/* =========================================================================
 * 个人导航 - 样式表
 * 原始来源：ops-coffee 主题，已根据本项目需求精简、合并并主题化。
 * 结构：
 *   1. 文档基础与排版
 *   2. 页面骨架（header / footer / container）
 *   3. 头部导航与偏好入口
 *   4. 内容区（nav-list / nav-item / nav-section-title）
 *   5. 搜索区与搜索引擎面板
 *   6. 偏好面板（segmented-control）
 *   7. 自绘滚动条
 *   8. 主题变量（theme / surface / density）
 *   9. 主题与质感重载
 *   10. 密度调整
 *   11. 响应式
 * ========================================================================= */

/* ---------- 1. 文档基础与排版 ---------- */
html {
  font-family: sans-serif;
  -ms-text-size-adjust: 100%;
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  font-size: 16px;
  color: #3e3e3e;
  line-height: 1.6;
  word-spacing: 0;
  letter-spacing: 0;
  background: #fafafa 0 0 repeat;
}

p { margin: 1.5em 0; }

h1, h2, h3, h4, h5, h6 {
  margin: 1em 0;
  font-weight: 700;
}
h1 { font-size: 1.8em; }
h2 { font-size: 1.6em; }
h3 { font-size: 1.4em; }
h4 { font-size: 1.2em; }
h5, h6 { font-size: 1em; }

ol, ul { padding-left: 32px; }
ul { list-style-type: disc; }
ol { list-style-type: decimal; }
li { margin-bottom: 0.5em; }

code, pre {
  margin-bottom: 30px;
  font-family: Courier, Monaco, Terminal, monospace, Consolas, Inconsolata;
}
pre {
  color: #222;
  overflow: auto;
  font-size: 13px;
  padding: 16px 2px;
  text-shadow: none;
  background: #fff;
  border: solid 1px #f2f2f2;
}
code {
  color: #e96900;
  font-size: 14px;
  border-radius: 4px;
  background: #f8f8f8;
  word-wrap: break-word;
  border: solid 1px #dbe7f3;
}
pre code {
  border: 0;
  color: #2879d0;
  background: #fff;
  word-spacing: 0;
  letter-spacing: 0;
}

blockquote {
  display: block;
  padding: 15px 1rem;
  margin: 0;
  font-size: 0.9em;
  color: #819198;
  border-left: 6px solid #dce6f0;
  background: #f2f7fb;
  overflow: auto;
  word-wrap: normal;
  word-break: normal;
}
blockquote p { margin: 0; }

a {
  color: #1e6bb8;
  text-decoration: none;
  word-wrap: break-word;
  background-color: transparent;
}

b, strong { font-weight: 700; }
em, del { font-style: italic; }
strong em { font-weight: 700; }

hr {
  height: 1px;
  margin: 1.5rem 0;
  border: 0;
  border-top: 1px dashed #a5a5a5;
}

img {
  display: block;
  margin: 0 auto;
  max-width: 100%;
}

figcaption {
  margin-top: 10px;
  text-align: center;
  color: #999;
  font-size: 0.7em;
}

table {
  display: table;
  width: 100%;
  text-align: left;
}
tbody { border: 0; }
table tr {
  border: 0;
  border-top: 1px solid #ccc;
  background-color: #fff;
}
table tr td,
table tr th {
  font-size: 1em;
  border: 1px solid #ccc;
  padding: 0.5em 1em;
  text-align: left;
}
table tr th {
  font-weight: 700;
  background-color: #f0f0f0;
}

.sr-only {
  position: absolute !important;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  clip-path: inset(50%);
  white-space: nowrap;
  border: 0;
}

.clearfix:after {
  display: block;
  content: "";
  clear: both;
}

.container {
  position: relative;
  margin: 0 auto;
}

/* ---------- 2. 页面骨架 ---------- */
header {
  display: block;
  padding-top: 40px;
  padding-bottom: 40px;
  background: #373834 0 0 repeat-x;
  border-bottom: solid 1px #275da1;
}
header h1 {
  width: 540px;
  margin: 0 0 0.2em;
  font-size: 72px;
  font-weight: 400;
  line-height: 1;
  color: #fff;
  letter-spacing: -1px;
  font-family: STXinwei, Helvetica, Arial, serif;
}
header h2 {
  width: 540px;
  margin: 0;
  font-size: 26px;
  font-weight: 400;
  line-height: 1.3;
  color: #9ddcff;
  letter-spacing: 0;
  font-family: STXinwei, Helvetica, Arial, serif;
}
header .header-mobile { display: none; }

.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 6;
  background: #373834 0 0 repeat-x;
  border-bottom: solid 1px #275da1;
}
.header .site {
  float: left;
  font-size: 28px;
  font-weight: 700;
  line-height: 52px;
  font-family: STXinwei, Helvetica, Arial, serif;
  color: #fff;
}

#content-wrap {
  margin-top: 30px;
  margin-bottom: 20px;
  min-height: calc(100vh - 310px);
}
#content-wrapper {
  margin-top: 80px;
  margin-bottom: 20px;
  min-height: calc(100vh - 160px);
}

#main-content { float: left; }
#main-content img {
  display: block;
  margin: 0 auto;
  max-width: 100%;
}
#art-title {
  display: block;
  text-align: center;
  margin: 0 0 30px 0;
  padding-bottom: 15px;
  border-bottom: 1px dashed #000;
  font-family: Courier, Helvetica, Arial, serif;
}

aside#sidebar {
  float: right;
  font-size: 14px;
  line-height: 1.3;
  background: transparent 0 0 no-repeat;
}
aside#sidebar blockquote {
  padding: 0 0 0 10px;
  margin: 15px 0;
  font-size: 15px;
  background: #fafafa;
  border-left: 10px solid #e9e9e9;
}
aside#sidebar a.button {
  display: block;
  color: #fff;
  height: 38px;
  padding-top: 16px;
  padding-left: 48px;
  background: transparent 0 0 no-repeat;
}

.footer {
  font-size: 13px;
  background-color: #fff;
  border-top: 1px solid #f1f1f1;
  padding: 16px;
  color: #8c8c8c;
}
.footer a { color: #8c8c8c; }
.footer a:hover { color: #2879d0; }
.footer .copy { float: left; line-height: 25px; }
.footer .link { float: right; }
.footer .link a {
  display: inline;
  border-radius: 20%;
  margin-left: 10px;
  text-align: center;
  line-height: 24px;
  opacity: 0.9;
  transition: 0.3s;
}

/* ---------- 3. 头部导航 ---------- */
.header-menu {
  float: left;
  margin-left: 5px;
  font-size: 16px;
}
.header-menu li,
.header-menu ul {
  list-style: none;
  padding: 0;
  margin: 0;
}
.header-menu > ul > li {
  float: left;
  margin-left: 40px;
  position: relative;
}
.header-menu > ul > li a {
  display: block;
  line-height: 52px;
  padding: 0 12px;
}
.header-menu a {
  font-size: 16px;
  font-weight: 500;
  font-family: "Microsoft YaHei", "思源黑体", "Arial", sans-serif;
  letter-spacing: 0.5px;
  transition: color 0.2s ease, opacity 0.2s ease;
}
.header-menu a:hover {
  color: #9ddcff;
  opacity: 0.85;
}
.header-menu li.current-menu-item a {
  font-weight: 700;
}

/* ---------- 4. 内容区：nav-list / nav-item ---------- */
.nav-cell {
  margin-bottom: 20px;
  contain-intrinsic-size: auto 560px;
  content-visibility: auto;
}
body.site-page[data-surface="liquid"] .nav-cell {
  content-visibility: visible;
}
.nav-cell h2 {
  font-size: 16px;
  color: #3b2c28;
  margin-bottom: 5px;
  font-weight: 400;
  line-height: 22px;
}

.nav-list,
.nav-list-art {
  margin-left: -10px;
  margin-right: -10px;
  list-style: none;
  padding: 0;
}
.nav-list {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
}
.nav-list li {
  box-sizing: border-box;
  padding: 10px;
}
.nav-list-art li {
  box-sizing: border-box;
  width: 50%;
  padding: 10px;
  float: left;
}

.nav-item {
  display: block;
  padding: 15px;
  border-radius: 15px;
  border: 1px solid transparent;
  transform: translateY(0);
  transition: all 0.3s ease;
}
.nav-item:hover {
  transform: translateY(-3px);
}
.nav-item:hover .nav-name {
  color: #ff7349;
}
.nav-item:focus-visible {
  outline: 2px solid #2188ff;
  outline-offset: 3px;
}
.nav-item .nav-img {
  float: left;
  width: 35px;
  height: 35px;
  border-radius: 20%;
  margin-right: 10px;
  object-fit: contain;
  background-size: contain;
  background-repeat: no-repeat;
  background-position: center;
}
.nav-item .nav-name {
  font-size: 15px;
  color: #3b2c28;
  font-weight: 700;
  line-height: 35px;
  height: 35px;
  overflow: hidden;
  display: -webkit-box;
  -webkit-line-clamp: 1;
  -webkit-box-orient: vertical;
  transition: 0.3s;
}
.nav-item p {
  font-size: 12px;
  color: #8c8c8c;
  line-height: 20px;
  margin: 0;
  overflow: hidden;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
}
.nav-item.has-description .nav-img {
  margin-bottom: 40px;
}
.nav-item:not(.has-description) .nav-img {
  margin-bottom: 10px;
}

.nav-cell .nav-section-title {
  display: flex;
  align-items: center;
  justify-content: flex-start;
  width: 100%;
  min-height: 42px;
  max-width: 100%;
  color: #3b2c28;
  font-size: 16px;
  font-weight: 700;
  line-height: 1.35;
  margin: 0 0 10px;
  padding: 9px 14px;
  border: 1px solid transparent;
  border-radius: 12px;
  text-align: left;
  background: transparent;
  box-sizing: border-box;
  transform: translateY(0);
  transition: all 0.3s ease;
  word-break: break-word;
}
.nav-cell .nav-section-title::before {
  content: none;
}
body.site-page .nav-section-title {
  border-color: var(--card-border);
  background: var(--card-final-bg);
  backdrop-filter: var(--surface-blur);
  -webkit-backdrop-filter: var(--surface-blur);
}
body.site-page .nav-section-title::before {
  content: none;
}
body.site-page .nav-section-title:hover {
  box-shadow: var(--card-shadow);
  transform: translateY(-2px);
}
body.site-page[data-surface="pixel"] .nav-section-title {
  border-radius: 0;
  box-shadow:
    0 -2px 0 0 #fcd34d,
    0 2px 0 0 #fcd34d,
    -2px 0 0 0 #fcd34d,
    2px 0 0 0 #fcd34d;
  font-family: "Courier New", "宋体", monospace;
}
body.site-page[data-surface="pixel"] .nav-section-title::before {
  content: none;
}

/* ---------- 5. 搜索区与搜索引擎面板 ---------- */
.sousuo { padding: 350px 0 80px 0; }
.search-section { padding-bottom: 40px; }

.search {
  position: relative;
  width: 100%;
  margin: 0 auto;
}

.search-box {
  position: relative;
  border-radius: 10px;
  overflow: hidden;
  border: 1px solid transparent;
  transition: all 0.3s ease;
}
.search-box:hover,
.search-box:focus-within {
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.08);
  transform: translateY(-2px);
}

.search-icon {
  width: 25px;
  cursor: pointer;
}

.search-input {
  width: calc(100% - 55px);
  height: 50px;
  line-height: 50px;
  font-size: 16px;
  color: #999;
  border: none;
  outline: 0;
  padding-left: 55px;
  background: transparent;
  box-shadow: none;
}
.search-input:focus {
  outline: 0;
  box-shadow: none;
}
input::-webkit-input-placeholder {
  font-size: 12px;
  letter-spacing: 1px;
  color: #ccc;
}

.search-btn {
  position: absolute;
  right: 0;
  top: 12px;
  width: 50px;
  line-height: 48px;
  background: 0 0;
  border: none;
  font-size: 25px;
  color: #ddd;
  font-weight: 700;
  outline: 0;
  padding: 0 10px;
  cursor: pointer;
}
.search-btn img {
  width: 25px;
  height: 25px;
}

.search-engine-toggle {
  position: absolute;
  left: 0;
  top: 0;
  z-index: 2;
  width: 55px;
  height: 52px;
  border: 0;
  background: transparent;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0;
}
.search-engine-toggle .search-icon {
  position: static;
  width: 25px;
  height: 25px;
  margin: 0;
  cursor: pointer;
}

.search-engine {
  position: absolute;
  top: 60px;
  left: 0;
  width: 100%;
  padding: 15px 0 0 0;
  border-radius: 5px;
  z-index: 999;
  transition: all 0.3s ease;
  border: 1px solid transparent;
  /* 收纳内部 float 选项，避免面板高度塌陷导致背景/命中区与选项错位 */
  display: flow-root;
}
.search-engine[hidden] {
  display: none !important;
}
.search-engine:not([hidden]) {
  display: flow-root;
}

.search-engine-list {
  margin: 0;
  padding: 0 0 0 15px;
  /* 包含 float 子项，保证列表高度撑开面板 */
  display: flow-root;
}
.search-engine-list::after {
  content: "";
  width: 100%;
  height: 20px;
  position: absolute;
  top: -20px;
  left: 1px;
}
.search-engine-list li {
  float: left;
  width: 30%;
  padding: 0;
  margin: 0 10px 10px 0;
  list-style-type: none;
}

.search-engine-option {
  width: 100%;
  min-height: 34px;
  display: flex;
  align-items: center;
  gap: 5px;
  border: 0;
  border-radius: 8px;
  cursor: pointer;
  transition: all 0.3s ease;
  font: inherit;
  font-size: 14px;
  text-align: left;
  padding: 5px 10px;
}
.search-engine-option:hover,
.search-engine-option:focus-visible {
  box-shadow: 0 0 5px rgba(0, 0, 0, 0.15);
  outline: none;
}
.search-engine-option img {
  float: none;
  width: 25px;
  height: 25px;
  border-radius: 15px;
  margin: 0;
}

