:root{
  --primary:#14342B;
  --primary-dark:#0E261E;
  --primary-700:#1B4A3A;
  --accent:#2E6B4F;
  --bg:#ffffff;
  --bg-soft:#F2F6F4;
  --bg-soft2:#E7EFEA;
  --text:#1f2a26;
  --muted:#5b6b64;
  --border:#DCE6E1;
  --maxw:1100px;
  --radius:12px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",Roboto,Helvetica,Arial,sans-serif;
  color:var(--text);
  background:var(--bg);
  line-height:1.75;
  font-size:16px;
}
img{max-width:100%;height:auto}
a{color:var(--primary);text-decoration:none}
a:hover{color:var(--accent)}
.container{max-width:var(--maxw);margin:0 auto;padding:0 20px}
.skip-link{position:absolute;left:-9999px;top:0;background:var(--primary);color:#fff;padding:8px 14px;z-index:100}
.skip-link:focus{left:8px;top:8px}

/* ---------- Header ---------- */
.site-header{
  position:sticky;top:0;z-index:50;
  background:rgba(255,255,255,.95);
  backdrop-filter:saturate(180%) blur(8px);
  border-bottom:1px solid var(--border);
}
.site-header__inner{display:flex;align-items:center;justify-content:space-between;height:64px}
.brand{display:flex;align-items:center;gap:10px;font-weight:700;color:var(--primary);font-size:18px}
.brand__text{letter-spacing:.5px}
.site-nav ul{display:flex;gap:4px;list-style:none;margin:0;padding:0}
.site-nav a{display:block;padding:8px 14px;border-radius:8px;color:var(--text);font-weight:500}
.site-nav a:hover{background:var(--bg-soft);color:var(--primary)}
.site-nav a.is-active{background:var(--primary);color:#fff}
.nav-toggle{display:none;background:none;border:0;font-size:22px;color:var(--primary);cursor:pointer}

/* ---------- Hero ---------- */
.hero{background:linear-gradient(160deg,var(--primary),var(--primary-dark));color:#fff;padding:72px 0}
.hero__eyebrow{letter-spacing:3px;text-transform:uppercase;color:#9fc4b3;font-size:13px;margin:0 0 12px}
.hero__title{font-size:38px;margin:0 0 16px;line-height:1.25}
.hero__lead{max-width:680px;color:#dcefe6;font-size:17px;margin:0 0 28px}
.hero__cta{display:flex;gap:14px;flex-wrap:wrap}
.btn{display:inline-block;padding:12px 22px;border-radius:999px;font-weight:600;border:1.5px solid transparent;cursor:pointer;font-size:15px}
.btn--primary{background:#fff;color:var(--primary)}
.btn--primary:hover{background:var(--bg-soft)}
.btn--ghost{border-color:rgba(255,255,255,.6);color:#fff}
.btn--ghost:hover{background:rgba(255,255,255,.12);color:#fff}

/* ---------- Sections / cards ---------- */
.section{padding:56px 0}
.section__title{font-size:26px;margin:0 0 8px;color:var(--primary)}
.section__head{display:flex;align-items:baseline;justify-content:space-between;gap:16px;flex-wrap:wrap}
.section__sub{color:var(--muted);margin:0 0 24px}
.link-more{color:var(--accent);font-weight:600;white-space:nowrap}
.card-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:20px}
.card{background:var(--bg-soft);border:1px solid var(--border);border-radius:var(--radius);padding:24px;color:var(--text);transition:.2s;display:block}
.card:hover{transform:translateY(-3px);border-color:var(--primary);box-shadow:0 8px 24px rgba(20,52,43,.08)}
.card__icon{display:inline-flex;align-items:center;justify-content:center;width:52px;height:52px;border-radius:12px;background:var(--primary);color:#fff;margin-bottom:14px}
.card__icon--lg{width:64px;height:64px;margin-bottom:18px}
.card h3{margin:0 0 8px;font-size:19px}
.card p{margin:0;color:var(--muted);font-size:15px}

/* ---------- Articles ---------- */
.article-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:22px}
.article-card{background:#fff;border:1px solid var(--border);border-radius:var(--radius);padding:22px;display:flex;flex-direction:column;gap:10px}
.article-card h3{margin:0;font-size:18px;line-height:1.4}
.article-card h3 a{color:var(--text)}
.article-card p{margin:0;color:var(--muted);font-size:15px;flex:1}
.article-card time{color:var(--muted);font-size:13px}
.tag{display:inline-block;background:var(--bg-soft2);color:var(--primary-700);font-size:13px;padding:3px 10px;border-radius:999px;font-weight:600}
.article-card .tag:hover{background:var(--primary);color:#fff}

