/* ============================================================
   爱游戏赛事 · 竞技干线 — 共享样式 /assets/site.css
   1 令牌 · 2 重置 · 3 排版 · 4 布局 · 5 按钮 · 6 标签 · 7 面板
   8 数据条 · 9 研究板 · 10 折叠 · 11 筛选 · 12 目录 · 13 面包屑
   14 页头 · 15 图片框 · 16 头部 · 17 页脚 · 18 显现 · 19 响应式 · 20 动效降级
   ============================================================ */

/* ---------- 1 令牌 ---------- */
:root{
  --ink-950:#06090F;
  --panel:#0E1622;
  --steel:#16202E;
  --hair:#26333F;
  --cyan:#22E0D0;
  --cyan-deep:#0C6E68;
  --gold:#F2B33D;
  --alert:#FF4D4D;
  --paper:#F3F0E6;
  --text:#E9EFF5;
  --mist:#A6B4C2;
  --mint:#7CF8E4;

  --rail-w:72px;
  --bar-h:0px;
  --shell-max:1240px;
  --radius:2px;

  --font-display:"Barlow Condensed","Oswald","PingFang SC","Noto Sans SC","Microsoft YaHei",sans-serif;
  --font-body:"Inter","Noto Sans SC","PingFang SC",system-ui,-apple-system,"Microsoft YaHei",sans-serif;
  --font-mono:"JetBrains Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,"Noto Sans SC",monospace;

  --ease-out:cubic-bezier(.2,.7,.3,1);
}

/* ---------- 2 重置 ---------- */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body,h1,h2,h3,h4,h5,p,ul,ol,li,figure,blockquote,dl,dd{margin:0}
ul,ol{padding:0}
ul[class],ol[class]{list-style:none}
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}
table{border-collapse:collapse}
[hidden]{display:none !important}
#main-content{display:block;outline:none}
:focus:not(:focus-visible){outline:none}
:focus-visible{outline:2px solid var(--mint);outline-offset:2px;border-radius:var(--radius)}

/* ---------- 3 排版 ---------- */
body{
  min-height:100vh;
  padding-left:var(--rail-w);
  padding-top:var(--bar-h);
  background-color:var(--ink-950);
  background-image:
    radial-gradient(circle at 1px 1px, rgba(166,180,194,.055) 1px, transparent 1.6px),
    repeating-linear-gradient(180deg, rgba(34,224,208,.022) 0 1px, transparent 1px 5px);
  background-size:24px 24px, 100% 5px;
  background-attachment:fixed;
  color:var(--text);
  font-family:var(--font-body);
  font-size:16.5px;
  line-height:1.75;
  letter-spacing:.012em;
  overflow-x:hidden;
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4,h5{
  font-family:var(--font-display);
  font-weight:700;
  line-height:1.14;
  letter-spacing:.02em;
  text-wrap:balance;
}
h1{font-size:clamp(30px,5.5vw,60px)}
h2{font-size:clamp(22px,3vw,32px);font-weight:600}
h3{font-size:clamp(17px,1.6vw,21px);font-weight:600}
p{line-height:1.75}
strong{color:var(--text);font-weight:600}
small{font-size:12.5px;color:var(--mist)}
.num,.metric__value,.data-table,.data-strip__item,.footer-meta,.rail__index{
  font-family:var(--font-mono);
  font-variant-numeric:tabular-nums;
}
::selection{background:var(--cyan);color:#04120F}

/* ---------- 4 布局 ---------- */
.container{width:min(100% - 40px, var(--shell-max));margin-inline:auto}
.section{padding-block:clamp(40px,6vw,88px)}
.section--tight{padding-block:clamp(24px,3.4vw,44px)}
.stack>*+*{margin-top:16px}
.stack--lg>*+*{margin-top:28px}
.grid-12{display:grid;grid-template-columns:repeat(12,minmax(0,1fr));gap:clamp(14px,1.6vw,24px)}
.col-4{grid-column:span 4}
.col-5{grid-column:span 5}
.col-6{grid-column:span 6}
.col-7{grid-column:span 7}
.col-8{grid-column:span 8}
.col-12{grid-column:span 12}
.prose{max-width:72ch;color:var(--mist)}
.prose p{max-width:68ch;margin-top:14px}
.prose p:first-child{margin-top:0}
.prose strong{color:var(--text)}
.prose ul{margin-top:14px;padding-left:18px;list-style:none}
.prose li{position:relative;margin-top:8px}
.prose li::before{content:"";position:absolute;left:-16px;top:.72em;width:8px;height:1px;background:var(--cyan-deep)}
.eyebrow{
  display:inline-flex;align-items:center;gap:10px;
  font:600 11px/1 var(--font-mono);letter-spacing:.24em;text-transform:uppercase;color:var(--cyan);
}
.eyebrow::before{content:"";width:22px;height:1px;background:var(--gold)}
.rule{border:0;border-top:1px solid var(--hair);margin-block:clamp(24px,3vw,40px)}

