/* =========================================================
   皇冠体彩官网 · 共享样式表 /assets/site.css
   档案台面 + 鎏金索引：深墨绿底、玻璃索引层、暖白阅读层
   ========================================================= */

/* ---------- 1. Reset ---------- */
*,*::before,*::after{box-sizing:border-box}
html{
  -webkit-text-size-adjust:100%;
  scroll-behavior:smooth;
  scroll-padding-top:112px;
}
body,h1,h2,h3,h4,h5,p,ul,ol,li,figure,blockquote,dl,dd{margin:0}
ul,ol{padding:0;list-style:none}
img,svg,video{display:block;max-width:100%;height:auto}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
[hidden]{display:none !important}

/* ---------- 2. Tokens ---------- */
:root{
  --ink-900:#0E2A24;
  --ink-800:#143A31;
  --glass:rgba(30,74,63,.55);
  --gold:#C9A227;
  --gold-bright:#E8C766;
  --gold-deep:#7A5C14;
  --paper:#F5F1E8;
  --graphite:#3A3F3D;
  --sage:#8FA69E;
  --index-teal:#4E8C7B;
  --line:rgba(122,92,20,.34);
  --line-soft:rgba(122,92,20,.18);
  --font-display:"Noto Serif SC","Source Han Serif SC","Songti SC","SimSun",serif;
  --font-body:"Noto Sans SC","Source Han Sans SC","PingFang SC","Microsoft YaHei",sans-serif;
  --font-mono:"IBM Plex Mono","JetBrains Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
  --shell-max:1180px;
  --radius:14px;
  --shadow:0 18px 40px rgba(0,0,0,.3);
}

/* ---------- 3. Base typography ---------- */
body{
  background:var(--ink-900);
  color:var(--paper);
  font-family:var(--font-body);
  font-size:1.0625rem;
  font-weight:400;
  line-height:1.85;
  letter-spacing:.01em;
  overflow-x:hidden;
}
h1,h2,h3,h4{
  font-family:var(--font-display);
  font-weight:800;
  line-height:1.2;
  letter-spacing:.01em;
}
h1{font-size:clamp(2.4rem,5.5vw,4.4rem)}
h2{font-size:clamp(1.5rem,2.6vw,2.1rem)}
h3{font-size:clamp(1.15rem,1.7vw,1.35rem)}
strong{font-weight:700}
.mono{
  font-family:var(--font-mono);
  font-variant-numeric:tabular-nums;
  letter-spacing:.04em;
}
.annot{
  font-family:var(--font-mono);
  font-size:.75rem;
  letter-spacing:.18em;
  text-transform:uppercase;
  color:var(--sage);
}
.annot--vertical{writing-mode:vertical-rl;text-orientation:mixed}
:focus-visible{outline:2px solid var(--gold-bright);outline-offset:3px;border-radius:3px}

/* ---------- 4. Layout helpers ---------- */
.shell{
  width:100%;
  max-width:var(--shell-max);
  margin-inline:auto;
  padding-inline:clamp(18px,4vw,40px);
}
.measure{max-width:68ch}
.stack>*+*{margin-top:1rem}
.section{padding-block:clamp(36px,6vw,80px)}
.grid-12{
  display:grid;
  grid-template-columns:repeat(12,minmax(0,1fr));
  gap:clamp(14px,2vw,24px);
}
.col-3{grid-column:span 3}
.col-4{grid-column:span 4}
.col-6{grid-column:span 6}
.col-8{grid-column:span 8}
.col-12{grid-column:span 12}

/* ---------- 5. Buttons ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  gap:.55em;
  padding:.7em 1.3em;
  border:1px solid transparent;
  border-radius:999px;
  font-size:.95rem;
  font-weight:500;
  line-height:1.4;
  transition:background-color .2s ease,color .2s ease,border-color .2s ease,transform .2s ease;
}
.btn--gold{background:var(--gold);color:#12211D;border-color:var(--gold)}
.btn--gold:hover{background:var(--gold-bright);border-color:var(--gold-bright);transform:translateY(-2px)}
.btn--ghost{border-color:rgba(201,162,39,.6);color:var(--paper)}
.btn--ghost:hover{border-color:var(--gold-bright);color:var(--gold-bright);transform:translateY(-2px)}
.btn--quiet{background:rgba(245,241,232,.08);color:var(--paper)}
.btn--quiet:hover{background:rgba(245,241,232,.16)}

