/* ===================================================================
   catbl.online — Front UI (index, submit, detail)
   =================================================================== */

:root{
  --bg:#f9fdff;
  --bg2:#b2d2ff;
  --card:#ffffff;
  --text:#0f172a;
  --muted:#6b7280;
  --border:#e5e7eb;

  --brand:#2563eb;
  --brand-600:#2563eb;
  --brand-700:#1d4ed8;
  --ok:#10b981;

  --tint:#eef5ff;
  --radius:14px;
  --shadow:0 10px 24px rgba(2,6,23,.08);

  /* 卡片统一高度 */
  --card-height: 224px;
}

*{box-sizing:border-box}
html,body{height:100%}
body{
  margin:0;
  font-family:system-ui,-apple-system,Segoe UI,Roboto,Helvetica,Arial,"PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  color:var(--text);
  background:
    radial-gradient(1200px 600px at 50% -10%, rgba(178,210,255,.22), transparent 60%),
    linear-gradient(180deg, var(--bg), #ffffff);
  padding-bottom:130px;
}

a, .btn, .contact-item, .chip, .filter-chip, .icon-btn, .ask-big { text-decoration:none }

/* ================== Header ================== */
.header-bar{
  position:sticky; top:0; z-index:20;
  display:flex; align-items:center; justify-content:center; gap:12px;
  padding:22px 16px;
  background: linear-gradient(180deg, #d5e5ff 0%, #f6faff 100%);
  border-bottom:1px solid var(--border);
}
.site-title{margin:0;font-size:22px;font-weight:900;letter-spacing:.2px}

/* 头像固定在右侧 */
.avatar-card{
  position:absolute; right:16px; top:50%; transform:translateY(-50%);
  width:56px;height:56px;border-radius:50%;
  border:2px solid rgba(37,99,235,.2);
  box-shadow:0 4px 12px rgba(37,99,235,.18);
  overflow:visible;
  z-index:100;
}
.avatar-img{width:100%;height:100%;object-fit:cover;display:block;border-radius:50%}

/* 屏幕中心提示框 */
#avatar-tip{
  position:fixed; left:50%; top:50%; transform:translate(-50%, -50%) scale(.98);
  z-index:2000;
  display:none;
  max-width:min(86vw, 520px);
  background:#fff; color:#0f172a; border:1px solid var(--border); border-radius:12px;
  box-shadow:var(--shadow);
  padding:16px 18px;
  font-size:19px; line-height:1.75;
  font-weight:600;
  opacity:0; transition:.18s ease;
}
#avatar-tip.show{ display:block; opacity:1; transform:translate(-50%, -50%) scale(1); }
#avatar-tip .sign{
  display:block; margin-top:10px; text-align:right; padding-right:8px; opacity:.95; font-weight:700;
}

/* ================== Container ================== */
.container{max-width:1200px;margin:18px auto;padding:0 16px 130px}

/* ================== Buttons / Inputs ================== */
.input,.textarea,select{
  width:100%;background:#fff;color:var(--text);border:1px solid var(--border);border-radius:12px;padding:10px 12px;outline:none;
}
.input:focus,.textarea:focus,select:focus{border-color:var(--brand-600);box-shadow:0 0 0 3px rgba(37,99,235,.12)}
.textarea{min-height:120px;resize:vertical}

.btn{
  appearance:none;border:1px solid var(--border);border-radius:12px;background:#fff;color:var(--text);
  height:40px;padding:0 14px;font-weight:700;cursor:pointer;display:inline-flex;align-items:center;justify-content:center;
  transition: transform .12s ease, border-color .18s ease, box-shadow .18s ease, background .18s ease;
}
.btn:hover{transform:scale(1.03);border-color:#cbd5e1}
.btn:active{transform:translateY(.5px)}
.btn:disabled{opacity:.6;cursor:not-allowed}
.btn.primary{
  color:#fff;border-color:transparent;
  background: linear-gradient(135deg, #3f6fe8 0%, #2563eb 100%);
  box-shadow:0 6px 16px rgba(37,99,235,.25);
}
.btn.ghost{background:#fff;color:var(--text)}
.btn-taglike{
  appearance:none;border:1px solid transparent;color:#fff;
  background: linear-gradient(135deg, #4a77ee 0%, #2563eb 100%);
  border-radius:999px;font-weight:800;height:42px;padding:0 22px;letter-spacing:.4px;
}
.btn-taglike:hover{transform:scale(1.03)}
.btn.wide{ display:flex; width:100%; align-items:center; justify-content:center; }
.same-font{ font-size:18px; font-weight:800; letter-spacing:.2px; }

