/* ======================================================
 * superBrain custom.css
 * 对照 https://superq314.github.io/tags/Butterfly/ 四篇教程整合：
 *   - Butterfly主题-初始配置 / 美化 / 优化 / 标签外挂
 * 并借鉴 haiyong.site 的社交图标大圆按钮 UI
 * ====================================================== */

/* ---------- 0. 首页社交图标：圆形按钮 + 白色图标（参考截图样式） ---------- */
/* 精修：首屏只保留大标题，社交图标统一放在侧边栏作者卡，避免首屏拥挤 */
#page-header #site_social_icons {
  display: none !important;
}
#page-header #site_social_icons .social-icon {
  display: inline-flex !important;
  align-items: center;
  justify-content: center;
  width: 44px !important;
  height: 44px !important;
  border-radius: 50% !important;
  margin: 0 !important;
  color: #fff !important;
  font-size: 22px !important;
  text-shadow: 0 1px 4px rgba(0,0,0,0.4);
  transition: transform 0.25s ease, background 0.25s ease;
  text-decoration: none;
}
#page-header #site_social_icons .social-icon:hover {
  transform: translateY(-4px);
}
#page-header #site_social_icons .social-icon i,
#page-header #site_social_icons .social-icon::before {
  color: #fff !important;
  font-size: 22px !important;
}
/* GitHub 黑底白猫 */
#page-header #site_social_icons .social-icon:nth-child(1) {
  background: rgba(0,0,0,0.55) !important;
  backdrop-filter: blur(4px);
}
/* Email / QQ / 知乎：透明背景，白色图标 */
#page-header #site_social_icons .social-icon:nth-child(2),
#page-header #site_social_icons .social-icon:nth-child(3),
#page-header #site_social_icons .social-icon:nth-child(4) {
  background: transparent !important;
}

/* 微信号胶囊按钮（精修：首屏隐藏，微信信息保留在侧边栏公告卡） */
#wechat-capsule {
  display: none !important;
}
#wechat-capsule:hover {
  background: rgba(255, 255, 255, 0.25);
}
#wechat-capsule i {
  font-size: 18px;
}

/* ---------- 1. 滚动条（优化篇 §1.2） ---------- */
::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}
::-webkit-scrollbar-track {
  background-color: rgba(126, 150, 184, 0.18);
  border-radius: 2em;
}
::-webkit-scrollbar-thumb {
  background-color: #7e96b8;
  background-image: -webkit-linear-gradient(
    45deg,
    rgba(255, 255, 255, 0.35) 25%,
    transparent 25%,
    transparent 50%,
    rgba(255, 255, 255, 0.35) 50%,
    rgba(255, 255, 255, 0.35) 75%,
    transparent 75%,
    transparent
  );
  border-radius: 2em;
}
::-webkit-scrollbar-corner {
  background-color: transparent;
}
::-moz-selection {
  color: #fff;
  background-color: #7e96b8;
}
::selection {
  color: #fff;
  background-color: #7e96b8;
}

/* ---------- 2. 全局背景（鲸鱼星空全屏固定背景） ---------- */
#web_bg {
  background: url(https://s2.loli.net/2022/04/11/oDZPBRxHn59rbYO.jpg) no-repeat center center fixed !important;
  background-size: cover !important;
}
[data-theme="dark"] #web_bg {
  background: url(https://s2.loli.net/2022/04/11/oDZPBRxHn59rbYO.jpg) no-repeat center center fixed !important;
  background-size: cover !important;
}

/* ---------- 3. 卡片 / 文章页背景（精修：蓝灰、接近不透明，保证在星空背景上清晰可读） ---------- */
.layout_post > #post,
#aside-content .card-widget,
#recent-posts > .recent-post-item,
.layout_page > div:first-child:not(.recent-posts),
.layout_post > #page,
.read-mode .layout_post > #post {
  background: rgba(236, 240, 246, 0.86);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}
[data-theme="dark"] .layout_post > #post,
[data-theme="dark"] #aside-content .card-widget,
[data-theme="dark"] #recent-posts > .recent-post-item,
[data-theme="dark"] .layout_page > div:first-child:not(.recent-posts),
[data-theme="dark"] .layout_post > #page {
  background: rgba(18, 24, 36, 0.82);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}

/* ---------- 4. 头像圆形 / 公告居中 ---------- */
#aside-content .card-info .avatar-img img,
#sidebar #sidebar-menus .avatar-img img {
  border-radius: 50%;
}
.card-widget.card-announcement {
  margin: 0;
  align-items: center;
  justify-content: center;
  text-align: center;
}

/* ---------- 5. 站点标题字体 ---------- */
#site-title {
  /* 原写法 'Titillium Web', sans-serif 没有中文回退，
   * 中文标题会落到浏览器默认衬线体，与全站字体断裂。 */
  font-family: var(--font-ui);
  letter-spacing: 2px;
}

/* ---------- 6. 首页文章卡片 hover 上浮 ---------- */
#recent-posts > .recent-post-item {
  transition: all 0.3s ease;
}
#recent-posts > .recent-post-item:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.12);
}

