:root {
  --bg: #f5f5f5;
  --white: #fff;
  --text: #222;
  --muted: #666;
  --border: #e5e5e5;
  --primary: #1e50ae;
}

html,
body {
  margin: 0;
  padding: 0;
  min-height: 100%;
  font-family: "Helvetica Neue", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", Arial, sans-serif;
  /* background: var(--bg); */
  color: var(--text);
}

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

button {
  cursor: pointer;
}

.page-wrapper {
  max-width: 1200px;
  margin: 0 auto;
}

.nv-header {
  background: #fff;
  position: sticky;
  top: 0;
  z-index: 1000;
  box-shadow: 0 1px 8px rgba(0, 0, 0, 0.06);
}

.nv-header-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 24px;
  gap: 16px;
  flex-wrap: wrap;
}

.nv-logo img {
  height: 48px;
}

.nv-menu-toggle {
  display: none;
  background: transparent;
  border: none;
  font-size: 24px;
  color: var(--text);
}

.nv-nav ul {
  display: flex;
  align-items: center;
  gap: 24px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.nv-nav a {
  color: var(--text);
  text-decoration: none;
  font-size: 14px;
  transition: color .2s;
}

.nv-nav a:hover {
  color: var(--primary);
}

.nv-search {
  display: flex;
  align-items: stretch;
  gap: 8px;
}

.nv-search input {
  padding: 10px 12px;
  border: 1px solid var(--border);
  border-radius: 4px;
  outline: none;
  min-width: 160px;
}

.nv-search button {
  padding: 10px 16px;
  border: 1px solid var(--primary);
  border-radius: 4px;
  background: var(--primary);
  color: #fff;
}

.nv-header-top-image {
  margin: 80px 0 0 0;
  padding: 0;
}

.nv-header-top-image img {
  width: 100%;
  height: auto;
  display: block;
}

.nv-main {
  width: 85%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 20px 24px 40px;
}

.news-detail {
  background: var(--white);
  border-radius: 12px;
  box-shadow: 0 18px 50px rgba(0, 0, 0, 0.08);
  overflow: hidden;
}

.news-detail-header {
  padding: 32px 32px 0 32px;
}

.news-detail-title {
  margin: 0px 0 18px;
  font-size: 32px;
  line-height: 1.3;
  color: #111;
  font-weight: 600;
}

.news-detail-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--border);
}

.news-detail-date {
  color: var(--muted);
  font-size: 14px;
}

.news-detail-share {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 10px 14px;
  border-radius: 6px;
  border: 1px solid var(--border);
  background: #fafafa;
  color: var(--text);
  font-size: 14px;
  transition: all .2s;
}

.news-detail-share img {
  width: 20px;
  height: 20px;
  display: block;
}

.news-detail-share:hover {
  background: #d7271b;
  color: #fff;
  border-color: #d7271b;
}

.news-detail-image {
  margin: 0;
  padding: 0;
}

.news-detail-image img {
  width: 100%;
  height: auto;
  display: block;
}

.news-detail-body {
  padding: 28px 32px 0 32px;
  font-size: 16px;
  line-height: 1.75;
  color: var(--text);
}

.news-detail-body p {
  margin: 0 0 18px;
}

.news-detail-cta {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 16px;
  padding: 28px 32px;
  border-top: 1px solid var(--border);
}

.news-detail-link {
  flex: 1 1 280px;
  background: #f8f9ff;
  border: 1px solid #e6e6ec;
  color: var(--text);
  padding: 16px 20px;
  border-radius: 8px;
  text-decoration: none;
  transition: transform .2s, border-color .2s;
}

.news-detail-link:hover {
  border-color: var(--primary);
  transform: translateY(-2px);
}

.news-detail-link.prev::before {
  content: '上一篇 ';
  font-weight: 500;
  color: var(--primary);
}

.news-detail-link.next::before {
  content: '下一篇 ';
  font-weight: 500;
  color: var(--primary);
}

.related-news {
  padding: 32px 32px 40px 32px;
  border-top: 1px solid var(--border);
  background: #f3f1f4;
}

.related-news-header h2 {
  margin: 0 0 20px;
  font-size: 22px;
  color: #111;
  font-weight: 700;
}

