:root{
  --ink:#eef3ff;
  --ink-muted:#9ca9bd;
  --night:#07101d;
  --night-deep:#030914;
  --panel:#0c1728;
  --line:#263248;
  --line-soft:#172337;
  --signal:#8fb4ff;
  --signal-strong:#c7d8ff;
  --paper:#f3f5f8;
  --paper-ink:#0b1422;
  --font:"Avenir Next","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  --font-condensed:"Arial Narrow","Avenir Next Condensed","PingFang SC",sans-serif;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth;background:var(--night-deep)}
body{margin:0;background:var(--night);color:var(--ink);font-family:var(--font);font-size:16px;line-height:1.6}
a{color:inherit}
svg{display:block}
::selection{background:var(--signal);color:var(--night-deep)}
:focus-visible{outline:3px solid var(--signal);outline-offset:4px}
.skip-link{position:fixed;z-index:100;top:-60px;left:20px;padding:10px 14px;background:var(--paper);color:var(--paper-ink);text-decoration:none}
.skip-link:focus{top:16px}

.site-header{position:sticky;z-index:30;top:0;min-height:78px;display:grid;grid-template-columns:minmax(240px,1fr) auto minmax(240px,1fr);align-items:center;padding:0 clamp(22px,4vw,64px);border-bottom:1px solid rgb(143 180 255 / 18%);background:rgb(7 16 29 / 92%);backdrop-filter:blur(16px) saturate(130%)}
.wordmark{justify-self:start;display:flex;align-items:center;gap:12px;text-decoration:none}
.wordmark span{display:grid;line-height:1.12}
.wordmark strong{font-size:15px;letter-spacing:.08em}
.wordmark small{margin-top:3px;color:var(--ink-muted);font-size:9px;letter-spacing:.17em}
.site-nav{display:flex;align-items:center;gap:36px}
.site-nav a{position:relative;color:var(--ink-muted);font-size:13px;text-decoration:none}
.site-nav a::after{content:"";position:absolute;right:0;bottom:-9px;left:0;height:1px;background:var(--signal);transform:scaleX(0);transform-origin:left;transition:transform .25s cubic-bezier(.16,1,.3,1)}
.site-nav a:hover{color:var(--ink)}
.site-nav a:hover::after{transform:scaleX(1)}
.header-entry{justify-self:end;display:flex;align-items:center;gap:12px;color:var(--ink);font-size:13px;font-weight:700;text-decoration:none}
.header-entry svg{width:20px;height:20px;fill:none;stroke:currentColor;stroke-width:1.5;transition:transform .25s cubic-bezier(.16,1,.3,1)}
.header-entry:hover svg{transform:translateX(5px)}

.hero{min-height:calc(100vh - 78px);display:grid;grid-template-columns:minmax(0,.88fr) minmax(520px,1.12fr);align-items:stretch;border-bottom:1px solid var(--line)}
.hero-copy{display:flex;flex-direction:column;justify-content:center;padding:clamp(72px,9vw,132px) clamp(30px,6vw,92px);border-right:1px solid var(--line)}
.hero-brand{width:min(250px,62%);height:82px;object-fit:contain;object-position:left center;margin-bottom:34px}
.hero h1{max-width:760px;margin:0;font-family:var(--font-condensed);font-size:clamp(52px,5vw,82px);font-weight:700;letter-spacing:-.035em;line-height:.98}
.hero h1 span{display:block;white-space:nowrap}.hero h1 span:last-child{color:var(--signal)}
.hero-copy>p{max-width:590px;margin:36px 0 0;color:var(--ink-muted);font-size:clamp(17px,1.3vw,21px);line-height:1.75}
.hero-actions{display:flex;align-items:center;gap:28px;margin-top:46px}
.primary-action{min-height:58px;display:inline-flex;align-items:center;gap:30px;padding:0 22px 0 24px;background:var(--signal);color:var(--night-deep);font-weight:750;text-decoration:none;transition:background .2s ease,color .2s ease}
.primary-action:hover{background:var(--signal-strong)}
.primary-action svg{width:23px;height:23px;fill:none;stroke:currentColor;stroke-width:1.8;transition:transform .25s cubic-bezier(.16,1,.3,1)}
.primary-action:hover svg{transform:translateX(5px)}
.text-action{color:var(--ink-muted);font-size:14px;text-underline-offset:6px}
.text-action:hover{color:var(--ink)}

