/* ============================================================
   安博看台 · 共享样式表 /assets/site.css
   视觉基调：寒地夜赛 —— 深夜看台蓝底、赛事脉冲橙红、荧光冰青焦点
   ============================================================ */

/* ---------- 1. 变量 ---------- */
:root{
  --abyss:#061021;
  --night:#0B1F3A;
  --tier:#122E52;
  --channel:#1E5AA8;
  --pulse:#FF4D2E;
  --pulse-hi:#FF8A5C;
  --ice:#6FFFE9;
  --ink:#F2F6FF;
  --muted:#9FB2CC;
  --edge:#2A4A78;

  --shell-max:1240px;
  --gutter:20px;
  --radius:2px;
  --shadow-hard:6px 6px 0 rgba(6,16,33,.85);
  --shadow-hard-sm:4px 4px 0 rgba(6,16,33,.8);

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

  --ease:cubic-bezier(.22,.61,.36,1);
}

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

html{
  -webkit-text-size-adjust:100%;
  scroll-behavior:smooth;
}

body{
  margin:0;
  min-height:100%;
  background-color:var(--night);
  color:var(--ink);
  font-family:var(--font-body);
  font-size:17px;
  line-height:1.75;
  font-weight:400;
  letter-spacing:0;
  overflow-x:hidden;
}

/* 夜间看台空气颗粒 */
body::before{
  content:"";
  position:fixed;
  inset:0;
  z-index:0;
  pointer-events:none;
  background-image:radial-gradient(rgba(242,246,255,.055) 1px, transparent 1px);
  background-size:3px 3px;
}

/* 看台灯光与冰面反光 */
body::after{
  content:"";
  position:fixed;
  inset:0;
  z-index:0;
  pointer-events:none;
  background:
    radial-gradient(58% 42% at 84% -6%, rgba(30,90,168,.5), transparent 70%),
    radial-gradient(42% 32% at 4% 6%, rgba(111,255,233,.09), transparent 72%),
    radial-gradient(70% 46% at 50% 110%, rgba(6,16,33,.92), transparent 72%);
}

img,svg,video{ max-width:100%; height:auto; display:block; }
h1,h2,h3,h4,p,ul,ol,dl,figure,blockquote{ margin:0; padding:0; }
ul,ol{ list-style:none; }
button{ font:inherit; color:inherit; background:none; border:0; }
a{ color:var(--ice); text-decoration:none; }
a:hover{ color:var(--pulse-hi); }

[id]{ scroll-margin-top:104px; }

:focus-visible{
  outline:2px solid var(--ice);
  outline-offset:2px;
  border-radius:var(--radius);
}

/* ---------- 3. 布局底座 ---------- */
.shell{
  width:100%;
  max-width:var(--shell-max);
  margin-inline:auto;
  padding-inline:var(--gutter);
}

main{ display:block; position:relative; z-index:1; }

.divider{
  height:2px;
  border:0;
  background:var(--edge);
  margin:36px 0;
  opacity:.85;
}

/* ---------- 4. 头部 ---------- */
.site-header{
  position:sticky;
  top:0;
  z-index:60;
  background:var(--night);
}

.skip-link{
  position:absolute;
  left:-9999px;
  top:0;
  z-index:200;
  display:inline-block;
  padding:10px 18px;
  background:var(--ice);
  color:var(--abyss);
  font-weight:800;
  font-size:15px;
  border-radius:var(--radius);
}
.skip-link:focus{ left:12px; top:8px; }

/* 上层品牌说明条：滚动后收起 */
.header-top{
  height:40px;
  overflow:hidden;
  background:var(--abyss);
  border-bottom:2px solid var(--edge);
  transition:height .28s var(--ease), opacity .22s var(--ease);
}
.header-top__inner{
  height:40px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
}
.header-top__claim,
.header-top__meta{
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.08em;
  color:var(--muted);
  white-space:nowrap;
  overflow:hidden;
  text-overflow:ellipsis;
}
.header-top__claim{ color:var(--ink); opacity:.82; }
.header-top__meta{ display:inline-flex; align-items:center; gap:8px; }

.site-header.is-condensed .header-top{
  height:0;
  opacity:0;
}

/* 下层栏目条 */
.header-bar{
  position:relative;
  background:var(--night);
  border-bottom:2px solid var(--edge);
  transition:box-shadow .28s var(--ease);
}
.site-header.is-condensed .header-bar{
  box-shadow:0 12px 26px rgba(6,16,33,.62);
}
.header-bar__inner{
  display:flex;
  align-items:center;
  gap:18px;
  min-height:64px;
}

