/* =========================================================
   shefutech Blog Article CSS
   - header / article / embeds / blogmenu を統合
   - 記事ページ専用（ヘッダーは現行 index 風を維持）
   - /blog/articles.css として利用想定
   ========================================================= */

/* =========================
   Design Tokens
   ========================= */
:root{
  --bg:#ffffff;
  --bg-soft:#f6f8fb;
  --bg-soft-2:#f9fbff;
  --card:#ffffff;
  --card-soft:#fbfcfe;

  --text:#111827;
  --text-2:#1f2937;
  --muted:#5b6472;
  --muted-2:#6b7280;

  --stroke:#e7ebf2;
  --stroke-2:#d9e1ec;
  --stroke-strong:#c7d3e3;

  --navy:#0b3d91;
  --navy-2:#083275;
  --navy-3:#0f4daf;

  --green:#00c300;
  --green-2:#00a800;
  --line:#06c755;

  --danger:#b42318;
  --danger-bg:#fff6f5;

  --shadow-xs:0 2px 6px rgba(17,24,39,.04);
  --shadow-sm:0 10px 24px rgba(17,24,39,.05);
  --shadow-md:0 16px 38px rgba(17,24,39,.08);

  --radius-sm:10px;
  --radius-md:16px;
  --radius-lg:22px;
  --radius-pill:999px;

  --container-max:1180px;
  --article-max:790px;
  --wide-max:940px;
  --sidebar-w:320px;

  --space-1:.4rem;
  --space-2:.75rem;
  --space-3:1rem;
  --space-4:1.35rem;
  --space-5:1.8rem;
  --space-6:2.4rem;
  --space-7:3.2rem;
  --space-8:4.5rem;

  --body-size:clamp(16px, 1.03vw, 18px);
  --body-line:1.95;
  --heading-line:1.35;
  --header-offset:24px;

  --menu-side-pad: clamp(12px, 2.2vw, 22px);
}

/* =========================
   Base
   ========================= */
*,
*::before,
*::after{
  box-sizing:border-box;
}

html{
  scroll-behavior:smooth;
}

body{
  margin:0;
  color:var(--text);
  font-family:'Noto Sans JP','Outfit',system-ui,-apple-system,"Meiryo","メイリオ",sans-serif;
  font-size:var(--body-size);
  line-height:var(--body-line);
  background:
    radial-gradient(1100px 520px at 12% -8%, rgba(11,61,145,.10), transparent 60%),
    radial-gradient(900px 500px at 95% 2%, rgba(0,195,0,.07), transparent 55%),
    linear-gradient(180deg, #ffffff 0%, #f6f8fb 100%);
  overflow-x:hidden;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}

img{
  display:block;
  max-width:100%;
  height:auto;
}

a{
  color:var(--navy);
  text-decoration:none;
  text-underline-offset:.18em;
  transition:color .18s ease, opacity .18s ease, transform .18s ease;
}

a:hover{
  color:var(--navy-2);
}

p,
li,
dd,
dt,
blockquote{
  overflow-wrap:anywhere;
  word-break:break-word;
}

mark{
  background:rgba(11,61,145,.12);
  color:inherit;
  padding:0 .16em;
  border-radius:.22em;
}

strong{
  color:var(--text);
}

.background{
  opacity:.34;
  filter:brightness(1.2) contrast(1.03) saturate(1.03);
  pointer-events:none;
}

/* =========================
   Shared Utilities
   ========================= */
.card-lite{
  background:var(--card);
  border:1px solid var(--stroke);
  border-radius:var(--radius-lg);
  box-shadow:var(--shadow-sm);
}

.section-kicker{
  margin:0 0 .45rem;
  color:var(--navy);
  font-size:.86rem;
  font-weight:800;
  letter-spacing:.08em;
  text-transform:uppercase;
}

.section-head{
  display:flex;
  flex-direction:column;
  gap:.4rem;
  margin-bottom:var(--space-5);
}

.section-head h2{
  margin:0;
  font-size:clamp(1.55rem, 2vw, 2rem);
  line-height:1.25;
  letter-spacing:-.01em;
}

.section-copy{
  margin:0;
  color:var(--muted);
  font-size:.98rem;
  line-height:1.8;
}

.sr-only{
  position:absolute !important;
  width:1px !important;
  height:1px !important;
  padding:0 !important;
  margin:-1px !important;
  overflow:hidden !important;
  clip:rect(0,0,0,0) !important;
  white-space:nowrap !important;
  border:0 !important;
}

.hidden{
  display:none !important;
}

/* =========================================================
   HEADER (index と同等の見た目を維持)
   ========================================================= */
.indexheader,
header.indexheader{
  width:100% !important;
  max-width:none !important;
  margin:0 !important;
  padding:0 !important;
  position:relative;
  left:0;
  box-sizing:border-box;
}

