/* ==========================================================================
   Takethe Blog · main.css
   黑白 + 云母（Mica）视觉：半透明玻璃面 · 细边框 · 极淡噪点 · 克制动效
   ========================================================================== */

/* ------------------------------ 设计令牌 ------------------------------ */
:root {
  --font-sans: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI", "PingFang SC", "Hiragino Sans GB",
    "Microsoft YaHei", "Noto Sans SC", system-ui, sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, "Liberation Mono", monospace;

  --r-sm: 10px;
  --r-md: 14px;
  --r-lg: 20px;
  --r-xl: 28px;

  --w-page: 1120px;
  --w-narrow: 820px;
  --w-read: 700px;

  --ease: cubic-bezier(0.22, 1, 0.36, 1);
  --dur: 220ms;

  --header-h: 72px;
}

:root[data-theme="dark"] {
  color-scheme: dark;

  --bg: #08080a;
  --bg-soft: #0c0c0f;
  --fg: #f3f3f5;
  --fg-2: #b9b9c1;
  --fg-3: #8b8b95;
  --fg-4: #6a6a74;

  --line: rgba(255, 255, 255, 0.09);
  --line-strong: rgba(255, 255, 255, 0.18);

  --glass: rgba(22, 22, 27, 0.58);
  --glass-2: rgba(28, 28, 34, 0.74);
  --glass-solid: #15151a;
  --glass-border: rgba(255, 255, 255, 0.085);
  --glass-inner: rgba(255, 255, 255, 0.06);
  --glass-blur: blur(26px) saturate(150%);

  --hover: rgba(255, 255, 255, 0.06);
  --hover-2: rgba(255, 255, 255, 0.1);
  --accent: #f5f5f7;
  --accent-fg: #0a0a0c;
  --shadow: 0 34px 80px -46px rgba(0, 0, 0, 0.95);
  --shadow-hover: 0 44px 90px -40px rgba(0, 0, 0, 1);
  --media-bg: #15151a;
  --grain-opacity: 0.05;
  --code-bg: #0e0e12;
  --blob-a: rgba(255, 255, 255, 0.09);
  --blob-b: rgba(255, 255, 255, 0.05);
  --blob-c: rgba(180, 185, 210, 0.06);
}

:root[data-theme="light"] {
  color-scheme: light;

  --bg: #f2f2f4;
  --bg-soft: #eaeaeb;
  --fg: #0e0e10;
  --fg-2: #4c4c55;
  --fg-3: #6b6b74;
  --fg-4: #8a8a93;

  --line: rgba(0, 0, 0, 0.09);
  --line-strong: rgba(0, 0, 0, 0.18);

  --glass: rgba(255, 255, 255, 0.62);
  --glass-2: rgba(255, 255, 255, 0.82);
  --glass-solid: #f7f7f9;
  --glass-border: rgba(0, 0, 0, 0.08);
  --glass-inner: rgba(255, 255, 255, 0.85);
  --glass-blur: blur(24px) saturate(160%);

  --hover: rgba(0, 0, 0, 0.05);
  --hover-2: rgba(0, 0, 0, 0.09);
  --accent: #101012;
  --accent-fg: #ffffff;
  --shadow: 0 30px 70px -50px rgba(20, 20, 30, 0.5);
  --shadow-hover: 0 40px 80px -44px rgba(20, 20, 30, 0.55);
  --media-bg: #e4e4e8;
  --grain-opacity: 0.035;
  --code-bg: #ffffff;
  --blob-a: rgba(255, 255, 255, 0.9);
  --blob-b: rgba(198, 200, 214, 0.5);
  --blob-c: rgba(255, 255, 255, 0.7);
}

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

[hidden] {
  display: none !important;
}

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-h) + 24px);
}

body {
  margin: 0;
  min-height: 100vh;
  background: var(--bg);
  color: var(--fg);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  overflow-x: clip;
  -webkit-tap-highlight-color: transparent;
}

img,
svg {
  display: block;
  max-width: 100%;
}

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

button,
input,
select,
textarea {
  font: inherit;
  color: inherit;
}

h1,
h2,
h3,
h4 {
  margin: 0;
  font-weight: 650;
  letter-spacing: -0.018em;
  line-height: 1.22;
}

p {
  margin: 0;
}

ul,
ol {
  margin: 0;
  padding: 0;
  list-style: none;
}

:focus-visible {
  outline: 2px solid var(--fg);
  outline-offset: 3px;
  border-radius: 6px;
}

::selection {
  background: var(--fg);
  color: var(--bg);
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}

.skip-link {
  position: fixed;
  top: 8px;
  left: 50%;
  transform: translate(-50%, -160%);
  z-index: 200;
  padding: 10px 18px;
  border-radius: 999px;
  background: var(--accent);
  color: var(--accent-fg);
  font-size: 0.85rem;
  transition: transform var(--dur) var(--ease);
}

.skip-link:focus-visible {
  transform: translate(-50%, 0);
}

/* ------------------------------ 背景层 ------------------------------ */
.bg-stack {
  position: fixed;
  inset: 0;
  z-index: -1;
  overflow: hidden;
  pointer-events: none;
  background: var(--bg);
}

.bg-blob {
  position: absolute;
  border-radius: 50%;
  filter: blur(90px);
}

.bg-blob-a {
  top: -22vh;
  left: -12vw;
  width: 62vw;
  height: 62vw;
  background: radial-gradient(circle at 40% 40%, var(--blob-a), transparent 68%);
}

.bg-blob-b {
  bottom: -28vh;
  right: -16vw;
  width: 70vw;
  height: 70vw;
  background: radial-gradient(circle at 60% 60%, var(--blob-b), transparent 66%);
}

.bg-blob-c {
  top: 40vh;
  left: 45vw;
  width: 42vw;
  height: 42vw;
  background: radial-gradient(circle at 50% 50%, var(--blob-c), transparent 70%);
}

.bg-grid {
  position: absolute;
  inset: 0;
  background-image: linear-gradient(to right, var(--line) 1px, transparent 1px),
    linear-gradient(to bottom, var(--line) 1px, transparent 1px);
  background-size: 96px 96px;
  opacity: 0.35;
  mask-image: radial-gradient(ellipse 80% 60% at 50% 0%, #000 20%, transparent 78%);
  -webkit-mask-image: radial-gradient(ellipse 80% 60% at 50% 0%, #000 20%, transparent 78%);
}

.bg-grain {
  position: absolute;
  inset: -50%;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='180' height='180'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.82' numOctaves='3' stitchTiles='stitch'/%3E%3CfeColorMatrix type='saturate' values='0'/%3E%3C/filter%3E%3Crect width='180' height='180' filter='url(%23n)'/%3E%3C/svg%3E");
  opacity: var(--grain-opacity);
  pointer-events: none;
}

