/* ============================================================
   速博网 · 共享站点样式  /assets/site.css
   深空墨蓝底 + 速度蓝到电子青渐变 + 脉冲橙交互点
   ============================================================ */

/* ---------- 1. Reset ---------- */
*,*::before,*::after{box-sizing:border-box}
html{
  -webkit-text-size-adjust:100%;
  background:#05070F;
  scroll-behavior:smooth;
}
body,h1,h2,h3,h4,h5,p,ul,ol,li,figure,figcaption,blockquote,dl,dt,dd{margin:0}
ul,ol{padding:0;list-style:none}
img,svg,video{display:block;max-width:100%}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;background:none;border:0;padding:0;cursor:pointer}
:focus-visible{outline:2px solid #16E0D2;outline-offset:3px;border-radius:6px}

/* ---------- 2. Tokens ---------- */
:root{
  --sb-ink:#05070F;
  --sb-ink-2:#0B1226;
  --sb-blue:#1D6BFF;
  --sb-cyan:#16E0D2;
  --sb-ice:#0FA8E8;
  --sb-orange:#FF6A1A;
  --sb-white:#F5F8FF;
  --sb-steel:#8A97B4;
  --sb-glass:#E7EDF9;
  --sb-ok:#37E39B;

  --sb-line:rgba(231,237,249,.14);
  --sb-line-strong:rgba(231,237,249,.3);
  --sb-glass-bg:rgba(231,237,249,.08);
  --sb-glass-deep:rgba(11,18,38,.72);

  --sb-grad:linear-gradient(96deg,#1D6BFF 0%,#0FA8E8 52%,#16E0D2 100%);
  --sb-grad-rev:linear-gradient(276deg,#16E0D2 0%,#0FA8E8 48%,#1D6BFF 100%);

  --sb-max:1240px;
  --sb-gutter:clamp(18px,4vw,48px);
  --sb-topbar-h:42px;
  --sb-navbar-h:62px;

  --sb-r-s:10px;
  --sb-r:16px;
  --sb-r-l:26px;
  --sb-ease:cubic-bezier(.22,.7,.28,1);

  --sb-font:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Source Han Sans SC","Noto Sans CJK SC",system-ui,-apple-system,"Segoe UI",sans-serif;
  --sb-mono:ui-monospace,"SFMono-Regular",Menlo,Consolas,"Liberation Mono",monospace;
}
@media (max-width:960px){
  :root{--sb-topbar-h:0px;--sb-navbar-h:60px}
}

/* ---------- 3. Base ---------- */
body{
  position:relative;
  min-height:100vh;
  padding-top:calc(var(--sb-topbar-h) + var(--sb-navbar-h));
  background:var(--sb-ink);
  color:var(--sb-white);
  font-family:var(--sb-font);
  font-size:16px;
  line-height:1.75;
  letter-spacing:.01em;
  overflow-x:hidden;
  -webkit-font-smoothing:antialiased;
}
body::before{
  content:"";
  position:fixed;
  inset:-12%;
  z-index:-1;
  pointer-events:none;
  background:
    radial-gradient(52vw 52vw at 88% 2%,rgba(29,107,255,.30),transparent 62%),
    radial-gradient(44vw 44vw at 4% 24%,rgba(22,224,210,.14),transparent 64%),
    linear-gradient(180deg,#0B1226 0%,#05070F 48%);
  animation:sb-drift 18s ease-in-out infinite alternate;
}
@keyframes sb-drift{
  from{transform:translate3d(-1.2%,-1%,0) scale(1.02)}
  to{transform:translate3d(1.6%,1.4%,0) scale(1.05)}
}

