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

/* ===== CSS 变量 ===== */
:root {
  --c-primary: #ff0080;
  --c-secondary: #ff00ff;
  --c-dark: #26171f;
  --c-dark2: #1a0f16;
  --c-dark3: #2e1a26;
  --c-text: #f0e0ec;
  --c-text-muted: #c8a0bc;
  --c-border: rgba(255, 0, 128, 0.25);
  --c-card-bg: rgba(46, 26, 38, 0.85);
  --radius-card: 28px;
  --radius-sm: 12px;
  --radius-btn: 50px;
  --shadow-card: 0 8px 32px rgba(255, 0, 128, 0.18), 0 2px 8px rgba(0,0,0,0.4);
  --shadow-hover: 0 16px 48px rgba(255, 0, 255, 0.28), 0 4px 16px rgba(0,0,0,0.5);
  --font-main: 'Quicksand', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  --font-display: 'Caveat', 'Quicksand', cursive;
  --nav-h: 64px;
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ===== 重置 ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { font-size: 16px; scroll-behavior: smooth; }
body {
  font-family: var(--font-main);
  font-size: 1rem;
  line-height: 1.7;
  background-color: var(--c-dark);
  color: var(--c-text);
  min-height: 100vh;
  padding-bottom: calc(var(--nav-h) + 16px);
  overflow-x: hidden;
}
img { max-width: 100%; height: auto; display: block; }
a { color: var(--c-primary); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--c-secondary); }
ul, ol { list-style: none; }
button, input { font-family: inherit; }

/* ===== Aurora Mesh 背景 ===== */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  z-index: -2;
  background:
    radial-gradient(ellipse 80% 60% at 20% 10%, rgba(255,0,128,0.18) 0%, transparent 60%),
    radial-gradient(ellipse 60% 50% at 80% 30%, rgba(255,0,255,0.14) 0%, transparent 55%),
    radial-gradient(ellipse 70% 40% at 50% 80%, rgba(255,0,128,0.10) 0%, transparent 60%),
    var(--c-dark);
  animation: auroraShift 12s ease-in-out infinite alternate;
}
@keyframes auroraShift {
  0%   { filter: hue-rotate(0deg) brightness(1); }
  50%  { filter: hue-rotate(20deg) brightness(1.08); }
  100% { filter: hue-rotate(-15deg) brightness(0.95); }
}
@media (prefers-reduced-motion: reduce) {
  body::before { animation: none; }
}

/* ===== 全息光晕 shimmer ===== */
.holographic {
  position: relative;
  overflow: hidden;
}
.holographic::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, transparent 40%, rgba(255,255,255,0.06) 50%, transparent 60%);
  animation: shimmer 3s linear infinite;
  pointer-events: none;
}
@keyframes shimmer {
  0%   { transform: translateX(-100%) skewX(-20deg); }
  100% { transform: translateX(200%) skewX(-20deg); }
}
@media (prefers-reduced-motion: reduce) {
  .holographic::after { animation: none; }
}

/* ===== 导航（底部固定条）===== */
.site-header {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: rgba(26, 15, 22, 0.96);
  border-top: 1px solid var(--c-border);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  box-shadow: 0 -4px 24px rgba(255,0,128,0.15);
}
.brand-bar {
  text-align: center;
  padding: 6px 16px 2px;
  border-bottom: 1px solid rgba(255,0,128,0.12);
}
.brand-name {
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: 700;
  background: linear-gradient(90deg, var(--c-primary), var(--c-secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  letter-spacing: 0.03em;
}
.main-nav {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
}
.main-nav::-webkit-scrollbar { display: none; }
.main-nav p {
  display: flex;
  align-items: center;
  gap: 0;
  padding: 0 8px;
  white-space: nowrap;
  min-height: 42px;
}
.main-nav p a {
  display: inline-flex;
  align-items: center;
  padding: 8px 10px;
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--c-text-muted);
  border-radius: var(--radius-sm);
  min-height: 40px;
  transition: color var(--transition), background var(--transition);
  letter-spacing: 0.02em;
  flex-shrink: 0;
}
.main-nav p a:hover {
  color: var(--c-primary);
  background: rgba(255,0,128,0.1);
}