.indexheader .title{
  width:100% !important;
  margin:0 !important;
  padding:12px var(--menu-side-pad) 0 var(--menu-side-pad) !important;
  box-sizing:border-box;
  display:flex !important;
  justify-content:flex-start !important;
  align-items:flex-start !important;
}

.indexheader .title img,
.indexheader .site-logo{
  width:min(460px, 40vw);
  height:auto;
  display:block;
  margin:0 !important;
}

.indexheader .menuunderline{
  display:none !important;
}

.indexheader nav.menu{
  width:100% !important;
  margin:0 !important;
  height:60px;
  box-sizing:border-box;
  position:relative !important;
  padding:2px 0 0 !important;
  border:0 !important;
  box-shadow:none !important;
  background:transparent !important;
}

.indexheader nav.menu::before{
  content:none !important;
}

.indexheader nav.menu::after{
  content:"";
  position:absolute;
  left:0;
  right:0;
  bottom:0;
  height:2px;
  background:rgba(17,24,39,.14);
  pointer-events:none;
  z-index:1;
}

.indexheader .menulist{
  width:60%;
  max-width:840px !important;
  margin:0 auto !important;
  height:100%;
  padding:0 var(--menu-side-pad) !important;
  list-style:none !important;
  display:flex !important;
  gap:0 !important;
  justify-content:space-between !important;
  align-items:stretch !important;
  position:relative;
  z-index:2;
}

.indexheader .menulist > li{
  flex:1 1 0 !important;
  display:flex !important;
  height:100% !important;
  justify-content:center !important;
  align-items:flex-end !important;
  text-align:center !important;
  margin:0 !important;
  padding:0 !important;
  position:relative !important;
  border:0 !important;
  box-shadow:none !important;
  list-style:none !important;
}

.indexheader .menulist > li a,
.indexheader .menulist > li span{
  display:flex !important;
  width:100%;
  justify-content:center;
  align-items:flex-end;
  padding:0 .5rem 0 !important;
  line-height:1 !important;
  font-weight:800;
  font-size:1.5em;
  font-family:Arial Black, Arial, sans-serif, 'Outfit';
  color:#111827 !important;
  position:relative;
  top:-4px;
  text-decoration:none !important;
  border:0 !important;
  box-shadow:none !important;
  background:transparent !important;
  z-index:3;
  letter-spacing: -0.025em;
}

.indexheader .menulist > li a:hover{
  color:#111827 !important;
}

.indexheader .menulist > li a::before,
.indexheader .menulist > li a::after,
.indexheader .menulist > li span::before,
.indexheader .menulist > li span::after,
.indexheader .menulist > li::after{
  content:none !important;
}

.indexheader nav.menu .menu-inkbar{
  position:absolute;
  bottom:0;
  height:2px;
  background:rgba(17,24,39,1);
  border-radius:999px;
  left:0;
  width:0;
  pointer-events:none;
  z-index:4;
  transform:translateX(0);
  transition:transform .18s ease, width .18s ease, opacity .12s ease;
  opacity:0;
}

@media (max-width:768px){
  .indexheader .menulist{
    width:80% !important;
  }
  .indexheader .menulist > li a,
  .indexheader .menulist > li span{
    font-size:1.05rem;
  }
}

/* =========================
   Layout
   ========================= */
.blogcontainer{
  width:min(100%, var(--container-max));
  margin:0 auto;
  padding:0 clamp(14px, 2.4vw, 28px);
}

.article-page{
  display:block;
  padding-top:clamp(18px, 2vw, 28px);
  padding-bottom:calc(var(--space-8) + max(3.5rem, env(safe-area-inset-bottom)));
}

.article-layout{
  width:100%;
  min-width:0;
  margin:0 auto;
}

.blogcontent{
  color:var(--text-2);
}

.article-header{
  width:min(100%, var(--article-max));
  margin:0 auto var(--space-6);
}

.article-body{
  width:min(100%, var(--article-max));
  margin:0 auto;
}

.article-body > section,
.article-body > .key-point-box,
.article-body > .flow-box,
.article-body > .checklist-box{
  margin:var(--space-7) 0;
}

.article-body > p{
  margin:0 0 1.08em;
}

.article-body > p + p{
  margin-top:0;
}

@media (min-width:1100px){
  .article-page{
    display:block;
  }

  .article-blog-logo{
    width:100%;
    justify-content:center;
    margin:0 auto .5rem;
  }

  .article-blog-logo img{
    width:min(100%, 420px);
  }

  .article-main-grid{
    display:block;
  }

  .article-main-grid > nav.blogmenu{
    grid-column:1;
    position:sticky;
    top:24px;
    align-self:start;
  }

