/* 蘑菇视频：低饱和菌菇紫 + 暖米白的内容型站点视觉 */
:root{
  --brand:#7C5C8E;
  --brand-soft:#B89ABF;
  --ink:#302C33;
  --ink-strong:#25212A;
  --muted:#726B76;
  --paper:#F8F5F3;
  --panel:#EEE8EF;
  --white:#fff;
  --accent:#D58A45;
  --line:rgba(48,44,51,.14);
  --shadow:0 18px 50px rgba(37,33,42,.09);
  --radius-lg:32px;
  --radius-md:20px;
  --radius-sm:12px;
  --shell:1180px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--paper);color:var(--ink);font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;line-height:1.78;-webkit-font-smoothing:antialiased}
img{display:block;max-width:100%;height:auto}
a{color:inherit;text-decoration:none}
a:hover{color:var(--brand)}
button,input{font:inherit}
button{cursor:pointer}
code{padding:.12em .34em;border-radius:6px;background:rgba(124,92,142,.09);font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:.92em}
.shell{width:min(calc(100% - 40px),var(--shell));margin-inline:auto}
.skip-link{position:fixed;z-index:9999;left:20px;top:10px;transform:translateY(-160%);padding:10px 16px;border-radius:10px;background:var(--ink-strong);color:#fff}
.skip-link:focus{transform:translateY(0)}
.site-header{position:sticky;top:0;z-index:80;border-bottom:1px solid rgba(48,44,51,.08);background:rgba(248,245,243,.92);backdrop-filter:blur(16px)}
.header-inner{min-height:76px;display:grid;grid-template-columns:auto 1fr auto;align-items:center;gap:24px}
.brand-mark{display:flex;align-items:center;gap:11px;min-width:max-content}
.brand-mark img{width:44px;height:44px;object-fit:contain;border-radius:12px}
.brand-mark span{display:grid;line-height:1.15}
.brand-mark strong{font-size:18px;color:var(--ink-strong);letter-spacing:.03em}
.brand-mark small{margin-top:5px;color:var(--muted);font-size:11px;letter-spacing:.06em}
.primary-nav{display:flex;justify-content:center;gap:4px}
.primary-nav a{padding:10px 13px;border-radius:999px;color:var(--muted);font-size:14px;white-space:nowrap}
.primary-nav a:hover,.primary-nav a[aria-current="page"]{background:var(--panel);color:var(--ink-strong)}
.search-open,.menu-toggle{border:1px solid var(--line);border-radius:999px;background:transparent;color:var(--ink-strong);padding:10px 16px}
.search-open:hover,.menu-toggle:hover{background:var(--ink-strong);color:#fff}
.menu-toggle{display:none}
.breadcrumb{display:flex;align-items:center;gap:9px;padding-top:18px;color:var(--muted);font-size:13px}
.breadcrumb a:hover{color:var(--brand)}
.eyebrow{margin:0 0 12px;color:var(--brand);font-size:13px;font-weight:700;letter-spacing:.13em;text-transform:uppercase}
h1,h2,h3,p{margin-top:0}
h1,h2,h3{color:var(--ink-strong);line-height:1.2;letter-spacing:-.02em}
h1{font-size:clamp(38px,5vw,70px)}
h2{font-size:clamp(26px,3vw,42px)}
h3{font-size:22px}
p{color:var(--muted)}
.button{display:inline-flex;align-items:center;justify-content:center;min-height:46px;padding:11px 18px;border-radius:999px;border:1px solid transparent;font-weight:700;font-size:14px}
.button.primary{background:var(--brand);color:#fff;box-shadow:0 12px 28px rgba(124,92,142,.22)}
.button.primary:hover{background:#6f517f;color:#fff}
.button.ghost{border-color:var(--line);background:rgba(255,255,255,.45);color:var(--ink-strong)}
.button.ghost:hover{border-color:var(--brand);color:var(--brand)}
.text-link{display:inline-flex;align-items:center;font-weight:700;color:var(--brand)}
.tag{display:inline-flex;padding:5px 10px;border-radius:999px;background:var(--panel);color:var(--brand);font-size:12px;font-weight:700;letter-spacing:.04em}
.section{padding:88px 0}
.section-tight{padding:58px 0 26px}
.muted-band{background:var(--panel)}
.dark-band{background:var(--ink-strong);color:#fff}
