:root{
  --ink:#0B1020;
  --ink-2:#121a33;
  --mag:#FF3D57;
  --amb:#FFC53D;
  --txt:#EAF0FB;
  --dim:#A9B4CC;
  --line:rgba(234,240,251,.12);
  --r:28px;
  --f1:'Russo One',system-ui,-apple-system,'PingFang SC','Microsoft YaHei',sans-serif;
  --f2:'Chakra Petch',system-ui,-apple-system,'PingFang SC','Microsoft YaHei',sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  margin:0;
  background:var(--ink);
  color:var(--txt);
  font:400 17px/1.78 var(--f2);
  overflow-x:hidden;
  -webkit-font-smoothing:antialiased;
}
body.nav-open{overflow:hidden}
img{max-width:100%;height:auto;display:block}
a{color:var(--amb);text-decoration:none;transition:color .2s ease}
a:hover,a:focus-visible{color:var(--mag)}
h1,h2,h3,h4{font-family:var(--f1);font-weight:400;line-height:1.18;margin:0;letter-spacing:.01em}
hr{border:0;display:block}
:focus-visible{outline:2px solid var(--amb);outline-offset:3px;border-radius:6px}

/* 层叠视差背景 */
.depth{position:fixed;inset:-12% -2% -10%;z-index:0;pointer-events:none;overflow:hidden}
.depth i{position:absolute;display:block;border-radius:50%;filter:blur(80px);will-change:transform}
.d1{width:520px;height:520px;background:var(--mag);opacity:.30;top:-90px;left:-140px}
.d2{width:440px;height:440px;background:var(--amb);opacity:.16;top:36%;right:-170px;filter:blur(100px)}
.d3{width:640px;height:640px;background:#2A3B78;opacity:.55;bottom:-240px;left:14%}
.d-line{position:absolute;top:22%;left:-30%;width:160%;height:2px;background:linear-gradient(90deg,transparent,var(--mag),transparent);opacity:.45;will-change:transform}

/* 顶部条 */
main{position:relative;z-index:1;padding-top:64px}
.site-head{
  position:fixed;top:0;left:0;right:0;z-index:50;
  display:flex;align-items:center;gap:10px;
  min-height:64px;padding:8px clamp(12px,3vw,32px);
  background:rgba(11,16,32,.86);
  border-bottom:1px solid rgba(255,197,61,.2);
  backdrop-filter:blur(14px);
}
.brand{display:inline-flex;align-items:center;gap:9px;min-height:44px;color:var(--txt);font-family:var(--f1);font-size:18px;letter-spacing:.04em}
.brand:hover{color:var(--amb)}
.brand-mark{border-radius:10px}
.brand-dot{width:14px;height:14px;border-radius:4px;background:linear-gradient(135deg,var(--mag),var(--amb));flex:none}
.brand-name{white-space:nowrap}

.head-nav{flex:1;display:flex;justify-content:center;min-width:0}
.head-row{display:flex;flex-wrap:wrap;justify-content:center;gap:0 2px;margin:0}
.head-row a{
  display:inline-flex;align-items:center;min-height:44px;padding:0 9px;
  font-size:15px;color:var(--dim);border-radius:10px;
}
.head-row a:hover{color:var(--amb);background:rgba(255,197,61,.08)}

.head-cta{
  display:inline-flex;align-items:center;min-height:44px;padding:0 18px;flex:none;
  border-radius:99px;background:var(--mag);color:#fff;font-family:var(--f1);font-size:14px;letter-spacing:.05em;
}
.head-cta:hover{background:var(--amb);color:var(--ink)}

.burger{
  display:none;flex:none;width:46px;height:46px;padding:0;
  background:rgba(255,255,255,.06);border:1px solid var(--line);border-radius:14px;
  cursor:pointer;align-items:center;justify-content:center;flex-direction:column;gap:5px;
}
.burger span{display:block;width:20px;height:2px;background:var(--txt);border-radius:2px;transition:transform .25s ease,opacity .25s ease}
.burger[aria-expanded="true"] span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.burger[aria-expanded="true"] span:nth-child(2){opacity:0}
.burger[aria-expanded="true"] span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}

