/* ==========================================================================
   龙珠CN中文主页 · 共享层  /assets/site.css
   轨道侧边导航 + 星珠圆形母题 + 墨黑/宣纸白 + 龙珠橙锚点
   ========================================================================== */

:root{
  --ink-900:#101114;
  --ink-700:#2C2F36;
  --paper-0:#FBFAF7;
  --paper-1:#F2EFE9;
  --orange:#FF6B1A;
  --orange-deep:#B23C07;
  --green:#1F9D6B;
  --green-deep:#12734B;
  --gold:#F5B731;
  --blue:#2F6DF6;
  --line-200:#DCD8D0;
  --veil-ink:rgba(16,17,20,.72);
  --muted:#75787F;

  --rail-w:112px;
  --topbar-h:64px;
  --wrap:1180px;
  --gut:clamp(20px,4vw,64px);

  --r-s:6px;
  --r-m:14px;
  --r-l:28px;
  --r-full:999px;

  --shadow-1:0 1px 2px rgba(16,17,20,.05), 0 10px 26px rgba(16,17,20,.05);
  --shadow-2:0 2px 6px rgba(16,17,20,.06), 0 22px 48px rgba(16,17,20,.08);

  --font-head:"Source Han Sans SC","Noto Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  --font-body:"Source Han Sans SC","Noto Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;

  --ease:cubic-bezier(.22,.61,.36,1);
  --t-fast:180ms;
  --t-mid:320ms;
}

/* ---------------------------------- reset -------------------------------- */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body,h1,h2,h3,h4,h5,p,ul,ol,li,figure,blockquote,dl,dd,fieldset{margin:0}
ul,ol{padding:0;list-style:none}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
img,svg{display:block;max-width:100%}
[hidden]{display:none !important}
:focus-visible{outline:2px solid var(--blue);outline-offset:3px;border-radius:var(--r-s)}

/* ----------------------------------- base -------------------------------- */
html{scroll-behavior:smooth}
body{
  min-height:100vh;
  background:var(--paper-0);
  color:var(--ink-700);
  font-family:var(--font-body);
  font-size:17px;
  line-height:1.75;
  letter-spacing:.02em;
  font-variant-numeric:tabular-nums;
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4{
  font-family:var(--font-head);
  font-weight:900;
  color:var(--ink-900);
  line-height:1.15;
  letter-spacing:-.01em;
}
h1{font-size:clamp(34px,5.4vw,64px)}
h2{font-size:clamp(26px,3.4vw,40px)}
h3{font-size:clamp(19px,2vw,24px)}
h4{font-size:18px}
p{max-width:72ch}
strong{font-weight:800;color:var(--ink-900)}
::selection{background:var(--gold);color:var(--ink-900)}

@media (min-width:900px){ body{padding-left:var(--rail-w)} }
@media (max-width:899px){ body{padding-top:var(--topbar-h)} }

.page-main{display:block}
#main-content:focus{outline:none}

/* --------------------------------- skip link ------------------------------ */
.skip-link{
  position:fixed;
  top:10px;left:10px;
  z-index:200;
  padding:10px 18px;
  border-radius:var(--r-full);
  background:var(--ink-900);
  color:var(--paper-0);
  font-size:14px;font-weight:700;
  transform:translateY(-180%);
  transition:transform var(--t-fast) var(--ease);
}
.skip-link:focus,
.skip-link:focus-visible{transform:translateY(0)}

.sr-only{
  position:absolute;width:1px;height:1px;padding:0;margin:-1px;
  overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0;
}

/* --------------------------------- layout -------------------------------- */
.wrap{
  width:100%;
  max-width:var(--wrap);
  margin-inline:auto;
  padding-inline:var(--gut);
}
.wrap--wide{max-width:1440px}

.section{padding-block:clamp(56px,7vw,120px)}
.section--tight{padding-block:clamp(36px,4.5vw,64px)}
.section--paper{background:var(--paper-1)}
.section--ink{background:var(--ink-900);color:rgba(251,250,247,.78)}
.section--ink h1,.section--ink h2,.section--ink h3,.section--ink h4{color:var(--paper-0)}

