/* ============================================================
   星空赛事 · 共享样式 /assets/site.css
   深空底 + 蓝图网格 + 观测记录卡片
   ============================================================ */

*,*::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,time{margin:0}
ul,ol{padding:0;list-style:none}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;background:none;border:0;padding:0;cursor:pointer}
img,svg,video{display:block;max-width:100%}

:root{
  --deep:#060A14;
  --layer:#0D1526;
  --line:#1E2C4A;
  --ink:#16233F;
  --fog:#E8EDF7;
  --haze:#8A97B2;
  --gold:#F2C14E;
  --cyan:#38E1D6;
  --orange:#FF7A3D;
  --violet:#7A5CFF;
  --electric:#3A8CFF;

  --shell:1320px;
  --gutter:24px;
  --rail:96px;

  --font-display:"Space Grotesk","PingFang SC","Noto Sans SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  --font-body:"Noto Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  --font-mono:"JetBrains Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,"Courier New",monospace;
  --ease:cubic-bezier(.22,.68,0,1);
}

/* ---------- 基础排版 ---------- */
body{
  min-height:100vh;
  font-family:var(--font-body);
  font-size:16px;
  line-height:1.75;
  color:var(--fog);
  background-color:var(--deep);
  letter-spacing:.01em;
  overflow-x:hidden;
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4{
  font-family:var(--font-display);
  font-weight:800;
  line-height:1.06;
  letter-spacing:-.02em;
  color:var(--fog);
}
p{max-width:38em}
::selection{background:rgba(56,225,214,.28);color:#fff}
:focus-visible{outline:2px solid var(--cyan);outline-offset:3px;border-radius:2px}

/* ---------- 星图与蓝图网格背景 ---------- */
body::before{
  content:"";
  position:fixed;
  inset:-24px;
  z-index:0;
  pointer-events:none;
  background-image:
    linear-gradient(90deg,rgba(30,44,74,.55) 1px,transparent 1px),
    linear-gradient(180deg,rgba(30,44,74,.55) 1px,transparent 1px);
  background-size:96px 96px;
  opacity:.34;
  animation:veil-drift 60s ease-in-out infinite alternate;
}
body::after{
  content:"";
  position:fixed;
  inset:-40px;
  z-index:0;
  pointer-events:none;
  opacity:.9;
  background-image:
    radial-gradient(1.5px 1.5px at 14% 22%,rgba(232,237,247,.75),transparent),
    radial-gradient(1px 1px at 28% 68%,rgba(232,237,247,.5),transparent),
    radial-gradient(1.5px 1.5px at 46% 12%,rgba(56,225,214,.55),transparent),
    radial-gradient(1px 1px at 62% 44%,rgba(232,237,247,.42),transparent),
    radial-gradient(2px 2px at 78% 74%,rgba(242,193,78,.5),transparent),
    radial-gradient(1px 1px at 88% 30%,rgba(232,237,247,.55),transparent),
    radial-gradient(1px 1px at 34% 88%,rgba(232,237,247,.35),transparent),
    radial-gradient(1.5px 1.5px at 8% 62%,rgba(122,92,255,.45),transparent);
  animation:star-drift 60s ease-in-out infinite alternate;
}
@keyframes veil-drift{
  from{transform:translate3d(0,0,0)}
  to{transform:translate3d(6px,-8px,0)}
}
@keyframes star-drift{
  from{transform:translate3d(0,0,0)}
  to{transform:translate3d(-8px,6px,0)}
}
@keyframes breath{
  0%,100%{opacity:.55;transform:scale(.86)}
  50%{opacity:1;transform:scale(1.14)}
}

#main-content,.site-header,.site-footer{position:relative;z-index:1}

/* ---------- 布局工具 ---------- */
.shell{
  width:100%;
  max-width:var(--shell);
  margin-inline:auto;
  padding-inline:var(--gutter);
}
.container{
  width:100%;
  max-width:var(--shell);
  margin-inline:auto;
  padding-inline:var(--gutter);
}
.grid{display:grid;gap:24px}
.grid--12{grid-template-columns:repeat(12,minmax(0,1fr))}
.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}
.hairline{height:1px;background:var(--line);border:0;margin-block:32px}
.rail{
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.12em;
  line-height:1.9;
  color:var(--haze);
  border-left:1px solid var(--line);
  padding-left:16px;
}

