@font-face {
  font-family: "Cinzel";
  font-style: normal;
  font-weight: 400 700;
  font-display: swap;
  src: url("../assets/8vIJ7ww63mVu7gt79mT7.woff2") format("woff2");
}

/* 手势加载提示动画 */
@keyframes pulse {
  0%, 100% { opacity: 1; transform: translateX(-50%) scale(1); }
  50% { opacity: 0.7; transform: translateX(-50%) scale(1.05); }
}

body {
  margin: 0;
  overflow: hidden;
  background-color: #000000;
  font-family: "Times New Roman", serif;
  touch-action: none;
}

#canvas-container {
  width: 100vw;
  height: 100vh;
  position: absolute;
  top: 0;
  left: 0;
  z-index: 1;
}

#ui-layer {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 10;
  pointer-events: none;
}

/* UI 内容容器 (标题等) */
#ui-content {
  width: 100%;
  height: 100%;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: opacity 0.8s ease;
  /* 缓慢淡入淡出 */
}

/* 隐藏状态：透明度为0 */
.ui-invisible {
  opacity: 0 !important;
  pointer-events: none;
}

h1 {
  pointer-events: auto;
  color: #fceea7;
  font-size: 56px;
  margin-top: 40px;
  text-align: center;
  text-shadow: 0 0 50px rgba(252, 238, 167, 0.6);
  background: linear-gradient(to bottom, #fff, #eebb66);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  font-family: "Cinzel", "Microsoft YaHei", serif;
  width: 100%;
  transition: opacity 0.5s;
}

/* --- 左下角菜单系统 --- */
.menu-container {
  position: absolute;
  bottom: 30px;
  left: 30px;
  pointer-events: auto;
  display: flex;
  flex-direction: column-reverse;
  align-items: flex-start;
  gap: 15px;
}

/* 主菜单按钮 */
.main-menu-btn {
  background: rgba(212, 175, 55, 0.2);
  border: 1px solid rgba(212, 175, 55, 0.6);
  color: #d4af37;
  width: 50px;
  height: 50px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
  cursor: pointer;
  backdrop-filter: blur(8px);
  transition: all 0.5s cubic-bezier(0.4, 0, 0.2, 1);
  z-index: 20;
  box-shadow: 0 0 15px rgba(0, 0, 0, 0.5);
}

.main-menu-btn.active {
  background: rgba(212, 175, 55, 0.8);
  color: #000;
  transform: rotate(45deg);
}

/* === 沉浸式极小模式 === */
/* 当界面隐藏时，按钮变成一个小光点，但点击范围不变 */
.main-menu-btn.tiny-mode {
  background: transparent;
  border-color: transparent;
  box-shadow: none;
  color: transparent;
  /* 隐藏齿轮图标 */
  transform: scale(1);
  /* 保持点击范围大小 */
}

/* 用伪元素画一个小点 */
.main-menu-btn.tiny-mode::after {
  content: "";
  position: absolute;
  width: 6px;
  height: 6px;
  background: rgba(255, 255, 255, 0.6);
  border-radius: 50%;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  box-shadow: 0 0 8px rgba(255, 255, 255, 0.9);
  animation: breathe 3s infinite ease-in-out;
}

@keyframes breathe {
  0%,
  100% {
    opacity: 0.3;
    transform: translate(-50%, -50%) scale(1);
  }

  50% {
    opacity: 1;
    transform: translate(-50%, -50%) scale(1.5);
  }
}

/* 二级菜单列表 */
.menu-items {
  display: flex;
  flex-direction: column;
  gap: 10px;
  opacity: 0;
  transform: translateY(20px) scale(0.9);
  pointer-events: none;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  margin-bottom: 5px;
  transform-origin: bottom left;
}

.menu-items.show {
  opacity: 1;
  transform: translateY(0) scale(1);
  pointer-events: auto;
}

/* 通用按钮样式 */
.btn-style {
  background: rgba(10, 10, 10, 0.75);
  border: 1px solid rgba(212, 175, 55, 0.3);
  color: #d4af37;
  padding: 10px 18px;
  cursor: pointer;
  font-size: 13px;
  transition: all 0.2s;
  backdrop-filter: blur(10px);
  font-family: "Microsoft YaHei", sans-serif;
  border-radius: 20px;
  display: flex;
  align-items: center;
  gap: 8px;
  text-decoration: none;
  width: max-content;
  white-space: nowrap;
}

.btn-style:hover {
  background: rgba(212, 175, 55, 0.2);
  color: #fff;
  transform: translateX(5px);
}

.btn-style.active {
  background: rgba(212, 175, 55, 0.5);
  color: #fff;
  border-color: #fff;
}

.btn-danger {
  border-color: rgba(255, 80, 80, 0.5);
  color: #ff8888;
}

.btn-danger:hover {
  background: rgba(255, 50, 50, 0.3);
  color: #fff;
}

input[type="file"] {
  display: none;
}

#loader {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(
    135deg,
    #1a0a0a 0%,
    #0d2818 30%,
    #2d0a0a 70%,
    #0a1a0f 100%
  );
  z-index: 100;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  transition: opacity 0.8s ease;
}

#loader.loading .enter-content {
  display: none;
}

#loader.loading .loading-content {
  display: flex;
  flex-direction: column;
  align-items: center;
}

#loader .loading-content {
  display: none;
}

.enter-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 30px;
}

.enter-title {
  font-size: 48px;
  color: #fceea7;
  text-shadow: 0 0 30px rgba(252, 238, 167, 0.5);
  background: linear-gradient(to bottom, #fff, #eebb66);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  font-family: "Cinzel", "Times New Roman", serif;
  margin-bottom: 20px;
}

.enter-btn {
  background: linear-gradient(
    135deg,
    rgba(212, 175, 55, 0.3),
    rgba(212, 175, 55, 0.1)
  );
  border: 2px solid rgba(212, 175, 55, 0.6);
  color: #d4af37;
  padding: 18px 60px;
  font-size: 20px;
  border-radius: 50px;
  cursor: pointer;
  font-family: "Microsoft YaHei", sans-serif;
  transition: all 0.3s ease;
  backdrop-filter: blur(10px);
  box-shadow: 0 0 30px rgba(212, 175, 55, 0.2);
}

