@import url('https://fonts.googleapis.com/css2?family=Press+Start+2P&family=VT323&display=swap');

/* ===========================
   CSS 变量 & 重置
=========================== */
:root {
  --c-bg: #1c1726;
  --c-primary: #6514ff;
  --c-accent: #bf00ff;
  --c-text: #e8d8ff;
  --c-text-dim: #a08abf;
  --c-surface: #261e38;
  --c-surface2: #2e2445;
  --c-border: #3d2e66;
  --c-neon: #ff00cc;
  --c-white: #ffffff;
  --font-px: 'Press Start 2P', monospace;
  --font-vt: 'VT323', monospace;
  --font-sys: var(--font-vt), 'Courier New', monospace;
  --radius: 10px;
  --gap-lg: 48px;
  --gap-md: 32px;
  --gap-sm: 16px;
  --max-w: 1200px;
  --aside-w: 240px;
  --trans: 200ms ease;
}

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

html {
  font-size: 18px;
  scroll-behavior: smooth;
}

body {
  background-color: var(--c-bg);
  color: var(--c-text);
  font-family: var(--font-sys);
  font-size: 18px;
  line-height: 1.7;
  min-height: 100vh;
  overflow-x: hidden;
}

/* 霓虹扫描线背景纹理 */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  background:
    repeating-linear-gradient(
      0deg,
      transparent,
      transparent 3px,
      rgba(101, 20, 255, 0.03) 3px,
      rgba(101, 20, 255, 0.03) 4px
    );
  pointer-events: none;
  z-index: 0;
  animation: scanline 8s linear infinite;
}

@keyframes scanline {
  0% { background-position: 0 0; }
  100% { background-position: 0 100vh; }
}

@media (prefers-reduced-motion: reduce) {
  body::before { animation: none; }
  * { animation-duration: 0.01ms !important; transition-duration: 0.01ms !important; }
}

a { color: var(--c-accent); text-decoration: none; transition: color var(--trans); }
a:hover, a:focus { color: var(--c-neon); }
a:focus-visible { outline: 2px solid var(--c-accent); outline-offset: 3px; }

img { max-width: 100%; height: auto; display: block; }
ul { list-style: none; }

/* ===========================
   布局骨架
=========================== */
.site-wrapper {
  display: flex;
  min-height: 100vh;
  position: relative;
  z-index: 1;
}

/* 侧边 aside（左侧） */
.site-aside {
  width: var(--aside-w);
  min-width: var(--aside-w);
  background: var(--c-surface);
  border-right: 2px solid var(--c-primary);
  position: sticky;
  top: 0;
  height: 100vh;
  overflow-y: auto;
  overflow-x: hidden;
  padding: 24px 0;
  display: flex;
  flex-direction: column;
  gap: 32px;
  z-index: 100;
  scrollbar-width: thin;
  scrollbar-color: var(--c-primary) var(--c-surface);
}

.site-aside nav ul {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.site-aside nav ul li a {
  display: block;
  padding: 10px 20px;
  font-family: var(--font-vt);
  font-size: 18px;
  color: var(--c-text-dim);
  border-left: 3px solid transparent;
  transition: all var(--trans);
  line-height: 1.4;
}

.site-aside nav ul li a:hover,
.site-aside nav ul li a:focus {
  color: var(--c-accent);
  border-left-color: var(--c-accent);
  background: rgba(101, 20, 255, 0.15);
}

.aside-related {
  padding: 0 20px;
}

.aside-related__title {
  font-family: var(--font-px);
  font-size: 8px;
  color: var(--c-primary);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 12px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--c-border);
}

.aside-related ul {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.aside-related ul li a {
  display: block;
  padding: 8px 0;
  font-family: var(--font-vt);
  font-size: 17px;
  color: var(--c-text-dim);
  transition: color var(--trans);
}

.aside-related ul li a:hover { color: var(--c-accent); }

/* 主内容区 */
.page-body {
  flex: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
}

