/* ==========================================================================
   美博赛场 · MEIBO ARENA — 共享外壳样式 /assets/site.css
   ========================================================================== */

:root{
  --night-900:#060B1B;
  --night-800:#0C1530;
  --night-600:#16244A;
  --steel:#2A3A63;
  --cyan:#2BE3C7;
  --cyan-soft:#8FF5E4;
  --gold:#F2B33D;
  --gold-deep:#B77A1A;
  --signal:#FF4D3D;
  --snow:#F4F7FF;
  --mist:#A9B4CC;
  --cream:#E9EEF9;

  --font-display:"Noto Sans SC","Source Han Sans SC",system-ui,-apple-system,"Segoe UI",sans-serif;
  --font-body:"Noto Sans SC",system-ui,-apple-system,"Segoe UI",sans-serif;
  --font-mono:"JetBrains Mono","IBM Plex Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;

  --shell:1200px;
  --cut:16px;
  --ease:cubic-bezier(.16,1,.3,1);
}

/* ---------- reset ---------- */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{margin:0}
img,picture,svg,video{max-width:100%;height:auto;display:block}
button,input,select,textarea{font:inherit;color:inherit}
button{background:none;border:0;padding:0;cursor:pointer}
a{color:inherit;text-decoration:none}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4,h5,h6,p,figure,blockquote{margin:0}
table{border-collapse:collapse;width:100%}
:focus-visible{outline:2px solid var(--cyan);outline-offset:3px;border-radius:2px}
::selection{background:var(--cyan);color:var(--night-900)}

body{
  background:var(--night-900);
  color:var(--snow);
  font-family:var(--font-body);
  font-size:16px;
  font-weight:400;
  line-height:1.75;
  overflow-x:hidden;
  -webkit-font-smoothing:antialiased;
}

/* ---------- 中文排版与索引元素 ---------- */
.mono,
.index,
.season-badge-num,
.footer-contact-key,
.copyright,
.breadcrumbs,
.eyebrow,
.tag{
  font-family:var(--font-mono);
  font-variant-numeric:tabular-nums;
  font-feature-settings:"tnum" 1;
}

.h-display{
  font-family:var(--font-display);
  font-weight:900;
  font-size:clamp(2.1rem,6.2vw,4.2rem);
  line-height:1.02;
  letter-spacing:-.02em;
}
.h-section{
  font-family:var(--font-display);
  font-weight:800;
  font-size:clamp(1.45rem,3.2vw,2.15rem);
  line-height:1.18;
  letter-spacing:-.01em;
}
.eyebrow{
  display:inline-block;
  font-size:11px;
  font-weight:700;
  letter-spacing:.24em;
  text-transform:uppercase;
  color:var(--cyan);
}
.lede{
  font-size:17px;
  line-height:1.75;
  color:var(--mist);
  max-width:66ch;
}
.prose{
  font-size:16.5px;
  line-height:1.8;
  color:var(--mist);
  max-width:70ch;
}
.prose p + p{margin-top:1em}
.prose strong{color:var(--snow);font-weight:700}

/* ---------- 容器与节奏 ---------- */
.shell{
  width:100%;
  max-width:var(--shell);
  margin:0 auto;
  padding-left:20px;
  padding-right:20px;
}
@media (min-width:640px){
  .shell{padding-left:32px;padding-right:32px}
}
@media (min-width:1024px){
  .shell{padding-left:48px;padding-right:48px}
}

.section{padding:58px 0}
.section--tight{padding:34px 0}
.section-head{display:grid;gap:12px;margin-bottom:28px}
.slash-rule{
  height:1px;
  border:0;
  margin:0;
  background-image:repeating-linear-gradient(90deg,var(--steel) 0 12px,transparent 12px 22px);
}

/* ---------- 跳过链接 ---------- */
.skip-link{
  position:absolute;
  left:0;
  top:0;
  z-index:200;
  padding:12px 20px;
  background:var(--cyan);
  color:var(--night-900);
  font-weight:700;
  font-size:14px;
  letter-spacing:.04em;
  transform:translateY(-140%);
  transition:transform .22s var(--ease);
}
.skip-link:focus{transform:translateY(0)}

