.s1800-detail {
  width: 100%;
  max-width: 1400px;
  margin: 0 auto;
  padding: 15px 10px 50px;
  box-sizing: border-box;
  color: #263746;
  font-family: Arial, Helvetica, sans-serif;
  background: #fff;
  line-height: 1.7;
}
.s1800-detail * {
  box-sizing: border-box;
}
.s1800-detail h2,
.s1800-detail h3,
.s1800-detail p {
  margin-top: 0;
}
.s1800-detail h2 {
  margin-bottom: 12px;
  color: #263746;
  font-size: 27px;
  line-height: 1.3;
  font-weight: 700;
}
.s1800-detail h3 {
  color: #263746;
  font-size: 17px;
  line-height: 1.4;
  font-weight: 700;
}
.s1800-detail p {
  color: #64717d;
  font-size: 15px;
}
.s1800-detail .section-heading {
  margin-bottom: 35px;
  text-align: center;
}
.s1800-detail .section-heading:after {
  content: "";
  display: block;
  width: 42px;
  height: 3px;
  margin: 17px auto 0;
  background: #c93438;
}
.s1800-detail .section-heading p {
  max-width: 900px;
  margin: 0 auto;
  text-align: justify;
}
.s1800-detail .eyebrow {
  display: block;
  margin-bottom: 10px;
  color: #c93438;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 2px;
  text-transform: uppercase;
}

/* Product Introduction */
.s1800-detail .intro-section {
  max-width: 1100px;
  margin: 0 auto;
  padding: 25px 0 55px;
  text-align: center;
}
.s1800-detail .intro-section h2 {
  font-size: 30px;
  letter-spacing: -.5px;
}
.s1800-detail .intro-section .intro-text {
  max-width: 1000px;
  margin: 18px auto 25px;
  font-size: 16px;
  line-height: 1.9;
  text-align: justify;
  text-align-last: left;
}
.s1800-detail .intro-highlights {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 25px;
}
.s1800-detail .highlight-item {
  min-width: 145px;
  padding: 13px 20px;
  border: 1px solid #e6e9ec;
  border-radius: 5px;
  background: #fff;
  transition: .3s ease;
}
.s1800-detail .highlight-item:hover {
  border-color: #c93438;
  transform: translateY(-4px);
  box-shadow: 0 8px 20px rgba(25,45,60,.08);
}
.s1800-detail .highlight-item strong {
  display: block;
  color: #263746;
  font-size: 22px;
  line-height: 1.3;
}
.s1800-detail .highlight-item span {
  display: block;
  margin-top: 5px;
  color: #7b8791;
  font-size: 13px;
}

/* Image placeholders */
.s1800-detail .image-placeholder {
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  background: #f5f7f8;
  color: #a1aab1;
  text-align: center;
  font-size: 13px;
}
.s1800-detail .image-placeholder img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform .5s ease;
}

/* Core Configuration */
.s1800-detail .configuration-section {
  padding: 40px 0 55px;
}
.s1800-detail .config-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}
.s1800-detail .config-card {
  overflow: hidden;
  border: 1px solid #e8ebee;
  border-radius: 6px;
  background: #fff;
  transition: transform .3s ease, border-color .3s ease, box-shadow .3s ease;
}
.s1800-detail .config-card:hover {
  transform: translateY(-6px);
  border-color: #c93438;
  box-shadow: 0 12px 25px rgba(30,48,63,.09);
}
.s1800-detail .config-card:hover .image-placeholder img {
  transform: scale(1.06);
}
.s1800-detail .config-image {
  height: 190px;
  overflow: hidden;
}
.s1800-detail .config-content {
  padding: 20px 17px 22px;
}
.s1800-detail .config-content h3 {
  margin-bottom: 9px;
  font-size: 17px;
}
.s1800-detail .config-content p {
  margin-bottom: 0;
  font-size: 14px;
  line-height: 1.8;
}

/* Advantages */
.s1800-detail .advantages-section {
  padding: 40px 0 55px;
}
.s1800-detail .advantage-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 30px 25px;
}
.s1800-detail .advantage-item {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  padding: 10px 5px;
  transition: transform .3s ease;
}
.s1800-detail .advantage-item:hover {
  transform: translateY(-4px);
}
.s1800-detail .advantage-icon {
  flex: 0 0 46px;
  width: 46px;
  height: 46px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid #e4e8eb;
  border-radius: 6px;
  color: #c93438;
  transition: .3s ease;
}
.s1800-detail .advantage-item:hover .advantage-icon {
  color: #fff;
  border-color: #c93438;
  background: #c93438;
  transform: rotate(-5deg);
}
.s1800-detail .advantage-icon svg {
  width: 23px;
  height: 23px;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.7;
  stroke-linecap: round;
  stroke-linejoin: round;
}
.s1800-detail .advantage-text h3 {
  margin: 1px 0 6px;
  font-size: 16px;
}
.s1800-detail .advantage-text p {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
}

