/* ============================================================
   头头体育看台 · 共享站点样式 /assets/site.css
   高原看台夜赛：深蓝夜空底 · 荧光青绿数据 · 亮橙热度 · 看台暖红点缀
   ============================================================ */

:root{
  /* 色彩系统 */
  --night-900:#050A18;
  --night-800:#0A1226;
  --night-700:#101B36;
  --line-500:#1E2B4D;
  --mist-100:#EAF0FA;
  --mist-300:#A9B8D6;
  --teal-400:#22F0C0;
  --orange-400:#FF8A3C;
  --red-500:#E2415A;
  --violet-400:#7E6BFF;
  --paper-100:#F6F8FC;
  --paper-ink:#17203A;

  /* 尺度 */
  --bar-h:62px;
  --rail-w:236px;
  --strip-h:46px;
  --content-max:1200px;
  --gutter:clamp(16px,4vw,44px);
  --gap:clamp(14px,2vw,24px);
  --r-sm:8px;
  --r-md:14px;
  --r-lg:22px;

  /* 字体 */
  --f-head:"HarmonyOS Sans SC","MiSans","Noto Sans SC",system-ui,-apple-system,"PingFang SC","Microsoft YaHei",sans-serif;
  --f-body:"Noto Sans SC","PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",system-ui,sans-serif;
  --f-num:"JetBrains Mono","Roboto Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;

  /* 材质 */
  --sh-1:0 14px 30px -22px rgba(0,0,0,.95);
  --sh-2:0 28px 70px -36px rgba(0,0,0,1);
  --glow-teal:0 0 24px -6px rgba(34,240,192,.65);
  --ease:cubic-bezier(.22,.7,.24,1);
}

/* ---------- reset ---------- */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  padding-top:var(--bar-h);
  min-height:100vh;
  background-color:var(--night-900);
  background-image:
    radial-gradient(110% 70% at 84% -12%, rgba(34,240,192,.09), transparent 58%),
    radial-gradient(85% 55% at 6% 2%, rgba(126,107,255,.11), transparent 60%),
    linear-gradient(180deg, var(--night-900) 0%, #060C1C 100%);
  background-attachment:fixed;
  color:var(--mist-100);
  font-family:var(--f-body);
  font-size:16px;
  line-height:1.75;
  letter-spacing:.01em;
  overflow-x:hidden;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
img,svg,video{max-width:100%}
img{height:auto}
ul,ol{margin:0 0 1em;padding-left:1.2em}
li{margin:.25em 0}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit}
h1,h2,h3,h4,h5{font-family:var(--f-head);font-weight:800;line-height:1.2;letter-spacing:-.012em;margin:0 0 .5em;color:var(--mist-100)}
h1{font-size:clamp(34px,5.4vw,64px);font-weight:900}
h2{font-size:clamp(26px,3.2vw,40px)}
h3{font-size:clamp(18px,2vw,24px)}
p{margin:0 0 1em}
hr{border:0}
:focus-visible{outline:2px solid var(--teal-400);outline-offset:3px;border-radius:4px}
#main-content{scroll-margin-top:96px}

/* ---------- 通用排版工具 ---------- */
.display-1{font-family:var(--f-head);font-weight:900;font-size:clamp(38px,6.4vw,96px);line-height:1.03;letter-spacing:-.03em;margin:0 0 .35em}
.display-2{font-family:var(--f-head);font-weight:800;font-size:clamp(27px,3.4vw,40px);line-height:1.16;letter-spacing:-.02em;margin:0 0 .4em}
.display-3{font-family:var(--f-head);font-weight:700;font-size:clamp(19px,2.1vw,28px);line-height:1.3;margin:0 0 .4em}
.eyebrow{
  display:inline-flex;align-items:center;gap:10px;
  font-family:var(--f-num);font-size:12px;font-weight:500;letter-spacing:.2em;text-transform:uppercase;
  color:var(--teal-400);
}
.eyebrow::before{content:"";width:22px;height:1px;background:linear-gradient(90deg,transparent,var(--teal-400))}
.lede{font-size:clamp(16px,1.55vw,18px);line-height:1.8;color:var(--mist-300);max-width:64ch;margin:0 0 1em}
.num{font-family:var(--f-num);font-variant-numeric:tabular-nums;font-feature-settings:"tnum" 1;letter-spacing:-.02em}
.list-plain{list-style:none;margin:0;padding:0}
.divider{height:1px;border:0;margin:clamp(24px,3vw,42px) 0;background:linear-gradient(90deg,var(--line-500),rgba(30,43,77,0) 92%)}

