@import url('https://fonts.googleapis.com/css2?family=Plus+Jakarta+Sans:ital,wght@0,400;0,500;0,700;1,400&display=swap');

/* ===== 全局变量与重置 ===== */
:root {
  --c-white: #ffffff;
  --c-surface: #f5f5f5;
  --c-ink: #1f1f1f;
  --c-ink-60: rgba(31,31,31,0.6);
  --c-ink-30: rgba(31,31,31,0.3);
  --c-ink-10: rgba(31,31,31,0.08);
  --c-accent: #3d3d3d;
  --c-accent-light: #e8e8e8;

  --shadow-sm: 4px 4px 10px rgba(31,31,31,0.08), -2px -2px 6px rgba(255,255,255,0.9);
  --shadow-md: 8px 8px 20px rgba(31,31,31,0.12), -4px -4px 12px rgba(255,255,255,0.95);
  --shadow-lg: 12px 12px 32px rgba(31,31,31,0.16), -6px -6px 18px rgba(255,255,255,1);
  --shadow-xl: 20px 20px 48px rgba(31,31,31,0.2), -8px -8px 24px rgba(255,255,255,1);
  --shadow-inset: inset 3px 3px 8px rgba(31,31,31,0.1), inset -3px -3px 8px rgba(255,255,255,0.9);

  --radius-sm: 10px;
  --radius-md: 14px;
  --radius-lg: 18px;
  --radius-xl: 24px;

  --header-h: 64px;
  --aside-w: 260px;
  --font: 'Plus Jakarta Sans', system-ui, -apple-system, sans-serif;
  --max-prose: 720px;
  --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

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

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

body {
  font-family: var(--font);
  background: var(--c-surface);
  color: var(--c-ink);
  line-height: 1.7;
  overflow-x: hidden;
}

img { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; }
ul, ol { list-style: none; }
button { cursor: pointer; font-family: var(--font); }
input, button, select, textarea { font-family: var(--font); }

/* ===== 层级系统（Dimensional Layering） ===== */
.layer-1 {
  position: relative;
  z-index: 1;
  background: var(--c-surface);
  box-shadow: var(--shadow-sm);
}
.layer-2 {
  position: relative;
  z-index: 2;
  background: var(--c-white);
  box-shadow: var(--shadow-md);
}
.layer-3 {
  position: relative;
  z-index: 3;
  background: var(--c-white);
  box-shadow: var(--shadow-lg);
}
.layer-4 {
  position: relative;
  z-index: 4;
  background: var(--c-white);
  box-shadow: var(--shadow-xl);
}

/* ===== 页面骨架 ===== */
.page-wrapper {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* ===== 顶部 Header ===== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--header-h);
  border-radius: 0 0 var(--radius-md) var(--radius-md);
}

.header-inner {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 24px;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.header-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 1.05rem;
  color: var(--c-ink);
  flex-shrink: 0;
}

.brand-logo {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  object-fit: cover;
}

/* ===== 汉堡按钮 ===== */
.hamburger-btn {
  width: 44px;
  height: 44px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
  background: var(--c-surface);
  border: none;
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-sm);
  transition: box-shadow var(--transition);
  flex-shrink: 0;
}

.hamburger-btn:hover {
  box-shadow: var(--shadow-inset);
}

.hamburger-btn span {
  display: block;
  width: 20px;
  height: 2px;
  background: var(--c-ink);
  border-radius: 2px;
  transition: transform var(--transition), opacity var(--transition);
}

.hamburger-btn.is-open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.hamburger-btn.is-open span:nth-child(2) { opacity: 0; transform: scaleX(0); }
.hamburger-btn.is-open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ===== 全屏遮罩菜单 ===== */
.fullscreen-overlay {
  position: fixed;
  inset: 0;
  z-index: 200;
  background: rgba(31,31,31,0.96);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transform: translateY(-20px);
  transition: opacity var(--transition), transform var(--transition);
}

.fullscreen-overlay.is-open {
  opacity: 1;
  pointer-events: all;
  transform: translateY(0);
}

.overlay-close {
  position: absolute;
  top: 24px;
  right: 24px;
  width: 44px;
  height: 44px;
  background: rgba(255,255,255,0.1);
  border: none;
  border-radius: 50%;
  color: #fff;
  font-size: 1.2rem;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background var(--transition);
}