/* ------------------------------ 玻璃面 ------------------------------ */
.glass {
  position: relative;
  background: var(--glass);
  border: 1px solid var(--glass-border);
  border-radius: var(--r-lg);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  box-shadow: var(--shadow), inset 0 1px 0 var(--glass-inner);
}

@supports not ((backdrop-filter: blur(1px)) or (-webkit-backdrop-filter: blur(1px))) {
  .glass,
  .header-inner,
  .submenu-wrap,
  .lang-menu {
    background: var(--glass-solid);
  }
}

/* ------------------------------ 头部 ------------------------------ */
.site-header {
  position: sticky;
  top: 0;
  z-index: 90;
  padding: 12px 16px 0;
}

.header-inner {
  position: relative;
  max-width: var(--w-page);
  margin: 0 auto;
  height: 58px;
  padding: 0 10px 0 14px;
  display: flex;
  align-items: center;
  gap: 14px;
  border-radius: 18px;
  background: var(--glass);
  border: 1px solid var(--glass-border);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  box-shadow: 0 20px 44px -34px rgba(0, 0, 0, 0.9), inset 0 1px 0 var(--glass-inner);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  min-width: 0;
  flex-shrink: 0;
}

.brand-avatar {
  width: 34px;
  height: 34px;
  border-radius: 50%;
  object-fit: cover;
  border: 1px solid var(--glass-border);
  box-shadow: 0 4px 14px -6px rgba(0, 0, 0, 0.6);
}

.brand-text {
  display: flex;
  flex-direction: column;
  line-height: 1.1;
  min-width: 0;
}

.brand-name {
  font-size: 0.98rem;
  font-weight: 680;
  letter-spacing: -0.01em;
  white-space: nowrap;
}

.brand-sub {
  font-size: 0.62rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--fg-4);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 190px;
}

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

.site-nav {
  margin-left: auto;
}

.nav-item {
  position: relative;
  display: flex;
  align-items: center;
}

.nav-link {
  display: inline-flex;
  align-items: center;
  height: 36px;
  padding: 0 12px;
  border-radius: 999px;
  font-size: 0.88rem;
  color: var(--fg-2);
  transition: color var(--dur) var(--ease), background var(--dur) var(--ease);
  white-space: nowrap;
}

.nav-link:hover {
  color: var(--fg);
  background: var(--hover);
}

.nav-link.is-active {
  color: var(--fg);
  background: var(--hover);
}

.nav-link.is-active::after {
  content: "";
  position: absolute;
  left: 50%;
  bottom: -1px;
  width: 4px;
  height: 4px;
  margin-left: -2px;
  border-radius: 50%;
  background: var(--fg);
  opacity: 0.6;
}

.nav-toggle {
  display: inline-grid;
  place-items: center;
  width: 22px;
  height: 26px;
  margin-left: -8px;
  padding: 0;
  border: 0;
  background: transparent;
  color: var(--fg-3);
  cursor: pointer;
  border-radius: 6px;
  transition: transform var(--dur) var(--ease), color var(--dur) var(--ease);
}

.nav-toggle svg {
  width: 12px;
  height: 12px;
}

.nav-item.is-open .nav-toggle {
  transform: rotate(180deg);
  color: var(--fg);
}

.submenu-wrap {
  position: absolute;
  top: calc(100% + 12px);
  left: -6px;
  min-width: 190px;
  padding: 6px;
  border-radius: 14px;
  background: var(--glass-2);
  border: 1px solid var(--glass-border);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  box-shadow: var(--shadow);
  animation: popIn 180ms var(--ease) both;
}

.submenu {
  display: flex;
  flex-direction: column;
}

.submenu a {
  display: block;
  padding: 9px 12px;
  border-radius: 9px;
  font-size: 0.86rem;
  color: var(--fg-2);
  transition: background var(--dur) var(--ease), color var(--dur) var(--ease);
}

.submenu a:hover {
  background: var(--hover);
  color: var(--fg);
}

.submenu-skeleton {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 6px;
}

.submenu-skeleton span {
  display: block;
  height: 12px;
  border-radius: 6px;
  background: linear-gradient(90deg, var(--hover), var(--hover-2), var(--hover));
  background-size: 200% 100%;
  animation: shimmer 1.4s ease-in-out infinite;
}

.submenu-skeleton span:nth-child(2) {
  width: 62%;
}

/* 头部右侧动作 */
.header-actions {
  display: flex;
  align-items: center;
  gap: 4px;
  margin-left: auto;
}

.site-nav + .header-actions {
  margin-left: 8px;
}

.icon-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  height: 36px;
  min-width: 36px;
  padding: 0 9px;
  border: 1px solid transparent;
  border-radius: 999px;
  background: transparent;
  color: var(--fg-2);
  cursor: pointer;
  transition: background var(--dur) var(--ease), color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.icon-btn:hover {
  background: var(--hover);
  color: var(--fg);
}

.ico {
  width: 18px;
  height: 18px;
}

.theme-btn .ico-moon {
  display: none;
}

:root[data-theme="dark"] .theme-btn .ico-moon {
  display: block;
}

:root[data-theme="dark"] .theme-btn .ico-sun {
  display: none;
}

.lang-label {
  font-size: 0.78rem;
  letter-spacing: 0.01em;
  max-width: 76px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.lang-switch {
  position: relative;
}

.lang-menu {
  position: absolute;
  top: calc(100% + 12px);
  right: 0;
  width: 168px;
  padding: 6px;
  border-radius: 14px;
  background: var(--glass-2);
  border: 1px solid var(--glass-border);
  box-shadow: var(--shadow);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  max-height: 300px;
  overflow: auto;
  animation: popIn 180ms var(--ease) both;
  z-index: 30;
}

.lang-option {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  padding: 8px 11px;
  border: 0;
  border-radius: 9px;
  background: transparent;
  font-size: 0.85rem;
  color: var(--fg-2);
  text-align: left;
  cursor: pointer;
}

.lang-option:hover {
  background: var(--hover);
  color: var(--fg);
}

.lang-option[aria-selected="true"] {
  color: var(--fg);
  background: var(--hover);
}

.lang-option[aria-selected="true"]::after {
  content: "✓";
  font-size: 0.8rem;
  opacity: 0.7;
}

.nav-btn {
  display: none;
}

.burger {
  display: block;
  width: 18px;
}

.burger i {
  display: block;
  height: 1.5px;
  border-radius: 2px;
  background: currentColor;
  transition: transform var(--dur) var(--ease), opacity var(--dur) var(--ease);
}

.burger i + i {
  margin-top: 5px;
}

body.nav-open .burger i:first-child {
  transform: translateY(3.25px) rotate(45deg);
}

body.nav-open .burger i:last-child {
  transform: translateY(-3.25px) rotate(-45deg);
}

