  --ink:#EAF1F7;
  --muted:#93A9BF;
  --line:#1E3A54;
  --rail:92px;
  --r-lg:24px;
  --r-md:16px;
  --r-pill:999px;
  --maxw:1240px;
  --ease:cubic-bezier(.22,1,.36,1);
  --font-display:"Barlow Condensed","Archivo Narrow","Oswald","PingFang SC","Noto Sans SC","Source Han Sans SC","Microsoft YaHei",sans-serif;
  --font-body:"Noto Sans SC","Source Han Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  --font-mono:"JetBrains Mono","IBM Plex Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,"Courier New",monospace;
}

/* ---------- base ---------- */
body{
  background:
    radial-gradient(120% 80% at 100% 0%,rgba(18,43,71,.55) 0%,rgba(4,8,15,0) 60%),
    radial-gradient(90% 60% at 0% 100%,rgba(11,59,56,.45) 0%,rgba(4,8,15,0) 55%),
    var(--bg);
  color:var(--ink);
  font-family:var(--font-body);
  font-size:17px;
  line-height:1.75;
  font-weight:400;
  min-height:100vh;
  padding-left:var(--rail);
  -webkit-tap-highlight-color:rgba(41,231,212,.2);
}

h1,h2,h3,h4{
  font-family:var(--font-display);
  font-weight:800;
  letter-spacing:-.02em;
  line-height:1.08;
  color:var(--ink);
}
h1{font-size:clamp(30px,4.4vw,68px)}
h2{font-size:clamp(24px,3vw,34px)}
h3{font-size:20px;font-weight:700}

p{max-width:74ch}

::selection{background:var(--orange);color:#100400}

:focus-visible{outline:2px solid var(--cyan);outline-offset:2px;border-radius:6px}

.num{font-family:var(--font-mono);font-variant-numeric:tabular-nums;font-feature-settings:"tnum" 1;letter-spacing:-.01em}

/* ---------- layout helpers ---------- */
.wrap{
  width:100%;
  max-width:var(--maxw);
  margin-inline:auto;
  padding-inline:clamp(16px,3vw,40px);
}
.section{position:relative;padding-block:clamp(28px,4.6vw,56px)}
.stack-sm{display:flex;flex-direction:column;gap:12px}
.panel-stack{display:flex;flex-direction:column;gap:24px}

.grid{display:grid;gap:24px}
.grid--7-5{grid-template-columns:7fr 5fr}
.grid--8-4{grid-template-columns:8fr 4fr}
.grid--5-7{grid-template-columns:5fr 7fr}
.sink{}
@media (min-width:961px){.sink{margin-top:32px}}
@media (max-width:960px){
  .grid--7-5,.grid--8-4,.grid--5-7{grid-template-columns:1fr}
  .sink{margin-top:0}
}

/* ---------- skip link ---------- */
.skip-link{
  position:fixed;
  top:10px;
  left:calc(var(--rail) + 10px);
  z-index:300;
  padding:10px 18px;
  border-radius:var(--r-pill);
  background:var(--cyan);
  color:#02110F;
  font-weight:700;
  font-size:14px;
  text-decoration:none;
  transform:translateY(-220%);
  transition:transform .25s var(--ease);
}
.skip-link:focus{transform:translateY(0)}

/* ---------- scroll progress ---------- */
.scroll-progress{
  position:fixed;
  top:0;
  left:var(--rail);
  right:0;
  height:3px;
  z-index:250;
  pointer-events:none;
  background:rgba(30,58,84,.55);
}
.scroll-progress-bar{
  display:block;
  height:100%;
  width:0;
  background:linear-gradient(90deg,var(--orange),var(--amber) 45%,var(--cyan));
  box-shadow:0 0 12px rgba(255,106,31,.5);
}

