/* ==========================================================================
   团子的成长日记 🍡 · layout.css
   视觉工程组
   —— 滚动进度条 / 悬浮胶囊导航(含移动端抽屉) / Hero(云浪+色块+头像+芯片+CTA) /
      灯箱 / FAB 三钮列 / 页脚(云朵波浪+夜灯深可可底) / night 星空氛围落位
   颜色纪律：只用 var() / color-mix(var())；hover 全部包 @media (hover:hover)。
   ========================================================================== */

/* --------------------------------------------------------------------------
   1. 顶部滚动进度条（transform: scaleX 由 JS 逐帧控制，禁止加 transition）
   -------------------------------------------------------------------------- */
#scroll-progress,
.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  z-index: var(--z-progress);
  background: linear-gradient(90deg,
              color-mix(in srgb, var(--c-primary) 92%, transparent),
              color-mix(in srgb, var(--c-sun-strong) 88%, transparent));
  transform-origin: 0 50%;
  transform: scaleX(0);
  pointer-events: none;
}

/* --------------------------------------------------------------------------
   2. 悬浮胶囊导航
   -------------------------------------------------------------------------- */
.navbar {
  position: fixed;
  top: calc(env(safe-area-inset-top, 0px) + 12px);
  left: 16px;
  right: 16px;
  z-index: var(--z-nav);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  min-height: var(--nav-h);
  padding: 6px 10px 6px 18px;
  border-radius: var(--r-pill);
  border: 1px solid color-mix(in srgb, var(--line) 70%, transparent);
  background: color-mix(in srgb, var(--surface) 85%, transparent);
  -webkit-backdrop-filter: blur(14px) saturate(1.5);
  backdrop-filter: blur(14px) saturate(1.5);
  box-shadow: var(--shadow-sm);
  transition: box-shadow var(--t-base) var(--ease-out),
              background-color var(--t-base) var(--ease-out);
}

/* 滚动后：JS 加 .scrolled → 投影加深、底色更实 */
.navbar.scrolled {
  background: color-mix(in srgb, var(--surface) 94%, transparent);
  box-shadow: var(--shadow-lg);
}

.nav-brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-round);
  font-size: var(--fs-lg);
  font-weight: 800;
  color: var(--ink-1);
  white-space: nowrap;
}

/* 品牌 🍡 的 28px 圆形彩底托（沿用旧版类名，页面组直接复用） */
.nav-icon,
.brand-dot {
  width: 28px;
  height: 28px;
  flex: none;
  display: inline-grid;
  place-items: center;
  border-radius: 50%;
  font-size: 15px;
  line-height: 1;
  background: linear-gradient(135deg,
              color-mix(in srgb, var(--c-primary) 32%, var(--surface)),
              color-mix(in srgb, var(--c-sky) 34%, var(--surface)));
  box-shadow: var(--shadow-sm);
}

/* 桌面端链接列 */
.nav-links {
  display: flex;
  align-items: center;
  gap: 4px;
}

.nav-link {
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  min-height: 44px;
  padding: 8px 16px;
  border-radius: var(--r-pill);
  color: var(--ink-2);
  font-size: var(--fs-sm);
  font-weight: 700;
  white-space: nowrap;
  transition: background-color var(--t-fast) var(--ease-out),
              color var(--t-fast) var(--ease-out);
}

/* active 前置的 6px 圆点 */
.nav-link::before {
  content: "";
  width: 6px;
  height: 6px;
  flex: none;
  border-radius: 50%;
  background: var(--c-primary-strong);
  transform: scale(0);
  transition: transform var(--t-fast) var(--ease-spring);
}

.nav-link.active {
  background: color-mix(in srgb, var(--c-primary-soft) 55%, transparent);
  color: var(--c-primary-strong);
}

.nav-link.active::before {
  transform: scale(1);
}

@media (hover: hover) {
  .nav-link:hover {
    background: color-mix(in srgb, var(--surface-2) 85%, transparent);
    color: var(--ink-1);
  }
}

