/* ============================================================
   设计基座：色彩 / 字体 / 间距 / 通用组件
   视觉语言：电网调度控制台 —— 深墨蓝 + 电光蓝 + 薄荷绿
   ============================================================ */
:root{
  --brand:#1B5CFF;
  --brand-600:#1249D6;
  --brand-700:#0E3AAE;
  --brand-50:#EEF3FF;
  --brand-100:#DCE7FF;

  --mint:#00B589;
  --mint-600:#009B75;
  --mint-50:#E7F8F3;
  --amber:#F79009;
  --amber-50:#FEF5E7;
  --danger:#E5484D;
  --danger-50:#FDEDED;
  --violet:#7C5CFF;
  --violet-50:#F1EEFF;

  --ink-900:#08131F;
  --ink-800:#0B1B2D;
  --ink-700:#10253C;

  --bg:#F3F6FB;
  --surface:#FFFFFF;
  --surface-2:#F8FAFD;
  --surface-3:#EEF3F9;

  --text:#0F1D2E;
  --text-2:#5A6B80;
  --text-3:#8A99AB;

  --line:#E4EAF3;
  --line-2:#D3DCE9;

  --r-xs:6px;
  --r-sm:9px;
  --r:12px;
  --r-lg:16px;
  --r-xl:22px;

  --sh-1:0 1px 2px rgba(15,29,46,.05);
  --sh-2:0 2px 6px rgba(15,29,46,.05), 0 14px 30px -22px rgba(15,29,46,.35);
  --sh-3:0 28px 70px -28px rgba(8,19,31,.42);
  --sh-brand:0 8px 22px -12px rgba(27,92,255,.85);

  --font:-apple-system,BlinkMacSystemFont,"Segoe UI","HarmonyOS Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  --mono:"SF Mono",ui-monospace,"JetBrains Mono",Menlo,Consolas,monospace;

  --sidebar-w:252px;
  --topbar-h:62px;
}

*,*::before,*::after{margin:0;padding:0;box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  font-family:var(--font);
  background:var(--bg);
  color:var(--text);
  font-size:14px;
  line-height:1.55;
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
}
img,svg{display:block}
a{color:var(--brand);text-decoration:none}
button,input,select,textarea{font-family:inherit;font-size:inherit;color:inherit}
::selection{background:rgba(27,92,255,.18)}

/* 滚动条 */
*::-webkit-scrollbar{width:10px;height:10px}
*::-webkit-scrollbar-thumb{background:#C8D3E2;border-radius:20px;border:3px solid transparent;background-clip:content-box}
*::-webkit-scrollbar-thumb:hover{background:#A9B8CC;background-clip:content-box;border:3px solid transparent}
*::-webkit-scrollbar-track{background:transparent}

/* ---------- 排版 ---------- */
h1,h2,h3,h4{font-weight:700;letter-spacing:-.015em;line-height:1.3}
.h1{font-size:34px;letter-spacing:-.03em}
.h2{font-size:21px}
.h3{font-size:16px}
.muted{color:var(--text-2)}
.dim{color:var(--text-3)}
.mono{font-family:var(--mono);font-variant-numeric:tabular-nums}
.tnum{font-variant-numeric:tabular-nums;font-feature-settings:"tnum"}
.nowrap{white-space:nowrap}
.small{font-size:12.5px}
.tiny{font-size:11.5px}
.strong{font-weight:700}
.center{text-align:center}
.hidden{display:none !important}

