/* ==========================================================================
   思达普科技官网 · 产品详情页样式
   结构：面包屑 → hero（文案/主图）→ 视频 → 图文拆分 → 核心能力 → 定价 → FAQ → 相关推荐
   ========================================================================== */

.product-page {
  padding-bottom: 24px;
}

/* ---- 面包屑 ---- */
.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  max-width: var(--content-max);
  margin: 0 auto;
  padding: 16px 24px;
  font-size: 13px;
  color: var(--color-text-secondary);
}

.breadcrumb a {
  color: var(--color-text-secondary);
  text-decoration: none;
}

.breadcrumb a:hover {
  color: var(--color-text-primary);
}

.breadcrumb-sep {
  color: var(--color-text-tertiary);
}

/* ---- hero ---- */
.product-hero {
  display: grid;
  gap: 40px;
  max-width: var(--content-max);
  margin: 0 auto;
  padding: 24px 24px 48px;
}

.product-hero-copy .eyebrow {
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.06em;
  color: var(--color-accent);
}

.product-hero h1 {
  margin-top: 10px;
  font-size: clamp(2rem, 4.5vw, 3.5rem);
  font-weight: 600;
  line-height: 1.1;
  letter-spacing: -0.01em;
}

.product-hero-tagline {
  margin-top: 12px;
  font-size: clamp(1.1875rem, 2.5vw, 1.5rem);
  color: var(--color-text-secondary);
}

.product-hero-summary {
  margin-top: 16px;
  max-width: 520px;
  font-size: 15px;
  color: var(--color-text-secondary);
}

.product-hero-price {
  margin-top: 18px;
  font-size: 14px;
  color: var(--color-text-tertiary);
}

.product-hero-ctas {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 24px;
}

.product-stats {
  display: flex;
  flex-wrap: wrap;
  gap: 28px 48px;
  margin-top: 36px;
}

.product-stat-value {
  font-size: 24px;
  font-weight: 600;
}

.product-stat-label {
  margin-top: 4px;
  font-size: 13px;
  color: var(--color-text-tertiary);
}

.product-hero-media {
  overflow: hidden;
  border-radius: var(--radius-media);
  background-color: var(--color-bg-secondary);
}

.product-hero-media img {
  width: 100%;
  height: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
}

/* ---- 视频区 ---- */
.media-band {
  max-width: var(--content-max);
  margin: 0 auto;
  padding: 48px 24px 8px;
  scroll-margin-top: 56px;
}

.media-band-title {
  font-size: clamp(1.5rem, 3vw, 2rem);
  font-weight: 600;
  text-align: center;
}

.media-band-note {
  margin-top: 8px;
  font-size: 14px;
  color: var(--color-text-secondary);
  text-align: center;
}

.video-frame {
  position: relative;
  margin-top: 24px;
  aspect-ratio: 16 / 9;
  overflow: hidden;
  border-radius: var(--radius-media);
  background-color: #000000;
}

.video-frame iframe {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  border: 0;
}

.video-poster {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.video-play {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 12px;
  color: #FFFFFF;
}

.video-play-icon {
  display: flex;
  width: 72px;
  height: 72px;
  align-items: center;
  justify-content: center;
  border: 1px solid rgba(255, 255, 255, 0.5);
  border-radius: 50%;
  background-color: rgba(255, 255, 255, 0.18);
  -webkit-backdrop-filter: blur(6px);
  backdrop-filter: blur(6px);
}

.video-play-icon svg {
  margin-left: 4px;
}

.video-play-text {
  font-size: 14px;
}

/* ---- 图文拆分 ---- */
.split {
  display: grid;
  gap: 32px;
  max-width: var(--content-max);
  margin: 0 auto;
  padding: 56px 24px;
  scroll-margin-top: 56px;
}

.split-media {
  overflow: hidden;
  border-radius: var(--radius-media);
  background-color: var(--color-bg-secondary);
}

.split-media img {
  width: 100%;
  height: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
}

.split-copy h2 {
  font-size: clamp(1.5rem, 3vw, 2.25rem);
  font-weight: 600;
  line-height: 1.2;
}

.split-copy > p {
  margin-top: 12px;
  font-size: 15px;
  color: var(--color-text-secondary);
}

.split-points {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-top: 18px;
}

.split-point {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 15px;
}

.split-point-mark {
  display: inline-flex;
  flex: none;
  width: 18px;
  height: 18px;
  align-items: center;
  justify-content: center;
  margin-top: 2px;
  border-radius: 50%;
  background-color: var(--color-accent);
  color: #FFFFFF;
  font-size: 11px;
}

