/* ============================================================
   关于我们 · 私人回忆档案馆
   ------------------------------------------------------------
   1. 设计变量 / 基础
   2. 导航与进度
   3. 首屏
   4. 章节标题
   5. 序 + 数字
   6. 时间线
   7. 相册
   8. 信
   9. 城市
   10. 结尾与页脚
   11. 灯箱
   12. 动效 / 响应式 / 深色模式
   ============================================================ */

/* ---------- 1. 变量 ---------- */
:root {
  --paper: #f6f1e7;
  --paper-deep: #ece3d3;
  --card: #fbf7ef;
  --ink: #201c17;
  --ink-soft: #5b5348;
  --ink-faint: #746a5e;
  --line: rgba(32, 28, 23, 0.14);
  --line-soft: rgba(32, 28, 23, 0.07);
  --accent: #a8512e;
  --accent-soft: #c47e57;
  --seal: #a83a2c;
  --frame: #fffdf8;
  --frame-ink: #6f6659;
  --shadow-soft: 0 24px 50px -38px rgba(46, 28, 12, 0.55);
  --shadow-photo: 0 30px 60px -34px rgba(30, 20, 10, 0.55), 0 2px 8px rgba(30, 20, 10, 0.1);

  --font-serif: "Songti SC", "STSong", "STZhongsong", "Source Han Serif SC", "Noto Serif SC",
    "Noto Serif CJK SC", "SimSun", "Georgia", serif;
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB",
    "Microsoft YaHei", "Source Han Sans SC", sans-serif;
  --font-mono: "SFMono-Regular", "Cascadia Mono", "Consolas", "Liberation Mono", monospace;

  --wrap: 1160px;
  --pad: clamp(20px, 5vw, 64px);
  --radius: 3px;
  --ease: cubic-bezier(0.2, 0.7, 0.2, 1);
}

@media (prefers-color-scheme: dark) {
  :root {
    --paper: #12100e;
    --paper-deep: #0b0a09;
    --card: #1c1916;
    --ink: #eee5d7;
    --ink-soft: #b6aa99;
    --ink-faint: #867b6b;
    --line: rgba(238, 229, 215, 0.15);
    --line-soft: rgba(238, 229, 215, 0.07);
    --accent: #dd8a5f;
    --accent-soft: #b96c46;
    --seal: #b8442f;
    --frame: #26221d;
    --frame-ink: #a89c8b;
    --shadow-soft: 0 24px 50px -34px rgba(0, 0, 0, 0.85);
    --shadow-photo: 0 30px 60px -30px rgba(0, 0, 0, 0.9), 0 2px 10px rgba(0, 0, 0, 0.4);
  }
}

/* ---------- 基础 ---------- */
*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 88px;
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  background:
    radial-gradient(1100px 620px at 88% -8%, rgba(196, 132, 90, 0.17), transparent 68%),
    radial-gradient(900px 520px at -8% 42%, rgba(122, 124, 140, 0.08), transparent 70%),
    linear-gradient(180deg, var(--paper) 0%, var(--paper) 62%, var(--paper-deep) 100%);
}

img {
  max-width: 100%;
  display: block;
}

::selection {
  background: color-mix(in srgb, var(--accent) 26%, transparent);
  color: var(--ink);
}

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}

a {
  color: inherit;
}

.skip {
  position: fixed;
  left: 16px;
  top: -60px;
  z-index: 100;
  padding: 10px 16px;
  background: var(--ink);
  color: var(--paper);
  font-size: 13px;
  text-decoration: none;
  transition: top 0.2s;
}

.skip:focus {
  top: 12px;
}

.wrap {
  width: 100%;
  max-width: var(--wrap);
  margin: 0 auto;
}

.mono {
  font-family: var(--font-mono);
  font-size: 0.78em;
  letter-spacing: 0.12em;
}

.dot {
  width: 3px;
  height: 3px;
  border-radius: 50%;
  background: currentColor;
  opacity: 0.5;
  display: inline-block;
}

/* 颗粒质感 */
.grain {
  position: fixed;
  inset: 0;
  z-index: 3;
  pointer-events: none;
  opacity: 0.5;
  mix-blend-mode: multiply;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='160' height='160'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.82' numOctaves='3' stitchTiles='stitch'/%3E%3CfeColorMatrix type='saturate' values='0'/%3E%3C/filter%3E%3Crect width='160' height='160' filter='url(%23n)' opacity='0.32'/%3E%3C/svg%3E");
  background-size: 160px 160px;
}

@media (prefers-color-scheme: dark) {
  .grain {
    mix-blend-mode: screen;
    opacity: 0.22;
  }
}

/* ---------- 2. 导航与进度 ---------- */
.progress {
  position: fixed;
  inset: 0 0 auto 0;
  height: 2px;
  z-index: 60;
  background: transparent;
}

.progress i {
  display: block;
  height: 100%;
  width: 0;
  background: linear-gradient(90deg, var(--accent-soft), var(--accent));
  transition: width 0.08s linear;
}

.nav {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 50;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  padding: 18px var(--pad);
  border-bottom: 1px solid transparent;
  transition:
    background 0.45s var(--ease),
    border-color 0.45s var(--ease),
    backdrop-filter 0.45s var(--ease),
    padding 0.45s var(--ease);
}