.protocol-stage{min-width:0;display:grid;grid-template-rows:auto 1fr auto;background:var(--night-deep);overflow:hidden}
.stage-head,.stage-foot{display:flex;align-items:center;justify-content:space-between;gap:20px;padding:20px 28px;color:var(--ink-muted);font-family:var(--font-condensed);font-size:11px;letter-spacing:.12em}
.stage-head{border-bottom:1px solid var(--line-soft)}
.stage-foot{border-top:1px solid var(--line-soft)}
.stage-status{display:flex;align-items:center;gap:8px}
.stage-status i{width:7px;height:7px;border-radius:50%;background:var(--signal);box-shadow:0 0 0 5px rgb(143 180 255 / 10%)}
.protocol-flow{display:grid;grid-template-columns:minmax(180px,.75fr) minmax(110px,.5fr) minmax(230px,1fr);align-items:center;padding:clamp(36px,5vw,76px)}
.protocol-node{border:1px solid var(--line);background:var(--panel);padding:22px}
.protocol-node small{display:block;color:var(--ink-muted);font-family:var(--font-condensed);font-size:9px;letter-spacing:.15em}
.protocol-node strong{display:block;margin-top:20px;font-size:24px;letter-spacing:-.025em}
.protocol-node span{display:block;margin-top:6px;color:var(--ink-muted);font-size:12px}
.platform-node{position:relative;min-height:184px;display:flex;flex-direction:column;justify-content:flex-end;border-color:var(--signal)}
.platform-node::before{content:"";position:absolute;top:-1px;right:-1px;width:42px;height:42px;border-top:1px solid var(--signal);border-right:1px solid var(--signal);background:linear-gradient(135deg,transparent 48%,var(--signal) 49%,var(--signal) 51%,transparent 52%)}
.protocol-link{min-width:0;color:var(--signal);text-align:center}
.protocol-link span{display:block;margin-bottom:8px;font-size:10px;letter-spacing:.12em}
.protocol-link svg{width:100%;height:40px;fill:none;stroke:currentColor;stroke-width:1}
.agent-stack{display:grid;gap:10px}
.agent-node{padding:16px 18px}
.agent-node strong{margin-top:8px;font-size:17px}
.agent-node.featured{border-color:#5877ad;background:#101f36}
.agent-node.muted{opacity:.7}

