* { box-sizing: border-box; }
html, body { margin:0; padding:0; font-family: "PingFang SC","Microsoft YaHei","Comic Sans MS",sans-serif; color:#333; }
body {
  background: linear-gradient(180deg,#bde7ff 0%,#e9fff1 60%,#fff7c2 100%);
  min-height: 100vh;
  position: relative; overflow-x: hidden;
}

/* 背景装饰 */
.bg-deco { position: fixed; inset: 0; pointer-events: none; z-index:0; }
.cloud { position: absolute; font-size: 60px; opacity:.85; animation: float 8s ease-in-out infinite; }
.cloud.c1 { top:8%; left:8%; }
.cloud.c2 { top:18%; right:10%; animation-delay: -3s; font-size:80px; }
.sun { position: absolute; top:5%; right:5%; font-size:80px; animation: spin 20s linear infinite; }
@keyframes float { 0%,100%{ transform:translateY(0);} 50%{ transform:translateY(-15px);} }
@keyframes spin { to { transform: rotate(360deg);} }

/* 个性化背景：指定用户进入首页展示专属图片背景（由 index.html 按用户名挂载） */
body.custom-bg {
  background:
    linear-gradient(180deg, rgba(255,255,255,.66) 0%, rgba(255,255,255,.5) 55%, rgba(255,255,255,.4) 100%),
    var(--user-bg) center/cover no-repeat fixed;
}
body.custom-bg .bg-deco { display: none; }

.hero { text-align:center; padding: 50px 20px 20px; position: relative; z-index:1;}
.hero h1 { font-size: 42px; margin: 0; color:#ff6b9d; text-shadow: 2px 2px 0 #fff; }
.hero .sub { font-size: 18px; color: #555; }

.cards { display:flex; flex-wrap:wrap; gap:30px; justify-content:center; padding: 40px 20px; position:relative; z-index:1;}
.card {
  background: rgba(255,255,255,.9); border-radius: 24px; width: 280px;
  padding: 30px; text-align:center; text-decoration:none; color:#333;
  box-shadow: 0 10px 30px rgba(0,0,0,0.08);
  transition: transform .25s ease, box-shadow .25s ease;
  border: 4px solid transparent;
}
.card:hover { transform: translateY(-6px) rotate(-1deg); box-shadow: 0 20px 40px rgba(0,0,0,0.15); }
.card.user { border-color:#ffb6c1; }
.card.admin { border-color:#9be3a4; }
.card .emoji { font-size: 64px; }
.card h2 { margin:10px 0 6px; }
footer { text-align:center; padding:20px; color:#888; position:relative; z-index:1;}

/* 通用按钮 */
.btn {
  display:inline-block; padding:10px 20px; border-radius:30px; border:none;
  background: linear-gradient(135deg,#ffb86c,#ff7eb9);
  color:#fff; font-size:16px; cursor:pointer; box-shadow: 0 6px 14px rgba(255,126,185,.4);
  transition: transform .1s; text-decoration:none;
}
.btn:hover { transform: translateY(-2px); }
.btn.green { background: linear-gradient(135deg,#67d987,#3bb6e0);}
.btn.gray { background: #ccc; box-shadow:none; }
.btn.red  { background: linear-gradient(135deg,#ff6b6b,#e63946); color:#fff; }

/* quiz 页 */
.quiz-wrap { max-width:800px; margin: 30px auto; padding: 0 16px 60px; position:relative; z-index:1;}
.quiz-wrap .panel:last-of-type { margin-bottom: 0; }
.toolbar { display:flex; gap:10px; flex-wrap:wrap; align-items:center; background:#fff; padding:14px; border-radius:16px;
  box-shadow:0 8px 20px rgba(0,0,0,.08); margin-bottom:16px;}
.toolbar select, .toolbar input { padding:8px 12px; border:2px solid #cce; border-radius:10px; font-size:15px; }
.q-card {
  background:#fff; padding:20px 22px; border-radius:18px; margin-bottom:16px;
  box-shadow: 0 8px 18px rgba(0,0,0,0.06);
  border-left: 8px solid #ffb86c;
  position:relative;
}
.q-card.style-cat_fish { border-left-color:#ff8aa8; background: linear-gradient(180deg,#fff7fa,#fff);}
.q-card.style-frog_lotus { border-left-color:#67d987; background: linear-gradient(180deg,#f1ffe9,#fff);}
.q-card .qno { display:inline-block; background:#ff6b9d; color:#fff; border-radius:50%;
  width:28px; height:28px; line-height:28px; text-align:center; margin-right:8px; font-weight:bold;}
.q-stem { font-size:17px; line-height:1.7; }
.q-passage { background:#fffbe6; border-left:4px solid #f6c84a; padding:10px 14px; border-radius:8px; margin:8px 0; white-space: pre-wrap;}
.options label { display:block; padding:6px 10px; margin:4px 0; border-radius:8px; cursor:pointer;}
.options label:hover { background:#f3f7ff; }
.fillin { padding:6px 10px; border:2px solid #ddd; border-radius:8px; margin:0 4px; min-width:80px;}
.fillin:focus { border-color:#ff8aa8; outline:none; }

