/* ============================================
   端午游园会 — 共享样式表
   所有页面共用，改一处全站变
   ============================================ */

/* ---------- CSS 自定义属性（主题色） ---------- */
:root {
  --color-primary: #2d6a4f;       /* 粽叶绿 */
  --color-primary-light: #40916c;
  --color-accent: #d00000;        /* 龙舟红 */
  --color-accent-light: #e63946;
  --color-gold: #f4a261;
  --color-rice: #fefae0;          /* 糯米白 */
  --color-bg-start: #0a1a12;      /* 深绿渐变起点 */
  --color-bg-end: #0d1b2a;        /* 墨蓝渐变终点 */
  --color-surface: rgba(255, 255, 255, 0.06);
  --color-surface-hover: rgba(255, 255, 255, 0.12);
  --color-text: #e8e8e8;
  --color-text-dim: #a0a8b0;
  --color-border: rgba(255, 255, 255, 0.1);
  --radius: 16px;
  --radius-sm: 10px;
  --shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC",
               "Microsoft YaHei", "Noto Sans SC", sans-serif;
  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（首页大标题专用） ---------- */
.gradient-title {
  font-size: clamp(2rem, 6vw, 3.5rem);
  font-weight: 900;
  background: linear-gradient(135deg, var(--color-rice), var(--color-gold), var(--color-accent-light));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  text-align: center;
  margin-bottom: 8px;
}

.gradient-sub {
  font-size: clamp(0.9rem, 2.5vw, 1.2rem);
  color: var(--color-text-dim);
  text-align: center;
  margin-bottom: 32px;
}

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

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

.nav-bar a:hover {
  color: var(--color-rice);
  background: var(--color-surface-hover);
}

/* ---------- 卡片网格（首页导航） ---------- */
.nav-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 24px;
  max-width: 960px;
  margin: 0 auto;
  padding: 0 12px;
}

.nav-card {
  background: var(--color-surface);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 32px 24px;
  text-align: center;
  text-decoration: none;
  color: var(--color-text);
  transition: var(--transition);
  cursor: pointer;
  position: relative;
  overflow: hidden;
}

.nav-card::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(circle, rgba(255,255,255,0.04) 0%, transparent 70%);
  opacity: 0;
  transition: opacity 0.4s;
}

.nav-card:hover {
  transform: translateY(-6px) scale(1.02);
  background: var(--color-surface-hover);
  border-color: var(--color-primary-light);
  box-shadow: var(--shadow);
}

.nav-card:hover::before {
  opacity: 1;
}

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

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

.nav-card h3 {
  font-size: 1.3rem;
  margin-bottom: 6px;
  color: var(--color-rice);
}

.nav-card p {
  font-size: 0.85rem;
  color: var(--color-text-dim);
  line-height: 1.5;
}

/* ---------- 通用卡片（子页面内容） ---------- */
.card {
  background: var(--color-surface);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 28px 24px;
  margin-bottom: 20px;
  transition: var(--transition);
}

.card:hover {
  border-color: var(--color-primary-light);
}

/* ---------- 按钮 ---------- */
.btn {
  display: inline-block;
  padding: 10px 28px;
  border: none;
  border-radius: 30px;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
  text-decoration: none;
  color: #fff;
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-light));
}

.btn:hover {
  transform: translateY(-2px) scale(1.04);
  box-shadow: 0 6px 20px rgba(45, 106, 79, 0.4);
}

.btn:active {
  transform: translateY(0) scale(0.98);
}

.btn-accent {
  background: linear-gradient(135deg, var(--color-accent), var(--color-accent-light));
}

.btn-accent:hover {
  box-shadow: 0 6px 20px rgba(208, 0, 0, 0.4);
}

.btn-gold {
  background: linear-gradient(135deg, #e07c2e, var(--color-gold));
  color: #1a1a1a;
}

/* ---------- 返回首页链接 ---------- */
.back-home {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--color-text-dim);
  text-decoration: none;
  font-size: 0.9rem;
  margin-bottom: 20px;
  transition: var(--transition);
}

.back-home:hover {
  color: var(--color-rice);
  gap: 10px;
}

/* ---------- 页面容器 ---------- */
.page-container {
  max-width: 900px;
  margin: 0 auto;
  padding: 0 12px;
}

/* ---------- 页脚 ---------- */
footer {
  text-align: center;
  padding: 32px 0 12px;
  color: var(--color-text-dim);
  font-size: 0.8rem;
  border-top: 1px solid var(--color-border);
  margin-top: 40px;
}

/* ---------- 响应式 ---------- */
@media (max-width: 600px) {
  body { padding: 12px; }
  .nav-grid { grid-template-columns: 1fr; gap: 16px; }
  .nav-card { padding: 24px 16px; }
  .card { padding: 20px 16px; }
}