*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
body { font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif; background: #f9fafb; color: #111827; line-height: 1.75; }
.nav { background: white; border-bottom: 1px solid #e5e7eb; padding: 14px 24px; display: flex; align-items: center; gap: 16px; position: sticky; top: 0; z-index: 10; }
.nav-brand { font-weight: 800; font-size: 18px; color: #E8401C; text-decoration: none; display: flex; align-items: center; gap: 8px; }
.nav a.back { color: #6b7280; font-size: 13px; text-decoration: none; }
.nav a.back:hover { color: #111; }
.lang-switch { margin-left: auto; display: flex; gap: 10px; }
.lang-switch a { font-size: 12px; color: #9ca3af; text-decoration: none; text-transform: uppercase; letter-spacing: .04em; }
.lang-switch a:hover { color: #111; }
.lang-switch a.active { color: #E8401C; font-weight: 700; }
.hero { background: white; border-bottom: 1px solid #e5e7eb; padding: 56px 24px 48px; }
.hero-inner { max-width: 720px; margin: 0 auto; }
.tag { display: inline-block; background: #FEF3C7; color: #92400E; font-size: 11px; font-weight: 700; letter-spacing: .06em; text-transform: uppercase; border-radius: 20px; padding: 3px 10px; margin-bottom: 20px; }
h1 { font-size: clamp(24px, 4vw, 36px); font-weight: 800; letter-spacing: -.02em; line-height: 1.2; margin-bottom: 20px; color: #111827; }
.byline { font-size: 13px; color: #9ca3af; }
.byline strong { color: #6b7280; }
.article { max-width: 720px; margin: 0 auto; padding: 48px 24px 96px; }
p { font-size: 16px; color: #374151; margin-bottom: 20px; }
h2 { font-size: 21px; font-weight: 700; color: #111827; margin: 48px 0 16px; letter-spacing: -.01em; }
h3 { font-size: 16px; font-weight: 700; color: #374151; margin: 28px 0 10px; }
ul, ol { font-size: 16px; color: #374151; margin: 0 0 20px 22px; }
li { margin-bottom: 8px; }
a { color: #E8401C; }
code { background: #F3F4F6; border-radius: 4px; padding: 1px 6px; font-size: 14px; font-family: 'SF Mono', Menlo, monospace; color: #374151; }
.callout { background: #EFF6FF; border: 1px solid #BFDBFE; border-radius: 10px; padding: 18px 20px; margin: 32px 0; }
.callout p { margin: 0; font-size: 15px; color: #1e3a5f; }
.callout strong { color: #1d4ed8; }
.problem-box { background: #FEF2F2; border: 1px solid #FECACA; border-radius: 10px; padding: 18px 20px; margin: 32px 0; }
.problem-box p { margin: 0; font-size: 15px; color: #7f1d1d; }
.faq { margin: 48px 0 0; }
.faq h2 { font-size: 22px; margin: 0 0 12px; }
.faq-item { border-top: 1px solid #E5E7EB; padding: 18px 0; }
.faq-item h3 { font-size: 17px; margin: 0 0 8px; color: #111827; }
.faq-item p { margin: 0; font-size: 15px; color: #374151; line-height: 1.6; }
.cmp { width: 100%; border-collapse: collapse; margin: 22px 0; font-size: 14px; }
.cmp th, .cmp td { text-align: left; padding: 10px 12px; border-bottom: 1px solid #E5E7EB; vertical-align: top; }
.cmp thead th { font-size: 13px; color: #111827; border-bottom: 2px solid #E5E7EB; }
.cmp td:first-child, .cmp th:first-child { font-weight: 600; }
.cmp td:nth-child(2) { color: #E8401C; font-weight: 600; }
.cmp tbody tr:hover { background: #FafBFC; }
.related { margin: 44px 0 0; }
.related h2 { font-size: 20px; margin: 0 0 12px; }
.related ul { list-style: none; padding: 0; margin: 0; display: flex; flex-wrap: wrap; gap: 10px; }
.related a { display: inline-block; background: #F3F4F6; border: 1px solid #E5E7EB; border-radius: 22px; padding: 8px 16px; font-size: 14px; color: #E8401C; text-decoration: none; font-weight: 600; }
.related a:hover { border-color: #E8401C; }
.cta-box { background: #E8401C; border-radius: 14px; padding: 36px 32px; margin: 56px 0 0; text-align: center; }
.cta-box h3 { color: white; font-size: 20px; margin: 0 0 8px; }
.cta-box p { color: rgba(255,255,255,.8); font-size: 15px; margin: 0 0 24px; }
.cta-btn { display: inline-flex; align-items: center; gap: 8px; background: white; color: #E8401C; font-weight: 700; font-size: 15px; border-radius: 24px; padding: 12px 28px; text-decoration: none; transition: opacity .15s; }
.cta-btn:hover { opacity: .9; color: #E8401C; }
footer { text-align: center; padding: 32px 24px; font-size: 12px; color: #9ca3af; border-top: 1px solid #e5e7eb; }
footer a { color: #9ca3af; text-decoration: none; }
figure.fig { margin: 36px 0; }
figure.fig svg, figure.fig video { width: 100%; height: auto; display: block; border-radius: 14px; border: 1px solid #1f2c38; background: #0f1620; }
figure.fig figcaption { font-size: 13px; color: #6b7280; text-align: center; margin-top: 10px; line-height: 1.5; }
.blog-list { max-width: 720px; margin: 0 auto; padding: 40px 24px 96px; }
.post-card { display: block; background: #fff; border: 1px solid #e5e7eb; border-radius: 12px; padding: 22px 24px; margin-bottom: 16px; text-decoration: none; transition: box-shadow .15s, transform .15s; }
.post-card:hover { box-shadow: 0 6px 18px rgba(0,0,0,.08); transform: translateY(-1px); }
.post-card h2 { margin: 6px 0 8px; font-size: 20px; }
.post-card p { margin: 0; font-size: 15px; color: #6b7280; }
.post-meta { font-size: 12px; color: #9ca3af; }