/* ===== 英雄区（首页）===== */
.hero-section {
  min-height: 100vh;
  display: flex;
  align-items: stretch;
}
.hero-inner {
  display: flex;
  flex-direction: row;
  width: 100%;
  position: relative;
  overflow: hidden;
}
.hero-media {
  flex: 0 0 50%;
  position: relative;
  overflow: hidden;
}
.hero-mesh {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 80% 100% at 30% 50%, rgba(255,0,128,0.35) 0%, transparent 70%),
    radial-gradient(ellipse 60% 80% at 70% 20%, rgba(255,0,255,0.25) 0%, transparent 60%);
  mix-blend-mode: screen;
  animation: meshPulse 6s ease-in-out infinite alternate;
}
@keyframes meshPulse {
  0%   { opacity: 0.7; transform: scale(1); }
  100% { opacity: 1; transform: scale(1.05); }
}
@media (prefers-reduced-motion: reduce) {
  .hero-mesh, .tag-hero-mesh, .inner-hero-mesh, .topic-hero-mesh { animation: none; }
}
.hero-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.hero-text {
  flex: 0 0 50%;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: flex-end;
  text-align: right;
  padding: 80px 48px 80px 32px;
  position: relative;
  z-index: 2;
}
.hero-text h1 {
  font-family: var(--font-display);
  font-size: clamp(2rem, 4vw, 3.2rem);
  font-weight: 700;
  line-height: 1.2;
  background: linear-gradient(135deg, #fff 0%, var(--c-primary) 50%, var(--c-secondary) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 20px;
}
.hero-desc {
  font-size: 1.05rem;
  color: var(--c-text-muted);
  margin-bottom: 32px;
  max-width: 380px;
}
.hero-slash {
  position: absolute;
  top: 0;
  left: calc(50% - 40px);
  bottom: 0;
  width: 80px;
  background: linear-gradient(135deg, transparent 48%, rgba(255,0,128,0.25) 49%, rgba(255,0,255,0.18) 51%, transparent 52%);
  pointer-events: none;
  z-index: 3;
}

/* ===== 按钮 ===== */
.btn-primary {
  display: inline-flex;
  align-items: center;
  padding: 14px 32px;
  background: linear-gradient(135deg, var(--c-primary), var(--c-secondary));
  color: #fff;
  font-weight: 700;
  font-size: 1rem;
  border-radius: var(--radius-btn);
  min-height: 48px;
  box-shadow: 0 4px 20px rgba(255,0,128,0.4);
  transition: transform var(--transition), box-shadow var(--transition);
  letter-spacing: 0.04em;
}
.btn-primary:hover {
  color: #fff;
  transform: translateY(-2px);
  box-shadow: 0 8px 32px rgba(255,0,255,0.5);
}

/* ===== 主容器 ===== */
.wrap {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 20px;
}

/* ===== 正文容器嵌套（契约要求 main > div.wrap > article > section）===== */
.home-main > .wrap > article > section,
.topic-main > .wrap > article > section,
.article-main > .wrap > article > section,
.about-main > .wrap > article > section,
.privacy-main > .wrap > article > section,
.tag-main > .wrap > article > section,
.default-main > .wrap > article > section {
  display: block;
}

/* ===== 区块通用 ===== */
.content-section,
.topics-section,
.articles-section,
.children-section,
.tag-articles,
.topic-content-section,
.about-section,
.privacy-section,
.default-section,
.tag-content-section {
  padding: 64px 0;
}

/* ===== 眉题 (eyebrow + h2) ===== */
.eyebrow {
  display: inline-block;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--c-primary);
  background: rgba(255,0,128,0.1);
  border: 1px solid rgba(255,0,128,0.3);
  border-radius: 50px;
  padding: 3px 12px;
  margin-bottom: 12px;
}
.topics-section h2,
.articles-section h2,
.children-section h2,
.tag-articles h2 {
  font-family: var(--font-display);
  font-size: clamp(1.5rem, 3vw, 2.2rem);
  font-weight: 700;
  margin-bottom: 32px;
  background: linear-gradient(90deg, #fff, var(--c-text-muted));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* ===== 卡片网格 ===== */
.card-grid {
  display: grid;
  gap: 24px;
}
.topics-grid { grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); }
.articles-grid { grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); }

.card {
  background: var(--c-card-bg);
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-card);
  border: 1px solid var(--c-border);
  transition: transform var(--transition), box-shadow var(--transition);
  position: relative;
  overflow: hidden;
}
.card::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(255,0,128,0.06), rgba(255,0,255,0.04));
  pointer-events: none;
}
.card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-hover);
}
.card-link {
  display: block;
  color: inherit;
}
.card-link:hover { color: inherit; }
.card-body {
  padding: 24px 28px;
}
.card-body h3 {
  font-family: var(--font-display);
  font-size: 1.15rem;
  font-weight: 700;
  color: #fff;
  margin-bottom: 8px;
  line-height: 1.3;
}
.card-body p {
  font-size: 0.88rem;
  color: var(--c-text-muted);
  line-height: 1.6;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.card-cta {
  display: inline-block;
  margin-top: 12px;
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--c-primary);
  letter-spacing: 0.05em;
}
.card-date {
  display: block;
  font-size: 0.75rem;
  color: var(--c-secondary);
  margin-bottom: 6px;
  letter-spacing: 0.06em;
}