.dark-band h2,.dark-band h3,.dark-band strong{color:#fff}
.dark-band p{color:rgba(255,255,255,.68)}
.soft-panel-section{padding:70px 0}
.home-lead{padding:62px 0 42px;overflow:hidden}
.lead-grid{display:grid;grid-template-columns:1.02fr .98fr;gap:56px;align-items:center}
.lead-copy{padding:38px 0}
.lead-copy h1{max-width:820px;margin-bottom:22px}
.lead-text{max-width:720px;font-size:18px}
.lead-actions{display:flex;flex-wrap:wrap;gap:12px;margin:30px 0}
.lead-notes{display:flex;flex-wrap:wrap;gap:20px 34px;margin:34px 0 0}
.lead-notes div{display:grid;gap:4px}
.lead-notes dt{color:var(--muted);font-size:12px}
.lead-notes dd{margin:0;color:var(--ink-strong);font-weight:700}
.lead-media{position:relative;margin:0;padding:12px;background:var(--panel);border-radius:40px 40px 120px 40px;box-shadow:var(--shadow)}
.lead-media img{width:100%;aspect-ratio:1.1/1;object-fit:cover;border-radius:30px 30px 110px 30px}
.lead-media figcaption{position:absolute;right:20px;bottom:20px;max-width:230px;padding:12px 15px;border-radius:14px;background:rgba(37,33,42,.84);color:#fff;font-size:12px;backdrop-filter:blur(8px)}
.editorial-line{display:grid;grid-template-columns:1.1fr .9fr;gap:70px;align-items:end;border-top:1px solid var(--line);padding-top:34px}
.editorial-line h2{margin-bottom:0;font-size:clamp(29px,3.5vw,48px)}
.editorial-line>p{margin-bottom:4px}
.track-list{display:grid;gap:18px}
.track-item{display:grid;grid-template-columns:38% 1fr;gap:0;min-height:290px;border-top:1px solid var(--line);opacity:.75;transform:translateY(8px);transition:.45s ease}
.track-item.is-visible{opacity:1;transform:none}
.track-item.is-featured{grid-template-columns:48% 1fr;min-height:350px}
.track-image{overflow:hidden;margin:26px 0}
.track-image img{width:100%;height:100%;min-height:238px;object-fit:cover;border-radius:var(--radius-md)}
.track-copy{display:flex;flex-direction:column;justify-content:center;padding:34px 4% 34px 6%}
.track-copy h2{margin:14px 0 12px;font-size:clamp(24px,2.7vw,38px)}
.track-copy p{max-width:650px}
.split-story{display:grid;grid-template-columns:1fr 1fr;gap:70px;align-items:center}
.split-copy h2{margin-bottom:18px}
.split-copy>p:not(.eyebrow){font-size:17px}
.split-copy .button{margin-top:10px}
.split-media{margin:0}
.split-media img{width:100%;border-radius:var(--radius-lg);object-fit:cover;box-shadow:var(--shadow)}
.offset-media{transform:translateY(24px)}
.two-column-index{display:grid;grid-template-columns:.84fr 1.16fr;gap:70px;align-items:start}
.index-intro{position:sticky;top:120px}
.alias-list{border-top:1px solid var(--line)}
.alias-row{display:grid;grid-template-columns:150px 1fr;gap:22px;padding:24px 0;border-bottom:1px solid var(--line)}
.alias-row strong{font-size:20px;color:var(--ink-strong)}
.alias-row p{margin:0}
.dark-grid{display:grid;grid-template-columns:.78fr 1.22fr;gap:70px;align-items:start}
.numbered-list{list-style:none;margin:0;padding:0;counter-reset:steps}
.numbered-list li{position:relative;padding:22px 0 22px 78px;border-top:1px solid rgba(255,255,255,.12);counter-increment:steps}
.numbered-list li:before{content:"0" counter(steps);position:absolute;left:0;top:18px;color:var(--accent);font-size:28px;font-weight:700}
.numbered-list li:last-child{border-bottom:1px solid rgba(255,255,255,.12)}
.numbered-list strong{font-size:20px}
.numbered-list p{margin:5px 0 0}
.feature-spread{display:grid;grid-template-columns:1fr 1fr;gap:64px;align-items:center}
.feature-spread>img,.feature-spread>figure img{width:100%;border-radius:var(--radius-lg);object-fit:cover}
.feature-spread figure{margin:0}
.reading-list{display:grid;border-top:1px solid var(--line)}