.brand{
  display:inline-flex;
  align-items:center;
  gap:10px;
  flex:0 0 auto;
  color:var(--ink);
}
.brand:hover{ color:var(--ink); }
.brand__mark{
  width:36px;
  height:36px;
  display:grid;
  place-items:center;
  background:var(--pulse);
  color:#fff;
  font-family:var(--font-display);
  font-weight:900;
  font-size:19px;
  line-height:1;
  border-radius:var(--radius);
  box-shadow:var(--shadow-hard-sm);
}
.brand__lock{ display:flex; flex-direction:column; line-height:1; }
.brand__name{
  font-family:var(--font-display);
  font-weight:900;
  font-size:19px;
  letter-spacing:-.01em;
}
.brand__sub{
  margin-top:4px;
  font-family:var(--font-mono);
  font-size:10px;
  letter-spacing:.18em;
  color:var(--muted);
}

.site-nav{
  flex:1 1 auto;
  display:flex;
  justify-content:center;
  align-items:center;
}
.site-nav__list{
  display:flex;
  align-items:center;
  gap:2px;
}
.site-nav__item{ display:block; }
.site-nav__link{
  position:relative;
  display:inline-block;
  padding:10px 12px;
  font-size:15px;
  font-weight:600;
  color:var(--muted);
  letter-spacing:.01em;
  border-radius:var(--radius);
  transition:color .18s var(--ease);
}
.site-nav__link:hover{ color:var(--ice); }
.site-nav__link[aria-current="page"]{ color:var(--ink); }
.site-nav__link[aria-current="page"]::after{
  content:"";
  position:absolute;
  left:50%;
  bottom:2px;
  width:6px;
  height:6px;
  margin-left:-3px;
  border-radius:50%;
  background:var(--pulse);
  animation:dotPulse 1.8s infinite;
}

.header-bar__cta{ flex:0 0 auto; }

/* 移动导航按钮 */
.nav-toggle{
  display:none;
  align-items:center;
  gap:8px;
  margin-left:auto;
  padding:9px 12px;
  border:2px solid var(--edge);
  border-radius:var(--radius);
  color:var(--ink);
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.12em;
  cursor:pointer;
  transition:border-color .18s var(--ease), color .18s var(--ease);
}
.nav-toggle:hover{ border-color:var(--ice); color:var(--ice); }
.nav-toggle__bars{ display:grid; gap:4px; width:18px; }
.nav-toggle__bars i{
  display:block;
  height:2px;
  width:100%;
  background:currentColor;
  border-radius:1px;
}

/* 滚动进度光带 */
.scroll-progress{
  position:absolute;
  left:0;
  right:0;
  bottom:-2px;
  height:3px;
  pointer-events:none;
  background:transparent;
}
.scroll-progress::after{
  content:"";
  display:block;
  height:100%;
  width:100%;
  transform:scaleX(var(--p,0));
  transform-origin:left center;
  background:linear-gradient(90deg,var(--pulse),var(--pulse-hi) 42%,var(--ice));
  transition:transform .12s linear;
}

/* ---------- 5. 页脚 ---------- */
.site-footer{
  position:relative;
  z-index:1;
  margin-top:64px;
  background:var(--abyss);
  border-top:2px solid var(--edge);
  color:var(--muted);
}

.footer-grid{
  display:grid;
  grid-template-columns:repeat(2,minmax(0,1fr));
  gap:30px 24px;
  padding:52px 0 36px;
}

.footer-brand__name{
  font-family:var(--font-display);
  font-weight:900;
  font-size:24px;
  line-height:1.1;
  color:var(--ink);
  letter-spacing:-.01em;
}
.footer-brand__line{
  margin-top:10px;
  font-size:15px;
  color:var(--muted);
  max-width:24em;
}
.footer-brand__badge{
  margin-top:16px;
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:5px 12px;
  border:2px solid var(--edge);
  border-radius:var(--radius);
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.1em;
  color:var(--ink);
}

.footer-col__title{
  margin-bottom:14px;
  font-family:var(--font-mono);
  font-weight:600;
  font-size:12px;
  letter-spacing:.2em;
  color:var(--muted);
}
.footer-col__list li + li{ margin-top:10px; }
.footer-col__list a{
  color:var(--ink);
  font-size:15px;
  opacity:.84;
  transition:color .18s var(--ease), opacity .18s var(--ease);
}
.footer-col__list a:hover{ color:var(--ice); opacity:1; }

