@import url('https://fonts.googleapis.com/css2?family=Outfit:wght@300;400;500;600;700&family=Work+Sans:wght@300;400;500;600;700&display=swap');

:root{
  --red:#ff0000;
  --violet:#8b00ff;
  --ink:#261717;
  --line:rgba(255,255,255,.18);
  --txt:#f8f1f1;
  --dim:rgba(255,255,255,.74);
  --r:18px;
  --rail:288px;
}

*,*::before,*::after{box-sizing:border-box}

html{
  background:var(--ink);
  scroll-behavior:smooth;
  -webkit-text-size-adjust:100%;
}

body{
  margin:0;
  min-height:100vh;
  background:transparent;
  color:var(--txt);
  font-family:'Outfit','Work Sans',system-ui,-apple-system,'PingFang SC','Hiragino Sans GB','Microsoft YaHei',sans-serif;
  font-size:17px;
  line-height:1.78;
  font-weight:300;
  letter-spacing:.01em;
  -webkit-font-smoothing:antialiased;
}

body::before{
  content:"";
  position:fixed;
  inset:0;
  z-index:-2;
  pointer-events:none;
  background:
    radial-gradient(46vw 46vw at 8% 10%, rgba(255,0,0,.58), transparent 62%),
    radial-gradient(52vw 52vw at 90% 42%, rgba(139,0,255,.58), transparent 66%),
    radial-gradient(42vw 42vw at 38% 98%, rgba(255,0,0,.34), transparent 62%),
    radial-gradient(64vw 64vw at 66% 70%, rgba(139,0,255,.22), transparent 72%);
  filter:blur(40px) saturate(135%);
  animation:blob 26s ease-in-out infinite alternate;
}

body::after{
  content:"";
  position:fixed;
  inset:0;
  z-index:-1;
  pointer-events:none;
  background:linear-gradient(180deg, rgba(38,23,23,.28) 0%, rgba(38,23,23,.72) 55%, rgba(38,23,23,.9) 100%);
}

@keyframes blob{
  from{transform:translate3d(-1.5%,-1%,0) scale(1)}
  to{transform:translate3d(2%,2.5%,0) scale(1.09)}
}

.glass{
  background:linear-gradient(155deg, rgba(255,255,255,.17), rgba(255,255,255,.055));
  -webkit-backdrop-filter:blur(16px);
  backdrop-filter:blur(16px);
  border:1px solid var(--line);
  border-radius:var(--r);
  box-shadow:0 26px 62px rgba(0,0,0,.4), inset 0 1px 0 rgba(255,255,255,.22);
}

/* ---------- 左侧栏 ---------- */
.rail{
  position:fixed;
  inset:0 auto 0 0;
  width:var(--rail);
  z-index:30;
  display:flex;
  flex-direction:column;
  gap:18px;
  padding:22px 18px 26px;
  background:linear-gradient(165deg, rgba(255,255,255,.14), rgba(255,255,255,.04));
  -webkit-backdrop-filter:blur(18px) saturate(125%);
  backdrop-filter:blur(18px) saturate(125%);
  border-right:1px solid var(--line);
  overflow-y:auto;
  overscroll-behavior:contain;
}

.brand{
  display:flex;
  align-items:center;
  gap:10px;
  min-height:46px;
  padding:6px 8px;
  color:#fff;
  text-decoration:none;
  font-weight:600;
  font-size:1.02rem;
  letter-spacing:.01em;
  border-radius:14px;
}

.brand:focus-visible{outline:2px solid var(--red);outline-offset:2px}

.mark{
  flex:0 0 auto;
  width:34px;
  height:34px;
  border-radius:11px;
  display:grid;
  place-items:center;
  font-size:.92rem;
  font-weight:600;
  color:#fff;
  background:linear-gradient(135deg,var(--red),var(--violet));
  box-shadow:0 8px 22px rgba(255,0,0,.35);
}

.brand-name{
  min-width:0;
  overflow:hidden;
  text-overflow:ellipsis;
  white-space:nowrap;
}

