/* ===== 基础 ===== */
:root {
  --paper: #f4efe4;
  --paper-2: #fbf8f2;
  --ink: #221c15;
  --ink-2: #6b6156;
  --ink-3: #a79c8e;
  --line: rgba(34, 28, 21, .09);
  --shadow-sm: 0 1px 2px rgba(48, 36, 18, .06), 0 6px 16px -10px rgba(48, 36, 18, .20);
  --shadow-lg: 0 2px 4px rgba(48, 36, 18, .06), 0 20px 40px -16px rgba(48, 36, 18, .30);
  --radius: 12px;
  --ease: cubic-bezier(.22, .8, .24, 1);
  --title-font: "LXGW WenKai", "KaiTi", "STKaiti", "楷体", "FangSong", serif;
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  min-height: 100vh;
  background: var(--paper);
  color: var(--ink);
  font-family: system-ui, -apple-system, "Segoe UI", "Microsoft YaHei", "PingFang SC", "Hiragino Sans GB", sans-serif;
  font-size: 15px;
  line-height: 1.6;
  overflow-x: hidden;
}

/* ===== 随机背景层 ===== */
.bg {
  position: fixed;
  inset: 0;
  z-index: -1;
  overflow: hidden;
  pointer-events: none;
}

.bg-photo {
  position: absolute;
  inset: -8%;
  background-size: cover;          /* 铺满，不拉伸不变形 */
  background-position: center;
  background-repeat: no-repeat;
  filter: blur(26px) saturate(1.06);
  transform: scale(1.02);
  opacity: 0;
  transition: opacity .9s var(--ease);
  will-change: opacity;
}

.bg-photo.show { opacity: .92; }

.bg-veil {
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg,
    rgba(250, 246, 238, .58) 0%,
    rgba(245, 239, 228, .70) 50%,
    rgba(238, 231, 217, .80) 100%);
}

/* ===== 页头 ===== */
.site-header {
  max-width: 1180px;
  margin: 0 auto;
  padding: clamp(38px, 7vh, 84px) 22px clamp(26px, 4vh, 46px);
  text-align: center;
}

.title {
  margin: 0 auto;
  max-width: 1080px;
  font-family: var(--title-font);
  font-weight: 700;
  font-size: clamp(20px, 3.5vw, 42px);
  line-height: 1.55;
  letter-spacing: .03em;
  text-align: center;
  -webkit-user-select: none;
  user-select: none;
}

/* 被涂黑的样子：黑块自动跟随文字宽度与换行 */
.title-text {
  display: inline;
  padding: .05em .32em .12em;
  border-radius: 3px;
  background-color: var(--ink);
  color: transparent;
  -webkit-text-fill-color: transparent;
  -webkit-box-decoration-break: clone;
  box-decoration-break: clone;
  transition: background-color .5s var(--ease), color .32s ease .12s;
  cursor: default;
}

/* 鼠标移上来 / 触摸点一下：墨迹褪去，文字浮现 */
.title:hover .title-text,
.title.revealed .title-text {
  background-color: transparent;
  color: var(--ink);
  -webkit-text-fill-color: var(--ink);
}

.meta {
  margin: 22px 0 0;
  font-size: 12.5px;
  color: var(--ink-3);
  letter-spacing: .02em;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  flex-wrap: wrap;
}

.meta .dot { opacity: .5; }

.bg-next {
  font: inherit;
  font-size: 12px;
  color: var(--ink-2);
  background: rgba(255, 255, 255, .5);
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 2px 11px;
  cursor: pointer;
  transition: background .25s, color .25s, border-color .25s;
}

.bg-next:hover {
  background: var(--ink);
  color: var(--paper-2);
  border-color: var(--ink);
}

.bg-next.is-swap {
  background: var(--ink);
  color: var(--paper-2);
  border-color: var(--ink);
  transform: scale(.94);
}

/* ===== 网格 ===== */
.wall {
  max-width: 1180px;
  margin: 0 auto;
  padding: 0 22px 80px;
}

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(224px, 1fr));
  gap: 22px;
  align-items: start;
}

.card {
  position: relative;
  background: var(--paper-2);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  cursor: zoom-in;
  transition: transform .4s var(--ease), box-shadow .4s var(--ease), opacity .25s;
  touch-action: manipulation;
  -webkit-tap-highlight-color: transparent;
}

.card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
}

.card-media {
  display: block;
  aspect-ratio: 3 / 4;
  overflow: hidden;
  background: linear-gradient(135deg, #e9e2d4, #ddd4c3);
}

