:root{
  --brand:#6D28D9;--brand-soft:#A78BFA;--ink:#27242D;--muted:#716B78;--deep:#17151C;--bg:#F7F5FA;--surface:#FFFFFF;--sub:#ECE8F2;--accent:#F59E0B;--line:#DED8E6;--radius:22px;--shadow:0 18px 50px rgba(23,21,28,.08);--max:1180px;--narrow:760px;
}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--bg);color:var(--ink);font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",Arial,sans-serif;line-height:1.75}img{max-width:100%;height:auto;display:block}a{color:inherit;text-decoration:none}button,input{font:inherit}.skip-link{position:fixed;left:16px;top:-100px;z-index:9999;background:var(--deep);color:#fff;padding:10px 14px;border-radius:8px}.skip-link:focus{top:12px}.site-header{position:sticky;top:0;z-index:100;background:rgba(247,245,250,.94);backdrop-filter:blur(16px);border-bottom:1px solid rgba(222,216,230,.85)}.header-inner{max-width:var(--max);margin:auto;min-height:76px;padding:0 24px;display:grid;grid-template-columns:auto 1fr auto;gap:28px;align-items:center}.brand-lockup{display:flex;align-items:center;gap:10px}.brand-lockup img{width:44px;height:44px;object-fit:cover;border-radius:12px;background:var(--sub)}.brand-lockup span{display:grid;line-height:1.2}.brand-lockup strong{font-size:20px}.brand-lockup small{margin-top:5px;color:var(--muted);font-size:12px}.primary-nav{display:flex;justify-content:center;gap:8px}.primary-nav a{padding:10px 12px;border-radius:10px;color:#514B58;font-size:14px}.primary-nav a:hover,.primary-nav a:focus-visible{background:var(--sub);color:var(--brand)}.search-trigger,.menu-toggle{border:1px solid var(--line);background:#fff;color:var(--ink);padding:9px 14px;border-radius:12px;cursor:pointer}.search-trigger:hover,.menu-toggle:hover{border-color:var(--brand);color:var(--brand)}.menu-toggle{display:none}.page-shell{max-width:var(--max);margin:auto;padding:30px 24px 84px}.home-shell{padding-top:40px}.eyebrow{text-transform:none;letter-spacing:.08em;color:var(--brand);font-size:13px;font-weight:800;margin:0 0 12px}.lead{font-size:18px;color:#4F4955;line-height:1.8;max-width:760px}.button{display:inline-flex;align-items:center;justify-content:center;min-height:46px;padding:11px 18px;border-radius:14px;background:var(--brand);color:#fff;font-weight:700;box-shadow:0 10px 24px rgba(109,40,217,.18)}.button:hover{transform:translateY(-1px)}.button-secondary{background:var(--deep)}.text-link{color:var(--brand);font-weight:700;text-decoration:underline;text-decoration-color:rgba(109,40,217,.28);text-underline-offset:4px}.accent-link{color:#8A4E00!important;background:#FFF3D9!important}.action-row{display:flex;flex-wrap:wrap;align-items:center;gap:16px;margin-top:26px}.home-intro{display:grid;grid-template-columns:minmax(0,1.04fr) minmax(340px,.96fr);gap:50px;align-items:center;padding:18px 0 64px}.intro-copy h1{font-size:clamp(38px,5vw,70px);line-height:1.08;letter-spacing:-.04em;margin:0 0 24px;max-width:760px}.intro-visual{margin:0;background:var(--deep);border-radius:32px;padding:12px;box-shadow:var(--shadow);transform:rotate(1deg)}.intro-visual img{border-radius:22px;aspect-ratio:1.42;object-fit:cover}.intro-visual figcaption{color:#CFC7D8;font-size:13px;padding:12px 10px 4px}.split-section{display:grid;grid-template-columns:.8fr 1.2fr;gap:60px;padding:72px 0;border-top:1px solid var(--line)}.section-heading h2,.split-section h2,.video-focus h2,.free-note h2,.topic-map