:root{
  --night:#0d1b2a;
  --deep:#1b263b;
  --violet:#5a189a;
  --green:#00ff87;
  --cyan:#00b4d8;
  --light:#e0e1dd;
  --green-soft:#9fffcb;
  --orange:#ff6d00;
  --radius-lg:32px;
  --radius-md:20px;
  --radius-sm:12px;
  --container:1200px;
  --font-heading:"Noto Sans CJK SC","PingFang SC","Microsoft YaHei",sans-serif;
  --font-body:"Noto Sans CJK SC","PingFang SC","Microsoft YaHei",sans-serif;
  --font-mono:"Roboto Mono","SFMono-Regular",Consolas,monospace;
  --header-h:88px;
  --ease:cubic-bezier(.2,.8,.2,1);
  --shadow:0 18px 50px rgba(0,0,0,.35);
}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;background:var(--night)}
body{
  font-family:var(--font-body);
  background:
    radial-gradient(circle at 90% 10%,rgba(90,24,154,.18),transparent 28%),
    radial-gradient(circle at 0% 80%,rgba(0,180,216,.08),transparent 30%),
    var(--night);
  color:var(--light);
  line-height:1.7;
  min-height:100vh;
  display:flex;
  flex-direction:column;
}
body.nav-lock{overflow:hidden}
img{display:block;max-width:100%;height:auto}
ul{list-style:none}
a{color:var(--cyan);text-decoration:none;transition:color .25s var(--ease)}
a:hover{color:var(--green)}
button{font-family:inherit;cursor:pointer;border:0;background:none}
:focus-visible{outline:3px solid var(--green);outline-offset:4px;border-radius:6px}
.site-skip{
  position:fixed;top:12px;left:12px;z-index:2000;
  transform:translateY(-200%);
  background:var(--green);color:#08131f;font-weight:700;
  padding:10px 20px;border-radius:999px;
  transition:transform .2s var(--ease);
}
.site-skip:focus{transform:translateY(0)}

/* header */
.site-header{
  position:sticky;top:0;z-index:100;
  background:rgba(13,27,42,.88);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  border-bottom:1px solid rgba(0,180,216,.22);
}
.header-inner{
  max-width:var(--container);margin:0 auto;padding:0 24px;
  height:var(--header-h);
  display:flex;align-items:center;justify-content:space-between;gap:24px;
}
.brand-lockup{display:flex;flex-direction:column;line-height:1.1;flex:0 0 auto}
.brand-name{
  font-family:var(--font-heading);font-weight:900;font-size:28px;
  color:#fff;letter-spacing:.04em;
}
.brand-slogan{
  font-family:var(--font-mono);font-size:11px;letter-spacing:.12em;
  color:var(--green);text-transform:uppercase;
  background:rgba(0,255,135,.08);border-radius:999px;padding:2px 10px;margin-top:3px;
}
.site-nav{margin-left:auto}
.nav-list{display:flex;gap:4px;align-items:center}
.nav-list a{
  display:inline-block;padding:10px 14px;border-radius:999px;
  color:var(--light);font-size:15px;font-weight:600;
  border:1px solid transparent;
}
.nav-list a:hover{color:var(--green);border-color:rgba(0,255,135,.35);background:rgba(0,255,135,.05)}
.nav-list a[aria-current="page"]{
  color:var(--night);background:var(--green);border-color:var(--green);
  font-weight:800;
}
.header-actions{display:flex;align-items:center;gap:22px}
.header-metrics{display:flex;gap:18px}
.metric{display:flex;flex-direction:column;align-items:flex-end;line-height:1.1}
.metric-label{font-size:10px;letter-spacing:.18em;text-transform:uppercase;color:#8ba2bd}
.metric-value{
  font-family:var(--font-mono);font-size:18px;font-weight:700;color:var(--green);
  background:rgba(0,255,135,.07);padding:2px 8px;border-radius:8px;
}
.nav-toggle{
  display:none;
  flex-direction:column;align-items:center;justify-content:center;
  width:48px;height:48px;border-radius:50%;
  background:var(--deep);border:1px solid var(--violet);
  color:var(--light);
}
.nav-toggle-line{width:18px;height:2px;background:var(--green);margin:2px 0;border-radius:2px}
.nav-toggle-text{font-size:9px;letter-spacing:.1em;color:var(--light);margin-top:2px}
.nav-slide-panel{
  display:none;
  background:var(--deep);
  border-top:1px solid rgba(90,24,154,.5);
}
.nav-slide-panel[data-open="true"]{display:block}
.nav-panel-list{padding:12px 24px 24px}
.nav-panel-list a{
  display:block;padding:12px 10px;border-bottom:1px solid rgba(224,225,221,.08);
  color:var(--light);font-size:16px;border-radius:10px;
}
.nav-panel-list a:hover{background:rgba(90,24,154,.25);color:var(--green)}

/* main */
.site-main{flex:1;width:100%;overflow:clip;position:relative}
.main-content{max-width:var(--container);margin:0 auto;padding:0 24px}
.container-narrow{max-width:860px;margin:0 auto;padding:0 24px}

