:root{--orange:#ea580c;--orange-soft:#fff1e8;--orange-hover:#c2410c;--ink:#1a1a1a;--ink-2:#3d3d3d;--ink-3:#6b6b6b;--ink-4:#9a9a9a;--line:#ededed;--line-2:#e5e5e5;--bg:#fff;--bg-2:#fafaf9;--bg-3:#f5f4f2;--radius-s:8px;--radius-m:14px;--radius-l:22px;--font-base:"Noto Sans JP", -apple-system, BlinkMacSystemFont, "Hiragino Kaku Gothic ProN", sans-serif;--font-alt:"Zen Kaku Gothic New", "Noto Sans JP", sans-serif;--font-serif:"Noto Serif JP", serif;--fs-scale:1;--maxw:1120px}*{box-sizing:border-box}html,body{margin:0;padding:0}body{font-family:var(--font-base);color:var(--ink);background:var(--bg);font-size:calc(16px * var(--fs-scale));-webkit-font-smoothing:antialiased;font-feature-settings:"palt";line-height:1.75}a{color:inherit;text-decoration:none}a:hover{color:var(--orange)}button{font-family:inherit;font-size:inherit;cursor:pointer}img{max-width:100%;display:block}.container{max-width:var(--maxw);margin:0 auto;padding:0 24px}.topbar{z-index:50;-webkit-backdrop-filter:saturate(180%)blur(14px);border-bottom:1px solid var(--line);background:#ffffffd9;position:sticky;top:0}.topbar-inner{justify-content:space-between;align-items:center;gap:16px;height:64px;display:flex}.brand{letter-spacing:-.01em;font-weight:700;font-size:calc(17px * var(--fs-scale));align-items:center;gap:10px;display:flex}.brand-mark{border:.75px solid var(--ink);border-radius:8px;width:32px;height:32px}.nav-primary{align-items:center;gap:28px;display:flex}.nav-primary a{font-size:calc(14px * var(--fs-scale));color:var(--ink-2);font-weight:500}.nav-primary a.active{color:var(--orange)}.nav-actions{align-items:center;gap:10px;display:flex}.lang-toggle{background:var(--bg-3);font-size:calc(12px * var(--fs-scale));border-radius:999px;padding:3px;font-weight:600;display:inline-flex}.lang-toggle button{color:var(--ink-3);background:0 0;border:none;border-radius:999px;padding:5px 11px;transition:all .15s}.lang-toggle button.active{color:var(--ink);background:#fff;box-shadow:0 1px 3px #00000014}.btn{height:44px;font-weight:600;font-size:calc(14px * var(--fs-scale));white-space:nowrap;border:1px solid #0000;border-radius:999px;justify-content:center;align-items:center;gap:8px;padding:0 18px;transition:all .18s;display:inline-flex}.btn-primary{background:var(--orange);color:#fff}.btn-primary:hover{background:var(--orange-hover);color:#fff;transform:translateY(-1px)}.btn-ghost{color:var(--ink);border-color:var(--line-2);background:0 0}.btn-ghost:hover{background:var(--bg-3);color:var(--ink)}.btn-lg{height:52px;font-size:calc(15px * var(--fs-scale));padding:0 24px}.footer{border-top:1px solid var(--line);background:var(--bg-2);margin-top:100px;padding:48px 0 60px}.footer-grid{grid-template-columns:2fr 1fr 1fr 1fr;gap:40px;display:grid}.footer h5{font-size:calc(13px * var(--fs-scale));color:var(--ink-4);letter-spacing:.02em;margin:0 0 14px;font-weight:600}.footer ul{margin:0;padding:0;list-style:none}.footer ul li{margin-bottom:10px}.footer ul a{font-size:calc(14px * var(--fs-scale));color:var(--ink-2)}.footer-bottom{border-top:1px solid var(--line);font-size:calc(13px * var(--fs-scale));color:var(--ink-4);justify-content:space-between;align-items:center;margin-top:40px;padding-top:24px;display:flex}.hamburger{cursor:pointer;-webkit-tap-highlight-color:transparent;z-index:60;background:0 0;border:none;flex-direction:column;justify-content:center;gap:5px;width:40px;height:40px;padding:8px;display:none}.hamburger-line{background:var(--ink);border-radius:2px;width:100%;height:2px;transition:transform .25s,opacity .2s;display:block}.hamburger-line.open:first-child{transform:translateY(7px)rotate(45deg)}.hamburger-line.open:nth-child(2){opacity:0}.hamburger-line.open:nth-child(3){transform:translateY(-7px)rotate(-45deg)}.mobile-backdrop{z-index:40;background:#0000004d;display:none;position:fixed;inset:0}.mobile-nav{background:var(--bg);z-index:45;opacity:0;pointer-events:none;flex-direction:column;padding:24px;transition:transform .25s,opacity .2s;display:none;position:fixed;inset:64px 0 0;overflow-y:auto;transform:translateY(-10px)}.mobile-nav-open{opacity:1;pointer-events:auto;transform:translateY(0)}.mobile-nav-link{color:var(--ink-2);border-bottom:1px solid var(--line);padding:14px 0;font-size:16px;font-weight:500;display:block}.mobile-nav-link.active{color:var(--orange)}.mobile-nav-actions{flex-direction:column;align-items:center;gap:16px;margin-top:24px;display:flex}@media (max-width:860px){.nav-primary,.nav-actions{display:none}.hamburger{display:flex}.mobile-backdrop{display:block}.mobile-nav{display:flex}.footer-grid{grid-template-columns:1fr 1fr}}@media (max-width:600px){.container{padding:0 16px}.topbar-inner{height:56px}.brand{font-size:calc(15px * var(--fs-scale))}.brand-mark{width:28px;height:28px}.mobile-nav{top:56px}.footer{margin-top:64px;padding:36px 0 48px}.footer-grid{grid-template-columns:1fr;gap:28px}.footer-bottom{flex-direction:column;align-items:flex-start;gap:10px}.btn-lg{height:48px;font-size:calc(14px * var(--fs-scale));padding:0 20px}}