/* ============================================================
   秋雪的小窝 — 设计系统
   概念：雪夜暖屋。深色 = 夜雪初霁的墨青夜空；浅色 = 落雪的宣纸。
   主色：朱砂印泥红（印章、点睛）；墨色文字；暖纸背景。
   ============================================================ */

:root {
  /* 默认（暗色）令牌：即使 data-theme 缺失/异常也有完整配色 */
  --paper: #16181d;
  --paper-2: #1c1f26;
  --paper-3: #232733;
  --ink: #e6e3da;
  --ink-2: #a8a599;
  --ink-3: #94918a;
  --line: rgba(230, 227, 218, .1);
  --line-strong: rgba(230, 227, 218, .18);
  --seal: #c1440e;           /* 秋枫：填充面（白字 4.6:1） */
  --seal-ink: #e8703f;       /* 秋枫：暗底文字（5.8:1） */
  --seal-soft: rgba(193, 68, 14, .16);
  --snow: rgba(235, 240, 250, .85);
  --glow: rgba(193, 68, 14, .28);
  --code-bg: #12141a;
  --shadow-card: 0 1px 2px rgba(0,0,0,.4), 0 8px 24px rgba(0,0,0,.25);
  /* 背景照片强度：可在后台「设置 → 首页背景图强度」调整（默认平衡值） */
  --hero-img-opacity-dark: .62;
  --hero-img-opacity-light: .38;
  --hero-img-opacity: var(--hero-img-opacity-dark);
  --hero-scrim: linear-gradient(180deg,
      rgba(22,24,29,.80) 0%,
      rgba(22,24,29,.38) 30%,
      rgba(22,24,29,.56) 62%,
      rgba(22,24,29,.90) 100%);
  color-scheme: dark;

  /* 字体 */
  --font-body: 'LXGW WenKai', 'Noto Serif SC', 'Source Han Serif SC', serif;
  --font-mono: 'LXGW WenKai Mono', 'JetBrains Mono', Consolas, monospace;

  /* 动效 */
  --ease-out: cubic-bezier(.22, 1, .36, 1);
  --ease-spring: cubic-bezier(.34, 1.56, .64, 1);
  --t-fast: .18s;
  --t-mid: .32s;
  --t-slow: .6s;
}

/* ---------- 暗色（夜雪） ---------- */
html[data-theme="dark"] {
  --hero-grad: radial-gradient(1200px 500px at 70% -10%, rgba(120,140,190,.14), transparent 60%),
               radial-gradient(900px 420px at 15% 110%, rgba(192,57,43,.08), transparent 55%);
}

/* ---------- 浅色（宣纸） ---------- */
html[data-theme="light"] {
  --paper: #f7f4ec;          /* 宣纸暖白 */
  --paper-2: #fffdf6;        /* 卡片 */
  --paper-3: #efe9dc;        /* 压暗面 */
  --ink: #2b2926;            /* 浓墨 */
  --ink-2: #5f5a51;          /* 淡墨 */
  --ink-3: #6a655b;          /* 飞白（三档底色均 ≥4.5:1） */
  --line: rgba(43, 41, 38, .1);
  --line-strong: rgba(43, 41, 38, .2);
  --seal: #b0451a;           /* 秋枫：填充面 */
  --seal-ink: #b0451a;       /* 秋枫：浅底文字（5.0:1） */
  --seal-soft: rgba(176, 69, 26, .1);
  --snow: rgba(255, 255, 255, .9);
  --glow: rgba(176, 69, 26, .2);
  --code-bg: #f1ede2;
  --shadow-card: 0 1px 2px rgba(60,50,30,.06), 0 10px 30px rgba(60,50,30,.08);
  --hero-grad: radial-gradient(1200px 500px at 70% -10%, rgba(150,170,215,.16), transparent 60%),
               radial-gradient(900px 420px at 15% 110%, rgba(176,58,46,.06), transparent 55%);
  --hero-img-opacity: var(--hero-img-opacity-light);
  --hero-scrim: linear-gradient(180deg,
      rgba(247,244,236,.66) 0%,
      rgba(247,244,236,.24) 32%,
      rgba(247,244,236,.42) 64%,
      rgba(247,244,236,.92) 100%);
  color-scheme: light;
}

/* ============ 基础 ============ */
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
html:focus-within { scroll-behavior: smooth; }

body.overlay-open { overflow: hidden; }

body {
  margin: 0;
  font-family: var(--font-body);
  background: var(--paper);
  color: var(--ink);
  line-height: 1.75;
  font-size: 16.5px;
  -webkit-font-smoothing: antialiased;
  transition: background var(--t-slow) var(--ease-out), color var(--t-mid) var(--ease-out);
  overflow-x: hidden;
}

::selection { background: var(--seal); color: #fff; }

a { color: inherit; text-decoration: none; }
a:hover { color: var(--seal-ink); }

button { font-family: inherit; cursor: pointer; }
.btn:disabled, button:disabled, [aria-disabled="true"] { opacity: .45; cursor: not-allowed; }
.btn.primary:disabled { background: var(--paper-3); color: var(--ink-3); border-color: var(--line); box-shadow: none; }
input:disabled, textarea:disabled, select:disabled { opacity: .6; cursor: not-allowed; }

:focus-visible {
  outline: 2px solid var(--seal);
  outline-offset: 3px;
  border-radius: 4px;
}
/* SPA 切路由会对整块 <main> 程序化 focus，全局描边会在页脚上方画出一条贯穿全宽的“幽灵线”；
   改用不溢出容器的内阴影指示，键盘用户依旧能看到焦点落在新视图上 */
#app:focus-visible { outline: none; box-shadow: inset 0 3px 0 var(--seal); }

.ic { width: 20px; height: 20px; flex: none; }
::placeholder { color: var(--ink-2); opacity: 1; }

/* ============ 阅读进度条 ============ */
#progress {
  position: fixed; top: 0; left: 0; height: 2px; width: 100%;
  background: linear-gradient(90deg, var(--seal), var(--seal-ink));
  z-index: 300;
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform .12s linear;
}

/* ============ 顶部导航 ============ */
#nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 200;
  display: flex; align-items: center; justify-content: space-between;
  padding: 0 clamp(16px, 4vw, 40px);
  height: 64px;
  transition: background var(--t-mid) var(--ease-out), box-shadow var(--t-mid), border-color var(--t-mid);
  border-bottom: 1px solid transparent;
}
#nav.scrolled {
  background: color-mix(in srgb, var(--paper) 86%, transparent);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom-color: var(--line);
}
.nav-brand { display: flex; align-items: center; gap: 10px; }
.nav-brand:hover { color: inherit; }
.nav-avatar {
  width: 36px; height: 36px; border-radius: 50%; flex: none;
  object-fit: cover; border: 1px solid var(--line-strong);
  transition: transform var(--t-mid) var(--ease-spring), border-color var(--t-fast);
}
.nav-brand:hover .nav-avatar { transform: rotate(-8deg) scale(1.06); border-color: var(--seal); }
.nav-title { font-weight: 700; font-size: 17px; letter-spacing: .5px; }
/* 旧印章样式保留给管理后台等场景 */
.seal { width: 36px; height: 36px; flex: none; }

.nav-links { display: flex; align-items: center; gap: 4px; }
.nav-actions { display: flex; align-items: center; gap: 4px; margin-left: 6px; }
.nav-links a, .nav-links button {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 7px 12px;
  border-radius: 10px;
  font-size: 15px;
  color: var(--ink-2);
  background: none; border: none;
  transition: color var(--t-fast), background var(--t-fast);
}
.nav-links a:hover, .nav-links button:hover { color: var(--ink); background: var(--seal-soft); }
.nav-links a.active { color: var(--seal-ink); font-weight: 700; }

