:root {
  --bg: #f4efe6;
  --paper: #fffdf8;
  --card: #ffffff;
  --ink: #2a241c;
  --muted: #6f675c;
  --line: #e4dccf;
  --earth: #3d6b4f;
  --earth-ink: #245338;
  --accent: #c4713a;
  --danger: #a33b2b;
  --ok: #2f6b45;
  --shadow: 0 8px 24px rgba(42, 36, 28, 0.06);
  --radius: 14px;
  --max: 920px;
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  font-family: "Source Han Sans SC", "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  background: var(--bg);
  color: var(--ink);
  line-height: 1.65;
  min-height: 100vh;
}

a { color: var(--earth-ink); }
a:hover { color: var(--accent); }

.wrap { max-width: var(--max); margin: 0 auto; padding: 0 16px; }

.site-head {
  position: sticky;
  top: 0;
  z-index: 20;
  background: rgba(244, 239, 230, 0.92);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
}
.site-head .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  min-height: 56px;
}
.brand {
  display: flex;
  flex-direction: column;
  text-decoration: none;
  color: inherit;
  min-width: 0;
}
.brand strong { font-size: 16px; letter-spacing: 0.04em; color: var(--earth-ink); }
.brand span { font-size: 11px; color: var(--muted); }
.cross {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 12px;
  font-size: 13px;
  font-weight: 700;
}
.cross a {
  text-decoration: none;
  color: var(--earth);
}
.cross a[aria-current="page"] { color: var(--accent); }

.crumb {
  margin: 16px 0 8px;
  font-size: 12px;
  color: var(--muted);
}
.crumb a { text-decoration: none; }

h1 {
  margin: 0 0 10px;
  font-size: clamp(22px, 5vw, 32px);
  line-height: 1.25;
  color: var(--earth-ink);
}
.lead { margin: 0 0 14px; color: var(--ink); }
.privacy {
  margin: 0 0 20px;
  padding: 10px 12px;
  background: #eef6f1;
  border-radius: 10px;
  font-size: 13px;
  color: var(--earth-ink);
}

.workbench {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 16px;
  margin: 0 0 28px;
}
.dropzone {
  border: 1.5px dashed #c9bead;
  border-radius: 12px;
  padding: 28px 16px;
  text-align: center;
  background: var(--paper);
  cursor: pointer;
  position: relative;
}
.dropzone.drag { border-color: var(--earth); background: #eef6f1; }
.dropzone input[type="file"] {
  position: absolute;
  inset: 0;
  opacity: 0;
  cursor: pointer;
}
.dropzone p { margin: 0; color: var(--muted); font-size: 14px; }
.file-list { margin: 12px 0 0; font-size: 13px; color: var(--muted); }
.file-list li { margin: 4px 0; word-break: break-all; }

.row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 14px;
  align-items: flex-end;
}
.field { display: flex; flex-direction: column; gap: 4px; min-width: min(100%, 180px); flex: 1; }
.field.grow { flex: 2; }
.field label, .chk { font-size: 13px; color: var(--muted); }
input[type="text"], input[type="number"], input[type="datetime-local"], input[type="date"],
select, textarea {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 9px 10px;
  font: inherit;
  background: #fff;
  color: inherit;
}
textarea { min-height: 160px; resize: vertical; }
.pair { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
@media (max-width: 640px) { .pair { grid-template-columns: 1fr; } }

.btn, button.go, button.ghost {
  appearance: none;
  border: 0;
  border-radius: 10px;
  padding: 10px 16px;
  font: inherit;
  font-weight: 700;
  cursor: pointer;
}
button.go, .btn-primary {
  background: var(--earth);
  color: #fff;
}
button.go:disabled { opacity: 0.55; cursor: wait; }
button.ghost, .btn-ghost {
  background: transparent;
  color: var(--earth-ink);
  border: 1px solid var(--line);
}
.status { min-height: 1.4em; margin: 10px 0 0; font-size: 13px; color: var(--muted); }
.status.err { color: var(--danger); }
.status.ok { color: var(--ok); }

