/* 优化字体配置 - 2020年后产品兼容性 ERP 字体栈 (Windows 10+, macOS 10.15+, iOS 13+, Android 10+) */
:root {
  --main-font: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto,
    'Microsoft YaHei UI', 'PingFang SC', 'Hiragino Sans GB', 'Noto Sans SC', 'Helvetica Neue', Arial,
    sans-serif;
}

body {
  font-family: var(--main-font);
  color: var(--main-color);
  line-height: 1.6; /* 增加行高，提升阅读舒适度 */
  letter-spacing: 0.01em; /* 微调字间距 */
  -webkit-font-smoothing: antialiased; /* 抗锯齿优化 */
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  background: linear-gradient(135deg, #f5f7fa 0%, #e4edf5 100%);
  min-height: 100vh;
  padding-bottom: 80px;
  font-size: 18px;
}

/* page header (shared) */
.page-header {
  position: relative;
  padding: 20px 0;
  margin: 0 0 20px 0;
  background: linear-gradient(135deg, #6ab1e8 0%, #2c6bc9 100%);
  color: white;
  border-bottom: 1px solid var(--border-color);
  border-radius: 4px;
  text-align: center;
  height: 108px;
}

/* footer (shared) */
.footer {
  position: fixed;
  bottom: 0;
  left: 0;
  text-align: center;
  width: 100%;
  background: rgba(255, 255, 255, 0.95);
  color: #666;
  border-top: 1px solid #e0e0e0;
  padding-top: 10px;
  font-size: 13px;
  word-break: break-all;
  z-index: 100; /* 确保 footer 在其他元素之上 */
}

/** 卡片阴影效果（统一样式） */
.panel,
.table-card,
.quotation-paper,
.form-card {
  background: white;
  border-radius: 8px;
  box-shadow: var(--card-shadow);
  overflow: hidden;
  margin-bottom: 25px;
  transition: box-shadow 0.3s ease;
}

.panel:hover,
.table-card:hover,
.quotation-paper:hover,
.form-card:hover {
  box-shadow: 0 5px 20px rgba(0, 0, 0, 0.15);
}

/* Container for common laptop width */
.container,
.container-fluid,
.container-fixed,
.container-fixed-md,
.container-fixed-sm,
.container-fixed-xs {
  padding-right: 15px;
  padding-left: 15px;
  margin-right: auto;
  margin-left: auto;
  width: 100%;
}

/* 响应式容器宽度设定 - 遵循现代主流标准 (Bootstrap 5 规范) */
@media (min-width: 576px) {
  .container {
    max-width: 540px;
  }
}
@media (min-width: 768px) {
  .container {
    max-width: 720px;
  }
}
@media (min-width: 992px) {
  .container {
    max-width: 960px;
  }
}
@media (min-width: 1200px) {
  .container {
    max-width: 1140px;
  }
}
@media (min-width: 1400px) {
  .container {
    max-width: 1320px;
  }
}
/* 针对 1920*1080 屏幕的适配 */
@media (min-width: 1920px) {
  .container {
    max-width: 1566px;
  }
}
/* 针对 2560*1440 屏幕的适配 */
@media (min-width: 2560px) {
  .container {
    max-width: 1688px;
  }
}