/* ===== 电力交易系统未来形态 Demo · 共享样式 ===== */
:root{
  --bg-deepest:#0a0a0b;
  --bg-base:#121214;
  --bg-panel:#1a1a1d;
  --bg-elevated:#222226;
  --bg-hover:#2a2a2f;
  --bg-active:#1f1f23;
  --border:#2c2c31;
  --border-strong:#3a3a40;
  --text-primary:#e8e8ec;
  --text-secondary:#9a9aa2;
  --text-muted:#5f5f66;
  --accent:#4a9eff;
  --accent-soft:#4a9eff22;
  --accent-green:#3ecf8e;
  --accent-amber:#e0a458;
  --accent-red:#ff6b6b;
  --accent-violet:#a78bfa;
}
*{margin:0;padding:0;box-sizing:border-box;}
html,body{height:100%;}
body{
  font-family:"PingFang SC","Microsoft YaHei",-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;
  background:var(--bg-base);color:var(--text-primary);
  font-size:14px;line-height:1.5;overflow:hidden;
}
.app{display:flex;height:100vh;width:100%;}

/* ===== 侧边栏 ===== */
.sidebar{width:232px;flex-shrink:0;background:var(--bg-deepest);border-right:1px solid var(--border);display:flex;flex-direction:column;}
.brand{padding:18px 18px 14px;border-bottom:1px solid var(--border);display:flex;align-items:center;gap:10px;}
.brand-logo{width:30px;height:30px;border-radius:7px;background:linear-gradient(135deg,#3a3a40,#1a1a1d);border:1px solid var(--border-strong);display:flex;align-items:center;justify-content:center;font-size:15px;color:var(--accent);}
.brand-text{display:flex;flex-direction:column;line-height:1.25;}
.brand-title{font-size:14px;font-weight:600;letter-spacing:.5px;}
.brand-sub{font-size:11px;color:var(--text-muted);}
.nav{flex:1;overflow-y:auto;padding:8px 0;}
.nav::-webkit-scrollbar{width:6px;}
.nav::-webkit-scrollbar-thumb{background:#2a2a2f;border-radius:3px;}
.nav::-webkit-scrollbar-track{background:transparent;}
.nav-item{margin:2px 8px;}
.nav-group-title{font-size:13.5px;color:var(--text-primary);font-weight:600;letter-spacing:.5px;padding:14px 12px 6px;}
.nav-link{display:flex;align-items:center;gap:10px;padding:9px 12px;border-radius:8px;color:var(--text-secondary);cursor:pointer;font-size:13.5px;transition:background .15s,color .15s;user-select:none;}
.nav-link:hover{background:var(--bg-hover);color:var(--text-primary);}
.nav-link.active{background:var(--bg-active);color:var(--text-primary);box-shadow:inset 2px 0 0 var(--accent);}
.nav-link .ic{width:16px;height:16px;flex-shrink:0;color:var(--text-muted);}
.nav-link.active .ic{color:var(--accent);}
.nav-sub{margin:2px 0 6px;}
.nav-sub .nav-link{padding-left:38px;font-size:13px;}
/* 独立一级菜单：可点击，静止时视觉同 .nav-group-title（粗体/主色/无图标/同字号），hover/active 给底色反馈 */
.nav-link.nav-top{font-weight:600;color:var(--text-primary);letter-spacing:.5px;padding:14px 12px 6px;}
.nav-link.nav-top .ic{display:none;}
.nav-link.nav-top:hover{background:var(--bg-hover);}
.nav-link.nav-top.active{background:var(--bg-active);box-shadow:inset 2px 0 0 var(--accent);}
.sidebar-footer{padding:10px 14px;border-top:1px solid var(--border);font-size:11px;color:var(--text-muted);display:flex;align-items:center;justify-content:space-between;}
.status-dot{width:7px;height:7px;border-radius:50%;background:var(--accent-green);display:inline-block;margin-right:6px;box-shadow:0 0 6px var(--accent-green);}

/* ===== 主区域 ===== */
.main{flex:1;display:flex;flex-direction:column;overflow:hidden;}
.topbar{height:54px;flex-shrink:0;background:var(--bg-deepest);border-bottom:1px solid var(--border);display:flex;align-items:center;justify-content:space-between;padding:0 22px;}
.crumbs{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--text-secondary);}
.crumbs .sep{color:var(--text-muted);}
.crumbs .cur{color:var(--text-primary);font-weight:500;}
.topbar-right{display:flex;align-items:center;gap:16px;color:var(--text-secondary);font-size:12px;}
.pill{padding:5px 11px;border-radius:14px;background:var(--bg-elevated);border:1px solid var(--border);font-size:11.5px;color:var(--text-secondary);}
.pill .dot{display:inline-block;width:6px;height:6px;border-radius:50%;background:var(--accent-green);margin-right:6px;}
.content{flex:1;overflow-y:auto;padding:26px 32px;background:var(--bg-base);}
.content::-webkit-scrollbar{width:8px;}
.content::-webkit-scrollbar-thumb{background:#2a2a2f;border-radius:4px;}

/* ===== 页面通用组件 ===== */
.page-head{margin-bottom:22px;}
.page-title{font-size:22px;font-weight:600;letter-spacing:.5px;}
.page-desc{font-size:13px;color:var(--text-secondary);margin-top:6px;}

