/* ═══════════════════════════════════════════════════════
   设计令牌
══════════════════════════════════════════════════════ */
:root {
  --ease: cubic-bezier(0.4, 0, 0.2, 1);
  --spring: cubic-bezier(0.34, 1.56, 0.64, 1);
  --t: 0.32s;

  --ease-out-expo: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-in-out-quart: cubic-bezier(0.76, 0, 0.24, 1);
  --ease-back: cubic-bezier(0.34, 1.56, 0.64, 1);
  --t-fast: 0.18s;
  --t-slow: 0.55s;

  --gradient-aurora: linear-gradient(135deg, #58a6ff 0%, #bc8cff 50%, #ff7eb3 100%);
  --gradient-ocean: linear-gradient(135deg, #58a6ff 0%, #1e90ff 100%);
  --gradient-sunset: linear-gradient(135deg, #ff7eb3 0%, #ff8c42 100%);

  /* ◆ 新增：字体栈令牌（含中文字体回退，修正中文显示为系统默认字体的问题） */
  --font-sans: 'Inter', -apple-system, 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', 'Noto Sans SC', sans-serif;
  --font-mono: 'JetBrains Mono', 'SFMono-Regular', Consolas, 'PingFang SC', 'Microsoft YaHei', monospace;

  /* 暗色主题（默认） */
  --bg:            #0d1117;
  --bg-surface:    #161b22;
  --bg-elevated:   #1c2128;
  --bg-deep:       #090d12;
  --border:        #30363d;
  --border-subtle: #21262d;
  --text-1:        #e6edf3;
  --text-2:        #8b949e;
  --text-3:        #6e7681; /* ◆ 修改：提亮，改善小字对比度 */
  --accent:        #58a6ff;
  --accent-2:      #bc8cff;
  --accent-glow:   rgba(88,166,255,0.12);
  --accent-glow2:  rgba(188,140,255,0.10);
  /* ◆ 新增：主题感知的强调色边框/高光，替代散落的硬编码 rgba */
  --accent-border:       rgba(88,166,255,0.30);
  --accent-glow-strong:  rgba(88,166,255,0.22);
  --tag-bg:        #1c2a3a;
  --tag-text:      #58a6ff;
  --scrollbar:     #30363d;
  --shadow-sm:     0 2px 8px rgba(0,0,0,0.3);
  --shadow:        0 8px 32px rgba(0,0,0,0.45);
  --shadow-lg:     0 24px 64px rgba(0,0,0,0.6);
  --header-bg:     rgba(13,17,23,0.82);
  --noise-opacity: 0.035;
  --grid-color:    rgba(255,255,255,0.025);
  --dot-color:     rgba(88,166,255,0.15);

  /* 代码块专用 */
  --code-bg:       #0d1117;
  --code-surface:  #161b22;
  --code-border:   #30363d;
  --code-header:   #1c2128;
  --code-text:     #e6edf3;
  --code-comment:  #8b949e;
  --code-keyword:  #ff7b72;
  --code-function: #d2a8ff;
  --code-string:   #a5d6ff;
  --code-number:   #79c0ff;
  --code-type:     #ffa657;
  --code-tag:      #7ee787;
  --code-attr:     #79c0ff;
  --code-builtin:  #ffa657;
  --code-glow:     rgba(88,166,255,0.07);
}

[data-theme="light"] {
  --bg:            #f3f6fa;
  --bg-surface:    #ffffff;
  --bg-elevated:   #edf1f7;
  --bg-deep:       #e8edf5;
  --border:        #d0d7de;
  --border-subtle: #e4e9f0;
  --text-1:        #1c2128;
  --text-2:        #57606a;
  --text-3:        #6a737d; /* ◆ 修改：加深，亮色下原值对比度仅约 1.9:1 */
  --accent:        #0969da;
  --accent-2:      #8250df;
  --accent-glow:   rgba(9,105,218,0.08);
  --accent-glow2:  rgba(130,80,223,0.07);
  --accent-border:       rgba(9,105,218,0.30);
  --accent-glow-strong:  rgba(9,105,218,0.18);
  --tag-bg:        #ddf4ff;
  --tag-text:      #0550ae;
  --scrollbar:     #d0d7de;
  --shadow-sm:     0 2px 8px rgba(0,0,0,0.06);
  --shadow:        0 8px 32px rgba(0,0,0,0.10);
  --shadow-lg:     0 24px 64px rgba(0,0,0,0.14);
  --header-bg:     rgba(243,246,250,0.88);
  --noise-opacity: 0.02;
  --grid-color:    rgba(0,0,0,0.03);
  --dot-color:     rgba(9,105,218,0.12);

  --code-bg:       #f6f8fa;
  --code-surface:  #ffffff;
  --code-border:   #d0d7de;
  --code-header:   #f0f2f5;
  --code-text:     #1c2128;
  --code-comment:  #6a737d;
  --code-keyword:  #d73a49;
  --code-function: #6f42c1;
  --code-string:   #032f62;
  --code-number:   #005cc5;
  --code-type:     #e36209;
  --code-tag:      #22863a;
  --code-attr:     #005cc5;
  --code-builtin:  #e36209;
  --code-glow:     rgba(9,105,218,0.05);
}

/* ═══════════════════════════════════════════════════════
   基础重置
══════════════════════════════════════════════════════ */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }

body {
  font-family: var(--font-sans);
  background: var(--bg);
  color: var(--text-1);
  line-height: 1.6;
  min-height: 100vh;
  transition: background var(--t) var(--ease), color var(--t) var(--ease);
  overflow-x: hidden;   /* 旧浏览器回退 */
  overflow-x: clip;     /* ◆ 修改：clip 不产生滚动容器，不影响 sticky */
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  -webkit-tap-highlight-color: transparent;
  text-rendering: optimizeLegibility;
  /* ◆ 修改：页面淡入改为纯 CSS 动画（原 JS 在 load 事件里先隐藏再显示，会造成闪烁） */
  animation: pageFadeIn 0.5s var(--ease-out-expo) both;
}
@keyframes pageFadeIn { from { opacity: 0; } }

/* ◆ 新增：JS 不可用时的兜底（侧边栏不再隐形） */
html.no-js .sidebar-widget { opacity: 1; transform: none; animation: none; }

/* ◆ 新增：跳转链接（键盘用户可用 Tab 到达） */
.skip-link {
  position: fixed; top: -48px; left: 16px;
  z-index: 10001;
  background: var(--accent); color: #fff;
  padding: 8px 16px; border-radius: 8px;
  font-size: 13px; font-weight: 600;
  text-decoration: none;
  transition: top 0.2s var(--ease);
}
.skip-link:focus { top: 12px; }

::-webkit-scrollbar { width: 8px; height: 8px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb {
  background: var(--scrollbar);
  border-radius: 4px;
  border: 2px solid transparent;
  background-clip: padding-box;
}
::-webkit-scrollbar-thumb:hover { background: var(--accent); background-clip: padding-box; }

/* 焦点可访问性 */
:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
  border-radius: 4px;
}

/* ◆ 修改：文本选中改为主题感知配色，可读性更好 */
::selection {
  background: var(--accent-glow-strong);
  color: var(--text-1);
}

/* 尊重用户的减少动画偏好 */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

/* ═══════════════════════════════════════════════════════
   装饰背景层
══════════════════════════════════════════════════════ */
.bg-deco {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  overflow: hidden;
  --px: 0; --py: 0;
}

/* 网格线纹理 */
.bg-deco::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(var(--grid-color) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid-color) 1px, transparent 1px);
  background-size: 40px 40px;
  mask-image: radial-gradient(ellipse 80% 60% at 50% 0%, black 0%, transparent 70%);
  -webkit-mask-image: radial-gradient(ellipse 80% 60% at 50% 0%, black 0%, transparent 70%);
  transition: background-image var(--t) var(--ease);
}

/* 光晕渐变 */
.bg-deco-glow1 {
  position: absolute;
  width: 600px; height: 600px;
  border-radius: 50%;
  background: radial-gradient(circle, var(--accent-glow) 0%, transparent 70%);
  top: -200px; left: -100px;
  transition: background var(--t) var(--ease);
  animation: floatGlow1 12s ease-in-out infinite alternate;
  will-change: transform;
}
.bg-deco-glow2 {
  position: absolute;
  width: 500px; height: 500px;
  border-radius: 50%;
  background: radial-gradient(circle, var(--accent-glow2) 0%, transparent 70%);
  top: 100px; right: -150px;
  transition: background var(--t) var(--ease);
  animation: floatGlow2 15s ease-in-out infinite alternate;
  will-change: transform;
}
.bg-deco-glow3 {
  position: absolute;
  width: 400px; height: 400px;
  border-radius: 50%;
  background: radial-gradient(circle, var(--accent-glow) 0%, transparent 70%);
  bottom: 20%; left: 40%;
  transition: background var(--t) var(--ease);
  animation: floatGlow1 18s ease-in-out infinite alternate-reverse;
  will-change: transform;
}

@keyframes floatGlow1 {
  from { transform: translate(calc(var(--px, 0) * 30px), calc(var(--py, 0) * 20px)) scale(1); }
  to   { transform: translate(calc(40px + var(--px, 0) * 30px), calc(30px + var(--py, 0) * 20px)) scale(1.1); }
}
@keyframes floatGlow2 {
  from { transform: translate(calc(var(--px, 0) * -20px), calc(var(--py, 0) * -15px)) scale(1); }
  to   { transform: translate(calc(-30px + var(--px, 0) * -20px), calc(20px + var(--py, 0) * -15px)) scale(0.95); }
}

/* 扫描线 */
.bg-deco-scanline {
  position: absolute;
  inset: 0;
  background: repeating-linear-gradient(
    0deg,
    transparent,
    transparent 2px,
    rgba(0,0,0,0.015) 2px,
    rgba(0,0,0,0.015) 4px
  );
  pointer-events: none;
}

/* 鼠标跟随光斑 */
.cursor-glow {
  position: fixed;
  width: 360px; height: 360px;
  border-radius: 50%;
  background: radial-gradient(circle, var(--accent-glow) 0%, transparent 65%);
  pointer-events: none;
  z-index: 1;
  transform: translate(-50%, -50%);
  opacity: 0;
  transition: opacity 0.4s var(--ease);
  will-change: transform;
  mix-blend-mode: screen;
}
[data-theme="light"] .cursor-glow { mix-blend-mode: multiply; opacity: 0; }
.cursor-glow.active { opacity: 0.6; }

