/* =========================================================
   南宫赛场 / Site Kit — /assets/site.css
   1 Reset · 2 Tokens · 3 Type · 4 Layout · 5 Buttons
   6 Panels · 7 Media · 8 Breadcrumb · 9 Header · 10 Footer
   11 Motion · 12 Responsive
   ========================================================= */

/* ---------- 1. Reset ---------- */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body,h1,h2,h3,h4,h5,p,ul,ol,li,figure,blockquote,dl,dd{margin:0}
ul,ol{padding:0;list-style:none}
img,svg,video{display:block;max-width:100%;height:auto}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
a{color:inherit;text-decoration:none}
table{border-collapse:collapse;width:100%}

/* ---------- 2. Tokens ---------- */
:root{
  --c-bg:#071A16;
  --c-panel:#0F2E26;
  --c-line:#27473D;
  --c-mist:#8FA89E;
  --c-paper:#EAF3ED;
  --c-lime:#C8FF4D;
  --c-amber:#FF9B45;
  --c-black:#030A08;
  --c-lime-soft:rgba(200,255,77,.12);
  --c-lime-line:rgba(200,255,77,.34);
  --c-paper-dim:rgba(234,243,237,.74);
  --c-line-soft:rgba(39,71,61,.72);

  --font-head:"Barlow Condensed","Noto Sans SC Condensed","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;

  --cut:10px;
  --cut-lg:22px;
  --wrap:1280px;
  --ease:cubic-bezier(.33,.9,.28,1);
  --shadow-panel:0 24px 48px -34px rgba(0,0,0,.95);
}

/* ---------- 3. Base & Type ---------- */
html,body{min-height:100%}
body{
  background-color:var(--c-bg);
  background-image:
    linear-gradient(rgba(234,243,237,.022) 1px,transparent 1px),
    linear-gradient(90deg,rgba(234,243,237,.022) 1px,transparent 1px),
    radial-gradient(900px 520px at 84% -8%,rgba(200,255,77,.10),transparent 62%),
    radial-gradient(760px 480px at -4% 2%,rgba(255,155,69,.055),transparent 60%);
  background-size:84px 84px,84px 84px,auto,auto;
  background-repeat:repeat,repeat,no-repeat,no-repeat;
  background-position:0 0,0 0,0 0,0 0;
  color:var(--c-paper);
  font-family:var(--font-body);
  font-size:clamp(16px,1.05vw,17.5px);
  line-height:1.55;
  letter-spacing:.01em;
  overflow-x:hidden;
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4{font-family:var(--font-head);font-weight:800;letter-spacing:-.02em;line-height:1.08;text-wrap:balance}
h1{font-size:clamp(2.4rem,5.4vw,3.95rem);line-height:1.05}
h2{font-size:clamp(1.75rem,3.2vw,2.5rem);line-height:1.1}
h3{font-size:clamp(1.2rem,1.8vw,1.6rem);line-height:1.2;font-weight:700}
h4{font-size:1.05rem;line-height:1.25;font-weight:700}
p{color:var(--c-paper-dim)}
strong,b{font-weight:700;color:var(--c-paper)}
.lede{font-size:clamp(1.05rem,1.4vw,1.2rem);font-weight:700;line-height:1.45;color:var(--c-paper)}
.muted{color:var(--c-mist)}
.mono{font-family:var(--font-mono);font-variant-numeric:tabular-nums;font-weight:600;letter-spacing:.02em}
.eyebrow{
  display:inline-flex;align-items:center;gap:.6em;
  font-family:var(--font-mono);font-size:.72rem;font-weight:700;
  letter-spacing:.16em;text-transform:uppercase;color:var(--c-lime);
}
.eyebrow::before{content:"";width:22px;height:2px;background:var(--c-lime);flex:0 0 auto}
.side-note{
  border-left:1px solid var(--c-line);padding-left:14px;
  font-size:.9rem;line-height:1.6;color:var(--c-mist);
}
.tag{
  display:inline-flex;align-items:center;gap:6px;
  padding:4px 9px;
  font-family:var(--font-mono);font-size:.68rem;letter-spacing:.06em;
  color:var(--c-paper);background:rgba(39,71,61,.7);
  border-left:2px solid var(--c-amber);
}
.tag--lime{border-left-color:var(--c-lime)}
:focus-visible{outline:2px solid var(--c-lime);outline-offset:3px}
#main-content{display:block;scroll-margin-top:92px}

