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

/* ===== 变量 ===== */
:root {
  --c-primary: #6514ff;
  --c-accent: #bf00ff;
  --c-dark: #1c1726;
  --c-dark2: #251e32;
  --c-dark3: #2f2845;
  --c-white: #ffffff;
  --c-muted: #b0a8c8;
  --c-text: #e8e2f8;
  --c-border: rgba(101, 20, 255, 0.25);
  --c-card-bg: #231d35;
  --c-announce: var(--c-primary);

  --font-head: 'Lora', Georgia, serif;
  --font-body: 'Raleway', system-ui, sans-serif;

  --r-card: 10px;
  --shadow-card: 0 4px 24px rgba(101,20,255,0.18), 0 1px 4px rgba(0,0,0,0.4);

  --max-w: 1200px;
  --max-prose: 780px;
  --gap-lg: 56px;
  --gap-md: 32px;
  --gap-sm: 16px;
  --transition: 200ms ease;
}

/* ===== Reset ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  background: var(--c-dark);
  color: var(--c-text);
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.7;
  min-height: 100vh;
  overflow-x: hidden;
}
img { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; }
ul, ol { list-style: none; }

/* ===== 公告条 ===== */
.announce-bar {
  background: var(--c-primary);
  color: var(--c-white);
  font-family: var(--font-body);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-align: center;
  padding: 7px var(--gap-sm);
  position: relative;
  z-index: 100;
}

/* ===== 站头 ===== */
.site-header {
  background: var(--c-dark2);
  border-bottom: 2px solid var(--c-border);
  position: sticky;
  top: 0;
  z-index: 90;
}
.brand-row {
  display: flex;
  align-items: center;
  gap: var(--gap-sm);
  padding: 14px calc((100% - var(--max-w)) / 2 + 24px);
  background: linear-gradient(90deg, var(--c-dark3) 0%, var(--c-dark2) 100%);
  border-bottom: 1px solid var(--c-border);
}
.brand-logo {
  display: flex;
  align-items: center;
  gap: 10px;
}
.brand-logo__img { width: 36px; height: 36px; object-fit: contain; }
.brand-logo__text {
  font-family: var(--font-head);
  font-size: 26px;
  font-weight: 700;
  background: linear-gradient(120deg, var(--c-primary), var(--c-accent));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  letter-spacing: 0.02em;
}
.brand-row__slogan {
  font-size: 13px;
  color: var(--c-muted);
  margin-left: auto;
}

/* ===== 胶囊导航 ===== */
.caps-nav {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px calc((100% - var(--max-w)) / 2 + 24px);
  overflow-x: auto;
  scrollbar-width: none;
  background: var(--c-dark2);
}
.caps-nav::-webkit-scrollbar { display: none; }
.caps-btn {
  display: inline-flex;
  align-items: center;
  padding: 8px 18px;
  min-height: 40px;
  border-radius: 999px;
  font-family: var(--font-body);
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.03em;
  color: var(--c-muted);
  background: transparent;
  border: 1.5px solid var(--c-border);
  white-space: nowrap;
  transition: background var(--transition), color var(--transition), border-color var(--transition);
  cursor: pointer;
}
.caps-btn:hover, .caps-btn:focus-visible {
  background: var(--c-primary);
  color: var(--c-white);
  border-color: var(--c-primary);
  outline: none;
}
.caps-btn--active {
  background: linear-gradient(120deg, var(--c-primary), var(--c-accent));
  color: var(--c-white);
  border-color: transparent;
}

/* ===== 按钮 ===== */
.btn-primary {
  display: inline-flex;
  align-items: center;
  padding: 13px 32px;
  min-height: 48px;
  background: linear-gradient(120deg, var(--c-primary), var(--c-accent));
  color: var(--c-white);
  font-family: var(--font-body);
  font-size: 16px;
  font-weight: 700;
  border-radius: 999px;
  transition: opacity var(--transition), transform var(--transition);
  cursor: pointer;
}
.btn-primary:hover { opacity: 0.88; transform: translateY(-2px); }

.btn-outline {
  display: inline-flex;
  align-items: center;
  padding: 11px 28px;
  min-height: 44px;
  border: 2px solid var(--c-primary);
  color: var(--c-primary);
  font-family: var(--font-body);
  font-size: 15px;
  font-weight: 600;
  border-radius: 999px;
  transition: background var(--transition), color var(--transition);
}
.btn-outline:hover { background: var(--c-primary); color: var(--c-white); }

