:root{--primary:#5B4BDB;--primary-soft:#8B7CF6;--ink:#1E1B2E;--text:#292734;--muted:#6F6B7A;--bg:#F7F7FB;--soft:#EFEFFC;--accent:#F05A7E;--white:#fff;--line:#dedced;--shadow:0 18px 55px rgba(49,41,112,.10);--radius:24px;--radius-sm:16px;--max:1180px}
*{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:1.72}img{max-width:100%;height:auto;display:block}a{color:inherit;text-decoration:none}button,input{font:inherit}.shell{width:min(calc(100% - 40px),var(--max));margin-inline:auto}.narrow{width:min(calc(100% - 40px),820px)}.skip-link{position:absolute;left:-9999px;top:8px;background:var(--ink);color:white;padding:10px 14px;z-index:99}.skip-link:focus{left:8px}.site-header{position:sticky;top:0;z-index:30;background:rgba(247,247,251,.94);backdrop-filter:blur(14px);border-bottom:1px solid rgba(91,75,219,.12)}.header-shell{min-height:76px;display:flex;align-items:center;justify-content:space-between;gap:28px}.brand{display:flex;align-items:center;gap:12px}.brand img{width:44px;height:44px;object-fit:contain}.brand span{display:flex;flex-direction:column;line-height:1.15}.brand strong{font-size:1.3rem;color:var(--ink)}.brand small{margin-top:5px;color:var(--muted);font-size:.76rem}.site-nav{display:flex;align-items:center;gap:8px}.site-nav a{padding:10px 13px;border-radius:12px;color:var(--muted);font-weight:700;font-size:.94rem}.site-nav a:hover,.site-nav a[aria-current="page"]{background:var(--soft);color:var(--primary)}.menu-toggle{display:none;border:1px solid var(--line);background:#fff;border-radius:12px;padding:9px 12px;color:var(--ink)}.hero{display:grid;grid-template-columns:1.05fr .95fr;gap:48px;align-items:center;padding-block:64px}.hero-copy h1,.page-intro h1{font-size:clamp(2.25rem,5vw,4.5rem);line-height:1.08;letter-spacing:-.035em;color:var(--ink);margin:14px 0 18px}.hero-copy p,.lead{font-size:1.12rem;color:var(--muted);max-width:740px}.hero-media img,.intro-grid img,.split-feature img{border-radius:30px;box-shadow:var(--shadow);aspect-ratio:4/3;object-fit:cover}.eyebrow{display:inline-flex;align-items:center;gap:8px;color:var(--primary);font-size:.78rem;font-weight:800;letter-spacing:.08em;text-transform:uppercase}.eyebrow:before{content:"";width:18px;height:2px;background:var(--accent);border-radius:2px}.hero-actions,.inline-actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:26px}.btn{display:inline-flex;align-items:center;justify-content:center;min-height:46px;padding:0 18px;border-radius:14px;font-weight:800}.btn.primary{background:var(--primary);color:#fff;box-shadow:0 10px 28px rgba(91,75,219,.25)}.btn.secondary{background:#fff;color:var(--primary);border:1px solid var(--line)}.btn.light{background:#fff;color:var(--ink)}.hero-points{display:grid;gap:8px;margin:28px 0 0;padding:0;list-style:none;color:var(--muted);font-size:.94rem}.hero-points li{position:relative;padding-left:24px}.hero-points li:before{content:"✓";position:absolute;left:0;color:var(--primary);font-weight:900}.section-flow{padding-block:56px}.section-heading{max-width:760px;margin-bottom:28px}.section-heading.compact{max-width:680px}.section-heading h2,.split-feature h2,.callout h2{font-size:clamp(1.7rem,3vw,2.6rem);line-height:1.18;color:var(--ink);margin:10px 0 12px}.section-heading p,.split-feature p,.callout p{color:var(--muted)}.content-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px}.content-card{background:#fff;border:1px solid rgba(30,27,46,.07);border-radius:22px;overflow:hidden;box-shadow:0 10px 34px rgba(30,27,46,.05)}.content-card img{width:100%;aspect-ratio:16/10;object-fit:cover}.content-card-body{padding:22px}.content-card h3{font-size:1.22rem;line-height:1.28;color:var(--ink);margin:9px 0}.content-card p{color:var(--muted);margin:0 0 16px}.text-link{color:var(--primary);font-weight:800}.text-link:hover{text-decoration:underline}.band{padding-block:64px}.muted-band{background:var(--soft)}.dark-band{background:var(--ink);color:#fff}.dark-band h2,.dark-band p,.dark-band .eyebrow{color:#fff}.split-feature{display:grid;grid-template-columns:1fr 