/* ◆ 修改：滚动进度条改为 scaleX 合成层动画（原 width 动画每次滚动都触发重排） */
.scroll-progress {
  position: fixed;
  top: 0; left: 0;
  height: 2px;
  width: 100%;
  background: var(--gradient-aurora);
  transform-origin: 0 50%;
  transform: scaleX(0);
  z-index: 9999;
  box-shadow: 0 0 12px var(--accent-glow);
  pointer-events: none;
  opacity: 1;
  transition: opacity 0.5s var(--ease);
  will-change: transform;
}
.scroll-progress.hidden { opacity: 0; }

/* ═══════════════════════════════════════════════════════
   顶部导航
══════════════════════════════════════════════════════ */
.header {
  position: sticky;
  top: 0;
  z-index: 200;
  background: var(--header-bg);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  border-bottom: 1px solid var(--border);
  transition: background var(--t) var(--ease), border-color var(--t) var(--ease);
}

.header::after {
  content: '';
  position: absolute;
  bottom: -1px;
  left: 0; right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--accent), var(--accent-2), transparent);
  opacity: 0.4;
  transition: opacity var(--t) var(--ease);
}

.header.scrolled {
  background: var(--header-bg);
  box-shadow: 0 4px 24px rgba(0,0,0,0.12);
}
.header.scrolled::after { opacity: 0.7; }

.header-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  height: 60px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  position: relative;
  z-index: 1;
}

.logo {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 15px;
  color: var(--text-1);
  text-decoration: none;
  letter-spacing: -0.5px;
  display: flex;
  align-items: center;
  gap: 0;
  transition: color var(--t) var(--ease);
  position: relative;
}

.logo::after {
  content: '';
  position: absolute;
  inset: -4px -8px;
  background: radial-gradient(ellipse at center, var(--accent-glow) 0%, transparent 70%);
  opacity: 0;
  transition: opacity var(--t) var(--ease);
  z-index: -1;
  border-radius: 8px;
}
.logo:hover::after { opacity: 1; }

.logo-bracket { color: var(--text-3); transition: color var(--t); }
.logo-name { color: var(--accent); transition: color var(--t); }
.logo-slash { color: var(--accent-2); margin: 0 1px; transition: color var(--t); }
.logo-sub { color: var(--text-2); font-size: 12px; transition: color var(--t); }

.logo-cursor {
  display: inline-block;
  width: 7px; height: 13px;
  background: var(--accent);
  border-radius: 1px;
  margin-left: 3px;
  vertical-align: text-bottom;
  animation: blink 1.1s step-end infinite;
  transition: background var(--t);
  box-shadow: 0 0 8px var(--accent);
}
@keyframes blink { 50% { opacity: 0; } }

.nav { display: flex; align-items: center; gap: 2px; }

.nav a {
  font-size: 13px;
  color: var(--text-2);
  text-decoration: none;
  padding: 6px 12px;
  border-radius: 7px;
  transition: color var(--t) var(--ease), background var(--t) var(--ease);
  font-weight: 500;
  position: relative;
}
.nav a:hover { color: var(--text-1); background: var(--bg-elevated); }

.nav a::after {
  content: '';
  position: absolute;
  bottom: 2px; left: 50%;
  width: 0; height: 1.5px;
  background: var(--accent);
  transition: width var(--t) var(--ease), left var(--t) var(--ease);
  border-radius: 1px;
}
.nav a:hover::after { width: 60%; left: 20%; }

.nav-divider {
  width: 1px; height: 18px;
  background: var(--border);
  margin: 0 6px;
  transition: background var(--t);
}

.theme-btn {
  width: 36px; height: 36px;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: var(--bg-surface);
  color: var(--text-2);
  cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  position: relative;
  transition: all var(--t) var(--ease);
  margin-left: 6px;
  overflow: hidden;
}
.theme-btn:hover { border-color: var(--accent); color: var(--accent); background: var(--accent-glow); }
.theme-btn svg {
  width: 15px; height: 15px;
  position: absolute;
  transition: transform 0.45s var(--spring), opacity var(--t) var(--ease);
}
[data-theme="dark"]  .icon-sun  { opacity: 1; transform: rotate(0) scale(1); }
[data-theme="dark"]  .icon-moon { opacity: 0; transform: rotate(90deg) scale(0.4); }
[data-theme="light"] .icon-sun  { opacity: 0; transform: rotate(-90deg) scale(0.4); }
[data-theme="light"] .icon-moon { opacity: 1; transform: rotate(0) scale(1); }

/* ═══════════════════════════════════════════════════════
   顶部横幅
══════════════════════════════════════════════════════ */
.hero {
  max-width: 1200px;
  margin: 0 auto;
  padding: 56px 24px 44px;
  position: relative;
  z-index: 1;
}

/* ◆ 修改：入场延迟整体收紧，首屏信息更快到位 */
.hero-eyebrow {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 16px;
  animation: heroFadeUp 0.8s var(--ease-out-expo) 0.05s both;
}

.hero-eyebrow-line {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 500;
  color: var(--accent);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  opacity: 0.85;
}

.hero-badge {
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: 5px;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 600;
  color: var(--accent);
  background: var(--accent-glow);
  border: 1px solid var(--accent-border); /* ◆ 修改：主题感知 */
  padding: 3px 9px;
  border-radius: 20px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}
/* ◆ 修改：呼吸光效改为 transform 缩放光环（box-shadow 动画每帧重绘） */
.hero-badge::after {
  content: '';
  position: absolute;
  inset: -1px;
  border-radius: 20px;
  border: 1px solid var(--accent);
  opacity: 0;
  pointer-events: none;
  animation: badgeRing 2.4s ease-out 1s infinite;
}
@keyframes badgeRing {
  0%        { transform: scale(1);    opacity: 0.45; }
  70%, 100% { transform: scale(1.28); opacity: 0; }
}

.hero-badge-dot {
  width: 5px; height: 5px;
  border-radius: 50%;
  background: var(--accent);
  animation: pulse 2.2s ease-in-out infinite;
  box-shadow: 0 0 6px var(--accent);
}
@keyframes pulse { 0%,100%{opacity:1;transform:scale(1)} 50%{opacity:0.5;transform:scale(0.7)} }

.hero h1 {
  font-size: clamp(28px, 4vw, 42px);
  font-weight: 600;
  letter-spacing: -0.035em;
  line-height: 1.12;
  margin-bottom: 14px;
  color: var(--text-1);
  transition: color var(--t);
  animation: heroFadeUp 0.9s var(--ease-out-expo) 0.12s both;
}

.hero h1 em { font-style: normal; color: var(--accent); transition: color var(--t); }
.hero h1 .em2 { font-style: normal; color: var(--accent-2); transition: color var(--t); }

.hero h1 em, .hero h1 .em2 {
  background-size: 200% 100%;
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  animation: shimmer 6s linear infinite;
}
.hero h1 em {
  background-image: linear-gradient(90deg, var(--accent) 0%, var(--accent-2) 50%, var(--accent) 100%);
}
.hero h1 .em2 {
  background-image: linear-gradient(90deg, var(--accent-2) 0%, var(--accent) 50%, var(--accent-2) 100%);
}
@keyframes shimmer {
  0% { background-position: 0% 50%; }
  100% { background-position: 200% 50%; }
}

@keyframes heroFadeUp {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}

.hero-bio {
  font-size: 15px;
  color: var(--text-2);
  max-width: 520px;
  line-height: 1.75;
  transition: color var(--t);
  animation: heroFadeUp 0.9s var(--ease-out-expo) 0.22s both;
}

.hero-stats {
  display: flex;
  gap: 0;
  margin-top: 32px;
  padding-top: 28px;
  border-top: 1px solid var(--border-subtle);
  transition: border-color var(--t);
  animation: heroFadeUp 0.9s var(--ease-out-expo) 0.32s both;
}

.stat {
  display: flex;
  flex-direction: column;
  gap: 3px;
  padding-right: 32px;
  margin-right: 32px;
  border-right: 1px solid var(--border-subtle);
  transition: border-color var(--t);
  position: relative;
}
.stat::after {
  content: '';
  position: absolute;
  bottom: -8px; left: 0;
  width: 0; height: 2px;
  background: var(--accent);
  transition: width var(--t) var(--ease);
  border-radius: 1px;
}
.stat:hover::after { width: 30%; }
.stat:last-child { border-right: none; margin-right: 0; padding-right: 0; }

.stat-num {
  font-family: var(--font-mono);
  font-size: 24px;
  font-weight: 700;
  color: var(--text-1);
  letter-spacing: -0.03em;
  transition: color var(--t);
  background: linear-gradient(135deg, var(--text-1) 0%, var(--text-2) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}
.stat-num span {
  color: var(--accent);
  -webkit-text-fill-color: var(--accent);
  transition: color var(--t);
}

.stat-label {
  font-size: 11px;
  color: var(--text-3);
  text-transform: uppercase;
  letter-spacing: 0.09em;
  font-weight: 500;
  transition: color var(--t);
}

/* ═══════════════════════════════════════════════════════
   筛选状态栏
══════════════════════════════════════════════════════ */
.filter-bar {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px 16px;
  position: relative;
  z-index: 1;
  display: none;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
  animation: filterBarSlide 0.4s var(--ease-out-expo);
}
@keyframes filterBarSlide {
  from { opacity: 0; transform: translateY(-10px); }
  to { opacity: 1; transform: translateY(0); }
}
.filter-bar.visible { display: flex; }

.filter-label {
  font-size: 12px; /* ◆ 修改：改用正文字体，普通访客更易读 */
  color: var(--text-3);
  letter-spacing: 0.02em;
  transition: color var(--t);
}

.filter-chip {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  font-size: 12px;
  font-weight: 500;
  color: var(--accent);
  background: var(--accent-glow);
  border: 1px solid var(--accent-border);
  padding: 3px 10px;
  border-radius: 20px;
  cursor: pointer;
  transition: all var(--t) var(--ease);
}
.filter-chip:hover { background: var(--accent-glow-strong); transform: translateY(-1px); }
.filter-chip-x {
  font-size: 14px;
  line-height: 1;
  margin-left: 2px;
  opacity: 0.7;
}
.filter-chip:hover .filter-chip-x { opacity: 1; }

.filter-clear {
  font-size: 12px;
  color: var(--text-3);
  cursor: pointer;
  padding: 3px 8px;
  border-radius: 6px;
  transition: all var(--t);
  border: 1px solid transparent;
}
.filter-clear:hover { color: var(--accent); border-color: var(--border); }