/* ---------- 跳转链 ---------- */
.skip-link{
  position:absolute;
  left:16px;
  top:-72px;
  z-index:200;
  padding:10px 18px;
  background:var(--gold);
  color:#060A14;
  font-family:var(--font-display);
  font-size:13px;
  font-weight:700;
  letter-spacing:.04em;
  border-radius:2px;
  transition:top .2s var(--ease);
}
.skip-link:focus{top:12px}

/* ============================================================
   头部
   ============================================================ */
.site-header{
  position:sticky;
  top:0;
  z-index:80;
  background:linear-gradient(180deg,rgba(6,10,20,.98) 0%,rgba(8,13,24,.94) 100%);
  border-bottom:1px solid var(--line);
}
.site-header[data-scrolled]{border-bottom-color:rgba(56,225,214,.28)}

/* 批次带 */
.data-band{
  overflow:hidden;
  max-height:46px;
  opacity:1;
  border-bottom:1px solid rgba(30,44,74,.7);
  background:linear-gradient(90deg,rgba(13,21,38,.95) 0%,rgba(6,10,20,.55) 100%);
  transition:max-height .3s var(--ease),opacity .3s var(--ease),border-color .3s var(--ease);
}
.site-header[data-scrolled] .data-band{
  max-height:0;
  opacity:0;
  border-bottom-color:transparent;
}
.data-band__inner{
  display:flex;
  align-items:center;
  gap:14px;
  min-height:38px;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.12em;
  text-transform:uppercase;
  color:var(--haze);
  white-space:nowrap;
}
.data-band__tag{color:var(--gold);letter-spacing:.2em}
.data-band__dot{
  width:6px;
  height:6px;
  flex:0 0 auto;
  border-radius:50%;
  background:var(--cyan);
  box-shadow:0 0 10px rgba(56,225,214,.9);
  animation:breath 3.6s ease-in-out infinite;
}
.data-band__text{overflow:hidden;text-overflow:ellipsis}
.data-band__text time{color:var(--fog);font-variant-numeric:tabular-nums}
.data-band__coord{
  margin-left:auto;
  color:rgba(138,151,178,.72);
  letter-spacing:.16em;
}

/* 字标与导航分置 */
.masthead{
  display:flex;
  align-items:center;
  gap:24px;
  min-height:78px;
  padding-block:12px;
}
.brand{
  display:inline-flex;
  align-items:center;
  gap:12px;
  flex:0 0 auto;
  padding:6px 2px;
}
.brand__star{
  position:relative;
  width:10px;
  height:10px;
  border-radius:50%;
  background:var(--gold);
  box-shadow:0 0 18px rgba(242,193,78,.7);
  animation:breath 4.4s ease-in-out infinite;
}
.brand__star::before,
.brand__star::after{
  content:"";
  position:absolute;
  left:50%;
  top:50%;
  background:rgba(242,193,78,.5);
  transform:translate(-50%,-50%);
}
.brand__star::before{width:22px;height:1px}
.brand__star::after{width:1px;height:22px}
.brand__word{
  font-family:var(--font-display);
  font-weight:800;
  font-size:20px;
  letter-spacing:.1em;
  color:var(--fog);
}
.brand__sub{
  font-family:var(--font-mono);
  font-size:10px;
  letter-spacing:.26em;
  text-transform:uppercase;
  color:var(--haze);
  border-left:1px solid var(--line);
  padding-left:12px;
}

/* 移动端索引按钮 */
.nav-toggle{
  display:none;
  align-items:center;
  gap:10px;
  margin-left:auto;
  padding:10px 14px;
  border:1px solid var(--line);
  border-radius:2px;
  color:var(--fog);
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.16em;
  text-transform:uppercase;
  transition:border-color .18s var(--ease),color .18s var(--ease);
}
.nav-toggle:hover{border-color:rgba(56,225,214,.6);color:var(--cyan)}
.nav-toggle__bars{display:grid;gap:4px;width:16px}
.nav-toggle__bars i{
  display:block;
  height:1px;
  background:currentColor;
  transition:transform .22s var(--ease),opacity .22s var(--ease);
}
.nav-toggle__label{line-height:1}

