:root{--primary:#5B4BDB;--primary-soft:#8B7CF6;--ink:#1E1B2E;--text:#292734;--muted:#6F6B7A;--bg:#F7F7FB;--soft:#EFEFFC;--accent:#F05A7E;--white:#fff;--border:#dedcf2;--shadow:0 18px 45px rgba(47,38,112,.09);--radius:26px;--radius-sm:16px;--shell: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;background:var(--bg);color:var(--text);line-height:1.75}img{max-width:100%;height:auto;display:block}a{color:inherit;text-decoration:none}button,input{font:inherit}.shell{width:var(--shell);margin-inline:auto}.skip-link{position:fixed;left:16px;top:12px;z-index:999;transform:translateY(-160%);background:var(--ink);color:#fff;padding:10px 14px;border-radius:10px}.skip-link:focus{transform:none}.site-header{position:sticky;top:0;z-index:50;background:rgba(247,247,251,.94);backdrop-filter:blur(18px);border-bottom:1px solid rgba(91,75,219,.1)}.header-inner{min-height:82px;display:flex;align-items:center;justify-content:space-between;gap:24px}.brand{display:flex;align-items:center;gap:12px}.brand img{width:48px;height:48px;object-fit:contain;border-radius:14px}.brand span{display:grid}.brand strong{font-size:1.2rem;color:var(--ink)}.brand small{font-size:.76rem;color:var(--muted)}.primary-nav{display:flex;gap:6px;align-items:center}.primary-nav a{padding:10px 14px;border-radius:999px;color:var(--muted);font-weight:650}.primary-nav a:hover,.primary-nav a.is-active{background:var(--soft);color:var(--primary)}.menu-button{display:none;border:1px solid var(--border);background:#fff;color:var(--ink);border-radius:12px;padding:9px 12px}.eyebrow{display:inline-flex;align-items:center;gap:8px;font-size:.78rem;font-weight:800;letter-spacing:.08em;color:var(--primary);text-transform:uppercase}.eyebrow:before{content:"";width:26px;height:2px;background:var(--accent);border-radius:999px}.hero-section{padding:76px 0 56px;background:radial-gradient(circle at 85% 10%,rgba(139,124,246,.22),transparent 26%),linear-gradient(180deg,#fff 0%,var(--bg) 100%)}.hero-grid,.page-intro{display:grid;grid-template-columns:minmax(0,1.05fr) minmax(380px,.95fr);align-items:center;gap:56px}.hero-copy h1,.page-intro h1{font-size:clamp(2.6rem,5vw,5.1rem);line-height:1.06;letter-spacing:-.045em;margin:16px 0 22px;color:var(--ink)}.page-intro h1{font-size:clamp(2.35rem,4.6vw,4.6rem)}.lead{font-size:clamp(1.05rem,1.4vw,1.22rem);color:var(--muted);max-width:720px}.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 20px;border-radius:14px;font-weight:800;border:1px solid transparent;transition:.2s ease}.button:hover{transform:translateY(-2px)}.button.primary{background:var(--primary);color:#fff;box-shadow:0 12px 30px rgba(91,75,219,.22)}.button.secondary{background:#fff;color:var(--primary);border-color:var(--border)}.topic-links{display:flex;flex-wrap:wrap;gap:8px}.topic-chip{font-size:.9rem;padding:8px 12px;border-radius:999px;border:1px solid var(--border);background:#fff;color:var(--muted)}.topic-chip:hover{border-color:var(--primary-soft);color:var(--primary)}.hero-visual,.page-intro>img{position:relative}.hero-visual img,.page-intro>img{width:100%;border-radius:34px;box-shadow:var(--shadow);object-fit:cover}.hero-visual:before{content:"";position:absolute;inset:-18px 18px 18px -18px;border-radius:34px;background:var(--soft);z-index:-1}.hero-visual figcaption{font-size:.82rem;color:var(--muted);margin-top:12px}.section{padding:86px 0}.section.tinted{background:var(--soft)}.section-heading{margin-bottom:36px}.section-heading.narrow{max-width:760px}.section-heading h2,.split-panel h2,.callout-grid h2,.utility-strip h2,.editorial-grid h2{font-size:clamp(2rem,3.2vw,3.2rem);line-height:1.13;letter-spacing:-.03em;margin:12px 0;color:var(--ink)}.section-heading p,.split-panel p,.callout-grid p,.utility-strip p,.editorial-grid p{color:var(--muted)}.row-heading{display:flex;align-items:end;justify-content:space-between;gap:24px}.highlight-list{display:grid;gap:34px}.highlight-item{display:grid;grid-template-columns:1fr 1fr;gap:40px;align-items:center;padding:28px;border-radius:var(--radius);background:#fff;border:1px solid rgba(91,75,219,.08);box-shadow:var(--shadow)}.highlight-item.reverse .highlight-media{order:2}.highlight-media img{width:100%;aspect-ratio:16/10;object-fit:cover;border-radius:20px}.index-mark{display:inline-flex;font-size:.82rem;font-weight:900;color:var(--accent);letter-spacing:.12em}.highlight-copy