/* ---------- 4. Layout ---------- */
.wrap{width:100%;max-width:var(--wrap);margin-inline:auto;padding-inline:clamp(16px,4vw,40px)}
.section{padding-block:clamp(28px,4.5vw,64px)}
.stack>*+*{margin-top:var(--gap,1.1rem)}
.cluster{display:flex;flex-wrap:wrap;align-items:center;gap:var(--gap,.75rem)}
.grid{display:grid;gap:clamp(14px,2vw,24px)}
.grid--2{grid-template-columns:repeat(2,minmax(0,1fr))}
.grid--3{grid-template-columns:repeat(3,minmax(0,1fr))}
.grid--rail{grid-template-columns:minmax(0,1.9fr) minmax(0,1fr);align-items:start}
.prose{max-width:72ch}
.prose>*+*{margin-top:1em}
.prose h2{margin-top:1.7em}
.prose h3{margin-top:1.4em}
.prose ul,.prose ol{display:grid;gap:.55em;padding-left:1.1em;list-style:disc;color:var(--c-paper-dim)}
.prose a{color:var(--c-lime);border-bottom:1px solid var(--c-lime-line)}

/* ---------- 5. Buttons ---------- */
.btn{
  --btn-bg:transparent;
  --btn-fg:var(--c-paper);
  --btn-bd:var(--c-line);
  display:inline-flex;align-items:center;justify-content:center;gap:.5em;
  padding:11px 20px;
  font-family:var(--font-head);font-size:.95rem;font-weight:700;letter-spacing:.04em;
  line-height:1.2;white-space:nowrap;
  background:var(--btn-bg);color:var(--btn-fg);border:1px solid var(--btn-bd);
  clip-path:polygon(0 0,calc(100% - var(--cut)) 0,100% var(--cut),100% 100%,0 100%);
  transition:background .2s var(--ease),color .2s var(--ease),border-color .2s var(--ease),transform .2s var(--ease);
}
.btn:hover{transform:translateY(-1px)}
.btn--primary{--btn-bg:var(--c-lime);--btn-fg:var(--c-black);--btn-bd:var(--c-lime)}
.btn--primary:hover{--btn-bg:#DEFF8C;--btn-bd:#DEFF8C}
.btn--ghost{--btn-bg:transparent;--btn-fg:var(--c-paper);--btn-bd:var(--c-line)}
.btn--ghost:hover{--btn-bg:var(--c-lime-soft);--btn-fg:var(--c-lime);--btn-bd:var(--c-lime-line)}
.btn:focus-visible,.nav-toggle:focus-visible{
  outline:none;
  box-shadow:inset 0 0 0 2px rgba(3,10,8,.92),inset 0 0 0 4px var(--c-paper);
}

/* ---------- 6. Panels ---------- */
.panel{
  position:relative;
  background:var(--c-panel);
  box-shadow:var(--shadow-panel);
  padding:clamp(18px,2.4vw,30px);
  clip-path:polygon(0 0,calc(100% - var(--cut-lg)) 0,100% var(--cut-lg),100% 100%,0 100%);
}
.panel::after{
  content:"";position:absolute;top:0;right:calc(var(--cut-lg) + 14px);
  width:52px;height:2px;background:var(--c-lime);opacity:.85;
}
.panel--edge{box-shadow:inset 3px 0 0 0 var(--c-lime),var(--shadow-panel)}
.panel__head{
  display:flex;flex-wrap:wrap;align-items:baseline;justify-content:space-between;
  gap:.6rem 1rem;margin-bottom:1rem;
}
.panel__title{font-family:var(--font-head);font-size:1.15rem;font-weight:700;letter-spacing:-.01em;line-height:1.2}
.panel__meta{
  font-family:var(--font-mono);font-size:.68rem;letter-spacing:.14em;
  text-transform:uppercase;color:var(--c-mist);
}

/* ---------- 7. Media frames ---------- */
.media-frame{
  position:relative;overflow:hidden;isolation:isolate;
  aspect-ratio:16/9;
  background:linear-gradient(140deg,#0F2E26,#071A16 72%);
  clip-path:polygon(0 0,calc(100% - 20px) 0,100% 20px,100% 100%,0 100%);
}
.media-frame picture{display:block;width:100%;height:100%}
.media-frame img{width:100%;height:100%;object-fit:cover;filter:saturate(.86) contrast(1.02)}
.media-frame::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background:
    radial-gradient(120% 82% at 78% -12%,rgba(200,255,77,.16),transparent 62%),
    linear-gradient(180deg,rgba(7,26,22,0) 44%,rgba(7,26,22,.86) 100%);
}
.media-frame--wide{aspect-ratio:21/9}
.media-frame--square{aspect-ratio:1/1}
.media-frame--tall{aspect-ratio:4/5}
.media-caption{
  display:flex;align-items:baseline;gap:.6em;margin-top:.65em;
  font-family:var(--font-mono);font-size:.72rem;letter-spacing:.08em;color:var(--c-mist);
}
.media-caption::before{content:"";width:18px;height:1px;background:var(--c-amber);flex:0 0 auto}