/* 导航 */
.site-nav{margin-left:auto}
.site-nav__list{display:flex;align-items:center;gap:4px}
.site-nav__link{
  display:inline-flex;
  align-items:baseline;
  gap:7px;
  padding:11px 12px;
  border:1px solid transparent;
  border-radius:2px;
  font-family:var(--font-display);
  font-size:14px;
  font-weight:500;
  letter-spacing:.02em;
  color:var(--haze);
  white-space:nowrap;
  transition:color .18s var(--ease),border-color .18s var(--ease),background-color .18s var(--ease);
}
.site-nav__num{
  font-family:var(--font-mono);
  font-size:10px;
  letter-spacing:.1em;
  color:rgba(138,151,178,.6);
  transition:color .18s var(--ease);
}
.site-nav__link:hover{color:var(--fog);border-color:rgba(56,225,214,.42)}
.site-nav__link:hover .site-nav__num{color:var(--cyan)}
.site-nav__link[aria-current="page"]{
  color:var(--fog);
  border-color:rgba(242,193,78,.55);
  background:rgba(242,193,78,.07);
}
.site-nav__link[aria-current="page"] .site-nav__num{color:var(--gold)}
.site-nav__link--cta{
  margin-left:10px;
  border-color:rgba(242,193,78,.6);
  color:var(--gold);
}
.site-nav__link--cta .site-nav__num{color:rgba(242,193,78,.75)}
.site-nav__link--cta:hover{
  border-color:var(--gold);
  color:#FFDD96;
  background:rgba(242,193,78,.12);
}
.site-nav__link--cta[aria-current="page"]{
  border-color:var(--gold);
  background:rgba(242,193,78,.16);
  color:#FFDD96;
}

/* 阅读进度细线 */
.scroll-meter{
  position:absolute;
  left:0;
  right:0;
  bottom:-1px;
  height:2px;
  overflow:hidden;
  pointer-events:none;
}
.scroll-meter i{
  display:block;
  width:0;
  height:100%;
  background:linear-gradient(90deg,var(--gold),var(--cyan));
  transition:width .12s linear;
}

