/* ===== 平博赛场 · 共享基础样式 /assets/site.css ===== */

:root{
  --ink:#070B0A;
  --ink-deep:#0C1A14;
  --turf:#12261C;
  --grid:#1E3A2C;
  --lime:#B6FF3B;
  --lime-soft:#DFFFA3;
  --orange:#FFA23A;
  --red:#FF4D4D;
  --fog:#E8F0EA;
  --moss:#9DB3A6;
  --moss-dim:#6E8C7C;
  --white:#FFFFFF;
  --font-display:"Barlow Condensed","Oswald","Arial Narrow",Arial,sans-serif;
  --font-mono:"IBM Plex Mono","Roboto Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
  --font-body:"Noto Sans SC","Source Han Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  --shell:1320px;
  --pad:clamp(20px,3.4vw,48px);
  --speed:180ms;
}

*,*::before,*::after{box-sizing:border-box}

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

body{
  margin:0;
  background:var(--ink);
  color:var(--fog);
  font-family:var(--font-body);
  font-size:16px;
  line-height:1.7;
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
}

h1,h2,h3,h4,h5,h6{
  margin:0;
  font-family:var(--font-display);
  font-weight:700;
  line-height:1.14;
  letter-spacing:.02em;
  color:var(--white);
}

h1{font-size:clamp(38px,6vw,76px)}
h2{font-size:clamp(28px,3.4vw,44px)}
h3{font-size:clamp(20px,2.2px + 1.2vw,28px)}

p{margin:0}

ul,ol{list-style:none;margin:0;padding:0}

a{color:inherit;text-decoration:none}

img,svg,video{display:block;max-width:100%;height:auto}

button{font:inherit;color:inherit;background:none;border:0}

::selection{background:var(--lime);color:var(--ink)}

:focus-visible{
  outline:2px solid var(--orange);
  outline-offset:3px;
}

/* ===== 通用容器与网格 ===== */

.shell{
  width:100%;
  max-width:var(--shell);
  margin:0 auto;
  padding-inline:var(--pad);
}

.grid-12{
  display:grid;
  grid-template-columns:repeat(12,minmax(0,1fr));
  gap:clamp(14px,1.6vw,24px);
}

@media (max-width:900px){
  .grid-12{grid-template-columns:repeat(6,minmax(0,1fr))}
}

@media (max-width:600px){
  .grid-12{grid-template-columns:repeat(2,minmax(0,1fr))}
}

/* ===== 按钮 ===== */

.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  padding:11px 20px;
  border:1px solid transparent;
  border-radius:0;
  font-family:var(--font-body);
  font-size:14px;
  font-weight:700;
  letter-spacing:.06em;
  line-height:1.2;
  cursor:pointer;
  transition:background-color var(--speed) ease,color var(--speed) ease,border-color var(--speed) ease;
}

.btn--accent{
  background:var(--lime);
  border-color:var(--lime);
  color:var(--ink);
}

.btn--accent:hover{
  background:var(--lime-soft);
  border-color:var(--lime-soft);
}

.btn--ghost{
  background:transparent;
  border-color:var(--grid);
  color:var(--fog);
}

.btn--ghost:hover{
  border-color:var(--lime);
  color:var(--lime);
}

/* ===== 跳转链接 ===== */

.skip-link{
  position:fixed;
  top:10px;
  left:10px;
  z-index:400;
  padding:10px 18px;
  background:var(--lime);
  color:var(--ink);
  font-size:14px;
  font-weight:700;
  letter-spacing:.06em;
  transform:translateY(-220%);
  transition:transform var(--speed) ease;
}

.skip-link:focus{
  transform:translateY(0);
}

/* ===== 头部：框架式展签导航 ===== */

.site-header{
  position:sticky;
  top:0;
  z-index:120;
  background:rgba(7,11,10,.95);
  border-bottom:1px solid var(--grid);
  -webkit-backdrop-filter:blur(10px);
  backdrop-filter:blur(10px);
  transition:box-shadow var(--speed) ease,border-color var(--speed) ease;
}

.site-header[data-scrolled="true"]{
  border-bottom-color:#2C5A42;
  box-shadow:0 14px 34px rgba(0,0,0,.52);
}

.site-header__inner{
  width:100%;
  max-width:var(--shell);
  margin:0 auto;
  padding-inline:var(--pad);
}

.site-header__top{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:clamp(12px,2vw,28px);
  padding-block:clamp(10px,1.4vw,16px);
}

.brand{
  display:inline-flex;
  align-items:center;
  gap:12px;
  min-width:0;
}

