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

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

:root {
  --c-green: #00ff80;
  --c-blue: #0000ff;
  --c-black: #000000;
  --c-white: #ffffff;
  --c-gray: #111111;
  --c-gray2: #222222;
  --c-gray3: #333333;
  --c-light: #f0f0f0;
  --border: 2px solid var(--c-black);
  --border-heavy: 3px solid var(--c-black);
  --border-green: 2px solid var(--c-green);
  --font-display: 'Anton', system-ui, sans-serif;
  --font-body: 'Epilogue', system-ui, sans-serif;
  --nav-h: 60px;
  --max-w: 1100px;
  --max-prose: 760px;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
  overflow-x: hidden;
}

body {
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.6;
  background: var(--c-black);
  color: var(--c-white);
  overflow-x: hidden;
}

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

a {
  color: var(--c-green);
  text-decoration: none;
  transition: none;
}

a:hover {
  color: var(--c-white);
  background: var(--c-blue);
}

/* ===== 布局容器 ===== */
.site-wrap {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* ===== 导航栏 ===== */
.nav-bar {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--nav-h);
  background: var(--c-black);
  border-bottom: var(--border-heavy);
  border-bottom-color: var(--c-green);
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 0 16px;
  width: 100%;
}

.nav-brand {
  display: flex;
  align-items: center;
  flex-shrink: 0;
  width: 44px;
  height: 44px;
  background: var(--c-green);
  border: var(--border-heavy);
  justify-content: center;
  text-decoration: none;
}

.nav-brand:hover {
  background: var(--c-blue);
}

.brand-mark {
  font-family: var(--font-display);
  font-size: 1.1rem;
  color: var(--c-black);
  letter-spacing: -1px;
  line-height: 1;
}

.brand-icon {
  width: 32px;
  height: 32px;
  object-fit: contain;
}

.nav-pills {
  display: flex;
  gap: 6px;
  flex: 1;
  overflow-x: auto;
  scrollbar-width: none;
  -ms-overflow-style: none;
}

.nav-pills::-webkit-scrollbar {
  display: none;
}

.pill {
  display: inline-flex;
  align-items: center;
  height: 36px;
  padding: 0 14px;
  border: 2px solid var(--c-green);
  background: transparent;
  color: var(--c-green);
  font-family: var(--font-body);
  font-size: 0.85rem;
  font-weight: 600;
  white-space: nowrap;
  flex-shrink: 0;
  cursor: pointer;
  min-width: max-content;
}

.pill:hover,
.pill-active {
  background: var(--c-green);
  color: var(--c-black);
}

.nav-cta {
  display: inline-flex;
  align-items: center;
  height: 40px;
  padding: 0 18px;
  background: var(--c-blue);
  color: var(--c-white);
  font-family: var(--font-body);
  font-size: 0.9rem;
  font-weight: 700;
  border: 2px solid var(--c-white);
  flex-shrink: 0;
  white-space: nowrap;
}

.nav-cta:hover {
  background: var(--c-green);
  color: var(--c-black);
  border-color: var(--c-green);
}

/* ===== 面包屑 ===== */
.breadcrumb {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 0.85rem;
  color: #888;
  margin-bottom: 16px;
  flex-wrap: wrap;
}

.breadcrumb a {
  color: var(--c-green);
}

.breadcrumb span {
  color: #555;
}

/* ===== 按钮 ===== */
.btn-primary {
  display: inline-flex;
  align-items: center;
  height: 52px;
  padding: 0 32px;
  background: var(--c-green);
  color: var(--c-black);
  font-family: var(--font-display);
  font-size: 1.1rem;
  border: 3px solid var(--c-white);
  letter-spacing: 1px;
  font-weight: 400;
}

.btn-primary:hover {
  background: var(--c-white);
  color: var(--c-black);
}

.btn-outline {
  display: inline-flex;
  align-items: center;
  height: 52px;
  padding: 0 32px;
  background: transparent;
  color: var(--c-white);
  font-family: var(--font-display);
  font-size: 1.1rem;
  border: 3px solid var(--c-white);
  letter-spacing: 1px;
}