/* ------------------------------ 布局 ------------------------------ */
/* header 用 sticky，本身就在文档流里占位，这里只留一点呼吸间距 */
.site-main {
  padding: clamp(10px, 2vw, 20px) 0 0;
  min-height: 60vh;
}

.site-header {
  margin-bottom: 0;
}

.wrap {
  width: 100%;
  max-width: var(--w-page);
  margin: 0 auto;
  padding: 0 22px;
}

.wrap-narrow {
  max-width: var(--w-narrow);
}

.home {
  max-width: var(--w-page);
  margin: 0 auto;
  padding: 0 22px;
}

.pad {
  padding: clamp(22px, 3vw, 34px);
}

/* ------------------------------ 通用排版件 ------------------------------ */
.kicker {
  margin: 0 0 12px;
  font-size: 0.68rem;
  font-weight: 600;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--fg-4);
}

.page-head {
  padding: clamp(24px, 5vw, 52px) 0 26px;
}

.page-title {
  font-size: clamp(2rem, 5vw, 3.1rem);
  letter-spacing: -0.03em;
  line-height: 1.06;
}

.page-desc {
  margin-top: 12px;
  max-width: 54ch;
  color: var(--fg-3);
  font-size: 1rem;
}

.section-head {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 20px;
  margin-bottom: 20px;
}

.section-title {
  font-size: clamp(1.4rem, 2.6vw, 1.85rem);
  letter-spacing: -0.025em;
}

.more-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.82rem;
  color: var(--fg-3);
  padding-bottom: 3px;
  border-bottom: 1px solid transparent;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
  white-space: nowrap;
}

.more-link svg {
  width: 14px;
  height: 14px;
  transition: transform var(--dur) var(--ease);
}

.more-link:hover {
  color: var(--fg);
  border-color: var(--line-strong);
}

.more-link:hover svg {
  transform: translateX(3px);
}

.panel-title {
  font-size: 0.82rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--fg-3);
  margin-bottom: 14px;
}

/* ------------------------------ 按钮 ------------------------------ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  height: 44px;
  padding: 0 20px;
  border-radius: 999px;
  border: 1px solid var(--line-strong);
  background: transparent;
  color: var(--fg);
  font-size: 0.9rem;
  font-weight: 550;
  cursor: pointer;
  transition: transform var(--dur) var(--ease), background var(--dur) var(--ease), color var(--dur) var(--ease),
    border-color var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
  white-space: nowrap;
}

.btn:hover {
  background: var(--hover);
}

.btn:active {
  transform: translateY(1px);
}

.btn-primary {
  background: var(--accent);
  color: var(--accent-fg);
  border-color: transparent;
  box-shadow: 0 16px 34px -22px rgba(0, 0, 0, 0.9);
}

.btn-primary:hover {
  background: var(--accent);
  opacity: 0.92;
}

.btn-ghost {
  border-color: var(--line-strong);
  color: var(--fg-2);
}

.btn-ghost:hover {
  color: var(--fg);
  border-color: var(--fg-3);
}

.btn-sm {
  height: 34px;
  padding: 0 14px;
  font-size: 0.81rem;
}

.btn-arrow {
  width: 15px;
  height: 15px;
  transition: transform var(--dur) var(--ease);
}

.btn:hover .btn-arrow,
.post-card:hover .btn-arrow {
  transform: translateX(3px);
}

/* ------------------------------ 标签 / 芯片 ------------------------------ */
.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  height: 24px;
  padding: 0 10px;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: var(--hover);
  color: var(--fg-2);
  font-size: 0.72rem;
  letter-spacing: 0.01em;
  transition: color var(--dur) var(--ease), background var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

a.tag:hover {
  color: var(--fg);
  border-color: var(--line-strong);
  background: var(--hover-2);
}

.tag-n {
  font-size: 0.66rem;
  color: var(--fg-4);
  font-variant-numeric: tabular-nums;
}

.tag-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.tag-cloud {
  display: flex;
  flex-wrap: wrap;
  gap: 9px;
}

.tag-panel {
  margin: 40px 0 10px;
  padding: 22px 24px;
}

/* ------------------------------ 分类归档 ------------------------------ */
.archive-nav {
  margin: 0 0 18px;
}

.archive-group {
  margin: 0 0 16px;
  padding: 20px 24px 8px;
}

.archive-head {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding-bottom: 12px;
  margin-bottom: 4px;
  border-bottom: 1px solid var(--line);
}

.archive-head h2 {
  font-size: 1.06rem;
  letter-spacing: -0.01em;
}

.archive-count {
  font-size: 0.78rem;
  color: var(--fg-4);
  font-variant-numeric: tabular-nums;
}

.archive-list {
  margin: 0;
  padding: 0;
  list-style: none;
}

.archive-item {
  display: grid;
  grid-template-columns: 92px minmax(0, 1fr) auto;
  align-items: baseline;
  gap: 14px;
  padding: 11px 0;
  border-bottom: 1px dashed var(--line);
}

.archive-item:last-child {
  border-bottom: 0;
}

.archive-item time {
  font-size: 0.8rem;
  color: var(--fg-4);
  font-variant-numeric: tabular-nums;
  font-family: var(--font-mono);
}

.archive-link {
  font-size: 0.95rem;
  color: var(--fg);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  transition: opacity var(--dur) var(--ease);
}

.archive-link:hover {
  opacity: 0.6;
}

.archive-views {
  font-size: 0.76rem;
  color: var(--fg-4);
  white-space: nowrap;
}

@media (max-width: 640px) {
  .archive-item {
    grid-template-columns: minmax(0, 1fr);
    gap: 4px;
    padding: 12px 0;
  }

  .archive-link {
    white-space: normal;
  }
}

.chip {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  height: 32px;
  padding: 0 14px;
  border-radius: 999px;
  border: 1px solid var(--line);
  font-size: 0.82rem;
  color: var(--fg-2);
  transition: all var(--dur) var(--ease);
}

.chip span {
  font-size: 0.7rem;
  color: var(--fg-4);
}

.chip:hover {
  color: var(--fg);
  background: var(--hover);
}

.chip.is-active {
  background: var(--accent);
  color: var(--accent-fg);
  border-color: transparent;
}

.chip.is-active span {
  color: inherit;
  opacity: 0.6;
}

.chips {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

/* ------------------------------ Hero ------------------------------ */
.hero {
  padding: clamp(10px, 3vw, 26px) 0 clamp(30px, 5vw, 54px);
}

.hero-card {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 268px;
  gap: clamp(24px, 4vw, 48px);
  align-items: center;
  padding: clamp(26px, 4.2vw, 56px);
  border-radius: var(--r-xl);
  overflow: hidden;
}

