/* === Global Reset & Tokens === */
:root {
  --c-primary: #1a7a4a;
  --c-primary-dark: #0f5c36;
  --c-primary-light: #2ea066;
  --c-accent: #d4a017;
  --c-accent-dark: #b8880e;
  --c-bg: #f8faf9;
  --c-surface: #ffffff;
  --c-text: #1a1a1a;
  --c-text-muted: #5a6a5e;
  --c-border: #e2e8e4;
  --c-footer-bg: #0f2e1c;
  --c-footer-text: #c8d9ce;
  --radius: 6px;
  --shadow-sm: 0 1px 3px rgba(0,0,0,.08);
  --shadow-md: 0 4px 16px rgba(0,0,0,.10);
  --max-w: 1200px;
}
*,*::before,*::after { box-sizing: border-box; margin: 0; padding: 0; }
html { font-size: 16px; scroll-behavior: smooth; }
body {
  font-family: "PingFang SC","Microsoft YaHei","Helvetica Neue",Arial,sans-serif;
  background: var(--c-bg);
  color: var(--c-text);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; height: auto; display: block; }
ul { list-style: none; }
button { cursor: pointer; border: none; background: none; font: inherit; }

/* === Layout === */
.container { max-width: var(--max-w); margin: 0 auto; padding: 0 1.25rem; }

/* === Header === */
.site-header {
  background: var(--c-surface);
  border-bottom: 1px solid var(--c-border);
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: var(--shadow-sm);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
  gap: 1.5rem;
}
.site-logo {
  display: flex;
  align-items: center;
  gap: .6rem;
  flex-shrink: 0;
}
.site-logo img { height: 36px; width: auto; }
.site-logo-text {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--c-primary);
  letter-spacing: .02em;
  line-height: 1.2;
}
.main-nav { display: flex; align-items: center; gap: .25rem; }
.main-nav a {
  padding: .4rem .85rem;
  border-radius: var(--radius);
  font-size: .9rem;
  font-weight: 500;
  color: var(--c-text-muted);
  transition: background .2s, color .2s;
}
.main-nav a:hover, .main-nav a[aria-current="page"] {
  background: var(--c-primary);
  color: #fff;
}
.mobile-menu-btn {
  display: none;
  padding: .5rem;
  font-size: 1.4rem;
  color: var(--c-primary);
}
.mobile-nav {
  display: none;
  flex-direction: column;
  background: var(--c-surface);
  border-top: 1px solid var(--c-border);
  padding: .75rem 1.25rem 1rem;
  gap: .25rem;
}
.mobile-nav a {
  padding: .55rem .75rem;
  border-radius: var(--radius);
  font-size: .9rem;
  font-weight: 500;
  color: var(--c-text-muted);
}
.mobile-nav a:hover { background: var(--c-primary); color: #fff; }
@media (max-width: 768px) {
  .main-nav { display: none; }
  .mobile-menu-btn { display: block; }
  .mobile-nav.open { display: flex; }
}

/* === Footer === */
.site-footer {
  background: var(--c-footer-bg);
  color: var(--c-footer-text);
  padding: 2.5rem 0 1.5rem;
  margin-top: 4rem;
}
.footer-inner {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 2.5rem;
  margin-bottom: 2rem;
}
.footer-brand p { font-size: .85rem; line-height: 1.7; margin-top: .75rem; opacity: .8; }
.footer-col h4 { font-size: .85rem; font-weight: 700; text-transform: uppercase; letter-spacing: .08em; margin-bottom: .75rem; color: #a8c4b0; }
.footer-col ul { display: flex; flex-direction: column; gap: .4rem; }
.footer-col a { font-size: .875rem; opacity: .8; transition: opacity .2s; }
.footer-col a:hover { opacity: 1; }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,.1);
  padding-top: 1.25rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: .8rem;
  opacity: .65;
}
@media (max-width: 768px) {
  .footer-inner { grid-template-columns: 1fr; gap: 1.5rem; }
  .footer-bottom { flex-direction: column; gap: .5rem; text-align: center; }
}

/* === Hero Section === */
.hero {
  background: linear-gradient(135deg, var(--c-primary-dark) 0%, var(--c-primary) 60%, var(--c-primary-light) 100%);
  color: #fff;
  padding: 3.5rem 0;
  position: relative;
  overflow: hidden;
}
.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='60' height='60'%3E%3Ccircle cx='30' cy='30' r='1.5' fill='rgba(255,255,255,.07)'/%3E%3C/svg%3E") repeat;
  pointer-events: none;
}
.hero-inner { position: relative; display: grid; grid-template-columns: 1fr 1fr; gap: 3rem; align-items: center; }
.hero-text h1 { font-size: clamp(1.6rem, 3vw, 2.4rem); font-weight: 800; line-height: 1.2; margin-bottom: 1rem; }
.hero-text p { font-size: 1rem; opacity: .9; margin-bottom: 1.5rem; max-width: 42ch; }
.hero-cta {
  display: inline-flex;
  align-items: center;
  gap: .5rem;
  background: var(--c-accent);
  color: #1a1a1a;
  font-weight: 700;
  font-size: .95rem;
  padding: .7rem 1.5rem;
  border-radius: var(--radius);
  transition: background .2s, transform .15s;
}
.hero-cta:hover { background: var(--c-accent-dark); transform: translateY(-1px); }
.hero-img { border-radius: 12px; overflow: hidden; box-shadow: var(--shadow-md); }
.hero-img img { width: 100%; height: auto; aspect-ratio: 4/3; object-fit: cover; }
@media (max-width: 768px) {
  .hero-inner { grid-template-columns: 1fr; }
  .hero-img { order: -1; }
}