/* ===== 正文内容 ===== */
.page-content,
.article-content,
.topic-content,
.about-content,
.privacy-content,
.default-content,
.tag-content {
  font-size: 1rem;
  line-height: 1.8;
  color: var(--c-text);
}
.page-content h2, .article-content h2, .topic-content h2,
.about-content h2, .privacy-content h2, .default-content h2, .tag-content h2 {
  font-family: var(--font-display);
  font-size: 1.6rem;
  font-weight: 700;
  margin: 2em 0 0.8em;
  color: #fff;
}
.page-content h3, .article-content h3, .topic-content h3,
.about-content h3, .privacy-content h3, .default-content h3, .tag-content h3 {
  font-size: 1.2rem;
  font-weight: 700;
  margin: 1.6em 0 0.6em;
  color: var(--c-primary);
}
.page-content p, .article-content p, .topic-content p,
.about-content p, .privacy-content p, .default-content p, .tag-content p {
  margin-bottom: 1.2em;
}
.page-content ul, .article-content ul, .topic-content ul,
.about-content ul, .privacy-content ul, .default-content ul, .tag-content ul {
  list-style: disc;
  padding-left: 1.6em;
  margin-bottom: 1.2em;
}
.page-content ol, .article-content ol, .topic-content ol,
.about-content ol, .privacy-content ol, .default-content ol, .tag-content ol {
  list-style: decimal;
  padding-left: 1.6em;
  margin-bottom: 1.2em;
}
.page-content a, .article-content a, .topic-content a,
.about-content a, .privacy-content a, .default-content a, .tag-content a {
  color: var(--c-primary);
  text-decoration: underline;
  text-decoration-color: rgba(255,0,128,0.4);
}
.page-content a:hover, .article-content a:hover {
  color: var(--c-secondary);
}

/* ===== 文章页 ===== */
.article-main {
  padding-top: 48px;
}
.article-header {
  margin-bottom: 32px;
}
.article-header h1 {
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  font-weight: 700;
  line-height: 1.25;
  margin: 16px 0 12px;
  background: linear-gradient(135deg, #fff 30%, var(--c-primary) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.article-meta {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 24px;
}
.article-meta time {
  font-size: 0.82rem;
  color: var(--c-secondary);
  letter-spacing: 0.04em;
}
.article-hero-wrap {
  border-radius: var(--radius-card);
  overflow: hidden;
  margin-bottom: 32px;
}
.article-hero-img {
  width: 100%;
  height: auto;
  max-height: 400px;
  object-fit: cover;
}

/* ===== 面包屑 ===== */
.breadcrumb {
  display: inline-flex;
  align-items: center;
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--c-text-muted);
  padding: 6px 14px;
  background: rgba(255,0,128,0.08);
  border-radius: var(--radius-sm);
  border: 1px solid rgba(255,0,128,0.15);
  margin-bottom: 16px;
  min-height: 40px;
  transition: background var(--transition);
}
.breadcrumb:hover {
  background: rgba(255,0,128,0.15);
  color: var(--c-primary);
}

/* ===== 文章列表 (ol > li > a + small) ===== */
.article-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
}
.article-item {
  background: var(--c-card-bg);
  border-radius: 16px;
  border: 1px solid var(--c-border);
  padding: 16px 20px;
  transition: border-color var(--transition), transform var(--transition);
}
.article-item:hover {
  border-color: var(--c-primary);
  transform: translateX(4px);
}
.article-item a {
  display: flex;
  align-items: center;
  gap: 12px;
  color: #fff;
  font-weight: 600;
  font-size: 0.95rem;
  margin-bottom: 6px;
}
.article-item a:hover { color: var(--c-primary); }
.item-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--c-primary), var(--c-secondary));
  font-size: 0.7rem;
  font-weight: 700;
  color: #fff;
  flex-shrink: 0;
}
.item-title { flex: 1; }
.article-item small {
  display: block;
  font-size: 0.82rem;
  color: var(--c-text-muted);
  padding-left: 40px;
  line-height: 1.5;
}