  .article-main-grid > article.blogcontent{
    grid-column:2;
    min-width:0;
    width:100%;
    max-width:none;
    margin:0;
  }

  .article-layout{
    width:100%;
    max-width:none;
    margin:0;
    min-width:0;
  }

  .article-header,
  .article-body,
  .popup-wrap,
  .related,
  .ctaafterblog,
  .article-social-lead{
    width:min(100%, var(--article-max));
    max-width:var(--article-max);
    margin-left:0;
    margin-right:auto;
  }
}

/* =========================
   Article blog logo
   ========================= */
.article-blog-logo{
  width: 100%;
  display: flex;
  justify-content: center;
  align-items: center;
  margin: 1rem auto 1rem;
}

.article-blog-logo img{
  display: block;
  width: min(100%, 360px);
  height: auto;
  margin: 0 auto;
}

.article-main-grid{
  display: grid;
  grid-template-columns: minmax(260px, 320px) minmax(0, 1fr);
  gap: var(--space-6);
  align-items: start;
}

@media (min-width: 1100px){
  .article-blog-logo img{
    width:min(100%, 440px);
  }
}

@media (max-width: 560px){
  .article-blog-logo{
    margin:0 0 .45rem;
  }

  .article-blog-logo img{
    width:min(100%, 300px);
  }
  .article-main-grid{
    grid-template-columns: 1fr;
  }
}

@media (max-width:1099px){
  .article-main-grid{
    display:block;
  }

  .article-main-grid > article.blogcontent{
    width:100%;
    max-width:none;
    min-width:0;
  }

  .article-layout{
    width:100%;
    max-width:none;
    margin:0;
  }
}
/* =========================
   Article Hero
   ========================= */
.article-meta-top{
  display:flex;
  flex-wrap:wrap;
  gap:.7rem;
  align-items:center;
  margin-bottom:var(--space-3);
}

.article-category{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  min-height:32px;
  padding:.38rem .82rem;
  border-radius:var(--radius-pill);
  border:1px solid rgba(11,61,145,.14);
  background:rgba(11,61,145,.06);
  color:var(--navy);
  font-size:.84rem;
  font-weight:800;
  letter-spacing:.02em;
}

.article-meta-top time{
  color:var(--muted);
  font-size:.92rem;
  font-weight:600;
}

.blogtitle{
  margin:0;
  color:var(--text);
  font-size:clamp(2rem, 3.5vw, 3rem);
  line-height:1.18;
  letter-spacing:-.02em;
}

.article-intro{
  margin:var(--space-4) 0 0;
  color:var(--text-2);
  font-size:1.04em;
  line-height:1.95;
}

.article-summary{
  margin-top:var(--space-5);
  padding:1.15rem 1.2rem 1.2rem;
  background:
    linear-gradient(180deg, rgba(11,61,145,.035), rgba(11,61,145,.015)),
    var(--card);
}

.article-summary p{
  margin:0 0 .55rem;
}

.article-summary ul{
  margin:.35rem 0 0;
  padding-left:1.2rem;
}

.article-summary li{
  margin:.35rem 0;
  color:var(--text-2);
}

/* =========================
   JS-generated TOC
   ========================= */
.toc-modern{
  width:min(100%, var(--article-max));
  margin:var(--space-5) auto var(--space-7);
  padding:0;
}

.toc-modern .toc-nav{
  background:var(--card);
  border:1px solid var(--stroke);
  border-radius:var(--radius-lg);
  box-shadow:var(--shadow-sm);
  overflow:hidden;
}

.toc-modern .toc-header{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:1rem;
  padding:1rem 1.15rem;
  background:linear-gradient(180deg, rgba(11,61,145,.04), rgba(11,61,145,.01));
  border-bottom:1px solid var(--stroke);
}

.toc-modern .toc-title{
  color:var(--text);
  font-size:1rem;
  font-weight:800;
  letter-spacing:.02em;
}

.toc-modern .toc-toggle{
  appearance:none;
  border:1px solid var(--stroke-2);
  background:#fff;
  color:var(--muted);
  border-radius:999px;
  font-size:.84rem;
  font-weight:700;
  padding:.4rem .75rem;
  cursor:pointer;
  transition:border-color .18s ease, color .18s ease, background .18s ease;
}

.toc-modern .toc-toggle:hover{
  color:var(--navy);
  border-color:rgba(11,61,145,.22);
  background:rgba(11,61,145,.03);
}

.toc-modern .toc-list{
  list-style:none;
  margin:0;
  padding:.55rem .8rem .8rem;
}

