:root {
  --bg: #0c0b0d;
  --bg-2: #121014;
  --panel: #151318;
  --panel-2: #1b181e;
  --line: rgba(255, 255, 255, 0.075);
  --line-strong: rgba(255, 255, 255, 0.14);
  --text: #ece7e6;
  --dim: #8f868c;
  --dim-2: #6a636a;
  --rose: #e2606f;
  --rose-2: #f2a49c;
  --rose-deep: #a83d51;
  --ok: #7fd1a8;
  --radius: 12px;
  --shadow: 0 24px 60px rgba(0, 0, 0, 0.55);
  --sans: -apple-system, BlinkMacSystemFont, "SF Pro SC", "PingFang SC", "Helvetica Neue", "Microsoft YaHei", sans-serif;
  --serif: "Songti SC", "Noto Serif SC", "Source Han Serif SC", Georgia, serif;
}

* { box-sizing: border-box; }
[hidden] { display: none !important; }

html, body {
  margin: 0;
  height: 100%;
  background: var(--bg);
  color: var(--text);
  font-family: var(--sans);
  -webkit-font-smoothing: antialiased;
}

body {
  display: flex;
  flex-direction: column;
  overflow: hidden;
  background:
    radial-gradient(1200px 700px at 18% -10%, rgba(226, 96, 111, 0.10), transparent 60%),
    radial-gradient(900px 600px at 88% 110%, rgba(120, 90, 160, 0.10), transparent 55%),
    var(--bg);
}

/* ---------- 顶栏 ---------- */
.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 12px 22px;
  border-bottom: 1px solid var(--line);
  background: rgba(12, 11, 13, 0.72);
  backdrop-filter: blur(14px);
  z-index: 5;
}

.brand { display: flex; align-items: center; gap: 12px; }

.mark {
  width: 26px; height: 26px; border-radius: 50%;
  background: radial-gradient(circle at 32% 28%, var(--rose-2), var(--rose) 45%, var(--rose-deep) 100%);
  box-shadow: 0 0 22px rgba(226, 96, 111, 0.45), inset 0 0 6px rgba(0, 0, 0, 0.3);
}

.brand-text h1 {
  margin: 0;
  font-family: var(--serif);
  font-size: 19px;
  font-weight: 600;
  letter-spacing: 0.06em;
  display: flex; align-items: baseline; gap: 4px;
}
.brand-text .dot { color: var(--rose); }
.brand-text .thin { font-size: 12px; color: var(--dim-2); letter-spacing: 0.14em; font-family: var(--sans); text-transform: uppercase; }
.brand-text p { margin: 2px 0 0; font-size: 11px; color: var(--dim-2); letter-spacing: 0.05em; }

.top-actions { display: flex; align-items: center; gap: 10px; }
.privacy { font-size: 11px; color: var(--dim); border: 1px solid var(--line); padding: 5px 9px; border-radius: 999px; }

/* ---------- 通用按钮 ---------- */
.btn {
  appearance: none;
  border: 1px solid var(--line-strong);
  background: rgba(255, 255, 255, 0.04);
  color: var(--text);
  font-family: inherit;
  font-size: 12.5px;
  padding: 8px 14px;
  border-radius: 9px;
  cursor: pointer;
  transition: background 0.15s ease, border-color 0.15s ease, transform 0.12s ease, color 0.15s ease;
  letter-spacing: 0.02em;
}
.btn:hover { background: rgba(255, 255, 255, 0.08); border-color: rgba(255, 255, 255, 0.2); }
.btn:active { transform: translateY(1px); }
.btn:disabled { opacity: 0.42; cursor: not-allowed; transform: none; }
.btn.ghost { background: transparent; }
.btn.tiny { padding: 5px 10px; font-size: 11.5px; border-radius: 7px; color: var(--dim); flex: none; white-space: nowrap; }
.btn.tiny[aria-pressed="true"] { color: #fff; border-color: rgba(226, 96, 111, 0.55); background: rgba(226, 96, 111, 0.14); }
.btn.primary {
  border: none;
  color: #1a0b0d;
  font-weight: 650;
  background: linear-gradient(135deg, var(--rose-2), var(--rose) 55%, #cf4f67);
  box-shadow: 0 10px 26px rgba(226, 96, 111, 0.28);
}
.btn.primary:hover { filter: brightness(1.06); }
.btn.wide { width: 100%; padding: 12px 16px; font-size: 13.5px; }

