:root{
  --main:#009490;--main-soft:#dff1f0;--main-deep:#007e7a;
  --accent:#ea6e8e;--accent-soft:#fbe5eb;
  --bg1:#f4f6f8;
  --ink:#1a232e;
  --gray:#5a6573;--line:#e1e6ea;
  /* SDGs公式色 */
  --sdg1:#E5243B;--sdg3:#4C9F38;--sdg5:#FF3A21;--sdg8:#A21942;
  --sdg9:#FD6925;--sdg10:#DD1367;--sdg11:#FD9D24;--sdg12:#BF8B2E
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:"Hiragino Kaku Gothic ProN","Yu Gothic",sans-serif;color:var(--ink);background:#ffffff;line-height:1.9;font-feature-settings:"palt";-webkit-font-smoothing:antialiased}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}

.nav{position:sticky;top:0;background:#ffffff;z-index:100;transition:box-shadow .3s,border-color .3s;border-bottom:1px solid transparent}
.nav.scrolled{box-shadow:0 4px 18px -8px rgba(20,40,40,.18);border-bottom-color:var(--line)}
.nav-in{max-width:1280px;margin:0 auto;padding:18px 32px;display:flex;justify-content:space-between;align-items:center;gap:32px}
.logo img{height:52px}
.nav-r{display:flex;align-items:center;gap:36px;margin-left:auto}
.menu{display:flex;gap:36px;font-size:14px;font-weight:600;letter-spacing:.03em}
.menu a{position:relative;padding:6px 0 8px}
.menu a::before{content:"";position:absolute;left:0;right:0;bottom:0;height:1.5px;background:var(--main);opacity:.45}
.menu a:hover{color:var(--main)}
.menu a.current{color:var(--main)}
.menu a.current::before{opacity:1}
.cta-nav{background:var(--main);color:#fff;padding:13px 28px;border-radius:999px;font-size:12.5px;font-weight:700;box-shadow:0 6px 16px -8px rgba(0,148,144,.45)}

.crumb{max-width:1280px;margin:0 auto;padding:18px 32px 0;font-size:11.5px;color:var(--gray)}
.crumb span{margin:0 8px;opacity:.5}

.page-strip{padding:24px 32px 14px;background:#fff;text-align:center}
.page-strip p.tag{font-size:12px;color:var(--accent);letter-spacing:.2em;font-weight:800;margin-bottom:12px}
.page-strip h1{font-size:clamp(28px,3.6vw,40px);font-weight:900;letter-spacing:.01em}
.page-strip h1 em{font-style:normal;color:var(--main)}

.p-wrap{max-width:960px;margin:0 auto;padding:12px 32px 80px}

.p-sec{margin-top:48px}
.p-sec:first-child{margin-top:0}
.p-sec-head{margin-bottom:18px}
.p-sec-head h2{font-size:20px;font-weight:800;color:var(--main);padding-bottom:10px;border-bottom:2px solid var(--main);letter-spacing:.02em}
.p-sec-head.no-underline h2{border-bottom:none;padding-bottom:0}
.p-sec-head h2 .num{display:inline-block;width:30px;height:30px;border-radius:50%;background:var(--main);color:#fff;text-align:center;line-height:30px;font-size:14px;font-weight:900;margin-right:10px;vertical-align:middle;font-family:"Helvetica Neue",Helvetica,Arial,sans-serif}

/* SDGs宣言 */
.sdg-decl{background:linear-gradient(135deg,var(--main-soft) 0%,#e8f0fa 100%);border-left:4px solid var(--main);padding:28px 32px}
.sdg-decl p{font-size:15px;line-height:2;color:var(--ink);font-weight:600}
.sdg-icons{display:flex;flex-wrap:wrap;gap:10px;margin-top:22px}
.sdg-badge{width:54px;height:54px;border-radius:8px;color:#fff;display:flex;align-items:center;justify-content:center;font-family:"Helvetica Neue",Helvetica,Arial,sans-serif;font-weight:900;font-size:15px;letter-spacing:0;box-shadow:0 4px 10px -4px rgba(0,0,0,.18);line-height:1;padding:2px}
.sdg-badge.s1{background:var(--sdg1)}
.sdg-badge.s3{background:var(--sdg3)}
.sdg-badge.s5{background:var(--sdg5)}
.sdg-badge.s8{background:var(--sdg8)}
.sdg-badge.s9{background:var(--sdg9)}
.sdg-badge.s10{background:var(--sdg10)}
.sdg-badge.s11{background:var(--sdg11)}
.sdg-badge.s12{background:var(--sdg12)}

/* 取り組みカード */
.action-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px;margin-top:8px}
@media(max-width:840px){.action-grid{grid-template-columns:1fr}}
.action-card{background:#fff;border:1px solid var(--line);padding:24px 26px;display:flex;flex-direction:column;gap:14px}
.action-card-head{display:flex;justify-content:space-between;align-items:flex-start;gap:14px}
.action-card h3{font-size:15.5px;font-weight:800;color:var(--ink);line-height:1.5;flex:1}
.action-card .sdg-mini{display:flex;gap:4px;flex-wrap:wrap}
.action-card .sdg-mini .sdg-badge{width:34px;height:34px;font-size:12px;border-radius:5px}
.action-card p{font-size:13px;color:var(--ink);line-height:1.9}
.action-card .links{font-size:12px;color:var(--gray);line-height:2}
.action-card .links a{color:var(--main);border-bottom:1px solid var(--main);padding-bottom:1px}
.action-card .links a:hover{color:var(--main-deep)}
.eco-policy{background:transparent;border:none;padding:0;line-height:1.95;font-size:13.5px;color:var(--ink)}
.eco-policy p{margin-bottom:14px}
.eco-policy h3{font-size:14px;font-weight:800;color:var(--main-deep);margin:18px 0 8px}
.eco-policy ul{list-style:none;padding-left:0;margin:0}
.eco-policy ul li{position:relative;padding:5px 0 5px 22px;font-size:13px;line-height:1.85}
.eco-policy ul li::before{content:"";position:absolute;left:2px;top:14px;width:8px;height:8px;background:#fff;border:2px solid var(--main);border-radius:50%}
.eco-report{background:transparent;border:none;padding:0}
.eco-report .pdf-link{display:inline-flex;align-items:baseline;gap:8px;font-size:15px;font-weight:700;color:var(--ink);border-bottom:none;padding:0}
.eco-report .pdf-link::before{content:"○";color:var(--main);font-weight:900}
.eco-report .pdf-link:hover{color:var(--main)}

