/* ===== 产品详情页公共样式 — OXYZ-style layout ===== */

/* --- Banner --- */
.detail-banner {
  position: relative; width: 100%; height: 480px; margin-top: var(--header-height, 72px); overflow: hidden;
}
.detail-banner-bg {
  position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover;
}
.detail-banner .container {
  position: relative; z-index: 1; display: flex; flex-direction: column;
  justify-content: center; height: 100%;
  padding-left: var(--page-padding); padding-right: var(--page-padding);
}
.detail-banner-label {
  display: inline-block; font-size: 14px; font-weight: 500;
  color: var(--color-primary); letter-spacing: 2px;
  text-transform: uppercase; margin-bottom: 16px;
}
.detail-banner h1 {
  font-size: 56px; font-weight: 400; color: var(--color-text-1);
  margin-bottom: 20px; letter-spacing: 1px; line-height: 1.2;
}
.detail-banner p {
  font-size: 18px; font-weight: 400; color: var(--color-text-2);
  max-width: 640px; line-height: 1.8;
}
.detail-banner-hero {
  display: none;
}

/* 典型应用场景模块 — 已移除 */
.product-scenarios {
  display: none;
}

/* --- All product sections use consistent padding --- */
.video-advantages,
.product-arch,
.product-scenarios,
.product-timeline,
.product-faq {
  padding: var(--section-padding) 0;
}

/* Alternate backgrounds */
.video-advantages { background: #fff; }
.product-arch { background: var(--color-sand); position: relative; }
.product-scenarios { background: #fff; }
.product-timeline { background: var(--color-sand); position: relative; }
.product-faq { background: #fff; }

/* --- Advantages Grid (inside section-right) --- */
.advantages-grid {
  display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px;
}
.advantage-card {
  padding: 80px 24px;
  border: 1px solid var(--color-border);
  background: #fff;
  transition: border-color 0.3s;
}
.advantage-card:hover { border-color: var(--color-text-1); }
.advantage-card h4 { font-size: 18px; font-weight: 500; color: var(--color-text-1); margin-bottom: 10px; }
.advantage-card p { font-size: 15px; color: var(--color-text-3); line-height: 1.7; }

/* --- Feature Blocks (alternating left-right) --- */
.features-section { padding: var(--section-padding) 0 0; }
.feature-block { padding: var(--section-padding) 0; }
.feature-block .container {
  display: flex; align-items: center; gap: 80px;
}
.feature-text { flex: 1; min-width: 0; }
.feature-text h3 { font-size: 24px; font-weight: 500; color: var(--color-text-1); margin-bottom: 20px; }
.feature-text p { font-size: 16px; color: var(--color-text-2); line-height: 1.8; margin-bottom: 12px; }
.feature-btns { display: flex; gap: 12px; margin-top: 28px; }
.btn-primary {
  display: inline-flex; align-items: center; justify-content: space-between;
  gap: 20px; min-width: 140px;
  background: var(--color-primary); color: #fff; padding: 10px 20px; font-size: 13px;
  font-weight: 500; border: 1px solid var(--color-primary); cursor: pointer; transition: background 0.3s; text-decoration: none;
}
.btn-primary::after {
  content: "→"; font-size: 14px; transition: transform 0.3s ease;
}
.btn-primary:hover::after { transform: translateX(6px); }
.btn-outline-blue {
  display: inline-flex; align-items: center; justify-content: space-between;
  gap: 20px; min-width: 140px;
  background: #fff; color: var(--color-text-1); padding: 10px 20px; font-size: 13px;
  font-weight: 500; border: 1px solid var(--color-border); cursor: pointer; transition: background 0.3s; text-decoration: none;
}
.btn-outline-blue::after {
  content: "→"; font-size: 14px; color: var(--color-text-3); transition: transform 0.3s ease;
}
.btn-outline-blue:hover { background: var(--color-sand); }
.btn-outline-blue:hover::after { transform: translateX(6px); }
.feature-image { flex: 1; min-width: 0; }
.feature-image img { width: 100%; box-shadow: 0 8px 30px rgba(0,0,0,0.08); }