.link {
  background: none; border: none; color: var(--dim); font-size: 11.5px;
  cursor: pointer; font-family: inherit; padding: 2px 0;
}
.link:hover { color: var(--rose-2); }

/* ---------- 主布局 ---------- */
.layout {
  flex: 1;
  min-height: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr) 352px;
}

/* ---------- 舞台 ---------- */
.stage-wrap { display: flex; flex-direction: column; min-width: 0; min-height: 0; }

.stage-toolbar {
  display: flex; align-items: center; justify-content: space-between;
  gap: 12px; padding: 10px 18px; border-bottom: 1px solid var(--line);
}
.tool-left { display: flex; align-items: center; gap: 8px; min-width: 0; }
.meta { font-size: 11.5px; color: var(--dim); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.hint { font-size: 11.5px; color: var(--dim-2); }

.stage {
  position: relative;
  flex: 1;
  min-height: 0;
  overflow: auto;
  display: grid;
  place-items: center;
  padding: 22px;
  background:
    radial-gradient(700px 420px at 50% 40%, rgba(255, 255, 255, 0.035), transparent 70%),
    #0a090b;
}
.stage::before {
  content: "";
  position: absolute; inset: 0; pointer-events: none;
  background-image: radial-gradient(rgba(255,255,255,0.06) 0.5px, transparent 0.5px);
  background-size: 3px 3px;
  opacity: 0.35;
  mix-blend-mode: overlay;
}

.frame { position: relative; display: inline-block; }
.canvas-stack { position: relative; line-height: 0; box-shadow: var(--shadow); border-radius: 4px; overflow: hidden; }
.canvas-stack canvas { display: block; width: 100%; height: 100%; }
#canvas-res { position: absolute; inset: 0; clip-path: inset(0 0 0 50%); }

.divider {
  position: absolute; top: 0; bottom: 0; left: 50%; width: 2px;
  background: rgba(255, 255, 255, 0.75);
  box-shadow: 0 0 12px rgba(0, 0, 0, 0.6);
  cursor: ew-resize; display: none; touch-action: none;
}
.divider .grip {
  position: absolute; top: 50%; left: 50%; width: 30px; height: 30px;
  transform: translate(-50%, -50%);
  border-radius: 50%; background: rgba(255, 255, 255, 0.92);
  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.5);
}
.divider .grip::before, .divider .grip::after {
  content: ""; position: absolute; top: 50%; width: 0; height: 0;
  border-top: 4px solid transparent; border-bottom: 4px solid transparent;
}
.divider .grip::before { left: 8px; border-right: 5px solid #6c5560; transform: translateY(-50%); }
.divider .grip::after { right: 8px; border-left: 5px solid #6c5560; transform: translateY(-50%); }
.compare .divider { display: block; }

.tag {
  position: absolute; top: 10px; padding: 4px 9px; border-radius: 6px;
  font-size: 10.5px; letter-spacing: 0.12em; text-transform: uppercase;
  background: rgba(10, 9, 11, 0.62); color: rgba(255, 255, 255, 0.82);
  backdrop-filter: blur(8px); border: 1px solid rgba(255, 255, 255, 0.1);
  display: none;
}
.tag-before { left: 10px; }
.tag-after { right: 10px; }
.compare .tag { display: block; }

