/* ============================================================
   Nebula Blog · 科技风主题样式表
   深色（默认）/ 亮色 双主题，全部通过 CSS 变量切换
   ============================================================ */

/* ---------- 主题变量 ---------- */
:root,
:root[data-theme="dark"] {
  --bg:            #04060e;
  --bg-soft:       #070b16;
  --panel:         rgba(15, 23, 42, 0.62);
  --panel-solid:   #0b1220;
  --panel-hover:   rgba(23, 35, 60, 0.78);
  --border:        rgba(82, 160, 220, 0.16);
  --border-strong: rgba(90, 200, 255, 0.38);
  --text:          #e8f1ff;
  --text-2:        #9fb3d0;
  --text-3:        #66799a;
  --accent:        #22d3ee;
  --accent-2:      #7c5cff;
  --accent-3:      #2dd4bf;
  --accent-warm:   #fbbf24;
  --danger:        #f87171;
  --grid-line:     rgba(90, 170, 240, 0.055);
  --glow-1:        rgba(34, 211, 238, 0.22);
  --glow-2:        rgba(124, 92, 255, 0.20);
  --shadow:        0 18px 50px -22px rgba(0, 0, 0, 0.85);
  --shadow-sm:     0 8px 24px -14px rgba(0, 0, 0, 0.8);
  --code-bg:       #080e1c;
  --code-head:     rgba(20, 32, 54, 0.9);
  --scroll-thumb:  #22334f;
  color-scheme: dark;
}

:root[data-theme="light"] {
  --bg:            #f4f7fc;
  --bg-soft:       #eaf0f9;
  --panel:         rgba(255, 255, 255, 0.82);
  --panel-solid:   #ffffff;
  --panel-hover:   rgba(255, 255, 255, 0.95);
  --border:        rgba(30, 90, 150, 0.14);
  --border-strong: rgba(20, 130, 190, 0.4);
  --text:          #10203a;
  --text-2:        #4a5f7d;
  --text-3:        #7f92ab;
  --accent:        #0891b2;
  --accent-2:      #6d4aff;
  --accent-3:      #0d9488;
  --accent-warm:   #d97706;
  --danger:        #dc2626;
  --grid-line:     rgba(40, 110, 180, 0.07);
  --glow-1:        rgba(8, 145, 178, 0.14);
  --glow-2:        rgba(109, 74, 255, 0.12);
  --shadow:        0 18px 44px -24px rgba(20, 50, 90, 0.28);
  --shadow-sm:     0 8px 22px -16px rgba(20, 50, 90, 0.3);
  --code-bg:       #0f172a;
  --code-head:     rgba(30, 41, 59, 0.95);
  --scroll-thumb:  #b9c8dc;
  color-scheme: light;
}

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

html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  min-height: 100vh;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
               "Hiragino Sans GB", "Microsoft YaHei", "Source Han Sans SC", sans-serif;
  font-size: 15.5px;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

/* 背景：网格 + 双色光晕 */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -2;
  background-image:
    linear-gradient(var(--grid-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid-line) 1px, transparent 1px);
  background-size: 52px 52px;
  mask-image: radial-gradient(ellipse 120% 90% at 50% 0%, #000 35%, transparent 78%);
  -webkit-mask-image: radial-gradient(ellipse 120% 90% at 50% 0%, #000 35%, transparent 78%);
  pointer-events: none;
}
body::after {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -3;
  background:
    radial-gradient(700px 420px at 12% -6%, var(--glow-1), transparent 62%),
    radial-gradient(760px 460px at 88% 4%, var(--glow-2), transparent 64%),
    radial-gradient(900px 600px at 50% 108%, var(--glow-1), transparent 70%);
  pointer-events: none;
}

a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
button { font: inherit; cursor: pointer; }
input, textarea, select { font: inherit; }

::selection { background: var(--accent); color: #04121a; }

::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb {
  background: var(--scroll-thumb);
  border-radius: 99px;
  border: 2px solid transparent;
  background-clip: content-box;
}
::-webkit-scrollbar-thumb:hover { background: var(--accent); background-clip: content-box; }

.wrap { width: min(1180px, calc(100% - 40px)); margin: 0 auto; }
.wrap-narrow { width: min(900px, calc(100% - 40px)); margin: 0 auto; }