/* ---------- 7. 页脚装饰 ------------- */
/* 注意：主题 Butterfly 5.x 页脚【不存在】#footer-wrap，也不存在 #heartbeat，
 * 原 `#footer #footer-wrap #heartbeat` 选择器与配套的 @keyframes heartbeat
 * 永远匹配不到 / 永不生效，属于死代码，已一并移除。
 * 页脚的实际装饰统一由 .footer-butterfly（见下方小节）承担。 */

/* ---------- 8. 文章内联颜色块（美化篇 §12.1） ---------- */
span#inline-yellow,
span#inline-green,
span#inline-blue,
span#inline-purple {
  display: inline;
  padding: .2em .6em .3em;
  font-size: 80%;
  font-weight: bold;
  line-height: 1;
  color: #fff;
  text-align: center;
  white-space: nowrap;
  vertical-align: baseline;
  border-radius: .3em;
}
span#inline-yellow { background-color: #f0ad4e; }
span#inline-green  { background-color: #5cb85c; }
span#inline-blue   { background-color: #2780e3; }
span#inline-purple { background-color: #9954bb; }

/* ---------- 9. 下载按钮样式（美化篇 §12.2） ---------- */
a#download {
  display: inline-block;
  padding: 0 10px;
  color: var(--font-color);
  background: transparent;
  border: 2px solid var(--font-color);
  border-radius: 2px;
  transition: all .5s ease;
  font-weight: bold;
  text-decoration: none;
}
a#download:hover {
  background: var(--font-color);
  color: #fff;
}

/* ---------- 10. 启动加载动画（精修：蓝灰） ---------- */
#loading-box .loading-img,
#loading-box .loader {
  border-top-color: #7e96b8;
}

/* ---------- 11. 导航栏标题栏在深色模式下的过渡 ---------- */
#nav {
  transition: background-color 0.3s ease, box-shadow 0.3s ease;
}

/* ---------- 12. 右下角工具栏按钮 hover 动效 ---------- */
#rightside button,
#rightside a {
  transition: all 0.3s ease;
}
#rightside button:hover,
#rightside a:hover {
  transform: scale(1.1);
}

/* ---------- 13. 强制右下角工具栏始终可见 ---------- */
#rightside {
  opacity: 1 !important;
  transform: translateZ(0) !important;
}
#rightside #rightside-config-hide,
#rightside #rightside-config-show {
  display: flex !important;
}

/* ---------- 14. live2d 小猫与音乐播放器层级 ---------- */
/* 层级刻度定义见 custom_nav.css :root（--z-*）；此处带兜底值 */
#live2dcanvas,
#L2Dwidget {
  z-index: var(--z-live2d, 70) !important;
}
.aplayer.aplayer-fixed.aplayer-narrow .aplayer-body {
  z-index: var(--z-dropdown, 50) !important;
}

/* ======================================================
 * fixed card widget（参考 akilar.top/posts/451ac5f8/）
 * 手机端左侧边缘悬浮按钮，点击居中弹出侧栏卡片
 * ====================================================== */

/* 弹出卡片：垂直居中固定定位 */
.fixed-card-widget:not(#card-toc) {
  visibility: visible !important;
  display: block !important;
  position: fixed !important;
  bottom: 0;
  left: 0;
  top: 0;
  right: 0;
  margin: auto;
  max-width: 300px;
  max-height: 500px;
  width: auto;
  height: auto;
  overflow-y: scroll;
  z-index: var(--z-card-float, 40);
  animation: rotateX 0.5s ease;
  animation-fill-mode: forwards;
}
.fixed-card-widget:not(#card-toc)::-webkit-scrollbar {
  width: 0;
}

/* 标签云卡片适配 */
.card-tags.fixed-card-widget .card-tag-cloud {
  max-height: 460px;
  overflow: scroll;
}
.card-tags.fixed-card-widget .card-tag-cloud::-webkit-scrollbar {
  display: none;
}

/* 手机端才显示悬浮按钮组 */
div#fixedcard-dashboard {
  display: none;
}
@media screen and (max-width: 768px) {
  div#fixedcard-dashboard {
    display: flex !important;
    position: fixed;
    top: 150px;
    left: 0;
    width: fit-content;
    height: 40px;
    opacity: 0.3;
    transition: all 0.5s;
    background: rgba(255, 255, 255, 0.9);
    padding: 5px 10px;
    border-top-right-radius: 20px;
    border-bottom-right-radius: 20px;
    z-index: var(--z-card-float, 40);
    flex-direction: column;
    height: auto;
    width: 40px;
    align-items: center;
  }
  div#fixedcard-dashboard:hover {
    opacity: 1;
  }
  div#fixedcard-dashboard button {
    width: 30px !important;
    height: 30px !important;
    margin: 4px 0;
    display: flex !important;
    opacity: 1 !important;
    pointer-events: all !important;
    color: #757273;
    background: transparent;
    border: none;
    align-items: center;
    justify-content: center;
  }
  [data-theme="dark"] div#fixedcard-dashboard {
    background: rgba(55, 55, 55, 0.9);
  }
  [data-theme="dark"] div#fixedcard-dashboard button {
    color: #bcbdbd;
  }
}

