/* ==========================================================================
   星空体育入口 · 共享样式 /assets/site.css
   深空蓝底 + 星云紫背板，荧光青与暖橙作数据高亮；锐利直角、1px 细线、等宽索引
   ========================================================================== */

/* ---------- 1. 设计变量 ---------- */
:root{
  --ink:#060814;
  --space:#0B1026;
  --nebula:#3B2A6B;
  --paper:#F3EDE2;
  --paper-ink:#141A2E;
  --dust:#A7B0C9;
  --cyan:#37E6D2;
  --amber:#FF8A3D;
  --volt:#5B8CFF;
  --gold:#F5C24B;
  --red:#E4483B;
  --volt-ink:#2440B8;

  --line:rgba(167,176,201,.20);
  --line-strong:rgba(167,176,201,.38);
  --line-paper:rgba(20,26,46,.16);
  --glass:rgba(6,8,20,.62);

  --font-display:"Archivo Black","Source Han Sans SC","Noto Sans SC","PingFang SC","Microsoft YaHei",system-ui,sans-serif;
  --font-body:"Source Han Sans SC","Noto Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  --font-mono:"JetBrains Mono","IBM Plex Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;

  --fs-12:.75rem;
  --fs-14:.875rem;
  --fs-16:1rem;
  --fs-20:1.25rem;
  --fs-28:1.75rem;
  --fs-44:2.75rem;
  --fs-72:4.5rem;

  --frame:1240px;
  --pad-x:clamp(16px,4vw,48px);
  --gap:clamp(14px,2vw,28px);
  --sec-y:clamp(48px,7vw,104px);
  --ease:cubic-bezier(.22,.61,.36,1);
  --r-pill:999px;
  --r-cut:2px;
}

/* ---------- 2. 重置与中文排版 ---------- */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
@media (prefers-reduced-motion:no-preference){
  html{scroll-behavior:smooth}
}
body,h1,h2,h3,h4,p,ul,ol,li,figure,blockquote,dl,dd{margin:0}
ul,ol{padding:0;list-style:none}
img,svg{max-width:100%;display:block}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
a{color:inherit;text-decoration:none}
table{border-collapse:collapse}
:focus-visible{outline:2px solid var(--cyan);outline-offset:3px}

body{
  min-height:100vh;
  background-color:var(--space);
  color:var(--paper);
  font-family:var(--font-body);
  font-size:var(--fs-16);
  line-height:1.7;
  letter-spacing:.01em;
  overflow-x:hidden;
}
body::before{
  content:"";
  position:fixed;
  inset:0;
  z-index:-2;
  pointer-events:none;
  background:
    radial-gradient(120% 82% at 10% -12%, rgba(59,42,107,.78), transparent 62%),
    radial-gradient(78% 58% at 90% 4%, rgba(55,230,210,.10), transparent 64%),
    radial-gradient(72% 62% at 72% 104%, rgba(255,138,61,.10), transparent 66%),
    linear-gradient(180deg,#0B1026 0%,#080C1E 56%,#060814 100%);
}
body::after{
  content:"";
  position:fixed;
  inset:0;
  z-index:-1;
  pointer-events:none;
  opacity:.6;
  background-image:
    radial-gradient(circle, rgba(243,237,226,.5) 0 1px, transparent 1.4px),
    radial-gradient(circle, rgba(167,176,201,.32) 0 1px, transparent 1.4px),
    linear-gradient(to right, rgba(167,176,201,.05) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(167,176,201,.05) 1px, transparent 1px);
  background-size:196px 196px, 328px 328px, 64px 64px, 64px 64px;
  background-position:0 0, 92px 128px, 0 0, 0 0;
}

/* ---------- 3. 字号阶梯 ---------- */
.t-hero{
  font-family:var(--font-display);
  font-weight:900;
  font-size:clamp(2.1rem,5.6vw,4.5rem);
  line-height:1.02;
  letter-spacing:-.02em;
}
.t-h1{
  font-family:var(--font-display);
  font-weight:900;
  font-size:clamp(1.75rem,3.4vw,2.75rem);
  line-height:1.1;
  letter-spacing:-.015em;
}
.t-h2{
  font-family:var(--font-display);
  font-weight:800;
  font-size:clamp(1.3rem,2.3vw,1.75rem);
  line-height:1.22;
  letter-spacing:-.01em;
}
.t-h3{font-size:var(--fs-20);font-weight:700;line-height:1.35}
.t-eyebrow{
  font-family:var(--font-mono);
  font-size:var(--fs-12);
  letter-spacing:.14em;
  text-transform:uppercase;
  color:var(--cyan);
}
.t-lede{
  font-size:clamp(1rem,1.45vw,1.125rem);
  line-height:1.75;
  color:var(--dust);
  max-width:42ch;
}
.t-mono{font-family:var(--font-mono);font-variant-numeric:tabular-nums}