/* ---------- 顶部导航 ---------- */
.topbar {
  position: sticky;
  top: 0;
  z-index: 60;
  backdrop-filter: blur(18px) saturate(1.4);
  -webkit-backdrop-filter: blur(18px) saturate(1.4);
  background: color-mix(in srgb, var(--bg) 76%, transparent);
  border-bottom: 1px solid var(--border);
}
.topbar::after {
  content: "";
  position: absolute;
  left: 0; right: 0; bottom: -1px;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--accent), var(--accent-2), transparent);
  opacity: 0.55;
}
.topbar-inner {
  display: flex;
  align-items: center;
  gap: 26px;
  height: 66px;
}
.brand {
  display: flex;
  align-items: center;
  gap: 11px;
  font-weight: 700;
  font-size: 17px;
  letter-spacing: 0.3px;
  white-space: nowrap;
}
.brand-mark {
  width: 34px; height: 34px;
  display: grid; place-items: center;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  box-shadow: 0 0 18px -3px var(--accent);
  color: #04121a;
  flex: none;
}
.brand-mark svg { width: 19px; height: 19px; }
.brand-text { display: flex; flex-direction: column; line-height: 1.15; }
.brand-text small {
  font-size: 10.5px;
  font-weight: 500;
  color: var(--text-3);
  letter-spacing: 1.4px;
  text-transform: uppercase;
}

.mainnav { display: flex; gap: 4px; margin-left: auto; }
.mainnav a {
  position: relative;
  padding: 7px 13px;
  border-radius: 9px;
  font-size: 14px;
  color: var(--text-2);
  transition: color .18s, background .18s;
  white-space: nowrap;
}
.mainnav a:hover { color: var(--text); background: var(--panel); }
.mainnav a.on { color: var(--accent); background: color-mix(in srgb, var(--accent) 11%, transparent); }
.mainnav a.on::after {
  content: "";
  position: absolute;
  left: 50%; bottom: 1px;
  transform: translateX(-50%);
  width: 16px; height: 2px;
  border-radius: 2px;
  background: var(--accent);
  box-shadow: 0 0 8px var(--accent);
}

.topbar-tools { display: flex; align-items: center; gap: 8px; }
.icon-btn {
  width: 36px; height: 36px;
  display: grid; place-items: center;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: var(--panel);
  color: var(--text-2);
  transition: all .18s;
}
.icon-btn:hover { color: var(--accent); border-color: var(--border-strong); transform: translateY(-1px); }
.icon-btn svg { width: 17px; height: 17px; }

.nav-toggle { display: none; }

/* 搜索面板 */
.search-panel {
  display: none;
  padding: 14px 0 18px;
  border-top: 1px solid var(--border);
}
.search-panel.open { display: block; animation: slideDown .22s ease; }
@keyframes slideDown { from { opacity: 0; transform: translateY(-6px); } to { opacity: 1; transform: none; } }
.search-form { display: flex; gap: 10px; }

/* ---------- 通用控件 ---------- */
.input, .select, .textarea {
  width: 100%;
  padding: 11px 15px;
  border-radius: 11px;
  border: 1px solid var(--border);
  background: var(--panel);
  color: var(--text);
  transition: border-color .18s, box-shadow .18s;
  outline: none;
}
.input::placeholder, .textarea::placeholder { color: var(--text-3); }
.input:focus, .select:focus, .textarea:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--accent) 16%, transparent);
}
.select { appearance: none; background-image: none; cursor: pointer; }

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 7px;
  padding: 10px 18px;
  border-radius: 11px;
  border: 1px solid var(--border);
  background: var(--panel);
  color: var(--text);
  font-size: 14px;
  font-weight: 500;
  transition: all .18s;
  white-space: nowrap;
}
.btn:hover { border-color: var(--border-strong); transform: translateY(-1px); box-shadow: var(--shadow-sm); }
.btn svg { width: 16px; height: 16px; }
.btn-primary {
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  border-color: transparent;
  color: #04121a;
  font-weight: 600;
  box-shadow: 0 8px 24px -12px var(--accent);
}
.btn-primary:hover { box-shadow: 0 12px 30px -10px var(--accent); }
.btn-ghost { background: transparent; }
.btn-sm { padding: 6px 12px; font-size: 13px; border-radius: 9px; }
.btn-danger { color: var(--danger); border-color: color-mix(in srgb, var(--danger) 34%, transparent); }
.btn-danger:hover { background: color-mix(in srgb, var(--danger) 12%, transparent); }

.tag-chip {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 3px 10px;
  border-radius: 99px;
  font-size: 12.5px;
  color: var(--text-2);
  background: color-mix(in srgb, var(--accent) 9%, transparent);
  border: 1px solid color-mix(in srgb, var(--accent) 22%, transparent);
  transition: all .16s;
}
.tag-chip:hover {
  color: var(--accent);
  border-color: var(--accent);
  transform: translateY(-1px);
}

