.rtu{--rtu-navy:#18375d;--rtu-gold:#bb914c;--rtu-ink:#273747;--rtu-muted:#617082;--rtu-line:#dce3e9;--rtu-paper:#fff;--rtu-note:#fbf4ef;max-width:1260px;margin:0 auto;padding:30px 28px 90px;color:var(--rtu-ink);font:16px/1.9 "Noto Sans JP",system-ui,sans-serif;overflow-wrap:anywhere;text-align:left}
.rtu .rtu-en{font-family:Georgia,"Times New Roman",Times,serif;font-kerning:normal;font-variant-ligatures:common-ligatures;letter-spacing:-.012em}
.rtu,.rtu *{box-sizing:border-box}.rtu :where(h1,h2,h3,p,figure,ol,ul){margin:0}.rtu a{color:var(--rtu-navy)}.rtu :where(a,button):focus-visible{outline:3px solid var(--rtu-gold);outline-offset:4px}.rtu-overline{color:#8b673a!important;font:700 11px/1.5 system-ui,sans-serif;letter-spacing:.16em;text-transform:uppercase}.rtu-breadcrumb{display:flex;flex-wrap:wrap;gap:9px;align-items:center;margin-bottom:28px;color:var(--rtu-muted);font-size:12px}.rtu-breadcrumb a{text-decoration:underline;text-underline-offset:3px}.rtu-breadcrumb span[aria-hidden]{color:#aeb9c3}
.rtu-hero,.rtu-chapter-hero{background:linear-gradient(140deg,#f8fafc 0%,#fff 67%);border-top:3px solid var(--rtu-navy);border-bottom:1px solid var(--rtu-line);display:grid;grid-template-columns:minmax(0,1fr) 250px;gap:52px;align-items:center;padding:38px clamp(22px,4vw,58px);margin-bottom:55px;position:relative;overflow:hidden}.rtu-hero:before,.rtu-chapter-hero:before{content:"";position:absolute;right:-100px;top:-90px;width:330px;height:330px;border:1px solid #caa56c60;border-radius:50%;pointer-events:none}.rtu h1{font-family:"Noto Serif JP",Georgia,"Yu Mincho",serif;font-size:clamp(35px,4vw,56px);font-weight:700;line-height:1.32;color:var(--rtu-navy);margin:12px 0 15px;padding:0;border:0}.rtu-hero-subtitle{font-family:"Noto Serif JP","Yu Mincho",serif;font-size:clamp(17px,2vw,23px);line-height:1.65;color:#3c516c!important}.rtu-hero-copy{margin:22px 0 0!important;max-width:620px;color:var(--rtu-muted)!important;font-size:15px}.rtu-hero figure,.rtu-chapter-hero>a{position:relative;display:block;min-width:0;border:1px solid #e6e1dc;background:#fff;padding:8px;box-shadow:0 13px 30px #18375d18;transform:rotate(2deg)}.rtu-hero img,.rtu-chapter-hero img{display:block;width:100%;height:auto;max-height:340px;object-fit:cover;object-position:top}.rtu-hero-button,.rtu-hero-button:visited{display:inline-flex;margin-top:26px;padding:11px 21px;border-radius:3px;background:var(--rtu-navy);color:#fff!important;font-weight:700;font-size:13px;text-decoration:none;gap:22px}.rtu-hero-button:hover{background:#254a78;color:#fff!important}
.rtu-section-heading{scroll-margin-top:100px;margin-bottom:23px}.rtu-section-heading h2{font-family:"Noto Serif JP","Yu Mincho",serif;color:var(--rtu-navy);font-size:clamp(25px,3vw,34px);line-height:1.45;margin:7px 0 9px;padding:0;border:0}.rtu-section-heading>p:last-child{font-size:14px;color:var(--rtu-muted)}.rtu-cards{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:15px}.rtu-card{display:flex;flex-direction:column;background:#fff;border:1px solid var(--rtu-line);border-top:2px solid var(--rtu-gold);padding:24px 26px 18px;min-width:0;transition:border-color .2s,box-shadow .2s}.rtu-card:hover{border-color:#9daebf;box-shadow:0 10px 24px #18375d0d}.rtu-card-number{font:700 11px/1.5 system-ui,sans-serif;letter-spacing:.12em;color:#986e2f}.rtu-card