/* ---------- 跳转链接 ---------- */
.skip-link{
  position:fixed;top:10px;left:10px;z-index:200;
  padding:10px 18px;border-radius:999px;
  background:var(--teal-400);color:#04121C;
  font-family:var(--f-head);font-weight:800;font-size:14px;
  box-shadow:var(--glow-teal);
  transform:translateY(-180%);
  transition:transform .22s var(--ease);
}
.skip-link:focus{transform:translateY(0)}

/* ---------- 头部：框架式导航 ---------- */
.site-header{position:relative;z-index:90}
.header-strip{display:none}

.header-rail{
  position:fixed;top:0;left:0;right:0;height:var(--bar-h);z-index:90;
  display:flex;align-items:center;gap:12px;
  padding:0 var(--gutter);
  background:linear-gradient(180deg,rgba(10,18,38,.97),rgba(5,10,24,.94));
  border-bottom:1px solid var(--line-500);
  -webkit-backdrop-filter:blur(14px);
  backdrop-filter:blur(14px);
}
.rail-head{display:flex;align-items:center;justify-content:space-between;gap:12px;width:100%;min-width:0}

.brand{display:inline-flex;align-items:center;gap:11px;min-width:0}
.brand__mark{
  flex:0 0 auto;width:34px;height:34px;border-radius:50%;
  background:conic-gradient(var(--teal-400) 0 58%, var(--line-500) 58% 100%);
  display:grid;place-items:center;
  box-shadow:0 0 0 1px rgba(30,43,77,.9), var(--glow-teal);
}
.brand__mark-core{
  width:22px;height:22px;border-radius:50%;
  background:radial-gradient(circle at 50% 40%, #16223F, var(--night-900));
  box-shadow:inset 0 0 0 1px rgba(30,43,77,.9);
}
.brand__text{display:flex;flex-direction:column;min-width:0}
.brand__name{
  font-family:var(--f-head);font-weight:900;font-size:17px;letter-spacing:.01em;
  color:var(--mist-100);line-height:1.25;white-space:nowrap;
}
.brand__line{
  font-size:11px;line-height:1.4;color:var(--mist-300);
  white-space:nowrap;overflow:hidden;text-overflow:ellipsis;max-width:46vw;
}
.brand:hover .brand__name{color:var(--teal-400)}

.nav-toggle{
  flex:0 0 auto;display:inline-flex;align-items:center;gap:8px;
  padding:9px 14px;border-radius:999px;
  border:1px solid var(--line-500);background:rgba(234,240,250,.04);
  color:var(--mist-100);cursor:pointer;
  font-family:var(--f-head);font-weight:700;font-size:13.5px;
  transition:border-color .18s var(--ease),color .18s var(--ease),background-color .18s var(--ease);
}
.nav-toggle__bars{
  position:relative;width:16px;height:10px;display:block;
}
.nav-toggle__bars::before,
.nav-toggle__bars::after{
  content:"";position:absolute;left:0;width:16px;height:2px;border-radius:2px;
  background:currentColor;transition:transform .22s var(--ease),top .22s var(--ease);
}
.nav-toggle__bars::before{top:0}
.nav-toggle__bars::after{top:8px}
.nav-toggle:hover{border-color:var(--teal-400);color:var(--teal-400);background:rgba(34,240,192,.08)}
.nav-toggle[aria-expanded="true"]{border-color:var(--teal-400);color:var(--teal-400)}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::before{top:4px;transform:rotate(45deg)}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::after{top:4px;transform:rotate(-45deg)}

