/**
 * LH 设计系统 - Components
 * 所有 UI 组件的样式定义
 */

/* === 布局 === */
.lh-container{max-width:var(--lh-container);margin:0 auto;padding:0 var(--lh-gutter)}
.lh-container--wide{max-width:var(--lh-container-wide)}
.lh-row{display:flex;flex-wrap:wrap;margin:0 calc(var(--lh-gutter)/-2)}
.lh-row>[class*="lh-col"]{padding:0 calc(var(--lh-gutter)/2)}
.lh-col-1{width:8.333%}.lh-col-2{width:16.667%}.lh-col-3{width:25%}.lh-col-4{width:33.333%}
.lh-col-5{width:41.667%}.lh-col-6{width:50%}.lh-col-7{width:58.333%}.lh-col-8{width:66.667%}
.lh-col-9{width:75%}.lh-col-10{width:83.333%}.lh-col-11{width:91.667%}.lh-col-12{width:100%}
@media(max-width:768px){.lh-row>[class*="lh-col"]{width:100%}}

/* === 按钮 === */
.lh-btn{
  display:inline-flex;align-items:center;justify-content:center;gap:var(--lh-sp-2);
  padding:var(--lh-sp-2) var(--lh-sp-5);height:40px;
  font-size:var(--lh-fs-base);font-weight:var(--lh-fw-medium);line-height:1;
  border:1px solid transparent;border-radius:var(--lh-r-sm);
  background:var(--lh-primary);color:var(--lh-text-inv);
  transition:all var(--lh-dur) var(--lh-ease);cursor:pointer;white-space:nowrap;
  box-shadow:var(--lh-sh-1);position:relative;overflow:hidden;
}
.lh-btn:hover{background:var(--lh-primary-hover);box-shadow:var(--lh-sh-2);transform:translateY(-1px)}
.lh-btn:active{transform:translateY(0);box-shadow:var(--lh-sh-1)}
.lh-btn:disabled,.lh-btn.is-disabled{opacity:.5;cursor:not-allowed;pointer-events:none}
.lh-btn--ghost{background:transparent;color:var(--lh-primary);border-color:var(--lh-border-strong);box-shadow:none}
.lh-btn--ghost:hover{background:var(--lh-primary-soft);border-color:var(--lh-primary)}
.lh-btn--soft{background:var(--lh-primary-soft);color:var(--lh-primary);box-shadow:none}
.lh-btn--soft:hover{background:var(--lh-primary);color:var(--lh-text-inv)}
.lh-btn--outline{background:transparent;color:var(--lh-primary);border-color:var(--lh-primary);box-shadow:none}
.lh-btn--outline:hover{background:var(--lh-primary);color:var(--lh-text-inv)}
.lh-btn--danger{background:var(--lh-danger);color:#fff}
.lh-btn--danger:hover{background:#dc2626}
.lh-btn--vip{background:var(--lh-vip);color:#fff;border:none}
.lh-btn--vip:hover{filter:brightness(1.1)}
.lh-btn--sm{height:32px;padding:var(--lh-sp-1) var(--lh-sp-3);font-size:var(--lh-fs-sm)}
.lh-btn--lg{height:48px;padding:var(--lh-sp-3) var(--lh-sp-6);font-size:var(--lh-fs-md)}
.lh-btn--block{width:100%}
.lh-btn--icon{width:40px;padding:0}
.lh-btn--icon.lh-btn--sm{width:32px}
.lh-btn--icon.lh-btn--lg{width:48px}
.lh-btn.is-loading{pointer-events:none;color:transparent}
.lh-btn.is-loading::after{
  content:'';position:absolute;width:18px;height:18px;
  border:2px solid rgba(255,255,255,.3);border-top-color:#fff;
  border-radius:50%;animation:lh-spin .6s linear infinite;
}
.lh-btn--ghost.is-loading::after,.lh-btn--soft.is-loading::after,.lh-btn--outline.is-loading::after{
  border-color:rgba(255,63,159,.2);border-top-color:var(--lh-primary);
}
@keyframes lh-spin{to{transform:rotate(360deg)}}

