/* ============ Nexpia · dark tech (moonshot-inspired) ============ */
:root{
  --bg:#000000;
  --bg-2:#000000;
  --surf:#0A0A0B;
  --surf-2:#101012;
  --line:rgba(255,255,255,.09);
  --line-2:rgba(255,255,255,.18);
  --txt:#F5F5F7;
  --txt-2:#9A9AA0;
  --txt-3:#6E6E73;
  --blue:#0388FB;
  --cyan:#22F1FD;
  --blue-lt:#3D9BFF;
  --grad:linear-gradient(100deg,#22F1FD 0%,#0388FB 55%,#3D5BF6 100%);
  --wrap:1080px;
  --ease:cubic-bezier(.22,.61,.36,1);
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  background:var(--bg);color:var(--txt);
  font:400 17px/1.6 -apple-system,BlinkMacSystemFont,"SF Pro Text","SF Pro Display",
       "PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  -webkit-font-smoothing:antialiased;letter-spacing:-.01em;overflow-x:hidden;
}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
svg,img{display:block}
::selection{background:rgba(3,136,251,.35);color:#fff}
.wrap{width:min(92vw,var(--wrap));margin-inline:auto}
.mt64{margin-top:64px}
main,header,footer{position:relative;z-index:2}
::-webkit-scrollbar{width:10px;height:10px}
::-webkit-scrollbar-thumb{background:rgba(255,255,255,.16);border-radius:8px}
::-webkit-scrollbar-track{background:#000}

/* ============ GLOBAL FX ============ */
.cursor-glow{position:fixed;width:520px;height:520px;left:0;top:0;pointer-events:none;z-index:1;
  transform:translate(-50%,-50%);opacity:0;transition:opacity .5s;
  background:radial-gradient(circle,rgba(3,136,251,.13) 0%,rgba(34,241,253,.05) 38%,transparent 68%)}
.scroll-progress{position:fixed;top:0;left:0;height:2px;width:0;z-index:80;
  background:var(--grad);transition:width .1s linear}

/* ============ NAV ============ */
.nav{position:fixed;top:0;left:0;right:0;z-index:60;transition:background .35s var(--ease),border-color .35s;
  border-bottom:1px solid transparent}
.nav.is-stuck{background:rgba(0,0,0,.66);backdrop-filter:saturate(180%) blur(20px);
  -webkit-backdrop-filter:saturate(180%) blur(20px);border-bottom-color:var(--line)}
.nav__inner{width:min(94vw,1240px);margin-inline:auto;display:flex;align-items:center;gap:20px;height:60px}
.logo{display:flex;align-items:center;gap:9px}
.logo__asset{height:26px;width:auto;transition:transform .4s var(--ease)}
.logo:hover .logo__asset{transform:translateY(-1px) scale(1.04)}
.nav__links{display:flex;gap:28px;margin-left:auto}
.nav__links a{font-size:13px;color:rgba(245,245,247,.68);transition:color .2s;position:relative;padding:4px 0}
.nav__links a::after{content:"";position:absolute;left:0;right:100%;bottom:0;height:1px;background:var(--grad);
  transition:right .32s var(--ease)}
.nav__links a:hover,.nav__links a.is-active{color:#fff}
.nav__links a:hover::after,.nav__links a.is-active::after{right:0}
.nav__actions{display:flex;align-items:center;gap:16px}
.lang{font-size:12px;color:rgba(245,245,247,.68);border:1px solid var(--line-2);
  border-radius:980px;padding:3px 11px;transition:.25s var(--ease)}
.lang:hover{color:#fff;border-color:rgba(255,255,255,.5);background:rgba(255,255,255,.06)}
.nav__login{font-size:13px;color:rgba(245,245,247,.68);transition:color .2s}
.nav__login:hover{color:#fff}
.burger{display:none;flex-direction:column;gap:5px;width:32px;height:32px;align-items:center;justify-content:center}
.burger span{width:18px;height:1.5px;background:#fff;transition:.25s var(--ease)}
.burger.is-open span:nth-child(1){transform:translateY(3.2px) rotate(45deg)}
.burger.is-open span:nth-child(2){transform:translateY(-3.2px) rotate(-45deg)}

/* ============ BUTTONS ============ */
.btn{display:inline-flex;align-items:center;justify-content:center;
  border-radius:980px;font-weight:500;letter-spacing:-.01em;transition:.3s var(--ease);white-space:nowrap}
.btn--primary{background:#fff;color:#000;padding:13px 30px;font-size:16px}
.btn--primary:hover{background:#fff;transform:translateY(-2px);box-shadow:0 10px 34px -8px rgba(3,136,251,.7)}
.btn--ghost{border:1px solid var(--line-2);color:#fff;padding:12px 29px;font-size:16px}
.btn--ghost:hover{border-color:rgba(255,255,255,.55);background:rgba(255,255,255,.07);transform:translateY(-2px)}
.btn--sm{padding:6px 18px;font-size:13px;background:#fff;color:#000}
.btn--sm:hover{box-shadow:0 0 0 4px rgba(255,255,255,.12)}
.btn--full{width:100%}
.link-arrow{font-size:16px;color:var(--blue-lt);display:inline-flex;align-items:center;gap:6px}
.link-arrow::after{content:"›";font-size:19px;line-height:1;transition:transform .28s var(--ease)}
.link-arrow:hover::after{transform:translateX(4px)}

/* ============ HERO ============ */
.hero{position:relative;padding:172px 0 96px;text-align:center;overflow:hidden}
.hero__bg{position:absolute;inset:0;z-index:0;pointer-events:none}
.hero__glow{position:absolute;left:50%;top:30%;width:min(120vw,1100px);aspect-ratio:1;transform:translate(-50%,-50%) scale(var(--gs,1));
  background:radial-gradient(circle at 50% 50%,rgba(3,136,251,.30) 0%,rgba(34,241,253,.10) 32%,transparent 62%);
  filter:blur(12px);animation:breathe 9s ease-in-out infinite;transition:opacity .3s}
@keyframes breathe{0%,100%{opacity:.75;transform:translate(-50%,-50%) scale(var(--gs,1))}
  50%{opacity:1;transform:translate(-50%,-50%) scale(calc(var(--gs,1) * 1.09))}}
.hero__vignette{position:absolute;left:0;right:0;bottom:0;height:220px;
  background:linear-gradient(180deg,transparent,#000 82%)}
.marquee{position:absolute;left:0;right:0;overflow:hidden;white-space:nowrap;pointer-events:none;
  mask-image:linear-gradient(90deg,transparent,#000 14%,#000 86%,transparent);
  -webkit-mask-image:linear-gradient(90deg,transparent,#000 14%,#000 86%,transparent)}
.marquee--title{top:206px}
.marquee__track{display:inline-flex;gap:70px;animation:marq 34s linear infinite}
.marquee__track span{font-size:clamp(118px,17.6vw,244px);font-weight:600;letter-spacing:-.05em;line-height:1;
  color:transparent;-webkit-text-stroke:1px rgba(255,255,255,.13)}
@keyframes marq{from{transform:translateX(0)}to{transform:translateX(-50%)}}
.marquee--ticker{top:104px;opacity:.6}
.marquee--ticker .marquee__track{gap:46px;animation-duration:52s;animation-direction:reverse}
.marquee--ticker .marquee__track span{font:500 11.5px/1 ui-monospace,"SF Mono",Menlo,monospace;
  letter-spacing:.34em;color:rgba(255,255,255,.26);-webkit-text-stroke:0;white-space:nowrap}
.hero__inner{position:relative;z-index:1}
.pill{display:inline-block;font-size:12.5px;color:var(--txt-2);border:1px solid var(--line);
  border-radius:980px;padding:6px 15px;background:rgba(255,255,255,.03);backdrop-filter:blur(6px)}
.hero__title{margin-top:24px;font-size:clamp(42px,6.6vw,86px);font-weight:600;
  letter-spacing:-.045em;line-height:1.04;color:#fff}
.hero__title em{font-style:normal;display:block;background:var(--grad);-webkit-background-clip:text;
  background-clip:text;color:transparent}
.hero__sub{max-width:520px;margin:22px auto 0;color:var(--txt-2);font-size:16.5px;line-height:1.6}
.hero__cta{display:flex;gap:16px;justify-content:center;align-items:center;margin-top:34px;flex-wrap:wrap;position:relative;z-index:1}