h3,.video-teaser h3,.index-row h3{font-size:1.55rem;line-height:1.25;margin:8px 0;color:var(--ink)}.highlight-copy p,.video-teaser p,.index-row p{color:var(--muted)}.text-link{display:inline-flex;margin-top:8px;color:var(--primary);font-weight:800}.text-link:hover{text-decoration:underline}.split-panel,.callout-grid,.editorial-grid{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center}.split-panel img,.callout-grid img,.mosaic img{border-radius:26px;box-shadow:var(--shadow)}.video-teasers{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}.video-teaser{background:#fff;border:1px solid rgba(91,75,219,.08);border-radius:22px;overflow:hidden}.video-teaser img{width:100%;aspect-ratio:16/10;object-fit:cover}.video-teaser div{padding:20px 22px 24px}.utility-strip{margin-top:12px;margin-bottom:78px;padding:34px 38px;border-radius:26px;background:var(--ink);color:#fff;display:flex;align-items:center;justify-content:space-between;gap:28px}.utility-strip h2{color:#fff;margin:4px 0 8px;font-size:2rem}.utility-strip p{color:#d9d5e4;margin:0}.breadcrumbs{width:var(--shell);margin:28px auto 0}.breadcrumbs ol{display:flex;flex-wrap:wrap;list-style:none;padding:0;margin:0;gap:8px;font-size:.88rem;color:var(--muted)}.breadcrumbs li:not(:last-child):after{content:"/";margin-left:8px;color:#b6b0c8}.breadcrumbs a:hover{color:var(--primary)}.page-intro{padding-top:56px;padding-bottom:48px}.compact-intro{padding-bottom:28px}.prose-layout{display:grid;grid-template-columns:minmax(0,1fr) 330px;gap:34px;align-items:start}.prose-main{display:grid;gap:20px}.prose-card{background:#fff;border:1px solid var(--border);border-radius:22px;padding:28px}.prose-card h2,.side-note h2,.content-index-head h2,.note-card h2,.dense-grid h2{margin-top:0;color:var(--ink);font-size:1.45rem}.prose-card p{margin-bottom:0;color:var(--muted)}.side-note{position:sticky;top:112px;background:var(--ink);color:#fff;border-radius:22px;padding:24px;display:grid;gap:10px}.side-note h2{color:#fff}.side-note a{display:grid;gap:2px;background:rgba(255,255,255,.07);padding:14px;border-radius:14px}.side-note span{font-size:.84rem;color:#c9c4d5}.content-index{display:grid;grid-template-columns:320px 1fr;gap:54px;align-items:start}.content-index-head{position:sticky;top:120px}.content-index-head p{color:var(--muted)}.index-rows{display:grid}.index-row{display:grid;grid-template-columns:52px 1fr;gap:20px;padding:26px 0;border-bottom:1px solid var(--border)}.index-row:first-child{padding-top:0}.index-row .summary{font-weight:700;color:var(--text)}.mosaic{display:grid;grid-template-columns:1fr 1fr;gap:14px}.mosaic img{height:100%;object-fit:cover}.faq-preview{padding-bottom:70px}.faq-stack{display:grid;gap:12px}.faq-stack details{background:#fff;border:1px solid var(--border);border-radius:16px;padding:4px 18px}.faq-stack summary{cursor:pointer;font-weight:800;color:var(--ink);padding:16px 0}.faq-stack p{color:var(--muted);margin:0;padding:0 0 18px}.large-faq{max-width:900px}.video-catalog{display:grid;gap:28px}.catalog-row{display:grid;grid-template-columns:minmax(300px,.9fr) 1.1fr;gap:38px;align-items:center;background:#fff;border-radius:26px;border:1px solid var(--border);padding:24px}.catalog-row:nth-child(even) img{order:2}.catalog-row img{width:100%;border-radius:20px;aspect-ratio:16/10;object-fit:cover}.catalog-row h2{font-size:2rem;line-height:1.15;color:var(--ink);margin:8px 0 12px}.clean-list{display:grid;gap:7px;padding-left:20px;color:var(--muted)}.dense-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}.dense-grid article{background:#fff;padding:24px;border-radius:18px}.dense-grid p{color:var(--muted);margin-bottom:0}.note-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:20px}.note-card{background:#fff;border:1px solid var(--border);border-radius:20px;padding:26px}.note-card p{color:var(--muted);margin-bottom:0}.reverse-grid>div{order:2}.not-found{min-height:62vh;display:flex;flex-direction:column;align-items:flex-start;justify-content:center;max-width:760px}.error-code{font-size:5rem;line-height:1;font-weight:950;color:var(--primary-soft)}.not-found h1{font-size:3rem;color:var(--ink);margin:14px 0}.not-found p{color:var(--muted);font-size:1.1rem}.site-footer{background:#171522;color:#d8d5e0;padding:58px 0 24px}.footer-grid{display:grid;grid-template-columns:1.3fr .7fr;gap:60px}.footer-brand{font-size:2rem;color:#fff}.footer-grid p{max-width:620px;color:#a9a4b5}.footer-grid nav{display:grid;gap:8px}.footer-grid nav a:hover{color:#fff}.footer-bottom{margin-top:34px;padding-top:18px;border-top:1px solid rgba(255,255,255,.1);font-size:.86rem;color:#8f899b}a:focus-visible,button:focus-visible,summary:focus-visible{outline:3px solid rgba(240,90,126,.45);outline-offset:3px}