.processing {
  position: absolute; left: 50%; bottom: 16px; transform: translateX(-50%);
  display: none; align-items: center; gap: 8px;
  background: rgba(14, 12, 15, 0.82); border: 1px solid var(--line-strong);
  padding: 7px 13px; border-radius: 999px; font-size: 11.5px; color: var(--text);
  backdrop-filter: blur(10px);
}
.processing.on { display: flex; }
.processing span {
  width: 12px; height: 12px; border-radius: 50%;
  border: 1.5px solid rgba(255,255,255,0.25); border-top-color: var(--rose);
  animation: spin 0.7s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* ---------- 拖拽区 ---------- */
.dropzone {
  width: min(560px, 92%);
  border: 1px dashed rgba(255, 255, 255, 0.16);
  border-radius: 18px;
  padding: 46px 30px;
  text-align: center;
  background: linear-gradient(180deg, rgba(255,255,255,0.028), rgba(255,255,255,0.006));
  transition: border-color 0.2s ease, background 0.2s ease, transform 0.2s ease;
}
.dropzone.drag { border-color: var(--rose); background: rgba(226, 96, 111, 0.08); transform: scale(1.01); }
.dz-icon { font-size: 34px; color: var(--rose); opacity: 0.85; line-height: 1; }
.dropzone h2 { font-family: var(--serif); font-weight: 600; font-size: 21px; margin: 16px 0 8px; letter-spacing: 0.04em; }
.dropzone p { color: var(--dim); font-size: 12.5px; line-height: 1.75; margin: 0 auto; max-width: 380px; }
.dz-actions { display: flex; gap: 10px; justify-content: center; margin: 22px 0 16px; }
.dz-note { color: var(--dim-2) !important; font-size: 11px !important; }

/* ---------- 侧栏 ---------- */
.panel {
  min-width: 0;
  border-left: 1px solid var(--line);
  background: linear-gradient(180deg, var(--panel), var(--bg-2));
  display: flex; flex-direction: column; min-height: 0;
}
.panel > * { flex: none; }
.panel-head {
  display: flex; align-items: baseline; justify-content: space-between;
  padding: 15px 18px 8px;
}
.panel-head h3 { margin: 0; font-size: 12px; font-weight: 600; letter-spacing: 0.16em; color: var(--text); text-transform: uppercase; }
.dim { font-size: 11px; color: var(--dim-2); }

.tabs { display: flex; gap: 6px; padding: 0 18px 12px; }
.tab {
  flex: 1; padding: 7px 6px; font-size: 11.5px; border-radius: 8px; cursor: pointer;
  border: 1px solid var(--line); background: rgba(255,255,255,0.02); color: var(--dim);
  font-family: inherit; letter-spacing: 0.04em; transition: all 0.15s ease;
}
.tab:hover { color: var(--text); border-color: var(--line-strong); }
.tab.active {
  color: #fff; border-color: rgba(226, 96, 111, 0.55);
  background: rgba(226, 96, 111, 0.14);
}
.group-panel[hidden] { display: none !important; }

.presets {
  min-width: 0; max-width: 100%;
  display: flex; gap: 8px; padding: 0 18px 8px; overflow-x: auto;
  scrollbar-width: thin; scrollbar-color: rgba(255,255,255,0.18) transparent;
  scroll-snap-type: x proximity;
  mask-image: linear-gradient(90deg, #000 0, #000 calc(100% - 26px), transparent 100%);
  -webkit-mask-image: linear-gradient(90deg, #000 0, #000 calc(100% - 26px), transparent 100%);
}
.presets::-webkit-scrollbar { height: 5px; }
.presets::-webkit-scrollbar-thumb { background: rgba(255,255,255,0.16); border-radius: 3px; }
.preset {
  text-align: left; padding: 8px 10px; flex: 0 0 146px; scroll-snap-align: start; border-radius: 10px; cursor: pointer;
  border: 1px solid var(--line); background: rgba(255, 255, 255, 0.025);
  color: var(--text); font-family: inherit; transition: all 0.16s ease;
}
.preset:hover { border-color: var(--line-strong); background: rgba(255, 255, 255, 0.055); }
.preset.active {
  border-color: rgba(226, 96, 111, 0.6);
  background: linear-gradient(160deg, rgba(226, 96, 111, 0.20), rgba(226, 96, 111, 0.05));
  box-shadow: 0 0 0 1px rgba(226, 96, 111, 0.18), 0 12px 26px rgba(0, 0, 0, 0.35);
}
.preset .name { font-size: 12.5px; font-weight: 600; letter-spacing: 0.03em; }
.preset .desc { font-size: 10.5px; color: var(--dim); margin-top: 3px; line-height: 1.4; }
.preset.active .desc { color: rgba(255, 226, 226, 0.72); }

