:root{
  --ink:#08132B; --ink2:#0E1E44; --blue:#2F62E8; --blue2:#6E95FF; --blue-soft:#EDF2FF;
  --paper:#F6F8FC; --line:#E3E8F1; --text:#0D1527; --muted:#5C667A; --muted2:#8A93A6;
  --serif:"Songti SC","STSong","Noto Serif SC","Noto Serif CJK SC","Source Han Serif SC","SimSun",serif;
  --sans:-apple-system,BlinkMacSystemFont,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans CJK SC","Helvetica Neue",Arial,sans-serif;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;overflow-x:clip}
body{font-family:var(--sans);color:var(--text);background:#fff;-webkit-font-smoothing:antialiased;line-height:1.7;font-size:16px;overflow-x:hidden}
img{max-width:100%;height:auto;display:block}
a{color:inherit;text-decoration:none}
.wrap{width:100%;max-width:1200px;margin:0 auto;padding:0 28px}

/* NAV */
.nav{position:fixed;inset:0 0 auto 0;z-index:50;transition:background .35s,border-color .35s,backdrop-filter .35s;border-bottom:1px solid transparent}
.nav-inner{display:flex;align-items:center;justify-content:space-between;height:68px;gap:24px}
.nav.scrolled{background:rgba(255,255,255,.86);backdrop-filter:saturate(1.6) blur(14px);-webkit-backdrop-filter:saturate(1.6) blur(14px);border-color:var(--line)}
.brand{display:flex;align-items:center;gap:10px}
.brand-mark{width:30px;height:30px;border-radius:8px}
.brand-name{font-family:var(--serif);font-weight:700;font-size:19px;letter-spacing:.04em;color:#fff;transition:color .35s}
.nav.scrolled .brand-name,.brand-name.dark{color:var(--ink)}
.nav-links{display:flex;gap:34px;font-size:14.5px}
.nav-links a{color:rgba(255,255,255,.72);transition:color .2s}
.nav-links a:hover{color:#fff}
.nav.scrolled .nav-links a{color:var(--muted)}
.nav.scrolled .nav-links a:hover{color:var(--ink)}

/* BUTTONS */
.btn{display:inline-flex;align-items:center;gap:8px;height:48px;padding:0 26px;border-radius:999px;font-size:15.5px;font-weight:600;letter-spacing:.02em;transition:transform .2s,box-shadow .2s,background .2s,color .2s;white-space:nowrap}
.btn:hover{transform:translateY(-1px)}
.btn .arrow{transition:transform .2s}
.btn:hover .arrow{transform:translateX(3px)}
.btn-primary{background:var(--blue);color:#fff;box-shadow:0 10px 30px -10px rgba(47,98,232,.7)}
.btn-primary:hover{background:#3A6DF5;box-shadow:0 14px 36px -10px rgba(47,98,232,.85)}
.btn-ghost{color:#fff;border:1px solid rgba(255,255,255,.22)}
.btn-ghost:hover{border-color:rgba(255,255,255,.5)}
.btn-sm{height:38px;padding:0 18px;font-size:14px}
.btn-light{background:#fff;color:var(--ink)}
.nav.scrolled .btn-light{background:var(--ink);color:#fff}
.btn-lg{height:56px;padding:0 34px;font-size:17px}

/* HERO */
.hero{position:relative;background:radial-gradient(120% 80% at 50% 0%,#132A5E 0%,var(--ink) 58%);color:#fff;padding:136px 0 0;z-index:1}
.hero-clip{position:absolute;inset:0;overflow:hidden;pointer-events:none}
#particles,#particles2{position:absolute;inset:0;width:100%;height:100%}
.hero-glow{position:absolute;left:50%;top:58%;width:1100px;height:600px;transform:translateX(-50%);background:radial-gradient(closest-side,rgba(70,120,255,.35),transparent);filter:blur(30px);pointer-events:none}
.hero-inner{position:relative;text-align:center;display:flex;flex-direction:column;align-items:center}
.eyebrow{font-size:13px;letter-spacing:.22em;color:var(--blue);font-weight:600;margin-bottom:18px;text-transform:uppercase}
.eyebrow-dark{color:var(--blue2)}
.hero-title{font-family:var(--serif);font-weight:700;font-size:clamp(46px,8vw,96px);line-height:1.12;letter-spacing:.06em}
.hero-sub{max-width:700px;margin-top:28px;font-size:clamp(16px,1.6vw,18.5px);color:rgba(225,233,255,.74);line-height:1.9}
.hero-cta{display:flex;gap:14px;margin-top:38px;flex-wrap:wrap;justify-content:center}
.hero-url{margin-top:20px;font-size:13px;color:rgba(200,212,245,.5);letter-spacing:.06em}
.hero-shot{position:relative;z-index:3;margin-top:56px;animation:rise 1.2s .35s cubic-bezier(.2,.7,.2,1) both;margin-bottom:-120px;max-width:1240px}
.hero-shot img{width:100%}

