:root{--brand:#6D28D9;--brand-soft:#A78BFA;--ink:#27242D;--muted:#716B78;--deep:#17151C;--paper:#F7F5FA;--paper-2:#ECE8F2;--accent:#F59E0B;--white:#fff;--line:#dcd6e6;--radius:18px;--shadow:0 18px 50px rgba(23,21,28,.08)}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--paper);color:var(--ink);font-family:system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;line-height:1.75}img{max-width:100%;height:auto;display:block}a{color:inherit;text-decoration-color:rgba(109,40,217,.35);text-underline-offset:.22em}a:hover{color:var(--brand)}button,input{font:inherit}.shell{width:min(1180px,calc(100% - 40px));margin-inline:auto}.narrow{width:min(820px,calc(100% - 40px));margin-inline:auto}.skip-link{position:fixed;left:16px;top:-80px;z-index:999;background:#fff;padding:10px 16px;border-radius:8px}.skip-link:focus{top:16px}.site-header{position:sticky;top:0;z-index:50;background:rgba(247,245,250,.94);backdrop-filter:blur(16px);border-bottom:1px solid rgba(113,107,120,.16)}.header-row{min-height:78px;display:flex;align-items:center;gap:24px}.brand{display:flex;align-items:center;gap:12px;text-decoration:none;margin-right:auto}.brand img{width:44px;height:44px;object-fit:contain;border-radius:10px}.brand span{display:grid;line-height:1.25}.brand strong{font-size:1.1rem}.brand small{font-size:.76rem;color:var(--muted);margin-top:4px}.primary-nav{display:flex;align-items:center;gap:4px}.primary-nav a{padding:10px 13px;border-radius:999px;text-decoration:none;font-size:.94rem}.primary-nav a:hover,.primary-nav a.is-active{background:var(--paper-2);color:var(--brand)}.search-open,.menu-toggle{border:1px solid var(--line);background:#fff;color:var(--ink);border-radius:999px;padding:10px 15px;cursor:pointer}.menu-toggle{display:none}.search-modal[hidden]{display:none!important}.search-modal{position:fixed;inset:0;z-index:100;background:rgba(23,21,28,.64);display:grid;place-items:center;padding:20px}.search-dialog{width:min(650px,100%);background:#fff;border-radius:24px;padding:34px;position:relative;box-shadow:var(--shadow)}.search-dialog h2{margin:0 0 8px}.search-dialog p{color:var(--muted)}.search-close{position:absolute;right:18px;top:18px;width:40px;height:40px;border:0;border-radius:50%;background:var(--paper-2);font-size:1.5rem;cursor:pointer}.search-form label,.inline-search label,.search-page-form label{display:block;font-weight:700;margin-bottom:8px}.search-line,.inline-search>div,.search-page-form>div{display:flex;gap:10px}.search-line input,.inline-search input,.search-page-form input{flex:1;min-width:0;border:1px solid var(--line);border-radius:12px;padding:12px 14px;background:#fff}.search-line button,.inline-search button,.search-page-form button{border:0;border-radius:12px;padding:12px 18px;background:var(--brand);color:#fff;cursor:pointer}.eyebrow{text-transform:none;letter-spacing:.08em;color:var(--brand);font-weight:800;font-size:.82rem;margin:0 0 10px}.lead{font-size:1.14rem;line-height:1.85;color:#4a4550}.hero{padding:68px 0 56px}.hero-grid{display:grid;grid-template-columns:1.02fr .98fr;gap:54px;align-items:center}.hero h1,.page-hero h1,.article-header h1{font-size:clamp(2.3rem,5vw,4.5rem);line-height:1.06;letter-spacing:-.035em;margin:0 0 24px;color:var(--deep)}.hero-copy .lead{max-width:680px}.hero-actions{display:flex;gap:18px;align-items:center;margin:30px 0}.btn{display:inline-flex;align-items:center;justify-content:center;padding:12px 18px;border-radius:12px;text-decoration:none;font-weight:800}.btn-primary{background:var(--brand);color:#fff}.btn-primary:hover{color:#fff;filter:brightness(.96)}.btn-light{background:#fff;color:var(--deep)}.text-link{font-weight:800;color:var(--brand)}.hero-points{display:grid;gap:8px;padding:0;margin:26px 0 0;list-style:none;color:var(--muted)}.hero-points li:before{content:"•";color:var(--accent);margin-right:8px}.hero-media{margin:0;background:var(--deep);border-radius:28px;overflow:hidden;box-shadow:var(--shadow)}.hero-media img{width:100%;aspect-ratio:19/13;object-fit:cover}.hero-media figcaption{color:#cec8d4;padding:15px 