:root{
  --ink-900:#08131F;
  --ink-700:#10263A;
  --paper-100:#F2ECE1;
  --paper-300:#D8D0C1;
  --signal-500:#FF6B2C;
  --signal-300:#FFA877;
  --cyan-400:#2FD9C6;
  --cyan-200:#9BF0E6;
  --text-900:#0E1C28;
  --gray-500:#6E7E8C;

  --muted:rgba(242,236,225,.66);
  --hair:rgba(216,208,193,.30);
  --hair-soft:rgba(216,208,193,.16);

  --font-display:"HarmonyOS Sans SC","Source Han Sans SC","Noto Sans SC","PingFang SC",system-ui,sans-serif;
  --font-body:"Noto Sans SC","PingFang SC","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  --font-mono:"JetBrains Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;

  --header-h:76px;
  --shell:1560px;
  --gutter:clamp(18px,4vw,64px);
  --radius:4px;
  --dur:200ms;
  --ease:cubic-bezier(.22,.61,.36,1);
}

*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  background:var(--ink-900);
  color:var(--paper-100);
  font-family:var(--font-body);
  font-size:17px;
  line-height:1.85;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
h1,h2,h3,h4,h5,p,ul,ol,dl,dd,figure,blockquote{margin:0}
ul,ol{padding:0;list-style:none}
h1,h2,h3,h4{line-height:1.3}
strong,b{font-weight:700}
img,svg{max-width:100%}
[hidden]{display:none !important}
::selection{background:var(--signal-500);color:var(--ink-900)}

a{color:var(--cyan-400);text-decoration:none;transition:color var(--dur) var(--ease)}
a:hover{color:var(--cyan-200)}
:focus-visible{outline:2px solid var(--cyan-400);outline-offset:3px;border-radius:2px}

.visually-hidden{position:absolute !important;width:1px;height:1px;margin:-1px;padding:0;overflow:hidden;clip:rect(0 0 0 0);clip-path:inset(50%);white-space:nowrap;border:0}

/* ---------- layout shells ---------- */
.shell{width:100%;max-width:var(--shell);margin:0 auto;padding-inline:var(--gutter)}
.content-offset{padding-top:var(--header-h)}
.section{padding-block:clamp(48px,7vw,96px)}
.section--tight{padding-block:clamp(28px,4vw,52px)}
.split-layout{display:grid;grid-template-columns:minmax(0,62fr) minmax(0,38fr);gap:clamp(24px,3vw,56px);align-items:start}
.split-layout__main{min-width:0}
.split-layout__rail{min-width:0}
.measure-100{width:100%}
.measure-86{width:86%}
.measure-72{width:72%}

/* ---------- typography ---------- */
.page-title{font-family:var(--font-display);font-weight:800;font-size:clamp(32px,5.2vw,68px);line-height:1.14;letter-spacing:-.02em;color:var(--paper-100)}
.page-title__no{display:block;font-family:var(--font-mono);font-size:13px;font-weight:600;letter-spacing:.16em;color:var(--signal-500);margin-bottom:16px}
.section-title{font-family:var(--font-display);font-weight:800;font-size:clamp(23px,3vw,36px);line-height:1.32;letter-spacing:-.01em;color:var(--paper-100)}
.section-title::after{content:"";display:block;width:52px;height:3px;background:var(--cyan-400);margin-top:16px}
.sub-title{font-family:var(--font-body);font-weight:700;font-size:19px;line-height:1.5;color:inherit}
.prose{max-width:34em;font-size:17px;line-height:1.85;color:rgba(242,236,225,.86)}
.prose p + p{margin-top:1.05em}
.prose ul{margin-top:1em;display:flex;flex-direction:column;gap:.5em}
.prose li{position:relative;padding-left:18px}
.prose li::before{content:"";position:absolute;left:0;top:.78em;width:7px;height:1px;background:var(--signal-500)}
.note{font-size:13.5px;line-height:1.75;color:var(--muted)}
.paper .note{color:var(--gray-500)}
.paper .prose,.paper .sub-title{color:var(--text-900)}
.paper .section-title{color:var(--text-900)}
.paper .section-title::after{background:var(--signal-500)}
.paper .prose a,.paper a{color:var(--text-900);border-bottom:1.5px solid var(--signal-500)}
.paper .prose a:hover,.paper a:hover{color:var(--ink-700);border-bottom-color:var(--signal-300)}