/* ---------- 页头 · 居中刊头 ---------- */
.site-header{
  position:sticky;
  top:0;
  z-index:90;
  background:rgba(6,11,27,.9);
  -webkit-backdrop-filter:blur(12px);
  backdrop-filter:blur(12px);
  border-bottom:1px solid var(--steel);
  transition:background .3s var(--ease),box-shadow .3s var(--ease);
}
.site-header::before{
  content:"";
  position:absolute;
  left:0;
  right:0;
  top:0;
  height:2px;
  background:linear-gradient(90deg,var(--cyan),var(--gold) 56%,var(--signal));
  opacity:.9;
  pointer-events:none;
}
.site-header[data-scrolled]{
  background:rgba(6,11,27,.985);
  box-shadow:0 16px 40px -28px rgba(0,0,0,.95);
}
.header-inner{position:relative;display:block}

.masthead{
  display:grid;
  grid-template-columns:1fr auto 1fr;
  grid-template-areas:"status brand season";
  align-items:center;
  gap:16px;
  padding:16px 0 13px;
}
.masthead-status{
  grid-area:status;
  justify-self:start;
  max-width:24ch;
  padding-left:11px;
  border-left:2px solid var(--cyan);
  font-size:12px;
  line-height:1.55;
  letter-spacing:.06em;
  color:var(--mist);
}

.brand{
  grid-area:brand;
  justify-self:center;
  display:flex;
  align-items:center;
  gap:12px;
}
.brand-mark{
  display:grid;
  place-items:center;
  width:42px;
  height:42px;
  flex:none;
  background:linear-gradient(140deg,var(--cyan),var(--gold));
  color:var(--night-900);
  font-family:var(--font-mono);
  font-weight:700;
  font-size:13px;
  letter-spacing:.02em;
  clip-path:polygon(0 0,100% 0,100% 70%,70% 100%,0 100%);
}
.brand-text{display:block}
.brand-name{
  display:block;
  font-family:var(--font-display);
  font-size:22px;
  font-weight:900;
  line-height:1.1;
  letter-spacing:-.02em;
  color:var(--snow);
}
.brand-sub{
  display:block;
  margin-top:2px;
  font-family:var(--font-mono);
  font-size:10.5px;
  font-weight:500;
  letter-spacing:.22em;
  color:var(--cyan);
}

.season-badge{
  grid-area:season;
  justify-self:end;
  display:flex;
  align-items:baseline;
  gap:9px;
  padding:7px 15px;
  border:1px solid var(--gold-deep);
  background:linear-gradient(120deg,rgba(242,179,61,.16),rgba(43,227,199,.10));
  clip-path:polygon(10px 0,100% 0,100% calc(100% - 10px),calc(100% - 10px) 100%,0 100%,0 10px);
}
.season-badge-label{
  font-family:var(--font-mono);
  font-size:10px;
  font-weight:700;
  letter-spacing:.2em;
  color:var(--gold);
}
.season-badge-num{
  font-size:20px;
  font-weight:700;
  line-height:1;
  color:var(--snow);
}

/* ---------- 移动导航按钮 ---------- */
.nav-toggle{
  grid-area:toggle;
  display:none;
  align-items:center;
  gap:10px;
  padding:9px 14px;
  border:1px solid var(--steel);
  background:var(--night-800);
  color:var(--snow);
  font-size:13px;
  font-weight:700;
  letter-spacing:.12em;
  clip-path:polygon(8px 0,100% 0,100% calc(100% - 8px),calc(100% - 8px) 100%,0 100%,0 8px);
}
.nav-toggle-bars{display:grid;gap:4px;width:18px}
.nav-toggle-bars i{display:block;height:2px;background:var(--cyan);transition:transform .24s var(--ease),opacity .18s linear}
.site-header[data-open] .nav-toggle-bars i:nth-child(1){transform:translateY(6px) rotate(45deg)}
.site-header[data-open] .nav-toggle-bars i:nth-child(2){opacity:0}
.site-header[data-open] .nav-toggle-bars i:nth-child(3){transform:translateY(-6px) rotate(-45deg)}

