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

/* ===== CSS 变量 ===== */
:root {
  --c-primary: #56228b;
  --c-secondary: #8b4513;
  --c-dark: #1f1726;
  --c-primary-light: #7a3db8;
  --c-primary-pale: #f0e8fa;
  --c-secondary-light: #b05c1e;
  --c-secondary-pale: #faf0e6;
  --c-text: #2a1a3a;
  --c-text-muted: #6b5c7a;
  --c-bg: #fdfaf8;
  --c-surface: #ffffff;
  --c-border: #e8dff5;
  --c-nav-bg: #1f1726;
  --c-nav-text: #e8dff5;
  --c-nav-accent: #8b5eab;
  --c-nav-hover: #56228b;
  --c-card-line: #56228b;
  --sidebar-w: 240px;
  --radius-sm: 12px;
  --radius-md: 18px;
  --radius-lg: 24px;
  --shadow-soft: 0 4px 20px rgba(86,34,139,0.10);
  --shadow-card: 0 2px 12px rgba(86,34,139,0.08);
  --font-main: 'Noto Sans KR', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
  --transition: 0.22s ease;
}

/* ===== 重置 ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { font-size: 16px; scroll-behavior: smooth; }
body {
  font-family: var(--font-main);
  background: var(--c-bg);
  color: var(--c-text);
  line-height: 1.7;
  min-height: 100vh;
  overflow-x: hidden;
}
img { max-width: 100%; height: auto; display: block; }
a { color: var(--c-primary); text-decoration: none; }
a:hover { color: var(--c-primary-light); }
ol, ul { list-style: none; }
button { cursor: pointer; font-family: var(--font-main); }

/* ===== 布局骨架 ===== */
.layout-wrap {
  display: flex;
  min-height: 100vh;
  position: relative;
}

.main-content {
  flex: 1;
  margin-left: var(--sidebar-w);
  display: flex;
  flex-direction: column;
  min-width: 0;
}

/* ===== 侧边导航 ===== */
.sidebar-nav {
  position: fixed;
  top: 0;
  left: 0;
  width: var(--sidebar-w);
  height: 100vh;
  background: var(--c-nav-bg);
  display: flex;
  flex-direction: column;
  z-index: 200;
  overflow-y: auto;
  overflow-x: hidden;
  border-right: 2px solid rgba(86,34,139,0.3);
}

.nav-brand {
  padding: 24px 20px 16px;
  border-bottom: 1px solid rgba(139,94,171,0.3);
  display: flex;
  align-items: center;
  gap: 10px;
}

.nav-logo-mark {
  border-radius: 50%;
  flex-shrink: 0;
}

.nav-logo-text {
  font-size: 14px;
  font-weight: 700;
  color: var(--c-nav-text);
  letter-spacing: 0.02em;
  line-height: 1.3;
  word-break: break-all;
}

.nav-search {
  padding: 14px 16px;
  border-bottom: 1px solid rgba(139,94,171,0.2);
}

.nav-search input {
  width: 100%;
  padding: 8px 12px;
  border: 1px solid rgba(139,94,171,0.4);
  border-radius: var(--radius-sm);
  background: rgba(255,255,255,0.07);
  color: var(--c-nav-text);
  font-size: 13px;
  font-family: var(--font-main);
  outline: none;
  transition: border-color var(--transition), background var(--transition);
  min-height: 40px;
}

.nav-search input::placeholder { color: rgba(232,223,245,0.45); }
.nav-search input:focus {
  border-color: var(--c-primary);
  background: rgba(86,34,139,0.15);
}

.sidebar-nav > ol {
  flex: 1;
  padding: 12px 0 24px;
}

.sidebar-nav > ol > li > a {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 11px 20px;
  color: var(--c-nav-text);
  font-size: 13px;
  font-weight: 400;
  line-height: 1.4;
  min-height: 44px;
  transition: background var(--transition), color var(--transition), padding-left var(--transition);
  border-left: 3px solid transparent;
  word-break: break-all;
}

.sidebar-nav > ol > li > a:hover {
  background: rgba(86,34,139,0.25);
  color: #fff;
  border-left-color: var(--c-primary);
  padding-left: 24px;
}

/* ===== 汉堡按钮（移动端）===== */
.nav-toggle {
  display: none;
  position: fixed;
  top: 14px;
  left: 14px;
  z-index: 300;
  background: var(--c-primary);
  color: #fff;
  border: none;
  width: 44px;
  height: 44px;
  border-radius: var(--radius-sm);
  font-size: 20px;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-soft);
}

