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

/* ===== 变量 & 重置 ===== */
:root {
  --c-bg: #0D0D0D;
  --c-accent: #FF3864;
  --c-teal: #1AFFD5;
  --c-surface: rgba(255,255,255,0.04);
  --c-surface-hover: rgba(255,255,255,0.08);
  --c-border: rgba(255,255,255,0.1);
  --c-text: #E8E8E8;
  --c-text-muted: #888;
  --c-text-dim: #555;
  --radius: 4px;
  --nav-h: 60px;
  --font-main: 'Outfit', 'Rubik', system-ui, sans-serif;
  --font-alt: 'Rubik', 'Outfit', system-ui, sans-serif;
  --transition: 0.3s cubic-bezier(0.4,0,0.2,1);
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; font-size: 17px; }

body {
  background: var(--c-bg);
  color: var(--c-text);
  font-family: var(--font-main);
  line-height: 1.7;
  min-height: 100vh;
  overflow-x: hidden;
}

img { max-width: 100%; height: auto; display: block; }
a { color: var(--c-teal); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--c-accent); }
ul, ol { list-style: none; }
button, input { font-family: inherit; font-size: inherit; }

/* ===== 导航栏 ===== */
.nav-bar {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 900;
  height: var(--nav-h);
  background: rgba(13,13,13,0.92);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-top: 1px solid var(--c-border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 20px;
}

.brand {
  font-family: var(--font-alt);
  font-weight: 700;
  font-size: 1rem;
  color: var(--c-accent);
  letter-spacing: 0.02em;
  white-space: nowrap;
  min-height: 40px;
  display: flex;
  align-items: center;
  padding: 0 8px;
}
.brand:hover { color: var(--c-teal); }

.nav-details { position: static; }
.nav-details summary { list-style: none; }
.nav-details summary::-webkit-details-marker { display: none; }

.nav-toggle {
  display: flex;
  align-items: center;
  cursor: pointer;
  min-height: 44px;
  min-width: 44px;
  justify-content: center;
  border-radius: var(--radius);
  padding: 0 8px;
}
.nav-toggle:hover .hamburger i { background: var(--c-accent); }

.hamburger {
  display: flex;
  flex-direction: column;
  gap: 5px;
  width: 24px;
}
.hamburger i {
  display: block;
  height: 2px;
  background: var(--c-text);
  border-radius: 2px;
  transition: transform var(--transition), opacity var(--transition), background var(--transition);
}

.nav-details[open] .hamburger i:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-details[open] .hamburger i:nth-child(2) { opacity: 0; }
.nav-details[open] .hamburger i:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

.nav-overlay {
  position: fixed;
  inset: 0;
  bottom: var(--nav-h);
  background: rgba(13,13,13,0.97);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 32px;
  z-index: 800;
  animation: overlayIn 0.3s ease forwards;
}

@keyframes overlayIn {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}

.nav-menu {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  width: 100%;
  max-width: 500px;
  padding: 0 24px;
}

.nav-menu li a {
  display: block;
  font-family: var(--font-alt);
  font-weight: 600;
  font-size: 1.1rem;
  color: var(--c-text);
  padding: 12px 20px;
  border-radius: var(--radius);
  border: 1px solid transparent;
  width: 100%;
  text-align: center;
  min-height: 44px;
  transition: all var(--transition);
}
.nav-menu li a:hover {
  color: var(--c-teal);
  border-color: var(--c-teal);
  background: rgba(26,255,213,0.06);
}

.nav-search {
  width: 100%;
  max-width: 400px;
  padding: 0 24px;
}
.nav-search input {
  width: 100%;
  background: var(--c-surface);
  border: 1px solid var(--c-border);
  border-radius: var(--radius);
  color: var(--c-text);
  padding: 12px 16px;
  outline: none;
  font-size: 1rem;
  transition: border-color var(--transition);
}
.nav-search input:focus { border-color: var(--c-teal); }

/* ===== 玻璃拟态 ===== */
.glass-card {
  background: var(--c-surface);
  border: 1px solid var(--c-border);
  border-radius: var(--radius);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  transition: background var(--transition), border-color var(--transition), transform var(--transition);
}
.glass-card:hover {
  background: var(--c-surface-hover);
  border-color: rgba(255,56,100,0.3);
}

