/* Global styles for xinenergycharge.com */
:root{--primary:#22c55e;--primary-dark:#16a34a;--text:#1f2937;--text-light:#6b7280;--bg:#ffffff;--bg-alt:#f9fafb;--border:#e5e7eb;--radius:12px}
*{margin:0;padding:0;box-sizing:border-box}
body{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;color:var(--text);line-height:1.6}
.container{max-width:1200px;margin:0 auto;padding:0 20px}
a{text-decoration:none;color:inherit}
.site-header{position:sticky;top:0;background:rgba(255,255,255,0.95);backdrop-filter:blur(10px);border-bottom:1px solid var(--border);z-index:100}
.site-header .container{display:flex;align-items:center;justify-content:space-between;height:68px}
.logo{display:flex;align-items:center;gap:10px;font-size:1.3rem;font-weight:700;color:var(--primary)}
.logo img{width:44px;height:44px;border-radius:8px}
.main-nav{display:flex;gap:28px}
.main-nav a{font-size:0.95rem;color:var(--text);font-weight:500;transition:color 0.2s}
.main-nav a:hover{color:var(--primary)}
.hero{position:relative;min-height:580px;display:flex;align-items:center;overflow:hidden;background:#0f172a}
.hero-bg{position:absolute;inset:0;background-size:cover;background-position:center;opacity:0.35}
.hero-content{position:relative;z-index:1;color:#fff;max-width:620px}
.hero-content h1{font-size:3.2rem;font-weight:800;line-height:1.15;margin-bottom:20px;letter-spacing:-0.02em}
.hero-content p{font-size:1.2rem;opacity:0.85;margin-bottom:32px;line-height:1.7}
.hero-btns{display:flex;gap:16px}
.btn{display:inline-flex;align-items:center;padding:14px 28px;border-radius:var(--radius);font-weight:600;font-size:1rem;transition:all 0.2s;cursor:pointer;border:none}
.btn-primary{background:var(--primary);color:#fff}
.btn-primary:hover{background:var(--primary-dark);transform:translateY(-2px)}
.btn-outline{background:transparent;color:#fff;border:2px solid rgba(255,255,255,0.4)}
.btn-outline:hover{border-color:#fff}
.features{padding:96px 0;background:var(--bg)}
.section-header{text-align:center;margin-bottom:56px}
.section-header h2{font-size:2.2rem;font-weight:700;margin-bottom:12px}
.section-header p{font-size:1.1rem;color:var(--text-light)}
.feature-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:32px}
.feature-card{background:var(--bg-alt);border-radius:var(--radius);overflow:hidden;transition:transform 0.3s,box-shadow 0.3s}
.feature-card:hover{transform:translateY(-4px);box-shadow:0 12px 40px rgba(0,0,0,0.08)}
.feature-icon{height:200px;overflow:hidden}
.feature-icon img{width:100%;height:100%;object-fit:cover}
.feature-card h3{padding:20px 24px 8px;font-size:1.2rem;font-weight:700}
.feature-card p{padding:0 24px 24px;color:var(--text-light);font-size:0.95rem}
.stats{padding:72px 0;background:var(--primary);color:#fff;text-align:center}
.stats-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:40px}
.stat-number{font-size:2.8rem;font-weight:800;margin-bottom:8px}
.stat-label{font-size:1rem;opacity:0.85}
.articles-preview{padding:96px 0;background:var(--bg-alt)}
.article-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:32px}
.article-card{background:var(--bg);border-radius:var(--radius);overflow:hidden;transition:transform 0.3s,box-shadow 0.3s}
.article-card:hover{transform:translateY(-4px);box-shadow:0 12px 40px rgba(0,0,0,0.08)}
.article-card a{display:block}
.article-card img{width:100%;height:200px;object-fit:cover;transition:transform 0.3s}
.article-card:hover img{transform:scale(1.05)}
.article-card h3{padding:16px 20px 8px;font-size:1.05rem;line-height:1.4}
.article-card p{padding:0 20px 20px;color:var(--text-light);font-size:0.9rem;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.article-meta{display:flex;align-items:center;gap:12px;padding:12px 20px 0}
.tag{background:var(--primary);color:#fff;font-size:0.75rem;padding:3px 10px;border-radius:20px;font-weight:600}
time{font-size:0.8rem;color:var(--text-light)}
.section-footer{text-align:center;margin-top:48px}
.cta{padding:80px 0;background:linear-gradient(135deg,#0f172a 0%,#1e3a5f 100%);color:#fff;text-align:center}
.cta h2{font-size:2.2rem;font-weight:700;margin-bottom:16px}
.cta p{font-size:1.1rem;opacity:0.85;margin-bottom:32px;max-width:560px;margin-left:auto;margin-right:auto}
.site-footer{background:#1f2937;color:#fff;padding:64px 0 0}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1.5fr;gap:48px;padding-bottom:48px;border-bottom:1px solid rgba(255,255,255,0.1)}
.footer-logo{display:flex;align-items:center;gap:10px;font-size:1.2rem;font-weight:700;margin-bottom:16px}
.footer-logo img{border-radius:6px}
.footer-col h4{font-size:1rem;font-weight:600;margin-bottom:16px}
.footer-col ul{list-style:none}
.footer-col li{margin-bottom:10px}
.footer-col a{opacity:0.7;transition:opacity 0.2s;font-size:0.9rem}
.footer-col a:hover{opacity:1}
.footer-col p{font-size:0.9rem;opacity:0.7;margin-bottom:8px}
.footer-bottom{text-align:center;padding:24px 0;font-size:0.85rem;opacity:0.5}
@media(max-width:768px){
  .hero-content h1{font-size:2.2rem}
  .feature-grid,.article-grid,.stats-grid{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr}
  .main-nav{gap:16px}
  .main-nav a{font-size:0.85rem}
  .site-header .container{flex-wrap:wrap;height:auto;padding:12px 20px;gap:8px}
}