/* --- 首屏视觉主体：实时交易看板 --- */
.board{position:relative;margin-top:58px;display:grid;grid-template-columns:1.02fr 1.12fr 1.02fr;
  border-radius:26px;border:1px solid var(--line);overflow:hidden;text-align:left;
  background:linear-gradient(180deg,rgba(255,255,255,.048),rgba(255,255,255,.012));
  backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
  box-shadow:0 42px 120px -62px rgba(3,136,251,.95)}
.board__edge{position:absolute;top:0;bottom:0;width:1px;background:linear-gradient(180deg,transparent,rgba(34,241,253,.35),transparent);opacity:.7}
.board__edge--l{left:0}.board__edge--r{right:0}
.board__col{padding:24px 22px;display:flex;flex-direction:column;gap:16px;min-width:0}
.board__col:first-child{border-right:1px solid var(--line)}
.board__col:last-child{border-left:1px solid var(--line)}
.board__label{display:flex;align-items:center;gap:8px;font-size:11.5px;color:var(--txt-3);letter-spacing:.06em}
.board__label b{margin-left:auto;font:600 12px/1 ui-monospace,"SF Mono",Menlo,monospace;color:var(--cyan)}
.live{width:6px;height:6px;border-radius:50%;background:var(--cyan);box-shadow:0 0 8px var(--cyan);
  animation:blink 1.7s steps(2) infinite}
.board__core{position:relative;display:flex;flex-direction:column;align-items:center;justify-content:center;
  gap:24px;padding:26px 20px}
/* 竞价流 */
.bidflow{display:flex;flex-direction:column;gap:7px;flex:1;justify-content:center}
.bidrow{display:grid;grid-template-columns:1fr 54px;gap:10px;align-items:center}
.bidrow i{height:6px;border-radius:3px;width:var(--w,30%);
  background:linear-gradient(90deg,rgba(34,241,253,.9),rgba(3,136,251,.28));
  opacity:.42;transition:width .75s var(--ease),opacity .45s var(--ease)}
.bidrow span{font:11px/1 ui-monospace,"SF Mono",Menlo,monospace;color:var(--txt-3);text-align:right}
.bidrow.is-win i{opacity:1;box-shadow:0 0 12px rgba(34,241,253,.45)}
.bidrow.is-win span{color:var(--cyan)}
.bidfoot{display:flex;align-items:baseline;gap:8px;font-size:11.5px;color:var(--txt-3);
  border-top:1px solid var(--line);padding-top:14px}
.bidfoot b{margin-left:auto;font:600 16px/1 ui-monospace,"SF Mono",Menlo,monospace;color:#fff;
  font-variant-numeric:tabular-nums}
.bidfoot b em{font-style:normal;font-size:10.5px;color:var(--txt-3);margin-left:2px}
/* Agent 决策内核 */
.orb{position:relative;width:168px;height:168px;display:grid;place-items:center;flex:none}
.orb__halo{position:absolute;inset:-28%;border-radius:50%;
  background:radial-gradient(circle,rgba(3,136,251,.34),rgba(34,241,253,.07) 44%,transparent 70%);
  animation:breathe 6.2s ease-in-out infinite}
.orb__ring{position:absolute;border-radius:50%;border:1px solid transparent}
.orb__ring--1{inset:0;border-top-color:rgba(34,241,253,.85);border-right-color:rgba(3,136,251,.35);animation:spin 7.5s linear infinite}
.orb__ring--2{inset:19px;border-bottom-color:rgba(61,155,255,.75);border-left-color:rgba(34,241,253,.28);
  animation:spin 5.2s linear infinite reverse}
.orb__ring--3{inset:38px;border-top-color:rgba(255,255,255,.26);animation:spin 3.6s linear infinite}
.orb__orbit{position:absolute;inset:0;width:100%;height:100%;animation:spin 10s linear infinite}
.orb__path{fill:none;stroke:rgba(255,255,255,.10);stroke-width:1;stroke-dasharray:3 6}
.orb__sat{fill:var(--cyan);filter:drop-shadow(0 0 7px var(--cyan))}
.orb__core{width:36px;height:36px;border-radius:50%;background:#fff;
  box-shadow:0 0 34px rgba(34,241,253,.9);animation:pulse 2.6s ease-in-out infinite}
.orb__tag{position:absolute;bottom:-4px;font:600 9.5px/1 ui-monospace,"SF Mono",Menlo,monospace;
  letter-spacing:.24em;color:var(--txt-3)}
@keyframes pulse{0%,100%{opacity:.45}50%{opacity:1}}
/* 指标 + 火花线 */
.metrics{display:grid;grid-template-columns:repeat(3,1fr);gap:9px;width:100%}
.metric{border:1px solid var(--line);border-radius:14px;padding:10px 11px 9px;background:rgba(255,255,255,.022);
  transition:border-color .3s var(--ease),background .3s var(--ease)}
.metric:hover{border-color:rgba(3,136,251,.4);background:rgba(3,136,251,.06)}
.metric .spark{width:100%;height:22px;margin-bottom:7px;overflow:visible}
.spark__base{fill:none;stroke:rgba(255,255,255,.10);stroke-width:1.3}
.spark__live{fill:none;stroke:var(--cyan);stroke-width:1.7;stroke-linecap:round;
  stroke-dasharray:96;stroke-dashoffset:96;filter:drop-shadow(0 0 5px rgba(34,241,253,.5));
  animation:spark 3.6s var(--ease) infinite}
@keyframes spark{0%{stroke-dashoffset:96}55%,100%{stroke-dashoffset:0}}
.metric b{font-size:15px;font-weight:600;letter-spacing:-.02em;color:#fff;font-variant-numeric:tabular-nums}
.metric b em{font-style:normal;font-size:10px;color:var(--txt-3);margin-left:1px}
.metric span{display:block;margin-top:2px;font-size:10.5px;color:var(--txt-3)}
/* 链路状态 */
.nodes{list-style:none;display:flex;flex-direction:column;gap:12px;justify-content:center;flex:1}
.nodes li{display:grid;grid-template-columns:38px 1fr 46px;gap:10px;align-items:center}
.nodes b{font:600 11px/1 ui-monospace,"SF Mono",Menlo,monospace;color:#fff;letter-spacing:.06em}
.nodes__bar{height:4px;border-radius:3px;background:rgba(255,255,255,.08);overflow:hidden}
.nodes__bar i{display:block;height:100%;width:var(--w,50%);
  background:linear-gradient(90deg,var(--blue),var(--cyan));transition:width .9s var(--ease)}
.nodes em{font:11px/1 ui-monospace,"SF Mono",Menlo,monospace;color:var(--txt-3);font-style:normal;text-align:right;
  font-variant-numeric:tabular-nums}

