/* 雨滴·手记 —— 全站样式
   设计令牌沿用视觉原型：色板 / 字号 / 断点均以 CSS 变量定义，
   新增页面（归档 / 关于 / 搜索 / 404）复用同一套变量。 */

:root {
  --bg: #f7f6f3;
  --bg-raised: #ffffff;
  --ink: #232326;
  --ink-soft: #6e6e72;
  --ink-faint: #a6a4a0;
  --line: #e0ddd6;

  --sakura: #db6e93;
  --sakura-soft: #fbe7ed;
  --sakura-text: #c4779a;

  --lake: #2e7a94;
  --lake-soft: #e5f1f4;
  --lake-text: #4e93a6;

  --max-w: 760px;

  /* 通用导航栏 / 页面外壳宽度：与详情页同为 980，独立于欢迎页的 1180 */
  --shell-w: 980px;

  /* 代码块：独立于站点主题的固定深色面板 */
  --code-bg: #22252b;
  --code-ink: #d8dce2;
  --code-comment: #6c7280;
  --code-keyword: #7fc3de;
  --code-string: #e9a0bc;
  --code-func: #e6c88a;

  --fs-nav: 17px;
  --fs-brand: 20px;
  --fs-badge: 14px;
  --fs-h1: 38px;
  --fs-meta: 14px;
  --fs-body: 19px;
  --fs-h2: 23px;
  --fs-h3: 18.5px;
  --fs-tag: 14px;
  --fs-hero-title: 48px;
  --fs-hero-body: 17px;
  --fs-hero-link: 15px;
  --fs-label: 14px;
  --fs-post-title: 20px;
  --fs-date: 14px;
  --fs-footer: 14px;
  --fs-year: 44px;
  --fs-page-title: 34px;
  --fs-welcome-title: 56px;
}

html[data-theme="dark"] {
  --bg: #17171a;
  --bg-raised: #1e1e22;
  --ink: #ececee;
  --ink-soft: #97979c;
  --ink-faint: #5b5b60;
  --line: #2c2c30;

  --sakura: #f08fae;
  --sakura-soft: #34232b;
  --sakura-text: #eba2bc;

  --lake: #5fc2e0;
  --lake-soft: #1b323b;
  --lake-text: #82cbe2;
}

* {
  box-sizing: border-box;
}

html {
  scrollbar-gutter: stable;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: "Noto Sans SC", sans-serif;
  font-weight: 300;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  transition:
    background 0.2s ease,
    color 0.2s ease;
  position: relative;
  overflow-x: hidden;
}

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

.serif {
  font-family: "Fraunces", "Noto Serif SC", serif;
}

/* ── 飘落花瓣 ─────────────────────────────── */

.petal-field {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 720px;
  pointer-events: none;
  z-index: 5;
  overflow: hidden;
}

/* 首页：全屏持续飘落 */
.petal-field--full {
  position: fixed;
  inset: 0;
  height: auto;
  z-index: 40;
}

.petal {
  position: absolute;
  top: -5%;
  opacity: 0;
  animation:
    petal-fall linear infinite,
    petal-sway ease-in-out infinite;
  will-change: transform, opacity;
}

.petal svg {
  display: block;
  width: 100%;
  height: 100%;
  fill: var(--sakura);
}

@keyframes petal-fall {
  0% {
    transform: translateY(-8vh) rotate(0deg);
    opacity: 0;
  }
  6% {
    opacity: 0.7;
  }
  92% {
    opacity: 0.5;
  }
  100% {
    transform: translateY(108vh) rotate(320deg);
    opacity: 0;
  }
}

@keyframes petal-sway {
  0%,
  100% {
    margin-left: 0px;
  }
  50% {
    margin-left: 40px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .petal-field {
    display: none;
  }
}

/* ── Header ───────────────────────────────── */

header {
  max-width: var(--shell-w);
  margin: 0 auto;
  padding: 28px 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-bottom: 1px solid var(--line);
  position: relative;
  z-index: 10;
  background: var(--bg);
}

/* 详情页等宽屏页面：头部与正文 + TOC 外壳同宽 */
body.wide header,
body.wide .page-shell {
  max-width: 980px;
}

.brand {
  font-family: "Fraunces", serif;
  font-size: var(--fs-brand);
  font-weight: 500;
  letter-spacing: 0.02em;
  white-space: nowrap;
}

