/* New Deck ブログ共通スタイル（build.py が public/assets/blog.css へコピー） */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
:root{--black:#0A0F1E;--navy:#0B1628;--white:#FFFFFF;--offwhite:#F7F8FC;--gray-100:#F0F2F8;--gray-300:#D1D5DB;--gray-500:#6B7280;--gray-700:#374151;--blue:#0A72E0;--blue-light:#3A9BFF;--pink:#E0187A;--green:#06C755;--font-jp:'Noto Sans JP','Hiragino Sans','Yu Gothic',sans-serif;--font-en:'Space Grotesk',sans-serif;--r:12px;--r-lg:20px}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{font-family:var(--font-jp);background:var(--white);color:var(--black);overflow-x:hidden;line-height:1.7}
img{max-width:100%;height:auto;display:block}

/* HEADER */
#mainHeader{position:fixed;top:0;left:0;right:0;z-index:200;background:rgba(255,255,255,.94);backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);border-bottom:1px solid rgba(0,0,0,.06);transition:box-shadow .3s}
#mainHeader.scrolled{box-shadow:0 4px 24px rgba(0,0,0,.07)}
.header-inner{max-width:1280px;margin:0 auto;padding:0 40px;height:68px;display:flex;align-items:center;justify-content:space-between}
.logo{font-family:var(--font-en);font-weight:700;font-size:19px;color:var(--black);text-decoration:none;display:flex;align-items:center;gap:9px;letter-spacing:-.02em}
.logo-img{height:38px;width:auto;display:block}
.footer-logo-img{height:44px;width:auto;display:block}
.author-mark img{width:34px;height:auto}
.header-inner nav{display:flex;align-items:center;gap:4px}
.header-inner nav a{font-size:13.5px;font-weight:500;color:var(--gray-700);text-decoration:none;padding:8px 14px;border-radius:100px;transition:color .2s,background .2s}
.header-inner nav a:hover{color:var(--black);background:var(--gray-100)}
.header-inner nav a.active{color:var(--black);background:var(--gray-100);font-weight:600}
.nav-contact{background:var(--black)!important;color:#fff!important;font-weight:600!important;padding:9px 22px!important}
.nav-contact:hover{background:#1a2540!important}
.hamburger{display:none;flex-direction:column;gap:5px;cursor:pointer;padding:8px}
.hamburger span{display:block;width:22px;height:2px;background:var(--black);border-radius:2px}
.mobile-nav{display:none;position:fixed;top:68px;left:0;right:0;background:#fff;z-index:199;padding:20px 24px;box-shadow:0 8px 32px rgba(0,0,0,.08);flex-direction:column;gap:2px}
.mobile-nav.open{display:flex}
.mobile-nav a{font-size:15px;font-weight:500;color:var(--black);text-decoration:none;padding:14px 0;border-bottom:1px solid var(--gray-100)}

/* PAGE HERO（一覧） */
.page-hero{margin-top:68px;background:var(--black);padding:72px 40px 64px;position:relative;overflow:hidden}
.page-hero::before{content:'';position:absolute;inset:0;background:radial-gradient(ellipse 70% 60% at 80% 50%,rgba(10,114,224,.18) 0%,transparent 70%),radial-gradient(ellipse 50% 70% at 20% 80%,rgba(224,24,122,.12) 0%,transparent 60%)}
.page-hero-inner{max-width:1280px;margin:0 auto;position:relative;z-index:2}
.label-en-white{font-family:var(--font-en);font-size:11px;font-weight:700;letter-spacing:.2em;text-transform:uppercase;color:rgba(255,255,255,.45);margin-bottom:16px;display:block}
.page-hero h1{font-size:clamp(36px,5.5vw,72px);font-weight:900;letter-spacing:-.03em;color:#fff;line-height:1.15;margin-bottom:18px}
