/* ==========================================================================
   B体育看台 — 共享样式表 /assets/site.css
   深夜看台 · 记分牌粗野主义 · 框架式导航
   ========================================================================== */

/* --- 1. 设计令牌 ---------------------------------------------------------- */
:root{
  --ink:#060B14;
  --ink-2:#0D1730;
  --line:#1C2B45;
  --lime:#C6FF3E;
  --orange:#FF7A2F;
  --cyan:#4FD8E8;
  --red:#FF4D5E;
  --white:#E9EEF6;
  --mist:#94A3BC;
  --paper:#F4F7FB;

  --rail:250px;
  --header-h:62px;
  --quick-h:58px;
  --pad-x:clamp(16px,5vw,48px);
  --gap:24px;
  --content:1200px;

  --font-sans:"Noto Sans SC","PingFang SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  --font-num:"Barlow Condensed","DIN Alternate","Arial Narrow",ui-monospace,"SFMono-Regular",Menlo,monospace;

  --ease:200ms cubic-bezier(.2,.7,.3,1);
  --shadow-hard:6px 6px 0 rgba(28,43,69,.85);
}

/* --- 2. Reset ------------------------------------------------------------- */
*,*::before,*::after{box-sizing:border-box}

html{
  -webkit-text-size-adjust:100%;
  scroll-behavior:smooth;
  scroll-padding-top:calc(var(--header-h) + 16px);
}

body{
  margin:0;
  background-color:var(--ink);
  color:var(--white);
  font-family:var(--font-sans);
  font-size:16px;
  font-weight:400;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
}

img,svg,video{display:block;max-width:100%;height:auto}
ul,ol{margin:0;padding:0}
button{font:inherit;color:inherit}
a{color:var(--cyan);text-decoration:none}
a:hover{color:var(--lime)}
main{display:block}

h1,h2,h3,h4{
  margin:0 0 .6em;
  color:var(--white);
  font-weight:800;
  line-height:1.14;
  letter-spacing:-0.015em;
}
h1{font-size:clamp(2.4rem,7vw,5rem);line-height:.98;letter-spacing:-0.02em;font-weight:900}
h2{font-size:clamp(1.6rem,4vw,2.2rem)}
h3{font-size:clamp(1.15rem,2.4vw,1.45rem)}
h4{font-size:1.05rem}
p{margin:0 0 1em}

/* --- 3. 焦点与无障碍 ------------------------------------------------------ */
:focus-visible{outline:2px solid var(--cyan);outline-offset:2px}
@supports not selector(:focus-visible){
  a:focus,button:focus{outline:2px solid var(--cyan);outline-offset:2px}
}

.skip-link{
  position:absolute;
  top:-80px;
  left:8px;
  z-index:400;
  padding:10px 18px;
  background:var(--lime);
  color:#07110C;
  font-size:.9rem;
  font-weight:700;
  letter-spacing:.06em;
  border:3px solid var(--ink);
  transition:top var(--ease);
}
.skip-link:focus{top:8px;color:#07110C}

.scroll-progress{
  position:fixed;
  top:0;left:0;right:0;
  z-index:300;
  height:3px;
  background:var(--lime);
  transform:scaleX(0);
  transform-origin:0 50%;
  pointer-events:none;
}

/* --- 4. 页头：框架式导航 -------------------------------------------------- */
.site-header{
  position:fixed;
  top:0;left:0;right:0;
  z-index:120;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:12px;
  min-height:var(--header-h);
  padding:0 var(--pad-x);
  background:var(--ink-2);
  border-bottom:3px solid var(--line);
}

.header-brand{flex:0 1 auto;min-width:0}

.brand{display:inline-block;color:var(--white)}
.brand:hover{color:var(--white)}
.brand-mark{
  display:block;
  font-size:1.12rem;
  font-weight:900;
  line-height:1.05;
  letter-spacing:-0.02em;
  color:var(--white);
  white-space:nowrap;
}
.brand-mark::after{
  content:"";
  display:block;
  width:28px;
  height:3px;
  margin-top:6px;
  background:var(--lime);
}
.brand-line{display:none}