h2,.ciyuan-teaser h2,.home-search-band h2{font-size:clamp(28px,3vw,42px);line-height:1.2;letter-spacing:-.025em;margin:0 0 18px}.section-heading p,.split-section p{color:var(--muted)}.narrow{max-width:470px}.editorial-list{border-top:1px solid var(--line)}.editorial-list article{display:grid;grid-template-columns:58px 1fr;gap:20px;padding:24px 0;border-bottom:1px solid var(--line)}.editorial-list .index-mark{font-variant-numeric:tabular-nums;color:var(--brand-soft);font-weight:800}.editorial-list h3{font-size:20px;margin:0 0 8px}.editorial-list h3 a:hover{color:var(--brand)}.editorial-list p{margin:0;color:var(--muted)}.video-focus{background:var(--deep);color:#fff;border-radius:34px;padding:44px;margin:36px 0 74px}.video-heading{display:grid;grid-template-columns:1.2fr .8fr;gap:32px;align-items:end;margin-bottom:32px}.video-heading p:not(.eyebrow){color:#C8C0CF}.video-heading img{border-radius:22px;aspect-ratio:1.5;object-fit:cover}.video-index{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}.video-index-item{background:#211E28;border:1px solid #312C38;border-radius:20px;overflow:hidden}.video-index-item.is-featured{grid-column:span 2}.video-index-item img{width:100%;aspect-ratio:1.65;object-fit:cover}.video-index-item>div{padding:20px}.video-index-item h3{margin:8px 0 10px;font-size:18px;line-height:1.45}.video-index-item p{margin:0;color:#BFB8C5;font-size:14px}.video-index-item a:hover{color:var(--brand-soft)}.meta-tag{display:inline-flex;color:var(--brand);font-weight:800;font-size:12px}.video-focus .meta-tag{color:#D7C8FF}.section-action{margin-top:26px;display:flex;justify-content:flex-end}.free-note{display:grid;grid-template-columns:.9fr 1.1fr;gap:48px;align-items:center;padding:64px 0;border-bottom:1px solid var(--line)}.free-visual img{border-radius:28px;aspect-ratio:1.25;object-fit:cover}.link-list{list-style:none;padding:0;margin:24px 0}.link-list li{padding:16px 0;border-top:1px solid var(--line);display:grid;gap:6px}.link-list a{font-weight:800}.link-list a:hover{color:var(--brand)}.link-list span{color:var(--muted);font-size:14px}.topic-map{padding:72px 0}.topic-map-grid{display:grid;grid-template-columns:1fr 1fr;border-top:1px solid var(--line);margin-top:30px}.topic-line{display:grid;grid-template-columns:130px 1fr;gap:20px;padding:22px;border-bottom:1px solid var(--line)}.topic-line:nth-child(odd){border-right:1px solid var(--line)}.topic-line:hover{background:#fff}.topic-line img{width:130px;height:90px;object-fit:cover;border-radius:14px}.topic-line span{display:grid;align-content:center;gap:8px}.topic-line strong{font-size:18px}.topic-line small{color:var(--muted);line-height:1.55}.ciyuan-teaser{display:grid;grid-template-columns:1.15fr .85fr;gap:46px;background:var(--sub);border-radius:30px;padding:36px 42px;margin:20px 0 74px}.ciyuan-teaser p:not(.eyebrow){color:#5C5563}.compact-links{display:grid;gap:10px;align-content:center}.compact-links a{display:block;padding:12px 14px;background:#fff;border-radius:12px;font-weight:700}.compact-links a:hover{color:var(--brand)}.home-search-band{display:grid;grid-template-columns:1fr .9fr;gap:42px;align-items:end;padding:42px;background:#fff;border:1px solid var(--line);border-radius:28px}.inline-search{display:flex;gap:10px}.inline-search input,.search-row input,.article-aside input{min-width:0;flex:1;border:1px solid var(--line);background:#fff;border-radius:12px;padding:12px 