.toc-modern .toc-item{
  margin:0;
}

.toc-modern .toc-item[data-level="3"]{
  padding-left:1rem;
}

.toc-modern .toc-item[data-level="4"]{
  padding-left:1.7rem;
}

.toc-modern .toc-link{
  display:block;
  padding:.62rem .65rem;
  border-radius:12px;
  color:var(--text-2);
  font-size:.95rem;
  line-height:1.55;
}

.toc-modern .toc-link:hover{
  color:var(--navy);
  background:rgba(11,61,145,.045);
}

.toc-modern.toc-collapsed .toc-list{
  display:none;
}

/* =========================
   Body Typography
   ========================= */
.article-body h2,
.article-body h3,
.article-body h4{
  color:var(--text);
  letter-spacing:-.01em;
  line-height:var(--heading-line);
  scroll-margin-top:calc(var(--header-offset) + 40px);
}

.article-body h2{
  margin:0 0 1rem;
  font-size:clamp(1.45rem, 2.2vw, 2rem);
  position:relative;
  padding-bottom:.6rem;
}

.article-body h2::after{
  content:"";
  position:absolute;
  left:0;
  bottom:0;
  width:64px;
  height:3px;
  border-radius:999px;
  background:linear-gradient(90deg, rgba(11,61,145,.95), rgba(11,61,145,.18));
}

.article-body h3{
  margin:2.1rem 0 .8rem;
  font-size:clamp(1.15rem, 1.6vw, 1.35rem);
}

.article-body h4{
  margin:1.7rem 0 .65rem;
  font-size:1.02rem;
}

.article-body p{
  margin:0 0 1.08em;
}

.article-body ul,
.article-body ol{
  margin:.55rem 0 1.2rem;
  padding-left:1.25rem;
}

.article-body li{
  margin:.45rem 0;
}

.article-body blockquote{
  margin:1.6rem 0;
  padding:1rem 1rem 1rem 1.1rem;
  border-left:4px solid rgba(11,61,145,.28);
  background:rgba(11,61,145,.045);
  color:var(--text-2);
  border-radius:0 14px 14px 0;
}

.article-body hr{
  border:0;
  border-top:1px solid var(--stroke);
  margin:var(--space-6) 0;
}

.article-body table{
  width:100%;
  border-collapse:collapse;
  margin:1.2rem 0 1.6rem;
  font-size:.95rem;
  background:#fff;
  border:1px solid var(--stroke);
  border-radius:16px;
  overflow:hidden;
  box-shadow:var(--shadow-xs);
}

.article-body th,
.article-body td{
  padding:.85rem .9rem;
  border-bottom:1px solid var(--stroke);
  vertical-align:top;
}

.article-body th{
  background:rgba(11,61,145,.05);
  color:var(--text);
  text-align:left;
  font-weight:800;
}

.article-body tr:last-child td{
  border-bottom:0;
}

/* =========================
   Callouts / Cards
   ========================= */
.key-point-box,
.flow-box,
.checklist-box{
  padding:1.15rem 1.15rem 1.2rem;
  background:
    linear-gradient(180deg, rgba(11,61,145,.03), rgba(11,61,145,.01)),
    var(--card);
}

.key-point-box p:last-child,
.flow-box p:last-child,
.checklist-box p:last-child{
  margin-bottom:0;
}

.key-point-box strong:first-child,
.flow-box strong:first-child,
.checklist-box strong:first-child{
  color:var(--navy);
}

.flow-box ol,
.checklist-box ol{
  margin:.6rem 0 1rem;
  padding-left:1.15rem;
}

.flow-box li,
.checklist-box li{
  padding-left:.15rem;
}

.checklist-box{
  border-color:rgba(11,61,145,.11);
}

.checklist-box li strong{
  color:var(--text);
}

/* =========================
   Code / CLI
   ========================= */
.blogcontent pre{
  overflow:auto;
  margin:1.4rem 0 1.7rem;
  padding:1rem 1rem 1rem;
  border-radius:18px;
  background:#0f172a;
  color:#e5eefc;
  box-shadow:var(--shadow-md);
}

.blogcontent code{
  font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
  font-size:.92em;
}

.blogcontent :not(pre) > code{
  display:inline-block;
  padding:.1em .42em;
  border-radius:.45em;
  background:rgba(15,23,42,.07);
  color:#213049;
}

.blogcontent pre.cli{
  position:relative;
  border:1px solid rgba(255,255,255,.08);
  background:
    linear-gradient(180deg, rgba(255,255,255,.02), rgba(255,255,255,0)),
    #0b1220;
}

.blogcontent pre.cli::before{
  content:"";
  display:block;
  height:14px;
  margin:-.25rem 0 .75rem;
  background:
    radial-gradient(circle at 10px 7px, #ff5f57 0 5px, transparent 5.5px),
    radial-gradient(circle at 30px 7px, #febc2e 0 5px, transparent 5.5px),
    radial-gradient(circle at 50px 7px, #28c840 0 5px, transparent 5.5px);
  opacity:.9;
}

