/* ============================================================
   Inkwell Engine · scene-mobile.css — 移动端动画场景
   四幕：语音构建 → 随身工作台 → 双模式预览 → 会话续写
   画布 1160×700；手机 300×620 居右，Act4 左侧滑入 PC 窗
   ============================================================ */

.mb-stage {
  position: relative;
  width: 1160px;
  height: 700px;
  transform-origin: top left;
  font-family: var(--font-body);
  background:
    radial-gradient(620px 460px at 62% 46%, rgba(61, 139, 255, 0.16), transparent 70%),
    radial-gradient(420px 320px at 22% 62%, rgba(139, 92, 246, 0.12), transparent 70%);
  border-radius: 20px;
  overflow: hidden;
}

.mb-stage .mb-phone-wrap {
  position: absolute;
  left: 560px;
  top: 34px;
  opacity: 0;
  transform: translateY(26px) scale(0.97);
  transition: opacity 0.8s ease, transform 0.8s cubic-bezier(0.16, 1, 0.3, 1);
  z-index: 6;
}
.mb-stage.on .mb-phone-wrap { opacity: 1; transform: none; }
.mb-stage.leaving .mb-phone-wrap { opacity: 0; transform: translateY(-16px) scale(0.98); }

/* ---------- 手机 ---------- */

.mb-phone {
  width: 300px;
  height: 632px;
  border-radius: 40px;
  border: 2px solid rgba(140, 170, 220, 0.32);
  background: #0d1626;
  box-shadow: 0 40px 110px rgba(0, 0, 0, 0.65), 0 0 80px rgba(61, 139, 255, 0.14);
  padding: 10px;
  position: relative;
}
.mb-screen {
  width: 100%;
  height: 100%;
  border-radius: 32px;
  background: #f6f8fb;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  color: #1f2937;
  position: relative;
}
.mb-notch {
  position: absolute;
  top: 8px;
  left: 50%;
  transform: translateX(-50%);
  width: 88px;
  height: 20px;
  border-radius: 0 0 12px 12px;
  background: #0d1626;
  z-index: 20;
}

/* 屏内头部 */
.mb-head {
  flex: 0 0 62px;
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 22px 15px 0;
  background: #fff;
}
.mb-head .ht { font-size: 14px; font-weight: 700; color: #1f2937; }
.mb-head .hst {
  font-size: 9px;
  font-weight: 600;
  padding: 2px 9px;
  border-radius: 999px;
  background: rgba(245, 158, 11, 0.12);
  color: #b45309;
  transition: all 0.5s ease;
}
.mb-head .hst.published { background: rgba(16, 185, 129, 0.12); color: #059669; }
.mb-head .sp { flex: 1; }
.mb-head .hava {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: linear-gradient(135deg, #3b82f6, #8b5cf6);
  color: #fff;
  font-size: 10px;
  font-weight: 700;
  display: grid;
  place-items: center;
}

/* 视图 */
.mb-view { flex: 1; min-height: 0; position: relative; }
.mb-pane {
  position: absolute;
  inset: 0;
  opacity: 0;
  transform: translateX(22px);
  transition: opacity 0.45s ease, transform 0.45s cubic-bezier(0.16, 1, 0.3, 1);
  pointer-events: none;
  display: flex;
  flex-direction: column;
}
.mb-pane.on { opacity: 1; transform: none; }
.mb-pane.back { transform: translateX(-22px); }

/* Act1 会话视图 */
.mb-chat { flex: 1; overflow: hidden; padding: 12px 12px 0; display: flex; flex-direction: column; gap: 9px; }
.mb-msg {
  max-width: 86%;
  font-size: 12px;
  line-height: 1.6;
  border-radius: 14px;
  padding: 8px 12px;
  opacity: 0;
  transform: translateY(10px) scale(0.97);
  transition: opacity 0.4s ease, transform 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}
.mb-msg.on { opacity: 1; transform: none; }
.mb-msg.ai { align-self: flex-start; background: #fff; border: 1px solid #eef2f7; color: #334155; border-top-left-radius: 4px; }
.mb-msg.ai b { color: #3b82f6; }
.mb-msg.user { align-self: flex-end; background: #3b82f6; color: #fff; border-top-right-radius: 4px; }
.mb-msg .dots { display: inline-flex; gap: 3px; align-items: center; height: 12px; }
.mb-msg .dots i { width: 4.5px; height: 4.5px; border-radius: 50%; background: #cbd5e1; animation: mbDots 1s ease-in-out infinite; }
.mb-msg .dots i:nth-child(2) { animation-delay: 0.15s; }
.mb-msg .dots i:nth-child(3) { animation-delay: 0.3s; }
@keyframes mbDots { 0%, 100% { opacity: 0.4; } 50% { opacity: 1; } }
.mb-msg.user .dots i { background: rgba(255, 255, 255, 0.7); }
.mb-msg .full { display: none; }
.mb-msg.typed .dots { display: none; }
.mb-msg.typed .full { display: inline; }

