*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-padding-top:132px}
body,h1,h2,h3,h4,h5,p,ul,ol,li,figure,blockquote,dl,dd{margin:0;padding:0}
ul,ol{list-style:none}
img,svg,video{display:block;max-width:100%}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
a{color:inherit;text-decoration:none}
table{border-collapse:collapse;width:100%}

:root{
  --void:#0A1020;
  --night:#111A33;
  --panel:#1B2542;
  --lime:#C6FF3D;
  --orange:#FF7A2F;
  --violet:#6E6A8F;
  --ice:#E8EEF9;
  --mist:#9AA6BF;
  --cyan:#4FD1FF;
  --rail:104px;
  --edge:rgba(110,106,143,.34);
  --edge-soft:rgba(110,106,143,.16);
  --grid-line:rgba(110,106,143,.11);
  --r-lg:28px;
  --r-md:18px;
  --r-sm:12px;
  --pill:999px;
  --pad:clamp(20px,4vw,56px);
  --font-sans:"PingFang SC","Hiragino Sans GB","Source Han Sans SC","Noto Sans SC","Microsoft YaHei",-apple-system,system-ui,sans-serif;
  --font-mono:"JetBrains Mono","IBM Plex Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
  --t13:13px;--t15:15px;--t18:18px;--t24:24px;--t34:34px;--t44:44px;--t62:62px;
}

body{
  padding-left:var(--rail);
  min-height:100vh;
  background-color:var(--void);
  background-image:
    linear-gradient(var(--grid-line) 1px,transparent 1px),
    linear-gradient(90deg,var(--grid-line) 1px,transparent 1px),
    radial-gradient(900px 520px at 78% -10%,rgba(79,209,255,.10),transparent 65%),
    radial-gradient(720px 480px at 4% 2%,rgba(198,255,61,.07),transparent 62%);
  background-size:72px 72px,72px 72px,auto,auto;
  background-attachment:fixed;
  color:var(--ice);
  font-family:var(--font-sans);
  font-size:17px;
  line-height:1.75;
  letter-spacing:.006em;
}

h1,h2,h3,h4{font-weight:800;font-stretch:85%;letter-spacing:-.02em;line-height:1.1;color:var(--ice)}
h1{font-size:clamp(38px,5.2vw,var(--t62))}
h2{font-size:clamp(26px,3.2vw,var(--t44))}
h3{font-size:clamp(20px,2.2vw,var(--t24))}
h4{font-size:var(--t18)}
p{max-width:36em}
strong{color:var(--lime);font-weight:700}
code,kbd,samp{font-family:var(--font-mono);font-size:.92em}

:focus-visible{outline:2px solid var(--lime);outline-offset:3px;border-radius:8px}
::selection{background:var(--lime);color:#0A1020}

#main-content{display:block;outline:none}

.skip-link{
  position:absolute;left:14px;top:-72px;z-index:200;
  display:inline-flex;align-items:center;min-height:44px;padding:10px 20px;
  border-radius:var(--pill);background:var(--lime);color:#0A1020;
  font-size:14px;font-weight:700;
  transition:top .2s ease;
}
.skip-link:focus{top:14px}

/* ============ HEADER ============ */
.bs-header{
  position:sticky;top:0;z-index:50;
  background:rgba(10,16,32,.88);
  border-bottom:1px solid var(--edge-soft);
  backdrop-filter:blur(10px);
  -webkit-backdrop-filter:blur(10px);
}
.nav-shell{position:relative}

.rail{
  position:fixed;left:0;top:0;bottom:0;z-index:60;
  width:var(--rail);
  display:flex;flex-direction:column;align-items:center;
  gap:18px;padding:20px 0 24px;
  background:var(--panel);
  border-right:1px solid var(--edge-soft);
  background-image:repeating-linear-gradient(180deg,transparent 0 22px,rgba(110,106,143,.14) 22px 23px);
}
.rail__mark{
  display:inline-flex;align-items:center;justify-content:center;
  width:46px;height:46px;border-radius:14px;
  border:1px solid rgba(198,255,61,.5);color:var(--lime);
  font-family:var(--font-mono);font-size:16px;letter-spacing:.04em;
}
.rail__mid{display:flex;flex:1;flex-direction:column;align-items:center;justify-content:center;gap:20px}
.rail__word{
  writing-mode:vertical-rl;
  font-size:12px;letter-spacing:.42em;color:var(--violet);
}
.rail__track{
  display:block;width:2px;height:104px;border-radius:2px;
  background:rgba(110,106,143,.28);overflow:hidden;
}
.rail__fill{
  display:block;width:100%;height:100%;
  background:linear-gradient(180deg,var(--lime),var(--cyan));
  transform:scaleY(0);transform-origin:50% 0;
  transition:transform .18s linear;
}
.rail__ver{
  font-family:var(--font-mono);font-size:12px;color:var(--mist);
  border:1px solid var(--edge);border-radius:var(--pill);
  padding:4px 10px;
}

