@charset "UTF-8";
:root{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;--blue:#315ee7;--ink:#1b2a3d;--paper:#fff;--line:#e5eaf1;--content:1200px;--nav-height:72px;--mobile-nav-height:56px;--body-size:16px;color:var(--ink);background:var(--paper);font-size:var(--body-size);line-height:1.6}*{box-sizing:border-box}body{margin:0}a{color:inherit;text-decoration:none}a:hover{color:var(--blue)}a:focus-visible,button:focus-visible{outline:2px solid var(--blue);outline-offset:4px}button{font:inherit;cursor:pointer}.container{max-width:calc(var(--content) + 48px);padding:0 24px;margin:auto;min-width:0}img{max-width:100%;height:auto}h1,h2,h3,p{margin-top:0}h1{font-size:clamp(30px,3.6vw,48px);line-height:1.25;letter-spacing:-.8px;overflow-wrap:anywhere}h2{font-size:26px;line-height:1.4;overflow-wrap:anywhere}h3{font-size:19px;line-height:1.5;overflow-wrap:anywhere}.site-header{border-bottom:1px solid var(--line)}.header-inner{min-height:var(--nav-height);display:flex;align-items:center;justify-content:space-between;gap:24px;padding-top:12px;padding-bottom:12px}.wordmark{font-size:21px;font-weight:750;display:inline-flex;align-items:center;gap:12px;overflow-wrap:anywhere;min-width:0}.site-logo{max-width:120px;max-height:44px;width:auto;height:auto}.site-header nav{display:flex;align-items:center;gap:12px 24px;flex-wrap:wrap;font-size:15px}.site-header nav a{overflow-wrap:anywhere}.site-header nav a[aria-current]{color:var(--blue)}.breadcrumbs{display:flex;flex-wrap:wrap;gap:10px;font-size:14px;color:#68788e;padding-top:28px;overflow-wrap:anywhere}.page-hero{padding:64px 0 52px;min-width:0}.page-hero>div:first-child{max-width:850px}.page-hero.has-image{display:grid;grid-template-columns:minmax(0,1.15fr) minmax(0,1fr);gap:48px;align-items:center}.page-hero.compact{padding-top:32px;padding-bottom:32px}.page-intro{font-size:18px;line-height:1.8;white-space:pre-line;overflow-wrap:anywhere;color:#586b83}.accent-rule{width:40px;height:4px;background:var(--blue);margin-bottom:24px}.hero-image img,.block-image img{display:block;width:100%;height:auto;border-radius:14px}.page-section{padding:36px 0 42px;border-top:1px solid var(--line);min-width:0}.section-title{display:flex;justify-content:space-between;align-items:center;gap:20px;margin-bottom:24px}.section-title h2{margin:0}.section-title>a{font-size:14px;flex-shrink:0}.page-prose{overflow-wrap:anywhere;line-height:1.8}.page-prose a,.article-body a{text-decoration:underline;text-underline-offset:3px}.page-prose>:last-child{margin-bottom:0}.section-intro{margin-bottom:28px;max-width:850px}.block-text.has-image{display:grid;grid-template-columns:minmax(0,1.4fr) minmax(0,1fr);gap:36px;align-items:start}.page-buttons{display:flex;gap:12px;flex-wrap:wrap;margin-top:24px}.page-button{display:inline-flex;justify-content:space-between;align-items:center;gap:20px;padding:10px 18px;border:1px solid var(--line);border-radius:7px;font-size:15px;max-width:100%;overflow-wrap:anywhere}.page-button:first-child{color:var(--blue);border-color:var(--blue)}.info-cards{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px}.info-card{padding:24px;border:1px solid var(--line);border-radius:12px;min-width:0}.info-card>img{display:block;border-radius:8px;margin-bottom:20px}.faq-list{max-width:960px}.faq-list section{padding:18px 0;border-bottom:1px solid var(--line)}.faq-list h3{margin-bottom:10px}.faq-list p{white-space:pre-line;overflow-wrap:anywhere;margin-bottom:0}.article-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:0 32px}.article-card{padding:22px 0;border-bottom:1px solid var(--line);min-width:0}.article-card-link{display:flex;gap:20px;align-items:flex-start}.article-thumb{display:block;width:140px;aspect-ratio:4/3;border-radius:8px;overflow:hidden;flex-shrink:0}.article-thumb img{display:block;width:100%;height:100%;object-fit:contain;object-position:center}.article-card-link>div{min-width:0}.article-card h3{margin-bottom:8px}.article-card