/* ═══════════════════════════════════════════════════════════════
   HK_TOOLBOX  Enterprise Design System
   ═══════════════════════════════════════════════════════════════
   ─── 1. 设计令牌 (Design Tokens)
   ─── 2. 基础重置 (Base Reset)
   ─── 3. 排版 (Typography)
   ─── 4. 表单 (Forms)
   ─── 5. 按钮 (Buttons)
   ─── 6. 徽章 (Badges)
   ─── 7. 卡片 (Cards)
   ─── 8. 表格 (Tables)
   ─── 9. 登录 (Login)
   ─── 10. 侧边栏 (Sidebar)
   ─── 11. 顶栏 (Topbar)
   ─── 12. 页面内容 (Page)
   ─── 13. KPI 指标卡 (KPI)
   ─── 14. 趋势图 (Bar Chart)
   ─── 15. Modal 弹窗
   ─── 16. Toast 通知
   ─── 17. 空状态 / 加载
   ─── 18. 辅助工具
   ─── 19. 动画 (Animations)
   ─── 20. 响应式 (Responsive)
   ═══════════════════════════════════════════════════════════════ */

/* ═══ 1. 设计令牌 ═══ */
:root {
  /* 品牌色 — Indigo */
  --c-brand-50:  #eef2ff;
  --c-brand-100: #e0e7ff;
  --c-brand-200: #c7d2fe;
  --c-brand-300: #a5b4fc;
  --c-brand-400: #818cf8;
  --c-brand-500: #6366f1;
  --c-brand-600: #4f46e5;
  --c-brand-700: #4338ca;
  --c-brand-800: #3730a3;

  /* 辅助色 */
  --c-cyan:      #06b6d4;
  --c-cyan-bg:   rgba(6,182,212,.12);
  --c-green:     #22c55e;
  --c-green-bg:  rgba(34,197,94,.12);
  --c-red:       #ef4444;
  --c-red-bg:    rgba(239,68,68,.12);
  --c-amber:     #f59e0b;
  --c-amber-bg:  rgba(245,158,11,.12);
  --c-blue:      #3b82f6;
  --c-blue-bg:   rgba(59,130,246,.12);
  --c-violet:    #8b5cf6;
  --c-violet-bg: rgba(139,92,246,.12);

  /* 中性色 */
  --c-gray-50:  #f8fafc;
  --c-gray-100: #f1f5f9;
  --c-gray-200: #e2e8f0;
  --c-gray-300: #cbd5e1;
  --c-gray-400: #94a3b8;
  --c-gray-500: #64748b;
  --c-gray-600: #475569;
  --c-gray-700: #334155;
  --c-gray-800: #1e293b;
  --c-gray-850: #172033;
  --c-gray-900: #0f172a;
  --c-gray-950: #0b0f1e;
  --c-gray-980: #070a14;

  /* 基础 */
  --bg-body:     var(--c-gray-980);
  --bg-surface:  var(--c-gray-950);
  --bg-card:     var(--c-gray-900);
  --bg-card-alt: var(--c-gray-850);
  --bg-input:    var(--c-gray-950);
  --border:      rgba(99,102,241,.1);
  --border-light:rgba(99,102,241,.05);

  --text:       #e8e8f0;
  --text-2ary:  var(--c-gray-400);
  --text-muted: var(--c-gray-600);
  --text-dim:   var(--c-gray-700);

  /* 度量 */
  --font:    'Inter', -apple-system, system-ui, sans-serif;
  --mono:    'JetBrains Mono', 'Fira Code', monospace;
  --radius:  12px;
  --radius-s:8px;
  --radius-xs:6px;
  --sidebar-w: 240px;
  --header-h: 60px;

  /* 阴影 */
  --shadow:    0 1px 2px rgba(0,0,0,.4);
  --shadow-md: 0 4px 24px rgba(0,0,0,.4);
  --shadow-lg: 0 8px 48px rgba(0,0,0,.5);