/* ---------- 栏目导航 ---------- */
.site-nav{border-top:1px solid var(--steel)}
.nav-list{display:flex;justify-content:center;flex-wrap:wrap}
.nav-item{position:relative}
@media (min-width:881px){
  .nav-item + .nav-item{border-left:1px solid rgba(42,58,99,.65)}
}
.nav-link{
  display:block;
  position:relative;
  padding:14px 22px;
  font-family:var(--font-display);
  font-size:15px;
  font-weight:700;
  letter-spacing:.06em;
  color:var(--mist);
  transition:color .2s var(--ease);
}
.nav-link::after{
  content:"";
  position:absolute;
  left:22px;
  right:22px;
  bottom:7px;
  height:2px;
  background:linear-gradient(90deg,var(--cyan),var(--gold));
  transform:scaleX(0);
  transform-origin:left center;
  transition:transform .28s var(--ease);
}
.nav-link:hover{color:var(--snow)}
.nav-link:hover::after{transform:scaleX(1)}
.nav-link[aria-current="page"]{color:var(--snow)}
.nav-link[aria-current="page"]::after{transform:scaleX(1)}

/* ---------- 阅读进度条 ---------- */
.scroll-meter{
  position:absolute;
  left:0;
  bottom:-1px;
  width:100%;
  height:2px;
  transform:scaleX(var(--progress,0));
  transform-origin:left center;
  background:linear-gradient(90deg,var(--cyan),var(--gold) 62%,var(--signal));
  transition:transform .14s linear;
  pointer-events:none;
}

/* ---------- 悬浮比分条 ---------- */
.score-rail{
  position:fixed;
  right:0;
  top:50%;
  transform:translateY(-50%);
  z-index:80;
  display:flex;
  flex-direction:column;
  border:1px solid var(--steel);
  border-right:0;
  background:rgba(12,21,48,.95);
  -webkit-backdrop-filter:blur(8px);
  backdrop-filter:blur(8px);
  clip-path:polygon(14px 0,100% 0,100% 100%,14px 100%,0 calc(100% - 14px),0 14px);
}
.score-rail-head{
  padding:12px 0 8px;
  text-align:center;
  font-family:var(--font-mono);
  font-size:10px;
  letter-spacing:.2em;
  color:var(--cyan);
  writing-mode:vertical-rl;
  align-self:center;
}
.score-rail-item{
  display:flex;
  flex-direction:row;
  align-items:center;
  justify-content:center;
  gap:14px;
  padding:18px 13px;
  border-top:1px solid rgba(42,58,99,.75);
  color:var(--mist);
  writing-mode:vertical-rl;
  transition:color .24s var(--ease),background .24s var(--ease);
}
.score-rail-item:hover{color:var(--snow);background:rgba(43,227,199,.08)}
.score-rail-item[data-active="true"]{
  color:var(--snow);
  background:rgba(43,227,199,.12);
}
.rail-text{
  font-family:var(--font-display);
  font-size:13px;
  font-weight:700;
  letter-spacing:.24em;
}
.rail-index{
  font-family:var(--font-mono);
  font-size:10px;
  letter-spacing:.1em;
  color:var(--steel);
}
.score-rail-item[data-active="true"] .rail-index{color:var(--cyan)}
.rail-dot{
  width:7px;
  height:7px;
  flex:none;
  background:var(--cyan);
  box-shadow:0 0 10px rgba(43,227,199,.9);
}
.score-rail-item.is-signal .rail-dot{
  background:var(--signal);
  box-shadow:0 0 10px rgba(255,77,61,.85);
  animation:railPulse 2s ease-in-out infinite;
}
@keyframes railPulse{
  0%,100%{opacity:1;transform:scale(1)}
  50%{opacity:.42;transform:scale(.7)}
}