.btn-outline:hover {
  background: var(--c-white);
  color: var(--c-black);
}

/* ===== 通用标签 ===== */
.section-badge {
  display: inline-block;
  background: var(--c-blue);
  color: var(--c-white);
  font-family: var(--font-body);
  font-size: 0.78rem;
  font-weight: 700;
  padding: 3px 10px;
  letter-spacing: 2px;
  text-transform: uppercase;
  border: 2px solid var(--c-white);
}

.section-header {
  display: flex;
  align-items: baseline;
  gap: 16px;
  margin-bottom: 24px;
  border-bottom: 3px solid var(--c-green);
  padding-bottom: 12px;
}

.section-badge-row {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 20px;
}

.section-h2 {
  font-family: var(--font-display);
  font-size: 1.8rem;
  color: var(--c-white);
  letter-spacing: 1px;
}

/* ===== 正文排版 ===== */
.prose-content {
  max-width: var(--max-prose);
  font-size: 1rem;
  line-height: 1.75;
  color: #e0e0e0;
}

.prose-content h2 {
  font-family: var(--font-display);
  font-size: 1.6rem;
  color: var(--c-green);
  margin: 2rem 0 0.8rem;
  letter-spacing: 1px;
  border-left: 5px solid var(--c-blue);
  padding-left: 12px;
}

.prose-content h3 {
  font-family: var(--font-display);
  font-size: 1.2rem;
  color: var(--c-white);
  margin: 1.6rem 0 0.6rem;
  letter-spacing: 0.5px;
}

.prose-content p {
  margin-bottom: 1rem;
}

.prose-content ul,
.prose-content ol {
  padding-left: 1.4rem;
  margin-bottom: 1rem;
}

.prose-content li {
  margin-bottom: 0.4rem;
}

.prose-content a {
  color: var(--c-green);
  border-bottom: 1px solid var(--c-green);
}

.prose-content a:hover {
  color: var(--c-black);
  background: var(--c-green);
  border-color: var(--c-green);
}

.prose-content strong {
  color: var(--c-white);
  font-weight: 700;
}

.prose-content blockquote {
  border-left: 4px solid var(--c-green);
  padding: 8px 16px;
  margin: 1.2rem 0;
  background: var(--c-gray2);
  color: #ccc;
}

.prose-content table {
  width: 100%;
  border-collapse: collapse;
  margin: 1.2rem 0;
  font-size: 0.95rem;
}

.prose-content th {
  background: var(--c-blue);
  color: var(--c-white);
  padding: 8px 12px;
  text-align: left;
  font-weight: 700;
  border: 1px solid #333;
}

.prose-content td {
  padding: 8px 12px;
  border: 1px solid #333;
  color: #ddd;
}

.prose-content tr:nth-child(even) td {
  background: var(--c-gray2);
}

/* ===== 首页 Hero ===== */
.page-home .home-body {
  flex: 1;
}

.hero-section {
  min-height: 70vh;
  display: flex;
  align-items: flex-end;
  padding: 80px 24px 60px;
  background: var(--c-black);
  border-bottom: 4px solid var(--c-green);
  position: relative;
}

.hero-section::before {
  content: '';
  position: absolute;
  top: 0;
  right: 0;
  width: 40%;
  height: 100%;
  background: repeating-linear-gradient(
    90deg,
    transparent,
    transparent 28px,
    rgba(0,255,128,0.04) 28px,
    rgba(0,255,128,0.04) 30px
  );
  pointer-events: none;
}

.hero-inner {
  max-width: var(--max-w);
  width: 100%;
  margin: 0 auto;
}

.hero-h1 {
  font-family: var(--font-display);
  font-size: clamp(3rem, 10vw, 7rem);
  line-height: 1;
  color: var(--c-white);
  letter-spacing: -2px;
  margin-bottom: 24px;
  max-width: 14ch;
}

.hero-sub {
  font-size: clamp(1rem, 2.5vw, 1.3rem);
  color: #bbb;
  max-width: 60ch;
  margin-bottom: 36px;
  line-height: 1.6;
}

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

/* ===== 首页内容区 ===== */
.content-section,
.topics-section,
.recent-section {
  padding: 60px 24px;
  max-width: var(--max-w);
  margin: 0 auto;
  width: 100%;
}

