:root {
  color-scheme: light;
  --ink: #172033;
  --muted: #637083;
  --line: #dce4ec;
  --panel: #ffffff;
  --soft: #f4f7f9;
  --brand: #087f5b;
  --brand-dark: #065f46;
  --accent: #dff7ed;
  --shadow: 0 16px 40px rgba(28, 47, 68, .08);
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; background: var(--soft); color: var(--ink); font: 16px/1.75 system-ui, -apple-system, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif; }
a { color: var(--brand-dark); text-decoration: none; }
a:hover { text-decoration: underline; }
.site-header { background: rgba(255,255,255,.96); border-bottom: 1px solid var(--line); position: sticky; top: 0; z-index: 10; backdrop-filter: blur(12px); }
.header-inner { max-width: 1160px; margin: auto; min-height: 68px; padding: 12px 24px; display: flex; gap: 24px; align-items: center; justify-content: space-between; }
.brand { color: var(--ink); font-size: 19px; font-weight: 800; white-space: nowrap; }
nav { display: flex; flex-wrap: wrap; gap: 7px 18px; font-size: 14px; }
nav a { color: #405064; }
.hero { background: linear-gradient(135deg,#083c32,#087f5b 58%,#18a676); color: #fff; padding: 72px 24px; }
.hero-inner { max-width: 1160px; margin: auto; }
.hero .eyebrow { margin: 0 0 10px; font-weight: 700; color: #baf2dd; letter-spacing: .08em; }
.hero h1 { max-width: 920px; margin: 0; font-size: clamp(34px,6vw,62px); line-height: 1.12; letter-spacing: -.035em; }
.hero p { max-width: 700px; margin: 22px 0 0; color: #ddf8ee; font-size: 18px; }
.page-shell, .home-section { max-width: 1040px; margin: auto; padding: 30px 24px 64px; }
.home-section.wide { max-width: 1160px; }
.section-head { display: flex; justify-content: space-between; align-items: end; gap: 16px; margin: 10px 0 22px; }
.section-head h2 { margin: 0; font-size: 27px; line-height: 1.25; }
.section-head p { margin: 0; color: var(--muted); }
.category-grid { display: grid; grid-template-columns: repeat(3,minmax(0,1fr)); gap: 16px; }
.category-card, .article-list li, .article-card { background: var(--panel); border: 1px solid var(--line); border-radius: 16px; box-shadow: var(--shadow); }
.category-card { padding: 24px; min-height: 154px; transition: transform .18s ease, border-color .18s ease; }
.category-card:hover { transform: translateY(-3px); border-color: #9ed8c4; text-decoration: none; }
.category-card h3 { margin: 0 0 8px; color: var(--ink); }
.category-card p { margin: 0; color: var(--muted); }
.article-list { list-style: none; display: grid; gap: 12px; margin: 0; padding: 0; }
.article-list li { padding: 20px 22px; }
.article-list h2, .article-list h3 { margin: 0 0 5px; line-height: 1.45; }
.article-list p { margin: 0; color: var(--muted); }
.breadcrumb { color: var(--muted); font-size: 14px; margin: 0 0 14px; }
.article-card { overflow: hidden; }
.article-head { padding: 38px clamp(24px,7vw,72px) 28px; border-bottom: 1px solid var(--line); background: linear-gradient(180deg,#fff,#fbfdfc); }
.article-head h1 { margin: 0; font-size: clamp(29px,5vw,46px); line-height: 1.22; letter-spacing: -.025em; }
.article-meta { margin: 16px 0 0; color: var(--muted); font-size: 14px; }
.article-body { max-width: 780px; margin: auto; padding: 32px clamp(24px,7vw,72px) 48px; }
.article-body h2 { margin: 34px 0 10px; font-size: 23px; line-height: 1.4; }
.article-body p { margin: 0 0 18px; }
.article-body .note { margin-top: 34px; padding: 15px 18px; border-left: 4px solid var(--brand); border-radius: 8px; background: var(--accent); color: #28564a; font-size: 14px; }
.article-actions { padding: 20px clamp(24px,7vw,72px); border-top: 1px solid var(--line); background: #fbfdfc; }
.site-footer { border-top: 1px solid var(--line); padding: 26px 24px; color: var(--muted); text-align: center; font-size: 14px; }
.empty { color: var(--muted); padding: 22px; border: 1px dashed #b8c4d0; border-radius: 12px; }
@media (max-width: 820px) {
  .header-inner { align-items: flex-start; flex-direction: column; gap: 8px; }
  nav { gap: 5px 14px; }
  .hero { padding: 52px 20px; }
  .category-grid { grid-template-columns: 1fr; }
  .section-head { align-items: flex-start; flex-direction: column; }
  .page-shell, .home-section { padding-left: 16px; padding-right: 16px; }
  .article-head { padding-top: 28px; }
}