1fr;gap:46px;align-items:center}.split-feature.reverse>img{order:1}.split-feature.reverse>div{order:2}.topic-links{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}.topic-link{display:flex;flex-direction:column;gap:7px;padding:22px;background:#fff;border:1px solid var(--line);border-radius:18px;transition:.2s ease}.topic-link:hover{transform:translateY(-2px);border-color:rgba(91,75,219,.36);box-shadow:var(--shadow)}.topic-link strong{color:var(--ink);font-size:1.08rem}.topic-link span{color:var(--muted);font-size:.94rem}.callout{margin-block:44px 72px;padding:30px 32px;border-radius:24px;background:linear-gradient(135deg,#fff 0%,var(--soft) 100%);border:1px solid var(--line);display:flex;justify-content:space-between;align-items:center;gap:30px}.page-intro{padding-block:46px 34px}.breadcrumbs ol{display:flex;flex-wrap:wrap;gap:8px;list-style:none;padding:0;margin:0 0 22px;color:var(--muted);font-size:.88rem}.breadcrumbs li:not(:last-child):after{content:"/";margin-left:8px;color:#aaa6bc}.breadcrumbs a:hover{color:var(--primary)}.intro-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:42px;align-items:center}.two-col.reading-layout{display:grid;grid-template-columns:minmax(0,1fr) 300px;gap:48px;padding-bottom:56px}.prose{font-size:1.02rem}.prose h2{font-size:1.7rem;line-height:1.25;color:var(--ink);margin:36px 0 12px}.prose p{margin:0 0 18px}.prose a{color:var(--primary);font-weight:700}.note-box{padding:20px 22px;border-left:4px solid var(--primary);background:var(--soft);border-radius:0 16px 16px 0}.note-box p{margin:7px 0 0}.side-panel{align-self:start;position:sticky;top:104px;padding:18px;background:#fff;border:1px solid var(--line);border-radius:22px}.side-panel img{border-radius:16px;margin-bottom:16px}.side-panel h2{font-size:1rem;color:var(--ink);margin:12px 0}.side-panel a{display:block;padding:11px 0;border-top:1px solid #efedf7;color:var(--primary);font-weight:700}.dense-section .content-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.info-rows{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:18px;padding-block:24px 54px}.info-rows article{background:#fff;border:1px solid var(--line);border-radius:20px;padding:24px}.info-rows h2{font-size:1.25rem;color:var(--ink);margin:0 0 9px}.info-rows p{color:var(--muted);margin:0}.timeline{display:grid;gap:18px;padding-block:20px 56px}.timeline article{display:grid;grid-template-columns:54px 1fr;gap:18px;align-items:start;padding:24px;background:#fff;border:1px solid var(--line);border-radius:20px}.step{display:grid;place-items:center;width:44px;height:44px;border-radius:14px;background:var(--soft);color:var(--primary);font-weight:900}.timeline h2{margin:0 0 8px;color:var(--ink);font-size:1.35rem}.timeline p{margin:0;color:var(--muted)}.faq-list{display:grid;gap:12px}.faq-list details{background:#fff;border:1px solid var(--line);border-radius:16px;padding:0 18px}.faq-list summary{cursor:pointer;font-weight:800;color:var(--ink);padding:18px 0}.faq-list details div{padding:0 0 18px;color:var(--muted)}.faq-list details p{margin:0}.error-page{text-align:center;padding-block:90px}.error-code{font-size:clamp(5rem,15vw,10rem);line-height:1;color:var(--primary);font-weight:900;letter-spacing:-.06em}.error-page h1{font-size:2.4rem;color:var(--ink);margin:10px 0}.error-page p{max-width:650px;margin:0 auto;color:var(--muted)}.error-page .inline-actions{justify-content:center}.site-footer{background:#171522;color:#c9c5d7;margin-top:42px}.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr;gap:40px;padding-block:50px}.footer-grid h2{color:#fff;font-size:1rem;margin:0 0 14px}.footer-grid a{display:block;margin:8px 0;color:#ddd9ea}.footer-grid p{max-width:460px}.footer-brand{font-size:1.8rem;font-weight:900;color:#fff!important}.footer-bottom{display:flex;justify-content:space-between;gap:16px;padding:18px 0 24px;border-top:1px solid rgba(255,255,255,.1);font-size:.86rem}.menu-open{overflow:hidden}