h3{font-family:"Noto Serif JP","Yu Mincho",serif;color:var(--rtu-navy);font-size:18px;line-height:1.55;margin:10px 0 7px;padding:0;border:0}.rtu-card h3 a{text-decoration:none}.rtu-card h3 a:hover{text-decoration:underline;text-underline-offset:3px}.rtu-card p{font-size:13px;line-height:1.8;color:var(--rtu-muted)!important;flex:1;margin-bottom:17px}.rtu-card-foot{display:flex;justify-content:space-between;gap:12px;padding-top:12px;border-top:1px solid #eaeef1;color:#6d7b89;font-size:11px}.rtu-card-foot span:last-child{color:var(--rtu-navy);font-weight:700}
.rtu-introduction{border-top:1px solid var(--rtu-line);margin-top:66px;padding-top:42px}.rtu-introduction .rtu-prose{max-width:800px}.rtu-original-intro{display:inline-block;margin-top:15px;font-size:13px;text-decoration:underline;text-underline-offset:3px}.rtu-download{display:flex;align-items:center;justify-content:space-between;gap:25px;padding:24px 28px;background:#f8f3ec;border-left:4px solid var(--rtu-gold);margin-top:60px}.rtu-download strong{color:var(--rtu-navy);font-size:15px}.rtu-download p{color:var(--rtu-muted)!important;font-size:12px;margin-top:4px}.rtu-download a,.rtu-download a:visited{white-space:nowrap;background:var(--rtu-navy);color:#fff!important;padding:10px 16px;border-radius:3px;font-size:13px;font-weight:700;text-decoration:none}
.rtu-chapter-hero{grid-template-columns:minmax(0,1fr) 200px;padding-block:35px;margin-bottom:44px}.rtu-chapter-hero h1{font-size:clamp(29px,3.2vw,43px)}.rtu-chapter-hero img{max-height:260px}.rtu-page-range{color:var(--rtu-muted)!important;margin-top:23px!important;font-size:12px}.rtu-reading{display:grid;grid-template-columns:175px minmax(0,1fr);gap:48px;align-items:start}.rtu-reading aside{position:sticky;top:90px;max-height:calc(100vh - 110px);overflow:auto}.rtu-toc{border:1px solid var(--rtu-line);padding:19px;background:#fcfdfe;font-size:12px}.rtu-toc strong{font-size:13px;color:var(--rtu-navy)}.rtu-toc ol{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:6px 10px;list-style:none;padding:13px 0 0}.rtu-toc li{margin:0}.rtu-toc a{text-decoration:none;display:block;padding:3px 8px;border-radius:3px}.rtu-toc a:hover{background:#edf1f5}.rtu-back{display:block;margin:14px 0;font-size:12px;text-decoration:underline;text-underline-offset:3px}
.rtu-prose{min-width:0;max-width:850px}.rtu-prose>p,.rtu-prose>.wp-block-group{margin-bottom:1.25em}.rtu-prose p{font-size:15px;line-height:1.95;color:var(--rtu-ink)}.rtu-prose h2,.rtu-prose h3{color:var(--rtu-navy);line-height:1.55;font-family:"Noto Serif JP","Yu Mincho",serif;padding:0;border:0}.rtu-prose h3{font-size:20px;margin:34px 0 13px}.rtu-prose .rtu-page-heading{font:700 18px/1.5 "Noto Serif JP","Yu Mincho",serif;background:#fbf1ea;border-left:3px solid var(--rtu-gold);padding:12px 16px;margin:48px 0 8px;scroll-margin-top:90px}.rtu-prose .rtu-source-link{font-size:12px;margin:0 0 25px!important}.rtu-source-link a{text-decoration:underline;text-underline-offset:3px}.rtu-prose .rtu-cover-note{background:var(--rtu-note);border:1px solid #ecdcd0;border-bottom:4px solid #ded2c6;padding:28px 34px;margin-bottom:38px;max-width:680px;box-shadow:0 8px 20px #18375d0b}.rtu-cover-note p{font-size:14px;line-height:1.85;margin:0 0 13px}.rtu-cover-note p:last-child{margin-bottom:0}.rtu-cover-note h3{font-size:19px;margin:0 0 