.nav-toggle{
  display:inline-flex;
  align-items:center;
  gap:9px;
  padding:8px 13px;
  background:transparent;
  color:var(--lime);
  border:3px solid var(--line);
  font-size:.82rem;
  font-weight:700;
  letter-spacing:.16em;
  cursor:pointer;
  transition:background-color var(--ease),border-color var(--ease),color var(--ease);
}
.nav-toggle:hover{border-color:var(--lime)}
.nav-toggle-bars{display:inline-flex;flex-direction:column;gap:3px;width:15px}
.nav-toggle-bars i{display:block;height:2px;background:currentColor}
.site-header[data-open] .nav-toggle{background:var(--lime);border-color:var(--lime);color:#07110C}

.site-nav{
  position:fixed;
  left:0;right:0;
  top:var(--header-h);
  max-height:calc(100vh - var(--header-h));
  max-height:calc(100dvh - var(--header-h));
  overflow-y:auto;
  padding:6px var(--pad-x) 18px;
  background:var(--ink-2);
  border-bottom:4px solid var(--lime);
  visibility:hidden;
  opacity:0;
  transform:translateY(-12px);
  transition:opacity var(--ease),transform var(--ease),visibility var(--ease);
}
.site-header[data-open] .site-nav{
  visibility:visible;
  opacity:1;
  transform:translateY(0);
}

.nav-list{list-style:none}
.nav-item{margin:0}

.nav-link{
  display:flex;
  align-items:baseline;
  gap:10px;
  padding:11px 6px 11px 12px;
  color:var(--white);
  font-size:.98rem;
  font-weight:600;
  letter-spacing:.03em;
  border-left:3px solid transparent;
  border-bottom:1px solid var(--line);
  transition:color var(--ease),background-color var(--ease),border-color var(--ease),transform var(--ease);
}
.nav-link:hover{
  color:var(--lime);
  border-left-color:var(--lime);
  background:rgba(198,255,62,.07);
  transform:translateX(3px);
}
.nav-link[aria-current="page"]{
  color:var(--lime);
  border-left-color:var(--lime);
  background:rgba(198,255,62,.09);
}
.nav-num{
  font-family:var(--font-num);
  font-variant-numeric:tabular-nums;
  font-size:.78rem;
  font-weight:700;
  letter-spacing:.08em;
  color:var(--mist);
}
.nav-link[aria-current="page"] .nav-num,
.nav-link:hover .nav-num{color:var(--lime)}
.nav-label{flex:1 1 auto}

.nav-meta{
  display:flex;
  flex-wrap:wrap;
  align-items:baseline;
  gap:6px 10px;
  margin-top:18px;
  padding-top:14px;
  border-top:1px solid var(--line);
}
.nav-meta-k{font-size:11px;font-weight:700;letter-spacing:.2em;color:var(--cyan)}
.nav-meta-v{font-size:12.5px;letter-spacing:.06em;color:var(--mist)}

.quick-bar{
  position:fixed;
  left:0;right:0;bottom:0;
  z-index:110;
  display:grid;
  grid-template-columns:repeat(4,1fr);
  background:var(--ink-2);
  border-top:3px solid var(--line);
  padding-bottom:env(safe-area-inset-bottom,0px);
}
.quick-link{
  display:flex;
  align-items:center;
  justify-content:center;
  min-height:var(--quick-h);
  color:var(--mist);
  font-size:12.5px;
  font-weight:600;
  letter-spacing:.14em;
  border-right:1px solid var(--line);
  transition:color var(--ease),box-shadow var(--ease),background-color var(--ease);
}
.quick-link:last-child{border-right:0}
.quick-link:hover{color:var(--lime)}
.quick-link[aria-current="page"]{
  color:var(--lime);
  background:rgba(198,255,62,.08);
  box-shadow:inset 0 3px 0 var(--lime);
}

