:root{
  --ink:#0A1420;
  --panel:#10243A;
  --deep:#08383C;
  --archive:#1E1B3A;
  --wine:#5C2436;
  --cyan:#48F2FF;
  --orange:#FF7A1A;
  --cool:#A9B7C6;
  --white:#F7FAFC;
  --line:#2B3C4E;
  --muted:#7B8FA3;

  --shell:1240px;
  --gutter:clamp(16px,3.6vw,40px);
  --ease:160ms cubic-bezier(.2,.7,.3,1);

  --font-condensed:"Barlow Condensed","Oswald","Arial Narrow","PingFang SC","Microsoft YaHei",system-ui,sans-serif;
  --font-serif:"Noto Serif SC","Source Han Serif SC","Songti SC",Georgia,"Times New Roman",serif;
  --font-mono:"IBM Plex Mono","JetBrains Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
  --font-sans:"Noto Sans SC","Inter",system-ui,-apple-system,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;
}

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

html{
  -webkit-text-size-adjust:100%;
  background:var(--ink);
  scroll-behavior:smooth;
  scroll-padding-top:136px;
}

body{
  margin:0;
  background:var(--ink);
  color:var(--white);
  font-family:var(--font-sans);
  font-size:16px;
  font-weight:400;
  line-height:1.72;
  letter-spacing:.01em;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}

h1,h2,h3,h4,h5,h6,p,figure,blockquote,dl,dd{margin:0;}
ul,ol{margin:0;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,picture,video{display:block;max-width:100%;}
table{border-collapse:collapse;width:100%;}
hr{border:0;}

::selection{background:var(--cyan);color:#041018;}

:where(a,button,[tabindex]):focus-visible{
  outline:2px solid var(--cyan);
  outline-offset:3px;
}

/* ---------- 布局骨架 ---------- */
.shell{
  width:min(calc(100% - 2 * var(--gutter)),var(--shell));
  margin-inline:auto;
}

.section{
  padding-block:clamp(40px,6vw,84px);
}

.grid{
  display:grid;
  gap:clamp(16px,2vw,26px);
}

.grid--12{
  grid-template-columns:repeat(12,minmax(0,1fr));
}

.rule{
  height:1px;
  width:100%;
  background:var(--line);
}

/* ---------- 排版组件 ---------- */
.kicker{
  display:flex;
  align-items:center;
  gap:10px;
  font-family:var(--font-condensed);
  font-size:12px;
  font-weight:800;
  letter-spacing:.24em;
  text-transform:uppercase;
  color:var(--cyan);
}
.kicker::before{
  content:"";
  width:26px;
  height:2px;
  background:var(--orange);
  flex:none;
}

.display{
  font-family:var(--font-serif);
  font-weight:600;
  letter-spacing:.02em;
  line-height:1.26;
  font-size:clamp(27px,4.2vw,47px);
  color:var(--white);
}

.display--sm{
  font-size:clamp(21px,2.8vw,32px);
  line-height:1.36;
}

.lede{
  max-width:62ch;
  font-size:clamp(15px,1.35vw,17px);
  line-height:1.86;
  color:var(--cool);
  letter-spacing:.02em;
}

.num{
  font-family:var(--font-mono);
  font-variant-numeric:tabular-nums;
  letter-spacing:-.02em;
}

/* ---------- 跳转链接 ---------- */
.skip-link{
  position:fixed;
  top:10px;
  left:50%;
  z-index:300;
  transform:translate(-50%,-190%);
  padding:11px 20px;
  background:var(--cyan);
  color:#041018;
  font-family:var(--font-condensed);
  font-size:13px;
  font-weight:800;
  letter-spacing:.18em;
  text-transform:uppercase;
  box-shadow:0 10px 26px rgba(4,10,18,.6);
  transition:transform var(--ease);
}
.skip-link:focus,
.skip-link:focus-visible{
  transform:translate(-50%,0);
}
.skip-link:focus-visible{
  outline:2px solid var(--white);
  outline-offset:3px;
}

/* ---------- 页头 ---------- */
.site-header{
  position:sticky;
  top:0;
  z-index:100;
  background:rgba(10,20,32,.96);
  border-bottom:1px solid var(--line);
  transition:box-shadow var(--ease),border-color var(--ease);
}
.site-header[data-stuck]{
  box-shadow:0 14px 34px rgba(4,10,18,.6);
  border-bottom-color:rgba(72,242,255,.3);
}