/* ---------- 8. Breadcrumb ---------- */
.breadcrumb{margin-bottom:18px}
.breadcrumb-list{
  display:flex;flex-wrap:wrap;align-items:center;gap:6px;
  font-family:var(--font-mono);font-size:.7rem;letter-spacing:.1em;
  text-transform:uppercase;color:var(--c-mist);
}
.breadcrumb-item+.breadcrumb-item::before{content:"/";margin-right:6px;color:var(--c-line)}
.breadcrumb-link{color:var(--c-mist);transition:color .18s var(--ease)}
.breadcrumb-link:hover{color:var(--c-lime)}
.breadcrumb-item [aria-current]{color:var(--c-paper)}

/* ---------- 9. Header ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  color:var(--c-paper);
  background:linear-gradient(180deg,rgba(7,26,22,.99),rgba(7,26,22,.9));
  border-bottom:1px solid var(--c-line);
  backdrop-filter:blur(10px);
}
.skip-link{
  position:absolute;left:clamp(10px,2vw,22px);top:-120px;z-index:200;
  padding:10px 16px;
  font-family:var(--font-head);font-size:.9rem;font-weight:700;letter-spacing:.04em;
  color:var(--c-black);background:var(--c-lime);
  clip-path:polygon(0 0,calc(100% - 10px) 0,100% 10px,100% 100%,0 100%);
  transition:top .2s var(--ease);
}
.skip-link:focus{top:8px}
.scroll-meter{position:absolute;left:0;right:0;bottom:-1px;height:2px;background:rgba(39,71,61,.65);overflow:hidden}
.scroll-meter__bar{
  display:block;height:100%;width:0;
  background:linear-gradient(90deg,var(--c-lime),var(--c-amber));
  box-shadow:0 0 10px rgba(200,255,77,.6);
  transition:width .1s linear;
}
.header-shell{
  position:relative;
  display:flex;align-items:center;gap:clamp(8px,1.6vw,24px);
  width:100%;max-width:1360px;min-height:66px;
  margin-inline:auto;padding:9px clamp(14px,3vw,32px);
}
.brand{display:inline-flex;align-items:center;gap:10px;flex:0 0 auto}
.brand-mark{
  position:relative;width:28px;height:28px;flex:0 0 auto;
  background:var(--c-lime);
  clip-path:polygon(0 0,100% 0,100% 70%,70% 100%,0 100%);
}
.brand-mark::after{
  content:"";position:absolute;left:-10%;top:50%;width:120%;height:3px;
  background:var(--c-black);transform:rotate(-38deg);
}
.brand-text{display:block;line-height:1.05}
.brand-name{
  display:block;font-family:var(--font-head);font-size:1.2rem;font-weight:800;
  letter-spacing:.02em;color:var(--c-paper);
}
.brand-meta{
  display:block;margin-top:2px;
  font-family:var(--font-mono);font-size:.56rem;font-weight:600;
  letter-spacing:.28em;text-transform:uppercase;color:var(--c-mist);
}
.cmd-nav{flex:1 1 auto;display:flex;justify-content:center;min-width:0}
.nav-list{display:flex;align-items:center;gap:2px}
.nav-item{flex:0 0 auto}
.nav-link{
  position:relative;display:inline-flex;align-items:baseline;gap:6px;
  padding:9px 11px;
  font-family:var(--font-head);font-size:.94rem;font-weight:700;
  letter-spacing:.02em;color:var(--c-paper);white-space:nowrap;
  transition:color .2s var(--ease);
}
.nav-link::after{
  content:"";position:absolute;left:9px;right:9px;bottom:3px;height:2px;
  background:var(--c-lime);transform:scaleX(0);transform-origin:left center;
  transition:transform .24s var(--ease);
}
.nav-index{
  font-family:var(--font-mono);font-size:.62rem;font-weight:600;
  letter-spacing:.06em;color:var(--c-mist);
  transition:color .2s var(--ease);
}
.nav-label{display:inline-block}
.nav-link:hover,.nav-link:focus-visible{color:var(--c-lime)}
.nav-link:hover .nav-index,.nav-link:focus-visible .nav-index{color:var(--c-lime)}
.nav-link:hover::after,.nav-link:focus-visible::after{transform:scaleX(1);opacity:.55}
.nav-link[aria-current="page"]{color:var(--c-lime)}
.nav-link[aria-current="page"] .nav-index{color:var(--c-lime)}
.nav-link[aria-current="page"]::after{
  transform:scaleX(1);opacity:1;
  box-shadow:0 0 12px rgba(200,255,77,.65);
}
.header-side{display:flex;align-items:center;gap:14px;flex:0 0 auto}
.header-status,.nav-extras__status{
  display:inline-flex;align-items:center;gap:7px;
  font-family:var(--font-mono);font-size:.68rem;font-weight:600;
  letter-spacing:.14em;text-transform:uppercase;color:var(--c-mist);
  white-space:nowrap;
}
.status-dot{
  width:7px;height:7px;flex:0 0 auto;border-radius:50%;
  background:var(--c-lime);
  animation:lime-pulse 2.6s var(--ease) infinite;
}
@keyframes lime-pulse{
  0%{box-shadow:0 0 0 0 rgba(200,255,77,.5)}
  70%{box-shadow:0 0 0 7px rgba(200,255,77,0)}
  100%{box-shadow:0 0 0 0 rgba(200,255,77,0)}
}
.header-cta{padding:9px 16px;font-size:.9rem}
.nav-toggle{
  display:none;align-items:center;gap:8px;margin-left:auto;
  padding:9px 13px;
  border:1px solid var(--c-line);color:var(--c-paper);
  font-family:var(--font-head);font-size:.86rem;font-weight:700;letter-spacing:.08em;
  clip-path:polygon(0 0,calc(100% - 10px) 0,100% 10px,100% 100%,0 100%);
  transition:border-color .2s var(--ease),color .2s var(--ease),background .2s var(--ease);
}
.nav-toggle:hover{border-color:var(--c-lime-line);color:var(--c-lime);background:var(--c-lime-soft)}
.nav-toggle__box{position:relative;display:block;width:16px;height:12px}
.nav-toggle__box span{
  position:absolute;left:0;right:0;height:2px;background:var(--c-lime);
  transition:transform .22s var(--ease),opacity .16s var(--ease);
}
.nav-toggle__box span:nth-child(1){top:0}
.nav-toggle__box span:nth-child(2){top:5px}
.nav-toggle__box span:nth-child(3){top:10px}
.site-header[data-open] .nav-toggle__box span:nth-child(1){transform:translateY(5px) rotate(45deg)}
.site-header[data-open] .nav-toggle__box span:nth-child(2){opacity:0}
.site-header[data-open] .nav-toggle__box span:nth-child(3){transform:translateY(-5px) rotate(-45deg)}
.nav-extras{display:none}