.hero-card::after {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse 70% 90% at 88% 10%, var(--hover), transparent 60%);
  pointer-events: none;
}

.hero-title {
  font-size: clamp(2.05rem, 5.2vw, 3.7rem);
  letter-spacing: -0.035em;
  line-height: 1.04;
  max-width: 20ch;
}

.hero-desc {
  margin-top: 18px;
  max-width: 46ch;
  color: var(--fg-2);
  font-size: clamp(0.95rem, 1.6vw, 1.06rem);
  line-height: 1.72;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 28px;
}

.hero-stats {
  display: flex;
  gap: 32px;
  margin: 34px 0 0;
  padding-top: 22px;
  border-top: 1px solid var(--line);
}

.hero-stats dt {
  font-size: 0.68rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--fg-4);
}

.hero-stats dd {
  margin: 6px 0 0;
  font-size: 1.3rem;
  font-weight: 600;
  font-variant-numeric: tabular-nums;
  letter-spacing: -0.02em;
}

.hero-side {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 18px;
  text-align: center;
}

.hero-avatar-wrap {
  position: relative;
  width: 132px;
  height: 132px;
  display: grid;
  place-items: center;
}

.hero-avatar {
  position: relative;
  width: 112px;
  height: 112px;
  border-radius: 50%;
  object-fit: cover;
  border: 1px solid var(--glass-border);
  box-shadow: 0 24px 50px -26px rgba(0, 0, 0, 0.85);
}

.hero-avatar-ring {
  position: absolute;
  inset: 0;
  border-radius: 50%;
  background: conic-gradient(from 0deg, transparent 0deg, var(--line-strong) 90deg, transparent 180deg, var(--line) 300deg, transparent 360deg);
  animation: spin 18s linear infinite;
  mask: radial-gradient(circle, transparent 58%, #000 59%);
  -webkit-mask: radial-gradient(circle, transparent 58%, #000 59%);
  opacity: 0.9;
}

.hero-side-note {
  font-size: 0.8rem;
  line-height: 1.66;
  color: var(--fg-3);
  max-width: 22ch;
}

/* ------------------------------ 首页分区 ------------------------------ */
.home-section {
  padding: clamp(28px, 5vw, 52px) 0 8px;
}

.home-section + .home-section {
  border-top: 1px solid var(--line);
}

/* ------------------------------ 文章卡片 ------------------------------ */
.post-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(298px, 1fr));
  gap: 20px;
}

.post-card {
  overflow: hidden;
  border-radius: var(--r-lg);
  transition: transform 340ms var(--ease), box-shadow 340ms var(--ease), border-color 340ms var(--ease);
  animation: cardIn 480ms var(--ease) both;
}

.post-card:hover {
  transform: translateY(-3px);
  border-color: var(--line-strong);
  box-shadow: var(--shadow-hover), inset 0 1px 0 var(--glass-inner);
}

.post-card-link {
  display: block;
}

.media {
  position: relative;
  display: block;
  margin: 0;
  overflow: hidden;
  background: var(--media-bg);
}

.post-cover {
  border-radius: 0;
}

.post-cover::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(100deg, var(--media-bg) 30%, var(--hover-2) 50%, var(--media-bg) 70%);
  background-size: 220% 100%;
  animation: shimmer 1.8s ease-in-out infinite;
  opacity: 0.7;
}

.post-cover.is-loaded::before {
  display: none;
}

.media-img {
  position: relative;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0;
  transition: opacity 480ms var(--ease), transform 620ms var(--ease);
  z-index: 1;
}

.media-img.is-loaded,
.media-img[data-loaded="1"] {
  opacity: 1;
}

.post-card:hover .media-img {
  transform: scale(1.035);
}

.media-shade {
  position: absolute;
  inset: 0;
  z-index: 2;
  background: linear-gradient(to top, rgba(0, 0, 0, 0.35), transparent 55%);
  opacity: 0.9;
  pointer-events: none;
}

.pin-badge {
  position: absolute;
  top: 12px;
  left: 12px;
  z-index: 3;
  padding: 3px 9px;
  border-radius: 999px;
  background: rgba(10, 10, 12, 0.62);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.18);
  color: #f4f4f6;
  font-size: 0.66rem;
  letter-spacing: 0.08em;
}

.post-body {
  padding: 18px 20px 20px;
}

.post-meta {
  display: flex;
  align-items: center;
  gap: 7px;
  font-size: 0.72rem;
  color: var(--fg-4);
  letter-spacing: 0.04em;
  font-variant-numeric: tabular-nums;
}

.post-cat {
  color: var(--fg-3);
}

.dot {
  opacity: 0.55;
}

.post-title {
  margin: 9px 0 0;
  font-size: 1.08rem;
  line-height: 1.38;
  letter-spacing: -0.02em;
}

.post-excerpt {
  margin-top: 9px;
  color: var(--fg-3);
  font-size: 0.86rem;
  line-height: 1.62;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.post-more {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-top: 14px;
  font-size: 0.78rem;
  color: var(--fg-4);
  transition: color var(--dur) var(--ease);
}

.post-card:hover .post-more {
  color: var(--fg);
}

.post-tags {
  display: flex;
  gap: 6px;
  padding: 0 20px 16px;
}

/* ------------------------------ 动态 ------------------------------ */
.moment-list {
  display: flex;
  flex-direction: column;
}

.moment {
  display: grid;
  grid-template-columns: 20px 118px minmax(0, 1fr);
  gap: 14px;
  padding-bottom: 18px;
}

.moment-rail {
  position: relative;
}

.moment-rail::before {
  content: "";
  position: absolute;
  left: 9px;
  top: 6px;
  bottom: -18px;
  width: 1px;
  background: var(--line);
}

.moment:last-child .moment-rail::before {
  bottom: 50%;
}

.moment-dot {
  position: absolute;
  left: 4px;
  top: 16px;
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: var(--bg);
  border: 1px solid var(--line-strong);
  box-shadow: 0 0 0 4px var(--bg);
}

.moment-date {
  padding-top: 14px;
  font-size: 0.74rem;
  color: var(--fg-4);
  letter-spacing: 0.03em;
  font-variant-numeric: tabular-nums;
}

.moment-card {
  padding: 16px 20px;
  border-radius: var(--r-md);
  animation: cardIn 440ms var(--ease) both;
}

.moment-text {
  font-size: 0.94rem;
  line-height: 1.74;
  color: var(--fg-2);
  overflow-wrap: anywhere;
}

.moment-text a {
  color: var(--fg);
  border-bottom: 1px solid var(--line-strong);
}

.moment-images {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
  gap: 8px;
  margin-top: 13px;
}