.overlay-close:hover { background: rgba(255,255,255,0.2); }

.overlay-nav-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
  text-align: center;
  padding: 20px;
  width: 100%;
  max-width: 520px;
}

.overlay-nav-list li a {
  display: block;
  padding: 14px 24px;
  color: #fff;
  font-size: 1.1rem;
  font-weight: 500;
  border-radius: var(--radius-md);
  transition: background var(--transition);
  line-height: 1.4;
}

.overlay-nav-list li a:hover,
.overlay-nav-list li a[aria-current="page"] {
  background: rgba(255,255,255,0.12);
}

/* ===== 侧边 Aside（桌面隐藏，抽签结构使用） ===== */
.site-aside {
  display: none;
}

@media (min-width: 1100px) {
  .site-aside {
    display: block;
    position: fixed;
    left: 0;
    top: var(--header-h);
    width: var(--aside-w);
    height: calc(100vh - var(--header-h));
    overflow-y: auto;
    z-index: 50;
    background: var(--c-white);
    box-shadow: var(--shadow-md);
    padding: 28px 20px;
  }

  .page-main {
    margin-left: var(--aside-w);
  }

  .site-footer {
    margin-left: var(--aside-w);
  }
}

.aside-inner { display: flex; flex-direction: column; gap: 24px; }

.aside-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 0.95rem;
  color: var(--c-ink);
}

.aside-brand-name { line-height: 1.3; }

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

.aside-nav li a {
  display: block;
  padding: 10px 14px;
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  color: var(--c-ink-60);
  transition: all var(--transition);
  line-height: 1.4;
}

.aside-nav li a:hover,
.aside-nav li a[aria-current="page"] {
  background: var(--c-surface);
  color: var(--c-ink);
  box-shadow: var(--shadow-sm);
}

/* ===== 搜索框 ===== */
.aside-search .search-form,
.search-form {
  display: flex;
  gap: 6px;
}

.aside-search .search-form input,
.search-form input {
  flex: 1;
  padding: 8px 12px;
  border: none;
  border-radius: var(--radius-sm);
  background: var(--c-surface);
  box-shadow: var(--shadow-inset);
  font-size: 0.875rem;
  color: var(--c-ink);
  outline: none;
  transition: box-shadow var(--transition);
  min-width: 0;
}

.aside-search .search-form input:focus,
.search-form input:focus {
  box-shadow: var(--shadow-sm), 0 0 0 2px var(--c-ink-30);
}

.aside-search .search-form button,
.search-form button {
  padding: 8px 12px;
  border: none;
  border-radius: var(--radius-sm);
  background: var(--c-ink);
  color: #fff;
  font-size: 0.8rem;
  font-weight: 600;
  box-shadow: var(--shadow-sm);
  transition: all var(--transition);
  white-space: nowrap;
  min-height: 40px;
}

.aside-search .search-form button:hover,
.search-form button:hover {
  background: var(--c-accent);
  box-shadow: var(--shadow-md);
}

/* ===== Hero 通用 ===== */
.hero-band {
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, var(--c-ink) 0%, var(--c-accent) 60%, var(--c-surface) 100%);
  clip-path: polygon(0 0, 100% 0, 100% 78%, 0 100%);
  z-index: 0;
}

.hero-band--accent {
  background: linear-gradient(135deg, var(--c-accent) 0%, #555 60%, var(--c-surface) 100%);
}

.hero-band--soft {
  background: linear-gradient(135deg, var(--c-surface) 0%, var(--c-accent-light) 60%, var(--c-white) 100%);
}

/* ===== 首页 Hero ===== */
.home-hero {
  position: relative;
  min-height: 45vh;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  border-radius: 0 0 var(--radius-xl) var(--radius-xl);
  margin-bottom: 48px;
}

.hero-fig {
  position: absolute;
  inset: 0;
  z-index: 0;
}

.hero-bg-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.15;
}

.hero-slant {
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, var(--c-ink) 0%, var(--c-accent) 55%, transparent 100%);
  clip-path: polygon(0 0, 100% 0, 100% 80%, 0 100%);
  z-index: 1;
}

.hero-content {
  position: relative;
  text-align: center;
  padding: 60px 24px 80px;
  max-width: 800px;
  z-index: 3;
}