@media (max-width:1179px){
  .score-rail{
    top:auto;
    bottom:0;
    left:0;
    right:0;
    transform:none;
    flex-direction:row;
    border:0;
    border-top:1px solid var(--steel);
    clip-path:none;
    background:rgba(6,11,27,.97);
  }
  .score-rail-head{display:none}
  .score-rail-item{
    flex:1 1 0;
    writing-mode:horizontal-tb;
    flex-direction:row;
    padding:13px 10px;
    border-top:0;
    border-left:1px solid rgba(42,58,99,.75);
    gap:8px;
  }
  .score-rail-item:first-of-type{border-left:0}
  .rail-text{letter-spacing:.1em;font-size:13.5px}
  body{padding-bottom:54px}
}

/* ---------- 页脚 ---------- */
.site-footer{
  position:relative;
  margin-top:64px;
  background:var(--night-900);
  border-top:1px solid var(--steel);
}
.site-footer::before{
  content:"";
  position:absolute;
  left:0;
  right:0;
  top:-1px;
  height:2px;
  background:linear-gradient(90deg,rgba(43,227,199,0),var(--cyan) 20%,var(--gold) 68%,rgba(255,77,61,0));
  opacity:.75;
  pointer-events:none;
}
.footer-inner{
  display:grid;
  grid-template-columns:minmax(230px,1.1fr) 2fr;
  gap:40px 56px;
  padding-top:56px;
  padding-bottom:34px;
}
.footer-brand-lockup{display:inline-block}
.footer-brand-name{
  display:block;
  font-family:var(--font-display);
  font-size:24px;
  font-weight:900;
  line-height:1.15;
  letter-spacing:-.02em;
  color:var(--snow);
}
.footer-brand-sub{
  display:block;
  margin-top:4px;
  font-family:var(--font-mono);
  font-size:10.5px;
  letter-spacing:.22em;
  color:var(--cyan);
}
.footer-brand-line{
  margin-top:16px;
  max-width:34ch;
  font-size:13.5px;
  line-height:1.75;
  color:var(--mist);
}
.footer-cols{
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  gap:28px 24px;
}
.footer-col-title{
  font-family:var(--font-mono);
  font-size:11px;
  font-weight:700;
  letter-spacing:.2em;
  text-transform:uppercase;
  color:var(--gold);
  padding-bottom:12px;
  margin-bottom:12px;
  border-bottom:1px solid var(--steel);
}
.footer-list{display:grid;gap:9px}
.footer-link{
  display:inline-block;
  font-size:14.5px;
  color:var(--mist);
  transition:color .2s var(--ease),transform .2s var(--ease);
}
.footer-link:hover{color:var(--cyan);transform:translateX(3px)}

.footer-contact{
  --cut:18px;
  display:grid;
  grid-template-columns:180px 1fr;
  gap:14px 40px;
  align-items:start;
  margin-top:6px;
  padding:26px 30px;
}
.footer-contact-title{
  grid-column:1;
  font-family:var(--font-mono);
  font-size:11.5px;
  font-weight:700;
  letter-spacing:.2em;
  color:var(--gold);
  text-transform:uppercase;
}
.footer-contact-list{grid-column:2;display:grid;gap:10px}
.footer-contact-item{display:flex;gap:16px;flex-wrap:wrap;font-size:14.5px}
.footer-contact-key{
  flex:0 0 82px;
  font-size:11.5px;
  letter-spacing:.12em;
  color:var(--mist);
  padding-top:3px;
}
.footer-contact-val{color:var(--snow);word-break:break-word}
.footer-note{
  grid-column:2;
  margin-top:4px;
  padding-top:12px;
  border-top:1px dashed var(--steel);
  font-size:12.5px;
  line-height:1.7;
  color:var(--mist);
}