.moment-images.is-single {
  grid-template-columns: minmax(0, 300px);
}

.moment-image figure {
  margin: 0;
  border-radius: 10px;
  overflow: hidden;
}

.moment-image .media-img {
  transition: transform 500ms var(--ease), opacity 400ms var(--ease);
}

.moment-image:hover .media-img {
  transform: scale(1.04);
}

.moment-meta {
  margin-top: 10px;
  font-size: 0.7rem;
  color: var(--fg-4);
  letter-spacing: 0.03em;
}

/* ------------------------------ App ------------------------------ */
.app-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(318px, 1fr));
  gap: 18px;
}

.app-grid-lg {
  grid-template-columns: repeat(auto-fill, minmax(360px, 1fr));
}

.app-card {
  display: flex;
  flex-direction: column;
  gap: 16px;
  padding: 20px;
  border-radius: var(--r-lg);
  transition: transform 340ms var(--ease), border-color 340ms var(--ease), box-shadow 340ms var(--ease);
  animation: cardIn 460ms var(--ease) both;
}

.app-card:hover {
  transform: translateY(-2px);
  border-color: var(--line-strong);
  box-shadow: var(--shadow-hover), inset 0 1px 0 var(--glass-inner);
}

.app-head {
  display: flex;
  gap: 14px;
  align-items: flex-start;
}

.app-icon {
  width: 60px;
  height: 60px;
  border-radius: 16px;
  flex-shrink: 0;
  border: 1px solid var(--glass-border);
  background: var(--media-bg);
}

.app-name {
  font-size: 1.05rem;
  letter-spacing: -0.02em;
}

.app-summary {
  margin-top: 6px;
  font-size: 0.85rem;
  color: var(--fg-3);
  line-height: 1.6;
}

.app-detail {
  font-size: 0.85rem;
  color: var(--fg-2);
  border-top: 1px solid var(--line);
  padding-top: 14px;
}

.app-shots {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 8px;
}

.app-shots figure {
  margin: 0;
  border-radius: 10px;
  overflow: hidden;
}

.app-foot {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
  margin-top: auto;
}

.app-actions {
  display: flex;
  align-items: center;
  gap: 8px;
}

.app-platforms {
  display: inline-flex;
  gap: 6px;
  margin-right: 2px;
}

.app-platforms span {
  font-size: 0.68rem;
  color: var(--fg-4);
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 2px 6px;
}

/* ------------------------------ 友链 ------------------------------ */
.friend-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
  gap: 12px;
}

.friend-grid-lg {
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 14px;
}

.friend-card {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 16px;
  border-radius: var(--r-md);
  transition: transform 300ms var(--ease), border-color 300ms var(--ease), background 300ms var(--ease);
  animation: cardIn 420ms var(--ease) both;
}

.friend-card:hover {
  transform: translateY(-2px);
  border-color: var(--line-strong);
  background: var(--glass-2);
}

.friend-avatar {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  object-fit: cover;
  flex-shrink: 0;
  border: 1px solid var(--glass-border);
  background: var(--media-bg);
}

.friend-body {
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 3px;
}

.friend-name {
  font-size: 0.9rem;
  font-weight: 560;
}

.friend-desc {
  font-size: 0.76rem;
  color: var(--fg-3);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.apply-card {
  margin: 32px 0 10px;
  padding: clamp(22px, 3vw, 32px);
}

.apply-mail {
  margin-top: 16px;
}

/* ------------------------------ 列表工具栏 ------------------------------ */
.toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
  padding: 12px 16px;
  border-radius: 999px;
  margin-bottom: 26px;
}

.search-form {
  display: flex;
  align-items: center;
  gap: 8px;
}

.search-form input[type="search"] {
  height: 34px;
  width: 190px;
  padding: 0 14px;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: var(--bg-soft);
  font-size: 0.83rem;
  transition: border-color var(--dur) var(--ease), width var(--dur) var(--ease);
}

.search-form input[type="search"]:focus {
  border-color: var(--line-strong);
  outline: none;
}

.search-form input[type="search"]::placeholder {
  color: var(--fg-4);
}

.filter-note {
  margin: -8px 0 20px;
  font-size: 0.82rem;
  color: var(--fg-3);
}

.load-more {
  display: flex;
  justify-content: center;
  padding: 34px 0 10px;
}

/* ------------------------------ 文章详情 ------------------------------ */
.breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.76rem;
  color: var(--fg-4);
  padding: 8px 0 0;
  flex-wrap: wrap;
}

.breadcrumb a:hover {
  color: var(--fg);
}

.breadcrumb span[aria-current] {
  color: var(--fg-3);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  max-width: 40ch;
}

.post-detail {
  padding: clamp(20px, 4vw, 40px) 0 0;
}

.post-head {
  padding-bottom: 26px;
}

.post-h1 {
  font-size: clamp(1.9rem, 4.4vw, 2.9rem);
  letter-spacing: -0.035em;
  line-height: 1.12;
  max-width: 24ch;
}

.post-sub {
  margin-top: 16px;
  font-size: 1.02rem;
  color: var(--fg-3);
  line-height: 1.7;
  max-width: 56ch;
}

.post-meta-row {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
  margin-top: 22px;
  font-size: 0.78rem;
  color: var(--fg-4);
  font-variant-numeric: tabular-nums;
}

.author-chip {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--fg-2);
  padding-right: 6px;
}

.author-chip img {
  width: 26px;
  height: 26px;
  border-radius: 50%;
  object-fit: cover;
  border: 1px solid var(--glass-border);
}

.post-hero {
  border-radius: var(--r-lg);
  overflow: hidden;
  border: 1px solid var(--glass-border);
  margin: 0 0 34px;
}

.post-hero .media-img {
  opacity: 1;
}

.post-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 40px;
  align-items: start;
}

.post-layout:has(.toc) {
  grid-template-columns: minmax(0, 1fr) 190px;
}

.toc {
  position: sticky;
  top: calc(var(--header-h) + 22px);
  padding: 16px 18px;
  border-radius: var(--r-md);
  font-size: 0.8rem;
}

.toc-title {
  font-size: 0.66rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--fg-4);
  margin-bottom: 10px;
}

.toc ol {
  display: flex;
  flex-direction: column;
  gap: 8px;
  counter-reset: toc;
}

.toc a {
  color: var(--fg-3);
  line-height: 1.5;
  display: block;
  padding-left: 12px;
  border-left: 1px solid var(--line);
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.toc a:hover {
  color: var(--fg);
  border-color: var(--line-strong);
}

.post-foot {
  margin-top: 34px;
  padding-top: 22px;
  border-top: 1px solid var(--line);
}

.post-nav {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
  margin-top: 34px;
}

