/* ============================================================
   轻量指南 · /assets/site.css
   共享外壳：轨道导航 / 抽屉 / 页脚 / 通用组件
   ============================================================ */

/* ---------- 1. Reset ---------- */
*,*::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,p,ul,ol,dl,dd,figure,blockquote,pre{margin:0}
ul[class],ol[class]{list-style:none;padding:0}
img,svg,video{display:block;max-width:100%;height:auto}
button,input,select,textarea{font:inherit;color:inherit}
figure{margin:0}
hr{border:0;border-top:1px solid var(--line-on-paper);margin:0}

/* ---------- 2. Tokens ---------- */
:root{
  --ink-moss:#0B2B23;
  --deep-fern:#14453A;
  --paper:#F5F2E9;
  --mist:#E3E6E1;
  --rock:#6E7B76;
  --charcoal:#171C1A;
  --signal:#FF6B2C;
  --signal-soft:#FF834F;
  --fluoro:#2ED3C0;
  --terracotta:#B9603C;

  --line-on-paper:#C9D8D2;
  --line-on-ink:rgba(245,242,233,.18);
  --ink-1:rgba(245,242,233,.86);
  --ink-2:rgba(245,242,233,.62);
  --ink-3:rgba(245,242,233,.40);

  --rail-w:88px;
  --topbar-h:60px;
  --shell-pad:clamp(20px,4vw,56px);
  --measure:1180px;

  --font-display:"Archivo Narrow","Oswald","Arial Narrow","PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC",sans-serif;
  --font-body:"Inter","PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC",system-ui,-apple-system,sans-serif;
  --font-mono:"JetBrains Mono","IBM Plex Mono","SFMono-Regular",Menlo,Consolas,"Courier New",monospace;

  --step-1:13px;
  --step-2:17px;
  --step-3:22px;
  --step-4:32px;
  --step-5:44px;
  --step-6:64px;

  --ease:cubic-bezier(.2,.6,.2,1);
  --doc-progress:0;
}

/* ---------- 3. Base typography ---------- */
body{
  font-family:var(--font-body);
  font-size:17px;
  line-height:1.75;
  color:var(--charcoal);
  background-color:var(--paper);
  -webkit-font-smoothing:antialiased;
  min-height:100vh;
  padding-left:var(--rail-w);
  overflow-x:hidden;
}
@media (max-width:1023px){
  body{padding-left:0;padding-top:var(--topbar-h)}
  html{scroll-padding-top:calc(var(--topbar-h) + 16px)}
}

h1,h2,h3,h4{
  font-family:var(--font-display);
  font-weight:900;
  line-height:1.14;
  letter-spacing:-.02em;
  color:var(--ink-moss);
  text-wrap:balance;
}
h1{font-size:clamp(34px,6vw,64px)}
h2{font-size:clamp(26px,3.6vw,44px)}
h3{font-size:clamp(20px,2.2vw,32px)}
h4{font-size:clamp(17px,1.6px + 1vw,22px);letter-spacing:0;font-weight:700}

p{line-height:1.75}
strong{font-weight:700;color:var(--ink-moss)}
small{font-size:var(--step-1)}

a{color:var(--deep-fern);text-underline-offset:.22em;text-decoration-thickness:1px}
a:hover{color:var(--ink-moss)}

::selection{background:var(--fluoro);color:var(--ink-moss)}

:focus-visible{outline:2px solid var(--charcoal);outline-offset:3px;border-radius:2px}
.rail :focus-visible,
.topbar :focus-visible,
.drawer :focus-visible,
.site-footer :focus-visible,
.btn--signal:focus-visible,
.btn--quiet:focus-visible{outline-color:var(--fluoro)}

/* ---------- 4. Skip link ---------- */
.skip-link{
  position:fixed;
  top:10px;
  left:12px;
  z-index:200;
  padding:10px 18px;
  background:var(--signal);
  color:#14100D;
  font-size:13px;
  font-weight:700;
  letter-spacing:.04em;
  text-decoration:none;
  border-radius:2px;
  transform:translateY(-180%);
  transition:transform .2s var(--ease);
}
@media (min-width:1024px){.skip-link{left:calc(var(--rail-w) + 12px)}}
.skip-link:focus-visible{transform:translateY(0);color:#14100D}