/* Applications */
.s1800-detail .applications-section {
  padding: 40px 0 55px;
}
.s1800-detail .application-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}
.s1800-detail .application-card {
  overflow: hidden;
  border: 1px solid #e8ebee;
  border-radius: 6px;
  background: #fff;
  transition: .3s ease;
}
.s1800-detail .application-card:hover {
  transform: translateY(-5px);
  border-color: #c93438;
  box-shadow: 0 10px 22px rgba(30,48,63,.08);
}
.s1800-detail .application-card:hover .image-placeholder img {
  transform: scale(1.06);
}
.s1800-detail .application-image {
  height: 190px;
  overflow: hidden;
}
.s1800-detail .application-card h3 {
  margin: 0;
  padding: 17px 14px;
  font-size: 16px;
  text-align: center;
}

/* Specifications */
.s1800-detail .spec-section {
  padding: 40px 0 20px;
}
.s1800-detail .spec-table {
  width: 100%;
  border-collapse: collapse;
  border: 1px solid #e5e9ec;
  font-size: 15px;
}
.s1800-detail .spec-table th,
.s1800-detail .spec-table td {
  padding: 15px 18px;
  border: 1px solid #e5e9ec;
  text-align: left;
  vertical-align: middle;
}
.s1800-detail .spec-table th {
  width: 32%;
  color: #263746;
  background: #f7f8f9;
  font-weight: 700;
}
.s1800-detail .spec-table td {
  color: #64717d;
  background: #fff;
}
.s1800-detail .spec-note {
  margin-top: 15px;
  font-size: 13px;
  color: #8a949c;
}

/* CTA */
.s1800-detail .contact-section {
  margin-top: 45px;
  padding: 30px 20px;
  border-top: 1px solid #e8ebee;
  text-align: center;
}
.s1800-detail .contact-section h2 {
  font-size: 23px;
}
.s1800-detail .contact-section p {
  margin-bottom: 18px;
  font-size: 15px;
}
.s1800-detail .contact-link {
  display: inline-block;
  padding: 13px 30px;
  border: 1px solid #c93438;
  border-radius: 3px;
  background: #c93438;
  color: #fff !important;
  font-size: 14px;
  font-weight: 700;
  text-decoration: none !important;
  transition: .3s ease;
}
.s1800-detail .contact-link:hover {
  background: #fff;
  color: #c93438 !important;
}

@media (max-width: 900px) {
  .s1800-detail .config-grid,
  .s1800-detail .application-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .s1800-detail .advantage-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}
@media (max-width: 560px) {
  .s1800-detail {
    padding: 15px 8px 35px;
  }
  .s1800-detail h2 {
    font-size: 23px;
  }
  .s1800-detail .intro-section h2 {
    font-size: 25px;
  }
  .s1800-detail .intro-section .intro-text {
    font-size: 15px;
  }
  .s1800-detail .config-grid,
  .s1800-detail .application-grid,
  .s1800-detail .advantage-grid {
    grid-template-columns: 1fr;
    gap: 15px;
  }
  .s1800-detail .config-image,
  .s1800-detail .application-image {
    height: 210px;
  }
  .s1800-detail .spec-table th,
  .s1800-detail .spec-table td {
    padding: 12px 10px;
    font-size: 13px;
  }
  .s1800-detail .spec-table th {
    width: 38%;
  }
  .s1800-detail .highlight-item {
    min-width: 125px;
    padding: 11px 14px;
  }
}
@media (prefers-reduced-motion: reduce) {
  .s1800-detail *,
  .s1800-detail *:before,
  .s1800-detail *:after {
    transition: none !important;
    animation: none !important;
  }
}

/* Intro width aligned with Core Configuration */
.s1800-detail .intro-section {
  width: 100%;
  max-width: none;
  margin: 0 auto;
  padding: 25px 0 55px;
  text-align: center;
}

.s1800-detail .intro-section .intro-text {
  width: 100%;
  max-width: none;
  margin: 18px auto 25px;
  padding: 0;
  font-size: 16px;
  line-height: 1.9;
  text-align: justify;
  text-align-last: left;
}

/* Four equal highlight cards */
.s1800-detail .intro-highlights {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 20px;
  width: 100%;
  margin-top: 25px;
}

.s1800-detail .highlight-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  width: 100%;
  min-width: 0;
  min-height: 100px;
  padding: 15px 12px;
  border: 1px solid #e6e9ec;
  border-radius: 5px;
  background: #fff;
  text-align: center;
  transition: .3s ease;
}

.s1800-detail .highlight-item strong {
  display: block;
  color: #c93438;
  font-size: 23px;
  line-height: 1.3;
  font-weight: 700;
}

.s1800-detail .highlight-item span {
  display: block;
  margin-top: 7px;
  color: #7b8791;
  font-size: 13px;
  line-height: 1.4;
  text-align: center;
}

/* Equal card layout on smaller screens */
@media (max-width: 900px) {
  .s1800-detail .intro-highlights {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 560px) {
  .s1800-detail .intro-highlights {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 12px;
  }

  .s1800-detail .highlight-item {
    min-height: 90px;
  }
}