/* 语音进度卡 */
.mb-prog {
  align-self: flex-start;
  width: 88%;
  background: #fff;
  border: 1px solid #eef2f7;
  border-radius: 12px;
  padding: 9px 12px;
  opacity: 0;
  transform: translateY(10px);
  transition: opacity 0.45s ease, transform 0.45s cubic-bezier(0.16, 1, 0.3, 1);
}
.mb-prog.on { opacity: 1; transform: none; }
.mb-prog .pt { font-size: 10px; font-weight: 700; color: #334155; margin-bottom: 6px; display: flex; align-items: center; gap: 6px; }
.mb-prog .pt i {
  width: 6px; height: 6px; border-radius: 50%;
  background: #3b82f6;
  animation: mbPulse 1.1s ease-in-out infinite;
}
@keyframes mbPulse { 0%, 100% { box-shadow: 0 0 0 0 rgba(59, 130, 246, 0.4); } 50% { box-shadow: 0 0 0 4px rgba(59, 130, 246, 0.1); } }
.mb-prog .prow {
  display: flex;
  align-items: center;
  gap: 7px;
  font-size: 10.5px;
  color: #475569;
  padding: 3px 0;
  opacity: 0;
  transform: translateX(-6px);
  transition: opacity 0.35s ease, transform 0.35s ease;
}
.mb-prog .prow.on { opacity: 1; transform: none; }
.mb-prog .prow .ck {
  width: 12px; height: 12px;
  border-radius: 50%;
  border: 1.5px solid #cbd5e1;
  font-size: 7px;
  color: transparent;
  display: grid; place-items: center;
  transition: all 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
}
.mb-prog .prow.ok .ck { background: #10b981; border-color: #10b981; color: #fff; }
.mb-prog .prow.ok { color: #059669; }

/* 预览缩略卡 */
.mb-thumb {
  align-self: flex-start;
  width: 88%;
  background: #fff;
  border: 1px solid #eef2f7;
  border-radius: 12px;
  overflow: hidden;
  opacity: 0;
  transform: translateY(12px) scale(0.97);
  transition: opacity 0.5s ease, transform 0.5s cubic-bezier(0.16, 1, 0.3, 1);
}
.mb-thumb.on { opacity: 1; transform: none; }
.mb-thumb .th {
  display: flex; align-items: center; gap: 6px;
  font-size: 10px;
  font-weight: 700;
  color: #334155;
  padding: 7px 11px;
  border-bottom: 1px solid #f1f5f9;
}
.mb-thumb .th .sp { flex: 1; }
.mb-thumb .th .lv { font-size: 8px; color: #b45309; background: rgba(245, 158, 11, 0.12); border-radius: 999px; padding: 1px 8px; }
.mb-thumb .trow {
  display: flex; align-items: center; gap: 7px;
  padding: 6px 11px;
  border-bottom: 1px solid #f8fafc;
  opacity: 0;
  transform: translateY(6px);
  transition: opacity 0.35s ease, transform 0.35s ease;
}
.mb-thumb .trow.on { opacity: 1; transform: none; }
.mb-thumb .trow:last-child { border-bottom: none; }
.mb-thumb .trow i { width: 14px; height: 14px; border-radius: 5px; flex: 0 0 14px; }
.mb-thumb .trow:nth-child(odd) i { background: linear-gradient(135deg, rgba(59, 130, 246, 0.7), rgba(37, 99, 235, 0.7)); }
.mb-thumb .trow:nth-child(even) i { background: linear-gradient(135deg, rgba(139, 92, 246, 0.7), rgba(109, 40, 217, 0.7)); }
.mb-thumb .trow b { font-size: 10.5px; color: #334155; font-weight: 600; flex: 1; }
.mb-thumb .trow s { text-decoration: none; font-size: 9px; color: #94a3b8; }

