/* =========================================================
   家乐棋牌 · 共享站点样式 /assets/site.css
   档案靛 + 纸白 + 红土赭锚点 · 锐利直角 · 1px 精密网格
   ========================================================= */

/* ---------- reset ---------- */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body,h1,h2,h3,h4,h5,h6,p,ul,ol,li,figure,blockquote,dl,dd,details,summary{margin:0}
ul,ol{padding:0;list-style:none}
img,svg,video{display:block;max-width:100%;height:auto}
button{font:inherit;color:inherit;background:none;border:0;padding:0;cursor:pointer}
a{color:inherit;text-decoration:none}
table{border-collapse:collapse;width:100%}
summary{display:block}
hr{border:0;border-top:1px solid currentColor;opacity:.2}
:where(a,button,summary,[tabindex],input,select,textarea):focus-visible{outline:2px solid var(--whistle);outline-offset:2px}

/* ---------- tokens ---------- */
:root{
  --indigo:#101A33;
  --ink:#0A0C12;
  --paper:#F4F1EA;
  --ochre:#B3402A;
  --ochre-soft:#D9705A;
  --whistle:#F2C14E;
  --turf:#2F7D5B;
  --slate:#7C879C;
  --ochre-deep:#7A2A1C;
  --night:#1D2A4A;

  --line-dark:rgba(244,241,234,.16);
  --line-dark-soft:rgba(244,241,234,.08);
  --line-light:rgba(10,12,18,.14);
  --line-light-soft:rgba(10,12,18,.07);

  --dim-on-dark:rgba(244,241,234,.78);
  --dim-on-light:rgba(10,12,18,.68);

  --font-display:"Barlow Condensed","Oswald","Arial Narrow","PingFang SC","Microsoft YaHei",system-ui,sans-serif;
  --font-sans:Inter,"Noto Sans SC","PingFang SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  --font-mono:ui-monospace,"JetBrains Mono","SFMono-Regular",Menlo,Consolas,"Noto Sans Mono CJK SC",monospace;

  --header-h:66px;
  --wrap-max:1280px;
  --ease:cubic-bezier(.22,.61,.36,1);
  --dur:240ms;
}
@media (min-width:900px){:root{--header-h:78px}}

/* ---------- base ---------- */
body{
  font-family:var(--font-sans);
  font-size:17px;
  line-height:1.75;
  font-weight:400;
  color:var(--ink);
  background:var(--paper);
  padding-top:var(--header-h);
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
  overflow-wrap:anywhere;
}
h1,h2,h3,h4,h5,h6{
  font-family:var(--font-display);
  font-weight:800;
  letter-spacing:-.01em;
  line-height:1.08;
  text-wrap:balance;
}
h1{font-size:clamp(36px,6vw,76px)}
h2{font-size:clamp(28px,3.6vw,40px)}
h3{font-size:clamp(19px,2vw,22px)}
h4{font-size:17px;letter-spacing:0}
strong{font-weight:600}
main{display:block}
#main-content{scroll-margin-top:calc(var(--header-h) + 16px)}

/* ---------- utilities ---------- */
.wrap{width:100%;max-width:var(--wrap-max);margin-inline:auto;padding-inline:clamp(16px,3vw,40px)}
.wrap--narrow{max-width:840px}
.section{padding-block:clamp(72px,10vw,150px)}
.section--tight{padding-block:clamp(48px,6vw,84px)}
.section--paper{background:var(--paper);color:var(--ink)}
.section--indigo{background:var(--indigo);color:var(--paper)}
.section--night{background:var(--night);color:var(--paper)}
.bleed-top{margin-top:calc(-1 * var(--header-h))}
.visually-hidden{position:absolute!important;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);clip-path:inset(50%);white-space:nowrap}
.muted{color:var(--slate)}
.num{font-family:var(--font-mono);font-variant-numeric:tabular-nums;letter-spacing:.02em}