.reading-list a{display:grid;gap:4px;padding:18px 0;border-bottom:1px solid var(--line)}
.reading-list strong{font-size:17px}
.reading-list span{color:var(--muted);font-size:13px}
.ios-brief{display:grid;grid-template-columns:1.2fr .8fr;gap:50px;align-items:center;padding:50px;border-radius:34px;background:#fff;box-shadow:var(--shadow)}
.ios-brief img{border-radius:24px}
.home-guides{display:grid;grid-template-columns:.82fr 1.18fr;gap:64px}
.guide-links{display:grid;border-top:1px solid var(--line)}
.guide-links a{display:grid;grid-template-columns:130px 1fr;gap:20px;padding:22px 0;border-bottom:1px solid var(--line)}
.guide-links span{color:var(--brand);font-size:13px;font-weight:700}
.guide-links strong{font-size:18px}
.weak-topic{padding:50px 0;background:rgba(184,154,191,.18)}
.weak-topic-inner{display:flex;justify-content:space-between;gap:60px;align-items:center}
.weak-topic-inner>div:first-child{max-width:800px}
.final-index{padding:90px 0 108px}
.final-index-grid{display:grid;grid-template-columns:.82fr 1.18fr;gap:64px}
.final-links{display:grid}
.final-links a{padding:18px 0;border-bottom:1px solid var(--line);font-size:18px;font-weight:700}
.page-hero{padding:74px 0 50px}
.compact-hero{padding-bottom:70px}
.narrow-hero{padding-bottom:24px}
.page-title-wrap{max-width:900px}
.page-title-wrap.narrow{max-width:790px}
.page-title-wrap h1{margin-bottom:22px}
.page-title-wrap>p:last-child{max-width:760px;font-size:18px}
.image-strip-hero img{width:100%;max-height:480px;object-fit:cover;border-radius:30px;margin-top:34px}
.choice-lanes{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.choice-lanes article{min-height:300px;padding:28px;border:1px solid var(--line);border-radius:var(--radius-md);background:rgba(255,255,255,.55);opacity:.75;transform:translateY(8px);transition:.45s ease}
.choice-lanes article.is-visible{opacity:1;transform:none}
.choice-lanes article>span{color:var(--accent);font-weight:800}
.choice-lanes h2{font-size:28px;margin:42px 0 14px}
.method-grid{display:grid;grid-template-columns:.72fr 1.28fr;gap:70px}
.step-list{margin:0;padding:0;list-style:none;border-top:1px solid var(--line)}
.step-list li{display:grid;grid-template-columns:180px 1fr;gap:22px;padding:20px 0;border-bottom:1px solid var(--line)}
.step-list p{margin:0}
.inline-links{display:flex;flex-wrap:wrap;gap:10px;margin-top:22px}
.inline-links a{padding:8px 12px;border-radius:999px;background:var(--panel);color:var(--brand);font-weight:700;font-size:13px}
.editorial-grid{display:grid;grid-template-columns:1.45fr .55fr;gap:24px}
.editorial-lead{display:grid;grid-template-columns:1.1fr .9fr;gap:26px;padding:20px;border-radius:var(--radius-lg);background:#fff;box-shadow:var(--shadow)}
.editorial-lead img{width:100%;height:100%;min-height:390px;object-fit:cover;border-radius:22px}
.editorial-lead>div{padding:26px 16px 26px 8px;align-self:center}
.editorial-aside{padding:26px;border:1px solid var(--line);border-radius:var(--radius-lg)}
.editorial-aside h2{font-size:24px}
.editorial-aside a{display:grid;gap:4px;padding:17px 0;border-bottom:1px solid var(--line)}
.editorial-aside a:last-child{border-bottom:0}
.editorial-aside span{color:var(--muted);font-size:13px}
.article-index{display:grid;grid-template-columns:.7fr 1.3fr;gap:60px}
.article-list{display:grid}
.article-list>a{display:grid;grid-template-columns:120px 1fr;column-gap:18px;padding:20px 0;border-top:1px solid var(--line);opacity:.75;transform:translateY(6px);transition:.45s ease}
.article-list>a.is-visible{opacity:1;transform:none}
.article-list span{grid-row:1/3;color:var(--brand);font-size:12px;font-weight:700}
.article-list strong{font-size:18px}