/* ---- 核心能力 ---- */
.features {
  max-width: var(--content-max);
  margin: 0 auto;
  padding: 40px 24px;
  scroll-margin-top: 56px;
}

.features-title,
.pricing-title,
.faq-title,
.related-title {
  font-size: clamp(1.5rem, 3vw, 2rem);
  font-weight: 600;
  text-align: center;
}

.feature-grid {
  display: grid;
  gap: 16px;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  margin-top: 32px;
}

.feature-card {
  padding: 24px;
  border-radius: var(--radius-card);
  background-color: var(--color-bg-card);
}

.feature-card h3 {
  font-size: 16px;
  font-weight: 600;
}

.feature-card p {
  margin-top: 8px;
  font-size: 14px;
  color: var(--color-text-secondary);
}

/* ---- 定价 ---- */
.pricing {
  max-width: var(--content-max);
  margin: 0 auto;
  padding: 48px 24px 24px;
  scroll-margin-top: 56px;
}

.pricing-note {
  margin-top: 8px;
  font-size: 13px;
  color: var(--color-text-tertiary);
  text-align: center;
}

.plan-grid {
  display: grid;
  gap: 16px;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  margin-top: 32px;
}

.plan-card {
  position: relative;
  display: flex;
  flex-direction: column;
  padding: 28px 24px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-card);
  background-color: var(--color-bg-card);
  text-align: center;
}

.plan-card--featured {
  border-color: var(--color-accent);
  box-shadow: 0 12px 32px rgba(29, 29, 31, 0.08);
}

.plan-badge {
  position: absolute;
  top: -11px;
  left: 50%;
  transform: translateX(-50%);
  padding: 3px 12px;
  border-radius: 980px;
  background-color: var(--color-accent);
  color: var(--color-text-inverse);
  font-size: 12px;
  white-space: nowrap;
}

.plan-name {
  font-size: 16px;
  font-weight: 600;
}

.plan-price {
  margin-top: 12px;
  font-size: 28px;
  font-weight: 600;
}

.plan-price small {
  font-size: 14px;
  font-weight: 400;
  color: var(--color-text-secondary);
}

.plan-desc {
  margin-top: 6px;
  font-size: 13px;
  color: var(--color-text-tertiary);
}

.plan-features {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin: 20px 0 24px;
  text-align: left;
}

.plan-features li {
  display: flex;
  align-items: flex-start;
  gap: 8px;
  font-size: 14px;
  color: var(--color-text-secondary);
}

.plan-features .plan-mark {
  flex: none;
  color: var(--color-accent);
}

.plan-cta {
  margin-top: auto;
}

/* ---- 灵活产品：配套硬件（同页按数量加购） ---- */
.addons {
  max-width: var(--content-narrow);
  margin: 0 auto;
  padding: 8px 24px 24px;
  scroll-margin-top: 56px;
}

.addons-title {
  font-size: 24px;
  font-weight: 600;
  text-align: center;
}

.addons-note {
  margin-top: 8px;
  font-size: 13px;
  color: var(--color-text-tertiary);
  text-align: center;
}

.addon-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-top: 24px;
}

.addon-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 14px 18px;
  border: 1px solid var(--color-border);
  border-radius: 14px;
  background-color: var(--color-bg-card);
  transition: border-color 0.2s var(--ease-out), background-color 0.2s var(--ease-out);
}

.addon-row.is-picked {
  border-color: var(--color-accent);
  background-color: var(--color-accent-soft);
}

.addon-main {
  min-width: 0;
}

.addon-name {
  font-size: 15px;
  font-weight: 600;
}

.addon-meta {
  margin-top: 4px;
  font-size: 14px;
  color: var(--color-text-secondary);
}

.addon-meta small {
  margin-left: 4px;
  font-size: 12px;
  color: var(--color-text-tertiary);
}

.addon-actions {
  display: flex;
  align-items: center;
  gap: 10px;
  flex: none;
}

.addon-qty {
  display: inline-flex;
  align-items: center;
  padding: 2px;
  border: 1px solid var(--color-border);
  border-radius: 980px;
  background-color: var(--color-bg-card);
}

.addon-qty button {
  width: 28px;
  height: 28px;
  border: 0;
  border-radius: 50%;
  background-color: transparent;
  color: var(--color-text-primary);
  font-size: 16px;
  line-height: 1;
  cursor: pointer;
  transition: background-color 0.2s var(--ease-out);
}

