.iso{--iso-grey:#dcdcdc;--iso-grey-deep:#b4b4b4;--iso-grey-pale:#efefef;--iso-paper:#f7f7f5;--iso-card:#fff;--iso-ink:#121212;--iso-sub:#575757;--iso-line:#dddddd;--iso-navy:#103c63;--iso-navy-dark:#0b2b48;--iso-navy-pale:#e7eef5;--iso-red:#c0281f;background:var(--iso-paper);color:var(--iso-ink);min-height:100vh;font-family:var(--sans,"Noto Sans JP",sans-serif);line-height:1.95;overflow-wrap:anywhere}.iso a{color:var(--iso-navy);text-underline-offset:4px}.iso img{max-width:100%;height:auto}.iso blockquote,.iso-band-lines,.iso-desc,.iso-paper{font-family:var(--serif,"Noto Serif JP",serif)}.iso [id]{scroll-margin-top:16px}.iso-sr{position:absolute;width:1px;height:1px;margin:-1px;padding:0;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0}.iso-nowrap{display:inline-block}.iso .iso-center{max-width:none;text-align:center}.iso-header{background:var(--iso-ink);color:#fff;border-bottom:4px solid var(--iso-navy)}.iso-header-inner{display:flex;flex-wrap:wrap;gap:4px 24px;align-items:center;justify-content:space-between;max-width:1080px;margin:0 auto;padding:12px 20px}.iso-brand{margin:0;line-height:1.5}.iso .iso-brand a{display:flex;flex-wrap:wrap;align-items:baseline;gap:0 14px;color:#fff;text-decoration:none;font-size:1.3rem;font-weight:700;letter-spacing:.08em}.iso-brand span{font-size:.76rem;font-weight:500;letter-spacing:.08em;color:var(--iso-grey)}.iso-header nav ul{display:flex;flex-wrap:wrap;gap:2px 22px;margin:0;padding:0;list-style:none}.iso .iso-header nav a{color:#fff;font-size:.9rem;letter-spacing:.1em;text-decoration:none}.iso .iso-header nav a:hover{color:var(--iso-grey);text-decoration:underline}.iso main{max-width:1080px;margin:0 auto;padding:0 20px 20px}.iso-hero{position:relative;margin:0 -20px;background:var(--iso-grey);overflow:hidden}.iso-hero:before{content:"";position:absolute;left:0;top:0;bottom:0;width:22px;background:var(--iso-ink)}.iso-hero-inner{display:grid;grid-template-columns:minmax(0,1.25fr) minmax(0,.75fr);grid-gap:36px;gap:36px;align-items:center;padding:48px 48px 44px 64px}.iso-hero-title{margin:0;font-size:clamp(3.4rem,9vw,6.4rem);font-weight:700;line-height:1.05;letter-spacing:.08em;text-shadow:.05em .05em 0 var(--iso-grey-deep)}.iso-hero-title span{display:block;letter-spacing:.14em}.iso-hero-sub{display:inline-block;margin:22px 0 0;padding:6px 14px;background:#fff;border-left:6px solid var(--iso-navy);font-size:clamp(1.02rem,2.2vw,1.32rem);font-weight:700;letter-spacing:.04em;line-height:1.6}.iso-hero-author{margin:18px 0 0;font-size:1.15rem;font-weight:500;letter-spacing:.24em}.iso-hero-cover{margin:0;text-align:center}.iso-hero-cover img{display:block;margin:0 auto;width:min(280px,86%);box-shadow:0 0 0 1px rgba(0,0,0,.14),10px 16px 30px rgba(20,20,20,.3)}.iso-band{margin:0 -20px;background:#fff;border-bottom:1px solid var(--iso-line)}.iso-band-inner{padding:30px 48px 32px}.iso-band-lead{margin:0 0 10px;color:var(--iso-navy);font-size:clamp(1.25rem,2.8vw,1.7rem);font-weight:700;letter-spacing:.04em;line-height:1.5}.iso-band-lines{margin:0;padding:0;list-style:none}.iso-band-lines li{position:relative;padding:5px 0 