/* ---------- header ---------- */
.site-header{
  position:fixed;
  top:0;left:0;right:0;
  z-index:90;
  color:var(--paper);
  background:linear-gradient(180deg,rgba(16,26,51,.94) 0%,rgba(16,26,51,.58) 64%,rgba(16,26,51,0) 100%);
  transition:background var(--dur) var(--ease),box-shadow var(--dur) var(--ease);
}
.site-header[data-scrolled="true"],
.site-header[data-solid="true"]{
  background:var(--indigo);
  box-shadow:inset 0 -1px 0 rgba(244,241,234,.18);
}
.header-inner{
  display:flex;
  align-items:center;
  gap:20px;
  min-height:var(--header-h);
  max-width:var(--wrap-max);
  margin-inline:auto;
  padding-inline:clamp(16px,3vw,40px);
}
.brand{display:flex;flex-direction:column;gap:2px;flex:0 0 auto;min-width:0}
.brand-mark{
  font-family:var(--font-display);
  font-weight:900;
  font-size:22px;
  line-height:1;
  letter-spacing:.02em;
}
.brand-sub{
  font-family:var(--font-mono);
  font-size:11px;
  line-height:1.4;
  letter-spacing:.08em;
  color:rgba(244,241,234,.62);
  white-space:nowrap;
}
.nav-primary{
  display:flex;
  align-items:center;
  gap:clamp(14px,2vw,30px);
  margin-left:auto;
}
.nav-list{display:flex;align-items:center;gap:clamp(12px,1.9vw,28px)}
.nav-link{
  position:relative;
  display:inline-block;
  padding:8px 0;
  font-size:15px;
  letter-spacing:.08em;
  color:rgba(244,241,234,.82);
  transition:color var(--dur) var(--ease);
}
.nav-link::after{
  content:"";
  position:absolute;
  left:0;right:0;bottom:2px;
  height:2px;
  background:var(--ochre);
  transform:scaleX(0);
  transform-origin:left center;
  transition:transform var(--dur) var(--ease);
}
.nav-link:hover{color:var(--paper)}
.nav-link:hover::after{transform:scaleX(1)}
.nav-link[aria-current="page"]{color:var(--paper);font-weight:600}
.nav-link[aria-current="page"]::after{transform:scaleX(1)}
.update-badge{
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:7px 12px;
  background:var(--whistle);
  color:var(--indigo);
  font-family:var(--font-mono);
  font-size:12px;
  font-weight:600;
  letter-spacing:.04em;
  white-space:nowrap;
  transition:background var(--dur) var(--ease),color var(--dur) var(--ease);
}
.update-badge:hover{background:var(--paper);color:var(--indigo)}
.update-dot{width:6px;height:6px;background:var(--ochre);flex:0 0 auto}
.nav-toggle{
  display:none;
  align-items:center;
  gap:8px;
  margin-left:auto;
  padding:9px 12px;
  border:1px solid var(--line-dark);
  color:var(--paper);
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.08em;
}
.nav-toggle-bars{display:block;width:16px}
.nav-toggle-bars span{
  display:block;
  height:1px;
  margin:4px 0;
  background:currentColor;
  transition:transform var(--dur) var(--ease),opacity var(--dur) var(--ease);
}
.nav-toggle[aria-expanded="true"] .nav-toggle-bars span:nth-child(1){transform:translateY(5px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] .nav-toggle-bars span:nth-child(2){opacity:0}
.nav-toggle[aria-expanded="true"] .nav-toggle-bars span:nth-child(3){transform:translateY(-5px) rotate(-45deg)}
.nav-toggle-text{line-height:1}
.read-progress{
  position:absolute;
  left:0;right:0;bottom:0;
  height:2px;
  background:rgba(244,241,234,.14);
  pointer-events:none;
}
.read-progress-bar{
  display:block;
  width:100%;height:100%;
  background:var(--ochre);
  transform:scaleX(0);
  transform-origin:left center;
  transition:transform 120ms linear;
}
.skip-link{
  position:absolute;
  top:8px;left:12px;
  z-index:120;
  padding:10px 16px;
  background:var(--whistle);
  color:var(--ink);
  font-family:var(--font-mono);
  font-size:13px;
  letter-spacing:.06em;
  transform:translateY(-200%);
  transition:transform var(--dur) var(--ease);
}
.skip-link:focus{transform:translateY(0)}
body.nav-open{overflow:hidden}

