:root{--primary:#5B4BDB;--primary-soft:#8B7CF6;--ink:#1E1B2E;--text:#292734;--muted:#6F6B7A;--bg:#F7F7FB;--soft:#EFEFFC;--accent:#F05A7E;--white:#fff;--line:#DDDCEB;--radius:18px;--radius-lg:30px;--shadow:0 18px 50px rgba(52,43,113,.10);--content:min(1180px,calc(100% - 40px));--reading:min(760px,calc(100% - 40px))}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--bg);color:var(--text);font-family:system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;line-height:1.72;-webkit-font-smoothing:antialiased}img{display:block;max-width:100%;height:auto}a{color:inherit;text-decoration:none}button,input,textarea,select{font:inherit}.skip-link{position:fixed;z-index:999;top:10px;left:10px;padding:10px 14px;background:var(--ink);color:#fff;border-radius:8px;transform:translateY(-150%)}.skip-link:focus{transform:none}
.site-header{position:sticky;top:0;z-index:50;background:rgba(247,247,251,.92);backdrop-filter:blur(18px);border-bottom:1px solid rgba(221,220,235,.78)}.header-shell{width:var(--content);margin:auto;min-height:72px;display:flex;align-items:center;gap:28px}.brand{display:flex;align-items:center;gap:10px;font-weight:800;letter-spacing:-.02em}.brand-mark{width:38px;height:38px;border-radius:12px;display:grid;place-items:center;background:var(--primary);color:#fff;font-size:14px}.brand-name{font-size:22px}.site-nav{margin-left:auto;display:flex;align-items:center;gap:6px}.site-nav a{padding:10px 13px;border-radius:10px;color:var(--muted);font-size:14px;font-weight:650}.site-nav a:hover,.site-nav a:focus-visible{background:var(--soft);color:var(--primary)}.site-nav a[aria-current="page"]{background:var(--ink);color:#fff}.menu-toggle{display:none;margin-left:auto;border:1px solid var(--line);background:#fff;border-radius:10px;padding:9px 12px;gap:8px;align-items:center}.menu-icon{width:18px;height:12px;display:inline-block;border-top:2px solid currentColor;border-bottom:2px solid currentColor;position:relative}.menu-icon::after{content:"";position:absolute;left:0;right:0;top:4px;border-top:2px solid currentColor}
main{min-height:70vh}.breadcrumbs{width:var(--content);margin:24px auto 0;color:var(--muted);font-size:13px}.breadcrumbs ol{display:flex;gap:8px;list-style:none;padding:0;margin:0;flex-wrap:wrap}.breadcrumbs li:not(:last-child)::after{content:"/";margin-left:8px;color:#aaa7bd}.breadcrumbs a:hover{color:var(--primary)}
.hero,.page-hero,.section{width:var(--content);margin-inline:auto}.hero{padding:72px 0 58px;display:grid;grid-template-columns:minmax(0,1.08fr) minmax(360px,.92fr);gap:64px;align-items:center}.kicker,.eyebrow{text-transform:uppercase;letter-spacing:.13em;font-size:12px;font-weight:800;color:var(--primary);margin:0 0 14px}.hero h1,.page-hero h1{font-size:clamp(42px,6vw,74px);line-height:1.06;letter-spacing:-.045em;color:var(--ink);margin:0 0 22px;max-width:870px}.hero-lead,.page-hero>div>p:last-child{font-size:18px;color:var(--muted);max-width:740px}.hero-actions,.button-row{display:flex;gap:12px;flex-wrap:wrap;margin-top:28px}.button{display:inline-flex;align-items:center;justify-content:center;min-height:46px;padding:0 18px;border-radius:12px;font-weight:760;border:1px solid transparent;transition:transform .18s ease,background .18s ease,border-color .18s ease}.button:hover{transform:translateY(-2px)}.button.primary{background:var(--primary);color:#fff;box-shadow:0 9px 22px rgba(91,75,219,.22)}.button.secondary{background:var(--ink);color:#fff}.button.ghost{background:#fff;border-color:var(--line);color:var(--ink)}.hero-note{margin-top:22px;font-size:13px;color:var(--muted)}.hero-media{margin:0;position:relative}.hero-media img{border-radius:var(--radius-lg);box-shadow:var(--shadow);aspect-ratio:1.35/1;object-fit:cover;background:var(--soft)}.hero-media figcaption{position:absolute;right:18px;bottom:18px;background:rgba(30,27,46,.88);color:#fff;border-radius:999px;padding:7px 12px;font-size:12px}.hero-media.vertical img{aspect-ratio:1/1}