/* ═══════════════════════════════════════════════════════
   主体布局
══════════════════════════════════════════════════════ */
.main {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px 80px;
  display: grid;
  grid-template-columns: 1fr 288px;
  gap: 40px;
  align-items: start;
  position: relative;
  z-index: 1;
}

/* ═══════════════════════════════════════════════════════
   文章列表
══════════════════════════════════════════════════════ */
/* ◆ 修改：移除列表级共享透视（所有卡片共用一个消失点，上下卡片会歪），
   透视改为写入每张卡片自身的 transform */

.posts-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 20px;
}

.posts-title {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 600;
  color: var(--text-3);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  transition: color var(--t);
}

.posts-count {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--text-3);
  transition: color var(--t);
}

/* 无结果提示 */
.no-result {
  display: none;
  flex-direction: column;
  align-items: center;
  padding: 64px 24px;
  text-align: center;
  gap: 12px;
}
.no-result.visible { display: flex; }
.no-result-icon {
  font-size: 40px;
  margin-bottom: 4px;
  opacity: 0.5;
  animation: floatIcon 3s ease-in-out infinite;
}
@keyframes floatIcon {
  0%, 100% { transform: translateY(0) rotate(0deg); }
  50% { transform: translateY(-8px) rotate(-5deg); }
}
.no-result-text {
  font-size: 13px;
  color: var(--text-3);
  transition: color var(--t);
}

/* 骨架屏加载占位 */
.skeleton-card {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: 14px;
  margin-bottom: 14px;
  padding: 22px 22px 18px 26px;
  position: relative;
  overflow: hidden;
}
.skeleton-card::before {
  content: '';
  position: absolute;
  left: 0; top: 0; bottom: 0;
  width: 3px;
  background: var(--border);
  border-radius: 14px 0 0 14px;
}
.skeleton-line {
  height: 12px;
  background: linear-gradient(90deg, var(--border-subtle) 0%, var(--border) 50%, var(--border-subtle) 100%);
  background-size: 200% 100%;
  border-radius: 6px;
  margin-bottom: 10px;
  animation: skeletonShimmer 1.6s ease-in-out infinite;
}
.skeleton-line.short { width: 40%; }
.skeleton-line.medium { width: 70%; }
.skeleton-line.long { width: 100%; }
.skeleton-line.title { height: 18px; width: 65%; margin: 12px 0; }
@keyframes skeletonShimmer {
  0% { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}

/* 文章卡片 */
.post-card {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: 14px;
  margin-bottom: 14px;
  cursor: pointer;
  overflow: hidden;
  position: relative;
  transition:
    border-color var(--t) var(--ease),
    background var(--t) var(--ease),
    box-shadow 0.25s var(--ease),
    transform 0.18s var(--ease), /* ◆ 修改：缩短 transform 过渡，倾斜跟手不"漂" */
    opacity 0.28s var(--ease);
  contain: layout style;
  opacity: 0;
  /* ◆ 修改：透视内联到卡片自身 */
  transform: perspective(900px) translateY(16px) rotateX(var(--rx, 0deg)) rotateY(var(--ry, 0deg));
}
.post-card.reveal-visible {
  opacity: 1;
  transform: perspective(900px) translateY(0) rotateX(var(--rx, 0deg)) rotateY(var(--ry, 0deg));
}

/* 内部微高光 */
.post-card::before {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: 14px;
  background: linear-gradient(135deg, rgba(255,255,255,0.035) 0%, transparent 60%);
  pointer-events: none;
  transition: opacity var(--t);
}

/* 卡片鼠标跟随光斑（颜色改用主题令牌） */
.post-card::after {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: 14px;
  background: radial-gradient(600px circle at var(--mx, 50%) var(--my, 50%),
    var(--accent-glow), transparent 40%);
  opacity: 0;
  transition: opacity 0.3s var(--ease);
  pointer-events: none;
  z-index: 0;
}
.post-card:hover::after { opacity: 1; }

.post-card:hover {
  border-color: var(--accent);
  box-shadow: var(--shadow), 0 0 0 1px var(--accent), 0 0 24px var(--accent-glow);
  transform: perspective(900px) translateY(-4px) rotateX(var(--rx, 0deg)) rotateY(var(--ry, 0deg));
}
.post-card:hover::before { opacity: 1; }

.post-card.hidden {
  display: none;
}

/* 语言色条 */
.post-lang-stripe {
  position: absolute;
  left: 0; top: 0; bottom: 0;
  width: 3px;
  border-radius: 14px 0 0 14px;
  transition: width var(--t) var(--ease);
  z-index: 1;
}
.post-card:hover .post-lang-stripe { width: 4px; box-shadow: 0 0 12px currentColor; }

.stripe-rust     { background: linear-gradient(180deg, #f74c00, #ff8c42); }
.stripe-go       { background: linear-gradient(180deg, #00add8, #00d4ff); }
.stripe-ts       { background: linear-gradient(180deg, #3178c6, #4895d8); }
.stripe-python   { background: linear-gradient(180deg, #3776ab, #ffd343); }
.stripe-c        { background: linear-gradient(180deg, #a8b9cc, #c8d8e8); }
.stripe-shell    { background: linear-gradient(180deg, #4eaa25, #72d63a); }
.stripe-infra    { background: linear-gradient(180deg, #e040fb, #b900d4); }
.stripe-daily    { background: linear-gradient(180deg, #e05f8a, #ff8c42); } /* ◆ 新增：日常分类 */

.post-card-inner { padding: 22px 22px 18px 26px; position: relative; z-index: 1; }

.post-meta-row {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 10px;
  flex-wrap: wrap;
}

.post-lang-badge {
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 700;
  padding: 2px 7px;
  border-radius: 5px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  transition: background var(--t), color var(--t), transform var(--t);
}
.post-card:hover .post-lang-badge { transform: scale(1.05); }
.badge-rust     { background: rgba(247,76,0,.15);   color: #f74c00; }
.badge-go       { background: rgba(0,173,216,.15);  color: #00add8; }
.badge-ts       { background: rgba(49,120,198,.2);  color: #4895d8; }
.badge-python   { background: rgba(55,118,171,.2);  color: #5ba3dc; }
.badge-c        { background: rgba(168,185,204,.15);color: #a8b9cc; }
.badge-shell    { background: rgba(78,170,37,.15);  color: #4eaa25; }
.badge-infra    { background: rgba(224,64,251,.12); color: #e040fb; }
.badge-daily    { background: rgba(224,95,138,.15); color: #e05f8a; } /* ◆ 新增 */

/* ◆ 新增：亮色主题下徽章文字对比度修正 */
[data-theme="light"] .badge-rust   { background: rgba(247,76,0,.12);  color: #c2410c; }
[data-theme="light"] .badge-go     { background: rgba(0,173,216,.12); color: #0e7490; }
[data-theme="light"] .badge-ts     { background: rgba(49,120,198,.14);color: #1d4ed8; }
[data-theme="light"] .badge-python { background: rgba(55,118,171,.14);color: #1e5f9e; }
[data-theme="light"] .badge-c      { background: rgba(90,105,125,.14);color: #4b5563; }
[data-theme="light"] .badge-shell  { background: rgba(78,170,37,.12); color: #3f7c0f; }
[data-theme="light"] .badge-infra  { background: rgba(224,64,251,.12);color: #9333ea; }
[data-theme="light"] .badge-daily  { background: rgba(224,95,138,.14);color: #be3455; }

.post-date {
  font-size: 12px; /* ◆ 修改：日期/时长改正文字体并增大，非程序员访客更易读 */
  color: var(--text-3);
  transition: color var(--t);
}
.post-dot { width: 3px; height: 3px; border-radius: 50%; background: var(--border); flex-shrink: 0; transition: background var(--t); }
.post-read-time { font-size: 12px; color: var(--text-3); transition: color var(--t); }

.post-title {
  font-size: 16.5px;
  font-weight: 600;
  color: var(--text-1);
  letter-spacing: -0.02em;
  line-height: 1.45;
  margin-bottom: 8px;
  transition: color var(--t) var(--ease);
}
.post-card:hover .post-title { color: var(--accent); }

.post-excerpt {
  font-size: 13.5px;
  color: var(--text-2);
  line-height: 1.68;
  margin-bottom: 16px;
  transition: color var(--t);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.post-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.post-tags { display: flex; flex-wrap: wrap; gap: 5px; }

.tag {
  font-size: 12px; /* ◆ 修改：改正文字体 */
  background: var(--tag-bg);
  color: var(--tag-text);
  padding: 2px 8px;
  border-radius: 4px;
  font-weight: 500;
  transition: background var(--t), color var(--t), transform var(--t);
}
.post-card:hover .tag { transform: translateY(-1px); }

.post-arrow {
  width: 26px; height: 26px;
  border-radius: 6px;
  border: 1px solid var(--border);
  display: flex; align-items: center; justify-content: center;
  color: var(--text-3);
  flex-shrink: 0;
  transition: all var(--t) var(--ease);
}
.post-card:hover .post-arrow {
  border-color: var(--accent);
  color: var(--accent);
  background: var(--accent-glow);
  transform: translateX(4px) rotate(-10deg);
}

/* 置顶 */
.post-card.pinned { background: var(--bg-elevated); border-color: var(--accent); }
.pinned-badge {
  font-family: var(--font-mono);
  font-size: 10px; font-weight: 700;
  display: inline-flex;
  align-items: center;
  gap: 4px;
  color: var(--accent);
  background: var(--accent-glow);
  padding: 2px 7px; border-radius: 4px;
  letter-spacing: 0.04em;
  transition: background var(--t), color var(--t);
  box-shadow: 0 0 0 1px var(--accent-border);
}
/* ◆ P2：置顶徽章 icon（替换 📌 emoji） */
.pinned-badge .pinned-icon { width: 11px; height: 11px; flex-shrink: 0; }

/* ═══════════════════════════════════════════════════════
   搜索框
══════════════════════════════════════════════════════ */
.search-wrap { position: relative; margin-bottom: 20px; }

.search-input {
  width: 100%;
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 10px 72px 10px 38px; /* ◆ 修改：右侧为按钮留足空间，长文字不再钻到按钮下 */
  font-family: var(--font-sans); /* ◆ 修改：用户输入内容用正文字体 */
  font-size: 13px;
  color: var(--text-1);
  outline: none;
  caret-color: var(--accent);
  transition: all var(--t) var(--ease);
}
.search-input::placeholder { color: var(--text-3); }
.search-input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-glow), 0 4px 16px var(--accent-glow);
  background: var(--bg-elevated);
}