/* ===== Hero：首页 ===== */
.hero-section {
  position: relative;
  min-height: 45vh;
  background: linear-gradient(135deg, var(--c-dark) 0%, #2d1848 60%, #3a1a5a 100%);
  display: flex;
  align-items: center;
  overflow: hidden;
  padding: 48px 48px 40px;
}

.hero-dots {
  position: absolute;
  top: 10px;
  right: 40px;
  pointer-events: none;
}

.hero-blob {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
}

.hero-inner {
  position: relative;
  z-index: 1;
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 40px;
  width: 100%;
  max-width: 900px;
  margin-left: auto;
}

.hero-text {
  text-align: right;
  flex: 1;
}

.hero-h1 {
  font-size: clamp(1.5rem, 3vw, 2.2rem);
  font-weight: 700;
  color: #fff;
  line-height: 1.3;
  margin-bottom: 14px;
  letter-spacing: 0.01em;
}

.hero-sub {
  font-size: 15px;
  color: rgba(232,223,245,0.75);
  margin-bottom: 24px;
  line-height: 1.6;
  max-width: 420px;
  margin-left: auto;
}

.hero-cta-row {
  display: flex;
  gap: 12px;
  justify-content: flex-end;
  flex-wrap: wrap;
}

.btn-primary {
  display: inline-flex;
  align-items: center;
  padding: 10px 24px;
  background: var(--c-primary);
  color: #fff;
  border-radius: var(--radius-md);
  font-size: 14px;
  font-weight: 500;
  min-height: 44px;
  transition: background var(--transition), transform var(--transition), box-shadow var(--transition);
  box-shadow: 0 4px 14px rgba(86,34,139,0.4);
}

.btn-primary:hover {
  background: var(--c-primary-light);
  color: #fff;
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(86,34,139,0.5);
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  padding: 10px 24px;
  background: transparent;
  color: var(--c-nav-text);
  border: 1.5px solid rgba(139,94,171,0.5);
  border-radius: var(--radius-md);
  font-size: 14px;
  font-weight: 400;
  min-height: 44px;
  transition: border-color var(--transition), background var(--transition), color var(--transition);
}

.btn-secondary:hover {
  border-color: var(--c-primary);
  background: rgba(86,34,139,0.18);
  color: #fff;
}

.hero-icon {
  flex-shrink: 0;
  animation: hero-float 4s ease-in-out infinite;
}

@keyframes hero-float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-10px); }
}

/* ===== 首页布局 ===== */
main {
  flex: 1;
  padding: 40px 48px 32px;
  max-width: 1100px;
  width: 100%;
  margin: 0 auto;
  box-sizing: border-box;
}

/* 正文与 aside 并排 */
.home-prose-section,
.topic-body-section,
.article-body-section,
.about-body-section,
.privacy-body-section {
  display: flex;
  gap: 32px;
  align-items: flex-start;
  margin-bottom: 48px;
}

/* aside 在左侧 */
.home-aside,
.topic-aside,
.article-aside,
.about-aside,
.privacy-aside {
  width: 200px;
  flex-shrink: 0;
  background: var(--c-surface);
  border-radius: var(--radius-md);
  padding: 20px 16px;
  box-shadow: var(--shadow-card);
  border-top: 3px solid var(--c-primary);
}

.aside-title {
  font-size: 13px;
  font-weight: 700;
  color: var(--c-primary);
  margin-bottom: 12px;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.aside-title span { display: inline; }

.aside-subtitle {
  font-size: 12px;
  font-weight: 700;
  color: var(--c-secondary);
  margin: 14px 0 8px;
  letter-spacing: 0.04em;
}

.aside-subtitle span { display: inline; }

.aside-nav-list li {
  border-bottom: 1px solid var(--c-border);
}
.aside-nav-list li:last-child { border-bottom: none; }

.aside-nav-list li a {
  display: block;
  padding: 8px 4px;
  font-size: 12px;
  color: var(--c-text);
  line-height: 1.4;
  transition: color var(--transition), padding-left var(--transition);
  min-height: 36px;
  display: flex;
  align-items: center;
}

