@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;600;700;800&display=swap');

/* ─── 变量 ─── */
:root {
  --c-bg: #1c1726;
  --c-bg2: #231d30;
  --c-bg3: #2a2240;
  --c-purple: #6514ff;
  --c-pink: #bf00ff;
  --c-purple-light: #8a4fff;
  --c-pink-light: #d966ff;
  --c-text: #f0e8ff;
  --c-text-muted: #a990cc;
  --c-text-dim: #7a6499;
  --c-border: #3d2f5a;
  --c-card: #221b34;
  --c-card-hover: #2a2044;
  --nav-w: 260px;
  --radius: 10px;
  --gap: 48px;
  --gap-sm: 24px;
  --transition: 200ms ease;
}

/* ─── 重置 ─── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { font-size: 16px; scroll-behavior: smooth; }
body {
  font-family: 'Inter', system-ui, -apple-system, sans-serif;
  background: var(--c-bg);
  color: var(--c-text);
  line-height: 1.6;
  min-height: 100vh;
  overflow-x: hidden;
}
img { max-width: 100%; height: auto; display: block; }
a { color: var(--c-purple-light); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--c-pink-light); }
ul, ol { list-style: none; }

/* ─── 布局骨架 ─── */
.site-wrap {
  display: flex;
  min-height: 100vh;
}

/* ─── 侧边导航 ─── */
.side-nav {
  width: var(--nav-w);
  background: var(--c-bg2);
  border-right: 1px solid var(--c-border);
  position: fixed;
  top: 0;
  left: 0;
  height: 100vh;
  overflow-y: auto;
  z-index: 100;
  display: flex;
  flex-direction: column;
  padding: 0 0 32px;
  scrollbar-width: thin;
  scrollbar-color: var(--c-border) transparent;
}

.side-nav-brand {
  padding: 28px 20px 24px;
  border-bottom: 1px solid var(--c-border);
  background: linear-gradient(135deg, var(--c-bg3) 0%, var(--c-bg2) 100%);
}

.brand-link {
  display: block;
  font-size: 15px;
  font-weight: 800;
  color: var(--c-text);
  line-height: 1.3;
  letter-spacing: -0.02em;
  background: linear-gradient(90deg, #fff 0%, var(--c-pink-light) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.brand-slogan {
  font-size: 11px;
  color: var(--c-text-muted);
  margin-top: 6px;
  letter-spacing: 0.03em;
}

.side-nav ol {
  padding: 16px 12px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.side-nav ol li a {
  display: block;
  padding: 10px 14px;
  border-radius: 8px;
  font-size: 13px;
  font-weight: 600;
  color: var(--c-text-muted);
  transition: background var(--transition), color var(--transition);
  line-height: 1.4;
}

.side-nav ol li a:hover,
.side-nav ol li a[aria-current="page"] {
  background: linear-gradient(90deg, rgba(101,20,255,0.25) 0%, rgba(191,0,255,0.12) 100%);
  color: var(--c-text);
}

.side-nav ol li a[aria-current="page"] {
  background: linear-gradient(90deg, rgba(101,20,255,0.45) 0%, rgba(191,0,255,0.25) 100%);
  color: #fff;
  border-left: 3px solid var(--c-pink);
  padding-left: 11px;
}

/* ─── 页面主体 ─── */
.page-body {
  margin-left: var(--nav-w);
  flex: 1;
  display: flex;
  flex-direction: column;
  min-width: 0;
}

/* ─── 顶部公告条 ─── */
.top-bar {
  background: linear-gradient(90deg, var(--c-purple) 0%, var(--c-pink) 100%);
  padding: 10px 32px;
  text-align: center;
  position: sticky;
  top: 0;
  z-index: 50;
}

.top-bar-text {
  font-size: 13px;
  font-weight: 600;
  color: #fff;
  letter-spacing: 0.05em;
}

/* ─── main + aside 布局 ─── */
main {
  display: flex;
  gap: var(--gap);
  padding: var(--gap) 32px;
  flex: 1;
  align-items: flex-start;
}

main > article {
  flex: 1;
  min-width: 0;
}

/* ─── aside ─── */
.side-aside {
  width: 260px;
  flex-shrink: 0;
  display: flex;
  flex-direction: column;
  gap: 20px;
  position: sticky;
  top: 60px;
}