.footer-contact{ grid-column:1 / -1; }
.footer-contact__list li{
  display:grid;
  grid-template-columns:auto 1fr;
  gap:12px;
  align-items:baseline;
  padding:8px 0;
  border-bottom:1px solid rgba(42,74,120,.55);
  font-size:14px;
}
.footer-contact__k{
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.12em;
  color:var(--muted);
}
.footer-contact__v{ color:var(--ink); word-break:break-word; }
.footer-contact__note{
  margin-top:14px;
  font-size:13px;
  line-height:1.7;
  color:var(--muted);
}

.footer-base{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:10px 24px;
  padding:18px 0 32px;
  border-top:2px solid var(--edge);
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.08em;
  color:var(--muted);
}

/* ---------- 6. 通用按钮 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  padding:12px 22px;
  border:2px solid transparent;
  border-radius:var(--radius);
  font-family:var(--font-display);
  font-weight:800;
  font-size:15px;
  letter-spacing:.04em;
  line-height:1;
  cursor:pointer;
  transition:transform .18s var(--ease), background-color .18s var(--ease),
             border-color .18s var(--ease), color .18s var(--ease), box-shadow .18s var(--ease);
}
.btn--pulse{
  background:var(--pulse);
  border-color:var(--pulse);
  color:#fff;
  box-shadow:var(--shadow-hard-sm);
}
.btn--pulse:hover{
  background:var(--pulse-hi);
  border-color:var(--pulse-hi);
  color:#fff;
  transform:translate(-2px,-2px);
  box-shadow:var(--shadow-hard);
}
.btn--ghost{
  background:transparent;
  border-color:var(--edge);
  color:var(--ink);
}
.btn--ghost:hover{
  border-color:var(--ice);
  color:var(--ice);
  transform:translate(-2px,-2px);
  box-shadow:var(--shadow-hard-sm);
}

/* ---------- 7. 面包屑与正文 ---------- */
.crumbs{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px;
  padding:18px 0 0;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.06em;
  color:var(--muted);
}
.crumbs a{ color:var(--muted); }
.crumbs a:hover{ color:var(--ice); }
.crumbs__sep{ color:var(--edge); }

.prose{ max-width:38em; }
.prose p{ margin-bottom:1.15em; }
.prose p:last-child{ margin-bottom:0; }
.prose h2{
  margin:1.6em 0 .6em;
  font-family:var(--font-display);
  font-weight:900;
  font-size:clamp(22px,2.6vw,32px);
  line-height:1.2;
  letter-spacing:-.01em;
}
.prose h3{
  margin:1.4em 0 .5em;
  font-size:19px;
  color:var(--ice);
}
.prose ul{ margin:0 0 1.15em; padding-left:1.15em; }
.prose li{ position:relative; margin-bottom:.5em; }
.prose li::before{
  content:"";
  position:absolute;
  left:-1em;
  top:.72em;
  width:6px;
  height:2px;
  background:var(--pulse);
}

/* ---------- 8. 区块标题与注释标签 ---------- */
.section-head{
  display:flex;
  flex-wrap:wrap;
  align-items:flex-end;
  justify-content:space-between;
  gap:14px 24px;
  margin-bottom:22px;
}
.section-head__title{
  font-family:var(--font-display);
  font-weight:900;
  font-size:clamp(24px,3.4vw,42px);
  line-height:1.08;
  letter-spacing:-.015em;
}

.rail-label{
  display:inline-block;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.3em;
  color:var(--muted);
}
.rail-label--vertical{
  writing-mode:vertical-rl;
  text-orientation:mixed;
  letter-spacing:.42em;
  padding:4px 0;
}

/* ---------- 9. Bento 模块 ---------- */
.bento{
  display:grid;
  grid-template-columns:repeat(12,minmax(0,1fr));
  gap:20px;
}

.tile{
  position:relative;
  grid-column:span var(--span,4);
  margin-top:var(--drop,0px);
  padding:22px;
  background:var(--tier);
  border:2px solid var(--edge);
  border-radius:var(--radius);
  box-shadow:var(--shadow-hard);
  transition:border-color .2s var(--ease), transform .2s var(--ease);
}
.tile:hover{ border-color:var(--channel); }
.tile--s{ --span:3; min-height:200px; }
.tile--m{ --span:5; min-height:300px; }
.tile--l{ --span:7; min-height:420px; }
.tile--focus{
  background:linear-gradient(150deg,var(--tier),var(--abyss));
  border-color:var(--channel);
}
.tile--edge{ border-color:var(--pulse); }

.tile__title{
  font-family:var(--font-display);
  font-weight:900;
  font-size:clamp(19px,2vw,26px);
  line-height:1.2;
  letter-spacing:-.01em;
  margin-bottom:10px;
}
.tile__text{
  font-size:15px;
  line-height:1.72;
  color:var(--muted);
  max-width:34em;
}
.tile__foot{
  margin-top:18px;
  padding-top:14px;
  border-top:1px solid rgba(42,74,120,.6);
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:10px 14px;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.06em;
  color:var(--muted);
}