.rail-nav{flex:1 1 auto;min-height:0}

.rail-nav ul{
  list-style:none;
  margin:0;
  padding:0;
  display:flex;
  flex-direction:column;
  gap:4px;
}

.rail-nav a{
  position:relative;
  display:flex;
  align-items:center;
  min-height:44px;
  padding:10px 14px;
  border-radius:12px;
  color:rgba(255,255,255,.84);
  text-decoration:none;
  font-size:.97rem;
  line-height:1.4;
  transition:background .22s ease, color .22s ease, transform .22s ease;
}

.rail-nav a::before{
  content:"";
  position:absolute;
  left:5px;
  top:50%;
  width:3px;
  height:0;
  border-radius:3px;
  background:linear-gradient(180deg,var(--red),var(--violet));
  transform:translateY(-50%);
  transition:height .22s ease;
}

.rail-nav a:hover,
.rail-nav a:focus-visible{
  background:rgba(255,0,0,.2);
  color:#fff;
}

.rail-nav a[aria-current="true"]{
  background:rgba(255,255,255,.15);
  color:#fff;
  font-weight:500;
}

.rail-nav a[aria-current="true"]::before{height:20px}

.rail-nav a:focus-visible{outline:2px solid var(--violet);outline-offset:2px}

.has-sub > a{justify-content:space-between;gap:8px}

.caret{
  width:8px;
  height:8px;
  margin-top:-3px;
  border-right:2px solid currentColor;
  border-bottom:2px solid currentColor;
  transform:rotate(45deg);
  opacity:.6;
  transition:transform .22s ease;
}

.has-sub:hover .caret,
.has-sub:focus-within .caret{transform:rotate(225deg);margin-top:3px}

.rail-nav .sub{
  display:none;
  margin:4px 0 6px 14px;
  padding-left:10px;
  border-left:1px solid rgba(255,255,255,.22);
  gap:2px;
}

.has-sub:hover .sub,
.has-sub:focus-within .sub{display:flex}

.rail-nav .sub a{font-size:.9rem;min-height:42px;color:rgba(255,255,255,.72)}

.rail-contact{
  display:flex;
  align-items:center;
  justify-content:center;
  min-height:44px;
  padding:10px 16px;
  border-radius:999px;
  border:1px solid rgba(255,255,255,.28);
  background:rgba(255,0,0,.2);
  color:#fff;
  text-decoration:none;
  font-size:.94rem;
  letter-spacing:.06em;
  transition:background .22s ease;
}

.rail-contact:hover{background:rgba(255,0,0,.42)}
.rail-contact:focus-visible{outline:2px solid #fff;outline-offset:2px}

/* ---------- 主区 ---------- */
main{margin-left:var(--rail);display:block}

.wrap{
  padding:0 clamp(16px,3.4vw,44px);
}

.hero-stage{
  position:relative;
  min-height:100vh;
  min-height:100dvh;
  display:flex;
  align-items:center;
  justify-content:flex-end;
  padding:clamp(18px,3vw,48px) 0;
  overflow:hidden;
}

.hero-ghost{
  position:absolute;
  right:-.03em;
  top:50%;
  transform:translateY(-50%);
  font-size:clamp(3.6rem,13vw,13rem);
  font-weight:700;
  line-height:.86;
  letter-spacing:-.05em;
  white-space:nowrap;
  color:rgba(255,255,255,.045);
  -webkit-text-stroke:1px rgba(255,255,255,.16);
  pointer-events:none;
  will-change:transform;
}

.hero{
  position:relative;
  z-index:1;
  width:min(100%,660px);
  border-radius:30px;
  padding:clamp(24px,3.2vw,46px);
  text-align:right;
  display:flex;
  flex-direction:column;
  align-items:flex-end;
  gap:16px;
}

.kicker{
  margin:0;
  font-size:.82rem;
  font-weight:500;
  letter-spacing:.3em;
  color:rgba(255,255,255,.72);
}

.kicker > span{
  display:inline-block;
  padding-bottom:6px;
  border-bottom:1px solid rgba(255,255,255,.35);
}