/* 输入栏 + 语音键 */
.mb-input {
  flex: 0 0 54px;
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 0 12px 12px;
  background: linear-gradient(180deg, rgba(246, 248, 251, 0), #f6f8fb 40%);
}
.mb-input .box {
  flex: 1;
  font-size: 11px;
  color: #94a3b8;
  background: #fff;
  border: 1px solid #e2e8f0;
  border-radius: 999px;
  padding: 8px 14px;
}
.mb-mic {
  width: 38px;
  height: 38px;
  border-radius: 50%;
  background: #3b82f6;
  color: #fff;
  font-size: 15px;
  display: grid;
  place-items: center;
  box-shadow: 0 4px 16px rgba(59, 130, 246, 0.4);
  position: relative;
  flex: 0 0 38px;
  transition: background 0.3s ease;
}
.mb-mic.rec { background: #ef4444; box-shadow: 0 4px 20px rgba(239, 68, 68, 0.45); }
.mb-wave {
  position: absolute;
  inset: -12px;
  border-radius: 50%;
  border: 2px solid rgba(239, 68, 68, 0.5);
  opacity: 0;
  pointer-events: none;
}
.mb-mic.rec .mb-wave { animation: mbRipple 1.1s ease-out infinite; }
@keyframes mbRipple {
  0% { transform: scale(0.8); opacity: 0.9; }
  100% { transform: scale(1.5); opacity: 0; }
}

/* Act2 工作台 */
.mb-home { flex: 1; padding: 13px 13px 0; overflow: hidden; }
.mb-greet { font-size: 16px; font-weight: 700; color: #1f2937; opacity: 0; transform: translateY(8px); transition: all 0.45s ease; }
.mb-greet.on { opacity: 1; transform: none; }
.mb-greet small { display: block; font-size: 10px; font-weight: 400; color: #94a3b8; margin-top: 2px; }
.mb-search {
  margin-top: 10px;
  font-size: 11px;
  color: #94a3b8;
  background: #fff;
  border: 1px solid #e8ecf3;
  border-radius: 10px;
  padding: 8px 13px;
  opacity: 0;
  transform: translateY(8px);
  transition: all 0.45s ease 0.08s;
}
.mb-search.on { opacity: 1; transform: none; }
.mb-cards { margin-top: 12px; display: grid; grid-template-columns: 1fr 1fr; gap: 9px; }
.mb-card {
  background: #fff;
  border: 1px solid #eef2f7;
  border-radius: 12px;
  padding: 10px 11px;
  opacity: 0;
  transform: translateY(10px);
  transition: opacity 0.45s ease, transform 0.45s cubic-bezier(0.16, 1, 0.3, 1);
}
.mb-card.on { opacity: 1; transform: none; }
.mb-card .ci { font-size: 15px; margin-bottom: 6px; }
.mb-card .cn { font-size: 11.5px; font-weight: 600; color: #1f2937; }
.mb-card .cb { margin-top: 5px; }
.mb-badge {
  font-size: 8px;
  font-weight: 700;
  padding: 1.5px 8px;
  border-radius: 999px;
  letter-spacing: 0.04em;
}
.mb-badge.pub { background: rgba(16, 185, 129, 0.12); color: #059669; }
.mb-badge.test { background: rgba(245, 158, 11, 0.14); color: #b45309; }
.mb-badge.draft { background: #f1f5f9; color: #94a3b8; }
.mb-sess {
  margin-top: 10px;
  background: #fff;
  border: 1px solid #eef2f7;
  border-radius: 12px;
  padding: 9px 12px;
  display: flex;
  align-items: center;
  gap: 8px;
  opacity: 0;
  transform: translateY(10px);
  transition: all 0.45s ease 0.15s;
}
.mb-sess.on { opacity: 1; transform: none; }
.mb-sess .si {
  width: 26px; height: 26px;
  border-radius: 8px;
  background: rgba(59, 130, 246, 0.08);
  color: #3b82f6;
  font-size: 12px;
  display: grid; place-items: center;
  flex: 0 0 26px;
}
.mb-sess .sm { flex: 1; min-width: 0; }
.mb-sess .sm b { display: block; font-size: 11px; color: #1f2937; font-weight: 600; }
.mb-sess .sm s { text-decoration: none; font-size: 9px; color: #94a3b8; }
.mb-sess .go { color: #cbd5e1; font-size: 12px; }

