/* 网络资源门户：独立布局，沿用 XBlog 公共交互。 */
:root{--bg:#f8fafc;--surface:#fff;--text:#253047;--muted:#68758a;--line:#e5eaf1;--accent:#087bea;--soft:#edf6ff;--code:#f0f4f9;--scrollbar:#c5d0df;--portal-hero:linear-gradient(135deg,#eef6ff 0%,#f7f9fc 50%,#edf1f5 100%);--portal-feature:linear-gradient(135deg,#e1f3ff,#c9ebff);--portal-yellow:linear-gradient(135deg,#fff5c7,#ffe786);--portal-yellow-text:#63500e;--portal-shadow:0 5px 22px rgb(40 71 108 / 4%);--radius:16px}
:root.dark{--bg:#101827;--surface:#192335;--text:#e6edf7;--muted:#a1aec2;--line:#2b3a50;--accent:#6bbaff;--soft:#1d3450;--code:#121d2d;--scrollbar:#40526c;--portal-hero:linear-gradient(135deg,#172e4a,#192638 58%,#1b2b40);--portal-feature:linear-gradient(135deg,#173e62,#1a4a70);--portal-yellow:linear-gradient(135deg,#443b21,#50431e);--portal-yellow-text:#ffe59a;--portal-shadow:0 5px 22px rgb(0 0 0 / 10%)}
.portal-page{font-size:15px;line-height:1.75}
.portal-page:not(.article-page){height:auto;min-height:100vh;overflow:visible}
.portal-page:not(.article-page)>.page-viewport{display:block;flex:1}
.portal-page:not(.article-page)>.page-viewport>.page-scroll{display:block;overflow:visible}
.portal-page>.site-header{background:var(--surface);max-height:none;overflow:visible;border-bottom:1px solid var(--line)}
.portal-page .header-inner{max-width:1184px;min-height:76px;padding:14px 24px;gap:16px}
.portal-page .brand{font-size:19px;gap:10px;flex-shrink:0}
.portal-page .brand img{width:36px;height:36px;border-radius:10px}
.portal-page .header-inner>nav{gap:4px;font-size:14px}
.portal-page .header-inner>nav a{padding:7px 13px;border-radius:22px;color:var(--text);white-space:nowrap}
.portal-page .header-inner>nav a:hover{background:var(--soft);color:var(--accent)}
.portal-page .header-inner>nav a[aria-current]{color:#fff;background:#087bea}
.portal-page .header-inner>nav a[aria-current]::after{display:none}
.portal-page .search-toggle,.portal-page .theme-toggle{width:36px;height:36px;background:transparent;border-color:var(--line)}
.portal-page .portal-shell{max-width:1184px;padding:30px 24px 54px}
.portal-page .home-shell{display:block}
.portal-hero{position:relative;overflow:hidden;isolation:isolate;text-align:center;padding:45px 24px 40px;background:var(--portal-hero);border:1px solid var(--line);border-radius:22px;margin-bottom:42px}
.portal-hero::before{content:"";position:absolute;width:220px;height:220px;left:-100px;top:-100px;background:var(--accent);opacity:.09;filter:blur(32px);border-radius:50%;z-index:-1;pointer-events:none}
.portal-kicker{font-size:12px;font-weight:600;color:var(--accent);letter-spacing:1.5px;margin:0 0 10px}
.portal-hero h1{font-size:clamp(34px,4.4vw,48px);line-height:1.25;letter-spacing:-1.6px;margin:0 0 13px;font-weight:800;color:var(--accent);background:linear-gradient(110deg,#087bea 30%,#00a7e8 70%);background-clip:text;-webkit-background-clip:text;-webkit-text-fill-color:transparent}
:root.dark .portal-hero h1{background-image:linear-gradient(110deg,#78bcff,#60daff)}
.portal-subtitle{margin:0 0 17px;font-size:17px;color:var(--text)}
.portal-description{max-width:640px;margin:0 auto 24px;font-size:15px;color:var(--muted);line-height:1.9}
.portal-search{max-width:510px;margin:0 auto 22px;display:flex;align-items:center;gap:12px;text-align:left;border-radius:30px}
.portal-search>span{display:flex;gap:10px;align-items:center;min-width:0;flex:1;padding:12px 20px;background:var(--surface);border:1px solid var(--line);border-radius:28px;color:var(--muted);font-size:14px}
.portal-search svg{flex-shrink:0;color:var(--accent)}
.portal-search>strong{padding:11px 25px;border-radius:28px;background:#087bea;color:#fff;font-size:14px}