/* ---------- 5. Header shell ---------- */
.site-header{position:relative;z-index:80}
.site-header a{text-decoration:none}

/* 5.1 桌面左侧轨道 */
.rail{display:none}
@media (min-width:1024px){
  .rail{
    position:fixed;
    inset:0 auto 0 0;
    width:var(--rail-w);
    z-index:90;
    display:flex;
    flex-direction:column;
    align-items:center;
    justify-content:space-between;
    gap:20px;
    padding:22px 0 24px;
    background:var(--ink-moss);
    background-image:repeating-linear-gradient(180deg,rgba(245,242,233,.05) 0 1px,transparent 1px 48px);
    border-right:1px solid var(--line-on-ink);
    overflow-y:auto;
    overscroll-behavior:contain;
    scrollbar-width:none;
  }
  .rail::-webkit-scrollbar{width:0;height:0}
}

.rail__mark{
  display:flex;
  flex-direction:column;
  align-items:center;
  gap:12px;
  color:var(--paper);
  flex:0 0 auto;
}
.rail__dot{
  width:10px;height:10px;border-radius:50%;
  background:var(--signal);
  box-shadow:0 0 0 4px rgba(255,107,44,.16);
}
.rail__wordmark{
  writing-mode:vertical-rl;
  text-orientation:upright;
  font-family:var(--font-mono);
  font-size:10px;
  letter-spacing:.32em;
  line-height:1;
  color:var(--fluoro);
  text-transform:uppercase;
}
.rail__nav{
  flex:1 1 auto;
  display:flex;
  align-items:center;
  justify-content:center;
  width:100%;
  min-height:0;
}
.rail__list{
  display:flex;
  flex-direction:column;
  align-items:center;
  gap:20px;
  margin:0;
  padding:0;
  list-style:none;
}
.rail__link{
  position:relative;
  display:block;
  padding:6px 4px;
  writing-mode:vertical-rl;
  text-orientation:upright;
  font-size:13px;
  letter-spacing:.2em;
  line-height:1.2;
  color:var(--ink-2);
  transition:color .2s var(--ease);
}
.rail__link::before{
  content:"";
  position:absolute;
  left:-7px;
  top:50%;
  width:2px;
  height:0;
  background:var(--fluoro);
  transform:translateY(-50%);
  transition:height .24s var(--ease);
}
.rail__link:hover,.rail__link:focus-visible{color:var(--paper)}
.rail__link:hover::before,.rail__link:focus-visible::before{height:62%}
.rail__link[aria-current="page"]{
  color:var(--paper);
  font-weight:700;
}
.rail__link[aria-current="page"]::before{
  height:100%;
  background:var(--signal);
}
.rail__link[aria-current="page"]::after{
  content:"";
  position:absolute;
  left:-11px;
  top:50%;
  width:6px;height:6px;
  border-radius:50%;
  background:var(--signal);
  transform:translateY(-50%);
  box-shadow:0 0 0 3px rgba(255,107,44,.18);
}

.rail__foot{
  flex:0 0 auto;
  display:flex;
  flex-direction:column;
  align-items:center;
  gap:18px;
}
.rail__cta{
  display:block;
  writing-mode:vertical-rl;
  text-orientation:upright;
  font-size:12px;
  font-weight:700;
  letter-spacing:.2em;
  line-height:1.2;
  padding:16px 8px;
  background:var(--signal);
  color:#14100D;
  border-radius:2px;
  text-align:center;
  transition:background-color .18s var(--ease),transform .18s var(--ease);
}
.rail__cta:hover,.rail__cta:focus-visible{background:var(--signal-soft);color:#14100D;transform:translateX(2px)}
.rail__progress{
  width:3px;
  height:72px;
  display:flex;
  align-items:flex-end;
  background:rgba(245,242,233,.16);
  border-radius:2px;
  overflow:hidden;
}
.rail__progress-fill{
  display:block;
  width:100%;
  height:calc(var(--doc-progress,0) * 100%);
  background:var(--fluoro);
  border-radius:2px;
}

