:root{
  --bg:#0A1F44;
  --bg-deep:#07162E;
  --surface:#1B2A4A;
  --glass:rgba(255,255,255,0.08);
  --purple:#6A0DAD;
  --cyan:#00FFFF;
  --text:#FFFFFF;
  --muted:#A0B0C0;
  --success:#4CAF50;
  --warning:#FFB800;
  --gradient:linear-gradient(135deg,#6A0DAD 0%,#00FFFF 100%);
  --font-heading:'Rajdhani','Exo 2','Bahnschrift','DIN Alternate','PingFang SC','Microsoft YaHei',sans-serif;
  --font-body:'Inter','PingFang SC','Microsoft YaHei','Noto Sans CJK SC',sans-serif;
  --max-width:1280px;
  --radius:12px;
  --shadow:0 20px 60px rgba(0,0,0,0.35);
}

*,*::before,*::after{box-sizing:border-box;}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%;}
body{
  margin:0;
  font-family:var(--font-body);
  font-size:16px;
  line-height:1.7;
  color:var(--text);
  background:var(--bg);
  background-image:
    radial-gradient(1200px 600px at 85% -10%,rgba(106,13,173,0.28),transparent 60%),
    radial-gradient(900px 500px at 0% 110%,rgba(0,255,255,0.08),transparent 60%);
  min-height:100vh;
}
img,svg{display:block;max-width:100%;}
h1,h2,h3,h4,h5,h6{
  font-family:var(--font-heading);
  font-weight:700;
  line-height:1.15;
  color:var(--text);
  margin:0 0 0.5em;
}
h1{font-size:clamp(2.5rem,6vw,4.5rem);}
h2{font-size:clamp(2rem,4vw,3rem);}
h3{font-size:clamp(1.4rem,2.4vw,2rem);}
h4{font-size:1.25rem;}
p{margin:0 0 1rem;}
a{color:var(--cyan);text-decoration-thickness:0.08em;text-underline-offset:0.18em;}
a:hover{color:#fff;}
::selection{background:var(--cyan);color:#07162E;}
:focus-visible{outline:2px solid var(--cyan);outline-offset:2px;border-radius:3px;}
.main-content{display:block;min-height:60vh;}
.container{max-width:var(--max-width);margin-inline:auto;padding-inline:clamp(1rem,3vw,2rem);}

.skip-link{
  position:absolute;
  left:1rem;
  top:-100%;
  z-index:300;
  background:var(--cyan);
  color:var(--bg-deep);
  font-weight:700;
  padding:0.6rem 1.1rem;
  border-radius:0 0 8px 8px;
  text-decoration:none;
  transition:top 0.2s;
}
.skip-link:focus{top:0;color:var(--bg-deep);}