.search-icon {
  position: absolute; left: 12px; top: 50%;
  transform: translateY(-50%);
  color: var(--text-3);
  pointer-events: none;
  transition: color var(--t), transform var(--t);
}
.search-input:focus ~ .search-icon { color: var(--accent); transform: translateY(-50%) scale(1.1); }

/* ◆ 新增：快捷键提示（聚焦或输入时隐藏；触屏设备不显示） */
.search-kbd {
  position: absolute; right: 78px; top: 50%;
  transform: translateY(-50%);
  font-family: var(--font-mono);
  font-size: 10px;
  color: var(--text-3);
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-bottom-width: 2px;
  border-radius: 5px;
  padding: 1px 6px;
  pointer-events: none;
  transition: opacity var(--t) var(--ease);
}
.search-input:focus ~ .search-kbd,
.search-input:not(:placeholder-shown) ~ .search-kbd { opacity: 0; }

.search-btn {
  position: absolute; right: 6px; top: 50%;
  transform: translateY(-50%);
  font-family: var(--font-sans);
  font-size: 12px; font-weight: 600;
  color: #FFF;
  background: var(--accent);
  border: none;
  padding: 6px 14px;
  border-radius: 6px;
  cursor: pointer;
  transition: all var(--t) var(--ease);
}
.search-btn:hover { filter: brightness(1.12); transform: translateY(-50%) scale(1.04); }
.search-btn:active { transform: translateY(-50%) scale(0.95); }

/* ═══════════════════════════════════════════════════════
   加载更多
══════════════════════════════════════════════════════ */
.load-more { display: flex; justify-content: center; margin-top: 8px; }
.load-more-btn {
  font-family: var(--font-sans);
  font-size: 12px; font-weight: 500;
  color: var(--text-2);
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 9px 24px;
  cursor: pointer;
  transition: all var(--t) var(--ease);
  position: relative;
  overflow: hidden;
}
.load-more-btn::before {
  content: '';
  position: absolute;
  top: 0; left: -100%;
  width: 100%; height: 100%;
  background: linear-gradient(90deg, transparent, var(--accent-glow), transparent);
  transition: left 0.6s var(--ease);
}
.load-more-btn:hover::before { left: 100%; }
.load-more-btn:hover {
  border-color: var(--accent);
  color: var(--accent);
  background: var(--accent-glow);
  transform: translateY(-2px);
  box-shadow: 0 4px 16px var(--accent-glow);
}
.load-more-btn.loading {
  pointer-events: none;
  opacity: 0.7;
}
.load-more-btn .load-more-spinner {
  display: inline-block;
  width: 12px; height: 12px;
  border: 2px solid var(--text-3);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.6s linear infinite;
  vertical-align: middle;
  margin-right: 4px;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* ═══════════════════════════════════════════════════════
   侧边栏
══════════════════════════════════════════════════════ */
.sidebar {
  position: sticky;
  top: 80px;
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.sidebar-widget {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 18px 18px;
  transition: background var(--t), border-color var(--t), transform var(--t), box-shadow var(--t);
  position: relative;
  overflow: hidden;
  opacity: 0;
  transform: translateY(20px);
}
.sidebar-widget.reveal-visible {
  animation: sidebarReveal 0.7s var(--ease-out-expo) forwards;
}
@keyframes sidebarReveal {
  to { opacity: 1; transform: translateY(0); }
}

.sidebar-widget:hover {
  border-color: var(--border);
  box-shadow: var(--shadow-sm);
}

.sidebar-widget::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.07), transparent);
  pointer-events: none;
}

.widget-title {
  font-family: var(--font-mono);
  font-size: 10.5px;
  font-weight: 700;
  color: var(--text-3);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  margin-bottom: 13px;
  display: flex;
  align-items: center;
  gap: 8px;
  transition: color var(--t);
}
.widget-title::after {
  content: '';
  flex: 1; height: 1px;
  background: var(--border-subtle);
  transition: background var(--t);
}

/* 个人简介组件 */
.profile-widget { padding: 22px 18px 18px; }
.profile-top { display: flex; align-items: center; gap: 14px; margin-bottom: 12px; }

.avatar {
  width: 52px; height: 52px;
  border-radius: 50%;
  background: linear-gradient(135deg, #58a6ff 0%, #bc8cff 100%);
  display: flex; align-items: center; justify-content: center;
  font-family: var(--font-mono);
  font-size: 18px; font-weight: 700;
  color: white;
  flex-shrink: 0;
  box-shadow: 0 4px 16px var(--accent-glow-strong), 0 0 0 3px var(--bg-surface), 0 0 0 4px var(--accent-border); /* ◆ 修改：主题感知 */
  transition: box-shadow var(--t), transform var(--t);
  position: relative;
  cursor: pointer;
}
.avatar::before {
  content: '';
  position: absolute;
  inset: -6px;
  border-radius: 50%;
  background: conic-gradient(from 0deg, var(--accent), var(--accent-2), var(--accent));
  opacity: 0;
  z-index: -1;
  animation: avatarSpin 4s linear infinite;
  transition: opacity var(--t);
}
.avatar:hover::before { opacity: 0.6; }
.avatar:hover { transform: scale(1.05); }
@keyframes avatarSpin {
  to { transform: rotate(360deg); }
}

.profile-info { flex: 1; min-width: 0; }
.profile-name { font-size: 14px; font-weight: 600; color: var(--text-1); margin-bottom: 3px; transition: color var(--t); }
.profile-handle {
  font-family: var(--font-mono);
  font-size: 11px; color: var(--accent);
  display: flex; align-items: center; gap: 4px;
  transition: color var(--t);
}
.status-dot { width: 6px; height: 6px; border-radius: 50%; background: #3fb950; animation: pulse 2.5s ease-in-out infinite; box-shadow: 0 0 6px #3fb950; }

.profile-desc { font-size: 12px; color: var(--text-2); line-height: 1.65; margin-bottom: 14px; transition: color var(--t); }

.profile-links { display: flex; gap: 7px; }
.profile-link {
  width: 32px; height: 32px;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: var(--bg-elevated);
  display: flex; align-items: center; justify-content: center;
  color: var(--text-2);
  text-decoration: none;
  transition: all var(--t) var(--ease);
  position: relative;
  overflow: hidden;
}

/* 链接按钮波纹效果 */
.profile-link::before {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--accent-glow);
  transform: scale(0);
  transition: transform 0.4s var(--ease);
  border-radius: 50%;
}
.profile-link:hover::before { transform: scale(2); }
.profile-link:hover {
  border-color: var(--accent);
  color: var(--accent);
  transform: translateY(-3px);
  box-shadow: 0 6px 16px var(--accent-glow);
}
.profile-link svg { width: 14px; height: 14px; position: relative; z-index: 1; }

/* 分类列表 */
.category-list { display: flex; flex-direction: column; gap: 2px; }
.category-item {
  display: flex; align-items: center;
  justify-content: space-between;
  padding: 7px 9px;
  border-radius: 8px;
  cursor: pointer;
  transition: background var(--t) var(--ease), border-color var(--t) var(--ease), transform var(--t) var(--ease);
  text-decoration: none;
  border: 1px solid transparent;
}
.category-item:hover { background: var(--bg-elevated); transform: translateX(2px); }
.category-item.active {
  background: var(--accent-glow);
  border-color: var(--accent-border); /* ◆ 修改：主题感知 */
}
.cat-left { display: flex; align-items: center; gap: 8px; }
.cat-dot { width: 8px; height: 8px; border-radius: 2px; flex-shrink: 0; transition: transform var(--t); }
.category-item:hover .cat-dot { transform: scale(1.3) rotate(45deg); }
.cat-name { font-size: 13px; color: var(--text-2); font-weight: 500; transition: color var(--t); }
.category-item:hover .cat-name,
.category-item.active .cat-name { color: var(--text-1); }
.cat-count {
  font-family: var(--font-mono);
  font-size: 10px; color: var(--text-3);
  background: var(--bg-elevated);
  padding: 1px 6px; border-radius: 10px;
  transition: background var(--t), color var(--t);
}
.category-item.active .cat-count { background: var(--accent-glow); color: var(--accent); }

/* 标签云 */
.tags-cloud { display: flex; flex-wrap: wrap; gap: 6px; }
.tag-cloud-item {
  font-family: var(--font-sans); /* ◆ 修改：标签是"词"，用正文字体 */
  font-size: 12px; font-weight: 500;
  padding: 4px 10px;
  border-radius: 6px;
  background: var(--bg-elevated);
  color: var(--text-2);
  border: 1px solid var(--border-subtle);
  cursor: pointer;
  transition: all var(--t) var(--ease);
  text-decoration: none;
  opacity: 0;
  transform: scale(0.85) translateY(8px);
}
.tag-cloud-item.reveal-visible {
  animation: tagPop 0.4s var(--spring) forwards;
}
@keyframes tagPop {
  to { opacity: 1; transform: scale(1) translateY(0); }
}
.tag-cloud-item:hover {
  background: var(--tag-bg);
  color: var(--tag-text);
  border-color: var(--accent-border);
  transform: translateY(-2px) scale(1.05);
  box-shadow: 0 4px 12px var(--accent-glow);
}
.tag-cloud-item.active {
  background: var(--accent-glow);
  color: var(--accent);
  border-color: var(--accent-border);
  box-shadow: 0 2px 8px var(--accent-glow);
}

/* 年月归档（折叠树） */
.archive-tree { display: flex; flex-direction: column; gap: 3px; }

.archive-year-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 7px 9px;
  border-radius: 8px;
  cursor: pointer;
  transition: background var(--t) var(--ease);
  user-select: none;
  /* ◆ 重置 button 默认样式（archive-year-row 改为 <button>） */
  border: none;
  background: transparent;
  width: 100%;
  text-align: left;
  font: inherit;
  color: inherit;
}
.archive-year-row:hover { background: var(--bg-elevated); }
.archive-year-row:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }

.archive-year-left { display: flex; align-items: center; gap: 7px; }
.archive-year-arrow {
  width: 14px; height: 14px;
  color: var(--text-3);
  transition: transform 0.25s var(--ease), color var(--t);
  flex-shrink: 0;
}
.archive-year-row.open .archive-year-arrow { transform: rotate(90deg); }
.archive-year-row:hover .archive-year-arrow { color: var(--text-2); }

.archive-year-label {
  font-family: var(--font-mono);
  font-size: 12px; font-weight: 600;
  color: var(--text-1);
  transition: color var(--t);
}
.archive-year-count {
  font-family: var(--font-mono);
  font-size: 10px; color: var(--text-3);
  background: var(--bg-elevated);
  padding: 1px 6px; border-radius: 10px;
  transition: background var(--t), color var(--t);
}