/* ---------- 首页 Hero ---------- */
.hero {
  position: relative;
  padding: 76px 0 60px;
  overflow: hidden;
}
.hero-grid {
  position: absolute;
  inset: 0;
  z-index: -1;
  background-image:
    linear-gradient(var(--grid-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid-line) 1px, transparent 1px);
  background-size: 44px 44px;
  mask-image: radial-gradient(ellipse 70% 80% at 50% 40%, #000 20%, transparent 72%);
  -webkit-mask-image: radial-gradient(ellipse 70% 80% at 50% 40%, #000 20%, transparent 72%);
  animation: gridDrift 26s linear infinite;
}
@keyframes gridDrift { to { background-position: 44px 44px, 44px 44px; } }

.hero-orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(70px);
  opacity: 0.5;
  z-index: -1;
  animation: float 13s ease-in-out infinite;
}
.hero-orb.a { width: 320px; height: 320px; background: var(--accent); top: -70px; left: -50px; }
.hero-orb.b { width: 280px; height: 280px; background: var(--accent-2); top: 30px; right: -40px; animation-delay: -6s; }
@keyframes float {
  0%, 100% { transform: translate(0, 0) scale(1); }
  50% { transform: translate(24px, -26px) scale(1.09); }
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  padding: 6px 15px;
  border-radius: 99px;
  border: 1px solid var(--border-strong);
  background: var(--panel);
  font-size: 12.5px;
  color: var(--text-2);
  letter-spacing: 0.4px;
  margin-bottom: 22px;
}
.pulse-dot {
  width: 7px; height: 7px;
  border-radius: 50%;
  background: var(--accent-3);
  box-shadow: 0 0 0 0 var(--accent-3);
  animation: pulse 2.1s infinite;
}
@keyframes pulse {
  0% { box-shadow: 0 0 0 0 color-mix(in srgb, var(--accent-3) 70%, transparent); }
  70% { box-shadow: 0 0 0 9px transparent; }
  100% { box-shadow: 0 0 0 0 transparent; }
}

.hero h1 {
  margin: 0 0 18px;
  font-size: clamp(34px, 5.6vw, 60px);
  line-height: 1.16;
  font-weight: 800;
  letter-spacing: -0.8px;
}
.grad-text {
  background: linear-gradient(100deg, var(--accent) 0%, var(--accent-2) 48%, var(--accent-3) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  background-size: 220% auto;
  animation: gradShift 7s ease infinite;
}
@keyframes gradShift {
  0%, 100% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
}
.hero p.lead {
  max-width: 620px;
  font-size: 16.5px;
  color: var(--text-2);
  margin: 0 0 30px;
}
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-bottom: 46px; }

.hero-stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 14px;
  max-width: 780px;
}
.stat-card {
  padding: 16px 18px;
  border-radius: 14px;
  border: 1px solid var(--border);
  background: var(--panel);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  transition: all .22s;
}
.stat-card:hover { border-color: var(--border-strong); transform: translateY(-3px); box-shadow: var(--shadow-sm); }
.stat-num {
  font-size: 26px;
  font-weight: 800;
  font-variant-numeric: tabular-nums;
  font-family: "JetBrains Mono", "Cascadia Code", Consolas, monospace;
  background: linear-gradient(120deg, var(--accent), var(--accent-2));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  line-height: 1.25;
}
.stat-label { font-size: 12.5px; color: var(--text-3); letter-spacing: 0.5px; }

/* ---------- 区块标题 ---------- */
.section { padding: 46px 0; }
.section-head {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 18px;
  margin-bottom: 26px;
}
.section-title {
  position: relative;
  margin: 0;
  padding-left: 15px;
  font-size: 22px;
  font-weight: 700;
  letter-spacing: -0.2px;
}
.section-title::before {
  content: "";
  position: absolute;
  left: 0; top: 50%;
  transform: translateY(-50%);
  width: 4px; height: 21px;
  border-radius: 3px;
  background: linear-gradient(180deg, var(--accent), var(--accent-2));
  box-shadow: 0 0 12px -1px var(--accent);
}
.section-title small {
  display: block;
  font-size: 12.5px;
  font-weight: 400;
  color: var(--text-3);
  letter-spacing: 0.6px;
  margin-top: 3px;
}
.section-more { font-size: 13.5px; color: var(--text-2); display: inline-flex; align-items: center; gap: 5px; transition: color .18s; }
.section-more:hover { color: var(--accent); }