  /* 过渡 */
  --ease: cubic-bezier(.4,0,.2,1);
  --dur: .2s;
  --trans: all var(--dur) var(--ease);
}

/* ═══ 2. 基础重置 ═══ */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{height:100%;font-size:14px;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;scroll-behavior:smooth}
body{height:100%;font-family:var(--font);background:var(--bg-body);color:var(--text);overflow:hidden;line-height:1.5}
a{color:var(--c-brand-400);text-decoration:none;transition:var(--trans)}
a:hover{color:var(--c-brand-300)}
img{max-width:100%;display:block}
svg{display:block;flex-shrink:0}
::selection{background:var(--c-brand-500);color:#fff}

/* 滚动条 */
::-webkit-scrollbar{width:4px;height:4px}
::-webkit-scrollbar-track{background:transparent}
::-webkit-scrollbar-thumb{background:var(--c-gray-700);border-radius:2px}
::-webkit-scrollbar-thumb:hover{background:var(--c-gray-500)}

/* ═══ 2a. #app 容器（JS 控制显示/隐藏）═══ */
#app{display:none;height:100%;width:100%;background:var(--bg-body);position:relative}

/* ═══ 3. 排版 ═══ */
h1,h2,h3,h4,h5,h6{font-weight:600;line-height:1.3;letter-spacing:-.02em}
h1{font-size:1.5rem;font-weight:700}
h2{font-size:1.25rem}
h3{font-size:1.1rem}
h4{font-size:1rem}
code,.mono{font-family:var(--mono);font-size:.92em}
small{font-size:.85em;color:var(--text-2ary)}

/* ═══ 4. 表单 ═══ */
.form-group{margin-bottom:18px}
.form-label{display:block;font-size:11px;font-weight:600;color:var(--text-2ary);margin-bottom:5px;text-transform:uppercase;letter-spacing:.4px}
.form-input{width:100%;padding:10px 14px;background:var(--bg-input);border:1px solid var(--border);border-radius:var(--radius-xs);color:var(--text);font-size:14px;font-family:var(--font);outline:none;transition:var(--trans)}
.form-input:focus{border-color:var(--c-brand-500);box-shadow:0 0 0 3px rgba(99,102,241,.12)}
.form-input::placeholder{color:var(--c-gray-600)}
.form-input.error{border-color:var(--c-red);box-shadow:0 0 0 3px var(--c-red-bg)}
textarea.form-input{resize:vertical;min-height:64px}
select.form-input{cursor:pointer;-webkit-appearance:none;appearance:none;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%2394a3b8' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'/%3E%3C/svg%3E");background-repeat:no-repeat;background-position:right 10px center;padding-right:32px}

/* 开关 Toggle */
.toggle{position:relative;display:inline-block;width:40px;height:24px;cursor:pointer;flex-shrink:0}
.toggle input{opacity:0;width:0;height:0}
.toggle-track{position:absolute;inset:0;background:var(--c-gray-700);border-radius:12px;transition:var(--trans)}
.toggle-track::before{content:'';position:absolute;width:18px;height:18px;left:3px;bottom:3px;border-radius:50%;background:#fff;transition:var(--trans);box-shadow:0 1px 3px rgba(0,0,0,.3)}
.toggle input:checked+.toggle-track{background:var(--c-brand-500)}
.toggle input:checked+.toggle-track::before{transform:translateX(16px)}
.toggle-label{display:flex;align-items:center;gap:10px;font-size:13px;color:var(--text-2ary);cursor:pointer}

/* 复选框 */
.checkbox{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--text-2ary);cursor:pointer}
.checkbox input[type=checkbox]{width:16px;height:16px;accent-color:var(--c-brand-500);cursor:pointer}

/* ═══ 5. 按钮 ═══ */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:6px;font-family:var(--font);cursor:pointer;transition:var(--trans);border:1px solid transparent;font-weight:500;white-space:nowrap;text-decoration:none;user-select:none;outline:none;line-height:1.4;flex-shrink:0}