/* ---------- footer ---------- */
.site-footer{
  background:var(--indigo);
  color:var(--paper);
  padding-block:clamp(56px,7vw,96px) 26px;
  box-shadow:inset 0 1px 0 var(--line-dark-soft);
}
.footer-inner{
  max-width:var(--wrap-max);
  margin-inline:auto;
  padding-inline:clamp(16px,3vw,40px);
}
.footer-brand{
  display:flex;
  flex-wrap:wrap;
  align-items:baseline;
  gap:10px 18px;
  padding-bottom:26px;
  border-bottom:1px solid var(--line-dark);
}
.footer-mark{
  font-family:var(--font-display);
  font-weight:900;
  font-size:26px;
  line-height:1;
  letter-spacing:.02em;
}
.footer-tag{
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.08em;
  color:var(--slate);
}
.footer-grid{
  display:grid;
  grid-template-columns:repeat(4,minmax(0,1fr));
  gap:36px 24px;
  padding-block:40px;
}
.footer-title{
  font-family:var(--font-mono);
  font-size:12px;
  font-weight:600;
  letter-spacing:.08em;
  text-transform:uppercase;
  color:var(--whistle);
  line-height:1.4;
  padding-bottom:10px;
  margin-bottom:16px;
  border-bottom:1px solid var(--line-dark);
}
.footer-list li+li{margin-top:10px}
.footer-link{
  font-size:15px;
  line-height:1.5;
  color:var(--dim-on-dark);
  transition:color var(--dur) var(--ease);
}
.footer-link:hover{color:var(--paper);text-decoration:underline;text-underline-offset:4px;text-decoration-color:var(--ochre)}
.footer-bottom{
  display:flex;
  flex-wrap:wrap;
  justify-content:space-between;
  gap:8px 24px;
  padding-top:22px;
  border-top:1px solid var(--line-dark);
}
.footer-meta{
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.04em;
  line-height:1.7;
  color:var(--slate);
}

/* ---------- typography components ---------- */
.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:10px;
  font-family:var(--font-mono);
  font-size:12px;
  font-weight:600;
  letter-spacing:.08em;
  text-transform:uppercase;
  color:var(--slate);
}
.eyebrow::before{content:"";width:10px;height:10px;background:var(--ochre);flex:0 0 auto}
.lede{font-size:clamp(17px,1.4vw,19px);line-height:1.7;color:var(--dim-on-light)}
.section--indigo .lede,.section--night .lede{color:var(--dim-on-dark)}
.prose{max-width:72ch;font-size:17px;line-height:1.75}
.prose p+p{margin-top:1.4em}
.prose h2{margin-top:2.2em;margin-bottom:.55em}
.prose h3{margin-top:1.8em;margin-bottom:.5em}
.prose ul{margin-top:1em}
.prose li{position:relative;padding-left:20px}
.prose li+li{margin-top:.55em}
.prose li::before{content:"";position:absolute;left:0;top:.85em;width:8px;height:1px;background:var(--ochre)}

/* ---------- crumbs ---------- */
.crumbs{
  display:flex;
  flex-wrap:wrap;
  gap:8px;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.06em;
  color:var(--slate);
}
.crumbs li{display:flex;align-items:center;gap:8px}
.crumbs li::after{content:"/";opacity:.45}
.crumbs li:last-child::after{content:none}
.crumbs a:hover{color:var(--ochre)}
.crumbs [aria-current="page"]{color:var(--dim-on-light)}

