:root{--weld-primary: #164e63;--weld-primary-light: #1e6b8a;--weld-primary-dark: #0f3a4a;--weld-accent: #0891b2;--weld-surface: #eef2f7;--weld-text: #1e293b;--weld-text-secondary: #64748b;--weld-border: #d1d9e4;--weld-white: #ffffff;--weld-success: #059669;--weld-warning: #d97706;--weld-radius: .75rem;--weld-radius-lg: 1rem;--weld-shadow: 0 1px 3px rgba(0, 0, 0, .1);--weld-shadow-md: 0 4px 12px rgba(0, 0, 0, .08);--weld-shadow-lg: 0 8px 24px rgba(0, 0, 0, .12);--weld-transition: .3s ease}*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}html{scroll-behavior:smooth}body{font-family:Noto Sans JP,sans-serif;color:var(--weld-text);background:var(--weld-white);line-height:1.7;-webkit-font-smoothing:antialiased}img{max-width:100%;height:auto;display:block}a{text-decoration:none;color:inherit}.container{max-width:1200px;margin:0 auto;padding:0 1.5rem}.hide-sp{display:inline}@media (max-width: 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