/* ---------- 图标 ---------- */
.ico{width:18px;height:18px;flex:none;stroke:currentColor;fill:none;stroke-width:1.9;stroke-linecap:round;stroke-linejoin:round}
.ico.sm{width:15px;height:15px}
.ico.lg{width:22px;height:22px}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:7px;
  height:38px;padding:0 16px;border-radius:10px;border:1px solid transparent;
  font-size:13.5px;font-weight:600;letter-spacing:.01em;cursor:pointer;
  background:none;white-space:nowrap;transition:background .16s,border-color .16s,color .16s,transform .16s,box-shadow .16s;
  -webkit-tap-highlight-color:transparent;
}
.btn:disabled{opacity:.45;cursor:not-allowed;transform:none !important;box-shadow:none !important}
.btn.primary{
  background:linear-gradient(180deg,#2E6BFF,var(--brand));
  color:#fff;box-shadow:var(--sh-brand),inset 0 1px 0 rgba(255,255,255,.24);
}
.btn.primary:hover:not(:disabled){background:linear-gradient(180deg,#3B75FF,var(--brand-600));transform:translateY(-1px)}
.btn.primary:active:not(:disabled){transform:translateY(0)}
.btn.ghost{background:var(--surface);border-color:var(--line-2);color:var(--text);box-shadow:var(--sh-1)}
.btn.ghost:hover:not(:disabled){border-color:#B9C6D9;background:var(--surface-2)}
.btn.soft{background:var(--brand-50);color:var(--brand-600)}
.btn.soft:hover:not(:disabled){background:var(--brand-100)}
.btn.danger{background:var(--surface);border-color:#F3C5C7;color:var(--danger)}
.btn.danger:hover:not(:disabled){background:var(--danger-50);border-color:#EBA9AC}
.btn.dark{background:var(--ink-800);color:#fff}
.btn.dark:hover:not(:disabled){background:var(--ink-700)}
.btn.link{height:auto;padding:0;color:var(--brand);font-weight:600}
.btn.sm{height:31px;padding:0 11px;font-size:12.5px;border-radius:8px;gap:5px}
.btn.lg{height:46px;padding:0 24px;font-size:15px;border-radius:12px}
.btn.icon{width:38px;padding:0}
.btn.icon.sm{width:31px}
.btn.block{width:100%}

/* ---------- 卡片 ---------- */
.card{
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--r-lg);
  box-shadow:var(--sh-1);
}
.card.pad{padding:22px}
.card-h{display:flex;align-items:center;justify-content:space-between;gap:14px;padding:18px 22px;border-bottom:1px solid var(--line)}
.card-h h3{font-size:15px}
.card-b{padding:20px 22px}
.card-b.flush{padding:0}

/* ---------- 徽标 / 标签 ---------- */
.badge{
  display:inline-flex;align-items:center;gap:6px;height:23px;padding:0 9px;
  border-radius:99px;font-size:11.5px;font-weight:600;letter-spacing:.01em;
  background:var(--surface-3);color:var(--text-2);white-space:nowrap;
}
.badge .dot{width:6px;height:6px;border-radius:50%;background:currentColor;flex:none}
.badge.ok{background:var(--mint-50);color:#00795C}
.badge.blue{background:var(--brand-50);color:var(--brand-600)}
.badge.warn{background:var(--amber-50);color:#A45B00}
.badge.bad{background:var(--danger-50);color:#B42318}
.badge.gray{background:var(--surface-3);color:var(--text-2)}
.badge.violet{background:var(--violet-50);color:#5B3FD6}

.chip{
  display:inline-flex;align-items:center;gap:6px;height:29px;padding:0 12px;
  border-radius:99px;border:1px solid var(--line-2);background:var(--surface);
  font-size:12.5px;color:var(--text-2);cursor:pointer;transition:.15s;white-space:nowrap;
}
.chip:hover{border-color:#B9C6D9;color:var(--text)}
.chip.active{background:var(--brand);border-color:var(--brand);color:#fff;font-weight:600;box-shadow:0 6px 16px -10px rgba(27,92,255,.9)}
.chip.plain{cursor:default}

.tag{display:inline-flex;align-items:center;height:21px;padding:0 7px;border-radius:5px;background:var(--surface-3);color:var(--text-2);font-size:11px;font-weight:500}