/* ===== Hero (首页) ===== */
.hero--home {
  position: relative;
  min-height: 45vh;
  display: flex;
  align-items: center;
  justify-content: flex-end;
  padding: var(--gap-lg) calc((100% - var(--max-w)) / 2 + 24px);
  overflow: hidden;
  background: radial-gradient(ellipse 80% 70% at 20% 50%, rgba(101,20,255,0.22) 0%, transparent 70%),
              linear-gradient(160deg, var(--c-dark) 60%, #2a1050 100%);
}
.hero__bg-text {
  position: absolute;
  left: -0.05em;
  top: 50%;
  transform: translateY(-50%);
  font-family: var(--font-head);
  font-size: clamp(120px, 22vw, 280px);
  font-weight: 700;
  color: rgba(101,20,255,0.08);
  line-height: 1;
  user-select: none;
  pointer-events: none;
  letter-spacing: -0.05em;
}
@keyframes bgPatternMove {
  0% { background-position: 0 0; }
  100% { background-position: 60px 60px; }
}
.hero--home::after {
  content: '';
  position: absolute;
  inset: 0;
  background-image: repeating-linear-gradient(
    45deg,
    rgba(191,0,255,0.04) 0px,
    rgba(191,0,255,0.04) 1px,
    transparent 1px,
    transparent 30px
  );
  animation: bgPatternMove 8s linear infinite;
  pointer-events: none;
}
.hero__content {
  position: relative;
  z-index: 2;
  text-align: right;
  max-width: 640px;
}
.hero__eyebrow {
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.12em;
  color: var(--c-accent);
  text-transform: uppercase;
  margin-bottom: 12px;
}
.hero__h1 {
  font-family: var(--font-head);
  font-size: clamp(32px, 5vw, 56px);
  font-weight: 700;
  line-height: 1.15;
  color: var(--c-white);
  margin-bottom: 20px;
}
.hero__sub {
  font-size: 17px;
  color: var(--c-muted);
  margin-bottom: 28px;
  max-width: 480px;
  margin-left: auto;
}

/* ===== 首页内容区 ===== */
.home-content {
  max-width: var(--max-prose);
  margin: 0 auto;
  padding: var(--gap-lg) 24px;
}

/* ===== section 头 ===== */
.section-header {
  display: flex;
  align-items: baseline;
  gap: 16px;
  margin-bottom: var(--gap-md);
  padding: 0 calc((100% - var(--max-w)) / 2 + 24px);
}
.section-num {
  font-family: var(--font-head);
  font-size: 48px;
  font-weight: 700;
  color: rgba(101,20,255,0.22);
  line-height: 1;
}
.section-title {
  font-family: var(--font-head);
  font-size: 28px;
  font-weight: 700;
  color: var(--c-white);
}

/* ===== 精选卡片网格 ===== */
.featured-section {
  padding: var(--gap-lg) 0;
  background: var(--c-dark2);
}
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: var(--gap-md);
  padding: 0 calc((100% - var(--max-w)) / 2 + 24px);
}
.card {
  background: var(--c-card-bg);
  border-radius: var(--r-card);
  border: 1px solid var(--c-border);
  padding: 28px;
  box-shadow: var(--shadow-card);
  display: flex;
  flex-direction: column;
  gap: 10px;
  cursor: pointer;
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
  position: relative;
  overflow: hidden;
}
.card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--c-primary), var(--c-accent));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 250ms ease;
}
.card:hover::before { transform: scaleX(1); }
.card:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 32px rgba(101,20,255,0.28);
  border-color: var(--c-primary);
}
.card__eyebrow {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.12em;
  color: var(--c-accent);
  text-transform: uppercase;
}
.card__title {
  font-family: var(--font-head);
  font-size: 18px;
  font-weight: 600;
  color: var(--c-white);
  line-height: 1.3;
}
.card__title a { color: inherit; }
.card__desc {
  font-size: 14px;
  color: var(--c-muted);
  flex: 1;
}
.card__arrow {
  font-size: 20px;
  color: var(--c-primary);
  margin-top: 8px;
  align-self: flex-end;
  transition: transform var(--transition);
}
.card:hover .card__arrow { transform: translateX(4px); }