/* ---------- 6. 偏好面板 ---------- */
.site-preferences {
  float: right;
  position: relative;
  height: 52px;
  display: flex;
  align-items: center;
}
.site-preferences.is-open {
  z-index: 40;
}

.preference-toggle {
  position: relative;
  z-index: 33;
  width: 38px;
  min-width: 38px;
  height: 34px;
  border: 1px solid var(--control-border);
  border-radius: 10px;
  background: var(--control-bg);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font: inherit;
  font-size: 14px;
  padding: 0;
  transition: all 0.2s ease;
}
.preference-toggle:hover,
.preference-toggle:focus-visible {
  background: var(--control-active-bg);
  outline: none;
}

.preference-toggle-icon {
  width: 18px;
  height: 18px;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.8;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.preference-backdrop {
  position: fixed;
  z-index: 21;
  border-radius: 10px;
  background: transparent;
  pointer-events: none;
}
.preference-backdrop[hidden] {
  display: none !important;
}

.preference-panel {
  position: fixed;
  top: 48px;
  right: auto;
  z-index: 32;
  width: min(340px, calc(100vw - 24px));
  max-height: min(84vh, 760px);
  padding: 12px;
  border: 1px solid var(--liquid-edge, var(--card-border));
  border-radius: 10px;
  box-shadow: var(--card-shadow);
  overflow-y: auto;
  text-align: left;
}
.preference-panel[hidden] {
  display: none !important;
}

.preference-group + .preference-group {
  margin-top: 10px;
}
.preference-advanced {
  margin-top: 8px;
  padding-top: 4px;
  border-top: 1px solid var(--control-border);
}
.preference-advanced-summary {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 20px;
  color: var(--header-text);
  cursor: pointer;
  list-style: none;
}
.preference-advanced-summary::-webkit-details-marker {
  display: none;
}
.preference-advanced-summary::marker {
  content: "";
}
.preference-advanced-summary:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}
.preference-advanced-indicator {
  width: 0;
  height: 0;
  border-right: 5px solid transparent;
  border-left: 5px solid transparent;
  border-top: 6px solid currentColor;
  opacity: 0.72;
  transition: transform 0.18s ease, opacity 0.18s ease;
}
.preference-advanced-summary:hover .preference-advanced-indicator,
.preference-advanced-summary:focus-visible .preference-advanced-indicator {
  opacity: 1;
}
.preference-advanced[open] .preference-advanced-indicator {
  transform: rotate(180deg);
}
.preference-advanced-content {
  margin-top: 8px;
}
.preference-label {
  display: block;
  margin-bottom: 6px;
  font-size: 12px;
  line-height: 1.4;
}

.segmented-control {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 4px;
  padding: 3px;
  border: 1px solid var(--control-border);
  border-radius: 8px;
  background: var(--control-bg);
}
.preference-group[data-preference-group="surface"] .segmented-control {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}
.preference-group[data-preference-group="themeBackgroundPriority"] .segmented-control,
.preference-group[data-preference-group="textContrast"] .segmented-control {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}
.preference-group[data-preference-group="textContrastMethod"] .segmented-control {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.segmented-option {
  min-height: 30px;
  border: 0;
  border-radius: 6px;
  background: transparent;
  cursor: pointer;
  font: inherit;
  font-size: 13px;
  transition: all 0.2s ease;
}
.segmented-option.is-active {
  color: var(--accent) !important;
  background: var(--control-active-bg);
  box-shadow: 0 1px 4px rgba(0, 0, 0, 0.08);
}
.segmented-option:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 1px;
}

.text-color-action-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  margin-bottom: 8px;
}
.text-color-default,
.text-shadow-toggle,
.text-bold-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 30px;
  padding: 0 10px;
  border: 1px solid var(--control-border);
  border-radius: 7px;
  background: var(--control-bg);
  color: var(--header-text);
  cursor: pointer;
  font: inherit;
  font-size: 13px;
  transition: background 0.2s ease, color 0.2s ease, box-shadow 0.2s ease;
}
.text-color-actions {
  display: inline-flex;
  flex: 0 0 auto;
  align-items: center;
  gap: 6px;
}
.text-color-default.is-active,
.text-shadow-toggle.is-active,
.text-bold-toggle.is-active {
  color: var(--accent);
  background: var(--control-active-bg);
  box-shadow: 0 1px 4px rgba(0, 0, 0, 0.08);
}
.text-shadow-toggle,
.text-bold-toggle {
  min-width: 48px;
}
.text-bold-toggle {
  font-weight: 700;
}
.text-color-default:focus-visible,
.text-shadow-toggle:focus-visible,
.text-bold-toggle:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 1px;
}
.text-color-palette {
  display: grid;
  grid-template-columns: repeat(6, minmax(0, 1fr));
  gap: 6px;
  margin-bottom: 8px;
}
.text-color-swatch {
  position: relative;
  aspect-ratio: 1;
  min-width: 0;
  border: 1px solid var(--control-border);
  border-radius: 7px;
  background:
    linear-gradient(135deg, rgba(255, 255, 255, 0.24), rgba(255, 255, 255, 0) 48%),
    var(--swatch-color);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.24);
  cursor: pointer;
}
.text-color-swatch::after {
  content: "";
  position: absolute;
  inset: -4px;
  border: 2px solid var(--accent);
  border-radius: 10px;
  box-shadow:
    0 0 0 1px var(--control-active-bg),
    0 2px 8px rgba(15, 23, 42, 0.18);
  opacity: 0;
  transform: scale(0.92);
  transition: opacity 0.16s ease, transform 0.16s ease;
  pointer-events: none;
}
.text-color-swatch.is-active::after {
  opacity: 1;
  transform: scale(1);
}
.text-color-swatch:disabled,
.text-color-input:disabled,
.preference-reset:disabled,
.preference-range:disabled {
  cursor: not-allowed;
  opacity: 0.48;
}
.text-color-input-row {
  display: grid;
  grid-template-columns: 30px minmax(0, 1fr);
  gap: 8px;
  align-items: center;
}
.text-color-preview {
  display: block;
  width: 30px;
  height: 30px;
  border: 1px solid var(--control-border);
  border-radius: 7px;
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.24),
    0 1px 4px rgba(15, 23, 42, 0.12);
}
.text-color-input {
  min-width: 0;
  height: 30px;
  padding: 0 10px;
  border: 1px solid var(--control-border);
  border-radius: 7px;
  background: var(--control-bg);
  color: var(--header-text);
  font: inherit;
  font-size: 13px;
  letter-spacing: 0;
  outline: none;
  transition: border-color 0.16s ease, box-shadow 0.16s ease;
}
.text-color-input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--accent) 18%, transparent);
}
.text-color-input.is-invalid {
  border-color: #dc2626;
  box-shadow: 0 0 0 3px rgba(220, 38, 38, 0.14);
}
.preference-group.is-paused .text-color-default,
.preference-group.is-paused .preference-label-row,
.preference-group.is-paused .text-color-input-row,
.preference-group.is-paused .text-color-palette {
  opacity: 0.72;
}

.preference-label-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  margin-bottom: 8px;
}
.preference-label-row .preference-label {
  margin-bottom: 0;
}
.preference-label-actions {
  display: inline-flex;
  flex: 0 0 auto;
  align-items: center;
  gap: 6px;
}
.preference-value {
  flex: 0 0 auto;
  font-size: 12px;
  line-height: 1.4;
  color: var(--header-text);
  opacity: 0.72;
}
.preference-reset {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 38px;
  height: 24px;
  padding: 0 8px;
  border: 1px solid var(--control-border);
  border-radius: 6px;
  background: var(--control-bg);
  color: var(--header-text);
  cursor: pointer;
  font: inherit;
  font-size: 12px;
  line-height: 1;
  transition: background 0.16s ease, color 0.16s ease, box-shadow 0.16s ease;
}
.preference-reset.is-active {
  color: var(--accent);
  background: var(--control-active-bg);
  box-shadow: 0 1px 4px rgba(0, 0, 0, 0.08);
}
.preference-reset:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 1px;
}
.preference-range {
  --range-progress: 0%;
  -webkit-appearance: none;
  appearance: none;
  width: 100%;
  height: 24px;
  margin: 0;
  background: transparent;
  cursor: pointer;
}
.preference-range:focus-visible {
  outline: none;
}
.preference-range::-webkit-slider-runnable-track {
  height: 8px;
  border: 1px solid var(--control-border);
  border-radius: 999px;
  background:
    linear-gradient(90deg, var(--accent) 0 var(--range-progress), transparent var(--range-progress) 100%),
    var(--control-bg);
  box-shadow: inset 0 1px 2px rgba(15, 23, 42, 0.12);
}
.preference-range::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 18px;
  height: 18px;
  margin-top: -6px;
  border: 2px solid var(--control-active-bg);
  border-radius: 50%;
  background: var(--accent);
  box-shadow:
    0 2px 7px rgba(15, 23, 42, 0.24),
    0 0 0 1px rgba(15, 23, 42, 0.08);
  transition: transform 0.16s ease, box-shadow 0.16s ease;
}
.preference-range::-moz-range-track {
  height: 8px;
  border: 1px solid var(--control-border);
  border-radius: 999px;
  background: var(--control-bg);
  box-shadow: inset 0 1px 2px rgba(15, 23, 42, 0.12);
}
.preference-range::-moz-range-progress {
  height: 8px;
  border-radius: 999px;
  background: var(--accent);
}
.preference-range::-moz-range-thumb {
  width: 18px;
  height: 18px;
  border: 2px solid var(--control-active-bg);
  border-radius: 50%;
  background: var(--accent);
  box-shadow:
    0 2px 7px rgba(15, 23, 42, 0.24),
    0 0 0 1px rgba(15, 23, 42, 0.08);
  transition: transform 0.16s ease, box-shadow 0.16s ease;
}
.preference-range:hover::-webkit-slider-thumb,
.preference-range:focus-visible::-webkit-slider-thumb {
  transform: scale(1.08);
  box-shadow:
    0 3px 10px rgba(15, 23, 42, 0.3),
    0 0 0 5px color-mix(in srgb, var(--accent) 20%, transparent);
}
.preference-range:hover::-moz-range-thumb,
.preference-range:focus-visible::-moz-range-thumb {
  transform: scale(1.08);
  box-shadow:
    0 3px 10px rgba(15, 23, 42, 0.3),
    0 0 0 5px color-mix(in srgb, var(--accent) 20%, transparent);
}

/* ---------- 7. 自绘滚动条 ----------
 * 整页：隐藏系统滚动条（Windows 会强制白底轨道），改用右侧悬浮滑块 .site-scrollbar。
 * 内部容器：仍用 CSS 细滑块，轨道强制透明、无白底。
 */
body.site-page {
  --scrollbar-size: 10px;
  /* 滑块中性加深；轨道由 JS 对整条背后做一次平均明度取反后写入 --scrollbar-track-solid */
  --scrollbar-thumb: color-mix(in srgb, var(--header-text, #333) 72%, transparent);
  --scrollbar-thumb-hover: color-mix(in srgb, var(--header-text, #333) 86%, transparent);
  --scrollbar-thumb-active: color-mix(in srgb, var(--header-text, #333) 96%, transparent);
  --scrollbar-track-solid: color-mix(in srgb, var(--header-text, #333) 14%, transparent);
}

body.site-page[data-theme="dark"] {
  --scrollbar-thumb: color-mix(in srgb, var(--header-text, #e2e8f0) 70%, transparent);
  --scrollbar-thumb-hover: color-mix(in srgb, var(--header-text, #e2e8f0) 84%, transparent);
  --scrollbar-thumb-active: color-mix(in srgb, #fff 92%, transparent);
  --scrollbar-track-solid: color-mix(in srgb, #000 28%, transparent);
}

/* 整页：彻底去掉系统滚动条及其白底槽 */
html:has(body.site-page) {
  scrollbar-width: none;
}
html:has(body.site-page)::-webkit-scrollbar {
  width: 0 !important;
  height: 0 !important;
  display: none;
  background: transparent;
}

/* 内部可滚动区：细滑块 + 全透明轨道（含 scrollbar 本体，避免 WebKit 白底） */
body.site-page * {
  scrollbar-width: thin;
  scrollbar-color: var(--scrollbar-thumb) transparent;
}

body.site-page *::-webkit-scrollbar {
  width: var(--scrollbar-size);
  height: var(--scrollbar-size);
  background: transparent;
  background-color: transparent;
}

body.site-page *::-webkit-scrollbar-button {
  display: none;
  width: 0;
  height: 0;
  background: transparent;
}

body.site-page *::-webkit-scrollbar-track,
body.site-page *::-webkit-scrollbar-track-piece {
  background: transparent !important;
  background-color: transparent !important;
  border: none;
  box-shadow: none;
}

body.site-page *::-webkit-scrollbar-thumb {
  background-color: var(--scrollbar-thumb);
  border-radius: 999px;
  border: 2px solid transparent;
  background-clip: padding-box;
  box-shadow: none;
  min-height: 36px;
  min-width: 36px;
}

body.site-page *::-webkit-scrollbar-thumb:hover {
  background-color: var(--scrollbar-thumb-hover);
  border-width: 1px;
}

body.site-page *::-webkit-scrollbar-thumb:active {
  background-color: var(--scrollbar-thumb-active);
  border-width: 1px;
}

body.site-page *::-webkit-scrollbar-corner {
  background: transparent;
}

/* 整页悬浮滑块：常显、无发光。
 * 轨道：整条平均明度（不取反）。
 * 滑块：取反但压缩明度带 + 透明度阶梯，给悬停/按下激发态留空间，避免死黑。
 */
.site-scrollbar {
  position: fixed;
  top: 8px;
  right: 3px;
  bottom: 8px;
  width: 12px;
  z-index: 40;
  pointer-events: auto;
  opacity: 1;
  border-radius: 999px;
  background: var(--scrollbar-track-solid, color-mix(in srgb, #333 14%, transparent));
  overflow: hidden;
  transition: background-color 0.2s ease;
}
.site-scrollbar[hidden] {
  display: none !important;
}
.site-scrollbar__thumb {
  position: absolute;
  top: 0;
  left: 2px;
  right: 2px;
  z-index: 1;
  width: auto;
  min-height: 36px;
  border-radius: 999px;
  border: 0;
  pointer-events: auto;
  cursor: grab;
  background: var(--scrollbar-thumb, color-mix(in srgb, #333 72%, transparent));
  box-shadow: none;
  transition: background-color 0.16s ease;
  touch-action: none;
  will-change: transform, height;
  box-sizing: border-box;
}
.site-scrollbar__thumb:hover {
  background: var(--scrollbar-thumb-hover, color-mix(in srgb, #333 86%, transparent));
}
.site-scrollbar.is-dragging .site-scrollbar__thumb,
.site-scrollbar__thumb:active {
  background: var(--scrollbar-thumb-active, color-mix(in srgb, #333 96%, transparent));
  cursor: grabbing;
}

