/* コラム（記事一覧・記事ページ）共通スタイル。色・ヘッダー・フッターは corporate-ai/index.html と同じ */
:root{
  --bg:#F7FAF9;
  --text:#1E2D4A;
  --accent:#6BAD9A;
  --accent-dark:#4A9080;
  --card-border:#B8DDD6;
  --light:#E8F4F1;
  --muted:#8A9BB0;
  --sun:#FFD98A;
  --maxw:1080px;
  --readw:720px;
}
*{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;
  font-family:'Noto Sans JP','Arial',sans-serif;
  color:var(--text);
  background:var(--bg);
  line-height:1.9;
  -webkit-font-smoothing:antialiased;
}
a{color:inherit;}
img{max-width:100%;}

/* ====== ヘッダー ====== */
header{
  position:fixed;top:0;left:0;right:0;z-index:50;
  transition:background .35s, border-color .35s, box-shadow .35s;
  border-bottom:1px solid transparent;
}
header.scrolled{
  background:rgba(247,250,249,0.92);
  backdrop-filter:saturate(180%) blur(10px);
  border-bottom:1px solid var(--card-border);
}
.nav{
  max-width:var(--maxw);margin:0 auto;
  display:flex;align-items:center;justify-content:space-between;
  padding:18px 28px;
}
.brand-logo{display:flex;align-items:center;text-decoration:none;}
.brand-mark{height:40px;width:auto;display:block;}
header:not(.scrolled) .brand-mark{filter:drop-shadow(0 1px 8px rgba(10,20,40,0.35));}
@media(max-width:760px){.brand-mark{height:34px;}}
.nav-links{display:flex;align-items:center;gap:28px;}
.nav-links a{text-decoration:none;font-size:14px;font-weight:500;transition:color .2s,opacity .2s;}
.nav-links a:not(.nav-cta):hover{opacity:.6;}
.nav-cta{
  background:var(--accent);color:#fff !important;padding:10px 20px;border-radius:999px;
  font-size:13px;font-weight:700;transition:background .2s;
}
.nav-cta:hover{background:var(--accent-dark);}
header:not(.scrolled) .nav-links a:not(.nav-cta){color:#fff;}
header.scrolled .nav-links a:not(.nav-cta){color:var(--text);}
@media(max-width:760px){
  .nav-links a:not(.nav-cta){display:none;}
  .nav-links{gap:0;}
}

/* ====== ページ見出し（濃紺の帯） ====== */
.page-head{
  background:linear-gradient(135deg,#14233E 0%,#1E2D4A 60%,#2B4A5E 100%);
  color:#fff;
}
.page-head-inner{max-width:var(--maxw);margin:0 auto;padding:140px 28px 64px;}
.page-head .eyebrow{
  display:inline-block;font-family:'Jost',sans-serif;letter-spacing:4px;font-weight:400;
  font-size:13px;color:var(--sun);margin-bottom:16px;
}
.page-head h1{font-size:34px;line-height:1.55;margin:0;font-weight:700;letter-spacing:.5px;max-width:860px;}
.page-head .lead{font-size:16px;line-height:2;max-width:680px;margin:20px 0 0;color:rgba(255,255,255,0.88);}
.page-head .meta{font-size:13.5px;color:rgba(255,255,255,0.78);margin:22px 0 0;}
@media(max-width:760px){
  .page-head-inner{padding:118px 20px 48px;}
  .page-head h1{font-size:24px;letter-spacing:0;}
  .page-head .lead{font-size:15px;}
}

/* ====== パンくず ====== */
.breadcrumb{
  max-width:var(--maxw);margin:0 auto;padding:20px 28px 0;
  font-size:13px;color:var(--muted);
}
.breadcrumb a{color:var(--accent-dark);text-decoration:none;}
.breadcrumb a:hover{text-decoration:underline;}
@media(max-width:760px){.breadcrumb{padding:16px 20px 0;}}

/* ====== ボタン ====== */
.btn{
  display:inline-flex;align-items:center;gap:8px;padding:15px 32px;border-radius:999px;
  font-size:15px;font-weight:700;text-decoration:none;cursor:pointer;border:none;transition:all .2s;
}
.btn-primary{background:var(--accent);color:#fff;}
.btn-primary:hover{background:var(--accent-dark);transform:translateY(-2px);}

