/* 行政全盘业务 · 门户样式 v2（2026-11-10 整改版）
 * #2 focus-visible / #5 SVG 图标 / #8 字号下限 / #9 grid 展开动画 / #12 顶栏渐变衔接
 */
:root{
  --bg:#eef2f8; --card:#ffffff; --primary:#2563eb; --primary-d:#1d4ed8; --primary-soft:#eaf1ff;
  --text:#1e293b; --muted:#64748b; --line:#e2e8f0; --ok:#16a34a; --ok-soft:#e9f9ef;
  --chip:#f1f5f9; --sidebar:#0f2a52; --sidebar-soft:#15356a; --focus:#7ab4ff;
}
*{box-sizing:border-box}
html,body{height:100%}
body{margin:0;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;
     background:var(--bg);color:var(--text);display:flex;flex-direction:column;min-height:100vh}

/* #2 全局键盘焦点可见 */
:focus-visible{outline:2px solid var(--focus);outline-offset:2px;border-radius:6px}
.skip-link{position:absolute;left:-9999px;top:8px;z-index:200;background:#fff;color:var(--primary-d);
           padding:9px 14px;border-radius:8px;font-size:13px;font-weight:600;text-decoration:none;
           box-shadow:0 6px 20px rgba(0,0,0,.2)}
.skip-link:focus{left:12px}
.ico{flex-shrink:0;vertical-align:middle}
.inline-ico{vertical-align:-2px}

/* ===== 顶栏 ===== */
/* #12 左段保持与侧栏同色，再向右渐变展开，衔接更连贯 */
.topbar{height:60px;flex-shrink:0;background:linear-gradient(90deg,#0f2a52 0%,#0f2a52 18%,#173d78 55%,#1d4ed8 100%);
        color:#fff;display:flex;align-items:center;padding:0 22px;gap:14px;
        box-shadow:0 2px 10px rgba(15,42,82,.18);z-index:10}
.brand{display:flex;align-items:center;gap:12px}
.brand-link{text-decoration:none;color:inherit;cursor:pointer}
.brand .logo{width:40px;height:40px;border-radius:11px;background:rgba(255,255,255,.14);
             display:flex;align-items:center;justify-content:center;flex-shrink:0}
.brand-txt .brand-name{font-size:18px;font-weight:700;letter-spacing:.5px;line-height:1.2}
.brand-txt .brand-sub{font-size:12px;color:#bcd0f5;margin-top:2px}
.topbar-right{margin-left:auto;display:flex;align-items:center;gap:12px}
.env-badge{background:rgba(255,255,255,.14);color:#dbe7ff;font-size:12.5px;font-weight:600;
           padding:6px 12px;border-radius:999px;white-space:nowrap}
.home-btn{display:inline-flex;align-items:center;gap:6px;padding:7px 12px;border-radius:9px;
          border:1px solid rgba(255,255,255,.22);background:rgba(255,255,255,.10);color:#fff;
          font-size:12.5px;font-weight:600;cursor:pointer;font-family:inherit}
.home-btn:hover{background:rgba(255,255,255,.2)}
/* 移动端菜单按钮（默认隐藏） */
.menu-btn{display:none;align-items:center;justify-content:center;width:40px;height:40px;flex-shrink:0;
         border:none;background:rgba(255,255,255,.14);border-radius:10px;color:#fff;cursor:pointer;line-height:1}
.sidebar-overlay{display:none}

/* ===== 布局 ===== */
.layout{flex:1;display:flex;min-height:0}
.sidebar{width:264px;flex-shrink:0;background:var(--sidebar);color:#cdddf5;
         padding:14px 12px 18px;overflow-y:auto}
.content{flex:1;min-width:0;position:relative;background:var(--bg)}

