:root {
  --bg: #0f1115; --panel: #171a21; --panel-2: #1e222b; --border: #2a2f3a;
  --text: #e6e9ef; --muted: #9aa3b2; --accent: #4f8cff; --accent-2: #36d399;
  --warn: #f5a623; --danger: #ff5c5c; --chip: #232838;
}
* { box-sizing: border-box; }
body {
  margin: 0; background: var(--bg); color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  line-height: 1.55; padding: 32px 16px 64px;
}
.wrap { max-width: 880px; margin: 0 auto; position: relative; }
h1 { font-size: 22px; margin: 0 0 4px; letter-spacing: .3px; }
.sub { color: var(--muted); font-size: 13px; margin-bottom: 24px; }
.sub b { color: var(--accent-2); font-weight: 600; }

/* 语言切换 */
.langswitch { position: absolute; top: 4px; right: 0; font-size: 13px; }

.back {
  display: inline-flex; align-items: center; gap: 6px; margin-bottom: 16px;
  padding: 5px 13px; border: 1px solid var(--border); border-radius: 999px;
  background: var(--chip); color: var(--muted);
  font-family: ui-monospace, "Cascadia Code", Consolas, monospace;
  font-size: 12.5px; font-weight: 600; text-decoration: none;
  transition: color .15s, border-color .15s, transform .12s;
}
.back:hover { color: var(--accent); border-color: var(--accent); transform: translateX(-2px); }
.langswitch a { position: relative; color: var(--accent); text-decoration: none; padding: 4px 10px; border: 1px solid var(--border); border-radius: 7px; }
.langswitch a:hover { border-color: var(--accent); }
/* 悬浮提示 */
.langswitch a::after {
  content: attr(data-tip);
  position: absolute;
  top: calc(100% + 8px);
  right: 0;
  white-space: nowrap;
  background: var(--panel-2);
  color: var(--text);
  border: 1px solid var(--border);
  padding: 4px 9px;
  border-radius: 6px;
  font-size: 12px;
  line-height: 1.4;
  opacity: 0;
  transform: translateY(-4px);
  pointer-events: none;
  transition: opacity .15s ease, transform .15s ease;
  box-shadow: 0 6px 18px rgba(0, 0, 0, .18);
  z-index: 50;
}
.langswitch a:hover::after { opacity: 1; transform: translateY(0); }

.fmtmini { position: absolute; top: 14px; right: 16px; display: flex; align-items: center; gap: 14px; font-size: 12px; color: var(--muted); }
.fmtmini .flbl { font-weight: 600; color: var(--text); }
.chk { display: inline-flex; align-items: center; gap: 6px; cursor: pointer; user-select: none; color: var(--text); font-size: 12.5px; }
.chk input { position: absolute; opacity: 0; width: 0; height: 0; }
.chk .box { width: 15px; height: 15px; border: 1px solid var(--border); border-radius: 4px; background: var(--panel-2); display: inline-block; position: relative; transition: .12s; }
.chk input:checked + .box { background: var(--accent); border-color: var(--accent); }
.chk input:checked + .box::after { content: ""; position: absolute; left: 5px; top: 2px; width: 4px; height: 8px; border: solid #fff; border-width: 0 2px 2px 0; transform: rotate(45deg); }
.chk input:focus-visible + .box { outline: 2px solid var(--accent); outline-offset: 2px; }

.drop {
  display: block;
  border: 1.5px dashed var(--border); border-radius: 14px; background: var(--panel);
  padding: 40px 20px; text-align: center; cursor: pointer; transition: .15s;
}
.drop:hover, .drop.over { border-color: var(--accent); background: var(--panel-2); }
.drop .big { font-size: 15px; margin-bottom: 6px; }
.drop .small { color: var(--muted); font-size: 12.5px; }
input[type=file] { display: none; }

.status { margin: 18px 0; font-size: 13.5px; color: var(--muted); min-height: 20px; }
.err { color: var(--danger); }

.card {
  position: relative;
  background: var(--panel); border: 1px solid var(--border); border-radius: 12px;
  padding: 18px 20px; margin-bottom: 16px;
}
.filehead { display: flex; flex-wrap: wrap; align-items: baseline; gap: 10px; padding-right: 190px; }
.filehead .name { font-weight: 600; font-size: 15px; word-break: break-all; }
.filehead .size { color: var(--muted); font-size: 12.5px; }

