*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
img{max-width:100%;display:block}
a{text-decoration:none;color:inherit}
ul,ol{list-style:none}
body{-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility}
@media (prefers-reduced-motion: reduce){*{animation:none!important;transition:none!important;scroll-behavior:auto!important}}
:focus-visible{outline:3px solid var(--accent);outline-offset:2px}

:root{
  --bg:#f4f1ea;--ink:#1c2b2a;--accent:#e08a2b;--accent2:#c9701a;
  --deep:#123a37;--teal:#1f5c57;--soft:#e8f0ec;
  --line:#d7d0c1;--muted:#5c6a63;--foot-bg:#123a37;--foot-fg:#e9efe8;
  --ff-disp:'Zen Old Mincho',serif;--ff-body:'Zen Kaku Gothic New',sans-serif;
  --maxw:1060px;--radius:6px;
}
body{font-family:var(--ff-body);background:var(--bg);color:var(--ink);line-height:1.9;font-size:16px}
.shell{position:relative;padding-top:70px}

/* ===== header / nav ===== */
.ir-bar{position:fixed;top:0;left:0;right:0;height:70px;display:flex;align-items:center;gap:24px;padding:0 28px;background:var(--deep);z-index:80;box-shadow:0 1px 0 rgba(0,0,0,.15)}
.ir-bar .logo{font-family:var(--ff-disp);font-size:20px;font-weight:700;color:#fff;letter-spacing:.04em;display:flex;align-items:center;gap:9px}
.ir-bar .logo::before{content:"";width:12px;height:12px;background:var(--accent);border-radius:2px;transform:rotate(45deg);display:inline-block}
.ir-nav{margin-left:auto}
.ir-nav ul{display:flex;gap:4px}
.ir-nav a{display:flex;align-items:center;gap:7px;padding:9px 15px;border-radius:4px;color:rgba(255,255,255,.72);font-size:13.5px;font-weight:500;transition:.2s}
.ir-nav a:hover,.ir-nav li.is-active a{color:#fff;background:rgba(255,255,255,.10)}
.ir-nav li.is-active a{box-shadow:inset 0 -2px 0 var(--accent)}
.ir-i{font-size:15px;line-height:1;color:var(--accent)}
.ir-l{font-size:13.5px}

/* ===== home hero ===== */
.wg-hero{max-width:var(--maxw);margin:0 auto;padding:76px 28px 40px;position:relative}
.wg-hero .k{font-family:var(--ff-disp);color:var(--accent2);font-weight:700;letter-spacing:.16em;font-size:13px;margin-bottom:18px}
.wg-hero h1{font-family:var(--ff-disp);font-weight:700;font-size:clamp(29px,5.2vw,50px);line-height:1.5;margin-bottom:22px;letter-spacing:.01em}
.wg-hero p{color:var(--muted);max-width:60ch;line-height:2}
.wg-hero .hero-rule{width:64px;height:4px;background:var(--accent);margin-bottom:26px}

/* ===== home cards ===== */
.wg-grid{max-width:var(--maxw);margin:0 auto;padding:34px 28px 88px}
.wg-grid h2{font-family:var(--ff-disp);font-size:22px;margin-bottom:28px;padding-left:16px;border-left:5px solid var(--accent)}
.wgg{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.wgc{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:30px 24px;transition:.25s;position:relative;overflow:hidden}
.wgc::after{content:"";position:absolute;left:0;top:0;bottom:0;width:4px;background:var(--teal);transition:.25s}
.wgc:hover{transform:translateY(-4px);box-shadow:0 20px 40px -28px rgba(18,58,55,.55);border-color:var(--teal)}
.wgc:hover::after{width:6px;background:var(--accent)}
.wgc .tile{width:52px;height:52px;border-radius:8px;background:var(--soft);color:var(--teal);margin-bottom:16px;display:flex;align-items:center;justify-content:center;font-size:24px;border:1px solid var(--line)}
.wgc b{font-family:var(--ff-disp);font-size:17px;display:block;margin-bottom:6px}
.wgc span{font-size:13px;color:var(--muted)}

/* ===== subpage ===== */
.page-main{max-width:var(--maxw);margin:0 auto;padding:70px 28px 84px}
.page-head{margin-bottom:48px;padding-bottom:28px;border-bottom:1px solid var(--line)}
.page-head h1{font-family:var(--ff-disp);font-weight:700;font-size:clamp(27px,5vw,42px);line-height:1.45;letter-spacing:.01em}
.lead{color:var(--deep);font-size:17px;max-width:64ch;margin-top:18px;font-weight:500;background:var(--soft);border-left:5px solid var(--accent);padding:16px 20px;border-radius:0 var(--radius) var(--radius) 0}
.block{margin:0 0 50px}
.block h2{font-family:var(--ff-disp);font-weight:700;font-size:clamp(20px,3.2vw,28px);margin-bottom:20px;padding-left:16px;border-left:5px solid var(--teal)}
.block h3{font-family:var(--ff-disp);font-weight:700;font-size:clamp(17px,2.4vw,21px);margin:30px 0 14px;color:var(--teal)}
.block h3::before{content:"—　";color:var(--accent)}
.block p{margin-bottom:16px}
.block.has-img{display:grid;grid-template-columns:1.2fr .95fr;gap:40px;align-items:center}
.block.has-img h2{border:none;padding:0}
.block-fig img{border-radius:var(--radius);width:100%;aspect-ratio:4/3;object-fit:cover;box-shadow:0 18px 44px -26px rgba(18,58,55,.5)}
@media(max-width:760px){.block.has-img{grid-template-columns:1fr;gap:22px}}

