:root{
  --navy:#06349A; --navy-d:#04266f; --orange:#F26A00; --ink:#1b2330; --muted:#5b6675;
  --line:#e4e8ef; --bg:#f6f8fb; --card:#fff; --gold:#c9a227;
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;font-family:"Hiragino Kaku Gothic ProN","Yu Gothic",Meiryo,system-ui,sans-serif;color:var(--ink);background:var(--bg);line-height:1.75;font-size:16px}
a{color:var(--navy);text-decoration:none}
a:hover{text-decoration:underline}
.wrap{max-width:1040px;margin:0 auto;padding:0 18px}
.wrap.narrow{max-width:760px}

/* header */
.site-header{background:var(--navy);position:sticky;top:0;z-index:20}
.site-header .nav{display:flex;align-items:center;justify-content:space-between;height:60px;gap:16px}
.brand{display:flex;align-items:center;gap:10px;color:#fff}
.brand:hover{text-decoration:none}
.brand .mk{width:34px;height:34px;border-radius:7px;background:#fff;object-fit:contain}
.brand .bt{font-weight:800;font-size:17px;line-height:1.05}
.brand .em{color:var(--orange)}
.brand .sub{display:block;font-weight:500;font-size:10.5px;color:#c5d2ee;margin-top:2px}
.hnav{display:flex;align-items:center;gap:14px;flex-wrap:wrap}
.hnav a{color:#dfe7f6;font-size:13.5px;font-weight:600}
.hnav a:hover{color:#fff;text-decoration:none}
.hnav .hnav-cta{background:var(--orange);color:#fff;padding:7px 13px;border-radius:8px}

/* hero / index */
.index-hero{background:linear-gradient(0deg,#fff, #fff);border-bottom:1px solid var(--line);padding:30px 0 22px}
.index-hero .tagline{display:inline-block;background:var(--navy);color:#fff;font-size:11px;font-weight:800;letter-spacing:.12em;padding:3px 9px;border-radius:4px}
.index-hero h1{font-size:26px;margin:11px 0 6px;letter-spacing:.01em}
.index-hero p{color:var(--muted);margin:0;font-size:14.5px}
.cat-nav{display:flex;gap:9px;flex-wrap:wrap;margin:18px 0}
.cat-nav a{border:1px solid var(--line);background:#fff;color:var(--ink);padding:6px 14px;border-radius:999px;font-size:13.5px;font-weight:600}
.cat-nav a.active,.cat-nav a:hover{background:var(--navy);color:#fff;border-color:var(--navy);text-decoration:none}

.post-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(290px,1fr));gap:15px;margin:8px 0 26px}
.post-card{display:block;background:var(--card);border:1px solid var(--line);border-radius:12px;padding:17px 18px;transition:.15s}
.post-card:hover{text-decoration:none;border-color:#cdd6e6;box-shadow:0 6px 20px rgba(6,52,154,.07);transform:translateY(-1px)}
.post-cat{display:inline-block;font-size:11px;font-weight:800;color:var(--navy);background:#eef3fc;padding:2px 8px;border-radius:4px}
.post-title{font-size:16.5px;line-height:1.5;margin:9px 0 7px;color:var(--ink)}
.post-desc{font-size:13px;color:var(--muted);margin:0 0 11px}
.post-meta{display:flex;gap:10px;align-items:center;font-size:11.5px;color:#94a0b2}
.post-meta .src{margin-left:auto}
.empty{color:var(--muted);padding:30px 0}

/* article */
.article-main{padding:18px 0 40px}
.breadcrumb{font-size:12px;color:var(--muted);margin:6px 0 16px}
.article-cat{display:inline-block;font-size:11.5px;font-weight:800;color:#fff;background:var(--navy);padding:3px 10px;border-radius:5px}
.article-title{font-size:25px;line-height:1.45;margin:12px 0 12px;letter-spacing:.01em}
.article-meta{display:flex;gap:14px;flex-wrap:wrap;align-items:center;font-size:12.5px;color:var(--muted);border-bottom:1px solid var(--line);padding-bottom:14px;margin-bottom:20px}
.article-meta .src{color:var(--navy);font-weight:600}
.article-body{font-size:16px;line-height:1.95}
.article-body h2{font-size:19px;border-left:5px solid var(--orange);padding-left:11px;margin:32px 0 14px}
.article-body h3{font-size:16.5px;margin:24px 0 10px}
.article-body p{margin:16px 0}
.article-body ul{padding-left:1.25em;margin:14px 0;list-style:none}
.article-body li{margin:11px 0;padding-left:1.1em;position:relative;line-height:1.8}
.article-body li::before{content:"";position:absolute;left:0;top:.7em;width:7px;height:7px;border-radius:50%;background:var(--orange)}
.article-body strong{color:var(--navy-d)}
.article-body mark{background:#fff1c2;color:#8a5a00;padding:0 3px;border-radius:3px}
.article-body blockquote{border-left:3px solid var(--line);background:#fafbfd;color:var(--muted);margin:16px 0;padding:9px 15px;font-size:14px;border-radius:0 7px 7px 0}
.article-body a[rel*=nofollow]{color:var(--navy);text-decoration:underline;text-underline-offset:2px}

