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

/* ===== CSS 变量 ===== */
:root {
  --c-primary: #56228b;
  --c-primary-light: #7a3db8;
  --c-primary-dark: #3d1865;
  --c-accent: #8b4513;
  --c-accent-light: #b05a1e;
  --c-bg: #1f1726;
  --c-bg2: #2a1e35;
  --c-bg3: #332442;
  --c-glass: rgba(86, 34, 139, 0.18);
  --c-glass-border: rgba(122, 61, 184, 0.35);
  --c-text: #e8dff5;
  --c-text-muted: #a991c8;
  --c-text-dim: #7a6a96;
  --c-white: #fff;
  --radius-sm: 12px;
  --radius-md: 18px;
  --radius-lg: 24px;
  --radius-xl: 32px;
  --font-body: 'Quicksand', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  --font-display: 'Caveat', 'Quicksand', cursive;
  --shadow-soft: 0 4px 24px rgba(0,0,0,0.35), 0 1px 4px rgba(86,34,139,0.2);
  --shadow-card: 0 8px 32px rgba(0,0,0,0.4), 0 2px 8px rgba(86,34,139,0.25);
  --shadow-hover: 0 16px 48px rgba(0,0,0,0.5), 0 4px 16px rgba(86,34,139,0.4);
  --transition: 0.25s cubic-bezier(0.4,0,0.2,1);
}

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

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

body {
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.7;
  color: var(--c-text);
  background: var(--c-bg);
  min-height: 100vh;
  overflow-x: hidden;
}

img { max-width: 100%; height: auto; display: block; border-radius: var(--radius-sm); }

a { color: var(--c-primary-light); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--c-white); }
a:focus-visible { outline: 2px solid var(--c-primary-light); outline-offset: 3px; border-radius: 4px; }

ul, menu { list-style: none; }

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

/* ===== 顶部导航 ===== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(31,23,38,0.92);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--c-glass-border);
}

.header-inner {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 1.5rem;
  height: 64px;
  display: flex;
  align-items: center;
  gap: 1.5rem;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  color: var(--c-white);
  font-family: var(--font-display);
  font-size: 1.3rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  flex-shrink: 0;
  text-decoration: none;
}
.brand:hover { color: var(--c-primary-light); }
.brand-mark { width: 36px; height: 36px; border-radius: 8px; }

.main-nav { flex: 1; }

/* details/summary 导航 */
.nav-details { position: relative; }

.nav-toggle {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.55rem 1.1rem;
  background: var(--c-glass);
  border: 1px solid var(--c-glass-border);
  border-radius: var(--radius-md);
  color: var(--c-text);
  font-family: var(--font-body);
  font-size: 0.95rem;
  font-weight: 500;
  cursor: pointer;
  list-style: none;
  transition: background var(--transition), border-color var(--transition);
  min-height: 40px;
}
.nav-toggle::-webkit-details-marker { display: none; }
.nav-toggle::after {
  content: '▾';
  font-size: 0.75rem;
  transition: transform var(--transition);
}
.nav-details[open] .nav-toggle::after { transform: rotate(180deg); }
.nav-toggle:hover {
  background: rgba(86,34,139,0.35);
  border-color: var(--c-primary-light);
  color: var(--c-white);
}

.nav-menu {
  position: absolute;
  top: calc(100% + 8px);
  left: 0;
  min-width: 220px;
  background: rgba(42,30,53,0.97);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--c-glass-border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-card);
  padding: 0.5rem;
  z-index: 200;
  animation: menuFadeIn 0.18s ease;
}

@keyframes menuFadeIn {
  from { opacity: 0; transform: translateY(-6px); }
  to { opacity: 1; transform: translateY(0); }
}

.nav-menu li a {
  display: block;
  padding: 0.6rem 1rem;
  border-radius: var(--radius-sm);
  color: var(--c-text);
  font-size: 0.95rem;
  font-weight: 500;
  transition: background var(--transition), color var(--transition);
  min-height: 40px;
  line-height: 1.5;
  display: flex;
  align-items: center;
}
.nav-menu li a:hover {
  background: var(--c-glass);
  color: var(--c-white);
}

.header-cta {
  display: inline-flex;
  align-items: center;
  padding: 0.55rem 1.25rem;
  background: linear-gradient(135deg, var(--c-primary), var(--c-primary-light));
  color: var(--c-white);
  border-radius: var(--radius-md);
  font-size: 0.9rem;
  font-weight: 600;
  white-space: nowrap;
  transition: box-shadow var(--transition), transform var(--transition);
  min-height: 40px;
  flex-shrink: 0;
}
.header-cta:hover {
  box-shadow: 0 4px 20px rgba(86,34,139,0.5);
  transform: translateY(-1px);
  color: var(--c-white);
}

