:root { --chinh: #1f5eff; --chu: #0f172a; --phu: #475569; --nen: #f8fafc; --vien: #e2e8f0; }
* { box-sizing: border-box; }
body { margin: 0; font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif; color: var(--chu); background: var(--nen); }
header { display: flex; justify-content: space-between; align-items: center; padding: 16px; max-width: 1040px; margin: 0 auto; }
.logo { font-weight: 700; font-size: 20px; color: var(--chinh); }
main { max-width: 1040px; margin: 0 auto; padding: 48px 16px; }
h1 { font-size: clamp(28px, 5vw, 44px); line-height: 1.15; margin: 0 0 16px; max-width: 760px; }
.mo-ta { font-size: 18px; color: var(--phu); max-width: 680px; line-height: 1.6; }
.hanh-dong { display: flex; flex-wrap: wrap; gap: 12px; margin: 28px 0 40px; }
.nut { display: inline-flex; align-items: center; min-height: 44px; padding: 0 20px; border-radius: 8px; background: var(--chinh); color: #fff;
       font-weight: 600; text-decoration: none; }
.nut.phu { background: #fff; color: var(--chu); border: 1px solid var(--vien); }
.diem { list-style: none; padding: 0; display: grid; gap: 12px; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); }
.diem li { background: #fff; border: 1px solid var(--vien); border-radius: 10px; padding: 16px; color: var(--phu); line-height: 1.5; }
.diem b { display: block; color: var(--chu); margin-bottom: 4px; }
footer { max-width: 1040px; margin: 0 auto; padding: 24px 16px 40px; color: var(--phu); font-size: 14px; }