.brand .dot {
  color: var(--sakura);
}

.header-right {
  display: flex;
  align-items: center;
  gap: 18px;
}

nav.desktop-nav {
  display: flex;
  gap: 22px;
  font-size: var(--fs-nav);
  color: var(--ink-soft);
}

nav.desktop-nav a {
  position: relative;
  padding-bottom: 2px;
  white-space: nowrap;
}

nav.desktop-nav a::after {
  content: "";
  position: absolute;
  left: 0;
  right: 100%;
  bottom: 0;
  height: 1px;
  background: var(--lake);
  transition: right 0.2s ease;
}

nav.desktop-nav a:hover {
  color: var(--lake);
}

nav.desktop-nav a:hover::after {
  right: 0;
}

.icon-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 30px;
  height: 30px;
  border-radius: 50%;
  border: 1px solid var(--line);
  background: var(--bg-raised);
  cursor: pointer;
  color: var(--ink-soft);
  font-size: 13px;
  transition:
    border-color 0.15s ease,
    color 0.15s ease;
}

.icon-btn:hover {
  border-color: var(--lake);
  color: var(--lake);
}

.hamburger {
  display: none;
}

.search-box {
  display: none;
  align-items: center;
  gap: 6px;
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 3px 12px;
  background: var(--bg-raised);
}

.search-box.open {
  display: flex;
}

.search-box form {
  display: flex;
  align-items: center;
  gap: 6px;
}

.search-box input {
  border: none;
  outline: none;
  background: transparent;
  font-family: inherit;
  font-size: 14px;
  color: var(--ink);
  width: 140px;
}

.search-box input::placeholder {
  color: var(--ink-soft);
}

.mobile-drawer {
  display: none;
  position: fixed;
  inset: 0;
  background: var(--bg);
  z-index: 50;
  padding: 24px;
  flex-direction: column;
  gap: 24px;
}

.mobile-drawer.open {
  display: flex;
}

.mobile-drawer .drawer-top {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.mobile-drawer nav {
  display: flex;
  flex-direction: column;
  gap: 20px;
  font-size: 20px;
  font-family: "Fraunces", "Noto Serif SC", serif;
}

.mobile-drawer nav a:hover {
  color: var(--lake);
}

@media (max-width: 760px) {
  nav.desktop-nav {
    display: none;
  }
  .hamburger {
    display: flex;
  }
}

/* ── 页面通用外壳 ─────────────────────────── */

.page-shell {
  max-width: var(--shell-w);
  margin: 0 auto;
  padding: 48px 24px 80px;
  position: relative;
  z-index: 6;
}

.page-heading {
  margin-bottom: 44px;
}

.page-heading h1 {
  font-family: "Fraunces", "Noto Serif SC", serif;
  font-size: var(--fs-page-title);
  font-weight: 380;
  line-height: 1.16;
  letter-spacing: -0.015em;
  margin: 0 0 14px;
}

.page-heading .page-meta {
  font-size: var(--fs-meta);
  color: var(--ink-faint);
  font-style: italic;
  margin: 0;
}

.section-label {
  max-width: var(--shell-w);
  margin: 52px auto 24px;
  padding: 0 24px;
  font-size: var(--fs-label);
  color: var(--ink-faint);
  display: flex;
  align-items: center;
  gap: 14px;
}

.section-label::after {
  content: "";
  flex: 1;
  height: 1px;
  background: var(--line);
}

/* ── Hero / 精选 ──────────────────────────── */

.hero {
  position: relative;
  max-width: var(--shell-w);
  margin: 0 auto;
  padding: 40px 24px 64px;
  border-bottom: 1px solid var(--line);
}

.hero-branch {
  position: absolute;
  top: -18px;
  right: 4px;
  width: 220px;
  height: 220px;
  pointer-events: none;
  /* 高于导航栏（z-index: 10），让探到导航横线上方的那段花枝不被导航栏背景盖住 */
  z-index: 11;
  opacity: 0.9;
}

.hero-branch .branch {
  stroke: var(--sakura);
  stroke-opacity: 0.55;
}

.hero-branch .petal-static {
  fill: var(--sakura);
}

html[data-theme="dark"] .hero-branch {
  opacity: 0.65;
}

.hero-content {
  position: relative;
  z-index: 1;
}

.hero-cover {
  width: 100%;
  aspect-ratio: 2.2 / 1;
  object-fit: cover;
  border-radius: 4px;
  border: 1px solid var(--line);
  margin-bottom: 28px;
  display: block;
}

/* 精选文章无封面时不渲染图片，文字部分上移占据整块区域 */
.hero--text {
  padding-top: 32px;
}

.hero--text .hero-content {
  max-width: 56ch;
}

.hero-meta {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: var(--fs-badge);
  color: var(--ink-faint);
  margin-bottom: 18px;
  font-style: italic;
}

.hero-meta .featured-mark {
  color: var(--sakura-text);
  font-weight: 600;
  font-style: normal;
}

