:root{--theme:#0B3D91;--ink:#172033;--muted:#68738a;--line:#e5e9f0;--soft:#f5f7fb;--white:#fff;--accent:#d41468}
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{margin:0;color:var(--ink);font-family:-apple-system,BlinkMacSystemFont,"Noto Sans JP","Hiragino Kaku Gothic ProN",Meiryo,sans-serif;background:#fff;line-height:1.7}
    a{color:inherit;text-decoration:none}
    img{max-width:100%;display:block}
    .container{width:min(1180px,calc(100% - 40px));margin:auto}
    .topbar{background:#101827;color:#dce4f2;font-size:12px}
    .topbar-inner{height:34px;display:flex;align-items:center;justify-content:space-between}
    .topbar-contact{display:flex;gap:22px}
    .topbar a:hover{color:#fff}
    .header{background:#fff;border-bottom:1px solid var(--line);position:relative;z-index:20}
    .header-inner{height:78px;display:flex;align-items:center;gap:28px}
    .logo{display:flex;align-items:center;gap:10px;font-weight:800;white-space:nowrap;font-size:18px;color:var(--theme)}
    .logo img{width:34px;height:34px;object-fit:contain}
    .main-nav{flex:1}
    .nav-list{display:flex;align-items:center;justify-content:center;gap:3px;list-style:none;margin:0;padding:0}
    .nav-item{position:relative}
    .nav-link{display:flex;align-items:center;min-height:78px;padding:0 13px;font-size:14px;font-weight:700;cursor:pointer;white-space:nowrap}
    .nav-item.has-panel>.nav-link:after{content:"⌄";font-size:12px;margin-left:5px;color:var(--muted)}
    .nav-link:hover,.nav-link:focus{color:var(--theme)}
    .dropdown-panel,.mega-menu{position:absolute;top:100%;left:50%;transform:translateX(-50%);background:#fff;border:1px solid var(--line);box-shadow:0 18px 42px #1720331c;border-radius:0 0 14px 14px;padding:22px;opacity:0;visibility:hidden;pointer-events:none;transition:.2s;z-index:30}
    .dropdown-panel{width:300px}
    .mega-menu{width:760px}
    .nav-item.has-panel:after{content:"";position:absolute;top:100%;left:0;width:100%;height:12px}
    .nav-item:hover>.dropdown-panel,.nav-item:focus-within>.dropdown-panel,.nav-item:hover>.mega-menu,.nav-item:focus-within>.mega-menu{opacity:1;visibility:visible;pointer-events:auto}
    .dropdown-list{display:grid;gap:8px}
    .dropdown-list a{padding:8px;border-bottom:1px solid var(--line);font-size:13px}
    .panel-entry,.mega-heading{display:flex;justify-content:space-between;align-items:center;margin-top:15px;color:var(--theme);font-size:13px;font-weight:700}
    .mega-heading{margin:0 0 15px;color:var(--ink)}
    .mega-heading a{color:var(--theme)}
    .mega-heading span{font-size:12px;color:var(--muted);font-weight:500}
    .mega-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:10px}
    .mega-card{display:flex;gap:10px;padding:10px;border:1px solid var(--line);border-radius:10px;min-width:0}
    .mega-card:hover{border-color:var(--theme);background:#f7faff}
    .mega-card>img{width:52px;height:52px;border-radius:8px;object-fit:cover;background:var(--soft);flex:none}
    .mega-card span{min-width:0}
    .mega-card strong{font-size:13px;display:block;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
    .mega-card p,.mega-card small{display:block;color:var(--muted);font-size:11px;margin:2px 0;line-height:1.45}
    .mega-categories{display:flex;flex-wrap:wrap;gap:7px;margin-bottom:15px}
    .mega-categories a{padding:4px 10px;background:var(--soft);border-radius:99px;font-size:12px}
    .header-btns{display:flex;align-items:center;gap:12px;font-size:13px;white-space:nowrap}
    .header-btns>a{background:var(--theme);color:#fff;padding:9px 14px;border-radius:7px;font-weight:700}
    .hamburger{display:none;border:0;background:none;padding:7px;cursor:pointer}
    .hamburger span{display:block;width:24px;height:2px;background:var(--ink);margin:5px 0;transition:.2s}
    .hamburger.active span:nth-child(1){transform:translateY(7px) rotate(45deg)}
    .hamburger.active span:nth-child(2){opacity:0}
    .hamburger.active span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}
    .drawer-overlay{display:none}
    .mobile-drawer{display:none}
    .download-page-main{background:linear-gradient(180deg,#f6f8fc 0,#fff 55%);padding-bottom:90px}
    .page-intro{text-align:center;padding:76px 20px 48px}
    .eyebrow{color:var(--accent);font-size:12px;font-weight:800;letter-spacing:.16em}
    .page-intro h1{font-size:clamp(30px,5vw,54px);line-height:1.2;margin:12px 0 15px;letter-spacing:-.04em}
    .page-intro p{max-width:650px;margin:auto;color:var(--muted);font-size:15px}
