* { margin: 0; padding: 0; box-sizing: border-box; }
:root { font-family: var(--font-family-ja), var(--font-family-en); font-size: 16px; line-height: 1.6; color: var(--ink); background-color: var(--paper); }
html { scroll-behavior: smooth; }
body { font-family: inherit; font-size: inherit; line-height: inherit; color: inherit; background-color: inherit; }
a { color: var(--accent); text-decoration: none; transition: color var(--transition-fast); }
a:hover { color: var(--success); }
h1,h2,h3,h4,h5,h6 { font-weight: 700; line-height: 1.2; margin-bottom: var(--spacing-sm); }
h1 { font-size: 2.5rem; letter-spacing: -0.02em; }
h2 { font-size: 2rem; letter-spacing: -0.01em; }
h3 { font-size: 1.5rem; }
h4 { font-size: 1.25rem; }
p { margin-bottom: var(--spacing-sm); }
ul,ol { margin-bottom: var(--spacing-sm); padding-left: var(--spacing-md); }
li { margin-bottom: var(--spacing-xs); }
.container { max-width: 1200px; margin: 0 auto; padding: 0 var(--spacing-md); }
.section { padding: var(--spacing-xl) 0; }
.card { background-color: var(--card); border-radius: var(--radius-md); padding: var(--spacing-md); box-shadow: 0 2px 8px var(--shadow); border: 1px solid var(--border); }
.btn { display: inline-flex; align-items: center; justify-content: center; gap: var(--spacing-xs); padding: 12px 24px; font-size: 1rem; font-weight: 600; border-radius: var(--radius-md); border: none; cursor: pointer; transition: all var(--transition-fast); text-decoration: none; }
.btn-primary { background-color: var(--accent); color: var(--white); }
.btn-primary:hover { background-color: var(--success); color: var(--white); }
.btn-secondary { background-color: var(--white); color: var(--ink); border: 1px solid var(--border); }
.btn-secondary:hover { background-color: var(--wash); border-color: var(--accent); color: var(--accent); }
.btn-large { padding: 16px 32px; font-size: 1.125rem; }
.grid { display: grid; gap: var(--spacing-md); }
.grid-2 { grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); }
.grid-3 { grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); }
.grid-4 { grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); }
.text-center { text-align: center; }
.text-muted { color: var(--ink-muted); }
.text-accent { color: var(--accent); }
.product-hero { padding: 76px 0 54px; text-align: center; }
.product-hero .eyebrow { margin-bottom: 10px; }
.product-hero p { max-width: 720px; margin-left: auto; margin-right: auto; font-size: 1.0625rem; line-height: 1.9; }
.product-actions { display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; margin-top: 26px; }
.feature-grid { display: grid; grid-template-columns: repeat(2,minmax(0,1fr)); gap: 18px; }
.feature-grid .card h3 { font-size: 1.2rem; }
.site-note { max-width: 820px; margin: 0 auto; }
@media (max-width: 760px) { .feature-grid { grid-template-columns: 1fr; } }