.oem-audio-sop {
  max-width: 1160px;
  margin: 0 auto;
  padding: 30px 18px;
  color: #202020;
  font-family: Arial, Helvetica, sans-serif;
  line-height: 1.72;
}

.oem-audio-sop h1 {
  font-size: 44px;
  line-height: 1.15;
  color: #111;
  margin: 0 0 16px;
}

.oem-audio-sop h2 {
  font-size: 30px;
  color: #111;
  margin: 44px 0 16px;
}

.oem-audio-sop h3 {
  font-size: 22px;
  color: #111;
  margin: 26px 0 10px;
}

.oem-audio-sop p,
.oem-audio-sop li,
.oem-audio-sop td {
  font-size: 16px;
}

.oem-audio-sop a {
  color: #d71920;
  font-weight: 700;
  text-decoration: none;
}

.oas-hero {
  background: #111;
  color: #fff;
  border-radius: 30px;
  padding: 42px 34px;
  margin-bottom: 32px;
}

.oas-hero h1 {
  color: #fff;
}

.oas-hero p {
  max-width: 900px;
  color: #f2f2f2;
  font-size: 17px;
}

.oas-label {
  display: inline-block;
  background: #d71920;
  color: #fff;
  padding: 7px 14px;
  border-radius: 999px;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .04em;
  text-transform: uppercase;
  margin-bottom: 18px;
}

.oas-answer {
  display: grid;
  grid-template-columns: 1.15fr .85fr;
  gap: 22px;
  margin: 30px 0;
}

.oas-answer-main {
  background: #fff5f5;
  border-left: 5px solid #d71920;
  border-radius: 0 22px 22px 0;
  padding: 24px;
}

.oas-answer-side {
  background: #f6f6f6;
  border: 1px solid #e6e6e6;
  border-radius: 22px;
  padding: 24px;
}

.oas-fact-strip {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 14px;
  margin: 30px 0;
}

.oas-fact {
  background: #fff;
  border: 1px solid #e7e7e7;
  border-radius: 18px;
  padding: 18px;
  box-shadow: 0 10px 24px rgba(0,0,0,0.04);
}

.oas-fact strong {
  display: block;
  color: #111;
  font-size: 17px;
  margin-bottom: 6px;
}

.oas-flow {
  counter-reset: step;
  margin: 30px 0;
}

.oas-step {
  display: grid;
  grid-template-columns: 96px 1fr;
  gap: 20px;
  background: #fff;
  border: 1px solid #e8e8e8;
  border-radius: 24px;
  padding: 24px;
  margin: 18px 0;
}

.oas-step-num {
  width: 72px;
  height: 72px;
  border-radius: 22px;
  background: #111;
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 28px;
  font-weight: 800;
}

.oas-step h3 {
  margin-top: 0;
}

.oas-table {
  width: 100%;
  border-collapse: collapse;
  margin: 24px 0;
  border-radius: 18px;
  overflow: hidden;
}

.oas-table th {
  background: #111;
  color: #fff;
  padding: 15px;
  text-align: left;
  font-size: 15px;
}

.oas-table td {
  border: 1px solid #e5e5e5;
  padding: 15px;
  vertical-align: top;
}

.oas-table tr:nth-child(even) td {
  background: #fafafa;
}

.oas-decision {
  background: #f6f6f6;
  border-radius: 28px;
  padding: 30px;
  margin: 42px 0;
}

.oas-decision-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
  margin-top: 20px;
}

.oas-card {
  background: #fff;
  border: 1px solid #e7e7e7;
  border-radius: 18px;
  padding: 22px;
}

.oas-card strong {
  display: block;
  font-size: 18px;
  color: #111;
  margin-bottom: 8px;
}

.oas-dark {
  background: #111;
  color: #fff;
  border-radius: 28px;
  padding: 32px;
  margin: 42px 0;
}

.oas-dark h2 {
  color: #fff;
  margin-top: 0;
}

.oas-dark p,
.oas-dark li {
  color: #f2f2f2;
}

.oas-brief {
  background: #fff;
  color: #202020;
  border: 2px dashed #d71920;
  border-radius: 22px;
  padding: 22px;
  margin-top: 18px;
}

.oas-product {
  background: #f6f6f6;
  border-radius: 28px;
  padding: 30px;
  margin: 42px 0;
}

.oas-links {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 14px;
  margin-top: 18px;
}

.oas-links a {
  display: block;
  background: #fff;
  border: 1px solid #e6e6e6;
  border-radius: 15px;
  padding: 15px;
}

.oas-cta {
  text-align: center;
  background: linear-gradient(135deg, #111 0%, #303030 58%, #d71920 135%);
  color: #fff;
  border-radius: 30px;
  padding: 38px 28px;
  margin: 46px 0;
}

.oas-cta h2 {
  color: #fff;
  margin-top: 0;
}

.oas-cta p {
  color: #f2f2f2;
  max-width: 820px;
  margin-left: auto;
  margin-right: auto;
}

.oas-cta a {
  display: inline-block;
  background: #fff;
  color: #111;
  padding: 13px 28px;
  border-radius: 999px;
  margin-top: 12px;
}

.oas-faq details {
  border: 1px solid #e5e5e5;
  border-radius: 16px;
  padding: 16px 18px;
  margin: 12px 0;
  background: #fff;
}

.oas-faq summary {
  cursor: pointer;
  font-weight: 800;
  color: #111;
}

@media (max-width: 768px) {
  .oem-audio-sop {
    padding: 22px 14px;
  }

  .oem-audio-sop h1 {
    font-size: 30px;
  }

  .oem-audio-sop h2 {
    font-size: 24px;
  }

  .oas-hero,
  .oas-decision,
  .oas-dark,
  .oas-product,
  .oas-cta {
    padding: 24px 18px;
  }

  .oas-answer,
  .oas-fact-strip,
  .oas-step,
  .oas-decision-grid,
  .oas-links {
    grid-template-columns: 1fr;
  }

  .oas-table,
  .oas-table tbody,
  .oas-table tr,
  .oas-table td,
  .oas-table th {
    display: block;
    width: 100%;
  }

  .oas-table th {
    display: none;
  }
}