.hero-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 16px;
}

.hero-eyebrow span {
  display: inline-block;
  padding: 4px 14px;
  background: rgba(255,255,255,0.15);
  border-radius: 100px;
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  color: rgba(255,255,255,0.9);
  backdrop-filter: blur(8px);
}

.hero-content h1 {
  font-size: clamp(1.75rem, 5vw, 3rem);
  font-weight: 700;
  color: #fff;
  line-height: 1.25;
  margin-bottom: 16px;
  text-shadow: 0 2px 12px rgba(0,0,0,0.3);
}

.hero-sub {
  font-size: 1rem;
  color: rgba(255,255,255,0.8);
  max-width: 560px;
  margin: 0 auto 28px;
  line-height: 1.7;
}

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

/* ===== 按钮 ===== */
.btn-primary {
  display: inline-block;
  padding: 12px 28px;
  background: var(--c-white);
  color: var(--c-ink);
  border-radius: var(--radius-md);
  font-weight: 700;
  font-size: 0.95rem;
  box-shadow: var(--shadow-md);
  transition: all var(--transition);
  min-height: 44px;
  line-height: 1.4;
}

.btn-primary:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-2px);
}

.btn-ghost {
  display: inline-block;
  padding: 12px 28px;
  background: rgba(255,255,255,0.15);
  color: #fff;
  border-radius: var(--radius-md);
  font-weight: 600;
  font-size: 0.95rem;
  border: 1px solid rgba(255,255,255,0.3);
  backdrop-filter: blur(8px);
  transition: all var(--transition);
  min-height: 44px;
  line-height: 1.4;
}

.btn-ghost:hover {
  background: rgba(255,255,255,0.25);
}

.btn-outline {
  display: inline-block;
  padding: 10px 24px;
  background: var(--c-surface);
  color: var(--c-ink);
  border-radius: var(--radius-md);
  font-weight: 600;
  font-size: 0.9rem;
  box-shadow: var(--shadow-sm);
  transition: all var(--transition);
  min-height: 40px;
  line-height: 1.4;
}

.btn-outline:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-1px);
}

/* ===== 首页分区通用 ===== */
.home-main > section { padding: 0 24px; }

.section-header {
  margin-bottom: 32px;
  text-align: center;
}

.section-header h2 {
  font-size: clamp(1.4rem, 3vw, 2rem);
  font-weight: 700;
  margin-bottom: 8px;
}

.section-header h2 span { display: inline; }

.section-header p {
  color: var(--c-ink-60);
  font-size: 0.95rem;
}

.section-more {
  margin-top: 32px;
  text-align: center;
}

/* ===== 首页 Intro ===== */
.home-intro-section {
  max-width: 1200px;
  margin: 0 auto 56px;
  display: grid;
  grid-template-columns: 220px 1fr;
  gap: 32px;
  align-items: start;
  padding: 0 24px;
}

.home-aside {
  border-radius: var(--radius-lg);
  padding: 24px 20px;
  position: sticky;
  top: calc(var(--header-h) + 16px);
}

.quick-nav-list { display: flex; flex-direction: column; gap: 6px; margin-top: 12px; }

.quick-nav-list li a {
  display: block;
  padding: 8px 12px;
  border-radius: var(--radius-sm);
  font-size: 0.875rem;
  color: var(--c-ink-60);
  transition: all var(--transition);
  line-height: 1.4;
}

.quick-nav-list li a:hover {
  color: var(--c-ink);
  background: var(--c-surface);
  box-shadow: var(--shadow-sm);
}

/* ===== 分类卡片网格 ===== */
.home-categories-section {
  max-width: 1200px;
  margin: 0 auto 56px;
}

.cat-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 20px;
}

.cat-card {
  border-radius: var(--radius-lg);
  transition: all var(--transition);
}

.cat-card a {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 28px 24px;
  min-height: 160px;
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.cat-card:hover {
  box-shadow: var(--shadow-xl);
  transform: translateY(-4px) translateZ(8px);
}

.cat-eyebrow {
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--c-ink-60);
  text-transform: uppercase;
}

.cat-title {
  font-size: 1.1rem;
  font-weight: 700;
  line-height: 1.3;
  color: var(--c-ink);
}

