@import url('https://fonts.googleapis.com/css2?family=Cormorant:wght@400;500;600;700&family=Montserrat:wght@300;400;500;600;700&display=swap');

/* ── 自定义属性 ── */
:root {
  --c-crimson: #261717;
  --c-red: #ff0000;
  --c-violet: #8b00ff;
  --c-red-dim: rgba(255,0,0,0.7);
  --c-violet-dim: rgba(139,0,255,0.6);
  --c-white: #ffffff;
  --c-white-10: rgba(255,255,255,0.10);
  --c-white-15: rgba(255,255,255,0.15);
  --c-white-20: rgba(255,255,255,0.20);
  --c-white-30: rgba(255,255,255,0.30);
  --c-white-60: rgba(255,255,255,0.60);
  --c-white-80: rgba(255,255,255,0.80);
  --c-glass-bg: rgba(255,255,255,0.12);
  --c-glass-border: rgba(255,255,255,0.20);
  --c-glass-hover: rgba(255,255,255,0.18);
  --c-text: rgba(255,255,255,0.92);
  --c-text-muted: rgba(255,255,255,0.58);
  --c-text-dim: rgba(255,255,255,0.38);
  --radius-card: 18px;
  --radius-pill: 999px;
  --radius-sm: 8px;
  --blur-glass: blur(15px);
  --blur-glass-sm: blur(10px);
  --font-display: 'Cormorant', Georgia, serif;
  --font-ui: 'Montserrat', system-ui, sans-serif;
  --max-content: 1160px;
  --header-h: 64px;
  --transition: 0.22s cubic-bezier(0.4,0,0.2,1);
}

/* ── 基础重置 ── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { font-size: 18px; scroll-behavior: smooth; }
body {
  font-family: var(--font-ui);
  font-size: 1rem;
  line-height: 1.7;
  color: var(--c-text);
  background-color: var(--c-crimson);
  background-image:
    radial-gradient(ellipse 80% 60% at 20% 10%, rgba(139,0,255,0.35) 0%, transparent 60%),
    radial-gradient(ellipse 60% 80% at 80% 80%, rgba(255,0,0,0.25) 0%, transparent 60%),
    radial-gradient(ellipse 100% 100% at 50% 50%, #2e1020 0%, #261717 100%);
  min-height: 100vh;
  overflow-x: hidden;
}
img { display: block; max-width: 100%; height: auto; }
a { color: inherit; text-decoration: none; }
button { cursor: pointer; border: none; background: none; font-family: inherit; }
ul, ol { list-style: none; }
.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;
}

/* ── 通用玻璃拟态 mixin ── */
.glass {
  background: var(--c-glass-bg);
  backdrop-filter: var(--blur-glass);
  -webkit-backdrop-filter: var(--blur-glass);
  border: 1px solid var(--c-glass-border);
  border-radius: var(--radius-card);
}

/* ── 站点包裹 ── */
.site-wrap { min-height: 100vh; display: flex; flex-direction: column; }

/* ══════════════════════════
   导航 Header
══════════════════════════ */
.site-header {
  position: sticky; top: 0; z-index: 100;
  background: rgba(38,23,23,0.75);
  backdrop-filter: var(--blur-glass);
  -webkit-backdrop-filter: var(--blur-glass);
  border-bottom: 1px solid var(--c-glass-border);
}
.header-inner {
  max-width: var(--max-content);
  margin: 0 auto;
  padding: 0 20px;
  height: var(--header-h);
  display: flex;
  align-items: center;
  gap: 16px;
}
.brand-mark {
  flex-shrink: 0;
  display: flex; align-items: center; justify-content: center;
  width: 40px; height: 40px;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--c-red), var(--c-violet));
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 0.9rem;
  letter-spacing: 0.05em;
  transition: transform var(--transition), box-shadow var(--transition);
}
.brand-mark:hover { transform: scale(1.08); box-shadow: 0 0 20px rgba(255,0,0,0.5); }
.brand-icon { color: #fff; font-size: 0.85rem; font-weight: 700; letter-spacing: 0.1em; }

.pill-nav {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
}
.pill-nav__group {
  display: flex;
  align-items: center;
  gap: 6px;
  flex-wrap: nowrap;
  overflow-x: auto;
  scrollbar-width: none;
}
.pill-nav__group::-webkit-scrollbar { display: none; }