/* ============================================================
   页脚
   ============================================================ */
.site-footer{
  position:relative;
  z-index:1;
  margin-top:96px;
  overflow:hidden;
  border-top:1px solid var(--line);
  background:
    radial-gradient(120% 90% at 18% 0%,rgba(22,35,63,.9) 0%,rgba(6,10,20,0) 62%),
    linear-gradient(180deg,#080D18 0%,#050810 100%);
}
.footer-terrain{
  position:absolute;
  left:0;
  right:0;
  bottom:0;
  height:240px;
  z-index:0;
  pointer-events:none;
  opacity:.5;
  background-image:linear-gradient(180deg,rgba(58,140,255,0) 0%,rgba(58,140,255,.16) 100%);
  clip-path:polygon(0 100%,0 64%,6% 55%,12% 62%,19% 47%,26% 54%,32% 41%,39% 51%,46% 38%,53% 48%,61% 34%,68% 46%,75% 40%,82% 52%,89% 44%,95% 57%,100% 50%,100% 100%);
}
.footer-terrain::after{
  content:"";
  position:absolute;
  inset:0;
  background-image:repeating-linear-gradient(115deg,rgba(232,237,247,.09) 0 1px,transparent 1px 16px);
  mix-blend-mode:screen;
}
.footer-wordmark{
  position:absolute;
  right:-4px;
  bottom:-18px;
  z-index:0;
  margin:0;
  max-width:none;
  font-family:var(--font-display);
  font-weight:800;
  font-size:clamp(64px,12vw,180px);
  line-height:.8;
  letter-spacing:-.04em;
  text-transform:uppercase;
  color:transparent;
  -webkit-text-stroke:1px rgba(30,44,74,.75);
  pointer-events:none;
  user-select:none;
}
.footer-mast{
  position:relative;
  z-index:1;
  display:grid;
  grid-template-columns:1.45fr .75fr .95fr 1.15fr;
  gap:40px;
  padding-block:72px 52px;
}
.footer-brand__mark{
  font-family:var(--font-display);
  font-weight:800;
  font-size:clamp(24px,2.6vw,32px);
  letter-spacing:.06em;
  line-height:1.1;
  color:var(--fog);
  max-width:12em;
  margin-bottom:16px;
}
.footer-brand__desc{
  font-size:14px;
  line-height:1.8;
  color:var(--haze);
  max-width:26em;
}
.footer-brand__coords{
  margin-top:18px;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.14em;
  text-transform:uppercase;
  color:rgba(138,151,178,.7);
}
.footer-col{min-width:0}
.footer-col__title{
  font-family:var(--font-mono);
  font-size:11px;
  font-weight:400;
  letter-spacing:.2em;
  text-transform:uppercase;
  color:var(--gold);
  padding-bottom:12px;
  margin-bottom:14px;
  border-bottom:1px solid var(--line);
  line-height:1.4;
}
.footer-list li{padding:8px 0;font-size:14px;color:var(--haze)}
.footer-list a{
  display:inline-block;
  border-bottom:1px solid transparent;
  transition:color .18s var(--ease),border-color .18s var(--ease),transform .18s var(--ease);
}
.footer-list a:hover{
  color:var(--cyan);
  border-bottom-color:rgba(56,225,214,.5);
  transform:translateX(3px);
}
.footer-list--plain li{
  display:flex;
  align-items:baseline;
  justify-content:space-between;
  gap:14px;
  padding:9px 0;
  font-size:13px;
  border-bottom:1px dashed rgba(30,44,74,.8);
}
.footer-list--plain li:last-child{border-bottom:0}
.footer-k{
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.1em;
  color:var(--haze);
}
.footer-v{color:var(--fog);font-variant-numeric:tabular-nums;text-align:right}
.footer-contact{display:grid;gap:14px}
.footer-contact__row{display:grid;gap:2px}
.footer-contact__label{
  font-family:var(--font-mono);
  font-size:10px;
  letter-spacing:.18em;
  text-transform:uppercase;
  color:rgba(138,151,178,.78);
}
.footer-contact__value{
  font-size:14px;
  line-height:1.6;
  color:var(--fog);
  word-break:break-all;
}
.footer-contact__note{
  margin-top:4px;
  font-size:12px;
  line-height:1.7;
  color:var(--haze);
  border-left:1px solid var(--orange);
  padding-left:10px;
  max-width:24em;
}
.footer-base{
  position:relative;
  z-index:1;
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:12px 24px;
  padding-block:20px 32px;
  border-top:1px solid rgba(30,44,74,.85);
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.1em;
  color:rgba(138,151,178,.82);
}
.footer-base__meta{display:flex;flex-wrap:wrap;gap:8px 20px;align-items:center}
.footer-base__links{margin-left:auto;display:flex;flex-wrap:wrap;gap:18px}
.footer-base__links a{
  color:var(--haze);
  border-bottom:1px solid transparent;
  transition:color .18s var(--ease),border-color .18s var(--ease);
}
.footer-base__links a:hover{color:var(--cyan);border-bottom-color:rgba(56,225,214,.55)}

/* ============================================================
   通用组件
   ============================================================ */
/* 按钮 */
.btn{
  display:inline-flex;
  align-items:center;
  gap:10px;
  padding:13px 22px;
  border:1px solid var(--line);
  border-radius:2px;
  background:rgba(13,21,38,.72);
  font-family:var(--font-display);
  font-size:14px;
  font-weight:600;
  letter-spacing:.04em;
  color:var(--fog);
  transition:border-color .18s var(--ease),color .18s var(--ease),background-color .18s var(--ease),transform .18s var(--ease);
}
.btn:hover{
  border-color:var(--cyan);
  color:#fff;
  background:rgba(56,225,214,.08);
  transform:translateY(-1px);
}
.btn--gold{
  border-color:rgba(242,193,78,.7);
  background:rgba(242,193,78,.09);
  color:var(--gold);
}
.btn--gold:hover{
  border-color:var(--gold);
  background:rgba(242,193,78,.18);
  color:#FFDD96;
}
.btn--ghost{background:transparent}

