/* ============================================================
   多宝体育看台 · 共享样式 /assets/site.css
   城市夜光 + 赛场信号 · 左右分屏 · 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{margin:0;}
ul,ol{padding:0;list-style:none;}
img,picture,svg,video{display:block;max-width:100%;height:auto;}
a{color:inherit;text-decoration:none;}
button{font:inherit;color:inherit;background:transparent;border:0;padding:0;cursor:pointer;}
table{border-collapse:collapse;width:100%;}
::selection{background:var(--signal);color:var(--ink);}

/* ---------- tokens ---------- */
:root{
  --ink:#07130F;          /* 通道夜黑 */
  --pit:#0E2A22;          /* 看台墨绿 */
  --paper:#F4F1E8;        /* 米白纸面 */
  --paper-dim:#E8E4D8;
  --concrete:#B9B7B0;     /* 看台混凝土灰 */
  --moss:#4F6B57;         /* 苔绿 */
  --slate:#3A3F3C;        /* 岩灰 */
  --signal:#C8FF3D;       /* 信号黄绿 */
  --orange:#E4622A;       /* 跑道橙 */
  --red:#E23A3A;          /* 比分牌红 */

  --line-dark:rgba(244,241,232,.18);
  --line-dark-soft:rgba(244,241,232,.08);
  --line-light:rgba(58,63,60,.22);
  --paper-72:rgba(244,241,232,.72);
  --paper-60:rgba(244,241,232,.60);

  --font-display:"Archivo Narrow","Arial Narrow","Haettenschweiler","PingFang SC","Microsoft YaHei",sans-serif;
  --font-body:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  --font-mono:ui-monospace,SFMono-Regular,Menlo,Consolas,"Courier New",monospace;

  --w-max:1320px;
  --pad:clamp(16px,3vw,40px);
  --gap:clamp(14px,1.8vw,26px);
  --radius-0:0;
}

/* ---------- base ---------- */
body{
  background:var(--paper);
  color:var(--slate);
  font-family:var(--font-body);
  font-size:16.5px;
  line-height:1.75;
  font-weight:400;
  letter-spacing:.01em;
}
h1,h2,h3,h4{font-family:var(--font-display);font-weight:700;line-height:1.12;letter-spacing:-.01em;color:var(--ink);}
h1{font-size:clamp(32px,5vw,52px);}
h2{font-size:clamp(24px,3vw,30px);}
h3{font-size:clamp(19px,2vw,22px);}
p{max-width:40em;}
strong{font-weight:700;color:var(--ink);}
#main-content{display:block;scroll-margin-top:132px;}
.center-stage{max-width:var(--w-max);margin-inline:auto;padding-inline:var(--pad);}

:focus-visible{outline:2px solid var(--orange);outline-offset:3px;}
.site-header :focus-visible,.site-footer :focus-visible{outline:2px solid var(--signal);outline-offset:3px;}

/* ---------- skip link ---------- */
.skip-link{
  position:fixed;top:0;left:0;z-index:200;
  padding:12px 20px;
  background:var(--signal);color:var(--ink);
  font-family:var(--font-mono);font-size:12px;letter-spacing:.14em;text-transform:uppercase;
  transform:translateY(-130%);
  transition:transform .18s ease;
}
.skip-link:focus{transform:translateY(0);}

/* ---------- header / masthead ---------- */
.site-header{
  position:sticky;top:0;z-index:80;
  background:var(--ink);
  color:var(--paper);
  border-bottom:1px solid var(--line-dark);
}
.read-progress{
  position:absolute;left:0;right:0;bottom:-1px;height:2px;
  background:rgba(244,241,232,.10);
  pointer-events:none;
}
.read-progress__bar{display:block;height:100%;width:0;background:var(--signal);}

.masthead{background:var(--ink);}
.masthead__inner{
  display:grid;
  grid-template-columns:1fr auto 1fr;
  align-items:center;
  gap:16px;
  max-width:var(--w-max);
  margin-inline:auto;
  padding:14px var(--pad) 12px;
}
.masthead__side{display:flex;align-items:center;gap:10px;min-width:0;}
.masthead__side--start{justify-content:flex-start;}
.masthead__side--end{justify-content:flex-end;}
.masthead__meta{
  font-family:var(--font-mono);font-size:10.5px;letter-spacing:.16em;text-transform:uppercase;
  color:rgba(185,183,176,.82);white-space:nowrap;
}
.masthead__meta-sep{margin-inline:6px;color:var(--moss);}
.masthead__brand{display:flex;justify-content:center;text-align:center;}

