*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{margin:0;overflow-wrap:anywhere}
img{max-width:100%;height:auto}
a{color:inherit}
.nt{position:absolute;opacity:0;pointer-events:none}
.burger{display:none;cursor:pointer;width:44px;height:44px;align-items:center;justify-content:center}
.burger span,.burger span::before,.burger span::after{display:block;width:22px;height:2px;background:currentColor;content:"";position:relative}
.burger span::before{position:absolute;top:-7px}.burger span::after{position:absolute;top:7px}
.tbl{overflow-x:auto}table{border-collapse:collapse;width:100%}
details>summary{cursor:pointer;list-style:none}details>summary::-webkit-details-marker{display:none}
@media (max-width:820px){.burger{display:flex}.nav{display:none}.nt:checked~.nav{display:flex}}
@media (prefers-reduced-motion:reduce){*,*::before,*::after{animation:none!important;transition:none!important;scroll-behavior:auto!important}}
body{background:var(--bg);color:var(--ink);font:16px/1.85 var(--ft)}
.wrap{max-width:var(--ww,1080px);margin:0 auto;padding:0 20px}
.brand{display:flex;align-items:center;gap:10px;text-decoration:none}
.brand img{width:38px;height:38px;flex:none}
.brand b{display:block;font-size:18px;letter-spacing:2px;line-height:1.2}
.brand i{display:block;font-style:normal;font-size:11px;color:var(--mut);line-height:1.2}
.nav a{text-decoration:none;color:var(--mut)}
.nav a:hover,.nav a[aria-current]{color:var(--ink)}
.btn{display:inline-block;padding:12px 26px;border-radius:999px;background:var(--acc);color:var(--onacc,#fff);font-weight:700;text-decoration:none;transition:transform .2s,box-shadow .2s}
.btn:hover{transform:translateY(-2px)}
.article{max-width:var(--aw,780px);margin:0 auto;padding:36px 20px 72px}
.crumbs{font-size:13px;color:var(--mut);display:flex;gap:8px;flex-wrap:wrap;margin-bottom:14px}.crumbs a{text-decoration:none}
.article h1{font-size:clamp(26px,4vw,36px);line-height:1.35;margin:0 0 10px}
.meta{color:var(--mut);font-size:13px;margin:0 0 24px}
.prose h2{font-size:23px;line-height:1.4;margin:2em 0 .6em}
.prose h3{font-size:18px;margin:1.6em 0 .4em}
.prose p{margin:.9em 0}
.prose ul,.prose ol{padding-left:1.3em}.prose li{margin:.35em 0}
.prose a{color:var(--acc2);text-underline-offset:3px}
.lede{font-size:18px}
.steps{counter-reset:s;list-style:none;padding:0!important}
.steps li{counter-increment:s;position:relative;padding:16px 16px 16px 66px;margin:12px 0;background:var(--card);border:1px solid var(--line);border-radius:var(--r)}
.steps li::before{content:counter(s);position:absolute;left:16px;top:16px;width:34px;height:34px;border-radius:50%;background:var(--acc);color:var(--onacc,#fff);display:grid;place-items:center;font-weight:700}
.steps b{display:block}.steps span{color:var(--mut)}
.tbl{border:1px solid var(--line);border-radius:var(--r);margin:1.2em 0}
th,td{padding:10px 14px;text-align:left;border-bottom:1px solid var(--line);font-size:15px;vertical-align:top}
tbody tr:last-child>*{border-bottom:0}
thead th{background:var(--card);white-space:nowrap}
.callout{background:var(--card);border:1px solid var(--line);border-left:4px solid var(--acc);border-radius:var(--r);padding:14px 18px;margin:1.4em 0}
.cta-row{margin:24px 0}.cta-row small{display:block;margin-top:8px;color:var(--mut)}
.faq details{border:1px solid var(--line);border-radius:var(--r);margin:10px 0;background:var(--card)}
.faq summary{padding:14px 18px;font-weight:600}
.faq summary::after{content:"+";float:right;color:var(--acc2)}
.faq details[open] summary::after{content:"−"}
.faq details p{margin:0;padding:0 18px 16px;color:var(--mut)}
.kv div{display:grid;grid-template-columns:150px 1fr;gap:12px;padding:12px 0;border-bottom:1px solid var(--line)}
.kv dt{font-weight:700;color:var(--acc2)}.kv dd{margin:0}
.endcta{margin-top:44px;padding:24px;border-radius:var(--r);background:var(--card);border:1px solid var(--line);text-align:center}
.endcta p{margin:.3em 0}
.related{margin-top:40px}.related h2{font-size:20px}
.related ul{list-style:none;padding:0}.related li{padding:12px 0;border-bottom:1px solid var(--line)}
.related a{font-weight:700;display:block;text-decoration:none}.related a:hover{color:var(--acc2)}
.related span{color:var(--mut);font-size:14px}
.site-footer{border-top:1px solid var(--line);padding:34px 0;color:var(--mut);font-size:14px}
