/* ═══════════════════════════════════════════════════════════════════
   邑泊司库 - 核心样式  深蓝+金色专业金融主题
   ═══════════════════════════════════════════════════════════════════ */
:root{
  --navy:#1a3a5c;--navy-dark:#0f2237;--navy-mid:#1e4976;
  --gold:#d4a017;--gold-light:#f0c040;
  --blue:#2b6cb0;--blue-light:#ebf4ff;
  --gray-50:#f8fafc;--gray-100:#f1f5f9;--gray-200:#e2e8f0;
  --gray-500:#64748b;--gray-700:#374151;--gray-900:#111827;
  --text:#1a202c;--text-muted:#6b7280;--white:#ffffff;
  --radius:8px;--radius-lg:16px;
  --shadow:0 4px 16px rgba(0,0,0,.10);--shadow-lg:0 8px 32px rgba(0,0,0,.14);
  --transition:.2s ease;
  --font-sans:'PingFang SC','Microsoft YaHei','Noto Sans SC',system-ui,sans-serif;
  --font-mono:'JetBrains Mono','Fira Code',monospace;
  --max-w:1200px;
}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:var(--font-sans);color:var(--text);background:var(--white);line-height:1.7;-webkit-font-smoothing:antialiased}
img{max-width:100%;height:auto;display:block}
a{color:var(--blue);text-decoration:none;transition:color var(--transition)}
a:hover{color:var(--navy)}
ul,ol{list-style:none}
.container{max-width:var(--max-w);margin:0 auto;padding:0 24px}
.section{padding:64px 0}
.section.bg-light{background:var(--gray-50)}
.section.bg-dark{background:var(--navy-dark);color:var(--white)}
#reading-progress{position:fixed;top:0;left:0;width:0;height:3px;background:linear-gradient(90deg,var(--gold),var(--gold-light));z-index:9999;transition:width .1s}

/* NAV */
.site-header{position:sticky;top:0;z-index:1000;background:var(--navy-dark);box-shadow:0 2px 16px rgba(0,0,0,.3)}
.navbar{padding:0}
.navbar .container{display:flex;align-items:center;gap:16px;min-height:64px}
.navbar-brand{display:flex;align-items:center;gap:8px;font-size:1.3rem;font-weight:700;color:var(--white)!important;white-space:nowrap;text-decoration:none}
.brand-icon{font-size:1.4rem}
.brand-text em{color:var(--gold);font-style:normal}
.navbar-toggler{display:none;flex-direction:column;gap:5px;background:none;border:none;cursor:pointer;padding:8px;margin-left:auto}
.navbar-toggler span{display:block;width:22px;height:2px;background:var(--white);border-radius:2px}
.navbar-collapse{display:flex;align-items:center;flex:1;gap:4px}
.navbar-nav{display:flex;list-style:none;gap:0;margin:0 auto}
.navbar-nav li{position:relative}
.navbar-nav a{display:block;padding:8px 14px;color:rgba(255,255,255,.85);font-size:.92rem;font-weight:500;border-radius:var(--radius);transition:var(--transition)}
.navbar-nav a:hover{color:var(--gold);background:rgba(255,255,255,.08)}
.has-dropdown:hover .dropdown-menu,.has-dropdown:focus-within .dropdown-menu{opacity:1;visibility:visible;transform:translateY(0)}
.dropdown-menu{position:absolute;top:calc(100% + 8px);left:0;background:var(--white);border-radius:var(--radius-lg);box-shadow:var(--shadow-lg);padding:16px;min-width:600px;opacity:0;visibility:hidden;transform:translateY(-8px);transition:all var(--transition);z-index:200}
.mega-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:4px}
.mega-grid a{display:block;padding:10px 12px;color:var(--gray-700);border-radius:var(--radius);font-size:.88rem;transition:var(--transition)}
.mega-grid a:hover{background:var(--blue-light);color:var(--navy)}
.search-form{display:flex;align-items:center;background:rgba(255,255,255,.1);border-radius:24px;border:1px solid rgba(255,255,255,.2);overflow:hidden;transition:var(--transition)}
.search-form:focus-within{background:rgba(255,255,255,.15);border-color:var(--gold)}
.search-form input{background:none;border:none;color:var(--white);padding:8px 16px;width:180px;font-size:.88rem;outline:none}
.search-form input::placeholder{color:rgba(255,255,255,.5)}
.search-form button{background:none;border:none;color:var(--gold);padding:8px 12px;cursor:pointer;font-size:.95rem}

