:root {
  color-scheme: dark;
  --bg: #071427;
  --bg2: #0b1c3a;
  --panel: #0f2748;
  --panel2: #123a63;
  --line: #254a7d;
  --line-soft: rgba(37, 74, 125, .55);
  --text: #e8f1ff;
  --dim: #9fb6d8;
  --accent: #4aa3ff;
  --teal: #3ddc97;
  --warn: #ffcc66;
  --err: #ff7b7b;
  --radius: 14px;
  --shadow: 0 18px 50px rgba(0, 0, 0, .28);
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  min-height: 100vh;
  background:
    radial-gradient(900px 500px at 85% -10%, rgba(74, 163, 255, .16), transparent 60%),
    radial-gradient(700px 420px at -5% 15%, rgba(61, 220, 151, .10), transparent 55%),
    linear-gradient(180deg, #061224, #0b1c3a 55%, #08182f);
  color: var(--text);
  font: 14px/1.65 "Microsoft YaHei", "PingFang SC", system-ui, -apple-system, sans-serif;
}
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
h1, h2, h3, h4 { margin: 0; letter-spacing: .2px; }
p { margin: 0 0 10px; }
code, .mono { font-family: ui-monospace, Consolas, "Courier New", monospace; }

/* ---------- 公共顶栏 ---------- */
.topbar {
  position: sticky; top: 0; z-index: 30;
  display: flex; align-items: center; gap: 14px;
  padding: 14px 28px;
  background: rgba(7, 20, 39, .86);
  border-bottom: 1px solid var(--line-soft);
  backdrop-filter: blur(14px);
}
.brand { display: flex; align-items: center; gap: 10px; font-weight: 700; font-size: 17px; white-space: nowrap; }
.brand .logo {
  width: 32px; height: 32px; display: grid; place-items: center;
  border-radius: 10px;
  background: linear-gradient(145deg, rgba(74, 163, 255, .28), rgba(61, 220, 151, .22));
  border: 1px solid rgba(74, 163, 255, .35);
  font-size: 18px;
}
.topbar .spacer { flex: 1; }
.nav { display: flex; gap: 6px; flex-wrap: wrap; }
.nav a {
  color: var(--dim); padding: 5px 12px; border-radius: 999px;
  border: 1px solid transparent; font-size: 13px;
}
.nav a:hover { color: var(--text); border-color: var(--line); text-decoration: none; }
.nav a.active { color: var(--text); border-color: rgba(74, 163, 255, .55); background: rgba(74, 163, 255, .12); }
.version { color: var(--dim); font-size: 12px; }

/* ---------- 布局 ---------- */
.container { max-width: 1180px; margin: 0 auto; padding: 26px 24px 60px; }
.grid { display: grid; gap: 16px; }
.grid-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.card {
  background: linear-gradient(180deg, rgba(18, 42, 79, .95), rgba(12, 31, 59, .96));
  border: 1px solid var(--line-soft);
  border-radius: var(--radius);
  padding: 18px 20px;
  box-shadow: var(--shadow);
}
.card h2 { font-size: 16px; margin-bottom: 12px; display: flex; align-items: center; gap: 8px; }
.card h3 { font-size: 14px; margin: 0 0 8px; }
.muted { color: var(--dim); }
.small { font-size: 12px; }
.hint { color: var(--dim); font-size: 12px; line-height: 1.7; margin-top: 8px; }
.hero { padding: 46px 0 18px; }
.hero h1 { font-size: clamp(26px, 4vw, 38px); line-height: 1.25; }
.hero h1 .accent { color: var(--accent); }
.hero p { color: var(--dim); font-size: 15px; max-width: 760px; margin-top: 10px; }
.hero-badges { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 16px; }

/* ---------- 标签 / 状态 ---------- */
.badge {
  display: inline-flex; align-items: center; gap: 5px;
  padding: 2px 9px; border-radius: 999px; font-size: 11px;
  border: 1px solid var(--line); color: var(--dim); white-space: nowrap;
}
.badge.ok { color: var(--teal); border-color: rgba(61, 220, 151, .45); background: rgba(61, 220, 151, .08); }
.badge.warn { color: var(--warn); border-color: rgba(255, 204, 102, .45); background: rgba(255, 204, 102, .08); }
.badge.err { color: var(--err); border-color: rgba(255, 123, 123, .45); background: rgba(255, 123, 123, .08); }
.badge.blue { color: var(--accent); border-color: rgba(74, 163, 255, .45); background: rgba(74, 163, 255, .08); }