.site-header{
  position:sticky;
  top:0;
  z-index:100;
  background:rgba(10,31,68,0.92);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  border-bottom:1px solid rgba(0,255,255,0.16);
  box-shadow:0 8px 30px rgba(0,0,0,0.2);
}
.header-inner{padding-block:0.75rem;}
.masthead{
  display:grid;
  grid-template-columns:1fr auto 1fr;
  gap:1rem;
  align-items:center;
}
.masthead-meta{justify-self:start;min-width:0;}
.masthead-status{
  display:inline-flex;
  align-items:center;
  gap:0.45rem;
  color:var(--muted);
  font-size:0.8rem;
  font-weight:600;
  letter-spacing:0.04em;
}
.status-dot{
  width:8px;
  height:8px;
  border-radius:50%;
  background:var(--success);
  display:inline-block;
  animation:statusPulse 2s infinite;
}
@keyframes statusPulse{
  0%,100%{box-shadow:0 0 0 2px rgba(76,175,80,0.25);}
  50%{box-shadow:0 0 0 6px rgba(76,175,80,0);}
}
.brand{
  display:inline-flex;
  align-items:center;
  gap:0.8rem;
  text-decoration:none;
  color:var(--text);
  justify-self:center;
}
.brand:hover{color:var(--text);}
.brand-mark{
  width:44px;
  height:44px;
  display:grid;
  place-items:center;
  background:var(--gradient);
  clip-path:polygon(50% 0,100% 25%,100% 75%,50% 100%,0 75%,0 25%);
  font-family:var(--font-heading);
  font-weight:700;
  font-size:1.2rem;
  color:var(--bg-deep);
  flex:none;
}
.brand-text{display:flex;flex-direction:column;min-width:0;}
.brand-name{
  font-family:var(--font-heading);
  font-size:1.45rem;
  font-weight:700;
  letter-spacing:0.04em;
  line-height:1.05;
  text-transform:uppercase;
}
.brand-tagline{
  font-size:0.7rem;
  letter-spacing:0.16em;
  text-transform:uppercase;
  color:var(--muted);
  margin-top:0.15rem;
  white-space:nowrap;
}
.header-actions{
  display:flex;
  align-items:center;
  gap:0.6rem;
  justify-self:end;
  min-width:0;
}
.version-chip{
  display:inline-flex;
  align-items:center;
  gap:0.4rem;
  padding:0.35rem 0.7rem;
  border-radius:999px;
  border:1px solid rgba(0,255,255,0.28);
  background:rgba(0,255,255,0.06);
  color:var(--cyan);
  font-size:0.75rem;
  font-weight:600;
  text-decoration:none;
  white-space:nowrap;
}
.version-chip:hover{background:rgba(0,255,255,0.14);color:var(--cyan);}
.version-icon{font-family:var(--font-heading);font-weight:700;}
.nav-wrap{position:relative;margin-top:0.5rem;display:flex;justify-content:flex-end;}
.nav-toggle{
  display:inline-flex;
  align-items:center;
  gap:0.5rem;
  background:transparent;
  border:1px solid rgba(255,255,255,0.18);
  border-radius:8px;
  color:var(--text);
  font-family:var(--font-body);
  font-size:0.9rem;
  font-weight:600;
  padding:0.55rem 0.9rem;
  cursor:pointer;
  line-height:1;
}
.nav-toggle-box{position:relative;display:block;width:20px;height:16px;}
.nav-toggle-line{
  position:absolute;
  left:0;
  width:100%;
  height:2px;
  background:currentColor;
  border-radius:2px;
  transition:top 0.2s,transform 0.2s,opacity 0.2s;
}
.nav-toggle-line:nth-child(1){top:0;}
.nav-toggle-line:nth-child(2){top:7px;}
.nav-toggle-line:nth-child(3){top:14px;}
.nav-toggle[aria-expanded="true"] .nav-toggle-line:nth-child(1){top:7px;transform:rotate(45deg);}
.nav-toggle[aria-expanded="true"] .nav-toggle-line:nth-child(2){opacity:0;}
.nav-toggle[aria-expanded="true"] .nav-toggle-line:nth-child(3){top:7px;transform:rotate(-45deg);}
.nav-toggle-label{color:var(--muted);}
.site-nav{display:none;width:100%;}
.site-nav[data-open]{
  display:block;
  position:absolute;
  top:calc(100% + 0.6rem);
  left:0;
  right:0;
  background:rgba(7,22,46,0.97);
  border:1px solid rgba(0,255,255,0.18);
  border-radius:0 0 14px 14px;
  box-shadow:var(--shadow);
  padding:0.6rem 1.25rem 1.25rem;
}
.nav-list{list-style:none;margin:0;padding:0;}
.site-nav .nav-list{padding:0.25rem 0;}
.nav-list a{
  display:block;
  padding:0.65rem 0.25rem;
  border-bottom:1px solid rgba(255,255,255,0.06);
  color:var(--text);
  text-decoration:none;
  font-weight:600;
  letter-spacing:0.02em;
  transition:color 0.2s,padding-left 0.2s;
}
.nav-list a:hover{color:var(--cyan);padding-left:0.45rem;}
.nav-list a[aria-current="page"]{color:var(--cyan);}

