/* ============================================================
   博业体育官网 · 共享样式表 /assets/site.css
   碳黑底 + 球场深绿分区 + 荧光绿锚点；1px 精密网格与刻度语言
   ============================================================ */

:root{
  --bg:#0B0F0E;
  --rail:#121A17;
  --panel:#1C2622;
  --grid:#2E3A35;
  --ink:#E8EDE9;
  --muted:#8C9A93;
  --accent:#B6FF3C;
  --accent-soft:#C9FF6B;
  --data:#2F6BFF;
  --warn:#FF7A2F;

  --font-display:'Archivo Narrow','Oswald','Arial Narrow','Noto Sans SC',system-ui,sans-serif;
  --font-head:'Noto Sans SC','Inter',system-ui,-apple-system,'Segoe UI',sans-serif;
  --font-body:'Noto Sans SC','Inter',system-ui,-apple-system,'Segoe UI',sans-serif;
  --font-mono:'JetBrains Mono','IBM Plex Mono',ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;

  --shell:1360px;
  --line:1px solid var(--grid);
  --top-band-h:64px;
  --main-band-h:52px;
  --header-offset:84px;
}

/* ---------- reset ---------- */
*,*::before,*::after{box-sizing:border-box}
html{
  -webkit-text-size-adjust:100%;
  text-size-adjust:100%;
  scroll-behavior:smooth;
}
html.nav-open{overflow:hidden}
body{
  margin:0;
  background:var(--bg);
  color:var(--ink);
  font-family:var(--font-body);
  font-size:17px;
  line-height:1.75;
  letter-spacing:.005em;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
img,svg,video{display:block;max-width:100%}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4,h5,p,figure{margin:0}
table{border-collapse:collapse;width:100%}
:focus-visible{outline:2px solid var(--accent);outline-offset:3px}
::selection{background:var(--accent);color:#08130A}

.mono,
.num,
.site-nav__index,
.brand__tagline,
.status-chip,
.breadcrumb__list,
.rail__title,
.rail__index,
.chapter__index,
.card__index,
.card__meta,
.tag,
.chip,
.stat__value,
.meter__meta,
.media-frame__cap,
.footer-masthead__status,
.footer-legal,
.footer-contact__value--mono,
.eyebrow{
  font-family:var(--font-mono);
  font-variant-numeric:tabular-nums;
  font-feature-settings:"tnum" 1;
}

#main-content{scroll-margin-top:var(--header-offset)}
[data-chapter]{scroll-margin-top:var(--header-offset)}

/* ---------- 容器 ---------- */
.shell{
  width:100%;
  max-width:var(--shell);
  margin-inline:auto;
  padding-inline:20px;
}
@media (min-width:768px){.shell{padding-inline:36px}}
@media (min-width:1200px){.shell{padding-inline:48px}}

/* ---------- 跳过链接 ---------- */
.skip-link{
  position:absolute;
  left:12px;
  top:-80px;
  z-index:200;
  padding:10px 18px;
  background:var(--accent);
  color:#08130A;
  font-size:14px;
  font-weight:600;
  letter-spacing:.04em;
  transition:top .18s ease;
}
.skip-link:focus{top:12px}

/* ============================================================
   头部
   ============================================================ */
.site-header{
  position:sticky;
  top:0;
  z-index:90;
  background:var(--bg);
}

/* 上层品牌带 */
.top-band{
  background:var(--rail);
  border-bottom:var(--line);
  overflow:hidden;
  max-height:110px;
  transition:max-height .3s ease,opacity .22s ease,border-color .3s ease;
}
.site-header[data-scrolled] .top-band{
  max-height:0;
  opacity:0;
  border-bottom-color:transparent;
}
.top-band__inner{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:20px;
  min-height:var(--top-band-h);
  padding-block:10px;
}
.top-band__meta{
  display:none;
  margin-inline:auto;
}
@media (min-width:1024px){.top-band__meta{display:block}}
.top-band__actions{
  display:flex;
  align-items:center;
  gap:18px;
  flex:0 0 auto;
}

