/* ==================== 新闻/帮助页面全新UI ==================== */
/* 设计风格：现代简洁，参考腾讯云/阿里云文档中心 */

:root {
  --nh-primary: #0052d9;
  --nh-primary-light: #e8f0fe;
  --nh-primary-hover: #3d7eff;
  --nh-bg: #f5f7fa;
  --nh-bg-card: #ffffff;
  --nh-text: #1d2129;
  --nh-text-2: #4e5969;
  --nh-text-3: #86909c;
  --nh-border: #e5e6eb;
  --nh-shadow: 0 2px 12px rgba(0,0,0,0.06);
  --nh-radius: 8px;
  --nh-container: 1200px;
}

/* === Banner区 === */
.nh-banner {
  background: linear-gradient(135deg, #0052d9 0%, #3d7eff 50%, #6aa1ff 100%);
  padding: 80px 0 60px;
  position: relative;
  overflow: hidden;
}
.nh-banner::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -20%;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(255,255,255,0.08) 0%, transparent 70%);
  border-radius: 50%;
}
.nh-banner::after {
  content: '';
  position: absolute;
  bottom: -30%;
  left: -10%;
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, rgba(255,255,255,0.05) 0%, transparent 70%);
  border-radius: 50%;
}
.nh-banner-inner {
  max-width: var(--nh-container);
  margin: 0 auto;
  padding: 0 24px;
  position: relative;
  z-index: 1;
}
.nh-banner-title {
  font-size: 32px;
  font-weight: 600;
  color: #fff;
  margin: 0 0 8px;
  letter-spacing: -0.5px;
}
.nh-banner-desc {
  font-size: 15px;
  color: rgba(255,255,255,0.75);
  margin: 0 0 32px;
}

/* 搜索框 */
.nh-search {
  position: relative;
  max-width: 560px;
}
.nh-search input {
  width: 100%;
  height: 48px;
  padding: 0 120px 0 20px;
  border: none;
  border-radius: 8px;
  font-size: 15px;
  color: var(--nh-text);
  background: rgba(255,255,255,0.95);
  backdrop-filter: blur(8px);
  outline: none;
  box-shadow: 0 4px 16px rgba(0,0,0,0.1);
  transition: all 0.2s;
}
.nh-search input:focus {
  background: #fff;
  box-shadow: 0 4px 20px rgba(0,0,0,0.15);
}
.nh-search input::placeholder {
  color: var(--nh-text-3);
}
.nh-search-btn {
  position: absolute;
  right: 6px;
  top: 6px;
  height: 36px;
  padding: 0 20px;
  background: var(--nh-primary);
  color: #fff;
  border: none;
  border-radius: 6px;
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  transition: background 0.2s;
}
.nh-search-btn:hover {
  background: var(--nh-primary-hover);
}

/* === 面包屑 === */
.nh-breadcrumb {
  max-width: var(--nh-container);
  margin: 0 auto;
  padding: 16px 24px;
  font-size: 13px;
  color: var(--nh-text-3);
}
.nh-breadcrumb a {
  color: var(--nh-text-3);
  text-decoration: none;
  transition: color 0.15s;
}
.nh-breadcrumb a:hover {
  color: var(--nh-primary);
}
.nh-breadcrumb .sep {
  margin: 0 8px;
  color: var(--nh-border);
}
.nh-breadcrumb .current {
  color: var(--nh-text-2);
}

/* === 主内容区 === */
.nh-main {
  max-width: var(--nh-container);
  margin: 0 auto;
  padding: 0 24px 60px;
  display: flex;
  gap: 24px;
}

/* 侧边栏 */
.nh-sidebar {
  width: 220px;
  flex-shrink: 0;
}
.nh-sidebar-card {
  background: var(--nh-bg-card);
  border-radius: var(--nh-radius);
  box-shadow: var(--nh-shadow);
  overflow: hidden;
}
.nh-sidebar-title {
  padding: 16px 20px;
  font-size: 14px;
  font-weight: 600;
  color: var(--nh-text);
  border-bottom: 1px solid var(--nh-border);
}
.nh-sidebar-list {
  list-style: none;
  margin: 0;
  padding: 8px 0;
}
.nh-sidebar-list li {
  margin: 0;
}
.nh-sidebar-list a {
  display: block;
  padding: 10px 20px;
  font-size: 14px;
  color: var(--nh-text-2);
  text-decoration: none;
  transition: all 0.15s;
  border-left: 3px solid transparent;
}
.nh-sidebar-list a:hover {
  color: var(--nh-primary);
  background: var(--nh-primary-light);
}
.nh-sidebar-list li.active a {
  color: var(--nh-primary);
  background: var(--nh-primary-light);
  border-left-color: var(--nh-primary);
  font-weight: 500;
}
.nh-sidebar-qr {
  margin-top: 16px;
  background: var(--nh-bg-card);
  border-radius: var(--nh-radius);
  box-shadow: var(--nh-shadow);
  padding: 16px;
  text-align: center;
}
.nh-sidebar-qr img {
  width: 100%;
  border-radius: 4px;
}
.nh-sidebar-qr p {
  margin: 8px 0 0;
  font-size: 12px;
  color: var(--nh-text-3);
}

