/* ==========================================================================
   Now加速机场官网 - 知识库与文章详情专用样式 (Article & Knowledge Hub Styles)
   Mediterranean Summer Resort Reading Experience
   ========================================================================== */

/* --------------------------------------------------------------------------
   Knowledge Hub Directory (knowledge.html)
   -------------------------------------------------------------------------- */
.hub-hero {
  padding: 50px 0 40px;
  text-align: center;
  position: relative;
}

.hub-hero-title {
  font-size: 2.8rem;
  font-weight: 900;
  color: var(--color-azure-deep);
  line-height: 1.2;
  margin-bottom: 16px;
}

.hub-hero-desc {
  font-size: 1.1rem;
  color: var(--color-text-muted);
  max-width: 720px;
  margin: 0 auto 32px;
  line-height: 1.7;
}

.hub-search-bar {
  max-width: 600px;
  margin: 0 auto;
  position: relative;
}

.hub-search-input {
  width: 100%;
  padding: 16px 24px 16px 52px;
  font-size: 1rem;
  border-radius: var(--radius-full);
  border: 2px solid rgba(0, 47, 167, 0.15);
  background: #ffffff;
  box-shadow: var(--shadow-md);
  outline: none;
  transition: var(--transition-fast);
}

.hub-search-input:focus {
  border-color: var(--color-azure-deep);
  box-shadow: 0 10px 30px rgba(0, 47, 167, 0.15);
}

.hub-search-icon {
  position: absolute;
  left: 20px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 1.2rem;
  color: var(--color-azure-deep);
}

.category-filter-bar {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  flex-wrap: wrap;
  margin: 36px 0 48px;
}

.cat-chip {
  padding: 8px 18px;
  border-radius: var(--radius-full);
  font-size: 0.9rem;
  font-weight: 700;
  border: 1.5px solid rgba(0, 47, 167, 0.12);
  background: #ffffff;
  color: var(--color-text-muted);
  cursor: pointer;
  transition: var(--transition-fast);
}

.cat-chip:hover {
  border-color: var(--color-azure-deep);
  color: var(--color-azure-deep);
}

.cat-chip.active {
  background: var(--color-azure-deep);
  color: #ffffff;
  border-color: var(--color-azure-deep);
  box-shadow: var(--shadow-sm);
}

/* Article Cards Grid in Hub */
.article-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 30px;
  margin-bottom: 80px;
}

.article-card {
  background: #ffffff;
  border-radius: var(--radius-lg);
  border: 1.5px solid rgba(0, 47, 167, 0.08);
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  transition: var(--transition-normal);
  text-decoration: none;
  position: relative;
}

.article-card:hover {
  transform: translateY(-6px);
  border-color: rgba(0, 47, 167, 0.28);
  box-shadow: var(--shadow-xl);
}

.article-card-cover {
  height: 180px;
  background: linear-gradient(135deg, #002FA7 0%, #0284c7 100%);
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #ffffff;
  overflow: hidden;
}

.article-card-cover::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: radial-gradient(circle at 80% 20%, rgba(255, 210, 0, 0.3) 0%, transparent 60%);
}

.card-cover-icon {
  font-size: 3.5rem;
  position: relative;
  z-index: 1;
  transition: transform 0.4s ease;
}

.article-card:hover .card-cover-icon {
  transform: scale(1.15) rotate(5deg);
}

.card-category-tag {
  position: absolute;
  top: 14px;
  left: 14px;
  background: rgba(255, 255, 255, 0.92);
  color: var(--color-azure-deep);
  font-size: 0.75rem;
  font-weight: 800;
  padding: 3px 10px;
  border-radius: var(--radius-full);
  z-index: 2;
  box-shadow: 0 2px 6px rgba(0,0,0,0.1);
}

.article-card-body {
  padding: 24px;
  display: flex;
  flex-direction: column;
  flex-grow: 1;
}

.card-meta-row {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 0.78rem;
  color: var(--color-text-light);
  margin-bottom: 12px;
}

.card-meta-row span {
  display: flex;
  align-items: center;
  gap: 4px;
}

.article-card-title {
  font-size: 1.2rem;
  font-weight: 800;
  color: var(--color-azure-deep);
  line-height: 1.45;
  margin-bottom: 12px;
  transition: var(--transition-fast);
}