/* PROOF */
.proof{padding:180px 0 70px;border-bottom:1px solid var(--line)}
.proof-caption{text-align:center;font-size:13px;color:var(--muted2);letter-spacing:.12em;margin-bottom:34px}
.proof-grid{display:grid;grid-template-columns:repeat(4,1fr)}
.proof-item{text-align:center;padding:8px 10px;border-left:1px solid var(--line)}
.proof-item:first-child{border-left:0}
.proof-item .num{font-family:var(--serif);font-size:clamp(40px,5vw,60px);font-weight:700;color:var(--ink);line-height:1}
.proof-item .unit{font-size:16px;color:var(--muted);margin-left:4px}
.proof-item p{margin-top:12px;color:var(--muted);font-size:14.5px}

/* SECTIONS */
.section{padding:120px 0}
.section-paper{background:var(--paper)}
.section-ink{background:var(--ink);color:#fff;position:relative;overflow:hidden}
.section-head{max-width:820px;margin-bottom:60px}
.section-head.center{text-align:center;margin-left:auto;margin-right:auto}
.h2{font-family:var(--serif);font-weight:700;font-size:clamp(30px,4vw,46px);line-height:1.3;letter-spacing:.03em;color:var(--ink)}
.h2.light{color:#fff}
.lead{margin-top:20px;font-size:17px;color:var(--muted);line-height:1.9}
.lead.light{color:rgba(220,230,255,.7)}
.br-sm{display:none}

/* PAIN */
.pain-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:28px}
.pain{padding:36px 30px 34px;border-top:2px solid var(--ink);background:#fff}
.pain-no{font-family:var(--serif);font-size:15px;color:var(--blue);letter-spacing:.1em}
.pain h3{font-size:21px;margin:16px 0 12px;font-weight:700;letter-spacing:.02em}
.pain p{color:var(--muted);font-size:15px}

/* MODULES */
.module-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.module{background:#fff;border:1px solid var(--line);border-radius:18px;padding:30px 26px;transition:transform .3s,box-shadow .3s,border-color .3s}
.module:hover{transform:translateY(-4px);box-shadow:0 24px 50px -28px rgba(15,35,80,.35);border-color:#D3DCEC}
.module-top{display:flex;justify-content:space-between;align-items:center;margin-bottom:46px}
.module-idx{font-family:var(--serif);font-size:30px;color:#C9D3E6;font-weight:700}
.pill{font-size:12px;padding:4px 10px;border-radius:999px;font-weight:600;letter-spacing:.04em}
.pill-live{background:#E7F6EE;color:#14804A}
.pill-soon{background:var(--blue-soft);color:var(--blue)}
.module h3{font-family:var(--serif);font-weight:700;font-size:24px;margin-bottom:12px;color:var(--ink)}
.module p{font-size:14.5px;color:var(--muted)}

/* FEATURE */
.feature{display:grid;grid-template-columns:5fr 7fr;gap:64px;align-items:center}
.feature-rev .feature-text{order:2}
.feature-rev .feature-media{order:1}
.feature-media img{width:100%}
.media-cap{margin-top:6px;text-align:center;font-size:13px;color:var(--muted2)}
.topics{list-style:none;margin-top:32px;border-top:1px solid var(--line)}
.topics li{display:grid;grid-template-columns:44px 1fr auto;align-items:baseline;gap:6px;padding:11px 0;border-bottom:1px solid var(--line);font-size:15.5px;font-weight:600;color:var(--ink)}
.topics b{font-family:var(--serif);color:var(--blue);font-size:14px}
.topics span{font-weight:400;color:var(--muted2);font-size:13.5px;text-align:right}
.checks{list-style:none;margin-top:34px;display:flex;flex-direction:column;gap:24px}
.checks li{display:flex;gap:16px}
.checks li>span{flex:none;width:26px;height:26px;border-radius:50%;background:var(--blue-soft);color:var(--blue);display:grid;place-items:center;font-size:13px;font-weight:700;margin-top:3px}
.checks b{display:block;font-size:17px;color:var(--ink);margin-bottom:4px}
.checks div{color:var(--muted);font-size:15px}
.stack{position:relative;padding-bottom:18%}
.stack-back{width:94%!important}
.stack-front{position:absolute;width:82%!important;right:-6%;bottom:0}

/* SOURCE */
.source-shot{max-width:1100px;margin:0 auto}
.source-points{display:grid;grid-template-columns:repeat(3,1fr);gap:40px;margin-top:40px}
.sp{border-top:1px solid rgba(255,255,255,.14);padding-top:22px}
.sp h4{font-size:18px;margin-bottom:8px;font-weight:600}
.sp p{color:rgba(215,225,250,.62);font-size:15px}

