/* ============================================================
   MAGEHC · 暗色液态玻璃
   设计原则：底色近黑、界面无彩，所有颜色来自照片本身。
   ============================================================ */

/* 英文：Space Grotesk（Anthropic Styrene 气质的开源替代）
   中文：思源黑体（构建时按用到的字符子集化，只有一两百 KB） */
@font-face {
  font-family: "Space Grotesk";
  src: url("/assets/fonts/latin.woff2") format("woff2");
  font-weight: 300 700;
  font-display: swap;
}
@font-face {
  font-family: "Noto Sans SC";
  src: url("/assets/fonts/cjk.woff2") format("woff2");
  font-weight: 100 900;
  font-display: swap;
}

:root {
  --bg: #07080c;
  --bg-elev: #0e1016;
  --ink: #f2f4f8;
  --ink-2: #a8afbc;
  --ink-3: #757d8b;
  --line: rgba(255, 255, 255, 0.09);
  --glass-bg: rgba(255, 255, 255, 0.055);
  --glass-hi: rgba(255, 255, 255, 0.14);
  --radius: 22px;
  --sans: "Space Grotesk", "Noto Sans SC", -apple-system, BlinkMacSystemFont, "PingFang SC",
    "HarmonyOS Sans SC", "MiSans", "Microsoft YaHei UI", "Microsoft YaHei", system-ui, sans-serif;
  --mono: "Space Grotesk", "Noto Sans SC", ui-monospace, "SF Mono", Consolas, monospace;
  --code: ui-monospace, "SF Mono", "Cascadia Code", Consolas, "JetBrains Mono", monospace;
  --w: 1080px;
  --pad: 24px;
}

* { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
  /* 始终预留滚动条位置：避免长短页面切换时视口宽度变化，导致居中的导航胶囊横向跳动 */
  scrollbar-gutter: stable;
  /* 画布兜底色：页面过渡的快照若有透明间隙，露出的是深色而不是浏览器默认的白色 */
  background: var(--bg);
  /* 告知浏览器这是暗色站点：文档间导航的首帧画布用深色，杜绝首次切换闪白 */
  color-scheme: dark;
}

body {
  margin: 0;
  /* 背景色只放在 html 上：body 若有不透明背景，会按绘制顺序盖住
     所有 z-index 为负的光晕层（负层元素画在普通元素背景之下） */
  color: var(--ink);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

/* 细颗粒噪点，让玻璃更有质感 */
body::after {
  content: "";
  position: fixed;
  inset: 0;
  z-index: 999;
  pointer-events: none;
  opacity: 0.05;
  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='0.9' numOctaves='2'/%3E%3C/filter%3E%3Crect width='160' height='160' filter='url(%23n)' opacity='0.6'/%3E%3C/svg%3E");
}

::selection { background: rgba(255, 255, 255, 0.22); }

a { color: inherit; text-decoration: none; }

:focus-visible {
  outline: 2px solid rgba(255, 255, 255, 0.8);
  outline-offset: 3px;
  border-radius: 6px;
}

.mono {
  font-family: var(--mono);
  font-feature-settings: "tnum";
  letter-spacing: 0.03em;
}

.meta { color: var(--ink-3); font-size: 0.82rem; }
.note { margin-top: 12px; }

.skip-link {
  position: fixed;
  top: -60px;
  left: 16px;
  z-index: 1000;
  padding: 10px 18px;
  border-radius: 12px;
  background: var(--bg-elev);
  transition: top 0.2s;
}
.skip-link:focus { top: 16px; }

/* ---------------- 玻璃 ---------------- */

.glass {
  background: var(--glass-bg);
  -webkit-backdrop-filter: blur(26px) saturate(1.7);
  backdrop-filter: blur(26px) saturate(1.7);
  border: 1px solid var(--line);
  box-shadow:
    inset 0 1px 0 var(--glass-hi),
    0 14px 44px rgba(0, 0, 0, 0.45);
  border-radius: var(--radius);
}