/* ---------- 5 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:12px 20px;border:1px solid var(--hair);border-radius:var(--radius);
  background:transparent;color:var(--text);
  font:600 12px/1 var(--font-mono);letter-spacing:.12em;
  transition:background-color .22s ease,color .22s ease,border-color .22s ease,transform .22s var(--ease-out);
}
.btn:hover{transform:translateY(-1px)}
.btn--primary{border-color:var(--mint);background:linear-gradient(180deg,var(--cyan),var(--cyan-deep));color:#04120F}
.btn--primary:hover{background:var(--cyan);color:#04120F}
.btn--ghost{border-color:var(--cyan-deep);color:var(--mint)}
.btn--ghost:hover{background:rgba(34,224,208,.12);border-color:var(--cyan)}
.btn--ink{border-color:#06090F;background:#06090F;color:var(--paper)}
.btn--ink:hover{background:var(--steel);border-color:var(--cyan);color:var(--cyan)}
.btn--sm{padding:9px 14px;font-size:11px}

/* ---------- 6 标签 ---------- */
.chip{
  display:inline-flex;align-items:center;gap:6px;
  padding:5px 10px;border:1px solid var(--hair);border-radius:var(--radius);
  background:rgba(22,32,46,.72);color:var(--mist);
  font:600 10.5px/1 var(--font-mono);letter-spacing:.14em;text-transform:uppercase;
}
.chip--cyan{color:var(--mint);border-color:var(--cyan-deep);background:rgba(12,110,104,.22)}
.chip--gold{color:var(--gold);border-color:rgba(242,179,61,.4)}
.chip--alert{color:var(--alert);border-color:rgba(255,77,77,.42)}
.chip--live::before{
  content:"";width:6px;height:6px;border-radius:50%;background:var(--cyan);
  animation:pulse 2.4s ease-in-out infinite;
}
@keyframes pulse{
  0%,100%{opacity:.6;box-shadow:0 0 0 0 rgba(34,224,208,.42)}
  50%{opacity:1;box-shadow:0 0 0 6px rgba(34,224,208,0)}
}

/* ---------- 7 面板 ---------- */
.panel{
  position:relative;padding:clamp(18px,2.4vw,26px);
  background:linear-gradient(160deg,rgba(14,22,34,.96),rgba(9,14,22,.96));
  border:1px solid var(--hair);border-radius:var(--radius);
  box-shadow:0 20px 44px -34px rgba(0,0,0,.95);
}
.panel::before{
  content:"";position:absolute;top:-1px;left:-1px;width:10px;height:10px;
  border-top:1px solid var(--cyan);border-left:1px solid var(--cyan);
}
.panel__head{
  display:flex;align-items:flex-start;justify-content:space-between;gap:14px;
  padding-bottom:14px;margin-bottom:16px;border-bottom:1px solid var(--hair);
}
.panel__title{font-family:var(--font-display);font-weight:600;font-size:18px;letter-spacing:.04em}
.panel__code{font:600 10px/1.4 var(--font-mono);letter-spacing:.16em;color:var(--mist);white-space:nowrap}
.panel--steel{background:var(--steel)}
.panel--paper{background:var(--paper);color:#0A0F16;border-color:#D8D2C1;box-shadow:none}
.panel--paper::before{border-color:#06090F}
.panel--paper .panel__title{color:#06090F}
.panel--paper .panel__code{color:var(--cyan-deep)}
.panel--paper p{color:#3A4653}

.chapter{position:relative}
.chapter__head{display:flex;flex-wrap:wrap;align-items:baseline;gap:8px 18px;margin-bottom:18px}
.chapter__num{font:700 clamp(34px,6vw,68px)/.9 var(--font-mono);color:var(--gold);letter-spacing:-.02em}
.chapter__title{font-family:var(--font-display);font-weight:600;font-size:clamp(20px,2.6vw,30px);letter-spacing:.02em}
.chapter__kicker{font:600 10px/1 var(--font-mono);letter-spacing:.24em;text-transform:uppercase;color:var(--mist)}