/* ---------- 4. Typography & utilities ---------- */
.sb-h1{font-size:clamp(40px,7vw,96px);line-height:1.02;font-weight:900;letter-spacing:-.02em}
.sb-h2{font-size:clamp(30px,4.4vw,64px);line-height:1.08;font-weight:900;letter-spacing:-.015em}
.sb-h3{font-size:clamp(22px,2.6vw,40px);line-height:1.2;font-weight:800;letter-spacing:-.01em}
.sb-lede{max-width:42ch;font-size:clamp(17px,1.6vw,20px);line-height:1.8;color:rgba(245,248,255,.86)}
.sb-note{font-size:14px;line-height:1.7;color:var(--sb-steel)}
.sb-mono{font-family:var(--sb-mono);font-variant-numeric:tabular-nums;letter-spacing:.04em}
.sb-visually-hidden{
  position:absolute;width:1px;height:1px;margin:-1px;padding:0;
  overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0;
}
.sb-eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-family:var(--sb-mono);font-size:12px;font-weight:700;
  letter-spacing:.2em;color:var(--sb-cyan);text-transform:uppercase;
}
.sb-eyebrow::before{content:"[";color:var(--sb-steel)}
.sb-eyebrow::after{content:"]";color:var(--sb-steel)}
.sb-link{
  position:relative;color:var(--sb-white);font-weight:700;
  padding-bottom:3px;
  background-image:var(--sb-grad);
  background-repeat:no-repeat;
  background-position:0 100%;
  background-size:0% 2px;
  transition:background-size .3s var(--sb-ease),color .2s ease;
}
.sb-link:hover,.sb-link:focus-visible{background-size:100% 2px;color:var(--sb-cyan)}
.sb-mark{
  display:inline-block;padding:2px 10px;border-radius:8px;
  background:var(--sb-orange);color:#170703;font-weight:800;font-size:.92em;
}
.sb-rule{height:1px;border:0;background:var(--sb-grad);opacity:.45}
.sb-hatch{
  background-image:repeating-linear-gradient(6deg,rgba(231,237,249,.06) 0 1px,transparent 1px 14px);
}

/* ---------- 5. Layout ---------- */
.sb-shell{
  width:100%;max-width:var(--sb-max);
  margin-inline:auto;padding-inline:var(--sb-gutter);
}
.sb-section{position:relative;padding-block:clamp(48px,7vw,96px)}
.sb-section--tight{padding-block:clamp(28px,4vw,52px)}
.sb-section--wide{padding-block:clamp(64px,9vw,128px)}
.sb-split{
  display:grid;
  grid-template-columns:minmax(0,var(--sb-a,5)) minmax(0,var(--sb-b,7));
  gap:clamp(20px,3.4vw,56px);
  align-items:start;
}
.sb-grid-2{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:clamp(16px,2.4vw,32px)}
.sb-grid-3{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:clamp(16px,2.4vw,32px)}
.sb-grid-4{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:clamp(14px,2vw,26px)}
.sb-stagger>*:nth-child(2n){transform:translateY(18px)}
.sb-stagger>*:nth-child(3n){transform:translateY(34px)}
[data-section]{scroll-margin-top:calc(var(--sb-navbar-h) + 22px)}

/* ---------- 6. Surfaces ---------- */
.sb-panel{
  position:relative;
  padding:clamp(16px,2.2vw,26px);
  border:1px solid var(--sb-line);
  border-radius:var(--sb-r);
  background:var(--sb-glass-bg);
}
.sb-panel--deep{background:var(--sb-glass-deep)}
.sb-card{
  position:relative;
  padding:clamp(18px,2.4vw,30px);
  border:1px solid var(--sb-line);
  border-radius:var(--sb-r);
  background:linear-gradient(160deg,rgba(11,18,38,.96),rgba(5,7,15,.9));
  transition:transform .28s var(--sb-ease),border-color .28s ease,box-shadow .28s ease;
}
.sb-card:hover{transform:translateY(-4px);border-color:rgba(22,224,210,.45);box-shadow:0 22px 48px rgba(5,7,15,.6)}
.sb-card__num{
  font-family:var(--sb-mono);font-size:12px;letter-spacing:.18em;
  color:var(--sb-cyan);
}
.sb-card__title{font-size:20px;font-weight:800;margin-top:10px}
.sb-card__text{margin-top:8px;font-size:15px;color:rgba(245,248,255,.74)}