.appmeta { margin: 10px 0 4px; font-size: 13px; }
.appmeta .row { display: flex; gap: 10px; padding: 3px 0; align-items: baseline; }
.appmeta .mk { color: var(--muted); width: 108px; flex: none; white-space: nowrap; }
.appmeta .mv { word-break: break-all; font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; font-size: 12.5px; }
.appmeta .mv code { background: var(--panel-2); padding: 1px 6px; border-radius: 5px; }

.badges { display: flex; gap: 8px; flex-wrap: wrap; margin: 12px 0 4px; }
.badge {
  font-size: 12px; padding: 3px 10px; border-radius: 999px; background: var(--chip);
  border: 1px solid var(--border); color: var(--muted);
}
.badge.on { background: rgba(54,211,153,.12); border-color: var(--accent-2); color: var(--accent-2); }

.signer { border-top: 1px solid var(--border); padding-top: 14px; margin-top: 14px; }
.signer:first-of-type { border-top: none; padding-top: 0; margin-top: 0; }
.signer h3 { font-size: 14px; margin: 0 0 10px; display: flex; align-items: center; gap: 8px; }
.src { font-size: 11px; padding: 2px 8px; border-radius: 6px; background: var(--chip); color: var(--accent); border: 1px solid var(--border); }

table.kv { width: 100%; border-collapse: collapse; font-size: 13px; }
table.kv td { padding: 5px 0; vertical-align: top; }
table.kv td.k { color: var(--muted); width: 116px; white-space: nowrap; padding-right: 12px; }
table.kv td.v { word-break: break-all; font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; font-size: 12.5px; }

.fp { display: flex; align-items: center; gap: 8px; margin: 3px 0; }
.fp .lbl { color: var(--muted); width: 52px; font-size: 12px; }
.fp .val { font-family: ui-monospace, monospace; font-size: 12.5px; word-break: break-all; flex: 1; }
.fp code { background: var(--panel-2); padding: 1px 6px; border-radius: 5px; }

button.copy {
  background: var(--panel-2); color: var(--text); border: 1px solid var(--border);
  border-radius: 6px; padding: 3px 10px; font-size: 12px; cursor: pointer; transition: .12s;
}
button.copy:hover { border-color: var(--accent); color: var(--accent); }
button.ghost { background: transparent; }

.validity-ok { color: var(--accent-2); }
.validity-bad { color: var(--warn); }

.history { margin-top: 28px; }
.history h2 { font-size: 15px; margin: 0 0 10px; }
.hitem { display: flex; align-items: center; gap: 10px; padding: 8px 12px; border: 1px solid var(--border);
  border-radius: 9px; margin-bottom: 8px; cursor: pointer; background: var(--panel); font-size: 13px; }
.hitem:hover { border-color: var(--accent); }
.hitem .hn { flex: 1; word-break: break-all; }
.hitem .hm { color: var(--muted); font-size: 11.5px; white-space: nowrap; }
.empty { color: var(--muted); font-size: 12.5px; }
.hitem .hdel { flex: none; width: 22px; height: 22px; margin-left: 4px; border: 1px solid var(--border);
  background: transparent; color: var(--muted); border-radius: 6px; cursor: pointer; font-size: 15px;
  line-height: 1; display: flex; align-items: center; justify-content: center; transition: all .15s; }
.hitem .hdel:hover { color: #fff; background: #e5484d; border-color: #e5484d; }

.foot { color: var(--muted); font-size: 11.5px; margin-top: 30px; text-align: center; }
a { color: var(--accent); }

/* 内容区 / FAQ（P1 静态解释，可爬取） */
.info { margin-top: 34px; padding-top: 22px; border-top: 1px solid var(--border); font-size: 14px; line-height: 1.7; }
.info h2 { font-size: 17px; margin: 26px 0 10px; }
.info h2:first-child { margin-top: 0; }
.info p { margin: 0 0 12px; color: var(--text); }
.info ul { margin: 0 0 12px; padding-left: 20px; }
.info li { margin: 0 0 8px; }
.info code { font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; font-size: 12.5px; background: var(--panel-2); padding: 1px 5px; border-radius: 5px; }
.info b { color: var(--accent); font-weight: 600; }
.faq { margin-top: 6px; }
.faq details { border: 1px solid var(--border); border-radius: 9px; padding: 0 14px; margin-bottom: 8px; background: var(--panel); }
.faq summary { cursor: pointer; padding: 12px 0; font-weight: 600; font-size: 14px; list-style: none; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: '+'; float: right; color: var(--muted); font-weight: 400; }
.faq details[open] summary::after { content: '\2212'; }
.faq details p { margin: 0 0 12px; color: var(--text); }