/* BREADCRUMB */
.breadcrumb-bar{background:var(--gray-100);border-bottom:1px solid var(--gray-200);padding:8px 0}
.breadcrumb-bar ol{display:flex;flex-wrap:wrap;gap:4px;align-items:center;font-size:.83rem;color:var(--text-muted)}
.breadcrumb-bar li{display:flex;align-items:center}
.breadcrumb-bar li:not(:last-child)::after{content:"›";margin-left:4px}
.breadcrumb-bar a{color:var(--blue)}

/* HERO */
.hero{background:linear-gradient(135deg,var(--navy-dark) 0%,var(--navy-mid) 60%,#1e3a5f 100%);color:var(--white);padding:80px 0 64px}
.hero .container{display:grid;grid-template-columns:1fr auto;gap:48px;align-items:center}
.hero-content h1{font-size:clamp(2rem,5vw,3.2rem);font-weight:800;line-height:1.15;margin-bottom:16px}
.hero-content h1 .accent{color:var(--gold)}
.hero-sub{font-size:1.12rem;color:rgba(255,255,255,.8);margin-bottom:24px}
.hero-tags{display:flex;flex-wrap:wrap;gap:8px}
.hero-tags a{padding:6px 16px;border:1px solid rgba(255,255,255,.3);border-radius:20px;color:rgba(255,255,255,.9);font-size:.86rem;transition:var(--transition);text-decoration:none}
.hero-tags a:hover{background:var(--gold);border-color:var(--gold);color:var(--navy-dark)}
.hero-stats{display:flex;flex-direction:column;gap:20px;min-width:130px}
.stat{text-align:center;background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.15);border-radius:var(--radius-lg);padding:18px 22px}
.stat-num{display:block;font-size:1.9rem;font-weight:800;color:var(--gold);line-height:1}
.stat span:last-child{display:block;font-size:.8rem;color:rgba(255,255,255,.7);margin-top:4px}
.page-hero{background:linear-gradient(135deg,var(--navy) 0%,var(--navy-mid) 100%);color:var(--white);padding:48px 0;text-align:center}
.page-hero.dark{background:var(--navy-dark)}
.page-hero h1{font-size:clamp(1.6rem,4vw,2.4rem);font-weight:800;margin-bottom:12px}
.page-hero p{color:rgba(255,255,255,.8);font-size:1.02rem}
.page-hero-inner{display:flex;flex-direction:column;align-items:center;gap:8px}
.cat-icon-lg{font-size:3rem;margin-bottom:8px}
.result-count{color:rgba(255,255,255,.6);font-size:.88rem;margin-top:4px}

/* SECTIONS */
.section-title{font-size:1.65rem;font-weight:700;color:var(--navy);margin-bottom:8px}
.section-title.light{color:var(--white)}
.section-desc{color:var(--text-muted);margin-bottom:36px;font-size:1rem}
.section-desc.light{color:rgba(255,255,255,.75)}
.text-center{text-align:center}

/* CATEGORY CARDS */
.category-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(200px,1fr));gap:14px}
.category-card{display:flex;flex-direction:column;gap:8px;padding:22px;background:var(--white);border:1px solid var(--gray-200);border-radius:var(--radius-lg);transition:all var(--transition);text-decoration:none;color:inherit}
.category-card:hover{border-color:var(--navy);box-shadow:var(--shadow);transform:translateY(-2px)}
.cat-icon{font-size:1.9rem;margin-bottom:4px}
.category-card h3{font-size:1rem;font-weight:700;color:var(--gray-900)}
.category-card p{font-size:.84rem;color:var(--text-muted);line-height:1.5}