/* ---------- 卡片通用 ---------- */
.card {
  position: relative;
  border-radius: 16px;
  border: 1px solid var(--border);
  background: var(--panel);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  transition: all .24s cubic-bezier(.2,.7,.3,1);
  overflow: hidden;
}
.card::before {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
  padding: 1px;
  background: linear-gradient(135deg, var(--accent), transparent 42%, transparent 58%, var(--accent-2));
  -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  -webkit-mask-composite: xor;
  mask-composite: exclude;
  opacity: 0;
  transition: opacity .24s;
  pointer-events: none;
}
.card:hover { transform: translateY(-4px); box-shadow: var(--shadow); }
.card:hover::before { opacity: 1; }

/* ---------- 文章卡片 ---------- */
.post-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 20px;
}
.post-card { display: flex; flex-direction: column; padding: 22px; }
.post-card-top { display: flex; align-items: center; gap: 9px; margin-bottom: 13px; flex-wrap: wrap; }
.cat-pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 3px 11px;
  border-radius: 99px;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.2px;
  border: 1px solid currentColor;
  opacity: 0.92;
}
.cat-pill .dot { width: 6px; height: 6px; border-radius: 50%; background: currentColor; box-shadow: 0 0 7px currentColor; }
.pin-badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 3px 9px;
  border-radius: 99px;
  font-size: 11.5px;
  font-weight: 600;
  color: var(--accent-warm);
  background: color-mix(in srgb, var(--accent-warm) 13%, transparent);
  border: 1px solid color-mix(in srgb, var(--accent-warm) 32%, transparent);
}
.post-card h3 {
  margin: 0 0 10px;
  font-size: 17.5px;
  font-weight: 700;
  line-height: 1.45;
  transition: color .18s;
}
.post-card:hover h3 { color: var(--accent); }
.post-card .excerpt {
  margin: 0 0 16px;
  font-size: 14px;
  color: var(--text-2);
  line-height: 1.72;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.post-card .meta {
  display: flex;
  align-items: center;
  gap: 14px;
  flex-wrap: wrap;
  margin-top: auto;
  padding-top: 14px;
  border-top: 1px dashed var(--border);
  font-size: 12.5px;
  color: var(--text-3);
}
.meta-item { display: inline-flex; align-items: center; gap: 5px; }
.meta-item svg { width: 13px; height: 13px; opacity: 0.8; }

/* 横向列表卡片（首页置顶 / 归档） */
.post-row {
  display: flex;
  align-items: center;
  gap: 20px;
  padding: 18px 22px;
  border-radius: 14px;
  border: 1px solid var(--border);
  background: var(--panel);
  transition: all .2s;
}
.post-row:hover { border-color: var(--border-strong); transform: translateX(4px); }
.post-row .idx {
  font-family: "JetBrains Mono", Consolas, monospace;
  font-size: 22px;
  font-weight: 800;
  color: transparent;
  -webkit-text-stroke: 1px var(--border-strong);
  flex: none;
  width: 42px;
}
.post-row h4 { margin: 0 0 6px; font-size: 16px; font-weight: 650; }
.post-row:hover h4 { color: var(--accent); }
.post-row .sub { font-size: 12.5px; color: var(--text-3); display: flex; gap: 13px; flex-wrap: wrap; }
.post-row .date-badge {
  margin-left: auto;
  flex: none;
  font-family: "JetBrains Mono", Consolas, monospace;
  font-size: 12.5px;
  color: var(--text-3);
  padding: 4px 11px;
  border-radius: 8px;
  border: 1px solid var(--border);
}

/* ---------- 附件卡片 ---------- */
.dl-card {
  display: flex;
  align-items: center;
  gap: 15px;
  padding: 16px 18px;
  border-radius: 14px;
  border: 1px solid var(--border);
  background: var(--panel);
  transition: all .22s;
}
.dl-card:hover { border-color: var(--border-strong); transform: translateY(-3px); box-shadow: var(--shadow-sm); }
.file-icon {
  width: 46px; height: 46px;
  flex: none;
  display: grid; place-items: center;
  border-radius: 12px;
  font-family: "JetBrains Mono", Consolas, monospace;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.5px;
  color: #04121a;
  background: linear-gradient(135deg, var(--accent), var(--accent-3));
  box-shadow: 0 0 16px -6px var(--accent);
}
.file-icon.f-pdf { background: linear-gradient(135deg, #f87171, #fb923c); box-shadow: 0 0 16px -6px #f87171; }
.file-icon.f-zip, .file-icon.f-rar, .file-icon.f-7z { background: linear-gradient(135deg, #fbbf24, #f59e0b); box-shadow: 0 0 16px -6px #fbbf24; }
.file-icon.f-xlsx, .file-icon.f-xls, .file-icon.f-csv { background: linear-gradient(135deg, #34d399, #10b981); box-shadow: 0 0 16px -6px #34d399; }
.file-icon.f-docx, .file-icon.f-doc { background: linear-gradient(135deg, #60a5fa, #3b82f6); box-shadow: 0 0 16px -6px #60a5fa; }
.file-icon.f-pptx, .file-icon.f-ppt { background: linear-gradient(135deg, #fb923c, #f97316); box-shadow: 0 0 16px -6px #fb923c; }
.file-icon.f-md, .file-icon.f-txt, .file-icon.f-json, .file-icon.f-py, .file-icon.f-js, .file-icon.f-sh { background: linear-gradient(135deg, #a78bfa, #7c5cff); box-shadow: 0 0 16px -6px #a78bfa; }
.file-icon.f-png, .file-icon.f-jpg, .file-icon.f-jpeg, .file-icon.f-webp, .file-icon.f-svg, .file-icon.f-gif { background: linear-gradient(135deg, #22d3ee, #06b6d4); }