.nav-top{
  display:flex;align-items:center;gap:clamp(14px,3vw,36px);
  padding:14px var(--pad) 10px;
}
.brand{display:inline-flex;align-items:center;gap:12px;min-height:44px}
.brand__mark{
  width:14px;height:14px;border-radius:4px;background:var(--lime);
  box-shadow:0 0 0 4px rgba(198,255,61,.14);
}
.brand__text{display:flex;flex-direction:column;line-height:1.3}
.brand__name{font-size:20px;font-weight:800;font-stretch:85%;letter-spacing:-.01em}
.brand__line{font-size:var(--t13);color:var(--mist)}

.switch{
  display:flex;align-items:center;gap:4px;margin-left:auto;
  padding:4px;background:var(--night);
  border:1px solid var(--edge-soft);border-radius:var(--pill);
}
.switch__hint{font-size:12px;color:var(--violet);padding:0 10px;white-space:nowrap}
.switch__btn{
  display:inline-flex;align-items:center;min-height:44px;padding:6px 18px;
  border-radius:var(--pill);font-size:14px;color:var(--mist);
  transition:background-color .2s ease,color .2s ease;
}
.switch__btn:hover{color:var(--ice)}
.switch__btn.is-active{background:var(--lime);color:#0A1020;font-weight:700}

.nav-toggle{
  display:none;align-items:center;gap:10px;min-height:44px;
  padding:10px 16px;border:1px solid var(--edge);
  border-radius:var(--pill);font-size:14px;color:var(--ice);
}
.nav-toggle__bars{display:flex;flex-direction:column;gap:4px;width:16px}
.nav-toggle__bars i{display:block;height:2px;border-radius:2px;background:var(--lime);transition:transform .24s ease,opacity .24s ease}

.nav{
  display:flex;align-items:center;gap:clamp(8px,2vw,28px);
  padding:0 var(--pad) 12px;
}
.nav__list{display:flex;align-items:center;flex-wrap:wrap;gap:clamp(2px,1vw,10px)}
.nav__link{
  display:inline-flex;align-items:center;min-height:44px;padding:0 14px;
  border-radius:var(--pill);border-bottom:2px solid transparent;
  font-size:var(--t15);color:var(--mist);
  transition:color .2s ease,background-color .2s ease,border-color .2s ease;
}
.nav__link:hover{color:var(--ice);background:rgba(232,238,249,.05)}
.nav__link[aria-current="page"]{
  color:var(--lime);background:rgba(198,255,61,.1);
  border-bottom-color:var(--lime);font-weight:700;
}
.nav__note{
  margin-left:auto;max-width:26em;
  padding-left:14px;border-left:1px dashed var(--edge);
  font-size:var(--t13);line-height:1.5;color:var(--mist);
}
[data-version="legacy"] .nav__item[data-legacy="dim"] .nav__link{color:var(--violet);opacity:.72}

.progress{
  position:absolute;left:0;right:0;bottom:0;height:2px;
  background:rgba(110,106,143,.2);overflow:hidden;
}
.progress__bar{
  display:block;width:100%;height:100%;
  background:linear-gradient(90deg,var(--lime),var(--cyan));
  transform:scaleX(0);transform-origin:0 50%;
  transition:transform .12s linear;
}
.bs-header[data-open] .nav-toggle{border-color:var(--lime);color:var(--lime)}
.bs-header[data-open] .nav-toggle__bars i:nth-child(1){transform:translateY(6px) rotate(45deg)}
.bs-header[data-open] .nav-toggle__bars i:nth-child(2){opacity:0}
.bs-header[data-open] .nav-toggle__bars i:nth-child(3){transform:translateY(-6px) rotate(-45deg)}

/* ============ FOOTER ============ */
.bs-footer{
  margin-top:clamp(64px,8vw,120px);
  background:var(--panel);
  border-top:1px solid var(--edge-soft);
}
.footer__inner{
  max-width:1240px;margin:0 auto;
  padding:clamp(40px,6vw,72px) var(--pad) 32px;
  display:grid;grid-template-columns:1.5fr 1fr 1fr 1.3fr;
  gap:clamp(24px,4vw,48px);
}
.footer__brand{font-size:var(--t24);font-weight:800;font-stretch:85%;letter-spacing:-.02em}
.footer__tag{margin:10px 0 20px;font-size:14px;color:var(--mist)}
.footer__title{
  margin-bottom:14px;font-size:var(--t13);font-weight:600;
  letter-spacing:.16em;color:var(--violet);
}
.footer__list{display:grid;gap:10px;font-size:var(--t15)}
.footer__list a{color:var(--mist);transition:color .2s ease}
.footer__list a:hover{color:var(--lime)}
.footer__list--plain{font-size:14px;line-height:1.7;color:var(--mist)}
.footer__base{
  max-width:1240px;margin:0 auto;
  padding:18px var(--pad) 28px;
  border-top:1px dashed var(--edge-soft);
  display:flex;flex-wrap:wrap;gap:12px 28px;
  font-size:var(--t13);color:var(--violet);
}
.footer__legal{font-family:var(--font-mono);color:var(--mist)}
.footer__note{margin-left:auto}