/* 5.2 移动顶栏 */
.topbar{
  position:fixed;
  inset:0 0 auto 0;
  z-index:95;
  height:var(--topbar-h);
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:12px;
  padding:0 16px;
  background:var(--ink-moss);
  border-bottom:1px solid var(--line-on-ink);
  color:var(--paper);
}
@media (min-width:1024px){.topbar{display:none}}

.topbar__brand{
  display:inline-flex;
  align-items:baseline;
  gap:9px;
  color:var(--paper);
  min-width:0;
}
.topbar__dot{
  width:8px;height:8px;border-radius:50%;
  background:var(--signal);
  align-self:center;
  flex:0 0 auto;
  box-shadow:0 0 0 3px rgba(255,107,44,.16);
}
.topbar__name{
  font-family:var(--font-display);
  font-weight:900;
  font-size:19px;
  letter-spacing:.02em;
  color:var(--paper);
}
.topbar__mono{
  font-family:var(--font-mono);
  font-size:9px;
  letter-spacing:.22em;
  color:var(--fluoro);
  white-space:nowrap;
}
@media (max-width:399px){.topbar__mono{display:none}}

.navbtn{
  display:inline-flex;
  align-items:center;
  gap:9px;
  padding:8px 12px;
  background:transparent;
  border:1px solid var(--line-on-ink);
  border-radius:2px;
  color:var(--paper);
  font-size:12px;
  letter-spacing:.16em;
  cursor:pointer;
  transition:border-color .18s var(--ease),color .18s var(--ease);
}
.navbtn:hover{border-color:rgba(245,242,233,.4)}
.navbtn__bars{
  position:relative;
  display:block;
  width:18px;
  height:12px;
  border-top:1.5px solid currentColor;
  border-bottom:1.5px solid currentColor;
  transition:border-color .18s var(--ease);
}
.navbtn__bars::after{
  content:"";
  position:absolute;
  left:0;right:0;top:50%;
  height:1.5px;
  background:currentColor;
  transform:translateY(-50%);
  transition:transform .22s var(--ease),background-color .18s var(--ease);
}
.navbtn__text{line-height:1}
.navbtn[aria-expanded="true"]{border-color:var(--signal);color:var(--signal)}
.navbtn[aria-expanded="true"] .navbtn__bars::after{background:var(--signal)}

/* 5.3 移动抽屉 */
.drawer{
  position:fixed;
  top:var(--topbar-h);
  left:0;right:0;
  z-index:92;
  max-height:calc(100vh - var(--topbar-h));
  overflow-y:auto;
  overscroll-behavior:contain;
  padding:8px 16px 26px;
  background:var(--ink-moss);
  background-image:repeating-linear-gradient(180deg,rgba(245,242,233,.045) 0 1px,transparent 1px 44px);
  border-bottom:1px solid var(--line-on-ink);
  color:var(--paper);
  transform:translateY(-10px);
  opacity:0;
  visibility:hidden;
  transition:transform .24s var(--ease),opacity .2s var(--ease),visibility .24s var(--ease);
}
.drawer[data-open="true"]{
  transform:translateY(0);
  opacity:1;
  visibility:visible;
}
@media (min-width:1024px){.drawer{display:none}}