.archive-months {
  overflow: hidden;
  max-height: 0;
  transition: max-height 0.35s var(--ease);
  padding-left: 20px;
}
.archive-months.open { max-height: 600px; } /* ◆ 修改：月份多时不被截断 */

.archive-month-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 5px 9px;
  border-radius: 7px;
  cursor: pointer;
  transition: background var(--t) var(--ease);
  text-decoration: none;
  gap: 8px;
  /* ◆ 重置 button 默认样式（archive-month-row 改为 <button>） */
  border: none;
  background: transparent;
  width: 100%;
  text-align: left;
  font: inherit;
  color: inherit;
}
.archive-month-row:hover { background: var(--bg-elevated); }
.archive-month-row:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
.archive-month-row.active { background: var(--accent-glow); }

.archive-month-name {
  font-family: var(--font-sans); /* ◆ 修改：改正文字体 */
  font-size: 12px; color: var(--text-2);
  font-weight: 500;
  transition: color var(--t);
  white-space: nowrap;
}
.archive-month-row:hover .archive-month-name,
.archive-month-row.active .archive-month-name { color: var(--accent); }

.archive-month-bar-wrap {
  display: flex; align-items: center; gap: 7px; flex: 1;
}
.archive-month-bar {
  height: 3px;
  border-radius: 2px;
  background: var(--accent);
  opacity: 0.4;
  flex-shrink: 0;
  transition: opacity var(--t), background var(--t), width var(--t) var(--ease);
}
.archive-month-row:hover .archive-month-bar,
.archive-month-row.active .archive-month-bar { opacity: 1; }

.archive-month-n {
  font-family: var(--font-mono);
  font-size: 10px; color: var(--text-3);
  transition: color var(--t);
}

/* ═══════════════════════════════════════════════════════
   文章弹窗
══════════════════════════════════════════════════════ */
.modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.65);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  z-index: 500;
  opacity: 0;
  visibility: hidden; /* ◆ 修改：关闭时移出无障碍树，且焦点不会落入隐藏弹窗 */
  pointer-events: none;
  transition: opacity 0.3s var(--ease), visibility 0s 0.3s;
  display: flex;
  align-items: flex-start;
  justify-content: center;
  padding: 32px 16px;
  overflow-y: auto;
}
.modal-backdrop.open {
  opacity: 1;
  visibility: visible;
  pointer-events: all;
  transition: opacity 0.3s var(--ease);
}

.modal {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: 18px;
  width: 100%;
  max-width: 780px;
  position: relative;
  box-shadow: var(--shadow-lg);
  transform: translateY(24px) scale(0.97);
  transition: transform 0.35s var(--spring), background var(--t), border-color var(--t);
  overflow: hidden;
  margin: auto;
}
.modal-backdrop.open .modal {
  transform: translateY(0) scale(1);
}

/* 弹窗内容级联入场 */
.modal-backdrop.open .modal-header,
.modal-backdrop.open .modal-title,
.modal-backdrop.open .modal-desc,
.modal-backdrop.open .modal-footer {
  opacity: 0;
  animation: modalPartIn 0.45s var(--ease-out-expo) forwards;
}
.modal-backdrop.open .modal-header { animation-delay: 0.10s; }
.modal-backdrop.open .modal-title  { animation-delay: 0.15s; }
.modal-backdrop.open .modal-desc   { animation-delay: 0.20s; }
.modal-backdrop.open .modal-footer { animation-delay: 0.30s; }
.modal-body-content { animation: modalPartIn 0.45s var(--ease-out-expo) forwards; }
@keyframes modalPartIn {
  from { opacity: 0; transform: translateY(14px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* 弹窗加载骨架屏 */
.modal-loading {
  padding: 48px 32px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
}
.modal-loading-spinner {
  width: 32px; height: 32px;
  border-radius: 50%;
  border: 2px solid var(--border);
  border-top-color: var(--accent);
  animation: spin 0.8s linear infinite;
}
.modal-loading-text {
  font-size: 12px;
  color: var(--text-3);
}

/* 弹窗顶部色条 */
.modal-top-stripe {
  height: 3px;
  width: 100%;
  position: relative;
  overflow: hidden;
}
.modal-top-stripe::after {
  content: '';
  position: absolute;
  top: 0; left: -30%;
  width: 30%; height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.5), transparent);
  animation: stripeShine 3s ease-in-out infinite;
}
@keyframes stripeShine {
  0% { left: -30%; }
  100% { left: 100%; }
}

.modal-header {
  padding: 28px 32px 20px;
  border-bottom: 1px solid var(--border-subtle);
  transition: border-color var(--t);
}

.modal-meta {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 14px;
  flex-wrap: wrap;
}

.modal-title {
  font-size: 22px;
  font-weight: 700;
  color: var(--text-1);
  letter-spacing: -0.025em;
  line-height: 1.35;
  margin-bottom: 10px;
  transition: color var(--t);
}

.modal-desc {
  font-size: 14px;
  color: var(--text-2);
  line-height: 1.75;
  transition: color var(--t);
}

.modal-close {
  position: absolute;
  top: 20px; right: 20px;
  width: 32px; height: 32px;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: var(--bg-elevated);
  color: var(--text-2);
  display: flex; align-items: center; justify-content: center;
  cursor: pointer;
  transition: all var(--t) var(--ease);
  font-size: 16px;
  line-height: 1;
  z-index: 2;
}
.modal-close:hover {
  border-color: var(--accent);
  color: var(--accent);
  background: var(--accent-glow);
  transform: rotate(90deg);
}

.modal-body { padding: 28px 32px 32px; }
.modal-body img {
  max-width: 100%;
  height: auto;
  border-radius: 8px;
  display: block;
  margin: 16px 0;
  cursor: zoom-in;
  transition: transform 0.3s var(--ease), box-shadow 0.3s var(--ease);
}
.modal-body img:active {
  transform: scale(1.03);
  box-shadow: var(--shadow-lg);
}

/* 弹窗正文排版：标题层级 */
.modal-body h3 {
  font-size: 18px;
  font-weight: 600;
  color: var(--text-1);
  margin: 28px 0 12px;
  letter-spacing: -0.02em;
  transition: color var(--t);
}
.modal-body h4 {
  font-size: 15px;
  font-weight: 600;
  color: var(--text-1);
  margin: 24px 0 10px;
  transition: color var(--t);
}
.modal-body h3 + p, .modal-body h4 + p { margin-top: 0; }

/* 弹窗正文排版：列表 */
.modal-body ul, .modal-body ol {
  margin: 12px 0 16px;
  padding-left: 24px;
  color: var(--text-2);
  line-height: 1.8;
  font-size: 14.5px;
}
.modal-body ul { list-style: disc; }
.modal-body ul ul { list-style: circle; }
.modal-body ol { list-style: decimal; }
.modal-body li { margin-bottom: 4px; }
.modal-body li strong { color: var(--text-1); }

/* 弹窗正文排版：引用 */
.modal-body blockquote {
  margin: 18px 0;
  padding: 14px 20px;
  border-left: 3px solid var(--accent);
  background: var(--accent-glow);
  border-radius: 0 8px 8px 0;
  color: var(--text-2);
  font-size: 14px;
  line-height: 1.7;
  transition: background var(--t), border-color var(--t);
}
.modal-body blockquote p { margin-bottom: 0; }
.modal-body blockquote strong { color: var(--text-1); }

/* 弹窗正文排版：表格 */
.modal-body table {
  width: 100%;
  border-collapse: collapse;
  margin: 16px 0;
  font-size: 13.5px;
  color: var(--text-2);
  transition: color var(--t);
  overflow-x: auto;
  display: block;
}
.modal-body th, .modal-body td {
  padding: 10px 14px;
  border: 1px solid var(--border);
  text-align: left;
  transition: border-color var(--t);
}
.modal-body th {
  background: var(--bg-elevated);
  color: var(--text-1);
  font-weight: 600;
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}
.modal-body tr:nth-child(even) { background: var(--bg-deep); }

/* 弹窗正文排版：分割线 */
.modal-body hr {
  border: none;
  height: 1px;
  background: var(--border-subtle);
  margin: 28px 0;
  transition: background var(--t);
}

/* ═══════════════════════════════════════════════════════
   代码块 & 行内代码
══════════════════════════════════════════════════════ */

/* 行内代码 */
.modal-body code:not(pre code) {
  font-family: var(--font-mono);
  font-size: 0.88em;
  padding: 2px 7px;
  border-radius: 5px;
  background: var(--code-bg);
  color: var(--code-function);
  border: 1px solid var(--code-border);
  transition: background var(--t), color var(--t), border-color var(--t);
}

/* 代码块容器 */
.code-block {
  background: var(--code-bg);
  border: 1px solid var(--code-border);
  border-radius: 12px;
  overflow: hidden;
  margin: 20px 0;
  font-family: var(--font-mono);
  font-size: 13px;
  box-shadow: 0 2px 12px rgba(0,0,0,0.15), inset 0 1px 0 rgba(255,255,255,0.03);
  transition: background var(--t) var(--ease),
              border-color var(--t) var(--ease),
              box-shadow var(--t) var(--ease);
}
.code-block:hover {
  box-shadow: 0 4px 24px var(--code-glow), inset 0 1px 0 rgba(255,255,255,0.05);
  border-color: var(--accent-border); /* ◆ 修改：主题感知 */
}

/* 代码块顶部栏 */
.code-block-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 16px;
  border-bottom: 1px solid var(--code-border);
  background: var(--code-header);
  user-select: none;
  transition: background var(--t), border-color var(--t);
}

/* macOS 风格红黄绿圆点 */
.code-block-dots { display: flex; gap: 6px; padding-left: 4px; }
.dot {
  width: 11px; height: 11px; border-radius: 50%;
  transition: filter 0.2s, transform 0.2s;
}
.dot:hover { filter: brightness(1.2); transform: scale(1.15); }
.dot-r { background: #ff5f57; }
.dot-y { background: #febc2e; }
.dot-g { background: #28c840; }

/* 代码语言标签 */
.code-block-lang {
  font-family: var(--font-mono);
  font-size: 10px; letter-spacing: 0.1em;
  color: var(--text-3); text-transform: uppercase;
  font-weight: 500;
  transition: color var(--t);
}