/* ---------- grid ---------- */
.grid-12{
  display:grid;
  grid-template-columns:repeat(12,minmax(0,1fr));
  gap:clamp(16px,2vw,28px);
}
.col-3{grid-column:span 3}
.col-4{grid-column:span 4}
.col-5{grid-column:span 5}
.col-6{grid-column:span 6}
.col-7{grid-column:span 7}
.col-8{grid-column:span 8}
.col-9{grid-column:span 9}
.col-12{grid-column:span 12}
@media (max-width:1023px){
  .col-3,.col-4,.col-5{grid-column:span 6}
  .col-7,.col-8,.col-9{grid-column:span 12}
}
@media (max-width:700px){
  .grid-12>[class*="col-"]{grid-column:span 12}
}

/* ---------- buttons & chips ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  gap:10px;
  padding:13px 22px;
  border:1px solid transparent;
  font-family:var(--font-mono);
  font-size:13px;
  font-weight:600;
  letter-spacing:.08em;
  line-height:1;
  border-radius:0;
  transition:background var(--dur) var(--ease),color var(--dur) var(--ease),border-color var(--dur) var(--ease);
}
.btn--primary{background:var(--ochre);color:var(--paper)}
.btn--primary:hover{background:var(--ochre-deep)}
.btn--yellow{background:var(--whistle);color:var(--ink)}
.btn--yellow:hover{background:var(--paper)}
.btn--ghost{border-color:currentColor;color:inherit}
.btn--ghost:hover{background:var(--ochre);border-color:var(--ochre);color:var(--paper)}
.chip{
  display:inline-block;
  padding:3px 9px;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.06em;
  line-height:1.5;
  border:1px solid currentColor;
  color:var(--slate);
  clip-path:polygon(0 0,calc(100% - 2px) 0,100% 2px,100% 100%,2px 100%,0 calc(100% - 2px));
}
.chip--ochre{color:var(--ochre)}
.chip--whistle{color:var(--whistle)}
.chip--turf{color:var(--turf)}

/* ---------- stats ---------- */
.stat{display:flex;flex-direction:column;gap:4px}
.stat-value{
  font-family:var(--font-mono);
  font-weight:600;
  font-size:clamp(24px,3vw,34px);
  line-height:1.15;
  letter-spacing:.02em;
  font-variant-numeric:tabular-nums;
}
.stat-label{
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.08em;
  line-height:1.5;
  color:var(--slate);
}
.stat--whistle .stat-value{color:var(--whistle)}
.stat--turf .stat-value{color:var(--turf)}
.stat--ochre .stat-value{color:var(--ochre)}

/* ---------- rules & ticks ---------- */
.rule-ticks{
  height:8px;
  background-image:repeating-linear-gradient(90deg,currentColor 0 1px,transparent 1px 10px);
  opacity:.35;
}
.section-tick{
  position:absolute;
  left:0;top:0;
  width:2px;height:56px;
  background:var(--slate);
  transition:background var(--dur) var(--ease);
}
[data-section][data-active="true"] .section-tick{background:var(--whistle)}

/* ---------- media ---------- */
.media{
  position:relative;
  display:block;
  aspect-ratio:16/9;
  background:var(--night);
  overflow:hidden;
}
.media--wide{aspect-ratio:21/9}
.media--tall{aspect-ratio:4/5}
.media--square{aspect-ratio:1/1}
.media img{width:100%;height:100%;object-fit:cover}
.media__placeholder{
  position:absolute;
  inset:0;
  display:flex;
  align-items:center;
  justify-content:center;
  padding:16px;
  text-align:center;
  background-image:
    linear-gradient(rgba(124,135,156,.24) 1px,transparent 1px),
    linear-gradient(90deg,rgba(124,135,156,.24) 1px,transparent 1px);
  background-size:44px 44px;
  color:var(--slate);
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.08em;
}
.frame{position:relative;border:1px solid currentColor;padding:10px}
.frame--ruler::before,.frame--ruler::after{
  content:"";
  position:absolute;
  left:0;right:0;
  height:7px;
  background-image:repeating-linear-gradient(90deg,currentColor 0 1px,transparent 1px 12px);
  opacity:.4;
}
.frame--ruler::before{top:-7px}
.frame--ruler::after{bottom:-7px}
.figure-caption{
  margin-top:10px;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.04em;
  line-height:1.6;
  color:var(--slate);
}