.article-list p{margin:5px 0 0;font-size:14px}
.decision-table{display:grid;grid-template-columns:.7fr 1.3fr;gap:50px;align-items:start}
.table-scroll{overflow-x:auto}
table{width:100%;border-collapse:collapse;min-width:680px}
th,td{text-align:left;padding:16px 14px;border-bottom:1px solid var(--line)}
th{font-size:12px;color:var(--muted);letter-spacing:.04em}
td a{color:var(--brand);font-weight:700}
.three-points{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.three-points article{padding:28px;border-top:3px solid var(--brand);background:#fff;border-radius:0 0 20px 20px}
.three-points span{font-size:12px;color:var(--accent);font-weight:800}
.three-points h2{font-size:25px;margin-top:30px}
.related-paths{display:grid;grid-template-columns:1.1fr repeat(3,.63fr);gap:20px;align-items:stretch}
.related-paths>a{display:flex;flex-direction:column;justify-content:space-between;gap:20px;padding:22px;border:1px solid var(--line);border-radius:18px}
.related-paths span{color:var(--muted);font-size:13px}
.movie-filter-copy{display:grid;grid-template-columns:repeat(3,1fr);gap:40px}
.big-num{display:block;margin-bottom:20px;color:var(--brand-soft);font-size:54px;font-weight:800;line-height:1}
.movie-filter-copy h2{font-size:26px}
.dark-links{display:grid;border-top:1px solid rgba(255,255,255,.16)}
.dark-links a{padding:17px 0;border-bottom:1px solid rgba(255,255,255,.16);color:#fff;font-weight:700}
.short-layout{display:grid;grid-template-columns:.72fr 1.28fr;gap:70px;align-items:start}
.short-layout figure{margin:0;position:sticky;top:110px}
.short-layout figure img{width:100%;border-radius:120px 28px 28px 28px;object-fit:cover}
.short-copy{border-top:1px solid var(--line)}
.short-copy>div{padding:30px 0;border-bottom:1px solid var(--line)}
.short-copy span{color:var(--accent);font-size:12px;font-weight:800}
.short-copy h2{margin:8px 0 12px;font-size:30px}
.brand-hero-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:56px;align-items:center}
.brand-hero-grid img{border-radius:30px}
.brand-facts{display:grid;grid-template-columns:1.15fr .85fr;gap:22px}
.fact-main{padding:38px;border-radius:var(--radius-lg);background:var(--ink-strong);color:#fff}
.fact-main span{display:block;color:rgba(255,255,255,.62);font-size:13px}
.fact-main strong{display:block;margin:26px 0 14px;font-size:clamp(28px,4vw,50px);word-break:break-word}
.fact-main p{color:rgba(255,255,255,.7)}
.fact-side{padding:36px;border:1px solid var(--line);border-radius:var(--radius-lg)}
.fact-side h2{font-size:22px}
.alias-detail{display:grid;grid-template-columns:.8fr 1.2fr;column-gap:60px}
.alias-detail>div{grid-row:1/5}
.alias-detail article{padding:22px 0;border-top:1px solid var(--line)}
.alias-detail article strong{font-size:20px}
.alias-detail article p{margin:6px 0 0}
.caution-note{display:grid;grid-template-columns:1fr 1fr;gap:22px}
.caution-note>div{padding:30px;border:1px solid var(--line);border-radius:var(--radius-md)}
.caution-note h2{font-size:26px}
.ios-steps{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.ios-steps article{padding:28px;border-radius:22px;background:#fff;box-shadow:var(--shadow)}
.ios-steps span{display:inline-flex;width:44px;height:44px;align-items:center;justify-content:center;border-radius:50%;background:var(--panel);color:var(--brand);font-weight:800}
.ios-steps h2{font-size:25px;margin-top:34px}
.troubleshooting{display:grid;grid-template-columns:.7fr 1.3fr;gap:60px}
.troubleshooting dl{margin:0}
.troubleshooting dl>div{display:grid;grid-template-columns:220px 1fr;gap:20px;padding:18px 0;border-top:1px solid var(--line)}
.troubleshooting dt{font-weight:800;color:var(--ink-strong)}
