/* =====================================================================
   金宝搏注册 · shared site kit  (/assets/site.css)
   ===================================================================== */

/* ---------- 1. reset ---------- */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;text-size-adjust:100%}
body,h1,h2,h3,h4,h5,p,ul,ol,li,figure,figcaption,blockquote,dl,dd,hr{margin:0;padding:0}
ul,ol{list-style:none}
img,svg,video{display:block;max-width:100%;height:auto}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
a{color:inherit;text-decoration:none}
hr{border:0}
summary{list-style:none;cursor:pointer}
summary::-webkit-details-marker{display:none}

/* ---------- 2. tokens ---------- */
:root{
  --ink:#0A1A2F;
  --ink-2:#102A43;
  --ink-3:#050D16;
  --gold:#D6B25E;
  --orange:#E9762F;
  --celadon:#6E9C8B;
  --celadon-light:#A8C7BC;
  --bone:#F7F1E3;
  --paper:#FFFDF7;
  --slate:#33475B;
  --gold-deep:#8A6A22;

  --rail-w:250px;
  --font-head:"Noto Serif SC","Songti SC","Source Han Serif SC",serif;
  --font-body:"Noto Sans SC","PingFang SC","Microsoft YaHei",sans-serif;
  --font-mono:ui-monospace,"SFMono-Regular",Menlo,Consolas,"Liberation Mono",monospace;

  --fg:var(--bone);
  --fg-dim:rgba(247,241,227,.68);
  --panel:var(--ink-2);
  --edge:rgba(247,241,227,.16);
  --shadow-hard:8px 8px 0 rgba(5,13,22,.55);
  --ease:cubic-bezier(.22,.61,.36,1);
}

/* ---------- 3. base ---------- */
body{
  min-height:100vh;
  background:var(--ink);
  color:var(--fg);
  font-family:var(--font-body);
  font-size:16.5px;
  line-height:1.9;
  letter-spacing:.01em;
  -webkit-font-smoothing:antialiased;
}
@media (min-width:1024px){
  body{padding-left:var(--rail-w)}
}
@media (max-width:1023px){
  body{padding-top:64px}
}
h1,h2,h3,h4{font-family:var(--font-head);font-weight:700;line-height:1.06;letter-spacing:.012em}
h1{font-size:clamp(2.5rem,5.4vw,5.5rem);line-height:.98}
h2{font-size:clamp(1.75rem,3.4vw,2.85rem)}
h3{font-size:clamp(1.2rem,1.9vw,1.55rem);line-height:1.32}
p{line-height:1.9}
strong{color:var(--gold);font-weight:700}
::selection{background:var(--gold);color:var(--ink-3)}
:where(a,button,summary,input,select,textarea,[tabindex]):focus-visible{
  outline:3px solid var(--gold);
  outline-offset:3px;
}
@media (prefers-reduced-motion:no-preference){
  html{scroll-behavior:smooth}
}

/* ---------- 4. skip link ---------- */
.skip-link{
  position:fixed;
  top:0;left:0;
  z-index:200;
  padding:12px 20px;
  background:var(--gold);
  color:var(--ink-3);
  font-size:13px;
  font-weight:700;
  letter-spacing:.12em;
  transform:translateY(-140%);
  transition:transform .18s var(--ease);
}
.skip-link:focus{transform:translateY(0)}

/* ---------- 5. header / rail ---------- */
.site-header{position:relative;z-index:80}

.rail{
  position:fixed;
  top:0;left:0;bottom:0;
  z-index:80;
  width:var(--rail-w);
  display:flex;
  flex-direction:column;
  gap:24px;
  padding:26px 18px 22px;
  background:var(--ink-3);
  border-right:1px solid rgba(214,178,94,.26);
}
.rail::after{
  content:"";
  position:absolute;
  top:0;right:0;
  width:4px;height:100%;
  background:linear-gradient(180deg,var(--gold),rgba(214,178,94,.12) 48%,var(--gold));
  opacity:.85;
}
.rail__stamp{
  position:absolute;
  top:52%;right:6px;
  transform:translateY(-50%);
  writing-mode:vertical-rl;
  font-size:11px;
  letter-spacing:.42em;
  color:rgba(214,178,94,.5);
  pointer-events:none;
}