/* Act3 预览视图 */
.mb-preview { flex: 1; padding: 11px 12px 0; display: flex; flex-direction: column; overflow: hidden; }
.mb-seg {
  display: flex;
  background: #eef2f7;
  border-radius: 9px;
  padding: 2.5px;
  gap: 2px;
  margin-bottom: 10px;
}
.mb-seg span {
  flex: 1;
  text-align: center;
  font-size: 10.5px;
  padding: 5px 0;
  border-radius: 7px;
  color: #64748b;
  transition: all 0.35s ease;
}
.mb-seg span.active { background: #fff; color: #3b82f6; font-weight: 600; box-shadow: 0 1px 4px rgba(15, 23, 42, 0.12); }
.mb-list { background: #fff; border: 1px solid #eef2f7; border-radius: 12px; overflow: hidden; }
.mb-lrow {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8.5px 12px;
  border-bottom: 1px solid #f5f7fb;
  opacity: 0;
  transform: translateY(7px);
  transition: opacity 0.4s ease, transform 0.4s ease;
}
.mb-lrow.on { opacity: 1; transform: none; }
.mb-lrow i { width: 20px; height: 20px; border-radius: 7px; flex: 0 0 20px; }
.mb-lrow:nth-child(odd) i { background: linear-gradient(135deg, rgba(59, 130, 246, 0.75), rgba(37, 99, 235, 0.75)); }
.mb-lrow:nth-child(even) i { background: linear-gradient(135deg, rgba(139, 92, 246, 0.75), rgba(109, 40, 217, 0.75)); }
.mb-lrow b { font-size: 11.5px; color: #1f2937; font-weight: 600; flex: 1; }
.mb-lrow s { text-decoration: none; font-size: 9px; color: #94a3b8; }
.mb-lrow .st { font-size: 8.5px; padding: 1px 8px; border-radius: 999px; background: rgba(16, 185, 129, 0.1); color: #059669; }
.mb-wide-note {
  margin-top: 9px;
  font-size: 10px;
  color: #3b82f6;
  background: rgba(59, 130, 246, 0.06);
  border: 1px dashed rgba(59, 130, 246, 0.35);
  border-radius: 9px;
  padding: 6px 11px;
  text-align: center;
  opacity: 0;
  transform: translateY(6px);
  transition: all 0.45s ease;
}
.mb-wide-note.on { opacity: 1; transform: none; }

/* 手机框宽度切换（预览模式下屏幕加宽） */
.mb-phone-wrap.wide .mb-phone { width: 384px; transition: width 0.6s cubic-bezier(0.16, 1, 0.3, 1); }
.mb-phone { transition: width 0.6s cubic-bezier(0.16, 1, 0.3, 1); }