.hero h1 {
  font-family: "Fraunces", "Noto Serif SC", serif;
  font-weight: 340;
  font-optical-sizing: auto;
  font-size: var(--fs-hero-title);
  line-height: 1.1;
  margin: 0 0 20px;
  letter-spacing: -0.02em;
}

.hero p {
  font-size: var(--fs-hero-body);
  color: var(--ink-soft);
  margin: 0 0 26px;
}

.read-link {
  font-size: var(--fs-hero-link);
  font-weight: 500;
  color: var(--lake);
  border-bottom: 1.5px solid var(--lake);
  padding-bottom: 2px;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition:
    gap 0.2s ease,
    color 0.15s ease,
    border-color 0.15s ease;
}

.read-link:hover {
  color: var(--lake-text);
  border-color: var(--lake-text);
  gap: 10px;
}

@media (prefers-reduced-motion: no-preference) {
  .fade-in {
    animation: fadeInUp 0.7s cubic-bezier(0.2, 0.7, 0.3, 1) both;
  }
  .fade-in.d1 {
    animation-delay: 0.05s;
  }
  .fade-in.d2 {
    animation-delay: 0.16s;
  }
  .fade-in.d3 {
    animation-delay: 0.28s;
  }
  .fade-in.d4 {
    animation-delay: 0.4s;
  }
  .fade-in.d5 {
    animation-delay: 0.52s;
  }
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(12px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ── 欢迎页（站点根路径）────────────────── */

.welcome {
  min-height: 72vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  text-align: center;
  padding: 64px 24px 96px;
  position: relative;
  z-index: 6;
}

.welcome-slogan {
  font-family: "Fraunces", "Noto Serif SC", serif;
  font-size: clamp(20px, 3.2vw, 34px);
  font-weight: 400;
  letter-spacing: 0.04em;
  color: var(--ink-soft);
  font-style: italic;
  margin: 0 0 44px;
}

.enter-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 20px;
  border: 1px solid var(--lake);
  border-radius: 999px;
  color: var(--lake);
  font-size: 13.5px;
  transition:
    background 0.2s ease,
    color 0.2s ease,
    gap 0.2s ease;
}

.enter-btn:hover {
  background: var(--lake);
  color: var(--bg-raised);
  gap: 14px;
}

/* 欢迎页专属（body.welcome-page，仅 index.html）：
   1180px 居中 header / 左上角花枝 / 底部海浪 */
body.welcome-page {
  min-height: 100vh;
}

body.welcome-page header {
  max-width: 1180px;
  padding: 36px 56px;
  /* 花枝探到导航栏下方，导航背景需透明才不会把它盖掉 */
  background: transparent;
}

/* 撑满首屏，让底部海浪贴住视口下沿（108px ≈ 收窄后 header 的高度） */
body.welcome-page .welcome {
  min-height: calc(100vh - 108px);
}

/* 与 /article 的 .hero-branch 是两套独立装饰，互不影响 */
.branch-corner {
  position: absolute;
  top: 0;
  left: 48px;
  width: 340px;
  height: 340px;
  z-index: 1;
  pointer-events: none;
  opacity: 0.9;
}

.branch-corner .branch {
  fill: none;
  stroke: var(--sakura);
  stroke-linecap: round;
  opacity: 0.55;
}

.branch-corner .branch-petal {
  fill: var(--sakura);
}

html[data-theme="dark"] .branch-corner {
  opacity: 0.6;
}

.sea {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 160px;
  z-index: 0;
  pointer-events: none;
  overflow: hidden;
}

.wave-layer {
  position: absolute;
  bottom: 0;
  left: 0;
  width: 200%;
  height: 100%;
  background: var(--lake);
  -webkit-mask-repeat: repeat-x;
  mask-repeat: repeat-x;
  -webkit-mask-size: 400px 100%;
  mask-size: 400px 100%;
  -webkit-mask-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 400 60' preserveAspectRatio='none'><path d='M0,30 C50,23 150,23 200,30 C250,37 350,37 400,30 L400,60 L0,60 Z'/></svg>");
  mask-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 400 60' preserveAspectRatio='none'><path d='M0,30 C50,23 150,23 200,30 C250,37 350,37 400,30 L400,60 L0,60 Z'/></svg>");
  animation: wave-scroll 34s linear infinite;
}

.wave-layer.back {
  bottom: 10px;
  height: 85%;
  opacity: 0.12;
  animation-duration: 46s;
  animation-direction: reverse;
}

.wave-layer.front {
  opacity: 0.2;
}

@keyframes wave-scroll {
  from {
    transform: translateX(0);
  }
  to {
    transform: translateX(-400px);
  }
}

