/* ============================================================
   小林妈妈AI科普 — 全站搜索 + AI名词弹窗 + 名词库 样式
   依赖: ai-search.js
   ============================================================ */

/* ---- 顶部搜索框 ---- */
.xa-search{position:relative;flex-shrink:0;width:230px}
.xa-search-box{display:flex;align-items:center;gap:8px;background:var(--xa-neutral-50);border:1.5px solid var(--xa-border);border-radius:12px;padding:0 12px;height:42px;transition:border-color .15s,box-shadow .15s}
.xa-search-box:focus-within{border-color:var(--xa-primary);box-shadow:0 0 0 3px var(--xa-primary-100);background:var(--xa-card)}
.xa-search-icon{color:var(--xa-muted-foreground);flex-shrink:0}
.xa-search-input{flex:1;min-width:0;border:none;outline:none;background:transparent;font-size:15px;font-family:inherit;color:var(--xa-foreground)}
.xa-search-input::placeholder{color:var(--xa-neutral-400)}
.xa-search-clear{display:none;align-items:center;justify-content:center;width:20px;height:20px;border:none;border-radius:9999px;background:var(--xa-neutral-200);color:var(--xa-muted-foreground);cursor:pointer;flex-shrink:0;padding:0}
.xa-search-clear:hover{background:var(--xa-neutral-300)}

/* ---- 搜索下拉面板 ---- */
.xa-search-panel{position:absolute;top:calc(100% + 8px);left:0;right:0;z-index:60;background:var(--xa-card);border:1px solid var(--xa-border);border-radius:14px;box-shadow:0 16px 40px -12px rgba(0,0,0,.18);overflow:hidden;max-height:420px;overflow-y:auto}
.xg-group{padding:10px 16px 6px;font-size:12px;font-weight:700;color:var(--xa-primary-600);letter-spacing:.06em;background:var(--xa-neutral-50);border-bottom:1px solid var(--xa-border)}
.xg-item{display:flex;align-items:center;gap:12px;padding:12px 16px;width:100%;text-align:left;background:var(--xa-card);border:none;border-bottom:1px solid var(--xa-neutral-100);cursor:pointer;text-decoration:none;color:inherit;font-family:inherit}
.xg-item:hover{background:var(--xa-primary-50)}
.xg-item-emoji{font-size:22px;flex-shrink:0;width:30px;text-align:center}
.xg-item-main{flex:1;min-width:0;display:flex;flex-direction:column}
.xg-item-title{font-size:15px;font-weight:700;color:var(--xa-foreground)}
.xg-item-desc{font-size:12px;color:var(--xa-muted-foreground);white-space:nowrap;overflow:hidden;text-overflow:ellipsis;line-height:1.4}
.xg-item-go{color:var(--xa-primary);font-size:16px;flex-shrink:0}
.xg-empty{padding:28px 16px;text-align:center;color:var(--xa-muted-foreground);font-size:15px}

