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

/* ===== CSS 自定义属性 ===== */
:root {
  --mint: #b4fde1;
  --ice: #add8e6;
  --dark: #172620;
  --mint-deep: #7ef0c0;
  --ice-deep: #7abfd4;
  --dark-mid: #243d35;
  --dark-light: #2f5046;
  --white: #ffffff;
  --off-white: #f5fffe;
  --text-main: #172620;
  --text-muted: #3a5a4e;
  --text-light: #6a9484;
  --card-bg: #ffffff;
  --card-border: #b4fde1;
  --radius-card: 24px;
  --radius-btn: 16px;
  --radius-sm: 12px;
  --border-thick: 3px;
  --shadow-clay: 4px 4px 12px rgba(23,38,32,0.15), inset -2px -2px 8px rgba(180,253,225,0.4);
  --shadow-clay-hover: 6px 6px 18px rgba(23,38,32,0.22), inset -2px -2px 10px rgba(180,253,225,0.5);
  --shadow-dark: 4px 4px 12px rgba(23,38,32,0.25), inset -2px -2px 8px rgba(23,38,32,0.1);
  --nav-h: 68px;
  --font-main: 'Rubik', 'Nunito Sans', system-ui, -apple-system, sans-serif;
  --transition-bounce: cubic-bezier(0.34, 1.56, 0.64, 1);
  --transition-ease: cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

/* ===== 重置与基础 ===== */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  font-size: 17px;
  line-height: 1.65;
}

body {
  font-family: var(--font-main);
  background-color: var(--off-white);
  color: var(--text-main);
  min-height: 100vh;
  overflow-x: hidden;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

a {
  color: var(--dark);
  text-decoration: none;
  transition: color 0.2s var(--transition-ease);
}

a:hover {
  color: var(--dark-light);
}

ul, menu {
  list-style: none;
}

/* ===== 导航：details > summary + menu > li > a ===== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--dark);
  box-shadow: 0 2px 12px rgba(23,38,32,0.3);
}

.top-nav {
  display: flex;
  align-items: center;
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 24px;
  height: var(--nav-h);
  gap: 16px;
}

.nav-details {
  flex: 1;
  position: relative;
}

.nav-details[open] > .nav-menu {
  display: flex;
}

.nav-summary {
  display: flex;
  align-items: center;
  gap: 16px;
  cursor: pointer;
  list-style: none;
  padding: 8px 0;
  min-height: 40px;
}

.nav-summary::-webkit-details-marker {
  display: none;
}

.brand-name {
  font-family: 'Rubik', sans-serif;
  font-weight: 700;
  font-size: 1.1rem;
  color: var(--mint);
  white-space: nowrap;
  letter-spacing: 0.01em;
}

.nav-toggle-icon {
  color: var(--mint);
  font-size: 1.5rem;
  line-height: 1;
  display: none;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 4px;
  flex-wrap: wrap;
}

.nav-menu li a {
  display: block;
  padding: 10px 14px;
  color: rgba(180,253,225,0.8);
  font-size: 0.9rem;
  font-weight: 500;
  border-radius: var(--radius-sm);
  white-space: nowrap;
  min-height: 40px;
  display: flex;
  align-items: center;
  transition: background 0.2s var(--transition-ease), color 0.2s;
}

.nav-menu li a:hover,
.nav-menu li a.nav-active {
  background: rgba(180,253,225,0.12);
  color: var(--mint);
}

.nav-search {
  flex-shrink: 0;
}

.search-input {
  background: rgba(180,253,225,0.08);
  border: var(--border-thick) solid rgba(180,253,225,0.3);
  border-radius: var(--radius-btn);
  padding: 10px 16px;
  color: var(--mint);
  font-family: var(--font-main);
  font-size: 0.9rem;
  width: 200px;
  outline: none;
  transition: border-color 0.2s, box-shadow 0.2s;
  min-height: 40px;
}

.search-input::placeholder {
  color: rgba(180,253,225,0.4);
}

.search-input:focus {
  border-color: var(--mint);
  box-shadow: 0 0 0 3px rgba(180,253,225,0.15);
}

/* ===== Hero 区：斜切色带 ===== */
.hero-section {
  position: relative;
  background: linear-gradient(135deg, var(--dark) 0%, var(--dark-mid) 40%, var(--dark-light) 100%);
  min-height: 70vh;
  display: flex;
  align-items: center;
  overflow: hidden;
  padding-bottom: 60px;
}