/* ---------- 4. 容器、画布与网格 ---------- */
.wrap{width:100%;max-width:var(--frame);margin-inline:auto;padding-inline:var(--pad-x)}
.wrap--narrow{max-width:760px}
.wrap--wide{max-width:1440px}

.section{position:relative;padding-block:var(--sec-y)}
.section--tight{padding-block:clamp(32px,4vw,56px)}
.section--paper{
  background:var(--paper);
  color:var(--paper-ink);
  border-block:1px solid var(--line-paper);
}
.section--paper .t-lede{color:#4A5169}
.section--paper .t-eyebrow{color:#8A5A12}
.section--ink{background:var(--ink)}
.section--nebula{
  background:
    linear-gradient(150deg, rgba(59,42,107,.62), rgba(11,16,38,.86) 62%),
    var(--space);
  border-block:1px solid var(--line);
}

.section-head{
  display:grid;
  gap:.7rem;
  padding-bottom:1rem;
  margin-bottom:clamp(20px,3vw,36px);
  border-bottom:1px solid var(--line);
}
.section-head--split{
  grid-template-columns:1fr auto;
  align-items:end;
}
.section-head__idx{
  font-family:var(--font-mono);
  font-size:var(--fs-12);
  letter-spacing:.14em;
  text-transform:uppercase;
  color:var(--amber);
}
.section-head__note{
  font-family:var(--font-mono);
  font-size:var(--fs-12);
  letter-spacing:.08em;
  color:var(--dust);
}
.section--paper .section-head{border-bottom-color:var(--line-paper)}
.section--paper .section-head__note{color:#6A7190}

.hairline{height:1px;border:0;background:var(--line)}
.rule{height:1px;background:var(--line);border:0;margin:0}

.bento{
  display:grid;
  grid-template-columns:repeat(12,minmax(0,1fr));
  gap:var(--gap);
}
.span-3{grid-column:span 3}
.span-4{grid-column:span 4}
.span-5{grid-column:span 5}
.span-6{grid-column:span 6}
.span-7{grid-column:span 7}
.span-8{grid-column:span 8}
.span-9{grid-column:span 9}
.span-12{grid-column:span 12}

.stack{display:grid;gap:var(--gap)}
.stack--sm{display:grid;gap:.7rem}

/* ---------- 5. 按钮、标签、状态点 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:.5em;
  padding:.72em 1.35em;
  font-size:var(--fs-14);
  font-weight:600;
  letter-spacing:.02em;
  line-height:1.2;
  border:1px solid transparent;
  border-radius:var(--r-cut);
  white-space:nowrap;
  transition:background-color .2s var(--ease),color .2s var(--ease),border-color .2s var(--ease),transform .2s var(--ease);
}
.btn:hover{transform:translateY(-1px)}
.btn--primary{background:var(--amber);color:#1A0C03}
.btn--primary:hover{background:#FFA467}
.btn--cyan{background:var(--cyan);color:#04211F}
.btn--cyan:hover{background:#6BF0E1}
.btn--ghost{border-color:var(--line-strong);color:var(--paper)}
.btn--ghost:hover{border-color:var(--cyan);color:var(--cyan)}
.btn--dark{background:var(--ink);color:var(--paper);border-color:var(--line)}
.btn--dark:hover{border-color:var(--cyan);color:var(--cyan)}
.btn--sm{padding:.5em .95em;font-size:.8125rem}
.btn--block{width:100%}
.section--paper .btn--ghost{border-color:var(--line-paper);color:var(--paper-ink)}
.section--paper .btn--ghost:hover{border-color:var(--volt-ink);color:var(--volt-ink)}

