/* ===================== reset ===================== */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body,h1,h2,h3,h4,h5,p,figure,blockquote,ul,ol,dl,dd{margin:0}
ul,ol{padding:0;list-style:none}
img,svg,video{display:block;max-width:100%}
a{color:inherit;text-decoration:none}
button{background:none;border:0;padding:0;color:inherit;font:inherit;cursor:pointer}
table{border-collapse:collapse;width:100%}
[id]{scroll-margin-top:104px}

/* ===================== tokens ===================== */
:root{
  --ink:#0B0E12;
  --panel:#151A21;
  --panel-deep:#0F141A;
  --panel-raise:#1B222B;
  --silver:#C7CED8;
  --muted:#8E98A6;
  --text:#E6EBF2;
  --cyan:#22E0D6;
  --cyan-deep:#0E8E89;
  --orange:#FF6A1A;
  --yellow:#FFB020;
  --white:#F5F7FA;
  --grad-night:linear-gradient(135deg,#0B0E12 0%,#123A3C 100%);
  --edge:2px solid rgba(199,206,216,.18);
  --edge-strong:2px solid rgba(199,206,216,.34);
  --hairline:1px solid rgba(199,206,216,.14);
  --shadow-hard:6px 6px 0 rgba(0,0,0,.45);
  --shadow-soft:4px 4px 0 rgba(0,0,0,.32);
  --radius:2px;
  --ease:cubic-bezier(.16,1,.3,1);
  --shell-max:1280px;
  --font-display:"Arial Narrow","Helvetica Neue Condensed","Helvetica Neue",-apple-system,"PingFang SC","Microsoft YaHei",sans-serif;
  --font-mono:ui-monospace,SFMono-Regular,Menlo,Consolas,"Courier New",monospace;
  --font-serif:Georgia,"Songti SC","Times New Roman",serif;
  --font-body:-apple-system,BlinkMacSystemFont,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC",sans-serif;
}

/* ===================== base ===================== */
body{
  min-height:100vh;
  font-family:var(--font-body);
  font-size:16px;
  line-height:1.75;
  color:var(--text);
  background-color:var(--ink);
  background-image:
    radial-gradient(1100px 620px at 6% -14%, rgba(34,224,214,.10), transparent 62%),
    radial-gradient(920px 540px at 98% 0%, rgba(255,106,26,.075), transparent 60%);
  background-repeat:no-repeat;
  -webkit-font-smoothing:antialiased;
}
:focus-visible{outline:2px solid var(--cyan);outline-offset:3px;border-radius:1px}

/* ===================== typography ===================== */
h1,h2,h3,h4{font-weight:800;line-height:1.15;letter-spacing:.01em}
.display{
  font-family:var(--font-display);
  font-weight:800;
  text-transform:uppercase;
  letter-spacing:.02em;
  line-height:1.02;
  color:var(--white);
  font-size:clamp(30px,5.4vw,64px);
}
.mono{font-family:var(--font-mono);font-variant-numeric:tabular-nums;letter-spacing:.02em}
.serif{font-family:var(--font-serif)}
.lede{font-size:clamp(15px,1.5vw,18px);line-height:1.7;color:var(--silver);max-width:44ch}
.eyebrow{
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.2em;
  text-transform:uppercase;
  color:var(--cyan);
}
.section-title{
  font-family:var(--font-display);
  font-size:clamp(26px,4.2vw,50px);
  text-transform:uppercase;
  letter-spacing:.02em;
  color:var(--white);
}