.dl-body { min-width: 0; flex: 1; }
.dl-title {
  font-size: 14.5px;
  font-weight: 600;
  margin: 0 0 4px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.dl-desc {
  font-size: 12.5px;
  color: var(--text-3);
  margin: 0 0 5px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.dl-meta { font-size: 11.5px; color: var(--text-3); display: flex; gap: 12px; flex-wrap: wrap; font-family: "JetBrains Mono", Consolas, monospace; }
.dl-action { flex: none; }

/* 文章内嵌下载卡片 */
.download-inline {
  margin: 22px 0;
  padding: 16px 18px;
  border-radius: 14px;
  border: 1px dashed var(--border-strong);
  background: color-mix(in srgb, var(--accent) 6%, transparent);
  display: flex;
  align-items: center;
  gap: 15px;
}

/* ---------- 文章详情 ---------- */
.post-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 268px;
  gap: 42px;
  align-items: start;
  padding: 40px 0 60px;
}
.post-header { margin-bottom: 30px; }
.post-header h1 {
  margin: 14px 0 16px;
  font-size: clamp(26px, 3.6vw, 38px);
  line-height: 1.28;
  font-weight: 800;
  letter-spacing: -0.5px;
}
.post-header .post-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  padding-top: 16px;
  border-top: 1px solid var(--border);
  font-size: 13px;
  color: var(--text-3);
}

.reading-bar {
  position: fixed;
  top: 0; left: 0;
  height: 2.5px;
  width: 0;
  z-index: 200;
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  box-shadow: 0 0 10px var(--accent);
  transition: width .1s linear;
}

/* Markdown 正文排版 */
.md-body { font-size: 16px; line-height: 1.92; color: var(--text); }
.md-body > *:first-child { margin-top: 0; }
.md-body h2, .md-body h3, .md-body h4 {
  position: relative;
  margin: 2.1em 0 0.85em;
  font-weight: 700;
  line-height: 1.4;
  scroll-margin-top: 90px;
}
.md-body h2 { font-size: 23px; padding-bottom: 11px; border-bottom: 1px solid var(--border); }
.md-body h2::after {
  content: "";
  position: absolute;
  left: 0; bottom: -1px;
  width: 54px; height: 2px;
  border-radius: 2px;
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
}
.md-body h3 { font-size: 19.5px; }
.md-body h4 { font-size: 17px; color: var(--text-2); }
.md-body .md-anchor {
  position: absolute;
  left: -22px;
  color: var(--accent);
  opacity: 0;
  font-weight: 400;
  transition: opacity .18s;
  text-decoration: none;
}
.md-body h2:hover .md-anchor, .md-body h3:hover .md-anchor, .md-body h4:hover .md-anchor { opacity: 0.6; }
.md-body p { margin: 1.05em 0; }
.md-body a {
  color: var(--accent);
  border-bottom: 1px solid color-mix(in srgb, var(--accent) 38%, transparent);
  transition: all .16s;
}
.md-body a:hover { border-bottom-color: var(--accent); background: color-mix(in srgb, var(--accent) 10%, transparent); }
.md-body strong { color: var(--text); font-weight: 700; }
.md-body ul, .md-body ol { padding-left: 1.5em; margin: 1.05em 0; }
.md-body li { margin: 0.42em 0; }
.md-body li::marker { color: var(--accent); }
.md-body blockquote {
  margin: 1.5em 0;
  padding: 14px 20px;
  border-left: 3px solid var(--accent);
  border-radius: 0 11px 11px 0;
  background: color-mix(in srgb, var(--accent) 7%, transparent);
  color: var(--text-2);
}
.md-body blockquote p:first-child { margin-top: 0; }
.md-body blockquote p:last-child { margin-bottom: 0; }
.md-body code:not(.hljs) {
  padding: 2.5px 7px;
  border-radius: 6px;
  font-family: "JetBrains Mono", "Cascadia Code", Consolas, monospace;
  font-size: 0.88em;
  color: var(--accent);
  background: color-mix(in srgb, var(--accent) 12%, transparent);
  border: 1px solid color-mix(in srgb, var(--accent) 20%, transparent);
}
.md-body img { border-radius: 12px; margin: 1.4em 0; border: 1px solid var(--border); }
.md-body hr { border: none; border-top: 1px solid var(--border); margin: 2.2em 0; }
.md-body table {
  width: 100%;
  border-collapse: collapse;
  margin: 1.5em 0;
  font-size: 14.5px;
  display: block;
  overflow-x: auto;
}
.md-body th, .md-body td {
  padding: 10px 14px;
  border: 1px solid var(--border);
  text-align: left;
}
.md-body th {
  background: color-mix(in srgb, var(--accent) 9%, transparent);
  font-weight: 650;
  white-space: nowrap;
}
.md-body tbody tr:hover { background: color-mix(in srgb, var(--accent) 5%, transparent); }