.icon-btn {
  display: inline-flex; align-items: center; justify-content: center;
  position: relative;
  width: 36px; height: 36px; border-radius: 10px;
  background: none; border: none; color: var(--ink-2);
  transition: color var(--t-fast), background var(--t-fast), transform var(--t-fast) var(--ease-spring);
}
/* 视觉尺寸不变，用伪元素把触控命中区扩到 44px */
.icon-btn::after { content: ''; position: absolute; inset: -4px; }
.icon-btn:hover { color: var(--ink); background: var(--seal-soft); }
.icon-btn:active { transform: scale(.92); }

.nav-admin {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 7px 14px !important;
  border: 1px solid var(--line-strong) !important;
  border-radius: 999px !important;
  font-size: 14px !important;
  color: var(--ink) !important;
  transition: border-color var(--t-fast), background var(--t-fast), color var(--t-fast);
}
.nav-admin:hover { border-color: var(--seal) !important; background: var(--seal-soft) !important; color: var(--seal-ink) !important; }

#menuBtn { display: none; }

/* 主题按钮：按偏好显示 跟随系统 / 太阳 / 月亮 */
#themeBtn .ic { display: none; transition: transform var(--t-mid) var(--ease-spring); }
html:not([data-theme-pref]) #themeBtn .ic-auto,
html[data-theme-pref="auto"] #themeBtn .ic-auto,
html[data-theme-pref="light"] #themeBtn .ic-sun,
html[data-theme-pref="dark"] #themeBtn .ic-moon { display: block; }
#themeBtn:hover .ic { transform: rotate(24deg); }

/* ============ 移动端抽屉 ============ */
#drawerMask {
  position: fixed; inset: 0; z-index: 240;
  background: rgba(0,0,0,.45);
  opacity: 0; transition: opacity var(--t-mid);
}
#drawerMask.show { opacity: 1; }
#drawer {
  position: fixed; top: 0; right: 0; bottom: 0; z-index: 250;
  width: min(300px, 82vw);
  background: var(--paper-2);
  border-left: 1px solid var(--line);
  display: flex; flex-direction: column; gap: 4px;
  padding: 84px 18px 24px;
  transform: translateX(100%);
  visibility: hidden;
  transition: transform var(--t-mid) var(--ease-out), visibility 0s linear var(--t-mid);
}
#drawer.open { transform: translateX(0); visibility: visible; transition: transform var(--t-mid) var(--ease-out), visibility 0s; }
#drawer a, #drawer > button {
  padding: 13px 16px; border-radius: 12px; font-size: 16px;
  color: var(--ink-2); background: none; border: none; text-align: left;
  transition: background var(--t-fast), color var(--t-fast);
}
#drawer a:hover, #drawer > button:hover { background: var(--seal-soft); color: var(--seal-ink); }
/* 与顶栏汉堡按钮同位，展开后原地即可收回 */
.drawer-close {
  position: absolute; top: 10px; right: clamp(16px, 4vw, 40px);
  width: 36px; height: 36px; color: var(--ink-2);
}
.drawer-close:hover { background: var(--seal-soft); color: var(--seal-ink); }
.drawer-theme {
  display: flex; gap: 6px; margin-top: auto; padding-top: 16px;
  border-top: 1px solid var(--line);
}
.drawer-theme button {
  flex: 1; padding: 9px 4px; min-height: 44px; border-radius: 10px; font-family: inherit; font-size: 13px;
  border: 1px solid var(--line); background: var(--paper); color: var(--ink-2);
  transition: all var(--t-fast);
}
.drawer-theme button:hover { color: var(--ink); border-color: var(--line-strong); }
html:not([data-theme-pref]) .drawer-theme [data-theme-mode="auto"],
html[data-theme-pref="auto"] .drawer-theme [data-theme-mode="auto"],
html[data-theme-pref="light"] .drawer-theme [data-theme-mode="light"],
html[data-theme-pref="dark"] .drawer-theme [data-theme-mode="dark"] {
  border-color: var(--seal); color: var(--seal-ink); background: var(--seal-soft); font-weight: 700;
}

/* ============ 布局容器 ============ */
main { min-height: 70vh; }
.container { max-width: 860px; margin: 0 auto; padding: 0 clamp(16px, 4vw, 32px); }
.container-wide { max-width: 1080px; margin: 0 auto; padding: 0 clamp(16px, 4vw, 32px); }
/* 正文层压在雪花之上（雪花只在页面空隙可见） */
.container, .container-wide, #footer { position: relative; z-index: 2; }

/* ============ 首页双栏（左文章 · 右动态） ============ */
.home-cols {
  display: grid;
  grid-template-columns: minmax(0, 1.9fr) minmax(280px, 1fr);
  gap: clamp(20px, 3.6vw, 88px);
  align-items: start;
  padding-top: clamp(36px, 5vh, 64px);
  padding-bottom: 10px;
  /* 宽屏铺开：跟随视口放大，避免两栏挤在中间 */
  max-width: min(1560px, 94vw);
}
.panel {
  background: var(--paper-2);
  border: 1px solid var(--line);
  border-radius: 20px;
  padding: 20px 26px 8px;
  box-shadow: var(--shadow-card);
}
.panel-head {
  display: flex; align-items: center; gap: 12px;
  padding-bottom: 9px; margin-bottom: 0;
  border-bottom: 1px solid var(--line);
}
.panel-head h2 {
  margin: 0; font-size: 19px; font-weight: 700; letter-spacing: .05em;
  display: flex; align-items: center; gap: 10px;
}
.panel-head h2::before {
  content: ''; width: 9px; height: 9px; border-radius: 2px;
  background: var(--seal); transform: rotate(45deg); flex: none;
}
.panel-head .more {
  margin: -10px -10px -10px auto; font-size: 13.5px; color: var(--ink-3);
  background: none; border: none; font-family: inherit; padding: 10px;
  transition: color var(--t-fast);
}
.panel-head .more:hover { color: var(--seal-ink); }
.panel .count { font-size: 12.5px; color: var(--ink-3); font-weight: 400; }

/* 面板内条目：去掉卡片外衣，改为分隔线列表 */
.panel .article-card,
.panel .moment-card {
  background: none; border: none; box-shadow: none; border-radius: 0;
  padding: 13px 2px; margin: 0;
  border-bottom: 1px dashed var(--line);
}
.panel .article-card:first-child,
.panel .moment-card:first-child { padding-top: 10px; }
.panel .article-card:last-child, .panel .moment-card:last-child { border-bottom: none; }
.panel .article-card:hover, .panel .moment-card:hover { transform: none; }
.panel .article-card::after { display: none; }
.panel .article-card h3 { font-size: 17.5px; margin-bottom: 6px; }
.panel .article-card .excerpt { font-size: 14px; margin-bottom: 10px; }
.panel .article-card .cover { display: none; }
.panel .moment-card { padding: 14px 2px; }
.panel .moment-avatar { width: 30px; height: 30px; }
.panel .moment-content { font-size: 14.5px; }
.panel .moment-who { font-size: 14px; }
.panel .moment-time { font-size: 12px; }
.panel .empty { padding: 40px 0; }

/* 大屏逐级放大字号与留白，让版面舒展 */
@media (min-width: 1440px) {
  .panel { padding: 24px 32px 10px; border-radius: 22px; }
  .panel-head h2 { font-size: 20px; }
  .panel .article-card h3 { font-size: 18.5px; }
  .panel .article-card .excerpt { font-size: 14.5px; }
  .panel .moment-content { font-size: 15px; }
}
@media (min-width: 1800px) {
  .home-cols { max-width: min(1860px, 95vw); }
  .panel .article-card h3 { font-size: 19.5px; }
  .panel .article-card .excerpt { font-size: 15px; }
  .panel .moment-content { font-size: 15.5px; }
}
@media (max-width: 980px) {
  .home-cols { grid-template-columns: 1fr; gap: 22px; padding-top: 40px; }
}

