:root {
  --primary:#6C4FF8;
  --primary-soft:#9B8AFB;
  --deep:#1E1B2E;
  --bg:#F7F6FB;
  --bg-soft:#EEEAF8;
  --text:#252331;
  --muted:#716E7E;
  --accent:#F06A8A;
  --white:#fff;
  --border:rgba(30,27,46,.12);
  --shadow:0 18px 45px rgba(51,40,112,.09);
  --radius:22px;
  --container:min(1180px, calc(100% - 40px));
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;color:var(--text);background:var(--bg);line-height:1.7}
img{max-width:100%;height:auto;display:block}
a{color:inherit;text-decoration:none}
a:focus-visible,button:focus-visible{outline:3px solid rgba(240,106,138,.35);outline-offset:3px}
.container{width:var(--container);margin:0 auto}.narrow{max-width:820px}.prose-wide{max-width:920px;margin:0 auto}
.skip-link{position:fixed;left:12px;top:12px;background:var(--deep);color:#fff;padding:10px 14px;border-radius:10px;z-index:1000;transform:translateY(-150%)}.skip-link:focus{transform:none}
.site-header{position:sticky;top:0;z-index:50;background:rgba(247,246,251,.92);backdrop-filter:blur(16px);border-bottom:1px solid var(--border)}
.header-grid{min-height:78px;display:flex;align-items:center;justify-content:space-between;gap:28px}.brand{display:flex;align-items:center;gap:12px}.brand img{width:48px;height:48px;object-fit:cover;border-radius:14px}.brand span{display:grid}.brand strong{font-size:1.05rem;color:var(--deep)}.brand small{font-size:.78rem;color:var(--muted)}
.primary-nav{display:flex;gap:8px;align-items:center}.nav-link{padding:10px 14px;border-radius:12px;color:var(--muted);font-weight:650}.nav-link:hover,.nav-link.is-active{background:var(--bg-soft);color:var(--deep)}.menu-toggle{display:none;border:1px solid var(--border);background:#fff;padding:9px 12px;border-radius:12px;color:var(--deep);font-weight:700}
.hero{padding:76px 0 58px;background:radial-gradient(circle at 75% 20%,rgba(155,138,251,.28),transparent 34%),linear-gradient(180deg,#faf9ff 0%,var(--bg) 100%)}
.hero-grid{display:grid;grid-template-columns:1.06fr .94fr;gap:58px;align-items:center}.eyebrow{display:inline-flex;align-items:center;gap:8px;font-size:.78rem;letter-spacing:.08em;text-transform:uppercase;font-weight:800;color:var(--primary);margin-bottom:14px}.hero h1,.page-intro h1{font-size:clamp(2.5rem,5vw,4.8rem);line-height:1.08;letter-spacing:-.04em;margin:0 0 22px;color:var(--deep)}.hero-lede,.lede{font-size:1.13rem;color:var(--muted);max-width:760px}.hero-actions{display:flex;gap:12px;flex-wrap:wrap;margin:30px 0 24px}.btn{display:inline-flex;align-items:center;justify-content:center;min-height:48px;padding:0 18px;border-radius:14px;font-weight:800}.btn.primary{background:var(--primary);color:#fff;box-shadow:0 10px 30px rgba(108,79,248,.24)}.btn.secondary{background:#fff;border:1px solid var(--border);color:var(--deep)}.btn.tertiary{margin-top:24px;background:var(--deep);color:#fff}.hero-notes{display:flex;gap:10px;flex-wrap:wrap;padding:0;margin:0;list-style:none}.hero-notes li{padding:8px 11px;border:1px solid var(--border);border-radius:999px;font-size:.88rem;color:var(--muted);background:rgba(255,255,255,.72)}
.hero-media{margin:0;position:relative}.hero-media img{border-radius:28px;box-shadow:var(--shadow);aspect-ratio:1.23/1;object-fit:cover}.hero-media figcaption,.content-figure figcaption,.image-card figcaption{font-size:.82rem;color:var(--muted);margin-top:10px}