/* ---------- 按钮 / 表单 ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 10px 18px; border-radius: 10px; cursor: pointer;
  border: 1px solid var(--line);
  background: linear-gradient(180deg, #1d477c, #163860);
  color: var(--text); font: inherit; font-weight: 600;
  transition: border-color .15s, transform .08s, opacity .15s;
}
.btn:hover { border-color: var(--accent); text-decoration: none; }
.btn:active { transform: translateY(1px); }
.btn[disabled] { opacity: .45; cursor: not-allowed; }
.btn-primary { background: linear-gradient(180deg, #2f7fd8, #1f5ea6); border-color: #4aa3ff; }
.btn-teal { background: linear-gradient(180deg, #1f9d72, #147253); border-color: #3ddc97; }
.btn-danger { background: linear-gradient(180deg, #7d2330, #5d1a25); border-color: #a33; }
.btn-ghost { background: transparent; }
.btn-sm { padding: 5px 10px; font-size: 12px; border-radius: 8px; font-weight: 500; }
.btn-block { width: 100%; }
.btn-lg { padding: 13px 22px; font-size: 15px; }

label.field { display: flex; flex-direction: column; gap: 5px; font-size: 12px; color: var(--dim); }
input, select, textarea {
  width: 100%; font: inherit; color: var(--text);
  background: rgba(7, 20, 39, .55); border: 1px solid var(--line);
  border-radius: 9px; padding: 9px 11px; outline: none;
}
input:focus, select:focus, textarea:focus { border-color: var(--accent); box-shadow: 0 0 0 3px rgba(74, 163, 255, .12); }
textarea { min-height: 80px; resize: vertical; }
input[type=checkbox] { width: auto; accent-color: var(--accent); }
.form-row { display: grid; gap: 12px; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); margin-bottom: 12px; }
.form-actions { display: flex; gap: 9px; align-items: center; flex-wrap: wrap; margin-top: 16px; }
.check { display: inline-flex; align-items: center; gap: 7px; color: var(--dim); font-size: 12px; }

/* ---------- 提示 ---------- */
.alert { border-radius: 10px; padding: 10px 13px; font-size: 13px; margin: 12px 0; border: 1px solid var(--line); }
.alert.ok { color: var(--teal); border-color: rgba(61, 220, 151, .4); background: rgba(61, 220, 151, .08); }
.alert.err { color: var(--err); border-color: rgba(255, 123, 123, .4); background: rgba(255, 123, 123, .08); }
.alert.warn { color: var(--warn); border-color: rgba(255, 204, 102, .4); background: rgba(255, 204, 102, .08); }

/* ---------- 步骤条 ---------- */
.steps { display: flex; gap: 8px; flex-wrap: wrap; margin: 18px 0 4px; }
.step {
  flex: 1; min-width: 140px; display: flex; align-items: center; gap: 9px;
  padding: 10px 12px; border-radius: 10px; border: 1px solid var(--line-soft);
  background: rgba(7, 20, 39, .35); color: var(--dim); font-size: 12px;
}
.step .n {
  width: 22px; height: 22px; border-radius: 50%; display: grid; place-items: center;
  background: rgba(74, 163, 255, .12); border: 1px solid var(--line); font-size: 11px; color: var(--text);
}
.step.done { border-color: rgba(61, 220, 151, .35); color: var(--text); }
.step.done .n { background: rgba(61, 220, 151, .18); border-color: rgba(61, 220, 151, .5); color: var(--teal); }
.step.active { border-color: rgba(74, 163, 255, .5); color: var(--text); }
.step.active .n { background: rgba(74, 163, 255, .22); border-color: var(--accent); }

/* ---------- 烧录页 ---------- */
.flash-grid { display: grid; grid-template-columns: minmax(0, .95fr) minmax(0, 1.25fr); gap: 16px; align-items: start; }
.device-box {
  display: flex; align-items: center; gap: 14px; padding: 14px;
  border: 1px dashed var(--line); border-radius: 12px; background: rgba(7, 20, 39, .35);
}
.device-box .icon { font-size: 28px; }
.device-box .name { font-weight: 700; font-size: 15px; }
.source-tabs { display: flex; gap: 6px; margin-bottom: 12px; }
.source-tabs button {
  flex: 1; padding: 8px 10px; border-radius: 9px; border: 1px solid var(--line);
  background: transparent; color: var(--dim); cursor: pointer; font: inherit; font-size: 12px;
}
.source-tabs button.active { color: var(--text); border-color: var(--accent); background: rgba(74, 163, 255, .12); }
.file-drop {
  border: 1px dashed var(--line); border-radius: 12px; padding: 20px;
  text-align: center; color: var(--dim); font-size: 12px; background: rgba(7, 20, 39, .25);
}
.file-drop strong { color: var(--text); display: block; margin-bottom: 4px; font-size: 13px; }
.fw-info { margin-top: 10px; font-size: 12px; color: var(--dim); min-height: 20px; }
.progress-wrap { margin-top: 14px; }
.progress {
  height: 10px; border-radius: 999px; background: rgba(7, 20, 39, .8);
  border: 1px solid var(--line); overflow: hidden;
}
.progress span { display: block; height: 100%; width: 0%; background: linear-gradient(90deg, #2f7fd8, #3ddc97); transition: width .12s; }
.progress-text { display: flex; justify-content: space-between; margin-top: 6px; color: var(--dim); font-size: 12px; }
.terminal {
  margin-top: 14px; height: 150px; overflow: auto; padding: 10px 12px;
  border-radius: 10px; border: 1px solid var(--line-soft); background: #050e1d;
  font: 12px/1.65 ui-monospace, Consolas, monospace; color: #9fd0ff; white-space: pre-wrap; word-break: break-word;
}
.terminal .ok { color: var(--teal); }
.terminal .err { color: var(--err); }
.terminal .dim { color: var(--dim); }