.feature-block.dark-blue { background: var(--color-sand); }
.feature-block.dark-blue .feature-text h3 { color: var(--color-text-1); }
.feature-block.dark-blue .feature-text p { color: var(--color-text-2); }
.feature-block.reversed .container { flex-direction: row-reverse; }

/* --- Stats CTA --- */
.stats-cta {
  position: relative; overflow: hidden; padding: var(--section-padding) 0;
}
.stats-cta-video {
  position: absolute; top: 0; left: 0; width: 100%; height: 100%;
  object-fit: cover; z-index: 0;
}
.stats-cta-overlay {
  position: absolute; top: 0; left: 0; width: 100%; height: 100%;
  background: rgba(8, 11, 12, 0.85); z-index: 1;
}
.stats-cta-inner {
  padding: 0 var(--page-padding);
  position: relative; z-index: 2;
}
.stats-cta-top {
  display: flex; align-items: center; justify-content: space-between;
  margin-bottom: 48px;
}
.stats-cta-top h2 { font-size: 42px; font-weight: 600; color: #fff; margin: 0; }
.stats-cta-btns { display: flex; gap: 12px; }
.stats-cta-btns .btn-outline {
  display: inline-flex; align-items: center; padding: 10px 28px;
  border: 1px solid rgba(255,255,255,0.4); color: #fff;
  font-size: 14px; font-weight: 500; transition: all .25s ease; text-decoration: none;
}
.stats-cta-btns .btn-outline:hover {
  border-color: #fff; background: rgba(255,255,255,0.1);
}
.stats-cta-grid {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px;
}
.stats-cta-item {
  padding: 32px 28px; border: 1px solid rgba(255,255,255,0.12); text-align: center;
  background: rgba(255,255,255,0.05);
  backdrop-filter: blur(6px);
}
.stats-cta-num { font-size: 36px; font-weight: 700; color: #fff; margin-bottom: 8px; font-family: 'D-DIN', var(--font-num); }
.stats-cta-label { font-size: 14px; color: rgba(255,255,255,0.55); }

/* --- Product Architecture Diagram --- */
.product-arch .arch-map { padding: 0; }
.product-arch .arch-panel {
  background: #fff; padding: 22px; position: relative;
}
.product-arch .arch-panel-label {
  position: static; background: none;
  color: var(--color-primary);
  padding: 0 0 14px 2px;
  font-size: 14px; font-weight: 600;
  letter-spacing: 0.5px; margin: 0;
}
.product-arch .arch-cards-4col {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px;
}
.product-arch .arch-cards-col {
  display: flex; flex-direction: column; gap: 10px;
}
.product-arch .arch-card {
  background: #fff; border: 1px solid var(--color-border);
  padding: 14px 12px; font-size: 13px;
  color: var(--color-text-1); text-align: center;
  font-weight: 500; line-height: 1.4;
  transition: all .25s ease;
}
.product-arch .arch-card:hover {
  border-color: var(--color-primary); color: var(--color-primary);
  box-shadow: 0 4px 14px rgba(3,99,233,0.12);
  transform: translateY(-2px);
}
.product-arch .arch-row-3 {
  display: grid; grid-template-columns: 210px 1fr 210px;
  gap: 18px; margin: 10px 0; align-items: stretch;
}
.product-arch .arch-panel-side { display: flex; flex-direction: column; }
.product-arch .arch-panel-side .arch-cards-col { flex: 1; }
.product-arch .arch-panel-hub {
  background: linear-gradient(135deg, #eef3ff 0%, var(--color-sand) 100%);
  padding: 24px; border: 1px solid var(--color-border);
}
.product-arch .arch-panel-label-main {
  background: none; color: var(--color-primary);
  font-size: 15px; font-weight: 700;
  letter-spacing: 1px; padding: 0 0 16px 2px;
}
.product-arch .arch-hub-grid {
  display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px;
}
.product-arch .arch-hub-cell {
  background: #fff; border: 1px solid var(--color-border);
  padding: 16px; position: relative;
  box-shadow: 0 2px 8px rgba(0,0,0,0.04);
}
.product-arch .arch-hub-cell-title {
  position: static; background: none;
  color: var(--color-text-1); padding: 0 0 10px;
  font-size: 13px; font-weight: 600;
  border: none; letter-spacing: 0;
}
.product-arch .arch-hub-cell-items {
  display: flex; flex-wrap: wrap; gap: 6px; justify-content: center;
}
.product-arch .arch-hub-cell-items span {
  background: rgba(3,99,233,0.08); color: var(--color-primary);
  font-size: 12px; padding: 6px 10px;
  font-weight: 500; white-space: nowrap;
}
.product-arch .arch-arrow-v {
  display: flex; justify-content: center; align-items: center;
  gap: 8px; height: 36px;
}
.product-arch .arch-arrow-v svg { flex-shrink: 0; }
.product-arch .arch-arrow-v::before,
.product-arch .arch-arrow-v::after { display: none; }

