* {
  box-sizing: border-box;
}

body {
  margin: 0;
  color: #1f2933;
  background: #f7f8f5;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  line-height: 1.75;
}

a {
  color: #1d5f73;
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

.site-header {
  background: #163c43;
  color: #fff;
  padding: 34px 20px 28px;
}

.wrap {
  max-width: 980px;
  margin: 0 auto;
}

.site-header h1,
.site-header p {
  margin: 0;
}

.site-header h1 {
  font-size: 32px;
  line-height: 1.25;
  font-weight: 720;
}

.site-header p {
  max-width: 760px;
  margin-top: 12px;
  color: #dce8e7;
}

.nav {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 22px;
  font-size: 14px;
}

.nav a {
  color: #fff;
  border-bottom: 1px solid rgba(255, 255, 255, 0.5);
}

.notice {
  border-left: 4px solid #b86b2f;
  background: #fff7ed;
  padding: 14px 16px;
  margin: 28px 0;
}

main {
  padding: 28px 20px 48px;
}

.article-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 16px;
  padding: 0;
  margin: 24px 0;
  list-style: none;
}

.article-card {
  min-height: 210px;
  padding: 18px;
  background: #fff;
  border: 1px solid #d8ded8;
  border-radius: 8px;
}

.article-card h2 {
  margin: 0 0 10px;
  font-size: 20px;
  line-height: 1.35;
}

.article-card p {
  margin: 0 0 12px;
  color: #4b5563;
}

.meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 18px 0;
  color: #5b6470;
  font-size: 14px;
}

.tag {
  display: inline-block;
  padding: 2px 8px;
  border: 1px solid #cbd5d6;
  border-radius: 999px;
  background: #fff;
}

article {
  max-width: 860px;
  margin: 0 auto;
  background: #fff;
  border: 1px solid #d8ded8;
  border-radius: 8px;
  padding: 30px;
}

article h1 {
  margin: 0 0 12px;
  font-size: 30px;
  line-height: 1.28;
}

article h2 {
  margin-top: 30px;
  font-size: 21px;
  line-height: 1.4;
}

article ul {
  padding-left: 22px;
}

.statement {
  margin-top: 32px;
  padding: 16px;
  background: #f3f7f7;
  border: 1px solid #d8e4e5;
  border-radius: 6px;
  color: #39464e;
}

.footer {
  padding: 22px 20px 36px;
  color: #647079;
  font-size: 14px;
}

.footer p {
  margin: 0 0 8px;
}

.footer a {
  color: #4b5c68;
  text-decoration: none;
}

.footer a:hover {
  color: #0f6b7c;
  text-decoration: underline;
}

@media (max-width: 640px) {
  .site-header h1,
  article h1 {
    font-size: 25px;
  }

  article {
    padding: 22px 18px;
  }
}


.platform-bar {
  position: sticky;
  top: 0;
  z-index: 10;
  background: #ffffff;
  border-bottom: 1px solid #e6eaf0;
  box-shadow: 0 1px 5px rgba(15, 23, 42, 0.06);
}

.platform-inner {
  max-width: 1260px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  gap: 72px;
  height: 48px;
  padding: 0 24px;
}

.platform-logo {
  color: #e11d24;
  font-size: 20px;
  font-weight: 800;
}

.platform-nav a {
  color: #202a35;
  font-size: 17px;
}

.page-shell {
  max-width: 1260px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: minmax(0, 1fr) 330px;
  gap: 24px;
  padding: 24px;
}

.content-main {
  background: #fff;
  padding: 34px 38px 44px;
  border: 1px solid #e2e8f0;
}

.section-title h1 {
  margin: 0;
  font-size: 30px;
  line-height: 1.25;
  text-align: center;
}

.section-title p {
  margin: 18px auto 28px;
  max-width: 900px;
  color: #526170;
  text-align: center;
}

.content-main .feature-article,
.content-main .news-item {
  max-width: none;
  margin: 0 0 16px;
  padding: 30px 44px;
  background: #fff;
  border: 1px solid #d8ded8;
  border-radius: 8px;
}

.feature-article h2,
.news-item h2 {
  margin: 10px 0 12px;
  font-size: 26px;
  line-height: 1.35;
}

.feature-article p,
.news-item p {
  margin: 0;
  color: #4b5563;
  font-size: 18px;
  line-height: 1.85;
}

.feature-meta,
.news-item span,
.latest-list span {
  color: #9aa4b2;
  font-size: 14px;
}

.core-section {
  margin: 28px 0 36px;
}

.core-heading,
.list-heading {
  margin: 28px 0 16px;
  padding-left: 16px;
  border-left: 5px solid #1d6fe8;
}

.core-heading h2,
.list-heading h2 {
  margin: 0;
  font-size: 24px;
  line-height: 1.35;
}

.core-heading p {
  margin: 8px 0 0;
  color: #526170;
}

.core-item {
  border-color: #b8d4df;
  background: #fbfdfe;
}

.core-item h2::before {
  content: "核心";
  display: inline-block;
  margin-right: 10px;
  padding: 2px 7px;
  border: 1px solid #1d5f73;
  border-radius: 4px;
  color: #1d5f73;
  font-size: 14px;
  line-height: 1.4;
  vertical-align: middle;
}

.pagination {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 8px;
  margin: 30px 0 0;
  padding-top: 22px;
  border-top: 1px solid #e6eaf0;
}

.pagination a,
.pagination span {
  min-width: 38px;
  padding: 7px 11px;
  border: 1px solid #d7dee8;
  background: #fff;
  color: #526170;
  text-align: center;
}

.pagination .current {
  border-color: #1d5f73;
  background: #1d5f73;
  color: #fff;
  font-weight: 700;
}

.pagination .disabled {
  color: #a8b2bf;
  background: #f6f8fa;
}

.sidebar {
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.side-box {
  background: #fff;
  border: 1px solid #e2e8f0;
  padding: 18px 20px;
}

.side-box h2 {
  margin: 0 0 14px;
  padding-left: 12px;
  border-left: 5px solid #1d6fe8;
  font-size: 20px;
  line-height: 1.3;
}

.side-box p {
  margin: 0;
  color: #526170;
}

.latest-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.latest-list li {
  padding: 13px 0;
  border-bottom: 1px solid #eef2f6;
}

.latest-list li:last-child {
  border-bottom: 0;
}

.latest-list a {
  display: block;
  color: #4b5563;
}

.category-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.category-tags span {
  display: inline-block;
  padding: 4px 9px;
  border: 1px solid #d7dee8;
  color: #526170;
  background: #f8fafc;
}

.page-shell-footer {
  max-width: 1260px;
  margin: 0 auto;
}

@media (max-width: 920px) {
  .page-shell {
    grid-template-columns: 1fr;
    padding: 16px;
  }

  .content-main {
    padding: 24px 18px 32px;
  }

  .content-main .feature-article,
  .content-main .news-item {
    padding: 24px 18px;
  }

  .feature-article h2,
  .news-item h2 {
    font-size: 22px;
  }

  .feature-article p,
  .news-item p {
    font-size: 16px;
  }

  .platform-inner {
    gap: 28px;
  }
}