.cat-title span { display: inline; }

.cat-desc {
  font-size: 0.875rem;
  color: var(--c-ink-60);
  line-height: 1.6;
  flex: 1;
}

.cat-arrow {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--c-ink-60);
  margin-top: 4px;
  transition: color var(--transition);
}

.cat-card:hover .cat-arrow { color: var(--c-ink); }

/* ===== 文章卡片网格 ===== */
.home-articles-section {
  max-width: 1200px;
  margin: 0 auto 56px;
}

.art-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 20px;
}

.art-card {
  border-radius: var(--radius-lg);
  transition: all var(--transition);
}

.art-card > a {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  padding: 24px;
  min-height: 140px;
  border-radius: var(--radius-lg);
}

.art-card:hover {
  box-shadow: var(--shadow-xl);
  transform: translateY(-3px);
}

.art-card-body {
  display: flex;
  gap: 16px;
  align-items: flex-start;
}

.art-num {
  font-size: 2rem;
  font-weight: 700;
  color: var(--c-ink-10);
  line-height: 1;
  flex-shrink: 0;
  min-width: 48px;
  font-variant-numeric: tabular-nums;
}

.art-card-text h3 {
  font-size: 1rem;
  font-weight: 600;
  line-height: 1.4;
  color: var(--c-ink);
  margin-bottom: 6px;
}

.art-card-text h3 span { display: inline; }

.art-card-text p {
  font-size: 0.85rem;
  color: var(--c-ink-60);
  line-height: 1.6;
}

.art-date {
  font-size: 0.78rem;
  color: var(--c-ink-30);
  margin-top: 12px;
  display: block;
}

/* ===== Article Hero ===== */
.article-hero {
  position: relative;
  min-height: 45vh;
  display: flex;
  align-items: flex-end;
  overflow: hidden;
  border-radius: 0 0 var(--radius-xl) var(--radius-xl);
  margin-bottom: 40px;
}

.article-hero-fig {
  position: absolute;
  inset: 0;
  z-index: 0;
}

.article-hero-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.12;
}

.article-hero-text {
  position: relative;
  z-index: 2;
  padding: 48px 32px 40px;
  max-width: 900px;
  width: 100%;
  color: #fff;
}

.article-hero-text h1 {
  font-size: clamp(1.5rem, 4vw, 2.5rem);
  font-weight: 700;
  line-height: 1.25;
  margin-bottom: 16px;
  text-shadow: 0 2px 8px rgba(0,0,0,0.4);
}

.article-meta {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  font-size: 0.85rem;
  color: rgba(255,255,255,0.7);
}

.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  align-items: center;
  font-size: 0.8rem;
  color: rgba(255,255,255,0.7);
  margin-bottom: 16px;
}

.breadcrumb a { color: rgba(255,255,255,0.8); }
.breadcrumb a:hover { color: #fff; }

.breadcrumb-link {
  color: rgba(255,255,255,0.8);
  font-size: 0.85rem;
}

/* ===== 文章正文区 ===== */
.article-body-section {
  padding: 0 24px 64px;
  max-width: 1200px;
  margin: 0 auto;
}

.article-content-wrap {
  display: grid;
  grid-template-columns: 1fr 300px;
  gap: 32px;
  align-items: start;
}

.article-content {
  border-radius: var(--radius-lg);
  padding: 40px 44px;
}

.article-aside {
  border-radius: var(--radius-lg);
  padding: 28px 24px;
  position: sticky;
  top: calc(var(--header-h) + 16px);
  display: flex;
  flex-direction: column;
  gap: 28px;
}

/* ===== 相关卡片 ===== */
.rel-cards { display: flex; flex-direction: column; gap: 12px; }

.rel-card {
  border-radius: var(--radius-md);
  transition: all var(--transition);
}

.rel-card a {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 16px;
  border-radius: var(--radius-md);
}

.rel-card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-2px);
}

.rel-label {
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--c-ink-30);
  text-transform: uppercase;
}

.rel-card strong {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--c-ink);
  line-height: 1.4;
  display: block;
}

.rel-card p {
  font-size: 0.8rem;
  color: var(--c-ink-60);
  line-height: 1.5;
}

.rel-card time {
  font-size: 0.75rem;
  color: var(--c-ink-30);
}

/* ===== 侧边快速导航 ===== */
.aside-sec-title {
  font-size: 0.9rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--c-ink-60);
  margin-bottom: 12px;
}

