/* Blog shared styles - dark tech theme matching main site */
:root{
  --bg:#0A0E1A;--bg-2:#0F1524;
  --surface:rgba(255,255,255,.04);--surface-2:rgba(255,255,255,.07);
  --border:rgba(255,255,255,.08);--border-2:rgba(255,255,255,.14);
  --text:#E6E9F2;--text-2:#9BA3B8;--text-3:#5F6980;
  --cyan:#00E5FF;--cyan-soft:rgba(0,229,255,.15);
  --violet:#A855F7;--violet-soft:rgba(168,85,247,.15);
  --amber:#F59E0B;--amber-soft:rgba(245,158,11,.15);
  --pink:#F472B6;--green:#34D399;
  --maxw:1366px;
  --font-h:"Space Grotesk","Noto Sans SC",system-ui,sans-serif;
  --font-b:"Inter","Noto Sans SC",system-ui,sans-serif;
  --font-m:"JetBrains Mono",ui-monospace,monospace;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-font-smoothing:antialiased}
body{background:var(--bg);color:var(--text);font-family:var(--font-b);font-size:17px;line-height:1.85;min-height:100vh;overflow-x:hidden}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block;border-radius:12px}

/* BG effects */
.bg-wrap{position:fixed;inset:0;z-index:0;overflow:hidden;pointer-events:none}
.bg-wrap .grid-bg{
  position:absolute;inset:0;
  background-image:linear-gradient(rgba(0,229,255,.05) 1px,transparent 1px),linear-gradient(90deg,rgba(0,229,255,.05) 1px,transparent 1px);
  background-size:60px 60px;
  mask-image:radial-gradient(ellipse at 50% 0%,#000 30%,transparent 75%);
  -webkit-mask-image:radial-gradient(ellipse at 50% 0%,#000 30%,transparent 75%);
}
.bg-wrap .orb{position:absolute;border-radius:50%;filter:blur(80px);opacity:.5;animation:bfloat 18s ease-in-out infinite}
.bg-wrap .orb.c1{width:420px;height:420px;background:radial-gradient(circle,var(--cyan),transparent 70%);top:-120px;left:-80px;animation-delay:0s}
.bg-wrap .orb.c2{width:380px;height:380px;background:radial-gradient(circle,var(--violet),transparent 70%);top:30%;right:-100px;animation-delay:-6s}
.bg-wrap .orb.c3{width:340px;height:340px;background:radial-gradient(circle,var(--amber),transparent 70%);bottom:-100px;left:30%;animation-delay:-12s;opacity:.35}
@keyframes bfloat{0%,100%{transform:translate(0,0) scale(1)}33%{transform:translate(40px,-30px) scale(1.1)}66%{transform:translate(-30px,40px) scale(.95)}}
.noise{
  position:fixed;inset:0;z-index:1;pointer-events:none;opacity:.04;mix-blend-mode:overlay;
  background-image:url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='120' height='120'><filter id='n'><feTurbulence baseFrequency='0.85' numOctaves='2'/></filter><rect width='100%25' height='100%25' filter='url(%23n)' opacity='0.6'/></svg>");
}