.enter-btn:hover {
  background: linear-gradient(
    135deg,
    rgba(212, 175, 55, 0.5),
    rgba(212, 175, 55, 0.3)
  );
  box-shadow: 0 0 50px rgba(212, 175, 55, 0.4);
  transform: scale(1.05);
}

.spinner {
  width: 40px;
  height: 40px;
  border: 1px solid rgba(212, 175, 55, 0.2);
  border-top: 1px solid #d4af37;
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

.loader-text {
  color: #d4af37;
  margin-top: 20px;
  font-family: "Microsoft YaHei", sans-serif;
  font-size: 14px;
}

#webcam-wrapper {
  position: absolute;
  bottom: 20px;
  right: 20px;
  width: 120px;
  height: 90px;
  border: 1px solid rgba(255, 255, 255, 0.3);
  overflow: hidden;
  opacity: 1;
  pointer-events: none;
  z-index: 5;
  border-radius: 8px;
  transition: opacity 0.5s;
  background: #000;
}

#toast {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  background: rgba(0, 0, 0, 0.8);
  color: #fff;
  padding: 15px 30px;
  border-radius: 8px;
  z-index: 200;
  display: none;
  text-align: center;
  border: 1px solid #d4af37;
  font-family: "Microsoft YaHei", sans-serif;
  pointer-events: none;
  line-height: 1.6;
}

#gesture-status {
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  background: rgba(0, 0, 0, 0.6);
  color: #0f0;
  font-size: 10px;
  text-align: center;
  padding: 2px 0;
  font-family: sans-serif;
}

/* 图片管理面板 */
.photo-manager {
  position: absolute;
  bottom: 100px;
  left: 30px;
  max-width: 320px;
  max-height: 300px;
  background: rgba(10, 10, 10, 0.9);
  border: 1px solid rgba(212, 175, 55, 0.3);
  border-radius: 12px;
  backdrop-filter: blur(10px);
  padding: 12px;
  pointer-events: auto;
  opacity: 0;
  transform: translateY(20px) scale(0.9);
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  z-index: 15;
  display: none;
}

.photo-manager.show {
  opacity: 1;
  transform: translateY(0) scale(1);
  display: block;
}

.photo-manager-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 10px;
  padding-bottom: 8px;
  border-bottom: 1px solid rgba(212, 175, 55, 0.2);
}

.photo-manager-title {
  color: #d4af37;
  font-size: 14px;
  font-family: "Microsoft YaHei", sans-serif;
}

.photo-manager-close {
  background: none;
  border: none;
  color: #888;
  font-size: 18px;
  cursor: pointer;
  padding: 0 5px;
  transition: color 0.2s;
}

.photo-manager-close:hover {
  color: #fff;
}

.photo-manager-actions {
  display: flex;
  align-items: center;
  gap: 8px;
}

.photo-clear-btn {
  background: none;
  border: none;
  color: #ff6666;
  font-size: 16px;
  cursor: pointer;
  padding: 2px 6px;
  transition: all 0.2s;
  border-radius: 4px;
}

.photo-clear-btn:hover {
  background: rgba(255, 50, 50, 0.2);
  color: #fff;
}

.photo-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 8px;
  max-height: 200px;
  overflow-y: auto;
  padding-right: 5px;
}

.photo-grid::-webkit-scrollbar {
  width: 4px;
}

.photo-grid::-webkit-scrollbar-track {
  background: rgba(255, 255, 255, 0.1);
  border-radius: 2px;
}

.photo-grid::-webkit-scrollbar-thumb {
  background: rgba(212, 175, 55, 0.5);
  border-radius: 2px;
}

.photo-item {
  position: relative;
  aspect-ratio: 1;
  border-radius: 6px;
  overflow: hidden;
  border: 1px solid rgba(212, 175, 55, 0.6);
  transition: all 0.2s;
}

.photo-item:hover {
  border-color: rgba(212, 175, 55, 0.6);
  transform: scale(1.05);
}

.photo-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  background: rgba(212, 175, 55, 0.6);
  border: 1px solid rgba(212, 175, 55, 0.6);
}

.photo-item-delete {
  position: absolute;
  top: 4px;
  right: 4px;
  width: 20px;
  height: 20px;
  background: rgba(255, 50, 50, 0.8);
  border: none;
  border-radius: 50%;
  color: #fff;
  font-size: 12px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: opacity 0.2s;
}

.photo-item:hover .photo-item-delete {
  opacity: 1;
}

.photo-add-btn {
  aspect-ratio: 1;
  border: 2px dashed rgba(212, 175, 55, 0.4);
  border-radius: 6px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all 0.2s;
  background: rgba(212, 175, 55, 0.05);
}

.photo-add-btn:hover {
  border-color: rgba(212, 175, 55, 0.8);
  background: rgba(212, 175, 55, 0.1);
}

.photo-add-btn span {
  color: #d4af37;
  font-size: 24px;
}

.photo-add-btn small {
  color: #888;
  font-size: 10px;
  margin-top: 2px;
}

.photo-empty {
  grid-column: 1 / -1;
  text-align: center;
  padding: 20px;
  color: #888;
  font-size: 12px;
}

.photo-count {
  color: #888;
  font-size: 12px;
}

/* 通用面板拖动和缩放样式 */
.panel-draggable {
  cursor: default;
}

.panel-draggable .panel-header {
  cursor: move;
  user-select: none;
}

.panel-draggable.dragging {
  transition: none !important;
  opacity: 0.95;
}

.panel-actions {
  display: flex;
  align-items: center;
  gap: 4px;
}

.panel-action-btn {
  background: none;
  border: none;
  color: #888;
  font-size: 14px;
  cursor: pointer;
  padding: 2px 6px;
  transition: all 0.2s;
  border-radius: 4px;
}

.panel-action-btn:hover {
  color: #d4af37;
  background: rgba(212, 175, 55, 0.1);
}

.panel-maximized {
  position: fixed !important;
  top: 50% !important;
  left: 50% !important;
  bottom: auto !important;
  transform: translate(-50%, -50%) !important;
  max-width: 90vw !important;
  max-height: 80vh !important;
  width: 500px !important;
  z-index: 100 !important;
}

.panel-maximized .photo-grid,
.panel-maximized .music-content {
  max-height: 60vh !important;
}