5px 1.3em;font-size:clamp(1rem,2vw,1.12rem);font-weight:600;line-height:1.8}.iso-band-lines li:before{content:"";position:absolute;left:0;top:.9em;width:.6em;height:.6em;background:var(--iso-red)}.iso-actions{display:flex;flex-wrap:wrap;gap:10px;margin-top:20px}.iso .iso-btn{display:inline-flex;flex-direction:column;align-items:center;justify-content:center;padding:10px 24px;border:2px solid var(--iso-ink);border-radius:3px;background:#fff;color:var(--iso-ink);font-size:.95rem;font-weight:700;letter-spacing:.08em;line-height:1.6;text-decoration:none;transition:.2s}.iso .iso-btn:hover{background:var(--iso-grey-pale)}.iso .iso-btn-fill{background:var(--iso-navy);border-color:var(--iso-navy);color:#fff}.iso .iso-btn-fill:hover{background:var(--iso-navy-dark);border-color:var(--iso-navy-dark)}.iso .iso-btn-navy{background:var(--iso-ink);color:#fff}.iso .iso-btn-navy:hover{background:var(--iso-navy);border-color:var(--iso-navy)}.iso .iso-btn small{font-size:.76rem;font-weight:500;letter-spacing:.04em}.iso .iso-btn-wide{width:100%}.iso-section{padding:52px 0 6px}.iso-section.iso-first{padding-top:34px}.iso-section>h2{margin:0 0 18px;padding:2px 0 8px 16px;border-left:10px solid var(--iso-ink);border-bottom:2px solid var(--iso-navy);font-size:1.55rem;font-weight:700;letter-spacing:.06em;line-height:1.5}.iso-h2-note{display:inline-block;margin-left:.8em;padding:0 10px;background:var(--iso-red);color:#fff;font-size:.74rem;letter-spacing:.1em;line-height:1.9;vertical-align:.3em}.iso-section p{max-width:48em;margin:0 0 1em}.iso .iso-section-lead{margin-bottom:22px}.iso-page-title{margin:0 0 20px;padding-bottom:10px;border-bottom:5px solid var(--iso-ink);font-size:1.9rem;font-weight:700;letter-spacing:.12em}.iso-h3{margin:0 0 10px;font-size:1.15rem;letter-spacing:.1em}.iso .iso-more{margin-top:20px}.iso .iso-cite{margin-top:8px;color:var(--iso-sub);font-size:.82rem;line-height:1.8}.iso-cta{display:flex;flex-wrap:wrap;justify-content:center;gap:10px}.iso-key{padding-top:40px}.iso-key-box{margin:0;padding:26px 32px 20px;background:#fff;border:1px solid var(--iso-line);border-left:10px solid var(--iso-navy)}.iso-key-box blockquote{margin:0}.iso .iso-key-box blockquote p{max-width:none;margin:0 0 .7em;font-size:1.05rem;line-height:1.95}.iso .iso-key-box blockquote .iso-key-main{font-size:clamp(1.15rem,2.4vw,1.45rem);font-weight:700}.iso-key-box figcaption{color:var(--iso-sub);font-size:.86rem;letter-spacing:.08em}.iso-chapters{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));grid-gap:12px;gap:12px;margin:0;padding:0;list-style:none}.iso .iso-chapters a{display:flex;flex-direction:column;height:100%;box-sizing:border-box;padding:14px 16px 12px;background:#fff;border:1px solid var(--iso-line);border-left:6px solid var(--iso-ink);color:var(--iso-ink);text-decoration:none;transition:.2s}.iso .iso-chapters a:hover{background:var(--iso-navy-pale)}.iso-chapter-no{color:var(--iso-red);font-size:.84rem;font-weight:700;letter-spacing:.12em}.iso-chapters