/* progress */
.scroll-progress{
  position:fixed;top:0;left:0;height:4px;background:linear-gradient(90deg,var(--violet),var(--green),var(--cyan));
  width:0;z-index:200;transition:width .1s linear;
}

/* buttons */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:10px;
  padding:12px 26px;border-radius:999px;
  background:var(--green);color:#08131f;font-weight:800;font-size:16px;
  border:1px solid var(--green);transition:transform .25s var(--ease),box-shadow .25s var(--ease),filter .25s var(--ease);
}
.btn:hover{color:#08131f;transform:translateY(-2px);box-shadow:0 10px 24px rgba(0,255,135,.2);filter:brightness(1.08)}
.btn-secondary{
  background:transparent;color:var(--green);border-color:rgba(0,255,135,.5);
}
.btn-secondary:hover{background:rgba(0,255,135,.08);color:var(--green)}

/* breadcrumb */
.page-breadcrumb{
  display:flex;flex-wrap:wrap;gap:8px 12px;padding:18px 0 6px;font-size:14px;color:#8ba2bd;
}
.page-breadcrumb a{color:var(--cyan)}
.page-breadcrumb a:hover{color:var(--green)}
.page-breadcrumb span[aria-current="page"]{color:var(--green);font-weight:700}

/* data components */
.data-badge{
  display:inline-flex;align-items:center;gap:6px;
  padding:4px 12px;border-radius:999px;
  background:rgba(90,24,154,.2);border:1px solid var(--violet);
  font-family:var(--font-mono);font-size:13px;color:var(--green-soft);
}
.data-row{
  display:flex;flex-wrap:wrap;gap:8px 24px;
  font-family:var(--font-mono);font-size:15px;
  padding:14px 18px;background:rgba(27,38,59,.6);border-radius:var(--radius-sm);
  border-left:3px solid var(--cyan);
}
.tag-pill{
  display:inline-block;padding:4px 14px;border-radius:999px;
  font-size:12px;font-weight:700;letter-spacing:.04em;background:rgba(0,180,216,.15);
  color:var(--cyan);border:1px solid rgba(0,180,216,.4);
}
.tag-pill.tag-hot{background:rgba(255,109,0,.18);border-color:rgba(255,109,0,.5);color:#ffb37a}

/* cards */
.card-panel{
  background:rgba(27,38,59,.75);border:1px solid rgba(0,180,216,.18);
  border-radius:var(--radius-lg);padding:28px;box-shadow:var(--shadow);
  transition:transform .3s var(--ease),border-color .3s var(--ease);
}
.card-panel:hover{transform:translateY(-4px);border-color:rgba(0,255,135,.3)}

/* image frame */
.image-frame{
  position:relative;border-radius:var(--radius-md);overflow:hidden;
  background:linear-gradient(135deg,rgba(90,24,154,.3),rgba(13,27,42,.9));
  border:1px solid rgba(0,180,216,.25);
  aspect-ratio:4/3;
}
.image-frame--wide{aspect-ratio:16/9}
.image-frame--tall{aspect-ratio:3/4}
.image-frame img{width:100%;height:100%;object-fit:cover}

/* tabs */
.tabs{
  display:flex;flex-wrap:wrap;gap:10px;margin-bottom:22px;
  border-bottom:1px solid rgba(224,225,221,.12);padding-bottom:16px;
}
.tabs [role="tab"]{
  padding:10px 20px;border-radius:999px;font-weight:700;font-size:15px;
  color:var(--light);background:var(--deep);border:1px solid rgba(224,225,221,.16);
  transition:background .25s var(--ease),color .25s var(--ease),border-color .25s var(--ease);
}
.tabs [role="tab"][aria-selected="true"]{
  background:var(--violet);border-color:var(--violet);color:#fff;
}
.tabs [role="tab"]:hover:not([aria-selected="true"]){border-color:var(--green);color:var(--green)}
.tabpanel{display:none}
.tabpanel[data-active="true"]{display:block;animation:fadeIn .35s var(--ease)}
@keyframes fadeIn{from{opacity:0;transform:translateY(8px)}to{opacity:1;transform:none}}

/* accordion */
.accordion-item{
  background:rgba(27,38,59,.7);border-radius:var(--radius-md);
  margin-bottom:14px;overflow:hidden;border:1px solid rgba(0,180,216,.14);
}
.accordion-item + .accordion-item{margin-top:0}
.accordion-btn{
  width:100%;display:flex;justify-content:space-between;align-items:center;gap:16px;
  padding:18px 22px;color:var(--light);font-size:16px;font-weight:700;text-align:left;
}
.accordion-btn::after{
  content:"";flex:0 0 10px;width:10px;height:10px;border-right:2px solid var(--green);border-bottom:2px solid var(--green);
  transform:rotate(45deg);transition:transform .3s var(--ease);
}
.accordion-item[data-open="true"] .accordion-btn::after{transform:rotate(225deg)}
.accordion-panel{max-height:0;overflow:hidden;transition:max-height .35s var(--ease)}
.accordion-inner{padding:0 22px 22px;color:#b8c4cf}
.accordion-item[data-open="true"] .accordion-panel{max-height:500px}