/* 连线题 */
.match-wrap { display:flex; gap:30px; align-items:flex-start; }
.match-col { flex:1; display:flex; flex-direction:column; gap:8px;}
.match-item { padding:10px 14px; background:#f3f7ff; border-radius:10px; cursor:pointer; border:2px solid transparent;}
.match-item.selected { border-color:#ff6b9d; background:#fff0f6;}
.match-item.matched { background:#d6f5d6; border-color:#67d987; cursor:default;}
.match-svg { position:absolute; pointer-events:none; left:0; top:0;}

/* 结果页 */
.result-card { background:#fff; padding:30px; border-radius:24px; text-align:center;
  box-shadow:0 10px 30px rgba(0,0,0,0.1); }
.score-big { font-size:80px; font-weight:bold; color:#ff6b9d; }
.pass { color:#34b14a; }
.fail { color:#888; }

/* 管理页 */
.admin-wrap { max-width:1100px; margin:30px auto; padding:0 16px; position:relative; z-index:1;}
.admin-grid { display:grid; grid-template-columns: 320px 1fr; gap:16px;}
.panel { background:#fff; padding:18px; border-radius:16px; box-shadow:0 8px 18px rgba(0,0,0,.06); }
.q-row { padding:8px; border-bottom:1px dashed #eee; display:flex; justify-content:space-between; align-items:flex-start; gap:6px;}
.q-row .meta { font-size:12px; color:#888; }
.q-row pre { white-space: pre-wrap; word-break: break-all; margin:4px 0; font-size:13px;}
textarea { width:100%; border-radius:10px; border:2px solid #ddd; padding:10px; font-family: monospace;}
input[type=text], input[type=number] { padding:8px 10px; border:2px solid #ddd; border-radius:8px;}
.tag { display:inline-block; padding:2px 8px; background:#eef; border-radius:6px; font-size:12px; margin-right:6px;}

@media (max-width: 800px) {
  .admin-grid { grid-template-columns: 1fr;}
  .hero h1 { font-size:30px;}
}

/* ============= 全局动态自适应 ============= */
/* 防止内容超出视口产生横向滚动条 */
html, body { overflow-x: hidden; }
img, video { max-width: 100%; height: auto; }
table { max-width: 100%; }
pre { max-width: 100%; overflow-x: auto; word-break: break-word; white-space: pre-wrap; }
input, textarea, select, button { max-width: 100%; box-sizing: border-box; }

/* 卡片网格自适应：用 auto-fill + minmax 替代死板的列数 */
.cards {
  display: grid !important;
  grid-template-columns: repeat(auto-fill, minmax(min(260px, 100%), 1fr)) !important;
  gap: 16px;
}

/* Pad 档（≤960px）：题库 toolbar 换行更自然 */
@media (max-width: 960px) {
  .toolbar { gap: 6px !important; }
  .toolbar > * { margin-bottom: 4px; }
  .quiz-wrap, .admin-wrap, .ai-wrap { padding-left: 10px !important; padding-right: 10px !important; }
}

/* 手机档（≤640px）：进一步压缩 */
@media (max-width: 640px) {
  body { font-size: 14px; }
  .hero { padding: 20px 12px !important; }
  .hero h1 { font-size: 24px !important; }
  .hero .sub { font-size: 13px !important; }

  .card { padding: 16px !important; }
  .card .emoji { font-size: 36px !important; }
  .card h2 { font-size: 17px !important; }

  .tabs { overflow-x: auto; flex-wrap: nowrap !important; -webkit-overflow-scrolling: touch; }
  .tabs .tab { white-space: nowrap; flex: none !important; }

