/* ============================================
   端午传统文化科普网站 - 通用样式表
   新中式国风 · 青绿雅致 · 响应式适配
   ============================================ */

/* --- CSS 自定义属性（主题色） --- */
:root {
  --color-primary: #2d6a4f;
  --color-primary-light: #40916c;
  --color-primary-dark: #1b4332;
  --color-bg: #0d1f1a;
  --color-bg-card: #162b24;
  --color-bg-elevated: #1e362e;
  --color-accent: #8b3a3a;
  --color-accent-light: #b5544a;
  --color-gold: #c9a84c;
  --color-text: #e8e0d0;
  --color-text-secondary: #b8b0a0;
  --color-text-muted: #8a8272;
  --color-border: #2d4a3f;
  --color-white: #f5efe0;
  --font-sans: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Noto Serif SC", serif, sans-serif;
  --shadow-sm: 0 2px 8px rgba(0,0,0,0.3);
  --shadow-md: 0 4px 20px rgba(0,0,0,0.4);
  --shadow-lg: 0 8px 40px rgba(0,0,0,0.5);
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

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

body {
  font-family: var(--font-sans);
  background: linear-gradient(135deg, #0a1a14 0%, #0d1f1a 30%, #122820 60%, #0d1f1a 100%);
  color: var(--color-text);
  line-height: 1.7;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}

/* --- 滚动条美化 --- */
::-webkit-scrollbar { width: 8px; }
::-webkit-scrollbar-track { background: var(--color-bg); }
::-webkit-scrollbar-thumb { background: var(--color-border); border-radius: 4px; }
::-webkit-scrollbar-thumb:hover { background: var(--color-primary); }

/* --- 链接 --- */
a {
  color: var(--color-gold);
  text-decoration: none;
  transition: color var(--transition);
}
a:hover { color: var(--color-white); }

/* --- 导航栏 --- */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(13, 31, 26, 0.92);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--color-border);
  padding: 0 24px;
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.navbar-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--color-white);
  letter-spacing: 2px;
}
.navbar-logo .logo-icon {
  width: 36px;
  height: 36px;
  background: linear-gradient(135deg, var(--color-primary), var(--color-gold));
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
}

.navbar-links {
  display: flex;
  gap: 6px;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: none;
  -ms-overflow-style: none;
}
.navbar-links::-webkit-scrollbar { display: none; }

.navbar-links a {
  color: var(--color-text-secondary);
  padding: 8px 14px;
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  white-space: nowrap;
  transition: all var(--transition);
}
.navbar-links a:hover,
.navbar-links a.active {
  color: var(--color-white);
  background: rgba(45, 106, 79, 0.3);
}

.navbar-toggle {
  display: none;
  background: none;
  border: 1px solid var(--color-border);
  color: var(--color-text);
  width: 40px;
  height: 40px;
  border-radius: var(--radius-sm);
  font-size: 1.3rem;
  cursor: pointer;
  transition: all var(--transition);
}
.navbar-toggle:hover {
  background: var(--color-bg-card);
  border-color: var(--color-primary);
}

/* --- 主内容容器 --- */
.main-content {
  padding-top: 80px;
  max-width: 1200px;
  margin: 0 auto;
  padding-left: 24px;
  padding-right: 24px;
  padding-bottom: 60px;
}

/* --- 页面标题 --- */
.page-header {
  text-align: center;
  padding: 40px 0 32px;
}
.page-header h1 {
  font-size: 2.4rem;
  font-weight: 800;
  background: linear-gradient(135deg, var(--color-white), var(--color-gold));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  letter-spacing: 4px;
  margin-bottom: 12px;
}
.page-header .subtitle {
  color: var(--color-text-secondary);
  font-size: 1rem;
  max-width: 600px;
  margin: 0 auto;
  line-height: 1.6;
}

/* --- 卡片通用 --- */
.card {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 24px;
  transition: all var(--transition);
}
.card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: var(--color-primary-light);
}

/* --- 按钮 --- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 24px;
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  border: 1px solid transparent;
  transition: all var(--transition);
  font-family: var(--font-sans);
}
.btn-primary {
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
  color: var(--color-white);
  border-color: var(--color-primary-light);
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 16px rgba(45, 106, 79, 0.4);
}
.btn-secondary {
  background: transparent;
  color: var(--color-gold);
  border-color: var(--color-gold);
}
.btn-secondary:hover {
  background: rgba(201, 168, 76, 0.1);
  transform: translateY(-2px);
}
.btn-accent {
  background: linear-gradient(135deg, var(--color-accent), #6d2e2e);
  color: var(--color-white);
  border-color: var(--color-accent-light);
}
.btn-accent:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 16px rgba(139, 58, 58, 0.4);
}
.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none !important;
}

/* --- 网格布局 --- */
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }

/* --- 仿古卷轴容器 --- */
.scroll-container {
  position: relative;
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  display: flex;
  gap: 24px;
  padding: 20px 8px;
  scroll-behavior: smooth;
  -webkit-overflow-scrolling: touch;
}
.scroll-container::-webkit-scrollbar { height: 6px; }
.scroll-container::-webkit-scrollbar-thumb { background: var(--color-gold); border-radius: 3px; }
.scroll-item {
  flex: 0 0 320px;
  scroll-snap-align: start;
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 24px;
  transition: all var(--transition);
  min-height: 200px;
}
.scroll-item:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: var(--color-primary-light);
}