/* ---------- header ---------- */
.skip-link{position:fixed;left:16px;top:0;z-index:400;transform:translateY(-130%);padding:10px 18px;background:var(--signal-500);color:var(--ink-900);font-family:var(--font-mono);font-size:13px;font-weight:600;letter-spacing:.04em;border-radius:0 0 var(--radius) var(--radius);transition:transform var(--dur) var(--ease)}
.skip-link:focus{transform:translateY(0);color:var(--ink-900)}

.site-header{
  position:fixed;top:0;left:0;right:0;z-index:120;
  background:linear-gradient(180deg,rgba(8,19,31,.94) 0%,rgba(8,19,31,.62) 58%,rgba(8,19,31,0) 100%);
  border-bottom:1px solid transparent;
  transition:background-color var(--dur) var(--ease),border-color var(--dur) var(--ease);
}
.site-header.is-stuck{background:var(--ink-700);border-bottom-color:var(--paper-300)}
.header-inner{max-width:var(--shell);margin:0 auto;height:var(--header-h);padding:0 var(--gutter);display:flex;align-items:center;gap:clamp(14px,2vw,36px);transition:height var(--dur) var(--ease)}
.site-header.is-stuck .header-inner{height:62px}

.brand{display:inline-flex;align-items:center;gap:12px;flex:0 0 auto;color:var(--paper-100);text-decoration:none}
.brand:hover{color:var(--paper-100)}
.brand__stamp{display:grid;place-items:center;width:34px;height:34px;border:2px solid var(--signal-500);border-radius:2px;color:var(--signal-500);font-family:var(--font-mono);font-size:15px;font-weight:700;line-height:1;flex:0 0 auto}
.brand__text{display:flex;flex-direction:column;line-height:1.2}
.brand__name{font-family:var(--font-display);font-weight:800;font-size:16px;letter-spacing:.01em}
.brand__line{font-family:var(--font-mono);font-size:10.5px;letter-spacing:.06em;color:var(--cyan-200);opacity:.82;margin-top:3px}

.site-nav{display:flex;align-items:center;flex:1 1 auto;min-width:0}
.nav-list{display:flex;align-items:center;gap:clamp(10px,1.6vw,26px);flex-wrap:wrap}
.nav-link{position:relative;display:inline-block;padding:6px 2px;font-size:15px;font-weight:500;letter-spacing:.02em;color:rgba(242,236,225,.84)}
.nav-link::after{content:"";position:absolute;left:0;right:0;bottom:0;height:2px;background:var(--signal-500);transform:scaleX(0);transform-origin:left;transition:transform var(--dur) var(--ease)}
.nav-link:hover{color:var(--paper-100)}
.nav-link:hover::after{transform:scaleX(1)}
.nav-link[aria-current="page"]{color:var(--paper-100);font-weight:700}
.nav-link[aria-current="page"]::after{transform:scaleX(1);background:var(--cyan-400)}

.header-tools{display:flex;align-items:center;gap:10px;margin-left:auto;flex:0 0 auto}
.record-mark{display:inline-flex;align-items:center;gap:7px;padding:5px 10px;border:1px dashed rgba(216,208,193,.5);border-radius:2px;font-family:var(--font-mono);font-size:11px;letter-spacing:.05em;color:var(--cyan-200);white-space:nowrap}
.record-mark__dot{width:6px;height:6px;border-radius:50%;background:var(--signal-500);box-shadow:0 0 0 3px rgba(255,107,44,.18);flex:0 0 auto}