.callout-paper{
  background:var(--paper);color:#0A0F16;padding:clamp(18px,2.4vw,26px);
  border-left:3px solid var(--gold);border-radius:var(--radius);
}
.callout-paper__value{font:700 clamp(26px,4vw,44px)/1 var(--font-mono);color:#06090F;font-variant-numeric:tabular-nums}
.callout-paper__label{margin-top:8px;font:500 12px/1.6 var(--font-mono);letter-spacing:.12em;color:#3A4653}

/* ---------- 8 数据条 ---------- */
.data-strip{
  display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));
  gap:1px;background:var(--hair);border:1px solid var(--hair);border-radius:var(--radius);
}
.data-strip__item{display:flex;flex-direction:column;gap:6px;padding:16px 18px;background:#0B1118}
.metric__value{font:600 clamp(20px,2.6vw,28px)/1.1 var(--font-mono);color:var(--text)}
.metric__value--cyan{color:var(--cyan)}
.metric__value--gold{color:var(--gold)}
.metric__value--alert{color:var(--alert)}
.metric__label{font:500 11px/1.4 var(--font-mono);letter-spacing:.14em;color:var(--mist)}

.table-wrap{overflow-x:auto;border:1px solid var(--hair);border-radius:var(--radius)}
.data-table{width:100%;font-size:13.5px;line-height:1.6}
.data-table th,.data-table td{padding:11px 13px;text-align:left;border-bottom:1px solid var(--hair)}
.data-table thead th{background:var(--steel);color:var(--mist);font-weight:600;letter-spacing:.1em;white-space:nowrap}
.data-table td{color:var(--text)}
.data-table tbody tr:hover{background:rgba(34,224,208,.05)}
.data-table tbody tr:last-child td{border-bottom:0}

/* ---------- 9 专题研究板 ---------- */
.dossier{display:grid;gap:1px;background:var(--hair);border:1px solid var(--hair);border-radius:var(--radius)}
.dossier__row{display:grid;grid-template-columns:minmax(112px,178px) 1fr;gap:16px;padding:16px 18px;background:#0B1118}
.dossier__key{font:600 11px/1.7 var(--font-mono);letter-spacing:.16em;text-transform:uppercase;color:var(--cyan)}
.dossier__val{color:var(--mist)}
.dossier__val strong{color:var(--text)}
.dossier__row--more .dossier__key{color:var(--gold)}

/* ---------- 10 折叠 ---------- */
.fold{border:1px solid var(--hair);border-radius:var(--radius);background:#0B1118}
.fold+.fold{margin-top:10px}
.fold__sum{
  display:flex;align-items:center;justify-content:space-between;gap:12px;
  padding:14px 16px;cursor:pointer;list-style:none;
  background:var(--steel);color:var(--text);
  font-family:var(--font-display);font-weight:600;font-size:16px;letter-spacing:.03em;
}
.fold__sum::-webkit-details-marker{display:none}
.fold__sum::after{content:"+";font:600 16px/1 var(--font-mono);color:var(--cyan);transition:transform .25s var(--ease-out)}
.fold[open] .fold__sum::after{transform:rotate(45deg)}
.fold__sum:hover{color:var(--mint)}
.fold__body{padding:16px;border-top:1px solid var(--hair);color:var(--mist)}

/* ---------- 11 筛选 ---------- */
.filter-bar{display:flex;flex-wrap:wrap;gap:8px}
.filter-bar__btn{
  padding:8px 14px;border:1px solid var(--hair);border-radius:var(--radius);
  color:var(--mist);font:600 11px/1 var(--font-mono);letter-spacing:.12em;
  transition:background-color .2s,color .2s,border-color .2s;
}
.filter-bar__btn:hover{color:var(--mint);border-color:var(--cyan-deep)}
.filter-bar__btn[aria-pressed="true"]{background:var(--cyan);border-color:var(--cyan);color:#04120F}
[data-filter-item][hidden]{display:none !important}