.cli-line{
  display:flex;
  gap:.75rem;
  align-items:flex-start;
}

.cli-prompt{
  flex:0 0 auto;
  color:#87d4ff;
  font-weight:700;
}

.cli-text{
  flex:1 1 auto;
  white-space:pre-wrap;
}

/* =========================
   CTA / Shared embeds
   ========================= */
.article-cta{
  width:min(100%, var(--wide-max));
  margin:var(--space-8) auto 0;
  padding:1.35rem 1.25rem 1.35rem;
  background:
    radial-gradient(900px 360px at 0% 0%, rgba(11,61,145,.09), transparent 50%),
    radial-gradient(700px 260px at 100% 100%, rgba(0,195,0,.06), transparent 50%),
    #fff;
}

.article-cta h2{
  margin:.15rem 0 .7rem;
  font-size:clamp(1.45rem, 2.1vw, 2rem);
  line-height:1.25;
  letter-spacing:-.01em;
}

.article-cta p{
  margin:0;
  color:var(--text-2);
}

.cta-band-actions,
.cta-row{
  display:flex;
  flex-wrap:wrap;
  gap:.9rem;
  margin-top:1.25rem;
}

.cta-primary,
.cta-secondary,
.cta-line,
.btn,
.btn-ghost,
.btn-line{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:.58rem;
  min-height:54px;
  padding:.92rem 1.15rem;
  border-radius:16px;
  border:1px solid rgba(17,24,39,.08);
  box-shadow:0 10px 22px rgba(17,24,39,.08);
  font-weight:800;
  letter-spacing:.02em;
  text-decoration:none;
  transition:transform .18s ease, box-shadow .18s ease, filter .18s ease;
}

.cta-primary:hover,
.cta-secondary:hover,
.cta-line:hover,
.btn:hover,
.btn-ghost:hover,
.btn-line:hover{
  transform:translateY(-2px);
  box-shadow:0 16px 34px rgba(17,24,39,.11);
  filter:brightness(1.02);
}

.cta-primary{
  background:linear-gradient(180deg, rgba(11,61,145,1), rgba(8,50,117,1));
  color:#fff !important;
}

.cta-secondary{
  background:linear-gradient(180deg, rgba(11,61,145,.94), rgba(8,50,117,.94));
  color:#fff !important;
}

.cta-line,
.btn-line{
  background:linear-gradient(180deg, rgba(0,195,0,1), rgba(0,168,0,1));
  color:#fff !important;
}

.btn-ghost{
  background:#fff;
  color:var(--text) !important;
}

.btn-ghost:hover{
  color:var(--navy) !important;
}

/* =========================
   ctaafterblog size tuning
   ========================= */
.ctaafterblog .contact{
  padding:1.1rem 1rem 1.2rem;
}

.ctaafterblog .contact p{
  margin:.15rem 0 .7rem;
  color:var(--text-2);
  line-height:1.75;
}

.ctaafterblog .documentsample{
  width:min(100%, 460px);
  margin:.85rem auto .9rem;
}

.ctaafterblog .lineqr{
  width:min(180px, 70%);
  margin:.8rem auto .75rem;
}

.ctaafterblog .lineqr img{
  border-radius:18px;
  border:1px solid var(--stroke);
  background:#fff;
  box-shadow:var(--shadow-xs);
}

.ctaafterblog .linebutton{
  display:inline-block;
  margin:.15rem auto .85rem;
}

.ctaafterblog .linebutton img{
  display:block;
  width:min(280px, 100%);
  height:auto;
  margin:0 auto;
}

.ctaafterblog .parent-mail-click{
  display:flex;
  justify-content:center;
  margin:.75rem 0 1rem;
}

.ctaafterblog .mail-click{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:.5rem;
  min-height:44px;
  padding:.72rem .95rem;
  border-radius:12px;
  border:1px solid var(--stroke);
  background:rgba(255,255,255,.88);
  color:var(--muted) !important;
  box-shadow:none;
  font-weight:700;
  font-size:.95rem;
  line-height:1;
  transition:
    color .18s ease,
    border-color .18s ease,
    background .18s ease,
    transform .18s ease;
}

.ctaafterblog .mail-click:hover{
  color:var(--navy) !important;
  border-color:rgba(11,61,145,.18);
  background:#fff;
  box-shadow:var(--shadow-xs);
  transform:translateY(-1px);
}

/* =========================
   Popup
   ========================= */
.popup-wrap{
  width:min(100%, var(--wide-max));
  margin:var(--space-7) auto 0;
}

