/* 见君信笺 · 一屏双栏工坊 */

:root {
  --la-header-h: 3rem;
  --la-cream: #faf7f2;
  --la-paper: #fffefb;
  --la-warm: #f3ebe0;
  --la-accent: #a86b7a;
  --la-accent-deep: #8e4f62;
  --la-ink: #3d2a30;
  --la-ink-light: #5c4249;
  --la-muted: #8a7579;
  --la-line: rgba(61, 42, 48, 0.1);
  --la-line-strong: rgba(61, 42, 48, 0.16);
  --la-panel: rgba(255, 253, 250, 0.96);
  --la-shadow: rgba(61, 42, 48, 0.08);
  --la-shadow-lg: rgba(61, 42, 48, 0.14);
  --la-radius: 12px;
  --la-radius-sm: 8px;
  --la-font-ui: system-ui, -apple-system, 'PingFang SC', 'Microsoft YaHei', sans-serif;
  --la-font-hand-active: 'LXGW WenKai', '霞鹜文楷', 'KaiTi', serif;
  --la-letter-spacing: 0.04em;
  --la-font-display: 'Songti SC', 'STSong', 'SimSun', serif;
  --la-letter-size: 20px;
  --la-letter-leading: 2.35;
  --la-line-height: 47px;
  --la-rule-shift: 0px;
  --la-letter-w: 300px;
  --la-ratio-portrait: 1.414;
  --la-ratio-landscape: 0.707;
  --la-frame-w: 2.15rem;
  --la-frame-color: #e8b8cc;
  --la-sheet-color: #fffdfb;
  --la-ornament-color: #8a4860;
  --la-rule-color: rgba(138, 72, 96, 0.14);
  --la-preview-w: calc(var(--la-letter-w) * var(--la-ratio-portrait) + 2.5rem);
  --la-page-sheet-h: 520px;
}

*, *::before, *::after { box-sizing: border-box; }

html { height: 100%; }

body.la-app {
  margin: 0;
  height: 100%;
  overflow: hidden;
  font-family: var(--la-font-ui);
  color: var(--la-ink);
  background: var(--la-cream);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

/* —— 背景 —— */
.la-ambient { position: fixed; inset: 0; z-index: 0; pointer-events: none; overflow: hidden; }
.la-texture {
  position: absolute; inset: 0; opacity: 0.3;
  background-image: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='%23a86b7a' fill-opacity='0.04'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/svg%3E");
}
.la-glow { position: absolute; border-radius: 50%; filter: blur(90px); }
.la-glow--a { width: 40vw; max-width: 24rem; top: -8%; right: 5%; background: rgba(232, 184, 204, 0.2); }
.la-glow--b { width: 35vw; max-width: 20rem; bottom: 0; left: 0; background: rgba(220, 200, 168, 0.25); }

/* —— 顶栏 —— */
.la-header {
  position: relative; z-index: 50; height: var(--la-header-h); flex-shrink: 0;
  background: rgba(250, 247, 242, 0.9);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--la-line);
}
.la-header__inner {
  height: 100%; max-width: 1100px; margin: 0 auto; padding: 0 1rem;
  display: grid; grid-template-columns: 1fr auto 1fr; align-items: center;
}
.la-header__back {
  justify-self: start; display: inline-flex; align-items: center; gap: 0.15rem;
  font-size: 0.75rem; color: var(--la-accent); text-decoration: none;
}
.la-header__back-icon { font-size: 1.1rem; line-height: 1; }
.la-header__brand { display: flex; align-items: center; gap: 0.5rem; justify-self: center; }
.la-header__mark {
  display: grid; place-items: center; width: 2rem; height: 2rem;
  font-family: var(--la-font-display); font-size: 1rem; color: var(--la-accent-deep);
  background: var(--la-paper); border: 1px solid var(--la-line); border-radius: 6px;
}
.la-header__title { margin: 0; font-family: var(--la-font-display); font-size: 1.05rem; font-weight: 600; letter-spacing: 0.15em; }
.la-header__forum {
  justify-self: end; font-size: 0.75rem; color: var(--la-muted); text-decoration: none;
  padding: 0.25rem 0.65rem; border-radius: 999px; border: 1px solid var(--la-line); background: var(--la-paper);
}