.portal-search:hover>span{border-color:var(--accent)}
.portal-explore{display:inline-flex;align-items:center;gap:14px;border-radius:24px;padding:10px 24px;background:#087bea;color:#fff;font-size:14px;font-weight:600}
.portal-explore:hover{background:#0868c6;color:#fff}
.portal-section{margin:0 0 38px;scroll-margin-top:24px}
.portal-section-heading{display:flex;align-items:center;justify-content:space-between;gap:20px;margin:0 0 24px}
.portal-section-heading :is(h1,h2){position:relative;margin:0;padding-bottom:10px;font-size:25px;line-height:1.4;letter-spacing:-.5px}
.portal-section-heading :is(h1,h2)::after{position:absolute;bottom:0;left:0;content:"";height:3px;width:34px;background:var(--accent);border-radius:2px}
.portal-section-heading>span{color:var(--muted);font-size:13px}
.portal-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px}
.portal-card{display:flex;flex-direction:column;min-width:0;padding:24px;border:1px solid var(--line);border-radius:16px;background:var(--surface);box-shadow:var(--portal-shadow);transition:transform .2s,border-color .2s,box-shadow .2s;color:var(--text)}
.portal-card-featured{grid-column:span 2;background:var(--portal-feature)}
.portal-card-latest{background:var(--portal-yellow);color:var(--portal-yellow-text)}
.portal-card-icon{font-size:28px;line-height:1.2;margin-bottom:15px}
.portal-card h3{display:flex;align-items:center;justify-content:space-between;gap:10px;margin:0 0 9px;font-size:19px;line-height:1.5;color:inherit}
.portal-card h3>span{font-size:18px;color:var(--accent);transition:transform .2s}
.portal-card p{flex:1;margin:0 0 18px;font-size:13px;line-height:1.8;color:var(--muted);max-width:520px}
.portal-card-latest p,.portal-card-latest small,.portal-card-latest h3>span{color:var(--portal-yellow-text)}
.portal-card small{display:flex;justify-content:space-between;gap:8px;font-size:11px;color:var(--muted)}
.portal-card small>span{font-weight:600;color:var(--accent)}
@media(hover:hover){.portal-card:hover{transform:translateY(-3px);border-color:var(--accent);box-shadow:0 8px 25px rgb(18 98 180 / 10%);color:var(--text)}.portal-card:hover h3>span{transform:translateX(3px)}}
.portal-topic-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:14px}
.portal-topic-grid a{text-align:center;padding:17px 12px;border:1px solid var(--line);border-radius:12px;background:var(--surface)}
.portal-topic-grid a:hover{background:var(--soft);border-color:var(--accent)}
.portal-topic-grid strong,.portal-topic-grid span{display:block}
.portal-topic-grid strong{font-size:15px;font-weight:600}
.portal-topic-grid span{font-size:12px;margin-top:4px;color:var(--muted)}
.portal-discover{scroll-margin-top:24px}
.portal-page .portal-articles{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:18px;counter-reset:none}
.portal-page .article-card,.portal-page .article-card:first-child{padding:0;min-width:0;margin:0;border:1px solid var(--line);border-radius:16px;background:var(--surface);overflow:hidden;box-shadow:var(--portal-shadow);display:flex;flex-direction:column}
.portal-page .portal-articles-home .article-card:first-child{grid-row:span 2;background:var(--portal-hero)}
.portal-article-content{padding:24px;display:flex;flex-direction:column;flex:1;min-width:0}
.portal-article-label{display:flex;align-items:center;flex-wrap:wrap;gap:10px;margin-bottom:12px;font-size:11px;color:var(--muted)}
.portal-article-label a{color:var(--accent)}
.portal-page .pinned{margin:0;border:0;background:var(--soft);padding:2px 8px;border-radius:5px;color:var(--accent)}
.portal-page .article-card h2{font-size:19px;line-height:1.6;font-weight:650;letter-spacing:0;margin:0 0 11px}
