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

:root{
  --ink:#061428;
  --ink-2:#0B2340;
  --panel:#123A63;
  --line:#1E5B8C;
  --line-soft:rgba(30,91,140,.55);
  --cyan:#00E5D0;
  --cyan-soft:#7FF5EA;
  --cyan-wash:rgba(0,229,208,.08);
  --gold:#F5B942;
  --magenta:#E0409A;
  --text:#E9F1FA;
  --muted:#8FA9C4;
  --paper:#F7FAFD;
  --radius:2px;
  --container:1320px;
  --gutter:clamp(16px,3vw,64px);
  --step:20px;
  --ease:cubic-bezier(.2,.7,.3,1);
  --t-fast:180ms;
  --t-slow:320ms;
  --font-display:"Source Han Sans SC","Noto Sans SC","PingFang SC","Microsoft YaHei",system-ui,sans-serif;
  --font-body:"Noto Sans SC","PingFang SC","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  --font-mono:"JetBrains Mono","Roboto Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
}

html{-webkit-text-size-adjust:100%}

body{
  margin:0;
  background-color:var(--ink);
  color:var(--text);
  font-family:var(--font-body);
  font-size:16px;
  font-weight:400;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
}

@media (min-width:900px){
  body{
    background-image:linear-gradient(90deg,rgba(30,91,140,.14) 1px,transparent 1px);
    background-size:calc(100% / 12) 100%;
  }
}

main{display:block}
#main-content{scroll-margin-top:140px}

h1,h2,h3,h4{
  font-family:var(--font-display);
  font-weight:800;
  letter-spacing:-.02em;
  line-height:1.18;
  margin:0 0 .55em;
}
h1{font-size:clamp(32px,4.4vw,56px)}
h2{font-size:clamp(24px,2.6vw,34px)}
h3{font-size:20px;font-weight:700;letter-spacing:.01em}
h4{font-size:16px;font-weight:700;letter-spacing:.02em}
p{margin:0 0 1em}
ul,ol{margin:0 0 1em;padding-left:1.2em}

a{color:var(--cyan-soft);text-decoration:none;transition:color var(--t-fast) var(--ease),border-color var(--t-fast) var(--ease),background-color var(--t-fast) var(--ease)}
a:hover{color:var(--cyan)}

img,svg{display:block;max-width:100%}
button{font:inherit}

::selection{background:var(--cyan);color:#04121f}
:focus-visible{outline:2px solid var(--cyan);outline-offset:2px}

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

.skip-link{
  position:fixed;top:10px;left:10px;z-index:200;
  transform:translateY(-180%);
  background:var(--cyan);color:#04121f;
  padding:10px 16px;font-size:14px;font-weight:700;
  border-radius:var(--radius);
  transition:transform var(--t-fast) var(--ease);
}
.skip-link:focus{transform:translateY(0);color:#04121f}

/* ---------- 布局基础 ---------- */
.container{
  width:100%;max-width:var(--container);
  margin:0 auto;padding-left:var(--gutter);padding-right:var(--gutter);
}

.section{padding:clamp(36px,5.5vw,76px) 0;border-top:1px solid var(--line-soft)}
.section:first-of-type{border-top:0}
.section__head{
  display:flex;align-items:flex-end;justify-content:space-between;
  gap:20px;flex-wrap:wrap;margin-bottom:24px;
}

.grid{display:grid;gap:var(--step)}
.grid--12{grid-template-columns:repeat(12,minmax(0,1fr))}
.grid--auto{grid-template-columns:repeat(auto-fit,minmax(240px,1fr))}
.span-2{grid-column:span 2}
.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-10{grid-column:span 10}
.span-12{grid-column:span 12}

.stack{display:flex;flex-direction:column;gap:14px}
.row{display:flex;flex-wrap:wrap;align-items:center;gap:12px}
.rule{height:1px;background:var(--line-soft);border:0;margin:26px 0}

/* ---------- 文字工具 ---------- */
.eyebrow{
  font-family:var(--font-mono);font-size:12px;font-weight:500;
  letter-spacing:.16em;text-transform:uppercase;
  color:var(--cyan);margin:0 0 12px;
}
.lead{font-size:18px;line-height:1.7;color:var(--muted);max-width:34em}
.num{font-family:var(--font-mono);color:var(--gold);letter-spacing:.02em}

