/* ============================================================
   九南科技商城 · 移动端抽屉样式（v6.0）
   顶条与标签胶囊的样式已移至 css/app.css。
   本文件仅保留移动端汉堡抽屉（.m-nav-*，DOM 由 common.js 注入）。
   ============================================================ */

/* 汉堡按钮：默认隐藏，≤992px 显示 */
.nav-toggle {
  display: none;
  position: relative;
  width: 26px;
  height: 20px;
  cursor: pointer;
  flex-shrink: 0;
  z-index: 1200;
}
.nav-toggle span {
  position: absolute;
  left: 0;
  width: 100%;
  height: 2px;
  background: var(--mh-text-1);
  transition: transform var(--mh-dur) var(--mh-ease),
              opacity var(--mh-dur) var(--mh-ease),
              top var(--mh-dur) var(--mh-ease);
}
.nav-toggle span:nth-child(1) { top: 0; }
.nav-toggle span:nth-child(2) { top: 9px; }
.nav-toggle span:nth-child(3) { top: 18px; }
body.nav-open .nav-toggle span { background: var(--mh-text-1); }
body.nav-open .nav-toggle span:nth-child(1) { top: 9px; transform: rotate(45deg); }
body.nav-open .nav-toggle span:nth-child(2) { opacity: 0; }
body.nav-open .nav-toggle span:nth-child(3) { top: 9px; transform: rotate(-45deg); }

/* 抽屉遮罩 */
.m-nav-overlay {
  position: fixed;
  inset: 0;
  background: rgba(26, 26, 26, 0.4);
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--mh-dur) var(--mh-ease), visibility var(--mh-dur);
  z-index: 1150;
}
body.nav-open .m-nav-overlay { opacity: 1; visibility: visible; }

/* 抽屉主体：暖白底 + 深墨字 */
.m-nav-drawer {
  position: fixed;
  top: 0;
  right: 0;
  width: min(300px, 84vw);
  height: 100%;
  background: var(--mh-bg-page);
  box-shadow: var(--mh-shadow-lg);
  border-left: 1px solid var(--mh-line);
  transform: translateX(100%);
  transition: transform var(--mh-dur) var(--mh-ease);
  z-index: 1160;
  display: flex;
  flex-direction: column;
  overflow-y: auto;
}
body.nav-open .m-nav-drawer { transform: translateX(0); }
.m-nav-head {
  padding: 18px 16px 14px;
  border-bottom: 1px solid var(--mh-line);
}
.m-nav-search {
  display: flex;
  align-items: center;
  height: 40px;
  background: var(--mh-bg-card);
  border: 1px solid var(--mh-border);
  border-radius: var(--mh-radius);
  padding: 0 10px 0 14px;
}
.m-nav-search input {
  flex: 1;
  border: none;
  background: transparent;
  outline: none;
  font-size: 16px;
  color: var(--mh-text-1);
  height: 100%;
  min-width: 0;
}
.m-nav-search input::placeholder { color: var(--mh-text-3); }
.m-nav-search .m-nav-search-btn {
  width: 26px;
  height: 26px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--mh-text-3);
  cursor: pointer;
  font-size: 15px;
  flex-shrink: 0;
}
.m-nav-search .m-nav-search-btn:hover { color: var(--mh-text-1); }
.m-nav-list { padding: 8px 0; flex: 1; }
.m-nav-section { padding: 4px 0; }
.m-nav-section + .m-nav-section { border-top: 1px solid var(--mh-line-soft); }
.m-nav-group-title {
  padding: 14px 20px 4px;
  font-size: 11px;
  color: var(--mh-text-3);
  letter-spacing: 2px;
  text-transform: uppercase;
  font-family: var(--mh-font-mono);
}
.m-nav-link {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 13px 20px;
  font-size: 15px;
  color: var(--mh-text-1);
  transition: background var(--mh-dur) var(--mh-ease), color var(--mh-dur) var(--mh-ease);
  text-decoration: none;
}
.m-nav-link:hover, .m-nav-link.is-active {
  color: var(--mh-primary);
  background: var(--mh-bg-card);
}
.m-nav-link .iconfont { font-size: 11px; color: var(--mh-text-4); }
.m-nav-sub { padding: 0 0 6px; background: var(--mh-bg-card); }
.m-nav-sub .m-nav-link { padding: 11px 20px 11px 36px; font-size: 14px; color: var(--mh-text-2); }
.m-nav-sub .m-nav-link:hover { background: var(--mh-bg-soft); }
.m-nav-link-sale { color: var(--mh-promo) !important; }
.m-nav-foot {
  padding: 16px;
  border-top: 1px solid var(--mh-line);
  display: flex;
  gap: 10px;
}
.m-nav-foot .btn { flex: 1; height: 42px; line-height: 42px; text-align: center; }
.m-nav-user {
  display: none;
  align-items: center;
  gap: 10px;
  padding: 6px 4px;
  width: 100%;
}
.m-nav-user .head-img {
  width: 36px; height: 36px; border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  color: #fff; font-weight: 600; flex-shrink: 0; font-size: 13px;
}
.m-nav-user .name { flex: 1; font-size: 14px; color: var(--mh-text-1); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.m-nav-user .m-nav-logout {
  color: var(--mh-text-3); cursor: pointer; font-size: 13px; padding: 6px 10px;
  border-radius: var(--mh-radius);
}
.m-nav-user .m-nav-logout:hover { color: var(--mh-promo); background: var(--mh-bg-card); }

/* ≤992px：启用移动端导航 */
@media screen and (max-width: 992px) {
  .nav-toggle { display: block; }
  .nav-search { display: none; }
  .nav-header { height: 56px; padding: 0 16px !important; }
  .tag-nav { top: 56px; }
  /* 顶栏购物车：窄屏仅保留购物袋图标 + 徽标，隐藏文字 */
  .nav-cart { padding: 0 11px; gap: 0; }
  .nav-cart-text { display: none; }
  /* 登录：窄屏压缩为紧凑胶囊（注册按钮移入移动端抽屉） */
  .no-login { gap: 6px; }
  .no-login .btn-normal { display: none; }
  .no-login .btn-normal-light { padding: 6px 14px; font-size: 12px; }
  .login-in .name { display: none; }
  .login-in .login-menu { display: none !important; }
  .login-in .head-img { width: 30px; height: 30px; }
}
@media screen and (max-width: 600px) {
  .nav-header { height: 52px; padding: 0 14px !important; }
  .tag-nav { top: 52px; }
  .nav-icon img { height: 24px; }
  .nav-toggle { width: 24px; height: 18px; }
  .nav-toggle span:nth-child(2) { top: 8px; }
  .nav-toggle span:nth-child(3) { top: 16px; }
  body.nav-open .nav-toggle span:nth-child(1),
  body.nav-open .nav-toggle span:nth-child(3) { top: 8px; }
}