.site-nav{
  position:fixed;top:var(--bar-h);left:0;right:0;z-index:88;
  display:none;flex-direction:column;gap:14px;
  max-height:calc(100vh - var(--bar-h));
  overflow-y:auto;
  padding:16px var(--gutter) 26px;
  background:linear-gradient(180deg,rgba(10,18,38,.995),rgba(5,10,24,.995));
  border-bottom:1px solid var(--line-500);
  box-shadow:var(--sh-2);
}
.site-nav[data-open]{display:flex;animation:nav-in .26s var(--ease) both}
@keyframes nav-in{from{opacity:0;transform:translateY(-10px)}to{opacity:1;transform:none}}

.site-nav__list{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:4px}
.site-nav__link{
  position:relative;display:flex;align-items:center;gap:11px;
  padding:11px 12px;border-radius:var(--r-sm);
  font-family:var(--f-head);font-weight:600;font-size:15px;color:var(--mist-300);
  transition:color .18s var(--ease),background-color .18s var(--ease);
}
.site-nav__link::before{
  content:"";width:3px;height:14px;border-radius:2px;background:var(--line-500);
  transition:height .2s var(--ease),background-color .2s var(--ease),box-shadow .2s var(--ease);
}
.site-nav__link:hover{color:var(--mist-100);background:rgba(34,240,192,.07)}
.site-nav__link:hover::before{height:20px;background:var(--orange-400)}
.site-nav__link[aria-current="page"]{
  color:var(--teal-400);
  background:linear-gradient(90deg,rgba(34,240,192,.16),rgba(34,240,192,0) 88%);
}
.site-nav__link[aria-current="page"]::before{
  height:22px;background:var(--teal-400);box-shadow:var(--glow-teal);
}

.site-nav__extra{
  margin-top:auto;display:flex;flex-direction:column;gap:10px;
  padding-top:14px;border-top:1px solid var(--line-500);
}
.site-nav__note{margin:0;font-size:12.5px;line-height:1.65;color:var(--mist-300)}
.site-nav__actions{display:flex;flex-wrap:wrap;gap:8px}
.site-nav__actions .btn{flex:1 1 100%}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:10px 16px;border:1px solid transparent;border-radius:999px;
  font-family:var(--f-head);font-weight:700;font-size:14px;line-height:1.2;letter-spacing:.02em;
  cursor:pointer;
  transition:transform .18s var(--ease),background-color .18s var(--ease),color .18s var(--ease),border-color .18s var(--ease),box-shadow .18s var(--ease);
}
.btn:hover{transform:translateY(-1px)}
.btn:active{transform:translateY(0)}
.btn--primary{background:var(--teal-400);color:#04121C}
.btn--primary:hover{background:#4BF6D0;color:#04121C;box-shadow:0 12px 34px -16px rgba(34,240,192,.95)}
.btn--ghost{background:rgba(234,240,250,.03);border-color:var(--line-500);color:var(--mist-100)}
.btn--ghost:hover{border-color:var(--teal-400);color:var(--teal-400);background:rgba(34,240,192,.09)}
.btn--quiet{background:rgba(255,138,60,.13);border-color:rgba(255,138,60,.34);color:var(--orange-400)}
.btn--quiet:hover{background:rgba(255,138,60,.22);color:#FFD2AE}