.prose{max-width:40em;font-size:16px;line-height:1.75;color:var(--text)}
.prose h2,.prose h3{margin-top:1.6em}
.prose ul,.prose ol{padding-left:1.1em}
.prose li{margin-bottom:.4em}
.prose strong{color:var(--cyan-soft)}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:10px 16px;border:1px solid var(--line);border-radius:var(--radius);
  background:var(--ink-2);color:var(--text);
  font-size:14px;font-weight:700;letter-spacing:.01em;
  cursor:pointer;white-space:nowrap;text-decoration:none;
  transition:background-color var(--t-fast) var(--ease),border-color var(--t-fast) var(--ease),color var(--t-fast) var(--ease);
}
.btn:hover{background:var(--panel);border-color:var(--cyan);color:var(--text)}
.btn--primary{background:var(--cyan);border-color:var(--cyan);color:#04121f}
.btn--primary:hover{background:var(--cyan-soft);border-color:var(--cyan-soft);color:#04121f}
.btn--ghost{background:transparent;color:var(--muted)}
.btn--ghost:hover{background:var(--ink-2);color:var(--text);border-color:var(--cyan)}
.btn--sm{padding:7px 12px;font-size:13px}
.btn.is-copied{border-color:var(--magenta);color:var(--magenta)}
.btn--primary.is-copied{border-color:var(--magenta);color:var(--magenta);background:transparent}

/* ---------- 头部命令栏 ---------- */
.site-header{
  position:sticky;top:0;z-index:80;
  background:rgba(6,20,40,.94);
  border-bottom:1px solid var(--line);
  -webkit-backdrop-filter:blur(8px);
  backdrop-filter:blur(8px);
}
.progress{
  position:absolute;left:0;right:0;bottom:-1px;height:2px;
  overflow:hidden;pointer-events:none;z-index:2;
}
.progress__bar{
  display:block;height:100%;width:0;
  background:linear-gradient(90deg,var(--cyan),var(--gold));
  transition:width 120ms linear;
}
.header-inner{position:static}
.header-top{
  display:flex;align-items:center;gap:16px;
  padding:11px 0;flex-wrap:nowrap;
}
.brand{
  display:flex;flex-direction:column;gap:3px;
  padding:2px 0;color:var(--text);flex:0 0 auto;
}
.brand__mark{
  font-family:var(--font-display);font-weight:900;
  font-size:20px;line-height:1;letter-spacing:-.02em;color:var(--text);
  transition:color var(--t-fast) var(--ease);
}
.brand__tag{
  font-family:var(--font-mono);font-size:11px;font-weight:500;
  letter-spacing:.08em;line-height:1;color:var(--muted);
}
.brand:hover .brand__mark{color:var(--cyan)}

.status{
  display:inline-flex;align-items:center;gap:8px;
  margin:0;padding:6px 10px;
  border:1px solid var(--line);border-radius:var(--radius);
  background:var(--ink-2);
  font-family:var(--font-mono);font-size:12px;color:var(--muted);
  white-space:nowrap;flex:0 0 auto;
}
.status__dot{
  width:8px;height:8px;border-radius:50%;background:var(--cyan);
  box-shadow:0 0 0 3px var(--cyan-wash);
  animation:breathe 2.6s var(--ease) infinite;
}
@keyframes breathe{
  0%,100%{box-shadow:0 0 0 3px rgba(0,229,208,.18)}
  50%{box-shadow:0 0 0 7px rgba(0,229,208,.04)}
}
.status__text{color:var(--muted)}

.toolbar{display:flex;align-items:center;gap:10px;margin-left:auto;min-width:0}
.toolbar__desk{white-space:nowrap}

.search{position:relative;min-width:0}
.search__input{
  width:clamp(150px,17vw,250px);
  padding:8px 10px;
  background:var(--ink-2);color:var(--text);
  border:1px solid var(--line);border-radius:var(--radius);
  font-family:var(--font-body);font-size:13px;
  -webkit-appearance:none;appearance:none;
  transition:border-color var(--t-fast) var(--ease),background-color var(--t-fast) var(--ease);
}
.search__input::placeholder{color:var(--muted)}
.search__input:focus{outline:none;border-color:var(--cyan);background:var(--panel)}
.search__input:focus-visible{outline:2px solid var(--cyan);outline-offset:2px}

.nav-toggle{
  display:none;flex:0 0 auto;
  width:42px;height:38px;padding:0 10px;
  flex-direction:column;justify-content:center;gap:4px;
  background:var(--ink-2);border:1px solid var(--line);
  border-radius:var(--radius);cursor:pointer;
}
.nav-toggle__bar{
  display:block;height:2px;width:100%;background:var(--cyan);
  transition:transform var(--t-fast) var(--ease),opacity var(--t-fast) var(--ease);
}
.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-of-type(1){transform:translateY(6px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-of-type(2){opacity:0}
.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-of-type(3){transform:translateY(-6px) rotate(-45deg)}