/* ===== 侧栏工具条 ===== */
.nav-tools{display:flex;align-items:center;justify-content:space-between;gap:8px;
           padding:4px 10px 12px;margin-bottom:4px;border-bottom:1px solid rgba(255,255,255,.10)}
.nav-tools-label{font-size:12px;font-weight:700;letter-spacing:1px;color:#8fb3e8;text-transform:uppercase}
.nav-tool-btn{border:none;background:transparent;color:#8fb3e8;font-size:12px;cursor:pointer;
              padding:3px 5px;border-radius:6px;font-family:inherit}
.nav-tool-btn:hover{color:#fff;background:rgba(255,255,255,.10)}

/* ===== 侧栏树（WAI-ARIA tree） ===== */
#nav{font-size:13.5px}
.nav-item{user-select:none}
.nav-row{display:flex;align-items:center;gap:8px;padding:9px 10px;border-radius:9px;
         cursor:pointer;color:#cdddf5;transition:background .15s,color .15s;line-height:1.3}
.nav-row:hover{background:var(--sidebar-soft)}
.nav-row.active{background:var(--primary);color:#fff;font-weight:600}
/* #2 焦点描边（键盘专属，鼠标点击不出现） */
.nav-row:focus-visible{outline:2px solid var(--focus);outline-offset:-2px;background:var(--sidebar-soft);color:#fff}
.nav-caret{width:14px;display:flex;align-items:center;justify-content:center;flex-shrink:0;
           color:#7fa6e0;transition:transform .2s}
.nav-row.open > .nav-caret{transform:rotate(90deg)}
.nav-leaf > .nav-row > .nav-caret{opacity:.35}
.nav-leaf > .nav-row > .nav-caret svg{display:none}
.nav-leaf > .nav-row > .nav-caret::before{content:"•";font-size:15px;line-height:1}
.nav-ico{display:flex;align-items:center;justify-content:center;width:18px;flex-shrink:0;font-size:15px;color:#9fc0ee}
.nav-row.active .nav-ico{color:#fff}
.nav-label{flex:1;min-width:0;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.nav-children .nav-row{color:#aecbf0}
.nav-children .nav-row.active{color:#fff}

/* #9 grid 0fr→1fr：子树再长也不会被 600px 截断 */
.nav-children{display:grid;grid-template-rows:0fr;transition:grid-template-rows .25s ease;
              margin-left:14px;border-left:1px solid rgba(255,255,255,.12);padding-left:6px}
.nav-children.show{grid-template-rows:1fr}
.nav-children-inner{min-height:0;overflow:hidden}

/* ===== 内容区 / iframe ===== */
.frame{position:absolute;inset:0;width:100%;height:100%;border:none;background:#f5f8fc}
.welcome{position:absolute;inset:0;overflow-y:auto;padding:30px 34px 40px}
.welcome-inner{max-width:1040px;margin:0 auto}
.welcome h2{font-size:22px;margin:0 0 6px}
.welcome .lead{color:var(--muted);font-size:14px;line-height:1.7;margin:0 0 20px;max-width:760px}

/* #6 首页信息密度：统计条 */
.stats-row{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px;margin:0 0 26px}
.stat{background:var(--card);border:1px solid var(--line);border-radius:13px;padding:16px 18px;
      box-shadow:0 3px 12px rgba(30,58,138,.04)}
.stat-num{font-size:25px;font-weight:750;color:var(--primary-d);line-height:1.1}
.stat-label{font-size:12.5px;color:var(--muted);margin-top:5px}