/* table */
.tbl-wrap{overflow-x:auto;margin:8px 0 20px}
table.info{width:100%;border-collapse:collapse;font-size:14.5px;background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden}
table.info th,table.info td{padding:13px 16px;text-align:left;border-bottom:1px solid var(--line)}
table.info thead th{background:var(--deep);color:#fff;font-family:var(--ff-disp);font-weight:700;letter-spacing:.03em}
table.info tbody tr:last-child td{border-bottom:none}
table.info tbody tr:nth-child(even){background:var(--soft)}
table.info td:first-child{font-weight:700;color:var(--teal)}

/* ===== sitemap (list form) ===== */
.sitemap-list{border-top:2px solid var(--deep)}
.sitemap-list li{border-bottom:1px solid var(--line)}
.sitemap-list a{display:grid;grid-template-columns:auto 1fr;gap:6px 20px;align-items:start;padding:24px 8px;transition:.2s}
.sitemap-list a:hover{background:var(--soft);padding-left:16px}
.sitemap-list .sm-title{font-family:var(--ff-disp);font-weight:700;font-size:18px;color:var(--deep);grid-column:1;position:relative;padding-left:20px}
.sitemap-list .sm-title::before{content:"▸";position:absolute;left:0;color:var(--accent)}
.sitemap-list .sm-file{grid-column:1;font-size:12px;color:var(--muted);padding-left:20px}
.sitemap-list .sm-desc{grid-column:2;grid-row:1 / span 2;color:var(--muted);font-size:14.5px;line-height:1.8}
@media(max-width:640px){.sitemap-list a{grid-template-columns:1fr;gap:8px}.sitemap-list .sm-desc{grid-column:1;grid-row:auto;padding-left:20px}}

/* ===== footer ===== */
.site-footer{background:var(--foot-bg);color:var(--foot-fg);margin-top:80px;border-top:4px solid var(--accent)}
.site-footer ul{list-style:none}
.site-footer a{color:inherit;opacity:.82;transition:.2s}
.site-footer a:hover{opacity:1;color:var(--accent)}
.ft-in{max-width:var(--maxw);margin:0 auto;padding:58px 28px 30px}
.ft-name{font-family:var(--ff-disp);font-weight:700;font-size:26px;margin-bottom:10px;display:flex;align-items:center;gap:10px}
.ft-name::before{content:"";width:14px;height:14px;background:var(--accent);border-radius:2px;transform:rotate(45deg);display:inline-block}
.ft-tag{opacity:.72;font-size:14px;margin-bottom:26px}
.ft-nav ul{display:flex;flex-wrap:wrap;gap:10px 26px;font-size:14px;padding-top:24px;border-top:1px solid rgba(255,255,255,.14);margin-bottom:18px}
.ft-copy{font-size:12px;opacity:.55}

/* ===== to top / reveal / burger ===== */
.to-top{position:fixed;right:20px;bottom:20px;width:46px;height:46px;border-radius:6px;background:var(--accent);color:#fff;display:flex;align-items:center;justify-content:center;font-size:20px;opacity:0;pointer-events:none;transform:translateY(12px);transition:.3s;z-index:60;box-shadow:0 8px 20px -8px rgba(0,0,0,.5)}
.to-top.show{opacity:1;pointer-events:auto;transform:none}
.reveal{opacity:0;transform:translateY(26px);transition:opacity .7s ease,transform .7s ease}
.reveal.in{opacity:1;transform:none}
.burger{display:none;width:42px;height:42px;background:none;border:none;cursor:pointer;flex-direction:column;justify-content:center;gap:5px;padding:8px;margin-left:auto}
.burger span{display:block;height:2px;background:#fff;transition:.3s}
.burger[aria-expanded="true"] span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.burger[aria-expanded="true"] span:nth-child(2){opacity:0}
.burger[aria-expanded="true"] span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}
.drawer{display:none}

@media(max-width:860px){
  .ir-nav{display:none}
  .burger{display:flex}
  .drawer.open{display:block;position:absolute;top:70px;left:0;right:0;background:var(--deep)}
  .drawer.open ul{flex-direction:column;padding:8px 28px 18px}
  .drawer.open li{padding:11px 0;border-top:1px solid rgba(255,255,255,.12)}
  .drawer.open a{color:rgba(255,255,255,.85)}
  .drawer.open a.is-active{color:var(--accent)}
  .wgg{grid-template-columns:1fr 1fr}
}
@media(max-width:560px){.wgg{grid-template-columns:1fr}}

/* リンク集 */
.link-list{list-style:none;margin:0;padding:0;display:grid;gap:16px}
.link-list li{background:#fff;border:1px solid var(--line);border-radius:var(--radius);transition:.25s}
.link-list li:hover{border-color:var(--teal);box-shadow:0 16px 36px -26px rgba(18,58,55,.5)}
.link-list a{display:block;padding:22px 24px;text-decoration:none;color:inherit}
.link-list .lk-t{font-family:var(--ff-disp);font-weight:700;font-size:17px;color:var(--teal)}
.link-list .lk-t::after{content:"↗";font-size:13px;margin-left:8px;color:var(--accent)}
.link-list .lk-d{font-size:14px;color:var(--muted);margin-top:6px}
.link-list .lk-u{font-size:12px;color:var(--muted);margin-top:6px;word-break:break-all}