/* ==========================================================================
   团子的成长日记 🍡 · sections.css
   视觉工程组
   —— 轮播(scroll-snap) / 成长时间线(缝纫虚线) / 拍立得照片墙 /
      里程碑(奖牌+进度环) / 成长图表(--h 生长) / 时光信箱(信封+火漆) /
      关于页家族卡(.fam-*) / 旧版类名兜底定义
   颜色纪律：只用 var() / color-mix(var())；hover 全部包 @media (hover:hover)。
   ========================================================================== */

/* --------------------------------------------------------------------------
   1. 精选瞬间轮播（CSS scroll-snap 原生横向滑动，JS 只 scrollBy/同步 dots）
   -------------------------------------------------------------------------- */
#carousel {
  overflow: clip; /* 契约锚点：两侧 peek 的 slide 不产生横向滚动 */
}

.carousel-viewport {
  position: relative;
  max-width: 900px;
  margin-inline: auto;
}

/* 原生滚动容器：两侧 padding 让首尾 slide 也能居中吸附 */
.carousel-track {
  display: flex;
  gap: 16px;
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  scroll-behavior: smooth;
  padding: 18px max(calc(50% - 212px), 20px) 26px;
  scrollbar-width: none;
  overscroll-behavior-x: contain;
}

.carousel-track::-webkit-scrollbar { display: none; }

/* 拍立得相框卡 */
.carousel-slide {
  flex: 0 0 min(78vw, 424px);
  scroll-snap-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 10px;
  min-height: 300px;
  padding: 16px 16px 18px;
  border-radius: var(--r-sm);
  border: 1px solid var(--line);
  background:
    linear-gradient(160deg,
      color-mix(in srgb, var(--c-primary-soft) 30%, var(--surface)) 0%,
      color-mix(in srgb, var(--c-sky) 26%, var(--surface)) 100%);
  box-shadow: var(--shadow-md);
  text-align: center;
}

/* slide 内部约定类（页面组/交互组可选使用，见交付说明） */
.carousel-emoji {
  width: min(56vw, 220px);
  aspect-ratio: 4 / 3;
  display: grid;
  place-items: center;
  border-radius: var(--r-sm);
  background: var(--surface);
  box-shadow: inset var(--shadow-sm);
  font-size: clamp(64px, 18vw, 96px);
  line-height: 1.15;
}

.carousel-title {
  font-family: var(--font-round);
  font-size: var(--fs-lg);
  font-weight: 800;
  color: var(--ink-1);
}

.carousel-date {
  font-size: var(--fs-xs);
  font-weight: 700;
  color: var(--ink-2);
  font-variant-numeric: tabular-nums;
}

/* 前后按钮 */
.carousel-btn {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  z-index: 5;
  width: 46px;
  height: 46px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  border: 1px solid var(--line);
  background: color-mix(in srgb, var(--surface) 90%, transparent);
  -webkit-backdrop-filter: blur(8px);
  backdrop-filter: blur(8px);
  box-shadow: var(--shadow-md);
  color: var(--ink-1);
  font-size: 19px;
  line-height: 1;
  transition: background-color var(--t-fast) var(--ease-out),
              transform var(--t-fast) var(--ease-out),
              box-shadow var(--t-base) var(--ease-out);
}

.carousel-btn.prev { left: 8px; }
.carousel-btn.next { right: 8px; }

@media (hover: hover) {
  .carousel-btn:hover {
    background: color-mix(in srgb, var(--c-primary-soft) 70%, transparent);
    transform: translateY(-50%) scale(1.06);
    box-shadow: var(--shadow-lg);
  }
}

.carousel-btn:focus-visible {
  outline: none;
  box-shadow: var(--ring);
}

/* dots：24px 视觉格 + ::after 外扩成 44px 命中区；active 拉长为胶囊 */
.carousel-dots {
  display: flex;
  justify-content: center;
  gap: 6px;
  margin-top: 4px;
}

.carousel-dot {
  position: relative;
  width: 24px;
  height: 24px;
  padding: 0;
  border: 0;
  border-radius: var(--r-pill);
  background: transparent;
  cursor: pointer;
}

.carousel-dot::after {
  content: "";
  position: absolute;
  inset: -10px;          /* 24 → 44px 有效触达 */
  border-radius: 50%;
}

.carousel-dot::before {
  content: "";
  position: absolute;
  inset: 9px 7px;
  border-radius: var(--r-pill);
  background: color-mix(in srgb, var(--ink-3) 48%, transparent);
  transition: background-color var(--t-fast) var(--ease-out),
              inset var(--t-fast) var(--ease-spring);
}

.carousel-dot.active::before {
  inset: 9px 3px;        /* active：拉长的胶囊 */
  background: var(--c-primary);
}

.carousel-dot:focus-visible {
  outline: none;
  box-shadow: var(--ring);
}

@media (hover: hover) {
  .carousel-dot:hover::before {
    background: color-mix(in srgb, var(--c-primary-strong) 55%, transparent);
  }
}

/* --------------------------------------------------------------------------
   2. 照片墙筛选器（aria-pressed 状态）
   -------------------------------------------------------------------------- */
#gallery-filters {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 10px;
  margin-bottom: 36px;
}

.filter-btn {
  min-height: 44px;
  padding: 9px 20px;
  border-radius: var(--r-pill);
  border: 2px solid color-mix(in srgb, var(--c-primary-soft) 72%, transparent);
  background: var(--surface);
  color: var(--ink-2);
  font-size: var(--fs-sm);
  font-weight: 700;
  transition: background-color var(--t-fast) var(--ease-out),
              border-color var(--t-fast) var(--ease-out),
              color var(--t-fast) var(--ease-out),
              transform var(--t-fast) var(--ease-out),
              box-shadow var(--t-base) var(--ease-out);
}