/* ===== 主体布局（aside + main） ===== */
body {
  padding-bottom: var(--nav-h);
}

.global-aside {
  position: fixed;
  left: 0;
  top: 0;
  bottom: var(--nav-h);
  width: 220px;
  background: rgba(13,13,13,0.7);
  border-right: 1px solid var(--c-border);
  overflow-y: auto;
  z-index: 100;
  padding: 24px 16px;
  display: flex;
  flex-direction: column;
}

.aside-inner {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-top: 20px;
}

.aside-inner h2 {
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  color: var(--c-accent);
  text-transform: uppercase;
}

.aside-links {
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.aside-links li a {
  display: block;
  color: var(--c-text-muted);
  font-size: 0.88rem;
  padding: 8px 10px;
  border-radius: var(--radius);
  min-height: 36px;
  line-height: 1.4;
  transition: all var(--transition);
  border-left: 2px solid transparent;
}
.aside-links li a:hover {
  color: var(--c-teal);
  border-left-color: var(--c-teal);
  background: rgba(26,255,213,0.05);
}

.aside-sep {
  border: none;
  border-top: 1px solid var(--c-border);
  margin: 8px 0;
}

.aside-home-link {
  font-size: 0.85rem;
  color: var(--c-text-dim);
  padding: 8px 10px;
  display: block;
  min-height: 36px;
}
.aside-home-link:hover { color: var(--c-accent); }

.aside-note { font-size: 0.8rem; color: var(--c-text-dim); line-height: 1.5; padding: 8px 10px; }

main {
  margin-left: 220px;
  min-height: calc(100vh - var(--nav-h));
}

.wrap {
  width: 100%;
  max-width: 860px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ===== Kinetic Typography 动效 ===== */
@keyframes gradientShift {
  0% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
  100% { background-position: 0% 50%; }
}

@keyframes typeIn {
  from { opacity: 0; transform: translateY(24px) skewY(2deg); }
  to { opacity: 1; transform: translateY(0) skewY(0deg); }
}

@keyframes glowPulse {
  0%, 100% { text-shadow: 0 0 20px rgba(255,56,100,0.5); }
  50% { text-shadow: 0 0 40px rgba(255,56,100,0.9), 0 0 80px rgba(26,255,213,0.3); }
}

@keyframes neonSpin {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

@keyframes fadeSlideUp {
  from { opacity: 0; transform: translateY(40px); }
  to { opacity: 1; transform: translateY(0); }
}

.kinetic-line {
  display: inline-block;
  background: linear-gradient(135deg, #FF3864 0%, #1AFFD5 50%, #FF3864 100%);
  background-size: 200% auto;
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  animation: gradientShift 4s linear infinite, typeIn 0.8s ease both;
}

/* ===== 首页 Hero ===== */
.hero-section {
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding: 80px 0 40px;
  position: relative;
  overflow: hidden;
}

.hero-inner {
  display: flex;
  align-items: center;
  gap: 48px;
  width: 100%;
}

.hero-left {
  flex: 0 0 260px;
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
}

.hero-bg-text {
  position: absolute;
  font-family: var(--font-alt);
  font-size: clamp(80px, 14vw, 160px);
  font-weight: 700;
  color: rgba(255,56,100,0.06);
  white-space: nowrap;
  user-select: none;
  letter-spacing: -0.04em;
  line-height: 1;
  z-index: 0;
}

.neon-ring {
  width: 180px;
  height: 180px;
  border-radius: 50%;
  border: 2px solid transparent;
  border-top-color: var(--c-accent);
  border-right-color: var(--c-teal);
  animation: neonSpin 3s linear infinite;
  position: absolute;
}

.hero-badge {
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  background: var(--c-surface);
  border: 1px solid var(--c-border);
  border-radius: var(--radius);
  padding: 20px 28px;
  backdrop-filter: blur(12px);
}

.badge-num {
  font-family: var(--font-alt);
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--c-accent);
  line-height: 1;
  animation: glowPulse 2s ease-in-out infinite;
}