/* ARTICLE CARDS & LIST */
.article-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:18px}
.featured-grid{grid-template-columns:repeat(auto-fill,minmax(320px,1fr))}
.article-card{background:var(--white);border:1px solid var(--gray-200);border-radius:var(--radius-lg);padding:22px;display:flex;flex-direction:column;gap:10px;transition:all var(--transition)}
.article-card:hover{border-color:var(--navy);box-shadow:var(--shadow);transform:translateY(-2px)}
.article-card.featured{border-top:3px solid var(--gold)}
.card-meta{display:flex;align-items:center;gap:10px;font-size:.8rem;color:var(--text-muted)}
.article-card h3{font-size:1.02rem;font-weight:700;line-height:1.4}
.article-card h3 a{color:var(--gray-900)}
.article-card h3 a:hover{color:var(--navy)}
.card-summary{font-size:.88rem;color:var(--text-muted);line-height:1.6;flex:1}
.card-footer{display:flex;align-items:center;justify-content:space-between;font-size:.83rem;margin-top:auto;padding-top:10px;border-top:1px solid var(--gray-100)}
.pub-date{color:var(--text-muted)}
.read-more{color:var(--blue);font-weight:600}
.article-list{display:flex;flex-direction:column}
.article-list-item{padding:22px 0;border-bottom:1px solid var(--gray-200)}
.article-list-item:last-child{border-bottom:none}
.article-list-item.compact{padding:14px 0}
.item-meta{display:flex;flex-wrap:wrap;align-items:center;gap:8px;margin-bottom:8px;font-size:.8rem;color:var(--text-muted)}
.article-list-item h2,.article-list-item h3{font-size:1.08rem;font-weight:700;margin-bottom:8px}
.article-list-item h2 a,.article-list-item h3 a{color:var(--gray-900)}
.article-list-item h2 a:hover,.article-list-item h3 a:hover{color:var(--navy)}
.article-list-item p{color:var(--text-muted);font-size:.9rem;line-height:1.6;margin-bottom:8px}

/* LAYOUT SIDEBAR */
.content-sidebar-layout{display:grid;grid-template-columns:1fr 290px;gap:48px;align-items:start;padding:48px 0}
.sidebar{position:sticky;top:80px;display:flex;flex-direction:column;gap:18px}
.sidebar-widget{background:var(--white);border:1px solid var(--gray-200);border-radius:var(--radius-lg);padding:18px}
.sidebar-widget h4{font-size:.83rem;font-weight:700;color:var(--navy);text-transform:uppercase;letter-spacing:.05em;margin-bottom:10px}
.concept-list{display:flex;flex-direction:column;gap:5px}
.concept-list li{font-size:.88rem}
.concept-list a{color:var(--gray-700)}
.concept-list a:hover{color:var(--navy)}
.concept-list small{color:var(--text-muted);font-size:.76rem;margin-left:4px}
.cat-nav-list{display:flex;flex-direction:column;gap:3px}
.cat-nav-list a{display:block;padding:5px 8px;border-radius:var(--radius);color:var(--gray-700);font-size:.88rem;text-decoration:none}
.cat-nav-list a:hover{background:var(--blue-light);color:var(--navy)}

/* TAGS & BADGES */
.tag-row{display:flex;flex-wrap:wrap;gap:5px}
.tag-cloud{display:flex;flex-wrap:wrap;gap:5px}
.tag-pill{display:inline-block;padding:3px 10px;border:1px solid;border-radius:12px;font-size:.78rem;font-weight:500;transition:all var(--transition);text-decoration:none}
.tag-pill:hover{opacity:.75;transform:scale(1.03)}
.cat-badge{display:inline-block;padding:2px 10px;background:var(--blue-light);color:var(--blue);border-radius:12px;font-size:.76rem;font-weight:600;transition:var(--transition);text-decoration:none}
.cat-badge:hover{background:var(--navy);color:var(--white)}
.cat-badge.large{font-size:.88rem;padding:4px 14px}

/* PAGINATION */
.pagination{display:flex;gap:6px;justify-content:center;padding:28px 0}
.page-btn{display:inline-flex;align-items:center;justify-content:center;min-width:38px;height:38px;padding:0 10px;border:1px solid var(--gray-200);border-radius:var(--radius);color:var(--gray-700);font-size:.88rem;transition:var(--transition);text-decoration:none}
.page-btn:hover,.page-btn.active{background:var(--navy);border-color:var(--navy);color:var(--white)}

