:root{
  --purple:#7C5C8E;--purple-soft:#B89ABF;--ink:#25212A;--paper:#F8F5F3;--soft:#EEE8EF;--text:#302C33;--muted:#726B76;--accent:#D58A45;--line:#DCD3DE;--white:#fff;--radius:22px;--shadow:0 18px 45px rgba(58,45,64,.08);--shell:min(1180px,calc(100% - 48px));
}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--paper);color:var(--text);font:16px/1.75 system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI","Microsoft YaHei",sans-serif;text-rendering:optimizeLegibility}img{display:block;max-width:100%;height:auto}a{color:inherit;text-decoration-thickness:1px;text-underline-offset:4px}button,input{font:inherit}button{cursor:pointer}.shell{width:var(--shell);margin-inline:auto}.narrow{max-width:760px}.narrow-left{max-width:920px;margin-left:max(24px,calc((100% - min(1180px,100% - 48px))/2));margin-right:24px}.skip-link{position:fixed;left:16px;top:-80px;z-index:1000;background:var(--ink);color:#fff;padding:10px 16px;border-radius:8px}.skip-link:focus{top:16px}.eyebrow{margin:0 0 10px;color:var(--purple);font-size:.76rem;letter-spacing:.16em;text-transform:uppercase;font-weight:800}.muted{color:var(--muted)}code{background:var(--soft);border-radius:6px;padding:.1em .35em}.button{display:inline-flex;align-items:center;justify-content:center;min-height:46px;padding:0 19px;border-radius:999px;background:var(--purple);color:#fff;text-decoration:none;font-weight:700;border:1px solid var(--purple)}.button:hover{background:#684b78}.button.warm{background:var(--accent);border-color:var(--accent);color:#201a17}.text-link{color:var(--purple);font-weight:750}.light-link{color:#f5e9df}.inline-links{display:flex;gap:18px;align-items:center;flex-wrap:wrap}.site-header{position:sticky;top:0;z-index:100;background:rgba(248,245,243,.92);backdrop-filter:blur(14px);border-bottom:1px solid rgba(124,92,142,.12)}.header-inner{width:var(--shell);height:76px;margin:auto;display:grid;grid-template-columns:auto 1fr auto;align-items:center;gap:22px}.brand{display:flex;align-items:center;gap:10px;text-decoration:none}.brand img{width:44px;height:44px;object-fit:contain;border-radius:12px}.brand span{display:grid;line-height:1.25}.brand strong{font-size:1.02rem}.brand small{font-size:.72rem;color:var(--muted);margin-top:3px}.site-nav{justify-self:center;display:flex;gap:6px}.site-nav a{padding:8px 12px;text-decoration:none;border-radius:999px;color:#4d4650;font-weight:650}.site-nav a:hover{background:var(--soft);color:var(--ink)}.search-trigger,.nav-toggle{border:1px solid var(--line);background:#fff;color:var(--ink);border-radius:999px;padding:9px 14px;font-weight:700}.nav-toggle{display:none}.search-modal[hidden]{display:none!important}.search-modal{position:fixed;inset:0;z-index:500;display:grid;place-items:start center;padding-top:min(18vh,160px)}.search-backdrop{position:absolute;inset:0;background:rgba(37,33,42,.58)}.search-panel{position:relative;width:min(650px,calc(100% - 32px));background:var(--paper);padding:30px;border-radius:26px;box-shadow:0 24px 70px rgba(0,0,0,.2)}.search-panel h2{font-size:clamp(1.5rem,3vw,2.2rem);margin:0 0 20px}.search-close{position:absolute;right:18px;top:16px;border:0;background:transparent;font-size:2rem;line-height:1}.search-form label,.search-page-form label{display:block;font-weight:700;margin-bottom:8px}.search-row,.search-page-form div{display:grid;grid-template-columns:1fr auto;gap:10px}.search-row input,.search-page-form input{width:100%;border:1px solid var(--line);border-radius:14px;background:#fff;padding:12px 