/* ==========================================================================
   /assets/site.css — 大发彩票主站 · 共享外壳样式
   设计逻辑：宣纸账本 + 1px 木色格线 + 等宽数字 + 锐利直角
   ========================================================================== */

:root{
  --paper:#F6F0E2;
  --paper-deep:#EDE2C8;
  --ink:#2A211B;
  --ink-soft:#3A302A;
  --wood:#8B5A2B;
  --dice:#C0392B;
  --gold:#C9A227;
  --teal:#2F7E7B;
  --seal:#9B2C22;
  --grid:#C9BEA6;
  --night:#14100D;

  --font-display:"Noto Serif SC","Source Han Serif SC","Songti SC",Georgia,"Times New Roman",serif;
  --font-sans:"Noto Sans SC","Source Han Sans SC","PingFang SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  --font-mono:"JetBrains Mono","Roboto Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;

  --header-h:72px;
  --shell:1520px;
  --module:96px;
  --step:8px;
  --hair:1px solid var(--grid);
  --line:1px solid var(--wood);
}

/* ---------- reset ---------- */
*,*::before,*::after{box-sizing:border-box;}
html{
  -webkit-text-size-adjust:100%;
  scroll-behavior:smooth;
  scroll-padding-top:calc(var(--header-h) + 24px);
}
body,h1,h2,h3,h4,p,ul,ol,figure,blockquote{margin:0;}
ul,ol{padding:0;list-style:none;}
img,svg{display:block;max-width:100%;}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer;}
a{color:inherit;}
table{border-collapse:collapse;width:100%;}

/* ---------- base ---------- */
body{
  min-height:100vh;
  background-color:var(--paper);
  background-image:
    linear-gradient(90deg,rgba(201,190,166,.30) 1px,transparent 1px),
    linear-gradient(0deg,rgba(201,190,166,.30) 1px,transparent 1px);
  background-size:24px 24px;
  color:var(--ink-soft);
  font-family:var(--font-sans);
  font-size:15px;
  line-height:1.85;
  font-weight:400;
  letter-spacing:.01em;
}
body.nav-locked{overflow:hidden;}

:focus-visible{outline:2px solid var(--dice);outline-offset:2px;}

.skip-link{
  position:absolute;top:-120px;left:12px;z-index:1200;
  padding:10px 18px;
  background:var(--night);color:var(--paper);
  font-size:13px;letter-spacing:.08em;text-decoration:none;
  border:1px solid var(--gold);
}
.skip-link:focus{top:12px;}

/* ---------- typography ---------- */
.display-xl{
  font-family:var(--font-display);
  font-weight:300;
  font-size:clamp(2.6rem,5vw,4.6rem);
  line-height:1.05;
  letter-spacing:-.01em;
  color:var(--ink);
}
.section-title{
  font-family:var(--font-sans);
  font-weight:500;
  font-size:1.5rem;
  line-height:1.35;
  color:var(--ink);
  margin-bottom:.5em;
}
.sub-title{
  font-family:var(--font-sans);
  font-weight:500;
  font-size:1.15rem;
  line-height:1.5;
  color:var(--ink);
}
.index-label{
  display:inline-block;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.18em;
  text-transform:uppercase;
  color:var(--wood);
}
.num{
  font-family:var(--font-mono);
  font-variant-numeric:tabular-nums;
  font-feature-settings:"tnum" 1;
  letter-spacing:-.01em;
}
.ball-num{
  display:inline-flex;align-items:center;justify-content:center;
  min-width:2.1em;padding:.18em .34em;
  border:1px solid var(--ink);
  background:var(--gold);color:var(--ink);
  font-family:var(--font-mono);
  font-variant-numeric:tabular-nums;
  font-weight:700;font-size:1.32rem;line-height:1;
}
.prose{font-size:15px;line-height:1.85;color:var(--ink-soft);}
.prose p{margin-bottom:1.2em;}
.prose h2{margin:2.4em 0 .6em;}
.prose h3{margin:1.8em 0 .5em;}
.prose a{color:var(--seal);text-decoration:underline;text-underline-offset:3px;}

/* ---------- layout ---------- */
.shell{
  width:100%;max-width:var(--shell);
  margin:0 auto;padding:0 32px;
}
.shell--split{display:flex;gap:32px;align-items:flex-start;}
.site-main{display:block;padding-top:var(--header-h);}
.site-main--overlay{padding-top:0;}
.stack>*+*{margin-top:var(--module);}
.grid-12{
  display:grid;
  grid-template-columns:repeat(12,minmax(0,1fr));
  gap:24px;
}
.section-rule{height:1px;background:var(--wood);border:0;margin:0;}