.article-card:hover .article-card-title {
  color: #0050d8;
}

.article-card-excerpt {
  font-size: 0.9rem;
  color: var(--color-text-muted);
  line-height: 1.65;
  margin-bottom: 20px;
  flex-grow: 1;
}

.article-card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 14px;
  border-top: 1px dashed rgba(0, 47, 167, 0.1);
}

.card-read-more {
  color: var(--color-azure-deep);
  font-size: 0.88rem;
  font-weight: 800;
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.card-keywords-tags {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
}

.kw-badge {
  background: var(--color-azure-soft);
  color: var(--color-azure-deep);
  font-size: 0.68rem;
  font-weight: 700;
  padding: 2px 7px;
  border-radius: 4px;
}

/* --------------------------------------------------------------------------
   Article Detail Page Layout (articles/article-xxx.html)
   -------------------------------------------------------------------------- */
.reading-progress-bar {
  position: fixed;
  top: 74px;
  left: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--color-azure-deep), var(--color-lemon-bright));
  width: 0%;
  z-index: 102;
  transition: width 0.1s linear;
}

.article-wrapper {
  padding: 40px 0 90px;
}

.breadcrumbs {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.88rem;
  color: var(--color-text-muted);
  margin-bottom: 24px;
}

.breadcrumbs a {
  color: var(--color-azure-deep);
  font-weight: 600;
}

.breadcrumbs a:hover {
  text-decoration: underline;
}

.breadcrumbs .sep {
  color: var(--color-text-light);
}

.article-layout {
  display: grid;
  grid-template-columns: 1fr 310px;
  gap: 48px;
  align-items: flex-start;
}

/* Article Main Content */
.article-main {
  background: #ffffff;
  border-radius: var(--radius-xl);
  padding: 48px 52px;
  box-shadow: var(--shadow-md);
  border: 1.5px solid rgba(0, 47, 167, 0.08);
}

.article-header {
  margin-bottom: 38px;
  padding-bottom: 28px;
  border-bottom: 2px solid rgba(0, 47, 167, 0.08);
}

.article-tag-list {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin-bottom: 16px;
}

.article-h1 {
  font-size: 2.35rem;
  font-weight: 900;
  color: var(--color-azure-deep);
  line-height: 1.3;
  margin-bottom: 20px;
}

.article-meta-bar {
  display: flex;
  align-items: center;
  gap: 20px;
  font-size: 0.88rem;
  color: var(--color-text-muted);
  flex-wrap: wrap;
}

.article-meta-item {
  display: flex;
  align-items: center;
  gap: 6px;
}

.article-banner-callout {
  background: linear-gradient(135deg, rgba(0, 47, 167, 0.04) 0%, rgba(255, 210, 0, 0.1) 100%);
  border-left: 4px solid var(--color-lemon-bright);
  padding: 18px 24px;
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  margin-bottom: 36px;
}

.banner-callout-title {
  font-weight: 800;
  color: var(--color-azure-deep);
  font-size: 1rem;
  margin-bottom: 6px;
}

.banner-callout-text {
  font-size: 0.94rem;
  color: var(--color-text-muted);
  line-height: 1.6;
}

/* Typography Inside Article Body */
.article-body {
  font-size: 1.05rem;
  color: var(--color-text-main);
  line-height: 1.85;
}

.article-body h2 {
  font-size: 1.7rem;
  font-weight: 900;
  color: var(--color-azure-deep);
  margin: 44px 0 18px;
  padding-bottom: 10px;
  border-bottom: 1.5px solid rgba(0, 47, 167, 0.12);
  display: flex;
  align-items: center;
  gap: 10px;
}

.article-body h2::before {
  content: "";
  display: inline-block;
  width: 5px;
  height: 22px;
  background: var(--color-lemon-bright);
  border-radius: 4px;
}

.article-body h3 {
  font-size: 1.35rem;
  font-weight: 800;
  color: var(--color-azure-deep);
  margin: 32px 0 14px;
}