.troubleshooting dd{margin:0;color:var(--muted)}
.boundary-grid{display:grid;grid-template-columns:1.2fr .8fr;gap:28px}
.boundary-main{padding:38px;border-radius:var(--radius-lg);background:#fff}
.boundary-grid aside{padding:34px;border-radius:var(--radius-lg);background:var(--panel)}
.boundary-grid aside strong{font-size:22px}
.boundary-grid li{margin:10px 0;color:var(--muted)}
.verification-list{display:grid;grid-template-columns:.72fr 1.28fr;gap:60px}
.verification-list ol{margin:0;padding-left:22px}
.verification-list li{padding:12px 0 18px;border-bottom:1px solid var(--line)}
.verification-list li::marker{color:var(--accent);font-weight:800}
.verification-list p{margin:5px 0 0}
.guide-timeline{max-width:900px}
.guide-timeline article{display:grid;grid-template-columns:70px 1fr;gap:26px;padding:28px 0;border-bottom:1px solid var(--line)}
.guide-timeline article>span{display:flex;width:54px;height:54px;align-items:center;justify-content:center;border-radius:50%;background:var(--brand);color:#fff;font-weight:800}
.guide-timeline h2{font-size:27px;margin-bottom:8px}
.support-index{display:grid;grid-template-columns:.75fr 1.25fr;column-gap:60px}
.support-index>div{grid-row:1/5}
.support-index>a{display:grid;grid-template-columns:1fr 180px;gap:18px;padding:20px 0;border-top:1px solid var(--line)}
.support-index span{color:var(--brand);font-size:13px;text-align:right}
.faq-layout{display:grid;grid-template-columns:.7fr 1.3fr;gap:60px;align-items:start}
.faq-intro{position:sticky;top:110px}
.faq-intro img{border-radius:28px;margin-bottom:26px}
.faq-list{border-top:1px solid var(--line)}
.faq-item{border-bottom:1px solid var(--line)}
.faq-item button{width:100%;display:flex;justify-content:space-between;gap:20px;text-align:left;padding:22px 0;border:0;background:transparent;color:var(--ink-strong);font-weight:800;font-size:18px}
.faq-item button span:last-child{color:var(--brand)}
.faq-answer{padding:0 42px 22px 0}
.faq-answer[hidden]{display:none}
.about-grid,.contact-grid,.policy-grid{display:grid;grid-template-columns:.88fr 1.12fr;gap:60px;align-items:start}
.about-grid img,.contact-grid img,.policy-grid img{border-radius:28px}
.about-grid h2,.contact-grid h2,.policy-grid h2{font-size:26px;margin-top:28px}
.about-grid h2:first-child,.contact-grid h2:first-child,.policy-grid h2:first-child{margin-top:0}
.principles{display:grid;grid-template-columns:.72fr 1.28fr;gap:60px}
.principles ul{margin:0;padding:0;list-style:none}
.principles li{padding:18px 0;border-top:1px solid var(--line);color:var(--ink)}
.policy-grid aside p{font-size:13px;margin-top:16px}
.safety-checks{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
.safety-checks article{padding:24px;border-radius:20px;background:#fff;border:1px solid var(--line)}
.safety-checks strong{display:block;margin-bottom:18px;color:var(--brand);font-size:18px}
.search-page-hero{padding-bottom:35px}
.search-page-form{max-width:720px;margin-top:30px}
.search-page-form label{display:block;margin-bottom:8px;color:var(--muted);font-size:13px}
.search-page-form>div{display:grid;grid-template-columns:1fr auto;gap:10px}
.search-page-form input,.search-form input{min-width:0;border:1px solid var(--line);border-radius:14px;background:#fff;padding:13px 15px;outline:none}
.search-page-form input:focus,.search-form input:focus{border-color:var(--brand);box-shadow:0 0 0 3px rgba(124,92,142,.12)}
.search-page-form button,.search-form button{border:0;border-radius:14px;background:var(--brand);color:#fff;padding:0 20px;font-weight:800}
.search-count{margin-bottom:20px;color:var(--muted);font-size:13px}
.result-list{display:grid;grid-template-columns:repeat(2,1fr);gap:16px}