#gallery-filters .filter-btn[aria-pressed="true"],
.filter-btn[aria-pressed="true"] {
  background: var(--c-primary);
  border-color: var(--c-primary);
  color: var(--bg); /* 同 .btn-primary 的双主题自动对比策略 */
  box-shadow: var(--shadow-md);
}

@media (hover: hover) {
  .filter-btn:hover {
    border-color: var(--c-primary);
    color: var(--c-primary-strong);
    transform: translateY(-1px);
  }
  .filter-btn[aria-pressed="true"]:hover {
    color: var(--bg);
  }
}

/* --------------------------------------------------------------------------
   3. 拍立得照片墙
   -------------------------------------------------------------------------- */
#gallery-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 30px 22px;
  max-width: 1000px;
  margin-inline: auto;
}

.photo-card {
  position: relative;
  animation: fade-up var(--t-base) var(--ease-out) backwards;
}
.photo-card:nth-child(5n+2) { animation-delay: var(--stagger); }
.photo-card:nth-child(5n+3) { animation-delay: calc(var(--stagger) * 2); }
.photo-card:nth-child(5n+4) { animation-delay: calc(var(--stagger) * 3); }
.photo-card:nth-child(5n+5) { animation-delay: calc(var(--stagger) * 4); }

/* 相邻卡微倾（±2° 内），hover 转正抬升 */
.photo-card:nth-child(4n+1) { --tilt: -2deg;  --tape-tilt: -4deg; }
.photo-card:nth-child(4n+2) { --tilt: 1.6deg; --tape-tilt: 3deg; }
.photo-card:nth-child(4n+3) { --tilt: -1.2deg;--tape-tilt: -3deg; }
.photo-card:nth-child(4n+4) { --tilt: 2.2deg; --tape-tilt: 4deg; }

/* 白框拍立得：padding 12 / 12 / 48，底部留白常驻 caption + date */
.photo-frame {
  position: relative;
  padding: 12px 12px 48px;
  border-radius: var(--r-xs);
  border: 1px solid var(--line);
  background: var(--surface);
  box-shadow: var(--shadow-md);
  transform: rotate(var(--tilt, 0deg));
  transition: transform var(--t-base) var(--ease-out),
              box-shadow var(--t-base) var(--ease-out);
}

.photo-media {
  position: relative;
  aspect-ratio: 1 / 1;
  display: grid;
  place-items: center;
  overflow: hidden;
  border-radius: 6px;
  /* 分类渐变兜底色（暖米），具体分类覆盖见下 */
  background: linear-gradient(140deg,
              color-mix(in srgb, var(--c-apricot) 40%, var(--surface)),
              color-mix(in srgb, var(--c-sun) 42%, var(--surface)));
}

/* 新生儿=butter / 满月=pink / 日常=mint / 全家福=sky */
.photo-card[data-category="newborn"] .photo-media {
  background: linear-gradient(140deg,
              color-mix(in srgb, var(--c-sun) 52%, var(--surface)),
              color-mix(in srgb, var(--c-apricot) 46%, var(--surface)));
}
.photo-card[data-category="monthly"] .photo-media,
.photo-card[data-category="fullmoon"] .photo-media {
  background: linear-gradient(140deg,
              color-mix(in srgb, var(--c-primary-soft) 62%, var(--surface)),
              color-mix(in srgb, var(--c-primary) 34%, var(--surface)));
}
.photo-card[data-category="daily"] .photo-media {
  background: linear-gradient(140deg,
              color-mix(in srgb, var(--c-mint) 58%, var(--surface)),
              color-mix(in srgb, var(--c-sky) 36%, var(--surface)));
}
.photo-card[data-category="family"] .photo-media {
  background: linear-gradient(140deg,
              color-mix(in srgb, var(--c-sky) 56%, var(--surface)),
              color-mix(in srgb, var(--c-lilac) 40%, var(--surface)));
}

.ph-emoji {
  font-size: 54px;
  line-height: 1;
  filter: drop-shadow(0 4px 6px color-mix(in srgb, var(--ink-1) 14%, transparent));
}

/* 真实照片铺满占位区 */
.photo-media img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* 说明与日期常显在白框下缘（弃 hover overlay） */
.photo-caption {
  position: absolute;
  left: 14px;
  right: 14px;
  bottom: 25px;
  margin: 0;
  font-size: var(--fs-sm);
  font-weight: 800;
  color: var(--ink-1);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.photo-date {
  position: absolute;
  left: 14px;
  right: 14px;
  bottom: 7px;
  font-size: var(--fs-xs);
  font-weight: 600;
  color: var(--ink-2);
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* 和纸胶带：优先渲染 JS 给的 .tape 元素；缺失时由 ::before 兜底 */
.tape,
.photo-frame:not(:has(.tape))::before {
  content: "";
  position: absolute;
  top: -11px;
  left: 50%;
  width: 92px;
  height: 24px;
  z-index: 2;
  transform: translateX(-50%) rotate(var(--tape-tilt, -3deg));
  background: color-mix(in srgb, var(--c-sun) 55%, transparent);
  box-shadow: 0 1px 2px color-mix(in srgb, var(--ink-1) 8%, transparent);
  border-left: 1px dashed color-mix(in srgb, var(--ink-1) 12%, transparent);
  border-right: 1px dashed color-mix(in srgb, var(--ink-1) 12%, transparent);
}