#sliders {
  padding: 0 18px 10px; overflow-y: auto; flex: 1 1 auto; min-height: 0;
  scrollbar-width: thin; scrollbar-color: rgba(255,255,255,0.18) transparent;
}
#sliders::-webkit-scrollbar { width: 6px; }
#sliders::-webkit-scrollbar-thumb { background: rgba(255,255,255,0.16); border-radius: 3px; }
.group-title {
  font-size: 10px; color: var(--dim-2); letter-spacing: 0.18em; text-transform: uppercase;
  margin: 13px 0 4px; display: flex; align-items: center; gap: 8px;
}
.group-title::after { content: ""; flex: 1; height: 1px; background: var(--line); }

.slider-row { padding: 7px 0 3px; }
.slider-top { display: flex; align-items: baseline; justify-content: space-between; margin-bottom: 7px; gap: 8px; }
.slider-label { font-size: 12px; color: var(--text); letter-spacing: 0.02em; }
.slider-val {
  font-variant-numeric: tabular-nums; font-size: 10.5px; color: var(--dim);
  background: rgba(255, 255, 255, 0.05); border-radius: 5px; padding: 1px 6px; min-width: 28px; text-align: center;
}

input[type="range"] {
  -webkit-appearance: none; appearance: none; width: 100%; height: 18px; background: transparent; cursor: pointer;
}
input[type="range"]::-webkit-slider-runnable-track {
  height: 3px; border-radius: 2px;
  background: linear-gradient(90deg, var(--rose) var(--fill, 60%), rgba(255, 255, 255, 0.11) var(--fill, 60%));
}
input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none; width: 13px; height: 13px; border-radius: 50%;
  background: #fff; margin-top: -5px;
  box-shadow: 0 0 0 3px rgba(226, 96, 111, 0.22), 0 2px 6px rgba(0, 0, 0, 0.5);
  transition: box-shadow 0.15s ease;
}
input[type="range"]:hover::-webkit-slider-thumb { box-shadow: 0 0 0 5px rgba(226, 96, 111, 0.26), 0 2px 6px rgba(0, 0, 0, 0.5); }
input[type="range"]::-moz-range-track { height: 3px; border-radius: 2px; background: rgba(255,255,255,0.12); }
input[type="range"]::-moz-range-thumb { width: 13px; height: 13px; border: none; border-radius: 50%; background: #fff; }

.panel-tip {
  margin: 2px 18px 12px; padding: 10px 12px; border-radius: 10px;
  border: 1px dashed rgba(255,255,255,0.09); background: rgba(255,255,255,0.018);
  font-size: 10.8px; line-height: 1.75; color: var(--dim-2);
}
.panel-tip b { color: var(--rose-2); font-weight: 500; }

.panel-foot {
  border-top: 1px solid var(--line); padding: 12px 18px 14px;
  background: linear-gradient(180deg, rgba(21, 19, 24, 0.4), rgba(10, 9, 11, 0.9));
  backdrop-filter: blur(8px);
}
.foot-row { display: flex; gap: 8px; margin-bottom: 8px; }
.foot-row .btn { flex: 1; }
.foot-note { margin: 4px 0 0; font-size: 10.5px; color: var(--dim-2); line-height: 1.6; }

.toast {
  position: fixed; left: 50%; bottom: 26px; transform: translateX(-50%);
  background: rgba(20, 18, 22, 0.94); border: 1px solid var(--line-strong);
  color: var(--text); font-size: 12px; padding: 9px 15px; border-radius: 9px;
  box-shadow: var(--shadow); z-index: 50; max-width: 80vw;
}

/* ---------- 窄屏 ---------- */
body.brush-on .toast { bottom: 118px; }

@media (max-width: 960px) {
  body { overflow: auto; height: auto; }
  .layout { grid-template-columns: minmax(0, 1fr); }
  body { overflow-x: hidden; }
  .stage-wrap { min-height: 0; }
  .panel { border-left: none; border-top: 1px solid var(--line); }
  #sliders { overflow: visible; }
  .stage { padding: 14px; min-height: 0; }
  .hint { display: none; }
  .brand-text p { display: none; }
  .privacy { display: none; }
  .topbar { padding: 10px 14px; gap: 8px; }
  .brand { gap: 9px; min-width: 0; }
  .brand-text { min-width: 0; }
  .brand-text h1 { font-size: 17px; }
  .brand-text .thin { display: none; }
  .brand-text .dot { display: none; }
  .top-actions { flex: none; }
  .top-actions .btn { padding: 7px 11px; font-size: 12px; }
  .stage-toolbar { padding: 8px 12px; }
  .tool-left { flex: 1; min-width: 0; }
  .meta { min-width: 0; }
  .panel-head, .presets, #sliders, .panel-tip, .panel-foot { padding-left: 14px; padding-right: 14px; }
  .preset { flex-basis: 132px; }
  .tabs { padding: 0 14px 10px; }
  .frame { max-width: 100%; }
  .divider .grip { width: 36px; height: 36px; }
}

