* { box-sizing: border-box; }
body { margin: 0; font-family: -apple-system, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif; color: #222; background: #f7f7f7; line-height: 1.7; }
a { color: #0b5fff; text-decoration: none; }
header { background: #fff; border-bottom: 1px solid #eee; }
.nav { max-width: 760px; margin: 0 auto; padding: 14px 16px; display: flex; gap: 18px; align-items: center; flex-wrap: wrap; }
.nav .brand { font-weight: 700; font-size: 18px; color: #222; }
main { max-width: 760px; margin: 0 auto; padding: 20px 16px 60px; }
.card { background: #fff; border: 1px solid #eee; border-radius: 10px; padding: 16px; margin-bottom: 14px; }
h1 { font-size: 24px; margin: 6px 0 8px; }
h2 { font-size: 19px; margin: 26px 0 10px; }
.meta { color: #888; font-size: 13px; }
.content { word-break: break-word; }
input, textarea, select { width: 100%; padding: 10px; margin: 6px 0 12px; border: 1px solid #ddd; border-radius: 8px; font-size: 15px; font-family: inherit; }
textarea { min-height: 130px; }
button { background: #0b5fff; color: #fff; border: 0; border-radius: 8px; padding: 10px 18px; font-size: 15px; cursor: pointer; }
button.secondary { background: #eee; color: #333; }
button.danger { background: #fff; color: #d33; border: 1px solid #e8b4b4; padding: 4px 10px; font-size: 13px; }
.tab { display: inline-block; padding: 6px 14px; border: 1px solid #ddd; border-radius: 20px; margin: 0 6px 8px 0; cursor: pointer; background: #fff; }
.tab.active { background: #0b5fff; color: #fff; border-color: #0b5fff; }
.error { color: #d33; }
.ok { color: #1a7f37; }
.row { display: flex; justify-content: space-between; gap: 12px; align-items: baseline; }