:root {
  --bg: #ffffff; --bg-card: #f7f8fa; --bg-elevated: #eef0f3; --ink: #1b2430; --ink-soft: #5b6472;
  --border: #e8eaed; --accent: #2b6e71; --accent-soft: #e3f0f0; --card-shadow: rgba(27,36,48,0.06);
  --glass-bg: rgba(255,255,255,0.72);
}
[data-theme="dark"] {
  --bg: #0f1115; --bg-card: #171a21; --bg-elevated: #1d212a; --ink: #e8eaef; --ink-soft: #8b93a3;
  --border: #262b35; --accent: #4fb3b6; --accent-soft: #1a2c2d; --card-shadow: rgba(0,0,0,0.35);
  --glass-bg: rgba(15,17,21,0.68);
}
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--ink); font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.7; transition: background .2s, color .2s; padding-top: 76px; }
a { color: var(--ink); text-decoration: none; }
a:hover { color: var(--accent); }
img, video { max-width: 100%; width: auto; height: auto; display: block; border-radius: 8px; }
.content { overflow-wrap: break-word; word-break: break-word; }
.content img, .content video { margin: 10px 0; }

/* 视频预览遮罩——播放到配置的秒数会被JS暂停+display切成flex展示这层遮罩，
   引导访客去频道看完整版。遮罩本身默认不占位置(position:absolute覆盖在
   video上面)，不影响没触发限制时的正常播放体验。 */
.video-preview-wrap { position: relative; }
.video-preview-wrap video { border-radius: 8px; }
.video-preview-overlay { display: none; position: absolute; inset: 0; border-radius: 8px;
  background: rgba(0,0,0,.72); backdrop-filter: blur(3px); flex-direction: column;
  align-items: center; justify-content: center; gap: 14px; text-align: center; padding: 20px; }
.video-preview-overlay.show { display: flex; }
.video-preview-overlay p { color: #fff; font-size: 15px; font-weight: 600; margin: 0; }
.video-preview-btn { display: inline-block; background: var(--accent); color: #fff !important;
  padding: 10px 22px; border-radius: 999px; font-weight: 700; font-size: 14px;
  text-decoration: none !important; transition: transform .15s ease; }
.video-preview-btn:hover { transform: scale(1.04); }

/* 气泡磨砂导航 —— 悬浮的圆角胶囊条,不是贴边的通栏 */
.site-header-wrap { position: fixed; top: 16px; left: 0; right: 0; z-index: 60; display: flex; justify-content: center; padding: 0 16px; }
.site-header { display: flex; align-items: center; gap: 16px; max-width: 960px; width: 100%;
  padding: 12px 22px; background: var(--glass-bg); backdrop-filter: blur(18px) saturate(1.4); -webkit-backdrop-filter: blur(18px) saturate(1.4);
  border: 1px solid var(--border); border-radius: 999px; box-shadow: 0 8px 32px var(--card-shadow), 0 1px 2px var(--card-shadow); }
.site-header .brand { display: flex; align-items: center; gap: 10px; flex: 1; min-width: 0; }
.site-header.has-wide-logo .brand { flex: 0 1 auto; }
.site-header.has-wide-logo .actions { flex: 0 0 auto; margin-left: auto; }
.site-header .brand img { height: 38px; width: auto; max-width: 220px; border-radius: 8px; object-fit: contain; display: block; }
.site-header .brand img.brand-icon-square { height: 38px; width: 38px; border-radius: 50%; object-fit: cover; }
.site-header .site-name { flex: 2; text-align: center; font-weight: 800; font-size: 19px; white-space: nowrap;
  overflow: hidden; text-overflow: ellipsis; letter-spacing: .3px; }
.site-header .actions { display: flex; align-items: center; gap: 12px; flex: 1; justify-content: flex-end; }
.site-header .icon-btn { background: none; border: none; cursor: pointer; font-size: 18px; color: var(--ink); padding: 4px;
  transition: transform .15s ease; }
.site-header .icon-btn:hover { transform: scale(1.12); }
.site-header .bell-btn { font-size: 21px; background: none; border: none; cursor: pointer; position: relative;
  animation: tgcfBellSwing 3.5s ease-in-out infinite; transition: transform .15s ease; }
.site-header .bell-btn:hover { transform: scale(1.15); }
@keyframes tgcfBellSwing { 0%, 92%, 100% { transform: rotate(0); } 94% { transform: rotate(-14deg); } 96% { transform: rotate(11deg); } 98% { transform: rotate(-6deg); } }
.hamburger { display: none; background: var(--bg-card); border: 1px solid var(--border); border-radius: 10px;
  font-size: 17px; cursor: pointer; color: var(--ink); padding: 6px 10px; }