/* ---------- tables ---------- */
.table-wrap{
  overflow-x:auto;
  border-top:1px solid var(--line-light);
  -webkit-overflow-scrolling:touch;
}
.data-table{min-width:640px;font-size:14px;line-height:1.5}
.data-table th,.data-table td{
  padding:12px 14px;
  text-align:left;
  white-space:nowrap;
  border-bottom:1px solid var(--line-light-soft);
}
.data-table thead th{
  position:sticky;
  top:0;
  z-index:1;
  background:var(--paper);
  font-family:var(--font-mono);
  font-size:12px;
  font-weight:600;
  letter-spacing:.08em;
  color:var(--slate);
}
.data-table tbody tr:nth-child(even){background:rgba(10,12,18,.028)}
.data-table tbody tr:hover{background:rgba(179,64,42,.06)}
.data-table td.is-num{font-family:var(--font-mono);font-variant-numeric:tabular-nums;text-align:right}
.section--indigo .table-wrap,.section--night .table-wrap{border-top-color:var(--line-dark)}
.section--indigo .data-table th,.section--indigo .data-table td,
.section--night .data-table th,.section--night .data-table td{border-bottom-color:var(--line-dark-soft)}
.section--indigo .data-table thead th,.section--night .data-table thead th{background:var(--indigo);color:var(--slate)}
.section--indigo .data-table tbody tr:nth-child(even),
.section--night .data-table tbody tr:nth-child(even){background:rgba(244,241,234,.04)}

/* ---------- chapter rail ---------- */
.season-rail{
  position:sticky;
  top:calc(var(--header-h) + 24px);
  display:flex;
  flex-direction:column;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.06em;
}
.season-rail a{
  display:flex;
  align-items:center;
  gap:10px;
  padding:6px 0 6px 12px;
  border-left:1px solid var(--line-light);
  color:var(--slate);
  transition:color var(--dur) var(--ease),border-color var(--dur) var(--ease);
}
.season-rail a::before{content:"";width:10px;height:1px;background:currentColor;flex:0 0 auto}
.season-rail a:hover{color:var(--ink)}
.season-rail a[aria-current="true"]{color:var(--ochre);border-left-color:var(--ochre)}
.section--indigo .season-rail a,.section--night .season-rail a{border-left-color:var(--line-dark)}
.section--indigo .season-rail a:hover,.section--night .season-rail a:hover{color:var(--paper)}

/* ---------- index cards (details/summary) ---------- */
.index-card{border-top:1px solid var(--line-light)}
.index-card>summary{
  display:grid;
  grid-template-columns:56px minmax(0,1fr) auto auto;
  align-items:baseline;
  gap:14px;
  padding:18px 4px;
  cursor:pointer;
  font-family:var(--font-display);
  font-weight:700;
  font-size:clamp(18px,2vw,22px);
  line-height:1.25;
  transition:color var(--dur) var(--ease);
}
.index-card>summary::-webkit-details-marker{display:none}
.index-card>summary:hover{color:var(--ochre)}
.index-card__num{
  font-family:var(--font-mono);
  font-size:12px;
  font-weight:600;
  letter-spacing:.08em;
  color:var(--ochre);
}
.index-card__meta{
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.06em;
  color:var(--slate);
}
.index-card__mark{position:relative;width:12px;height:12px;flex:0 0 auto;align-self:center;color:var(--ochre)}
.index-card__mark::before,.index-card__mark::after{
  content:"";
  position:absolute;
  left:0;right:0;top:50%;
  height:1px;
  background:currentColor;
  transform:translateY(-50%);
}
.index-card__mark::after{transform:translateY(-50%) rotate(90deg);transition:transform var(--dur) var(--ease)}
.index-card[open]>summary{color:var(--ochre-deep)}
.index-card[open] .index-card__mark::after{transform:translateY(-50%) rotate(0deg)}
.index-card__body{padding:0 4px 22px 74px;font-size:16px;color:var(--dim-on-light)}
.section--indigo .index-card,.section--night .index-card{border-top-color:var(--line-dark)}
.section--indigo .index-card__body,.section--night .index-card__body{color:var(--dim-on-dark)}