/* ---------- 12 章节目录 ---------- */
.toc{position:sticky;top:calc(var(--bar-h) + 18px);display:flex;flex-direction:column;gap:2px;padding-left:13px;border-left:1px solid var(--hair)}
.toc__link{padding:6px 0;font:500 12px/1.6 var(--font-mono);letter-spacing:.08em;color:var(--mist);transition:color .2s}
.toc__link:hover{color:var(--text)}
.toc__link[aria-current="true"]{color:var(--cyan)}

/* ---------- 13 面包屑 ---------- */
.breadcrumb{padding:14px 0}
.breadcrumb__list{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font:500 11px/1 var(--font-mono);letter-spacing:.1em;color:var(--mist)}
.breadcrumb__item+.breadcrumb__item::before{content:"/";margin-right:8px;color:var(--cyan-deep)}
.breadcrumb__link:hover{color:var(--cyan)}
.breadcrumb__item[aria-current="page"]{color:var(--text)}

/* ---------- 14 页头 ---------- */
.page-head{position:relative;overflow:hidden;padding:clamp(30px,5.4vw,68px) 0 clamp(20px,3vw,36px)}
.page-head::after{
  content:"";position:absolute;top:-40%;right:-6%;width:44%;height:190%;
  background:linear-gradient(140deg,rgba(34,224,208,.18),rgba(34,224,208,0) 62%);
  transform:skewX(-14deg);pointer-events:none;
}
.page-head__kicker{font:600 11px/1 var(--font-mono);letter-spacing:.26em;text-transform:uppercase;color:var(--gold)}
.page-head__title{position:relative;margin-top:14px;font-weight:700;letter-spacing:.02em}
.page-head__lede{position:relative;margin-top:16px;max-width:64ch;color:var(--mist)}

/* ---------- 15 图片框 ---------- */
.img-frame{
  position:relative;overflow:hidden;border:1px solid var(--hair);border-radius:var(--radius);
  background:
    linear-gradient(135deg,rgba(34,224,208,.10),rgba(6,9,15,0) 58%),
    repeating-linear-gradient(90deg,rgba(38,51,63,.55) 0 1px,transparent 1px 46px),
    repeating-linear-gradient(0deg,rgba(38,51,63,.55) 0 1px,transparent 1px 46px),
    #0B1118;
}
.img-frame>img{width:100%;height:100%;object-fit:cover}
.img-frame::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background:repeating-linear-gradient(180deg,rgba(34,224,208,.05) 0 1px,transparent 1px 4px);
}
.img-frame--wide{aspect-ratio:16/9}
.img-frame--square{aspect-ratio:1/1}
.img-frame--portrait{aspect-ratio:3/4}
.img-frame__tag{
  position:absolute;left:10px;bottom:10px;z-index:1;
  padding:5px 9px;background:rgba(6,9,15,.82);border:1px solid var(--hair);
  font:600 10px/1 var(--font-mono);letter-spacing:.14em;color:var(--mint);
}

/* ---------- 16 头部 ---------- */
.skip-link{
  position:fixed;top:10px;left:12px;z-index:200;
  transform:translateY(-180%);
  padding:10px 16px;border-radius:var(--radius);
  background:var(--cyan);color:#04120F;
  font:600 13px/1 var(--font-mono);letter-spacing:.08em;
  transition:transform .2s var(--ease-out);
}
.skip-link:focus{transform:none}

.site-header{
  position:fixed;top:0;left:0;bottom:0;z-index:80;
  width:var(--rail-w);
  display:flex;flex-direction:column;align-items:stretch;
  background:linear-gradient(180deg,#0A121C 0%,#06090F 56%,#080D14 100%);
  border-right:1px solid var(--hair);
}
.frame-top{
  position:fixed;top:0;left:0;right:0;height:1px;z-index:91;pointer-events:none;
  background:linear-gradient(90deg,var(--cyan) 0%,rgba(34,224,208,.32) 44%,rgba(242,179,61,.5) 100%);
}
.scroll-progress{position:fixed;top:0;left:0;right:0;height:2px;z-index:92;pointer-events:none}
.scroll-progress__bar{
  display:block;height:100%;width:100%;transform:scaleX(0);transform-origin:left center;
  background:linear-gradient(90deg,var(--cyan),var(--mint) 55%,var(--gold));
}