.aside-sec-title span { display: inline; }

.nav-quicklinks h3 {
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--c-ink-60);
  margin-bottom: 10px;
}

.nav-quicklinks h3 span { display: inline; }

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

.nav-quicklinks li a {
  display: block;
  padding: 8px 12px;
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  color: var(--c-ink-60);
  transition: all var(--transition);
  min-height: 40px;
  display: flex;
  align-items: center;
  line-height: 1.4;
}

.nav-quicklinks li a:hover {
  color: var(--c-ink);
  background: var(--c-surface);
  box-shadow: var(--shadow-sm);
}

/* ===== 栏目页 ===== */
.cat-hero {
  position: relative;
  min-height: 40vh;
  display: flex;
  align-items: flex-end;
  overflow: hidden;
  border-radius: 0 0 var(--radius-xl) var(--radius-xl);
  margin-bottom: 40px;
}

.cat-hero-fig {
  position: absolute;
  inset: 0;
  z-index: 0;
}

.cat-hero-text {
  position: relative;
  z-index: 2;
  padding: 40px 32px 36px;
  color: #fff;
  max-width: 760px;
}

.cat-hero-text h1 {
  font-size: clamp(1.5rem, 4vw, 2.4rem);
  font-weight: 700;
  line-height: 1.25;
  margin: 10px 0;
  text-shadow: 0 2px 8px rgba(0,0,0,0.4);
}

.cat-hero-desc {
  font-size: 0.95rem;
  color: rgba(255,255,255,0.75);
  line-height: 1.6;
}

.cat-content-section {
  padding: 0 24px 48px;
  max-width: 1200px;
  margin: 0 auto;
}

.cat-content-wrap {
  display: grid;
  grid-template-columns: 1fr 280px;
  gap: 32px;
}

.cat-intro {
  border-radius: var(--radius-lg);
  padding: 36px 40px;
}

.cat-sidebar {
  border-radius: var(--radius-lg);
  padding: 28px 22px;
  position: sticky;
  top: calc(var(--header-h) + 16px);
  display: flex;
  flex-direction: column;
  gap: 28px;
}

/* ===== 子页 table ===== */
.cat-children-section {
  padding: 0 24px 64px;
  max-width: 1200px;
  margin: 0 auto;
}

.children-table-wrap {
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.children-table {
  width: 100%;
  border-collapse: collapse;
}

.children-table thead th {
  padding: 16px 20px;
  text-align: left;
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--c-ink-60);
  background: var(--c-surface);
  border-bottom: 1px solid var(--c-ink-10);
}

.children-table tbody .child-row {
  border-bottom: 1px solid var(--c-ink-10);
  transition: background var(--transition);
}

.children-table tbody .child-row:hover { background: var(--c-surface); }
.children-table tbody .child-row:last-child { border-bottom: none; }

.children-table td {
  padding: 18px 20px;
  vertical-align: middle;
}

.child-num {
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--c-ink-10);
  width: 60px;
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}

.child-title-cell a {
  font-size: 1rem;
  font-weight: 600;
  color: var(--c-ink);
  display: block;
  margin-bottom: 4px;
  transition: color var(--transition);
  line-height: 1.4;
}

.child-title-cell a:hover { color: var(--c-accent); }

.child-desc {
  font-size: 0.85rem;
  color: var(--c-ink-60);
  line-height: 1.5;
  margin-top: 4px;
}

.child-date-cell {
  font-size: 0.8rem;
  color: var(--c-ink-30);
  white-space: nowrap;
  text-align: right;
}

/* ===== 兄弟分类卡片 ===== */
.sib-cards { display: flex; flex-direction: column; gap: 10px; }

.sib-card {
  border-radius: var(--radius-md);
  transition: all var(--transition);
}

.sib-card a {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 16px;
  border-radius: var(--radius-md);
}

.sib-card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-2px);
}

.sib-card strong {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--c-ink);
  line-height: 1.4;
}

.sib-card p {
  font-size: 0.8rem;
  color: var(--c-ink-60);
  line-height: 1.5;
}

/* ===== About 页 ===== */
.about-hero {
  position: relative;
  min-height: 38vh;
  display: flex;
  align-items: flex-end;
  overflow: hidden;
  border-radius: 0 0 var(--radius-xl) var(--radius-xl);
  margin-bottom: 40px;
}