.aside-block {
  background: var(--c-card);
  border: 1px solid var(--c-border);
  border-radius: var(--radius);
  padding: 20px;
}

.aside-block h3 {
  font-size: 13px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--c-text-muted);
  margin-bottom: 14px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.aside-block h3 > span {
  color: var(--c-text);
}

.aside-block-highlight {
  background: linear-gradient(135deg, rgba(101,20,255,0.18) 0%, rgba(191,0,255,0.10) 100%);
  border-color: rgba(101,20,255,0.4);
}

.aside-nav-list {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.aside-nav-list li a {
  display: block;
  font-size: 13px;
  color: var(--c-text-muted);
  padding: 5px 0;
  border-bottom: 1px solid rgba(255,255,255,0.04);
  transition: color var(--transition), padding-left var(--transition);
}

.aside-nav-list li a:hover {
  color: var(--c-pink-light);
  padding-left: 6px;
}

.aside-link {
  display: inline-block;
  margin-top: 12px;
  font-size: 12px;
  font-weight: 700;
  color: var(--c-pink-light);
  letter-spacing: 0.04em;
}

.aside-block > p {
  font-size: 13px;
  color: var(--c-text-muted);
  line-height: 1.6;
}

/* ─── 徽章 ─── */
.badge {
  display: inline-flex;
  align-items: center;
  padding: 4px 10px;
  border-radius: 20px;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}
.badge-hot { background: rgba(255, 50, 100, 0.2); color: #ff6680; border: 1px solid rgba(255,50,100,0.3); }
.badge-new { background: rgba(101,20,255,0.2); color: var(--c-purple-light); border: 1px solid rgba(101,20,255,0.3); }
.badge-vip { background: rgba(191,0,255,0.2); color: var(--c-pink-light); border: 1px solid rgba(191,0,255,0.3); }
.badge-channel { background: rgba(101,20,255,0.3); color: #c8a0ff; border: 1px solid rgba(101,20,255,0.5); }
.badge-article { background: rgba(191,0,255,0.2); color: var(--c-pink-light); border: 1px solid rgba(191,0,255,0.3); }
.badge-about { background: rgba(101,20,255,0.2); color: var(--c-purple-light); border: 1px solid rgba(101,20,255,0.3); }
.badge-privacy { background: rgba(100,100,100,0.2); color: #aaa; border: 1px solid rgba(100,100,100,0.3); }

/* ─── 按钮 ─── */
.btn-primary {
  display: inline-flex;
  align-items: center;
  padding: 14px 28px;
  background: linear-gradient(90deg, var(--c-purple) 0%, var(--c-pink) 100%);
  color: #fff;
  font-weight: 700;
  font-size: 15px;
  border-radius: 8px;
  transition: opacity var(--transition), transform var(--transition);
  min-height: 48px;
}
.btn-primary:hover { opacity: 0.85; color: #fff; transform: translateY(-2px); }

.btn-secondary {
  display: inline-flex;
  align-items: center;
  padding: 14px 28px;
  background: rgba(101,20,255,0.2);
  color: var(--c-purple-light);
  font-weight: 700;
  font-size: 15px;
  border-radius: 8px;
  border: 1px solid rgba(101,20,255,0.4);
  transition: background var(--transition), transform var(--transition);
  min-height: 48px;
}
.btn-secondary:hover { background: rgba(101,20,255,0.35); color: #fff; transform: translateY(-2px); }

.btn-ghost {
  display: inline-flex;
  align-items: center;
  padding: 14px 28px;
  background: transparent;
  color: var(--c-text-muted);
  font-weight: 600;
  font-size: 15px;
  border-radius: 8px;
  border: 1px solid var(--c-border);
  transition: border-color var(--transition), color var(--transition);
  min-height: 48px;
}
.btn-ghost:hover { border-color: var(--c-pink); color: var(--c-pink-light); }