/* 面包屑 */
.breadcrumb{
  padding-block:22px;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.12em;
  color:var(--haze);
}
.breadcrumb__list{display:flex;flex-wrap:wrap;align-items:center;gap:8px}
.breadcrumb__item{display:inline-flex;align-items:center;gap:8px}
.breadcrumb__link{
  color:var(--haze);
  border-bottom:1px solid transparent;
  transition:color .18s var(--ease),border-color .18s var(--ease);
}
.breadcrumb__link:hover{color:var(--cyan);border-bottom-color:rgba(56,225,214,.55)}
.breadcrumb__sep{color:rgba(138,151,178,.45)}
.breadcrumb__current{color:var(--gold)}

/* 区块头 */
.section-head{
  display:grid;
  gap:10px;
  padding-bottom:18px;
  margin-bottom:32px;
  border-bottom:1px solid var(--line);
}
.section-head__index{
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.2em;
  text-transform:uppercase;
  color:var(--gold);
}
.section-head__title{
  font-family:var(--font-display);
  font-weight:800;
  font-size:clamp(22px,3vw,34px);
  line-height:1.08;
  letter-spacing:-.015em;
  color:var(--fog);
}
.section-head__lead{
  font-size:15px;
  line-height:1.8;
  color:var(--haze);
  max-width:56ch;
}

/* 文本 */
.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:10px;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.2em;
  text-transform:uppercase;
  color:var(--gold);
}
.eyebrow::before{content:"";width:24px;height:1px;background:var(--gold);opacity:.75}
.mono{
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.12em;
  text-transform:uppercase;
  color:var(--haze);
}
.lead{
  font-size:clamp(15px,1.6vw,18px);
  line-height:1.72;
  color:#BCC7DC;
  max-width:46ch;
}
.numeral{
  font-family:var(--font-display);
  font-weight:800;
  font-size:clamp(40px,5vw,72px);
  line-height:1;
  letter-spacing:-.03em;
  color:var(--fog);
  font-variant-numeric:tabular-nums;
}
.prose{
  max-width:68ch;
  font-size:16px;
  line-height:1.85;
  color:#CFD8EA;
}
.prose > * + *{margin-top:1.1em}
.prose h2{
  font-family:var(--font-display);
  font-size:clamp(20px,2.4vw,28px);
  line-height:1.22;
  letter-spacing:-.015em;
  color:var(--fog);
  margin-top:2em;
}
.prose h3{
  font-family:var(--font-display);
  font-size:18px;
  line-height:1.3;
  color:var(--fog);
  margin-top:1.6em;
}
.prose strong{color:#fff}
.prose a{color:var(--cyan);border-bottom:1px solid rgba(56,225,214,.45)}
.prose a:hover{border-bottom-color:var(--cyan)}
.prose ul{display:grid;gap:8px}
.prose ul li{position:relative;padding-left:18px}
.prose ul li::before{
  content:"";
  position:absolute;
  left:0;
  top:.82em;
  width:8px;
  height:1px;
  background:var(--cyan);
}

/* 标签 / chip */
.tag{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:4px 10px;
  border:1px solid var(--line);
  border-radius:2px;
  font-family:var(--font-mono);
  font-size:10px;
  letter-spacing:.14em;
  text-transform:uppercase;
  color:var(--haze);
  line-height:1.6;
}
.tag--gold{border-color:rgba(242,193,78,.6);color:var(--gold)}
.tag--cyan{border-color:rgba(56,225,214,.55);color:var(--cyan)}
.tag--orange{border-color:rgba(255,122,61,.6);color:var(--orange)}
.chip{
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:8px 15px;
  border:1px solid var(--line);
  border-radius:999px;
  background:rgba(13,21,38,.65);
  font-size:13px;
  letter-spacing:.02em;
  color:var(--haze);
  transition:border-color .18s var(--ease),color .18s var(--ease),background-color .18s var(--ease);
}
.chip:hover{border-color:rgba(56,225,214,.55);color:var(--fog)}
.chip[aria-pressed="true"]{
  border-color:var(--gold);
  background:rgba(242,193,78,.1);
  color:var(--gold);
}