/* ---------- 10. Footer ---------- */
.site-footer{
  position:relative;overflow:hidden;
  margin-top:clamp(48px,8vw,96px);
  border-top:1px solid var(--c-line);
  background:linear-gradient(180deg,rgba(15,46,38,.92),rgba(7,26,22,1) 58%);
  color:var(--c-paper);
}
.site-footer::before{
  content:"";position:absolute;top:-1px;left:0;width:min(340px,46%);height:2px;
  background:linear-gradient(90deg,var(--c-lime),rgba(200,255,77,0));
}
.footer-shell{
  max-width:var(--wrap);margin-inline:auto;
  padding:clamp(32px,5vw,64px) clamp(16px,4vw,40px) 0;
}
.footer-grid{
  display:grid;grid-template-columns:1.4fr 1.1fr .8fr;
  gap:clamp(26px,4vw,60px);
  padding-bottom:clamp(28px,4vw,48px);
}
.footer-col{min-width:0}
.footer-name{font-family:var(--font-head);font-size:1.6rem;font-weight:800;letter-spacing:.01em;line-height:1.1;color:var(--c-paper)}
.footer-line{
  margin-top:10px;font-family:var(--font-head);font-size:1.05rem;font-weight:700;
  letter-spacing:.02em;color:var(--c-lime);
}
.footer-note{margin-top:10px;max-width:34ch;font-size:.9rem;line-height:1.6;color:var(--c-paper-dim)}
.footer-meta{
  display:flex;align-items:center;gap:8px;margin-top:16px;
  font-family:var(--font-mono);font-size:.66rem;font-weight:600;
  letter-spacing:.12em;text-transform:uppercase;color:var(--c-mist);
}
.footer-title{
  padding-bottom:10px;margin-bottom:14px;
  border-bottom:1px solid var(--c-line-soft);
  font-family:var(--font-mono);font-size:.68rem;font-weight:700;
  letter-spacing:.18em;text-transform:uppercase;line-height:1.3;color:var(--c-mist);
}
.footer-list{display:grid;gap:12px}
.footer-list--links{gap:10px}
.footer-contact{display:grid;gap:3px}
.footer-contact__key{
  font-family:var(--font-mono);font-size:.62rem;font-weight:600;
  letter-spacing:.14em;text-transform:uppercase;color:var(--c-mist);
}
.footer-contact__val{font-size:.9rem;line-height:1.5;color:var(--c-paper);word-break:break-word}
.footer-link{
  display:inline-flex;align-items:center;gap:8px;
  font-size:.92rem;color:var(--c-paper);
  border-bottom:1px solid transparent;
  transition:color .2s var(--ease),border-color .2s var(--ease);
}
.footer-link::before{content:"";width:6px;height:6px;background:var(--c-line);transition:background .2s var(--ease)}
.footer-link:hover,.footer-link:focus-visible{color:var(--c-lime);border-bottom-color:var(--c-lime-line)}
.footer-link:hover::before,.footer-link:focus-visible::before{background:var(--c-lime)}
.footer-icp{
  margin-top:20px;
  font-family:var(--font-mono);font-size:.72rem;letter-spacing:.06em;color:var(--c-mist);
}
.footer-bottom{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:10px 20px;
  padding-block:16px 22px;border-top:1px solid var(--c-line-soft);
  font-size:.78rem;color:var(--c-mist);
}
.footer-copy{font-family:var(--font-mono);font-size:.74rem;letter-spacing:.06em;color:var(--c-mist)}
.footer-tag{
  display:inline-flex;align-items:center;gap:8px;
  font-family:var(--font-mono);font-size:.68rem;font-weight:700;
  letter-spacing:.22em;text-transform:uppercase;color:var(--c-lime);
}
.footer-tag::before{content:"";width:22px;height:1px;background:var(--c-lime)}

