:root{
  --ink-900:#0A1A2A;
  --ink-800:#12283C;
  --ink-700:#1E3D57;
  --paper-50:#F5F2EA;
  --paper-200:#DCD5C6;
  --signal-500:#FF6A13;
  --signal-700:#C2470A;
  --celadon-400:#79C6AE;
  --celadon-700:#2F7A66;
  --amber-400:#F0B33C;
  --mist-300:#C8D6E2;
  --white:#FFFFFF;

  --font-display:"Oswald","Barlow Condensed","Source Han Sans SC","PingFang SC","Noto Sans SC",sans-serif;
  --font-body:"Inter","PingFang SC","Noto Sans SC",system-ui,-apple-system,"Segoe UI",sans-serif;

  --line:2px solid var(--ink-700);
  --line-ink:2px solid var(--ink-900);
  --shadow-hard:4px 4px 0 0 #04101C;
  --shadow-hard-paper:4px 4px 0 0 var(--ink-900);
  --ease:cubic-bezier(0.2,0.7,0.2,1);
  --shell:1240px;
  --gutter:24px;
  --header-h:56px;
}

*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  background:var(--ink-900);
  color:var(--paper-50);
  font-family:var(--font-body);
  font-size:17px;
  line-height:1.85;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
main{display:block}
#main-content{scroll-margin-top:calc(var(--header-h) + 12px)}
img,svg,video{display:block;max-width:100%}
a{color:inherit}
button{font:inherit;color:inherit;background:none;border:0}
ul,ol{margin:0;padding:0}

h1,h2,h3,h4,h5{
  font-family:var(--font-display);
  font-weight:700;
  letter-spacing:-0.01em;
  line-height:1.05;
  color:var(--white);
  margin:0 0 .5em;
}
h1{font-size:clamp(44px,7vw,96px);line-height:1.02}
h2{font-size:clamp(32px,4.2vw,48px);line-height:1.1}
h3{font-size:clamp(24px,2.6vw,32px);line-height:1.2}
h4{font-size:20px;line-height:1.35}
p{margin:0 0 1.1em}
strong{color:var(--white);font-weight:700}

:focus-visible{outline:2px solid var(--signal-500);outline-offset:2px}

/* ---------- 通用壳 ---------- */
.container{
  width:100%;
  max-width:var(--shell);
  margin:0 auto;
  padding:0 var(--gutter);
}
.section{
  position:relative;
  padding:clamp(48px,7vw,88px) 0;
}
.section--paper{
  background:var(--paper-50);
  color:var(--ink-900);
  border-top:var(--line-ink);
  border-bottom:var(--line-ink);
}
.section--paper h1,
.section--paper h2,
.section--paper h3,
.section--paper h4{color:var(--ink-900)}
.section--paper .label{color:var(--celadon-700)}
.rule{
  height:2px;
  border:0;
  background:var(--ink-700);
  margin:0;
}
.label{
  display:inline-block;
  font-family:var(--font-body);
  font-size:11px;
  font-weight:700;
  line-height:1.4;
  letter-spacing:.16em;
  text-transform:uppercase;
  color:var(--mist-300);
}
.num{
  display:block;
  font-family:var(--font-display);
  font-weight:700;
  font-variant-numeric:tabular-nums;
  font-size:clamp(72px,10vw,120px);
  line-height:.85;
  letter-spacing:-.02em;
  color:var(--signal-500);
}
.num--muted{color:rgba(255,255,255,.18)}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  padding:12px 20px;
  font-family:var(--font-display);
  font-weight:700;
  font-size:15px;
  line-height:1;
  letter-spacing:.04em;
  text-decoration:none;
  color:var(--paper-50);
  background:var(--ink-800);
  border:var(--line);
  box-shadow:var(--shadow-hard);
  cursor:pointer;
  transition:transform .18s var(--ease),box-shadow .18s var(--ease),background-color .18s var(--ease),color .18s var(--ease),border-color .18s var(--ease);
}
.btn:hover{
  transform:translate(-2px,-2px);
  box-shadow:6px 6px 0 0 #04101C;
}
.btn:active{
  transform:translate(2px,2px);
  box-shadow:1px 1px 0 0 #04101C;
}
.btn-signal{
  background:var(--signal-500);
  color:var(--ink-900);
  border-color:var(--signal-700);
}
.btn-signal:hover{background:#ff7d31}
.btn-ghost{
  background:transparent;
  color:var(--paper-50);
  border-color:var(--mist-300);
}
.btn-ghost:hover{background:var(--ink-800);color:var(--white);border-color:var(--celadon-400)}
.btn-paper{
  background:var(--paper-50);
  color:var(--ink-900);
  border-color:var(--ink-900);
  box-shadow:var(--shadow-hard-paper);
}
.btn-paper:hover{box-shadow:6px 6px 0 0 var(--ink-900)}
.btn-block{width:100%}

