*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
:root{
  --color-primary:#FF4D00;
  --color-primary-light:#FF8A00;
  --color-secondary:#1F2D3D;
  --color-secondary-mid:#3C4F66;
  --color-accent:#00FFA3;
  --color-text:#E8ECF0;
  --color-text-muted:#A8B2C2;
  --color-bg-light:#F5F7FA;
  --color-bg-card:#FFFFFF;
  --color-bg-data:#0D1B2A;
  --gradient-primary:linear-gradient(135deg,#FF4D00,#FF8A00);
  --font-sans:'PingFang SC','Microsoft YaHei','Helvetica Neue',Arial,sans-serif;
  --font-mono:'SFMono-Regular',Consolas,'Liberation Mono',Menlo,monospace;
  --space-unit:8px;
  --transition-speed:.2s;
  --radius:0px;
  --header-h:64px;
}
html{scroll-behavior:auto;font-size:16px}
body{
  font-family:var(--font-sans);
  background-color:var(--color-bg-light);
  color:#222;
  line-height:1.6;
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
}
ul,ol{list-style:none}
a{color:inherit;text-decoration:none}
button,input,select,textarea{font:inherit;color:inherit;background:none;border:none;appearance:none;-webkit-appearance:none}
img{max-width:100%;display:block}
:focus-visible{outline:2px solid var(--color-accent);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-width:0}
.skip-link{
  position:fixed;top:var(--space-unit);left:var(--space-unit);z-index:9999;
  background:var(--color-accent);color:var(--color-bg-data);
  font-weight:900;font-size:.875rem;
  padding:calc(var(--space-unit) * .75) calc(var(--space-unit) * 1.5);
  transform:translateY(-200%);transition:transform .2s ease;
}
.skip-link:focus{transform:translateY(0)}

/* ===== Command Bar / Header ===== */
.site-header{
  position:sticky;top:0;z-index:1000;
  background:var(--color-secondary);
  border-bottom:1px solid var(--color-secondary-mid);
  box-shadow:0 4px 24px rgba(0,0,0,.25);
}
.command-bar__inner{
  max-width:1440px;margin:0 auto;
  display:grid;grid-template-columns:auto 1fr auto;align-items:center;
  gap:calc(var(--space-unit) * 2);
  padding:0 calc(var(--space-unit) * 2);
  min-height:var(--header-h);
}
.brand{display:inline-flex;align-items:center;gap:calc(var(--space-unit) * 1);flex-shrink:0}
.brand__mark{
  display:inline-flex;align-items:center;justify-content:center;
  width:36px;height:36px;background:var(--gradient-primary);
  color:#fff;font-weight:900;font-size:.875rem;letter-spacing:-.02em;
  box-shadow:0 0 0 1px rgba(255,77,0,.4),0 4px 12px rgba(255,77,0,.3);
}
.brand__name{
  font-weight:900;font-size:1.125rem;letter-spacing:.02em;color:#fff;
  white-space:nowrap;
}
.site-nav__list{display:flex;align-items:center;gap:calc(var(--space-unit) * .5)}
.site-nav__list a{
  display:inline-flex;align-items:baseline;gap:calc(var(--space-unit) * .5);
  padding:calc(var(--space-unit) * .75) calc(var(--space-unit) * 1);
  color:var(--color-text-muted);font-size:.875rem;font-weight:500;
  border-top:2px solid transparent;
  transition:color var(--transition-speed) ease;
  white-space:nowrap;
}
.site-nav__index{font-family:var(--font-mono);font-size:.625rem;color:var(--color-secondary-mid);font-weight:400}
.site-nav__list a:hover{color:#fff}
.site-nav__list a[aria-current="page"]{
  color:#fff;border-top-color:var(--color-primary);font-weight:900;
}
.site-nav__list a[aria-current="page"] .site-nav__index{color:var(--color-primary)}
.command-bar__meta{display:flex;align-items:center;gap:calc(var(--space-unit) * 1.5);justify-self:end}
.round-status{
  display:inline-flex;align-items:center;gap:calc(var(--space-unit) * .5);
  background:var(--color-bg-data);padding:calc(var(--space-unit) * .5) calc(var(--space-unit) * 1);
  font-size:.75rem;color:var(--color-text-muted);font-family:var(--font-mono);
  border:1px solid var(--color-secondary-mid);
}
.round-status__dot{
  width:8px;height:8px;border-radius:50%;background:var(--color-accent);
  animation:statusPulse 2s infinite ease-in-out;flex-shrink:0;
}
@keyframes statusPulse{0%,100%{opacity:1;box-shadow:0 0 0 0 rgba(0,255,163,.5)}50%{opacity:.7;box-shadow:0 0 0 4px rgba(0,255,163,.15)}}
.round-search{
  display:inline-flex;align-items:center;gap:calc(var(--space-unit) * .5);
  background:var(--color-secondary-mid);color:#fff;
  padding:calc(var(--space-unit) * .5) calc(var(--space-unit) * 1);
  font-size:.75rem;font-weight:900;letter-spacing:.02em;
  transition:background var(--transition-speed) ease;
}
.round-search:hover{background:var(--color-primary)}
.round-search__icon{font-size:1rem;line-height:1}
.command-bar__progress{
  position:absolute;left:0;bottom:-1px;height:2px;width:0%;
  background:var(--gradient-primary);z-index:1001;
}
.nav-toggle{
  display:none;flex-direction:column;justify-content:center;gap:4px;
  width:40px;height:40px;padding:8px;cursor:pointer;background:transparent;
}
.nav-toggle__bar{display:block;height:2px;background:#fff;transition:transform var(--transition-speed) ease,opacity var(--transition-speed) ease}
.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(1){transform:translateY(6px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(2){opacity:0}
.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(3){transform:translateY(-6px) rotate(-45deg)}