/* BUTTONS */
.btn-primary{display:inline-block;padding:12px 28px;background:var(--gold);color:var(--navy-dark);border-radius:24px;font-weight:700;font-size:1rem;transition:all var(--transition);text-decoration:none}
.btn-primary:hover{background:var(--gold-light);color:var(--navy-dark);transform:translateY(-1px)}
.btn-outline{display:inline-block;padding:8px 20px;border:2px solid var(--navy);border-radius:20px;color:var(--navy);font-weight:600;font-size:.88rem;transition:all var(--transition);text-decoration:none}
.btn-outline:hover{background:var(--navy);color:var(--white)}
.btn-outline.sm{font-size:.8rem;padding:5px 12px}

/* ARTICLE DETAIL */
.article-layout{display:grid;grid-template-columns:1fr 270px;gap:48px;padding:48px 0;align-items:start}
.article-sidebar{position:sticky;top:80px;display:flex;flex-direction:column;gap:18px}
.article-header{margin-bottom:28px}
.article-meta-top{display:flex;align-items:center;gap:10px;margin-bottom:14px;flex-wrap:wrap;font-size:.83rem;color:var(--text-muted)}
.article-header h1{font-size:clamp(1.6rem,3.5vw,2.1rem);font-weight:800;color:var(--gray-900);line-height:1.25;margin-bottom:14px}
.article-summary{font-size:1.08rem;color:var(--text-muted);line-height:1.7;border-left:4px solid var(--gold);padding-left:16px;margin-bottom:18px}
.article-byline{display:flex;flex-wrap:wrap;gap:14px;font-size:.86rem;color:var(--text-muted);margin-bottom:14px}
.prose{font-size:1rem;line-height:1.85;color:var(--text)}
.prose h2{font-size:1.35rem;font-weight:700;color:var(--navy);margin:1.8em 0 .7em;padding-bottom:.3em;border-bottom:2px solid var(--gold)}
.prose h3{font-size:1.12rem;font-weight:700;color:var(--gray-900);margin:1.4em 0 .5em}
.prose h4{font-size:1rem;font-weight:700;margin:1.1em 0 .4em}
.prose p{margin-bottom:1.1em}
.prose ul,.prose ol{padding-left:1.4em;margin-bottom:1.1em}
.prose li{margin-bottom:.35em}
.prose blockquote{border-left:4px solid var(--gold);background:var(--gray-50);padding:14px 18px;border-radius:0 var(--radius) var(--radius) 0;margin:1.4em 0;color:var(--gray-700);font-style:italic}
.prose table{width:100%;border-collapse:collapse;margin:1.4em 0;font-size:.9rem}
.prose th{background:var(--navy);color:var(--white);padding:10px 14px;text-align:left;font-weight:600}
.prose td{padding:10px 14px;border-bottom:1px solid var(--gray-200)}
.prose tr:nth-child(even) td{background:var(--gray-50)}
.prose code{background:var(--gray-100);padding:2px 6px;border-radius:4px;font-family:var(--font-mono);font-size:.86em;color:var(--navy)}
.prose pre{background:var(--gray-900);color:#e2e8f0;padding:18px;border-radius:var(--radius);overflow-x:auto;margin:1.4em 0;font-family:var(--font-mono);font-size:.88rem;line-height:1.6}
.prose pre code{background:none;padding:0;color:inherit}
.prose a{color:var(--blue);text-decoration:underline;text-underline-offset:2px}
.prose a.internal-link{color:var(--navy);border-bottom:1px dashed var(--navy);text-decoration:none}
.prose a.internal-link:hover{color:var(--gold);border-color:var(--gold)}
#toc{display:flex;flex-direction:column;gap:3px;max-height:380px;overflow-y:auto}
#toc a{display:block;font-size:.83rem;color:var(--gray-600);padding:3px 8px;border-left:2px solid transparent;transition:var(--transition);text-decoration:none}
#toc a.toc-h2{padding-left:8px;font-weight:600}
#toc a.toc-h3{padding-left:20px;font-size:.8rem}
#toc a:hover{color:var(--navy);border-left-color:var(--gold)}
.linked-concepts,.related-concepts{margin-top:36px;padding-top:28px;border-top:1px solid var(--gray-200)}
.linked-concepts h3,.related-concepts h2{font-size:1.08rem;font-weight:700;color:var(--navy);margin-bottom:14px}
.concept-chips{display:flex;flex-wrap:wrap;gap:8px}
.concept-chip{display:inline-flex;flex-direction:column;padding:7px 12px;background:var(--blue-light);border:1px solid var(--gray-200);border-radius:var(--radius);color:var(--gray-700);transition:var(--transition);text-decoration:none}
.concept-chip:hover{border-color:var(--navy);background:var(--white)}
.concept-chip strong{font-size:.88rem;color:var(--navy)}
.concept-chip small,.concept-chip span{font-size:.76rem;color:var(--text-muted)}
.article-nav{display:flex;justify-content:space-between;align-items:center;margin-top:36px;padding-top:22px;border-top:1px solid var(--gray-200);flex-wrap:wrap;gap:12px}
.share-btns{display:flex;align-items:center;gap:8px;font-size:.86rem;color:var(--text-muted)}
.share-btn{background:none;border:1px solid var(--gray-200);border-radius:var(--radius);padding:5px 10px;cursor:pointer;font-size:.82rem;color:var(--gray-700);transition:var(--transition)}
.share-btn:hover{border-color:var(--navy);color:var(--navy)}
.related-list{display:flex;flex-direction:column;gap:8px;margin-bottom:10px}
.related-list li{font-size:.86rem}
.related-list a{color:var(--gray-700);line-height:1.4;text-decoration:none}
.related-list a:hover{color:var(--navy)}
.rel-meta{display:block;font-size:.76rem;color:var(--text-muted);margin-top:2px}
.read-time,.view-count{color:var(--text-muted);font-size:.8rem}