.card-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;          /* 缩略图等比裁切，不拉伸 */
  display: block;
  opacity: 0;
  transition: opacity .6s ease, transform .7s var(--ease);
}

.card-media img.loaded { opacity: 1; }

.card:hover .card-media img { transform: scale(1.045); }

/* 备注区 */
.card-note {
  padding: 9px 12px 11px;
  font-size: 12.5px;
  line-height: 1.55;
  color: var(--ink-2);
  min-height: 36px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  border-top: 1px solid rgba(34, 28, 21, .045);
  background: var(--paper-2);
}

.card-note.is-empty {
  color: var(--ink-3);
  opacity: .62;
}

/* 拖拽状态 */
.card.dragging {
  z-index: 50;
  cursor: grabbing;
  box-shadow: 0 24px 48px -12px rgba(48, 36, 18, .42);
  transition: box-shadow .2s;
  pointer-events: none;
  opacity: .96;
}

.card.drop-target::before {
  content: "";
  position: absolute;
  inset: -3px;
  border-radius: calc(var(--radius) + 3px);
  border: 2px dashed rgba(160, 120, 60, .55);
  pointer-events: none;
}

.grid.sorting .card { transition: transform .22s var(--ease), box-shadow .3s; }

.empty-tip {
  text-align: center;
  color: var(--ink-3);
  font-size: 13.5px;
  padding: 40px 0;
}

.empty-tip code {
  background: rgba(34, 28, 21, .06);
  padding: 2px 6px;
  border-radius: 4px;
  font-size: 12px;
}

/* ===== 页脚 ===== */
.site-footer {
  text-align: center;
  padding: 0 22px 46px;
  font-size: 12px;
  color: var(--ink-3);
  letter-spacing: .06em;
}

/* ===== 大图查看器 ===== */
.viewer[hidden] { display: none; }

.viewer {
  position: fixed;
  inset: 0;
  z-index: 200;
  display: flex;
  flex-direction: column;
  background: rgba(22, 18, 13, .94);
  -webkit-backdrop-filter: blur(18px);
  backdrop-filter: blur(18px);
  opacity: 0;
  transition: opacity .3s ease;
}

.viewer.open { opacity: 1; }

.viewer-stage {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 56px 72px 12px;
  min-height: 0;
}

.viewer-stage img {
  max-width: 100%;
  max-height: 100%;
  object-fit: contain;       /* 原比例完整显示，不裁切不拉伸 */
  border-radius: 4px;
  box-shadow: 0 30px 80px -20px rgba(0, 0, 0, .8);
  opacity: 0;
  transform: scale(.985);
  transition: opacity .35s ease, transform .35s var(--ease);
}

.viewer-stage img.loaded {
  opacity: 1;
  transform: scale(1);
}

.viewer-close {
  position: absolute;
  top: 18px;
  right: 20px;
  width: 42px;
  height: 42px;
  border: none;
  border-radius: 50%;
  background: rgba(255, 255, 255, .1);
  color: rgba(255, 255, 255, .86);
  font-size: 26px;
  line-height: 1;
  cursor: pointer;
  transition: background .25s, transform .25s;
  z-index: 2;
}

.viewer-close:hover { background: rgba(255, 255, 255, .2); transform: rotate(90deg); }

.viewer-nav {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 52px;
  height: 88px;
  border: none;
  background: transparent;
  color: rgba(255, 255, 255, .55);
  font-size: 44px;
  line-height: .8;
  cursor: pointer;
  transition: color .25s, background .25s;
  border-radius: 8px;
  z-index: 2;
}

.viewer-nav:hover { color: #fff; background: rgba(255, 255, 255, .07); }
.viewer-nav.prev { left: 10px; }
.viewer-nav.next { right: 10px; }

.viewer-bar {
  flex: 0 0 auto;
  padding: 14px 76px 30px;
  text-align: center;
  color: rgba(255, 255, 255, .9);
}

.viewer-note-wrap {
  max-width: 760px;
  margin: 0 auto;
}

.viewer-note {
  font-size: 14.5px;
  line-height: 1.7;
  min-height: 1.7em;
  white-space: pre-wrap;
  word-break: break-word;
  border-radius: 8px;
  padding: 4px 8px;
  transition: background .2s;
}

.viewer-note-wrap.editable .viewer-note {
  cursor: text;
}

.viewer-note-wrap.editable .viewer-note:hover {
  background: rgba(255, 255, 255, .08);
}