.hero__stats{display:grid;grid-template-columns:repeat(4,1fr);gap:1px;margin-top:88px;
  list-style:none;background:var(--line);border:1px solid var(--line);border-radius:20px;overflow:hidden;
  position:relative;z-index:1}
.hero__stats li{background:#000;padding:28px 20px;text-align:left;transition:background .3s;position:relative;overflow:hidden}
.hero__stats li:hover{background:#08080A}
.hero__stats li::after{content:"";position:absolute;left:0;right:0;bottom:0;height:1px;
  background:var(--grad);transform:scaleX(0);transform-origin:left;transition:transform .5s var(--ease)}
.hero__stats li:hover::after{transform:scaleX(1)}
.hero__stats b{display:block;font-size:clamp(24px,3.4vw,36px);font-weight:600;letter-spacing:-.03em;
  background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.hero__stats em{display:block;margin-top:6px;font-style:normal;font-size:13px;color:var(--txt-2)}

/* ============ SECTIONS ============ */
.sect{padding:150px 0}
.sect--alt{background:linear-gradient(180deg,#000 0%,#050507 50%,#000 100%)}
.sect__head{max-width:920px;margin-bottom:64px}
.kicker{display:block;font-size:12px;font-weight:600;letter-spacing:.1em;text-transform:uppercase;
  background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent;margin-bottom:14px}
.sect__head h2{font-size:clamp(32px,4.4vw,56px);font-weight:600;letter-spacing:-.035em;line-height:1.08;color:#fff}
.sect__head p{margin-top:20px;color:var(--txt-2);font-size:18px;letter-spacing:-.01em;max-width:760px}

/* ============ ARCHITECTURE ============ */
.arch{display:flex;flex-direction:column;gap:14px}
.arch__agent{border-radius:22px;padding:30px;text-align:center;position:relative;overflow:hidden;
  background:linear-gradient(180deg,rgba(3,136,251,.14),rgba(34,241,253,.03));
  border:1px solid rgba(3,136,251,.28)}
.arch__agent::after{content:"";position:absolute;left:-40%;top:-120%;width:60%;height:340%;
  background:linear-gradient(90deg,transparent,rgba(255,255,255,.10),transparent);transform:rotate(18deg);
  animation:sheen 6s ease-in-out infinite}
@keyframes sheen{0%,60%{left:-40%}100%{left:130%}}
.arch__tag{font-size:12px;color:var(--cyan);font-weight:600;letter-spacing:.08em;text-transform:uppercase}
.arch__agents{display:flex;flex-wrap:wrap;gap:10px;justify-content:center;margin-top:18px}
.arch__agents span{font-size:13px;padding:7px 16px;border-radius:980px;
  background:rgba(255,255,255,.07);border:1px solid var(--line);color:var(--txt);transition:.25s var(--ease)}
.arch__agents span:hover{background:rgba(3,136,251,.2);border-color:rgba(3,136,251,.5);color:#fff}
.arch__layers{display:grid;grid-template-columns:repeat(5,1fr);gap:14px}
.layer{text-align:center;padding:26px 12px 28px;border-radius:22px;background:var(--surf);border:1px solid var(--line);
  transition:.35s var(--ease);position:relative;overflow:hidden}
.layer::before{content:"";position:absolute;inset:0;opacity:0;transition:opacity .35s;
  background:radial-gradient(circle at 50% 0%,rgba(3,136,251,.28),transparent 70%)}
.layer:hover{border-color:rgba(3,136,251,.55);transform:translateY(-6px)}
.layer:hover::before{opacity:1}
.layer__ico{display:grid;place-items:center;width:40px;height:40px;margin:0 auto 14px;border-radius:13px;
  background:rgba(3,136,251,.10);border:1px solid rgba(3,136,251,.26);position:relative;
  transition:.35s var(--ease)}
.layer__ico svg{width:20px;height:20px;fill:none;stroke:var(--blue-lt);stroke-width:1.5;
  stroke-linecap:round;stroke-linejoin:round;transition:stroke .35s}
.layer:hover .layer__ico{background:rgba(34,241,253,.14);border-color:rgba(34,241,253,.45);transform:translateY(-2px)}
.layer:hover .layer__ico svg{stroke:var(--cyan)}
.layer b{display:block;font-size:20px;font-weight:600;letter-spacing:-.01em;color:#fff;position:relative}
.layer span{display:block;margin-top:9px;font-size:12.5px;color:var(--txt-2);line-height:1.5;position:relative}
.arch__layers.has-focus .layer{opacity:.34;filter:saturate(.5);transform:scale(.985)}
.arch__layers.has-focus .layer.is-focus{opacity:1;filter:none;transform:translateY(-6px);
  border-color:rgba(3,136,251,.6);box-shadow:0 20px 50px -30px rgba(3,136,251,.9)}

.grid4{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
.grid3{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.card{padding:32px 28px;border-radius:22px;background:var(--surf);border:1px solid var(--line);
  transition:.32s var(--ease);position:relative;overflow:hidden}
.card:hover{border-color:var(--line-2);background:var(--surf-2);transform:translateY(-4px)}
.card h3{font-size:18px;font-weight:600;letter-spacing:-.015em;color:#fff;position:relative}
.card p{margin-top:11px;color:var(--txt-2);font-size:14.5px;position:relative}

/* 卡片光泽扫过（所有主要卡片统一） */
.card::after,.acard::after,.sc::after,.tl__item::after,.lstep::after{content:"";position:absolute;top:0;left:-55%;
  width:45%;height:100%;pointer-events:none;
  background:linear-gradient(100deg,transparent,rgba(255,255,255,.075),transparent);
  transition:transform 1s var(--ease)}
.card:hover::after,.acard:hover::after,.sc:hover::after,.tl__item:hover::after,.lstep:hover::after{transform:translateX(360%)}