@media (hover: hover) {
  .photo-card:hover .photo-frame,
  .photo-frame:hover {
    transform: rotate(0deg) translateY(-6px);
    box-shadow: var(--shadow-lg);
  }
}

.photo-card:focus-within .photo-frame {
  transform: rotate(0deg) translateY(-6px);
  box-shadow: var(--shadow-lg);
}

/* 放大镜角标（旧版类名，v2 必须有定义）：hover 时浮现 */
.gallery-action {
  position: absolute;
  top: 10px;
  right: 10px;
  width: 34px;
  height: 34px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  border: 1px solid var(--line);
  background: color-mix(in srgb, var(--surface) 88%, transparent);
  color: var(--c-primary-strong);
  font-size: 15px;
  opacity: 0;
  transform: scale(.8);
  transition: opacity var(--t-fast) var(--ease-out),
              transform var(--t-fast) var(--ease-spring);
}

@media (hover: hover) {
  .photo-card:hover .gallery-action {
    opacity: 1;
    transform: scale(1);
  }
}

/* 筛选隐藏态：兼容多种常见开关写法 */
.photo-card[hidden],
.photo-card.hidden,
.photo-card.is-hidden,
.photo-card.filtered-out {
  display: none !important;
}

.gallery-hint {
  margin-top: 30px;
  text-align: center;
  font-size: var(--fs-sm);
  color: var(--ink-3); /* 装饰性短标注 */
}

/* --------------------------------------------------------------------------
   4. 成长时间线（缝纫虚线中轴 + 40px 彩底贴纸节点）
   -------------------------------------------------------------------------- */
.timeline {
  position: relative;
  max-width: 900px;
  margin-inline: auto;
  padding-block: 12px;
}

/* 缝纫虚线中轴 */
.timeline::before {
  content: "";
  position: absolute;
  top: 0;
  bottom: 0;
  left: 50%;
  width: 4px;
  transform: translateX(-50%);
  border-radius: 2px;
  background: repeating-linear-gradient(180deg,
              var(--c-primary-soft) 0 6px,
              transparent 6px 12px);
}

/* 类别色轮换（--tone 同时驱动节点贴纸与卡片色条；
   交互组也可用 .tone-pink/.tone-sky/.tone-sun/.tone-mint 显式指定） */
.tl-item:nth-child(4n+1), .tl-item.tone-pink { --tone: var(--c-primary);       --tone-soft: var(--c-primary-soft); }
.tl-item:nth-child(4n+2), .tl-item.tone-sky  { --tone: var(--c-sky-strong);    --tone-soft: var(--c-sky); }
.tl-item:nth-child(4n+3), .tl-item.tone-sun  { --tone: var(--c-sun-strong);    --tone-soft: var(--c-sun); }
.tl-item:nth-child(4n+4), .tl-item.tone-mint { --tone: color-mix(in srgb, var(--c-mint) 70%, var(--ink-2)); --tone-soft: var(--c-mint); }

.tl-item {
  position: relative;
  width: 50%;
  padding: 10px 44px 28px;
}

#timeline-list .tl-item.left, .tl-item.left  { left: 0; }
#timeline-list .tl-item.right, .tl-item.right { left: 50%; }

/* 40px 彩底圆贴纸节点 */
.tl-dot {
  position: absolute;
  top: 22px;
  z-index: 2;
  width: 40px;
  height: 40px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  border: 3px solid var(--surface);
  background: linear-gradient(135deg,
              color-mix(in srgb, var(--tone, var(--c-primary)) 58%, var(--surface)),
              color-mix(in srgb, var(--tone, var(--c-primary)) 32%, var(--surface)));
  box-shadow: var(--shadow-sm);
  font-size: 17px;
  line-height: 1;
}

.tl-item.left  .tl-dot { right: -22px; }  /* 圆心正好落在中轴上 */
.tl-item.right .tl-dot { left: -22px; }

/* 卡片 */
.tl-card {
  position: relative;
  padding: 18px 20px;
  border-radius: var(--r-md);
  border: 1px solid var(--line);
  background: var(--surface);
  box-shadow: var(--shadow-sm);
  text-align: left;
  transition: transform var(--t-base) var(--ease-out),
              box-shadow var(--t-base) var(--ease-out);
}

/* 卡片左侧 4px 类别色条 */
.tl-card::before {
  content: "";
  position: absolute;
  left: 0;
  top: 16px;
  bottom: 16px;
  width: 4px;
  border-radius: var(--r-pill);
  background: var(--tone, var(--c-primary));
}

@media (hover: hover) {
  .tl-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
  }
}

/* 日期标签：圆体 pill */
.tl-date {
  display: inline-flex;
  align-items: center;
  margin-bottom: 10px;
  padding: 3px 12px;
  border-radius: var(--r-pill);
  background: color-mix(in srgb, var(--tone-soft, var(--c-primary-soft)) 45%, transparent);
  font-family: var(--font-round);
  font-size: var(--fs-xs);
  font-weight: 800;
  color: var(--ink-1);
  font-variant-numeric: tabular-nums;
}

.tl-icon {
  display: block;
  margin-bottom: 4px;
  font-size: 26px;
  line-height: 1.4;
}

.tl-card h3 {
  margin-bottom: 6px;
  font-size: var(--fs-lg);
}

.tl-card p {
  font-size: var(--fs-sm);
  color: var(--ink-2);
}

/* 标签列：按侧别镜像排布，颜色随条目轮换 */
.tl-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 14px;
}

.tl-item.left  .tl-tags { justify-content: flex-end; }
.tl-item.right .tl-tags { justify-content: flex-start; }