/* “我要提问”按钮 */
.ask-row{ display:flex; justify-content:center; margin:8px 0 12px; }
.ask-big{ height:44px; padding:0 240px; border-radius:999px; font-weight:800; }

/* ================== Search & Clear ================== */
.search-row{display:flex;gap:10px;margin:10px 0; align-items:center;}
#search-btn{min-width:100px}
.btn-clear{width:36px;height:36px;border-radius:12px;border:1px solid var(--border);background:#fff;display:grid;place-items:center;padding:0}
.btn-clear svg{width:12px;height:12px}

/* ================== Category Chips ================== */
.category-row{display:flex; align-items:center; gap:10px; flex-wrap:wrap; margin:10px 0;}
.category-label{font-weight:800}
.category-buttons{display:flex;align-items:center;gap:8px;flex-wrap:wrap}
.category-buttons .chip,.filter-chip{
  appearance:none;border:1px solid rgba(37,99,235,.18);
  background: linear-gradient(180deg, #f3f8ff 0%, #eaf2ff 100%);
  color:var(--text);
  font-size:13px;line-height:1;font-weight:700;padding:6px 12px;border-radius:999px;display:inline-flex;align-items:center;justify-content:center;cursor:pointer;user-select:none;
  transition: transform .12s ease, border-color .18s ease, box-shadow .18s ease, background .18s ease;
}
.category-buttons .chip:hover,.filter-chip:hover{transform:scale(1.03);border-color:var(--brand-600)}
.category-buttons .chip.active,.filter-chip.active{background:linear-gradient(135deg, #4a77ee, #2563eb);border-color:transparent;color:#fff}

/* ================== List Grid ================== */
#question-list{list-style:none;margin:14px 0 0;padding:0;display:grid;gap:14px}
@media (max-width:640px){#question-list{grid-template-columns:1fr}}
@media (min-width:641px) and (max-width:960px){#question-list{grid-template-columns:repeat(2,1fr)}}
@media (min-width:961px) and (max-width:1280px){#question-list{grid-template-columns:repeat(3,1fr)}}
@media (min-width:1281px){#question-list{grid-template-columns:repeat(4,1fr)}}

.question-item{
  cursor:pointer;
  background: linear-gradient(180deg, var(--bg) 0%, var(--tint) 100%);
  border:1px solid var(--border);border-radius:var(--radius);
  box-shadow:var(--shadow);
  padding:14px;
  display:flex;flex-direction:column;gap:8px;

  /* 固定高度，统一视觉 */
  height: var(--card-height);
  overflow:hidden;
}
.question-item:focus{outline:none;box-shadow:0 0 0 3px rgba(37,99,235,.15)}
.qi-title{
  font-size:16px;font-weight:900;line-height:1.3;margin:0;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.qi-desc{
  color:var(--muted);font-size:14px;margin:2px 0 0;line-height:1.6;
  display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden;
}
.qi-meta{margin-top:auto;display:flex;flex-wrap:wrap;gap:8px;align-items:center;color:#111827;font-weight:700}
.qi-meta .tag{display:inline-flex;align-items:center;padding:2px 8px;border:1px solid var(--border);border-radius:999px;background:#fff;color:#0f1115;font-size:12px;line-height:1}

#question-list .empty-state,#question-list .loading{
  grid-column:1/-1;justify-self:stretch;background:#fff;border:1px solid var(--border);border-radius:var(--radius);
  min-height:120px;display:flex;align-items:center;justify-content:center;color:var(--muted);font-weight:700
}

