*,*::before,*::after{margin:0;padding:0;box-sizing:border-box}
:root{
  --deep-blue:#0B1F3A;
  --navy-blue:#122A4C;
  --gold:#F5A524;
  --red:#E63946;
  --electric-blue:#00D2FF;
  --purple:#7A5AF8;
  --light-gray:#F2F4F8;
  --white:#FFFFFF;
  --deep-blue-60:rgba(11,31,58,.6);
  --navy-blue-80:rgba(18,42,76,.8);
  --gold-20:rgba(245,165,36,.2);
  --red-20:rgba(230,57,70,.2);
  --line:rgba(255,255,255,.14);
  --line-gold:rgba(245,165,36,.45);
  --header-h:56px;
  --header-second:46px;
  --container-w:1240px;
  --font-head:'Archivo Narrow','Oswald','Noto Sans SC','Microsoft YaHei',sans-serif;
  --font-body:'Inter','Noto Sans SC','Microsoft YaHei','PingFang SC',sans-serif;
  --font-mono:'Roboto Mono','SFMono-Regular',Consolas,monospace;
}
html{scroll-behavior:smooth;background:var(--deep-blue)}
body{
  font-family:var(--font-body);
  font-size:1rem;
  line-height:1.6;
  color:var(--light-gray);
  background:var(--deep-blue);
}
a{color:var(--gold);text-decoration:none;transition:color .2s ease,border-color .2s ease,background-color .2s ease}
a:hover{color:var(--electric-blue)}
img{max-width:100%;display:block;border:0}
button{font-family:var(--font-body);cursor:pointer}
ul,ol{list-style:none}
.visually-hidden{position:absolute!important;width:1px!important;height:1px!important;padding:0!important;margin:-1px!important;overflow:hidden!important;clip:rect(0,0,0,0)!important;white-space:nowrap!important;border:0!important}
.skip-link,.skiplink{
  position:fixed;
  top:-60px;
  left:16px;
  z-index:2000;
  background:var(--gold);
  color:var(--deep-blue);
  font-weight:700;
  font-size:.875rem;
  padding:10px 16px;
  text-transform:uppercase;
  letter-spacing:.06em;
  border-bottom:3px solid var(--red);
  transition:top .2s ease;
}
.skip-link:focus,.skiplink:focus{top:8px;color:var(--deep-blue)}
.container{max-width:var(--container-w);margin:0 auto;padding-left:24px;padding-right:24px}
.mono{font-family:var(--font-mono);letter-spacing:.02em}
.list-clean{list-style:none;margin:0;padding:0}

/* Header */
.header{
  position:relative;
  background:var(--deep-blue);
  border-bottom:1px solid var(--line-gold);
}
.progress-track{position:fixed;top:0;left:0;z-index:1300;width:100%;height:4px;background:rgba(255,255,255,.08)}
.progress-bar{height:4px;width:0;background:var(--electric-blue);transition:width .1s linear}
.header-strip{
  background:var(--deep-blue);
  border-bottom:1px solid var(--line);
  padding-top:8px;
  padding-bottom:8px;
  margin-top:4px;
}
.header-strip-inner{display:flex;align-items:center;justify-content:space-between;gap:24px}
.brand-logo{display:inline-flex;align-items:center;gap:12px;text-decoration:none}
.brand-mark{
  display:inline-flex;align-items:center;justify-content:center;
  width:40px;height:40px;
  background:linear-gradient(135deg,var(--red),var(--electric-blue));
  color:var(--deep-blue);
  font-family:var(--font-head);
  font-weight:800;
  font-size:.875rem;
  letter-spacing:.08em;
  border:1px solid rgba(255,255,255,.35);
  position:relative;
  overflow:hidden;
}
.brand-mark::after{content:"";position:absolute;top:-4px;right:-4px;width:18px;height:18px;background:var(--gold);opacity:.25;transform:rotate(45deg)}
.brand-text{display:flex;flex-direction:column;line-height:1.15}
.brand-name{color:var(--white);font-family:var(--font-head);font-size:1.35rem;font-weight:700;letter-spacing:.04em}
.brand-slogan{color:var(--gold);font-family:var(--font-mono);font-size:.72rem;font-weight:400;letter-spacing:.18em;text-transform:uppercase}
.brand-status{display:flex;align-items:center;gap:8px;border:1px solid var(--line);padding:4px 12px}
.brand-status-text{font-size:.75rem;color:var(--light-gray);letter-spacing:.08em}
.status-light{width:8px;height:8px;border-radius:50%;background:var(--electric-blue);display:inline-block;position:relative}
.status-light::after{content:"";position:absolute;inset:-3px;border:1px solid var(--electric-blue);border-radius:50%;opacity:.5;animation:pulse 2s ease-in-out infinite}
@keyframes pulse{0%,100%{transform:scale(1);opacity:.5}50%{transform:scale(1.6);opacity:0}}
.header-nav{background:var(--navy-blue);border-top:1px solid var(--line)}
.header-nav-inner{display:flex;align-items:center;justify-content:space-between;min-height:var(--header-second)}
.nav-main{display:flex;align-items:center;gap:4px;flex-wrap:wrap}
.nav-link{
  display:inline-block;
  padding:10px 16px;
  color:var(--light-gray);
  font-weight:600;
  font-size:.9375rem;
  letter-spacing:.04em;
  border-left:3px solid transparent;
  background:transparent;
  text-decoration:none;
  transition:background .2s,border-left .2s,color .2s;
}
.nav-link:hover{color:var(--electric-blue);background:rgba(0,210,255,.06)}
.nav-link[aria-current="page"]{
  color:var(--gold);
  border-left-color:var(--gold);
  background:rgba(245,165,36,.08);
}
.nav-toggle{
  display:none;
  flex-direction:column;
  justify-content:center;
  gap:5px;
  background:transparent;
  border:1px solid var(--line);
  width:44px;
  height:36px;
  padding:6px 9px;
  margin:0;
}
.nav-toggle:hover{border-color:var(--gold)}
.nav-toggle-line{width:100%;height:2px;background:var(--white);transition:transform .25s ease,opacity .25s ease}
.nav-toggle[aria-expanded="true"] .nav-toggle-line:nth-child(1){transform:translateY(7px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] .nav-toggle-line:nth-child(2){opacity:0}
.nav-toggle[aria-expanded="true"] .nav-toggle-line:nth-child(3){transform:translateY(-7px) rotate(-45deg)}