14px;min-width:0}.search-row button,.search-page-form button{border:0;border-radius:14px;background:var(--purple);color:#fff;padding:0 18px;font-weight:800}.modal-open{overflow:hidden}.breadcrumbs{width:var(--shell);margin:24px auto 0}.breadcrumbs ol{display:flex;gap:8px;align-items:center;list-style:none;padding:0;margin:0;color:var(--muted);font-size:.86rem;flex-wrap:wrap}.breadcrumbs li+li:before{content:"/";margin-right:8px;color:#aaa1ab}.breadcrumbs a{color:var(--purple)}.home-lead{display:grid;grid-template-columns:1.05fr .95fr;gap:58px;align-items:center;padding:72px 0 62px}.lead-copy h1{font-size:clamp(2.45rem,5.6vw,5.4rem);line-height:1.02;letter-spacing:-.055em;margin:.1em 0 .35em;max-width:12ch}.lead-text{font-size:1.12rem;color:#5e5661;max-width:700px}.lead-actions{display:flex;gap:18px;align-items:center;flex-wrap:wrap;margin-top:30px}.lead-visual{margin:0;position:relative}.lead-visual img{width:100%;aspect-ratio:4/3;object-fit:cover;border-radius:42% 58% 56% 44%/49% 44% 56% 51%;box-shadow:var(--shadow)}.lead-visual figcaption{position:absolute;right:8%;bottom:4%;background:rgba(248,245,243,.92);padding:10px 14px;border-radius:999px;font-size:.8rem;color:var(--muted)}.intro-strip{display:grid;grid-template-columns:.8fr 1.2fr;gap:80px;padding:36px 0 78px;border-top:1px solid var(--line)}.intro-strip h2{font-size:clamp(1.8rem,4vw,3.2rem);line-height:1.12;margin:0;letter-spacing:-.035em}.intro-strip>p{font-size:1.08rem;margin:6px 0;color:#5e5661}.section-heading{display:flex;justify-content:space-between;gap:30px;align-items:end;margin-bottom:28px}.section-heading h2{font-size:clamp(2rem,4.6vw,3.8rem);line-height:1.08;letter-spacing:-.04em;margin:0;max-width:14ch}.section-heading>a{color:var(--purple);font-weight:750;white-space:nowrap}.category-index{padding:20px 0 90px}.editorial-grid{display:grid;grid-template-columns:1.25fr .75fr;gap:18px}.category-row{display:grid;grid-template-columns:132px 1fr;gap:18px;align-items:center;background:#fff;border:1px solid rgba(124,92,142,.12);padding:14px;border-radius:18px}.category-row img{width:132px;height:112px;object-fit:cover;border-radius:12px}.category-row h3{margin:0;font-size:1.2rem}.category-row p{margin:5px 0 8px;color:var(--muted);font-size:.92rem}.category-row a{color:var(--purple);font-weight:700;font-size:.9rem}.category-row .count{float:right;color:#b0a6b2;font-size:.75rem}.category-feature{grid-row:span 3;grid-template-columns:1fr;padding:18px}.category-feature img{width:100%;height:340px}.category-feature h3{font-size:2rem;margin-top:8px}.category-feature p{font-size:1rem}.soft-band{background:var(--soft);padding:86px 0}.soft-band.compact{padding:54px 0}.split-feature{display:grid;grid-template-columns:.85fr 1.15fr;gap:64px;align-items:center}.split-feature figure{margin:0}.split-feature img{border-radius:24px;aspect-ratio:4/3;object-fit:cover}.split-feature h2{font-size:clamp(2rem,4vw,3.4rem);line-height:1.08;letter-spacing:-.04em;margin:0 0 16px}.numbered-list{list-style:none;padding:0;margin:28px 0 0}.numbered-list li{display:grid;grid-template-columns:32px 1fr;gap:14px;padding:14px 0;border-top:1px solid rgba(124,92,142,.18)}.numbered-list li>span{color:var(--accent);font-weight:900}.numbered-list a{font-weight:800;text-decoration:none}.numbered-list p{margin:4px 0;color:var(--muted);font-size:.9rem}.topic-preview{padding:90px 0}.topic-ribbon{display:grid;gap:18px}.topic-ribbon article{display:grid;grid-template-columns:.55fr 1.45fr;gap:26px;align-items:center;border-bottom:1px solid