/* 結論ファースト 先頭の強調段落 */
.article-body p:first-of-type{background:#eef3fc;border:1px solid #d8e3f7;border-radius:10px;padding:14px 16px;font-size:15.5px}

/* CTA */
.cta-box{border-radius:13px;padding:18px 20px;margin:24px 0;border:1px solid var(--line);background:#fff}
.cta-box.buy{background:#fff6ef;border-color:#ffd9b8}
.cta-box.sell{background:#eef6ff;border-color:#c9e0fb}
.cta-box.soudan{background:#f4f1ff;border-color:#ddd2f7}
.cta-eyebrow{font-size:12px;font-weight:800;color:var(--muted);letter-spacing:.04em}
.cta-lead{margin:6px 0 13px;font-size:15px}
.cta-btn{display:inline-block;font-weight:800;color:#fff;padding:11px 20px;border-radius:9px;font-size:14.5px}
.cta-btn.buy{background:var(--orange)}
.cta-btn.sell{background:var(--navy)}
.cta-btn.soudan{background:#6a4fc0}
.cta-btn:hover{text-decoration:none;filter:brightness(.96)}

/* こうのすけ吹き出し */
.kono-box{display:flex;gap:13px;align-items:flex-start;background:#f7f9fc;border:1px solid #e2e7ef;border-left:4px solid var(--gold);border-radius:10px;padding:13px 15px;margin:20px 0}
.kono-box img{width:46px;height:46px;border-radius:50%;flex:none;object-fit:cover}
.kono-name{font-size:12px;font-weight:700;color:#993c1d;margin-bottom:3px}
.kono-body{font-size:14px;line-height:1.7}

/* 2カラム（本文＋サイドバー） */
.article-grid{display:grid;grid-template-columns:minmax(0,1fr) 312px;gap:34px;align-items:start}
.article-col{min-width:0}
.aside-sticky{position:sticky;top:74px;display:flex;flex-direction:column;gap:15px}
.article-meta .byline{color:var(--navy);font-weight:600}

/* 本文内 内部リンク（自動付与） */
.article-body a.ilink{color:var(--navy);font-weight:700;border-bottom:1px dotted var(--navy);text-decoration:none}
.article-body a.ilink:hover{background:#eef3fc;text-decoration:none}

/* 目次 */
.toc{background:#f7f9fc;border:1px solid var(--line);border-radius:10px;padding:13px 16px;margin:16px 0 6px}
.toc-t{font-weight:800;font-size:13px;color:var(--navy);margin-bottom:6px}
.toc ol{margin:0;padding-left:1.2em}
.toc li{margin:5px 0;font-size:13.5px;line-height:1.5}
.toc li.l3{margin-left:1em;font-size:13px}

/* 著者ボックス */
.author-box{display:flex;gap:14px;align-items:flex-start;background:#fff;border:1px solid var(--line);border-radius:12px;padding:15px 17px;margin:24px 0}
.au-av{width:54px;height:54px;border-radius:50%;object-fit:cover;flex:none;background:#eef3fc}
.au-name{font-weight:800;font-size:15px}
.au-title{display:block;font-weight:600;font-size:11.5px;color:var(--muted);margin-top:2px}
.au-bio{font-size:13px;color:var(--muted);margin:7px 0 0;line-height:1.7}