/* ---------- 头部：命令栏 ---------- */
.site-header{
  position:sticky;
  top:0;
  z-index:100;
  background:var(--ink-900);
  border-bottom:var(--line);
}
.skip-link{
  position:absolute;
  left:12px;
  top:-72px;
  z-index:200;
  padding:12px 20px;
  background:var(--signal-500);
  color:var(--ink-900);
  font-family:var(--font-display);
  font-size:14px;
  font-weight:700;
  letter-spacing:.08em;
  text-decoration:none;
  border:var(--line-ink);
  box-shadow:var(--shadow-hard);
  transition:top .18s var(--ease);
}
.skip-link:focus{top:10px}
.header-progress{
  position:absolute;
  left:0;
  right:0;
  bottom:-2px;
  height:2px;
  overflow:hidden;
  pointer-events:none;
  z-index:2;
}
.header-progress span{
  display:block;
  width:100%;
  height:100%;
  background:var(--signal-500);
  transform:scaleX(0);
  transform-origin:0 50%;
  transition:transform .12s linear;
}
.cmd-bar{background:transparent}
.cmd-inner{
  position:relative;
  display:flex;
  align-items:center;
  gap:16px;
  max-width:var(--shell);
  min-height:var(--header-h);
  margin:0 auto;
  padding:0 var(--gutter);
}
.brand{
  display:inline-flex;
  align-items:center;
  gap:12px;
  flex:0 0 auto;
  padding:8px 0;
  text-decoration:none;
  color:var(--paper-50);
}
.brand-mark{
  display:block;
  flex:0 0 auto;
  width:8px;
  height:26px;
  background:var(--signal-500);
  box-shadow:12px 0 0 0 var(--celadon-400);
}
.brand-text{
  display:flex;
  flex-direction:column;
  gap:2px;
  line-height:1.1;
}
.brand-name{
  font-family:var(--font-display);
  font-size:17px;
  font-weight:700;
  letter-spacing:.02em;
  color:var(--white);
  white-space:nowrap;
}
.brand-note{
  font-size:10px;
  letter-spacing:.16em;
  text-transform:uppercase;
  color:var(--mist-300);
  white-space:nowrap;
}
.nav-toggle{
  display:none;
  align-items:center;
  gap:8px;
  margin-left:auto;
  padding:9px 12px;
  background:var(--ink-800);
  border:var(--line);
  color:var(--paper-50);
  font-family:var(--font-display);
  font-size:12px;
  font-weight:700;
  letter-spacing:.14em;
  text-transform:uppercase;
  cursor:pointer;
}
.nav-toggle-bars{
  position:relative;
  display:block;
  width:16px;
  height:2px;
  background:var(--signal-500);
}
.nav-toggle-bars::before,
.nav-toggle-bars::after{
  content:"";
  position:absolute;
  left:0;
  width:16px;
  height:2px;
  background:var(--signal-500);
  transition:transform .2s var(--ease);
}
.nav-toggle-bars::before{top:-5px}
.nav-toggle-bars::after{top:5px}
.nav-toggle[aria-expanded="true"] .nav-toggle-bars::before{transform:translateY(5px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] .nav-toggle-bars::after{transform:translateY(-5px) rotate(-45deg)}
.site-nav{margin-left:auto}
.nav-list{
  display:flex;
  align-items:stretch;
  gap:0;
  list-style:none;
}
.nav-item{display:flex}
.nav-link{
  display:inline-flex;
  align-items:center;
  gap:7px;
  height:var(--header-h);
  padding:0 11px;
  font-size:14px;
  line-height:1;
  color:var(--mist-300);
  text-decoration:none;
  border-bottom:3px solid transparent;
  transition:color .18s var(--ease),background-color .18s var(--ease),border-color .18s var(--ease);
}
.nav-index{
  font-family:var(--font-display);
  font-size:11px;
  letter-spacing:.1em;
  color:var(--mist-300);
  opacity:.5;
  transition:color .18s var(--ease),opacity .18s var(--ease);
}
.nav-label{white-space:nowrap}
.nav-link:hover{
  color:var(--white);
  background:var(--ink-800);
  border-bottom-color:var(--ink-700);
}
.nav-link:hover .nav-index{color:var(--celadon-400);opacity:1}
.nav-link[aria-current="page"]{
  color:var(--white);
  background:var(--ink-800);
  border-bottom-color:var(--signal-500);
}
.nav-link[aria-current="page"] .nav-index{
  color:var(--signal-500);
  opacity:1;
}
.nav-extra{display:none}
.nav-extra-status{
  display:flex;
  align-items:center;
  gap:8px;
  margin:0 0 8px;
  font-size:12px;
  letter-spacing:.08em;
  color:var(--celadon-400);
}
.cmd-status{
  display:flex;
  align-items:center;
  gap:8px;
  flex:0 0 auto;
  padding:7px 11px;
  background:var(--ink-800);
  border:var(--line);
}
.status-dot{
  display:block;
  width:8px;
  height:8px;
  border-radius:50%;
  background:var(--celadon-400);
  box-shadow:0 0 0 4px rgba(121,198,174,.16);
  animation:breathe 2.4s ease-in-out infinite;
}
.status-text{
  font-size:12px;
  line-height:1;
  letter-spacing:.08em;
  color:var(--celadon-400);
  white-space:nowrap;
}
.cmd-cta{
  flex:0 0 auto;
  padding:10px 16px;
  font-size:13px;
}
@keyframes breathe{
  0%,100%{opacity:1}
  50%{opacity:.55}
}

