/* ============================================================
   谈球吧赛场 — 共享站点样式 /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,h6,p,ul,ol,li,figure,blockquote,dl,dd{margin:0}
ul,ol{padding:0;list-style:none}
img,svg,video{max-width:100%;display:block}
button,input,select,textarea{font:inherit;color:inherit}
button{background:none;border:0;cursor:pointer}
a{color:inherit}
table{border-collapse:collapse;width:100%}

/* ---------- 2. Tokens ---------- */
:root{
  --c-void:#0A1F1A;
  --c-deep:#0E2A26;
  --c-mid:#123329;
  --c-panel:#14181A;
  --c-panel-2:#1A2022;
  --c-silver:#AEB9B5;
  --c-silver-dim:#7E8C88;
  --c-paper:#EEF4F0;
  --c-lime:#C6F24E;
  --c-lime-dim:#7FA22B;
  --c-orange:#FF6A2A;
  --c-alert:#FF3D2E;
  --c-line:rgba(174,185,181,.22);
  --c-line-strong:#1C3B32;
  --grad-band:linear-gradient(120deg,#0E2A26 0%,#0A1F1A 45%,#123329 100%);
  --font-display:'Oswald','Noto Sans SC','PingFang SC',system-ui,sans-serif;
  --font-body:'Noto Sans SC','Source Han Sans SC','PingFang SC',system-ui,sans-serif;
  --font-num:'JetBrains Mono','Roboto Mono',ui-monospace,SFMono-Regular,monospace;
  --shadow-hard:6px 6px 0 #030A08;
  --shadow-hard-lg:10px 10px 0 #030A08;
  --rail:88px;
  --topbar:64px;
  --wrap:1180px;
  --dur:.22s;
}
:root[data-rail="expanded"]{--rail:236px}

/* ---------- 3. Base ---------- */
body{
  min-height:100vh;
  background-color:var(--c-void);
  background-image:
    radial-gradient(1100px 560px at 82% -12%, rgba(198,242,78,.07), transparent 62%),
    linear-gradient(180deg,#0A1F1A 0%,#0A1F1A 46%,#0C241E 100%);
  color:var(--c-paper);
  font-family:var(--font-body);
  font-size:16px;
  line-height:1.75;
  font-weight:400;
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
  overflow-x:hidden;
}
::selection{background:var(--c-lime);color:#0A1F1A}
:focus-visible{outline:3px solid var(--c-lime);outline-offset:3px}
#main-content:focus-visible{outline-offset:-3px}

h1,h2,h3,h4,h5{
  font-family:var(--font-display);
  font-weight:700;
  line-height:1.14;
  letter-spacing:.02em;
  color:var(--c-paper);
}
h1{font-size:clamp(2rem,4.6vw,3.4rem);font-weight:900;letter-spacing:.01em}
h2{font-size:clamp(1.45rem,2.8vw,2.15rem);font-weight:800}
h3{font-size:clamp(1.05rem,1.6vw,1.2rem)}
p{max-width:none}

.num,.stat__num,.rail-nav__index,.rail-meta__item,.site-footer__legal,.tabnum{
  font-family:var(--font-num);
  font-variant-numeric:tabular-nums;
  font-feature-settings:'tnum' 1;
}
.annot{
  font-family:var(--font-body);
  font-size:12px;
  line-height:1.7;
  letter-spacing:.18em;
  color:var(--c-silver);
}
.lead{font-size:clamp(1rem,1.5vw,1.125rem);line-height:1.85;color:var(--c-silver);max-width:38ch}

.u-sr{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0}

/* ---------- 4. Layout ---------- */
.wrap{
  width:100%;
  max-width:var(--wrap);
  margin-inline:auto;
  padding-inline:clamp(16px,3.5vw,44px);
}
.wrap--narrow{max-width:780px}
.section{padding-block:clamp(40px,6vw,84px);position:relative}
.section--tight{padding-block:clamp(22px,3vw,40px)}
.grid{display:grid;gap:clamp(18px,2.4vw,32px)}
.grid--2{grid-template-columns:repeat(2,minmax(0,1fr))}
.grid--3{grid-template-columns:repeat(3,minmax(0,1fr))}
.grid--4{grid-template-columns:repeat(4,minmax(0,1fr))}
.rule{height:2px;background:var(--c-line-strong);border:0}
.band{background:var(--grad-band)}