/* ---------- 蒙版叠加 & 画笔 ---------- */
#canvas-mask {
  position: absolute; inset: 0; pointer-events: none;
  display: none; mix-blend-mode: normal;
}
.canvas-stack.show-mask #canvas-mask { display: block; }
.canvas-stack.show-mask #canvas-res { filter: saturate(0.55) brightness(0.92) contrast(1.02); }
.canvas-stack.brushing { touch-action: none; cursor: none; }
.canvas-stack.brushing #canvas-mask { display: block; }

.brush-cursor {
  position: absolute; border-radius: 50%; pointer-events: none;
  border: 1.5px solid rgba(255, 255, 255, 0.9);
  box-shadow: 0 0 0 1px rgba(0, 0, 0, 0.55), inset 0 0 0 1px rgba(0, 0, 0, 0.4);
  transform: translate(-50%, -50%); z-index: 6;
}
.brush-cursor.erase { border-color: rgba(140, 200, 255, 0.95); }

.brushbar {
  position: absolute; left: 50%; bottom: 14px; transform: translateX(-50%);
  display: flex; align-items: center; gap: 10px; flex-wrap: wrap; justify-content: center;
  padding: 9px 12px; border-radius: 14px; max-width: calc(100% - 24px);
  background: rgba(16, 14, 18, 0.9); border: 1px solid rgba(255, 255, 255, 0.14);
  backdrop-filter: blur(14px); box-shadow: 0 14px 40px rgba(0, 0, 0, 0.5);
  z-index: 7;
}
.brushbar .seg { display: flex; background: rgba(255, 255, 255, 0.05); border-radius: 9px; padding: 2px; }
.brushbar .seg button {
  border: none; background: transparent; color: var(--dim); font-size: 11.5px; font-family: inherit;
  padding: 6px 10px; border-radius: 7px; cursor: pointer;
}
.brushbar .seg button.on { background: rgba(226, 96, 111, 0.22); color: #fff; }
.brushbar .seg button.on[data-mode="erase"] { background: rgba(110, 170, 255, 0.22); }
.mini-range { display: flex; align-items: center; gap: 7px; font-size: 11px; color: var(--dim); }
.mini-range input { width: 96px; accent-color: var(--rose); }
.mini-range b { color: var(--text); font-weight: 500; font-variant-numeric: tabular-nums; min-width: 22px; }
.brush-hint { font-size: 10.5px; color: var(--dim-2); }

.ai-badge {
  display: inline-flex; align-items: center; gap: 6px; font-size: 10.5px;
  padding: 4px 9px; border-radius: 999px; color: #f3d6da;
  border: 1px solid rgba(226, 96, 111, 0.35); background: rgba(226, 96, 111, 0.10);
  white-space: nowrap;
}
.ai-badge i {
  width: 6px; height: 6px; border-radius: 50%; background: var(--rose);
  box-shadow: 0 0 8px var(--rose); animation: pulse 1.8s ease-in-out infinite;
}
@keyframes pulse { 0%,100% { opacity: 0.35; transform: scale(0.85); } 50% { opacity: 1; transform: scale(1); } }

.mask-chip {
  position: absolute; top: 10px; left: 10px; z-index: 6; display: none;
  align-items: center; gap: 6px; padding: 5px 9px; border-radius: 999px;
  font-size: 10.5px; color: #d8fff8; background: rgba(10, 24, 24, 0.72);
  border: 1px solid rgba(80, 230, 210, 0.45); backdrop-filter: blur(8px);
}
.mask-chip::before {
  content: ""; width: 6px; height: 6px; border-radius: 50%; background: #45e0cd;
  box-shadow: 0 0 8px #45e0cd;
}
@media (max-width: 960px) { .mask-chip.show { display: inline-flex; } }

