:root {
  --ho-tro-nen: #f4f8fa;
  --ho-tro-chu: #172b35;
  --ho-tro-phu: #657780;
  --ho-tro-xanh: #087e8b;
}
* { box-sizing: border-box; }
body { margin: 0; color: var(--ho-tro-chu); background: var(--ho-tro-nen); font-family: "Segoe UI", Tahoma, sans-serif; }
.ho-tro-noi-dung a, .ho-tro-chan a { color: var(--ho-tro-xanh); text-decoration: none; }
.ho-tro-noi-dung a:hover, .ho-tro-chan a:hover { text-decoration: underline; }
.ho-tro-dau { background: rgba(18, 11, 36, 0.94); border-bottom: 1px solid rgba(168, 85, 247, 0.25); box-shadow: 0 8px 30px rgba(18, 7, 34, 0.35); }
.ho-tro-dau-ben-trong { display: flex; align-items: center; justify-content: space-between; gap: 24px; width: min(1080px, calc(100% - 36px)); min-height: 82px; margin: auto; }
.ho-tro-logo { display: inline-flex; align-items: center; gap: 12px; color: #ffffff; font-size: 1.08rem; font-weight: 900; letter-spacing: .01em; white-space: nowrap; }
.ho-tro-logo:hover { text-decoration: none; }
.ho-tro-logo img { display: block; width: 78px; height: 44px; object-fit: cover; border-radius: 9px; box-shadow: 0 4px 12px rgba(24, 11, 42, 0.3); }
.ho-tro-nav { display: flex; flex-wrap: wrap; gap: 20px; color: #cbd5e1; font-weight: 650; }
.ho-tro-nav a { color: #cbd5e1; }
.ho-tro-nav a:hover { color: #ffffff; }
.ho-tro-noi-dung { width: min(820px, calc(100% - 36px)); margin: 54px auto; padding: clamp(24px, 5vw, 44px); background: #fff; border: 1px solid #dce8eb; border-radius: 18px; box-shadow: 0 16px 40px #17333d12; }
.ho-tro-nhan { margin: 0 0 10px; color: var(--ho-tro-xanh); font-size: .78rem; font-weight: 800; letter-spacing: .16em; }
.ho-tro-noi-dung h1 { margin: 0 0 18px; font-size: clamp(1.9rem, 4vw, 2.7rem); }
.ho-tro-noi-dung h2 { margin: 28px 0 10px; font-size: 1.2rem; }
.ho-tro-noi-dung p, .ho-tro-noi-dung li { color: #475467; line-height: 1.75; }
.ho-tro-noi-dung li { margin: 7px 0; }
.ho-tro-nut { display: inline-block; margin-top: 14px; padding: 12px 18px; color: #fff !important; background: var(--ho-tro-xanh); border-radius: 9px; font-weight: 750; }
.ho-tro-nut:hover { color: #fff !important; background: #075c69; text-decoration: none; }
.ho-tro-lien-he { margin-top: 24px; padding: 16px 18px; background: #eef7f7; border-radius: 12px; }
.ho-tro-chan { padding: 18px; color: var(--ho-tro-phu); text-align: center; }
@media (max-width: 580px) { .ho-tro-dau-ben-trong { align-items: flex-start; flex-direction: column; padding: 14px 0; gap: 12px; } .ho-tro-nav { gap: 12px; } .ho-tro-noi-dung { margin: 28px auto; } }