*{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:#f4f7f5;--ink:#16302b;--accent:#e08a2c;--accent2:#c46f16;
  --brand:#0f5f52;--brand-d:#0b463c;--soft:#e7efec;
  --line:#d3e2dc;--muted:#4e6560;--foot-bg:#0b463c;--foot-fg:#dcece7;
  --ff-disp:'Zen Maru Gothic',sans-serif;--ff-body:'Noto Sans JP',sans-serif;
  --maxw:1020px;--radius:6px;
}

body{font-family:var(--ff-body);background:var(--bg);color:var(--ink);line-height:1.9;font-size:16px}
.shell{position:relative}

/* ===== header: flat top bar with underline nav ===== */
.tp-wrap{position:sticky;top:0;left:0;right:0;z-index:80;background:rgba(244,247,245,.94);backdrop-filter:blur(8px);border-bottom:1px solid var(--line)}
.tp{max-width:var(--maxw);margin:0 auto;display:flex;align-items:center;justify-content:space-between;gap:24px;padding:14px 24px}
.tp .logo{font-family:var(--ff-disp);font-weight:700;font-size:20px;color:var(--brand);display:flex;align-items:center;gap:9px}
.tp .logo::before{content:"";width:14px;height:14px;border-radius:3px;background:var(--accent);display:inline-block;transform:rotate(45deg)}
.tp-nav ul{display:flex;gap:6px}
.tp-nav a{position:relative;display:block;padding:8px 14px;font-size:14px;font-weight:500;color:var(--muted);transition:.2s}
.tp-nav a::after{content:"";position:absolute;left:14px;right:14px;bottom:2px;height:2px;background:var(--accent);transform:scaleX(0);transform-origin:left;transition:.25s}
.tp-nav a:hover{color:var(--brand)}
.tp-nav a:hover::after{transform:scaleX(1)}
.tp-nav a.is-active{color:var(--brand);font-weight:700}
.tp-nav a.is-active::after{transform:scaleX(1)}
.shell{padding-top:0}

/* ===== home hero ===== */
.sp-hero{background:linear-gradient(180deg,var(--soft),transparent)}
.sp-hero .hero-in{max-width:var(--maxw);margin:0 auto;padding:64px 24px 44px}
.sp-hero .k{color:var(--accent2);font-weight:700;letter-spacing:.14em;font-size:12px;margin-bottom:16px;font-family:var(--ff-disp)}
.sp-hero h1{font-family:var(--ff-disp);font-weight:700;font-size:clamp(27px,5vw,44px);line-height:1.5;margin-bottom:20px;color:var(--brand-d)}
.sp-hero p{color:var(--muted);max-width:58ch;line-height:1.95}
.sp-hero .hero-fig{max-width:var(--maxw);margin:0 auto;padding:0 24px}
.sp-hero .hero-fig img{width:100%;height:clamp(200px,34vw,340px);object-fit:cover;border-radius:var(--radius);border:1px solid var(--line)}

/* ===== home flow ===== */
.sp-flow{max-width:var(--maxw);margin:0 auto;padding:56px 24px 30px}
.sp-flow .sec-h{text-align:center;margin-bottom:34px}
.sp-flow .sec-h .en{font-family:var(--ff-disp);color:var(--accent);letter-spacing:.2em;font-size:12px;display:block;margin-bottom:8px}
.sp-flow h2{font-family:var(--ff-disp);font-weight:700;font-size:clamp(22px,3.6vw,30px);color:var(--brand-d)}
.sp-cards{display:grid;grid-template-columns:repeat(5,1fr);gap:14px}
.sp-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:26px 18px;position:relative;overflow:hidden;transition:.25s}
.sp-card::before{content:"";position:absolute;top:0;left:0;width:100%;height:4px;background:var(--brand)}
.sp-card:hover{transform:translateY(-4px);box-shadow:0 16px 34px -22px rgba(15,95,82,.55)}
.sp-card .n{font-family:var(--ff-disp);font-weight:700;font-size:15px;color:var(--accent);margin-bottom:10px}
.sp-card h3{font-family:var(--ff-disp);font-weight:700;font-size:15.5px;margin-bottom:9px;line-height:1.5;color:var(--brand-d)}
.sp-card p{color:var(--muted);font-size:13px;line-height:1.75}
.sp-card a.more{display:inline-block;margin-top:12px;font-size:12px;font-weight:700;color:var(--accent2)}
.sp-card a.more::after{content:" →"}
@media(max-width:860px){.sp-cards{grid-template-columns:repeat(2,1fr)}}
@media(max-width:480px){.sp-cards{grid-template-columns:1fr}}

.sp-close{max-width:var(--maxw);margin:0 auto;padding:20px 24px 80px}
.sp-close .box{background:var(--brand);color:#fff;border-radius:var(--radius);padding:34px 30px;text-align:center}
.sp-close .box h2{font-family:var(--ff-disp);font-weight:700;font-size:clamp(19px,3vw,24px);margin-bottom:12px}
.sp-close .box p{opacity:.9;max-width:56ch;margin:0 auto;font-size:15px}

/* ===== inner pages ===== */
.page-main{max-width:var(--maxw);margin:0 auto;padding:56px 24px 80px}
.page-head{margin-bottom:40px;padding-left:20px;border-left:5px solid var(--accent)}
.eyebrow{font-family:var(--ff-disp);letter-spacing:.22em;font-size:11px;color:var(--accent2);text-transform:uppercase;margin-bottom:10px}
.page-head h1{font-family:var(--ff-disp);font-weight:700;font-size:clamp(25px,4.6vw,40px);line-height:1.45;color:var(--brand-d);margin-bottom:14px}
.lead{color:var(--muted);font-size:16px;max-width:64ch}