/* 関連ニュース */
.related{margin:26px 0 6px}
.rel-h{font-size:17px;border-left:5px solid var(--orange);padding-left:11px;margin:0 0 14px}
.rel-list{display:grid;grid-template-columns:1fr 1fr;gap:11px}
.rel-item{display:flex;flex-direction:column;gap:6px;border:1px solid var(--line);border-radius:10px;padding:12px 14px;background:#fff}
.rel-item:hover{border-color:#cdd6e6;text-decoration:none;box-shadow:0 4px 14px rgba(6,52,154,.06)}
.rel-cat{font-size:10.5px;font-weight:800;color:var(--navy);background:#eef3fc;align-self:flex-start;padding:1px 7px;border-radius:4px}
.rel-ttl{font-size:13.5px;line-height:1.5;color:var(--ink)}

/* サイドバー：診断CTA */
.diag-w{background:#fff;border:1px solid var(--line);border-radius:12px;padding:15px}
.diag-h{font-weight:800;font-size:13.5px;color:var(--navy);margin-bottom:6px;text-align:center}
.diag-b{display:block;text-align:center;font-weight:800;font-size:13.5px;color:#fff;padding:11px;border-radius:9px;margin-top:8px}
.diag-b.buy{background:var(--orange)}
.diag-b.sell{background:var(--navy)}
.diag-b.soudan{background:#6a4fc0}
.diag-b:hover{text-decoration:none;filter:brightness(.96)}

/* サイドバー：注目ニュース / ランキング */
.rk-box,.rkw{background:#fff;border:1px solid var(--line);border-radius:12px;padding:14px 15px}
.rk-h,.rkw-h{font-weight:800;font-size:13.5px;color:var(--navy);border-bottom:2px solid var(--orange);padding-bottom:7px;margin-bottom:4px}
.rk-item{display:flex;gap:9px;align-items:flex-start;padding:9px 0;border-bottom:1px solid #f0f3f8}
.rk-item:last-child{border-bottom:0}
.rk-item:hover{text-decoration:none}
.rk-no{flex:none;width:20px;height:20px;border-radius:50%;background:var(--navy);color:#fff;font-size:11px;font-weight:800;display:flex;align-items:center;justify-content:center;margin-top:1px}
.rk-ttl{font-size:12.5px;line-height:1.55;color:var(--ink)}
.rk-item:hover .rk-ttl{color:var(--navy)}
.rkw-list{margin:6px 0 0;padding-left:1.3em;font-size:12.5px}
.rkw-list li{margin:7px 0}
.rkw-v{color:var(--orange);font-weight:800;margin-left:6px}

/* サイドバー：初心者カード */
.ob-card{background:#eef3fc;border:1px solid #d8e3f7;border-radius:12px;padding:14px 15px}
.ob-h{font-weight:800;font-size:13.5px;color:var(--navy);margin-bottom:6px}
.ob-list{margin:0;padding-left:1.1em;font-size:13px}
.ob-list li{margin:8px 0;line-height:1.55}

@media(max-width:880px){
  .article-grid{grid-template-columns:1fr;gap:24px}
  .aside-sticky{position:static}
  .rel-list{grid-template-columns:1fr}
}

/* footer */
.site-footer{background:var(--navy-d);color:#cdd8ef;margin-top:30px;padding:30px 0 26px}
.site-footer a{color:#dfe7f6}
.fcols{display:flex;gap:34px;flex-wrap:wrap;justify-content:space-between}
.fbrand{font-weight:800;color:#fff;font-size:17px}
.fbrand .em{color:var(--orange)}
.fdesc{font-size:12.5px;color:#aebcda;max-width:430px;margin:8px 0 0}
.fnav{display:flex;flex-direction:column;gap:7px;font-size:13px}
.fcopy{border-top:1px solid #1d3e86;margin-top:22px;padding-top:15px;font-size:11px;color:#90a2cd}
.disclaimer{display:block;margin-top:7px;line-height:1.6}

@media(max-width:640px){
  .brand .sub{display:none}
  .hnav a:not(.hnav-cta){display:none}
  .index-hero h1{font-size:21px}
  .article-title{font-size:22px;line-height:1.5}
  .post-grid{grid-template-columns:1fr}
  /* スマホ可読性：行間・段落間・余白を広げ、文字を少し大きく */
  .article-main{padding:14px 0 36px}
  .wrap{padding:0 16px}
  .article-body{font-size:16.5px;line-height:2.0}
  .article-body p{margin:18px 0}
  .article-body p:first-of-type{padding:15px 16px;line-height:1.9}
  .article-body h2{font-size:18px;margin:30px 0 12px}
  .article-body li{margin:13px 0;line-height:1.85}
  .cta-box{padding:16px 16px;margin:22px 0}
}

