.fm-product-desc .fm-install-wrap {
  display: grid;
  grid-template-columns: minmax(0, 1.35fr) minmax(280px, 0.9fr);
  gap: 18px;
  align-items: start;
  margin-bottom: 18px;
}

.fm-product-desc .fm-video-box,
.fm-product-desc .fm-kit-box {
  padding: 18px;
  background: #fff;
  border: 1px solid #ececec;
  border-radius: 16px;
}

.fm-product-desc .fm-video-box iframe,
.fm-product-desc .fm-video-box video {
  display: block;
  width: 100%;
  aspect-ratio: 16 / 9;
  height: auto;
  margin: 0;
  border: 0;
  border-radius: 12px;
  background: #000;
}

.fm-product-desc .fm-kit-box figure {
  margin: 0;
  text-align: center;
}

.fm-product-desc .fm-kit-box img {
  margin: 0 auto 12px;
  max-width: 100%;
  height: auto;
}

.fm-product-desc .fm-install-note {
  margin-top: 10px;
  font-size: 13px;
  line-height: 1.6;
  color: #666;
}

@media (max-width: 768px) {
  .fm-product-desc .fm-install-wrap {
    grid-template-columns: 1fr;
  }
}

.fm-product-desc {
  font-size: 15px;
  line-height: 1.75;
  color: #222;
  word-wrap: break-word;
}

.fm-product-desc * {
  box-sizing: border-box;
}

.fm-product-desc h2 {
  margin: 0 0 14px;
  font-size: 30px;
  line-height: 1.25;
  font-weight: 800;
  color: #111;
}

.fm-product-desc h3 {
  margin: 0 0 12px;
  font-size: 22px;
  line-height: 1.35;
  font-weight: 700;
  color: #111;
}

.fm-product-desc h4 {
  margin: 0 0 8px;
  font-size: 17px;
  line-height: 1.4;
  font-weight: 700;
  color: #111;
}

.fm-product-desc p {
  margin: 0 0 14px;
}

.fm-product-desc strong {
  font-weight: 700;
  color: #111;
}

.fm-product-desc ul,
.fm-product-desc ol {
  margin: 0 0 16px 20px;
  padding: 0;
}

.fm-product-desc li {
  margin-bottom: 8px;
}

.fm-product-desc hr {
  border: 0;
  height: 1px;
  background: #e8e8e8;
  margin: 30px 0;
}

.fm-product-desc section {
  margin: 0 0 22px;
}

.fm-product-desc a {
  color: #0b57d0;
  text-decoration: none;
  font-weight: 600;
}

.fm-product-desc a:hover {
  text-decoration: underline;
}

.fm-product-desc img {
  display: block;
  max-width: 100%;
  height: auto;
  margin: 14px auto;
  border-radius: 14px;
}

.fm-product-desc figure {
  margin: 18px 0;
  text-align: center;
}

.fm-product-desc figcaption {
  margin-top: 8px;
  font-size: 13px;
  color: #666;
}

.fm-product-desc small,
.fm-product-desc .note {
  display: block;
  font-size: 13px;
  line-height: 1.6;
  color: #666;
}

.fm-product-desc .fm-hero {
  padding: 28px 24px;
  border-radius: 20px;
  background: linear-gradient(135deg, #f6f9ff 0%, #eef4ff 100%);
  border: 1px solid #d9e6ff;
  margin-bottom: 24px;
}

.fm-product-desc .fm-hero-subtitle {
  max-width: 820px;
  margin: 0 auto;
  text-align: center;
  font-size: 16px;
}

.fm-product-desc .fm-grid-3 {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
  margin-top: 18px;
}

.fm-product-desc .fm-grid-2 {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.fm-product-desc .fm-card {
  padding: 18px;
  background: #fff;
  border: 1px solid #ebebeb;
  border-radius: 16px;
}

.fm-product-desc .fm-card p:last-child,
.fm-product-desc .fm-box p:last-child,
.fm-product-desc .fm-tip p:last-child {
  margin-bottom: 0;
}

.fm-product-desc .fm-box {
  padding: 18px 20px;
  background: #f8faff;
  border: 1px solid #dbe7ff;
  border-radius: 16px;
}

.fm-product-desc .fm-tip {
  padding: 18px 20px;
  background: #fff8e8;
  border: 1px solid #f0ddaa;
  border-radius: 16px;
}

.fm-product-desc .fm-steps {
  list-style: none;
  margin: 0;
  padding: 0;
  counter-reset: fm-step;
}

.fm-product-desc .fm-steps li {
  position: relative;
  margin: 0 0 12px;
  padding: 14px 14px 14px 52px;
  background: #fff;
  border: 1px solid #ececec;
  border-radius: 14px;
}

.fm-product-desc .fm-steps li:before {
  counter-increment: fm-step;
  content: counter(fm-step);
  position: absolute;
  left: 14px;
  top: 14px;
  width: 26px;
  height: 26px;
  border-radius: 50%;
  background: #0b57d0;
  color: #fff;
  font-size: 13px;
  font-weight: 700;
  line-height: 26px;
  text-align: center;
}

.fm-product-desc .fm-links {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.fm-product-desc .fm-link {
  display: block;
  padding: 18px;
  background: #fff;
  border: 1px solid #e7edf7;
  border-radius: 16px;
  text-decoration: none;
  color: #111;
}

.fm-product-desc .fm-link:hover {
  border-color: #c8d9ff;
  text-decoration: none;
}

.fm-product-desc .fm-link-title {
  display: block;
  margin-bottom: 6px;
  font-weight: 700;
  color: #111;
}

.fm-product-desc .fm-link-text {
  display: block;
  font-size: 13px;
  line-height: 1.55;
  color: #666;
  font-weight: 400;
}

.fm-product-desc .fm-center {
  text-align: center;
}

@media (max-width: 900px) {
  .fm-product-desc .fm-grid-3,
  .fm-product-desc .fm-grid-2,
  .fm-product-desc .fm-links {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  .fm-product-desc {
    font-size: 14px;
    line-height: 1.7;
  }

  .fm-product-desc h2 {
    font-size: 24px;
  }

  .fm-product-desc h3 {
    font-size: 19px;
  }

  .fm-product-desc h4 {
    font-size: 16px;
  }

  .fm-product-desc .fm-hero,
  .fm-product-desc .fm-card,
  .fm-product-desc .fm-box,
  .fm-product-desc .fm-tip,
  .fm-product-desc .fm-link {
    padding: 16px 14px;
    border-radius: 14px;
  }

  .fm-product-desc .fm-hero-subtitle {
    font-size: 15px;
  }
}