/* 代码块 */
.code-block {
  margin: 1.6em 0;
  border-radius: 13px;
  border: 1px solid var(--border);
  overflow: hidden;
  background: var(--code-bg);
}
.code-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 8px 14px;
  background: var(--code-head);
  border-bottom: 1px solid var(--border);
}
.code-lang {
  font-family: "JetBrains Mono", Consolas, monospace;
  font-size: 11.5px;
  letter-spacing: 1px;
  text-transform: uppercase;
  color: var(--text-3);
}
.code-lang::before {
  content: "";
  display: inline-block;
  width: 7px; height: 7px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 8px var(--accent);
  margin-right: 8px;
  vertical-align: middle;
}
.code-copy {
  padding: 3px 11px;
  border-radius: 7px;
  border: 1px solid var(--border);
  background: transparent;
  color: var(--text-3);
  font-size: 11.5px;
  transition: all .16s;
}
.code-copy:hover { color: var(--accent); border-color: var(--accent); }
.code-copy.done { color: var(--accent-3); border-color: var(--accent-3); }
.code-pre {
  margin: 0;
  padding: 16px 18px;
  overflow-x: auto;
  font-size: 13.5px;
  line-height: 1.75;
}
.code-pre code {
  font-family: "JetBrains Mono", "Cascadia Code", Consolas, "Courier New", monospace;
  background: none;
  padding: 0;
  border: none;
  color: #dbe6f5;
}

/* highlight.js 配色（深色终端风） */
.hljs-comment, .hljs-quote { color: #5b7290; font-style: italic; }
.hljs-keyword, .hljs-selector-tag, .hljs-literal, .hljs-doctag, .hljs-formula { color: #c792ea; }
.hljs-string, .hljs-regexp, .hljs-addition, .hljs-attribute, .hljs-meta .hljs-string { color: #7ee787; }
.hljs-number, .hljs-variable, .hljs-template-variable, .hljs-type, .hljs-selector-class, .hljs-selector-attr, .hljs-selector-pseudo { color: #ffab70; }
.hljs-title, .hljs-section, .hljs-title.class_, .hljs-title.function_ { color: #79c0ff; }
.hljs-attr, .hljs-symbol, .hljs-bullet, .hljs-link, .hljs-meta, .hljs-selector-id, .hljs-template-tag { color: #22d3ee; }
.hljs-built_in, .hljs-class .hljs-title, .hljs-params { color: #ffa657; }
.hljs-name, .hljs-tag { color: #7ee787; }
.hljs-deletion { color: #ff7b72; }
.hljs-emphasis { font-style: italic; }
.hljs-strong { font-weight: 700; }

/* ---------- 侧边栏 ---------- */
.sidebar { position: sticky; top: 88px; display: flex; flex-direction: column; gap: 20px; }
.side-box {
  padding: 18px 20px;
  border-radius: 15px;
  border: 1px solid var(--border);
  background: var(--panel);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}
.side-box h5 {
  margin: 0 0 14px;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 1.2px;
  text-transform: uppercase;
  color: var(--text-3);
  display: flex;
  align-items: center;
  gap: 8px;
}
.side-box h5::before {
  content: "";
  width: 3px; height: 13px;
  border-radius: 2px;
  background: var(--accent);
  box-shadow: 0 0 8px var(--accent);
}
.toc-list { list-style: none; margin: 0; padding: 0; max-height: 46vh; overflow-y: auto; }
.toc-list a {
  display: block;
  padding: 5px 0 5px 11px;
  border-left: 2px solid var(--border);
  font-size: 13.5px;
  color: var(--text-2);
  transition: all .16s;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.toc-list a:hover { color: var(--text); border-left-color: var(--border-strong); }
.toc-list a.active { color: var(--accent); border-left-color: var(--accent); background: color-mix(in srgb, var(--accent) 7%, transparent); }
.toc-list .lv3 a { padding-left: 22px; font-size: 13px; }
.toc-list .lv4 a { padding-left: 33px; font-size: 12.5px; }

