:root{
    --brand:#6D28D9;--brand-soft:#A78BFA;--ink:#27242D;--muted:#716B78;--deep:#17151C;--bg:#F7F5FA;--soft:#ECE8F2;--accent:#F59E0B;--white:#fff;--line:#ddd7e4;--shadow:0 18px 60px rgba(38,25,55,.10);--radius:22px;--radius-sm:14px;--max:1200px;--text:720px
}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--bg);color:var(--ink);font:16px/1.75 system-ui,-apple-system,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;-webkit-font-smoothing:antialiased}img{max-width:100%;height:auto;display:block}a{color:inherit;text-decoration:none}button,input,select,textarea{font:inherit}button{cursor:pointer}p{margin:0 0 1.1em}h1,h2,h3{margin:0 0 .65em;line-height:1.2;letter-spacing:-.02em}h1{font-size:clamp(2.2rem,4vw,4.5rem)}h2{font-size:clamp(1.55rem,2.6vw,2.6rem)}h3{font-size:1.15rem}.shell{width:min(calc(100% - 40px),var(--max));margin-inline:auto}.section{padding:86px 0}.section-soft{background:var(--soft);padding:86px 0}.section-dark,.section-deep{background:var(--deep);color:var(--white)}.section-deep{padding:86px 0}.lead{font-size:1.14rem;color:inherit;max-width:760px}.eyebrow{display:inline-block;margin-bottom:14px;color:var(--brand);font-size:.78rem;font-weight:800;letter-spacing:.12em;text-transform:uppercase}.eyebrow.light{color:#d7c8ff}.section-heading{max-width:820px;margin-bottom:32px}.row-heading{max-width:none;display:flex;justify-content:space-between;gap:24px;align-items:flex-end}.skip-link{position:absolute;left:-9999px;top:auto}.skip-link:focus{left:16px;top:16px;background:var(--white);padding:10px 14px;border-radius:8px;z-index:9999}.site-header{position:sticky;top:0;z-index:100;background:rgba(247,245,250,.94);backdrop-filter:blur(14px);border-bottom:1px solid rgba(113,107,120,.16)}.header-inner{min-height:78px;display:flex;align-items:center;gap:24px}.brand-mark{display:flex;align-items:center;gap:10px;min-width:235px}.brand-mark img{width:44px;height:44px;object-fit:contain;border-radius:12px}.brand-mark span{display:grid;line-height:1.12}.brand-mark 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figcaption{font-size:.82rem;color:#b9afc4;padding:12px 4px 3px}.hero-actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:28px}.button{display:inline-flex;align-items:center;justify-content:center;min-height:46px;padding:11px 18px;border-radius:12px;border:1px solid transparent;font-weight:750;transition:.2s transform,.2s box-shadow,.2s background}.button:hover{transform:translateY(-1px)}.button.primary{background:var(--brand);color:#fff;box-shadow:0 10px 28px rgba(109,40,217,.28)}.button.ghost{color:#fff;border-color:rgba(255,255,255,.26);background:rgba(255,255,255,.06)}.button.ghost-dark{border-color:var(--line);background:var(--white);color:var(--ink)}.button.accent{background:var(--accent);color:#261a02}.compact-band{background:#23202a;color:#ded8e4;border-top:1px solid rgba(255,255,255,.06)}.split-note{display:grid;grid-template-columns:1fr 1fr;gap:0}.split-note>div{padding:24px 32px}.split-note>div+div{border-left:1px solid rgba(255,255,255,.08)}.split-note strong{color:#fff}.split-note p{margin:.35em 0 0;color:#bfb6c8}.narrow-copy{max-width:880px}.text-index{display:grid;gap:12px;margin-top:28px}.text-index.two-cols{grid-template-columns:1fr 1fr}.text-index a,.closing-links a{display:block;padding:18px 20px;border:1px solid var(--line);border-radius:14px;background:var(--white);transition:.2s transform,.2s border-color}.text-index a:hover,.closing-links a:hover{transform:translateY(-2px);border-color:var(--brand-soft)}.text-index strong,.closing-links strong{display:block;margin-bottom:4px}.text-index span,.closing-links span{display:block;color:var(--muted);font-size:.92rem}.article-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px}.article-card{background:var(--white);border:1px solid rgba(113,107,120,.15);border-radius:18px;overflow:hidden;min-width:0;display:flex;flex-direction:column}.article-card .thumb{display:block;background:#ded8e7;overflow:hidden}.article-card .thumb img{width:100%;aspect-ratio:16/9;object-fit:cover;transition:.35s transform}.article-card:hover .thumb img{transform:scale(1.025)}.article-card-body{padding:18px;display:flex;flex:1;flex-direction:column}.article-card