/* 照片透出的环境光 —— 本站的签名元素 */
.ambient {
  position: absolute;
  inset: -10%;
  z-index: -1;
  overflow: hidden;
  border-radius: 48px;
  pointer-events: none;
}
/* 图片本身是 24px 的微缩图，拉伸放大后天然柔和，无需昂贵的大半径模糊；
   径向蒙版把边缘羽化成透明，避免出现色块硬边 */
.ambient img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: saturate(1.6) brightness(0.9);
  opacity: 0.5;
  transform: scale(1.15);
  -webkit-mask-image: radial-gradient(ellipse at center, #000 30%, transparent 72%);
  mask-image: radial-gradient(ellipse at center, #000 30%, transparent 72%);
}

/* 卡片光晕：默认熄灭，悬停/聚焦时亮起（配合上浮动效，像卡片被点亮）；
   以卡片为中心向四周均匀散开 */
.trip-card .ambient {
  inset: -12% -9%;
}
.trip-card .ambient img {
  opacity: 0;
  transition: opacity 0.5s ease;
  /* closest-side：渐变在盒子边缘处恰好结束，90% 就已全透明，不会被边界裁出硬边 */
  -webkit-mask-image: radial-gradient(ellipse closest-side at center, #000 25%, transparent 90%);
  mask-image: radial-gradient(ellipse closest-side at center, #000 25%, transparent 90%);
}
.trip-card:hover .ambient img,
.trip-card:focus-visible .ambient img {
  opacity: 0.6;
}

/* ---------------- 导航 ---------------- */

.nav {
  position: fixed;
  top: 18px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 100;
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 7px 9px 7px 20px;
  border-radius: 999px;
  max-width: calc(100vw - 24px);
}

.brand {
  font-family: var(--mono);
  font-weight: 700;
  font-size: 0.92rem;
  letter-spacing: 0.14em;
}

.nav-links { display: flex; gap: 2px; }

.nav-links a {
  position: relative;
  padding: 7px 15px;
  border-radius: 999px;
  font-size: 0.88rem;
  color: var(--ink-2);
  transition: background 0.25s, color 0.25s;
  white-space: nowrap;
}
.nav-links a:hover { background: rgba(255, 255, 255, 0.07); color: var(--ink); }
.nav-links a.active { color: var(--ink); }

/* 高亮玻璃底是独立元素：过渡时只有它滑动变形，文字留在原地淡化 */
.nav-links .pill {
  position: absolute;
  inset: 0;
  z-index: -1;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.12);
  view-transition-name: nav-active;
}

/* ---------------- 版心与页面头部 ---------------- */

main { display: block; }

.page-head,
.home-sec,
.intro,
.timeline,
.page-list,
.article,
.empty,
.trip-head,
.day {
  width: min(var(--w), 100% - var(--pad) * 2);
  margin-inline: auto;
}

.page-head { padding-top: 148px; }
.page-head h1 {
  margin: 0;
  font-size: clamp(2.1rem, 5vw, 2.9rem);
  font-weight: 700;
  letter-spacing: -0.02em;
}
.page-head .meta { margin: 10px 0 0; }
.page-head .back { display: inline-block; margin-bottom: 22px; }

.back {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 8px 17px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid var(--line);
  box-shadow: inset 0 1px 0 var(--glass-hi);
  color: var(--ink-2);
  font-size: 0.78rem;
  transition: background 0.25s, color 0.25s, border-color 0.25s;
}
.back:hover {
  background: rgba(255, 255, 255, 0.13);
  border-color: rgba(255, 255, 255, 0.2);
  color: var(--ink);
}
.back-arrow { transition: transform 0.25s cubic-bezier(0.2, 0.7, 0.2, 1); }
.back:hover .back-arrow { transform: translateX(-3px); }

/* 页头下的信息芯片：比卡片上的略大一号 */
.head-chips { margin-top: 18px; }
.head-chips .chip {
  font-size: 0.75rem;
  padding: 6px 14px;
  background: rgba(255, 255, 255, 0.06);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.09);
}

/* ---------------- 首页 Hero ---------------- */

.hero {
  position: relative;
  height: min(88vh, 940px);
  min-height: 520px;
}

.hero-img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.hero-shade {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(rgba(5, 6, 9, 0.5), transparent 32%),
    linear-gradient(transparent 45%, var(--bg) 98%);
}

.hero-card {
  position: absolute;
  bottom: 44px;
  left: max(var(--pad), (100% - var(--w)) / 2);
  max-width: min(560px, calc(100% - var(--pad) * 2));
  padding: 26px 30px 28px;
}