/* ---------- header strip ---------- */
.site-header{position:relative;z-index:60}
.header-strip{
  display:flex;
  flex-wrap:wrap;
  gap:6px 24px;
  align-items:center;
  justify-content:space-between;
  padding:9px clamp(16px,3vw,40px);
  border-bottom:1px solid var(--line);
  background:linear-gradient(90deg,rgba(74,21,38,.95) 0%,rgba(18,43,71,.6) 38%,rgba(4,8,15,.9) 100%);
  font-size:12.5px;
  letter-spacing:.08em;
  color:var(--muted);
}
.strip-item{margin:0;font-weight:600}
.strip-item--live{color:var(--cyan)}
.strip-dot{
  display:inline-block;
  width:7px;height:7px;
  margin-right:9px;
  border-radius:50%;
  background:var(--cyan);
  box-shadow:0 0 0 4px rgba(41,231,212,.16);
  animation:bd-pulse 2.4s var(--ease) infinite;
  vertical-align:middle;
}
@keyframes bd-pulse{0%,100%{opacity:1}50%{opacity:.3}}

/* ---------- header bar ---------- */
.header-bar{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:18px;
  padding:14px clamp(16px,3vw,40px);
  border-bottom:1px solid var(--line);
  background:rgba(4,8,15,.72);
}
.brand{
  display:inline-flex;
  align-items:center;
  gap:12px;
  min-width:0;
  text-decoration:none;
  color:var(--ink);
}
.brand-mark{
  flex:none;
  display:grid;
  place-items:center;
  width:40px;height:40px;
  border-radius:13px;
  background:linear-gradient(135deg,var(--orange),var(--amber));
  color:#150700;
  font-family:var(--font-display);
  font-weight:900;
  font-size:18px;
  line-height:1;
  box-shadow:0 8px 20px -12px rgba(255,106,31,.9);
}
.brand-text{display:flex;flex-direction:column;line-height:1.18;min-width:0}
.brand-name{font-family:var(--font-display);font-weight:800;font-size:21px;letter-spacing:-.01em}
.brand-sign{font-size:11px;letter-spacing:.18em;color:var(--muted)}
.header-actions{display:flex;align-items:center;gap:12px}
.header-hint{
  font-family:var(--font-mono);
  font-size:12.5px;
  letter-spacing:.08em;
  color:var(--cyan);
  padding:5px 12px;
  border-radius:var(--r-pill);
  border:1px solid rgba(41,231,212,.32);
  background:rgba(41,231,212,.07);
  white-space:nowrap;
}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  padding:11px 20px;
  border-radius:var(--r-pill);
  border:1px solid var(--line);
  background:transparent;
  color:var(--ink);
  font-family:var(--font-body);
  font-weight:600;
  font-size:15px;
  line-height:1.2;
  text-decoration:none;
  cursor:pointer;
  transition:transform .2s var(--ease),background .2s var(--ease),border-color .2s var(--ease),color .2s var(--ease);
}
.btn--primary{background:var(--orange);border-color:var(--orange);color:#160600;font-weight:700}
.btn--primary:hover{background:var(--amber);border-color:var(--amber);transform:translateY(-2px)}
.btn--ghost:hover{border-color:var(--orange);color:var(--amber);transform:translateY(-2px)}
.btn--cyan{border-color:rgba(41,231,212,.6);color:var(--cyan)}
.btn--cyan:hover{background:rgba(41,231,212,.14);transform:translateY(-2px)}

/* ---------- nav toggle ---------- */
.nav-toggle{
  display:none;
  align-items:center;
  gap:10px;
  padding:10px 16px;
  border-radius:var(--r-pill);
  border:1px solid var(--line);
  background:rgba(18,43,71,.6);
  color:var(--ink);
  font-size:14px;
  font-weight:600;
  cursor:pointer;
  transition:border-color .2s var(--ease),background .2s var(--ease),color .2s var(--ease);
}
.nav-toggle:hover{border-color:var(--orange)}
.nav-toggle[aria-expanded="true"]{background:var(--orange);border-color:var(--orange);color:#160600}
.nav-toggle-bars{display:inline-flex;flex-direction:column;gap:3px;width:16px}
.nav-toggle-bars i{display:block;height:2px;width:100%;background:currentColor;border-radius:2px;transition:transform .3s var(--ease),opacity .2s var(--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)}
.nav-toggle-text{letter-spacing:.08em}