.post-nav-item {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 18px 20px;
  border-radius: var(--r-md);
  transition: border-color var(--dur) var(--ease), transform var(--dur) var(--ease);
}

.post-nav-item:hover {
  border-color: var(--line-strong);
  transform: translateY(-2px);
}

.post-nav-item.is-next {
  text-align: right;
}

.post-nav-label {
  font-size: 0.7rem;
  letter-spacing: 0.08em;
  color: var(--fg-4);
}

.post-nav-title {
  font-size: 0.9rem;
  color: var(--fg);
  line-height: 1.5;
}

.related {
  margin-top: 46px;
}

.back-row {
  margin: 34px 0 0;
  text-align: center;
}

/* ------------------------------ 正文 markdown ------------------------------ */
.md {
  font-size: 1.02rem;
  line-height: 1.82;
  color: var(--fg-2);
  overflow-wrap: break-word;
}

.md > *:first-child {
  margin-top: 0;
}

.md p {
  margin: 1.1em 0;
}

.md h2 {
  margin: 2.2em 0 0.7em;
  font-size: 1.42rem;
  color: var(--fg);
  letter-spacing: -0.022em;
  scroll-margin-top: calc(var(--header-h) + 24px);
}

.md h3 {
  margin: 1.8em 0 0.6em;
  font-size: 1.14rem;
  color: var(--fg);
}

.md h2 + p,
.md h3 + p {
  margin-top: 0.5em;
}

.md strong {
  color: var(--fg);
  font-weight: 620;
}

.md em {
  font-style: italic;
}

.md a {
  color: var(--fg);
  border-bottom: 1px solid var(--line-strong);
  transition: opacity var(--dur) var(--ease);
}

.md a:hover {
  opacity: 0.75;
}

.md ul,
.md ol {
  margin: 1.1em 0;
  padding-left: 1.35em;
  list-style: revert;
}

.md li {
  margin: 0.42em 0;
}

.md li::marker {
  color: var(--fg-4);
}

.md blockquote {
  margin: 1.5em 0;
  padding: 14px 20px;
  border-left: 2px solid var(--line-strong);
  border-radius: 0 var(--r-sm) var(--r-sm) 0;
  background: var(--hover);
  color: var(--fg-3);
  font-style: normal;
}

.md blockquote p {
  margin: 0.4em 0;
}

.md code {
  font-family: var(--font-mono);
  font-size: 0.86em;
  padding: 0.16em 0.42em;
  border-radius: 6px;
  background: var(--hover-2);
  color: var(--fg);
  border: 1px solid var(--line);
}

.md pre {
  margin: 1.5em 0;
  padding: 18px 20px;
  border-radius: var(--r-md);
  background: var(--code-bg);
  border: 1px solid var(--line);
  overflow-x: auto;
  line-height: 1.66;
  font-size: 0.86rem;
  -webkit-overflow-scrolling: touch;
}

.md pre code {
  padding: 0;
  border: 0;
  background: none;
  font-size: inherit;
  color: var(--fg-2);
}

.md img {
  border-radius: var(--r-md);
  border: 1px solid var(--line);
  margin: 1.6em 0;
}

.md hr {
  margin: 2.4em 0;
  border: 0;
  border-top: 1px solid var(--line);
}

.md .table-wrap {
  overflow-x: auto;
  margin: 1.6em 0;
  border: 1px solid var(--line);
  border-radius: var(--r-md);
}

.md table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.88rem;
}

.md th,
.md td {
  padding: 10px 14px;
  text-align: left;
  border-bottom: 1px solid var(--line);
}

.md th {
  color: var(--fg);
  font-weight: 560;
  background: var(--hover);
  white-space: nowrap;
}

.md tr:last-child td {
  border-bottom: 0;
}

.md-sm {
  font-size: 0.9rem;
  line-height: 1.75;
}

.page-body {
  margin-bottom: 40px;
}

/* ------------------------------ 空状态 / 404 ------------------------------ */
.empty-state {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 28px 26px;
  color: var(--fg-3);
  font-size: 0.9rem;
  border-radius: var(--r-md);
}

.empty-mark {
  display: grid;
  place-items: center;
  width: 34px;
  height: 34px;
  border-radius: 50%;
  border: 1px solid var(--line-strong);
  color: var(--fg-4);
  font-size: 0.9rem;
}

.notfound {
  margin: 40px 0;
  padding: clamp(30px, 6vw, 60px);
  text-align: center;
}

.notfound .page-title {
  margin-bottom: 12px;
}

.notfound .page-desc {
  margin: 0 auto;
}

.notfound-actions {
  display: flex;
  gap: 10px;
  justify-content: center;
  margin-top: 26px;
}

/* ------------------------------ 页脚 ------------------------------ */
.site-footer {
  margin-top: clamp(50px, 8vw, 96px);
  border-top: 1px solid var(--line);
  background: linear-gradient(to bottom, transparent, var(--hover));
}

.footer-inner {
  max-width: var(--w-page);
  margin: 0 auto;
  padding: 44px 22px 30px;
  display: grid;
  grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr);
  gap: 32px;
}

.brand-sm .brand-name {
  font-size: 0.92rem;
}

.footer-tagline {
  margin-top: 12px;
  font-size: 0.83rem;
  color: var(--fg-3);
  max-width: 34ch;
}

.social-list {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 16px;
  font-size: 0.8rem;
  color: var(--fg-3);
}

.social-list a:hover {
  color: var(--fg);
}

.footer-nav {
  display: flex;
  justify-content: flex-end;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 20px;
  font-size: 0.82rem;
  color: var(--fg-3);
  align-content: flex-start;
}

.footer-links a:hover {
  color: var(--fg);
}

.footer-bottom {
  grid-column: 1 / -1;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
  padding-top: 22px;
  border-top: 1px solid var(--line);
  font-size: 0.74rem;
  color: var(--fg-4);
}

.footer-meta {
  display: flex;
  gap: 8px;
}

.footer-meta a:hover,
.footer-bottom a:hover {
  color: var(--fg-2);
}

/* ------------------------------ 公告 ------------------------------ */
.announcement {
  position: relative;
  z-index: 80;
  padding: 8px 20px;
  text-align: center;
  font-size: 0.8rem;
  color: var(--fg-2);
  background: var(--hover-2);
  border-bottom: 1px solid var(--line);
}

/* ------------------------------ 灯箱 ------------------------------ */
.lightbox {
  position: fixed;
  inset: 0;
  z-index: 300;
  display: grid;
  place-items: center;
  padding: 24px;
  background: rgba(4, 4, 6, 0.82);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  animation: fadeIn 200ms var(--ease) both;
}

.lightbox img {
  max-width: min(1100px, 92vw);
  max-height: 86vh;
  border-radius: var(--r-md);
  box-shadow: 0 40px 90px -40px #000;
}