18px;font-size:.84rem}.section{padding:70px 0}.section-tight{padding-top:32px;padding-bottom:48px}.section-alt{background:var(--paper-2)}.section-deep{background:var(--deep);color:#ece8f2}.section-deep h2,.section-deep h3{color:#fff}.section-deep .eyebrow{color:var(--brand-soft)}.section-deep .lead,.section-deep p{color:#c7c0cc}.split-heading{display:grid;grid-template-columns:1.1fr .9fr;gap:56px;align-items:end;margin-bottom:34px}.split-heading h2,.two-column-copy h2,.media-pair h2,.info-columns h2,.section h2{font-size:clamp(1.7rem,3vw,2.7rem);line-height:1.25;margin:0 0 12px;color:var(--deep);letter-spacing:-.02em}.section-deep .split-heading h2,.section-deep h2{color:#fff}.split-heading>p{color:var(--muted);margin:0}.brand-strip{display:grid;grid-template-columns:.9fr 1.1fr;gap:22px}.brand-panel{display:grid;gap:10px;padding:28px;border-radius:18px;background:var(--brand);color:#fff;text-decoration:none}.brand-panel:hover{color:#fff}.brand-panel strong{font-size:1.4rem}.brand-panel span{opacity:.9}.mini-index{border-top:1px solid var(--line)}.mini-index a{display:block;padding:12px 2px;border-bottom:1px solid var(--line);text-decoration:none}.video-intro{display:grid;grid-template-columns:1fr 400px;gap:50px;align-items:center;margin-bottom:36px}.video-intro img{border-radius:22px;aspect-ratio:31/21;object-fit:cover}.editorial-list{border-top:1px solid #3f3945}.editorial-row{display:grid;grid-template-columns:55px 1fr 40px;gap:18px;padding:24px 0;border-bottom:1px solid #3f3945;align-items:start}.row-num{color:var(--brand-soft);font-weight:800}.editorial-row h3{margin:3px 0 6px;font-size:1.22rem}.editorial-row h3 a{text-decoration:none}.editorial-row p{margin:0}.meta{font-size:.78rem;color:var(--muted)!important}.row-arrow{font-size:1.6rem;text-decoration:none;color:var(--brand-soft)}.section-cta{margin-top:28px}.two-column-copy{display:grid;grid-template-columns:1.05fr .95fr;gap:44px}.copy-main{max-width:700px}.note-panel{background:#fff;border:1px solid var(--line);border-radius:18px;padding:26px}.note-panel h3{margin-top:0}.note-panel ul{padding-left:20px}.topic-lines{display:grid;gap:12px}.topic-line{display:grid;grid-template-columns:150px 1fr auto;gap:18px;align-items:center;background:#fff;border:1px solid var(--line);border-radius:16px;padding:10px;text-decoration:none}.topic-line img{width:150px;height:100px;object-fit:cover;border-radius:10px}.topic-line span{display:grid;gap:5px}.topic-line strong{font-size:1.12rem}.topic-line small{color:var(--muted);font-size:.9rem}.topic-line b{padding-right:16px;color:var(--brand)}.section-closing{background:var(--deep);color:#fff}.section-closing h2{color:#fff}.closing-grid{display:grid;grid-template-columns:.8fr 1.2fr;gap:54px}.closing-links{display:grid;gap:10px}.closing-links a,.route-stack a{display:grid;grid-template-columns:1fr auto;gap:14px;background:#25212b;border:1px solid #3c3543;padding:16px 18px;border-radius:13px;text-decoration:none}.closing-links span,.route-stack span{color:#bfb7c4;font-size:.88rem}.page-hero{padding:58px 0 28px}.page-hero.compact h1{max-width:950px;font-size:clamp(2.2rem,4.8vw,4rem)}.page-hero .lead{max-width:860px}.breadcrumbs{width:min(1180px,calc(100% - 40px));margin:22px auto 0;font-size:.86rem;color:var(--muted)}.breadcrumbs ol{display:flex;gap:10px;flex-wrap:wrap;list-style:none;padding:0;margin:0}.breadcrumbs li+li:before{content:"/";margin-right:10px;color:#aaa2b0}.breadcrumbs a{text-decoration:none}.info-columns{display:grid;grid-template-columns:1.05fr .95fr;gap:48px;align-items:start}.info-columns figure{margin:0}.info-columns img,.media-pair img{border-radius:22px;width:100%;object-fit:cover}.info-columns figcaption{font-size:.85rem;color:var(--muted);margin-top:9px}.step-list{list-style:none;padding:0;margin:0;counter-reset:step}.step-list li{display:grid;grid-template-columns:260px 1fr;gap:20px;padding:20px 0;border-top:1px solid var(--line)}.step-list li:last-child{border-bottom:1px solid var(--line)}.step-list strong{font-size:1.05rem}.step-list