/* ---------- 页脚 ---------- */
.site-footer{
  background:var(--ink-900);
  color:var(--mist-300);
  border-top:var(--line);
}
.footer-inner{
  max-width:var(--shell);
  margin:0 auto;
  padding:0 var(--gutter);
}
.footer-top{
  display:grid;
  grid-template-columns:minmax(200px,1fr) 2fr;
  gap:clamp(24px,4vw,56px);
  padding:clamp(40px,6vw,72px) 0 40px;
  border-bottom:var(--line);
}
.footer-brand{
  display:flex;
  flex-direction:column;
  align-items:flex-start;
  gap:12px;
}
.footer-brand-name{
  margin:0;
  font-family:var(--font-display);
  font-size:clamp(28px,3vw,36px);
  line-height:1;
  letter-spacing:-0.01em;
  color:var(--white);
}
.footer-brand-note{
  margin:0;
  font-size:11px;
  letter-spacing:.16em;
  text-transform:uppercase;
  color:var(--mist-300);
}
.footer-cols{
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  gap:20px 24px;
}
.footer-col-title{
  margin:0 0 12px;
  padding-bottom:10px;
  border-bottom:1px solid var(--ink-700);
  font-family:var(--font-body);
  font-size:11px;
  font-weight:700;
  letter-spacing:.16em;
  text-transform:uppercase;
  color:var(--mist-300);
}
.footer-list{list-style:none}
.footer-link{
  display:inline-block;
  padding:5px 0;
  font-size:15px;
  color:var(--paper-50);
  text-decoration:none;
  border-bottom:1px solid transparent;
  transition:color .18s var(--ease),border-color .18s var(--ease);
}
.footer-link:hover{
  color:var(--signal-500);
  border-bottom-color:var(--signal-500);
}
.footer-contact{
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  gap:16px;
  padding:32px 0;
  border-bottom:var(--line);
}
.contact-item{
  padding:16px 18px;
  background:var(--ink-800);
  border:var(--line);
  box-shadow:var(--shadow-hard);
}
.contact-item--note{grid-column:1 / -1}
.contact-label{
  margin:0 0 6px;
  font-size:11px;
  font-weight:700;
  letter-spacing:.16em;
  text-transform:uppercase;
  color:var(--celadon-400);
}
.contact-value{
  margin:0;
  font-size:15px;
  line-height:1.6;
  color:var(--white);
  overflow-wrap:anywhere;
}
.contact-note{
  margin:0;
  font-size:14px;
  line-height:1.7;
  color:var(--mist-300);
}
.footer-bottom{
  display:flex;
  flex-wrap:wrap;
  justify-content:space-between;
  gap:10px 28px;
  padding:22px 0 36px;
  font-size:12px;
  color:var(--mist-300);
}
.footer-meta{
  margin:0;
  letter-spacing:.02em;
}