  .panel { padding: 12px !important; }
  .q-row { flex-wrap: wrap !important; }
  .q-row .img-thumb { max-width: 100% !important; height: auto !important; }
  .grade-form { flex-wrap: wrap; }
  .grade-form input { flex: 1 1 100px !important; min-width: 100px !important; }

  /* AI 助手页：双栏改为竖排 */
  .ai-wrap { grid-template-columns: 1fr !important; }
  .ai-side { max-height: 30vh !important; order: 2; }
  .ai-main { height: 70vh !important; }

  /* 视频网格：240px 改为 200px */
  .video-grid { grid-template-columns: repeat(auto-fill, minmax(170px, 1fr)) !important; gap: 10px !important; }

  /* 顶栏：用户名 + 积分胶囊换行 */
  #topbar > div > div:first-child { flex-wrap: wrap !important; }

  /* 模态层：宽度铺满 */
  .preview-modal, .player-box { width: 96vw !important; }
  .player-box video { max-height: 50vh !important; }
}

/* 超窄（≤380px，老款手机）：再压一档 */
@media (max-width: 380px) {
  .login-wrap { margin: 30px auto !important; }
  .login-box { padding: 20px !important; }
  .ai-input .btn, .ai-input .mic-btn, .ai-input .img-btn { padding: 8px 10px !important; font-size: 14px !important; }
  .quick-row { padding: 6px 8px !important; }
  .quick-row .chip { font-size: 11px !important; padding: 3px 8px !important; }
}

/* ========== 小狗追骨头加载动画 ========== */
.dog-loader {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 32px 20px;
}
.dog-loader .dl-track {
  width: 140px;
  height: 140px;
  border-radius: 50%;
  border: 3px dashed rgba(142,197,252,.6);
  position: relative;
  margin: 0 auto;
  animation: dl-spin 2s linear infinite;
}
.dog-loader .dl-dog-container {
  position: absolute;
  top: -18px;
  left: 50%;
  margin-left: -24px;
}
.dog-loader .dl-dog {
  position: relative;
  width: 48px;
  height: 32px;
}
.dog-loader .dl-dog-body {
  width: 36px;
  height: 19px;
  background: #f3c68f;
  border-radius: 10px;
  position: absolute;
  top: 8px;
  left: 4px;
  z-index: 2;
}
.dog-loader .dl-dog-head {
  width: 22px;
  height: 22px;
  background: #f3c68f;
  border-radius: 50%;
  position: absolute;
  right: -4px;
  top: 2px;
  z-index: 3;
}
.dog-loader .dl-dog-ear {
  width: 8px;
  height: 14px;
  background: #d9a05b;
  border-radius: 4px;
  position: absolute;
  top: 3px;
  left: 3px;
  transform-origin: top center;
  animation: dl-ear 0.25s infinite alternate;
}
.dog-loader .dl-dog-eye {
  width: 4px;
  height: 4px;
  background: #333;
  border-radius: 50%;
  position: absolute;
  top: 6px;
  right: 5px;
}
.dog-loader .dl-dog-nose {
  width: 5px;
  height: 5px;
  background: #333;
  border-radius: 50%;
  position: absolute;
  top: 11px;
  right: -1px;
}
.dog-loader .dl-leg {
  width: 6px;
  height: 13px;
  background: #f3c68f;
  border-radius: 3px;
  position: absolute;
  top: 16px;
  transform-origin: top center;
  z-index: 1;
}
.dog-loader .dl-leg1 { left: 6px;  animation: dl-run 0.2s infinite alternate; }
.dog-loader .dl-leg2 { left: 14px; animation: dl-run 0.2s infinite alternate-reverse; background:#d9a05b; z-index:3; }
.dog-loader .dl-leg3 { right:14px; animation: dl-run 0.2s infinite alternate; }
.dog-loader .dl-leg4 { right: 6px; animation: dl-run 0.2s infinite alternate-reverse; background:#d9a05b; z-index:3; }
.dog-loader .dl-dog-tail {
  width: 13px;
  height: 6px;
  background: #f3c68f;
  border-radius: 3px;
  position: absolute;
  left: -6px;
  top: 10px;
  transform-origin: right center;
  animation: dl-tail 0.15s infinite alternate;
  z-index: 2;
}
.dog-loader .dl-bone-container {
  position: absolute;
  top: 50%;
  right: -11px;
  margin-top: -3px;
  transform: rotate(90deg);
  animation: dl-bone 0.4s infinite alternate;
}
.dog-loader .dl-bone {
  position: relative;
  width: 20px;
  height: 6px;
  background: #fff;
  border-radius: 3px;
  box-shadow: 0 2px 4px rgba(0,0,0,.12);
}
.dog-loader .dl-bone::before,
.dog-loader .dl-bone::after {
  content: '';
  position: absolute;
  width: 10px;
  height: 10px;
  background: #fff;
  border-radius: 50%;
}
.dog-loader .dl-bone::before { left:-3px; top:-4px; box-shadow:0 7px 0 #fff; }
.dog-loader .dl-bone::after  { right:-3px; top:-4px; box-shadow:0 7px 0 #fff; }
.dog-loader .dl-text {
  margin-top: 28px;
  font-size: 13px;
  color: #888;
  font-weight: bold;
  letter-spacing: 1px;
}
.dog-loader .dl-text::after {
  content: '';
  animation: dl-dots 1.5s steps(4,end) infinite;
}
@keyframes dl-spin { 100% { transform: rotate(360deg); } }
@keyframes dl-run  { 0%{transform:rotate(-45deg)} 100%{transform:rotate(45deg)} }
@keyframes dl-ear  { 0%{transform:rotate(-15deg)} 100%{transform:rotate(20deg)} }
@keyframes dl-tail { 0%{transform:rotate(-30deg)} 100%{transform:rotate(30deg)} }
@keyframes dl-bone { 0%{transform:rotate(90deg) translateX(-3px)} 100%{transform:rotate(90deg) translateX(3px)} }
@keyframes dl-dots { 0%{content:''} 25%{content:'.'} 50%{content:'..'} 75%{content:'...'} 100%{content:''} }