span{color:var(--muted)}.article-index{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:18px}.article-index article{padding:24px;border:1px solid var(--line);border-radius:16px;background:#fff}.article-index h3{margin:8px 0;font-size:1.15rem}.article-index p{margin:0}.video-hero{padding-bottom:42px}.video-hero-grid{display:grid;grid-template-columns:1fr .9fr;gap:46px;align-items:center}.video-hero-grid img{border-radius:26px;width:100%;aspect-ratio:1.45/1;object-fit:cover}.tag-row{display:flex;flex-wrap:wrap;gap:8px;margin-top:22px}.tag-row span{padding:7px 10px;border:1px solid var(--line);border-radius:999px;background:#fff;font-size:.82rem}.index-band{border-top:1px solid var(--line);border-bottom:1px solid var(--line);padding:16px 0;display:flex;gap:18px;justify-content:space-between;align-items:center}.index-band>div{display:flex;gap:14px;flex-wrap:wrap}.index-band p{margin:0;color:var(--muted);font-size:.9rem}.media-pair{display:grid;grid-template-columns:1fr 1fr;gap:50px;align-items:center}.media-pair.reverse>div{order:1}.media-pair.reverse>img{order:2}.media-pair ol,.plain-list{padding-left:22px}.check-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:1px;background:#403947;border:1px solid #403947}.check-grid article{background:var(--deep);padding:24px}.check-grid h3{margin-top:0}.dense-list{display:grid;grid-template-columns:1fr 1fr;column-gap:34px}.dense-list article{display:grid;grid-template-columns:44px 1fr;gap:14px;padding:21px 0;border-top:1px solid var(--line)}.dense-list article>span{color:var(--brand);font-weight:800}.dense-list h3{margin:4px 0 7px}.dense-list p{margin:0}.relationship{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}.relationship>div{padding:24px;background:#fff;border-radius:16px}.relationship strong{font-size:1.2rem}.relationship a,.relationship span{font-weight:800;color:var(--brand)}.topic-article-list{display:grid;grid-template-columns:repeat(2,1fr);gap:12px}.topic-article-list a{display:grid;gap:6px;padding:16px 0;border-top:1px solid var(--line);text-decoration:none}.section-deep .topic-article-list a{border-color:#403947}.topic-article-list span{font-weight:800}.topic-article-list small{color:var(--muted);font-size:.88rem}.section-deep .topic-article-list small{color:#aaa2b0}.article-header{padding:52px 0 36px}.article-head-grid{display:grid;grid-template-columns:1.08fr .92fr;gap:50px;align-items:center}.article-head-grid img{border-radius:24px;aspect-ratio:10/7;object-fit:cover}.article-meta{color:var(--muted);font-size:.86rem}.article-layout{display:grid;grid-template-columns:minmax(0,760px) 300px;gap:70px;padding-bottom:70px}.article-body section{padding:10px 0 28px;border-bottom:1px solid var(--line)}.article-body h2{font-size:1.65rem}.article-body p{font-size:1.02rem}.sticky-box{position:sticky;top:108px;padding:22px;border-radius:16px;background:var(--paper-2)}.sticky-box h2{font-size:1.15rem;margin-top:0}.sticky-box a{display:block;padding:9px 0;border-top:1px solid #d5cede;text-decoration:none;font-weight:700}.related-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}.related-grid a{display:grid;gap:8px;padding:20px;background:#fff;border-radius:14px;text-decoration:none}.related-grid span{font-size:.88rem;color:var(--muted)}.search-page-form{max-width:700px;margin-top:24px}.empty-state{padding:44px;background:#fff;border:1px solid var(--line);border-radius:20px}.empty-links{display:flex;flex-wrap:wrap;gap:10px;margin-top:20px}.empty-links a{padding:10px 14px;border-radius:999px;background:var(--paper-2);text-decoration:none}.result-count{color:var(--muted)}.search-results{display:grid;gap:12px}.search-results article{padding:20px;border-top:1px solid var(--line)}.search-results span{font-size:.78rem;color:var(--brand);font-weight:800}.search-results h2{font-size:1.25rem;margin:4px 0}.search-results p{margin:0;color:var(--muted)}.guide-flow{display:grid;grid-template-columns:repeat(2,1fr);gap:18px}.guide-flow article{padding:28px;background:#fff;border:1px solid var(--line);border-radius:18px}.guide-flow article>span{font-size:1.8rem;color:var(--brand-soft);font-weight:900}.guide-flow