.nav{border-top:1px solid var(--line-soft)}
.nav__list{
  display:flex;align-items:stretch;gap:2px;
  list-style:none;margin:0;padding:0;
  overflow-x:auto;scrollbar-width:thin;
}
.nav__item{flex:0 0 auto}
.nav__link{
  display:inline-flex;align-items:baseline;gap:7px;
  padding:11px 14px;
  font-size:14px;font-weight:700;color:var(--muted);
  border-bottom:2px solid transparent;
  transition:color var(--t-fast) var(--ease),background-color var(--t-fast) var(--ease),border-color var(--t-fast) var(--ease);
}
.nav__num{
  font-family:var(--font-mono);font-size:11px;font-weight:500;
  letter-spacing:.08em;color:var(--muted);opacity:.75;
  transition:color var(--t-fast) var(--ease);
}
.nav__link:hover{color:var(--text);background:var(--ink-2);border-bottom-color:var(--cyan-soft)}
.nav__link:hover .nav__num{color:var(--cyan);opacity:1}
.nav__link[aria-current="page"]{color:var(--text);border-bottom-color:var(--gold)}
.nav__link[aria-current="page"] .nav__num{color:var(--gold);opacity:1}
.nav__link.is-keyed{color:var(--cyan);border-bottom-color:var(--cyan);background:var(--ink-2)}

/* ---------- 页脚 ---------- */
.site-footer{
  position:relative;margin-top:0;
  background:var(--ink-2);
  border-top:1px solid var(--line);
}
.site-footer::before{
  content:"";position:absolute;top:-1px;left:0;right:0;height:2px;
  background:linear-gradient(90deg,var(--cyan) 0 34%,var(--gold) 34% 48%,transparent 48%);
}
.footer-grid{
  display:grid;grid-template-columns:1fr 1.5fr 1fr 1fr;
  border-top:1px solid var(--line-soft);
}
.footer-zone{
  position:relative;min-width:0;
  padding:28px 24px 34px;
  border-left:1px solid var(--line-soft);
}
.footer-zone:first-child{border-left:0;padding-left:0}
.footer-zone--wide{
  background:var(--panel);
  border-left-color:transparent;
}
.footer-zone--wide::before{
  content:"";position:absolute;top:0;left:0;right:0;height:2px;background:var(--cyan);
}
.footer-zone__title{
  font-family:var(--font-mono);font-size:12px;font-weight:500;
  letter-spacing:.14em;text-transform:uppercase;
  color:var(--gold);margin:0 0 14px;
}
.footer-facts{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:10px}
.footer-fact{display:flex;flex-direction:column;gap:2px;font-size:14px;line-height:1.6;color:var(--muted)}
.footer-fact__key{
  font-family:var(--font-mono);font-size:11px;letter-spacing:.1em;
  text-transform:uppercase;color:var(--muted);opacity:.7;
}
.footer-list{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:9px}
.footer-list__item{font-size:14px}
.footer-link{color:var(--muted);border-bottom:1px solid transparent;padding-bottom:1px}
.footer-link:hover{color:var(--cyan);border-bottom-color:var(--cyan)}
.footer-route{
  display:inline-flex;align-items:center;gap:8px;margin-top:14px;
  font-size:13px;font-weight:700;color:var(--cyan);
  border-bottom:1px solid transparent;padding-bottom:2px;
}
.footer-route::after{content:"→";font-family:var(--font-mono)}
.footer-route:hover{color:var(--cyan-soft);border-bottom-color:var(--cyan-soft)}
.footer-quick{
  list-style:none;margin:0;padding:0;
  display:grid;grid-template-columns:1fr 1fr;gap:8px 12px;
}
.footer-quick__link{
  display:flex;align-items:baseline;gap:8px;
  padding:8px 10px;
  border:1px solid rgba(30,91,140,.7);border-radius:var(--radius);
  background:rgba(6,20,40,.5);
  font-size:13px;color:var(--text);line-height:1.5;
  transition:border-color var(--t-fast) var(--ease),color var(--t-fast) var(--ease),background-color var(--t-fast) var(--ease);
}
.footer-quick__link:hover{border-color:var(--cyan);color:var(--cyan);background:var(--cyan-wash)}
.footer-quick__num{
  font-family:var(--font-mono);font-size:11px;color:var(--gold);
  transition:color var(--t-fast) var(--ease);
}
.footer-quick__link:hover .footer-quick__num{color:var(--cyan-soft)}
.footer-bottom{
  display:flex;align-items:center;justify-content:space-between;
  gap:14px;flex-wrap:wrap;
  border-top:1px solid var(--line-soft);
  padding:16px 0 26px;
}
.footer-bottom__meta{
  margin:0;font-family:var(--font-mono);font-size:12px;
  letter-spacing:.04em;color:var(--muted);
}
.back-to-top{
  display:inline-flex;align-items:center;gap:8px;
  padding:8px 14px;
  background:var(--ink);color:var(--text);
  border:1px solid var(--line);border-radius:var(--radius);
  font-size:13px;font-weight:700;cursor:pointer;
  transition:border-color var(--t-fast) var(--ease),color var(--t-fast) var(--ease);
}
.back-to-top:hover{border-color:var(--cyan);color:var(--cyan)}

