:root{
  --bg-ink:#0B1836;
  --bg-panel:#101F42;
  --cyan:#19E0D2;
  --signal:#F5C542;
  --card-red:#E5484D;
  --card-yellow:#F7B32B;
  --paper:#F4F0E6;
  --steel:#8DA2C0;
  --deep:#050A18;
  --glass:rgba(25,224,210,.12);
  --glass-strong:rgba(25,224,210,.18);
  --line:rgba(141,162,192,.24);
  --line-soft:rgba(141,162,192,.13);
  --ink-text:#16213C;
  --ink-text-soft:#4A5A78;

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

  --shell:1280px;
  --gutter:24px;
  --r-xs:4px;
  --r-sm:8px;
  --r-md:14px;
  --r-lg:22px;
  --ease:cubic-bezier(.22,.61,.36,1);
}

*,*::before,*::after{box-sizing:border-box}

html{
  -webkit-text-size-adjust:100%;
  text-size-adjust:100%;
  scroll-behavior:smooth;
}

body{
  margin:0;
  min-height:100%;
  background-color:var(--bg-ink);
  background-image:
    radial-gradient(120% 82% at 84% -12%, rgba(25,224,210,.13), transparent 55%),
    radial-gradient(96% 72% at -6% 58%, rgba(245,197,66,.07), transparent 55%);
  background-attachment:fixed;
  color:var(--paper);
  font-family:var(--font-body);
  font-size:16px;
  line-height:1.75;
  font-weight:400;
  letter-spacing:.01em;
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
  text-rendering:optimizeLegibility;
}

img,svg,video{display:block;max-width:100%;height:auto}
a{color:var(--cyan);text-decoration:none}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer;padding:0}
ul,ol{list-style:none;margin:0;padding:0}
h1,h2,h3,h4,h5,p,figure,blockquote{margin:0}
table{border-collapse:collapse;width:100%}

:focus-visible{
  outline:2px solid var(--cyan);
  outline-offset:3px;
  border-radius:2px;
}

/* ---------- 排版 ---------- */
.display-1,.display-2,.display-3{
  font-family:var(--font-display);
  font-weight:900;
  font-stretch:condensed;
  line-height:1.03;
  letter-spacing:-.03em;
  color:var(--paper);
}
.display-1{font-size:clamp(42px,7.4vw,96px)}
.display-2{font-size:clamp(30px,4.6vw,58px)}
.display-3{font-size:clamp(22px,2.6vw,34px);letter-spacing:-.015em;line-height:1.2}

.num{
  font-family:var(--font-mono);
  font-variant-numeric:tabular-nums;
  font-feature-settings:"tnum" 1;
  letter-spacing:-.01em;
}

.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:9px;
  font-family:var(--font-mono);
  font-size:12px;
  font-weight:700;
  letter-spacing:.18em;
  text-transform:uppercase;
  color:var(--steel);
}
.eyebrow::before{
  content:"";
  width:18px;
  height:2px;
  background:var(--cyan);
  flex:none;
}

.index-tag{
  display:inline-block;
  font-family:var(--font-mono);
  font-size:11px;
  font-weight:700;
  letter-spacing:.16em;
  color:var(--deep);
  background:var(--signal);
  padding:3px 8px;
  border-radius:var(--r-xs);
  line-height:1.5;
}

.lede{
  font-size:clamp(16px,1.4vw,19px);
  color:var(--steel);
  max-width:64ch;
}
.muted{color:var(--steel)}

.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;
}

/* ---------- 布局 ---------- */
.shell{
  width:100%;
  max-width:var(--shell);
  margin:0 auto;
  padding:0 var(--gutter);
}