.hero-card h1 {
  margin: 6px 0 14px;
  font-size: clamp(2rem, 5vw, 3.2rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.15;
}

.eyebrow {
  margin: 0;
  font-size: 0.72rem;
  letter-spacing: 0.16em;
  color: var(--ink-2);
  text-transform: uppercase;
}

.hero-empty {
  height: auto;
  min-height: 0;
  padding: 200px 0 60px;
  display: grid;
  place-items: center;
}
.hero-empty .hero-card { position: static; text-align: center; }
.hero-sub { color: var(--ink-2); margin: 8px 0 0; }

.btn {
  display: inline-block;
  margin-top: 18px;
  padding: 10px 22px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.13);
  border: 1px solid rgba(255, 255, 255, 0.16);
  box-shadow: inset 0 1px 0 var(--glass-hi);
  font-size: 0.9rem;
  transition: background 0.25s, transform 0.25s;
}
.btn:hover { background: rgba(255, 255, 255, 0.2); transform: translateY(-1px); }

.intro { padding: 88px var(--pad) 20px; }
.site-line {
  margin: 0;
  text-align: center;
  font-size: clamp(1.3rem, 3vw, 1.9rem);
  font-weight: 300;
  letter-spacing: 0.04em;
  color: var(--ink-2);
}

/* ---------------- 区块 ---------------- */

.home-sec { padding-top: 88px; }

.sec-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  margin-bottom: 26px;
}
.sec-head h2 {
  margin: 0;
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: -0.01em;
}
.more { color: var(--ink-3); font-size: 0.8rem; transition: color 0.25s; }
.more:hover { color: var(--ink); }

/* ---------------- 旅行卡片 ---------------- */

.trip-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 26px;
}

.trip-card {
  position: relative;
  /* 独立层叠上下文：让 z-index:-1 的光晕留在卡片内部，不受全局背景影响 */
  z-index: 0;
  display: block;
  border-radius: var(--radius);
  transition: transform 0.4s cubic-bezier(0.2, 0.7, 0.2, 1);
}
.trip-card:hover { transform: translateY(-5px); }

.trip-cover {
  margin: 0;
  border-radius: var(--radius);
  overflow: hidden;
  aspect-ratio: 3 / 2;
  background: var(--bg-elev);
  border: 1px solid var(--line);
}
.trip-cover img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.6s cubic-bezier(0.2, 0.7, 0.2, 1);
}
.trip-card:hover .trip-cover img { transform: scale(1.035); }

.trip-info {
  position: absolute;
  left: 12px;
  right: 12px;
  bottom: 12px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  padding: 12px 18px;
  border-radius: 16px;
}
.trip-text h3 { margin: 0; font-size: 1.02rem; font-weight: 600; }
.trip-text .meta { margin: 3px 0 0; font-size: 0.72rem; }

.chips { display: flex; flex-wrap: wrap; gap: 6px; }
.chip {
  padding: 3px 11px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.07);
  border: 1px solid rgba(255, 255, 255, 0.09);
  color: var(--ink-2);
  font-size: 0.68rem;
  white-space: nowrap;
}

/* ---------------- 相册时间线 ---------------- */

.timeline { padding-top: 40px; }

.year-group {
  display: grid;
  grid-template-columns: 76px 1fr;
  gap: 20px;
  padding-bottom: 56px;
}

.year {
  position: sticky;
  top: 96px;
  align-self: start;
  margin: 0;
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--ink-3);
}

.year-trips {
  position: relative;
  display: grid;
  gap: 44px;
  padding-left: 30px;
  border-left: 1px solid var(--line);
}

.year-trips > .trip-card::before {
  content: "";
  position: absolute;
  left: -34px;
  top: 26px;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--ink-3);
  box-shadow: 0 0 0 4px var(--bg);
}