/* ============ 首页 Hero ============ */
.hero {
  position: relative;
  min-height: calc(100vh - 64px);
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  text-align: center;
  padding: 100px 20px 60px;
  background: var(--hero-grad);
  overflow: hidden;
  isolation: isolate;
  z-index: 2;               /* 压在雪花 canvas(1) 之上，雪花从照片/遮罩后透出 */
}
/* 背景照片：轻微模糊 + 主题色渐变遮罩，文字始终清晰 */
.hero::before {
  content: '';
  position: absolute; inset: -30px;
  background-image: url('/assets/img/hero.webp');
  background-size: cover;
  background-position: center 30%;
  filter: blur(1.6px) saturate(1.06);
  opacity: var(--hero-img-opacity, .3);
  transform: scale(1.04);
  z-index: 0;
}
.hero::after {
  content: '';
  position: absolute; inset: 0;
  background: var(--hero-scrim);
  z-index: 1;
}
.hero > * { position: relative; z-index: 2; }
@media (max-width: 760px) {
  .hero::before { background-image: url('/assets/img/hero-sm.webp'); filter: blur(1.2px) saturate(1.06); }
}
/* 公告胶囊 */
.announce {
  display: inline-block;
  margin-bottom: 20px; padding: 8px 22px;
  background: var(--seal-soft);
  color: var(--seal-ink);
  border: 1px solid var(--glow);
  border-radius: 999px;
  font-size: 13.5px; line-height: 1.6; max-width: min(90vw, 640px);
}
.hero-name {
  font-size: clamp(56px, min(12vw, 15vh), 11rem);
  font-weight: 700;
  line-height: 1.12;
  margin: 0;
  letter-spacing: .04em;
  background: linear-gradient(160deg, var(--ink) 30%, var(--ink-2));
  -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent;
}
@media (forced-colors: active) {
  .hero-name { -webkit-text-fill-color: currentColor; background: none; }
}
.hero-name .en {
  display: block;
  font-size: clamp(20px, 3.4vw, 34px);
  font-weight: 400;
  letter-spacing: .42em;
  margin-top: 14px;
  color: var(--ink-3);
  -webkit-text-fill-color: var(--ink-3);
  text-indent: .42em;
}
.hero-sig {
  margin: 26px auto 0;
  max-width: 34em;
  font-size: clamp(15px, 2vw, 18px);
  color: var(--ink-2);
}
.hero-sig::before { content: '「'; color: var(--seal-ink); }
.hero-sig::after { content: '」'; color: var(--seal-ink); }

.hero-meta {
  display: flex; gap: 22px; justify-content: center; flex-wrap: wrap;
  margin-top: 34px; font-size: 14px; color: var(--ink-3);
}
.hero-meta b { color: var(--ink-2); font-size: 16px; }

.hero-scroll {
  position: absolute; bottom: 26px; left: 50%;
  transform: translateX(-50%);
  display: flex; flex-direction: column; align-items: center; gap: 6px;
  color: var(--ink-3); font-size: 12px; letter-spacing: .3em; text-indent: .3em;
  background: none; border: none;
  animation: bob 2.6s ease-in-out infinite;
}
.hero-scroll svg { width: 18px; height: 18px; }
@keyframes bob { 0%,100% { transform: translate(-50%, 0); } 50% { transform: translate(-50%, 8px); } }

/* Hero 入场编排 */
.hero .rise { opacity: 0; transform: translateY(26px); animation: rise .9s var(--ease-out) forwards; }
.hero .rise:nth-child(2) { animation-delay: .12s; }
.hero .rise:nth-child(3) { animation-delay: .26s; }
.hero .rise:nth-child(4) { animation-delay: .4s; }
@keyframes rise { to { opacity: 1; transform: none; } }

/* ============ 雪花画布 ============ */
#snowCanvas {
  position: fixed; inset: 0; z-index: 1;
  pointer-events: none;
  transition: opacity 1.2s;
}
html[data-theme="light"] #snowCanvas { opacity: .55; }

/* ============ 区块标题 ============ */
.section { padding: 56px 0 8px; scroll-margin-top: 80px; }
.section-head {
  display: flex; align-items: baseline; gap: 14px;
  margin-bottom: 26px;
}
.section-head h2 {
  margin: 0; font-size: 26px; font-weight: 700; letter-spacing: .06em;
  display: flex; align-items: center; gap: 12px;
}
.section-head h2::before {
  content: ''; width: 10px; height: 10px; border-radius: 2px;
  background: var(--seal); transform: rotate(45deg); flex: none;
}
.section-head .more { margin-left: auto; font-size: 14px; color: var(--ink-3); }
.section-head .more:hover { color: var(--seal-ink); }

/* ============ 动态卡片流 ============ */
.moments-list { display: flex; flex-direction: column; gap: 14px; }
.moment-card {
  background: var(--paper-2);
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 18px 22px;
  box-shadow: var(--shadow-card);
  transition: transform var(--t-mid) var(--ease-out), border-color var(--t-mid);
}
.moment-card:hover { transform: translateY(-3px); border-color: var(--line-strong); }
.moment-head { display: flex; align-items: center; gap: 10px; margin-bottom: 8px; }
.moment-avatar {
  width: 34px; height: 34px; border-radius: 50%; flex: none;
  object-fit: cover; background: var(--paper-3);
  border: 1px solid var(--line-strong);
}
.moment-who { font-weight: 700; font-size: 15px; }
.moment-time { margin-left: auto; font-size: 12.5px; color: var(--ink-3); }
.moment-content { font-size: 15.5px; white-space: pre-wrap; word-break: break-word; }
.moment-content a { color: var(--seal-ink); border-bottom: 1px dashed var(--seal); }
.moment-imgs { display: grid; gap: 8px; margin-top: 12px; grid-template-columns: repeat(auto-fill, minmax(120px, 1fr)); }
.moment-imgs img {
  width: 100%; aspect-ratio: 1; object-fit: cover; border-radius: 10px; cursor: zoom-in;
  border: 1px solid var(--line);
  transition: transform var(--t-mid) var(--ease-out);
}
.moment-imgs img:hover { transform: scale(1.03); }

/* ============ 文章卡片 ============ */
.article-list { display: flex; flex-direction: column; gap: 18px; }
.article-card {
  display: block;
  background: var(--paper-2);
  border: 1px solid var(--line);
  border-radius: 18px;
  padding: 24px 28px;
  box-shadow: var(--shadow-card);
  transition: transform var(--t-mid) var(--ease-out), border-color var(--t-mid), box-shadow var(--t-mid);
  position: relative;
  overflow: hidden;
}
.article-card::after {
  content: ''; position: absolute; left: 0; top: 0; bottom: 0; width: 3px;
  background: var(--seal); opacity: 0;
  transition: opacity var(--t-mid);
}
.article-card:hover { transform: translateY(-4px); border-color: var(--line-strong); }
.article-card:hover::after { opacity: 1; }
.article-card .pin-flag {
  display: inline-flex; align-items: center; gap: 5px;
  font-size: 12px; color: var(--seal-ink);
  background: var(--seal-soft); border-radius: 999px;
  padding: 2px 10px; margin-bottom: 10px;
}
.article-card h3 { margin: 0 0 8px; font-size: 20px; line-height: 1.4; }
/* 超长英文串/URL 必须能断，否则卡片标题会被 overflow:hidden 无省略号硬截断 */
.article-card h3, .post-head h1, .related-name { overflow-wrap: anywhere; word-break: break-word; min-width: 0; }
.article-card:hover h3 { color: var(--seal-ink); }
.article-card .excerpt { margin: 0 0 14px; color: var(--ink-2); font-size: 15px; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.article-meta { display: flex; flex-wrap: wrap; gap: 8px 16px; align-items: center; font-size: 13px; color: var(--ink-3); }
.article-meta .tag {
  color: var(--ink-2); background: var(--paper-3);
  padding: 2px 10px; border-radius: 999px; font-size: 12.5px;
  transition: background var(--t-fast), color var(--t-fast);
}
.article-meta .tag:hover { background: var(--seal-soft); color: var(--seal-ink); }
.article-meta .views { margin-left: auto; }