/* 雨滴落海：雨滴层盖在海浪上方，水花（圆环 / 水珠）渲染在 .sea 内部 */
.rain-field {
  position: absolute;
  inset: 0;
  overflow: hidden;
  z-index: 1;
  pointer-events: none;
}

.rain-drop {
  position: absolute;
  top: 0;
  margin-left: -4.5px; /* 让 9px 宽的水滴以 x 为中心 */
  opacity: 0.75;
}

.rain-drop svg {
  display: block;
  width: 9px;
  height: 13px;
  fill: var(--lake);
}

.sea .rain-ring {
  position: absolute;
  width: 60px;
  height: 60px;
  border: 1px solid var(--lake);
  border-radius: 50%;
  transform: translate(-50%, -50%) scale(0.12);
  opacity: 0;
}

.sea .rain-splash {
  position: absolute;
  width: 3px;
  height: 3px;
  border-radius: 50%;
  background: var(--lake);
}

@media (max-width: 640px) {
  body.welcome-page header {
    padding: 36px 20px 24px;
  }
  .branch-corner {
    width: 220px;
    height: 220px;
    /* 移动端：向上越过导航分隔线、几乎贴住左边缘 */
    left: 10px;
    top: 76px;
  }
  .sea {
    height: 100px;
  }
}

/* ── 文章列表卡片 ─────────────────────────── */

.post-list {
  max-width: var(--shell-w);
  margin: 0 auto;
  padding: 0 24px 8px;
  display: flex;
  flex-direction: column;
  gap: 36px;
}

.post-card {
  display: grid;
  grid-template-columns: 200px 1fr;
  gap: 28px;
  align-items: center;
  padding-bottom: 36px;
  border-bottom: 1px solid var(--line);
}

.post-card:last-child {
  border-bottom: none;
  padding-bottom: 0;
}

.post-card:nth-child(even) {
  grid-template-columns: 1fr 200px;
}

.post-card:nth-child(even) .post-thumb {
  order: 2;
}

.post-card:nth-child(even) .post-main {
  order: 1;
}

.post-thumb {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  border-radius: 4px;
  border: 1px solid var(--line);
  display: block;
  transition: transform 0.4s ease;
}

/* 无封面：退化为纯文字单栏，不留图片位置 */
.post-card--text,
.post-card--text:nth-child(even) {
  grid-template-columns: 1fr;
}

.post-card:hover .post-thumb {
  transform: scale(1.02);
}

.post-main {
  min-width: 0;
}

.post-title {
  font-family: "Fraunces", "Noto Serif SC", serif;
  font-size: var(--fs-post-title);
  font-weight: 480;
  line-height: 1.32;
  margin: 0 0 12px;
  transition: color 0.15s ease;
}

.post-card:hover .post-title {
  color: var(--lake);
}

.post-excerpt {
  font-size: 16px;
  color: var(--ink-soft);
  margin: 0 0 14px;
  line-height: 1.65;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.post-sub {
  font-size: var(--fs-tag);
  color: var(--ink-faint);
  display: flex;
  gap: 8px;
  align-items: center;
  flex-wrap: wrap;
  font-style: italic;
}

.tag {
  color: var(--ink-faint);
}

.tag.pink {
  color: var(--sakura-text);
}

.tag.blue {
  color: var(--lake-text);
}

/* 标签 pill：浅色 / 圆润 / 轻微斜体，多标签允许换行 */
.post-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.tag-pill {
  display: inline-flex;
  align-items: center;
  padding: 1px 10px;
  border-radius: 999px;
  font-size: var(--fs-tag);
  font-style: italic;
  line-height: 1.7;
  white-space: nowrap;
}

.tag-pill--pink {
  background: var(--sakura-soft);
  color: var(--sakura-text);
}

.tag-pill--blue {
  background: var(--lake-soft);
  color: var(--lake-text);
}

.post-sub .sep {
  font-style: normal;
  color: var(--ink-faint);
  opacity: 0.6;
}

.post-date {
  font-size: var(--fs-date);
  color: var(--ink-faint);
  white-space: nowrap;
  font-variant-numeric: tabular-nums;
}

/* ── 文章详情 ─────────────────────────────── */

.article-shell {
  max-width: 980px;
  margin: 0 auto;
  padding: 56px 24px 80px;
  display: flex;
  gap: 56px;
  align-items: flex-start;
  position: relative;
}

.article-shell article {
  max-width: var(--max-w);
  width: 100%;
  position: relative;
  z-index: 6;
}

.article-header .badge {
  font-size: var(--fs-badge);
  font-weight: 600;
  font-style: italic;
  color: var(--sakura-text);
  margin-bottom: 18px;
  display: inline-block;
}