.page-hero p{font-size:16px;color:rgba(255,255,255,.6);max-width:560px;line-height:1.8}

/* FILTER BAR */
.filter-bar{background:var(--white);border-bottom:1px solid rgba(0,0,0,.06);position:sticky;top:68px;z-index:100}
.filter-inner{max-width:1280px;margin:0 auto;padding:0 40px;display:flex;align-items:center;gap:8px;height:56px;overflow-x:auto}
.filter-btn{flex-shrink:0;font-size:13px;font-weight:600;padding:6px 16px;border-radius:100px;border:1.5px solid var(--gray-300);background:transparent;color:var(--gray-500);white-space:nowrap;text-decoration:none;transition:all .2s}
.filter-btn:hover,.filter-btn.active{border-color:var(--black);background:var(--black);color:#fff}
.filter-btn.cat-tele:hover,.filter-btn.cat-tele.active{background:var(--blue);border-color:var(--blue)}
.filter-btn.cat-inf:hover,.filter-btn.cat-inf.active{background:var(--pink);border-color:var(--pink)}

/* 一覧 */
.blog-content{max-width:1280px;margin:0 auto;padding:56px 40px 96px}
.featured-post{display:grid;grid-template-columns:1.3fr 1fr;border-radius:var(--r-lg);overflow:hidden;border:1px solid rgba(0,0,0,.07);margin-bottom:56px;transition:box-shadow .3s;text-decoration:none;color:inherit}
.featured-post:hover{box-shadow:0 20px 60px rgba(0,0,0,.1)}
.featured-img-wrap{position:relative;overflow:hidden;background:#0A0F1E;display:flex;align-items:center}
.featured-img{width:100%;height:auto;aspect-ratio:1200/630;object-fit:cover;transition:transform .5s}
.featured-post:hover .featured-img{transform:scale(1.03)}
.featured-label{position:absolute;top:18px;right:18px;background:var(--pink);color:#fff;font-size:11px;font-weight:700;letter-spacing:.1em;padding:5px 14px;border-radius:100px}
.featured-body{background:var(--white);padding:48px 44px;display:flex;flex-direction:column;justify-content:center}
.featured-cat{font-size:11px;font-weight:700;letter-spacing:.1em;color:var(--pink);margin-bottom:14px}
.featured-title{font-size:clamp(21px,2.4vw,28px);font-weight:700;letter-spacing:-.02em;line-height:1.45;margin-bottom:16px}
.featured-excerpt{font-size:14.5px;color:var(--gray-700);line-height:1.85;margin-bottom:28px}
.post-meta{display:flex;align-items:center;gap:14px;font-size:12.5px;color:var(--gray-500)}
.post-meta-dot{width:3px;height:3px;border-radius:50%;background:var(--gray-300)}
.read-more{display:inline-flex;align-items:center;gap:6px;font-size:13.5px;font-weight:700;color:var(--blue);margin-top:22px}
.posts-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:28px}
.post-card{display:flex;flex-direction:column;border-radius:var(--r-lg);overflow:hidden;border:1px solid rgba(0,0,0,.07);text-decoration:none;color:inherit;transition:transform .3s,box-shadow .3s;background:#fff}
.post-card:hover{transform:translateY(-5px);box-shadow:0 16px 48px rgba(0,0,0,.1)}
.post-img-wrap{position:relative;overflow:hidden;aspect-ratio:1200/630;background:var(--navy)}
.post-img{width:100%;height:100%;object-fit:cover;transition:transform .5s}
.post-card:hover .post-img{transform:scale(1.05)}
.post-cat-badge{position:absolute;bottom:12px;left:12px;font-size:10.5px;font-weight:700;letter-spacing:.08em;padding:4px 12px;border-radius:100px;color:#fff}
.badge-tele{background:var(--blue)}.badge-inf{background:var(--pink)}.badge-sales{background:var(--black)}.badge-col{background:var(--gray-700)}
