/* ============================================================
   header.css —— 公共头部样式（9 个页面共用）
   内容：顶部导航栏 / 桌面下拉菜单 / 移动端导航条 / 响应式
   ============================================================ */

/* ---------- 顶部导航栏 ---------- */
.Yshiyunyuanlin-header{position:sticky;top:0;z-index:200;background:rgba(15,23,42,.97);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);border-bottom:1px solid rgba(255,255,255,.05)}
.Yshiyunyuanlin-hdr{display:flex;align-items:center;height:58px}
.Yshiyunyuanlin-logo{display:flex;align-items:center;gap:10px;flex-shrink:0}
.Yshiyunyuanlin-logo-ico{width:30px;height:30px;background:linear-gradient(135deg,#2563eb,#1e3a8a);border-radius:8px;display:flex;align-items:center;justify-content:center}
.Yshiyunyuanlin-logo-ico svg{width:16px;height:16px;fill:#fff}
.Yshiyunyuanlin-logo-txt{font-family:'Orbitron',monospace;font-weight:900;font-size:16px;color:#fff}
.Yshiyunyuanlin-logo-txt small{display:block;font-weight:500;font-size:7px;color:#64748b;letter-spacing:2.5px;text-transform:uppercase;margin-top:-1px}
.Yshiyunyuanlin-hdr-r{margin-left:auto;display:flex;align-items:center;gap:16px;flex-shrink:0}
.Yshiyunyuanlin-hdr-date{color:#506078;font-size:12px;font-family:'Orbitron',monospace;letter-spacing:1.5px}
.Yshiyunyuanlin-hdr-dot{width:8px;height:8px;background:#16a34a;border-radius:50%;animation:breathe 2s ease-in-out infinite}

/* ---------- 桌面导航 ---------- */
.Yshiyunyuanlin-nav-bar{display:flex;align-items:center;justify-content:center;gap:2px;flex:1}
.Yshiyunyuanlin-nav-item{position:relative}
/* 悬停桥梁：连接导航项与下拉菜单，避免移出间隙时菜单消失（无下拉的栏目自动无此层） */
.Yshiyunyuanlin-nav-item:has(.Yshiyunyuanlin-nav-drop)::after{content:'';position:absolute;left:0;right:0;top:100%;height:20px;pointer-events:auto;z-index:1}
.Yshiyunyuanlin-nav-link{display:block;padding:9px 22px;color:#7a8ba8;font-size:15px;font-weight:500;border-radius:8px;transition:.25s;white-space:nowrap;position:relative}
.Yshiyunyuanlin-nav-link::after{content:'';position:absolute;bottom:0;left:50%;width:0;height:2.5px;background:linear-gradient(90deg,#3b82f6,#60a5fa);transition:.35s;transform:translateX(-50%);border-radius:2px}
.Yshiyunyuanlin-nav-link:hover{color:#e2e8f0;background:rgba(255,255,255,.04)}
.Yshiyunyuanlin-nav-link:hover::after{width:50%}
.Yshiyunyuanlin-nav-item.Yshiyunyuanlin-active .Yshiyunyuanlin-nav-link{color:#fff;font-weight:600;background:rgba(37,99,235,.12)}
.Yshiyunyuanlin-nav-item.Yshiyunyuanlin-active .Yshiyunyuanlin-nav-link::after{width:60%;animation:glow 2s ease-in-out infinite}