/* --- 5. 内容容器与节奏断点 ------------------------------------------------ */
.wrap{
  width:100%;
  max-width:var(--content);
  margin-inline:auto;
  padding-inline:var(--pad-x);
}
.section{padding-block:clamp(30px,6vw,70px)}

.band{padding-block:clamp(28px,5.5vw,64px);background:var(--ink-2)}
.band--ink2{background:var(--ink-2)}
.band--paper{background:var(--paper);color:var(--ink)}
.band--lime{background:var(--lime);color:#07110C}
.band--paper h1,.band--paper h2,.band--paper h3,.band--paper h4{color:var(--ink)}
.band--lime h1,.band--lime h2,.band--lime h3,.band--lime h4{color:#07110C}
.band--paper .lead,.band--lime .lead{color:inherit}
.band--paper .section-title::before,
.band--lime .section-title::before{background:currentColor}
.band--paper a{color:#123B5C}
.band--paper a:hover{color:var(--ink)}
.band--lime a{color:#07110C;border-bottom:2px solid #07110C}

.grid{display:grid;gap:var(--gap);grid-template-columns:1fr}
@media (min-width:640px){
  .grid--5-7,.grid--4-8,.grid--7-5{grid-template-columns:1fr 1fr}
}
@media (min-width:900px){
  .grid--5-7{grid-template-columns:5fr 7fr}
  .grid--4-8{grid-template-columns:4fr 8fr}
  .grid--7-5{grid-template-columns:7fr 5fr}
  .grid--3-5-4{grid-template-columns:3fr 5fr 4fr}
}

.section-title{
  position:relative;
  margin:0 0 1.1rem;
  padding-left:18px;
  font-size:clamp(1.55rem,3.6vw,2.15rem);
  font-weight:700;
  line-height:1.16;
  letter-spacing:-0.01em;
}
.section-title::before{
  content:"";
  position:absolute;
  left:0;top:.2em;bottom:.2em;
  width:6px;
  background:var(--lime);
}

.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:8px;
  margin:0 0 .8rem;
  font-size:12px;
  font-weight:700;
  letter-spacing:.2em;
  color:var(--cyan);
  text-transform:uppercase;
}

.lead{
  max-width:34em;
  font-size:clamp(1.02rem,2vw,1.18rem);
  line-height:1.8;
  color:var(--white);
}
.prose{max-width:34em}
.prose p{margin:0 0 1em}
.prose p+p{padding-top:.9em;border-top:1px solid var(--line)}

.rule{height:1px;margin:0;border:0;background:var(--line)}
.rule--lime{height:3px;background:var(--lime)}

/* --- 6. 面包屑 ------------------------------------------------------------ */
.crumbs{margin:0 0 1.4rem;font-size:12px;letter-spacing:.16em;color:var(--mist)}
.crumbs__list{display:flex;flex-wrap:wrap;gap:8px;list-style:none}
.crumbs__list li+li::before{content:"/";margin-right:8px;color:var(--mist);opacity:.6}
.crumbs a{color:var(--mist);border-bottom:1px solid var(--line);transition:color var(--ease),border-color var(--ease)}
.crumbs a:hover{color:var(--cyan);border-bottom-color:var(--cyan)}

/* --- 7. 数据构件 ---------------------------------------------------------- */
.panel{
  position:relative;
  background:var(--ink-2);
  border:3px solid var(--line);
  padding:34px 18px 18px;
  box-shadow:var(--shadow-hard);
  transition:transform var(--ease),border-color var(--ease),box-shadow var(--ease),background-color var(--ease);
}
.panel:hover{
  transform:translateY(-4px);
  border-color:var(--lime);
  box-shadow:8px 8px 0 rgba(28,43,69,.95);
}
.panel__label{
  position:absolute;
  top:0;left:0;
  display:inline-block;
  padding:4px 10px;
  background:var(--line);
  color:var(--white);
  font-size:12px;
  font-weight:600;
  letter-spacing:.16em;
  line-height:1.6;
}
.panel__note{
  display:block;
  margin-top:12px;
  padding-top:10px;
  border-top:1px solid var(--line);
  font-size:12.5px;
  letter-spacing:.04em;
  color:var(--mist);
}