/* 复制按钮 */
.code-block-copy {
  font-family: var(--font-mono);
  font-size: 10px;
  padding: 3px 10px;
  border-radius: 5px;
  border: 1px solid var(--code-border);
  background: transparent;
  color: var(--text-3);
  cursor: pointer;
  transition: all 0.2s var(--ease);
  opacity: 0;
}
.code-block:hover .code-block-copy { opacity: 1; }
.code-block-copy:hover {
  background: var(--accent-glow);
  color: var(--accent);
  border-color: var(--accent);
}
.code-block-copy.copied {
  background: rgba(63,185,80,0.15);
  color: #3fb950;
  border-color: rgba(63,185,80,0.4);
}

/* 代码内容区 */
.code-block pre {
  padding: 18px 20px;
  margin: 0;
  overflow-x: auto;
  line-height: 1.75;
  color: var(--code-text);
  white-space: pre;
  font-family: var(--font-mono);
  font-size: 13px;
  tab-size: 2;
  transition: color var(--t);
}

/* 行号（可选） */
.code-line-num {
  display: inline-block;
  width: 2.5em;
  text-align: right;
  padding-right: 1em;
  color: var(--text-3);
  user-select: none;
  opacity: 0.5;
}

/* ══ 语法高亮色 ══ */
.code-kw    { color: var(--code-keyword); font-weight: 600; }
.code-fn    { color: var(--code-function); }
.code-str   { color: var(--code-string); }
.code-num   { color: var(--code-number); }
.code-cmt   { color: var(--code-comment); font-style: italic; }
.code-ty    { color: var(--code-type); }
.code-tag   { color: var(--code-tag); }
.code-attr  { color: var(--code-attr); }
.code-built { color: var(--code-builtin); font-weight: 500; }

.code-deco {
  color: var(--text-3);
  font-weight: 400;
}

/* Fallback：未增强的 <pre> 直接展示 */
.modal-body pre:not(.code-block pre) {
  background: var(--code-bg);
  border: 1px solid var(--code-border);
  border-radius: 10px;
  padding: 16px 20px;
  overflow-x: auto;
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 1.7;
  color: var(--code-text);
  margin: 18px 0;
  tab-size: 2;
  transition: background var(--t), border-color var(--t), color var(--t);
}

.modal-section-title {
  font-family: var(--font-mono);
  font-size: 11px; font-weight: 700;
  color: var(--text-3);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin: 22px 0 10px;
  display: flex; align-items: center; gap: 8px;
  transition: color var(--t);
}
.modal-section-title::after {
  content: ''; flex: 1; height: 1px;
  background: var(--border-subtle);
  transition: background var(--t);
}

.modal-para {
  font-size: 14.5px;
  color: var(--text-2);
  line-height: 1.82;
  margin-bottom: 14px;
  transition: color var(--t);
}
.modal-para strong { color: var(--text-1); font-weight: 600; transition: color var(--t); }

.modal-tags { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 8px; }
.modal-tag {
  font-family: var(--font-sans);
  font-size: 12px; font-weight: 500;
  padding: 4px 10px; border-radius: 6px;
  background: var(--tag-bg); color: var(--tag-text);
  transition: background var(--t), color var(--t);
}

.modal-footer {
  padding: 16px 32px;
  border-top: 1px solid var(--border-subtle);
  display: flex;
  align-items: center;
  justify-content: space-between;
  transition: border-color var(--t);
}
.modal-read-btn {
  font-family: var(--font-sans);
  font-size: 12px; font-weight: 600;
  color: var(--bg);
  background: var(--accent);
  border: none;
  border-radius: 8px;
  padding: 9px 20px;
  cursor: pointer;
  display: flex; align-items: center; gap: 7px;
  transition: all var(--t) var(--ease);
  letter-spacing: 0.02em;
  position: relative;
  overflow: hidden;
}
.modal-read-btn::before {
  content: '';
  position: absolute;
  top: 0; left: -100%;
  width: 100%; height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.3), transparent);
  transition: left 0.6s var(--ease);
}
.modal-read-btn:hover::before { left: 100%; }
.modal-read-btn:hover {
  background: var(--accent-2);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px var(--accent-glow);
}
.modal-share-btn {
  font-family: var(--font-sans);
  font-size: 12px; color: var(--text-2);
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 8px 16px;
  cursor: pointer;
  display: flex; align-items: center; gap: 6px;
  transition: all var(--t) var(--ease);
}
.modal-share-btn:hover {
  border-color: var(--accent);
  color: var(--accent);
  background: var(--accent-glow);
  transform: translateY(-1px);
}

/* ═══════════════════════════════════════════════════════
   页脚
══════════════════════════════════════════════════════ */
.footer {
  border-top: 1px solid var(--border-subtle);
  padding: 24px;
  position: relative;
  z-index: 1;
  transition: border-color var(--t);
  background: linear-gradient(180deg, transparent, var(--bg-deep));
}
.footer-inner {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
}
.footer-copy {
  font-size: 12px; color: var(--text-3); /* ◆ 修改：改正文字体，11→12px */
  transition: color var(--t);
}
.footer-copy span { color: var(--accent); transition: color var(--t); }
.footer-right { display: flex; align-items: center; gap: 16px; }
.footer-link {
  font-size: 12px; color: var(--text-3);
  text-decoration: none;
  display: flex; align-items: center; gap: 5px;
  transition: color var(--t) var(--ease);
}
.footer-link:hover { color: var(--accent); }
.rss-dot {
  width: 6px; height: 6px;
  border-radius: 50%; background: #f74c00;
  animation: pulse 2s ease-in-out infinite;
  box-shadow: 0 0 6px #f74c00;
}

/* ═══════════════════════════════════════════════════════
   主题过渡遮罩
══════════════════════════════════════════════════════ */
.theme-overlay {
  position: fixed; inset: 0;
  pointer-events: none;
  z-index: 9999;
  opacity: 0;
  background: var(--bg);
  transition: opacity 0.28s var(--ease);
}
.theme-overlay.flash { opacity: 0.35; }

.theme-ripple {
  position: fixed;
  border-radius: 50%;
  pointer-events: none;
  z-index: 9998;
  transform: translate(-50%, -50%) scale(0);
  transition: transform 0.6s var(--ease-in-out-quart), opacity 0.4s 0.4s ease;
  opacity: 1;
}
.theme-ripple.expanded {
  transform: translate(-50%, -50%) scale(1);
  opacity: 0;
}

.toast {
  position: fixed;
  bottom: 24px;
  left: 50%;
  transform: translate(-50%, 20px);
  z-index: 10000;
  background: var(--bg-elevated);
  color: var(--text-1);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 10px 18px;
  font-size: 13px;
  font-weight: 500;
  box-shadow: var(--shadow-lg);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s var(--ease), transform 0.35s var(--spring);
  display: flex;
  align-items: center;
  gap: 8px;
}
.toast.show {
  opacity: 1;
  transform: translate(-50%, 0);
  pointer-events: auto;
}
.toast-icon {
  width: 16px; height: 16px;
  color: var(--accent);
  flex-shrink: 0;
}

/* 回到顶部按钮 */
.back-to-top {
  position: fixed;
  right: 24px;
  bottom: 24px;
  width: 40px; height: 40px;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: var(--bg-surface);
  color: var(--text-2);
  display: flex; align-items: center; justify-content: center;
  cursor: pointer;
  opacity: 0;
  transform: translateY(20px);
  pointer-events: none;
  transition: all var(--t) var(--ease);
  z-index: 150;
  box-shadow: var(--shadow-sm);
}
.back-to-top.visible {
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
}
.back-to-top:hover {
  border-color: var(--accent);
  color: var(--accent);
  background: var(--accent-glow);
  transform: translateY(-2px);
}

/* ═══════════════════════════════════════════════════════
   响应式
══════════════════════════════════════════════════════ */
@media (max-width: 900px) {
  .main { grid-template-columns: 1fr; }
  .sidebar { position: static; }
  .cursor-glow { display: none; }
}
@media (max-width: 600px) {
  .nav-links { display: none; }
  .nav-divider { display: none; }
  .hero { padding: 36px 16px 28px; }
  .main { padding: 0 16px 60px; }
  .modal { border-radius: 14px; margin: 10px; }
  .modal-header { padding: 22px 20px 16px; }
  .modal-body { padding: 20px 20px 24px; }
  .modal-footer { padding: 14px 20px; }
  .hero-stats {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px 0;
    margin-top: 24px;
    padding-top: 20px;
  }
  .stat {
    padding-right: 0;
    margin-right: 0;
    border-right: none;
  }
  .stat:nth-child(odd) { border-right: 1px solid var(--border-subtle); padding-left: 12px; }
  .stat:nth-child(even) { padding-left: 20px; }
  .stat:nth-child(3),
  .stat:nth-child(4) { padding-top: 8px; }

  .code-block { border-radius: 8px; font-size: 12px; }
  .code-block-header { padding: 8px 12px; }
  .code-block pre { padding: 14px 12px; font-size: 12px; }
  .code-block-copy { opacity: 1; font-size: 9px; padding: 2px 8px; }
  .code-block-lang { font-size: 9px; }
  .dot { width: 9px; height: 9px; }
  .modal-body code:not(pre code) { font-size: 0.82em; padding: 1px 5px; }

  .modal-body table { font-size: 12px; }
  .modal-body th, .modal-body td { padding: 6px 8px; }

  .search-kbd { display: none; }
}

/* ◆ 新增：触屏设备 —— 无 hover 的元素始终可见 */
@media (hover: none) {
  .cursor-glow { display: none; }
  .search-kbd { display: none; }
  .code-block-copy { opacity: 1; }
}

/* 移动端导航汉堡菜单 */
.nav-mobile-toggle {
  display: none;
  width: 36px; height: 36px;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: var(--bg-surface);
  color: var(--text-2);
  cursor: pointer;
  align-items: center;
  justify-content: center;
  transition: all var(--t) var(--ease);
  font-size: 18px;
  line-height: 1;
  margin-left: 4px;
}
.nav-mobile-toggle:hover {
  border-color: var(--accent);
  color: var(--accent);
  background: var(--accent-glow);
}
.nav-mobile-toggle.open { background: var(--accent-glow); border-color: var(--accent); color: var(--accent); }