/* Act4 PC 窗（左侧滑入） */
.mb-pc {
  position: absolute;
  left: 64px;
  top: 168px;
  width: 452px;
  border-radius: 16px;
  border: 1px solid rgba(140, 170, 220, 0.2);
  background: #f6f8fb;
  box-shadow: 0 34px 90px rgba(0, 0, 0, 0.55);
  overflow: hidden;
  color: #1f2937;
  opacity: 0;
  transform: translateX(-70px);
  transition: opacity 0.7s ease, transform 0.7s cubic-bezier(0.16, 1, 0.3, 1);
  z-index: 3;
}
.mb-pc.on { opacity: 1; transform: none; }
.mb-pc .pbar {
  flex: 0 0 34px;
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 0 12px;
  background: #fff;
  border-bottom: 1px solid #e8ecf3;
  font-size: 11px;
  font-weight: 700;
  color: #334155;
}
.mb-pc .pbar i { width: 7px; height: 7px; border-radius: 50%; background: #e2e8f0; }
.mb-pc .pbar i:first-child { background: #fda4af; }
.mb-pc .pbar i:nth-child(2) { background: #fcd34d; }
.mb-pc .pbar i:nth-child(3) { background: #6ee7b7; }
.mb-pc .pbar .sp { flex: 1; }
.mb-pc .pbar .cnt { font-size: 9px; font-weight: 400; color: #94a3b8; }
.mb-pc .pbody { padding: 11px 13px; display: flex; flex-direction: column; gap: 8px; }
.mb-pc .pmsg { max-width: 88%; font-size: 10.5px; line-height: 1.55; border-radius: 10px; padding: 6px 10px; opacity: 0; transform: translateY(8px); transition: all 0.4s ease; }
.mb-pc .pmsg.on { opacity: 1; transform: none; }
.mb-pc .pmsg.u { align-self: flex-end; background: #3b82f6; color: #fff; }
.mb-pc .pmsg.a { align-self: flex-start; background: #fff; border: 1px solid #eef2f7; color: #475569; }
.mb-pc .pmsg.a b { color: #3b82f6; }
.mb-pc .ptool {
  align-self: flex-start;
  display: flex;
  align-items: center;
  gap: 7px;
  font-size: 9.5px;
  color: #475569;
  background: #fff;
  border: 1px solid #eef2f7;
  border-radius: 8px;
  padding: 5px 10px;
  opacity: 0;
  transform: translateY(8px);
  transition: all 0.4s ease;
}
.mb-pc .ptool.on { opacity: 1; transform: none; }
.mb-pc .ptool .spin { width: 9px; height: 9px; border-radius: 50%; border: 1.5px solid #c7d7f5; border-top-color: #3b82f6; animation: mbSpin 0.9s linear infinite; }
@keyframes mbSpin { to { transform: rotate(360deg); } }
.mb-pc .ptool.ok .spin { border: none; background: #10b981; animation: none; width: 9px; height: 9px; position: relative; }
.mb-pc .ptool.ok .spin::after { content: "✓"; position: absolute; inset: 0; color: #fff; font-size: 6.5px; font-weight: 800; display: grid; place-items: center; }

/* 同步胶囊 */
.mb-sync {
  position: absolute;
  left: 452px;
  top: 322px;
  z-index: 7;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.12em;
  color: var(--ink-cyan);
  border: 1px solid rgba(52, 224, 232, 0.45);
  background: rgba(5, 8, 15, 0.92);
  border-radius: 999px;
  padding: 7px 14px;
  opacity: 0;
  transform: scale(0.9);
  transition: opacity 0.5s ease, transform 0.5s cubic-bezier(0.34, 1.56, 0.64, 1);
}
.mb-sync.on { opacity: 1; transform: none; animation: mbSyncGlow 2.4s ease-in-out infinite; }
@keyframes mbSyncGlow {
  0%, 100% { box-shadow: 0 0 0 0 rgba(52, 224, 232, 0.3); }
  50% { box-shadow: 0 0 22px 4px rgba(52, 224, 232, 0.2); }
}

/* 右侧浮动特性签 */
.mb-float {
  position: absolute;
  left: 906px;
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 11px;
  color: var(--text-mid);
  background: rgba(16, 30, 56, 0.6);
  border: 1px solid rgba(140, 170, 220, 0.18);
  backdrop-filter: blur(8px);
  border-radius: 999px;
  padding: 8px 16px;
  opacity: 0;
  transform: translateX(18px);
  transition: opacity 0.6s ease, transform 0.6s cubic-bezier(0.16, 1, 0.3, 1);
  z-index: 2;
}
.mb-float.on { opacity: 1; transform: none; }
.mb-float .fg { font-size: 13px; }
.mb-float.f1 { top: 130px; }
.mb-float.f2 { top: 330px; transition-delay: 0.12s; }
.mb-float.f3 { top: 530px; transition-delay: 0.24s; }

/* 发布成功屏内 toast */
.mb-live {
  position: absolute;
  left: 50%;
  bottom: 66px;
  transform: translate(-50%, 10px);
  display: flex;
  align-items: center;
  gap: 7px;
  font-size: 11px;
  font-weight: 600;
  color: #fff;
  background: rgba(5, 31, 24, 0.9);
  border-radius: 999px;
  padding: 8px 16px;
  opacity: 0;
  transition: opacity 0.45s ease, transform 0.45s ease;
  z-index: 15;
}
.mb-live.on { opacity: 1; transform: translate(-50%, 0); }
.mb-live i { width: 7px; height: 7px; border-radius: 50%; background: #10b981; box-shadow: 0 0 0 3px rgba(16, 185, 129, 0.2); }