/* ===== 最新内容列表 ===== */
.recent-section {
  padding: var(--gap-lg) 0;
}
.rcard-list {
  display: flex;
  flex-direction: column;
  gap: 0;
  padding: 0 calc((100% - var(--max-w)) / 2 + 24px);
  border-top: 1px solid var(--c-border);
}
.rcard {
  border-bottom: 1px solid var(--c-border);
}
.rcard__link {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 16px 0;
  transition: color var(--transition);
}
.rcard__link:hover { color: var(--c-accent); }
.rcard__tag {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--c-white);
  background: linear-gradient(120deg, var(--c-primary), var(--c-accent));
  padding: 3px 10px;
  border-radius: 999px;
  white-space: nowrap;
  flex-shrink: 0;
}
.rcard__title {
  font-size: 16px;
  font-weight: 500;
  color: var(--c-text);
  flex: 1;
}
.rcard__date {
  font-size: 13px;
  color: var(--c-muted);
  white-space: nowrap;
  flex-shrink: 0;
}
.section-more {
  padding: var(--gap-md) calc((100% - var(--max-w)) / 2 + 24px) 0;
}

/* ===== Topic 页面 ===== */
.topic-hero {
  position: relative;
  padding: 56px calc((100% - var(--max-w)) / 2 + 24px) 40px;
  overflow: hidden;
  background: linear-gradient(135deg, var(--c-dark3) 0%, var(--c-dark) 60%);
  border-bottom: 2px solid var(--c-border);
}
.topic-hero__bg-text {
  position: absolute;
  right: calc((100% - var(--max-w)) / 2 - 20px);
  top: 50%;
  transform: translateY(-50%);
  font-family: var(--font-head);
  font-size: clamp(100px, 18vw, 220px);
  font-weight: 700;
  color: rgba(191,0,255,0.07);
  line-height: 1;
  user-select: none;
  pointer-events: none;
}
.topic-hero__content { position: relative; z-index: 2; max-width: 700px; }
.topic-hero__h1 {
  font-family: var(--font-head);
  font-size: clamp(32px, 4.5vw, 52px);
  font-weight: 700;
  color: var(--c-white);
  margin-bottom: 14px;
  line-height: 1.2;
}
.topic-hero__desc {
  font-size: 17px;
  color: var(--c-muted);
  max-width: 560px;
}
.topic-body {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: var(--gap-lg) 24px;
}
.topic-body__prose {
  max-width: var(--max-prose);
  margin-bottom: var(--gap-lg);
}
.topic-children { margin-top: var(--gap-lg); }
.topic-children__heading {
  font-family: var(--font-head);
  font-size: 22px;
  font-weight: 700;
  color: var(--c-white);
  margin-bottom: var(--gap-md);
  padding-bottom: 12px;
  border-bottom: 2px solid var(--c-primary);
}
.topic-card {
  display: flex;
  align-items: flex-start;
  gap: 20px;
  padding: 20px 24px;
  background: var(--c-card-bg);
  border-radius: var(--r-card);
  border: 1px solid var(--c-border);
  margin-bottom: 12px;
  box-shadow: var(--shadow-card);
  transition: border-color var(--transition), transform var(--transition);
}
.topic-card:hover {
  border-color: var(--c-primary);
  transform: translateX(4px);
}
.topic-card__num {
  font-family: var(--font-head);
  font-size: 32px;
  font-weight: 700;
  color: rgba(101,20,255,0.3);
  line-height: 1;
  min-width: 44px;
  flex-shrink: 0;
}
.topic-card__body { flex: 1; }
.topic-card__title {
  font-family: var(--font-head);
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 6px;
  color: var(--c-white);
}
.topic-card__title a:hover { color: var(--c-accent); }
.topic-card__desc { font-size: 14px; color: var(--c-muted); }
.topic-card__date { font-size: 12px; color: var(--c-muted); margin-top: 6px; display: block; }
.topic-card__cta {
  display: inline-flex;
  align-items: center;
  padding: 8px 18px;
  min-height: 40px;
  background: var(--c-primary);
  color: var(--c-white);
  font-size: 14px;
  font-weight: 700;
  border-radius: 999px;
  flex-shrink: 0;
  transition: background var(--transition);
}
.topic-card__cta:hover { background: var(--c-accent); }