/* ===========================
   顶部 Header（两行）
=========================== */
.site-header {
  background: var(--c-surface);
  border-bottom: 2px solid var(--c-primary);
  position: sticky;
  top: 0;
  z-index: 200;
}

.header-brand-row {
  display: flex;
  align-items: center;
  gap: 20px;
  padding: 16px 32px;
  background: linear-gradient(90deg, var(--c-primary) 0%, var(--c-accent) 100%);
}

.brand-logo {
  font-family: var(--font-px);
  font-size: 16px;
  color: var(--c-white) !important;
  letter-spacing: 0.05em;
  white-space: nowrap;
  text-shadow: 0 0 10px rgba(255,255,255,0.5);
}

.brand-logo:hover { color: var(--c-white) !important; text-shadow: 0 0 20px #fff; }

.brand-tagline {
  font-family: var(--font-vt);
  font-size: 18px;
  color: rgba(255,255,255,0.8);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.header-nav-row {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 10px 32px;
  overflow-x: auto;
  scrollbar-width: none;
}

.header-nav-row::-webkit-scrollbar { display: none; }

/* 药丸胶囊按钮组 */
.pill-nav ul {
  display: flex;
  flex-wrap: nowrap;
  gap: 8px;
  align-items: center;
}

.pill-nav ul li a {
  display: block;
  padding: 8px 18px;
  min-height: 40px;
  line-height: 24px;
  background: var(--c-surface2);
  border: 1.5px solid var(--c-border);
  border-radius: 9999px;
  font-family: var(--font-vt);
  font-size: 17px;
  color: var(--c-text);
  white-space: nowrap;
  transition: all var(--trans);
}

.pill-nav ul li a:hover,
.pill-nav ul li a:focus {
  background: var(--c-primary);
  border-color: var(--c-primary);
  color: var(--c-white);
  box-shadow: 0 0 12px rgba(101, 20, 255, 0.6);
}

/* 搜索框 */
.header-search {
  display: flex;
  align-items: center;
  gap: 0;
  margin-left: auto;
  flex-shrink: 0;
}

.header-search input {
  padding: 8px 16px;
  min-height: 40px;
  background: var(--c-surface2);
  border: 1.5px solid var(--c-border);
  border-right: none;
  border-radius: var(--radius) 0 0 var(--radius);
  font-family: var(--font-vt);
  font-size: 18px;
  color: var(--c-text);
  width: 180px;
  transition: border-color var(--trans);
}

.header-search input::placeholder { color: var(--c-text-dim); }
.header-search input:focus { outline: none; border-color: var(--c-accent); }

.header-search button {
  padding: 8px 16px;
  min-height: 40px;
  background: var(--c-primary);
  border: 1.5px solid var(--c-primary);
  border-radius: 0 var(--radius) var(--radius) 0;
  font-family: var(--font-px);
  font-size: 10px;
  color: var(--c-white);
  cursor: pointer;
  transition: background var(--trans);
}

.header-search button:hover { background: var(--c-accent); border-color: var(--c-accent); }

/* ===========================
   Hero — 首页
=========================== */
.hero {
  min-height: 45vh;
  background: linear-gradient(135deg, #0d0b1a 0%, var(--c-surface) 40%, #2a0d4f 100%);
  position: relative;
  display: flex;
  align-items: center;
  overflow: hidden;
}

/* 动态几何背景 */
.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 20% 50%, rgba(101,20,255,0.3) 0%, transparent 50%),
    radial-gradient(circle at 80% 30%, rgba(191,0,255,0.2) 0%, transparent 40%);
  animation: heroPulse 6s ease-in-out infinite alternate;
}

@keyframes heroPulse {
  from { opacity: 0.6; }
  to { opacity: 1; }
}

.hero__inner {
  position: relative;
  z-index: 2;
  text-align: center;
  width: 100%;
  padding: var(--gap-lg) 48px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--gap-sm);
}

.hero__eyebrow {
  font-family: var(--font-px);
  font-size: 10px;
  color: var(--c-accent);
  letter-spacing: 0.2em;
  text-transform: uppercase;
}