.nav.is-scrolled {
  padding-top: 12px;
  padding-bottom: 12px;
  background: var(--paper);
  background: color-mix(in srgb, var(--paper) 80%, transparent);
  backdrop-filter: blur(16px) saturate(1.15);
  border-bottom-color: var(--line-soft);
}

.nav__brand {
  display: inline-flex;
  align-items: center;
  gap: 11px;
  text-decoration: none;
}

.nav__mark {
  width: 27px;
  height: 27px;
  display: grid;
  place-items: center;
  border: 1px solid var(--accent);
  border-radius: 50%;
  color: var(--accent);
  font-family: var(--font-serif);
  font-size: 14px;
  line-height: 1;
  transform: rotate(-4deg);
  transition: transform 0.4s var(--ease), background 0.4s;
}

.nav__brand:hover .nav__mark {
  transform: rotate(0deg);
  background: color-mix(in srgb, var(--accent) 10%, transparent);
}

.nav__title {
  font-family: var(--font-serif);
  font-size: 15px;
  letter-spacing: 0.18em;
  white-space: nowrap;
}

.nav__links {
  display: flex;
  align-items: center;
  gap: clamp(18px, 2.6vw, 34px);
}

.nav__links a {
  position: relative;
  font-size: 12.5px;
  letter-spacing: 0.14em;
  color: var(--ink-soft);
  text-decoration: none;
  padding: 4px 0;
  transition: color 0.3s;
}

.nav__links a::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 1px;
  background: var(--accent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.35s var(--ease);
}

.nav__links a:hover,
.nav__links a.is-active {
  color: var(--ink);
}

.nav__links a.is-active::after,
.nav__links a:hover::after {
  transform: scaleX(1);
}

.nav__days {
  margin: 0;
  display: inline-flex;
  align-items: baseline;
  gap: 4px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.08em;
  color: var(--accent);
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}

.nav__days-unit {
  color: var(--ink-faint);
  font-size: 10px;
}

/* ---------- 3. 首屏 ---------- */
.hero {
  position: relative;
  min-height: 100svh;
  display: flex;
  align-items: center;
  padding: clamp(110px, 15vh, 160px) var(--pad) clamp(64px, 9vh, 100px);
  overflow: hidden;
}

.hero__glow {
  position: absolute;
  top: -26%;
  right: -12%;
  width: min(78vw, 900px);
  aspect-ratio: 1;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(198, 132, 88, 0.28), transparent 64%);
  filter: blur(12px);
  pointer-events: none;
}

.hero__inner {
  position: relative;
  width: 100%;
  max-width: var(--wrap);
  margin: 0 auto;
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
  gap: clamp(28px, 4vw, 64px);
  align-items: center;
}

.hero__text {
  position: relative;
  z-index: 2;
}

.eyebrow {
  display: flex;
  align-items: center;
  gap: 12px;
  margin: 0 0 clamp(22px, 3vw, 34px);
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.22em;
  color: var(--ink-faint);
  text-transform: uppercase;
}

.eyebrow__sep {
  width: 34px;
  height: 1px;
  background: var(--line);
}

.hero__title {
  margin: 0;
  font-family: var(--font-serif);
  font-weight: 600;
  font-size: clamp(64px, 10.5vw, 148px);
  line-height: 0.94;
  letter-spacing: 0.01em;
}

.hero__title-line {
  display: block;
}

.hero__title-line--em {
  margin-left: 0.42em;
  color: var(--accent);
}

.hero__sub {
  margin: clamp(22px, 3vw, 32px) 0 0;
  max-width: 25em;
  font-size: clamp(15px, 1.5vw, 17px);
  line-height: 1.95;
  color: var(--ink-soft);
}

.hero__meta {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-top: 26px;
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--ink-faint);
}

.scroll-cue {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  margin-top: clamp(36px, 6vh, 58px);
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.2em;
  color: var(--ink-faint);
  text-decoration: none;
}

.scroll-cue i {
  width: 46px;
  height: 1px;
  background: var(--line);
  position: relative;
  overflow: hidden;
}

.scroll-cue i::after {
  content: "";
  position: absolute;
  inset: 0;
  width: 40%;
  background: var(--accent);
  animation: cue 2.6s var(--ease) infinite;
}

@keyframes cue {
  0% {
    transform: translateX(-110%);
  }
  60%,
  100% {
    transform: translateX(260%);
  }
}

/* 照片堆 */
.hero__stack {
  position: relative;
  justify-self: end;
  width: 100%;
  max-width: 470px;
  aspect-ratio: 4 / 5;
}

.hero__stack figure {
  position: absolute;
  margin: 0;
  padding: 10px 10px 32px;
  background: var(--frame);
  border-radius: 2px;
  box-shadow: var(--shadow-photo);
  animation: float 11s ease-in-out infinite;
}

.hero__stack figure:nth-child(1) {
  top: 1%;
  left: 0;
  width: 63%;
  transform: rotate(-6deg);
  animation-delay: -3s;
  z-index: 1;
}

.hero__stack figure:nth-child(2) {
  top: 16%;
  right: 0;
  width: 59%;
  transform: rotate(5deg);
  animation-delay: -7s;
  z-index: 2;
}

