:root{
  --primary:#6C4FF8;--primary-soft:#9B8AFB;--ink:#252331;--muted:#716E7E;--deep:#1E1B2E;
  --bg:#F7F6FB;--surface:#FFFFFF;--surface-2:#EEEAF8;--accent:#F06A8A;--line:#DDD8EA;
  --radius:24px;--radius-sm:16px;--shadow:0 20px 60px rgba(30,27,46,.09);--shell:min(1160px,calc(100% - 40px));
}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;font-family:Inter,ui-sans-serif,system-ui,-apple-system,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;background:var(--bg);color:var(--ink);line-height:1.75;font-size:16px}img{max-width:100%;height:auto;display:block}a{color:inherit;text-decoration:none}button,input,textarea,select{font:inherit}.shell{width:var(--shell);margin-inline:auto}.skip-link{position:fixed;left:12px;top:12px;z-index:999;background:#fff;padding:10px 14px;border-radius:10px;transform:translateY(-160%);box-shadow:var(--shadow)}.skip-link:focus{transform:none}
.site-header{position:sticky;top:0;z-index:50;background:rgba(247,246,251,.94);backdrop-filter:blur(18px);border-bottom:1px solid rgba(221,216,234,.8)}.header-inner{min-height:78px;display:flex;align-items:center;gap:28px}.brand{display:inline-flex;align-items:center;gap:12px;min-width:max-content}.brand img{width:44px;height:44px;object-fit:cover;border-radius:13px;background:var(--surface-2)}.brand span{display:flex;flex-direction:column;line-height:1.18}.brand strong{font-size:1.08rem;color:var(--deep)}.brand small{font-size:.76rem;color:var(--muted);margin-top:4px}.site-nav{margin-left:auto;display:flex;gap:4px;align-items:center}.nav-link{padding:9px 12px;border-radius:12px;color:var(--muted);font-size:.92rem}.nav-link strong{font-weight:650}.nav-link:hover,.nav-link:focus-visible,.nav-link.is-active{background:var(--surface-2);color:var(--deep)}.menu-toggle{display:none;border:1px solid var(--line);background:#fff;color:var(--ink);border-radius:12px;padding:8px 12px}.hero{padding:82px 0 66px;display:grid;grid-template-columns:1.05fr .95fr;gap:58px;align-items:center}.eyebrow{margin:0 0 10px;color:var(--primary);font-weight:760;letter-spacing:.06em;font-size:.86rem}.hero h1,.page-intro h1{font-size:clamp(2.35rem,5vw,4.7rem);line-height:1.05;letter-spacing:-.04em;margin:.15em 0 .28em;color:var(--deep)}.page-intro h1{font-size:clamp(2.1rem,4.5vw,4rem)}.lede{font-size:1.12rem;color:var(--muted);max-width:720px}.hero-actions{display:flex;gap:12px;flex-wrap:wrap;margin:28px 0}.button{display:inline-flex;align-items:center;justify-content:center;min-height:48px;padding:11px 18px;border-radius:14px;font-weight:720;border:1px solid transparent}.button.primary{background:var(--primary);color:#fff;box-shadow:0 12px 24px rgba(108,79,248,.24)}.button.primary:hover{background:#5c40eb}.button.secondary{background:#fff;border-color:var(--line);color:var(--deep)}.hero-points{padding:0;margin:24px 0 0;list-style:none;display:grid;gap:8px;color:var(--muted)}.hero-points li{position:relative;padding-left:24px}.hero-points li:before{content:"";position:absolute;left:3px;top:.72em;width:7px;height:7px;border-radius:50%;background:var(--accent)}.hero-art{margin:0;background:linear-gradient(145deg,#e8e3fb,#fff 68%);padding:14px;border-radius:30px;box-shadow:var(--shadow)}.hero-art img{border-radius:22px;aspect-ratio:1.4/1;object-fit:cover}.hero-art figcaption{font-size:.85rem;color:var(--muted);padding:11px 8px 3px}.section{padding:70px 0}.section-heading{max-width:800px;margin-bottom:30px}.section-heading.narrow{max-width:720px}.section h2{font-size:clamp(1.7rem,3vw,2.7rem);line-height:1.14;letter-spacing:-.025em;margin:.15em 0 .42em;color:var(--deep)}.section h3{font-size:1.12rem;line-height:1.35;color:var(--deep);margin:.2em 0 .45em}.section p{color:var(--muted)}.feature-list{display:grid;border-top:1px solid var(--line)}.feature-row{display:grid;grid-template-columns:30px 1fr;gap:18px;padding:26px 0;border-bottom:1px solid var(--line)}.feature-row p{margin:.25em 0 0}.feature-mark{width:14px;height:14px;border-radius:50%;background:var(--primary-soft);margin-top:7px;box-shadow:0 0 0 7px