/* ==========================================================================
   kingdom-junlin.com.cn — shared site kit (header / footer / base components)
   ========================================================================== */

/* 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,li,figure,blockquote,dl,dd{margin:0;padding:0}
ul,ol{list-style:none}
img,svg,video{display:block;max-width:100%}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
a{color:inherit;text-decoration:none}
table{border-collapse:collapse;width:100%}

/* 2. tokens --------------------------------------------------------------- */
:root{
  --ink:#0B0B0D;
  --ink-2:#14141A;
  --ink-3:#1C1C24;
  --gold:#C8A24A;
  --gold-bright:#F0D08A;
  --cinnabar:#C2402E;
  --jade:#4E8C86;
  --jade-deep:#2F5F5B;
  --ivory:#F5F1E8;
  --paper:#FBF8F2;
  --mist:#A9A9B0;

  --text:#E8E3D8;
  --text-soft:rgba(245,241,232,.76);
  --line:rgba(200,162,74,.24);
  --line-strong:rgba(200,162,74,.52);

  --f-display:"Songti SC","SimSun","Source Han Serif SC","Noto Serif SC",Georgia,"Times New Roman",serif;
  --f-body:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  --f-mono:"SFMono-Regular",Consolas,"Liberation Mono",Menlo,monospace;

  --fs-12:.75rem;
  --fs-14:.875rem;
  --fs-16:1rem;
  --fs-20:1.25rem;
  --fs-28:1.75rem;
  --fs-40:2.5rem;
  --fs-64:4rem;
  --fs-96:6rem;

  --w-max:1240px;
  --w-narrow:820px;
  --gutter:clamp(1.25rem,4vw,3.5rem);
  --ease:cubic-bezier(.22,.61,.36,1);
  --t-fast:120ms;
  --t-mid:240ms;
  --header-h:88px;
}

/* 3. base ----------------------------------------------------------------- */
body{
  min-height:100vh;
  background:var(--ink);
  color:var(--text);
  font-family:var(--f-body);
  font-size:17px;
  line-height:1.75;
  letter-spacing:.01em;
  overflow-x:hidden;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
h1,h2,h3,h4{font-family:var(--f-display);font-weight:700;line-height:1.18;letter-spacing:-.01em;color:var(--ivory)}
h1{font-size:clamp(2rem,5vw,var(--fs-64))}
h2{font-size:clamp(1.6rem,3.4vw,var(--fs-40))}
h3{font-size:clamp(1.15rem,2vw,var(--fs-28))}
p{max-width:68ch}
::selection{background:var(--gold);color:#14110B}

:focus-visible{outline:2px solid var(--gold-bright);outline-offset:3px;border-radius:1px}

.skip-link{
  position:absolute;left:var(--gutter);top:-5rem;z-index:200;
  padding:.7rem 1.2rem;background:var(--gold);color:#14110B;
  font-size:var(--fs-14);letter-spacing:.08em;
  transition:top var(--t-fast) var(--ease);
}
.skip-link:focus{top:.75rem}

#main-content{display:block}

/* 4. header --------------------------------------------------------------- */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(11,11,13,.94);
  border-bottom:1px solid var(--line);
  -webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);
}
.progress-rail{position:absolute;left:0;right:0;bottom:-1px;height:1px;background:rgba(200,162,74,.14);overflow:hidden}
.progress-bar{display:block;height:100%;width:0;background:linear-gradient(90deg,var(--gold),var(--gold-bright))}

.header-inner{
  width:100%;max-width:var(--w-max);margin:0 auto;
  padding:1rem var(--gutter);
  display:flex;align-items:center;
  gap:clamp(1rem,2.6vw,2.25rem);
}

.brand{display:flex;align-items:center;gap:.7rem;flex:0 0 auto}
.brand-mark{
  width:8px;height:36px;flex:0 0 auto;
  background:linear-gradient(180deg,var(--gold-bright),var(--gold) 55%,var(--cinnabar));
}
.brand-text{display:block}
.brand-name{
  display:block;font-family:var(--f-display);font-weight:700;
  font-size:var(--fs-20);letter-spacing:.08em;line-height:1.2;color:var(--ivory);
}
.brand-latin{
  display:block;margin-top:.15rem;
  font-size:var(--fs-12);letter-spacing:.18em;text-transform:lowercase;
  color:var(--mist);line-height:1.3;
}