/* ---------- side rail ---------- */
.rail{
  position:fixed;
  top:0;
  left:0;
  bottom:0;
  width:var(--rail);
  z-index:120;
  display:flex;
  flex-direction:column;
  align-items:center;
  padding:18px 0 20px;
  overflow-y:auto;
  background:linear-gradient(180deg,rgba(18,43,71,.95) 0%,rgba(4,8,15,.98) 62%,#020509 100%);
  border-right:1px solid var(--line);
  box-shadow:14px 0 40px -30px rgba(41,231,212,.6);
}
.rail-head{display:flex;flex-direction:column;align-items:center;gap:10px;flex:none}
.rail-brand{
  display:grid;
  place-items:center;
  width:44px;height:44px;
  border-radius:15px;
  background:linear-gradient(140deg,var(--orange),var(--amber));
  color:#150700;
  font-family:var(--font-display);
  font-weight:900;
  font-size:19px;
  line-height:1;
}
.rail-head-text{display:none}
.rail-list{
  display:flex;
  flex-direction:column;
  gap:2px;
  width:100%;
  margin:auto 0;
  padding:18px 0;
}
.rail-link{
  position:relative;
  display:flex;
  flex-direction:column;
  align-items:center;
  gap:7px;
  width:100%;
  padding:11px 4px;
  color:var(--muted);
  text-decoration:none;
  transition:color .22s var(--ease),background .22s var(--ease);
}
.rail-link::before{
  content:"";
  position:absolute;
  left:0;top:50%;
  width:3px;height:0;
  border-radius:0 3px 3px 0;
  background:var(--orange);
  transform:translateY(-50%);
  transition:height .28s var(--ease);
}
.rail-link:hover{color:var(--ink);background:rgba(41,231,212,.06)}
.rail-link[aria-current="page"]{
  color:var(--ink);
  background:linear-gradient(90deg,rgba(255,106,31,.20),rgba(255,106,31,0) 80%);
}
.rail-link[aria-current="page"]::before{height:62%}
.rail-link[aria-current="page"] .rail-num{color:var(--orange);opacity:1}
.rail-num{
  font-family:var(--font-mono);
  font-size:10.5px;
  letter-spacing:.06em;
  opacity:.55;
}
.rail-label{
  writing-mode:vertical-rl;
  text-orientation:upright;
  font-family:var(--font-display);
  font-weight:700;
  font-size:14px;
  letter-spacing:.14em;
  line-height:1;
}
.rail-foot{
  display:flex;
  flex-direction:column;
  align-items:center;
  gap:10px;
  width:100%;
  padding-top:14px;
  border-top:1px solid var(--line);
  flex:none;
}
.rail-dot{
  width:7px;height:7px;
  border-radius:50%;
  background:var(--orange);
  box-shadow:0 0 0 4px rgba(255,106,31,.18);
  animation:bd-pulse 2.4s var(--ease) infinite;
}
.rail-meta{
  margin:0;
  writing-mode:vertical-rl;
  text-orientation:upright;
  font-size:11px;
  letter-spacing:.2em;
  color:var(--cyan);
}

/* ---------- scrim ---------- */
.nav-scrim{
  position:fixed;
  inset:0;
  z-index:110;
  background:rgba(4,8,15,.74);
  opacity:0;
  visibility:hidden;
  transition:opacity .3s var(--ease),visibility .3s var(--ease);
}
.nav-scrim[data-open]{opacity:1;visibility:visible}
@media (min-width:1025px){.nav-scrim{display:none}}