/* ===== Hero ===== */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  gap: 4rem;
  padding: 6rem 2rem 4rem;
  max-width: 1280px;
  margin: 0 auto;
  width: 100%;
}

.hero-text {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  justify-content: center;
  gap: 1.5rem;
}

.hero-text h1 {
  font-family: var(--font-display);
  font-size: clamp(2rem, 5vw, 3.5rem);
  font-weight: 700;
  color: var(--c-white);
  line-height: 1.2;
}

.hero-sub {
  font-size: 1.1rem;
  color: var(--c-text-muted);
  line-height: 1.7;
  max-width: 420px;
}

.hero-media {
  flex: 1;
  max-width: 520px;
  border-radius: var(--radius-xl);
  overflow: hidden;
  box-shadow: var(--shadow-hover);
}
.hero-media img { width: 100%; height: 100%; object-fit: cover; border-radius: var(--radius-xl); }
.hero-placeholder {
  min-height: 400px;
  background: linear-gradient(135deg, var(--c-bg2), var(--c-bg3));
  border: 1px solid var(--c-glass-border);
}

/* ===== 按钮 ===== */
.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.75rem 2rem;
  background: linear-gradient(135deg, var(--c-primary), var(--c-primary-light));
  color: var(--c-white);
  border-radius: var(--radius-md);
  font-size: 1rem;
  font-weight: 600;
  transition: box-shadow var(--transition), transform var(--transition);
  min-height: 48px;
  text-decoration: none;
}
.btn-primary:hover {
  box-shadow: 0 6px 28px rgba(86,34,139,0.55);
  transform: translateY(-2px);
  color: var(--c-white);
}

/* ===== 主体内容布局 ===== */
.content-layout {
  flex: 1;
  display: flex;
  gap: 2rem;
  max-width: 1280px;
  margin: 0 auto;
  padding: 2.5rem 1.5rem;
  width: 100%;
  align-items: flex-start;
}

.content-main { flex: 1; min-width: 0; }

/* 正文容器契约：main > article.wrap > section > div */
main { width: 100%; }
.wrap { width: 100%; }
.content-section { width: 100%; }
.page-article { width: 100%; }

/* ===== 侧边栏 ===== */
.content-aside {
  width: 260px;
  flex-shrink: 0;
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.aside-block {
  background: var(--c-glass);
  border: 1px solid var(--c-glass-border);
  border-radius: var(--radius-md);
  padding: 1.25rem;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}

.aside-block h3 {
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 600;
  color: var(--c-primary-light);
  margin-bottom: 0.75rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--c-glass-border);
}

.aside-list li a {
  display: block;
  padding: 0.4rem 0.5rem;
  border-radius: 8px;
  color: var(--c-text-muted);
  font-size: 0.9rem;
  transition: background var(--transition), color var(--transition);
  min-height: 36px;
  line-height: 1.5;
  display: flex;
  align-items: center;
}
.aside-list li a:hover {
  background: rgba(86,34,139,0.25);
  color: var(--c-white);
}

/* ===== 正文排版 ===== */
.prose {
  font-size: 1rem;
  line-height: 1.8;
  color: var(--c-text);
  max-width: 72ch;
}

.prose h1, .prose h2, .prose h3, .prose h4 {
  font-family: var(--font-display);
  color: var(--c-white);
  margin: 1.75rem 0 0.75rem;
  line-height: 1.3;
}
.prose h2 { font-size: 1.5rem; }
.prose h3 { font-size: 1.2rem; color: var(--c-primary-light); }

.prose p { margin-bottom: 1.1rem; }

.prose a {
  color: var(--c-primary-light);
  border-bottom: 1px solid rgba(122,61,184,0.4);
  transition: color var(--transition), border-color var(--transition);
}
.prose a:hover { color: var(--c-white); border-color: var(--c-white); }

.prose ul, .prose ol {
  padding-left: 1.5rem;
  margin-bottom: 1rem;
  list-style: disc;
}
.prose li { margin-bottom: 0.4rem; }

.prose strong { color: var(--c-white); font-weight: 600; }

.prose blockquote {
  border-left: 3px solid var(--c-primary);
  padding: 0.75rem 1.25rem;
  background: var(--c-glass);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  margin: 1.5rem 0;
  color: var(--c-text-muted);
}

.prose img {
  width: 100%;
  border-radius: var(--radius-md);
  margin: 1.5rem 0;
  box-shadow: var(--shadow-card);
}

/* ===== 页面横幅 ===== */
.page-banner {
  background: linear-gradient(135deg, var(--c-bg2) 0%, var(--c-primary-dark) 100%);
  border-bottom: 1px solid var(--c-glass-border);
  padding: 4rem 1.5rem 3rem;
}