.brand__mark{
  display:grid;
  place-items:center;
  flex:0 0 auto;
  width:40px;
  height:40px;
  background:var(--lime);
  color:var(--ink);
  font-family:var(--font-display);
  font-size:18px;
  font-weight:800;
  letter-spacing:-.02em;
  clip-path:polygon(0 0,100% 0,100% 76%,76% 100%,0 100%);
  transition:background-color var(--speed) ease;
}

.brand:hover .brand__mark{background:var(--lime-soft)}

.brand__text{
  display:flex;
  flex-direction:column;
  min-width:0;
}

.brand__name{
  font-family:var(--font-display);
  font-size:21px;
  font-weight:800;
  letter-spacing:.18em;
  line-height:1.1;
  color:var(--white);
}

.brand__tagline{
  font-size:11px;
  letter-spacing:.22em;
  line-height:1.4;
  color:var(--moss);
}

.site-header__actions{
  display:flex;
  align-items:center;
  gap:10px;
  flex:0 0 auto;
}

.nav-toggle{
  display:none;
  align-items:center;
  gap:10px;
  padding:10px 14px;
  border:1px solid var(--grid);
  color:var(--fog);
  font-family:var(--font-display);
  font-size:13px;
  font-weight:700;
  letter-spacing:.2em;
  cursor:pointer;
  transition:border-color var(--speed) ease,color var(--speed) ease;
}

.nav-toggle:hover{
  border-color:var(--lime);
  color:var(--lime);
}

.nav-toggle__bars{
  display:inline-flex;
  flex-direction:column;
  gap:4px;
  width:16px;
}

.nav-toggle__bars span{
  display:block;
  height:2px;
  width:100%;
  background:currentColor;
  transition:transform var(--speed) 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);
}

.site-nav{border-top:1px solid var(--grid)}

.site-nav__list{
  display:grid;
  grid-template-columns:repeat(6,minmax(0,1fr));
}

.site-nav__item{border-left:1px solid var(--grid)}
.site-nav__item:last-child{border-right:1px solid var(--grid)}

.site-nav__link{
  display:flex;
  align-items:center;
  gap:9px;
  height:52px;
  padding:0 clamp(8px,1.2vw,18px);
  font-size:14px;
  font-weight:600;
  letter-spacing:.03em;
  color:var(--moss);
  transition:color var(--speed) ease,background-color var(--speed) ease,box-shadow var(--speed) ease;
}

.site-nav__index{
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:0;
  color:var(--orange);
  opacity:.72;
  transition:color var(--speed) ease,opacity var(--speed) ease;
}

.site-nav__label{white-space:nowrap}

.site-nav__link:hover{
  color:var(--fog);
  background:rgba(182,255,59,.08);
  box-shadow:inset 0 2px 0 var(--lime);
}

.site-nav__link:hover .site-nav__index{
  color:var(--lime);
  opacity:1;
}

.site-nav__link[aria-current="page"]{
  background:var(--lime);
  color:var(--ink);
  box-shadow:inset 0 2px 0 var(--lime-soft);
}

.site-nav__link[aria-current="page"] .site-nav__index{
  color:var(--ink);
  opacity:.55;
}

.header-meter{
  height:2px;
  background:var(--grid);
  overflow:hidden;
}

.header-meter__bar{
  display:block;
  width:100%;
  height:100%;
  background:linear-gradient(90deg,var(--lime) 0%,var(--lime) 62%,var(--orange) 100%);
  transform:scaleX(0);
  transform-origin:0 50%;
  transition:transform 120ms linear;
}

@media (max-width:899px){
  .nav-toggle{display:inline-flex}

  .site-nav{
    display:none;
    border-top:1px solid var(--grid);
    padding-bottom:2px;
  }

  .site-nav[data-open="true"]{display:block}

  .site-nav__list{
    grid-template-columns:repeat(2,minmax(0,1fr));
    border-top:0;
  }

  .site-nav__item{
    border-left:1px solid var(--grid);
    border-bottom:1px solid var(--grid);
  }

  .site-nav__item:nth-child(2n+1){border-left:0}

  .site-nav__link{
    height:auto;
    min-height:52px;
    padding:12px 14px;
  }
}

@media (max-width:600px){
  .brand__tagline{display:none}

  .btn--accent{
    padding:9px 13px;
    font-size:12px;
    letter-spacing:.04em;
  }
}

@media (max-width:560px){
  .site-nav__list{grid-template-columns:1fr}

  .site-nav__item{border-left:0}
  .site-nav__item:nth-child(2n+1){border-left:0}
}