.brand{display:inline-flex;flex-direction:column;align-items:center;gap:5px;color:var(--paper);}
.brand__name{
  font-family:var(--font-display);font-weight:700;
  font-size:clamp(19px,2.5vw,30px);
  letter-spacing:.14em;line-height:1;
  transition:color .18s ease;
}
.brand__tagline{
  font-family:var(--font-mono);font-size:10px;letter-spacing:.26em;
  text-transform:uppercase;color:rgba(185,183,176,.86);line-height:1;
}
.brand:hover .brand__name,.brand:focus-visible .brand__name{color:var(--signal);}

/* nav toggle */
.nav-toggle{
  display:none;align-items:center;gap:9px;
  padding:8px 11px;border:1px solid rgba(244,241,232,.28);
  font-family:var(--font-mono);font-size:10.5px;letter-spacing:.16em;text-transform:uppercase;
  color:var(--paper);
  transition:border-color .18s ease,color .18s ease;
}
.nav-toggle__bars{display:grid;gap:3px;width:14px;}
.nav-toggle__bars span{display:block;height:1.5px;background:currentColor;transition:opacity .16s ease;}
.nav-toggle:hover{border-color:var(--signal);color:var(--signal);}
.nav-toggle[aria-expanded="true"]{border-color:var(--signal);color:var(--signal);background:rgba(200,255,61,.08);}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars span:nth-child(2){opacity:0;}

/* status bar */
.status-bar{border-top:1px solid var(--line-dark-soft);background:var(--ink);}
.status-bar__inner{
  display:flex;flex-wrap:wrap;align-items:center;gap:6px 22px;
  max-width:var(--w-max);margin-inline:auto;
  padding:7px var(--pad);
  font-family:var(--font-mono);font-size:10.5px;letter-spacing:.12em;text-transform:uppercase;
  color:rgba(185,183,176,.86);
}
.status-item{display:inline-flex;align-items:center;gap:8px;max-width:none;}
.status-item--mono{font-variant-numeric:tabular-nums;}
.status-dot{
  width:6px;height:6px;border-radius:50%;flex:none;
  background:var(--signal);box-shadow:0 0 0 3px rgba(200,255,61,.16);
  animation:dotPulse 2.8s ease-in-out infinite;
}
@keyframes dotPulse{0%,100%{opacity:1;}50%{opacity:.35;}}

/* nav */
.site-nav{background:var(--pit);border-top:1px solid var(--line-dark-soft);}
.site-nav__inner{
  display:flex;align-items:center;justify-content:center;flex-wrap:wrap;
  max-width:var(--w-max);margin-inline:auto;padding-inline:var(--pad);
}
.nav-list{display:flex;flex-wrap:wrap;justify-content:center;}
.nav-item{border-right:1px solid var(--line-dark-soft);}
.nav-item:first-child{border-left:1px solid var(--line-dark-soft);}
.nav-link{
  position:relative;display:block;padding:13px 20px;
  font-family:var(--font-mono);font-size:11.5px;letter-spacing:.16em;text-transform:uppercase;
  color:rgba(244,241,232,.82);
  transition:color .18s ease;
}
.nav-link::after{
  content:"";position:absolute;left:20px;right:20px;bottom:8px;height:2px;
  background:var(--signal);transform:scaleX(0);transform-origin:left center;
  transition:transform .22s cubic-bezier(.2,.7,.3,1);
}
.nav-link:hover{color:var(--paper);}
.nav-link:hover::after{transform:scaleX(1);}
.nav-link[aria-current="page"]{color:var(--signal);}
.nav-link[aria-current="page"]::after{transform:scaleX(1);}
.site-nav__cta{display:none;}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:11px 18px;border:1px solid transparent;border-radius:0;
  font-family:var(--font-mono);font-size:11.5px;letter-spacing:.14em;text-transform:uppercase;
  line-height:1.2;white-space:nowrap;
  transition:background-color .18s ease,color .18s ease,border-color .18s ease,transform .18s ease;
}
.btn--signal{background:var(--signal);color:var(--ink);border-color:var(--signal);}
.btn--signal:hover,.btn--signal:focus-visible{background:transparent;color:var(--signal);}
.btn--ghost{border-color:rgba(244,241,232,.38);color:var(--paper);}
.btn--ghost:hover,.btn--ghost:focus-visible{border-color:var(--signal);color:var(--signal);background:rgba(200,255,61,.08);}
.btn--outline{border-color:var(--slate);color:var(--slate);}
.btn--outline:hover,.btn--outline:focus-visible{background:var(--slate);border-color:var(--slate);color:var(--paper);}
.btn--sm{padding:9px 14px;font-size:10.5px;letter-spacing:.12em;}

