/* ============================================================
   拾光 · 全局样式系统
   配色：米白底 + 鼠尾草绿 + 暖棕（治愈自然风）
   ============================================================ */

/* ---------- CSS 变量 ---------- */
:root {
  /* 主色调 - 鼠尾草绿 */
  --color-primary: #7A9A6B;
  --color-primary-light: #A8C4A8;
  --color-primary-lighter: #D4E0C4;
  --color-primary-bg: #E8EDE0;
  --color-primary-dark: #5A7D4A;

  /* 辅助色 - 暖棕 */
  --color-accent: #B8845A;
  --color-accent-light: #D4A574;
  --color-accent-lighter: #E8C4A0;
  --color-accent-bg: #F5EFE6;

  /* 中性色 - 米白/米灰 */
  --color-bg: #F5F2EA;
  --color-bg-warm: #FAF8F2;
  --color-surface: #FFFFFF;
  --color-border: #E8E4D8;
  --color-border-light: #F0EDE4;

  /* 文字色 */
  --color-text: #4A4840;
  --color-text-secondary: #6B6858;
  --color-text-muted: #8A8578;
  --color-text-light: #A0A890;
  --color-text-faint: #B0ACA0;

  /* 阴影 */
  --shadow-sm: 0 1px 4px rgba(122, 154, 107, 0.06);
  --shadow-md: 0 2px 12px rgba(122, 154, 107, 0.08);
  --shadow-lg: 0 8px 24px rgba(122, 154, 107, 0.1);
  --shadow-hover: 0 6px 20px rgba(122, 154, 107, 0.12);

  /* 圆角 */
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 14px;
  --radius-xl: 20px;
  --radius-full: 999px;

  /* 间距 */
  --space-xs: 4px;
  --space-sm: 8px;
  --space-md: 16px;
  --space-lg: 24px;
  --space-xl: 32px;
  --space-2xl: 48px;

  /* 字体 */
  --font-serif: 'STKaiti', 'KaiTi', 'Noto Serif SC', 'Songti SC', serif;
  --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC',
    'Microsoft YaHei', 'Hiragino Sans GB', sans-serif;

  /* 过渡 */
  --transition-fast: 0.15s ease;
  --transition-normal: 0.25s ease;
  --transition-slow: 0.4s ease;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-sans);
  font-size: 15px;
  line-height: 1.7;
  color: var(--color-text);
  background: var(--color-bg);
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

a:hover {
  color: var(--color-primary);
}

img {
  max-width: 100%;
  display: block;
}

ul, ol {
  list-style: none;
}

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
}

input, textarea, select {
  font-family: inherit;
  font-size: inherit;
  outline: none;
}

/* ---------- 通用容器 ---------- */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--space-lg);
}

.container-narrow {
  max-width: 800px;
  margin: 0 auto;
  padding: 0 var(--space-lg);
}

/* ---------- 导航栏 ---------- */
.navbar {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--color-bg);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid transparent;
  transition: all var(--transition-normal);
}

.navbar.scrolled {
  border-bottom-color: var(--color-border);
  box-shadow: var(--shadow-sm);
}

.navbar-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 72px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 12px;
  cursor: pointer;
}

.logo-icon {
  position: relative;
  width: 36px;
  height: 36px;
  flex-shrink: 0;
}

.logo-icon .leaf-green {
  position: absolute;
  right: 2px;
  bottom: 2px;
  width: 20px;
  height: 28px;
  background: var(--color-primary);
  border-radius: 50% 50% 0 50%;
  transform: rotate(15deg);
}

.logo-icon .leaf-brown {
  position: absolute;
  left: 0;
  bottom: 4px;
  width: 16px;
  height: 24px;
  background: var(--color-accent);
  border-radius: 50% 50% 50% 0;
  transform: rotate(-30deg);
}

.logo-text {
  font-family: var(--font-serif);
  font-size: 26px;
  font-weight: 500;
  color: var(--color-text);
  letter-spacing: 4px;
}

.nav-links {
  display: flex;
  gap: 4px;
  align-items: center;
}

.nav-link {
  padding: 8px 20px;
  font-size: 15px;
  color: var(--color-text-muted);
  border-radius: var(--radius-full);
  transition: all var(--transition-fast);
  white-space: nowrap;
}

.nav-link:hover {
  color: var(--color-primary-dark);
  background: var(--color-primary-bg);
}

.nav-link.active {
  color: var(--color-primary-dark);
  background: var(--color-primary-bg);
  font-weight: 500;
}

/* ---------- 页面头部装饰 ---------- */
.page-hero {
  position: relative;
  overflow: hidden;
  padding: var(--space-2xl) 0;
}