.about-hero-fig {
  position: absolute;
  inset: 0;
  z-index: 0;
}

.about-hero-text {
  position: relative;
  z-index: 2;
  padding: 40px 32px 36px;
  color: #fff;
  max-width: 720px;
}

.about-hero-text h1 {
  font-size: clamp(1.5rem, 4vw, 2.4rem);
  font-weight: 700;
  margin: 10px 0;
  text-shadow: 0 2px 8px rgba(0,0,0,0.4);
}

.about-body-section {
  padding: 0 24px 64px;
  max-width: 1200px;
  margin: 0 auto;
}

.about-content-wrap {
  display: grid;
  grid-template-columns: 1fr 280px;
  gap: 32px;
}

.about-content {
  border-radius: var(--radius-lg);
  padding: 36px 40px;
}

.about-aside {
  border-radius: var(--radius-lg);
  padding: 28px 22px;
  position: sticky;
  top: calc(var(--header-h) + 16px);
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.about-meta-list {
  font-size: 0.875rem;
  line-height: 1.6;
}

.about-meta-list dt {
  font-weight: 700;
  color: var(--c-ink-60);
  font-size: 0.78rem;
  letter-spacing: 0.06em;
  margin-top: 12px;
}

.about-meta-list dt:first-child { margin-top: 0; }

.about-meta-list dd {
  color: var(--c-ink);
}

.about-policy-link { margin-top: 8px; }

/* ===== Privacy 页 ===== */
.privacy-hero {
  position: relative;
  min-height: 32vh;
  display: flex;
  align-items: flex-end;
  overflow: hidden;
  border-radius: 0 0 var(--radius-xl) var(--radius-xl);
  margin-bottom: 40px;
}

.privacy-hero-fig {
  position: absolute;
  inset: 0;
  z-index: 0;
  background: var(--c-surface);
}

.privacy-hero-text {
  position: relative;
  z-index: 2;
  padding: 40px 32px 36px;
  color: var(--c-ink);
}

.privacy-hero-text h1 {
  font-size: clamp(1.4rem, 3.5vw, 2.2rem);
  font-weight: 700;
  margin: 10px 0 8px;
}

.privacy-hero-text time {
  font-size: 0.85rem;
  color: var(--c-ink-60);
}

.privacy-body-section {
  padding: 0 24px 64px;
  max-width: 1200px;
  margin: 0 auto;
}

.privacy-content-wrap {
  display: grid;
  grid-template-columns: 1fr 260px;
  gap: 32px;
}

.privacy-content {
  border-radius: var(--radius-lg);
  padding: 36px 40px;
}

.privacy-aside {
  border-radius: var(--radius-lg);
  padding: 28px 22px;
  position: sticky;
  top: calc(var(--header-h) + 16px);
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.privacy-links { display: flex; flex-direction: column; gap: 4px; }

.privacy-links li a {
  display: block;
  padding: 9px 12px;
  border-radius: var(--radius-sm);
  font-size: 0.875rem;
  color: var(--c-ink-60);
  transition: all var(--transition);
  min-height: 40px;
  display: flex;
  align-items: center;
}

.privacy-links li a:hover {
  color: var(--c-ink);
  background: var(--c-surface);
  box-shadow: var(--shadow-sm);
}

.privacy-note {
  border-radius: var(--radius-md);
  padding: 16px;
}

.privacy-note h3 {
  font-size: 0.85rem;
  font-weight: 700;
  margin-bottom: 8px;
  color: var(--c-ink-60);
}

.privacy-note h3 span { display: inline; }

.privacy-note p {
  font-size: 0.825rem;
  color: var(--c-ink-60);
  line-height: 1.6;
}

/* ===== Prose 正文样式 ===== */
.prose {
  font-size: 1rem;
  line-height: 1.8;
  color: var(--c-ink);
}

.prose h2 {
  font-size: 1.4rem;
  font-weight: 700;
  margin: 2em 0 0.75em;
  line-height: 1.3;
}

.prose h2 span { display: inline; }

.prose h3 {
  font-size: 1.15rem;
  font-weight: 700;
  margin: 1.8em 0 0.6em;
}

.prose h3 span { display: inline; }

.prose p { margin-bottom: 1.2em; }

.prose ul, .prose ol {
  margin: 1em 0 1.2em 1.5em;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