.site-nav{margin-left:auto;display:block}
.nav-list{display:flex;align-items:center;gap:clamp(.5rem,1.4vw,1.35rem)}
.nav-list a{
  position:relative;display:inline-flex;align-items:baseline;gap:.4rem;
  padding:.6rem .2rem;font-size:var(--fs-14);color:var(--mist);
  transition:color var(--t-fast) var(--ease);
}
.nav-list a::after{
  content:"";position:absolute;left:0;right:0;bottom:.28rem;height:1px;
  background:var(--gold);transform:scaleX(0);transform-origin:left;
  transition:transform var(--t-fast) var(--ease);
}
.nav-list a:hover{color:var(--ivory)}
.nav-list a:hover::after{transform:scaleX(1)}
.nav-list a[aria-current="page"]{color:var(--gold-bright)}
.nav-list a[aria-current="page"] .nav-num{color:var(--gold-bright);opacity:1}
.nav-list a[aria-current="page"]::after{transform:scaleX(1);background:var(--gold-bright)}
.nav-num{font-family:var(--f-mono);font-size:11px;letter-spacing:.06em;color:var(--gold);opacity:.6}
.nav-label{white-space:nowrap}

.header-utility{display:flex;align-items:center;gap:.5rem;flex:0 0 auto}

.pill{
  display:inline-flex;align-items:center;gap:.45rem;
  padding:.5rem .9rem;border:1px solid var(--line-strong);border-radius:999px;
  font-size:var(--fs-12);letter-spacing:.08em;white-space:nowrap;
  color:var(--gold-bright);background:rgba(200,162,74,.05);
  transition:border-color var(--t-fast) var(--ease),background-color var(--t-fast) var(--ease),color var(--t-fast) var(--ease);
}
.pill::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--gold);flex:0 0 auto}
.pill-tag::before{background:var(--jade)}
.pill-lib::before{background:var(--cinnabar)}
.pill:hover,.pill:focus-visible{border-color:var(--gold-bright);background:rgba(200,162,74,.14);color:var(--ivory)}

@keyframes pill-breathe{
  0%,100%{box-shadow:0 0 0 0 rgba(200,162,74,0)}
  50%{box-shadow:0 0 0 3px rgba(200,162,74,.10)}
}
.pill--breathe{animation:pill-breathe 2.4s ease-in-out infinite}

.nav-toggle{
  display:none;align-items:center;gap:.55rem;
  padding:.5rem .7rem;border:1px solid var(--line);
  font-size:var(--fs-12);letter-spacing:.14em;color:var(--gold-bright);
}
.nav-toggle-bar{position:relative;display:block;width:18px;height:1px;background:currentColor;transition:background-color var(--t-fast) var(--ease)}
.nav-toggle-bar::before,.nav-toggle-bar::after{
  content:"";position:absolute;left:0;width:18px;height:1px;background:currentColor;
  transition:transform var(--t-mid) var(--ease);
}
.nav-toggle-bar::before{top:-5px}
.nav-toggle-bar::after{top:5px}
.nav-toggle[aria-expanded="true"] .nav-toggle-bar{background:transparent}
.nav-toggle[aria-expanded="true"] .nav-toggle-bar::before{transform:translateY(5px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] .nav-toggle-bar::after{transform:translateY(-5px) rotate(-45deg)}

/* 5. footer --------------------------------------------------------------- */
.site-footer{
  position:relative;margin-top:clamp(3.5rem,9vw,8rem);
  background:var(--ink-2);
  border-top:1px solid var(--line-strong);
}
.site-footer::before{
  content:"";position:absolute;top:0;left:0;right:0;height:1px;
  background:linear-gradient(90deg,transparent,var(--gold),transparent);
}
.footer-inner{width:100%;max-width:var(--w-max);margin:0 auto;padding:clamp(2.25rem,5vw,4rem) var(--gutter) 1.75rem}

.footer-head{
  display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;
  gap:1.5rem;padding-bottom:1.75rem;border-bottom:1px solid var(--line);
}
.footer-brand-name{font-family:var(--f-display);font-size:var(--fs-28);letter-spacing:.08em;color:var(--ivory);line-height:1.2}
.footer-brand-latin{margin-top:.3rem;font-size:var(--fs-12);letter-spacing:.18em;text-transform:lowercase;color:var(--mist)}
.footer-entries{display:flex;flex-wrap:wrap;gap:.5rem}

.footer-columns{
  display:grid;grid-template-columns:repeat(3,minmax(0,1fr));
  gap:clamp(1.5rem,4vw,3rem);
  padding:2.25rem 0;border-bottom:1px solid var(--line);
}
.footer-col-title{
  display:flex;align-items:baseline;gap:.6rem;
  font-size:var(--fs-14);letter-spacing:.14em;color:var(--gold);
  font-family:var(--f-body);font-weight:600;
}
.footer-col-num{font-family:var(--f-mono);font-size:11px;letter-spacing:.1em;color:var(--line-strong)}
.footer-list{margin-top:1rem}
.footer-list li+li{margin-top:.55rem}
.footer-list a{font-size:var(--fs-14);color:var(--mist);transition:color var(--t-fast) var(--ease)}
.footer-list a:hover,.footer-list a:focus-visible{color:var(--gold-bright)}

