:root{--bg:#f5f7f4;--panel:#ffffff;--ink:#1e2a30;--muted:#66747c;--line:#dfe7e2;--brand:#2f8f62;--brand-dark:#1f6f4b;--soft:#e8f4ec;--warn:#f5eee2;--shadow:0 18px 45px rgba(26,44,55,.08)}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","Microsoft YaHei",Arial,sans-serif;background:var(--bg);color:var(--ink);line-height:1.7}a{color:inherit;text-decoration:none}img{max-width:100%;height:auto;display:block}.site-header{position:sticky;top:0;background:rgba(245,247,244,.95);backdrop-filter:blur(12px);z-index:20;border-bottom:1px solid var(--line)}.topbar{font-size:14px;text-align:center;padding:8px 16px;color:var(--muted);background:#eef5ef}.navbar{display:flex;align-items:center;gap:24px;max-width:1180px;margin:0 auto;padding:14px 20px}.brand-logo{display:inline-flex;align-items:center;gap:10px;font-weight:800;font-size:20px;color:var(--brand-dark)}.logo-mark{display:inline-grid;place-items:center;width:38px;height:38px;border-radius:14px;background:var(--brand);color:#fff;box-shadow:var(--shadow)}.nav-links{display:flex;flex-wrap:wrap;gap:8px;margin:0 0 0 auto;padding:0;list-style:none}.nav-links a{display:block;padding:8px 12px;border-radius:999px;color:#415057;font-size:15px}.nav-links a:hover,.nav-links a.active{background:var(--soft);color:var(--brand-dark)}.nav-toggle{display:none;margin-left:auto;border:1px solid var(--line);background:#fff;border-radius:999px;padding:8px 12px}.search-strip{max-width:1180px;margin:0 auto 14px;padding:0 20px;display:grid;grid-template-columns:auto 1fr auto;gap:10px;align-items:center}.search-strip label{font-weight:700;color:#394b53}.search-strip input{width:100%;border:1px solid var(--line);border-radius:16px;padding:12px 14px;background:#fff}.search-strip 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p{margin:0;color:var(--muted);font-size:17px}.grid{display:grid;gap:20px}.grid-3{grid-template-columns:repeat(3,1fr)}.grid-2{grid-template-columns:repeat(2,1fr)}.card{padding:24px}.card h3{margin:0 0 10px;font-size:22px}.card p{color:var(--muted);margin:0 0 12px}.tag-list{display:flex;gap:8px;flex-wrap:wrap;margin-top:12px}.tag{background:var(--soft);color:var(--brand-dark);border-radius:999px;padding:5px 10px;font-size:13px}.video-card{overflow:hidden;position:relative;background:#fff}.video-thumb{position:relative;overflow:hidden}.video-thumb img{width:100%;aspect-ratio:16/10;object-fit:cover;transition:transform .3s ease}.video-overlay{position:absolute;inset:0;background:rgba(25,43,51,.28);display:grid;place-items:center;opacity:0;transition:opacity .25s ease}.video-card:hover .video-overlay{opacity:1}.video-card:hover .video-thumb img{transform:scale(1.04)}.play-button{width:68px;height:68px;border-radius:50%;background:rgba(255,255,255,.92);display:grid;place-items:center;color:var(--brand-dark);font-size:26px}.video-body{padding:20px}.video-meta{display:flex;flex-wrap:wrap;gap:10px;color:var(--muted);font-size:14px}.steps{counter-reset:step}.step{padding:22px;position:relative}.step::before{counter-increment:step;content:counter(step);display:grid;place-items:center;width:34px;height:34px;border-radius:12px;background:var(--brand);color:#fff;font-weight:800;margin-bottom:12px}.log-item{padding:18px 20px;display:flex;gap:16px;align-items:flex-start}.log-date{min-width:110px;color:var(--brand-dark);font-weight:800}.faq-list{display:grid;gap:14px}.faq-item{padding:20px}.faq-item summary{cursor:pointer;font-weight:800;font-size:18px}.faq-item p{margin:10px 0 0;color:var(--muted)}.quote-card{padding:22px}.quote-card blockquote{margin:0;color:#35454d}.quote-card 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@media (max-width:900px){.steps[style]{grid-template-columns:1fr!important}}