.lightbox-close {
  position: absolute;
  top: 18px;
  right: 18px;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  border: 1px solid rgba(255, 255, 255, 0.2);
  background: rgba(20, 20, 24, 0.6);
  color: #f4f4f6;
  font-size: 1.1rem;
  cursor: pointer;
}

/* ------------------------------ 动画 ------------------------------ */
@keyframes cardIn {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

@keyframes popIn {
  from {
    opacity: 0;
    transform: translateY(-4px) scale(0.985);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

@keyframes fadeIn {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

@keyframes shimmer {
  0% {
    background-position: 200% 0;
  }
  100% {
    background-position: -60% 0;
  }
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

/* 翻译脚本运行时避免文字闪烁（可选增强） */
html.translating body {
  opacity: 0.999;
}

/* ------------------------------ 响应式 ------------------------------ */
@media (max-width: 1024px) {
  .hero-card {
    grid-template-columns: minmax(0, 1fr) 220px;
  }
  .post-layout:has(.toc) {
    grid-template-columns: minmax(0, 1fr);
  }
  .toc {
    display: none;
  }
}

@media (max-width: 920px) {
  :root {
    --header-h: 64px;
  }

  .site-header {
    padding: 8px 10px 0;
  }

  .header-inner {
    height: 52px;
    padding: 0 8px 0 10px;
    border-radius: 16px;
  }

  .brand-sub {
    display: none;
  }

  /* 手机上导航是绝对定位的浮层，不再占据 header 的流内空间；
     如果沿用桌面端的 `.site-nav + .header-actions { margin-left: 8px }`，
     两个按钮会卡在品牌名后面、右边空一大块。这里显式贴右。 */
  .header-actions,
  .site-nav + .header-actions {
    margin-left: auto;
  }

  .nav-btn {
    display: inline-flex;
  }

  .site-nav {
    position: absolute;
    top: calc(100% + 8px);
    left: 0;
    right: 0;
    display: none;
    padding: 8px;
    border-radius: 16px;
    /* 移动端不依赖 backdrop-filter：低端 WebView 会掉帧甚至不生效，
       所以这里用接近实色的表面，保证菜单文字在任何渲染下都读得清 */
    background: var(--glass-solid);
    border: 1px solid var(--glass-border);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    box-shadow: var(--shadow);
    max-height: min(70vh, 560px);
    overflow-y: auto;
    animation: popIn 200ms var(--ease) both;
    margin-left: 0;
  }

  body.nav-open .site-nav {
    display: block;
  }

  .nav-list {
    flex-direction: column;
    align-items: stretch;
    gap: 2px;
  }

  .nav-item {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
  }

  .nav-link {
    height: 42px;
    padding: 0 12px;
    font-size: 0.95rem;
    border-radius: 10px;
  }

  .nav-toggle {
    justify-self: end;
    width: 40px;
    height: 40px;
    margin: 0 2px 0 0;
  }

  .submenu-wrap {
    position: static;
    grid-column: 1 / -1;
    min-width: 0;
    padding: 2px 0 6px;
    margin-top: 2px;
    border: 0;
    background: transparent;
    box-shadow: none;
    backdrop-filter: none;
    -webkit-backdrop-filter: none;
    animation: none;
  }

  .submenu a {
    padding-left: 24px;
    font-size: 0.88rem;
  }

  .lang-label {
    display: none;
  }

  .lang-btn {
    padding: 0;
    width: 36px;
  }

  .hero-card {
    grid-template-columns: minmax(0, 1fr);
    padding: 24px 20px 26px;
    border-radius: 22px;
  }

  .hero-side {
    display: none;
  }

  .hero-stats {
    gap: 24px;
    margin-top: 26px;
    padding-top: 18px;
  }

  .hero-actions .btn {
    height: 42px;
    padding: 0 18px;
  }

  .wrap,
  .home {
    padding: 0 16px;
  }

  .site-main {
    padding-top: 10px;
  }

  .footer-inner {
    grid-template-columns: minmax(0, 1fr);
    gap: 24px;
    padding: 34px 16px 26px;
  }

  .footer-nav {
    justify-content: flex-start;
  }

  .moment {
    grid-template-columns: 18px minmax(0, 1fr);
    gap: 12px;
  }

  .moment-date {
    display: none;
  }

  .moment-card {
    padding: 14px 16px;
  }

  .toolbar {
    border-radius: var(--r-md);
    padding: 12px;
  }

  .search-form {
    width: 100%;
  }

  .search-form input[type="search"] {
    flex: 1;
    width: auto;
  }

  .post-grid {
    grid-template-columns: repeat(auto-fill, minmax(min(100%, 260px), 1fr));
    gap: 14px;
  }

  .post-nav {
    grid-template-columns: minmax(0, 1fr);
  }

  .post-nav-item.is-next {
    text-align: left;
  }

  .page-title {
    font-size: clamp(1.75rem, 7vw, 2.4rem);
  }

  .post-h1 {
    font-size: clamp(1.65rem, 6.4vw, 2.2rem);
  }

  .md {
    font-size: 0.98rem;
    line-height: 1.78;
  }

  .app-grid,
  .app-grid-lg {
    grid-template-columns: minmax(0, 1fr);
  }

  .friend-grid,
  .friend-grid-lg {
    grid-template-columns: minmax(0, 1fr);
  }

  .section-head {
    align-items: center;
  }

  .section-title {
    font-size: 1.3rem;
  }
}

@media (max-width: 520px) {
  .post-grid {
    grid-template-columns: minmax(0, 1fr);
  }

  .hero-stats {
    gap: 18px;
  }

  .hero-stats dd {
    font-size: 1.16rem;
  }

  .hero-title {
    font-size: clamp(1.85rem, 8.4vw, 2.4rem);
  }

  .filter-note {
    margin-top: -6px;
  }

  .footer-bottom {
    flex-direction: column;
    align-items: flex-start;
  }
}

/* ------------------------------ 无障碍 / 动效偏好 ------------------------------ */
@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }

  .hero-avatar-ring {
    display: none;
  }
}

@media (prefers-contrast: more) {
  :root {
    --line: rgba(255, 255, 255, 0.28);
    --glass: rgba(18, 18, 22, 0.94);
    --fg-2: #e6e6ea;
    --fg-3: #cfcfd6;
  }
  :root[data-theme="light"] {
    --line: rgba(0, 0, 0, 0.3);
    --glass: rgba(255, 255, 255, 0.97);
    --fg-2: #2a2a30;
    --fg-3: #44444c;
  }
}