/* ===== 文章页面 ===== */
.article-layout {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: var(--gap-lg) 24px;
  display: grid;
  grid-template-columns: 1fr 300px;
  gap: 56px;
  align-items: start;
}
.article-main { min-width: 0; }
.article-header { margin-bottom: var(--gap-md); }
.breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--c-muted);
  margin-bottom: 16px;
}
.breadcrumb a:hover { color: var(--c-accent); }
.breadcrumb span { opacity: 0.5; }
.article-header__h1 {
  font-family: var(--font-head);
  font-size: clamp(28px, 3.5vw, 42px);
  font-weight: 700;
  color: var(--c-white);
  line-height: 1.2;
  margin-bottom: 14px;
}
.article-meta {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 12px;
  flex-wrap: wrap;
}
.article-meta__date, .article-meta__updated {
  font-size: 13px;
  color: var(--c-muted);
  padding: 4px 12px;
  border-radius: 999px;
  background: rgba(101,20,255,0.12);
  border: 1px solid var(--c-border);
}
.article-header__desc {
  font-size: 16px;
  color: var(--c-muted);
  border-left: 3px solid var(--c-primary);
  padding-left: 14px;
  margin-top: 10px;
}
.article-body section > div { max-width: var(--max-prose); }

/* ===== 侧边栏 ===== */
.article-sidebar {
  position: sticky;
  top: 100px;
}
.sidebar-block {
  background: var(--c-card-bg);
  border-radius: var(--r-card);
  border: 1px solid var(--c-border);
  padding: 20px;
  margin-bottom: 20px;
}
.sidebar-block__title {
  font-family: var(--font-head);
  font-size: 15px;
  font-weight: 700;
  color: var(--c-accent);
  margin-bottom: 14px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--c-border);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}
.rel-card { border-bottom: 1px solid var(--c-border); }
.rel-card:last-child { border-bottom: none; }
.rel-card__link {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 10px 0;
  transition: color var(--transition);
}
.rel-card__link:hover .rel-card__title { color: var(--c-accent); }
.rel-card__title { font-size: 14px; font-weight: 500; color: var(--c-text); line-height: 1.4; }
.rel-card__date { font-size: 12px; color: var(--c-muted); }
.sidebar-nav { display: flex; flex-direction: column; gap: 2px; }
.sidebar-nav li a {
  display: block;
  padding: 8px 10px;
  min-height: 40px;
  font-size: 14px;
  color: var(--c-muted);
  border-radius: 6px;
  transition: background var(--transition), color var(--transition);
  display: flex;
  align-items: center;
}
.sidebar-nav li a:hover { background: rgba(101,20,255,0.15); color: var(--c-white); }

/* ===== About 页面 ===== */
.about-hero {
  position: relative;
  padding: 64px calc((100% - var(--max-w)) / 2 + 24px) 48px;
  overflow: hidden;
  background: var(--c-dark2);
  border-bottom: 2px solid var(--c-border);
}
.about-hero__stripe {
  position: absolute;
  right: 0;
  top: 0;
  bottom: 0;
  width: 40%;
  background: repeating-linear-gradient(
    -45deg,
    rgba(101,20,255,0.06) 0px,
    rgba(101,20,255,0.06) 2px,
    transparent 2px,
    transparent 18px
  );
  pointer-events: none;
}
.about-hero__eyebrow {
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.14em;
  color: var(--c-accent);
  text-transform: uppercase;
  margin-bottom: 12px;
}
.about-hero__h1 {
  font-family: var(--font-head);
  font-size: clamp(30px, 4vw, 48px);
  font-weight: 700;
  color: var(--c-white);
  margin-bottom: 16px;
  max-width: 700px;
}
.about-hero__desc {
  font-size: 17px;
  color: var(--c-muted);
  max-width: 580px;
}
.about-body {
  max-width: var(--max-prose);
  margin: 0 auto;
  padding: var(--gap-lg) 24px;
}
.about-body__section > div { }

.about-links {
  padding: var(--gap-lg) calc((100% - var(--max-w)) / 2 + 24px);
  background: var(--c-dark2);
  border-top: 1px solid var(--c-border);
}
.about-links__title {
  font-family: var(--font-head);
  font-size: 20px;
  font-weight: 700;
  color: var(--c-white);
  margin-bottom: var(--gap-md);
}
.about-links__grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 16px;
}
.about-link-card {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 20px;
  min-height: 56px;
  background: var(--c-card-bg);
  border-radius: var(--r-card);
  border: 1px solid var(--c-border);
  transition: border-color var(--transition), background var(--transition);
}
.about-link-card:hover {
  border-color: var(--c-primary);
  background: rgba(101,20,255,0.12);
}
.about-link-card__label { font-size: 15px; font-weight: 600; color: var(--c-text); }
.about-link-card__arrow { font-size: 18px; color: var(--c-primary); transition: transform var(--transition); }
.about-link-card:hover .about-link-card__arrow { transform: translateX(4px); }

