/* =========================================================
   儿童在线学习平台 · 设计系统（简约 · 学生风 · 响应式）
   适配：PC（≥960px 侧边栏/顶栏） + 手机端（底部 Tab）
   ========================================================= */

:root {
  --brand: #5B8DEF;
  --brand-dark: #3F6FD8;
  --brand-soft: #EEF3FF;
  --bg: #F4F7FB;
  --card: #FFFFFF;
  --text: #2B3144;
  --text-2: #5A6378;
  --muted: #98A1B3;
  --line: #EDF1F7;
  --line-strong: #E1E7F0;

  --chinese: #FF7A85;   /* 语文 */
  --chinese-soft: #FFEEF0;
  --math: #5B8DEF;      /* 数学 */
  --math-soft: #EEF3FF;
  --english: #2BC4A0;   /* 英语 */
  --english-soft: #E7FBF5;

  --warn: #FFB020;
  --danger: #FF5C5C;
  --ok: #2BC4A0;

  --radius: 18px;
  --radius-sm: 12px;
  --shadow: 0 8px 24px rgba(46, 70, 130, .08);
  --shadow-sm: 0 3px 10px rgba(46, 70, 130, .06);
  --nav-h: 64px;
  --tab-h: 64px;
  --maxw: 1100px;
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  font-family: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
  font-size: 15px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
a { color: inherit; text-decoration: none; }
button { font-family: inherit; cursor: pointer; }
img { max-width: 100%; }

/* ---------- 布局容器 ---------- */
.app { min-height: 100vh; display: flex; flex-direction: column; }
.container {
  flex: 1;
  display: flex;
  flex-direction: column;
  width: 100%;
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 20px 18px 96px;   /* 底部留白给 Tab */
}

/* ---------- 顶栏（PC） ---------- */
.topbar {
  display: none;
  align-items: center;
  gap: 22px;
  padding: 0 26px;
  height: var(--nav-h);
  background: var(--card);
  border-bottom: 1px solid var(--line);
  position: sticky; top: 0; z-index: 30;
}
.topbar .logo { display: flex; align-items: center; gap: 10px; font-weight: 800; font-size: 18px; }
.topbar .logo .dot {
  width: 30px; height: 30px; border-radius: 9px;
  background: linear-gradient(135deg, var(--brand), #7AA5FF);
  display: grid; place-items: center; color: #fff; font-size: 16px;
}
.topbar nav { display: flex; gap: 6px; margin-left: 8px; max-width: 100%; overflow-x: auto; scrollbar-width: none; -ms-overflow-style: none; }
.topbar nav::-webkit-scrollbar { display: none; }
.topbar nav a {
  padding: 9px 14px; border-radius: 10px; color: var(--text-2); font-weight: 600; font-size: 14px;
}
.topbar nav a:hover { background: var(--bg); }
.topbar nav a.active { color: var(--brand); background: var(--brand-soft); }
.topbar .spacer { flex: 1; }
.topbar .me {
  display: flex; align-items: center; gap: 10px;
  padding: 6px 12px 6px 6px; border-radius: 999px; background: var(--bg);
}
.topbar .avatar {
  width: 34px; height: 34px; border-radius: 50%;
  background: linear-gradient(135deg, #FFD08A, #FF9F7A); color: #fff;
  display: grid; place-items: center; font-weight: 700;
}

/* ---------- 底部 Tab（手机端） ---------- */
.tabbar {
  position: fixed; left: 0; right: 0; bottom: 0; height: var(--tab-h);
  width: 100%; box-sizing: border-box;
  background: rgba(255,255,255,.96);
  backdrop-filter: saturate(180%) blur(10px);
  border-top: 1px solid var(--line);
  display: flex; z-index: 40;
  padding-bottom: env(safe-area-inset-bottom);
}
.tabbar a {
  flex: 1 1 0; min-width: 0; display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 3px;
  color: var(--muted); font-size: 11px; font-weight: 600;
  overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
}
.tabbar a.active { color: var(--brand); background: var(--brand-soft); }
.tabbar a .ic { font-size: 20px; line-height: 1; }
.tabbar a.active { color: var(--brand); }

/* ---------- 卡片 ---------- */
.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
  padding: 18px;
  margin-bottom: 16px;
}
.card > h3 { margin: 0 0 14px; font-size: 16px; display: flex; align-items: center; gap: 8px; }
.card .sub { color: var(--muted); font-size: 13px; font-weight: 500; }

/* ---------- 页面标题 ---------- */
.page-head { display: flex; align-items: center; justify-content: space-between; margin: 4px 2px 16px; }
.page-head h1 { font-size: 22px; margin: 0; }
.page-head .desc { color: var(--muted); font-size: 13px; margin-top: 4px; }
/* 页头右侧操作按钮组：显式 flex 布局，避免行内元素在各浏览器排版不一致 */
.head-actions { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; justify-content: flex-end; }
.head-actions .btn { white-space: nowrap; }