.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:0.5rem;
  padding:0.75rem 1.25rem;
  border-radius:8px;
  border:1px solid transparent;
  font-family:var(--font-body);
  font-size:1rem;
  font-weight:600;
  line-height:1;
  text-decoration:none;
  cursor:pointer;
  background:var(--surface);
  color:var(--text);
  transition:background 0.2s,box-shadow 0.2s,border-color 0.2s,color 0.2s;
}
.btn:hover{text-decoration:none;}
.btn-primary{background:var(--purple);color:#fff;box-shadow:inset 0 0 0 1px rgba(255,255,255,0.12);}
.btn-primary:hover{background:#7B1FD6;color:#fff;box-shadow:0 0 22px rgba(106,13,173,0.45);}
.btn-ghost{background:transparent;border-color:rgba(255,255,255,0.28);color:var(--text);}
.btn-ghost:hover{border-color:var(--cyan);color:var(--cyan);}
.btn-outline-cyan{background:transparent;border-color:rgba(0,255,255,0.4);color:var(--cyan);}
.btn-outline-cyan:hover{background:rgba(0,255,255,0.12);color:var(--cyan);}
.btn-sm{padding:0.5rem 0.9rem;font-size:0.85rem;border-radius:6px;}
.btn-lg{padding:1rem 2rem;font-size:1.05rem;border-radius:10px;}

.section{padding-block:clamp(3rem,8vw,6rem);}
.section-head{max-width:820px;margin-bottom:2.5rem;}
.eyebrow{
  display:inline-block;
  color:var(--cyan);
  font-size:0.82rem;
  font-weight:700;
  letter-spacing:0.18em;
  text-transform:uppercase;
  margin-bottom:0.6rem;
}
.prose{max-width:72ch;}
.prose p{margin-bottom:1.1rem;}
.prose ul,.prose ol{padding-left:1.3rem;margin-bottom:1.1rem;color:var(--text);}
.prose li{margin-bottom:0.45rem;}

.hero{
  display:grid;
  gap:2rem;
  align-items:center;
  grid-template-columns:1fr;
}
.hero-copy{min-width:0;}
.hero-visual{position:relative;min-width:0;}
.split-grid{
  display:grid;
  gap:clamp(1.5rem,4vw,3rem);
  grid-template-columns:1fr;
}
.grid-2{display:grid;gap:clamp(1.25rem,3vw,2.5rem);grid-template-columns:1fr;}
.grid-3{display:grid;gap:1.25rem;grid-template-columns:1fr;}
.grid-auto{display:grid;gap:1rem;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));}
.stack > * + *{margin-top:1.25rem;}
.rule-line{
  height:1px;
  border:0;
  background:linear-gradient(90deg,transparent,rgba(0,255,255,0.45),rgba(106,13,173,0.45),transparent);
}

.card{
  background:var(--surface);
  border:1px solid rgba(255,255,255,0.07);
  border-radius:var(--radius);
  padding:clamp(1.25rem,2.5vw,2rem);
}
.card-glass{
  background:var(--glass);
  backdrop-filter:blur(12px);
  -webkit-backdrop-filter:blur(12px);
  border:1px solid rgba(255,255,255,0.1);
  border-radius:var(--radius);
  padding:clamp(1.25rem,2.5vw,2rem);
}
.card-highlight{
  border-color:rgba(0,255,255,0.3);
  box-shadow:0 0 30px rgba(0,255,255,0.08);
}

.panel{
  background:var(--surface);
  border:1px solid rgba(255,255,255,0.08);
  border-radius:var(--radius);
  overflow:hidden;
}
.panel + .panel{margin-top:1rem;}
.panel summary{
  display:flex;
  align-items:center;
  justify-content:space-between;
  cursor:pointer;
  list-style:none;
  padding:1.2rem 1.5rem;
  color:var(--text);
  font-weight:600;
  font-size:1.05rem;
  transition:color 0.2s;
}
.panel summary::-webkit-details-marker{display:none;}
.panel summary::after{
  content:"+";
  color:var(--cyan);
  font-size:1.4rem;
  transition:transform 0.2s;
}
.panel[open] summary{color:var(--cyan);}
.panel[open] summary::after{transform:rotate(45deg);}
.panel p{margin:0;padding:0 1.5rem 1.5rem;color:var(--muted);}