.popup{
  position:relative;
  display:block;
}

.popup-content{
  position:relative;
  background:#fff;
  border:1px solid var(--stroke);
  border-radius:var(--radius-lg);
  box-shadow:var(--shadow-sm);
  padding:1.2rem 1.1rem 1.15rem;
}

.popup-content p{
  margin:0 0 .8rem;
}

.popup-content picture,
.popup-content img{
  border-radius:16px;
}

.close{
  appearance:none;
  position:absolute;
  top:.8rem;
  right:.8rem;
  width:38px;
  height:38px;
  border-radius:999px;
  border:1px solid var(--stroke-2);
  background:#fff;
  color:var(--muted);
  cursor:pointer;
  font-size:1.1rem;
  font-weight:700;
  line-height:1;
}

.close:hover{
  color:var(--navy);
  border-color:rgba(11,61,145,.2);
}

/* =========================
   Related
   ========================= */
.related{
  width:min(100%, var(--wide-max));
  margin:var(--space-8) auto 0;
}

.related-list{
  list-style:none;
  margin:0;
  padding:0;
  display:grid;
  grid-template-columns:repeat(2, minmax(0, 1fr));
  gap:1rem;
}

.related-item{
  margin:0;
}

.related-item a{
  display:block;
  height:100%;
  padding:1rem 1rem .95rem;
  background:#fff;
  border:1px solid var(--stroke);
  border-radius:18px;
  box-shadow:var(--shadow-xs);
  color:inherit;
}

.related-item a:hover{
  border-color:rgba(11,61,145,.16);
  box-shadow:var(--shadow-sm);
  transform:translateY(-2px);
}

.related-item strong{
  display:block;
  color:var(--text);
  line-height:1.5;
  font-size:1rem;
}

.related-item .excerpt{
  margin:.55rem 0 0;
  color:var(--muted);
  font-size:.92rem;
  line-height:1.75;
}

/* =========================
   Article Footer Lead
   ========================= */
.article-social-lead{
  width:min(100%, var(--wide-max));
  margin:var(--space-7) auto 0;
  text-align:center;
}

.article-social-lead p{
  margin:0;
  color:var(--muted);
  font-size:.98rem;
  line-height:1.85;
}

/* =========================
   Embedded Footer SNS
   ========================= */
.snsfooter,
#sns{
  padding: 3% 0;
  background:#ffffff;
}

.snslogo{
  width:min(100%, 980px);
  margin:0 auto;
  padding:0 8px;
  display:grid;
  grid-template-columns:repeat(4, minmax(0, 1fr));
  gap:1rem 1.2rem;
  align-items:start;
}

.social-item,
.standfm,
.note,
.youtube,
.x{
  text-align:center;
}

.social-item img,
.standfm img,
.note img,
.youtube img,
.x img{
  width:min(100%, 116px);
  margin:0 auto .75rem;
}

.social-item a,
.standfm a,
.note a,
.youtube a,
.x a{
  display:inline-block;
  color:var(--text-2);
  font-size:.92rem;
  line-height:1.7;
}

.social-item a:hover,
.standfm a:hover,
.note a:hover,
.youtube a:hover,
.x a:hover{
  color:var(--navy);
}

/* =========================================================
   BLOG MENU (blogmenu.html 構造専用)
   #tabs > li.changetopics > a + .bloglist > ul > li > a
   ========================================================= */
nav.blogmenu{
  width:100%;
  margin:0 auto var(--space-6);
  position:relative;
  z-index:5;
  overflow:visible !important;
}

@media (min-width:1100px){
  nav.blogmenu{
    position:sticky;
    top:24px;
    align-self:start;
    max-height:calc(100vh - 48px);
    overflow:auto !important;
    padding:12px;
    padding-right:8px;
    margin:0;
    background:rgba(255,255,255,.86);
    border:1px solid var(--stroke);
    border-radius:18px;
    box-shadow:var(--shadow-xs);
    backdrop-filter:saturate(180%) blur(8px);
  }

  nav.blogmenu::-webkit-scrollbar{
    width:8px;
  }

  nav.blogmenu::-webkit-scrollbar-thumb{
    background:rgba(17,24,39,.16);
    border-radius:999px;
  }
}