/* ===== Footer ===== */
.site-footer{
  background:var(--color-secondary);color:var(--color-text);
  border-top:4px solid var(--color-primary);
  position:relative;
}
.site-footer__inner{max-width:1440px;margin:0 auto;padding:calc(var(--space-unit) * 6) calc(var(--space-unit) * 2) calc(var(--space-unit) * 3)}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.4fr;gap:calc(var(--space-unit) * 5)}
.footer-brand .brand{margin-bottom:calc(var(--space-unit) * 2)}
.brand--footer .brand__mark{background:var(--gradient-primary)}
.footer-brand__desc{font-size:.875rem;color:var(--color-text-muted);line-height:1.7;max-width:34em;margin-bottom:calc(var(--space-unit) * 1.5)}
.footer-brand__trust{font-size:.75rem;color:var(--color-accent);font-family:var(--font-mono);border-left:2px solid var(--color-primary);padding-left:calc(var(--space-unit) * 1)}
.footer-title{
  font-size:.75rem;font-weight:900;letter-spacing:.1em;text-transform:uppercase;
  color:var(--color-primary-light);margin-bottom:calc(var(--space-unit) * 2);
  padding-bottom:calc(var(--space-unit) * .5);
  border-bottom:1px solid var(--color-secondary-mid);
}
.footer-links__list li{margin-bottom:calc(var(--space-unit) * .75)}
.footer-links__list a{color:var(--color-text-muted);font-size:.875rem;transition:color var(--transition-speed) ease}
.footer-links__list a:hover{color:#fff;padding-left:calc(var(--space-unit) * .5)}
.footer-contact p{color:var(--color-text-muted);font-size:.875rem;line-height:1.7;margin-bottom:calc(var(--space-unit) * .5)}
.site-footer__bottom{
  margin-top:calc(var(--space-unit) * 4);
  padding-top:calc(var(--space-unit) * 2);
  border-top:1px solid var(--color-secondary-mid);
  display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:calc(var(--space-unit) * 1);
  font-size:.75rem;color:var(--color-text-muted);font-family:var(--font-mono);
}
.back-to-top{
  position:absolute;right:calc(var(--space-unit) * 2);bottom:calc(var(--space-unit) * 6);
  width:44px;height:44px;background:var(--color-primary);color:#fff;font-size:1.25rem;
  display:inline-flex;align-items:center;justify-content:center;
  opacity:0;visibility:hidden;transform:translateY(8px);
  transition:opacity var(--transition-speed) ease,transform var(--transition-speed) ease,background var(--transition-speed) ease;
  z-index:10;cursor:pointer;
  box-shadow:0 4px 16px rgba(255,77,0,.4);
}
.back-to-top.is-visible{opacity:1;visibility:visible;transform:translateY(0)}
.back-to-top:hover{background:var(--color-primary-light)}

