:root{--primary:#5B4BDB;--primary-soft:#8B7CF6;--ink:#1E1B2E;--text:#292734;--muted:#6F6B7A;--bg:#F7F7FB;--panel:#EFEFFC;--accent:#F05A7E;--white:#fff;--line:#dddced;--radius:22px;--shadow:0 18px 50px rgba(52,43,100,.08)}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;font-family:system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;color:var(--text);background:var(--bg);line-height:1.72}img{max-width:100%;height:auto;display:block}a{color:var(--primary);text-decoration-thickness:1px;text-underline-offset:3px}.shell{width:min(1160px,calc(100% - 40px));margin-inline:auto}.skip-link{position:absolute;left:-9999px;top:10px;background:var(--ink);color:#fff;padding:10px 14px;z-index:100}.skip-link:focus{left:12px}.site-header{position:sticky;top:0;z-index:20;background:rgba(247,247,251,.92);backdrop-filter:blur(18px);border-bottom:1px solid rgba(91,75,219,.09)}.header-inner{display:flex;align-items:center;gap:28px;min-height:82px}.brand{display:flex;align-items:center;gap:12px;color:var(--ink);text-decoration:none;min-width:max-content}.brand img{width:44px;height:44px;object-fit:contain}.brand strong{display:block;font-size:1.1rem}.brand small{display:block;color:var(--muted);font-size:.72rem}.site-nav{display:grid;grid-template-columns:repeat(5,1fr);gap:8px;width:100%}.site-nav a{padding:10px 12px;border-radius:14px;text-decoration:none;color:var(--text)}.site-nav a span{display:block;font-weight:700;font-size:.92rem}.site-nav a small{display:block;color:var(--muted);font-size:.68rem;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.site-nav a[aria-current="page"],.site-nav a:hover{background:var(--panel);color:var(--primary)}.menu-toggle{display:none;margin-left:auto;border:1px solid var(--line);border-radius:12px;background:#fff;padding:9px 13px;color:var(--ink)}.hero{display:grid;grid-template-columns:1.1fr .9fr;gap:64px;align-items:center;padding-block:76px 56px}.eyebrow{margin:0 0 12px;color:var(--primary);font-weight:800;letter-spacing:.12em;font-size:.78rem;text-transform:uppercase}.hero h1,.article-hero h1,.app-hero h1{margin:0;color:var(--ink);font-size:clamp(2.3rem,5vw,4.9rem);line-height:1.04;letter-spacing:-.045em}.lede{font-size:1.12rem;color:#555063;max-width:760px}.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin:28px 0}.button{display:inline-flex;align-items:center;justify-content:center;min-height:46px;padding:0 18px;border-radius:999px;text-decoration:none;font-weight:750}.button.primary{background:var(--primary);color:#fff}.button.secondary{background:#fff;color:var(--ink);border:1px solid var(--line)}.trust-row{display:flex;flex-wrap:wrap;gap:8px}.trust-row span,.tag{display:inline-flex;padding:6px 10px;border-radius:999px;background:var(--panel);color:var(--primary);font-size:.78rem;font-weight:700}.hero-visual{margin:0;background:#fff;border-radius:32px;padding:16px;box-shadow:var(--shadow);transform:rotate(1.5deg)}.hero-visual img{border-radius:22px;aspect-ratio:4/3;object-fit:cover}.hero-visual figcaption{padding:14px 8px 4px;color:var(--muted);font-size:.82rem}.section-heading{max-width:760px;margin-bottom:28px}.section-heading h2,.split-panel h2,.quiet-copy h2,.collection-intro h2,.content-group h2,.next-paths h2,.context-note h2,.mobile-paths h2{margin:0;color:var(--ink);font-size:clamp(1.65rem,3vw,2.7rem);line-height:1.15;letter-spacing:-.025em}.focus-grid{padding-block:56px 84px}.highlight-list{border-top:1px solid var(--line)}.highlight-item{display:grid;grid-template-columns:1fr 1.35fr .8fr;gap:24px;align-items:start;padding:26px 4px;border-bottom:1px solid var(--line)}.highlight-item h3{margin:8px 0 