/* —— 工作区：一屏双栏 —— */
.la-workspace {
  position: relative; z-index: 1;
  height: calc(100vh - var(--la-header-h));
  max-width: 1100px; margin: 0 auto;
  padding: 0.65rem 1rem;
  display: grid;
  grid-template-columns: minmax(260px, 340px) var(--la-preview-w);
  gap: 0.85rem;
  justify-content: center;
  align-items: stretch;
  min-height: 0;
}

.la-editor { min-height: 0; display: flex; flex-direction: column; }

.la-panel--editor {
  flex: 1; min-height: 0;
  display: flex; flex-direction: column;
  background: var(--la-panel);
  border: 1px solid var(--la-line);
  border-radius: var(--la-radius);
  box-shadow: 0 2px 16px var(--la-shadow);
  overflow: hidden;
}

/* 标签页 */
.la-tabs {
  display: flex; flex-shrink: 0;
  border-bottom: 1px solid var(--la-line);
  background: var(--la-warm);
}
.la-tab {
  flex: 1; padding: 0.55rem 0.5rem;
  font-family: var(--la-font-ui); font-size: 0.75rem; font-weight: 600;
  letter-spacing: 0.08em; color: var(--la-muted);
  background: none; border: none; cursor: pointer;
  border-bottom: 2px solid transparent;
  transition: color 0.15s, border-color 0.15s;
}
.la-tab.is-active { color: var(--la-accent-deep); border-bottom-color: var(--la-accent-deep); background: var(--la-panel); }

.la-tab-panels { flex: 1; min-height: 0; overflow: hidden; position: relative; }
.la-tab-panel {
  height: 100%; overflow-y: auto; padding: 0.75rem 0.85rem;
  scrollbar-width: thin;
}
.la-tab-panel[hidden] { display: none; }
.la-tab-panel[data-panel="write"]:not([hidden]) {
  display: flex; flex-direction: column; overflow: hidden;
}

.la-block { margin-bottom: 0.65rem; }
.la-block:last-child { margin-bottom: 0; }
.la-block__label {
  margin: 0 0 0.4rem; font-size: 0.625rem; font-weight: 600;
  letter-spacing: 0.12em; color: var(--la-muted); text-transform: uppercase;
}

/* 配色 */
.la-preset-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 0.35rem; }
.la-preset {
  display: flex; flex-direction: column; align-items: center; gap: 0.25rem;
  padding: 0.35rem 0.2rem; border: 1px solid var(--la-line); border-radius: var(--la-radius-sm);
  background: var(--la-paper); cursor: pointer; font-family: var(--la-font-ui);
}
.la-preset.is-active { border-color: var(--la-accent); box-shadow: 0 0 0 1px rgba(168, 107, 122, 0.2); }
.la-preset__swatch {
  width: 1.75rem; height: 1rem; border-radius: 3px;
  background: linear-gradient(120deg, var(--c1) 33%, var(--c2) 33% 66%, var(--c3) 66%);
  border: 1px solid rgba(0,0,0,.05);
}
.la-preset__name { font-size: 0.625rem; color: var(--la-ink-light); }