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

.prose li { line-height: 1.7; }

.prose a {
  color: var(--c-ink);
  text-decoration: underline;
  text-underline-offset: 3px;
  transition: opacity var(--transition);
}

.prose a:hover { opacity: 0.7; }

.prose strong { font-weight: 700; }

.prose blockquote {
  border-left: 3px solid var(--c-ink-30);
  padding: 12px 20px;
  margin: 1.5em 0;
  background: var(--c-surface);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  font-style: italic;
  color: var(--c-ink-60);
}

.prose code {
  background: var(--c-surface);
  padding: 2px 6px;
  border-radius: 4px;
  font-size: 0.875em;
  font-family: 'Courier New', monospace;
  box-shadow: var(--shadow-inset);
}

.prose pre {
  background: var(--c-ink);
  color: var(--c-surface);
  padding: 20px 24px;
  border-radius: var(--radius-md);
  overflow-x: auto;
  margin: 1.5em 0;
}

.prose pre code {
  background: none;
  box-shadow: none;
  color: inherit;
  padding: 0;
}

.prose img {
  border-radius: var(--radius-md);
  margin: 1.5em 0;
  box-shadow: var(--shadow-md);
}

.prose table {
  width: 100%;
  border-collapse: collapse;
  margin: 1.5em 0;
  font-size: 0.9rem;
}

.prose th {
  padding: 10px 14px;
  background: var(--c-surface);
  font-weight: 700;
  text-align: left;
  border-bottom: 2px solid var(--c-ink-10);
}

.prose td {
  padding: 10px 14px;
  border-bottom: 1px solid var(--c-ink-10);
}

/* ===== 页脚 ===== */
.site-footer {
  background: var(--c-ink);
  color: rgba(255,255,255,0.85);
  margin-top: auto;
}

.footer-top {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  padding: 56px 40px 40px;
  max-width: 1200px;
  margin: 0 auto;
  background: var(--c-ink);
  box-shadow: none;
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 14px;
}

.footer-brand strong {
  font-size: 1.1rem;
  font-weight: 700;
  color: #fff;
}

.footer-desc {
  font-size: 0.875rem;
  color: rgba(255,255,255,0.6);
  line-height: 1.7;
  margin-bottom: 16px;
}

.footer-top address {
  font-style: normal;
  font-size: 0.85rem;
  color: rgba(255,255,255,0.5);
}

.footer-top address a {
  color: rgba(255,255,255,0.7);
  transition: color var(--transition);
}

.footer-top address a:hover { color: #fff; }

.footer-links-col h4 {
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: rgba(255,255,255,0.4);
  margin-bottom: 16px;
}

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

.footer-links-col li a {
  font-size: 0.875rem;
  color: rgba(255,255,255,0.65);
  transition: color var(--transition);
  display: block;
  padding: 4px 0;
  min-height: 40px;
  display: flex;
  align-items: center;
}

.footer-links-col li a:hover { color: #fff; }

.footer-subscribe {
  background: rgba(255,255,255,0.06);
  padding: 28px 40px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  flex-wrap: wrap;
  max-width: 100%;
  box-shadow: none;
}

.footer-subscribe p {
  font-size: 0.9rem;
  color: rgba(255,255,255,0.65);
}

.subscribe-form {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.subscribe-form input {
  padding: 10px 16px;
  border: 1px solid rgba(255,255,255,0.2);
  border-radius: var(--radius-sm);
  background: rgba(255,255,255,0.08);
  color: #fff;
  font-size: 0.875rem;
  outline: none;
  transition: border-color var(--transition);
  min-width: 220px;
  min-height: 44px;
}

.subscribe-form input::placeholder { color: rgba(255,255,255,0.4); }
.subscribe-form input:focus { border-color: rgba(255,255,255,0.5); }

.subscribe-form button {
  padding: 10px 24px;
  border: none;
  border-radius: var(--radius-sm);
  background: #fff;
  color: var(--c-ink);
  font-weight: 700;
  font-size: 0.875rem;
  transition: all var(--transition);
  min-height: 44px;
}

.subscribe-form button:hover {
  background: var(--c-surface);
  transform: translateY(-1px);
}

