:root{--green:#1db77c;--green-text:#0f7d53;--ink:#2b3f53;--muted:#5a6978;--bg:#f6fbf8}*{box-sizing:border-box;margin:0;padding:0}body{color:var(--ink);-webkit-font-smoothing:antialiased;background-color:#fff;font-family:LINE Seed JP,Noto Sans,sans-serif;line-height:1.9}a{color:inherit}.col-header{z-index:50;-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);background-color:#ffffffeb;border-bottom:1px solid #eef2ef;justify-content:space-between;align-items:center;padding:14px 24px;display:flex;position:sticky;top:0}.col-header img{height:28px}.col-header-cta{background-color:var(--green);color:#fff;border-radius:999px;padding:10px 20px;font-size:14px;font-weight:700;text-decoration:none;display:inline-block}.col-breadcrumb{max-width:760px;color:var(--muted);margin:24px auto 0;padding:0 24px;font-size:12px}.col-breadcrumb a{color:var(--green-text);text-decoration:none}.col-article{max-width:760px;margin:0 auto;padding:24px 24px 64px}.col-tag{color:var(--green-text);background-color:#1db77c1a;border-radius:999px;margin-bottom:16px;padding:5px 12px;font-size:12px;font-weight:700;display:inline-block}.col-article h1{margin-bottom:16px;font-size:30px;line-height:1.5}.col-meta{color:var(--muted);margin-bottom:32px;font-size:13px}.col-article h2{border-left:5px solid var(--green);margin:48px 0 16px;padding-left:14px;font-size:22px;line-height:1.5}.col-article h3{margin:32px 0 12px;font-size:18px}.col-article p{color:#3a4a59;margin-bottom:20px;font-size:16px}.col-article ul,.col-article ol{margin:0 0 20px 1.4em}.col-article li{color:#3a4a59;margin-bottom:10px;font-size:16px}.col-article strong{color:var(--ink);font-weight:700}.col-lead{color:var(--muted);background-color:var(--bg);border-radius:16px;margin-bottom:8px;padding:24px;font-size:17px}.col-table{border-collapse:collapse;width:100%;margin-bottom:24px;font-size:15px}.col-table th,.col-table td{text-align:left;border:1px solid #e6ebe8;padding:12px 14px}.col-table th{background-color:var(--bg);font-weight:700}.col-cta{background-color:var(--bg);text-align:center;border-radius:20px;margin:48px 0;padding:32px 24px}.col-cta h2{border:none;margin:0 0 12px;padding:0;font-size:22px}.col-cta p{color:var(--muted);margin-bottom:24px;font-size:15px}.col-cta-button{background-color:var(--green);color:#fff;border-radius:999px;padding:18px 48px;font-size:18px;font-weight:700;text-decoration:none;display:inline-block;box-shadow:0 8px 20px #1db77c40}.col-related{max-width:760px;margin:0 auto;padding:0 24px 72px}.col-related h2{margin-bottom:20px;font-size:20px}.col-related-grid{grid-template-columns:1fr 1fr;gap:16px;display:grid}.col-related-card{border:1px solid #eef2ef;border-radius:16px;padding:20px;text-decoration:none;transition:box-shadow .2s,transform .2s;display:block}.col-related-card:hover{transform:translateY(-3px);box-shadow:0 10px 24px #1db77c1f}.col-related-card span{color:var(--green-text);font-size:12px;font-weight:700}.col-related-card p{margin-top:8px;font-size:15px;font-weight:700;line-height:1.6}.col-footer{background-color:var(--ink);color:#cfd8e0;text-align:center;padding:32px 24px;font-size:13px}.col-footer a{color:#fff;font-weight:700;text-decoration:none}@media (max-width:640px){.col-article h1{font-size:24px}.col-related-grid{grid-template-columns:1fr}}