.cards{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;margin-bottom:24px;}
.card{background:var(--bg-panel);border:1px solid var(--border);border-radius:12px;padding:18px 20px;}
.card-label{font-size:12px;color:var(--text-secondary);}
.card-value{font-size:26px;font-weight:600;margin-top:8px;letter-spacing:.5px;}
.card-value .unit{font-size:13px;color:var(--text-secondary);margin-left:4px;}
.card-delta{font-size:12px;margin-top:6px;}
.up{color:var(--accent-green);}
.down{color:var(--accent-red);}

.panel{background:var(--bg-panel);border:1px solid var(--border);border-radius:12px;padding:18px 20px;margin-bottom:18px;}
.panel-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:14px;}
.panel-title{font-size:14px;font-weight:600;}
.panel-sub{font-size:11px;color:var(--text-muted);}
.panel-tools{display:flex;gap:8px;}
.btn{padding:5px 12px;border-radius:8px;border:1px solid var(--border-strong);background:var(--bg-elevated);color:var(--text-secondary);font-size:12px;cursor:pointer;}
.btn:hover{color:var(--text-primary);border-color:var(--accent);}
.btn.primary{background:var(--accent);color:#0a0a0b;border-color:var(--accent);font-weight:600;}

.chart-placeholder{height:240px;border-radius:8px;position:relative;overflow:hidden;background:linear-gradient(to right,var(--border) 1px,transparent 1px) 0 0/40px 40px,linear-gradient(to bottom,var(--border) 1px,transparent 1px) 0 0/40px 40px,var(--bg-elevated);}
.chart-placeholder::after{content:"图表区域 (Chart Area)";position:absolute;inset:0;display:flex;align-items:center;justify-content:center;color:var(--text-muted);font-size:12px;letter-spacing:2px;}
.spark{position:absolute;left:0;right:0;bottom:0;height:60%;background:linear-gradient(to top,var(--accent-soft),transparent);clip-path:polygon(0 80%,12% 60%,24% 70%,36% 40%,48% 55%,60% 30%,72% 45%,84% 20%,100% 35%,100% 100%,0 100%);}

.empty{height:300px;display:flex;flex-direction:column;align-items:center;justify-content:center;color:var(--text-muted);gap:10px;border:1px dashed var(--border-strong);border-radius:12px;}
.empty .big{font-size:13px;letter-spacing:1px;}

/* 表格 */
.table-wrap{overflow-x:auto;border-radius:8px;border:1px solid var(--border);}
table.tbl{width:100%;border-collapse:collapse;font-size:13px;}
table.tbl th{background:var(--bg-elevated);color:var(--text-secondary);font-weight:600;text-align:left;padding:10px 14px;border-bottom:1px solid var(--border);white-space:nowrap;}
table.tbl td{padding:10px 14px;border-bottom:1px solid var(--border);color:var(--text-primary);}
table.tbl tr:last-child td{border-bottom:none;}
table.tbl tr:hover td{background:var(--bg-hover);}

/* 标签/徽章 */
.tag{display:inline-flex;align-items:center;gap:5px;padding:2px 9px;border-radius:10px;font-size:11px;border:1px solid var(--border-strong);background:var(--bg-elevated);color:var(--text-secondary);}
.tag.green{color:var(--accent-green);border-color:#2a4a3a;background:#16241d;}
.tag.amber{color:var(--accent-amber);border-color:#4a3a2a;background:#241f16;}
.tag.red{color:var(--accent-red);border-color:#4a2a2a;background:#241616;}
.tag.blue{color:var(--accent);border-color:#2a3a4a;background:#162024;}
.tag.violet{color:var(--accent-violet);border-color:#3a2a4a;background:#1d1624;}

/* 进度条 */
.progress{height:8px;border-radius:4px;background:var(--bg-elevated);overflow:hidden;}
.progress-bar{height:100%;border-radius:4px;background:var(--accent);}
.progress-bar.green{background:var(--accent-green);}
.progress-bar.amber{background:var(--accent-amber);}
.progress-bar.red{background:var(--accent-red);}
.progress-bar.violet{background:var(--accent-violet);}

/* 两栏布局 */
.grid-2{display:grid;grid-template-columns:1fr 1fr;gap:18px;}
.grid-2 .panel{margin-bottom:0;}

/* 键值列表 */
.kv{display:flex;flex-direction:column;gap:14px;}
.kv-row{display:flex;align-items:center;justify-content:space-between;gap:12px;}
.kv-label{font-size:13px;color:var(--text-secondary);min-width:120px;}
.kv-val{font-size:13px;color:var(--text-primary);font-weight:600;}
.kv-row .progress{flex:1;}

.legend{display:flex;gap:16px;flex-wrap:wrap;font-size:12px;color:var(--text-secondary);}
.legend .dot{width:9px;height:9px;border-radius:2px;display:inline-block;margin-right:6px;vertical-align:middle;}

.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;}
.grid-3 .panel{margin-bottom:0;}

@media(max-width:1200px){
  .cards{grid-template-columns:repeat(2,1fr);}
  .grid-2,.grid-3{grid-template-columns:1fr;}
}