.post-body{padding:24px 24px 26px;flex:1;display:flex;flex-direction:column}
.post-date{font-size:12px;color:var(--gray-500);margin-bottom:8px}
.post-title{font-size:16.5px;font-weight:700;line-height:1.55;letter-spacing:-.01em;margin-bottom:10px}
.post-excerpt{font-size:13.5px;color:var(--gray-500);line-height:1.8;margin-bottom:18px;flex:1;display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden}
.post-footer{display:flex;align-items:center;justify-content:space-between;border-top:1px solid var(--gray-100);padding-top:14px;font-size:12.5px;color:var(--gray-500)}
.post-read-link{font-weight:700;color:var(--blue)}
.blog-layout{display:grid;grid-template-columns:1fr 300px;gap:48px;align-items:start}
.blog-layout .posts-grid{grid-template-columns:repeat(2,1fr)}
.sidebar{position:sticky;top:140px}
.sidebar-block{background:var(--offwhite);border-radius:var(--r-lg);padding:26px;margin-bottom:20px}
.sidebar-h{font-size:13px;font-weight:700;letter-spacing:.08em;color:var(--gray-500);margin-bottom:16px}
.sidebar-cat{display:flex;align-items:center;justify-content:space-between;padding:9px 0;border-bottom:1px solid rgba(0,0,0,.06);text-decoration:none;color:var(--gray-700);font-size:14px;font-weight:500}
.sidebar-cat:last-child{border-bottom:none}
.sidebar-cat:hover{color:var(--blue)}
.sidebar-cat-count{font-size:12px;font-weight:600;background:var(--gray-100);padding:2px 8px;border-radius:100px;color:var(--gray-500)}
.sidebar-recent{display:flex;flex-direction:column;gap:14px}
.sidebar-post{display:flex;gap:12px;text-decoration:none;color:inherit}
.sidebar-post:hover{opacity:.75}
.sidebar-post-img{width:56px;height:56px;border-radius:8px;object-fit:cover;flex-shrink:0}
.sidebar-post-title{font-size:13px;font-weight:600;line-height:1.5}
.sidebar-post-date{font-size:11.5px;color:var(--gray-500);margin-top:4px}
.pagination{display:flex;gap:8px;justify-content:center;margin-top:44px;flex-wrap:wrap}
.pagination a,.pagination span{min-width:42px;height:42px;padding:0 14px;display:inline-flex;align-items:center;justify-content:center;border-radius:100px;border:1.5px solid var(--gray-300);font-size:14px;font-weight:600;color:var(--gray-700);text-decoration:none}
.pagination a:hover{border-color:var(--black)}
.pagination .current{background:var(--black);border-color:var(--black);color:#fff}
.empty{padding:64px 0;text-align:center;color:var(--gray-500);grid-column:1/-1}

/* CTA */
.cta-banner{background:var(--black);border-radius:var(--r-lg);padding:40px;margin-top:56px;display:flex;align-items:center;justify-content:space-between;gap:28px;flex-wrap:wrap}
.cta-title{font-size:22px;font-weight:700;color:#fff;line-height:1.45}
.cta-banner p{font-size:14px;color:rgba(255,255,255,.6);margin-top:8px;line-height:1.8;max-width:520px}
.cta-actions{display:flex;gap:12px;flex-wrap:wrap}
.btn-white,.btn-line{display:inline-flex;align-items:center;justify-content:center;gap:8px;font-size:14px;font-weight:700;padding:14px 26px;border-radius:100px;text-decoration:none;transition:opacity .2s,transform .2s;white-space:nowrap}
.btn-white{background:#fff;color:var(--black)}
.btn-line{background:var(--green);color:#fff}
.btn-white:hover,.btn-line:hover{opacity:.88;transform:translateY(-2px)}

/* 記事ページ */
.article-wrap{max-width:1280px;margin:0 auto;padding:100px 40px 96px}
