/* ========================================
   新闻列表页
   ======================================== */

/* CSS Reset */
*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  font-size: 16px;
  line-height: 1.75;
  color: #1f2937;
  background: #f9fafb;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

a {
  text-decoration: none;
  color: inherit;
  transition: color 0.25s ease, background-color 0.25s ease, border-color 0.25s ease, transform 0.25s ease, box-shadow 0.25s ease;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

ul, ol {
  list-style: none;
}

/* 容器 */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ========================================
   头部导航 - 商用风格
   ======================================== */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 72px;
  background: #ffffff;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05);
  z-index: 1000;
}

.header .container {
  height: 100%;
  display: flex;
  align-items: center;
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
}

.header-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  line-height: 0;
  position: relative;
}

.header-logo-img {
  width: auto;
  height: 44px;
  max-width: 220px;
  object-fit: contain;
  display: block;
}

.logo-tooltip {
  position: absolute;
  top: calc(100% + 10px);
  left: 50%;
  transform: translateX(-50%) translateY(4px);
  padding: 4px 8px !important;
  line-height: 1.4;
  font-size: 12px;
  font-weight: 600;
  color: #ffffff;
  background: #1f2937;
  border-radius: 6px;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
  white-space: nowrap;
  opacity: 0;
  visibility: hidden;
  transition: all 0.15s ease;
  z-index: 1000;
}

.logo-tooltip::before {
  content: '';
  position: absolute;
  top: -5px;
  left: 50%;
  transform: translateX(-50%);
  border-left: 5px solid transparent;
  border-right: 5px solid transparent;
  border-bottom: 5px solid #1f2937;
}

.header-logo:hover .logo-tooltip {
  opacity: 1;
  visibility: visible;
  transform: translateX(-50%) translateY(0);
}

.header-right {
  display: flex;
  align-items: center;
  gap: 12px;
}

.header .search-box {
  position: relative;
}

.header .search-input {
  width: 240px;
  height: 40px;
  padding: 0 44px 0 14px;
  font-size: 14px;
  color: #1f2937;
  background: #f9fafb;
  border: 1px solid #e5e7eb;
  border-radius: 8px;
  transition: all 0.25s ease;
  outline: none;
}

.header .search-input::placeholder {
  color: #9ca3af;
}

.header .search-input:focus {
  border-color: #3b82f6;
  background: #ffffff;
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

.header .search-icon {
  width: 16px;
  height: 16px;
  color: #9ca3af;
}

.header .search-submit {
  position: absolute;
  right: 14px;
  top: 50%;
  transform: translateY(-50%);
  width: 20px;
  height: 20px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 0;
  background: transparent;
  padding: 0;
  cursor: pointer;
  color: #9ca3af;
}

.header .search-submit:hover {
  color: #374151;
}

.search-empty {
  text-align: center;
  padding: 60px 20px;
  background: #ffffff;
  border: 1px solid #e5e7eb;
  border-radius: 12px;
}

.search-empty-icon {
  width: 48px;
  height: 48px;
  margin: 0 auto 16px;
  color: #d1d5db;
}

.search-empty-icon svg {
  width: 100%;
  height: 100%;
}

.search-empty-text {
  font-size: 15px;
  color: #6b7280;
  margin-bottom: 20px;
}

.header-back {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 40px;
  gap: 6px;
  padding: 0 14px;
  font-size: 14px;
  font-weight: 500;
  color: #4b5563;
  background: #f9fafb;
  border: 1px solid #e5e7eb;
  border-radius: 8px;
  transition: color 0.25s ease, background-color 0.25s ease, border-color 0.25s ease;
}

.header-back:hover {
  background: #f3f4f6;
  border-color: #d1d5db;
  color: #111827;
}

/* ========================================
   主内容区布局
   ======================================== */
.main {
  padding-top: 100px;
  padding-bottom: 100px;
}

.main.main-list {
  padding-bottom: 24px;
}

.main-layout {
  display: grid;
  grid-template-columns: 1fr 300px;
  gap: 32px;
  align-items: start;
}