/* ---------- 5. Skip link ---------- */
.skip-link{
  position:fixed;
  top:8px;left:8px;
  z-index:200;
  transform:translateY(-180%);
  background:var(--c-lime);
  color:#0A1F1A;
  font-family:var(--font-display);
  font-size:13px;
  font-weight:700;
  letter-spacing:.08em;
  padding:10px 18px;
  text-decoration:none;
  border:2px solid #08150F;
  box-shadow:var(--shadow-hard);
  transition:transform .18s ease;
}
.skip-link:focus{transform:translateY(0)}

/* ---------- 6. Reading progress ---------- */
.read-progress{
  position:fixed;
  top:0;left:0;right:0;
  height:3px;
  background:rgba(198,242,78,.12);
  z-index:120;
  pointer-events:none;
}
.read-progress__bar{
  display:block;
  height:100%;
  width:100%;
  background:linear-gradient(90deg,var(--c-lime) 0%,var(--c-lime) 62%,var(--c-orange) 100%);
  transform:scaleX(0);
  transform-origin:0 50%;
  transition:transform .12s linear;
}

/* ---------- 7. Header shell ---------- */
.site-header{
  position:fixed;
  z-index:80;
  background:var(--c-panel);
  color:var(--c-paper);
  border-right:2px solid var(--c-line-strong);
}
.site-header::after{
  content:'';
  position:absolute;
  top:0;right:-2px;
  width:2px;height:100%;
  background:linear-gradient(180deg,var(--c-lime) 0%,rgba(198,242,78,0) 58%);
  opacity:.55;
  pointer-events:none;
}

/* brand */
.brand{
  display:flex;
  align-items:center;
  gap:12px;
  text-decoration:none;
  color:inherit;
  min-width:0;
}
.brand__mark{
  width:44px;height:44px;
  flex:0 0 44px;
  display:grid;
  place-items:center;
  background:var(--c-lime);
  color:#0A1F1A;
  font-family:var(--font-display);
  font-weight:900;
  font-size:20px;
  line-height:1;
  border:2px solid #08150F;
  box-shadow:3px 3px 0 #030A08;
}
.brand__text{display:flex;flex-direction:column;min-width:0}
.brand__name{
  font-family:var(--font-display);
  font-size:15px;
  font-weight:700;
  letter-spacing:.05em;
  line-height:1.35;
  white-space:nowrap;
}
.brand__sub{
  font-size:11px;
  letter-spacing:.14em;
  color:var(--c-silver);
  line-height:1.5;
  white-space:nowrap;
}

/* toggle button */
.rail-btn{
  display:flex;
  align-items:center;
  justify-content:center;
  gap:10px;
  padding:10px 12px;
  border:2px solid var(--c-line-strong);
  color:var(--c-silver);
  font-family:var(--font-display);
  font-size:12px;
  font-weight:700;
  letter-spacing:.12em;
  transition:border-color var(--dur) ease,color var(--dur) ease,background-color var(--dur) ease;
}
.rail-btn:hover,.rail-btn:focus-visible{
  border-color:var(--c-lime);
  color:var(--c-lime);
  background-color:rgba(198,242,78,.07);
}
.rail-btn__bars{display:flex;flex-direction:column;gap:3px;width:16px;flex:0 0 16px}
.rail-btn__bars i{
  display:block;
  height:2px;
  background:currentColor;
  transition:transform var(--dur) ease,opacity var(--dur) ease;
}
.site-header[data-open] .rail-btn__bars i:nth-child(1){transform:translateY(5px) rotate(45deg)}
.site-header[data-open] .rail-btn__bars i:nth-child(2){opacity:0}
.site-header[data-open] .rail-btn__bars i:nth-child(3){transform:translateY(-5px) rotate(-45deg)}

