:root{--bg:#F7F4FF;--white:#fff;--soft:#EEF2FF;--ink:#1B1340;--text:#2F2A4A;--muted:#5B5678;--faint:#8B86A3;--purple:#7C3AED;--lav:#A78BFA;--teal:#14B8A6;--coral:#F97316;--pink:#E11D48;--amber:#F59E0B;--indigo:#312E81;--border:rgba(124,58,237,.14);--shadow:0 16px 40px rgba(49,46,129,.10)}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--bg);color:var(--text);font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;line-height:1.75;overflow-x:hidden}body.locked{overflow:hidden}a{color:inherit;text-decoration:none}img{max-width:100%;display:block}.skip-link{position:fixed;left:12px;top:-60px;z-index:1000;background:#fff;padding:10px 14px;border-radius:10px}.skip-link:focus{top:12px}.site-header{position:fixed;top:14px;left:0;right:0;z-index:80;padding:0 16px}.nav-island{max-width:1120px;height:68px;margin:auto;display:grid;grid-template-columns:1fr auto 1fr;align-items:center;gap:14px;padding:10px 14px;border:1px solid rgba(124,58,237,.16);border-radius:24px;background:rgba(255,255,255,.94);box-shadow:var(--shadow);backdrop-filter:blur(14px)}.desktop-nav{display:flex;align-items:center;gap:6px}.nav-right{justify-content:flex-end}.nav-link,.app-pill{min-height:44px;display:inline-flex;align-items:center;padding:0 13px;border-radius:999px;white-space:nowrap;font-size:14px}.nav-link:hover,.nav-link.is-active{background:#f1ebff;outline:1px solid rgba(124,58,237,.22)}.app-pill{background:linear-gradient(135deg,#A78BFA,#7C3AED 50%,#14B8A6);color:#fff;font-weight:700}.icon-button{border:0;background:#f2edff;color:var(--ink);width:44px;height:44px;border-radius:50%;font-size:20px;cursor:pointer;display:inline-grid;place-items:center}.icon-button:hover{transform:translateY(-1px)}button:focus-visible,a:focus-visible,input:focus-visible{outline:3px solid 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var(--border);border-radius:26px;padding:24px}.brick-grid{columns:3 240px;column-gap:18px}.brick{break-inside:avoid;background:#fff;border:1px solid var(--border);border-radius:24px;padding:22px;margin:0 0 18px}.brick:nth-child(2n){padding-bottom:38px}.brick:nth-child(3n){background:#eefdfb}.folder-list{display:grid;gap:14px}.folder-item{display:grid;grid-template-columns:130px 1fr auto;align-items:center;gap:18px;padding:20px;border:1px solid var(--border);background:#fff;border-radius:22px}.folder-tab{font-weight:900;color:var(--purple)}.big-index{display:grid;gap:26px}.big-index article{display:grid;grid-template-columns:120px 1fr;gap:28px;align-items:start;padding:26px 0;border-bottom:1px solid var(--border)}.big-index .big-num{font-size:72px;line-height:.9;font-weight:900;color:var(--lav)}.timeline{position:relative;padding-left:28px}.timeline:before{content:"";position:absolute;left:7px;top:8px;bottom:8px;width:2px;background:linear-gradient(var(--purple),var(--teal))}.timeline article{position:relative;margin:0 0 26px;padding:20px 22px;background:#fff;border:1px solid var(--border);border-radius:22px}.timeline article:before{content:"";position:absolute;left:-28px;top:28px;width:14px;height:14px;border-radius:50%;background:var(--purple);box-shadow:0 0 0 5px var(--bg)}.status{display:inline-block;border-radius:999px;background:#f0ebff;color:var(--purple);padding:5px 10px;font-size:12px;font-weight:800}.steps{display:grid;gap:24px}.step{display:grid;grid-template-columns:90px 1fr;gap:20px;max-width:880px}.step:nth-child(even){margin-left:auto}.step .step-no{font-size:44px;font-weight:900;color:var(--teal)}.article-flow h2,.article-flow h3{color:var(--ink);margin-top:34px}.article-flow p{margin:12px 0}.article-flow .callout{padding:20px 22px;background:#fff;border-left:4px solid var(--purple);border-radius:0 18px 18px 0}.product-split{display:grid;grid-template-columns:.85fr 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h2{font-size:15px;color:#bfb5e7}.directory-grid a{display:block;padding:10px 0;border-top:1px solid rgba(255,255,255,.12)}.directory-grid a b,.directory-grid a span{display:block}.directory-grid a span{font-size:12px;color:#cfc7e8;margin-top:2px}.overlay{position:fixed;inset:0;background:rgba(27,19,64,.34);z-index:90;opacity:0;visibility:hidden;pointer-events:none;transition:.2s}.overlay.open{opacity:1;visibility:visible;pointer-events:auto}.search-layer{position:fixed;top:94px;left:50%;z-index:110;transform:translateX(-50%) translateY(-14px);width:min(720px,calc(100% - 28px));visibility:hidden;pointer-events:none;opacity:0;transition:.2s}.search-layer.open{visibility:visible;pointer-events:auto;opacity:1;transform:translateX(-50%) translateY(0)}.search-card{background:#f5f1ff;border:1px solid var(--border);border-radius:26px;padding:24px;box-shadow:0 24px 80px rgba(27,19,64,.22)}.search-head{display:flex;justify-content:space-between;gap:18px}.search-head h2{margin:6px 0 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@media(max-width:640px){.site-header{top:8px;padding:0 10px}.nav-island{border-radius:20px;padding:8px 10px}.brand-mark img{max-width:118px;max-height:38px}.wrap,.reading,.footer-inner{width:min(100% - 32px,1200px)}.section{padding:34px 0}.section-lg{padding:44px 0}.home-hero{min-height:auto;gap:28px}.page-hero{padding-top:32px}.page-hero h1,.home-hero h1{font-size:clamp(34px,11vw,52px)}.lead{font-size:17px}.brick-grid{columns:1}.folder-item{grid-template-columns:1fr;gap:8px}.big-index article{grid-template-columns:74px 1fr;gap:14px}.big-index .big-num{font-size:54px}.step{grid-template-columns:62px 1fr}.feature-zigzag article{padding:20px}.footer-groups{grid-template-columns:repeat(2,1fr)}.directory-panel{width:100%;max-height:82vh;border-radius:24px 24px 0 0}.directory-grid{grid-template-columns:1fr}.search-layer{top:0;left:0;transform:none;width:100%;height:100%;background:#f5f1ff;padding:14px}.search-layer.open{transform:none}.search-card{height:calc(100vh - 28px);overflow:auto}.mobile-bottom{position:fixed;left:16px;right:16px;bottom:max(10px,env(safe-area-inset-bottom));z-index:75;height:54px;display:grid;grid-template-columns:repeat(5,1fr);align-items:center;padding:5px;background:rgba(255,255,255,.95);border:1px solid var(--border);border-radius:20px;box-shadow:0 14px 40px rgba(49,46,129,.16)}.mobile-bottom a{text-align:center;font-size:12px;padding:9px 4px;border-radius:14px}.mobile-bottom a.is-active{background:#efe8ff;color:var(--purple);font-weight:800}.site-footer{padding-bottom:110px}.site-main{padding-bottom:68px}.media-shell{padding:10px}.num{font-size:26px}}