/* ============ 通用组件 ============ */
.wrap{width:100%;max-width:1240px;margin:0 auto;padding:0 var(--pad)}
.section{padding:clamp(56px,7vw,96px) 0}
.section__head{
  display:flex;align-items:flex-end;justify-content:space-between;
  gap:24px;margin-bottom:clamp(24px,3vw,40px);
}
.section__title{max-width:14em}
.section__sub{margin-top:12px;font-size:var(--t15);color:var(--mist)}
.eyebrow{
  display:inline-flex;align-items:center;gap:10px;
  font-family:var(--font-mono);font-size:var(--t13);
  letter-spacing:.16em;color:var(--lime);text-transform:uppercase;
}
.eyebrow::before{content:"";width:22px;height:1px;background:var(--lime)}
.lede{font-size:var(--t18);color:var(--mist);max-width:34em}
.page-head{padding:clamp(36px,6vw,72px) 0 0}

.breadcrumb{font-size:var(--t13);color:var(--mist)}
.breadcrumb ol{display:flex;flex-wrap:wrap;align-items:center;gap:8px}
.breadcrumb li{display:flex;align-items:center;gap:8px}
.breadcrumb li::after{content:"/";color:var(--violet)}
.breadcrumb li:last-child::after{content:""}
.breadcrumb a:hover{color:var(--lime)}
.breadcrumb [aria-current="page"]{color:var(--ice)}

.band{
  padding:40px 0;
  border-top:1px dashed var(--edge-soft);
  border-bottom:1px dashed var(--edge-soft);
  background:linear-gradient(90deg,rgba(27,37,66,.9),rgba(10,16,32,0));
}

.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:44px;padding:12px 24px;border-radius:var(--pill);
  border:1px solid transparent;font-size:var(--t15);font-weight:600;
  transition:background-color .2s ease,color .2s ease,border-color .2s ease;
}
.btn--primary{background:var(--lime);color:#0A1020}
.btn--primary:hover{background:#d8ff72}
.btn--ghost{border-color:var(--edge);color:var(--ice)}
.btn--ghost:hover{border-color:var(--lime);color:var(--lime)}
.btn--quiet{border-color:var(--edge-soft);color:var(--mist)}
.btn--quiet:hover{color:var(--ice);border-color:var(--edge)}

.card{
  padding:clamp(20px,2.4vw,28px);
  background:var(--night);
  border:1px solid var(--edge-soft);
  border-radius:var(--r-md);
}
.card--slab{border-radius:var(--r-lg);background:linear-gradient(165deg,#16203a,#101830 70%)}
.card__head{
  display:flex;align-items:baseline;justify-content:space-between;gap:16px;
  padding-bottom:12px;margin-bottom:16px;border-bottom:1px dashed var(--edge-soft);
}
.card__title{font-size:var(--t18);font-weight:700;font-stretch:85%}
.card__meta{font-family:var(--font-mono);font-size:var(--t13);color:var(--mist)}
.card__body{font-size:var(--t15);color:var(--mist)}

.board{
  padding:var(--t24);
  background:var(--night);
  border:1px solid var(--edge-soft);
  border-radius:var(--r-md);
}
.board__head{
  display:flex;align-items:baseline;justify-content:space-between;gap:16px;
  padding-bottom:12px;margin-bottom:16px;border-bottom:1px dashed var(--edge);
}
.board__index{font-family:var(--font-mono);font-size:var(--t13);color:var(--lime)}
.board__body{font-size:16px;color:var(--mist)}
.board__foot{margin-top:16px;font-size:var(--t13);color:var(--violet)}

.pill{
  display:inline-flex;align-items:center;gap:6px;
  padding:6px 12px;border-radius:var(--pill);
  border:1px solid var(--edge);font-size:var(--t13);color:var(--mist);
}
.pill--lime{border-color:rgba(198,255,61,.5);color:var(--lime)}
.pill--orange{border-color:rgba(255,122,47,.5);color:var(--orange)}

.kpi{display:flex;flex-direction:column;gap:4px}
.kpi__num{
  font-family:var(--font-mono);font-size:var(--t34);
  letter-spacing:-.02em;color:var(--ice);line-height:1.1;
}
.kpi__label{font-size:var(--t13);color:var(--mist)}

