:root{
  --bg-deep:#08070D;
  --bg-dark:#0D0B14;
  --bg-panel:#151221;
  --bg-elev:#1D182B;
  --ink-main:#F5F0E8;
  --ink-sub:#B0A8BD;
  --ink-muted:#7B7490;
  --paper:#F5F0E8;
  --line-soft:rgba(197,189,212,.16);
  --line-mid:rgba(197,189,212,.3);
  --purple:#BE50F4;
  --blue:#00D4FF;
  --orange:#FF7A1A;
  --red:#FF3B5C;
  --gold:#F0B90B;
  --grad-main:linear-gradient(135deg,#BE50F4,#00D4FF);
  --grad-hot:linear-gradient(135deg,#FF7A1A,#FF3B5C);
  --rad:6px;
  --font-display:Impact,'Arial Black','Haettenschweiler','PingFang SC','Microsoft YaHei',sans-serif;
  --font-body:-apple-system,BlinkMacSystemFont,'Segoe UI','Helvetica Neue','PingFang SC','Microsoft YaHei',sans-serif;
  --font-mono:'SF Mono','Cascadia Mono',Consolas,'Roboto Mono',monospace;
  --shadow-card:0 12px 30px rgba(0,0,0,.45);
  --ease:cubic-bezier(.22,1,.36,1);
  --header-h:78px;
  --content-gutter:clamp(1rem,3vw,2rem);
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;line-height:1.5;scroll-behavior:smooth}
body,h1,h2,h3,h4,p,figure,blockquote,dl,dd,ul,ol{margin:0}
body{
  min-height:100vh;
  background:var(--bg-deep);
  color:var(--ink-main);
  font-family:var(--font-body);
  font-size:1rem;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img,picture,svg,canvas,video{display:block;max-width:100%}
input,button,textarea,select{font:inherit;color:inherit}
ul,ol{list-style:none;padding:0;margin:0}
a{color:var(--blue);text-decoration:none}
a:hover{color:var(--purple)}
:focus-visible{outline:2px solid var(--blue);outline-offset:3px;border-radius:2px}
::selection{background:var(--purple);color:#fff}
.container{max-width:1240px;margin-inline:auto;padding-inline:var(--content-gutter)}
.main-content{width:100%}
.display-title{
  font-family:var(--font-display);
  font-weight:700;
  font-size:clamp(2.5rem,7vw,4.5rem);
  letter-spacing:.03em;
  line-height:1.05;
  text-transform:uppercase;
}
.section-title{
  font-family:var(--font-display);
  font-weight:700;
  font-size:clamp(1.4rem,3vw,2rem);
  letter-spacing:.05em;
  line-height:1.2;
}
.eyebrow{
  font-family:var(--font-mono);
  font-size:.875rem;
  color:var(--orange);
  letter-spacing:.18em;
  text-transform:uppercase;
}
.grid{display:grid;gap:1.5rem}
.grid-2{grid-template-columns:repeat(2,minmax(0,1fr))}
.grid-3{grid-template-columns:repeat(3,minmax(0,1fr))}
.grid-4{grid-template-columns:repeat(4,minmax(0,1fr))}
@media(max-width:920px){
  .grid-3,.grid-4{grid-template-columns:repeat(2,1fr)}
}
@media(max-width:600px){
  .grid-2,.grid-3,.grid-4{grid-template-columns:1fr}
}
.card{
  background:var(--bg-panel);
  border:1px solid var(--line-soft);
  border-radius:var(--rad);
  padding:1.5rem;
  box-shadow:var(--shadow-card);
}
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:.5rem;
  padding:.65rem 1.3rem;
  border-radius:999px;
  border:1px solid transparent;
  font-weight:600;
  font-size:.95rem;
  line-height:1.2;
  cursor:pointer;
  transition:transform .2s var(--ease),box-shadow .2s var(--ease),border-color .2s;
  text-decoration:none;
}
.btn-primary{background:var(--grad-hot);color:#fff;box-shadow:0 8px 22px rgba(255,90,30,.3)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 12px 28px rgba(0,212,255,.35);color:#fff}
.btn-outline{background:transparent;border-color:var(--line-mid);color:var(--ink-main)}
.btn-outline:hover{border-color:var(--blue);color:var(--blue);transform:translateY(-2px)}
.breadcrumb{
  display:flex;
  flex-wrap:wrap;
  gap:.4rem .75rem;
  padding-block:1rem;
  font-size:.875rem;
  color:var(--ink-muted);
}