/* ---------- 桌面下拉菜单 ---------- */
.Yshiyunyuanlin-nav-drop{position:absolute;top:calc(100% + 8px);left:50%;transform:translateX(-50%) translateY(8px);opacity:0;pointer-events:none;transition:.25s cubic-bezier(.4,0,.2,1);min-width:150px;background:rgba(15,23,42,.98);border:1px solid rgba(255,255,255,.08);border-radius:10px;padding:6px;backdrop-filter:blur(20px);box-shadow:0 12px 36px rgba(0,0,0,.4);z-index:10}
.Yshiyunyuanlin-nav-item:hover .Yshiyunyuanlin-nav-drop{opacity:1;pointer-events:auto;transform:translateX(-50%) translateY(0)}
.Yshiyunyuanlin-nav-drop::before{content:'';position:absolute;top:-5px;left:50%;transform:translateX(-50%) rotate(45deg);width:10px;height:10px;background:rgba(15,23,42,.98);border-top:1px solid rgba(255,255,255,.08);border-left:1px solid rgba(255,255,255,.08)}
.Yshiyunyuanlin-drop-a{display:block;padding:10px 14px;color:#94a3b8;font-size:14px;font-weight:500;border-radius:6px;transition:.2s;white-space:nowrap}
.Yshiyunyuanlin-drop-a:hover{color:#e2e8f0;background:rgba(37,99,235,.1)}

/* ---------- 移动端导航条 ---------- */
.Yshiyunyuanlin-mnav-wrap{display:none;background:rgba(15,23,42,.97);border-bottom:1px solid rgba(255,255,255,.06);position:sticky;top:50px;z-index:199;overflow:visible}
.Yshiyunyuanlin-mnav-bar{display:flex;overflow-x:auto;-webkit-overflow-scrolling:touch;scrollbar-width:none}
.Yshiyunyuanlin-mnav-bar::-webkit-scrollbar{display:none}
.Yshiyunyuanlin-mnav-bar::after{content:'';flex-shrink:0;width:2px}
.Yshiyunyuanlin-mnav-link{flex:0 0 auto;padding:10px 14px;font-size:13px;font-weight:500;color:#7a8ba8;white-space:nowrap;border-bottom:2px solid transparent;transition:.25s;-webkit-tap-highlight-color:transparent;display:flex;align-items:center;gap:4px;cursor:pointer;user-select:none}
.Yshiyunyuanlin-mnav-link.Yshiyunyuanlin-mnav-on{color:#fff;border-bottom-color:#3b82f6}
.Yshiyunyuanlin-mnav-link .Yshiyunyuanlin-mnav-arrow{font-style:normal;font-size:11px;display:inline-block;opacity:.4;font-weight:800;transition:transform .3s,opacity .3s}
.Yshiyunyuanlin-mnav-link.Yshiyunyuanlin-open .Yshiyunyuanlin-mnav-arrow{transform:rotate(180deg);opacity:1;font-size:13px}
.Yshiyunyuanlin-mnav-link.Yshiyunyuanlin-open{color:#fff;border-bottom-color:#3b82f6;background:rgba(37,99,235,.12)}
.Yshiyunyuanlin-mnav-dd{position:absolute;left:0;right:0;top:100%;display:none;background:rgba(8,15,30,.98);border-bottom:1px solid rgba(255,255,255,.06);z-index:10;box-shadow:0 8px 24px rgba(0,0,0,.5)}
.Yshiyunyuanlin-mnav-dd.Yshiyunyuanlin-show{display:flex}
.Yshiyunyuanlin-mnav-dd a{flex:1;text-align:center;padding:12px 0;font-size:13px;font-weight:500;color:#7a8ba8;transition:.2s;-webkit-tap-highlight-color:transparent}
.Yshiyunyuanlin-mnav-dd a+a{border-left:1px solid rgba(255,255,255,.06)}
.Yshiyunyuanlin-mnav-dd a:hover{color:#e2e8f0;background:rgba(255,255,255,.04)}
.Yshiyunyuanlin-mnav-dd a:active{color:#fff;background:rgba(37,99,235,.15)}

/* ---------- 响应式（移动端收起桌面导航，展开移动导航条） ---------- */
@media(max-width:640px){
  .Yshiyunyuanlin-hdr{height:50px}
  .Yshiyunyuanlin-hdr-r{display:none}
  .Yshiyunyuanlin-nav-bar{display:none}
  .Yshiyunyuanlin-mnav-wrap{display:block}
}