/* 歇口气 · 全站基础样式 */
:root {
  --green-deep: #15803D;
  --green-deeper: #136534;
  --green-soft: #4ADE80;
  --green-mist: #DCFCE7;
  --bg: #F7FAF7;
  --card: #FFFFFF;
  --text: #29382E;
  --text-muted: #66756B;
  --border: #E2ECE3;
  --shadow: 0 2px 12px rgba(21, 128, 61, 0.08);
  --radius: 12px;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }

body {
  font-family: -apple-system, "PingFang SC", "Microsoft YaHei", sans-serif;
  background: var(--bg);
  color: var(--text);
  font-size: 16px;
  line-height: 1.75;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

a { color: var(--green-deep); }

/* —— 顶部导航 —— */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(255, 255, 255, 0.94);
  border-bottom: 1px solid var(--border);
  backdrop-filter: blur(6px);
}

.header-inner {
  max-width: 960px;
  margin: 0 auto;
  padding: 10px 16px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 6px;
}

.brand {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--green-deep);
  text-decoration: none;
  letter-spacing: 1px;
}

.main-nav { display: flex; flex-wrap: wrap; gap: 2px; }

.main-nav a {
  padding: 5px 10px;
  border-radius: 8px;
  font-size: 0.92rem;
  color: var(--text-muted);
  text-decoration: none;
  white-space: nowrap;
}

.main-nav a:hover { background: var(--green-mist); color: var(--green-deep); }

.main-nav a.active {
  background: var(--green-mist);
  color: var(--green-deep);
  font-weight: 600;
}

/* —— 主体 —— */
.container {
  width: 100%;
  max-width: 960px;
  margin: 0 auto;
  padding: 28px 16px 48px;
  flex: 1;
}

.page-title { font-size: 1.6rem; line-height: 1.4; margin-bottom: 8px; }

.page-sub { color: var(--text-muted); margin-bottom: 24px; }

.card {
  background: var(--card);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 20px;
}

/* —— 按钮 —— */
.btn {
  display: inline-block;
  background: var(--green-deep);
  color: #FFFFFF;
  border: 1px solid var(--green-deep);
  border-radius: 999px;
  padding: 10px 26px;
  font-size: 1rem;
  font-family: inherit;
  line-height: 1.5;
  cursor: pointer;
  text-decoration: none;
  transition: background 0.2s ease, transform 0.1s ease;
}

.btn:hover { background: var(--green-deeper); }

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

.btn-ghost {
  background: transparent;
  color: var(--green-deep);
  border-color: var(--green-deep);
}

.btn-ghost:hover { background: var(--green-mist); }

.btn-small { padding: 5px 14px; font-size: 0.88rem; }

/* —— 页脚 —— */
.site-footer {
  border-top: 1px solid var(--border);
  background: #FFFFFF;
  padding: 24px 16px 32px;
  text-align: center;
}

.disclaimer {
  max-width: 640px;
  margin: 0 auto 12px;
  font-size: 0.85rem;
  color: var(--text-muted);
}

.footer-meta { font-size: 0.85rem; color: var(--text-muted); margin-bottom: 6px; }

.footer-back a { font-size: 0.9rem; text-decoration: none; }

.footer-back a:hover { text-decoration: underline; }

.hidden { display: none !important; }

/* —— 响应式 —— */
@media (max-width: 600px) {
  .page-title { font-size: 1.35rem; }
  .header-inner { justify-content: center; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
}