/* --- 第三版：现代简约风格 --- */

:root {
  --primary-color: #2c3e50;    /* 深沉的基准色 */
  --accent-color: #5a6c7d;     /* 辅助灰色 */
  --bg-color: #f9fafb;         /* 极淡的背景色 */
  --card-bg: #ffffff;
  --text-main: #333d47;
  --text-muted: #6b7280;
  --border-color: #eaecef;
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans", "Microsoft YaHei", sans-serif;
  background-color: var(--bg-color);
  color: var(--text-main);
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
}

/* 导航栏升级：增加阴影和呼吸感 */
header {
  background-color: var(--card-bg);
  border-bottom: 1px solid var(--border-color);
  box-shadow: 0 2px 4px rgba(0,0,0,0.02);
  position: sticky;
  top: 0;
  z-index: 100;
}

nav {
  max-width: 1000px;
  margin: 0 auto;
  padding: 20px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

nav .title {
  font-weight: 700;
  font-size: 1.15rem;
  color: var(--primary-color);
  letter-spacing: 0.5px;
}

nav a {
  margin-left: 24px;
  text-decoration: none;
  color: var(--text-muted);
  font-size: 0.9rem;
  font-weight: 500;
  transition: color 0.2s ease;
}

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

/* 容器升级：增加垂直间距 */
.container {
  max-width: 800px;
  margin: 40px auto;
  padding: 60px 40px;
  background-color: var(--card-bg);
  border-radius: 12px;
  box-shadow: 0 4px 20px rgba(0,0,0,0.03);
}

h1 {
  font-size: 2.2rem;
  margin-bottom: 24px;
  color: var(--primary-color);
  font-weight: 700;
  letter-spacing: -0.5px;
}

p {
  margin-bottom: 20px;
  font-size: 1.05rem;
}

/* 信息框升级：卡片化 */
.info-box {
  background-color: #f8fafc;
  border: 1px solid var(--border-color);
  border-left: 4px solid var(--primary-color); /* 强调条 */
  padding: 24px;
  margin: 32px 0;
  border-radius: 6px;
}

.info-box strong {
  display: block;
  margin-bottom: 8px;
  color: var(--primary-color);
  font-size: 1.1rem;
}

/* 地图容器适配 */
.map-container {
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 2px 10px rgba(0,0,0,0.08);
    margin: 25px 0;
}

.btn-map {
    display: inline-block;
    padding: 12px 24px;
    background-color: var(--primary-color);
    color: white !important;
    text-decoration: none;
    border-radius: 6px;
    font-weight: 500;
    transition: transform 0.2s;
}

.btn-map:hover {
    transform: translateY(-1px);
    background-color: #1a252f;
}

footer {
  text-align: center;
  padding: 60px 20px;
  color: var(--text-muted);
  font-size: 0.85rem;
  line-height: 2;
}