/* 品牌 */
.brand{
  display:flex;
  align-items:center;
  gap:12px;
  min-width:0;
  flex:0 0 auto;
}
.brand__mark{
  display:grid;
  place-items:center;
  width:34px;
  height:34px;
  flex:0 0 auto;
  background:var(--accent);
  color:#08130A;
  font-family:var(--font-display);
  font-weight:700;
  font-size:15px;
  letter-spacing:.03em;
  line-height:1;
}
.brand__text{display:flex;flex-direction:column;min-width:0}
.brand__name{
  font-family:var(--font-head);
  font-weight:600;
  font-size:16px;
  line-height:1.25;
  letter-spacing:.05em;
  color:var(--ink);
  white-space:nowrap;
}
.brand__tagline{
  font-size:11px;
  line-height:1.5;
  letter-spacing:.06em;
  color:var(--muted);
  white-space:nowrap;
}

/* 状态胶囊 */
.status-chip{
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:5px 12px;
  border:var(--line);
  background:var(--panel);
  font-size:11px;
  letter-spacing:.08em;
  color:var(--muted);
}
.status-chip__dot{
  width:6px;
  height:6px;
  flex:0 0 auto;
  background:var(--accent);
}

/* 按钮与文本链接 */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  padding:9px 16px;
  border:var(--line);
  background:var(--panel);
  color:var(--ink);
  font-size:13px;
  letter-spacing:.04em;
  line-height:1.4;
  border-radius:0;
  transition:background-color .18s ease,border-color .18s ease,color .18s ease;
}
.btn:hover{border-color:var(--muted)}
.btn--accent{
  background:var(--accent);
  border-color:var(--accent);
  color:#08130A;
  font-weight:600;
}
.btn--accent:hover{
  background:var(--accent-soft);
  border-color:var(--accent-soft);
}
.btn--ghost{background:transparent;color:var(--muted)}
.btn--ghost:hover{color:var(--ink);border-color:var(--muted)}
.link-quiet{
  font-size:13px;
  letter-spacing:.04em;
  color:var(--muted);
  border-bottom:1px solid transparent;
  transition:color .18s ease,border-color .18s ease;
}
.link-quiet:hover{color:var(--accent);border-bottom-color:var(--accent)}

/* 下层栏目带 */
.main-band{
  position:relative;
  z-index:2;
  background:var(--bg);
  border-bottom:var(--line);
}
.main-band__inner{
  position:relative;
  z-index:2;
  display:flex;
  align-items:center;
  gap:16px;
  min-height:var(--main-band-h);
}
.site-nav{flex:1 1 auto;min-width:0}
.site-nav__list{display:flex;align-items:stretch;gap:2px}
.site-nav__item{display:flex}
.site-nav__link{
  position:relative;
  display:inline-flex;
  align-items:center;
  gap:8px;
  min-height:var(--main-band-h);
  padding:0 15px;
  color:var(--muted);
  font-size:15px;
  letter-spacing:.02em;
  transition:color .18s ease,background-color .18s ease;
}
.site-nav__link:hover{color:var(--ink);background:rgba(232,237,233,.045)}
.site-nav__index{
  font-size:10px;
  line-height:1;
  letter-spacing:.06em;
  color:var(--grid);
  transition:color .18s ease;
}
.site-nav__link:hover .site-nav__index{color:var(--muted)}
.site-nav__link[aria-current="page"]{color:var(--accent)}
.site-nav__link[aria-current="page"] .site-nav__index{color:var(--accent)}
.site-nav__link[aria-current="page"]::after{
  content:"";
  position:absolute;
  left:15px;
  right:15px;
  bottom:-1px;
  height:2px;
  background:var(--accent);
}
.site-nav__service{display:none}

