/* ============================================================
   7娱乐会馆 / 共享样式表  /assets/site.css
   夜间会馆 + 数据看板：深空蓝底、霓虹青描边、暖金强调、等宽索引
   ============================================================ */

/* ---------- 1. 变量 ---------- */
:root{
  --ink:#0A0E1F;
  --night:#101832;
  --cyan:#2FE3D2;
  --gold:#F2B347;
  --gold-light:#FFD98A;
  --violet:#6C6A8A;
  --violet-glow:#7A6BC4;
  --teal:#0E4F53;
  --mist:#E8ECF5;
  --silent:#9AA3BF;

  --line:rgba(108,106,138,.36);
  --line-soft:rgba(108,106,138,.18);
  --line-cyan:rgba(47,227,210,.34);

  --rail:88px;
  --header-h:68px;
  --shell:1240px;

  --font-display:"Noto Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  --font-body:"Noto Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  --font-mono:"JetBrains Mono",ui-monospace,SFMono-Regular,"SF Mono",Menlo,Consolas,"Liberation Mono",monospace;

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

/* ---------- 2. Reset ---------- */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body,h1,h2,h3,h4,h5,p,figure,blockquote,dl,dd{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
img,svg,video{display:block;max-width:100%}
a{color:inherit;text-decoration:none}
button,input,select,textarea{font:inherit;color:inherit}
button{background:none;border:0}
[hidden]{display:none!important}
[data-filter-item][hidden]{display:none!important}

/* ---------- 3. 基础排版 ---------- */
body{
  min-height:100vh;
  background:
    radial-gradient(1100px 620px at 84% -8%, rgba(47,227,210,.10), transparent 62%),
    radial-gradient(880px 520px at 2% 6%, rgba(122,107,196,.14), transparent 60%),
    var(--ink);
  color:var(--mist);
  font-family:var(--font-body);
  font-size:16px;
  font-weight:400;
  line-height:1.75;
  letter-spacing:.01em;
  overflow-x:hidden;
}
h1,h2,h3,h4{font-weight:800;letter-spacing:-.02em;line-height:1.2;color:var(--mist)}
h1{font-size:clamp(32px,5.2vw,56px)}
h2{font-size:clamp(24px,3.2vw,34px)}
h3{font-size:clamp(17px,2vw,22px);font-weight:700}
h4{font-size:17px;font-weight:700}
p{max-width:70ch}
strong{color:#fff;font-weight:700}
::selection{background:rgba(47,227,210,.28);color:#fff}
:focus-visible{outline:2px solid var(--cyan);outline-offset:3px;border-radius:2px}

.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0}

/* ---------- 4. 跳过链接 ---------- */
.skip-link{
  position:fixed;
  top:10px;left:10px;
  z-index:200;
  transform:translateY(-180%);
  padding:11px 18px;
  background:var(--gold);
  color:#20160A;
  border-radius:var(--radius);
  font:600 14px/1 var(--font-display);
  transition:transform .2s var(--ease);
}
.skip-link:focus{transform:translateY(0)}

/* ---------- 5. 头部：品牌轨道 + 顶栏 ---------- */
.site-header{position:relative;z-index:80}

