/* ========== 平台服务专属样式 (page-products) ========== */
.page-products {
  --platform-nav-width: 180px;
  --version-card-min-height: 360px;
  --gold: #D4AF37;
  --gold-light: #F0E68C;
  --red: #C41E3A;
  --dark: #1A1A1A;
  --mid-gray: #5A5A5A;
  --light-gray: #E5E5E5;
  --white: #FFFFFF;
  --font-heading: 'Noto Serif SC', serif;
  --font-mono: 'JetBrains Mono', monospace;
  --transition: 0.2s ease;
}

.page-products .breadcrumb {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--mid-gray);
  margin-bottom: 1rem;
  padding: 0 1rem;
}
.page-products .breadcrumb a {
  color: var(--red);
  text-decoration: none;
}
.page-products .breadcrumb a:hover {
  text-decoration: underline;
}
.page-products .breadcrumb .sep {
  margin: 0 0.4rem;
}

.page-products .page-title {
  font-family: var(--font-heading);
  font-size: 2.2rem;
  font-weight: 700;
  color: var(--dark);
  margin: 0 0 2rem;
  padding: 0 1rem;
  border-left: 4px solid var(--gold);
  padding-left: 1rem;
}

/* 布局：内部的导航 + 内容两栏 */
.page-products .platform-layout {
  display: flex;
  flex-wrap: wrap;
  gap: 1.5rem;
  padding: 0 1rem;
}

.page-products .platform-nav {
  width: 100%;
  flex-shrink: 0;
}
.page-products .platform-nav .nav-list-internal {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}
.page-products .platform-nav .nav-list-internal li a {
  display: block;
  padding: 0.5rem 1rem;
  background: var(--light-gray);
  color: var(--dark);
  text-decoration: none;
  font-family: var(--font-mono);
  font-size: 0.9rem;
  border: 1px solid transparent;
  transition: var(--transition);
}
.page-products .platform-nav .nav-list-internal li a:hover,
.page-products .platform-nav .nav-list-internal li a:focus {
  background: var(--gold);
  color: var(--white);
  border-color: var(--gold);
}

.page-products .platform-content {
  flex: 1;
  min-width: 0;
}

/* 区块通用 */
.page-products .section-block {
  margin-bottom: 3rem;
}
.page-products .section-heading {
  font-family: var(--font-heading);
  font-size: 1.6rem;
  color: var(--dark);
  margin: 0 0 1.2rem;
  padding-bottom: 0.5rem;
  border-bottom: 2px solid var(--gold);
}

/* 最新版本卡片 */
.page-products .version-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1rem;
  background: var(--white);
  border: 1px solid var(--light-gray);
  padding: 1.5rem;
  position: relative;
  min-height: var(--version-card-min-height);
  transition: var(--transition);
}
.page-products .version-card:hover {
  box-shadow: 0 4px 12px rgba(0,0,0,0.08);
  border-color: var(--gold);
}
.page-products .version-card .version-card-img {
  width: 100%;
  max-width: 300px;
  height: auto;
  object-fit: contain;
}
.page-products .version-card .version-card-info {
  text-align: center;
}
.page-products .version-badge {
  display: inline-block;
  background: var(--gold);
  color: var(--white);
  padding: 0.2rem 0.8rem;
  font-family: var(--font-mono);
  font-size: 0.9rem;
  font-weight: 700;
  margin-bottom: 0.6rem;
}
.page-products .version-desc {
  font-size: 0.95rem;
  color: var(--mid-gray);
  margin: 0 0 1rem;
}
.page-products .btn-download {
  display: inline-block;
  padding: 0.5rem 1.5rem;
  background: var(--red);
  color: var(--white);
  text-decoration: none;
  font-family: var(--font-mono);
  font-size: 0.9rem;
  border: none;
  cursor: pointer;
  transition: var(--transition);
  opacity: 0.3; /* 默认不显眼 */
}
.page-products .btn-download:hover,
.page-products .btn-download:focus {
  opacity: 1;
  background: var(--red);
  transform: scale(1.05);
}
/* 悬停卡片时按钮显现 */
.page-products .version-card:hover .btn-download {
  opacity: 1;
}