/* 移动端按钮 */
.nav-toggle{
  display:none;
  align-items:center;
  gap:9px;
  position:relative;
  z-index:3;
  padding:8px 12px;
  border:var(--line);
  color:var(--ink);
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.08em;
  background:var(--bg);
  border-radius:0;
}
.nav-toggle:hover{border-color:var(--muted)}
.nav-toggle__bars{
  position:relative;
  display:block;
  width:16px;
  height:12px;
  flex:0 0 auto;
}
.nav-toggle__bars::before,
.nav-toggle__bars::after{
  content:"";
  position:absolute;
  left:0;
  width:16px;
  height:1.5px;
  background:currentColor;
  transition:transform .2s ease,opacity .2s ease;
}
.nav-toggle__bars::before{top:2px}
.nav-toggle__bars::after{bottom:2px}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::before{transform:translateY(3.25px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::after{transform:translateY(-3.25px) rotate(-45deg)}

/* 测试版角标 */
.chip{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:4px 10px;
  border:var(--line);
  background:transparent;
  font-size:11px;
  letter-spacing:.06em;
  color:var(--muted);
  white-space:nowrap;
  border-radius:0;
}
.chip--warn{
  color:var(--warn);
  border-color:rgba(255,122,47,.45);
  background:rgba(255,122,47,.08);
}
.chip--xs{font-size:10px;padding:2px 7px}
.main-band__chip{display:none;margin-left:auto;flex:0 0 auto}
@media (min-width:1100px){.main-band__chip{display:inline-flex}}

/* 阅读进度条 */
.scroll-progress{
  position:absolute;
  left:0;
  right:0;
  bottom:0;
  height:2px;
  overflow:hidden;
  pointer-events:none;
}
.scroll-progress__bar{
  display:block;
  width:100%;
  height:100%;
  background:var(--accent);
  transform:scaleX(0);
  transform-origin:0 50%;
  will-change:transform;
}

/* ---------- 移动抽屉 ---------- */
@media (max-width:960px){
  .nav-toggle{display:inline-flex}

  .site-nav{
    position:fixed;
    inset:0;
    z-index:1;
    display:flex;
    flex-direction:column;
    padding:calc(var(--main-band-h) + 34px) 22px 48px;
    overflow-y:auto;
    background:var(--bg);
    background-image:
      linear-gradient(rgba(46,58,53,.55) 1px,transparent 1px),
      linear-gradient(90deg,rgba(46,58,53,.55) 1px,transparent 1px);
    background-size:64px 64px;
    opacity:0;
    visibility:hidden;
    transform:translateY(-12px);
    pointer-events:none;
    transition:opacity .22s ease,transform .22s ease,visibility .22s ease;
  }
  .site-nav[data-open]{
    opacity:1;
    visibility:visible;
    transform:none;
    pointer-events:auto;
  }
  .site-nav__list{
    flex-direction:column;
    align-items:stretch;
    gap:0;
    border-top:var(--line);
  }
  .site-nav__item{display:block;border-bottom:var(--line)}
  .site-nav__link{
    width:100%;
    min-height:0;
    justify-content:flex-start;
    gap:14px;
    padding:16px 6px;
    font-family:var(--font-display);
    font-size:20px;
    letter-spacing:.04em;
    color:var(--ink);
  }
  .site-nav__index{font-size:12px}
  .site-nav__link[aria-current="page"]::after{left:6px;right:6px;bottom:-1px}

  .site-nav__service{display:block;margin-top:34px}
  .site-nav__group-title{
    padding-bottom:10px;
    margin-bottom:4px;
    border-bottom:var(--line);
    font-family:var(--font-mono);
    font-size:11px;
    letter-spacing:.2em;
    color:var(--muted);
  }
  .service-list{display:flex;flex-direction:column}
  .service-list__item + .service-list__item{border-top:1px solid rgba(46,58,53,.7)}
  .service-list__link{
    display:flex;
    align-items:center;
    justify-content:space-between;
    gap:12px;
    padding:13px 6px;
    font-size:15px;
    color:var(--muted);
    transition:color .18s ease;
  }
  .service-list__link::after{
    content:"→";
    font-family:var(--font-mono);
    font-size:12px;
    color:var(--grid);
  }
  .service-list__link:hover{color:var(--accent)}
}