/* 5.1 品牌轨道 */
.rail{
  position:fixed;
  top:0;left:0;bottom:0;
  width:var(--rail);
  z-index:72;
  display:flex;
  flex-direction:column;
  align-items:center;
  gap:18px;
  padding:18px 0 40px;
  background:linear-gradient(180deg,#0A0E1F 0%,#0D1226 52%,#0A0E1F 100%);
  border-right:1px solid var(--line);
}
.rail::after{
  content:"";
  position:absolute;
  top:0;right:-1px;bottom:0;
  width:1px;
  background:linear-gradient(180deg,transparent,rgba(47,227,210,.45) 22%,rgba(122,107,196,.35) 78%,transparent);
  pointer-events:none;
}
.rail__brand{
  display:flex;
  flex-direction:column;
  align-items:center;
  gap:12px;
  color:var(--mist);
}
.rail__mark{
  display:grid;
  place-items:center;
  width:44px;height:44px;
  border:1px solid var(--line-cyan);
  border-radius:var(--radius);
  background:linear-gradient(150deg,rgba(47,227,210,.16),rgba(122,107,196,.10));
  color:var(--cyan);
  font:700 15px/1 var(--font-mono);
  letter-spacing:.06em;
  box-shadow:inset 0 0 0 1px rgba(10,14,31,.55),0 0 18px rgba(47,227,210,.12);
  transition:width .22s var(--ease),height .22s var(--ease),font-size .22s var(--ease);
}
.rail__name{
  writing-mode:vertical-rl;
  font:600 13px/1 var(--font-display);
  letter-spacing:.34em;
  color:var(--silent);
  max-height:220px;
  overflow:hidden;
  transition:max-height .24s var(--ease),opacity .24s var(--ease);
}
.rail__brand:hover .rail__mark{border-color:var(--cyan);box-shadow:0 0 22px rgba(47,227,210,.28)}
.rail__brand:hover .rail__name{color:var(--mist)}

.rail__current{
  margin:auto 0 0;
  display:flex;
  flex-direction:column;
  align-items:center;
  gap:10px;
  text-align:center;
}
.rail__current-label{
  writing-mode:vertical-rl;
  font:500 10px/1 var(--font-mono);
  letter-spacing:.3em;
  color:var(--violet);
}
.rail__current-name{
  writing-mode:vertical-rl;
  font:600 13px/1 var(--font-display);
  letter-spacing:.22em;
  color:var(--cyan);
}

.rail__progress{
  position:relative;
  width:100%;
  height:96px;
  margin-top:10px;
}
.rail__progress::before{
  content:"";
  position:absolute;
  left:50%;top:0;bottom:0;
  width:1px;
  transform:translateX(-50%);
  background:var(--line);
}
.rail__progress-fill{
  position:absolute;
  left:50%;top:0;
  width:1px;height:0;
  transform:translateX(-50%);
  background:var(--cyan);
  box-shadow:0 0 10px rgba(47,227,210,.7);
  transition:height .12s linear;
}
.rail__progress-val{
  position:absolute;
  left:0;right:0;bottom:-22px;
  text-align:center;
  font:500 10px/1 var(--font-mono);
  letter-spacing:.08em;
  color:var(--silent);
}

/* 5.2 顶栏 */
.bar{
  position:fixed;
  top:0;left:var(--rail);right:0;
  height:var(--header-h);
  z-index:70;
  background:rgba(10,14,31,.84);
  -webkit-backdrop-filter:blur(14px) saturate(140%);
  backdrop-filter:blur(14px) saturate(140%);
  border-bottom:1px solid var(--line);
  transition:height .24s var(--ease),background .24s var(--ease);
}
.bar__inner{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:24px;
  height:100%;
  max-width:1440px;
  margin:0 auto;
  padding:0 clamp(18px,3vw,40px);
}
.bar__index{
  margin:0;
  display:inline-flex;
  align-items:center;
  gap:8px;
  font:500 12px/1 var(--font-mono);
  letter-spacing:.18em;
  text-transform:uppercase;
  color:var(--silent);
  white-space:nowrap;
}
.bar__index-num{color:var(--gold)}
.bar__index-sep{color:var(--violet)}

.site-nav{display:flex}
.site-nav__list{display:flex;align-items:center;gap:2px}
.site-nav__item{display:block}
.site-nav__link{
  position:relative;
  display:block;
  padding:10px 14px;
  border-radius:var(--radius);
  color:var(--silent);
  font:500 15px/1 var(--font-display);
  letter-spacing:.02em;
  transition:color .18s var(--ease),background .18s var(--ease);
}
.site-nav__link::after{
  content:"";
  position:absolute;
  left:14px;right:14px;bottom:5px;
  height:1px;
  background:var(--cyan);
  transform:scaleX(0);
  transform-origin:left;
  transition:transform .2s var(--ease);
}
.site-nav__link:hover{color:var(--mist)}
.site-nav__link:hover::after{transform:scaleX(1)}
.site-nav__link[aria-current="page"]{
  color:var(--cyan);
  background:rgba(47,227,210,.08);
  box-shadow:inset 0 0 0 1px rgba(47,227,210,.16);
}
.site-nav__link[aria-current="page"]::after{transform:scaleX(1)}