.label{
  display:inline-block;
  font-size:12px;
  font-weight:600;
  letter-spacing:.16em;
  color:var(--mist);
}
.annotation{
  display:inline-block;
  font-size:12px;
  letter-spacing:.16em;
  color:var(--mist);
}
.annotation--vert{
  writing-mode:vertical-rl;
  text-orientation:mixed;
  letter-spacing:.3em;
  white-space:nowrap;
}

.num{
  display:inline-block;
  font-family:var(--font-num);
  font-variant-numeric:tabular-nums lining-nums;
  font-weight:700;
  line-height:.88;
  letter-spacing:-0.01em;
}
.num-xl{font-size:clamp(2rem,6vw,4rem)}
.num--lime{color:var(--lime)}
.num--orange{color:var(--orange)}
.num--red{color:var(--red)}
.num--cyan{color:var(--cyan)}

.stat{
  display:flex;
  flex-direction:column;
  gap:6px;
  padding:14px 0;
  border-top:1px solid var(--line);
}
.stat__num{
  font-family:var(--font-num);
  font-variant-numeric:tabular-nums;
  font-size:clamp(1.6rem,4vw,2.6rem);
  font-weight:700;
  line-height:1;
  color:var(--lime);
}
.stat__cap{font-size:12px;letter-spacing:.16em;color:var(--mist)}

[data-index-link][aria-current="true"]{color:var(--lime)}

/* --- 8. 媒体容器（供页面阶段放图） --------------------------------------- */
.media{
  position:relative;
  display:block;
  overflow:hidden;
  background:var(--ink-2);
  border:3px solid var(--line);
}
.media>img,.media>video,.media>svg{width:100%;height:100%;object-fit:cover}
.media--wide{aspect-ratio:16/9}
.media--ultra{aspect-ratio:21/9}
.media--square{aspect-ratio:1/1}
.media--tall{aspect-ratio:3/4}
.media__note{
  position:absolute;
  right:0;bottom:0;
  padding:4px 10px;
  background:var(--ink);
  color:var(--mist);
  font-size:12px;
  letter-spacing:.14em;
}
@media (max-width:639px){
  .media--tall{aspect-ratio:4/5}
  .media--ultra{aspect-ratio:16/9}
}

/* --- 9. 按钮 -------------------------------------------------------------- */
.btn{
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:12px 20px;
  background:var(--lime);
  color:#07110C;
  border:3px solid var(--lime);
  box-shadow:4px 4px 0 var(--line);
  font-size:.95rem;
  font-weight:700;
  letter-spacing:.05em;
  transition:transform var(--ease),box-shadow var(--ease),background-color var(--ease),color var(--ease),border-color var(--ease);
}
.btn:hover{color:#07110C;transform:translate(-2px,-2px);box-shadow:6px 6px 0 var(--line)}
.btn:active{transform:translate(2px,2px);box-shadow:2px 2px 0 var(--line)}
.btn--ghost{background:transparent;color:var(--lime);border-color:var(--lime)}
.btn--ghost:hover{background:var(--lime);color:#07110C}
.band--paper .btn{box-shadow:4px 4px 0 rgba(28,43,69,.5)}

/* --- 10. 页脚 ------------------------------------------------------------- */
.site-footer{
  margin-top:clamp(36px,8vw,90px);
  background:var(--ink-2);
  border-top:4px solid var(--line);
  padding-top:clamp(30px,6vw,60px);
  color:var(--white);
}
.footer-inner{
  display:grid;
  grid-template-columns:1fr;
  gap:30px;
  max-width:var(--content);
  margin-inline:auto;
  padding-inline:var(--pad-x);
}
@media (min-width:700px){
  .footer-inner{grid-template-columns:1.3fr 1.7fr;gap:34px}
}
@media (min-width:1024px){
  .footer-inner{grid-template-columns:1.4fr 1.5fr 1.2fr}
}