/* ===== 页面日期 ===== */
.page-date {
  font-size: 0.82rem;
  color: var(--c-text-muted);
  margin-top: 32px;
  padding-top: 16px;
  border-top: 1px solid var(--c-border);
}
.page-date time { color: var(--c-secondary); }

/* ===== 侧边栏 ===== */
.global-aside {
  max-width: 1100px;
  margin: 0 auto 48px;
  padding: 0 20px;
}
.aside-inner {
  background: var(--c-card-bg);
  border-radius: var(--radius-card);
  border: 1px solid var(--c-border);
  padding: 28px 32px;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 24px 32px;
  align-items: start;
}
.aside-inner h3 {
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 700;
  color: #fff;
  margin-bottom: 12px;
  grid-column: 1 / -1;
}
.aside-inner > h3:not(:first-of-type) {
  margin-top: 8px;
}
.aside-links {
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.aside-link-item {
  display: block;
  padding: 8px 14px;
  border-radius: var(--radius-sm);
  background: rgba(255,0,128,0.07);
  border: 1px solid rgba(255,0,128,0.12);
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--c-text-muted);
  transition: all var(--transition);
  min-height: 40px;
  display: flex;
  align-items: center;
}
.aside-link-item:hover {
  background: rgba(255,0,128,0.16);
  border-color: var(--c-primary);
  color: var(--c-primary);
}
.aside-link { color: var(--c-primary); font-weight: 600; font-size: 0.88rem; }

/* ===== 标签链接 ===== */
.tag-links {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}
.tag-links a {
  display: inline-flex;
  align-items: center;
  padding: 6px 16px;
  border-radius: 50px;
  background: linear-gradient(135deg, rgba(255,0,128,0.15), rgba(255,0,255,0.1));
  border: 1px solid rgba(255,0,255,0.25);
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--c-text-muted);
  min-height: 36px;
  transition: all var(--transition);
}
.tag-links a:hover {
  background: linear-gradient(135deg, var(--c-primary), var(--c-secondary));
  color: #fff;
  border-color: transparent;
}

/* ===== 英雄（内页）===== */
.inner-hero,
.topic-hero,
.tag-hero,
.about-hero,
.privacy-hero {
  position: relative;
  padding: 80px 20px 60px;
  text-align: center;
  overflow: hidden;
  margin-bottom: 0;
}
.inner-hero-mesh,
.topic-hero-mesh,
.tag-hero-mesh {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 70% 80% at 30% 50%, rgba(255,0,128,0.22) 0%, transparent 65%),
    radial-gradient(ellipse 50% 60% at 75% 25%, rgba(255,0,255,0.18) 0%, transparent 55%);
  animation: meshPulse 7s ease-in-out infinite alternate;
  z-index: 0;
}
.inner-hero-text,
.topic-hero-text,
.tag-hero-content {
  position: relative;
  z-index: 1;
  max-width: 720px;
  margin: 0 auto;
}
.inner-hero-text h1,
.topic-hero-text h1,
.tag-hero-content h1 {
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 4vw, 3rem);
  font-weight: 700;
  line-height: 1.2;
  background: linear-gradient(135deg, #fff 0%, var(--c-primary) 60%, var(--c-secondary) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 16px;
}
.topic-hero-text h1 { text-align: left; }
.inner-hero-text p,
.topic-hero-text p,
.tag-hero-content p {
  font-size: 1rem;
  color: var(--c-text-muted);
  line-height: 1.7;
  max-width: 560px;
  margin: 0 auto;
}
.topic-hero-inner {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 20px;
  position: relative;
  z-index: 1;
}
.topic-hero {
  text-align: left;
}

/* ===== 标签页 ===== */
.tag-badge {
  display: inline-flex;
  align-items: center;
  padding: 6px 20px;
  background: linear-gradient(135deg, var(--c-primary), var(--c-secondary));
  border-radius: 50px;
  font-size: 1.1rem;
  font-weight: 700;
  color: #fff;
  -webkit-text-fill-color: #fff;
}

/* ===== 相关文章 ===== */
.related-articles {
  margin-bottom: 32px;
}
.related-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-top: 12px;
}
.related-list li a {
  display: block;
  padding: 8px 14px;
  border-radius: var(--radius-sm);
  background: rgba(255,0,128,0.06);
  border: 1px solid rgba(255,0,128,0.12);
  font-size: 0.88rem;
  color: var(--c-text-muted);
  transition: all var(--transition);
  min-height: 40px;
  display: flex;
  align-items: center;
}
.related-list li a:hover {
  background: rgba(255,0,128,0.15);
  color: var(--c-primary);
  border-color: var(--c-primary);
}