/* 三栏布局 */
.layout { display: grid; grid-template-columns: 60px minmax(0,1fr) 260px; gap: 20px; max-width: 1240px;
  margin: 24px auto; padding: 0 20px; align-items: start; }
.layout.layout-no-tags { grid-template-columns: minmax(0,1fr) 260px; }
.sidebar-right { min-width: 0; position: sticky; top: 100px; }
.card { background: var(--bg-card); border: 1px solid var(--border); border-radius: 12px;
  padding: 14px 16px; margin-bottom: 16px; box-shadow: 0 1px 2px var(--card-shadow); }
.card h3 { font-size: 13px; margin: 0 0 10px; color: var(--ink-soft); font-weight: 600; }
.card ul { list-style: none; padding: 0; margin: 0; }
.card li { padding: 5px 0; font-size: 14px; }
.ad-item { display: block; font-size: 13px; color: var(--ink-soft); padding: 7px 0; border-top: 1px solid var(--border); }
.ad-item:first-child { border-top: none; padding-top: 0; }
.ad-item:hover { color: var(--accent); }

/* 文章顶部的广告胶囊——发布时间下方，跟正文/普通链接明显区分开。配色方案固定几种，
   每种都专门给浅色/深色两套模式各自调过对比度，不会出现"切主题后看不清"的问题；
   角标贴在胶囊最左侧，用比正文更小的字号+半透明底色，一眼能看出"这是广告"。 */
.ad-slot-top { display: flex; flex-wrap: wrap; gap: 8px; margin: 12px 0; }
.ad-pill { display: inline-flex; align-items: center; gap: 6px; padding: 7px 14px 7px 8px;
  border-radius: 999px; font-size: 13.5px; font-weight: 600; text-decoration: none !important;
  transition: transform .15s ease, box-shadow .15s ease; }
.ad-pill:hover { transform: translateY(-1px); box-shadow: 0 3px 10px var(--card-shadow); }
.ad-badge { font-size: 10.5px; font-weight: 700; padding: 2px 7px; border-radius: 999px;
  background: rgba(0,0,0,.14); letter-spacing: .3px; }
[data-theme="dark"] .ad-badge { background: rgba(255,255,255,.18); }
.ad-pill-icon { font-size: 14px; }

.ad-pill.scheme-default { background: var(--accent-soft); color: var(--accent) !important; }
.ad-pill.scheme-red { background: #fee2e2; color: #991b1b !important; }
[data-theme="dark"] .ad-pill.scheme-red { background: #4c1414; color: #fca5a5 !important; }
.ad-pill.scheme-orange { background: #ffedd5; color: #9a3412 !important; }
[data-theme="dark"] .ad-pill.scheme-orange { background: #4a2410; color: #fdba74 !important; }
.ad-pill.scheme-green { background: #dcfce7; color: #166534 !important; }
[data-theme="dark"] .ad-pill.scheme-green { background: #0f2e1a; color: #86efac !important; }
.ad-pill.scheme-blue { background: #dbeafe; color: #1e40af !important; }
[data-theme="dark"] .ad-pill.scheme-blue { background: #122a4a; color: #93c5fd !important; }
.ad-pill.scheme-purple { background: #f3e8ff; color: #6b21a8 !important; }
[data-theme="dark"] .ad-pill.scheme-purple { background: #2e1244; color: #d8b4fe !important; }

/* 文章底部广告位——跟顶部用同一套flex-wrap容器，视觉上稍微跟正文隔开一点 */
.ad-slot-bottom { display: flex; flex-wrap: wrap; gap: 8px; margin: 20px 0 4px;
  padding-top: 16px; border-top: 1px dashed var(--border); }

/* card形式：图文卡片，适合放侧边栏/列表插播这种相对紧凑的位置 */
.ad-card { display: flex; flex-direction: column; border-radius: 12px; overflow: hidden;
  text-decoration: none !important; transition: transform .15s ease, box-shadow .15s ease;
  border: 1px solid var(--border); background: var(--bg-card); }
.ad-card:hover { transform: translateY(-2px); box-shadow: 0 4px 14px var(--card-shadow); }
.ad-card-img { aspect-ratio: 16/9; overflow: hidden; }
.ad-card-img img { width: 100%; height: 100%; object-fit: cover; }
.ad-card-body { padding: 10px 12px; display: flex; flex-direction: column; gap: 6px; }
.ad-card-text { font-size: 13.5px; font-weight: 600; color: var(--ink) !important; }
.ad-card-body .ad-badge { align-self: flex-start; }

