/* ============================================
   公共卫生防护 · AI乐园风互动指南
   共享样式表 — 马卡龙色系 + 暗色背景
   ============================================ */

/* ---------- CSS 自定义属性 (主题色) ---------- */
:root {
  --color-pink-blue: #A8D8EA;
  --color-yellow: #F9E79F;
  --color-mint: #A3E4D7;
  --color-lavender: #D7BDE2;
  --color-coral: #F7CAC9;
  --color-sky: #B5EAD7;

  --color-bg-start: #ffffff;
  --color-bg-end: #ffffff;
  --color-card-bg: rgba(255, 255, 255, 0.85);
  --color-card-border: rgba(0, 0, 0, 0.08);
  --color-text: #333333;
  --color-text-secondary: #666666;
  --color-heading: #222222;

  --radius-sm: 10px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --radius-xl: 32px;

  --shadow-card: 0 4px 24px rgba(0, 0, 0, 0.3);
  --shadow-hover: 0 8px 36px rgba(0, 0, 0, 0.45);
  --transition-fast: 0.2s ease;
  --transition-normal: 0.3s ease;
}

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

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

body {
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Segoe UI", sans-serif;
  background: linear-gradient(135deg, var(--color-bg-start) 0%, var(--color-bg-end) 100%);
  color: var(--color-text);
  min-height: 100vh;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

/* ---------- 导航栏 ---------- */
.site-nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 24px;
  background: rgba(255, 255, 255, 0.75);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(0, 0, 0, 0.06);
  position: sticky;
  top: 0;
  z-index: 100;
}

.site-nav .logo {
  font-size: 1.2rem;
  font-weight: 700;
  background: linear-gradient(135deg, var(--color-pink-blue), var(--color-lavender));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  text-decoration: none;
}

.site-nav .nav-links {
  display: flex;
  gap: 20px;
  list-style: none;
}

.site-nav .nav-links a {
  color: #555555;
  text-decoration: none;
  font-size: 0.95rem;
  transition: color var(--transition-fast);
  padding: 6px 12px;
  border-radius: var(--radius-sm);
}

.site-nav .nav-links a:hover,
.site-nav .nav-links a.active {
  color: var(--color-pink-blue);
  background: rgba(168, 216, 234, 0.1);
}

/* ---------- 主容器 ---------- */
.container {
  max-width: 900px;
  margin: 0 auto;
  padding: 32px 20px 60px;
}

/* ---------- 标题 ---------- */
.page-title {
  font-size: 2.2rem;
  font-weight: 800;
  text-align: center;
  margin-bottom: 12px;
  background: linear-gradient(135deg, var(--color-pink-blue) 0%, var(--color-yellow) 50%, var(--color-mint) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.page-subtitle {
  text-align: center;
  color: var(--color-text-secondary);
  font-size: 1.05rem;
  margin-bottom: 36px;
}

/* ---------- 卡片 ---------- */
.card {
  background: var(--color-card-bg);
  border: 1px solid var(--color-card-border);
  border-radius: var(--radius-lg);
  padding: 28px;
  box-shadow: var(--shadow-card);
  transition: transform var(--transition-normal), box-shadow var(--transition-normal);
}

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

.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 24px;
  margin-top: 24px;
}

/* ---------- 按钮 ---------- */
.btn {
  display: inline-block;
  padding: 12px 28px;
  border: none;
  border-radius: var(--radius-md);
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: transform var(--transition-fast), box-shadow var(--transition-fast), opacity var(--transition-fast);
  text-decoration: none;
  text-align: center;
  color: #1a1a2e;
}

.btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.3);
}

.btn:active {
  transform: translateY(0);
}

.btn-primary {
  background: linear-gradient(135deg, var(--color-pink-blue), var(--color-mint));
}

.btn-secondary {
  background: linear-gradient(135deg, var(--color-lavender), var(--color-coral));
}

.btn-warning {
  background: linear-gradient(135deg, var(--color-yellow), var(--color-coral));
}

.btn-block {
  display: block;
  width: 100%;
}

/* ---------- 选项按钮组 (选择题用) ---------- */
.options-group {
  display: flex;
  flex-direction: column;
  gap: 14px;
  margin-top: 20px;
}

.option-btn {
  background: var(--color-card-bg);
  border: 2px solid var(--color-card-border);
  border-radius: var(--radius-md);
  padding: 16px 20px;
  color: var(--color-text);
  font-size: 1rem;
  cursor: pointer;
  transition: all var(--transition-fast);
  text-align: left;
}