/* ─── 几何装饰 ─── */
.hero-geo-deco {
  position: absolute;
  inset: 0;
  pointer-events: none;
  overflow: hidden;
  z-index: 0;
}
.geo-circle {
  position: absolute;
  border-radius: 50%;
  opacity: 0.15;
}
.geo-c1 {
  width: 320px;
  height: 320px;
  background: radial-gradient(circle, var(--c-purple) 0%, transparent 70%);
  right: -60px;
  top: -80px;
  animation: pulse-geo 4s ease-in-out infinite;
}
.geo-c2 {
  width: 180px;
  height: 180px;
  background: radial-gradient(circle, var(--c-pink) 0%, transparent 70%);
  right: 100px;
  bottom: -40px;
  animation: pulse-geo 4s ease-in-out infinite 2s;
}
.geo-rect {
  position: absolute;
  opacity: 0.08;
}
.geo-r1 {
  width: 120px;
  height: 120px;
  background: var(--c-pink);
  right: 40px;
  top: 50%;
  transform: rotate(30deg);
  animation: rotate-geo 8s linear infinite;
}

@keyframes pulse-geo {
  0%, 100% { opacity: 0.12; transform: scale(1); }
  50% { opacity: 0.22; transform: scale(1.08); }
}
@keyframes rotate-geo {
  from { transform: rotate(30deg); }
  to { transform: rotate(390deg); }
}

/* ─── Hero 首页 ─── */
.hero-section {
  position: relative;
  min-height: 70vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 64px 48px;
  background: linear-gradient(135deg, var(--c-bg3) 0%, #18102a 100%);
  border-radius: 16px;
  overflow: hidden;
  margin-bottom: var(--gap);
  border: 1px solid var(--c-border);
}

.hero-badges {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  position: relative;
  z-index: 1;
  margin-bottom: 24px;
}

.hero-h1 {
  font-size: clamp(32px, 4vw, 56px);
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -0.03em;
  color: #fff;
  position: relative;
  z-index: 1;
  max-width: 680px;
  margin-bottom: 20px;
}

.hero-sub {
  font-size: 17px;
  color: var(--c-text-muted);
  max-width: 520px;
  line-height: 1.7;
  position: relative;
  z-index: 1;
  margin-bottom: 36px;
}

.hero-actions {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
  position: relative;
  z-index: 1;
}

/* ─── section 标题 ─── */
.content-section,
.channels-section,
.latest-section,
.channel-content-section,
.sub-articles-section,
.article-siblings-section,
.about-content-section,
.about-channels-section,
.privacy-content-section,
.privacy-nav-section {
  margin-bottom: var(--gap);
}

.channels-section h2,
.latest-section h2,
.sub-articles-section h2,
.article-siblings-section h2,
.about-channels-section h2,
.privacy-nav-section h2 {
  font-size: 28px;
  font-weight: 800;
  letter-spacing: -0.02em;
  color: #fff;
  margin-bottom: 28px;
  display: flex;
  align-items: center;
  gap: 12px;
}

.channels-section h2 > span,
.latest-section h2 > span,
.sub-articles-section h2 > span,
.article-siblings-section h2 > span,
.about-channels-section h2 > span,
.privacy-nav-section h2 > span {
  background: linear-gradient(90deg, #fff 0%, var(--c-pink-light) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* ─── 频道卡片 ─── */
.channels-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 20px;
}

.ch-card {
  background: var(--c-card);
  border: 1px solid var(--c-border);
  border-radius: var(--radius);
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  transition: transform var(--transition), border-color var(--transition), box-shadow var(--transition);
  box-shadow: 0 4px 24px rgba(0,0,0,0.3);
}
.ch-card:hover {
  transform: translateY(-4px);
  border-color: var(--c-purple);
  box-shadow: 0 8px 40px rgba(101,20,255,0.25);
}

.ch-card-badge { width: fit-content; }

.ch-card h3 {
  font-size: 18px;
  font-weight: 700;
  line-height: 1.3;
  color: #fff;
}
.ch-card h3 > span { color: inherit; }

.ch-card-desc {
  font-size: 13px;
  color: var(--c-text-muted);
  line-height: 1.6;
  flex: 1;
}

.ch-card-subs {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.ch-sub-link {
  font-size: 11px;
  color: var(--c-text-dim);
  padding: 3px 8px;
  background: rgba(255,255,255,0.05);
  border-radius: 4px;
  transition: background var(--transition), color var(--transition);
}
.ch-sub-link:hover { background: rgba(101,20,255,0.2); color: var(--c-purple-light); }

