/* ========================================
   领袖工作方法·智慧与方法论完全指南
   庄重红金配色 + 宣纸质感底纹 + 革命历史档案风
   ======================================== */

/* ---------- 设计令牌 ---------- */
:root {
  --red-primary: #8B0000;
  --red-deep: #5C0000;
  --red-light: #C4151C;
  --gold-primary: #C9A227;
  --gold-light: #E0C25A;
  --gold-deep: #9B7D1A;
  --bg-paper: #F5F0E6;
  --bg-paper-dark: #EDE5D3;
  --bg-cream: #FAF6EE;
  --ink-black: #1A1A1A;
  --ink-deep: #2D2D2D;
  --ink-gray: #555;
  --ink-light: #888;
  --border-soft: #D4C9B0;
  --shadow-soft: 0 4px 20px rgba(139, 0, 0, 0.08);
  --shadow-medium: 0 8px 30px rgba(139, 0, 0, 0.12);
  --shadow-deep: 0 12px 50px rgba(0, 0, 0, 0.18);
  --radius-card: 22px;
  --radius-sm: 12px;
  --radius-xs: 8px;
  --container-width: 1100px;
  --font-cn: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", sans-serif;
  --font-serif: "Noto Serif SC", "SimSun", "Songti SC", serif;
}

/* ---------- Reset ---------- */
* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  font-family: var(--font-cn);
  background: var(--bg-paper);
  color: var(--ink-deep);
  line-height: 1.8;
  font-size: 16px;
  overflow-x: hidden;
}

/* 宣纸质感底纹 */
body::before {
  content: '';
  position: fixed;
  top: 0; left: 0; right: 0; bottom: 0;
  background-image: 
    radial-gradient(circle at 20% 50%, rgba(139, 0, 0, 0.02) 0%, transparent 50%),
    radial-gradient(circle at 80% 80%, rgba(201, 162, 39, 0.03) 0%, transparent 50%),
    repeating-linear-gradient(45deg, transparent, transparent 2px, rgba(0,0,0,0.008) 2px, rgba(0,0,0,0.008) 4px);
  pointer-events: none;
  z-index: 0;
}

a { color: var(--red-primary); text-decoration: none; transition: color 0.3s; }
a:hover { color: var(--red-light); }

/* ---------- 顶部导航栏 ---------- */
.navbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: 64px;
  background: rgba(92, 0, 0, 0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 2px 20px rgba(0, 0, 0, 0.15);
  border-bottom: 1px solid var(--gold-deep);
}
.navbar-inner {
  width: 100%;
  max-width: var(--container-width);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 24px;
}
.navbar-logo {
  font-family: var(--font-serif);
  font-size: 18px;
  font-weight: 700;
  color: var(--gold-light);
  letter-spacing: 2px;
  white-space: nowrap;
}
.navbar-logo span { color: rgba(255, 255, 255, 0.7); font-size: 13px; margin-left: 6px; letter-spacing: 1px; }
.navbar-links {
  display: flex;
  gap: 6px;
  align-items: center;
}
.navbar-links a {
  color: rgba(255, 255, 255, 0.8);
  font-size: 14px;
  padding: 6px 14px;
  border-radius: var(--radius-xs);
  transition: all 0.3s;
  white-space: nowrap;
}
.navbar-links a:hover {
  color: var(--gold-light);
  background: rgba(201, 162, 39, 0.15);
}
.navbar-links a.active {
  color: var(--gold-light);
  background: rgba(201, 162, 39, 0.18);
}

/* 移动端汉堡菜单 */
.navbar-toggle {
  display: none;
  flex-direction: column;
  gap: 4px;
  cursor: pointer;
  padding: 8px;
}
.navbar-toggle span {
  width: 22px; height: 2px;
  background: var(--gold-light);
  border-radius: 2px;
  transition: 0.3s;
}