h2{font-size:1.35rem;margin:8px 0}.guide-flow a{font-weight:800;color:var(--brand)}.faq-list{display:grid;gap:10px}.faq-item{background:#fff;border:1px solid var(--line);border-radius:14px;padding:0 18px}.faq-item h2{margin:0;font-size:1.05rem}.faq-item h2 button{width:100%;display:flex;justify-content:space-between;gap:16px;padding:18px 0;background:transparent;border:0;text-align:left;cursor:pointer;font-weight:800}.faq-item h2 b{font-size:1.3rem;color:var(--brand)}.faq-answer{padding:0 0 18px;color:var(--muted)}.policy-copy{max-width:850px}.policy-copy h2{margin-top:34px}.not-found{min-height:62vh;display:grid;align-items:center;padding:70px 0}.not-found h1{font-size:clamp(3rem,9vw,7rem);margin:0}.site-footer{background:#121015;color:#d4cfd8;padding:56px 0 24px}.footer-grid{display:grid;grid-template-columns:1.3fr repeat(3,1fr);gap:32px}.site-footer h2{font-size:1rem;color:#fff}.site-footer p,.site-footer li{font-size:.9rem;color:#aaa2b0}.site-footer ul{list-style:none;padding:0;margin:0}.site-footer a{text-decoration:none}.footer-bottom{border-top:1px solid #332e38;margin-top:34px;padding-top:18px;display:flex;justify-content:space-between;gap:20px;font-size:.8rem;color:#817986}.back-top{position:fixed;right:20px;bottom:20px;z-index:45;border:0;border-radius:999px;background:var(--accent);color:#2a1b03;padding:10px 14px;font-weight:800;cursor:pointer;box-shadow:var(--shadow)}
@media(max-width:1024px){.hero-grid,.video-hero-grid,.article-head-grid,.info-columns,.media-pair,.video-intro{grid-template-columns:1fr}.video-intro img{width:100%;max-height:460px}.check-grid{grid-template-columns:repeat(2,1fr)}.article-layout{grid-template-columns:1fr}.sticky-box{position:static}.footer-grid{grid-template-columns:repeat(2,1fr)}.primary-nav{gap:0}.primary-nav a{padding:9px}.topic-line{grid-template-columns:120px 1fr}.topic-line img{width:120px}.topic-line b{display:none}}
@media(max-width:768px){.shell,.narrow,.breadcrumbs{width:min(100% - 28px,1180px)}.header-row{min-height:68px;flex-wrap:wrap;padding:10px 0}.brand img{width:38px;height:38px}.menu-toggle{display:inline-flex}.search-open{margin-left:auto}.primary-nav{order:3;width:100%;display:none;grid-template-columns:1fr 1fr;padding:8px 0}.primary-nav.is-open{display:grid}.primary-nav a{background:#fff;margin:3px}.hero{padding-top:44px}.hero h1,.page-hero h1,.article-header h1{font-size:clamp(2.15rem,11vw,3.4rem)}.hero-grid,.brand-strip,.split-heading,.two-column-copy,.closing-grid,.dense-list,.topic-article-list,.article-index,.relationship,.guide-flow,.related-grid{grid-template-columns:1fr}.video-intro{gap:28px}.split-heading{gap:14px;align-items:start}.section{padding:52px 0}.editorial-row{grid-template-columns:40px 1fr}.row-arrow{display:none}.topic-line{grid-template-columns:92px 1fr;gap:12px}.topic-line img{width:92px;height:78px}.topic-line small{display:block}.step-list li{grid-template-columns:1fr;gap:6px}.check-grid{grid-template-columns:1fr}.index-band{align-items:flex-start;flex-direction:column}.media-pair{gap:28px}.media-pair.reverse>div,.media-pair.reverse>img{order:initial}.article-layout{padding-bottom:48px}.article-body h2{font-size:1.45rem}.footer-grid{grid-template-columns:1fr 1fr}.footer-bottom{flex-direction:column}.search-dialog{padding:28px 20px}.search-line,.search-page-form>div,.inline-search>div{flex-direction:column}}
@media(max-width:600px){.footer-grid{grid-template-columns:1fr}.hero-actions{align-items:flex-start;flex-direction:column}.topic-line{grid-template-columns:1fr}.topic-line img{width:100%;height:auto;aspect-ratio:16/8}.brand span small{display:none}.section{padding:44px 0}.article-header{padding-top:38px}.related-grid{grid-template-columns:1fr}.closing-links a,.route-stack a{grid-template-columns:1fr}}
@media(max-width:375px){body{font-size:15px}.shell,.narrow,.breadcrumbs{width:calc(100% - 22px)}.search-open{padding:9px 11px}.hero h1,.page-hero h1,.article-header h1{font-size:2.05rem}.section{padding:38px 0}.editorial-row{grid-template-columns:32px 1fr;gap:10px}}