@media (prefers-reduced-motion: reduce) {
  .site-scrollbar,
  .site-scrollbar__thumb {
    transition: none;
  }
}

/* 设置面板：略加宽，小浮层更好拖 */
body.site-page .preference-panel {
  --scrollbar-size: 9px;
}

/* ---------- 8. 主题变量（默认 = 浅色 + 毛玻璃 + 宽松） ---------- */
body.site-page {
  --page-bg: rgb(246, 248, 249);
  --background-dim: transparent;
  --site-background-image: none;
  --site-style-background:
    linear-gradient(rgba(255, 255, 255, 0.64) 1px, transparent 1px),
    linear-gradient(90deg, rgba(59, 130, 246, 0.08) 1px, transparent 1px),
    linear-gradient(135deg, #f6f8f9 0%, #e8f0f7 46%, #ffffff 100%);
  --site-style-background-size: 48px 48px, 48px 48px, cover;
  --site-style-background-position: center, center, center;
  --site-style-background-repeat: repeat, repeat, no-repeat;
  --site-background-blur: 0px;
  --site-background-scale: 1;
  --header-bg: rgba(255, 255, 255, 0.5);
  --header-border: rgba(255, 255, 255, 0.4);
  --header-text-base: #333;
  --header-text: var(--header-text-base);
  --accent: #007bff;
  --card-bg: rgba(255, 255, 255, 0.25);
  --card-bg-strong: rgba(255, 255, 255, 0.45);
  --card-opacity-base: 100%;
  --card-layer-base: 100%;
  --card-layer-opacity: 1;
  --card-opacity-color: #fff;
  --card-strong-opacity-color: #fff;
  --panel-opacity-color: #fff;
  --header-opacity-color: var(--card-opacity-color);
  --card-opacity-target: transparent;
  --card-strong-opacity-target: transparent;
  --panel-opacity-target: transparent;
  --header-opacity-target: transparent;
  --card-brightness-base: 100%;
  --card-brightness-color: #fff;
  --card-adjusted-bg: color-mix(in srgb, var(--card-bg) var(--card-brightness-base), var(--card-brightness-color));
  --card-strong-adjusted-bg: color-mix(in srgb, var(--card-bg-strong) var(--card-brightness-base), var(--card-brightness-color));
  --panel-adjusted-bg: color-mix(in srgb, var(--panel-bg, var(--card-bg)) var(--card-brightness-base), var(--card-brightness-color));
  --header-adjusted-bg: color-mix(in srgb, var(--header-bg) var(--card-brightness-base), var(--card-brightness-color));
  --card-opaque-bg: color-mix(in srgb, var(--card-opacity-color) var(--card-brightness-base), var(--card-brightness-color));
  --card-strong-opaque-bg: color-mix(in srgb, var(--card-strong-opacity-color) var(--card-brightness-base), var(--card-brightness-color));
  --panel-opaque-bg: color-mix(in srgb, var(--panel-opacity-color) var(--card-brightness-base), var(--card-brightness-color));
  --header-opaque-bg: color-mix(in srgb, var(--header-opacity-color) var(--card-brightness-base), var(--card-brightness-color));
  --card-stacked-bg: color-mix(in srgb, var(--card-adjusted-bg) 72%, var(--card-opaque-bg));
  --card-strong-stacked-bg: color-mix(in srgb, var(--card-strong-adjusted-bg) 72%, var(--card-strong-opaque-bg));
  --panel-stacked-bg: color-mix(in srgb, var(--panel-adjusted-bg) 72%, var(--panel-opaque-bg));
  --header-stacked-bg: color-mix(in srgb, var(--header-adjusted-bg) 72%, var(--header-opaque-bg));
  --card-layer-bg: color-mix(in srgb, var(--card-adjusted-bg) var(--card-layer-base), transparent);
  --card-strong-layer-bg: color-mix(in srgb, var(--card-strong-adjusted-bg) var(--card-layer-base), transparent);
  --panel-layer-bg: color-mix(in srgb, var(--panel-adjusted-bg) var(--card-layer-base), transparent);
  --card-final-bg: color-mix(in srgb, var(--card-layer-bg) var(--card-opacity-base), var(--card-opacity-target));
  --card-strong-final-bg: color-mix(in srgb, var(--card-strong-layer-bg) var(--card-opacity-base), var(--card-strong-opacity-target));
  --panel-final-bg: color-mix(in srgb, var(--panel-layer-bg) var(--card-opacity-base), var(--panel-opacity-target));
  --header-layer-bg: color-mix(in srgb, var(--header-adjusted-bg) var(--card-layer-base), transparent);
  --header-final-bg: color-mix(in srgb, var(--header-layer-bg) var(--card-opacity-base), var(--header-opacity-target));
  --header-border-final: color-mix(in srgb, var(--header-border) var(--card-layer-base), transparent);
  --card-border: rgba(255, 255, 255, 0.3);
  --card-shadow: 0 1px 6px 1px rgba(0, 0, 0, 0.03);
  --title-color-base: #3b2c28;
  --text-muted-base: #8c8c8c;
  --title-color: var(--title-color-base);
  --text-muted: var(--text-muted-base);
  --panel-bg: rgba(255, 255, 255, 0.5);
  --control-bg: rgba(255, 255, 255, 0.3);
  --control-active-bg: #fff;
  --control-border: rgba(0, 0, 0, 0.08);
  --surface-blur: blur(16px) saturate(220%) brightness(1.08);
  --surface-sheen: rgba(255, 255, 255, 0.36);
  --surface-rim: rgba(255, 255, 255, 0.42);

  background-color: var(--page-bg);
  background-position: center center;
  background-repeat: no-repeat;
  background-attachment: fixed;
  background-size: cover;
  text-align: center;
  font-family: "Segoe UI", "Roboto", "Microsoft YaHei", sans-serif;
  overflow-x: hidden;
}

body.site-page::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background-image:
    linear-gradient(var(--background-dim), var(--background-dim)),
    var(--site-background-image),
    var(--site-style-background);
  background-position: center, center, var(--site-style-background-position);
  background-repeat: no-repeat, no-repeat, var(--site-style-background-repeat);
  background-size: cover, cover, var(--site-style-background-size);
  filter: blur(var(--site-background-blur));
  transform: scale(var(--site-background-scale));
  transition: background 0.2s ease, filter 0.2s ease, transform 0.2s ease;
}

body.site-page > main,
body.site-page > #content-wrapper {
  position: relative;
  z-index: 1;
}

body.site-page[data-card-opacity-direction="stacked"] {
  --card-opacity-target: var(--card-stacked-bg);
  --card-strong-opacity-target: var(--card-strong-stacked-bg);
  --panel-opacity-target: var(--panel-stacked-bg);
  --header-opacity-target: var(--header-stacked-bg);
}

/* ---------- 9. 主题与质感重载 ---------- */
/* 深色主题 */
body.site-page[data-theme="dark"] {
  --page-bg: #0f172a;
  --background-dim: rgba(2, 6, 23, 0.52);
  --site-style-background: linear-gradient(135deg, #020617 0%, #111827 46%, #0f172a 100%);
  --site-style-background-size: cover;
  --site-style-background-position: center;
  --site-style-background-repeat: no-repeat;
  --header-bg: rgba(15, 23, 42, 0.6);
  --header-border: rgba(148, 163, 184, 0.28);
  --header-text-base: #e5e7eb;
  --accent: #60a5fa;
  --card-bg: rgba(15, 23, 42, 0.28);
  --card-bg-strong: rgba(30, 41, 59, 0.48);
  --card-opacity-color: #0f172a;
  --card-strong-opacity-color: #1e293b;
  --panel-opacity-color: #0f172a;
  --card-border: rgba(148, 163, 184, 0.24);
  --card-shadow: 0 12px 28px rgba(0, 0, 0, 0.24);
  --title-color-base: #e5e7eb;
  --text-muted-base: #cbd5e1;
  --panel-bg: rgba(15, 23, 42, 0.55);
  --control-bg: rgba(30, 41, 59, 0.4);
  --control-active-bg: rgba(96, 165, 250, 0.24);
  --control-border: rgba(148, 163, 184, 0.28);
  --surface-blur: blur(16px) saturate(200%) brightness(0.95);
  --surface-sheen: rgba(255, 255, 255, 0.1);
  --surface-rim: rgba(226, 232, 240, 0.18);
  color-scheme: dark;
}

/* 毛玻璃：显式 token，与全局默认对齐，避免 glass 隐式依赖 body 默认值。
   改默认皮肤时只需同步这里，不会误伤「毛玻璃」语义。 */
body.site-page[data-surface="glass"] {
  --header-bg: rgba(255, 255, 255, 0.5);
  --header-border: rgba(255, 255, 255, 0.4);
  --card-bg: rgba(255, 255, 255, 0.25);
  --card-bg-strong: rgba(255, 255, 255, 0.45);
  --card-opacity-color: #fff;
  --card-strong-opacity-color: #fff;
  --panel-opacity-color: #fff;
  --card-border: rgba(255, 255, 255, 0.3);
  --card-shadow: 0 1px 6px 1px rgba(0, 0, 0, 0.03);
  --panel-bg: rgba(255, 255, 255, 0.5);
  --control-bg: rgba(255, 255, 255, 0.3);
  --control-active-bg: #fff;
  --control-border: rgba(0, 0, 0, 0.08);
  --surface-blur: blur(16px) saturate(220%) brightness(1.08);
  --surface-sheen: rgba(255, 255, 255, 0.36);
  --surface-rim: rgba(255, 255, 255, 0.42);
}
body.site-page[data-theme="dark"][data-surface="glass"] {
  --header-bg: rgba(15, 23, 42, 0.6);
  --header-border: rgba(148, 163, 184, 0.28);
  --card-bg: rgba(15, 23, 42, 0.28);
  --card-bg-strong: rgba(30, 41, 59, 0.48);
  --card-opacity-color: #0f172a;
  --card-strong-opacity-color: #1e293b;
  --panel-opacity-color: #0f172a;
  --card-border: rgba(148, 163, 184, 0.24);
  --card-shadow: 0 12px 28px rgba(0, 0, 0, 0.24);
  --panel-bg: rgba(15, 23, 42, 0.55);
  --control-bg: rgba(30, 41, 59, 0.4);
  --control-active-bg: rgba(96, 165, 250, 0.24);
  --control-border: rgba(148, 163, 184, 0.28);
  --surface-blur: blur(16px) saturate(200%) brightness(0.95);
  --surface-sheen: rgba(255, 255, 255, 0.1);
  --surface-rim: rgba(226, 232, 240, 0.18);
}

/* 简洁质感（无毛玻璃） */
body.site-page[data-surface="plain"] {
  --site-style-background:
    linear-gradient(rgba(15, 23, 42, 0.045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(15, 23, 42, 0.035) 1px, transparent 1px),
    linear-gradient(135deg, #f8fafc 0%, #eef2f7 55%, #ffffff 100%);
  --site-style-background-size: 64px 64px, 64px 64px, cover;
  --site-style-background-position: center, center, center;
  --site-style-background-repeat: repeat, repeat, no-repeat;
  --card-bg: #fff;
  --card-bg-strong: #fff;
  --card-opacity-color: #fff;
  --card-strong-opacity-color: #fff;
  --panel-opacity-color: #fff;
  --card-border: rgba(15, 23, 42, 0.1);
  --panel-bg: #fff;
  --control-bg: #f3f4f6;
  --control-active-bg: #fff;
  --surface-blur: none;
}
body.site-page[data-theme="dark"][data-surface="plain"] {
  --site-style-background:
    linear-gradient(rgba(148, 163, 184, 0.08) 1px, transparent 1px),
    linear-gradient(90deg, rgba(148, 163, 184, 0.06) 1px, transparent 1px),
    linear-gradient(135deg, #0b1120 0%, #111827 55%, #182235 100%);
  --site-style-background-size: 64px 64px, 64px 64px, cover;
  --site-style-background-position: center, center, center;
  --site-style-background-repeat: repeat, repeat, no-repeat;
  --card-bg: #111827;
  --card-bg-strong: #1f2937;
  --card-opacity-color: #111827;
  --card-strong-opacity-color: #1f2937;
  --panel-opacity-color: #111827;
  --card-border: rgba(148, 163, 184, 0.24);
  --panel-bg: #111827;
  --control-bg: #1f2937;
  --control-active-bg: #273449;
}