0;font-size:1.22rem;color:var(--ink)}.highlight-item p{margin:0;color:var(--muted)}.highlight-item>a{font-weight:800;text-align:right}.band{background:var(--ink);color:#fff;padding:74px 0}.band .eyebrow{color:#b9b0ff}.band p{color:#d7d3e1}.band .text-link{color:#fff}.split-panel{display:grid;grid-template-columns:1fr .8fr;gap:68px;align-items:center}.split-panel h2{color:#fff}.split-panel img{border-radius:24px;aspect-ratio:16/10;object-fit:cover}.text-link{display:inline-block;margin-top:10px;font-weight:800}.video-preview{padding-block:84px}.inline-heading{display:flex;align-items:end;justify-content:space-between;gap:20px;max-width:none}.preview-rows{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}.preview-rows article{background:#fff;padding:22px;border-radius:18px;border:1px solid #ebeaf5}.preview-rows strong{color:var(--ink);font-size:1.05rem}.preview-rows p{color:var(--muted);margin-bottom:0}.quiet-section{display:grid;grid-template-columns:1fr .65fr;gap:50px;align-items:center;background:var(--panel);border-radius:30px;padding:42px;margin-bottom:90px}.quiet-section img{border-radius:22px;aspect-ratio:4/3;object-fit:cover}.site-footer{background:#171522;color:#d8d5e1;padding:50px 0}.footer-grid{display:grid;grid-template-columns:1.2fr .8fr;gap:40px}.site-footer strong{color:#fff;font-size:1.15rem}.site-footer p{color:#aaa5b7;max-width:620px}.site-footer nav{display:grid;grid-template-columns:1fr 1fr;gap:10px 20px;align-content:start}.site-footer a{color:#e9e6ff}.breadcrumbs{padding-top:26px}.breadcrumbs ol{display:flex;gap:8px;list-style:none;margin:0;padding:0;font-size:.82rem;color:var(--muted)}.breadcrumbs li+li:before{content:"/";margin-right:8px;color:#aaa}.breadcrumbs a{color:var(--muted)}.article-page{padding-bottom:82px}.article-hero{padding:46px 0 34px}.article-hero.compact{max-width:880px}.article-hero h1{font-size:clamp(2.2rem,4.2vw,4.2rem)}.article-hero>img{margin-top:28px;border-radius:28px;width:100%;max-height:440px;object-fit:cover}.article-stack{display:grid;grid-template-columns:minmax(0,1fr);gap:18px;max-width:860px}.article-stack section{background:#fff;border:1px solid #e8e7f1;padding:28px 30px;border-radius:20px}.article-stack h2{color:var(--ink);margin-top:0;font-size:1.55rem}.article-stack p{color:#504c59}.next-paths{display:grid;grid-template-columns:1fr 1fr;gap:18px;margin-top:36px}.next-paths>div{background:var(--panel);padding:26px;border-radius:22px}.next-paths h2{font-size:1.35rem;margin-top:10px}.next-paths p{color:var(--muted)}.feature-stage{display:grid;grid-template-columns:.95fr 1.05fr;gap:50px;align-items:center;margin-top:16px;margin-bottom:70px}.feature-stage img{border-radius:28px;aspect-ratio:16/10;object-fit:cover}.feature-stage h2{font-size:clamp(1.8rem,3vw,3rem);line-height:1.1;color:var(--ink);margin:12px 0}.feature-stage p{font-size:1.05rem;color:var(--muted)}.group-stack{display:grid;gap:56px;padding-bottom:78px}.content-group{display:grid;grid-template-columns:.72fr 1.28fr;gap:50px}.content-group header p{color:var(--muted)}.content-index{border-top:1px solid var(--line)}.content-index>div{padding:20px 0;border-bottom:1px solid var(--line)}.content-index h3{margin:0 0 6px;color:var(--ink)}.content-index p{margin:0;color:var(--muted)}.band-tight{padding:58px 0}.reverse{grid-template-columns:.8fr 1.2fr}.dense-page{max-width:1080px}.video-cover{display:grid;grid-template-columns:1fr .7fr;gap:20px;align-items:stretch;margin:10px 0 52px}.video-cover img{width:100%;height:100%;min-height:290px;object-fit:cover;border-radius:24px}.video-cover div{display:flex;flex-direction:column;justify-content:end;background:var(--ink);color:#fff;border-radius:24px;padding:28px}.video-cover