:root{--ink:#241F1D;--sub:#6E645C;--gold:#B8965A;--gold-d:#9C7A3F;--ivory:#FAF8F5;--sand:#F2EEE8;--rule:#EAE3D9;--rose:#B08187;--sage:#7E8C6B;
--serif:"Hiragino Mincho ProN","Yu Mincho",serif;--sans:"Hiragino Kaku Gothic ProN","Yu Gothic","Noto Sans JP",sans-serif}
*{box-sizing:border-box}
body{margin:0;background:#fdfaf5;color:var(--ink);font-family:var(--sans);line-height:1.95;font-size:16px;letter-spacing:.01em;-webkit-font-smoothing:antialiased}
a{color:var(--gold-d)}
.wrap{max-width:780px;margin:0 auto;padding:0 20px}
header.top{border-bottom:1px solid var(--rule);background:rgba(255,255,255,.9);backdrop-filter:blur(8px);position:sticky;top:0;z-index:10}
header.top .wrap{display:flex;align-items:center;justify-content:space-between;height:58px}
.brand{font-family:var(--serif);font-size:20px;letter-spacing:.04em}.brand small{display:block;font-family:var(--sans);font-size:9px;letter-spacing:.18em;color:var(--sub);margin-top:1px}
.btn{display:inline-block;background:var(--gold);color:#fff;text-decoration:none;font-size:12.5px;font-weight:700;padding:9px 16px;border-radius:6px}
nav.bc{font-size:11.5px;color:var(--sub);padding:14px 0 0}
nav.bc ol{list-style:none;display:flex;flex-wrap:wrap;gap:6px;margin:0;padding:0}
nav.bc li::after{content:"›";margin-left:6px;color:#c9bdae}nav.bc li:last-child::after{content:""}
nav.bc a{color:var(--sub);text-decoration:none}
article{padding:8px 0 40px}
.eyebrow{font-size:11px;letter-spacing:.14em;text-transform:uppercase;color:var(--gold-d);font-weight:700;margin:22px 0 10px}
h1{font-family:var(--serif);font-size:clamp(26px,4.5vw,36px);line-height:1.4;letter-spacing:.01em;margin:0 0 14px;text-wrap:balance}
.meta{font-size:12px;color:var(--sub);display:flex;gap:14px;flex-wrap:wrap;padding-bottom:8px}
/* eyecatch */
.eyecatch{margin:20px 0 6px;border-radius:16px;overflow:hidden;background:linear-gradient(135deg,#f6ecdd 0%,#f1e6ec 55%,#eef1e7 100%);border:1px solid var(--rule);display:block}
.eyecatch svg{display:block;width:100%;height:auto}
.lead{font-size:16.5px;color:#3a332e;margin:22px 0}
/* callout 結論 */
.callout{position:relative;background:linear-gradient(135deg,#f7efe2,#f4ecdf);border:1px solid #e8dcc4;border-left:4px solid var(--gold);border-radius:12px;padding:20px 22px 20px 56px;margin:24px 0}
.callout::before{content:"✎";position:absolute;left:20px;top:18px;color:var(--gold);font-size:18px}
.callout b{font-family:var(--serif);color:var(--gold-d);display:block;font-size:13px;letter-spacing:.06em;margin-bottom:6px}
/* toc */
.toc{background:#fff;border:1px solid var(--rule);border-radius:12px;padding:18px 22px;margin:26px 0}
.toc p{font-family:var(--serif);font-size:14px;margin:0 0 10px;color:var(--ink);display:flex;align-items:center;gap:8px}
.toc p::before{content:"";width:14px;height:2px;background:var(--gold)}
.toc ol{margin:0;padding-left:1.5em;font-size:14px;columns:2;column-gap:26px}.toc li{margin:6px 0;break-inside:avoid}.toc a{text-decoration:none;color:#4a413b}.toc a:hover{color:var(--gold-d)}
/* H2 with number chip */
h2{font-family:var(--serif);font-size:clamp(20px,3.4vw,25px);line-height:1.45;margin:50px 0 16px;display:flex;align-items:flex-start;gap:12px;text-wrap:balance}