/* ===================== layout ===================== */
.shell{width:100%;max-width:var(--shell-max);margin-inline:auto;padding-inline:clamp(16px,4vw,40px)}
.section{position:relative;padding-block:clamp(44px,6vw,92px)}
.section-head{
  display:flex;flex-direction:column;gap:10px;
  padding-bottom:14px;margin-bottom:clamp(20px,3vw,36px);
  border-bottom:2px solid rgba(199,206,216,.16);
}
.prose{max-width:66ch;font-size:16px;line-height:1.75;color:var(--text)}
.prose p + p{margin-top:1em}
.prose h2{font-family:var(--font-display);font-size:clamp(20px,2.6vw,28px);margin:1.4em 0 .5em;color:var(--white)}
.prose h3{font-size:17px;margin:1.2em 0 .4em;color:var(--white)}
.prose ul{list-style:disc;padding-left:1.2em;margin:.6em 0}
.prose li{margin:.3em 0}
.grid-12{display:grid;grid-template-columns:repeat(12,minmax(0,1fr));gap:clamp(16px,2vw,28px)}
.col-12{grid-column:span 12}
.col-8{grid-column:span 8}
.col-7{grid-column:span 7}
.col-5{grid-column:span 5}
.col-4{grid-column:span 4}
.col-3{grid-column:span 3}
.aside-note{
  font-family:var(--font-serif);
  font-size:14px;line-height:1.95;color:var(--muted);
  border-left:2px solid var(--cyan-deep);
  padding-left:14px;
}
.breadcrumb{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px;
  font-family:var(--font-mono);font-size:11px;letter-spacing:.12em;
  text-transform:uppercase;color:var(--muted);
}
.breadcrumb li::after{content:"/";margin-left:8px;color:rgba(142,152,166,.45)}
.breadcrumb li:last-child::after{content:""}
.breadcrumb a{color:var(--silver)}
.breadcrumb a:hover{color:var(--cyan)}

/* ===================== buttons ===================== */
.btn{
  display:inline-flex;align-items:center;gap:8px;
  padding:12px 20px;
  font-size:14px;font-weight:700;letter-spacing:.06em;
  color:var(--white);background:transparent;
  border:2px solid var(--silver);
  box-shadow:5px 5px 0 rgba(0,0,0,.45);
  transition:transform .24s var(--ease),box-shadow .24s var(--ease),border-color .2s,color .2s,background-color .2s;
}
.btn:hover{transform:translate(-2px,-2px);box-shadow:7px 7px 0 rgba(0,0,0,.5);border-color:var(--cyan);color:var(--cyan)}
.btn:active{transform:translate(1px,1px);box-shadow:2px 2px 0 rgba(0,0,0,.4)}
.btn-primary{background:var(--orange);color:#180A02;border-color:#180A02;box-shadow:5px 5px 0 rgba(255,106,26,.24)}
.btn-primary:hover{background:var(--orange);color:#180A02;border-color:#180A02;box-shadow:7px 7px 0 rgba(255,106,26,.34);transform:translate(-2px,-2px)}
.btn-ghost{background:var(--panel)}
.btn-line{border-color:var(--cyan-deep);color:var(--cyan)}
.btn-line:hover{border-color:var(--cyan)}

/* ===================== header ===================== */
.site-header{
  position:sticky;top:0;z-index:80;
  padding:10px clamp(10px,3vw,30px) 6px;
}
.header-shell{
  position:relative;
  width:100%;max-width:var(--shell-max);margin-inline:auto;
  display:flex;align-items:center;gap:clamp(10px,2vw,26px);
  padding:11px clamp(12px,2vw,18px);
  background:rgba(11,14,18,.9);
  -webkit-backdrop-filter:blur(12px);
  backdrop-filter:blur(12px);
  border:2px solid rgba(199,206,216,.22);
  box-shadow:8px 8px 0 rgba(0,0,0,.5),inset 0 0 0 1px rgba(34,224,214,.06);
  transition:padding .26s var(--ease),box-shadow .26s var(--ease),border-color .2s;
}
.site-header[data-scrolled="true"] .header-shell{
  padding:6px clamp(10px,2vw,14px);
  border-color:rgba(34,224,214,.28);
  box-shadow:4px 4px 0 rgba(0,0,0,.5);
}
.scroll-progress{
  position:absolute;left:-2px;right:-2px;bottom:-2px;height:2px;
  transform:scaleX(0);transform-origin:0 50%;
  background:linear-gradient(90deg,var(--cyan) 0%,var(--cyan-deep) 55%,var(--orange) 100%);
  pointer-events:none;
}
.skip-link{
  position:fixed;left:14px;top:-80px;z-index:120;
  padding:10px 16px;
  font-size:14px;font-weight:700;letter-spacing:.04em;
  color:#04120F;background:var(--cyan);border:2px solid #04120F;
  transition:top .22s var(--ease);
}
.skip-link:focus{top:14px}