/* 封面缩略图 */
.article-card.has-cover { display: grid; grid-template-columns: minmax(0, 1fr) 140px; gap: 20px; align-items: start; }
.article-card.has-cover .card-body { grid-column: 1; grid-row: 1; min-width: 0; }
.article-card.has-cover .cover {
  grid-column: 2; grid-row: 1;
  width: 140px; height: 96px; object-fit: cover;
  border-radius: 12px; border: 1px solid var(--line);
  transition: transform var(--t-mid) var(--ease-out);
}
.article-card.has-cover:hover .cover { transform: scale(1.04); }
@media (max-width: 560px) {
  .article-card.has-cover { grid-template-columns: 1fr; }
  .article-card.has-cover .card-body { grid-column: 1; grid-row: 2; }
  .article-card.has-cover .cover { grid-column: 1; grid-row: 1; width: 100%; height: 150px; }
}
/* 面板内是分隔线列表，封面隐藏后必须复位网格，否则残留 140px 空列 */
.panel .article-card.has-cover { display: block; }

/* 文章页封面与分享 */
.post-cover { width: 100%; border-radius: 16px; margin: 22px 0 6px; border: 1px solid var(--line); }
.post-actions { display: flex; justify-content: center; gap: 10px; margin-top: 18px; flex-wrap: wrap; }
.post-actions button {
  display: inline-flex; align-items: center; gap: 6px;
  font-family: inherit; font-size: 13.5px; color: var(--ink-2);
  background: var(--paper-2); border: 1px solid var(--line); border-radius: 999px;
  padding: 7px 16px; transition: all var(--t-fast);
}
.post-actions button:hover { color: var(--seal-ink); border-color: var(--seal); }
.post-actions .ic { width: 16px; height: 16px; }

/* ============ 文章页 ============ */
.post-wrap { padding-top: 110px; }
.post-head { text-align: center; margin-bottom: 12px; }
.post-head h1 { font-size: clamp(26px, 4.6vw, 38px); line-height: 1.35; margin: 10px 0 16px; }
.post-meta { display: flex; justify-content: center; flex-wrap: wrap; gap: 6px 18px; font-size: 13.5px; color: var(--ink-3); }
.post-meta .tag { color: var(--ink-2); background: var(--paper-3); padding: 2px 10px; border-radius: 999px; }
.post-divider { border: none; height: 1px; background: linear-gradient(90deg, transparent, var(--line-strong), transparent); margin: 30px 0; }

/* 正文排版 */
.prose { font-size: 16.5px; line-height: 1.9; word-break: break-word; max-width: 40em; margin-inline: auto; }
.prose > *:first-child { margin-top: 0; }
.prose h1, .prose h2, .prose h3, .prose h4 {
  font-weight: 700; line-height: 1.4; margin: 1.6em 0 .7em;
  scroll-margin-top: 90px;
}
.prose h2 { font-size: 22px; border-left: 4px solid var(--seal); padding-left: 12px; }
.prose h3 { font-size: 19px; }
.prose h4 { font-size: 17px; }
.prose p { margin: .9em 0; }
.prose a {
  color: var(--seal-ink);
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: .22em;
}
.prose a:hover { text-decoration-color: var(--seal); }
.prose img { max-width: 100%; border-radius: 12px; display: block; margin: 1.2em auto; cursor: zoom-in; box-shadow: var(--shadow-card); }
.prose blockquote {
  margin: 1.2em 0; padding: 10px 18px;
  border-left: 3px solid var(--seal);
  background: var(--seal-soft); border-radius: 0 12px 12px 0;
  color: var(--ink-2);
}
.prose blockquote p { margin: .4em 0; }
.prose ul, .prose ol { padding-left: 1.6em; }
.prose li { margin: .3em 0; }
.prose li::marker { color: var(--seal-ink); }
.prose hr { border: none; height: 1px; background: var(--line-strong); margin: 2em auto; width: 60%; }
/* 表格：外层做横向滚动，table 保持 display:table —— display:block 会让 width:100% 失效，
   还会让部分屏幕阅读器丢失表格语义 */
.table-wrap { overflow-x: auto; margin: 1.2em 0; }
.prose .table-wrap table { margin: 0; }
.prose table { border-collapse: collapse; width: 100%; margin: 1.2em 0; font-size: 15px; }
.prose th, .prose td { border: 1px solid var(--line-strong); padding: 8px 14px; text-align: left; }
.prose th { background: var(--paper-3); font-weight: 700; }
.prose .footnotes { font-size: 14px; color: var(--ink-2); border-top: 1px dashed var(--line-strong); margin-top: 2em; padding-top: .6em; }
.prose .footnotes .footnote-backref { text-decoration: none; }

/* 任务列表 */
.prose .task-list-item { list-style: none; }
.prose .task-list-item input[type="checkbox"] { accent-color: var(--seal); margin-right: 6px; }

/* 行内代码 */
.prose code:not(pre code) {
  font-family: var(--font-mono); font-size: .88em;
  background: var(--seal-soft); color: var(--seal-ink);
  padding: 2px 7px; border-radius: 6px;
  word-break: break-all;
}

/* 代码块 */
.prose .code-block { position: relative; margin: 1.3em 0; }
.prose pre {
  margin: 0; padding: 18px 20px;
  background: var(--code-bg); border: 1px solid var(--line);
  border-radius: 14px; overflow-x: auto;
  font-family: var(--font-mono); font-size: 14px; line-height: 1.7;
}
.prose pre code { font-family: inherit; background: none; padding: 0; }
/* 角标共用一个 flex 容器：各自绝对定位时，复制按钮的固定偏移会随语言名长度挤压甚至相撞 */
.code-tools {
  position: absolute; top: 8px; right: 12px;
  display: flex; align-items: center; gap: 6px;
}
.code-lang {
  font-family: var(--font-mono); font-size: 12px; letter-spacing: .08em;
  color: var(--ink-3); opacity: .95;
  background: var(--code-bg, transparent); padding: 2px 8px; border-radius: 6px;
}
.code-copy {
  display: inline-flex; align-items: center; gap: 4px;
  font-size: 12px; color: var(--ink-3);
  background: var(--code-bg, transparent); border: none; padding: 2px 8px; border-radius: 6px;
  opacity: 0; transition: opacity var(--t-fast), color var(--t-fast), background var(--t-fast);
}
.code-block:hover .code-copy,
.code-block:focus-within .code-copy { opacity: 1; }
@media (hover: none) { .code-copy { opacity: 1; } }
.code-copy:hover { color: var(--ink); background: var(--seal-soft); }
.code-copy.ok { color: var(--seal-ink); }