/* banner形式：横幅通栏，适合放文章顶部/底部这种宽度比较大的位置 */
.ad-banner { display: flex; align-items: center; gap: 12px; width: 100%; border-radius: 12px;
  overflow: hidden; text-decoration: none !important; padding: 12px 16px;
  transition: transform .15s ease, box-shadow .15s ease; }
.ad-banner:hover { transform: translateY(-1px); box-shadow: 0 4px 14px var(--card-shadow); }
.ad-banner img { width: 64px; height: 64px; border-radius: 8px; object-fit: cover; flex-shrink: 0; }
.ad-banner-text { font-size: 14px; font-weight: 600; display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }

/* card/banner复用pill同一套配色方案(默认/红/橙/绿/蓝/紫)，颜色值保持一致，
   只是应用到不同的结构选择器上，不去改动上面ad-pill.scheme-*那批已经在
   正常工作的规则，避免引入视觉回归 */
.ad-card.scheme-default, .ad-banner.scheme-default { background: var(--accent-soft); }
.ad-card.scheme-red, .ad-banner.scheme-red { background: #fee2e2; }
[data-theme="dark"] .ad-card.scheme-red, [data-theme="dark"] .ad-banner.scheme-red { background: #4c1414; }
.ad-card.scheme-orange, .ad-banner.scheme-orange { background: #ffedd5; }
[data-theme="dark"] .ad-card.scheme-orange, [data-theme="dark"] .ad-banner.scheme-orange { background: #4a2410; }
.ad-card.scheme-green, .ad-banner.scheme-green { background: #dcfce7; }
[data-theme="dark"] .ad-card.scheme-green, [data-theme="dark"] .ad-banner.scheme-green { background: #0f2e1a; }
.ad-card.scheme-blue, .ad-banner.scheme-blue { background: #dbeafe; }
[data-theme="dark"] .ad-card.scheme-blue, [data-theme="dark"] .ad-banner.scheme-blue { background: #122a4a; }
.ad-card.scheme-purple, .ad-banner.scheme-purple { background: #f3e8ff; }
[data-theme="dark"] .ad-card.scheme-purple, [data-theme="dark"] .ad-banner.scheme-purple { background: #2e1244; }
/* card形式的文字颜色固定用--ink(卡片本身是白底/暗底容器，不需要跟着配色方案变
   文字颜色，配色方案在这里只体现为背景色的区分，可读性更好) */

/* 首页文章列表插播的广告——视觉上要跟真实的文章卡片明显区分开，用虚线边框+
   半透明背景，一眼能看出"这不是一篇文章" */
.ad-list-inline-item { border: 1px dashed var(--border); background: var(--bg-elevated);
  display: flex; align-items: center; padding: 10px; }
.ad-list-inline-item .ad-pill, .ad-list-inline-item .ad-card, .ad-list-inline-item .ad-banner { width: 100%; }

/* 左侧漂浮竖排标签栏 —— 斜体单竖列,悬浮不跟主内容抢空间 */
.sidebar-left { position: sticky; top: 110px; display: flex; flex-direction: column; align-items: center; gap: 14px; }
.tag-float { writing-mode: vertical-rl; text-orientation: mixed; font-style: italic; font-size: 13px;
  color: var(--ink-soft); padding: 10px 4px; letter-spacing: 1px; transition: transform .2s, color .2s; }
.tag-float:hover { color: var(--accent); transform: translateX(-3px); }
.tag-float.more { font-style: normal; font-weight: 700; }

.main-content { min-width: 0; }
.page-main { max-width: 760px; margin: 24px auto; padding: 0 20px; }