/* KNOWLEDGE */
.kb-chips{display:flex;flex-wrap:wrap;gap:10px;margin:-20px 0 48px}
.kb-chips span{padding:8px 16px;border:1px solid var(--line);border-radius:999px;font-size:14px;color:var(--ink);background:#fff}
.kb-grid{display:grid;grid-template-columns:1fr 1fr;gap:30px}
.kb-card figcaption{padding:0 24px;color:var(--muted);font-size:15px;margin-top:-8px}
.kb-card b{display:block;color:var(--ink);font-size:18px;margin-bottom:4px;font-family:var(--serif)}

/* FLOW */
.flow{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;position:relative}
.flow::before{content:"";position:absolute;top:27px;left:12%;right:12%;height:1px;background:linear-gradient(90deg,transparent,#C8D3EA 15%,#C8D3EA 85%,transparent)}
.step{text-align:center;position:relative}
.step-no{width:54px;height:54px;border-radius:50%;display:grid;place-items:center;margin:0 auto 22px;background:#fff;border:1px solid #CFD9EE;font-family:var(--serif);font-size:22px;font-weight:700;color:var(--blue);position:relative}
.step h4{font-size:18px;margin-bottom:8px;color:var(--ink)}
.step p{font-size:14.5px;color:var(--muted);max-width:220px;margin:0 auto}

/* ROADMAP */
.road{display:flex;align-items:stretch;gap:0}
.road-node{flex:1;border:1px solid var(--line);border-radius:18px;padding:30px 28px;background:#fff}
.road-line{flex:0 0 60px;align-self:center;height:1px;background:repeating-linear-gradient(90deg,#B9C6E2 0 6px,transparent 6px 12px)}
.road-tag{display:inline-block;font-size:12.5px;color:var(--blue);background:var(--blue-soft);padding:4px 12px;border-radius:999px;font-weight:600}
.road-node h4{font-family:var(--serif);font-weight:700;font-size:24px;margin:18px 0 6px;color:var(--ink)}
.road-node p{color:var(--muted);font-size:15px}
.road-note{margin-top:30px;text-align:center;padding:18px;border-radius:14px;background:var(--paper);color:var(--muted);font-size:15px}
.road-note b{color:var(--ink)}

/* CTA */
.cta{position:relative;background:radial-gradient(90% 120% at 50% 100%,#17337A 0%,var(--ink) 60%);color:#fff;padding:140px 0;overflow:hidden;text-align:center}
.cta-inner{position:relative}
.cta-title{font-family:var(--serif);font-weight:700;font-size:clamp(34px,5vw,58px);line-height:1.3;letter-spacing:.05em}
.cta-sub{margin:24px auto 40px;max-width:560px;color:rgba(220,230,255,.7);font-size:17px}

.footer{border-top:1px solid var(--line);padding:30px 0}
.footer-inner{display:flex;justify-content:space-between;align-items:center;gap:16px;flex-wrap:wrap}
.footer p{color:var(--muted2);font-size:13.5px}

/* REVEAL */
.reveal{opacity:1;transform:none}
.js .reveal{opacity:0;transform:translateY(22px);transition:opacity .9s cubic-bezier(.2,.7,.2,1),transform .9s cubic-bezier(.2,.7,.2,1)}
.js .reveal.in{opacity:1;transform:none}

/* RESPONSIVE */
@media (max-width:960px){
  .nav-links{display:none}
  .module-grid{grid-template-columns:1fr 1fr}
  .feature{grid-template-columns:1fr;gap:40px}
  .feature-rev .feature-text{order:1}.feature-rev .feature-media{order:2}
  .pain-grid,.source-points{grid-template-columns:1fr}
  .kb-grid{grid-template-columns:1fr}
  .flow{grid-template-columns:1fr 1fr;row-gap:44px}.flow::before{display:none}
  .road{flex-direction:column}.road-line{flex:0 0 36px;width:1px;height:36px;background:repeating-linear-gradient(180deg,#B9C6E2 0 6px,transparent 6px 12px)}
  .br-sm{display:inline}
}
@media (max-width:600px){
  .wrap{padding:0 20px}
  .section{padding:84px 0}
  .proof-grid{grid-template-columns:1fr 1fr;row-gap:30px}
  .proof-item:nth-child(3){border-left:0}
  .module-grid{grid-template-columns:1fr}
  .hero{padding-top:120px}
  .hero-shot{margin-bottom:-60px}.proof{padding-top:110px}
  .topics span{display:none}
}
@media (prefers-reduced-motion:reduce){.js .reveal{opacity:1;transform:none;transition:none}html{scroll-behavior:auto}}

@keyframes rise{from{opacity:0;transform:translateY(40px)}to{opacity:1;transform:none}}