.section{
  position:relative;
  padding:clamp(48px,7vw,96px) 0;
}
.section__head{
  display:flex;
  flex-wrap:wrap;
  align-items:flex-end;
  gap:14px 32px;
  margin-bottom:clamp(24px,3.4vw,44px);
}
.section__head > .section__title{flex:0 1 auto}
.section__title{
  font-family:var(--font-display);
  font-weight:900;
  font-stretch:condensed;
  letter-spacing:-.025em;
  line-height:1.08;
  font-size:clamp(28px,4.2vw,52px);
  color:var(--paper);
}
.section__lede{
  color:var(--steel);
  max-width:60ch;
  flex:1 1 320px;
}
.section--panel{background:var(--bg-panel)}
.section--paper{background:var(--paper);color:var(--ink-text);border-radius:var(--r-lg)}
.section--paper .section__title{color:var(--ink-text)}
.section--paper .section__lede{color:var(--ink-text-soft)}
.section--paper .eyebrow{color:var(--ink-text-soft)}
.section--paper .eyebrow::before{background:var(--signal)}

.grid{
  display:grid;
  gap:var(--gutter);
}
.grid--2{grid-template-columns:repeat(2,minmax(0,1fr))}
.grid--3{grid-template-columns:repeat(3,minmax(0,1fr))}
.grid--4{grid-template-columns:repeat(4,minmax(0,1fr))}
.grid--asym{grid-template-columns:minmax(0,7fr) minmax(0,5fr)}
.grid--asym-alt{grid-template-columns:minmax(0,4fr) minmax(0,8fr)}
.grid--5-7{grid-template-columns:minmax(0,5fr) minmax(0,7fr)}

.stack{position:relative}
.stack > * + *{margin-top:clamp(16px,2.4vw,32px)}

/* ---------- 面板 ---------- */
.panel{
  position:relative;
  background:var(--bg-panel);
  border:1px solid var(--line-soft);
  border-radius:var(--r-md);
  padding:clamp(20px,2.6vw,32px);
}
.panel--glass{
  background:linear-gradient(158deg, rgba(25,224,210,.15), rgba(16,31,66,.74) 62%);
  border-color:rgba(25,224,210,.32);
  backdrop-filter:blur(14px) saturate(130%);
  -webkit-backdrop-filter:blur(14px) saturate(130%);
}
.panel--paper{
  background:var(--paper);
  color:var(--ink-text);
  border-color:transparent;
}
.panel--flush{padding:0;overflow:hidden}
.panel--flush .panel__body{padding:clamp(20px,2.6vw,32px)}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:10px;
  padding:12px 24px;
  font-family:var(--font-display);
  font-size:15px;
  font-weight:700;
  letter-spacing:.04em;
  line-height:1.3;
  border-radius:999px;
  border:1px solid transparent;
  cursor:pointer;
  transition:background-color .22s var(--ease),color .22s var(--ease),border-color .22s var(--ease),transform .22s var(--ease);
}
.btn--signal{background:var(--signal);color:var(--deep)}
.btn--signal:hover{background:#FFD75E;transform:translateY(-1px)}
.btn--cyan{background:var(--cyan);color:var(--deep)}
.btn--cyan:hover{background:#4CF0E5;transform:translateY(-1px)}
.btn--ghost{background:transparent;color:var(--paper);border-color:var(--line)}
.btn--ghost:hover{border-color:var(--cyan);color:var(--cyan)}
.btn--block{width:100%}

/* ---------- 面包屑 ---------- */
.crumbs{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:9px;
  padding:22px 0 0;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.06em;
  color:var(--steel);
}
.crumbs a{
  color:var(--steel);
  border-bottom:1px solid transparent;
  transition:color .22s var(--ease),border-color .22s var(--ease);
}
.crumbs a:hover{color:var(--cyan);border-color:var(--cyan)}
.crumbs__sep{color:rgba(141,162,192,.45)}
.crumbs [aria-current="page"]{color:var(--paper)}