.post-list { list-style: none; padding: 0; display: flex; flex-direction: column; gap: 14px; }
.post-card { display: flex; align-items: flex-start; gap: 16px; background: var(--bg-card); border: 1px solid var(--border);
  border-radius: 12px; padding: 14px; box-shadow: 0 1px 2px var(--card-shadow); }
.post-card:hover { border-color: var(--accent); }
.post-card .thumb { width: 140px; height: 90px; flex-shrink: 0; border-radius: 8px; overflow: hidden; background: var(--bg-elevated); }
.post-card .thumb.thumb-video-placeholder { display: flex; align-items: center; justify-content: center; font-size: 28px; }
.post-card .thumb.thumb-logo-tiled { background-repeat: repeat; background-size: 32px auto; background-position: center;
  opacity: .55; }  /* logo平铺当占位背景——半透明处理，跟正常展示的真实缩略图/
                       默认缩略图区分开，一眼能看出"这是占位，不是真实配图" */
.post-card .thumb img { width: 100%; height: 100%; object-fit: cover; border-radius: 0; margin: 0; }
.post-card .post-body { min-width: 0; flex: 1; }
.post-card .post-title { font-size: 16px; font-weight: 700; margin: 0 0 6px; }
.post-card .post-desc { font-size: 13px; color: var(--ink-soft); overflow: hidden; text-overflow: ellipsis;
  display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; }
.meta, .tag-count { color: var(--ink-soft); font-size: 12px; }
.post-card .meta { margin-top: 8px; }
.post-tags a { color: var(--accent); font-size: 13px; margin-right: 8px; }
.tag-list-full { list-style: none; padding: 0; columns: 2; }
.tag-list-full li { padding: 6px 0; }
.subscribe-btn { display: inline-block; background: var(--accent); color: #fff !important; padding: 7px 16px;
  border-radius: 8px; font-weight: 600; font-size: 14px; white-space: nowrap; }
.subscribe-btn:hover { color: #fff !important; opacity: .9; }

.post-footer-links { margin-top: 20px; padding-top: 16px; border-top: 1px dashed var(--border);
  display: flex; flex-wrap: wrap; gap: 10px; }
.post-footer-links .footer-btn { display: inline-flex; align-items: center; gap: 6px;
  background: var(--accent-soft); color: var(--accent) !important; padding: 8px 18px;
  border-radius: 999px; font-weight: 600; font-size: 13.5px; text-decoration: none;
  transition: transform .15s ease, box-shadow .15s ease; }
.post-footer-links .footer-btn:hover { transform: translateY(-1px); box-shadow: 0 4px 12px var(--card-shadow); }
.post-footer-links br { display: none; }  /* 页脚文字换行符转成的<br>在这个按钮化的上下文
                                              里不需要了(按钮本身靠flex-wrap自动换行排布) */

.post-prev-next { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; margin-top: 24px;
  padding-top: 16px; border-top: 1px solid var(--border); }
.post-prev-next .prev-next-link { display: flex; flex-direction: column; gap: 4px; padding: 12px 14px;
  border-radius: 10px; background: var(--bg-elevated); text-decoration: none !important;
  transition: background .15s ease; min-width: 0; }
.post-prev-next .prev-next-link:hover { background: var(--accent-soft); }
.post-prev-next .prev-next-link.next { text-align: right; align-items: flex-end; }
.post-prev-next .prev-next-label { font-size: 12px; color: var(--ink-soft); font-weight: 600; }
.post-prev-next .prev-next-title { font-size: 14px; color: var(--ink) !important; font-weight: 600;
  overflow: hidden; text-overflow: ellipsis; white-space: nowrap; max-width: 100%; }
@media (max-width: 860px) {
  .post-prev-next { grid-template-columns: 1fr; }
  .post-prev-next .prev-next-link.next { text-align: left; align-items: flex-start; }
}

.pagination { display: flex; flex-wrap: wrap; justify-content: center; align-items: center; gap: 8px; margin: 28px 0; }
.pagination a, .pagination span { display: inline-flex; align-items: center; justify-content: center;
  min-width: 34px; height: 34px; border-radius: 8px; background: var(--bg-card); border: 1px solid var(--border);
  color: var(--ink-soft); font-size: 14px; padding: 0 10px; }
.pagination .current { background: var(--accent); color: #fff; border-color: var(--accent); }
.pagination .ellipsis { background: none; border: none; min-width: auto; padding: 0 2px; color: var(--ink-soft); }
.pagination a:hover { border-color: var(--accent); color: var(--accent); }

/* 贴底footer */
.site-footer { background: var(--bg-card); border-top: 1px solid var(--border); margin-top: 40px;
  padding: 24px 20px; font-size: 13px; color: var(--ink-soft); }
.site-footer .footer-inner { max-width: 1240px; margin: 0 auto; display: flex; flex-wrap: wrap; gap: 24px; justify-content: space-between; }
.site-footer .footer-links a { color: var(--ink-soft); margin-right: 14px; }
.site-footer .footer-links a:hover { color: var(--accent); }
.site-footer .footer-desc { max-width: 480px; }