/* ---------- 7. Buttons / chips / badges ---------- */
.sb-btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:10px 20px;border-radius:999px;border:1px solid transparent;
  font-size:15px;font-weight:700;letter-spacing:.02em;white-space:nowrap;
  transition:transform .2s var(--sb-ease),box-shadow .26s ease,background .22s ease,color .22s ease,border-color .22s ease;
}
.sb-btn--primary{background:var(--sb-orange);color:#170703;box-shadow:0 10px 26px rgba(255,106,26,.32)}
.sb-btn--primary:hover,.sb-btn--primary:focus-visible{transform:translateY(-2px);box-shadow:0 16px 34px rgba(255,106,26,.46)}
.sb-btn--ghost{border-color:rgba(29,107,255,.6);background:rgba(29,107,255,.14);color:var(--sb-white)}
.sb-btn--ghost:hover,.sb-btn--ghost:focus-visible{background:rgba(29,107,255,.28);border-color:var(--sb-cyan)}
.sb-btn--quiet{border-color:var(--sb-line-strong);background:var(--sb-glass-bg);color:var(--sb-white)}
.sb-btn--quiet:hover,.sb-btn--quiet:focus-visible{border-color:var(--sb-cyan);color:var(--sb-cyan)}
.sb-chip{
  display:inline-flex;align-items:center;gap:6px;
  padding:4px 12px;border-radius:999px;
  border:1px solid var(--sb-line);background:var(--sb-glass-bg);
  font-size:12px;font-weight:700;letter-spacing:.1em;color:var(--sb-steel);
}
.sb-chip--lang{color:var(--sb-cyan);border-color:rgba(22,224,210,.4)}
.sb-chip--ok{color:var(--sb-ok);border-color:rgba(55,227,155,.4)}
.sb-badge{
  display:inline-grid;place-items:center;min-width:26px;height:26px;padding:0 7px;
  border-radius:8px;background:var(--sb-orange);color:#170703;
  font-family:var(--sb-mono);font-size:13px;font-weight:800;
}
.sb-dot{
  display:inline-block;width:8px;height:8px;border-radius:50%;
  margin-right:8px;vertical-align:2px;
  background:var(--sb-ok);box-shadow:0 0 0 4px rgba(55,227,155,.16);
  animation:sb-pulse 2.6s ease-in-out infinite;
}
@keyframes sb-pulse{0%,100%{opacity:.55}50%{opacity:1}}

/* ---------- 8. Status console / index / tabs / crumbs ---------- */
.sb-status{
  border:1px solid var(--sb-line);border-radius:var(--sb-r);
  background:var(--sb-glass-deep);padding:8px 4px;
}
.sb-status__row{
  display:flex;align-items:baseline;justify-content:space-between;gap:14px;
  padding:10px 16px;border-top:1px solid var(--sb-line);font-size:14px;
}
.sb-status__row:first-child{border-top:0}
.sb-status__key{color:var(--sb-steel);letter-spacing:.06em;white-space:nowrap}
.sb-status__val{font-family:var(--sb-mono);font-weight:700;color:var(--sb-white);text-align:right}
.sb-status__val--live{color:var(--sb-cyan)}

.sb-index{display:flex;flex-direction:column;gap:2px}
.sb-index__item{
  display:flex;align-items:center;gap:12px;
  padding:11px 14px;border-radius:var(--sb-r-s);
  border:1px solid transparent;
  font-size:15px;font-weight:600;color:rgba(245,248,255,.72);
  transition:background .22s ease,color .22s ease,border-color .22s ease;
}
.sb-index__item:hover{background:var(--sb-glass-bg);color:var(--sb-white)}
.sb-index__num{
  font-family:var(--sb-mono);font-size:12px;letter-spacing:.1em;color:var(--sb-steel);
  min-width:26px;
}
.sb-index__item[data-current]{
  color:var(--sb-white);background:rgba(255,106,26,.12);border-color:rgba(255,106,26,.5);
}
.sb-index__item[data-current] .sb-index__num{color:var(--sb-orange)}