/* ---------- 通用内容组件 ---------- */
.panel{
  padding:clamp(18px,3vw,28px);
  background:var(--ink-800);
  border:var(--line);
  box-shadow:var(--shadow-hard);
}
.panel--paper{
  background:var(--paper-50);
  border-color:var(--ink-900);
  box-shadow:var(--shadow-hard-paper);
  color:var(--ink-900);
}
.panel--paper h2,
.panel--paper h3{color:var(--ink-900)}
.grid-2{
  display:grid;
  grid-template-columns:repeat(2,minmax(0,1fr));
  gap:var(--gutter);
}
.grid-3{
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  gap:var(--gutter);
}
.stack{display:grid;gap:var(--gutter)}
.prose{max-width:34em}
.prose > :first-child{margin-top:0}
.prose p,
.prose li{line-height:1.85}
.prose h2{margin-top:1.3em}
.prose h3{margin-top:1.2em}
.prose ul,
.prose ol{padding-left:1.2em;margin:0 0 1.2em;list-style:revert}
.prose li{margin-bottom:.4em}
.prose a{
  color:var(--signal-500);
  text-decoration:underline;
  text-underline-offset:3px;
}
.section--paper .prose a{color:var(--signal-700)}
.prose blockquote{
  margin:0 0 1.2em;
  padding:14px 18px;
  background:var(--paper-200);
  border-left:4px solid var(--signal-700);
  color:var(--ink-900);
}
.breadcrumb{
  font-size:12px;
  letter-spacing:.08em;
  color:var(--mist-300);
  padding:18px 0 0;
}
.breadcrumb ol{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px;
  list-style:none;
}
.breadcrumb li{display:inline-flex;align-items:center;gap:8px}
.breadcrumb li::after{content:"/";color:var(--ink-700)}
.breadcrumb li:last-child::after{content:none}
.breadcrumb a{
  color:var(--mist-300);
  text-decoration:none;
  border-bottom:1px solid transparent;
  transition:color .18s var(--ease),border-color .18s var(--ease);
}
.breadcrumb a:hover{color:var(--signal-500);border-bottom-color:var(--signal-500)}
.section--paper .breadcrumb{color:var(--celadon-700)}
.section--paper .breadcrumb a{color:var(--celadon-700)}
.section--paper .breadcrumb a:hover{color:var(--signal-700);border-bottom-color:var(--signal-700)}
.section--paper .breadcrumb li::after{color:var(--paper-200)}

/* ---------- 图片容器基础 ---------- */
.figure{
  margin:0;
  overflow:hidden;
  background:var(--ink-800);
  border:var(--line);
  box-shadow:var(--shadow-hard);
}
.section--paper .figure{
  border-color:var(--ink-900);
  box-shadow:var(--shadow-hard-paper);
}
.figure-media{
  position:relative;
  display:block;
  width:100%;
  overflow:hidden;
  background:var(--ink-800);
}
.figure-media::after{
  content:"";
  position:absolute;
  inset:0;
  pointer-events:none;
  background-image:
    repeating-linear-gradient(90deg,rgba(200,214,226,.10) 0 1px,transparent 1px 48px),
    repeating-linear-gradient(180deg,rgba(200,214,226,.10) 0 1px,transparent 1px 48px);
}
.figure-media img,
.figure-media svg,
.figure-media video{
  width:100%;
  height:100%;
  object-fit:cover;
}
.figure-caption{
  margin:0;
  padding:10px 14px;
  border-top:var(--line);
  font-size:12px;
  letter-spacing:.06em;
  color:var(--mist-300);
}
.is-16x9{aspect-ratio:16 / 9}
.is-4x3{aspect-ratio:4 / 3}
.is-1x1{aspect-ratio:1 / 1}
.is-3x4{aspect-ratio:3 / 4}
.is-21x9{aspect-ratio:21 / 9}