.preview {
  margin-top: 14px;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}
.preview img, .preview video, .preview canvas {
  max-width: 100%;
  border-radius: 8px;
  background: #111;
}
.outbox { margin-top: 12px; font-size: 13px; }

/* --- 源文件预览列表 --- */
.srclist {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 12px;
  margin-top: 14px;
}
.srcitem {
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--paper);
  overflow: hidden;
  display: flex;
  flex-direction: column;
}
.si-media {
  background: #201d18;
  display: grid;
  place-items: center;
  min-height: 132px;
  padding: 6px;
  color: #cbbfae;
  font-size: 12px;
}
.si-media img, .si-media canvas {
  max-width: 100%;
  max-height: 190px;
  border-radius: 6px;
  display: block;
}
.si-media video { max-width: 100%; max-height: 190px; border-radius: 6px; }
.si-media audio { width: 100%; }
.si-meta {
  padding: 8px 10px 10px;
  display: flex;
  flex-direction: column;
  gap: 2px;
  font-size: 12px;
  color: var(--muted);
}
.si-meta b {
  font-size: 13px;
  color: var(--ink);
  word-break: break-all;
  font-weight: 700;
}
.si-acts { display: flex; gap: 6px; margin-top: 6px; flex-wrap: wrap; }

button.mini {
  border: 1px solid var(--line);
  background: #fff;
  color: var(--earth-ink);
  border-radius: 8px;
  padding: 4px 10px;
  font: inherit;
  font-size: 12px;
  font-weight: 700;
  cursor: pointer;
}
button.mini.danger { color: var(--danger); }

/* --- 结果预览 --- */
.resultbox {
  margin-top: 16px;
  border: 1px solid #cfe0d5;
  border-radius: 12px;
  background: #f7fbf8;
  padding: 12px;
}
.rb-head {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  justify-content: space-between;
  align-items: baseline;
  font-size: 13px;
  color: var(--muted);
  margin-bottom: 10px;
}
.rb-head b { color: var(--earth-ink); font-size: 14px; }
.rb-body {
  display: flex;
  flex-direction: column;
  gap: 8px;
  align-items: flex-start;
}
.rb-body img, .rb-body canvas {
  max-width: 100%;
  max-height: 460px;
  border-radius: 8px;
  border: 1px solid var(--line);
  background: #fff;
}
.rb-body video { max-width: 100%; max-height: 460px; border-radius: 8px; background: #000; }
.rb-body audio { width: 100%; }
.rb-acts { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 12px; align-items: center; }
.rb-acts .btn { text-decoration: none; display: inline-block; }
.rb-note { margin: 8px 0 0; font-size: 12px; color: var(--muted); }
.rb-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(130px, 1fr));
  gap: 10px;
}
.rb-cell {
  display: flex;
  flex-direction: column;
  gap: 4px;
  align-items: center;
  font-size: 11px;
  color: var(--muted);
  text-align: center;
  word-break: break-all;
}
.rb-cell img {
  width: 100%;
  border-radius: 6px;
  border: 1px solid var(--line);
  background: #fff;
}

/* --- 进度条 --- */
.progbox {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-top: 10px;
  font-size: 12px;
  color: var(--muted);
}
.progbox .pg {
  flex: 1;
  height: 8px;
  border-radius: 999px;
  background: #e8e0d3;
  overflow: hidden;
}
.progbox .pg i {
  display: block;
  height: 100%;
  background: var(--earth);
  transition: width 0.2s;
}

/* --- 模式切换（合并 / 拆分同页） --- */
.modes {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin-bottom: 14px;
}
.modes button {
  border: 1px solid var(--line);
  background: #fff;
  color: var(--muted);
  border-radius: 999px;
  padding: 7px 16px;
  font: inherit;
  font-weight: 700;
  font-size: 13px;
  cursor: pointer;
}
.modes button.on {
  background: var(--earth);
  border-color: var(--earth);
  color: #fff;
}
.pane[hidden] { display: none; }

