:root{--motion-duration-fast: .12s;--motion-duration-normal: .24s;--motion-duration-slow: .4s;--motion-ease: cubic-bezier(.4, 0, .2, 1);--brand-primary: #1E3A2D;--brand-accent: #8B5E34;--brand-paper: #F2EFE4;--brand-earth: #5C3D1E;--brand-warm-gray: #7A7068;--text-color: var(--brand-primary);--bg-color: #F7F4EF;--container-max-width: 1200px;--company-name: "中村建材・中村建設";--brand-secondary: #4D6B5A;--brand-muted: #F2EFE4;--space-xs: 4px;--space-sm: 8px;--space-md: 16px;--space-lg: 24px;--space-xl: 48px;--type-base: 16px;--type-scale-ratio: 1.125;--font-serif: "Noto Serif JP", "Hiragino Mincho ProN", "Yu Mincho", "Times New Roman", serif;--radius-sm: 6px;--radius-md: 8px;--container-padding: 24px}*{box-sizing:border-box}html{scroll-behavior:smooth}html,body{height:100%;margin:0;font-family:var(--font-serif);color:var(--text-color);background:var(--bg-color)}.container{max-width:var(--container-max-width);margin:0 auto;padding:0 var(--container-padding)}.btn{display:inline-block;padding:10px 16px;border-radius:var(--radius-md);text-decoration:none;font-family:var(--font-serif)}.btn-primary{background:var(--brand-primary);color:#fff;border:2px solid var(--brand-primary);transition:background var(--motion-duration-fast) var(--motion-ease),transform var(--motion-duration-normal) var(--motion-ease)}.btn-primary:hover{background:#162b21;border-color:#162b21;transform:translateY(-2px)}.site-header{position:sticky;top:0;z-index:50;display:grid;align-items:stretch;background:var(--bg-color);color:var(--text-color);transition:box-shadow .2s var(--motion-ease);padding:0;min-height:90px}.header-inner{display:grid;grid-template-columns:auto minmax(0,1fr) auto;align-items:center;padding:0 var(--container-padding);position:relative;max-width:var(--container-max-width);margin:0 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.nav-toggle__bar:nth-child(1){transform:translateY(7px) rotate(45deg)}.nav-toggle[aria-expanded=true] .nav-toggle__bar:nth-child(2){opacity:0;transform:scaleX(0)}.nav-toggle[aria-expanded=true] .nav-toggle__bar:nth-child(3){transform:translateY(-7px) rotate(-45deg)}.site-nav .nav-contact-link{display:none}.site-nav a{color:var(--text-color);text-decoration:none;display:inline-flex;align-items:center}.header-cta{display:flex;align-self:stretch;align-items:center;background:var(--brand-primary);margin-left:var(--space-md);border-radius:0}.header-cta .contact-link{display:inline-flex;align-items:center;gap:8px;color:#fff;padding:0 16px;text-decoration:none;height:100%}.header-cta .icon-phone{display:inline-block;width:16px;height:16px;color:currentColor;flex-shrink:0}.site-header.is-scrolled{box-shadow:0 6px 18px #1010100f}@media (max-width: 900px){.header-inner{display:flex;justify-content:space-between;align-items:center;gap:0}.nav-toggle{display:flex;align-items:center;justify-content:center;flex-shrink:0}.site-nav{display:none}.site-nav.is-open{display:flex;position:absolute;top:100%;left:0;right:0;flex-direction:column;background:var(--bg-color);border-top:3px solid var(--brand-primary);box-shadow:0 12px 32px #0000001a;z-index:100;padding:0 0 8px;gap:0;animation:mobileNavIn .22s var(--motion-ease) both}.site-nav.is-open a{display:flex;align-items:center;padding:18px 28px;font-size:1rem;font-weight:600;color:var(--brand-primary);text-decoration:none;border-bottom:1px solid rgba(139,94,52,.4);letter-spacing:.04em;position:relative;transition:background .15s ease}.site-nav.is-open a:last-of-type{border-bottom:none}.site-nav.is-open a:before{content:"";position:absolute;left:0;top:0;bottom:0;width:3px;background:var(--brand-primary);transform:scaleY(0);transform-origin:center;transition:transform .15s 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700px){.footer-inner{flex-direction:column;gap:24px;align-items:stretch}.footer-left{max-width:none}.footer-brand{gap:10px}.footer-logo{width:36px;height:36px}.footer-company{font-size:1.1rem}.footer-telfax{flex-wrap:wrap;gap:8px 16px}.footer-links{padding:0;gap:8px 24px}.footer-cta{justify-content:flex-start}}@media (max-width: 400px){.footer-links{grid-template-columns:1fr}}.motion-reveal{opacity:0;transform:translateY(12px);transition:opacity var(--motion-duration-normal) var(--motion-ease),transform var(--motion-duration-normal) var(--motion-ease);will-change:opacity,transform}.motion-reveal.is-revealed{opacity:1;transform:none}.motion-card-lift{transition:transform var(--motion-duration-normal) var(--motion-ease),box-shadow var(--motion-duration-normal) var(--motion-ease)}.motion-card-lift:hover,.motion-card-lift:focus{transform:translateY(-6px) scale(1.02);box-shadow:0 8px 24px #13131314}.motion-cta{transition:transform var(--motion-duration-fast) var(--motion-ease)}@media 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