.page-khuyen-mai__hero-section { padding-top: 10px; max-width: 1200px; margin: 0 auto; }
.page-khuyen-mai__hero-image { margin-bottom: 20px; text-align: center; }
.page-khuyen-mai__hero-img { width: 100%; max-width: 1020px; height: auto; aspect-ratio: 17/5; object-fit: cover; border-radius: 16px; display: inline-block; }
.page-khuyen-mai__hero-content { text-align: center; padding: 0 16px; }
.page-khuyen-mai__hero-content h1 { font-size: clamp(1.8rem, 4vw, 3rem); font-weight: 800; color: #0b3158; line-height: 1.2; margin: 10px 0; max-width: 900px; margin-left: auto; margin-right: auto; }
.page-khuyen-mai__hero-desc { color: #4a5568; font-size: 1.1rem; line-height: 1.6; max-width: 750px; margin: 0 auto 24px; }
.page-khuyen-mai__hero-actions { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }
.page-khuyen-mai__btn { display: inline-block; padding: 14px 32px; border-radius: 40px; font-weight: 700; text-decoration: none; transition: transform 0.2s ease, box-shadow 0.2s ease; box-sizing: border-box; }
.page-khuyen-mai__btn--primary { background: #26A9E0; color: #ffffff; box-shadow: 0 4px 15px rgba(38, 169, 224, 0.3); border: 2px solid #26A9E0; }
.page-khuyen-mai__btn--primary:hover { transform: translateY(-2px); box-shadow: 0 8px 25px rgba(38, 169, 224, 0.4); }
.page-khuyen-mai__btn--secondary { background: #ffffff; color: #26A9E0; border: 2px solid #26A9E0; }
.page-khuyen-mai__btn--secondary:hover { background: #f0f8fe; transform: translateY(-2px); }

.page-khuyen-mai__promo-section { max-width: 1200px; margin: 50px auto; padding: 0 16px; }
.page-khuyen-mai__section-title { text-align: center; color: #0b3158; font-size: 2rem; font-weight: 800; margin-bottom: 16px; }
.page-khuyen-mai__section-desc { text-align: center; color: #4a5568; max-width: 700px; margin: 0 auto 40px; }
.page-khuyen-mai__promo-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(320px, 1fr)); gap: 32px; }
.page-khuyen-mai__promo-card { background: #ffffff; border-radius: 16px; box-shadow: 0 4px 20px rgba(0,0,0,0.08); overflow: hidden; transition: transform 0.3s ease; }
.page-khuyen-mai__promo-card:hover { transform: translateY(-6px); }
.page-khuyen-mai__promo-img { width: 100%; height: auto; aspect-ratio: 2/1; object-fit: cover; display: block; }
.page-khuyen-mai__promo-body { padding: 24px; }
.page-khuyen-mai__promo-tag { display: inline-block; background: #17a2b8; color: #ffffff; font-size: 0.85rem; font-weight: 700; padding: 4px 14px; border-radius: 24px; letter-spacing: 1px; text-transform: uppercase; margin-bottom: 14px; }
.page-khuyen-mai__promo-title { font-size: 1.3rem; font-weight: 700; color: #0b3158; line-height: 1.3; margin-bottom: 12px; }
.page-khuyen-mai__promo-desc { color: #4a5568; font-size: 0.95rem; line-height: 1.6; margin-bottom: 16px; }
.page-khuyen-mai__promo-list { list-style: disc; padding-left: 20px; color: #555; margin-bottom: 20px; }
.page-khuyen-mai__promo-list li { margin-bottom: 6px; }
.page-khuyen-mai__promo-btn { display: inline-block; background: #EA7C07; color: #ffffff; padding: 12px 28px; border-radius: 30px; font-weight: 600; text-decoration: none; transition: background-color 0.3s ease; }
.page-khuyen-mai__promo-btn:hover { background: #d16e0a; }

.page-khuyen-mai__guide-section { background: #f5f8fb; padding: 50px 16px; }
.page-khuyen-mai__guide-inner { max-width: 1000px; margin: 0 auto; }
.page-khuyen-mai__guide-title { text-align: center; color: #0b3158; font-size: 2rem; font-weight: 800; margin-bottom: 12px; }
.page-khuyen-mai__guide-desc { text-align: center; color: #4a5568; margin-bottom: 32px; }
.page-khuyen-mai__guide-steps { max-width: 800px; margin: 0 auto; }
.page-khuyen-mai__guide-step { background: #ffffff; border: 1px solid #e2e8f0; border-radius: 12px; margin-bottom: 12px; overflow: hidden; }
.page-khuyen-mai__guide-summary, .page-khuyen-mai__guide-step > summary { padding: 18px 24px; cursor: pointer; font-weight: 700; color: #0b3158; background: #ffffff; border-radius: 11px; list-style: none; position: relative; padding-left: 50px; }
.page-khuyen-mai__guide-step > summary::before { content: '+'; position: absolute; left: 18px; top: 50%; transform: translateY(-50%); font-size: 1.5rem; color: #26A9E0; font-weight: 400; }
.page-khuyen-mai__guide-step[open] > summary::before { content: '−'; }
.page-khuyen-mai__guide-step[open] > summary { border-bottom: 1px solid #f0f4f8; border-radius: 11px 11px 0 0; }
.page-khuyen-mai__guide-content { padding: 18px 24px; color: #4a5568; line-height: 1.7; border-top: 1px solid #f0f4f8; }
.page-khuyen-mai__guide-cta { text-align: center; margin-top: 32px; }

@media (max-width: 768px) {
  .page-khuyen-mai__hero-image { margin-bottom: 12px; }
  .page-khuyen-mai__hero-img { aspect-ratio: 2/1; }
  .page-khuyen-mai__hero-content h1 { font-size: clamp(1.6rem, 8vw, 2.6rem); padding: 0 4px; }
  .page-khuyen-mai__hero-desc { font-size: 0.95rem; padding: 0 8px; }
  .page-khuyen-mai__hero-actions { gap: 10px; }
  .page-khuyen-mai__btn { padding: 12px 26px; font-size: 0.95rem; max-width: 100%; box-sizing: border-box; white-space: normal; word-wrap: break-word; }
  .page-khuyen-mai__promo-grid { grid-template-columns: 1fr; }
  .page-khuyen-mai__promo-body { padding: 20px; }
  .page-khuyen-mai__promo-btn { max-width: 100%; box-sizing: border-box; white-space: normal; word-wrap: break-word; }
  .page-khuyen-mai__guide-section { padding: 40px 12px; }
  .page-khuyen-mai__guide-title { font-size: 1.6rem; }
  .page-khuyen-mai__guide-content { padding: 14px 18px; }
  .page-khuyen-mai__btn--secondary { padding: 12px 22px; }
  .page-khuyen-mai img { max-width: 100% !important; height: auto !important; }
  .page-khuyen-mai { overflow-x: hidden; max-width: 100%; }
}