.page-hero::before {
  content: '';
  position: absolute;
  top: -100px;
  right: -100px;
  width: 320px;
  height: 320px;
  background: var(--color-primary-lighter);
  border-radius: 50%;
  opacity: 0.3;
}

.page-hero::after {
  content: '';
  position: absolute;
  bottom: -80px;
  left: -80px;
  width: 220px;
  height: 220px;
  background: var(--color-accent-lighter);
  border-radius: 50%;
  opacity: 0.25;
}

/* ---------- 每日诗词区 ---------- */
.daily-poem {
  text-align: center;
  position: relative;
  z-index: 10;
  padding: var(--space-lg) 0;
}

.daily-poem .label {
  font-size: 13px;
  color: var(--color-text-light);
  letter-spacing: 3px;
  margin-bottom: 16px;
}

.daily-poem .poem-text {
  font-family: var(--font-serif);
  font-size: 28px;
  font-weight: 400;
  color: var(--color-text);
  line-height: 1.8;
  margin-bottom: 12px;
}

.daily-poem .poem-author {
  font-size: 13px;
  color: var(--color-text-muted);
}

.daily-poem .poem-date {
  margin-top: 18px;
  font-size: 12px;
  color: var(--color-text-faint);
}

/* ---------- 页面标题 ---------- */
.page-title {
  text-align: center;
  position: relative;
  z-index: 10;
  padding: var(--space-xl) 0;
}

.page-title h1 {
  font-family: var(--font-serif);
  font-size: 32px;
  font-weight: 500;
  color: var(--color-text);
  letter-spacing: 6px;
  margin-bottom: 12px;
}

.page-title .subtitle {
  font-size: 14px;
  color: var(--color-text-light);
}

/* ---------- 卡片通用 ---------- */
.card {
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  transition: all var(--transition-normal);
  overflow: hidden;
}

.card:hover {
  box-shadow: var(--shadow-hover);
  transform: translateY(-2px);
}

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 10px 22px;
  font-size: 14px;
  border-radius: var(--radius-full);
  transition: all var(--transition-fast);
  white-space: nowrap;
  cursor: pointer;
  border: 1px solid transparent;
}

.btn-primary {
  background: var(--color-primary);
  color: white;
}

.btn-primary:hover {
  background: var(--color-primary-dark);
  color: white;
}

.btn-accent {
  background: var(--color-accent);
  color: white;
}

.btn-accent:hover {
  background: #A6754D;
  color: white;
}

.btn-outline {
  background: transparent;
  border-color: var(--color-border);
  color: var(--color-text-secondary);
}

.btn-outline:hover {
  border-color: var(--color-primary);
  color: var(--color-primary-dark);
  background: var(--color-primary-bg);
}

.btn-ghost {
  background: var(--color-primary-bg);
  color: var(--color-primary-dark);
}

.btn-ghost:hover {
  background: var(--color-primary-lighter);
}

.btn-sm {
  padding: 6px 16px;
  font-size: 13px;
}

.btn-lg {
  padding: 14px 32px;
  font-size: 16px;
}

/* ---------- 标签 ---------- */
.tag {
  display: inline-block;
  padding: 3px 10px;
  font-size: 12px;
  border-radius: var(--radius-full);
  background: var(--color-primary-bg);
  color: var(--color-primary-dark);
}

.tag-accent {
  background: var(--color-accent-bg);
  color: var(--color-accent);
}

.tag-gray {
  background: var(--color-border-light);
  color: var(--color-text-muted);
}

/* ---------- 底部 ---------- */
.footer {
  margin-top: var(--space-2xl);
  padding: var(--space-xl) 0 var(--space-lg);
  border-top: 1px solid var(--color-border);
  text-align: center;
  font-size: 13px;
  color: var(--color-text-light);
}

.footer .footer-links {
  display: flex;
  justify-content: center;
  gap: var(--space-lg);
  margin-bottom: var(--space-md);
}

.footer .footer-links a {
  color: var(--color-text-muted);
}

.footer .footer-links a:hover {
  color: var(--color-primary);
}

.footer .copyright {
  font-size: 12px;
  color: var(--color-text-faint);
}

/* ---------- 响应式 ---------- */
@media (max-width: 768px) {
  .navbar-inner {
    height: 60px;
  }

  .logo-text {
    font-size: 22px;
  }

  .nav-links {
    gap: 0;
    overflow-x: auto;
    max-width: 60%;
    -webkit-overflow-scrolling: touch;
  }

  .nav-link {
    padding: 6px 14px;
    font-size: 14px;
  }

  .daily-poem .poem-text {
    font-size: 22px;
  }

  .page-title h1 {
    font-size: 26px;
  }

  .container {
    padding: 0 var(--space-md);
  }
}

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

.fade-in-up {
  animation: fadeInUp 0.6s ease-out;
}

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-8px); }
}