.brand{
  display:flex;
  align-items:flex-start;
  gap:12px;
  color:var(--bone);
}
.brand__mark{
  display:grid;
  place-items:center;
  flex:0 0 38px;
  width:38px;height:38px;
  border:1px solid var(--gold);
  color:var(--gold);
  font-family:var(--font-head);
  font-size:19px;
  font-weight:700;
  line-height:1;
  box-shadow:3px 3px 0 rgba(214,178,94,.22);
}
.brand__text{display:flex;flex-direction:column;min-width:0}
.brand__name{
  display:block;
  font-family:var(--font-head);
  font-size:19px;
  font-weight:700;
  letter-spacing:.08em;
  line-height:1.25;
  color:var(--bone);
}
.brand__tag{
  display:block;
  margin-top:7px;
  font-size:11px;
  line-height:1.7;
  letter-spacing:.1em;
  color:rgba(247,241,227,.58);
}

.rail__panel{
  display:flex;
  flex-direction:column;
  gap:22px;
  flex:1 1 auto;
  min-height:0;
}
.rail__nav{flex:1 1 auto;min-height:0}
.nav-list{display:flex;flex-direction:column;gap:2px}
.nav-link{
  display:grid;
  grid-template-columns:24px minmax(0,1fr);
  align-items:baseline;
  gap:10px;
  padding:11px 10px 11px 8px;
  border-left:2px solid transparent;
  color:rgba(247,241,227,.78);
  font-size:15px;
  letter-spacing:.06em;
  transition:background .16s var(--ease),color .16s var(--ease),
             border-color .16s var(--ease),transform .16s var(--ease);
}
.nav-link__idx{
  font-family:var(--font-mono);
  font-size:10px;
  letter-spacing:.1em;
  color:rgba(214,178,94,.62);
  transition:color .16s var(--ease);
}
.nav-link__label{display:block}
.nav-link:hover{
  color:var(--bone);
  background:rgba(214,178,94,.08);
  border-left-color:var(--gold);
  transform:translateX(2px);
}
.nav-link:hover .nav-link__idx{color:var(--gold)}
.nav-link[aria-current="page"]{
  background:var(--gold);
  border-left-color:var(--bone);
  color:var(--ink-3);
  font-weight:700;
  box-shadow:4px 4px 0 rgba(233,118,47,.5);
}
.nav-link[aria-current="page"] .nav-link__idx{color:rgba(5,13,22,.62)}

.rail__foot{
  display:flex;
  flex-direction:column;
  gap:12px;
  padding-top:18px;
  border-top:1px solid rgba(247,241,227,.14);
}
.rail__note{
  font-size:11px;
  line-height:1.75;
  letter-spacing:.12em;
  color:rgba(247,241,227,.52);
}

.nav-toggle{display:none}
.nav-toggle__bars{display:grid;gap:4px;width:18px}
.nav-toggle__bars span{display:block;height:2px;background:currentColor;transition:transform .18s var(--ease)}
.nav-toggle__label{font-size:12px;letter-spacing:.18em}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars span:first-child{transform:translateY(3px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars span:last-child{transform:translateY(-3px) rotate(-45deg)}