.breadcrumb{max-width:780px;margin:0 auto 26px;font-size:12.5px;color:var(--gray-500);display:flex;flex-wrap:wrap;gap:8px;align-items:center}
.breadcrumb a{color:var(--gray-500);text-decoration:none}
.breadcrumb a:hover{color:var(--blue)}
.article{max-width:780px;margin:0 auto}
.cat-link{display:inline-block;font-size:11px;font-weight:700;letter-spacing:.08em;color:#fff;padding:4px 12px;border-radius:100px;text-decoration:none}
.article-header h1{font-size:clamp(25px,3.4vw,36px);font-weight:900;line-height:1.5;letter-spacing:-.02em;margin:14px 0 16px}
.article-meta{display:flex;flex-wrap:wrap;gap:6px 18px;font-size:13px;color:var(--gray-500)}
.article-eyecatch{margin:28px 0 36px;border-radius:var(--r-lg);overflow:hidden;background:var(--navy);aspect-ratio:1200/630}
.summary-box{background:var(--offwhite);border-left:4px solid var(--blue);border-radius:var(--r);padding:22px 26px;margin-bottom:28px}
.summary-label,.toc-label{font-size:13px;font-weight:700;letter-spacing:.08em;color:var(--gray-700);margin-bottom:10px}
.summary-box ul{padding-left:1.25em}
.summary-box li{margin:6px 0;font-size:15px;line-height:1.85}
.toc{border:1px solid var(--gray-300);border-radius:var(--r);padding:20px 26px;margin-bottom:48px}
.toc ol{padding-left:1.5em}
.toc li{margin:5px 0;font-size:14.5px;line-height:1.7}
.toc a{color:var(--gray-700);text-decoration:none}
.toc a:hover{color:var(--blue);text-decoration:underline}
.prose{font-size:16px;line-height:2;color:#1f2937}
.prose h2,.faq h2{font-size:clamp(20px,2.5vw,25px);font-weight:800;line-height:1.55;color:var(--black);margin:64px 0 20px;padding-bottom:12px;border-bottom:2px solid var(--black);scroll-margin-top:90px}
.prose h2:first-child{margin-top:0}
.prose h3{font-size:18.5px;font-weight:700;line-height:1.6;color:var(--black);margin:40px 0 14px;padding-left:14px;border-left:4px solid var(--blue)}
.prose p{margin:0 0 22px}
.prose ul,.prose ol{margin:0 0 24px;padding-left:1.5em}
.prose li{margin:6px 0}
.prose strong{font-weight:700;background:linear-gradient(transparent 62%,rgba(58,155,255,.22) 62%)}
.prose a{color:var(--blue);text-decoration:underline;text-underline-offset:3px}
.prose blockquote{margin:0 0 24px;padding:16px 22px;background:var(--offwhite);border-radius:var(--r);color:var(--gray-700);font-size:15px}
.point-box{background:#EEF6FF;border-radius:var(--r);padding:20px 24px;margin:0 0 26px}
.point-box p{margin:0 0 8px}
.point-box p:last-child{margin-bottom:0}
.table-wrap{overflow-x:auto;margin:0 0 28px;border:1px solid var(--gray-100);border-radius:var(--r)}
.prose table{width:100%;border-collapse:collapse;font-size:14.5px;line-height:1.75;min-width:540px}
.prose th{background:var(--black);color:#fff;font-weight:700;text-align:left;padding:12px 14px;white-space:nowrap}
.prose td{padding:12px 14px;border-top:1px solid var(--gray-100);vertical-align:top}
.prose tr:nth-child(even) td{background:var(--offwhite)}
.faq{margin-top:64px;scroll-margin-top:90px}
.faq-item{border:1px solid var(--gray-300);border-radius:var(--r);margin-bottom:12px;overflow:hidden}
.faq-item summary{cursor:pointer;list-style:none;padding:17px 48px 17px 20px;font-weight:700;font-size:15.5px;line-height:1.65;position:relative}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::before{content:'Q.';color:var(--blue);font-family:var(--font-en);margin-right:8px}
