@charset "UTF-8";
:root{--navy:#0d2338;--navy2:#193956;--deep:#071725;--sea:#087da2;--aqua:#40b6bd;--gold:#e1b43f;--gold2:#f5d56d;--green:#287854;--ink:#172638;--muted:#617185;--bg:#edf4f7;--card:#fff;--line:#d3e0e7;--soft:#eaf2f6;--danger:#b93b42;--shadow:0 13px 34px rgba(19,48,67,.09);--radius:18px;--content:1180px}
*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:86px}body{margin:0;background:var(--bg);color:var(--ink);font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","Noto Sans JP","Hiragino Kaku Gothic ProN","Yu Gothic",Meiryo,sans-serif;font-size:16px;line-height:1.75;-webkit-text-size-adjust:100%;overflow-wrap:anywhere}img{max-width:100%;height:auto}a{color:#075d96;text-decoration-thickness:1px;text-underline-offset:.22em}a:hover{color:#063e65}.sr-only{position:absolute!important;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}.skip-link{position:fixed;left:12px;top:-100px;z-index:9999;background:#fff;color:#000;padding:10px 16px;border-radius:8px}.skip-link:focus{top:12px}
.site-header{position:sticky;top:0;z-index:1000;background:linear-gradient(135deg,var(--deep),var(--navy));border-bottom:3px solid var(--gold);box-shadow:0 4px 16px rgba(7,23,37,.2)}.header-inner{max-width:var(--content);height:70px;margin:auto;padding:0 20px;display:flex;align-items:center;gap:28px}.site-brand{display:flex;align-items:baseline;gap:10px;color:#fff;text-decoration:none;font-weight:850;white-space:nowrap}.site-brand span{font-size:1.23rem;letter-spacing:.02em}.site-brand small{color:var(--gold2);font-weight:850}.global-nav{margin-left:auto;display:flex;align-items:center;gap:19px}.global-nav a{color:#fff;text-decoration:none;font-weight:750;font-size:.91rem;white-space:nowrap}.global-nav a:hover{color:var(--gold2)}.menu-button{display:none;margin-left:auto;width:48px;height:44px;border:1px solid rgba(255,255,255,.35);border-radius:10px;background:rgba(255,255,255,.06);color:#fff}.menu-icon,.menu-icon:before,.menu-icon:after{display:block;width:24px;height:2px;background:#fff;border-radius:2px;content:"";margin:auto;position:relative}.menu-icon:before{position:absolute;top:-8px}.menu-icon:after{position:absolute;top:8px}
.page-shell{max-width:var(--content);margin:0 auto;padding:0 20px 60px}.breadcrumbs{padding:14px 2px 10px}.breadcrumbs ol{display:flex;flex-wrap:wrap;gap:6px 10px;list-style:none;margin:0;padding:0;font-size:.85rem;color:var(--muted)}.breadcrumbs li+li:before{content:"›";margin-right:10px;color:#98a8b6}.page-hero{background:linear-gradient(135deg,var(--navy),#24516f);color:#fff;border-radius:var(--radius);padding:30px 34px;margin-bottom:16px;box-shadow:var(--shadow)}.page-hero .eyebrow{margin:0 0 6px;color:var(--gold2);font-size:.78rem;font-weight:850;letter-spacing:.12em}.page-hero h1{margin:0;font-size:clamp(1.65rem,4vw,2.55rem);line-height:1.3}.page-lead{margin:10px 0 0;color:#dbeaf0;max-width:920px}.context-nav{display:flex;flex-wrap:wrap;gap:8px;margin:0 0 20px;padding:10px;background:#fff;border:1px solid var(--line);border-radius:14px}.context-nav a{padding:7px 11px;border-radius:999px;background:var(--soft);text-decoration:none;font-weight:750;white-space:nowrap}.content-stack{display:grid;gap:18px}.content-card,.walkthrough-section,.related-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow)}.content-card{padding:26px}.content-card h2{margin-top:0}.notice{margin:0 0 18px;padding:14px 16px;background:#eff7fa;border-left:5px solid var(--sea);border-radius:10px;color:#3b5364}.walkthrough-section{overflow:hidden}.walkthrough-section>h2{margin:0;padding:15px 20px;background:var(--navy2);color:#fff;font-size:1.18rem}.steps{list-style:none;margin:0;padding:0}.steps li{display:grid;grid-template-columns:58px