.footer-contact{padding:1.75rem 0;border-bottom:1px solid var(--line)}
.footer-contact-line{font-size:var(--fs-14);color:var(--text-soft);letter-spacing:.04em;max-width:none}
.footer-contact-address{margin-top:.5rem;font-size:var(--fs-12);color:var(--mist);letter-spacing:.06em}

.footer-legal{
  display:flex;flex-wrap:wrap;justify-content:space-between;gap:.75rem;
  padding-top:1.5rem;
}
.footer-legal-line{font-size:var(--fs-12);letter-spacing:.06em;color:var(--mist)}

.to-top{
  position:fixed;right:clamp(1rem,3vw,2rem);bottom:clamp(1rem,3vw,2rem);z-index:70;
  display:inline-flex;align-items:center;gap:.45rem;
  padding:.6rem 1rem;border:1px solid var(--line-strong);border-radius:999px;
  background:rgba(11,11,13,.92);color:var(--gold-bright);
  font-size:var(--fs-12);letter-spacing:.12em;
  opacity:0;visibility:hidden;transform:translateY(10px);
  transition:opacity var(--t-mid) var(--ease),transform var(--t-mid) var(--ease),border-color var(--t-fast) var(--ease);
}
.to-top[data-visible]{opacity:1;visibility:visible;transform:none}
.to-top:hover{border-color:var(--gold-bright)}

/* 6. layout helpers ------------------------------------------------------- */
.container{width:100%;max-width:var(--w-max);margin:0 auto;padding-inline:var(--gutter)}
.container--narrow{max-width:var(--w-narrow)}

.page-head{padding-block:clamp(2rem,6vw,4rem) 0}
.eyebrow{font-size:var(--fs-12);letter-spacing:.24em;text-transform:uppercase;color:var(--gold)}
.latin-label{font-size:var(--fs-12);letter-spacing:.18em;text-transform:lowercase;color:var(--mist)}
.lede{margin-top:1rem;font-size:clamp(1.05rem,1.6vw,var(--fs-20));line-height:1.8;color:var(--text-soft);max-width:62ch}
.gold-rule{height:1px;border:0;margin:clamp(1.5rem,4vw,2.5rem) 0;background:linear-gradient(90deg,var(--gold),rgba(200,162,74,.06))}

.breadcrumb{padding:1.5rem 0 0}
.breadcrumb-list{display:flex;flex-wrap:wrap;align-items:center;font-size:var(--fs-12);letter-spacing:.08em;color:var(--mist)}
.breadcrumb-list li{display:flex;align-items:center}
.breadcrumb-list li+li::before{content:"／";margin:0 .5rem;color:var(--line-strong)}
.breadcrumb-list a{transition:color var(--t-fast) var(--ease)}
.breadcrumb-list a:hover{color:var(--gold-bright)}
.breadcrumb-list [aria-current="page"]{color:var(--gold)}

.grid{display:grid;gap:clamp(1rem,2.5vw,1.75rem)}
.grid-2{grid-template-columns:repeat(2,minmax(0,1fr))}
.grid-3{grid-template-columns:repeat(3,minmax(0,1fr))}

/* 7. chapter system ------------------------------------------------------- */
.chapter-shell{display:grid;grid-template-columns:190px minmax(0,1fr);gap:clamp(1.5rem,4vw,3.5rem)}
.chapter-nav{position:sticky;top:calc(var(--header-h) + 1rem);align-self:start}
.chapter-nav-title{font-size:var(--fs-12);letter-spacing:.18em;color:var(--gold);text-transform:uppercase}
.chapter-nav-list{margin-top:.9rem;font-size:var(--fs-12);letter-spacing:.06em}
.chapter-nav-list li+li{margin-top:.35rem}
.chapter-nav-list a{
  display:flex;gap:.5rem;padding:.35rem 0 .35rem .85rem;
  border-left:1px solid var(--line);color:var(--mist);
  transition:color var(--t-fast) var(--ease),border-color var(--t-fast) var(--ease);
}
.chapter-nav-list a:hover{color:var(--ivory)}
.chapter-nav-list a[aria-current="true"]{color:var(--gold-bright);border-left-color:var(--gold-bright)}