/* 内容区 */
.nh-content {
  flex: 1;
  min-width: 0;
}

/* 文章列表卡片 */
.nh-article-card {
  background: var(--nh-bg-card);
  border-radius: var(--nh-radius);
  box-shadow: var(--nh-shadow);
  padding: 24px;
  margin-bottom: 16px;
  transition: all 0.2s;
  cursor: pointer;
  text-decoration: none;
  display: block;
}
.nh-article-card:hover {
  box-shadow: 0 4px 20px rgba(0,0,0,0.1);
  transform: translateY(-2px);
}
.nh-article-date {
  display: flex;
  align-items: baseline;
  gap: 4px;
  margin-bottom: 8px;
}
.nh-article-date .day {
  font-size: 28px;
  font-weight: 700;
  color: var(--nh-primary);
  line-height: 1;
}
.nh-article-date .month {
  font-size: 13px;
  color: var(--nh-text-3);
}
.nh-article-title {
  font-size: 16px;
  font-weight: 500;
  color: var(--nh-text);
  margin: 0 0 8px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  transition: color 0.15s;
}
.nh-article-card:hover .nh-article-title {
  color: var(--nh-primary);
}
.nh-article-desc {
  font-size: 14px;
  color: var(--nh-text-3);
  line-height: 1.6;
  margin: 0 0 12px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.nh-article-more {
  font-size: 13px;
  color: var(--nh-primary);
  display: inline-flex;
  align-items: center;
  gap: 4px;
}
.nh-article-more::after {
  content: '\2192';
}

/* 文章详情 */
.nh-detail {
  background: var(--nh-bg-card);
  border-radius: var(--nh-radius);
  box-shadow: var(--nh-shadow);
  padding: 40px;
}
.nh-detail-back {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-size: 14px;
  color: var(--nh-primary);
  text-decoration: none;
  margin-bottom: 24px;
  transition: opacity 0.15s;
}
.nh-detail-back:hover {
  opacity: 0.8;
}
.nh-detail-back::before {
  content: '\2190';
}
.nh-detail-title {
  font-size: 24px;
  font-weight: 600;
  color: var(--nh-text);
  margin: 0 0 16px;
  line-height: 1.4;
}
.nh-detail-meta {
  display: flex;
  gap: 20px;
  font-size: 13px;
  color: var(--nh-text-3);
  margin-bottom: 32px;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--nh-border);
}
.nh-detail-body {
  font-size: 15px;
  color: var(--nh-text-2);
  line-height: 1.8;
  word-wrap: break-word;
  overflow-wrap: break-word;
}
/* 富文本内容样式 */
.nh-detail-body img {
  max-width: 100%;
  height: auto;
  border-radius: 4px;
  margin: 16px 0;
  display: block;
}
.nh-detail-body p {
  margin: 0 0 16px;
  line-height: 1.8;
}
.nh-detail-body h1,
.nh-detail-body h2,
.nh-detail-body h3,
.nh-detail-body h4,
.nh-detail-body h5,
.nh-detail-body h6 {
  color: var(--nh-text);
  margin: 24px 0 12px;
  line-height: 1.4;
}
.nh-detail-body h1 { font-size: 24px; }
.nh-detail-body h2 { font-size: 20px; }
.nh-detail-body h3 { font-size: 18px; }
.nh-detail-body h4 { font-size: 16px; }
.nh-detail-body ul,
.nh-detail-body ol {
  margin: 0 0 16px;
  padding-left: 24px;
}
.nh-detail-body li {
  margin-bottom: 6px;
  line-height: 1.7;
}
.nh-detail-body blockquote {
  margin: 16px 0;
  padding: 12px 20px;
  border-left: 4px solid var(--nh-primary);
  background: var(--nh-primary-light);
  border-radius: 0 4px 4px 0;
  color: var(--nh-text-2);
}
.nh-detail-body blockquote p {
  margin-bottom: 0;
}
.nh-detail-body pre {
  margin: 16px 0;
  padding: 16px;
  background: #1d2129;
  color: #e5e6eb;
  border-radius: 6px;
  overflow-x: auto;
  font-size: 13px;
  line-height: 1.6;
}
.nh-detail-body code {
  padding: 2px 6px;
  background: var(--nh-bg);
  border-radius: 3px;
  font-size: 13px;
  color: #c7254e;
}
.nh-detail-body pre code {
  padding: 0;
  background: none;
  color: inherit;
}
.nh-detail-body table {
  width: 100%;
  border-collapse: collapse;
  margin: 16px 0;
  font-size: 14px;
}
.nh-detail-body th,
.nh-detail-body td {
  border: 1px solid var(--nh-border);
  padding: 10px 14px;
  text-align: left;
  vertical-align: top;
}
.nh-detail-body th {
  background: var(--nh-bg);
  font-weight: 500;
  color: var(--nh-text);
}
.nh-detail-body a {
  color: var(--nh-primary);
  text-decoration: none;
}
.nh-detail-body a:hover {
  text-decoration: underline;
}
.nh-detail-body iframe {
  max-width: 100%;
  margin: 16px 0;
}
.nh-detail-body hr {
  border: none;
  border-top: 1px solid var(--nh-border);
  margin: 24px 0;
}
.nh-detail-body strong,
.nh-detail-body b {
  font-weight: 600;
  color: var(--nh-text);
}
.nh-detail-body div {
  max-width: 100%;
  overflow-x: auto;
}
.nh-detail-body span {
  max-width: 100%;
}
.nh-detail-nav {
  margin-top: 32px;
  padding-top: 24px;
  border-top: 1px solid var(--nh-border);
}
.nh-detail-nav a {
  display: block;
  padding: 8px 0;
  font-size: 14px;
  color: var(--nh-text-2);
  text-decoration: none;
  transition: color 0.15s;
}
.nh-detail-nav a:hover {
  color: var(--nh-primary);
}
.nh-detail-nav .label {
  color: var(--nh-text-3);
  margin-right: 8px;
}