.tag{
  display:inline-flex;
  align-items:center;
  gap:0.4em;
  padding:0.3em 0.8em;
  border-radius:999px;
  border:1px solid rgba(255,255,255,0.18);
  background:var(--glass);
  color:var(--text);
  font-size:0.8rem;
  font-weight:600;
}
.tag-cyan{border-color:rgba(0,255,255,0.35);color:var(--cyan);}
.tag-purple{border-color:rgba(106,13,173,0.6);color:#fff;}

.stat-grid{display:grid;gap:1rem;grid-template-columns:repeat(2,1fr);}
.stat-card{
  background:var(--surface);
  border:1px solid rgba(255,255,255,0.07);
  border-radius:var(--radius);
  padding:1.5rem;
}
.stat-number{
  font-family:var(--font-heading);
  font-size:clamp(2rem,4vw,3.2rem);
  font-weight:700;
  line-height:1;
  color:var(--cyan);
}
.stat-label{color:var(--muted);margin-top:0.4rem;font-size:0.95rem;}

.media-frame{
  position:relative;
  display:block;
  aspect-ratio:16/9;
  border-radius:var(--radius);
  overflow:hidden;
  background:var(--surface);
  border:1px solid rgba(255,255,255,0.08);
}
.media-frame::before{
  content:"";
  position:absolute;
  inset:0;
  background:
    linear-gradient(135deg,rgba(106,13,173,0.3),rgba(0,255,255,0.08)),
    repeating-linear-gradient(45deg,transparent 0 12px,rgba(255,255,255,0.025) 12px 13px);
}
.media-frame-4-3{aspect-ratio:4/3;}
.media-frame-21-9{aspect-ratio:21/9;}
.media-frame img{
  position:absolute;
  inset:0;
  width:100%;
  height:100%;
  object-fit:cover;
  z-index:1;
}

.breadcrumb{
  display:flex;
  flex-wrap:wrap;
  gap:0.45rem;
  list-style:none;
  padding:1rem 0;
  margin:0;
  color:var(--muted);
  font-size:0.9rem;
}
.breadcrumb li+li::before{content:"/";margin-right:0.45rem;color:rgba(255,255,255,0.3);}
.breadcrumb a{color:var(--muted);text-decoration:none;}
.breadcrumb a:hover{color:var(--cyan);}
.breadcrumb [aria-current="page"]{color:var(--text);font-weight:600;}

.reading-progress{
  position:fixed;
  top:0;
  left:0;
  width:100%;
  height:3px;
  background:rgba(255,255,255,0.08);
  z-index:1000;
  pointer-events:none;
}
.reading-progress-bar{
  display:block;
  width:100%;
  height:100%;
  background:var(--gradient);
  transform-origin:0 50%;
  transform:scaleX(0);
}
.to-top-button{
  position:fixed;
  right:1rem;
  bottom:1rem;
  z-index:90;
  display:inline-flex;
  align-items:center;
  gap:0.45rem;
  padding:0.6rem 1rem;
  border-radius:8px;
  border:1px solid rgba(0,255,255,0.35);
  background:var(--surface);
  color:var(--cyan);
  font-family:var(--font-body);
  font-size:0.88rem;
  font-weight:600;
  cursor:pointer;
  opacity:0;
  visibility:hidden;
  transform:translateY(0.6rem);
  transition:opacity 0.2s,transform 0.2s,visibility 0.2s,background 0.2s;
}
.to-top-button:hover{background:rgba(0,255,255,0.14);color:var(--cyan);}
.to-top-button.is-visible{opacity:1;visibility:visible;transform:none;}

.js [data-reveal]{
  opacity:0;
  transform:translateY(1rem);
  transition:opacity 0.55s ease,transform 0.55s ease;
}
.js [data-reveal].is-visible{opacity:1;transform:none;}