/* 卡片开启动画 */
@keyframes rotateX {
  from { transform: rotateX(90deg); }
  to { transform: rotateX(0deg); }
}

/* 遮罩层（fixed-card-widget 弹出时的全屏蒙层） */
div#quit-box {
  position: fixed;
  display: block;
  left: 0;
  top: 0;
  width: 100vw;
  height: 100vh;
  z-index: var(--z-overlay, 100);
  background: rgba(25, 25, 25, 0.3);
}
[data-theme="dark"] div#quit-box {
  background: rgba(147, 146, 128, 0.3);
}

/* ======================================================
 * 相关推荐版块卡片化（参考 akilar.top/posts/194e1534/）
 * 把 .relatedPosts 从突兀的全宽块改成圆角卡片
 * ====================================================== */
.relatedPosts {
  margin: 2rem 0 !important;
  padding: 1.5rem 1.2rem !important;
  background: var(--card-bg) !important;
  border-radius: 12px !important;
  box-shadow: var(--card-box-shadow) !important;
  transition: box-shadow 0.3s ease;
}
.relatedPosts:hover {
  box-shadow: var(--card-hover-box-shadow) !important;
}
.relatedPosts > .headline {
  display: flex;
  align-items: center;
  margin-bottom: 1rem;
  padding-bottom: 0.6rem;
  border-bottom: 1px solid var(--light-grey);
  font-size: 1.1em;
  font-weight: bold;
}
.relatedPosts > .headline i {
  margin-right: 8px;
  color: var(--btn-color);
}
.relatedPosts .relatedPosts-list {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 12px;
}
.relatedPosts .relatedPosts-list > div {
  border-radius: 8px;
  overflow: hidden;
  transition: transform 0.25s ease, box-shadow 0.25s ease;
  background: var(--content-bg);
}
.relatedPosts .relatedPosts-list > div:hover {
  transform: translateY(-4px);
  box-shadow: 0 6px 16px rgba(0,0,0,0.15);
}
.relatedPosts .relatedPosts-list .cover {
  width: 100%;
  height: 120px;
  object-fit: cover;
  display: block;
}
.relatedPosts .relatedPosts-list .title {
  display: block;
  padding: 8px 10px;
  font-size: 0.9em;
  line-height: 1.4;
  color: var(--font-color);
}
.relatedPosts .relatedPosts-list .date {
  display: block;
  padding: 0 10px 8px;
  font-size: 0.75em;
  color: var(--second-font-color);
}

/* ---------- 13. 右侧功能按钮默认展开（不再藏进齿轮） ---------- */
#rightside #rightside-config-hide {
  display: flex !important;
  flex-direction: column;
  opacity: 1 !important;
  visibility: visible !important;
  transform: translateX(0) !important;
  pointer-events: auto !important;
}

/* ---------- 14. 首页 banner 大图上方导航栏透明覆盖 ---------- */
#page-header.full_page {
  background-size: cover;
  background-position: center;
}
[data-theme="dark"] #page-header #site-info,
[data-theme="dark"] #page-header #site-title,
[data-theme="dark"] #page-header #site-subtitle {
  color: #fff;
}

/* ======================================================
 * 侧栏卡片标题栏：改用参考站风格（圆角卡片 + 标题下分界线）
 * 详见 custom_nav.css 的门卡样式区；此处不再使用 SAO 梯形标题
 * ====================================================== */

/* ======================================================
 * 左上角标题悬停显示描述（参考 akilar.top/posts/23fdf850/）
 * ====================================================== */
a#site-name:hover:before {
  position: fixed;
  width: fit-content;
  margin: auto;
  left: 0;
  right: 0;
  top: 12%;
  border-radius: 10px;
  text-align: center;
  z-index: var(--z-dropdown, 50);
  content: attr(data-title);
  font-size: 18px;
  color: #fff;
  padding: 12px 20px;
  background-color: rgba(0, 0, 0, 0.75);
  backdrop-filter: blur(8px);
  max-width: 600px;
}
@media screen and (max-width: 768px) {
  a#site-name {
    max-width: 200px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    display: inline-block;
    vertical-align: middle;
  }
}

/* ======================================================
 * Ironheart 钢铁之心加载动画（参考 akilar.top/posts/3d221bf2/）
 * ====================================================== */
#ironheart-loader {
  position: fixed;
  inset: 0;
  z-index: var(--z-loader, 100);
  background: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: opacity 0.6s ease, visibility 0.6s ease;
}
#ironheart-loader.hidden {
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
}
.ironheart-box {
  position: relative;
  width: 120px;
  height: 120px;
}
.ironheart-ring {
  position: absolute;
  inset: 0;
  border: 3px solid transparent;
  border-radius: 50%;
}
.ironheart-ring.r1 {
  border-top-color: #49b1f5;
  border-right-color: #49b1f5;
  animation: ironheart-spin 1.2s linear infinite;
}
.ironheart-ring.r2 {
  inset: 15px;
  border-bottom-color: #ff7242;
  border-left-color: #ff7242;
  animation: ironheart-spin-rev 1.8s linear infinite;
}
.ironheart-core {
  position: absolute;
  inset: 40px;
  background: linear-gradient(135deg, #49b1f5, #ff7242);
  border-radius: 50%;
  animation: ironheart-pulse 1.5s ease-in-out infinite;
}
.ironheart-text {
  position: absolute;
  bottom: -40px;
  width: 100%;
  text-align: center;
  font-size: 14px;
  color: #999;
  letter-spacing: 2px;
}
[data-theme="dark"] #ironheart-loader {
  background: #1a1a2e;
}
@keyframes ironheart-spin {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}
@keyframes ironheart-spin-rev {
  from { transform: rotate(360deg); }
  to { transform: rotate(0deg); }
}
@keyframes ironheart-pulse {
  0%, 100% { transform: scale(1); opacity: 1; }
  50% { transform: scale(0.8); opacity: 0.7; }
}

