/* ====== 公道组织 — 全局样式 ====== */

:root {
  --color-bg: #f8f9fb;
  --color-surface: #ffffff;
  --color-text: #1a1a2e;
  --color-text-secondary: #6b7280;
  --color-primary: #1e3a5f;
  --color-primary-light: #2d5a8e;
  --color-accent: #c8a84e;
  --color-accent-light: #e8d48b;
  --color-border: #e5e7eb;
  --color-bg-alt: #f0f2f5;
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.06);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.08);
  --shadow-lg: 0 8px 30px rgba(0,0,0,0.10);
  --transition: all 0.3s ease;
  --max-width: 1200px;
}

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

body {
  font-family: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, sans-serif;
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

/* ====== 排版 ====== */
h1, h2, h3, h4 {
  font-family: 'Noto Serif SC', serif;
  line-height: 1.3;
  font-weight: 600;
}

h1 {
  font-size: 2.8rem;
  position: relative;
  padding-bottom: 1rem;
  margin-bottom: 1.5rem;
}

h1::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 510px;
  height: 3px;
  background: linear-gradient(90deg, var(--color-accent), var(--color-accent-light));
  border-radius: 2px;
}

h1.center-title::after {
  left: 50%;
  transform: translateX(-50%);
}

h1, .center-title { text-align: center; }

h2 {
  font-size: 1.8rem;
  margin-bottom: 1.2rem;
  color: var(--color-primary);
}

h3 {
  font-size: 1.25rem;
  margin-bottom: 0.6rem;
  color: var(--color-primary-light);
}

p { margin-bottom: 1rem; color: var(--color-text-secondary); }
a { color: var(--color-primary-light); text-decoration: none; transition: var(--transition); }
a:hover { color: var(--color-accent); }

/* ====== 布局容器 ====== */
.main-content { min-height: calc(100vh - 200px); }

.page-section {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 4rem 2rem;
}

.page-section-narrow {
  max-width: 900px;
  margin: 0 auto;
  padding: 4rem 2rem;
}

.section-subtitle {
  text-align: center;
  color: var(--color-text-secondary);
  font-size: 1.05rem;
  max-width: 700px;
  margin: -0.8rem auto 2.5rem;
}

/* ====== Hero 区域 ====== */
.hero {
  min-height: 70vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 6rem 2rem;
  background: linear-gradient(160deg, var(--color-primary) 0%, #0f2a43 100%);
  color: #fff;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(ellipse at 30% 50%, rgba(200,168,78,0.08) 0%, transparent 60%);
  pointer-events: none;
}

.hero-content { position: relative; z-index: 1; }

.hero-title {
  font-family: 'Noto Serif SC', serif;
  font-size: 3.2rem;
  font-weight: 700;
  margin-bottom: 1rem;
  letter-spacing: 2px;
}

.hero-subtitle {
  font-size: 1.6rem;
  font-weight: 300;
  margin-bottom: 2rem;
  color: var(--color-accent-light);
  letter-spacing: 4px;
}

.hero-desc {
  font-size: 1.1rem;
  max-width: 640px;
  margin: 0 auto;
  color: rgba(255,255,255,0.75);
  line-height: 1.8;
}

.hero-motto {
  display: inline-flex;
  gap: 1.5rem;
  margin-top: 2rem;
  padding: 0.8rem 2rem;
  border: 1px solid rgba(255,255,255,0.15);
  border-radius: 50px;
  font-size: 1rem;
  color: var(--color-accent-light);
  letter-spacing: 2px;
}

/* ====== 网格 & 卡片 ====== */
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1.5rem; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.5rem; }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1.5rem; }
.grid-auto { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 1.5rem; }

.card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 2rem;
  transition: var(--transition);
  box-shadow: var(--shadow-sm);
}

.card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-3px);
  border-color: var(--color-accent-light);
}

.card-icon {
  font-size: 2rem;
  margin-bottom: 0.8rem;
}

.card p {
  font-size: 0.95rem;
  line-height: 1.6;
}

/* 原则卡片 */
.principle-card {
  background: var(--color-surface);
  border-left: 4px solid var(--color-accent);
  border-radius: var(--radius-sm);
  padding: 2rem;
  margin-bottom: 1.5rem;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
}

.principle-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateX(4px);
}

.principle-card .principle-number {
  font-family: 'Noto Serif SC', serif;
  font-size: 0.85rem;
  color: var(--color-accent);
  letter-spacing: 2px;
  margin-bottom: 0.4rem;
}

.principle-card h3 { margin-bottom: 0.5rem; }

.principle-card p {
  font-size: 0.95rem;
  margin-bottom: 0;
}

/* ====== 关于页面特有 ====== */
.about-hero-compact {
  background: var(--color-primary);
  color: #fff;
  padding: 4rem 2rem;
  text-align: center;
}

.about-hero-compact h1 { color: #fff; }
.about-hero-compact h1::after {
  left: 50%;
  transform: translateX(-50%);
  background: linear-gradient(90deg, var(--color-accent), var(--color-accent-light));
}