.badge-label {
  font-size: 0.8rem;
  color: var(--c-teal);
  letter-spacing: 0.12em;
  margin-top: 4px;
}

.hero-right {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 20px;
  text-align: center;
}

.hero-h1 {
  font-family: var(--font-alt);
  font-size: clamp(1.6rem, 4vw, 2.8rem);
  font-weight: 700;
  line-height: 1.2;
}

.hero-desc {
  font-size: 1rem;
  color: var(--c-text-muted);
  line-height: 1.7;
  max-width: 480px;
  margin: 0 auto;
}

.hero-cta {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}

.btn-primary {
  display: inline-flex;
  align-items: center;
  padding: 13px 28px;
  background: var(--c-accent);
  color: #fff;
  font-weight: 700;
  font-size: 1rem;
  border-radius: var(--radius);
  min-height: 44px;
  transition: all var(--transition);
  border: 2px solid var(--c-accent);
}
.btn-primary:hover {
  background: transparent;
  color: var(--c-accent);
}

.btn-ghost {
  display: inline-flex;
  align-items: center;
  padding: 13px 28px;
  background: transparent;
  color: var(--c-teal);
  font-weight: 600;
  font-size: 1rem;
  border-radius: var(--radius);
  min-height: 44px;
  border: 2px solid var(--c-teal);
  transition: all var(--transition);
}
.btn-ghost:hover {
  background: var(--c-teal);
  color: var(--c-bg);
}

/* ===== 正文内容区 ===== */
.content-section,
.topic-content-section,
.tag-content-section,
.about-content-section,
.privacy-content-section,
.article-section {
  padding: 48px 0;
}

.page-content {
  font-size: 1rem;
  line-height: 1.8;
  color: var(--c-text);
}

.page-content.glass-card {
  padding: 32px;
}

.page-content h2 {
  font-family: var(--font-alt);
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--c-teal);
  margin: 32px 0 8px;
}

.page-content h3 {
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--c-accent);
  margin: 24px 0 6px;
}

.page-content p { margin-bottom: 16px; }

.page-content ul, .page-content ol {
  list-style: disc;
  padding-left: 24px;
  margin-bottom: 16px;
}

.page-content ol { list-style: decimal; }

.page-content li { margin-bottom: 6px; }

.page-content a {
  color: var(--c-teal);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-content blockquote {
  border-left: 3px solid var(--c-accent);
  padding: 12px 20px;
  margin: 20px 0;
  background: rgba(255,56,100,0.05);
  border-radius: 0 var(--radius) var(--radius) 0;
}

.page-content code {
  background: rgba(26,255,213,0.08);
  color: var(--c-teal);
  padding: 2px 6px;
  border-radius: 3px;
  font-size: 0.9em;
}

/* ===== 通用区块 ===== */
.reveal-section { padding: 48px 0; }

.reveal-section h2 {
  font-family: var(--font-alt);
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--c-text);
  margin-bottom: 6px;
}

.subtitle {
  color: var(--c-text-muted);
  font-size: 0.95rem;
  line-height: 1.6;
  margin-bottom: 28px;
}

/* ===== 首页：话题卡片列表 ===== */
.topic-list {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 16px;
  list-style: none;
  counter-reset: none;
}

.topic-card a {
  display: block;
  padding: 24px 20px;
  height: 100%;
  position: relative;
  overflow: hidden;
}

.topic-card h3 {
  font-size: 1rem;
  font-weight: 700;
  color: var(--c-text);
  margin-bottom: 8px;
  transition: color var(--transition);
}

.topic-card:hover h3 { color: var(--c-teal); }

.card-num {
  display: block;
  font-family: var(--font-alt);
  font-size: 2rem;
  font-weight: 700;
  color: rgba(255,56,100,0.15);
  line-height: 1;
  margin-bottom: 12px;
}

.card-count {
  display: block;
  font-size: 0.8rem;
  color: var(--c-text-dim);
  margin-top: 10px;
}

/* ===== 首页：文章列表 ===== */
.art-list {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 16px;
}