.topics-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 0;
  border: 3px solid var(--c-green);
}

.topic-block {
  border-right: 2px solid var(--c-green);
  border-bottom: 2px solid var(--c-green);
}

.topic-block:nth-child(even) {
  background: var(--c-gray2);
}

.topic-link {
  display: flex;
  flex-direction: column;
  padding: 24px;
  gap: 8px;
  color: var(--c-white);
  height: 100%;
  text-decoration: none;
}

.topic-link:hover {
  background: var(--c-blue);
  color: var(--c-white);
}

.topic-label {
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--c-green);
  letter-spacing: 2px;
  text-transform: uppercase;
}

.topic-link:hover .topic-label {
  color: var(--c-white);
}

.topic-title {
  font-family: var(--font-display);
  font-size: 1.4rem;
  color: var(--c-white);
  line-height: 1.2;
}

.topic-desc {
  font-size: 0.9rem;
  color: #aaa;
  line-height: 1.5;
  flex: 1;
}

.topic-link:hover .topic-desc {
  color: #ddd;
}

.topic-arrow {
  font-size: 1.5rem;
  color: var(--c-green);
  margin-top: 8px;
  align-self: flex-end;
}

/* ===== 卡片列表 (dl > dt/dd) ===== */
.card-list {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 16px;
}

.card-list dt {
  background: rgba(0,255,128,0.05);
  border: 2px solid rgba(0,255,128,0.3);
  padding: 16px 20px 0;
  border-radius: 28px;
  font-size: 1rem;
}

.card-list dt + dd {
  background: rgba(0,255,128,0.05);
  border: 2px solid rgba(0,255,128,0.3);
  border-top: none;
  padding: 0 20px 16px;
  border-radius: 0 0 28px 28px;
  margin-bottom: 0;
}

.card-list dt a {
  font-family: var(--font-body);
  font-size: 1rem;
  font-weight: 700;
  color: var(--c-white);
  display: block;
  padding-bottom: 8px;
  text-decoration: none;
  border-bottom: 2px solid rgba(0,255,128,0.2);
}

.card-list dt a:hover {
  color: var(--c-green);
  background: transparent;
}

.card-list .card-desc {
  font-size: 0.875rem;
  color: #999;
  line-height: 1.5;
  margin-top: 8px;
  display: block;
}

.card-list .card-date {
  display: block;
  font-size: 0.78rem;
  color: #666;
  margin-top: 4px;
}

/* ===== Topic 页面 ===== */
.page-topic .topic-body {
  flex: 1;
}

.topic-hero {
  padding: 48px 24px 40px;
  max-width: var(--max-w);
  margin: 0 auto;
  border-bottom: 3px solid var(--c-green);
}

.topic-h1 {
  font-family: var(--font-display);
  font-size: clamp(2.2rem, 6vw, 4.5rem);
  color: var(--c-white);
  line-height: 1.05;
  letter-spacing: -1px;
  margin-bottom: 16px;
}

.topic-lead {
  font-size: 1.05rem;
  color: #bbb;
  max-width: 60ch;
  line-height: 1.65;
}

.topic-content-section,
.topic-children-section {
  padding: 48px 24px;
  max-width: var(--max-w);
  margin: 0 auto;
  width: 100%;
}

.topic-children-section {
  border-top: 3px solid var(--c-green);
}

.child-count {
  font-size: 0.85rem;
  color: #888;
  font-family: var(--font-body);
  font-weight: 700;
}

.child-list {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0;
}

.child-item {
  border: 2px solid var(--c-gray3);
  border-top: none;
  list-style: none;
}

.child-item:first-child {
  border-top: 2px solid var(--c-gray3);
}

.child-link {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 20px;
  color: var(--c-white);
  text-decoration: none;
}

.child-link:hover {
  background: var(--c-blue);
  color: var(--c-white);
}

.child-thumb {
  width: 80px;
  height: 56px;
  flex-shrink: 0;
  overflow: hidden;
  border: 2px solid #333;
}