.addon-qty button:hover {
  background-color: var(--color-accent-soft);
}

.addon-qty > span {
  min-width: 30px;
  text-align: center;
  font-size: 14px;
  font-variant-numeric: tabular-nums;
}

.addon-add {
  white-space: nowrap;
}

.addon-add:disabled,
.addons-all:disabled {
  opacity: 0.45;
  cursor: not-allowed;
}

.addons-footer {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
  margin-top: 20px;
}

.addons-summary {
  font-size: 14px;
  color: var(--color-text-secondary);
}

@media (max-width: 560px) {
  .addon-row {
    flex-direction: column;
    align-items: stretch;
  }

  .addon-actions {
    justify-content: space-between;
  }

  .addon-add {
    flex: 1;
  }
}

/* ---- FAQ ---- */
.faq {
  max-width: var(--content-narrow);
  margin: 0 auto;
  padding: 40px 24px 64px;
}

.faq-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-top: 24px;
}

.faq-item {
  padding: 16px 20px;
  border-radius: 12px;
  background-color: var(--color-bg-card);
}

.faq-item summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  list-style: none;
}

/* ==========================================================================
   详情页登录门禁（手机号必填，姓名选填）与已登录用户条
   ========================================================================== */
.login-card {
  max-width: 440px;
  margin: 56px auto;
  padding: 40px 32px;
  border-radius: var(--radius-card);
  background-color: var(--color-bg-card);
  box-shadow: 0 0 0 1px var(--color-border);
  text-align: center;
}

.login-card .eyebrow {
  margin-bottom: 12px;
}

.login-title {
  font-size: 28px;
  font-weight: 600;
  letter-spacing: -0.01em;
  color: var(--color-text-primary);
}

.login-sub {
  margin-top: 8px;
  font-size: 14px;
  color: var(--color-text-secondary);
}

.login-product {
  display: inline-block;
  margin-top: 16px;
  padding: 6px 16px;
  border-radius: 980px;
  background-color: var(--color-accent-soft);
  color: var(--color-accent-active);
  font-size: 14px;
  font-weight: 500;
}

.login-card form {
  margin-top: 24px;
  text-align: left;
}

.login-card .form-field + .form-field {
  margin-top: 16px;
}

.login-card .form-error {
  margin-top: 12px;
}

.login-card .button {
  margin-top: 16px;
}

.login-back {
  margin-top: 16px;
  font-size: 13px;
}

.login-back a {
  color: var(--color-text-secondary);
  text-decoration: none;
}

.login-back a:hover {
  color: var(--color-text-primary);
}

/* ---- 已登录用户条 ---- */
.user-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  max-width: var(--content-max);
  margin: 0 auto;
  padding: 12px 24px 0;
}

.user-bar-name {
  font-size: 13px;
  color: var(--color-text-secondary);
}

.user-bar-logout {
  padding: 6px 14px;
  border: 0;
  border-radius: 980px;
  background-color: var(--color-bg-secondary);
  color: var(--color-text-secondary);
  font-family: inherit;
  font-size: 13px;
  cursor: pointer;
  transition: all 0.3s ease;
}

.user-bar-logout:hover {
  background-color: var(--color-accent-soft);
  color: var(--color-accent-active);
}

.faq-item summary::-webkit-details-marker {
  display: none;
}

.faq-item summary::after {
  content: "+";
  font-size: 18px;
  color: var(--color-accent);
  transition: transform 0.2s ease;
}

.faq-item[open] summary::after {
  transform: rotate(45deg);
}

.faq-item p {
  margin-top: 10px;
  font-size: 14px;
  color: var(--color-text-secondary);
}

/* ---- 相关推荐 ---- */
.related {
  max-width: var(--content-max);
  margin: 0 auto;
  padding: 40px 24px 64px;
}

.related .product-grid {
  padding: 0;
  margin-top: 28px;
}

.related .product-card {
  min-height: 420px;
}

/* ---- 未找到产品 ---- */
.notfound {
  padding: 120px 24px;
  text-align: center;
}

.notfound h1 {
  font-size: 2rem;
  font-weight: 600;
}

.notfound p {
  margin: 12px 0 24px;
  color: var(--color-text-secondary);
}

/* ---- 断点 ---- */
@media (min-width: 1024px) {
  .product-hero {
    grid-template-columns: 1fr 1fr;
    align-items: center;
    gap: 64px;
  }

  .split {
    grid-template-columns: 1fr 1fr;
    align-items: center;
    gap: 64px;
  }

  .split.is-flipped .split-media {
    order: 2;
  }
}