.drawer__list{display:flex;flex-direction:column;margin:0;padding:0;list-style:none}
.drawer__list>li+li{border-top:1px solid var(--line-on-ink)}
.drawer__link{
  display:flex;
  align-items:baseline;
  gap:14px;
  padding:15px 4px;
  color:var(--ink-1);
  font-size:19px;
  font-weight:700;
  line-height:1.4;
  transition:color .18s var(--ease),padding-left .18s var(--ease);
}
.drawer__link:hover,.drawer__link:focus-visible{color:var(--paper);padding-left:10px}
.drawer__index{
  font-family:var(--font-mono);
  font-size:11px;
  font-weight:400;
  letter-spacing:.1em;
  color:var(--fluoro);
  flex:0 0 auto;
}
.drawer__label{min-width:0}
.drawer__link[aria-current="page"]{color:var(--paper)}
.drawer__link[aria-current="page"] .drawer__index{color:var(--signal)}
.drawer__link[aria-current="page"] .drawer__label{
  text-decoration:underline;
  text-decoration-color:var(--signal);
  text-decoration-thickness:2px;
  text-underline-offset:6px;
}
.drawer__foot{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:12px;
  margin-top:18px;
  padding-top:16px;
  border-top:1px solid var(--line-on-ink);
}
.drawer__tagline{
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.1em;
  color:var(--ink-3);
  margin:0;
}

/* ---------- 6. 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:.02em;
  text-decoration:none;
  border:1px solid transparent;
  border-radius:2px;
  cursor:pointer;
  transition:background-color .18s var(--ease),color .18s var(--ease),border-color .18s var(--ease),transform .18s var(--ease);
}
.btn:hover{transform:translateY(-1px)}
.btn--signal{background:var(--signal);border-color:var(--signal);color:#14100D}
.btn--signal:hover{background:var(--signal-soft);border-color:var(--signal-soft);color:#14100D}
.btn--ghost{background:transparent;border-color:var(--line-on-paper);color:var(--ink-moss)}
.btn--ghost:hover{border-color:var(--ink-moss);background:rgba(11,43,35,.045);color:var(--ink-moss)}
.btn--quiet{background:var(--ink-moss);border-color:var(--ink-moss);color:var(--paper)}
.btn--quiet:hover{background:var(--deep-fern);border-color:var(--deep-fern);color:var(--paper)}
.btn--onink{background:transparent;border-color:var(--line-on-ink);color:var(--paper)}
.btn--onink:hover{border-color:var(--fluoro);color:var(--fluoro)}
.btn--mono{
  font-family:var(--font-mono);
  font-size:12px;
  font-weight:400;
  letter-spacing:.1em;
  padding:8px 14px;
}

/* ---------- 7. Layout containers ---------- */
.container{
  width:100%;
  max-width:var(--measure);
  margin-inline:auto;
  padding-inline:var(--shell-pad);
}
.container--narrow{max-width:820px}
.container--wide{max-width:1400px}

.grid{display:grid;gap:clamp(20px,3vw,36px)}
.grid--split{grid-template-columns:1fr}
.grid--halves{grid-template-columns:1fr}
.grid--thirds{grid-template-columns:1fr}
@media (min-width:900px){
  .grid--split{grid-template-columns:minmax(0,7fr) minmax(0,4fr);column-gap:clamp(28px,8.33%,96px)}
  .grid--halves{grid-template-columns:repeat(2,minmax(0,1fr))}
  .grid--thirds{grid-template-columns:repeat(3,minmax(0,1fr))}
}

/* ---------- 8. Chapter mark / kicker / tags ---------- */
.chapter-mark{
  display:flex;
  align-items:flex-start;
  gap:12px;
  margin-bottom:18px;
}
.chapter-mark__num{
  font-family:var(--font-mono);
  font-size:12px;
  font-weight:400;
  letter-spacing:.16em;
  color:var(--terracotta);
  line-height:1.2;
  padding-top:2px;
}
.chapter-mark__label{
  writing-mode:vertical-rl;
  text-orientation:upright;
  font-size:12px;
  letter-spacing:.3em;
  line-height:1.2;
  color:var(--rock);
}

.kicker{
  display:inline-flex;
  align-items:center;
  gap:10px;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.24em;
  text-transform:uppercase;
  color:var(--rock);
}
.kicker::before{
  content:"";
  width:22px;
  height:1px;
  background:var(--signal);
  flex:0 0 auto;
}