.header-search{position:relative;display:flex;align-items:center}
.search-icon{position:absolute;left:9px;top:50%;transform:translateY(-50%);width:13px;height:13px;color:var(--cyan-200);pointer-events:none}
.search-input{width:clamp(132px,14vw,196px);padding:7px 10px 7px 28px;background:rgba(8,19,31,.55);border:1px solid rgba(216,208,193,.4);border-radius:2px;color:var(--paper-100);font-family:var(--font-mono);font-size:12px;line-height:1.5}
.search-input::placeholder{color:rgba(155,240,230,.62)}
.search-input:focus{border-color:var(--cyan-400);background:rgba(8,19,31,.85);outline:none}
.search-input:focus-visible{outline:2px solid var(--cyan-400);outline-offset:2px}

.rail-toggle{display:none;font-family:var(--font-mono);font-size:11.5px;letter-spacing:.06em;padding:6px 11px;background:transparent;color:var(--paper-100);border:1px solid rgba(216,208,193,.45);border-radius:2px;cursor:pointer;transition:border-color var(--dur) var(--ease),color var(--dur) var(--ease),background-color var(--dur) var(--ease)}
.rail-toggle:hover{border-color:var(--cyan-400);color:var(--cyan-200)}
.rail-toggle[aria-expanded="true"]{background:var(--signal-500);border-color:var(--signal-500);color:var(--ink-900)}

.nav-toggle{display:none;align-items:center;justify-content:center;width:40px;height:32px;padding:0;background:transparent;color:var(--paper-100);border:1px solid rgba(216,208,193,.45);border-radius:2px;cursor:pointer}
.nav-toggle:hover{border-color:var(--cyan-400);color:var(--cyan-200)}
.nav-toggle__bars{position:relative;display:block;width:16px;height:1.5px;background:currentColor;transition:background-color var(--dur) var(--ease)}
.nav-toggle__bars::before,.nav-toggle__bars::after{content:"";position:absolute;left:0;width:16px;height:1.5px;background:currentColor;transition:transform var(--dur) var(--ease),top var(--dur) var(--ease)}
.nav-toggle__bars::before{top:-5px}
.nav-toggle__bars::after{top:5px}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars{background:transparent}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::before{top:0;transform:rotate(45deg)}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::after{top:0;transform:rotate(-45deg)}

.scroll-progress{position:absolute;left:0;right:0;bottom:-1px;height:2px;transform:scaleX(0);transform-origin:left;background:linear-gradient(90deg,var(--cyan-400),var(--signal-500));pointer-events:none}

/* ---------- footer ---------- */
.site-footer{background:var(--ink-700);border-top:1px solid var(--paper-300);color:var(--paper-100)}
.footer-band{display:flex;align-items:center;gap:clamp(10px,2vw,26px);max-width:var(--shell);margin:0 auto;padding:14px var(--gutter);border-bottom:1px dashed var(--hair);font-family:var(--font-mono);font-size:11px;letter-spacing:.14em;color:var(--cyan-200)}
.footer-band__item{display:inline-flex;align-items:center;gap:8px;white-space:nowrap}
.footer-band__item::before{content:"";display:block;width:5px;height:5px;background:var(--signal-500)}
.footer-band__rule{flex:1 1 auto;height:1px;background:repeating-linear-gradient(90deg,rgba(216,208,193,.42) 0 8px,transparent 8px 16px)}