.hero-section::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse at 20% 50%, rgba(180,253,225,0.08) 0%, transparent 60%),
    radial-gradient(ellipse at 80% 20%, rgba(173,216,230,0.06) 0%, transparent 50%);
  pointer-events: none;
}

.hero-inner {
  position: relative;
  z-index: 2;
  max-width: 1280px;
  margin: 0 auto;
  padding: 80px 48px 60px;
  text-align: left;
  width: 100%;
}

.hero-eyebrow {
  display: inline-block;
  background: rgba(180,253,225,0.15);
  border: 2px solid rgba(180,253,225,0.4);
  color: var(--mint);
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  padding: 6px 16px;
  border-radius: 100px;
  margin-bottom: 24px;
}

.hero-title {
  font-family: 'Rubik', sans-serif;
  font-size: clamp(2rem, 5vw, 3.8rem);
  font-weight: 700;
  color: var(--white);
  line-height: 1.15;
  max-width: 820px;
  margin-bottom: 24px;
}

.hero-desc {
  font-size: 1.15rem;
  color: rgba(255,255,255,0.7);
  max-width: 600px;
  margin-bottom: 40px;
  line-height: 1.7;
}

.hero-actions {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

.hero-slice {
  position: absolute;
  bottom: -1px;
  left: 0;
  right: 0;
  height: 70px;
  background: var(--off-white);
  clip-path: polygon(0 100%, 100% 0, 100% 100%);
}

/* 频道/标签/关于/隐私 hero 变体 */
.channel-hero,
.tag-hero,
.about-hero {
  position: relative;
  background: linear-gradient(135deg, var(--dark) 0%, var(--dark-mid) 60%, var(--dark-light) 100%);
  min-height: 30vh;
  display: flex;
  align-items: center;
  overflow: hidden;
  padding-bottom: 50px;
}

.channel-hero-inner,
.tag-hero-inner,
.about-hero-inner {
  position: relative;
  z-index: 2;
  max-width: 1280px;
  margin: 0 auto;
  padding: 60px 48px 40px;
  width: 100%;
}

.channel-title,
.tag-title,
.about-title {
  font-family: 'Rubik', sans-serif;
  font-size: clamp(1.6rem, 3.5vw, 2.8rem);
  font-weight: 700;
  color: var(--white);
  margin-bottom: 16px;
  line-height: 1.2;
}

.channel-desc,
.tag-desc,
.about-hero-desc {
  color: rgba(255,255,255,0.7);
  font-size: 1.05rem;
  max-width: 560px;
}

.channel-eyebrow,
.tag-eyebrow,
.about-eyebrow,
.privacy-eyebrow {
  display: inline-block;
  background: rgba(180,253,225,0.15);
  border: 2px solid rgba(180,253,225,0.4);
  color: var(--mint);
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  padding: 4px 12px;
  border-radius: 100px;
  margin-bottom: 16px;
}

/* 隐私政策 banner */
.privacy-banner {
  background: var(--dark);
  padding: 48px 48px 32px;
}

.privacy-banner-inner {
  max-width: 1280px;
  margin: 0 auto;
}

.privacy-title {
  font-family: 'Rubik', sans-serif;
  font-size: clamp(1.5rem, 3vw, 2.4rem);
  font-weight: 700;
  color: var(--white);
  margin-bottom: 12px;
}

.privacy-updated {
  color: rgba(255,255,255,0.6);
  font-size: 0.9rem;
}

/* ===== 主内容布局：main > section > article ===== */
.main-content {
  max-width: 1280px;
  margin: 0 auto;
  padding: 48px 24px 64px;
}

.content-with-aside {
  display: grid;
  grid-template-columns: 260px 1fr;
  gap: 32px;
  align-items: start;
}

/* aside 在内容左侧 */
.content-aside {
  position: sticky;
  top: calc(var(--nav-h) + 20px);
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.aside-block {
  padding: 20px;
}

.aside-block h3 {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--dark);
  margin-bottom: 14px;
  padding-bottom: 10px;
  border-bottom: 2px solid var(--mint);
}