18px}.rtu-prose .rtu-eyebrow{font-size:12px;font-weight:700;color:#8c6032!important;letter-spacing:.06em;margin:10px 0}.rtu-prose .rtu-check-item{position:relative;padding-left:28px;margin:0 0 17px}.rtu-check-item:before{content:"";position:absolute;left:0;top:.43em;width:15px;height:15px;border:1.5px solid #7b8a96;border-radius:2px;background:#fff}.rtu-prose :where(ul.wp-block-list,ol.wp-block-list){padding-inline-start:1.7rem;list-style-position:outside;margin:15px 0 22px}.rtu-prose li{margin-bottom:6px}.rtu-prose a{text-decoration:underline;text-underline-offset:3px}.rtu-prose :where(img,svg){max-width:100%;height:auto}
.rtu-adjacent{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px;margin:54px 0 0 223px}.rtu-adjacent a{display:grid;gap:8px;background:#f5f8fa;border:1px solid #e5ebef;padding:18px 20px;text-decoration:none}.rtu-adjacent a:hover{border-color:#b6c2ce}.rtu-adjacent small{font-size:11px;color:var(--rtu-muted)}.rtu-adjacent span{font-size:13px;font-weight:700;line-height:1.55}.rtu-source-note{color:var(--rtu-muted)!important;border-top:1px solid var(--rtu-line);padding-top:18px;margin:46px 0 0 223px!important;font-size:12px}
.rtu-scan-dialog{border:0;box-shadow:0 18px 60px #0005;background:#fff;padding:22px;max-width:min(96vw,1200px);max-height:94vh;overflow:auto}.rtu-scan-dialog::backdrop{background:#142840bd}.rtu-scan-dialog header{display:flex;justify-content:space-between;align-items:center;gap:15px;color:var(--rtu-navy);font-size:14px;font-weight:700;margin-bottom:12px}.rtu-scan-dialog button{background:var(--rtu-navy);color:#fff;border:0;padding:7px 12px;cursor:pointer}.rtu-scan-dialog img{display:block;width:auto;max-width:100%;height:auto;margin:auto}.rtu-scan-dialog footer{margin-top:12px;font-size:12px;text-align:right}.rtu-scan-dialog footer a{text-decoration:underline}
@media(max-width:850px){.rtu-reading{grid-template-columns:135px minmax(0,1fr);gap:25px}.rtu-adjacent,.rtu-source-note{margin-left:160px!important}.rtu-hero{gap:25px;grid-template-columns:minmax(0,1fr) 180px}}
@media(max-width:680px){.rtu{padding:20px 17px 65px}.rtu-breadcrumb{margin-bottom:17px}.rtu-hero,.rtu-chapter-hero{grid-template-columns:1fr;gap:24px;padding:27px 22px;margin-bottom:35px}.rtu-hero figure,.rtu-chapter-hero>a{max-width:210px;transform:none}.rtu-hero img,.rtu-chapter-hero img{max-height:240px}.rtu h1{font-size:34px}.rtu-hero-subtitle{font-size:18px}.rtu-hero-copy{font-size:14px}.rtu-cards{grid-template-columns:1fr}.rtu-card{padding:21px}.rtu-introduction{margin-top:44px;padding-top:31px}.rtu-download{display:block;padding:21px}.rtu-download a{display:inline-block;margin-top:15px}.rtu-reading{display:block}.rtu-reading aside{position:static;max-height:none;overflow:visible;margin-bottom:25px}.rtu-toc{padding:14px}.rtu-toc ol{grid-template-columns:repeat(5,minmax(0,1fr));gap:5px}.rtu-toc a{text-align:center;padding:4px}.rtu-prose .rtu-cover-note{padding:22px 20px}.rtu-prose p{font-size:14px}.rtu-prose h3{font-size:18px}.rtu-prose .rtu-page-heading{font-size:17px;margin-top:39px}.rtu-adjacent{margin:38px 0 0!important;grid-template-columns:1fr}.rtu-source-note{margin:36px 0 0!important}.rtu-scan-dialog{padding:12px;max-width:99vw}}
@media(max-width:400px){.rtu-toc ol{grid-template-columns:repeat(4,minmax(0,1fr))}}
@media(prefers-reduced-motion:reduce){.rtu-card{transition:none}}
