.purchase-page {
  color: #1e293b;
  font-family: inherit;
  font-size: 16px;
  line-height: 1.7;
}

.purchase-container {
  width: min(900px, calc(100% - 32px));
  margin: 0 auto;
}

.purchase-pricing {
  padding: 30px 0 25px;
}

.purchase-heading {
  margin-bottom: 24px;
}

.purchase-heading h1,
.purchase-heading h2 {
  margin: 0 0 8px;
  color: #0f172a;
  font-size: 28px;
  font-weight: 800;
  line-height: 1.35;
}

.purchase-heading p {
  margin: 0;
  color: #64748b;
  font-size: 16px;
}

.pricing-list {
  display: grid;
  gap: 14px;
}

.pricing-card {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 10px 20px;
  border: 1px solid #e2e8f0;
  border-radius: 12px;
  background: #fff;
}

.pricing-card h2 {
  margin: 0;
  font-size: 18px;
  font-weight: 750;
}

.pricing-card p {
  margin: 5px 0 0;
  color: #64748b;
  font-size: 15px;
  line-height: 1.5;
}

.pricing-card-featured {
  border-color: #93c5fd;
  background: #f8fbff;
}

.pricing-tag {
  position: absolute;
  top: -12px;
  right: 16px;
  padding: 2px 8px;
  border-radius: 20px;
  background: #2563eb;
  color: #fff;
  font-size: 10px;
  font-weight: 700;
}

.pricing-right {
  flex-shrink: 0;
  display: flex;
  align-items: flex-end;
  flex-direction: column;
  gap: 5px;
}

.pricing-right strong {
  color: #2563eb;
  font-size: 23px;
  line-height: 1.4;
  white-space: nowrap;
}

.pricing-right a {
  color: #2563eb;
  font-size: 15px;
  font-weight: 700;
  text-decoration: none;
}

.pricing-right a:hover {
  text-decoration: underline;
}

/* HƯỚNG DẪN */

.purchase-guide {
  padding: 24px 0 40px;
}

.guide-steps {
  display: grid;
  gap: 20px;
  margin-bottom: 28px;
}

.guide-step {
  display: flex;
  align-items: flex-start;
  gap: 15px;
}

.guide-step > span {
  display: flex;
  flex: 0 0 36px;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: #eff6ff;
  color: #2563eb;
  font-size: 16px;
  font-weight: 800;
}

.guide-step p {
  margin: 0;
  color: #475569;
  font-size: 16px;
  line-height: 1.7;
}

.guide-step strong {
  color: #1e293b;
  font-size: 17px;
}

/* QR THANH TOÁN */

.payment-card {
  padding: 28px 22px;
  border: 1px solid #e2e8f0;
  border-radius: 14px;
  background: #f8fafc;
  text-align: center;
}

.payment-card h3 {
  margin: 0;
  font-size: 22px;
  font-weight: 800;
}

.payment-desc {
  margin: 7px 0 20px;
  color: #64748b;
  font-size: 16px;
}

.payment-qr {
  display: block;
  width: min(290px, 100%);
  height: auto;
  margin: 0 auto 18px;
  padding: 8px;
  border: 1px solid #e2e8f0;
  border-radius: 10px;
  background: #fff;
}

.payment-contact {
  padding-top: 20px;
  border-top: 1px solid #e2e8f0;
}

.payment-contact > strong {
  display: block;
  margin-bottom: 14px;
  font-size: 16px;
}

.contact-buttons {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 12px;
}

.contact-buttons a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 11px 22px;
  border-radius: 8px;
  font-size: 15px;
  font-weight: 700;
  text-decoration: none;
}

.contact-zalo {
  background: #e8f3ff;
  color: #0875df;
}

.contact-facebook {
  background: #1877f2;
  color: #fff;
}

.contact-zalo:hover {
  background: #d7eaff;
}

.contact-facebook:hover {
  background: #1265d3;
}

/* FAQ */

.purchase-faq {
  padding: 22px 0 52px;
}

.faq-list {
  display: grid;
  gap: 12px;
}

.faq-item {
  overflow: hidden;
  border: 1px solid #e2e8f0;
  border-radius: 12px;
  background: #fff;
}

.faq-item summary {
  position: relative;
  padding: 18px 48px 18px 18px;
  color: #1e293b;
  font-size: 16px;
  font-weight: 700;
  line-height: 1.6;
  cursor: pointer;
  list-style: none;
}

.faq-item summary::-webkit-details-marker {
  display: none;
}

.faq-item summary::after {
  position: absolute;
  top: 50%;
  right: 18px;
  color: #2563eb;
  font-size: 24px;
  font-weight: 400;
  content: "+";
  transform: translateY(-50%);
}

.faq-item[open] summary::after {
  content: "−";
}

.faq-item > p {
  margin: 0;
  padding: 0 18px 18px;
  color: #64748b;
  font-size: 15px;
  line-height: 1.75;
}

/* ĐIỆN THOẠI */

@media (max-width: 480px) {
  .purchase-container {
    width: calc(100% - 28px);
  }

  .purchase-pricing {
    padding-top: 26px;
  }

  .purchase-heading h1,
  .purchase-heading h2 {
    font-size: 25px;
  }

  .purchase-heading p {
    font-size: 15px;
  }

  .pricing-card {
    padding: 18px 12px;
    gap: 8px;
  }

  .pricing-card h2 {
    font-size: 16px;
  }

  .pricing-card p {
    font-size: 13px;
  }

  .pricing-right strong {
    font-size: 19px;
  }

  .pricing-right a {
    font-size: 14px;
  }

  .guide-step p {
    font-size: 15px;
  }

  .guide-step strong {
    font-size: 16px;
  }

  .payment-card {
    padding: 22px 14px;
  }

  .payment-card h3 {
    font-size: 20px;
  }

  .payment-desc {
    font-size: 15px;
  }

  .contact-buttons {
    flex-direction: column;
  }

  .contact-buttons a {
    width: 100%;
  }

  .faq-item summary {
    padding: 16px 42px 16px 14px;
    font-size: 15px;
  }

  .faq-item > p {
    padding: 0 14px 16px;
    font-size: 14px;
  }
}