.nav-pill {
  display: inline-flex;
  align-items: center;
  height: 36px;
  padding: 0 16px;
  border-radius: var(--radius-pill);
  font-family: var(--font-ui);
  font-size: 0.72rem;
  font-weight: 500;
  letter-spacing: 0.04em;
  white-space: nowrap;
  color: var(--c-white-80);
  background: var(--c-white-10);
  border: 1px solid var(--c-glass-border);
  transition: background var(--transition), color var(--transition), border-color var(--transition);
}
.nav-pill:hover, .nav-pill--active {
  background: rgba(255,0,0,0.18);
  border-color: rgba(255,0,0,0.45);
  color: var(--c-white);
}
.cta-btn {
  flex-shrink: 0;
  display: inline-flex;
  align-items: center;
  height: 40px;
  padding: 0 20px;
  border-radius: var(--radius-pill);
  font-family: var(--font-ui);
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  background: linear-gradient(135deg, var(--c-red), var(--c-violet));
  color: #fff;
  transition: transform var(--transition), box-shadow var(--transition);
  box-shadow: 0 4px 16px rgba(255,0,0,0.3);
}
.cta-btn:hover { transform: translateY(-1px); box-shadow: 0 8px 24px rgba(255,0,0,0.45); }

.mobile-menu-btn {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  width: 44px; height: 44px;
  border-radius: var(--radius-sm);
  background: var(--c-white-10);
  border: 1px solid var(--c-glass-border);
  flex-shrink: 0;
}
.mobile-menu-btn span {
  display: block; width: 20px; height: 2px;
  background: var(--c-white-80);
  border-radius: 2px;
  transition: transform var(--transition), opacity var(--transition);
}
.mobile-menu-btn[aria-expanded="true"] span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.mobile-menu-btn[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.mobile-menu-btn[aria-expanded="true"] span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

.mobile-nav {
  display: none;
  flex-direction: column;
  padding: 12px 20px 16px;
  border-top: 1px solid var(--c-glass-border);
  background: rgba(38,23,23,0.92);
}
.mobile-nav.is-open { display: flex; }
.mobile-nav__link {
  display: flex;
  align-items: center;
  min-height: 44px;
  padding: 8px 0;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--c-white-80);
  border-bottom: 1px solid var(--c-white-10);
}
.mobile-nav__link:last-child { border-bottom: none; }
.mobile-nav__link:hover { color: var(--c-red); }

/* ══════════════════════════
   面包屑
══════════════════════════ */
.breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.75rem;
  font-family: var(--font-ui);
  color: var(--c-text-muted);
  margin-bottom: 20px;
  flex-wrap: wrap;
}
.breadcrumb a { color: var(--c-white-60); transition: color var(--transition); }
.breadcrumb a:hover { color: var(--c-red); }
.breadcrumb span[aria-hidden] { color: var(--c-text-dim); }
.breadcrumb [aria-current] { color: var(--c-text-muted); }