/* ---------- 分段控件 ---------- */
.seg{display:inline-flex;padding:3px;gap:2px;background:var(--surface-3);border-radius:10px}
.seg button{border:0;background:none;height:28px;padding:0 13px;border-radius:8px;font-size:12.5px;font-weight:600;color:var(--text-2);cursor:pointer;transition:.15s}
.seg button:hover{color:var(--text)}
.seg button.active{background:var(--surface);color:var(--brand-600);box-shadow:var(--sh-1)}
.seg.on-dark{background:rgba(255,255,255,.08)}
.seg.on-dark button{color:rgba(255,255,255,.66)}
.seg.on-dark button.active{background:rgba(255,255,255,.94);color:var(--ink-800)}

/* ---------- 表单 ---------- */
.field{display:flex;flex-direction:column;gap:6px}
.field > label,.flabel{font-size:12.5px;font-weight:600;color:var(--text-2)}
.field .req{color:var(--danger)}
.input,.select,.textarea{
  width:100%;height:38px;padding:0 12px;border:1px solid var(--line-2);border-radius:9px;
  background:var(--surface);font-size:13.5px;color:var(--text);outline:none;transition:.15s;
}
.textarea{height:auto;padding:10px 12px;resize:vertical;line-height:1.6;font-family:var(--mono);font-size:12.5px}
.input:hover,.select:hover,.textarea:hover{border-color:#B9C6D9}
.input:focus,.select:focus,.textarea:focus{border-color:var(--brand);box-shadow:0 0 0 3px rgba(27,92,255,.13)}
.input::placeholder,.textarea::placeholder{color:#A7B4C4}
.select{appearance:none;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='14' height='14' viewBox='0 0 24 24' fill='none' stroke='%235A6B80' stroke-width='2.4' stroke-linecap='round'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E");background-repeat:no-repeat;background-position:right 11px center;padding-right:32px}
.search{position:relative;display:flex;align-items:center}
.search .ico{position:absolute;left:11px;color:var(--text-3);pointer-events:none}
.search .input{padding-left:35px}
.check{display:inline-flex;align-items:center;gap:7px;cursor:pointer;font-size:13px;color:var(--text)}
.check input{width:15px;height:15px;accent-color:var(--brand);cursor:pointer}
.form-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}
.form-grid .span2{grid-column:span 2}
.switch{position:relative;width:38px;height:22px;border-radius:99px;background:var(--line-2);cursor:pointer;transition:.2s;flex:none;border:0}
.switch::after{content:"";position:absolute;top:2px;left:2px;width:18px;height:18px;border-radius:50%;background:#fff;box-shadow:0 1px 3px rgba(0,0,0,.2);transition:.2s}
.switch.on{background:var(--brand)}
.switch.on::after{transform:translateX(16px)}

/* ---------- 表格 ---------- */
.table{width:100%;border-collapse:separate;border-spacing:0;font-size:13px}
.table th{
  position:sticky;top:0;z-index:1;text-align:left;font-size:11.5px;font-weight:700;letter-spacing:.04em;
  text-transform:uppercase;color:var(--text-3);background:var(--surface-2);
  padding:11px 14px;border-bottom:1px solid var(--line);white-space:nowrap;
}
.table td{padding:13px 14px;border-bottom:1px solid var(--line);vertical-align:middle}
.table tbody tr{transition:background .12s}
.table tbody tr:hover{background:var(--surface-2)}
.table tbody tr:last-child td{border-bottom:0}
.table .num{text-align:right;font-variant-numeric:tabular-nums;font-family:var(--mono);font-size:12.5px}
.table .actions{display:flex;gap:6px;justify-content:flex-end}
.table-wrap{overflow:auto;max-height:calc(100vh - 320px);border-radius:0 0 var(--r-lg) var(--r-lg)}
.table-wrap.short{max-height:420px}

/* ---------- 空状态 ---------- */
.empty{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:12px;padding:56px 24px;text-align:center;color:var(--text-2)}
.empty .ico{width:34px;height:34px;color:#C3CFDE;stroke-width:1.5}
.empty p{font-size:13.5px;max-width:380px;line-height:1.7}
.empty b{color:var(--text);font-size:14.5px}