.lead{font-size:clamp(17px,1.4vw,19px);line-height:1.85;color:var(--ink-700);max-width:64ch}
.text-muted{color:var(--muted)}
.energy-line{
  height:2px;width:100%;border-radius:2px;
  background:linear-gradient(90deg,var(--orange),var(--gold) 32%,var(--green) 66%,var(--blue));
  opacity:.85;
}
.orbit-deco{
  position:absolute;border-radius:50%;
  border:1px dashed var(--line-200);
  pointer-events:none;
}
.eyebrow{
  display:inline-flex;align-items:center;gap:6px;
  font-size:13px;font-weight:700;letter-spacing:.14em;
  color:var(--orange-deep);text-transform:uppercase;
}
.eyebrow::before{content:"[";color:var(--line-200)}
.eyebrow::after{content:"]";color:var(--line-200)}

/* -------------------------------- buttons -------------------------------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:13px 26px;
  border-radius:var(--r-full);
  border:1px solid transparent;
  font-family:var(--font-head);
  font-weight:800;font-size:15px;letter-spacing:.02em;
  cursor:pointer;
  transition:transform var(--t-fast) var(--ease),
             background var(--t-fast) var(--ease),
             color var(--t-fast) var(--ease),
             border-color var(--t-fast) var(--ease),
             box-shadow var(--t-fast) var(--ease);
}
.btn--primary{background:var(--orange);color:var(--ink-900);box-shadow:0 8px 22px rgba(255,107,26,.28)}
.btn--primary:hover{background:#ff7f39;transform:translateY(-2px);box-shadow:0 14px 30px rgba(255,107,26,.36)}
.btn--ink{background:var(--ink-900);color:var(--paper-0)}
.btn--ink:hover{background:var(--ink-700);transform:translateY(-2px)}
.btn--ghost{background:transparent;color:var(--ink-900);border-color:var(--line-200)}
.btn--ghost:hover{border-color:var(--orange);color:var(--orange-deep);transform:translateY(-2px)}
.btn--on-dark{background:transparent;color:var(--paper-0);border-color:rgba(251,250,247,.28)}
.btn--on-dark:hover{border-color:var(--gold);color:var(--gold);transform:translateY(-2px)}

/* ------------------------------- breadcrumb ------------------------------- */
.breadcrumb{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px;
  margin-bottom:20px;
  font-size:13px;letter-spacing:.05em;color:var(--muted);
}
.breadcrumb a{
  color:var(--ink-700);
  border-bottom:1px solid var(--line-200);
  padding-bottom:1px;
  transition:color var(--t-fast) var(--ease),border-color var(--t-fast) var(--ease);
}
.breadcrumb a:hover{color:var(--orange-deep);border-color:var(--orange)}
.breadcrumb__sep{color:var(--line-200)}
.breadcrumb__current{color:var(--ink-900);font-weight:700}

/* ------------------------------ chapter number ---------------------------- */
.chapter{position:relative}
.chapter__num{
  display:block;
  font-family:var(--font-head);
  font-weight:900;
  font-size:clamp(56px,9vw,120px);
  line-height:.9;
  letter-spacing:-.03em;
  font-variant-numeric:tabular-nums;
  color:transparent;
  -webkit-text-stroke:1px var(--ink-900);
}
.chapter__num--solid{color:var(--orange);-webkit-text-stroke:1px var(--orange-deep)}

/* ---------------------------------- card --------------------------------- */
.card{
  position:relative;
  padding:clamp(20px,2.4vw,30px);
  background:var(--paper-0);
  border:1px solid var(--line-200);
  border-radius:var(--r-m);
  box-shadow:var(--shadow-1);
  transition:border-color var(--t-fast) var(--ease),
             transform var(--t-fast) var(--ease),
             box-shadow var(--t-fast) var(--ease);
}
.card:hover{border-color:var(--orange);transform:translateY(-2px);box-shadow:var(--shadow-2)}
.card--paper{background:var(--paper-1)}
.card--ink{background:var(--ink-900);border-color:rgba(251,250,247,.12);color:rgba(251,250,247,.76)}
.card--ink h3,.card--ink h4{color:var(--paper-0)}
.card--ink:hover{border-color:var(--gold)}
.card__title{font-size:clamp(19px,2vw,23px);margin-bottom:10px}
.card__meta{
  font-size:12.5px;font-weight:600;letter-spacing:.1em;
  text-transform:uppercase;color:var(--muted);
}