/* ══════════════════════════
   Hero — 首页
══════════════════════════ */
.hero {
  position: relative;
  min-height: 100vh;
  display: grid;
  grid-template-columns: 1fr 1fr;
  align-items: center;
  overflow: hidden;
  padding: 0 40px;
  gap: 0;
}
.hero__bg-text {
  position: absolute;
  right: -0.1em;
  top: 50%;
  transform: translateY(-55%);
  font-family: var(--font-display);
  font-size: clamp(200px, 30vw, 420px);
  font-weight: 700;
  line-height: 1;
  color: rgba(255,255,255,0.03);
  pointer-events: none;
  user-select: none;
  letter-spacing: -0.05em;
  z-index: 0;
}
.hero__media {
  position: relative;
  height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1;
}
.hero__img-collage {
  position: relative;
  width: 100%;
  height: 70vh;
}
.hero-img {
  position: absolute;
  border-radius: var(--radius-card);
  object-fit: cover;
  box-shadow: 0 20px 60px rgba(0,0,0,0.5);
}
.hero-img--1 {
  width: 62%;
  height: 75%;
  top: 5%;
  left: 5%;
  border: 2px solid rgba(255,0,0,0.3);
  z-index: 2;
}
.hero-img--2 {
  width: 55%;
  height: 65%;
  bottom: 2%;
  right: 2%;
  border: 2px solid rgba(139,0,255,0.3);
  z-index: 3;
}
.hero__glass-accent {
  position: absolute;
  width: 180px; height: 180px;
  border-radius: 50%;
  background: rgba(255,0,0,0.12);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid rgba(255,0,0,0.2);
  top: 40%;
  left: 40%;
  z-index: 1;
  pointer-events: none;
}
.hero__content {
  position: relative;
  z-index: 2;
  text-align: right;
  padding: 40px 0 40px 40px;
}
.hero__eyebrow {
  font-family: var(--font-ui);
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--c-red);
  margin-bottom: 16px;
}
.hero__title {
  font-family: var(--font-display);
  font-size: clamp(2.4rem, 5vw, 4.2rem);
  font-weight: 700;
  line-height: 1.12;
  color: var(--c-white);
  margin-bottom: 20px;
  letter-spacing: -0.02em;
}
.hero__sub {
  font-size: 1rem;
  color: var(--c-white-60);
  max-width: 420px;
  margin-left: auto;
  margin-bottom: 36px;
  line-height: 1.7;
}
.hero__cta-row {
  display: flex;
  gap: 12px;
  justify-content: flex-end;
  flex-wrap: wrap;
}
.btn-primary {
  display: inline-flex; align-items: center;
  height: 48px; padding: 0 28px;
  border-radius: var(--radius-pill);
  background: linear-gradient(135deg, var(--c-red), var(--c-violet));
  color: #fff;
  font-family: var(--font-ui);
  font-size: 0.82rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  box-shadow: 0 6px 24px rgba(255,0,0,0.35);
  transition: transform var(--transition), box-shadow var(--transition);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 12px 32px rgba(255,0,0,0.5); }
.btn-ghost {
  display: inline-flex; align-items: center;
  height: 48px; padding: 0 28px;
  border-radius: var(--radius-pill);
  background: var(--c-glass-bg);
  backdrop-filter: var(--blur-glass-sm);
  -webkit-backdrop-filter: var(--blur-glass-sm);
  border: 1px solid var(--c-glass-border);
  color: var(--c-white-80);
  font-family: var(--font-ui);
  font-size: 0.82rem;
  font-weight: 500;
  transition: background var(--transition), border-color var(--transition);
}
.btn-ghost:hover { background: var(--c-glass-hover); border-color: rgba(255,255,255,0.35); }

/* ══════════════════════════
   主内容区通用
══════════════════════════ */
#main-content { flex: 1; }
.home-content-area {
  max-width: var(--max-content);
  margin: 0 auto;
  padding: 48px 20px 0;
}
.home-content-area:empty { display: none; }

/* ══════════════════════════
   区块标题
══════════════════════════ */
.section-header {
  max-width: var(--max-content);
  margin: 0 auto 32px;
  padding: 0 20px;
}
.section-eyebrow {
  display: block;
  font-family: var(--font-ui);
  font-size: 0.68rem;
  font-weight: 600;
  letter-spacing: 0.22em;
  color: var(--c-red);
  margin-bottom: 8px;
}
.section-title {
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 3vw, 2.6rem);
  font-weight: 700;
  color: var(--c-white);
  letter-spacing: -0.01em;
}

/* ══════════════════════════
   专题卡片网格
══════════════════════════ */
.topics-section { padding: 64px 0; }
.topics-grid {
  max-width: var(--max-content);
  margin: 0 auto;
  padding: 0 20px;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 20px;
}
.topic-glass-card {
  background: var(--c-glass-bg);
  backdrop-filter: var(--blur-glass);
  -webkit-backdrop-filter: var(--blur-glass);
  border: 1px solid var(--c-glass-border);
  border-radius: var(--radius-card);
  padding: 28px 24px 24px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  position: relative;
  overflow: hidden;
  transition: transform var(--transition), box-shadow var(--transition), background var(--transition);
  animation: fadeUpIn 0.5s ease both;
  animation-delay: calc(var(--stagger, 0) * 0.08s);
}
.topic-glass-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--c-red), var(--c-violet));
  border-radius: var(--radius-card) var(--radius-card) 0 0;
}
.topic-glass-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 16px 48px rgba(0,0,0,0.4), 0 0 24px rgba(255,0,0,0.15);
  background: var(--c-glass-hover);
}
.card-eyebrow {
  font-family: var(--font-ui);
  font-size: 0.65rem;
  font-weight: 600;
  letter-spacing: 0.2em;
  color: var(--c-violet-dim);
}
.card-title {
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 600;
  line-height: 1.3;
}
.card-title a { color: var(--c-white); transition: color var(--transition); }
.card-title a:hover { color: var(--c-red); }
.card-desc {
  font-size: 0.82rem;
  color: var(--c-text-muted);
  line-height: 1.6;
  flex: 1;
}
.card-meta { font-size: 0.72rem; color: var(--c-text-dim); }
.card-link-btn {
  display: inline-flex;
  align-items: center;
  height: 36px;
  padding: 0 16px;
  border-radius: var(--radius-pill);
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  color: var(--c-red);
  border: 1px solid rgba(255,0,0,0.3);
  background: rgba(255,0,0,0.06);
  align-self: flex-start;
  transition: background var(--transition), border-color var(--transition), color var(--transition);
}
.card-link-btn:hover {
  background: rgba(255,0,0,0.15);
  border-color: rgba(255,0,0,0.6);
  color: var(--c-white);
}