.sb-tabs{position:relative}
.sb-tabs__list{
  display:flex;gap:6px;padding:5px;overflow-x:auto;
  border:1px solid var(--sb-line);border-radius:999px;background:var(--sb-glass-bg);
  scrollbar-width:none;
}
.sb-tabs__list::-webkit-scrollbar{display:none}
.sb-tabs__tab{
  padding:9px 18px;border-radius:999px;white-space:nowrap;
  font-size:14px;font-weight:700;color:var(--sb-steel);
  transition:background .24s var(--sb-ease),color .24s ease;
}
.sb-tabs__tab:hover{color:var(--sb-white)}
.sb-tabs__tab[aria-selected="true"]{background:var(--sb-orange);color:#170703}
.sb-tabs__panel{padding-top:clamp(20px,3vw,34px)}
.sb-tabs__panel[hidden]{display:none}

.sb-crumbs{font-size:13px;color:var(--sb-steel)}
.sb-crumbs__list{display:flex;flex-wrap:wrap;align-items:center;gap:8px}
.sb-crumbs__item{display:flex;align-items:center;gap:8px}
.sb-crumbs__item+ .sb-crumbs__item::before,
.sb-crumbs__item:not(:first-child)::before{content:"/";color:rgba(138,151,180,.6)}
.sb-crumbs__link:hover,.sb-crumbs__link:focus-visible{color:var(--sb-cyan)}
.sb-crumbs__item[aria-current="page"]{color:var(--sb-white);font-weight:700}

/* ---------- 9. Media containers ---------- */
.sb-media{
  position:relative;width:100%;overflow:hidden;
  border:1px solid var(--sb-line);border-radius:var(--sb-r);
  background:
    linear-gradient(140deg,rgba(29,107,255,.26),rgba(22,224,210,.14) 58%,rgba(5,7,15,.9)),
    repeating-linear-gradient(6deg,rgba(231,237,249,.06) 0 1px,transparent 1px 16px);
  aspect-ratio:4/3;
}
.sb-media--wide{aspect-ratio:16/9}
.sb-media--tall{aspect-ratio:3/4}
.sb-media--band{aspect-ratio:21/7}
.sb-media--tilt{transform:rotate(-1.6deg)}
.sb-media__img{width:100%;height:100%;object-fit:cover;display:block}
.sb-media__caption{
  position:absolute;left:0;right:0;bottom:0;
  padding:14px 16px;font-size:13px;color:rgba(245,248,255,.86);
  background:linear-gradient(180deg,transparent,rgba(5,7,15,.86));
}
.sb-media::after{
  content:"";position:absolute;inset:auto 0 0 0;height:3px;
  background:var(--sb-grad);opacity:.75;
}

/* ---------- 10. CTA band & reveal ---------- */
.sb-cta-band{
  position:relative;
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;
  gap:20px;
  padding:clamp(24px,4vw,44px);
  border:1px solid var(--sb-line);
  border-radius:var(--sb-r-l);
  background:linear-gradient(120deg,rgba(29,107,255,.22),rgba(22,224,210,.1) 55%,rgba(11,18,38,.9));
  overflow:hidden;
}
.sb-cta-band::before{
  content:"";position:absolute;left:0;top:0;bottom:0;width:4px;background:var(--sb-grad);
}
[data-reveal]{
  opacity:0;
  transform:translate3d(0,22px,0);
  transition:opacity .6s var(--sb-ease),transform .6s var(--sb-ease);
  will-change:opacity,transform;
}
[data-reveal].is-in{opacity:1;transform:none}

/* ---------- 11. Skip link ---------- */
.sb-skip{
  position:fixed;left:16px;top:12px;z-index:200;
  padding:10px 20px;border-radius:999px;
  background:var(--sb-cyan);color:#04211F;font-weight:800;
  transform:translateY(-180%);
  transition:transform .24s var(--sb-ease);
}
.sb-skip:focus,.sb-skip:focus-visible{transform:translateY(0);outline-offset:2px}