.meter{height:6px;border-radius:var(--pill);background:rgba(110,106,143,.22);overflow:hidden}
.meter__fill{
  display:block;height:100%;width:var(--v,50%);
  border-radius:var(--pill);
  background:linear-gradient(90deg,var(--cyan),var(--lime));
  transition:width .6s ease;
}

.media-frame{
  position:relative;overflow:hidden;
  border-radius:var(--r-lg);
  border:1px solid var(--edge-soft);
  aspect-ratio:16/9;
  background:
    radial-gradient(120% 90% at 22% 0%,rgba(79,209,255,.16),transparent 62%),
    radial-gradient(80% 70% at 90% 100%,rgba(255,122,47,.12),transparent 60%),
    linear-gradient(160deg,#16203a,#0d1424 72%);
}
.media-frame img{width:100%;height:100%;object-fit:cover}
.media-frame--wide{aspect-ratio:21/9}
.media-frame--tall{aspect-ratio:4/5}
.media-frame__cap{
  position:absolute;left:18px;bottom:14px;right:18px;
  font-size:var(--t13);color:var(--mist);
}
.media-frame__ticks{
  position:absolute;inset:14px;pointer-events:none;opacity:.75;
  background:
    linear-gradient(var(--lime),var(--lime)) left top/14px 1px no-repeat,
    linear-gradient(var(--lime),var(--lime)) left top/1px 14px no-repeat,
    linear-gradient(var(--lime),var(--lime)) right top/14px 1px no-repeat,
    linear-gradient(var(--lime),var(--lime)) right top/1px 14px no-repeat,
    linear-gradient(var(--lime),var(--lime)) left bottom/14px 1px no-repeat,
    linear-gradient(var(--lime),var(--lime)) left bottom/1px 14px no-repeat,
    linear-gradient(var(--lime),var(--lime)) right bottom/14px 1px no-repeat,
    linear-gradient(var(--lime),var(--lime)) right bottom/1px 14px no-repeat;
}

.grid{display:grid;gap:24px}
.grid--12{grid-template-columns:repeat(12,minmax(0,1fr))}
.col-4{grid-column:span 4}
.col-6{grid-column:span 6}
.col-8{grid-column:span 8}
.col-12{grid-column:span 12}
.stack{display:flex;flex-direction:column;gap:24px}
.cluster{display:flex;flex-wrap:wrap;align-items:center;gap:12px}

[data-motion="on"] [data-reveal]{
  opacity:0;transform:translateY(12px);
  transition:opacity .32s ease,transform .32s ease;
  transition-delay:var(--rd,0ms);
}
[data-motion="on"] [data-reveal].is-in{opacity:1;transform:none}

/* ============ 响应式 ============ */
@media (max-width:1100px){
  :root{--rail:84px}
  .footer__inner{grid-template-columns:1fr 1fr}
  .footer__lead{grid-column:span 2}
}
@media (max-width:900px){
  body{padding-left:0;background-attachment:scroll}
  .bs-header{position:sticky}
  .rail{
    position:static;width:auto;height:auto;
    flex-direction:row;align-items:center;justify-content:flex-start;
    gap:14px;padding:12px var(--pad);
    border-right:0;border-bottom:1px solid var(--edge-soft);
    z-index:auto;
  }
  .rail__mid{display:none}
  .rail__mark{width:38px;height:38px;border-radius:12px;font-size:14px}
  .rail__ver{margin-left:auto}
  .nav-top{padding:12px var(--pad) 8px;flex-wrap:wrap}
  .switch{margin-left:auto;order:2}
  .switch__hint{display:none}
  .nav-toggle{display:inline-flex;order:3;margin-left:8px}
  .nav{display:none;padding:8px var(--pad) 16px;flex-direction:column;align-items:flex-start}
  .bs-header[data-open] .nav{display:flex}
  .bs-header[data-open] .nav__list{
    flex-wrap:nowrap;overflow-x:auto;width:100%;
    padding-bottom:6px;
    -webkit-overflow-scrolling:touch;
    scrollbar-width:thin;
  }
  .nav__link{white-space:nowrap;background:rgba(232,238,249,.04)}
  .nav__note{margin-left:0;max-width:none;border-left:0;padding-left:0}
  .col-4,.col-6,.col-8{grid-column:span 12}
}
@media (max-width:640px){
  body{font-size:16px;line-height:1.72}
  .brand__line{display:none}
  .brand__name{font-size:18px}
  .switch__btn{padding:6px 14px;font-size:13px}
  .nav-toggle__label{display:none}
  .footer__inner{grid-template-columns:1fr;gap:28px}
  .footer__lead{grid-column:span 1}
  .footer__note{margin-left:0}
  .media-frame--wide{aspect-ratio:16/9}
}

@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-motion="on"] [data-reveal]{opacity:1;transform:none}
}