/* ========================================
   新闻卡片
   ======================================== */
.news-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
  padding-top: 0;
  margin-top: 0;
}

.news-card {
  display: flex;
  gap: 28px;
  padding: 28px;
  background: #ffffff;
  border: 1px solid #e5e7eb;
  border-radius: 12px;
  transition: border-color 0.25s ease, box-shadow 0.25s ease, transform 0.25s ease;
  cursor: pointer;
}

.news-card:hover {
  border-color: #d1d5db;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.06);
  transform: translateY(-2px);
}

.news-card-content {
  flex: 1;
  min-width: 0;
}

.news-card-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 12px;
}

.news-category {
  display: inline-flex;
  align-items: center;
  padding: 4px 12px;
  font-size: 12px;
  font-weight: 600;
  border-radius: 6px;
  background: #f3f4f6;
  color: #4b5563;
  letter-spacing: 0.01em;
}

.news-category.important {
  background: #fef2f2;
  color: #dc2626;
}

.news-category.notice {
  background: #fffbeb;
  color: #d97706;
}

.news-category.news-category-icon {
  width: 22px;
  height: 22px;
  padding: 0;
  justify-content: center;
  border-radius: 999px;
}

.news-category.news-category-icon svg {
  width: 13px;
  height: 13px;
}

.news-category.news-category-icon.has-tooltip {
  position: relative;
}

.news-category.news-category-icon.has-tooltip::after {
  content: attr(data-tooltip);
  position: absolute;
  top: calc(100% + 10px);
  left: 50%;
  transform: translateX(-50%) translateY(4px);
  padding: 4px 8px;
  line-height: 1.4;
  font-size: 12px;
  font-weight: 600;
  color: #ffffff;
  background: #1f2937;
  border-radius: 6px;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
  white-space: nowrap;
  opacity: 0;
  visibility: hidden;
  transition: all 0.15s ease;
  z-index: 1000;
  pointer-events: none;
}

.news-category.news-category-icon.has-tooltip::before {
  content: '';
  position: absolute;
  top: calc(100% + 5px);
  left: 50%;
  transform: translateX(-50%) translateY(4px);
  border-left: 5px solid transparent;
  border-right: 5px solid transparent;
  border-bottom: 5px solid #1f2937;
  opacity: 0;
  visibility: hidden;
  transition: all 0.15s ease;
  z-index: 1000;
  pointer-events: none;
}

.news-category.news-category-icon.has-tooltip:hover::after,
.news-category.news-category-icon.has-tooltip:hover::before {
  opacity: 1;
  visibility: visible;
  transform: translateX(-50%) translateY(0);
}

.news-date {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  color: #9ca3af;
}

.news-card-title {
  font-size: 19px;
  font-weight: 600;
  color: #111827;
  line-height: 1.5;
  margin-bottom: 10px;
  transition: color 0.25s ease;
}

.news-card-title.is-bold {
  font-weight: 700;
}

.news-card-title.is-italic {
  font-style: italic;
}

.news-card-title.is-top {
  letter-spacing: 0.01em;
}

.news-card:hover .news-card-title {
  color: #2563eb;
}

.news-card-summary {
  font-size: 14px;
  color: #6b7280;
  line-height: 1.7;
  margin-bottom: 16px;
}

.news-card-footer {
  display: flex;
  align-items: center;
  gap: 24px;
}

.news-stat {
  font-size: 13px;
  color: #9ca3af;
}

.news-card-image {
  flex-shrink: 0;
  width: 220px;
  height: 150px;
  aspect-ratio: 22 / 15;
  border-radius: 8px;
  overflow: hidden;
  background: #f3f4f6;
}

.news-card-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.3s ease;
}

.news-card:hover .news-card-image img {
  transform: scale(1.03);
}

/* ========================================
   详情页
   ======================================== */
.detail-main {
  position: relative;
  background: #ffffff;
  border: 1px solid #e5e7eb;
  border-radius: 12px;
  padding: 28px;
  min-height: 800px;
}