/* 亚克力（Fluent 近似）：厚磨砂 + 系统色染（soft-light 近似 luminosity 色染）+ 内描边。
   真 Win Acrylic 的 luminosity 合成在纯 CSS 里无法完整复刻；用 soft-light 色染层
   让壁纸明暗渗入 tint，同时保留板材厚度感。 */
body.site-page[data-surface="acrylic"] {
  --site-style-background:
    linear-gradient(118deg, rgba(255, 255, 255, 0.75), rgba(255, 255, 255, 0) 34%),
    linear-gradient(135deg, #dbeafe 0%, #f8fafc 38%, #e8eef8 68%, #e0f2fe 100%);
  --site-style-background-size: cover, cover;
  --site-style-background-position: center, center;
  --site-style-background-repeat: no-repeat, no-repeat;
  --header-bg: rgba(248, 250, 252, 0.62);
  --header-border: rgba(255, 255, 255, 0.54);
  --card-bg: rgba(248, 250, 252, 0.4);
  --card-bg-strong: rgba(255, 255, 255, 0.6);
  --card-opacity-color: #f8fafc;
  --card-strong-opacity-color: #fff;
  --panel-opacity-color: #f8fafc;
  --card-border: rgba(255, 255, 255, 0.48);
  --card-shadow: 0 16px 38px rgba(15, 23, 42, 0.1);
  --panel-bg: rgba(248, 250, 252, 0.66);
  --control-bg: rgba(255, 255, 255, 0.48);
  --control-active-bg: rgba(255, 255, 255, 0.88);
  --surface-blur: blur(20px) saturate(175%) brightness(1.03);
  --surface-sheen: rgba(255, 255, 255, 0.42);
  --surface-rim: rgba(255, 255, 255, 0.5);
  --acrylic-tint: rgba(196, 214, 240, 0.55);
  --acrylic-tint-soft: rgba(232, 240, 252, 0.4);
  --acrylic-luminosity: soft-light;
}
body.site-page[data-theme="dark"][data-surface="acrylic"] {
  --site-style-background:
    linear-gradient(118deg, rgba(148, 163, 184, 0.16), rgba(15, 23, 42, 0) 36%),
    linear-gradient(135deg, #08111f 0%, #111827 42%, #1e293b 70%, #0f172a 100%);
  --site-style-background-size: cover, cover;
  --site-style-background-position: center, center;
  --site-style-background-repeat: no-repeat, no-repeat;
  --header-bg: rgba(15, 23, 42, 0.58);
  --header-border: rgba(148, 163, 184, 0.26);
  --card-bg: rgba(15, 23, 42, 0.4);
  --card-bg-strong: rgba(30, 41, 59, 0.58);
  --card-opacity-color: #0f172a;
  --card-strong-opacity-color: #1e293b;
  --panel-opacity-color: #0f172a;
  --card-border: rgba(148, 163, 184, 0.24);
  --card-shadow: 0 18px 42px rgba(0, 0, 0, 0.28);
  --panel-bg: rgba(15, 23, 42, 0.66);
  --control-bg: rgba(30, 41, 59, 0.52);
  --control-active-bg: rgba(96, 165, 250, 0.22);
  --surface-blur: blur(20px) saturate(150%) brightness(0.98);
  --surface-sheen: rgba(255, 255, 255, 0.12);
  --surface-rim: rgba(148, 163, 184, 0.22);
  --acrylic-tint: rgba(56, 80, 120, 0.45);
  --acrylic-tint-soft: rgba(30, 41, 59, 0.35);
  --acrylic-luminosity: soft-light;
}

/* 云母（Win11 Mica）：高 blur 糊掉壁纸细节 + 半透明系统底吃壁纸色温。
   native 渲染器保护材质层；阴影刻意放轻，保持「安静桌面」而不是悬浮卡。 */
body.site-page[data-surface="mica"] {
  --site-style-background:
    linear-gradient(100deg, rgba(226, 232, 240, 0.55), rgba(226, 232, 240, 0) 48%),
    linear-gradient(145deg, #eef2f7 0%, #d7e3f0 48%, #e8eef5 100%);
  --site-style-background-size: cover, cover;
  --site-style-background-position: center, center;
  --site-style-background-repeat: no-repeat, no-repeat;
  --header-bg: rgba(247, 249, 252, 0.58);
  --header-border: rgba(0, 0, 0, 0.06);
  --card-bg: rgba(247, 249, 252, 0.48);
  --card-bg-strong: rgba(252, 253, 255, 0.68);
  --card-opacity-color: #f7f9fc;
  --card-strong-opacity-color: #fcfdff;
  --panel-opacity-color: #f7f9fc;
  --card-border: rgba(0, 0, 0, 0.05);
  --card-shadow: 0 6px 18px rgba(15, 23, 42, 0.05), 0 1px 0 rgba(255, 255, 255, 0.55) inset;
  --panel-bg: rgba(247, 249, 252, 0.66);
  --control-bg: rgba(0, 0, 0, 0.04);
  --control-active-bg: rgba(255, 255, 255, 0.7);
  --control-border: rgba(0, 0, 0, 0.08);
  --surface-blur: blur(40px) saturate(118%);
  --mica-tint: rgba(226, 236, 248, 0.38);
  --mica-luminosity: luminosity;
}
body.site-page[data-theme="dark"][data-surface="mica"] {
  --site-style-background:
    linear-gradient(100deg, rgba(71, 85, 105, 0.32), rgba(15, 23, 42, 0) 48%),
    linear-gradient(145deg, #101827 0%, #1f2937 48%, #0f172a 100%);
  --site-style-background-size: cover, cover;
  --site-style-background-position: center, center;
  --site-style-background-repeat: no-repeat, no-repeat;
  --header-bg: rgba(35, 39, 52, 0.58);
  --header-border: rgba(255, 255, 255, 0.06);
  --card-bg: rgba(35, 39, 52, 0.48);
  --card-bg-strong: rgba(44, 49, 66, 0.68);
  --card-opacity-color: #232734;
  --card-strong-opacity-color: #2c3142;
  --panel-opacity-color: #232734;
  --card-border: rgba(255, 255, 255, 0.06);
  --card-shadow: 0 8px 22px rgba(0, 0, 0, 0.28), 0 1px 0 rgba(255, 255, 255, 0.04) inset;
  --panel-bg: rgba(35, 39, 52, 0.66);
  --control-bg: rgba(255, 255, 255, 0.06);
  --control-active-bg: rgba(255, 255, 255, 0.14);
  --surface-blur: blur(40px) saturate(112%);
  --mica-tint: rgba(60, 72, 96, 0.4);
  --mica-luminosity: luminosity;
}

/* 磨砂纸：完全不透明的米白色 + SVG 噪声纸纹。
   通过 background-image 叠加 SVG turbulence 噪声做颗粒。
   特点：不模糊、不透、有手工纸的颗粒感。 */
body.site-page[data-surface="paper"] {
  --site-style-background:
    repeating-linear-gradient(0deg, rgba(120, 100, 80, 0.035) 0 1px, transparent 1px 7px),
    linear-gradient(135deg, #f6f1e8 0%, #fbf6ec 56%, #efe4d0 100%);
  --site-style-background-size: auto, cover;
  --site-style-background-position: center, center;
  --site-style-background-repeat: repeat, no-repeat;
  --header-bg: #f6f1e8;
  --header-border: rgba(120, 100, 80, 0.16);
  --card-bg: #fbf6ec;
  --card-bg-strong: #fffaf0;
  --card-opacity-color: #fbf6ec;
  --card-strong-opacity-color: #fffaf0;
  --panel-opacity-color: #fbf6ec;
  --card-border: rgba(120, 100, 80, 0.12);
  --card-shadow: 0 1px 2px rgba(120, 100, 80, 0.08), 0 6px 14px -10px rgba(120, 100, 80, 0.16);
  --title-color-base: #3a2f24;
  --text-muted-base: #7a6a58;
  --panel-bg: #fbf6ec;
  --control-bg: #f1ead9;
  --control-active-bg: #fffaf0;
  --control-border: rgba(120, 100, 80, 0.18);
  --surface-blur: none;
}
body.site-page[data-theme="dark"][data-surface="paper"] {
  --site-style-background:
    repeating-linear-gradient(0deg, rgba(220, 200, 170, 0.045) 0 1px, transparent 1px 7px),
    linear-gradient(135deg, #2f281f 0%, #3a3328 58%, #211b16 100%);
  --site-style-background-size: auto, cover;
  --site-style-background-position: center, center;
  --site-style-background-repeat: repeat, no-repeat;
  --header-bg: #2e2820;
  --header-border: rgba(220, 200, 170, 0.16);
  --card-bg: #3a3328;
  --card-bg-strong: #46402f;
  --card-opacity-color: #3a3328;
  --card-strong-opacity-color: #46402f;
  --panel-opacity-color: #3a3328;
  --card-border: rgba(220, 200, 170, 0.14);
  --card-shadow: 0 1px 2px rgba(0, 0, 0, 0.4), 0 6px 14px -10px rgba(0, 0, 0, 0.5);
  --title-color-base: #f0e8d4;
  --text-muted-base: #c0b298;
  --panel-bg: #3a3328;
  --control-bg: #46402f;
  --control-active-bg: #564f3b;
  --control-border: rgba(220, 200, 170, 0.18);
  --surface-blur: none;
}

/* 黑曜石：参考真实黑曜石光泽（#1A1A1A 接近纯黑的灰），"polished volcanic glass"。
   纯黑底色 + 极轻微的冷蓝灰偏色 + 中度模糊 + 锐利冷调亮边。
   黑曜石属于"永远深色"质感，浅色主题下也维持深底色，所以不再单独 override 深色。 */
body.site-page[data-surface="obsidian"] {
  --site-style-background:
    linear-gradient(120deg, rgba(147, 197, 253, 0.12), transparent 28%),
    linear-gradient(145deg, #050608 0%, #15161b 42%, #050608 100%);
  --site-style-background-size: cover, cover;
  --site-style-background-position: center, center;
  --site-style-background-repeat: no-repeat, no-repeat;
  --header-bg: rgba(15, 16, 20, 0.78);
  --header-border: rgba(255, 255, 255, 0.08);
  --header-text-base: #f0f0f2;
  --accent: #93c5fd;
  --card-bg: rgba(18, 19, 24, 0.7);
  --card-bg-strong: rgba(28, 30, 36, 0.85);
  --card-opacity-color: #121318;
  --card-strong-opacity-color: #1c1e24;
  --panel-opacity-color: #0f1014;
  --card-border: rgba(255, 255, 255, 0.08);
  --card-shadow: 0 1px 2px rgba(0, 0, 0, 0.4), 0 12px 28px rgba(0, 0, 0, 0.5);
  --title-color-base: #f0f0f2;
  --text-muted-base: #a8a8ad;
  --panel-bg: rgba(15, 16, 20, 0.88);
  --control-bg: rgba(255, 255, 255, 0.05);
  --control-active-bg: rgba(255, 255, 255, 0.12);
  --control-border: rgba(255, 255, 255, 0.1);
  --surface-blur: blur(14px) saturate(110%);
  color-scheme: dark;
}

/* 液态玻璃 ─ 思路：单层底色 + 顶部高光 + 锐利白边 + 柔阴影；Chromium 另由 JS 做真折射 */
body.site-page[data-surface="liquid"] {
  --site-style-background:
    linear-gradient(115deg, rgba(255, 255, 255, 0.72), transparent 30%),
    linear-gradient(150deg, #dff6ff 0%, #eef2ff 34%, #fde2ff 66%, #dbeafe 100%);
  --site-style-background-size: cover, cover;
  --site-style-background-position: center, center;
  --site-style-background-repeat: no-repeat, no-repeat;
  --header-bg: rgba(255, 255, 255, 0.22);
  --header-border: rgba(255, 255, 255, 0.6);
  --card-bg: rgba(255, 255, 255, 0.18);
  --card-bg-strong: rgba(255, 255, 255, 0.32);
  --card-opacity-color: #fff;
  --card-strong-opacity-color: #fff;
  --panel-opacity-color: #fff;
  --card-border: rgba(255, 255, 255, 0.6);
  --card-shadow:
    0 1px 0 rgba(255, 255, 255, 0.7) inset,
    0 22px 50px -16px rgba(15, 23, 42, 0.22),
    0 6px 16px -8px rgba(15, 23, 42, 0.18);
  --panel-bg: rgba(255, 255, 255, 0.42);
  --control-bg: rgba(255, 255, 255, 0.28);
  --control-active-bg: rgba(255, 255, 255, 0.78);
  --surface-blur: blur(20px) saturate(170%) brightness(1.05);
  --liquid-edge: rgba(255, 255, 255, 0.78);
}
body.site-page[data-theme="dark"][data-surface="liquid"] {
  --site-style-background:
    linear-gradient(115deg, rgba(125, 211, 252, 0.16), transparent 32%),
    linear-gradient(150deg, #020617 0%, #172554 38%, #2e1065 68%, #0f172a 100%);
  --site-style-background-size: cover, cover;
  --site-style-background-position: center, center;
  --site-style-background-repeat: no-repeat, no-repeat;
  --header-bg: rgba(15, 23, 42, 0.42);
  --header-border: rgba(226, 232, 240, 0.28);
  --card-bg: rgba(15, 23, 42, 0.32);
  --card-bg-strong: rgba(30, 41, 59, 0.5);
  --card-opacity-color: #0f172a;
  --card-strong-opacity-color: #1e293b;
  --panel-opacity-color: #0f172a;
  --card-border: rgba(226, 232, 240, 0.32);
  --card-shadow:
    0 1px 0 rgba(255, 255, 255, 0.18) inset,
    0 24px 56px -16px rgba(0, 0, 0, 0.55),
    0 8px 18px -10px rgba(0, 0, 0, 0.45);
  --panel-bg: rgba(15, 23, 42, 0.6);
  --control-bg: rgba(30, 41, 59, 0.42);
  --control-active-bg: rgba(96, 165, 250, 0.28);
  --surface-blur: blur(20px) saturate(150%) brightness(0.98);
  --liquid-edge: rgba(255, 255, 255, 0.28);
}