/* ---------------- 单次旅程 ---------------- */

.trip-head {
  position: relative;
  z-index: 0;
  padding: 150px 0 28px;
}
.trip-head .ambient {
  inset: -60px -24% auto;
  height: 140%;
  border-radius: 0;
}
.trip-head .ambient img {
  -webkit-mask-image: radial-gradient(ellipse 60% 70% at 50% 30%, #000 25%, transparent 75%);
  mask-image: radial-gradient(ellipse 60% 70% at 50% 30%, #000 25%, transparent 75%);
}
.trip-head h1 {
  margin: 18px 0 8px;
  font-size: clamp(2.1rem, 5vw, 3rem);
  font-weight: 700;
  letter-spacing: -0.02em;
}
.trip-head .chips { margin-top: 14px; }
.trip-desc { color: var(--ink-2); max-width: 640px; margin: 16px 0 0; }
.trip-body { margin-top: 16px; max-width: 640px; }

.day { padding-top: 26px; }

.day-label {
  position: sticky;
  top: 86px;
  z-index: 5;
  display: inline-flex;
  align-items: baseline;
  gap: 12px;
  margin: 0 0 18px;
  padding: 8px 18px;
  border-radius: 999px;
  font-size: 0.95rem;
  font-weight: 600;
}
.day-label .mono {
  font-size: 0.7rem;
  letter-spacing: 0.16em;
  color: var(--ink-3);
}

.masonry {
  column-count: 3;
  column-gap: 16px;
}

.ph {
  position: relative;
  display: block;
  break-inside: avoid;
  margin: 0 0 16px;
  border-radius: 14px;
  overflow: hidden;
  background: var(--bg-elev);
  border: 1px solid rgba(255, 255, 255, 0.06);
}
.ph img {
  display: block;
  width: 100%;
  height: auto;
  transition: transform 0.6s cubic-bezier(0.2, 0.7, 0.2, 1);
}
.ph:hover img { transform: scale(1.02); }

.ph-meta {
  position: absolute;
  left: 10px;
  bottom: 10px;
  padding: 4px 12px;
  border-radius: 999px;
  background: rgba(10, 11, 15, 0.55);
  -webkit-backdrop-filter: blur(14px);
  backdrop-filter: blur(14px);
  border: 1px solid rgba(255, 255, 255, 0.12);
  font-size: 0.66rem;
  color: var(--ink);
  opacity: 0;
  transform: translateY(5px);
  transition: opacity 0.3s, transform 0.3s;
  pointer-events: none;
  max-width: calc(100% - 20px);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.ph:hover .ph-meta,
.ph:focus-visible .ph-meta { opacity: 1; transform: none; }

/* ---------------- 文章列表 ---------------- */

.post-list { display: grid; gap: 14px; }
.page-list { padding-top: 36px; }

.post-row {
  display: grid;
  grid-template-columns: 92px 1fr auto;
  align-items: center;
  gap: 22px;
  padding: 18px 24px;
  border-radius: 18px;
  transition: transform 0.3s, border-color 0.3s;
}
.post-row:hover { transform: translateY(-2px); border-color: rgba(255, 255, 255, 0.18); }
.post-row time { color: var(--ink-3); font-size: 0.76rem; }
.post-row-text h3 { margin: 0; font-size: 1.05rem; font-weight: 600; }
.post-row-text p {
  margin: 4px 0 0;
  font-size: 0.84rem;
  color: var(--ink-2);
  display: -webkit-box;
  -webkit-line-clamp: 1;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.post-row .arrow { color: var(--ink-3); transition: transform 0.3s, color 0.3s; }
.post-row:hover .arrow { transform: translateX(4px); color: var(--ink); }

/* ---------------- 文章正文 ---------------- */

.article { max-width: min(780px, 100% - var(--pad) * 2); }

.article-card {
  margin-top: 34px;
  padding: clamp(26px, 5vw, 52px);
}

.prose { color: #d6dae2; }
.prose p { line-height: 1.95; margin: 1.1em 0; }
.prose h2, .prose h3 { color: var(--ink); letter-spacing: -0.01em; margin: 1.8em 0 0.6em; }
.prose h2 { font-size: 1.4rem; }
.prose h3 { font-size: 1.15rem; }
.prose a { text-decoration: underline; text-underline-offset: 4px; text-decoration-color: var(--ink-3); }
.prose a:hover { text-decoration-color: var(--ink); }
.prose code {
  font-family: var(--code);
  font-size: 0.86em;
  background: rgba(255, 255, 255, 0.08);
  padding: 2px 7px;
  border-radius: 6px;
}
.prose pre {
  font-family: var(--code);
  background: rgba(0, 0, 0, 0.45);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 18px 22px;
  overflow-x: auto;
  line-height: 1.6;
}
.prose pre code { background: none; padding: 0; }
.prose img { max-width: 100%; border-radius: 14px; }
.prose blockquote {
  margin: 1.2em 0;
  padding-left: 18px;
  border-left: 2px solid rgba(255, 255, 255, 0.25);
  color: var(--ink-2);
}
.prose hr { border: 0; border-top: 1px solid var(--line); margin: 2.2em 0; }
.prose ul, .prose ol { padding-left: 1.4em; }
.prose li { margin: 0.35em 0; }