14px;color:var(--ink)}.inline-search button,.search-row button,.article-aside button{border:0;border-radius:12px;padding:12px 16px;background:var(--brand);color:#fff;font-weight:700;cursor:pointer}.breadcrumbs{margin:4px 0 28px}.breadcrumbs ol{display:flex;gap:10px;flex-wrap:wrap;list-style:none;padding:0;margin:0;font-size:13px;color:var(--muted)}.breadcrumbs li:not(:last-child)::after{content:'›';margin-left:10px;color:#A59CAA}.breadcrumbs a:hover{color:var(--brand)}.category-hero,.simple-hero,.article-header{display:grid;grid-template-columns:1.08fr .92fr;gap:52px;align-items:center;padding:22px 0 54px}.category-hero h1,.simple-hero h1,.article-header h1,.text-hero h1,.search-hero h1{font-size:clamp(34px,4.8vw,62px);line-height:1.1;letter-spacing:-.04em;margin:0 0 22px}.category-hero img,.simple-hero img,.article-header img{border-radius:28px;aspect-ratio:1.45;object-fit:cover;box-shadow:var(--shadow)}.panel{background:#fff;border:1px solid var(--line);border-radius:24px;padding:28px}.category-intro{max-width:900px;margin:0 0 58px}.category-intro h2{font-size:28px;margin:0 0 14px}.category-intro p{color:var(--muted);margin:0}.article-directory{padding-top:10px}.directory-list{margin-top:30px;border-top:1px solid var(--line)}.directory-list article{display:grid;grid-template-columns:72px 1fr;gap:28px;padding:28px 0;border-bottom:1px solid var(--line)}.directory-num{font-size:28px;color:#B2A8BA;font-weight:800;font-variant-numeric:tabular-nums}.directory-list h3{font-size:22px;margin:6px 0 8px;line-height:1.35}.directory-list h3 a:hover{color:var(--brand)}.directory-list p{margin:0 0 12px;color:var(--muted);max-width:860px}.reading-note{display:grid;grid-template-columns:.78fr 1.22fr;gap:40px;align-items:center;margin-top:72px;padding:34px;background:var(--sub);border-radius:28px}.reading-note img{border-radius:20px;aspect-ratio:1.45;object-fit:cover}.reading-note h2{font-size:30px;margin:0 0 12px}.reading-note p{color:var(--muted)}.media-strip{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;margin-top:72px}.media-strip>div{background:#fff;border:1px solid var(--line);border-radius:20px;overflow:hidden}.media-strip img{width:100%;aspect-ratio:1.55;object-fit:cover}.media-strip p{margin:0;padding:16px;color:var(--muted)}.ciyuan-return{margin-top:60px}.article-header{padding-bottom:44px}.article-meta{display:flex;gap:14px;color:var(--muted);font-size:13px}.article-layout{display:grid;grid-template-columns:minmax(0,1fr) 290px;gap:58px;align-items:start}.article-body{max-width:780px}.article-body section{padding:0 0 34px;margin-bottom:34px;border-bottom:1px solid var(--line)}.article-body h2{font-size:28px;line-height:1.35;margin:0 0 18px}.article-body p{font-size:17px;line-height:2;margin:0;color:#3F3A45}.article-aside{position:sticky;top:106px;display:grid;gap:16px}.aside-box{background:#fff;border:1px solid var(--line);border-radius:18px;padding:20px}.aside-box strong{display:block;margin-bottom:10px}.aside-box>a{color:var(--brand);font-weight:800}.aside-box p{font-size:13px;color:var(--muted);margin:10px 0 0}.aside-box form{display:grid;gap:8px}.related-section{padding-top:68px}.related-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:16px}.related-grid a{display:grid;gap:7px;padding:22px;background:#fff;border:1px solid var(--line);border-radius:18px}.related-grid