.scanline {
  position: absolute; left: 0; right: 0; top: 0; height: 28%; pointer-events: none;
  background: linear-gradient(to bottom, transparent, rgba(226, 96, 111, 0.16), rgba(255, 255, 255, 0.22), transparent);
  opacity: 0; z-index: 5;
}
.scanline.run { animation: scan 1.15s cubic-bezier(0.4, 0, 0.2, 1) 1; }
@keyframes scan {
  0% { transform: translateY(-40%); opacity: 0; }
  25% { opacity: 1; }
  100% { transform: translateY(360%); opacity: 0; }
}

body.brush-on .toast { bottom: 118px; }

@media (max-width: 960px) {
  .ai-badge { display: none; }
  .brushbar { gap: 6px; row-gap: 8px; padding: 8px 10px; width: calc(100% - 20px); }
  .brush-hint { display: none; }
  .mini-range { order: 3; flex: 1 0 100%; justify-content: center; font-size: 0; gap: 6px; }
  .mini-range input { width: 70%; }
  .mini-range b { font-size: 11px; min-width: 18px; }
  .brushbar .seg { flex: none; }
  .brushbar .seg button { padding: 7px 9px; }
  #brush-undo, #brush-clear { padding: 7px 10px; font-size: 12px; }
  .brushbar #brush-undo { margin-left: auto; }
  .stage.brushing { padding-bottom: 96px; }
  .toast { bottom: auto; top: 64px; }
  body.brush-on .toast { top: auto; bottom: 118px; }
  .stage-toolbar { overflow-x: auto; scrollbar-width: none; }
  .stage-toolbar::-webkit-scrollbar { display: none; }
}

/* ---------- 新手引导 ---------- */
.icon-btn {
  width: 30px; height: 30px; padding: 0; border-radius: 50%;
  font-size: 13px; line-height: 1; display: inline-grid; place-items: center;
  color: var(--dim);
}
.icon-btn:hover { color: var(--text); border-color: var(--line-strong); }

.coach { position: fixed; inset: 0; z-index: 200; }
.coach-hole {
  position: fixed; border-radius: 12px; pointer-events: none;
  box-shadow: 0 0 0 9999px rgba(8, 7, 9, 0.66);
  border: 1.5px solid rgba(255, 255, 255, 0.62);
  transition: top 0.22s cubic-bezier(0.2, 0.7, 0.3, 1), left 0.22s cubic-bezier(0.2, 0.7, 0.3, 1),
    width 0.22s cubic-bezier(0.2, 0.7, 0.3, 1), height 0.22s cubic-bezier(0.2, 0.7, 0.3, 1);
}
.coach-hole.hide { opacity: 0; }
.coach-card {
  position: fixed; width: min(320px, calc(100vw - 28px)); z-index: 201;
  background: rgba(21, 19, 24, 0.985); border: 1px solid var(--line-strong);
  border-radius: 14px; padding: 15px 16px 12px; box-shadow: var(--shadow);
}
.coach-step { font-size: 10px; letter-spacing: 0.18em; color: var(--rose-2); text-transform: uppercase; }
.coach-card h3 { font-family: var(--serif); font-size: 17px; margin: 6px 0 6px; letter-spacing: 0.02em; }
.coach-card p { font-size: 12.5px; line-height: 1.75; color: var(--dim); margin: 0 0 12px; }
.coach-card p b { color: var(--text); font-weight: 600; }
.coach-actions { display: flex; align-items: center; gap: 8px; }
.coach-actions .grow { flex: 1; }
.coach-actions .btn.tiny { padding: 6px 11px; }
@media (max-width: 960px) {
  .coach-card { left: 14px !important; right: 14px; bottom: 14px !important; top: auto !important; width: auto; }
}