/* ---------- 6. Skip link ---------- */
.skip-link{
  position:absolute;
  left:50%;
  top:-120px;
  transform:translateX(-50%);
  z-index:120;
  padding:.7em 1.3em;
  background:var(--gold);
  color:#12211D;
  font-size:.9rem;
  border-radius:0 0 10px 10px;
  transition:top .22s ease;
}
.skip-link:focus{top:0}

/* ---------- 7. Reading progress ---------- */
.read-progress{
  position:fixed;
  inset:0 0 auto 0;
  height:2px;
  background:rgba(245,241,232,.08);
  z-index:100;
  pointer-events:none;
}
.read-progress__bar{
  display:block;
  height:100%;
  width:0;
  background:linear-gradient(90deg,var(--gold-deep),var(--gold) 55%,var(--gold-bright));
  transition:width .12s linear,filter .3s ease;
}
.read-progress.is-tick .read-progress__bar{filter:brightness(1.4)}

/* ---------- 8. Masthead header ---------- */
.site-header{
  position:sticky;
  top:0;
  z-index:60;
  background:rgba(14,42,36,.94);
  border-bottom:1px solid var(--line);
  color:var(--paper);
}
@supports ((-webkit-backdrop-filter:blur(10px)) or (backdrop-filter:blur(10px))){
  .site-header{
    background:rgba(14,42,36,.86);
    -webkit-backdrop-filter:blur(10px) saturate(130%);
    backdrop-filter:blur(10px) saturate(130%);
  }
}
.site-header__inner{
  display:grid;
  grid-template-columns:minmax(0,1fr) auto minmax(0,1fr);
  align-items:center;
  gap:clamp(12px,2vw,28px);
  padding-block:18px;
  transition:padding-block .28s ease;
}
.site-header.is-condensed .site-header__inner{padding-block:9px}
.site-header__rule{
  height:6px;
  border-top:1px solid var(--line-soft);
  background-image:repeating-linear-gradient(to right,rgba(201,162,39,.45) 0 1px,transparent 1px 14px);
}

/* brand */
.masthead__brand{min-width:0}
.brand{display:flex;align-items:center;gap:12px}
.brand__seal{
  flex:0 0 40px;
  width:40px;
  height:40px;
  display:grid;
  place-items:center;
  border:1px solid rgba(201,162,39,.6);
  border-radius:10px;
  background:linear-gradient(160deg,rgba(201,162,39,.24),rgba(14,42,36,.25));
  font-family:var(--font-display);
  font-weight:800;
  font-size:1.02rem;
  color:var(--gold-bright);
}
.brand__text{display:flex;flex-direction:column;min-width:0}
.brand__name{
  font-family:var(--font-display);
  font-weight:800;
  font-size:1.08rem;
  line-height:1.3;
  color:var(--paper);
}
.brand__tag{
  max-height:1.5rem;
  overflow:hidden;
  font-family:var(--font-mono);
  font-size:.68rem;
  line-height:1.5;
  letter-spacing:.14em;
  color:var(--sage);
  transition:opacity .26s ease,max-height .26s ease,transform .26s ease;
}
.site-header.is-condensed .brand__tag{opacity:0;max-height:0;transform:translateY(-4px)}