/* ---------- 状态小标签 ---------- */
.chip{
  display:inline-flex;align-items:center;gap:7px;
  padding:4px 11px;border-radius:999px;
  border:1px solid var(--line-500);background:rgba(234,240,250,.045);
  color:var(--mist-300);
  font-size:12px;font-weight:600;line-height:1.6;white-space:nowrap;
}
.chip__dot{
  width:6px;height:6px;border-radius:50%;background:var(--red-500);
  box-shadow:0 0 0 3px rgba(226,65,90,.18);
  animation:chip-pulse 2.4s ease-in-out infinite;
}
@keyframes chip-pulse{0%,100%{opacity:1}50%{opacity:.35}}
.chip--live{color:#FFB2C1;border-color:rgba(226,65,90,.46);background:rgba(226,65,90,.13)}
.chip--teal{color:var(--teal-400);border-color:rgba(34,240,192,.36);background:rgba(34,240,192,.09)}
.chip--warm{color:var(--orange-400);border-color:rgba(255,138,60,.36);background:rgba(255,138,60,.11)}

/* ---------- 页脚 ---------- */
.site-footer{
  position:relative;
  margin-top:clamp(48px,7vw,96px);
  border-top:1px solid var(--line-500);
  background:linear-gradient(180deg,rgba(10,18,38,.45) 0%,var(--night-800) 38%,#060B1A 100%);
}
.footer-seats{
  height:12px;
  background-image:repeating-linear-gradient(90deg,rgba(226,65,90,.55) 0 7px,rgba(30,43,77,0) 7px 16px);
  -webkit-mask-image:linear-gradient(90deg,transparent,#000 18%,#000 82%,transparent);
  mask-image:linear-gradient(90deg,transparent,#000 18%,#000 82%,transparent);
  opacity:.7;
}
.footer-main{
  width:100%;max-width:var(--content-max);margin-inline:auto;
  padding:clamp(34px,5vw,62px) var(--gutter) clamp(22px,3vw,38px);
  display:grid;grid-template-columns:1fr;gap:clamp(24px,3vw,40px);
}
.footer-brand{display:flex;flex-direction:column;gap:14px;align-items:flex-start}
.footer-brand__link{display:inline-flex;align-items:center;gap:10px}
.footer-brand__mark{
  width:26px;height:26px;border-radius:50%;
  background:conic-gradient(var(--teal-400) 0 62%, var(--line-500) 62% 100%);
  box-shadow:var(--glow-teal);
}
.footer-brand__name{font-family:var(--f-head);font-weight:900;font-size:20px;letter-spacing:-.01em}
.footer-brand__link:hover .footer-brand__name{color:var(--teal-400)}
.footer-brand__tagline{margin:0;font-size:14px;line-height:1.75;color:var(--mist-300);max-width:30ch}
.footer-brand__chips{list-style:none;margin:0;padding:0;display:flex;flex-wrap:wrap;gap:8px}

.footer-cols{display:grid;grid-template-columns:repeat(auto-fit,minmax(140px,1fr));gap:clamp(18px,3vw,32px)}
.footer-col{min-width:0}
.footer-col__title{
  margin:0 0 12px;font-family:var(--f-head);font-size:12.5px;font-weight:800;
  letter-spacing:.16em;color:var(--teal-400);
}
.footer-col__list{list-style:none;margin:0;padding:0;display:grid;gap:9px}
.footer-col__link{
  display:inline-block;font-size:14px;color:var(--mist-300);
  border-bottom:1px solid transparent;
  transition:color .18s var(--ease),border-color .18s var(--ease);
}
.footer-col__link:hover{color:var(--mist-100);border-bottom-color:var(--teal-400)}

.footer-contact{display:flex;flex-direction:column;gap:12px;min-width:0}
.footer-contact__title{
  margin:0;font-family:var(--f-head);font-size:12.5px;font-weight:800;
  letter-spacing:.16em;color:var(--orange-400);
}
.footer-contact__list{list-style:none;margin:0;padding:0;display:grid}
.footer-contact__item{
  display:grid;gap:2px;padding:10px 0;
  border-top:1px dashed rgba(30,43,77,.95);
}
.footer-contact__item:first-child{border-top:0;padding-top:0}
.footer-contact__label{font-size:11.5px;letter-spacing:.1em;color:var(--mist-300)}
.footer-contact__value{font-size:14.5px;color:var(--mist-100);word-break:break-word}
.footer-contact__note{margin:0;font-size:12.5px;line-height:1.7;color:var(--mist-300)}