/* 汉堡按钮（aria-expanded 样式联动） */
.nav-menu-btn {
  display: none;
  width: 44px;
  height: 44px;
  flex: none;
  place-items: center;
  border-radius: 50%;
  font-size: 20px;
  color: var(--c-primary-strong);
  transition: background-color var(--t-fast) var(--ease-out),
              transform var(--t-fast) var(--ease-out);
}

.nav-menu-btn[aria-expanded="true"] {
  background: color-mix(in srgb, var(--c-primary-soft) 60%, transparent);
  transform: rotate(90deg);
}

@media (hover: hover) {
  .nav-menu-btn:hover {
    background: color-mix(in srgb, var(--c-primary-soft) 40%, transparent);
  }
}

/* 移动端抽屉面板（--r-lg + safe-area） */
@media (max-width: 860px) {
  .navbar {
    padding-left: 14px;
    padding-right: 8px;
  }

  .nav-brand { font-size: var(--fs-md); }
  .nav-links { max-width: 46vw; overflow: hidden; } /* 品牌名过长时不挤压按钮 */

  .nav-menu-btn { display: inline-grid; }

  .nav-links {
    position: fixed;
    top: calc(env(safe-area-inset-top, 0px) + var(--nav-h) + 22px);
    left: 16px;
    right: 16px;
    z-index: calc(var(--z-nav) - 1);
    flex-direction: column;
    align-items: stretch;
    gap: 4px;
    max-width: none;
    padding: 12px;
    border: 1px solid var(--line);
    border-radius: var(--r-lg);
    background: color-mix(in srgb, var(--surface) 94%, transparent);
    -webkit-backdrop-filter: blur(18px);
    backdrop-filter: blur(18px);
    box-shadow: var(--shadow-xl);
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transform: translateY(-10px) scale(.98);
    transform-origin: top center;
    transition: opacity var(--t-base) var(--ease-out),
                transform var(--t-base) var(--ease-out),
                visibility 0s linear var(--t-base);
    overflow: visible;
  }

  /* JS 开抽屉时挂 .open（兼容旧版习惯 .active），或 aria-expanded 同步 */
  .nav-links.open,
  .nav-links.active {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
    transform: none;
    transition-delay: 0s;
  }

  .nav-link {
    min-height: 46px;
    justify-content: flex-start;
    padding-inline: 16px;
  }
}

/* --------------------------------------------------------------------------
   3. Hero
   -------------------------------------------------------------------------- */
.hero {
  position: relative;
  overflow: hidden;
  overflow: clip;
  min-height: 100vh;      /* 老内核兜底 */
  min-height: 100svh;     /* iOS 动态视口 */
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: calc(var(--nav-h) + 76px) 20px 120px;
  background: linear-gradient(180deg,
              color-mix(in srgb, var(--c-primary-soft) 26%, var(--bg)) 0%,
              color-mix(in srgb, var(--surface-3) 30%, var(--bg)) 62%,
              var(--bg) 100%);
}

/* 内容层抬到云浪之上 */
.hero > :not(.hero-blob):not(.hero-blobs):not(.stars) {
  position: relative;
  z-index: 3;
}

/* 兼容页面组把三枚色块包进容器的情况 */
.hero-blobs {
  position: absolute;
  inset: 0;
  z-index: 0;
  pointer-events: none;
}

/* 三枚漂移色块（柔光渐变圆，环境级缓漂 ≤8px + 微呼吸） */
.hero-blob {
  position: absolute;
  z-index: 0;
  border-radius: 50%;
  pointer-events: none;
  will-change: transform;
}

.hero-blob.b1 {
  top: 6%;
  left: clamp(-140px, calc(50% - 590px), 8%);
  width: clamp(260px, 38vw, 430px);
  aspect-ratio: 1;
  background: radial-gradient(circle at 35% 35%,
              color-mix(in srgb, var(--c-primary) 44%, transparent),
              transparent 70%);
  animation: blob-wander-a var(--t-wander) ease-in-out infinite alternate;
}

.hero-blob.b2 {
  top: 30%;
  right: clamp(-150px, calc(50% - 600px), 6%);
  width: clamp(280px, 42vw, 480px);
  aspect-ratio: 1;
  background: radial-gradient(circle at 60% 30%,
              color-mix(in srgb, var(--c-lilac) 48%, transparent),
              transparent 72%);
  animation: blob-wander-b var(--t-wander-slow) ease-in-out infinite alternate;
}