/* ======================================================
 * Banner 鼠标视差效果（参考 akilar.top/posts/780a2cea/）
 * ====================================================== */
#page-header {
  transition: background-position 0.3s ease-out;
}
@media (max-width: 768px) {
  #page-header { transition: none !important; }
}

/* ======================================================
 * 顶栏导航按钮样式已迁移至 custom_nav.css（圆角半透明胶囊）
 * 此处移除旧的菱形切角规则，避免与原 #nav 遗留规则冲突
 * ====================================================== */

/* ======================================================
 * 页脚振翅蝴蝶动画
 * 完整规则已统一到下方「页脚蝴蝶」小节（使用 4 片翅膀的真实结构）。
 * 此处不再重复定义，避免与新版 ::before/::after 分工冲突。
 * ====================================================== */

/* ======================================================
 * 原 Butterfly #nav 已由自定义顶栏 (#menu-container) 完全替代
 * 隐藏式顶栏（#nav-toggle-bar / #nav-bridge / hidden_nav.js）已整体移除：
 *   - 这两处 DOM 从未被主题或自定义脚本注入，规则是死代码；
 *   - 对应交互脚本 source/js/custom/hidden_nav.js 已删除。
 * 顶栏结构与层级统一见 custom_nav.css。
 * ====================================================== */

/* ======================================================
 * 首页文章轮播右侧圆点分页（复刻 superq314.github.io）
 * 普通点：11×11 半透明灰圆；激活点：11×30 竖条
 * ====================================================== */
.blog-slider__pagination {
  position: absolute !important;
  right: 20px !important;
  top: 100px !important;
  width: 11px !important;
}
.blog-slider__pagination .swiper-pagination-bullet {
  width: 11px !important;
  height: 11px !important;
  border-radius: 10px !important;
  margin: 8px 0 !important;
  background: rgba(133, 133, 133, 0.35) !important;
  opacity: 1 !important;
  transition: height 0.3s ease, background 0.3s ease !important;
}
.blog-slider__pagination .swiper-pagination-bullet-active {
  height: 30px !important;
  background: rgba(255, 255, 255, 0.9) !important;
}
[data-theme="dark"] .blog-slider__pagination .swiper-pagination-bullet-active {
  background: rgba(255, 255, 255, 0.9) !important;
}

/* ======================================================
 * 全局固定背景：鲸鱼星空图始终铺满整个页面（参考 superq314.github.io）
 * ====================================================== */
body {
  background: url('https://s2.loli.net/2022/04/11/oDZPBRxHn59rbYO.jpg') no-repeat center center fixed !important;
  background-size: cover !important;
}
#body-wrap,
#footer,
#page-header.full_page,
.layout_page,
#article-container,
#aside-content .card-widget {
  background: transparent !important;
}
#aside-content .card-widget {
  background: rgba(18, 24, 36, 0.82) !important;
  backdrop-filter: blur(12px);
}
[data-theme]:not([data-theme="dark"]) #aside-content .card-widget {
  background: rgba(236, 240, 246, 0.88) !important;
}

/* 公告栏样式 */
#aside-content .card-announcement {
  /* 原为 16px，与其它侧栏卡（--r-card=8px）不一致；统一到刻度 */
  border-radius: var(--r-card) !important;
}
#aside-content .card-announcement::before,
#aside-content .card-announcement .card-background::before {
  display: none !important;
}
#aside-content .card-announcement .item-headline {
  font-size: 18px;
  font-weight: bold;
  padding-bottom: 8px;
  margin-bottom: 12px;
}
#aside-content .card-announcement .item-headline i {
  color: #ff4757;
}
#aside-content .card-announcement .announcement_content {
  line-height: 2;
  text-align: center;
  /* 配置里用 YAML 的 |- （strip 模式）书写，末尾不会带换行符，
     因此这里可以放心用 pre-line：只有行间换行折行，末尾不留空行。 */
  white-space: pre-line;
}