strong{font-size:1.1rem;line-height:1.55}.iso-chapter-count{margin-top:auto;padding-top:6px;color:var(--iso-navy);font-size:.8rem;font-weight:700}.iso-cards{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));grid-gap:18px;gap:18px}.iso-card{display:flex;flex-direction:column;padding:18px 20px 16px;background:var(--iso-card);border:1px solid var(--iso-line);border-top:6px solid var(--iso-navy)}.iso .iso-card-ch{margin:0 0 4px;color:var(--iso-sub);font-size:.78rem;font-weight:700;letter-spacing:.06em}.iso-card-q{margin:0 0 12px;font-size:1.14rem;font-weight:700;letter-spacing:.03em;line-height:1.55}.iso-card-a{margin:0 0 10px;padding:2px 0 2px 14px;border-left:3px solid var(--iso-red)}.iso-card-a:last-child{margin-bottom:0}.iso .iso-card-a p{margin:0;font-size:.98rem;line-height:1.95}.iso-card-a footer{margin-top:4px;color:var(--iso-sub);font-family:var(--sans,"Noto Sans JP",sans-serif);font-size:.78rem}.iso-cases{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));grid-gap:14px;gap:14px;margin:0;padding:0;list-style:none}.iso-cases li{display:flex;flex-direction:column;padding:16px 18px 14px;background:#fff;border:1px solid var(--iso-line);border-top:4px solid var(--iso-ink)}.iso .iso-case-no{margin:0;color:var(--iso-navy);font-size:.82rem;font-weight:700;letter-spacing:.1em}.iso-case-no strong{margin-left:.2em;font-size:1.5rem;line-height:1.2}.iso .iso-case-who{margin:2px 0 8px;font-weight:700;font-size:.98rem;line-height:1.6}.iso-cases blockquote{margin:0;padding-top:8px;border-top:1px dashed var(--iso-line)}.iso .iso-cases blockquote p{margin:0;font-size:.94rem;line-height:1.9}.iso-cases blockquote footer{margin-top:4px;color:var(--iso-sub);font-family:var(--sans,"Noto Sans JP",sans-serif);font-size:.78rem}.iso-cases-all{margin-top:6px}.iso-cases-all li{background:var(--iso-grey-pale);border-color:var(--iso-grey-pale)}.iso-paper{max-width:46em;padding:28px 36px 16px;background:#fff;border:1px solid var(--iso-line)}.iso .iso-paper p{margin:0 0 1em;text-indent:1em;font-size:1.02rem;line-height:2.05}.iso .iso-paper .iso-paper-cont{text-indent:0;color:var(--iso-sub)}.iso .iso-paper .iso-paper-sign{text-align:right;text-indent:0;letter-spacing:.2em}.iso-paper-sub{margin:1.6em 0 .8em;font-family:var(--sans,"Noto Sans JP",sans-serif);font-size:1.08rem;font-weight:700}.iso-spec-body{display:grid;grid-template-columns:170px minmax(0,1fr);grid-gap:30px;gap:30px;align-items:start}.iso-spec-body>img{width:100%;box-shadow:0 0 0 1px rgba(0,0,0,.12),6px 10px 22px rgba(20,20,20,.25)}.iso-spec dl{margin:0 0 6px;max-width:720px;border-top:3px solid var(--iso-ink);background:#fff}.iso-spec dl>div{display:grid;grid-template-columns:9em minmax(0,1fr);border-bottom:1px solid var(--iso-line)}.iso-spec dt{padding:9px 14px;background:var(--iso-grey-pale);font-size:.9rem;font-weight:700;letter-spacing:.06em}.iso-spec dd{margin:0;padding:9px 14px}.iso-desc{max-width:46em;padding:4px 0 4px 16px;border-left:4px solid var(--iso-navy)}.iso .iso-desc p{margin:0 0 .3em;font-size:1.04rem;font-weight:600}.iso-jump{display:flex;flex-wrap:wrap;gap:8px;margin:22px 0 0;padding:0;list-style:none}.iso .iso-jump a{display:inline-block;padding:4px 14px;border:1px solid