.hero__title {
  font-family: var(--font-px);
  font-size: clamp(22px, 4vw, 40px);
  color: var(--c-white);
  line-height: 1.6;
  text-shadow: 0 0 30px var(--c-accent), 0 0 60px var(--c-primary);
  max-width: 900px;
}

.hero__sub {
  font-family: var(--font-vt);
  font-size: 22px;
  color: var(--c-text-dim);
  max-width: 600px;
}

.hero__cta {
  display: inline-block;
  margin-top: 8px;
  padding: 14px 36px;
  min-height: 48px;
  background: var(--c-primary);
  border: 2px solid var(--c-accent);
  border-radius: var(--radius);
  font-family: var(--font-px);
  font-size: 11px;
  color: var(--c-white) !important;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  transition: all var(--trans);
  box-shadow: 0 0 20px rgba(101,20,255,0.5);
}

.hero__cta:hover {
  background: var(--c-accent);
  box-shadow: 0 0 40px rgba(191,0,255,0.8);
  transform: translateY(-2px);
}

/* 斜切色带 */
.hero__slash {
  position: absolute;
  bottom: -2px;
  left: 0;
  right: 0;
  height: 48px;
  background: var(--c-bg);
  clip-path: polygon(0 100%, 100% 0, 100% 100%);
  z-index: 3;
}

/* ===========================
   Hero — 专题页
=========================== */
.topic-hero {
  min-height: 200px;
  background: linear-gradient(135deg, var(--c-surface) 0%, #2a0d4f 100%);
  position: relative;
  display: flex;
  align-items: center;
  overflow: hidden;
  border-bottom: 2px solid var(--c-primary);
}

.topic-hero__inner {
  position: relative;
  z-index: 2;
  padding: 40px 48px;
}

.topic-hero__label {
  font-family: var(--font-px);
  font-size: 8px;
  color: var(--c-accent);
  letter-spacing: 0.2em;
  margin-bottom: 12px;
}

.topic-hero__title {
  font-family: var(--font-px);
  font-size: clamp(16px, 3vw, 28px);
  color: var(--c-white);
  line-height: 1.7;
  text-shadow: 0 0 20px var(--c-primary);
}

.topic-hero__desc {
  font-family: var(--font-vt);
  font-size: 20px;
  color: var(--c-text-dim);
  margin-top: 12px;
  max-width: 700px;
}

.topic-hero__slash {
  position: absolute;
  right: 0;
  top: 0;
  bottom: 0;
  width: 80px;
  background: var(--c-primary);
  clip-path: polygon(40px 0, 100% 0, 100% 100%, 0 100%);
  opacity: 0.3;
}

/* ===========================
   Hero — 内页（about/privacy）
=========================== */
.inner-hero {
  min-height: 160px;
  background: linear-gradient(90deg, var(--c-surface) 60%, var(--c-primary) 100%);
  position: relative;
  display: flex;
  align-items: center;
  overflow: hidden;
  border-bottom: 2px solid var(--c-border);
}

.inner-hero__inner {
  position: relative;
  z-index: 2;
  padding: 32px 48px;
}

.inner-hero__label {
  font-family: var(--font-px);
  font-size: 8px;
  color: var(--c-accent);
  letter-spacing: 0.2em;
  margin-bottom: 10px;
}

.inner-hero__title {
  font-family: var(--font-px);
  font-size: clamp(14px, 2.5vw, 24px);
  color: var(--c-white);
  line-height: 1.7;
}

.inner-hero__slash {
  position: absolute;
  right: -20px;
  top: 0;
  width: 200px;
  height: 100%;
  background: var(--c-accent);
  clip-path: polygon(60px 0, 100% 0, 100% 100%, 0 100%);
  opacity: 0.1;
}

/* ===========================
   面包屑
=========================== */
.breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 14px 48px;
  font-family: var(--font-vt);
  font-size: 18px;
  color: var(--c-text-dim);
  background: var(--c-surface);
  border-bottom: 1px solid var(--c-border);
  flex-wrap: wrap;
}