/* ------------------------------------------------------
 * 公告卡长句横向滚动（无缝循环 marquee）
 * 卡片宽度不变，仅在 .biko-marquee 这一行内部横向滚动。
 * 轨道内容由配置复制两份，位移 -50% 即一个完整周期，首尾无缝衔接。
 * ------------------------------------------------------ */
#aside-content .card-announcement .announcement_content .biko-marquee {
  display: block;
  width: 100%;
  max-width: 100%;
  overflow: hidden;
  white-space: nowrap;
  /* 父级 .announcement_content 的 line-height: 2 会让本行行盒高出行内文字整整一倍，
     跑马灯文字靠 align-items:center 竖直居中后，上下各留半个行高的空白，
     看上去就像「这一行下面多了一条空行」。
     这里把行高收回到 1.2，只压紧跑马灯这一行，其余 4 行的行距维持不变。 */
  line-height: 1.2;
  /* 两侧渐隐遮罩，滚出/滚入更自然（不支持 mask 的浏览器自动降级为硬边） */
  -webkit-mask-image: linear-gradient(90deg, transparent 0, #000 12px, #000 calc(100% - 12px), transparent 100%);
  mask-image: linear-gradient(90deg, transparent 0, #000 12px, #000 calc(100% - 12px), transparent 100%);
}
#aside-content .card-announcement .announcement_content .biko-marquee__track {
  display: inline-flex;
  flex-wrap: nowrap;
  align-items: center;
  width: max-content;
  animation: biko-marquee-scroll 14s linear infinite;
}
#aside-content .card-announcement .announcement_content .biko-marquee__item {
  flex: 0 0 auto;
  white-space: nowrap;
  /* 复制份与正文之间留出可见的循环间隔 */
  padding-right: 56px;
  /* 流动彩色文字：原先写在 HTML 内联样式里，两处重复且难维护，现统一到此处 */
  background: linear-gradient(90deg, #ff6b6b, #feca57, #48dbfb, #ff9ff3, #ff6b6b);
  background-size: 200% auto;
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent; /* 旧浏览器 background-clip:text 不支持时退化为透明，配合下方兜底 */
  font-weight: bold;
  animation: shine 3s linear infinite;
}
/* 不支持 background-clip:text 的浏览器：去掉透明填充，避免文字不可见 */
@supports not ((-webkit-background-clip: text) or (background-clip: text)) {
  #aside-content .card-announcement .announcement_content .biko-marquee__item {
    background: none;
    -webkit-text-fill-color: currentColor;
    color: #ff6b6b;
    animation: none;
  }
}
/* 鼠标悬停/键盘聚焦时暂停，便于阅读；触屏端不受影响 */
#aside-content .card-announcement .announcement_content .biko-marquee:hover .biko-marquee__track,
#aside-content .card-announcement .announcement_content .biko-marquee:focus-within .biko-marquee__track {
  animation-play-state: paused;
}
@keyframes biko-marquee-scroll {
  from { transform: translateX(0); }
  to { transform: translateX(-50%); }
}
/* 尊重系统「减少动态效果」偏好：关闭滚动，改为可手动横向滑动 */
@media (prefers-reduced-motion: reduce) {
  #aside-content .card-announcement .announcement_content .biko-marquee {
    overflow-x: auto;
    -webkit-mask-image: none;
    mask-image: none;
  }
  #aside-content .card-announcement .announcement_content .biko-marquee__track {
    animation: none;
  }
}
/* ------------------------------------------------------
 * 页脚蝴蝶：主题 Butterfly 5.x 页脚结构为
 *   #footer > .footer-other > .footer-copyright > .copyright
 * 主题本身【没有】#footer-wrap，也没有任何内置蝴蝶图标。
 * 旧规则 `#footer-wrap .footer-butterfly { display:none }` 是死代码：
 * 选择器永远匹配不到，因此既没隐藏掉下面这段自绘蝴蝶，也没修复它。
 * 这里改为按真实 DOM 选择器，并把两只「半圆扇叶」重绘为真正的蝴蝶：
 *   - 左右各两对翅膀（前后翅），大小/角度不同 → 有翅形层次
 *   - 身体用中间竖线 + 触角，避免只看到两片蓝色半圆
 * ------------------------------------------------------ */
.footer-butterfly {
  display: inline-block;
  position: relative;
  width: 22px;
  height: 18px;
  margin: 0 4px;
  vertical-align: -3px;
  /* 蝴蝶本体之外不拦截点击 */
  pointer-events: none;
}

/* 身体（中间竖线） */
.footer-butterfly::before {
  content: '';
  position: absolute;
  left: 50%;
  top: 3px;
  width: 2px;
  height: 12px;
  margin-left: -1px;
  border-radius: 1px;
  background: linear-gradient(180deg, #4c6b96, #2f4566);
}

/* 触角 */
.footer-butterfly::after {
  content: '';
  position: absolute;
  left: 50%;
  top: 0;
  width: 10px;
  height: 6px;
  margin-left: -5px;
  border-top: 1.5px solid #4c6b96;
  border-radius: 50%;
  border-left: 1.5px solid transparent;
  border-right: 1.5px solid transparent;
  box-sizing: border-box;
}