.footer-bottom{
  border-top:1px solid var(--line-500);
  padding:16px max(var(--gutter),calc((100% - var(--content-max)) / 2)) 26px;
  display:flex;flex-wrap:wrap;gap:8px 22px;align-items:center;justify-content:space-between;
}
.footer-legal{margin:0;font-size:12.5px;color:var(--mist-300)}
.footer-meta{margin:0;font-size:12.5px;color:var(--mist-300)}

/* ---------- 内容骨架 ---------- */
.container{width:100%;max-width:var(--content-max);margin-inline:auto;padding-inline:var(--gutter)}
.section{padding-block:clamp(40px,6vw,88px)}
.section--tight{padding-block:clamp(22px,3.4vw,46px)}
.section--paper{
  background:var(--paper-100);color:var(--paper-ink);
  border-radius:var(--r-lg);
  padding:clamp(26px,4vw,56px);
  box-shadow:var(--sh-1);
}
.section--paper h1,.section--paper h2,.section--paper h3,.section--paper .display-2,.section--paper .display-3{color:var(--paper-ink)}
.section--paper .lede,.section--paper .section-head__lede{color:#3C4A6B}
.section-head{display:flex;flex-direction:column;gap:10px;margin-bottom:clamp(22px,3vw,40px);max-width:74ch}
.section-head__title{margin:0}
.section-head__lede{margin:0;font-size:16.5px;line-height:1.8;color:var(--mist-300)}

/* ---------- 面包屑 ---------- */
.breadcrumbs{padding-block:18px 0;font-size:13px}
.breadcrumbs__list{list-style:none;margin:0;padding:0;display:flex;flex-wrap:wrap;align-items:center;gap:9px}
.breadcrumbs__item{display:inline-flex;align-items:center;gap:9px;margin:0;color:var(--mist-300)}
.breadcrumbs__item + .breadcrumbs__item::before{content:"/";color:var(--line-500)}
.breadcrumbs__link{color:var(--mist-300);transition:color .18s var(--ease)}
.breadcrumbs__link:hover{color:var(--teal-400)}
.breadcrumbs [aria-current="page"]{color:var(--mist-100);font-weight:600}

/* ---------- Bento 网格 ---------- */
.bento{display:grid;grid-template-columns:repeat(6,minmax(0,1fr));gap:var(--gap)}
.bento__cell{grid-column:span 6;min-width:0}
.grid--auto{display:grid;gap:var(--gap);grid-template-columns:repeat(auto-fit,minmax(min(100%,260px),1fr))}

/* ---------- 数据面板 ---------- */
.panel{
  position:relative;overflow:hidden;
  padding:clamp(18px,2.2vw,26px);
  border:1px solid var(--line-500);border-radius:var(--r-md);
  background:linear-gradient(158deg,rgba(16,27,54,.94),rgba(10,18,38,.88));
  box-shadow:var(--sh-1);
}
.panel::after{
  content:"";position:absolute;inset:0;pointer-events:none;border-radius:inherit;
  background:radial-gradient(90% 60% at 100% 0%,rgba(34,240,192,.09),transparent 62%);
}
.panel--flush{padding:0}
.panel__head{display:flex;flex-wrap:wrap;align-items:baseline;justify-content:space-between;gap:8px 14px;margin-bottom:12px}
.panel__title{margin:0;font-size:17.5px}
.panel__meta{margin:0;font-family:var(--f-num);font-size:12px;letter-spacing:.08em;color:var(--mist-300)}