/* ---------- ledger axis (左侧纵向章节轴) ---------- */
.ledger-axis{
  position:sticky;top:calc(var(--header-h) + 24px);
  flex:0 0 208px;width:208px;
  align-self:flex-start;
  padding-right:20px;
  border-right:var(--line);
}
.axis-title{
  font-family:var(--font-mono);
  font-size:11px;letter-spacing:.18em;
  color:var(--wood);margin-bottom:14px;
}
.axis-list{border-top:var(--hair);}
.axis-link{
  position:relative;display:block;
  padding:9px 0 9px 14px;
  border-bottom:var(--hair);
  font-size:13.5px;line-height:1.4;
  color:var(--ink-soft);text-decoration:none;
  transition:color .16s ease;
}
.axis-link::before{
  content:"";position:absolute;left:0;top:50%;
  width:2px;height:0;background:var(--seal);
  transform:translateY(-50%);
  transition:height .16s ease;
}
.axis-link:hover{color:var(--ink);background:rgba(237,226,200,.6);}
.axis-link[data-current="true"]{color:var(--seal);}
.axis-link[data-current="true"]::before{height:72%;}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:.5em;
  padding:11px 20px;
  border:1px solid var(--wood);
  background:transparent;color:var(--ink);
  font-size:14px;letter-spacing:.04em;text-decoration:none;
  transition:background-color .18s ease,color .18s ease,border-color .18s ease;
}
.btn--primary{background:var(--dice);border-color:var(--dice);color:var(--paper);}
.btn--primary:hover{background:var(--seal);border-color:var(--seal);}
.btn--ghost:hover{background:var(--paper-deep);border-color:var(--ink);}

/* ---------- cards / tables / tags ---------- */
.ledger-card{
  background:var(--paper);
  border:1px solid var(--wood);
  padding:24px;
}
.ledger-card--deep{background:var(--paper-deep);}
.tag{
  display:inline-block;
  padding:2px 8px;
  border:1px solid var(--grid);
  background:var(--paper-deep);
  color:var(--seal);
  font-size:11px;letter-spacing:.18em;
}
.ledger-table{font-size:14px;}
.ledger-table th{
  background:var(--paper-deep);
  border-bottom:1px solid var(--wood);
  padding:10px 12px;
  text-align:left;
  font-family:var(--font-sans);font-weight:500;font-size:12px;
  letter-spacing:.12em;color:var(--ink);
  white-space:nowrap;
}
.ledger-table td{
  border-bottom:var(--hair);
  padding:10px 12px;
  vertical-align:middle;
}
.ledger-table tbody tr:nth-child(even){background:rgba(237,226,200,.55);}

/* ---------- media frame（页面阶段放置图片） ---------- */
.media-frame{
  position:relative;width:100%;
  overflow:hidden;
  background:var(--paper-deep);
  border:1px solid var(--wood);
}
.media-frame>img{
  width:100%;height:100%;
  object-fit:cover;
  filter:sepia(.12) contrast(1.04) saturate(.94);
}
.media-frame::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:
    linear-gradient(90deg,rgba(201,190,166,.45) 1px,transparent 1px),
    linear-gradient(0deg,rgba(201,190,166,.45) 1px,transparent 1px);
  background-size:24px 24px;
}
.media-frame--wide{aspect-ratio:16/7;}
.media-frame--square{aspect-ratio:1/1;}
.media-frame--tall{aspect-ratio:3/4;}
.figure-cap{
  margin-top:10px;
  font-family:var(--font-mono);
  font-size:11px;letter-spacing:.18em;color:var(--wood);
}

/* ---------- breadcrumb ---------- */
.breadcrumb{
  display:flex;flex-wrap:wrap;gap:8px;
  padding:14px 0;
  border-bottom:var(--hair);
  font-family:var(--font-mono);
  font-size:11px;letter-spacing:.18em;color:var(--wood);
}
.breadcrumb a{text-decoration:none;color:var(--ink-soft);}
.breadcrumb a:hover{color:var(--dice);}
.breadcrumb span[aria-current="page"]{color:var(--seal);}