.section{padding:72px 0}.section+.section{border-top:1px solid rgba(221,220,235,.65)}.section-heading{max-width:780px;margin-bottom:32px}.section-heading.wide-heading{max-width:900px}.section-heading.compact-heading{max-width:680px}.section-heading h2,.split-copy h2,.sticky-heading h2,.compact-band h2,.quote-band h2,.ledger-head h2{margin:0 0 16px;color:var(--ink);font-size:clamp(30px,4vw,46px);line-height:1.15;letter-spacing:-.035em}.section-heading p:last-child,.split-copy p,.sticky-heading p:last-child,.compact-band p,.quote-band p,.ledger-head p{color:var(--muted)}
.topic-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:18px}.topic-card{padding:28px;border:1px solid var(--line);border-radius:var(--radius);background:#fff;min-height:260px;display:flex;flex-direction:column}.topic-card h3{font-size:24px;line-height:1.25;margin:0 0 12px;color:var(--ink)}.topic-card p:not(.eyebrow){margin:0 0 22px;color:var(--muted)}.text-link{margin-top:auto;color:var(--primary);font-weight:760}.text-link:hover{text-decoration:underline;text-underline-offset:4px}.text-link.strong{display:inline-block;margin-top:18px}
.split-feature{display:grid;grid-template-columns:minmax(0,1fr) minmax(360px,.92fr);gap:56px;align-items:center}.split-feature.soft{width:100%;max-width:none;padding:88px max(20px,calc((100% - 1180px)/2));background:var(--soft);border-top:0}.feature-media{margin:0}.feature-media img{border-radius:var(--radius-lg);aspect-ratio:1.32/1;object-fit:cover;box-shadow:var(--shadow)}.check-list{list-style:none;padding:0;margin:24px 0}.check-list li{position:relative;padding:10px 0 10px 28px;border-bottom:1px solid rgba(111,107,122,.16)}.check-list li::before{content:"✓";position:absolute;left:0;color:var(--primary);font-weight:900}
.flow-links{display:grid;grid-template-columns:repeat(3,1fr);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;background:#fff}.flow-links a{padding:28px;display:grid;gap:7px}.flow-links a+a{border-left:1px solid var(--line)}.flow-links span{color:var(--primary);font-weight:850;font-size:12px}.flow-links strong{font-size:21px;color:var(--ink)}.flow-links small{color:var(--muted)}.flow-links a:hover{background:var(--soft)}
.compact-band{display:flex;align-items:center;justify-content:space-between;gap:30px;background:var(--ink);color:#fff;border-radius:var(--radius-lg);padding:42px 46px;margin-top:30px;margin-bottom:80px}.compact-band h2{color:#fff;font-size:34px}.compact-band p{color:#c7c4d8;max-width:760px;margin-bottom:0}
.page-hero{padding:62px 0 54px;display:grid;grid-template-columns:minmax(0,1.1fr) minmax(300px,.65fr);gap:56px;align-items:center}.page-hero.narrow-hero h1{font-size:clamp(40px,5.4vw,66px)}.domain-card{padding:30px;border-radius:var(--radius);background:var(--ink);color:#fff;display:grid;gap:10px;box-shadow:var(--shadow)}.domain-card span,.domain-card small{color:#c8c4da}.domain-card strong{font-size:22px;word-break:break-word}
.two-column{display:grid;grid-template-columns:minmax(260px,.64fr) minmax(0,1.36fr);gap:70px;align-items:start}.sticky-heading{position:sticky;top:110px}.stack-list{display:grid;gap:12px}.stack-list article{display:grid;grid-template-columns:54px 1fr;gap:18px;padding:22px 0;border-bottom:1px solid var(--line)}.stack-list h3{margin:0 0 8px;color:var(--ink);font-size:21px}.stack-list p{margin:0;color:var(--muted)}.step-num{width:42px;height:42px;display:grid;place-items:center;border-radius:12px;background:var(--soft);color:var(--primary);font-weight:850}
.link-panel{display:grid;grid-template-columns:.7fr 1.3fr;gap:44px}.link-panel-grid{display:grid;gap:10px}.link-panel-grid a{padding:20px 22px;border-radius:14px;background:#fff;border:1px solid var(--line);display:grid;gap:4px}.link-panel-grid a:hover{border-color:var(--primary-soft);box-shadow:0 10px 22px rgba(91,75,219,.08)}.link-panel-grid strong{color:var(--ink)}.link-panel-grid span{color:var(--muted);font-size:14px}
.together-hero{grid-template-columns:1.1fr .72fr}.timeline{position:relative;max-width:900px;margin-left:auto}.timeline::before{content:"";position:absolute;left:27px;top:24px;bottom:24px;width:2px;background:var(--line)}.timeline article{position:relative;display:grid;grid-template-columns:56px 1fr;gap:20px;padding:22px 0}.timeline article>span{position:relative;z-index:1;width:56px;height:56px;display:grid;place-items:center;border-radius:50%;background:var(--primary);color:#fff;font-weight:850}.timeline h3{margin:2px 0 8px;font-size:23px;color:var(--ink)}.timeline p{margin:0;color:var(--muted)}
