/* ============================================================
   金博体育 · 北境转播台 共享样式 /assets/site.css
   01 reset  02 变量  03 基础排版  04 通用工具
   05 头部  06 页脚  07 组件  08 响应式  09 动效偏好
   ============================================================ */

/* 01 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,dl,dd,figure,blockquote,fieldset{margin:0}
ul,ol{padding:0;list-style:none}
img,svg,video{max-width:100%}
button{font:inherit;color:inherit;background:none;border:0}
a{color:inherit}
table{border-collapse:collapse}
main{display:block}
#main-content{scroll-margin-top:56px}
#main-content:focus{outline:none}

/* 02 变量 */
:root{
  --ink:#071923;
  --ink-2:#0E2A3A;
  --ink-3:#0A1F2C;
  --paper:#F2F7FA;
  --ice:#D7E2EA;
  --flame:#FF5A36;
  --live:#2EF2C3;
  --black:#0A0C10;
  --mute:#8FA3B3;
  --amber:#FFD166;
  --white:#FFFFFF;

  --font-display:"Oswald","Noto Sans SC","Source Han Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  --font-body:"Noto Sans SC","Source Han Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  --font-mono:"JetBrains Mono","IBM Plex Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;

  --wrap:1320px;
  --gutter:clamp(18px,4vw,56px);
  --hair:rgba(215,226,234,.16);
  --hair-strong:rgba(215,226,234,.3);
  --lift:0 18px 40px -26px rgba(0,0,0,.95);
}

/* 03 基础排版 */
body{
  font-family:var(--font-body);
  font-size:16px;
  line-height:1.75;
  color:var(--paper);
  background-color:var(--ink);
  background-image:
    radial-gradient(80% 55% at 84% -6%,rgba(46,242,195,.10),transparent 62%),
    radial-gradient(70% 50% at 4% 0%,rgba(255,90,54,.09),transparent 60%),
    linear-gradient(180deg,#071923 0%,#071923 58%,#05121B 100%);
  background-repeat:no-repeat;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
h1,h2,h3,h4,h5,h6{font-family:var(--font-display);font-weight:900;line-height:1.05;letter-spacing:-.03em}
h1{font-size:clamp(40px,7vw,104px)}
h2{font-size:clamp(28px,4vw,48px)}
h3{font-size:clamp(20px,2.4vw,28px)}
strong{font-weight:700}
::selection{background:var(--flame);color:var(--black)}

/* 04 通用工具 */
.sr-only{
  position:absolute;width:1px;height:1px;padding:0;margin:-1px;
  overflow:hidden;clip:rect(0 0 0 0);clip-path:inset(50%);white-space:nowrap;border:0;
}
.mono{font-family:var(--font-mono);font-variant-numeric:tabular-nums;letter-spacing:.04em}
.eyebrow{
  font-family:var(--font-mono);font-size:11px;letter-spacing:.24em;
  color:var(--mute);text-transform:uppercase;display:block;margin-bottom:10px;
}
.meta{font-family:var(--font-mono);font-size:12px;letter-spacing:.06em;color:var(--mute)}
.section-heading{font-family:var(--font-display);font-weight:900;font-size:clamp(26px,3.6vw,46px);line-height:1.04;letter-spacing:-.03em}
.prose{max-width:42em;font-size:16.5px;line-height:1.8;color:var(--ice)}
.prose p+p{margin-top:1em}
.link-more{
  color:var(--flame);text-decoration:none;font-weight:700;
  border-bottom:1px solid rgba(255,90,54,.45);transition:border-color .18s,color .18s;
}
.link-more:hover{color:var(--amber);border-bottom-color:var(--amber)}

.container{width:100%;max-width:var(--wrap);margin:0 auto;padding:0 var(--gutter)}
.container--narrow{max-width:840px}
.section{padding:clamp(40px,6vw,88px) 0}

.grid{display:grid;gap:clamp(14px,2vw,24px)}
.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))}

/* 焦点可见 */
:where(a,button,summary,input,select,textarea,[tabindex]):focus-visible{
  outline:2px solid var(--live);
  outline-offset:3px;
  border-radius:2px;
}