.footer-body{max-width:var(--shell);margin:0 auto;padding:clamp(34px,5vw,64px) var(--gutter) clamp(28px,4vw,48px);display:grid;grid-template-columns:minmax(220px,1.4fr) repeat(3,minmax(150px,1fr));gap:clamp(24px,3vw,56px)}
.footer-brand{display:flex;flex-direction:column;gap:16px}
.brand--footer{gap:10px}
.brand--footer .brand__stamp{width:30px;height:30px;font-size:13px}
.footer-brand__note{font-size:14px;line-height:1.8;color:var(--muted);max-width:26em}
.footer-brand__icp{font-family:var(--font-mono);font-size:11.5px;letter-spacing:.04em;color:rgba(242,236,225,.5)}
.footer-col{min-width:0}
.footer-col__title{font-family:var(--font-mono);font-size:11px;font-weight:600;letter-spacing:.14em;color:var(--cyan-200);margin-bottom:14px;padding-bottom:8px;border-bottom:1px solid var(--hair-soft)}
.footer-list{display:flex;flex-direction:column;gap:9px}
.footer-link{position:relative;display:inline-block;padding-left:14px;font-size:14.5px;color:rgba(242,236,225,.84)}
.footer-link::before{content:"";position:absolute;left:0;top:.8em;width:6px;height:1px;background:var(--signal-500);transition:width var(--dur) var(--ease),background-color var(--dur) var(--ease)}
.footer-link:hover{color:var(--cyan-200)}
.footer-link:hover::before{width:10px;background:var(--cyan-400)}
.footer-link[aria-current="page"]{color:var(--signal-300);font-weight:700}
.footer-link[aria-current="page"]::before{width:10px;background:var(--signal-300)}
.footer-meta{display:flex;flex-direction:column;gap:12px;font-size:14.5px}
.footer-meta__key{display:block;font-family:var(--font-mono);font-size:10.5px;letter-spacing:.12em;color:var(--cyan-200);opacity:.78;margin-bottom:2px}
.footer-meta__value{display:block;color:rgba(242,236,225,.86);line-height:1.65;word-break:break-word}

.footer-legal{max-width:var(--shell);margin:0 auto;padding:18px var(--gutter) 26px;border-top:1px solid var(--hair-soft);display:flex;flex-wrap:wrap;gap:10px 28px;align-items:baseline;justify-content:space-between;font-size:12.5px;color:rgba(242,236,225,.58)}
.footer-legal__icp{font-family:var(--font-mono);letter-spacing:.04em;white-space:nowrap}
.footer-legal__note{max-width:64ch;line-height:1.7}

/* ---------- paper surfaces ---------- */
.paper{position:relative;background:var(--paper-100);color:var(--text-900);border:1px solid var(--paper-300);border-radius:var(--radius);padding:clamp(22px,3.4vw,44px)}
.paper::before{content:"";position:absolute;inset:0;border-radius:inherit;pointer-events:none;background-image:radial-gradient(rgba(14,28,40,.05) 1px,transparent 1px),radial-gradient(rgba(14,28,40,.035) 1px,transparent 1px);background-size:3px 3px,7px 7px;background-position:1px 1px,4px 3px}
.paper-stack{position:relative;isolation:isolate}
.paper-stack::before,.paper-stack::after{content:"";position:absolute;inset:0;border-radius:var(--radius);border:1px solid rgba(14,28,40,.12);z-index:-1}
.paper-stack::before{transform:translate(10px,10px);background:var(--paper-300)}
.paper-stack::after{transform:translate(5px,5px);background:#E6DECF}

/* ---------- index rail ---------- */
.index-rail{position:sticky;top:calc(var(--header-h) + 22px);background:var(--ink-700);border:1px solid var(--hair);border-radius:var(--radius);padding:20px 18px 18px}
.index-rail__head{display:flex;align-items:baseline;justify-content:space-between;gap:12px;padding-bottom:12px;margin-bottom:14px;border-bottom:1px dashed var(--hair)}
.index-rail__title{font-family:var(--font-display);font-weight:800;font-size:15px;letter-spacing:.02em;color:var(--paper-100)}
.index-rail__count{font-family:var(--font-mono);font-size:11px;letter-spacing:.08em;color:var(--signal-300)}
.index-rail__list{display:flex;flex-direction:column;gap:2px;max-height:min(62vh,540px);overflow:auto}
.index-rail__link{display:grid;grid-template-columns:96px minmax(0,1fr);gap:10px;align-items:baseline;padding:8px 8px 8px 10px;border-left:2px solid transparent;font-size:14px;line-height:1.6;color:rgba(242,236,225,.76);transition:color 180ms var(--ease),background-color 180ms var(--ease),border-color 180ms var(--ease)}
.index-rail__link:hover{color:var(--paper-100);background:rgba(47,217,198,.08)}
.index-rail__link[aria-current="true"]{color:var(--paper-100);background:rgba(255,107,44,.1);border-left-color:var(--signal-500)}
.index-rail__no{font-family:var(--font-mono);font-size:11.5px;letter-spacing:.04em;color:var(--cyan-200)}
.index-rail__link[aria-current="true"] .index-rail__no{color:var(--signal-300)}