.nav-toggle{
  display:none;
  align-items:center;
  gap:10px;
  padding:10px 14px;
  border:1px solid var(--line);
  border-radius:var(--radius);
  color:var(--mist);
  font:500 13px/1 var(--font-mono);
  letter-spacing:.16em;
  cursor:pointer;
  transition:border-color .18s var(--ease),color .18s var(--ease);
}
.nav-toggle:hover{border-color:var(--line-cyan);color:var(--cyan)}
.nav-toggle__bars{display:grid;gap:4px;width:18px}
.nav-toggle__bars i{display:block;height:1px;background:currentColor;transition:transform .2s var(--ease),opacity .2s var(--ease)}
.nav-toggle[aria-expanded="true"]{border-color:var(--cyan);color:var(--cyan)}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars i:first-child{transform:translateY(5px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars i:nth-child(2){opacity:0}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars i:last-child{transform:translateY(-5px) rotate(-45deg)}

.bar__progress{
  position:absolute;
  left:0;right:0;bottom:-1px;
  height:2px;
  overflow:hidden;
  pointer-events:none;
}
.bar__progress-fill{
  display:block;
  width:0;height:100%;
  background:linear-gradient(90deg,var(--teal),var(--cyan));
  box-shadow:0 0 10px rgba(47,227,210,.55);
  transition:width .12s linear;
}

/* 5.3 滚动后的收束状态 */
.site-header[data-scrolled="true"] .bar{height:56px;background:rgba(10,14,31,.94)}
.site-header[data-scrolled="true"] .rail__mark{width:38px;height:38px;font-size:13px;border-color:var(--line)}
.site-header[data-scrolled="true"] .rail__name{max-height:0;opacity:0}
.site-header[data-scrolled="true"] .site-nav__link{padding:8px 11px;font-size:14px}
.site-header[data-scrolled="true"] .site-nav__link::after{left:11px;right:11px}

/* ---------- 6. 主内容容器 ---------- */
#main-content{
  position:relative;
  padding-top:calc(var(--header-h) + clamp(16px,3vw,40px));
  min-height:60vh;
}