h2 .n{flex:none;font-family:var(--sans);font-size:12px;font-weight:800;color:#fff;background:var(--gold);width:26px;height:26px;border-radius:50%;display:inline-flex;align-items:center;justify-content:center;margin-top:5px;letter-spacing:0}
h3{font-family:var(--serif);font-size:18px;margin:26px 0 10px}
p{margin:14px 0}
ul.dot,ol.b{margin:14px 0;padding-left:1.4em}ul.dot li,ol.b li{margin:8px 0}
ul.dot li{list-style:none;position:relative;padding-left:4px}ul.dot li::before{content:"";position:absolute;left:-14px;top:12px;width:6px;height:6px;border-radius:50%;background:var(--gold)}
strong{font-weight:700}
/* pull quote */
.pull{font-family:var(--serif);font-size:20px;line-height:1.7;color:var(--gold-d);border-left:none;text-align:center;margin:30px 0;padding:6px 10px;position:relative}
.pull::before,.pull::after{content:"”";font-size:30px;color:#dcc9a6}
/* cards */
.cards{display:grid;gap:14px;margin:22px 0}
.cards.c3{grid-template-columns:repeat(3,1fr)}
.cards.c2{grid-template-columns:1fr 1fr}
.card{background:#fff;border:1px solid var(--rule);border-radius:12px;padding:18px 18px}
.card h4{font-family:var(--serif);font-size:16px;margin:0 0 8px;display:flex;align-items:center;gap:7px}
.card p{font-size:13.5px;color:#4a413b;margin:6px 0 0;line-height:1.75}
.card .tag{font-size:11px;color:var(--gold-d);font-weight:700;letter-spacing:.04em}
.card.good{background:#f5f7f0;border-color:#dfe6d2}.card.good h4::before{content:"○";color:var(--sage);font-weight:700}
.card.bad{background:#f8f1ef;border-color:#ecdcd7}.card.bad h4::before{content:"×";color:var(--rose);font-weight:700}
/* steps */
.steps{margin:22px 0;display:flex;flex-direction:column;gap:0}
.step{display:flex;gap:14px;position:relative;padding-bottom:18px}
.step::before{content:"";position:absolute;left:15px;top:32px;bottom:-2px;width:2px;background:var(--rule)}
.step:last-child::before{display:none}
.step .sn{flex:none;width:32px;height:32px;border-radius:50%;background:var(--ink);color:#fff;font-size:13px;font-weight:800;display:flex;align-items:center;justify-content:center;z-index:1}
.step .st{padding-top:3px}.step .st b{font-family:var(--serif);font-size:16px}.step .st p{margin:3px 0 0;font-size:13.5px;color:#4a413b}
/* factor chips */
.chips{display:flex;flex-wrap:wrap;gap:10px;margin:18px 0}
.chip{background:#fff;border:1px solid var(--rule);border-radius:24px;padding:8px 15px;font-size:13px;font-weight:600}
.chip b{color:var(--gold-d);margin-right:5px}
/* stats + bars (data viz) */
.statrow{display:flex;gap:14px;flex-wrap:wrap;margin:20px 0}
.stat{flex:1;min-width:150px;background:linear-gradient(135deg,#fff,#faf5ec);border:1px solid var(--rule);border-radius:12px;padding:16px 18px;text-align:center}
.stat .big{font-family:var(--serif);font-size:34px;color:var(--gold-d);line-height:1}.stat .big small{font-size:15px}
.stat .lb{font-size:12px;color:var(--sub);margin-top:6px}
.chart{background:#fff;border:1px solid var(--rule);border-radius:12px;padding:20px 20px 14px;margin:20px 0}
.chart .ct{font-family:var(--serif);font-size:14px;margin:0 0 14px}
.brow{margin:12px 0}
.brow .bl{font-size:12.5px;color:#4a413b;margin-bottom:5px;display:flex;justify-content:space-between}
.bar{height:12px;border-radius:8px;background:var(--sand);overflow:hidden;position:relative}