.btn-primary{background:linear-gradient(135deg,var(--c-brand-500),var(--c-brand-600));color:#fff;border-color:var(--c-brand-500);padding:10px 24px;border-radius:var(--radius-xs);font-size:14px;font-weight:600}
.btn-primary:hover{box-shadow:0 8px 32px rgba(99,102,241,.3);transform:translateY(-1px)}
.btn-primary:active{transform:translateY(0)}
.btn-primary:disabled{opacity:.4;cursor:not-allowed;transform:none;box-shadow:none}

.btn-secondary{background:var(--bg-card);color:var(--text);border-color:var(--border);padding:8px 20px;border-radius:var(--radius-xs);font-size:13px}
.btn-secondary:hover{border-color:var(--c-brand-500);color:var(--c-brand-400);background:var(--bg-card-alt)}

.btn-ghost{background:transparent;color:var(--text-2ary);border-color:transparent;padding:6px 14px;border-radius:var(--radius-xs);font-size:12px}
.btn-ghost:hover{background:var(--bg-card-alt);color:var(--text)}

.btn-danger{background:var(--c-red);color:#fff;border-radius:var(--radius-xs);font-size:12px;font-weight:600;padding:6px 16px}
.btn-danger:hover{box-shadow:0 4px 20px var(--c-red-bg);transform:translateY(-1px)}

.btn-success{background:var(--c-green);color:#fff;border-radius:var(--radius-xs);font-size:12px;font-weight:600;padding:6px 16px}
.btn-success:hover{box-shadow:0 4px 20px var(--c-green-bg);transform:translateY(-1px)}

.btn-sm{padding:7px 16px;font-size:12px;border-radius:var(--radius-xs)}
.btn-xs{padding:4px 10px;font-size:11px;border-radius:4px}
.btn-block{width:100%}
.btn-icon{padding:8px;border-radius:var(--radius-xs)}

.login-btn{padding:12px;font-size:15px;font-weight:600;margin-top:4px}

/* ═══ 6. 徽章 ═══ */
.tag{display:inline-flex;align-items:center;padding:2px 10px;border-radius:5px;font-size:11px;font-weight:600;letter-spacing:.2px;line-height:1.4}
.tag-green{background:var(--c-green-bg);color:var(--c-green)}
.tag-red{background:var(--c-red-bg);color:var(--c-red)}
.tag-amber{background:var(--c-amber-bg);color:var(--c-amber)}
.tag-blue{background:var(--c-blue-bg);color:var(--c-blue)}
.tag-cyan{background:var(--c-cyan-bg);color:var(--c-cyan)}
.tag-violet{background:var(--c-violet-bg);color:var(--c-violet)}
.tag-gray{background:var(--bg-card-alt);color:var(--c-gray-500)}

/* ═══ 7. 卡片 ═══ */
.card{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);padding:24px;transition:var(--trans);animation:slideUp .35s ease-out}
.card:hover{border-color:rgba(99,102,241,.12)}
.card-header{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:16px;padding-bottom:12px;border-bottom:1px solid var(--border-light)}
.card-header h3{font-size:14px;font-weight:600;display:flex;align-items:center;gap:6px}
.card-header .actions{display:flex;gap:6px;flex-shrink:0}
.card-body{animation:fadeIn .3s ease-out}

/* ═══ 8. 表格 ═══ */
.table-wrap{overflow-x:auto;margin:-2px 0}
table{width:100%;border-collapse:separate;border-spacing:0;font-size:13px;min-width:500px}
thead th{text-align:left;padding:10px 14px;font-size:10px;font-weight:600;color:var(--c-gray-500);text-transform:uppercase;letter-spacing:.5px;border-bottom:1px solid var(--border);white-space:nowrap;user-select:none}
tbody td{padding:10px 14px;border-bottom:1px solid var(--border-light);font-size:13px;vertical-align:middle;transition:background .08s}
tbody tr{transition:background .08s}
tbody tr:hover td{background:var(--bg-card-alt)}
tbody tr:last-child td{border-bottom:none}
.cell-mono{font-family:var(--mono);font-size:12px}
.cell-2ary{color:var(--text-2ary);font-size:12px}
.cell-small{font-size:11px;color:var(--text-muted)}