/* --- Scenarios: 4×2 image-first grid (full-width, no split) --- */
.product-scenarios .section-split { display: block; }
.product-scenarios .section-left { max-width: 100%; flex: none; position: static; margin-bottom: 40px; }
.scenario-grid {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px;
}
.scenario-card {
  background: #fff; border: 1px solid var(--color-border); border-radius: 8px;
  position: relative; transition: all 0.3s ease; overflow: hidden;
}
.scenario-card:hover {
  transform: translateY(-4px); border-color: var(--color-primary);
  box-shadow: 0 8px 24px rgba(3,99,233,0.08);
}
.scenario-card-img {
  width: 100%; aspect-ratio: 4/3; object-fit: cover; display: block;
  background: var(--color-sand);
}
.scenario-card-body {
  padding: 16px;
}
.scenario-card h4 {
  font-size: 15px; font-weight: 500; color: var(--color-text-1);
  margin: 0; text-align: center;
}
.scenario-card p { display: none; }
.scenario-tags { display: none; }

/* --- Timeline V2: Vertical list with bottom border --- */
.timeline-v {
  display: flex; flex-direction: column; gap: 0;
}
.timeline-v-item {
  display: flex; align-items: flex-start; gap: 28px;
  padding: 32px 0;
  border-bottom: 1px solid var(--color-text-1);
  position: relative;
}
.timeline-v-item:first-child { padding-top: 0; }
.timeline-v-num {
  font-family: 'D-DIN', monospace;
  font-size: 32px; font-weight: 700;
  color: var(--color-text-4);
  line-height: 1; min-width: 52px;
  padding-top: 2px;
  transition: color 0.3s ease;
}
.timeline-v-item:hover .timeline-v-num { color: var(--color-text-1); }
.timeline-v-content { flex: 1; }
.timeline-v-content h4 {
  font-size: 18px; font-weight: 500; color: var(--color-text-1);
  margin: 0 0 8px;
}
.timeline-v-content p {
  font-size: 15px; color: var(--color-text-3); line-height: 1.7; margin: 0;
}

/* --- FAQ (inside section-right) --- */
.faq-list {
  display: flex; flex-direction: column; gap: 12px;
}
.faq-item {
  background: #fff; border: 1px solid var(--color-border);
  overflow: hidden; transition: all 0.3s ease;
}
.faq-item:hover { border-color: var(--color-primary); }
.faq-q {
  padding: 20px 24px; font-size: 16px; font-weight: 500; color: var(--color-text-1);
  display: flex; justify-content: space-between; align-items: center; cursor: default;
  user-select: none;
}
.faq-q::after {
  content: "+"; font-size: 24px; font-weight: 300; color: var(--color-text-3);
  transition: transform 0.3s ease; line-height: 1;
}
.faq-item:hover .faq-q::after { transform: rotate(45deg); color: var(--color-primary); }
.faq-a {
  max-height: 0; overflow: hidden; transition: max-height 0.4s ease, padding 0.4s ease;
  padding: 0 24px; font-size: 14px; color: var(--color-text-2); line-height: 1.8;
}
.faq-item:hover .faq-a { max-height: 400px; padding: 0 24px 20px; }