@media (max-width:720px){
  .brand__tagline{display:none}
  .link-quiet{display:none}
  .btn{padding:8px 12px;font-size:12px}
}

/* ============================================================
   页脚
   ============================================================ */
.site-footer{
  margin-top:auto;
  background:var(--rail);
  border-top:var(--line);
}
.footer-masthead{
  display:flex;
  flex-wrap:wrap;
  align-items:flex-end;
  gap:18px 40px;
  padding:44px 0 30px;
  border-bottom:var(--line);
}
.footer-masthead__note{
  flex:1 1 320px;
  max-width:56ch;
  font-size:14px;
  line-height:1.85;
  color:var(--muted);
}
.footer-masthead__status{
  font-size:11px;
  letter-spacing:.06em;
  color:var(--muted);
  white-space:nowrap;
}
.footer-grid{
  display:grid;
  grid-template-columns:1fr;
  gap:1px;
  background:var(--grid);
  border-bottom:var(--line);
}
@media (min-width:640px){.footer-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media (min-width:1100px){.footer-grid{grid-template-columns:repeat(4,minmax(0,1fr))}}
.footer-col{
  background:var(--rail);
  padding:28px 22px 32px;
}
.footer-col__title{
  position:relative;
  padding-left:14px;
  margin-bottom:18px;
  font-family:var(--font-head);
  font-size:13px;
  font-weight:600;
  letter-spacing:.1em;
  color:var(--ink);
}
.footer-col__title::before{
  content:"";
  position:absolute;
  left:0;
  top:.62em;
  width:6px;
  height:6px;
  background:var(--accent);
}
.footer-col__note{margin-top:16px}
.footer-list li{
  font-size:14px;
  line-height:2.05;
  color:var(--muted);
}
.footer-list__link{
  display:inline-block;
  color:var(--muted);
  transition:color .18s ease;
}
.footer-list__link:hover{color:var(--accent)}
.footer-list__text{display:inline-block}
.footer-contact{display:flex;flex-direction:column;gap:14px}
.footer-contact__row{display:flex;flex-direction:column;gap:4px}
.footer-contact__label{
  font-family:var(--font-mono);
  font-size:10.5px;
  letter-spacing:.14em;
  color:var(--muted);
}
.footer-contact__value{
  font-size:14px;
  line-height:1.7;
  color:var(--ink);
  word-break:break-word;
}
.footer-contact__value--mono{font-size:13px;letter-spacing:-.01em}
.footer-legal{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:12px 28px;
  padding:22px 0 34px;
  font-size:12.5px;
  letter-spacing:.03em;
  color:var(--muted);
}
.footer-legal a{
  color:var(--muted);
  border-bottom:1px solid var(--grid);
  transition:color .18s ease,border-color .18s ease;
}
.footer-legal a:hover{color:var(--accent);border-bottom-color:var(--accent)}
.footer-legal__icp{color:var(--muted);opacity:.72}

/* ============================================================
   通用版式组件
   ============================================================ */
.page-shell{
  display:grid;
  grid-template-columns:1fr;
  align-items:start;
}
@media (min-width:1024px){
  .page-shell{grid-template-columns:236px minmax(0,1fr);column-gap:56px}
}

.rail{display:none}
@media (min-width:1024px){
  .rail{
    display:block;
    position:sticky;
    top:76px;
    padding:40px 0 44px;
    border-right:var(--line);
    padding-right:28px;
  }
}
.rail__title{
  padding-bottom:12px;
  margin-bottom:14px;
  border-bottom:var(--line);
  font-size:10.5px;
  letter-spacing:.18em;
  color:var(--muted);
}
.rail__nav{display:flex;flex-direction:column;gap:2px}
.rail__link{
  display:grid;
  grid-template-columns:26px minmax(0,1fr);
  gap:8px;
  align-items:baseline;
  width:100%;
  padding:8px 10px 8px 12px;
  border-left:2px solid transparent;
  text-align:left;
  font-size:14px;
  line-height:1.6;
  color:var(--muted);
  transition:color .18s ease,border-color .18s ease,background-color .18s ease;
}
.rail__link:hover{color:var(--ink);background:rgba(232,237,233,.03)}
.rail__link.is-current{color:var(--accent);border-left-color:var(--accent)}
.rail__index{font-size:10.5px;color:var(--grid)}
.rail__link.is-current .rail__index{color:var(--accent)}
.rail__note{margin-top:22px}