.ch-card-cta {
  display: inline-flex;
  align-items: center;
  font-size: 13px;
  font-weight: 700;
  color: var(--c-purple-light);
  gap: 4px;
  transition: color var(--transition);
  min-height: 40px;
  padding: 8px 0;
}
.ch-card-cta:hover { color: var(--c-pink-light); }

/* ─── 最新文章 ─── */
.latest-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 20px;
}

.latest-item {
  background: var(--c-card);
  border: 1px solid var(--c-border);
  border-radius: var(--radius);
  padding: 22px;
  transition: transform var(--transition), box-shadow var(--transition);
  box-shadow: 0 4px 16px rgba(0,0,0,0.25);
}
.latest-item:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 32px rgba(191,0,255,0.15);
}

.latest-meta { margin-bottom: 8px; }

.latest-item h3 {
  font-size: 16px;
  font-weight: 700;
  margin-bottom: 8px;
  line-height: 1.4;
}
.latest-item h3 > span { display: block; }
.latest-item h3 a { color: #fff; }
.latest-item h3 a:hover { color: var(--c-pink-light); }

.latest-item p {
  font-size: 13px;
  color: var(--c-text-muted);
  line-height: 1.6;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* ─── 日期 ─── */
.art-date, .art-pubdate, .art-moddate {
  font-size: 12px;
  color: var(--c-text-dim);
  font-weight: 600;
  letter-spacing: 0.03em;
}

/* ─── 正文 prose ─── */
.content-prose,
.channel-prose,
.article-prose,
.about-prose,
.privacy-prose {
  font-size: 16px;
  line-height: 1.8;
  color: var(--c-text);
  max-width: 720px;
}

.content-prose h2, .channel-prose h2, .article-prose h2, .about-prose h2, .privacy-prose h2,
.content-prose h3, .channel-prose h3, .article-prose h3, .about-prose h3, .privacy-prose h3 {
  font-weight: 700;
  color: #fff;
  margin: 32px 0 14px;
  line-height: 1.3;
}
.content-prose h2, .channel-prose h2, .article-prose h2, .about-prose h2, .privacy-prose h2 { font-size: 22px; }
.content-prose h3, .channel-prose h3, .article-prose h3, .about-prose h3, .privacy-prose h3 { font-size: 18px; }

.content-prose p, .channel-prose p, .article-prose p, .about-prose p, .privacy-prose p {
  margin-bottom: 16px;
}

.content-prose a, .channel-prose a, .article-prose a, .about-prose a, .privacy-prose a {
  color: var(--c-purple-light);
  text-decoration: underline;
  text-decoration-color: rgba(101,20,255,0.3);
}
.content-prose a:hover, .channel-prose a:hover, .article-prose a:hover, .about-prose a:hover, .privacy-prose a:hover {
  color: var(--c-pink-light);
}

.content-prose ul, .channel-prose ul, .article-prose ul, .about-prose ul, .privacy-prose ul,
.content-prose ol, .channel-prose ol, .article-prose ol, .about-prose ol, .privacy-prose ol {
  margin: 0 0 16px 20px;
  list-style: disc;
}
.content-prose ol, .channel-prose ol, .article-prose ol, .about-prose ol, .privacy-prose ol { list-style: decimal; }

.content-prose li, .channel-prose li, .article-prose li, .about-prose li, .privacy-prose li {
  margin-bottom: 6px;
}

.content-prose strong, .channel-prose strong, .article-prose strong, .about-prose strong, .privacy-prose strong {
  color: #fff;
  font-weight: 700;
}

.content-prose blockquote, .channel-prose blockquote, .article-prose blockquote {
  border-left: 3px solid var(--c-purple);
  padding: 12px 20px;
  margin: 20px 0;
  background: rgba(101,20,255,0.08);
  border-radius: 0 8px 8px 0;
  color: var(--c-text-muted);
  font-style: italic;
}

/* ─── 频道 Hero ─── */
.channel-hero {
  position: relative;
  padding: 56px 48px;
  background: linear-gradient(135deg, var(--c-bg3) 0%, #18102a 100%);
  border-radius: 16px;
  overflow: hidden;
  margin-bottom: var(--gap);
  border: 1px solid var(--c-border);
}

