/* ==========================================================================
   site.css — 全站布局（header / 导航 / 语言切换 / 页脚 / 响应式）
   依赖 theme.css 的变量与配色体系（最后引入，覆盖旧主题）。
   引用：<link rel="stylesheet" href="static/css/theme.css"> + 本文件
   ========================================================================== */

/* —— 容器 —— */
.container{max-width:1200px;margin:0 auto;padding:0 20px}
.site-header{position:sticky;top:0;z-index:1000;background:rgba(255,255,255,.95);
  backdrop-filter:blur(10px);box-shadow:0 2px 14px rgba(188,67,11,.08)}
.site-header__inner{display:flex;align-items:center;justify-content:space-between;height:72px}

/* —— Logo（文字徽标，避免依赖缺失图片）—— */
.logo{display:flex;align-items:center;gap:10px;text-decoration:none;flex:0 0 auto}
.logo-img{height:42px;width:auto;display:block;border:none}

/* —— 主导航 —— */
.site-nav{flex:1;display:flex;justify-content:center}
.site-nav>ul{display:flex;align-items:center;gap:4px;list-style:none;margin:0;padding:0}
.site-nav>ul>li{position:relative}
.site-nav>ul>li>a{display:block;padding:10px 14px;color:var(--ink);font-weight:500;font-size:15px;
  border-radius:8px;transition:color .2s,background .2s;text-decoration:none;white-space:nowrap}
.site-nav>ul>li>a:hover,.site-nav>ul>li>a.active{color:var(--orange);background:var(--orange-tint)}
/* 二级下拉 */
.site-nav .sub{position:absolute;top:100%;left:50%;transform:translateX(-50%);
  min-width:230px;background:#fff;border-top:2px solid var(--orange);border-radius:0 0 12px 12px;
  box-shadow:0 14px 30px rgba(31,36,44,.14);padding:8px;opacity:0;visibility:hidden;transition:.2s;z-index:50}
.site-nav>ul>li:hover .sub{opacity:1;visibility:visible}
.site-nav .sub a{display:block;padding:9px 14px;border-radius:8px;color:var(--ink);font-size:14px;text-decoration:none}
.site-nav .sub a:hover{background:var(--orange-tint);color:var(--orange-dark)}

/* —— 右侧操作区 —— */
.site-actions{display:flex;align-items:center;gap:14px;flex:0 0 auto}
/* 语言切换：地球图标 + 当前语言，点击展开下拉菜单 */
.lang-switch{position:relative;display:inline-flex;flex:0 0 auto}
.lang-trigger{display:flex;align-items:center;gap:6px;border:none;background:var(--line-soft);
  cursor:pointer;padding:6px 13px;border-radius:999px;font-size:13px;font-weight:600;color:var(--ink);
  transition:.2s;font-family:inherit}
.lang-trigger:hover{background:var(--orange);color:#fff}
.lang-trigger i.fa-globe{font-size:15px}
.lang-trigger i.fa-caret-down{font-size:11px;opacity:.7;transition:transform .2s}
.lang-switch.open .lang-trigger i.fa-caret-down{transform:rotate(180deg)}
/* 默认隐藏：提高选择器优先级并加 visibility/opacity 双保险，杜绝任何意外常驻显示 */
.site-actions .lang-switch .lang-menu{position:absolute;top:calc(100% + 8px);right:0;min-width:132px;list-style:none;margin:0;padding:6px;
  background:#fff;border-radius:12px;box-shadow:0 10px 34px rgba(31,36,44,.18);z-index:1200;
  display:none;visibility:hidden;opacity:0;pointer-events:none}
.site-actions .lang-switch.open .lang-menu{display:block;visibility:visible;opacity:1;pointer-events:auto;animation:langFade .16s ease}
@keyframes langFade{from{opacity:0;transform:translateY(-4px)}to{opacity:1;transform:translateY(0)}}
.lang-menu li{margin:0}
.lang-menu button{display:flex;width:100%;align-items:center;text-align:left;border:none;background:transparent;
  cursor:pointer;padding:9px 12px;border-radius:8px;font-size:14px;color:var(--ink);font-family:inherit;transition:.15s;white-space:nowrap}
.lang-menu button:hover{background:var(--line-soft);color:var(--orange-dark)}
.lang-menu button.active{background:var(--orange);color:#fff}
.nav-toggle{display:none;border:none;background:transparent;cursor:pointer;font-size:22px;color:var(--ink);padding:4px 8px}