/* ---------- 两步流程 ---------- */
.stepper { display: none; align-items: center; gap: 4px; }
.stepper .step {
  border: 1px solid var(--line); background: transparent; color: var(--dim);
  font-family: inherit; font-size: 11.5px; padding: 5px 10px; border-radius: 8px;
  display: inline-flex; align-items: center; gap: 6px; cursor: pointer; white-space: nowrap;
}
.stepper .step b {
  width: 15px; height: 15px; border-radius: 50%; font-size: 9.5px; font-weight: 600;
  display: inline-grid; place-items: center; background: rgba(255,255,255,.09); color: var(--dim);
}
.stepper .step.on { color: #fff; border-color: rgba(226,96,111,.55); background: rgba(226,96,111,.14); }
.stepper .step.on b { background: var(--rose); color: #1a0b0d; }
.stepper .sep { width: 10px; height: 1px; background: var(--line-strong); }
body.step-mask #stepper, body.step-style #stepper { display: inline-flex; }
body.step-mask .panel { display: none; }
body.step-mask .layout { grid-template-columns: minmax(0, 1fr); }
#btn-next-step { display: none; }
body.step-mask #btn-next-step { display: inline-flex; }
body.step-mask #btn-mask, body.step-mask #btn-brush { display: none; }
body.step-mask #btn-compare, body.step-mask #btn-zoom { display: none; }

@media (max-width: 960px) {
  body.step-mask .meta { display: none; }
  body.step-mask .tool-left { flex: 1; }
  body.step-mask .tool-right { flex: none; }
  .stepper .step { padding: 5px 8px; font-size: 11px; }
}

/* ---------- 保存到相册 ---------- */
.save-modal {
  position: fixed; inset: 0; z-index: 300; display: grid; place-items: center;
  background: rgba(6, 5, 7, 0.92); backdrop-filter: blur(6px); padding: 18px;
}
.save-card { width: min(520px, 100%); text-align: center; }
.save-tip { color: var(--text); font-size: 13px; margin: 0 0 10px; letter-spacing: .04em; }
#save-img {
  max-width: 100%; max-height: 66vh; border-radius: 10px; box-shadow: var(--shadow);
  user-select: auto; -webkit-user-select: auto; -webkit-touch-callout: default;
}
.save-actions { display: flex; gap: 8px; justify-content: center; margin-top: 12px; }
.save-actions .btn { min-width: 110px; }
.brush-cursor.smart { border-color: rgba(80, 240, 214, 0.95); }

/* ---------- 错误提示（兼容性排查用） ---------- */
.err-banner {
  position: fixed; left: 12px; right: 12px; top: 12px; z-index: 400;
  display: flex; align-items: center; gap: 10px;
  background: rgba(120, 32, 44, 0.96); border: 1px solid rgba(255, 150, 150, 0.35);
  color: #ffe9e9; font-size: 11.5px; line-height: 1.5; padding: 8px 10px 8px 12px;
  border-radius: 10px; box-shadow: 0 10px 30px rgba(0,0,0,.5);
}
.err-banner span { flex: 1; }
.err-banner button {
  border: none; background: transparent; color: #ffe9e9; font-size: 18px; line-height: 1;
  padding: 0 2px; cursor: pointer;
}

/* ---------- 触屏：加大命中区域 ---------- */
@media (pointer: coarse) {
  input[type="range"] { height: 36px; }
  input[type="range"]::-webkit-slider-runnable-track { height: 5px; }
  input[type="range"]::-webkit-slider-thumb {
    width: 24px; height: 24px; margin-top: -9.5px;
    box-shadow: 0 0 0 4px rgba(226, 96, 111, 0.22), 0 2px 8px rgba(0, 0, 0, 0.5);
  }
  .slider-row { padding: 11px 0 8px; }
  .btn.tiny { padding: 9px 12px; font-size: 12.5px; }
  .stepper .step { padding: 8px 10px; font-size: 12px; }
  .stepper .step b { width: 17px; height: 17px; }
  .brushbar .seg button { padding: 10px 12px; font-size: 12.5px; }
  .brushbar #brush-undo, .brushbar #brush-clear { padding: 9px 12px; }
  .mini-range input { height: 32px; }
  .preset { padding: 10px 12px; }
  .tabs .tab { padding: 10px 6px; font-size: 12px; }
  .icon-btn { width: 36px; height: 36px; }
}