.media-strip{display:grid;grid-template-columns:.78fr 1.22fr;gap:45px;align-items:center}.media-strip figure{margin:0}.media-strip img{border-radius:var(--radius);aspect-ratio:1.55/1;object-fit:cover}.inline-links{display:flex;gap:18px;flex-wrap:wrap;margin-top:24px}.inline-links a{color:var(--primary);font-weight:760}.quote-band{display:grid;grid-template-columns:.85fr 1.15fr;gap:50px;align-items:end;background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:34px 38px!important}.quote-band h2{font-size:32px}
.video-hero{grid-template-columns:1.15fr .55fr}.video-index{display:grid;border-left:2px solid var(--primary);padding-left:20px}.video-index a{padding:10px 0;color:var(--muted)}.video-index a:hover{color:var(--primary)}.video-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:22px}.video-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden}.video-card img{width:100%;aspect-ratio:1.62/1;object-fit:cover;background:var(--soft)}.video-card>div{padding:22px}.video-card h3{font-size:23px;margin:5px 0 8px;color:var(--ink)}.video-card p{margin:0;color:var(--muted)}.card-index{font-size:11px;font-weight:850;color:var(--primary)}
.content-ledger{display:grid;grid-template-columns:.6fr 1.4fr;gap:60px}.ledger-rows{border-top:1px solid var(--line)}.ledger-rows>div{display:grid;grid-template-columns:.7fr 1.2fr .65fr;gap:20px;padding:22px 0;border-bottom:1px solid var(--line);align-items:start}.ledger-rows strong{color:var(--ink)}.ledger-rows span{color:var(--muted)}.ledger-rows a{color:var(--primary);font-weight:760}
.app-hero{grid-template-columns:1.05fr .7fr}.phone-visual{margin:0;display:flex;justify-content:center}.phone-visual img{border-radius:40px;max-width:420px;aspect-ratio:1/1;object-fit:cover;box-shadow:var(--shadow)}.option-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}.option-grid article{padding:28px;border-radius:var(--radius);background:#fff;border:1px solid var(--line)}.option-grid span{color:var(--primary);font-size:12px;font-weight:850}.option-grid h3{font-size:22px;color:var(--ink);margin:10px 0}.option-grid p{color:var(--muted);margin:0}.prose-stack h3{margin:0 0 8px;color:var(--ink);font-size:22px}.prose-stack p{margin:0 0 28px;color:var(--muted)}
.guide-steps{display:grid;grid-template-columns:repeat(5,1fr);gap:12px}.guide-steps article{padding:22px;border-radius:var(--radius);background:#fff;border:1px solid var(--line)}.guide-steps>article>span{display:grid;place-items:center;width:38px;height:38px;background:var(--soft);color:var(--primary);border-radius:10px;font-weight:850}.guide-steps h3{font-size:18px;line-height:1.35;color:var(--ink)}.guide-steps p{font-size:14px;color:var(--muted);margin-bottom:0}.faq-list{max-width:920px}.faq-list details{background:#fff;border:1px solid var(--line);border-radius:14px;margin-bottom:10px}.faq-list summary{cursor:pointer;padding:20px 22px;font-weight:760;color:var(--ink)}.faq-list details p{padding:0 22px 22px;margin:0;color:var(--muted)}
.knowledge-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}.knowledge-grid article{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:24px}.knowledge-grid h3{margin:0 0 10px;color:var(--ink);font-size:20px;line-height:1.35}.knowledge-grid p{margin:0;color:var(--muted)}
.error-page{width:var(--reading);margin:0 auto;padding:120px 0 140px;text-align:center}.error-code{font-size:80px;line-height:1;margin:0;color:var(--primary);font-weight:900;letter-spacing:-.05em}.error-page h1{font-size:42px;color:var(--ink);margin:12px 0}.error-page>p:not(.error-code){color:var(--muted)}.error-page .hero-actions{justify-content:center}
.site-footer{margin-top:30px;background:#171524;color:#fff;padding:58px 0}.footer-grid{width:var(--content);margin:auto;display:grid;grid-template-columns:1.15fr .8fr .55fr;gap:46px}.footer-brand{font-size:26px;font-weight:850}.footer-grid p{color:#aaa6be;max-width:430px}.footer-nav,.footer-meta{display:grid;align-content:start;gap:10px}.footer-nav a,.footer-meta a,.footer-meta span{color:#c9c6d7;font-size:14px}.footer-nav a:hover,.footer-meta a:hover{color:#fff}a:focus-visible,button:focus-visible,summary:focus-visible{outline:3px solid rgba(240,90,126,.45);outline-offset:3px}.soft{background:var(--soft)}