var(--line);padding:18px 0}.topic-ribbon img{width:100%;height:180px;object-fit:cover;border-radius:16px}.topic-ribbon h3{font-size:1.55rem;margin:0 0 6px}.topic-ribbon p{margin:0 0 8px;color:var(--muted)}.topic-ribbon a{color:var(--purple);font-weight:750}.dark-band{background:var(--ink);color:#f6f1f7;padding:90px 0}.dark-band .eyebrow{color:#d9b8e2}.brand-bridge{display:grid;grid-template-columns:1.1fr .9fr;gap:58px;align-items:center}.brand-bridge h2,.split-text h2{font-size:clamp(2.1rem,4.6vw,4rem);line-height:1.08;letter-spacing:-.04em;margin:0 0 18px}.brand-bridge p{color:#d5ccd8}.brand-bridge img{border-radius:38px 18px 38px 18px;height:360px;width:100%;object-fit:cover}.support-flow{padding:90px 0}.support-lines{display:grid;grid-template-columns:repeat(3,1fr);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}.support-lines article{padding:28px 26px 30px 0}.support-lines article+article{border-left:1px solid var(--line);padding-left:26px}.support-lines h3{font-size:1.25rem;margin:0 0 8px}.support-lines p{color:var(--muted)}.support-lines a{color:var(--purple);font-weight:750}.notes-section{padding:50px 0 90px;display:grid;grid-template-columns:.65fr 1.35fr;gap:58px}.notes-section h2{font-size:clamp(2rem,4vw,3rem);line-height:1.1;margin:0}.notes-list{display:grid;grid-template-columns:1fr 1fr;gap:0 28px}.notes-list article{border-top:1px solid var(--line);padding:18px 0}.notes-list h3{font-size:1rem;margin:0 0 6px}.notes-list p{font-size:.9rem;color:var(--muted);margin:0}.closing-index{padding:10px 0 100px;display:grid;grid-template-columns:.7fr 1.3fr;gap:52px}.closing-index h2{font-size:clamp(2rem,4vw,3.2rem);line-height:1.1;margin:0 0 14px}.closing-links{display:grid;grid-template-columns:1fr 1fr;border-top:1px solid var(--line);border-left:1px solid var(--line)}.closing-links a{padding:22px;display:grid;text-decoration:none;border-right:1px solid var(--line);border-bottom:1px solid var(--line);min-height:120px}.closing-links span{color:var(--muted);font-size:.9rem}.page-lead{padding:62px 0 38px}.page-lead h1{font-size:clamp(2.3rem,5vw,4.8rem);line-height:1.04;letter-spacing:-.05em;margin:0 0 22px;max-width:14ch}.page-lead p:last-child{font-size:1.08rem;color:#5e5661;max-width:820px}.filter-bar{display:flex;gap:8px;flex-wrap:wrap;padding:10px 0 40px}.filter-bar a{border:1px solid var(--line);padding:8px 13px;border-radius:999px;text-decoration:none;font-size:.9rem}.filter-bar a.active{background:var(--ink);color:#fff;border-color:var(--ink)}.content-cluster{padding:28px 0 72px}.cluster-head{display:grid;grid-template-columns:1.2fr .8fr;gap:50px;align-items:end;margin-bottom:25px}.cluster-head h2{font-size:clamp(1.7rem,3vw,2.8rem);line-height:1.15;margin:0;max-width:24ch}.cluster-head img{height:260px;width:100%;object-fit:cover;border-radius:20px}.article-lines{border-top:1px solid var(--line)}.article-lines article{display:grid;grid-template-columns:160px 1fr 1.2fr auto;gap:18px;align-items:start;padding:24px 0;border-bottom:1px solid var(--line)}.article-lines h3{margin:0;font-size:1.12rem;line-height:1.45}.article-lines h3 a{text-decoration:none}.article-lines p{margin:0;color:var(--muted);font-size:.92rem}.line-meta{display:grid;gap:2px;color:var(--muted);font-size:.78rem}.article-lines>.text-link{white-space:nowrap}.end-note{padding-block:4px}.end-note h2{font-size:2rem;margin:0 0 8px}.end-note p{max-width:820px;color:var(--muted)}.article-page{padding:34px 0 76px}.article-header{display:grid;grid-template-columns:1.15fr .85fr;gap:54px;align-items:end}.article-heading h1{font-size:clamp(2.4rem,5vw,5rem);line-height:1.02;letter-spacing:-.05em;margin:.12em 0 .32em;max-width:12ch}.article-deck{font-size:1.12rem;color:#5b5360;max-width:720px}.article-meta{display:flex;gap:12px;flex-wrap:wrap;color:var(--muted);font-size:.82rem;margin-top:20px}.article-header figure{margin:0}.article-header figure img{width:100%;height:420px;object-fit:cover;border-radius:26px}.article-layout{display:grid;grid-template-columns:250px minmax(0,760px);gap:70px;align-items:start;margin-top:64px}.article-aside{position:sticky;top:110px;border-top:3px solid var(--accent);padding-top:14px;color:var(--muted)}.article-aside strong{display:block;color:var(--ink);margin-bottom:6px}.article-aside a{color:var(--purple);font-weight:750}.article-body section{padding:0 0 36px}.article-body h2{font-size:1.7rem;line-height:1.2;margin:0 0 12px}.article-body p{font-size:1.05rem;margin:0;color:#423c45}.related-section{display:grid;grid-template-columns:.6fr 1.4fr;gap:50px}.related-section h2{font-size:2.2rem;line-height:1.1}.related-list{display:grid}.related-list a{display:grid;grid-template-columns:100px 1fr;gap:6px 14px;padding:16px 0;border-top:1px solid rgba(124,92,142,.2);text-decoration:none}.related-list a span{grid-row:1/3;font-size:.8rem;color:var(--purple);font-weight:800}.related-list strong{font-size:1.05rem}.related-list small{color:var(--muted)}.topic-index-grid{padding:20px 0 90px;display:grid;grid-template-columns:1fr 1fr;gap:28px}.topic-index-grid article{background:#fff;border:1px solid rgba(124,92,142,.12);border-radius:22px;overflow:hidden}.topic-index-grid img{width:100%;height:240px;object-fit:cover}.topic-index-grid article>div{padding:24px}.topic-index-grid h2{font-size:1.65rem;margin:0 0 8px}.topic-index-grid p{color:var(--muted)}.topic-index-grid a{color:var(--purple);font-weight:750}.topic-hero{padding:54px 0 40px;display:grid;grid-template-columns:.7fr 1.3fr;gap:48px;align-items:end}.topic-hero h1{font-size:clamp(2.4rem,5vw,4.6rem);line-height:1.04;margin:0 0 18px}.topic-hero img{border-radius:24px;width:100%;height:360px;object-fit:cover}.topic-sequence{padding:20px 0 90px;display:grid;grid-template-columns:.7fr 1.3fr;gap:48px}.topic-sequence header h2{font-size:2rem;line-height:1.15;margin-top:0}.topic-sequence header p{color:var(--muted)}.topic-sequence ol{list-style:none;margin:0;padding:0;border-top:1px solid var(--line)}.topic-sequence li{display:grid;grid-template-columns:110px 1fr;gap:22px;border-bottom:1px solid var(--line);padding:24px 0}.topic-sequence li>span{color:var(--purple);font-weight:800;font-size:.85rem}.topic-sequence h3{margin:0 0 6px;font-size:1.25rem}.topic-sequence p{margin:0 0 8px;color:var(--muted)}.brand-map{padding:10px 0 90px}.brand-main-note{display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:center}.brand-main-note img{border-radius:24px;width:100%;height:360px;object-fit:cover}.brand-main-note h2{font-size:2.2rem;line-height:1.12}.name-table{margin-top:40px;border-top:1px solid var(--line)}.name-table div{display:grid;grid-template-columns:.6fr 1.4fr;gap:20px;padding:16px 0;border-bottom:1px solid var(--line)}.name-table span{color:var(--muted)}.split-text{display:grid;grid-template-columns:.8fr 1.2fr;gap:60px}.split-text p{color:#d8d0db}.soft-band .split-text p{color:var(--text)}.boundary-section{padding:80px 0}.boundary-section>div:first-child{max-width:680px}.boundary-section