.brand{display:flex;align-items:baseline;gap:10px;flex:0 0 auto;min-width:0}
.brand-mark{
  position:relative;padding-left:13px;
  font-family:var(--font-display);
  font-size:clamp(19px,2.3vw,25px);font-weight:800;
  letter-spacing:.06em;line-height:1;color:var(--white);
  text-transform:uppercase;white-space:nowrap;
}
.brand-mark::before{
  content:"";position:absolute;left:0;top:50%;
  width:7px;height:7px;background:var(--orange);
  transform:translateY(-50%) rotate(45deg);
}
.brand-sub{
  font-family:var(--font-mono);font-size:10px;letter-spacing:.16em;
  text-transform:uppercase;color:var(--muted);white-space:nowrap;
}

.nav{flex:1 1 auto;display:flex;justify-content:flex-end;min-width:0}
.nav-list{display:flex;align-items:center;flex-wrap:wrap;justify-content:flex-end;gap:2px}
.nav-list a{
  display:inline-flex;align-items:center;gap:7px;
  padding:8px 11px;
  font-size:14px;letter-spacing:.02em;color:var(--silver);
  border:1px solid transparent;white-space:nowrap;
  transition:color .2s,border-color .2s,background-color .2s;
}
.nav-list a:hover{color:var(--cyan);border-color:rgba(34,224,214,.45);background:rgba(34,224,214,.07)}
.nav-idx{font-family:var(--font-mono);font-size:10px;letter-spacing:.08em;color:var(--muted)}
.nav-list a[aria-current="page"]{
  color:#04120F;background:var(--cyan);border-color:var(--cyan);
  font-weight:700;
}
.nav-list a[aria-current="page"] .nav-idx{color:rgba(4,18,15,.62)}
.nav-list a[aria-current="page"]:hover{color:#04120F;background:var(--cyan);border-color:var(--cyan)}

.header-cta{
  flex:0 0 auto;display:inline-flex;align-items:center;gap:8px;
  padding:9px 16px;
  font-size:13px;font-weight:700;letter-spacing:.08em;
  color:#180A02;background:var(--orange);border:2px solid #180A02;
  box-shadow:4px 4px 0 rgba(255,106,26,.22);
  transition:transform .22s var(--ease),box-shadow .22s var(--ease);
}
.header-cta:hover{transform:translate(-2px,-2px);box-shadow:6px 6px 0 rgba(255,106,26,.32)}
.header-cta:active{transform:translate(0,0);box-shadow:2px 2px 0 rgba(255,106,26,.2)}

.nav-toggle{
  display:none;align-items:center;gap:9px;
  padding:9px 13px;
  font-size:13px;letter-spacing:.1em;
  color:var(--silver);border:2px solid rgba(199,206,216,.34);
  transition:color .2s,border-color .2s,background-color .2s;
}
.nav-toggle:hover{color:var(--cyan);border-color:var(--cyan)}
.nav-toggle-bars{
  display:inline-block;width:16px;height:2px;background:currentColor;
  box-shadow:0 -5px 0 currentColor,0 5px 0 currentColor;
}
.nav-toggle[data-open="true"]{color:var(--cyan);border-color:var(--cyan);background:rgba(34,224,214,.08)}

/* ===================== cards / panels / tags ===================== */
.card{
  position:relative;
  padding:clamp(16px,2vw,24px);
  background:var(--panel);
  border:var(--edge);
  box-shadow:var(--shadow-hard);
  transition:border-color .22s,transform .24s var(--ease),box-shadow .24s var(--ease);
}
.card:hover,.card:focus-within{
  border-color:var(--cyan);
  transform:translate(-3px,-3px);
  box-shadow:9px 9px 0 rgba(14,142,137,.28);
}
.panel{
  padding:clamp(16px,2.4vw,28px);
  background:var(--panel);
  border:var(--hairline);
}
.panel-tinted{background-image:var(--grad-night);border:var(--edge-strong)}
.panel-inset{background:var(--panel-deep);border:var(--hairline)}
.tag{
  display:inline-flex;align-items:center;gap:6px;
  padding:3px 8px;
  font-family:var(--font-mono);font-size:11px;letter-spacing:.1em;
  text-transform:uppercase;border:1px solid currentColor;color:var(--silver);
}
.tag-live{color:var(--orange)}
.tag-warn{color:var(--yellow)}
.tag-info{color:var(--cyan)}
.tag-mute{color:var(--muted)}
.tag-live::before{
  content:"";width:6px;height:6px;border-radius:50%;background:currentColor;
  animation:pulse-dot 1.6s infinite ease-in-out;
}
@keyframes pulse-dot{0%,100%{opacity:1}50%{opacity:.25}}
.stat{display:flex;flex-direction:column;gap:4px}
.stat-value{
  font-family:var(--font-mono);font-variant-numeric:tabular-nums;
  font-size:clamp(26px,4vw,42px);line-height:1;color:var(--white);
}
.stat-label{
  font-size:12px;letter-spacing:.12em;text-transform:uppercase;color:var(--muted);
}
.sticky-date{
  position:sticky;top:78px;z-index:20;
  padding:10px 0;background:var(--ink);
  border-bottom:2px solid var(--cyan-deep);
  font-family:var(--font-mono);font-size:12px;letter-spacing:.16em;
  color:var(--cyan);text-transform:uppercase;
}

