/* ============================================
   个人家庭信息智慧库 - 全局样式系统
   Personal Family Information Wisdom Library
   ============================================ */

/* --- CSS 变量 / 设计令牌 --- */
:root {
  /* 主色调 - 深蓝紫渐变 */
  --color-primary: #4f46e5;
  --color-primary-light: #6366f1;
  --color-primary-dark: #3730a3;
  --color-secondary: #06b6d4;
  --color-accent: #8b5cf6;
  --color-accent-warm: #f59e0b;

  /* 背景渐变 */
  --bg-gradient-main: linear-gradient(135deg, #0f172a 0%, #1e1b4b 30%, #172554 60%, #0f172a 100%);
  --bg-gradient-card: linear-gradient(135deg, rgba(255,255,255,0.08) 0%, rgba(255,255,255,0.03) 100%);
  --bg-gradient-glow: radial-gradient(ellipse at center, rgba(99,102,241,0.15) 0%, transparent 70%);

  /* 玻璃态 */
  --glass-bg: rgba(255, 255, 255, 0.06);
  --glass-border: rgba(255, 255, 255, 0.12);
  --glass-bg-hover: rgba(255, 255, 255, 0.10);
  --glass-shadow: 0 8px 32px rgba(0, 0, 0, 0.2);
  --glass-blur: blur(16px) saturate(180%);

  /* 文字 */
  --text-primary: #f1f5f9;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --text-accent: #a5b4fc;

  /* 圆角 */
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-xl: 28px;
  --radius-full: 9999px;

  /* 阴影 */
  --shadow-sm: 0 2px 8px rgba(0,0,0,0.15);
  --shadow-md: 0 8px 32px rgba(0,0,0,0.25);
  --shadow-lg: 0 16px 48px rgba(0,0,0,0.35);
  --shadow-glow: 0 0 40px rgba(99,102,241,0.25);

  /* 间距 */
  --space-xs: 6px;
  --space-sm: 12px;
  --space-md: 20px;
  --space-lg: 32px;
  --space-xl: 48px;
  --space-2xl: 72px;

  /* 过渡 */
  --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-base: 0.35s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

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

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

body {
  font-family: 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', sans-serif;
  background: var(--bg-gradient-main);
  color: var(--text-primary);
  min-height: 100vh;
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* 动态背景粒子 */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  background:
    radial-gradient(ellipse 80% 60% at 20% 20%, rgba(99,102,241,0.12) 0%, transparent 50%),
    radial-gradient(ellipse 60% 80% at 80% 70%, rgba(6,182,212,0.08) 0%, transparent 50%),
    radial-gradient(ellipse 50% 50% at 50% 50%, rgba(139,92,246,0.06) 0%, transparent 50%);
  pointer-events: none;
  z-index: -2;
}

/* 网格背景纹理 */
body::after {
  content: '';
  position: fixed;
  inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,0.02) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.02) 1px, transparent 1px);
  background-size: 60px 60px;
  pointer-events: none;
  z-index: -1;
}

a {
  color: var(--text-accent);
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover {
  color: #c7d2fe;
}

/* --- 导航栏 --- */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(15, 23, 42, 0.75);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border-bottom: 1px solid var(--glass-border);
  padding: 0 var(--space-xl);
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  transition: all var(--transition-base);
}

.navbar.scrolled {
  background: rgba(15, 23, 42, 0.9);
  box-shadow: 0 4px 24px rgba(0,0,0,0.3);
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: 0.5px;
}

.nav-brand .logo-icon {
  width: 36px;
  height: 36px;
  background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  box-shadow: 0 4px 12px rgba(99,102,241,0.3);
}

.nav-links {
  display: flex;
  gap: var(--space-xs);
  list-style: none;
}

.nav-links a {
  padding: 8px 18px;
  border-radius: var(--radius-full);
  color: var(--text-secondary);
  font-size: 0.9rem;
  font-weight: 500;
  transition: all var(--transition-fast);
  position: relative;
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--text-primary);
  background: rgba(255,255,255,0.08);
}