.detail-back-btn {
  position: absolute;
  top: 30px;
  right: 28px;
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 6px 12px;
  font-size: 13px;
  font-weight: 500;
  color: #6b7280;
  background: #f9fafb;
  border: none;
  border-radius: 6px;
  transition: all 0.25s ease;
}

.detail-back-btn:hover {
  color: #2563eb;
  background: #eff6ff;
}

.detail-back-btn.has-tooltip::after {
  content: attr(data-tooltip);
  position: absolute;
  top: calc(100% + 10px);
  left: 50%;
  transform: translateX(-50%) translateY(4px);
  padding: 4px 8px;
  line-height: 1.4;
  font-size: 12px;
  font-weight: 600;
  color: #ffffff;
  background: #1f2937;
  border-radius: 6px;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
  white-space: nowrap;
  opacity: 0;
  visibility: hidden;
  transition: all 0.15s ease;
  z-index: 1000;
  pointer-events: none;
}

.detail-back-btn.has-tooltip::before {
  content: '';
  position: absolute;
  top: calc(100% + 5px);
  left: 50%;
  transform: translateX(-50%) translateY(4px);
  border-left: 5px solid transparent;
  border-right: 5px solid transparent;
  border-bottom: 5px solid #1f2937;
  opacity: 0;
  visibility: hidden;
  transition: all 0.15s ease;
  z-index: 1000;
  pointer-events: none;
}

.detail-back-btn.has-tooltip:hover::after,
.detail-back-btn.has-tooltip:hover::before {
  opacity: 1;
  visibility: visible;
  transform: translateX(-50%) translateY(0);
}

.detail-meta-row {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 14px;
}



.detail-title {
  font-size: 24px;
  line-height: 1.45;
  font-weight: 700;
  color: #111827;
  margin-bottom: 24px;
  padding-right: 80px;
}

.detail-title-center {
  text-align: center;
}

.detail-title.is-bold {
  font-weight: 700;
}

.detail-title.is-italic {
  font-style: italic;
}

.detail-content {
  color: #374151;
  line-height: 1.9;
  word-break: break-word;
}

.detail-content > * + * {
  margin-top: 14px;
}

.detail-content img {
  max-width: 100%;
  border-radius: 8px;
  height: auto;
}


/* ========================================
   侧边栏
   ======================================== */
.sidebar {
  position: sticky;
  top: 100px;
  height: fit-content;
  display: flex;
  flex-direction: column;
  gap: 28px;
  padding-top: 0;
  margin-top: 0;
}

.sidebar-card {
  background: #ffffff;
  border: 1px solid #e5e7eb;
  border-radius: 12px;
  padding: 20px;
}

.sidebar-title {
  font-size: 13px;
  font-weight: 600;
  color: #9ca3af;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 16px;
  padding-left: 4px;
}

.sidebar-nav {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.sidebar-tree {
  padding: 0;
}

.sidebar-tree-children {
  margin: -8px 0 0 14px;
  padding: 0 0 0 12px;
  border-left: none;
}

.sidebar-link {
  display: flex;
  align-items: center;
  justify-content: flex-start;
  min-height: 34px;
  padding: 6px 2px;
  font-size: 14px;
  font-weight: 500;
  color: #334155;
  border: none;
  background: transparent;
  transition: all 0.2s ease;
}

.sidebar-tree > .sidebar-link {
  padding-left: 16px;
}

.sidebar-link:hover {
  color: #0f172a;
  background: #eff6ff;
}

.sidebar-link.active {
  background: #eff6ff;
  color: #1d4ed8;
  font-weight: 600;
  border-radius: 6px;
}

.sidebar-link-essence {
  display: block;
  min-height: 0;
  position: relative;
  padding-left: 14px;
}

.sidebar-link-essence::before {
  content: '·';
  position: absolute;
  left: 2px;
  top: 6px;
  line-height: 1;
}

.essence-title {
  display: -webkit-box;
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 2;
  overflow: hidden;
  line-height: 1.6;
}

.sidebar-link-child {
  font-size: 13px;
  font-weight: 400;
  color: #475569;
  padding: 5px 2px;
  border: none;
  position: relative;
}

