.universal-page{--q-serif:'Article Serif','Noto Serif SC','Songti SC',SimSun,serif;--ink:#102e43;--muted:#4c626f;--accent:#007580;--line:#cddadf;color:var(--ink)}
.article-hero{position:relative;isolation:isolate;overflow:hidden;background-image:none}
.article-hero>img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;object-position:50% 57%;z-index:-2}
.article-hero::before{content:'';position:absolute;inset:0;z-index:-1;background:linear-gradient(90deg,rgba(4,28,45,.96),rgba(4,28,45,.78) 35%,rgba(4,28,45,.12) 75%)}
.article-hero .hero-title{--q-title-base:clamp(54px,5.8vw,92px);font-size:calc(var(--q-title-base)*.9);line-height:calc(var(--q-title-base)*1.12);letter-spacing:-.035em;margin:0;font-family:var(--q-serif);font-weight:700}
.article-hero .hero-subtitle{font-family:var(--q-serif);font-weight:700}
.article-spread{--pad:clamp(24px,3.1vw,53px);position:relative;width:min(90.5%,1420px);margin:-126px auto 0;padding:26px var(--pad) 48px;background:white}
.article-breadcrumb{display:flex;align-items:center;gap:12px;flex-wrap:wrap;min-height:44px;margin-bottom:28px;font-size:14px;color:var(--muted)}
.article-breadcrumb a{display:inline-flex;align-items:center;min-height:44px}.article-breadcrumb a:hover{color:var(--accent);text-decoration:underline;text-underline-offset:4px}.article-breadcrumb>span{color:#6a828e}
.article-grid{display:grid;grid-template-columns:29% minmax(0,1fr);column-gap:6%;align-items:start}
.article-rail{height:100%;min-width:0}.rail-inner{position:sticky;top:28px;width:min(100%,260px);max-height:calc(100dvh - 56px);overflow:auto;scrollbar-width:thin;scrollbar-color:#809ba8 transparent}
.article-toc summary{display:flex;align-items:center;justify-content:space-between;font-size:20px;font-weight:700;list-style:none;cursor:pointer;min-height:44px;margin-bottom:12px}
.article-toc summary::-webkit-details-marker{display:none}.article-toc summary svg{width:18px;height:18px;stroke:currentColor;fill:none;stroke-width:1.5;margin-right:8px}.article-toc[open] summary svg{transform:rotate(180deg)}
.article-toc a{display:block;min-height:44px;padding:9px 0;font-size:16px;line-height:1.6;color:var(--muted)}
.article-toc .h3 a{padding-left:14px;font-size:15px}
.article-toc a:hover,.article-toc a[aria-current]{color:var(--accent);text-decoration:underline;text-underline-offset:6px;text-decoration-thickness:1px}
.article-toc a[aria-current]{font-weight:600}
.article-contact{margin-top:32px;padding-top:23px;border-top:1px solid var(--line)}
.article-contact p{font-size:15px;color:var(--muted);margin-bottom:8px}.contact-phone{font-size:22px;font-weight:600;font-variant-numeric:tabular-nums;letter-spacing:-.02em;display:block}
.contact-link{font-size:15px;display:inline-flex;align-items:center;gap:14px;min-height:44px;color:var(--accent);margin-top:7px}
.article-spread svg{width:20px;height:20px;fill:none;stroke:currentColor;stroke-width:1.5;flex:none;vertical-align:middle}
.back-top{display:inline-flex;gap:14px;align-items:center;min-height:44px;font-size:14px;margin-top:18px;color:var(--muted)}
.article-document{min-width:0;max-width:850px}.article-heading{margin:0 0 32px}
.article-heading h1{font:700 clamp(32px,3.55vw,52px)/1.35 var(--q-serif);letter-spacing:-.03em;color:var(--ink);text-wrap:balance;overflow-wrap:anywhere;margin:0}
.article-heading time{display:block;color:var(--muted);font-size:14px;margin-top:15px}
.article-content{font-family:'Article Reading','Microsoft YaHei','PingFang SC',sans-serif;font-size:17px;line-height:1.95;color:#243f50;overflow-wrap:anywhere}
.article-content h2{font:700 clamp(25px,2.25vw,33px)/1.45 var(--q-serif);letter-spacing:-.02em;margin:42px 0 15px;color:var(--ink);scroll-margin-top:28px}
.article-content h2:first-child{margin-top:0}.article-content h3{font-size:21px;font-weight:600;line-height:1.6;margin:30px 0 12px;color:var(--ink);scroll-margin-top:28px}
.article-content p{margin:0 0 18px}.article-content strong{font-weight:600}.article-content ul,.article-content ol{padding-left:1.5em;margin:18px 0;list-style:disc}.article-content ol{list-style:decimal}.article-content li{margin:8px 0}
.article-content blockquote{margin:24px 0;padding:18px 24px;background:#edf3f4;border-left:1px solid #8ba8b4}.article-content a{color:var(--accent);text-decoration:underline;text-underline-offset:4px}
.article-content pre{overflow:auto;padding:20px;background:#edf3f4;font-size:15px}.article-content sup,.article-content sub{line-height:0}
.table-scroll{width:100%;overflow-x:auto;margin:22px 0 30px;scrollbar-width:thin;scrollbar-color:#658795 #e7eff2}
.article-content .table-hint{display:none;font-size:13px;line-height:1.6;color:var(--muted);margin:12px 0 8px}
.technical-table{border-collapse:collapse;min-width:640px;width:100%;font-size:15px;line-height:1.8;font-variant-numeric:tabular-nums;table-layout:fixed}
