:root{--bg:#fff;--bg-alt:#f4f7f8;--bg-mint:#eef9f6;--panel:#fff;--panel2:#f4f6f8;--line:#e4e8ec;--txt:#17181f;--muted:#5b616c;--accent:#00e0b8;--accent-ink:#0b7a66;--on-accent:#05271f;--tint:#e6f7f2;--tint-line:#b6e5d9;--shadow:0 1px 2px #14202c0d, 0 10px 26px #14202c0d}*{box-sizing:border-box;margin:0;padding:0}html{scroll-behavior:smooth}body{background:var(--bg);color:var(--txt);-webkit-font-smoothing:antialiased;font-family:Hiragino Kaku Gothic ProN,Noto Sans JP,Yu Gothic UI,Meiryo,sans-serif;line-height:1.85}.container{max-width:1040px;margin:0 auto;padding:0 24px}.container-narrow{max-width:760px;margin:0 auto;padding:0 24px}.accent{color:var(--accent-ink)}.muted{color:var(--muted)}.small{font-size:.85rem}.center{text-align:center}.site-header{z-index:50;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);border-bottom:1px solid var(--line);background:#ffffffe0;position:sticky;top:0}.header-inner{align-items:center;gap:24px;height:60px;display:flex}.logo{color:var(--txt);letter-spacing:.02em;align-items:center;gap:9px;font-size:1.1rem;font-weight:800;text-decoration:none;display:flex}.nav{gap:20px;margin-left:auto;display:flex}.nav a{color:var(--muted);font-size:.9rem;text-decoration:none}.nav a:hover{color:var(--txt)}.btn{cursor:pointer;text-align:center;border:none;border-radius:10px;padding:15px 36px;font-family:inherit;font-size:1rem;font-weight:700;line-height:1.4;text-decoration:none;display:inline-block}.btn-primary{background:var(--accent);color:var(--on-accent);box-shadow:0 6px 18px #00e0b838}.btn-primary:hover{filter:brightness(1.06)}.btn-sm{border-radius:8px;padding:9px 20px;font-size:.85rem}.section{padding:64px 0}.section-cta{background-color:var(--bg-mint);border-top:1px solid var(--line);text-align:center}.kicker{color:var(--accent-ink);letter-spacing:.28em;margin-bottom:10px;font-size:.78rem;font-weight:700}.cta-p{margin-top:26px;margin-bottom:14px}.card{background:var(--panel);border:1px solid var(--line);box-shadow:var(--shadow);border-radius:14px;padding:28px}.col-lead{text-align:left;max-width:560px;margin:22px auto 0}.col-lead-row{grid-template-columns:1.4fr 1fr;gap:12px;display:grid}.col-lead label{color:var(--text);font-size:13px;font-weight:600;display:block}.col-lead input{border:1px solid var(--line);background:var(--panel2);width:100%;color:var(--text);box-sizing:border-box;border-radius:9px;margin-top:6px;padding:11px 12px;font-size:14px}.col-lead input:focus{border-color:var(--accent);outline:none}.col-lead .btn-wide{width:100%;margin-top:14px}.col-lead #col-lead-status{text-align:center;margin:10px 0 0}.col-lead-alt{margin-top:18px}@media (max-width:560px){.col-lead-row{grid-template-columns:1fr}}.badge{border-radius:999px;padding:3px 12px;font-size:.75rem;font-weight:700;display:inline-block}.badge.inbound{background:var(--tint);color:var(--accent-ink);border:1px solid var(--tint-line)}.badge.internal{color:#33509e;background:#eef2fb;border:1px solid #ccd8f2}.badge.common{background:var(--panel2);color:var(--muted);border:1px solid var(--line)}.site-footer{border-top:1px solid var(--line);background:var(--bg);padding:28px 0}.footer-inner{color:var(--muted);flex-wrap:wrap;justify-content:space-between;align-items:center;gap:8px;font-size:.88rem;display:flex}.footer-brand{align-items:center;gap:8px;display:flex}.footer-inner a{text-decoration:none}.footer-inner{flex-direction:column;align-items:flex-start}.footer-brand{flex-wrap:wrap;gap:2px 14px}.footer-brand span{white-space:nowrap;align-items:center;gap:8px;display:inline-flex}.footer-links{flex-wrap:wrap;gap:6px 20px;font-size:.82rem;display:flex}.footer-links a{color:var(--muted);white-space:nowrap;text-decoration:none}.footer-links a:hover{color:var(--txt)}.footer-links .ext:after{content:"↗";opacity:.6;margin-left:3px;font-size:.8em}.article h1{margin:10px 0 14px;font-size:max(1.5rem,min(3.4vw,2.05rem));font-weight:800;line-height:1.45}.article-meta{color:var(--muted);flex-wrap:wrap;align-items:center;gap:14px;margin-bottom:26px;font-size:.85rem;display:flex}.article .lead{color:var(--muted);font-size:1.02rem}.prose h2{border-left:4px solid var(--accent);margin:44px 0 14px;padding-left:14px;font-size:1.32rem;font-weight:800;line-height:1.5}.prose h3{margin:30px 0 10px;font-size:1.08rem;font-weight:700}.prose p{margin:0 0 18px}.prose ul,.prose ol{margin:0 0 18px;padding-left:1.5em}.prose li{margin-bottom:8px}.prose blockquote{border-left:4px solid var(--tint-line);background:var(--bg-mint);color:var(--txt);border-radius:0 10px 10px 0;margin:0 0 20px;padding:14px 18px;font-size:.95rem}.prose blockquote p{margin:0 0 6px}.prose blockquote p:last-child{margin:0}.prose a{color:var(--accent-ink);font-weight:600}.prose strong{color:var(--txt)}.prose hr{border:none;border-top:1px solid var(--line);margin:34px 0}.faq-block{margin-top:46px}.faq-block h2{margin-bottom:16px;font-size:1.25rem;font-weight:800}.faq-item{border:1px solid var(--line);background:var(--panel);border-radius:12px;margin-bottom:12px;padding:18px 20px}.faq-item .q{margin-bottom:6px;font-weight:700}.faq-item .q:before{content:"Q. 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