/* 卡片 / 面板 */
.card{
  position:relative;
  padding:24px;
  border:1px solid var(--line);
  border-radius:2px;
  background:linear-gradient(180deg,rgba(13,21,38,.94) 0%,rgba(9,14,26,.94) 100%);
  transition:border-color .18s var(--ease),transform .18s var(--ease),box-shadow .18s var(--ease);
}
.card:hover{
  border-color:rgba(56,225,214,.6);
  transform:translateY(-2px);
  box-shadow:0 18px 40px -28px rgba(56,225,214,.55);
}
.card::before{
  content:"";
  position:absolute;
  top:8px;
  right:8px;
  width:10px;
  height:10px;
  border-top:1px solid rgba(56,225,214,.35);
  border-right:1px solid rgba(56,225,214,.35);
  pointer-events:none;
}
.panel{
  border:1px solid var(--line);
  border-radius:2px;
  background:rgba(13,21,38,.88);
}
.panel__head{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  padding:13px 20px;
  border-bottom:1px solid var(--line);
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.14em;
  text-transform:uppercase;
  color:var(--haze);
}
.panel__title{
  font-family:var(--font-mono);
  font-size:12px;
  font-weight:400;
  letter-spacing:.14em;
  color:var(--fog);
}
.panel__body{padding:20px}

/* 图片容器基础规则（页面阶段放占位） */
.media{position:relative;margin:0}
.media__frame{
  position:relative;
  overflow:hidden;
  aspect-ratio:4/3;
  border:1px solid var(--line);
  border-radius:2px;
  background-color:var(--ink);
  background-image:
    linear-gradient(135deg,rgba(22,35,63,.92) 0%,rgba(6,10,20,.95) 100%),
    repeating-linear-gradient(90deg,rgba(30,44,74,.55) 0 1px,transparent 1px 48px),
    repeating-linear-gradient(0deg,rgba(30,44,74,.55) 0 1px,transparent 1px 48px);
  background-blend-mode:normal;
}
.media__frame::before{
  content:"";
  position:absolute;
  inset:10px;
  border:1px solid rgba(56,225,214,.16);
  pointer-events:none;
}
.media__frame::after{
  content:"";
  position:absolute;
  inset:0;
  background-image:radial-gradient(70% 60% at 78% 18%,rgba(122,92,255,.22),transparent 70%);
  pointer-events:none;
}
.media--wide .media__frame{aspect-ratio:21/9}
.media--tall .media__frame{aspect-ratio:3/4}
.media--square .media__frame{aspect-ratio:1/1}
.media__img{
  position:relative;
  z-index:1;
  width:100%;
  height:100%;
  object-fit:cover;
}
.media__caption{
  display:flex;
  gap:10px;
  margin-top:10px;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.08em;
  line-height:1.7;
  color:var(--haze);
}
.media__index{color:var(--gold);flex:0 0 auto}

/* ---------- 滚动显现 ---------- */
[data-reveal]{
  opacity:0;
  transform:translateY(14px);
  transition:opacity .5s var(--ease),transform .5s var(--ease);
  will-change:opacity,transform;
}
[data-reveal].is-revealed{opacity:1;transform:none;will-change:auto}

/* ============================================================
   响应式
   ============================================================ */
@media (max-width:1180px){
  .site-nav__link{padding:10px 9px;font-size:13px}
  .footer-mast{grid-template-columns:1.3fr .8fr 1fr;row-gap:44px}
  .footer-col:last-child{grid-column:span 3}
}
@media (max-width:1100px){
  .brand__sub{display:none}
}
@media (max-width:1024px){
  :root{--gutter:20px}
  .scroll-meter{display:none}
}
@media (max-width:960px){
  :root{--gutter:20px}
  .masthead{min-height:64px;padding-block:10px;gap:16px}
  .nav-toggle{display:inline-flex;position:relative;z-index:95}
  .site-header[data-open] .nav-toggle{border-color:rgba(242,193,78,.6);color:var(--gold)}
  .site-header[data-open] .nav-toggle__bars i:first-child{transform:translateY(2.5px) rotate(45deg)}
  .site-header[data-open] .nav-toggle__bars i:last-child{transform:translateY(-2.5px) rotate(-45deg)}