/* 05 头部 */
.skip-link{
  position:fixed;left:14px;top:-80px;z-index:400;
  padding:10px 18px;background:var(--flame);color:var(--black);
  font-weight:700;font-size:13px;letter-spacing:.06em;text-decoration:none;
  border-radius:2px;transition:top .2s ease;
}
.skip-link:focus,.skip-link:focus-visible{top:14px}

.site-header{position:relative;z-index:40}

/* 控制台条 */
.console-bar{
  position:sticky;top:0;z-index:90;
  background:rgba(7,25,35,.94);
  border-bottom:1px solid var(--hair);
  -webkit-backdrop-filter:blur(10px);
  backdrop-filter:blur(10px);
}
.console-bar__inner{
  max-width:var(--wrap);margin:0 auto;
  padding:0 var(--gutter);min-height:42px;
  display:flex;align-items:center;justify-content:space-between;gap:18px;
  font-size:11px;letter-spacing:.08em;
}
.console-status{
  display:flex;align-items:center;gap:9px;
  color:var(--ice);font-family:var(--font-mono);
  white-space:nowrap;overflow:hidden;text-overflow:ellipsis;
}
.console-dot{
  flex:none;width:7px;height:7px;border-radius:50%;
  background:var(--live);
  box-shadow:0 0 0 3px rgba(46,242,195,.14),0 0 12px rgba(46,242,195,.65);
  animation:breathe 2.4s ease-in-out infinite;
}
.console-status__text{color:var(--paper);letter-spacing:.1em}
.console-status__sep{color:rgba(143,163,179,.6)}
.console-status__zone{color:var(--mute);letter-spacing:.14em}
.console-util{display:flex;align-items:center;gap:12px}
.console-stamp{font-family:var(--font-mono);font-size:11px;color:var(--mute);letter-spacing:.1em;white-space:nowrap}
.console-stamp time{color:var(--ice)}
.console-copy{
  display:inline-flex;align-items:center;gap:8px;
  padding:4px 10px;border:1px solid var(--hair-strong);border-radius:2px;
  background:transparent;color:var(--paper);cursor:pointer;
  font-size:11px;letter-spacing:.06em;
  transition:border-color .18s,color .18s,background-color .18s;
}
.console-copy:hover{border-color:var(--flame);color:var(--flame)}
.console-copy__tag{font-size:10px;letter-spacing:.18em;color:var(--live)}
.console-copy__text{font-family:var(--font-mono);font-size:11px}
.console-copy[data-state="done"]{border-color:var(--live);color:var(--live);background:rgba(46,242,195,.08)}
.console-copy[data-state="fail"]{border-color:var(--amber);color:var(--amber);background:rgba(255,209,102,.08)}
.console-progress{
  position:absolute;left:0;right:0;bottom:-1px;height:2px;
  background:rgba(215,226,234,.08);
}
.console-progress__fill{
  display:block;height:100%;width:0;
  background:linear-gradient(90deg,var(--flame),var(--amber) 55%,var(--live));
  transition:width .12s linear;
}

/* 报头 */
.masthead{
  border-bottom:1px solid var(--hair);
  background:linear-gradient(180deg,rgba(14,42,58,.72),rgba(7,25,35,.12));
}
.masthead__inner{
  max-width:var(--wrap);margin:0 auto;
  padding:20px var(--gutter);
  display:grid;
  grid-template-columns:minmax(0,1.05fr) minmax(0,.92fr) minmax(0,1.55fr);
  column-gap:clamp(20px,3vw,44px);
  align-items:center;
}
.brand__link{display:block;text-decoration:none;color:inherit}
.brand__index{
  display:block;font-family:var(--font-mono);font-size:10px;
  letter-spacing:.22em;color:var(--live);margin-bottom:6px;
}
.brand__mark{
  display:block;font-family:var(--font-display);font-weight:900;
  font-size:clamp(26px,3.4vw,42px);line-height:.98;
  letter-spacing:-.045em;color:var(--white);
}
.brand__sub{
  display:block;margin-top:7px;font-size:11px;letter-spacing:.14em;
  color:var(--mute);font-family:var(--font-mono);
}
.brand__link:hover .brand__mark{color:var(--ice)}