/* ---------------- 空状态 / 404 ---------------- */

.empty {
  max-width: 520px;
  margin-top: 48px;
  padding: 44px 36px;
  text-align: center;
}
.empty p { margin: 6px 0; }
.empty code {
  font-family: var(--mono);
  font-size: 0.85em;
  background: rgba(255, 255, 255, 0.08);
  padding: 2px 7px;
  border-radius: 6px;
}

.notfound { margin-top: 170px; }
.notfound .mono { font-size: 2.6rem; color: var(--ink-3); letter-spacing: 0.2em; }

.footer {
  margin: 130px var(--pad) 34px;
  text-align: center;
  color: var(--ink-3);
  font-size: 0.78rem;
}

/* ---------------- 液态玻璃光标 ---------------- */

/* 挂件绳链画布 */
.stardust {
  position: fixed;
  inset: 0;
  z-index: 1000;
  pointer-events: none;
}

/* 启用自定义光标时隐藏系统光标；灯箱在顶层之上画不到，恢复系统光标 */
html.cursor-fx,
html.cursor-fx * { cursor: none !important; }
html.cursor-fx dialog,
html.cursor-fx dialog * { cursor: auto !important; }

/* 玻璃圆点：悬停可点元素时由 JS 改宽高圆角，CSS 过渡完成磁吸变形 */
.glass-cursor {
  position: fixed;
  left: 0;
  top: 0;
  width: 15px;
  height: 15px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.09);
  border: 1px solid rgba(255, 255, 255, 0.5);
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.45),
    0 4px 18px rgba(0, 0, 0, 0.4);
  -webkit-backdrop-filter: blur(4px) saturate(1.5);
  backdrop-filter: blur(4px) saturate(1.5);
  z-index: 1001;
  pointer-events: none;
  opacity: 0;
  transition:
    width 0.32s cubic-bezier(0.2, 0.7, 0.2, 1),
    height 0.32s cubic-bezier(0.2, 0.7, 0.2, 1),
    border-radius 0.32s cubic-bezier(0.2, 0.7, 0.2, 1),
    opacity 0.25s ease;
}
html.cursor-on .glass-cursor { opacity: 1; }

/* 框选状态：只留玻璃边框，去掉模糊和底色，保证被框元素的文字清晰可读 */
.glass-cursor.framed {
  -webkit-backdrop-filter: none;
  backdrop-filter: none;
  background: rgba(255, 255, 255, 0.04);
}

/* ---------------- 灯箱 ---------------- */

.lightbox {
  border: none;
  padding: 0;
  background: transparent;
  max-width: 100vw;
  max-height: 100vh;
  width: 100vw;
  height: 100vh;
  color: var(--ink);
  overflow: hidden;
}
.lightbox::backdrop {
  background: rgba(4, 5, 8, 0.9);
  -webkit-backdrop-filter: blur(28px);
  backdrop-filter: blur(28px);
  animation: lb-fade 0.35s ease;
}
.lightbox[open] {
  animation: lb-in 0.35s cubic-bezier(0.2, 0.7, 0.2, 1);
}
@keyframes lb-in {
  from { opacity: 0; transform: scale(0.97); }
}
@keyframes lb-fade {
  from { opacity: 0; }
}

.lb-stage {
  margin: 0;
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  padding: 30px 76px 108px;
}
.lb-stage img {
  max-width: 100%;
  max-height: 100%;
  border-radius: 10px;
  box-shadow: 0 30px 90px rgba(0, 0, 0, 0.6);
}