.footer-bottom {
  padding: 20px 40px;
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
  border-top: 1px solid rgba(255,255,255,0.08);
}

.footer-bottom span {
  font-size: 0.8rem;
  color: rgba(255,255,255,0.35);
}

.footer-bottom-links {
  display: flex;
  gap: 20px;
}

.footer-bottom-links a {
  font-size: 0.8rem;
  color: rgba(255,255,255,0.4);
  transition: color var(--transition);
  min-height: 40px;
  display: flex;
  align-items: center;
}

.footer-bottom-links a:hover { color: rgba(255,255,255,0.8); }

/* ===== 日期 ===== */
.pub-date, .mod-date {
  font-size: 0.85rem;
  color: rgba(255,255,255,0.7);
}

/* ===== 其他工具 ===== */
.no-rel, .no-children {
  font-size: 0.875rem;
  color: var(--c-ink-30);
  padding: 12px 0;
}

/* ===== Scroll Reveal 动画 ===== */
@media (prefers-reduced-motion: no-preference) {
  .reveal-item {
    opacity: 0;
    transform: translateY(24px);
    transition: opacity 0.5s ease, transform 0.5s ease;
    transition-delay: var(--delay, 0ms);
  }

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

  .reveal-section .section-header {
    opacity: 0;
    transform: translateY(16px);
    transition: opacity 0.4s ease, transform 0.4s ease;
  }

  .reveal-section.is-visible .section-header {
    opacity: 1;
    transform: translateY(0);
  }

  .home-hero {
    transform-style: preserve-3d;
  }

  .hero-content {
    transform: translateZ(4px);
  }

  .layer-2 {
    transform: translateZ(2px);
  }

  .layer-3 {
    transform: translateZ(4px);
  }
}

/* ===== 响应式断点 ===== */
@media (max-width: 1100px) {
  .home-intro-section {
    grid-template-columns: 1fr;
  }

  .home-aside {
    position: static;
    display: grid;
    grid-template-columns: auto 1fr;
    gap: 16px;
    align-items: start;
  }

  .quick-nav-list {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
  }

  .article-content-wrap,
  .cat-content-wrap,
  .about-content-wrap,
  .privacy-content-wrap {
    grid-template-columns: 1fr;
  }

  .article-aside,
  .cat-sidebar,
  .about-aside,
  .privacy-aside {
    position: static;
  }

  .article-content,
  .cat-intro,
  .about-content,
  .privacy-content {
    padding: 28px 28px;
  }
}

@media (max-width: 768px) {
  .footer-top {
    grid-template-columns: 1fr;
    padding: 40px 24px 32px;
    gap: 32px;
  }

  .footer-subscribe {
    flex-direction: column;
    align-items: flex-start;
    padding: 24px;
  }

  .subscribe-form { width: 100%; }

  .subscribe-form input { min-width: 0; flex: 1; }

  .footer-bottom {
    padding: 16px 24px;
    flex-direction: column;
    align-items: flex-start;
    gap: 10px;
  }

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

  .cat-grid { grid-template-columns: repeat(auto-fill, minmax(200px, 1fr)); }

  .article-hero-text,
  .cat-hero-text,
  .about-hero-text,
  .privacy-hero-text {
    padding: 32px 20px 28px;
  }

  .hero-content { padding: 48px 20px 64px; }

  .article-body-section,
  .cat-content-section,
  .cat-children-section,
  .about-body-section,
  .privacy-body-section,
  .home-categories-section,
  .home-articles-section,
  .home-intro-section {
    padding-left: 16px;
    padding-right: 16px;
  }

  .children-table { font-size: 0.875rem; }
  .children-table td, .children-table th { padding: 12px 12px; }
  .child-num { font-size: 1.1rem; min-width: 40px; }

  .overlay-nav-list li a { font-size: 1rem; padding: 12px 20px; }
}

@media (max-width: 480px) {
  .hero-cta { flex-direction: column; align-items: center; }
  .btn-primary, .btn-ghost { width: 100%; max-width: 280px; text-align: center; }

  .article-content,
  .cat-intro,
  .about-content,
  .privacy-content {
    padding: 20px 18px;
  }

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

  .children-table-wrap { overflow-x: auto; }

  .home-main > section { padding: 0 16px; }
}