.result-list article{padding:26px;border:1px solid var(--line);border-radius:20px;background:#fff}
.result-list h2{font-size:23px}
.empty-state{padding:48px;border-radius:26px;background:var(--panel)}
.empty-state h2{font-size:28px}
.article-hero{padding:58px 0 44px}
.article-hero-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:58px;align-items:center}
.article-hero h1{font-size:clamp(38px,4.6vw,62px);margin:16px 0 18px}
.article-deck{font-size:18px}
.article-meta{margin-top:22px;color:var(--muted);font-size:13px}
.article-hero figure{margin:0}
.article-hero img{width:100%;border-radius:30px}
.article-body-section{padding-top:40px}
.article-body{display:grid;grid-template-columns:minmax(0,1fr) 300px;gap:70px;align-items:start}
.article-content{max-width:760px}
.article-content section{padding:0 0 36px;margin-bottom:36px;border-bottom:1px solid var(--line)}
.article-content h2{font-size:31px}
.article-content p{font-size:17px;color:#514b55}
.article-aside{position:sticky;top:110px;padding:24px;border-radius:22px;background:var(--panel)}
.article-aside h2{font-size:20px}
.article-aside a{display:grid;gap:5px;padding:14px 0;border-top:1px solid rgba(48,44,51,.12)}
.article-aside strong{font-size:14px}
.article-aside span{color:var(--muted);font-size:12px}
.not-found{min-height:62vh;display:flex;align-items:center;padding:70px 0;text-align:center}
.not-found-code{font-size:clamp(90px,16vw,190px);line-height:.8;color:var(--brand-soft);font-weight:900;letter-spacing:-.08em}
.not-found h1{font-size:40px;margin:30px 0 12px}
.not-found p{max-width:680px;margin:0 auto 26px}
.not-found-links{display:flex;justify-content:center;flex-wrap:wrap;gap:12px}
.site-footer{padding:70px 0 24px;background:var(--ink-strong);color:#fff}
.footer-grid{display:grid;grid-template-columns:1.6fr repeat(3,1fr);gap:46px}
.footer-brand{font-size:28px;font-weight:800;margin-bottom:14px}
.footer-intro p{max-width:440px;color:rgba(255,255,255,.62)}
.footer-grid h2{font-size:14px;color:#fff;margin-bottom:16px}
.footer-grid>div:not(.footer-intro){display:flex;flex-direction:column;gap:10px}
.footer-grid a{color:rgba(255,255,255,.65);font-size:14px}
.footer-grid a:hover{color:#fff}
.footer-bottom{display:flex;justify-content:space-between;gap:20px;margin-top:46px;padding-top:20px;border-top:1px solid rgba(255,255,255,.12);color:rgba(255,255,255,.45);font-size:12px}
.search-modal[hidden]{display:none !important}
.search-modal{position:fixed;inset:0;z-index:120;display:grid;place-items:start center;padding:12vh 20px 20px}
.search-backdrop{position:absolute;inset:0;background:rgba(37,33,42,.64);backdrop-filter:blur(8px)}
.search-panel{position:relative;z-index:1;width:min(680px,100%);padding:34px;border-radius:26px;background:var(--paper);box-shadow:0 30px 80px rgba(0,0,0,.25)}
.search-panel h2{margin-bottom:8px}
.search-close{position:absolute;right:20px;top:18px;border:0;background:transparent;color:var(--muted)}
.search-form label{display:block;margin-bottom:8px;font-size:13px;color:var(--muted)}
.search-row{display:grid;grid-template-columns:1fr auto;gap:10px}
.modal-open{overflow:hidden}
.back-top{position:fixed;right:22px;bottom:22px;z-index:60;width:44px;height:44px;border:0;border-radius:50%;background:var(--brand);color:#fff;box-shadow:var(--shadow);font-size:18px}
.back-top[hidden]{display:none}
@media (max-width:1080px){
  .primary-nav a{padding:9px 9px;font-size:13px}
  .lead-grid,.split-story,.feature-spread,.two-column-index,.dark-grid,.home-guides,.final-index-grid,.article-hero-grid{gap:42px}
  .related-paths{grid-template-columns:1fr 1fr}
  .related-paths>div{grid-column:1/-1}