p{font-size:14px;color:#65768b;margin-bottom:9px;display:-webkit-box;-webkit-box-orient:vertical;-webkit-line-clamp:2;overflow:hidden}.article-card time{font-size:13px;color:#728095}.featured .article-card:first-child .article-card-link{display:block}.featured .article-card:first-child .article-thumb{width:100%;margin-bottom:16px}.empty-content{border:1px dashed #dae2ed;border-radius:10px;padding:38px 20px;text-align:center;color:#77869a;background:#fafbfd}.carousel-controls{display:flex;justify-content:flex-end;align-items:center;gap:16px;padding-top:20px;font-size:14px;flex-wrap:wrap}.carousel-controls[hidden],.article-card[hidden]{display:none}.carousel-controls button{border:1px solid var(--line);border-radius:6px;background:transparent;color:inherit;padding:7px 12px}.article-detail{max-width:900px;margin:40px auto 60px}.article-detail h1{font-size:clamp(28px,3.4vw,42px)}.article-meta{display:flex;gap:20px;flex-wrap:wrap;font-size:14px;color:#66768a;margin:18px 0 26px}.article-summary{font-size:18px;line-height:1.8;color:#617186}.article-body{line-height:1.9;overflow-wrap:anywhere}.article-body img,.article-cover,.article-image{display:block;max-width:100%;height:auto;margin:28px auto}.article-body h2{margin:36px 0 16px}.article-body h3{margin:28px 0 14px}.article-body blockquote{border-left:3px solid var(--blue);padding:8px 20px;margin-left:0;color:#617186}.pagination{display:flex;justify-content:center;gap:24px;margin-top:28px;flex-wrap:wrap}.site-footer{border-top:1px solid var(--line);padding:30px 0 22px;background:#fafbfd;color:#607086;font-size:14px}.site-footer .wordmark{font-size:19px;color:var(--ink);margin-bottom:16px;max-width:100%}.site-footer .wordmark>span{min-width:0}.site-footer p{max-width:960px;margin-bottom:12px;white-space:pre-line;overflow-wrap:anywhere}.footer-links{display:flex;gap:12px 24px;flex-wrap:wrap;margin:18px 0}.footer-links a{overflow-wrap:anywhere}.footer-bottom{display:flex;justify-content:space-between;gap:20px;flex-wrap:wrap;border-top:1px solid var(--line);padding-top:18px;margin-top:22px;font-size:13px}.status-page{padding-top:15vh;min-height:80vh}.status-page h1{font-size:32px}@media(max-width:760px){.container{padding-left:16px;padding-right:16px}.header-inner{min-height:var(--mobile-nav-height);flex-wrap:wrap;gap:12px}.wordmark{font-size:20px}.site-header nav{width:100%;gap:10px 18px;font-size:14px}.site-logo{max-height:36px;max-width:95px}.page-hero{padding:36px 0}.page-hero.has-image,.block-text.has-image{grid-template-columns:1fr;gap:24px}.page-intro{font-size:16px}.page-section{padding:28px 0}.section-title{align-items:flex-start;gap:12px}.section-title h2{font-size:22px}.section-title>a{font-size:13px}.info-cards{grid-template-columns:1fr;gap:16px}.info-card{padding:20px}.article-grid{grid-template-columns:1fr}.article-card-link{gap:14px}.article-thumb{width:min(100px,28%)}.article-card h3{font-size:17px}.article-card p{font-size:14px;-webkit-line-clamp:2}.article-detail{margin:28px 0 40px}.article-summary{font-size:16px}.article-body h2{font-size:23px}.carousel-controls{justify-content:center;gap:10px}.site-footer{padding:24px 0 20px}.footer-bottom{font-size:12px}}@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important}}

.about-features{margin-top:1.5rem;padding-top:1rem;position:relative}.about-features::before{content:"";position:absolute;top:0;left:0;width:50%;border-top:1px solid var(--line,#deded9)}

/* Guide only: natural text height, three desktop columns and one mobile column. */
.home-guide-cards{grid-template-columns:repeat(3,minmax(0,1fr));align-items:stretch}.home-guide-cards>.info-card{display:flex;flex-direction:column;min-width:0;height:auto}.home-guide-cards h3,.home-guide-cards .page-prose{overflow-wrap:anywhere;white-space:normal;overflow:visible;max-height:none;-webkit-line-clamp:unset}.home-guide-cards .page-buttons{margin-top:auto;padding-top:1rem}.home-guide-cards .page-prose{flex:1}