@media (max-width:980px){.hero-grid,.page-intro,.split-panel,.callout-grid,.editorial-grid{grid-template-columns:1fr}.hero-grid{gap:34px}.page-intro>img{max-height:480px;object-fit:cover}.video-teasers,.dense-grid{grid-template-columns:1fr 1fr}.prose-layout,.content-index{grid-template-columns:1fr}.side-note,.content-index-head{position:static}.catalog-row{grid-template-columns:1fr}.catalog-row:nth-child(even) img{order:0}.footer-grid{grid-template-columns:1fr}.hero-copy h1{font-size:clamp(2.5rem,8vw,4.5rem)}}
@media (max-width:760px){:root{--shell:min(100% - 28px,1180px)}.header-inner{min-height:70px}.brand img{width:42px;height:42px}.menu-button{display:inline-flex}.primary-nav{position:absolute;left:14px;right:14px;top:68px;background:#fff;border:1px solid var(--border);box-shadow:var(--shadow);border-radius:18px;padding:10px;display:none;grid-template-columns:1fr 1fr}.primary-nav.is-open{display:grid}.primary-nav a{border-radius:12px}.hero-section{padding-top:46px}.hero-grid,.page-intro{grid-template-columns:1fr;gap:28px}.hero-copy h1,.page-intro h1{font-size:clamp(2.2rem,12vw,3.5rem)}.section{padding:64px 0}.highlight-item{grid-template-columns:1fr;padding:18px}.highlight-item.reverse .highlight-media{order:0}.row-heading{align-items:flex-start;flex-direction:column}.video-teasers,.dense-grid,.note-grid{grid-template-columns:1fr}.split-panel,.callout-grid,.editorial-grid{gap:30px}.content-index{gap:22px}.index-row{grid-template-columns:38px 1fr}.mosaic{grid-template-columns:1fr}.utility-strip{align-items:flex-start;flex-direction:column;padding:28px;margin-bottom:54px}.footer-grid{gap:24px}}
@media (prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;transition:none!important;animation:none!important}}
.term-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:18px}.term-card{background:#fff;border:1px solid var(--border);border-radius:20px;padding:24px}.term-card h2{margin:0 0 10px;color:var(--ink);font-size:1.32rem}.term-card p{margin:0;color:var(--muted)}@media(max-width:760px){.term-grid{grid-template-columns:1fr}}
.guide-list{display:grid;gap:0}.guide-row{display:grid;grid-template-columns:64px 1fr;gap:18px;padding:28px 0;border-bottom:1px solid var(--border)}.guide-row>span{font-weight:900;color:var(--accent);letter-spacing:.1em}.guide-row h2{font-size:1.45rem;color:var(--ink);margin:0 0 8px}.guide-row p{color:var(--muted);margin:0}@media(max-width:760px){.guide-row{grid-template-columns:42px 1fr}}
.deep-dive{display:grid;grid-template-columns:repeat(2,1fr);gap:20px}.deep-block{background:#fff;border:1px solid var(--border);border-radius:22px;padding:28px}.deep-block h2{margin:0 0 12px;color:var(--ink);font-size:1.45rem;line-height:1.3}.deep-block p{color:var(--muted);margin:0}.deep-block p+p{margin-top:12px}@media(max-width:760px){.deep-dive{grid-template-columns:1fr}}
.safety-checks{display:grid;grid-template-columns:repeat(2,1fr);gap:18px}.safety-row{display:grid;grid-template-columns:44px 1fr;gap:14px;background:#fff;border:1px solid var(--border);border-radius:20px;padding:24px}.safety-row>span{font-weight:900;color:var(--accent);letter-spacing:.08em}.safety-row h2{margin:0 0 8px;color:var(--ink);font-size:1.25rem}.safety-row p{margin:0;color:var(--muted)}.sitemap-groups{display:grid;gap:48px}.sitemap-group{display:grid;grid-template-columns:280px 1fr;gap:42px}.sitemap-group>div:first-child h2{font-size:2rem;color:var(--ink);margin:0 0 8px}.sitemap-group>div:first-child p{color:var(--muted)}.sitemap-links{display:grid;gap:12px}.sitemap-links a{display:grid;gap:4px;background:#fff;border:1px solid var(--border);border-radius:16px;padding:18px}.sitemap-links a:hover{border-color:var(--primary-soft);box-shadow:var(--shadow)}.sitemap-links strong{color:var(--ink)}.sitemap-links span{font-size:.9rem;color:var(--muted)}@media(max-width:900px){.safety-checks{grid-template-columns:1fr}.sitemap-group{grid-template-columns:1fr;gap:18px}}