/* ============ PRODUCTS ============ */
.tabs{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:30px}
.tab{padding:9px 22px;border-radius:980px;background:var(--surf);border:1px solid var(--line);
  color:var(--txt-2);font-size:14px;font-weight:500;transition:.28s var(--ease)}
.tab:hover{color:#fff;border-color:var(--line-2)}
.tab.is-active{background:#fff;color:#000;border-color:#fff;box-shadow:0 8px 30px -12px rgba(255,255,255,.5)}
.panel{display:none;padding:46px;border-radius:26px;background:var(--surf);border:1px solid var(--line);
  position:relative;overflow:hidden}
.panel.is-active{display:grid;grid-template-columns:1.42fr .82fr;gap:38px;align-items:center;
  animation:fade .5s var(--ease)}
.panel::before{content:"";position:absolute;right:-120px;top:-120px;width:340px;height:340px;
  background:radial-gradient(circle,rgba(3,136,251,.18),transparent 68%);pointer-events:none}
@keyframes fade{from{opacity:0;transform:translateY(14px)}}
.panel h3{font-size:clamp(24px,3vw,34px);font-weight:600;letter-spacing:-.025em;color:#fff}
.panel p{margin-top:16px;color:var(--txt-2);font-size:17px;max-width:780px}
.panel__txt{min-width:0}
.chips{display:flex;flex-wrap:wrap;gap:10px;list-style:none;margin-top:28px}
.chips li{font-size:13.5px;padding:8px 17px;border-radius:980px;background:rgba(255,255,255,.05);
  border:1px solid var(--line);color:var(--txt-2);transition:.25s var(--ease)}
.chips li:hover{color:#fff;border-color:rgba(3,136,251,.5);background:rgba(3,136,251,.12)}
.evo{display:flex;gap:10px;align-items:flex-start;margin-top:26px;padding:15px 18px;border-radius:14px;
  background:linear-gradient(100deg,rgba(34,241,253,.09),rgba(3,136,251,.06) 55%,transparent);
  border:1px solid rgba(34,241,253,.22);max-width:780px}
.evo b{flex:none;font-size:12px;font-weight:600;letter-spacing:.04em;color:#22F1FD;
  padding:2px 9px;border-radius:980px;background:rgba(34,241,253,.13);border:1px solid rgba(34,241,253,.3)}
.evo span{font-size:14px;line-height:1.55;color:var(--txt-2)}
/* 产品可视化（非文字） */
.panel__viz{display:flex;flex-direction:column;gap:14px;justify-content:center}
.pv{border:1px solid var(--line);border-radius:18px;padding:18px;background:rgba(255,255,255,.02);
  display:flex;flex-direction:column;align-items:center;gap:8px;min-height:132px;justify-content:center}
.pv--gauge svg{width:112px;height:112px;transform:rotate(-90deg)}
.pv__track{fill:none;stroke:rgba(255,255,255,.08);stroke-width:9}
.pv__val{fill:none;stroke:var(--cyan);stroke-width:9;stroke-linecap:round;stroke-dasharray:302;
  filter:drop-shadow(0 0 8px rgba(34,241,253,.6));animation:pvg 2.2s var(--ease) backwards}
@keyframes pvg{from{stroke-dashoffset:302}to{stroke-dashoffset:92}}
.pv--gauge b{font-size:21px;font-weight:600;color:#fff;letter-spacing:-.02em}
.pv--gauge b em{font-style:normal;font-size:12px;color:var(--txt-3)}
.pv--gauge span{font-size:11px;color:var(--txt-3);letter-spacing:.08em}
.pv--list{gap:13px;align-items:stretch}
.pv--list i{display:block;height:9px;border-radius:6px;width:var(--w,60%);
  background:linear-gradient(90deg,rgba(34,241,253,.92),rgba(3,136,251,.22));
  animation:pvw 1.3s var(--ease) backwards}
.pv--list i:nth-child(2){animation-delay:.12s}
.pv--list i:nth-child(3){animation-delay:.24s}
.pv--list i:nth-child(4){animation-delay:.36s}
@keyframes pvw{from{width:0}}
.pv--bars{flex-direction:row;align-items:flex-end;gap:7px;height:132px;padding:18px 20px}
.pv--bars i{flex:1;border-radius:3px;height:var(--h,40%);
  background:linear-gradient(180deg,var(--cyan),rgba(3,136,251,.25));animation:vbars 2s ease-in-out infinite}
.pv--bars i:nth-child(2){animation-delay:.15s}.pv--bars i:nth-child(3){animation-delay:.3s}
.pv--bars i:nth-child(4){animation-delay:.45s}.pv--bars i:nth-child(5){animation-delay:.6s}
.pv--bars i:nth-child(6){animation-delay:.75s}.pv--bars i:nth-child(7){animation-delay:.9s}
.pv--bars i:nth-child(8){animation-delay:1.05s}.pv--bars i:nth-child(9){animation-delay:1.2s}
.pv--stack{gap:10px;align-items:stretch}
.pv--stack i{display:block;height:var(--h,40%);border-radius:10px;
  background:linear-gradient(90deg,rgba(34,241,253,.35),rgba(3,136,251,.14));
  border:1px solid rgba(34,241,253,.22)}
.pv--device{height:150px;position:relative}
.pv--device span{position:absolute;inset:14px 42px;border:1px solid rgba(255,255,255,.18);border-radius:14px}
.pv--device i{width:60%;height:7px;border-radius:5px;background:rgba(34,241,253,.6);
  animation:pvw 1.4s var(--ease) backwards}
.pv--device i:nth-of-type(2){width:44%;animation-delay:.15s;background:rgba(3,136,251,.55)}
.pv--device i:nth-of-type(3){width:70%;animation-delay:.3s;background:rgba(255,255,255,.16)}
.pv--net{height:150px}
.pv--net svg{width:100%;height:100%}
.pv--net path{fill:none;stroke:rgba(34,241,253,.35);stroke-width:1.2;stroke-dasharray:4 4;
  animation:dash 22s linear infinite}
@keyframes dash{to{stroke-dashoffset:-200}}
.pv--net circle{fill:var(--blue-lt);filter:drop-shadow(0 0 5px rgba(34,241,253,.7));
  animation:pulse 2.4s ease-in-out infinite}
.pv--net circle:nth-child(3){animation-delay:.3s}
.pv--net circle:nth-child(5){animation-delay:.6s}

/* ============ AGENTS ============ */
.tilt-grid{perspective:1200px}
.acard{padding:34px 28px;border-radius:22px;background:var(--surf);border:1px solid var(--line);
  transition:border-color .3s,box-shadow .3s;transform-style:preserve-3d;
  will-change:transform;position:relative;overflow:hidden}
.acard::before{content:"";position:absolute;inset:0;background:radial-gradient(320px circle at var(--mx,50%) var(--my,50%),
  rgba(3,136,251,.20),transparent 60%);opacity:0;transition:opacity .35s}
.acard:hover::before{opacity:1}
.acard:hover{border-color:rgba(3,136,251,.45);box-shadow:0 30px 60px -40px rgba(3,136,251,.9)}
.acard__ico{display:grid;place-items:center;width:40px;height:40px;border-radius:13px;margin-bottom:18px;
  background:rgba(3,136,251,.11);border:1px solid rgba(3,136,251,.28);position:relative;transition:.35s var(--ease)}
.acard__ico svg{width:21px;height:21px;fill:none;stroke:var(--cyan);stroke-width:1.6;
  stroke-linecap:round;stroke-linejoin:round}
.acard:hover .acard__ico{transform:translateY(-3px) scale(1.06);background:rgba(34,241,253,.15);
  border-color:rgba(34,241,253,.5)}
.acard h3{font-size:18px;font-weight:600;letter-spacing:-.015em;color:#fff;position:relative}
.acard p{margin-top:12px;color:var(--txt-2);font-size:14.5px;position:relative}