/* ---------- 7. 页脚 ---------- */
.site-footer{
  position:relative;
  margin-top:clamp(64px,8vw,120px);
  padding:clamp(40px,5vw,72px) clamp(18px,3vw,40px) 0;
  background:linear-gradient(180deg,#0A0E1F 0%,#101832 42%,#0B1024 100%);
  border-top:1px solid var(--line);
  color:var(--silent);
}
.site-footer::before{
  content:"";
  position:absolute;
  top:-1px;left:0;right:0;
  height:1px;
  background:linear-gradient(90deg,transparent,rgba(47,227,210,.45),rgba(122,107,196,.35),transparent);
}
.footer__grid{
  display:grid;
  grid-template-columns:1.5fr 1fr 1fr 1.2fr;
  gap:clamp(24px,3vw,48px);
  max-width:var(--shell);
  margin:0 auto;
  padding-bottom:clamp(28px,4vw,48px);
}
.footer__col{min-width:0}
.footer__col--brand{max-width:34ch}
.footer__brand{
  display:inline-flex;
  align-items:center;
  gap:10px;
  color:var(--mist);
  font:800 19px/1.2 var(--font-display);
  letter-spacing:-.01em;
}
.footer__brand-mark{
  display:inline-grid;
  place-items:center;
  padding:4px 7px;
  border:1px solid var(--line-cyan);
  border-radius:2px;
  color:var(--cyan);
  font:600 11px/1 var(--font-mono);
  letter-spacing:.1em;
}
.footer__desc{
  margin-top:14px;
  font-size:15px;
  line-height:1.75;
  color:var(--silent);
}
.footer__badge{
  display:inline-block;
  margin-top:14px;
  padding:6px 11px;
  border:1px solid var(--line);
  border-radius:2px;
  background:rgba(14,79,83,.4);
  color:var(--gold-light);
  font:500 12px/1.5 var(--font-mono);
  letter-spacing:.08em;
}
.footer__title{
  margin-bottom:16px;
  font:600 12px/1 var(--font-mono);
  letter-spacing:.16em;
  text-transform:uppercase;
  color:var(--cyan);
}
.footer__list{display:grid;gap:10px}
.footer__link{
  position:relative;
  display:inline-block;
  font-size:15px;
  color:var(--silent);
  transition:color .18s var(--ease),transform .18s var(--ease);
}
.footer__link:hover{color:var(--mist);transform:translateX(3px)}
.footer__text{
  display:inline-block;
  font:500 13px/1.7 var(--font-mono);
  letter-spacing:.04em;
  color:var(--silent);
  word-break:break-all;
}
.footer__note{
  margin-top:14px;
  padding-top:12px;
  border-top:1px dashed var(--line);
  font-size:13px;
  line-height:1.7;
  color:var(--violet);
  max-width:32ch;
}
.footer__bottom{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:12px 22px;
  max-width:var(--shell);
  margin:0 auto;
  padding:20px 0 26px;
  border-top:1px solid var(--line-soft);
}
.footer__copy{
  margin:0;
  font:500 12px/1.6 var(--font-mono);
  letter-spacing:.08em;
  color:var(--silent);
}
.footer__legal{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px;
  margin:0;
  font:500 12px/1.6 var(--font-mono);
  letter-spacing:.08em;
  color:var(--violet);
}
.footer__sep{color:var(--violet-glow)}
.to-top{
  margin-left:auto;
  padding:9px 16px;
  border:1px solid var(--line);
  border-radius:var(--radius);
  color:var(--silent);
  font:500 12px/1 var(--font-mono);
  letter-spacing:.14em;
  cursor:pointer;
  opacity:0;
  visibility:hidden;
  transform:translateY(6px);
  transition:opacity .2s var(--ease),transform .2s var(--ease),visibility .2s var(--ease),border-color .2s var(--ease),color .2s var(--ease);
}
.to-top.is-on{opacity:1;visibility:visible;transform:translateY(0)}
.to-top:hover{border-color:var(--gold);color:var(--gold)}

/* ---------- 8. 通用布局零件 ---------- */
.shell{
  width:100%;
  max-width:var(--shell);
  margin:0 auto;
  padding:0 clamp(18px,3vw,40px);
}
.section{position:relative;padding:clamp(40px,5vw,88px) 0}
.section__head{
  display:flex;
  flex-wrap:wrap;
  align-items:flex-end;
  justify-content:space-between;
  gap:18px;
  margin-bottom:clamp(20px,3vw,36px);
}
.section__title{margin-top:14px}
.section__lead{
  margin-top:14px;
  font-size:16.5px;
  line-height:1.75;
  color:var(--silent);
}
.label{
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:5px 10px;
  border:1px solid var(--line-cyan);
  border-radius:2px;
  background:rgba(47,227,210,.06);
  color:var(--cyan);
  font:500 12px/1 var(--font-mono);
  letter-spacing:.12em;
  text-transform:uppercase;
}

.grid{display:grid;gap:clamp(18px,2.4vw,30px)}
.grid--2{grid-template-columns:repeat(2,minmax(0,1fr))}
.grid--3{grid-template-columns:repeat(3,minmax(0,1fr))}
.grid--aside{grid-template-columns:minmax(0,7fr) minmax(0,4fr)}
.grid--aside > :last-child{margin-top:clamp(0px,4vw,56px)}