/* #6 分区标题 */
.home-sec{margin-bottom:26px}
.home-sec h3{display:flex;align-items:center;gap:7px;font-size:14.5px;font-weight:700;
             margin:0 0 12px;color:#1e293b}
.home-sec h3 svg{color:var(--primary)}
.cards{display:grid;grid-template-columns:repeat(auto-fill,minmax(200px,1fr));gap:14px}
.recent-list{display:grid;grid-template-columns:repeat(auto-fill,minmax(190px,1fr));gap:12px}
.skill-card{position:relative;background:var(--card);border:1px solid var(--line);border-radius:14px;padding:18px;
            box-shadow:0 4px 16px rgba(30,58,138,.05);transition:.18s;cursor:pointer}
.skill-card:hover{transform:translateY(-3px);box-shadow:0 10px 26px rgba(30,58,138,.12);border-color:#cfe0ff}
.skill-card:focus-visible{outline:2px solid var(--primary);outline-offset:2px}
.skill-card .sc-ico{width:40px;height:40px;border-radius:11px;background:var(--primary-soft);color:var(--primary-d);
                    display:flex;align-items:center;justify-content:center;margin-bottom:12px}
.skill-card .sc-title{font-size:14.5px;font-weight:700;margin-bottom:5px}
.skill-card .sc-desc{font-size:12.5px;color:var(--muted);line-height:1.6;
                     white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.skill-card-sm{padding:14px}
.skill-card-sm .sc-ico{width:32px;height:32px;margin-bottom:9px;border-radius:9px}
.skill-card-sm .sc-title{font-size:13.5px}
.skill-card .sc-ext{position:absolute;top:14px;right:14px;color:#94a3b8}
.welcome .note{margin-top:4px;background:#fff;border:1px dashed #c3d0e8;border-radius:12px;
               padding:14px 16px;font-size:13px;color:#475569;line-height:1.8}

/* #4 iframe 加载骨架 */
.frame-loading{position:absolute;inset:0;z-index:5;background:#f5f8fc;display:flex;
               flex-direction:column;align-items:center;justify-content:center;gap:16px}
.frame-loading[hidden]{display:none}
.sk-card{width:min(560px,84%);background:#fff;border:1px solid var(--line);border-radius:14px;
         padding:24px;box-shadow:0 6px 22px rgba(30,58,138,.06)}
.sk{border-radius:6px;background:linear-gradient(90deg,#eef2f8 25%,#e2e8f0 37%,#eef2f8 63%);
    background-size:400% 100%;animation:shimmer 1.4s ease infinite}
@keyframes shimmer{0%{background-position:100% 0}100%{background-position:0 0}}
.sk-title{height:22px;width:38%;margin-bottom:20px}
.sk-line{height:12px;width:100%;margin-bottom:11px}
.sk-line.short{width:64%}
.sk-block{height:96px;width:100%;margin:18px 0}
.loading-txt{font-size:13px;color:var(--muted)}

/* #7 外链新标签页提示条 */
.external-tip{position:absolute;top:14px;left:50%;transform:translateX(-50%);z-index:8;
              display:flex;align-items:center;gap:8px;padding:10px 16px;border-radius:10px;
              background:#0f2a52;color:#eaf2ff;font-size:13px;white-space:nowrap;max-width:92%;
              box-shadow:0 8px 24px rgba(15,42,82,.28)}
.external-tip[hidden]{display:none}

/* ===== 响应式 ===== */
@media (min-width:769px){
  .sidebar-overlay{display:none !important}
  .menu-btn{display:none !important}
}
@media (max-width:768px){
  .menu-btn{display:flex}
  .sidebar{position:fixed;top:60px;left:0;bottom:0;width:264px;max-width:80vw;z-index:60;
           transform:translateX(-100%);transition:transform .25s ease;
           box-shadow:4px 0 24px rgba(0,0,0,.28)}
  .sidebar.open{transform:translateX(0)}
  .sidebar-overlay{display:block;position:fixed;inset:60px 0 0 0;background:rgba(0,0,0,.45);
                   z-index:55;opacity:0;visibility:hidden;transition:opacity .25s ease}
  .sidebar-overlay.show{opacity:1;visibility:visible}
  .brand-txt .brand-sub{display:none}
  .env-badge{display:none}
  .home-btn span{display:none}
  .welcome{padding:20px 16px 32px}
  .welcome h2{font-size:19px}
  .welcome .lead{font-size:13px}
  .stats-row{gap:9px}
  .stat{padding:12px 10px}
  .stat-num{font-size:20px}
  .stat-label{font-size:12px}
  .cards,.recent-list{grid-template-columns:repeat(auto-fill,minmax(150px,1fr))}
  .external-tip{font-size:12px;white-space:normal;padding:9px 12px}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.01ms !important;transition-duration:.01ms !important}
}