/* ================== Pager + PerPage（下拉放在 #pager 内） ================== */
#pager{
  margin:16px 0 6px;
  display:grid;
  grid-template-columns: 1fr auto; /* 左侧居中翻页，右侧“每页选择” */
  align-items:center;
  gap:12px;
}
.pager-core{
  display:flex;
  justify-content:center;  /* 确保上一页/当前/下一页始终居中 */
  align-items:center;
  gap:12px;
}
#pager button{min-width:92px}

.pager-perpage{
  display:flex;
  align-items:center;
  gap:6px;
  color:#334155;
  font-weight:700;
  white-space:nowrap;
}
.pager-perpage select{
  height:32px;
  padding:0 8px;
  border-radius:10px;
  border:1px solid var(--border);
  background:#fff;
}

/* ================== Submit page（共用样式，保留） ================== */
.form-group{margin:12px 0}
.form-group label{display:block;font-weight:800;margin-bottom:8px}
.version-inline{ display:flex; align-items:center; gap:10px; }
.version-inline .version-label{ font-weight:800; }

/* Dropzone 固定高度（不被缩略图撑开） */
.dropzone{
  position:relative;
  border:2px dashed var(--border);border-radius:12px;background:#fff;cursor:pointer;
  padding:12px;
  height:160px;
  overflow:hidden;
}
.dropzone .dz-instructions{padding:8px;text-align:center;color:var(--muted)}
.dropzone .dz-meta{ text-align:center; margin-top:2px; color:#8b95a1; }
.dropzone.has-images .dz-instructions,
.dropzone.has-images .dz-meta{ display:none; }

/* 预览网格：绝对定位在容器内部，从左上角开始排布，可滚动 */
.preview-grid{
  position:absolute; top:12px; left:12px; right:12px; bottom:12px;
  overflow:auto;
  display:grid; grid-auto-rows:76px; grid-template-columns:repeat(auto-fill,76px); gap:8px;
}
.preview-grid .thumb{
  position:relative;width:76px;height:76px;border-radius:10px;overflow:hidden;background:#f3f4f6;flex:none;
}
.preview-grid .thumb img{width:100%;height:100%;object-fit:cover;display:block}
.preview-grid .thumb .del{
  position:absolute;top:4px;right:4px;width:22px;height:22px;border-radius:50%;
  display:flex;align-items:center;justify-content:center;font-weight:900;line-height:1;
  background:rgba(0,0,0,.55);color:#fff;border:0;cursor:pointer;transition: transform .12s ease, opacity .18s ease;
}
.preview-grid .thumb .del:hover{ transform: scale(1.06); }

/* 选择后的 chips（含版本） */
.selected-tags{margin-top:6px;display:flex;flex-wrap:wrap;gap:6px}
.selected-tags .tag{background:rgba(37,99,235,.08);color:var(--brand-700);border:1px solid var(--brand);padding:2px 8px;border-radius:999px;font-weight:700;font-size:12px}

.submit-row{ margin:18px 0 28px; display:flex; justify-content:center; align-items:center; gap:12px; }
.btn-x2{ padding-left:132px; padding-right:132px; }

/* ================== Modal（居中显示） ================== */
.modal-overlay{
  position:fixed;inset:0;background:rgba(15,17,26,.45);
  display:none; align-items:center; justify-content:center;
}
.modal{
  width:min(720px,92vw);background:#fff;border:1px solid var(--border);border-radius:16px;box-shadow:var(--shadow);
  margin:0 auto; overflow:hidden;
}
.modal-header{display:flex;align-items:center;justify-content:space-between;gap:10px;padding:12px 14px;background:#eff6ff;border-bottom:1px solid var(--border)}
.modal-body{padding:12px}
.modal-actions{padding:10px 12px;display:flex;gap:10px;justify-content:flex-end;border-top:1px solid var(--border)}
.modal-close{appearance:none;background:#fff;border:1px solid var(--border);color:#111;width:32px;height:32px;border-radius:10px;cursor:pointer}
.version-list{display:flex;flex-wrap:wrap;gap:8px}
.version-list .chip{appearance:none;border:1px solid var(--border);border-radius:999px;background:#fff;padding:6px 12px;font-weight:800;cursor:pointer}
.version-list .chip:hover{border-color:var(--brand-600)}
.version-list .chip.active{background:var(--brand);border-color:var(--brand);color:#fff}