/* 头部应用主题变量 */
body.site-page .header {
  background: var(--header-final-bg);
  border-bottom: 1px solid var(--header-border-final);
  box-shadow: 0 1px 0 var(--surface-rim), 0 12px 28px rgba(15, 23, 42, 0.08);
  isolation: isolate;
  z-index: 20;
  /* 默认启用 backdrop-filter，让顶栏有玻璃质感 */
  backdrop-filter: var(--surface-blur);
  -webkit-backdrop-filter: var(--surface-blur);
}
body.site-page.is-preference-panel-open .header {
  z-index: 22;
}
body.site-page .header::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background:
    linear-gradient(180deg, var(--surface-sheen), transparent 72%),
    linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.16), transparent);
  opacity: calc(0.72 * var(--card-layer-opacity, 1));
}
body.site-page .header .container {
  z-index: 1;
}
body.site-page .header .container::after {
  clear: both;
  content: "";
  display: block;
}
body.site-page[data-surface="plain"] .header {
  backdrop-filter: none;
  -webkit-backdrop-filter: none;
  box-shadow: 0 1px 0 var(--header-border-final);
}
body.site-page[data-surface="plain"] .header::before {
  display: none;
}

/* 毛玻璃模式：顶栏加强模糊 */
body.site-page[data-surface="glass"] .header {
  backdrop-filter: blur(16px) saturate(220%) brightness(108%);
  -webkit-backdrop-filter: blur(16px) saturate(220%) brightness(108%);
}

/* 毛玻璃：卡片增强多层次高光 */
body.site-page[data-surface="glass"] .nav-item,
body.site-page[data-surface="glass"] .search-box,
body.site-page[data-surface="glass"] .search-engine,
body.site-page[data-surface="glass"] .preference-panel,
body.site-page[data-surface="glass"] .preference-toggle,
body.site-page[data-surface="glass"] .segmented-control {
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.36),
    inset 1px 0 0 rgba(255, 255, 255, 0.12),
    inset -1px 0 0 rgba(255, 255, 255, 0.12),
    0 2px 8px rgba(15, 23, 42, 0.06),
    0 8px 24px rgba(15, 23, 42, 0.08);
}
body.site-page[data-theme="dark"][data-surface="glass"] .nav-item,
body.site-page[data-theme="dark"][data-surface="glass"] .search-box,
body.site-page[data-theme="dark"][data-surface="glass"] .search-engine,
body.site-page[data-theme="dark"][data-surface="glass"] .preference-panel,
body.site-page[data-theme="dark"][data-surface="glass"] .preference-toggle,
body.site-page[data-theme="dark"][data-surface="glass"] .segmented-control {
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.15),
    inset 1px 0 0 rgba(255, 255, 255, 0.06),
    inset -1px 0 0 rgba(255, 255, 255, 0.06),
    0 2px 8px rgba(0, 0, 0, 0.18),
    0 8px 24px rgba(0, 0, 0, 0.24);
}
body.site-page[data-surface="glass"] .nav-item:hover {
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.42),
    inset 1px 0 0 rgba(255, 255, 255, 0.16),
    inset -1px 0 0 rgba(255, 255, 255, 0.16),
    0 4px 16px rgba(15, 23, 42, 0.1),
    0 12px 32px rgba(15, 23, 42, 0.12);
  transform: translateY(-1px);
  transition: all 0.22s cubic-bezier(0.22, 1, 0.36, 1);
}

/* 亚克力模式：顶栏应用色染层 */
body.site-page[data-surface="acrylic"] .header {
  backdrop-filter: blur(20px) saturate(175%) brightness(103%);
  -webkit-backdrop-filter: blur(20px) saturate(175%) brightness(103%);
}

/* 亚克力：增强内描边和高光层次 */
body.site-page[data-surface="acrylic"] .nav-item:hover {
  box-shadow:
    inset 0 2px 0 rgba(255, 255, 255, 0.32),
    inset 0 0 0 1px rgba(255, 255, 255, 0.18),
    0 4px 16px rgba(15, 23, 42, 0.12),
    0 12px 36px rgba(15, 23, 42, 0.14);
  transform: translateY(-1px);
  transition: all 0.22s cubic-bezier(0.22, 1, 0.36, 1);
}
body.site-page[data-theme="dark"][data-surface="acrylic"] .nav-item:hover {
  box-shadow:
    inset 0 2px 0 rgba(255, 255, 255, 0.12),
    inset 0 0 0 1px rgba(255, 255, 255, 0.08),
    0 4px 16px rgba(0, 0, 0, 0.28),
    0 12px 36px rgba(0, 0, 0, 0.36);
}

/* 云母模式：顶栏高模糊贴合桌面 */
body.site-page[data-surface="mica"] .header {
  backdrop-filter: blur(40px) saturate(118%);
  -webkit-backdrop-filter: blur(40px) saturate(118%);
  box-shadow: 0 1px 0 var(--surface-rim), 0 6px 16px rgba(15, 23, 42, 0.04);
}

/* 云母：优化背景融合和悬浮感 */
body.site-page[data-surface="mica"] .nav-item:hover {
  box-shadow:
    0 2px 12px rgba(15, 23, 42, 0.06),
    0 6px 20px rgba(15, 23, 42, 0.08);
  transform: translateY(-0.5px);
  transition: all 0.24s cubic-bezier(0.22, 1, 0.36, 1);
}
body.site-page[data-theme="dark"][data-surface="mica"] .nav-item:hover {
  box-shadow:
    0 2px 12px rgba(0, 0, 0, 0.2),
    0 6px 20px rgba(0, 0, 0, 0.28);
}
/* 云母：色温层透明度微调，增强背景渗透 */
body.site-page[data-surface="mica"] .nav-item::before,
body.site-page[data-surface="mica"] .search-box::before {
  opacity: 0.65;
}

/* 头部菜单文案颜色随主题切换 */
body.site-page .header-menu a,
body.site-page .preference-toggle,
body.site-page .preference-label,
body.site-page .preference-advanced-summary,
body.site-page .preference-reset,
body.site-page .segmented-option {
  color: var(--header-text);
}
body.site-page .header-menu li.current-menu-item a {
  color: var(--accent);
}

/* 卡片 / 面板共用质感 */
body.site-page .nav-item,
body.site-page .search-box,
body.site-page .search-engine,
body.site-page .preference-panel {
  border-color: var(--card-border);
  backdrop-filter: var(--surface-blur);
  -webkit-backdrop-filter: var(--surface-blur);
}
body.site-page .nav-item {
  background: var(--card-final-bg);
}
body.site-page .search-box,
body.site-page .search-engine {
  background: var(--panel-final-bg);
}
body.site-page .preference-panel {
  background: var(--panel-bg);
}
body.site-page .nav-item:hover {
  box-shadow: var(--card-shadow);
}
body.site-page .search-box:hover,
body.site-page .search-box:focus-within {
  background: var(--card-strong-final-bg);
}
body.site-page .search-engine {
  box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
}

/* 液态玻璃下的高光与折射层 */
body.site-page[data-surface="liquid"] .nav-item,
body.site-page[data-surface="liquid"] .nav-section-title,
body.site-page[data-surface="liquid"] .search-engine,
body.site-page[data-surface="liquid"] .preference-panel,
body.site-page[data-surface="liquid"] .search-box,
body.site-page[data-surface="liquid"] .preference-toggle,
body.site-page[data-surface="liquid"] .segmented-control {
  isolation: isolate;
  overflow: hidden;
  border: 1px solid var(--liquid-edge);
  box-shadow: var(--card-shadow);
  backdrop-filter: var(--surface-blur);
  -webkit-backdrop-filter: var(--surface-blur);
}
body.site-page[data-surface="liquid"] .nav-item,
body.site-page[data-surface="liquid"] .nav-section-title {
  background: var(--card-final-bg);
}
body.site-page[data-surface="liquid"] .search-engine,
body.site-page[data-surface="liquid"] .search-box {
  background: var(--panel-final-bg);
}
body.site-page[data-surface="liquid"] .preference-panel {
  background: var(--panel-bg);
  overflow-x: hidden;
  overflow-y: auto;
}

/* 给原本 static 的容器额外设 relative；search-engine / preference-panel 保留浮窗定位 */
body.site-page[data-surface="liquid"] .nav-item,
body.site-page[data-surface="liquid"] .nav-section-title,
body.site-page[data-surface="liquid"] .search-box,
body.site-page[data-surface="liquid"] .preference-toggle,
body.site-page[data-surface="liquid"] .segmented-control {
  position: relative;
}

/* 子元素提层，避免被边框/伪元素干扰 */
body.site-page[data-surface="liquid"] .nav-item > *,
body.site-page[data-surface="liquid"] .search-engine > *,
body.site-page[data-surface="liquid"] .preference-panel > *,
body.site-page[data-surface="liquid"] .search-box > *,
body.site-page[data-surface="liquid"] .preference-toggle > *,
body.site-page[data-surface="liquid"] .segmented-control > * {
  position: relative;
  z-index: 1;
}

/* hover：凝胶弹性缩放 */
body.site-page[data-surface="liquid"] .nav-item {
  transition:
    transform 0.28s cubic-bezier(0.22, 1, 0.36, 1),
    box-shadow 0.28s ease;
}
body.site-page[data-surface="liquid"] .nav-item:hover {
  transform: scale(1.025) translateY(-2px);
  box-shadow:
    0 22px 44px -16px rgba(15, 23, 42, 0.28),
    0 8px 16px -10px rgba(15, 23, 42, 0.18);
}
body.site-page[data-surface="liquid"] .nav-item:active {
  transform: scale(0.985);
  transition:
    transform 0.1s cubic-bezier(0.22, 1, 0.36, 1),
    box-shadow 0.1s ease;
}
body.site-page[data-theme="dark"][data-surface="liquid"] .nav-item:hover {
  box-shadow:
    0 22px 44px -16px rgba(0, 0, 0, 0.55),
    0 8px 16px -10px rgba(0, 0, 0, 0.4);
}

/* 搜索框相关元素的层级修复 */
body.site-page[data-surface="liquid"] .search-box .search-input {
  position: relative;
  z-index: 1;
  background: transparent;
}
body.site-page[data-surface="liquid"] .search-box .search-engine-toggle,
body.site-page[data-surface="liquid"] .search-box .search-btn {
  position: absolute;
  z-index: 2;
}

/* ─── 真折射：每元素一份独立 SVG filter（JS 注入）───
 * 仅 Chromium 系生效。位移图按 256px 边长上限降采样，并按视口懒加载导航卡。
 */
html[data-liquid-glass-supported="true"] body.site-page[data-surface="liquid"] .nav-item,
html[data-liquid-glass-supported="true"] body.site-page[data-surface="liquid"] .nav-section-title {
  background: color-mix(in srgb, var(--card-final-bg) 55%, transparent);
}
html[data-liquid-glass-supported="true"] body.site-page[data-surface="liquid"] .search-box,
html[data-liquid-glass-supported="true"] body.site-page[data-surface="liquid"] .search-engine {
  background: color-mix(in srgb, var(--panel-final-bg) 55%, transparent);
}
html[data-liquid-glass-supported="true"] body.site-page[data-surface="liquid"] .preference-panel {
  background: rgba(255, 255, 255, 0.32);
}
html[data-liquid-glass-supported="true"] body.site-page[data-surface="liquid"] .preference-toggle,
html[data-liquid-glass-supported="true"] body.site-page[data-surface="liquid"] .segmented-control {
  background: rgba(255, 255, 255, 0.12);
}
html[data-liquid-glass-supported="true"] body.site-page[data-surface="liquid"][data-theme="dark"] .preference-panel {
  background: rgba(15, 23, 42, 0.42);
}
html[data-liquid-glass-supported="true"] body.site-page[data-surface="liquid"][data-theme="dark"] .preference-toggle,
html[data-liquid-glass-supported="true"] body.site-page[data-surface="liquid"][data-theme="dark"] .segmented-control {
  background: rgba(15, 23, 42, 0.22);
}

/* preference-panel 已挂到 body 下；仍保留独立合成层，避免 Chromium 在
   打开设置并离开顶栏时对液态玻璃面板重采样出现瞬时横向闪烁。 */
html[data-liquid-glass-supported="true"] body.site-page[data-surface="liquid"] .preference-panel {
  will-change: backdrop-filter;
  transform: translateZ(0);
}

/* 关键修复：液态玻璃 + 支持折射时，去掉 .header 自己的 backdrop-filter，
   防止它给子节点 .preference-panel 形成嵌套合成层（嵌套合成层会让子元素的
   backdrop-filter 采样到 header 内部即空白，而不是真正的页面背景）。
   作为补偿：保留主题变量给出的半透明顶栏底色。
   注意：JS 也排除 .header，不再给它写 inline backdrop-filter。 */
html[data-liquid-glass-supported="true"] body.site-page[data-surface="liquid"] .header {
  backdrop-filter: none !important;
  -webkit-backdrop-filter: none !important;
  background: var(--header-final-bg) !important;
}

/* header::before 在液态玻璃下不需要 */
body.site-page[data-surface="liquid"] .header::before {
  display: none;
}

@media (prefers-reduced-motion: reduce) {
  html[data-liquid-glass-supported="true"] body.site-page[data-surface="liquid"] .nav-item:hover {
    transform: none;
  }
}