/* --- Agent 对话演示 --- */
.demo{margin-top:64px;display:grid;grid-template-columns:.7fr 1.3fr;gap:36px;align-items:center}
.demo__side h3{margin-top:12px;font-size:26px;font-weight:600;letter-spacing:-.025em;color:#fff;line-height:1.2}
.demo__side p{margin-top:14px;color:var(--txt-2);font-size:15px}
.console{text-align:left;border-radius:22px;
  background:linear-gradient(180deg,rgba(255,255,255,.055),rgba(255,255,255,.018));
  border:1px solid var(--line);backdrop-filter:blur(14px);overflow:hidden;
  box-shadow:0 30px 80px -40px rgba(3,136,251,.55);transition:border-color .35s var(--ease)}
.console:hover{border-color:rgba(3,136,251,.42)}
.console__head{display:flex;align-items:center;gap:7px;padding:13px 18px;border-bottom:1px solid var(--line)}
.console__head .dot{width:9px;height:9px;border-radius:50%;background:#3A3A3E}
.console__head .dot:nth-child(1){background:#FF5F57}
.console__head .dot:nth-child(2){background:#FEBC2E}
.console__head .dot:nth-child(3){background:#28C840}
.console__head b{margin-left:8px;font-size:12.5px;font-weight:500;color:var(--txt-3)}
.console__live{margin-left:auto;display:inline-flex;align-items:center;gap:6px;font-style:normal;
  font-size:11px;color:var(--cyan);letter-spacing:.06em}
.console__live em{width:6px;height:6px;border-radius:50%;background:var(--cyan);
  box-shadow:0 0 8px var(--cyan);animation:blink 1.8s steps(2) infinite}
.console__body{padding:20px 20px 8px;min-height:150px}
.console__say{font-size:14.5px;color:var(--txt-2)}
.console__out{margin-top:14px;min-height:170px}
/* 结构化回答卡片 */
.msg{display:flex;flex-direction:column;gap:11px;animation:fade .4s var(--ease)}
.msg__head{display:flex;align-items:center;gap:8px;font-size:12.5px;color:var(--cyan);letter-spacing:.03em}
.msg__head i{width:6px;height:6px;border-radius:50%;background:var(--cyan);box-shadow:0 0 8px var(--cyan)}
.msg__row{display:grid;grid-template-columns:58px 1fr;gap:12px;align-items:start;
  opacity:0;transform:translateY(8px);animation:msgin .5s var(--ease) forwards;
  animation-delay:calc(var(--i,0) * 130ms)}
@keyframes msgin{to{opacity:1;transform:none}}
.msg__row b{font-size:11px;font-weight:600;color:var(--txt-3);letter-spacing:.08em;
  border-left:2px solid rgba(34,241,253,.5);padding:2px 0 2px 8px}
.msg__row--a b{border-left-color:rgba(3,136,251,.75)}
.msg__row p{font-size:13.5px;line-height:1.62;color:#DCE6F2}
.msg__row p em{font-style:normal;color:#fff;background:rgba(34,241,253,.14);border-radius:5px;padding:1px 5px}
.msg__meta{font:11.5px/1.5 ui-monospace,"SF Mono",Menlo,monospace;color:var(--txt-3);
  border-top:1px dashed var(--line);padding-top:10px;opacity:0;animation:msgin .5s var(--ease) forwards;
  animation-delay:calc(var(--i,0) * 130ms)}
.console__chips{display:flex;flex-wrap:wrap;gap:7px;padding:6px 18px 18px}
.console__chips button{font-size:12px;color:var(--txt-2);border:1px solid var(--line);
  border-radius:980px;padding:6px 12px;transition:.25s var(--ease)}
.console__chips button:hover{color:#fff;border-color:rgba(3,136,251,.6);background:rgba(3,136,251,.12);
  transform:translateY(-1px)}
.console__chips button.is-on{color:#fff;border-color:rgba(34,241,253,.65);background:rgba(34,241,253,.14)}

/* ============ SCENARIOS ============ */
.spotlight{position:relative}
.sc{padding:32px 28px;border-radius:22px;background:var(--surf);border:1px solid var(--line);
  transition:.32s var(--ease);position:relative;overflow:hidden}
.sc::before{content:"";position:absolute;inset:0;opacity:0;transition:opacity .4s;
  background:radial-gradient(300px circle at var(--mx,50%) var(--my,50%),rgba(34,241,253,.14),transparent 62%)}
.sc:hover::before{opacity:1}
.sc:hover{border-color:rgba(34,241,253,.4);transform:translateY(-5px)}
.sc__viz{display:block;margin-bottom:18px;position:relative}
.sc__viz svg{width:62px;height:40px;fill:none;stroke:rgba(34,241,253,.7);stroke-width:1.5;
  stroke-linejoin:round;stroke-linecap:round;transition:.4s var(--ease)}
.sc:hover .sc__viz svg{stroke:var(--cyan);transform:translateY(-3px) scale(1.06);
  filter:drop-shadow(0 0 10px rgba(34,241,253,.45))}
.sc b{font-size:18px;font-weight:600;letter-spacing:-.015em;color:#fff;position:relative}
.sc p{margin-top:11px;color:var(--txt-2);font-size:14.5px;position:relative}

/* ============ DEVELOPERS ============ */
.dev{display:grid;grid-template-columns:1.05fr .95fr;gap:20px;align-items:start}
.code{border-radius:22px;overflow:hidden;background:#08080A;border:1px solid var(--line)}
.code__bar{display:flex;align-items:center;gap:7px;padding:14px 18px;border-bottom:1px solid var(--line)}
.code__bar span{width:10px;height:10px;border-radius:50%;background:#3A3A3E}
.code__bar span:nth-child(1){background:#FF5F57}
.code__bar span:nth-child(2){background:#FEBC2E}
.code__bar span:nth-child(3){background:#28C840}
.code__bar i{margin-left:10px;font-style:normal;font-size:12.5px;color:var(--txt-3)}
.code__copy{margin-left:auto;font-size:11.5px;color:var(--txt-2);border:1px solid var(--line);
  border-radius:980px;padding:3px 12px;transition:.25s var(--ease)}
.code__copy:hover{color:#fff;border-color:rgba(3,136,251,.55);background:rgba(3,136,251,.14)}
.code pre{padding:26px 22px;overflow-x:auto;font:13px/1.85 "SF Mono",ui-monospace,Menlo,Consolas,monospace;
  letter-spacing:0;color:#E8E8ED}
.c-cmt{color:#63636A}.c-key{color:#7FA8FF}.c-str{color:#5AC8E8}.c-num{color:#FFB86B}

.steps{list-style:none;display:flex;flex-direction:column;gap:12px}
.steps li{display:grid;grid-template-columns:36px minmax(0,1fr);gap:16px;align-items:start;
  padding:22px 24px;border-radius:20px;background:var(--surf);border:1px solid var(--line);
  transition:.3s var(--ease)}
.steps li:hover{border-color:rgba(3,136,251,.4);background:var(--surf-2);transform:translateX(4px)}
.steps li>span{width:30px;height:30px;display:grid;place-items:center;border-radius:50%;
  background:var(--grad);color:#001;font-weight:700;font-size:13.5px}
.steps b{display:block;font-size:16.5px;font-weight:600;letter-spacing:-.015em;color:#fff}
.steps p{margin-top:6px;color:var(--txt-2);font-size:14px;line-height:1.55}

/* ============ ABOUT ============ */
.tl{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;position:relative}
.tl::before{content:"";position:absolute;left:0;right:0;top:0;height:1px;background:var(--grad);opacity:.35}
.tl__item{padding:32px 28px;border-radius:22px;background:var(--surf);border:1px solid var(--line);
  transition:.32s var(--ease);position:relative;overflow:hidden}
.tl__item:hover{border-color:rgba(3,136,251,.45);transform:translateY(-5px)}
.tl__item b{font-size:15px;font-weight:600;letter-spacing:.04em;
  background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.tl__orb{display:block;position:absolute;top:-4px;right:26px;width:7px;height:7px;border-radius:50%;
  background:var(--cyan);box-shadow:0 0 12px var(--cyan);animation:pulse 2.8s ease-in-out infinite}
.tl__item p{margin-top:13px;color:var(--txt-2);font-size:14.5px}

/* ============ CONTACT ============ */
.contact{display:grid;grid-template-columns:.82fr 1.18fr;gap:20px;align-items:start}
.contact__info{display:flex;flex-direction:column;gap:28px;padding:36px;border-radius:22px;
  background:var(--surf);border:1px solid var(--line)}
.contact__info span{font-size:12px;color:var(--txt-3);letter-spacing:.05em;text-transform:uppercase}
.contact__info p{margin-top:6px;font-size:16px;color:#fff}
.form{display:grid;grid-template-columns:1fr 1fr;gap:12px;padding:36px;border-radius:22px;
  background:var(--surf);border:1px solid var(--line)}
.form input,.form textarea{padding:14px 16px;border-radius:12px;background:rgba(255,255,255,.03);
  border:1px solid var(--line);color:#fff;font:inherit;font-size:15px;transition:.25s var(--ease)}
.form .col2,.form textarea,.form button{grid-column:span 2}
.form textarea{resize:vertical}
.form input::placeholder,.form textarea::placeholder{color:#5E5E64}
.form input:focus,.form textarea:focus{outline:none;border-color:rgba(3,136,251,.8);
  background:rgba(3,136,251,.06);box-shadow:0 0 0 4px rgba(3,136,251,.14)}
.form__note{grid-column:span 2;font-size:14px;text-align:center;color:var(--cyan)}