.nav-links a.active::after {
  content: '';
  position: absolute;
  bottom: 2px;
  left: 50%;
  transform: translateX(-50%);
  width: 20px;
  height: 3px;
  background: var(--color-primary-light);
  border-radius: var(--radius-full);
}

/* --- 通用玻璃卡片 --- */
.glass-card {
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--glass-shadow);
  transition: all var(--transition-base);
  overflow: hidden;
}

.glass-card:hover {
  background: var(--glass-bg-hover);
  border-color: rgba(255,255,255,0.18);
  box-shadow: var(--shadow-lg), var(--shadow-glow);
  transform: translateY(-2px);
}

/* --- 按钮 --- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  padding: 10px 24px;
  border: none;
  border-radius: var(--radius-full);
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-fast);
  letter-spacing: 0.3px;
}

.btn-primary {
  background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
  color: white;
  box-shadow: 0 4px 16px rgba(99,102,241,0.3);
}

.btn-primary:hover {
  box-shadow: 0 6px 24px rgba(99,102,241,0.45);
  transform: translateY(-1px);
}

.btn-glass {
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  border: 1px solid var(--glass-border);
  color: var(--text-primary);
}

.btn-glass:hover {
  background: var(--glass-bg-hover);
  border-color: rgba(255,255,255,0.25);
}

/* --- 页面头部 --- */
.page-hero {
  text-align: center;
  padding: 100px var(--space-md) var(--space-lg);
}

.page-hero .page-badge {
  display: inline-block;
  padding: 6px 16px;
  background: rgba(99,102,241,0.15);
  border: 1px solid rgba(99,102,241,0.3);
  border-radius: var(--radius-full);
  font-size: 0.8rem;
  color: var(--text-accent);
  font-weight: 600;
  letter-spacing: 1px;
  text-transform: uppercase;
  margin-bottom: var(--space-md);
}

.page-hero h1 {
  font-size: 2.8rem;
  font-weight: 800;
  background: linear-gradient(135deg, #e2e8f0 0%, #a5b4fc 50%, #67e8f9 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  letter-spacing: -0.5px;
  margin-bottom: var(--space-sm);
}

.page-hero .hero-subtitle {
  font-size: 1.1rem;
  color: var(--text-secondary);
  max-width: 500px;
  margin: 0 auto;
}

/* --- 动画关键帧 --- */
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(24px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes fadeInScale {
  from { opacity: 0; transform: scale(0.92); }
  to { opacity: 1; transform: scale(1); }
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.5; }
}

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-12px); }
}

@keyframes spin-slow {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

@keyframes shimmer {
  0% { background-position: -200% 0; }
  100% { background-position: 200% 0; }
}

@keyframes connectPulse {
  0%, 100% { stroke-opacity: 0.3; stroke-width: 1; }
  50% { stroke-opacity: 0.7; stroke-width: 2; }
}

.animate-in {
  animation: fadeInUp 0.7s ease forwards;
  opacity: 0;
}

/* --- 滚动条 --- */
::-webkit-scrollbar {
  width: 6px;
}

::-webkit-scrollbar-track {
  background: transparent;
}

::-webkit-scrollbar-thumb {
  background: rgba(255,255,255,0.12);
  border-radius: var(--radius-full);
}

::-webkit-scrollbar-thumb:hover {
  background: rgba(255,255,255,0.2);
}

/* --- 响应式 --- */
@media (max-width: 1024px) {
  .page-hero h1 { font-size: 2.2rem; }
  .navbar { padding: 0 var(--space-md); }
}

@media (max-width: 768px) {
  .page-hero h1 { font-size: 1.8rem; }
  .navbar {
    padding: 0 var(--space-sm);
    height: 56px;
  }
  .nav-brand { font-size: 1rem; }
  .nav-links a { padding: 6px 12px; font-size: 0.8rem; }
}