@media (max-width:1099px){
  nav.blogmenu{
    position:relative !important;
    top:auto !important;
    transform:none !important;
    max-height:none !important;
    overflow:visible !important;
  }
}

nav.blogmenu #tabs{
  list-style:none;
  margin:0;
  padding:0;
  display:flex;
  flex-direction:column;
  gap:4px;
}

nav.blogmenu #tabs > li.changetopics{
  list-style:none;
  margin:0;
  padding:0;
  position:relative;
  display:block;
}

nav.blogmenu #tabs > li.changetopics > a{
  display:block;
  width:100%;
  margin:0;
  padding:14px 16px;
  line-height:1.55;
  font-size:1rem;
  font-weight:800;
  color:var(--text);
  background:#fff;
  border:1px solid var(--stroke);
  border-radius:14px;
  box-shadow:var(--shadow-xs);
  cursor:pointer;
  position:relative;
}

nav.blogmenu #tabs > li.changetopics.active > a{
  color:var(--navy);
  border-color:rgba(11,61,145,.2);
  background:rgba(11,61,145,.04);
}

nav.blogmenu #tabs > li.changetopics > a:hover{
  color:var(--navy);
}

nav.blogmenu #tabs > li.changetopics > .bloglist{
  display:block;
  margin:2px 0 0;
  padding:0 14px;
  background:#fff;
  border:1px solid var(--stroke);
  border-radius:16px;
  box-shadow:var(--shadow-xs);
  position:relative;

  max-height:0;
  opacity:0;
  overflow:hidden;
  transform:translateY(-6px);
  pointer-events:none;

  transition:
    max-height .32s ease,
    opacity .24s ease,
    transform .24s ease,
    padding-top .24s ease,
    padding-bottom .24s ease;
}

nav.blogmenu #tabs > li.changetopics > .bloglist.shownlist{
  max-height:1200px;
  opacity:1;
  transform:translateY(0);
  pointer-events:auto;
  padding-top:14px;
  padding-bottom:14px;
}

nav.blogmenu #tabs > li.changetopics > .bloglist > ul{
  list-style:none;
  margin:0;
  padding:0;
}

nav.blogmenu #tabs > li.changetopics > .bloglist > ul > li{
  list-style:none;
  margin:0;
  padding:0;
  position:relative;
  border-bottom:1px solid rgba(17,24,39,.08);
}

nav.blogmenu #tabs > li.changetopics > .bloglist > ul > li:last-child{
  border-bottom:0;
}

nav.blogmenu #tabs > li.changetopics > .bloglist > ul > li > a{
  display:block;
  margin:0;
  padding:12px 8px;
  line-height:1.68;
  font-size:.96rem;
  color:var(--text-2);
  white-space:normal;
  word-break:break-word;
  overflow-wrap:anywhere;
  position:relative;
}

nav.blogmenu #tabs > li.changetopics > .bloglist > ul > li > a:hover{
  color:var(--navy);
  background:rgba(11,61,145,.04);
  border-radius:10px;
}

nav.blogmenu #tabs > li.changetopics > .bloglist li.currentblog > a{
  color:var(--navy);
  font-weight:800;
  pointer-events:none;
  cursor:default;
}

nav.blogmenu #tabs,
nav.blogmenu #tabs > li,
nav.blogmenu #tabs > li > a,
nav.blogmenu .bloglist,
nav.blogmenu .bloglist > ul,
nav.blogmenu .bloglist > ul > li,
nav.blogmenu .bloglist > ul > li > a{
  float:none !important;
  top:auto !important;
  left:auto !important;
  right:auto !important;
  bottom:auto !important;
  box-sizing:border-box !important;
}

nav.blogmenu .bloglist,
nav.blogmenu .bloglist > ul,
nav.blogmenu .bloglist > ul > li{
  height:auto !important;
  min-height:0 !important;
}

nav.blogmenu .bloglist > ul > li > a{
  min-height:unset !important;
}

@media (max-width: 1099px){
  nav.blogmenu{
    margin-top: 1.4rem;
    margin-bottom: var(--space-7);
  }

  nav.blogmenu #tabs{
    gap: 2px;
  }

  nav.blogmenu #tabs > li.changetopics{
    margin: 0;
  }

  nav.blogmenu #tabs > li.changetopics > .bloglist{
    margin-top: 2px;
    margin-bottom: 2px;
    padding: 0;
  }

  nav.blogmenu #tabs > li.changetopics:not(.active) > .bloglist{
    margin-bottom: 0;
  }

  nav.blogmenu #tabs > li.changetopics > .bloglist.shownlist{
    margin-bottom: 20px;
  }
}

/* blog index 検索用 */
.blog-search-panel{
  margin-bottom:1rem;
  padding:1rem;
  background:#fff;
  border:1px solid var(--stroke);
  border-radius:18px;
  box-shadow:var(--shadow-xs);
}

.blog-search-panel input[type="search"]{
  width:100%;
  min-height:48px;
  border:1px solid var(--stroke-2);
  border-radius:14px;
  padding:.8rem .95rem;
  font:inherit;
  color:var(--text);
  background:#fff;
}