/* ---- 代码高亮主题（暖纸·朱砂，暗色=夜窗/浅色=宣纸） ---- */
/* 暗色：夜窗里看代码 */
html[data-theme="dark"] .hljs-comment,
html[data-theme="dark"] .hljs-quote { color: #848c9b; font-style: italic; }
html[data-theme="dark"] .hljs-keyword,
html[data-theme="dark"] .hljs-selector-tag,
html[data-theme="dark"] .hljs-literal,
html[data-theme="dark"] .hljs-type { color: #e8a87c; }          /* 暖橘 */
html[data-theme="dark"] .hljs-string,
html[data-theme="dark"] .hljs-regexp,
html[data-theme="dark"] .hljs-addition { color: #a3c989; }     /* 雪松绿 */
html[data-theme="dark"] .hljs-number,
html[data-theme="dark"] .hljs-symbol,
html[data-theme="dark"] .hljs-bullet { color: #d4a2d4; }       /* 淡藤（少量点缀） */
html[data-theme="dark"] .hljs-title,
html[data-theme="dark"] .hljs-section,
html[data-theme="dark"] .hljs-name,
html[data-theme="dark"] .hljs-selector-id,
html[data-theme="dark"] .hljs-selector-class { color: #7db3d9; } /* 雪青 */
html[data-theme="dark"] .hljs-attr,
html[data-theme="dark"] .hljs-attribute,
html[data-theme="dark"] .hljs-variable,
html[data-theme="dark"] .hljs-template-variable { color: #d9c58a; } /* 灯黄 */
html[data-theme="dark"] .hljs-built_in,
html[data-theme="dark"] .hljs-builtin-name { color: #e8a87c; }
html[data-theme="dark"] .hljs-meta { color: #8a94a6; }
html[data-theme="dark"] .hljs-deletion { color: #e8703f; }
html[data-theme="dark"] .hljs-emphasis { font-style: italic; }
html[data-theme="dark"] .hljs-strong { font-weight: 700; }

/* 浅色：宣纸上写代码 */
html[data-theme="light"] .hljs-comment,
html[data-theme="light"] .hljs-quote { color: #6f6a5e; font-style: italic; }
html[data-theme="light"] .hljs-keyword,
html[data-theme="light"] .hljs-selector-tag,
html[data-theme="light"] .hljs-literal,
html[data-theme="light"] .hljs-type { color: #a34d22; }         /* 朱砂橘（4.9:1） */
html[data-theme="light"] .hljs-string,
html[data-theme="light"] .hljs-regexp,
html[data-theme="light"] .hljs-addition { color: #457439; }    /* 松绿（4.7:1） */
html[data-theme="light"] .hljs-number,
html[data-theme="light"] .hljs-symbol,
html[data-theme="light"] .hljs-bullet { color: #8a4f8a; }      /* 藕紫（少量） */
html[data-theme="light"] .hljs-title,
html[data-theme="light"] .hljs-section,
html[data-theme="light"] .hljs-name,
html[data-theme="light"] .hljs-selector-id,
html[data-theme="light"] .hljs-selector-class { color: #2d6a8f; } /* 黛青 */
html[data-theme="light"] .hljs-attr,
html[data-theme="light"] .hljs-attribute,
html[data-theme="light"] .hljs-variable,
html[data-theme="light"] .hljs-template-variable { color: #7d621c; } /* 赭黄（4.9:1） */
html[data-theme="light"] .hljs-built_in,
html[data-theme="light"] .hljs-builtin-name { color: #b05a2e; }
html[data-theme="light"] .hljs-meta { color: #6f6a60; }
html[data-theme="light"] .hljs-deletion { color: #b0451a; }
html[data-theme="light"] .hljs-emphasis { font-style: italic; }
html[data-theme="light"] .hljs-strong { font-weight: 700; }

/* KaTeX 微调 */
.prose .katex-display { overflow-x: auto; overflow-y: hidden; padding: 4px 0; }
.katex { font-size: 1.06em; }

/* 上下篇 */
.post-nav { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; margin: 44px 0 10px; }.post-nav a {
  background: var(--paper-2); border: 1px solid var(--line); border-radius: 14px;
  padding: 14px 18px; font-size: 14.5px; color: var(--ink-2);
  transition: border-color var(--t-fast), color var(--t-fast), transform var(--t-fast) var(--ease-out);
  overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
}
.post-nav a:hover { border-color: var(--seal); color: var(--seal-ink); transform: translateY(-2px); }
.post-nav a.next { text-align: right; }
.post-nav small { display: block; color: var(--ink-3); font-size: 12px; margin-bottom: 3px; }

/* ============ 目录 TOC ============ */
/* 侧栏目录：仅当视口容得下「正文 860 + 目录 200 + 间距」时才显示（≥1340px） */
#tocBar {
  position: fixed; top: 100px; left: calc(50% + 450px); width: 200px;
  scrollbar-gutter: stable;
  max-height: calc(100vh - 160px); overflow-y: auto;
  font-size: 13px; color: var(--ink-3);
  display: none; z-index: 90;
}
#tocBar.show { display: block; }
#tocBar .toc-title { margin: 0 0 10px; font-size: 13px; letter-spacing: .2em; color: var(--ink-3); }
#tocBar ol { list-style: none; margin: 0; padding: 0; }
#tocBar li { margin: 0; }
#tocBar a { display: block; padding: 4px 0 4px 14px; border-left: 2px solid var(--line); color: var(--ink-3); line-height: 1.5; transition: color var(--t-fast), border-color var(--t-fast); }
#tocBar a.l2 { padding-left: 26px; }
#tocBar a.l3 { padding-left: 38px; }
#tocBar a:hover { color: var(--ink); }
#tocBar a.current { color: var(--seal-ink); border-left-color: var(--seal); }

/* 内联目录：窄屏时替代侧栏 */
.toc-inline {
  display: none;
  margin: 22px 0 4px;
  background: var(--paper-2); border: 1px solid var(--line); border-radius: 14px;
  padding: 12px 18px;
}
.toc-inline summary {
  cursor: pointer; font-size: 14.5px; font-weight: 700; color: var(--ink-2);
  list-style: none; padding: 12px 0;
}
.toc-inline summary::-webkit-details-marker { display: none; }
.toc-inline summary::before { content: '▸ '; color: var(--seal-ink); }
.toc-inline[open] summary::before { content: '▾ '; }
.toc-inline ol { list-style: none; margin: 12px 0 4px; padding: 0; font-size: 14px; }
.toc-inline li { margin: 0; }
.toc-inline a { display: block; padding: 5px 0; color: var(--ink-2); }
.toc-inline a.l3 { padding-left: 20px; font-size: 13.5px; }
.toc-inline a:hover { color: var(--seal-ink); }
@media (max-width: 1340px) {
  #tocBar { display: none !important; }
  .toc-inline { display: block; }
}

/* ============ 归档页 ============ */
.archive-year { margin: 34px 0 10px; font-size: 24px; font-weight: 700; }
.archive-year b { color: var(--seal-ink); font-size: 15px; margin-left: 8px; font-weight: 400; }
.archive-item {
  display: flex; align-items: baseline; gap: 16px;
  padding: 9px 6px; border-bottom: 1px dashed var(--line);
  transition: background var(--t-fast);
}
.archive-item:hover { background: var(--seal-soft); }
.archive-item time { font-size: 13px; color: var(--ink-3); flex: none; font-family: var(--font-mono); }
.archive-item a { font-size: 15.5px; flex: 1; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.archive-item a:hover { color: var(--seal-ink); }

/* ============ 标签页 ============ */
.tag-cloud { display: flex; flex-wrap: wrap; gap: 12px; padding: 10px 0 30px; }
.tag-pill {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 8px 18px; border-radius: 999px;
  background: var(--paper-2); border: 1px solid var(--line);
  font-size: 15px; color: var(--ink-2);
  transition: all var(--t-fast) var(--ease-out);
}
.tag-pill:hover { border-color: var(--seal); color: var(--seal-ink); transform: translateY(-2px); }
.tag-pill b { font-size: 12px; color: var(--ink-3); background: var(--paper-3); border-radius: 999px; padding: 1px 8px; }

/* ============ 搜索页 ============ */
.search-box { position: relative; margin: 30px 0 26px; }
.search-box input {
  width: 100%; padding: 15px 20px 15px 48px;
  font-family: inherit; font-size: 16px;
  background: var(--paper-2); color: var(--ink);
  border: 1px solid var(--line-strong); border-radius: 999px;
  transition: border-color var(--t-fast), box-shadow var(--t-fast);
}
.search-box input:focus { border-color: var(--seal); box-shadow: 0 0 0 4px var(--glow); }
.search-box input:focus-visible { outline: 2px solid var(--seal); outline-offset: 2px; }
.search-box .ic { position: absolute; left: 16px; top: 50%; transform: translateY(-50%); color: var(--ink-3); }
.search-hint { text-align: center; color: var(--ink-3); font-size: 14px; padding: 40px 0; }