/* ══════════════════════════
   近期文章网格
══════════════════════════ */
.recent-section { padding: 48px 0 72px; }
.recent-grid {
  max-width: var(--max-content);
  margin: 0 auto;
  padding: 0 20px;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 16px;
}
.recent-item {
  background: var(--c-glass-bg);
  backdrop-filter: var(--blur-glass-sm);
  -webkit-backdrop-filter: var(--blur-glass-sm);
  border: 1px solid var(--c-glass-border);
  border-radius: var(--radius-card);
  padding: 24px 20px;
  display: flex; flex-direction: column; gap: 10px;
  transition: transform var(--transition), background var(--transition);
  animation: fadeUpIn 0.5s ease both;
  animation-delay: calc(var(--stagger, 0) * 0.07s);
}
.recent-item:hover { transform: translateY(-3px); background: var(--c-glass-hover); }
.recent-item__meta {
  display: flex; align-items: center; gap: 10px; flex-wrap: wrap;
}
.recent-item__tag {
  font-size: 0.65rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  color: var(--c-violet-dim);
  background: rgba(139,0,255,0.12);
  padding: 2px 10px;
  border-radius: var(--radius-pill);
  border: 1px solid rgba(139,0,255,0.25);
}
.art-date, .recent-item__meta time {
  font-size: 0.72rem;
  color: var(--c-text-dim);
  font-family: var(--font-ui);
}
.recent-item__title {
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: 600;
  line-height: 1.35;
}
.recent-item__title a { color: var(--c-white); transition: color var(--transition); }
.recent-item__title a:hover { color: var(--c-red); }
.recent-item__desc { font-size: 0.8rem; color: var(--c-text-muted); line-height: 1.6; }

/* ══════════════════════════
   专题页 Hero
══════════════════════════ */
.topic-hero {
  position: relative;
  padding: 72px 20px 56px;
  overflow: hidden;
  border-bottom: 1px solid var(--c-glass-border);
}
.topic-hero__bg-num {
  position: absolute;
  right: 5%;
  top: 50%;
  transform: translateY(-50%);
  font-family: var(--font-display);
  font-size: clamp(120px, 18vw, 240px);
  font-weight: 700;
  color: rgba(255,255,255,0.03);
  pointer-events: none;
  user-select: none;
  letter-spacing: -0.05em;
}
.topic-hero__inner {
  max-width: var(--max-content);
  margin: 0 auto;
  position: relative; z-index: 1;
}
.topic-hero__title {
  font-family: var(--font-display);
  font-size: clamp(2rem, 4vw, 3.4rem);
  font-weight: 700;
  color: var(--c-white);
  margin-bottom: 16px;
  letter-spacing: -0.02em;
  line-height: 1.15;
}
.topic-hero__desc { font-size: 1rem; color: var(--c-white-60); max-width: 600px; margin-bottom: 20px; }
.topic-hero__stats { display: flex; gap: 12px; flex-wrap: wrap; }
.stat-badge {
  display: inline-flex; align-items: center;
  height: 30px; padding: 0 14px;
  border-radius: var(--radius-pill);
  font-size: 0.72rem; font-weight: 600;
  background: rgba(255,0,0,0.12);
  border: 1px solid rgba(255,0,0,0.28);
  color: var(--c-red);
}

/* ── 专题页布局 ── */
.topic-layout {
  max-width: var(--max-content);
  margin: 0 auto;
  padding: 48px 20px 64px;
  display: grid;
  grid-template-columns: 1fr 300px;
  gap: 32px;
  align-items: start;
}
.topic-main { min-width: 0; }
.topic-content-article { margin-bottom: 48px; }