.eyebrow{
  display:inline-block;
  font-size:11px;
  letter-spacing:.16em;
  color:var(--muted);
}
.lede{font-size:18px;line-height:1.85;color:var(--ink)}
.section-rule{height:1px;margin:48px 0;border:0;background:var(--grid)}
.note{
  position:relative;
  padding-left:16px;
  font-size:14px;
  line-height:1.8;
  color:var(--muted);
}
.note::before{
  content:"";
  position:absolute;
  left:0;
  top:6px;
  bottom:6px;
  width:1px;
  background:var(--grid);
}
.note--accent::before{background:var(--accent)}

/* 面包屑 */
.breadcrumb{padding:18px 0;border-bottom:var(--line)}
.breadcrumb__list{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:10px;
  font-size:11.5px;
  letter-spacing:.06em;
  color:var(--muted);
}
.breadcrumb__item{display:inline-flex;align-items:center;gap:10px}
.breadcrumb__item + .breadcrumb__item::before{content:"/";color:var(--grid)}
.breadcrumb__link{color:var(--muted);transition:color .18s ease}
.breadcrumb__link:hover{color:var(--accent)}
.breadcrumb__current{color:var(--ink)}

/* 显示级标题 */
.display{
  font-family:var(--font-display);
  font-weight:300;
  font-size:clamp(2.6rem,6vw,5.2rem);
  line-height:1.02;
  letter-spacing:-.02em;
  color:var(--ink);
}
.display em{font-style:normal;color:var(--accent)}

/* 框景首屏 */
.frame{
  position:relative;
  border:var(--line);
  padding:clamp(22px,3vw,44px);
  background:var(--rail);
}
.frame::before,
.frame::after{
  content:"";
  position:absolute;
  width:16px;
  height:16px;
  pointer-events:none;
}
.frame::before{
  top:-1px;
  left:-1px;
  border-top:2px solid var(--accent);
  border-left:2px solid var(--accent);
}
.frame::after{
  bottom:-1px;
  right:-1px;
  border-bottom:2px solid var(--accent);
  border-right:2px solid var(--accent);
}
.frame__ticks{
  position:absolute;
  left:16px;
  right:16px;
  height:6px;
  pointer-events:none;
  background-image:repeating-linear-gradient(90deg,var(--grid) 0 1px,transparent 1px 16px);
}
.frame__ticks--top{top:-1px}
.frame__ticks--bottom{bottom:-1px}
.frame__meta{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:10px 18px;
  margin-bottom:24px;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.1em;
  color:var(--muted);
}

/* 章节 */
.chapter{
  padding:60px 0 46px;
  border-top:var(--line);
}
.chapter:first-child{border-top:0}
.chapter__head{
  display:grid;
  grid-template-columns:1fr;
  gap:12px;
  margin-bottom:32px;
}
@media (min-width:768px){
  .chapter__head{grid-template-columns:96px minmax(0,1fr);gap:0 28px}
}
.chapter__index{
  padding-top:12px;
  font-size:12px;
  letter-spacing:.14em;
  color:var(--accent);
}
.chapter__title{
  font-family:var(--font-display);
  font-weight:300;
  font-size:clamp(1.5rem,2.6vw,2.2rem);
  line-height:1.2;
  letter-spacing:-.01em;
  color:var(--ink);
}
.chapter__lede{
  margin-top:12px;
  max-width:62ch;
  font-size:16px;
  line-height:1.85;
  color:var(--muted);
}
.chapter__body{display:block}