strong{font-size:1.6rem}.video-cover p{color:#ccc7d6;margin-bottom:0}.collection-block{display:grid;grid-template-columns:.6fr 1.4fr;gap:42px;padding:38px 0;border-top:1px solid var(--line)}.collection-intro p{color:var(--muted)}.collection-list{display:grid;grid-template-columns:1fr 1fr;gap:12px}.collection-list article{background:#fff;border:1px solid #e9e8f2;padding:20px;border-radius:16px}.collection-list span{color:var(--primary);font-size:.76rem;font-weight:800}.collection-list h3{margin:7px 0;color:var(--ink)}.collection-list p{margin:0;color:var(--muted)}.context-note{margin-top:24px;background:var(--panel);border-radius:22px;padding:28px}.context-note h2{font-size:1.5rem}.app-hero{display:grid;grid-template-columns:1fr .72fr;gap:48px;align-items:center;padding:50px 0}.app-hero h1{font-size:clamp(2.2rem,4vw,4rem)}.app-hero img{border-radius:26px;aspect-ratio:4/3;object-fit:cover}.app-notes{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}.app-notes article{background:#fff;padding:24px;border-radius:18px;border:1px solid #e8e7f1}.app-notes h2{font-size:1.2rem;color:var(--ink);margin-top:0}.app-notes p{color:var(--muted);margin-bottom:0}.mobile-paths{margin-top:38px;background:var(--panel);padding:28px;border-radius:22px}.mobile-paths h2{font-size:1.6rem}.mobile-paths>div{display:flex;flex-wrap:wrap;gap:12px}.faq-page{max-width:920px}.faq-list{display:grid;gap:10px}.faq-list details{background:#fff;border:1px solid #e8e7f1;border-radius:16px;padding:0 20px}.faq-list summary{cursor:pointer;font-weight:800;color:var(--ink);padding:18px 0}.faq-list p{color:var(--muted);padding:0 0 18px;margin:0}.faq-visual{margin-top:34px}.faq-visual img{border-radius:24px;max-height:360px;width:100%;object-fit:cover}.not-found{padding-block:110px;max-width:760px}.not-found h1{font-size:clamp(2.4rem,6vw,5rem);line-height:1;color:var(--ink);margin:0}.not-found p{font-size:1.08rem;color:var(--muted)}.not-found>div{display:flex;flex-wrap:wrap;gap:10px;margin-top:26px}
@media(max-width:900px){.header-inner{min-height:70px}.menu-toggle{display:inline-flex}.site-nav{display:none;position:absolute;top:70px;left:20px;right:20px;background:#fff;padding:10px;border:1px solid var(--line);border-radius:18px;box-shadow:var(--shadow);grid-template-columns:1fr}.site-nav.open{display:grid}.hero,.split-panel,.quiet-section,.feature-stage,.content-group,.video-cover,.collection-block,.app-hero{grid-template-columns:1fr}.hero{gap:32px;padding-top:46px}.hero-visual{transform:none}.highlight-item{grid-template-columns:1fr}.highlight-item>a{text-align:left}.preview-rows,.app-notes{grid-template-columns:1fr}.inline-heading{align-items:start;flex-direction:column}.quiet-section{padding:28px}.reverse img{order:2}.collection-list{grid-template-columns:1fr 1fr}.next-paths{grid-template-columns:1fr}.footer-grid{grid-template-columns:1fr}}
@media(max-width:600px){.shell{width:min(100% - 24px,1160px)}.hero h1,.article-hero h1,.app-hero h1{font-size:2.45rem}.site-header{position:relative}.hero{padding-block:34px}.hero-actions{display:grid}.button{width:100%}.focus-grid,.video-preview{padding-block:48px}.band{padding:48px 0}.preview-rows,.collection-list{grid-template-columns:1fr}.quiet-section{margin-bottom:50px}.content-group{gap:16px}.feature-stage{gap:22px}.site-footer nav{grid-template-columns:1fr}.article-stack section{padding:22px}.app-notes{gap:10px}.footer-grid{gap:22px}}
@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;transition:none!important;animation:none!important}}
:focus-visible{outline:3px solid var(--accent);outline-offset:3px}