/* ═══ 9. 登录页 ═══ */
#loginPage{position:fixed;inset:0;z-index:9999;display:flex;align-items:center;justify-content:center;background:var(--bg-body);overflow:hidden}
.login-grid{position:fixed;inset:0;background-image:radial-gradient(ellipse 1px 1px,rgba(99,102,241,.08)0%,transparent 0%);background-size:40px 40px;mask-image:radial-gradient(ellipse at center,black 30%,transparent 70%);-webkit-mask-image:radial-gradient(ellipse at center,black 30%,transparent 70%)}
.login-glow{position:fixed;pointer-events:none}
.login-glow--t{top:-20%;left:-10%;width:60%;height:70%;background:radial-gradient(ellipse,var(--c-brand-500),transparent 60%);opacity:.05}
.login-glow--b{bottom:-20%;right:-10%;width:60%;height:70%;background:radial-gradient(ellipse,var(--c-cyan),transparent 60%);opacity:.04}
.login-box{position:relative;z-index:1;width:400px;max-width:94vw;animation:slideUp .6s ease-out}

.login-brand{text-align:center;margin-bottom:28px}
.login-brand-icon{width:52px;height:52px;margin:0 auto 12px;border-radius:14px;background:linear-gradient(135deg,var(--c-brand-500),var(--c-brand-700));display:flex;align-items:center;justify-content:center;font-size:24px;font-weight:800;color:#fff;box-shadow:0 8px 32px rgba(99,102,241,.25)}
.login-brand-name{font-size:24px;font-weight:800;letter-spacing:-.5px;background:linear-gradient(135deg,var(--c-gray-100),var(--c-gray-400));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
.login-brand-ver{font-size:12px;color:var(--text-muted);margin-top:2px;letter-spacing:1px}

.login-card{background:var(--bg-card);border:1px solid rgba(99,102,241,.1);border-radius:16px;padding:36px 32px 32px;box-shadow:var(--shadow-lg);position:relative;overflow:hidden}
.login-card::before{content:'';position:absolute;top:0;left:24px;right:24px;height:1px;background:linear-gradient(90deg,transparent,var(--c-brand-500),transparent);opacity:.3}
.login-card-header{margin-bottom:24px}
.login-card-header h2{font-size:18px;font-weight:600;margin-bottom:4px}
.login-card-header p{font-size:13px;color:var(--text-2ary)}
.login-error{font-size:12px;color:var(--c-red);min-height:20px;text-align:center;margin-top:14px;transition:var(--trans)}
.login-footer{text-align:center;margin-top:20px;font-size:11px;color:var(--text-muted)}

/* ═══ 10. 侧边栏 ═══ */
.sidebar{position:fixed;left:0;top:0;bottom:0;width:var(--sidebar-w);z-index:100;background:var(--bg-surface);border-right:1px solid var(--border);display:flex;flex-direction:column;transition:transform .3s var(--ease)}
.sidebar-head{padding:16px 18px;border-bottom:1px solid var(--border);display:flex;align-items:center;gap:10px;flex-shrink:0}
.sidebar-close{display:none;width:30px;height:30px;border-radius:8px;background:transparent;border:none;color:var(--c-gray-500);cursor:pointer;align-items:center;justify-content:center;flex-shrink:0;transition:var(--trans);margin-left:-4px}
.sidebar-close:hover{background:var(--bg-card-alt);color:var(--text)}
.sidebar-logo{width:36px;height:36px;border-radius:10px;background:linear-gradient(135deg,var(--c-brand-500),var(--c-brand-700));display:flex;align-items:center;justify-content:center;font-size:16px;font-weight:800;color:#fff;flex-shrink:0;box-shadow:0 4px 12px rgba(99,102,241,.2)}
.sidebar-title .sidebar-name{font-size:14px;font-weight:700;letter-spacing:-.3px}
.sidebar-title .sidebar-ver{font-size:9px;color:var(--text-muted);font-weight:400;margin-top:-1px}