/* ---------------------------------- media -------------------------------- */
.media{
  position:relative;
  overflow:hidden;
  border:1px solid var(--line-200);
  border-radius:var(--r-m);
  aspect-ratio:16/10;
  background:
    radial-gradient(circle at 74% 20%,rgba(245,183,49,.20),transparent 58%),
    linear-gradient(160deg,var(--paper-1),#E6E1D7);
}
.media > img{width:100%;height:100%;object-fit:cover}
.media--orb{border-radius:50%;aspect-ratio:1/1}
.media--wide{aspect-ratio:21/9}
.media--tall{aspect-ratio:3/4}
.media--placeholder::before{
  content:"";
  position:absolute;inset:0;
  background-image:radial-gradient(circle,rgba(16,17,20,.16) 1px,transparent 1.4px);
  background-size:14px 14px;
  opacity:.5;
}
.media__badge{
  position:absolute;top:14px;left:14px;
  display:inline-flex;align-items:center;gap:6px;
  padding:5px 12px;border-radius:var(--r-full);
  background:var(--ink-900);color:var(--paper-0);
  font-size:12px;font-weight:700;letter-spacing:.06em;
}
.media__caption{
  position:absolute;left:0;right:0;bottom:0;
  padding:34px 18px 14px;
  background:linear-gradient(to top,var(--veil-ink),rgba(16,17,20,0));
  color:var(--paper-0);
  font-size:13.5px;line-height:1.6;letter-spacing:.02em;
}
.media__orbit{
  position:absolute;right:-14%;bottom:-26%;
  width:64%;aspect-ratio:1/1;border-radius:50%;
  border:1px dashed rgba(251,250,247,.5);
  pointer-events:none;
}

/* -------------------------------- accordion ------------------------------- */
.accordion{border-top:1px solid var(--line-200)}
.accordion__item{
  position:relative;
  border-bottom:1px solid var(--line-200);
  transition:padding-left var(--t-mid) var(--ease);
}
.accordion__item::before{
  content:"";
  position:absolute;left:0;top:0;bottom:0;width:2px;
  background:var(--orange);
  transform:scaleY(0);transform-origin:top;
  transition:transform var(--t-mid) var(--ease);
}
.accordion__item[data-open]{padding-left:18px}
.accordion__item[data-open]::before{transform:scaleY(1)}
.accordion__trigger{
  width:100%;
  display:flex;align-items:center;gap:16px;
  padding:20px 4px;
  text-align:left;
  font-family:var(--font-head);
  font-weight:800;
  font-size:clamp(16px,1.6vw,18px);
  color:var(--ink-900);
  transition:color var(--t-fast) var(--ease);
}
.accordion__trigger:hover{color:var(--orange-deep)}
.accordion__star{
  flex:0 0 auto;
  width:24px;height:24px;border-radius:50%;
  display:grid;place-items:center;
  border:1px solid var(--line-200);
  background:var(--paper-0);
  font-size:11.5px;font-weight:700;color:var(--ink-900);
  transition:transform var(--t-mid) var(--ease),
             background var(--t-fast) var(--ease),
             border-color var(--t-fast) var(--ease);
}
.accordion__item[data-open] .accordion__star{
  transform:rotate(90deg);
  background:var(--orange);border-color:var(--orange);color:var(--ink-900);
}
.accordion__body{
  height:0;overflow:hidden;opacity:0;
  transition:height 240ms var(--ease),opacity 240ms var(--ease);
}
.accordion__item[data-open] .accordion__body{opacity:1}
.accordion__body > div{
  padding:0 4px 24px 40px;
  max-width:70ch;
  font-size:16.5px;line-height:1.85;color:var(--ink-700);
}

