* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { font-family: system-ui, -apple-system, sans-serif; background: #05070d; color: #d5d9e2; min-height: 100vh; overflow-x: hidden; line-height: 1.7; }

header { position: fixed; top: 0; left: 0; right: 0; z-index: 100; display: flex; align-items: center; justify-content: space-between; padding: 0 24px; height: 56px; background: rgba(5,7,13,0.92); backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px); border-bottom: 1px solid rgba(255,255,255,0.06); }
.logo { font-size: 17px; font-weight: 700; color: #fff; letter-spacing: -0.3px; text-decoration: none; }
.logo span { background: linear-gradient(135deg, #4488ff, #aa66ff); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
.header-right { display: flex; align-items: center; gap: 8px; }
.btn { display: inline-flex; align-items: center; gap: 6px; padding: 8px 18px; border-radius: 10px; background: linear-gradient(135deg, #4488ff, #7a5cff); color: #fff; text-decoration: none; font-size: 14px; font-weight: 500; transition: transform .15s, box-shadow .15s; box-shadow: 0 4px 18px rgba(68,136,255,0.25); }
.btn:hover { transform: translateY(-1px); box-shadow: 0 6px 24px rgba(122,92,255,0.35); }
.btn-ghost { background: transparent; border: 1px solid rgba(255,255,255,0.15); color: #bbb; box-shadow: none; }
.btn-ghost:hover { color: #fff; border-color: rgba(255,255,255,0.35); }

.wrap { max-width: 820px; margin: 0 auto; padding: 96px 24px 40px; }

.breadcrumb { font-size: 13px; color: #6b7488; margin-bottom: 22px; }
.breadcrumb a { color: #7f9cf5; text-decoration: none; }
.breadcrumb a:hover { text-decoration: underline; }

.article h1 { font-size: clamp(28px, 5vw, 42px); line-height: 1.12; font-weight: 800; letter-spacing: -0.02em; color: #fff; margin-bottom: 14px; }
.article .lead { font-size: 17px; color: #aeb6c6; margin-bottom: 26px; }
.article .meta { font-size: 13px; color: #6b7488; border-bottom: 1px solid rgba(255,255,255,0.07); padding-bottom: 18px; margin-bottom: 28px; }
.article h2 { font-size: clamp(20px, 3.2vw, 26px); color: #fff; letter-spacing: -0.02em; margin: 34px 0 12px; }
.article h3 { font-size: 18px; color: #e7ebf3; margin: 24px 0 10px; }
.article p { font-size: 15.5px; color: #b9c0cf; margin-bottom: 16px; }
.article ul, .article ol { margin: 0 0 18px 22px; }
.article li { font-size: 15px; color: #b9c0cf; margin-bottom: 8px; }
.article strong { color: #e7ebf3; font-weight: 600; }
.article a.inline { color: #7f9cf5; text-decoration: none; border-bottom: 1px solid rgba(127,156,245,0.4); }
.article a.inline:hover { border-bottom-color: #7f9cf5; }
.article .term { display: inline-block; padding: 2px 10px; border-radius: 14px; background: rgba(68,136,255,0.1); border: 1px solid rgba(68,136,255,0.25); color: #9cc2ff; font-size: 12px; margin: 2px 3px 2px 0; }

.cta-box { margin: 34px 0; padding: 28px; border-radius: 16px; background: linear-gradient(180deg, rgba(122,92,255,0.10), rgba(68,136,255,0.06)); border: 1px solid rgba(122,92,255,0.3); text-align: center; }
.cta-box h3 { color: #fff; font-size: 19px; margin: 0 0 8px; }
.cta-box p { color: #9aa3b5; font-size: 14px; margin: 0 0 18px; }

.related { margin-top: 44px; padding-top: 28px; border-top: 1px solid rgba(255,255,255,0.07); }
.related h3 { color: #fff; font-size: 18px; margin-bottom: 16px; }
.related a { display: block; padding: 14px 16px; border-radius: 12px; background: rgba(255,255,255,0.03); border: 1px solid rgba(255,255,255,0.07); color: #cfd6e4; text-decoration: none; margin-bottom: 10px; transition: border-color .2s, transform .2s; }
.related a:hover { border-color: rgba(122,92,255,0.4); transform: translateY(-2px); }
.related a b { color: #fff; display: block; margin-bottom: 2px; font-size: 15px; }
.related a span { font-size: 13px; color: #8b94a6; }

footer { text-align: center; padding: 32px 24px; font-size: 12px; color: #4d5668; border-top: 1px solid rgba(255,255,255,0.05); }
footer a { color: #4d5668; text-decoration: none; }
footer a:hover { color: #8b94a6; }

/* Hub page */
.hub-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 16px; margin-top: 24px; }
.hub-card { display: block; text-decoration: none; color: inherit; background: rgba(255,255,255,0.03); border: 1px solid rgba(255,255,255,0.07); border-radius: 14px; padding: 22px; transition: border-color .2s, transform .2s; }
.hub-card:hover { border-color: rgba(122,92,255,0.4); transform: translateY(-2px); }
.hub-card .icon { font-size: 22px; margin-bottom: 10px; }
.hub-card strong { display: block; color: #fff; font-size: 16px; margin-bottom: 8px; }
.hub-card span { font-size: 13px; color: #8b94a6; line-height: 1.6; display: block; }

@media (max-width: 600px) {
  .wrap { padding-top: 84px; }
  .header-right .btn-ghost { display: none; }
}