.scroll-progress{
  position:fixed;
  top:0;
  left:0;
  z-index:120;
  display:block;
  width:0;
  height:3px;
  background:linear-gradient(90deg,var(--cyan),var(--orange));
  transition:width 90ms linear;
}

.header-rail{
  background:var(--deep);
  border-bottom:1px solid rgba(72,242,255,.2);
}
.rail-inner{
  display:flex;
  align-items:center;
  gap:12px;
  min-height:34px;
  font-family:var(--font-condensed);
  font-size:11.5px;
  font-weight:700;
  letter-spacing:.16em;
  text-transform:uppercase;
}
.rail-tag{
  flex:none;
  padding:2px 9px;
  background:var(--cyan);
  color:#041018;
  font-weight:800;
  letter-spacing:.14em;
}
.rail-meta{
  color:#9FD8DD;
  letter-spacing:.14em;
  overflow:hidden;
  white-space:nowrap;
  text-overflow:ellipsis;
}
.rail-link{
  flex:none;
  margin-left:auto;
  color:var(--cyan);
  border-bottom:1px solid transparent;
  padding-bottom:1px;
  transition:border-color var(--ease),color var(--ease);
}
.rail-link:hover{
  color:var(--white);
  border-bottom-color:var(--cyan);
}

.header-bar{position:relative;}

.bar-inner{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:clamp(12px,2vw,26px);
  min-height:72px;
}

.brand{
  display:inline-flex;
  align-items:center;
  gap:12px;
  padding-block:8px;
  flex:none;
}
.brand-mark{
  display:grid;
  place-items:center;
  width:44px;
  height:44px;
  flex:none;
  background:var(--panel);
  border:1px solid rgba(72,242,255,.5);
  color:var(--cyan);
  font-family:var(--font-mono);
  font-size:15px;
  font-weight:600;
  letter-spacing:.02em;
  clip-path:polygon(0 0,100% 0,100% calc(100% - 11px),calc(100% - 11px) 100%,0 100%);
  transition:border-color var(--ease),color var(--ease),background var(--ease);
}
.brand:hover .brand-mark{
  background:rgba(72,242,255,.12);
  border-color:var(--cyan);
}
.brand-text{
  display:flex;
  flex-direction:column;
  line-height:1.05;
  min-width:0;
}
.brand-name{
  font-family:var(--font-condensed);
  font-size:21px;
  font-weight:800;
  letter-spacing:.08em;
  text-transform:uppercase;
  color:var(--white);
}
.brand-sub{
  margin-top:5px;
  font-family:var(--font-mono);
  font-size:9px;
  letter-spacing:.24em;
  text-transform:uppercase;
  color:var(--muted);
}
.brand--footer .brand-name{font-size:19px;}

.nav-toggle{
  display:inline-flex;
  align-items:center;
  gap:10px;
  margin-left:auto;
  padding:11px 15px;
  border:1px solid var(--line);
  color:var(--white);
  font-family:var(--font-condensed);
  font-size:12.5px;
  font-weight:800;
  letter-spacing:.18em;
  text-transform:uppercase;
  clip-path:polygon(0 0,100% 0,100% calc(100% - 10px),calc(100% - 10px) 100%,0 100%);
  transition:border-color var(--ease),color var(--ease),background var(--ease);
}
.nav-toggle:hover{
  border-color:var(--cyan);
  color:var(--cyan);
  background:rgba(72,242,255,.07);
}
.nav-toggle:focus-visible{
  outline:none;
  box-shadow:inset 0 0 0 2px var(--cyan);
}
.nav-toggle-bars{
  position:relative;
  display:block;
  width:18px;
  height:2px;
  flex:none;
  background:currentColor;
  transition:background var(--ease);
}
.nav-toggle-bars::before,
.nav-toggle-bars::after{
  content:"";
  position:absolute;
  left:0;
  width:18px;
  height:2px;
  background:currentColor;
  transition:transform var(--ease),top var(--ease);
}
.nav-toggle-bars::before{top:-6px;}
.nav-toggle-bars::after{top:6px;}
.site-header[data-open] .nav-toggle-bars{background:transparent;}
.site-header[data-open] .nav-toggle-bars::before{top:0;transform:rotate(45deg);}
.site-header[data-open] .nav-toggle-bars::after{top:0;transform:rotate(-45deg);}
.nav-toggle-text{white-space:nowrap;}

.primary-nav{
  display:none;
  order:3;
  flex:1 0 100%;
  margin-top:2px;
  padding-bottom:12px;
  border-top:1px solid var(--line);
}
.primary-nav[data-open]{display:block;}