.about-hero-compact .hero-desc { max-width: 600px; margin: 0 auto; }

.goal-list {
  list-style: none;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.2rem;
}

.goal-list li {
  display: flex;
  align-items: flex-start;
  gap: 0.8rem;
  padding: 1rem;
  background: var(--color-bg-alt);
  border-radius: var(--radius-sm);
  font-size: 0.95rem;
}

.goal-list li .goal-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: var(--color-accent);
  color: #fff;
  font-size: 0.85rem;
  font-weight: 700;
  flex-shrink: 0;
}

/* ====== 结构图 ====== */
.structure-diagram {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1rem;
  padding: 2rem 0;
}

.structure-level {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1rem;
}

.structure-node {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 1rem 2rem;
  background: var(--color-surface);
  border: 2px solid var(--color-border);
  border-radius: var(--radius-md);
  font-weight: 500;
  font-size: 1rem;
  transition: var(--transition);
}

.structure-node:hover {
  border-color: var(--color-accent);
  box-shadow: var(--shadow-md);
}

.structure-node.primary {
  border-color: var(--color-primary);
  background: var(--color-primary);
  color: #fff;
}

.structure-node.secondary {
  border-color: var(--color-accent);
}

.structure-node.tertiary {
  border-color: var(--color-text-secondary);
}

.structure-connector {
  width: 2px;
  height: 30px;
  background: var(--color-border);
}

/* ====== 表格 ====== */
.data-table {
  width: 100%;
  border-collapse: collapse;
  margin: 1.5rem 0;
  background: var(--color-surface);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}

.data-table thead {
  background: var(--color-primary);
  color: #fff;
}

.data-table th, .data-table td {
  padding: 1rem 1.2rem;
  text-align: left;
  border-bottom: 1px solid var(--color-border);
}

.data-table th { font-weight: 600; font-size: 0.95rem; }
.data-table td { font-size: 0.95rem; }
.data-table tbody tr:hover { background: var(--color-bg-alt); }

/* ====== 占位元素 ====== */
.chart-placeholder {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 300px;
  background: var(--color-bg-alt);
  border: 2px dashed var(--color-border);
  border-radius: var(--radius-md);
  color: var(--color-text-secondary);
  font-size: 0.95rem;
}

/* ====== FAQ ====== */
.faq-item {
  border-bottom: 1px solid var(--color-border);
  padding: 1.2rem 0;
}

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

.faq-question {
  font-weight: 600;
  font-size: 1.05rem;
  color: var(--color-primary);
  margin-bottom: 0.4rem;
  cursor: default;
}

.faq-answer {
  font-size: 0.95rem;
  color: var(--color-text-secondary);
  line-height: 1.7;
}

/* ====== 联系方式 ====== */
.contact-methods {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 1.5rem;
}

.contact-card {
  text-align: center;
  padding: 2rem 1.5rem;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  transition: var(--transition);
}

.contact-card:hover {
  box-shadow: var(--shadow-md);
  border-color: var(--color-accent-light);
}

.contact-card .contact-icon {
  font-size: 2.5rem;
  margin-bottom: 0.8rem;
}

.contact-card h3 { font-size: 1.1rem; }

/* ====== 认知资产分级 ====== */
.tier-badge {
  display: inline-block;
  padding: 0.2rem 0.8rem;
  border-radius: 50px;
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 1px;
  margin-bottom: 0.6rem;
}

.tier-badge.初级 { background: #e8f5e9; color: #2e7d32; }
.tier-badge.中级 { background: #fff3e0; color: #e65100; }
.tier-badge.高级 { background: #fce4ec; color: #c62828; }

/* ====== 加载/占位 ====== */
.placeholder-text {
  color: var(--color-text-secondary);
  font-style: italic;
  text-align: center;
  padding: 2rem;
}

/* ====== 404 ====== */
.error-page {
  text-align: center;
  padding: 6rem 2rem;
}

.error-page .error-code {
  font-size: 8rem;
  font-weight: 700;
  color: var(--color-primary);
  line-height: 1;
  margin-bottom: 0.5rem;
  font-family: 'Noto Serif SC', serif;
}

.error-page h2 {
  font-size: 1.6rem;
  margin-bottom: 1rem;
}

.error-page p {
  max-width: 400px;
  margin: 0 auto 2rem;
}

/* ====== 按钮 ====== */
.btn {
  display: inline-block;
  padding: 0.7rem 2rem;
  border: none;
  border-radius: 50px;
  font-size: 0.95rem;
  font-weight: 500;
  cursor: pointer;
  transition: var(--transition);
  text-decoration: none;
}

.btn-primary {
  background: var(--color-accent);
  color: #fff;
}

.btn-primary:hover {
  background: var(--color-primary);
  color: #fff;
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.btn-outline {
  background: transparent;
  border: 1px solid var(--color-accent);
  color: var(--color-accent);
}