/* Nav */
nav{position:fixed;top:16px;left:0;right:0;z-index:100;display:flex;align-items:center;justify-content:center}
.nav-in{
  max-width:var(--maxw);width:calc(100% - 64px);
  display:flex;align-items:center;justify-content:space-between;
  padding:10px 14px 10px 18px;
  background:rgba(10,14,26,.6);backdrop-filter:blur(20px) saturate(160%);-webkit-backdrop-filter:blur(20px) saturate(160%);
  border:1px solid var(--border);border-radius:999px;
  box-shadow:0 8px 32px -10px rgba(0,0,0,.5),inset 0 1px 0 rgba(255,255,255,.06);
}
.nav-in a.logo{font-family:var(--font-m);font-size:13px;font-weight:500;color:var(--text-2);display:flex;align-items:center;gap:10px;transition:color .2s}
.nav-in a.logo:hover{color:var(--cyan)}
.nav-in a.logo .dot{width:8px;height:8px;border-radius:50%;background:var(--cyan);box-shadow:0 0 12px var(--cyan),0 0 24px rgba(0,229,255,.5);animation:pulse 2.4s ease-in-out infinite}
.nav-links{display:flex;gap:6px;align-items:center;font-size:13.5px;font-weight:500}
.nav-links a{
  padding:7px 14px;border-radius:999px;
  color:var(--text-2);transition:all .25s ease;
}
.nav-links a:hover{color:var(--text);background:var(--surface-2)}
.menu-btn{display:none;background:none;border:none;cursor:pointer;font-size:20px;color:var(--text)}
.nav-right{display:flex;align-items:center;gap:8px}
@keyframes pulse{50%{box-shadow:0 0 16px var(--cyan),0 0 40px rgba(0,229,255,.7);opacity:.8}}
.lang-btn{
  font-family:var(--font-m);font-size:11px;
  padding:6px 12px;border-radius:999px;
  background:var(--surface);border:1px solid var(--border);
  color:var(--text-2);cursor:pointer;transition:all .25s;letter-spacing:.04em;
}
.lang-btn:hover{color:var(--cyan);border-color:var(--cyan-soft);background:var(--cyan-soft)}

/* Article */
article{position:relative;z-index:2;max-width:var(--maxw);margin:0 auto;padding:0 48px}
.art-header{padding:140px 0 48px;text-align:center}
.art-header .hero-img{width:100%;border-radius:16px;margin-bottom:32px;border:1px solid var(--border);box-shadow:0 20px 60px -15px rgba(0,0,0,.5)}
.art-header .tag{
  font-family:var(--font-m);font-size:11px;letter-spacing:.06em;
  color:var(--violet);background:var(--violet-soft);
  padding:5px 14px;border-radius:999px;display:inline-block;margin-bottom:18px;
}
.art-header h1{
  font-family:var(--font-h);font-weight:700;
  font-size:clamp(28px,5vw,42px);line-height:1.2;
  letter-spacing:-.02em;margin-bottom:16px;
}
.art-header .meta{color:var(--text-3);font-size:14px;font-family:var(--font-m);letter-spacing:.02em}

/* Prose */
.prose{padding-bottom:100px}
.prose h2{
  font-family:var(--font-h);font-weight:600;font-size:clamp(24px,3.5vw,30px);
  margin:56px 0 28px;letter-spacing:-.015em;
  padding-left:18px;border-left:3px solid var(--cyan);
}
.prose h3{
  font-family:var(--font-h);font-weight:600;font-size:20px;
  margin:44px 0 18px;color:var(--text);
}
.prose p{margin-bottom:28px;color:var(--text-2)}
.prose strong{color:var(--text);font-weight:600}
.prose a{color:var(--cyan);border-bottom:1px solid rgba(0,229,255,.3);transition:border-color .2s}
.prose a:hover{border-color:var(--cyan)}
.prose ul,.prose ol{margin:20px 0 32px 24px;color:var(--text-2)}
.prose li{margin-bottom:10px;line-height:1.8}
.prose li::marker{color:var(--cyan)}

/* Code blocks */
.prose pre{
  background:#0D1117;border:1px solid var(--border-2);border-radius:12px;
  padding:24px 28px;margin:28px 0 36px;overflow-x:auto;white-space:pre-wrap;word-break:break-word;
  font-family:var(--font-m);font-size:13.5px;line-height:1.8;
  color:#C9D1D9;
  box-shadow:0 8px 24px -8px rgba(0,0,0,.4);
  position:relative;
}
.prose pre::before{
  content:attr(data-lang);position:absolute;top:10px;right:14px;
  font-size:10px;color:var(--text-3);text-transform:uppercase;letter-spacing:.06em;
}
.prose code{
  font-family:var(--font-m);font-size:.9em;
  background:var(--surface-2);padding:3px 8px;border-radius:5px;
  color:var(--amber);
}
.prose pre code{background:none;padding:0;color:inherit;border-radius:0}