.la-block--colors { padding: 0.55rem; background: var(--la-warm); border-radius: var(--la-radius-sm); }
.la-color-row { display: flex; gap: 0.5rem; justify-content: space-between; }
.la-color-chip {
  flex: 1; display: flex; flex-direction: column; align-items: center; gap: 0.25rem;
  cursor: pointer; position: relative;
}
.la-color-chip input[type="color"] {
  position: absolute; inset: 0; width: 100%; height: 2rem; opacity: 0; cursor: pointer;
}
.la-color-chip__ring {
  width: 2rem; height: 2rem; border-radius: 50%;
  border: 2px solid var(--la-paper); box-shadow: 0 1px 4px var(--la-shadow);
  pointer-events: none;
}
.la-color-chip:nth-child(1) .la-color-chip__ring { background: var(--la-frame-color); }
.la-color-chip:nth-child(2) .la-color-chip__ring { background: var(--la-sheet-color); }
.la-color-chip:nth-child(3) .la-color-chip__ring { background: var(--la-ornament-color); }
.la-color-chip__text { font-size: 0.625rem; color: var(--la-muted); }

/* 边纹选择 */
.la-block__hint {
  margin: 0.25rem 0 0.65rem;
  font-size: 0.6875rem;
  line-height: 1.45;
  color: var(--la-muted);
}

.la-block--templates .la-template-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0.45rem;
}

.la-template-card {
  display: flex;
  flex-direction: column;
  align-items: stretch;
  gap: 0.35rem;
  padding: 0.35rem;
  border: 1px solid rgba(61, 42, 48, 0.12);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.72);
  cursor: pointer;
  transition: border-color 0.15s, box-shadow 0.15s;
}

.la-template-card.is-active {
  border-color: var(--la-accent);
  box-shadow: 0 0 0 1px rgba(168, 107, 122, 0.2);
}

.la-template-card__thumb {
  display: block;
  width: 100%;
  aspect-ratio: 1 / 1.414;
  border-radius: 4px;
  background-size: cover;
  background-position: center;
  background-color: #f6f0ea;
}

.la-template-card__thumb--custom {
  display: grid;
  place-items: center;
  font-size: 1.5rem;
  color: var(--la-accent);
  background-image: none;
  border: 1px dashed rgba(168, 107, 122, 0.35);
}

.la-template-card__name {
  font-size: 0.625rem;
  color: var(--la-ink-light);
  text-align: center;
  line-height: 1.2;
}

.la-block--patterns .la-pattern-grid {
  display: grid; grid-template-columns: 1fr 1fr; gap: 0.35rem;
}
.la-pattern-card {
  display: flex; flex-direction: column; align-items: stretch; gap: 0.25rem;
  padding: 0.35rem 0.4rem; border: 1px solid var(--la-line); border-radius: var(--la-radius-sm);
  background: var(--la-paper); cursor: pointer;
}
.la-pattern-card input { position: absolute; opacity: 0; pointer-events: none; }
.la-pattern-card.is-active { border-color: var(--la-accent); background: rgba(250, 247, 242, 0.9); }
.la-pattern-card__preview {
  height: 1.65rem; border-radius: 3px;
  background-color: var(--la-pattern-preview-bg, #f3d4de);
  border: 1px solid rgba(0,0,0,.04);
}
.la-pattern-card__preview--baroque {
  background-color: var(--la-ornament-color, #8a4860);
  mask: url('../svg/baroque-edge-h.svg') center / 92% auto no-repeat;
  -webkit-mask: url('../svg/baroque-edge-h.svg') center / 92% auto no-repeat;
}
.la-pattern-card__preview--rococo {
  background-color: var(--la-ornament-color, #7a6040);
  mask: url('../svg/rococo-edge-h.svg') center / 92% auto no-repeat;
  -webkit-mask: url('../svg/rococo-edge-h.svg') center / 92% auto no-repeat;
}
.la-pattern-card__preview--floral {
  background-color: var(--la-ornament-color, #9a5068);
  mask: url('../svg/floral-edge-h.svg') center / 92% auto no-repeat;
  -webkit-mask: url('../svg/floral-edge-h.svg') center / 92% auto no-repeat;
}
.la-pattern-card__name { font-size: 0.625rem; color: var(--la-ink-light); text-align: center; line-height: 1.2; }