/* ============ 网址导航面板 ============ */
#fabLinks {
  position: fixed; right: 22px; bottom: 86px; z-index: 150;
  width: 46px; height: 46px; border-radius: 50%;
  background: var(--seal); color: #fff; border: none;
  box-shadow: 0 6px 20px var(--glow);
  display: flex; align-items: center; justify-content: center;
  transition: transform var(--t-mid) var(--ease-spring), box-shadow var(--t-mid);
}
#fabLinks:hover { transform: scale(1.1) rotate(-8deg); box-shadow: 0 8px 26px var(--glow); }
#fabLinks:active { transform: scale(.95); }

#linksMask, #loginMask {
  position: fixed; inset: 0; z-index: 400;
  background: rgba(8, 8, 12, .5);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  opacity: 0; transition: opacity var(--t-mid);
}
#linksMask.show, #loginMask.show { opacity: 1; }

#linksPanel {
  position: fixed; top: 0; right: 0; bottom: 0; z-index: 410;
  width: min(420px, 94vw);
  background: var(--paper);
  border-left: 1px solid var(--line);
  transform: translateX(102%);
  transition: transform var(--t-slow) var(--ease-out), visibility 0s linear var(--t-slow);
  display: flex; flex-direction: column;
  visibility: hidden;
}
#linksPanel.open { transform: translateX(0); visibility: visible; transition: transform var(--t-slow) var(--ease-out), visibility 0s; }
.sheet-head {
  display: flex; align-items: center; justify-content: space-between;
  padding: 20px 22px 14px;
}
.sheet-head h2 { margin: 0; font-size: 20px; letter-spacing: .1em; }
.panel-body { flex: 1; overflow-y: auto; padding: 0 22px 30px; }
.link-cat { margin: 18px 0 10px; font-size: 13px; letter-spacing: .25em; color: var(--ink-3); }
.link-item {
  display: flex; align-items: center; gap: 12px;
  padding: 11px 14px; margin-bottom: 8px;
  background: var(--paper-2); border: 1px solid var(--line); border-radius: 14px;
  transition: transform var(--t-fast) var(--ease-out), border-color var(--t-fast);
}
.link-item:hover { transform: translateX(4px); border-color: var(--seal); }
.link-ico {
  width: 38px; height: 38px; border-radius: 10px; flex: none;
  background: var(--paper-3); color: var(--seal-ink);
  display: flex; align-items: center; justify-content: center;
  font-size: 17px; font-weight: 700; overflow: hidden;
}
.link-ico img { width: 100%; height: 100%; object-fit: cover; }
.link-item .txt { min-width: 0; }
.link-item .name { font-weight: 700; font-size: 15px; }
.link-item .desc { font-size: 12.5px; color: var(--ink-3); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.link-empty { text-align: center; color: var(--ink-3); padding: 60px 0; font-size: 14px; }

/* ============ 登录弹窗 ============ */
#loginModal {
  position: fixed; z-index: 410; top: 50%; left: 50%;
  width: min(360px, 92vw);
  background: var(--paper-2);
  border: 1px solid var(--line-strong);
  border-radius: 22px;
  padding: 34px 32px 30px;
  box-shadow: 0 30px 80px rgba(0,0,0,.45);
  text-align: center;
  opacity: 0; pointer-events: none; visibility: hidden;
  transform: translate(-50%, -46%) scale(.96);
  transition: opacity var(--t-mid) var(--ease-out), transform var(--t-mid) var(--ease-spring), visibility 0s linear var(--t-mid);
}
#loginModal.open { opacity: 1; pointer-events: auto; visibility: visible; transform: translate(-50%, -50%) scale(1); transition: opacity var(--t-mid) var(--ease-out), transform var(--t-mid) var(--ease-spring), visibility 0s; }
.login-close { position: absolute; top: 12px; right: 12px; }
.seal-login { width: 52px; height: 52px; margin-bottom: 10px; }
.login-avatar {
  width: 56px; height: 56px; border-radius: 50%; object-fit: cover;
  border: 2px solid var(--line-strong); margin-bottom: 10px;
}
#loginModal h2 { margin: 0 0 4px; font-size: 22px; }
.login-sub { margin: 0 0 22px; font-size: 13.5px; color: var(--ink-3); }
#loginModal label { display: block; text-align: left; font-size: 13px; color: var(--ink-2); margin-bottom: 14px; }
#loginModal input {
  width: 100%; margin-top: 6px; padding: 12px 16px;
  font-family: inherit; font-size: 15px;
  background: var(--paper); color: var(--ink);
  border: 1px solid var(--line-strong); border-radius: 12px;
  transition: border-color var(--t-fast), box-shadow var(--t-fast);
}
#loginModal input:focus { border-color: var(--seal); box-shadow: 0 0 0 4px var(--glow); }
#loginModal input:focus-visible { outline: 2px solid var(--seal); outline-offset: 2px; }
.login-error { color: var(--seal-ink); font-size: 13.5px; margin: -4px 0 10px; }
#loginSubmit {
  width: 100%; padding: 13px; margin-top: 4px;
  font-family: inherit; font-size: 16px; font-weight: 700; letter-spacing: .2em; text-indent: .2em;
  color: #fff; background: var(--seal);
  border: none; border-radius: 12px;
  transition: transform var(--t-fast) var(--ease-spring), box-shadow var(--t-fast), filter var(--t-fast);
}
#loginSubmit:hover { filter: brightness(1.08); box-shadow: 0 6px 20px var(--glow); }
#loginSubmit:active { transform: scale(.97); }
#loginSubmit:disabled { opacity: .6; cursor: wait; }
#loginModal.shake { animation: shake .4s; }
@keyframes shake {
  0%, 100% { transform: translate(-50%, -50%); }
  25% { transform: translate(calc(-50% - 8px), -50%); }
  75% { transform: translate(calc(-50% + 8px), -50%); }
}

/* ============ 灯箱 ============ */
#lightbox {
  position: fixed; inset: 0; z-index: 500;
  background: rgba(5, 5, 8, .88);
  display: flex; align-items: center; justify-content: center;
  opacity: 0; pointer-events: none; visibility: hidden;
  transition: opacity var(--t-mid), visibility 0s linear var(--t-mid);
  cursor: zoom-out;
}
#lightbox.open { opacity: 1; pointer-events: auto; visibility: visible; transition: opacity var(--t-mid), visibility 0s; }
#lightbox img {
  max-width: 92vw; max-height: 90vh; border-radius: 8px;
  transform: scale(.92);
  transition: transform var(--t-mid) var(--ease-spring);
}
#lightbox.open img { transform: scale(1); }
.lightbox-close { position: absolute; top: 18px; right: 18px; color: #fff; width: 44px; height: 44px; }

/* ============ 回到顶部 ============ */
#toTop {
  position: fixed; right: 22px; bottom: 24px; z-index: 150;
  width: 46px; height: 46px; border-radius: 50%;
  background: var(--paper-2); color: var(--ink-2);
  border: 1px solid var(--line-strong);
  display: flex; align-items: center; justify-content: center;
  opacity: 0; pointer-events: none; visibility: hidden;
  transform: translateY(12px);
  transition: all var(--t-mid) var(--ease-out), visibility 0s linear var(--t-mid);
}
#toTop.show { opacity: 1; pointer-events: auto; visibility: visible; transform: none; transition: all var(--t-mid) var(--ease-out), visibility 0s; }
#toTop:hover { color: var(--seal-ink); border-color: var(--seal); }