/* ===================== media frames ===================== */
.media{
  position:relative;overflow:hidden;
  background:var(--panel-deep);
  border:var(--edge-strong);
}
.media img{width:100%;height:100%;object-fit:cover}
.media::after{
  content:"";position:absolute;inset:auto 0 0 0;height:54%;
  background:linear-gradient(180deg,rgba(11,14,18,0),rgba(11,14,18,.86));
  pointer-events:none;
}
.media-16x9{aspect-ratio:16/9}
.media-4x3{aspect-ratio:4/3}
.media-3x4{aspect-ratio:3/4}
.media-1x1{aspect-ratio:1/1}
.media-slant{clip-path:polygon(0 0,100% 0,100% 87%,0 100%)}
.media-cap{
  margin-top:10px;
  font-family:var(--font-mono);font-size:11px;letter-spacing:.1em;
  color:var(--muted);
}

/* ===================== reveal ===================== */
[data-reveal]{opacity:0;transform:translateY(14px);transition:opacity .3s var(--ease),transform .3s var(--ease)}
[data-reveal][data-revealed="true"]{opacity:1;transform:none}

/* ===================== to top ===================== */
.to-top{
  display:inline-flex;align-items:center;gap:8px;
  margin-top:18px;padding:10px 14px;
  font-size:12px;letter-spacing:.12em;
  color:var(--cyan);background:var(--panel);
  border:2px solid var(--cyan-deep);
  box-shadow:var(--shadow-soft);
  transition:opacity .24s var(--ease),transform .24s var(--ease),border-color .2s,visibility .24s;
}
.to-top[data-visible="false"]{opacity:0;visibility:hidden;transform:translateY(10px);pointer-events:none}
.to-top[data-visible="true"]{position:fixed;right:clamp(14px,3vw,30px);bottom:clamp(14px,3vw,30px);z-index:70;margin-top:0}
.to-top:hover{border-color:var(--cyan);background:var(--panel-raise)}
.to-top-text{font-family:var(--font-mono)}