.breadcrumb ol{display:flex;flex-wrap:wrap;gap:.4rem .75rem;list-style:none;padding:0;margin:0}
.breadcrumb li+li::before{content:"/";margin-right:.75rem;color:var(--ink-muted)}
.breadcrumb a{color:var(--ink-sub)}
.breadcrumb a:hover{color:var(--blue)}
.breadcrumb [aria-current="page"]{color:var(--orange);font-weight:600}
.divider{height:1px;background:linear-gradient(90deg,transparent,var(--line-mid),transparent);border:0;margin-block:2rem}
.entry-list{display:grid;gap:1rem}
.entry-item{
  background:var(--bg-panel);
  border:1px solid var(--line-soft);
  border-left:3px solid var(--purple);
  border-radius:var(--rad);
  padding:1rem 1.25rem;
  transition:border-color .2s,transform .2s;
}
.entry-item:hover{border-left-color:var(--orange);transform:translateX(4px)}
.toc{
  border:1px solid var(--line-soft);
  background:linear-gradient(145deg,rgba(190,80,244,.08),rgba(0,212,255,.04));
  border-radius:var(--rad);
  padding:1.25rem 1.5rem;
}
.toc-title{
  font-family:var(--font-display);
  font-size:1.15rem;
  letter-spacing:.08em;
  color:var(--blue);
  margin-bottom:.75rem;
  text-transform:uppercase;
}
.toc-list{display:grid;gap:.45rem}
.toc-link{color:var(--ink-sub);font-weight:500}
.toc-link:hover,.toc-link.is-active{color:var(--orange)}
.toc-link::before{content:"◇";margin-right:.5rem;color:var(--purple)}
.skill-tree{display:grid;gap:1rem}
.skill-step{
  position:relative;
  display:flex;
  gap:1rem;
  background:var(--bg-panel);
  border:1px solid var(--line-soft);
  border-radius:var(--rad);
  padding:1.25rem;
  align-items:flex-start;
}
.skill-step-index{
  flex-shrink:0;
  display:grid;
  place-items:center;
  width:2.75rem;
  height:2.75rem;
  background:var(--grad-main);
  color:#fff;
  font-family:var(--font-mono);
  font-weight:700;
  clip-path:polygon(0 0,82% 0,100% 18%,100% 100%,18% 100%,0 82%);
}
.skill-step-body h3{font-family:var(--font-display);font-size:1.05rem;margin-bottom:.25rem}
.img-container{
  position:relative;
  width:100%;
  overflow:hidden;
  border-radius:var(--rad);
  background:
    repeating-linear-gradient(0deg,transparent,transparent 6px,rgba(255,255,255,.02) 7px),
    repeating-linear-gradient(90deg,transparent,transparent 6px,rgba(255,255,255,.02) 7px),
    linear-gradient(145deg,rgba(190,80,244,.16),rgba(0,0,0,.72));
}
.img-container img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover}
.img-container::after{content:"";position:absolute;inset:0;border:1px solid rgba(255,255,255,.08);border-radius:inherit}
.img-16x9{aspect-ratio:16/9}
.img-4x3{aspect-ratio:4/3}
.img-1x1{aspect-ratio:1/1}
.skip-link{
  position:absolute;
  left:.5rem;
  top:-100px;
  z-index:1300;
  padding:.75rem 1.25rem;
  background:var(--bg-elev);
  border:1px solid var(--blue);
  border-radius:var(--rad);
  color:var(--blue);
  font-weight:600;
  transition:top .2s;
}
.skip-link:focus{top:.5rem}
.progress-track{
  position:fixed;
  top:0;
  left:0;
  width:100%;
  height:3px;
  z-index:1200;
  pointer-events:none;
  background:transparent;
}
.progress-fill{
  display:block;
  width:0;
  height:100%;
  background:linear-gradient(90deg,var(--purple),var(--blue),var(--orange));
  box-shadow:0 0 12px rgba(0,212,255,.55);
}
.topbar{
  background:linear-gradient(90deg,rgba(190,80,244,.2),rgba(13,11,20,0) 45%),#110E1D;
  border-bottom:1px solid var(--line-soft);
  position:relative;
  overflow:hidden;
}
.topbar::before{
  content:"";
  display:flex;
  height:2px;
  background:repeating-linear-gradient(90deg,var(--orange) 0 32px,transparent 32px 58px,var(--blue) 58px 88px,transparent 88px 116px);
}
.topbar-message{
  max-width:1240px;