.viewer-note.is-empty { color: rgba(255, 255, 255, .34); }

.viewer-note-wrap.is-editing .viewer-note { display: none; }

.viewer-edit {
  display: block;
  width: 100%;
  box-sizing: border-box;
  background: rgba(255, 255, 255, .09);
  border: 1px solid rgba(255, 255, 255, .2);
  border-radius: 8px;
  color: #fff;
  font: inherit;
  font-size: 14.5px;
  line-height: 1.7;
  padding: 10px 12px;
  resize: vertical;
  min-height: 82px;
  outline: none;
  transition: border-color .2s, background .2s;
}

.viewer-edit:focus {
  border-color: rgba(255, 255, 255, .45);
  background: rgba(255, 255, 255, .12);
}

.viewer-edit::placeholder { color: rgba(255, 255, 255, .3); }

.viewer-edit-actions {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  margin-top: 12px;
}

.edit-btn {
  font: inherit;
  font-size: 13px;
  padding: 5px 18px;
  border-radius: 999px;
  cursor: pointer;
  border: 1px solid rgba(255, 255, 255, .25);
  background: transparent;
  color: rgba(255, 255, 255, .8);
  transition: background .2s, color .2s, border-color .2s;
}

.edit-btn.save {
  background: #fff;
  color: #1a1611;
  border-color: #fff;
  font-weight: 600;
}

.edit-btn.save:hover { background: #f0e9dc; }

.edit-btn.cancel:hover { background: rgba(255, 255, 255, .12); }

.edit-hint {
  font-size: 11.5px;
  color: rgba(255, 255, 255, .32);
}

.viewer-foot {
  margin-top: 10px;
  font-size: 11.5px;
  color: rgba(255, 255, 255, .4);
  letter-spacing: .05em;
  display: flex;
  justify-content: center;
  gap: 14px;
}

/* ===== 背景音乐按钮 ===== */
.music-btn {
  position: fixed;
  right: 22px;
  bottom: 22px;
  z-index: 60;
  width: 46px;
  height: 46px;
  padding: 0;
  border-radius: 50%;
  border: 1px solid rgba(34, 28, 21, .12);
  background: rgba(255, 255, 255, .78);
  -webkit-backdrop-filter: blur(14px);
  backdrop-filter: blur(14px);
  color: var(--ink-2);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 8px 22px -10px rgba(48, 36, 18, .4);
  transition: transform .25s var(--ease), background .3s, color .3s;
  -webkit-tap-highlight-color: transparent;
}

.music-btn:hover { transform: scale(1.07); }
.music-btn:active { transform: scale(.96); }

.music-glyph {
  font-size: 19px;
  line-height: 1;
  transition: transform .3s;
}

.music-btn.playing {
  background: var(--ink);
  border-color: var(--ink);
  color: var(--paper-2);
}

.music-btn.playing .music-glyph { animation: glyph-bounce 1.1s ease-in-out infinite; }

.music-ring {
  position: absolute;
  inset: -3px;
  border-radius: 50%;
  border: 1.5px solid rgba(180, 138, 74, .55);
  opacity: 0;
  pointer-events: none;
}

.music-btn.playing .music-ring {
  opacity: 1;
  animation: music-pulse 2.6s ease-out infinite;
}

@keyframes glyph-bounce {
  0%, 100% { transform: translateY(0) rotate(-6deg); }
  50%      { transform: translateY(-2px) rotate(6deg); }
}

@keyframes music-pulse {
  0%   { transform: scale(1);    opacity: .75; }
  70%  { transform: scale(1.35); opacity: 0; }
  100% { transform: scale(1.35); opacity: 0; }
}

/* ===== 响应式 ===== */
@media (max-width: 860px) {
  .grid { grid-template-columns: repeat(3, 1fr); gap: 14px; }
  .title { font-size: clamp(19px, 4.6vw, 30px); }
  .viewer-stage { padding: 52px 12px 8px; }
  .viewer-nav { width: 40px; font-size: 38px; }
  .viewer-bar { padding: 12px 24px 26px; }
}

@media (max-width: 560px) {
  .wall { padding: 0 14px 60px; }
  .grid { grid-template-columns: repeat(2, 1fr); gap: 11px; }
  .card-note { font-size: 11.5px; padding: 7px 9px 9px; min-height: 32px; }
  .viewer-nav {
    top: auto;
    bottom: 120px;
    transform: none;
    height: 56px;
  }
  .viewer-nav.prev { left: 8px; }
  .viewer-nav.next { right: 8px; }
}

/* 减少动效偏好 */
@media (prefers-reduced-motion: reduce) {
  * { transition-duration: .01ms !important; animation-duration: .01ms !important; }
}