/* ---------- Prose (文章正文) ---------- */
.prose{max-width:760px}
.prose h2{color:var(--primary);font-size:22px;margin:32px 0 12px}
.prose h3{color:var(--primary);font-size:18px;margin:24px 0 10px}
.prose p{margin:0 0 16px}
.prose ul,.prose ol{padding-left:22px;margin:0 0 16px}
.prose li{margin:6px 0}

/* ---------- Breadcrumb / filters ---------- */
.breadcrumb{font-size:14px;color:var(--muted);margin-bottom:18px}
.breadcrumb a{color:var(--muted)}
.breadcrumb span{color:var(--text)}
.resource-filter{display:flex;gap:10px;margin:18px 0}
.resource-filter input{flex:1;padding:11px 14px;border:1px solid var(--border);border-radius:10px;font-size:15px}
.cat-filter{display:flex;flex-wrap:wrap;gap:8px;margin:8px 0 28px}
.cat-filter a{padding:7px 14px;border:1px solid var(--border);border-radius:999px;color:var(--text);font-size:14px}
.cat-filter a.is-active,.cat-filter a:hover{background:var(--primary);color:#fff;border-color:var(--primary)}

/* ---------- FAQ ---------- */
.faq-block{max-width:820px;margin-top:24px}
.faq-item{border:1px solid var(--border);border-radius:10px;padding:4px 18px;margin-bottom:12px;background:#fff}
.faq-item summary{cursor:pointer;font-weight:600;padding:12px 0;color:var(--primary);list-style:none}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::before{content:"＋";color:var(--accent);margin-right:10px;font-weight:700}
.faq-item[open] summary::before{content:"－"}
.faq-item__a{padding:0 0 14px;color:var(--muted)}

/* ---------- Contact / alerts ---------- */
.contact-form{max-width:560px;display:grid;gap:14px;margin-top:18px}
.contact-form label{display:grid;gap:6px;font-weight:600;color:var(--primary)}
.contact-form input,.contact-form textarea{padding:11px 14px;border:1px solid var(--border);border-radius:10px;font:inherit;font-weight:400}
.contact-form .hp{position:absolute;left:-9999px;width:1px;height:1px;overflow:hidden}
.alert{padding:12px 16px;border-radius:10px;font-weight:600}
.alert--ok{background:#E7EFEA;color:var(--primary-700);border:1px solid var(--accent)}
.alert--warn{background:#FBF3E6;color:#8a5a00;border:1px solid #e0b060}

/* ---------- Article detail ---------- */
.article-detail__head{max-width:760px;margin-bottom:8px}
.article-detail__meta{color:var(--muted);font-size:14px;margin:12px 0 0}
.article-tags{display:flex;gap:8px;flex-wrap:wrap;margin:28px 0;max-width:760px}
.related{max-width:760px;margin-top:28px;border-top:1px solid var(--border);padding-top:20px}
.related ul{padding-left:20px}
.cta-line{margin-top:24px}

/* ---------- Footer ---------- */
.site-footer{background:var(--primary);color:#cfe3da;margin-top:40px;padding:48px 0 24px}
.site-footer__inner{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:28px}
.site-footer h3{color:#fff;font-size:17px;margin:0 0 12px}
.site-footer ul{list-style:none;margin:0;padding:0}
.site-footer li{margin:6px 0}
.site-footer a{color:#cfe3da}
.site-footer a:hover{color:#fff}
.site-footer__slogan{color:#9fc4b3;font-size:14px;margin:6px 0 12px}
.site-footer__brand .brand{display:inline-flex;align-items:center;text-decoration:none;margin-bottom:8px}
.site-footer__logo{height:auto;max-width:240px;width:100%;background:#fff;padding:10px 14px;border-radius:6px;display:block}
.site-footer__brand a:hover .site-footer__logo{opacity:.92}
.site-footer__bottom{border-top:1px solid rgba(255,255,255,.12);margin-top:28px;padding-top:18px;display:flex;flex-wrap:wrap;gap:14px;justify-content:space-between;font-size:13px;color:#9fc4b3}
.site-footer__bottom a{color:#cfe3da}

/* ---------- Responsive ---------- */
@media (max-width:760px){
  .nav-toggle{display:block}
  .site-nav{position:absolute;top:64px;left:0;right:0;background:#fff;border-bottom:1px solid var(--border);display:none}
  .site-nav.is-open{display:block}
  .site-nav ul{flex-direction:column;padding:8px}
  .hero__title{font-size:30px}
}