/* ── 正文 prose ── */
.topic-prose, .article-body { }
.prose-inner {
  font-size: 1rem;
  line-height: 1.8;
  color: var(--c-text);
}
.prose-inner h2 {
  font-family: var(--font-display);
  font-size: 1.7rem;
  font-weight: 700;
  margin: 2em 0 0.75em;
  color: var(--c-white);
  letter-spacing: -0.01em;
}
.prose-inner h3 {
  font-family: var(--font-display);
  font-size: 1.3rem;
  font-weight: 600;
  margin: 1.6em 0 0.6em;
  color: var(--c-white-80);
}
.prose-inner p { margin-bottom: 1.2em; }
.prose-inner a { color: var(--c-red); text-decoration: underline; text-decoration-color: rgba(255,0,0,0.35); }
.prose-inner a:hover { text-decoration-color: var(--c-red); }
.prose-inner ul, .prose-inner ol {
  padding-left: 1.4em;
  margin-bottom: 1.2em;
  color: var(--c-text-muted);
}
.prose-inner li { margin-bottom: 0.4em; }
.prose-inner blockquote {
  border-left: 3px solid var(--c-red);
  padding: 12px 20px;
  margin: 1.5em 0;
  background: rgba(255,0,0,0.06);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  color: var(--c-white-80);
}
.prose-inner strong { color: var(--c-white); font-weight: 600; }
.prose-inner time { color: var(--c-text-muted); font-size: 0.88em; }

/* ── 子页列表 ── */
.topic-children { margin-top: 16px; }
.children-heading {
  font-family: var(--font-display);
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--c-white);
  margin-bottom: 24px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--c-glass-border);
}
.children-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}
.child-card {
  background: var(--c-glass-bg);
  backdrop-filter: var(--blur-glass-sm);
  -webkit-backdrop-filter: var(--blur-glass-sm);
  border: 1px solid var(--c-glass-border);
  border-radius: var(--radius-card);
  overflow: hidden;
  display: flex; flex-direction: column;
  transition: transform var(--transition), background var(--transition), box-shadow var(--transition);
  animation: fadeUpIn 0.5s ease both;
  animation-delay: calc(var(--stagger, 0) * 0.06s);
}
.child-card:hover {
  transform: translateY(-3px);
  background: var(--c-glass-hover);
  box-shadow: 0 12px 32px rgba(0,0,0,0.3);
}
.child-card__thumb img { width: 100%; height: 160px; object-fit: cover; }
.child-card__body { padding: 20px 18px; display: flex; flex-direction: column; gap: 8px; flex: 1; }
.child-card__meta { font-size: 0.7rem; color: var(--c-text-dim); }
.child-card__title { font-family: var(--font-display); font-size: 1.1rem; font-weight: 600; line-height: 1.3; }
.child-card__title a { color: var(--c-white); transition: color var(--transition); }
.child-card__title a:hover { color: var(--c-red); }
.child-card__desc { font-size: 0.8rem; color: var(--c-text-muted); line-height: 1.6; flex: 1; }
.child-card__cta {
  display: inline-flex; align-items: center;
  font-size: 0.72rem; font-weight: 600;
  color: var(--c-red);
  letter-spacing: 0.04em;
  margin-top: 4px;
  transition: gap var(--transition);
}
.child-card__cta:hover { gap: 4px; }

/* ══════════════════════════
   侧栏
══════════════════════════ */
.topic-sidebar, .article-sidebar, .about-sidebar, .privacy-sidebar {
  display: flex; flex-direction: column; gap: 20px;
  position: sticky; top: calc(var(--header-h) + 20px);
}
.sidebar-glass {
  background: var(--c-glass-bg);
  backdrop-filter: var(--blur-glass);
  -webkit-backdrop-filter: var(--blur-glass);
  border: 1px solid var(--c-glass-border);
  border-radius: var(--radius-card);
  padding: 22px 20px;
}
.sidebar-title {
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 700;
  color: var(--c-white);
  margin-bottom: 16px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--c-glass-border);
  letter-spacing: 0.02em;
}
.sidebar-nav-link, .sidebar-topic-link {
  display: flex;
  align-items: center;
  min-height: 40px;
  padding: 6px 0;
  font-size: 0.82rem;
  color: var(--c-white-60);
  border-bottom: 1px solid var(--c-white-10);
  transition: color var(--transition), padding-left var(--transition);
}
.sidebar-nav-link:last-child, .sidebar-topic-link:last-child { border-bottom: none; }
.sidebar-nav-link:hover, .sidebar-topic-link:hover { color: var(--c-red); padding-left: 4px; }
.sidebar-empty, .sidebar-note-text { font-size: 0.8rem; color: var(--c-text-dim); line-height: 1.6; }