.portal-page .portal-articles-home .article-card:first-child h2{font-size:27px;line-height:1.5}
.portal-page .card-summary{font-size:13px;line-height:1.85;color:var(--muted);margin:0 0 20px;flex:1;overflow-wrap:anywhere}
.portal-page .card-footer{font-size:11px;line-height:1.7;display:flex;align-items:center;justify-content:space-between;gap:12px;margin-top:auto;flex-wrap:wrap}
.portal-page .card-footer>span{display:flex;flex-wrap:wrap;gap:8px}
.portal-page .read-more{color:var(--accent);white-space:nowrap;font-size:12px}
.portal-page .article-cover{margin:0;aspect-ratio:16/9;overflow:hidden;width:100%;background:var(--soft)}
.portal-page .article-cover img{display:block;width:100%;height:100%;object-fit:cover}
.portal-page .portal-support{display:grid;grid-template-columns:minmax(0,1fr) 280px;gap:28px;margin-top:36px;align-items:start}
.portal-page .portal-support>.home-sidebar{display:grid;grid-template-columns:1fr 1fr;gap:28px;position:static;max-height:none;overflow:visible}
.portal-support .sidebar-section{margin:0;padding:22px;border:1px solid var(--line);border-radius:14px;background:var(--surface)}
.portal-support .sidebar-section h2{font-size:15px;margin:0 0 14px}
.portal-support>.ad-slot{margin:0}
.portal-page .ad-card{border-radius:14px;overflow:hidden}
.portal-page .site-banners{border-radius:16px;margin-bottom:34px}
.portal-page .archive-header{padding:12px 0 24px;border-bottom:1px solid var(--line);margin-bottom:30px}
.portal-page .archive-header h1{font-size:32px;margin:6px 0 12px}
.portal-page .archive-header p{max-width:760px;color:var(--muted)}
.portal-page .pagination{margin-top:26px}
.portal-page .article-shell{grid-template-columns:minmax(0,1fr) 236px;gap:24px 36px}
.portal-page .article-shell>article{padding:30px 34px;border:1px solid var(--line);border-radius:18px;background:var(--surface);min-width:0}
.portal-page .article-header h1{font-size:30px;line-height:1.5}
.portal-page .prose{font-size:16px;line-height:1.95}
.portal-page .prose h2{font-size:24px}
.portal-page .toc{border:1px solid var(--line);border-radius:14px;padding:20px;background:var(--surface)}
.portal-page .breadcrumbs{font-size:12px}
.portal-page>.portal-footer{width:100%;max-width:none;border-top:1px solid var(--line);background:var(--surface);margin:0;padding:34px max(24px,calc((100% - 1136px)/2));text-align:left;max-height:none;overflow:visible}
.portal-footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:30px;margin-bottom:28px}
.portal-footer-grid h2{font-size:14px;color:var(--text);margin:0 0 12px}
.portal-footer-grid a{display:block;font-size:12px;line-height:2.2;color:var(--muted)}
.portal-footer-grid a:hover{color:var(--accent)}
.portal-footer-grid .portal-footer-about>a{font-size:19px;font-weight:700;color:var(--text)}
.portal-footer-about p,.portal-footer-about>span{font-size:12px;color:var(--muted)}
.portal-footer-about p{margin:8px 0}
.portal-footer .friend-links{justify-content:flex-start;font-size:12px;margin-bottom:18px;gap:10px 20px}
.portal-footer-bottom{display:flex;justify-content:space-between;gap:10px;flex-wrap:wrap;color:var(--muted);font-size:12px;padding-top:18px;border-top:1px solid var(--line)}
.portal-page.article-page>.portal-footer{padding:12px max(24px,calc((100% - 1136px)/2));max-height:25dvh;overflow:auto}
.article-page .portal-footer .friend-links{margin:0 0 6px}
.article-page .portal-footer-bottom{border:0;padding:0}
.portal-page .button{border-radius:24px;background:#087bea;color:#fff;border-color:transparent}
.portal-page .article-tags a{overflow-wrap:anywhere}
.portal-page .portal-articles>.empty{grid-column:1/-1}