.banner-inner {
  max-width: 900px;
  margin: 0 auto;
}

.page-banner h1 {
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 4vw, 3rem);
  color: var(--c-white);
  margin-bottom: 0.75rem;
}

.banner-desc {
  font-size: 1.05rem;
  color: var(--c-text-muted);
  max-width: 580px;
}

.tag-eyebrow {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--c-accent-light);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 0.5rem;
}

/* ===== 卡片：子页列表（契约：a > strong 并列） ===== */
.child-cards {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 1.25rem;
  margin-top: 2rem;
}

.child-card {
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
  padding: 1.25rem;
  background: var(--c-glass);
  border: 1px solid var(--c-glass-border);
  border-radius: var(--radius-md);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  color: var(--c-text);
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
  text-decoration: none;
}
.child-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
  border-color: var(--c-primary-light);
  color: var(--c-white);
}
.child-card strong {
  font-family: var(--font-display);
  font-size: 1.05rem;
  color: var(--c-white);
  font-weight: 600;
  line-height: 1.3;
}
.card-thumb { overflow: hidden; border-radius: var(--radius-sm); }
.card-thumb img { width: 100%; aspect-ratio: 16/9; object-fit: cover; transition: transform var(--transition); }
.child-card:hover .card-thumb img { transform: scale(1.04); }
.card-desc { font-size: 0.88rem; color: var(--c-text-muted); line-height: 1.5; }

/* ===== 分类卡片块 ===== */
.cat-overview {
  background: var(--c-bg2);
  border-top: 1px solid var(--c-glass-border);
  padding: 3rem 1.5rem;
}

.cat-grid {
  max-width: 1280px;
  margin: 0 auto;
}

.cat-grid h2 {
  font-family: var(--font-display);
  font-size: 1.75rem;
  color: var(--c-white);
  margin-bottom: 1.5rem;
}

.cat-blocks {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 1rem;
}

.cat-block {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  padding: 1.25rem 1.5rem;
  background: var(--c-glass);
  border: 1px solid var(--c-glass-border);
  border-radius: var(--radius-md);
  color: var(--c-text);
  transition: background var(--transition), border-color var(--transition), transform var(--transition);
  text-decoration: none;
}
.cat-block:hover {
  background: rgba(86,34,139,0.3);
  border-color: var(--c-primary-light);
  transform: translateY(-2px);
  color: var(--c-white);
}
.cat-block strong {
  font-size: 1rem;
  font-weight: 600;
  color: var(--c-white);
}
.cat-block span {
  font-size: 0.85rem;
  color: var(--c-text-muted);
}

/* ===== Entry 网格（栏目页子页列表） ===== */
.entry-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 1.25rem;
  margin-top: 1rem;
}

.entry-card {
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
  padding: 1.25rem;
  background: var(--c-glass);
  border: 1px solid var(--c-glass-border);
  border-radius: var(--radius-md);
  color: var(--c-text);
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
  text-decoration: none;
}
.entry-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-hover);
  border-color: var(--c-primary-light);
  color: var(--c-white);
}
.entry-card strong.entry-title {
  font-size: 1rem;
  font-weight: 600;
  color: var(--c-white);
  line-height: 1.3;
}
.entry-img { overflow: hidden; border-radius: var(--radius-sm); }
.entry-img img { width: 100%; aspect-ratio: 16/9; object-fit: cover; transition: transform var(--transition); }
.entry-card:hover .entry-img img { transform: scale(1.04); }
.entry-excerpt { font-size: 0.88rem; color: var(--c-text-muted); }
.entry-date { font-size: 0.8rem; color: var(--c-text-dim); }

/* ===== Tag 网格 ===== */
.tag-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 1.25rem;
  margin-top: 1rem;
}

.tag-entry-card {
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
  padding: 1.25rem;
  background: var(--c-glass);
  border: 1px solid var(--c-glass-border);
  border-radius: var(--radius-md);
  color: var(--c-text);
  transition: transform var(--transition), box-shadow var(--transition);
  text-decoration: none;
}
.tag-entry-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-hover);
  color: var(--c-white);
}
.tag-entry-card strong {
  font-size: 1rem;
  font-weight: 600;
  color: var(--c-white);
}
.tag-img { overflow: hidden; border-radius: var(--radius-sm); }
.tag-img img { width: 100%; aspect-ratio: 16/9; object-fit: cover; }
.tag-entry-desc { font-size: 0.88rem; color: var(--c-text-muted); }
.tag-entry-card time { font-size: 0.8rem; color: var(--c-text-dim); }

/* ===== Entry 详情页 ===== */
.entry-hero { margin-bottom: 2rem; border-radius: var(--radius-lg); overflow: hidden; }
.entry-hero-img { width: 100%; max-height: 400px; object-fit: cover; border-radius: var(--radius-lg); }

