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