.art-card a {
  display: block;
  padding: 20px;
}

.art-card h3 {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--c-text);
  margin: 8px 0 6px;
  line-height: 1.4;
}

.art-tag {
  display: inline-block;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--c-accent);
  border: 1px solid rgba(255,56,100,0.4);
  padding: 2px 8px;
  border-radius: 2px;
  text-transform: uppercase;
}

.art-card time {
  display: block;
  font-size: 0.78rem;
  color: var(--c-text-dim);
  margin-top: 8px;
}

/* ===== 话题页 Hero ===== */
.topic-hero {
  padding: 80px 0 40px;
  position: relative;
  overflow: hidden;
  min-height: 35vh;
  display: flex;
  align-items: flex-end;
}

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

.topic-bg-num {
  position: absolute;
  right: -20px;
  top: 50%;
  transform: translateY(-50%);
  font-family: var(--font-alt);
  font-size: clamp(120px, 20vw, 220px);
  font-weight: 700;
  color: rgba(26,255,213,0.04);
  user-select: none;
  line-height: 1;
  pointer-events: none;
}

.topic-eyebrow {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.82rem;
  color: var(--c-text-dim);
  margin-bottom: 16px;
}

.topic-eyebrow a { color: var(--c-text-muted); }
.topic-eyebrow a:hover { color: var(--c-teal); }
.topic-eyebrow span { color: var(--c-text-dim); }

.topic-h1, .tag-h1, .about-h1, .privacy-h1 {
  font-family: var(--font-alt);
  font-size: clamp(1.6rem, 4vw, 2.6rem);
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: 12px;
}

/* ===== 子页列表 ===== */
.child-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
  list-style: none;
  counter-reset: list-counter;
}

.child-list li a,
.tag-article-item a {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 20px;
  text-decoration: none;
  color: var(--c-text);
}

.item-index {
  font-family: var(--font-alt);
  font-size: 1.6rem;
  font-weight: 700;
  color: rgba(255,56,100,0.2);
  min-width: 44px;
  flex-shrink: 0;
  line-height: 1;
}

.item-body {
  flex: 1;
}

.item-body strong {
  display: block;
  font-size: 1rem;
  font-weight: 600;
  color: var(--c-text);
  margin-bottom: 4px;
  line-height: 1.4;
  transition: color var(--transition);
}

.child-list li:hover .item-body strong,
.tag-article-item:hover .item-body strong { color: var(--c-teal); }

.item-body .subtitle { margin-bottom: 4px; font-size: 0.88rem; }

.item-body small { font-size: 0.78rem; color: var(--c-text-dim); }

.item-arrow {
  color: var(--c-text-dim);
  font-size: 1.1rem;
  flex-shrink: 0;
  transition: color var(--transition), transform var(--transition);
}

.child-list li:hover .item-arrow { color: var(--c-accent); transform: translateX(4px); }

/* ===== 文章页 ===== */
.article-body {
  padding: 40px;
}

.article-meta {
  margin-bottom: 24px;
}

.breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.82rem;
  color: var(--c-text-dim);
  flex-wrap: wrap;
  margin-bottom: 12px;
}

.breadcrumb a { color: var(--c-text-muted); }
.breadcrumb a:hover { color: var(--c-teal); }

.article-dates {
  display: flex;
  gap: 20px;
  font-size: 0.82rem;
  color: var(--c-text-dim);
}

.article-h1 {
  font-family: var(--font-alt);
  font-size: clamp(1.5rem, 3vw, 2.2rem);
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: 12px;
}

.article-lead {
  font-size: 1.05rem;
  color: var(--c-text-muted);
  margin-bottom: 28px;
}

.article-hero-wrap {
  margin-bottom: 28px;
  border-radius: var(--radius);
  overflow: hidden;
}

.article-hero-img {
  width: 100%;
  height: auto;
  object-fit: cover;
}

.article-content {
  font-size: 1rem;
  line-height: 1.85;
}

.article-content h2 {
  font-family: var(--font-alt);
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--c-teal);
  margin: 36px 0 8px;
}

.article-content h3 {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--c-accent);
  margin: 24px 0 6px;
}