.entry-header { margin-bottom: 2rem; }

.breadcrumb {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  font-size: 0.9rem;
  color: var(--c-accent-light);
  margin-bottom: 0.75rem;
  transition: color var(--transition);
}
.breadcrumb::before { content: '←'; }
.breadcrumb:hover { color: var(--c-white); }

.entry-header h1 {
  font-family: var(--font-display);
  font-size: clamp(1.6rem, 3.5vw, 2.4rem);
  color: var(--c-white);
  line-height: 1.25;
  margin-bottom: 0.75rem;
}

.entry-meta {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

.pub-date, .mod-date {
  font-size: 0.85rem;
  color: var(--c-text-dim);
  padding: 0.25rem 0.75rem;
  background: var(--c-glass);
  border-radius: 20px;
  border: 1px solid var(--c-glass-border);
}

/* ===== About / Privacy 页面 ===== */
.about-header, .privacy-header {
  margin-bottom: 2.5rem;
  padding-bottom: 1.5rem;
  border-bottom: 1px solid var(--c-glass-border);
}
.about-header h1, .privacy-header h1 {
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  color: var(--c-white);
  margin-bottom: 0.75rem;
}

/* ===== 小标题装饰（h2/h3 > span） ===== */
.section-heading {
  font-family: var(--font-display);
  font-size: 1.5rem;
  color: var(--c-white);
  margin: 2.5rem 0 1.25rem;
  display: flex;
  align-items: center;
  gap: 0.75rem;
}
.section-heading span {
  position: relative;
}
.section-heading span::after {
  content: '';
  display: block;
  height: 3px;
  background: linear-gradient(90deg, var(--c-primary), transparent);
  border-radius: 2px;
  margin-top: 4px;
}

h2 span, h3 span {
  display: inline;
}

/* ===== 页脚 ===== */
.site-footer {
  background: var(--c-bg2);
  border-top: 1px solid var(--c-glass-border);
  margin-top: auto;
}

.footer-cta-block {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  padding: 2.5rem 2rem;
  background: linear-gradient(135deg, var(--c-primary-dark), var(--c-bg2));
  border-bottom: 1px solid var(--c-glass-border);
  flex-wrap: wrap;
}

.footer-cta-text {
  font-family: var(--font-display);
  font-size: 1.25rem;
  color: var(--c-white);
  font-weight: 600;
}

.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1.25rem 2rem;
  flex-wrap: wrap;
}

.footer-address {
  font-style: normal;
  font-size: 0.9rem;
  color: var(--c-text-muted);
}

.footer-links {
  display: flex;
  gap: 0.25rem;
  flex-wrap: wrap;
  list-style: none;
}
.footer-links li a {
  padding: 0.4rem 0.75rem;
  font-size: 0.9rem;
  color: var(--c-text-muted);
  border-radius: 8px;
  transition: background var(--transition), color var(--transition);
  min-height: 40px;
  display: inline-flex;
  align-items: center;
}
.footer-links li a:hover {
  background: var(--c-glass);
  color: var(--c-white);
}

/* ===== Scroll Reveal 动效 ===== */
.reveal {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.5s ease, transform 0.5s ease;
}
.reveal.visible {
  opacity: 1;
  transform: none;
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
  .reveal { opacity: 1; transform: none; }
}

/* ===== 响应式 ===== */
@media (max-width: 1024px) {
  .content-aside { width: 220px; }
  .hero { gap: 2.5rem; }
}

@media (max-width: 768px) {
  .hero {
    flex-direction: column;
    min-height: auto;
    padding: 5rem 1.25rem 3rem;
    gap: 2rem;
  }
  .hero-media { max-width: 100%; width: 100%; }
  .hero-text { align-items: center; text-align: center; }
  .hero-sub { text-align: center; }

  .content-layout {
    flex-direction: column;
    padding: 1.5rem 1rem;
    gap: 1.5rem;
  }
  .content-aside { width: 100%; }

  .header-inner { padding: 0 1rem; gap: 0.75rem; }
  .brand-name { font-size: 1.1rem; }

  .entry-grid,
  .tag-grid,
  .child-cards { grid-template-columns: 1fr 1fr; }

  .cat-blocks { grid-template-columns: 1fr 1fr; }

  .footer-cta-block { flex-direction: column; align-items: flex-start; padding: 2rem 1.25rem; }
  .footer-bottom { padding: 1rem 1.25rem; }
}

@media (max-width: 480px) {
  body { font-size: 1rem; }

  .entry-grid,
  .tag-grid,
  .child-cards { grid-template-columns: 1fr; }

  .cat-blocks { grid-template-columns: 1fr; }

  .page-banner { padding: 3rem 1rem 2rem; }

  .nav-menu { min-width: 180px; }

  .footer-links { gap: 0; }
}

/* ===== 工具类 ===== */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0,0,0,0);
  border: 0;
}