minmax(0,1fr);gap:0;border-bottom:1px solid var(--line);align-items:stretch}.steps li:last-child{border-bottom:0}.step-number{display:grid;place-items:center;padding:12px 6px;background:#eef4f7;color:#0a6890;font-weight:850;font-variant-numeric:tabular-nums;border-right:1px solid var(--line)}.steps li>div{padding:12px 15px}.steps li:not(:has(.step-number)){grid-template-columns:1fr}.steps li:not(:has(.step-number))>div{grid-column:1}.related-card{margin-top:24px;padding:22px}.related-card h2{margin:0 0 12px;font-size:1.15rem}.related-links{display:flex;flex-wrap:wrap;gap:9px}.related-links a{padding:8px 12px;background:var(--soft);border-radius:9px;text-decoration:none;font-weight:700}
.home-page .page-shell{max-width:none;padding:0}.home-page .breadcrumbs,.home-page .page-hero,.home-page .context-nav{display:none}.home-hero{background:linear-gradient(135deg,#071a2a 0%,#0b4b68 62%,#147d86 100%);color:#fff;overflow:hidden}.home-hero-inner{max-width:var(--content);min-height:520px;margin:auto;padding:74px 26px;display:grid;grid-template-columns:minmax(0,1fr) 360px;align-items:center;gap:60px;position:relative}.home-hero-inner:after{content:"";position:absolute;left:-20%;right:-20%;bottom:-90px;height:180px;border-radius:50%;background:rgba(255,255,255,.07)}.hero-kicker{margin:0 0 9px;color:var(--gold2);font-size:.78rem;font-weight:900;letter-spacing:.18em}.hero-copy h1{margin:0;font-size:clamp(2.6rem,6vw,5.25rem);line-height:1.12;letter-spacing:.01em}.hero-copy>p:not(.hero-kicker){max-width:720px;color:#d9edf1;font-size:1.05rem}.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:26px}.button{display:inline-flex;align-items:center;justify-content:center;min-height:48px;padding:10px 18px;border-radius:11px;text-decoration:none;font-weight:850}.button.primary{background:var(--gold);color:#102437}.button.ghost{border:1px solid rgba(255,255,255,.55);color:#fff;background:rgba(255,255,255,.07)}.button.secondary{background:var(--sea);color:#fff}.hero-mark{position:relative;z-index:2;padding:25px;border:1px solid rgba(255,255,255,.25);border-radius:24px;background:rgba(255,255,255,.1);backdrop-filter:blur(5px);text-align:center}.hero-mark img{width:220px;image-rendering:auto;background:#fff;border-radius:12px}.hero-mark strong{display:block;margin-top:14px;font-size:1.8rem;color:var(--gold2)}.hero-mark span{font-size:.75rem;letter-spacing:.14em;color:#d9edf1}.home-section{max-width:var(--content);margin:auto;padding:62px 20px}.section-heading{margin-bottom:22px}.section-heading p,.section-kicker{margin:0;color:var(--sea);font-weight:850;font-size:.76rem;letter-spacing:.15em}.section-heading h2,.version-home h2{margin:4px 0 0;font-size:clamp(1.55rem,3vw,2.25rem)}.quick-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}.feature-card{display:block;padding:22px;border:1px solid var(--line);border-radius:16px;background:#fff;color:var(--ink);text-decoration:none;box-shadow:var(--shadow);transition:.15s transform,.15s box-shadow}.feature-card:hover{transform:translateY(-3px);box-shadow:0 17px 40px rgba(19,48,67,.13)}.feature-card h3{margin:11px 0 6px;font-size:1.15rem}.feature-card p{margin:0;color:var(--muted);font-size:.92rem}.feature-icon{display:inline-grid;place-items:center;min-width:40px;height:40px;padding:0 8px;border-radius:12px;background:var(--navy2);color:var(--gold2);font-weight:900}.home-story{max-width:none;background:#dfeef2}.home-story>.section-heading,.home-story>.progress-grid{max-width:var(--content);margin-left:auto;margin-right:auto}.progress-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px}.progress-card{display:grid;grid-template-columns:48px 1fr;align-items:center;min-height:78px;border:1px