/* ---------- layout ---------- */
.container{width:100%;max-width:var(--w-max);margin-inline:auto;padding-inline:var(--pad);}
.grid{display:grid;grid-template-columns:repeat(12,minmax(0,1fr));gap:var(--gap);}
.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;}

.split{display:grid;grid-template-columns:38fr 62fr;align-items:stretch;}
.split--30{grid-template-columns:30fr 70fr;}
.split__aside,.split__main{min-width:0;}

.panel--dark{background:var(--pit);color:var(--paper);}
.panel--dark h1,.panel--dark h2,.panel--dark h3,.panel--dark strong{color:var(--paper);}
.panel--paper{background:var(--paper);color:var(--slate);}

/* ---------- breadcrumbs ---------- */
.breadcrumbs{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px;
  font-family:var(--font-mono);font-size:10.5px;letter-spacing:.14em;text-transform:uppercase;
  color:rgba(58,63,60,.62);
}
.breadcrumbs__link{color:rgba(58,63,60,.72);transition:color .16s ease;}
.breadcrumbs__link:hover{color:var(--orange);}
.breadcrumbs__sep{color:var(--moss);}
.breadcrumbs [aria-current="page"]{color:var(--slate);}

/* ---------- small parts ---------- */
.mono{font-family:var(--font-mono);font-variant-numeric:tabular-nums;letter-spacing:.08em;}

.section-label{
  display:inline-flex;align-items:center;gap:.6em;
  font-family:var(--font-mono);font-size:10.5px;letter-spacing:.2em;text-transform:uppercase;
  color:var(--orange);
}
.section-label::before{content:"";width:7px;height:7px;background:var(--orange);flex:none;}
.section-label--dark{color:var(--signal);}
.section-label--dark::before{background:var(--signal);}

.rule{border:0;height:1px;background:var(--line-light);margin-block:clamp(20px,3vw,34px);}
.rule--dark{background:var(--line-dark);}

.tag{
  display:inline-flex;align-items:center;gap:6px;
  padding:3px 9px;border:1px solid currentColor;border-radius:0;
  font-family:var(--font-mono);font-size:10.5px;letter-spacing:.14em;text-transform:uppercase;
  color:var(--moss);line-height:1.5;
}
.tag--signal{color:var(--signal);}
.tag--orange{color:var(--orange);}
.tag--red{color:var(--red);}
.tag--solid{background:var(--signal);border-color:var(--signal);color:var(--ink);}

.stat{
  display:block;font-family:var(--font-display);font-weight:700;
  font-size:clamp(48px,8vw,112px);line-height:.86;letter-spacing:-.02em;
  color:var(--ink);font-variant-numeric:tabular-nums;
}
.stat--signal{color:var(--signal);}

/* 框景：直角刻度边框 */
.frame{position:relative;border:1px solid var(--line-light);}
.frame::before,.frame::after{content:"";position:absolute;width:14px;height:14px;border:1px solid var(--orange);pointer-events:none;}
.frame::before{top:-1px;left:-1px;border-right:0;border-bottom:0;}
.frame::after{bottom:-1px;right:-1px;border-left:0;border-top:0;}
.frame--dark{border-color:var(--line-dark);}
.frame--dark::before,.frame--dark::after{border-color:var(--signal);}