.aside-nav-list li a span { flex: 1; }

.aside-nav-list li a:hover {
  color: var(--c-primary);
  padding-left: 6px;
}

.aside-organic { margin-top: 16px; display: flex; justify-content: center; }

.aside-hero-fig { margin-top: 14px; border-radius: var(--radius-sm); overflow: hidden; }

.home-prose,
.topic-prose-col,
.article-prose-col,
.about-prose-col,
.privacy-prose-col {
  flex: 1;
  min-width: 0;
}

/* ===== 正文排版 ===== */
.prose {
  font-size: 16px;
  line-height: 1.8;
  color: var(--c-text);
}

.prose h2 {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--c-primary);
  margin: 28px 0 12px;
  padding-left: 12px;
  border-left: 3px solid var(--c-secondary);
}

.prose h3 {
  font-size: 1.05rem;
  font-weight: 500;
  color: var(--c-dark);
  margin: 20px 0 10px;
}

.prose p { margin-bottom: 14px; }
.prose ul, .prose ol { margin: 12px 0 14px 20px; }
.prose li { margin-bottom: 6px; list-style: disc; }
.prose ol li { list-style: decimal; }
.prose a { color: var(--c-primary); text-decoration: underline; }
.prose a:hover { color: var(--c-primary-light); }
.prose strong { color: var(--c-dark); font-weight: 700; }
.prose em { color: var(--c-secondary); }
.prose code {
  font-family: 'Fira Code', 'Consolas', monospace;
  background: var(--c-primary-pale);
  color: var(--c-primary);
  padding: 2px 6px;
  border-radius: 6px;
  font-size: 14px;
}
.prose pre {
  background: var(--c-dark);
  color: #e8dff5;
  padding: 16px;
  border-radius: var(--radius-sm);
  overflow-x: auto;
  margin: 16px 0;
}
.prose blockquote {
  border-left: 4px solid var(--c-primary);
  padding: 10px 16px;
  background: var(--c-primary-pale);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  margin: 16px 0;
  color: var(--c-text-muted);
}

/* ===== Section 标题 ===== */
.section-heading {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--c-dark);
  margin-bottom: 20px;
  padding-bottom: 8px;
  border-bottom: 2px solid var(--c-border);
  display: flex;
  align-items: center;
  gap: 8px;
}

.section-heading::before {
  content: '';
  display: inline-block;
  width: 4px;
  height: 18px;
  background: var(--c-primary);
  border-radius: 2px;
  flex-shrink: 0;
}

.section-heading span { flex: 1; }

/* ===== Topic Cards ===== */
.topics-section { margin-bottom: 48px; }

.topic-cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 20px;
}

.topic-card {
  background: var(--c-surface);
  border-radius: 0;
  box-shadow: var(--shadow-card);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: transform var(--transition), box-shadow var(--transition);
}

.topic-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 28px rgba(86,34,139,0.15);
}

.card-inner {
  padding: 20px 18px 14px;
  flex: 1;
}

.card-title {
  font-size: 14px;
  font-weight: 700;
  color: var(--c-dark);
  margin-bottom: 8px;
  line-height: 1.4;
}

.card-title span { display: inline; }

.card-desc {
  font-size: 13px;
  color: var(--c-text-muted);
  line-height: 1.5;
  margin-bottom: 12px;
  display: -webkit-box;
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 3;
  overflow: hidden;
}

.card-link {
  display: inline-flex;
  align-items: center;
  font-size: 13px;
  color: var(--c-primary);
  font-weight: 500;
  transition: color var(--transition), letter-spacing var(--transition);
  min-height: 32px;
}

.card-link:hover {
  color: var(--c-primary-light);
  letter-spacing: 0.04em;
}

.card-accent-line {
  height: 4px;
  background: linear-gradient(90deg, var(--c-primary), var(--c-secondary));
  flex-shrink: 0;
}

/* ===== 最新文章列表 ===== */
.recent-section {
  margin-bottom: 40px;
  display: flex;
  flex-direction: column;
}

.recent-aside {
  display: flex;
  justify-content: flex-start;
  margin-bottom: 12px;
}

.recent-deco { opacity: 0.7; }

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

.recent-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 0;
  border-bottom: 1px solid var(--c-border);
  gap: 12px;
  flex-wrap: wrap;
}

.recent-item:last-child { border-bottom: none; }

.recent-item a {
  font-size: 15px;
  color: var(--c-text);
  font-weight: 400;
  line-height: 1.4;
  flex: 1;
  min-width: 0;
  transition: color var(--transition);
}

