:root{
  --bo-deep:#061C2E;
  --bo-ink:#0B1424;
  --bo-cyan:#1FE0C8;
  --bo-cyan-soft:rgba(31,224,200,.14);
  --bo-hot:#FF4F2E;
  --bo-paper:#F4EBDD;
  --bo-turf:#1E7F63;
  --bo-red:#C81E3A;
  --bo-yellow:#F0C232;
  --bo-fog:#8DA3B2;
  --bo-white:#F7FBFF;
  --bo-line:rgba(141,163,178,.24);
  --bo-line-soft:rgba(141,163,178,.14);
  --bo-radius-xl:36px;
  --bo-radius-lg:24px;
  --bo-radius-md:16px;
  --bo-radius-pill:999px;
  --bo-max:1240px;
  --bo-gutter:clamp(18px,4vw,56px);
  --bo-header-h:74px;
  --bo-shadow-card:0 26px 60px -38px rgba(2,10,20,.95);
  --bo-font-display:"Source Han Sans SC","Noto Sans SC",system-ui,"PingFang SC","Microsoft YaHei",sans-serif;
  --bo-font-body:"Noto Sans SC",system-ui,"PingFang SC","Microsoft YaHei",sans-serif;
  --bo-font-mono:"IBM Plex Mono","Roboto Mono",ui-monospace,SFMono-Regular,Menlo,monospace;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;scroll-padding-top:128px}
body{
  margin:0;
  background:var(--bo-deep);
  color:var(--bo-white);
  font-family:var(--bo-font-body);
  font-size:16px;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
  overflow-x:hidden;
}
h1,h2,h3,h4,p,ul,ol,figure,blockquote{margin:0}
ul,ol{padding:0}
li{list-style:none}
img,svg,video{max-width:100%;height:auto;display:block}
a{color:inherit}
button{font:inherit;color:inherit}
::selection{background:var(--bo-hot);color:#fff}
:focus-visible{outline:2px solid var(--bo-cyan);outline-offset:3px;border-radius:6px}
.bo-skip{
  position:fixed;top:-90px;left:16px;z-index:200;
  display:inline-flex;align-items:center;
  padding:11px 20px;
  background:var(--bo-cyan);color:#04202b;
  font-weight:700;font-size:13.5px;letter-spacing:.06em;
  text-decoration:none;border-radius:0 0 14px 14px;
  transition:top .18s ease;
}
.bo-skip:focus{top:0}
.bo-container{width:100%;max-width:var(--bo-max);margin-inline:auto;padding-inline:var(--bo-gutter)}
.bo-section{position:relative;padding-block:clamp(48px,7vw,96px)}
.bo-grid{display:grid;gap:clamp(18px,2.4vw,32px)}
.bo-grid--12{grid-template-columns:repeat(12,minmax(0,1fr))}
.bo-kicker{
  display:inline-flex;align-items:center;gap:10px;
  font-family:var(--bo-font-mono);font-size:12px;letter-spacing:.22em;text-transform:uppercase;
  color:var(--bo-cyan);margin-bottom:14px;
}
.bo-kicker::before{content:"";width:26px;height:2px;background:currentColor;flex:none}
.bo-h1,.bo-h2,.bo-h3{font-family:var(--bo-font-display);font-weight:900;line-height:1.08;letter-spacing:-.04em;color:var(--bo-white);text-wrap:balance}
.bo-h1{font-size:clamp(2.35rem,6vw,4.5rem)}
.bo-h2{font-size:clamp(1.75rem,3.6vw,2.85rem)}
.bo-h3{font-size:clamp(1.15rem,2vw,1.45rem);letter-spacing:-.02em;line-height:1.3}
.bo-lead{font-size:clamp(1rem,1.25vw,1.125rem);line-height:1.85;color:#c3d4de;max-width:58ch}
.bo-num{font-family:var(--bo-font-mono);font-variant-numeric:tabular-nums;letter-spacing:.02em}
.bo-annot{
  writing-mode:vertical-rl;text-orientation:mixed;
  font-size:12px;letter-spacing:.3em;text-transform:uppercase;
  color:var(--bo-fog);
}
.bo-card{
  background:rgba(11,20,36,.74);