/* 打开流程 */
.page-products .process-steps {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}
.page-products .process-step {
  border: 1px solid var(--light-gray);
  border-radius: 0; /* 锐利直角 */
  padding: 0.5rem 1rem;
  background: var(--white);
}
.page-products .process-step .step-summary {
  display: flex;
  align-items: center;
  gap: 0.8rem;
  cursor: pointer;
  font-weight: 600;
  font-family: var(--font-heading);
  color: var(--dark);
  padding: 0.3rem 0;
}
.page-products .step-number {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2rem;
  height: 2rem;
  background: var(--gold);
  color: var(--white);
  font-family: var(--font-mono);
  font-weight: 700;
  flex-shrink: 0;
}
.page-products .step-detail {
  margin-top: 0.5rem;
  padding-left: 2.8rem;
  color: var(--mid-gray);
  font-size: 0.9rem;
}
.page-products .process-image {
  width: 100%;
  height: auto;
  max-width: 800px;
  margin-top: 1rem;
  border: 1px solid var(--light-gray);
  object-fit: cover;
}

/* 旧版资料对照表 */
.page-products .old-version-table-wrapper {
  overflow-x: auto;
}
.page-products .old-version-table {
  width: 100%;
  border-collapse: collapse;
  font-family: var(--font-mono);
  font-size: 0.9rem;
  background: var(--white);
}
.page-products .old-version-table th,
.page-products .old-version-table td {
  padding: 0.7rem 1rem;
  text-align: left;
  border-bottom: 1px solid var(--light-gray);
}
.page-products .old-version-table th {
  background: var(--dark);
  color: var(--white);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}
.page-products .old-version-table tbody tr {
  transition: background var(--transition);
}
.page-products .old-version-table tbody tr:hover {
  background: rgba(212, 175, 55, 0.12); /* 金色半透明 */
}
.page-products .old-version-border {
  width: 100%;
  height: auto;
  max-width: 800px;
  margin-top: 1rem;
  border: 2px solid var(--gold);
  object-fit: cover;
  display: block;
}

/* 下载须知 */
.page-products .notes-content {
  display: flex;
  align-items: flex-start;
  gap: 1rem;
  background: var(--light-gray);
  padding: 1.5rem;
  border-left: 4px solid var(--red);
}
.page-products .security-icon {
  width: 50px;
  height: 50px;
  flex-shrink: 0;
}
.page-products .notes-text {
  margin: 0;
  font-size: 0.95rem;
  color: var(--dark);
}
.page-products .notes-text a {
  color: var(--red);
  text-decoration: underline;
}
.page-products .region-decoration {
  margin-top: 2rem;
  overflow: hidden;
  max-height: 300px;
}
.page-products .region-bg {
  width: 100%;
  height: auto;
  object-fit: cover;
}

/* 响应式：移动端优先，桌面调整 */
@media (min-width: 768px) {
  .page-products .platform-layout {
    flex-wrap: nowrap;
  }
  .page-products .platform-nav {
    width: var(--platform-nav-width);
    flex-shrink: 0;
  }
  .page-products .platform-nav .nav-list-internal {
    flex-direction: column;
  }
  .page-products .platform-nav .nav-list-internal li a {
    padding: 0.7rem 1rem;
  }
  .page-products .version-card {
    flex-direction: row;
    align-items: center;
  }
  .page-products .version-card .version-card-img {
    width: 300px;
  }
  .page-products .version-card .version-card-info {
    text-align: left;
    flex: 1;
  }
  .page-products .btn-download {
    opacity: 1; /* 桌面默认可见，增强交互 */
  }
  .page-products .process-steps {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
  }
  .page-products .process-image {
    grid-column: 1 / -1;
  }
  .page-products .old-version-table {
    font-size: 1rem;
  }
}

@media (min-width: 1024px) {
  .page-products .page-title {
    font-size: 2.8rem;
  }
  .page-products .process-steps {
    grid-template-columns: 1fr 1fr 1fr;
  }
}