/* 亚克力：板材内描边 + soft-light 色染层（近似 Fluent Acrylic 的 luminosity 染色）。
   .search-engine / .preference-panel 保持 absolute/fixed，只加 isolation。 */
body.site-page[data-surface="acrylic"] .nav-item,
body.site-page[data-surface="acrylic"] .nav-section-title,
body.site-page[data-surface="acrylic"] .search-box,
body.site-page[data-surface="acrylic"] .search-engine,
body.site-page[data-surface="acrylic"] .preference-panel,
body.site-page[data-surface="acrylic"] .preference-toggle,
body.site-page[data-surface="acrylic"] .segmented-control {
  isolation: isolate;
  overflow: hidden;
  box-shadow:
    inset 0 1px 0 var(--surface-sheen),
    inset 0 0 0 1px var(--surface-rim),
    var(--card-shadow);
}
body.site-page[data-surface="acrylic"] .nav-item,
body.site-page[data-surface="acrylic"] .nav-section-title,
body.site-page[data-surface="acrylic"] .search-box,
body.site-page[data-surface="acrylic"] .preference-toggle,
body.site-page[data-surface="acrylic"] .segmented-control {
  position: relative;
}
body.site-page[data-surface="acrylic"] .preference-panel {
  overflow-x: hidden;
  overflow-y: auto;
}
body.site-page[data-surface="acrylic"] .nav-item::before,
body.site-page[data-surface="acrylic"] .nav-section-title::before,
body.site-page[data-surface="acrylic"] .search-box::before,
body.site-page[data-surface="acrylic"] .search-engine::before,
body.site-page[data-surface="acrylic"] .preference-panel::before,
body.site-page[data-surface="acrylic"] .preference-toggle::before,
body.site-page[data-surface="acrylic"] .segmented-control::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  border-radius: inherit;
  background:
    linear-gradient(145deg, var(--acrylic-tint) 0%, transparent 48%, var(--acrylic-tint-soft) 100%);
  mix-blend-mode: var(--acrylic-luminosity, soft-light);
  opacity: 0.88;
}
body.site-page[data-surface="acrylic"] .nav-item > *,
body.site-page[data-surface="acrylic"] .nav-section-title > *,
body.site-page[data-surface="acrylic"] .search-box > *,
body.site-page[data-surface="acrylic"] .search-engine > *,
body.site-page[data-surface="acrylic"] .preference-panel > *,
body.site-page[data-surface="acrylic"] .preference-toggle > *,
body.site-page[data-surface="acrylic"] .segmented-control > * {
  position: relative;
  z-index: 1;
}
body.site-page[data-surface="acrylic"] .search-box .search-engine-toggle,
body.site-page[data-surface="acrylic"] .search-box .search-btn {
  position: absolute;
  z-index: 2;
}

/* 云母：更轻的 luminosity 色温层 + 安静阴影（native，不走 generic 伪底） */
body.site-page[data-surface="mica"] .nav-item,
body.site-page[data-surface="mica"] .nav-section-title,
body.site-page[data-surface="mica"] .search-box,
body.site-page[data-surface="mica"] .search-engine,
body.site-page[data-surface="mica"] .preference-panel,
body.site-page[data-surface="mica"] .preference-toggle,
body.site-page[data-surface="mica"] .segmented-control {
  isolation: isolate;
  overflow: hidden;
  box-shadow: var(--card-shadow);
}
body.site-page[data-surface="mica"] .nav-item,
body.site-page[data-surface="mica"] .nav-section-title,
body.site-page[data-surface="mica"] .search-box,
body.site-page[data-surface="mica"] .preference-toggle,
body.site-page[data-surface="mica"] .segmented-control {
  position: relative;
}
body.site-page[data-surface="mica"] .preference-panel {
  overflow-x: hidden;
  overflow-y: auto;
}
body.site-page[data-surface="mica"] .nav-item::before,
body.site-page[data-surface="mica"] .nav-section-title::before,
body.site-page[data-surface="mica"] .search-box::before,
body.site-page[data-surface="mica"] .search-engine::before,
body.site-page[data-surface="mica"] .preference-panel::before,
body.site-page[data-surface="mica"] .preference-toggle::before,
body.site-page[data-surface="mica"] .segmented-control::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  border-radius: inherit;
  background: var(--mica-tint);
  mix-blend-mode: var(--mica-luminosity, luminosity);
  opacity: 0.55;
}
body.site-page[data-surface="mica"] .nav-item > *,
body.site-page[data-surface="mica"] .nav-section-title > *,
body.site-page[data-surface="mica"] .search-box > *,
body.site-page[data-surface="mica"] .search-engine > *,
body.site-page[data-surface="mica"] .preference-panel > *,
body.site-page[data-surface="mica"] .preference-toggle > *,
body.site-page[data-surface="mica"] .segmented-control > * {
  position: relative;
  z-index: 1;
}
body.site-page[data-surface="mica"] .search-box .search-engine-toggle,
body.site-page[data-surface="mica"] .search-box .search-btn {
  position: absolute;
  z-index: 2;
}

/* 磨砂纸：用真实纸纹 PNG 全屏覆盖。
   feTurbulence 程序噪声不论怎么调都像电视雪花/拉丝纹理，不像纸；
   真实纸纤维是多尺度交织的不规则斑驳，只能用扫描的纸纹图。
   图来源：transparenttextures.com（Atle Mo / CC BY-SA 3.0）。 */
body.site-page[data-surface="paper"]::after {
  content: "";
  position: fixed;
  inset: 0;
  z-index: 9999;
  pointer-events: none;
  background-image: url("../images/paper-texture.png");
  background-repeat: repeat;
  mix-blend-mode: multiply;
  opacity: 0.9;
}
body.site-page[data-theme="dark"][data-surface="paper"]::after {
  mix-blend-mode: screen;
  opacity: 0.35;
  filter: invert(1);
}

/* 卡片自身不再叠颗粒（避免双层），只保持纸色底色 */
body.site-page[data-surface="paper"] .nav-item,
body.site-page[data-surface="paper"] .search-box,
body.site-page[data-surface="paper"] .search-engine,
body.site-page[data-surface="paper"] .preference-panel,
body.site-page[data-surface="paper"] .preference-toggle,
body.site-page[data-surface="paper"] .segmented-control {
  background-image: none;
}

/* 磨砂纸：增强卡片的纸质感和轻微凸起 */
body.site-page[data-surface="paper"] .nav-item {
  box-shadow:
    0 1px 2px rgba(0, 0, 0, 0.08),
    0 2px 4px rgba(0, 0, 0, 0.06),
    inset 0 1px 0 rgba(255, 255, 255, 0.3);
}
body.site-page[data-surface="paper"] .nav-item:hover {
  box-shadow:
    0 2px 4px rgba(0, 0, 0, 0.1),
    0 4px 8px rgba(0, 0, 0, 0.08),
    inset 0 1px 0 rgba(255, 255, 255, 0.4);
  transform: translateY(-1px);
  transition: all 0.2s ease-out;
}
body.site-page[data-theme="dark"][data-surface="paper"] .nav-item {
  box-shadow:
    0 1px 2px rgba(0, 0, 0, 0.3),
    0 2px 4px rgba(0, 0, 0, 0.2),
    inset 0 1px 0 rgba(255, 255, 255, 0.08);
}
body.site-page[data-theme="dark"][data-surface="paper"] .nav-item:hover {
  box-shadow:
    0 2px 4px rgba(0, 0, 0, 0.4),
    0 4px 8px rgba(0, 0, 0, 0.3),
    inset 0 1px 0 rgba(255, 255, 255, 0.12);
}

/* 黑曜石：关掉顶栏的横向 sheen，玻璃保持纯黑无高光 */
body.site-page[data-surface="obsidian"] .header::before,
body.site-page[data-surface="neon"] .header::before,
body.site-page[data-surface="pixel"] .header::before {
  display: none;
}

/* 黑曜石：1px 冷调亮边 + 顶部高光，强调玻璃切面 */
body.site-page[data-surface="obsidian"] .nav-item,
body.site-page[data-surface="obsidian"] .search-box,
body.site-page[data-surface="obsidian"] .search-engine,
body.site-page[data-surface="obsidian"] .preference-panel,
body.site-page[data-surface="obsidian"] .preference-toggle,
body.site-page[data-surface="obsidian"] .segmented-control {
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.08),
    inset 0 0 0 1px rgba(255, 255, 255, 0.06),
    var(--card-shadow);
}

/* 黑曜石：hover 增强玻璃切面光泽 */
body.site-page[data-surface="obsidian"] .nav-item:hover {
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.14),
    inset 0 0 0 1px rgba(255, 255, 255, 0.10),
    0 4px 16px rgba(0, 0, 0, 0.4),
    0 12px 36px rgba(0, 0, 0, 0.5);
  transform: translateY(-1px);
  transition: all 0.22s cubic-bezier(0.22, 1, 0.36, 1);
}

/* 文本颜色随主题切换 */
body.site-page .nav-name,
body.site-page .nav-section-title {
  color: var(--title-color);
}
body.site-page .nav-item p,
body.site-page .search-input {
  color: var(--text-muted);
}
body.site-page .search-input::placeholder {
  color: var(--text-muted);
  opacity: 0.72;
}

/* 搜索引擎选项继承主题色 */
body.site-page .search-engine-option {
  color: var(--header-text);
  background: var(--control-bg);
}
body.site-page .search-engine-list li {
  background: transparent;
}
body.site-page .search-engine-option:hover,
body.site-page .search-engine-option:focus-visible {
  background: var(--control-active-bg);
}

/* ---------- 10. 密度（紧凑） ---------- */
body.site-page[data-density="compact"] #content-wrapper {
  margin-top: 68px;
}
body.site-page[data-density="compact"] .sousuo {
  padding: 280px 0 32px 0;
}
body.site-page[data-density="compact"] .nav-cell {
  margin-bottom: 12px;
}
body.site-page[data-density="compact"] .nav-section-title {
  min-height: 34px;
  margin-bottom: 6px;
  padding: 6px 12px;
  border-radius: 10px;
  font-size: 14px;
}
body.site-page[data-density="compact"] .nav-section-title::before {
  content: none;
}
body.site-page[data-density="compact"] .nav-list {
  margin-left: -6px;
  margin-right: -6px;
}
body.site-page[data-density="compact"] .nav-list li {
  padding: 6px;
}
body.site-page[data-density="compact"] .nav-item {
  padding: 10px;
  border-radius: 10px;
}
body.site-page[data-density="compact"] .nav-item .nav-img {
  width: 30px;
  height: 30px;
  margin-right: 8px;
}
body.site-page[data-density="compact"] .nav-item .nav-name {
  height: 30px;
  line-height: 30px;
  font-size: 14px;
}
body.site-page[data-density="compact"] .nav-item p {
  line-height: 18px;
}
body.site-page[data-density="compact"] .nav-item.has-description .nav-img {
  margin-bottom: 28px;
}

/* ---------- 11. 响应式 ---------- */
@media only screen and (min-width: 1200px) {
  .container { width: 1100px; }
  #main-content { width: 750px; }
  aside#sidebar { width: 300px; }
}

@media only screen and (min-width: 769px) and (max-width: 1199px) {
  .container { width: 730px; }
  #main-content { width: 490px; }
  aside#sidebar { width: 230px; }
  .nav-list { grid-template-columns: repeat(3, minmax(0, 1fr)); }
}

@media only screen and (max-width: 768px) {
  .container,
  .header-mobile { width: 93%; }
  header .container { display: none; }
  header .header-mobile { display: block; }
  #main-content,
  aside#sidebar { float: none; width: 100%; }
  aside#sidebar {
    display: none;
    width: 480px;
    max-width: 100% !important;
  }
  header { padding-top: 0; padding-bottom: 52px; }
  .header-mobile { margin: 0 auto; }
  #mobile-nav-site {
    float: left;
    color: #fff;
    font-size: 28px;
    line-height: 52px;
    font-weight: 700;
    font-family: STXinwei, Helvetica, Arial, serif;
  }
  #mobile-nav-menu {
    float: right;
    color: #fff;
    font-size: 16px;
    padding-top: 12px;
  }
}

@media (max-width: 768px) {
  .header { position: static; }
  .header-menu {
    margin: 0;
    text-align: left;
    float: left;
  }
  .header-menu > ul > li {
    float: none;
    display: inline-block;
    margin: 0 10px;
  }
  body.site-page.is-header-tight .header-menu > ul > li {
    margin: 0 6px 0 0;
  }
  body.site-page.is-header-tight .header-menu > ul > li a {
    line-height: 40px;
    padding: 0 4px;
  }
  body.site-page.is-header-tight .header-menu a {
    font-size: 14px;
    letter-spacing: 0;
  }
  #content-wrapper {
    margin-top: 10px;
    margin-bottom: 0;
  }
  .nav-list {
    grid-template-columns: repeat(2, minmax(0, 260px));
    justify-content: center;
  }
  .nav-list-art li { width: 100%; }

  .site-preferences {
    float: right;
    justify-content: flex-end;
    height: 52px;
  }
  body.site-page.is-header-tight .site-preferences {
    height: 40px;
  }
  .preference-panel {
    top: 40px;
    width: min(320px, 88vw);
  }

  body.site-page[data-density="compact"] #content-wrapper {
    margin-top: 8px;
  }
  body.site-page[data-density="compact"] .sousuo {
    padding: 120px 0 28px 0;
  }
}

@media (max-width: 560px) {
  .nav-list { grid-template-columns: minmax(0, 260px); }
}


/* ═══════════════════════════════════════════════════════════════════
 * 扩展质感：赛博霓虹 / 邮票 / 手绘草稿 / 8-bit 像素 / 流体渐变 / 彩虹玻璃
 * ═══════════════════════════════════════════════════════════════════ */