.tag{
  display:inline-flex;
  align-items:center;
  gap:.4em;
  padding:.32em .6em;
  border:1px solid currentColor;
  border-radius:var(--r-cut);
  font-family:var(--font-mono);
  font-size:var(--fs-12);
  letter-spacing:.08em;
  line-height:1;
  text-transform:uppercase;
}
.tag--cyan{color:var(--cyan)}
.tag--amber{color:var(--amber)}
.tag--gold{color:var(--gold)}
.tag--red{color:var(--red)}
.tag--volt{color:var(--volt)}
.tag--dust{color:var(--dust)}
.tag--solid{background:rgba(55,230,210,.14);border-color:transparent;color:var(--cyan)}

.dot{
  width:8px;height:8px;
  flex:none;
  background:var(--amber);
  border-radius:50%;
  box-shadow:0 0 0 3px rgba(255,138,61,.18);
}
@media (prefers-reduced-motion:no-preference){
  .dot--live{animation:dotPulse 2.2s var(--ease) infinite}
  @keyframes dotPulse{
    0%,100%{box-shadow:0 0 0 3px rgba(255,138,61,.18)}
    50%{box-shadow:0 0 0 7px rgba(255,138,61,.06)}
  }
}

/* ---------- 6. 面板、数据与表格 ---------- */
.panel{
  position:relative;
  padding:clamp(18px,2.2vw,28px);
  background:linear-gradient(155deg, rgba(59,42,107,.45), rgba(11,16,38,.72));
  border:1px solid var(--line);
}
.panel--ink{background:rgba(6,8,20,.62)}
.panel--paper{background:var(--paper);color:var(--paper-ink);border-color:var(--line-paper)}
.panel--tick::before,
.panel--tick::after{
  content:"";
  position:absolute;
  width:12px;height:12px;
  border:1px solid var(--cyan);
  pointer-events:none;
}
.panel--tick::before{top:-1px;left:-1px;border-right:0;border-bottom:0}
.panel--tick::after{bottom:-1px;right:-1px;border-left:0;border-top:0}
.panel__head{
  display:flex;
  align-items:baseline;
  justify-content:space-between;
  gap:1rem;
  padding-bottom:.8rem;
  margin-bottom:1rem;
  border-bottom:1px solid var(--line);
}
.panel--paper .panel__head{border-bottom-color:var(--line-paper)}
.panel__title{
  font-family:var(--font-mono);
  font-size:var(--fs-12);
  letter-spacing:.12em;
  text-transform:uppercase;
  color:var(--cyan);
}
.panel--paper .panel__title{color:var(--volt-ink)}

.stat-grid{
  display:grid;
  grid-template-columns:repeat(auto-fit,minmax(140px,1fr));
  gap:1px;
  background:var(--line);
  border:1px solid var(--line);
}
.stat{
  display:grid;
  gap:.2rem;
  padding:1rem 1.1rem;
  background:rgba(6,8,20,.68);
}
.stat__value{
  font-family:var(--font-mono);
  font-size:var(--fs-28);
  font-weight:600;
  line-height:1.1;
  color:var(--paper);
  font-variant-numeric:tabular-nums;
}
.stat__unit{font-size:.55em;color:var(--cyan);margin-left:.15em}
.stat__label{
  font-family:var(--font-mono);
  font-size:var(--fs-12);
  letter-spacing:.1em;
  text-transform:uppercase;
  color:var(--dust);
}

.table{
  width:100%;
  font-size:var(--fs-14);
  text-align:left;
}
.table th{
  padding:.7em .8em;
  font-family:var(--font-mono);
  font-size:var(--fs-12);
  font-weight:500;
  letter-spacing:.08em;
  text-transform:uppercase;
  color:var(--dust);
  border-bottom:1px solid var(--line-strong);
  white-space:nowrap;
}
.table td{
  padding:.7em .8em;
  border-bottom:1px solid var(--line);
  vertical-align:middle;
}
.table .num{
  font-family:var(--font-mono);
  font-variant-numeric:tabular-nums;
  text-align:right;
}
.table tbody tr:hover{background:rgba(55,230,210,.06)}
.table--paper th{color:#5A6180;border-bottom-color:var(--line-paper)}
.table--paper td{border-bottom-color:var(--line-paper)}
.table--paper tbody tr:hover{background:rgba(36,64,184,.06)}