.panel-resize-handle {
  position: absolute;
  bottom: 0;
  right: 0;
  width: 15px;
  height: 15px;
  cursor: se-resize;
  opacity: 0.3;
  transition: opacity 0.2s;
}

.panel-resize-handle::before {
  content: "";
  position: absolute;
  bottom: 4px;
  right: 4px;
  width: 8px;
  height: 8px;
  border-right: 2px solid #d4af37;
  border-bottom: 2px solid #d4af37;
}

.panel-resize-handle:hover {
  opacity: 1;
}

/* 音乐管理面板 */
.music-manager {
  position: absolute;
  bottom: 100px;
  left: 30px;
  max-width: 320px;
  background: rgba(10, 10, 10, 0.9);
  border: 1px solid rgba(212, 175, 55, 0.3);
  border-radius: 12px;
  backdrop-filter: blur(10px);
  padding: 12px;
  pointer-events: auto;
  opacity: 0;
  transform: translateY(20px) scale(0.9);
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  z-index: 15;
  display: none;
}

.music-manager.show {
  opacity: 1;
  transform: translateY(0) scale(1);
  display: block;
}

.music-manager-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 10px;
  padding-bottom: 8px;
  border-bottom: 1px solid rgba(212, 175, 55, 0.2);
}

.music-manager-title {
  color: #d4af37;
  font-size: 14px;
  font-family: "Microsoft YaHei", sans-serif;
}

.music-manager-close {
  background: none;
  border: none;
  color: #888;
  font-size: 18px;
  cursor: pointer;
  padding: 0 5px;
  transition: color 0.2s;
}

.music-manager-close:hover {
  color: #fff;
}

.music-content {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.music-current {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px;
  background: rgba(212, 175, 55, 0.1);
  border-radius: 8px;
  border: 1px solid rgba(212, 175, 55, 0.2);
}

.music-icon {
  font-size: 24px;
}

.music-info {
  flex: 1;
  overflow: hidden;
}

.music-name {
  color: #d4af37;
  font-size: 12px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  font-family: "Microsoft YaHei", sans-serif;
}

.music-status {
  color: #888;
  font-size: 10px;
  margin-top: 2px;
}

.music-actions {
  display: flex;
  gap: 8px;
}

.music-btn {
  flex: 1;
  padding: 10px;
  background: rgba(212, 175, 55, 0.1);
  border: 1px solid rgba(212, 175, 55, 0.3);
  border-radius: 8px;
  color: #d4af37;
  font-size: 12px;
  cursor: pointer;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  transition: all 0.2s;
  font-family: "Microsoft YaHei", sans-serif;
}

.music-btn:hover {
  background: rgba(212, 175, 55, 0.2);
  color: #fff;
}

.music-btn.active {
  background: rgba(212, 175, 55, 0.3);
  border-color: rgba(212, 175, 55, 0.6);
}

.music-btn-icon {
  font-size: 20px;
}

.music-btn-danger {
  border-color: rgba(255, 100, 100, 0.3);
  color: #ff6666;
}

.music-btn-danger:hover {
  background: rgba(255, 50, 50, 0.2);
  color: #fff;
}

.music-upload-label {
  cursor: pointer;
}

.music-upload-label input {
  display: none;
}

/* 背景设置面板 */
.bg-manager {
  position: absolute;
  bottom: 100px;
  left: 30px;
  width: 280px;
  background: rgba(10, 10, 10, 0.9);
  border: 1px solid rgba(212, 175, 55, 0.3);
  border-radius: 12px;
  backdrop-filter: blur(10px);
  padding: 15px;
  pointer-events: auto;
  opacity: 0;
  transform: translateY(20px) scale(0.9);
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  z-index: 15;
  display: none;
}

.bg-manager.show {
  opacity: 1;
  transform: translateY(0) scale(1);
  display: block;
}

.bg-manager-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 12px;
  padding-bottom: 8px;
  border-bottom: 1px solid rgba(212, 175, 55, 0.2);
}

.bg-manager-title {
  color: #d4af37;
  font-size: 14px;
  font-family: "Microsoft YaHei", sans-serif;
}

.bg-manager-close {
  background: none;
  border: none;
  color: #888;
  font-size: 18px;
  cursor: pointer;
  padding: 0 5px;
  transition: color 0.2s;
}

.bg-manager-close:hover {
  color: #fff;
}

.bg-content {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.bg-preview-container {
  width: 100%;
}

.bg-preview {
  width: 100%;
  height: 100px;
  background: #000;
  border: 1px solid rgba(212, 175, 55, 0.3);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  position: relative;
}

.bg-preview img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.bg-preview-text {
  color: #666;
  font-size: 12px;
  font-family: "Microsoft YaHei", sans-serif;
}

.bg-actions {
  display: flex;
  gap: 8px;
}

.bg-btn {
  flex: 1;
  padding: 10px;
  background: rgba(212, 175, 55, 0.1);
  border: 1px solid rgba(212, 175, 55, 0.3);
  border-radius: 8px;
  color: #d4af37;
  font-size: 12px;
  cursor: pointer;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  transition: all 0.2s;
  font-family: "Microsoft YaHei", sans-serif;
}

.bg-btn:hover {
  background: rgba(212, 175, 55, 0.2);
  color: #fff;
}

.bg-btn-icon {
  font-size: 20px;
}

.bg-btn-danger {
  border-color: rgba(255, 100, 100, 0.3);
  color: #ff6666;
}

.bg-btn-danger:hover {
  background: rgba(255, 50, 50, 0.2);
  color: #fff;
}

.bg-upload-label {
  cursor: pointer;
}

.bg-upload-label input {
  display: none;
}

/* 标题设置面板 */
.title-settings {
  position: absolute;
  bottom: 100px;
  left: 30px;
  width: 280px;
  background: rgba(10, 10, 10, 0.9);
  border: 1px solid rgba(212, 175, 55, 0.3);
  border-radius: 12px;
  backdrop-filter: blur(10px);
  padding: 15px;
  pointer-events: auto;
  opacity: 0;
  transform: translateY(20px) scale(0.9);
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  z-index: 15;
  display: none;
}

.title-settings.show {
  opacity: 1;
  transform: translateY(0) scale(1);
  display: block;
}