/* ---------- footer ---------- */
.site-footer{
  margin-top:clamp(48px,7vw,88px);
  border-top:1px solid var(--line);
  background:linear-gradient(180deg,rgba(10,26,43,.95) 0%,rgba(4,8,15,.99) 45%,#020509 100%);
  color:var(--muted);
  position:relative;
}
.site-footer::before{
  content:"";
  position:absolute;
  top:-1px;left:0;
  width:min(240px,42%);
  height:2px;
  background:linear-gradient(90deg,var(--orange),rgba(255,106,31,0));
}
.footer-wrap{padding-block:clamp(36px,5vw,60px) 26px}
.footer-top{
  display:grid;
  grid-template-columns:minmax(0,1fr) minmax(0,1.65fr);
  gap:clamp(28px,4vw,56px);
  align-items:start;
}
.footer-brand{display:flex;flex-direction:column;gap:16px}
.footer-tagline{font-size:14.5px;line-height:1.75;color:var(--muted);max-width:44ch}
.footer-chips{display:flex;flex-wrap:wrap;gap:8px}
.footer-cols{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:28px}
.footer-col{display:flex;flex-direction:column;gap:14px}
.footer-col-title{
  font-family:var(--font-display);
  font-size:13.5px;
  font-weight:700;
  letter-spacing:.16em;
  color:var(--ink);
}
.footer-list{display:flex;flex-direction:column;gap:10px;font-size:14.5px}
.footer-list a{
  position:relative;
  display:inline-block;
  color:var(--muted);
  text-decoration:none;
  transition:color .2s var(--ease);
}
.footer-list a::after{
  content:"";
  position:absolute;
  left:0;bottom:-2px;
  width:0;height:1px;
  background:var(--cyan);
  transition:width .2s var(--ease);
}
.footer-list a:hover{color:var(--cyan)}
.footer-list a:hover::after{width:100%}
.footer-plain{color:var(--muted);word-break:break-all;font-size:14px}
.footer-contact{
  display:grid;
  grid-template-columns:repeat(2,minmax(0,1fr));
  gap:20px 32px;
  margin-top:clamp(28px,4vw,46px);
  padding-top:clamp(20px,3vw,30px);
  border-top:1px solid var(--line);
}
.footer-item{display:flex;flex-direction:column;gap:6px;min-width:0}
.footer-item--wide{grid-column:1 / -1}
.footer-k{font-size:11.5px;font-weight:700;letter-spacing:.16em;color:var(--cyan)}
.footer-v{font-family:var(--font-mono);font-size:14px;color:var(--ink);word-break:break-all}
.footer-v--text{font-family:var(--font-body);font-size:14px;line-height:1.7;color:var(--muted);max-width:72ch}
.footer-bar{
  display:flex;
  flex-wrap:wrap;
  gap:10px 24px;
  align-items:center;
  justify-content:space-between;
  margin-top:clamp(24px,3vw,34px);
  padding-top:18px;
  border-top:1px solid var(--line);
  font-size:12.5px;
}
.footer-icp{font-family:var(--font-mono);letter-spacing:.06em;color:var(--muted)}
.footer-copy{color:var(--muted);letter-spacing:.04em}
@media (max-width:900px){
  .footer-top{grid-template-columns:1fr}
  .footer-cols{grid-template-columns:repeat(2,minmax(0,1fr));gap:24px}
}
@media (max-width:640px){
  .footer-contact{grid-template-columns:1fr}
  .footer-cols{grid-template-columns:1fr;gap:22px}
}

/* ---------- panels ---------- */
.panel{
  position:relative;
  background:var(--panel);
  border:1px solid var(--line);
  border-radius:var(--r-lg);
  padding:clamp(20px,3vw,36px);
  box-shadow:inset 0 1px 0 rgba(41,231,212,.10),0 28px 56px -40px rgba(0,0,0,.95);
}
.panel--indigo{background:linear-gradient(155deg,var(--indigo) 0%,#08182A 100%)}
.panel--green{background:linear-gradient(155deg,var(--green) 0%,#05221F 100%)}
.panel--wine{background:linear-gradient(155deg,var(--wine) 0%,#280A14 100%)}
.panel--flat{box-shadow:none}