.nav-list{
  display:flex;
  flex-direction:column;
}
.nav-item{min-width:0;}

.nav-link{
  position:relative;
  display:flex;
  align-items:baseline;
  gap:10px;
  padding:14px 2px;
  border-bottom:1px solid rgba(43,60,78,.7);
  font-family:var(--font-condensed);
  font-size:17px;
  font-weight:700;
  letter-spacing:.1em;
  text-transform:uppercase;
  color:var(--cool);
  transition:color var(--ease),background var(--ease),padding var(--ease);
}
.nav-index{
  font-family:var(--font-mono);
  font-size:10.5px;
  font-weight:500;
  letter-spacing:.06em;
  color:#4C6178;
  transition:color var(--ease);
}
.nav-label{display:block;}
.nav-link:hover{color:var(--white);}
.nav-link:hover .nav-index{color:var(--cyan);}

.nav-link[aria-current="page"]{
  color:var(--cyan);
  background:rgba(72,242,255,.07);
  padding-left:12px;
}
.nav-link[aria-current="page"] .nav-index{color:var(--orange);}
.nav-link[aria-current="page"]::before{
  content:"";
  position:absolute;
  left:0;
  top:8px;
  bottom:8px;
  width:3px;
  background:var(--orange);
}

/* ---------- 页脚 ---------- */
.site-footer{
  position:relative;
  margin-top:clamp(56px,9vw,120px);
  background:var(--ink);
  border-top:1px solid var(--line);
}
.site-footer::before{
  content:"";
  position:absolute;
  inset:0 0 auto 0;
  height:4px;
  background:linear-gradient(90deg,var(--cyan) 0 88px,var(--orange) 88px 132px,var(--line) 132px 100%);
}

.footer-upper{
  padding-block:clamp(38px,5.5vw,74px);
}

.footer-grid{
  display:grid;
  grid-template-columns:minmax(0,1.55fr) minmax(0,.72fr) minmax(0,.72fr) minmax(0,1.12fr);
  gap:clamp(26px,4vw,56px);
}

.footer-brand{min-width:0;}
.footer-brand .brand{margin-bottom:18px;}

.footer-desc{
  max-width:44ch;
  font-size:14px;
  line-height:1.86;
  color:var(--cool);
  letter-spacing:.02em;
}

.footer-facts{
  display:flex;
  flex-wrap:wrap;
  gap:8px;
  margin-top:18px;
}
.footer-fact{
  padding:4px 9px;
  border:1px solid rgba(72,242,255,.32);
  color:var(--cyan);
  font-family:var(--font-condensed);
  font-size:11px;
  font-weight:700;
  letter-spacing:.16em;
  text-transform:uppercase;
}

.footer-col{min-width:0;}
.footer-col-title{
  padding-bottom:10px;
  margin-bottom:16px;
  border-bottom:1px solid var(--line);
  font-family:var(--font-condensed);
  font-size:12px;
  font-weight:800;
  letter-spacing:.24em;
  text-transform:uppercase;
  color:var(--white);
}

.footer-links{display:grid;gap:11px;}
.footer-link{
  display:inline-flex;
  align-items:center;
  gap:9px;
  font-size:14.5px;
  color:var(--cool);
  transition:color var(--ease);
}
.footer-link::before{
  content:"";
  width:6px;
  height:6px;
  flex:none;
  background:var(--line);
  transition:background var(--ease),transform var(--ease);
}
.footer-link:hover{color:var(--white);}
.footer-link:hover::before{background:var(--cyan);transform:translateX(2px);}

.contact-list{display:grid;gap:13px;}
.contact-row{display:grid;gap:3px;}
.contact-key{
  font-family:var(--font-condensed);
  font-size:10.5px;
  font-weight:700;
  letter-spacing:.22em;
  text-transform:uppercase;
  color:var(--muted);
}
.contact-val{
  font-size:14.5px;
  line-height:1.6;
  color:var(--white);
  overflow-wrap:anywhere;
}

.footer-note{
  margin-top:18px;
  padding-left:12px;
  border-left:2px solid var(--wine);
  font-size:12.5px;
  line-height:1.8;
  color:var(--cool);
}