/* ---------- 返回顶部（JS 注入） ---------- */
.to-top{
  position:fixed;
  right:20px;
  bottom:20px;
  z-index:90;
  display:grid;
  place-items:center;
  width:46px;
  height:46px;
  padding:0;
  background:var(--ink-800);
  color:var(--signal-500);
  border:2px solid var(--signal-500);
  box-shadow:var(--shadow-hard);
  font-family:var(--font-display);
  font-size:16px;
  line-height:1;
  cursor:pointer;
  opacity:0;
  visibility:hidden;
  transform:translateY(8px);
  transition:opacity .2s var(--ease),transform .2s var(--ease),visibility .2s,background-color .18s var(--ease),color .18s var(--ease);
}
.to-top[data-visible="true"]{
  opacity:1;
  visibility:visible;
  transform:none;
}
.to-top:hover{background:var(--signal-500);color:var(--ink-900)}

/* ---------- 响应式 ---------- */
@media (max-width:1080px){
  .nav-link{padding:0 8px;font-size:13px}
  .nav-index{font-size:10px}
  .cmd-status{padding:6px 9px}
}

@media (max-width:960px){
  .nav-toggle{display:inline-flex}
  .cmd-status{display:none}
  .cmd-cta{display:none}
  .site-nav{
    position:absolute;
    top:100%;
    left:0;
    right:0;
    display:none;
    margin-left:0;
    padding:8px 0 20px;
    background:var(--ink-900);
    border-top:var(--line);
    border-bottom:2px solid var(--signal-500);
    max-height:calc(100vh - var(--header-h));
    overflow-y:auto;
  }
  .site-nav[data-open="true"]{
    display:block;
    animation:navIn .22s var(--ease) both;
  }
  .nav-list{
    flex-direction:column;
    align-items:stretch;
    gap:0;
  }
  .nav-link{
    width:100%;
    height:auto;
    padding:15px 24px;
    font-size:15px;
    border-bottom:1px solid var(--ink-700);
    border-left:3px solid transparent;
    background:transparent;
  }
  .nav-link:hover{background:var(--ink-800);border-left-color:var(--ink-700)}
  .nav-link[aria-current="page"]{
    background:var(--ink-800);
    border-bottom-color:var(--ink-700);
    border-left-color:var(--signal-500);
  }
  .nav-extra{
    display:grid;
    gap:10px;
    padding:18px 24px 0;
    border-top:1px solid var(--ink-700);
    margin-top:12px;
  }
  .footer-top{grid-template-columns:1fr}
  .footer-contact{grid-template-columns:repeat(2,minmax(0,1fr))}
  .contact-item--note{grid-column:1 / -1}
  .grid-2,.grid-3{grid-template-columns:1fr}
}

@keyframes navIn{
  from{opacity:0;transform:translateY(-8px)}
  to{opacity:1;transform:none}
}

@media (max-width:640px){
  body{font-size:16px}
  .cmd-inner{gap:12px;padding:0 16px}
  .footer-inner{padding:0 16px}
  .container{padding:0 16px}
  .footer-cols{grid-template-columns:repeat(2,minmax(0,1fr))}
  .footer-contact{grid-template-columns:1fr;gap:12px}
  .contact-item{padding:14px}
  .footer-bottom{flex-direction:column;align-items:flex-start;gap:8px}
  .to-top{right:14px;bottom:14px;width:42px;height:42px}
}

@media (prefers-reduced-motion: reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
  }
  .status-dot{animation:none;opacity:1}
  .btn:hover,.btn:active{transform:none;box-shadow:var(--shadow-hard)}
  .btn-paper:hover{box-shadow:var(--shadow-hard-paper)}
  .site-nav[data-open="true"]{animation:none}
  .header-progress span{transition:none}
  .to-top{transform:none}
  .skip-link{transition:none}
}