/* === Section Headings === */
.section { padding: 3.5rem 0; }
.section:nth-child(even) { background: var(--c-surface); }
.section-title {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--c-primary-dark);
  margin-bottom: .35rem;
}
.section-sub {
  font-size: .9rem;
  color: var(--c-text-muted);
  margin-bottom: 2rem;
}

/* === Article Cards (Grid) === */
.article-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 1.5rem;
}
.article-card {
  background: var(--c-surface);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--c-border);
  transition: box-shadow .2s, transform .2s;
  display: flex;
  flex-direction: column;
}
.article-card:hover { box-shadow: var(--shadow-md); transform: translateY(-2px); }
.article-card-img { overflow: hidden; }
.article-card-img img { width: 100%; height: 180px; object-fit: cover; transition: transform .3s; }
.article-card:hover .article-card-img img { transform: scale(1.04); }
.article-card-body { padding: 1.1rem 1.2rem 1.2rem; flex: 1; display: flex; flex-direction: column; }
.article-card-meta { font-size: .75rem; color: var(--c-text-muted); margin-bottom: .4rem; }
.article-card-title {
  font-size: 1rem;
  font-weight: 700;
  color: var(--c-text);
  line-height: 1.4;
  margin-bottom: .6rem;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.article-card-title a:hover { color: var(--c-primary); }
.article-card-desc {
  font-size: .85rem;
  color: var(--c-text-muted);
  line-height: 1.6;
  flex: 1;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.article-card-footer { margin-top: .9rem; padding-top: .75rem; border-top: 1px solid var(--c-border); }
.read-more {
  font-size: .82rem;
  font-weight: 600;
  color: var(--c-primary);
  display: inline-flex;
  align-items: center;
  gap: .3rem;
}
.read-more:hover { color: var(--c-primary-dark); }

/* === News List (timeline style) === */
.news-list { display: flex; flex-direction: column; gap: .1rem; }
.news-item {
  display: grid;
  grid-template-columns: 100px 1fr auto;
  align-items: center;
  gap: 1.25rem;
  padding: 1rem 1.25rem;
  border-radius: var(--radius);
  transition: background .15s;
}
.news-item:hover { background: rgba(26,122,74,.05); }
.news-date { font-size: .8rem; font-weight: 600; color: var(--c-text-muted); white-space: nowrap; }
.news-title { font-size: .9rem; font-weight: 500; color: var(--c-text); }
.news-title:hover { color: var(--c-primary); }
.news-tag {
  font-size: .72rem;
  padding: .2rem .6rem;
  border-radius: 20px;
  background: var(--c-primary);
  color: #fff;
  white-space: nowrap;
  font-weight: 600;
}
@media (max-width: 640px) {
  .news-item { grid-template-columns: 1fr; gap: .3rem; }
  .news-tag { justify-self: start; }
}

/* === Data Highlight Blocks === */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.25rem;
}
.stat-card {
  background: var(--c-surface);
  border: 1px solid var(--c-border);
  border-radius: var(--radius);
  padding: 1.5rem;
  text-align: center;
  box-shadow: var(--shadow-sm);
}
.stat-num {
  font-size: 2rem;
  font-weight: 800;
  color: var(--c-primary);
  line-height: 1;
  margin-bottom: .35rem;
}
.stat-label { font-size: .82rem; color: var(--c-text-muted); }
@media (max-width: 640px) {
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
}

/* === Category Nav Pills === */
.cat-pills { display: flex; gap: .5rem; flex-wrap: wrap; margin-bottom: 1.75rem; }
.cat-pill {
  padding: .4rem 1rem;
  border-radius: 20px;
  font-size: .85rem;
  font-weight: 600;
  border: 1.5px solid var(--c-border);
  color: var(--c-text-muted);
  background: var(--c-surface);
  transition: all .2s;
}
.cat-pill:hover, .cat-pill.active { background: var(--c-primary); border-color: var(--c-primary); color: #fff; }

