:root {
  --primary:#6C4FF8;
  --primary-soft:#9B8AFB;
  --ink:#1E1B2E;
  --text:#252331;
  --muted:#716E7E;
  --bg:#F7F6FB;
  --surface:#FFFFFF;
  --soft:#EEEAF8;
  --accent:#F06A8A;
  --line:#DCD7EC;
  --shadow:0 18px 50px rgba(30,27,46,.08);
  --radius:24px;
  --max:1180px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;background:var(--bg);color:var(--text);line-height:1.78}
img{max-width:100%;height:auto;display:block;border-radius:20px;object-fit:cover}
a{color:inherit;text-decoration:none}
a:hover{color:var(--primary)}
button,input,select,textarea{font:inherit}
.skip-link{position:absolute;left:16px;top:-80px;background:var(--ink);color:#fff;padding:10px 16px;border-radius:10px;z-index:1000}
.skip-link:focus{top:16px}
.site-header{position:sticky;top:0;z-index:50;background:rgba(247,246,251,.94);backdrop-filter:blur(14px);border-bottom:1px solid rgba(220,215,236,.82)}
.header-inner{max-width:var(--max);margin:0 auto;min-height:76px;padding:12px 24px;display:flex;align-items:center;gap:28px}
.brand{display:flex;align-items:center;gap:12px;min-width:max-content}
.brand img{width:44px;height:44px;border-radius:12px}
.brand span{display:grid;line-height:1.2}.brand strong{font-size:18px;color:var(--ink)}.brand small{font-size:12px;color:var(--muted);margin-top:4px}
.site-nav{margin-left:auto;display:flex;align-items:center;gap:6px;flex-wrap:wrap;justify-content:flex-end}
.site-nav a{padding:9px 13px;border-radius:999px;color:var(--muted);font-size:14px;font-weight:650}
.site-nav a[aria-current="page"]{background:var(--soft);color:var(--ink)}
.menu-toggle{display:none;margin-left:auto;border:1px solid var(--line);background:#fff;padding:8px 12px;border-radius:10px;color:var(--ink)}
main{min-height:70vh}
.hero{max-width:var(--max);margin:0 auto;padding:82px 24px 52px;display:grid;grid-template-columns:minmax(0,1.05fr) minmax(380px,.95fr);gap:56px;align-items:center}
.eyebrow,.section-kicker{font-size:13px;letter-spacing:.12em;text-transform:uppercase;color:var(--primary);font-weight:800}
h1,h2,h3{color:var(--ink);line-height:1.22;margin-top:0}h1{font-size:clamp(42px,6vw,72px);letter-spacing:-.045em;margin-bottom:22px}h2{font-size:clamp(28px,4vw,44px);letter-spacing:-.03em;margin-bottom:18px}h3{font-size:21px}
.hero-lead,.page-intro p{font-size:18px;color:var(--muted);max-width:760px}.hero-actions{display:flex;gap:12px;flex-wrap:wrap;margin:30px 0}
.button{display:inline-flex;align-items:center;justify-content:center;padding:13px 18px;border-radius:14px;font-weight:800;transition:.2s transform,.2s box-shadow}
.button:hover{transform:translateY(-1px)}.button-primary{background:var(--primary);color:#fff;box-shadow:0 10px 24px rgba(108,79,248,.24)}.button-primary:hover{color:#fff}.button-secondary{background:var(--surface);border:1px solid var(--line);color:var(--ink)}
.quick-facts{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin-top:22px}.quick-facts a{padding:15px;border:1px solid var(--line);border-radius:16px;background:rgba(255,255,255,.7)}.quick-facts span,.quick-facts strong{display:block}.quick-facts span{font-size:12px;color:var(--muted)}.quick-facts strong{font-size:14px;margin-top:5px}
.hero-media{margin:0;background:linear-gradient(145deg,var(--soft),#fff);padding:16px;border:1px solid var(--line);border-radius:30px;box-shadow:var(--shadow)}.hero-media figcaption{font-size:13px;color:var(--muted);padding:12px 5px 2px}
.reading-section,.split-section,.device-strip,.compact-section,.index-section,.article-flow,.topic-articles,.related-panel,.official-layout,.three-note-grid,.device-detail-list,.media-note,.faq-section,.support-grid,.not-found{max-width:var(--max);margin:0 auto;padding-left:24px;padding-right:24px}
.reading-section{padding-top:70px;padding-bottom:78px}.story-grid{display:grid;grid-template-columns:1.25fr .75fr;gap:42px}.story-main{font-size:18px}.story-main p{margin-top:0}.story-note{background:var(--soft);padding:14px;border-radius:22px}.story-note p{color:var(--muted);font-size:14px;margin:13px 4px 4px}
.text-link{font-weight:800;color:var(--primary)}