.hero__stack figure:nth-child(3) {
  bottom: 0;
  left: 15%;
  width: 58%;
  transform: rotate(-2.5deg);
  animation-delay: -1s;
  z-index: 3;
}

.hero__stack img {
  width: 100%;
  height: auto;
  aspect-ratio: 4 / 5;
  object-fit: cover;
  filter: saturate(0.94) contrast(1.03);
}

.hero__stack figcaption {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 9px;
  text-align: center;
  font-family: var(--font-mono);
  font-size: 9.5px;
  letter-spacing: 0.16em;
  color: var(--frame-ink);
}

@keyframes float {
  0%,
  100% {
    translate: 0 0;
  }
  50% {
    translate: 0 -12px;
  }
}

/* ---------- 4. 章节标题 ---------- */
.section {
  padding: clamp(64px, 9vw, 120px) var(--pad);
}

.sec-head {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: baseline;
  gap: 0 18px;
  padding-top: 18px;
  border-top: 1px solid var(--line);
}

.sec-head__index {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--accent);
}

.sec-head__title {
  margin: 0;
  font-family: var(--font-serif);
  font-weight: 500;
  font-size: clamp(23px, 3vw, 36px);
  line-height: 1.3;
  letter-spacing: 0.03em;
}

.sec-head__note {
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.2em;
  color: var(--ink-faint);
  text-transform: uppercase;
}

/* ---------- 5. 序 ---------- */
.about {
  display: grid;
  grid-template-columns: minmax(0, 1.4fr) minmax(0, 0.85fr);
  gap: clamp(32px, 6vw, 88px);
  margin-top: clamp(40px, 6vw, 72px);
}

.about__lead {
  margin: 0;
  font-family: var(--font-serif);
  font-size: clamp(19px, 2.1vw, 26px);
  line-height: 1.95;
  letter-spacing: 0.015em;
  color: var(--ink);
  text-wrap: pretty;
}

.about__side {
  padding-top: 4px;
}

.about__note {
  margin: 0 0 26px;
  font-size: 13px;
  line-height: 1.8;
  color: var(--ink-faint);
}

.facts {
  display: grid;
  grid-template-columns: 1fr 1fr;
  margin: 0;
}

.fact {
  padding: 16px 0 18px;
  border-top: 1px solid var(--line);
}

.fact dt {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.16em;
  color: var(--ink-faint);
}

.fact dd {
  display: flex;
  align-items: baseline;
  gap: 5px;
  margin: 8px 0 0;
  font-family: var(--font-serif);
  font-size: clamp(30px, 3.4vw, 40px);
  line-height: 1;
  color: var(--ink);
  font-variant-numeric: tabular-nums;
}

.fact dd span {
  font-family: var(--font-sans);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--ink-faint);
}

.fact dd b {
  font-weight: 500;
  font-variant-numeric: tabular-nums;
}

/* ---------- 6. 时间线 ---------- */
.timeline {
  position: relative;
  margin-top: clamp(44px, 6vw, 80px);
  padding-bottom: 10px;
}

.timeline__rail {
  position: absolute;
  left: 50%;
  top: 6px;
  bottom: 6px;
  width: 1px;
  background: var(--line-soft);
  transform: translateX(-0.5px);
}

.timeline__rail i {
  position: absolute;
  inset: 0 0 auto 0;
  height: var(--rail, 0%);
  background: linear-gradient(180deg, var(--accent), var(--accent-soft));
  transition: height 0.15s linear;
}

.timeline__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: clamp(44px, 6vw, 84px);
}

.titem {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: clamp(36px, 5vw, 76px);
  align-items: center;
}

.titem::before {
  content: "";
  position: absolute;
  left: 50%;
  top: 50%;
  width: 8px;
  height: 8px;
  margin: -4px 0 0 -4px;
  border-radius: 50%;
  background: var(--paper);
  border: 1px solid var(--accent-soft);
  z-index: 3;
  transition:
    background 0.4s,
    box-shadow 0.4s,
    border-color 0.4s;
}

.titem.is-in::before {
  background: var(--accent);
  border-color: var(--accent);
  box-shadow: 0 0 0 5px color-mix(in srgb, var(--accent) 12%, transparent);
}

.titem__card {
  padding-right: clamp(18px, 3vw, 42px);
}

.titem:nth-child(even) .titem__card {
  grid-column: 2;
  grid-row: 1;
  padding-right: 0;
  padding-left: clamp(18px, 3vw, 42px);
}

.titem:nth-child(even) .titem__figure {
  grid-column: 1;
  grid-row: 1;
}

.titem__meta {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.14em;
  color: var(--accent);
  font-variant-numeric: tabular-nums;
}

.titem__tag {
  padding: 2px 8px;
  border: 1px solid var(--line);
  border-radius: 999px;
  font-family: var(--font-sans);
  font-size: 10px;
  letter-spacing: 0.1em;
  color: var(--ink-faint);
}

.titem__title {
  margin: 0 0 12px;
  font-family: var(--font-serif);
  font-weight: 500;
  font-size: clamp(21px, 2.4vw, 28px);
  line-height: 1.4;
  letter-spacing: 0.02em;
}

.titem__text {
  margin: 0;
  font-size: 14.5px;
  line-height: 2;
  color: var(--ink-soft);
  text-wrap: pretty;
}