.product-entry{min-height:360px;display:grid;grid-template-columns:clamp(90px,10vw,150px) minmax(320px,.8fr) minmax(420px,1.2fr);align-items:stretch;background:var(--signal);color:var(--night-deep)}
.product-index{display:grid;place-items:center;border-right:1px solid rgb(3 9 20 / 24%);font-family:var(--font-condensed);font-size:clamp(78px,10vw,158px);font-weight:800;line-height:1}
.product-index img{width:82%;height:120px;object-fit:contain;border-radius:4px}
.product-copy{align-self:center;padding:56px clamp(28px,5vw,76px)}
.product-copy h2{margin:0;font-size:clamp(34px,4vw,64px);letter-spacing:-.035em;line-height:1.05}
.product-copy p{max-width:780px;margin:26px 0 0;font-size:clamp(16px,1.35vw,20px);line-height:1.75}
.product-inline-link{display:inline-flex;align-items:center;gap:18px;margin-top:30px;padding-bottom:5px;border-bottom:1px solid currentColor;font-weight:800;text-decoration:none}
.product-inline-link span{transition:transform .2s ease}.product-inline-link:hover span{transform:translateX(5px)}
.product-proof{align-self:center;margin:42px 54px 42px 0;border:1px solid rgb(3 9 20 / 42%);background:var(--paper);color:var(--paper-ink);box-shadow:12px 12px 0 rgb(3 9 20 / 16%)}
.product-proof>header{display:flex;align-items:center;justify-content:space-between;padding:14px 16px;border-bottom:1px solid #b7c0cc}.product-proof>header span{font-size:11px}
.proof-layout{display:grid;grid-template-columns:130px minmax(0,1fr);min-height:190px}.proof-layout nav{display:grid;align-content:start;gap:15px;padding:18px 14px;border-right:1px solid #b7c0cc;font-size:12px}.proof-layout nav span{color:#526071}
.proof-task{display:grid;align-content:center;padding:22px}.proof-task small{color:#526071}.proof-task strong{margin-top:5px;font-size:24px}.proof-task p{margin:6px 0 16px;color:#526071;font-size:12px}.proof-task div{height:4px;background:#d3d9e2}.proof-task i{display:block;width:82%;height:100%;background:#3265d4}.proof-task>span{margin-top:14px;color:#164fae;font-size:12px;font-weight:800}
.product-link{display:flex;flex-direction:column;justify-content:space-between;padding:50px 44px;border-left:1px solid rgb(3 9 20 / 24%);font-size:18px;font-weight:750;text-decoration:none;transition:background .2s ease}
.product-link:hover{background:rgb(255 255 255 / 22%)}
.product-link svg{align-self:flex-end;width:58px;height:58px;fill:none;stroke:currentColor;stroke-width:1.2;transition:transform .3s cubic-bezier(.16,1,.3,1)}
.product-link:hover svg{transform:translateX(8px)}

.method{display:grid;grid-template-columns:minmax(280px,.8fr) minmax(0,1.2fr);gap:clamp(50px,8vw,130px);padding:clamp(88px,11vw,168px) clamp(24px,6vw,92px);background:var(--paper);color:var(--paper-ink)}
.section-intro{position:sticky;top:120px;align-self:start}
.section-intro h2{max-width:560px;margin:0;font-size:clamp(38px,5vw,76px);letter-spacing:-.04em;line-height:1.05}
.section-intro p{max-width:540px;margin:30px 0 0;color:#4e5a69;font-size:18px;line-height:1.8}
.method-list{margin:0;padding:0;border-top:1px solid #aab2be;list-style:none}
.method-list li{display:grid;grid-template-columns:54px minmax(0,1fr) 150px;gap:24px;align-items:start;padding:34px 0;border-bottom:1px solid #aab2be}
.method-no{font-family:var(--font-condensed);font-size:13px;font-variant-numeric:tabular-nums}
.method-list h3{margin:0;font-size:24px;letter-spacing:-.025em}
.method-list p{max-width:600px;margin:10px 0 0;color:#526071}
.method-owner{justify-self:end;color:#526071;font-size:12px;text-align:right}

.about{display:grid;grid-template-columns:minmax(0,1.15fr) minmax(300px,.55fr);gap:80px;padding:clamp(80px,10vw,148px) clamp(24px,6vw,92px);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.about h2{max-width:870px;margin:0;font-size:clamp(42px,6vw,88px);letter-spacing:-.04em;line-height:1.04}
.about>div>p{max-width:720px;margin:30px 0 0;color:var(--ink-muted);font-size:18px}
.about-note{align-self:end;padding-top:22px;border-top:1px solid var(--line)}
.about-note span{color:var(--ink-muted);font-size:12px;letter-spacing:.12em}
.about-note strong{display:block;margin-top:18px;font-size:22px}
.about-note p{margin:10px 0 0!important;font-size:14px!important}
.brand-partners{grid-column:1/-1;display:flex;align-items:center;gap:28px;padding-top:28px;border-top:1px solid var(--line)}
.brand-partners figure{display:flex;align-items:center;gap:14px;margin:0;color:var(--ink-muted);font-size:12px}
.brand-partners img{width:72px;height:52px;object-fit:contain;background:var(--night-deep)}
.brand-partners figure:last-child img{width:52px;height:52px}