/* ===================== footer ===================== */
.site-footer{
  position:relative;
  margin-top:clamp(52px,7vw,104px);
  background:linear-gradient(180deg,#0B0E12 0%,#10161B 44%,#0B0E12 100%);
  border-top:2px solid rgba(199,206,216,.2);
}
.site-footer::before{
  content:"";position:absolute;left:0;right:0;top:-2px;height:3px;
  background:linear-gradient(90deg,var(--cyan) 0 20%,var(--orange) 20% 32%,rgba(199,206,216,.2) 32% 100%);
}
.footer-shell{padding-block:clamp(38px,6vw,72px)}
.footer-dash{
  display:grid;grid-template-columns:minmax(0,1fr) minmax(0,2.1fr);
  gap:clamp(24px,4vw,56px);align-items:start;
}
.footer-brand{display:flex;flex-direction:column;gap:10px}
.footer-brand-name{
  font-family:var(--font-display);
  font-size:clamp(24px,3vw,34px);font-weight:800;
  letter-spacing:.04em;text-transform:uppercase;color:var(--white);line-height:1.05;
}
.footer-brand-line{font-size:14px;color:var(--silver);max-width:34ch}
.footer-brand-note{font-size:13px;line-height:1.8;color:var(--muted);max-width:36ch}
.footer-meta{
  margin-top:6px;font-family:var(--font-mono);font-size:11px;
  letter-spacing:.1em;color:var(--muted);
}
.footer-lines{
  display:grid;grid-template-columns:repeat(2,minmax(0,1fr));
  gap:1px;background:rgba(199,206,216,.14);
  border:1px solid rgba(199,206,216,.14);
}
.footer-line{
  display:flex;flex-direction:column;gap:8px;
  padding:clamp(14px,2vw,22px);background:#0D1117;
}
.line-index{font-family:var(--font-mono);font-size:11px;letter-spacing:.16em;color:var(--cyan)}
.line-title{
  font-family:var(--font-display);font-size:16px;font-weight:800;
  letter-spacing:.04em;text-transform:uppercase;color:var(--white);
}
.line-desc{font-size:13px;line-height:1.7;color:var(--muted)}
.line-link{
  align-self:flex-start;margin-top:auto;padding-bottom:2px;
  font-family:var(--font-mono);font-size:12px;letter-spacing:.1em;
  color:var(--cyan);border-bottom:1px solid rgba(34,224,214,.38);
  transition:color .2s,border-color .2s;
}
.line-link:hover{color:var(--orange);border-color:rgba(255,106,26,.55)}
.footer-support{
  display:flex;flex-wrap:wrap;align-items:center;gap:10px 22px;
  margin-top:clamp(26px,4vw,44px);
  padding:16px clamp(14px,2vw,22px);
  background:var(--panel);
  border:var(--hairline);border-left:4px solid var(--orange);
}
.footer-support-title{font-size:13px;font-weight:700;letter-spacing:.08em;color:var(--white)}
.footer-support a{
  font-size:13px;color:var(--silver);
  border-bottom:1px solid rgba(199,206,216,.26);
  transition:color .2s,border-color .2s;
}
.footer-support a:hover{color:var(--cyan);border-color:var(--cyan)}
.footer-base{
  display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1.1fr);
  gap:clamp(20px,3vw,44px);
  margin-top:clamp(26px,4vw,40px);
  padding-top:clamp(20px,3vw,28px);
  border-top:var(--hairline);
}
.footer-legal-wrap{display:flex;flex-direction:column;align-items:flex-start}
.footer-legal{display:flex;flex-wrap:wrap;gap:10px 18px}
.footer-legal a{font-size:13px;color:var(--silver);transition:color .2s}
.footer-legal a:hover{color:var(--cyan)}
.footer-contact{display:grid;gap:8px;font-size:13px;color:var(--muted)}
.footer-contact p{display:flex;flex-wrap:wrap;gap:10px;align-items:baseline}
.contact-label{
  min-width:66px;
  font-family:var(--font-mono);font-size:11px;letter-spacing:.12em;
  text-transform:uppercase;color:var(--cyan);
}
.contact-value{color:var(--silver);word-break:break-word}

/* ===================== responsive ===================== */
@media (max-width:1100px){
  .col-8,.col-7{grid-column:span 12}
  .col-5,.col-4,.col-3{grid-column:span 6}
  .brand-sub{display:none}
}
@media (max-width:900px){
  .nav-toggle{display:inline-flex}
  .header-shell{gap:10px}
  .nav{
    position:absolute;left:-2px;right:-2px;top:calc(100% + 10px);
    display:none;justify-content:flex-start;
    padding:10px;
    background:rgba(11,14,18,.98);
    border:2px solid rgba(199,206,216,.28);
    box-shadow:8px 8px 0 rgba(0,0,0,.55);
  }
  .nav[data-open="true"]{display:block}
  .nav-list{flex-direction:column;align-items:stretch;gap:2px}
  .nav-list a{
    justify-content:flex-start;padding:12px 14px;font-size:15px;
    border-bottom:1px solid rgba(199,206,216,.12);
  }
  .nav-list li:last-child a{border-bottom:0}
  .footer-dash{grid-template-columns:1fr}
  .footer-base{grid-template-columns:1fr}
  .sticky-date{top:66px}
}
@media (max-width:720px){
  .col-5,.col-4,.col-3{grid-column:span 12}
  .footer-lines{grid-template-columns:1fr}
  .lede{max-width:none}
}
@media (max-width:600px){
  .header-cta{display:none}
  .brand-mark{font-size:18px}
  .footer-legal{flex-direction:column;gap:8px}
}

/* ===================== motion guard ===================== */
@media (prefers-reduced-motion: reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
  }
  [data-reveal]{opacity:1;transform:none}
  .to-top[data-visible="false"]{opacity:1;visibility:visible;transform:none}
}