/* ---------- 弹窗 ---------- */
.ov{
  position:fixed;inset:0;z-index:200;display:flex;align-items:center;justify-content:center;
  padding:24px;background:rgba(8,19,31,.52);backdrop-filter:blur(3px);
  animation:fadeIn .16s ease;
}
.modal{
  width:100%;max-width:640px;max-height:calc(100vh - 64px);display:flex;flex-direction:column;
  background:var(--surface);border-radius:var(--r-xl);box-shadow:var(--sh-3);
  animation:popIn .2s cubic-bezier(.2,.8,.3,1);
}
.modal.wide{max-width:860px}
.modal.narrow{max-width:460px}
.modal-h{display:flex;align-items:flex-start;justify-content:space-between;gap:16px;padding:22px 24px 16px}
.modal-h h3{font-size:17px}
.modal-h p{font-size:12.5px;color:var(--text-2);margin-top:3px}
.modal-x{border:0;background:var(--surface-3);width:30px;height:30px;border-radius:9px;color:var(--text-2);cursor:pointer;display:grid;place-items:center;transition:.15s;flex:none}
.modal-x:hover{background:var(--line);color:var(--text)}
.modal-b{padding:0 24px;overflow:auto;display:flex;flex-direction:column;gap:14px}
.modal-f{display:flex;align-items:center;justify-content:flex-end;gap:10px;padding:18px 24px 22px}
.modal-f .left{margin-right:auto;font-size:12.5px;color:var(--text-2)}
@keyframes fadeIn{from{opacity:0}to{opacity:1}}
@keyframes popIn{from{opacity:0;transform:translateY(10px) scale(.985)}to{opacity:1;transform:none}}

/* ---------- Toast ---------- */
.toast-wrap{position:fixed;top:18px;left:50%;transform:translateX(-50%);z-index:400;display:flex;flex-direction:column;gap:8px;pointer-events:none}
.toast{
  display:flex;align-items:center;gap:9px;padding:10px 16px;border-radius:11px;
  background:var(--ink-800);color:#fff;font-size:13px;font-weight:500;
  box-shadow:0 18px 40px -18px rgba(8,19,31,.7);animation:toastIn .22s cubic-bezier(.2,.8,.3,1);
}
.toast .ico{color:#5FE3B8}
.toast.bad .ico{color:#FF8A8D}
.toast.warn .ico{color:#FFC46B}
@keyframes toastIn{from{opacity:0;transform:translateY(-12px)}to{opacity:1;transform:none}}

/* ---------- 顶栏通用件（学员端 / 后台共用） ---------- */
.crumb{display:flex;align-items:center;gap:7px;font-size:12px;color:var(--text-3)}
.crumb b{color:var(--text);font-weight:600}
.crumb .ico{width:13px;height:13px;color:#B9C6D9}
.env{
  display:inline-flex;align-items:center;gap:6px;font-size:11.5px;font-weight:600;
  color:var(--text-2);background:var(--surface-2);border:1px solid var(--line);
  padding:5px 10px;border-radius:99px;white-space:nowrap;
}
.env .dot{width:6px;height:6px;border-radius:50%;background:#C8D3E2;flex:none}
.env.online .dot{background:var(--mint);box-shadow:0 0 0 3px rgba(0,181,137,.15)}
.env.online{color:#00795C;background:var(--mint-50);border-color:#BDEEE0}
.env.local{color:#A45B00;background:var(--amber-50);border-color:#F7DDBA}
.burger{display:none;width:36px;height:36px;border-radius:9px;border:1px solid var(--line);background:#fff;align-items:center;justify-content:center;cursor:pointer;color:var(--text-2);flex:none}
.scrim{display:none;position:fixed;inset:0;background:rgba(8,19,31,.5);z-index:55;backdrop-filter:blur(2px)}
@media (max-width:980px){ body.nav-open .scrim{display:block} .burger{display:flex} }