/* ---------- 7. 标签页（可访问切换） ---------- */
.tablist{
  display:inline-flex;
  flex-wrap:wrap;
  gap:2px;
  padding:3px;
  background:rgba(6,8,20,.6);
  border:1px solid var(--line);
  border-radius:var(--r-pill);
}
.tab{
  padding:.5em 1em;
  border-radius:var(--r-pill);
  font-family:var(--font-mono);
  font-size:var(--fs-12);
  letter-spacing:.08em;
  color:var(--dust);
  transition:background-color .2s var(--ease),color .2s var(--ease);
}
.tab:hover{color:var(--paper)}
.tab[aria-selected="true"]{background:var(--cyan);color:#04211F}
.tabpanel{margin-top:clamp(16px,2vw,28px)}
.tabpanel[hidden]{display:none}

/* ---------- 8. 正文阅读画布与面包屑 ---------- */
.prose{
  max-width:44rem;
  font-size:1.0625rem;
  line-height:1.85;
}
.prose h2{
  font-family:var(--font-display);
  font-size:var(--fs-28);
  line-height:1.25;
  letter-spacing:-.01em;
  margin:2.1em 0 .7em;
}
.prose h3{
  font-size:var(--fs-20);
  font-weight:700;
  line-height:1.4;
  margin:1.7em 0 .6em;
}
.prose p{margin-bottom:1.15em}
.prose p:last-child{margin-bottom:0}
.prose ul,.prose ol{display:grid;gap:.5em;margin:0 0 1.3em;padding-left:1.1em}
.prose ol{list-style:decimal}
.prose ul li{position:relative;padding-left:1em}
.prose ul li::before{
  content:"";
  position:absolute;
  left:0;top:.8em;
  width:6px;height:1px;
  background:var(--red);
}
.prose a{color:var(--volt-ink);text-decoration:underline;text-underline-offset:3px}
.prose strong{font-weight:700}
.prose code{
  font-family:var(--font-mono);
  font-size:.9em;
  padding:.1em .35em;
  background:rgba(20,26,46,.07);
}

.breadcrumbs{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:.55em;
  font-family:var(--font-mono);
  font-size:var(--fs-12);
  letter-spacing:.08em;
  color:var(--dust);
}
.breadcrumbs__sep{color:rgba(167,176,201,.45)}
.breadcrumbs a:hover{color:var(--cyan)}
.breadcrumbs [aria-current="page"]{color:var(--paper)}
.section--paper .breadcrumbs{color:#6A7190}
.section--paper .breadcrumbs [aria-current="page"]{color:var(--paper-ink)}
.section--paper .breadcrumbs a:hover{color:var(--volt-ink)}

/* ---------- 9. 图片容器（供页面阶段放图） ---------- */
.figure{
  position:relative;
  display:block;
  overflow:hidden;
  background:linear-gradient(140deg, rgba(59,42,107,.62), rgba(6,8,20,.92));
  border:1px solid var(--line);
}
.figure img{
  width:100%;
  height:100%;
  object-fit:cover;
}
.figure > .figure__body{
  position:absolute;
  inset:0;
  display:flex;
  align-items:flex-end;
  padding:clamp(14px,2vw,22px);
}
.figure--21x9{aspect-ratio:21/9}
.figure--16x9{aspect-ratio:16/9}
.figure--1x1{aspect-ratio:1/1}
.figure--4x5{aspect-ratio:4/5}
.figure--3x4{aspect-ratio:3/4}
.figure--cut{clip-path:polygon(0 0,100% 0,100% 78%,0 100%)}
.figure__label{
  font-family:var(--font-mono);
  font-size:var(--fs-12);
  letter-spacing:.1em;
  text-transform:uppercase;
  color:var(--cyan);
}
.figure__cap{
  margin-top:.6rem;
  font-size:var(--fs-12);
  color:var(--dust);
}
.figure + .figure__cap{margin-top:.6rem}

/* ---------- 10. 头部：悬浮胶囊导航 ---------- */
.skip-link{
  position:fixed;
  left:16px;
  top:-120px;
  z-index:200;
  padding:.7em 1.1em;
  background:var(--cyan);
  color:#04211F;
  font-family:var(--font-mono);
  font-size:var(--fs-12);
  letter-spacing:.08em;
  transition:top .2s var(--ease);
}
.skip-link:focus{top:12px}

.site-header{
  position:sticky;
  top:0;
  z-index:80;
  padding:18px var(--pad-x) 0;
  border-bottom:1px solid transparent;
  transition:padding .28s var(--ease),background-color .28s var(--ease),border-color .28s var(--ease);
}
.site-header[data-scrolled]{
  padding-top:10px;
  padding-bottom:10px;
  background:rgba(6,8,20,.93);
  border-bottom-color:var(--line);
}
@supports (backdrop-filter:blur(12px)){
  .site-header[data-scrolled]{backdrop-filter:blur(12px)}
}