/* ---------- 9. 组件：卡片 / 面板 ---------- */
.card{
  position:relative;
  padding:clamp(18px,2.4vw,26px);
  border:1px solid var(--line);
  border-radius:4px;
  background:linear-gradient(160deg,rgba(16,24,50,.94),rgba(10,14,31,.94));
  transition:border-color .2s var(--ease),transform .2s var(--ease);
}
.card:hover{border-color:var(--line-cyan);transform:translateY(-2px)}
.card__head{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:12px;
  margin-bottom:12px;
}
.card__title{margin-bottom:8px;font-size:19px;font-weight:700;letter-spacing:-.01em}
.card__text{font-size:15px;line-height:1.7;color:var(--silent);max-width:none}
.card__meta{font:500 12px/1 var(--font-mono);letter-spacing:.1em;color:var(--violet)}

.panel{
  padding:clamp(18px,2.4vw,28px);
  border:1px solid var(--line);
  border-radius:4px;
  background:var(--night);
}
.panel--teal{
  background:linear-gradient(150deg,rgba(14,79,83,.58),rgba(16,24,50,.94));
  border-color:rgba(47,227,210,.22);
}
.panel__title{
  margin-bottom:16px;
  font:700 13px/1 var(--font-mono);
  letter-spacing:.14em;
  text-transform:uppercase;
  color:var(--cyan);
}
.panel__row{
  display:flex;
  align-items:baseline;
  justify-content:space-between;
  gap:16px;
  padding:12px 0;
  border-bottom:1px dashed var(--line);
}
.panel__row:last-child{border-bottom:0;padding-bottom:0}

/* ---------- 10. 组件：数字 / 时间轴 / 标签 ---------- */
.stat{display:block}
.stat__num{font:700 clamp(28px,4vw,46px)/1 var(--font-mono);letter-spacing:-.02em;color:var(--cyan)}
.stat__unit{margin-left:6px;font:500 13px/1 var(--font-mono);color:var(--silent)}
.stat__label{display:block;margin-top:10px;font-size:14px;color:var(--silent)}

.timeline{position:relative;padding-left:28px}
.timeline::before{
  content:"";
  position:absolute;
  left:7px;top:6px;bottom:6px;
  width:1px;
  background:linear-gradient(180deg,var(--violet-glow),rgba(47,227,210,.4));
}
.timeline__item{position:relative;padding-bottom:26px}
.timeline__item:last-child{padding-bottom:0}
.timeline__dot{
  position:absolute;
  left:-28px;top:5px;
  width:15px;height:15px;
  border:1px solid var(--cyan);
  border-radius:50%;
  background:var(--ink);
  box-shadow:0 0 0 3px rgba(47,227,210,.10);
}
.timeline__time{
  display:block;
  margin-bottom:8px;
  font:500 12px/1 var(--font-mono);
  letter-spacing:.12em;
  color:var(--gold);
}
.timeline__body{font-size:15.5px;line-height:1.75;color:var(--silent);max-width:64ch}

.tag{
  display:inline-flex;
  align-items:center;
  padding:4px 9px;
  border:1px solid var(--line);
  border-radius:2px;
  background:rgba(108,106,138,.12);
  color:var(--silent);
  font:500 11px/1.5 var(--font-mono);
  letter-spacing:.1em;
}
.tag--cyan{color:var(--cyan);border-color:var(--line-cyan);background:rgba(47,227,210,.08)}
.tag--gold{color:var(--gold);border-color:rgba(242,179,71,.36);background:rgba(242,179,71,.10)}