/* ====== 記事一覧 ====== */
.list-wrap{max-width:var(--maxw);margin:0 auto;padding:56px 28px 96px;}
.post-list{list-style:none;margin:0;padding:0;display:grid;gap:18px;max-width:820px;}
.post-card{
  display:block;background:#fff;border:1px solid var(--card-border);border-radius:14px;
  padding:26px 28px;text-decoration:none;transition:box-shadow .25s, transform .25s;
}
.post-card:hover{box-shadow:0 10px 30px rgba(107,173,154,0.16);transform:translateY(-2px);}
.post-card .tag{
  display:inline-block;font-size:12px;font-weight:700;color:var(--accent-dark);
  background:var(--light);border-radius:999px;padding:3px 12px;margin-bottom:10px;
}
.post-card h2{font-size:19px;line-height:1.6;margin:0 0 8px;font-weight:700;}
.post-card p{font-size:14.5px;line-height:1.9;margin:0;color:#4A5A72;}
.post-card .more{display:inline-block;margin-top:12px;font-size:14px;font-weight:500;color:var(--accent-dark);}
@media(max-width:760px){.list-wrap{padding:40px 20px 72px;}.post-card{padding:22px 20px;}}

/* ====== 記事本文 ====== */
.article{max-width:var(--readw);margin:0 auto;padding:48px 28px 24px;}
.article h2{
  font-size:23px;line-height:1.6;margin:56px 0 18px;font-weight:700;
  padding-left:16px;border-left:4px solid var(--accent);
}
.article p{font-size:16.5px;line-height:2.05;margin:0 0 20px;}
.article ul,.article ol{margin:0 0 22px;padding-left:1.4em;}
.article li{font-size:16.5px;line-height:1.95;margin-bottom:6px;}
.article strong{color:var(--accent-dark);}
.article blockquote{
  margin:0 0 22px;padding:16px 22px;background:var(--light);border-radius:12px;
  font-size:16px;line-height:1.95;
}
.article blockquote p{margin:0;}
.article .point{
  background:#fff;border:1px solid var(--card-border);border-radius:14px;
  padding:20px 24px;margin:0 0 22px;
}
.article .point ul{margin:0;}
@media(max-width:760px){
  .article{padding:36px 20px 16px;}
  .article h2{font-size:20px;margin-top:44px;}
  .article p,.article li{font-size:15.5px;}
}

/* ====== 筆者 ====== */
.author{
  max-width:var(--readw);margin:8px auto 0;padding:0 28px;
}
.author-box{
  display:flex;gap:18px;align-items:center;background:#fff;border:1px solid var(--card-border);
  border-radius:14px;padding:18px 22px;
}
.author-box img{width:64px;height:64px;border-radius:50%;object-fit:cover;flex:none;}
.author-box p{margin:0;font-size:14px;line-height:1.8;}
.author-box .name{font-weight:700;font-size:15px;}
@media(max-width:760px){.author{padding:0 20px;}}

/* ====== 記事末尾の案内（ご相談窓口） ====== */
.cta-box{
  max-width:var(--readw);margin:40px auto 0;padding:0 28px;
}
.cta-inner{
  background:var(--light);border:1px solid var(--card-border);border-radius:18px;padding:30px 30px 32px;
}
.cta-inner .eyebrow-s{
  display:inline-block;font-family:'Jost',sans-serif;letter-spacing:3px;
  font-size:13px;color:var(--accent-dark);font-weight:500;margin-bottom:8px;
}
.cta-inner h2{font-size:21px;line-height:1.6;margin:0 0 12px;font-weight:700;}
.cta-inner p{font-size:15px;line-height:2;margin:0 0 14px;}
.cta-inner .small{font-size:13px;color:var(--muted);margin-top:14px;}
@media(max-width:760px){.cta-box{padding:0 20px;}.cta-inner{padding:24px 20px 26px;}.cta-inner h2{font-size:19px;}}

.back-list{max-width:var(--readw);margin:36px auto 0;padding:0 28px;font-size:14px;}
.back-list a{color:var(--accent-dark);font-weight:500;}
@media(max-width:760px){.back-list{padding:0 20px;}}

/* ====== フッター ====== */
.wave-foot{position:relative;height:140px;margin-top:72px;}
.wave-foot svg{position:absolute;bottom:0;left:0;width:100%;height:140px;}
footer{background:var(--bg);}
.footer-bottom{text-align:center;padding:0 24px 48px;}
.footer-bottom .fm{font-family:'Jost','Century Gothic',sans-serif;font-size:26px;color:var(--text);margin-bottom:8px;}
.footer-bottom .ft{font-size:13px;color:var(--muted);}
.footer-bottom .back{display:inline-block;margin-top:14px;font-size:14px;color:var(--accent-dark);font-weight:500;}

.nb{white-space:nowrap;}
h1,h2,h3,h4,p,li,blockquote,dd,td{word-break:auto-phrase;}