/* ---------- cards, stamps, tags ---------- */
.version-card{position:relative;background:var(--ink-700);border:1px solid var(--hair);border-radius:var(--radius);padding:22px 24px}
.version-card__head{display:flex;flex-wrap:wrap;align-items:center;gap:10px 14px;margin-bottom:12px}
.version-card__no{font-family:var(--font-mono);font-size:12px;font-weight:600;letter-spacing:.08em;color:var(--signal-300)}
.version-card__title{font-family:var(--font-display);font-weight:800;font-size:20px;letter-spacing:-.01em;color:var(--paper-100)}
.version-card__meta{font-family:var(--font-mono);font-size:11.5px;letter-spacing:.04em;color:var(--muted)}
.version-card__body{font-size:15.5px;line-height:1.8;color:rgba(242,236,225,.82)}

.entry-no{display:inline-flex;align-items:center;justify-content:center;min-width:34px;padding:3px 8px;background:var(--signal-500);color:var(--ink-900);font-family:var(--font-mono);font-size:12px;font-weight:700;letter-spacing:.04em;line-height:1.4;border-radius:2px}
.entry-no--ghost{background:transparent;color:var(--signal-300);border:1px solid var(--signal-500)}

.tag{display:inline-flex;align-items:center;gap:8px;padding:3px 14px 3px 20px;background:rgba(47,217,198,.1);border:1px solid var(--cyan-400);color:var(--cyan-200);font-family:var(--font-mono);font-size:11px;letter-spacing:.1em;line-height:1.7;clip-path:polygon(9px 0,100% 0,100% 100%,9px 100%,0 50%)}
.tag--signal{background:rgba(255,107,44,.14);border-color:var(--signal-500);color:var(--signal-300)}
.tag--paper{background:rgba(255,107,44,.12);border-color:rgba(14,28,40,.35);color:var(--text-900)}

/* ---------- buttons ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:9px;padding:12px 22px;font-family:var(--font-body);font-size:15px;font-weight:700;line-height:1.2;letter-spacing:.01em;border:1px solid transparent;border-radius:2px;cursor:pointer;text-decoration:none;transition:background-color var(--dur) var(--ease),color var(--dur) var(--ease),border-color var(--dur) var(--ease),transform var(--dur) var(--ease)}
.btn--primary{background:var(--signal-500);color:var(--ink-900);border-color:var(--signal-500)}
.btn--primary:hover{background:var(--signal-300);border-color:var(--signal-300);color:var(--ink-900)}
.btn--ghost{background:transparent;color:var(--paper-100);border-color:rgba(216,208,193,.55)}
.btn--ghost:hover{border-color:var(--cyan-400);color:var(--cyan-200)}
.btn--quiet{background:transparent;color:var(--cyan-400);border-color:var(--cyan-400)}
.btn--quiet:hover{background:rgba(47,217,198,.12);color:var(--cyan-200)}
.btn--sm{padding:8px 14px;font-size:13.5px}
.btn:active{transform:translateY(1px)}
.paper .btn--ghost{color:var(--text-900);border-color:rgba(14,28,40,.35)}
.paper .btn--ghost:hover{border-color:var(--signal-500);color:var(--ink-700)}