/* --- 时间轴 --- */
.timeline {
  position: relative;
  padding-left: 40px;
}
.timeline::before {
  content: '';
  position: absolute;
  left: 16px;
  top: 0;
  bottom: 0;
  width: 2px;
  background: linear-gradient(to bottom, var(--color-gold), var(--color-primary), var(--color-accent));
}
.timeline-item {
  position: relative;
  padding: 20px 24px;
  margin-bottom: 24px;
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  transition: all var(--transition);
}
.timeline-item:hover {
  border-color: var(--color-primary-light);
  transform: translateX(4px);
}
.timeline-item::before {
  content: '';
  position: absolute;
  left: -32px;
  top: 28px;
  width: 14px;
  height: 14px;
  background: var(--color-gold);
  border-radius: 50%;
  border: 3px solid var(--color-bg);
}
.timeline-item .year {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--color-gold);
  margin-bottom: 6px;
}
.timeline-item h3 {
  font-size: 1.1rem;
  margin-bottom: 8px;
  color: var(--color-white);
}
.timeline-item p {
  color: var(--color-text-secondary);
  font-size: 0.9rem;
  line-height: 1.7;
}

/* --- 谚语卡片（每日一句） --- */
.proverb-card {
  background: linear-gradient(135deg, rgba(45, 106, 79, 0.15), rgba(139, 58, 58, 0.1));
  border: 1px solid var(--color-gold);
  border-radius: var(--radius-md);
  padding: 24px 32px;
  text-align: center;
  margin-bottom: 32px;
  position: relative;
}
.proverb-card .proverb-text {
  font-size: 1.3rem;
  color: var(--color-gold);
  font-weight: 600;
  letter-spacing: 2px;
  margin-bottom: 8px;
}
.proverb-card .proverb-source {
  color: var(--color-text-muted);
  font-size: 0.85rem;
}
.proverb-card .proverb-action {
  margin-top: 12px;
}
.proverb-card .proverb-action button {
  background: none;
  border: 1px solid var(--color-gold);
  color: var(--color-gold);
  padding: 6px 16px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-size: 0.85rem;
  transition: all var(--transition);
}
.proverb-card .proverb-action button:hover {
  background: rgba(201, 168, 76, 0.15);
}
.proverb-card .proverb-action button.lit {
  background: var(--color-gold);
  color: var(--color-bg);
}

/* --- 表单元素 --- */
input, textarea, select {
  width: 100%;
  padding: 12px 16px;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  color: var(--color-text);
  font-family: var(--font-sans);
  font-size: 0.95rem;
  transition: border-color var(--transition);
}
input:focus, textarea:focus, select:focus {
  outline: none;
  border-color: var(--color-primary-light);
  box-shadow: 0 0 0 3px rgba(45, 106, 79, 0.2);
}
textarea {
  resize: vertical;
  min-height: 100px;
}
label {
  display: block;
  margin-bottom: 6px;
  color: var(--color-text-secondary);
  font-size: 0.9rem;
  font-weight: 500;
}

/* --- 提示 Toast --- */
.toast {
  position: fixed;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%) translateY(80px);
  background: var(--color-bg-elevated);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: 12px 24px;
  color: var(--color-text);
  font-size: 0.9rem;
  opacity: 0;
  transition: all 0.4s ease;
  z-index: 9999;
  pointer-events: none;
}
.toast.show {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

/* --- 页脚 --- */
.footer {
  text-align: center;
  padding: 32px 24px;
  border-top: 1px solid var(--color-border);
  color: var(--color-text-muted);
  font-size: 0.85rem;
  margin-top: 40px;
}
.footer a {
  color: var(--color-gold);
}

/* --- 响应式 --- */
@media (max-width: 1024px) {
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .page-header h1 { font-size: 2rem; }
}

@media (max-width: 768px) {
  .navbar { padding: 0 16px; }
  .navbar-links {
    display: none;
    position: absolute;
    top: 64px;
    left: 0;
    right: 0;
    background: rgba(13, 31, 26, 0.98);
    backdrop-filter: blur(16px);
    flex-direction: column;
    padding: 16px;
    border-bottom: 1px solid var(--color-border);
    max-height: 70vh;
    overflow-y: auto;
  }
  .navbar-links.open { display: flex; }
  .navbar-links a { padding: 12px 16px; font-size: 0.95rem; }
  .navbar-toggle { display: flex; align-items: center; justify-content: center; }

  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
  .page-header h1 { font-size: 1.6rem; }
  .page-header { padding: 24px 0; }
  .main-content { padding-left: 16px; padding-right: 16px; }
  .scroll-item { flex: 0 0 280px; }
  .timeline { padding-left: 32px; }
  .timeline-item::before { left: -26px; width: 12px; height: 12px; }
}

@media (max-width: 480px) {
  html { font-size: 14px; }
  .navbar-logo { font-size: 1rem; }
  .navbar-logo .logo-icon { width: 30px; height: 30px; font-size: 0.9rem; }
  .scroll-item { flex: 0 0 240px; }
}