.article-body p {
  margin-bottom: 22px;
  text-align: justify;
}

.article-body ul, .article-body ol {
  margin: 18px 0 24px 24px;
}

.article-body ul li {
  list-style-type: disc;
  margin-bottom: 10px;
}

.article-body ol li {
  list-style-type: decimal;
  margin-bottom: 10px;
}

.article-body strong {
  color: var(--color-azure-deep);
  font-weight: 800;
}

.article-body blockquote {
  background: var(--color-sandstone-warm);
  border-left: 4px solid var(--color-azure-deep);
  padding: 16px 20px;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  margin: 26px 0;
  font-style: italic;
  color: var(--color-text-muted);
}

/* Table Style */
.article-table-wrap {
  overflow-x: auto;
  margin: 28px 0;
  border-radius: var(--radius-md);
  border: 1px solid rgba(0, 47, 167, 0.12);
}

.article-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 0.94rem;
}

.article-table th {
  background: var(--color-azure-deep);
  color: #ffffff;
  padding: 14px 18px;
  font-weight: 700;
}

.article-table td {
  padding: 12px 18px;
  border-bottom: 1px solid rgba(0, 47, 167, 0.08);
  color: var(--color-text-main);
}

.article-table tr:nth-child(even) {
  background: rgba(0, 47, 167, 0.02);
}

/* Code Snippet Box */
.code-box {
  background: #0f172a;
  color: #e2e8f0;
  border-radius: var(--radius-md);
  padding: 20px 24px;
  margin: 24px 0;
  font-family: Consolas, Monaco, "Courier New", monospace;
  font-size: 0.92rem;
  overflow-x: auto;
  position: relative;
  line-height: 1.6;
}

.code-box-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 12px;
  padding-bottom: 8px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  color: #94a3b8;
  font-size: 0.78rem;
}

/* In-Article Promotion Card */
.article-promo-card {
  background: repeating-linear-gradient(
    -45deg,
    #002FA7 0px,
    #002FA7 30px,
    #002482 30px,
    #002482 60px
  );
  color: #ffffff;
  border-radius: var(--radius-lg);
  padding: 32px 36px;
  margin: 44px 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  border: 2px solid var(--color-lemon-bright);
  box-shadow: var(--shadow-lg);
}

.article-promo-card h3 {
  font-size: 1.45rem;
  font-weight: 900;
  margin-bottom: 8px;
  color: #ffffff;
}

.article-promo-card p {
  color: #e0f2fe;
  font-size: 0.94rem;
  margin-bottom: 0;
}

/* Sidebar / Aside */
.article-sidebar {
  position: sticky;
  top: 96px;
  display: flex;
  flex-direction: column;
  gap: 26px;
}

.sidebar-card {
  background: #ffffff;
  border-radius: var(--radius-lg);
  padding: 26px;
  border: 1.5px solid rgba(0, 47, 167, 0.08);
  box-shadow: var(--shadow-sm);
}

.sidebar-title {
  font-size: 1.1rem;
  font-weight: 800;
  color: var(--color-azure-deep);
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.toc-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.toc-link {
  font-size: 0.88rem;
  color: var(--color-text-muted);
  line-height: 1.45;
  padding: 4px 0 4px 10px;
  border-left: 2px solid transparent;
  transition: var(--transition-fast);
}

.toc-link:hover, .toc-link.active {
  color: var(--color-azure-deep);
  font-weight: 700;
  border-left-color: var(--color-azure-deep);
}

.sidebar-cta-box {
  background: linear-gradient(135deg, var(--color-sandstone-warm), rgba(255, 210, 0, 0.15));
  border: 2px solid var(--color-lemon-bright);
  text-align: center;
}

.sidebar-cta-box h4 {
  font-size: 1.15rem;
  font-weight: 900;
  color: var(--color-azure-deep);
  margin-bottom: 10px;
}

.sidebar-cta-box p {
  font-size: 0.84rem;
  color: var(--color-text-muted);
  margin-bottom: 16px;
  line-height: 1.5;
}

/* Responsive Media Queries */
@media (max-width: 1050px) {
  .article-layout {
    grid-template-columns: 1fr;
  }

  .article-sidebar {
    position: static;
  }

  .article-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 680px) {
  .article-main {
    padding: 28px 20px;
  }

  .article-h1 {
    font-size: 1.75rem;
  }

  .article-grid {
    grid-template-columns: 1fr;
  }

  .article-promo-card {
    flex-direction: column;
    text-align: center;
    padding: 24px;
  }
}