/* ---------------------------------- tags --------------------------------- */
.tag{
  display:inline-flex;align-items:center;gap:6px;
  padding:6px 14px;
  border-radius:var(--r-full);
  border:1px solid var(--line-200);
  background:var(--paper-0);
  font-size:12.5px;font-weight:700;letter-spacing:.04em;
  color:var(--ink-700);
  transition:background var(--t-fast) var(--ease),
             color var(--t-fast) var(--ease),
             border-color var(--t-fast) var(--ease);
}
.tag:hover{border-color:var(--orange);color:var(--orange-deep)}
.tag[aria-pressed="true"]{background:var(--ink-900);border-color:var(--ink-900);color:var(--paper-0)}

/* --------------------------------- reveal -------------------------------- */
.has-js [data-reveal]{
  opacity:0;
  transform:translateY(12px) scale(.98);
  transition:opacity 480ms var(--ease),transform 480ms var(--ease);
}
.has-js [data-reveal].is-visible{opacity:1;transform:none}

/* ================================ HEADER ================================= */
.site-header{
  position:fixed;
  top:0;left:0;bottom:0;
  width:var(--rail-w);
  z-index:80;
  background:var(--paper-0);
  border-right:1px solid var(--line-200);
}
.rail{
  position:relative;
  height:100%;
  display:flex;flex-direction:column;align-items:center;
  gap:16px;
  padding:22px 10px 18px;
  overflow-y:auto;overflow-x:hidden;
  scrollbar-width:none;
}
.rail::-webkit-scrollbar{display:none}

.rail__brand{
  display:flex;flex-direction:column;align-items:center;gap:8px;
  text-align:center;
  padding:2px;
  border-radius:var(--r-m);
}
.rail__orbmark{
  width:48px;height:48px;
  display:grid;grid-template-columns:repeat(2,1fr);gap:5px;
  place-items:center;padding:9px;
  border-radius:50%;
  background:radial-gradient(circle at 32% 26%,#FFB877 0%,var(--orange) 52%,var(--orange-deep) 100%);
  box-shadow:0 6px 18px rgba(255,107,26,.32),inset 0 -2px 6px rgba(16,17,20,.18);
  transition:transform var(--t-mid) var(--ease),box-shadow var(--t-mid) var(--ease);
}
.rail__brand:hover .rail__orbmark{
  transform:translateY(-2px) rotate(-8deg);
  box-shadow:0 12px 26px rgba(255,107,26,.42);
}
.rail__star{width:6px;height:6px;border-radius:50%;background:var(--ink-900)}
.rail__brandline{
  font-family:var(--font-head);
  font-weight:900;font-size:13px;letter-spacing:.06em;
  color:var(--ink-900);
}
.rail__tagline{font-size:10px;line-height:1.4;letter-spacing:.04em;color:var(--muted)}

.rail__toggle{
  display:none;
  align-items:center;gap:9px;
  padding:8px 14px;
  border:1px solid var(--line-200);
  border-radius:var(--r-full);
  background:var(--paper-0);
  font-size:13px;font-weight:700;color:var(--ink-900);
}
.rail__toggle-bars{display:inline-grid;gap:3px;width:14px}
.rail__toggle-bars i{display:block;height:2px;border-radius:2px;background:currentColor;
  transition:transform var(--t-fast) var(--ease),opacity var(--t-fast) var(--ease)}
.site-header[data-open] .rail__toggle-bars i:first-child{transform:translateY(5px) rotate(45deg)}
.site-header[data-open] .rail__toggle-bars i:nth-child(2){opacity:0}
.site-header[data-open] .rail__toggle-bars i:last-child{transform:translateY(-5px) rotate(-45deg)}
.rail__toggle-text{white-space:nowrap}