.channel-hero h1 {
  font-size: clamp(28px, 3.5vw, 44px);
  font-weight: 800;
  letter-spacing: -0.03em;
  color: #fff;
  position: relative;
  z-index: 1;
  margin: 16px 0 14px;
  line-height: 1.2;
}

.channel-eyebrow {
  display: flex;
  align-items: center;
  gap: 10px;
  position: relative;
  z-index: 1;
  flex-wrap: wrap;
}

.channel-hero-inner {
  position: relative;
  z-index: 1;
}

.channel-desc {
  font-size: 16px;
  color: var(--c-text-muted);
  max-width: 560px;
  line-height: 1.7;
  position: relative;
  z-index: 1;
}

/* ─── 面包屑 ─── */
.article-breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
  font-size: 13px;
  color: var(--c-text-dim);
  margin-bottom: 20px;
}
.article-breadcrumb a { color: var(--c-text-muted); }
.article-breadcrumb a:hover { color: var(--c-pink-light); }
.breadcrumb-sep { color: var(--c-text-dim); }
.breadcrumb-link { color: var(--c-text-muted); font-size: 13px; }

/* ─── 文章 header ─── */
.article-header-section {
  margin-bottom: var(--gap-sm);
  padding-bottom: var(--gap-sm);
  border-bottom: 1px solid var(--c-border);
}

.article-meta-row {
  display: flex;
  align-items: center;
  gap: 14px;
  flex-wrap: wrap;
  margin-bottom: 18px;
}

.article-header-section h1 {
  font-size: clamp(26px, 3vw, 40px);
  font-weight: 800;
  letter-spacing: -0.025em;
  color: #fff;
  line-height: 1.25;
  margin-bottom: 14px;
}

.article-lead {
  font-size: 17px;
  color: var(--c-text-muted);
  line-height: 1.7;
  max-width: 640px;
}

/* ─── 同频道文章 ─── */
.siblings-list {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 16px;
}

.sibling-item {
  background: var(--c-card);
  border: 1px solid var(--c-border);
  border-radius: var(--radius);
  padding: 18px;
  transition: transform var(--transition);
}
.sibling-item:hover { transform: translateY(-2px); }

.sibling-item h3 {
  font-size: 15px;
  font-weight: 700;
  margin-bottom: 8px;
}
.sibling-item h3 > span { display: block; }
.sibling-item h3 a { color: #fff; }
.sibling-item h3 a:hover { color: var(--c-pink-light); }

.sibling-item p {
  font-size: 13px;
  color: var(--c-text-muted);
  line-height: 1.6;
}

.sibling-meta {
  margin-bottom: 8px;
}

/* ─── 子页卡片（channel列表） ─── */
.sub-card {
  background: var(--c-card);
  border: 1px solid var(--c-border);
  border-radius: var(--radius);
  padding: 24px;
  margin-bottom: 16px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  transition: border-color var(--transition), box-shadow var(--transition);
  box-shadow: 0 4px 16px rgba(0,0,0,0.2);
}
.sub-card:hover {
  border-color: var(--c-purple);
  box-shadow: 0 6px 28px rgba(101,20,255,0.2);
}

.sub-card-top {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}

.sub-card h3 {
  font-size: 18px;
  font-weight: 700;
  line-height: 1.3;
}
.sub-card h3 > span { display: block; }
.sub-card h3 a { color: #fff; }
.sub-card h3 a:hover { color: var(--c-pink-light); }

.sub-card-desc {
  font-size: 14px;
  color: var(--c-text-muted);
  line-height: 1.65;
}

.sub-card-link {
  display: inline-flex;
  align-items: center;
  font-size: 13px;
  font-weight: 700;
  color: var(--c-purple-light);
  min-height: 40px;
  transition: color var(--transition);
  align-self: flex-start;
}
.sub-card-link:hover { color: var(--c-pink-light); }

.empty-tip {
  color: var(--c-text-dim);
  font-size: 14px;
  padding: 24px;
  text-align: center;
  border: 1px dashed var(--c-border);
  border-radius: var(--radius);
}