.hero-blob.b3 {
  bottom: -6%;
  left: 24%;
  width: clamp(220px, 34vw, 400px);
  aspect-ratio: 1;
  background: radial-gradient(circle at 50% 45%,
              color-mix(in srgb, var(--c-sky) 52%, transparent),
              transparent 74%);
  animation: blob-wander-c var(--t-wander-slower) ease-in-out infinite alternate;
}

@keyframes blob-wander-a {
  0%   { transform: translate(0, 0) scale(1); }
  100% { transform: translate(-8px, 6px) scale(1.05); }
}

@keyframes blob-wander-b {
  0%   { transform: translate(0, 0) scale(1); }
  100% { transform: translate(7px, -6px) scale(.96); }
}

@keyframes blob-wander-c {
  0%   { transform: translate(0, 0) scale(1); }
  100% { transform: translate(-6px, -7px) scale(1.04); }
}

/* 两层 SVG 云朵波浪剪影（mask 只含几何，颜色来自变量）：
   中层雾紫云带 + 底层与下一节同色的衔接云带，横向无缝缓漂 */
.hero::before,
.hero::after {
  content: "";
  position: absolute;
  left: -50%;
  width: 200%;
  bottom: 0;
  z-index: 1;
  pointer-events: none;
  will-change: transform;
  -webkit-mask-image: var(--mask-clouds);
  mask-image: var(--mask-clouds);
  -webkit-mask-repeat: repeat-x;
  mask-repeat: repeat-x;
  -webkit-mask-position: 0 100%;
  mask-position: 0 100%;
}

.hero::before {
  height: 128px;
  margin-bottom: 40px;
  background: color-mix(in srgb, var(--c-lilac) 34%, transparent);
  -webkit-mask-size: 620px 100%;
  mask-size: 620px 100%;
  animation: wave-drift-l var(--t-drift) linear infinite;
}

.hero::after {
  height: 148px;
  background: var(--bg);
  -webkit-mask-size: 500px 100%;
  mask-size: 500px 100%;
  animation: wave-drift-r var(--t-drift-slow) linear infinite;
}

/* 平移一个贴片宽度即无缝循环（GPU 合成层动画） */
@keyframes wave-drift-l { to { transform: translateX(-620px); } }
@keyframes wave-drift-r { to { transform: translateX(500px); } }

/* Hero 星空容器层级（night 才显示，规则在 base.css） */
.hero .stars { z-index: 2; }

/* 头像：白底圆框 🍡（.avatar img 存在则自动盖住 emoji） */
.avatar-wrap {
  position: relative;
  width: clamp(124px, 30vw, 152px);
  aspect-ratio: 1;
  margin-bottom: 22px;
  animation: float-y var(--t-float) ease-in-out infinite;
}

/* 光环底晕（随头像一起缓浮） */
.avatar-wrap::before {
  content: "";
  position: absolute;
  inset: -18px;
  border-radius: 50%;
  background: radial-gradient(circle,
              color-mix(in srgb, var(--c-primary-soft) 65%, transparent) 0%,
              transparent 68%);
  z-index: -1;
}

.avatar {
  width: 100%;
  height: 100%;
  display: grid;
  place-items: center;
  overflow: hidden;
  border-radius: 50%;
  border: 6px solid var(--surface);
  background: var(--surface);
  box-shadow: var(--ring), var(--shadow-lg);
  font-size: clamp(56px, 14vw, 72px);
  line-height: 1;
}

.avatar img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: 50%;
}

.hero-title {
  position: relative;
  font-family: var(--font-round);
  font-size: var(--fs-hero);
  letter-spacing: .04em;
  color: var(--ink-1);
}

/* 标题后方一枚 --c-sun-strong 手绘星星装饰 */
.hero-title::after {
  content: "★";
  position: absolute;
  top: -.28em;
  right: -.62em;
  font-size: .42em;
  color: var(--c-sun-strong);
  transform: rotate(14deg);
  animation: star-sway var(--t-float-alt) ease-in-out infinite alternate;
}