/* ===== Privacy 页面 ===== */
.privacy-hero {
  padding: 56px calc((100% - var(--max-w)) / 2 + 24px) 40px;
  background: linear-gradient(120deg, var(--c-dark2) 0%, var(--c-dark) 100%);
  border-bottom: 2px solid var(--c-border);
}
.privacy-hero__h1 {
  font-family: var(--font-head);
  font-size: clamp(28px, 3.5vw, 42px);
  font-weight: 700;
  color: var(--c-white);
  margin-bottom: 12px;
}
.privacy-hero__desc {
  font-size: 16px;
  color: var(--c-muted);
  max-width: 560px;
}
.privacy-hero__date {
  display: block;
  margin-top: 12px;
  font-size: 13px;
  color: var(--c-muted);
}
.privacy-body {
  max-width: var(--max-prose);
  margin: 0 auto;
  padding: var(--gap-lg) 24px;
}
.privacy-back {
  display: flex;
  gap: 16px;
  margin-top: var(--gap-lg);
  flex-wrap: wrap;
}

/* ===== 富文本正文通用样式 ===== */
.article-body section > div h2,
.topic-body__prose h2,
.about-body__section h2,
.privacy-body__section h2,
.home-content h2 {
  font-family: var(--font-head);
  font-size: 24px;
  font-weight: 700;
  color: var(--c-white);
  margin: 2em 0 0.7em;
  padding-left: 12px;
  border-left: 4px solid var(--c-primary);
}
.article-body section > div h3,
.topic-body__prose h3,
.about-body__section h3,
.privacy-body__section h3,
.home-content h3 {
  font-family: var(--font-head);
  font-size: 20px;
  font-weight: 600;
  color: var(--c-white);
  margin: 1.6em 0 0.6em;
}
.article-body section > div p,
.topic-body__prose p,
.about-body__section p,
.privacy-body__section p,
.home-content p {
  margin-bottom: 1.2em;
  color: var(--c-text);
  line-height: 1.8;
}
.article-body section > div a,
.topic-body__prose a,
.about-body__section a,
.privacy-body__section a,
.home-content a {
  color: var(--c-accent);
  text-decoration: underline;
  text-decoration-color: rgba(191,0,255,0.4);
  transition: text-decoration-color var(--transition);
}
.article-body section > div a:hover,
.topic-body__prose a:hover,
.about-body__section a:hover,
.privacy-body__section a:hover,
.home-content a:hover {
  text-decoration-color: var(--c-accent);
}
.article-body section > div ul,
.topic-body__prose ul,
.about-body__section ul,
.privacy-body__section ul,
.home-content ul {
  list-style: disc;
  padding-left: 1.4em;
  margin-bottom: 1.2em;
}
.article-body section > div ol,
.topic-body__prose ol,
.about-body__section ol,
.privacy-body__section ol,
.home-content ol {
  list-style: decimal;
  padding-left: 1.4em;
  margin-bottom: 1.2em;
}
.article-body section > div li,
.topic-body__prose li,
.about-body__section li,
.privacy-body__section li,
.home-content li {
  margin-bottom: 0.5em;
  color: var(--c-text);
}
.article-body section > div blockquote,
.topic-body__prose blockquote,
.about-body__section blockquote,
.privacy-body__section blockquote,
.home-content blockquote {
  border-left: 4px solid var(--c-accent);
  padding: 12px 20px;
  margin: 1.6em 0;
  background: rgba(191,0,255,0.06);
  border-radius: 0 8px 8px 0;
  color: var(--c-muted);
}
.article-body section > div strong,
.topic-body__prose strong,
.about-body__section strong,
.privacy-body__section strong,
.home-content strong {
  color: var(--c-white);
  font-weight: 700;
}
.article-body section > div code,
.topic-body__prose code,
.about-body__section code,
.privacy-body__section code,
.home-content code {
  background: rgba(101,20,255,0.2);
  padding: 2px 7px;
  border-radius: 4px;
  font-size: 0.92em;
  color: var(--c-accent);
}