/* 全屏菜单 */
.menu{
  position:fixed;inset:0;z-index:45;
  display:grid;place-items:center;
  background:rgba(11,16,32,.97);
  opacity:0;visibility:hidden;transition:opacity .3s ease,visibility .3s ease;
  padding:96px 20px 40px;overflow-y:auto;
}
.menu.on{opacity:1;visibility:visible}
.menu-row{display:flex;flex-direction:column;gap:4px;margin:0;text-align:center}
.menu-row a{
  display:flex;align-items:center;justify-content:center;min-height:54px;padding:6px 14px;
  font-family:var(--f1);font-size:clamp(20px,4.6vw,28px);color:var(--txt);
  border-bottom:1px solid rgba(234,240,251,.08);
}
.menu-row a:hover{color:var(--amb)}

/* 骨架 */
.wrap{
  position:relative;z-index:1;max-width:1180px;margin:0 auto;
  padding:0 clamp(14px,3vw,32px) 78px;
  display:grid;grid-template-columns:minmax(0,1fr) 252px;gap:0 46px;
}
.hero,.bar{grid-column:1/-1}
.story{grid-column:1;min-width:0}
.side{grid-column:2}
main [id]{scroll-margin-top:134px}

/* 首屏 */
.hero{
  position:relative;min-height:calc(100vh - 64px);
  display:grid;place-items:center;text-align:center;
  padding:60px 0 84px;overflow:hidden;isolation:isolate;
}
.hero-band{
  position:absolute;left:-26%;top:24%;width:152%;height:clamp(130px,26vh,260px);
  background:linear-gradient(96deg,var(--mag),var(--amb));
  clip-path:polygon(0 26%,100% 0,100% 74%,0 100%);
  opacity:.9;z-index:-2;will-change:transform;
}
.hero-slab{
  position:absolute;left:-10%;top:58%;width:120%;height:3px;
  background:linear-gradient(90deg,transparent,rgba(255,255,255,.65),transparent);
  z-index:-1;transform:rotate(-7deg);
}
.hero-in{max-width:900px;padding:0 4px}
.hero-kicker{
  margin:0 0 14px;font-family:var(--f1);font-size:14px;letter-spacing:.42em;
  text-transform:uppercase;color:var(--amb);
}
.hero h1{
  font-size:clamp(2.4rem,8.6vw,6.2rem);line-height:1.04;letter-spacing:.01em;
  text-shadow:0 12px 44px rgba(6,9,20,.85);
}
.hero-lede{
  margin:22px auto 0;max-width:640px;font-size:clamp(16px,1.7vw,18px);
  color:rgba(234,240,251,.9);text-shadow:0 6px 24px rgba(6,9,20,.9);
}
.hero-go{margin:26px 0 0}
.hero-go a{
  display:inline-flex;align-items:center;min-height:48px;padding:0 28px;
  border-radius:99px;background:var(--amb);color:var(--ink);font-family:var(--f1);font-size:16px;
}
.hero-go a:hover{background:var(--mag);color:#fff}

/* 锚点粘条 */
.bar{
  position:sticky;top:64px;z-index:30;
  margin:0 calc(-1 * clamp(14px,3vw,32px)) 10px;
  padding:6px clamp(14px,3vw,32px);
  background:rgba(11,16,32,.94);
  border-top:1px solid rgba(255,61,87,.35);
  border-bottom:1px solid var(--line);
  backdrop-filter:blur(10px);
}
.bar-row{display:flex;gap:6px;margin:0;overflow-x:auto;scrollbar-width:none}
.bar-row::-webkit-scrollbar{display:none}
.bar-row a{
  display:inline-flex;align-items:center;min-height:42px;padding:0 13px;flex:none;
  font-size:15px;color:var(--dim);border-radius:99px;background:rgba(255,255,255,.05);
}
.bar-row a:hover{color:var(--ink);background:var(--amb)}