/* ══════════════════════════
   文章页
══════════════════════════ */
.article-layout {
  max-width: var(--max-content);
  margin: 0 auto;
  padding: 48px 20px 64px;
  display: grid;
  grid-template-columns: 1fr 300px;
  gap: 32px;
  align-items: start;
}
.article-main { min-width: 0; }
.article-header {
  margin-bottom: 36px;
}
.article-title {
  font-family: var(--font-display);
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 700;
  color: var(--c-white);
  line-height: 1.15;
  margin-bottom: 16px;
  letter-spacing: -0.02em;
}
.article-lead {
  font-size: 1.1rem;
  color: var(--c-white-60);
  line-height: 1.7;
  margin-bottom: 20px;
  max-width: 680px;
}
.article-dates {
  display: flex; align-items: center; gap: 10px;
  flex-wrap: wrap;
  margin-bottom: 20px;
}
.date-label {
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  color: var(--c-text-dim);
}
.date-val {
  font-size: 0.82rem;
  color: var(--c-text-muted);
  background: var(--c-white-10);
  padding: 2px 10px;
  border-radius: var(--radius-pill);
  border: 1px solid var(--c-glass-border);
}
.article-hero-wrap {
  border-radius: var(--radius-card);
  overflow: hidden;
  margin-bottom: 8px;
  border: 1px solid var(--c-glass-border);
}
.article-hero-img { width: 100%; height: auto; max-height: 420px; object-fit: cover; }
.article-body {
  margin-bottom: 32px;
}
.article-prose { max-width: 720px; }
.article-footer-meta {
  padding-top: 20px;
  border-top: 1px solid var(--c-glass-border);
  font-size: 0.82rem;
  color: var(--c-text-muted);
}
.article-topic-link a { color: var(--c-red); }
.article-topic-link a:hover { text-decoration: underline; }

/* ── 兄弟文章侧栏 ── */
.sibling-card {
  padding: 14px 0;
  border-bottom: 1px solid var(--c-white-10);
  animation: fadeUpIn 0.4s ease both;
  animation-delay: calc(var(--stagger, 0) * 0.06s);
}
.sibling-card:last-child { border-bottom: none; }
.sibling-card__title { font-family: var(--font-display); font-size: 0.95rem; font-weight: 600; margin-bottom: 4px; line-height: 1.35; }
.sibling-card__title a { color: var(--c-white-80); transition: color var(--transition); }
.sibling-card__title a:hover { color: var(--c-red); }
.sibling-card__desc { font-size: 0.75rem; color: var(--c-text-dim); line-height: 1.5; }

/* ══════════════════════════
   关于页
══════════════════════════ */
.about-hero {
  position: relative;
  padding: 80px 20px 60px;
  overflow: hidden;
  border-bottom: 1px solid var(--c-glass-border);
}
.about-hero__bg-text {
  position: absolute;
  left: -0.1em;
  top: 50%;
  transform: translateY(-50%);
  font-family: var(--font-display);
  font-size: clamp(100px, 16vw, 220px);
  font-weight: 700;
  color: rgba(255,255,255,0.03);
  pointer-events: none;
  user-select: none;
  letter-spacing: -0.05em;
}
.about-hero__inner { max-width: var(--max-content); margin: 0 auto; position: relative; z-index: 1; }
.about-hero__title {
  font-family: var(--font-display);
  font-size: clamp(2rem, 4vw, 3.4rem);
  font-weight: 700;
  color: var(--c-white);
  margin-bottom: 16px;
  letter-spacing: -0.02em;
}
.about-hero__sub { font-size: 1rem; color: var(--c-white-60); max-width: 560px; }
.about-layout {
  max-width: var(--max-content);
  margin: 0 auto;
  padding: 48px 20px 64px;
  display: grid;
  grid-template-columns: 1fr 300px;
  gap: 32px;
  align-items: start;
}
.about-main { min-width: 0; }
.about-prose { margin-bottom: 40px; }
.about-section-title {
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--c-white);
  margin-bottom: 20px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--c-glass-border);
}
.about-topics-section, .about-links-section { margin-bottom: 40px; }
.about-topics-tags { display: flex; flex-wrap: wrap; gap: 10px; }
.about-topic-tag {
  display: inline-flex; align-items: center;
  height: 38px; padding: 0 18px;
  border-radius: var(--radius-pill);
  font-size: 0.8rem; font-weight: 500;
  background: var(--c-glass-bg);
  border: 1px solid var(--c-glass-border);
  color: var(--c-white-80);
  transition: background var(--transition), border-color var(--transition), color var(--transition);
}
.about-topic-tag:hover {
  background: rgba(255,0,0,0.12);
  border-color: rgba(255,0,0,0.35);
  color: var(--c-white);
}
.about-links-row { display: flex; gap: 12px; flex-wrap: wrap; }
.about-link-card {
  display: inline-flex; align-items: center;
  height: 44px; padding: 0 22px;
  border-radius: var(--radius-pill);
  background: var(--c-glass-bg);
  border: 1px solid var(--c-glass-border);
  font-size: 0.85rem; font-weight: 500;
  color: var(--c-white-80);
  backdrop-filter: var(--blur-glass-sm);
  -webkit-backdrop-filter: var(--blur-glass-sm);
  transition: background var(--transition), border-color var(--transition);
}
.about-link-card:hover { background: var(--c-glass-hover); border-color: rgba(255,255,255,0.35); }
.about-info-dl dt {
  font-size: 0.7rem; font-weight: 600; letter-spacing: 0.1em;
  color: var(--c-text-dim); margin-top: 12px; margin-bottom: 2px;
}
.about-info-dl dd { font-size: 0.85rem; color: var(--c-white-80); }
.about-info-dl dt:first-child { margin-top: 0; }