/* === CTA Section === */
.cta-section {
  background: linear-gradient(135deg, var(--c-primary-dark), var(--c-primary));
  color: #fff;
  padding: 3rem 0;
  text-align: center;
}
.cta-section h2 { font-size: 1.6rem; font-weight: 800; margin-bottom: .75rem; }
.cta-section p { opacity: .9; margin-bottom: 1.5rem; max-width: 50ch; margin-left: auto; margin-right: auto; }
.cta-btn {
  display: inline-block;
  background: var(--c-accent);
  color: #1a1a1a;
  font-weight: 700;
  font-size: 1rem;
  padding: .75rem 2rem;
  border-radius: var(--radius);
  transition: background .2s, transform .15s;
}
.cta-btn:hover { background: var(--c-accent-dark); transform: translateY(-1px); }

/* === Article Detail Page === */
.article-layout {
  display: grid;
  grid-template-columns: 1fr 300px;
  gap: 2.5rem;
  align-items: start;
  padding: 2.5rem 0;
}
.article-main { min-width: 0; }
.article-header { margin-bottom: 1.75rem; }
.breadcrumb { font-size: .8rem; color: var(--c-text-muted); margin-bottom: .75rem; display: flex; gap: .4rem; align-items: center; flex-wrap: wrap; }
.breadcrumb a { color: var(--c-primary); }
.breadcrumb a:hover { text-decoration: underline; }
.breadcrumb span { opacity: .5; }
.article-h1 { font-size: clamp(1.3rem, 2.5vw, 1.8rem); font-weight: 800; line-height: 1.3; color: var(--c-text); margin-bottom: .75rem; }
.article-meta-bar { font-size: .8rem; color: var(--c-text-muted); display: flex; gap: 1rem; flex-wrap: wrap; }
.article-hero-img { border-radius: var(--radius); overflow: hidden; margin-bottom: 1.75rem; }
.article-hero-img img { width: 100%; height: auto; max-height: 400px; object-fit: cover; }
.article-body { font-size: .95rem; line-height: 1.85; color: var(--c-text); }
.article-body h2 { font-size: 1.2rem; font-weight: 700; color: var(--c-primary-dark); margin: 2rem 0 .75rem; padding-top: .5rem; border-top: 1px solid var(--c-border); }
.article-body h3 { font-size: 1.05rem; font-weight: 700; color: var(--c-text); margin: 1.5rem 0 .5rem; }
.article-body p { margin-bottom: 1rem; }
.article-body ul, .article-body ol { margin: .75rem 0 1rem 1.25rem; }
.article-body li { margin-bottom: .35rem; list-style: disc; }
.article-body ol li { list-style: decimal; }
.article-body strong { font-weight: 700; color: var(--c-primary-dark); }
.article-body img { border-radius: var(--radius); margin: 1.25rem 0; }
.article-faq { margin-top: 2rem; background: rgba(26,122,74,.06); border-radius: var(--radius); padding: 1.5rem; border: 1px solid rgba(26,122,74,.15); }
.article-faq h3 { font-size: 1rem; font-weight: 700; color: var(--c-primary-dark); margin-bottom: .75rem; }
.faq-item { margin-bottom: .75rem; padding-bottom: .75rem; border-bottom: 1px solid rgba(26,122,74,.1); }
.faq-item:last-child { border-bottom: none; margin-bottom: 0; padding-bottom: 0; }
.faq-q { font-weight: 700; color: var(--c-text); margin-bottom: .3rem; font-size: .9rem; }
.faq-a { font-size: .85rem; color: var(--c-text-muted); line-height: 1.65; }

/* === Sidebar === */
.sidebar { position: sticky; top: 84px; }
.sidebar-widget { background: var(--c-surface); border: 1px solid var(--c-border); border-radius: var(--radius); padding: 1.25rem; margin-bottom: 1.25rem; box-shadow: var(--shadow-sm); }
.sidebar-widget h3 { font-size: .9rem; font-weight: 700; color: var(--c-primary-dark); margin-bottom: .75rem; padding-bottom: .5rem; border-bottom: 2px solid var(--c-primary); }
.related-list { display: flex; flex-direction: column; gap: .6rem; }
.related-item { display: flex; gap: .75rem; align-items: flex-start; }
.related-thumb { width: 70px; height: 52px; object-fit: cover; border-radius: 4px; flex-shrink: 0; }
.related-title { font-size: .82rem; font-weight: 600; color: var(--c-text); line-height: 1.4; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.related-item:hover .related-title { color: var(--c-primary); }

/* === Category Page === */
.category-header {
  background: linear-gradient(135deg, var(--c-primary-dark), var(--c-primary));
  color: #fff;
  padding: 2.5rem 0;
  margin-bottom: 2.5rem;
}
.category-header h1 { font-size: 1.8rem; font-weight: 800; margin-bottom: .4rem; }
.category-header p { font-size: .9rem; opacity: .85; }

/* === Page-level responsive === */
@media (max-width: 1024px) {
  .article-layout { grid-template-columns: 1fr; }
  .sidebar { position: static; }
}
@media (max-width: 768px) {
  .article-grid { grid-template-columns: 1fr; }
  .section { padding: 2.5rem 0; }
  .hero { padding: 2.5rem 0; }
}