.titem__figure {
  margin: 0;
  padding: 8px;
  background: var(--frame);
  border-radius: 2px;
  box-shadow: var(--shadow-soft);
  transform: rotate(-1.1deg);
  transition: transform 0.7s var(--ease), box-shadow 0.7s var(--ease);
}

.titem:nth-child(even) .titem__figure {
  transform: rotate(1.1deg);
}

/* 没有配图的条目：文字横跨整行 */
.titem--solo .titem__card,
.titem--solo:nth-child(even) .titem__card {
  grid-column: 1 / -1;
  grid-row: 1;
  max-width: 52ch;
  padding-right: 0;
  padding-left: 0;
}

.titem__figure:hover {
  transform: rotate(0deg) translateY(-3px);
  box-shadow: var(--shadow-photo);
}

.titem__figure img {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  filter: saturate(0.95) contrast(1.02);
  transition: filter 0.6s;
}

.titem__figure:hover img {
  filter: saturate(1.02) contrast(1.04);
}

.titem__figure figcaption {
  padding: 9px 2px 3px;
  font-family: var(--font-mono);
  font-size: 9.5px;
  letter-spacing: 0.16em;
  color: var(--frame-ink);
  text-align: center;
}

/* ---------- 7. 相册 ---------- */
.gallery {
  margin-top: clamp(36px, 5vw, 64px);
  columns: 3;
  column-gap: 16px;
}

.gcard {
  position: relative;
  display: block;
  width: 100%;
  margin: 0 0 16px;
  padding: 0;
  border: 0;
  font: inherit;
  color: inherit;
  text-align: left;
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--card);
  cursor: zoom-in;
  break-inside: avoid;
  box-shadow: 0 1px 0 var(--line-soft), var(--shadow-soft);
}

.gcard img {
  width: 100%;
  aspect-ratio: var(--ratio, 1);
  object-fit: cover;
  transition: transform 1s var(--ease), filter 0.6s;
  filter: saturate(0.96);
}

.gcard:hover img,
.gcard:focus-visible img {
  transform: scale(1.035);
  filter: saturate(1.02);
}

.gcard__cap {
  position: absolute;
  inset: auto 0 0 0;
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  padding: 34px 14px 12px;
  background: linear-gradient(transparent, rgba(18, 12, 6, 0.72));
  color: #f6f1e7;
  font-size: 12.5px;
  letter-spacing: 0.04em;
  opacity: 0;
  transform: translateY(6px);
  transition: opacity 0.4s var(--ease), transform 0.4s var(--ease);
}

.gcard__cap .mono {
  font-size: 9.5px;
  opacity: 0.75;
  white-space: nowrap;
}

.gcard:hover .gcard__cap,
.gcard:focus-visible .gcard__cap {
  opacity: 1;
  transform: none;
}

.gallery__hint {
  margin: 16px 0 0;
  text-align: right;
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.14em;
  color: var(--ink-faint);
}

/* 触屏设备没有 hover，直接显示说明 */
@media (hover: none) {
  .gcard__cap {
    opacity: 1;
    transform: none;
    padding-top: 26px;
  }
}

/* ---------- 8. 信 ---------- */
.letters {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: clamp(16px, 2.4vw, 26px);
  margin-top: clamp(36px, 5vw, 64px);
}

.letter {
  position: relative;
  display: flex;
  flex-direction: column;
  padding: clamp(26px, 3vw, 36px) clamp(22px, 2.6vw, 30px) clamp(20px, 2.4vw, 26px);
  background: var(--card);
  border: 1px solid var(--line-soft);
  border-radius: 2px;
  box-shadow: var(--shadow-soft);
  transition: transform 0.6s var(--ease), box-shadow 0.6s var(--ease);
}

.letter:nth-child(1) {
  transform: rotate(-0.7deg);
}

.letter:nth-child(2) {
  transform: rotate(0.5deg) translateY(10px);
}

.letter:nth-child(3) {
  transform: rotate(-0.3deg) translateY(3px);
}

.letter:hover {
  transform: rotate(0deg) translateY(-4px);
  box-shadow: var(--shadow-photo);
}

.letter__seal {
  position: absolute;
  top: 16px;
  right: 16px;
  width: 28px;
  height: 28px;
  display: grid;
  place-items: center;
  background: var(--seal);
  color: #f9efe4;
  font-family: var(--font-serif);
  font-size: 13px;
  line-height: 1;
  border-radius: 2px;
  transform: rotate(7deg);
  opacity: 0.9;
}

.letter__date {
  margin: 0 0 16px;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.16em;
  color: var(--ink-faint);
}

.letter__title {
  margin: 0 0 14px;
  padding-right: 24px;
  font-family: var(--font-serif);
  font-weight: 500;
  font-size: 19px;
  line-height: 1.5;
  letter-spacing: 0.02em;
}

.letter__body {
  flex: 1;
  margin: 0;
  font-size: 13.5px;
  line-height: 2.05;
  color: var(--ink-soft);
  white-space: pre-line;
  text-wrap: pretty;
}

.letter__sign {
  margin: 22px 0 0;
  text-align: right;
  font-family: var(--font-serif);
  font-size: 12.5px;
  color: var(--ink-faint);
  letter-spacing: 0.06em;
}