/* ══════════════════════════
   隐私页
══════════════════════════ */
.privacy-header-block {
  max-width: var(--max-content);
  margin: 0 auto;
  padding: 56px 20px 40px;
  border-bottom: 1px solid var(--c-glass-border);
}
.privacy-page-title {
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 3.5vw, 3rem);
  font-weight: 700;
  color: var(--c-white);
  margin-bottom: 12px;
  letter-spacing: -0.02em;
}
.privacy-page-sub { font-size: 1rem; color: var(--c-white-60); margin-bottom: 12px; }
.privacy-updated { font-size: 0.8rem; color: var(--c-text-dim); }
.privacy-layout {
  max-width: var(--max-content);
  margin: 0 auto;
  padding: 48px 20px 64px;
  display: grid;
  grid-template-columns: 1fr 300px;
  gap: 32px;
  align-items: start;
}
.privacy-main { min-width: 0; }
.privacy-prose { margin-bottom: 32px; }
.privacy-footer-links { display: flex; gap: 12px; flex-wrap: wrap; padding-top: 24px; border-top: 1px solid var(--c-glass-border); }
.privacy-link-btn {
  display: inline-flex; align-items: center;
  height: 44px; padding: 0 22px;
  border-radius: var(--radius-pill);
  background: var(--c-glass-bg);
  border: 1px solid var(--c-glass-border);
  font-size: 0.85rem; font-weight: 500;
  color: var(--c-white-80);
  backdrop-filter: var(--blur-glass-sm);
  -webkit-backdrop-filter: var(--blur-glass-sm);
  transition: background var(--transition), border-color var(--transition);
}
.privacy-link-btn:hover { background: var(--c-glass-hover); border-color: rgba(255,255,255,0.35); }

/* ══════════════════════════
   页脚
══════════════════════════ */
.site-footer {
  margin-top: auto;
  background: rgba(20,10,10,0.85);
  backdrop-filter: var(--blur-glass-sm);
  -webkit-backdrop-filter: var(--blur-glass-sm);
  border-top: 1px solid var(--c-glass-border);
}
.footer-top {
  border-bottom: 1px solid var(--c-glass-border);
  padding: 40px 20px;
}
.footer-form-block {
  max-width: var(--max-content);
  margin: 0 auto;
  display: flex;
  align-items: center;
  gap: 32px;
  flex-wrap: wrap;
}
.footer-form-title {
  font-family: var(--font-display);
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--c-white);
  min-width: 160px;
}
.footer-form-desc { font-size: 0.82rem; color: var(--c-text-muted); flex: 1; min-width: 180px; }
.subscribe-form {
  display: flex;
  gap: 8px;
  align-items: center;
  flex-shrink: 0;
}
.sub-input {
  height: 44px;
  padding: 0 16px;
  border-radius: var(--radius-pill);
  background: var(--c-white-10);
  border: 1px solid var(--c-glass-border);
  color: var(--c-white);
  font-family: var(--font-ui);
  font-size: 0.82rem;
  width: 220px;
  transition: border-color var(--transition);
  outline: none;
}
.sub-input::placeholder { color: var(--c-text-dim); }
.sub-input:focus { border-color: rgba(255,0,0,0.5); }
.sub-btn {
  display: inline-flex; align-items: center; justify-content: center;
  height: 44px; padding: 0 22px;
  border-radius: var(--radius-pill);
  background: linear-gradient(135deg, var(--c-red), var(--c-violet));
  color: #fff;
  font-family: var(--font-ui);
  font-size: 0.82rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  transition: transform var(--transition), box-shadow var(--transition);
  box-shadow: 0 4px 16px rgba(255,0,0,0.3);
  white-space: nowrap;
}
.sub-btn:hover { transform: translateY(-1px); box-shadow: 0 8px 24px rgba(255,0,0,0.45); }