.btn-outline:hover {
  background: var(--color-accent);
  color: #fff;
}

/* ====== 分割装饰线 ====== */
.section-divider {
  width: 40px;
  height: 2px;
  background: var(--color-accent);
  margin: 2rem auto;
  border-radius: 1px;
}

/* ====== Header 导航 ====== */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: rgba(26, 35, 50, 0.95);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(255,255,255,0.06);
  transition: var(--transition);
}

.nav-container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 2rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  text-decoration: none;
  color: #fff;
  font-family: 'Noto Serif SC', serif;
  font-size: 1.15rem;
  font-weight: 600;
  letter-spacing: 0.5px;
}

.nav-logo:hover { color: var(--color-accent); }

.logo-icon { font-size: 1.3rem; }

.nav-links {
  display: flex;
  list-style: none;
  gap: 0.25rem;
  align-items: center;
}

.nav-links li a {
  display: block;
  padding: 0.5rem 1rem;
  color: rgba(255,255,255,0.7);
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 400;
  border-radius: 6px;
  transition: var(--transition);
  letter-spacing: 0.3px;
}

.nav-links li a:hover {
  color: #fff;
  background: rgba(255,255,255,0.08);
}

.nav-links li a.active {
  color: var(--color-accent);
  background: rgba(200,168,78,0.1);
}

/* 汉堡菜单按钮 */
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}

.nav-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: #fff;
  border-radius: 2px;
  transition: var(--transition);
}

/* ====== 响应式 ====== */
@media (max-width: 768px) {
  h1 { font-size: 2rem; }
  .hero-title { font-size: 2rem; }
  .hero-subtitle { font-size: 1.2rem; }
  .hero-motto { flex-direction: column; gap: 0.3rem; align-items: center; }
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
  .goal-list { grid-template-columns: 1fr; }
  .page-section { padding: 3rem 1.2rem; }

  .nav-toggle { display: flex; }
  .nav-links {
    position: fixed;
    top: 64px;
    left: 0;
    right: 0;
    flex-direction: column;
    background: rgba(26, 35, 50, 0.98);
    backdrop-filter: blur(12px);
    padding: 1rem;
    gap: 0;
    transform: translateY(-100%);
    opacity: 0;
    pointer-events: none;
    transition: var(--transition);
    border-bottom: 1px solid rgba(255,255,255,0.06);
  }
  .nav-links.open {
    transform: translateY(0);
    opacity: 1;
    pointer-events: auto;
  }
  .nav-links li a {
    padding: 0.8rem 1rem;
    font-size: 1rem;
  }
}

/* ====== 页脚 ====== */
.site-footer {
  background: var(--color-primary);
  color: rgba(255,255,255,0.8);
  padding: 3rem 2rem 1.5rem;
  margin-top: 4rem;
}

.footer-container { max-width: var(--max-width); margin: 0 auto; }

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.5fr;
  gap: 2rem;
  margin-bottom: 2rem;
}

.footer-logo {
  font-family: 'Noto Serif SC', serif;
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--color-accent);
}

.footer-desc {
  font-size: 0.85rem;
  margin-top: 0.5rem;
  color: rgba(255,255,255,0.55);
  line-height: 1.6;
}

.footer-links h4,
.footer-info h4 {
  font-family: 'Noto Sans SC', sans-serif;
  font-size: 0.85rem;
  color: var(--color-accent);
  margin-bottom: 0.8rem;
  letter-spacing: 1px;
  text-transform: uppercase;
}

.footer-links ul { list-style: none; }
.footer-links ul li { margin-bottom: 0.4rem; }
.footer-links ul li a {
  color: rgba(255,255,255,0.6);
  font-size: 0.88rem;
  text-decoration: none;
  transition: var(--transition);
}
.footer-links ul li a:hover { color: var(--color-accent); }

.footer-info p {
  font-size: 0.85rem;
  color: rgba(255,255,255,0.55);
  margin-bottom: 0.3rem;
}
.footer-info a { color: var(--color-accent); }

.footer-motto {
  margin-top: 0.5rem;
  color: var(--color-accent-light) !important;
  font-family: 'Noto Serif SC', serif;
  letter-spacing: 1px;
}

.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.08);
  padding-top: 1.2rem;
  text-align: center;
}
.footer-bottom p {
  font-size: 0.8rem;
  color: rgba(255,255,255,0.4);
}

@media (max-width: 768px) {
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 1.5rem; }
  .footer-grid > :first-child { grid-column: 1 / -1; }
}

@media (max-width: 480px) {
  .footer-grid { grid-template-columns: 1fr; }
}

/* ====== Hero 调整为固定导航偏移 ====== */
.main-content { padding-top: 64px; }

/* ====== 响应式微调 ====== */
@media (max-width: 768px) {
  .structure-diagram .structure-level[style*="flex-direction:row"] {
    flex-direction: column !important;
    gap: 0.5rem !important;
  }
}