/* nav */
.masthead__nav{justify-self:center;min-width:0}
.nav-list{display:flex;align-items:center;gap:clamp(2px,1vw,14px)}
.nav-list__item{display:flex}
.nav-link{
  position:relative;
  display:inline-block;
  padding:8px 10px;
  font-size:.94rem;
  letter-spacing:.03em;
  color:var(--sage);
  border-radius:6px;
  transition:color .2s ease;
}
.nav-link::after{
  content:"";
  position:absolute;
  left:10px;
  right:10px;
  bottom:3px;
  height:1px;
  background:var(--gold);
  transform:scaleX(0);
  transform-origin:left center;
  transition:transform .24s ease;
}
.nav-link:hover{color:var(--paper)}
.nav-link:hover::after{transform:scaleX(1)}
.nav-link[aria-current="page"]{color:var(--gold-bright)}
.nav-link[aria-current="page"]::after{transform:scaleX(1);background:var(--gold-bright)}

/* aside */
.masthead__aside{
  justify-self:end;
  display:flex;
  align-items:center;
  gap:10px;
  min-width:0;
}
.quick-find{
  padding:.55em 1.05em;
  border:1px solid rgba(201,162,39,.6);
  border-radius:999px;
  font-size:.88rem;
  white-space:nowrap;
  color:var(--paper);
  transition:border-color .2s ease,color .2s ease,background-color .2s ease;
}
.quick-find:hover{border-color:var(--gold-bright);color:var(--gold-bright);background:rgba(201,162,39,.12)}
.index-hint{
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:.45em .8em;
  border:1px solid rgba(201,162,39,.26);
  border-radius:999px;
  background:var(--glass);
  font-family:var(--font-mono);
  font-size:.72rem;
  letter-spacing:.08em;
  color:var(--sage);
  transition:border-color .2s ease,color .2s ease;
}
.index-hint__no{color:var(--gold-bright)}
.index-hint__label{font-family:var(--font-body);letter-spacing:.06em}
.index-hint:hover{border-color:rgba(201,162,39,.6);color:var(--paper)}

/* toggle */
.nav-toggle{
  display:none;
  align-items:center;
  gap:8px;
  padding:.55em .95em;
  border:1px solid rgba(201,162,39,.55);
  border-radius:999px;
  color:var(--paper);
  font-size:.85rem;
  transition:border-color .2s ease,color .2s ease;
}
.nav-toggle:hover{border-color:var(--gold-bright);color:var(--gold-bright)}
.nav-toggle__bars{display:grid;gap:4px;width:16px}
.nav-toggle__bar{display:block;height:1px;background:currentColor}
.nav-toggle[aria-expanded="true"]{border-color:var(--gold-bright);color:var(--gold-bright)}

/* ---------- 9. Footer ---------- */
.site-footer{
  position:relative;
  margin-top:clamp(48px,8vw,110px);
  background:var(--ink-800);
  border-top:1px solid rgba(201,162,39,.4);
  color:var(--paper);
}
.site-footer::before{
  content:"";
  display:block;
  height:6px;
  background-image:repeating-linear-gradient(to right,rgba(201,162,39,.45) 0 1px,transparent 1px 14px);
}
.footer-band{
  padding-block:clamp(26px,4vw,46px);
  border-bottom:1px solid var(--line-soft);
}
.footer-band:last-child{border-bottom:0}
.footer-band--legal{background:rgba(14,42,36,.66)}
.footer-heading{
  margin-bottom:1rem;
  font-size:1.12rem;
  color:var(--paper);
}
.footer-quicklinks{
  display:grid;
  grid-template-columns:repeat(4,minmax(0,1fr));
  gap:14px;
}
.footer-quicklink{
  display:flex;
  gap:12px;
  align-items:flex-start;
  height:100%;
  padding:16px;
  border:1px solid rgba(201,162,39,.28);
  border-radius:12px;
  background:var(--glass);
  transition:border-color .22s ease,transform .22s ease,background-color .22s ease;
}
.footer-quicklink:hover{
  border-color:var(--gold);
  background:rgba(30,74,63,.75);
  transform:translateY(-2px);
}
.footer-quicklink__no{
  font-family:var(--font-mono);
  font-size:.82rem;
  line-height:1.75;
  color:var(--gold);
}
.footer-quicklink__body{display:flex;flex-direction:column;gap:2px}
.footer-quicklink__title{font-size:.98rem;font-weight:500;color:var(--paper)}
.footer-quicklink__meta{font-size:.78rem;line-height:1.55;color:var(--sage)}