/* ---------- 9. 城市 ---------- */
.cities {
  list-style: none;
  margin: clamp(32px, 4vw, 56px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0 clamp(24px, 4vw, 64px);
}

.city {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 20px 0 24px;
  border-top: 1px solid var(--line);
  transition: border-color 0.4s;
}

.city:hover {
  border-top-color: var(--accent);
}

.city__name {
  margin: 0;
  font-family: var(--font-serif);
  font-size: clamp(22px, 2.6vw, 30px);
  font-weight: 500;
  letter-spacing: 0.06em;
  transition: color 0.4s;
}

.city:hover .city__name {
  color: var(--accent);
}

.city__year {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.1em;
  color: var(--ink-faint);
}

.city__note {
  margin-left: auto;
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--ink-faint);
  text-align: right;
}

/* ---------- 10. 结尾与页脚 ---------- */
.ending {
  position: relative;
  overflow: hidden;
  text-align: center;
  padding: clamp(90px, 14vw, 170px) var(--pad);
}

.ending__glow {
  position: absolute;
  left: 50%;
  top: 46%;
  width: min(120vw, 900px);
  aspect-ratio: 1;
  translate: -50% -50%;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(196, 126, 80, 0.2), transparent 62%);
  pointer-events: none;
}

.ending__inner {
  position: relative;
}

.ending__line {
  margin: 0 0 18px;
  font-family: var(--font-serif);
  font-weight: 600;
  font-size: clamp(42px, 7.4vw, 92px);
  line-height: 1.05;
  letter-spacing: 0.04em;
}

.ending__sub {
  margin: 0 0 clamp(34px, 5vw, 52px);
  font-size: 12.5px;
  letter-spacing: 0.28em;
  color: var(--ink-faint);
}

.ending__days {
  display: flex;
  align-items: baseline;
  justify-content: center;
  gap: 7px;
  font-variant-numeric: tabular-nums;
}

.ending__days strong {
  font-family: var(--font-serif);
  font-weight: 500;
  font-size: clamp(30px, 4vw, 46px);
  line-height: 1;
  color: var(--accent);
}

.ending__days span {
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--ink-faint);
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin-top: clamp(34px, 5vw, 48px);
  padding: 12px 24px;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--ink);
  font-size: 12.5px;
  letter-spacing: 0.16em;
  text-decoration: none;
  transition:
    background 0.4s var(--ease),
    color 0.4s var(--ease),
    border-color 0.4s var(--ease);
}

.btn:hover {
  background: var(--ink);
  border-color: var(--ink);
  color: var(--paper);
}

.footer {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 10px 24px;
  padding: 26px var(--pad) 34px;
  border-top: 1px solid var(--line-soft);
  font-size: 11.5px;
  letter-spacing: 0.06em;
  color: var(--ink-faint);
}

.footer p {
  margin: 0;
}

.footer__meta {
  display: flex;
  align-items: center;
  gap: 12px;
}

/* ---------- 11. 灯箱 ---------- */
.lightbox {
  position: fixed;
  inset: 0;
  margin: 0;
  padding: 0;
  border: 0;
  width: 100%;
  max-width: none;
  height: 100%;
  max-height: none;
  background: transparent;
  overflow: hidden;
}

.lightbox::backdrop {
  background: rgba(12, 9, 6, 0.9);
  backdrop-filter: blur(8px);
}

.lightbox__inner {
  position: relative;
  width: 100%;
  height: 100%;
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
  gap: clamp(8px, 2vw, 24px);
  padding: clamp(16px, 4vw, 48px);
}

.lightbox[open] .lightbox__inner {
  animation: lamp 0.35s var(--ease);
}

@keyframes lamp {
  from {
    opacity: 0;
    transform: translateY(10px) scale(0.995);
  }
}

.lightbox__figure {
  margin: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
  min-width: 0;
}

.lightbox__figure img {
  max-width: 100%;
  max-height: 74vh;
  width: auto;
  object-fit: contain;
  background: #0b0908;
  box-shadow: 0 40px 90px -40px #000;
}

.lightbox__caption {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: center;
  gap: 14px;
  max-width: 68ch;
  color: #eee5d7;
  font-size: 13px;
  letter-spacing: 0.04em;
  text-align: center;
}

.lightbox__date {
  color: rgba(238, 229, 215, 0.55);
  font-size: 10.5px;
}

.lightbox__date::before,
.lightbox__count::before {
  content: "·";
  margin-right: 14px;
  color: rgba(238, 229, 215, 0.35);
}

.lightbox__count {
  margin-left: 0;
  color: rgba(238, 229, 215, 0.45);
  font-size: 10.5px;
  white-space: nowrap;
}

.lightbox__close {
  position: absolute;
  top: 14px;
  right: 16px;
  width: 42px;
  height: 42px;
  display: grid;
  place-items: center;
  background: transparent;
  border: 1px solid rgba(238, 229, 215, 0.22);
  border-radius: 50%;
  color: #eee5d7;
  font-size: 24px;
  line-height: 1;
  cursor: pointer;
  transition: background 0.3s, border-color 0.3s;
}

.lightbox__close:hover {
  background: rgba(238, 229, 215, 0.1);
  border-color: rgba(238, 229, 215, 0.45);
}