/* ---- 名词解释弹窗 ---- */
.xg-overlay{position:fixed;inset:0;background:rgba(20,15,40,.55);backdrop-filter:blur(4px);-webkit-backdrop-filter:blur(4px);display:flex;align-items:center;justify-content:center;z-index:9999;opacity:0;visibility:hidden;transition:opacity .25s,visibility .25s;padding:20px}
.xg-overlay.xg-show{opacity:1;visibility:visible}
.xg-modal{background:var(--xa-card);border-radius:20px;max-width:520px;width:100%;max-height:90vh;overflow:hidden;display:flex;flex-direction:column;box-shadow:0 24px 60px -12px rgba(0,0,0,.35);transform:translateY(16px) scale(.97);transition:transform .25s cubic-bezier(.2,.8,.2,1)}
.xg-overlay.xg-show .xg-modal{transform:translateY(0) scale(1)}
.xg-head{display:flex;align-items:center;gap:12px;padding:20px 22px 14px;position:relative}
.xg-emoji{font-size:40px;line-height:1;flex-shrink:0}
.xg-title-wrap{flex:1;min-width:0}
.xg-title{font-size:24px;font-weight:800;color:var(--xa-foreground);line-height:1.2}
.xg-en{font-size:13px;color:var(--xa-muted-foreground);margin-top:2px}
.xg-cat{flex-shrink:0;padding:4px 12px;border-radius:9999px;background:var(--xa-primary-50);color:var(--xa-primary-700);font-size:12px;font-weight:700}
.xg-close{width:34px;height:34px;border-radius:9999px;border:none;background:var(--xa-neutral-100);color:var(--xa-muted-foreground);font-size:15px;cursor:pointer;display:flex;align-items:center;justify-content:center;flex-shrink:0;transition:all .15s;position:absolute;top:14px;right:14px}
.xg-close:hover{background:var(--xa-primary-100);color:var(--xa-primary);transform:rotate(90deg)}
.xg-body{padding:6px 22px 18px;overflow-y:auto;flex:1}
.xg-sec{margin-top:14px}
.xg-sec-label{font-size:13px;font-weight:800;color:var(--xa-primary-600);margin-bottom:6px;display:flex;align-items:center;gap:4px}
.xg-sec p{margin:0;font-size:16px;line-height:1.8;color:var(--xa-foreground)}
.xg-sec-def{background:var(--xa-primary-50);border-radius:12px;padding:14px 16px}
.xg-sec-story{background:linear-gradient(135deg,#fef9c3,#fde68a);border-radius:12px;padding:14px 16px}
.xg-sec-story .xg-sec-label{color:#b45309}
/* ---- 小测验 ---- */
.xg-sec-quiz{background:linear-gradient(135deg,#e0f2fe,#bae6fd);border-radius:12px;padding:14px 16px}
.xg-sec-quiz .xg-sec-label{color:#0369a1}
.xg-quiz-q{font-size:15px;line-height:1.7;color:var(--xa-foreground);margin:0 0 10px !important;font-weight:600}
.xg-quiz-btn{padding:8px 16px;border-radius:9999px;border:none;background:var(--xa-primary);color:#fff;font-size:14px;font-weight:700;cursor:pointer;transition:all .15s;font-family:inherit}
.xg-quiz-btn:hover{transform:translateY(-1px);box-shadow:0 4px 12px rgba(37,99,235,.3)}
.xg-quiz-a{margin:10px 0 0 !important;padding:10px 14px;background:rgba(255,255,255,.7);border-radius:10px;border:1px dashed #0284c7;font-size:15px;line-height:1.7;color:var(--xa-foreground)}
/* ---- 动手试一试 ---- */
.xg-sec-tools{background:linear-gradient(135deg,#f3e8ff,#e9d5ff);border-radius:12px;padding:14px 16px}
.xg-sec-tools .xg-sec-label{color:#6d28d9}
.xg-tools{display:flex;flex-direction:column;gap:10px}
.xg-tool{background:#fff;border:1px solid var(--xa-border);border-radius:12px;padding:12px 14px}
.xg-tool-head{display:flex;align-items:center;justify-content:space-between;gap:8px;margin-bottom:8px}
.xg-tool-tag{padding:3px 10px;border-radius:9999px;background:#ede9fe;color:#6d28d9;font-size:12px;font-weight:800}
.xg-tool-copy{flex-shrink:0;padding:5px 12px;border-radius:9999px;border:1.5px solid var(--xa-primary-200);background:var(--xa-card);color:var(--xa-primary-700);font-size:12px;font-weight:700;cursor:pointer;transition:all .15s;font-family:inherit}
.xg-tool-copy:hover{background:var(--xa-primary-50);border-color:var(--xa-primary)}
.xg-tool-p{margin:0;font-size:14px;line-height:1.7;color:var(--xa-foreground);background:var(--xa-neutral-50);border-radius:8px;padding:10px 12px;border-left:3px solid #a78bfa}
.xg-rel-wrap{margin-top:16px}
.xg-rel-label{font-size:13px;font-weight:800;color:var(--xa-muted-foreground);margin-bottom:8px}
.xg-rel{display:flex;flex-wrap:wrap;gap:8px}
.xg-chip{padding:6px 12px;border-radius:9999px;border:1.5px solid var(--xa-primary-200);background:var(--xa-card);color:var(--xa-primary-700);font-size:13px;font-weight:600;cursor:pointer;transition:all .15s;font-family:inherit}
.xg-chip:hover{background:var(--xa-primary-50);border-color:var(--xa-primary);transform:translateY(-1px)}
.xg-foot{padding:14px 22px 20px;border-top:1px solid var(--xa-border);display:flex;align-items:center;gap:10px;background:var(--xa-neutral-50)}
.xg-next{flex:1;display:flex;align-items:center;justify-content:center;gap:6px;padding:13px 18px;border-radius:12px;border:none;background:linear-gradient(90deg,var(--xa-primary),var(--xa-primary-400));color:#fff;font-size:16px;font-weight:700;cursor:pointer;transition:transform .15s,box-shadow .15s;font-family:inherit}
.xg-next:hover{transform:translateY(-2px);box-shadow:0 6px 16px -4px rgba(37,99,235,.5)}
.xg-next-label{font-weight:600;font-size:14px;opacity:.9}
.xg-next-name{font-weight:800}
.xg-next-hidden{display:none}
.xg-again{flex-shrink:0;padding:13px 16px;border-radius:12px;border:1.5px solid var(--xa-border);background:var(--xa-card);color:var(--xa-foreground);font-size:15px;font-weight:600;cursor:pointer;transition:all .15s;font-family:inherit}
.xg-again:hover{background:var(--xa-neutral-100)}