/* ─── 赛博霓虹（Cyberpunk Neon） ───
 * 参考 cybercore.css / Roboron3042/Cyberpunk-Neon。
 * 配方：纯黑底 + 高饱和粉边框 + 多层 box-shadow 做内外发光。 */
body.site-page[data-surface="neon"] {
  --site-style-background:
    repeating-linear-gradient(135deg, rgba(5, 217, 232, 0.12) 0 2px, transparent 2px 22px),
    linear-gradient(135deg, #080414 0%, #180824 48%, #020617 100%);
  --site-style-background-size: 28px 28px, cover;
  --site-style-background-position: center, center;
  --site-style-background-repeat: repeat, no-repeat;
  --header-bg: rgba(8, 4, 20, 0.85);
  --header-border: #ff2a6d;
  --header-text-base: #d1f7ff;
  --accent: #05d9e8;
  --card-bg: rgba(8, 4, 20, 0.78);
  --card-bg-strong: rgba(20, 8, 36, 0.88);
  --card-opacity-color: #080414;
  --card-strong-opacity-color: #140824;
  --panel-opacity-color: #080414;
  --card-border: #ff2a6d;
  --card-shadow:
    0 0 0 1px #ff2a6d,
    0 0 12px rgba(255, 42, 109, 0.6),
    inset 0 0 12px rgba(255, 42, 109, 0.18);
  --title-color-base: #d1f7ff;
  --text-muted-base: #7eb6c4;
  --panel-bg: rgba(8, 4, 20, 0.92);
  --control-bg: rgba(255, 42, 109, 0.12);
  --control-active-bg: rgba(5, 217, 232, 0.22);
  --control-border: rgba(5, 217, 232, 0.3);
  --surface-blur: blur(2px) saturate(140%);
  color-scheme: dark;
}
body.site-page[data-theme="dark"][data-surface="neon"] {
  /* 深色和浅色一样，霓虹永远黑底 */
}
body.site-page[data-surface="neon"] .nav-item:hover {
  box-shadow:
    0 0 0 1px #05d9e8,
    0 0 16px rgba(5, 217, 232, 0.7),
    inset 0 0 16px rgba(5, 217, 232, 0.22);
  transform: translateY(-2px);
  transition: all 0.2s cubic-bezier(0.22, 1, 0.36, 1);
}
body.site-page[data-surface="neon"] .nav-name {
  text-shadow: 0 0 6px rgba(209, 247, 255, 0.6);
}

/* 赛博霓虹：增强扫描线动画和发光效果 */
body.site-page[data-surface="neon"] .nav-item {
  border: 1px solid rgba(255, 42, 109, 0.4);
  box-shadow:
    0 0 0 1px rgba(5, 217, 232, 0.2),
    0 0 8px rgba(255, 42, 109, 0.3),
    inset 0 0 8px rgba(5, 217, 232, 0.08);
  transition: all 0.2s cubic-bezier(0.22, 1, 0.36, 1);
}

/* ─── 8-bit 像素（Pixel） ───
 * 参考 NES.css / 8bitcn 标准做法。
 * 阶梯式 box-shadow 模拟像素方块边框（常驻），hover 仅加粗+换色。 */
body.site-page[data-surface="pixel"] {
  --site-style-background:
    linear-gradient(135deg, rgba(252, 211, 77, 0.1), rgba(26, 32, 48, 0) 42%),
    repeating-linear-gradient(0deg, rgba(252, 211, 77, 0.12) 0 2px, transparent 2px 24px),
    repeating-linear-gradient(90deg, rgba(252, 211, 77, 0.08) 0 2px, transparent 2px 24px),
    linear-gradient(135deg, #1a2030 0%, #2a3340 100%);
  --site-style-background-size: cover, 24px 24px, 24px 24px, cover;
  --site-style-background-position: center, center, center, center;
  --site-style-background-repeat: no-repeat, repeat, repeat, no-repeat;
  --header-bg: #2a3340;
  --header-border: #fcd34d;
  --header-text-base: #f8f8f8;
  --accent: #fcd34d;
  --card-bg: #1a2030;
  --card-bg-strong: #252d40;
  --card-opacity-color: #1a2030;
  --card-strong-opacity-color: #252d40;
  --panel-opacity-color: #1a2030;
  --card-border: transparent;
  --card-shadow:
    0 -4px 0 0 #fcd34d,
    0 4px 0 0 #fcd34d,
    -4px 0 0 0 #fcd34d,
    4px 0 0 0 #fcd34d;
  --title-color-base: #f8f8f8;
  --text-muted-base: #a0b0c8;
  --panel-bg: #1a2030;
  --control-bg: #252d40;
  /* 选中态用深背景 + 黄字，避免黄底黄字看不见 */
  --control-active-bg: #3d4860;
  --control-border: #fcd34d;
  --surface-blur: none;
  font-family: "Courier New", "宋体", monospace;
  color-scheme: dark;
}
body.site-page[data-surface="pixel"] .nav-item,
body.site-page[data-surface="pixel"] .search-box,
body.site-page[data-surface="pixel"] .search-engine,
body.site-page[data-surface="pixel"] .preference-panel,
body.site-page[data-surface="pixel"] .preference-toggle,
body.site-page[data-surface="pixel"] .segmented-control {
  border-radius: 0;
  font-family: "Courier New", "宋体", monospace;
  /* 像素四边框常驻（细） */
  box-shadow:
    0 -2px 0 0 #fcd34d,
    0 2px 0 0 #fcd34d,
    -2px 0 0 0 #fcd34d,
    2px 0 0 0 #fcd34d;
  transition: box-shadow 0.12s steps(2);
}
/* 像素框常驻——hover 时框变粗，字加粗变色 */
body.site-page[data-surface="pixel"] .nav-item:hover {
  transform: none;
  box-shadow:
    0 -4px 0 0 #fcd34d,
    0 4px 0 0 #fcd34d,
    -4px 0 0 0 #fcd34d,
    4px 0 0 0 #fcd34d;
}
body.site-page[data-surface="pixel"] .nav-item:hover .nav-name {
  color: #fcd34d;
  font-weight: 700;
}
/* 像素：active 时模拟按下效果 */
body.site-page[data-surface="pixel"] .nav-item:active {
  box-shadow:
    0 -2px 0 0 #dc2626,
    0 2px 0 0 #dc2626,
    -2px 0 0 0 #dc2626,
    2px 0 0 0 #dc2626;
  background: rgba(252, 211, 77, 0.08);
}
body.site-page[data-surface="pixel"] .nav-img {
  image-rendering: pixelated;
  image-rendering: crisp-edges;
  border-radius: 0;
}
/* 选中的分段按钮：加粗 + 黄色字，背景仍是深色 */
body.site-page[data-surface="pixel"] .segmented-option.is-active {
  color: #fcd34d !important;
  font-weight: 700;
  background: #3d4860;
}

/* 简洁背景优先：多层大气渐变，不用网格噪点，给半透明卡片留轮廓。 */
body.site-page[data-theme-background-priority="simple"] {
  --background-dim: rgba(15, 23, 42, 0.04);
  --site-style-background:
    radial-gradient(ellipse 90% 70% at 12% 8%, rgba(255, 255, 255, 0.55), transparent 55%),
    radial-gradient(ellipse 80% 60% at 88% 92%, rgba(148, 163, 184, 0.28), transparent 50%),
    linear-gradient(145deg, #e8eef6 0%, #d5e0ec 42%, #e4ebf3 100%);
  --site-style-background-size: cover, cover, cover;
  --site-style-background-position: center, center, center;
  --site-style-background-repeat: no-repeat, no-repeat, no-repeat;
}
body.site-page[data-theme-background-priority="simple"][data-surface="glass"] {
  --site-style-background:
    radial-gradient(ellipse 70% 55% at 18% 12%, rgba(255, 255, 255, 0.72), transparent 48%),
    radial-gradient(ellipse 55% 50% at 82% 78%, rgba(147, 197, 253, 0.35), transparent 52%),
    linear-gradient(135deg, #c9dcf0 0%, #b4c9df 48%, #d8e6f4 100%);
  --site-style-background-size: cover, cover, cover;
  --site-style-background-position: center, center, center;
  --site-style-background-repeat: no-repeat, no-repeat, no-repeat;
}
body.site-page[data-theme-background-priority="simple"][data-surface="plain"] {
  --site-style-background:
    radial-gradient(ellipse 85% 60% at 50% 0%, rgba(255, 255, 255, 0.5), transparent 58%),
    linear-gradient(160deg, #d9e3ee 0%, #c2d0de 52%, #d4dee8 100%);
  --site-style-background-size: cover, cover;
  --site-style-background-position: center, center;
  --site-style-background-repeat: no-repeat, no-repeat;
}
body.site-page[data-theme-background-priority="simple"][data-surface="acrylic"] {
  --site-style-background:
    radial-gradient(ellipse 60% 50% at 15% 20%, rgba(255, 255, 255, 0.55), transparent 50%),
    radial-gradient(ellipse 50% 45% at 78% 70%, rgba(196, 181, 253, 0.28), transparent 55%),
    linear-gradient(135deg, #c5d6ec 0%, #b8c4e0 36%, #d4b8c8 68%, #c2d8ea 100%);
  --site-style-background-size: cover, cover, cover;
  --site-style-background-position: center, center, center;
  --site-style-background-repeat: no-repeat, no-repeat, no-repeat;
}
body.site-page[data-theme-background-priority="simple"][data-surface="mica"] {
  --site-style-background:
    radial-gradient(ellipse 75% 55% at 20% 15%, rgba(241, 245, 249, 0.65), transparent 52%),
    radial-gradient(ellipse 60% 50% at 85% 85%, rgba(148, 163, 184, 0.3), transparent 50%),
    linear-gradient(150deg, #d0dae6 0%, #b9c8db 50%, #d4dce6 100%);
  --site-style-background-size: cover, cover, cover;
  --site-style-background-position: center, center, center;
  --site-style-background-repeat: no-repeat, no-repeat, no-repeat;
}
body.site-page[data-theme-background-priority="simple"][data-surface="paper"] {
  --site-style-background:
    radial-gradient(ellipse 70% 50% at 30% 10%, rgba(255, 252, 245, 0.7), transparent 55%),
    radial-gradient(ellipse 50% 40% at 80% 90%, rgba(180, 150, 120, 0.18), transparent 50%),
    linear-gradient(145deg, #e2d3bc 0%, #d2bfa4 48%, #e0d2bb 100%);
  --site-style-background-size: cover, cover, cover;
  --site-style-background-position: center, center, center;
  --site-style-background-repeat: no-repeat, no-repeat, no-repeat;
}
body.site-page[data-theme-background-priority="simple"][data-surface="liquid"] {
  /* 液态玻璃简洁底：清透水光 + 冷色焦散，避免粉紫脏色 */
  --site-style-background:
    radial-gradient(ellipse 70% 55% at 18% 22%, rgba(255, 255, 255, 0.78), transparent 52%),
    radial-gradient(ellipse 55% 48% at 78% 28%, rgba(125, 211, 252, 0.42), transparent 55%),
    radial-gradient(ellipse 60% 50% at 55% 88%, rgba(56, 189, 248, 0.22), transparent 58%),
    radial-gradient(ellipse 40% 35% at 42% 48%, rgba(186, 230, 253, 0.35), transparent 60%),
    linear-gradient(155deg, #d6eaf8 0%, #b9d9ef 36%, #c5e0f2 62%, #e2f0fa 100%);
  --site-style-background-size: cover, cover, cover, cover, cover;
  --site-style-background-position: center, center, center, center, center;
  --site-style-background-repeat: no-repeat, no-repeat, no-repeat, no-repeat, no-repeat;
}
body.site-page[data-theme-background-priority="simple"][data-surface="obsidian"] {
  --background-dim: rgba(2, 6, 23, 0.08);
  --site-style-background:
    radial-gradient(ellipse 50% 40% at 18% 14%, rgba(148, 163, 184, 0.22), transparent 55%),
    radial-gradient(ellipse 45% 40% at 82% 86%, rgba(71, 85, 105, 0.28), transparent 50%),
    linear-gradient(150deg, #2a3442 0%, #1a222d 48%, #0f141c 100%);
  --site-style-background-size: cover, cover, cover;
  --site-style-background-position: center, center, center;
  --site-style-background-repeat: no-repeat, no-repeat, no-repeat;
}
body.site-page[data-theme-background-priority="simple"][data-surface="neon"] {
  --background-dim: rgba(2, 6, 23, 0.18);
  --site-style-background:
    radial-gradient(ellipse 45% 40% at 22% 18%, rgba(236, 72, 153, 0.28), transparent 55%),
    radial-gradient(ellipse 40% 35% at 78% 72%, rgba(34, 211, 238, 0.22), transparent 50%),
    linear-gradient(145deg, #0a0618 0%, #160820 50%, #050614 100%);
  --site-style-background-size: cover, cover, cover;
  --site-style-background-position: center, center, center;
  --site-style-background-repeat: no-repeat, no-repeat, no-repeat;
}
body.site-page[data-theme-background-priority="simple"][data-surface="pixel"] {
  --background-dim: rgba(2, 6, 23, 0.06);
  --site-style-background:
    radial-gradient(ellipse 40% 30% at 70% 20%, rgba(252, 211, 77, 0.16), transparent 50%),
    linear-gradient(180deg, #141a28 0%, #1e2738 55%, #252f40 100%);
  --site-style-background-size: cover, cover;
  --site-style-background-position: center, center;
  --site-style-background-repeat: no-repeat, no-repeat;
}