.split-section{padding-top:62px;padding-bottom:62px;border-top:1px solid var(--line);border-bottom:1px solid var(--line);display:grid;grid-template-columns:1fr 1fr;gap:54px}.split-content{font-size:18px;color:var(--muted)}
.device-strip{padding-top:82px;padding-bottom:82px}.device-strip__intro{max-width:820px}.device-strip__intro p{font-size:18px;color:var(--muted)}.device-strip__cards{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;margin:34px 0 28px}.device-card{background:var(--surface);border:1px solid var(--line);border-radius:20px;padding:12px 12px 18px}.device-card h3{margin:16px 6px 6px}.device-card p{color:var(--muted);margin:0 6px;font-size:14px}
.compact-section{padding-top:64px;padding-bottom:64px;display:grid;grid-template-columns:1fr 1fr;gap:60px;background:var(--ink);color:#fff;max-width:none}.compact-section>div{max-width:560px}.compact-section>div:first-child{margin-left:auto}.compact-section h2{color:#fff}.compact-copy p{color:#c9c5d8;font-size:17px}.compact-section .text-link{color:#cfc7ff}
.index-section{padding-top:76px;padding-bottom:90px}.topic-list{display:grid;gap:10px}.topic-link{display:grid;grid-template-columns:minmax(220px,.42fr) minmax(0,1fr) 30px;gap:18px;align-items:center;padding:18px 20px;background:var(--surface);border:1px solid var(--line);border-radius:16px}.topic-link__title{font-weight:800;color:var(--ink)}.topic-link__desc{color:var(--muted);font-size:14px}.topic-link__arrow{font-size:22px;color:var(--primary)}
.breadcrumb{max-width:var(--max);margin:0 auto;padding:24px 24px 0}.breadcrumb ol{display:flex;gap:8px;list-style:none;padding:0;margin:0;color:var(--muted);font-size:13px}.breadcrumb li+li:before{content:"/";margin-right:8px;color:#aaa}
.page-intro{max-width:var(--max);margin:0 auto;padding:52px 24px 48px;display:grid;grid-template-columns:1.1fr .9fr;gap:44px;align-items:center}.page-intro--plain{grid-template-columns:1fr}.page-intro h1{font-size:clamp(38px,5vw,64px)}
.article-flow{padding-top:54px;padding-bottom:54px;max-width:930px;font-size:17px}.check-grid{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin-top:28px}.check-grid div{padding:18px;background:var(--surface);border:1px solid var(--line);border-radius:16px}.check-grid strong,.check-grid span{display:block}.check-grid span{color:var(--muted);font-size:14px;margin-top:5px}
.topic-articles{display:grid;grid-template-columns:1fr 1fr;gap:18px;padding-top:20px;padding-bottom:70px}.topic-articles article{background:var(--surface);border:1px solid var(--line);border-radius:20px;padding:26px}.topic-articles article:nth-child(3n){background:var(--soft)}.article-summary{font-weight:700;color:var(--primary)}
.related-panel{padding-top:62px;padding-bottom:82px}.related-links{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}.related-links a{background:var(--surface);border:1px solid var(--line);border-radius:16px;padding:18px}.related-links strong,.related-links span{display:block}.related-links span{color:var(--muted);font-size:14px;margin-top:6px}
.official-layout{display:grid;grid-template-columns:1.1fr .7fr;gap:48px;padding-top:20px;padding-bottom:70px}.numbered-list{display:grid;gap:12px}.numbered-list article{display:grid;grid-template-columns:52px 1fr;gap:14px;padding:20px;background:var(--surface);border:1px solid var(--line);border-radius:18px}.numbered-list article>span{font-weight:900;color:var(--primary);font-size:22px}.numbered-list p{margin:0;color:var(--muted)}.official-aside{display:grid;gap:16px}.aside-box{padding:20px;background:var(--ink);color:#fff;border-radius:18px}.aside-box p{color:#cdc8db}.aside-box a{color:#d9d2ff;font-weight:800}
.three-note-grid{padding-top:10px;padding-bottom:80px;display:grid;grid-template-columns:repeat(3,1fr);gap:14px}.three-note-grid article{padding:24px;border-top:3px solid var(--primary);background:var(--surface)}.three-note-grid p{color:var(--muted)}
.device-detail-list{padding-top:10px;padding-bottom:30px}.device-detail{display:grid;grid-template-columns:.9fr 1.1fr;gap:52px;align-items:center;padding:38px 0;border-bottom:1px solid var(--line)}.device-detail--reverse .device-detail__media{order:2}.device-detail__copy p{font-size:17px;color:var(--muted)}.device-detail__copy ul{padding-left:20px}.device-detail__copy li{margin:8px 0}