/* ===== 页脚：多层信息板 ===== */

.site-footer{
  margin-top:clamp(48px,7vw,96px);
  background:var(--ink-deep);
  border-top:2px solid var(--lime);
  color:var(--moss);
}

.site-footer__inner{
  width:100%;
  max-width:var(--shell);
  margin:0 auto;
  padding:clamp(36px,5vw,66px) var(--pad) clamp(20px,3vw,28px);
  display:grid;
  gap:clamp(26px,3.4vw,44px);
}

.footer-grid{
  display:grid;
  grid-template-columns:1.7fr 1fr 1fr 1.5fr;
  gap:clamp(24px,3vw,44px);
}

.footer-brand__name{
  font-family:var(--font-display);
  font-size:clamp(26px,2.8vw,34px);
  font-weight:800;
  letter-spacing:.16em;
  line-height:1.1;
  color:var(--white);
  margin-bottom:12px;
}

.footer-brand__summary{
  max-width:34ch;
  margin-bottom:16px;
  font-size:14px;
  line-height:1.75;
  color:var(--moss);
}

.footer-note{
  max-width:36ch;
  font-size:12px;
  line-height:1.7;
  color:var(--moss-dim);
}

.footer-col__title{
  margin-bottom:14px;
  padding-bottom:10px;
  border-bottom:1px solid var(--grid);
  font-family:var(--font-display);
  font-size:12px;
  font-weight:700;
  letter-spacing:.26em;
  color:var(--lime);
}

.footer-col__list{
  display:grid;
  gap:10px;
}

.footer-col__link{
  display:inline-block;
  font-size:14px;
  color:var(--fog);
  border-bottom:1px solid transparent;
  transition:color var(--speed) ease,border-color var(--speed) ease;
}

.footer-col__link:hover{
  color:var(--lime);
  border-bottom-color:var(--lime);
}

.footer-contact__row{
  display:grid;
  gap:2px;
  padding:9px 0;
  border-bottom:1px dashed rgba(30,58,44,.85);
}

.footer-contact__row:last-child{border-bottom:0}

.footer-contact__label{
  font-family:var(--font-display);
  font-size:11px;
  letter-spacing:.22em;
  color:var(--moss-dim);
}

.footer-contact__value{
  font-size:14px;
  line-height:1.6;
  color:var(--fog);
  word-break:break-word;
}

.footer-contact__value--mono{
  font-family:var(--font-mono);
  font-size:13px;
  letter-spacing:.01em;
}

.footer-legal{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:12px 24px;
  padding-top:20px;
  border-top:1px solid var(--grid);
  font-size:12px;
  color:var(--moss);
}

.footer-legal__icp{
  font-family:var(--font-mono);
  letter-spacing:.04em;
  color:var(--moss);
}

.footer-legal__links{
  display:flex;
  flex-wrap:wrap;
  gap:8px 18px;
}

.footer-legal__link{
  color:var(--moss);
  border-bottom:1px solid var(--grid);
  transition:color var(--speed) ease,border-color var(--speed) ease;
}

.footer-legal__link:hover{
  color:var(--lime);
  border-bottom-color:var(--lime);
}

.footer-legal__copy{
  margin-left:auto;
  font-family:var(--font-mono);
  letter-spacing:.04em;
  color:var(--moss-dim);
}

@media (max-width:1024px){
  .footer-grid{grid-template-columns:1fr 1fr}
  .footer-brand{grid-column:1 / -1}
}

@media (max-width:620px){
  .footer-grid{grid-template-columns:1fr}
  .footer-legal{
    flex-direction:column;
    align-items:flex-start;
    gap:14px;
  }
  .footer-legal__copy{margin-left:0}
}

/* ===== 章节抬头与分隔 ===== */

.section-head{
  display:flex;
  flex-wrap:wrap;
  align-items:flex-end;
  justify-content:space-between;
  gap:12px 20px;
  padding-bottom:14px;
  margin-bottom:clamp(20px,2.6vw,32px);
  border-bottom:1px solid var(--grid);
}

.section-head__index{
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.14em;
  color:var(--orange);
}

.section-head__title{
  margin:0;
  font-size:clamp(24px,2.6vw,36px);
  letter-spacing:.04em;
}

.rule{
  height:2px;
  border:0;
  margin:0;
  background:var(--lime);
}

.rule--orange{background:var(--orange)}

/* ===== 标签、数字、面包屑、正文 ===== */

.tag{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:4px 10px;
  border:1px solid var(--grid);
  background:var(--turf);
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.08em;
  line-height:1.4;
  color:var(--lime-soft);
}