.rail__nav{
  display:flex;flex-direction:column;align-items:center;
  gap:10px;
  width:100%;
  flex:1 1 auto;
  min-height:0;
}
.rail__hint{
  max-width:84px;
  margin-bottom:2px;
  text-align:center;
  font-size:10px;line-height:1.5;letter-spacing:.06em;
  color:var(--muted);
}
.rail__list{display:flex;flex-direction:column;gap:6px;width:100%}
.rail__item{width:100%}
.rail__link{
  position:relative;
  display:flex;flex-direction:column;align-items:center;gap:6px;
  padding:9px 4px;
  border:1px solid transparent;
  border-radius:var(--r-m);
  transition:background var(--t-fast) var(--ease),
             border-color var(--t-fast) var(--ease),
             transform var(--t-fast) var(--ease);
}
.rail__link::before{
  content:"";
  position:absolute;left:-10px;top:50%;
  width:3px;height:0;
  border-radius:0 3px 3px 0;
  background:var(--orange);
  transform:translateY(-50%);
  transition:height var(--t-mid) var(--ease),background var(--t-fast) var(--ease);
}
.rail__link:hover{background:var(--paper-1);border-color:var(--line-200);transform:translateY(-2px)}
.rail__link:hover::before{height:28px}
.rail__orb{
  width:26px;height:26px;border-radius:50%;
  display:grid;place-items:center;
  border:1px solid var(--line-200);
  background:var(--paper-0);
  font-size:12px;font-weight:700;color:var(--ink-900);
  transition:background var(--t-fast) var(--ease),
             color var(--t-fast) var(--ease),
             border-color var(--t-fast) var(--ease),
             transform var(--t-fast) var(--ease);
}
.rail__label{
  font-size:12px;font-weight:600;line-height:1.2;letter-spacing:.02em;
  color:var(--ink-700);
  transition:color var(--t-fast) var(--ease);
}
.rail__link[aria-current="page"]{background:var(--paper-1);border-color:var(--line-200)}
.rail__link[aria-current="page"]::before{height:36px}
.rail__link[aria-current="page"] .rail__orb{
  background:var(--orange);border-color:var(--orange);color:var(--ink-900);
  box-shadow:0 4px 12px rgba(255,107,26,.35);
}
.rail__link[aria-current="page"] .rail__label{color:var(--ink-900);font-weight:800}

.rail__cta{
  display:block;width:100%;
  margin-top:auto;
  padding:11px 6px;
  border-radius:var(--r-full);
  background:var(--ink-900);color:var(--paper-0);
  text-align:center;
  font-size:11.5px;font-weight:700;line-height:1.35;letter-spacing:.02em;
  transition:background var(--t-fast) var(--ease),
             color var(--t-fast) var(--ease),
             transform var(--t-fast) var(--ease),
             box-shadow var(--t-fast) var(--ease);
}
.rail__cta:hover{
  background:var(--orange);color:var(--ink-900);
  transform:translateY(-2px);
  box-shadow:0 10px 24px rgba(255,107,26,.32);
}
.rail__note{
  max-width:88px;
  text-align:center;
  font-size:9.5px;line-height:1.5;letter-spacing:.02em;
  color:var(--muted);
}
.rail__top{
  width:32px;height:32px;border-radius:50%;
  display:grid;place-items:center;
  border:1px solid var(--line-200);
  background:var(--paper-0);
  color:var(--ink-900);
  font-size:14px;line-height:1;
  transition:border-color var(--t-fast) var(--ease),
             background var(--t-fast) var(--ease),
             transform var(--t-fast) var(--ease);
}
.rail__top:hover{border-color:var(--orange);background:var(--paper-1);transform:translateY(-2px)}

.rail__progress{
  position:absolute;
  top:0;right:-1px;bottom:0;
  width:2px;
  background:linear-gradient(to bottom,rgba(220,216,208,.9),rgba(220,216,208,.15));
  pointer-events:none;
}
.rail__progress-fill{
  display:block;width:100%;
  height:var(--scroll-progress,0%);
  background:linear-gradient(to bottom,var(--gold),var(--orange) 45%,var(--green));
  box-shadow:0 0 10px rgba(255,107,26,.5);
  transition:height 120ms linear;
}

