/* ============================================
   grid.css - 自有轻量栅格系统（替代 Bootstrap 栅格）
   1680px 主题宽度，12列，带响应式断点
   ============================================ */

.container {
  width: 100%;
  max-width: 16.8rem;
  margin: 0 auto;
  padding: 0 0.2rem;
}

.container-fluid {
  width: 100%;
  padding: 0 0.2rem;
}

/* 行 */
.row {
  display: flex;
  flex-wrap: wrap;
  margin-left: -0.1rem;
  margin-right: -0.1rem;
}

/* 列基础 */
[class*="col-"] {
  padding-left: 0.1rem;
  padding-right: 0.1rem;
  box-sizing: border-box;
}

/* 12列栅格 */
.col-1  { width: 8.333%; }
.col-2  { width: 16.666%; }
.col-3  { width: 25%; }
.col-4  { width: 33.333%; }
.col-5  { width: 41.666%; }
.col-6  { width: 50%; }
.col-7  { width: 58.333%; }
.col-8  { width: 66.666%; }
.col-9  { width: 75%; }
.col-10 { width: 83.333%; }
.col-11 { width: 91.666%; }
.col-12 { width: 100%; }

/* 间距工具 */
.gap-1 { gap: 0.1rem; }
.gap-2 { gap: 0.2rem; }
.gap-3 { gap: 0.3rem; }
.gap-4 { gap: 0.4rem; }

/* Flex 工具 */
.d-flex { display: flex; }
.flex-wrap { flex-wrap: wrap; }
.flex-column { flex-direction: column; }
.justify-content-center { justify-content: center; }
.justify-content-between { justify-content: space-between; }
.justify-content-around { justify-content: space-around; }
.align-items-center { align-items: center; }
.align-items-start { align-items: flex-start; }
.align-items-end { align-items: flex-end; }
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

/* 显示/隐藏 */
.d-none { display: none !important; }
.d-block { display: block !important; }

/* 间距工具 */
.mt-1 { margin-top: 0.1rem; }
.mt-2 { margin-top: 0.2rem; }
.mt-3 { margin-top: 0.3rem; }
.mt-4 { margin-top: 0.4rem; }
.mt-5 { margin-top: 0.5rem; }
.mb-1 { margin-bottom: 0.1rem; }
.mb-2 { margin-bottom: 0.2rem; }
.mb-3 { margin-bottom: 0.3rem; }
.mb-4 { margin-bottom: 0.4rem; }
.mb-5 { margin-bottom: 0.5rem; }
.pt-1 { padding-top: 0.1rem; }
.pt-2 { padding-top: 0.2rem; }
.pt-3 { padding-top: 0.3rem; }
.pt-4 { padding-top: 0.4rem; }
.pt-5 { padding-top: 0.5rem; }
.pb-1 { padding-bottom: 0.1rem; }
.pb-2 { padding-bottom: 0.2rem; }
.pb-3 { padding-bottom: 0.3rem; }
.pb-4 { padding-bottom: 0.4rem; }
.pb-5 { padding-bottom: 0.5rem; }

/* 响应式断点 */
@media (max-width: 1280px) {
  html { font-size: 90px; }
  .col-lg-1  { width: 8.333%; }
  .col-lg-2  { width: 16.666%; }
  .col-lg-3  { width: 25%; }
  .col-lg-4  { width: 33.333%; }
  .col-lg-6  { width: 50%; }
  .col-lg-8  { width: 66.666%; }
  .col-lg-12 { width: 100%; }
}

@media (max-width: 1024px) {
  html { font-size: 80px; }
  .col-md-3 { width: 25%; }
  .col-md-4 { width: 33.333%; }
  .col-md-6 { width: 50%; }
  .col-md-12 { width: 100%; }
  .d-md-none { display: none !important; }
  .d-md-block { display: block !important; }
}

@media (max-width: 768px) {
  html { font-size: 60px; }
  .col-sm-6 { width: 50%; }
  .col-sm-12 { width: 100%; }
  .d-sm-none { display: none !important; }
  .d-sm-block { display: block !important; }
}

@media (max-width: 480px) {
  html { font-size: 50px; }
  .col-xs-12 { width: 100%; }
}