.sidebar-link-child:hover {
  background: transparent;
  color: #0f172a;
}

.sidebar-link-child.active {
  background: transparent;
  color: #1d4ed8;
  font-weight: 600;
}

.sidebar-link-child::before {
  content: '·';
  width: auto;
  height: auto;
  margin-right: 9px;
  display: inline-block;
  flex-shrink: 0;
  color: #94a3b8;
}

.sidebar-link-child.active::before {
  content: '·';
  color: #1d4ed8;
}

.sidebar-copyright {
  font-size: 12px;
  color: #9ca3af;
  text-align: center;
  padding-top: 8px;
}

/* ========================================
   分页
   ======================================== */
.pagination {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 4px;
  margin-top: 48px;
}

.pagination-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  min-width: 40px;
  height: 40px;
  padding: 0 14px;
  font-size: 14px;
  font-weight: 400;
  color: #374151;
  background: #f3f4f6;
  border: none;
  border-radius: 6px;
  cursor: pointer;
  transition: background-color 0.2s ease, color 0.2s ease;
}

.pagination-btn:link,
.pagination-btn:visited {
  color: #374151;
}

.pagination-btn svg {
  stroke: currentColor;
}

.pagination-btn:hover:not(:disabled) {
  background: #374151;
  color: #ffffff;
}

.pagination-btn.active {
  background: #1f2937;
  color: #ffffff;
  font-weight: 500;
}

.pagination-ellipsis {
  padding: 0 8px;
  color: #d1d5db;
}

/* ========================================
   响应式
   ======================================== */
@media (max-width: 1024px) {
  .main-layout {
    grid-template-columns: 1fr;
    gap: 36px;
  }

  .sidebar {
    position: static;
    order: -1;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
  }
}

@media (max-width: 768px) {
  body {
    font-size: 15px;
    line-height: 1.7;
    background: #f8fafc;
  }

  .container {
    padding: 0 14px;
  }

  .header {
    height: auto;
  }

  .header .container {
    align-items: stretch;
  }

  .header-inner {
    min-height: 64px;
    gap: 12px;
  }

  .header-logo-img {
    height: 35px;
    max-width: 155px;
  }

  .logo-tooltip,
  .header-back {
    display: none;
  }

  .header-right {
    display: none;
  }

  .main {
    padding-top: 88px;
    padding-bottom: 48px;
  }

  .main.main-list {
    padding-bottom: 48px;
  }

  .main-layout {
    gap: 0;
  }

  .news-list {
    gap: 12px;
  }

  .news-card {
    flex-direction: column-reverse;
    gap: 14px;
    padding: 16px;
    border-radius: 14px;
  }

  .news-card-image {
    width: 100%;
    height: auto;
    aspect-ratio: 16 / 9;
    border-radius: 10px;
  }

  .news-card-meta {
    gap: 8px;
    margin-bottom: 8px;
  }

  .news-card-title {
    font-size: 17px;
    line-height: 1.45;
    margin-bottom: 8px;
  }

  .news-card-summary {
    font-size: 13px;
    line-height: 1.65;
    margin-bottom: 12px;
  }

  .detail-main {
    padding: 18px;
    min-height: 0;
    border-radius: 14px;
  }

  .detail-back-btn {
    position: static;
    width: 34px;
    height: 34px;
    padding: 0;
    margin-bottom: 14px;
    justify-content: center;
    border-radius: 999px;
    background: #f8fafc;
  }

  .detail-back-btn::before,
  .detail-back-btn::after {
    display: none;
  }

  .detail-title {
    font-size: 21px;
    line-height: 1.45;
    padding-right: 0;
    margin-bottom: 16px;
  }

  .detail-title-center {
    text-align: left;
  }

  .detail-meta-row {
    gap: 8px;
    margin-bottom: 16px;
  }

  .detail-content {
    font-size: 15px;
    line-height: 1.85;
  }

  .sidebar {
    display: none;
  }

  .pagination {
    margin-top: 28px;
    gap: 6px;
    flex-wrap: wrap;
  }

  .pagination-btn {
    min-width: 36px;
    height: 36px;
    padding: 0 12px;
  }
}