:root {
  --bg: #f4f6f8;
  --panel: #ffffff;
  --line: #e2e6ea;
  --text: #1f2937;
  --muted: #6b7280;
  --brand: #2563eb;
  --brand-dark: #1d4ed8;
  --ok: #16a34a;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

body {
  font-family: "PingFang SC", "Microsoft YaHei", "Segoe UI", system-ui, sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.wrap { max-width: 1100px; margin: 0 auto; padding: 0 20px; width: 100%; }

.topbar {
  background: linear-gradient(120deg, #1e3a8a, #2563eb);
  color: #fff;
  padding: 26px 0;
}
.topbar h1 { font-size: 26px; letter-spacing: 1px; }
.topbar .sub { font-size: 14px; opacity: .8; font-weight: normal; margin-left: 8px; }
.topbar .tagline { margin-top: 6px; font-size: 13px; opacity: .85; }

main { flex: 1; padding: 24px 20px 40px; }

.step { display: none; }
.step.active { display: block; }

.panel {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 22px;
  box-shadow: 0 2px 10px rgba(15, 23, 42, .04);
}

.step-head { margin-bottom: 14px; }
.step-head h2 { font-size: 18px; margin-bottom: 4px; }

.muted { color: var(--muted); }
.small { font-size: 12.5px; line-height: 1.6; }
.badge {
  font-size: 11px; background: #fde68a; color: #92400e;
  border-radius: 20px; padding: 2px 8px; vertical-align: 2px; margin-left: 4px;
}

/* 上传 */
.upload-panel { text-align: center; padding: 30px 20px; }
#dropZone { cursor: pointer; transition: border-color .2s; }
#dropZone.dragover { border-color: var(--brand); background: #eff6ff; }
.upload-inner { padding: 30px 10px; }
.upload-icon {
  font-size: 40px; width: 84px; height: 84px; line-height: 84px;
  border-radius: 50%; background: #eff6ff; color: var(--brand);
  margin: 0 auto 14px; font-weight: bold;
}
.upload-title { font-size: 16px; margin-bottom: 6px; }
.upload-hint { color: var(--muted); font-size: 13px; margin-bottom: 18px; }
.sample-row {
  margin-top: 16px; border-top: 1px dashed var(--line); padding-top: 14px;
  display: flex; justify-content: center; align-items: flex-start; gap: 16px;
  font-size: 13px; color: var(--muted);
}
.flow { list-style: none; text-align: left; display: grid; gap: 4px; }
.flow b { color: var(--brand); }

/* 工作区 */
.work-row { display: flex; gap: 16px; align-items: flex-start; }
.process-row { gap: 16px; }
.canvas-box {
  flex: 1; min-width: 0; background: #fafafa;
  border: 1px solid var(--line); border-radius: 10px;
  padding: 8px; text-align: center;
}
.canvas-box canvas { max-width: 100%; height: auto; border-radius: 6px; background: repeating-conic-gradient(#eee 0 25%, #fff 0 50%) 0 0 / 20px 20px; }
.preview-box { flex: 1; }
.canvas-caption { font-size: 12px; color: var(--muted); margin-top: 6px; }

.side { width: 230px; flex-shrink: 0; display: flex; flex-direction: column; gap: 10px; }
.side .muted { border-top: 1px dashed var(--line); padding-top: 10px; }

/* 按钮 */
.btn {
  display: inline-block; border: 1px solid var(--line); background: #fff;
  color: var(--text); padding: 8px 16px; border-radius: 8px;
  font-size: 13.5px; cursor: pointer; transition: all .15s;
}
.btn:hover { border-color: var(--brand); color: var(--brand); }
.btn.primary {
  background: var(--brand); border-color: var(--brand); color: #fff;
}
.btn.primary:hover { background: var(--brand-dark); color: #fff; }
.btn.big { padding: 12px 22px; font-size: 15px; }
.btn.ghost { background: transparent; }
.btn:disabled { opacity: .55; cursor: not-allowed; }

/* 控件 */
.controls {
  margin-top: 18px; border-top: 1px solid var(--line); padding-top: 16px;
  display: grid; grid-template-columns: 1.2fr 1fr 1fr; gap: 20px;
}
.ctrl-group h3 { font-size: 14px; margin-bottom: 10px; color: var(--text); }
.ctrl-group label {
  display: block; font-size: 13px; color: var(--muted);
  margin-bottom: 8px;
}
.ctrl-group input[type="range"] { width: 100%; margin-top: 2px; accent-color: var(--brand); }
.ctrl-group .btn { margin-top: 6px; }

/* 导出 */
.export-row {
  margin-top: 18px; border-top: 1px solid var(--line); padding-top: 16px;
  display: flex; align-items: flex-end; justify-content: flex-end; gap: 14px; flex-wrap: wrap;
}
.export-options { display: flex; gap: 18px; margin-right: auto; }
.export-options label { font-size: 13px; color: var(--muted); display: grid; gap: 4px; }
select {
  padding: 8px 10px; border: 1px solid var(--line); border-radius: 8px;
  background: #fff; font-size: 13.5px; min-width: 150px;
}
.status { margin-top: 12px; font-size: 13px; color: var(--brand); min-height: 18px; }
.status.error { color: #dc2626; }
.status.ok { color: var(--ok); }

.foot { text-align: center; padding: 18px 0 30px; font-size: 12px; }

/* 发布到官网选材库 */
.publish-box {
  margin-top: 18px;
  display: flex; align-items: center; flex-wrap: wrap; gap: 16px 22px;
  background: #f8fafc; border: 1px dashed var(--line); border-radius: 10px;
  padding: 14px 16px;
}
.publish-fields { display: flex; gap: 18px; flex-wrap: wrap; }
.publish-fields label { font-size: 13px; color: var(--muted); display: grid; gap: 4px; }
.publish-fields input[type="text"] {
  width: 240px; max-width: 100%; padding: 8px 10px;
  border: 1px solid var(--line); border-radius: 8px; font-size: 13.5px;
}
.publish-fields input[type="text"]:focus { outline: none; border-color: var(--brand); }
.publish-toggle {
  font-size: 13px; color: var(--text); display: inline-flex; align-items: center; gap: 6px;
  cursor: pointer; user-select: none;
}
.publish-toggle input { accent-color: var(--brand); width: 15px; height: 15px; cursor: pointer; }
.publish-status { width: 100%; font-size: 13px; color: var(--muted); min-height: 18px; display: flex; align-items: center; flex-wrap: wrap; gap: 8px; }
.publish-status.ok { color: var(--ok); }
.publish-status.error { color: #dc2626; }
.publish-status a { color: var(--brand); font-weight: 500; }
.publish-retry { width: 100%; }
.publish-retry .btn { font-size: 13px; }

@media (max-width: 900px) {
  .work-row { flex-direction: column; }
  .side { width: 100%; flex-direction: row; align-items: center; flex-wrap: wrap; }
  .controls { grid-template-columns: 1fr; }
  .export-row { flex-direction: column; align-items: stretch; }
  .export-options { margin-right: 0; }
}