.media-note{display:grid;grid-template-columns:.8fr 1.2fr;gap:46px;align-items:center;padding-top:36px;padding-bottom:84px}.media-note p{font-size:17px;color:var(--muted)}
.faq-section{padding-top:20px;padding-bottom:56px;max-width:930px}.faq-list{display:grid;gap:10px}.faq-item{background:var(--surface);border:1px solid var(--line);border-radius:14px;padding:0 18px}.faq-item summary{cursor:pointer;font-weight:800;color:var(--ink);padding:17px 0}.faq-item p{color:var(--muted);padding:0 0 18px;margin:0}.faq-item summary:focus-visible{outline:3px solid rgba(108,79,248,.25);outline-offset:4px}
.support-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;padding-top:10px;padding-bottom:80px}.support-grid article{background:var(--surface);border:1px solid var(--line);border-radius:18px;padding:12px 12px 20px}.support-grid h2,.support-grid p,.support-grid a{margin-left:8px;margin-right:8px}.support-grid h2{font-size:22px;margin-top:16px}.support-grid p{color:var(--muted);font-size:14px}.support-grid a{font-weight:800;color:var(--primary)}
.not-found{padding-top:100px;padding-bottom:120px;max-width:900px}.not-found h1{font-size:clamp(46px,7vw,76px)}
.site-footer{border-top:1px solid var(--line);background:#f1eff7;padding:42px 24px 24px}.footer-grid{max-width:var(--max);margin:0 auto;display:grid;grid-template-columns:1.2fr .8fr;gap:34px}.footer-grid p{color:var(--muted);max-width:620px}.footer-grid nav{display:flex;gap:10px;flex-wrap:wrap;align-content:flex-start;justify-content:flex-end}.footer-grid nav a{padding:8px 12px;background:#fff;border:1px solid var(--line);border-radius:999px;font-size:13px}.copyright{max-width:var(--max);margin:26px auto 0;color:var(--muted);font-size:12px}
@media (max-width:900px){.hero,.page-intro,.story-grid,.split-section,.official-layout,.media-note,.device-detail{grid-template-columns:1fr}.hero{padding-top:52px}.hero-media{max-width:720px}.quick-facts,.device-strip__cards,.three-note-grid,.support-grid,.related-links{grid-template-columns:1fr 1fr}.compact-section{grid-template-columns:1fr}.compact-section>div:first-child{margin-left:0}.device-detail--reverse .device-detail__media{order:0}.site-nav{position:absolute;left:16px;right:16px;top:72px;display:none;background:#fff;border:1px solid var(--line);border-radius:16px;padding:10px;box-shadow:var(--shadow)}.site-nav.is-open{display:grid}.menu-toggle{display:block}.site-nav a{padding:12px}.topic-articles{grid-template-columns:1fr}}
@media (max-width:620px){.header-inner{padding-left:16px;padding-right:16px}.hero,.page-intro,.reading-section,.split-section,.device-strip,.index-section,.article-flow,.topic-articles,.related-panel,.official-layout,.three-note-grid,.device-detail-list,.media-note,.faq-section,.support-grid,.not-found{padding-left:16px;padding-right:16px}.hero{grid-template-columns:1fr;gap:28px;padding-top:38px}.hero h1{font-size:42px}.hero-lead,.page-intro p{font-size:16px}.quick-facts,.device-strip__cards,.check-grid,.three-note-grid,.support-grid,.related-links{grid-template-columns:1fr}.topic-link{grid-template-columns:1fr 22px}.topic-link__desc{grid-column:1/2}.topic-link__arrow{grid-row:1/3;grid-column:2}.footer-grid{grid-template-columns:1fr}.footer-grid nav{justify-content:flex-start}.brand small{display:none}}
@media (prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;transition:none!important}}
.troubleshoot-section,.comparison-section,.entry-section,.glossary-section{max-width:var(--max);margin:0 auto;padding:58px 24px}.section-heading-wide{max-width:850px}.section-heading-wide>p{font-size:17px;color:var(--muted)}.troubleshoot-list{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin-top:26px}.troubleshoot-item{background:var(--surface);border:1px solid var(--line);border-radius:14px;padding:0 18px}.troubleshoot-item summary{cursor:pointer;font-weight:800;padding:16px 0;color:var(--ink)}.troubleshoot-body{padding:0 0 18px;color:var(--muted);font-size:14px}.troubleshoot-body ol{margin:0 0 12px;padding-left:20px}.troubleshoot-body li{margin:5px 0}.troubleshoot-body p{margin:0;padding:12px;background:var(--soft);border-radius:10px}.troubleshoot-body strong{color:var(--ink)}