/* === 卡片 === */
.lh-card{
  background:var(--lh-surface-solid);border:1px solid var(--lh-border);
  border-radius:var(--lh-r-md);padding:var(--lh-sp-5);
  box-shadow:var(--lh-sh-1);transition:all var(--lh-dur) var(--lh-ease);
}
.lh-card:hover{box-shadow:var(--lh-sh-2);transform:translateY(-3px)}
.lh-card__header{display:flex;align-items:center;justify-content:space-between;margin-bottom:var(--lh-sp-4)}
.lh-card__title{font-size:var(--lh-fs-lg);font-weight:var(--lh-fw-semibold);color:var(--lh-text)}
.lh-card__body{color:var(--lh-text-soft)}
.lh-card__footer{margin-top:var(--lh-sp-4);padding-top:var(--lh-sp-4);border-top:1px solid var(--lh-border)}

/* === 玻璃卡片 === */
.lh-glass{
  background:var(--lh-surface);backdrop-filter:var(--lh-glass-blur);
  -webkit-backdrop-filter:var(--lh-glass-blur);
  border:1px solid var(--lh-border);border-radius:var(--lh-r-md);
  box-shadow:var(--lh-sh-1),var(--lh-sh-inset);
}

/* === 面板 === */
.lh-panel{
  background:var(--lh-bg-elevated);border:1px solid var(--lh-border);
  border-radius:var(--lh-r-lg);padding:var(--lh-sp-6);box-shadow:var(--lh-sh-2);
}

/* === 徽章 === */
.lh-badge{
  display:inline-flex;align-items:center;padding:var(--lh-sp-1) var(--lh-sp-2);
  font-size:var(--lh-fs-xs);font-weight:var(--lh-fw-medium);
  border-radius:var(--lh-r-full);line-height:1;
  background:var(--lh-primary-soft);color:var(--lh-primary);
}
.lh-badge--success{background:var(--lh-success-soft);color:var(--lh-success)}
.lh-badge--warning{background:var(--lh-warning-soft);color:var(--lh-warning)}
.lh-badge--danger{background:var(--lh-danger-soft);color:var(--lh-danger)}
.lh-badge--info{background:var(--lh-info-soft);color:var(--lh-info)}

/* === 标签 === */
.lh-tag{
  display:inline-flex;align-items:center;padding:var(--lh-sp-1) var(--lh-sp-3);
  font-size:var(--lh-fs-sm);border-radius:var(--lh-r-xs);
  background:var(--lh-bg-soft);color:var(--lh-text-soft);border:1px solid var(--lh-border);
}

/* === 表单 === */
.lh-field{margin-bottom:var(--lh-sp-4)}
.lh-label{display:block;font-size:var(--lh-fs-sm);font-weight:var(--lh-fw-medium);color:var(--lh-text);margin-bottom:var(--lh-sp-2)}
.lh-input,.lh-textarea,.lh-select{
  width:100%;padding:var(--lh-sp-2) var(--lh-sp-3);height:40px;
  background:var(--lh-surface-solid);color:var(--lh-text);
  border:1px solid var(--lh-border-strong);border-radius:var(--lh-r-sm);
  font-size:var(--lh-fs-base);transition:all var(--lh-dur) var(--lh-ease);
  outline:none;
}
.lh-input:focus,.lh-textarea:focus,.lh-select:focus{
  border-color:var(--lh-primary);box-shadow:0 0 0 3px var(--lh-primary-soft);
}
.lh-input::placeholder,.lh-textarea::placeholder{color:var(--lh-text-mute)}
.lh-textarea{height:auto;min-height:100px;resize:vertical}
.lh-select{appearance:none;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%2394a3b8' stroke-width='2'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E");background-repeat:no-repeat;background-position:right 12px center;padding-right:36px}
.lh-switch{
  position:relative;display:inline-block;width:44px;height:24px;
}
.lh-switch input{opacity:0;width:0;height:0}
.lh-switch .lh-switch__slider{
  position:absolute;inset:0;cursor:pointer;
  background:var(--lh-border-strong);border-radius:var(--lh-r-full);
  transition:var(--lh-dur) var(--lh-ease);
}
.lh-switch .lh-switch__slider::before{
  content:'';position:absolute;left:2px;top:2px;width:20px;height:20px;
  background:#fff;border-radius:50%;transition:var(--lh-dur) var(--lh-ease);
  box-shadow:var(--lh-sh-1);
}
.lh-switch input:checked+.lh-switch__slider{background:var(--lh-primary)}
.lh-switch input:checked+.lh-switch__slider::before{transform:translateX(20px)}
.lh-checkbox{
  display:inline-flex;align-items:center;gap:var(--lh-sp-2);cursor:pointer;
  font-size:var(--lh-fs-base);color:var(--lh-text);
}
.lh-checkbox input[type="checkbox"]{
  width:18px;height:18px;accent-color:var(--lh-primary);cursor:pointer;
}