/* ---------- 6. buttons ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  min-height:44px;
  padding:12px 20px;
  border:1px solid var(--gold);
  background:transparent;
  color:var(--gold);
  font-family:var(--font-body);
  font-size:14px;
  font-weight:600;
  letter-spacing:.1em;
  line-height:1.2;
  text-align:center;
  transition:background .18s var(--ease),color .18s var(--ease),
             transform .18s var(--ease),box-shadow .18s var(--ease),
             border-color .18s var(--ease);
}
.btn:hover{background:rgba(214,178,94,.14);transform:translateY(-2px)}
.btn:active{transform:translateY(0)}
.btn--gold{
  background:var(--gold);
  border-color:var(--gold);
  color:var(--ink-3);
  box-shadow:4px 4px 0 rgba(5,13,22,.65);
}
.btn--gold:hover{
  background:var(--bone);
  border-color:var(--bone);
  color:var(--ink-3);
  box-shadow:6px 6px 0 rgba(233,118,47,.55);
}
.btn--ghost{border-color:rgba(247,241,227,.42);color:var(--fg)}
.btn--ghost:hover{border-color:var(--gold);color:var(--gold);background:rgba(214,178,94,.08)}
.btn--orange{border-color:var(--orange);color:var(--orange)}
.btn--orange:hover{background:rgba(233,118,47,.14);color:#F79C63}
.btn--block{width:100%}

/* ---------- 7. containers & sections ---------- */
.shell{
  width:100%;
  max-width:1180px;
  margin-inline:auto;
  padding-inline:clamp(18px,4vw,56px);
}
.shell--narrow{max-width:820px}
.prose{max-width:660px}
.prose p+p{margin-top:1.05em}
.prose p{color:var(--fg-dim)}

.section{padding-block:clamp(48px,7vw,96px)}
.section--tight{padding-block:clamp(30px,4vw,56px)}
.section--bone{
  --fg:var(--ink-2);
  --fg-dim:var(--slate);
  --panel:var(--paper);
  --edge:rgba(51,71,91,.22);
  background:var(--bone);
  color:var(--fg);
}
.section__head{
  display:grid;
  gap:14px;
  padding-bottom:clamp(16px,2vw,24px);
  border-bottom:1px solid var(--edge);
  margin-bottom:clamp(24px,3.5vw,44px);
}
.section__title{font-size:clamp(1.7rem,3.3vw,2.8rem)}
.section__lede{font-size:15px;line-height:1.9;color:var(--fg-dim);max-width:42ch}
@media (min-width:780px){
  .section__head{grid-template-columns:minmax(0,1.35fr) minmax(0,1fr);align-items:end;column-gap:clamp(20px,4vw,56px)}
  .section__lede{justify-self:end}
}

.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:10px;
  font-family:var(--font-body);
  font-size:11px;
  font-weight:600;
  letter-spacing:.22em;
  line-height:1.6;
  color:var(--gold);
}
.eyebrow::before{content:"";width:26px;height:1px;background:currentColor}

.rule{
  height:1px;
  background:linear-gradient(90deg,var(--gold),rgba(214,178,94,.12));
}
.rule--gap{margin-block:clamp(26px,4vw,52px)}

/* ---------- 8. grid helpers ---------- */
.grid{display:grid;gap:clamp(16px,2.2vw,28px)}
.grid--12{grid-template-columns:repeat(12,minmax(0,1fr))}
.grid--12>*{grid-column:span 12}
.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-12{grid-column:span 12}
@media (max-width:900px){
  .col-4,.col-5,.col-6,.col-7,.col-8{grid-column:span 12}
}
.stack{display:flex;flex-direction:column;gap:clamp(14px,2vw,24px)}
.cluster{display:flex;flex-wrap:wrap;align-items:center;gap:10px 14px}

/* ---------- 9. cards ---------- */
.card{
  position:relative;
  display:flex;
  flex-direction:column;
  padding:clamp(18px,2.4vw,28px);
  background:var(--panel);
  border:1px solid var(--edge);
  box-shadow:var(--shadow-hard);
  transition:transform .18s var(--ease),border-color .18s var(--ease),
             box-shadow .18s var(--ease);
}
.card:hover,.card:focus-within{
  transform:translateY(-4px);
  border-color:var(--gold);
  box-shadow:10px 10px 0 rgba(214,178,94,.24);
}
.card__index{
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.2em;
  color:var(--gold);
}
.card__title{
  margin-top:10px;
  font-family:var(--font-head);
  font-size:clamp(1.15rem,2vw,1.55rem);
  line-height:1.3;
  color:var(--fg);
}
.card__body{
  margin-top:10px;
  font-size:15px;
  line-height:1.85;
  color:var(--fg-dim);
}
.card__meta{
  margin-top:auto;
  padding-top:16px;
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px;
}
.card--strip{
  flex-direction:row;
  align-items:center;
  gap:clamp(14px,2.4vw,26px);
  border-left:4px solid var(--gold);
  padding-block:clamp(16px,2vw,22px);
}
.card--strip .card__title{margin-top:4px}
.card--strip .card__meta{margin-top:0;padding-top:0;margin-left:auto}