.nav-mobile-panel {
  position: fixed;
  top: 60px; left: 0; right: 0;
  background: var(--bg-surface);
  border-bottom: 1px solid var(--border);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  padding: 12px 16px;
  display: flex;
  flex-direction: column;
  gap: 4px;
  z-index: 199;
  transform: translateY(-12px);
  opacity: 0;
  pointer-events: none;
  transition: transform 0.3s var(--ease), opacity 0.25s var(--ease);
  box-shadow: var(--shadow);
}
.nav-mobile-panel.open {
  transform: translateY(0);
  opacity: 1;
  pointer-events: auto;
}
.nav-mobile-panel a {
  font-size: 14px;
  color: var(--text-2);
  text-decoration: none;
  padding: 10px 14px;
  border-radius: 8px;
  font-weight: 500;
  transition: color var(--t) var(--ease), background var(--t) var(--ease);
  display: flex;
  align-items: center;
  gap: 10px;
}
/* ◆ P2：移动导航 SVG 图标尺寸（替换 emoji） */
.nav-mobile-panel .nav-m-icon { width: 16px; height: 16px; flex-shrink: 0; opacity: 0.85; }
.nav-mobile-panel a:hover {
  color: var(--text-1);
  background: var(--bg-elevated);
}

@media (max-width: 600px) {
  .nav-mobile-toggle { display: flex; }
}

/* ═══════════════════════════════════════════════════════
   ◆ 新增：浏览量（卡片 / 弹窗 meta 共用）
═══════════════════════════════════════════════════════ */
.post-views {
  display: inline-flex; align-items: center; gap: 4px;
  font-size: 12px; color: var(--text-3);
}
.post-views svg { opacity: 0.7; }

/* ═══════════════════════════════════════════════════════
   ◆ 新增：点赞按钮（弹窗底部）
═══════════════════════════════════════════════════════ */
.modal-like-btn {
  font-family: var(--font-sans);
  font-size: 12px; color: var(--text-2);
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 8px 16px;
  cursor: pointer;
  display: flex; align-items: center; gap: 6px;
  transition: all var(--t) var(--ease);
}
.modal-like-btn:hover:not(:disabled) {
  color: #ff6b81;
  border-color: rgba(255,107,129,0.45);
  box-shadow: 0 0 0 3px rgba(255,107,129,0.10);
  transform: translateY(-1px);
}
.modal-like-btn:disabled { cursor: not-allowed; opacity: 0.85; }
.modal-like-btn .like-heart { transition: transform var(--t) var(--spring); }
.modal-like-btn.liked { color: #ff6b81; border-color: rgba(255,107,129,0.40); }
.modal-like-btn.liked .like-heart { fill: #ff6b81; stroke: #ff6b81; }
.modal-like-btn.liked .like-count { color: #ff6b81; font-weight: 600; }
.modal-like-btn.pop .like-heart { animation: likeHeartPop 0.45s var(--spring); }
@keyframes likeHeartPop {
  0%   { transform: scale(1); }
  40%  { transform: scale(1.55) rotate(-8deg); }
  70%  { transform: scale(0.85); }
  100% { transform: scale(1); }
}

/* ═══════════════════════════════════════════════════════
   ◆ 新增：篇末导航（上一篇 / 下一篇）
═══════════════════════════════════════════════════════ */
.post-nav {
  display: grid; grid-template-columns: 1fr 1fr; gap: 12px;
  margin: 4px 0 28px;
  animation: modalPartIn 0.45s var(--ease-out-expo) 0.05s forwards;
  opacity: 0;
}
.post-nav-btn {
  font-family: var(--font-sans);
  display: flex; flex-direction: column; gap: 6px;
  text-align: left;
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 12px 14px;
  cursor: pointer;
  transition: all var(--t) var(--ease);
  min-width: 0;
}
.post-nav-btn.next { text-align: right; align-items: flex-end; }
.post-nav-btn.empty { visibility: hidden; }
.post-nav-btn:hover {
  border-color: var(--accent-border);
  background: var(--bg-elevated);
  transform: translateY(-2px);
  box-shadow: var(--shadow-sm);
}
.post-nav-label {
  font-size: 11px; color: var(--accent);
  font-family: var(--font-mono);
  letter-spacing: 0.04em;
  white-space: nowrap;
}
.post-nav-title {
  font-size: 13px; font-weight: 600; color: var(--text-1);
  line-height: 1.4;
  overflow: hidden; text-overflow: ellipsis;
  display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical;
}

/* ═══════════════════════════════════════════════════════
   ◆ 新增：相关阅读
═══════════════════════════════════════════════════════ */
.post-related {
  margin-bottom: 28px;
  animation: modalPartIn 0.45s var(--ease-out-expo) 0.10s forwards;
  opacity: 0;
}
.post-section-title {
  font-family: var(--font-mono);
  font-size: 12px; font-weight: 600;
  color: var(--text-2);
  letter-spacing: 0.05em;
  margin-bottom: 12px;
  display: flex; align-items: center; gap: 6px;
}
.comments-count { color: var(--text-3); font-weight: 400; }
.related-list { display: flex; flex-direction: column; gap: 8px; }
.related-item {
  font-family: var(--font-sans);
  display: flex; align-items: flex-start; gap: 8px;
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 11px 14px;
  cursor: pointer;
  text-align: left;
  color: var(--accent);
  transition: all var(--t) var(--ease);
  min-width: 0;
}
.related-item:hover {
  border-color: var(--accent-border);
  background: var(--bg-elevated);
  transform: translateX(3px);
}
.related-item svg { flex-shrink: 0; margin-top: 3px; }
.related-body { display: flex; flex-direction: column; gap: 3px; min-width: 0; }
.related-item-title {
  font-size: 13px; font-weight: 600; color: var(--text-1); line-height: 1.4;
  overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
}
.related-item-meta { font-size: 11px; color: var(--text-3); font-family: var(--font-mono); }

/* ═══════════════════════════════════════════════════════
   ◆ 新增：评论区
═══════════════════════════════════════════════════════ */
.post-comments {
  padding-top: 20px;
  border-top: 1px dashed var(--border);
  animation: modalPartIn 0.45s var(--ease-out-expo) 0.15s forwards;
  opacity: 0;
}
.comments-loading, .comments-empty, .comments-closed {
  font-size: 12px; color: var(--text-3);
  padding: 18px 0 6px;
  text-align: center;
}
.comments-closed { letter-spacing: 0.05em; }

/* 表单 */
.comment-form {
  display: flex; flex-direction: column; gap: 10px;
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 14px;
  margin-bottom: 22px;
}
.comment-form-row { display: grid; grid-template-columns: 1fr 1.6fr; gap: 10px; }
.comment-input, .comment-textarea {
  font-family: var(--font-sans);
  font-size: 13px;
  color: var(--text-1);
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 9px 12px;
  outline: none;
  transition: border-color var(--t-fast) var(--ease), box-shadow var(--t-fast) var(--ease);
  width: 100%;
}
.comment-input::placeholder, .comment-textarea::placeholder { color: var(--text-3); }
.comment-input:focus, .comment-textarea:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-glow);
}
.comment-textarea {
  resize: vertical; min-height: 74px; max-height: 260px;
  line-height: 1.6;
}
.comment-form-actions {
  display: flex; align-items: center; justify-content: space-between; gap: 10px;
}
.comment-reply-hint {
  font-size: 12px; color: var(--accent);
  background: var(--accent-glow);
  border-radius: 6px;
  padding: 4px 8px;
  display: inline-flex; align-items: center; gap: 5px;
  min-width: 0;
}
.comment-reply-cancel {
  font-family: var(--font-sans);
  background: none; border: none;
  color: var(--text-2);
  cursor: pointer; font-size: 14px; line-height: 1;
  padding: 0 2px;
}
.comment-reply-cancel:hover { color: var(--text-1); }
.comment-submit-btn {
  font-family: var(--font-sans);
  font-size: 12px; font-weight: 600;
  color: #fff;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  border: none; border-radius: 8px;
  padding: 9px 18px;
  cursor: pointer;
  display: inline-flex; align-items: center; gap: 6px;
  transition: all var(--t) var(--ease);
  flex-shrink: 0;
}
.comment-submit-btn:hover:not(:disabled) {
  transform: translateY(-1px);
  box-shadow: 0 4px 16px var(--accent-glow-strong);
}
.comment-submit-btn:disabled { opacity: 0.6; cursor: not-allowed; }
.comment-submit-btn.loading svg { animation: commentSpin 0.8s linear infinite; }
@keyframes commentSpin { to { transform: rotate(360deg); } }

/* 评论列表 */
.comments-list { display: flex; flex-direction: column; gap: 14px; }
.comment-item {
  display: flex; gap: 10px;
  animation: modalPartIn 0.4s var(--ease-out-expo) forwards;
}
.comment-avatar {
  flex-shrink: 0;
  width: 34px; height: 34px;
  border-radius: 10px;
  color: #fff;
  font-size: 14px; font-weight: 700;
  display: flex; align-items: center; justify-content: center;
  user-select: none;
}
.comment-main {
  flex: 1; min-width: 0;
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: 10px;
  padding: 10px 13px;
  transition: border-color var(--t) var(--ease);
}
.comment-item:hover .comment-main { border-color: var(--border); }
.comment-head {
  display: flex; align-items: center; gap: 8px;
  flex-wrap: wrap;
  margin-bottom: 5px;
}
.comment-nickname { font-size: 12.5px; font-weight: 600; color: var(--text-1); }
.comment-reply-to { font-size: 11px; color: var(--accent); font-family: var(--font-mono); }
.comment-time { font-size: 11px; color: var(--text-3); font-family: var(--font-mono); }
.comment-reply-btn {
  font-family: var(--font-sans);
  font-size: 11px; color: var(--text-3);
  background: none; border: none;
  cursor: pointer; padding: 0 2px;
  margin-left: auto;
  opacity: 0;
  transition: all var(--t-fast) var(--ease);
}
.comment-item:hover .comment-reply-btn,
.comment-reply-btn:focus-visible { opacity: 1; }
.comment-reply-btn:hover { color: var(--accent); }
.comment-content {
  font-size: 13px; color: var(--text-1);
  line-height: 1.7;
  word-break: break-word;
  white-space: pre-wrap;
}
.comment-children {
  display: flex; flex-direction: column; gap: 10px;
  margin: 10px 0 0 14px;
  padding-left: 14px;
  border-left: 2px solid var(--border-subtle);
}
.comment-children .comment-avatar { width: 26px; height: 26px; font-size: 11px; border-radius: 8px; }
.comment-children .comment-main { padding: 8px 11px; }