.section{padding:76px 0}.section-main{padding-top:64px}.soft-section{background:var(--bg-soft)}.accent-section{background:linear-gradient(180deg,#251f3b 0%,#1e1b2e 100%);color:#f7f5ff}.accent-section h2,.accent-section h3{color:#fff}.accent-section p{color:#cbc6dc}.index-section{padding-top:54px}
.section-head{display:grid;gap:8px;margin-bottom:28px;max-width:760px}.section-head h2,.split-layout h2,.official-block h2,.prose h2,.prose-wide h2,.topic-feature h2{font-size:clamp(1.7rem,3vw,2.55rem);line-height:1.22;color:var(--deep);margin:0 0 10px}.wide-head{grid-template-columns:1.2fr .8fr;max-width:none;align-items:end}.wide-head p{margin:0;color:var(--muted)}
.topic-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}.topic-card{background:#fff;border:1px solid var(--border);border-radius:var(--radius);padding:26px;box-shadow:0 8px 26px rgba(51,40,112,.05)}.topic-card h3{font-size:1.2rem;margin:0 0 10px;color:var(--deep)}.topic-card p{color:var(--muted);margin:0 0 16px}.text-link{font-weight:800;color:var(--primary);text-decoration:underline;text-decoration-thickness:1px;text-underline-offset:4px}
.feature-strip{display:grid;grid-template-columns:.9fr 1.1fr;gap:30px;align-items:center;margin-top:30px;padding:26px;border-radius:var(--radius);background:#fff;border:1px solid var(--border)}.feature-strip img{border-radius:18px;aspect-ratio:1.5/1;object-fit:cover}.feature-strip h3{font-size:1.55rem;margin:0 0 10px;color:var(--deep)}.feature-strip p{color:var(--muted)}
.split-layout{display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:center}.split-layout img{border-radius:24px;box-shadow:var(--shadow);aspect-ratio:1.45/1;object-fit:cover}.split-layout p{color:var(--muted)}.inline-links{display:flex;gap:12px;flex-wrap:wrap}.inline-links a{background:#fff;border:1px solid var(--border);padding:10px 12px;border-radius:12px;color:var(--deep);font-weight:700}
.device-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}.device-grid.large{gap:22px}.device-item{padding:24px;border-radius:var(--radius);background:#fff;border:1px solid var(--border)}.device-type{display:inline-block;font-size:.78rem;font-weight:800;color:var(--accent);margin-bottom:10px}.device-item h3{margin:0 0 10px;color:var(--deep)}.device-item p{color:var(--muted)}.compact-list,.check-list{padding-left:20px;margin:16px 0 0}.compact-list li,.check-list li{margin:8px 0}.check-list li::marker{color:var(--primary)}
.index-list{display:grid;grid-template-columns:repeat(2,1fr);gap:14px}.index-list a{display:grid;gap:4px;padding:20px 22px;border-radius:18px;background:#fff;border:1px solid var(--border)}.index-list strong{color:var(--deep)}.index-list span{color:var(--muted);font-size:.92rem}
.page-intro{padding:62px 0 34px}.page-intro h1{font-size:clamp(2.2rem,4vw,4rem)}.breadcrumbs{width:var(--container);margin:26px auto 0}.breadcrumbs ol{display:flex;flex-wrap:wrap;gap:8px;list-style:none;padding:0;margin:0;color:var(--muted);font-size:.88rem}.breadcrumbs li:not(:last-child)::after{content:"/";margin-left:8px;color:#aaa4b6}