/* Footer */
.footer{background:var(--deep-blue);border-top:3px solid var(--gold);position:relative}
.footer::before{
  content:"";position:absolute;top:0;left:0;width:100%;height:1px;
  background:linear-gradient(90deg,var(--gold),var(--electric-blue),transparent);
}
.footer-grid{
  display:grid;
  grid-template-columns:1.2fr .8fr 1fr .9fr;
  gap:48px 40px;
  padding-top:48px;
  padding-bottom:40px;
}
.footer-brand{display:flex;flex-direction:column;gap:14px}
.footer-brand-line{display:flex;align-items:center;gap:12px}
.footer-mark{width:36px;height:36px;font-size:.75rem}
.footer-brand-name{font-family:var(--font-head);color:var(--white);font-size:1.4rem;font-weight:700}
.footer-about{font-size:.875rem;line-height:1.7;color:rgba(255,255,255,.65);max-width:30em}
.footer-meta{font-size:.75rem;color:rgba(255,255,255,.4);letter-spacing:.08em}
.footer-index .legend-title,.footer-contact .legend-title,.footer-cert .legend-title{
  color:var(--gold);
  font-family:var(--font-mono);
  font-size:.75rem;
  font-weight:400;
  letter-spacing:.22em;
  text-transform:uppercase;
  margin-bottom:14px;
  position:relative;
  padding-bottom:8px;
}
.legend-title::after{content:"";position:absolute;left:0;bottom:0;width:32px;height:2px;background:var(--red)}
.footer-index li,.footer-contact li,.footer-list li{margin-bottom:8px}
.footer-link{color:rgba(255,255,255,.7);font-size:.9375rem;text-decoration:none;border-bottom:1px solid transparent;transition:color .2s,border-color .2s,padding-left .2s}
.footer-link:hover{color:var(--electric-blue);border-bottom-color:var(--electric-blue);padding-left:2px}
.legend-item{display:flex;flex-direction:column;gap:2px;font-size:.875rem;color:rgba(255,255,255,.7)}
.legend-label{font-size:.7rem;color:var(--green);color:var(--purple);letter-spacing:.12em;text-transform:uppercase}
.footer-address{font-style:normal;line-height:1.5}
.footer-cert p{margin-bottom:6px;color:rgba(255,255,255,.55);font-size:.8rem}
.footer-copy{margin-top:12px;color:rgba(255,255,255,.35);font-size:.75rem}
.footer-bottom{border-top:1px solid var(--line);padding-top:16px;padding-bottom:16px;background:var(--navy-blue)}
.footer-note{font-size:.8rem;color:rgba(255,255,255,.45);letter-spacing:.04em}