.faq-item summary::after{content:'+';position:absolute;right:20px;top:50%;transform:translateY(-50%);font-size:20px;color:var(--gray-500)}
.faq-item[open] summary::after{content:'−'}
.faq-a{padding:0 20px 18px;font-size:15px;line-height:1.95;color:var(--gray-700)}
.author-box{display:flex;gap:18px;align-items:flex-start;background:var(--offwhite);border-radius:var(--r-lg);padding:24px;margin-top:56px}
.author-mark{width:52px;height:52px;border-radius:12px;background:var(--black);color:#fff;display:flex;align-items:center;justify-content:center;font-family:var(--font-en);font-weight:700;flex-shrink:0}
.author-name{font-weight:700;margin-bottom:4px}
.author-bio{font-size:13.5px;color:var(--gray-700);line-height:1.85}
.article-wrap>.cta-banner{max-width:780px;margin:56px auto 0}
.related{max-width:1280px;margin:80px auto 0}
.related>h2{font-size:24px;font-weight:800;margin-bottom:26px}

/* FOOTER */
footer{background:var(--black);padding:64px 40px 36px}
.footer-inner{max-width:1280px;margin:0 auto}
.footer-top{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:48px;padding-bottom:48px;border-bottom:1px solid rgba(255,255,255,.07);margin-bottom:32px}
.footer-logo{font-family:var(--font-en);font-size:19px;font-weight:700;color:#fff;text-decoration:none;display:flex;align-items:center;gap:9px;margin-bottom:14px}
.footer-logo-mark{width:32px;height:32px;border-radius:7px;background:#fff;display:flex;align-items:center;justify-content:center;color:var(--black);font-size:11px;font-weight:700}
.footer-tagline{font-size:13px;color:rgba(255,255,255,.4);line-height:1.8;margin-bottom:16px}
.footer-address{font-size:12px;color:rgba(255,255,255,.28);line-height:2}
.footer-col h5{font-size:11px;font-weight:700;letter-spacing:.12em;text-transform:uppercase;color:rgba(255,255,255,.28);margin-bottom:16px}
.footer-col a{display:block;font-size:13.5px;color:rgba(255,255,255,.5);text-decoration:none;margin-bottom:10px}
.footer-col a:hover{color:#fff}
.footer-bottom{display:flex;justify-content:space-between;font-size:12px;color:rgba(255,255,255,.28);flex-wrap:wrap;gap:12px}

/* RESPONSIVE */
@media (max-width:1024px){
  .blog-layout{grid-template-columns:1fr}
  .sidebar{position:static}
  .posts-grid,.blog-layout .posts-grid{grid-template-columns:1fr 1fr}
  .footer-top{grid-template-columns:1fr 1fr}
}
@media (max-width:768px){
  .header-inner{padding:0 20px}
  .header-inner nav{display:none}
  .hamburger{display:flex}
  .page-hero{padding:52px 20px 48px}
  .blog-content{padding:40px 20px 72px}
  .filter-inner{padding:0 20px}
  .featured-post{grid-template-columns:1fr}
  .featured-img{min-height:0;aspect-ratio:1200/630}
  .featured-body{padding:28px 24px}
  .posts-grid,.blog-layout .posts-grid{grid-template-columns:1fr}
  .article-wrap{padding:88px 20px 72px}
  .prose{font-size:15.5px;line-height:1.95}
  .summary-box,.toc{padding:18px 20px}
  .cta-banner{flex-direction:column;align-items:stretch;padding:32px 24px}
  .cta-actions{flex-direction:column}
  .footer-top{grid-template-columns:1fr;gap:28px}
  .footer-bottom{flex-direction:column}
}
/* 本文の図解（visuals.py が自動生成） */
.nd-figure{margin:22px 0 30px}
.nd-figure img{display:block;width:100%;height:auto;border-radius:14px}