  .site-nav{
    position:fixed;
    inset:0;
    z-index:90;
    margin:0;
    padding:104px 24px 48px;
    display:flex;
    flex-direction:column;
    overflow-y:auto;
    opacity:0;
    visibility:hidden;
    transform:translateY(-10px);
    transition:opacity .24s var(--ease),transform .24s var(--ease),visibility .24s var(--ease);
    background:
      radial-gradient(90% 60% at 82% 8%,rgba(122,92,255,.18),transparent 62%),
      radial-gradient(70% 50% at 12% 88%,rgba(56,225,214,.12),transparent 66%),
      linear-gradient(180deg,#070C18 0%,#04070F 100%);
    border-bottom:1px solid var(--line);
  }
  .site-nav[data-open]{
    opacity:1;
    visibility:visible;
    transform:none;
  }
  .site-nav__list{
    flex-direction:column;
    align-items:stretch;
    gap:0;
    width:100%;
  }
  .site-nav__list li{border-bottom:1px solid rgba(30,44,74,.85)}
  .site-nav__link{
    width:100%;
    justify-content:flex-start;
    gap:16px;
    padding:18px 4px;
    border:0;
    border-radius:0;
    font-size:clamp(20px,5.4vw,28px);
    font-weight:700;
    letter-spacing:-.01em;
    color:var(--fog);
  }
  .site-nav__num{font-size:12px;letter-spacing:.16em;color:var(--gold)}
  .site-nav__link[aria-current="page"]{
    background:transparent;
    border-color:transparent;
    color:var(--gold);
  }
  .site-nav__link[aria-current="page"]::after{
    content:"当前";
    margin-left:auto;
    font-family:var(--font-mono);
    font-size:10px;
    letter-spacing:.18em;
    color:var(--gold);
    border:1px solid rgba(242,193,78,.55);
    border-radius:2px;
    padding:2px 6px;
  }
  .site-nav__link--cta{
    margin:26px 0 0;
    justify-content:center;
    padding:16px 20px;
    border:1px solid var(--gold);
    border-radius:2px;
    color:var(--gold);
    font-size:17px;
    background:rgba(242,193,78,.08);
  }
  .site-nav__list li:last-child{border-bottom:0}
  body.nav-open{overflow:hidden}

  .data-band__coord{display:none}
  .footer-mast{grid-template-columns:1fr 1fr;gap:36px;padding-block:56px 40px}
  .footer-col:last-child{grid-column:span 2}
  .footer-wordmark{font-size:clamp(56px,16vw,120px);bottom:-8px}
}
@media (max-width:860px){
  .grid--12{grid-template-columns:repeat(6,minmax(0,1fr))}
  .col-4,.col-5,.col-6,.col-7,.col-8{grid-column:span 6}
}
@media (max-width:640px){
  :root{--gutter:18px}
  .data-band{max-height:40px}
  .data-band__inner{min-height:34px;font-size:10px;letter-spacing:.08em;gap:10px}
  .data-band__tag{letter-spacing:.14em}
  .brand__word{font-size:18px;letter-spacing:.08em}
  .footer-mast{grid-template-columns:1fr;gap:32px}
  .footer-col:last-child{grid-column:span 1}
  .footer-base{flex-direction:column;align-items:flex-start;gap:14px;padding-bottom:28px}
  .footer-base__links{margin-left:0;gap:16px}
  .site-footer{margin-top:72px}
  .footer-terrain{height:170px}
  .numeral{font-size:clamp(34px,9vw,52px)}
}

/* ---------- 动效偏好 ---------- */
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
    transition-delay:0ms !important;
  }
  body::before,body::after{animation:none}
  [data-reveal]{opacity:1;transform:none}
  .scroll-meter{transition:none}
  .footer-list a:hover{transform:none}
  .card:hover{transform:none}
  .btn:hover{transform:none}
}