.aside-block ul li {
  margin-bottom: 4px;
}

.aside-block ul li a {
  display: block;
  padding: 8px 10px;
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  color: var(--text-muted);
  transition: background 0.2s, color 0.2s;
  min-height: 40px;
  display: flex;
  align-items: center;
}

.aside-block ul li a:hover {
  background: rgba(180,253,225,0.3);
  color: var(--dark);
}

/* ===== Clay 卡片 ===== */
.clay-card {
  background: var(--card-bg);
  border: var(--border-thick) solid var(--card-border);
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-clay);
  transition: transform 0.2s var(--transition-bounce), box-shadow 0.2s var(--transition-ease);
}

.clay-card:hover {
  transform: translateY(-3px) scale(1.01);
  box-shadow: var(--shadow-clay-hover);
}

/* ===== 按钮 ===== */
.clay-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 14px 28px;
  background: var(--mint);
  color: var(--dark);
  font-family: var(--font-main);
  font-size: 1rem;
  font-weight: 700;
  border-radius: var(--radius-btn);
  border: var(--border-thick) solid var(--mint-deep);
  box-shadow: var(--shadow-clay);
  cursor: pointer;
  text-decoration: none;
  transition: transform 0.2s var(--transition-bounce), box-shadow 0.2s, background 0.2s;
  min-height: 48px;
}

.clay-btn:hover {
  transform: translateY(-2px) scale(1.03);
  box-shadow: var(--shadow-clay-hover);
  background: var(--mint-deep);
  color: var(--dark);
}

.clay-btn:active {
  transform: translateY(1px) scale(0.98);
  box-shadow: 2px 2px 6px rgba(23,38,32,0.15), inset -1px -1px 4px rgba(180,253,225,0.3);
}

.hero-btn-primary {
  background: var(--mint);
  border-color: var(--mint-deep);
  color: var(--dark);
}

.hero-btn-secondary {
  background: transparent;
  border: var(--border-thick) solid rgba(173,216,230,0.6);
  color: var(--ice);
}

.hero-btn-secondary:hover {
  background: rgba(173,216,230,0.15);
  color: var(--ice);
  transform: translateY(-2px);
}

/* ===== 首页：频道卡片 ===== */
.home-article {
  width: 100%;
}

.channels-section,
.articles-section {
  margin-top: 56px;
}

.channels-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 20px;
  margin-top: 24px;
}

/* 子页列表：并列 <a> 块（直接子元素是 <strong>） */
.channel-card {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 24px;
  text-decoration: none;
  color: var(--text-main);
}

.channel-card strong {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--dark);
  line-height: 1.3;
  display: block;
}

.channel-card .card-desc {
  font-size: 0.9rem;
  color: var(--text-muted);
  line-height: 1.5;
  flex: 1;
  display: block;
}

.channel-card .card-arrow {
  display: inline-block;
  font-size: 1.2rem;
  color: var(--mint-deep);
  font-weight: 700;
  transition: transform 0.2s var(--transition-bounce);
}

.channel-card:hover .card-arrow {
  transform: translateX(4px);
}

.articles-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 20px;
  margin-top: 24px;
}

.article-card {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 24px;
  text-decoration: none;
  color: var(--text-main);
}

.article-card strong {
  font-size: 1rem;
  font-weight: 700;
  color: var(--dark);
  line-height: 1.35;
  display: block;
}

.article-card .card-desc {
  font-size: 0.88rem;
  color: var(--text-muted);
  line-height: 1.5;
  flex: 1;
  display: block;
}

.card-date {
  font-size: 0.8rem;
  color: var(--text-light);
  font-weight: 500;
}

/* ===== 频道页 子页卡片 ===== */
.children-section {
  margin-top: 48px;
}

.children-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 20px;
  margin-top: 20px;
}

.child-card {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 22px;
  text-decoration: none;
  color: var(--text-main);
}

.child-card strong {
  font-size: 1rem;
  font-weight: 700;
  color: var(--dark);
  display: block;
  line-height: 1.3;
}

.child-card .card-desc {
  font-size: 0.88rem;
  color: var(--text-muted);
  line-height: 1.5;
  display: block;
}

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

.article-body {
  min-width: 0;
}

.article-header-section {
  margin-bottom: 32px;
  padding-bottom: 24px;
  border-bottom: 2px solid var(--mint);
}