/* ---------- 12. Header ---------- */
.sb-header{
  position:fixed;top:0;left:0;right:0;z-index:90;
}
.sb-topbar{
  height:var(--sb-topbar-h);
  overflow:hidden;
  background:linear-gradient(100deg,#05070F 0%,#0B1226 62%,#0B1226 100%);
  border-bottom:1px solid var(--sb-line);
  transition:height .34s var(--sb-ease),opacity .26s linear,border-color .34s ease;
}
.sb-header[data-stuck] .sb-topbar{height:0;opacity:0;border-bottom-color:transparent}
.sb-topbar__inner{
  display:flex;align-items:center;justify-content:space-between;gap:18px;
  height:42px;
}
.sb-topbar__brand{display:flex;align-items:center;gap:12px;font-size:13px;min-width:0}
.sb-topbar__mark{
  font-family:var(--sb-mono);font-size:11px;font-weight:800;letter-spacing:.14em;
  padding:3px 8px;border-radius:6px;color:#04070F;background:var(--sb-grad);
}
.sb-topbar__name{color:rgba(245,248,255,.86);font-weight:700;letter-spacing:.04em}
.sb-topbar__tag{color:var(--sb-steel);letter-spacing:.16em}
.sb-topbar__tag::before{content:"—";margin-right:8px;color:rgba(138,151,180,.6)}
.sb-topbar__meta{display:flex;align-items:center;gap:14px;flex:0 0 auto}
.sb-topbar__jump{
  font-size:13px;font-weight:700;color:var(--sb-cyan);
  padding-bottom:2px;border-bottom:1px solid rgba(22,224,210,.5);
  transition:color .2s ease,border-color .2s ease;
}
.sb-topbar__jump:hover,.sb-topbar__jump:focus-visible{color:var(--sb-white);border-color:var(--sb-white)}

.sb-navbar{
  position:relative;
  height:var(--sb-navbar-h);
  transition:box-shadow .3s ease;
}
.sb-navbar::before{
  content:"";position:absolute;inset:0;z-index:-1;
  background:rgba(5,7,15,.84);
  -webkit-backdrop-filter:blur(16px) saturate(150%);
  backdrop-filter:blur(16px) saturate(150%);
  border-bottom:1px solid var(--sb-line);
  transition:background .3s ease,border-color .3s ease;
}
.sb-navbar::after{
  content:"";position:absolute;left:0;right:0;bottom:0;height:1px;
  background:var(--sb-grad);opacity:.5;
}
.sb-header[data-stuck] .sb-navbar::before{background:rgba(5,7,15,.94);border-bottom-color:var(--sb-line-strong)}
.sb-header[data-stuck] .sb-navbar{box-shadow:0 18px 44px rgba(5,7,15,.6)}
.sb-navbar__inner{
  display:flex;align-items:center;gap:clamp(12px,2vw,30px);
  height:var(--sb-navbar-h);
}
.sb-progress{
  position:absolute;left:0;bottom:0;width:100%;height:3px;
  transform:scaleX(0);transform-origin:left center;
  background:var(--sb-grad);pointer-events:none;
}

.sb-brand{display:flex;align-items:center;gap:11px;flex:0 0 auto}
.sb-brand__mark{
  display:grid;place-items:center;width:36px;height:36px;border-radius:11px;
  background:var(--sb-grad);color:#04070F;
  font-family:var(--sb-mono);font-size:13px;font-weight:800;letter-spacing:.04em;
  box-shadow:0 0 0 1px rgba(22,224,210,.45),0 10px 26px rgba(29,107,255,.38);
}
.sb-brand__text{display:flex;flex-direction:column;line-height:1.16}
.sb-brand__name{font-size:17px;font-weight:900;letter-spacing:.08em}
.sb-brand__sub{font-size:11px;color:var(--sb-steel);letter-spacing:.06em}

.sb-nav{flex:1 1 auto;display:flex;align-items:center;min-width:0}
.sb-nav__list{display:flex;align-items:center;gap:clamp(2px,.8vw,8px)}
.sb-nav__link{
  position:relative;display:block;padding:9px 12px;border-radius:9px;
  font-size:15px;font-weight:700;color:rgba(245,248,255,.76);
  transition:color .2s ease,background .2s ease;
}
.sb-nav__link::after{
  content:"";position:absolute;left:12px;right:12px;bottom:2px;height:2px;border-radius:2px;
  background:var(--sb-grad);transform:scaleX(0);transform-origin:left center;
  transition:transform .3s var(--sb-ease);
}
.sb-nav__link:hover,.sb-nav__link:focus-visible{color:var(--sb-white);background:var(--sb-glass-bg)}
.sb-nav__link:hover::after,.sb-nav__link:focus-visible::after{transform:scaleX(1)}
.sb-nav__link[aria-current="page"]{color:var(--sb-white)}
.sb-nav__link[aria-current="page"]::after{transform:scaleX(1);height:3px}
.sb-nav__quick{display:none}