.technical-table th,.technical-table td{padding:14px 16px;text-align:left;vertical-align:top;border-bottom:1px solid #ccdbe2;overflow-wrap:anywhere}
.technical-table th{background:#0b2e45;color:#fff;font-weight:600;border-bottom:0}.technical-table td{background:#f3f7f8}.technical-table tr:nth-child(odd) td{background:#fff}
.technical-table.three-columns th:first-child,.technical-table.three-columns td:first-child{width:17%;font-weight:600;white-space:nowrap}.technical-table.three-columns th:nth-child(2){width:34%}
.article-figure{margin:28px 0;max-width:100%}.article-figure>a{display:block}.article-figure img{max-width:100%;height:auto;margin:auto}.article-figure figcaption{font-size:13px;text-align:right;line-height:1.6;color:var(--accent);margin-top:8px}
.article-neighbors{border-top:1px solid var(--line);margin-top:42px;padding-top:23px;display:flex;justify-content:space-between;gap:30px;align-items:start}
.neighbor{max-width:48%;min-height:60px}.neighbor>span{display:block;color:var(--muted);font-size:14px;margin-bottom:9px}.neighbor strong{font-size:18px;line-height:1.6;font-weight:500;display:flex;align-items:center;gap:15px}.neighbor.next{margin-left:auto;text-align:right}.neighbor:hover strong{color:var(--accent)}
.return-category{display:inline-flex;align-items:center;gap:16px;min-height:44px;font-size:15px;color:var(--accent);margin-top:24px}
.article-spread a:focus-visible,.article-spread summary:focus-visible,.table-scroll:focus-visible{outline:2px solid var(--accent);outline-offset:3px}.article-content h2:focus,.article-content h3:focus,.article-heading h1:focus{outline:none}
.article-spread ::selection{background:#c8e7e8;color:#082c45}
@media(max-width:1100px){.article-grid{grid-template-columns:25% minmax(0,1fr);gap:5%}.contact-phone{font-size:18px}.article-toc a{font-size:15px}}
@media(max-width:960px){.article-grid{display:block}.article-rail{height:auto;margin-bottom:25px}.rail-inner{position:static;width:auto;max-height:none;overflow:visible}.article-contact,.back-top{display:none}.article-toc{border-bottom:1px solid var(--line);padding-bottom:12px}.article-toc summary{font-size:17px;margin:0}.article-toc ul{padding:8px 0}.article-content .table-hint{display:block}.table-scroll{margin-top:8px}}
@media(max-width:760px){.article-hero .hero-title{--q-title-base:49px}.article-hero .hero-subtitle{font-size:23px}.article-spread{margin-top:-116px;padding-top:16px;padding-bottom:30px}.article-grid{display:block}.article-rail{height:auto;margin-bottom:25px}.rail-inner{position:static;width:auto;max-height:none;overflow:visible}.article-contact,.back-top{display:none}.article-breadcrumb{font-size:13px;gap:8px;margin-bottom:14px}.article-toc{border-bottom:1px solid var(--line);padding-bottom:12px}.article-toc summary{font-size:17px;margin:0}.article-toc ul{padding:8px 0}.article-toc a{font-size:15px;min-height:44px}.article-heading{margin-bottom:25px}.article-heading h1{font-size:34px;line-height:1.4}.article-content{font-size:16px;line-height:1.9}.article-content h2{font-size:27px;margin-top:34px}.article-content h3{font-size:20px}.article-neighbors{gap:20px}.neighbor strong{font-size:16px}.article-hero>img{object-position:65% 50%}}
@media(max-width:430px){.article-spread{width:94%;--pad:18px}.article-heading h1{font-size:30px}.article-content h2{font-size:25px}.technical-table{min-width:600px;font-size:14px}.technical-table th,.technical-table td{padding:12px}.article-neighbors{flex-direction:column}.neighbor,.neighbor.next{max-width:100%;text-align:left;margin-left:0}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}.universal-page *{transition:none!important}}

.article-content video,.article-content audio{max-width:100%}.article-content img{max-width:100%;height:auto}.technical-table:not(.three-columns){table-layout:auto}.article-content figure p:last-child{margin-bottom:0}

/* Article imagery is selected by subject, never by article-number rotation. */
.article-hero{background-color:#0a2d42}.article-hero>img{object-position:var(--image-x,50%) var(--image-y,46%)}.article-content .ut-method-gallery{display:grid;grid-template-columns:minmax(0,1fr);gap:24px;margin:30px 0 38px}.article-content .ut-method-gallery.is-pair{grid-template-columns:repeat(2,minmax(0,1fr))}.article-content .ut-method-figure{margin:0;min-width:0}.article-content .ut-method-figure img{display:block;width:100%;height:auto;aspect-ratio:1672/941;object-fit:cover}.article-content .ut-method-figure figcaption{font:14px/1.7 "Microsoft YaHei",sans-serif;color:#526773;margin-top:10px}.article-content .ut-method-figure figcaption span{white-space:nowrap}@media(max-width:760px){.article-hero>img{object-position:var(--image-mobile-x,65%) var(--image-y,46%)}.article-content .ut-method-gallery.is-pair{grid-template-columns:minmax(0,1fr)}.article-content .ut-method-gallery{margin:24px 0;gap:20px}}