/* ---------- 11. 组件：按钮 / 面包屑 / 筛选 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  padding:12px 22px;
  border:1px solid transparent;
  border-radius:var(--radius);
  font:600 15px/1 var(--font-display);
  letter-spacing:.02em;
  cursor:pointer;
  transition:transform .18s var(--ease),background .18s var(--ease),border-color .18s var(--ease),color .18s var(--ease);
}
.btn:hover{transform:translateY(-1px)}
.btn--gold{background:var(--gold);border-color:var(--gold);color:#20160A;box-shadow:0 6px 22px rgba(242,179,71,.22)}
.btn--gold:hover{background:var(--gold-light);border-color:var(--gold-light)}
.btn--cyan{background:transparent;border-color:var(--line-cyan);color:var(--cyan)}
.btn--cyan:hover{background:rgba(47,227,210,.10);border-color:var(--cyan)}
.btn--ghost{background:transparent;border-color:var(--line);color:var(--mist)}
.btn--ghost:hover{border-color:var(--violet);color:#fff}
.btn--block{width:100%}

.crumbs{margin:0 0 clamp(14px,2vw,22px)}
.crumbs__list{display:flex;flex-wrap:wrap;align-items:center;gap:8px}
.crumbs__item{
  display:inline-flex;
  align-items:center;
  font:500 12px/1 var(--font-mono);
  letter-spacing:.1em;
  color:var(--violet);
}
.crumbs__item::after{content:"/";margin-left:8px;color:var(--line)}
.crumbs__item:last-child::after{display:none}
.crumbs__item[aria-current="page"]{color:var(--cyan)}
.crumbs__link{color:var(--silent);transition:color .18s var(--ease)}
.crumbs__link:hover{color:var(--cyan)}

.filter-bar{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:10px;
  margin-bottom:clamp(20px,3vw,32px);
  padding:14px 0;
  border-top:1px solid var(--line);
  border-bottom:1px solid var(--line);
}
.filter-btn{
  padding:9px 16px;
  border:1px solid var(--line);
  border-radius:2px;
  color:var(--silent);
  font:500 13px/1 var(--font-mono);
  letter-spacing:.12em;
  cursor:pointer;
  transition:color .18s var(--ease),border-color .18s var(--ease),background .18s var(--ease);
}
.filter-btn:hover{border-color:var(--violet);color:var(--mist)}
.filter-btn.is-active,
.filter-btn[aria-pressed="true"]{background:var(--cyan);border-color:var(--cyan);color:#06231F}
.filter-count{margin-left:auto;font:500 12px/1 var(--font-mono);letter-spacing:.12em;color:var(--violet)}

/* ---------- 12. 图片容器基础规则 ---------- */
.media{
  position:relative;
  overflow:hidden;
  border:1px solid var(--line);
  border-radius:4px;
  background:linear-gradient(150deg,#101832,#0A0E1F);
}
.media__frame{position:relative;display:block;overflow:hidden}
.media__frame::after{
  content:"";
  position:absolute;
  inset:0;
  background:linear-gradient(150deg,rgba(47,227,210,.12),transparent 52%,rgba(122,107,196,.18));
  mix-blend-mode:screen;
  pointer-events:none;
}
.media img,
.media__frame img{
  display:block;
  width:100%;
  height:auto;
  aspect-ratio:16 / 9;
  object-fit:cover;
  filter:saturate(1.05) contrast(1.03);
}
.media--wide img{aspect-ratio:21 / 9}
.media--tall img{aspect-ratio:3 / 4}
.media__cap{
  display:block;
  padding:10px 14px;
  border-top:1px solid var(--line);
  font:500 12px/1.6 var(--font-mono);
  letter-spacing:.08em;
  color:var(--silent);
}

/* ---------- 13. 滚动显现协议 ---------- */
.js-ready [data-reveal]{
  opacity:0;
  transform:translateY(14px);
  transition:opacity .5s var(--ease),transform .5s var(--ease);
}
.js-ready [data-reveal].is-visible{opacity:1;transform:none}

/* ---------- 14. 响应式 ---------- */
@media (min-width:901px){
  #main-content{padding-left:var(--rail)}
  .site-footer{padding-left:calc(var(--rail) + clamp(18px,3vw,40px))}
}

@media (max-width:1100px){
  .footer__grid{grid-template-columns:1.4fr 1fr 1fr}
  .footer__col--brand{grid-column:1 / -1}
  .footer__col--brand{max-width:52ch}
  .grid--3{grid-template-columns:repeat(2,minmax(0,1fr))}
}