.breadcrumb a { color: var(--c-text-dim); }
.breadcrumb a:hover { color: var(--c-accent); }
.breadcrumb span[aria-hidden] { color: var(--c-primary); }

/* ===========================
   主内容
=========================== */
.site-main {
  flex: 1;
  padding-bottom: var(--gap-lg);
}

.wrap {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: var(--gap-lg) 48px;
  display: flex;
  flex-direction: column;
  gap: var(--gap-lg);
}

/* ===========================
   Section 标题
=========================== */
.section-title {
  font-family: var(--font-px);
  font-size: clamp(12px, 2vw, 18px);
  color: var(--c-white);
  line-height: 1.8;
  margin-bottom: 12px;
}

hr {
  border: none;
  border-top: 2px solid var(--c-primary);
  margin: 0 0 var(--gap-md) 0;
  box-shadow: 0 0 8px rgba(101,20,255,0.5);
}

/* ===========================
   卡片
=========================== */
.card {
  background: var(--c-surface2);
  border-radius: var(--radius);
  padding: 28px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  transition: transform var(--trans), box-shadow var(--trans);
  position: relative;
  overflow: hidden;
}

.card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 4px;
  height: 100%;
  background: linear-gradient(180deg, var(--c-primary), var(--c-accent));
  border-radius: var(--radius) 0 0 var(--radius);
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 32px rgba(101,20,255,0.4);
}

.card__eyebrow {
  font-family: var(--font-px);
  font-size: 7px;
  color: var(--c-accent);
  letter-spacing: 0.15em;
  text-transform: uppercase;
}

.card__title {
  font-family: var(--font-px);
  font-size: clamp(10px, 1.5vw, 14px);
  line-height: 1.8;
}

.card__title a {
  color: var(--c-white);
}

.card__title a:hover { color: var(--c-accent); }

.card__desc {
  font-family: var(--font-vt);
  font-size: 19px;
  color: var(--c-text-dim);
  line-height: 1.5;
}

.card__meta {
  font-family: var(--font-px);
  font-size: 7px;
  color: var(--c-primary);
}

.card__footer {
  font-family: var(--font-vt);
  font-size: 17px;
  color: var(--c-text-dim);
}

.card__footer time { color: var(--c-accent); }

/* 首页专题网格 */
.topics-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: var(--gap-md);
}

/* 首页文章网格 */
.articles-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: var(--gap-md);
}

/* 子页卡片列表（section > article 结构）*/
.children-section {
  display: flex;
  flex-direction: column;
}

.children-section > article.card--child {
  /* 直接作为 section 的子元素 */
}

/* 正文区段 */
.home-content-section,
.topic-content-section,
.article-section,
.about-section,
.privacy-section,
.about-links-section {
  display: flex;
  flex-direction: column;
  gap: 0;
}

.home-content-article,
.topic-content-article,
.article-body,
.about-article,
.about-links-article,
.privacy-article {
  background: var(--c-surface);
  border-radius: var(--radius);
  padding: 40px;
  border: 1px solid var(--c-border);
}

/* ===========================
   正文排版
=========================== */
.content-prose {
  font-family: var(--font-vt);
  font-size: 20px;
  line-height: 1.8;
  color: var(--c-text);
}

.content-prose h2 {
  font-family: var(--font-px);
  font-size: clamp(12px, 2vw, 16px);
  color: var(--c-white);
  margin: 40px 0 8px;
  line-height: 1.8;
}

.content-prose h2 + hr,
.content-prose h3 + hr {
  border-top-color: var(--c-primary);
  margin: 0 0 20px 0;
}

.content-prose h3 {
  font-family: var(--font-px);
  font-size: clamp(10px, 1.5vw, 13px);
  color: var(--c-accent);
  margin: 32px 0 8px;
  line-height: 1.8;
}

.content-prose p {
  margin: 0 0 20px;
}

.content-prose ul,
.content-prose ol {
  padding-left: 24px;
  margin: 0 0 20px;
}

.content-prose ul { list-style: disc; }
.content-prose ol { list-style: decimal; }