/* === 模态框 === */
.lh-modal{
  position:fixed;inset:0;z-index:var(--lh-z-modal);
  display:none;align-items:center;justify-content:center;
  background:rgba(0,0,0,.45);backdrop-filter:blur(4px);
  animation:lh-fade-in var(--lh-dur) var(--lh-ease);
}
.lh-modal.is-active{display:flex}
.lh-modal__content{
  background:var(--lh-surface-solid);border-radius:var(--lh-r-lg);
  box-shadow:var(--lh-sh-3);padding:var(--lh-sp-6);width:90%;max-width:520px;
  max-height:85vh;overflow-y:auto;
  animation:lh-slide-up var(--lh-dur) var(--lh-ease-out);
}
.lh-modal__header{display:flex;align-items:center;justify-content:space-between;margin-bottom:var(--lh-sp-4)}
.lh-modal__title{font-size:var(--lh-fs-lg);font-weight:var(--lh-fw-semibold)}
.lh-modal__close{width:32px;height:32px;display:flex;align-items:center;justify-content:center;border-radius:var(--lh-r-sm);color:var(--lh-text-mute);transition:all var(--lh-dur-fast)}
.lh-modal__close:hover{background:var(--lh-bg-soft);color:var(--lh-text)}
.lh-modal__footer{margin-top:var(--lh-sp-5);display:flex;justify-content:flex-end;gap:var(--lh-sp-3)}
@keyframes lh-fade-in{from{opacity:0}to{opacity:1}}
@keyframes lh-slide-up{from{opacity:0;transform:translateY(20px) scale(.96)}to{opacity:1;transform:translateY(0) scale(1)}}

/* === 吐司 === */
.lh-toast-container{
  position:fixed;top:var(--lh-sp-5);right:var(--lh-sp-5);z-index:var(--lh-z-toast);
  display:flex;flex-direction:column;gap:var(--lh-sp-3);pointer-events:none;
}
.lh-toast{
  pointer-events:auto;
  display:flex;align-items:center;gap:var(--lh-sp-3);
  padding:var(--lh-sp-3) var(--lh-sp-4);
  background:var(--lh-surface-solid);border:1px solid var(--lh-border);
  border-radius:var(--lh-r-sm);box-shadow:var(--lh-sh-2);
  font-size:var(--lh-fs-sm);color:var(--lh-text);
  animation:lh-toast-in var(--lh-dur) var(--lh-ease-out);
  min-width:280px;max-width:420px;
}
.lh-toast.is-leaving{animation:lh-toast-out var(--lh-dur-fast) var(--lh-ease) forwards}
.lh-toast--success{border-left:3px solid var(--lh-success)}
.lh-toast--error{border-left:3px solid var(--lh-danger)}
.lh-toast--warning{border-left:3px solid var(--lh-warning)}
.lh-toast--info{border-left:3px solid var(--lh-info)}
@keyframes lh-toast-in{from{opacity:0;transform:translateX(40px)}to{opacity:1;transform:translateX(0)}}
@keyframes lh-toast-out{to{opacity:0;transform:translateX(40px)}}

/* === 下拉菜单 === */
.lh-dropdown{position:relative;display:inline-block}
.lh-dropdown__menu{
  position:absolute;top:100%;right:0;margin-top:var(--lh-sp-2);
  min-width:180px;padding:var(--lh-sp-2);
  background:var(--lh-surface-solid);border:1px solid var(--lh-border);
  border-radius:var(--lh-r-sm);box-shadow:var(--lh-sh-2);
  display:none;z-index:200;
  animation:lh-fade-in var(--lh-dur-fast) var(--lh-ease);
}
.lh-dropdown.is-active .lh-dropdown__menu{display:block}
.lh-dropdown__item{
  display:flex;align-items:center;gap:var(--lh-sp-2);
  padding:var(--lh-sp-2) var(--lh-sp-3);border-radius:var(--lh-r-xs);
  font-size:var(--lh-fs-sm);color:var(--lh-text-soft);cursor:pointer;
  transition:all var(--lh-dur-fast);
}
.lh-dropdown__item:hover{background:var(--lh-bg-soft);color:var(--lh-text)}
.lh-dropdown__divider{height:1px;background:var(--lh-border);margin:var(--lh-sp-2) 0}