.article-layout{display:grid;grid-template-columns:minmax(0,1fr) 300px;gap:46px;align-items:start}.prose p,.prose-wide p{font-size:1.03rem;color:#504c5e;margin:0 0 19px}.prose h2,.prose-wide h2{margin-top:42px}.prose h2:first-child,.prose-wide h2:first-child{margin-top:0}.content-figure{margin:32px 0}.content-figure img{border-radius:22px;aspect-ratio:1.78/1;object-fit:cover}.info-box{padding:22px 24px;border-radius:18px;background:var(--bg-soft);border:1px solid rgba(108,79,248,.16);margin:28px 0}.info-box h3{margin:0 0 10px;color:var(--deep)}.info-box ul{margin:0;padding-left:20px}.side-note{position:sticky;top:104px;display:grid;gap:10px;padding:22px;border-radius:20px;background:#fff;border:1px solid var(--border)}.side-note h2{font-size:1.1rem;margin:0 0 6px}.side-note a{color:var(--primary);font-weight:700}.side-note img{margin-top:10px;border-radius:16px;aspect-ratio:1.35/1;object-fit:cover}
.official-stack{display:grid;gap:20px}.official-block{background:#fff;border:1px solid var(--border);border-radius:var(--radius);padding:30px}.feature-block{display:grid;grid-template-columns:1.1fr .9fr;gap:36px;align-items:center}.feature-block img{border-radius:20px;aspect-ratio:1.45/1;object-fit:cover}.comparison-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px;margin:22px 0}.comparison-grid>div{padding:20px;border-radius:16px;background:var(--bg-soft)}.comparison-grid h3{margin:0 0 8px;color:var(--deep)}.comparison-grid ul{margin:0;padding-left:20px}.soft-card{background:linear-gradient(135deg,#f7f4ff 0%,#fff 100%)}
.topic-feature-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:18px}.topic-feature{background:#fff;border:1px solid var(--border);padding:28px;border-radius:var(--radius)}.topic-feature p{color:var(--muted)}.image-card{padding:0;overflow:hidden}.image-card img{width:100%;height:100%;min-height:320px;object-fit:cover}.image-card figcaption{padding:0 20px 18px}.not-found{text-align:center}.not-found .index-list{text-align:left;margin-top:28px}
.site-footer{padding:44px 0 22px;background:var(--deep);color:#ddd8eb}.footer-grid{display:grid;grid-template-columns:1fr auto;gap:28px}.footer-brand{font-size:1.2rem;color:#fff}.footer-grid p{margin:.45rem 0 0;color:#bdb6cd}.footer-links{display:flex;gap:16px;flex-wrap:wrap}.footer-links a{color:#f4f1fb}.footer-meta{margin-top:26px;padding-top:18px;border-top:1px solid rgba(255,255,255,.1);font-size:.85rem;color:#9f97b3}
@media (max-width:900px){
  .hero-grid,.split-layout,.feature-strip,.feature-block,.wide-head,.article-layout{grid-template-columns:1fr}.hero{padding-top:52px}.hero-media{max-width:720px}.topic-grid,.device-grid{grid-template-columns:1fr 1fr}.article-layout{gap:24px}.side-note{position:static}.reverse-mobile img{order:2}.primary-nav{position:absolute;right:20px;top:68px;display:none;flex-direction:column;align-items:stretch;width:min(300px,calc(100vw - 40px));padding:12px;background:#fff;border:1px solid var(--border);border-radius:16px;box-shadow:var(--shadow)}.primary-nav.is-open{display:flex}.menu-toggle{display:block}.comparison-grid{grid-template-columns:1fr}
}
@media (max-width:620px){
  :root{--container:min(100% - 28px,1180px)}.header-grid{min-height:68px}.brand small{display:none}.brand img{width:42px;height:42px}.hero h1,.page-intro h1{letter-spacing:-.03em}.section{padding:56px 0}.topic-grid,.device-grid,.index-list,.topic-feature-grid{grid-template-columns:1fr}.hero-actions{align-items:stretch}.hero-actions .btn{width:100%}.hero-notes{display:grid}.feature-strip,.official-block,.topic-feature{padding:20px}.footer-grid{grid-template-columns:1fr}.footer-links{display:grid;gap:8px}
}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*::before,*::after{animation-duration:.01ms!important;animation-iteration-count:1!important;transition-duration:.01ms!important}}