/* ================================ FOOTER ================================= */
.site-footer{
  position:relative;
  margin-top:clamp(64px,8vw,120px);
  background:var(--ink-900);
  color:rgba(251,250,247,.74);
  overflow:hidden;
}
.footer__beam{
  position:absolute;top:0;left:0;right:0;height:3px;
  background:linear-gradient(90deg,var(--orange),var(--gold) 32%,var(--green) 66%,var(--blue));
  opacity:.9;
}
.footer__glow{
  position:absolute;top:-220px;right:-160px;
  width:560px;height:560px;border-radius:50%;
  background:radial-gradient(circle,rgba(255,107,26,.16),rgba(255,107,26,0) 62%);
  pointer-events:none;
}
.footer__ring{
  position:absolute;top:-240px;right:-170px;
  width:600px;height:600px;border-radius:50%;
  border:1px dashed rgba(245,183,49,.30);
  animation:footer-orbit 56s linear infinite;
  pointer-events:none;
}
@keyframes footer-orbit{from{transform:rotate(0)}to{transform:rotate(360deg)}}

.footer__wrap{
  position:relative;z-index:1;
  width:100%;max-width:var(--wrap);
  margin-inline:auto;
  padding:clamp(48px,6vw,84px) var(--gut) clamp(30px,4vw,48px);
  display:grid;
  grid-template-columns:minmax(240px,1fr) 2fr;
  gap:clamp(32px,4vw,64px);
}
.footer__lead{display:flex;flex-direction:column;align-items:flex-start}
.footer__eyebrow{
  margin-bottom:14px;
  font-size:12px;font-weight:700;letter-spacing:.16em;
  color:var(--gold);
}
.footer__brand{
  font-family:var(--font-head);
  font-weight:900;
  font-size:clamp(22px,2.4vw,30px);
  letter-spacing:.02em;
  color:var(--paper-0);
}
.footer__slogan{
  margin-top:10px;
  max-width:22ch;
  font-size:16px;line-height:1.75;
  color:rgba(251,250,247,.7);
}
.footer__lead .btn{margin-top:24px}

.footer__nav{
  display:grid;
  grid-template-columns:repeat(4,minmax(0,1fr));
  gap:28px 20px;
}
.footer__col{min-width:0}
.footer__col-title{
  margin-bottom:12px;padding-bottom:10px;
  border-bottom:1px solid rgba(251,250,247,.14);
  font-size:13px;font-weight:800;letter-spacing:.08em;
  color:var(--paper-0);
}
.footer__links{display:flex;flex-direction:column;gap:9px}
.footer__links a{
  display:inline-block;
  font-size:14.5px;
  color:rgba(251,250,247,.74);
  border-bottom:1px solid transparent;
  padding-bottom:2px;
  transition:color var(--t-fast) var(--ease),
             border-color var(--t-fast) var(--ease),
             transform var(--t-fast) var(--ease);
}
.footer__links a:hover{color:var(--gold);border-color:var(--gold);transform:translateX(2px)}

.footer__grid{
  position:relative;z-index:1;
  width:100%;max-width:var(--wrap);
  margin-inline:auto;
  padding:0 var(--gut) clamp(36px,5vw,56px);
  display:grid;
  grid-template-columns:minmax(0,1.55fr) minmax(0,1fr);
  gap:clamp(24px,3vw,48px);
}
.footer__block-title{
  display:flex;align-items:center;gap:10px;
  margin-bottom:14px;
  font-size:15px;font-weight:800;letter-spacing:.04em;
  color:var(--paper-0);
}
.footer__block-title::before{
  content:"";width:18px;height:2px;border-radius:2px;
  background:var(--orange);flex:0 0 auto;
}
.footer__notice p{
  max-width:62ch;
  font-size:15px;line-height:1.85;
  color:rgba(251,250,247,.68);
}
.footer__facts{display:flex;flex-direction:column;gap:11px}
.footer__facts li{
  display:grid;
  grid-template-columns:54px minmax(0,1fr);
  gap:12px;
  font-size:14.5px;line-height:1.7;
  color:rgba(251,250,247,.78);
  word-break:break-word;
}
.footer__key{
  padding-top:2px;
  font-size:12.5px;font-weight:700;letter-spacing:.08em;
  color:var(--gold);
}