.title-settings-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 12px;
  padding-bottom: 8px;
  border-bottom: 1px solid rgba(212, 175, 55, 0.2);
}

.title-settings-title {
  color: #d4af37;
  font-size: 14px;
  font-family: "Microsoft YaHei", sans-serif;
}

.title-settings-close {
  background: none;
  border: none;
  color: #888;
  font-size: 18px;
  cursor: pointer;
  padding: 0 5px;
  transition: color 0.2s;
}

.title-settings-close:hover {
  color: #fff;
}

.title-input-group {
  margin-bottom: 12px;
}

.title-input-label {
  display: block;
  color: #888;
  font-size: 11px;
  margin-bottom: 6px;
  font-family: "Microsoft YaHei", sans-serif;
}

.title-input {
  width: 100%;
  padding: 10px 12px;
  background: rgba(0, 0, 0, 0.3);
  border: 1px solid rgba(212, 175, 55, 0.3);
  border-radius: 8px;
  color: #d4af37;
  font-size: 14px;
  font-family: "Microsoft YaHei", sans-serif;
  outline: none;
  transition: all 0.2s;
  box-sizing: border-box;
}

.title-input:focus {
  border-color: rgba(212, 175, 55, 0.6);
  background: rgba(0, 0, 0, 0.5);
}

.title-input::placeholder {
  color: #666;
}

/* 手势操作提示框 */
.instruction-box {
  position: absolute;
  top: 20%;
  right: 30px;
  width: 260px;
  background: rgba(10, 10, 10, 0.9);
  border: 1px solid rgba(212, 175, 55, 0.3);
  border-radius: 12px;
  backdrop-filter: blur(10px);
  padding: 15px;
  z-index: 100;
  color: #d4af37;
  font-family: "Microsoft YaHei", sans-serif;
  box-shadow: 0 0 20px rgba(0, 0, 0, 0.5);
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  opacity: 0;
  transform: translateX(20px);
  pointer-events: none;
}

.instruction-box.show {
  opacity: 1;
  transform: translateX(0);
  pointer-events: auto;
}

.instruction-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 15px;
  padding-bottom: 8px;
  border-bottom: 1px solid rgba(212, 175, 55, 0.2);
  font-size: 16px;
  font-weight: bold;
  cursor: move; /* 添加拖拽光标 */
  user-select: none; /* 防止选中文字 */
}

.instruction-close {
  background: none;
  border: none;
  color: #888;
  font-size: 18px;
  cursor: pointer;
  transition: color 0.2s;
}

.instruction-close:hover {
  color: #fff;
}

.instruction-content {
  display: flex;
  flex-direction: column;
  gap: 15px;
}

.instruction-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 8px;
  background: rgba(212, 175, 55, 0.05);
  border-radius: 8px;
}

.instruction-icon {
  font-size: 24px;
}

.instruction-text {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.instruction-text strong {
  color: #fceea7;
  font-size: 14px;
}

.instruction-text span {
  color: #aaa;
  font-size: 12px;
}

.title-buttons {
  display: flex;
  gap: 10px;
}

@media (max-width: 768px) {
  .instruction-box {
    top: 50%;
    left: 50%;
    right: auto;
    transform: translate(-50%, -50%) scale(0.9);
    width: 80%;
    max-width: 300px;
  }
  
  .instruction-box.show {
    opacity: 1;
    transform: translate(-50%, -50%) scale(1);
  }
}

.particle-settings {
  position: absolute;
  bottom: 100px;
  left: 30px;
  width: 280px;
  background: rgba(10, 10, 10, 0.9);
  border: 1px solid rgba(212, 175, 55, 0.3);
  border-radius: 12px;
  backdrop-filter: blur(10px);
  padding: 15px;
  pointer-events: auto;
  opacity: 0;
  transform: translateY(20px) scale(0.9);
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  z-index: 15;
  display: none;
}

.particle-settings.show {
  opacity: 1;
  transform: translateY(0) scale(1);
  display: block;
}

.particle-settings-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 15px;
  padding-bottom: 10px;
  border-bottom: 1px solid rgba(212, 175, 55, 0.2);
}

.particle-settings-title {
  color: #d4af37;
  font-size: 14px;
  font-family: "Microsoft YaHei", sans-serif;
}

.particle-settings-close {
  background: none;
  border: none;
  color: #888;
  font-size: 18px;
  cursor: pointer;
  padding: 0 5px;
  transition: color 0.2s;
}

.particle-settings-close:hover {
  color: #fff;
}

.slider-group {
  margin-bottom: 15px;
}

.slider-label {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 8px;
  color: #ccc;
  font-size: 12px;
  font-family: "Microsoft YaHei", sans-serif;
}

.slider-value {
  color: #d4af37;
  font-weight: bold;
}

.slider-input {
  width: 100%;
  height: 6px;
  border-radius: 3px;
  background: rgba(255, 255, 255, 0.1);
  outline: none;
  -webkit-appearance: none;
  appearance: none;
}

.slider-input::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: #d4af37;
  cursor: pointer;
  box-shadow: 0 0 10px rgba(212, 175, 55, 0.5);
  transition: transform 0.2s;
}

.slider-input::-webkit-slider-thumb:hover {
  transform: scale(1.2);
}

.slider-input::-moz-range-thumb {
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: #d4af37;
  cursor: pointer;
  border: none;
}

.apply-btn {
  width: 100%;
  padding: 10px;
  background: linear-gradient(
    135deg,
    rgba(212, 175, 55, 0.3),
    rgba(212, 175, 55, 0.1)
  );
  border: 1px solid rgba(212, 175, 55, 0.5);
  color: #d4af37;
  border-radius: 8px;
  cursor: pointer;
  font-family: "Microsoft YaHei", sans-serif;
  font-size: 13px;
  transition: all 0.2s;
  margin-top: 5px;
}

.apply-btn:hover {
  background: linear-gradient(
    135deg,
    rgba(212, 175, 55, 0.5),
    rgba(212, 175, 55, 0.3)
  );
  color: #fff;
}

.device-hint {
  color: #888;
  font-size: 11px;
  text-align: center;
  margin-bottom: 12px;
  font-family: "Microsoft YaHei", sans-serif;
}

@media screen and (max-width: 768px) {
  h1 {
    font-size: 36px;
    margin-top: 60px;
  }