@keyframes star-sway {
  from { transform: rotate(8deg) translateY(0); }
  to   { transform: rotate(22deg) translateY(-4px); }
}

.hero-subtitle {
  margin-top: 6px;
  font-family: var(--font-round);
  font-size: var(--fs-xl);
  font-weight: 700;
  color: var(--ink-2);
}

/* 生日丝带 pill（--c-primary-soft 底 + 两侧燕尾飘带） */
.hero-birthday {
  position: relative;
  display: inline-flex;
  align-items: center;
  min-height: 40px;
  margin-top: 16px;
  padding: 7px 26px;
  border-radius: var(--r-pill);
  background: var(--c-primary-soft);
  color: var(--ink-1);
  font-weight: 800;
  font-size: var(--fs-sm);
  box-shadow: var(--shadow-md);
}

.hero-birthday::before,
.hero-birthday::after {
  content: "";
  position: absolute;
  top: 6px;
  bottom: 6px;
  width: 18px;
  z-index: -1;
  background: color-mix(in srgb, var(--c-primary-strong) 62%, var(--c-primary-soft));
}

.hero-birthday::before {
  left: -10px;
  clip-path: polygon(0 0, 100% 0, 100% 100%, 0 100%, 32% 50%);
}

.hero-birthday::after {
  right: -10px;
  clip-path: polygon(0 0, 100% 0, 68% 50%, 100% 100%, 0 100%);
}

/* 年龄统计芯片：移动端也保持横排一行 */
.hero-stats {
  display: flex;
  flex-wrap: wrap;               /* 极窄屏兜底换行，绝不横向滚动 */
  justify-content: center;
  align-items: stretch;
  gap: 10px;
  margin-top: 24px;
}

.stat-chip {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  padding: 7px 16px 7px 7px;
  border-radius: var(--r-pill);
  background: var(--surface);
  border: 1px solid var(--line);
  box-shadow: var(--shadow-sm);
  text-align: left;
}

.stat-icon {
  width: 36px;
  height: 36px;
  flex: none;
  display: grid;
  place-items: center;
  border-radius: 50%;
  font-size: 17px;
  line-height: 1;
}

/* 图标彩座轮换：粉 / 天蓝 / 奶油黄 */
.stat-chip:nth-of-type(3n+1) .stat-icon { background: color-mix(in srgb, var(--c-primary-soft) 62%, transparent); }
.stat-chip:nth-of-type(3n+2) .stat-icon { background: color-mix(in srgb, var(--c-sky) 58%, transparent); }
.stat-chip:nth-of-type(3n)   .stat-icon { background: color-mix(in srgb, var(--c-sun) 62%, transparent); }

.stat-number,
#days-count,
#weeks-count,
#months-count {
  font-size: 28px;
  font-weight: 800;
  line-height: 1.2;
  color: var(--ink-1);
  font-variant-numeric: tabular-nums;
}

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

@media (max-width: 420px) {
  .hero-stats { gap: 7px; }
  .stat-chip { padding: 6px 12px 6px 6px; gap: 7px; }
  .stat-icon { width: 30px; height: 30px; font-size: 14px; }
  .stat-number, #days-count, #weeks-count, #months-count { font-size: 21px; }
}

/* 周岁倒计时芯片（JS 渲染文本） */
#birthday-chip {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  min-height: 40px;
  margin-top: 14px;
  padding: 7px 18px;
  border-radius: var(--r-pill);
  border: 1.5px dashed color-mix(in srgb, var(--c-sun-strong) 75%, transparent);
  background: color-mix(in srgb, var(--c-sun) 30%, var(--surface));
  color: var(--ink-1);
  font-size: var(--fs-sm);
  font-weight: 700;
  box-shadow: var(--shadow-sm);
}

/* CTA 双按钮 */
.hero-actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 14px;
  margin-top: 28px;
}

/* 向下滚动提示（若页面组保留旧元素则自动有样式） */
.scroll-hint {
  position: absolute;
  bottom: 86px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 3;
  color: var(--ink-2);
  font-size: var(--fs-xs);
  animation: float-y var(--t-float-alt) ease-in-out infinite;
}