solid #cbdce2;border-radius:13px;background:#fff;color:var(--ink);text-decoration:none;overflow:hidden}.progress-card span{display:grid;place-items:center;align-self:stretch;background:var(--sea);color:#fff;font-weight:900}.progress-card strong{padding:12px}.data-hubs{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px}.hub-card{background:#fff;border:1px solid var(--line);border-radius:16px;overflow:hidden;box-shadow:var(--shadow)}.hub-heading{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:15px 18px;background:var(--navy2);color:#fff}.hub-heading h2{margin:0;font-size:1.15rem}.hub-heading a{color:var(--gold2)}.chip-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr))}.chip-grid a{padding:12px;border-right:1px solid var(--line);border-bottom:1px solid var(--line);text-align:center;font-weight:700}.version-home{max-width:calc(var(--content) - 40px);margin:0 auto 50px;padding:32px;display:flex;align-items:center;justify-content:space-between;gap:30px;border:1px solid #d5c181;border-left:6px solid var(--gold);border-radius:16px;background:#fffaf0}
.guide-feature-grid,.data-card-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}.data-card{border:1px solid var(--line);border-radius:14px;overflow:hidden;background:#fff;box-shadow:0 8px 20px rgba(19,48,67,.05)}.data-card-head{padding:13px 16px;background:var(--navy2);color:#fff}.data-card-head h2{margin:0;font-size:1.08rem}.data-card dl{display:grid;grid-template-columns:1fr 1fr;margin:0}.data-card dl>div{display:grid;grid-template-columns:78px 1fr;border-right:1px solid var(--line);border-bottom:1px solid var(--line)}.data-card dl>div:nth-child(even){border-right:0}.data-card dt,.data-card dd{margin:0;padding:10px}.data-card dt{background:#eff4f7;font-weight:750}.plain-list{margin:0;padding-left:1.4em}.plain-list li{margin:.55em 0}.info-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}.info-panel{padding:20px;border:1px solid var(--line);border-radius:14px;background:#fff}.info-panel h2{margin-top:0}
.checklist-panel{border:1px solid var(--line);border-radius:15px;overflow:hidden}.checklist-head{display:flex;align-items:center;justify-content:space-between;gap:20px;padding:18px;background:var(--navy2);color:#fff}.checklist-head h2{margin:0;color:#fff;font-size:1.18rem}.checklist-head p{margin:4px 0 0;color:#dceaf0}.checklist-progress{color:var(--gold2);font-size:1.2rem;white-space:nowrap}.checklist-tools{display:flex;gap:7px;padding:10px;background:#f3f7f9;border-bottom:1px solid var(--line)}.checklist-tools button{border:1px solid #b8c8d2;border-radius:999px;background:#fff;padding:7px 11px;font:inherit;font-size:.85rem}.checklist-tools button.is-active{background:var(--sea);border-color:var(--sea);color:#fff}.checklist-list,.ship-parts-list{list-style:none;margin:0;padding:0;display:grid;grid-template-columns:repeat(2,minmax(0,1fr))}.checklist-list li,.ship-parts-list li{border-bottom:1px solid var(--line);border-right:1px solid var(--line)}.checklist-list li:nth-child(even),.ship-parts-list li:nth-child(even){border-right:0}.checklist-list label{display:grid;grid-template-columns:auto 46px 1fr;align-items:start;gap:8px;padding:11px 12px;cursor:pointer}.checklist-list input,.ship-parts-list input{width:18px;height:18px;margin-top:4px}.check-number{color:#087096;font-weight:850;font-variant-numeric:tabular-nums}.checklist-list input:checked~span,.ship-parts-list input:checked~span{text-decoration:line-through;color:#7c8995}.ship-parts-list label{display:flex;gap:12px;padding:13px;cursor:pointer}.ship-part-copy{display:grid}.ship-part-copy small{color:var(--muted)}.is-hidden{display:none!important}