/* ---------- 10. tags ---------- */
.tag{
  display:inline-flex;
  align-items:center;
  padding:4px 10px;
  border:1px solid rgba(247,241,227,.28);
  background:rgba(5,13,22,.35);
  color:rgba(247,241,227,.82);
  font-size:11px;
  letter-spacing:.14em;
  line-height:1.6;
}
.tag--gold{border-color:var(--gold);color:var(--gold)}
.tag--celadon{border-color:var(--celadon);color:var(--celadon-light)}
.tag--orange{border-color:var(--orange);color:#F2965E}

/* ---------- 11. ledger ---------- */
.ledger{display:flex;flex-direction:column;border-top:1px solid var(--edge)}
.ledger__row{
  display:grid;
  grid-template-columns:88px minmax(0,1fr);
  gap:16px;
  padding:16px 0;
  border-bottom:1px solid var(--edge);
}
.ledger__key{
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.12em;
  color:var(--gold);
  line-height:1.8;
}
.ledger__val{font-size:15px;line-height:1.85;color:var(--fg-dim)}
@media (max-width:560px){
  .ledger__row{grid-template-columns:64px minmax(0,1fr);gap:12px}
}

/* ---------- 12. notes & numbers ---------- */
.note{
  padding:10px 0 10px 16px;
  border-left:2px solid var(--celadon);
  font-size:13.5px;
  line-height:1.85;
  color:var(--fg-dim);
}
.rotate-note{
  writing-mode:vertical-rl;
  font-size:11px;
  letter-spacing:.32em;
  color:rgba(214,178,94,.72);
  line-height:1;
}
.bignum{
  font-family:var(--font-mono);
  font-size:clamp(28px,5vw,56px);
  line-height:1;
  letter-spacing:-.02em;
  color:var(--gold);
}

/* ---------- 13. figure (image container base) ---------- */
.figure{margin:0;position:relative}
.figure__frame{
  position:relative;
  overflow:hidden;
  aspect-ratio:16/10;
  border:1px solid rgba(214,178,94,.35);
  background:linear-gradient(135deg,var(--ink-2),var(--ink-3));
  box-shadow:var(--shadow-hard);
}
.figure__frame::before{
  content:"";
  position:absolute;
  inset:0;
  background-image:repeating-linear-gradient(45deg,rgba(214,178,94,.09) 0 1px,transparent 1px 11px);
  pointer-events:none;
}
.figure__img{width:100%;height:100%;object-fit:cover}
.figure__caption{
  margin-top:12px;
  font-size:12px;
  letter-spacing:.1em;
  line-height:1.8;
  color:var(--fg-dim);
}
.figure--wide .figure__frame{aspect-ratio:21/9}
.figure--square .figure__frame{aspect-ratio:1/1}

/* ---------- 14. breadcrumbs ---------- */
.crumbs{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px 10px;
  font-size:11px;
  letter-spacing:.16em;
  line-height:1.8;
  color:rgba(247,241,227,.55);
}
.crumbs a{transition:color .16s var(--ease)}
.crumbs a:hover{color:var(--gold)}
.crumbs__sep{color:rgba(214,178,94,.55)}
.crumbs__current{color:var(--gold)}