.blog-search-panel input[type="search"]:focus{
  outline:none;
  border-color:rgba(11,61,145,.28);
  box-shadow:0 0 0 4px rgba(11,61,145,.08);
}

.blog-search-stats{
  color:var(--muted);
  font-size:.88rem;
}

#search-topics{
  width:min(100%, var(--wide-max));
  margin:1rem auto 0 !important;
  padding:0 !important;
  border:0 !important;
  background:transparent !important;
}

.blog-search-item .result-title{
  color:var(--text);
}

.blog-search-item .result-title:hover{
  color:var(--navy);
}

.blog-search-snippet{
  color:var(--muted) !important;
}

/* =========================
   Back to top
   ========================= */
#back-to-top{
  position:fixed;
  right:clamp(14px, 2.6vw, 24px);
  bottom:calc(var(--sticky-h, 72px) + 28px + env(safe-area-inset-bottom));
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:.35rem;
  min-height:44px;
  padding:.7rem .82rem;
  border:1px solid rgba(17,24,39,.08);
  border-radius:999px;
  background:rgba(255,255,255,.96);
  color:var(--text);
  box-shadow:0 14px 30px rgba(17,24,39,.12);
  opacity:0;
  pointer-events:none;
  transform:translateY(10px);
  transition:opacity .18s ease, transform .18s ease, background .18s ease;
  z-index:9998;
  backdrop-filter:saturate(180%) blur(10px);
}

#back-to-top.show{
  opacity:1;
  pointer-events:auto;
  transform:translateY(0);
}

#back-to-top:hover{
  background:#fff;
  color:var(--navy);
}

/* =========================
   Exit modal
   ========================= */
#exit-modal .box h3{
  margin:0 0 .8rem;
  color:var(--text);
  line-height:1.35;
}

#exit-modal .box p{
  margin:0;
  color:var(--muted);
  line-height:1.8;
}

/* =========================
   Sticky CTA spacing
   ========================= */
body.sticky-present{
  padding-bottom:calc(var(--sticky-h, 72px) + 20px);
}

/* =========================
   Focus states
   ========================= */
a:focus-visible,
button:focus-visible,
input:focus-visible{
  outline:3px solid rgba(11,61,145,.18);
  outline-offset:3px;
}

/* =========================
   Responsive
   ========================= */
@media (max-width:980px){
  .article-layout,
  .article-header,
  .article-body,
  .article-cta,
  .related,
  .popup-wrap,
  .article-social-lead,
  .blogmenu,
  .ctaafterblog{
    width:100%;
  }

  .related-list{
    grid-template-columns:1fr;
  }

  .snslogo{
    grid-template-columns:repeat(2, minmax(0, 1fr));
  }
}

@media (max-width:768px){
  :root{
    --body-line:1.88;
    --space-7:2.6rem;
    --space-8:3.3rem;
  }

  .blogcontainer{
    padding:0 14px;
  }

  .article-meta-top{
    gap:.55rem;
  }

  .article-category{
    min-height:30px;
    font-size:.8rem;
  }

  .article-summary,
  .toc-modern .toc-nav,
  .article-cta,
  .popup-content,
  .related-item a,
  .blog-search-panel,
  .ctaafterblog .contact{
    border-radius:16px;
  }

  .cta-band-actions,
  .cta-row{
    flex-direction:column;
  }

  .cta-primary,
  .cta-secondary,
  .cta-line,
  .btn,
  .btn-line,
  .btn-ghost{
    width:100%;
  }

  .toc-modern .toc-header{
    padding:.9rem 1rem;
  }

  .toc-modern .toc-list{
    padding:.45rem .65rem .75rem;
  }
}

@media (max-width:560px){
  .blogtitle{
    font-size:clamp(1.78rem, 9vw, 2.4rem);
  }

  .article-intro{
    font-size:1rem;
  }

  .article-body h2{
    font-size:1.38rem;
  }

  .article-body h3{
    font-size:1.08rem;
  }

  .snslogo{
    grid-template-columns:1fr 1fr;
    gap:1rem .8rem;
  }

  .social-item img,
  .standfm img,
  .note img,
  .youtube img,
  .x img{
    width:min(100%, 96px);
  }
}

.mobile-article-links{
  margin-top: var(--space-8);
  margin-bottom: var(--space-8);
}

.mobile-article-links .section-head{
  margin-bottom: var(--space-6);
}

@media (max-width: 1099px){
  .article-page{
    padding-top: 1.5rem;
  }

  nav.blogmenu{
    margin-top: 1.4rem;
  }
}

/* =========================
   Reduced Motion
   ========================= */
@media (prefers-reduced-motion: reduce){
  html{
    scroll-behavior:auto;
  }

  *,
  *::before,
  *::after{
    animation:none !important;
    transition:none !important;
  }
}