.site-footer{
  position:relative;
  overflow:hidden;
  margin-top:4rem;
  background:var(--bg-deep);
  border-top:1px solid rgba(106,13,173,0.45);
}
.site-footer::before{
  content:"";
  position:absolute;
  inset:0;
  background:radial-gradient(800px 400px at 85% 0%,rgba(106,13,173,0.28),transparent 60%);
  pointer-events:none;
}
.footer-grid{
  position:relative;
  display:grid;
  gap:2rem;
  grid-template-columns:1fr;
  padding-block:clamp(2.5rem,6vw,4.5rem) 2.5rem;
}
.footer-brand p{color:var(--muted);font-size:0.95rem;max-width:40ch;}
.site-footer .brand{justify-self:start;margin-bottom:1rem;}
.footer-title{
  font-size:0.85rem;
  font-weight:700;
  letter-spacing:0.16em;
  text-transform:uppercase;
  color:var(--cyan);
  margin-bottom:1rem;
}
.footer-links{list-style:none;margin:0;padding:0;}
.footer-links li{margin-bottom:0.35rem;}
.footer-links a{
  display:inline-block;
  color:#fff;
  text-decoration:none;
  font-weight:500;
  padding:0.25em 0;
  transition:color 0.2s,padding-left 0.2s;
}
.footer-links a:hover{color:var(--cyan);padding-left:0.3em;}
.footer-links a[aria-current="page"]{color:var(--cyan);}
.footer-contact p{color:var(--muted);line-height:1.85;font-size:0.95rem;}
.service-note{
  color:var(--cyan);
  font-size:0.88rem;
  font-weight:600;
  border-left:3px solid var(--cyan);
  padding-left:0.7rem;
}
.trust-statement{
  font-size:0.88rem;
  color:var(--muted);
  background:rgba(255,255,255,0.04);
  border:1px solid rgba(255,255,255,0.07);
  border-radius:10px;
  padding:0.9rem 1rem;
}
.footer-meta{
  position:relative;
  display:flex;
  flex-wrap:wrap;
  gap:0.8rem 1.5rem;
  justify-content:space-between;
  align-items:center;
  border-top:1px solid rgba(255,255,255,0.08);
  padding-block:1.1rem;
  color:var(--muted);
  font-size:0.85rem;
}

@media (max-width:760px){
  .masthead{gap:0.5rem;}
  .version-chip{display:none;}
  .brand-name{font-size:1.15rem;}
  .brand-mark{width:36px;height:36px;font-size:1rem;}
  .brand-tagline{display:none;}
  .header-actions .btn-sm{padding:0.45rem 0.65rem;font-size:0.78rem;}
  .masthead-meta{font-size:0.72rem;}
  .nav-wrap{justify-content:flex-end;}
}

@media (min-width:821px){
  .footer-grid{grid-template-columns:1.8fr 1fr 1fr 1.4fr;}
}

@media (min-width:900px){
  .hero{grid-template-columns:1.05fr 0.95fr;}
  .split-grid{grid-template-columns:0.9fr 1.1fr;}
}

@media (min-width:961px){
  .grid-2{grid-template-columns:1fr 1fr;}
  .grid-3{grid-template-columns:repeat(3,1fr);}
  .stat-grid{grid-template-columns:repeat(4,1fr);}
  .nav-wrap{justify-content:center;}
  .nav-toggle{display:none;}
  .site-nav{display:block;}
  .site-nav .nav-list{display:flex;justify-content:center;gap:0;padding:0;}
  .nav-list a{
    padding:0.8rem 1.1rem 0.9rem;
    border-bottom:3px solid transparent;
    border-bottom-style:solid;
    font-size:0.98rem;
  }
  .nav-list a:hover{
    color:var(--cyan);
    padding-left:1.1rem;
    border-bottom-color:rgba(0,255,255,0.55);
  }
  .nav-list a[aria-current="page"]{
    color:var(--cyan);
    border-bottom-color:var(--cyan);
  }
}

@media (max-width:520px){
  .masthead-meta{display:none;}
  .masthead{grid-template-columns:1fr auto 1fr;}
  .to-top-button{padding:0.5rem 0.8rem;font-size:0.8rem;}
}

@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto;}
  *,*::before,*::after{
    animation-duration:0.01ms !important;
    animation-iteration-count:1 !important;
    transition-duration:0.01ms !important;
  }
  .js [data-reveal]{opacity:1;transform:none;transition:none;}
}