.hero h1{
  margin:0;
  font-size:clamp(2rem,5vw,3.5rem);
  line-height:1.12;
  font-weight:600;
  letter-spacing:-.025em;
  text-wrap:balance;
}

.lede{
  margin:0;
  max-width:46ch;
  font-size:1rem;
  line-height:1.7;
  color:var(--dim);
}

.cta{
  display:inline-flex;
  align-items:center;
  min-height:48px;
  padding:0 30px;
  border-radius:999px;
  background:linear-gradient(96deg,var(--red),var(--violet));
  color:#fff;
  text-decoration:none;
  font-weight:600;
  font-size:1rem;
  letter-spacing:.04em;
  box-shadow:0 16px 38px rgba(255,0,0,.36);
  transition:transform .22s ease, box-shadow .22s ease;
}

.cta:hover{transform:translateY(-2px);box-shadow:0 20px 46px rgba(139,0,255,.45)}
.cta:focus-visible{outline:2px solid #fff;outline-offset:3px}

.stream-stage{padding:6px 0 88px}

.stream{
  max-width:900px;
  margin:0 auto;
  font-size:1.02rem;
}

.stream > section{
  scroll-margin-top:132px;
  margin:0 0 22px;
  padding:clamp(20px,2.8vw,36px);
  border-radius:var(--r);
  background:linear-gradient(160deg, rgba(255,255,255,.13), rgba(255,255,255,.05));
  -webkit-backdrop-filter:blur(16px);
  backdrop-filter:blur(16px);
  border:1px solid rgba(255,255,255,.16);
  box-shadow:0 22px 54px rgba(0,0,0,.34), inset 0 1px 0 rgba(255,255,255,.2);
}

.stream h2,
.stream h3{
  font-weight:600;
  line-height:1.38;
  letter-spacing:-.012em;
  color:#fff;
}

.stream h2{
  font-size:clamp(1.34rem,2.5vw,1.78rem);
  margin:0 0 14px;
}

.stream h2 > span{
  position:relative;
  display:inline-block;
  padding-left:22px;
}

.stream h2 > span::before{
  content:"";
  position:absolute;
  left:0;
  top:.36em;
  width:10px;
  height:10px;
  border-radius:3px;
  background:linear-gradient(135deg,var(--red),var(--violet));
  box-shadow:0 0 16px rgba(255,0,0,.6);
}

.stream h3{
  font-size:1.12rem;
  margin:24px 0 10px;
}

.stream h3 > span{
  display:inline-block;
  border-bottom:1px solid rgba(255,0,0,.6);
  padding-bottom:3px;
}

.stream p{margin:0 0 14px}
.stream p:last-child{margin-bottom:0}

.stream a{
  color:#ff9c9c;
  text-decoration:underline;
  text-decoration-color:rgba(255,156,156,.55);
  text-underline-offset:3px;
}

.stream a:hover{color:#fff;text-decoration-color:#fff}

.stream strong{color:#fff;font-weight:600}

.stream ul,
.stream ol{margin:0 0 14px;padding-left:1.25em}

.stream li{margin:.34em 0}

.stream li::marker{color:rgba(255,0,0,.85)}

.stream blockquote{
  margin:18px 0;
  padding:12px 18px;
  border-left:3px solid var(--red);
  border-radius:0 14px 14px 0;
  background:rgba(255,255,255,.07);
  color:var(--dim);
}

.stream img{
  display:block;
  max-width:100%;
  height:auto;
  margin:16px 0;
  border-radius:14px;
}

.stream figure{margin:18px 0}
.stream figcaption{font-size:.86rem;color:rgba(255,255,255,.6);margin-top:8px}

.stream table{
  display:block;
  width:100%;
  overflow-x:auto;
  border-collapse:collapse;
  font-size:.95rem;
  margin:16px 0;
}

.stream th,
.stream td{
  border:1px solid rgba(255,255,255,.2);
  padding:10px 13px;
  text-align:left;
  white-space:normal;
}