.article-content p { margin-bottom: 16px; }

.article-content ul { list-style: disc; padding-left: 24px; margin-bottom: 16px; }
.article-content ol { list-style: decimal; padding-left: 24px; margin-bottom: 16px; }
.article-content li { margin-bottom: 6px; }

.article-content a { color: var(--c-teal); text-decoration: underline; text-underline-offset: 3px; }

.article-content blockquote {
  border-left: 3px solid var(--c-accent);
  padding: 12px 20px;
  margin: 20px 0;
  background: rgba(255,56,100,0.05);
  border-radius: 0 var(--radius) var(--radius) 0;
  font-style: italic;
}

.article-tags {
  margin-top: 32px;
  padding-top: 20px;
  border-top: 1px solid var(--c-border);
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
}

.tags-label { font-size: 0.85rem; color: var(--c-text-dim); }

.tag-chip {
  display: inline-block;
  padding: 5px 12px;
  border: 1px solid var(--c-border);
  border-radius: 2px;
  font-size: 0.8rem;
  color: var(--c-text-muted);
  transition: all var(--transition);
  min-height: 28px;
}

.tag-chip:hover {
  border-color: var(--c-teal);
  color: var(--c-teal);
  background: rgba(26,255,213,0.05);
}

/* ===== 标签页 ===== */
.tag-prefix {
  color: var(--c-text-dim);
  font-size: 0.7em;
  font-weight: 400;
}

/* ===== 关于页 ===== */
.about-hero {
  padding: 80px 0 40px;
  position: relative;
  overflow: hidden;
  min-height: 35vh;
  display: flex;
  align-items: flex-end;
}

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

.about-bg-text {
  position: absolute;
  left: -20px;
  bottom: -20px;
  font-family: var(--font-alt);
  font-size: clamp(100px, 18vw, 200px);
  font-weight: 700;
  color: rgba(26,255,213,0.04);
  user-select: none;
  line-height: 1;
  pointer-events: none;
}

/* ===== 隐私页 ===== */
.privacy-hero {
  padding: 80px 0 40px;
}

.privacy-hero-inner { }

.privacy-updated {
  font-size: 0.85rem;
  color: var(--c-text-dim);
  margin-top: 12px;
}

.privacy-doc { padding: 40px; }

/* ===== 页脚 ===== */
.site-footer {
  background: rgba(10,10,10,0.95);
  border-top: 1px solid var(--c-border);
  margin-left: 220px;
}

.footer-top {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 40px;
  padding: 56px 40px 40px;
  max-width: 1100px;
  margin: 0 auto;
}

.footer-logo {
  display: block;
  font-family: var(--font-alt);
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--c-accent);
  margin-bottom: 10px;
}

.footer-brand p {
  font-size: 0.85rem;
  color: var(--c-text-dim);
  line-height: 1.6;
}

.footer-nav-col strong,
.footer-contact strong {
  display: block;
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--c-text-muted);
  margin-bottom: 14px;
  text-transform: uppercase;
}

.footer-nav-col nav ul {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.footer-nav-col nav ul li a {
  color: var(--c-text-dim);
  font-size: 0.88rem;
  min-height: 32px;
  display: flex;
  align-items: center;
  transition: color var(--transition);
}

.footer-nav-col nav ul li a:hover { color: var(--c-teal); }

.subscribe-form {
  display: flex;
  gap: 8px;
  margin-bottom: 12px;
  flex-wrap: wrap;
}

.subscribe-form input {
  flex: 1;
  min-width: 140px;
  background: var(--c-surface);
  border: 1px solid var(--c-border);
  border-radius: var(--radius);
  color: var(--c-text);
  padding: 10px 14px;
  outline: none;
  font-size: 0.88rem;
  transition: border-color var(--transition);
}

.subscribe-form input:focus { border-color: var(--c-teal); }

.subscribe-form button {
  padding: 10px 18px;
  background: var(--c-accent);
  color: #fff;
  border: none;
  border-radius: var(--radius);
  font-weight: 600;
  cursor: pointer;
  min-height: 40px;
  font-size: 0.88rem;
  transition: background var(--transition);
}