  border:1px solid var(--bo-line);
  border-radius:var(--bo-radius-lg);
  padding:clamp(20px,2.4vw,32px);
  box-shadow:var(--bo-shadow-card);
}
.bo-card--paper{background:var(--bo-paper);color:var(--bo-deep);border-color:rgba(6,28,46,.14);box-shadow:0 24px 50px -34px rgba(2,10,20,.7)}
.bo-pill{
  display:inline-flex;align-items:center;gap:8px;
  padding:7px 15px;border-radius:var(--bo-radius-pill);
  border:1px solid var(--bo-line);
  background:var(--bo-cyan-soft);
  font-size:12.5px;letter-spacing:.06em;color:#d6e5ee;line-height:1.4;
}
.bo-tag{
  display:inline-flex;align-items:center;gap:6px;
  padding:4px 10px;border-radius:7px;
  font-family:var(--bo-font-mono);font-size:12px;font-weight:600;line-height:1.5;letter-spacing:.04em;
}
.bo-tag--red{background:var(--bo-red);color:#fff}
.bo-tag--yellow{background:var(--bo-yellow);color:#241a00}
.bo-tag--cyan{background:var(--bo-cyan-soft);color:var(--bo-cyan);border:1px solid rgba(31,224,200,.34)}
.bo-btn{
  display:inline-flex;align-items:center;justify-content:center;gap:10px;
  padding:13px 24px;border-radius:var(--bo-radius-pill);
  border:1px solid transparent;background:none;
  font-family:var(--bo-font-body);font-weight:600;font-size:14.5px;letter-spacing:.02em;
  text-decoration:none;cursor:pointer;white-space:nowrap;
  transition:transform .2s ease,background-color .2s ease,color .2s ease,border-color .2s ease;
}
.bo-btn--hot{background:var(--bo-hot);color:#fff;box-shadow:0 16px 32px -20px rgba(255,79,46,.95)}
.bo-btn--hot:hover{background:#ff6a4d;transform:translateY(-2px)}
.bo-btn--cyan{background:var(--bo-cyan);color:#04202b}
.bo-btn--cyan:hover{background:#63eeda;transform:translateY(-2px)}
.bo-btn--ghost{border-color:rgba(247,251,255,.3);color:var(--bo-white);background:rgba(247,251,255,.04)}
.bo-btn--ghost:hover{border-color:var(--bo-cyan);color:var(--bo-cyan);background:rgba(31,224,200,.1)}
.bo-btn--paper{background:var(--bo-paper);color:var(--bo-deep)}
.bo-btn--paper:hover{background:#fff8ec;transform:translateY(-2px)}
.bo-breadcrumb{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px;
  padding-block:18px;font-size:12.5px;color:var(--bo-fog);
}
.bo-breadcrumb a{color:#bcd0dc;text-decoration:none;border-bottom:1px solid transparent;transition:color .2s,border-color .2s}
.bo-breadcrumb a:hover{color:var(--bo-cyan);border-bottom-color:currentColor}
.bo-breadcrumb__sep{opacity:.5}
.bo-breadcrumb [aria-current="page"]{color:var(--bo-cyan)}
.bo-prose{max-width:70ch;font-size:1.0625rem;line-height:1.85;color:#d3e2ea}
.bo-prose p{margin:0 0 1.1em}
.bo-prose h2,.bo-prose h3{font-family:var(--bo-font-display);font-weight:900;letter-spacing:-.03em;color:var(--bo-white);margin:1.8em 0 .6em;line-height:1.2}
.bo-prose h2{font-size:clamp(1.4rem,2.4vw,1.9rem)}
.bo-prose h3{font-size:clamp(1.15rem,1.8vw,1.35rem)}
.bo-prose ul,.bo-prose ol{margin:0 0 1.2em;padding-left:1.2em}
.bo-prose li{list-style:disc;margin-bottom:.5em}
.bo-prose a{color:var(--bo-cyan);text-decoration:underline;text-underline-offset:3px}