.article-title {
  font-family: 'Rubik', sans-serif;
  font-size: clamp(1.5rem, 3vw, 2.4rem);
  font-weight: 700;
  color: var(--dark);
  line-height: 1.2;
  margin: 16px 0 12px;
}

.article-meta {
  display: flex;
  gap: 16px;
  align-items: center;
  flex-wrap: wrap;
}

.article-date,
.article-modified {
  font-size: 0.85rem;
  color: var(--text-light);
  font-weight: 500;
  background: rgba(180,253,225,0.3);
  padding: 4px 12px;
  border-radius: 100px;
}

.related-section {
  margin-top: 48px;
  padding-top: 32px;
  border-top: 2px solid var(--mint);
}

.related-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 16px;
  margin-top: 20px;
}

.related-card {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 20px;
  text-decoration: none;
  color: var(--text-main);
}

.related-card strong {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--dark);
  display: block;
  line-height: 1.3;
}

.related-card .card-desc {
  font-size: 0.85rem;
  color: var(--text-muted);
  display: block;
}

/* ===== 标签页 ===== */
.tag-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 20px;
  margin-top: 20px;
}

.tag-item-card {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 22px;
  text-decoration: none;
  color: var(--text-main);
}

.tag-item-card strong {
  font-size: 1rem;
  font-weight: 700;
  color: var(--dark);
  display: block;
  line-height: 1.3;
}

.tag-item-card .card-desc {
  font-size: 0.88rem;
  color: var(--text-muted);
  display: block;
  line-height: 1.5;
}

.tag-items-section {
  margin-top: 40px;
}

/* ===== 关于页 ===== */
.about-article {
  min-width: 0;
}

.about-links-section {
  margin-top: 48px;
  padding-top: 32px;
  border-top: 2px solid var(--mint);
}

.about-nav-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 16px;
  margin-top: 20px;
}

.about-nav-card {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 22px;
  text-decoration: none;
  color: var(--text-main);
}

.about-nav-card strong {
  font-size: 1rem;
  font-weight: 700;
  color: var(--dark);
  display: block;
}

.about-nav-card span {
  font-size: 0.85rem;
  color: var(--text-muted);
  display: block;
}

/* ===== 隐私政策页 ===== */
.privacy-layout {
  padding-top: 40px;
}

.privacy-article {
  min-width: 0;
}

.privacy-content {
  max-width: 720px;
}

.privacy-nav-section {
  margin-top: 48px;
  padding-top: 32px;
  border-top: 2px solid var(--mint);
}

.privacy-links {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  margin-top: 20px;
}

.privacy-link-card {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 20px 24px;
  text-decoration: none;
  color: var(--text-main);
  min-width: 200px;
}

.privacy-link-card strong {
  font-size: 1rem;
  font-weight: 700;
  color: var(--dark);
  display: block;
}

.privacy-link-card span {
  font-size: 0.85rem;
  color: var(--text-muted);
  display: block;
}

/* ===== 正文内容通用排版 ===== */
.page-content-section {
  font-size: 1rem;
  line-height: 1.75;
  color: var(--text-main);
}

.page-content-section h2 {
  font-family: 'Rubik', sans-serif;
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--dark);
  margin: 2em 0 0.8em;
  padding-left: 16px;
  border-left: 4px solid var(--mint);
}

.page-content-section h3 {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--dark-mid);
  margin: 1.5em 0 0.6em;
}

.page-content-section p {
  margin-bottom: 1.2em;
}

.page-content-section ul,
.page-content-section ol {
  margin: 1em 0 1.2em 1.5em;
  list-style: disc;
}

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

.page-content-section li {
  margin-bottom: 0.4em;
  line-height: 1.65;
}

.page-content-section a {
  color: var(--dark-light);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-content-section a:hover {
  color: var(--dark);
}

.page-content-section blockquote {
  border-left: 4px solid var(--ice);
  padding: 16px 20px;
  background: rgba(173,216,230,0.15);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  margin: 1.5em 0;
  color: var(--text-muted);
}

.page-content-section code {
  background: rgba(180,253,225,0.3);
  border-radius: 6px;
  padding: 2px 6px;
  font-size: 0.9em;
}

.page-content-section pre {
  background: var(--dark);
  color: var(--mint);
  padding: 20px;
  border-radius: var(--radius-sm);
  overflow-x: auto;
  margin: 1.5em 0;
}