h3{font-size:1.12rem}.article-card h3 a:hover{color:var(--brand)}.article-card p{font-size:.92rem;color:var(--muted)}.article-card .text-link{margin-top:auto}.text-link,.text-button{color:var(--brand);font-weight:750;border:0;background:none;padding:0}.text-link:hover,.text-button:hover{text-decoration:underline}.topic-index{border-top:1px solid var(--line)}.topic-row{display:grid;grid-template-columns:1fr 260px;gap:36px;align-items:center;padding:28px 0;border-bottom:1px solid var(--line)}.topic-row img{width:260px;aspect-ratio:16/9;object-fit:cover;border-radius:16px}.inline-links{display:flex;gap:14px;flex-wrap:wrap}.inline-links a{color:var(--brand);font-weight:700}.feature-strip{display:grid;grid-template-columns:1fr 420px;gap:56px;align-items:center}.feature-strip p{color:#d2cad9}.feature-strip img{border-radius:22px;aspect-ratio:4/3;object-fit:cover}.editorial-columns{display:grid;grid-template-columns:repeat(3,1fr);gap:32px}.editorial-columns>div{padding-top:18px;border-top:3px solid var(--brand-soft)}.closing-map{padding-top:40px}.closing-links{display:grid;grid-template-columns:repeat(2,1fr);gap:14px}.page-hero{padding:66px 0 54px;background:linear-gradient(180deg,#eee9f4 0,#f7f5fa 100%)}.page-hero.compact h1{max-width:900px;font-size:clamp(2.05rem,3.8vw,3.6rem)}.page-hero p{max-width:820px;color:#5f5865}.page-hero-media{display:grid;grid-template-columns:1fr 380px;gap:48px;align-items:center}.page-hero-media img{border-radius:20px;aspect-ratio:4/3;object-fit:cover;box-shadow:var(--shadow)}.breadcrumbs{padding:18px 0 0}.breadcrumbs ol{display:flex;gap:8px;flex-wrap:wrap;margin:0;padding:0;list-style:none;color:var(--muted);font-size:.86rem}.breadcrumbs li:not(:last-child)::after{content:"/";margin-left:8px;color:#aaa2b0}.breadcrumbs a:hover{color:var(--brand)}.two-column-story{display:grid;grid-template-columns:1fr 320px;gap:60px}.story-main{max-width:760px}.story-main h3{margin-top:28px}.story-aside{align-self:start;position:sticky;top:110px}.story-aside img{border-radius:18px;aspect-ratio:4/3;object-fit:cover}.aside-note{margin-top:16px;padding:18px;border-radius:14px;background:var(--soft)}.aside-note ul{margin:10px 0 0;padding-left:20px}.callout-row{display:flex;justify-content:space-between;gap:40px;align-items:center}.callout-row>div{max-width:760px}.video-lead{padding:70px 0}.video-lead-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:48px;align-items:center}.video-lead-grid p{color:#d8d1dd}.video-lead-grid img{border-radius:22px;aspect-ratio:4/3;object-fit:cover}.steps-line{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}.steps-line>div{padding:22px 0;border-top:2px solid var(--brand)}.steps-line span,.guide-sequence article>span{display:inline-grid;place-items:center;width:34px;height:34px;border-radius:50%;background:var(--soft);color:var(--brand);font-weight:800;font-size:.8rem;margin-bottom:14px}.split-callout{display:flex;justify-content:space-between;align-items:center;gap:50px}.split-callout>div{max-width:760px}.split-callout p{color:#d3cbdc}.editorial-note{display:grid;grid-template-columns:1fr 330px;gap:56px}.editorial-note aside{background:var(--soft);padding:24px;border-radius:18px;align-self:start}.editorial-note ol{padding-left:20px}.category-tabs{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:18px}.category-tabs a{padding:8px 12px;border:1px solid var(--line);border-radius:999px;background:var(--white)}.category-tabs a[aria-current=page]{background:var(--brand);color:#fff;border-color:var(--brand)}.result-count{color:var(--muted);font-size:.9rem;margin-bottom:24px}.catalog-grid{grid-template-columns:repeat(3,minmax(0,1fr))}.guide-sequence{display:grid;grid-template-columns:repeat(2,1fr);gap:18px}.guide-sequence article{padding:26px;border:1px solid var(--line);border-radius:18px;background:var(--white)}.faq-list{max-width:900px}.faq-list details{border-bottom:1px solid var(--line);padding:0}.faq-list summary{list-style:none;cursor:pointer;padding:20px 46px 20px 0;font-weight:800;position:relative}.faq-list summary::-webkit-details-marker{display:none}.faq-list summary::after{content:"+";position:absolute;right:8px;top:17px;color:var(--brand);font-size:1.4rem}.faq-list