/* ============ 页脚 ============ */
#footer {
  margin-top: 80px;
  border-top: 1px solid var(--line);
  background: var(--paper-2);
  text-align: center;
  padding: 44px 20px 40px;
}
.footer-inner { max-width: 640px; margin: 0 auto; }
.seal-foot { width: 40px; height: 40px; margin-bottom: 14px; }
.foot-avatar {
  width: 44px; height: 44px; border-radius: 50%; object-fit: cover;
  border: 1px solid var(--line-strong); margin-bottom: 14px;
}
.footer-run { font-size: 15px; color: var(--ink-2); margin: 0 0 6px; }
.footer-run b { color: var(--seal-ink); font-size: 18px; font-family: var(--font-mono); padding: 0 2px; }
.footer-run i { font-style: normal; margin: 0 10px; color: var(--ink-3); }
.footer-credit { font-size: 14px; color: var(--ink-2); margin: 0 0 8px; }
.footer-contact { font-size: 13px; color: var(--ink-2); margin: 0 0 10px; display: flex; flex-wrap: wrap; justify-content: center; align-items: center; }
.footer-contact a { color: var(--ink-2); border-bottom: 1px dashed var(--line-strong); white-space: nowrap; transition: color .18s ease, border-color .18s ease; }
.footer-contact a:hover { color: var(--seal-ink); border-bottom-color: var(--seal); }
.footer-contact i { font-style: normal; margin: 0 8px; color: var(--ink-3); }
/* 窄屏一行放不下就改竖排：链接本身 nowrap，靠容器的 flex-wrap 断行，不从链接中间截断 */
@media (max-width: 560px) {
  .footer-contact { flex-direction: column; gap: 1px; }
  .footer-contact i { display: none; }
}
.footer-sub { font-size: 12.5px; color: var(--ink-3); margin: 0; }
.footer-sub a { color: var(--ink-3); border-bottom: 1px dashed var(--ink-3); }
.footer-sub a:hover { color: var(--seal-ink); border-bottom-color: var(--seal); }
.footer-sub i { font-style: normal; margin: 0 8px; }

/* ============ Toast ============ */
#toast {
  position: fixed; left: 50%; bottom: 34px; z-index: 600;
  transform: translate(-50%, 20px);
  background: var(--paper-3); color: var(--ink);
  border: 1px solid var(--line-strong);
  padding: 11px 22px; border-radius: 999px;
  font-size: 14px; box-shadow: var(--shadow-card);
  opacity: 0; pointer-events: none;
  transition: opacity var(--t-mid), transform var(--t-mid) var(--ease-spring);
  max-width: 86vw; text-align: center;
}
#toast.show { opacity: 1; transform: translate(-50%, 0); }
#toast.err { border-color: var(--seal); color: var(--seal-ink); }

/* ============ 管理后台 ============ */
.admin-topbar {
  display: flex; align-items: center; gap: 10px; flex-wrap: wrap;
  padding: 96px 0 8px;
}
.admin-topbar h1 { margin: 0; font-size: 24px; flex: 1; }
.btn {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 9px 18px; border-radius: 12px;
  font-family: inherit; font-size: 14.5px; font-weight: 700;
  border: 1px solid var(--line-strong); background: var(--paper-2); color: var(--ink);
  transition: all var(--t-fast);
}
.btn:hover { border-color: var(--seal); color: var(--seal-ink); }
.btn.primary { background: var(--seal); border-color: var(--seal); color: #fff; }
.btn.primary:hover { filter: brightness(1.08); color: #fff; box-shadow: 0 6px 18px var(--glow); }
.btn.danger:hover { border-color: var(--seal); color: var(--seal-ink); background: var(--seal-soft); }
.btn.sm { padding: 5px 12px; font-size: 13px; border-radius: 9px; }

.admin-tabs { display: flex; gap: 4px; border-bottom: 1px solid var(--line); margin-bottom: 24px; overflow-x: auto; }
.admin-tabs button {
  padding: 11px 18px; font-size: 15px; color: var(--ink-3);
  background: none; border: none; border-bottom: 2px solid transparent;
  white-space: nowrap;
  transition: color var(--t-fast), border-color var(--t-fast);
}
.admin-tabs button:hover { color: var(--ink); }
.admin-tabs button.active { color: var(--seal-ink); border-bottom-color: var(--seal); font-weight: 700; }

.admin-list { display: flex; flex-direction: column; gap: 10px; }
.admin-row {
  display: flex; align-items: center; gap: 14px;
  background: var(--paper-2); border: 1px solid var(--line); border-radius: 14px;
  padding: 13px 18px;
  transition: border-color var(--t-fast);
}
.admin-row:hover { border-color: var(--line-strong); }
.admin-row .grow { flex: 1; min-width: 0; }
.admin-row .t { font-weight: 700; font-size: 15.5px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.admin-row .s { font-size: 12.5px; color: var(--ink-3); margin-top: 2px; }
.badge { font-size: 11.5px; padding: 2px 9px; border-radius: 999px; flex: none; }
.badge.pub { background: var(--seal-soft); color: var(--seal-ink); }
.badge.draft { background: var(--paper-3); color: var(--ink-3); }
.badge.pin { background: var(--paper-3); color: var(--ink-2); }
.admin-row .ops { display: flex; gap: 6px; flex: none; }

/* 管理列表：窄屏改为两行布局，避免正文被按钮挤成竖排 */
@media (max-width: 720px) {
  .admin-row {
    flex-wrap: wrap; align-items: flex-start; gap: 8px 10px;
    padding: 13px 14px;
  }
  .admin-row .badge { order: 0; }
  .admin-row .grow { order: 1; flex: 1 1 100%; min-width: 0; }
  .admin-row .t { white-space: normal; overflow: visible; word-break: break-word; }
  .admin-row .s { white-space: normal; word-break: break-word; }
  .admin-row .ops { order: 2; flex: 1 1 100%; flex-wrap: wrap; }
  .admin-row .ops .btn { flex: 1 1 auto; justify-content: center; min-width: 68px; }
  .admin-topbar { padding-top: 84px; }
  .admin-topbar h1 { flex: 1 1 100%; font-size: 22px; }
  .editor-pane textarea { height: 46vh; min-height: 260px; }
  .editor-preview { height: auto; max-height: 46vh; }
  .settings-form { max-width: none; }
}

/* 编辑器 */
.editor-head { display: flex; gap: 10px; flex-wrap: wrap; margin-bottom: 14px; }
.editor-head input.title {
  flex: 1; min-width: 220px; padding: 12px 16px;
  font-family: inherit; font-size: 18px; font-weight: 700;
  background: var(--paper-2); color: var(--ink);
  border: 1px solid var(--line-strong); border-radius: 12px;
}
.editor-head input.title:focus { border-color: var(--seal); }
.editor-head input.title:focus-visible { outline: 2px solid var(--seal); outline-offset: 2px; }
.editor-cols { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; align-items: start; }
@media (max-width: 900px) { .editor-cols { grid-template-columns: 1fr; } }
.editor-pane { border: 1px solid var(--line-strong); border-radius: 14px; overflow: hidden; background: var(--paper-2); }
.editor-pane .pane-tag { font-size: 12.5px; color: var(--ink-3); padding: 9px 16px; border-bottom: 1px solid var(--line); letter-spacing: .15em; }
.editor-pane textarea {
  width: 100%; height: 60vh; min-height: 380px;
  padding: 16px 18px; border: none; resize: vertical;
  font-family: var(--font-mono); font-size: 14.5px; line-height: 1.8;
  background: transparent; color: var(--ink);
}
.editor-pane textarea:focus-visible { outline: 2px solid var(--seal); outline-offset: -2px; }
.editor-preview { height: 60vh; min-height: 380px; overflow-y: auto; padding: 16px 20px; }
.editor-meta { display: flex; gap: 10px; flex-wrap: wrap; margin: 14px 0; }
.editor-meta input, .editor-meta select {
  padding: 9px 14px; font-family: inherit; font-size: 14px;
  background: var(--paper-2); color: var(--ink);
  border: 1px solid var(--line-strong); border-radius: 10px;
}
.editor-meta input:focus, .editor-meta select:focus { border-color: var(--seal); }
.editor-meta input:focus-visible, .editor-meta select:focus-visible { outline: 2px solid var(--seal); outline-offset: 2px; }
.editor-actions { display: flex; gap: 10px; flex-wrap: wrap; margin-top: 6px; }