/* reveal */
.reveal{opacity:0;transform:translateY(24px);transition:opacity .7s var(--ease),transform .7s var(--ease)}
.reveal.is-inview{opacity:1;transform:none}

/* footer */
.site-footer{
  position:relative;background:var(--deep);
  border-top:4px solid var(--violet);
  margin-top:110px;
}
.site-footer::before{
  content:"";position:absolute;top:-42px;left:0;width:100%;height:42px;
  background:linear-gradient(105deg,transparent 30%,rgba(90,24,154,.45) 55%,transparent 75%);
  clip-path:polygon(0 0,100% 100%,0 100%);
}
.footer-accent{
  position:absolute;top:0;right:0;width:38%;height:6px;
  background:linear-gradient(90deg,transparent,var(--green));
  border-radius:0 0 0 999px;
}
.footer-main{
  max-width:var(--container);margin:0 auto;padding:56px 24px 40px;
  display:grid;grid-template-columns:2fr 1fr 1fr 1.2fr;gap:36px;
}
.footer-logo{font-family:var(--font-heading);font-weight:900;font-size:32px;color:#fff}
.footer-slogan{
  font-family:var(--font-mono);font-size:13px;color:var(--green);letter-spacing:.08em;
  margin:8px 0 18px;padding:6px 14px;border-left:4px solid var(--green);
  background:rgba(0,255,135,.06);border-radius:0 999px 999px 0;width:fit-content;
}
.footer-trust{
  font-size:14px;line-height:1.8;color:#a8c0d4;
  padding:18px 20px;background:rgba(13,27,42,.6);
  border-left:3px solid var(--green);border-radius:0 var(--radius-sm) var(--radius-sm) 0;
}
.footer-heading{
  font-size:13px;font-weight:800;letter-spacing:.16em;text-transform:uppercase;
  color:var(--green);margin-bottom:18px;display:flex;align-items:center;gap:10px;
}
.footer-heading::before{content:"";width:22px;height:3px;background:var(--violet);border-radius:2px}
.footer-links{display:flex;flex-direction:column;gap:10px}
.footer-links a{color:#c6d2de;font-size:14px}
.footer-links a:hover{color:var(--green);transform:translateX(4px)}
.footer-links li{font-size:14px;color:#a8c0d4;line-height:1.6;transition:transform .2s var(--ease)}
.footer-links li:hover{transform:translateX(2px)}
.footer-meta{
  max-width:var(--container);margin:0 auto;padding:22px 24px;
  display:flex;flex-wrap:wrap;justify-content:space-between;gap:12px;
  border-top:1px solid rgba(224,225,221,.12);
  font-family:var(--font-mono);font-size:13px;color:#8ba2bd;
}
.footer-legal{
  background:rgba(13,27,42,.8);padding:18px 24px;text-align:center;
  font-size:13px;color:#6f8ea8;border-top:1px solid rgba(0,255,135,.12);
}

/* to top */
.to-top-btn{
  position:fixed;right:22px;bottom:22px;z-index:150;
  width:52px;height:52px;border-radius:50%;
  background:var(--violet);color:#fff;font-size:20px;line-height:1;
  border:1px solid rgba(0,255,135,.5);
  box-shadow:0 8px 30px rgba(90,24,154,.45);
  opacity:0;visibility:hidden;transform:translateY(20px);
  transition:all .3s var(--ease);
  display:flex;align-items:center;justify-content:center;
}
.to-top-btn.is-visible{opacity:1;visibility:visible;transform:none}
.to-top-btn:hover{background:var(--green);color:#08131f;border-color:var(--green)}

/* responsive */
@media (max-width:1080px){
  .header-metrics{display:none}
  .site-nav{display:none}
  .nav-toggle{display:flex}
  .nav-slide-panel{display:none}
  .nav-slide-panel[data-open="true"]{display:block}
  .footer-main{grid-template-columns:1fr 1fr 1fr}
}
@media (max-width:760px){
  :root{--header-h:76px}
  .header-inner{padding:0 18px}
  .brand-name{font-size:22px}
  .brand-slogan{font-size:9px}
  .footer-main{grid-template-columns:1fr 1fr;gap:28px;padding:40px 18px 28px}
  .footer-main .footer-brand{grid-column:1/-1}
  .footer-meta{flex-direction:column;padding:18px}
  .to-top-btn{right:16px;bottom:16px;width:48px;height:48px}
  .card-panel{padding:20px;border-radius:24px}
  .page-breadcrumb{padding-top:14px}
}
@media (max-width:480px){
  .footer-main{grid-template-columns:1fr}
  .footer-brand{grid-column:auto}
  .nav-toggle{width:44px;height:44px}
  .container-narrow,.main-content{padding:0 16px}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none!important;scroll-behavior:auto!important;transition:none!important}
  .reveal{opacity:1;transform:none}
  .to-top-btn{transition:none}
}