.footer-legal{
  display:flex;
  flex-wrap:wrap;
  gap:12px 32px;
  justify-content:space-between;
  align-items:baseline;
  margin-top:32px;
  padding:22px 0 30px;
  border-top:1px solid var(--steel);
}
.legal-line{
  max-width:72ch;
  font-size:12.5px;
  line-height:1.7;
  color:var(--mist);
}
.copyright{
  font-size:12px;
  letter-spacing:.06em;
  color:var(--mist);
}

/* ---------- 按钮 ---------- */
.btn{
  --cut:10px;
  display:inline-flex;
  align-items:center;
  gap:10px;
  padding:13px 26px;
  border:1px solid var(--steel);
  background:var(--night-800);
  color:var(--snow);
  font-family:var(--font-display);
  font-size:15px;
  font-weight:700;
  letter-spacing:.05em;
  clip-path:polygon(var(--cut) 0,100% 0,100% calc(100% - var(--cut)),calc(100% - var(--cut)) 100%,0 100%,0 var(--cut));
  transition:transform .24s var(--ease),border-color .24s var(--ease),background .24s var(--ease),color .24s var(--ease);
}
.btn:hover{transform:translateY(-2px);border-color:var(--cyan);color:var(--cyan-soft)}
.btn--primary{
  background:linear-gradient(115deg,var(--cyan),#46D8EA 42%,var(--gold));
  border-color:transparent;
  color:var(--night-900);
}
.btn--primary:hover{color:var(--night-900);border-color:transparent}
.btn--ghost{background:transparent}

/* ---------- 面包屑 ---------- */
.breadcrumbs{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px;
  padding:18px 0;
  font-size:12px;
  letter-spacing:.08em;
  color:var(--mist);
}
.breadcrumbs li{display:flex;align-items:center;gap:8px}
.breadcrumbs li + li::before{content:"/";color:var(--steel)}
.breadcrumbs a:hover{color:var(--cyan)}

/* ---------- 标签与切角面板 ---------- */
.tag{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:4px 10px;
  border:1px solid var(--steel);
  font-size:11px;
  font-weight:700;
  letter-spacing:.14em;
  text-transform:uppercase;
  color:var(--mist);
}
.tag--cyan{color:var(--cyan);border-color:rgba(43,227,199,.42)}
.tag--gold{color:var(--gold);border-color:var(--gold-deep)}
.tag--signal{color:var(--signal);border-color:rgba(255,77,61,.48)}

.cut-panel{
  --cut:16px;
  position:relative;
  background:var(--night-800);
  border:1px solid var(--steel);
  padding:22px 24px;
  clip-path:polygon(var(--cut) 0,100% 0,100% calc(100% - var(--cut)),calc(100% - var(--cut)) 100%,0 100%,0 var(--cut));
}

/* ---------- 网格 ---------- */
.grid-12{
  display:grid;
  grid-template-columns:repeat(12,minmax(0,1fr));
  gap:24px;
}
.col-4{grid-column:span 4}
.col-6{grid-column:span 6}
.col-8{grid-column:span 8}
.col-12{grid-column:span 12}
.offset-1{grid-column-start:2}
@media (max-width:1023px){
  .grid-12{grid-template-columns:repeat(6,minmax(0,1fr));gap:20px}
  .col-4{grid-column:span 3}
  .col-6{grid-column:span 6}
  .col-8{grid-column:span 6}
  .offset-1{grid-column-start:auto}
}
@media (max-width:700px){
  .grid-12{grid-template-columns:minmax(0,1fr);gap:16px}
  .col-4,.col-6,.col-8,.col-12{grid-column:span 1}
  .offset-1{grid-column-start:auto}
}

/* ---------- 刻度条 ---------- */
.meter{
  position:relative;
  height:6px;
  background:var(--night-600);
  overflow:hidden;
}
.meter-fill{
  display:block;
  height:100%;
  width:var(--value,50%);
  background:linear-gradient(90deg,var(--cyan),var(--gold));
}
.meter-ticks{
  height:10px;
  background-image:repeating-linear-gradient(90deg,var(--steel) 0 1px,transparent 1px 8px);
  opacity:.7;
}

