:root{
  --primary:#6C4FF8;--primary-soft:#9B8AFB;--ink:#252331;--ink-deep:#1E1B2E;--muted:#716E7E;
  --bg:#F7F6FB;--bg-2:#EEEAF8;--accent:#F06A8A;--line:#ddd7ec;--white:#fff;
  --radius:22px;--shadow:0 18px 48px rgba(30,27,46,.08);--shell:min(1180px,calc(100% - 40px));
}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--bg);color:var(--ink);font-family:system-ui,-apple-system,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;line-height:1.75}img{display:block;max-width:100%;height:auto}a{color:inherit;text-decoration:none}button,input,select,textarea{font:inherit}.skip-link{position:absolute;left:-999px;top:10px;background:var(--ink-deep);color:#fff;padding:10px 14px;border-radius:10px;z-index:999}.skip-link:focus{left:10px}.shell{width:var(--shell);margin-inline:auto}.site-header{position:sticky;top:0;z-index:20;background:rgba(247,246,251,.92);backdrop-filter:blur(16px);border-bottom:1px solid rgba(221,215,236,.9)}.header-inner{width:var(--shell);margin:auto;min-height:76px;display:flex;align-items:center;justify-content:space-between;gap:26px}.brand{display:flex;align-items:center;gap:12px;min-width:190px}.brand img{width:44px;height:44px;object-fit:contain}.brand span{display:flex;flex-direction:column;line-height:1.25}.brand strong{font-size:18px;color:var(--ink-deep)}.brand small{font-size:12px;color:var(--muted);margin-top:4px}.site-nav{display:flex;align-items:center;gap:6px}.nav-link{padding:10px 13px;border-radius:12px;color:var(--muted);font-size:14px;font-weight:650}.nav-link:hover,.nav-link:focus-visible{background:var(--bg-2);color:var(--ink-deep)}.nav-link.is-active{background:var(--ink-deep);color:#fff}.menu-toggle{display:none;border:1px solid var(--line);background:#fff;border-radius:12px;padding:8px 11px;color:var(--ink-deep)}
.hero{display:grid;grid-template-columns:1.02fr .98fr;gap:52px;align-items:center;padding:72px 0 56px}.eyebrow{margin:0 0 10px;color:var(--primary);font-weight:800;letter-spacing:.08em;font-size:13px}.hero h1,.page-head h1,.error-page h1{margin:0;color:var(--ink-deep);font-size:clamp(38px,6vw,68px);line-height:1.08;letter-spacing:-.04em}.page-head h1{font-size:clamp(34px,5vw,58px)}.lead{font-size:19px;color:var(--muted);margin:22px 0 0;max-width:780px}.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin:28px 0}.button{display:inline-flex;align-items:center;justify-content:center;min-height:48px;padding:0 18px;border-radius:14px;font-weight:750}.button.primary{background:var(--primary);color:#fff;box-shadow:0 12px 30px rgba(108,79,248,.23)}.button.primary:hover{filter:brightness(.96)}.button.ghost{background:#fff;border:1px solid var(--line);color:var(--ink-deep)}.hero-points{display:flex;flex-wrap:wrap;gap:8px 18px;padding:0;margin:24px 0 0;list-style:none;color:var(--muted);font-size:14px}.hero-points li:before{content:"";display:inline-block;width:8px;height:8px;margin-right:8px;border-radius:50%;background:var(--accent)}.hero-media{margin:0;background:linear-gradient(145deg,var(--bg-2),#fff);padding:14px;border:1px solid var(--line);border-radius:30px;box-shadow:var(--shadow)}.hero-media img,.wide-media img,.editorial-media img{width:100%;aspect-ratio:16/11;object-fit:cover;border-radius:20px;background:var(--bg-2)}.hero-media figcaption{font-size:13px;color:var(--muted);padding:10px 4px 2px}.section{padding:72px 0}.split-focus{display:grid;grid-template-columns:minmax(0,.85fr) minmax(0,1.15fr);gap:52px}.section-intro h2,.section-heading h2,.article-section h2{font-size:clamp(28px,4vw,42px);line-height:1.18;color:var(--ink-deep);margin:0 0 18px;letter-spacing:-.025em}.section-intro p{color:var(--muted)}.text-link{display:inline-flex;margin-top:16px;color:var(--primary);font-weight:800}.stack-list{display:grid;gap:14px}.stack-card{background:#fff;border:1px solid var(--line);border-radius:18px;padding:22px 24px}.stack-card h3{margin:0 0 8px;color:var(--ink-deep);font-size:20px}.stack-card p{margin:0;color:var(--muted)}.band{background:var(--bg-2);border-block:1px solid var(--line)}.section-heading{margin-bottom:28px}.topic-links{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}.topic-link{display:flex;flex-direction:column;gap:7px;background:#fff;border:1px solid var(--line);border-radius:18px;padding:22px;transition:transform .2s ease,border-color .2s ease}.topic-link:hover,.topic-link:focus-visible{transform:translateY(-2px);border-color:var(--primary-soft)}.topic-link strong{color:var(--ink-deep);font-size:18px}.topic-link span{color:var(--muted);font-size:14px}.editorial-grid{display:grid;grid-template-columns:1fr 1fr;gap:46px;align-items:center}.editorial-grid.reverse>div{order:1}.editorial-grid.reverse>figure{order:2}.editorial-grid p{color:var(--muted)}.editorial-media{margin:0}.faq-grid{display:grid;grid-template-columns:1fr 1fr;gap:12px}.faq-grid details{background:#fff;border:1px solid var(--line);border-radius:16px;padding:18px}.faq-grid summary{cursor:pointer;font-weight:750;color:var(--ink-deep)}.faq-grid