.tag{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:3px 9px;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.1em;
  line-height:1.6;
  color:var(--deep-fern);
  border:1px solid var(--line-on-paper);
  border-radius:2px;
  background:transparent;
  white-space:nowrap;
}
.tag--fluoro{background:var(--fluoro);border-color:var(--fluoro);color:var(--ink-moss)}
.tag--signal{background:var(--signal);border-color:var(--signal);color:#14100D}
.tag--rock{color:var(--rock);border-color:rgba(110,123,118,.4)}

.mono{
  font-family:var(--font-mono);
  font-size:13px;
  letter-spacing:.02em;
  color:var(--deep-fern);
}

/* ---------- 9. Breadcrumb ---------- */
.breadcrumb{
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.06em;
  color:var(--rock);
}
.breadcrumb__list{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px;
  margin:0;
  padding:0;
  list-style:none;
}
.breadcrumb__item{display:inline-flex;align-items:center;gap:8px}
.breadcrumb__link{
  color:var(--deep-fern);
  text-decoration:none;
  border-bottom:1px solid transparent;
  transition:border-color .18s var(--ease),color .18s var(--ease);
}
.breadcrumb__link:hover{border-color:var(--fluoro);color:var(--ink-moss)}
.breadcrumb__sep{color:var(--line-on-paper);user-select:none}
.breadcrumb__item[aria-current="page"]{color:var(--rock)}

/* ---------- 10. Surfaces / decoration ---------- */
.blueprint{position:relative;isolation:isolate}
.blueprint::before{
  content:"";
  position:absolute;
  inset:0;
  z-index:-1;
  pointer-events:none;
  background-image:
    linear-gradient(to right,rgba(11,43,35,.09) 1px,transparent 1px),
    linear-gradient(to bottom,rgba(11,43,35,.09) 1px,transparent 1px);
  background-size:64px 64px;
  background-position:-1px -1px;
}
.blueprint--ink::before{
  background-image:
    linear-gradient(to right,rgba(245,242,233,.09) 1px,transparent 1px),
    linear-gradient(to bottom,rgba(245,242,233,.09) 1px,transparent 1px);
}
.grain{position:relative}
.grain::after{
  content:"";
  position:absolute;
  inset:0;
  pointer-events:none;
  opacity:.04;
  background-image:
    radial-gradient(rgba(11,43,35,.9) .5px,transparent .5px),
    radial-gradient(rgba(11,43,35,.6) .5px,transparent .5px);
  background-size:3px 3px,7px 7px;
  background-position:0 0,2px 3px;
}

/* ---------- 11. Media frames ---------- */
.media-frame{
  position:relative;
  display:block;
  width:100%;
  overflow:hidden;
  border:1px solid var(--line-on-paper);
  border-radius:2px;
  background:var(--mist);
}
.media-frame>img,.media-frame>svg{display:block;width:100%;height:auto}
.media-frame--16x9{aspect-ratio:16/9}
.media-frame--4x3{aspect-ratio:4/3}
.media-frame--1x1{aspect-ratio:1/1}
.media-frame--2x1{aspect-ratio:2/1}
.media-frame__caption{
  margin-top:10px;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.08em;
  color:var(--rock);
}
.media-frame__placeholder{
  position:absolute;
  inset:0;
  display:grid;
  place-items:center;
  padding:14px;
  text-align:center;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.2em;
  color:var(--rock);
  background-image:repeating-linear-gradient(135deg,rgba(11,43,35,.06) 0 1px,transparent 1px 11px);
}
.media-frame--onink{border-color:var(--line-on-ink);background:rgba(245,242,233,.05)}
.media-frame--onink .media-frame__placeholder{color:var(--ink-3)}