.bo-prose blockquote{margin:1.6em 0;padding-left:18px;border-left:3px solid var(--bo-hot);color:#e2eef5}
.bo-prose code{font-family:var(--bo-font-mono);font-size:.92em;background:rgba(31,224,200,.12);padding:2px 7px;border-radius:6px}
.bo-prose--paper{color:#22313f}
.bo-prose--paper h2,.bo-prose--paper h3{color:var(--bo-deep)}
.bo-prose--paper a{color:#0a6b58}
.bo-media{
  position:relative;display:block;overflow:hidden;isolation:isolate;
  border-radius:var(--bo-radius-lg);
  background:linear-gradient(150deg,#0d2b45 0%,var(--bo-deep) 58%,#123a2f 100%);
  aspect-ratio:16/10;
}
.bo-media::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background:linear-gradient(155deg,rgba(31,224,200,.16),transparent 46%);
}
.bo-media img,.bo-media__img{width:100%;height:100%;object-fit:cover;display:block}
.bo-media--wide{aspect-ratio:21/9}
.bo-media--tall{aspect-ratio:3/4}
.bo-media--square{aspect-ratio:1/1}
.bo-media__caption{
  position:absolute;left:0;right:0;bottom:0;z-index:1;
  padding:16px 20px;font-size:12.5px;color:#dbe9f1;
  background:linear-gradient(to top,rgba(6,28,46,.94),rgba(6,28,46,0));
}
[data-reveal]{opacity:0;transform:translateY(18px);transition:opacity .6s ease,transform .6s ease}
[data-reveal].is-revealed{opacity:1;transform:none}
[data-toc-link]{color:var(--bo-fog);text-decoration:none;font-size:13px;transition:color .2s}
[data-toc-link]:hover{color:var(--bo-white)}
[data-toc-link][aria-current="true"]{color:var(--bo-cyan);font-weight:600}

/* ===== Header ===== */
.bo-header{
  position:sticky;top:0;z-index:60;
  background:var(--bo-ink);
  color:var(--bo-white);
  border-bottom:1px solid rgba(31,224,200,.16);
}
.bo-header::after{
  content:"";display:block;height:2px;
  background:linear-gradient(90deg,var(--bo-cyan) 0%,rgba(31,224,200,0) 34%,rgba(255,79,46,0) 66%,var(--bo-hot) 100%);
  opacity:.9;
}
.bo-progress{
  position:fixed;top:0;left:0;right:0;height:3px;z-index:90;
  pointer-events:none;background:rgba(31,224,200,.12);
}
.bo-progress__bar{
  display:block;height:100%;width:100%;
  transform:scaleX(0);transform-origin:left center;
  background:linear-gradient(90deg,var(--bo-cyan),var(--bo-hot));
}
.bo-strip{background:rgba(6,28,46,.92);border-bottom:1px solid var(--bo-line-soft)}
.bo-strip__inner{
  display:flex;align-items:center;gap:12px;
  min-height:34px;
  font-family:var(--bo-font-mono);font-size:11.5px;letter-spacing:.16em;
  color:var(--bo-fog);
}
.bo-strip__dot{
  width:7px;height:7px;border-radius:50%;flex:none;
  background:var(--bo-cyan);
  box-shadow:0 0 0 4px rgba(31,224,200,.16);
  animation:bo-pulse 2.6s ease-in-out infinite;
}
.bo-strip__text{color:var(--bo-white)}
.bo-strip__divider{width:1px;height:12px;background:var(--bo-line);flex:none}
.bo-strip__meta{margin-left:auto;text-transform:uppercase}
@keyframes bo-pulse{
  0%,100%{opacity:1;transform:scale(1)}
  50%{opacity:.42;transform:scale(.8)}
}
.bo-header__inner{
  display:flex;align-items:center;justify-content:space-between;gap:24px;
  min-height:var(--bo-header-h);
}
.bo-brand{display:inline-flex;align-items:center;gap:14px;color:inherit;text-decoration:none;flex:none}
