.product-hero {
  position: relative;
  overflow: hidden;
  padding: 102px 0 86px;
  color: #fff;
  background:
    linear-gradient(105deg, rgba(16,28,53,.98) 0%, rgba(24,46,101,.93) 56%, rgba(16,28,53,.72) 100%),
    url("../images/龙虾群控智能系统.png") right center / cover no-repeat;
}
.product-hero::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 5px;
  background: linear-gradient(90deg, var(--navy), var(--red), var(--gold));
}
.product-hero .container { position: relative; z-index: 1; }
.product-hero h1 {
  max-width: 760px;
  margin: 0 0 14px;
  font-size: 48px;
  line-height: 1.28;
  font-weight: 700;
}
.product-hero p {
  max-width: 700px;
  margin: 0;
  color: rgba(255,255,255,.78);
  font-size: 18px;
}
.product-hero .eyebrow { color: #ffce74; }
.product-hero .eyebrow::before { background: #ffce74; }

.product-nav {
  position: sticky;
  top: 90px;
  z-index: 9;
  border-bottom: 1px solid var(--line);
  background: rgba(255,255,255,.98);
  backdrop-filter: blur(10px);
}
.product-nav .container {
  display: flex;
  gap: 4px;
  overflow-x: auto;
  white-space: nowrap;
}
.product-nav a {
  display: block;
  padding: 18px 14px;
  color: #4f5968;
  font-size: 14px;
  border-bottom: 2px solid transparent;
}
.product-nav a:hover {
  color: var(--red);
  border-color: var(--red);
}

.product-series { padding: 88px 0; }
.product-series.alt { background: linear-gradient(180deg, #f8fafc 0%, #f1f4f8 100%); }
.series-title {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 34px;
}
.series-title span {
  min-width: 102px;
  padding: 6px 12px;
  color: var(--red);
  text-align: center;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 1px;
  border: 1px solid rgba(215, 33, 31, .18);
  background: #fff8f8;
}
.series-title h2 {
  margin: 0;
  color: var(--navy-dark);
  font-size: 32px;
  font-weight: 700;
}
.showcase {
  display: grid;
  grid-template-columns: 1fr 1.05fr;
  gap: 64px;
  align-items: center;
}
.showcase.reverse { grid-template-columns: 1.05fr 1fr; }
.product-photo {
  height: 365px;
  overflow: hidden;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}
.product-photo img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  padding: 28px;
  background: linear-gradient(180deg, #fff 0%, #f7f9fb 100%);
}
.copy h3 {
  margin: 0 0 12px;
  color: var(--navy-dark);
  font-size: 29px;
  line-height: 1.4;
  font-weight: 700;
}
.copy > p {
  max-width: 620px;
  margin: 0;
  color: var(--muted);
  font-size: 16px;
}
.points {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
  margin-top: 26px;
}
.points div {
  padding: 15px 14px;
  color: #4f5968;
  font-size: 14px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  transition: background .2s ease, border-color .2s ease;
}
.points div:hover {
  background: #f9fafc;
  border-color: rgba(24,46,101,.26);
}
.points strong {
  display: block;
  margin-bottom: 4px;
  color: var(--navy-dark);
  font-size: 15px;
}
.function-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
  margin-top: 28px;
}
.function-grid div {
  padding: 18px;
  color: #334052;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  font-size: 15px;
  font-weight: 700;
}
.function-grid b {
  margin-right: 8px;
  color: var(--red);
  font-size: 12px;
}
.hardware-features {
  margin-top: 30px;
  padding-top: 4px;
}
.hardware-features h4 {
  margin: 0 0 14px;
  color: var(--navy-dark);
  font-size: 17px;
}
.hardware-feature-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 14px;
}
.hardware-feature-grid article {
  padding: 15px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  transition: background .2s ease, border-color .2s ease;
}
.hardware-feature-grid article:hover {
  background: #f9fafc;
  border-color: rgba(184,137,60,.32);
}
.hardware-feature-grid strong {
  display: block;
  margin-bottom: 4px;
  color: var(--navy-dark);
  font-size: 14px;
}
.hardware-feature-grid span {
  display: block;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.65;
}
.agent {
  padding: 42px;
  color: #fff;
  border-radius: var(--radius);
  background:
    linear-gradient(135deg, rgba(16,28,53,.98), rgba(24,46,101,.94)),
    url("../images/云机房智能体系.png") center / cover no-repeat;
  box-shadow: var(--shadow);
}
.agent h3 { color: #fff; }
.agent p { color: rgba(255,255,255,.78); }
.agent .points div {
  color: rgba(255,255,255,.82);
  background: rgba(255,255,255,.07);
  border-color: rgba(255,255,255,.16);
}
.agent .points strong { color: #fff; }

@media (max-width: 1080px) {
  .product-nav { top: 68px; }
  .showcase,
  .showcase.reverse { grid-template-columns: 1fr; gap: 28px; }
  .showcase.reverse .product-photo { order: -1; }
}
@media (max-width: 640px) {
  .product-hero { padding: 66px 0 58px; }
  .product-hero h1 { font-size: 32px; }
  .product-series { padding: 58px 0; }
  .series-title { display: block; }
  .series-title span { display: inline-block; margin-bottom: 10px; }
  .series-title h2 { font-size: 26px; }
  .product-photo { height: 270px; }
  .product-photo img { padding: 18px; }
  .points,
  .function-grid,
  .hardware-feature-grid { grid-template-columns: 1fr; }
  .agent { padding: 28px 22px; }
}