/* 四片翅膀：用两个子元素 + 各自伪元素拼出前后翅 */
.footer-butterfly > i {
  position: absolute;
  top: 2px;
  width: 10px;
  height: 14px;
  background: linear-gradient(135deg, #6fa9d8, #4c6b96);
  transform-origin: right center;
  animation: butterfly-flap-l 0.5s ease-in-out infinite alternate;
}
.footer-butterfly > i:nth-child(1) {
  left: 0;
  border-radius: 60% 40% 45% 55% / 55% 60% 40% 45%;
}
/* 后翅：更小、更淡、相位略错开 */
.footer-butterfly > i:nth-child(2) {
  left: 1px;
  top: 8px;
  width: 7px;
  height: 8px;
  opacity: 0.85;
  border-radius: 55% 45% 50% 50% / 50% 55% 45% 50%;
  animation-duration: 0.5s;
  animation-delay: -0.12s;
}
.footer-butterfly > i:nth-child(3) {
  right: 0;
  left: auto;
  transform-origin: left center;
  background: linear-gradient(225deg, #6fa9d8, #4c6b96);
  border-radius: 40% 60% 55% 45% / 60% 55% 45% 40%;
  animation-name: butterfly-flap-r;
}
.footer-butterfly > i:nth-child(4) {
  right: 1px;
  left: auto;
  top: 8px;
  width: 7px;
  height: 8px;
  opacity: 0.85;
  transform-origin: left center;
  background: linear-gradient(225deg, #6fa9d8, #4c6b96);
  border-radius: 45% 55% 50% 50% / 55% 50% 50% 45%;
  animation-name: butterfly-flap-r;
  animation-delay: -0.12s;
}

@keyframes butterfly-flap-l {
  from { transform: rotateY(0deg) scaleX(1) rotate(-6deg); }
  to   { transform: rotateY(58deg) scaleX(0.62) rotate(-6deg); }
}
@keyframes butterfly-flap-r {
  from { transform: rotateY(0deg) scaleX(1) rotate(6deg); }
  to   { transform: rotateY(-58deg) scaleX(0.62) rotate(6deg); }
}

/* 尊重「减少动态效果」偏好：停止振翅，保留静态蝴蝶 */
@media (prefers-reduced-motion: reduce) {
  .footer-butterfly > i {
    animation: none;
  }
}

[data-theme="dark"] .footer-butterfly > i {
  background: linear-gradient(135deg, #7fb0e0, #5a6fa0);
}
[data-theme="dark"] .footer-butterfly::before {
  background: linear-gradient(180deg, #7fb0e0, #4a5f8a);
}

/* 右下角齿轮面板：模式切换按钮图标由 nav.js 统一用 SVG（#modeicon）控制，
   此处只做尺寸规整，不再用 ::before 注入字体图标（避免与顶栏图标不一致） */
#rightside-config-show button[title*="dark"],
#rightside-config-show button[title*="night"] {
  font-size: 18px !important;
}
#rightside-config-show button[title*="dark"]::before,
#rightside-config-show button[title*="night"]::before {
  content: none !important;
  display: none !important;
}
#rightside-config-show button[title*="dark"] i,
#rightside-config-show button[title*="night"] i {
  font-size: 16px !important;
}

@keyframes shine {
  to { background-position: 200% center; }
}

/* ======================================================
 * 侧栏卡片：统一为参考站（superq314.github.io）圆角卡片 + 标题下分界线
 * 范围：公告 / 分类 / 标签 / 归档 / 网站信息（只改视觉，不动内容）
 * 主题色交由主题变量(--card-bg)控制，深浅色自适配
 * ====================================================== */
#aside-content .card-announcement,
#aside-content .card-categories,
#aside-content .card-tags,
#aside-content .card-archives,
#aside-content .card-webinfo {
  position: relative !important;
  margin-top: 16px !important;
  padding: 20px 24px !important;
  border: 0 !important;
  border-radius: var(--r-card) !important;
  font-family: var(--font-ui) !important;
  background: var(--card-bg) !important;
  box-shadow: rgba(7, 17, 27, .05) 0 3px 8px 6px !important;
  overflow: hidden;
}
/* 清除卡片伪元素背景 */
#aside-content .card-announcement::before,
#aside-content .card-categories::before,
#aside-content .card-tags::before,
#aside-content .card-archives::before,
#aside-content .card-webinfo::before,
#aside-content .card-announcement::after,
#aside-content .card-categories::after,
#aside-content .card-tags::after,
#aside-content .card-archives::after,
#aside-content .card-webinfo::after { content: none !important; display: none !important; }