.site-footer p{margin:.5em 0}.site-footer a{color:var(--ink)}
.fnav{display:flex;gap:18px;flex-wrap:wrap;margin:10px 0}
.toc{display:none}
@media (max-width:820px){.kv div{grid-template-columns:1fr;gap:2px}.steps li{padding-left:58px}}
:root{--bg:#0e1430;--card:#17204a;--ink:#eef0ff;--mut:#a7b0d8;--line:#2a3566;--acc:#ff8c5a;--acc2:#ffb27d;--onacc:#1b1030;--r:14px;--ft:"PingFang SC","Microsoft YaHei","Noto Sans SC",system-ui,sans-serif}
.site-header{position:sticky;top:0;z-index:20;background:rgba(14,20,48,.82);backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
.site-header .wrap{display:flex;align-items:center;gap:18px;min-height:64px}
.shell-top .nav{display:flex;gap:20px;margin-left:auto;font-size:15px}
.hd-cta .btn{padding:8px 18px;font-size:14px}
.hero{position:relative;overflow:hidden;padding:76px 0 64px;background:radial-gradient(900px 480px at 78% 20%,rgba(143,72,186,.45),transparent 70%),radial-gradient(700px 420px at 12% 90%,rgba(255,140,90,.22),transparent 70%)}
.hero-in{display:grid;grid-template-columns:1.2fr .8fr;gap:30px;align-items:center}
.eyebrow{color:var(--acc2);letter-spacing:3px;font-size:13px;margin:0 0 12px}
.hero h1{font-size:clamp(34px,6vw,58px);line-height:1.15;margin:0 0 16px;background:linear-gradient(95deg,#ffd9b0,#ff8c5a 45%,#c07be0);-webkit-background-clip:text;background-clip:text;color:transparent}
.hero p.sub{font-size:18px;color:var(--mut);max-width:34em}
.hero-cta{display:flex;gap:14px;flex-wrap:wrap;margin-top:26px;align-items:center}
.ghost{color:var(--ink);text-decoration:none;border-bottom:1px dashed var(--mut);padding-bottom:2px}
.hero-art{display:grid;place-items:center}
.orbit{position:relative;width:min(320px,70vw);aspect-ratio:1;display:grid;place-items:center}
.orbit img{width:58%;filter:drop-shadow(0 0 36px rgba(255,140,90,.45));animation:float 5s ease-in-out infinite}
.orbit::before,.orbit::after{content:"";position:absolute;inset:0;border-radius:50%;border:1px dashed rgba(167,176,216,.4);animation:spin 26s linear infinite}
.orbit::after{inset:-26px;border-style:solid;border-color:rgba(255,140,90,.25);animation-duration:40s;animation-direction:reverse}
.orbit i{position:absolute;top:6%;left:50%;width:10px;height:10px;border-radius:50%;background:var(--acc);box-shadow:0 0 18px var(--acc);transform-origin:0 154px;animation:spin 9s linear infinite}
@keyframes spin{to{transform:rotate(360deg)}}
@keyframes float{50%{transform:translateY(-10px)}}
.sec{padding:54px 0}.sec h2{font-size:28px;margin:0 0 8px}.sec .lead{color:var(--mut);margin:0 0 26px}
.quad{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;list-style:none;padding:0;margin:0}
.quad li{background:var(--card);border:1px solid var(--line);border-radius:var(--r);padding:20px}
.quad b{display:block;color:var(--acc2);margin-bottom:6px}.quad span{color:var(--mut);font-size:15px}
.cards{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;list-style:none;padding:0;margin:0}
.cards a{display:block;height:100%;background:var(--card);border:1px solid var(--line);border-radius:var(--r);padding:18px;text-decoration:none;transition:transform .2s,border-color .2s}
.cards a:hover{transform:translateY(-4px);border-color:var(--acc)}
.cards b{display:block;margin-bottom:6px}.cards span{color:var(--mut);font-size:14px}
.flow{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;counter-reset:f;list-style:none;padding:0}
.flow li{counter-increment:f;position:relative;background:linear-gradient(160deg,#1c2756,#151d44);border:1px solid var(--line);border-radius:var(--r);padding:22px 20px 20px 20px}
.flow li::before{content:"0" counter(f);display:block;font-size:30px;font-weight:800;color:var(--acc);margin-bottom:4px}
.flow b{display:block}.flow span{color:var(--mut);font-size:15px}
.note{background:var(--card);border:1px dashed var(--line);border-radius:var(--r);padding:16px 20px;color:var(--mut);font-size:14px}
@media (max-width:820px){.hero-in{grid-template-columns:1fr}.hero-art{order:-1}.quad,.cards,.flow{grid-template-columns:1fr}.hero{padding-top:36px}.hd-cta{display:none}.site-header .wrap{flex-wrap:wrap;padding-top:6px}.burger{margin-left:auto}.shell-top .nav{display:none;width:100%;flex-direction:column;gap:2px;margin:0;padding-bottom:10px}.shell-top .nav a{padding:10px 4px}}