  .menu-container {
    bottom: 20px;
    left: 20px;
  }

  #webcam-wrapper {
    bottom: 20px !important;
    right: 20px !important;
    width: 100px;
    height: 75px;
  }

  /* 手机端图片管理面板 */
  .photo-manager {
    left: 15px;
    right: 15px;
    bottom: 80px;
    max-width: none;
    max-height: 50vh;
  }

  .photo-grid {
    grid-template-columns: repeat(4, 1fr);
    gap: 6px;
    max-height: calc(50vh - 60px);
  }

  .photo-item-delete {
    opacity: 1;
    width: 18px;
    height: 18px;
    font-size: 10px;
  }

  /* 手机端 loader 进入页面样式 */
  .enter-title {
    font-size: 28px;
    margin-bottom: 15px;
  }

  .enter-btn {
    padding: 14px 40px;
    font-size: 16px;
  }

  .enter-content {
    gap: 20px;
    padding: 0 20px;
  }

  .loader-text {
    font-size: 12px;
  }

  /* 手机端音乐管理面板 */
  .music-manager {
    left: 15px;
    right: 15px;
    bottom: 80px;
    max-width: none;
  }

  /* 手机端标题设置面板 */
  .title-settings {
    left: 15px;
    right: 15px;
    bottom: 80px;
    width: auto;
  }

  .music-actions {
    flex-wrap: wrap;
  }

  .music-btn {
    min-width: calc(50% - 4px);
  }

  /* 手机端菜单按钮优化 */
  .btn-style {
    padding: 8px 14px;
    font-size: 12px;
  }

  .main-menu-btn {
    width: 45px;
    height: 45px;
    font-size: 20px;
  }

  /* 手机端粒子设置面板 */
  .particle-settings {
    left: 15px;
    right: 15px;
    bottom: 80px;
    width: auto;
  }

  /* 手机端背景设置面板 */
  .bg-manager {
    left: 15px;
    right: 15px;
    bottom: 80px;
    width: auto;
  }

  /* 手机端手机摄像头连接面板 */
  .phone-camera-panel {
    left: 10px;
    right: 10px;
    bottom: 70px;
    top: auto;
    width: auto;
    max-width: none;
    max-height: calc(100vh - 150px);
    padding: 10px;
    overflow-y: auto;
  }

  .phone-camera-panel .phone-camera-title {
    font-size: 13px;
  }

  .phone-camera-panel #qrcode-container {
    padding: 8px;
  }

  .phone-camera-panel #qrcode-container p {
    font-size: 11px !important;
    margin-top: 6px !important;
  }

  .phone-camera-panel #connection-status {
    font-size: 11px;
    padding: 6px;
  }

  .phone-camera-panel #reconnect-phone-btn,
  .phone-camera-panel #disconnect-phone-btn {
    padding: 6px 14px;
    font-size: 11px;
  }

  .phone-camera-panel .phone-camera-actions {
    margin-top: 8px;
    padding-top: 8px;
    gap: 6px;
  }

  /* 手机端二维码缩小 */
  .phone-camera-panel #qrcode {
    transform: scale(0.6);
    transform-origin: center;
    margin: -20px 0;
  }

  /* 手机端分享提示关闭按钮 */
  .share-mode-banner #close-banner-btn {
    padding: 1px 5px;
    font-size: 10px;
    min-width: 18px;
    min-height: 18px;
  }

  /* 手机端分享历史面板 */
  .share-history-panel {
    width: auto !important;
    left: 15px !important;
    right: 15px !important;
    max-height: 60vh;
    transform: translate(0, -50%) !important;
  }

  /* 手机端分享提示条优化 */
  .share-mode-banner {
    flex-wrap: wrap;
    padding: 8px 10px;
    gap: 8px;
  }

  .share-mode-banner span {
    font-size: 12px;
    text-align: center;
  }
}

/* 手机摄像头连接面板 */
.phone-camera-panel {
  position: absolute;
  bottom: 100px;
  left: 30px;
  width: 320px;
  background: rgba(10, 10, 10, 0.95);
  border: 1px solid rgba(212, 175, 55, 0.3);
  border-radius: 12px;
  backdrop-filter: blur(10px);
  padding: 15px;
  pointer-events: auto;
  opacity: 0;
  transform: translateY(20px) scale(0.9);
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  z-index: 20;
}

.phone-camera-panel.show {
  opacity: 1;
  transform: translateY(0) scale(1);
  display: block !important;
}

.phone-camera-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 12px;
  padding-bottom: 8px;
  border-bottom: 1px solid rgba(212, 175, 55, 0.2);
}

.phone-camera-title {
  color: #d4af37;
  font-size: 14px;
  font-family: "Microsoft YaHei", sans-serif;
}

.phone-camera-close {
  background: none;
  border: none;
  color: #888;
  font-size: 18px;
  cursor: pointer;
  padding: 0 5px;
  transition: color 0.2s;
}

.phone-camera-close:hover {
  color: #fff;
}

.phone-camera-content #qrcode img {
  border: 5px solid #fff;
  border-radius: 8px;
}

/* 重开连接按钮 */
/* 可复制URL样式 */
.copyable-url {
  cursor: pointer;
  transition: all 0.2s ease;
  padding: 6px 10px;
  border-radius: 6px;
  background: rgba(212, 175, 55, 0.1);
  border: 1px dashed rgba(212, 175, 55, 0.3);
}

.copyable-url:hover {
  background: rgba(212, 175, 55, 0.2);
  color: #d4af37 !important;
}

.copyable-url:active {
  transform: scale(0.98);
}

.copyable-url.copied {
  background: rgba(76, 175, 80, 0.2);
  border-color: rgba(76, 175, 80, 0.5);
  color: #4CAF50 !important;
}

.phone-camera-actions {
  display: flex;
  justify-content: center;
  margin-top: 15px;
  padding-top: 15px;
  border-top: 1px solid rgba(212, 175, 55, 0.2);
}

#reconnect-phone-btn {
  background: rgba(212, 175, 55, 0.2);
  border: 1px solid rgba(212, 175, 55, 0.6);
  color: #d4af37;
  padding: 10px 25px;
  border-radius: 8px;
  cursor: pointer;
  font-size: 14px;
  font-family: "Microsoft YaHei", sans-serif;
  transition: all 0.3s ease;
}