/* 表单 */
.la-form-row--2 { display: grid; grid-template-columns: 1fr 1fr; gap: 0.5rem; }
.la-field { display: block; margin-bottom: 0.5rem; }
.la-field--grow { flex: 1; display: flex; flex-direction: column; margin-bottom: 0.5rem; min-height: 0; }
.la-field__label {
  display: block; font-size: 0.625rem; font-weight: 600;
  letter-spacing: 0.08em; color: var(--la-muted); margin-bottom: 0.25rem;
}

.la-input, .la-textarea, .la-select {
  width: 100%; padding: 0.4rem 0.55rem;
  font-family: var(--la-font-ui); font-size: 0.8125rem; color: var(--la-ink);
  background: var(--la-paper); border: 1px solid var(--la-line); border-radius: 6px;
}
.la-input:focus, .la-textarea:focus, .la-select:focus {
  outline: none; border-color: var(--la-accent); box-shadow: 0 0 0 2px rgba(168, 107, 122, 0.12);
}
.la-textarea { flex: 1; min-height: 5.5rem; resize: none; line-height: 1.65; }

.la-tune-row { display: grid; grid-template-columns: 1fr 1fr; gap: 0.5rem; margin-bottom: 0.5rem; }
.la-tune__label {
  display: flex; justify-content: space-between; font-size: 0.625rem; color: var(--la-muted); margin-bottom: 0.2rem;
}
.la-tune__label output { font-weight: 600; color: var(--la-accent-deep); }
.la-tune input[type='range'] { width: 100%; height: 3px; accent-color: var(--la-accent-deep); }

.la-export-bar { display: flex; gap: 0.45rem; margin-bottom: 0.45rem; }
.la-export-bar .la-select { flex: 1; }
.la-actions { display: flex; gap: 0.35rem; flex-wrap: wrap; }

.la-btn {
  padding: 0.38rem 0.75rem; font-family: var(--la-font-ui); font-size: 0.75rem; font-weight: 500;
  border-radius: 6px; border: 1px solid transparent; cursor: pointer;
}
.la-btn--ghost { color: var(--la-ink-light); background: var(--la-paper); border-color: var(--la-line); }
.la-btn--primary { color: #fff; background: var(--la-accent-deep); flex-shrink: 0; }
.la-btn:disabled { opacity: 0.55; cursor: wait; }

/* —— 预览区：宽度贴合信纸 —— */
.la-preview-wrap {
  width: var(--la-preview-w);
  min-height: 0;
  display: flex; flex-direction: column;
}

.la-preview-header {
  display: flex; align-items: center; justify-content: space-between;
  margin-bottom: 0.4rem; padding: 0 0.15rem; flex-shrink: 0;
}
.la-preview-header__title {
  margin: 0; font-family: var(--la-font-display);
  font-size: 0.8125rem; font-weight: 600; letter-spacing: 0.12em; color: var(--la-ink-light);
}
.la-preview-badge {
  font-size: 0.5625rem; padding: 0.15rem 0.45rem; border-radius: 999px;
  color: var(--la-accent-deep); background: var(--la-paper); border: 1px solid var(--la-line);
}
.la-preview-badge.is-idle { color: var(--la-muted); }

.la-preview-desk {
  flex: 1; min-height: 0;
  background: linear-gradient(165deg, #ebe4d8, #e2d9cc);
  border: 1px solid var(--la-line);
  border-radius: var(--la-radius);
  box-shadow: inset 0 1px 8px rgba(61, 42, 48, 0.05);
  display: flex; justify-content: center;
  padding: 0.75rem;
  overflow-x: hidden;
  overflow-y: auto;
}

.la-preview-scaler {
  transform-origin: top center;
  will-change: transform;
  width: 100%;
  display: flex;
  justify-content: center;
}

.la-letter-stack {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1rem;
  width: var(--la-letter-w);
}

.la-letter-stack[data-orientation="landscape"] {
  width: calc(var(--la-letter-w) * var(--la-ratio-portrait));
}

.la-letter-measure {
  position: fixed;
  left: -10000px;
  top: 0;
  visibility: hidden;
  pointer-events: none;
  width: var(--la-letter-w);
}