/* —— 移动端导航 —— */
.mobile-nav{display:none;position:fixed;inset:72px 0 0;background:#fff;overflow-y:auto;z-index:999;padding:14px 18px}
.mobile-nav.open{display:block}
.mobile-nav .m-group{border-bottom:1px solid var(--line);padding:8px 0}
.mobile-nav .m-group>a{display:flex;justify-content:space-between;align-items:center;font-weight:700;color:var(--ink);
  padding:10px 4px;text-decoration:none;font-size:15px}
.mobile-nav .m-sub{padding:4px 0 8px 12px}
.mobile-nav .m-sub a{display:block;padding:7px 4px;color:var(--muted);text-decoration:none;font-size:14px}
.mobile-nav .m-sub a:hover{color:var(--orange-dark)}
.mobile-nav .m-lang{display:flex;gap:8px;margin-top:14px}
.mobile-nav .m-lang button{flex:1;border:1px solid var(--line);background:#fff;border-radius:10px;padding:10px;
  font-weight:600;color:var(--muted);cursor:pointer}
.mobile-nav .m-lang button.active{background:var(--orange);color:#fff;border-color:var(--orange)}

/* —— 页脚 —— */
.site-footer{background:var(--ink)!important;color:var(--footer-muted);padding:54px 0 0}
.site-footer .f-grid{display:grid;grid-template-columns:1.4fr 2fr;gap:40px}
.site-footer .f-about .public-title h3{color:#fff;font-size:20px}
.site-footer .f-about .public-title p{color:var(--orange-light);letter-spacing:1px;text-transform:uppercase;font-size:12px}
.site-footer .f-about p{color:var(--footer-muted);font-size:14px;line-height:1.9;margin-top:10px}
.site-footer .f-cols{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.site-footer .f-col h4{color:#fff;font-size:15px;margin:0 0 12px}
.site-footer .f-col ul{list-style:none;margin:0;padding:0}
.site-footer .f-col li{margin:7px 0}
.site-footer .f-col a{color:var(--footer-muted);text-decoration:none;font-size:13.5px}
.site-footer .f-col a:hover{color:var(--orange-light)}
.site-footer .f-contact{margin-top:6px}
.site-footer .f-contact p{margin:4px 0;font-size:13.5px;color:var(--footer-muted)}
.site-footer .copyriht{background:var(--ink-deep)!important;color:var(--footer-note);font-size:12.5px;
  padding:18px 0;margin-top:40px;text-align:center}
.site-footer .copyriht a{color:var(--on-dark-accent)}

/* —— 首页 Hero（静态，替代原 ldcms 轮播）—— */
.home-hero{position:relative;padding:118px 0 94px;color:#fff;overflow:hidden;
  background:url(static/img/hctg/hero-home.jpg) center/cover no-repeat}
.home-hero::before{content:"";position:absolute;inset:0;
  background:linear-gradient(135deg,rgba(31,36,44,.80),rgba(188,67,11,.52))}
.home-hero .container{position:relative;z-index:1;text-align:center}
.home-hero .en{display:block;font-size:14px;letter-spacing:3px;text-transform:uppercase;color:#fff;opacity:.85;margin-bottom:14px}
.home-hero h1{color:#fff;font-size:40px;font-weight:800;margin:0 0 16px;text-shadow:0 2px 12px rgba(0,0,0,.3)}
.home-hero p{max-width:760px;margin:0 auto 26px;font-size:17px;line-height:1.9;color:rgba(255,255,255,.92)}
.home-hero .hero-tags{display:flex;flex-wrap:wrap;gap:10px;justify-content:center}
.home-hero .hero-tags span{border:1px solid rgba(255,255,255,.5);background:rgba(255,255,255,.12);
  color:#fff;padding:6px 16px;border-radius:999px;font-size:13px}
.home-hero .btn-primary{background:#fff;color:var(--orange-dark);border-color:#fff}
.home-hero .btn-primary:hover{background:var(--orange-tint);color:var(--orange-dark)}
.home-hero .btn-jing-outline{border-color:#fff;color:#fff}
.home-hero .btn-jing-outline:hover{background:#fff;color:var(--orange-dark)}

/* —— 返回顶部 —— */
#backTop{position:fixed;right:22px;bottom:22px;display:flex;flex-direction:column;gap:10px;z-index:900}
#backTop a,#backTop span{width:44px;height:44px;border-radius:12px;background:var(--orange);color:#fff;
  display:flex;align-items:center;justify-content:center;font-size:18px;box-shadow:var(--shadow-hover);text-decoration:none}
#backTop a:hover{background:var(--orange-dark)}

/* —— 响应式 —— */
@media(max-width:1080px){
  .site-nav{display:none}
  .nav-toggle{display:block}
  /* 手机端顶栏保留语言切换（紧凑显示） */
  .site-footer .f-grid{grid-template-columns:1fr;gap:26px}
}
@media(max-width:640px){
  .site-header__inner{height:60px}
  .logo-img{height:32px}
  .mobile-nav{inset:60px 0 0}
  /* 手机顶栏语言切换紧凑化 + 让出空间，避免横向 logo 与切换/汉堡在小屏挤压 */
  .container{padding:0 14px}
  .site-actions{gap:8px}
  .lang-trigger{padding:5px 10px;font-size:12px;gap:5px}
  .lang-trigger i.fa-globe{font-size:14px}
  .lang-menu{min-width:116px;top:calc(100% + 6px)}
  .lang-menu button{padding:8px 10px;font-size:13px}
  .site-footer .f-cols{grid-template-columns:repeat(2,1fr)}
}