/* nav */
.rail-nav{min-height:0;min-width:0}
.rail-nav__caption{
  font-size:11px;
  letter-spacing:.2em;
  color:var(--c-lime-dim);
  margin-bottom:10px;
  padding-left:12px;
}
.rail-nav__list{display:flex;flex-direction:column;gap:2px}
.rail-nav__item{min-width:0}
.rail-nav__link{
  position:relative;
  display:flex;
  align-items:center;
  gap:10px;
  padding:11px 12px;
  text-decoration:none;
  color:var(--c-silver);
  border-left:3px solid transparent;
  transition:color var(--dur) ease,background-color var(--dur) ease,border-color var(--dur) ease;
}
.rail-nav__link::after{
  content:'';
  position:absolute;
  left:12px;right:12px;bottom:5px;
  height:2px;
  background:var(--c-lime);
  transform:scaleX(0);
  transform-origin:0 50%;
  transition:transform var(--dur) ease;
}
.rail-nav__link:hover{color:var(--c-paper);background-color:rgba(198,242,78,.05)}
.rail-nav__link:hover::after{transform:scaleX(1)}
.rail-nav__link[aria-current="page"]{
  color:var(--c-lime);
  border-left-color:var(--c-lime);
  background-color:rgba(198,242,78,.09);
}
.rail-nav__index{
  font-size:12px;
  letter-spacing:.06em;
  color:var(--c-lime-dim);
  flex:0 0 auto;
  line-height:1;
}
.rail-nav__link[aria-current="page"] .rail-nav__index{color:var(--c-lime)}
.rail-nav__label{
  font-size:14px;
  font-weight:500;
  letter-spacing:.02em;
  white-space:nowrap;
  line-height:1.4;
}

/* rail foot */
.rail-foot{
  flex:0 0 auto;
  display:flex;
  flex-direction:column;
  gap:12px;
  padding-top:14px;
  border-top:2px solid var(--c-line-strong);
  min-width:0;
}
.rail-meta{display:flex;flex-direction:column;gap:6px}
.rail-meta__item{
  font-size:11px;
  letter-spacing:.1em;
  color:var(--c-silver-dim);
  line-height:1.6;
  white-space:nowrap;
}
.rail-meta__item::before{
  content:'';
  display:inline-block;
  width:6px;height:6px;
  margin-right:8px;
  background:var(--c-lime-dim);
  vertical-align:middle;
}
.rail-foot__cta{
  width:100%;
  justify-content:center;
  padding:11px 12px;
  font-size:12.5px;
  gap:6px;
}
.rail-foot__glyph{font-size:12px;line-height:1}

/* scrim */
.nav-scrim{
  position:fixed;
  inset:0;
  z-index:70;
  background-color:rgba(4,14,11,.74);
  border:0;
  opacity:0;
  pointer-events:none;
  transition:opacity var(--dur) ease;
}
.site-header[data-open] .nav-scrim{opacity:1;pointer-events:auto}

/* ---------- 8. Header — desktop rail ---------- */
@media (min-width:901px){
  html:not([data-rail="expanded"]) .rail-label-hide{display:none}
  body{
    padding-left:var(--rail);
    transition:padding-left var(--dur) ease;
  }
  .site-header{
    top:0;left:0;bottom:0;
    width:var(--rail);
    display:flex;
    flex-direction:column;
    gap:16px;
    padding:18px 12px 16px;
    overflow:hidden;
    transition:width var(--dur) ease;
  }
  .site-header__top{
    display:flex;
    flex-direction:column;
    align-items:stretch;
    gap:12px;
    flex:0 0 auto;
  }
  .rail-btn{width:100%}
  .rail-btn__text{
    position:absolute;
    width:1px;height:1px;
    overflow:hidden;
    clip:rect(0 0 0 0);
    white-space:nowrap;
  }
  .rail-nav{
    flex:1 1 auto;
    overflow-y:auto;
    overflow-x:hidden;
    scrollbar-width:thin;
    scrollbar-color:var(--c-line-strong) transparent;
  }
  .rail-nav::-webkit-scrollbar{width:6px}
  .rail-nav::-webkit-scrollbar-thumb{background:var(--c-line-strong)}
  .nav-scrim{display:none}
  .rail-foot__cta:hover{box-shadow:4px 4px 0 #030A08;transform:translate(-1px,-1px)}
}