.option-btn:hover {
  border-color: var(--color-pink-blue);
  background: rgba(168, 216, 234, 0.1);
  transform: translateX(4px);
}

.option-btn.selected {
  border-color: var(--color-mint);
  background: rgba(163, 228, 215, 0.15);
}

/* ---------- 结果/反馈区 ---------- */
.result-box {
  margin-top: 24px;
  padding: 24px;
  border-radius: var(--radius-lg);
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--color-card-border);
  animation: fadeInUp 0.5s ease;
}

.result-box.success {
  border-color: var(--color-mint);
  background: rgba(163, 228, 215, 0.08);
}

.result-box.warning {
  border-color: var(--color-yellow);
  background: rgba(249, 231, 159, 0.08);
}

/* ---------- 科普动画区 ---------- */
.knowledge-box {
  margin-top: 20px;
  padding: 20px;
  border-radius: var(--radius-lg);
  background: rgba(215, 189, 226, 0.1);
  border: 1px solid var(--color-lavender);
  animation: fadeInUp 0.6s ease;
}

.knowledge-box h3 {
  color: var(--color-lavender);
  margin-bottom: 10px;
}

/* ---------- 进度条 ---------- */
.progress-bar {
  width: 100%;
  height: 8px;
  background: rgba(0, 0, 0, 0.05);
  border-radius: 4px;
  margin: 16px 0 24px;
  overflow: hidden;
}

.progress-bar .fill {
  height: 100%;
  border-radius: 4px;
  background: linear-gradient(90deg, var(--color-pink-blue), var(--color-mint));
  transition: width 0.5s ease;
}

/* ---------- 步骤指示器 ---------- */
.step-indicator {
  display: flex;
  justify-content: center;
  gap: 8px;
  margin-bottom: 28px;
}

.step-dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: rgba(0, 0, 0, 0.06);
  transition: background var(--transition-fast);
}

.step-dot.active {
  background: var(--color-pink-blue);
}

.step-dot.done {
  background: var(--color-mint);
}

/* ---------- 页脚 ---------- */
.site-footer {
  text-align: center;
  padding: 24px;
  color: var(--color-text-secondary);
  font-size: 0.85rem;
  border-top: 1px solid var(--color-card-border);
  margin-top: 40px;
}

/* ---------- 英雄区大图标 ---------- */
.hero-icon {
  font-size: 4rem;
  margin-bottom: 16px;
  animation: spin 4s linear infinite;
  display: inline-block;
}

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

/* ---------- 步骤小贴士 ---------- */
.step-tip {
  margin-top: 16px;
  padding: 12px 16px;
  background: rgba(168,216,234,0.1);
  border-left: 3px solid var(--color-pink-blue);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  color: var(--color-text-secondary);
  font-size: 0.9rem;
  animation: fadeInUp 0.4s ease;
}

/* ---------- 健康分圆环 ---------- */
.score-display {
  text-align: center;
  margin-bottom: 20px;
}
.score-circle {
  width: 90px;
  height: 90px;
  border-radius: 50%;
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  position: relative;
}
.score-circle::after {
  content: '';
  position: absolute;
  width: 70px;
  height: 70px;
  border-radius: 50%;
  background: var(--color-card-bg);
}
.score-num {
  position: relative;
  z-index: 1;
  font-size: 1.8rem;
  font-weight: 800;
  color: var(--color-text);
  line-height: 1;
}
.score-label {
  position: relative;
  z-index: 1;
  font-size: 0.7rem;
  color: var(--color-text-secondary);
}
.score-msg {
  margin-top: 8px;
  font-size: 0.95rem;
  color: var(--color-text-secondary);
}

/* ---------- 动画 ---------- */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes pulse {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.05); }
}

.animate-in {
  animation: fadeInUp 0.5s ease forwards;
}

@keyframes confettiFall {
  0%   { transform: translateY(0) rotate(0deg); opacity: 1; }
  100% { transform: translateY(105vh) rotate(720deg); opacity: 0; }
}

/* ---------- 响应式 ---------- */
@media (max-width: 640px) {
  .page-title {
    font-size: 1.6rem;
  }

  .site-nav {
    flex-direction: column;
    gap: 10px;
    padding: 12px 16px;
  }

  .site-nav .nav-links {
    gap: 8px;
    flex-wrap: wrap;
    justify-content: center;
  }

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

  .container {
    padding: 20px 14px 40px;
  }
}