.league-anchor{position:relative;padding-left:16px;border-left:2px solid var(--flame)}
.league-anchor__label{
  display:block;font-family:var(--font-mono);font-size:10px;
  letter-spacing:.24em;color:var(--mute);text-transform:uppercase;
}
.league-anchor__link{
  display:inline-block;margin:6px 0 7px;
  font-family:var(--font-display);font-weight:900;
  font-size:clamp(18px,2vw,25px);letter-spacing:-.02em;
  color:var(--white);text-decoration:none;
  border-bottom:2px solid var(--flame);padding-bottom:2px;
  transition:color .18s,border-color .18s;
}
.league-anchor__link:hover{color:var(--flame);border-bottom-color:var(--white)}
.league-anchor__meta{font-family:var(--font-mono);font-size:10.5px;letter-spacing:.1em;color:var(--mute)}

.nav-toggle{
  display:none;align-items:center;gap:10px;
  padding:9px 13px;border:1px solid var(--hair-strong);border-radius:2px;
  color:var(--paper);font-size:12px;letter-spacing:.12em;cursor:pointer;
  transition:border-color .18s,color .18s;
}
.nav-toggle:hover{border-color:var(--flame);color:var(--flame)}
.nav-toggle__bars{display:grid;gap:4px}
.nav-toggle__bars span{
  display:block;width:18px;height:2px;background:currentColor;
  transition:transform .22s ease,opacity .22s ease;
}
.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)}
.nav-toggle__text{font-family:var(--font-mono)}

.nav-panel{justify-self:end;width:100%;max-width:560px}
.site-nav{
  display:grid;grid-template-columns:repeat(3,minmax(0,1fr));
  border-top:1px solid var(--hair);border-left:1px solid var(--hair);
}
.site-nav__item{border-right:1px solid var(--hair);border-bottom:1px solid var(--hair)}
.site-nav__link{
  display:flex;align-items:baseline;gap:8px;
  padding:9px 11px;text-decoration:none;
  color:var(--ice);font-size:13px;letter-spacing:.02em;
  transition:background-color .18s,color .18s;
}
.site-nav__index{font-family:var(--font-mono);font-size:10px;color:var(--mute);letter-spacing:.1em;flex:none}
.site-nav__text{font-weight:500}
.site-nav__link:hover{background:rgba(255,90,54,.12);color:var(--white)}
.site-nav__link:hover .site-nav__index{color:var(--flame)}
.site-nav__link:focus-visible{outline-offset:-2px}
.site-nav__link[aria-current="page"]{background:var(--flame);color:var(--black)}
.site-nav__link[aria-current="page"] .site-nav__index{color:rgba(10,12,16,.62)}
.site-nav__link[aria-current="page"] .site-nav__text{font-weight:700}

/* 06 页脚 */
.site-footer{
  position:relative;margin-top:clamp(48px,7vw,96px);
  background:linear-gradient(180deg,#061520 0%,#071923 42%,#0A0C10 100%);
  border-top:1px solid var(--hair);
}
.site-footer::before{
  content:"";position:absolute;left:0;right:0;top:0;height:2px;
  background:linear-gradient(90deg,var(--flame),var(--amber) 48%,var(--live));
}
.footer__inner{max-width:var(--wrap);margin:0 auto;padding:clamp(32px,5vw,64px) var(--gutter) 26px}
.footer__top{
  display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;
  gap:20px;padding-bottom:22px;border-bottom:1px solid var(--hair);
}
.footer__wordmark{
  font-family:var(--font-display);font-weight:900;
  font-size:clamp(30px,5vw,58px);line-height:.94;
  letter-spacing:-.05em;color:var(--white);
}
.footer__tagline{margin-top:9px;font-size:11.5px;letter-spacing:.16em;color:var(--mute);font-family:var(--font-mono)}
.footer__status{display:inline-flex;align-items:center;gap:9px}
.footer__status-text{font-family:var(--font-mono);font-size:11px;letter-spacing:.14em;color:var(--live)}
.footer__grid{
  display:grid;grid-template-columns:repeat(4,minmax(0,1fr));
  gap:clamp(18px,3vw,36px);padding:30px 0 26px;
}
.footer__col-title{
  font-family:var(--font-mono);font-size:11px;font-weight:500;
  letter-spacing:.22em;color:var(--mute);margin-bottom:13px;text-transform:uppercase;
}
.footer__links{display:grid;gap:9px}
.footer__link{
  font-size:14px;color:var(--ice);text-decoration:none;
  border-bottom:1px solid transparent;transition:color .18s,border-color .18s;
}
.footer__link:hover{color:var(--flame);border-bottom-color:var(--flame)}
.footer__col--contact{align-content:start}
.footer__contact{font-size:12.5px;line-height:1.7;color:var(--mute);margin-bottom:12px}
.footer__contact .mono{color:var(--ice);font-size:12.5px;display:inline-block;margin-top:3px;word-break:break-all}
.footer__legal{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;
  gap:10px 24px;padding-top:20px;border-top:1px solid var(--hair);
  font-size:12px;color:var(--mute);
}
.footer__legal-text,.footer__legal-meta{margin:0}
.footer__legal-meta{letter-spacing:.12em;color:rgba(143,163,179,.7)}