/* ---------- 15. light-section adjustments ---------- */
.section--bone .eyebrow,
.section--bone .card__index,
.section--bone .ledger__key,
.section--bone .bignum,
.section--bone .crumbs__current{color:var(--gold-deep)}
.section--bone .rule{background:linear-gradient(90deg,var(--gold-deep),rgba(138,106,34,.12))}
.section--bone .card{box-shadow:8px 8px 0 rgba(51,71,91,.14)}
.section--bone .card:hover,
.section--bone .card:focus-within{box-shadow:10px 10px 0 rgba(138,106,34,.26)}
.section--bone .btn{border-color:var(--gold-deep);color:var(--gold-deep)}
.section--bone .btn:hover{background:rgba(138,106,34,.1)}
.section--bone .btn--gold{background:var(--ink-2);border-color:var(--ink-2);color:var(--bone)}
.section--bone .btn--gold:hover{background:var(--ink-3);border-color:var(--ink-3);color:var(--bone)}
.section--bone .tag{border-color:rgba(51,71,91,.3);background:rgba(51,71,91,.05);color:var(--slate)}
.section--bone .figure__caption{color:var(--slate)}

/* ---------- 16. footer ---------- */
.site-footer{
  position:relative;
  background:var(--ink-3);
  color:rgba(247,241,227,.86);
  border-top:1px solid rgba(214,178,94,.3);
}
.footer__rule{
  height:6px;
  background:linear-gradient(90deg,
    var(--gold) 0 22%,
    var(--orange) 22% 34%,
    var(--celadon) 34% 44%,
    var(--ink-2) 44% 100%);
}
.footer__inner{
  width:100%;
  max-width:1180px;
  margin-inline:auto;
  padding:clamp(34px,5vw,60px) clamp(18px,4vw,56px) 0;
}
.footer__grid{
  display:grid;
  grid-template-columns:1fr;
  gap:clamp(26px,4vw,52px);
}
@media (min-width:860px){
  .footer__grid{grid-template-columns:1.5fr 1fr 1.25fr}
}
.footer__brand{min-width:0}
.footer__name{
  font-family:var(--font-head);
  font-size:clamp(1.4rem,2.6vw,2rem);
  font-weight:700;
  letter-spacing:.1em;
  line-height:1.2;
  color:var(--bone);
}
.footer__summary{
  margin-top:14px;
  max-width:32ch;
  font-size:14px;
  line-height:1.9;
  color:rgba(247,241,227,.64);
}
.footer__col{display:flex;flex-direction:column;min-width:0}
.footer__col-title{
  margin-bottom:14px;
  padding-bottom:10px;
  border-bottom:1px solid rgba(247,241,227,.16);
  font-family:var(--font-body);
  font-size:11px;
  font-weight:600;
  letter-spacing:.24em;
  line-height:1.6;
  color:var(--gold);
}
.footer__list{display:grid;gap:10px}
.footer__link{
  display:inline-flex;
  align-items:center;
  gap:9px;
  padding:2px 0;
  border-bottom:1px solid transparent;
  font-size:14px;
  letter-spacing:.06em;
  color:rgba(247,241,227,.8);
  transition:color .16s var(--ease),border-color .16s var(--ease);
}
.footer__link::before{content:"—";font-size:11px;color:var(--gold)}
.footer__link:hover{color:var(--gold);border-bottom-color:rgba(214,178,94,.6)}
.footer__contact{display:grid;gap:8px}
.footer__contact-row{
  display:grid;
  grid-template-columns:38px minmax(0,1fr);
  gap:10px;
  padding:5px 0;
  font-size:13.5px;
  line-height:1.8;
}
.footer__label{
  font-family:var(--font-mono);
  font-size:10px;
  letter-spacing:.16em;
  color:rgba(214,178,94,.82);
  padding-top:4px;
}
.footer__value{color:rgba(247,241,227,.84);word-break:break-word}
.footer__note{
  margin-top:14px;
  max-width:36ch;
  font-size:12px;
  line-height:1.85;
  color:rgba(247,241,227,.48);
}
.footer__bottom{
  margin-top:clamp(28px,4vw,48px);
  padding-block:18px 26px;
  border-top:1px solid rgba(247,241,227,.14);
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:10px 24px;
  font-size:12px;
  letter-spacing:.08em;
  color:rgba(247,241,227,.52);
}
.footer__icp{font-family:var(--font-mono);letter-spacing:.06em}
.footer__copy{color:rgba(247,241,227,.52)}