/* Callout boxes */
.callout{
  border-radius:14px;padding:24px 28px;margin:32px 0;
  border:1px solid var(--border-2);
  display:flex;gap:16px;align-items:flex-start;
}
.callout .icon{font-size:22px;flex-shrink:0;margin-top:3px}
.callout.tip{background:var(--cyan-soft);border-color:rgba(0,229,255,.2)}
.callout.tip .icon{color:var(--cyan)}
.callout.warn{background:var(--amber-soft);border-color:rgba(245,158,11,.2)}
.callout.warn .icon{color:var(--amber)}
.callout.info{background:var(--violet-soft);border-color:rgba(168,85,247,.2)}
.callout.info .icon{color:var(--violet)}
.callout.success{background:rgba(52,211,153,.1);border-color:rgba(52,211,153,.2)}
.callout.success .icon{color:var(--green)}
.callout p{margin:0;color:var(--text-2);font-size:14.5px;line-height:1.7}
.callout strong{color:var(--text)}

/* Steps */
.steps{counter-reset:step;margin:36px 0}
.step{
  counter-increment:step;
  margin-bottom:24px;
  padding:28px 28px 28px 0;background:var(--surface);
  border:1px solid var(--border);border-radius:14px;
  transition:border-color .3s;
  position:relative;
}
.step:hover{border-color:var(--border-2)}
.step-num{display:none}
.step::before{
  content:counter(step);position:absolute;top:28px;left:-20px;
  width:40px;height:40px;border-radius:12px;
  display:flex;align-items:center;justify-content:center;
  font-family:var(--font-m);font-size:15px;font-weight:600;
  background:linear-gradient(135deg,var(--cyan),var(--violet));color:#0A0E1A;
  box-shadow:0 4px 16px -4px rgba(0,229,255,.3);
}
.step h3,.step h4{font-family:var(--font-h);font-weight:600;font-size:19px;margin-bottom:10px;color:var(--text);padding-left:52px}
.step p{margin:0 0 16px;color:var(--text-2);font-size:15px;line-height:1.75;padding-left:52px}
.step pre{margin-left:52px}
.step .callout{margin:16px 0 0 52px}

/* Comparison */
.compare{display:grid;grid-template-columns:1fr 1fr;gap:20px;margin:32px 0}
.compare .col{padding:24px;border-radius:14px;border:1px solid var(--border);overflow:hidden}
.compare .col.bad{background:rgba(239,68,68,.06);border-color:rgba(239,68,68,.15)}
.compare .col.good{background:rgba(52,211,153,.06);border-color:rgba(52,211,153,.15)}
.compare .col h4{font-family:var(--font-m);font-size:12px;letter-spacing:.06em;margin-bottom:14px;text-transform:uppercase}
.compare .col.bad h4{color:#EF4444}
.compare .col.good h4{color:var(--green)}
.compare .col p{margin:0;font-size:15px;color:var(--text-2);line-height:1.75}

/* Blockquote */
.prose blockquote{
  border-left:3px solid var(--violet);
  padding:20px 24px;margin:32px 0;
  background:var(--violet-soft);border-radius:0 12px 12px 0;
  color:var(--text-2);font-style:italic;
}

/* Highlight box */
.highlight{
  background:linear-gradient(135deg,var(--cyan-soft),var(--violet-soft));
  border:1px solid var(--border-2);border-radius:14px;
  padding:28px 32px;margin:36px 0;
}
.highlight p{margin:0;color:var(--text);font-size:16px;line-height:1.75}

/* Inline image in article */
.art-img{margin:36px 0;border-radius:14px;border:1px solid var(--border);overflow:hidden}
.art-img img{width:100%;border-radius:0}
.art-img .caption{text-align:center;padding:12px 16px;font-size:12.5px;color:var(--text-3);font-family:var(--font-m);background:var(--surface)}

/* Divider */
.prose hr{border:none;height:1px;background:linear-gradient(90deg,transparent,var(--border-2),transparent);margin:48px 0}

/* Table */
.prose table{width:100%;border-collapse:collapse;margin:28px 0;font-size:14.5px}
.prose th,.prose td{padding:12px 16px;text-align:left;border-bottom:1px solid var(--border)}
.prose th{color:var(--text);font-weight:600;font-size:13px;background:var(--surface)}
.prose td{color:var(--text-2)}
.prose tr:hover td{background:var(--surface)}