.site-search label{display:block;font-weight:850;margin-bottom:6px}.site-search>div{display:flex;gap:8px}.site-search input{flex:1;min-height:48px;border:1px solid #aebdca;border-radius:10px;padding:10px 13px;font:inherit}.site-search button{border:0;border-radius:10px;background:var(--gold);color:#14293a;padding:10px 20px;font:inherit;font-weight:850}.search-results{display:grid;gap:12px;margin-top:22px}.search-result{display:block;padding:16px;border:1px solid var(--line);border-radius:12px;text-decoration:none;color:var(--ink);background:#fff}.search-result h2{margin:0 0 5px;font-size:1.12rem}.search-result p{margin:0;color:var(--muted)}
.site-footer{background:var(--deep);color:#d7e3e9}.footer-inner{max-width:var(--content);margin:auto;padding:34px 20px}.footer-inner nav{display:flex;flex-wrap:wrap;gap:15px}.footer-inner a{color:#fff}.footer-inner p{margin:14px 0 0}.copyright{color:#91a8b6}.back-to-top{position:fixed;right:18px;bottom:18px;width:50px;height:50px;border-radius:50%;border:1px solid #b4c2cc;background:#fff;color:var(--navy);box-shadow:var(--shadow);opacity:0;pointer-events:none;transition:.2s}.back-to-top.is-visible{opacity:1;pointer-events:auto}
.error-page{min-height:100vh;display:grid;place-items:center;padding:20px;background:var(--bg)}.error-card{max-width:680px;text-align:center;background:#fff;border:1px solid var(--line);border-radius:20px;padding:50px;box-shadow:var(--shadow)}.error-card>span{display:block;font-size:5rem;line-height:1;color:var(--gold);font-weight:900}
@media(max-width:960px){.global-nav{display:none;position:absolute;top:70px;left:0;right:0;margin:0;padding:12px 20px 18px;background:var(--navy);border-top:1px solid rgba(255,255,255,.15);flex-direction:column;align-items:stretch;gap:0}.global-nav.is-open{display:flex}.global-nav a{padding:11px 8px;border-bottom:1px solid rgba(255,255,255,.12)}.menu-button{display:block}.home-hero-inner{grid-template-columns:1fr 280px}.quick-grid,.progress-grid,.data-hubs{grid-template-columns:repeat(2,minmax(0,1fr))}.hero-mark img{width:180px}}
@media(max-width:700px){body{font-size:15.5px}.header-inner{height:64px;padding:0 14px}.site-brand span{font-size:1.02rem}.site-brand small{font-size:.7rem}.global-nav{top:64px}.page-shell{padding:0 10px 42px}.breadcrumbs{padding:10px 2px 8px}.page-hero{border-radius:12px;padding:22px 18px}.page-hero h1{font-size:1.6rem}.page-lead{font-size:.92rem}.context-nav{overflow-x:auto;flex-wrap:nowrap;padding:8px}.content-card{padding:15px 12px;border-radius:12px}.home-hero-inner{min-height:auto;padding:48px 18px 44px;display:block}.hero-copy h1{font-size:clamp(2.35rem,12vw,3.75rem)}.hero-mark{display:none}.home-section{padding:44px 12px}.quick-grid,.progress-grid,.data-hubs,.guide-feature-grid,.data-card-grid,.info-grid{grid-template-columns:1fr}.home-story{padding-left:12px;padding-right:12px}.version-home{margin:0 12px 36px;padding:24px;display:block}.version-home .button{margin-top:18px}.steps li{grid-template-columns:48px minmax(0,1fr)}.step-number{font-size:.82rem}.data-card dl{grid-template-columns:1fr}.data-card dl>div,.data-card dl>div:nth-child(even){border-right:0}.checklist-head{align-items:flex-start}.checklist-list,.ship-parts-list{grid-template-columns:1fr}.checklist-list li,.ship-parts-list li{border-right:0}.site-search>div{display:block}.site-search button{width:100%;margin-top:8px}.related-links{display:grid}.hero-actions{display:grid}.button{width:100%}}
@media print{.site-header,.context-nav,.related-card,.site-footer,.back-to-top,.checklist-tools{display:none!important}.page-shell{max-width:none;padding:0}.page-hero{color:#000;background:#fff;box-shadow:none;border:1px solid #ccc}.page-lead{color:#333}.content-card,.walkthrough-section{box-shadow:none}}