@media(max-width:760px){.home-guide-cards{grid-template-columns:minmax(0,1fr)}}
/* Image slots retain their own shape independently of the uploaded/generated file. */
.hero-image,.block-image{aspect-ratio:4/3;overflow:hidden;border-radius:14px;min-width:0}
.hero-image img,.block-image img{width:100%;height:100%;object-fit:cover;object-position:center;display:block}
.block-cards>.block-image{aspect-ratio:16/9}
.info-card>img{width:100%;height:auto;aspect-ratio:16/9;object-fit:cover;object-position:center;flex-shrink:0}

/* Bound homepage About only: introduction and features share one text column. */
.home-about-layout.has-image{display:grid;grid-template-columns:minmax(0,3fr) minmax(0,2fr);gap:36px;align-items:center}
.home-about-copy,.home-about-image{min-width:0}
.home-about-image{aspect-ratio:4/3;overflow:hidden;border-radius:14px}
.home-about-image img{display:block;width:100%;height:100%;object-fit:contain;object-position:center}
@media(max-width:760px){.home-about-layout.has-image{grid-template-columns:minmax(0,1fr);gap:24px}.home-about-layout.has-image>.home-about-image{grid-row:1}.home-about-layout.has-image>.home-about-copy{grid-row:2}}

/* Columns retain optional blocks and the inherited shell; no formal content is filled on upgrade. */
.column-hero.has-image{grid-template-columns:minmax(0,1fr) min(var(--column-image-share),var(--column-image-max));gap:var(--column-image-gap)}
.article-grid.compact{grid-template-columns:minmax(0,1fr)}.article-grid.compact .article-card{padding:14px 0}
.article-card h3{overflow-wrap:anywhere;white-space:normal}.article-card-link>div{flex:1}
.related-articles ul{padding-left:22px;margin:0 0 24px}.related-articles li{margin:12px 0;overflow-wrap:anywhere}.column-return{display:inline-block;color:var(--blue);text-decoration:underline;text-underline-offset:3px}
@media(max-width:760px){.column-hero.has-image{grid-template-columns:minmax(0,1fr);gap:var(--column-image-mobile-gap)}}

/* Shared footer: site-owned text and live main-navigation links. */
.footer-grid{display:grid;grid-template-columns:minmax(0,1.4fr) minmax(0,1fr) minmax(0,1.2fr);gap:28px 40px}.footer-grid>div{min-width:0;overflow-wrap:anywhere}.site-footer .footer-heading{font-size:15px;font-weight:700;line-height:1.6;margin:0 0 16px;color:var(--ink)}.footer-grid .footer-links{margin:0;gap:10px 20px;align-content:start}.footer-contact .footer-links{margin-bottom:12px}.footer-grid .footer-links a{min-width:0;max-width:100%;overflow-wrap:anywhere}.footer-bottom>span{min-width:0;overflow-wrap:anywhere}@media(max-width:760px){.footer-grid{grid-template-columns:minmax(0,1fr);gap:24px}.site-footer .footer-heading{margin-bottom:12px}}

/* V4 is opt-in for existing sites. The header wrapper remains neutral for legacy pages. */
.header-navigation{display:flex;align-items:center;gap:16px;min-width:0}.navigation-toggle[hidden],.header-navigation[hidden]{display:none}.header-search{position:relative}.header-search summary{cursor:pointer;white-space:nowrap}.header-search form{display:flex;gap:8px;flex-wrap:wrap;padding:12px;border:1px solid var(--line);border-radius:8px;background:var(--paper)}.header-search[open] form{position:absolute;right:0;top:100%;z-index:5;width:min(360px,calc(100vw - 32px))}.header-search input,.search-form input{font:inherit;min-width:0;max-width:100%;padding:10px 12px;border:1px solid var(--line);border-radius:6px;flex:1}.header-search button,.search-form button,.navigation-toggle{font:inherit;border:1px solid var(--blue);color:var(--blue);background:var(--paper);padding:9px 14px;border-radius:6px;min-height:42px}.search-form{display:flex;gap:12px;max-width:680px;flex-wrap:wrap}.article-toc{margin:24px 0;padding:16px 20px;border:1px solid var(--line);border-radius:8px;background:#fafbfd}.article-toc summary{font-weight:700;cursor:pointer}.article-toc ol{padding-left:20px;margin-bottom:0}.article-toc li{margin:8px 0;overflow-wrap:anywhere}.article-toc .toc-level-3{margin-left:20px}.article-body h2[id],.article-body h3[id]{scroll-margin-top:20px}