/* ---------- 正文容器 ---------- */
.prose{
  max-width:70ch;
  font-size:17px;
  line-height:1.8;
  color:#D9E2F0;
}
.prose > * + *{margin-top:1.05em}
.prose h2,.prose h3{
  font-family:var(--font-display);
  font-weight:800;
  letter-spacing:-.015em;
  line-height:1.28;
  color:var(--paper);
}
.prose h2{font-size:clamp(22px,2.6vw,30px);margin-top:1.8em}
.prose h3{font-size:19px;margin-top:1.5em}
.prose ul,.prose ol{padding-left:1.25em}
.prose ul{list-style:disc}
.prose ol{list-style:decimal}
.prose li + li{margin-top:.5em}
.prose a{
  color:var(--cyan);
  border-bottom:1px solid rgba(25,224,210,.45);
  transition:background-color .22s var(--ease),border-color .22s var(--ease);
}
.prose a:hover{background:var(--glass);border-color:var(--cyan)}
.prose strong{color:var(--paper);font-weight:700}
.prose code{
  font-family:var(--font-mono);
  font-size:.92em;
  background:var(--glass);
  color:var(--cyan);
  padding:2px 6px;
  border-radius:var(--r-xs);
}
.prose blockquote{
  margin:1.6em 0;
  padding:14px 22px;
  border-left:3px solid var(--signal);
  background:rgba(245,197,66,.07);
  color:#CFD9EA;
}
.panel--paper .prose,.section--paper .prose{color:var(--ink-text-soft)}
.panel--paper .prose h2,.panel--paper .prose h3,
.section--paper .prose h2,.section--paper .prose h3{color:var(--ink-text)}
.panel--paper .prose strong,.section--paper .prose strong{color:var(--ink-text)}

/* ---------- 标签 ---------- */
.chip{
  display:inline-flex;
  align-items:center;
  gap:7px;
  font-family:var(--font-mono);
  font-size:11px;
  font-weight:700;
  letter-spacing:.12em;
  text-transform:uppercase;
  padding:4px 11px;
  border-radius:999px;
  border:1px solid var(--line);
  background:rgba(16,31,66,.6);
  color:var(--steel);
  line-height:1.6;
}
.chip--cyan{color:var(--cyan);border-color:rgba(25,224,210,.42);background:var(--glass)}
.chip--signal{color:var(--deep);background:var(--signal);border-color:var(--signal)}
.chip--yellow{color:var(--deep);background:var(--card-yellow);border-color:var(--card-yellow)}
.chip--red{color:#FFFFFF;background:var(--card-red);border-color:var(--card-red)}
.chip--ghost{background:transparent}

/* ---------- 统计 ---------- */
.stat{display:flex;flex-direction:column;gap:2px}
.stat__num{
  font-family:var(--font-mono);
  font-variant-numeric:tabular-nums;
  font-weight:700;
  font-size:clamp(24px,3vw,38px);
  line-height:1.1;
  color:var(--cyan);
}
.stat__num--signal{color:var(--signal)}
.stat__label{
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.14em;
  text-transform:uppercase;
  color:var(--steel);
}

/* ---------- 条目流 ---------- */
.data-list{display:flex;flex-direction:column}
.data-row{
  display:grid;
  grid-template-columns:auto minmax(0,1fr) auto;
  align-items:center;
  gap:14px;
  padding:14px 4px;
  border-bottom:1px solid var(--line-soft);
  transition:background-color .2s var(--ease),padding-left .2s var(--ease);
}
.data-row:hover{background:rgba(25,224,210,.07);padding-left:14px}
.data-row__index{
  font-family:var(--font-mono);
  font-size:12px;
  color:var(--steel);
  letter-spacing:.06em;
}
.data-row__title{font-weight:600;color:var(--paper);min-width:0}
.data-row__meta{
  font-family:var(--font-mono);
  font-size:12px;
  color:var(--steel);
  white-space:nowrap;
}
.panel--paper .data-row,.section--paper .data-row{border-bottom-color:rgba(11,24,54,.12)}
.panel--paper .data-row__title,.section--paper .data-row__title{color:var(--ink-text)}

/* ---------- 折叠 ---------- */
.fold{border-top:1px solid var(--line-soft)}
.fold__head{
  display:flex;
  width:100%;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  padding:18px 4px;
  text-align:left;
  color:var(--paper);
  font-weight:600;
  transition:color .22s var(--ease);
}
.fold__head:hover{color:var(--cyan)}
.fold__sign{
  font-family:var(--font-mono);
  font-size:18px;
  line-height:1;
  color:var(--cyan);
  transition:transform .26s var(--ease);
}
.fold__head[aria-expanded="true"] .fold__sign{transform:rotate(45deg)}
.fold__body{padding:0 4px 22px;color:var(--steel)}
.fold__body[hidden]{display:none}