/* 数据拼版 */
.data-grid{
  display:grid;
  grid-template-columns:1fr;
  gap:1px;
  background:var(--grid);
  border:var(--line);
}
.data-cell{background:var(--bg);padding:20px 18px}
@media (min-width:640px){
  .data-grid--2{grid-template-columns:repeat(2,minmax(0,1fr))}
  .data-grid--3{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media (min-width:960px){
  .data-grid--3{grid-template-columns:repeat(3,minmax(0,1fr))}
}

/* 大数字 */
.stat{display:flex;flex-direction:column;gap:6px}
.stat__value{
  font-size:clamp(1.8rem,3.4vw,2.6rem);
  line-height:1;
  letter-spacing:-.02em;
  color:var(--accent);
}
.stat__label{font-size:12.5px;letter-spacing:.04em;color:var(--muted)}
.stat--data .stat__value{color:var(--data)}
.stat--ink .stat__value{color:var(--ink)}

/* 面板 */
.panel{background:var(--panel);border:var(--line)}
.panel__head{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:12px;
  padding:12px 16px;
  border-bottom:var(--line);
}
.panel__title{
  font-family:var(--font-head);
  font-size:13px;
  font-weight:600;
  letter-spacing:.08em;
  color:var(--ink);
}
.panel__body{padding:18px 16px}

/* 折叠面板 */
.accordion{background:var(--panel);border:var(--line)}
.accordion__item + .accordion__item{border-top:var(--line)}
.accordion__trigger{
  display:flex;
  align-items:center;
  gap:14px;
  width:100%;
  padding:15px 16px;
  text-align:left;
  font-size:15px;
  color:var(--ink);
  transition:background-color .18s ease;
}
.accordion__trigger:hover{background:rgba(182,255,60,.06)}
.accordion__index{
  flex:0 0 auto;
  font-family:var(--font-mono);
  font-size:11px;
  color:var(--muted);
}
.accordion__label{flex:1 1 auto}
.accordion__icon{
  position:relative;
  width:12px;
  height:12px;
  flex:0 0 auto;
}
.accordion__icon::before,
.accordion__icon::after{
  content:"";
  position:absolute;
  background:var(--accent);
  transition:transform .2s ease,opacity .2s ease;
}
.accordion__icon::before{left:0;top:50%;width:12px;height:1.5px;transform:translateY(-50%)}
.accordion__icon::after{top:0;left:50%;width:1.5px;height:12px;transform:translateX(-50%)}
.accordion__trigger[aria-expanded="true"] .accordion__icon::after{
  transform:translateX(-50%) scaleY(0);
  opacity:0;
}
.accordion__panel{
  padding:0 16px 20px;
  font-size:15px;
  line-height:1.85;
  color:var(--muted);
}
.accordion__panel[hidden]{display:none}

/* 刻度条 */
.meter{display:flex;flex-direction:column;gap:8px}
.meter__track{
  position:relative;
  height:6px;
  background:var(--panel);
  border:var(--line);
}
.meter__fill{
  display:block;
  height:100%;
  width:0;
  background:var(--accent);
  transition:width .7s ease;
}
.meter--data .meter__fill{background:var(--data)}
.meter__meta{
  display:flex;
  justify-content:space-between;
  gap:12px;
  font-size:11px;
  letter-spacing:.04em;
  color:var(--muted);
}

/* 图片容器 */
.figure{margin:0}
.figure__cap{
  margin-top:10px;
  font-size:12.5px;
  line-height:1.7;
  color:var(--muted);
}
.media-frame{
  position:relative;
  display:block;
  width:100%;
  overflow:hidden;
  background:var(--rail);
  border:var(--line);
}
.media-frame::after{
  content:"";
  position:absolute;
  inset:0;
  z-index:1;
  pointer-events:none;
  opacity:.55;
  background-image:
    linear-gradient(rgba(46,58,53,.6) 1px,transparent 1px),
    linear-gradient(90deg,rgba(46,58,53,.6) 1px,transparent 1px);
  background-size:48px 48px;
}
.media-frame img{
  width:100%;
  height:100%;
  object-fit:cover;
  filter:contrast(1.06) saturate(.92) brightness(.9);
}
.media-frame--wide{aspect-ratio:16/9}
.media-frame--tall{aspect-ratio:3/4}
.media-frame--square{aspect-ratio:1/1}
.media-frame--map{aspect-ratio:4/3}
.media-frame__cap{
  position:absolute;
  left:0;
  bottom:0;
  z-index:2;
  padding:8px 12px;
  background:rgba(11,15,14,.88);
  border-top:var(--line);
  border-right:var(--line);
  font-size:11px;
  letter-spacing:.06em;
  color:var(--muted);
}