.bar span{position:absolute;left:0;top:0;bottom:0;border-radius:8px}
.bar .e{background:#d9c39a}.bar .p{background:linear-gradient(90deg,#c19a55,#9C7A3F)}
.blegend{font-size:11.5px;color:var(--sub);margin-top:8px;display:flex;gap:16px}
.blegend i{display:inline-block;width:11px;height:11px;border-radius:3px;margin-right:5px;vertical-align:-1px}
.src{font-size:12px;color:var(--sub);margin-top:8px}
/* checklist */
.check{list-style:none;padding:0;margin:18px 0}
.check li{position:relative;padding:11px 0 11px 34px;border-bottom:1px solid var(--rule);font-size:14.5px}
.check li::before{content:"";position:absolute;left:4px;top:14px;width:18px;height:18px;border-radius:5px;background:var(--sage);
background-image:url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24"><path d="M5 12.5l4 4L19 7" fill="none" stroke="white" stroke-width="3" stroke-linecap="round" stroke-linejoin="round"/></svg>');background-size:15px;background-repeat:no-repeat;background-position:center}
/* callout boxes */
.point,.warn{border-radius:10px;padding:16px 18px 16px 48px;margin:22px 0;font-size:14px;position:relative;line-height:1.8}
.point{background:#f3f6ee;border:1px solid #dfe6d2}.point::before{content:"POINT";position:absolute;left:16px;top:16px;font-size:9px;font-weight:800;letter-spacing:.06em;color:var(--sage);writing-mode:vertical-rl;text-orientation:upright}
.warn{background:#faf1ee;border:1px solid #ecdcd7;padding-left:46px}.warn::before{content:"⚠";position:absolute;left:16px;top:14px;color:var(--rose);font-size:16px}
/* faq */
.faq{margin:16px 0}
.faq details{border:1px solid var(--rule);border-radius:10px;padding:2px 18px;margin:10px 0;background:#fff}
.faq summary{list-style:none;cursor:pointer;font-family:var(--serif);font-size:16px;padding:15px 30px 15px 0;position:relative}
.faq summary::after{content:"＋";position:absolute;right:2px;top:15px;color:var(--gold);font-size:15px}
.faq details[open] summary::after{content:"−"}
.faq .fa{padding:0 0 15px;font-size:14.5px;color:#4a413b}
/* cta / related / footer */
.cta{background:linear-gradient(135deg,#241f1d,#33261f);color:#efe9e1;border-radius:16px;padding:34px 28px;margin:44px 0;text-align:center}
.cta h3{font-family:var(--serif);color:#fff;font-size:22px;margin:0 0 10px}
.cta p{font-size:14px;color:#c6bbb0;margin:0 auto 18px;max-width:470px}
.cta .btn{background:var(--gold);font-size:14px;padding:14px 28px}
.related{margin:34px 0}.related>p{font-family:var(--serif);font-size:15px;margin:0 0 12px;display:flex;align-items:center;gap:8px}.related>p::before{content:"";width:14px;height:2px;background:var(--gold)}
.related a.rc{display:flex;gap:12px;align-items:center;text-decoration:none;border:1px solid var(--rule);border-radius:10px;padding:14px 16px;margin:8px 0;background:#fff;color:var(--ink)}
.related a.rc .ar{margin-left:auto;color:var(--gold)}
.related a.rc span{font-size:14px}
footer{border-top:1px solid var(--rule);padding:26px 0;font-size:12px;color:var(--sub)}
footer .wrap{display:flex;justify-content:space-between;flex-wrap:wrap;gap:10px}
.disc{font-size:11.5px;color:#9a8d81;margin-top:30px;line-height:1.7}
@media(max-width:560px){.cards.c3{grid-template-columns:1fr}.cards.c2{grid-template-columns:1fr}.toc ol{columns:1}.callout{padding-left:22px}.callout::before{display:none}}