/* ---------- 标签页 / 筛选 ---------- */
.tabs{
  display:inline-flex;
  flex-wrap:wrap;
  gap:6px;
  padding:6px;
  border:1px solid var(--line-soft);
  border-radius:999px;
  background:rgba(16,31,66,.65);
  align-self:flex-start;
}
.tabs__btn{
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.1em;
  padding:8px 16px;
  border-radius:999px;
  color:var(--steel);
  transition:background-color .22s var(--ease),color .22s var(--ease);
}
.tabs__btn:hover{color:var(--paper)}
.tabs__btn[aria-selected="true"]{background:var(--cyan);color:var(--deep);font-weight:700}

.filter-bar{
  display:flex;
  flex-wrap:wrap;
  align-items:flex-end;
  gap:14px 20px;
}
.filter-bar__field{display:flex;flex-direction:column;gap:8px;min-width:170px}
.filter-bar__label{
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.14em;
  text-transform:uppercase;
  color:var(--steel);
}

/* ---------- 图片容器 ---------- */
.media{
  position:relative;
  display:block;
  overflow:hidden;
  isolation:isolate;
  border-radius:var(--r-md);
  aspect-ratio:16 / 9;
  background-image:linear-gradient(136deg, rgba(25,224,210,.20), rgba(16,31,66,.92) 58%, rgba(245,197,66,.16));
  background-color:var(--bg-panel);
}
.media::after{
  content:"";
  position:absolute;
  left:0;right:0;bottom:0;
  height:54%;
  z-index:1;
  pointer-events:none;
  background:linear-gradient(180deg,transparent,rgba(5,10,24,.74));
}
.media > img,
.media > video,
.media > svg{
  width:100%;
  height:100%;
  object-fit:cover;
}
.media--tall{aspect-ratio:4 / 5}
.media--square{aspect-ratio:1 / 1}
.media--wide{aspect-ratio:21 / 9}
.media--diagonal{clip-path:polygon(0 0,100% 0,100% 82%,0 100%)}
.media--reel .media__tag{opacity:.74;transform:none}
.media--reel:hover .media__tag,
.media--reel:focus-within .media__tag{opacity:1;transform:translateY(-2px)}
.media__tag{
  position:absolute;
  left:14px;
  bottom:14px;
  z-index:2;
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.12em;
  color:var(--paper);
  background:rgba(5,10,24,.74);
  padding:5px 11px;
  border-radius:var(--r-xs);
  backdrop-filter:blur(6px);
  -webkit-backdrop-filter:blur(6px);
  transition:opacity .26s var(--ease),transform .26s var(--ease);
}
.media__tag--signal{background:var(--signal);color:var(--deep)}
.media__tag--cyan{background:var(--cyan);color:var(--deep)}

/* ---------- 显现 ---------- */
.js-ready [data-reveal]{
  opacity:0;
  transform:translateY(14px);
  transition:opacity .55s var(--ease),transform .55s var(--ease);
}
.js-ready [data-reveal][data-visible]{
  opacity:1;
  transform:none;
}

/* ---------- 跳转链 ---------- */
.skip-link{
  position:fixed;
  top:0;
  left:16px;
  z-index:200;
  display:inline-block;
  padding:12px 22px;
  background:var(--signal);
  color:var(--deep);
  font-size:14px;
  font-weight:700;
  text-decoration:none;
  border-radius:0 0 var(--r-sm) var(--r-sm);
  transform:translateY(-140%);
  transition:transform .22s var(--ease);
}
.skip-link:focus{transform:translateY(0)}

/* ---------- 页头 ---------- */
.site-header{
  position:sticky;
  top:0;
  z-index:120;
  background:rgba(11,24,54,.9);
  border-bottom:1px solid var(--line);
  backdrop-filter:blur(16px) saturate(140%);
  -webkit-backdrop-filter:blur(16px) saturate(140%);
}
.site-header::before{
  content:"";
  position:absolute;
  top:0;left:0;right:0;
  height:2px;
  background:linear-gradient(90deg,var(--cyan),rgba(25,224,210,0) 46%,rgba(245,197,66,0) 54%,var(--signal));
}
.header-inner{position:relative}