.footer-nav{
  display:grid;
  grid-template-columns:repeat(4,minmax(0,1fr));
  gap:clamp(20px,3vw,32px);
}
.footer-nav__title{
  margin-bottom:.9rem;
  font-family:var(--font-mono);
  font-size:.72rem;
  letter-spacing:.2em;
  color:var(--sage);
  text-transform:uppercase;
}
.footer-nav__list{display:grid;gap:9px}
.footer-nav__link{font-size:.92rem;color:rgba(245,241,232,.86);transition:color .2s ease}
.footer-nav__link:hover{color:var(--gold-bright)}
.footer-note{font-size:.86rem;line-height:1.75;color:var(--sage)}
.footer-copy{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px;
  margin-top:.6rem;
}
.footer-copy__value{
  font-family:var(--font-mono);
  font-size:.8rem;
  color:var(--paper);
}
.copy-btn{
  padding:.35em .75em;
  border:1px solid rgba(201,162,39,.5);
  border-radius:999px;
  background:transparent;
  color:var(--gold-bright);
  font-family:var(--font-mono);
  font-size:.72rem;
  letter-spacing:.08em;
  transition:background-color .2s ease,color .2s ease,border-color .2s ease;
}
.copy-btn:hover{background:rgba(201,162,39,.16)}
.copy-btn[data-copied]{background:var(--gold);border-color:var(--gold);color:#12211D}

.footer-legal{
  display:flex;
  flex-wrap:wrap;
  justify-content:space-between;
  gap:12px 32px;
  font-size:.82rem;
  color:var(--sage);
}
.footer-legal__item{display:flex;gap:8px;align-items:baseline}
.footer-legal__k{
  font-family:var(--font-mono);
  font-size:.72rem;
  letter-spacing:.12em;
  color:rgba(201,162,39,.85);
}
.footer-legal__item--muted{color:rgba(143,166,158,.88)}

/* ---------- 10. Shared page components ---------- */
.breadcrumb{
  font-family:var(--font-mono);
  font-size:.78rem;
  letter-spacing:.12em;
  color:var(--sage);
}
.breadcrumb__list{display:flex;flex-wrap:wrap;align-items:center;gap:6px}
.breadcrumb__list li+li::before{content:"/";margin-right:6px;color:var(--gold-deep)}
.breadcrumb__link{transition:color .2s ease}
.breadcrumb__link:hover{color:var(--gold-bright)}
.breadcrumb [aria-current="page"]{color:var(--gold-bright)}

.chapter{
  display:grid;
  grid-template-columns:minmax(86px,116px) minmax(0,1fr);
  gap:clamp(16px,3vw,36px);
  padding-block:clamp(26px,4vw,46px);
  border-top:1px solid var(--line-soft);
}
.chapter__no{
  font-family:var(--font-mono);
  font-size:clamp(1.6rem,3vw,2.4rem);
  line-height:1;
  color:var(--sage);
  transition:color .24s ease;
}
.chapter.is-current .chapter__no{color:var(--gold-bright)}
.chapter__title{margin-bottom:.6rem}
.chapter__body{max-width:68ch}

.glass{
  background:var(--glass);
  border:1px solid rgba(201,162,39,.28);
  border-radius:var(--radius);
}
@supports ((-webkit-backdrop-filter:blur(8px)) or (backdrop-filter:blur(8px))){
  .glass{-webkit-backdrop-filter:blur(8px) saturate(120%);backdrop-filter:blur(8px) saturate(120%)}
}
.panel{
  padding:clamp(18px,2.4vw,28px);
  border-radius:var(--radius);
  background:var(--paper);
  color:var(--graphite);
  box-shadow:var(--shadow);
}
.panel--ink{background:var(--ink-800);color:var(--paper)}
.panel__title{
  margin-bottom:.5rem;
  font-family:var(--font-display);
  font-size:1.24rem;
  color:inherit;
}