/* KNOWLEDGE GRAPH */
.knowledge-graph-container{background:var(--gray-50);border:1px solid var(--gray-200);border-radius:var(--radius-lg);padding:16px;margin:32px 0;overflow:hidden}
#graph-canvas{min-height:400px;width:100%;position:relative}
.graph-legend{display:flex;flex-wrap:wrap;gap:12px;padding:10px 0 0;border-top:1px solid var(--gray-200);margin-top:8px;font-size:.82rem;color:var(--gray-600)}
.concept-section{margin-bottom:44px}
.concept-section-title{font-size:1.25rem;font-weight:700;color:var(--navy);margin-bottom:18px;padding-bottom:10px;border-bottom:2px solid var(--gray-200)}
.concept-section-title a{color:var(--navy);text-decoration:none}
.concept-section-title a:hover{color:var(--gold)}
.concept-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(230px,1fr));gap:12px}
.concept-card{display:flex;flex-direction:column;gap:5px;padding:16px;background:var(--white);border:1px solid var(--gray-200);border-radius:var(--radius-lg);transition:all var(--transition);color:inherit;text-decoration:none}
.concept-card:hover{border-color:var(--navy);box-shadow:var(--shadow);transform:translateY(-2px)}
.concept-card h3{font-size:.98rem;font-weight:700;color:var(--gray-900)}
.concept-card .en-name{font-size:.8rem;color:var(--blue);font-style:italic}
.concept-card .abbrev{font-size:.76rem;color:var(--text-muted)}
.concept-card p{font-size:.83rem;color:var(--text-muted);line-height:1.5}
.concept-detail-layout{display:grid;grid-template-columns:1fr 240px;gap:48px;padding:48px 0;align-items:start}
.concept-header{margin-bottom:28px}
.concept-header h1{font-size:clamp(1.7rem,4vw,2.3rem);font-weight:800;color:var(--gray-900);margin:10px 0}
.concept-en{font-size:1.02rem;color:var(--blue);margin-bottom:6px}
.concept-card-body{display:flex;flex-direction:column;gap:20px}
.def-block,.formula-block,.extended-block,.example-block,.standards-block{padding:18px;border-radius:var(--radius-lg);border:1px solid var(--gray-200)}
.def-block{background:var(--blue-light);border-color:#bee3f8}
.def-block h2{font-size:.9rem;font-weight:700;color:var(--navy);margin-bottom:8px;text-transform:uppercase;letter-spacing:.05em}
.formula-block{background:#fffbeb;border-color:#fde68a}
.formula-block h2{color:#92400e;font-size:.9rem;font-weight:700;margin-bottom:8px}
.formula{font-family:var(--font-mono);font-size:1.05rem;color:#92400e;background:var(--white);padding:10px 14px;border-radius:var(--radius);border:1px solid #fde68a}
.example-block{background:#f0fdf4;border-color:#bbf7d0}
.standards-block{background:#faf5ff;border-color:#d8b4fe}
.cat-nav-link{display:inline-block;color:var(--navy);font-weight:600;font-size:.92rem;text-decoration:none}
.cat-nav-link:hover{color:var(--gold)}
.linked-articles h2{font-size:1.15rem;font-weight:700;color:var(--navy);margin:36px 0 16px;padding-top:28px;border-top:1px solid var(--gray-200)}