/* ---------- 10. 标签 / 统计 / 脉冲 ---------- */
.tag{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:4px 10px;
  border:2px solid var(--edge);
  border-radius:var(--radius);
  background:rgba(30,90,168,.14);
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.06em;
  color:var(--muted);
}
.tag--pulse{
  border-color:var(--pulse);
  background:rgba(255,77,46,.14);
  color:var(--pulse-hi);
}
.tag--ice{
  border-color:var(--ice);
  background:rgba(111,255,233,.1);
  color:var(--ice);
}

.stat{ display:flex; flex-direction:column; gap:4px; }
.stat__value{
  font-family:var(--font-mono);
  font-weight:700;
  font-size:clamp(22px,3vw,34px);
  line-height:1;
  letter-spacing:.02em;
  color:var(--ice);
}
.stat__label{
  font-size:13px;
  color:var(--muted);
}

.dot-pulse{
  display:inline-block;
  width:8px;
  height:8px;
  flex:0 0 auto;
  border-radius:50%;
  background:var(--pulse);
  animation:dotPulse 1.8s infinite;
}

.pulse-ring{
  position:relative;
  display:inline-block;
  font-family:var(--font-mono);
  font-weight:700;
  color:var(--pulse);
  letter-spacing:.02em;
}
.pulse-ring::before{
  content:"";
  position:absolute;
  inset:-14px -20px;
  border:2px solid rgba(255,77,46,.55);
  border-radius:var(--radius);
  animation:ringPulse 1.8s infinite;
  pointer-events:none;
}

@keyframes dotPulse{
  0%{ box-shadow:0 0 0 0 rgba(255,77,46,.62); }
  70%{ box-shadow:0 0 0 10px rgba(255,77,46,0); }
  100%{ box-shadow:0 0 0 0 rgba(255,77,46,0); }
}
@keyframes ringPulse{
  0%{ opacity:.85; transform:scale(1); }
  70%{ opacity:0; transform:scale(1.06); }
  100%{ opacity:0; transform:scale(1.06); }
}

/* ---------- 11. 媒体容器 ---------- */
.media-frame{
  position:relative;
  display:block;
  overflow:hidden;
  background:linear-gradient(140deg,var(--tier),var(--abyss));
  border:2px solid var(--edge);
  border-radius:var(--radius);
}
.media-frame > img{
  width:100%;
  height:100%;
  object-fit:cover;
}
.media-frame--wide{ aspect-ratio:16 / 9; }
.media-frame--tall{ aspect-ratio:4 / 5; }
.media-frame--square{ aspect-ratio:1 / 1; }
.media-frame--band{ aspect-ratio:21 / 9; }

.media-frame__glow{
  position:absolute;
  inset:0;
  pointer-events:none;
  background:
    radial-gradient(70% 60% at 18% 0%, rgba(111,255,233,.16), transparent 62%),
    radial-gradient(70% 70% at 92% 100%, rgba(255,77,46,.2), transparent 64%),
    linear-gradient(180deg, rgba(6,16,33,.1), rgba(6,16,33,.55));
}
.media-frame__cap{
  position:absolute;
  left:0;
  bottom:0;
  padding:6px 12px;
  background:rgba(6,16,33,.82);
  border-top:2px solid var(--edge);
  border-right:2px solid var(--edge);
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.08em;
  color:var(--muted);
}

/* ---------- 12. 横向主题带 ---------- */
.band{
  display:flex;
  gap:14px;
  overflow-x:auto;
  padding:4px 0 14px;
  scroll-snap-type:x proximity;
  -webkit-overflow-scrolling:touch;
}
.band::-webkit-scrollbar{ height:6px; }
.band::-webkit-scrollbar-track{ background:var(--abyss); }
.band::-webkit-scrollbar-thumb{ background:var(--edge); }
.band__item{
  flex:0 0 auto;
  scroll-snap-align:start;
  padding:12px 18px;
  background:var(--tier);
  border:2px solid var(--edge);
  border-radius:var(--radius);
  font-family:var(--font-mono);
  font-size:13px;
  letter-spacing:.06em;
  color:var(--muted);
  white-space:nowrap;
  transition:border-color .18s var(--ease), color .18s var(--ease);
}
.band__item:hover{ border-color:var(--ice); color:var(--ink); }
.band__item[aria-current="true"]{
  border-color:var(--pulse);
  color:var(--ink);
  box-shadow:var(--shadow-hard-sm);
}