.toc{font-family:var(--font-mono);font-size:.82rem}
.toc__list{display:grid;gap:2px}
.toc__link{
  display:flex;
  gap:10px;
  padding:9px 12px;
  border-left:2px solid transparent;
  color:var(--sage);
  letter-spacing:.04em;
  transition:color .2s ease,background-color .2s ease,border-color .2s ease;
}
.toc__link:hover{color:var(--paper);background:rgba(201,162,39,.08)}
.toc__link.is-current{color:var(--gold-bright);border-left-color:var(--gold)}
.toc__no{opacity:.7}

.figure{margin:0}
.figure__media{
  position:relative;
  overflow:hidden;
  aspect-ratio:16 / 10;
  border:1px solid rgba(201,162,39,.25);
  border-radius:12px;
  background:linear-gradient(150deg,rgba(30,74,63,.92),rgba(14,42,36,.96));
}
.figure__media img{width:100%;height:100%;object-fit:cover}
.figure__caption{
  margin-top:.65rem;
  font-family:var(--font-mono);
  font-size:.76rem;
  letter-spacing:.06em;
  color:var(--sage);
}
.figure--wide .figure__media{aspect-ratio:21 / 9}
.figure--tall .figure__media{aspect-ratio:3 / 4}

.status{margin-top:.6rem;min-height:1.3em;font-size:.86rem;color:var(--sage)}
.status[data-state="ok"]{color:var(--gold-bright)}
.status[data-state="error"]{color:var(--paper)}

.reveal{opacity:0;transform:translateY(12px);transition:opacity .5s ease,transform .5s ease}
.reveal.is-in{opacity:1;transform:none}

/* ---------- 11. Responsive ---------- */
@media (max-width:1000px){
  .footer-quicklinks{grid-template-columns:repeat(2,minmax(0,1fr))}
  .footer-nav{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media (max-width:900px){
  html{scroll-padding-top:96px}
  .site-header__inner{
    grid-template-columns:minmax(0,1fr) auto;
    padding-block:14px;
    gap:10px;
  }
  .site-header.is-condensed .site-header__inner{padding-block:10px}
  .masthead__brand{grid-column:1;grid-row:1}
  .masthead__aside{grid-column:2;grid-row:1;justify-self:end}
  .index-hint{display:none}
  .nav-toggle{display:inline-flex}
  .masthead__nav{
    grid-column:1 / -1;
    grid-row:2;
    justify-self:stretch;
    max-height:0;
    opacity:0;
    visibility:hidden;
    overflow:hidden;
    border-top:1px solid transparent;
    transition:max-height .34s ease,opacity .24s ease,visibility .24s linear,border-color .24s ease;
  }
  .masthead__nav[data-open]{
    max-height:min(70vh,520px);
    opacity:1;
    visibility:visible;
    overflow-y:auto;
    padding-top:10px;
    border-top-color:var(--line);
  }
  .nav-list{flex-direction:column;align-items:stretch;gap:0}
  .nav-list__item{border-top:1px solid var(--line-soft)}
  .nav-list__item:first-child{border-top:0}
  .nav-link{display:block;padding:14px 4px;font-size:1rem}
  .nav-link::after{left:4px;right:auto;width:26px;bottom:8px}
  .grid-12 .col-3,.grid-12 .col-4{grid-column:span 6}
  .grid-12 .col-6,.grid-12 .col-8{grid-column:span 12}
}
@media (max-width:600px){
  body{font-size:1rem;line-height:1.8}
  .brand__tag{display:none}
  .chapter{grid-template-columns:1fr;gap:10px}
  .grid-12 .col-3,.grid-12 .col-4,
  .grid-12 .col-6,.grid-12 .col-8{grid-column:span 12}
  .footer-quicklinks{grid-template-columns:1fr}
  .footer-nav{grid-template-columns:1fr}
  .footer-legal{flex-direction:column;gap:8px}
}
@media (max-width:560px){
  .quick-find{padding:.5em .85em;font-size:.82rem}
}

/* ---------- 12. Reduced motion ---------- */
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
  }
  .reveal{opacity:1;transform:none}
  .read-progress__bar{transition:none}
}