.sb-navbar__actions{display:flex;align-items:center;gap:10px;flex:0 0 auto;margin-left:auto}
.sb-navbar__cta{padding:9px 18px;font-size:14px}

.sb-burger{
  display:none;align-items:center;gap:9px;flex:0 0 auto;margin-left:auto;
  padding:9px 13px;border-radius:11px;
  border:1px solid var(--sb-line-strong);background:var(--sb-glass-bg);
  color:var(--sb-white);
  transition:border-color .2s ease,background .2s ease;
}
.sb-burger:hover{border-color:var(--sb-cyan)}
.sb-burger__box{position:relative;display:block;width:18px;height:12px}
.sb-burger__box span{
  position:absolute;left:0;right:0;height:2px;border-radius:2px;
  background:var(--sb-grad);
  transition:transform .28s var(--sb-ease),opacity .2s linear,top .28s var(--sb-ease);
}
.sb-burger__box span:nth-child(1){top:0}
.sb-burger__box span:nth-child(2){top:5px}
.sb-burger__box span:nth-child(3){top:10px}
.sb-burger[aria-expanded="true"] .sb-burger__box span:nth-child(1){top:5px;transform:rotate(45deg)}
.sb-burger[aria-expanded="true"] .sb-burger__box span:nth-child(2){opacity:0}
.sb-burger[aria-expanded="true"] .sb-burger__box span:nth-child(3){top:5px;transform:rotate(-45deg)}
.sb-burger__label{font-size:14px;font-weight:700;letter-spacing:.08em}

/* ---------- 13. Footer ---------- */
.sb-footer{
  position:relative;
  margin-top:clamp(64px,9vw,120px);
  overflow:hidden;
  border-top:1px solid var(--sb-line);
  background:linear-gradient(180deg,#05070F 0%,#080D1C 42%,#05070F 100%);
}
.sb-footer__glow{
  position:absolute;left:-8%;right:-8%;bottom:-46%;height:78%;
  pointer-events:none;
  background:
    radial-gradient(48% 100% at 78% 100%,rgba(29,107,255,.3),transparent 72%),
    radial-gradient(38% 92% at 12% 100%,rgba(22,224,210,.16),transparent 74%);
}
.sb-footer__inner{position:relative;padding-block:clamp(44px,6vw,76px) 28px}
.sb-footer__grid{
  display:grid;
  grid-template-columns:1.5fr 1fr 1fr 1.2fr;
  gap:clamp(22px,3vw,48px);
}
.sb-footer__col{min-width:0}
.sb-footer__brand{
  font-size:clamp(19px,2.2vw,25px);font-weight:900;letter-spacing:.04em;
  padding-bottom:12px;position:relative;
}
.sb-footer__brand::after{
  content:"";position:absolute;left:0;bottom:0;width:62px;height:3px;border-radius:3px;
  background:var(--sb-grad);
}
.sb-footer__note{margin-top:14px;font-size:14px;color:var(--sb-steel);max-width:34ch}
.sb-footer__status{
  margin-top:16px;font-size:13px;color:rgba(55,227,155,.9);
  display:flex;align-items:center;
}
.sb-footer__title{
  font-size:13px;font-weight:800;letter-spacing:.2em;color:var(--sb-steel);
  margin-bottom:16px;
}
.sb-footer__list{display:flex;flex-direction:column;gap:11px}
.sb-footer__list a{
  display:inline-block;font-size:15px;font-weight:600;color:rgba(245,248,255,.78);
  transition:color .2s ease,transform .2s var(--sb-ease);
}
.sb-footer__list a:hover,.sb-footer__list a:focus-visible{color:var(--sb-cyan);transform:translateX(4px)}
.sb-footer__list--plain li{font-size:14px;color:rgba(245,248,255,.78);line-height:1.7}
.sb-footer__hint{margin-top:14px;font-size:13px;color:var(--sb-steel);max-width:30ch}
.sb-footer__base{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;
  gap:14px;margin-top:clamp(32px,4vw,52px);padding-top:20px;
  border-top:1px solid var(--sb-line);
}
.sb-footer__legal{margin:0;font-size:13px;color:var(--sb-steel)}
.sb-footer__base-note{margin:0;font-size:13px;color:var(--sb-steel);letter-spacing:.14em}