/* ---------- 字幕 / 水印 / 结尾卡（与总览视频同源） ---------- */

.mb-caption {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 7.5%;
  text-align: center;
  z-index: 40;
  font-size: 30px;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: #eef3fb;
  text-shadow: 0 2px 30px rgba(5, 8, 15, 0.95), 0 0 60px rgba(61, 139, 255, 0.35);
  opacity: 0;
  transform: translateY(14px);
  transition: opacity 0.5s ease, transform 0.5s cubic-bezier(0.16, 1, 0.3, 1);
  pointer-events: none;
}
.mb-caption.on { opacity: 1; transform: none; }

.mb-caption-veil {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 26%;
  background: linear-gradient(180deg, transparent, rgba(5, 8, 15, 0.88));
  opacity: 0;
  transition: opacity 0.8s ease;
  pointer-events: none;
  z-index: 35;
}
.mb-caption-veil.on { opacity: 1; }

.mb-endcard {
  position: absolute;
  inset: 0;
  z-index: 50;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 26px;
  background: radial-gradient(1100px 560px at 50% 42%, rgba(11, 23, 48, 0.92), rgba(5, 8, 15, 0.985) 78%);
  opacity: 0;
  transition: opacity 1s ease;
  pointer-events: none;
}
.mb-endcard.on { opacity: 1; }
.mb-endcard .logo-wrap {
  width: 132px;
  height: 132px;
  border-radius: 32px;
  display: grid;
  place-items: center;
  transform: scale(0.8);
  opacity: 0;
  transition: transform 0.9s cubic-bezier(0.34, 1.56, 0.64, 1) 0.25s, opacity 0.9s ease 0.25s;
  box-shadow: 0 30px 90px rgba(52, 224, 232, 0.22), 0 0 120px rgba(139, 92, 246, 0.14);
}
.mb-endcard.on .logo-wrap { transform: scale(1); opacity: 1; }
.mb-endcard .logo-wrap img { width: 108px; height: 108px; }
.mb-endcard .ename {
  font-family: var(--font-display);
  font-size: 46px;
  letter-spacing: 0.06em;
  opacity: 0;
  transform: translateY(16px);
  transition: all 0.8s ease 0.5s;
}
.mb-endcard.on .ename { opacity: 1; transform: none; }
.mb-endcard .eslogan {
  font-size: 21px;
  font-weight: 600;
  letter-spacing: 0.28em;
  color: #a9b7d0;
  opacity: 0;
  transform: translateY(16px);
  transition: all 0.8s ease 0.75s;
}
.mb-endcard.on .eslogan { opacity: 1; transform: none; }
.mb-endcard .ecta {
  font-size: 14.5px;
  letter-spacing: 0.3em;
  color: #6b7a96;
  padding: 10px 30px;
  border: 1px solid rgba(140, 170, 220, 0.14);
  border-radius: 999px;
  opacity: 0;
  transition: all 0.8s ease 1s;
}
.mb-endcard.on .ecta { opacity: 1; }

.mb-watermark {
  position: absolute;
  top: 44px;
  left: 44px;
  z-index: 45;
  display: flex;
  align-items: center;
  gap: 9px;
  padding: 7px 15px;
  border-radius: 999px;
  background: rgba(5, 10, 20, 0.78);
  border: 1px solid rgba(140, 170, 220, 0.2);
  backdrop-filter: blur(8px);
  box-shadow: 0 6px 22px rgba(0, 0, 0, 0.35);
  opacity: 0;
  transition: opacity 1s ease 0.4s;
}
.mb-watermark.on { opacity: 1; }
.mb-watermark img { width: 22px; height: 22px; }
.mb-watermark .wm-name {
  font-family: var(--font-display);
  font-size: 15px;
  letter-spacing: 0.08em;
  color: rgba(238, 243, 251, 0.95);
}

/* 自适应缩放容器 */
.mb-fit { position: relative; width: 100%; }