/* 航投能源官网 - 手机端全局修复 */
@media(max-width:768px){
  /* === 导航栏 === */
  .nav-menu{position:fixed;top:70px;left:0;width:100%;background:var(--primary-dark);flex-direction:column;padding:20px;gap:4px;transform:translateY(-120%);transition:transform .3s;box-shadow:0 4px 20px rgba(0,0,0,.3);}
  .nav-menu.open{transform:translateY(0);}
  .nav-menu a{padding:12px 20px;border-radius:0;border-bottom:1px solid rgba(255,255,255,.05);}
  .hamburger{display:flex;}
  
  /* === 侧边栏隐藏 === */
  .side-bar{display:none;}
  
  /* === 页脚 === */
  .footer-inner{grid-template-columns:1fr!important;text-align:center;}
  .footer-col h4::after{left:50%;transform:translateX(-50%);}
  .footer-brand{align-items:center;}
  .footer-qr .qr-placeholder{margin:0 auto;}
  
  /* === 核心业务板块(index.html) === */
  .biz-section{height:auto!important;min-height:100vh;padding:80px 0 40px;}
  .biz-section-inner{flex-direction:column!important;height:auto!important;padding:0 5%;}
  .biz-slogan{padding:0!important;text-align:center!important;margin-bottom:24px;}
  .biz-slogan h2{font-size:24px;}
  .biz-slogan .en{font-size:12px;}
  .biz-slogan .line{margin:8px auto 0;}
  .biz-list{max-width:100%!important;padding:0!important;width:100%;}
  .biz-item-desc{max-height:none!important;opacity:1!important;padding-top:8px!important;padding-left:50px;}
  .biz-item-tag{opacity:1!important;max-height:20px!important;}
  .biz-item:active{background:rgba(255,255,255,.05);}
  
  /* === 通用网格单列 === */
  .info-grid,.culture-grid,.comp-grid,.biz-grid,.adv-grid,.project-grid,.news-card-grid,.contact-grid,.news-list{grid-template-columns:1fr!important;}
  .news-card-slider{min-width:100%!important;}
  
  /* === 横幅 === */
  .banner{height:35vh!important;min-height:220px!important;}
  .news-banner{height:200px!important;}
  
  /* === 视频播放按钮 === */
  .video-placeholder .play-btn{width:60px;height:60px;}
  
  /* === 内容区 === */
  .hero-section{padding:50px 5%;}
  .section{padding:50px 4%;}
  
  /* === 新闻列表 === */
  .news-card{flex-direction:column!important;gap:12px;padding:20px;}
  .news-date{flex-direction:row;gap:8px;min-width:auto;text-align:left;}
  .filter-bar{flex-wrap:wrap;gap:8px;justify-content:center;}
  
  /* === 文章页 === */
  .article-hero{min-height:260px;padding:80px 5% 40px;}
  .hero-title{font-size:22px;}
  .article-body{padding:30px 20px 60px;}
  
  /* === 动效关闭 === */
  .ambient-particles,.section-glow,.banner-light{display:none;}
  .banner-bg-zoom{animation:none;}
  .card-3d{transform:none!important;}
  .stagger > *{transition-delay:0ms!important;}
}

@media(max-width:480px){
  .banner-content h1{font-size:24px;}
  .banner-content .subtitle{font-size:16px;}
}