.article-header .badge.blue {
  color: var(--lake-text);
}

.article-header .badge.pink {
  color: var(--sakura-text);
}

.article-header h1 {
  font-family: "Fraunces", "Noto Serif SC", serif;
  font-size: var(--fs-h1);
  font-weight: 360;
  font-optical-sizing: auto;
  line-height: 1.14;
  letter-spacing: -0.015em;
  margin: 0 0 18px;
}

.article-meta {
  font-size: var(--fs-meta);
  color: var(--ink-faint);
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
  margin-bottom: 40px;
  font-style: italic;
}

.article-meta .sep {
  font-style: normal;
  opacity: 0.6;
}

.toc-inline {
  display: none;
  padding: 0 0 24px;
  margin-bottom: 32px;
  border-bottom: 1px solid var(--line);
}

.toc-inline summary {
  cursor: pointer;
  font-size: 14px;
  font-weight: 500;
  color: var(--ink-soft);
  list-style: none;
  display: flex;
  align-items: center;
  gap: 6px;
}

.toc-inline summary::-webkit-details-marker {
  display: none;
}

.toc-inline summary::after {
  content: "▾";
  font-size: 11px;
  transition: transform 0.2s ease;
}

.toc-inline[open] summary::after {
  transform: rotate(180deg);
}

.toc-inline ul {
  list-style: none;
  margin: 14px 0 0;
  padding: 0;
}

.toc-inline li {
  padding: 6px 0;
  font-size: 14px;
}

.toc-inline a:hover {
  color: var(--lake);
}

@media (max-width: 980px) {
  .toc-sidebar {
    display: none;
  }
  .toc-inline {
    display: block;
  }
}

.prose p {
  font-size: var(--fs-body);
  margin: 0 0 22px;
}

.prose h2 {
  font-family: "Fraunces", "Noto Serif SC", serif;
  font-size: var(--fs-h2);
  font-weight: 520;
  margin: 48px 0 18px;
  scroll-margin-top: 24px;
}

.prose h3 {
  font-family: "Fraunces", "Noto Serif SC", serif;
  font-size: var(--fs-h3);
  font-weight: 500;
  margin: 34px 0 14px;
  scroll-margin-top: 24px;
}

.prose img {
  max-width: 100%;
  height: auto;
  border-radius: 4px;
}

.prose ul,
.prose ol {
  font-size: var(--fs-body);
  padding-left: 22px;
  margin: 0 0 22px;
}

.prose li {
  margin-bottom: 8px;
}

.prose hr {
  border: none;
  border-top: 1px solid var(--line);
  margin: 40px 0;
}

.prose blockquote {
  margin: 0 0 22px;
  padding: 4px 20px;
  border-left: 2.5px solid var(--sakura);
  color: var(--ink-soft);
  font-size: 15px;
}

.prose pre {
  background: var(--code-bg);
  color: var(--code-ink);
  border-radius: 6px;
  padding: 20px 22px;
  overflow-x: auto;
  margin: 0 0 26px;
  font-family: "JetBrains Mono", monospace;
  font-size: 13.5px;
  line-height: 1.65;
  border: 1px solid var(--line);
}

.prose code {
  font-family: "JetBrains Mono", monospace;
}

.prose p code,
.prose li code {
  background: var(--lake-soft);
  color: var(--lake-text);
  padding: 2px 6px;
  border-radius: 4px;
  font-size: 0.88em;
}

/* highlight.js 插件输出的标准 class → 站点代码令牌 */
.hljs-comment,
.hljs-quote {
  color: var(--code-comment);
  font-style: italic;
}

.hljs-keyword,
.hljs-selector-tag,
.hljs-literal,
.hljs-doctag,
.hljs-name {
  color: var(--code-keyword);
}

.hljs-string,
.hljs-attr,
.hljs-regexp,
.hljs-addition,
.hljs-meta .hljs-string {
  color: var(--code-string);
}

.hljs-title,
.hljs-section,
.hljs-function .hljs-title,
.hljs-title.class_,
.hljs-type,
.hljs-built_in {
  color: var(--code-func);
}

.hljs-number,
.hljs-symbol,
.hljs-bullet,
.hljs-variable,
.hljs-template-variable {
  color: var(--code-ink);
}

.hljs-deletion {
  color: var(--code-comment);
}

.hljs-emphasis {
  font-style: italic;
}

.hljs-strong {
  font-weight: 600;
}

.toc-sidebar {
  position: sticky;
  top: 32px;
  width: 200px;
  flex-shrink: 0;
  font-size: 13.5px;
}

.toc-sidebar .toc-label {
  color: var(--ink-faint);
  margin-bottom: 12px;
  font-size: 12px;
  font-style: italic;
}