.tl-tags .tag:nth-child(4n+1) { background: color-mix(in srgb, var(--c-primary-soft) 60%, transparent); color: var(--c-primary-strong); }
.tl-tags .tag:nth-child(4n+2) { background: color-mix(in srgb, var(--c-sky) 62%, transparent);         color: color-mix(in srgb, var(--c-sky-strong) 78%, var(--ink-1)); }
.tl-tags .tag:nth-child(4n+3) { background: color-mix(in srgb, var(--c-sun) 66%, transparent);         color: color-mix(in srgb, var(--c-sun-strong) 62%, var(--ink-1)); }
.tl-tags .tag:nth-child(4n+4) { background: color-mix(in srgb, var(--c-mint) 62%, transparent);        color: color-mix(in srgb, var(--ink-2) 82%, var(--c-mint)); }

/* 入场：按 side 左/右滑入，子项 60ms 错峰（backwards 兜底，无 JS 也安全） */
@media (prefers-reduced-motion: no-preference) {
  .tl-item.left {
    animation: tl-in-left var(--t-med) var(--ease-out) backwards;
  }
  .tl-item.right {
    animation: tl-in-right var(--t-med) var(--ease-out) backwards;
  }
  .tl-item:nth-child(2)  { animation-delay: calc(var(--stagger) * 1); }
  .tl-item:nth-child(3)  { animation-delay: calc(var(--stagger) * 2); }
  .tl-item:nth-child(4)  { animation-delay: calc(var(--stagger) * 3); }
  .tl-item:nth-child(5)  { animation-delay: calc(var(--stagger) * 4); }
  .tl-item:nth-child(6)  { animation-delay: calc(var(--stagger) * 5); }
  .tl-item:nth-child(7)  { animation-delay: calc(var(--stagger) * 6); }
  .tl-item:nth-child(8)  { animation-delay: calc(var(--stagger) * 7); }
  .tl-item:nth-child(n+9){ animation-delay: calc(var(--stagger) * 8); }
}

@keyframes tl-in-left {
  from { opacity: 0; transform: translateX(-26px); }
  to   { opacity: 1; transform: none; }
}

@keyframes tl-in-right {
  from { opacity: 0; transform: translateX(26px); }
  to   { opacity: 1; transform: none; }
}

/* 移动端单列：中轴靠左，全部自左滑入 */
@media (max-width: 720px) {
  .timeline::before { left: 20px; transform: none; }

  .tl-item.left,
  .tl-item.right {
    left: 0;
    width: 100%;
    padding: 8px 4px 26px 64px;
    text-align: left;
  }

  .tl-item.left  .tl-dot,
  .tl-item.right .tl-dot {
    left: 0;
    right: auto;
  }

  .tl-item.left  .tl-tags,
  .tl-item.right .tl-tags { justify-content: flex-start; }

  @media (prefers-reduced-motion: no-preference) {
    .tl-item.right { animation-name: tl-in-left; }
  }
}

/* --------------------------------------------------------------------------
   5. 成长里程碑（achieved = conic 锯齿奖牌 + 丝带 + spring pop；
      pending = conic 进度环）
   -------------------------------------------------------------------------- */
#milestones-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(230px, 1fr));
  gap: 22px;
  max-width: 1000px;
  margin-inline: auto;
}

.ms-card {
  position: relative;
  padding: 58px 18px 22px;
  border-radius: var(--r-lg);
  border: 1px solid var(--line);
  background: var(--surface);
  box-shadow: var(--shadow-sm);
  text-align: center;
  transition: transform var(--t-base) var(--ease-out),
              box-shadow var(--t-base) var(--ease-out);
}

#milestones-grid .ms-card.achieved,
.ms-card.achieved {
  border-color: color-mix(in srgb, var(--c-sun-strong) 35%, transparent);
  animation: pop-spring var(--t-med) var(--ease-spring) backwards;
}
.ms-card.achieved:nth-child(2)   { animation-delay: var(--stagger); }
.ms-card.achieved:nth-child(n+3) { animation-delay: calc(var(--stagger) * 2); }

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

/* 奖牌章体：conic 锯齿光芒边 */
.ms-icon {
  position: relative;
  isolation: isolate;
  width: 74px;
  height: 74px;
  margin: -47px auto 12px;   /* 半悬出卡顶，像挂上的奖牌 */
  display: grid;
  place-items: center;
  border-radius: 50%;
  font-size: 32px;
  line-height: 1;
  background: repeating-conic-gradient(from 8deg,
              color-mix(in srgb, var(--c-sun-strong) 85%, var(--surface)) 0deg 12deg,
              color-mix(in srgb, var(--c-sun) 80%, var(--surface)) 12deg 24deg);
  box-shadow: var(--shadow-md);
}

.ms-icon::before {
  content: "";
  position: absolute;
  inset: 9px;
  z-index: -1;
  border-radius: 50%;
  background: radial-gradient(circle at 32% 28%,
              color-mix(in srgb, var(--c-sun) 55%, var(--surface)),
              color-mix(in srgb, var(--c-apricot) 42%, var(--surface)));
}

/* 底部丝带三角（swallowtail 双尾） */
.ms-card.achieved .ms-icon::after {
  content: "";
  position: absolute;
  bottom: -13px;
  left: 50%;
  transform: translateX(-50%);
  width: 36px;
  height: 24px;
  z-index: -1;
  clip-path: polygon(0 0, 100% 0, 100% 100%, 50% 68%, 0 100%);
  background: linear-gradient(90deg,
              var(--c-primary) 0 50%,
              color-mix(in srgb, var(--c-primary-strong) 82%, var(--c-primary)) 50% 100%);
}