@media (max-width:900px){
  :root{--header-h:58px}

  .site-header{
    position:fixed;
    top:0;left:0;right:0;
    z-index:80;
    background:rgba(10,14,31,.94);
    -webkit-backdrop-filter:blur(14px);
    backdrop-filter:blur(14px);
    border-bottom:1px solid var(--line);
  }
  .rail{
    position:static;
    width:auto;
    height:58px;
    flex-direction:row;
    align-items:center;
    gap:12px;
    padding:0 16px;
    border-right:0;
    background:none;
  }
  .rail::after{display:none}
  .rail__brand{flex-direction:row;align-items:center;gap:10px}
  .rail__mark{width:34px;height:34px;font-size:12px;border-radius:2px}
  .rail__name{
    writing-mode:horizontal-tb;
    max-height:none;
    font-size:12px;
    letter-spacing:.2em;
    color:var(--mist);
  }
  .rail__current{
    flex-direction:row;
    align-items:center;
    gap:8px;
    margin:0 112px 0 auto;
  }
  .rail__current-label{writing-mode:horizontal-tb;font-size:10px;letter-spacing:.22em}
  .rail__current-name{writing-mode:horizontal-tb;font-size:12px;letter-spacing:.16em}
  .rail__progress{display:none}

  .bar{position:static;height:auto;background:none;border-bottom:0;-webkit-backdrop-filter:none;backdrop-filter:none}
  .bar__inner{display:block;height:auto;padding:0}
  .bar__index{display:none}
  .bar__progress{position:absolute;left:0;right:0;bottom:-1px;height:2px}

  .nav-toggle{display:inline-flex;position:absolute;top:11px;right:14px;padding:9px 12px;font-size:12px}
  .nav-toggle__text{letter-spacing:.14em}

  .js-ready .site-nav{
    position:absolute;
    top:58px;left:0;right:0;
    display:block;
    max-height:0;
    overflow:hidden;
    visibility:hidden;
    background:rgba(16,24,50,.98);
    border-top:1px solid var(--line);
    transition:max-height .26s var(--ease),visibility .26s var(--ease);
  }
  .js-ready .site-nav[data-open]{
    max-height:min(74vh,540px);
    overflow-y:auto;
    visibility:visible;
    border-bottom:1px solid var(--line-cyan);
  }
  .site-nav__list{flex-direction:column;align-items:stretch;gap:0;padding:6px 0}
  .site-nav__item{border-bottom:1px solid var(--line-soft)}
  .site-nav__item:last-child{border-bottom:0}
  .site-nav__link{padding:15px 20px;border-radius:0;font-size:16px}
  .site-nav__link::after{display:none}
  .site-nav__link[aria-current="page"]{box-shadow:inset 3px 0 0 var(--cyan)}

  #main-content{padding-left:0;padding-top:calc(var(--header-h) + 20px)}
  .site-footer{padding-left:clamp(18px,3vw,40px)}

  .footer__grid{grid-template-columns:1fr 1fr;gap:28px 22px}
  .footer__col--brand{grid-column:1 / -1}
  .footer__bottom{padding:18px 0 24px}
  .to-top{margin-left:0}

  .grid--2,
  .grid--3,
  .grid--aside{grid-template-columns:minmax(0,1fr)}
  .grid--aside > :last-child{margin-top:0}
}

@media (max-width:560px){
  body{font-size:15.5px}
  .footer__grid{grid-template-columns:1fr}
  .footer__legal{font-size:11px}
  .bar__progress{bottom:0}
  .rail__current{margin-right:104px}
  .filter-count{margin-left:0}
}

/* ---------- 15. 动效降级 ---------- */
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{
    animation-duration:.001ms!important;
    animation-iteration-count:1!important;
    transition-duration:.001ms!important;
  }
  .js-ready [data-reveal]{opacity:1;transform:none}
  .btn:hover,.card:hover,.footer__link:hover{transform:none}
}