/* Info modal */
#info-modal .modal{width:min(640px,92vw)}
#info-modal .modal-header{background:#fff}
#info-modal .modal-body p{margin:8px 0;color:var(--text)}
#info-modal .modal-actions .btn.primary{min-width:92px}

/* ================== Detail 两列等高（供 question_detail 使用） ================== */
.detail-grid{ display:grid; grid-template-columns: 1fr 1fr; gap:16px; align-items:stretch; }
@media (max-width: 980px){ .detail-grid{ grid-template-columns: 1fr; } }
.panel{
  background: linear-gradient(180deg, #ffffff 0%, var(--tint) 100%);
  border:1px solid var(--border); border-radius:var(--radius); padding:14px; box-shadow:var(--shadow);
}
.panel.panel-fill{ height:100%; display:flex; flex-direction:column; }
.detail-actions{ margin-top:auto; }
.detail-actions .btn{ height:44px; }

/* detail content */
.q-detail h1{ font-size:22px; margin:0 0 8px; }
.q-meta{ display:flex; flex-wrap:wrap; gap:8px; color:#111827; font-weight:700; margin:6px 0 10px; }
.q-meta .tag{ display:inline-flex; align-items:center; padding:2px 8px; border:1px solid var(--border);
  border-radius:999px; background:#fff; color:#0f1115; font-size:12px; line-height:1; }
.q-desc, .q-solution, .q-images{ margin:10px 0; }
.img-grid{ display:grid; grid-template-columns:repeat(auto-fill,minmax(110px,1fr)); gap:10px; }
.img-grid img{ width:100%; aspect-ratio:1/1; object-fit:cover; border-radius:10px; cursor:pointer; }

/* Lightbox */
.lightbox-backdrop{position:fixed;inset:0;background:rgba(0,0,0,.7);display:none;z-index:60}
.lightbox{position:fixed;inset:10vh 5vw;background:#000;display:none;z-index:61}
.lightbox img{width:100%;height:100%;object-fit:contain}

/* ================== 固定贴底：联系方式 + 社交图标 ================== */
#contact{
  position:fixed; left:0; right:0; bottom:0; z-index:50;
  background: linear-gradient(180deg, #ffffff 0%, #f3f7ff 100%); border-top:1px solid var(--border);
  min-height:60px;
}
.contact-row{display:flex;flex-wrap:wrap;justify-content:center;gap:10px;padding:12px 16px}
.contact-item{
  appearance:none;border:1px solid var(--border);border-radius:12px;background:#fff;color:var(--text);
  height:36px;padding:0 14px;font-weight:700;cursor:pointer;text-decoration:none;display:inline-flex;align-items:center;justify-content:center;
  transition: transform .12s ease, border-color .18s ease, box-shadow .18s ease;
}
.contact-item:hover{border-color:#cbd5e1; transform:scale(1.03);}

/* 社交图标条：固定在底栏左侧（不影响中间按钮布局） */
#contact{ position:fixed }
.footer-social{
  position:absolute; left:16px; top:50%; transform:translateY(-50%);
  display:flex; align-items:center; gap:8px;
}
.footer-social .social-icon{
  width:22px; height:22px; object-fit:contain; display:block;
  filter: drop-shadow(0 1px 1px rgba(0,0,0,.08));
}
.footer-social .social-text{
  color:#0f172a; font-weight:800; font-size: 10px; white-space:nowrap;
}

/* 头像触发“呼吸闪烁” */
@keyframes breathe {
  0%,100% { transform: scale(1); box-shadow: 0 0 0 0 rgba(37,99,235,0); }
  50%     { transform: scale(1.05); box-shadow: 0 0 0 8px rgba(37,99,235,.15); }
}
.contact-item.pulse3 { animation: breathe 0.5s ease-in-out 3; }