/* ===== 标题装饰：h2 > span ===== */
.channels-section h2,
.articles-section h2,
.children-section h2,
.related-section h2,
.about-links-section h2,
.privacy-nav-section h2,
.tag-items-section h2 {
  font-family: 'Rubik', sans-serif;
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--dark);
  display: flex;
  align-items: center;
  gap: 12px;
}

.channels-section h2 span,
.articles-section h2 span,
.children-section h2 span,
.related-section h2 span,
.about-links-section h2 span,
.privacy-nav-section h2 span,
.tag-items-section h2 span {
  position: relative;
  padding-bottom: 6px;
}

.channels-section h2 span::after,
.articles-section h2 span::after,
.children-section h2 span::after,
.related-section h2 span::after,
.about-links-section h2 span::after,
.privacy-nav-section h2 span::after,
.tag-items-section h2 span::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--mint), var(--ice));
  border-radius: 2px;
}

.aside-block h3 span {
  display: block;
}

/* ===== 面包屑 ===== */
.breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.88rem;
  color: rgba(255,255,255,0.6);
  margin-bottom: 16px;
  flex-wrap: wrap;
}

.breadcrumb a {
  color: rgba(180,253,225,0.7);
  text-decoration: none;
  min-height: 40px;
  display: inline-flex;
  align-items: center;
  padding: 4px 0;
}

.breadcrumb a:hover {
  color: var(--mint);
}

.breadcrumb span[aria-hidden] {
  color: rgba(255,255,255,0.4);
}

/* 文章页面包屑（浅色背景） */
.article-header-section .breadcrumb {
  color: var(--text-light);
  margin-bottom: 12px;
}

.article-header-section .breadcrumb a {
  color: var(--dark-light);
}

.article-header-section .breadcrumb a:hover {
  color: var(--dark);
}

.article-header-section .breadcrumb span[aria-hidden] {
  color: var(--text-light);
}

/* ===== 页脚：footer address + ul ===== */
.site-footer {
  background: var(--dark);
  color: rgba(255,255,255,0.8);
  margin-top: 80px;
}

.footer-cta {
  background: linear-gradient(135deg, var(--dark-mid), var(--dark-light));
  text-align: center;
  padding: 64px 24px;
  border-bottom: 2px solid rgba(180,253,225,0.15);
}

.footer-cta h2 {
  font-family: 'Rubik', sans-serif;
  font-size: clamp(1.6rem, 3vw, 2.4rem);
  font-weight: 700;
  color: var(--white);
  margin-bottom: 16px;
}

.footer-cta h2 span {
  display: inline-block;
}

.footer-cta p {
  color: rgba(255,255,255,0.65);
  font-size: 1.05rem;
  margin-bottom: 32px;
  max-width: 480px;
  margin-left: auto;
  margin-right: auto;
}

.cta-btn {
  background: var(--mint);
  color: var(--dark);
  border-color: var(--mint-deep);
}

.footer-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 40px;
  max-width: 1280px;
  margin: 0 auto;
  padding: 56px 24px 40px;
}

.footer-col h3 {
  font-size: 1rem;
  font-weight: 700;
  color: var(--mint);
  margin-bottom: 16px;
  padding-bottom: 8px;
  border-bottom: 2px solid rgba(180,253,225,0.2);
}

.footer-col h3 span {
  display: block;
}

.footer-col address {
  font-style: normal;
  color: rgba(255,255,255,0.55);
  font-size: 0.9rem;
  line-height: 1.7;
}

.footer-col ul li {
  margin-bottom: 4px;
}

.footer-col ul li a {
  color: rgba(255,255,255,0.55);
  font-size: 0.9rem;
  padding: 6px 0;
  display: block;
  transition: color 0.2s;
  min-height: 40px;
  display: flex;
  align-items: center;
}

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

.footer-bottom {
  max-width: 1280px;
  margin: 0 auto;
  padding: 20px 24px;
  border-top: 1px solid rgba(180,253,225,0.1);
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
}

.footer-copy {
  color: rgba(255,255,255,0.4);
  font-size: 0.85rem;
}

.footer-bottom-links {
  display: flex;
  gap: 4px;
}

.footer-bottom-links li a {
  color: rgba(255,255,255,0.4);
  font-size: 0.85rem;
  padding: 8px 12px;
  border-radius: var(--radius-sm);
  transition: color 0.2s, background 0.2s;
  min-height: 40px;
  display: flex;
  align-items: center;
}