/* 图片容器基础规则（页面阶段放入 img 占位） */
.media-frame{
  position:relative;display:block;overflow:hidden;isolation:isolate;
  border:1px solid var(--line-light);
  background:
    linear-gradient(160deg,var(--pit) 0%,var(--ink) 58%,#16332A 100%);
}
.media-frame img{width:100%;height:100%;object-fit:cover;filter:saturate(.92) contrast(1.04);}
.media-frame::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:repeating-linear-gradient(to bottom,rgba(7,19,15,.34) 0 1px,transparent 1px 4px);
  opacity:.55;
}
.media-frame--wide{aspect-ratio:16/9;}
.media-frame--land{aspect-ratio:4/3;}
.media-frame--port{aspect-ratio:3/4;}
.media-frame--square{aspect-ratio:1/1;}
.media-frame--empty{
  background-image:
    repeating-linear-gradient(to right,rgba(244,241,232,.10) 0 1px,transparent 1px 46px),
    repeating-linear-gradient(to bottom,rgba(244,241,232,.10) 0 1px,transparent 1px 46px),
    linear-gradient(160deg,var(--pit) 0%,var(--ink) 100%);
}
.media-frame__cap{
  position:absolute;left:0;bottom:0;z-index:2;
  padding:8px 12px;
  background:var(--ink);color:var(--paper);
  font-family:var(--font-mono);font-size:10.5px;letter-spacing:.14em;text-transform:uppercase;
}

/* 侧边章节索引 */
.rail{font-family:var(--font-mono);}
.rail__list{display:grid;gap:0;}
.rail__link{
  display:flex;align-items:center;gap:10px;
  padding:9px 0;border-bottom:1px solid var(--line-light);
  font-size:11.5px;letter-spacing:.12em;text-transform:uppercase;
  color:rgba(58,63,60,.66);
  transition:color .16s ease,padding-left .16s ease;
}
.rail__link::before{content:"";width:6px;height:6px;flex:none;background:transparent;border:1px solid currentColor;}
.rail__link:hover{color:var(--slate);padding-left:4px;}
.rail__link[aria-current="true"]{color:var(--ink);}
.rail__link[aria-current="true"]::before{background:var(--signal);border-color:var(--signal);}
.rail--dark .rail__link{color:rgba(244,241,232,.62);border-bottom-color:var(--line-dark);}
.rail--dark .rail__link[aria-current="true"]{color:var(--paper);}

/* ---------- reveal ---------- */
.has-js [data-reveal]{opacity:0;transform:translateX(-12px);}
.has-js [data-reveal].is-in{
  opacity:1;transform:none;
  transition:opacity .46s ease,transform .46s cubic-bezier(.2,.7,.3,1);
}

/* ---------- footer ---------- */
.site-footer{
  margin-top:clamp(48px,7vw,96px);
  background:var(--ink);
  color:var(--paper);
  border-top:2px solid var(--signal);
}
.footer__inner{max-width:var(--w-max);margin-inline:auto;padding-inline:var(--pad);}
.footer__grid{
  display:grid;
  grid-template-columns:1.25fr .85fr 1.15fr;
  gap:clamp(24px,4vw,56px);
  padding-block:clamp(36px,5vw,64px) clamp(28px,4vw,48px);
}
.footer__brand{min-width:0;}
.brand--footer{align-items:flex-start;text-align:left;}
.brand--footer .brand__name{font-size:clamp(20px,2.2vw,26px);letter-spacing:.12em;}
.brand--footer .brand__tagline{letter-spacing:.22em;}
.footer__intro{
  max-width:38ch;margin-top:16px;
  font-size:14.5px;line-height:1.8;color:var(--paper-72);
}
.footer__coords{
  margin-top:16px;
  font-family:var(--font-mono);font-size:10.5px;letter-spacing:.18em;text-transform:uppercase;
  color:rgba(185,183,176,.82);
}
.footer__col{min-width:0;}
.footer__title{
  margin-bottom:14px;padding-bottom:10px;
  border-bottom:1px solid var(--line-dark);
  font-family:var(--font-mono);font-weight:400;font-size:10.5px;letter-spacing:.2em;text-transform:uppercase;
  color:var(--signal);
}
.footer__links{display:grid;gap:1px;}
.footer__links a{
  display:inline-block;padding:6px 0;
  font-size:14px;color:rgba(244,241,232,.78);
  transition:color .16s ease,transform .16s ease;
}
.footer__links a:hover{color:var(--signal);transform:translateX(4px);}
.footer__links--plain{gap:12px;}
.footer__key{
  display:block;
  font-family:var(--font-mono);font-size:10px;letter-spacing:.18em;text-transform:uppercase;
  color:rgba(185,183,176,.72);
}
.footer__val{display:block;font-size:14px;line-height:1.65;color:var(--paper);word-break:break-word;}
.footer__note{margin-top:14px;max-width:34ch;font-size:12.5px;line-height:1.7;color:var(--paper-60);}
.footer__col--contact .btn{margin-top:16px;}
.footer__legal{
  display:flex;flex-wrap:wrap;gap:8px 24px;
  padding-block:16px;
  border-top:1px solid var(--line-dark);
  font-family:var(--font-mono);font-size:10.5px;letter-spacing:.14em;text-transform:uppercase;
}
.footer__legal a{color:rgba(244,241,232,.72);transition:color .16s ease;}
.footer__legal a:hover{color:var(--signal);}
.footer__base{
  display:flex;flex-wrap:wrap;justify-content:space-between;gap:10px 24px;
  padding-block:16px 26px;
  border-top:1px solid var(--line-dark-soft);
  font-family:var(--font-mono);font-size:10.5px;letter-spacing:.1em;
  color:rgba(185,183,176,.78);
}
.footer__icp,.footer__domain{font-variant-numeric:tabular-nums;}