p{color:var(--muted);margin:12px 0 0}.breadcrumbs{margin-top:28px}.breadcrumbs ol{display:flex;flex-wrap:wrap;gap:8px;list-style:none;padding:0;margin:0;color:var(--muted);font-size:13px}.breadcrumbs li:not(:last-child)::after{content:"/";margin-left:8px;color:#aaa4b5}.breadcrumbs a:hover{color:var(--primary)}.article-shell{max-width:1000px}.page-head{padding:54px 0 30px}.page-head.compact{max-width:860px}.wide-media{margin:8px 0 58px;padding:10px;background:#fff;border:1px solid var(--line);border-radius:26px}.wide-media img{aspect-ratio:2/1}.article-section{padding:18px 0 46px}.article-section>p{color:var(--muted);font-size:17px}.content-cards{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px;margin-top:24px}.content-cards article,.topic-rows article{background:#fff;border:1px solid var(--line);border-radius:18px;padding:22px}.content-cards h3{font-size:18px;color:var(--ink-deep);margin:0 0 8px}.content-cards p,.topic-rows p{margin:0;color:var(--muted)}.callout{background:var(--ink-deep);color:#fff;border-radius:24px;padding:30px 32px;margin:16px 0 42px}.callout h2{color:#fff}.steps{padding-left:22px;margin:18px 0 0}.steps li{margin:12px 0;color:#ddd9ec}.official-grid{display:grid;grid-template-columns:.85fr 1.15fr;gap:34px;align-items:start}.official-grid figure{margin:0;position:sticky;top:104px}.official-grid img{border-radius:24px;border:1px solid var(--line);background:var(--bg-2)}.check-list{display:grid;gap:14px}.check-list article{background:#fff;border:1px solid var(--line);border-radius:18px;padding:20px}.check-list h2{font-size:22px;margin-bottom:8px}.check-list p{margin:0;color:var(--muted)}.notice{background:#fff4f7;border:1px solid #f5c8d4;border-radius:15px;padding:16px 18px;color:#6d3a49;margin-top:18px}.device-list{display:grid;gap:14px}.device-card{display:grid;grid-template-columns:.8fr 1.2fr;gap:34px;background:#fff;border:1px solid var(--line);border-radius:20px;padding:24px}.device-card h2{font-size:28px;margin:3px 0 8px}.device-label{display:inline-block;color:var(--accent);font-weight:800;font-size:12px;letter-spacing:.08em}.device-card p{color:var(--muted);margin:0}.device-card ul{margin:0;padding-left:20px;color:var(--muted)}.device-card li{margin:7px 0}.compare-table-wrap{overflow:hidden}.table-scroll{overflow:auto;border:1px solid var(--line);border-radius:18px;background:#fff}table{width:100%;border-collapse:collapse;min-width:720px}th,td{text-align:left;padding:15px 16px;border-bottom:1px solid var(--line);font-size:14px}thead th{background:var(--bg-2);color:var(--ink-deep)}tbody th{color:var(--ink-deep)}td{color:var(--muted)}.topic-rows{display:grid;grid-template-columns:1fr 1fr;gap:14px}.topic-rows h2{font-size:24px}.error-page{min-height:62vh;padding:110px 0}.site-footer{margin-top:70px;background:var(--ink-deep);color:#eeeaf8}.footer-inner{width:var(--shell);margin:auto;padding:44px 0;display:flex;justify-content:space-between;gap:30px}.footer-inner p{max-width:520px;color:#bdb7cf}.footer-inner nav{display:flex;flex-wrap:wrap;gap:10px 18px;align-content:flex-start}.footer-inner a{color:#dcd6ed}.footer-inner a:hover{color:#fff}.copyright{width:var(--shell);margin:0 auto;padding:18px 0 28px;border-top:1px solid rgba(255,255,255,.1);color:#9e97b2;font-size:13px}
@media(max-width:900px){.hero,.split-focus,.editorial-grid,.official-grid{grid-template-columns:1fr}.hero{padding-top:48px}.hero-media{max-width:720px}.official-grid figure{position:static}.content-cards{grid-template-columns:1fr 1fr}.site-nav{position:absolute;top:68px;right:20px;left:20px;background:#fff;border:1px solid var(--line);border-radius:18px;padding:10px;box-shadow:var(--shadow);display:none;flex-direction:column;align-items:stretch}.site-nav.is-open{display:flex}.menu-toggle{display:block}.nav-link{padding:12px}.device-card{grid-template-columns:1fr}.topic-rows{grid-template-columns:1fr}.editorial-grid.reverse>div,.editorial-grid.reverse>figure{order:initial}}
@media(max-width:640px){:root{--shell:min(100% - 26px,1180px)}.header-inner{min-height:68px}.brand small{display:none}.hero{gap:28px;padding:38px 0}.hero h1,.page-head h1{font-size:38px}.lead{font-size:17px}.section{padding:52px 0}.topic-links,.faq-grid,.content-cards{grid-template-columns:1fr}.page-head{padding-top:40px}.article-section{padding-bottom:34px}.callout{padding:24px 22px}.footer-inner{flex-direction:column}.hero-actions .button{width:100%}}
@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;transition:none!important;animation:none!important}}
.long-help>p{color:var(--muted);max-width:820px}.help-index{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin-top:24px}.help-index details{background:#fff;border:1px solid var(--line);border-radius:16px;padding:18px}.help-index summary{cursor:pointer;font-weight:750;color:var(--ink-deep)}.help-index p{margin:12px 0 0;color:var(--muted)}@media(max-width:720px){.help-index{grid-template-columns:1fr}}