var(--iso-ink);color:var(--iso-ink);font-size:.88rem;font-weight:700;text-decoration:none}.iso .iso-jump a:hover{background:var(--iso-ink);color:#fff}.iso-toc{padding:22px 26px 14px;background:#fff;border:1px solid var(--iso-line)}.iso .iso-toc p{max-width:none}.iso-toc-line{display:flex;align-items:baseline;gap:8px;margin:0;font-size:.96rem;line-height:1.6}.iso-toc-leader{flex:1 1 24px;min-width:24px;border-bottom:1px dotted #9a9a9a;transform:translateY(-4px)}.iso-toc-page{flex:none;min-width:2em;text-align:right;font-feature-settings:"tnum";font-variant-numeric:tabular-nums}.iso-toc-front{font-weight:700}.iso .iso-toc-chapter h3 a,.iso .iso-toc-front a{color:var(--iso-ink);text-decoration:none}.iso-toc-chapter{margin-top:16px}.iso-toc-chapter h3{padding:6px 0 4px;border-bottom:2px solid var(--iso-ink);font-size:1.05rem;letter-spacing:.04em}.iso-toc-chapter h3 a span{margin-right:.8em;color:var(--iso-red)}.iso .iso-toc-chapter h3 a:hover{color:var(--iso-navy)}.iso .iso-toc-subs{margin:6px 0 0;padding-left:1em;color:var(--iso-sub);font-size:.9rem;line-height:1.95}.iso-chapter{margin:0 0 40px;padding:24px 26px 22px;background:#fff;border:1px solid var(--iso-line);border-top:8px solid var(--iso-ink)}.iso-chapter-head{display:flex;align-items:center;gap:18px;margin-bottom:12px}.iso-chapter-badge{flex:none;display:flex;align-items:baseline;justify-content:center;gap:2px;width:86px;margin:0;padding:4px 0;background:var(--iso-navy);color:#fff;font-size:2.2rem;font-weight:700;line-height:1.3}.iso-chapter-badge span{font-size:.9rem}.iso-chapter-head h3{margin:0;font-size:1.45rem;letter-spacing:.04em;line-height:1.45}.iso .iso-chapter-pages{margin:2px 0 0;color:var(--iso-sub);font-size:.84rem}.iso .iso-chapter-lead{margin:0 0 18px}.iso-chapter-intro{margin:0 0 18px;padding:12px 18px;background:var(--iso-grey-pale);border-left:4px solid var(--iso-grey-deep)}.iso .iso-chapter-intro p{max-width:none;margin:0;font-size:1rem}.iso-chapter-intro footer{margin-top:4px;color:var(--iso-sub);font-family:var(--sans,"Noto Sans JP",sans-serif);font-size:.8rem}.iso-cards-chapter{grid-template-columns:repeat(2,minmax(0,1fr))}.iso-cards-chapter .iso-card{border-top-width:4px}.iso-cards-chapter .iso-card-q{font-size:1.05rem}.iso-profile{padding:24px 28px 14px;background:#fff;border:1px solid var(--iso-line);border-left:8px solid var(--iso-ink)}.iso-author-name{margin:0 0 12px;font-size:1.7rem;letter-spacing:.12em}.iso-author-kana{margin-left:.4em;color:var(--iso-sub);font-size:.95rem;font-weight:500;letter-spacing:.08em}.iso-bio{margin:0;padding:0;list-style:none}.iso-bio li{padding:6px 0;border-bottom:1px solid var(--iso-line)}.iso-bio li:last-child{border-bottom:0}.iso-works{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));grid-gap:0 26px;gap:0 26px;margin:0 0 14px;padding:0;list-style:none}.iso-works li{padding:7px 0;border-bottom:1px solid var(--iso-line)}.iso-works strong{margin-right:.3em}.iso-works span{color:var(--iso-sub);font-size:.88rem}.iso-works-notes{margin:0;padding:12px 18px;background:var(--iso-grey-pale);list-style:none;font-weight:700}.iso-books{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));grid-gap:12px;gap:12px;margin:0;padding:0;list-style:none}.iso-books