.recent-item a:hover { color: var(--c-primary); }
.recent-item a span { display: inline; }

.recent-item small {
  font-size: 12px;
  color: var(--c-text-muted);
  white-space: nowrap;
  flex-shrink: 0;
}

/* ===== Topic 页 Hero ===== */
.topic-hero {
  position: relative;
  min-height: 160px;
  background: linear-gradient(135deg, var(--c-dark) 0%, #2d1848 100%);
  overflow: hidden;
  padding: 0;
}

.topic-hero-deco {
  position: absolute;
  top: 0; left: 0;
  width: 100%; height: 100%;
  pointer-events: none;
}

.topic-hero-inner {
  position: relative;
  z-index: 1;
  padding: 36px 48px 30px;
  max-width: 900px;
}

.topic-h1 {
  font-size: clamp(1.3rem, 2.5vw, 1.8rem);
  font-weight: 700;
  color: #fff;
  margin-bottom: 8px;
}

.topic-desc {
  font-size: 14px;
  color: rgba(232,223,245,0.75);
  line-height: 1.6;
  margin-top: 6px;
}

/* ===== 子页列表 ===== */
.children-section { margin-bottom: 40px; }

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

.child-item {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 14px 0;
  border-bottom: 1px solid var(--c-border);
}

.child-item:last-child { border-bottom: none; }

.child-item a {
  font-size: 15px;
  color: var(--c-text);
  font-weight: 500;
  transition: color var(--transition);
  display: flex;
  align-items: center;
  gap: 6px;
  min-height: 28px;
}

.child-item a::before {
  content: '';
  display: inline-block;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--c-primary);
  flex-shrink: 0;
}

.child-item a:hover { color: var(--c-primary); }
.child-item a span { flex: 1; }

.child-item small {
  font-size: 12px;
  color: var(--c-text-muted);
  padding-left: 14px;
  line-height: 1.4;
}

/* ===== Article 页 ===== */
.article-header-section {
  display: flex;
  align-items: flex-start;
  gap: 24px;
  margin-bottom: 32px;
  background: var(--c-surface);
  border-radius: var(--radius-lg);
  padding: 28px;
  box-shadow: var(--shadow-soft);
}

.article-header-deco { flex-shrink: 0; opacity: 0.8; }

.article-header-text { flex: 1; }

.breadcrumb {
  font-size: 13px;
  color: var(--c-text-muted);
  margin-bottom: 8px;
}

.breadcrumb a { color: var(--c-primary); }
.breadcrumb a:hover { text-decoration: underline; }
.breadcrumb a span { display: inline; }

.article-h1 {
  font-size: clamp(1.2rem, 2.5vw, 1.7rem);
  font-weight: 700;
  color: var(--c-dark);
  line-height: 1.35;
  margin-bottom: 10px;
}

.article-meta {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 10px;
}

.article-date, .article-date-mod {
  font-size: 12px;
  color: var(--c-text-muted);
  background: var(--c-primary-pale);
  padding: 3px 10px;
  border-radius: 20px;
}

.article-desc {
  font-size: 14px;
  color: var(--c-text-muted);
  line-height: 1.6;
}

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

/* ===== About 页 ===== */
.about-header-section {
  display: flex;
  align-items: center;
  gap: 28px;
  margin-bottom: 32px;
  padding: 32px;
  background: linear-gradient(135deg, var(--c-primary-pale), var(--c-secondary-pale));
  border-radius: var(--radius-lg);
}

.about-hero-fig { flex-shrink: 0; }

.about-h1 {
  font-size: clamp(1.2rem, 2.5vw, 1.7rem);
  font-weight: 700;
  color: var(--c-dark);
  margin-bottom: 10px;
}

.about-desc {
  font-size: 15px;
  color: var(--c-text-muted);
  line-height: 1.6;
}

.aside-contact { margin-top: 16px; }

/* ===== Privacy 页 ===== */
.privacy-header-section {
  display: flex;
  align-items: center;
  gap: 24px;
  margin-bottom: 28px;
  padding: 28px;
  background: var(--c-surface);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
}

.privacy-deco { flex-shrink: 0; }

.privacy-h1 {
  font-size: clamp(1.2rem, 2.5vw, 1.7rem);
  font-weight: 700;
  color: var(--c-dark);
  margin-bottom: 8px;
}