.brand{
  display:flex;flex-direction:column;align-items:center;gap:10px;
  padding:14px 8px 16px;border-bottom:1px solid var(--hair);
  transition:background-color .2s;
}
.brand:hover{background:rgba(34,224,208,.06)}
.brand__mark{
  display:grid;place-items:center;width:38px;height:38px;
  border:1px solid var(--cyan);border-radius:var(--radius);
  background:linear-gradient(135deg,rgba(34,224,208,.16),rgba(12,110,104,0) 62%);
  color:var(--cyan);font:700 13px/1 var(--font-mono);letter-spacing:.06em;
}
.brand__text{display:flex;flex-direction:column;align-items:center;gap:8px}
.brand__name{
  writing-mode:vertical-rl;text-orientation:upright;
  font-family:var(--font-display);font-weight:700;font-size:15px;letter-spacing:.2em;color:var(--text);
}
.brand__sub{
  writing-mode:vertical-rl;text-orientation:upright;
  font:600 10px/1 var(--font-mono);letter-spacing:.3em;color:var(--gold);
}

.mbar-now{display:none}

.nav-toggle{display:none;align-items:center;gap:8px;padding:8px 10px;border:1px solid var(--hair);border-radius:var(--radius);color:var(--text);font:600 11px/1 var(--font-mono);letter-spacing:.12em}
.nav-toggle__bars{position:relative;display:block;width:16px;height:10px}
.nav-toggle__bars::before,.nav-toggle__bars::after{content:"";position:absolute;left:0;right:0;height:1.5px;background:currentColor;transition:transform .25s var(--ease-out)}
.nav-toggle__bars::before{top:1px}
.nav-toggle__bars::after{bottom:1px}
.nav-toggle[aria-expanded="true"]{color:var(--cyan);border-color:var(--cyan-deep)}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::before{transform:translateY(3px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::after{transform:translateY(-3px) rotate(-45deg)}

.rail{display:flex;flex-direction:column;flex:1 1 auto;min-height:0;overflow-y:auto;overscroll-behavior:contain;padding:8px 0}
.rail__list{display:flex;flex-direction:column;gap:2px}
.rail__link{
  position:relative;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:3px;
  min-height:56px;padding:8px 4px;color:var(--mist);
  transition:color .2s ease,background-color .2s ease;
}
.rail__link::before{
  content:"";position:absolute;left:0;top:0;width:3px;height:100%;
  background:var(--cyan);transform:scaleY(0);transform-origin:bottom center;
  transition:transform .28s var(--ease-out);
}
.rail__link:hover{color:var(--text);background:rgba(22,32,46,.72)}
.rail__link:hover::before{transform:scaleY(.45)}
.rail__link[aria-current="page"]{color:var(--cyan);background:linear-gradient(90deg,rgba(34,224,208,.14),rgba(34,224,208,0))}
.rail__link[aria-current="page"]::before{transform:scaleY(1)}
.rail__link[aria-current="page"]::after{
  content:"";position:absolute;right:8px;top:10px;width:4px;height:4px;background:var(--mint);
  transform:rotate(45deg);
}
.rail__index{font:600 11px/1 var(--font-mono);letter-spacing:.06em;color:var(--gold)}
.rail__link[aria-current="page"] .rail__index{color:var(--mint)}
.rail__label{font-size:12px;line-height:1.2;letter-spacing:.04em}

.rail__foot{
  display:flex;flex-direction:column;align-items:center;gap:14px;
  padding:14px 8px 18px;border-top:1px solid var(--hair);
}
.rail__cta{
  display:inline-flex;align-items:center;justify-content:center;
  writing-mode:vertical-rl;text-orientation:upright;
  padding:16px 7px;border:1px solid var(--cyan);border-radius:var(--radius);
  background:linear-gradient(180deg,rgba(34,224,208,.16),rgba(12,110,104,.12));
  color:var(--mint);font:600 12px/1 var(--font-mono);letter-spacing:.18em;
  transition:background-color .22s,color .22s,border-color .22s;
}
.rail__cta:hover{background:var(--cyan);border-color:var(--mint);color:#04120F}
.status-badge{display:flex;flex-direction:column;align-items:center;gap:8px;color:var(--mist);font:500 10px/1.3 var(--font-mono);letter-spacing:.14em;text-align:center}
.status-badge__text{writing-mode:vertical-rl;text-orientation:upright}
.status-badge__dot{
  width:6px;height:6px;border-radius:50%;background:var(--cyan);
  animation:pulse 2.4s ease-in-out infinite;
}
.rail__top{
  display:flex;flex-direction:column;align-items:center;gap:3px;
  width:44px;padding:8px 0;border:1px solid var(--hair);border-radius:var(--radius);
  color:var(--mist);transition:color .2s,border-color .2s,background-color .2s;
}
.rail__top:hover{color:var(--cyan);border-color:var(--cyan-deep);background:rgba(34,224,208,.08)}
.rail__top-glyph{font-size:14px;line-height:1}
.rail__top-text{font:600 9px/1 var(--font-mono);letter-spacing:.14em}