.tag--time{
  border-color:var(--orange);
  color:var(--orange);
}

.tag--live{
  border-color:var(--red);
  color:var(--red);
}

.tag--live::before{
  content:"";
  width:6px;
  height:6px;
  background:var(--red);
}

.num{
  font-family:var(--font-mono);
  font-variant-numeric:tabular-nums;
  letter-spacing:-.02em;
}

.breadcrumbs{
  padding:18px 0;
  font-size:12px;
  letter-spacing:.08em;
  color:var(--moss);
}

.breadcrumbs__list{
  display:flex;
  flex-wrap:wrap;
  gap:0;
}

.breadcrumbs__item + .breadcrumbs__item::before{
  content:"/";
  margin:0 8px;
  color:var(--grid);
}

.breadcrumbs__link{
  color:var(--moss);
  transition:color var(--speed) ease;
}

.breadcrumbs__link:hover{color:var(--lime)}

.breadcrumbs__current{color:var(--fog)}

.prose{
  max-width:68ch;
  font-size:17px;
  line-height:1.78;
  color:var(--fog);
}

.prose p{margin:0 0 1.1em}

.prose h2,.prose h3{
  margin:1.8em 0 .6em;
  color:var(--white);
}

.prose ul,.prose ol{
  margin:0 0 1.1em;
  padding-left:1.3em;
}

.prose ul{list-style:square}
.prose ol{list-style:decimal}

.prose li{margin:.35em 0}
.prose li::marker{color:var(--lime)}

.prose strong{color:var(--white)}

.prose a{
  color:var(--lime-soft);
  text-decoration:underline;
  text-underline-offset:3px;
}

.prose a:hover{color:var(--lime)}

/* ===== 可展开内容组 ===== */

.disclosure{border-top:1px solid var(--grid)}
.disclosure:last-of-type{border-bottom:1px solid var(--grid)}

.disclosure__trigger{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  width:100%;
  padding:16px 4px;
  font-family:var(--font-body);
  font-size:16px;
  font-weight:600;
  text-align:left;
  color:var(--fog);
  cursor:pointer;
  transition:color var(--speed) ease;
}

.disclosure__trigger:hover{color:var(--lime)}

.disclosure__icon{
  position:relative;
  flex:0 0 auto;
  width:16px;
  height:16px;
  border:1px solid var(--grid);
}

.disclosure__icon::before,
.disclosure__icon::after{
  content:"";
  position:absolute;
  top:50%;
  left:50%;
  background:var(--lime);
  transform:translate(-50%,-50%);
  transition:transform var(--speed) ease;
}

.disclosure__icon::before{width:8px;height:1px}
.disclosure__icon::after{width:1px;height:8px}

.disclosure__trigger[aria-expanded="true"] .disclosure__icon::after{
  transform:translate(-50%,-50%) scaleY(0);
}

.disclosure__trigger[aria-expanded="true"] .disclosure__icon{
  border-color:var(--orange);
}

.disclosure__panel{
  padding:0 4px 18px;
  font-size:15px;
  line-height:1.75;
  color:var(--moss);
}

.disclosure__panel[hidden]{display:none}

.disclosure__panel p{margin:0 0 .9em}
.disclosure__panel p:last-child{margin-bottom:0}

/* ===== 图片容器基础规则 ===== */

.media-frame{
  position:relative;
  display:block;
  overflow:hidden;
  aspect-ratio:16 / 9;
  background:var(--turf);
  border:1px solid var(--grid);
}

.media-frame img{
  width:100%;
  height:100%;
  object-fit:cover;
}

.media-frame::after{
  content:"";
  position:absolute;
  inset:0;
  pointer-events:none;
  background-image:
    linear-gradient(rgba(30,58,44,.55) 1px,transparent 1px),
    linear-gradient(90deg,rgba(30,58,44,.55) 1px,transparent 1px);
  background-size:36px 36px;
  opacity:.35;
}

.media-frame--wide{aspect-ratio:21 / 9}
.media-frame--tall{aspect-ratio:4 / 5}
.media-frame--square{aspect-ratio:1 / 1}

.media-frame__caption{
  position:absolute;
  inset:auto 0 0 0;
  z-index:2;
  padding:14px 16px;
  background:linear-gradient(180deg,rgba(7,11,10,0) 0%,rgba(7,11,10,.92) 100%);
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.04em;
  line-height:1.6;
  color:var(--fog);
}

/* ===== 动效降级 ===== */

@media (prefers-reduced-motion: reduce){
  html{scroll-behavior:auto}

  *,
  *::before,
  *::after{
    animation-duration:.01ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.01ms !important;
    scroll-behavior:auto !important;
  }

  .header-meter__bar{transition:none}
  .skip-link{transition:none}
}