/* BudgetLoop 门户基础样式——UI 定稿后整体替换即可 */
:root {
  --ink: #1a1d23;
  --muted: #6b7280;
  --accent: #3b82f6;
  --bg: #ffffff;
  --card: #f6f7f9;
}
* { box-sizing: border-box; margin: 0; }
body { font-family: -apple-system, "Segoe UI", sans-serif; color: var(--ink); background: var(--bg); line-height: 1.6; }
a { color: var(--accent); text-decoration: none; }

.nav { display: flex; justify-content: space-between; align-items: center; padding: 1rem 6vw; }
.nav .brand { font-weight: 700; font-size: 1.2rem; }
.nav nav a { margin-left: 1.5rem; color: var(--ink); }

.hero { text-align: center; padding: 14vh 6vw 10vh; }
.hero h1 { font-size: clamp(2rem, 5vw, 3.4rem); margin-bottom: 1rem; }
.hero p { color: var(--muted); max-width: 40rem; margin: 0 auto 1.5rem; }

.btn { display: inline-block; padding: 0.75rem 1.75rem; border-radius: 999px; font-weight: 600; }
.btn.primary { background: var(--accent); color: #fff; }

.features { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 1.25rem; padding: 4vh 6vw; }
.card { background: var(--card); border-radius: 16px; padding: 1.5rem; }
.card h3 { margin-bottom: 0.5rem; }
.card p { color: var(--muted); }

.pricing, .beta { text-align: center; padding: 6vh 6vw; }
.muted { color: var(--muted); }

footer { text-align: center; padding: 3rem 6vw; color: var(--muted); font-size: 0.9rem; }