h2{font-size:2.7rem;line-height:1.1}.boundary-list{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;margin-top:28px}.boundary-list article{border-top:3px solid var(--purple-soft);padding-top:16px}.boundary-list p{color:var(--muted)}.boundary-list a{color:var(--purple);font-weight:750}.ios-layout{padding:20px 0 90px;display:grid;grid-template-columns:.8fr 1.2fr;gap:60px;align-items:center}.ios-layout figure{margin:0}.ios-layout img{border-radius:32px;max-height:680px;object-fit:cover}.steps h2{font-size:2.4rem;line-height:1.12}.steps ol{padding:0;list-style:none;counter-reset:steps}.steps li{counter-increment:steps;position:relative;padding:18px 0 18px 50px;border-top:1px solid var(--line)}.steps li:before{content:counter(steps,decimal-leading-zero);position:absolute;left:0;color:var(--accent);font-weight:900}.steps li p{margin:5px 0 0;color:var(--muted)}.troubleshoot{display:grid;grid-template-columns:.7fr 1.3fr;gap:60px}.troubleshoot h2{font-size:2.4rem;line-height:1.12;margin-top:0}.trouble-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px}.trouble-grid article{background:rgba(255,255,255,.5);padding:18px;border-radius:14px}.trouble-grid h3{margin:0 0 6px}.trouble-grid p{margin:0;color:var(--muted)}.boundary-cards{padding:30px 0 90px;display:grid;grid-template-columns:repeat(3,1fr);gap:22px}.boundary-cards article{background:#fff;padding:28px;border-radius:20px;border:1px solid rgba(124,92,142,.12)}.boundary-cards h2{font-size:1.4rem}.boundary-cards p{color:var(--muted)}.boundary-cards a{color:var(--purple);font-weight:750}.guide-rail{padding:20px 0 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90px;display:grid;grid-template-columns:1fr 1fr;border-top:1px solid var(--line)}.about-columns article,.privacy-sections article,.safety-matrix article{padding:28px 34px 28px 0;border-bottom:1px solid var(--line)}.about-columns article:nth-child(even),.privacy-sections article:nth-child(even),.safety-matrix article:nth-child(even){padding-left:34px;border-left:1px solid var(--line)}.about-columns h2,.privacy-sections h2,.safety-matrix h2{font-size:1.45rem;margin:0 0 8px}.about-columns p,.privacy-sections p,.safety-matrix p{margin:0;color:var(--muted)}.feedback-guide{padding:20px 0 90px;display:grid;grid-template-columns:repeat(3,1fr);gap:24px}.feedback-guide article{background:#fff;border-radius:20px;padding:26px;border:1px solid rgba(124,92,142,.12)}.feedback-guide h2{font-size:1.4rem}.feedback-guide ul{padding-left:1.2em;color:var(--muted)}.search-page-form{margin-top:28px;max-width:650px}.search-results{padding:20px 0 90px}.result-count{color:var(--muted);margin-bottom:20px}.search-result-list{border-top:1px solid var(--line)}.search-result-list article{display:grid;grid-template-columns:80px .8fr 1.2fr;gap:20px;padding:22px 0;border-bottom:1px solid var(--line)}.search-result-list article>span{color:var(--purple);font-size:.82rem;font-weight:800}.search-result-list h2{font-size:1.18rem;margin:0}.search-result-list h2 a{text-decoration:none}.search-result-list p{margin:0;color:var(--muted)}.empty-state{background:var(--soft);padding:34px;border-radius:20px;max-width:760px}.error-page{padding:100px 0 140px}.error-page h1{font-size:clamp(2.8rem,7vw,5.8rem);line-height:1;margin:.12em 0 .35em}.site-footer{background:#e8e0e9;border-top:1px solid rgba(124,92,142,.14);padding:68px 0 22px}.footer-main{width:var(--shell);margin:auto;display:grid;grid-template-columns:.7fr 1.3fr;gap:70px}.footer-brand h2{font-size:1.5rem;line-height:1.2}.footer-brand 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