/* ==========================================================================
   HEADER
   ========================================================================== */
.site-header{
  position:fixed;top:0;left:0;right:0;z-index:900;
  height:var(--header-h);
  background:linear-gradient(180deg,rgba(246,240,226,.94) 0%,rgba(246,240,226,.62) 62%,rgba(246,240,226,0) 100%);
  border-bottom:1px solid transparent;
  transition:background-color .22s ease,border-color .22s ease;
}
.site-header.is-solid,
.site-header.is-nav-open{
  background:var(--paper);
  border-bottom:1px solid var(--wood);
}
.header-frame{
  width:100%;max-width:var(--shell);
  height:100%;margin:0 auto;
  padding:0 32px;
  display:flex;align-items:center;gap:28px;
}

.brand-mark{
  display:flex;flex-direction:column;justify-content:center;gap:2px;
  text-decoration:none;
  padding-right:20px;
  border-right:var(--line);
  flex:0 0 auto;
}
.brand-name{
  font-family:var(--font-display);
  font-weight:400;
  font-size:19px;line-height:1.1;
  letter-spacing:.06em;color:var(--ink);
}
.brand-icp{
  font-family:var(--font-mono);
  font-size:10px;letter-spacing:.16em;
  color:var(--wood);
}

.site-nav{flex:1 1 auto;display:flex;justify-content:center;}
.nav-list{display:flex;align-items:center;gap:24px;}
.nav-list a{
  position:relative;display:inline-block;
  padding:6px 2px;
  font-size:15px;letter-spacing:.03em;
  color:var(--ink);text-decoration:none;
  white-space:nowrap;
}
.nav-list a::after{
  content:"";position:absolute;left:0;right:0;bottom:0;
  height:1px;background:var(--wood);
  transform:scaleX(0);transform-origin:left;
  transition:transform .18s ease;
}
.nav-list a:hover{color:var(--seal);}
.nav-list a:hover::after{transform:scaleX(1);}
.nav-list a[aria-current="page"]{color:var(--seal);}
.nav-list a[aria-current="page"]::after{
  height:2px;background:var(--seal);transform:scaleX(1);
}

.header-actions{display:flex;align-items:center;gap:14px;flex:0 0 auto;}
.btn-cta{
  display:inline-flex;align-items:center;justify-content:center;
  padding:9px 18px;
  border:1px solid var(--dice);
  background:transparent;color:var(--dice);
  font-size:14px;letter-spacing:.06em;text-decoration:none;
  transition:background-color .18s ease,color .18s ease;
}
.btn-cta:hover{background:var(--dice);color:var(--paper);}

.nav-toggle{
  display:none;
  align-items:center;gap:8px;
  padding:8px 12px;
  border:1px solid var(--wood);
  color:var(--ink);
  transition:background-color .18s ease;
}
.nav-toggle:hover{background:var(--paper-deep);}
.nav-toggle-glyph{font-size:18px;line-height:1;}
.nav-toggle-text{font-size:12px;letter-spacing:.18em;}

.nav-scrim{
  position:fixed;inset:var(--header-h) 0 0 0;
  background:rgba(20,16,13,.5);
  opacity:0;pointer-events:none;
  transition:opacity .22s ease;
}
.site-header.is-nav-open .nav-scrim{opacity:1;pointer-events:auto;}

/* ==========================================================================
   FOOTER
   ========================================================================== */
.site-footer{
  margin-top:var(--module);
  background:var(--night);
  color:var(--paper);
  border-top:2px solid var(--wood);
}
.footer-grid{
  display:grid;
  grid-template-columns:1.25fr 1fr 1.15fr 1.35fr;
}
.footer-col{
  padding:38px 28px 34px;
  border-left:1px solid rgba(139,90,43,.85);
}
.footer-col:first-child{border-left:0;padding-left:0;}
.footer-title{
  font-family:var(--font-mono);
  font-size:11px;font-weight:400;
  letter-spacing:.18em;text-transform:uppercase;
  color:var(--gold);
  padding-bottom:12px;margin-bottom:16px;
  border-bottom:1px solid rgba(139,90,43,.85);
}
.footer-lead{
  font-family:var(--font-display);
  font-size:1.35rem;font-weight:400;line-height:1.3;
  color:var(--paper);margin-bottom:10px;
}
.footer-meta,.footer-copy,.footer-icp{
  font-family:var(--font-mono);
  font-size:11px;letter-spacing:.16em;
  color:var(--grid);
}
.footer-meta{margin-top:6px;}
.footer-plain{
  font-size:13.5px;line-height:1.8;
  color:rgba(246,240,226,.78);
}
.footer-list li+li{margin-top:9px;}
.footer-list a{
  display:inline-block;
  font-size:13.5px;
  color:rgba(246,240,226,.82);
  text-decoration:none;
  border-bottom:1px solid transparent;
  transition:color .16s ease,border-color .16s ease;
}
.footer-list a:hover{color:var(--gold);border-bottom-color:var(--gold);}
.footer-base{
  display:flex;flex-wrap:wrap;justify-content:space-between;gap:12px;
  padding:18px 0 26px;
  border-top:1px solid rgba(139,90,43,.85);
}

