:root{--color-primary:#2563eb;--color-accent:#06b6d4;--color-purple:#7c3aed;--color-text:#0f172a;--color-text-muted:#64748b;--color-text-sub:#475569;--color-bg:#fff;--color-bg-soft:#f8fafc;--color-bg-muted:#f1f5f9;--color-border:rgba(15,23,42,.08);--color-border-soft:#e2e8f0;--gradient-brand:linear-gradient(90deg,var(--color-accent),var(--color-primary));--gradient-hero:linear-gradient(135deg,#0f172a,#0b1220 60%);--gradient-hero-soft:linear-gradient(180deg,var(--color-bg-soft) 0%,var(--color-bg) 100%);--shadow-sm:0 1px 3px rgba(12,18,28,.06);--shadow-md:0 4px 12px rgba(12,18,28,.08);--shadow-lg:0 12px 28px rgba(12,18,28,.12);--font-sans:"Noto Sans JP",system-ui,sans-serif;--font-size-sm:.875rem;--font-size-base:1rem;--font-size-lg:1.125rem;--font-size-xl:1.25rem;--font-size-2xl:1.75rem;--font-size-3xl:2.25rem;--section-py:64px;--container-max:1100px}*,:after,:before{box-sizing:border-box}html{font-family:var(--font-sans);color:var(--color-text);background:var(--color-bg);-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}body{margin:0;line-height:1.7}img{max-width:100%;height:auto}a{color:inherit}.btn{display:inline-flex;align-items:center;justify-content:center;padding:11px 22px;border-radius:10px;font-family:var(--font-sans);font-weight:700;font-size:.9375rem;line-height:1;text-decoration:none;border:none;cursor:pointer;white-space:nowrap;transition:background .18s ease,box-shadow .18s ease,transform .18s ease,border-color .18s ease,color .18s ease}.btn-primary{background:#2563eb;color:#fff;box-shadow:0 1px 2px #0000001a,inset 0 1px #ffffff1a}.btn-primary:hover{background:#1d4ed8;box-shadow:0 6px 20px #2563eb61;transform:translateY(-2px)}.btn-primary:active{transform:translateY(0);box-shadow:0 1px 2px #0000001a}.btn-ghost{background:transparent;color:#ffffffe0;border:1.5px solid hsla(0,0%,100%,.28)}.btn-ghost:hover{background:#ffffff1a;border-color:#ffffff8c;transform:translateY(-2px)}.btn-outline{background:transparent;color:#2563eb;border:1.5px solid #2563eb}.btn-outline:hover{background:#2563eb;color:#fff;transform:translateY(-2px)}.btn-sm{display:inline-flex;align-items:center;padding:7px 14px;border-radius:8px;font-weight:600;font-size:.8125rem;text-decoration:none;background:#eff6ff;color:#2563eb;border:none;cursor:pointer;transition:background .15s ease,color .15s ease;white-space:nowrap}.btn-sm:hover{background:#2563eb;color:#fff}.btn-sm.disabled,.btn-sm:disabled,.btn-sm[disabled]{background:#f1f5f9;color:#94a3b8;cursor:not-allowed;border:1px solid #e2e8f0}.btn-disabled{display:inline-flex;align-items:center;padding:11px 22px;border-radius:10px;font-weight:700;font-size:.9375rem;background:#f1f5f9;border:none}.btn-disabled,.btn:disabled{color:#94a3b8;cursor:not-allowed}.btn:disabled{background:#e2e8f0;transform:none;box-shadow:none}