/* ============= 首页模块卡片 (tiles) ============= */
.tiles {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(min(220px, 100%), 1fr));
  gap: 22px;
  padding: 30px 24px 40px;
  max-width: 1100px;
  margin: 0 auto;
  position: relative;
  z-index: 1;
}

.tile {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 22px 16px 18px;
  border-radius: 22px;
  text-decoration: none;
  color: #333;
  background: rgba(255,255,255,.92);
  box-shadow: 0 8px 24px rgba(0,0,0,.08);
  border: 3px solid transparent;
  transition: transform .25s ease, box-shadow .25s ease, border-color .25s ease;
  animation: tile-in .42s ease both;
  animation-delay: var(--tile-delay, 0s);
}
@keyframes tile-in {
  from { opacity: 0; transform: translateY(12px) scale(.97); }
  to   { opacity: 1; transform: translateY(0)    scale(1); }
}

/* 彩色渐变底（基于 --tile-color），铺满卡片顶部、往下淡出，不溢出容器 */
.tile-bg {
  position: absolute;
  inset: 0;
  border-radius: inherit;
  background:
    radial-gradient(ellipse at 50% 0%, rgba(255,255,255,.9) 0%, rgba(255,255,255,0) 55%),
    linear-gradient(180deg, var(--tile-color, #5B9BD5) 0%, rgba(255,255,255,0) 78%);
  opacity: .42;
  transition: opacity .35s ease;
}
.tile:hover {
  transform: translateY(-6px) rotate(-.6deg);
  border-color: var(--tile-color, #5B9BD5);
  box-shadow: 0 16px 36px rgba(0,0,0,.14);
}
.tile:hover .tile-bg { opacity: .6; }
.tile.tile--admin { --tile-color:#51CF66; }

/* 图标容器：固定尺寸，确保 SVG 不会撑大 */
.tile-icon {
  position: relative;
  z-index: 1;
  width: 92px;
  height: 92px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: linear-gradient(135deg, rgba(255,255,255,.95), rgba(255,255,255,.78));
  box-shadow: 0 6px 16px rgba(0,0,0,.1);
  margin-bottom: 12px;
  flex-shrink: 0;
}
.tile-icon svg {
  width: 64px;
  height: 64px;
  display: block;
  filter: drop-shadow(0 5px 8px rgba(0,0,0,.16));
}