/* SEARCH */
.hero-search{max-width:580px;margin:18px auto 0}
.hero-search input{width:100%;color:var(--white)}
.empty-state{text-align:center;padding:80px 24px;color:var(--text-muted);font-size:1.05rem}

/* FOOTER */
.site-footer{background:var(--navy-dark);color:rgba(255,255,255,.8);padding:56px 0 0}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:36px;margin-bottom:36px}
.site-footer h3{font-size:1.15rem;font-weight:700;color:var(--white);margin-bottom:10px}
.site-footer h4{font-size:.8rem;font-weight:700;color:rgba(255,255,255,.55);text-transform:uppercase;letter-spacing:.08em;margin-bottom:10px}
.site-footer p{font-size:.85rem;line-height:1.7;color:rgba(255,255,255,.55)}
.site-footer ul{display:flex;flex-direction:column;gap:7px}
.site-footer ul a{font-size:.85rem;color:rgba(255,255,255,.55);transition:var(--transition);text-decoration:none}
.site-footer ul a:hover{color:var(--gold)}
.footer-bottom{border-top:1px solid rgba(255,255,255,.1);padding:18px 0;text-align:center;font-size:.8rem;color:rgba(255,255,255,.35)}
.footer-bottom a{color:rgba(255,255,255,.45);margin:0 4px;text-decoration:none}
.footer-bottom a:hover{color:var(--gold)}

/* RESPONSIVE */
@media(max-width:1024px){
  .content-sidebar-layout,.article-layout{grid-template-columns:1fr 240px;gap:28px}
  .concept-detail-layout{grid-template-columns:1fr 200px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:24px}
}
@media(max-width:768px){
  .navbar-toggler{display:flex}
  .navbar-collapse{display:none;position:fixed;top:64px;left:0;right:0;background:var(--navy-dark);padding:16px;flex-direction:column;align-items:stretch;border-bottom:1px solid rgba(255,255,255,.1);gap:12px}
  .navbar-collapse.show{display:flex}
  .navbar-nav{flex-direction:column;gap:0}
  .navbar-nav a{padding:10px 14px}
  .dropdown-menu{position:static;opacity:1!important;visibility:visible!important;transform:none!important;min-width:unset;box-shadow:none;background:rgba(255,255,255,.04);margin:4px 0}
  .mega-grid{grid-template-columns:1fr 1fr}
  .mega-grid a{color:rgba(255,255,255,.8);font-size:.86rem}
  .mega-grid a:hover{background:rgba(255,255,255,.1);color:var(--gold)}
  .search-form{width:100%}
  .search-form input{width:100%}
  .hero .container{grid-template-columns:1fr;gap:28px}
  .hero-stats{flex-direction:row;justify-content:center}
  .content-sidebar-layout,.article-layout,.concept-detail-layout{grid-template-columns:1fr;padding:24px 0}
  .sidebar,.article-sidebar{position:static}
  .category-grid{grid-template-columns:repeat(2,1fr)}
  .concept-grid{grid-template-columns:repeat(2,1fr)}
  .footer-grid{grid-template-columns:1fr 1fr}
}
@media(max-width:480px){
  .container{padding:0 14px}
  .section{padding:40px 0}
  .hero{padding:44px 0 36px}
  .category-grid,.concept-grid,.footer-grid{grid-template-columns:1fr}
  .hero-stats{flex-direction:column;align-items:center}
  .mega-grid{grid-template-columns:1fr}
}
@media print{
  .site-header,.site-footer,.sidebar,.article-sidebar,.breadcrumb-bar{display:none}
  .article-layout,.concept-detail-layout{grid-template-columns:1fr}
}