/* ---------- 11. Motion (JS 注入状态) ---------- */
.is-pending{
  opacity:0;transform:translateY(12px);
  transition:opacity .4s var(--ease),transform .4s var(--ease);
  will-change:opacity,transform;
}
.is-pending.is-in{opacity:1;transform:translateY(0);will-change:auto}

/* ---------- 12. Responsive ---------- */
@media (max-width:1080px){
  .nav-toggle{display:inline-flex}
  .header-side{display:none}
  .cmd-nav{
    position:absolute;top:100%;left:0;right:0;z-index:70;
    display:block;
    background:linear-gradient(180deg,#0C241F 0%,#071A16 100%);
    border-bottom:1px solid var(--c-line);
    box-shadow:0 26px 42px -30px rgba(0,0,0,.95);
    max-height:0;overflow:hidden;opacity:0;visibility:hidden;
    transition:max-height .34s var(--ease),opacity .22s var(--ease),visibility .22s var(--ease);
  }
  .site-header[data-open] .cmd-nav{
    max-height:min(76vh,620px);overflow-y:auto;opacity:1;visibility:visible;
  }
  .nav-list{display:block;padding:6px clamp(14px,4vw,28px) 0}
  .nav-item+.nav-item{border-top:1px solid rgba(39,71,61,.6)}
  .nav-link{display:flex;justify-content:space-between;align-items:center;padding:15px 2px;font-size:1.02rem}
  .nav-link::after{display:none}
  .nav-link .nav-index{order:2;font-size:.72rem}
  .nav-link[aria-current="page"],
  .nav-link[aria-current="page"] .nav-index{color:var(--c-lime)}
  .nav-extras{
    display:grid;gap:12px;
    padding:18px clamp(14px,4vw,28px) 22px;
    border-top:1px solid var(--c-line-soft);
    margin-top:8px;
  }
  .nav-extras__cta{width:100%}
  .footer-grid{grid-template-columns:1fr 1fr}
  .footer-col--brand{grid-column:1 / -1}
}
@media (max-width:900px){
  .grid--2,.grid--3,.grid--rail{grid-template-columns:minmax(0,1fr)}
}
@media (max-width:620px){
  .header-shell{min-height:58px;gap:8px}
  .brand-name{font-size:1.06rem}
  .brand-meta{display:none}
  .brand-mark{width:24px;height:24px}
  .nav-toggle{padding:8px 11px;font-size:.8rem}
  .footer-grid{grid-template-columns:1fr;gap:26px}
  .footer-col--brand{grid-column:auto}
  .footer-bottom{flex-direction:column;align-items:flex-start;gap:10px}
  .panel{padding:16px}
}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
  }
  .is-pending{opacity:1;transform:none;transition:none}
  .btn:hover{transform:none}
}