.lightbox__nav {
  width: clamp(38px, 4vw, 48px);
  height: clamp(38px, 4vw, 48px);
  display: grid;
  place-items: center;
  background: rgba(238, 229, 215, 0.06);
  border: 1px solid rgba(238, 229, 215, 0.18);
  border-radius: 50%;
  color: #eee5d7;
  font-size: 26px;
  line-height: 1;
  cursor: pointer;
  transition: background 0.3s, border-color 0.3s;
}

.lightbox__nav:hover {
  background: rgba(238, 229, 215, 0.14);
  border-color: rgba(238, 229, 215, 0.4);
}

.lightbox.is-locked {
  overflow: hidden;
}

body.is-locked {
  overflow: hidden;
}

/* ---------- 12. 动效与响应式 ---------- */
.reveal {
  opacity: 0;
  transform: translateY(18px);
  transition:
    opacity 0.9s var(--ease),
    transform 0.9s var(--ease);
}

.reveal.is-in {
  opacity: 1;
  transform: none;
}

@media (max-width: 1024px) {
  .hero__inner {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
  }
}

@media (max-width: 900px) {
  .gallery {
    columns: 2;
  }

  .letters {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .letter:nth-child(3) {
    grid-column: 1 / -1;
  }

  .letter:nth-child(2) {
    transform: rotate(0.4deg);
  }

  .cities {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 860px) {
  .hero {
    padding-top: clamp(104px, 16vh, 140px);
  }

  .hero__inner {
    grid-template-columns: minmax(0, 1fr);
    gap: clamp(36px, 8vw, 56px);
  }

  .hero__stack {
    justify-self: center;
    max-width: 340px;
    margin-top: 8px;
  }

  .about {
    grid-template-columns: minmax(0, 1fr);
  }

  .timeline__rail {
    left: 6px;
  }

  .timeline__list {
    gap: clamp(40px, 8vw, 60px);
  }

  .titem {
    grid-template-columns: minmax(0, 1fr);
    gap: 20px;
    padding-left: 32px;
  }

  .titem::before {
    left: 6px;
    top: 9px;
    margin: 0 0 0 -3.5px;
  }

  .titem__card,
  .titem:nth-child(even) .titem__card {
    grid-column: 1;
    grid-row: 1;
    padding: 0;
  }

  .titem__figure,
  .titem:nth-child(even) .titem__figure {
    grid-column: 1;
    grid-row: 2;
    max-width: 440px;
  }
}

@media (max-width: 400px) {
  .nav {
    gap: 10px;
    padding-left: 16px;
    padding-right: 16px;
  }

  .nav__brand {
    gap: 0;
  }

  .nav__links {
    gap: 12px;
  }

  .nav__links a {
    font-size: 11px;
    letter-spacing: 0.04em;
  }

  .nav__days {
    font-size: 10px;
  }
}

@media (max-width: 640px) {
  .nav__title {
    display: none;
  }
  .nav__links {
    gap: 15px;
  }

  .nav__links a {
    font-size: 11.5px;
    letter-spacing: 0.08em;
  }

  .nav__days {
    font-size: 10.5px;
  }

  .eyebrow {
    letter-spacing: 0.16em;
  }

  .sec-head {
    grid-template-columns: auto 1fr;
    row-gap: 6px;
  }

  .sec-head__note {
    grid-column: 2;
    grid-row: 2;
  }

  .hero__title {
    font-size: clamp(58px, 19vw, 86px);
  }

  .hero__title-line--em {
    margin-left: 0.3em;
  }

  .letters {
    grid-template-columns: minmax(0, 1fr);
  }

  .letter,
  .letter:nth-child(2),
  .letter:nth-child(3) {
    grid-column: auto;
    transform: none;
  }

  .cities {
    grid-template-columns: minmax(0, 1fr);
  }

  .city__note {
    font-size: 11px;
  }

  .gallery__hint {
    text-align: left;
  }

  .lightbox__caption {
    flex-wrap: wrap;
    gap: 6px 12px;
    font-size: 12px;
  }

  .lightbox__count {
    margin-left: 0;
  }

  .footer {
    flex-direction: column;
    align-items: flex-start;
  }

  .sec-head__note {
    display: none;
  }

  .scroll-cue {
    display: none;
  }

  .hero__stack {
    max-width: 320px;
  }
}

@media (max-width: 560px) {
  .gallery {
    columns: 1;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }

  .reveal {
    opacity: 1;
    transform: none;
  }
}

.noscript {
  position: fixed;
  left: 50%;
  bottom: 24px;
  translate: -50% 0;
  margin: 0;
  padding: 12px 18px;
  border-radius: 999px;
  background: var(--ink);
  color: var(--paper);
  font-size: 13px;
  z-index: 80;
}

/* ============================================================
   就地编辑
   ============================================================ */

/* 标题过长时自动缩小，避免撑破首屏 */
.hero__title--long {
  font-size: clamp(44px, 8vw, 96px);
  line-height: 1.04;
  letter-spacing: 0;
  overflow-wrap: anywhere;
  text-wrap: balance;
}