/* ---------- reveal ---------- */
html.js [data-reveal]{
  opacity:0;
  transform:translateY(12px);
  transition:opacity 320ms var(--ease),transform 320ms var(--ease);
}
html.js [data-reveal].is-in{opacity:1;transform:none}

/* ---------- responsive: header / footer ---------- */
@media (max-width:899px){
  .brand-mark{font-size:19px}
  .brand-sub{font-size:10px;letter-spacing:.06em}
  .nav-toggle{display:inline-flex}
  .header-inner{gap:12px}
  .nav-primary{
    position:fixed;
    top:var(--header-h);
    left:0;right:0;
    display:block;
    margin:0;
    padding:0 16px 26px;
    background:var(--indigo);
    box-shadow:inset 0 -1px 0 var(--line-dark),0 24px 44px rgba(0,0,0,.38);
    max-height:calc(100vh - var(--header-h));
    overflow-y:auto;
    opacity:0;
    visibility:hidden;
    pointer-events:none;
    transform:translateY(-8px);
    transition:opacity var(--dur) var(--ease),transform var(--dur) var(--ease),visibility 0s linear var(--dur);
  }
  .nav-primary::before{
    content:"";
    display:block;
    height:7px;
    margin-bottom:6px;
    background-image:repeating-linear-gradient(90deg,var(--slate) 0 1px,transparent 1px 12px);
    opacity:.5;
  }
  .nav-primary[data-open="true"]{
    opacity:1;
    visibility:visible;
    pointer-events:auto;
    transform:none;
    transition:opacity var(--dur) var(--ease),transform var(--dur) var(--ease),visibility 0s;
  }
  .nav-list{display:block}
  .nav-item{border-bottom:1px solid var(--line-dark)}
  .nav-item:first-child{border-top:1px solid var(--line-dark)}
  .nav-link{display:flex;align-items:center;gap:14px;padding:16px 4px;font-size:17px;letter-spacing:.04em}
  .nav-link[data-index]::before{
    content:attr(data-index);
    font-family:var(--font-mono);
    font-size:11px;
    letter-spacing:.08em;
    color:var(--slate);
  }
  .nav-link::after{bottom:0;height:2px}
  .update-badge{margin-top:20px;width:100%;justify-content:center;padding:12px}
}
@media (max-width:900px){
  .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:30px 20px}
}
@media (max-width:560px){
  .footer-grid{grid-template-columns:minmax(0,1fr)}
  .footer-bottom{flex-direction:column;gap:6px}
  .index-card__body{padding-left:4px}
  .index-card>summary{grid-template-columns:44px minmax(0,1fr) auto;gap:10px}
  .index-card__meta{display:none}
}

/* ---------- motion & print ---------- */
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{
    animation-duration:.001ms!important;
    animation-iteration-count:1!important;
    transition-duration:.001ms!important;
  }
  html.js [data-reveal]{opacity:1!important;transform:none!important}
}
@media print{
  .site-header,.read-progress,.skip-link{display:none}
  body{padding-top:0;background:#fff}
}