.masthead{
  display:grid;
  grid-template-columns:minmax(0,1fr) auto minmax(0,1fr);
  align-items:center;
  gap:18px;
  padding:20px 0 12px;
}
.masthead__side{display:flex;min-width:0}
.masthead__side--left{
  flex-direction:column;
  align-items:flex-start;
  gap:7px;
}
.masthead__side--right{
  flex-direction:row;
  align-items:center;
  justify-content:flex-end;
  flex-wrap:wrap;
  gap:8px 18px;
}
.masthead__kicker{
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.22em;
  text-transform:uppercase;
  color:var(--steel);
}

.round-chip{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-family:var(--font-mono);
  font-size:12px;
  font-weight:700;
  letter-spacing:.08em;
  color:var(--cyan);
  background:var(--glass);
  border:1px solid rgba(25,224,210,.4);
  border-radius:999px;
  padding:4px 12px 4px 10px;
  line-height:1.6;
}
.round-chip__dot{
  width:7px;
  height:7px;
  flex:none;
  border-radius:50%;
  background:var(--cyan);
  box-shadow:0 0 0 3px rgba(25,224,210,.18);
  animation:chipPulse 2.8s var(--ease) infinite;
}
@keyframes chipPulse{
  0%,100%{opacity:1}
  50%{opacity:.42}
}

.brand{
  display:flex;
  flex-direction:column;
  align-items:center;
  gap:3px;
  padding:4px 12px;
  text-decoration:none;
  color:var(--paper);
}
.brand__name{
  font-family:var(--font-display);
  font-size:clamp(21px,2.6vw,30px);
  font-weight:900;
  font-stretch:condensed;
  letter-spacing:.14em;
  text-indent:.14em;
  line-height:1.14;
  transition:color .22s var(--ease);
}
.brand__sub{
  font-family:var(--font-mono);
  font-size:10px;
  letter-spacing:.34em;
  text-indent:.34em;
  text-transform:uppercase;
  color:var(--steel);
  transition:color .22s var(--ease);
}
.brand:hover .brand__name{color:var(--cyan)}
.brand:hover .brand__sub{color:var(--paper)}

.utility-link{
  position:relative;
  font-size:13px;
  letter-spacing:.06em;
  color:var(--steel);
  padding:4px 0 4px 14px;
  transition:color .22s var(--ease);
}
.utility-link::before{
  content:"";
  position:absolute;
  left:0;
  top:50%;
  width:6px;
  height:6px;
  margin-top:-3px;
  border-radius:1px;
  background:var(--cyan);
  transition:background-color .22s var(--ease);
}
.utility-link:hover{color:var(--paper)}
.utility-link:hover::before{background:var(--signal)}

.nav-toggle{
  display:none;
  position:absolute;
  top:12px;
  right:var(--gutter);
  align-items:center;
  gap:10px;
  padding:9px 15px;
  border:1px solid var(--line);
  border-radius:999px;
  background:rgba(16,31,66,.72);
  color:var(--paper);
  font-size:13px;
  letter-spacing:.08em;
  transition:border-color .22s var(--ease),color .22s var(--ease);
}
.nav-toggle:hover{border-color:var(--cyan);color:var(--cyan)}
.nav-toggle__bars{
  display:inline-flex;
  flex-direction:column;
  gap:3px;
  width:16px;
  flex:none;
}
.nav-toggle__bars i{
  display:block;
  height:2px;
  border-radius:1px;
  background:currentColor;
  transition:transform .24s var(--ease),opacity .24s var(--ease);
}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars i:nth-child(1){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:nth-child(3){transform:translateY(-5px) rotate(-45deg)}
.nav-toggle__label{white-space:nowrap}

.site-nav{border-top:1px solid var(--line-soft)}
.site-nav__list{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:center;
  gap:0 clamp(4px,2vw,30px);
}
.site-nav__list > li{display:flex}
.site-nav__list a{
  position:relative;
  display:block;
  padding:14px 4px;
  font-size:14px;
  letter-spacing:.06em;
  color:var(--steel);
  transition:color .22s var(--ease);
}
.site-nav__list a::after{
  content:"";
  position:absolute;
  left:4px;
  right:4px;
  bottom:8px;
  height:2px;
  background:var(--cyan);
  transform:scaleX(0);
  transform-origin:left center;
  transition:transform .3s var(--ease),background-color .22s var(--ease);
}
.site-nav__list a:hover{color:var(--paper)}
.site-nav__list a:hover::after{transform:scaleX(1)}
.site-nav__list a[aria-current="page"]{color:var(--paper);font-weight:700}
.site-nav__list a[aria-current="page"]::after{transform:scaleX(1);background:var(--signal)}