/* 卡片阵列 */
.card-grid{
  display:grid;
  grid-template-columns:1fr;
  gap:1px;
  background:var(--grid);
  border-top:var(--line);
  border-bottom:var(--line);
}
@media (min-width:720px){.card-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media (min-width:1100px){.card-grid--3{grid-template-columns:repeat(3,minmax(0,1fr))}}
.card{
  position:relative;
  display:flex;
  flex-direction:column;
  gap:10px;
  padding:22px 20px 26px;
  background:var(--bg);
  transition:background-color .18s ease;
}
.card:hover{background:var(--panel)}
.card__index{
  font-size:11px;
  letter-spacing:.14em;
  color:var(--muted);
}
.card__title{
  font-family:var(--font-head);
  font-size:18px;
  font-weight:600;
  line-height:1.5;
  color:var(--ink);
}
.card__text{
  font-size:14.5px;
  line-height:1.85;
  color:var(--muted);
}
.card__meta{
  margin-top:auto;
  display:flex;
  align-items:center;
  gap:10px;
  font-size:11px;
  letter-spacing:.06em;
  color:var(--muted);
}

/* 标签 */
.tag{
  display:inline-flex;
  align-items:center;
  padding:3px 9px;
  border:var(--line);
  font-size:10.5px;
  letter-spacing:.1em;
  color:var(--muted);
}
.tag--accent{color:var(--accent);border-color:rgba(182,255,60,.4)}
.tag--data{color:var(--data);border-color:rgba(47,107,255,.45)}
.tag--warn{color:var(--warn);border-color:rgba(255,122,47,.45)}

/* 箭头链接 */
.link-arrow{
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding-bottom:3px;
  border-bottom:1px solid var(--grid);
  font-size:14px;
  color:var(--ink);
  transition:border-color .18s ease,color .18s ease;
}
.link-arrow::after{
  content:"→";
  font-family:var(--font-mono);
  font-size:13px;
  color:var(--accent);
  transition:transform .2s ease;
}
.link-arrow:hover{border-bottom-color:var(--accent)}
.link-arrow:hover::after{transform:translateX(3px)}

/* 长文 */
.prose{
  max-width:70ch;
  font-size:16.5px;
  line-height:1.9;
  color:var(--ink);
}
.prose p + p{margin-top:1.1em}
.prose h3{
  margin-top:2em;
  font-family:var(--font-head);
  font-size:18px;
  font-weight:600;
  letter-spacing:.01em;
}
.prose ul{margin-top:1em;display:flex;flex-direction:column;gap:8px}
.prose ul li{position:relative;padding-left:18px;color:var(--muted)}
.prose ul li::before{
  content:"";
  position:absolute;
  left:0;
  top:.85em;
  width:8px;
  height:1px;
  background:var(--accent);
}
.prose strong{color:var(--accent);font-weight:600}

/* ---------- 滚动显现 ---------- */
[data-reveal]{
  opacity:0;
  transform:translateY(12px);
  transition:opacity .5s ease,transform .5s ease;
}
[data-reveal="1"]{transition-delay:.12s}
[data-reveal="2"]{transition-delay:.24s}
[data-reveal="3"]{transition-delay:.36s}
[data-reveal="4"]{transition-delay:.48s}
[data-reveal="5"]{transition-delay:.6s}
[data-reveal="6"]{transition-delay:.72s}
[data-reveal].is-visible{opacity:1;transform:none}

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