.footer-line{
  margin:0;
  max-width:26em;
  font-size:1rem;
  line-height:1.75;
  color:var(--white);
}
.footer-tag{
  margin:12px 0 0;
  padding-top:12px;
  border-top:1px solid var(--line);
  font-size:12px;
  letter-spacing:.16em;
  color:var(--mist);
}

.footer-nav{display:grid;grid-template-columns:1fr;gap:26px}
@media (min-width:560px){
  .footer-nav{grid-template-columns:1fr 1fr}
}

.footer-group-title{
  margin:0 0 12px;
  font-size:12px;
  font-weight:700;
  letter-spacing:.18em;
  color:var(--lime);
}
.footer-list{list-style:none}
.footer-list li{margin:0}
.footer-list a{
  display:block;
  padding:7px 0;
  color:var(--mist);
  font-size:.92rem;
  border-bottom:1px solid var(--line);
  transition:color var(--ease),padding-left var(--ease),border-color var(--ease);
}
.footer-list a:hover{color:var(--lime);padding-left:6px;border-bottom-color:var(--lime)}
.footer-list--plain li{
  padding:7px 0;
  border-bottom:1px solid var(--line);
  font-size:.92rem;
  letter-spacing:.02em;
  color:var(--mist);
  word-break:break-all;
}
.footer-note{
  margin:14px 0 0;
  max-width:30em;
  font-size:12.5px;
  line-height:1.7;
  color:var(--mist);
}

.footer-base{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:8px 20px;
  max-width:var(--content);
  margin:34px auto 0;
  padding:18px var(--pad-x) 24px;
  border-top:1px solid var(--line);
  font-size:12px;
  letter-spacing:.14em;
  color:var(--mist);
}
.footer-legal{color:var(--cyan)}
.footer-copy{color:var(--mist)}

/* --- 11. 断点：桌面端框架式侧栏 ------------------------------------------ */
@media (max-width:1023px){
  body{padding-bottom:calc(var(--quick-h) + env(safe-area-inset-bottom,0px))}
  main{padding-top:var(--header-h)}
}

@media (min-width:1024px){
  body{padding-left:var(--rail);padding-bottom:0}
  main{padding-top:0}
  html{scroll-padding-top:24px}

  .site-header{
    top:0;left:0;bottom:0;right:auto;
    width:var(--rail);
    min-height:0;
    flex-direction:column;
    align-items:stretch;
    justify-content:flex-start;
    gap:22px;
    padding:26px 20px 22px;
    border-bottom:0;
    border-right:4px solid var(--line);
    overflow-y:auto;
  }
  .site-nav{
    position:static;
    display:flex;
    flex-direction:column;
    max-height:none;
    overflow:visible;
    padding:0;
    background:transparent;
    border-bottom:0;
    visibility:visible;
    opacity:1;
    transform:none;
    flex:1 1 auto;
  }
  .nav-toggle{display:none}
  .quick-bar{display:none}

  .brand-mark{font-size:1.5rem}
  .brand-mark::after{width:44px;height:4px;margin-top:9px}
  .brand-line{display:block;margin-top:10px;font-size:12.5px;letter-spacing:.16em;color:var(--mist)}

  .nav-link{font-size:1rem;padding:12px 6px 12px 14px}
  .nav-meta{margin-top:auto}
}

/* --- 12. 减少动效 --------------------------------------------------------- */
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
  }
  .panel:hover{transform:none}
  .btn:hover,.btn:active{transform:none}
  .nav-link:hover{transform:none}
  .footer-list a:hover{padding-left:0}
}