:root {
  --brand: #F97316;
  --brand-dark: #EA670C;
  --brand-soft: #FFF3E9;
  --bg: #FBFBFD;
  --surface: #FFFFFF;
  --text: #1F2430;
  --muted: #6B7280;
  --border: #E5E7EB;
  --ok: #16A34A;
  --warn: #D97706;
  --radius: 14px;
  --shadow: 0 6px 24px rgba(31, 36, 48, 0.08);
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", Roboto, Helvetica, Arial, sans-serif;
}

* { box-sizing: border-box; }

html, body { margin: 0; padding: 0; }

body {
  font-family: var(--font);
  color: var(--text);
  background: var(--bg);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

/* ---------- Header ---------- */
.site-header {
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
  padding: 18px 22px;
  background: linear-gradient(135deg, #fff 0%, var(--brand-soft) 100%);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 20;
}
.brand { display: flex; align-items: center; gap: 10px; font-weight: 800; font-size: 20px; }
.brand-dot {
  width: 14px; height: 14px; border-radius: 50%;
  background: var(--brand);
  box-shadow: 0 0 0 4px rgba(249, 115, 22, 0.18);
}
.brand-name { color: var(--brand-dark); }
.site-slogan { margin: 0; color: var(--muted); font-size: 14px; flex: 1 1 240px; }
.ghost-btn {
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text);
  padding: 8px 14px;
  border-radius: 999px;
  cursor: pointer;
  font-size: 14px;
}
.ghost-btn:hover { border-color: var(--brand); color: var(--brand-dark); }

/* ---------- Layout ---------- */
.container { max-width: 1080px; margin: 0 auto; padding: 22px 16px 60px; }

.tabs { display: flex; gap: 10px; margin-bottom: 18px; flex-wrap: wrap; }
.tab {
  flex: 1 1 200px;
  border: 1px solid var(--border);
  background: var(--surface);
  padding: 14px 16px;
  border-radius: var(--radius);
  font-size: 16px;
  font-weight: 700;
  cursor: pointer;
  transition: all .15s ease;
}
.tab.active { border-color: var(--brand); color: var(--brand-dark); box-shadow: var(--shadow); background: var(--brand-soft); }

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

.subtabs { display: flex; gap: 8px; margin-bottom: 14px; flex-wrap: wrap; }
.subtab {
  border: 1px solid var(--border);
  background: var(--surface);
  padding: 8px 14px;
  border-radius: 999px;
  cursor: pointer;
  font-size: 14px;
}
.subtab.active { border-color: var(--brand); color: var(--brand-dark); background: var(--brand-soft); }
.subpanel { display: none; }
.subpanel.active { display: block; }

.hint {
  background: var(--brand-soft);
  border: 1px solid #FCE3CE;
  color: #92450B;
  padding: 10px 14px;
  border-radius: 10px;
  font-size: 13.5px;
  margin: 0 0 16px;
}

/* ---------- Dropzone ---------- */
.dropzone {
  border: 2px dashed var(--border);
  border-radius: var(--radius);
  background: var(--surface);
  padding: 36px 20px;
  text-align: center;
  cursor: pointer;
  transition: border-color .15s, background .15s;
}
.dropzone.drag { border-color: var(--brand); background: var(--brand-soft); }
.dropzone-inner { display: flex; flex-direction: column; gap: 6px; color: var(--muted); }
.dropzone-inner strong { color: var(--text); font-size: 16px; }

/* ---------- Editor ---------- */
.editor { margin-top: 16px; }
.canvas-wrap {
  position: relative;
  background:
    linear-gradient(45deg, #eee 25%, transparent 25%) 0 0 / 20px 20px,
    linear-gradient(-45deg, #eee 25%, transparent 25%) 0 0 / 20px 20px,
    linear-gradient(45deg, transparent 75%, #eee 75%) 0 0 / 20px 20px,
    linear-gradient(-45deg, transparent 75%, #eee 75%) 0 0 / 20px 20px,
    #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: auto;
  max-height: 60vh;
  display: flex;
  justify-content: center;
}
.canvas-inner { position: relative; max-width: 100%; line-height: 0; }
.canvas-inner canvas { display: block; width: 100%; height: auto; touch-action: none; }
.mask-layer { position: absolute; inset: 0; width: 100%; height: 100%; cursor: crosshair; }