.bo-brand__mark{
  position:relative;width:46px;height:46px;flex:none;
  display:grid;place-items:center;
  border-radius:15px;
  background:linear-gradient(150deg,#0d2b45,var(--bo-deep));
  border:1px solid rgba(31,224,200,.36);
  overflow:hidden;
}
.bo-brand__mark::before{
  content:"";width:21px;height:21px;border-radius:50%;
  border:2px solid var(--bo-cyan);
}
.bo-brand__mark::after{
  content:"";position:absolute;top:6px;bottom:6px;left:50%;width:1px;
  background:rgba(255,79,46,.9);transform:translateX(-50%);
}
.bo-brand__mark span{
  position:absolute;left:9px;right:9px;bottom:8px;height:2px;
  background:linear-gradient(90deg,var(--bo-cyan),rgba(31,224,200,0));
}
.bo-brand__text{display:block}
.bo-brand__name{
  display:block;font-family:var(--bo-font-display);font-weight:900;
  font-size:20px;letter-spacing:-.02em;line-height:1.15;color:var(--bo-white);
}
.bo-brand__line{
  display:block;margin-top:4px;
  font-size:11.5px;letter-spacing:.14em;color:var(--bo-fog);line-height:1.4;
}
.bo-nav{display:flex;align-items:center;gap:clamp(14px,2.2vw,30px)}
.bo-nav__list{display:flex;align-items:center;gap:clamp(4px,1.2vw,16px);margin:0;padding:0}
.bo-nav__item{display:block}
.bo-nav__link{
  position:relative;display:inline-block;padding:9px 5px;
  font-size:14.5px;font-weight:500;letter-spacing:.02em;
  color:#cfe0ea;text-decoration:none;
  transition:color .2s ease;
}
.bo-nav__link::after{
  content:"";position:absolute;left:5px;right:5px;bottom:2px;height:2px;
  background:var(--bo-cyan);
  transform:scaleX(0);transform-origin:left center;
  transition:transform .25s ease;
}
.bo-nav__link:hover,.bo-nav__link:focus-visible{color:var(--bo-white)}
.bo-nav__link:hover::after,.bo-nav__link:focus-visible::after{transform:scaleX(1)}
.bo-nav__link[aria-current="page"]{color:var(--bo-white);font-weight:700}
.bo-nav__link[aria-current="page"]::after{transform:scaleX(1);background:var(--bo-hot)}
.bo-nav__link--hot{
  padding:9px 18px;border-radius:var(--bo-radius-pill);
  background:var(--bo-hot);color:#fff;font-weight:700;
  box-shadow:0 12px 26px -18px rgba(255,79,46,.95);
}
.bo-nav__link--hot::after{display:none}
.bo-nav__link--hot:hover,.bo-nav__link--hot:focus-visible{background:#ff6a4d;color:#fff}
.bo-nav__link--hot[aria-current="page"]{background:#fff;color:var(--bo-deep)}
.bo-nav__cta{flex:none;padding:11px 18px;font-size:13.5px}
.bo-nav__toggle{
  display:none;align-items:center;gap:10px;
  padding:10px 16px;border-radius:var(--bo-radius-pill);
  border:1px solid rgba(31,224,200,.36);
  background:rgba(31,224,200,.08);
  color:var(--bo-white);font-size:13px;letter-spacing:.08em;cursor:pointer;
  transition:background-color .2s ease,border-color .2s ease;
}
.bo-nav__toggle:hover{background:rgba(31,224,200,.16);border-color:var(--bo-cyan)}
.bo-nav__bars{display:grid;gap:5px;width:18px;flex:none}
.bo-nav__bars span{display:block;height:2px;border-radius:2px;background:var(--bo-cyan);transition:transform .25s ease,opacity .25s ease}