/* ---------- 9. Header — mobile drawer ---------- */
@media (max-width:900px){
  body{
    padding-left:0;
    padding-top:var(--topbar);
  }
  .site-header{
    top:0;left:0;right:0;
    height:var(--topbar);
    display:flex;
    align-items:center;
    padding:0 16px;
    border-right:0;
    border-bottom:2px solid var(--c-line-strong);
    overflow:visible;
  }
  .site-header::after{display:none}
  .site-header__top{
    display:flex;
    align-items:center;
    justify-content:space-between;
    gap:12px;
    width:100%;
  }
  .brand__mark{width:38px;height:38px;flex:0 0 38px;font-size:17px}
  .brand__name{font-size:14px}
  .brand__sub{font-size:10px;letter-spacing:.1em}
  .rail-btn{padding:8px 10px}

  .rail-nav{
    position:fixed;
    top:0;left:0;bottom:0;
    width:min(308px,86vw);
    padding:calc(var(--topbar) + 18px) 20px 168px;
    background-color:var(--c-panel);
    border-right:2px solid var(--c-lime-dim);
    transform:translateX(-102%);
    transition:transform var(--dur) ease;
    overflow-y:auto;
    z-index:90;
  }
  .rail-foot{
    position:fixed;
    left:0;bottom:0;
    width:min(308px,86vw);
    padding:18px 20px 22px;
    background-color:var(--c-panel);
    border-right:2px solid var(--c-lime-dim);
    border-top:2px solid var(--c-line-strong);
    transform:translateX(-102%);
    transition:transform var(--dur) ease;
    z-index:91;
  }
  .site-header[data-open] .rail-nav,
  .site-header[data-open] .rail-foot{transform:none}

  .rail-nav__caption{font-size:11px;padding-left:12px}
  .rail-nav__link{padding:13px 12px}
  .rail-nav__label{font-size:15px}
  .rail-meta__item{white-space:normal}
}

/* ---------- 10. Footer ---------- */
.site-footer{
  position:relative;
  margin-top:clamp(48px,8vw,104px);
  background-color:var(--c-panel);
  border-top:2px solid var(--c-line-strong);
  color:var(--c-silver);
}
.site-footer::before{
  content:'';
  position:absolute;
  top:-2px;left:0;
  width:clamp(80px,18%,220px);
  height:4px;
  background-color:var(--c-lime);
}
.site-footer__grid{
  display:grid;
  grid-template-columns:minmax(230px,1.35fr) repeat(2,minmax(140px,1fr)) minmax(220px,1.25fr);
  gap:clamp(26px,3.6vw,48px);
  padding-block:clamp(36px,5.4vw,64px);
}
.site-footer__brand{min-width:0}
.site-footer__name{
  font-family:var(--font-display);
  font-size:22px;
  font-weight:900;
  letter-spacing:.05em;
  line-height:1.2;
  color:var(--c-paper);
}
.site-footer__sub{
  margin-top:3px;
  font-size:12px;
  letter-spacing:.16em;
  color:var(--c-lime-dim);
}
.site-footer__desc{
  margin-top:14px;
  font-size:13.5px;
  line-height:1.8;
  color:var(--c-silver-dim);
  max-width:36ch;
}
.site-footer__brand .btn{margin-top:18px}
.site-footer__col{min-width:0}
.site-footer__col-title{
  font-family:var(--font-display);
  font-size:12px;
  font-weight:700;
  letter-spacing:.18em;
  color:var(--c-lime);
  margin-bottom:14px;
  line-height:1.4;
}
.site-footer__links{display:flex;flex-direction:column;gap:9px}
.site-footer__links a{
  display:inline-block;
  font-size:14px;
  color:var(--c-silver);
  text-decoration:none;
  transition:color var(--dur) ease,transform var(--dur) ease;
}
.site-footer__links a:hover{color:var(--c-paper);transform:translateX(4px)}
.site-footer__lines{
  display:flex;
  flex-direction:column;
  gap:9px;
  font-size:13.5px;
  line-height:1.7;
  color:var(--c-silver-dim);
  word-break:break-word;
}
.site-footer__lines li{overflow-wrap:anywhere}
.site-footer__base{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:10px 28px;
  padding-block:18px 28px;
  border-top:2px solid var(--c-line-strong);
  font-size:12px;
  letter-spacing:.1em;
  color:var(--c-silver-dim);
}
.site-footer__legal{color:var(--c-paper);letter-spacing:.06em}
.site-footer__locality{color:var(--c-silver)}
.site-footer__copy{margin-left:auto;letter-spacing:.08em}
.site-footer__note{
  width:100%;
  margin-top:2px;
  font-size:12px;
  letter-spacing:.04em;
  line-height:1.7;
  color:var(--c-silver-dim);
}