/* --------------------------------------------------------------------------
   4. 灯箱 #lightbox（暖色深遮罩，双主题皆由令牌混合而成）
   -------------------------------------------------------------------------- */
#lightbox {
  position: fixed;
  inset: 0;
  z-index: var(--z-lightbox);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  padding-bottom: calc(20px + env(safe-area-inset-bottom, 0px));
  background: color-mix(in srgb, var(--ink-1) 82%, transparent);
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--t-base) var(--ease-out),
              visibility 0s linear var(--t-base);
}

#lightbox.active,
#lightbox[aria-hidden="false"] {
  opacity: 1;
  visibility: visible;
  transition-delay: 0s;
}

.lb-stage {
  position: relative;
  width: min(92vw, 880px);
  text-align: center;
}

.lb-img {
  display: grid;
  place-items: center;
  max-width: 100%;
  max-height: 68vh;
  min-height: 240px;
  margin-inline: auto;
  border-radius: var(--r-lg);
  background: var(--surface);
  box-shadow: var(--shadow-xl);
  object-fit: contain;
  font-size: clamp(88px, 22vw, 140px);
  line-height: 1.2;
}

.lb-caption {
  margin-top: 16px;
  font-family: var(--font-round);
  font-size: var(--fs-xl);
  font-weight: 800;
  color: var(--on-scrim);
}

.lb-count {
  margin-top: 4px;
  font-size: var(--fs-sm);
  font-variant-numeric: tabular-nums;
  color: var(--on-scrim);
  opacity: .82;
}

.lb-close,
.lb-prev,
.lb-next {
  position: absolute;
  width: 46px;
  height: 46px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  border: 1px solid color-mix(in srgb, var(--on-scrim) 32%, transparent);
  background: color-mix(in srgb, var(--ink-1) 30%, transparent);
  -webkit-backdrop-filter: blur(8px);
  backdrop-filter: blur(8px);
  color: var(--on-scrim);
  font-size: 20px;
  transition: background-color var(--t-fast) var(--ease-out),
              transform var(--t-fast) var(--ease-out);
}

.lb-close { top: max(14px, env(safe-area-inset-top, 0px)); right: max(14px, env(safe-area-inset-right, 0px)); }
.lb-prev   { top: 50%; left: max(6px, env(safe-area-inset-left, 0px)); transform: translateY(-50%); }
.lb-next   { top: 50%; right: max(6px, env(safe-area-inset-right, 0px)); transform: translateY(-50%); }

@media (hover: hover) {
  .lb-close:hover, .lb-prev:hover, .lb-next:hover {
    background: color-mix(in srgb, var(--c-primary) 55%, transparent);
  }
  .lb-prev:hover { transform: translateY(-50%) scale(1.06); }
  .lb-next:hover { transform: translateY(-50%) scale(1.06); }
}

/* 圆形控件焦点改用 --ring 光环描边（全局 2px 外描边之外的补充形态） */
.lb-close:focus-visible, .lb-prev:focus-visible, .lb-next:focus-visible,
.fab:focus-visible, .nav-menu-btn:focus-visible, .carousel-dot:focus-visible,
.carousel-btn:focus-visible, .footer-link:focus-visible, .avatar:focus-visible {
  outline: none;
  box-shadow: var(--ring);
}

/* --------------------------------------------------------------------------
   5. 右下角 FAB 三钮列（自下而上：回到顶部 → 主题 → 音乐）
   -------------------------------------------------------------------------- */
#fab-stack {
  position: fixed;
  right: calc(14px + env(safe-area-inset-right, 0px));
  bottom: calc(14px + env(safe-area-inset-bottom, 0px));
  z-index: var(--z-fab);
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.fab {
  width: 52px;
  height: 52px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  border: 1px solid var(--line);
  background: color-mix(in srgb, var(--surface) 88%, transparent);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
  font-size: 22px;
  line-height: 1;
  transition: transform var(--t-fast) var(--ease-spring),
              box-shadow var(--t-base) var(--ease-out),
              background-color var(--t-base) var(--ease-out);
}

