.seoart-root{--s-bg:#fff;--s-ink:#0b0b0a;--s-ink-2:#1a1a18;--s-mute:#6b6b66;--s-line:rgba(0,0,0,.1);--s-soft:rgba(11,11,10,.04);background:var(--s-bg);color:var(--s-ink);min-height:100vh;font-family:var(--font-geist-sans),"Geist",-apple-system,system-ui,sans-serif;-webkit-font-smoothing:antialiased}.seoart-root,.seoart-root *{box-sizing:border-box}.seoart-root a{color:inherit;text-decoration:none}.seoart-nav{justify-content:space-between;gap:16px;max-width:1080px;margin:0 auto;padding:18px 24px;border-bottom:1px solid var(--s-line)}.seoart-nav,.seoart-nav__brand{display:flex;align-items:center}.seoart-nav__brand{gap:10px;font-weight:700;font-size:.98rem;letter-spacing:-.01em}.seoart-nav__logo{width:34px;height:34px;border-radius:8px;object-fit:cover;display:block;background:#f2f2f0}.seoart-cta{display:inline-flex;align-items:center;gap:8px;padding:11px 20px;border-radius:999px;border:1px solid rgba(0,0,0,.16);background:hsla(0,0%,100%,.6);-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);color:var(--s-ink);font-weight:600;font-size:.92rem;cursor:pointer;box-shadow:0 8px 24px rgba(0,0,0,.08),inset 0 1px 0 hsla(0,0%,100%,.7);transition:background .2s ease,transform .15s ease,border-color .2s ease}.seoart-cta:hover{background:hsla(0,0%,100%,.85);transform:translateY(-1px)}.seoart-cta--solid{background:rgba(11,11,10,.92);color:#fff;border-color:rgba(11,11,10,.92)}.seoart-cta--solid:hover{background:var(--s-ink-2);border-color:var(--s-ink-2)}.seoart-root a.seoart-cta{color:var(--s-ink)}.seoart-root a.seoart-cta--solid{color:#fff}.seoart-article{max-width:720px;margin:0 auto;padding:40px 24px 80px}.seoart-breadcrumb{color:var(--s-mute);font-size:.88rem;margin:0 0 12px;letter-spacing:.01em}.seoart-title{font-size:clamp(1.9rem,4.5vw,2.6rem);font-weight:800;letter-spacing:-.02em;line-height:1.2;margin:0 0 16px}.seoart-lead{font-size:1.18rem;line-height:1.7;color:var(--s-ink);font-weight:500;margin:0 0 30px;padding:0 0 26px;border-bottom:1px solid var(--s-line)}.seoart-article h2{font-size:clamp(1.3rem,3vw,1.6rem);font-weight:700;letter-spacing:-.01em;line-height:1.35;margin:38px 0 12px}.seoart-article p{font-size:1.06rem;line-height:1.85;color:var(--s-ink-2);margin:0 0 18px}.seoart-list{margin:6px 0 18px;padding:0 0 0 22px;list-style:disc}.seoart-list li{font-size:1.06rem;line-height:1.8;color:var(--s-ink-2);margin:0 0 10px;padding-left:4px}.seoart-list li::marker{color:var(--s-mute)}.seoart-price{display:flex;align-items:baseline;flex-wrap:wrap;gap:10px;margin:4px 0 10px}.seoart-price__big{font-size:clamp(1.5rem,3.6vw,1.9rem);font-weight:800;letter-spacing:-.02em;color:var(--s-ink)}.seoart-price__note{font-size:.95rem;color:var(--s-mute);line-height:1.6}.seoart-tip{margin:22px 0;padding:16px 18px;border-radius:14px;background:var(--s-soft);border:1px solid var(--s-line);font-size:1rem;line-height:1.7;color:var(--s-ink-2)}.seoart-faq{margin:8px 0 0}.seoart-faq__item{padding:18px 0;border-top:1px solid var(--s-line)}.seoart-faq__item:first-child{border-top:none;padding-top:6px}.seoart-faq__q{font-size:1.08rem;font-weight:700;letter-spacing:-.01em;color:var(--s-ink);margin:0 0 8px}.seoart-faq__a{font-size:1.02rem;line-height:1.8;color:var(--s-ink-2);margin:0}.seoart-book{margin:40px 0 8px;padding:28px 24px;border-radius:18px;border:1px solid var(--s-line);background:radial-gradient(120% 120% at 0 0,rgba(11,11,10,.04),hsla(0,0%,100%,0) 60%),#fff;text-align:center}.seoart-book__title{font-size:1.18rem;font-weight:700;letter-spacing:-.01em;margin:0 0 8px;color:var(--s-ink)}.seoart-book__desc{font-size:1rem;line-height:1.7;color:var(--s-mute);margin:0 0 18px}.seoart-foot{margin-top:44px;padding-top:28px;border-top:1px solid var(--s-line);display:flex;flex-wrap:wrap;gap:12px;align-items:center;justify-content:space-between}.seoart-foot__text{color:var(--s-mute);font-size:.96rem;line-height:1.6}.seoart-disclaimer{margin-top:28px;color:#9a9a94;font-size:.82rem;line-height:1.6;text-align:center}