:root{color-scheme:light;--bg:#f7f9fc;--surface:#ffffff;--surface-soft:#eef5ff;--ink:#122033;--muted:#5c6b7f;--line:#dbe3ef;--blue:#1f6feb;--blue-dark:#164ea6;--green:#0a7f56;--amber:#b56a00}*{box-sizing:border-box}body,html{margin:0;min-height:100%;background:var(--bg);color:var(--ink);font-family:Arial,Hiragino Kaku Gothic ProN,Yu Gothic,Meiryo,sans-serif}a{color:inherit}.site-shell{min-height:100vh;display:flex;flex-direction:column}.nav{position:sticky;top:0;z-index:10;border-bottom:1px solid var(--line);background:rgba(255,255,255,.94);backdrop-filter:blur(10px)}.container,.nav-inner{width:min(1120px,calc(100% - 32px));margin:0 auto}.nav-inner{height:64px;display:flex;align-items:center;justify-content:space-between;gap:20px}.brand{font-weight:900;letter-spacing:0;text-decoration:none}.nav-links{display:flex;align-items:center;gap:16px;font-size:14px;color:var(--muted)}.nav-links a{text-decoration:none}.main{flex:1}.hero{padding:56px 0 32px}.hero-grid{display:grid;grid-template-columns:minmax(0,1.1fr) minmax(320px,.9fr);gap:28px;align-items:start}.eyebrow{display:inline-flex;align-items:center;gap:8px;color:var(--green);font-weight:800;font-size:13px;margin-bottom:14px}h1,h2,h3{letter-spacing:0}h1{margin:0;font-size:clamp(36px,5vw,64px);line-height:1.05}.lead{margin:18px 0 0;color:var(--muted);font-size:17px;line-height:1.8}.actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:26px}.button{display:inline-flex;align-items:center;justify-content:center;min-height:44px;padding:0 18px;border-radius:8px;border:1px solid var(--line);text-decoration:none;font-weight:800;font-size:14px}.button.primary{background:var(--blue);border-color:var(--blue);color:#fff}.button.primary:hover{background:var(--blue-dark)}.ad-box,.card,.notice,.panel{background:var(--surface);border:1px solid var(--line);border-radius:8px}.panel{padding:22px}.notice{padding:16px;color:var(--muted);line-height:1.7}.section{padding:34px 0}.section h2{margin:0 0 16px;font-size:28px}.grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}.card{padding:18px}.card h3{margin:0 0 8px;font-size:18px}.article li,.article p,.card p{color:var(--muted);line-height:1.8}.metric{display:grid;grid-template-columns:1fr auto;gap:12px;padding:12px 0;border-top:1px solid var(--line)}.metric:first-child{border-top:0}.metric strong{font-size:18px}.race-list{display:grid;gap:12px}.race-row{display:grid;grid-template-columns:80px 1fr auto;gap:14px;align-items:center;padding:16px;text-decoration:none;background:var(--surface);border:1px solid var(--line);border-radius:8px}.rank{font-weight:900;color:var(--blue)}.tag{display:inline-flex;align-items:center;min-height:24px;padding:0 8px;border-radius:999px;background:var(--surface-soft);color:var(--blue-dark);font-size:12px;font-weight:800}.ad-box{padding:16px;text-align:center;color:var(--muted);font-size:13px}.ad-box-link{display:grid;gap:4px;text-decoration:none;transition:border-color .15s ease,background .15s ease}.ad-box-link strong{color:var(--blue-dark);font-size:14px}.ad-box-link span{color:var(--muted)}.ad-box-link:hover{border-color:var(--blue);background:var(--surface-soft)}.sponsor-box{text-align:left}.ad-label{width:fit-content;min-height:22px;padding:2px 8px;border-radius:999px;background:var(--surface-soft);color:var(--blue-dark);font-size:11px;font-weight:900}.ad-cta{color:var(--blue);font-weight:800}.article{max-width:840px;padding:34px 0}.article h1{font-size:clamp(32px,4vw,48px)}.article h2{margin-top:34px}.footer{margin-top:42px;border-top:1px solid var(--line);background:#fff}.footer-inner{min-height:84px;display:flex;align-items:center;justify-content:space-between;gap:16px;color:var(--muted);font-size:13px}@media (max-width:820px){.grid,.hero-grid{grid-template-columns:1fr}.nav-inner{height:auto;padding:14px 0;align-items:flex-start}.nav-links{flex-wrap:wrap;justify-content:flex-end;gap:10px}.race-row{grid-template-columns:56px 1fr}.race-row .tag{grid-column:2;justify-self:start}}