/* ---------- 面包屑 ---------- */
.breadcrumbs{margin:0 0 22px}
.breadcrumbs__list{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px;
  list-style:none;margin:0;padding:0;
  font-family:var(--font-mono);font-size:12px;letter-spacing:.04em;
}
.breadcrumbs__item{display:inline-flex;align-items:center;gap:8px;color:var(--muted)}
.breadcrumbs__item + .breadcrumbs__item::before{content:"/";color:var(--line)}
.breadcrumbs__link{color:var(--muted)}
.breadcrumbs__link:hover{color:var(--cyan)}
.breadcrumbs__item[aria-current="page"]{color:var(--gold)}

/* ---------- 卡片 / 面板 / Bento ---------- */
.bento{
  display:grid;grid-template-columns:repeat(12,minmax(0,1fr));
  gap:1px;background:var(--line-soft);
  border:1px solid var(--line-soft);border-radius:var(--radius);
}
.bento > *{
  background:var(--ink-2);
  padding:20px;min-width:0;
}

.card{
  border:1px solid var(--line);border-radius:var(--radius);
  background:var(--ink-2);padding:18px;
  transition:border-color var(--t-fast) var(--ease),background-color var(--t-fast) var(--ease);
}
.card:hover,.card:focus-within{border-color:var(--cyan);background:var(--panel)}
.card__head{
  display:flex;align-items:center;justify-content:space-between;
  gap:12px;margin-bottom:10px;
}
.card__title{font-size:18px;font-weight:700;letter-spacing:.01em;margin:0}
.card__meta{font-family:var(--font-mono);font-size:12px;color:var(--muted);white-space:nowrap}

.panel{
  border:1px solid var(--line);border-radius:var(--radius);
  background:var(--panel);padding:20px;
}

.tag{
  display:inline-flex;align-items:center;gap:6px;
  padding:3px 8px;border:1px solid var(--line);border-radius:var(--radius);
  font-family:var(--font-mono);font-size:12px;font-weight:500;
  letter-spacing:.08em;color:var(--muted);white-space:nowrap;
}
.tag--gold{color:var(--gold);border-color:rgba(245,185,66,.55)}
.tag--cyan{color:var(--cyan);border-color:rgba(0,229,208,.55)}

.stat{display:flex;flex-direction:column;gap:4px;min-width:0}
.stat__value{
  font-family:var(--font-mono);font-weight:500;
  font-size:clamp(22px,2.4vw,30px);line-height:1.1;
  color:var(--gold);
  transition:transform var(--t-fast) var(--ease);
}
.stat__label{
  font-family:var(--font-mono);font-size:12px;letter-spacing:.06em;color:var(--muted);
}
.card:hover .stat__value{transform:translateY(-2px)}

/* ---------- 索引轨 ---------- */
.rail{
  position:sticky;top:132px;align-self:start;
  border-left:1px solid var(--line);padding-left:14px;
}
.rail__list{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:10px}
.rail__link{
  display:block;margin-left:-16px;padding-left:14px;
  border-left:2px solid transparent;
  font-family:var(--font-mono);font-size:13px;letter-spacing:.04em;
  color:var(--muted);
}
.rail__link:hover{color:var(--text)}
.rail__link.is-active{color:var(--gold);border-left-color:var(--gold)}