.subscribe-form button:hover { background: #e02050; }

.footer-note {
  font-size: 0.78rem;
  color: var(--c-text-dim);
  line-height: 1.5;
}

.footer-bottom {
  border-top: 1px solid var(--c-border);
  padding: 20px 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 10px;
  max-width: 1100px;
  margin: 0 auto;
}

.footer-bottom-nav {
  display: flex;
  gap: 24px;
  flex-wrap: wrap;
  justify-content: center;
}

.footer-bottom-nav a {
  color: var(--c-text-dim);
  font-size: 0.85rem;
  min-height: 32px;
  display: flex;
  align-items: center;
  transition: color var(--transition);
}

.footer-bottom-nav a:hover { color: var(--c-teal); }

.copyright {
  font-size: 0.78rem;
  color: var(--c-text-dim);
  text-align: center;
}

/* ===== Scroll Reveal 动效 ===== */
.reveal-item {
  opacity: 0;
  transform: translateY(32px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.reveal-item.revealed {
  opacity: 1;
  transform: translateY(0);
}

.reveal-section > * {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.5s ease, transform 0.5s ease;
}

.reveal-section.section-revealed > * {
  opacity: 1;
  transform: translateY(0);
}

/* ===== 轮播区（仅首页英雄轮播条） ===== */
.ticker-wrap {
  overflow: hidden;
  border-top: 1px solid var(--c-border);
  border-bottom: 1px solid var(--c-border);
  background: var(--c-surface);
  padding: 12px 0;
  margin: 0 0 48px;
}

.ticker-track {
  display: flex;
  gap: 60px;
  animation: tickerScroll 20s linear infinite;
  white-space: nowrap;
}

.ticker-track span {
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  color: var(--c-text-dim);
  flex-shrink: 0;
}

.ticker-track span.accent { color: var(--c-accent); }

@keyframes tickerScroll {
  from { transform: translateX(0); }
  to { transform: translateX(-50%); }
}

/* ===== 话题 hero ===== */
.topic-desc { max-width: 600px; }

/* ===== prefers-reduced-motion ===== */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
  .kinetic-line {
    -webkit-text-fill-color: var(--c-accent);
    background: none;
  }
  .reveal-item, .reveal-section > * {
    opacity: 1;
    transform: none;
  }
}

/* ===== 响应式 ===== */
@media (max-width: 900px) {
  .global-aside {
    display: none;
  }

  main, .site-footer {
    margin-left: 0;
  }

  .footer-top {
    grid-template-columns: 1fr 1fr;
    padding: 40px 20px 32px;
    gap: 28px;
  }

  .footer-bottom {
    padding: 16px 20px;
  }
}

@media (max-width: 640px) {
  html { font-size: 16px; }

  .wrap { padding: 0 16px; }

  .hero-section {
    padding: 24px 0 32px;
    min-height: auto;
  }

  .hero-inner {
    flex-direction: column;
    gap: 32px;
  }

  .hero-left { flex: none; width: 100%; height: 180px; }

  .hero-right { text-align: center; }

  .neon-ring { width: 140px; height: 140px; }

  .topic-list {
    grid-template-columns: 1fr;
  }

  .art-list {
    grid-template-columns: 1fr;
  }

  .footer-top {
    grid-template-columns: 1fr;
  }

  .article-body { padding: 24px 16px; }

  .privacy-doc { padding: 24px 16px; }

  .page-content.glass-card { padding: 24px 16px; }

  .topic-hero { min-height: 28vh; padding: 60px 0 24px; }

  .about-hero { min-height: 28vh; padding: 60px 0 24px; }

  .child-list li a, .tag-article-item a {
    flex-wrap: wrap;
    gap: 10px;
  }

  .footer-bottom-nav {
    gap: 14px;
  }

  .subscribe-form {
    flex-direction: column;
  }

  .subscribe-form button {
    width: 100%;
  }

  .hero-cta {
    gap: 10px;
  }

  .btn-primary, .btn-ghost {
    width: 100%;
    justify-content: center;
  }
}

@media (max-width: 375px) {
  .brand { font-size: 0.85rem; }
  .nav-menu li a { font-size: 1rem; }
}