.brand .bt .nm{white-space:nowrap}
.mobile-cta{display:none}
@media(max-width:720px){.mobile-cta{display:flex;align-items:center;justify-content:center;position:fixed;left:0;right:0;bottom:0;z-index:120;background:#F26A00;color:#fff;font-weight:800;font-size:15px;padding:14px;text-decoration:none;box-shadow:0 -4px 16px rgba(0,0,0,.14)}body{padding-bottom:60px}}

.mnav{display:none}
@media(max-width:720px){
.mobile-cta{bottom:55px;padding:13px}
.mnav{display:grid;grid-template-columns:repeat(4,1fr);position:fixed;left:0;right:0;bottom:0;z-index:121;background:#fff;border-top:1px solid #e7ecf3}
.mnav a{display:flex;flex-direction:column;align-items:center;gap:2px;padding:7px 0;text-decoration:none;color:#5b6b80;font-size:10px;font-weight:700}
.mnav a.cur{color:#0f2747}
.mnav svg{width:20px;height:20px}
body{padding-bottom:116px}
}

/* ───────── JIN風部品＋パワポ図解（脱AI感・線画アイコン・白背景・自己完結：色は--jn*で定義） ───────── */
:root{ --jn:#06349A; --jn2:#08266F; --jo:#F26A00; --jp:#EEF5FF; --jl:#D9E6F5; --jm:#637389; }
.jin-ic{display:inline-block;width:1.05em;height:1.05em;vertical-align:-.16em;fill:none;stroke:currentColor;stroke-width:2;stroke-linecap:round;stroke-linejoin:round;flex:none}
.jin-talk{display:flex;gap:12px;align-items:flex-start;margin:20px 0}
.jin-talk.r{flex-direction:row-reverse}
.jin-talk .jin-face{width:52px;height:52px;border-radius:50%;flex:none;display:flex;align-items:center;justify-content:center;border:2px solid var(--jl);background:#fff;color:var(--jm)}
.jin-talk .jin-face .jin-ic{width:26px;height:26px}
.jin-talk .jin-face.k{background:var(--jn);border-color:var(--jn);color:#fff}
.jin-talk .jin-bubble{position:relative;background:#fff;border:1.5px solid var(--jl);border-radius:14px;padding:12px 15px;font-size:15px;line-height:1.8;box-shadow:0 3px 10px rgba(6,52,154,.05);max-width:78%}
.jin-talk:not(.r) .jin-bubble::before{content:"";position:absolute;left:-9px;top:18px;border:8px solid transparent;border-right-color:#fff;filter:drop-shadow(-1px 0 0 var(--jl))}
.jin-talk.r .jin-bubble{background:#fff6ef;border-color:#ffd9bd}
.jin-talk.r .jin-bubble::after{content:"";position:absolute;right:-9px;top:18px;border:8px solid transparent;border-left-color:#fff6ef}
.jin-talk .jin-who{font-size:11.5px;color:var(--jm);font-weight:800;margin-bottom:3px}
.jin-box{border-radius:14px;padding:15px 18px;margin:22px 0;border:1.5px solid}
.jin-box .jin-bh{font-weight:800;font-size:15px;display:flex;align-items:center;gap:8px;margin-bottom:5px}
.jin-box .jin-bh .jin-ic{width:19px;height:19px}
.jin-box p{margin:5px 0}
.jin-box.point{background:var(--jp);border-color:#cfe0f6}.jin-box.point .jin-bh{color:var(--jn)}
.jin-box.warn{background:#fff6f4;border-color:#ffd0c4}.jin-box.warn .jin-bh{color:var(--jo)}
.jin-box.memo{background:#fffdf2;border-color:#f2e9b8}.jin-box.memo .jin-bh{color:#a8880c}
.jin-box.check{background:#f2fbf5;border-color:#c4e9d1}.jin-box.check .jin-bh{color:#1c8a4b}
.jin-box.check ul{list-style:none;padding-left:2px;margin:8px 0 2px}
.jin-box.check li{padding-left:30px;position:relative;margin:7px 0}
.jin-box.check li .jin-ic{position:absolute;left:2px;top:4px;width:18px;height:18px;color:#1c8a4b;stroke-width:2.5}