/* ===== 面包屑 ===== */
.prose-block { }

/* ===== 页脚 ===== */
.site-footer {
  background: var(--c-dark2);
  border-top: 2px solid var(--c-border);
  margin-top: 56px;
}
.footer-top {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 40px 24px 32px;
  display: flex;
  align-items: flex-start;
  gap: 48px;
  flex-wrap: wrap;
}
.footer-brand { flex: 1; min-width: 160px; }
.footer-brand__name {
  font-family: var(--font-head);
  font-size: 22px;
  font-weight: 700;
  background: linear-gradient(120deg, var(--c-primary), var(--c-accent));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  display: block;
  margin-bottom: 8px;
}
.footer-brand__tagline { font-size: 13px; color: var(--c-muted); }
.footer-nav { flex: 2; min-width: 200px; }
.footer-nav dl { display: flex; flex-wrap: wrap; gap: 0 32px; }
.footer-nav dt {
  width: 100%;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--c-accent);
  margin-bottom: 10px;
}
.footer-nav dd { margin: 0; }
.footer-nav dd a {
  display: inline-flex;
  align-items: center;
  padding: 6px 0;
  min-height: 40px;
  font-size: 14px;
  color: var(--c-muted);
  transition: color var(--transition);
}
.footer-nav dd a:hover { color: var(--c-white); }
.footer-bottom {
  border-top: 1px solid var(--c-border);
  padding: 14px 24px;
  text-align: center;
}
.footer-copy {
  font-size: 13px;
  color: var(--c-muted);
}
.footer-copy a { color: var(--c-muted); text-decoration: underline; text-decoration-color: transparent; transition: color var(--transition), text-decoration-color var(--transition); }
.footer-copy a:hover { color: var(--c-accent); text-decoration-color: var(--c-accent); }

/* ===== 动效 ===== */
@media (prefers-reduced-motion: no-preference) {
  .card, .topic-card, .rcard__link {
    transition: transform 200ms ease, box-shadow 200ms ease, border-color 200ms ease;
  }
  .hero--home::after {
    animation: bgPatternMove 8s linear infinite;
  }
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
}

/* ===== 响应式 ===== */
@media (max-width: 900px) {
  .article-layout {
    grid-template-columns: 1fr;
    gap: 40px;
  }
  .article-sidebar {
    position: static;
  }
}

@media (max-width: 680px) {
  :root {
    --gap-lg: 40px;
    --gap-md: 24px;
  }
  .brand-row {
    padding: 12px 16px;
    flex-wrap: wrap;
  }
  .brand-row__slogan { display: none; }
  .caps-nav { padding: 8px 12px; }
  .caps-btn { padding: 8px 14px; font-size: 13px; }
  .hero--home {
    padding: 40px 16px;
    min-height: 45vh;
    justify-content: flex-start;
  }
  .hero__content { text-align: left; max-width: 100%; }
  .hero__sub { margin-left: 0; }
  .hero__bg-text { font-size: clamp(80px, 30vw, 140px); opacity: 0.5; }
  .section-header { padding: 0 16px; }
  .card-grid { padding: 0 16px; gap: 16px; }
  .rcard-list, .section-more { padding-left: 16px; padding-right: 16px; }
  .featured-section, .recent-section { padding: 36px 0; }
  .topic-hero { padding: 40px 16px 32px; }
  .topic-body { padding: var(--gap-lg) 16px; }
  .topic-card { flex-wrap: wrap; gap: 12px; }
  .topic-card__num { font-size: 24px; }
  .article-layout { padding: var(--gap-lg) 16px; }
  .article-header__h1 { font-size: 26px; }
  .about-hero { padding: 48px 16px 36px; }
  .about-links { padding: 40px 16px; }
  .about-links__grid { grid-template-columns: 1fr 1fr; }
  .privacy-hero { padding: 40px 16px 32px; }
  .privacy-body { padding: var(--gap-lg) 16px; }
  .footer-top { padding: 32px 16px 24px; gap: 28px; }
  .footer-nav dl { gap: 0 16px; }
  .home-content { padding: 36px 16px; }
  .section-num { font-size: 32px; }
  .section-title { font-size: 22px; }
}

@media (max-width: 400px) {
  .about-links__grid { grid-template-columns: 1fr; }
  .caps-btn { padding: 8px 12px; font-size: 12px; }
}