.stat-block{display:flex;flex-direction:column;gap:4px}
.stat-block__label{font-size:12.5px;letter-spacing:.1em;color:var(--mist-300)}
.stat-block__value{font-family:var(--f-num);font-weight:700;font-size:clamp(28px,3.4vw,46px);line-height:1;color:var(--teal-400)}
.stat-block__unit{font-size:.42em;margin-left:5px;color:var(--mist-300)}
.stat-block__delta{font-family:var(--f-num);font-size:12.5px;color:var(--orange-400)}

.pill{
  display:inline-flex;align-items:center;gap:7px;
  padding:5px 12px;border-radius:999px;
  border:1px solid var(--line-500);background:rgba(234,240,250,.04);
  font-size:12.5px;font-weight:600;color:var(--mist-300);
}
.pill--teal{color:var(--teal-400);border-color:rgba(34,240,192,.36);background:rgba(34,240,192,.09)}
.pill--warm{color:var(--orange-400);border-color:rgba(255,138,60,.36);background:rgba(255,138,60,.11)}
.pill--live{color:#FFB2C1;border-color:rgba(226,65,90,.46);background:rgba(226,65,90,.13)}
.pill--violet{color:#B6ACFF;border-color:rgba(126,107,255,.42);background:rgba(126,107,255,.13)}

.link-arrow{
  display:inline-flex;align-items:center;gap:8px;
  font-family:var(--f-head);font-weight:700;font-size:14.5px;color:var(--teal-400);
}
.link-arrow::after{content:"→";transition:transform .2s var(--ease)}
.link-arrow:hover::after{transform:translateX(4px)}

/* ---------- 图片容器（页面阶段放入 img） ---------- */
.media-frame{
  position:relative;overflow:hidden;
  border:1px solid var(--line-500);border-radius:var(--r-md);
  aspect-ratio:16 / 9;
  background:
    linear-gradient(140deg,var(--night-700) 0%,var(--night-900) 72%),
    linear-gradient(90deg,rgba(30,43,77,.6) 1px,transparent 1px) 0 0 / 46px 46px;
  box-shadow:var(--sh-1);
}
.media-frame::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background:
    linear-gradient(90deg,rgba(30,43,77,.5) 1px,transparent 1px) 0 0 / 52px 52px,
    linear-gradient(0deg,rgba(30,43,77,.5) 1px,transparent 1px) 0 0 / 52px 52px;
  opacity:.28;
}
.media-frame__img{display:block;width:100%;height:100%;object-fit:cover;position:relative;z-index:1}
.media-frame__caption{
  position:absolute;left:12px;bottom:12px;z-index:2;
  padding:5px 12px;border-radius:999px;
  background:rgba(5,10,24,.82);border:1px solid var(--line-500);
  font-size:12px;color:var(--mist-300);
}
.media-frame--wide{aspect-ratio:21 / 9}
.media-frame--tall{aspect-ratio:3 / 4}
.media-frame--square{aspect-ratio:1 / 1}

/* ---------- 长文阅读 ---------- */
.prose{max-width:68ch;font-size:16.5px;line-height:1.85;color:var(--mist-100)}
.prose p{margin:0 0 1.15em}
.prose h2{font-size:clamp(21px,2.4vw,28px);margin:1.7em 0 .55em}
.prose h3{font-size:19px;margin:1.5em 0 .5em}
.prose ul,.prose ol{padding-left:1.3em;margin:0 0 1.15em}
.prose li{margin:.32em 0}
.prose blockquote{
  margin:1.4em 0;padding:12px 18px;border-left:3px solid var(--teal-400);
  background:rgba(34,240,192,.07);border-radius:0 var(--r-sm) var(--r-sm) 0;color:var(--mist-300);
}
.prose a{color:var(--teal-400);border-bottom:1px solid rgba(34,240,192,.42)}
.prose--paper{color:var(--paper-ink)}
.prose--paper h2,.prose--paper h3{color:var(--paper-ink)}
.prose--paper a{color:#0E7C63;border-bottom-color:rgba(14,124,99,.4)}
.prose--paper blockquote{background:rgba(23,32,58,.06);border-left-color:#0E9E7C;color:#394764}