.toc-sidebar ul {
  list-style: none;
  margin: 0;
  padding: 0;
  border-left: 1px solid var(--line);
}

.toc-sidebar li a {
  display: block;
  padding: 6px 0 6px 14px;
  color: var(--ink-soft);
  border-left: 2px solid transparent;
  margin-left: -1px;
  transition:
    color 0.15s ease,
    border-color 0.15s ease;
}

.toc-sidebar li.sub a {
  padding-left: 26px;
  font-size: 13px;
}

.toc-sidebar li a:hover {
  color: var(--lake);
}

.toc-sidebar li a.active {
  color: var(--lake);
  border-left-color: var(--lake);
  font-weight: 500;
}

/* ── 归档：弧形年份轴 ─────────────────────── */

.arc {
  display: grid;
  /* 第一列宽度由 JS 按实际弧半径写入 --arc-col-w，
     保证放大后的年份数字不会压到右边的月份列 */
  grid-template-columns: var(--arc-col-w, 250px) 140px 1fr;
  gap: 32px;
}

.arc-axis {
  position: relative;
  touch-action: none;
  cursor: ns-resize;
  user-select: none;
  overscroll-behavior: contain;
}

.arc-axis:active {
  cursor: grabbing;
}

.arc-axis svg {
  position: absolute;
  left: 0;
  top: 0;
  overflow: visible;
  pointer-events: none;
}

.arc-year {
  position: absolute;
  left: 0;
  top: 0;
  background: none;
  border: none;
  cursor: pointer;
  font-family: "Fraunces", serif;
  color: var(--ink-faint);
  font-weight: 300;
  padding: 2px 6px;
  white-space: nowrap;
  /* 位置由 JS 每帧写 transform，只过渡颜色与字号，避免和拖动抢帧 */
  transition:
    color 0.25s,
    font-size 0.25s;
  will-change: transform;
}

.arc-year.active {
  color: var(--sakura);
  font-weight: 600;
}

.arc-hint {
  position: absolute;
  bottom: 0;
  left: 4px;
  font-size: 12px;
  color: var(--ink-faint);
}

/* 月份 / 文章列整体与弧线中心垂直对齐 */
.arc-col {
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.arc-months,
.arc-posts {
  display: flex;
  flex-direction: column;
}

.arc-months {
  gap: 4px;
}

.arc-posts {
  gap: 12px;
}

.arc-month {
  background: none;
  border: none;
  cursor: pointer;
  text-align: left;
  font-family: "Noto Serif SC", serif;
  font-size: 19px;
  color: var(--ink-soft);
  padding: 8px 10px;
  border-radius: 6px;
  transition:
    background 0.2s,
    color 0.2s;
  opacity: 0;
  transform: translateY(4px);
  animation: arc-rise 0.3s forwards;
}

.arc-month:hover {
  background: var(--lake-soft);
  color: var(--ink);
}

.arc-month.active {
  background: var(--lake-soft);
  color: var(--lake);
  font-weight: 600;
}

.arc-post {
  font-family: "Noto Serif SC", serif;
  font-size: 19px;
  color: var(--ink-soft);
  border-bottom: 1px solid transparent;
  width: fit-content;
  opacity: 0;
  transform: translateY(4px);
  animation: arc-rise 0.3s forwards;
}

.arc-post:hover {
  color: var(--ink);
  border-color: var(--sakura-soft);
}

@keyframes arc-rise {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ── 关于页 ───────────────────────────────── */

.about-head-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  flex-wrap: wrap;
}

.about-title-block h1 {
  font-family: "Fraunces", "Noto Serif SC", serif;
  font-size: var(--fs-page-title);
  font-weight: 380;
  line-height: 1.16;
  letter-spacing: -0.015em;
  margin: 0 0 6px;
}

.about-eyebrow {
  font-family: "Fraunces", serif;
  font-style: italic;
  font-size: 18px;
  color: var(--ink-faint);
  letter-spacing: 0.03em;
  margin: 0;
}

.about-identity {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-right: 52px;
}

.about-avatar-img,
.about-avatar-fallback {
  width: 64px;
  height: 64px;
  border-radius: 50%;
  flex: 0 0 auto;
  object-fit: cover;
}

.about-avatar-fallback {
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: "Noto Serif SC", serif;
  font-size: 23px;
  color: var(--bg-raised);
  background: linear-gradient(150deg, var(--lake) 0%, var(--sakura) 100%);
}

.about-id-text {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
}

.about-id-name {
  font-family: "Noto Serif SC", serif;
  font-size: 17px;
  font-weight: 500;
  color: var(--ink);
  line-height: 1.3;
}