details[open] summary::after{content:"−"}.faq-list details>div{padding:0 40px 20px 0;color:var(--muted)}.about-layout{display:grid;grid-template-columns:1fr 380px;gap:54px;align-items:start}.about-layout img{border-radius:20px;position:sticky;top:110px}.policy-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:18px}.policy-grid article{padding:26px;border:1px solid var(--line);border-radius:18px;background:var(--white)}.policy-copy{max-width:840px}.contact-layout{display:grid;grid-template-columns:.9fr 1.1fr;gap:54px;align-items:start}.contact-layout img{border-radius:18px;margin-top:24px}.check-list{padding-left:22px}.contact-form{padding:28px;background:var(--white);border:1px solid var(--line);border-radius:20px}.contact-form label{display:grid;gap:8px;margin:0 0 18px;font-weight:700}.contact-form select,.contact-form textarea,.search-page-form input,.search-form input{width:100%;border:1px solid var(--line);border-radius:10px;padding:12px 13px;background:#fff;color:var(--ink)}.contact-form textarea{resize:vertical}.form-notice{padding:12px 14px;background:var(--soft);border-radius:10px}.form-help{font-size:.86rem;color:var(--muted);margin:14px 0 0}.search-page-form{max-width:720px;margin-top:24px}.search-page-form label{display:block;font-weight:700;margin-bottom:8px}.search-page-form>div{display:grid;grid-template-columns:1fr auto;gap:10px}.empty-state{max-width:760px;padding:42px 0}.empty-state img{max-width:280px;border-radius:18px;margin-bottom:24px}.result-list{display:grid;gap:14px;max-width:900px}.result-list article{padding:22px;border:1px solid var(--line);border-radius:16px;background:var(--white)}.result-list article>span{font-size:.78rem;color:var(--brand);font-weight:800}.article-header{padding:58px 0;background:#eee9f4}.article-header-grid{display:grid;grid-template-columns:1fr 390px;gap:48px;align-items:center}.article-header-grid h1{font-size:clamp(2rem,3.6vw,3.5rem)}.article-header-grid img{border-radius:20px;aspect-ratio:4/3;object-fit:cover}.tag-row{display:flex;gap:8px;flex-wrap:wrap;margin-top:22px}.tag-row span{padding:6px 10px;border-radius:999px;background:#ddd3ef;color:#4f2a82;font-size:.8rem}.article-body-layout{display:grid;grid-template-columns:minmax(0,760px) 280px;gap:56px;padding-top:56px;padding-bottom:56px}.article-content section+section{margin-top:42px}.article-content p{font-size:1.03rem}.article-return{margin-top:40px;padding-top:26px;border-top:1px solid var(--line)}.article-sidebar{align-self:start;position:sticky;top:110px;padding:20px;border-radius:16px;background:var(--soft)}.article-sidebar h2{font-size:1.1rem}.article-sidebar p{font-size:.9rem}.not-found{text-align:center;max-width:900px}.error-code{display:block;font-size:5rem;line-height:1;font-weight:900;color:var(--brand);margin-bottom:18px}.site-footer{background:#131117;color:#d8d1dd;padding:60px 0 22px}.footer-grid{display:grid;grid-template-columns:1.4fr repeat(3,1fr);gap:34px}.site-footer h2{font-size:1rem;color:#fff}.site-footer p{font-size:.9rem;color:#a99faf}.site-footer a{display:block;padding:5px 0;font-size:.9rem;color:#c8bfce}.site-footer a:hover{color:#fff}.footer-bottom{border-top:1px solid rgba(255,255,255,.08);margin-top:36px;padding-top:18px;display:flex;justify-content:space-between;font-size:.82rem;color:#8f8598}.search-modal[hidden]{display:none!important}.search-modal{position:fixed;inset:0;z-index:200;display:grid;place-items:start center;padding:10vh 20px 20px}.search-backdrop{position:absolute;inset:0;background:rgba(16,13,19,.72);backdrop-filter:blur(4px)}.search-panel{position:relative;width:min(680px,100%);background:var(--bg);border-radius:22px;padding:28px;box-shadow:0 30px 100px rgba(0,0,0,.35)}.search-close{position:absolute;right:16px;top:14px;border:0;background:transparent;font-size:1.8rem;color:var(--muted)}.search-form label{display:block;font-weight:700;margin-bottom:8px}.search-row{display:grid;grid-template-columns:1fr auto;gap:10px}.search-row button{border:0;border-radius:10px;background:var(--brand);color:#fff;padding:0 18px;font-weight:800}.back-top{position:fixed;right:18px;bottom:18px;width:42px;height:42px;border:0;border-radius:50%;background:var(--deep);color:#fff;box-shadow:var(--shadow);opacity:0;pointer-events:none;transform:translateY(10px);transition:.2s}.back-top.is-visible{opacity:1;pointer-events:auto;transform:none}body.modal-open{overflow:hidden}