/* ===== Responsive ===== */
@media (max-width:1024px){
  .footer-grid{grid-template-columns:1fr 1fr;gap:calc(var(--space-unit) * 3)}
  .round-status__text{display:none}
  .round-search span{display:none}
  .round-search{width:36px;height:36px;justify-content:center;padding:0;font-size:1rem}
}
@media (max-width:768px){
  .command-bar__inner{grid-template-columns:auto 1fr auto;padding:0 calc(var(--space-unit) * 1)}
  .site-nav{
    position:fixed;top:var(--header-h);right:0;height:calc(100vh - var(--header-h));width:min(80%,360px);
    background:var(--color-secondary);border-left:1px solid var(--color-secondary-mid);
    transform:translateX(100%);transition:transform .25s ease;
    padding:calc(var(--space-unit) * 2);
    overflow-y:auto;
    box-shadow:-8px 0 24px rgba(0,0,0,.3);
  }
  .site-nav[data-open]{transform:translateX(0)}
  .site-nav__list{flex-direction:column;align-items:stretch;gap:0}
  .site-nav__list a{
    padding:calc(var(--space-unit) * 1.5);border-top:none;
    border-left:3px solid transparent;font-size:1rem;
  }
  .site-nav__list a[aria-current="page"]{border-left-color:var(--color-primary)}
  .nav-toggle{display:flex}
  .brand__name{font-size:1rem}
  .footer-grid{grid-template-columns:1fr}
  .site-footer__bottom{flex-direction:column;align-items:flex-start}
  .back-to-top{right:var(--space-unit);bottom:var(--space-unit)}
}

/* ===== Shared UI Components ===== */
.container{max-width:1200px;margin:0 auto;padding:0 calc(var(--space-unit) * 2)}
.grid{display:grid;gap:calc(var(--space-unit) * 2)}
.grid--2{grid-template-columns:repeat(2,1fr)}
.grid--3{grid-template-columns:repeat(3,1fr)}
.grid--4{grid-template-columns:repeat(4,1fr)}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:calc(var(--space-unit) * 1);
  padding:calc(var(--space-unit) * 1) calc(var(--space-unit) * 2);
  font-weight:900;font-size:.875rem;letter-spacing:.04em;text-align:center;
  border:1px solid transparent;cursor:pointer;
  transition:background var(--transition-speed) ease,color var(--transition-speed) ease,border-color var(--transition-speed) ease,box-shadow var(--transition-speed) ease;
}
.btn--primary{background:var(--gradient-primary);color:#fff;box-shadow:0 2px 8px rgba(255,77,0,.3)}
.btn--primary:hover{box-shadow:0 4px 20px rgba(255,77,0,.45)}
.btn--ghost{border-color:var(--color-secondary-mid);color:var(--color-secondary)}
.btn--ghost:hover{border-color:var(--color-primary);color:var(--color-primary)}
.breadcrumbs{
  display:flex;flex-wrap:wrap;gap:calc(var(--space-unit) * 1);
  font-size:.75rem;color:var(--color-text-muted);font-family:var(--font-mono);
  padding:calc(var(--space-unit) * 1) 0;
}
.breadcrumbs a{color:var(--color-text-muted)}
.breadcrumbs a:hover{color:var(--color-primary)}
.breadcrumbs li+li::before{content:"/";margin-right:calc(var(--space-unit) * 1);color:var(--color-secondary-mid)}
.media{position:relative;overflow:hidden;background:var(--color-bg-data)}
.media--16x9{aspect-ratio:16/9}
.media--4x3{aspect-ratio:4/3}
.media--1x1{aspect-ratio:1/1}
.media > img,.media > .media__placeholder{position:absolute;inset:0;width:100%;height:100%;object-fit:cover}

/* ===== Editorial Index & Panels ===== */
.index-title{display:flex;align-items:baseline;gap:calc(var(--space-unit) * 1);font-size:clamp(1.5rem,4vw,3rem);font-weight:900;letter-spacing:-.02em;color:var(--color-secondary)}
.index-title__no{font-family:var(--font-mono);font-size:.875rem;color:var(--color-primary);font-weight:400}
.data-panel{
  background:var(--color-bg-card);border:1px solid #E2E8F0;
  padding:calc(var(--space-unit) * 2);position:relative;
  box-shadow:0 1px 3px rgba(0,0,0,.04);
  transform:rotate(var(--tilt,0deg));
  transition:transform var(--transition-speed) ease,box-shadow var(--transition-speed) ease;
}
.data-panel:hover{box-shadow:0 8px 24px rgba(0,0,0,.08);transform:rotate(var(--tilt,0deg)) translateY(-2px)}
.data-panel--tilt{--tilt:-2deg}
.tag{
  display:inline-block;padding:2px 8px;font-size:.6875rem;font-weight:900;letter-spacing:.08em;
  font-family:var(--font-mono);background:var(--color-secondary);color:var(--color-text);
}
.tag--accent{background:var(--color-accent);color:var(--color-bg-data)}
.tag--primary{background:var(--color-primary);color:#fff}

/* ===== Reduced Motion ===== */
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{
    animation-duration:.01ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.01ms !important;
    scroll-behavior:auto !important;
  }
  .site-nav{transition:none}
  .round-status__dot{animation:none}
  .back-to-top{transition:none}
}