/* ---------- Hero ---------- */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 80px 24px 60px;
  overflow: hidden;
}
.hero-bg {
  position: absolute;
  top: 0; left: 0; right: 0; bottom: 0;
  background: linear-gradient(135deg, var(--red-deep) 0%, var(--red-primary) 40%, var(--red-deep) 100%);
  z-index: -2;
}
.hero-bg::after {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0; bottom: 0;
  background: 
    radial-gradient(circle at 30% 40%, rgba(201, 162, 39, 0.12) 0%, transparent 60%),
    radial-gradient(circle at 70% 60%, rgba(201, 162, 39, 0.08) 0%, transparent 50%);
}
.hero-bg::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0; bottom: 0;
  background-image: repeating-linear-gradient(90deg, transparent, transparent 60px, rgba(201, 162, 39, 0.04) 60px, rgba(201, 162, 39, 0.04) 61px);
}
.hero-content {
  max-width: 800px;
  z-index: 1;
}
.hero-eyebrow {
  font-size: 14px;
  letter-spacing: 8px;
  color: var(--gold-light);
  margin-bottom: 20px;
  opacity: 0;
  animation: fadeInUp 0.8s 0.2s forwards;
}
.hero-title {
  font-family: var(--font-serif);
  font-size: clamp(36px, 6vw, 60px);
  font-weight: 800;
  color: #fff;
  line-height: 1.3;
  margin-bottom: 16px;
  text-shadow: 0 4px 30px rgba(0, 0, 0, 0.4);
  opacity: 0;
  animation: fadeInUp 0.8s 0.4s forwards;
}
.hero-subtitle {
  font-size: clamp(15px, 2.5vw, 18px);
  color: rgba(255, 255, 255, 0.75);
  line-height: 1.8;
  margin-bottom: 40px;
  opacity: 0;
  animation: fadeInUp 0.8s 0.6s forwards;
}
.hero-stats {
  display: flex;
  justify-content: center;
  gap: 40px;
  flex-wrap: wrap;
  opacity: 0;
  animation: fadeInUp 0.8s 0.8s forwards;
}
.hero-stat {
  text-align: center;
}
.hero-stat-num {
  font-family: var(--font-serif);
  font-size: 36px;
  font-weight: 700;
  color: var(--gold-light);
}
.hero-stat-label {
  font-size: 13px;
  color: rgba(255, 255, 255, 0.6);
  margin-top: 4px;
}
.hero-scroll {
  position: absolute;
  bottom: 30px;
  left: 50%;
  transform: translateX(-50%);
  color: rgba(255, 255, 255, 0.5);
  font-size: 24px;
  animation: bounce 2s infinite;
}

@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(30px); }
  to { opacity: 1; transform: translateY(0); }
}
@keyframes bounce {
  0%, 100% { transform: translateX(-50%) translateY(0); }
  50% { transform: translateX(-50%) translateY(-10px); }
}

/* ---------- 通用 Section ---------- */
.section {
  position: relative;
  padding: 80px 24px;
  z-index: 1;
}
.section-inner {
  max-width: var(--container-width);
  margin: 0 auto;
}
.section-header {
  text-align: center;
  margin-bottom: 56px;
}
.section-tag {
  display: inline-block;
  font-size: 13px;
  letter-spacing: 4px;
  color: var(--gold-deep);
  padding: 4px 16px;
  border: 1px solid var(--border-soft);
  border-radius: 100px;
  margin-bottom: 16px;
}
.section-title {
  font-family: var(--font-serif);
  font-size: clamp(28px, 4vw, 40px);
  font-weight: 700;
  color: var(--red-deep);
  margin-bottom: 12px;
}
.section-desc {
  font-size: 15px;
  color: var(--ink-gray);
  max-width: 600px;
  margin: 0 auto;
  line-height: 1.8;
}

/* ---------- 章节目录卡片 ---------- */
.chapter-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.chapter-card {
  background: var(--bg-cream);
  border-radius: var(--radius-card);
  padding: 32px 28px;
  box-shadow: var(--shadow-soft);
  border: 1px solid var(--border-soft);
  transition: all 0.4s;
  cursor: pointer;
  display: flex;
  flex-direction: column;
  min-height: 240px;
}
.chapter-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-medium);
  border-color: var(--gold-primary);
}
.chapter-card-num {
  font-family: var(--font-serif);
  font-size: 14px;
  color: var(--gold-deep);
  letter-spacing: 2px;
  margin-bottom: 8px;
}
.chapter-card-title {
  font-family: var(--font-serif);
  font-size: 20px;
  font-weight: 700;
  color: var(--red-deep);
  margin-bottom: 10px;
}
.chapter-card-desc {
  font-size: 14px;
  color: var(--ink-gray);
  line-height: 1.8;
  flex: 1;
}
.chapter-card-arrow {
  margin-top: 16px;
  font-size: 13px;
  color: var(--red-primary);
  font-weight: 600;
}