/* --- Sub-page Footer (unified with homepage) --- */
.site-footer { background: #050709; color: var(--color-text-2); }
.site-footer-inner { padding: 60px var(--page-padding) 32px; }
.site-footer-top { display: flex; gap: 60px; padding-bottom: 40px; border-bottom: 1px solid rgba(255,255,255,0.08); }
.site-footer-col { display: flex; flex-direction: column; gap: 10px; }
.site-footer-col h6 {
  font-size: 14px; font-weight: 600; color: #fff; margin-bottom: 8px;
  letter-spacing: 0.05em; text-transform: uppercase;
}
.site-footer-col a {
  font-size: 14px; color: var(--color-text-2); text-decoration: none; transition: color 0.2s;
}
.site-footer-col a:hover { color: #fff; }
.site-footer-col p { font-size: 14px; color: var(--color-text-2); }
.site-footer-qr { align-items: flex-start; }
.site-footer-qr img { margin-top: 8px; }
.site-footer-bottom { padding-top: 24px; }
.site-footer-bottom p { font-size: 12px; color: rgba(255,255,255,0.3); }
.site-footer-bottom a { color: rgba(255,255,255,0.3); text-decoration: none; }
.site-footer-bottom a:hover { color: var(--color-text-2); }

/* --- Responsive --- */
@media (max-width: 1024px) {
  .detail-banner { height: 360px; }
  .detail-banner h1 { font-size: 36px; }
  .advantages-grid { grid-template-columns: 1fr; }
  .advantage-card { padding: 48px 24px; }
  .feature-block .container { flex-direction: column; gap: 32px; }
  .feature-block.reversed .container { flex-direction: column; }
  .stats-cta-top { flex-direction: column; gap: 24px; text-align: center; }
  .stats-cta-top h2 { font-size: 32px; }
  .stats-cta-btns { justify-content: center; }
  .stats-cta-grid { grid-template-columns: repeat(2, 1fr); }
  .site-footer-top { flex-wrap: wrap; gap: 40px; }
  .product-arch .arch-row-3 { grid-template-columns: 180px 1fr 180px; gap: 12px; }
  .scenario-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 767px) {
  .detail-banner { height: 280px; }
  .detail-banner h1 { font-size: 28px; }
  .detail-banner .container { padding: 0 16px; }
  .feature-block .container { padding: 0 16px; }
  .stats-cta-inner { padding: 0 16px; }
  .stats-cta-grid { grid-template-columns: 1fr 1fr; gap: 12px; }
  .stats-cta-num { font-size: 28px; }
  .site-footer-inner { padding: 40px 16px 24px; }
  .site-footer-top { flex-direction: column; gap: 32px; }
  .product-arch .arch-row-3 { grid-template-columns: 1fr; gap: 12px; }
  .product-arch .arch-cards-4col { grid-template-columns: repeat(2, 1fr); }
  .product-arch .arch-hub-grid { grid-template-columns: 1fr; }
  .product-arch .arch-panel { padding: 16px; }
  .product-arch .arch-panel-hub { padding: 16px; }
  .timeline-v-item { gap: 16px; padding: 24px 0; }
  .timeline-v-num { font-size: 24px; min-width: 36px; }
  .advantage-card { padding: 32px 20px; }
  .advantage-card h4 { font-size: 16px; }
  .faq-q { padding: 16px 20px; }
  .scenario-grid { grid-template-columns: 1fr; }
}