.footer-bottom-links li a:hover {
  color: var(--mint);
  background: rgba(180,253,225,0.08);
}

/* ===== 动效 ===== */
@keyframes softBounceIn {
  0% { opacity: 0; transform: translateY(20px) scale(0.95); }
  60% { transform: translateY(-4px) scale(1.02); }
  100% { opacity: 1; transform: translateY(0) scale(1); }
}

@keyframes fadeInLeft {
  from { opacity: 0; transform: translateX(-20px); }
  to { opacity: 1; transform: translateX(0); }
}

.hero-inner,
.channel-hero-inner,
.tag-hero-inner,
.about-hero-inner {
  animation: fadeInLeft 0.5s var(--transition-ease) both;
}

.clay-card {
  animation: softBounceIn 0.4s var(--transition-bounce) both;
}

/* 视差滚动数据属性支持（JS辅助） */
[data-parallax] {
  will-change: transform;
}

/* ===== 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;
    scroll-behavior: auto !important;
  }
}

/* ===== 响应式：平板 ===== */
@media (max-width: 1024px) {
  .content-with-aside {
    grid-template-columns: 220px 1fr;
    gap: 24px;
  }

  .footer-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 32px;
  }

  .hero-inner {
    padding: 60px 32px 40px;
  }
}

/* ===== 响应式：手机 ===== */
@media (max-width: 767px) {
  html {
    font-size: 16px;
  }

  .top-nav {
    padding: 0 16px;
    height: auto;
    min-height: var(--nav-h);
    flex-wrap: wrap;
    gap: 8px;
    padding-top: 8px;
    padding-bottom: 8px;
  }

  .nav-details {
    width: 100%;
    order: 1;
  }

  .nav-search {
    order: 2;
    width: 100%;
  }

  .search-input {
    width: 100%;
  }

  .nav-summary {
    justify-content: space-between;
    width: 100%;
  }

  .nav-toggle-icon {
    display: block;
  }

  .nav-menu {
    display: none;
    flex-direction: column;
    width: 100%;
    padding: 12px 0;
    gap: 2px;
  }

  .nav-details[open] > .nav-menu {
    display: flex;
  }

  .nav-menu li {
    width: 100%;
  }

  .nav-menu li a {
    width: 100%;
    padding: 12px 16px;
    font-size: 1rem;
    min-height: 48px;
  }

  .hero-section {
    min-height: 100svh;
    min-height: 100vh;
  }

  .hero-inner {
    padding: 48px 20px 60px;
  }

  .hero-title {
    font-size: 1.9rem;
  }

  .hero-actions {
    flex-direction: column;
  }

  .clay-btn {
    width: 100%;
    text-align: center;
    min-height: 52px;
  }

  .channel-hero,
  .tag-hero,
  .about-hero {
    min-height: 25vh;
  }

  .channel-hero-inner,
  .tag-hero-inner,
  .about-hero-inner {
    padding: 40px 20px 30px;
  }

  .privacy-banner {
    padding: 32px 20px 24px;
  }

  .main-content {
    padding: 32px 16px 48px;
  }

  .content-with-aside {
    grid-template-columns: 1fr;
  }

  .content-aside {
    position: static;
    order: 2;
  }

  .channel-article,
  .article-body,
  .tag-article,
  .about-article,
  .privacy-article {
    order: 1;
  }

  .footer-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
    padding: 40px 16px 32px;
  }

  .footer-cta {
    padding: 48px 16px;
  }

  .footer-bottom {
    flex-direction: column;
    align-items: flex-start;
    padding: 16px;
  }

  .channels-grid,
  .articles-grid,
  .children-grid,
  .related-grid,
  .tag-grid {
    grid-template-columns: 1fr;
  }

  .about-nav-grid {
    grid-template-columns: 1fr;
  }

  .privacy-links {
    flex-direction: column;
  }

  .footer-col ul li a {
    min-height: 44px;
  }
}

@media (max-width: 480px) {
  .footer-grid {
    grid-template-columns: 1fr;
  }

  .article-title {
    font-size: 1.4rem;
  }
}