.la-letter-measure[data-orientation="landscape"] {
  width: calc(var(--la-letter-w) * var(--la-ratio-portrait));
}

/* —— 信纸：图片模板模式 —— */
.la-letter {
  position: relative;
  width: var(--la-letter-w);
  border-radius: 2px;
  box-shadow:
    0 14px 36px rgba(61, 42, 48, 0.14),
    0 4px 12px rgba(61, 42, 48, 0.08);
}

.la-letter.la-letter--template {
  box-sizing: border-box;
  padding:
    var(--la-safe-top, 14%)
    var(--la-safe-right, 11%)
    var(--la-safe-bottom, 12%)
    var(--la-safe-left, 11%);
  background-color: #f8f4f0;
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
}

.la-letter.la-letter--template.la-letter--portrait {
  width: var(--la-letter-w);
  height: calc(var(--la-letter-w) * var(--la-ratio-portrait));
  min-height: calc(var(--la-letter-w) * var(--la-ratio-portrait));
  max-height: calc(var(--la-letter-w) * var(--la-ratio-portrait));
}

.la-letter.la-letter--template.la-letter--landscape {
  width: calc(var(--la-letter-w) * var(--la-ratio-portrait));
  height: var(--la-letter-w);
  min-height: var(--la-letter-w);
  max-height: var(--la-letter-w);
}

.la-orient-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.4rem;
}

.la-orient-btn {
  padding: 0.5rem 0.65rem;
  border: 1px solid rgba(61, 42, 48, 0.12);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.72);
  font-size: 0.75rem;
  color: var(--la-ink-light);
  cursor: pointer;
  transition: border-color 0.15s, box-shadow 0.15s, color 0.15s;
}

.la-orient-btn.is-active {
  border-color: var(--la-accent);
  color: var(--la-accent-deep);
  box-shadow: 0 0 0 1px rgba(168, 107, 122, 0.2);
}
.la-orn.is-painted {
  mask-image: none !important;
  -webkit-mask-image: none !important;
  background: none !important;
}

.la-orn__img {
  display: block;
  width: 100%;
  height: 100%;
  pointer-events: none;
  user-select: none;
}

.la-letter__border { position: absolute; inset: 0; pointer-events: none; }

.la-orn {
  position: absolute;
  background-color: var(--la-ornament-color);
  mask-repeat: no-repeat;
  -webkit-mask-repeat: no-repeat;
  mask-position: center;
  -webkit-mask-position: center;
}

.la-orn--corner {
  width: calc(var(--la-frame-w) + 6px);
  height: calc(var(--la-frame-w) + 6px);
  mask-size: contain;
  -webkit-mask-size: contain;
}
.la-orn--tl { top: 2px; left: 2px; }
.la-orn--tr { top: 2px; right: 2px; transform: scaleX(-1); }
.la-orn--bl { bottom: 2px; left: 2px; transform: scaleY(-1); }
.la-orn--br { bottom: 2px; right: 2px; transform: scale(-1); }

.la-orn--edge { opacity: 0.9; }
.la-orn--top, .la-orn--bottom {
  left: var(--la-frame-w);
  right: var(--la-frame-w);
  height: calc(var(--la-frame-w) - 4px);
  mask-size: 100% 100%;
  -webkit-mask-size: 100% 100%;
}
.la-orn--top { top: 4px; }
.la-orn--bottom { bottom: 4px; transform: scaleY(-1); }