.page-date {
  display: inline-block;
  font-size: 12px;
  color: var(--c-text-muted);
  background: var(--c-primary-pale);
  padding: 3px 10px;
  border-radius: 20px;
  margin-bottom: 8px;
}

.privacy-desc {
  font-size: 14px;
  color: var(--c-text-muted);
  line-height: 1.6;
  margin-top: 6px;
}

/* ===== 页脚 ===== */
footer {
  background: var(--c-dark);
  margin-top: auto;
}

footer > section { display: block; }

.footer-brand-section {
  padding: 28px 48px 10px;
  border-bottom: 1px solid rgba(139,94,171,0.2);
}

.footer-big-brand {
  font-size: clamp(1.4rem, 4vw, 2.5rem);
  font-weight: 700;
  color: rgba(232,223,245,0.12);
  letter-spacing: 0.06em;
  user-select: none;
  display: block;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.footer-copy-section {
  padding: 14px 48px 20px;
  display: flex;
  align-items: center;
  gap: 20px;
  flex-wrap: wrap;
}

.footer-copy-section span {
  font-size: 12px;
  color: rgba(232,223,245,0.45);
}

.footer-copy-section a {
  font-size: 12px;
  color: rgba(232,223,245,0.55);
  transition: color var(--transition);
  min-height: 32px;
  display: inline-flex;
  align-items: center;
}

.footer-copy-section a:hover { color: #fff; }

/* ===== 日期标签（topic/div用）===== */
.page-date { display: inline-block; margin-bottom: 8px; }

/* ===== Scrollbar 美化 ===== */
.sidebar-nav::-webkit-scrollbar { width: 4px; }
.sidebar-nav::-webkit-scrollbar-track { background: transparent; }
.sidebar-nav::-webkit-scrollbar-thumb { background: rgba(139,94,171,0.3); border-radius: 4px; }

/* ===== 动效 ===== */
@media (prefers-reduced-motion: no-preference) {
  .topic-card { transition: transform 0.22s ease, box-shadow 0.22s ease; }
  .btn-primary { transition: background 0.22s ease, transform 0.22s ease, box-shadow 0.22s ease; }
  .hero-icon { animation: hero-float 4s ease-in-out infinite; }
  .sidebar-nav > ol > li > a { transition: background 0.18s ease, color 0.18s ease, padding-left 0.18s ease; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition: none !important; }
}

/* ===== 响应式 ===== */
@media (max-width: 900px) {
  :root { --sidebar-w: 0px; }

  .sidebar-nav {
    transform: translateX(-100%);
    transition: transform 0.28s ease;
    width: 240px;
    box-shadow: 4px 0 24px rgba(31,23,38,0.5);
  }

  .sidebar-nav.is-open {
    transform: translateX(0);
  }

  .nav-toggle {
    display: flex;
  }

  .main-content {
    margin-left: 0;
  }

  .hero-section {
    min-height: 45vh;
    padding: 56px 24px 32px;
  }

  .hero-inner {
    flex-direction: column;
    align-items: flex-end;
    gap: 20px;
  }

  .hero-icon { display: none; }

  .hero-sub { max-width: 100%; }

  main {
    padding: 28px 20px 24px;
  }

  .home-prose-section,
  .topic-body-section,
  .article-body-section,
  .about-body-section,
  .privacy-body-section {
    flex-direction: column;
    gap: 20px;
  }

  .home-aside,
  .topic-aside,
  .article-aside,
  .about-aside,
  .privacy-aside {
    width: 100%;
  }

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

  .article-header-section {
    flex-direction: column;
    gap: 16px;
    padding: 20px;
  }

  .about-header-section {
    flex-direction: column;
    padding: 20px;
  }

  .footer-brand-section { padding: 20px 20px 8px; }
  .footer-copy-section { padding: 10px 20px 16px; }
}

@media (max-width: 480px) {
  .hero-cta-row { flex-direction: column; align-items: flex-end; }
  .topic-cards-grid { grid-template-columns: 1fr; }
  .hero-section { padding: 60px 16px 28px; }
  main { padding: 20px 16px 20px; }
  .recent-item { flex-direction: column; align-items: flex-start; gap: 4px; }
  .recent-item small { white-space: normal; }
}

/* ===== 遮罩（移动端导航打开时）===== */
.nav-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.5);
  z-index: 190;
}

.nav-overlay.is-active { display: block; }