.footer-lower{
  border-top:1px solid var(--line);
  background:rgba(16,36,58,.62);
}
.footer-lower-inner{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:10px 26px;
  padding-block:18px;
  font-family:var(--font-condensed);
  font-size:12px;
  font-weight:700;
  letter-spacing:.14em;
  text-transform:uppercase;
  color:var(--cool);
}
.footer-copy{margin-right:auto;}
.footer-icp{
  font-family:var(--font-mono);
  font-weight:500;
  font-size:11.5px;
  letter-spacing:.04em;
  text-transform:none;
  color:var(--muted);
}
.footer-legal{
  display:flex;
  flex-wrap:wrap;
  gap:8px 20px;
}
.legal-link{
  color:var(--cool);
  border-bottom:1px solid transparent;
  padding-bottom:1px;
  transition:color var(--ease),border-color var(--ease);
}
.legal-link:hover{
  color:var(--cyan);
  border-color:var(--cyan);
}

/* ---------- 通用按钮 ---------- */
.btn{
  position:relative;
  display:inline-flex;
  align-items:center;
  gap:10px;
  padding:13px 24px;
  font-family:var(--font-condensed);
  font-size:13px;
  font-weight:800;
  letter-spacing:.18em;
  text-transform:uppercase;
  clip-path:polygon(0 0,100% 0,100% calc(100% - 11px),calc(100% - 11px) 100%,0 100%);
  transition:background var(--ease),color var(--ease),border-color var(--ease);
}
.btn:focus-visible{
  outline:none;
  box-shadow:inset 0 0 0 2px var(--ink),inset 0 0 0 4px var(--cyan);
}
.btn--cyan{background:var(--cyan);color:#041018;}
.btn--cyan:hover{background:var(--white);}
.btn--orange{background:var(--orange);color:#1A0C04;}
.btn--orange:hover{background:#FFA45B;}
.btn--ghost{
  background:transparent;
  color:var(--white);
  border:1px solid rgba(72,242,255,.55);
}
.btn--ghost:hover{
  color:var(--cyan);
  border-color:var(--cyan);
  background:rgba(72,242,255,.08);
}
.btn--ghost:focus-visible{
  box-shadow:inset 0 0 0 2px var(--cyan);
}

/* ---------- 标签 ---------- */
.tag{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:3px 10px;
  border:1px solid var(--line);
  font-family:var(--font-condensed);
  font-size:11px;
  font-weight:800;
  letter-spacing:.18em;
  text-transform:uppercase;
  color:var(--cool);
}
.tag--cyan{background:var(--cyan);border-color:var(--cyan);color:#041018;}
.tag--orange{background:var(--orange);border-color:var(--orange);color:#1A0C04;}
.tag--wine{background:var(--wine);border-color:var(--wine);color:var(--white);}
.tag--ghost{background:transparent;border-color:rgba(72,242,255,.4);color:var(--cyan);}

/* ---------- 面板 ---------- */
.panel{
  background:var(--panel);
  border:1px solid var(--line);
  padding:clamp(18px,2.4vw,30px);
}
.panel--cut{
  clip-path:polygon(0 0,calc(100% - 18px) 0,100% 18px,100% 100%,18px 100%,0 calc(100% - 18px));
}
.panel--deep{background:var(--deep);}
.panel--archive{background:var(--archive);}
.panel--wine{background:var(--wine);border-color:rgba(247,250,252,.16);}

/* ---------- 卡片 ---------- */
.card{
  background:var(--panel);
  border:1px solid var(--line);
  padding:clamp(16px,2vw,24px);
  transition:transform var(--ease),border-color var(--ease),background var(--ease);
}
.card:hover{
  transform:translateY(-3px);
  border-color:rgba(72,242,255,.55);
  background:#13293F;
}
.card-title{
  font-family:var(--font-condensed);
  font-size:18px;
  font-weight:800;
  letter-spacing:.06em;
  text-transform:uppercase;
  color:var(--white);
}
.card-meta{
  margin-top:8px;
  font-size:13px;
  line-height:1.75;
  letter-spacing:.03em;
  color:var(--cool);
}

/* ---------- 数据单元 ---------- */
.stat{
  display:flex;
  flex-direction:column;
  gap:6px;
  padding:14px 16px;
  background:rgba(16,36,58,.72);
  border-left:3px solid var(--cyan);
}
.stat-value{
  font-family:var(--font-mono);
  font-variant-numeric:tabular-nums;
  font-size:clamp(28px,4vw,44px);
  line-height:1.04;
  color:var(--white);
}
.stat-label{
  font-family:var(--font-condensed);
  font-size:11px;
  font-weight:700;
  letter-spacing:.22em;
  text-transform:uppercase;
  color:var(--cool);
}
.stat--orange{border-left-color:var(--orange);}
.stat--orange .stat-value{color:var(--orange);}