.sidebar-nav{flex:1;overflow-y:auto;padding:10px 8px}
.nav-group{font-size:9px;text-transform:uppercase;letter-spacing:1.2px;color:var(--c-gray-600);padding:16px 14px 5px;font-weight:600}
.nav-item{display:flex;align-items:center;gap:10px;padding:9px 14px;border-radius:var(--radius-xs);color:var(--c-gray-400);font-size:13px;font-weight:500;cursor:pointer;transition:all .12s;margin-bottom:1px;position:relative;text-decoration:none}
.nav-item:hover{background:var(--bg-card-alt);color:var(--text)}
.nav-item.active{background:rgba(99,102,241,.1);color:var(--c-brand-400);font-weight:600}
.nav-item.active::before{content:'';position:absolute;left:0;top:6px;bottom:6px;width:2px;background:var(--c-brand-500);border-radius:2px}
.nav-icon{width:18px;text-align:center;font-size:14px;flex-shrink:0;opacity:.8}
.nav-item.active .nav-icon{opacity:1}
.nav-badge{margin-left:auto;font-size:10px;padding:1px 7px;border-radius:10px;background:var(--bg-card);color:var(--c-gray-500);font-weight:500;min-width:20px;text-align:center}
.nav-item.active .nav-badge{background:rgba(99,102,241,.12);color:var(--c-brand-400)}

.sidebar-foot{padding:12px 14px;border-top:1px solid var(--border);display:flex;align-items:center;gap:8px;flex-shrink:0}
.sidebar-avatar{width:30px;height:30px;border-radius:8px;background:linear-gradient(135deg,var(--c-brand-500),var(--c-brand-700));display:flex;align-items:center;justify-content:center;font-size:12px;font-weight:700;color:#fff;flex-shrink:0}
.sidebar-user{font-size:12px;font-weight:500;flex:1;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.sidebar-logout{width:30px;height:30px;border-radius:7px;display:flex;align-items:center;justify-content:center;color:var(--c-gray-500);cursor:pointer;transition:var(--trans);border:none;background:transparent}
.sidebar-logout:hover{background:var(--c-red-bg);color:var(--c-red)}

.sidebar-overlay{display:none;position:fixed;inset:0;z-index:99;background:rgba(0,0,0,.5);backdrop-filter:blur(4px)}

/* ═══ 11. 顶栏 ═══ */
.main{margin-left:var(--sidebar-w);height:100%;display:flex;flex-direction:column;background:var(--bg-body);min-height:0}
.topbar{height:var(--header-h);padding:0 28px;display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid var(--border);background:rgba(15,23,42,.7);backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);flex-shrink:0}
.topbar-left{display:flex;align-items:center;gap:12px;min-width:0}
.topbar-menu{display:none;width:36px;height:36px;border-radius:8px;border:1px solid var(--border);background:var(--bg-card);color:var(--text);cursor:pointer;align-items:center;justify-content:center;flex-shrink:0;transition:var(--trans)}
.topbar-menu:hover{background:var(--bg-card-alt);border-color:var(--c-brand-500)}
.topbar-left h1{font-size:17px;font-weight:600;letter-spacing:-.3px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.topbar-left h1 small{font-size:12px;font-weight:400;color:var(--text-muted);margin-left:8px}
.topbar-right{display:flex;align-items:center;gap:16px;flex-shrink:0}
.topbar-status{display:flex;align-items:center;gap:6px;font-size:12px;color:var(--text-2ary);white-space:nowrap}
.topbar-divider{width:1px;height:20px;background:var(--border)}
.topbar-clock{font-size:12px;color:var(--text-muted);font-family:var(--mono);white-space:nowrap}