/* ---------- section head ---------- */
.section-head{
  display:flex;
  flex-wrap:wrap;
  align-items:flex-end;
  gap:12px 20px;
  margin-bottom:24px;
}
.section-num{
  display:inline-flex;
  align-items:center;
  gap:10px;
  font-family:var(--font-mono);
  font-size:12.5px;
  letter-spacing:.12em;
  color:var(--orange);
}
.section-num::before{
  content:"";
  width:9px;height:9px;
  border-radius:50%;
  background:var(--orange);
  box-shadow:0 0 0 5px rgba(255,106,31,.16);
}
.section-title{margin:0;font-size:clamp(26px,3.2vw,38px)}
.section-sub{margin:0;font-size:14.5px;color:var(--muted);max-width:68ch}
.section-lead{color:var(--muted);max-width:68ch}

/* ---------- chips ---------- */
.chip{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:5px 13px;
  border-radius:var(--r-pill);
  border:1px solid var(--line);
  background:rgba(255,255,255,.03);
  color:var(--muted);
  font-size:12px;
  font-weight:600;
  letter-spacing:.08em;
  line-height:1.5;
  white-space:nowrap;
}
.chip--orange{background:var(--orange);border-color:var(--orange);color:#170600}
.chip--cyan{border-color:rgba(41,231,212,.5);background:rgba(41,231,212,.1);color:var(--cyan)}
.chip--green{background:rgba(11,59,56,.9);border-color:rgba(41,231,212,.28);color:var(--cyan)}
.chip--wine{background:rgba(74,21,38,.9);border-color:rgba(255,106,31,.38);color:var(--amber)}
.chip--ghost{border-style:dashed}

/* ---------- entry list ---------- */
.entry-list{
  display:flex;
  flex-wrap:wrap;
  gap:10px;
  margin-top:22px;
}
.entry-list a{
  display:inline-flex;
  align-items:center;
  gap:9px;
  padding:9px 17px;
  border-radius:var(--r-pill);
  border:1px solid var(--line);
  color:var(--ink);
  font-size:14px;
  font-weight:600;
  text-decoration:none;
  transition:border-color .2s var(--ease),background .2s var(--ease),transform .2s var(--ease);
}
.entry-list a::after{content:"→";color:var(--orange);transition:transform .2s var(--ease)}
.entry-list a:hover{border-color:var(--orange);background:rgba(255,106,31,.1);transform:translateY(-2px)}
.entry-list a:hover::after{transform:translateX(3px)}

/* ---------- breadcrumbs ---------- */
.crumbs{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px;
  margin-bottom:18px;
  font-size:12.5px;
  color:var(--muted);
}
.crumbs li{display:flex;align-items:center;gap:8px}
.crumbs li+li::before{content:"/";color:var(--line)}
.crumbs a{color:var(--muted);text-decoration:none;transition:color .2s var(--ease)}
.crumbs a:hover{color:var(--cyan)}
.crumbs [aria-current="page"]{color:var(--ink)}

/* ---------- prose ---------- */
.prose{max-width:680px}
.prose p{margin-bottom:1.05em;color:var(--muted)}
.prose h2{font-size:clamp(23px,2.6vw,32px);margin:1.6em 0 .5em}
.prose h3{margin:1.4em 0 .4em}
.prose ul{list-style:disc;padding-left:1.25em;color:var(--muted);margin-bottom:1.1em}
.prose ol{list-style:decimal;padding-left:1.35em;color:var(--muted);margin-bottom:1.1em}
.prose li{margin-bottom:.4em}
.prose a{color:var(--cyan);text-decoration:none;border-bottom:1px solid rgba(41,231,212,.45)}
.prose a:hover{border-bottom-color:var(--cyan)}
.prose strong{color:var(--ink);font-weight:700}