.header-frame{
  display:grid;
  grid-template-columns:auto 1fr auto;
  align-items:center;
  gap:clamp(10px,2vw,26px);
  width:100%;
  max-width:var(--frame);
  margin-inline:auto;
}

.brand{
  display:inline-flex;
  align-items:center;
  gap:.7rem;
  min-width:0;
}
.brand__orbit{
  position:relative;
  display:grid;
  place-items:center;
  width:34px;
  height:34px;
  flex:none;
}
.brand__ring{
  position:absolute;
  inset:0;
  border:1px solid var(--cyan);
  border-right-color:transparent;
  border-bottom-color:rgba(55,230,210,.3);
  border-radius:50%;
  transform:rotate(-28deg);
}
.brand__star{
  width:9px;
  height:9px;
  background:var(--amber);
  transform:rotate(45deg);
}
.brand__text{
  display:flex;
  flex-direction:column;
  line-height:1.05;
  min-width:0;
}
.brand__name{
  font-family:var(--font-display);
  font-size:1.0625rem;
  font-weight:900;
  letter-spacing:.02em;
  color:var(--paper);
}
.brand__meta{
  font-family:var(--font-mono);
  font-size:.625rem;
  letter-spacing:.14em;
  text-transform:uppercase;
  color:var(--cyan);
}
.brand--footer .brand__orbit{width:40px;height:40px}
.brand--footer .brand__name{font-size:1.2rem}

.nav-capsule{
  justify-self:center;
  padding:5px;
  background:rgba(6,8,20,.55);
  border:1px solid var(--line);
  border-radius:var(--r-pill);
}
@supports (backdrop-filter:blur(10px)){
  .nav-capsule{backdrop-filter:blur(10px)}
}
.nav-capsule__list{
  display:flex;
  align-items:center;
  gap:2px;
}
.nav-link{
  position:relative;
  display:inline-flex;
  align-items:center;
  padding:.5rem .95rem;
  border-radius:var(--r-pill);
  font-size:var(--fs-14);
  font-weight:500;
  color:var(--dust);
  white-space:nowrap;
  transition:color .2s var(--ease),background-color .2s var(--ease);
}
.nav-link:hover{color:var(--paper);background:rgba(55,230,210,.08)}
.nav-link[aria-current="page"]{
  color:var(--paper);
  background:rgba(55,230,210,.14);
  box-shadow:inset 0 0 0 1px rgba(55,230,210,.4);
}

.header-tools{
  justify-self:end;
  display:flex;
  align-items:center;
  gap:.55rem;
}
.tool-button{
  display:inline-flex;
  align-items:center;
  gap:.45rem;
  height:34px;
  padding:0 .75rem;
  border:1px solid var(--line);
  border-radius:var(--r-pill);
  font-family:var(--font-mono);
  font-size:.6875rem;
  letter-spacing:.08em;
  color:var(--dust);
  transition:color .2s var(--ease),border-color .2s var(--ease);
}
.tool-button:hover,
.tool-button[aria-expanded="true"]{color:var(--cyan);border-color:rgba(55,230,210,.5)}
.tool-button__icon{
  position:relative;
  width:11px;
  height:11px;
  border:1.5px solid currentColor;
  border-radius:50%;
  flex:none;
}
.tool-button__icon::after{
  content:"";
  position:absolute;
  right:-4px;
  bottom:-3px;
  width:6px;
  height:1.5px;
  background:currentColor;
  transform:rotate(45deg);
}
.tz-chip{
  display:inline-flex;
  align-items:center;
  gap:.45rem;
  height:34px;
  padding:0 .75rem;
  border:1px solid var(--line);
  border-radius:var(--r-pill);
  font-family:var(--font-mono);
  font-size:.6875rem;
  letter-spacing:.08em;
  color:var(--dust);
}
.tz-chip__value{color:var(--cyan);font-variant-numeric:tabular-nums}
.header-cta{height:34px;padding:0 1.05rem}

