*{margin:0;padding:0;box-sizing:border-box;}
html{scroll-behavior:smooth;scroll-padding-top:20px;}
body{font-family:"PingFang SC","Microsoft YaHei",sans-serif;background:#f8f9fa;color:#333;-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility;}

/* 头部 */
.header{background:linear-gradient(135deg,#c0392b 0%,#8b1a1a 100%);color:#fff;padding:60px 20px;text-align:center;position:relative;overflow:hidden;contain:layout;}
.header::after{content:'';position:absolute;bottom:0;left:15%;right:15%;height:1px;background:linear-gradient(90deg,transparent,rgba(255,255,255,.3),transparent);}
.header h1{font-size:42px;margin-bottom:12px;letter-spacing:2px;text-shadow:0 2px 8px rgba(0,0,0,.2);}
.header p{font-size:18px;opacity:.9;}

/* 英雄区 */
.hero{background:linear-gradient(180deg,#fff 0%,#f8f9fa 100%);padding:80px 20px;text-align:center;contain:layout;}
.hero h2{font-size:32px;color:#2c3e50;margin-bottom:20px;}
.hero p{font-size:16px;color:#666;max-width:700px;margin:0 auto;line-height:1.8;}

/* 功能卡片 */
.features{display:flex;justify-content:center;gap:24px;padding:50px 20px;flex-wrap:wrap;}
.feature{background:#fff;border-radius:16px;padding:36px 24px;text-align:center;width:260px;box-shadow:0 4px 20px rgba(0,0,0,.08);transition:transform .25s ease-out,box-shadow .25s ease-out;contain:layout style;}
.feature:hover{transform:translateY(-4px);box-shadow:0 8px 30px rgba(0,0,0,.12);will-change:transform;}
.feature .icon{font-size:48px;margin-bottom:16px;}
.feature h3{font-size:20px;color:#2c3e50;margin-bottom:12px;}
.feature p{font-size:14px;color:#666;line-height:1.6;}

/* 链接按钮 */
.links{display:flex;justify-content:center;gap:16px;padding:50px 20px;background:#fff;flex-wrap:wrap;}
.link-btn{display:inline-block;padding:16px 36px;border-radius:30px;font-size:16px;font-weight:500;text-decoration:none;transition:all .2s ease-out;min-width:140px;text-align:center;}
.link-btn.primary{background:#c0392b;color:#fff;box-shadow:0 4px 15px rgba(192,57,43,.3);}
.link-btn.primary:hover{background:#a93226;transform:translateY(-2px);box-shadow:0 6px 20px rgba(192,57,43,.4);will-change:transform;}
.link-btn.secondary{background:#fff;color:#c0392b;border:2px solid #c0392b;}
.link-btn.secondary:hover{background:#fef5e7;transform:translateY(-2px);}

/* 统计 */
.stats-bar{display:flex;justify-content:center;gap:50px;padding:50px 20px;background:#f8f9fa;contain:layout;}
.stat{text-align:center;}
.stat .num{font-size:48px;color:#c0392b;font-weight:bold;line-height:1;}
.stat .label{font-size:14px;color:#666;margin-top:8px;}

/* 村史 */
.history{padding:50px 20px;background:#fff;contain:layout;}
.history h2{font-size:28px;color:#2c3e50;margin-bottom:30px;text-align:center;}
.history-content{max-width:800px;margin:0 auto;}
.history-content p{font-size:16px;color:#555;line-height:1.8;margin-bottom:20px;}
.history-content .highlight{background:#fef5e7;padding:20px;border-left:4px solid #c0392b;margin:20px 0;border-radius:0 8px 8px 0;}

/* 底部 */
.footer{text-align:center;padding:36px 20px;background:#2c3e50;color:#fff;contain:layout;}
.footer p{font-size:14px;opacity:.8;}

/* 返回顶部 */
.back-top{position:fixed;bottom:30px;right:30px;width:44px;height:44px;background:rgba(192,57,43,.8);color:#fff;border:none;border-radius:50%;font-size:20px;cursor:pointer;display:none;z-index:100;box-shadow:0 4px 15px rgba(192,57,43,.3);transition:all .2s ease-out;will-change:transform;}
.back-top:hover{background:#c0392b;transform:translateY(-2px);}

/* 移动端适配 */
@media(max-width:768px){
  .header{padding:40px 16px;}
  .header h1{font-size:28px;letter-spacing:1px;}
  .header p{font-size:14px;}
  .hero{padding:40px 16px;}
  .hero h2{font-size:22px;}
  .hero p{font-size:14px;line-height:1.7;}
  .features{flex-direction:column;align-items:center;padding:30px 16px;gap:16px;}
  .feature{width:100%;max-width:360px;padding:24px 20px;}
  .feature .icon{font-size:36px;}
  .feature h3{font-size:18px;}
  .links{flex-direction:column;align-items:center;padding:30px 16px;gap:12px;}
  .link-btn{width:80%;max-width:300px;text-align:center;padding:14px 0;font-size:15px;}
  .stats-bar{flex-direction:column;gap:24px;padding:30px 16px;}
  .stat .num{font-size:36px;}
  .history{padding:30px 16px;}
  .history h2{font-size:22px;}
  .history-content p{font-size:14px;}
  .back-top{bottom:20px;right:20px;width:40px;height:40px;font-size:18px;}
}

/* 性能优化：减少重排重绘 */
.feature,.link-btn,.back-top{will-change:auto;}
.header,.hero,.history,.footer,.stats-bar{contain:layout style;}