/* 搜索结果提示 */
.nh-search-tip {
  background: var(--nh-bg-card);
  border-radius: var(--nh-radius);
  box-shadow: var(--nh-shadow);
  padding: 16px 24px;
  margin-bottom: 16px;
  font-size: 14px;
  color: var(--nh-text-2);
}
.nh-search-tip strong {
  color: var(--nh-primary);
}

/* 分页 */
.nh-pagination {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 24px 0;
  flex-wrap: wrap;
}
.nh-pagination .total {
  font-size: 13px;
  color: var(--nh-text-3);
  margin-right: auto;
}
.nh-pagination a,
.nh-pagination span {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 36px;
  height: 36px;
  padding: 0 12px;
  border: 1px solid var(--nh-border);
  border-radius: 6px;
  font-size: 14px;
  color: var(--nh-text-2);
  text-decoration: none;
  background: var(--nh-bg-card);
  transition: all 0.15s;
}
.nh-pagination a:hover {
  border-color: var(--nh-primary);
  color: var(--nh-primary);
}
.nh-pagination .active {
  background: var(--nh-primary);
  border-color: var(--nh-primary);
  color: #fff;
}
.nh-pagination .disabled {
  color: var(--nh-text-3);
  cursor: not-allowed;
  background: var(--nh-bg);
}
.nh-pagination .jump {
  border: none;
  background: none;
  font-size: 13px;
  color: var(--nh-text-3);
}
.nh-pagination .jump input {
  width: 48px;
  height: 32px;
  text-align: center;
  border: 1px solid var(--nh-border);
  border-radius: 4px;
  font-size: 13px;
  margin: 0 4px;
  outline: none;
}
.nh-pagination .jump input:focus {
  border-color: var(--nh-primary);
}

/* === 响应式 === */
@media (max-width: 768px) {
  .nh-banner {
    padding: 60px 0 40px;
  }
  .nh-banner-title {
    font-size: 22px;
  }
  .nh-banner-desc {
    font-size: 13px;
    margin-bottom: 24px;
  }
  .nh-search input {
    height: 42px;
    font-size: 14px;
  }
  .nh-search-btn {
    height: 32px;
    padding: 0 14px;
    font-size: 13px;
  }
  .nh-main {
    flex-direction: column;
    padding: 0 16px 40px;
  }
  .nh-sidebar {
    width: 100%;
    order: -1;
  }
  .nh-sidebar-list {
    display: flex;
    flex-wrap: wrap;
    padding: 8px 12px;
    gap: 4px;
  }
  .nh-sidebar-list a {
    padding: 6px 14px;
    border-left: none;
    border-radius: 20px;
    font-size: 13px;
  }
  .nh-sidebar-list li.active a {
    border-left: none;
    background: var(--nh-primary);
    color: #fff;
  }
  .nh-sidebar-qr {
    display: none;
  }
  .nh-article-card {
    padding: 16px;
  }
  .nh-article-date .day {
    font-size: 20px;
  }
  .nh-detail {
    padding: 20px;
  }
  .nh-detail-title {
    font-size: 18px;
  }
  .nh-detail-meta {
    flex-wrap: wrap;
    gap: 10px;
  }
}