/* ---------- 13. 展开式内容组 ---------- */
.accordion{
  border-top:2px solid var(--edge);
}
.accordion__item{
  position:relative;
  border-bottom:2px solid var(--edge);
}
.accordion__item[data-open]::before{
  content:"";
  position:absolute;
  left:0;
  top:0;
  bottom:0;
  width:4px;
  background:var(--ice);
}
.accordion__trigger{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:18px;
  width:100%;
  padding:18px 18px 18px 22px;
  text-align:left;
  cursor:pointer;
  font-family:var(--font-display);
  font-weight:800;
  font-size:17px;
  line-height:1.4;
  color:var(--ink);
  transition:color .2s var(--ease), background-color .2s var(--ease);
}
.accordion__trigger:hover{ background:rgba(30,90,168,.14); }
.accordion__trigger[aria-expanded="true"]{ color:var(--ice); }
.accordion__trigger::after{
  content:"+";
  flex:0 0 auto;
  font-family:var(--font-mono);
  font-size:20px;
  line-height:1;
  color:var(--pulse);
  transition:transform .24s var(--ease);
}
.accordion__trigger[aria-expanded="true"]::after{
  content:"–";
  transform:rotate(180deg);
  color:var(--ice);
}
.accordion__panel{
  display:grid;
  grid-template-rows:0fr;
  transition:grid-template-rows .24s ease-out;
}
.accordion__item[data-open] .accordion__panel{
  grid-template-rows:1fr;
}
.accordion__inner{
  overflow:hidden;
  min-height:0;
}
.accordion__inner > *{
  padding:0 22px 20px;
}
.accordion__inner > *:first-child{ padding-top:2px; }

/* ---------- 14. 显现动画 ---------- */
html[data-js] [data-reveal]{
  opacity:0;
  transform:translateY(16px);
  transition:opacity .5s var(--ease), transform .5s var(--ease);
  transition-delay:calc(var(--order,0) * 80ms);
}
html[data-js] [data-reveal][data-revealed]{
  opacity:1;
  transform:none;
}

/* ---------- 15. 响应式 ---------- */
@media (min-width:768px){
  :root{ --gutter:32px; }
}

@media (min-width:1080px){
  .footer-grid{
    grid-template-columns:1.6fr .9fr .9fr .9fr 1.5fr;
    gap:34px 30px;
  }
  .footer-contact{ grid-column:auto; }
}

@media (max-width:1000px){
  .nav-toggle{ display:inline-flex; }

  .site-nav{
    position:absolute;
    top:100%;
    left:0;
    right:0;
    display:none;
    flex-direction:column;
    align-items:stretch;
    justify-content:flex-start;
    max-height:calc(100vh - 72px);
    overflow-y:auto;
    background:var(--abyss);
    border-bottom:2px solid var(--pulse);
    box-shadow:0 18px 32px rgba(6,16,33,.7);
  }
  .site-nav[data-open]{ display:block; }

  .site-nav__list{
    flex-direction:column;
    align-items:stretch;
    gap:0;
    padding:6px 0 12px;
  }
  .site-nav__link{
    display:block;
    padding:15px 22px;
    font-size:16px;
    border-bottom:1px solid rgba(42,74,120,.6);
    border-radius:0;
  }
  .site-nav__link[aria-current="page"]{
    background:rgba(255,77,46,.1);
  }
  .site-nav__link[aria-current="page"]::after{
    left:auto;
    right:22px;
    top:50%;
    bottom:auto;
    margin:-3px 0 0;
  }
}

@media (max-width:760px){
  body{ font-size:16px; }
  .bento{ grid-template-columns:repeat(6,minmax(0,1fr)); gap:16px; }
  .tile,
  .tile--s,
  .tile--m,
  .tile--l{
    grid-column:1 / -1;
    min-height:0;
    margin-top:0;
    padding:18px;
    box-shadow:var(--shadow-hard-sm);
  }
  .header-bar__cta{ padding:10px 14px; font-size:14px; }
  .brand__sub{ display:none; }
}

@media (max-width:560px){
  .header-top__meta{ display:none; }
  .footer-grid{ grid-template-columns:1fr; }
  .footer-contact{ grid-column:auto; }
  .nav-toggle__text{ display:none; }
}

/* ---------- 16. 减弱动效 ---------- */
@media (prefers-reduced-motion: reduce){
  html{ scroll-behavior:auto; }
  *,
  *::before,
  *::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
  }
  .header-top{ transition:none; }
  html[data-js] [data-reveal]{
    opacity:1;
    transform:none;
    transition:none;
  }
}