/* ===== 页脚 ===== */
.site-footer {
  background: var(--c-dark2);
  border-top: 1px solid var(--c-border);
  padding: 48px 0 0;
  margin-bottom: var(--nav-h);
}
.footer-top {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 20px 40px;
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 40px;
}
.footer-brand .footer-logo {
  display: block;
  font-family: var(--font-display);
  font-size: 1.3rem;
  font-weight: 700;
  background: linear-gradient(90deg, var(--c-primary), var(--c-secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 12px;
}
.footer-brand p {
  font-size: 0.85rem;
  color: var(--c-text-muted);
  line-height: 1.6;
}
.footer-subscribe h4,
.footer-nav-col h4 {
  font-size: 0.9rem;
  font-weight: 700;
  color: #fff;
  margin-bottom: 12px;
  letter-spacing: 0.05em;
}
.footer-subscribe p {
  font-size: 0.82rem;
  color: var(--c-text-muted);
  margin-bottom: 12px;
}
.subscribe-form {
  display: flex;
  gap: 8px;
}
.subscribe-form input {
  flex: 1;
  padding: 10px 16px;
  background: rgba(255,255,255,0.06);
  border: 1px solid var(--c-border);
  border-radius: var(--radius-sm);
  color: #fff;
  font-size: 0.85rem;
  min-height: 42px;
  outline: none;
  transition: border-color var(--transition);
}
.subscribe-form input:focus { border-color: var(--c-primary); }
.subscribe-form input::placeholder { color: var(--c-text-muted); }
.subscribe-form button {
  padding: 10px 20px;
  background: linear-gradient(135deg, var(--c-primary), var(--c-secondary));
  color: #fff;
  border: none;
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  font-weight: 700;
  cursor: pointer;
  min-height: 42px;
  transition: opacity var(--transition);
}
.subscribe-form button:hover { opacity: 0.85; }
.footer-nav-col nav {
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.footer-nav-col nav a {
  font-size: 0.85rem;
  color: var(--c-text-muted);
  padding: 4px 0;
  min-height: 32px;
  display: flex;
  align-items: center;
  transition: color var(--transition);
}
.footer-nav-col nav a:hover { color: var(--c-primary); }

.footer-bottom {
  max-width: 1100px;
  margin: 0 auto;
  padding: 16px 20px;
  border-top: 1px solid rgba(255,0,128,0.1);
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
}
.footer-bottom-nav {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}
.footer-bottom-nav a {
  font-size: 0.8rem;
  color: var(--c-text-muted);
  min-height: 40px;
  display: inline-flex;
  align-items: center;
  padding: 0 4px;
  transition: color var(--transition);
}
.footer-bottom-nav a:hover { color: var(--c-primary); }
.copyright {
  font-size: 0.78rem;
  color: rgba(200,160,188,0.5);
}

/* ===== Scroll Reveal ===== */
.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
.reveal.visible {
  opacity: 1;
  transform: none;
}
@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
}

/* ===== 页面主入口 padding-top（不被固定导航遮住）===== */
.home-main,
.article-main,
.topic-main,
.about-main,
.privacy-main,
.tag-main,
.default-main {
  padding-top: 40px;
}
.inner-hero,
.topic-hero,
.tag-hero {
  padding-top: 60px;
}

/* ===== 响应式 ===== */
@media (max-width: 900px) {
  .footer-top { grid-template-columns: 1fr 1fr; }
  .topics-grid { grid-template-columns: repeat(auto-fill, minmax(200px, 1fr)); }
  .articles-grid { grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); }
  .hero-text { padding: 60px 24px 60px 20px; }
}

@media (max-width: 600px) {
  .hero-inner { flex-direction: column; }
  .hero-media { flex: 0 0 45vh; min-height: 45vh; }
  .hero-text {
    flex: 1;
    align-items: flex-start;
    text-align: left;
    padding: 32px 20px;
  }
  .hero-text h1 { font-size: 1.8rem; }
  .hero-slash { display: none; }
  .footer-top { grid-template-columns: 1fr; gap: 28px; }
  .footer-bottom { flex-direction: column; align-items: flex-start; }
  .aside-inner { grid-template-columns: 1fr; }
  .subscribe-form { flex-direction: column; }
  .main-nav p a { font-size: 0.72rem; padding: 8px 8px; }
  .brand-name { font-size: 0.95rem; }
}

@media (max-width: 375px) {
  body { font-size: 16px; }
  .hero-text h1 { font-size: 1.6rem; }
  .card-body { padding: 18px 20px; }
  .topics-grid,
  .articles-grid { grid-template-columns: 1fr; }
}