/* pending：降饱和图标 + conic 进度环（--pct 由 JS 设置 0~100） */
.ms-card.pending .ms-icon {
  background: conic-gradient(var(--c-primary) calc(var(--pct, 0) * 1%),
                             var(--line) 0);
  filter: saturate(.4);
  opacity: .92;
}

.ms-card.pending .ms-icon::before {
  inset: 7px; /* 环宽 7px */
  background: var(--surface);
}

.ms-card.pending .ms-icon::after { content: none; }

.ms-name {
  font-family: var(--font-round);
  font-size: var(--fs-md);
  font-weight: 800;
  color: var(--ink-1);
}

.ms-date {
  margin-top: 4px;
  font-size: var(--fs-sm);
  font-weight: 700;
  color: var(--c-primary-strong);
  font-variant-numeric: tabular-nums;
}

.ms-detail {
  margin-top: 6px;
  font-size: var(--fs-xs);
  line-height: 1.7;
  color: var(--ink-2);
}

.ms-card.pending .ms-date { color: var(--ink-2); }

/* 右上角徽章（契约 .ms-badge；旧名 .milestone-badge 一并兼容） */
.ms-badge,
.milestone-badge {
  position: absolute;
  top: -10px;
  right: -8px;
  z-index: 3;
  min-width: 30px;
  height: 30px;
  padding-inline: 6px;
  display: inline-grid;
  place-items: center;
  border-radius: var(--r-pill);
  border: 2px solid var(--surface);
  background: color-mix(in srgb, var(--c-mint) 68%, var(--surface));
  box-shadow: var(--shadow-sm);
  font-size: var(--fs-xs);
  font-weight: 800;
  color: color-mix(in srgb, var(--ink-1) 82%, var(--c-mint));
}

.ms-card.pending .ms-badge {
  background: var(--surface-3);
  color: var(--ink-3);
  filter: saturate(.4);
}

/* 旧版 pending 进度条的兜底定义（§7：引用过的类必须有样式） */
.milestone-progress { margin-top: 12px; }

.progress-bar {
  height: 8px;
  border-radius: var(--r-pill);
  background: color-mix(in srgb, var(--c-primary-soft) 38%, transparent);
  overflow: hidden;
}

.progress-fill {
  height: 100%;
  width: 0;
  border-radius: inherit;
  background: linear-gradient(90deg, var(--c-primary-soft), var(--c-primary));
  transition: width var(--t-med) var(--ease-out);
}

/* --------------------------------------------------------------------------
   6. 成长图表（圆头柱 + 满量程轨道 + 虚线网格 + 常显数值气泡，
      bar-fill 高度由 JS 写入 --h 并以过渡生长，错峰 80ms）
   -------------------------------------------------------------------------- */
#growth-charts {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 24px;
  max-width: 880px;
  margin-inline: auto;
}

#growth-charts .chart-card,
.chart-card {
  padding: 22px 22px 18px;
  border-radius: var(--r-lg);
  border: 1px solid var(--line);
  background: var(--surface);
  box-shadow: var(--shadow-sm);
}

/* 第一张卡=身高粉，第二张=体重蓝（亦可用 .tone-pink/.tone-sky 显式指定） */
.chart-card:nth-of-type(odd),  .chart-card.tone-pink { --cat: var(--c-primary);     --cat-strong: var(--c-primary-strong); }
.chart-card:nth-of-type(even), .chart-card.tone-sky  { --cat: var(--c-sky);         --cat-strong: var(--c-sky-strong); }

.chart-card h3 {
  margin-bottom: 20px;
  text-align: center;
  font-family: var(--font-round);
  font-size: var(--fs-lg);
}

.chart-bars {
  position: relative;
  display: flex;
  align-items: stretch;
  gap: clamp(8px, 3.5%, 18px);
  height: 236px;
  padding: 34px 4px 28px;   /* 顶部留气泡、底部留标签 */
  border-bottom: 2px solid color-mix(in srgb, var(--ink-3) 38%, transparent);
}

/* 两道虚线网格参考线（33% / 66%） */
.chart-bars::before {
  content: "";
  position: absolute;
  inset: 34px 0 28px;
  pointer-events: none;
  background:
    repeating-linear-gradient(90deg,
      color-mix(in srgb, var(--ink-3) 34%, transparent) 0 7px, transparent 7px 14px)
      0 33.3% / 100% 1.5px no-repeat,
    repeating-linear-gradient(90deg,
      color-mix(in srgb, var(--ink-3) 34%, transparent) 0 7px, transparent 7px 14px)
      0 66.6% / 100% 1.5px no-repeat;
}

.bar {
  position: relative;
  flex: 1;
  max-width: 58px;
  display: flex;
  align-items: flex-end;
}

/* 满量程淡色轨道 */
.bar::before {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: var(--r-pill);
  background: color-mix(in srgb, var(--cat, var(--c-primary)) 13%, transparent);
}

.bar-fill {
  position: relative;
  width: 100%;
  height: var(--h, 0%);            /* JS 设置并动画 */
  border-radius: var(--r-pill) var(--r-pill) 6px 6px;
  background: linear-gradient(to top,
              color-mix(in srgb, var(--cat, var(--c-primary)) 46%, var(--surface)),
              color-mix(in srgb, var(--cat-strong, var(--c-primary-strong)) 88%, var(--surface)));
  box-shadow: inset 0 -3px 6px color-mix(in srgb, var(--ink-1) 6%, transparent);
  transition: height var(--t-grow) var(--ease-out);
}