.scroll-meter{
  position:absolute;
  left:0;
  right:0;
  bottom:-1px;
  height:2px;
  pointer-events:none;
}
.scroll-meter__fill{
  display:block;
  height:100%;
  width:100%;
  background:linear-gradient(90deg,var(--cyan),var(--signal));
  transform:scaleX(0);
  transform-origin:0 50%;
  transition:transform .12s linear;
}

/* ---------- 页脚 ---------- */
.site-footer{
  position:relative;
  margin-top:clamp(56px,8vw,120px);
  padding:clamp(40px,5vw,72px) 0 32px;
  background:var(--bg-panel);
  border-top:1px solid var(--line);
}
.site-footer::before{
  content:"";
  position:absolute;
  top:-1px;
  left:0;
  width:min(260px,42%);
  height:3px;
  background:var(--signal);
}

.footer-sign{
  display:flex;
  flex-wrap:wrap;
  align-items:baseline;
  justify-content:space-between;
  gap:12px 24px;
  padding-bottom:26px;
  margin-bottom:clamp(24px,3vw,42px);
  border-bottom:1px solid var(--line-soft);
}
.footer-sign__mark{
  font-family:var(--font-display);
  font-size:clamp(28px,4vw,46px);
  font-weight:900;
  font-stretch:condensed;
  letter-spacing:.16em;
  line-height:1;
  color:var(--paper);
}
.footer-sign__region{
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.2em;
  text-transform:uppercase;
  color:var(--steel);
}

.footer-grid{
  display:grid;
  grid-template-columns:minmax(0,1.6fr) minmax(0,1fr) minmax(0,1fr) minmax(0,1.3fr);
  gap:clamp(24px,3vw,48px);
}
.footer-col{min-width:0}
.footer-heading{
  margin:0 0 14px;
  font-family:var(--font-mono);
  font-size:11px;
  font-weight:700;
  letter-spacing:.2em;
  text-transform:uppercase;
  color:var(--cyan);
}
.footer-text{
  margin:0 0 16px;
  max-width:38ch;
  font-size:15px;
  color:var(--steel);
}
.footer-stamp{
  display:inline-flex;
  align-items:center;
  gap:8px;
  margin:0;
  padding:4px 11px;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.08em;
  color:var(--signal);
  border:1px dashed rgba(245,197,66,.45);
  border-radius:var(--r-xs);
}
.footer-list{display:flex;flex-direction:column;gap:10px}
.footer-list a{
  align-self:flex-start;
  font-size:15px;
  color:var(--steel);
  border-bottom:1px solid transparent;
  transition:color .22s var(--ease),border-color .22s var(--ease);
}
.footer-list a:hover{color:var(--cyan);border-color:var(--cyan)}

.contact-row{display:flex;flex-direction:column;gap:3px}
.contact-row__label{
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.16em;
  text-transform:uppercase;
  color:var(--steel);
}
.contact-row__value{
  font-size:15px;
  color:var(--paper);
  word-break:break-all;
}
.contact-row__value--mono{
  font-family:var(--font-mono);
  font-variant-numeric:tabular-nums;
  letter-spacing:.04em;
}
.copy-btn{
  align-self:flex-start;
  margin-top:8px;
  padding:6px 14px;
  font-size:12px;
  letter-spacing:.08em;
  font-weight:700;
  color:var(--deep);
  background:var(--cyan);
  border-radius:999px;
  transition:background-color .22s var(--ease),transform .22s var(--ease);
}
.copy-btn:hover{background:#5CF2E7;transform:translateY(-1px)}
.copy-btn[data-copied]{background:var(--signal)}