/* ---------- breadcrumb ---------- */
.breadcrumb{margin-bottom:clamp(20px,3vw,32px)}
.breadcrumb__list{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-family:var(--font-mono);font-size:11.5px;letter-spacing:.06em;color:var(--muted)}
.breadcrumb__list li + li::before{content:"/";margin-right:8px;color:rgba(216,208,193,.42)}
.breadcrumb__link{color:var(--muted)}
.breadcrumb__link:hover{color:var(--cyan-200)}
.breadcrumb__current{color:var(--cyan-200)}

/* ---------- steps ---------- */
.step-list{position:relative;display:flex;flex-direction:column}
.step-list > li{position:relative;padding-left:56px;padding-bottom:30px}
.step-list > li::before{content:"";position:absolute;left:17px;top:36px;bottom:0;width:1px;background:linear-gradient(180deg,var(--hair),rgba(216,208,193,.06))}
.step-list > li:last-child{padding-bottom:0}
.step-list > li:last-child::before{display:none}
.step__no{position:absolute;left:0;top:0;display:grid;place-items:center;width:35px;height:35px;border:1px solid var(--signal-500);border-radius:50%;background:var(--ink-900);color:var(--signal-300);font-family:var(--font-mono);font-size:12px;font-weight:700}
.step__title{font-family:var(--font-display);font-weight:800;font-size:18px;line-height:1.4;margin-bottom:6px;color:var(--paper-100)}
.step__text{font-size:15.5px;line-height:1.8;color:rgba(242,236,225,.8);max-width:32em}
.paper .step__no{background:var(--paper-100)}
.paper .step__title,.paper .step__text{color:var(--text-900)}
.paper .step__text{color:rgba(14,28,40,.82)}

/* ---------- collapsible ---------- */
.fold{border-bottom:1px solid var(--hair)}
.fold__summary{display:flex;align-items:center;gap:12px;padding:16px 0;cursor:pointer;font-size:16px;font-weight:600;color:var(--paper-100);list-style:none}
.fold__summary::-webkit-details-marker{display:none}
.fold__summary::after{content:"+";margin-left:auto;font-family:var(--font-mono);font-size:16px;line-height:1;color:var(--signal-500);transition:transform var(--dur) var(--ease)}
.fold[open] .fold__summary::after{transform:rotate(45deg)}
.fold__body{padding:0 0 18px;font-size:15.5px;line-height:1.85;color:rgba(242,236,225,.82);max-width:34em}
.paper .fold{border-bottom-color:rgba(14,28,40,.16)}
.paper .fold__summary{color:var(--text-900)}
.paper .fold__body{color:rgba(14,28,40,.82)}

/* ---------- tabs ---------- */
.tabs{display:flex;flex-direction:column}
.tablist{display:flex;flex-wrap:wrap;gap:4px;border-bottom:1px solid var(--hair);margin-bottom:22px}
.tab{appearance:none;border:1px solid transparent;border-bottom:0;border-radius:2px 2px 0 0;background:transparent;color:rgba(242,236,225,.72);font-family:var(--font-body);font-size:14.5px;font-weight:600;line-height:1.4;padding:10px 16px;cursor:pointer;transition:color var(--dur) var(--ease),background-color var(--dur) var(--ease)}
.tab:hover{color:var(--paper-100);background:rgba(47,217,198,.08)}
.tab[aria-selected="true"]{background:var(--paper-100);border-color:var(--paper-300);color:var(--text-900)}
.tabpanel{display:none}
.tabpanel[data-active="true"]{display:block;animation:tabIn 200ms var(--ease)}
@keyframes tabIn{from{opacity:0;transform:translateY(6px)}to{opacity:1;transform:none}}