.nav-scrim{
  position:fixed;top:var(--bar-h);left:0;right:0;bottom:0;z-index:77;
  background:rgba(4,7,11,.74);opacity:0;visibility:hidden;pointer-events:none;
  transition:opacity .25s ease,visibility .25s ease;
}
.nav-scrim[data-visible]{opacity:1;visibility:visible;pointer-events:auto}

/* ---------- 17 页脚 ---------- */
.site-footer{
  position:relative;z-index:2;
  margin-top:clamp(48px,8vw,110px);
  border-top:1px solid var(--hair);
  background:linear-gradient(180deg,#080D14,#06090F 42%);
}
.footer-cta{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:20px;
  padding:clamp(24px,4vw,46px) clamp(20px,5vw,64px);
  background:var(--paper);color:#0A0F16;
  clip-path:polygon(0 0,100% 0,100% 100%,26px 100%,0 calc(100% - 26px));
}
.footer-cta__kicker{font:600 11px/1 var(--font-mono);letter-spacing:.26em;text-transform:uppercase;color:var(--cyan-deep)}
.footer-cta__title{margin-top:10px;font-family:var(--font-display);font-weight:700;font-size:clamp(22px,3.4vw,34px);line-height:1.14;color:#06090F}
.footer-cta__note{margin-top:8px;font-size:13.5px;line-height:1.7;color:#3A4653;max-width:48ch}

.footer-grid{
  display:grid;grid-template-columns:minmax(220px,1.35fr) repeat(4,minmax(0,1fr));
  gap:clamp(20px,3vw,40px);
  padding:clamp(34px,5vw,62px) 0 clamp(24px,3vw,38px);
}
.footer-brand__name{font-family:var(--font-display);font-weight:700;font-size:22px;letter-spacing:.06em}
.footer-brand__sub{display:inline-block;margin-top:8px;font:600 10px/1 var(--font-mono);letter-spacing:.24em;color:var(--gold)}
.footer-brand__desc{margin-top:12px;max-width:34ch;font-size:13.5px;color:var(--mist)}
.footer-col__title{font:600 11px/1 var(--font-mono);letter-spacing:.18em;text-transform:uppercase;color:var(--cyan)}
.footer-col__list{margin-top:14px;display:flex;flex-direction:column;gap:9px}
.footer-col__list a{
  display:inline-block;font-size:13.5px;color:var(--mist);
  border-bottom:1px solid transparent;
  transition:color .2s,border-color .2s;
}
.footer-col__list a:hover{color:var(--mint);border-bottom-color:var(--cyan-deep)}

.footer-contact{
  display:grid;grid-template-columns:repeat(auto-fit,minmax(210px,1fr));gap:18px;
  padding:clamp(20px,3vw,30px);
  border:1px solid var(--hair);border-radius:var(--radius);
  background:linear-gradient(135deg,rgba(22,32,46,.9),rgba(14,22,34,.86));
}
.footer-contact__item{display:flex;flex-direction:column;gap:8px;align-items:flex-start}
.footer-contact__label{font:600 10px/1 var(--font-mono);letter-spacing:.2em;color:var(--mist)}
.footer-contact__value{font:500 14px/1.6 var(--font-mono);color:var(--text);word-break:break-all}
.footer-contact__note{grid-column:1/-1;font-size:13px;color:var(--mist);line-height:1.7;max-width:70ch}
.copy-status{grid-column:1/-1;min-height:18px;font:600 11px/1.6 var(--font-mono);letter-spacing:.08em;color:var(--mint)}
.copy-status:empty{display:none}

.footer-meta{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:10px 24px;
  margin-top:clamp(20px,3vw,32px);padding:18px 0 28px;
  border-top:1px solid var(--hair);
  color:var(--mist);font:400 12.5px/1.75 var(--font-mono);
}
.footer-meta__item{max-width:70ch}