/* 07 组件 */
/* 按钮 */
.btn{
  display:inline-flex;align-items:center;gap:10px;
  padding:12px 22px;border:1px solid transparent;border-radius:2px;
  font-family:var(--font-display);font-weight:700;font-size:14px;letter-spacing:.06em;
  text-decoration:none;cursor:pointer;
  transition:transform .18s ease,background-color .18s,color .18s,border-color .18s;
}
.btn--primary{background:var(--flame);color:var(--black)}
.btn--primary:hover{background:#FF7355;transform:translateY(-2px)}
.btn--ghost{background:transparent;color:var(--paper);border-color:var(--hair-strong)}
.btn--ghost:hover{border-color:var(--flame);color:var(--flame);transform:translateY(-2px)}
.btn:disabled{opacity:.5;cursor:not-allowed;transform:none}

/* 纸面卡片 */
.paper{
  position:relative;background:var(--paper);color:var(--ink);
  border:1px solid var(--black);border-radius:2px;
  padding:24px 22px 26px;
  box-shadow:8px 8px 0 rgba(215,226,234,.13);
  transition:transform .18s ease,box-shadow .18s ease,border-color .18s;
}
.paper:hover{transform:translateY(-2px);border-color:var(--flame);box-shadow:8px 8px 0 rgba(255,90,54,.22)}
.paper--dark{background:var(--ink-2);color:var(--paper);border-color:var(--hair-strong);box-shadow:8px 8px 0 rgba(7,25,35,.6)}
.paper--dark:hover{border-color:var(--flame)}
.paper__label{
  position:absolute;top:-1px;left:22px;transform:translateY(-50%);
  background:var(--flame);color:var(--black);
  font-family:var(--font-mono);font-size:10px;letter-spacing:.16em;
  padding:3px 9px;border:1px solid var(--black);white-space:nowrap;
}
.paper__label--live{background:var(--live)}
.paper__label--amber{background:var(--amber)}
.paper p{max-width:38em}

/* 标签 */
.tag{
  display:inline-flex;align-items:center;gap:6px;
  padding:3px 9px;border:1px solid currentColor;border-radius:2px;
  font-family:var(--font-mono);font-size:10px;letter-spacing:.14em;text-transform:uppercase;
}
.tag--live{color:var(--live);background:rgba(46,242,195,.08)}
.tag--hot{color:var(--flame);background:rgba(255,90,54,.1)}
.tag--amber{color:var(--amber);background:rgba(255,209,102,.1)}

/* 图片容器 */
.media-frame{
  position:relative;display:block;overflow:hidden;isolation:isolate;
  background:linear-gradient(145deg,var(--ink-2),var(--ink));
  border:1px solid var(--hair);
}
.media-frame img,.media-frame video{
  display:block;width:100%;height:100%;object-fit:cover;
  filter:saturate(.92) contrast(1.06);
}
.media-frame::after{
  content:"";position:absolute;inset:0;z-index:1;pointer-events:none;
  background:linear-gradient(118deg,rgba(46,242,195,.12),transparent 46%,rgba(255,90,54,.16));
}
.media-frame__caption{
  position:absolute;left:0;bottom:0;z-index:2;
  padding:6px 11px;background:rgba(7,25,35,.88);
  border-top:1px solid var(--hair);
  font-family:var(--font-mono);font-size:10.5px;letter-spacing:.1em;color:var(--ice);
}
.media-frame--hero{aspect-ratio:16/9}
.media-frame--wide{aspect-ratio:16/7}
.media-frame--card{aspect-ratio:4/3}
.media-frame--tall{aspect-ratio:3/4}
.media-frame--square{aspect-ratio:1/1}
.media-frame--placeholder{
  background-image:
    repeating-linear-gradient(135deg,rgba(215,226,234,.07) 0 2px,transparent 2px 12px),
    linear-gradient(150deg,var(--ink-2),var(--ink) 72%);
}
.media-frame--placeholder::before{
  content:"IMAGE SLOT";
  position:absolute;left:50%;top:50%;transform:translate(-50%,-50%);
  font-family:var(--font-mono);font-size:11px;letter-spacing:.32em;
  color:rgba(215,226,234,.38);z-index:2;
}

