/* ============================================
   端午游园会 — 共享样式表
   暗色主题 · 渐变背景 · 卡片动效
   ============================================ */

/* --- CSS 自定义属性（主题色） --- */
:root {
  --color-bg-start: #0a1628;
  --color-bg-end: #0d2818;
  --color-primary: #4ade80;
  --color-secondary: #fbbf24;
  --color-accent: #ef4444;
  --color-text: #e2e8f0;
  --color-text-dim: #94a3b8;
  --color-card-bg: rgba(255, 255, 255, 0.06);
  --color-card-border: rgba(74, 222, 128, 0.25);
  --color-card-hover-border: rgba(74, 222, 128, 0.7);
  --color-glow: rgba(74, 222, 128, 0.15);
  --radius: 16px;
  --shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
  --font-stack: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Microsoft YaHei", sans-serif;
}

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

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

body {
  font-family: var(--font-stack);
  background: linear-gradient(135deg, var(--color-bg-start), var(--color-bg-end));
  color: var(--color-text);
  min-height: 100vh;
  line-height: 1.6;
  padding: 20px;
}

/* --- 渐变标题 --- */
.gradient-title {
  font-size: 2.5rem;
  font-weight: 800;
  background: linear-gradient(135deg, var(--color-primary), var(--color-secondary), var(--color-accent));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  text-align: center;
  margin-bottom: 8px;
}

.subtitle {
  text-align: center;
  color: var(--color-text-dim);
  font-size: 1.05rem;
  margin-bottom: 32px;
}

/* --- 导航栏 --- */
.nav-bar {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 40px;
  padding: 12px 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.nav-bar a {
  color: var(--color-text-dim);
  text-decoration: none;
  padding: 6px 16px;
  border-radius: 20px;
  font-size: 0.9rem;
  transition: all 0.25s ease;
}

.nav-bar a:hover {
  color: var(--color-primary);
  background: rgba(74, 222, 128, 0.1);
}

.nav-bar a.active {
  color: var(--color-primary);
  background: rgba(74, 222, 128, 0.15);
}

/* --- 卡片网格（首页用） --- */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 24px;
  max-width: 1100px;
  margin: 0 auto;
}

/* --- 卡片（通用） --- */
.card {
  display: block;
  background: var(--color-card-bg);
  border: 1px solid var(--color-card-border);
  border-radius: var(--radius);
  padding: 28px 20px;
  text-decoration: none;
  color: var(--color-text);
  box-shadow: var(--shadow);
  transition: all 0.3s ease;
  cursor: pointer;
}

.card:hover {
  transform: translateY(-6px) scale(1.02);
  border-color: var(--color-card-hover-border);
  box-shadow: 0 12px 40px var(--color-glow);
}

.card:active {
  transform: translateY(-2px) scale(0.98);
}

.card-icon {
  font-size: 3rem;
  display: block;
  margin-bottom: 12px;
}

.card h3 {
  font-size: 1.3rem;
  margin-bottom: 8px;
  color: var(--color-primary);
}

.card p {
  font-size: 0.92rem;
  color: var(--color-text-dim);
  line-height: 1.5;
}

/* --- 按钮 --- */
.btn {
  display: inline-block;
  padding: 10px 24px;
  border: none;
  border-radius: 10px;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.25s ease;
  text-decoration: none;
  font-family: var(--font-stack);
}

.btn-primary {
  background: linear-gradient(135deg, var(--color-primary), #22c55e);
  color: #0a1628;
}

.btn-primary:hover {
  transform: scale(1.05);
  box-shadow: 0 4px 20px rgba(74, 222, 128, 0.4);
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.1);
  color: var(--color-text);
  border: 1px solid rgba(255, 255, 255, 0.15);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.18);
  transform: scale(1.05);
}

.btn-danger {
  background: linear-gradient(135deg, var(--color-accent), #dc2626);
  color: #fff;
}

.btn-danger:hover {
  transform: scale(1.05);
  box-shadow: 0 4px 20px rgba(239, 68, 68, 0.4);
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none !important;
}

/* --- 页面容器 --- */
.page-container {
  max-width: 900px;
  margin: 0 auto;
  padding: 20px 0;
}

/* --- 内容卡片（子页面内部用） --- */
.content-card {
  background: var(--color-card-bg);
  border: 1px solid var(--color-card-border);
  border-radius: var(--radius);
  padding: 28px 24px;
  margin-bottom: 24px;
  box-shadow: var(--shadow);
}

.content-card h2 {
  font-size: 1.5rem;
  color: var(--color-primary);
  margin-bottom: 16px;
}

.content-card p,
.content-card li {
  color: var(--color-text-dim);
  font-size: 0.95rem;
  line-height: 1.7;
}

/* --- 表单控件 --- */
select, input[type="text"], input[type="number"], textarea {
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 10px;
  padding: 10px 14px;
  color: var(--color-text);
  font-size: 0.95rem;
  font-family: var(--font-stack);
  transition: border-color 0.25s ease;
  width: 100%;
}

select:focus, input:focus, textarea:focus {
  outline: none;
  border-color: var(--color-primary);
}

/* --- 响应式 --- */
@media (max-width: 600px) {
  body {
    padding: 12px;
  }

  .gradient-title {
    font-size: 1.8rem;
  }

  .card-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .card {
    padding: 20px 16px;
  }

  .nav-bar {
    gap: 6px;
  }

  .nav-bar a {
    font-size: 0.8rem;
    padding: 4px 10px;
  }
}

/* --- 工具类 --- */
.text-center { text-align: center; }
.mt-16 { margin-top: 16px; }
.mt-24 { margin-top: 24px; }
.mb-16 { margin-bottom: 16px; }
.mb-24 { margin-bottom: 24px; }
.flex-center { display: flex; justify-content: center; align-items: center; gap: 12px; }
.flex-wrap { flex-wrap: wrap; }