@media(max-width:980px){:root{--content:min(100% - 28px,900px)}.header-shell{min-height:64px}.menu-toggle{display:flex}.site-nav{display:none;position:absolute;top:64px;left:14px;right:14px;padding:10px;background:#fff;border:1px solid var(--line);border-radius:14px;box-shadow:var(--shadow);flex-direction:column;align-items:stretch}.site-nav.is-open{display:flex}.site-nav a{padding:12px 14px}.hero,.page-hero,.split-feature,.two-column,.link-panel,.media-strip,.content-ledger{grid-template-columns:1fr}.hero{padding-top:48px;gap:36px}.hero-media{max-width:760px}.page-hero{gap:30px}.sticky-heading{position:static}.split-feature.soft{padding:64px 18px}.flow-links{grid-template-columns:1fr}.flow-links a+a{border-left:0;border-top:1px solid var(--line)}.video-grid{grid-template-columns:1fr 1fr}.option-grid{grid-template-columns:1fr}.guide-steps{grid-template-columns:1fr 1fr}.ledger-rows>div{grid-template-columns:.8fr 1.2fr}.ledger-rows a{grid-column:2}.footer-grid{grid-template-columns:1fr 1fr}.footer-meta{grid-column:1/-1;grid-auto-flow:column;justify-content:start}.compact-band{margin-bottom:50px}}
@media(max-width:640px){:root{--content:calc(100% - 24px)}body{font-size:15px}.hero,.section,.page-hero{padding-top:48px;padding-bottom:48px}.hero h1,.page-hero h1{font-size:40px}.hero-lead,.page-hero>div>p:last-child{font-size:16px}.topic-grid,.video-grid,.guide-steps,.knowledge-grid{grid-template-columns:1fr}.topic-card{min-height:0}.split-feature.soft{padding:50px 12px}.compact-band{width:var(--content);padding:28px;align-items:flex-start;flex-direction:column;border-radius:22px}.page-hero{grid-template-columns:1fr}.domain-card{padding:24px}.timeline{margin:0}.timeline article{grid-template-columns:46px 1fr;gap:14px}.timeline article>span{width:46px;height:46px}.timeline::before{left:22px}.quote-band{grid-template-columns:1fr;padding:28px!important}.content-ledger{gap:24px}.ledger-rows>div{grid-template-columns:1fr;gap:8px}.ledger-rows a{grid-column:auto}.footer-grid{grid-template-columns:1fr}.footer-meta{grid-column:auto;grid-auto-flow:row}.phone-visual img{max-width:100%}.section-heading h2,.split-copy h2,.sticky-heading h2{font-size:32px}.hero-actions .button{flex:1 1 100%}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*::before,*::after{animation-duration:.001ms!important;animation-iteration-count:1!important;transition-duration:.001ms!important}}

.search-hero{grid-template-columns:1fr;padding-bottom:22px}.search-shell{padding-top:28px}.search-form{max-width:820px}.search-form label{display:block;font-weight:800;color:var(--ink);margin-bottom:10px}.search-row{display:grid;grid-template-columns:1fr auto;gap:10px}.search-row input{min-width:0;height:50px;border:1px solid var(--line);border-radius:12px;background:#fff;padding:0 16px;color:var(--text);outline:none}.search-row input:focus{border-color:var(--primary);box-shadow:0 0 0 4px rgba(91,75,219,.10)}.search-empty{margin-top:42px;padding:32px;border-radius:var(--radius);background:#fff;border:1px solid var(--line)}.search-empty h2,.result-head h2{margin:0 0 12px;color:var(--ink)}.search-suggestions{display:flex;gap:10px;flex-wrap:wrap}.search-suggestions a{padding:9px 13px;background:var(--soft);color:var(--primary);border-radius:999px;font-weight:700;font-size:14px}.search-results{margin-top:42px;max-width:920px}.result-head{display:flex;align-items:end;justify-content:space-between;gap:20px;border-bottom:1px solid var(--line);padding-bottom:14px}.result-head span{color:var(--muted);font-size:14px}.search-result{padding:22px 0;border-bottom:1px solid var(--line)}.search-result>span{font-size:11px;font-weight:850;letter-spacing:.12em;color:var(--primary)}.search-result h3{font-size:22px;margin:5px 0 7px;color:var(--ink)}.search-result h3 a:hover{color:var(--primary)}.search-result p{margin:0;color:var(--muted)}@media(max-width:640px){.search-row{grid-template-columns:1fr}.search-row .button{width:100%}}