/* ---------- copy affordance ---------- */
.copy-btn{display:inline-flex;align-items:center;gap:6px;padding:2px 9px;background:transparent;border:1px solid rgba(216,208,193,.4);border-radius:2px;color:var(--cyan-200);font-family:var(--font-mono);font-size:11px;letter-spacing:.06em;line-height:1.8;cursor:pointer;transition:border-color var(--dur) var(--ease),color var(--dur) var(--ease),background-color var(--dur) var(--ease)}
.copy-btn:hover{border-color:var(--cyan-400);background:rgba(47,217,198,.1)}
.copy-btn.is-copied{border-color:var(--signal-500);background:rgba(255,107,44,.12);color:var(--signal-300)}
.paper .copy-btn{color:var(--ink-700);border-color:rgba(14,28,40,.3)}
.paper .copy-btn.is-copied{color:var(--ink-900);border-color:var(--signal-500);background:rgba(255,107,44,.18)}

/* ---------- reusable media frames ---------- */
.figure{margin:0}
.figure__media{position:relative;overflow:hidden;aspect-ratio:16/10;border:1px solid var(--paper-300);border-radius:var(--radius);background:
  radial-gradient(120% 90% at 12% 8%,rgba(47,217,198,.16),transparent 60%),
  radial-gradient(90% 80% at 88% 100%,rgba(255,107,44,.14),transparent 62%),
  linear-gradient(160deg,var(--ink-700),var(--ink-900))}
.figure__media > img,.figure__media > svg,.figure__media > picture{display:block;width:100%;height:100%;object-fit:cover}
.figure__caption{margin-top:10px;font-family:var(--font-mono);font-size:11.5px;letter-spacing:.04em;line-height:1.7;color:var(--muted)}
.paper .figure__caption{color:var(--gray-500)}
.figure--square .figure__media{aspect-ratio:1/1}
.figure--portrait .figure__media{aspect-ratio:4/5}
.figure--wide .figure__media{aspect-ratio:21/9}

/* ---------- reveal ---------- */
.js-ready [data-reveal]{opacity:0;transform:translateY(12px);transition:opacity 420ms var(--ease),transform 420ms var(--ease)}
.js-ready [data-reveal].is-visible{opacity:1;transform:none}

/* ---------- responsive ---------- */
@media (max-width:1240px){
  .nav-link{font-size:14px}
  .nav-list{gap:12px}
  .record-mark{display:none}
}
@media (max-width:1180px){
  .split-layout{grid-template-columns:minmax(0,1fr)}
  .rail-toggle{display:inline-flex}
  .index-rail{position:static;display:none;margin-top:8px}
  .index-rail[data-open="true"]{display:block}
  .measure-86,.measure-72{width:100%}
  .footer-body{grid-template-columns:repeat(2,minmax(0,1fr))}
  .footer-brand{grid-column:1 / -1}
}
@media (max-width:1080px){
  .header-search{display:none}
}
@media (max-width:1000px){
  .nav-toggle{display:inline-flex}
  .site-nav{position:absolute;left:0;right:0;top:100%;display:none;padding:10px var(--gutter) 22px;background:var(--ink-700);border-bottom:1px solid var(--paper-300);box-shadow:0 18px 32px rgba(8,19,31,.45)}
  .site-nav[data-open="true"]{display:block}
  .nav-list{flex-direction:column;align-items:flex-start;gap:0;width:100%}
  .nav-list li{width:100%;border-bottom:1px dashed var(--hair-soft)}
  .nav-list li:last-child{border-bottom:0}
  .nav-link{display:block;width:100%;padding:13px 2px;font-size:16px}
  .nav-link::after{display:none}
  .nav-link[aria-current="page"]{color:var(--signal-300)}
  .nav-link[aria-current="page"]::before{content:"▍";margin-right:8px;color:var(--signal-500)}
}
@media (max-width:760px){
  .brand__line{display:none}
  .header-inner{height:64px}
  .figure__media{aspect-ratio:4/3}
  .footer-band{font-size:10px;letter-spacing:.1em}
}
@media (max-width:620px){
  .footer-body{grid-template-columns:minmax(0,1fr)}
  .footer-legal{flex-direction:column;align-items:flex-start}
}

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