.block{margin:0 0 46px}
.block h2{font-family:var(--ff-disp);font-weight:700;font-size:clamp(19px,3vw,26px);color:var(--brand-d);margin-bottom:16px;position:relative;padding-left:16px}
.block h2::before{content:"";position:absolute;left:0;top:.15em;bottom:.15em;width:5px;border-radius:3px;background:var(--accent)}
.block h3{font-family:var(--ff-disp);font-weight:700;font-size:17px;color:var(--brand);margin:26px 0 12px;padding-bottom:8px;border-bottom:1px dashed var(--line)}
.block p{margin-bottom:15px}
.block.has-img{display:grid;grid-template-columns:1.2fr .95fr;gap:36px;align-items:center}
.block-fig img{border-radius:var(--radius);width:100%;aspect-ratio:4/3;object-fit:cover;border:1px solid var(--line);box-shadow:0 18px 40px -26px rgba(11,70,60,.5)}
@media(max-width:760px){.block.has-img{grid-template-columns:1fr;gap:20px}}

.tip{background:var(--soft);border-left:4px solid var(--brand);border-radius:var(--radius);padding:16px 20px;margin:20px 0;font-size:14.5px;color:var(--brand-d)}
.tip strong{color:var(--accent2)}

/* page nav (prev/next) */
.page-nav{max-width:var(--maxw);margin:0 auto;padding:0 24px 70px;display:flex;justify-content:space-between;gap:14px;flex-wrap:wrap}
.page-nav a{flex:1;min-width:220px;background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:16px 20px;transition:.2s}
.page-nav a:hover{border-color:var(--accent);transform:translateY(-2px)}
.page-nav small{display:block;font-size:11px;color:var(--muted);font-family:var(--ff-disp);letter-spacing:.1em;margin-bottom:4px}
.page-nav span{font-weight:700;color:var(--brand-d);font-size:14.5px}
.page-nav .nx{text-align:right}

/* ===== sitemap (list format) ===== */
.sitemap-page .page-head{margin-bottom:32px}
.sitemap-list{border-top:1px solid var(--line)}
.sitemap-list li{border-bottom:1px solid var(--line)}
.sitemap-list a{display:grid;grid-template-columns:auto 1fr;gap:4px 18px;align-items:baseline;padding:20px 8px 20px 18px;position:relative;transition:.2s}
.sitemap-list a::before{content:"";position:absolute;left:0;top:0;bottom:0;width:4px;background:var(--accent);transform:scaleY(0);transform-origin:top;transition:.25s}
.sitemap-list a:hover{background:var(--soft)}
.sitemap-list a:hover::before{transform:scaleY(1)}
.sitemap-list .t{font-family:var(--ff-disp);font-weight:700;font-size:16.5px;color:var(--brand-d);grid-column:1}
.sitemap-list .d{color:var(--muted);font-size:13.5px;line-height:1.7;grid-column:2}
@media(max-width:600px){.sitemap-list a{grid-template-columns:1fr}.sitemap-list .d{grid-column:1}}

/* ===== footer ===== */
.site-footer{background:var(--foot-bg);color:var(--foot-fg);margin-top:20px}
.site-footer ul{list-style:none}
.site-footer a{color:inherit;opacity:.82;transition:.2s}
.site-footer a:hover{opacity:1;color:var(--accent)}
.site-footer .ft-name{font-family:var(--ff-disp);font-weight:700;display:flex;align-items:center;gap:8px}
.site-footer .ft-name::before{content:"";width:12px;height:12px;background:var(--accent);transform:rotate(45deg);border-radius:2px}
.site-footer .ft-tag{opacity:.7;font-size:14px}
.ft-columns .ft-in{max-width:var(--maxw);margin:0 auto;padding:52px 24px 26px;display:grid;grid-template-columns:1.6fr 1fr;gap:34px}
.ft-columns .ft-name{font-size:20px;margin-bottom:10px}
.ft-columns .ft-nav ul{display:grid;grid-template-columns:1fr 1fr;gap:11px 20px;font-size:14px}
.ft-columns .ft-copy{text-align:center;padding:16px;border-top:1px solid rgba(255,255,255,.12);font-size:12px;opacity:.6}
@media(max-width:760px){.ft-columns .ft-in{grid-template-columns:1fr;gap:22px}}

.to-top{position:fixed;right:20px;bottom:20px;width:46px;height:46px;border-radius:8px;background:var(--brand);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(24px);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;color:var(--brand)}
.burger span{display:block;height:2px;background:currentColor;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:820px){
  .tp-nav{display:none}.burger{display:flex}
  .drawer.open{display:block;position:fixed;top:63px;left:16px;right:16px;background:#fff;border:1px solid var(--line);border-radius:10px;box-shadow:0 20px 40px -20px rgba(0,0,0,.3);z-index:90}
  .drawer.open ul{flex-direction:column;padding:6px 16px}
  .drawer.open li{border-top:1px solid var(--line)}
  .drawer.open li:first-child{border-top:none}
  .drawer.open a{display:block;padding:12px 4px;font-size:15px;font-weight:500;color:var(--muted)}
  .drawer.open a.is-active{color:var(--brand);font-weight:700}
}