/* 标题：内流式 + 标题与内容之间一条分界线（清除 SAO 梯形悬浮标题） */
#aside-content .card-announcement .item-headline,
#aside-content .card-categories .item-headline,
#aside-content .card-tags .item-headline,
#aside-content .card-archives .item-headline,
#aside-content .card-webinfo .item-headline {
  position: static !important;
  top: auto !important; left: auto !important;
  width: auto !important; height: auto !important;
  display: flex !important; align-items: center; gap: 8px;
  margin: 0 0 12px !important;
  padding: 0 0 8px !important;
  background: transparent !important;
  border: 0 !important;
  border-bottom: 1px solid var(--light-grey, #e3e8f7) !important;
  font-family: inherit !important;
  font-size: 16px !important;
  font-weight: 700 !important;
  color: var(--font-color) !important;
}
#aside-content .card-announcement .item-headline i,
#aside-content .card-categories .item-headline i,
#aside-content .card-tags .item-headline i,
#aside-content .card-archives .item-headline i,
#aside-content .card-webinfo .item-headline i { color: #7e96b8 !important; }
[data-theme="dark"] #aside-content .card-announcement .item-headline,
[data-theme="dark"] #aside-content .card-categories .item-headline,
[data-theme="dark"] #aside-content .card-tags .item-headline,
[data-theme="dark"] #aside-content .card-archives .item-headline,
[data-theme="dark"] #aside-content .card-webinfo .item-headline {
  color: rgba(255, 255, 255, .85) !important;
  border-bottom-color: rgba(255, 255, 255, .12) !important;
}
#aside-content .card-announcement .item-headline::before,
#aside-content .card-categories .item-headline::before,
#aside-content .card-tags .item-headline::before,
#aside-content .card-archives .item-headline::before,
#aside-content .card-webinfo .item-headline::before,
#aside-content .card-announcement .item-headline::after,
#aside-content .card-categories .item-headline::after,
#aside-content .card-tags .item-headline::after,
#aside-content .card-archives .item-headline::after,
#aside-content .card-webinfo .item-headline::after { content: none !important; display: none !important; }

/* ======================================================
 * 历史上的今天卡片（history.js 注入）
 * 原先是行内硬编码 height:200px / 50px / -50px，现在样式在此集中定义，
 * 单条高度与视口高度由 history.js 实测写入 --bh-item-h / --bh-view-h。
 * ====================================================== */
#history-card-widget #history-news {
  height: var(--bh-view-h, 200px);
  overflow: hidden;
}
#history-card-widget #history-card {
  list-style: none;
  margin: 0;
  padding-inline-start: 0;
}
#history-card-widget #history-card > li {
  list-style: none;
  height: var(--bh-item-h, 50px);
  overflow: hidden;
  margin-bottom: 4px;
}
#history-card-widget .bh-year {
  color: #858;
  font-style: italic;
  font-weight: lighter;
  font-size: 12px;
  margin: 0;
  padding: 0;
}
#history-card-widget .bh-title {
  font-size: 13px;
  line-height: 1.35;
  margin: 0;
  padding: 0;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
[data-theme="dark"] #history-card-widget .bh-year { color: #b9a7c4; }
[data-theme="dark"] #history-card-widget .bh-title { color: rgba(255, 255, 255, .82); }

/* ======================================================
 * 侧栏电子钟卡片（_config.butterfly.yml: electric_clock → /clock/*）
 *
 * 结构（由主题插件注入，勿改）：
 *   .card-widget.card-clock
 *     └ .card-glass > .card-background      ← 上游自带的内层凹槽面板
 *         └ .card-content > #hexo_electric_clock
 *             └ .clock-row × 3（日期/天气/湿度、时间、IP/地点/AM-PM）
 *
 * 原实现（上游 clock.css / clock.min.css）的三个硬伤：
 *   1) 双层内边距叠加：.card-background 自带 margin:15px、#hexo_electric_clock
 *      又自带 padding:20px，外层卡片还有 padding:20px 24px。
 *      实测内层面板宽仅 211px，而 clock-row 内容实测 241px → 右侧文字被裁掉。
 *   2) .card-background 写死 height:153px，与外层卡片高度无关，
 *      实测卡片 223px、面板 153px，底部空出 35px 死区，观感上下不匀。
 *   3) .clock-row 指定 font-family:UnidreamLED，该字体来自
 *      unpkg.zhimg.com（已失效）→ 回退到系统字体，全站字体断裂；
 *      且 line-height:28px 载不住 38px 的时间数字。
 *
 * 因此这里做两件事：
 *   - 拆掉上游的凹槽面板与双层内边距，统一到全站卡片刻度
 *     （--r-card / --card-bg / --font-ui / --box-shadow），深浅色自适配；
 *   - 把「日期+天气+湿度」「时间」「IP+地点+AM/PM」排成三段式，
 *     用 grid 等分列宽，从根上消除内容溢出。
 * 只覆盖视觉，不动 clock.js 的取数与每秒刷新逻辑。
 * ====================================================== */

/* 让卡片本体与外层 #aside-content .card-widget 的统一皮肤保持一致 */
#aside-content .card-clock {
  padding: 18px 20px !important;
  border-radius: var(--r-card) !important;
  background: var(--card-bg) !important;
  overflow: hidden;
}

/* 上游内层凹槽面板：去掉描边/阴影/固定高度，仅留一点点内衬留白 */
#aside-content .card-clock .card-glass,
#aside-content .card-clock .card-background {
  height: auto !important;
  margin: 0 !important;
  padding: 0 !important;
  border: 0 !important;
  border-radius: 0 !important;
  background: transparent !important;
  box-shadow: none !important;
  overflow: visible !important;
}
#aside-content .card-clock .card-content {
  padding: 0 !important;
  background: transparent !important;
}

/* 容器：清掉上游 20px 内边距（已由卡片本体统一控制），并限定字体 */
#aside-content .card-clock #hexo_electric_clock {
  padding: 0 !important;
  font-family: var(--font-ui) !important;
}