.content-prose li {
  margin-bottom: 8px;
}

.content-prose a {
  color: var(--c-accent);
  text-decoration: underline;
  text-decoration-color: rgba(191,0,255,0.4);
}

.content-prose a:hover { color: var(--c-neon); text-decoration-color: var(--c-neon); }

.content-prose strong {
  color: var(--c-white);
  font-family: var(--font-px);
  font-size: 0.8em;
}

.content-prose code {
  background: rgba(101,20,255,0.2);
  border: 1px solid var(--c-border);
  border-radius: 4px;
  padding: 2px 8px;
  font-family: 'Courier New', monospace;
  font-size: 0.85em;
  color: var(--c-accent);
}

.content-prose pre {
  background: var(--c-surface2);
  border: 1px solid var(--c-border);
  border-radius: var(--radius);
  padding: 20px;
  overflow-x: auto;
  margin: 0 0 20px;
}

.content-prose blockquote {
  border-left: 4px solid var(--c-primary);
  padding-left: 20px;
  margin: 0 0 20px;
  color: var(--c-text-dim);
  font-style: italic;
}

.content-prose table {
  width: 100%;
  border-collapse: collapse;
  margin: 0 0 20px;
  font-size: 18px;
}

.content-prose th {
  background: var(--c-primary);
  color: var(--c-white);
  font-family: var(--font-px);
  font-size: 9px;
  padding: 12px 16px;
  text-align: left;
}

.content-prose td {
  padding: 10px 16px;
  border-bottom: 1px solid var(--c-border);
}

.content-prose tr:hover td { background: rgba(101,20,255,0.1); }

/* ===========================
   文章专属
=========================== */
.article-header {
  margin-bottom: 32px;
}

.article-title {
  font-family: var(--font-px);
  font-size: clamp(13px, 2.5vw, 22px);
  color: var(--c-white);
  line-height: 1.8;
  text-shadow: 0 0 20px rgba(101,20,255,0.5);
  margin-bottom: 16px;
}

.article-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  font-family: var(--font-vt);
  font-size: 18px;
  color: var(--c-text-dim);
  flex-wrap: wrap;
}

.article-meta__label { color: var(--c-primary); }
.article-meta time { color: var(--c-accent); }
.article-meta__sep { color: var(--c-border); }

.article-hero-wrap {
  margin-bottom: 32px;
  border-radius: var(--radius);
  overflow: hidden;
}

.article-hero-img {
  width: 100%;
  object-fit: cover;
  border-radius: var(--radius);
}

/* ===========================
   关于页 / 站点地图
=========================== */
.about-sitemap {
  display: flex;
  flex-direction: column;
  gap: 16px;
  list-style: none;
  padding: 0;
}

.about-sitemap li {
  padding: 16px 20px;
  background: var(--c-surface2);
  border-radius: var(--radius);
  border-left: 3px solid var(--c-primary);
  font-family: var(--font-vt);
  font-size: 19px;
}

.about-sitemap li a {
  color: var(--c-accent);
  font-size: 19px;
}

.sitemap-desc { color: var(--c-text-dim); }

/* ===========================
   页脚（仅 p + small）
=========================== */
.site-footer {
  background: var(--c-surface);
  border-top: 2px solid var(--c-primary);
  margin-top: auto;
}

.footer-cta {
  background: linear-gradient(90deg, var(--c-primary) 0%, var(--c-accent) 100%);
  padding: 40px 48px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  flex-wrap: wrap;
}

.footer-cta__text {
  font-family: var(--font-vt);
  font-size: 22px;
  color: var(--c-white);
  margin: 0;
}

.footer-cta__btn {
  display: inline-block;
  padding: 12px 32px;
  min-height: 48px;
  background: var(--c-white);
  border-radius: var(--radius);
  font-family: var(--font-px);
  font-size: 10px;
  color: var(--c-primary) !important;
  white-space: nowrap;
  transition: all var(--trans);
  line-height: 24px;
}

.footer-cta__btn:hover {
  background: var(--c-bg);
  color: var(--c-accent) !important;
  box-shadow: 0 0 20px rgba(255,255,255,0.3);
}