/* 打印 */
@media print {
  .bg-stack,
  .site-header,
  .site-footer,
  .post-nav,
  .related,
  .toc,
  .back-row,
  .load-more {
    display: none !important;
  }
  body {
    background: #fff;
    color: #000;
  }
  .glass {
    background: none;
    border: 0;
    box-shadow: none;
    backdrop-filter: none;
  }
}

/* ==========================================================================
   登录相关（仅登录验证：账号密码 / 扫码 / 只读身份）
   ========================================================================== */

.account-btn {
  padding: 0;
  overflow: hidden;
}

.account-avatar {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  object-fit: cover;
}

.account-initial {
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--fg);
}

.auth-wrap {
  max-width: 460px;
  margin: 44px auto 80px;
  padding: 0 16px;
}

.auth-card {
  padding: 34px 30px 26px;
  border-radius: var(--r-xl);
}

.auth-kicker {
  font-size: 0.68rem;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: var(--fg-4);
  margin-bottom: 12px;
}

.auth-title {
  font-size: 1.72rem;
  letter-spacing: -0.03em;
  margin-bottom: 10px;
}

.auth-desc {
  font-size: 0.88rem;
  line-height: 1.7;
  color: var(--fg-3);
  margin-bottom: 22px;
}

.auth-alert {
  padding: 11px 14px;
  margin-bottom: 16px;
  border-radius: 12px;
  font-size: 0.85rem;
  line-height: 1.6;
  color: #ff8b8b;
  background: rgba(255, 90, 90, 0.1);
  border: 1px solid rgba(255, 90, 90, 0.28);
}

:root[data-theme="light"] .auth-alert {
  color: #b42318;
  background: rgba(220, 60, 50, 0.07);
  border-color: rgba(220, 60, 50, 0.22);
}

.auth-alert.is-ok {
  color: #5fd39a;
  background: rgba(70, 200, 140, 0.1);
  border-color: rgba(70, 200, 140, 0.28);
}

:root[data-theme="light"] .auth-alert.is-ok {
  color: #067647;
  background: rgba(10, 150, 100, 0.07);
  border-color: rgba(10, 150, 100, 0.22);
}

.auth-tabs {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 4px;
  padding: 4px;
  margin-bottom: 20px;
  border-radius: 14px;
  background: var(--hover);
  border: 1px solid var(--line);
}

.auth-tabs:has(.auth-tab:only-child) {
  grid-template-columns: 1fr;
}

.auth-tab {
  height: 38px;
  border: 0;
  border-radius: 10px;
  background: transparent;
  color: var(--fg-3);
  font-size: 0.88rem;
  font-weight: 500;
  cursor: pointer;
  transition: background var(--dur) var(--ease), color var(--dur) var(--ease);
}

.auth-tab.is-active {
  background: var(--accent);
  color: var(--accent-fg);
  font-weight: 600;
}

.auth-form {
  display: grid;
  gap: 8px;
}

.auth-form label {
  font-size: 0.8rem;
  color: var(--fg-3);
  margin-top: 6px;
}

.auth-form input {
  height: 44px;
  padding: 0 14px;
  border-radius: 12px;
  border: 1px solid var(--line-strong);
  background: var(--glass-inner);
  color: var(--fg);
  font-size: 0.95rem;
  transition: border-color var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}

.auth-form input:focus {
  outline: none;
  border-color: var(--fg-3);
  box-shadow: 0 0 0 3px var(--hover-2);
}

.auth-submit {
  margin-top: 18px;
  height: 46px;
  width: 100%;
  justify-content: center;
  font-size: 0.95rem;
  font-weight: 600;
}

.auth-foot {
  margin-top: 22px;
  font-size: 0.74rem;
  line-height: 1.7;
  color: var(--fg-4);
}

.auth-note {
  padding: 14px 16px;
  margin: 18px 0;
  border-radius: 14px;
  background: var(--hover);
  border: 1px solid var(--line);
  font-size: 0.82rem;
  line-height: 1.7;
  color: var(--fg-3);
}

.auth-note strong {
  display: block;
  margin-bottom: 4px;
  color: var(--fg);
  font-size: 0.84rem;
}

.auth-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 20px;
}

.auth-actions .btn {
  flex: 1 1 auto;
  justify-content: center;
}

/* ---------------------------- 扫码 ---------------------------- */

.qr-box {
  display: grid;
  justify-items: center;
  gap: 12px;
  padding: 6px 0 2px;
}

.qr-stage {
  width: 232px;
  height: 232px;
  display: grid;
  place-items: center;
  border-radius: 18px;
  background: #fff;
  border: 1px solid var(--line);
  overflow: hidden;
}

.qr-stage img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  display: block;
}

.qr-stage.is-empty {
  background: var(--glass-inner);
}

.qr-status {
  font-size: 0.82rem;
  color: var(--fg-3);
  text-align: center;
  line-height: 1.6;
  min-height: 1.4em;
}

.qr-status.is-ok {
  color: #5fd39a;
}

.qr-status.is-bad {
  color: #ff8b8b;
}

.qr-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  justify-content: center;
}

.qr-hint {
  font-size: 0.74rem;
  color: var(--fg-4);
  text-align: center;
}

.qr-badge {
  font-size: 0.68rem;
  letter-spacing: 0.08em;
  color: var(--fg-4);
  padding: 3px 9px;
  border-radius: 999px;
  border: 1px dashed var(--line-strong);
}

/* ---------------------------- 我的 ---------------------------- */

.me-head {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 22px;
}

.me-avatar {
  width: 72px;
  height: 72px;
  border-radius: 50%;
  object-fit: cover;
  border: 1px solid var(--line-strong);
}

.me-id .auth-title {
  margin-bottom: 4px;
}

.me-sub {
  font-size: 0.8rem;
  color: var(--fg-4);
  font-family: var(--font-mono);
}

.me-list {
  display: grid;
  gap: 1px;
  margin: 0 0 18px;
  border-radius: 14px;
  overflow: hidden;
  border: 1px solid var(--line);
}

.me-list > div {
  display: grid;
  grid-template-columns: 96px minmax(0, 1fr);
  gap: 12px;
  align-items: baseline;
  padding: 11px 14px;
  background: var(--glass-inner);
}

.me-list dt {
  font-size: 0.78rem;
  color: var(--fg-4);
}

.me-list dd {
  margin: 0;
  font-size: 0.88rem;
  color: var(--fg);
  word-break: break-word;
}

.me-list code {
  font-family: var(--font-mono);
  font-size: 0.74rem;
  padding: 1px 6px;
  border-radius: 6px;
  background: var(--hover-2);
}

.me-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 22px;
}

.me-actions form {
  display: contents;
}

@media (max-width: 480px) {
  .auth-wrap {
    margin-top: 24px;
  }

  .auth-card {
    padding: 26px 20px 20px;
  }

  .qr-stage {
    width: 208px;
    height: 208px;
  }
}