@media(max-width:1100px){.portal-page .header-inner{gap:10px}.portal-page .header-inner>nav a{padding:7px 9px;font-size:13px}.portal-page .brand{font-size:17px}.portal-page .portal-support{grid-template-columns:minmax(0,1fr) 250px}}
@media(max-width:980px){.portal-page .article-shell{display:block}.portal-page .article-rail{margin-top:24px}.portal-page .portal-support{grid-template-columns:1fr}.portal-page .portal-support>.ad-slot{max-width:480px}.portal-grid{gap:14px}.portal-card{padding:20px}.portal-page .header-inner>nav{gap:1px}.portal-page .header-inner>nav a{padding:6px;font-size:12px}}
@media(max-width:760px){.portal-page .header-inner{padding:12px 18px;min-height:66px;gap:9px}.portal-page .brand{font-size:18px;gap:8px}.portal-page .brand img{width:30px;height:30px}.portal-page .header-inner.navigation-ready>nav{left:16px;right:16px;padding:8px;background:var(--surface)}.portal-page .header-inner.navigation-ready>nav a{font-size:14px;padding:10px 12px}.portal-page .header-inner.navigation-ready>nav a[aria-current]{color:var(--accent);background:var(--soft)}.portal-page .portal-shell{padding:20px 18px 36px}.portal-hero{padding:32px 18px;border-radius:18px;margin-bottom:30px}.portal-kicker{font-size:10px;letter-spacing:1px}.portal-hero h1{font-size:35px;letter-spacing:-1px}.portal-subtitle{font-size:15px}.portal-description{font-size:13px}.portal-description br{display:none}.portal-search{gap:8px}.portal-search>span{padding:12px;font-size:12px;gap:7px}.portal-search>strong{padding:11px 17px;font-size:13px}.portal-search svg{width:16px}.portal-explore{font-size:13px}.portal-section-heading{margin-bottom:20px;gap:12px}.portal-section-heading :is(h1,h2){font-size:22px}.portal-section-heading>span{font-size:11px}.portal-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}.portal-card{padding:20px}.portal-card-featured,.portal-card-latest{grid-column:span 2}.portal-card-icon{font-size:25px;margin-bottom:12px}.portal-card h3{font-size:17px}.portal-card p{font-size:12px}.portal-card small{font-size:10px;flex-wrap:wrap}.portal-card small>span{white-space:nowrap}.portal-topic-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}.portal-topic-grid strong{font-size:14px}.portal-section{margin-bottom:30px}.portal-page .portal-articles{grid-template-columns:1fr;gap:14px}.portal-page .portal-articles-home .article-card:first-child{grid-row:auto}.portal-article-content{padding:21px}.portal-page .article-card h2,.portal-page .portal-articles-home .article-card:first-child h2{font-size:20px}.portal-page .card-summary{font-size:13px}.portal-page .portal-support{display:block;margin-top:24px}.portal-page .portal-support>.home-sidebar{display:none}.portal-page .portal-support>.ad-slot{max-width:none}.portal-page .article-shell>article{padding:24px 20px;border-radius:14px}.portal-page .article-header h1{font-size:25px}.portal-page .prose{font-size:15px}.portal-page .prose h2{font-size:22px}.portal-page>.portal-footer{padding:26px 18px}.portal-footer-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:25px 20px}.portal-footer-grid .portal-footer-about{grid-column:1/-1}.portal-footer-grid>div:last-child{display:none}.portal-page.article-page>.portal-footer{padding:10px 18px}.article-page .portal-footer .friend-links{font-size:10px;gap:4px 12px}.portal-footer-bottom{font-size:11px}.portal-page .archive-header h1{font-size:27px}}
@media(max-width:380px){.portal-grid{grid-template-columns:minmax(0,1fr)}.portal-card-featured,.portal-card-latest{grid-column:auto}.portal-section-heading>span{display:none}.portal-search>span{font-size:11px}.portal-search>strong{padding-inline:14px}.portal-hero h1{font-size:31px}}
@media(prefers-reduced-motion:reduce){.portal-card,.portal-card h3>span{transition:none}.portal-card:hover{transform:none}}