.footer__base{
  position:relative;z-index:1;
  border-top:1px solid rgba(251,250,247,.14);
}
.footer__base-inner{
  width:100%;max-width:var(--wrap);
  margin-inline:auto;
  padding:20px var(--gut) 30px;
  display:flex;flex-wrap:wrap;align-items:center;gap:12px 24px;
  font-size:13px;
  color:rgba(251,250,247,.56);
}
.footer__filing{letter-spacing:.04em}
.footer__copy{letter-spacing:.02em}
.footer__top{
  margin-left:auto;
  padding:9px 18px;
  border:1px solid rgba(251,250,247,.22);
  border-radius:var(--r-full);
  color:var(--paper-0);
  font-size:13px;font-weight:600;
  transition:border-color var(--t-fast) var(--ease),
             background var(--t-fast) var(--ease),
             color var(--t-fast) var(--ease);
}
.footer__top:hover{border-color:var(--orange);background:var(--orange);color:var(--ink-900)}

/* ============================== RESPONSIVE =============================== */
@media (max-width:1100px){
  .footer__wrap{grid-template-columns:1fr}
  .footer__grid{grid-template-columns:1fr}
}
@media (max-width:720px){
  .footer__nav{grid-template-columns:repeat(2,minmax(0,1fr))}
  .footer__facts li{grid-template-columns:1fr;gap:2px}
  .footer__top{margin-left:0}
}

@media (max-width:899px){
  .site-header{
    right:0;bottom:auto;
    width:auto;height:var(--topbar-h);
    border-right:0;
    border-bottom:1px solid var(--line-200);
  }
  .rail{
    flex-direction:row;align-items:center;
    height:var(--topbar-h);
    gap:12px;
    padding:0 14px;
    overflow:visible;
  }
  .rail__brand{flex-direction:row;gap:10px;text-align:left;margin-right:auto;padding:0}
  .rail__orbmark{width:36px;height:36px;padding:7px;gap:4px}
  .rail__star{width:5px;height:5px}
  .rail__brandline{font-size:14px}
  .rail__tagline{display:none}
  .rail__toggle{display:inline-flex}
  .rail__note{display:none}
  .rail__top{display:none}

  .rail__nav{
    position:fixed;
    top:var(--topbar-h);left:0;right:0;
    width:auto;
    max-height:calc(100vh - var(--topbar-h));
    overflow-y:auto;
    flex-direction:column;align-items:stretch;
    gap:14px;
    padding:20px var(--gut) 28px;
    background:var(--paper-0);
    border-bottom:1px solid var(--line-200);
    box-shadow:0 26px 48px rgba(16,17,20,.12);
    z-index:70;
    opacity:0;
    visibility:hidden;
    pointer-events:none;
    transform:translateY(-14px);
    transition:opacity var(--t-mid) var(--ease),
               transform var(--t-mid) var(--ease),
               visibility var(--t-mid);
  }
  .site-header[data-open] .rail__nav{
    opacity:1;visibility:visible;pointer-events:auto;transform:translateY(0);
  }
  .rail__hint{max-width:none;margin:0;text-align:left;font-size:12px}
  .rail__list{gap:2px}
  .rail__link{
    flex-direction:row;justify-content:flex-start;gap:12px;
    padding:12px 14px;
  }
  .rail__link:hover{transform:none}
  .rail__link::before{
    left:0;top:8px;bottom:8px;width:3px;height:auto;
    transform:none;opacity:0;border-radius:0 3px 3px 0;
    transition:opacity var(--t-fast) var(--ease);
  }
  .rail__link:hover::before,
  .rail__link[aria-current="page"]::before{height:auto;opacity:1}
  .rail__orb{width:28px;height:28px;font-size:13px}
  .rail__label{font-size:15px}
  .rail__cta{
    margin-top:6px;
    padding:14px 8px;
    font-size:14px;
  }
  .rail__progress{
    top:auto;right:0;bottom:0;left:0;
    width:auto;height:2px;
    background:rgba(220,216,208,.6);
  }
  .rail__progress-fill{
    width:var(--scroll-progress,0%);
    height:100%;
    background:linear-gradient(90deg,var(--gold),var(--orange) 45%,var(--green));
    transition:width 120ms linear;
  }
}

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