/* ---------- 11. Buttons ---------- */
.btn{
  position:relative;
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:12px 20px;
  font-family:var(--font-display);
  font-size:14px;
  font-weight:700;
  letter-spacing:.07em;
  line-height:1.2;
  text-decoration:none;
  border:2px solid var(--c-lime);
  background-color:transparent;
  color:var(--c-lime);
  transition:background-color var(--dur) ease,color var(--dur) ease,transform var(--dur) ease,box-shadow var(--dur) ease,border-color var(--dur) ease;
}
.btn:hover,.btn:focus-visible{
  background-color:rgba(198,242,78,.12);
  transform:translate(-2px,-2px);
  box-shadow:var(--shadow-hard);
}
.btn--lime{
  background-color:var(--c-lime);
  border-color:var(--c-lime);
  color:#0A1F1A;
}
.btn--lime:hover,.btn--lime:focus-visible{
  background-color:#D8FF6C;
  color:#0A1F1A;
}
.btn--ghost{
  border-color:var(--c-silver);
  color:var(--c-silver);
}
.btn--ghost:hover,.btn--ghost:focus-visible{
  border-color:var(--c-lime);
  color:var(--c-lime);
  background-color:rgba(198,242,78,.08);
}
.btn--sm{padding:9px 14px;font-size:12.5px;letter-spacing:.06em}

/* ---------- 12. Breadcrumbs ---------- */
.crumbs{
  padding-block:18px 4px;
  font-size:12px;
  letter-spacing:.08em;
  color:var(--c-silver-dim);
}
.crumbs__list{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px;
}
.crumbs__list li{display:flex;align-items:center;gap:8px}
.crumbs__list li+li::before{
  content:'/';
  color:var(--c-lime-dim);
  font-family:var(--font-num);
}
.crumbs__list a{
  color:var(--c-silver);
  text-decoration:none;
  transition:color var(--dur) ease;
}
.crumbs__list a:hover{color:var(--c-lime)}
.crumbs__list [aria-current="page"]{color:var(--c-paper)}

/* ---------- 13. Panels & data ---------- */
.panel{
  position:relative;
  background-color:var(--c-panel);
  border:2px solid var(--c-line-strong);
  padding:clamp(18px,2.4vw,28px);
  min-width:0;
}
.panel--lift{box-shadow:var(--shadow-hard)}
.panel--paper{
  background-color:var(--c-paper);
  border-color:#08150F;
  color:#0A1F1A;
  box-shadow:var(--shadow-hard);
}
.panel--paper h1,.panel--paper h2,.panel--paper h3,.panel--paper h4{color:#0A1F1A}
.panel--paper .annot,.panel--paper .stat__label{color:#3C4F49}
.panel--paper .lead{color:#2A3A35}