/* ---------- to top ---------- */
.to-top{
  position:fixed;right:24px;bottom:24px;z-index:880;
  padding:10px 16px;
  border:1px solid var(--wood);
  background:var(--paper);color:var(--ink);
  font-size:12px;letter-spacing:.14em;
  opacity:0;visibility:hidden;transform:translateY(8px);
  transition:opacity .22s ease,transform .22s ease,visibility .22s ease;
}
.to-top[data-visible="true"]{opacity:1;visibility:visible;transform:none;}
.to-top:hover{background:var(--paper-deep);}

/* ---------- reveal ---------- */
[data-reveal]{transition:opacity .24s ease,transform .24s ease;}
.js [data-reveal]{opacity:0;transform:translateY(8px);}
.js [data-reveal].is-revealed{opacity:1;transform:none;}

/* ==========================================================================
   RESPONSIVE
   ========================================================================== */
@media (max-width:1279px){
  .shell{padding:0 24px;}
  .header-frame{padding:0 24px;gap:18px;}
  .nav-list{gap:16px;}
  .nav-list a{font-size:14px;}
  .brand-icp{display:none;}
}

@media (max-width:1023px){
  :root{--header-h:64px;--module:64px;}
  .shell--split{display:block;}
  .ledger-axis{
    position:static;width:auto;flex:none;
    padding:0 0 14px;border-right:0;
    border-bottom:var(--hair);
    margin-bottom:28px;
  }
  .axis-list{
    display:flex;gap:10px;overflow-x:auto;
    border-top:0;padding-bottom:4px;
    -webkit-overflow-scrolling:touch;
  }
  .axis-link{
    border:1px solid var(--grid);
    padding:7px 12px;white-space:nowrap;
  }
  .axis-link::before{display:none;}
  .axis-link[data-current="true"]{border-color:var(--seal);background:var(--paper-deep);}

  .nav-toggle{display:inline-flex;}
  .site-nav{
    position:fixed;
    top:var(--header-h);right:0;
    width:min(340px,86vw);
    height:calc(100vh - var(--header-h));
    background:var(--paper-deep);
    border-left:1px solid var(--wood);
    padding:18px 22px 48px;
    overflow-y:auto;
    transform:translateX(101%);
    transition:transform .24s ease;
    z-index:901;
  }
  .site-nav[data-open]{transform:translateX(0);}
  .nav-list{flex-direction:column;align-items:stretch;gap:0;}
  .nav-list a{
    display:block;padding:14px 2px;
    font-size:16px;
    border-bottom:var(--hair);
  }
  .nav-list a::after{display:none;}
  .nav-list a[aria-current="page"]{
    color:var(--seal);
    box-shadow:inset 2px 0 0 var(--seal);
    padding-left:12px;
  }
  .header-frame{gap:12px;}
  .brand-mark{border-right:0;padding-right:0;}
  .header-actions{margin-left:auto;}

  .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
  .footer-col{padding:28px 20px;}
  .footer-col:nth-child(odd){border-left:0;padding-left:0;}
  .footer-col:nth-child(n+3){border-top:1px solid rgba(139,90,43,.85);}
}

@media (max-width:767px){
  :root{--module:48px;}
  body{font-size:14.5px;}
  .shell{padding:0 18px;}
  .header-frame{padding:0 18px;}
  .brand-name{font-size:16.5px;}
  .btn-cta{padding:8px 12px;font-size:13px;}
  .nav-toggle-text{display:none;}
  .grid-12{grid-template-columns:repeat(4,minmax(0,1fr));gap:16px;}
  .ledger-card{padding:18px;}
  .footer-grid{grid-template-columns:1fr;}
  .footer-col{
    padding:22px 0;
    border-left:0;
    border-top:1px solid rgba(139,90,43,.85);
  }
  .footer-col:first-child{border-top:0;padding-top:26px;}
  .ledger-table{font-size:13px;}
  .ledger-table th,.ledger-table td{padding:8px 8px;}
  .to-top{right:14px;bottom:14px;padding:9px 13px;}
}

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