/* ---------- 人物墙 ---------- */
.leader-wall {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.leader-card {
  background: var(--bg-cream);
  border-radius: var(--radius-card);
  overflow: hidden;
  box-shadow: var(--shadow-soft);
  border: 1px solid var(--border-soft);
  transition: all 0.4s;
}
.leader-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-medium);
}
.leader-card-img {
  width: 100%;
  aspect-ratio: 4 / 3;
  background: linear-gradient(135deg, var(--red-deep), var(--red-primary));
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
}
.leader-card-img::after {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at center, transparent 40%, rgba(0,0,0,0.15) 100%);
}
.leader-card-initial {
  font-family: var(--font-serif);
  font-size: 56px;
  font-weight: 800;
  color: var(--gold-light);
  z-index: 1;
}
.leader-card-body {
  padding: 24px;
}
.leader-card-name {
  font-family: var(--font-serif);
  font-size: 20px;
  font-weight: 700;
  color: var(--red-deep);
  margin-bottom: 4px;
}
.leader-card-role {
  font-size: 13px;
  color: var(--gold-deep);
  margin-bottom: 12px;
}
.leader-card-desc {
  font-size: 14px;
  color: var(--ink-gray);
  line-height: 1.8;
}
.leader-card-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 12px;
}
.leader-card-tag {
  font-size: 12px;
  padding: 3px 10px;
  border-radius: 100px;
  background: rgba(139, 0, 0, 0.06);
  color: var(--red-primary);
}

/* ---------- 内容篇章 ---------- */
.chapter {
  margin-bottom: 60px;
}
.chapter-banner {
  background: linear-gradient(135deg, var(--red-deep), var(--red-primary));
  border-radius: var(--radius-card);
  padding: 40px 36px;
  margin-bottom: 32px;
  position: relative;
  overflow: hidden;
}
.chapter-banner::after {
  content: '';
  position: absolute;
  top: 0; right: 0;
  width: 200px; height: 200px;
  background: radial-gradient(circle, rgba(201, 162, 39, 0.15) 0%, transparent 70%);
}
.chapter-banner-num {
  font-family: var(--font-serif);
  font-size: 14px;
  color: var(--gold-light);
  letter-spacing: 3px;
  margin-bottom: 8px;
}
.chapter-banner-title {
  font-family: var(--font-serif);
  font-size: 28px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 8px;
}
.chapter-banner-desc {
  font-size: 15px;
  color: rgba(255, 255, 255, 0.75);
  line-height: 1.8;
}

/* ---------- 内容卡片 ---------- */
.content-card {
  background: var(--bg-cream);
  border-radius: var(--radius-card);
  padding: 36px 36px;
  margin-bottom: 24px;
  box-shadow: var(--shadow-soft);
  border: 1px solid var(--border-soft);
}
.content-card h3 {
  font-family: var(--font-serif);
  font-size: 22px;
  font-weight: 700;
  color: var(--red-deep);
  margin-bottom: 16px;
  padding-left: 14px;
  border-left: 4px solid var(--gold-primary);
}
.content-card h4 {
  font-size: 17px;
  font-weight: 600;
  color: var(--ink-deep);
  margin: 20px 0 10px;
}
.content-card p {
  font-size: 15px;
  line-height: 2;
  color: var(--ink-deep);
  margin-bottom: 14px;
}
.content-card p strong {
  color: var(--red-primary);
  font-weight: 600;
}
.content-card ul, .content-card ol {
  margin: 10px 0 14px 20px;
}
.content-card li {
  font-size: 15px;
  line-height: 2;
  color: var(--ink-deep);
  margin-bottom: 6px;
}

/* ---------- 引言块 ---------- */
.quote-block {
  background: linear-gradient(135deg, rgba(139, 0, 0, 0.04), rgba(201, 162, 39, 0.06));
  border-left: 4px solid var(--red-primary);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  padding: 20px 28px;
  margin: 20px 0;
}
.quote-block p {
  font-family: var(--font-serif);
  font-size: 16px;
  color: var(--red-deep);
  font-style: italic;
  line-height: 1.9;
}
.quote-block .quote-author {
  font-size: 13px;
  color: var(--gold-deep);
  margin-top: 8px;
  text-align: right;
}

/* ---------- 方法论图谱 ---------- */
.method-map {
  background: var(--bg-cream);
  border-radius: var(--radius-card);
  padding: 40px;
  box-shadow: var(--shadow-soft);
  border: 1px solid var(--border-soft);
  margin: 32px 0;
}
.method-map-title {
  font-family: var(--font-serif);
  font-size: 20px;
  font-weight: 700;
  color: var(--red-deep);
  text-align: center;
  margin-bottom: 28px;
}
.method-map-canvas {
  width: 100%;
  aspect-ratio: 3 / 2;
  background: var(--bg-paper);
  border-radius: var(--radius-sm);
}