.stream th{background:rgba(255,0,0,.2);color:#fff;font-weight:600}

.stream hr{
  border:0;
  border-top:1px solid rgba(255,255,255,.18);
  margin:26px 0;
}

/* ---------- 页脚 ---------- */
.foot{
  margin-left:var(--rail);
  padding:clamp(30px,4vw,60px) clamp(16px,3.4vw,44px) 26px;
  display:grid;
  grid-template-columns:1.35fr 1fr 1fr;
  gap:26px 22px;
  align-items:start;
  border-top:1px solid var(--line);
  background:linear-gradient(180deg, rgba(255,255,255,.08), rgba(255,255,255,.03));
  -webkit-backdrop-filter:blur(14px);
  backdrop-filter:blur(14px);
}

.foot p{margin:0}

.foot-cta a{
  display:inline-flex;
  align-items:center;
  min-height:52px;
  padding:0 30px;
  border-radius:999px;
  background:linear-gradient(96deg,var(--red),var(--violet));
  color:#fff;
  text-decoration:none;
  font-weight:600;
  font-size:1.05rem;
  letter-spacing:.05em;
  box-shadow:0 16px 40px rgba(139,0,255,.35);
}

.foot-cta a:focus-visible{outline:2px solid #fff;outline-offset:3px}

.foot-links{display:flex;flex-direction:column;gap:2px}

.foot-links a{
  display:flex;
  align-items:center;
  min-height:40px;
  color:rgba(255,255,255,.78);
  text-decoration:none;
  font-size:.95rem;
}

.foot-links a:hover{color:#fff}

.foot-brand{
  font-weight:600;
  font-size:1rem;
  color:#fff;
  padding-top:12px;
}

.foot-copy{
  grid-column:1 / -1;
  margin-top:6px;
  padding-top:16px;
  border-top:1px solid rgba(255,255,255,.14);
  font-size:.85rem;
  color:rgba(255,255,255,.58);
}

/* ---------- 移动端 ---------- */
@media (max-width:900px){
  .rail{
    position:static;
    width:auto;
    inset:auto;
    flex-direction:column;
    gap:10px;
    padding:12px 14px 14px;
    border-right:0;
    border-bottom:1px solid var(--line);
    overflow:visible;
  }

  .rail-nav{flex:0 0 auto}

  .rail-nav ul{
    flex-direction:row;
    align-items:flex-start;
    gap:6px;
    overflow-x:auto;
    padding-bottom:4px;
    -webkit-overflow-scrolling:touch;
  }

  .rail-nav li{flex:0 0 auto}

  .rail-nav li.has-sub{display:flex;flex-direction:column}

  .rail-nav a{white-space:nowrap;padding:10px 13px}

  .rail-nav a::before{display:none}

  .rail-nav a[aria-current="true"]{box-shadow:inset 0 -2px 0 var(--red)}

  .rail .has-sub .sub{
    display:flex;
    flex-direction:row;
    margin:4px 0 0 10px;
    padding-left:8px;
  }

  .rail .has-sub .sub a{min-height:40px;font-size:.86rem}

  .rail-contact{align-self:stretch;min-height:42px}

  main,
  .foot{margin-left:0}

  .hero-stage{
    justify-content:flex-end;
    padding:22px 0 34px;
    min-height:0;
  }

  .hero-ghost{font-size:clamp(3rem,17vw,7rem);opacity:.85}

  .hero{padding:22px 20px;gap:14px;border-radius:22px;text-align:right}

  .hero h1{font-size:clamp(1.85rem,8vw,2.4rem)}

  .lede{font-size:.98rem}

  .stream{font-size:1rem}

  .stream > section{scroll-margin-top:96px}

  .foot{grid-template-columns:1fr;gap:16px;padding-top:30px}

  .foot-links{flex-direction:row;flex-wrap:wrap;gap:8px 18px}

  .foot-brand{padding-top:0}
}

@media (min-width:901px){
  .stream > section{scroll-margin-top:36px}
}

@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,
  *::before,
  *::after{animation:none !important;transition:none !important}
}

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