/* ---------- 12. Fold panel ---------- */
.fold{border-top:1px solid var(--line-on-paper)}
.fold:last-of-type{border-bottom:1px solid var(--line-on-paper)}
.fold__head{
  display:flex;
  width:100%;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  padding:18px 0;
  background:none;
  border:0;
  text-align:left;
  cursor:pointer;
  color:var(--ink-moss);
}
.fold__title{
  font-family:var(--font-display);
  font-size:19px;
  font-weight:900;
  letter-spacing:-.01em;
  line-height:1.4;
}
.fold__icon{
  position:relative;
  flex:0 0 auto;
  width:14px;
  height:14px;
  border-right:1.5px solid var(--rock);
  border-bottom:1.5px solid var(--rock);
  transform:rotate(45deg);
  transition:transform .22s var(--ease),border-color .18s var(--ease);
}
.fold[data-open="true"] .fold__icon{
  transform:rotate(-135deg);
  border-color:var(--signal);
}
.fold__head:hover .fold__icon{border-color:var(--deep-fern)}
.fold__body{
  display:grid;
  grid-template-rows:0fr;
  transition:grid-template-rows .22s var(--ease);
}
.fold[data-open="true"] .fold__body{grid-template-rows:1fr}
.fold__inner{
  overflow:hidden;
  min-height:0;
  visibility:hidden;
  transition:visibility .22s var(--ease);
}
.fold[data-open="true"] .fold__inner{visibility:visible}
.fold__inner>*{margin-bottom:16px}
.fold__inner>*:last-child{margin-bottom:22px}

/* ---------- 13. Reveal ---------- */
[data-reveal]{
  opacity:0;
  transform:translateY(14px);
  transition:opacity .42s var(--ease),transform .42s var(--ease);
}
[data-reveal].is-in{opacity:1;transform:none}

/* ---------- 14. Back to top ---------- */
.to-top{
  position:fixed;
  right:clamp(14px,2.5vw,28px);
  bottom:clamp(14px,2.5vw,28px);
  z-index:70;
  width:50px;height:50px;
  display:grid;
  place-items:center;
  padding:0;
  border:1px solid var(--line-on-paper);
  border-radius:50%;
  background:rgba(245,242,233,.94);
  color:var(--ink-moss);
  cursor:pointer;
  opacity:0;
  visibility:hidden;
  transform:translateY(12px);
  transition:opacity .24s var(--ease),transform .24s var(--ease),visibility .24s var(--ease);
}
.to-top[data-visible="true"]{opacity:1;visibility:visible;transform:none}
.to-top::before{
  content:"";
  position:absolute;
  inset:-3px;
  border-radius:50%;
  pointer-events:none;
  background:conic-gradient(var(--signal) calc(var(--doc-progress,0) * 360deg),rgba(11,43,35,.12) 0);
  -webkit-mask:radial-gradient(farthest-side,transparent calc(100% - 3px),#000 calc(100% - 3px));
  mask:radial-gradient(farthest-side,transparent calc(100% - 3px),#000 calc(100% - 3px));
}
.to-top:hover{border-color:var(--ink-moss)}
.to-top__arrow{
  width:9px;height:9px;
  border-top:2px solid currentColor;
  border-left:2px solid currentColor;
  transform:rotate(45deg) translate(2px,2px);
}

/* ---------- 15. Footer ---------- */
.site-footer{
  position:relative;
  margin-top:clamp(48px,8vw,96px);
  padding:clamp(40px,6vw,78px) var(--shell-pad) 26px;
  background:var(--ink-moss);
  background-image:repeating-linear-gradient(90deg,rgba(245,242,233,.05) 0 1px,transparent 1px 96px);
  border-top:1px solid rgba(245,242,233,.14);
  color:var(--ink-2);
}
.site-footer a{text-decoration:none}

.footer__top{
  max-width:var(--measure);
  margin-inline:auto;
  display:grid;
  gap:clamp(32px,5vw,48px);
  grid-template-columns:1fr;
}
@media (min-width:900px){
  .footer__top{grid-template-columns:minmax(190px,1fr) minmax(0,2.1fr) minmax(250px,1.25fr);gap:clamp(28px,4vw,56px)}
}