li{position:relative;display:flex;flex-direction:column;padding:16px 16px 14px;background:#fff;border:1px solid var(--iso-line);border-top:5px solid var(--iso-grey-deep)}.iso-books li.iso-books-current{border-top-color:var(--iso-navy);background:var(--iso-navy-pale)}.iso-books-mark{align-self:flex-start;margin-bottom:6px;padding:0 8px;background:var(--iso-navy);color:#fff;font-size:.74rem;font-weight:700;letter-spacing:.1em}.iso-books strong{font-size:1.02rem;line-height:1.6}.iso-books-sub{margin-top:2px;color:var(--iso-sub);font-size:.84rem;line-height:1.7}.iso-books-meta{margin-top:8px;font-size:.8rem;color:var(--iso-sub)}.iso-books-links{display:flex;flex-direction:column;gap:2px;margin-top:auto;padding-top:10px;font-size:.88rem;font-weight:700}.iso-books-here{color:var(--iso-sub)}.iso-buy{display:grid;grid-template-columns:220px minmax(0,1fr);grid-gap:34px;gap:34px;align-items:start;max-width:840px;margin:0 auto}.iso-buy img{width:100%;box-shadow:0 0 0 1px rgba(0,0,0,.12),6px 10px 24px rgba(20,20,20,.25)}.iso .iso-buy p{margin-top:0}.iso-buy-heading{margin:22px 0 10px;padding-left:10px;border-left:6px solid var(--iso-ink);font-size:1.05rem;letter-spacing:.1em}.iso-buy-links{display:grid;grid-gap:10px;gap:10px}.iso-footer{margin-top:40px;padding:24px 20px 34px;background:var(--iso-ink);color:#e8e8e8;text-align:center;font-size:.86rem;line-height:1.9;border-top:4px solid var(--iso-navy)}.iso-footer p{max-width:52em;margin:4px auto}.iso-footnote{color:#b9b9b9;font-size:.8rem}.iso .iso-publisher a{color:#fff}@media (max-width:1000px){.iso-books,.iso-chapters{grid-template-columns:repeat(2,minmax(0,1fr))}}@media (max-width:960px){.iso-cards,.iso-cases{grid-template-columns:repeat(2,minmax(0,1fr))}}@media (max-width:760px){.iso main{padding:0 16px 16px}.iso-band,.iso-hero{margin:0 -16px}.iso-hero:before{width:12px}.iso-header-inner{padding:10px 16px}.iso-brand span{display:none}.iso-header nav ul{gap:0 16px}.iso-hero-inner{grid-template-columns:minmax(0,1fr);gap:24px;padding:28px 18px 28px 30px}.iso-hero-cover img{width:min(220px,62%)}.iso-band-inner{padding:22px 20px 24px}.iso-actions .iso-btn{flex:1 1 100%}.iso-section{padding-top:40px}.iso-section>h2{font-size:1.32rem;padding-left:12px;border-left-width:8px}.iso-page-title{font-size:1.6rem}.iso-key-box{padding:20px 18px 16px;border-left-width:6px}.iso-books,.iso-cards,.iso-cards-chapter,.iso-cases,.iso-chapters{grid-template-columns:minmax(0,1fr)}.iso-paper{padding:22px 18px 10px}.iso .iso-paper p{font-size:.98rem}.iso-spec-body{grid-template-columns:minmax(0,1fr)}.iso-spec-body>img{width:140px}.iso-spec dl>div{grid-template-columns:7em minmax(0,1fr)}.iso-toc{padding:18px 16px 10px}.iso-chapter{padding:18px 16px 16px}.iso-chapter-head{gap:12px}.iso-chapter-badge{width:66px;font-size:1.7rem}.iso-chapter-head h3{font-size:1.2rem}.iso-profile{padding:20px 18px 10px;border-left-width:6px}.iso-author-name{font-size:1.45rem}.iso-buy,.iso-works{grid-template-columns:minmax(0,1fr)}.iso-buy{gap:20px}.iso-buy img{width:170px}}