.child-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.child-info {
  display: flex;
  flex-direction: column;
  gap: 4px;
  flex: 1;
  min-width: 0;
}

.child-title {
  font-family: var(--font-body);
  font-size: 1rem;
  font-weight: 700;
  color: var(--c-white);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.child-desc {
  font-size: 0.875rem;
  color: #999;
  line-height: 1.4;
  overflow: hidden;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
}

.child-link:hover .child-desc {
  color: #ddd;
}

.child-date {
  font-size: 0.78rem;
  color: #666;
}

.child-sep {
  display: none;
}

.child-empty {
  padding: 20px;
  color: #555;
  font-style: italic;
  list-style: none;
  border: 2px solid var(--c-gray3);
}

/* ===== Article 页面 ===== */
.page-article .article-body {
  flex: 1;
}

.article-header {
  padding: 48px 24px 40px;
  max-width: var(--max-w);
  margin: 0 auto;
  border-bottom: 3px solid var(--c-green);
}

.article-h1 {
  font-family: var(--font-display);
  font-size: clamp(2rem, 5vw, 3.8rem);
  color: var(--c-white);
  line-height: 1.1;
  letter-spacing: -1px;
  margin-bottom: 16px;
}

.article-meta {
  display: flex;
  gap: 20px;
  flex-wrap: wrap;
  margin-bottom: 20px;
}

.pub-date,
.mod-date {
  display: inline-block;
  font-size: 0.85rem;
  color: #888;
  background: var(--c-gray2);
  padding: 4px 10px;
  border: 1px solid #333;
}

.article-hero-wrap {
  margin-top: 20px;
  border: 3px solid var(--c-green);
}

.article-hero-img {
  width: 100%;
  max-height: 400px;
  object-fit: cover;
}

.article-layout {
  display: grid;
  grid-template-columns: 1fr 300px;
  gap: 0;
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 24px;
}

.article-main {
  padding: 48px 40px 48px 0;
  border-right: 2px solid var(--c-gray3);
}

.related-aside {
  padding: 48px 0 48px 32px;
}

.aside-title {
  font-family: var(--font-display);
  font-size: 1rem;
  color: var(--c-green);
  letter-spacing: 2px;
  text-transform: uppercase;
  margin-bottom: 20px;
  padding-bottom: 8px;
  border-bottom: 2px solid var(--c-green);
}

.related-list {
  display: flex;
  flex-direction: column;
  gap: 0;
}

.related-list dt {
  border: 1px solid #333;
  border-bottom: none;
  padding: 12px 14px 4px;
}

.related-list dt:first-child {
  border-top: 2px solid var(--c-blue);
}

.related-list dd {
  border: 1px solid #333;
  border-top: none;
  border-bottom: none;
  padding: 0 14px 12px;
  margin: 0;
  font-size: 0.82rem;
  color: #777;
  line-height: 1.4;
}

.related-list dd + dt {
  border-top: 1px solid #333;
}

.related-list:last-child dd:last-of-type {
  border-bottom: 1px solid #333;
}

.related-list dt a {
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--c-white);
  display: block;
  line-height: 1.4;
  text-decoration: none;
}

.related-list dt a:hover {
  color: var(--c-green);
  background: transparent;
}

/* ===== About 页面 ===== */
.page-about .about-body {
  flex: 1;
}

.about-hero {
  padding: 48px 24px 40px;
  max-width: var(--max-w);
  margin: 0 auto;
  border-bottom: 3px solid var(--c-green);
}

.about-h1 {
  font-family: var(--font-display);
  font-size: clamp(2.5rem, 7vw, 5rem);
  color: var(--c-white);
  line-height: 1.05;
  letter-spacing: -1px;
  margin-bottom: 16px;
}

.about-lead {
  font-size: 1.1rem;
  color: #bbb;
  max-width: 60ch;
  line-height: 1.65;
}

.about-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  border: 3px solid var(--c-green);
  max-width: var(--max-w);
  margin: 0 auto;
}

.stat-block {
  padding: 32px 24px;
  border-right: 2px solid var(--c-green);
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.stat-block:last-child {
  border-right: none;
}