.jin-insight{border:2px solid var(--jn);border-radius:16px;overflow:hidden;margin:28px 0;box-shadow:0 6px 22px rgba(6,52,154,.07);background:#fff}
.jin-insight .jin-cap{background:var(--jn);color:#fff;font-weight:800;font-size:13px;padding:9px 16px;display:flex;align-items:center;gap:8px}
.jin-insight .jin-cap .jin-ic{width:16px;height:16px}
.jin-insight .jin-ibody{padding:16px 18px}
.jin-step{margin:12px 0}
.jin-step .jin-lbl{display:inline-block;font-weight:800;font-size:12px;color:#fff;background:var(--jo);padding:2px 10px;border-radius:6px;margin-bottom:5px}
.jin-step.q .jin-lbl{background:var(--jn2)}.jin-step.d .jin-lbl{background:#3d6db0}.jin-step.i .jin-lbl{background:var(--jo)}.jin-step.c .jin-lbl{background:#1c8a4b}
.jin-src{font-size:12px;color:var(--jm);margin-top:8px;border-top:1px dashed var(--jl);padding-top:7px}
.fig-process{display:flex;gap:6px;flex-wrap:wrap;margin:24px 0}
.fig-process .fig-seg{flex:1;min-width:150px;color:#fff;padding:14px 20px 14px 26px;position:relative;background:var(--jn);clip-path:polygon(0 0,calc(100% - 16px) 0,100% 50%,calc(100% - 16px) 100%,0 100%,16px 50%)}
.fig-process .fig-seg.alt{background:var(--jn2)}
.fig-process .fig-seg.last{background:var(--jo)}
.fig-process .fig-seg.first{clip-path:polygon(0 0,calc(100% - 16px) 0,100% 50%,calc(100% - 16px) 100%,0 100%)}
.fig-process .fig-seg .n{font-size:11px;font-weight:800;opacity:.85;letter-spacing:.08em}
.fig-process .fig-seg .t{font-size:14.5px;font-weight:800;margin:2px 0 0;line-height:1.4}
.fig-process .fig-seg .s{font-size:11px;opacity:.9;margin-top:3px;line-height:1.5}
.fig-cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:13px;margin:26px 0 24px}
.fig-cards .fig-ncard{border:1px solid var(--jl);border-radius:13px;padding:15px 14px 13px;position:relative;background:#fbfcfe}
.fig-cards .fig-ncard .bdg{position:absolute;top:-11px;left:13px;width:26px;height:26px;border-radius:8px;background:var(--jo);color:#fff;font-weight:800;font-size:13px;display:flex;align-items:center;justify-content:center;box-shadow:0 3px 8px rgba(242,106,0,.3)}
.fig-cards .fig-ncard .h{display:flex;align-items:center;gap:7px;margin-top:8px;color:var(--jn);font-weight:800;font-size:13.5px}
.fig-cards .fig-ncard .h .jin-ic{width:17px;height:17px;color:var(--jn)}
.fig-cards .fig-ncard .d{font-size:12px;color:#4b5563;line-height:1.65;margin-top:6px}
.fig-compare{display:grid;grid-template-columns:1fr 1fr;gap:14px;margin:24px 0}
.fig-compare .fig-col{border-radius:13px;overflow:hidden;border:1px solid var(--jl)}
.fig-compare .fig-col .hd{padding:11px 14px;color:#fff;font-weight:800;font-size:14px;display:flex;align-items:center;gap:8px}
.fig-compare .fig-col .hd .jin-ic{width:18px;height:18px;color:#fff}
.fig-compare .fig-col.bad .hd{background:var(--jo)}
.fig-compare .fig-col.good .hd{background:var(--jn)}
.fig-compare .fig-col ul{list-style:none;padding:12px 15px;margin:0}
.fig-compare .fig-col li{padding-left:24px;position:relative;margin:9px 0;font-size:12.5px;line-height:1.6;color:#26313f}
.fig-compare .fig-col li .jin-ic{position:absolute;left:0;top:3px;width:16px;height:16px}
.fig-compare .fig-col.bad li .jin-ic{color:var(--jo)}
.fig-compare .fig-col.good li .jin-ic{color:#1c8a4b}
@media(max-width:540px){.fig-compare{grid-template-columns:1fr}}