/* ---------- 管理后台 ---------- */
.admin-shell { display: flex; min-height: 100vh; }
.sidebar {
  width: 228px; flex: 0 0 228px; padding: 18px 14px;
  background: rgba(7, 20, 39, .92); border-right: 1px solid var(--line-soft);
  position: sticky; top: 0; height: 100vh; overflow: auto;
}
.sidebar .brand { margin: 4px 6px 22px; }
.sidebar .nav { flex-direction: column; gap: 4px; }
.sidebar .nav a { padding: 8px 12px; border-radius: 9px; font-size: 13px; }
.sidebar .nav a.active { background: rgba(74, 163, 255, .14); border-color: rgba(74, 163, 255, .35); }
.sidebar .bottom { margin-top: 26px; padding-top: 14px; border-top: 1px solid var(--line-soft); }
.admin-main { flex: 1; min-width: 0; padding: 22px 26px 50px; }
.admin-head { display: flex; align-items: center; gap: 12px; flex-wrap: wrap; margin-bottom: 18px; }
.admin-head h1 { font-size: 20px; }
.admin-head .spacer { flex: 1; }
.stat-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); gap: 12px; margin-bottom: 16px; }
.stat { padding: 14px 16px; }
.stat .label { color: var(--dim); font-size: 12px; }
.stat .value { font-size: 24px; font-weight: 700; margin-top: 2px; }
.stat .value.teal { color: var(--teal); }
.stat .value.blue { color: var(--accent); }

.table-wrap { overflow-x: auto; border: 1px solid var(--line-soft); border-radius: 12px; }
table { width: 100%; border-collapse: collapse; font-size: 13px; }
th, td { text-align: left; padding: 10px 12px; border-bottom: 1px solid var(--line-soft); vertical-align: middle; }
th { color: var(--dim); font-weight: 500; font-size: 12px; background: rgba(7, 20, 39, .35); white-space: nowrap; }
tr:last-child td { border-bottom: 0; }
tr:hover td { background: rgba(74, 163, 255, .045); }
.table-actions { display: flex; gap: 6px; flex-wrap: wrap; }
.empty { text-align: center; color: var(--dim); padding: 34px 10px; font-size: 13px; }
.filters { display: flex; gap: 8px; flex-wrap: wrap; margin-bottom: 12px; }
.filters input, .filters select { width: auto; min-width: 130px; }

/* ---------- 登录 ---------- */
.auth-wrap { min-height: 100vh; display: grid; place-items: center; padding: 22px; }
.auth-card { width: min(420px, 100%); }
.auth-card .brand { justify-content: center; margin-bottom: 16px; }
.auth-card h1 { font-size: 20px; text-align: center; margin-bottom: 4px; }
.auth-card .sub { text-align: center; color: var(--dim); font-size: 12px; margin-bottom: 18px; }

/* ---------- 分页 ---------- */
.pager { display: flex; gap: 6px; margin-top: 14px; flex-wrap: wrap; }
.pager a, .pager span {
  padding: 4px 10px; border-radius: 8px; border: 1px solid var(--line); color: var(--dim); font-size: 12px;
}
.pager a:hover { color: var(--text); border-color: var(--accent); text-decoration: none; }
.pager .current { color: var(--text); border-color: var(--accent); background: rgba(74, 163, 255, .12); }

/* ---------- 响应式 ---------- */
@media (max-width: 980px) {
  .flash-grid { grid-template-columns: 1fr; }
  .grid-3 { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 760px) {
  .topbar { padding: 11px 14px; gap: 8px; }
  .topbar .version { display: none; }
  .nav a { padding: 4px 8px; font-size: 12px; }
  .container { padding: 18px 12px 44px; }
  .hero { padding: 26px 0 10px; }
  .grid-2, .grid-3 { grid-template-columns: 1fr; }
  .card { padding: 14px; }
  .flash-grid { gap: 12px; }
  .admin-shell { display: block; }
  .sidebar { width: auto; height: auto; position: static; border-right: 0; border-bottom: 1px solid var(--line-soft); }
  .sidebar .nav { flex-direction: row; flex-wrap: wrap; }
  .admin-main { padding: 16px 12px 40px; }
  .steps .step { min-width: 100%; }
}