:root{--bg:#FAFAF8;--bg-warm:#F4F2EE;--surface:#FFF;--ink:#1A1A1A;--ink-mid:#555;--ink-light:#8A8A8A;--green:#16A34A;--green-light:#DCFCE7;--green-dark:#0D7A33;--border:#E8E5E0;--radius-full:100px}
*{margin:0;padding:0;box-sizing:border-box}
body{font-family:'DM Sans',sans-serif;background:var(--bg);color:var(--ink);-webkit-font-smoothing:antialiased}
body>nav{position:fixed;top:0;left:0;right:0;z-index:1000;padding:16px 32px;display:flex;justify-content:space-between;align-items:center;background:#fff;border-bottom:1px solid var(--border);box-shadow:0 1px 8px rgba(0,0,0,.06)}
article nav,.article nav{position:static;top:auto;left:auto;right:auto;z-index:auto;padding:0;display:block;background:none;border-bottom:none;box-shadow:none}
.logo{display:flex;align-items:center;gap:8px;text-decoration:none}
.logo-mark{flex-shrink:0;line-height:0}
.logo-text{font-family:'Plus Jakarta Sans',sans-serif;font-weight:700;font-size:1.12rem;letter-spacing:-.3px;color:var(--ink)}
.logo-text span{color:var(--green)}
.nav-cta{background:var(--green);color:#fff;padding:10px 24px;border-radius:var(--radius-full);font-weight:700;font-size:.9rem;text-decoration:none;transition:all .25s}
.nav-cta:hover{background:var(--green-dark)}
.article{max-width:720px;margin:0 auto;padding:100px 24px 60px}
.breadcrumb{font-size:.82rem;color:var(--ink-light);margin-bottom:24px}
.breadcrumb a{color:var(--green);text-decoration:none}.breadcrumb a:hover{text-decoration:underline}
.read-time{font-size:.78rem;color:var(--ink-light);font-style:italic}
.updated-date{display:block;font-size:.78rem;color:var(--ink-light);margin-bottom:20px;font-style:italic}
h1{font-size:clamp(2rem,5vw,2.8rem);font-weight:800;letter-spacing:-1.5px;line-height:1.1;margin-bottom:16px}
.article-intro{font-size:1.1rem;color:var(--ink-mid);line-height:1.6;margin-bottom:40px;border-left:3px solid var(--green);padding-left:16px}
h2{font-size:1.25rem;font-weight:700;margin-top:36px;margin-bottom:10px;color:var(--ink)}
h3{font-size:1.05rem;font-weight:600;margin-top:20px;margin-bottom:8px;color:var(--ink)}
p{color:var(--ink-mid);font-size:1rem;line-height:1.7;margin-bottom:16px}
.toc{background:var(--surface);border:1px solid var(--border);border-radius:12px;padding:20px 24px;margin-bottom:36px}
.toc-title{font-weight:700;font-size:.88rem;color:var(--ink);margin-bottom:10px;text-transform:uppercase;letter-spacing:.5px}
.toc ol{padding-left:20px;margin:0}
.toc li{margin-bottom:6px;font-size:.92rem;line-height:1.4}
.toc a{color:var(--green);text-decoration:none;font-weight:500}
.toc a:hover{text-decoration:underline}
.info-table{width:100%;border-collapse:collapse;margin:16px 0 24px;font-size:.92rem}
.info-table th{text-align:left;padding:10px 14px;background:var(--bg-warm);font-weight:700;font-size:.82rem;text-transform:uppercase;letter-spacing:.3px;color:var(--ink-mid);border-bottom:2px solid var(--border)}
.info-table td{padding:10px 14px;border-bottom:1px solid var(--border)}
.info-table tr:last-child td{border-bottom:none}
.cta-box{background:var(--green-light);border:1px solid rgba(22,163,74,.15);border-radius:16px;padding:28px;text-align:center;margin:40px 0}
.cta-box p{color:var(--green-dark);margin-bottom:14px;font-weight:600}
.cta-btn{display:inline-block;background:var(--green);color:#fff;padding:14px 32px;border-radius:var(--radius-full);font-weight:700;font-size:1rem;text-decoration:none;transition:all .25s}
.cta-btn:hover{background:var(--green-dark);transform:translateY(-2px)}
.faq-section{margin-top:40px;padding-top:32px;border-top:1px solid var(--border)}
.faq-section h2{margin-top:0}
.faq-item{border:1px solid var(--border);border-radius:10px;margin-bottom:8px;overflow:hidden}
.faq-item summary{padding:14px 18px;font-weight:600;font-size:.95rem;cursor:pointer;list-style:none;display:flex;justify-content:space-between;align-items:center}
.faq-item summary::after{content:'+';font-size:1.2rem;color:var(--green);font-weight:700;transition:transform .2s}
.faq-item[open] summary::after{transform:rotate(45deg)}
.faq-item p{padding:0 18px 14px;margin:0;font-size:.92rem}
.related{margin-top:48px;padding-top:32px;border-top:1px solid var(--border)}
.related h3{font-size:1rem;font-weight:700;margin-bottom:12px}
.seo-link{display:inline-block;color:var(--green);text-decoration:none;font-weight:600;font-size:.92rem;margin:4px 12px 4px 0;padding:6px 14px;background:var(--green-light);border-radius:8px;transition:all .2s}
.seo-link:hover{background:var(--green);color:#fff}
footer{text-align:center;padding:40px 24px;font-size:.82rem;color:var(--ink-light);border-top:1px solid var(--border);margin-top:40px}
@media(max-width:600px){nav{padding:12px 16px}.article{padding:80px 16px 40px}h1{font-size:1.6rem}}