  margin-inline:auto;
  padding:.45rem var(--content-gutter);
  font-size:.875rem;
  color:#D8CFF0;
}
.site-header{
  position:sticky;
  top:0;
  z-index:1000;
  background:rgba(11,10,17,.96);
  border-bottom:1px solid var(--line-soft);
}
.header-main{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:1.25rem;
  max-width:1240px;
  margin-inline:auto;
  padding:0 var(--content-gutter);
  min-height:var(--header-h);
}
.brand{display:inline-flex;align-items:center;gap:.8rem;flex-shrink:0;color:var(--ink-main)}
.brand:hover{color:var(--ink-main)}
.brand-badge{
  display:grid;
  place-items:center;
  width:46px;
  height:46px;
  background:var(--grad-main);
  color:#fff;
  font-family:var(--font-display);
  font-weight:700;
  font-size:1.2rem;
  letter-spacing:.04em;
  clip-path:polygon(0 0,78% 0,100% 22%,100% 100%,22% 100%,0 78%);
  box-shadow:0 0 16px rgba(190,80,244,.55);
}
.brand-caption{
  font-family:var(--font-display);
  font-size:1.35rem;
  font-weight:700;
  letter-spacing:.1em;
  white-space:nowrap;
}
.site-nav{margin-left:auto}
.nav-list{display:flex;align-items:center;gap:.4rem}
.nav-link{
  position:relative;
  display:block;
  padding:.5rem .72rem;
  font-weight:500;
  font-size:.97rem;
  color:var(--ink-main);
  text-decoration:none;
  border-radius:3px;
  letter-spacing:.02em;
  transition:color .22s;
}
.nav-link:hover{color:var(--blue)}
.nav-link::after{
  content:"";
  position:absolute;
  left:.75rem;
  right:.75rem;
  bottom:.2rem;
  height:2px;
  background:var(--grad-main);
  border-radius:2px;
  transform:scaleX(0);
  transform-origin:left center;
  transition:transform .26s var(--ease);
}
.nav-link:hover::after,
.nav-link:focus-visible::after,
.nav-link[aria-current="page"]::after{transform:scaleX(1)}
.nav-link[aria-current="page"]{color:var(--blue)}
.nav-toggle{
  display:none;
  flex-shrink:0;
  flex-direction:column;
  justify-content:center;
  align-items:center;
  gap:5px;
  width:44px;
  height:44px;
  padding:0;
  background:transparent;
  border:1px solid var(--line-mid);
  border-radius:var(--rad);
  cursor:pointer;
  transition:border-color .2s,background .2s;
}
.nav-toggle:hover{background:rgba(190,80,244,.12)}
.nav-toggle-bar{display:block;width:20px;height:2px;background:var(--ink-main);border-radius:2px;transition:transform .3s var(--ease),opacity .3s,background .3s}
.nav-toggle.is-active .bar-one{transform:translateY(7px) rotate(45deg);background:var(--orange)}
.nav-toggle.is-active .bar-two{opacity:0}
.nav-toggle.is-active .bar-three{transform:translateY(-7px) rotate(-45deg);background:var(--orange)}
.site-footer{
  position:relative;
  margin-top:5rem;
  background:linear-gradient(180deg,#0C0A13,#08070D);
  border-top:1px solid var(--line-soft);
}
.site-footer::before{
  content:"";
  display:block;
  height:2px;
  background:linear-gradient(90deg,transparent,var(--purple),var(--blue),transparent);
}
.footer-grid{
  display:grid;
  grid-template-columns:1.5fr 1fr 1.4fr;
  gap:2.5rem;
  padding-block:4rem 2.5rem;
}
.footer-heading{
  font-family:var(--font-display);
  font-size:1rem;
  letter-spacing:.1em;
  text-transform:uppercase;
  color:var(--orange);
  margin-bottom:.85rem;
}
.footer-brand{
  font-family:var(--font-display);
  font-size:2rem;
  font-weight:700;
  color:var(--ink-main);
  letter-spacing:.08em;
  margin-bottom:.5rem;
}
.footer-mission{color:var(--ink-sub);font-size:.9rem;max-width:28rem}
.footer-trust{
  margin-top:1rem;
  display:inline-block;
  padding:.35rem .8rem;
  background:rgba(190,80,244,.1);
  border:1px solid var(--line-soft);