/* ---------- 资料库 ---------- */
.lib-hero {
  padding: 46px 0 34px;
  border-bottom: 1px solid var(--border);
  margin-bottom: 34px;
}
.lib-hero h1 { margin: 0 0 12px; font-size: clamp(27px, 4vw, 38px); font-weight: 800; letter-spacing: -0.5px; }
.lib-hero p { margin: 0; color: var(--text-2); max-width: 660px; }
.lib-toolbar {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  align-items: center;
  margin-bottom: 24px;
  padding: 15px 18px;
  border-radius: 14px;
  border: 1px solid var(--border);
  background: var(--panel);
}
.filter-group { display: flex; gap: 7px; flex-wrap: wrap; align-items: center; }
.filter-label { font-size: 12.5px; color: var(--text-3); margin-right: 3px; }
.filter-btn {
  padding: 5px 13px;
  border-radius: 99px;
  border: 1px solid var(--border);
  background: transparent;
  color: var(--text-2);
  font-size: 12.5px;
  transition: all .16s;
}
.filter-btn:hover { border-color: var(--border-strong); color: var(--text); }
.filter-btn.on {
  color: var(--accent);
  border-color: var(--accent);
  background: color-mix(in srgb, var(--accent) 11%, transparent);
}
.lib-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(340px, 1fr)); gap: 16px; }
.lib-stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(130px, 1fr));
  gap: 14px;
  margin-bottom: 30px;
}

/* ---------- 分类 / 标签 ---------- */
.cat-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(268px, 1fr)); gap: 18px; }
.cat-card { padding: 22px; display: block; }
.cat-card .cat-icon {
  width: 42px; height: 42px;
  border-radius: 12px;
  display: grid; place-items: center;
  margin-bottom: 14px;
  color: #04121a;
}
.cat-card .cat-icon svg { width: 20px; height: 20px; }
.cat-card h3 { margin: 0 0 7px; font-size: 17px; font-weight: 700; }
.cat-card p { margin: 0 0 13px; font-size: 13.5px; color: var(--text-3); min-height: 21px; }
.cat-count {
  font-family: "JetBrains Mono", Consolas, monospace;
  font-size: 12.5px;
  color: var(--text-2);
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.tag-cloud { display: flex; flex-wrap: wrap; gap: 10px; }
.tag-cloud a {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 7px 15px;
  border-radius: 99px;
  border: 1px solid var(--border);
  background: var(--panel);
  font-size: 13.5px;
  color: var(--text-2);
  transition: all .2s;
}
.tag-cloud a:hover {
  color: var(--accent);
  border-color: var(--accent);
  transform: translateY(-2px);
  box-shadow: 0 8px 20px -12px var(--accent);
}
.tag-cloud a .n {
  font-family: "JetBrains Mono", Consolas, monospace;
  font-size: 11.5px;
  color: var(--text-3);
  padding: 1px 7px;
  border-radius: 99px;
  background: color-mix(in srgb, var(--accent) 11%, transparent);
}
.tag-cloud a:hover .n { color: var(--accent); }

/* ---------- 归档 ---------- */
.year-block { margin-bottom: 42px; }
.year-head {
  display: flex;
  align-items: baseline;
  gap: 13px;
  margin-bottom: 20px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--border);
}
.year-head .y {
  font-family: "JetBrains Mono", Consolas, monospace;
  font-size: 34px;
  font-weight: 800;
  background: linear-gradient(120deg, var(--accent), var(--accent-2));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  line-height: 1;
}
.year-head .c { font-size: 13px; color: var(--text-3); }
.month-block { margin-bottom: 26px; padding-left: 18px; border-left: 2px solid var(--border); }
.month-head {
  font-family: "JetBrains Mono", Consolas, monospace;
  font-size: 13px;
  color: var(--text-3);
  letter-spacing: 1px;
  margin-bottom: 11px;
}
.archive-item {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 9px 12px;
  border-radius: 9px;
  transition: all .16s;
}
.archive-item:hover { background: var(--panel); transform: translateX(3px); }
.archive-item .d {
  font-family: "JetBrains Mono", Consolas, monospace;
  font-size: 12.5px;
  color: var(--text-3);
  flex: none;
}
.archive-item .t { font-size: 14.5px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.archive-item:hover .t { color: var(--accent); }