a:hover{border-color:var(--brand-soft)}.related-grid span{font-size:12px;color:var(--brand);font-weight:800}.related-grid strong{font-size:18px}.related-grid small{color:var(--muted);line-height:1.55}.search-hero{max-width:900px;padding:26px 0 44px}.search-hero p{color:var(--muted)}.search-results{margin-top:24px}.empty-state{margin-top:18px}.faq-list{display:grid;gap:12px;max-width:900px;margin:0 auto}.faq-list details{background:#fff;border:1px solid var(--line);border-radius:18px;padding:0 22px}.faq-list summary{cursor:pointer;font-weight:800;font-size:18px;padding:20px 34px 20px 0;position:relative}.faq-list summary::after{content:'+';position:absolute;right:0;top:19px;color:var(--brand);font-size:22px}.faq-list details[open] summary::after{content:'−'}.faq-list details div{padding:0 0 20px;color:var(--muted)}.guide-steps{display:grid;grid-template-columns:1fr 1fr;gap:18px}.guide-steps article{background:#fff;border:1px solid var(--line);border-radius:22px;padding:28px}.guide-steps span{color:var(--brand-soft);font-size:26px;font-weight:800}.guide-steps h2{font-size:24px;margin:14px 0 10px}.guide-steps p{color:var(--muted)}.prose-grid,.safety-list,.contact-guide{display:grid;grid-template-columns:1fr 1fr;gap:18px}.prose-grid article,.safety-list article,.contact-guide article{background:#fff;border:1px solid var(--line);border-radius:22px;padding:28px}.prose-grid h2,.safety-list h2,.contact-guide h2{font-size:24px;margin-top:0}.prose-grid p,.safety-list p,.contact-guide p{color:var(--muted)}.contact-guide span{color:var(--brand);font-weight:800}.narrow-page{max-width:920px}.text-hero{padding:30px 0 48px}.prose-flow{background:#fff;border:1px solid var(--line);border-radius:24px;padding:38px}.prose-flow h2{font-size:26px;margin:34px 0 10px}.prose-flow h2:first-child{margin-top:0}.prose-flow p{color:#4B4551}.not-found{max-width:760px;margin:80px auto}.search-modal{position:fixed;inset:0;z-index:400;background:rgba(23,21,28,.58);display:grid;place-items:start center;padding:12vh 20px 20px}.search-modal[hidden]{display:none!important}.search-dialog{position:relative;width:min(680px,100%);background:var(--bg);border-radius:24px;padding:34px;box-shadow:0 30px 90px rgba(0,0,0,.28)}.search-dialog h2{font-size:30px;margin:0 0 18px}.modal-close{position:absolute;right:16px;top:14px;width:38px;height:38px;border:1px solid var(--line);border-radius:50%;background:#fff;cursor:pointer;font-size:22px}.search-form label{display:block;font-weight:700;margin-bottom:8px}.search-row{display:flex;gap:10px}.site-footer{background:var(--deep);color:#F6F1FA;padding:56px 24px 24px}.footer-grid{max-width:var(--max);margin:auto;display:grid;grid-template-columns:1.4fr .8fr .8fr;gap:50px}.site-footer p{color:#BEB6C6;max-width:520px}.site-footer nav{display:grid;gap:9px;align-content:start}.site-footer nav a{color:#D6CEDD;font-size:14px}.site-footer nav a:hover{color:#fff}.footer-title{font-size:16px;margin:0 0 10px;color:#fff}.footer-bottom{max-width:var(--max);margin:38px auto 0;padding-top:20px;border-top:1px solid #37313F;display:flex;justify-content:space-between;color:#9F96A8;font-size:13px}.back-top{position:fixed;right:22px;bottom:22px;width:44px;height:44px;border:0;border-radius:50%;background:var(--brand);color:#fff;cursor:pointer;box-shadow:var(--shadow)}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}