/* --- 播放器 + 时间轴取点 --- */
.stage {
  margin-top: 12px;
  background: #201d18;
  border-radius: 12px;
  padding: 8px;
}
.stage video, .stage audio { width: 100%; display: block; border-radius: 8px; }
.stage video { max-height: 400px; background: #000; }
.wave-wrap {
  margin-top: 10px;
  min-height: 88px;
  background: #1b1914;
  border-radius: 8px;
  overflow: hidden;
}
canvas.wave, canvas#wave, canvas#strip {
  display: block;
  width: 100%;
  height: 88px;
  margin: 0;
  cursor: ew-resize;
  background: #1b1914;
}
canvas#strip { height: 72px; }
.cmp {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
  margin-top: 12px;
}
.cmp > div {
  display: flex;
  flex-direction: column;
  gap: 6px;
  font-size: 12px;
  color: var(--muted);
}
.cmp canvas, .cmp img {
  width: 100%;
  border-radius: 8px;
  border: 1px solid var(--line);
  background: #fff;
}
#tiers { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 8px; }
.marks {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
  margin-top: 10px;
  font-size: 13px;
}
.marks .val {
  font-variant-numeric: tabular-nums;
  font-weight: 700;
  color: var(--earth-ink);
}

.grid-cats, .grid-tools {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 12px;
  margin: 16px 0 28px;
}
.card {
  display: block;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 14px 14px 12px;
  text-decoration: none;
  color: inherit;
  box-shadow: var(--shadow);
}
.card:hover { border-color: #c8d9ce; }
.card b { display: block; color: var(--earth-ink); margin-bottom: 4px; }
.card p { margin: 0; font-size: 13px; color: var(--muted); }
.card .tag {
  display: inline-block;
  margin-top: 8px;
  font-size: 11px;
  color: var(--earth);
  font-weight: 700;
}

h2 { font-size: 18px; color: var(--earth-ink); margin: 28px 0 10px; }
.howto, .faq, .related { margin-bottom: 24px; }
.howto ol { padding-left: 1.2em; }
.faq details {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 10px 12px;
  margin: 8px 0;
}
.faq summary { cursor: pointer; font-weight: 700; }
.related-list { display: flex; flex-wrap: wrap; gap: 8px; }
.related-list a {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 6px 12px;
  text-decoration: none;
  font-size: 13px;
}

.diff-view {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
  font-size: 13px;
}
@media (max-width: 720px) { .diff-view { grid-template-columns: 1fr; } }
.diff-view pre {
  white-space: pre-wrap;
  word-break: break-word;
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 10px;
  min-height: 120px;
}
ins { background: #d8f3e0; text-decoration: none; }
del { background: #f8d4d0; text-decoration: line-through; }

.swatch {
  width: 56px;
  height: 56px;
  border-radius: 10px;
  border: 1px solid var(--line);
}

.site-foot {
  margin-top: 40px;
  padding: 24px 0 32px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 13px;
}
.site-foot nav { display: flex; flex-wrap: wrap; gap: 10px 14px; margin-bottom: 8px; }
.site-foot a { text-decoration: none; }

.chkline { display: flex; align-items: center; gap: 8px; margin-top: 10px; font-size: 13px; }
.hint { font-size: 12px; color: var(--muted); margin: 8px 0 0; }

.chips {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 14px;
}
.chips .chip {
  appearance: none;
  border: 1px solid var(--line);
  background: var(--paper);
  border-radius: 12px;
  padding: 8px 12px;
  text-align: left;
  cursor: pointer;
  font: inherit;
  color: inherit;
}
.chips .chip b { display: block; font-size: 13px; }
.chips .chip small { display: block; font-size: 11px; color: var(--muted); }
.chips .chip.on {
  background: var(--earth);
  border-color: var(--earth);
  color: #fff;
}
.chips .chip.on small { color: rgba(255,255,255,0.8); }

.id-stage {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 14px;
  align-items: start;
  margin-top: 14px;
}
@media (max-width: 720px) {
  .id-stage { grid-template-columns: 1fr; }
}
.id-card {
  display: block;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: #fff;
}
.id-side { max-width: 220px; }