/* 生长动画错峰 80ms */
.chart-bars .bar:nth-child(1)  .bar-fill { transition-delay: calc(var(--stagger-bar) * 0); }
.chart-bars .bar:nth-child(2)  .bar-fill { transition-delay: var(--stagger-bar); }
.chart-bars .bar:nth-child(3)  .bar-fill { transition-delay: calc(var(--stagger-bar) * 2); }
.chart-bars .bar:nth-child(4)  .bar-fill { transition-delay: calc(var(--stagger-bar) * 3); }
.chart-bars .bar:nth-child(5)  .bar-fill { transition-delay: calc(var(--stagger-bar) * 4); }
.chart-bars .bar:nth-child(6)  .bar-fill { transition-delay: calc(var(--stagger-bar) * 5); }
.chart-bars .bar:nth-child(n+7).bar > .bar-fill,
.chart-bars .bar:nth-child(n+7) .bar-fill { transition-delay: calc(var(--stagger-bar) * 6); }

/* 数值气泡：常显，骑在柱顶（结构 A：位于 .bar-fill 内） */
.bar-value {
  position: absolute;
  left: 50%;
  bottom: calc(100% + 7px);
  transform: translateX(-50%);
  padding: 1px 8px;
  border-radius: var(--r-pill);
  border: 1px solid var(--line);
  background: var(--surface);
  box-shadow: var(--shadow-sm);
  font-size: 13px;
  font-weight: 600;
  color: var(--ink-1);
  white-space: nowrap;
  font-variant-numeric: tabular-nums;
}

/* 结构 B：位于 .bar 直下时用同一枚 --h 定位 */
.bar > .bar-value {
  bottom: var(--h, 0%);
}

/* 底部刻度标签 */
.bar-label {
  position: absolute;
  top: calc(100% + 7px);
  left: 50%;
  transform: translateX(-50%);
  font-size: var(--fs-xs);
  font-weight: 600;
  color: var(--ink-2);
  white-space: nowrap;
}

@media (hover: hover) {
  .bar-fill:hover {
    filter: brightness(1.05);
  }
}

/* 汇总芯片行 */
#growth-summary {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  align-items: stretch;
  gap: 14px;
  max-width: 880px;
  margin: 30px auto 0;
}

#growth-summary .summary-chip,
.summary-chip {
  display: inline-flex;
  align-items: center;
  gap: 11px;
  padding: 8px 20px 8px 8px;
  border-radius: var(--r-pill);
  border: 1px solid var(--line);
  background: var(--surface);
  box-shadow: var(--shadow-sm);
}

.summary-chip > :first-child {
  width: 40px;
  height: 40px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  font-size: 19px;
  line-height: 1;
}

.summary-chip:nth-of-type(3n+1) > :first-child { background: color-mix(in srgb, var(--c-primary-soft) 60%, transparent); }
.summary-chip:nth-of-type(3n+2) > :first-child { background: color-mix(in srgb, var(--c-sky) 58%, transparent); }
.summary-chip:nth-of-type(3n)   > :first-child { background: color-mix(in srgb, var(--c-mint) 62%, transparent); }

.summary-label {
  font-size: var(--fs-xs);
  font-weight: 700;
  color: var(--ink-2);
}

.summary-value {
  font-size: var(--fs-lg);
  font-weight: 800;
  color: var(--ink-1);
  font-variant-numeric: tabular-nums;
}

/* --------------------------------------------------------------------------
   7. 时光信箱（信封卡：三角盖 flap + 🍡 火漆封印；
      locked 降饱和盖合，open 掀盖展开横线信纸；整卡交替微旋转）
   -------------------------------------------------------------------------- */
#mailbox-list {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(min(300px, 100%), 1fr));
  gap: 30px 26px;
  max-width: 1000px;
  margin-inline: auto;
  padding-top: 14px;
}

.letter-card {
  position: relative;
  padding: 64px 22px 24px;
  border-radius: var(--r-md);
  border: 1px solid var(--line);
  background: var(--surface);
  box-shadow: var(--shadow-md);
  animation: fade-up var(--t-base) var(--ease-out) backwards;
  transition: transform var(--t-base) var(--ease-out),
              box-shadow var(--t-base) var(--ease-out),
              filter var(--t-base) var(--ease-out);
}

.letter-card:nth-child(odd)  { transform: rotate(-1.1deg); }
.letter-card:nth-child(even) { transform: rotate(1.1deg); }
.letter-card:nth-child(2)    { animation-delay: var(--stagger); }
.letter-card:nth-child(3)    { animation-delay: calc(var(--stagger) * 2); }

@media (hover: hover) {
  .letter-card:hover {
    transform: rotate(0deg) translateY(-5px);
    box-shadow: var(--shadow-lg);
  }
}

/* 信封口盖：顶部三角，open 时向上掀开 */
.letter-flap {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 58px;
  z-index: 2;
  clip-path: polygon(0 0, 100% 0, 50% 100%);
  background: linear-gradient(180deg,
              color-mix(in srgb, var(--c-primary-soft) 72%, var(--surface)),
              color-mix(in srgb, var(--c-primary-soft) 46%, var(--surface)));
  transform-origin: top center;
  transition: transform var(--t-med) var(--ease-spring),
              filter var(--t-med) var(--ease-out);
}

.letter-card.open .letter-flap {
  transform: perspective(640px) rotateX(180deg);
  filter: brightness(.96) saturate(.75);
}

/* 火漆封印 🍡 */
.letter-seal {
  position: absolute;
  top: 34px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 3;
  width: 44px;
  height: 44px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  font-size: 20px;
  line-height: 1;
  background: radial-gradient(circle at 34% 28%,
              color-mix(in srgb, var(--c-primary) 86%, var(--surface)),
              color-mix(in srgb, var(--c-primary-strong) 78%, var(--c-primary)));
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--c-primary-strong) 42%, transparent),
              var(--shadow-md);
}