@media (max-width:1080px){.primary-nav{gap:2px}.primary-nav a{padding:8px}.home-intro-grid,.video-lead-grid{grid-template-columns:1fr 420px;gap:36px}.article-grid,.catalog-grid{grid-template-columns:repeat(2,1fr)}.feature-strip{grid-template-columns:1fr 360px}.footer-grid{grid-template-columns:1.3fr 1fr 1fr}.footer-grid section:last-child{grid-column:2/4}.article-header-grid{grid-template-columns:1fr 330px}.article-body-layout{grid-template-columns:minmax(0,1fr) 250px}}
@media (max-width:900px){.header-inner{min-height:70px}.brand-mark{min-width:0;margin-right:auto}.brand-mark small{display:none}.menu-toggle{display:inline-flex}.primary-nav{position:absolute;left:20px;right:20px;top:69px;display:none;flex-direction:column;align-items:stretch;padding:12px;background:var(--bg);border:1px solid var(--line);border-radius:14px;box-shadow:var(--shadow)}.primary-nav.is-open{display:flex}.primary-nav a{padding:10px 12px}.home-intro-grid,.video-lead-grid,.page-hero-media,.article-header-grid{grid-template-columns:1fr}.hero-visual,.video-lead-grid img,.page-hero-media img,.article-header-grid img{max-width:640px}.feature-strip{grid-template-columns:1fr}.feature-strip img{max-width:540px}.editorial-columns{grid-template-columns:1fr}.topic-row{grid-template-columns:1fr 220px}.two-column-story,.about-layout,.contact-layout,.editorial-note{grid-template-columns:1fr}.story-aside,.about-layout img{position:static;max-width:520px}.policy-grid{grid-template-columns:1fr 1fr}.article-body-layout{grid-template-columns:1fr}.article-sidebar{position:static}.footer-grid{grid-template-columns:repeat(2,1fr)}.footer-grid section:last-child{grid-column:auto}.steps-line{grid-template-columns:1fr}.guide-sequence{grid-template-columns:1fr 1fr}}
@media (max-width:700px){body{font-size:15px}.shell{width:min(calc(100% - 28px),var(--max))}.section,.section-soft,.section-deep{padding:62px 0}.home-intro,.video-lead{padding:54px 0}.search-open{display:none}.home-intro-grid{grid-template-columns:1fr}.split-note{grid-template-columns:1fr}.split-note>div{padding:20px 14px}.split-note>div+div{border-left:0;border-top:1px solid rgba(255,255,255,.08)}.text-index.two-cols,.closing-links,.article-grid,.catalog-grid,.guide-sequence,.policy-grid{grid-template-columns:1fr}.row-heading{display:block}.row-heading>.text-link{display:inline-block;margin-top:8px}.topic-row{grid-template-columns:1fr}.topic-row img{width:100%;max-width:420px}.feature-strip{gap:28px}.page-hero{padding:50px 0 40px}.callout-row,.split-callout{align-items:flex-start;flex-direction:column}.footer-grid{grid-template-columns:1fr 1fr}.article-body-layout{padding-top:40px}.search-page-form>div,.search-row{grid-template-columns:1fr}.search-row button{min-height:44px}.contact-form{padding:20px}.footer-bottom{display:block}.footer-bottom span{display:block}.footer-bottom span+span{margin-top:4px}}
@media (max-width:480px){.shell{width:min(calc(100% - 22px),var(--max))}.brand-mark strong{font-size:1.05rem}.hero-actions{display:grid}.button{width:100%}.topic-row{gap:18px}.footer-grid{grid-template-columns:1fr}.search-modal{padding:6vh 12px 12px}.search-panel{padding:22px 18px}.article-header{padding:42px 0}.article-card-body{padding:16px}.back-top{right:12px;bottom:12px}}

.reference-list{max-width:900px}.reference-entry{padding:32px 0;border-bottom:1px solid var(--line)}.reference-entry:first-child{padding-top:0}.reference-meta{display:flex;gap:10px;margin-bottom:10px;color:var(--brand);font-size:.78rem;font-weight:800}.reference-meta span+span{color:var(--muted)}.reference-entry h2{font-size:clamp(1.35rem,2vw,1.9rem)}.reference-intro{font-weight:650;color:#4d4652}.pagination{display:flex;justify-content:space-between;align-items:center;gap:16px;padding-top:28px}.pagination a{color:var(--brand);font-weight:800}.pagination span{color:var(--muted);font-size:.9rem}@media(max-width:600px){.pagination{align-items:stretch;flex-direction:column}.pagination a{padding:8px 0}}