rgba(155,138,251,.16)}.inline-cta{margin-top:24px;display:flex;justify-content:space-between;align-items:center;padding:18px 20px;border-radius:16px;background:var(--deep);color:#fff}.inline-cta b{font-size:1.4rem}.split-band,.muted-section{background:var(--surface-2)}.split-layout{display:grid;grid-template-columns:.95fr 1.05fr;gap:54px;align-items:center}.split-layout.reverse .visual-card{order:2}.visual-card{background:#fff;border-radius:26px;padding:12px;box-shadow:var(--shadow)}.visual-card img{border-radius:19px;aspect-ratio:1.45/1;object-fit:cover}.content-stack p{max-width:660px}.link-stack{display:grid;gap:10px;margin-top:24px}.link-stack a{background:rgba(255,255,255,.72);border:1px solid rgba(221,216,234,.9);padding:16px;border-radius:14px}.link-stack span{display:block;color:var(--muted);font-size:.91rem;margin-top:3px}.device-layout{display:grid;grid-template-columns:.8fr 1.2fr;gap:38px;align-items:start}.device-layout figure{margin:0;position:sticky;top:110px;background:var(--surface-2);padding:12px;border-radius:24px}.device-layout img{border-radius:18px;aspect-ratio:1.3/1;object-fit:cover}.info-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}.info-grid.single-column{grid-template-columns:1fr}.info-card{background:var(--surface);border:1px solid var(--line);border-radius:18px;padding:22px}.info-card p{margin:.35em 0}.text-link{display:inline-flex;margin-top:10px;color:var(--primary);font-weight:720}.center-action{text-align:center;margin-top:28px}.related-links{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}.related-links a{display:flex;flex-direction:column;gap:5px;background:#fff;border:1px solid var(--line);padding:20px;border-radius:18px;transition:.2s ease}.related-links a:hover{transform:translateY(-2px);box-shadow:var(--shadow)}.related-links span{color:var(--muted);font-size:.92rem}.site-footer{margin-top:55px;background:var(--deep);color:#fff;padding:56px 0 18px}.footer-grid{display:grid;grid-template-columns:1.35fr .8fr 1fr;gap:48px}.site-footer p,.site-footer small{color:#c9c3db}.site-footer h2{font-size:1rem;margin:0 0 12px}.site-footer ul{margin:0;padding:0;list-style:none;display:grid;gap:9px;color:#ded9ea}.footer-brand strong{color:#fff}.footer-bottom{margin-top:42px;padding-top:18px;border-top:1px solid rgba(255,255,255,.14);display:flex;justify-content:space-between;color:#aaa3be;font-size:.86rem}.inner-main{padding-top:22px}.breadcrumbs{font-size:.86rem;color:var(--muted);padding-top:15px}.breadcrumbs ol{display:flex;gap:8px;list-style:none;padding:0;margin:0;flex-wrap:wrap}.breadcrumbs li:not(:last-child):after{content:"/";margin-left:8px;color:#aaa4b9}.page-intro{padding:52px 0 48px;display:grid;grid-template-columns:1.12fr .88fr;gap:50px;align-items:center}.page-intro figure{margin:0;background:var(--surface-2);padding:12px;border-radius:24px}.page-intro img{border-radius:17px;aspect-ratio:1.48/1;object-fit:cover}.compact-intro{padding-bottom:26px}.reading-column{max-width:950px}.article-layout{display:grid;grid-template-columns:1.4fr .6fr;gap:28px;align-items:start}.prose-card,.side-note{background:#fff;border:1px solid var(--line);border-radius:22px;padding:30px}.prose-card p{font-size:1.02rem}.prose-card h3{margin-top:1.6em}.side-note{position:sticky;top:110px}.side-note img{border-radius:15px;margin-bottom:18px;aspect-ratio:1.33/1;object-fit:cover}.prose-wide{max-width:980px}.detail-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:0;border-top:1px solid var(--line);border-left:1px solid var(--line)}.detail-grid>div{padding:22px;border-right:1px solid var(--line);border-bottom:1px solid var(--line);background:rgba(255,255,255,.62)}.identity-panel{display:grid;grid-template-columns:.85fr 1.15fr;gap:18px}.identity-primary{background:var(--deep);color:#fff;padding:34px;border-radius:22px}.identity-primary h2{color:#fff;word-break:break-all}.identity-primary p{color:#d2cce0}.identity-notes{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}.identity-notes>div{background:#fff;border:1px solid var(--line);border-radius:18px;padding:20px}.steps-section{display:grid;grid-template-columns:.9fr 1.1fr;gap:44px;align-items:center}.steps-visual{background:var(--surface-2);padding:12px;border-radius:24px}.steps-visual img{border-radius:18px}.numbered{padding-left:1.25rem;color:var(--muted)}.numbered li{padding:10px 0;border-bottom:1px solid var(--line)}.numbered strong{color:var(--deep)}.not-found{min-height:56vh;display:flex;flex-direction:column;justify-content:center}.not-found>p{max-width:600px}