.la-letter[data-pattern="baroque"] .la-orn--corner {
  mask-image: url('../svg/baroque-corner.svg');
  -webkit-mask-image: url('../svg/baroque-corner.svg');
}
.la-letter[data-pattern="baroque"] .la-orn--edge {
  mask-image: url('../svg/baroque-edge-h.svg');
  -webkit-mask-image: url('../svg/baroque-edge-h.svg');
}
.la-letter[data-pattern="rococo"] .la-orn--corner {
  mask-image: url('../svg/rococo-corner.svg');
  -webkit-mask-image: url('../svg/rococo-corner.svg');
}
.la-letter[data-pattern="rococo"] .la-orn--edge {
  mask-image: url('../svg/rococo-edge-h.svg');
  -webkit-mask-image: url('../svg/rococo-edge-h.svg');
}
.la-letter[data-pattern="floral"] .la-orn--corner {
  mask-image: url('../svg/floral-corner.svg');
  -webkit-mask-image: url('../svg/floral-corner.svg');
}
.la-letter[data-pattern="floral"] .la-orn--edge {
  mask-image: url('../svg/floral-edge-h.svg');
  -webkit-mask-image: url('../svg/floral-edge-h.svg');
}

.la-letter__sheet {
  position: relative;
  min-height: var(--la-page-sheet-h);
  height: var(--la-page-sheet-h);
  max-height: var(--la-page-sheet-h);
  padding: 1.4rem 1.3rem 1.55rem;
  background-color: var(--la-sheet-color);
  border-radius: 1px;
  box-shadow:
    0 0 0 1px rgba(0, 0, 0, 0.04),
    inset 0 1px 0 rgba(255, 255, 255, 0.95);
  display: flex;
  flex-direction: column;
}

.la-letter--template .la-letter__sheet {
  height: 100%;
  min-height: 0;
  max-height: none;
  padding: 0;
  background: transparent;
  box-shadow: none;
}

.la-letter__head {
  position: relative; text-align: center; margin-bottom: 1rem;
  padding-bottom: 0.65rem; border-bottom: 1px solid var(--la-rule-color); flex-shrink: 0;
}
.la-letter__salute { margin: 0; font-family: var(--la-font-display); font-size: 0.95rem; letter-spacing: 0.3em; color: var(--la-ink-light); }
.la-letter__date {
  display: block; margin-top: 0.4rem;
  font-family: var(--la-font-hand-active);
  font-size: 0.8125rem; letter-spacing: 0.1em; color: var(--la-muted);
}

/* 正文区：横线与文字共用同一行高网格 */
.la-letter__body {
  position: relative;
  flex: 1;
  min-height: 0;
  overflow: hidden;
  color: var(--la-ink);
}

.la-letter__body-rules {
  position: absolute;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background-image: repeating-linear-gradient(
    to bottom,
    transparent,
    transparent calc(var(--la-line-height) - 1px),
    var(--la-rule-color) calc(var(--la-line-height) - 1px),
    var(--la-line-height)
  );
  background-size: 100% var(--la-line-height);
  background-position: 0 var(--la-rule-shift, 0px);
}

.la-letter__body-flow {
  position: relative;
  z-index: 1;
  font-family: var(--la-font-hand-active);
  font-size: var(--la-letter-size);
  line-height: var(--la-line-height);
  letter-spacing: var(--la-letter-spacing, 0.04em);
}

.la-letter__para {
  margin: 0;
  text-indent: 2em;
  word-break: break-word;
  line-height: var(--la-line-height);
}
.la-letter__para + .la-letter__para {
  margin-top: var(--la-line-height);
}
.la-letter__para--placeholder {
  text-indent: 0;
  text-align: center;
  color: var(--la-muted);
  font-size: 0.9em;
}

.la-letter__foot {
  position: relative; margin-top: auto; padding-top: 1rem;
  display: flex; align-items: flex-end; justify-content: flex-end; gap: 0.75rem; flex-shrink: 0;
}
.la-letter__sign {
  font-family: var(--la-font-hand-active);
  font-size: calc(var(--la-letter-size) + 1px);
  letter-spacing: 0.15em;
  text-align: right;
  line-height: var(--la-line-height);
  white-space: pre-line;
}
.la-letter__seal {
  flex-shrink: 0; width: 2.5rem; height: 2.5rem; display: grid; place-items: center;
  border-radius: 50%; font-family: var(--la-font-display); font-size: 0.9rem; font-weight: 600;
  color: var(--la-ornament-color);
  background: var(--la-seal-bg, #c995a8);
  border: 2px solid var(--la-seal-border, rgba(138, 72, 96, 0.65));
  transform: rotate(-12deg);
}