/* 状态灯 */
.status-dot{width:7px;height:7px;border-radius:50%;flex-shrink:0;animation:pulse-dot 2s infinite}
.status-dot.on{background:var(--c-green);box-shadow:0 0 8px var(--c-green-bg)}
.status-dot.off{background:var(--c-gray-500);box-shadow:none;animation:none}

/* ═══ 12. 页面内容 ═══ */
.page{flex:1;overflow-y:auto;padding:28px 32px 48px;min-height:0}
.page-loading{display:flex;flex-direction:column;align-items:center;justify-content:center;min-height:400px;color:var(--text-muted);gap:12px}
.page-loading p{font-size:13px}
.page-header{margin-bottom:24px;animation:slideUp .35s ease-out}
.page-header h2{font-size:22px;font-weight:700;letter-spacing:-.5px;margin-bottom:4px}
.page-header p{font-size:13px;color:var(--text-2ary)}
.spinner{display:inline-block;width:18px;height:18px;border:2px solid rgba(255,255,255,.25);border-top-color:#fff;border-radius:50%;animation:spin .6s linear infinite}
.spinner-lg{width:28px;height:28px;border:3px solid var(--border);border-top-color:var(--c-brand-500);border-radius:50%;animation:spin .6s linear infinite}

/* ═══ 13. KPI 指标卡 ═══ */
.kpi-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(200px,1fr));gap:14px;margin-bottom:24px}
.kpi{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);padding:22px 24px;position:relative;overflow:hidden;transition:var(--trans);animation:slideUp .4s ease-out both}
.kpi:hover{transform:translateY(-3px);border-color:rgba(99,102,241,.2);box-shadow:0 12px 40px rgba(0,0,0,.3)}
.kpi::after{content:'';position:absolute;top:0;left:0;right:0;height:2px}
.kpi:nth-child(1)::after{background:linear-gradient(90deg,var(--c-brand-500),var(--c-brand-400))}
.kpi:nth-child(2)::after{background:linear-gradient(90deg,var(--c-cyan),var(--c-blue))}
.kpi:nth-child(3)::after{background:linear-gradient(90deg,var(--c-green),var(--c-cyan))}
.kpi:nth-child(4)::after{background:linear-gradient(90deg,var(--c-amber),var(--c-red))}
.kpi:nth-child(5)::after{background:linear-gradient(90deg,var(--c-violet),var(--c-brand-500))}
.kpi:nth-child(6)::after{background:linear-gradient(90deg,var(--c-blue),var(--c-violet))}
.kpi-top{display:flex;align-items:center;justify-content:space-between;margin-bottom:10px}
.kpi-icon{width:38px;height:38px;border-radius:10px;display:flex;align-items:center;justify-content:center;font-size:16px;flex-shrink:0}
.kpi-icon--brand{background:rgba(99,102,241,.12)}.kpi-icon--cyan{background:var(--c-cyan-bg)}.kpi-icon--green{background:var(--c-green-bg)}.kpi-icon--amber{background:var(--c-amber-bg)}.kpi-icon--red{background:var(--c-red-bg)}
.kpi-trend{font-size:10px;padding:2px 8px;border-radius:10px;font-weight:600}
.kpi-trend--up{background:var(--c-green-bg);color:var(--c-green)}
.kpi-trend--steady{background:var(--c-blue-bg);color:var(--c-blue)}
.kpi-trend--down{background:var(--c-red-bg);color:var(--c-red)}
.kpi-val{font-size:28px;font-weight:800;letter-spacing:-1px;line-height:1.2;margin-bottom:3px}
.kpi-val--brand{color:var(--c-brand-400)}.kpi-val--cyan{color:var(--c-cyan)}.kpi-val--green{color:var(--c-green)}.kpi-val--amber{color:var(--c-amber)}.kpi-val--red{color:var(--c-red)}.kpi-val--blue{color:var(--c-blue)}
.kpi-label{font-size:11px;color:var(--text-2ary);font-weight:500;text-transform:uppercase;letter-spacing:.4px}