/* ---------- 图像容器（页面阶段放置图片） ---------- */
.media{
  position:relative;display:block;width:100%;overflow:hidden;
  background:var(--ink-2);
  border:1px solid var(--line);border-radius:var(--radius);
}
.media__img{display:block;width:100%;height:100%;object-fit:cover}
.media--16x9{aspect-ratio:16/9}
.media--4x3{aspect-ratio:4/3}
.media--3x2{aspect-ratio:3/2}
.media--1x1{aspect-ratio:1/1}
.media--21x9{aspect-ratio:21/9}
.media--tall{aspect-ratio:3/4}
.media--empty{
  background-image:
    linear-gradient(135deg,rgba(30,91,140,.40) 0 1px,transparent 1px),
    linear-gradient(90deg,rgba(0,229,208,.10),rgba(245,185,66,.10));
  background-size:14px 14px,100% 100%;
}

/* ---------- 筛选与显现 ---------- */
.filter-bar{
  display:flex;align-items:center;gap:12px;
  border:1px solid var(--line);border-radius:var(--radius);
  background:var(--ink-2);padding:10px 12px;
}
.filter-bar__input{
  flex:1;min-width:0;
  background:transparent;border:0;color:var(--text);
  font-family:var(--font-body);font-size:14px;
}
.filter-bar__input::placeholder{color:var(--muted)}
.filter-bar__input:focus{outline:none}
.filter-bar__input:focus-visible{outline:2px solid var(--cyan);outline-offset:2px}
.filter-status{
  font-family:var(--font-mono);font-size:12px;color:var(--muted);
  white-space:nowrap;
}
.is-filtered-out{display:none !important}
.filter-empty{
  display:none;padding:18px;
  border:1px dashed var(--line);border-radius:var(--radius);
  color:var(--muted);font-size:14px;
}
.filter-empty[data-visible="true"]{display:block}

.reveal{opacity:0;transform:translateY(10px);transition:opacity var(--t-slow) var(--ease),transform var(--t-slow) var(--ease)}
.reveal.is-visible{opacity:1;transform:none}

/* ---------- 响应式 ---------- */
@media (max-width:1100px){
  .search__input{width:clamp(140px,16vw,200px)}
  .rail{display:none}
  .span-7,.span-8,.span-9,.span-10{grid-column:span 12}
}

@media (max-width:900px){
  .search{display:none}
  .status{padding:5px 9px}
}

@media (max-width:860px){
  .toolbar__desk{display:none}
  .nav-toggle{display:inline-flex}
  .nav{
    position:absolute;top:100%;left:0;right:0;
    background:var(--ink);border-top:1px solid var(--line);
    box-shadow:0 20px 34px rgba(0,0,0,.5);
    opacity:0;visibility:hidden;transform:translateY(-8px);
    transition:opacity var(--t-fast) var(--ease),transform var(--t-fast) var(--ease),visibility var(--t-fast) var(--ease);
  }
  .nav[data-open="true"]{opacity:1;visibility:visible;transform:none}
  .nav__list{
    flex-direction:column;overflow:visible;
    padding:8px var(--gutter) 18px;
  }
  .nav__item{border-bottom:1px solid rgba(30,91,140,.5)}
  .nav__item:last-child{border-bottom:0}
  .nav__link{
    width:100%;padding:14px 0 14px 0;font-size:16px;
    border-bottom:0;border-left:2px solid transparent;
  }
  .nav__link:hover{border-bottom:0;border-left-color:var(--cyan-soft);background:transparent}
  .nav__link[aria-current="page"]{
    border-bottom-color:transparent;
    border-left-color:var(--gold);
    padding-left:12px;
  }
  .nav__link.is-keyed{border-left-color:var(--cyan);background:transparent}
  .span-2,.span-3,.span-4,.span-5,.span-6,.span-11{grid-column:span 12}
  .footer-grid{grid-template-columns:1fr 1fr}
  .footer-zone{padding:24px 18px 28px}
  .footer-zone:nth-child(odd){border-left:0;padding-left:0}
  .footer-zone--wide{background:var(--panel);border-left-color:transparent;padding-left:18px}
}

@media (max-width:620px){
  .brand__mark{font-size:18px}
  .brand__tag{font-size:10px;letter-spacing:.06em}
  .status__text{display:none}
  .status{padding:6px}
  .footer-grid{grid-template-columns:1fr}
  .footer-zone{border-left:0;padding:22px 0 26px}
  .footer-zone--wide{padding-left:16px;padding-right:16px}
  .footer-quick{grid-template-columns:1fr}
  .footer-bottom{justify-content:flex-start}
}

@media (max-width:640px){
  .media--21x9{aspect-ratio:16/9}
}

@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
    scroll-behavior:auto !important;
  }
  .reveal{opacity:1;transform:none}
  .status__dot{animation:none;box-shadow:0 0 0 3px var(--cyan-wash)}
}