.footer__brand{display:flex;flex-direction:column;gap:10px}
.footer__mark{
  display:inline-flex;
  align-items:center;
  gap:9px;
  color:var(--paper);
  align-self:flex-start;
}
.footer__dot{
  width:9px;height:9px;border-radius:50%;
  background:var(--signal);
  flex:0 0 auto;
  box-shadow:0 0 0 4px rgba(255,107,44,.15);
}
.footer__wordmark{
  font-family:var(--font-mono);
  font-size:10px;
  letter-spacing:.26em;
  color:var(--fluoro);
  text-transform:uppercase;
}
.footer__name{
  font-family:var(--font-display);
  font-weight:900;
  font-size:24px;
  letter-spacing:.01em;
  line-height:1.2;
  color:var(--paper);
  margin-top:4px;
}
.footer__tagline{
  font-size:13px;
  line-height:1.7;
  color:var(--ink-3);
  margin:0;
}

.footer__grid{display:grid;gap:clamp(24px,3vw,32px);grid-template-columns:1fr}
@media (min-width:560px){.footer__grid{grid-template-columns:repeat(3,minmax(0,1fr))}}

.footer__col{border-top:1px solid var(--line-on-ink);padding-top:14px}
.footer__col-index{
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.16em;
  color:var(--terracotta);
  margin:0 0 6px;
}
.footer__col-title{
  font-family:var(--font-body);
  font-size:14px;
  font-weight:700;
  letter-spacing:.1em;
  color:var(--paper);
  margin:0 0 14px;
}
.footer__links{display:flex;flex-direction:column;gap:9px;margin:0;padding:0;list-style:none}
.footer__link{
  display:inline-block;
  font-size:14px;
  line-height:1.7;
  color:var(--ink-1);
  border-bottom:1px solid transparent;
  transition:color .18s var(--ease),border-color .18s var(--ease);
}
.footer__link:hover,.footer__link:focus-visible{color:var(--paper);border-bottom-color:var(--fluoro)}

.footer__contact{
  padding:18px;
  border:1px solid var(--line-on-ink);
  border-radius:2px;
  background:rgba(245,242,233,.035);
}
.footer__contact-title{
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.2em;
  color:var(--fluoro);
  margin:0 0 6px;
}
.footer__contact-row{
  display:flex;
  flex-direction:column;
  gap:2px;
  padding:10px 0;
  border-bottom:1px dashed rgba(245,242,233,.14);
}
.footer__contact-row:last-of-type{border-bottom:0}
.footer__contact-label{
  font-size:11px;
  letter-spacing:.16em;
  color:var(--ink-3);
}
.footer__contact-value{
  font-family:var(--font-mono);
  font-size:12.5px;
  line-height:1.65;
  letter-spacing:.01em;
  color:var(--paper);
  word-break:break-word;
}
.footer__note{
  margin:12px 0 0;
  font-size:12px;
  line-height:1.7;
  color:var(--ink-3);
}

.footer__bottom{
  max-width:var(--measure);
  margin:clamp(30px,5vw,52px) auto 0;
  padding-top:18px;
  border-top:1px solid var(--line-on-ink);
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px 26px;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.04em;
  color:var(--ink-3);
}
.footer__legal,.footer__update,.footer__copy{margin:0}
.footer__copy{color:var(--ink-2)}

.footer__signature{
  max-width:var(--measure);
  margin:18px auto 0;
  padding-left:12px;
  border-left:2px solid var(--terracotta);
  font-size:12px;
  line-height:1.7;
  letter-spacing:.06em;
  color:var(--ink-3);
}

/* ---------- 16. Motion / a11y ---------- */
@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}
  .fold__body{transition:none}
}

/* ---------- 17. Print ---------- */
@media print{
  .rail,.topbar,.drawer,.to-top,.skip-link{display:none !important}
  body{padding:0;background:#fff;color:#000}
  .site-footer{background:#fff;color:#000;border-top:1px solid #000}
  .footer__contact,.footer__col{border-color:#999}
  .footer__link,.footer__contact-value,.footer__wordmark,.footer__contact-title{color:#000}
}