/* 彩色图标底托以光环形式呈现（emoji 直接做按钮内容时依然成立） */
#fab-music    { box-shadow: var(--shadow-md), 0 0 0 3px color-mix(in srgb, var(--c-mint) 55%, transparent); }
#fab-theme    { box-shadow: var(--shadow-md), 0 0 0 3px color-mix(in srgb, var(--c-sun-strong) 45%, transparent); }
#back-to-top,
.back-to-top  { box-shadow: var(--shadow-md), 0 0 0 3px color-mix(in srgb, var(--c-primary-soft) 62%, transparent); }

/* 回到顶部：默认隐藏，JS 加 .visible（兼容 .show）后出现 */
#back-to-top,
.back-to-top {
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transform: translateY(10px);
  transition: opacity var(--t-base) var(--ease-out),
              transform var(--t-base) var(--ease-out),
              visibility 0s linear var(--t-base);
}

#back-to-top.visible, #back-to-top.show,
.back-to-top.visible, .back-to-top.show {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
  transform: none;
  transition-delay: 0s;
}

@media (hover: hover) {
  .fab:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-lg);
  }
  #fab-music:hover    { box-shadow: var(--shadow-lg), 0 0 0 3px color-mix(in srgb, var(--c-mint) 55%, transparent); }
  #fab-theme:hover    { box-shadow: var(--shadow-lg), 0 0 0 3px color-mix(in srgb, var(--c-sun-strong) 45%, transparent); }
  #back-to-top:hover, .back-to-top:hover {
    box-shadow: var(--shadow-lg), 0 0 0 3px color-mix(in srgb, var(--c-primary-soft) 62%, transparent);
  }
}

.fab:active {
  transform: scale(.93);
}

/* --------------------------------------------------------------------------
   6. 页脚：顶部 SVG 云朵波浪衔接上一节；夜灯 = 深可可底 + 星点
   -------------------------------------------------------------------------- */
.footer,
.site-footer {
  --fb: color-mix(in srgb, var(--c-lilac) 16%, var(--surface-2));
  position: relative;
  padding: 118px 20px calc(34px + env(safe-area-inset-bottom, 0px));
  color: var(--ink-2);
  text-align: center;
}

html[data-theme="night"] .footer,
html[data-theme="night"] .site-footer {
  --fb: var(--bg); /* 夜灯：深可可夜灯底 */
}

/* 云朵上缘（剪影翻转朝上）+ 实底身体，拼成完整云边页脚 */
.footer::before,
.site-footer::before {
  content: "";
  position: absolute;
  top: 0;
  left: -50%;
  width: 200%;
  height: 96px;
  pointer-events: none;
  background: var(--fb);
  -webkit-mask-image: var(--mask-clouds);
  mask-image: var(--mask-clouds);
  -webkit-mask-size: 560px 100%;
  mask-size: 560px 100%;
  -webkit-mask-repeat: repeat-x;
  mask-repeat: repeat-x;
  transform: scaleY(-1);
  will-change: transform;
  animation: footer-wave var(--t-drift-slow) linear infinite;
}

.footer::after,
.site-footer::after {
  content: "";
  position: absolute;
  top: 92px;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 0;
  background: var(--fb);
}

@keyframes footer-wave { to { transform: scaleY(-1) translateX(-560px); } }

.footer > *,
.site-footer > * {
  position: relative;
  z-index: 1;
}

.footer-brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-round);
  font-size: var(--fs-xl);
  font-weight: 800;
  color: var(--ink-1);
}

.footer-icon {
  width: 30px;
  height: 30px;
  display: inline-grid;
  place-items: center;
  border-radius: 50%;
  font-size: 16px;
  background: linear-gradient(135deg,
              color-mix(in srgb, var(--c-primary) 32%, var(--surface)),
              color-mix(in srgb, var(--c-sun) 40%, var(--surface)));
  box-shadow: var(--shadow-sm);
}

.footer-text {
  margin-top: 8px;
  font-size: var(--fs-sm);
  color: var(--ink-2);
}

.footer-links {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 18px;
}

/* 40px 视觉圆底座 + ::after 外扩至 48px 有效触达 */
.footer-link {
  position: relative;
  width: 40px;
  height: 40px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  border: 1px solid var(--line);
  background: color-mix(in srgb, var(--surface) 78%, transparent);
  box-shadow: var(--shadow-sm);
  font-size: 17px;
  color: var(--ink-1);
  transition: background-color var(--t-fast) var(--ease-out),
              transform var(--t-fast) var(--ease-spring);
}