.search-box { display: none; position: fixed; top: 76px; left: 0; right: 0; z-index: 59; background: var(--bg);
  border-bottom: 1px solid var(--border); padding: 14px 20px; box-shadow: 0 4px 12px var(--card-shadow); }
.search-box.open { display: block; }
.search-box input { width: 100%; max-width: 600px; margin: 0 auto; display: block; padding: 9px 14px;
  border: 1px solid var(--border); border-radius: 8px; background: var(--bg-card); color: var(--ink); font-size: 15px; }
#search-results { max-width: 600px; margin: 8px auto 0; }
#search-results a { display: block; padding: 7px 0; }

/* 右下角悬浮功能按钮 —— 主题切换常驻,返回顶部只在滑动过半才出现 */
.float-actions { position: fixed; right: 20px; bottom: 24px; z-index: 55; display: flex; flex-direction: column; gap: 10px; }
.float-btn { width: 44px; height: 44px; border-radius: 50%; background: var(--bg-card); border: 1px solid var(--border);
  box-shadow: 0 4px 14px var(--card-shadow); display: flex; align-items: center; justify-content: center;
  font-size: 18px; cursor: pointer; color: var(--ink); }
.float-btn:hover { border-color: var(--accent); }
#back-to-top { opacity: 0; pointer-events: none; transform: translateY(8px); transition: opacity .2s, transform .2s; }
#back-to-top.show { opacity: 1; pointer-events: auto; transform: translateY(0); }

/* 移动端导航面板 —— 不左右滑入,用旋转+显隐 */
.mobile-drawer { display: none; position: fixed; inset: 0; z-index: 80; background: rgba(0,0,0,.5);
  align-items: center; justify-content: center; padding: 20px; }
.mobile-drawer.open { display: flex; }
.mobile-drawer .drawer-panel { width: 100%; max-width: 360px; max-height: 80vh; overflow-y: auto;
  background: var(--bg); border-radius: 16px; padding: 20px; transform: rotateX(-90deg); opacity: 0;
  transform-origin: top center; transition: transform .25s ease, opacity .25s ease; }
.mobile-drawer.open .drawer-panel { transform: rotateX(0); opacity: 1; }
.mobile-drawer .drawer-close { background: none; border: none; font-size: 20px; color: var(--ink); float: right; cursor: pointer; }

@media (max-width: 860px) {
  body { padding-top: 68px; }
  .layout, .layout.layout-no-tags { grid-template-columns: 1fr; }
  .sidebar-left, .sidebar-right { display: none; }
  .site-header .site-name { display: none; }
  .site-header-wrap { top: 8px; }
  .hamburger { display: inline-block; order: 3; }
  .site-header .actions { order: 3; }
  .post-card .thumb { width: 92px; height: 68px; }
  .post-card .post-title { font-size: 14px; }
}
@media (min-width: 861px) { .mobile-drawer { display: none !important; } }

.onboard-modal { position: fixed; inset: 0; background: rgba(0,0,0,0.55); z-index: 100;
  display: flex; align-items: center; justify-content: center; padding: 16px; perspective: 1000px; }
.onboard-modal .box { background: var(--bg); border-radius: 14px; padding: 24px; max-width: 420px; width: 100%;
  max-height: 80vh; overflow-y: auto; animation: tgcfFlipIn .35s ease; }
@keyframes tgcfFlipIn { from { transform: rotateY(-90deg); opacity: 0; } to { transform: rotateY(0); opacity: 1; } }
.onboard-modal h2 { margin-top: 0; }

/* 广告弹窗配图——固定16:9宽高比，贴着卡片边缘展示(负margin抵消.box自身的padding，
   实现"无边框、图片直接顶满卡片顶部"这种沉浸式的高级感，不是"卡片内嵌一张小图"
   那种拘谨的样式)。宽高比容器本身就是响应式的(浏览器原生支持aspect-ratio，
   宽度跟着.box的max-width走)，PC和移动端不需要写两套规则，图片不管原始尺寸
   多大/多小/是不是GIF，都会被裁剪填满这个固定区域，不会变形、不会看起来
   随意，视觉上始终统一。 */
.onboard-page .ad-image-wrap { position: relative; aspect-ratio: 16 / 9; border-radius: 14px 14px 0 0;
  overflow: hidden; margin: -24px -24px 16px; }
.onboard-page .ad-image-wrap img { width: 100%; height: 100%; object-fit: cover; display: block; }
.onboard-page .ad-card-link { display: block; text-decoration: none; color: inherit; }
.onboard-page .ad-card-text { font-size: 14px; color: var(--ink); line-height: 1.6; }