.la-letter__page-num {
  position: absolute;
  right: 0.85rem;
  bottom: 0.45rem;
  font-family: var(--la-font-display);
  font-size: 0.625rem;
  letter-spacing: 0.08em;
  color: var(--la-muted);
  opacity: 0.75;
  pointer-events: none;
}

/* 导出抓拍：去掉外阴影，避免画布留白 */
.la-letter--capturing {
  box-shadow: none !important;
}

.la-letter--capturing .la-letter__border {
  z-index: 3;
}

.la-letter--capturing .la-orn.is-painted {
  overflow: visible;
  background: none !important;
}

.la-letter--capturing .la-orn__img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: fill;
}

.la-export-orn-mount {
  position: relative;
  background: transparent !important;
  overflow: visible;
}

.la-export-capture-stage {
  position: fixed;
  left: -99999px;
  top: 0;
  z-index: -1;
  pointer-events: none;
  margin: 0;
  padding: 0;
  border: 0;
  background: transparent;
  overflow: visible;
}

.la-export-stage .la-letter {
  transform: none !important;
  margin: 0 !important;
  flex-shrink: 0;
}

/* 导出遮罩 */
.la-export-overlay {
  position: fixed; inset: 0; z-index: 200; display: grid; place-items: center;
  background: rgba(61, 42, 48, 0.35); backdrop-filter: blur(4px);
}
.la-export-overlay[hidden] { display: none; }
.la-export-overlay__box { padding: 1.25rem 1.75rem; border-radius: var(--la-radius); background: var(--la-paper); text-align: center; }
.la-export-spinner {
  width: 1.75rem; height: 1.75rem; margin: 0 auto 0.6rem;
  border: 2px solid var(--la-line); border-top-color: var(--la-accent-deep);
  border-radius: 50%; animation: la-spin 0.8s linear infinite;
}
@keyframes la-spin { to { transform: rotate(360deg); } }

/* 窄屏：允许滚动 */
@media (max-width: 820px) {
  body.la-app { height: auto; overflow: auto; }
  .la-workspace {
    height: auto; min-height: calc(100vh - var(--la-header-h));
    grid-template-columns: 1fr;
    max-width: 480px;
  }
  .la-preview-wrap { width: 100%; }
  .la-preview-desk { min-height: 420px; }
  .la-letter__sheet { height: var(--la-page-sheet-h); min-height: var(--la-page-sheet-h); max-height: var(--la-page-sheet-h); }
  .la-preview-scaler { transform: none !important; }
}

@media (max-width: 480px) {
  .la-preset-grid { grid-template-columns: repeat(2, 1fr); }
  .la-form-row--2 { grid-template-columns: 1fr; }
  :root { --la-letter-w: min(100%, 300px); --la-frame-w: 1.85rem; }
}

@media print {
  body.la-app { height: auto; overflow: visible; }
  .la-ambient, .la-header, .la-editor, .la-preview-header, .la-export-overlay { display: none !important; }
  .la-workspace { display: block; padding: 0; height: auto; max-width: none; }
  .la-preview-wrap { width: 100%; }
  .la-preview-desk { background: none; border: none; box-shadow: none; padding: 0; }
  .la-preview-scaler { transform: none !important; }
  .la-letter-stack { width: 100%; gap: 0; }
  .la-letter { box-shadow: none; width: 100%; max-width: none; page-break-after: always; break-after: page; }
  .la-letter:last-child { page-break-after: auto; break-after: auto; }
  .la-letter__sheet { height: var(--la-page-sheet-h); max-height: none; min-height: var(--la-page-sheet-h); }
  .la-letter-measure { display: none !important; }
}

@media (prefers-reduced-motion: reduce) {
  .la-export-spinner { animation: none; }
}