/* ---------- 图片容器 ---------- */
.img-frame{
  position:relative;
  display:block;
  overflow:hidden;
  background:var(--panel);
  border:1px solid var(--line);
}
.img-frame > img,
.img-frame > picture > img{
  width:100%;
  height:100%;
  object-fit:cover;
}
.img-frame::after{
  content:"";
  position:absolute;
  inset:0;
  pointer-events:none;
  opacity:.45;
  background-image:
    linear-gradient(rgba(72,242,255,.16) 1px,transparent 1px),
    linear-gradient(90deg,rgba(72,242,255,.16) 1px,transparent 1px);
  background-size:44px 44px;
}
.img-frame--hero{aspect-ratio:16 / 9;}
.img-frame--wide{aspect-ratio:21 / 9;}
.img-frame--square{aspect-ratio:1 / 1;}
.img-frame--portrait{aspect-ratio:3 / 4;}
.img-frame--cut{
  clip-path:polygon(0 0,calc(100% - 24px) 0,100% 24px,100% 100%,0 100%);
}
.img-caption{
  margin-top:10px;
  font-family:var(--font-condensed);
  font-size:11px;
  font-weight:700;
  letter-spacing:.18em;
  text-transform:uppercase;
  color:var(--muted);
}

/* ---------- 面包屑 ---------- */
.breadcrumbs{
  padding-block:14px;
  font-family:var(--font-condensed);
  font-size:12px;
  font-weight:700;
  letter-spacing:.16em;
  text-transform:uppercase;
  color:var(--muted);
}
.breadcrumbs ol{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:0 8px;
}
.breadcrumbs li{
  display:flex;
  align-items:center;
  gap:8px;
}
.breadcrumbs li:not(:last-child)::after{
  content:"›";
  color:#3D5570;
}
.breadcrumbs a{
  color:var(--cool);
  transition:color var(--ease);
}
.breadcrumbs a:hover{color:var(--cyan);}
.breadcrumbs [aria-current="page"]{color:var(--white);}

/* ---------- 主体容器 ---------- */
.main-content{display:block;}
.content-shell{
  width:min(calc(100% - 2 * var(--gutter)),760px);
  margin-inline:auto;
}

/* ---------- 平板 ---------- */
@media (max-width:1024px){
  .footer-grid{grid-template-columns:minmax(0,1fr) minmax(0,1fr);}
  .footer-brand{grid-column:1 / -1;}
}

/* ---------- 手机的导航 ---------- */
@media (max-width:640px){
  .rail-meta{display:none;}
  .rail-link{margin-left:auto;}
  .bar-inner{min-height:64px;}
  .brand-name{font-size:18px;}
  .brand-sub{font-size:8px;letter-spacing:.2em;}
  .brand-mark{width:38px;height:38px;font-size:13px;}
  .footer-grid{grid-template-columns:minmax(0,1fr);}
  .footer-lower-inner{flex-direction:column;align-items:flex-start;gap:10px;}
  .footer-copy{margin-right:0;}
}

@media (max-width:420px){
  .nav-toggle-text{display:none;}
  .nav-toggle{padding:11px 12px;}
}

/* ---------- 桌面 ---------- */
@media (min-width:900px){
  .bar-inner{flex-wrap:nowrap;}
  .nav-toggle{display:none;}
  .primary-nav{
    display:block;
    order:0;
    flex:0 1 auto;
    margin-left:auto;
    margin-top:0;
    padding-bottom:0;
    border-top:0;
  }
  .nav-list{flex-direction:row;align-items:stretch;}
  .nav-link{
    padding:10px 12px;
    border-bottom:0;
    font-size:16px;
    letter-spacing:.09em;
  }
  .nav-link[aria-current="page"]{
    padding-left:12px;
    background:transparent;
    color:var(--white);
  }
  .nav-link[aria-current="page"]::before{display:none;}
  .nav-link[aria-current="page"] .nav-index{color:var(--orange);}
  .nav-link::after{
    content:"";
    position:absolute;
    left:12px;
    right:12px;
    bottom:4px;
    height:2px;
    background:var(--cyan);
    transform:scaleX(0);
    transform-origin:left center;
    transition:transform var(--ease),background var(--ease);
  }
  .nav-link:hover::after{transform:scaleX(1);}
  .nav-link[aria-current="page"]::after{
    transform:scaleX(1);
    background:var(--orange);
  }
}

/* ---------- 减少动效 ---------- */
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto;}
  *,
  *::before,
  *::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
    scroll-behavior:auto !important;
  }
  .card:hover{transform:none;}
  .footer-link:hover::before{transform:none;}
  .scroll-progress{transition:none;}
}