  .footer-grid{grid-template-columns:1.4fr repeat(3,1fr);gap:28px}
}
@media (max-width:900px){
  .header-inner{grid-template-columns:auto auto auto;justify-content:space-between;gap:12px}
  .menu-toggle{display:inline-flex}
  .primary-nav{position:absolute;left:20px;right:20px;top:68px;display:none;flex-direction:column;padding:14px;border:1px solid var(--line);border-radius:18px;background:var(--paper);box-shadow:var(--shadow)}
  .primary-nav[data-open="true"]{display:flex}
  .primary-nav a{padding:12px 14px}
  .lead-grid,.editorial-line,.split-story,.two-column-index,.dark-grid,.feature-spread,.ios-brief,.home-guides,.final-index-grid,.method-grid,.article-index,.decision-table,.short-layout,.brand-hero-grid,.brand-facts,.alias-detail,.troubleshooting,.verification-list,.support-index,.faq-layout,.about-grid,.contact-grid,.policy-grid,.article-hero-grid,.article-body{grid-template-columns:1fr}
  .lead-media{max-width:650px}
  .editorial-line{align-items:start}
  .index-intro,.short-layout figure,.faq-intro,.article-aside{position:static}
  .choice-lanes,.three-points,.movie-filter-copy,.ios-steps,.safety-checks{grid-template-columns:1fr 1fr}
  .editorial-grid{grid-template-columns:1fr}
  .editorial-lead{grid-template-columns:1fr 1fr}
  .article-index .section-heading,.support-index>div,.alias-detail>div{grid-row:auto}
  .article-list>a{grid-template-columns:105px 1fr}
  .footer-grid{grid-template-columns:1fr 1fr}
  .article-aside{display:grid;grid-template-columns:repeat(2,1fr);gap:0 18px}
  .article-aside h2{grid-column:1/-1}
}
@media (max-width:720px){
  .shell{width:min(calc(100% - 28px),var(--shell))}
  .section{padding:64px 0}
  .home-lead{padding-top:34px}
  h1{font-size:clamp(34px,11vw,50px)}
  h2{font-size:clamp(25px,8vw,34px)}
  .brand-mark small{display:none}
  .search-open{display:none}
  .header-inner{grid-template-columns:auto auto}
  .lead-notes{display:grid;grid-template-columns:1fr 1fr}
  .lead-media{border-radius:30px 30px 80px 30px}
  .lead-media img{border-radius:22px 22px 70px 22px}
  .track-item,.track-item.is-featured{grid-template-columns:1fr}
  .track-image{margin:20px 0 0}
  .track-copy{padding:24px 0 34px}
  .offset-media{transform:none}
  .alias-row{grid-template-columns:1fr;gap:4px}
  .ios-brief{padding:30px}
  .weak-topic-inner{align-items:flex-start;flex-direction:column;gap:22px}
  .choice-lanes,.three-points,.movie-filter-copy,.ios-steps,.safety-checks{grid-template-columns:1fr}
  .editorial-lead{grid-template-columns:1fr}
  .editorial-lead>div{padding:8px}
  .step-list li,.troubleshooting dl>div{grid-template-columns:1fr;gap:6px}
  .article-list>a{grid-template-columns:1fr}
  .article-list span{grid-row:auto}
  .related-paths{grid-template-columns:1fr}
  .short-layout figure img{border-radius:70px 22px 22px 22px}
  .caution-note{grid-template-columns:1fr}
  .support-index>a{grid-template-columns:1fr;gap:4px}
  .support-index span{text-align:left}
  .article-hero{padding-top:38px}
  .article-aside{grid-template-columns:1fr}
  .result-list{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr 1fr}
  .footer-intro{grid-column:1/-1}
  .footer-bottom{flex-direction:column}
}
@media (max-width:520px){
  .lead-actions,.not-found-links{align-items:stretch;flex-direction:column}
  .lead-notes{grid-template-columns:1fr}
  .guide-links a{grid-template-columns:1fr;gap:6px}
  .article-list>a{padding:18px 0}
  .ios-brief{padding:24px}
  .search-panel{padding:28px 20px}
  .search-row,.search-page-form>div{grid-template-columns:1fr}
  .search-form button,.search-page-form button{min-height:46px}
  .footer-grid{grid-template-columns:1fr}
  .footer-intro{grid-column:auto}
}