/* ---------- 17. JS-created UI ---------- */
.read-progress{
  position:fixed;
  top:0;left:0;right:0;
  height:3px;
  z-index:120;
  background:rgba(5,13,22,.55);
  pointer-events:none;
}
@media (min-width:1024px){
  .read-progress{left:var(--rail-w)}
}
.read-progress__bar{
  width:0;
  height:100%;
  background:linear-gradient(90deg,var(--gold),var(--orange));
  transition:width .1s linear;
}
.to-top{
  position:fixed;
  right:18px;bottom:18px;
  z-index:110;
  display:grid;
  place-items:center;
  width:48px;height:48px;
  border:1px solid var(--gold);
  background:var(--ink-3);
  color:var(--gold);
  font-size:17px;
  line-height:1;
  box-shadow:4px 4px 0 rgba(214,178,94,.22);
  opacity:0;
  visibility:hidden;
  transform:translateY(8px);
  transition:opacity .2s var(--ease),transform .2s var(--ease),
             visibility .2s var(--ease),background .2s var(--ease),
             color .2s var(--ease);
}
.to-top.is-on{opacity:1;visibility:visible;transform:none}
.to-top:hover{background:var(--gold);color:var(--ink-3)}

.reveal{
  opacity:0;
  transform:translateY(16px);
  transition:opacity .55s var(--ease),transform .55s var(--ease);
}
.reveal.is-in{opacity:1;transform:none}

/* ---------- 18. mobile header ---------- */
@media (max-width:1023px){
  .site-header{
    position:fixed;
    top:0;left:0;right:0;
    z-index:90;
  }
  .rail{
    position:static;
    width:auto;
    height:64px;
    flex-direction:row;
    align-items:center;
    gap:12px;
    padding:0 16px;
    border-right:0;
    border-bottom:1px solid rgba(214,178,94,.32);
  }
  .rail::after{display:none}
  .rail__stamp{display:none}
  .brand{align-items:center;gap:10px;min-width:0}
  .brand__mark{flex:0 0 32px;width:32px;height:32px;font-size:16px;box-shadow:2px 2px 0 rgba(214,178,94,.22)}
  .brand__name{font-size:16px;letter-spacing:.06em}
  .brand__tag{display:none}

  .nav-toggle{
    display:inline-flex;
    align-items:center;
    gap:10px;
    margin-left:auto;
    min-height:44px;
    padding:8px 12px;
    border:1px solid rgba(214,178,94,.5);
    color:var(--gold);
    transition:background .16s var(--ease),border-color .16s var(--ease);
  }
  .nav-toggle:hover{background:rgba(214,178,94,.12);border-color:var(--gold)}

  .rail__panel{
    position:absolute;
    top:100%;left:0;right:0;
    display:none;
    flex-direction:column;
    gap:18px;
    padding:16px 16px 24px;
    background:var(--ink-3);
    border-bottom:4px solid var(--gold);
    box-shadow:0 26px 44px rgba(0,0,0,.6);
    max-height:calc(100vh - 64px);
    overflow:auto;
    flex:0 0 auto;
  }
  .site-header[data-open="true"] .rail__panel{display:flex}
  .rail__nav{flex:0 0 auto}
  .nav-link{padding:14px 10px;font-size:16px;border-left-width:3px}
  .rail__foot{padding-top:14px}
  .rail__note{color:rgba(247,241,227,.62)}
}

/* ---------- 19. reduced motion ---------- */
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
    scroll-behavior:auto !important;
  }
  .reveal{opacity:1 !important;transform:none !important}
  .card:hover,.card:focus-within{transform:none}
  .btn:hover{transform:none}
  .nav-link:hover{transform:none}
}