/* 加载动画：居中、限宽，避免 100% 宽把卡片撑变形 */
#aside-content .card-clock #card-clock-loading {
  display: block;
  width: auto !important;
  max-width: 100%;
  height: 96px !important;
  margin: 12px auto;
  border-radius: var(--r-card);
}

/* 三行布局：日期行 / 时间行 / 地点行，行间留白，不再用 nowrap 挤压 */
#aside-content .card-clock .clock-row {
  display: flex !important;
  flex-wrap: nowrap !important;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  margin: 0 !important;
  padding: 0 !important;
  font-family: var(--font-ui) !important;
  font-weight: 400 !important;
  line-height: 1.5 !important;
  color: var(--font-color) !important;
}
#aside-content .card-clock .clock-row + .clock-row {
  margin-top: 6px !important;
}

/* 上/下信息行的小字：次级色，避免和大号时间抢视线 */
#aside-content .card-clock .clock-row:first-child,
#aside-content .card-clock .clock-row:last-child {
  font-size: 12px !important;
  color: var(--second-font-color, #67748c) !important;
  letter-spacing: .2px;
}

/* 三段式列宽：左右两列各占一份，中间一列略宽以便容纳天气文案 */
#aside-content .card-clock .card-clock-clockdate,
#aside-content .card-clock .card-clock-ip {
  flex: 1 1 0 !important;
  min-width: 0;
  text-align: left !important;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
#aside-content .card-clock .card-clock-weather,
#aside-content .card-clock .card-clock-location {
  flex: 1 1 0 !important;
  min-width: 0;
  text-align: center !important;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
#aside-content .card-clock .card-clock-humidity,
#aside-content .card-clock .card-clock-dackorlight {
  flex: 0 0 auto !important;
  min-width: 0;
  text-align: right !important;
  white-space: nowrap;
}

/* 时间行：全站最高优先级，独占一行居中；等宽数字避免每秒跳动 */
#aside-content .card-clock .card-clock-time {
  flex: 1 1 auto !important;
  text-align: center !important;
  font-family: var(--font-ui) !important;
  font-size: 34px !important;
  font-weight: 300 !important;
  line-height: 1.15 !important;
  letter-spacing: 2px;
  font-variant-numeric: tabular-nums;
  font-feature-settings: 'tnum' 1;
  color: var(--font-color) !important;
  margin: 4px 0 !important;
  /* 上游 UnidreamLED 已失效，此处禁用其字体回退链，防止字形来回跳 */
  font-synthesis: none;
}

/* 天气图标与文字：图标固定宽度，保证文案基线对齐不抖 */
#aside-content .card-clock .card-clock-weather i {
  margin-right: 3px;
  color: #7e96b8;
}

/* 湿度：上游是 emoji 💧，彩色字形与低饱和界面冲突，降饱和处理 */
#aside-content .card-clock .card-clock-humidity {
  filter: grayscale(.15);
  opacity: .9;
}

/* 地点行左侧的 IP：属于诊断信息，弱化到最低一档 */
#aside-content .card-clock .card-clock-ip {
  font-size: 11px !important;
  opacity: .55;
  letter-spacing: 0;
}

/* 窄屏（手机端悬浮卡）进一步收紧字号，防止数字顶破卡片 */
@media (max-width: 768px) {
  #aside-content .card-clock .card-clock-time {
    font-size: 30px !important;
    letter-spacing: 1px;
  }
}

/* 深色模式：上游写死的 #212121 已去除，这里只把次级文字提亮一档 */
[data-theme="dark"] #aside-content .card-clock .clock-row:first-child,
[data-theme="dark"] #aside-content .card-clock .clock-row:last-child {
  color: rgba(255, 255, 255, .55) !important;
}

/* ======================================================
 * 自定义独立页（/music/ 等）的吸顶导航基线
 * 这些页面不走 Butterfly 布局，需自行避开刘海圆角与底部横条
 * ====================================================== */
.topbar-mp {
  position: sticky;
  top: 0;
  z-index: 50;
  display: flex;
  align-items: center;
  gap: 10px;
  height: 54px;
  padding: 0 max(14px, env(safe-area-inset-left, 0px)) 0 max(14px, env(safe-area-inset-right, 0px));
  background: color-mix(in srgb, var(--card-bg, #ffffff) 82%, transparent);
  -webkit-backdrop-filter: saturate(180%) blur(14px);
  backdrop-filter: saturate(180%) blur(14px);
  border-bottom: 1px solid rgba(126, 150, 184, .2);
}
.topback-mp {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  min-height: 40px;
  padding: 0 12px;
  border-radius: 999px;
  color: var(--card-meta, #6b7888);
  text-decoration: none;
  font-size: .86rem;
}
.topback-mp:hover {
  background: rgba(126, 150, 184, .14);
  color: var(--card-meta, #6b7888);
}
.brand-mp {
  margin-left: auto;
  color: #7e96b8;
  font-size: .78rem;
  font-weight: 700;
  letter-spacing: .18em;
  text-transform: uppercase;
}
/* 视觉隐藏但保留给读屏 */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}
@media (max-width: 640px) {
  .topbar-mp { height: 50px; }
}