/* 折叠目录组 */
.fold{border-top:1px solid var(--hair)}
.fold:last-child{border-bottom:1px solid var(--hair)}
.fold__head{
  display:flex;align-items:center;justify-content:space-between;gap:18px;
  padding:16px 4px;cursor:pointer;list-style:none;
  font-family:var(--font-display);font-weight:700;font-size:16px;letter-spacing:.01em;
  color:var(--paper);transition:color .18s;
}
.fold__head::-webkit-details-marker{display:none}
.fold__head::after{content:"+";font-family:var(--font-mono);font-size:18px;color:var(--flame);line-height:1}
.fold[open] .fold__head::after{content:"\2212"}
.fold__head:hover{color:var(--flame)}
.fold__body{padding:0 4px 20px;color:var(--ice);font-size:15px;line-height:1.8;max-width:44em}

/* 面包屑 */
.breadcrumbs{margin:0 0 22px}
.breadcrumbs__list{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px;
  font-family:var(--font-mono);font-size:11px;letter-spacing:.08em;color:var(--mute);
}
.breadcrumbs__item{display:inline-flex;align-items:center;gap:8px}
.breadcrumbs__item::after{content:"/";color:rgba(143,163,179,.5)}
.breadcrumbs__item:last-child::after{content:""}
.breadcrumbs__link{color:var(--ice);text-decoration:none;border-bottom:1px solid transparent;transition:color .18s,border-color .18s}
.breadcrumbs__link:hover{color:var(--flame);border-bottom-color:var(--flame)}
.breadcrumbs__item--current{color:var(--paper)}

/* 08 响应式 */
@media (max-width:1080px){
  .masthead__inner{
    grid-template-columns:minmax(0,1fr) auto;
    row-gap:16px;
    padding-top:16px;padding-bottom:16px;
    align-items:center;
  }
  .brand{grid-column:1;grid-row:1}
  .nav-toggle{display:inline-flex;grid-column:2;grid-row:1;justify-self:end}
  .league-anchor{grid-column:1/-1;grid-row:2;padding-left:14px}
  .nav-panel{grid-column:1/-1;grid-row:3;justify-self:stretch;max-width:none;display:none}
  .nav-panel[data-open]{display:block}
  .site-nav{grid-template-columns:repeat(2,minmax(0,1fr))}
  .footer__grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .grid--4{grid-template-columns:repeat(2,minmax(0,1fr))}
  .grid--3{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media (max-width:860px){
  .console-status__zone{display:none}
  .console-status__sep{display:none}
}
@media (max-width:720px){
  .console-copy__text{display:none}
  .console-stamp{font-size:10.5px}
  .grid--2,.grid--3,.grid--4{grid-template-columns:minmax(0,1fr)}
  .paper{box-shadow:6px 6px 0 rgba(215,226,234,.13)}
}
@media (max-width:560px){
  .site-nav{grid-template-columns:minmax(0,1fr)}
  .footer__grid{grid-template-columns:minmax(0,1fr);gap:26px}
  .footer__top{align-items:flex-start}
  .footer__legal{flex-direction:column;align-items:flex-start}
  .console-bar__inner{min-height:46px;font-size:10.5px}
  .brand__sub{letter-spacing:.1em}
}

/* 09 动效偏好 */
@keyframes breathe{
  0%,100%{opacity:1;box-shadow:0 0 0 3px rgba(46,242,195,.14),0 0 12px rgba(46,242,195,.65)}
  50%{opacity:.5;box-shadow:0 0 0 3px rgba(46,242,195,.05),0 0 4px rgba(46,242,195,.3)}
}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{
    animation-duration:.001ms!important;
    animation-iteration-count:1!important;
    transition-duration:.001ms!important;
  }
  .console-dot{animation:none}
}