/* ============ OUTRO ============ */
.outro{position:relative;padding:150px 0 140px;text-align:center;overflow:hidden;
  border-top:1px solid var(--line);background:#000}
.outro__bg{position:absolute;inset:0;pointer-events:none}
.outro__lines{position:absolute;left:-30%;right:-30%;bottom:-20%;height:120%;opacity:.5;
  background-image:linear-gradient(rgba(255,255,255,.055) 1px,transparent 1px),
                   linear-gradient(90deg,rgba(255,255,255,.055) 1px,transparent 1px);
  background-size:76px 76px;
  transform:perspective(560px) rotateX(62deg);
  mask-image:radial-gradient(ellipse at 50% 100%,#000 0%,transparent 66%);
  -webkit-mask-image:radial-gradient(ellipse at 50% 100%,#000 0%,transparent 66%);
  animation:outroScroll 26s linear infinite}
@keyframes outroScroll{to{background-position:0 76px,76px 0}}
.outro__glow{position:absolute;left:50%;top:6%;width:min(110vw,980px);height:520px;transform:translateX(-50%);
  background:radial-gradient(ellipse at 50% 50%,rgba(3,136,251,.26),rgba(34,241,253,.07) 42%,transparent 70%);
  filter:blur(20px);animation:breathe 9s ease-in-out infinite}
.outro__inner{position:relative;z-index:1}
.outro__mark{height:62px;width:auto;margin:0 auto 30px;filter:drop-shadow(0 0 34px rgba(3,136,251,.55))}
.outro h2{font-size:clamp(34px,5.2vw,64px);font-weight:600;letter-spacing:-.04em;line-height:1.06;color:#fff}
.outro p{margin:20px auto 0;max-width:540px;color:var(--txt-2);font-size:17px}
.outro__cta{display:flex;gap:14px;justify-content:center;flex-wrap:wrap;margin-top:38px}

/* ============ FOOTER ============ */
.ft{background:#000;border-top:1px solid var(--line);padding:72px 0 32px}
.ft__inner{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:34px}
.ft__brand .logo__asset{height:28px}
.ft__brand p{margin-top:16px;color:var(--txt-3);font-size:13.5px;max-width:300px}
.ft b{display:block;font-size:13px;font-weight:600;margin-bottom:16px;color:#fff}
.ft a,.ft__inner span{display:block;color:var(--txt-2);font-size:13.5px;margin-bottom:11px;transition:color .2s}
.ft a:hover{color:#fff}
.ft__bottom{display:flex;gap:18px;flex-wrap:wrap;align-items:center;justify-content:space-between;
  margin-top:54px;padding-top:24px;border-top:1px solid var(--line);color:var(--txt-3);font-size:12.5px}
.ft__bottom a{color:var(--txt-3)}
.ft__bottom a:hover{color:#fff}

/* ============ FOOTER · 法律条款 + SDK 下载 ============ */
.ft .ft__legal,.ft .ft__meta{display:flex;flex-wrap:wrap;align-items:center;gap:18px}
.ft .ft__meta{gap:10px}
.ft .ft__legal a,.ft .ft__meta a,.ft .ft__meta span{display:inline;margin-bottom:0;color:var(--txt-3);font-size:12.5px}
.ft .ft__legal a:hover,.ft .ft__meta a:hover{color:#fff}
.ft .ft__sdk{display:inline-flex;align-items:center;gap:7px;margin-bottom:0;color:#fff;
  border:1px solid var(--line-2);border-radius:980px;padding:8px 18px;font-size:13px;font-weight:500;
  background:linear-gradient(100deg,rgba(34,241,253,.10),rgba(3,136,251,.10));transition:.25s var(--ease)}
.ft .ft__sdk:hover{border-color:rgba(255,255,255,.55);transform:translateY(-2px);
  box-shadow:0 10px 30px -10px rgba(3,136,251,.65)}
.ft__sdk svg{width:14px;height:14px;flex:none}

/* ============ 立即咨询 · 悬浮按钮 ============ */
.floatcta{position:fixed;right:24px;bottom:24px;z-index:80;
  display:inline-flex;align-items:center;gap:8px;padding:14px 22px;border-radius:980px;
  font-size:15px;font-weight:600;color:#fff;background:var(--grad);
  box-shadow:0 12px 34px -10px rgba(3,136,251,.85);
  opacity:0;visibility:hidden;transform:translateY(14px);
  transition:opacity .35s var(--ease),transform .35s var(--ease),visibility .35s}
.floatcta.is-on{opacity:1;visibility:visible;transform:none}
.floatcta:hover{transform:translateY(-3px);box-shadow:0 16px 42px -10px rgba(34,241,253,.9)}
.floatcta svg{width:18px;height:18px;flex:none}

/* ============ 表单 · 蜜罐字段（仅对机器人可见）============ */
.form__hp{position:absolute;left:-9999px;top:-9999px;width:1px;height:1px;opacity:0;pointer-events:none}

/* ============ BOOT / 开场动画 ============ */
body.is-booting{overflow:hidden}
.boot{position:fixed;inset:0;z-index:200;background:#000;display:grid;place-items:center}
.boot.is-done{background:transparent}
.boot__grid{position:absolute;inset:0;z-index:2;opacity:.6;transition:opacity .35s;
  background-image:linear-gradient(rgba(255,255,255,.05) 1px,transparent 1px),
                   linear-gradient(90deg,rgba(255,255,255,.05) 1px,transparent 1px);
  background-size:58px 58px;
  mask-image:radial-gradient(ellipse at 50% 45%,#000 0%,transparent 72%);
  -webkit-mask-image:radial-gradient(ellipse at 50% 45%,#000 0%,transparent 72%)}
.boot__scan{position:absolute;left:0;right:0;z-index:2;height:1px;top:-2px;transition:opacity .3s;
  background:linear-gradient(90deg,transparent,rgba(34,241,253,.75),rgba(3,136,251,.5),transparent);
  box-shadow:0 0 26px 5px rgba(3,136,251,.28);
  animation:bootscan 2.4s cubic-bezier(.45,0,.55,1) infinite}
@keyframes bootscan{0%{transform:translateY(0);opacity:0}
  12%{opacity:1}88%{opacity:1}100%{transform:translateY(100vh);opacity:0}}
.boot__core{position:relative;z-index:3;width:min(86vw,460px);text-align:center;transition:opacity .3s}
.boot.is-done .boot__core,.boot.is-done .boot__grid,.boot.is-done .boot__scan{opacity:0}
.boot__mark{position:relative;height:42px;display:grid;place-items:center}
.boot__mark::before{content:"";position:absolute;width:120px;height:6px;border-radius:6px;
  background:rgba(255,255,255,.06);animation:pulse 1.4s ease-in-out infinite}
.boot__mark img{position:relative;height:42px;margin:0 auto;opacity:0;clip-path:inset(0 100% 0 0);
  animation:markIn 1s var(--ease) .1s forwards;
  filter:drop-shadow(0 0 26px rgba(3,136,251,.6))}
@keyframes markIn{to{clip-path:inset(0 0 0 0);opacity:1}}
.boot__meter{margin-top:34px;height:3px;background:rgba(255,255,255,.13);border-radius:3px;overflow:hidden}
.boot__meter i{display:block;height:100%;width:0;background:var(--grad);
  box-shadow:0 0 16px rgba(34,241,253,.9)}
.boot__meta{margin-top:20px;display:flex;align-items:baseline;justify-content:center;gap:14px}
.boot__pct b{font-size:34px;font-weight:600;letter-spacing:-.03em;color:#fff;
  font-variant-numeric:tabular-nums;text-shadow:0 0 26px rgba(3,136,251,.5)}
.boot__pct em{font-style:normal;font-size:14px;color:var(--txt-2);margin-left:3px}
.boot__task{font:12.5px/1.45 ui-monospace,"SF Mono",Menlo,monospace;color:#C9C9CF;
  letter-spacing:.02em;text-align:left;max-width:236px}
.boot__log{margin-top:30px;list-style:none;text-align:left;
  font:12px/2.05 ui-monospace,"SF Mono",Menlo,monospace;color:#8E8E95}
.boot__log li{opacity:0;transform:translateX(-6px);animation:logIn .45s var(--ease) forwards}
.boot__log li b{color:var(--cyan);font-weight:500;margin-right:8px}
@keyframes logIn{to{opacity:1;transform:none}}
.boot__curtain{position:absolute;inset:0;z-index:1;display:flex;pointer-events:none}
.boot__curtain i{flex:1;background:#000;transform:translateY(0);
  transition:transform .78s var(--ease);transition-delay:calc(var(--k,0) * 65ms);
  box-shadow:0 -1px 0 rgba(34,241,253,.22)}
.boot.is-done .boot__curtain i{transform:translateY(-101%)}
.boot__curtain i:nth-child(1){--k:0}.boot__curtain i:nth-child(2){--k:1}
.boot__curtain i:nth-child(3){--k:2}.boot__curtain i:nth-child(4){--k:3}
.boot__curtain i:nth-child(5){--k:4}