.lightbox button {
  position: absolute;
  z-index: 3;
  width: 46px;
  height: 46px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.07);
  -webkit-backdrop-filter: blur(18px);
  backdrop-filter: blur(18px);
  color: var(--ink);
  font-size: 1.25rem;
  line-height: 1;
  cursor: pointer;
  transition: background 0.25s;
  font-family: var(--sans);
}
.lightbox button:hover { background: rgba(255, 255, 255, 0.16); }
.lb-close { top: 18px; right: 18px; }
.lb-prev { left: 16px; top: 50%; transform: translateY(-50%); }
.lb-next { right: 16px; top: 50%; transform: translateY(-50%); }

.lb-bar {
  position: absolute;
  left: 50%;
  bottom: 22px;
  transform: translateX(-50%);
  z-index: 2;
  display: flex;
  align-items: center;
  gap: 16px;
  max-width: calc(100vw - 28px);
  padding: 10px 20px;
  border-radius: 999px;
  font-size: 0.72rem;
}
.lb-count { color: var(--ink-3); flex-shrink: 0; }
.lb-exif {
  display: flex;
  flex-wrap: wrap;
  gap: 4px 14px;
  color: var(--ink-2);
  justify-content: center;
}
.lb-orig { color: var(--ink-3); text-decoration: underline; text-underline-offset: 3px; flex-shrink: 0; }
.lb-orig:hover { color: var(--ink); }

/* ---------------- 页面切换动画（View Transitions） ---------------- */

@view-transition {
  navigation: auto;
}

/* 整页交叉淡化用浏览器默认动画：新旧快照等时长、plus-lighter 混合，
   数学上严格互补，不会露底闪白（此前自定义的不对称时长正是闪白根因）。

   高亮玻璃底（.pill，纯色圆角矩形、不含文字）单独做液态滑动变形；
   新旧样式完全相同，关掉交叉淡化只保留位移，滑动全程无痕。
   （注意：绝不能给带 backdrop-filter 的整条导航命名——快照不渲染毛玻璃） */
/* 过渡舞台兜底色：任何快照没盖住的帧，露出的都是深色而非白色 */
::view-transition {
  background-color: var(--bg);
}

::view-transition-group(nav-active) {
  animation-duration: 0.35s;
  animation-timing-function: cubic-bezier(0.2, 0.7, 0.2, 1);
}
::view-transition-old(nav-active),
::view-transition-new(nav-active) {
  animation: none;
  height: 100%;
}
::view-transition-old(nav-active) { opacity: 0; }

/* ---------------- 入场动画 ---------------- */

html.js .reveal {
  opacity: 0;
  transform: translateY(18px);
}
html.js .reveal.in {
  opacity: 1;
  transform: none;
  transition: opacity 0.7s ease, transform 0.7s cubic-bezier(0.2, 0.7, 0.2, 1);
  transition-delay: var(--reveal-delay, 0s);
}

/* ---------------- 响应式 ---------------- */

@media (max-width: 1000px) {
  .masonry { column-count: 2; }
}

@media (max-width: 720px) {
  .nav { gap: 6px; padding-left: 16px; }
  .brand { font-size: 0.8rem; }
  .nav-links a { padding: 7px 10px; font-size: 0.8rem; }

  .trip-grid { grid-template-columns: 1fr; }

  .year-group { grid-template-columns: 1fr; gap: 6px; }
  .year { position: static; }
  .year-trips { padding-left: 0; border-left: none; }
  .year-trips > .trip-card::before { display: none; }

  .trip-info { flex-direction: column; align-items: flex-start; gap: 8px; }

  .post-row { grid-template-columns: 1fr auto; padding: 16px 18px; }
  .post-row time { grid-column: 1 / -1; }

  .hero { height: 72vh; min-height: 440px; }
  .hero-card { bottom: 24px; }

  .lb-stage { padding: 16px 8px 118px; }
  .lb-prev { top: auto; bottom: 24px; left: 14px; transform: none; }
  .lb-next { right: auto; top: auto; bottom: 24px; left: 68px; transform: none; }
  .lb-bar { left: 8px; right: 8px; transform: none; max-width: none; justify-content: center; bottom: 84px; }
}

@media (max-width: 460px) {
  .masonry { column-count: 1; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { transition: none !important; animation: none !important; }
  html.js .reveal { opacity: 1; transform: none; }
  ::view-transition-group(*),
  ::view-transition-old(*),
  ::view-transition-new(*) { animation: none !important; }
}