:root{--ink:#082e54;--text:#273b49;--muted:#5b7180;--blue:#eaf5fb;--mint:#edf7f1;--orange:#b9470a;--line:#dbe6eb;--paper:#fff;--bg:#f6f9fa}
*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:24px}body{margin:0;color:var(--text);background:var(--bg);font-family:"BIZ UDPGothic","Yu Gothic","Meiryo",sans-serif;line-height:1.95;font-size:17px}a{color:var(--ink);text-underline-offset:4px}button{font:inherit}a:focus-visible,button:focus-visible{outline:3px solid var(--orange);outline-offset:5px}img{display:block;max-width:100%;height:auto}.masthead{max-width:1120px;margin:auto;display:flex;justify-content:space-between;align-items:center;gap:16px;padding:22px 36px}.brand{font-weight:700;color:var(--ink);font-size:24px;letter-spacing:.08em;text-decoration:none}.draft{font-size:12px;color:var(--muted);border:1px solid var(--line);background:#fff;padding:3px 12px;border-radius:999px}.shell{max-width:960px;margin:0 auto 52px;padding:52px 72px 46px;background:var(--paper);border:1px solid var(--line);border-radius:24px}.eyebrow{font-size:13px;font-weight:700;color:var(--orange);letter-spacing:.1em;margin:0 0 18px}.hero h1{font-size:clamp(27px,3.4vw,40px);font-weight:700;color:var(--ink);line-height:1.55;letter-spacing:.015em;margin:0 0 26px;overflow-wrap:anywhere}.hero .summary{color:var(--muted);font-size:15px;margin:0 0 26px;padding-left:16px;border-left:3px solid #e6a76e}p{margin:0 0 20px}.intro{margin-top:30px}.contents{margin:34px 0 52px;padding:24px 28px;background:var(--blue);border:1px solid #d6e9f3;border-radius:16px}.contents .title{font-size:14px;font-weight:700;color:var(--ink);margin:0 0 12px}.contents ol{margin:0;padding-left:1.6em}.contents li{margin:6px 0;font-size:15px}.section{margin-top:58px}.section h2{margin:0 0 26px;font-size:clamp(23px,2.5vw,28px);line-height:1.6;color:var(--ink);padding-top:18px;border-top:3px solid #e7b48b}.number{display:block;color:var(--orange);font-size:13px;line-height:1.3;letter-spacing:.12em;margin-bottom:10px}.section ul,.section ol{padding-left:1.6em;margin:0 0 22px}.section li{padding-left:3px;margin-bottom:10px}figure{margin:26px 0 34px;padding:0;border:1px solid var(--line);border-radius:16px;overflow:hidden;background:#fff}.image-button{display:block;padding:0;border:0;width:100%;background:#fff;cursor:zoom-in}.image-button img{width:100%}figcaption{display:flex;align-items:flex-start;justify-content:space-between;gap:16px;padding:14px 18px;background:#f7fafb;font-size:13px;line-height:1.75;color:var(--muted)}.expand-label{flex-shrink:0;color:var(--ink);font-weight:700;font-size:12px;border:1px solid #cfdee5;padding:1px 7px;border-radius:6px;white-space:nowrap}.example{padding:20px 24px;margin:24px 0;border-left:4px solid #96bcaa;background:var(--mint);border-radius:0 12px 12px 0}.example p{margin:0}.example-label{font-size:13px;color:#345c47;font-weight:700;margin-bottom:7px!important}.question{font-weight:700;color:var(--ink)}.consult{margin-top:44px;padding:30px;background:var(--blue);border-radius:18px;border:1px solid #d6e9f3}.consult h2{margin:0 0 18px;padding:0;border:0;font-size:25px;color:var(--ink)}.consult p{font-size:16px}.cta{display:inline-block;padding:12px 24px;background:var(--orange);color:white;font-size:16px;font-weight:700;border-radius:9px;text-decoration:none}.footer{text-align:center;font-size:13px;color:var(--muted);margin:0 16px 38px}.source-note{font-size:12px;color:var(--muted);margin-top:24px}.lightbox{max-width:min(96vw,1550px);width:96vw;max-height:95dvh;border:1px solid var(--line);border-radius:16px;padding:18px;background:white;color:var(--ink)}.lightbox::backdrop{background:rgba(6,23,38,.78)}.lightbox-bar{display:flex;justify-content:space-between;align-items:center;gap:20px;padding:0 0 12px}.lightbox-title{font-size:16px;line-height:1.5;margin:0}.close{white-space:nowrap;cursor:pointer;background:#edf4f7;border:1px solid #c8d8e1;border-radius:8px;padding:6px 14px;font-size:14px;color:var(--ink)}.figure-scroll{overflow:auto;max-height:76dvh}.figure-scroll img{width:100%;max-width:none}.hint{font-size:12px;margin:0 0 10px;color:var(--muted)}.lightbox[open]{display:flex;flex-direction:column}
@media(max-width:680px){body{font-size:16px;line-height:1.95}.masthead{padding:17px 20px}.brand{font-size:20px}.draft{font-size:11px;padding:2px 8px}.shell{margin:0 10px 28px;padding:30px 20px;border-radius:16px}.hero h1{font-size:27px}.hero .summary{font-size:14px}.intro{margin-top:24px}.contents{padding:20px;margin:28px 0 36px}.contents li{font-size:14px}.section{margin-top:42px}.section h2{font-size:22px;margin-bottom:22px}.number{font-size:12px}figure{margin:22px -8px 28px;border-radius:12px}figcaption{font-size:12px;padding:12px;gap:8px;flex-direction:column}.expand-label{font-size:11px}.example{padding:17px 18px}.consult{padding:22px 20px;margin-top:34px}.consult h2{font-size:22px}.cta{display:block;text-align:center;padding:12px 16px}.lightbox{padding:12px;border-radius:12px}.lightbox-title{font-size:13px}.figure-scroll img{width:1000px;max-width:none}.close{font-size:13px;padding:5px 10px}}
.title-line{display:block}.keep{display:inline-block}
@media(max-width:680px){.hero h1{font-size:25px;letter-spacing:0}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}}
@media print{body{background:white}.masthead,.contents,.draft,.expand-label,.source-note,.footer{display:none}.shell{border:0;margin:0;padding:0;max-width:100%}.section{margin-top:28px}figure{break-inside:avoid;max-width:680px;margin:20px auto}.image-button{cursor:default}.consult{break-inside:avoid}.cta{color:var(--ink);background:white;border:1px solid var(--ink)}}

.back-link{font-size:14px}.publish-date{font-size:13px;color:var(--muted);margin:0 0 20px}.footer-nav{display:flex;flex-wrap:wrap;justify-content:center;gap:10px 20px;margin:0 0 14px}.breadcrumb{font-size:13px;line-height:1.6;margin:0 0 24px;color:var(--muted)}