.bo-nav__toggle[aria-expanded="true"] .bo-nav__bars span:first-child{transform:translateY(3.5px) rotate(45deg)}
.bo-nav__toggle[aria-expanded="true"] .bo-nav__bars span:last-child{transform:translateY(-3.5px) rotate(-45deg)}
.bo-nav__toggle-label{display:inline-block;min-width:2.4em;text-align:left}

/* ===== Footer ===== */
.bo-footer{
  position:relative;overflow:hidden;
  background:var(--bo-ink);color:var(--bo-white);
  border-top:1px solid rgba(31,224,200,.18);
  padding-top:clamp(42px,6vw,76px);
}
.bo-footer__lights{
  position:absolute;top:0;left:0;right:0;height:130px;
  pointer-events:none;
  background:repeating-linear-gradient(90deg,rgba(31,224,200,.18) 0 2px,transparent 2px 48px);
  -webkit-mask-image:linear-gradient(to bottom,rgba(0,0,0,.95),rgba(0,0,0,0));
  mask-image:linear-gradient(to bottom,rgba(0,0,0,.95),rgba(0,0,0,0));
}
.bo-footer__inner{position:relative;z-index:1;padding-bottom:clamp(26px,4vw,44px)}
.bo-footer__lead{display:flex;flex-direction:column;align-items:flex-start;gap:18px;max-width:660px}
.bo-footer__kicker{
  font-family:var(--bo-font-mono);font-size:12px;letter-spacing:.28em;
  text-transform:uppercase;color:var(--bo-cyan);
}
.bo-footer__statement{
  font-family:var(--bo-font-display);font-weight:900;
  font-size:clamp(1.45rem,3vw,2.3rem);line-height:1.22;letter-spacing:-.03em;
  color:var(--bo-white);text-wrap:balance;
}
.bo-footer__grid{
  display:grid;grid-template-columns:minmax(0,1fr);gap:clamp(28px,4vw,44px);
  margin-top:clamp(32px,5vw,56px);
  padding-top:clamp(24px,3vw,36px);
  border-top:1px solid var(--bo-line);
}
.bo-footer__col{min-width:0}
.bo-footer__title{
  margin:0 0 16px;
  font-family:var(--bo-font-mono);font-size:11.5px;font-weight:500;
  letter-spacing:.24em;text-transform:uppercase;color:var(--bo-fog);
}
.bo-footer__links{display:grid;grid-template-columns:minmax(0,1fr);gap:10px;margin:0;padding:0}
.bo-footer__link{
  display:inline-flex;align-items:center;gap:9px;
  font-size:14.5px;color:#d3e2ea;text-decoration:none;
  transition:color .2s ease;
}
.bo-footer__link::before{
  content:"";display:block;width:10px;height:1px;flex:none;
  background:rgba(31,224,200,.6);transition:width .2s ease,background-color .2s ease;
}
.bo-footer__link:hover{color:var(--bo-cyan)}
.bo-footer__link:hover::before{width:20px;background:var(--bo-cyan)}
.bo-footer__contact{display:block}
.bo-contact-row{display:grid;gap:2px;margin-bottom:14px}
.bo-contact-row__label{
  font-family:var(--bo-font-mono);font-size:11px;letter-spacing:.18em;
  text-transform:uppercase;color:var(--bo-fog);
}
.bo-contact-row__value{font-size:14.5px;line-height:1.6;color:var(--bo-white);overflow-wrap:anywhere}
.bo-footer__note{
  margin-top:16px;max-width:42ch;
  font-size:12.5px;line-height:1.75;color:var(--bo-fog);
}
.bo-footer__baseline{
  display:flex;flex-wrap:wrap;align-items:center;gap:12px 22px;
  margin-top:clamp(28px,4vw,44px);padding-top:20px;
  border-top:1px solid var(--bo-line);
  font-size:12.5px;color:var(--bo-fog);
}
.bo-footer__copy{margin:0}
.bo-footer__icp{margin:0;font-family:var(--bo-font-mono);letter-spacing:.04em}