/* ---- AI名词知识库页面 ---- */
.xg-filter{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:28px}
.xg-flt{padding:9px 18px;border-radius:9999px;border:1.5px solid var(--xa-border);background:var(--xa-card);color:var(--xa-muted-foreground);font-size:15px;font-weight:600;cursor:pointer;transition:all .15s;font-family:inherit}
.xg-flt:hover{border-color:var(--xa-primary);color:var(--xa-primary)}
.xg-flt.active{background:var(--xa-primary);border-color:var(--xa-primary);color:#fff}
.xg-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(250px,1fr));gap:16px}
.xg-card{display:flex;flex-direction:column;align-items:flex-start;text-align:left;padding:20px;border-radius:16px;border:1px solid var(--xa-border);background:var(--xa-card);cursor:pointer;transition:all .2s;font-family:inherit;position:relative;overflow:hidden}
.xg-card:hover{transform:translateY(-4px);box-shadow:0 12px 28px -12px rgba(37,99,235,.25);border-color:var(--xa-primary-200)}
.xg-card-emoji{font-size:34px;line-height:1;margin-bottom:10px}
.xg-card-name{font-size:19px;font-weight:800;color:var(--xa-foreground)}
.xg-card-en{font-size:12px;color:var(--xa-muted-foreground);margin-top:2px}
.xg-card-cat{margin-top:10px;padding:3px 10px;border-radius:9999px;background:var(--xa-primary-50);color:var(--xa-primary-700);font-size:12px;font-weight:700}
.xg-card-def{margin-top:10px;font-size:14px;line-height:1.7;color:var(--xa-muted-foreground);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.xg-card-go{margin-top:14px;font-size:13px;font-weight:600;color:var(--xa-primary)}
.xg-card-go b{font-size:15px}

/* ---- 响应式 ---- */
@media(max-width:768px){
  .xa-search{width:auto;flex:1;max-width:200px}
  .xg-modal{max-width:100%}
  .xg-head{padding:16px 16px 12px}
  .xg-body{padding:4px 16px 14px}
  .xg-foot{padding:12px 16px 16px}
  .xg-emoji{font-size:32px}
  .xg-title{font-size:20px}
  .xg-grid{grid-template-columns:repeat(auto-fill,minmax(150px,1fr))}
}
@media(max-width:420px){
  .xa-search{display:none}
}