.table-wrap{overflow-x:auto;border:1px solid var(--line);border-radius:18px;background:var(--surface)}table{border-collapse:collapse;width:100%;min-width:920px}th,td{padding:14px 16px;text-align:left;vertical-align:top;border-bottom:1px solid var(--line);font-size:14px}thead th{background:var(--soft);color:var(--ink);font-size:13px}tbody th{color:var(--ink);width:120px}tbody td{color:var(--muted)}tbody tr:last-child th,tbody tr:last-child td{border-bottom:0}
.entry-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}.entry-grid article{background:var(--surface);border:1px solid var(--line);border-radius:16px;padding:18px}.entry-grid h3{font-size:18px;margin-bottom:12px}.entry-grid p{font-size:14px;color:var(--muted)}.entry-grid p strong{display:block;color:var(--primary);font-size:12px;letter-spacing:.05em;margin-bottom:3px}
.glossary-list{display:grid;grid-template-columns:1fr 1fr;gap:10px}.glossary-list div{display:grid;grid-template-columns:110px 1fr;gap:14px;padding:16px 18px;background:var(--surface);border:1px solid var(--line);border-radius:14px}.glossary-list dt{font-weight:900;color:var(--ink)}.glossary-list dd{margin:0;color:var(--muted);font-size:14px}
@media (max-width:900px){.troubleshoot-list,.entry-grid,.glossary-list{grid-template-columns:1fr}.entry-grid{grid-template-columns:1fr 1fr}}
@media (max-width:620px){.troubleshoot-section,.comparison-section,.entry-section,.glossary-section{padding-left:16px;padding-right:16px}.entry-grid{grid-template-columns:1fr}.glossary-list div{grid-template-columns:1fr;gap:4px}}
/* Keyboard, print and high-contrast refinements used across every page. */
:where(a,button,summary):focus-visible{outline:3px solid rgba(108,79,248,.34);outline-offset:3px;border-radius:8px}.button:focus-visible{outline-color:rgba(240,106,138,.48)}
@media (forced-colors:active){.button,.site-nav a,.topic-link,.related-links a,.faq-item,.troubleshoot-item{border:1px solid CanvasText}.button-primary{forced-color-adjust:none;background:ButtonText;color:ButtonFace}.section-kicker,.eyebrow,.text-link{color:LinkText}}
@media print{body{background:#fff;color:#000;font-size:11pt}.site-header,.site-footer,.menu-toggle,.hero-actions,.button,.skip-link{display:none!important}main{min-height:0}.hero,.page-intro,.reading-section,.split-section,.device-strip,.compact-section,.index-section,.article-flow,.topic-articles,.related-panel,.official-layout,.three-note-grid,.device-detail-list,.media-note,.faq-section,.support-grid,.troubleshoot-section,.comparison-section,.entry-section,.glossary-section{max-width:none!important;padding:18pt 0!important;margin:0!important;background:#fff!important;color:#000!important;box-shadow:none!important}.hero,.page-intro,.story-grid,.split-section,.official-layout,.media-note,.device-detail,.topic-articles,.device-strip__cards,.three-note-grid,.support-grid,.related-links,.troubleshoot-list,.entry-grid,.glossary-list{display:block!important}.hero-media,.story-note,.device-card,.topic-articles article,.related-links a,.numbered-list article,.three-note-grid article,.support-grid article,.troubleshoot-item,.entry-grid article,.glossary-list div{break-inside:avoid;border:1px solid #bbb!important;box-shadow:none!important;margin:0 0 10pt!important;background:#fff!important;color:#000!important}h1,h2,h3,.compact-section h2{color:#000!important}a{color:#000!important;text-decoration:underline!important}a[href^="http"]::after{content:" (" attr(href) ")";font-size:8pt}.site-footer a::after,.breadcrumb a::after{content:""!important}img{max-height:240pt;object-fit:contain}.compact-copy p,.story-note p,.device-card p,.article-summary,.official-layout p,.device-detail__copy p,.media-note p,.faq-item p,.support-grid p,.troubleshoot-body,.entry-grid p,.glossary-list dd{color:#222!important}.table-wrap{overflow:visible;border:0}table{min-width:0;font-size:8pt}th,td{padding:6pt;border:1px solid #999}.faq-item[open] .faq-item p,.troubleshoot-item[open] .troubleshoot-body{display:block}}