  border-radius:999px;
  font-size:.8rem;
  color:var(--ink-sub);
}
.footer-list{display:grid;gap:.5rem}
.footer-link{color:var(--ink-sub);font-weight:500;transition:color .2s,padding-left .2s}
.footer-link:hover{color:var(--blue);padding-left:.25rem}
.footer-line{color:var(--ink-sub);font-size:.92rem;line-height:1.6}
.footer-bottom{
  border-top:1px solid var(--line-soft);
  background:rgba(0,0,0,.28);
  padding-block:1.1rem;
}
.footer-bottom-inner{
  display:flex;
  flex-wrap:wrap;
  gap:.75rem 1.5rem;
  align-items:center;
  justify-content:space-between;
  font-size:.85rem;
  color:var(--ink-muted);
}
.footer-copy{color:var(--ink-sub)}
.footer-note{width:100%;font-size:.8rem}
.back-top{
  position:fixed;
  right:clamp(20px,3vw,42px);
  bottom:clamp(20px,3vw,38px);
  z-index:900;
  display:inline-flex;
  align-items:center;
  gap:.5rem;
  padding:.7rem 1.1rem .7rem .85rem;
  background:rgba(14,12,21,.9);
  border:1px solid var(--line-mid);
  border-right-color:var(--purple);
  border-bottom-color:var(--purple);
  border-radius:999px;
  color:var(--blue);
  font-weight:600;
  font-size:.88rem;
  cursor:pointer;
  box-shadow:0 8px 24px rgba(0,0,0,.5);
  opacity:0;
  visibility:hidden;
  transform:translateY(16px);
  transition:opacity .28s var(--ease),transform .28s var(--ease),visibility 0s linear .28s,background .2s,color .2s;
}
.back-top.is-visible{
  opacity:1;
  visibility:visible;
  transform:translateY(0);
  transition:opacity .28s var(--ease),transform .28s var(--ease),visibility 0s;
}
.back-top[aria-hidden="true"]{opacity:0;visibility:hidden;pointer-events:none}
.back-top:hover{background:var(--bg-elev);color:var(--orange)}
.back-top-arrow{font-size:1.1rem;line-height:1}
.sr-only{
  position:absolute;
  width:1px;
  height:1px;
  padding:0;
  margin:-1px;
  overflow:hidden;
  clip:rect(0 0 0 0);
  white-space:nowrap;
  border:0;
}
[data-reveal]{
  opacity:0;
  transform:translateY(28px);
  transition:opacity .7s var(--ease),transform .7s var(--ease);
}
[data-reveal].is-in{opacity:1;transform:none}
@media(max-width:920px){
  .header-main{min-height:64px}
  .nav-toggle{display:flex;z-index:1100}
  .site-nav{
    position:fixed;
    top:0;
    left:0;
    width:100%;
    height:100vh;
    z-index:1050;
    display:flex;
    align-items:flex-start;
    justify-content:flex-start;
    padding:96px clamp(2rem,12vw,5rem) 2rem;
    background:linear-gradient(150deg,rgba(15,12,23,.98),rgba(8,7,13,.99) 70%);
    border:none;
    box-shadow:none;
    overflow-y:auto;
    transform:translateX(100%);
    visibility:hidden;
    transition:transform .4s var(--ease),visibility 0s linear .4s;
  }
  .site-nav[data-open="true"]{
    transform:translateX(0);
    visibility:visible;
    transition:transform .4s var(--ease),visibility 0s;
  }
  .nav-list{flex-direction:column;align-items:stretch;gap:.25rem}
  .nav-link{padding:.9rem 1rem;font-size:1.15rem;border-bottom:1px solid var(--line-soft)}
  .nav-link::after{display:none}
  .footer-grid{grid-template-columns:1fr 1fr}
}
@media(max-width:600px){
  .footer-grid{grid-template-columns:1fr}
  .footer-bottom-inner{flex-direction:column;align-items:flex-start}
  .brand-caption{font-size:1.1rem}
  .brand-badge{width:40px;height:40px}
  .topbar-message{font-size:.8rem;white-space:normal}
}
@media(prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{
    animation-duration:.01ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.01ms !important;
  }
  [data-reveal]{opacity:1;transform:none}
  .progress-fill{transition:none}
  .topbar::before{display:none}
}