.stat-num {
  font-family: var(--font-display);
  font-size: 3rem;
  color: var(--c-green);
  line-height: 1;
}

.stat-label {
  font-size: 0.875rem;
  color: #888;
  font-weight: 600;
}

.about-content-section {
  padding: 48px 24px;
  max-width: var(--max-w);
  margin: 0 auto;
  width: 100%;
}

.about-links {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0;
  max-width: var(--max-w);
  margin: 0 auto;
  border: 3px solid var(--c-blue);
  margin-bottom: 60px;
}

.about-link-block {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 28px 24px;
  border-right: 2px solid var(--c-blue);
  color: var(--c-white);
  text-decoration: none;
}

.about-link-block:last-child {
  border-right: none;
}

.about-link-block:hover {
  background: var(--c-blue);
  color: var(--c-white);
}

.link-label {
  font-family: var(--font-display);
  font-size: 1.3rem;
  color: var(--c-green);
}

.about-link-block:hover .link-label {
  color: var(--c-white);
}

.link-desc {
  font-size: 0.875rem;
  color: #999;
  line-height: 1.5;
}

.about-link-block:hover .link-desc {
  color: #ddd;
}

/* ===== Privacy 页面 ===== */
.page-privacy .privacy-body {
  flex: 1;
}

.privacy-header {
  padding: 48px 24px 40px;
  max-width: var(--max-w);
  margin: 0 auto;
  border-bottom: 3px solid var(--c-green);
}

.privacy-h1 {
  font-family: var(--font-display);
  font-size: clamp(2rem, 5vw, 3.5rem);
  color: var(--c-white);
  line-height: 1.1;
  letter-spacing: -1px;
  margin-bottom: 12px;
}

.privacy-date {
  font-size: 0.85rem;
  color: #888;
  padding: 4px 0;
}

.privacy-date time {
  background: var(--c-gray2);
  padding: 4px 10px;
  border: 1px solid #333;
  display: inline-block;
}

.privacy-content-section {
  padding: 48px 24px;
  max-width: var(--max-w);
  margin: 0 auto;
  width: 100%;
}

.privacy-footer-links {
  display: flex;
  gap: 0;
  max-width: var(--max-w);
  margin: 0 auto 60px;
  padding: 0 24px;
  border-top: 2px solid var(--c-gray3);
  padding-top: 24px;
}

.privacy-footer-links a {
  display: inline-flex;
  align-items: center;
  height: 44px;
  padding: 0 20px;
  border: 2px solid var(--c-gray3);
  color: var(--c-white);
  font-size: 0.9rem;
  font-weight: 600;
  margin-right: 12px;
  text-decoration: none;
}

.privacy-footer-links a:hover {
  background: var(--c-green);
  color: var(--c-black);
  border-color: var(--c-green);
}

/* ===== 页脚 ===== */
.site-footer {
  background: var(--c-gray);
  border-top: 4px solid var(--c-green);
  margin-top: auto;
}

.footer-top {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 24px;
  padding: 32px 24px 24px;
  max-width: var(--max-w);
  margin: 0 auto;
  border-bottom: 2px solid #222;
  flex-wrap: wrap;
}

.footer-brand {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.footer-brand strong {
  font-family: var(--font-display);
  font-size: 1.4rem;
  color: var(--c-green);
}

.footer-brand span {
  font-size: 0.85rem;
  color: #888;
  max-width: 40ch;
}

.footer-contact {
  display: flex;
  flex-direction: column;
  gap: 6px;
  text-align: right;
}

.footer-label {
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--c-green);
  letter-spacing: 2px;
  text-transform: uppercase;
}

.footer-note {
  font-size: 0.82rem;
  color: #666;
  max-width: 40ch;
}

.footer-nav {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 24px 24px;
  border-bottom: 2px solid #222;
}

.footer-nav dl {
  display: flex;
  flex-wrap: wrap;
  gap: 4px 0;
  align-items: center;
}

.footer-nav-title {
  font-size: 0.78rem;
  font-weight: 700;
  color: #555;
  letter-spacing: 2px;
  text-transform: uppercase;
  margin-right: 12px;
  flex-shrink: 0;
}