/* 编辑器里输入的回车要保留 */
.about__lead,
.titem__text {
  white-space: pre-line;
}

/* 右下角铅笔 */
.edit-fab {
  position: fixed;
  right: clamp(16px, 3vw, 28px);
  bottom: calc(env(safe-area-inset-bottom, 0px) + clamp(16px, 3vw, 28px));
  z-index: 70;
  width: 56px;
  height: 56px;
  display: grid;
  place-items: center;
  padding: 0;
  border: 1px solid color-mix(in srgb, var(--ink) 12%, transparent);
  border-radius: 50%;
  background: var(--accent);
  color: var(--paper);
  cursor: grab;
  touch-action: none;
  box-shadow:
    0 18px 36px -16px rgba(70, 35, 12, 0.62),
    0 2px 6px rgba(30, 18, 8, 0.14);
  transition:
    transform 0.32s var(--ease),
    scale 0.22s var(--ease),
    opacity 0.25s var(--ease),
    visibility 0.25s;
}

.edit-fab svg {
  width: 23px;
  height: 23px;
  pointer-events: none;
}

.edit-fab:hover {
  scale: 1.07;
}

.edit-fab:active {
  scale: 0.96;
}

.edit-fab.is-dragging {
  scale: 1.1;
  cursor: grabbing;
  transition: scale 0.2s var(--ease);
  box-shadow: 0 26px 50px -18px rgba(70, 35, 12, 0.7);
}

body.is-dragging {
  cursor: grabbing;
  user-select: none;
  -webkit-user-select: none;
}

body.editor-open .edit-fab {
  opacity: 0;
  visibility: hidden;
  transform: translateY(8px);
  pointer-events: none;
}

.edit-hint {
  position: fixed;
  left: 0;
  top: 0;
  z-index: 72;
  transform: translate(-50%, -100%);
  padding: 6px 11px;
  border-radius: 999px;
  background: var(--ink);
  color: var(--paper);
  font-size: 11px;
  letter-spacing: 0.06em;
  white-space: nowrap;
  pointer-events: none;
  box-shadow: 0 8px 20px -10px rgba(0, 0, 0, 0.55);
}

.edit-hint[hidden] {
  display: none;
}

/* 拖拽时高亮落点 / 正在编辑的区块 */
[data-edit] {
  position: relative;
}

[data-edit].is-drop-target,
[data-edit].is-editing {
  outline: 2px solid var(--accent);
  outline-offset: 5px;
  border-radius: 2px;
}

body.is-picking [data-edit] {
  outline: 1px dashed color-mix(in srgb, var(--accent) 48%, transparent);
  outline-offset: 5px;
  cursor: pointer;
}

body.is-picking [data-edit]:hover {
  outline: 2px solid var(--accent);
  background: color-mix(in srgb, var(--accent) 5%, transparent);
}

/* 菜单 */
.edit-menu {
  position: fixed;
  right: clamp(16px, 3vw, 28px);
  bottom: calc(env(safe-area-inset-bottom, 0px) + clamp(16px, 3vw, 28px) + 70px);
  z-index: 74;
  width: 252px;
  display: grid;
  gap: 8px;
  padding: 15px;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow:
    0 30px 60px -30px rgba(30, 18, 8, 0.5),
    0 2px 8px rgba(30, 18, 8, 0.08);
  animation: popIn 0.24s var(--ease);
}

.edit-menu[hidden] {
  display: none;
}

@keyframes popIn {
  from {
    opacity: 0;
    transform: translateY(8px) scale(0.98);
  }
}

.edit-menu__title {
  margin: 0;
  font-family: var(--font-serif);
  font-size: 15px;
  letter-spacing: 0.04em;
}

.edit-menu__hint {
  margin: -2px 0 4px;
  font-size: 11.5px;
  line-height: 1.7;
  color: var(--ink-faint);
}

.edit-menu__action {
  padding: 8px 10px;
  text-align: left;
  font: inherit;
  font-size: 12.5px;
  letter-spacing: 0.03em;
  color: var(--ink);
  background: transparent;
  border: 1px solid var(--line);
  border-radius: 3px;
  cursor: pointer;
  transition:
    color 0.25s,
    border-color 0.25s;
}

.edit-menu__action:hover {
  color: var(--accent);
  border-color: var(--accent);
}

.edit-menu__action--quiet {
  color: var(--ink-faint);
  border-style: dashed;
}

.edit-menu__note {
  margin: 4px 0 0;
  font-size: 10.5px;
  line-height: 1.7;
  color: var(--ink-faint);
}

/* 编辑面板 */
.editor-panel {
  position: fixed;
  right: clamp(16px, 3vw, 28px);
  bottom: calc(env(safe-area-inset-bottom, 0px) + clamp(16px, 3vw, 28px) + 70px);
  z-index: 76;
  width: min(382px, calc(100vw - 32px));
  max-height: min(74vh, 720px);
  display: flex;
  flex-direction: column;
  background: var(--card);
  color: var(--ink);
  border: 1px solid var(--line);
  border-radius: 10px;
  overflow: hidden;
  box-shadow:
    0 34px 70px -34px rgba(30, 18, 8, 0.55),
    0 2px 10px rgba(30, 18, 8, 0.1);
  animation: panelIn 0.28s var(--ease);
}

.editor-panel[hidden] {
  display: none;
}

@keyframes panelIn {
  from {
    opacity: 0;
    transform: translateY(12px) scale(0.99);
  }
}