#reconnect-phone-btn:hover {
  background: rgba(212, 175, 55, 0.4);
  box-shadow: 0 0 15px rgba(212, 175, 55, 0.3);
}


#disconnect-phone-btn {
   background: rgba(212, 175, 55, 0.2);
  border: 1px solid rgba(212, 175, 55, 0.6);
  color: #fff;
  padding: 10px 25px;
  border-radius: 8px;
  cursor: pointer;
  font-size: 14px;
  font-family: "Microsoft YaHei", sans-serif;
  transition: all 0.3s ease;
}

#disconnect-phone-btn:hover {
  background: rgba(212, 175, 55, 0.4);
  box-shadow: 0 0 15px rgba(212, 175, 55, 0.3);
}

/* 更多功能下拉菜单 */
.more-functions-container,
.share-menu-container {
  position: relative;
  width: 100%;
}

.more-functions-menu {
  display: none;
  flex-direction: column;
  gap: 8px;
  margin-top: 8px;
  padding: 10px;
  background: rgba(20, 20, 20, 0.9);
  border: 1px solid rgba(212, 175, 55, 0.3);
  border-radius: 8px;
}

.more-functions-menu.show {
  display: flex;
}

.more-functions-menu .btn-style {
  margin: 0;
  font-size: 13px;
}

/* PC端图片管理面板优化 */
@media screen and (min-width: 769px) {
  .photo-manager {
    max-width: 450px;
    max-height: 400px;
  }

  .photo-grid {
    grid-template-columns: repeat(4, 1fr);
    gap: 10px;
    max-height: 300px;
  }

  .photo-add-btn {
    min-height: 90px;
  }

  .photo-add-btn span {
    font-size: 32px;
  }

  .photo-add-btn small {
    font-size: 12px;
  }
}

/* 分享历史面板 */
.share-history-panel {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 320px;
    height: 400px;
    background: rgba(20, 20, 20, 0.9);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 12px;
    display: none;
    flex-direction: column;
    z-index: 1000;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
    color: #fff;
}

.share-history-panel.show {
    display: flex;
}

.share-history-header {
    padding: 15px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    display: flex;
    justify-content: space-between;
    align-items: center;
    cursor: move;
}

.share-history-list {
    flex: 1;
    overflow-y: auto;
    padding: 10px;
}

.share-history-item {
    background: rgba(255, 255, 255, 0.05);
    border-radius: 8px;
    padding: 10px;
    margin-bottom: 10px;
    cursor: pointer;
    transition: all 0.3s ease;
    border: 1px solid transparent;
}

.share-history-item:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: rgba(212, 175, 55, 0.5);
}

.share-history-item.active {
    border-color: #d4af37;
    background: rgba(212, 175, 55, 0.1);
}

.share-item-title {
    font-size: 14px;
    font-weight: bold;
    color: #fceea7;
    margin-bottom: 5px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.share-item-info {
    font-size: 12px;
    color: #aaa;
    display: flex;
    justify-content: space-between;
}

/* 分享弹窗样式 */
.share-modal {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background: rgba(0, 0, 0, 0.8);
  z-index: 1000;
  justify-content: center;
  align-items: center;
  backdrop-filter: blur(5px);
}

.share-modal.show {
  display: flex;
}

.share-modal-content {
  background: rgba(20, 20, 20, 0.95);
  border: 1px solid rgba(212, 175, 55, 0.4);
  border-radius: 16px;
  width: 90%;
  max-width: 400px;
  overflow: hidden;
  animation: modalSlideIn 0.3s ease;
}

@keyframes modalSlideIn {
  from {
    opacity: 0;
    transform: translateY(-20px) scale(0.95);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

.share-modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 15px 20px;
  border-bottom: 1px solid rgba(212, 175, 55, 0.2);
  color: #d4af37;
  font-size: 16px;
  font-family: "Microsoft YaHei", sans-serif;
}

.share-modal-close {
  background: none;
  border: none;
  color: #888;
  font-size: 20px;
  cursor: pointer;
  padding: 0 5px;
  transition: color 0.2s;
}

.share-modal-close:hover {
  color: #fff;
}

.share-modal-body {
  padding: 25px 20px;
  text-align: center;
}

.share-input-section {
  display: flex;
  flex-direction: column;
  gap: 20px;
  padding: 10px 0;
}

.share-note-group {
  display: flex;
  flex-direction: column;
  gap: 8px;
  text-align: left;
}

.share-note-group label {
  color: #d4af37;
  font-size: 13px;
  font-family: "Microsoft YaHei", sans-serif;
}

.share-note-group input {
  padding: 12px;
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(212, 175, 55, 0.3);
  border-radius: 8px;
  color: #fff;
  font-size: 14px;
  font-family: "Microsoft YaHei", sans-serif;
  outline: none;
  transition: all 0.2s;
}

.share-note-group input:focus {
  border-color: rgba(212, 175, 55, 0.8);
  background: rgba(255, 255, 255, 0.15);
}

.share-action-buttons {
  display: flex;
  flex-direction: column;
  gap: 10px;
  align-items: center;
}

.share-action-buttons .btn-style {
  width: 100%;
  justify-content: center;
  font-size: 14px;
  padding: 12px;
}

.share-loading {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 15px;
  color: #aaa;
  font-family: "Microsoft YaHei", sans-serif;
}

.share-spinner {
  width: 40px;
  height: 40px;
  border: 3px solid rgba(212, 175, 55, 0.2);
  border-top: 3px solid #d4af37;
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

.share-result {
  display: flex;
  flex-direction: column;
  gap: 15px;
}

.share-success-text {
  color: #4CAF50;
  font-size: 16px;
  font-family: "Microsoft YaHei", sans-serif;
  margin: 0;
}

.share-link-box {
  display: flex;
  gap: 8px;
}

.share-link-box input {
  flex: 1;
  padding: 12px;
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(212, 175, 55, 0.3);
  border-radius: 8px;
  color: #fff;
  font-size: 13px;
  font-family: monospace;
  outline: none;
}