/* ---------- figures ---------- */
.figure{
  position:relative;
  margin:0;
  overflow:hidden;
  border-radius:var(--r-md);
  border:1px solid var(--line);
  background:linear-gradient(140deg,var(--indigo),#061420 70%);
}
.figure img{width:100%;height:100%;object-fit:cover;display:block}
.figure--16x9{aspect-ratio:16/9}
.figure--4x3{aspect-ratio:4/3}
.figure--1x1{aspect-ratio:1/1}
.figure--21x9{aspect-ratio:21/9}
.figure figcaption{
  position:absolute;
  left:0;right:0;bottom:0;
  padding:16px 16px 13px;
  background:linear-gradient(0deg,rgba(4,8,15,.94),rgba(4,8,15,0));
  font-size:12.5px;
  letter-spacing:.04em;
  color:var(--muted);
}
.figure--grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:16px}

/* ---------- stats ---------- */
.stat-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:16px}
.stat{
  padding:18px 20px;
  border-radius:var(--r-md);
  border:1px solid var(--line);
  background:rgba(18,43,71,.5);
}
.stat-value{
  font-family:var(--font-mono);
  font-variant-numeric:tabular-nums;
  font-size:clamp(26px,3.4vw,40px);
  font-weight:700;
  line-height:1;
  letter-spacing:-.02em;
  color:var(--cyan);
}
.stat-label{display:block;margin-top:9px;font-size:12.5px;letter-spacing:.08em;color:var(--muted)}

/* ---------- table ---------- */
.table-scroll{
  overflow:auto;
  border:1px solid var(--line);
  border-radius:var(--r-md);
  background:rgba(10,26,43,.6);
}
.data-table{width:100%;min-width:560px;border-collapse:collapse;font-size:14.5px}
.data-table thead th{
  position:sticky;
  top:0;
  z-index:2;
  padding:13px 16px;
  text-align:left;
  background:var(--indigo);
  border-bottom:1px solid var(--line);
  font-family:var(--font-display);
  font-size:14px;
  font-weight:700;
  letter-spacing:.08em;
  color:var(--ink);
}
.data-table td{
  padding:12px 16px;
  border-bottom:1px solid rgba(30,58,84,.6);
  color:var(--muted);
}
.data-table tbody tr:nth-child(even){background:rgba(18,43,71,.28)}
.data-table tbody tr:hover{background:rgba(18,43,71,.7)}
.data-table .num{color:var(--cyan)}

/* ---------- timeline ---------- */
.timeline{
  display:flex;
  flex-direction:column;
  gap:22px;
  padding-left:22px;
  border-left:1px solid var(--line);
}
.timeline-item{position:relative}
.timeline-item::before{
  content:"";
  position:absolute;
  left:-27px;top:9px;
  width:10px;height:10px;
  border-radius:50%;
  background:var(--orange);
  box-shadow:0 0 0 4px rgba(255,106,31,.16);
}
.timeline-time{
  display:block;
  font-family:var(--font-mono);
  font-size:12.5px;
  letter-spacing:.08em;
  color:var(--cyan);
}

/* ---------- fold ---------- */
.fold{
  border:1px solid var(--line);
  border-radius:var(--r-md);
  background:rgba(10,26,43,.72);
  overflow:hidden;
}
.fold+.fold{margin-top:12px}
.fold-summary{
  display:flex;
  align-items:center;
  gap:14px;
  padding:16px 20px;
  cursor:pointer;
  font-size:16.5px;
  font-weight:600;
  color:var(--ink);
  transition:background .2s var(--ease),color .2s var(--ease);
}
.fold-summary::-webkit-details-marker{display:none}
.fold-summary::before{
  content:"";
  flex:none;
  width:0;height:0;
  border-left:7px solid var(--orange);
  border-top:5px solid transparent;
  border-bottom:5px solid transparent;
  transition:transform .3s var(--ease);
}
.fold-summary:hover{background:rgba(18,43,71,.6)}
.fold[open] .fold-summary{background:rgba(18,43,71,.75);color:var(--cyan)}
.fold[open] .fold-summary::before{transform:rotate(90deg)}
.fold-body{
  padding:4px 20px 20px 24px;
  border-left:3px solid var(--orange);
  color:var(--muted);
  font-size:15.5px;
}