.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 48px;
  gap: 16px;
  flex-wrap: wrap;
}

.footer-copy {
  font-family: var(--font-vt);
  font-size: 18px;
  color: var(--c-text-dim);
  margin: 0;
}

.footer-links {
  display: flex;
  gap: 20px;
  font-family: var(--font-vt);
  font-size: 17px;
}

.footer-links a {
  color: var(--c-text-dim);
  min-height: 40px;
  display: inline-flex;
  align-items: center;
}

.footer-links a:hover { color: var(--c-accent); }

/* ===========================
   Scroll Reveal 动效
=========================== */
.card,
.about-sitemap li {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 300ms ease, transform 300ms ease;
}

.card.revealed,
.about-sitemap li.revealed {
  opacity: 1;
  transform: none;
}

@media (prefers-reduced-motion: reduce) {
  .card, .about-sitemap li {
    opacity: 1;
    transform: none;
  }
}

/* ===========================
   移动端断点
=========================== */
@media (max-width: 900px) {
  .site-wrapper {
    flex-direction: column;
  }

  .site-aside {
    width: 100%;
    min-width: 0;
    height: auto;
    position: static;
    border-right: none;
    border-bottom: 2px solid var(--c-primary);
    flex-direction: row;
    overflow-x: auto;
    overflow-y: hidden;
    padding: 12px 0;
    gap: 0;
  }

  .site-aside nav { flex: 0 0 auto; }

  .site-aside nav ul {
    flex-direction: row;
    padding: 0 12px;
    gap: 8px;
  }

  .site-aside nav ul li a {
    border-left: none;
    border-bottom: 3px solid transparent;
    padding: 8px 14px;
    white-space: nowrap;
    font-size: 17px;
  }

  .site-aside nav ul li a:hover {
    border-left: none;
    border-bottom-color: var(--c-accent);
    background: transparent;
  }

  .aside-related {
    display: none;
  }

  .header-brand-row {
    padding: 12px 20px;
  }

  .brand-logo { font-size: 12px; }
  .brand-tagline { display: none; }

  .header-nav-row {
    padding: 8px 16px;
  }

  .pill-nav ul li a {
    padding: 8px 12px;
    font-size: 16px;
  }

  .header-search input { width: 120px; }

  .hero__title { font-size: clamp(16px, 5vw, 28px); }
  .hero__inner { padding: var(--gap-md) 24px; }

  .topic-hero__inner { padding: 28px 24px; }
  .inner-hero__inner { padding: 24px 20px; }

  .breadcrumb { padding: 12px 20px; }

  .wrap {
    padding: var(--gap-md) 20px;
    gap: var(--gap-md);
  }

  .home-content-article,
  .topic-content-article,
  .article-body,
  .about-article,
  .about-links-article,
  .privacy-article {
    padding: 24px 20px;
  }

  .topics-grid,
  .articles-grid {
    grid-template-columns: 1fr;
    gap: var(--gap-sm);
  }

  .footer-cta {
    padding: 28px 20px;
    flex-direction: column;
    align-items: flex-start;
  }

  .footer-bottom {
    padding: 16px 20px;
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
  }
}

@media (max-width: 480px) {
  html { font-size: 17px; }

  .brand-logo { font-size: 10px; }

  .hero { min-height: 45vh; }
  .hero__title { font-size: 16px; }
  .hero__eyebrow { font-size: 8px; }
  .hero__cta { font-size: 9px; padding: 12px 24px; }

  .pill-nav { display: none; }

  .header-search input { width: 140px; }

  .section-title { font-size: 11px; }

  .card { padding: 20px 16px; }
  .card__title { font-size: 10px; }

  .article-title { font-size: 13px; }

  .footer-links { flex-direction: column; gap: 8px; }
}

/* ===========================
   children-section 子页布局
   满足 section > article×n 结构
=========================== */
.children-section {
  gap: var(--gap-sm);
}

.children-section > .card--child {
  margin-bottom: 0;
}

/* ===========================
   工具
=========================== */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0,0,0,0);
  white-space: nowrap;
}