.about-id-sub {
  font-family: "Fraunces", serif;
  font-style: italic;
  font-size: 12px;
  color: var(--ink-faint);
}

hr.about-divider {
  border: none;
  border-top: 1px solid var(--line);
  margin: 32px 0 40px;
}

.about-label {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 18px;
}

.about-label .dash {
  width: 28px;
  height: 1px;
  background: var(--sakura);
}

.about-label .text {
  font-family: "Noto Serif SC", serif;
  font-size: 19px;
  font-weight: 500;
  letter-spacing: 0.15em;
  color: var(--ink-soft);
}

.about-bio {
  font-size: 15px;
  color: var(--ink-soft);
  max-width: 62ch;
  margin: 0 0 32px;
  white-space: pre-line;
}

/* 联系方式：页面收尾的图标行 */
.about-contact-row {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 22px;
  margin-top: 64px;
  padding-top: 32px;
  border-top: 1px solid var(--line);
}

.contact-item {
  display: inline-flex;
  align-items: center;
  text-decoration: none;
  color: var(--ink-soft);
  position: relative;
  cursor: pointer;
}

.icon-wrap {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-raised);
  border: 1px solid var(--line);
  transition:
    transform 0.25s ease,
    box-shadow 0.25s ease,
    border-color 0.25s ease;
}

.contact-item:hover .icon-wrap {
  transform: translateY(-2px);
  box-shadow: 0 10px 20px -12px rgba(35, 35, 38, 0.3);
  border-color: var(--lake);
}

.icon-wrap svg {
  width: 18px;
  height: 18px;
}

/* 悬浮/点击信息卡片（邮箱 & 微信共用） */
.info-card {
  position: absolute;
  bottom: calc(100% + 12px);
  left: 50%;
  transform: translate(-50%, 6px);
  background: var(--bg-raised);
  border-radius: 14px;
  box-shadow: 0 20px 44px -22px rgba(35, 35, 38, 0.38);
  text-align: center;
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition:
    opacity 0.22s ease,
    transform 0.22s ease,
    visibility 0.22s;
  z-index: 10;
}

.info-card::after {
  content: "";
  position: absolute;
  top: 100%;
  left: 50%;
  transform: translateX(-50%);
  border: 7px solid transparent;
  border-top-color: var(--bg-raised);
}

.contact-item:hover .info-card,
.contact-item.is-active .info-card {
  opacity: 1;
  visibility: visible;
  transform: translate(-50%, 0);
  pointer-events: auto;
}

.email-card {
  width: 220px;
  padding: 16px 16px 14px;
}

.email-text {
  font-size: 13.5px;
  color: var(--ink);
  word-break: break-all;
  margin-bottom: 10px;
}

.copy-btn {
  font-family: "Noto Sans SC", sans-serif;
  font-size: 12px;
  color: var(--lake-text);
  background: var(--bg-raised);
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 5px 16px;
  cursor: pointer;
  transition:
    background 0.2s ease,
    color 0.2s ease,
    border-color 0.2s ease;
}

.copy-btn:hover {
  border-color: var(--lake-text);
}

.copy-btn.copied {
  background: var(--lake-text);
  border-color: var(--lake-text);
  color: var(--bg-raised);
}

.wechat-card {
  width: 168px;
  padding: 16px 16px 12px;
}

.qr-img {
  width: 120px;
  height: 120px;
  margin: 0 auto 8px;
  border-radius: 8px;
  border: 1px solid var(--line);
  display: block;
  object-fit: cover;
}

.qr-caption {
  font-size: 11px;
  color: var(--ink-faint);
  line-height: 1.5;
}

/* ── 搜索页 ───────────────────────────────── */

.search-form {
  display: flex;
  align-items: center;
  gap: 8px;
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 6px 8px 6px 18px;
  background: var(--bg-raised);
  margin-bottom: 8px;
}

.search-form input {
  flex: 1;
  min-width: 0;
  border: none;
  outline: none;
  background: transparent;
  font-family: inherit;
  font-size: 16px;
  color: var(--ink);
}

.search-form input::placeholder {
  color: var(--ink-faint);
}

.search-form button {
  flex-shrink: 0;
  border: 1px solid var(--line);
  background: var(--bg);
  color: var(--ink-soft);
  border-radius: 999px;
  padding: 6px 18px;
  font-family: inherit;
  font-size: 14px;
  cursor: pointer;
  transition:
    color 0.15s ease,
    border-color 0.15s ease;
}

.search-form button:hover {
  color: var(--lake);
  border-color: var(--lake);
}

.search-summary {
  font-size: var(--fs-meta);
  color: var(--ink-faint);
  font-style: italic;
  margin: 0 0 32px;
}