.editor-panel__head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 12px;
  padding: 16px 18px 13px;
  border-bottom: 1px solid var(--line-soft);
}

.editor-panel__kicker {
  margin: 0 0 4px;
  font-size: 9.5px;
  letter-spacing: 0.2em;
  color: var(--accent);
  text-transform: uppercase;
}

.editor-panel__title {
  margin: 0;
  font-family: var(--font-serif);
  font-weight: 500;
  font-size: 17px;
  line-height: 1.35;
  letter-spacing: 0.03em;
}

.editor-panel__close {
  flex: none;
  width: 28px;
  height: 28px;
  display: grid;
  place-items: center;
  padding: 0;
  font-size: 20px;
  line-height: 1;
  color: var(--ink-faint);
  background: transparent;
  border: 1px solid transparent;
  border-radius: 50%;
  cursor: pointer;
  transition:
    color 0.25s,
    border-color 0.25s;
}

.editor-panel__close:hover {
  color: var(--ink);
  border-color: var(--line);
}

.editor-panel__body {
  display: grid;
  gap: 14px;
  padding: 16px 18px;
  overflow-y: auto;
  overscroll-behavior: contain;
}

.ed-field {
  display: grid;
  gap: 6px;
}

.ed-field__label {
  font-family: var(--font-mono);
  font-size: 9.5px;
  letter-spacing: 0.16em;
  color: var(--ink-faint);
  text-transform: uppercase;
}

.ed-input {
  width: 100%;
  padding: 8px 10px;
  font: inherit;
  font-size: 14px;
  line-height: 1.55;
  color: var(--ink);
  background: color-mix(in srgb, var(--paper) 55%, transparent);
  border: 1px solid var(--line);
  border-radius: 3px;
  transition:
    border-color 0.25s,
    box-shadow 0.25s;
}

textarea.ed-input {
  min-height: 76px;
  resize: vertical;
}

.ed-input:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--accent) 18%, transparent);
}

.ed-field__hint {
  font-size: 10.5px;
  line-height: 1.6;
  color: var(--ink-faint);
}

.ed-photo {
  display: grid;
  grid-template-columns: 88px minmax(0, 1fr);
  gap: 12px;
  align-items: start;
}

.ed-photo__preview {
  width: 88px;
  aspect-ratio: 1;
  display: grid;
  place-items: center;
  overflow: hidden;
  background: var(--paper-deep);
  border: 1px solid var(--line);
  border-radius: 3px;
}

.ed-photo__preview img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.ed-photo__empty {
  font-family: var(--font-mono);
  font-size: 9px;
  letter-spacing: 0.12em;
  color: var(--ink-faint);
}

.ed-photo__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 8px;
}

.ed-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 7px 12px;
  font: inherit;
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--ink);
  background: transparent;
  border: 1px solid var(--line);
  border-radius: 3px;
  cursor: pointer;
  transition:
    color 0.25s,
    border-color 0.25s,
    background 0.25s,
    opacity 0.25s;
}

.ed-btn:hover {
  color: var(--accent);
  border-color: var(--accent);
}

.ed-btn:disabled {
  opacity: 0.5;
  cursor: wait;
}

.ed-btn--quiet {
  color: var(--ink-faint);
  border-style: dashed;
}

.ed-btn--ghost {
  color: var(--ink-soft);
}

.ed-btn--primary {
  color: var(--paper);
  background: var(--ink);
  border-color: var(--ink);
}

.ed-btn--primary:hover {
  color: var(--paper);
  background: var(--accent);
  border-color: var(--accent);
}

.editor-panel__foot {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 8px;
  padding: 13px 18px 16px;
  border-top: 1px solid var(--line-soft);
}

.editor-panel__local {
  margin-right: auto;
  font-size: 9px;
  letter-spacing: 0.14em;
  color: var(--ink-faint);
}

/* 提示 */
.toast {
  position: fixed;
  left: 50%;
  bottom: 26px;
  z-index: 96;
  max-width: calc(100vw - 40px);
  transform: translate(-50%, 12px);
  padding: 9px 16px;
  border-radius: 999px;
  background: var(--ink);
  color: var(--paper);
  font-size: 12.5px;
  letter-spacing: 0.04em;
  text-align: center;
  opacity: 0;
  pointer-events: none;
  transition:
    opacity 0.25s var(--ease),
    transform 0.25s var(--ease);
}

.toast.is-on {
  opacity: 1;
  transform: translate(-50%, 0);
}

@media (max-width: 640px) {
  .hero__title--long {
    font-size: clamp(38px, 12.6vw, 64px);
  }

  .editor-panel {
    left: 10px;
    right: 10px;
    bottom: calc(env(safe-area-inset-bottom, 0px) + 10px);
    width: auto;
    max-height: 82vh;
    border-radius: 12px;
  }

  .edit-menu {
    right: 12px;
    bottom: calc(env(safe-area-inset-bottom, 0px) + 86px);
    width: min(262px, calc(100vw - 24px));
  }

  body.editor-open .toast {
    top: 70px;
    bottom: auto;
  }
}

@media (prefers-reduced-motion: reduce) {
  .editor-panel,
  .edit-menu,
  .toast,
  .edit-fab {
    animation: none !important;
  }
}