/* ---------- 图片容器基础规则（页面阶段放入占位图） ---------- */
.media-frame{
  position:relative;
  display:block;
  overflow:hidden;
  aspect-ratio:16/9;
  border:1px solid var(--steel);
  background:linear-gradient(150deg,var(--night-800),var(--night-600));
}
.media-frame--wide{aspect-ratio:21/9}
.media-frame--tall{aspect-ratio:3/4}
.media-frame--square{aspect-ratio:1/1}
.media-frame > img,
.media-frame > picture > img{
  width:100%;
  height:100%;
  object-fit:cover;
}
.media-frame::after{
  content:"";
  position:absolute;
  inset:0;
  background:linear-gradient(112deg,rgba(6,11,27,.86) 0%,rgba(6,11,27,.34) 46%,rgba(22,36,74,0) 100%);
  pointer-events:none;
}
.media-frame::before{
  content:"";
  position:absolute;
  inset:0;
  z-index:2;
  background-image:repeating-linear-gradient(0deg,rgba(244,247,255,.03) 0 1px,transparent 1px 3px);
  pointer-events:none;
}
.media-caption{
  display:block;
  margin-top:10px;
  font-size:12.5px;
  line-height:1.7;
  color:var(--mist);
}

/* ---------- 滚动显现 ---------- */
.has-js [data-reveal]{
  opacity:0;
  transform:translateY(16px);
  transition:opacity .5s var(--ease),transform .5s var(--ease);
  transition-delay:var(--d,0ms);
}
.has-js [data-reveal].is-revealed{
  opacity:1;
  transform:none;
}

/* ---------- 中屏微调 ---------- */
@media (max-width:1080px){
  .masthead-status{display:none}
  .masthead{grid-template-columns:1fr auto 1fr;grid-template-areas:". brand season"}
}
@media (max-width:880px){
  .masthead{
    grid-template-columns:1fr auto;
    grid-template-areas:
      "brand toggle"
      "badge badge";
    gap:12px;
    padding:13px 0 11px;
  }
  .brand{justify-self:start}
  .season-badge{grid-area:badge;justify-self:start}
  .nav-toggle{display:inline-flex;justify-self:end}

  .site-nav{display:none;padding:6px 0 16px}
  .site-header[data-open] .site-nav{display:block}
  .nav-list{flex-direction:column;justify-content:flex-start}
  .nav-item + .nav-item{border-left:0}
  .nav-link{
    padding:14px 2px;
    font-size:17px;
    border-bottom:1px solid rgba(42,58,99,.6);
  }
  .nav-link::after{left:2px;right:auto;width:34px;bottom:10px}

  .footer-inner{grid-template-columns:minmax(0,1fr);gap:32px;padding-top:44px}
  .footer-cols{grid-template-columns:repeat(2,minmax(0,1fr))}
  .footer-contact{grid-template-columns:minmax(0,1fr);gap:12px;padding:22px 20px}
  .footer-contact-title{grid-column:1}
  .footer-contact-list{grid-column:1}
  .footer-note{grid-column:1}
  .footer-legal{flex-direction:column;align-items:flex-start}
}
@media (max-width:560px){
  .footer-cols{grid-template-columns:minmax(0,1fr)}
  .brand-name{font-size:20px}
  .season-badge-num{font-size:18px}
  .nav-toggle{padding:8px 12px;font-size:12px}
}

/* ---------- reduced motion ---------- */
@media (prefers-reduced-motion: reduce){
  html{scroll-behavior:auto}
  .has-js [data-reveal],
  .has-js [data-reveal].is-revealed{
    opacity:1;
    transform:none;
    transition:opacity .15s linear;
    transition-delay:0ms !important;
  }
  .btn,
  .btn:hover,
  .footer-link,
  .footer-link:hover,
  .skip-link{
    transform:none;
  }
  .btn,
  .footer-link,
  .nav-link,
  .nav-link::after,
  .score-rail-item{
    transition-duration:.01ms;
  }
  .scroll-meter{transition:none}
  .score-rail-item.is-signal .rail-dot{animation:none}
}