.bo-footer__legal{
  color:#bcd0dc;text-decoration:none;
  border-bottom:1px solid rgba(141,163,178,.35);
  transition:color .2s ease,border-color .2s ease;
}
.bo-footer__legal:hover{color:var(--bo-cyan);border-bottom-color:currentColor}
.bo-footer__skyline{
  position:relative;height:clamp(58px,8vw,112px);margin-top:10px;
  background:linear-gradient(to top,rgba(4,16,28,.9),rgba(4,16,28,0));
}
.bo-footer__skyline::before{
  content:"";position:absolute;inset:0;
  background:#04101c;
  clip-path:polygon(0 100%,0 78%,5% 78%,5% 66%,9% 66%,9% 78%,14% 78%,14% 52%,18% 52%,18% 78%,24% 78%,24% 62%,30% 62%,30% 78%,36% 78%,36% 46%,40% 40%,44% 46%,44% 78%,50% 78%,50% 64%,55% 64%,55% 78%,62% 78%,62% 56%,67% 56%,67% 78%,73% 78%,73% 68%,78% 68%,78% 78%,84% 78%,84% 60%,89% 60%,89% 78%,94% 78%,94% 72%,100% 72%,100% 100%);
}
.bo-footer__skyline::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(to right,rgba(31,224,200,.22),rgba(255,79,46,.16) 70%,rgba(31,224,200,.1));
  mix-blend-mode:screen;opacity:.5;
  -webkit-mask-image:linear-gradient(to top,rgba(0,0,0,.85),rgba(0,0,0,0));
  mask-image:linear-gradient(to top,rgba(0,0,0,.85),rgba(0,0,0,0));
}

/* ===== Responsive ===== */
@media (max-width:960px){
  .bo-nav__toggle{display:inline-flex}
  .bo-nav{
    position:absolute;top:100%;left:0;right:0;
    display:none;flex-direction:column;align-items:stretch;gap:0;
    padding:14px var(--bo-gutter) 26px;
    background:var(--bo-ink);
    border-top:1px solid rgba(31,224,200,.22);
    border-bottom:1px solid rgba(31,224,200,.22);
    box-shadow:0 44px 70px -40px #000;
    max-height:calc(100vh - 110px);overflow-y:auto;
  }
  .bo-nav[data-open]{display:flex}
  .bo-nav__list{flex-direction:column;align-items:stretch;gap:0;width:100%}
  .bo-nav__item{order:2;width:100%}
  .bo-nav__item--hot{order:1;margin-bottom:10px}
  .bo-nav__link{
    display:block;width:100%;padding:14px 4px;
    font-size:16px;border-bottom:1px solid var(--bo-line-soft);
  }
  .bo-nav__link::after{display:none}
  .bo-nav__link--hot{
    text-align:center;border-bottom:0;padding:13px 18px;font-size:15.5px;
  }
  .bo-nav__cta{margin-top:16px;width:100%;padding:13px 18px;font-size:14.5px;border-color:rgba(31,224,200,.45);color:var(--bo-cyan)}
  .bo-brand__line{display:none}
  .bo-strip__meta{font-size:11px}
}
@media (max-width:520px){
  .bo-brand__name{font-size:18px}
  .bo-brand__mark{width:40px;height:40px;border-radius:13px}
  .bo-brand__mark::before{width:18px;height:18px}
  .bo-strip__divider{display:none}
  .bo-footer__baseline{gap:10px 16px}
}
@media (min-width:780px){
  .bo-footer__grid{grid-template-columns:minmax(0,1fr) minmax(0,1.3fr);gap:clamp(32px,5vw,72px)}
  .bo-footer__col--contact{border-left:1px solid var(--bo-line);padding-left:clamp(24px,3vw,44px)}
  .bo-footer__links{grid-template-columns:repeat(2,minmax(0,1fr));gap:10px 24px}
}
@media (min-width:961px){
  .bo-footer__lead{max-width:760px}
}
@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 !important;transform:none !important}
  .bo-progress__bar{transition:none !important}
}