    .download-steps{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;margin-bottom:62px}
    .step-card{background:#fff;border:1px solid var(--line);border-radius:18px;padding:28px;box-shadow:0 12px 28px #18233b08}
    .step-no{width:38px;height:38px;border-radius:50%;display:grid;place-items:center;background:#e9f0ff;color:var(--theme);font-weight:800;margin-bottom:18px}
    .step-card h2{font-size:19px;margin:0 0 8px}
    .step-card p{color:var(--muted);font-size:14px;margin:0}
    .download-panel{display:grid;grid-template-columns:1.1fr .9fr;gap:22px;align-items:stretch}
    .download-box,.notice-box{border-radius:20px;padding:32px;background:#fff;border:1px solid var(--line)}
    .download-box{background:var(--theme);color:#fff}
    .download-box h2,.notice-box h2{margin:0 0 10px;font-size:24px}
    .download-box p{color:#dce8ff;font-size:14px}
    .download-actions{display:flex;flex-wrap:wrap;gap:10px;margin-top:22px}
    .button{display:inline-flex;align-items:center;justify-content:center;border-radius:8px;padding:11px 18px;font-weight:800;font-size:14px}
    .button-light{background:#fff;color:var(--theme)}
    .button-outline{border:1px solid #ffffff66;color:#fff}
    .notice-box p,.notice-box li{color:var(--muted);font-size:14px}
    .notice-box ul{padding-left:20px;margin-bottom:0}
    .faq{margin-top:22px;background:#fff;border:1px solid var(--line);border-radius:18px;padding:26px}
    .faq h2{margin:0 0 16px;font-size:22px}
    .faq details{border-top:1px solid var(--line);padding:14px 0}
    .faq summary{cursor:pointer;font-weight:700}
    .faq p{color:var(--muted);font-size:14px;margin:10px 0 0}
    .footer{background:#101827;color:#d9e0ec;padding:58px 0 22px}
    .footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:38px}
    .footer .logo{color:#fff}
    .footer-brand p{color:#9da8bb;font-size:13px;max-width:310px}
    .footer h2{font-size:14px;color:#fff;margin:4px 0 14px}
    .footer-links,.footer-contact{display:grid;gap:8px}
    .footer-links a,.footer-contact a{font-size:13px;color:#aeb9ca}
    .footer-links a:hover,.footer-contact a:hover{color:#fff}
    .footer-social{font-size:13px;color:#aeb9ca}
    .footer-bottom{display:flex;justify-content:space-between;gap:20px;border-top:1px solid #ffffff18;margin-top:42px;padding-top:18px;color:#8995aa;font-size:12px}
    @media(max-width:1050px){
      .main-nav{display:none}
      .hamburger{display:block}
      .mobile-drawer{display:block;position:fixed;right:0;top:0;width:min(390px,90vw);height:100vh;background:#fff;z-index:50;transform:translateX(105%);transition:.25s;overflow:auto;box-shadow:-18px 0 40px #0002}
      .mobile-drawer.open{transform:translateX(0)}
      .drawer-overlay{display:block;position:fixed;inset:0;background:#10182780;z-index:40;opacity:0;visibility:hidden;transition:.25s}
      .drawer-overlay.open{opacity:1;visibility:visible}
      .drawer-head{height:78px;display:flex;align-items:center;gap:15px;padding:0 22px;border-bottom:1px solid var(--line);font-weight:800;color:var(--theme)}
      .drawer-head a{margin-left:auto;background:var(--theme);color:#fff;padding:7px 11px;border-radius:6px;font-size:12px}
      .drawer-close{font-size:28px;border:0;background:none;color:var(--ink);cursor:pointer}
      .drawer-menu{padding:14px 22px}
      .drawer-link,.drawer-toggle{display:block;width:100%;padding:14px 0;border:0;border-bottom:1px solid var(--line);background:none;text-align:left;font:inherit;font-weight:700;cursor:pointer}
      .drawer-toggle:after{content:"＋";float:right;color:var(--muted)}
      .drawer-toggle.active:after{content:"−"}
      .drawer-submenu{display:none;padding:4px 0 8px 14px}
      .drawer-submenu.open{display:grid}
      .drawer-submenu a{padding:8px 0;color:var(--muted);font-size:13px}
    }
    @media(max-width:700px){
      .container{width:min(100% - 28px,1180px)}
      .topbar-inner{height:auto;min-height:34px;padding:7px 0;display:block}
      .topbar-contact{gap:12px;margin-top:2px}
      .header-inner{height:68px;gap:12px}
      .header-btns{margin-left:auto;gap:7px}
      .header-btns>span{display:none}
      .header-btns>a{padding:8px 9px;font-size:11px}
      .page-intro{padding:54px 8px 35px}
      .download-steps,.download-panel{grid-template-columns:1fr}
      .step-card{padding:23px}
      .download-box,.notice-box{padding:25px}
      .footer-grid{grid-template-columns:1fr 1fr;gap:26px}
      .footer-brand{grid-column:1/-1}
      .footer-bottom{display:block}
      .footer-bottom span{display:block;margin-top:5px}
    }