/* ═══ 14. 趋势图 ═══ */
.grid-2{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin-bottom:16px}
.grid-3{display:grid;grid-template-columns:1fr 1fr 1fr;gap:16px;margin-bottom:16px}
.bar-chart{display:flex;align-items:flex-end;gap:6px;height:90px;padding:16px 4px 28px}
.bar-chart .bar-item{flex:1;border-radius:4px 4px 0 0;position:relative;transition:var(--trans);cursor:pointer}
.bar-chart .bar-item::before{content:attr(data-val);position:absolute;top:-18px;left:50%;transform:translateX(-50%);font-size:10px;font-weight:600;color:var(--text-2ary);white-space:nowrap;opacity:0;transition:var(--trans)}
.bar-chart .bar-item:hover::before{opacity:1}
.bar-chart .bar-item::after{content:attr(data-label);position:absolute;bottom:-22px;left:50%;transform:translateX(-50%);font-size:9px;color:var(--c-gray-600);white-space:nowrap}

/* ═══ 15. Modal ═══ */
.modal-overlay{position:fixed;inset:0;z-index:9000;display:none;align-items:center;justify-content:center;background:rgba(0,0,0,.55);backdrop-filter:blur(6px);animation:fadeIn .15s;padding:20px}
.modal-overlay.active{display:flex}
.modal{background:var(--bg-card);border:1px solid rgba(99,102,241,.12);border-radius:16px;width:100%;max-width:480px;max-height:85vh;overflow-y:auto;animation:scaleIn .25s ease-out;box-shadow:var(--shadow-lg)}
.modal-header{display:flex;align-items:center;justify-content:space-between;padding:22px 24px 16px;border-bottom:1px solid var(--border-light);position:sticky;top:0;background:var(--bg-card);z-index:1;border-radius:16px 16px 0 0}
.modal-title{font-size:16px;font-weight:600}
.modal-close{width:30px;height:30px;border-radius:8px;display:flex;align-items:center;justify-content:center;background:transparent;border:none;color:var(--text-2ary);cursor:pointer;transition:var(--trans)}
.modal-close:hover{background:var(--bg-card-alt);color:var(--text)}
.modal-body{padding:20px 24px 24px}

/* ═══ 16. Toast ═══ */
#toastBox{position:fixed;top:16px;right:16px;z-index:99999;display:flex;flex-direction:column;gap:8px;pointer-events:none}
.toast{padding:12px 18px;border-radius:var(--radius-s);font-size:13px;font-weight:500;animation:toastIn .3s ease-out;display:flex;align-items:center;gap:8px;max-width:380px;box-shadow:var(--shadow-lg);backdrop-filter:blur(12px);pointer-events:auto}
.toast-success{background:rgba(34,197,94,.12);border:1px solid rgba(34,197,94,.2);color:var(--c-green)}
.toast-error{background:rgba(239,68,68,.12);border:1px solid rgba(239,68,68,.2);color:var(--c-red)}
.toast-info{background:rgba(99,102,241,.12);border:1px solid rgba(99,102,241,.2);color:var(--c-brand-400)}
.toast--out{animation:toastOut .25s ease-in forwards}

/* ═══ 17. 空状态 / 骨架屏 ═══ */
.empty{text-align:center;padding:48px 20px;color:var(--text-muted)}
.empty-icon{font-size:40px;margin-bottom:12px;opacity:.4}
.empty p{font-size:13px}
.empty-sub{font-size:11px;color:var(--c-gray-600);margin-top:4px}

.skel{background:linear-gradient(90deg,var(--bg-card)25%,var(--bg-card-alt)50%,var(--bg-card)75%);background-size:200%100%;animation:shimmer 1.5s infinite;border-radius:var(--radius-xs)}
.skel-h{height:14px;margin-bottom:8px}
.skel-w100{width:100%}.skel-w70{width:70%}.skel-w50{width:50%}
.skel-block{width:36px;height:36px;border-radius:10px;margin-bottom:10px}
.skel-num{width:60px;height:28px;margin-bottom:4px}