.nav-toggle{
  display:none;
  align-items:center;
  gap:.5rem;
  height:36px;
  padding:0 .85rem;
  border:1px solid var(--line-strong);
  border-radius:var(--r-pill);
  font-family:var(--font-mono);
  font-size:.6875rem;
  letter-spacing:.1em;
  color:var(--paper);
}
.nav-toggle__bars{
  position:relative;
  display:block;
  width:16px;
  height:10px;
  flex:none;
}
.nav-toggle__bars::before,
.nav-toggle__bars::after{
  content:"";
  position:absolute;
  left:0;
  width:16px;
  height:1.5px;
  background:currentColor;
  transition:transform .25s var(--ease),top .25s var(--ease);
}
.nav-toggle__bars::before{top:0}
.nav-toggle__bars::after{top:8px}
.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)}

.jump-panel{
  display:grid;
  gap:.75rem;
  width:100%;
  max-width:var(--frame);
  margin:12px auto 0;
  padding:clamp(16px,2vw,24px);
  background:rgba(6,8,20,.96);
  border:1px solid var(--line-strong);
  box-shadow:0 24px 60px rgba(0,0,0,.5);
}
.jump-panel[hidden]{display:none}
.jump-panel__head{
  display:flex;
  flex-wrap:wrap;
  align-items:baseline;
  justify-content:space-between;
  gap:.75rem;
  padding-bottom:.7rem;
  border-bottom:1px solid var(--line);
}
.jump-panel__title{
  font-family:var(--font-mono);
  font-size:var(--fs-12);
  letter-spacing:.14em;
  text-transform:uppercase;
  color:var(--cyan);
}
.jump-panel__hint{font-size:var(--fs-12);color:var(--dust)}
.jump-panel__list{
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  gap:2px;
}
.jump-link{
  display:flex;
  align-items:baseline;
  gap:.6rem;
  padding:.6rem .7rem;
  border:1px solid transparent;
  transition:background-color .2s var(--ease),border-color .2s var(--ease);
}
.jump-link:hover{background:rgba(55,230,210,.07);border-color:rgba(55,230,210,.35)}
.jump-link__idx{
  font-family:var(--font-mono);
  font-size:.6875rem;
  color:var(--amber);
}
.jump-link__label{font-size:var(--fs-14);color:var(--paper)}
.jump-link__route{
  margin-left:auto;
  font-family:var(--font-mono);
  font-size:.6875rem;
  color:var(--dust);
}

.scroll-progress{
  position:absolute;
  left:0;
  right:0;
  bottom:-1px;
  display:block;
  height:2px;
  overflow:hidden;
  pointer-events:none;
}
.scroll-progress__bar{
  display:block;
  width:0;
  height:100%;
  background:linear-gradient(90deg,var(--cyan),var(--amber));
}

/* ---------- 11. 页脚：四列轨道 ---------- */
.site-footer{
  position:relative;
  margin-top:clamp(48px,8vw,96px);
  padding:clamp(40px,6vw,72px) var(--pad-x) clamp(20px,3vw,30px);
  background:linear-gradient(180deg,rgba(6,8,20,.35),var(--ink) 42%);
  border-top:1px solid var(--line);
}
.footer-frame{
  display:grid;
  grid-template-columns:minmax(230px,1.05fr) 2.4fr;
  gap:clamp(28px,4vw,64px);
  width:100%;
  max-width:var(--frame);
  margin-inline:auto;
}
.footer-brand__note{
  margin-top:1rem;
  max-width:34ch;
  font-size:var(--fs-14);
  line-height:1.75;
  color:var(--dust);
}
.footer-marks{
  display:flex;
  flex-wrap:wrap;
  gap:.5rem;
  margin-top:1.25rem;
}
.footer-mark{
  padding:.35rem .6rem;
  border:1px solid var(--line);
  border-radius:var(--r-cut);
  font-family:var(--font-mono);
  font-size:.6875rem;
  letter-spacing:.08em;
  color:var(--dust);
}
.footer-tracks{
  display:grid;
  grid-template-columns:repeat(4,minmax(0,1fr));
  gap:clamp(18px,2.4vw,32px);
}
.footer-col__title{
  display:flex;
  align-items:baseline;
  justify-content:space-between;
  gap:.5rem;
  padding-bottom:.6rem;
  margin-bottom:.85rem;
  border-bottom:1px solid var(--line);
  font-family:var(--font-mono);
  font-size:.6875rem;
  font-weight:500;
  letter-spacing:.14em;
  text-transform:uppercase;
  color:var(--cyan);
}
.footer-col__idx{color:rgba(167,176,201,.5)}
.footer-list{display:grid;gap:.5rem}
.footer-list--tight{margin-top:1rem}
.footer-link{
  display:inline-block;
  font-size:var(--fs-14);
  color:var(--dust);
  transition:color .2s var(--ease),transform .2s var(--ease);
}
.footer-link:hover{color:var(--paper);transform:translateX(3px)}
.footer-contact{display:grid;gap:.6rem}
.contact-line{
  display:grid;
  grid-template-columns:auto 1fr;
  gap:.6rem;
  align-items:baseline;
}
.contact-line__key{
  font-family:var(--font-mono);
  font-size:.6875rem;
  letter-spacing:.1em;
  text-transform:uppercase;
  color:rgba(167,176,201,.7);
  white-space:nowrap;
}
.contact-line__val{
  font-size:var(--fs-14);
  color:var(--paper);
  word-break:break-word;
}
.contact-line__val--mono{font-family:var(--font-mono);letter-spacing:.02em}
.footer-legal{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:.6rem 1.4rem;
  width:100%;
  max-width:var(--frame);
  margin:clamp(32px,4vw,56px) auto 0;
  padding-top:1rem;
  border-top:1px solid var(--line);
  font-family:var(--font-mono);
  font-size:.6875rem;
  letter-spacing:.08em;
  color:rgba(167,176,201,.75);
}
.footer-legal__icp{color:var(--gold)}