/* === 选项卡 === */
.lh-tabs{display:flex;gap:0;border-bottom:2px solid var(--lh-border)}
.lh-tabs__item{
  padding:var(--lh-sp-3) var(--lh-sp-4);font-size:var(--lh-fs-base);
  font-weight:var(--lh-fw-medium);color:var(--lh-text-mute);
  border-bottom:2px solid transparent;margin-bottom:-2px;cursor:pointer;
  transition:all var(--lh-dur) var(--lh-ease);
}
.lh-tabs__item:hover{color:var(--lh-text-soft)}
.lh-tabs__item.is-active{color:var(--lh-primary);border-bottom-color:var(--lh-primary)}
.lh-tabs__panel{display:none;padding:var(--lh-sp-5) 0}
.lh-tabs__panel.is-active{display:block}

/* === 分页 === */
.lh-pagination{display:flex;align-items:center;justify-content:center;gap:var(--lh-sp-2);padding:var(--lh-sp-4) 0}
.lh-pagination__item{
  display:flex;align-items:center;justify-content:center;
  min-width:36px;height:36px;padding:0 var(--lh-sp-2);
  border:1px solid var(--lh-border);border-radius:var(--lh-r-sm);
  font-size:var(--lh-fs-sm);color:var(--lh-text-soft);cursor:pointer;
  transition:all var(--lh-dur-fast);
}
.lh-pagination__item:hover{border-color:var(--lh-primary);color:var(--lh-primary)}
.lh-pagination__item.is-active{background:var(--lh-primary);color:#fff;border-color:var(--lh-primary)}
.lh-pagination__item.is-disabled{opacity:.4;cursor:not-allowed}

/* === 头像 === */
.lh-avatar{
  display:inline-flex;align-items:center;justify-content:center;
  width:40px;height:40px;border-radius:50%;overflow:hidden;
  background:var(--lh-gradient-soft);color:var(--lh-primary);
  font-weight:var(--lh-fw-semibold);font-size:var(--lh-fs-md);
  flex-shrink:0;
}
.lh-avatar img{width:100%;height:100%;object-fit:cover}
.lh-avatar--sm{width:32px;height:32px;font-size:var(--lh-fs-sm)}
.lh-avatar--lg{width:56px;height:56px;font-size:var(--lh-fs-xl)}

/* === 表格 === */
.lh-table{width:100%;border-collapse:separate;border-spacing:0}
.lh-table th{
  padding:var(--lh-sp-3) var(--lh-sp-4);font-size:var(--lh-fs-sm);
  font-weight:var(--lh-fw-medium);color:var(--lh-text-mute);text-align:left;
  border-bottom:1px solid var(--lh-border);background:var(--lh-bg-soft);
}
.lh-table td{
  padding:var(--lh-sp-3) var(--lh-sp-4);font-size:var(--lh-fs-base);
  color:var(--lh-text-soft);border-bottom:1px solid var(--lh-border);
  vertical-align:middle;
}
.lh-table tbody tr{transition:background var(--lh-dur-fast)}
.lh-table tbody tr:hover{background:var(--lh-bg-soft)}
.lh-table--striped tbody tr:nth-child(even){background:var(--lh-bg-soft)}
.lh-table-wrap{overflow-x:auto;border:1px solid var(--lh-border);border-radius:var(--lh-r-sm)}

/* === 警告框 === */
.lh-alert{
  display:flex;align-items:flex-start;gap:var(--lh-sp-3);
  padding:var(--lh-sp-3) var(--lh-sp-4);border-radius:var(--lh-r-sm);
  font-size:var(--lh-fs-sm);margin-bottom:var(--lh-sp-4);
  background:var(--lh-info-soft);color:var(--lh-info);border:1px solid rgba(59,130,246,.2);
}
.lh-alert--success{background:var(--lh-success-soft);color:var(--lh-success);border-color:rgba(34,197,94,.2)}
.lh-alert--warning{background:var(--lh-warning-soft);color:var(--lh-warning);border-color:rgba(245,158,11,.2)}
.lh-alert--danger{background:var(--lh-danger-soft);color:var(--lh-danger);border-color:rgba(239,68,68,.2)}

/* === 空状态 === */
.lh-empty{
  display:flex;flex-direction:column;align-items:center;justify-content:center;
  padding:var(--lh-sp-8) var(--lh-sp-4);color:var(--lh-text-mute);text-align:center;
}
.lh-empty__icon{font-size:48px;margin-bottom:var(--lh-sp-4);opacity:.4}
.lh-empty__text{font-size:var(--lh-fs-md);margin-bottom:var(--lh-sp-3)}
.lh-empty__desc{font-size:var(--lh-fs-sm);max-width:360px}