.related-news-grid {
  display: grid;
  gap: 16px;
}

.related-news-row {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}

.related-news-item {
  display: block;
  padding: 18px 20px;
  border-radius: 14px;
  background: #fff;
  border: 1px solid rgba(30, 80, 174, 0.1);
  color: #1e50ae;
  text-decoration: none;
  font-size: 15px;
  line-height: 1.7;
  box-shadow: 0 10px 30px rgba(30, 80, 174, 0.08);
  transition: transform .2s, box-shadow .2s, border-color .2s;
}

.related-news-item:hover {
  transform: translateY(-2px);
  box-shadow: 0 14px 32px rgba(30, 80, 174, 0.14);
  border-color: rgba(30, 80, 174, 0.2);
}

.related-news-empty {
  color: var(--muted);
  font-size: 14px;
  padding: 18px 20px;
  border-radius: 12px;
  background: #fff;
  border: 1px solid var(--border);
}

.news-detail-comment {
  padding: 32px;
}

.comment-title {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 18px;
  color: #111;
}

.comment-row {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  margin-bottom: 16px;
}

.comment-row label {
  flex: 1 1 280px;
  display: flex;
  flex-direction: column;
  font-size: 14px;
  color: var(--muted);
}

.comment-row input,
.comment-row textarea {
  margin-top: 8px;
  padding: 12px 14px;
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: 14px;
  outline: none;
}

.comment-row textarea {
  min-height: 120px;
  resize: vertical;
}

.comment-captcha {
  align-items: center;
  gap: 16px;
}

.comment-captcha img {
  height: 42px;
  border-radius: 6px;
  border: 1px solid var(--border);
  object-fit: cover;
}

.comment-submit {
  border: none;
  padding: 14px 26px;
  border-radius: 8px;
  background: var(--primary);
  color: #fff;
  font-size: 15px;
  font-weight: 600;
}

.nv-footer {
  padding: 24px 24px 40px;
  background: #fff;
  border-top: 1px solid var(--border);
}

.nv-footer-content {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  color: var(--muted);
  font-size: 14px;
}

.nv-footer-content a {
  color: var(--muted);
  text-decoration: none;
}

.nv-footer-content a:hover {
  color: var(--primary);
}

.nv-modal {
  position: fixed;
  left: 0;
  top: 0;
  width: 100%;
  height: 100%;
  display: none;
  align-items: center;
  justify-content: center;
  background: rgba(0, 0, 0, 0.55);
  padding: 24px;
  z-index: 2000;
}

.nv-modal[aria-hidden="false"] {
  display: flex;
}

.nv-modal-panel {
  background: #fff;
  border-radius: 14px;
  max-width: 420px;
  width: 100%;
  padding: 28px 24px;
  position: relative;
  text-align: center;
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.2);
}

.nv-modal-close {
  position: absolute;
  top: 18px;
  right: 18px;
  border: none;
  background: transparent;
  font-size: 24px;
  color: #999;
  cursor: pointer;
}

.nv-modal-title {
  font-size: 18px;
  font-weight: 600;
  color: #111;
  margin-bottom: 18px;
}

.nv-qr-image {
  width: 260px;
  height: 260px;
  margin: 0 auto 18px;
  border: 1px solid var(--border);
  border-radius: 12px;
}

.nv-modal-content p {
  margin: 0;
  font-size: 14px;
  color: var(--muted);
}

@media (max-width: 860px) {
  .nv-header-top {
    padding: 16px;
  }

  .nv-nav ul {
    flex-wrap: wrap;
    gap: 12px;
  }

  .nv-search {
    width: 100%;
  }

  .nv-main {
    width: 99%;
  }
}

@media (max-width: 720px) {
  .nv-menu-toggle {
    display: block;
  }

  .nv-nav {
    width: 100%;
    display: none;
  }

  .nv-nav.open {
    display: block;
  }

  .nv-nav ul {
    flex-direction: column;
    gap: 12px;
  }

  .news-detail-header {
    padding: 24px 20px 0;
  }

  .news-detail-body,
  .news-detail-image,
  .news-detail-cta,
  .news-detail-comment {
    padding: 0 20px;
  }

  .news-detail-cta {
    flex-direction: column;
  }

  .related-news-row {
    grid-template-columns: 1fr;
  }

  .comment-row {
    flex-direction: column;
  }

  .comment-captcha {
    align-items: flex-start;
  }

  .nv-footer {
    padding: 24px 20px 32px;
  }

  .nv-main {
    width: 100%;
  }
}