.share-copy-btn {
  padding: 12px 16px;
  background: rgba(212, 175, 55, 0.2);
  border: 1px solid rgba(212, 175, 55, 0.5);
  border-radius: 8px;
  color: #d4af37;
  font-size: 13px;
  cursor: pointer;
  transition: all 0.2s;
  font-family: "Microsoft YaHei", sans-serif;
  white-space: nowrap;
}

.share-copy-btn:hover {
  background: rgba(212, 175, 55, 0.4);
  color: #fff;
}

.share-copy-btn.copied {
  background: rgba(76, 175, 80, 0.3);
  border-color: rgba(76, 175, 80, 0.5);
  color: #4CAF50;
}

.share-tip {
  color: #888;
  font-size: 12px;
  font-family: "Microsoft YaHei", sans-serif;
  margin: 0;
}

.share-error {
  color: #ff6666;
  font-family: "Microsoft YaHei", sans-serif;
}

.share-error p {
  margin: 5px 0;
}

.share-retry-btn {
  margin-top: 10px;
  padding: 10px 20px;
  background: rgba(212, 175, 55, 0.2);
  border: 1px solid rgba(212, 175, 55, 0.5);
  border-radius: 8px;
  color: #d4af37;
  font-size: 14px;
  cursor: pointer;
  transition: all 0.2s;
  font-family: "Microsoft YaHei", sans-serif;
}

.share-retry-btn:hover {
  background: rgba(212, 175, 55, 0.4);
  color: #fff;
}

/* 分享模式提示样式 */
.share-mode-banner {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  background: linear-gradient(90deg, rgba(212, 175, 55, 0.9), rgba(255, 200, 100, 0.9));
  color: #000;
  text-align: center;
  padding: 10px 15px;
  font-size: 14px;
  font-family: "Microsoft YaHei", sans-serif;
  z-index: 100;
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 10px;
}

.share-mode-banner button {
  padding: 5px 15px;
  background: rgba(0, 0, 0, 0.2);
  border: 1px solid rgba(0, 0, 0, 0.3);
  border-radius: 15px;
  color: #000;
  font-size: 12px;
  cursor: pointer;
  transition: all 0.2s;
}

.share-mode-banner button:hover {
  background: rgba(0, 0, 0, 0.3);
}

.share-mode-banner #close-banner-btn {
  padding: 2px 8px;
  border-radius: 50%;
  font-size: 14px;
  line-height: 1;
  min-width: 24px;
  min-height: 24px;
}

/* Toggle Switch */
.switch {
  position: relative;
  display: inline-block;
  width: 44px;
  height: 22px;
  margin-right: 10px;
}

.switch input {
  opacity: 0;
  width: 0;
  height: 0;
}

.slider {
  position: absolute;
  cursor: pointer;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: rgba(255, 255, 255, 0.1);
  transition: .4s;
  border-radius: 22px;
  border: 1px solid rgba(212, 175, 55, 0.3);
}

.slider:before {
  position: absolute;
  content: "";
  height: 16px;
  width: 16px;
  left: 2px;
  bottom: 2px;
  background-color: #888;
  transition: .4s;
  border-radius: 50%;
}

input:checked + .slider {
  background-color: rgba(212, 175, 55, 0.2);
  border-color: rgba(212, 175, 55, 0.8);
}

input:checked + .slider:before {
  transform: translateX(22px);
  background-color: #d4af37;
  box-shadow: 0 0 10px rgba(212, 175, 55, 0.6);
}

/* Adjust the container */
.share-toggle-group {
    display: flex; 
    flex-direction: row; 
    align-items: center; 
    margin-top: 15px;
    padding: 0 5px;
}

.toggle-label {
    cursor: pointer; 
    user-select: none;
    color: #bbb;
    font-size: 13px;
    font-family: "Microsoft YaHei", sans-serif;
    transition: color 0.3s;
}

.switch input:checked ~ .toggle-label {
    color: #d4af37;
}

/* 告白信样式 - 圣诞信封版 */
.confession-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 2000;
    background: rgba(0, 0, 0, 0.6);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity 0.5s ease;
    backdrop-filter: blur(5px);
    pointer-events: none;
}

.confession-overlay.show {
    opacity: 1;
    pointer-events: auto;
}

.envelope-wrapper {
    position: relative;
    width: 100%;
    max-width: 600px;
    height: 400px;
    display: flex;
    justify-content: center;
    align-items: center;
    perspective: 1000px;
}

.envelope {
    position: relative;
    width: 320px;
    height: 220px;
    background: #c0392b; /* 圣诞红 */
    box-shadow: 0 10px 30px rgba(0,0,0,0.5);
    transition: transform 0.6s cubic-bezier(0.4, 0, 0.2, 1);
    transform-style: preserve-3d;
}

/* 放大信封以便阅读 */
.envelope.open {
    transform: translateY(100px);
}

.envelope-front {
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 0;
    border-style: solid;
    border-width: 0 160px 120px 160px;
    border-color: transparent transparent #e74c3c transparent; /* 浅一点的红 */
    z-index: 10;
    transform-origin: bottom;
    pointer-events: none;
}

.envelope-front::after {
    content: "";
    position: absolute;
    bottom: -120px;
    left: -160px;
    width: 0;
    height: 0;
    border-style: solid;
    border-width: 0 160px 120px 160px;
    border-color: transparent transparent rgba(0,0,0,0.1) transparent;
    pointer-events: none;
}

.envelope-back {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: #c0392b;
    z-index: 1;
}

.envelope-flap {
    position: absolute;
    top: 0;
    left: 0;
    width: 0;
    height: 0;
    border-style: solid;
    border-width: 110px 160px 0 160px;
    border-color: #a93226 transparent transparent transparent; /* 深红 */
    z-index: 11;
    transform-origin: top;
    transition: transform 0.6s 0.2s cubic-bezier(0.4, 0, 0.2, 1), z-index 0s 0.4s;
}

.envelope.open .envelope-flap {
    transform: rotateX(180deg);
    z-index: 1;
}

.envelope-seal {
    position: absolute;
    top: 90px;
    left: 50%;
    transform: translateX(-50%);
    width: 40px;
    height: 40px;
    background: #f1c40f; /* 金色 */
    border-radius: 50%;
    z-index: 12;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 2px 5px rgba(0,0,0,0.3);
    font-size: 20px;
    transition: opacity 0.4s 0.2s, transform 0.4s 0.2s;
    cursor: pointer;
}