.footer-nav dd {
  margin: 0;
}

.footer-nav dd a {
  display: inline-flex;
  align-items: center;
  height: 40px;
  padding: 0 14px;
  color: #aaa;
  font-size: 0.875rem;
  border-right: 1px solid #333;
  text-decoration: none;
}

.footer-nav dd a:hover {
  color: var(--c-green);
  background: transparent;
}

.footer-bar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 16px 24px;
  max-width: var(--max-w);
  margin: 0 auto;
  flex-wrap: wrap;
  gap: 12px;
}

.footer-bar span {
  font-size: 0.82rem;
  color: #555;
}

.footer-links {
  display: flex;
  gap: 16px;
}

.footer-links a {
  font-size: 0.82rem;
  color: #666;
  text-decoration: none;
  height: 40px;
  display: inline-flex;
  align-items: center;
  padding: 0 8px;
}

.footer-links a:hover {
  color: var(--c-green);
  background: transparent;
}

/* ===== Scroll Reveal 动效 ===== */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.4s ease, transform 0.4s ease;
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

@media (prefers-reduced-motion: reduce) {
  .reveal {
    opacity: 1;
    transform: none;
    transition: none;
  }
  html {
    scroll-behavior: auto;
  }
}

/* ===== 响应式 ===== */
@media (max-width: 900px) {
  .article-layout {
    grid-template-columns: 1fr;
  }

  .article-main {
    padding: 40px 0 0;
    border-right: none;
    border-bottom: 3px solid var(--c-gray3);
  }

  .related-aside {
    padding: 32px 0 40px;
  }

  .about-stats {
    grid-template-columns: repeat(2, 1fr);
  }

  .stat-block:nth-child(2) {
    border-right: none;
  }

  .stat-block:nth-child(3) {
    border-top: 2px solid var(--c-green);
  }

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

  .about-link-block {
    border-right: none;
    border-bottom: 2px solid var(--c-blue);
  }

  .about-link-block:last-child {
    border-bottom: none;
  }
}

@media (max-width: 768px) {
  :root {
    --nav-h: 56px;
  }

  .nav-pills {
    display: none;
  }

  .hero-section {
    min-height: 70vh;
    padding: 60px 16px 40px;
  }

  .hero-h1 {
    font-size: clamp(2.5rem, 12vw, 4rem);
  }

  .hero-sub {
    font-size: 1rem;
  }

  .content-section,
  .topics-section,
  .recent-section {
    padding: 40px 16px;
  }

  .topics-grid {
    grid-template-columns: 1fr;
  }

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

  .topic-hero,
  .article-header,
  .about-hero,
  .privacy-header {
    padding: 32px 16px 28px;
  }

  .topic-content-section,
  .topic-children-section,
  .about-content-section,
  .privacy-content-section {
    padding: 32px 16px;
  }

  .article-layout {
    padding: 0 16px;
  }

  .about-stats {
    grid-template-columns: repeat(2, 1fr);
    margin: 0 16px;
  }

  .about-links {
    margin: 0 16px 40px;
  }

  .footer-top {
    flex-direction: column;
    padding: 24px 16px;
  }

  .footer-contact {
    text-align: left;
  }

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

  .footer-nav {
    padding: 16px;
  }

  .footer-nav dl {
    flex-wrap: wrap;
  }

  .section-h2 {
    font-size: 1.4rem;
  }

  .child-link {
    padding: 16px;
  }

  .child-thumb {
    width: 64px;
    height: 44px;
  }

  .privacy-footer-links {
    padding: 24px 16px;
    flex-wrap: wrap;
  }
}

@media (max-width: 480px) {
  .hero-h1 {
    font-size: clamp(2rem, 14vw, 3rem);
    letter-spacing: -1px;
  }

  .btn-primary,
  .btn-outline {
    height: 48px;
    padding: 0 24px;
    font-size: 1rem;
  }

  .about-stats {
    grid-template-columns: repeat(2, 1fr);
  }

  .stat-num {
    font-size: 2.2rem;
  }

  .nav-cta {
    padding: 0 12px;
    font-size: 0.82rem;
  }

  .topic-link {
    padding: 18px;
  }
}