/* 地元スポーツチーム支援 */
.sports-support{display:grid;grid-template-columns:300px 1fr;gap:32px;background:transparent;border:none;padding:0;align-items:center}
@media(max-width:840px){.sports-support{grid-template-columns:1fr;gap:20px}}
.sports-logo{background:#fff;padding:8px;display:flex;align-items:center;justify-content:center}
.sports-logo img{width:100%;height:auto;max-height:120px;object-fit:contain;display:block}
.sports-text{font-size:13.5px;color:var(--ink);line-height:2}
.sports-text p{margin:0}

/* ちばSDGsパートナー */
.partner-block{display:grid;grid-template-columns:240px 1fr;gap:32px;background:transparent;border:none;padding:0;align-items:start}
@media(max-width:840px){.partner-block{grid-template-columns:1fr}}
.partner-cert{background:#fff;border:1px solid var(--line);padding:8px;display:flex;align-items:center;justify-content:center}
.partner-cert img{width:100%;height:auto;display:block}

.partner-text{font-size:13.5px;color:var(--ink);line-height:2}
.partner-text p + p{margin-top:14px}
.partner-text b{color:var(--main-deep)}
.partner-links{margin-top:18px;padding-top:18px;border-top:1px dashed var(--line);font-size:12.5px;line-height:2}
.partner-links a{color:var(--main);border-bottom:1px solid var(--main);padding-bottom:1px}

footer{background:#ffffff;color:var(--ink);padding:60px 32px 28px;border-top:4px solid var(--main);position:relative;margin-top:60px}
footer::before{content:"";position:absolute;left:0;right:0;top:0;height:1px;background:linear-gradient(90deg,var(--main),var(--accent));opacity:.85}
.f-in{max-width:1280px;margin:0 auto 36px;display:grid;grid-template-columns:1.2fr 2fr;gap:64px;align-items:start}
.f-l img{height:36px;margin-bottom:18px}
.f-d{font-size:12.5px;color:var(--gray);line-height:1.85}
.f-links-wrap{display:flex;flex-direction:column;gap:18px}
.f-links-label{font-size:10.5px;color:var(--main);font-weight:800;letter-spacing:.2em}
.f-links{display:flex;flex-wrap:wrap;gap:14px 28px}
.f-links a{font-size:12.5px;color:var(--ink);font-weight:600}
.f-links a:hover{color:var(--main)}
.f-links a.current{color:var(--main)}
.cp{max-width:1280px;margin:0 auto;border-top:1px solid var(--line);padding-top:20px;text-align:center;font-size:10.5px;color:var(--gray);letter-spacing:.08em}

.menu-toggle{display:none}
.to-top{position:fixed;right:24px;bottom:24px;width:48px;height:48px;border-radius:50%;background:var(--main);color:#fff;border:none;cursor:pointer;display:flex;align-items:center;justify-content:center;box-shadow:0 8px 20px -6px rgba(0,148,144,.4);transition:transform .25s,background .25s;z-index:200;font-size:0}
.to-top:hover{background:var(--main-deep);transform:translateY(-2px)}
.to-top svg{width:18px;height:18px;stroke:#fff;stroke-width:2.5;fill:none;stroke-linecap:round;stroke-linejoin:round}

@media(max-width:840px){
  .to-top{display:none!important}
  .p-wrap{padding:0 24px 60px}
  .nav-in{flex-wrap:wrap}
  .menu-toggle{display:flex;flex-direction:column;justify-content:center;gap:5px;width:32px;height:32px;background:none;border:none;cursor:pointer;padding:0;margin-left:auto}
  .menu-toggle span{display:block;width:24px;height:2px;background:var(--ink);transition:transform .3s,opacity .3s}
  .menu-toggle[aria-expanded="true"] span:nth-child(1){transform:translateY(7px) rotate(45deg)}
  .menu-toggle[aria-expanded="true"] span:nth-child(2){opacity:0}
  .menu-toggle[aria-expanded="true"] span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}
  .nav-r{display:none;width:100%;flex-direction:column;gap:0;align-items:stretch;padding:12px 0 4px;border-top:1px solid var(--line);margin-top:14px;margin-left:0}
  .nav-r.open{display:flex}
  .menu{display:flex;flex-direction:column;gap:0;width:100%}
  .menu a{padding:14px 0;border-bottom:1px solid var(--line)}
  .menu a::before{display:none}
  .cta-nav{margin-top:12px;text-align:center;padding:13px 20px;align-self:stretch}
  .f-in{grid-template-columns:1fr;gap:32px}
}
.menu-top-mobile{display:none}
@media(max-width:840px){.menu-top-mobile{display:block;color:var(--main)!important;font-weight:800;background:var(--main-soft,#dff1f0);padding:14px 16px!important;margin:-12px -12px 4px;border-radius:4px}.menu-top-mobile::before{display:none!important}}