.letter-title {
  position: relative;
  z-index: 1;
  font-family: var(--font-round);
  font-size: var(--fs-lg);
  font-weight: 800;
  color: var(--ink-1);
}

.letter-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 14px;
  margin-top: 6px;
  font-size: var(--fs-xs);
  font-weight: 700;
  color: var(--ink-2);           /* 启封日等关键信息不用 --ink-3 */
  font-variant-numeric: tabular-nums;
}

/* 信纸正文：open 才展开横线纹理 */
.letter-body {
  position: relative;
  z-index: 1;
  margin-top: 14px;
  padding: 14px 16px;
  border-radius: var(--r-sm);
  font-size: var(--fs-sm);
  line-height: 28px;             /* 与横线周期一致 */
  color: var(--ink-1);
  white-space: pre-wrap;
  overflow-wrap: break-word;
  background:
    repeating-linear-gradient(180deg,
      transparent 0 27px,
      color-mix(in srgb, var(--c-primary-soft) 58%, transparent) 27px 28px),
    color-mix(in srgb, var(--surface-2) 65%, var(--surface));
}

#mailbox-list .letter-card.locked,
.letter-card.locked {
  cursor: not-allowed;
  filter: saturate(.5) opacity(.94);
}

.letter-card.locked .letter-body {
  display: none;                 /* 未启封不显示正文（JS 会给 aria 提示） */
}

.letter-card.open .letter-body {
  animation: fade-up var(--t-base) var(--ease-out) backwards;
}

/* --------------------------------------------------------------------------
   8. 关于页 · 家族卡（.fam-* 前缀，全部只用令牌）
   -------------------------------------------------------------------------- */
.fam-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
  gap: 18px;
  max-width: 900px;
  margin-inline: auto;
}

.fam-card {
  padding: 24px 14px 20px;
  border-radius: var(--r-lg);
  border: 1px solid var(--line);
  background: var(--surface);
  box-shadow: var(--shadow-sm);
  text-align: center;
  animation: fade-up var(--t-base) var(--ease-out) backwards;
  transition: transform var(--t-base) var(--ease-out),
              box-shadow var(--t-base) var(--ease-out);
}

.fam-card:nth-child(2) { animation-delay: var(--stagger); }
.fam-card:nth-child(3) { animation-delay: calc(var(--stagger) * 2); }
.fam-card:nth-child(4) { animation-delay: calc(var(--stagger) * 3); }
.fam-card:nth-child(5) { animation-delay: calc(var(--stagger) * 4); }

@media (hover: hover) {
  .fam-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
  }
}

.fam-avatar {
  width: 62px;
  height: 62px;
  margin: 0 auto 10px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  font-size: 28px;
  line-height: 1;
  box-shadow: inset 0 0 0 3px var(--surface);
}

.fam-card:nth-child(5n+1) .fam-avatar { background: color-mix(in srgb, var(--c-primary-soft) 66%, transparent); }
.fam-card:nth-child(5n+2) .fam-avatar { background: color-mix(in srgb, var(--c-sky) 62%, transparent); }
.fam-card:nth-child(5n+3) .fam-avatar { background: color-mix(in srgb, var(--c-sun) 66%, transparent); }
.fam-card:nth-child(5n+4) .fam-avatar { background: color-mix(in srgb, var(--c-mint) 66%, transparent); }
.fam-card:nth-child(5n+5) .fam-avatar { background: color-mix(in srgb, var(--c-lilac) 55%, transparent); }

.fam-name {
  font-family: var(--font-round);
  font-size: var(--fs-md);
  font-weight: 800;
  color: var(--ink-1);
}

.fam-role {
  margin-top: 2px;
  font-size: var(--fs-xs);
  font-weight: 700;
  color: var(--c-primary-strong);
}

.fam-quote {
  margin-top: 8px;
  font-size: var(--fs-xs);
  line-height: 1.7;
  color: var(--ink-2);
}

/* ═══════════════════════════════════════════════════════════════
   【三期 round-12】轮播 v2：真·拍立得相纸 + 胶带 + 自动播放进度点 + 计数角标
   （追加覆盖层，不改写上方一期规则）
   ═══════════════════════════════════════════════════════════════ */

/* 相纸化：白底厚边框，奇偶交替微倾 */
.carousel-slide {
  background: var(--surface);
  border-color: color-mix(in srgb, var(--line) 70%, transparent);
  padding: 14px 14px 16px;
}
.carousel-slide:nth-child(odd)  { --tilt: -1.2deg; transform: rotate(var(--tilt)); }
.carousel-slide:nth-child(even) { --tilt: 1.1deg;  transform: rotate(var(--tilt)); }

/* 顶部胶带 */
.carousel-slide::before {
  content: "";
  position: absolute;
  top: -11px;
  left: 50%;
  width: 96px;
  height: 22px;
  transform: translateX(-50%) rotate(-3deg);
  border-radius: 3px;
  background: color-mix(in srgb, var(--c-sun) 55%, transparent);
  box-shadow: var(--shadow-sm);
  z-index: 2;
}

/* 内嵌相片窗：固定比例，图片/emoji 都装进「相纸」里 */
.carousel-slide .slide-art {
  position: relative;
  width: 100%;
  aspect-ratio: 4 / 3;
  display: grid;
  place-items: center;
  font-size: clamp(56px, 15vw, 84px);
  line-height: 1.15;
  border-radius: var(--r-xs);
  overflow: hidden;
  background:
    linear-gradient(155deg,
      color-mix(in srgb, var(--c-primary-soft) 40%, var(--surface)),
      color-mix(in srgb, var(--c-sky) 30%, var(--surface)));
  box-shadow: inset 0 0 0 1px color-mix(in srgb, var(--line) 60%, transparent);
}

