/* AI 维修 U盘 自助页 —— 无构建、无外部依赖（CSP 'self' 友好） */
:root {
  --bg: #0f1420;
  --card: #1a2233;
  --line: #2a3550;
  --fg: #e8edf7;
  --dim: #8b98b3;
  --acc: #4f8cff;
  --ok: #34c98e;
  --warn: #ffb84f;
  --err: #ff6b6b;
}
* { box-sizing: border-box; margin: 0; }
body {
  background: var(--bg); color: var(--fg);
  font: 16px/1.6 -apple-system, "PingFang SC", "Microsoft YaHei", sans-serif;
  min-height: 100vh; display: flex; flex-direction: column;
}
header { padding: 28px 20px 12px; text-align: center; }
.logo { font-size: 1.4rem; font-weight: 700; }
.sub { color: var(--dim); font-size: .85rem; margin-top: 4px; }
main { flex: 1; width: 100%; max-width: 560px; margin: 0 auto; padding: 12px 16px 24px; }
footer { text-align: center; padding: 20px; color: var(--dim); font-size: .8rem; }
footer .fine { margin-top: 4px; opacity: .7; }
a { color: var(--acc); }

.card {
  background: var(--card); border: 1px solid var(--line);
  border-radius: 14px; padding: 20px; margin: 12px 0;
}
.card h2 { font-size: 1.05rem; margin-bottom: 10px; }
.tip { color: var(--dim); font-size: .82rem; margin: 8px 0; }
.hidden { display: none !important; }

.row { display: flex; justify-content: space-between; padding: 7px 0; border-bottom: 1px dashed var(--line); font-size: .92rem; }
.row:last-of-type { border-bottom: 0; }
.label { color: var(--dim); }
.val { font-weight: 600; }

.ring-wrap { display: flex; justify-content: center; padding: 10px 0; position: relative; }
.ring { width: 130px; height: 130px; transform: rotate(-90deg); }
.ring-bg { fill: none; stroke: var(--line); stroke-width: 10; }
.ring-fg { fill: none; stroke: var(--acc); stroke-width: 10; stroke-linecap: round;
  stroke-dasharray: 326.7; stroke-dashoffset: 0; transition: stroke-dashoffset .8s ease, stroke .4s; }
.ring-fg.low { stroke: var(--warn); }
.ring-fg.crit { stroke: var(--err); }
.ring-center { position: absolute; top: 50%; left: 50%; transform: translate(-50%, -50%); text-align: center; }
#st-pct { font-size: 1.5rem; font-weight: 700; }
.ring-cap { color: var(--dim); font-size: .72rem; }

.warn { background: rgba(255,184,79,.12); border: 1px solid rgba(255,184,79,.4);
  color: var(--warn); border-radius: 8px; padding: 8px 12px; margin: 10px 0; font-size: .85rem; }

label { display: block; margin: 12px 0 4px; font-size: .85rem; color: var(--dim); }
input {
  width: 100%; background: var(--bg); border: 1px solid var(--line); color: var(--fg);
  border-radius: 10px; padding: 12px 14px; font-size: 1rem; margin-top: 4px;
}
input:focus { outline: none; border-color: var(--acc); }

.btn {
  background: var(--acc); color: #fff; border: 0; border-radius: 10px;
  padding: 12px 18px; font-size: .95rem; font-weight: 600; cursor: pointer; margin-top: 10px;
}
.btn:active { transform: scale(.98); }
.btn:disabled { opacity: .5; cursor: default; }
.btn.ghost { background: transparent; border: 1px solid var(--line); color: var(--fg); }
.btn.wide { width: 100%; }
.btns { display: flex; gap: 10px; flex-wrap: wrap; }
.btns .btn { flex: 1; min-width: 100px; white-space: nowrap; }

.key-line {
  margin-top: 12px; padding: 10px 12px; background: var(--bg);
  border: 1px dashed var(--line); border-radius: 8px;
  font: 12px/1.4 ui-monospace, monospace; color: var(--dim); word-break: break-all;
}

pre#log {
  background: var(--bg); border-radius: 8px; padding: 10px 12px;
  font: 12px/1.7 ui-monospace, monospace; color: var(--dim);
  white-space: pre-wrap; word-break: break-all; max-height: 200px; overflow-y: auto;
}
.toast {
  position: fixed; left: 50%; bottom: 28px; transform: translateX(-50%);
  background: #26324a; color: #fff; border-radius: 999px; padding: 10px 22px;
  font-size: .85rem; box-shadow: 0 6px 24px rgba(0,0,0,.4); z-index: 9;
  animation: fadein .2s ease;
}
.toast.err { background: var(--err); }
@keyframes fadein { from { opacity: 0; transform: translate(-50%, 8px); } }

/* 首次制作向导 */
.tabs { display: flex; gap: 8px; margin: 12px 0 8px; }
.tab {
  flex: 1; background: transparent; border: 1px solid var(--line); color: var(--dim);
  border-radius: 10px; padding: 9px 0; font-size: .88rem; cursor: pointer;
}
.tab.active { border-color: var(--acc); color: var(--fg); background: rgba(79,140,255,.12); }
.steps { padding-left: 20px; }
.steps li { margin: 10px 0; font-size: .92rem; }
.steps code { background: var(--bg); padding: 1px 6px; border-radius: 5px; font-size: .85em; }
.cmd {
  background: var(--bg); border: 1px solid var(--line); color: #9fe870;
  font: 12.5px/1.6 ui-monospace, Consolas, monospace;
  padding: 10px 12px; border-radius: 8px; margin: 8px 0;
  word-break: break-all; user-select: all;
}
.copy-cmd { padding: 8px 16px; font-size: .85rem; }
details { margin-top: 12px; }
summary { cursor: pointer; color: var(--acc); font-size: .88rem; }
.dl-item { padding: 8px 0; border-bottom: 1px dashed var(--line); font-size: .85rem; }
.dl-item:last-child { border-bottom: 0; }
.dl-item .name { font-weight: 600; }
.dl-item .meta { color: var(--dim); font-size: .78rem; margin-top: 2px; word-break: break-all; }
.dl-item a { font-size: .82rem; }