.tile-name {
  position: relative; z-index: 1;
  font-size: 17px;
  font-weight: bold;
  color: #2E2A26;
  margin-bottom: 4px;
}
.tile-desc {
  position: relative; z-index: 1;
  font-size: 12px;
  color: #6E6E6E;
  text-align: center;
  line-height: 1.5;
}

/* ============ tiles 响应式 ============ */
@media (max-width: 640px) {
  .tiles {
    gap: 14px;
    padding: 18px 14px 28px;
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .tile { padding: 16px 10px 14px; border-radius: 18px; }
  .tile-icon { width: 68px; height: 68px; margin-bottom: 8px; }
  .tile-icon svg { width: 48px; height: 48px; }
  .tile-name { font-size: 14px; }
  .tile-desc { font-size: 11px; }
}
@media (max-width: 380px) {
  .tile-icon { width: 58px; height: 58px; }
  .tile-icon svg { width: 40px; height: 40px; }
  .tile-name { font-size: 13px; }
}

/* ===== 积分项目可搜索选择器 / 规则管理弹窗（管理端） ===== */
.rp-box{border:1px solid #e0e8f5;border-radius:10px;padding:8px;background:#fafcff}
.rp-toolbar{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:6px}
.rp-search{flex:1;min-width:180px;padding:7px 10px;border:2px solid #d0e4f5;border-radius:8px;font-size:13px;box-sizing:border-box}
.rp-search:focus{outline:none;border-color:#5b8def}
.rp-filter{display:inline-flex;border:1px solid #d0e4f5;border-radius:8px;overflow:hidden}
.rp-filter button{border:0;background:#fff;padding:6px 12px;font-size:12px;cursor:pointer;color:#555}
.rp-filter button.on{background:#5b8def;color:#fff}
.rp-panel{max-height:168px;overflow-y:auto;border:1px solid #e8eef7;border-radius:8px;background:#fff;padding:8px}
.rp-cat{font-size:12px;font-weight:bold;color:#8a97ab;margin:6px 0 4px}
.rp-cat:first-child{margin-top:0}
.rp-chips{display:flex;flex-wrap:wrap;gap:6px}
.rp-chip{border:1px solid #dfe6f0;background:#f7f9fc;color:#44506a;border-radius:14px;padding:4px 11px;font-size:12.5px;cursor:pointer;transition:all .12s;line-height:1.4}
.rp-chip:hover{border-color:#5b8def;background:#eef4ff}
.rp-chip.neg{border-color:#f5c6c0;background:#fff3f2;color:#a22323}
.rp-chip.neg:hover{background:#ffe3e0;border-color:#e57373}
.rp-chip.pos{border-color:#b7e4c7;background:#f0fff4;color:#1f7a3a}
.rp-chip.pos:hover{background:#ddfbe6;border-color:#4caf50}
.rp-chip.sel{outline:2px solid #5b8def;outline-offset:1px;font-weight:bold;box-shadow:0 2px 8px rgba(91,141,239,.35)}
.rp-chip.recent::after{content:"🕘";margin-left:5px;font-size:11px}
.rp-empty{color:#aaa;font-size:12.5px;padding:8px 2px}
.rp-action{display:flex;align-items:center;gap:10px;flex-wrap:wrap;margin-top:8px}
.rp-selected{font-size:12.5px;color:#555;flex:1;min-width:160px}
.rp-selected b{color:#2856a8}
.rp-clear{margin-left:6px;cursor:pointer;border:0;background:none;color:#c0392b;font-size:12px;padding:0}
.rp-delta{font-size:12px;color:#666;white-space:nowrap}
.rp-delta input{width:72px;padding:6px 8px;border:2px solid #ddd;border-radius:8px;font-size:13px;margin-left:4px}
.rp-status{font-size:11px;color:#666}
.rm-quick{border:1px solid #d0e4f5;background:#f7f9fc;color:#2856a8;border-radius:8px;padding:4px 12px;font-size:12.5px;cursor:pointer;transition:all .12s}
.rm-quick:hover{background:#e8f0ff;border-color:#5b8def}
.rm-del{border:0;background:none;color:#c0392b;cursor:pointer;font-size:13px;padding:2px 6px;border-radius:6px}
.rm-del:hover{background:#fdecea}
.rm-edit{border:0;background:none;color:#2856a8;cursor:pointer;font-size:13px;padding:2px 6px;border-radius:6px}
.rm-edit:hover{background:#e8f0ff}