/* 搜索结果复用 post-card，只需撑开列表间距 */
.search-results {
  display: flex;
  flex-direction: column;
  gap: 36px;
}

.post-card mark {
  background: var(--sakura-soft);
  color: var(--sakura-text);
  font-weight: 500;
}

.empty-state {
  padding: 48px 0;
  text-align: center;
  color: var(--ink-faint);
}

.empty-state .empty-mark {
  display: block;
  font-family: "Fraunces", serif;
  font-size: 40px;
  color: var(--sakura);
  margin-bottom: 12px;
}

/* ── 404 ──────────────────────────────────── */

.error-page {
  text-align: center;
  padding: 96px 0 40px;
}

.error-page .error-code {
  font-family: "Fraunces", serif;
  font-size: 88px;
  font-weight: 340;
  line-height: 1;
  letter-spacing: -0.03em;
  color: var(--sakura);
  margin: 0 0 18px;
}

.error-page h1 {
  font-family: "Fraunces", "Noto Serif SC", serif;
  font-size: var(--fs-h2);
  font-weight: 400;
  margin: 0 0 12px;
}

.error-page p {
  color: var(--ink-soft);
  margin: 0 0 32px;
}

/* ── 无限滚动状态 ─────────────────────────── */

.infinite-status {
  max-width: var(--shell-w);
  margin: 0 auto;
  padding: 32px 24px 0;
  text-align: center;
  font-size: var(--fs-meta);
  color: var(--ink-faint);
  font-style: italic;
}

.infinite-status[data-state="loading"]::after {
  content: "";
  display: inline-block;
  width: 6px;
  height: 6px;
  margin-left: 8px;
  border-radius: 50%;
  background: var(--sakura);
  animation: statusPulse 1s ease-in-out infinite;
}

@keyframes statusPulse {
  0%,
  100% {
    opacity: 0.3;
  }
  50% {
    opacity: 1;
  }
}

/* ── Footer ───────────────────────────────── */

footer {
  max-width: var(--shell-w);
  margin: 56px auto 0;
  padding: 28px 24px 48px;
  border-top: 1px solid var(--line);
  font-size: var(--fs-footer);
  color: var(--ink-soft);
  display: flex;
  justify-content: space-between;
  position: relative;
  z-index: 2;
}

body.wide footer {
  max-width: 980px;
}

footer a:hover {
  color: var(--sakura);
}

.footer-links {
  display: flex;
  gap: 16px;
}

/* ── 响应式 ───────────────────────────────── */

@media (max-width: 760px) {
  .arc {
    grid-template-columns: var(--arc-col-w, 140px) 80px 1fr;
    gap: 8px;
  }
  /* 移动端内容列更窄，字号回到常规档 */
  .arc-month,
  .arc-post {
    font-size: 17px;
  }
}

@media (max-width: 640px) {
  header {
    padding: 24px 20px;
  }
  .page-shell {
    padding: 36px 20px 60px;
  }
  .hero {
    padding: 24px 20px 44px;
  }
  .section-label,
  .post-list,
  .infinite-status,
  footer {
    padding-left: 20px;
    padding-right: 20px;
  }
  .article-shell {
    padding: 40px 20px 60px;
    gap: 0;
  }
  .prose {
    --fs-h2: 21px;
  }
  .prose h2 {
    font-size: 21px;
  }
  .prose h3 {
    font-size: 17px;
  }
  .about-head-row {
    flex-direction: column;
    align-items: center;
    text-align: center;
    gap: 18px;
  }
  .about-title-block {
    text-align: center;
  }
  .about-identity {
    margin-right: 0;
  }
  .about-id-text {
    align-items: center;
  }
  .about-bio {
    max-width: none;
    text-align: center;
  }
  .about-label {
    justify-content: center;
  }
}

@media (max-width: 620px) {
  :root {
    --fs-hero-title: 40px;
    --fs-hero-body: 16px;
    --fs-post-title: 19px;
    --fs-h1: 30px;
    --fs-page-title: 28px;
    --fs-nav: 15px;
    --fs-year: 34px;
    --fs-body: 17px;
    --fs-welcome-title: 38px;
  }
  .post-excerpt {
    font-size: 15px;
  }
  .hero-branch {
    width: 130px;
    height: 130px;
    top: -8px;
    right: -6px;
  }
  .post-card,
  .post-card:nth-child(even) {
    grid-template-columns: 1fr;
    gap: 14px;
  }
  .post-card:nth-child(even) .post-thumb {
    order: 0;
  }
  .post-card:nth-child(even) .post-main {
    order: 1;
  }
  .post-thumb {
    aspect-ratio: 16 / 9;
  }
  .error-page .error-code {
    font-size: 64px;
  }
}