/* === 骨架屏 === */
.lh-skeleton{
  background:linear-gradient(90deg,var(--lh-bg-soft) 25%,var(--lh-bg-elevated) 50%,var(--lh-bg-soft) 75%);
  background-size:200% 100%;animation:lh-shimmer 1.5s infinite;
  border-radius:var(--lh-r-xs);
}
.lh-skeleton--text{height:14px;margin-bottom:var(--lh-sp-2);border-radius:var(--lh-r-xs)}
.lh-skeleton--title{height:24px;width:60%;margin-bottom:var(--lh-sp-3)}
.lh-skeleton--avatar{width:40px;height:40px;border-radius:50%}
.lh-skeleton--card{height:200px;border-radius:var(--lh-r-md)}
@keyframes lh-shimmer{0%{background-position:200% 0}100%{background-position:-200% 0}}

/* === 进度条 === */
.lh-progress{
  height:8px;background:var(--lh-bg-soft);border-radius:var(--lh-r-full);overflow:hidden;
}
.lh-progress__bar{
  height:100%;background:var(--lh-gradient);border-radius:var(--lh-r-full);
  transition:width var(--lh-dur-slow) var(--lh-ease-out);
}

/* === 后台统计卡 === */
.lh-stat-card{
  background:var(--lh-surface-solid);border:1px solid var(--lh-border);
  border-radius:var(--lh-r-md);padding:var(--lh-sp-5);
  display:flex;align-items:center;gap:var(--lh-sp-4);
  transition:all var(--lh-dur) var(--lh-ease);
}
.lh-stat-card:hover{box-shadow:var(--lh-sh-2);transform:translateY(-2px)}
.lh-stat-card__icon{
  width:48px;height:48px;border-radius:var(--lh-r-sm);
  display:flex;align-items:center;justify-content:center;
  background:var(--lh-primary-soft);color:var(--lh-primary);flex-shrink:0;
}
.lh-stat-card__icon--success{background:var(--lh-success-soft);color:var(--lh-success)}
.lh-stat-card__icon--warning{background:var(--lh-warning-soft);color:var(--lh-warning)}
.lh-stat-card__icon--danger{background:var(--lh-danger-soft);color:var(--lh-danger)}
.lh-stat-card__icon--info{background:var(--lh-info-soft);color:var(--lh-info)}
.lh-stat-card__body{flex:1;min-width:0}
.lh-stat-card__label{font-size:var(--lh-fs-sm);color:var(--lh-text-mute);margin-bottom:var(--lh-sp-1)}
.lh-stat-card__value{font-size:var(--lh-fs-2xl);font-weight:var(--lh-fw-bold);color:var(--lh-text)}
.lh-stat-card__trend{font-size:var(--lh-fs-xs);color:var(--lh-success);margin-top:var(--lh-sp-1)}

/* === 后台侧边导航 === */
.lh-sidebar-nav{width:var(--lh-sidebar-w);padding:var(--lh-sp-3)}
.lh-sidebar-nav__group{margin-bottom:var(--lh-sp-4)}
.lh-sidebar-nav__title{
  font-size:var(--lh-fs-xs);font-weight:var(--lh-fw-semibold);
  color:var(--lh-text-mute);text-transform:uppercase;letter-spacing:.5px;
  padding:var(--lh-sp-2) var(--lh-sp-3);margin-bottom:var(--lh-sp-1);
}
.lh-sidebar-nav__item{
  display:flex;align-items:center;gap:var(--lh-sp-3);
  padding:var(--lh-sp-2) var(--lh-sp-3);border-radius:var(--lh-r-sm);
  font-size:var(--lh-fs-base);color:var(--lh-text-soft);
  transition:all var(--lh-dur-fast);cursor:pointer;margin-bottom:2px;
}
.lh-sidebar-nav__item:hover{background:var(--lh-bg-soft);color:var(--lh-text)}
.lh-sidebar-nav__item.is-active{background:var(--lh-primary-soft);color:var(--lh-primary);font-weight:var(--lh-fw-medium)}
.lh-sidebar-nav__item svg{width:20px;height:20px;flex-shrink:0;opacity:.7}
.lh-sidebar-nav__item.is-active svg{opacity:1}
.lh-sidebar-nav__badge{
  margin-left:auto;font-size:var(--lh-fs-xs);
  background:var(--lh-danger);color:#fff;
  padding:1px 6px;border-radius:var(--lh-r-full);min-width:20px;text-align:center;
}