/* 图片上传格式开关（三个上传入口共用同一偏好） */
.img-opt {
  display: inline-flex; align-items: center; gap: 6px; align-self: center;
  font-size: 13.5px; color: var(--ink-2); white-space: nowrap;
  cursor: pointer; user-select: none; -webkit-user-select: none;
}
.editor-meta .img-opt input, .img-opt input {
  width: 15px; height: 15px; padding: 0; margin: 0; border: 0; background: none;
  accent-color: var(--seal); cursor: pointer; flex: none;
}
.img-opt input:focus-visible { outline: 2px solid var(--seal); outline-offset: 2px; }
.img-opt.sm { font-size: 12.5px; gap: 5px; }
.editor-pane .pane-tag-row { display: flex; align-items: center; justify-content: space-between; gap: 10px; }
.pane-tools { display: inline-flex; align-items: center; gap: 10px; letter-spacing: 0; }

/* 动态编辑器 */
.moment-editor textarea {
  width: 100%; min-height: 110px; padding: 14px 16px;
  font-family: inherit; font-size: 15.5px; line-height: 1.8;
  background: var(--paper-2); color: var(--ink);
  border: 1px solid var(--line-strong); border-radius: 14px; resize: vertical;
}
.moment-editor textarea:focus { border-color: var(--seal); }
.moment-editor textarea:focus-visible { outline: 2px solid var(--seal); outline-offset: 2px; }
.moment-imgs-row { display: flex; gap: 8px; flex-wrap: wrap; margin-top: 10px; }
.moment-imgs-row .thumb { position: relative; width: 64px; height: 64px; }
.moment-imgs-row .thumb img { width: 100%; height: 100%; object-fit: cover; border-radius: 8px; }
.moment-imgs-row .thumb button {
  position: absolute; top: -7px; right: -7px; width: 20px; height: 20px;
  border-radius: 50%; border: none; background: var(--seal); color: #fff; font-size: 12px;
  display: flex; align-items: center; justify-content: center;
}

/* 链接编辑 */
.link-form { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: 10px; margin-bottom: 16px; }
.link-form input, .link-form select {
  padding: 10px 14px; font-family: inherit; font-size: 14px;
  background: var(--paper-2); color: var(--ink);
  border: 1px solid var(--line-strong); border-radius: 10px;
}
.link-form input:focus, .link-form select:focus { border-color: var(--seal); }
.link-form input:focus-visible, .link-form select:focus-visible { outline: 2px solid var(--seal); outline-offset: 2px; }

/* 设置表单 */
.settings-form { max-width: 560px; display: flex; flex-direction: column; gap: 14px; }
.settings-form label { font-size: 14px; color: var(--ink-2); display: block; }
.settings-form input, .settings-form textarea {
  width: 100%; margin-top: 6px; padding: 11px 14px;
  font-family: inherit; font-size: 15px;
  background: var(--paper-2); color: var(--ink);
  border: 1px solid var(--line-strong); border-radius: 10px;
}
.settings-form textarea { min-height: 80px; resize: vertical; }
.settings-form input:focus, .settings-form textarea:focus { border-color: var(--seal); }
.settings-form input:focus-visible, .settings-form textarea:focus-visible { outline: 2px solid var(--seal); outline-offset: 2px; }

/* ============ 空状态 / 加载 ============ */
.empty { text-align: center; color: var(--ink-3); padding: 70px 0; font-size: 15px; }
.empty::before { content: '❄'; display: block; font-size: 34px; margin-bottom: 12px; color: var(--ink-3); opacity: .6; }
.loading { text-align: center; color: var(--ink-3); padding: 60px 0; font-size: 14px; letter-spacing: .3em; }

/* 视图切换淡入 */
.view-enter { animation: viewIn .5s var(--ease-out); }
@keyframes viewIn { from { opacity: 0; transform: translateY(14px); } to { opacity: 1; transform: none; } }

/* 列表项入场（滚动触发） */
.reveal { opacity: 0; transform: translateY(18px); transition: opacity .6s var(--ease-out), transform .6s var(--ease-out); }
.reveal.in, .reveal:focus-within { opacity: 1; transform: none; }

/* ============ 响应式 ============ */
@media (max-width: 720px) {
  .nav-links { display: none; }
  .nav-actions { display: none; }        /* 主题/管理收进侧边栏，顶栏保持清爽 */
  #menuBtn { display: inline-flex; }
  body { font-size: 16px; }
  .article-card { padding: 20px 20px; border-radius: 15px; }
  .post-nav { grid-template-columns: 1fr; }
  .post-nav a.next { text-align: left; }
  #fabLinks { right: 16px; bottom: 78px; }
  #toTop { right: 16px; bottom: 22px; }
  .hero { min-height: calc(100vh - 56px); }
  #nav { height: 56px; }
  .post-wrap { padding-top: 92px; }
}

/* ============ 减少动态 ============ */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: .01ms !important;
    animation-delay: 0s !important;
    animation-iteration-count: 1 !important;
    transition-duration: .01ms !important;
    transition-delay: 0s !important;
  }
  html { scroll-behavior: auto; }
  #snowCanvas { display: none; }
  .reveal { opacity: 1 !important; transform: none !important; visibility: visible !important; }
  .rise { opacity: 1 !important; }
}

/* ============ 相关文章 ============ */
.related { margin-top: 34px; }
.related-title {
  font-size: 16px; font-weight: 700; margin: 0 0 14px;
  display: flex; align-items: center; gap: 10px;
}
.related-title::before {
  content: ''; width: 8px; height: 8px; border-radius: 2px;
  background: var(--seal); transform: rotate(45deg);
}
.related-list { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 12px; }
.related-item {
  display: block; padding: 14px 16px;
  background: var(--paper-2); border: 1px solid var(--line); border-radius: 14px;
  transition: transform var(--t-fast) var(--ease-out), border-color var(--t-fast);
}
.related-item:hover { transform: translateY(-2px); border-color: var(--seal); }
.related-name { display: block; font-size: 15px; font-weight: 700; margin-bottom: 4px; }
.related-item:hover .related-name { color: var(--seal-ink); }
.related-meta { font-size: 12.5px; color: var(--ink-3); }

/* 搜索关键词高亮 */
mark {
  background: var(--seal-soft); color: var(--seal-ink);
  border-radius: 3px; padding: 0 2px;
}

/* ============ 打印样式 ============ */
@media print {
  #nav, #footer, #snowCanvas, #fabLinks, #toTop, #tocBar, #progress,
  .post-actions, .post-nav, .related, .hero-scroll { display: none !important; }
  body { background: #fff; color: #000; font-size: 12pt; }
  .post-wrap { padding-top: 0; }
  .prose a { color: #000; text-decoration: underline; }
  .prose pre { border: 1px solid #ccc; background: #f7f7f7; page-break-inside: avoid; }
  .container, .container-wide { max-width: none; padding: 0; }
  .hero { min-height: auto; padding: 20px 0; }
  .hero::before, .hero::after { display: none; }
  /* 渐变字在「不打印背景图形」时会整块消失，必须回落到实色 */
  .hero-name { font-size: 28pt; background: none; -webkit-text-fill-color: currentColor; color: #000; }
  /* 列表项靠滚动进视口才淡入，打印不滚动，不复位就是一整页空白 */
  .reveal, .rise { opacity: 1 !important; transform: none !important; visibility: visible !important; }
}