.footer-main {
  max-width: var(--max-content);
  margin: 0 auto;
  padding: 40px 20px;
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 40px;
}
.footer-logo {
  display: inline-block;
  font-family: var(--font-display);
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--c-white);
  margin-bottom: 14px;
  transition: color var(--transition);
}
.footer-logo:hover { color: var(--c-red); }
.footer-brand-desc { font-size: 0.82rem; color: var(--c-text-muted); line-height: 1.7; max-width: 320px; }
.footer-nav-dl { }
.footer-nav-dt {
  font-family: var(--font-ui);
  font-size: 0.65rem;
  font-weight: 700;
  letter-spacing: 0.2em;
  color: var(--c-text-dim);
  margin-bottom: 14px;
}
.footer-nav-dl dd { margin-bottom: 4px; }
.footer-nav-dl dd a {
  display: inline-flex;
  align-items: center;
  min-height: 40px;
  font-size: 0.82rem;
  color: var(--c-white-60);
  transition: color var(--transition), padding-left var(--transition);
  padding: 4px 0;
}
.footer-nav-dl dd a:hover { color: var(--c-red); padding-left: 4px; }
.footer-bottom {
  border-top: 1px solid var(--c-white-10);
  padding: 16px 20px;
  text-align: center;
}
.footer-copyright { font-size: 0.72rem; color: var(--c-text-dim); letter-spacing: 0.04em; }

/* ══════════════════════════
   动效
══════════════════════════ */
@keyframes fadeUpIn {
  from { opacity: 0; transform: translateY(18px); }
  to   { opacity: 1; transform: translateY(0); }
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    transition-duration: 0.001ms !important;
  }
}

/* ══════════════════════════
   响应式
══════════════════════════ */
@media (max-width: 900px) {
  .topic-layout, .article-layout, .about-layout, .privacy-layout {
    grid-template-columns: 1fr;
  }
  .topic-sidebar, .article-sidebar, .about-sidebar, .privacy-sidebar {
    position: static;
  }
  .children-grid { grid-template-columns: 1fr; }
  .hero { grid-template-columns: 1fr; padding: 100px 20px 60px; min-height: auto; }
  .hero__media { display: none; }
  .hero__content { text-align: left; padding: 0; }
  .hero__sub { margin-left: 0; }
  .hero__cta-row { justify-content: flex-start; }
  .footer-main { grid-template-columns: 1fr; gap: 28px; }
}

@media (max-width: 640px) {
  html { font-size: 17px; }
  .pill-nav { display: none; }
  .mobile-menu-btn { display: flex; }
  .header-inner { gap: 12px; }
  .topics-grid { grid-template-columns: 1fr; }
  .recent-grid { grid-template-columns: 1fr; }
  .footer-form-block { flex-direction: column; align-items: flex-start; gap: 16px; }
  .subscribe-form { width: 100%; }
  .sub-input { width: 100%; flex: 1; }
  .hero__title { font-size: 2.2rem; }
  .about-hero__title { font-size: 2rem; }
  .topic-hero__title { font-size: 2rem; }
  .footer-main { padding: 32px 20px; }
  .privacy-header-block { padding: 40px 20px 28px; }
  .topic-hero { padding: 48px 20px 40px; }
  .about-hero { padding: 56px 20px 40px; }
  .about-links-row { flex-direction: column; }
  .privacy-footer-links { flex-direction: column; }
}

@media (max-width: 375px) {
  .nav-pill { padding: 0 10px; font-size: 0.66rem; }
  .hero__title { font-size: 1.9rem; }
}