/* 通用按钮 */
.btn{
  display:inline-block;
  background:transparent;
  border:1px solid var(--gold);
  color:var(--gold);
  font-family:var(--font-mono);
  font-size:.9375rem;
  font-weight:700;
  letter-spacing:.08em;
  text-transform:uppercase;
  padding:12px 28px;
  line-height:1;
  cursor:pointer;
  transition:transform .15s ease,background .2s,color .2s,box-shadow .2s;
  text-decoration:none;
}
.btn-gold{background:var(--gold);color:var(--deep-blue)}
.btn-gold:hover{background:var(--electric-blue);border-color:var(--electric-blue);color:var(--deep-blue);transform:translateY(-2px);box-shadow:0 6px 0 rgba(0,210,255,.15)}
.btn-outline{border-color:rgba(255,255,255,.4);color:var(--white)}
.btn-outline:hover{border-color:var(--gold);color:var(--gold);transform:translateY(-2px)}

/* 通用版式组件 */
.breadcrumb{font-family:var(--font-mono);font-size:.8125rem;color:rgba(255,255,255,.5);padding:16px 0;border-bottom:1px solid var(--line)}
.breadcrumb a{color:var(--gold);text-decoration:none}
.section-head{display:flex;align-items:baseline;gap:20px;margin-bottom:28px;position:relative;padding-left:16px;border-left:4px solid var(--gold)}
.section-head .mono{color:var(--electric-blue)}
.section-title{font-family:var(--font-head);font-size:2rem;font-weight:700;color:var(--white);line-height:1.2}
.section-sub{color:rgba(255,255,255,.6);font-size:1rem;margin-top:6px}

/* 通用网格与卡片 */
.grid-2{display:grid;grid-template-columns:1fr 1fr;gap:24px}
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.card-flat{
  background:var(--navy-blue);
  border:1px solid var(--line);
  padding:24px;
  position:relative;
  transition:border-color .25s ease,transform .25s ease,box-shadow .25s ease;
}
.card-flat:hover{border-color:var(--gold);transform:translateY(-3px);box-shadow:0 10px 24px rgba(0,0,0,.25)}
.card-flat .card-index{color:var(--electric-blue);font-family:var(--font-mono);font-size:.75rem;letter-spacing:.12em}
.card-flat h3{color:var(--white);font-family:var(--font-head);font-size:1.25rem;margin-top:8px}
.card-flat p{color:rgba(255,255,255,.6);font-size:.875rem;margin-top:8px}

/* 图片容器基础规则 */
.img-frame{
  position:relative;
  width:100%;
  background:var(--navy-blue);
  border:1px solid var(--line);
  overflow:hidden;
}
.img-frame::before{content:"";display:block;padding-top:56.25%}
.img-frame .img-placeholder-img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;background:linear-gradient(135deg,var(--navy-blue),var(--deep-blue))}
.img-frame::after{content:"";position:absolute;inset:0;background:linear-gradient(135deg,var(--gold-20),transparent 55%);pointer-events:none;opacity:.6}

/* 框景首屏 */
.hero-frame{position:relative;border:1px solid var(--line-gold);background:linear-gradient(135deg,rgba(245,165,36,.06),transparent 52%),var(--navy-blue);padding:40px;margin-bottom:40px}
.hero-frame::before{content:"●" ;content:"";position:absolute;top:-6px;left:-6px;width:12px;height:12px;background:var(--gold)}
.hero-frame::after{content:"";position:absolute;right:-6px;bottom:-6px;width:12px;height:12px;background:var(--red)}
.legend-swash{display:inline-block;width:44px;height:3px;background:linear-gradient(90deg,var(--gold),var(--red));margin-bottom:10px}

/* 焦点与降级 */
:focus-visible{outline:2px solid var(--electric-blue);outline-offset:2px}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{animation:none!important;transition:none!important}
}

/* 响应式 */
@media (max-width:960px){
  .footer-grid{grid-template-columns:1fr 1fr;gap:36px 28px}
  .nav-main{display:none;position:absolute;top:100%;left:0;width:100%;background:var(--navy-blue);flex-direction:column;align-items:stretch;border-top:1px solid var(--line);box-shadow:0 18px 30px rgba(0,0,0,.3)}
  .nav-main[data-open]{display:flex}
  .nav-link{border-left:none;border-bottom:1px solid var(--line);padding:14px 24px}
  .nav-toggle{display:inline-flex}
  .header{position:relative}
  .header-nav-inner{position:relative}
}
@media (max-width:640px){
  .container{padding-left:16px;padding-right:16px}
  .brand-name{font-size:1.1rem}
  .brand-slogan{font-size:.6rem}
  .brand-status-text{display:none}
  .footer-grid{grid-template-columns:1fr;gap:28px}
  .grid-2{grid-template-columns:1fr}
  .grid-3{grid-template-columns:1fr}
  .hero-frame{padding:24px}
}
@media (min-width:641px) and (max-width:1024px){
  .grid-3{grid-template-columns:1fr 1fr}
}