/* ===== base.css — 重置+变量+工具类（全局加载） ===== */

/* CSS变量 */
:root {
  --primary: #1B4332;
  --secondary: #E9C46A;
  --dark-bg: #0F2E22;
  --page-bg: #F0F5F2;
  --white: #FFFFFF;
  --text-dark: #333333;
  --text-gray: #666666;
  --border: #D0E0D5;
  --font-base: "Microsoft YaHei", "PingFang SC", Arial, sans-serif;
}

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

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

body {
  font-family: var(--font-base);
  color: var(--text-dark);
  background-color: var(--page-bg);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

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

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

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

ul, ol {
  list-style: none;
}

h1, h2, h3, h4, h5, h6 {
  font-weight: 600;
  line-height: 1.3;
  color: var(--text-dark);
}

/* 工具类 */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

.flex {
  display: -webkit-box;
  display: -webkit-flex;
  display: -ms-flexbox;
  display: flex;
}

.flex-wrap {
  -webkit-flex-wrap: wrap;
  -ms-flex-wrap: wrap;
  flex-wrap: wrap;
}

.items-center {
  -webkit-box-align: center;
  -webkit-align-items: center;
  -ms-flex-align: center;
  align-items: center;
}

.justify-between {
  -webkit-box-pack: justify;
  -webkit-justify-content: space-between;
  -ms-flex-pack: justify;
  justify-content: space-between;
}

.justify-center {
  -webkit-box-pack: center;
  -webkit-justify-content: center;
  -ms-flex-pack: center;
  justify-content: center;
}

.text-center {
  text-align: center;
}

.hidden {
  display: none;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0,0,0,0);
  border: 0;
}

/* 按钮 */
.btn {
  display: inline-block;
  padding: 12px 32px;
  border-radius: 4px;
  font-size: 15px;
  cursor: pointer;
  -webkit-transition: all 0.3s ease;
  transition: all 0.3s ease;
  border: none;
  font-family: var(--font-base);
}

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

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

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

.btn-secondary:hover {
  background-color: #d4b05a;
  color: var(--dark-bg);
}

/* 卡片 */
.card {
  background: var(--white);
  border-radius: 8px;
  padding: 24px;
  border: 1px solid var(--border);
  -webkit-transition: -webkit-box-shadow 0.3s ease;
  transition: box-shadow 0.3s ease;
}

.card:hover {
  -webkit-box-shadow: 0 4px 20px rgba(27,67,50,0.1);
  box-shadow: 0 4px 20px rgba(27,67,50,0.1);
}

/* 清除浮动 */
.clearfix::after {
  content: "";
  display: table;
  clear: both;
}