.section-head{
  display:grid;
  grid-template-columns:auto minmax(0,1fr);
  align-items:baseline;
  gap:6px 20px;
  padding-bottom:16px;
  margin-bottom:clamp(20px,3vw,32px);
  border-bottom:2px solid var(--c-line-strong);
}
.section-head__no{
  grid-row:span 2;
  font-family:var(--font-num);
  font-size:clamp(1.7rem,3.4vw,2.7rem);
  font-weight:700;
  line-height:1;
  color:var(--c-lime-dim);
  letter-spacing:.02em;
}
.section-head__title{min-width:0}
.section-head__note{
  grid-column:2;
  font-size:12px;
  letter-spacing:.14em;
  color:var(--c-silver-dim);
  line-height:1.7;
}

.stat{display:flex;flex-direction:column;gap:4px;min-width:0}
.stat__num{
  font-size:clamp(1.5rem,3.1vw,2.15rem);
  font-weight:700;
  line-height:1.08;
  color:var(--c-lime);
  letter-spacing:.01em;
}
.stat__num--orange{color:var(--c-orange)}
.stat__num--paper{color:var(--c-paper)}
.stat__label{
  font-size:12px;
  letter-spacing:.14em;
  color:var(--c-silver-dim);
  line-height:1.6;
}

.tag{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:3px 9px;
  border:1px solid var(--c-line);
  color:var(--c-silver);
  font-family:var(--font-num);
  font-size:11px;
  letter-spacing:.1em;
  line-height:1.6;
  white-space:nowrap;
}
.tag--lime{border-color:var(--c-lime-dim);color:var(--c-lime)}
.tag--orange{border-color:var(--c-orange);color:var(--c-orange)}
.tag--alert{border-color:var(--c-alert);color:var(--c-alert)}

/* ---------- 14. Image frames ---------- */
.frame{
  position:relative;
  display:block;
  overflow:hidden;
  background-color:var(--c-mid);
  border:2px solid var(--c-line-strong);
  min-width:0;
}
.frame > img,
.frame > picture > img{
  width:100%;
  height:100%;
  object-fit:cover;
  display:block;
}
.frame::after{
  content:'';
  position:absolute;
  inset:0;
  background:linear-gradient(180deg,rgba(10,31,26,0) 52%,rgba(10,31,26,.78) 100%);
  pointer-events:none;
}
.frame--21-9{aspect-ratio:21/9}
.frame--16-9{aspect-ratio:16/9}
.frame--4-3{aspect-ratio:4/3}
.frame--1-1{aspect-ratio:1/1}
.frame--3-4{aspect-ratio:3/4}
.frame__caption{
  position:absolute;
  left:0;bottom:0;
  z-index:1;
  padding:12px 14px;
  font-size:11.5px;
  letter-spacing:.14em;
  color:var(--c-paper);
  line-height:1.6;
}

/* ---------- 15. Reveal ---------- */
[data-reveal]{
  opacity:0;
  transform:translateY(14px);
  transition:opacity .24s ease,transform .24s ease;
}
[data-reveal].is-in{opacity:1;transform:none}

/* ---------- 16. Responsive ---------- */
@media (max-width:1080px){
  .site-footer__grid{
    grid-template-columns:repeat(2,minmax(0,1fr));
  }
  .site-footer__brand{grid-column:1/-1}
}
@media (max-width:900px){
  .grid--4{grid-template-columns:repeat(2,minmax(0,1fr))}
  .grid--3{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media (max-width:640px){
  .grid--2,.grid--3,.grid--4{grid-template-columns:minmax(0,1fr)}
  .site-footer__grid{grid-template-columns:minmax(0,1fr);gap:30px}
  .site-footer__copy{margin-left:0}
  .section-head{grid-template-columns:minmax(0,1fr)}
  .section-head__no{grid-row:auto;font-size:1.7rem}
  .section-head__note{grid-column:1}
}

/* ---------- 17. 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;
  }
  [data-reveal]{opacity:1;transform:none}
  .read-progress__bar{transition:none}
}