/* Footer */
.foot-link{
  position:relative;z-index:2;
  max-width:var(--maxw);margin:0 auto;
  padding:0 24px 60px;text-align:center;
}
.foot-link a{
  font-family:var(--font-m);font-size:13px;
  color:var(--text-2);display:inline-flex;align-items:center;gap:8px;
  padding:12px 24px;border:1px solid var(--border);border-radius:999px;
  background:var(--surface);transition:all .25s;
}
.foot-link a:hover{color:var(--cyan);border-color:var(--cyan);background:var(--cyan-soft)}

/* Lang */
[data-lang="en"] .zh-only{display:none!important}
[data-lang="zh"] .en-only{display:none!important}

/* Reveal */
.reveal{opacity:0;transform:translateY(24px);transition:opacity .7s,transform .7s}
.reveal.in,.reveal.visible{opacity:1;transform:none}

/* Responsive */
@media(max-width:900px){
  body{font-size:15px;line-height:1.8}
  .art-header{padding:130px 0 28px}
  .art-header h1{font-size:clamp(20px,5.5vw,28px)}
  .art-header .meta{font-size:12px}
  article{padding:0 20px}
  .prose h2{font-size:18px;margin:32px 0 14px;padding-left:14px}
  .prose h3{font-size:16px;margin:36px 0 12px}
  .prose p{margin-bottom:22px;font-size:14px}
  .prose pre{font-size:11.5px;padding:14px;line-height:1.6}
  .prose ul,.prose ol{margin:16px 0 24px 18px}
  .compare{grid-template-columns:1fr}
  .compare .col{padding:16px}
  .compare .col h4{font-size:11px}
  .compare .col p{font-size:13px}
  .step{padding:24px 20px 24px 0}
  .step::before{width:34px;height:34px;font-size:13px;top:24px;left:-16px}
  .step h3,.step h4{padding-left:42px;font-size:17px}
  .step p{padding-left:42px;font-size:14px}
  .step pre{margin-left:42px}
  .step .callout{margin-left:42px}
  .prose table{font-size:12.5px;display:block;overflow-x:auto;-webkit-overflow-scrolling:touch}
  .prose th,.prose td{padding:8px 10px}
  .nav-links{display:none}
  .menu-btn{display:block}
  .nav-links.open{
    display:flex;flex-direction:column;gap:4px;
    position:absolute;top:64px;left:16px;right:16px;
    background:rgba(10,14,26,.95);
    backdrop-filter:blur(20px);
    padding:16px;border-radius:16px;
    border:1px solid var(--border);
  }
  .nav-in{width:calc(100% - 44px);padding:8px 10px 8px 14px}
  .logo{font-size:12px}
  .lang-btn{font-size:10px;padding:5px 10px}
}
@media(max-width:500px){
  body{font-size:14px;line-height:1.75}
  .art-header{padding:100px 0 20px}
  .art-header h1{font-size:clamp(18px,5vw,24px)}
  .art-header .meta{font-size:11px}
  .prose h2{font-size:16px;padding-left:12px;margin:28px 0 12px}
  .prose h3{font-size:14.5px;margin:32px 0 10px}
  .prose p{margin-bottom:18px;font-size:13px}
  .callout{padding:12px 14px;gap:8px;font-size:12px}
  .callout .icon{font-size:15px}
  .step{padding:18px 14px 18px 0}
  .step::before{width:28px;height:28px;font-size:11px;left:-12px}
  .step h3,.step h4{padding-left:34px;font-size:14.5px}
  .step p{padding-left:34px;font-size:12.5px}
  .step pre{margin-left:34px}
  .step .callout{margin-left:34px}
  .highlight{padding:14px 16px}
  .highlight p{font-size:13px}
  .prose pre{font-size:11px;padding:12px;line-height:1.55}
  .compare .col{padding:14px;border-radius:12px}
  .compare .col h4{font-size:10.5px}
  .compare .col p{font-size:12px}
  .prose blockquote{padding:14px 16px;margin:24px 0}
  .prose table{font-size:11.5px}
  .prose th,.prose td{padding:6px 8px}
}
@media(prefers-reduced-motion:reduce){*{animation:none!important;transition:none!important}.reveal{opacity:1;transform:none}}