/* ---------- callout ---------- */
.callout{
  padding:18px 20px;
  border-radius:var(--r-md);
  border:1px solid var(--line);
  border-left:4px solid var(--cyan);
  background:rgba(11,59,56,.45);
  color:var(--muted);
  font-size:15px;
}
.callout--warn{background:rgba(74,21,38,.5);border-left-color:var(--orange)}
.callout strong{color:var(--ink)}

/* ---------- badge mark ---------- */
.badge-mark{
  position:relative;
  flex:none;
  display:grid;
  place-items:center;
  width:56px;height:56px;
  border-radius:18px;
  overflow:hidden;
  background:conic-gradient(from 210deg,var(--cyan),var(--indigo) 42%,var(--orange) 76%,var(--cyan));
}
.badge-mark::after{content:"";position:absolute;inset:5px;border-radius:13px;background:var(--panel)}
.badge-mark span{position:relative;z-index:1;font-family:var(--font-mono);font-size:15px;font-weight:700;color:var(--cyan)}

/* ---------- reveal ---------- */
[data-reveal]{
  opacity:0;
  transform:translateY(24px);
  transition:opacity .42s var(--ease),transform .42s var(--ease);
}
[data-reveal].is-visible{opacity:1;transform:none}

/* ---------- responsive shell ---------- */
@media (max-width:1024px){
  body{padding-left:0}
  .skip-link{left:10px}
  .scroll-progress{left:0}
  .header-hint{display:none}
  .nav-toggle{display:inline-flex}
  .rail{
    width:min(300px,84vw);
    align-items:stretch;
    padding:20px 18px 22px;
    transform:translateX(-100%);
    transition:transform .34s var(--ease);
    border-right:1px solid rgba(41,231,212,.24);
    background:linear-gradient(180deg,#0B2136 0%,#061420 100%);
    box-shadow:24px 0 60px -30px rgba(0,0,0,.95);
  }
  .rail[data-open]{transform:translateX(0)}
  .rail-head{
    flex-direction:row;
    align-items:center;
    gap:12px;
    padding:0 6px 16px;
    margin-bottom:8px;
    border-bottom:1px solid var(--line);
  }
  .rail-head-text{display:block;font-family:var(--font-display);font-weight:800;font-size:20px;letter-spacing:-.01em;color:var(--ink)}
  .rail-list{gap:2px;margin:0;padding:0}
  .rail-link{flex-direction:row;gap:14px;padding:13px 12px;border-radius:14px}
  .rail-link::before{left:0;border-radius:0 3px 3px 0}
  .rail-link[aria-current="page"]::before{height:56%}
  .rail-label{writing-mode:horizontal-tb;text-orientation:mixed;font-size:16px;letter-spacing:.06em}
  .rail-foot{
    flex-direction:row;
    align-items:center;
    gap:10px;
    margin-top:auto;
    padding:16px 6px 0;
  }
  .rail-meta{writing-mode:horizontal-tb;text-orientation:mixed;font-size:12px;letter-spacing:.16em}
}
@media (max-width:640px){
  .header-strip{font-size:11.5px;letter-spacing:.04em}
  .header-bar{padding-block:12px}
  .brand-name{font-size:19px}
  .brand-sign{font-size:10px;letter-spacing:.12em}
  .header-actions .btn{padding:9px 14px;font-size:14px}
}

/* ---------- reduced motion ---------- */
@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}
  .scroll-progress-bar{transition:none}
}