/* 正文 */
.prose{padding:34px 0 20px}
.prose > article{
  padding:40px 0;
  border-top:1px solid var(--line);
}
.prose > article:first-child{border-top:0;padding-top:18px}
.prose > article::before{
  content:"";display:block;width:62px;height:6px;border-radius:99px;
  background:linear-gradient(90deg,var(--mag),var(--amb));margin-bottom:20px;
}
.prose > article:nth-of-type(even){
  margin:0 -20px;padding:40px 20px;border-radius:var(--r);
  background:linear-gradient(180deg,rgba(255,61,87,.09),rgba(255,197,61,.03));
  border-top-color:transparent;
}
.prose h2,.prose h3{margin:6px 0 12px;font-size:clamp(1.45rem,3.3vw,2.1rem)}
.prose h3{font-size:clamp(1.2rem,2.4vw,1.5rem)}
.prose hr{
  height:2px;margin:0 0 20px;border-radius:2px;
  background:linear-gradient(90deg,var(--amb),rgba(255,197,61,0));
}
.prose p{margin:0 0 16px}
.prose ul,.prose ol{margin:0 0 18px;padding-left:22px}
.prose li{margin:0 0 9px}
.prose strong{color:var(--amb)}
.prose blockquote{
  margin:20px 0;padding:14px 20px;border-left:4px solid var(--mag);
  background:rgba(255,61,87,.09);border-radius:0 var(--r) var(--r) 0;
}
.prose blockquote p:last-child{margin:0}
.prose img{border-radius:var(--r);margin:16px 0}
.prose a{text-decoration:underline;text-underline-offset:3px}
.prose code{
  font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:.94em;
  background:rgba(255,255,255,.09);padding:2px 6px;border-radius:6px;
}

/* 侧栏 */
.side{
  position:sticky;top:126px;align-self:start;margin-top:34px;
  padding:20px 18px;border-radius:24px;
  background:rgba(255,255,255,.055);border:1px solid var(--line);
}
.side h2{font-size:19px;margin:0}
.side hr{margin:10px 0 12px;height:2px;background:linear-gradient(90deg,var(--mag),transparent)}
.side-link{margin:0}
.side-link a{
  display:inline-flex;align-items:center;min-height:40px;font-size:16px;color:var(--txt);
}
.side-link a:hover{color:var(--amb)}
.side-top{margin:14px 0 0;padding-top:12px;border-top:1px solid var(--line)}
.side-top a{display:inline-flex;align-items:center;min-height:40px;font-size:15px;color:var(--dim)}

/* 页脚 */
.site-foot{
  position:relative;z-index:1;
  display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:20px 24px;
  max-width:1180px;margin:0 auto;
  padding:44px clamp(16px,3vw,32px) 30px;
  border-top:1px solid rgba(255,197,61,.24);
}
.site-foot p{margin:0}
.foot-cta{
  grid-column:1/-1;
  display:flex;flex-wrap:wrap;gap:14px 18px;align-items:center;justify-content:space-between;
  padding:24px 28px;border-radius:var(--r);
  background:linear-gradient(100deg,var(--mag),var(--amb));
  color:var(--ink);font-family:var(--f1);font-size:clamp(1.15rem,3.4vw,1.9rem);
}
.foot-cta a{
  display:inline-flex;align-items:center;min-height:44px;padding:0 20px;
  border-radius:99px;background:var(--ink);color:var(--amb);font-size:15px;
}
.foot-cta a:hover{background:#fff;color:var(--mag)}
.foot-brand{font-family:var(--f1);font-size:17px;color:var(--amb);letter-spacing:.06em}
.foot-col{display:flex;flex-direction:column}
.foot-col a{display:inline-flex;align-items:center;min-height:40px;font-size:15px;color:var(--dim)}
.foot-col a:hover{color:var(--amb)}
.site-foot small{
  grid-column:1/-1;display:block;padding-top:14px;font-size:14px;
  color:rgba(169,180,204,.85);border-top:1px solid var(--line);
}

/* 滚动出现 */
.rv{opacity:0;transform:translateY(30px);transition:opacity .7s ease,transform .7s cubic-bezier(.22,.8,.3,1)}
.rv.in{opacity:1;transform:none}

@media (max-width:1000px){
  .wrap{grid-template-columns:minmax(0,1fr)}
  .head-nav{display:none}
  .burger{display:flex}
  .side{grid-column:1;position:static;margin-top:8px}
  .site-foot{grid-template-columns:1fr 1fr}
  .foot-brand{grid-column:1/-1}
}
@media (max-width:640px){
  body{font-size:16px}
  .head-cta{display:none}
  .hero{min-height:calc(100vh - 64px);padding-top:36px}
  .hero-kicker{letter-spacing:.3em;font-size:13px}
  .prose > article:nth-of-type(even){margin:0 -12px;padding:34px 12px}
  .site-foot{grid-template-columns:1fr 1fr;gap:16px}
  .foot-cta{padding:20px 20px}
}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  .rv{opacity:1;transform:none;transition:none}
  .depth i,.depth b,.hero-band{transform:none !important}
  *{animation-duration:.01ms !important;transition-duration:.01ms !important}
}

button[aria-expanded]{min-width:44px;min-height:44px}