.rtu-prose .rtu-page-heading{font:600 13px/1.5 "Noto Sans JP",system-ui,sans-serif;color:var(--rtu-muted);background:transparent;border:0;border-top:1px solid var(--rtu-line);padding:16px 0 0;margin:44px 0 4px;letter-spacing:.03em}
.rtu-prose>h3.wp-block-heading{font-size:20px;background:transparent;border:0;border-bottom:1px solid var(--rtu-line);padding:0 0 9px;margin:35px 0 16px}
.rtu-prose .rtu-subheading{font:700 15px/1.65 "Noto Sans JP",system-ui,sans-serif;color:var(--rtu-navy);margin:27px 0 9px;padding:0;border:0}
.rtu-prose .rtu-list{margin:14px 0 25px;padding:18px 22px 18px 43px;background:#f7f9fb;border:1px solid #e3e9ee;border-radius:4px}
.rtu-prose .rtu-list li{padding-left:4px;margin:0 0 9px;line-height:1.8}.rtu-prose .rtu-list li:last-child{margin-bottom:0}
.rtu-prose .rtu-list--grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:8px 28px}.rtu-prose .rtu-list--grid li{margin:0}
.rtu-prose .rtu-list--definitions{border-left:3px solid #91a6b8}.rtu-prose .rtu-list--definitions li::marker{color:var(--rtu-gold)}
.rtu-prose .rtu-list--steps{list-style:none;counter-reset:rtu-step;padding-left:20px}.rtu-prose .rtu-list--steps li{counter-increment:rtu-step;position:relative;padding:7px 8px 7px 44px;min-height:36px}.rtu-prose .rtu-list--steps li:before{content:counter(rtu-step);position:absolute;left:0;top:4px;width:30px;height:30px;display:grid;place-items:center;border-radius:50%;background:var(--rtu-navy);color:#fff;font-weight:800;font-size:12px}
.rtu-prose .rtu-callout{position:relative;font-family:"Noto Serif JP","Yu Mincho",serif;font-size:clamp(18px,2.2vw,25px);font-weight:700;line-height:1.65;color:var(--rtu-navy);padding:22px 25px;margin:31px 0;background:linear-gradient(transparent 58%,#f3d99f 58%,#f3d99f 88%,transparent 88%);text-align:center}
.rtu-prose .rtu-prompt,.rtu-prose .rtu-source-quote{padding:17px 20px;margin:17px 0 23px;background:#f1f5f8;border-left:3px solid var(--rtu-navy);font-family:Georgia,"Times New Roman",serif;font-size:15px;line-height:1.75;color:#263b55}
.rtu-prose .rtu-question{padding:14px 18px;margin:11px 0;background:#fbfaf7;border-left:3px solid #d3b77d;font-size:14px;white-space:pre-line}
.rtu-prose .rtu-question::first-line{font-weight:700;color:var(--rtu-navy)}
.rtu-prose .rtu-person-heading{border-bottom:0!important;border-left:3px solid var(--rtu-gold)!important;background:#fbf8f2!important;padding:11px 15px!important;margin-top:38px!important}
@media(max-width:680px){.rtu-prose .rtu-page-heading{font-size:12px;margin-top:36px}.rtu-prose>h3.wp-block-heading{font-size:18px;padding-bottom:8px}.rtu-prose .rtu-list{padding:15px 16px 15px 36px}.rtu-prose .rtu-list--grid{grid-template-columns:1fr}.rtu-prose .rtu-callout{font-size:18px;padding:17px 10px}.rtu-prose .rtu-prompt,.rtu-prose .rtu-source-quote{padding:15px 16px;font-size:14px}}
.rtu-card-foot .rtu-card-read{display:inline-flex;align-items:center;justify-content:center;min-height:44px;padding:0 10px;margin:-15px -10px;color:var(--rtu-navy);font-size:12px;font-weight:700;text-decoration:none;white-space:nowrap}
.rtu-card-foot .rtu-card-read:hover{text-decoration:underline;text-underline-offset:3px}
.rtu-edit-link{display:inline-block;margin:-12px 0 24px;font-size:12px;font-weight:700;text-decoration:underline;text-underline-offset:3px}