/* ---------- 18 显现 ---------- */
.reveal[data-reveal="pending"]{opacity:0;transform:translateY(8px)}
.reveal{
  transition:opacity .55s var(--ease-out),transform .55s var(--ease-out);
}
.reveal.is-visible{opacity:1;transform:none}

/* ---------- 19 响应式 ---------- */
@media (max-width:1024px){
  .col-5,.col-7,.col-8{grid-column:span 12}
  .col-4{grid-column:span 6}
  .col-6{grid-column:span 12}
  .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .footer-brand{grid-column:1/-1}
}
@media (max-width:900px){
  :root{--rail-w:0px;--bar-h:56px}
  .site-header{
    top:0;left:0;right:0;bottom:auto;width:auto;height:var(--bar-h);
    flex-direction:row;align-items:center;justify-content:space-between;gap:10px;
    padding:0 12px;border-right:0;border-bottom:1px solid var(--hair);
    background:#080D14;
  }
  .brand{flex-direction:row;align-items:center;gap:10px;padding:0;border-bottom:0}
  .brand:hover{background:transparent}
  .brand:hover .brand__name{color:var(--cyan)}
  .brand__mark{width:32px;height:32px;font-size:12px}
  .brand__text{flex-direction:row;align-items:baseline;gap:7px}
  .brand__name,.brand__sub{writing-mode:horizontal-tb}
  .brand__name{font-size:15px;letter-spacing:.08em}
  .brand__sub{font-size:9px;letter-spacing:.2em}
  .mbar-now{display:flex;align-items:center;gap:6px;font:600 11px/1 var(--font-mono);letter-spacing:.1em;color:var(--mist)}
  .mbar-now__index{color:var(--gold)}
  .mbar-now__label{color:var(--text)}
  .nav-toggle{display:inline-flex}
  .rail{
    position:fixed;top:var(--bar-h);left:0;bottom:0;z-index:78;
    width:min(86vw,320px);padding:14px 12px 26px;
    background:linear-gradient(180deg,#0A121C,#06090F);
    border-right:1px solid var(--hair);
    box-shadow:0 0 40px rgba(0,0,0,.62);
    transform:translateX(-103%);
    transition:transform .3s var(--ease-out);
  }
  .rail[data-open]{transform:none}
  .rail__list{gap:4px}
  .rail__link{flex-direction:row;justify-content:flex-start;gap:12px;min-height:52px;padding:10px 14px;border:1px solid transparent}
  .rail__link:hover::before{transform:scaleY(1)}
  .rail__link[aria-current="page"]{border-color:rgba(34,224,208,.3)}
  .rail__link[aria-current="page"]::after{right:14px;top:50%;margin-top:-2px}
  .rail__index{font-size:12px}
  .rail__label{font-size:15px;letter-spacing:.06em}
  .rail__foot{flex-direction:row;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:12px;padding:16px 2px 0}
  .rail__cta{writing-mode:horizontal-tb;width:100%;padding:13px;letter-spacing:.14em}
  .status-badge{flex-direction:row;gap:8px}
  .status-badge__text{writing-mode:horizontal-tb}
  .rail__top{flex-direction:row;gap:6px;width:auto;padding:9px 12px}
  html[data-nav-open="true"]{overflow:hidden}
  .toc{position:static;border-left:0;border-top:1px solid var(--hair);padding:12px 0 0;flex-direction:row;flex-wrap:wrap;gap:14px}
  .page-head::after{width:70%;opacity:.7}
}
@media (max-width:640px){
  body{font-size:16px}
  .col-4{grid-column:span 12}
  .footer-grid{grid-template-columns:1fr;gap:26px}
  .footer-cta{clip-path:polygon(0 0,100% 0,100% 100%,18px 100%,0 calc(100% - 18px))}
  .dossier__row{grid-template-columns:1fr;gap:6px}
  .data-strip{grid-template-columns:repeat(auto-fit,minmax(132px,1fr))}
  .breadcrumb__list{font-size:10.5px}
  .footer-meta{flex-direction:column;align-items:flex-start}
}

/* ---------- 20 动效降级 ---------- */
@media (prefers-reduced-motion: reduce){
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
  }
  html{scroll-behavior:auto}
  .reveal,.reveal[data-reveal="pending"]{opacity:1;transform:none}
  .status-badge__dot,.chip--live::before{animation:none;opacity:1}
}