/* ═══ 18. 辅助工具 ═══ */
.flex{display:flex;align-items:center;gap:8px;flex-wrap:wrap}
.flex-between{display:flex;align-items:center;justify-content:space-between;gap:12px;flex-wrap:wrap}
.mt-4{margin-top:16px}
.mb-4{margin-bottom:16px}
.gap-2{gap:8px}
.gap-4{gap:16px}
.text-2ary{color:var(--text-2ary)}
.text-muted{color:var(--text-muted)}
.text-sm{font-size:12px}

/* 筛选条 */
.filter-bar{display:flex;gap:8px;margin-bottom:16px;flex-wrap:wrap;align-items:center}
.filter-bar .form-input{width:auto;min-width:100px;padding:7px 10px;font-size:12px}

/* 操作按钮组 */
.action-group{display:flex;gap:4px;flex-wrap:wrap}

/* 标签行 */
.label-row{display:flex;gap:20px;flex-wrap:wrap}
.label-row-item{background:var(--bg-card-alt);padding:10px 18px;border-radius:10px}
.label-row-item .num{font-size:22px;font-weight:700}
.label-row-item .lbl{font-size:10px;color:var(--text-2ary);text-transform:uppercase;letter-spacing:.4px;margin-bottom:1px}
.label-row-item .num.cyan{color:var(--c-cyan)}
.label-row-item .num.brand{color:var(--c-brand-400)}

/* ═══ 19. 动画 ═══ */
@keyframes fadeIn{from{opacity:0}to{opacity:1}}
@keyframes slideUp{from{opacity:0;transform:translateY(12px)}to{opacity:1;transform:translateY(0)}}
@keyframes slideDown{from{opacity:0;transform:translateY(-12px)}to{opacity:1;transform:translateY(0)}}
@keyframes scaleIn{from{opacity:0;transform:scale(.92)}to{opacity:1;transform:scale(1)}}
@keyframes shimmer{0%{background-position:-200%0}to{background-position:200%0}}
@keyframes pulse-dot{0%,to{opacity:1}50%{opacity:.35}}
@keyframes spin{to{transform:rotate(360deg)}}
@keyframes toastIn{from{opacity:0;transform:translateX(40px)}to{opacity:1;transform:translateX(0)}}
@keyframes toastOut{from{opacity:1;transform:translateX(0)}to{opacity:0;transform:translateX(40px)}}

/* ═══ 20. 响应式 ═══ */
@media(max-width:1024px){
  .grid-2,.grid-3{grid-template-columns:1fr}
  .kpi-grid{grid-template-columns:repeat(auto-fill,minmax(170px,1fr))}
}
@media(max-width:768px){
  :root{--sidebar-w:0px}
  .sidebar{transform:translateX(-100%);width:260px}
  .sidebar.open{transform:translateX(0)}
  .sidebar.open .sidebar-close{display:flex}
  .sidebar-overlay.open{display:block}
  .topbar-menu{display:flex}
  .main{margin-left:0}
  .topbar{padding:0 16px 0 8px}
  .topbar-left h1{font-size:14px}
  .topbar-left h1 small{display:none}
  .page{padding:16px}
  .kpi-grid{grid-template-columns:repeat(2,1fr)}
  .kpi{padding:16px}
  .kpi-val{font-size:22px}
  .modal{padding:0}
  .modal-header,.modal-body{padding-left:18px;padding-right:18px}
  .kpi-grid:has(>.kpi:nth-child(1)){animation:none}
  table{font-size:12px}
  thead th,tbody td{padding:8px 10px}
}
@media(max-width:480px){
  .kpi-grid{grid-template-columns:1fr}
  .topbar-clock{display:none}
  .topbar-divider{display:none}
  .filter-bar .form-input{min-width:80px}
  .login-card{padding:24px 18px}
}