@media (max-width:900px){:root{--shell:min(100% - 28px,760px)}.header-inner{min-height:68px}.menu-toggle{display:block;margin-left:auto}.site-nav{display:none;position:absolute;top:68px;left:14px;right:14px;background:#fff;border:1px solid var(--line);border-radius:18px;padding:10px;box-shadow:var(--shadow);flex-direction:column;align-items:stretch}.site-nav.is-open{display:flex}.nav-link{padding:12px}.hero,.page-intro,.split-layout,.device-layout,.article-layout,.identity-panel,.steps-section{grid-template-columns:1fr}.hero{padding-top:54px;gap:32px}.page-intro{gap:26px}.device-layout figure,.side-note{position:static}.split-layout.reverse .visual-card{order:0}.footer-grid{grid-template-columns:1fr 1fr}.footer-grid>div:first-child{grid-column:1/-1}.identity-notes{grid-template-columns:1fr}.info-grid{grid-template-columns:1fr}.section{padding:52px 0}}
@media (max-width:620px){:root{--shell:calc(100% - 24px);--radius:18px}.brand small{display:none}.hero h1,.page-intro h1{font-size:2.35rem}.hero-actions{flex-direction:column}.button{width:100%}.related-links,.detail-grid{grid-template-columns:1fr}.footer-grid{grid-template-columns:1fr}.footer-grid>div:first-child{grid-column:auto}.footer-bottom{flex-direction:column;gap:8px}.section{padding:42px 0}.prose-card,.side-note{padding:22px}.hero-art{padding:9px;border-radius:22px}.hero-art img{border-radius:16px}.detail-grid{border-left:0}.detail-grid>div{border-left:1px solid var(--line)}}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*:before,*:after{scroll-behavior:auto!important;transition:none!important;animation:none!important}}
:focus-visible{outline:3px solid rgba(108,79,248,.45);outline-offset:3px}

.faq-list{display:grid;gap:10px;max-width:960px}.faq-item{background:#fff;border:1px solid var(--line);border-radius:16px;padding:0 18px}.faq-item summary{cursor:pointer;font-weight:720;color:var(--deep);padding:17px 28px 17px 0;position:relative;list-style:none}.faq-item summary::-webkit-details-marker{display:none}.faq-item summary:after{content:"+";position:absolute;right:0;top:14px;font-size:1.35rem;color:var(--primary)}.faq-item[open] summary:after{content:"−"}.faq-item div{padding:0 0 17px}.faq-item p{margin:0}.checklist-section .info-card{border-left:4px solid var(--primary-soft)}

.search-shortcut{margin-left:4px;border:1px solid var(--line);background:#fff;padding:8px 11px;border-radius:11px;font-size:.88rem;font-weight:700}.search-page{max-width:980px}.search-form{background:var(--surface-2);border-radius:20px;padding:22px;margin-bottom:34px}.search-form label{display:block;font-weight:720;color:var(--deep);margin-bottom:8px}.search-form>div{display:grid;grid-template-columns:1fr auto;gap:10px}.search-form input{min-width:0;border:1px solid var(--line);background:#fff;border-radius:12px;padding:12px 14px;color:var(--ink)}.search-form button{border:0;background:var(--primary);color:#fff;border-radius:12px;padding:10px 20px;font-weight:720;cursor:pointer}.chip-list{display:flex;gap:9px;flex-wrap:wrap}.chip-list a{background:#fff;border:1px solid var(--line);border-radius:999px;padding:7px 12px;color:var(--deep)}.search-results{margin-top:32px}.search-result-list{display:grid;gap:12px}.search-result{background:#fff;border:1px solid var(--line);border-radius:17px;padding:20px}.search-result h3{margin:.15em 0 .35em}.search-result p{margin:.15em 0}.empty-state{background:#fff;border:1px dashed var(--line);border-radius:18px;padding:24px;margin-bottom:18px}@media(max-width:900px){.search-shortcut{margin-left:0}.header-inner .search-shortcut{margin-left:0}}@media(max-width:620px){.search-form>div{grid-template-columns:1fr}.search-form button{min-height:46px}}