.chapter{position:relative;padding-block:clamp(2.5rem,7vw,5.5rem);border-top:1px solid var(--line)}
.chapter:first-of-type{border-top:0}
.chapter-head{display:grid;grid-template-columns:auto minmax(0,1fr);gap:clamp(1rem,3vw,2.5rem);align-items:start}
.chapter-num{
  font-family:var(--f-display);font-weight:900;line-height:.82;
  font-size:clamp(3rem,9vw,var(--fs-96));letter-spacing:-.03em;
  color:rgba(200,162,74,.22);user-select:none;
}
.chapter-num--solid{color:var(--gold)}
.chapter-title{margin-top:.15rem}
.chapter-lede{margin-top:.9rem;font-size:var(--fs-16);line-height:1.85;color:var(--text-soft);max-width:60ch}

/* 8. surfaces ------------------------------------------------------------- */
.card{
  position:relative;padding:clamp(1.25rem,3vw,2rem);
  background:var(--ink-2);border:1px solid var(--line);
}
.card::after{
  content:"";position:absolute;inset:6px;border:1px solid rgba(200,162,74,.10);pointer-events:none;
}
.card-label{
  display:inline-block;margin-bottom:.75rem;
  font-size:var(--fs-12);letter-spacing:.18em;color:var(--jade);text-transform:uppercase;
}
.card--paper{background:var(--ivory);border-color:rgba(11,11,13,.14);color:#1B1813}
.card--paper h3,.card--paper h2{color:#14110B}
.card--paper .card-label{color:var(--jade-deep)}

.stack-paper{
  position:relative;padding:clamp(1.5rem,3vw,2.25rem);
  background:var(--paper);color:#1B1813;
  border:1px solid rgba(11,11,13,.16);
  box-shadow:8px 8px 0 -1px rgba(200,162,74,.20),8px 8px 0 0 rgba(200,162,74,.34);
}
.stack-paper h2,.stack-paper h3{color:#14110B}
.stack-paper .latin-label,.stack-paper .footer-brand-latin{color:#6C6A66}

.panel{
  padding:clamp(1.25rem,3vw,2rem);
  border:1px solid var(--line);
  background:linear-gradient(180deg,var(--ink-2),var(--ink));
}
.panel-title{
  font-size:var(--fs-12);letter-spacing:.2em;text-transform:uppercase;
  color:var(--gold);margin-bottom:1rem;
}
.status-list li,.status-row{
  display:flex;align-items:center;justify-content:space-between;gap:1rem;
  padding:.7rem 0;border-bottom:1px dashed rgba(200,162,74,.18);
  font-size:var(--fs-14);color:var(--text-soft);
}
.status-list li:last-child{border-bottom:0}
.status-key{display:inline-flex;align-items:center;gap:.5rem}
.status-value{font-family:var(--f-mono);font-size:var(--fs-12);letter-spacing:.08em;color:var(--gold-bright)}
.status-dot{display:inline-block;width:7px;height:7px;border-radius:50%;background:var(--jade);flex:0 0 auto}
.status-dot--live{background:var(--cinnabar)}
.status-dot--gold{background:var(--gold)}

/* 9. tags & buttons ------------------------------------------------------- */
.tag-list{display:flex;flex-wrap:wrap;gap:.5rem}
.tag{
  display:inline-flex;align-items:center;padding:.35rem .8rem;border-radius:999px;
  border:1px solid rgba(78,140,134,.45);background:rgba(47,95,91,.16);
  color:#93C7C0;font-size:var(--fs-12);letter-spacing:.06em;
  transition:border-color var(--t-fast) var(--ease),color var(--t-fast) var(--ease);
}
.tag:hover{border-color:var(--jade);color:var(--ivory)}
.tag--gold{border-color:var(--line-strong);background:rgba(200,162,74,.08);color:var(--gold-bright)}
.tag--gold:hover{border-color:var(--gold-bright)}
.tag--red{border-color:rgba(194,64,46,.5);background:rgba(194,64,46,.12);color:#E39A8C}
.tag--red:hover{border-color:var(--cinnabar)}

.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:.6rem;
  padding:.85rem 1.5rem;border:1px solid var(--line-strong);
  font-size:var(--fs-14);letter-spacing:.1em;color:var(--gold-bright);
  background:transparent;
  transition:background-color var(--t-fast) var(--ease),border-color var(--t-fast) var(--ease),color var(--t-fast) var(--ease); 
}
.btn:hover,.btn:focus-visible{background:rgba(200,162,74,.12);border-color:var(--gold-bright);color:var(--ivory)}
.btn--gold{background:var(--gold);border-color:var(--gold);color:#14110B;font-weight:600}
.btn--gold:hover,.btn--gold:focus-visible{background:var(--gold-bright);border-color:var(--gold-bright);color:#14110B}
.btn--ghost{color:var(--text-soft)}
.btn--jade{border-color:var(--jade-deep);color:#9CCFC8}
.btn--jade:hover,.btn--jade:focus-visible{border-color:var(--jade);background:rgba(47,95,91,.22)}
.btn--block{width:100%}