/* 通用渲染器：常规质感用伪层接管卡片底，不改变文字和图标。
   .search-engine 必须保持 absolute 浮层定位：若写成 relative，会连同 top:60px
   落入文档流并下移，错误遮盖下方网站卡片（glass/mica/paper/plain 等主题）。
   absolute 本身已能作为 ::before 的定位包含块，只需 isolation。 */
body.site-page[data-card-renderer="generic"][data-card-opacity="custom"] .nav-item,
body.site-page[data-card-renderer="generic"][data-card-opacity="custom"] .nav-section-title,
body.site-page[data-card-renderer="generic"][data-card-opacity="custom"] .bookmark-empty,
body.site-page[data-card-renderer="generic"][data-card-opacity="custom"] .bookmark-info-panel {
  position: relative;
  isolation: isolate;
}
body.site-page[data-card-renderer="generic"][data-card-opacity="custom"] .search-engine {
  isolation: isolate;
}
body.site-page[data-card-renderer="generic"][data-card-opacity="custom"] .nav-item > *,
body.site-page[data-card-renderer="generic"][data-card-opacity="custom"] .bookmark-empty > *,
body.site-page[data-card-renderer="generic"][data-card-opacity="custom"] .search-engine > *,
body.site-page[data-card-renderer="generic"][data-card-opacity="custom"] .bookmark-info-panel > * {
  position: relative;
  z-index: 1;
}
body.site-page[data-card-renderer="generic"][data-card-opacity="custom"] .nav-item,
body.site-page[data-card-renderer="generic"][data-card-opacity="custom"] .nav-section-title,
body.site-page[data-card-renderer="generic"][data-card-opacity="custom"] .bookmark-empty,
body.site-page[data-card-renderer="generic"][data-card-opacity="custom"] .search-engine,
body.site-page[data-card-renderer="generic"][data-card-opacity="custom"] .bookmark-info-panel {
  background: transparent !important;
  border-color: transparent !important;
  box-shadow: none !important;
  backdrop-filter: none !important;
  -webkit-backdrop-filter: none !important;
}
body.site-page[data-card-renderer="generic"][data-card-opacity="custom"] .nav-item::before,
body.site-page[data-card-renderer="generic"][data-card-opacity="custom"] .nav-section-title::before,
body.site-page[data-card-renderer="generic"][data-card-opacity="custom"] .bookmark-empty::before,
body.site-page[data-card-renderer="generic"][data-card-opacity="custom"] .search-engine::before,
body.site-page[data-card-renderer="generic"][data-card-opacity="custom"] .bookmark-info-panel::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  border: 1px solid var(--card-border);
  border-radius: inherit;
  background: var(--card-final-bg);
  backdrop-filter: var(--surface-blur);
  -webkit-backdrop-filter: var(--surface-blur);
}
body.site-page[data-card-renderer="generic"][data-card-opacity="custom"] .nav-section-title,
body.site-page[data-card-renderer="generic"][data-card-opacity="custom"] .bookmark-empty {
  z-index: 0;
}
body.site-page[data-card-renderer="generic"][data-card-opacity="custom"] .nav-section-title::before,
body.site-page[data-card-renderer="generic"][data-card-opacity="custom"] .bookmark-empty::before {
  z-index: -1;
}
body.site-page[data-card-renderer="generic"][data-card-opacity="custom"] .search-engine::before,
body.site-page[data-card-renderer="generic"][data-card-opacity="custom"] .bookmark-info-panel::before {
  background: var(--panel-final-bg);
}
body.site-page[data-card-renderer="generic"][data-card-opacity="custom"] .search-engine::before {
  box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
}
body.site-page[data-card-renderer="generic"][data-card-opacity="custom"] .nav-item:hover::before,
body.site-page[data-card-renderer="generic"][data-card-opacity="custom"] .nav-section-title:hover::before {
  box-shadow: var(--card-shadow);
}
/* 跟随配色下的文字明暗度：混合当前主题文字变量，不切到自定义色。 */
body.site-page[data-text-contrast="off"][data-text-color-mode="default"][data-text-brightness="custom"] {
  --header-text: color-mix(in srgb, var(--header-text-base) var(--text-brightness-base, 100%), var(--text-brightness-color, #fff));
  --title-color: color-mix(in srgb, var(--title-color-base) var(--text-brightness-base, 100%), var(--text-brightness-color, #fff));
  --text-muted: color-mix(in srgb, var(--text-muted-base) var(--text-brightness-base, 100%), var(--text-brightness-color, #fff));
}

/* 自定义文字主题色只在反色关闭时生效，避免与差值混合/采样反色同时改色。 */
body.site-page[data-text-contrast="off"][data-text-color-mode="custom"] {
  --title-color: var(--custom-text-color);
  --text-muted: var(--custom-text-color);
  --header-text: var(--custom-text-color);
  --custom-text-muted: var(--custom-text-color);
  --custom-text-control: var(--custom-text-color);
}
@supports (color: color-mix(in srgb, #000 50%, #fff)) {
  body.site-page[data-text-contrast="off"][data-text-color-mode="custom"] {
    --text-muted: color-mix(in srgb, var(--custom-text-color) 70%, var(--text-muted-base));
    --header-text: color-mix(in srgb, var(--custom-text-color) 86%, var(--header-text-base));
    --custom-text-muted: var(--text-muted);
    --custom-text-control: var(--header-text);
  }
}
body.site-page[data-text-contrast="off"][data-text-color-mode="custom"] .header .site,
body.site-page[data-text-contrast="off"][data-text-color-mode="custom"] .nav-name,
body.site-page[data-text-contrast="off"][data-text-color-mode="custom"] .nav-section-title {
  color: var(--custom-text-color);
}
body.site-page[data-text-contrast="off"][data-text-color-mode="custom"] .nav-item p,
body.site-page[data-text-contrast="off"][data-text-color-mode="custom"] .search-input,
body.site-page[data-text-contrast="off"][data-text-color-mode="custom"] .search-input::placeholder {
  color: var(--custom-text-muted);
}
body.site-page[data-text-contrast="off"][data-text-color-mode="custom"] .header-menu a,
body.site-page[data-text-contrast="off"][data-text-color-mode="custom"] .preference-toggle,
body.site-page[data-text-contrast="off"][data-text-color-mode="custom"] .preference-label,
body.site-page[data-text-contrast="off"][data-text-color-mode="custom"] .preference-value,
body.site-page[data-text-contrast="off"][data-text-color-mode="custom"] .preference-advanced-summary,
body.site-page[data-text-contrast="off"][data-text-color-mode="custom"] .preference-reset,
body.site-page[data-text-contrast="off"][data-text-color-mode="custom"] .search-engine-option,
body.site-page[data-text-contrast="off"][data-text-color-mode="custom"] .segmented-option,
body.site-page[data-text-contrast="off"][data-text-color-mode="custom"] .text-color-default,
body.site-page[data-text-contrast="off"][data-text-color-mode="custom"] .text-shadow-toggle,
body.site-page[data-text-contrast="off"][data-text-color-mode="custom"] .text-bold-toggle,
body.site-page[data-text-contrast="off"][data-text-color-mode="custom"] .text-color-input {
  color: var(--custom-text-control);
}

/* 文字反色：标准使用整页采样，增强使用文字附近的局部采样。 */
body.site-page[data-text-contrast-method="sample"][data-text-contrast-tone="dark"] {
  --sample-title-color: #f8fafc;
  --sample-muted-color: #dbe7f4;
  --sample-control-color: #f8fafc;
}
body.site-page[data-text-contrast-method="sample"][data-text-contrast-tone="light"] {
  --sample-title-color: #111827;
  --sample-muted-color: #334155;
  --sample-control-color: #111827;
}
body.site-page[data-text-contrast-method="sample"][data-text-contrast="primary"] .nav-name,
body.site-page[data-text-contrast-method="sample"][data-text-contrast="primary"] .nav-section-title,
body.site-page[data-text-contrast-method="sample"][data-text-contrast="full"] .nav-name,
body.site-page[data-text-contrast-method="sample"][data-text-contrast="full"] .nav-section-title {
  color: var(--sample-title-color) !important;
}
body.site-page[data-text-contrast-method="sample"][data-text-contrast="full"] .nav-item p,
body.site-page[data-text-contrast-method="sample"][data-text-contrast="full"] .search-input,
body.site-page[data-text-contrast-method="sample"][data-text-contrast="full"] .search-input::placeholder {
  color: var(--sample-muted-color) !important;
}
body.site-page[data-text-contrast-method="sample"][data-text-contrast="full"] .search-engine-option,
body.site-page[data-text-contrast-method="sample"][data-text-contrast="full"] .header-menu a {
  color: var(--sample-control-color) !important;
}

body.site-page[data-text-contrast-method="enhance"] [data-text-tone="dark"] {
  --local-title-color: #f8fafc;
  --local-muted-color: #dbe7f4;
  --local-control-color: #f8fafc;
  --local-contrast-overlay: rgba(0, 0, 0, 0.14);
}
body.site-page[data-text-contrast-method="enhance"] [data-text-tone="light"] {
  --local-title-color: #111827;
  --local-muted-color: #334155;
  --local-control-color: #111827;
  --local-contrast-overlay: rgba(255, 255, 255, 0.2);
}
body.site-page[data-text-contrast-method="enhance"][data-text-contrast="primary"] .nav-item[data-text-tone] .nav-name,
body.site-page[data-text-contrast-method="enhance"][data-text-contrast="primary"] .nav-section-title[data-text-tone],
body.site-page[data-text-contrast-method="enhance"][data-text-contrast="full"] .nav-item[data-text-tone] .nav-name,
body.site-page[data-text-contrast-method="enhance"][data-text-contrast="full"] .nav-section-title[data-text-tone] {
  color: var(--local-title-color) !important;
}
body.site-page[data-text-contrast-method="enhance"][data-text-contrast="full"] .nav-item[data-text-tone] p,
body.site-page[data-text-contrast-method="enhance"][data-text-contrast="full"] .search-box[data-text-tone] .search-input,
body.site-page[data-text-contrast-method="enhance"][data-text-contrast="full"] .search-box[data-text-tone] .search-input::placeholder {
  color: var(--local-muted-color) !important;
}
body.site-page[data-text-contrast-method="enhance"][data-text-contrast="full"] .search-engine[data-text-tone] .search-engine-option,
body.site-page[data-text-contrast-method="enhance"][data-text-contrast="full"] .header-menu a[data-text-tone] {
  color: var(--local-control-color) !important;
}
body.site-page:not([data-card-opacity-level="transparent"])[data-text-contrast-method="enhance"][data-text-contrast="primary"] .nav-item[data-text-tone],
body.site-page:not([data-card-opacity-level="transparent"])[data-text-contrast-method="enhance"][data-text-contrast="primary"] .nav-section-title[data-text-tone],
body.site-page:not([data-card-opacity-level="transparent"])[data-text-contrast-method="enhance"][data-text-contrast="full"] .nav-item[data-text-tone],
body.site-page:not([data-card-opacity-level="transparent"])[data-text-contrast-method="enhance"][data-text-contrast="full"] .nav-section-title[data-text-tone],
body.site-page:not([data-card-opacity-level="transparent"])[data-text-contrast-method="enhance"][data-text-contrast="full"] .search-box[data-text-tone],
body.site-page:not([data-card-opacity-level="transparent"])[data-text-contrast-method="enhance"][data-text-contrast="full"] .search-engine[data-text-tone] {
  background-image: linear-gradient(var(--local-contrast-overlay), var(--local-contrast-overlay)) !important;
}

body.site-page[data-text-contrast="full"] .nav-name,
body.site-page[data-text-contrast="full"] .nav-section-title,
body.site-page[data-text-contrast="full"] .nav-item p,
body.site-page[data-text-contrast="full"] .search-input,
body.site-page[data-text-contrast="full"] .header-menu a {
  text-shadow: 0 1px 2px rgba(0, 0, 0, 0.18);
}

body.site-page[data-text-shadow="on"] {
  --text-shadow-normal:
    0 2px 2px rgba(15, 23, 42, 0.3),
    0 6px 14px rgba(15, 23, 42, 0.16);
}
body.site-page[data-theme="dark"][data-text-shadow="on"] {
  --text-shadow-normal:
    0 2px 2px rgba(0, 0, 0, 0.62),
    0 6px 14px rgba(0, 0, 0, 0.36);
}
body.site-page[data-text-shadow="on"] .header .site,
body.site-page[data-text-shadow="on"] .header-menu a,
body.site-page[data-text-shadow="on"] .nav-name,
body.site-page[data-text-shadow="on"] .nav-section-title,
body.site-page[data-text-shadow="on"] .nav-item p,
body.site-page[data-text-shadow="on"] .bookmark-empty,
body.site-page[data-text-shadow="on"] .bookmark-info-panel p,
body.site-page[data-text-shadow="on"] .search-input,
body.site-page[data-text-shadow="on"] .search-input::placeholder,
body.site-page[data-text-shadow="on"] .search-engine-option {
  text-shadow: var(--text-shadow-normal);
}

body.site-page[data-text-shadow="enhance"] {
  --text-shadow-enhance:
    0 2px 4px rgba(15, 23, 42, 0.24),
    0 0 12px rgba(255, 255, 255, 0.18);
}
body.site-page[data-theme="dark"][data-text-shadow="enhance"] {
  --text-shadow-enhance:
    0 2px 4px rgba(0, 0, 0, 0.46),
    0 0 14px rgba(148, 163, 184, 0.16);
}
body.site-page[data-text-shadow="enhance"] .header .site,
body.site-page[data-text-shadow="enhance"] .header-menu a,
body.site-page[data-text-shadow="enhance"] .nav-name,
body.site-page[data-text-shadow="enhance"] .nav-section-title,
body.site-page[data-text-shadow="enhance"] .nav-item p,
body.site-page[data-text-shadow="enhance"] .bookmark-empty,
body.site-page[data-text-shadow="enhance"] .bookmark-info-panel p,
body.site-page[data-text-shadow="enhance"] .search-input,
body.site-page[data-text-shadow="enhance"] .search-input::placeholder,
body.site-page[data-text-shadow="enhance"] .search-engine-option {
  text-shadow: var(--text-shadow-enhance, var(--text-shadow-normal, 0 1px 1px rgba(15, 23, 42, 0.18)));
}

body.site-page[data-text-bold="on"] .header .site,
body.site-page[data-text-bold="on"] .header-menu a,
body.site-page[data-text-bold="on"] .nav-name,
body.site-page[data-text-bold="on"] .nav-section-title {
  font-weight: 800;
}

body.site-page[data-text-bold="on"] .nav-item p,
body.site-page[data-text-bold="on"] .bookmark-empty,
body.site-page[data-text-bold="on"] .bookmark-info-panel p,
body.site-page[data-text-bold="on"] .search-input,
body.site-page[data-text-bold="on"] .search-input::placeholder,
body.site-page[data-text-bold="on"] .search-engine-option {
  font-weight: 700;
}