/* ---------- 折叠面板 ---------- */
.accordion{
  border:1px solid var(--line-500);border-radius:var(--r-md);
  background:rgba(16,27,54,.62);overflow:hidden;
}
.accordion + .accordion{margin-top:10px}
.accordion__title{
  list-style:none;cursor:pointer;
  padding:15px 18px;display:flex;align-items:center;justify-content:space-between;gap:12px;
  font-family:var(--f-head);font-weight:700;font-size:15.5px;color:var(--mist-100);
}
.accordion__title::-webkit-details-marker{display:none}
.accordion__title::after{
  content:"+";font-family:var(--f-num);font-size:19px;line-height:1;color:var(--teal-400);
  transition:transform .22s var(--ease);
}
.accordion[open] .accordion__title::after{transform:rotate(45deg)}
.accordion__body{padding:0 18px 18px;font-size:15px;line-height:1.8;color:var(--mist-300)}

/* ---------- 滚动显现 ---------- */
[data-reveal]{
  opacity:0;transform:translateY(16px);
  transition:opacity .62s var(--ease),transform .62s var(--ease);
}
[data-reveal].is-visible{opacity:1;transform:none}
html:not(.js-ready) [data-reveal]{opacity:1;transform:none}
html.is-nav-open{overflow:hidden}

/* ---------- 桌面：框架式左侧导航 + 顶部状态条 ---------- */
@media (min-width:760px){
  .bento{grid-template-columns:repeat(12,minmax(0,1fr))}
  .bento__cell{grid-column:span var(--span-md,6)}
  .footer-main{grid-template-columns:repeat(2,minmax(0,1fr))}
  .footer-brand{grid-column:1 / -1}
}

@media (min-width:1000px){
  body{padding-top:var(--strip-h);padding-left:var(--rail-w)}

  .header-rail{
    top:0;left:0;bottom:0;right:auto;
    width:var(--rail-w);height:auto;
    flex-direction:column;align-items:stretch;gap:24px;
    padding:22px 18px 24px;
    border-bottom:0;border-right:1px solid var(--line-500);
    background:linear-gradient(180deg,rgba(16,27,54,.95) 0%,rgba(5,10,24,.99) 62%);
  }
  .rail-head{flex-direction:column;align-items:flex-start;width:auto}
  .brand{width:100%}
  .brand__line{max-width:100%}
  .nav-toggle{display:none}

  .header-strip{
    display:flex;position:fixed;top:0;left:var(--rail-w);right:0;z-index:70;
    height:var(--strip-h);
    align-items:center;justify-content:space-between;gap:18px;
    padding:0 var(--gutter);
    border-bottom:1px solid var(--line-500);
    background:rgba(5,10,24,.86);
    -webkit-backdrop-filter:blur(10px);
    backdrop-filter:blur(10px);
  }
  .header-strip__line{margin:0;font-size:12.5px;color:var(--mist-300);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
  .header-strip__chips{list-style:none;margin:0;padding:0;display:flex;align-items:center;gap:8px;flex:0 0 auto}

  .site-nav{
    position:static;display:flex;flex:1 1 auto;min-height:0;max-height:none;
    overflow-y:auto;padding:0;border:0;box-shadow:none;background:none;animation:none;gap:18px;
  }
  .site-nav__extra{position:sticky;bottom:0;background:linear-gradient(180deg,rgba(5,10,24,0),rgba(5,10,24,.96) 42%)}

  .bento__cell{grid-column:span var(--span-lg,var(--span-md,6))}
  .footer-main{grid-template-columns:1.05fr 1.85fr 1.2fr;align-items:start}
  .footer-brand{grid-column:auto}
}

@media (min-width:1240px){
  :root{--rail-w:252px}
}

/* ---------- 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;
  }
  [data-reveal]{opacity:1 !important;transform:none !important}
  .btn:hover{transform:none}
}