/* ---------- 14. Responsive ---------- */
@media (max-width:1180px){
  .sb-navbar__cta.sb-btn--ghost{display:none}
}
@media (max-width:1080px){
  .sb-footer__grid{grid-template-columns:1.4fr 1fr 1fr;row-gap:34px}
  .sb-footer__col:last-child{grid-column:1 / -1}
}
@media (max-width:960px){
  .sb-topbar{display:none}
  .sb-navbar__actions{display:none}
  .sb-burger{display:inline-flex}
  .sb-nav{
    position:fixed;
    top:var(--sb-navbar-h);right:0;bottom:0;
    width:min(86vw,400px);
    flex-direction:column;align-items:stretch;gap:0;
    padding:26px var(--sb-gutter) 44px;
    overflow-y:auto;
    background:linear-gradient(180deg,rgba(11,18,38,.97),rgba(5,7,15,.99));
    border-left:1px solid var(--sb-line);
    box-shadow:-26px 0 60px rgba(5,7,15,.72);
    transform:translateX(104%);
    opacity:0;visibility:hidden;
    transition:transform .34s var(--sb-ease),opacity .26s linear,visibility .34s linear;
  }
  .sb-header[data-open] .sb-nav{transform:none;opacity:1;visibility:visible}
  .sb-header[data-open] .sb-navbar::before{background:rgba(5,7,15,.96)}
  .sb-nav__list{flex-direction:column;align-items:stretch;gap:0}
  .sb-nav__link{
    padding:15px 2px;border-radius:0;font-size:18px;
    border-bottom:1px solid var(--sb-line);
  }
  .sb-nav__link::after{left:0;right:auto;bottom:-1px;width:56px}
  .sb-nav__link:hover,.sb-nav__link:focus-visible{background:transparent}
  .sb-nav__quick{display:flex;flex-direction:column;gap:12px;margin-top:26px}
  .sb-nav__quick-link{
    font-size:15px;font-weight:700;color:var(--sb-cyan);
    padding:11px 14px;border-radius:12px;
    border:1px solid rgba(22,224,210,.34);background:rgba(22,224,210,.08);
    transition:background .2s ease,color .2s ease;
  }
  .sb-nav__quick-link:hover,.sb-nav__quick-link:focus-visible{background:rgba(22,224,210,.18);color:var(--sb-white)}
  .sb-brand__sub{display:none}
  .sb-topbar__tag{display:none}
}
@media (max-width:760px){
  .sb-split,.sb-grid-2,.sb-grid-3,.sb-grid-4{grid-template-columns:minmax(0,1fr)}
  .sb-stagger>*:nth-child(n){transform:none}
  .sb-footer__grid{grid-template-columns:1fr 1fr}
  .sb-footer__col--brand{grid-column:1 / -1}
  .sb-footer__col:last-child{grid-column:1 / -1}
  .sb-footer__base{flex-direction:column;align-items:flex-start}
  .sb-cta-band{flex-direction:column;align-items:flex-start}
}
@media (max-width:480px){
  .sb-footer__grid{grid-template-columns:1fr}
  .sb-footer__col--brand,.sb-footer__col:last-child{grid-column:auto}
  .sb-nav{width:100%}
}

/* ---------- 15. Motion & accessibility ---------- */
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
    scroll-behavior:auto !important;
  }
  body::before{inset:0}
  [data-reveal]{opacity:1;transform:none}
}