/* ─── About ─── */
.about-hero-section {
  position: relative;
  padding: 56px 48px;
  background: linear-gradient(135deg, var(--c-bg3) 0%, #18102a 100%);
  border-radius: 16px;
  overflow: hidden;
  margin-bottom: var(--gap);
  border: 1px solid var(--c-border);
}

.about-eyebrow, .privacy-eyebrow {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 20px;
}

.about-hero-section h1 {
  font-size: clamp(28px, 3.5vw, 44px);
  font-weight: 800;
  color: #fff;
  letter-spacing: -0.03em;
  position: relative;
  z-index: 1;
  margin-bottom: 16px;
  line-height: 1.2;
}

.about-lead {
  font-size: 16px;
  color: var(--c-text-muted);
  max-width: 540px;
  line-height: 1.7;
  position: relative;
  z-index: 1;
}

.about-channels-list {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 16px;
}

.about-ch-item {
  background: var(--c-card);
  border: 1px solid var(--c-border);
  border-radius: var(--radius);
  padding: 20px;
  transition: transform var(--transition), border-color var(--transition);
}
.about-ch-item:hover {
  transform: translateY(-3px);
  border-color: var(--c-purple);
}

.about-ch-item h3 {
  font-size: 16px;
  font-weight: 700;
  margin-bottom: 8px;
}
.about-ch-item h3 > span { display: block; }
.about-ch-item h3 a { color: #fff; }
.about-ch-item h3 a:hover { color: var(--c-pink-light); }
.about-ch-item p { font-size: 13px; color: var(--c-text-muted); line-height: 1.6; }

/* ─── Privacy ─── */
.privacy-header-section {
  padding-bottom: var(--gap-sm);
  border-bottom: 1px solid var(--c-border);
  margin-bottom: var(--gap-sm);
}

.privacy-header-section h1 {
  font-size: clamp(26px, 3vw, 40px);
  font-weight: 800;
  color: #fff;
  letter-spacing: -0.025em;
  margin-bottom: 14px;
  line-height: 1.25;
}

.privacy-lead {
  font-size: 16px;
  color: var(--c-text-muted);
  line-height: 1.7;
  max-width: 600px;
}

.privacy-nav-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 16px;
}

.privacy-nav-item {
  background: var(--c-card);
  border: 1px solid var(--c-border);
  border-radius: var(--radius);
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  transition: transform var(--transition), border-color var(--transition);
  min-height: 80px;
}
.privacy-nav-item:hover {
  transform: translateY(-3px);
  border-color: var(--c-purple);
}

.pn-label {
  font-size: 16px;
  font-weight: 700;
  color: #fff;
}

.pn-desc {
  font-size: 13px;
  color: var(--c-text-muted);
}

/* ─── 页脚 ─── */
footer {
  background: var(--c-bg2);
  border-top: 1px solid var(--c-border);
  margin-top: auto;
}

.footer-cta-section {
  background: linear-gradient(135deg, rgba(101,20,255,0.2) 0%, rgba(191,0,255,0.15) 100%);
  border-bottom: 1px solid var(--c-border);
  padding: 56px 32px;
  text-align: center;
}

.footer-cta-inner {
  max-width: 600px;
  margin: 0 auto;
}

.footer-cta-label {
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.12em;
  color: var(--c-pink-light);
  text-transform: uppercase;
  margin-bottom: 14px;
}

.footer-cta-section h2 {
  font-size: clamp(22px, 2.5vw, 34px);
  font-weight: 800;
  color: #fff;
  margin-bottom: 28px;
  letter-spacing: -0.02em;
  line-height: 1.25;
}

.footer-cta-section h2 > span {
  background: linear-gradient(90deg, #fff 0%, var(--c-pink-light) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.footer-cta-btns {
  display: flex;
  gap: 14px;
  justify-content: center;
  flex-wrap: wrap;
}

.footer-links-section {
  display: flex;
  gap: 48px;
  padding: 48px 32px;
  border-bottom: 1px solid var(--c-border);
  justify-content: space-around;
}

.footer-col h4 {
  font-size: 13px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--c-text-muted);
  margin-bottom: 16px;
}

.footer-col ul {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.footer-col ul li a {
  font-size: 14px;
  color: var(--c-text-dim);
  transition: color var(--transition);
  display: block;
  padding: 2px 0;
  min-height: 28px;
}
.footer-col ul li a:hover { color: var(--c-pink-light); }