/* ============ BG GRID ============ */
.bg-grid{position:fixed;inset:-30% 0;z-index:0;pointer-events:none;opacity:.5;
  background-image:linear-gradient(rgba(255,255,255,.028) 1px,transparent 1px),
                   linear-gradient(90deg,rgba(255,255,255,.028) 1px,transparent 1px);
  background-size:64px 64px;transform:translateY(var(--gy,0px));
  mask-image:radial-gradient(ellipse at 50% 25%,#000 0%,transparent 76%);
  -webkit-mask-image:radial-gradient(ellipse at 50% 25%,#000 0%,transparent 76%)}

/* ============ SCROLL HINT ============ */
.scroll-hint{position:absolute;left:50%;bottom:30px;transform:translateX(-50%);
  width:22px;height:34px;border:1px solid rgba(255,255,255,.22);border-radius:12px;z-index:3}
.scroll-hint i{position:absolute;left:50%;top:7px;width:3px;height:6px;border-radius:2px;
  background:var(--cyan);box-shadow:0 0 8px rgba(34,241,253,.9);animation:mouse 1.9s ease-in-out infinite}
@keyframes mouse{0%{opacity:0;transform:translate(-50%,0)}
  25%{opacity:1}65%{opacity:1;transform:translate(-50%,11px)}
  100%{opacity:0;transform:translate(-50%,16px)}}

/* ============ ARCH LINK ============ */
.arch__link{height:30px;display:grid;place-items:center;position:relative;overflow:hidden}
.arch__link i{display:block;width:1px;height:0;transition:height .8s var(--ease);
  background:linear-gradient(180deg,rgba(34,241,253,.85),rgba(3,136,251,.15))}
.arch__link.is-in i{height:30px}
.arch__link::after{content:"";position:absolute;top:0;left:50%;width:5px;height:5px;border-radius:50%;
  background:var(--cyan);box-shadow:0 0 12px var(--cyan);opacity:0;transform:translateX(-50%)}
.arch__link.is-in::after{animation:linkdot 2.4s ease-in-out .6s infinite}
@keyframes linkdot{0%{opacity:0;top:-4px}20%{opacity:1}
  80%{opacity:1}100%{opacity:0;top:30px}}

/* ============ HORIZONTAL SCROLL / 自进化闭环 ============ */
.hscroll{height:320vh;position:relative}
.hscroll__stage{position:sticky;top:0;height:100vh;display:flex;align-items:center;overflow:hidden}
.hscroll__track{display:flex;gap:22px;padding-inline:max(6vw,calc((100vw - var(--wrap)) / 2));
  will-change:transform}
.lstep{flex:0 0 min(392px,78vw);padding:38px 34px 34px;border-radius:24px;background:var(--surf);
  border:1px solid var(--line);display:flex;flex-direction:column;overflow:hidden;
  transition:border-color .45s var(--ease),box-shadow .45s var(--ease),background .45s var(--ease)}
.lstep.is-on{border-color:rgba(34,241,253,.42);background:#0C0C10;
  box-shadow:0 26px 64px -46px rgba(3,136,251,.9)}
.lstep__n{display:block;font:600 12.5px/1 ui-monospace,"SF Mono",Menlo,monospace;
  color:var(--cyan);letter-spacing:.24em}
.lstep h3{margin-top:16px;font-size:23px;font-weight:600;letter-spacing:-.022em;color:#fff}
.lstep p{margin-top:12px;margin-bottom:26px;color:var(--txt-2);font-size:14.5px;line-height:1.62}
.lstep .viz{margin-top:auto}
.loop__foot{margin-top:30px;display:flex;align-items:center;gap:20px}
.hscroll__bar{flex:1;height:2px;background:rgba(255,255,255,.1);border-radius:2px;overflow:hidden}
.hscroll__bar i{display:block;height:100%;width:0;background:var(--grad);
  box-shadow:0 0 10px rgba(34,241,253,.6)}
.loop__hint{font-size:12px;color:var(--txt-3);white-space:nowrap;letter-spacing:.06em}

/* --- mini visualisations --- */
.viz{margin-top:28px;height:92px;border-radius:14px;background:rgba(255,255,255,.022);
  border:1px solid var(--line);display:flex;align-items:flex-end;justify-content:center;
  gap:6px;padding:16px 18px;overflow:hidden;position:relative}
.viz--bars i{flex:1;max-width:22px;border-radius:2px;height:18%;opacity:.9;
  background:linear-gradient(180deg,var(--cyan),var(--blue));animation:vbars 1.7s ease-in-out infinite}
.viz--bars i:nth-child(2){animation-delay:.13s}.viz--bars i:nth-child(3){animation-delay:.26s}
.viz--bars i:nth-child(4){animation-delay:.39s}.viz--bars i:nth-child(5){animation-delay:.52s}
.viz--bars i:nth-child(6){animation-delay:.65s}.viz--bars i:nth-child(7){animation-delay:.78s}
.viz--bars i:nth-child(8){animation-delay:.91s}
@keyframes vbars{0%,100%{height:16%}50%{height:86%}}
.viz--flow{align-items:center}
.viz--flow i{position:absolute;top:50%;left:-70px;width:70px;height:2px;border-radius:2px;
  background:linear-gradient(90deg,transparent,rgba(34,241,253,.95));animation:vflow 2.6s linear infinite}
.viz--flow i:nth-child(2){animation-delay:.85s}
.viz--flow i:nth-child(3){animation-delay:1.7s}
@keyframes vflow{to{transform:translateX(430px)}}
.viz--curve{align-items:center;padding:0}
.viz--curve svg{width:100%;height:100%}
.viz__base{fill:none;stroke:rgba(255,255,255,.12);stroke-width:2}
.viz__live{fill:none;stroke:var(--cyan);stroke-width:2.5;stroke-linecap:round;
  stroke-dasharray:420;stroke-dashoffset:420;filter:drop-shadow(0 0 6px rgba(34,241,253,.55));
  animation:vcurve 3.4s ease-in-out infinite}
@keyframes vcurve{0%{stroke-dashoffset:420}60%,100%{stroke-dashoffset:0}}
.viz--ring{align-items:center}
.viz--ring i{position:absolute;width:64px;height:64px;border-radius:50%;border:1px solid transparent;
  border-top-color:var(--cyan);border-right-color:rgba(3,136,251,.55);animation:spin 3.2s linear infinite}
.viz--ring i:nth-child(2){width:42px;height:42px;animation-duration:2.1s;animation-direction:reverse;
  border-top-color:var(--blue-lt);border-right-color:rgba(34,241,253,.35)}
.viz--ring b{font-size:24px;font-weight:400;color:#fff;line-height:1}
@keyframes spin{to{transform:rotate(360deg)}}