.footer-link::after {
  content: "";
  position: absolute;
  inset: -4px;          /* 40px → 48px 命中区 */
  border-radius: 50%;
}

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

@media (hover: hover) {
  .footer-link:hover {
    background: color-mix(in srgb, var(--c-primary-soft) 65%, transparent);
    transform: translateY(-3px);
  }
}

.footer-copyright {
  margin-top: 18px;
  font-size: var(--fs-xs);
  color: var(--ink-3); /* 装饰性短标注用途，符合 §8 */
}

/* 页脚星空（仅 night 可见，见 base.css .stars） */
.footer .stars,
.site-footer .stars {
  z-index: 1;
}

/* ═══════════════════════════════════════════════════════════════
   【三期 round-14】导航精修 · 滑动墨条（活动指示条）
   ═══════════════════════════════════════════════════════════════ */

/* 滚动后玻璃更透、边界更清晰 */
.navbar.scrolled {
  background: color-mix(in srgb, var(--surface) 82%, transparent);
  border-color: color-mix(in srgb, var(--line) 85%, transparent);
  box-shadow: var(--shadow-md);
}
@supports (backdrop-filter: blur(1px)) or (-webkit-backdrop-filter: blur(1px)) {
  .navbar.scrolled {
    -webkit-backdrop-filter: blur(16px) saturate(1.7);
    backdrop-filter: blur(16px) saturate(1.7);
  }
}

/* 墨条宿主 */
.nav-links { position: relative; }

/* 滑动墨条：糖果渐变软胶囊，JS 测量位置后滑过去 */
.nav-ink {
  position: absolute;
  z-index: 0;
  border-radius: var(--r-pill);
  background: linear-gradient(135deg,
    color-mix(in srgb, var(--c-primary-soft) 75%, transparent),
    color-mix(in srgb, var(--c-sky) 55%, transparent));
  box-shadow: inset 0 0 0 1px color-mix(in srgb, var(--c-primary) 26%, transparent);
  opacity: 0;
  pointer-events: none;
  transition:
    left .38s var(--ease-spring),
    top .38s var(--ease-spring),
    width .38s var(--ease-spring),
    height .38s var(--ease-spring),
    opacity .25s var(--ease-out);
}

/* 链接浮在墨条之上；active 自身底色让位给墨条 */
.nav-link { z-index: 1; }
.nav-link.active { background: transparent; }

/* 抽屉模式（≤860px）：墨条变成行高亮圆角矩形 */
@media (max-width: 860px) {
  .nav-ink { border-radius: 14px; }
}

@media (prefers-reduced-motion: reduce) {
  .nav-ink { transition: opacity .2s var(--ease-out); }  /* 位移瞬移，只保留淡入 */
}

/* ═══════════════════════════════════════════════════════════════
   【三期 round-11】美术焕新 · Hero 照片位 / 3D 芯片图标 / 漂浮装饰 / 入场编排
   素材：Microsoft Fluent Emoji 3D（MIT License），本地自托管 images/decor/
   ═══════════════════════════════════════════════════════════════ */

/* ── 头像照片位：默认 3D 团子玩偶；上传精选照后由 JS 叠加 .avatar-photo ── */
.avatar {
  background:
    radial-gradient(circle at 32% 26%,
      color-mix(in srgb, var(--c-primary-soft) 55%, var(--surface)),
      var(--surface) 72%);
}
.avatar-fallback {
  width: 74%;
  height: 74%;
  object-fit: contain;
  filter: drop-shadow(0 6px 10px color-mix(in srgb, var(--c-primary-strong) 28%, transparent));
}
.avatar.has-photo .avatar-fallback { display: none; }
.avatar-photo {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: 50%;
}

/* 头像外圈：缓旋虚线糖霜圈（reduced-motion 停转） */
.avatar-wrap::after {
  content: "";
  position: absolute;
  inset: -9px;
  border-radius: 50%;
  border: 2px dashed color-mix(in srgb, var(--c-primary) 55%, transparent);
  animation: ring-spin 26s linear infinite;
  pointer-events: none;
}
@keyframes ring-spin { to { transform: rotate(360deg); } }