/* ---------- 对比表格 ---------- */
.compare-table {
  width: 100%;
  border-collapse: collapse;
  margin: 20px 0;
  border-radius: var(--radius-sm);
  overflow: hidden;
  box-shadow: var(--shadow-soft);
}
.compare-table th {
  background: var(--red-deep);
  color: #fff;
  font-size: 14px;
  font-weight: 600;
  padding: 14px 18px;
  text-align: left;
}
.compare-table td {
  background: var(--bg-cream);
  font-size: 14px;
  padding: 14px 18px;
  border-bottom: 1px solid var(--border-soft);
  line-height: 1.8;
}
.compare-table tr:last-child td {
  border-bottom: none;
}

/* ---------- 示意图容器 ---------- */
.diagram-box {
  background: var(--bg-cream);
  border-radius: var(--radius-card);
  padding: 32px;
  margin: 24px 0;
  box-shadow: var(--shadow-soft);
  border: 1px solid var(--border-soft);
  text-align: center;
}
.diagram-box-title {
  font-family: var(--font-serif);
  font-size: 16px;
  font-weight: 600;
  color: var(--red-deep);
  margin-bottom: 16px;
}
.diagram-svg {
  width: 100%;
  max-width: 640px;
  margin: 0 auto;
  display: block;
}
.diagram-caption {
  font-size: 13px;
  color: var(--ink-light);
  margin-top: 12px;
}

/* ---------- 启发卡片 ---------- */
.insight-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
  margin: 24px 0;
}
.insight-card {
  background: linear-gradient(135deg, rgba(139, 0, 0, 0.03), rgba(201, 162, 39, 0.05));
  border-radius: var(--radius-sm);
  padding: 24px;
  border: 1px solid var(--border-soft);
}
.insight-card-icon {
  font-size: 28px;
  margin-bottom: 12px;
}
.insight-card-title {
  font-family: var(--font-serif);
  font-size: 16px;
  font-weight: 700;
  color: var(--red-deep);
  margin-bottom: 8px;
}
.insight-card-text {
  font-size: 14px;
  color: var(--ink-gray);
  line-height: 1.8;
}

/* ---------- 页脚 ---------- */
.footer {
  background: var(--red-deep);
  padding: 48px 24px 32px;
  text-align: center;
  position: relative;
  z-index: 1;
}
.footer p {
  color: rgba(255, 255, 255, 0.6);
  font-size: 13px;
  line-height: 1.8;
  margin-bottom: 8px;
}
.footer-divider {
  width: 60px;
  height: 2px;
  background: var(--gold-deep);
  margin: 0 auto 20px;
  border-radius: 2px;
}

/* ---------- 滚动渐入 ---------- */
.fade-in {
  opacity: 0;
  transform: translateY(40px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}
.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ---------- 打印版样式 ---------- */
@media print {
  body { background: #fff; font-size: 12pt; }
  .navbar, .hero-scroll, .footer { display: none; }
  .hero { min-height: auto; padding: 20px; page-break-after: always; }
  .section { padding: 20px 0; page-break-inside: avoid; }
  .chapter { page-break-inside: avoid; }
  .content-card { page-break-inside: avoid; box-shadow: none; border: 1px solid #ccc; }
  .chapter-banner { background: #8B0000 !important; -webkit-print-color-adjust: exact; print-color-adjust: exact; }
  .fade-in { opacity: 1; transform: none; }
  a { color: #000; text-decoration: none; }
}

/* ---------- 响应式 ---------- */
@media (max-width: 768px) {
  .navbar-toggle { display: flex; }
  .navbar-links {
    position: fixed;
    top: 64px; left: 0; right: 0;
    background: rgba(92, 0, 0, 0.97);
    flex-direction: column;
    padding: 16px;
    gap: 4px;
    transform: translateY(-100%);
    transition: transform 0.3s;
    z-index: 999;
  }
  .navbar-links.open { transform: translateY(0); }
  .navbar-links a { padding: 12px 16px; font-size: 15px; }

  .chapter-grid { grid-template-columns: 1fr; }
  .leader-wall { grid-template-columns: 1fr; }
  .insight-grid { grid-template-columns: 1fr; }
  .content-card { padding: 24px 20px; }
  .chapter-banner { padding: 28px 24px; }
  .section { padding: 60px 16px; }
  .hero-stats { gap: 24px; }
  .hero-stat-num { font-size: 28px; }
  .method-map { padding: 24px 16px; }
  .diagram-box { padding: 20px 16px; }
  .compare-table { font-size: 12px; }
  .compare-table th, .compare-table td { padding: 10px 12px; }
}

@media (max-width: 480px) {
  .section-title { font-size: 24px; }
  .chapter-banner-title { font-size: 22px; }
  .content-card h3 { font-size: 18px; }
  .hero-title { font-size: 30px; }
}