.closing{min-height:430px;display:grid;grid-template-columns:minmax(0,1fr) auto;align-items:end;gap:50px;padding:clamp(70px,9vw,130px) clamp(24px,6vw,92px);background:var(--night-deep)}
.closing h2{max-width:920px;margin:0;font-size:clamp(44px,6vw,92px);letter-spacing:-.04em;line-height:1.02}
.closing-action{min-width:280px;display:flex;align-items:center;justify-content:space-between;gap:36px;padding:24px 0;border-top:1px solid var(--signal);border-bottom:1px solid var(--signal);color:var(--signal-strong);font-weight:750;text-decoration:none}
.closing-action svg{width:46px;height:46px;fill:none;stroke:currentColor;stroke-width:1.1;transition:transform .3s cubic-bezier(.16,1,.3,1)}
.closing-action:hover svg{transform:translateX(8px)}

.site-footer{display:grid;grid-template-columns:1fr auto;gap:32px;padding:42px clamp(24px,6vw,92px);border-top:1px solid var(--line);color:var(--ink-muted);font-size:12px}
.footer-brand{display:flex;align-items:baseline;gap:18px}
.footer-brand strong{color:var(--ink);font-size:14px}
.footer-links{display:flex;gap:28px}
.footer-links a{text-underline-offset:5px}
.site-footer p{grid-column:1/-1;margin:14px 0 0}

@media(max-width:1050px){
  .site-header{grid-template-columns:1fr auto}.site-nav{display:none}
  .hero{grid-template-columns:1fr}.hero-copy{min-height:670px;border-right:0;border-bottom:1px solid var(--line)}
  .protocol-stage{min-height:620px}.product-entry{grid-template-columns:100px 1fr}.product-proof{grid-column:1/-1;margin:0 44px 44px 100px}
  .method{grid-template-columns:1fr}.section-intro{position:static}.about{grid-template-columns:1fr}.closing{grid-template-columns:1fr}.closing-action{max-width:420px}
}
@media(max-width:680px){
  .hero-brand{width:min(210px,70%);height:68px;margin-bottom:28px}
  .brand-partners{align-items:flex-start;flex-direction:column}
  .site-header{min-height:68px;padding:0 18px}.wordmark small{display:none}.header-entry span{font-size:0}.header-entry span::after{content:"Demo";font-size:13px}.hero{min-height:auto}.hero-copy{min-height:600px;padding:82px 22px 64px}.hero h1{font-size:clamp(42px,12vw,52px)}.hero-copy>p{margin-top:28px;font-size:16px}.hero-actions{align-items:flex-start;flex-direction:column;margin-top:36px}.primary-action{width:100%;justify-content:space-between}.protocol-stage{min-height:auto}.stage-head,.stage-foot{padding:16px 18px}.stage-foot{align-items:flex-start;flex-direction:column}.protocol-flow{grid-template-columns:1fr;padding:36px 22px}.protocol-link{height:100px;display:grid;place-items:center}.protocol-link span{margin:0}.protocol-link svg{width:90px;transform:rotate(90deg)}
  .product-entry{grid-template-columns:74px 1fr}.product-index{font-size:64px}.product-copy{padding:42px 22px}.product-copy h2{font-size:36px}.product-copy p{font-size:15px}.product-link{padding:30px 22px;min-height:120px}.product-link svg{width:44px;height:44px}
  .method{padding:82px 22px}.section-intro h2{font-size:44px}.section-intro p{font-size:16px}.method-list li{grid-template-columns:38px minmax(0,1fr);gap:16px;padding:28px 0}.method-owner{grid-column:2;justify-self:start;text-align:left}.method-list h3{font-size:21px}
  .about{padding:82px 22px;gap:60px}.about h2{font-size:44px}.about>div>p{font-size:16px}.closing{min-height:480px;padding:80px 22px}.closing h2{font-size:48px}.closing-action{min-width:0;width:100%}.site-footer{grid-template-columns:1fr;padding:38px 22px}.footer-brand{align-items:flex-start;flex-direction:column;gap:4px}.footer-links{justify-content:space-between}.site-footer p{grid-column:1}
}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*::before,*::after{transition-duration:.01ms!important;animation-duration:.01ms!important;animation-iteration-count:1!important}}