/* ── 漂浮装饰云朵/星星 ── */
.hero-decor {
  position: absolute;
  z-index: 1;
  pointer-events: none;
  opacity: .92;
}
.d-cloud1 {
  width: clamp(88px, 14vw, 150px);
  left: max(3vw, 12px);
  top: 16%;
  animation: drift-a 9s ease-in-out infinite alternate;
}
.d-cloud2 {
  width: clamp(64px, 10vw, 110px);
  right: max(4vw, 16px);
  top: 58%;
  opacity: .8;
  animation: drift-b 11s ease-in-out infinite alternate;
}
.d-spark {
  width: clamp(40px, 6vw, 68px);
  right: max(10vw, 60px);
  top: 13%;
  animation: twinkle-soft 3.6s ease-in-out infinite;
}
.d-rainbow {
  width: clamp(72px, 11vw, 118px);
  left: max(15vw, 130px);
  top: 6%;
  transform: rotate(-10deg);
  opacity: .9;
  animation: drift-a 12s ease-in-out infinite alternate-reverse;
}
[data-theme="night"] .hero-decor { opacity: .55; }
@keyframes drift-a {
  from { transform: translateX(0) translateY(0); }
  to   { transform: translateX(18px) translateY(-10px); }
}
@keyframes drift-b {
  from { transform: translateX(0) translateY(0); }
  to   { transform: translateX(-22px) translateY(-8px); }
}
@keyframes twinkle-soft {
  0%, 100% { opacity: .35; transform: scale(.92); }
  50%      { opacity: .95; transform: scale(1.06); }
}

/* ── 三枚统计芯片：Fluent 3D 图标 ── */
.stat-icon img {
  display: block;
  width: 22px;
  height: 22px;
  object-fit: contain;
  filter: drop-shadow(0 2px 3px rgba(70, 58, 78, .18));
}

/* ── 入场编排：hero 子元素依次上浮进场 ── */
@keyframes rise-in {
  from { opacity: 0; transform: translateY(20px); }
  to   { opacity: 1; transform: none; }
}
.hero-content > * {
  animation: rise-in .7s cubic-bezier(.22, .9, .34, 1) both;
}
.hero-content > :nth-child(1) { animation-delay: .05s; }  /* avatar-wrap */
.hero-content > :nth-child(2) { animation-delay: .16s; }  /* title */
.hero-content > :nth-child(3) { animation-delay: .24s; }  /* subtitle */
.hero-content > :nth-child(4) { animation-delay: .32s; }  /* birthday */
.hero-content > :nth-child(5) { animation-delay: .40s; }  /* stats */
.hero-content > :nth-child(6) { animation-delay: .48s; }  /* chip */
.hero-content > :nth-child(7) { animation-delay: .56s; }  /* actions */
/* 头像：先弹跳进场，再接原有漂浮（延迟到进场结束才开始） */
.avatar-wrap {
  animation:
    pop-in .62s cubic-bezier(.34, 1.56, .64, 1) .05s both,
    float-y var(--t-float) ease-in-out .75s infinite;
}
@keyframes pop-in {
  from { opacity: 0; transform: scale(.55) rotate(-8deg); }
  to   { opacity: 1; transform: scale(1) rotate(0deg); }
}

@media (prefers-reduced-motion: reduce) {
  .hero-content > *,
  .avatar-wrap,
  .avatar-wrap::after,
  .hero-decor {
    animation: none !important;
  }
  .hero-decor { opacity: .8; }
}

/* ── 手机适配微调 ── */
@media (max-width: 560px) {
  .d-rainbow, .d-cloud2 { display: none; }        /* 小屏只留一朵云＋星星 */
  .d-cloud1 { width: 76px; top: 12%; }
  .d-spark  { width: 36px; right: 8vw; top: 10%; }
  .hero-actions { gap: 10px; }
  .hero-actions .btn { flex: 1 1 100%; justify-content: center; }  /* 双按钮纵向铺满 */
}