/* ---------- responsive ---------- */
@media (max-width:1080px){
  .masthead__meta{display:none;}
  .split,.split--30{grid-template-columns:1fr;}
}

@media (max-width:900px){
  :root{--pad:clamp(14px,4vw,24px);}
  #main-content{scroll-margin-top:112px;}

  .masthead__inner{grid-template-columns:auto 1fr auto;gap:10px;padding-block:12px 10px;}
  .masthead__side--end .btn--ghost{display:none;}
  .masthead__side--end .btn{padding:9px 12px;font-size:10.5px;letter-spacing:.1em;}
  .nav-toggle{display:inline-flex;}
  .brand__name{font-size:clamp(17px,4.4vw,22px);letter-spacing:.1em;}

  .site-nav{display:none;}
  .site-nav[data-open="true"]{display:block;animation:navIn .2s ease-out both;}
  .site-nav__inner{flex-direction:column;align-items:stretch;padding-inline:var(--pad);}
  .nav-list{display:grid;width:100%;}
  .nav-item{border-left:0;border-right:0;border-bottom:1px solid var(--line-dark-soft);}
  .nav-item:first-child{border-left:0;border-top:1px solid var(--line-dark-soft);}
  .nav-link{padding:14px 2px;font-size:12px;letter-spacing:.14em;}
  .nav-link::after{left:2px;right:auto;width:22px;bottom:9px;}
  .site-nav__cta{
    display:inline-flex;align-items:center;justify-content:center;
    margin:16px 0 20px;padding:12px 18px;
    background:var(--signal);color:var(--ink);
    font-family:var(--font-mono);font-size:11.5px;letter-spacing:.14em;text-transform:uppercase;
  }
  @keyframes navIn{from{opacity:0;transform:translateY(-6px);}to{opacity:1;transform:none;}}

  .status-bar__inner{gap:4px 16px;font-size:10px;}
  .status-item:last-child{display:none;}

  .grid{grid-template-columns:repeat(6,minmax(0,1fr));}
  .col-4,.col-5,.col-6,.col-7,.col-8,.col-12{grid-column:span 6;}

  .footer__grid{grid-template-columns:1fr 1fr;}
  .footer__brand{grid-column:1/-1;}
  .footer__col--contact{grid-column:1/-1;}
}

@media (max-width:560px){
  body{font-size:16px;line-height:1.7;}
  .brand__tagline{display:none;}
  .masthead__side--end .btn{padding:8px 10px;font-size:10px;}
  .masthead__side--start{gap:6px;}
  .nav-toggle__label{display:none;}
  .nav-toggle{padding:8px;}
  .status-bar__inner .status-item:nth-child(2){display:none;}
  .footer__grid{grid-template-columns:1fr;}
  .footer__base{flex-direction:column;gap:6px;}
  .stat{font-size:clamp(42px,13vw,72px);}
}

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