:root {
  --bg: #0e1621;
  --card: #17212b;
  --line: #242f3d;
  --text: #e8eef4;
  --muted: #8b9aab;
  --accent: #2aabee;
  --accent2: #64b5f6;
}
* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; background: var(--bg); color: var(--text); font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Noto Sans SC", sans-serif; }
body { min-height: 100vh; }
a { color: var(--accent2); text-decoration: none; }
a:hover { text-decoration: underline; }
.wrap { max-width: 720px; margin: 0 auto; padding: 40px 20px 72px; }
.nav { display: flex; justify-content: space-between; gap: 12px; align-items: center; margin-bottom: 28px; font-size: 14px; color: var(--muted); }
.nav strong { color: var(--text); }
.mark { width: 64px; height: 64px; border-radius: 18px; background: linear-gradient(160deg, #2aabee, #1a7fb8); display: grid; place-items: center; font-size: 28px; margin-bottom: 18px; }
h1 { font-size: 30px; line-height: 1.25; margin: 0 0 10px; letter-spacing: -0.02em; }
.lead { color: var(--muted); font-size: 16px; line-height: 1.65; margin: 0 0 24px; }
.row { display: flex; flex-wrap: wrap; gap: 10px; margin-bottom: 32px; }
.btn { display: inline-block; padding: 12px 18px; border-radius: 12px; font-weight: 600; text-decoration: none !important; }
.btn-main { background: var(--accent); color: #fff; }
.btn-ghost { background: var(--card); color: var(--text); border: 1px solid var(--line); }
.grid { display: grid; gap: 12px; }
.card { background: var(--card); border: 1px solid var(--line); border-radius: 16px; padding: 18px; }
.card h2 { font-size: 17px; margin: 0 0 8px; }
.card p, .meta { margin: 0; color: var(--muted); font-size: 14px; line-height: 1.6; }
.meta { margin-bottom: 8px; }
article h2 { font-size: 20px; margin: 28px 0 10px; }
article p { font-size: 16px; line-height: 1.75; color: #d5dee8; }
article ul { color: #d5dee8; line-height: 1.7; padding-left: 1.2em; }
code { font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; color: #c5e4f7; }
.cta { background: var(--card); border: 1px solid var(--line); border-radius: 16px; padding: 16px 18px; margin: 28px 0; }
footer { margin-top: 40px; color: var(--muted); font-size: 13px; }