.footer-base{
  display:flex;
  flex-wrap:wrap;
  justify-content:space-between;
  gap:10px 24px;
  margin-top:clamp(28px,4vw,48px);
  padding-top:20px;
  border-top:1px solid var(--line-soft);
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.06em;
  color:var(--steel);
}
.footer-base p{margin:0}

/* ---------- 浮动入口 ---------- */
.feedback-dock{
  position:fixed;
  right:clamp(14px,2vw,26px);
  bottom:clamp(14px,2vw,26px);
  z-index:110;
  display:inline-flex;
  align-items:center;
  gap:9px;
  padding:11px 18px;
  font-size:13px;
  font-weight:700;
  letter-spacing:.08em;
  color:var(--deep);
  background:var(--signal);
  border-radius:999px;
  box-shadow:0 12px 30px rgba(5,10,24,.5);
  transition:transform .22s var(--ease),box-shadow .22s var(--ease);
}
.feedback-dock::before{
  content:"";
  width:8px;
  height:8px;
  flex:none;
  border-radius:50%;
  background:var(--card-red);
}
.feedback-dock:hover{transform:translateY(-2px);box-shadow:0 16px 34px rgba(5,10,24,.62)}

.to-top{
  position:fixed;
  right:clamp(14px,2vw,26px);
  bottom:calc(clamp(14px,2vw,26px) + 56px);
  z-index:109;
  display:inline-flex;
  align-items:center;
  justify-content:center;
  width:42px;
  height:42px;
  font-size:15px;
  line-height:1;
  color:var(--cyan);
  background:rgba(11,24,54,.88);
  border:1px solid rgba(25,224,210,.4);
  border-radius:50%;
  backdrop-filter:blur(10px);
  -webkit-backdrop-filter:blur(10px);
  opacity:0;
  visibility:hidden;
  transform:translateY(8px);
  transition:opacity .24s var(--ease),transform .24s var(--ease),visibility .24s,background-color .22s var(--ease),color .22s var(--ease);
}
.to-top[data-show]{opacity:1;visibility:visible;transform:none}
.to-top:hover{background:var(--cyan);color:var(--deep)}

/* ---------- 响应式 ---------- */
@media (max-width:1080px){
  .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
}

@media (max-width:960px){
  .grid--2,.grid--3,.grid--4,
  .grid--asym,.grid--asym-alt,.grid--5-7{grid-template-columns:minmax(0,1fr)}
  .grid--3 > *, .grid--4 > *{min-width:0}
}

@media (max-width:880px){
  .masthead{
    grid-template-columns:minmax(0,1fr);
    justify-items:center;
    gap:10px;
    padding:26px 0 14px;
  }
  .masthead__side--left{align-items:center}
  .masthead__side--right{display:none}
  .nav-toggle{display:inline-flex}

  .site-nav{
    display:none;
    margin:0 calc(var(--gutter) * -1);
    padding:0 var(--gutter);
    border-top:1px solid var(--line);
    background:rgba(16,31,66,.96);
  }
  .site-nav[data-open]{
    display:block;
    animation:navReveal .26s var(--ease);
  }
  .site-nav__list{
    flex-direction:column;
    align-items:stretch;
    gap:0;
    padding:6px 0 14px;
  }
  .site-nav__list a{
    padding:14px 4px;
    font-size:16px;
    border-bottom:1px solid var(--line-soft);
  }
  .site-nav__list a::after{display:none}
  .site-nav__list a[aria-current="page"]{color:var(--signal)}
  @keyframes navReveal{
    from{opacity:0;transform:translateY(-6px)}
    to{opacity:1;transform:none}
  }
}

@media (max-width:900px){
  body{background-attachment:scroll}
}

@media (max-width:600px){
  :root{--gutter:18px}
  .footer-grid{grid-template-columns:minmax(0,1fr)}
  .footer-sign__mark{letter-spacing:.1em}
  .footer-sign__region{letter-spacing:.14em}
  .data-row{grid-template-columns:auto minmax(0,1fr);row-gap:4px}
  .data-row__meta{grid-column:2}
  .feedback-dock{padding:10px 15px;font-size:12px}
}

/* ---------- 可访问性 ---------- */
@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;
  }
  .js-ready [data-reveal]{opacity:1;transform:none}
  .scroll-meter__fill{transition:none}
}