/* ---------- 分页 ---------- */
.pager {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 7px;
  margin-top: 40px;
  flex-wrap: wrap;
}
.pager a, .pager span {
  min-width: 38px;
  height: 38px;
  padding: 0 12px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: var(--panel);
  font-size: 13.5px;
  color: var(--text-2);
  transition: all .16s;
}
.pager a:hover { border-color: var(--border-strong); color: var(--text); transform: translateY(-1px); }
.pager .cur {
  color: #04121a;
  border-color: transparent;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  font-weight: 700;
}
.pager .dis { opacity: 0.35; pointer-events: none; }
.pager .gap { border: none; background: none; color: var(--text-3); }

/* ---------- 空状态 ---------- */
.empty {
  padding: 66px 20px;
  text-align: center;
  color: var(--text-3);
  border-radius: 16px;
  border: 1px dashed var(--border);
}
.empty svg { width: 46px; height: 46px; margin-bottom: 14px; opacity: 0.4; }
.empty p { margin: 0; font-size: 14.5px; }

/* ---------- 页脚 ---------- */
.site-footer {
  margin-top: 60px;
  padding: 44px 0 34px;
  border-top: 1px solid var(--border);
  background: linear-gradient(180deg, transparent, color-mix(in srgb, var(--accent) 4%, transparent));
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.6fr 1fr 1fr;
  gap: 36px;
  margin-bottom: 30px;
}
.footer-brand p { margin: 12px 0 0; font-size: 13.5px; color: var(--text-3); max-width: 340px; line-height: 1.75; }
.footer-col h6 {
  margin: 0 0 14px;
  font-size: 12.5px;
  letter-spacing: 1.2px;
  text-transform: uppercase;
  color: var(--text-3);
}
.footer-col ul { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 9px; }
.footer-col a { font-size: 13.5px; color: var(--text-2); transition: color .16s; }
.footer-col a:hover { color: var(--accent); }
.footer-bottom {
  padding-top: 22px;
  border-top: 1px solid var(--border);
  display: flex;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
  font-size: 12.5px;
  color: var(--text-3);
}

/* ---------- 滚动进场动画 ---------- */
.reveal { opacity: 0; transform: translateY(18px); transition: opacity .6s cubic-bezier(.2,.7,.3,1), transform .6s cubic-bezier(.2,.7,.3,1); }
.reveal.in { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
  * { animation-duration: 0.01ms !important; animation-iteration-count: 1 !important; }
}

/* ---------- 返回顶部 ---------- */
.to-top {
  position: fixed;
  right: 24px; bottom: 24px;
  width: 42px; height: 42px;
  display: grid; place-items: center;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: var(--panel);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  color: var(--text-2);
  opacity: 0;
  pointer-events: none;
  transform: translateY(12px);
  transition: all .25s;
  z-index: 50;
}
.to-top.show { opacity: 1; pointer-events: auto; transform: none; }
.to-top:hover { color: var(--accent); border-color: var(--accent); }
.to-top svg { width: 18px; height: 18px; }

/* ---------- 响应式 ---------- */
@media (max-width: 1000px) {
  .post-layout { grid-template-columns: 1fr; gap: 32px; }
  .sidebar { position: static; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 760px) {
  body { font-size: 15px; }
  .wrap, .wrap-narrow { width: calc(100% - 28px); }
  .topbar-inner { height: 60px; gap: 12px; }
  .mainnav {
    position: absolute;
    top: 60px; left: 0; right: 0;
    flex-direction: column;
    gap: 2px;
    padding: 12px 14px 16px;
    background: color-mix(in srgb, var(--bg) 96%, transparent);
    backdrop-filter: blur(18px);
    -webkit-backdrop-filter: blur(18px);
    border-bottom: 1px solid var(--border);
    display: none;
  }
  .mainnav.open { display: flex; animation: slideDown .2s ease; }
  .mainnav a { padding: 11px 13px; }
  .mainnav a.on::after { display: none; }
  .nav-toggle { display: grid; margin-left: auto; }
  .topbar-tools .icon-btn.hide-sm { display: none; }
  .hero { padding: 48px 0 40px; }
  .section { padding: 34px 0; }
  .post-grid, .lib-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; gap: 26px; }
  .post-row { flex-wrap: wrap; gap: 10px; }
  .post-row .date-badge { margin-left: 0; }
  .md-body { font-size: 15.5px; }
  .to-top { right: 14px; bottom: 14px; }
}

/* ---------- 打印 ---------- */
@media print {
  .topbar, .site-footer, .sidebar, .to-top, .reading-bar { display: none !important; }
  body { background: #fff; color: #000; }
}