/* ---------- 页面标题 / 工具栏（两端共用） ---------- */
.page-head{display:flex;align-items:flex-end;justify-content:space-between;gap:18px;flex-wrap:wrap;margin-bottom:22px}
.page-head .eyebrow{font-size:11px;font-weight:700;letter-spacing:.12em;text-transform:uppercase;color:var(--brand);margin-bottom:6px}
.page-head h2{font-size:23px;letter-spacing:-.025em}
.page-head p{font-size:13px;color:var(--text-2);margin-top:5px;max-width:660px;line-height:1.65}
.head-tools{display:flex;align-items:center;gap:10px;flex-wrap:wrap}
.eyebrow{font-size:11px;font-weight:700;letter-spacing:.12em;text-transform:uppercase;color:var(--brand);margin-bottom:6px}
.toolbar{
  display:flex;align-items:center;gap:12px;flex-wrap:wrap;
  padding:14px 16px;background:var(--surface);border:1px solid var(--line);
  border-radius:var(--r);margin-bottom:16px;box-shadow:var(--sh-1);
}
.toolbar .sep{width:1px;height:22px;background:var(--line);margin:0 2px}
.toolbar .hint{margin-left:auto;font-size:12px;color:var(--text-3);display:flex;align-items:center;gap:6px}

/* ---------- 侧边栏通用件 ---------- */
.side-mark{
  width:38px;height:38px;border-radius:11px;flex:none;display:grid;place-items:center;
  background:linear-gradient(145deg,#3A78FF,#1249D6);
  box-shadow:0 8px 20px -10px rgba(58,120,255,.95), inset 0 1px 0 rgba(255,255,255,.3);
}
.side-mark svg{width:20px;height:20px;stroke:#fff;fill:none;stroke-width:2;stroke-linejoin:round}
.side-label{font-size:10px;font-weight:700;letter-spacing:.14em;color:rgba(255,255,255,.28);padding:16px 10px 7px;text-transform:uppercase}
.nav-item{
  display:flex;align-items:center;gap:10px;height:40px;padding:0 11px;border-radius:9px;
  color:rgba(255,255,255,.62);font-size:13.5px;font-weight:500;cursor:pointer;
  border:0;background:none;width:100%;text-align:left;transition:.15s;position:relative;
}
.nav-item .ico{color:rgba(255,255,255,.42);transition:.15s}
.nav-item:hover{background:rgba(255,255,255,.055);color:#fff}
.nav-item:hover .ico{color:rgba(255,255,255,.75)}
.nav-item.active{background:rgba(255,255,255,.1);color:#fff;font-weight:600}
.nav-item.active .ico{color:#7FA8FF}
.nav-item.active::before{
  content:"";position:absolute;left:-12px;top:50%;transform:translateY(-50%);
  width:3px;height:20px;border-radius:0 3px 3px 0;background:#4C86FF;
  box-shadow:0 0 12px rgba(76,134,255,.9);
}

/* ---------- 分隔 / 工具 ---------- */
.hr{height:1px;background:var(--line);border:0}
.row{display:flex;align-items:center;gap:10px}
.row.wrap{flex-wrap:wrap}
.row.between{justify-content:space-between}
.spacer{flex:1}
.stack{display:flex;flex-direction:column;gap:14px}
.stack.sm{gap:8px}
.grow{flex:1;min-width:0}
.truncate{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.scroll-x{overflow-x:auto}

@media (max-width:720px){
  .form-grid{grid-template-columns:1fr}
  .form-grid .span2{grid-column:span 1}
  .h1{font-size:26px}
}

/* ---------- 加载态 ---------- */
.spin{
  display:inline-block;width:14px;height:14px;flex:none;
  border:2px solid currentColor;border-right-color:transparent;border-radius:50%;
  animation:spin .7s linear infinite;vertical-align:-2px;
}
@keyframes spin{to{transform:rotate(360deg)}}
.btn .spin{margin-right:6px}