/* 10. media frames -------------------------------------------------------- */
.media-frame{
  position:relative;overflow:hidden;
  background:var(--ink-3);border:1px solid var(--line);
}
.media-frame::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background:
    linear-gradient(140deg,rgba(200,162,74,.12),transparent 55%),
    radial-gradient(120% 90% at 82% 8%,rgba(78,140,134,.16),transparent 62%);
}
.media-frame img,.media-frame video,.media-frame picture>*{
  width:100%;height:100%;object-fit:cover;display:block;
}
.media-frame--16x9{aspect-ratio:16/9}
.media-frame--4x3{aspect-ratio:4/3}
.media-frame--1x1{aspect-ratio:1/1}
.media-frame--wide{aspect-ratio:21/9}
.media-caption{
  margin-top:.6rem;font-size:var(--fs-12);letter-spacing:.06em;color:var(--mist);
}
@supports not (aspect-ratio:1/1){
  .media-frame{min-height:220px}
}

/* 11. prose --------------------------------------------------------------- */
.prose{max-width:68ch;font-size:var(--fs-16);line-height:1.85;color:var(--text-soft)}
.prose p+p{margin-top:1.1em}
.prose h2,.prose h3{margin:2em 0 .6em;color:var(--ivory)}
.prose ul,.prose ol{margin-top:.8em}
.prose li{position:relative;padding-left:1.3rem;margin-top:.55em}
.prose li::before{content:"";position:absolute;left:0;top:.75em;width:9px;height:1px;background:var(--gold)}
.prose strong{color:var(--ivory)}
.prose a{border-bottom:1px solid var(--line-strong);color:var(--gold-bright)}
.prose a:hover{border-bottom-color:var(--gold-bright)}

/* 12. motion -------------------------------------------------------------- */
.js [data-reveal]{
  opacity:0;transform:translateY(14px);
  transition:opacity .32s var(--ease),transform .32s var(--ease);
}
.js [data-reveal].is-visible{opacity:1;transform:none}

/* 13. responsive ---------------------------------------------------------- */
@media (max-width:1080px){
  .header-utility .pill{padding:.45rem .7rem}
  .nav-list{gap:.5rem}
}

@media (max-width:960px){
  :root{--header-h:112px}
  .header-inner{flex-wrap:wrap;gap:.75rem;padding:.85rem var(--gutter)}
  .nav-toggle{display:inline-flex;margin-left:auto}
  .header-utility{order:3;flex:1 1 100%;justify-content:flex-start}
  .site-nav{
    order:4;flex:1 1 100%;margin-left:0;
    display:none;padding-top:.5rem;border-top:1px solid var(--line);
  }
  .site-nav[data-open]{display:block}
  .nav-list{flex-direction:column;align-items:stretch;gap:0}
  .nav-list li{border-bottom:1px solid rgba(200,162,74,.12)}
  .nav-list a{
    width:100%;justify-content:space-between;padding:.9rem .15rem;
    font-size:var(--fs-16);color:var(--text-soft);
  }
  .nav-list a::after{display:none}
  .nav-num{order:2}

  .chapter-shell{grid-template-columns:1fr}
  .chapter-nav{position:static}
  .chapter-nav-list{margin-bottom:1.5rem}
  .grid-3{grid-template-columns:repeat(2,minmax(0,1fr))}
}

@media (max-width:760px){
  .footer-columns{grid-template-columns:1fr}
  .footer-head{align-items:flex-start}
  .footer-legal{flex-direction:column}
}

@media (max-width:640px){
  body{font-size:16px}
  .brand-name{font-size:var(--fs-16)}
  .brand-latin{letter-spacing:.14em}
  .header-utility .pill{font-size:11px;padding:.42rem .65rem}
  .grid-2,.grid-3{grid-template-columns:1fr}
  .chapter-head{grid-template-columns:1fr;gap:.5rem}
  .chapter-num{font-size:clamp(2.75rem,22vw,4rem)}
  .to-top{padding:.55rem .85rem}
}

/* 14. preferences --------------------------------------------------------- */
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
    scroll-behavior:auto !important;
  }
  .js [data-reveal]{opacity:1;transform:none}
  .pill--breathe{animation:none}
}