.footer-bottom-section {
  padding: 24px 32px;
  text-align: center;
}

.footer-copy {
  font-size: 13px;
  color: var(--c-text-dim);
  margin-bottom: 6px;
}

.footer-note {
  font-size: 12px;
  color: #4a3d66;
}

/* ─── 滚动揭示动效 ─── */
@media (prefers-reduced-motion: no-preference) {
  .ch-card,
  .latest-item,
  .sub-card,
  .sibling-item,
  .about-ch-item {
    opacity: 0;
    transform: translateY(20px);
    animation: reveal 0.4s ease forwards;
  }

  .ch-card:nth-child(1), .latest-item:nth-child(1), .sub-card:nth-child(1) { animation-delay: 0.05s; }
  .ch-card:nth-child(2), .latest-item:nth-child(2), .sub-card:nth-child(2) { animation-delay: 0.10s; }
  .ch-card:nth-child(3), .latest-item:nth-child(3), .sub-card:nth-child(3) { animation-delay: 0.15s; }
  .ch-card:nth-child(4), .latest-item:nth-child(4), .sub-card:nth-child(4) { animation-delay: 0.20s; }
  .ch-card:nth-child(5), .latest-item:nth-child(5), .sub-card:nth-child(5) { animation-delay: 0.25s; }
  .ch-card:nth-child(6), .latest-item:nth-child(6), .sub-card:nth-child(6) { animation-delay: 0.30s; }
}

@keyframes reveal {
  to { opacity: 1; transform: translateY(0); }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
}

/* ─── 响应式 ─── */
@media (max-width: 1100px) {
  :root { --nav-w: 220px; }
  .side-aside { width: 220px; }
  main { gap: 32px; }
}

@media (max-width: 900px) {
  .side-nav {
    position: relative;
    width: 100%;
    height: auto;
    flex-direction: row;
    flex-wrap: wrap;
    border-right: none;
    border-bottom: 1px solid var(--c-border);
    overflow: visible;
  }

  .side-nav-brand {
    flex: 1 1 100%;
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 16px 20px;
    border-bottom: 1px solid var(--c-border);
  }

  .brand-slogan { margin-top: 0; }

  .side-nav ol {
    flex-direction: row;
    flex-wrap: wrap;
    padding: 12px 16px;
    gap: 4px;
    flex: 1 1 100%;
  }

  .side-nav ol li a {
    padding: 8px 12px;
    min-height: 40px;
    display: flex;
    align-items: center;
  }

  .page-body { margin-left: 0; }

  .site-wrap { flex-direction: column; }

  main {
    flex-direction: column;
    padding: 32px 20px;
    gap: 32px;
  }

  .side-aside {
    width: 100%;
    position: static;
    flex-direction: row;
    flex-wrap: wrap;
  }

  .aside-block { flex: 1 1 200px; }

  .hero-section { padding: 48px 28px; min-height: 60vh; }
  .channel-hero { padding: 40px 28px; }
  .about-hero-section { padding: 40px 28px; }
  .footer-links-section { gap: 32px; flex-wrap: wrap; }
}

@media (max-width: 600px) {
  main { padding: 24px 16px; }
  .top-bar { padding: 8px 16px; }
  .hero-section { padding: 36px 20px; min-height: auto; }
  .hero-h1 { font-size: 28px; }
  .hero-actions { flex-direction: column; }
  .btn-primary, .btn-secondary, .btn-ghost { width: 100%; justify-content: center; }
  .channels-grid { grid-template-columns: 1fr; }
  .latest-grid { grid-template-columns: 1fr; }
  .siblings-list { grid-template-columns: 1fr; }
  .about-channels-list { grid-template-columns: 1fr; }
  .privacy-nav-grid { grid-template-columns: 1fr; }
  .footer-links-section { flex-direction: column; gap: 24px; padding: 32px 20px; }
  .footer-cta-section { padding: 40px 20px; }
  .footer-cta-btns { flex-direction: column; }
  .channel-hero { padding: 32px 20px; }
  .about-hero-section { padding: 32px 20px; }
  .aside-block { flex: 1 1 100%; }
}