* { box-sizing: border-box; margin: 0; padding: 0; }
body { font-family: "Segoe UI", system-ui, sans-serif; color: #24313f; background: #f6f8fa; line-height: 1.55; }
.top { display: flex; justify-content: space-between; align-items: center; padding: 14px 28px; background: #fff; border-bottom: 1px solid #e3e8ee; position: sticky; top: 0; }
.logo a { text-decoration: none; color: inherit; font-weight: 700; font-size: 20px; }
.logo span { color: #2f7d5c; }
nav a { margin-left: 18px; color: #4a5a6a; text-decoration: none; font-size: 15px; }
nav a:hover, footer a:hover { color: #2f7d5c; }
main { max-width: 720px; margin: 40px auto; padding: 0 20px; background: #fff; border-radius: 12px; padding: 36px 40px; box-shadow: 0 1px 4px rgba(20,40,60,.08); }
h1 { font-size: 28px; margin-bottom: 16px; color: #1c2a38; }
h2 { font-size: 20px; margin: 22px 0 10px; }
.lead { font-size: 17px; color: #44556a; margin-bottom: 18px; }
p { margin-bottom: 12px; }
ul, ol { margin: 0 0 14px 22px; }
li { margin-bottom: 8px; }
.features li b { color: #2f7d5c; }
.note { font-size: 14px; color: #6b7a89; border-top: 1px solid #edf1f5; padding-top: 14px; margin-top: 18px; }
footer { text-align: center; padding: 22px; font-size: 14px; color: #6b7a89; }
footer a { color: #4a5a6a; text-decoration: none; margin: 0 6px; }