/* ═══════════════════════════════════════════════════════
   ◆ 新增：热门文章（侧边栏）
═══════════════════════════════════════════════════════ */
.hot-posts { display: flex; flex-direction: column; gap: 6px; }
.hot-post-item {
  font-family: var(--font-sans);
  display: flex; align-items: center; gap: 10px;
  background: none; border: none;
  padding: 8px 8px;
  border-radius: 8px;
  cursor: pointer;
  text-align: left;
  min-width: 0;
  transition: background var(--t) var(--ease);
}
.hot-post-item:hover { background: var(--bg-elevated); }
.hot-rank {
  flex-shrink: 0;
  width: 20px; height: 20px;
  border-radius: 6px;
  font-family: var(--font-mono);
  font-size: 11px; font-weight: 700;
  display: flex; align-items: center; justify-content: center;
  color: var(--text-3);
  background: var(--bg-elevated);
}
.hot-rank.rank-1 { color: #fff; background: linear-gradient(135deg, #ff7eb3, #ff5071); }
.hot-rank.rank-2 { color: #fff; background: linear-gradient(135deg, #ffa657, #ff8c42); }
.hot-rank.rank-3 { color: #fff; background: linear-gradient(135deg, #58a6ff, #1e90ff); }
.hot-title {
  flex: 1; min-width: 0;
  font-size: 12.5px; color: var(--text-1);
  line-height: 1.4;
  overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
  transition: color var(--t) var(--ease);
}
.hot-post-item:hover .hot-title { color: var(--accent); }
.hot-views {
  flex-shrink: 0;
  font-family: var(--font-mono);
  font-size: 10.5px; color: var(--text-3);
}

/* ◆ 新增：移动端适配（评论区表单 / 篇末导航） */
@media (max-width: 640px) {
  .comment-form-row { grid-template-columns: 1fr; }
  .post-nav { grid-template-columns: 1fr; }
  .post-nav-btn.empty { display: none; }
  .comment-children { margin-left: 8px; padding-left: 10px; }
}

/* ═══════════════════════════════════════════════════════
   ◆ 重构：文章详情页（post.html）—— 杂志感阅读布局
══════════════════════════════════════════════════════ */
.post-layout {
  padding-top: 28px;
  padding-bottom: 100px;
  align-items: start;
}

.post-col {
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 24px;
}

/* 文章卡片：去掉弹窗感，做成页面原生阅读区 */
.post-article {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: 20px;
  overflow: hidden;
  box-shadow: var(--shadow);
  /* 覆盖 .modal 基类的弹窗定位/尺寸/入场位移 */
  transform: none;
  margin: 0;
  max-width: none;
  animation: articleFadeIn 0.6s var(--ease-out-expo) both;
}
@keyframes articleFadeIn {
  from { opacity: 0; transform: translateY(16px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* 顶部装饰色条（默认渐变，加载后由 JS 按分类写入） */
.post-article .modal-top-stripe {
  height: 4px;
  background: var(--gradient-aurora);
}

/* 返回列表：弱化成文字链，放在 hero 顶部 */
.post-back {
  display: inline-flex;
  align-items: center;
  align-self: flex-start;
  gap: 6px;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--text-3);
  text-decoration: none;
  transition: color var(--t) var(--ease), transform var(--t) var(--ease);
}
.post-back svg { transition: transform var(--t) var(--ease); }
.post-back:hover {
  color: var(--accent);
  transform: translateX(-2px);
}
.post-back:hover svg { transform: translateX(-3px); }

/* 文章头：杂志 hero */
.post-article .modal-header {
  padding: 30px 48px 28px;
  border-bottom: 1px solid var(--border-subtle);
  text-align: left;
}

.post-article .modal-meta {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
  margin-bottom: 18px;
  font-size: 12.5px;
}
.post-article .modal-meta .post-dot {
  width: 3px; height: 3px;
  border-radius: 50%;
  background: var(--border);
  flex-shrink: 0;
}

.post-article .modal-title {
  font-size: clamp(26px, 4vw, 38px);
  font-weight: 700;
  line-height: 1.25;
  letter-spacing: -0.03em;
  color: var(--text-1);
  margin-bottom: 14px;
}

.post-article .modal-desc {
  font-size: 16px;
  line-height: 1.75;
  color: var(--text-2);
  max-width: 720px;
}

.post-article .modal-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 18px;
}
.post-article .modal-tag {
  font-size: 12px;
  padding: 4px 11px;
  border-radius: 20px;
  background: var(--tag-bg);
  color: var(--tag-text);
}

/* 正文排版：更宽敞、更适合长文阅读 */
.post-article .modal-body {
  padding: 36px 48px 44px;
  font-size: 15.5px;
  line-height: 1.92;
  color: var(--text-2);
}

.post-article .modal-body-content {
  max-width: 720px;
  margin: 0 auto;
}

.post-article .modal-body p {
  margin: 0 0 22px;
}
.post-article .modal-body p:last-child { margin-bottom: 0; }

.post-article .modal-body h1,
.post-article .modal-body h2,
.post-article .modal-body h3,
.post-article .modal-body h4 {
  color: var(--text-1);
  font-weight: 600;
  margin-top: 42px;
  margin-bottom: 16px;
  line-height: 1.3;
  letter-spacing: -0.02em;
}
.post-article .modal-body h2 { font-size: 24px; }
.post-article .modal-body h3 { font-size: 20px; }
.post-article .modal-body h4 { font-size: 17px; }
.post-article .modal-body h2 + p,
.post-article .modal-body h3 + p,
.post-article .modal-body h4 + p { margin-top: 0; }

.post-article .modal-body img {
  max-width: 100%;
  height: auto;
  border-radius: 12px;
  display: block;
  margin: 28px auto;
  border: 1px solid var(--border-subtle);
}

.post-article .modal-body blockquote {
  margin: 28px 0;
  padding: 18px 24px;
  border-left: 3px solid var(--accent);
  background: var(--accent-glow);
  border-radius: 0 12px 12px 0;
  font-size: 15px;
}

.post-article .modal-body ul,
.post-article .modal-body ol {
  margin: 18px 0 24px;
  padding-left: 28px;
  line-height: 1.85;
}
.post-article .modal-body li { margin-bottom: 8px; }

/* 底部操作栏 */
.post-article .modal-footer {
  padding: 20px 48px;
  border-top: 1px solid var(--border-subtle);
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  background: var(--bg-deep);
}
.post-article .modal-read-btn { margin-right: auto; }
.post-article .modal-like-btn,
.post-article .modal-share-btn {
  background: var(--bg-surface);
}

/* 上一篇 / 下一篇：与正文同宽居中 */
.post-nav {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
  max-width: 720px;
  margin: 36px auto 0;
  animation: articleFadeIn 0.5s var(--ease-out-expo) 0.05s both;
}

/* 评论区：从 card 改为开放区块 */
.post-comments-card {
  background: transparent;
  border: none;
  box-shadow: none;
  padding: 0;
  /* 覆盖 .modal 基类的弹窗定位/尺寸/入场位移 */
  transform: none;
  margin: 0;
  max-width: none;
  animation: articleFadeIn 0.5s var(--ease-out-expo) 0.08s both;
}
.post-comments-card .post-comments {
  padding: 0;
  border: none;
  animation: none;
  opacity: 1; /* 取消入场动画后必须显式置 1，否则继承基类 opacity:0 会隐形 */
}
.post-comments-card .post-section-title {
  font-size: 14px;
  color: var(--text-1);
  margin-bottom: 18px;
}
.post-comments-card .comment-form {
  background: var(--bg-surface);
  border-radius: 16px;
  padding: 18px;
}

/* 加载失败时的返回链接 */
.modal-loading .post-back { margin-bottom: 0; }

/* 侧边栏：详情页 widget 直接可见 */
.post-aside .sidebar-widget {
  opacity: 1;
  transform: none;
  border-radius: 16px;
}
.post-aside .related-item { width: 100%; box-sizing: border-box; }

/* ═══════════════════════════════════════════════════════
   ◆ 新增：文章目录（TOC）
══════════════════════════════════════════════════════ */
.post-toc {
  display: flex;
  flex-direction: column;
  gap: 2px;
  max-height: 420px;
  overflow-y: auto;
  padding-right: 4px;
}
.toc-empty {
  font-size: 12px;
  color: var(--text-3);
  padding: 8px 0;
  text-align: center;
}
.toc-link {
  display: block;
  padding: 7px 10px;
  border-radius: 8px;
  font-size: 12.5px;
  color: var(--text-2);
  text-decoration: none;
  line-height: 1.45;
  transition: all var(--t-fast) var(--ease);
  border-left: 2px solid transparent;
}
.toc-link:hover {
  color: var(--accent);
  background: var(--bg-elevated);
}
.toc-link.active {
  color: var(--accent);
  background: var(--accent-glow);
  border-left-color: var(--accent);
  font-weight: 500;
}
.toc-link.level-3 {
  padding-left: 22px;
  font-size: 12px;
  color: var(--text-3);
}
.toc-link.level-3.active { color: var(--accent); }

/* 隐藏无目录时的 TOC widget */
#tocWidget.hidden { display: none; }

/* ── 移动端适配 ── */
@media (max-width: 900px) {
  .post-layout { grid-template-columns: 1fr; }
  .post-aside { position: static; }
  /* 侧边栏移到文章下方，目录在窄屏意义不大，直接隐藏 */
  #tocWidget { display: none; }
}

@media (max-width: 640px) {
  .post-layout { padding-top: 16px; padding-bottom: 60px; }

  .post-article { border-radius: 14px; }
  .post-article .modal-header { padding: 22px 20px 18px; }
  .post-article .modal-meta { margin-bottom: 14px; gap: 8px; }
  .post-article .modal-title { font-size: 24px; margin-bottom: 10px; }
  .post-article .modal-desc { font-size: 14.5px; }
  .post-article .modal-tags { margin-top: 14px; }

  .post-article .modal-body {
    padding: 22px 20px 28px;
    font-size: 14.5px;
    line-height: 1.85;
  }
  .post-article .modal-body h2 { font-size: 20px; margin-top: 32px; }
  .post-article .modal-body h3 { font-size: 17px; margin-top: 26px; }
  .post-article .modal-body h4 { font-size: 15px; margin-top: 22px; }

  .post-article .modal-footer {
    padding: 14px 20px;
    gap: 8px;
  }
  .post-article .modal-footer > button {
    flex: 1 1 auto;
    justify-content: center;
  }
  .post-article .modal-read-btn { margin-right: 0; }

  .post-nav { grid-template-columns: 1fr; }
  .post-nav-btn.empty { display: none; }

  .post-comments-card { margin-top: 8px; }
  .post-comments-card .comment-form { padding: 14px; border-radius: 12px; }
}

@media (max-width: 360px) {
  .post-article .modal-footer > button { flex: 1 1 100%; }
}