.layout-v4 .page-hero{padding:32px 0}.layout-v4 .page-hero h1{font-size:clamp(28px,3vw,36px);line-height:1.4;margin-bottom:16px}.layout-v4 .page-intro{font-size:16px}.layout-v4 .page-hero .page-buttons{margin-top:20px}.layout-v4 .page-section{padding:32px 0}.layout-v4 .page-hero.has-image{grid-template-columns:minmax(0,1.35fr) minmax(0,.85fr);gap:40px}.layout-v4 .hero-image{aspect-ratio:16/9}.layout-v4 .hero-image img,.layout-v4 .block-image img,.layout-v4 .info-card>img,.layout-v4 .home-about-image img{object-fit:contain;background:#f3f5f8}.layout-v4 .image-fit-cover .hero-image img,.layout-v4 .image-fit-cover .block-image img,.layout-v4 .image-fit-cover .info-card>img,.layout-v4 .image-fit-cover .home-about-image img{object-fit:cover}.layout-v4 .column-hero.has-image{grid-template-columns:minmax(0,1fr) min(var(--column-image-share),var(--column-image-max));gap:var(--column-image-gap)}.layout-v4 .column-hero .hero-image{aspect-ratio:4/3}.layout-v4 .intro-hero:not(.has-image),.layout-v4 .intro-blocks{max-width:880px;margin-left:auto;margin-right:auto}.layout-v4 .intro-blocks .block-text.has-image{grid-template-columns:1fr}.layout-v4 .intro-blocks .block-image{max-width:660px}.layout-v4 .block-cards>.block-image{aspect-ratio:16/9}.layout-v4 .presentation-light .info-card{border:0;border-left:2px solid var(--line);border-radius:0;padding:8px 20px}.layout-v4 .presentation-light .info-card .page-buttons{padding-top:12px}.layout-v4 .article-thumb{aspect-ratio:16/9;background:#f3f5f8}.cover-cover .article-thumb img{object-fit:cover}.cover-cover .article-cover{object-fit:cover}.layout-v4 .article-cover{width:100%;aspect-ratio:16/9;object-fit:contain;background:#f3f5f8}.layout-v4.cover-cover .article-cover{object-fit:cover}.layout-v4 .v4-article-list.featured .article-grid{grid-template-columns:minmax(0,1.2fr) minmax(0,1fr);align-items:start;column-gap:32px}.layout-v4 .v4-article-list.featured .article-card:first-child{grid-row:span var(--article-side-count)}.layout-v4 .v4-article-list.single .article-grid{grid-template-columns:minmax(0,1fr)}.layout-v4 .v4-article-list.single .article-card:first-child{max-width:850px}.layout-v4 .v4-article-list.single .article-thumb{max-width:660px}.layout-v4 .paired-article-sections{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:32px}.layout-v4 .paired-article-sections .article-grid{grid-template-columns:minmax(0,1fr)}.layout-v4 .article-card h3{display:block;max-height:none;overflow:visible;white-space:normal;-webkit-line-clamp:unset}.layout-v4 .article-card time{font-variant-numeric:tabular-nums}.layout-v4 .section-title{flex-wrap:wrap}.layout-v4 .section-title>a{flex-shrink:1}
@media(min-width:761px) and (max-width:1024px){.layout-v4 .header-inner{flex-wrap:wrap}.layout-v4 .header-navigation{width:100%;justify-content:space-between}.layout-v4 .page-hero.has-image{gap:28px}.layout-v4 .paired-article-sections{gap:24px}.layout-v4 .paired-article-sections .article-thumb{width:100px}.layout-v4 .footer-grid{gap:24px}}
@media(max-width:760px){.header-navigation{width:100%;flex-wrap:wrap}.header-search[open] form{position:static;margin-top:8px;width:100%}.header-search{width:100%}.layout-v4 .navigation-toggle{margin-left:auto}.layout-v4 .page-hero.has-image,.layout-v4 .column-hero.has-image,.layout-v4 .paired-article-sections{grid-template-columns:minmax(0,1fr);gap:24px}.layout-v4 .column-hero .hero-image{width:min(var(--column-image-mobile-max),100%);justify-self:center}.layout-v4 .v4-article-list.featured .article-grid{grid-template-columns:minmax(0,1fr)}.layout-v4 .v4-article-list.featured .article-card:first-child{grid-row:auto}.layout-v4 .paired-article-sections{gap:0}.layout-v4 .presentation-light .info-card{padding:8px 16px}.layout-v4 .home-about-layout.has-image>.home-about-image{grid-row:auto}.layout-v4 .home-about-layout.has-image>.home-about-copy{grid-row:auto}}