@media (hover: hover) {
  .carousel-slide:hover {
    transform: rotate(0deg) translateY(-4px);
    box-shadow: var(--shadow-lg);
  }
}

/* 进度圆点：active 变长胶囊；自动播放时从左往右充能 */
.carousel-dots[data-auto="1"] .carousel-dot.active::before {
  background:
    linear-gradient(90deg,
      var(--c-primary-strong),
      var(--c-primary)) no-repeat,
    color-mix(in srgb, var(--ink-3) 38%, transparent);
  background-size: 0% 100%;
  animation: dot-fill var(--auto-ms, 5000ms) linear forwards;
}
@keyframes dot-fill { to { background-size: 100% 100%; } }

/* hover 暂停轮播时，进度同步暂停（与 JS 的 hoverPause 对齐） */
.carousel-section:hover .carousel-dots[data-auto="1"] .carousel-dot.active::before {
  animation-play-state: paused;
}

@media (prefers-reduced-motion: reduce) {
  .carousel-dots[data-auto="1"] .carousel-dot.active::before {
    animation: none;
    background-size: 100% 100%;
  }
}

/* 计数角标（JS 生成 .carousel-count） */
.carousel-count {
  position: absolute;
  top: 26px;
  right: max(18px, 3vw);
  z-index: 6;
  padding: 4px 12px;
  border-radius: var(--r-pill);
  background: color-mix(in srgb, var(--surface) 88%, transparent);
  -webkit-backdrop-filter: blur(6px);
  backdrop-filter: blur(6px);
  box-shadow: var(--shadow-sm);
  font-size: 12px;
  font-weight: 800;
  color: var(--ink-2);
  font-variant-numeric: tabular-nums;
}

/* 【三期 round-16 回归修复】tzIn 终帧 transform:none 会抹平相纸静态倾斜——
   为轮播幻灯定制入场动画，终帧落在 rotate(var(--tilt)) 上 */
@keyframes slide-tilt-in {
  from { opacity: 0; transform: translateY(26px); }
  to   { opacity: 1; transform: rotate(var(--tilt, 0deg)); }
}
#carousel .carousel-slide { animation-name: slide-tilt-in; }

/* ═══════════════════════════════════════════════════════════════
   【三期 round-13】板块头部装饰体系 ＋ 分区「钉扣」徽章 ＋ 标题入场编排
   ═══════════════════════════════════════════════════════════════ */

/* ── 分区钉扣：每块顶部中央一枚白底小圆牌，别着本区主题 emoji ── */
#carousel, #timeline, #gallery,
#milestones, #growth, #mailbox, .tz-wish {
  position: relative;
}
#carousel::before, #timeline::before, #gallery::before,
#milestones::before, #growth::before, #mailbox::before, .tz-wish::before {
  content: "⭐";
  position: absolute;
  top: -16px;
  left: 50%;
  transform: translateX(-50%);
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--surface);
  display: grid;
  place-items: center;
  font-size: 16px;
  line-height: 1;
  box-shadow: var(--shadow-md), var(--ring);
  z-index: 3;
}
#carousel::before   { content: "📸"; }
#timeline::before   { content: "📅"; }
#gallery::before    { content: "🖼️"; }
#milestones::before { content: "🏆"; }
#growth::before     { content: "📊"; }
#mailbox::before    { content: "💌"; }

/* ── 标题手绘波浪线（糖果粉，data-URI 自托管）── */
.section-title {
  position: relative;
  display: inline-block;
  padding-bottom: 12px;
}
.section-title::after {
  content: "";
  position: absolute;
  left: 50%;
  bottom: 0;
  transform: translateX(-50%);
  width: min(132px, 46vw);
  height: 8px;
  background: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 112 8'%3E%3Cpath d='M2 5 Q 9 1 16 5 T 30 5 T 44 5 T 58 5 T 72 5 T 86 5 T 100 5 L 110 4' fill='none' stroke='%23ff8fab' stroke-width='2.6' stroke-linecap='round' opacity='.9'/%3E%3C/svg%3E") no-repeat center / contain;
}

/* ── 标题入场编排：JS 挂 hdr-armed → 视口内挂 hdr-in ── */
.section-header.hdr-armed .section-eyebrow,
.section-header.hdr-armed .section-title,
.section-header.hdr-armed .section-subtitle {
  opacity: 0;
  transform: translateY(14px);
}
.section-header.hdr-armed .section-title   { transition-delay: .08s; }
.section-header.hdr-armed .section-subtitle { transition-delay: .16s; }
.section-header.hdr-armed .section-eyebrow,
.section-header.hdr-armed .section-title,
.section-header.hdr-armed .section-subtitle {
  transition: opacity .55s var(--ease-out), transform .55s var(--ease-out);
}
.section-header.hdr-in .section-eyebrow,
.section-header.hdr-in .section-title,
.section-header.hdr-in .section-subtitle {
  opacity: 1;
  transform: none;
}

@media (max-width: 420px) {
  #carousel::before, #timeline::before, #gallery::before,
  #milestones::before, #growth::before, #mailbox::before, .tz-wish::before {
    width: 30px;
    height: 30px;
    top: -13px;
    font-size: 13px;
  }
}
@media print {
  #carousel::before, #timeline::before, #gallery::before,
  #milestones::before, #growth::before, #mailbox::before, .tz-wish::before {
    display: none;   /* 钉扣是屏幕装饰，不入纪念册 */
  }
}