:root{--color-primary: #009ef3;--color-primary-dark: #007bbd;--color-primary-light: #e8f4fc;--color-accent: #6bb6ff;--color-cheapest: #00b050;--color-bg: #eaedf2;--color-surface: #ffffff;--color-surface-raised: #f8fafd;--color-text: #333333;--color-text-muted: #777777;--color-border: #dde3ec;--color-tag-bg: #e8f4fc;--color-tag-text: #007bbd;--font-heading: "Quicksand", ui-sans-serif, system-ui, -apple-system, "Hiragino Kaku Gothic ProN", "Hiragino Sans", Meiryo, sans-serif;--font-body: ui-sans-serif, system-ui, -apple-system, "Hiragino Kaku Gothic ProN", "Hiragino Sans", Meiryo, sans-serif;--font-mono: ui-monospace, monospace;--radius: 10px;--radius-lg: 16px;--radius-xl: 24px;--shadow-sm: 0 2px 8px rgba(0,50,100,.07);--shadow-md: 0 4px 16px rgba(0,50,100,.1);--shadow-lg: 0 8px 28px rgba(0,50,100,.13);--shadow-hover: 0 16px 40px rgba(0,50,100,.18);--max-width: 1120px;--content-width: 780px}*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}html{font-size:16px;scroll-behavior:smooth;scroll-padding-top:80px}body{font-family:var(--font-body);background-color:var(--color-bg);color:var(--color-text);line-height:1.85;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;word-break:break-word}img{max-width:100%;height:auto;display:block}a{color:var(--color-primary);transition:color .15s;text-decoration:none}a:hover{color:var(--color-primary-dark)}h1,h2,h3,h4{font-family:var(--font-heading);font-weight:700}h1{font-size:clamp(1.6rem,5vw,2.4rem);line-height:1.2;letter-spacing:-.02em}h2{font-size:clamp(1.25rem,3.5vw,1.7rem);line-height:1.3;margin:2.5rem 0 1rem}h3{font-size:clamp(1.1rem,2.5vw,1.35rem);margin:1.75rem 0 .6rem}p{margin:0 0 1.2rem}.container{max-width:var(--max-width);margin:0 auto;padding:0 1rem}@media(min-width:640px){.container{padding:0 1.5rem}}.site-header{background:#fff;border-bottom:3px solid var(--color-primary);position:sticky;top:0;z-index:100;box-shadow:0 2px 12px #0064c814}.site-header__inner{display:flex;align-items:center;justify-content:space-between;height:60px;max-width:var(--max-width);margin:0 auto;padding:0 1rem}@media(min-width:640px){.site-header__inner{padding:0 1.5rem;height:64px}}.site-header__logo{font-family:var(--font-heading);font-weight:800;font-size:1.15rem;color:var(--color-primary);text-decoration:none;display:flex;align-items:center;gap:.4rem}.site-header__logo:hover{color:var(--color-primary-dark)}.site-header__nav{display:none;gap:1.5rem}@media(min-width:768px){.site-header__nav{display:flex}}.site-header__nav a{font-size:.9rem;font-weight:600;color:var(--color-text-muted);text-decoration:none;padding:.3rem 0;border-bottom:2px solid transparent;transition:color .15s,border-color .15s}.site-header__nav a:hover{color:var(--color-primary);border-bottom-color:var(--color-primary)}main{min-height:60vh;padding:0}.site-footer{background:#2b3a4e;color:#a0aec0;padding:2.5rem 1rem 2rem;margin-top:4rem;font-size:.875rem}@media(min-width:640px){.site-footer{padding:3rem 1.5rem 2rem}}.site-footer__inner{max-width:var(--max-width);margin:0 auto;display:flex;flex-direction:column;gap:1rem;align-items:center;text-align:center}.site-footer a{color:#718096;text-decoration:none;transition:color .15s}.site-footer a:hover{color:#e2e8f0}.site-footer__links{display:flex;gap:1.5rem;flex-wrap:wrap;justify-content:center;font-weight:500}.site-footer__copyright{color:#4a5568;font-size:.875rem}.site-footer__affiliate{font-size:.78rem;color:#4a5568;border-top:1px solid #374151;padding-top:1rem;width:100%;max-width:640px;line-height:1.7}.badge{display:inline-block;font-size:.7rem;font-weight:700;padding:.2em .7em;border-radius:99px;text-transform:uppercase;letter-spacing:.04em}.badge--category{background:var(--color-primary-light);color:var(--color-primary-dark)}.section-title{font-family:var(--font-heading);font-size:1.4rem;font-weight:800;margin-bottom:1.5rem;display:flex;align-items:center;gap:.5rem;color:var(--color-text)}.section-title:before{content:"";display:inline-block;width:4px;height:1.3rem;background:var(--color-primary);border-radius:2px}.article-card{background:var(--color-surface);border:1px solid var(--color-border);border-radius:var(--radius-lg);box-shadow:var(--shadow-sm);overflow:hidden;transition:transform .22s ease,box-shadow .22s ease}.article-card:hover{transform:translateY(-5px);box-shadow:var(--shadow-hover)}.prose{line-height:1.85}.prose h2{border-left:4px solid var(--color-primary);padding-left:.875rem;border-bottom:none}.prose h2,.prose h3,.prose h4{scroll-margin-top:80px}.prose h3{color:var(--color-primary-dark)}.prose ul,.prose ol{padding-left:1.5rem;margin-bottom:1.2rem}.prose li{margin-bottom:.4rem}.prose table{width:100%;border-collapse:collapse;margin:1.5rem 0;font-size:.9rem;border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow-sm)}.prose th{background:var(--color-primary);color:#fff;padding:.65rem 1rem;text-align:left;font-weight:600}.prose td{padding:.65rem 1rem;border-bottom:1px solid var(--color-border)}.prose tr:last-child td{border-bottom:none}.prose tr:nth-child(2n) td{background:var(--color-surface-raised)}.prose blockquote{border-left:4px solid var(--color-accent);padding:.75rem 1rem;background:var(--color-primary-light);border-radius:0 var(--radius) var(--radius) 0;margin:1.5rem 0;color:#1e5a8a}.prose code{font-family:var(--font-mono);font-size:.875em;background:#f0f4f8;padding:.1em .35em;border-radius:4px}.prose pre{background:#1e2a3a;color:#e2e8f0;padding:1.25rem;border-radius:var(--radius);overflow-x:auto;margin:1.5rem 0}.prose pre code{background:none;padding:0}.prose a{font-weight:600;text-decoration:underline;text-underline-offset:2px}.prose img{border-radius:var(--radius-lg);margin:1.5rem auto;box-shadow:var(--shadow-md);transition:box-shadow .2s}.prose img:hover{box-shadow:var(--shadow-hover)}::-webkit-scrollbar{width:6px}::-webkit-scrollbar-track{background:var(--color-bg)}::-webkit-scrollbar-thumb{background:#c0cad8;border-radius:3px}::-webkit-scrollbar-thumb:hover{background:#9aaabb}