@media(max-width:900px){.site-nav{position:fixed;left:20px;right:20px;top:86px;padding:14px;background:#fff;border:1px solid var(--line);border-radius:18px;box-shadow:var(--shadow);display:none;flex-direction:column;align-items:stretch}.site-nav.open{display:flex}.menu-toggle{display:inline-flex}.hero,.intro-grid,.split-feature,.two-col.reading-layout{grid-template-columns:1fr}.hero{padding-top:44px}.hero-media{order:-1}.hero-media img{max-height:420px;width:100%}.content-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.side-panel{position:static}.split-feature.reverse>img,.split-feature.reverse>div{order:initial}.footer-grid{grid-template-columns:1fr 1fr}.footer-grid>div:first-child{grid-column:1/-1}}
@media(max-width:620px){.shell,.narrow{width:min(calc(100% - 28px),var(--max))}.header-shell{min-height:68px}.brand small{display:none}.hero{gap:28px;padding-block:32px 46px}.hero-copy h1,.page-intro h1{font-size:2.35rem}.content-grid,.dense-section .content-grid,.topic-links,.info-rows{grid-template-columns:1fr}.callout{align-items:flex-start;flex-direction:column;padding:24px}.footer-grid{grid-template-columns:1fr}.footer-grid>div:first-child{grid-column:auto}.footer-bottom{flex-direction:column}.timeline article{grid-template-columns:42px 1fr;padding:18px}.step{width:38px;height:38px}.band{padding-block:46px}.page-intro{padding-block:34px 24px}}
@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;transition:none!important;animation:none!important}}
:focus-visible{outline:3px solid rgba(240,90,126,.55);outline-offset:3px}
/* Extended reusable content patterns for future editorial maintenance */
.media-list{display:grid;gap:16px}.media-list article{display:grid;grid-template-columns:120px 1fr;gap:18px;padding:16px;background:#fff;border:1px solid var(--line);border-radius:18px}.media-list img{width:120px;height:86px;object-fit:cover;border-radius:12px}.media-list h3{margin:0 0 6px;color:var(--ink)}.media-list p{margin:0;color:var(--muted)}.tag-row{display:flex;flex-wrap:wrap;gap:8px}.tag-row a,.tag-row span{display:inline-flex;padding:7px 10px;border-radius:999px;background:var(--soft);color:var(--primary);font-size:.84rem;font-weight:700}.metric-free-summary{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}.metric-free-summary>div{padding:18px;background:#fff;border:1px solid var(--line);border-radius:16px}.metric-free-summary strong{display:block;color:var(--ink);margin-bottom:6px}.metric-free-summary span{color:var(--muted);font-size:.9rem}.anchor-menu{display:flex;gap:8px;overflow:auto;padding-bottom:6px}.anchor-menu a{white-space:nowrap;padding:8px 12px;background:#fff;border:1px solid var(--line);border-radius:999px;color:var(--primary);font-weight:700}.quote-panel{padding:24px 26px;border-radius:22px;background:var(--ink);color:#f5f3fb}.quote-panel p{font-size:1.12rem;margin:0}.quote-panel footer{margin-top:12px;color:#bdb8ca}.comparison-table{width:100%;border-collapse:separate;border-spacing:0;background:#fff;border:1px solid var(--line);border-radius:18px;overflow:hidden}.comparison-table th,.comparison-table td{padding:14px 16px;text-align:left;border-bottom:1px solid #eceaf3}.comparison-table th{background:var(--soft);color:var(--ink)}.comparison-table tr:last-child td{border-bottom:0}.status-pill{display:inline-flex;align-items:center;gap:7px;padding:7px 10px;border-radius:999px;background:#fff0f4;color:#a82f50;font-size:.82rem;font-weight:800}.status-pill:before{content:"";width:7px;height:7px;border-radius:50%;background:var(--accent)}.stack{display:grid;gap:16px}.stack-lg{display:grid;gap:28px}.cluster{display:flex;flex-wrap:wrap;gap:12px;align-items:center}.surface{background:#fff;border:1px solid var(--line);border-radius:20px;padding:22px}.surface.soft{background:var(--soft)}.muted{color:var(--muted)}.ink{color:var(--ink)}.primary-text{color:var(--primary)}.small{font-size:.88rem}.center{text-align:center}.spacer-sm{height:16px}.spacer-md{height:28px}.spacer-lg{height:48px}@media(max-width:620px){.media-list article{grid-template-columns:1fr}.media-list img{width:100%;height:auto;aspect-ratio:16/9}.metric-free-summary{grid-template-columns:1fr}.comparison-table{font-size:.9rem}}