/* ============ REVEAL（多种载入形态） ============ */
/* 用 keyframes + backwards 而非 transition：动画结束后不占用 transform，
   卡片自身的 hover 过渡才能正常生效。
   注意：reveal 初始态不要用 clip-path / mask —— IntersectionObserver 会把被裁剪的元素
   判定为不可见（intersectionRatio = 0），is-in 将永远不触发。 */
.reveal{opacity:0}
.reveal.is-in{opacity:1;animation-duration:.95s;animation-timing-function:var(--ease);
  animation-delay:var(--d,0ms);animation-fill-mode:backwards}
.reveal.rv-up.is-in{animation-name:rvUp}
.reveal.rv-left.is-in{animation-name:rvLeft}
.reveal.rv-right.is-in{animation-name:rvRight}
.reveal.rv-zoom.is-in{animation-name:rvZoom}
.reveal.rv-sweep.is-in{animation-name:rvSweep}
.reveal.rv-flip.is-in{animation-name:rvFlip}
@keyframes rvUp{from{opacity:0;transform:translateY(30px)}}
@keyframes rvLeft{from{opacity:0;transform:translateX(-52px) translateY(12px)}}
@keyframes rvRight{from{opacity:0;transform:translateX(52px) translateY(12px)}}
@keyframes rvZoom{from{opacity:0;transform:scale(.93);filter:blur(7px)}
  to{opacity:1;filter:blur(0)}}
@keyframes rvSweep{from{opacity:0;transform:translateX(-64px) scale(.96);filter:blur(6px)}
  to{opacity:1;filter:blur(0)}}
@keyframes rvFlip{from{opacity:0;transform:perspective(1100px) rotateX(-17deg) translateY(26px)}}

/* 标题逐字/逐行揭示 */
.ch{display:inline-block;opacity:0;transform:translateY(.5em);
  transition:opacity .55s var(--ease),transform .7s var(--ease);
  transition-delay:calc(var(--i,0) * 24ms + var(--d,0ms))}
.reveal.is-in .ch{opacity:1;transform:none}
.rv-line{display:block;opacity:0;transform:translateY(34px);
  transition:opacity .8s var(--ease),transform .9s var(--ease);
  transition-delay:calc(var(--i,0) * 110ms)}
.reveal.is-in .rv-line{opacity:1;transform:none}

/* ============ RESPONSIVE ============ */
@media (max-width:1068px){
  .nav__links{gap:20px}
  .grid4,.grid3{grid-template-columns:repeat(2,1fr)}
  .arch__layers{grid-template-columns:repeat(3,1fr)}
  .dev,.contact{grid-template-columns:1fr}
  .ft__inner{grid-template-columns:1fr 1fr}
  .cursor-glow{display:none}
  .hscroll{height:auto}
  .hscroll__stage{position:static;height:auto;overflow:visible;display:block}
  .hscroll__track{flex-direction:column;padding:0;width:min(88vw,var(--wrap));margin-inline:auto;
    transform:none!important}
  .lstep{flex:none;width:100%}
  .hscroll__bar{display:none}
  .loop__hint{display:none}
  .board{grid-template-columns:1fr 1fr;grid-template-areas:"bid core" "nodes nodes"}
  .board__col:first-child{grid-area:bid;border-right:1px solid var(--line);border-bottom:1px solid var(--line)}
  .board__core{grid-area:core;border-bottom:1px solid var(--line)}
  .board__col:last-child{grid-area:nodes;border-left:0}
  .nodes{flex-direction:row;flex-wrap:wrap;gap:14px 22px}
  .nodes li{flex:1 1 130px;grid-template-columns:38px 1fr 42px}
  .panel.is-active{grid-template-columns:1fr;gap:28px}
  .panel__viz{flex-direction:row;flex-wrap:wrap}
  .pv{flex:1 1 180px;min-height:120px}
  .demo{grid-template-columns:1fr;gap:24px}
}
@media (max-width:760px){
  .nav__inner{gap:10px;height:56px}
  .logo{gap:7px}
  .logo__asset{height:21px}
  .nav__actions{gap:10px}
  .nav__login{white-space:nowrap;font-size:12.5px}
  .btn--sm{padding:6px 13px;font-size:12.5px}
  .lang{padding:3px 9px}
  .nav__links{top:56px;position:fixed;left:0;right:0;flex-direction:column;gap:0;
    background:rgba(0,0,0,.97);backdrop-filter:blur(20px);border-bottom:1px solid var(--line);
    max-height:0;overflow:hidden;transition:.4s var(--ease)}
  .nav__links.is-open{max-height:400px}
  .nav__links a{padding:17px 5vw;border-bottom:1px solid var(--line);font-size:15px;color:#fff}
  .nav__links a::after{display:none}
  .burger{display:flex}
  .hero{padding:120px 0 74px}
  .marquee--title{top:150px}
  .marquee__track span{font-size:clamp(74px,20vw,120px)}
  .marquee--ticker{display:none}
  .hero__sub{font-size:15.5px}
  .board{margin-top:40px;grid-template-columns:1fr;
    grid-template-areas:"core" "bid" "nodes"}
  .board__col:first-child{border-right:0;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
  .board__core{border-bottom:0;padding:22px 18px}
  .board__col:last-child{border-left:0;border-top:1px solid var(--line)}
  .orb{width:140px;height:140px}
  .hero__stats{grid-template-columns:1fr 1fr;margin-top:60px}
  .grid4,.grid3,.tl,.arch__layers,.ft__inner{grid-template-columns:1fr}
  .form input,.form textarea,.form button{grid-column:span 2}
  .panel{padding:30px 24px}
  .panel__viz{flex-direction:column}
  .sect{padding:96px 0}
  .sect__head{margin-bottom:44px}
  .outro{padding:110px 0 100px}
  .outro__mark{height:52px}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none!important;transition:none!important}
  .reveal,.ch,.rv-line{opacity:1;transform:none}
  .marquee__track{animation:none}
  .hscroll{height:auto}
  .hscroll__stage{position:static;height:auto;overflow:visible;display:block}
  .hscroll__track{flex-direction:column;transform:none!important;padding:0}
  .lstep{flex:none}
  .viz__live,.spark__live{stroke-dashoffset:0}
  .msg__row,.msg__meta{opacity:1;transform:none}
  .pv__val{stroke-dashoffset:92}
  .pv--list i,.pv--device i{width:var(--w,60%)}
}