/* Taste pass: clearer hierarchy, one CTA language, resilient mobile composition */
.primary-action,.header-entry,.product-link,.closing-action{white-space:nowrap}
.protocol-node{box-shadow:none}
.agent-node.muted{border-style:dashed;background:transparent}
.product-entry{min-height:320px}
.method-list li{transition:background-color .18s ease,padding-inline .18s ease}
.method-list li:hover{padding-inline:14px;background:#e9eef6}
.about-note span{letter-spacing:.06em}

@media(max-width:680px){
  .site-header{grid-template-columns:minmax(0,1fr) auto}
  .wordmark{min-width:0}.wordmark strong{white-space:nowrap}
  .header-entry{gap:7px}.header-entry span{font-size:0}.header-entry span::after{content:"进入";font-size:13px}
  .hero-copy{min-width:0;min-height:auto;padding:64px 22px 58px}
  .hero h1{max-width:100%;font-size:clamp(40px,11.5vw,48px);line-height:1.03}
  .hero h1 span{white-space:normal;overflow-wrap:anywhere}
  .hero-copy>p{max-width:20em;margin-top:24px;line-height:1.7}
  .hero-actions{width:100%;gap:22px;margin-top:32px}
  .primary-action{width:100%;min-width:0;gap:18px;padding-inline:20px}
  .protocol-stage{min-height:auto}
  .stage-head{font-size:10px;letter-spacing:.08em}
  .stage-head .stage-status{display:none}
  .protocol-flow{grid-template-columns:1fr;gap:0;padding:30px 22px}
  .protocol-node{min-width:0}.platform-node{min-height:138px}
  .protocol-link{height:82px}.protocol-link svg{width:70px}
  .agent-stack{grid-template-columns:1fr 1fr;gap:8px}
  .agent-node{min-width:0;padding:14px}.agent-node strong{font-size:15px}.agent-node span{font-size:11px}
  .agent-node.muted{display:none}
  .stage-foot{display:grid;grid-template-columns:1fr 1fr;gap:10px;font-size:10px}
  .product-entry{grid-template-columns:58px minmax(0,1fr)}
  .product-index{font-size:50px}.product-copy{min-width:0;padding:38px 18px}
  .product-copy h2{font-size:32px}.product-copy p{margin-top:18px;line-height:1.65}
  .product-proof{grid-column:1/-1;margin:0 18px 34px}.proof-layout{grid-template-columns:92px minmax(0,1fr)}.proof-task{padding:18px 14px}.proof-task strong{font-size:20px}
  .method,.about{padding-block:70px}
  .section-intro h2,.about h2{font-size:clamp(36px,10vw,43px)}
  .closing{min-height:400px;padding-block:68px}.closing h2{font-size:clamp(40px,11vw,48px)}
}

@media(max-width:390px){
  body{overflow-x:hidden}
  .site-header{padding-inline:14px}
  .wordmark{gap:8px}.wordmark-mark{width:27px;height:27px}.wordmark strong{font-size:14px}
  .hero-copy,.protocol-flow,.method,.about,.closing{padding-inline:18px}
  .hero h1{font-size:40px}
  .hero-copy>p{font-size:15px}
  .primary-action{min-height:54px;font-size:14px}
  .product-entry{grid-template-columns:48px minmax(0,1fr)}
  .product-index{font-size:42px}.product-copy{padding-inline:15px}.product-copy h2{font-size:29px}
  .stage-foot{padding-inline:18px}
}