/* ---------- 12. 渐显与可达性 ---------- */
html[data-js="on"] [data-reveal]{
  opacity:0;
  transform:translateY(14px);
  transition:opacity .6s var(--ease),transform .6s var(--ease);
}
html[data-js="on"] [data-reveal].is-visible{
  opacity:1;
  transform:none;
}

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

/* ---------- 13. 响应式 ---------- */
@media (max-width:1080px){
  .footer-frame{grid-template-columns:1fr;gap:clamp(24px,4vw,40px)}
  .footer-tracks{grid-template-columns:repeat(2,minmax(0,1fr))}
  .jump-panel__list{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media (max-width:1024px){
  .span-3,.span-4,.span-5{grid-column:span 6}
}
@media (max-width:960px){
  .header-frame{grid-template-columns:1fr auto}
  .nav-toggle{display:inline-flex}
  .nav-capsule{
    position:absolute;
    top:calc(100% + 8px);
    left:var(--pad-x);
    right:var(--pad-x);
    justify-self:stretch;
    max-height:calc(100vh - 120px);
    overflow:auto;
    padding:10px;
    border-radius:4px;
    background:rgba(6,8,20,.97);
    border-color:var(--line-strong);
    box-shadow:0 24px 60px rgba(0,0,0,.55);
    opacity:0;
    visibility:hidden;
    transform:translateY(-10px);
    pointer-events:none;
    transition:opacity .22s var(--ease),transform .22s var(--ease),visibility .22s var(--ease);
  }
  .nav-capsule[data-open]{
    opacity:1;
    visibility:visible;
    transform:none;
    pointer-events:auto;
  }
  .nav-capsule__list{flex-direction:column;align-items:stretch;gap:2px}
  .nav-link{
    justify-content:space-between;
    padding:.8rem .9rem;
    border-radius:var(--r-cut);
    border-bottom:1px solid rgba(167,176,201,.12);
    font-size:var(--fs-16);
  }
  .nav-link:last-child{border-bottom:0}
  .nav-link[aria-current="page"]{box-shadow:inset 2px 0 0 var(--cyan)}
  .tz-chip{display:none}
}
@media (max-width:720px){
  .span-3,.span-4,.span-5,.span-6,.span-7,.span-8,.span-9,.span-12{grid-column:span 12}
  .section-head--split{grid-template-columns:1fr;align-items:start}
  .jump-panel__list{grid-template-columns:1fr}
  .jump-link__route{font-size:.625rem}
}
@media (max-width:640px){
  .footer-tracks{grid-template-columns:1fr}
  .tool-button__label{display:none}
  .tool-button{padding:0 .6rem}
  .header-cta{padding:0 .8rem}
  .brand{gap:.55rem}
  .brand__orbit{width:28px;height:28px}
  .brand__star{width:8px;height:8px}
  .brand__name{font-size:.9375rem}
  .brand__meta{font-size:.5625rem}
  .footer-legal{justify-content:flex-start}
}