:root{--primary-blue:#57C0FD;--slap-blue:#3b8bf5;--deep-blue:#3AABF0;--light-blue:#EBF7FF;--accent-blue:#7DD3FF;--accent-yellow:#FECA20;--text-primary:#111827;--text-secondary:#6b7280;--border:#e5e7eb;--background:#ffffff;--background-soft:#f6f8fc;--white:#ffffff;--radius-sm:4px;--radius-md:8px;--radius-sticker:18px;--shadow-s:0 2px 8px rgba(87,192,253,0.10);--shadow-m:0 8px 24px rgba(87,192,253,0.14);--shadow-hover:0 10px 28px rgba(87,192,253,0.18);--ease-out:cubic-bezier(0.22,1,0.36,1);--content-width:1280px;--page-width:1280px;--main-column:1fr;--side-column:280px;--gap-column:32px;--gap-card:14px;--shell-padding-left:24px;--shell-padding-right:24px;--page-gutter:clamp(28px,4vw,56px);--page-gutter-mobile:32px;--main-padding-top:28px;--main-padding-top-tight:20px;--main-padding-bottom:56px;--section-gap:28px;--article-column:660px;--article-sidebar-gap:48px;--space-1:4px;--space-2:8px;--space-3:12px;--space-4:16px;--space-5:20px;--space-6:24px;--space-7:32px;--space-8:40px}*{box-sizing:border-box;margin:0;padding:0}html{font-size:16px;scroll-behavior:smooth;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}body{min-height:100dvh;background:var(--background-soft);color:var(--text-primary);font-family:var(--font-noto),"Hiragino Kaku Gothic ProN","Hiragino Sans",sans-serif;line-height:1.75}a{color:inherit;text-decoration:none;cursor:pointer}img{max-width:100%}button,input{font:inherit}[role=button],button,label{cursor:pointer}:focus-visible{outline:3px solid rgba(87,192,253,.38);outline-offset:3px}::selection{background:var(--accent-yellow);color:var(--text-primary)}