@media(max-width:1024px){.header-inner{grid-template-columns:auto auto auto;justify-content:space-between}.primary-nav{position:absolute;top:76px;left:0;right:0;display:none;background:var(--bg);padding:14px 24px 20px;border-bottom:1px solid var(--line);flex-wrap:wrap;justify-content:flex-start}.primary-nav.is-open{display:flex}.menu-toggle{display:inline-flex}.home-intro,.category-hero,.simple-hero,.article-header{grid-template-columns:1fr;gap:28px}.intro-visual{max-width:760px;transform:none}.split-section{grid-template-columns:1fr;gap:28px}.narrow{max-width:none}.video-heading{grid-template-columns:1fr}.free-note{grid-template-columns:1fr}.article-layout{grid-template-columns:1fr}.article-aside{position:static;grid-template-columns:1fr 1fr}.home-search-band{grid-template-columns:1fr}.ciyuan-teaser{grid-template-columns:1fr}.footer-grid{grid-template-columns:1fr 1fr}.footer-grid section{grid-column:1/-1}}
@media(max-width:768px){.page-shell{padding-left:18px;padding-right:18px}.header-inner{padding:0 18px;gap:12px}.brand-lockup small{display:none}.home-intro{padding-bottom:46px}.intro-copy h1{font-size:42px}.video-focus{margin-left:-4px;margin-right:-4px;padding:26px 20px;border-radius:24px}.video-index{grid-template-columns:1fr 1fr}.video-index-item.is-featured{grid-column:span 2}.topic-map-grid{grid-template-columns:1fr}.topic-line:nth-child(odd){border-right:0}.reading-note{grid-template-columns:1fr}.media-strip{grid-template-columns:1fr}.guide-steps,.prose-grid,.safety-list,.contact-guide{grid-template-columns:1fr}.related-grid{grid-template-columns:1fr}.article-aside{grid-template-columns:1fr}.footer-grid{grid-template-columns:1fr}.footer-grid section{grid-column:auto}.footer-bottom{flex-direction:column;gap:8px}.search-row,.inline-search{flex-direction:column}.category-hero h1,.simple-hero h1,.article-header h1,.text-hero h1,.search-hero h1{font-size:40px}}
@media(max-width:600px){.search-trigger{display:none}.header-inner{grid-template-columns:1fr auto}.brand-lockup strong{font-size:18px}.home-shell{padding-top:20px}.home-intro{gap:22px}.intro-copy h1{font-size:36px}.lead{font-size:16px}.action-row{align-items:stretch;flex-direction:column}.action-row .button,.action-row .text-link{text-align:center}.video-index{grid-template-columns:1fr}.video-index-item.is-featured{grid-column:auto}.topic-line{grid-template-columns:92px 1fr;padding:16px 0}.topic-line img{width:92px;height:72px}.ciyuan-teaser,.home-search-band{padding:26px 20px;border-radius:22px}.directory-list article{grid-template-columns:42px 1fr;gap:14px}.directory-num{font-size:18px}.directory-list h3{font-size:19px}.category-hero,.simple-hero,.article-header{padding-top:6px}.article-body p{font-size:16px}.article-body h2{font-size:24px}.search-dialog{padding:28px 20px}.site-footer{padding-left:20px;padding-right:20px}}
@media(max-width:375px){.page-shell{padding-left:14px;padding-right:14px}.header-inner{padding:0 14px}.brand-lockup img{width:38px;height:38px}.intro-copy h1,.category-hero h1,.simple-hero h1,.article-header h1,.text-hero h1,.search-hero h1{font-size:32px}.video-focus{padding-left:16px;padding-right:16px}.topic-line{grid-template-columns:1fr}.topic-line img{width:100%;height:150px}.directory-list article{grid-template-columns:1fr}.directory-num{font-size:14px}.prose-flow{padding:24px 20px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}.button:hover{transform:none}}