.toolbar {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 16px;
  align-items: center;
  margin-top: 14px;
}
.toolbar label { display: flex; align-items: center; gap: 8px; font-size: 13px; color: var(--muted); }
.toolbar input[type="range"] { width: 120px; }
.mode-toggle { display: inline-flex; gap: 0; border: 1px solid var(--border); border-radius: 999px; overflow: hidden; }
.seg {
  border: none; background: var(--surface); color: var(--text);
  padding: 8px 14px; cursor: pointer; font-size: 14px; font-weight: 600;
}
.seg.active { background: var(--brand); color: #fff; }

/* ---------- Buttons ---------- */
.btn {
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text);
  padding: 10px 16px;
  border-radius: 10px;
  cursor: pointer;
  font-size: 14px;
  font-weight: 600;
  transition: all .15s;
}
.btn:hover { border-color: var(--brand); }
.btn.primary { background: var(--brand); border-color: var(--brand); color: #fff; }
.btn.primary:hover { background: var(--brand-dark); }
.btn.ghost { background: transparent; }
.btn:disabled { opacity: .5; cursor: not-allowed; }

/* ---------- Fields ---------- */
.field { display: flex; flex-direction: column; gap: 6px; font-size: 14px; margin-bottom: 14px; }
.field > span { color: var(--muted); font-weight: 600; }
.field input, .field select, .field textarea {
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 10px 12px;
  font-size: 14px;
  font-family: inherit;
  background: var(--surface);
  color: var(--text);
}
.field input:focus, .field select:focus, .field textarea:focus { outline: 2px solid var(--brand); border-color: var(--brand); }
.field.grow { flex: 1; }
.row { display: flex; gap: 12px; flex-wrap: wrap; align-items: flex-end; margin-bottom: 14px; }

.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 18px;
  box-shadow: var(--shadow);
}
.card h2 { margin: 0 0 8px; font-size: 17px; color: var(--brand-dark); }

.preview { margin-top: 12px; }
.preview video, .preview img { max-width: 100%; border-radius: 10px; border: 1px solid var(--border); }
.preview .placeholder {
  border: 1px dashed var(--border);
  border-radius: 10px;
  padding: 24px;
  text-align: center;
  color: var(--muted);
  font-size: 14px;
}

.status { font-size: 13.5px; margin: 10px 0 0; min-height: 18px; color: var(--muted); }
.status.ok { color: var(--ok); }
.status.warn { color: var(--warn); }
.status.err { color: #DC2626; }

/* ---------- Footer ---------- */
.site-footer { text-align: center; color: var(--muted); font-size: 13px; padding: 24px 16px 40px; border-top: 1px solid var(--border); }

/* ---------- Modal ---------- */
.modal {
  position: fixed; inset: 0;
  background: rgba(15, 23, 42, 0.45);
  display: flex; align-items: center; justify-content: center;
  z-index: 50; padding: 16px;
}
.modal[hidden] { display: none; }
.modal-card {
  background: var(--surface);
  border-radius: var(--radius);
  padding: 22px;
  max-width: 460px; width: 100%;
  box-shadow: var(--shadow);
}
.modal-card h2 { margin: 0 0 8px; color: var(--brand-dark); }

/* ---------- Responsive ---------- */
@media (max-width: 760px) {
  .grid-2 { grid-template-columns: 1fr; }
  .site-slogan { flex-basis: 100%; }
  .toolbar input[type="range"] { width: 90px; }
  .tab { flex-basis: 100%; }
}