/* ---------- HTTP 提示 ---------- */
.https-banner {
  position: fixed; left: 12px; right: 12px; top: 10px; z-index: 390;
  display: flex; align-items: center; gap: 10px; flex-wrap: wrap;
  background: rgba(60, 44, 18, 0.96); border: 1px solid rgba(240, 190, 110, 0.4);
  color: #ffe9c7; font-size: 11.5px; line-height: 1.5; padding: 8px 10px 8px 12px;
  border-radius: 10px; box-shadow: 0 10px 30px rgba(0,0,0,.45);
}
.https-banner span { flex: 1; min-width: 160px; }
.https-banner a { text-decoration: none; }
.https-banner button {
  border: none; background: transparent; color: #ffe9c7; font-size: 18px; line-height: 1;
  padding: 0 2px; cursor: pointer;
}
body.http-warn .err-banner { top: 78px; }

/* ---------- 自定义滑条（防误触：点击不跳、只跟随拖动） ---------- */
.cs {
  position: relative; height: 44px; margin: 2px 0 0;
  touch-action: pan-y; cursor: pointer; user-select: none; -webkit-user-select: none;
  outline: none;
}
.cs:focus-visible .cs-thumb { box-shadow: 0 0 0 6px rgba(226,96,111,.3), 0 2px 8px rgba(0,0,0,.5); }
.cs-track {
  position: absolute; left: 0; right: 0; top: 50%; height: 5px; transform: translateY(-50%);
  border-radius: 3px; background: rgba(255,255,255,.12); overflow: hidden;
}
.cs-fill {
  height: 100%; width: 0%;
  background: linear-gradient(90deg, var(--rose-2), var(--rose));
  border-radius: 3px;
}
.cs-thumb {
  position: absolute; top: 50%; width: 24px; height: 24px; border-radius: 50%;
  background: #fff; transform: translate(-50%, -50%);
  box-shadow: 0 0 0 4px rgba(226,96,111,.18), 0 2px 8px rgba(0,0,0,.5);
  transition: box-shadow .15s ease;
}
.cs.dragging .cs-thumb { box-shadow: 0 0 0 6px rgba(226,96,111,.28), 0 2px 10px rgba(0,0,0,.55); }
.cs-slot { display: block; width: 100%; }
.mini-range { flex: 0 0 auto; white-space: nowrap; }
.mini-range .cs-slot { flex: 0 0 120px; width: 120px; }
.mini-range .cs { width: 100%; height: 34px; }
.mini-range b { flex: none; }
.brushbar > * { flex: none; }
@media (pointer: coarse) {
  .cs { height: 46px; }
  .cs-thumb { width: 26px; height: 26px; }
  .mini-range .cs-slot { flex: 1 1 auto; width: auto; max-width: 200px; }
  .mini-range .cs { width: 100%; height: 38px; }
}

@media (max-width: 960px) {
  .mini-range {
    order: 3; flex: 1 0 100%; justify-content: center; font-size: 0; gap: 8px;
  }
  .mini-range .cs-slot { flex: 1 1 auto; width: auto; max-width: 220px; }
  .mini-range b { font-size: 11px; min-width: 18px; }
}

/* ---------- 蒙版步骤说明 & 底部下一步 ---------- */
.step-intro {
  display: none;
  padding: 12px 18px 0;
  max-width: 980px;
  width: 100%;
  margin: 0 auto;
}
body.step-mask .step-intro { display: block; }
.step-intro b { font-size: 12px; letter-spacing: .08em; color: var(--rose-2); font-weight: 600; }
.step-intro p { margin: 6px 0 0; font-size: 12.5px; line-height: 1.7; color: var(--dim); }
.step-foot { display: none; padding: 12px 18px 18px; }
body.step-mask .step-foot { display: block; }
.step-foot .btn { max-width: 980px; margin: 0 auto; display: block; }
.brush-idle { display: none; font-size: 11px; color: var(--dim); }
.brushbar.idle .brush-idle { display: inline; }
.brushbar.idle .brush-hint, .brushbar.idle #brush-undo, .brushbar.idle #brush-clear { display: none; }

body.step-mask .toast { bottom: 104px; }
@media (max-width: 960px) {
  body.step-mask .toast { bottom: 104px; top: auto; }
  .step-intro { padding: 10px 14px 0; }
  body.step-mask .stage { padding-bottom: 112px; }
  .step-intro p { font-size: 12px; }
  .step-foot { padding: 10px 14px 16px; }
}