.envelope.open .envelope-seal {
    opacity: 0;
    transform: translateX(-50%) scale(0.5);
    pointer-events: none;
}

.letter {
    position: absolute;
    top: 10px;
    left: 10px;
    width: 300px;
    height: 200px;
    background: #fff;
    border-radius: 5px;
    z-index: 5;
    /* 关闭时的过渡：先缩回大小(0.5s)，再放回信封(0.5s delay) */
    transition: width 0.5s ease, 
                height 0.5s ease,
                top 0.5s ease,
                left 0.5s ease,
                margin-left 0.5s ease,
                border-radius 0.5s ease,
                box-shadow 0.5s ease,
                transform 0.5s 0.4s ease; /* 延迟位移，等缩小后再放回去 */
    overflow: hidden;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    display: flex;
    flex-direction: column;
}

.envelope.open .letter {
    transform: translateY(-220px);
    z-index: 15;
    /* 展开成大信纸 */
    width: 90vw;
    max-width: 500px;
    height: 70vh;
    max-height: 600px;
    top: -150px; /* 调整最终位置 */
    left: 50%;
    margin-left: -250px; /* 居中: -width/2 */
    border-radius: 10px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.3);
    
    /* 打开时的过渡：先移出信封(0.6s delay for flap)，再展开(1s delay) */
    transition: transform 0.6s 0.4s cubic-bezier(0.34, 1.56, 0.64, 1), 
                width 0.6s 1s ease, 
                height 0.6s 1s ease,
                top 0.6s 1s ease,
                left 0.6s 1s ease,
                margin-left 0.6s 1s ease,
                border-radius 0.6s 1s ease,
                box-shadow 0.6s 1s ease;
}

@media (max-width: 600px) {
    .envelope.open .letter {
        margin-left: -45vw;
    }
}

.letter-inner {
    padding: 30px;
    height: 100%;
    box-sizing: border-box;
    background-image: 
        radial-gradient(#d4af37 1px, transparent 1px),
        radial-gradient(#d4af37 1px, transparent 1px);
    background-position: 0 0, 20px 20px;
    background-size: 40px 40px;
    position: relative;
    display: flex;
    flex-direction: column;
    border: 2px solid #d4af37;
    border-radius: 8px;
    margin: 5px;
}

.letter::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 20px;
    background: repeating-linear-gradient(
        45deg,
        #c0392b,
        #c0392b 10px,
        #fff 10px,
        #fff 20px,
        #27ae60 20px,
        #27ae60 30px,
        #fff 30px,
        #fff 40px
    );
    z-index: 2;
}

.letter::after {
    content: "";
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 20px;
    background: repeating-linear-gradient(
        -45deg,
        #c0392b,
        #c0392b 10px,
        #fff 10px,
        #fff 20px,
        #27ae60 20px,
        #27ae60 30px,
        #fff 30px,
        #fff 40px
    );
    z-index: 2;
}

.confession-close {
    position: absolute;
    top: 30px;
    right: 20px;
    background: none;
    border: none;
    font-size: 24px;
    color: #c0392b;
    cursor: pointer;
    z-index: 20;
    opacity: 0;
    transition: opacity 0.5s 1.5s;
}

.envelope.open .confession-close {
    opacity: 1;
}

.confession-close:hover {
    transform: scale(1.1);
}

.confession-content {
    font-family: 'Courier New', Courier, monospace;
    font-size: 16px;
    line-height: 1.8;
    color: #2c3e50;
    white-space: pre-wrap;
    flex: 1;
    overflow-y: auto;
    padding: 20px 10px;
    opacity: 0;
    transition: opacity 0.5s 1.8s;
}

.envelope.open .confession-content {
    opacity: 1;
}

.confession-content::-webkit-scrollbar {
    width: 6px;
}

.confession-content::-webkit-scrollbar-thumb {
    background: rgba(192, 57, 43, 0.3);
    border-radius: 3px;
}

.letter-decoration {
    position: absolute;
    font-size: 24px;
    pointer-events: none;
    opacity: 0;
    transition: opacity 0.5s 1.5s;
}

.envelope.open .letter-decoration {
    opacity: 1;
}

.deco-tl { top: 30px; left: 20px; font-size: 30px; animation: float 3s ease-in-out infinite; }
.deco-tr { top: 30px; right: 50px; font-size: 30px; animation: float 3s ease-in-out infinite 1s; }
.deco-bl { bottom: 30px; left: 20px; font-size: 30px; animation: bounce 2s infinite; }
.deco-br { bottom: 30px; right: 20px; font-size: 30px; animation: bounce 2s infinite 1s; }

@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-10px); }
}

@keyframes bounce {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.1); }
}

.confession-content::after {
    content: '|';
    animation: blink 1s infinite;
    color: #ff4081;
}

@keyframes blink {
    0%, 100% { opacity: 1; }
    50% { opacity: 0; }
}

/* 告白信管理面板 */
.confession-manager {
    position: absolute;
    bottom: 80px;
    left: 20px;
    width: 320px;
    background: rgba(20, 30, 20, 0.95);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 215, 0, 0.3);
    border-radius: 12px;
    padding: 15px;
    color: #fff;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.5);
    z-index: 1000;
    display: none;
    flex-direction: column;
    gap: 15px;
    transition: transform 0.3s ease, opacity 0.3s ease;
}

.confession-manager.show {
    display: flex;
}

.confession-manager-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    padding-bottom: 10px;
    cursor: grab;
}

.confession-manager-title {
    color: #d4af37;
    font-size: 14px;
    font-family: "Microsoft YaHei", sans-serif;
}

.confession-manager-close {
    background: none;
    border: none;
    color: #888;
    font-size: 18px;
    cursor: pointer;
    padding: 0 5px;
    transition: color 0.2s;
}

.confession-manager-close:hover {
    color: #fff;
}

.confession-textarea {
    width: 100%;
    height: 150px;
    background: rgba(0, 0, 0, 0.3);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 6px;
    color: #fff;
    padding: 10px;
    font-family: inherit;
    resize: none;
    box-sizing: border-box;
}

.confession-textarea:focus {
    outline: none;
    border-color: #ff4081;
}

.confession-buttons {
    display: flex;
    gap: 10px;
}