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 6px;
  border: none; border-radius: 12px; padding: 11px 18px; font-weight: 700; font-size: 14px;
  background: var(--brand); color: #fff; transition: .15s; box-shadow: 0 6px 14px rgba(91,141,239,.28);
}
.btn:hover { background: var(--brand-dark); }
.btn.block { width: 100%; }
.btn.ghost { background: var(--brand-soft); color: var(--brand); box-shadow: none; }
.btn.ghost:hover { background: #E2EBFF; }
.btn.soft { background: var(--bg); color: var(--text-2); box-shadow: none; }
.btn.soft:hover { background: var(--line); }
.btn:disabled { opacity: .5; cursor: not-allowed; box-shadow: none; }
.btn.sm { padding: 7px 12px; font-size: 13px; border-radius: 10px; }
.btn-primary, .btn.primary {
  width: 100%; padding: 14px; font-size: 16px; border-radius: 12px; font-weight: 700;
  background: linear-gradient(135deg, #4F7CFF, #6A5CFF); color: #fff; box-shadow: 0 8px 18px rgba(79,124,255,.35);
}
.btn-primary:hover, .btn.primary:hover { filter: brightness(1.05); background: linear-gradient(135deg, #4F7CFF, #6A5CFF); }
.btn-primary:active, .btn.primary:active { transform: translateY(1px); }
.btn-secondary {
  background: #fff; color: var(--brand); border: 1px solid var(--brand);
  padding: 12px 18px; border-radius: 12px; font-weight: 600; box-shadow: none;
}
.btn-secondary:hover { background: #F0F4FF; }
.actions { position: sticky; bottom: 0; background: var(--bg); padding: 10px 0; z-index: 5; border-top: 1px solid var(--line); }

/* ---------- 学科标签/彩色 ---------- */
.tag {
  display: inline-flex; align-items: center; gap: 5px;
  padding: 3px 10px; border-radius: 999px; font-size: 12px; font-weight: 700;
}
.tag.yw { background: var(--chinese-soft); color: var(--chinese); }
.tag.sx { background: var(--math-soft); color: var(--math); }
.tag.yy { background: var(--english-soft); color: var(--english); }
.tag.qt { background: var(--bg-2); color: var(--text-2); }
.tag.gray { background: var(--bg); color: var(--text-2); }
.tag.tag-fix { background: var(--brand-soft); color: var(--brand-dark); cursor: default; }

/* 多选标签组（自选科目） */
.chips { display: flex; flex-wrap: wrap; gap: 8px; }
.chk { display: inline-flex; align-items: center; gap: 6px; padding: 8px 12px; border: 1px solid var(--border); border-radius: 10px; font-size: 13px; cursor: pointer; background: #fff; user-select: none; }
.chk input { margin: 0; }
.chk.on { border-color: var(--brand); background: var(--brand-soft); color: var(--brand-dark); font-weight: 700; }

/* 弹窗 */
.modal { position: fixed; inset: 0; background: rgba(15,23,42,.45); display: flex; align-items: center; justify-content: center; z-index: 100; padding: 16px; }
.modal[style*="display:none"] { display: none !important; }
.modal-card { background: #fff; border-radius: 16px; padding: 20px; width: 100%; max-width: 420px; max-height: 90vh; overflow: auto; box-shadow: 0 24px 60px rgba(0,0,0,.25); }
.modal-card h3 { margin: 0 0 14px; display: flex; align-items: center; gap: 8px; }
.modal-actions { display: flex; gap: 10px; justify-content: flex-end; margin-top: 16px; }

/* ---------- 表单 ---------- */
.field { margin-bottom: 14px; }
.field label { display: block; font-size: 13px; font-weight: 600; color: var(--text-2); margin-bottom: 7px; }
.remember { display: flex; align-items: center; gap: 8px; font-size: 13px; color: var(--text-2); margin: -4px 0 16px; cursor: pointer; user-select: none; }
.remember input { width: auto; margin: 0; accent-color: var(--brand); }
.remember small { color: var(--muted); font-weight: 400; }
.input, .select, textarea.input {
  width: 100%; border: 1.5px solid var(--line-strong); border-radius: 12px;
  padding: 12px 14px; font-size: 15px; color: var(--text); background: #fff; outline: none; transition: .15s;
}
.input:focus, .select:focus, textarea.input:focus { border-color: var(--brand); box-shadow: 0 0 0 4px var(--brand-soft); }
textarea.input { resize: vertical; min-height: 110px; line-height: 1.6; }
.row2 { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }

/* ---------- 题目卡 ---------- */
.q {
  border: 1px solid var(--line); border-radius: var(--radius-sm);
  padding: 14px; margin-bottom: 12px; background: #fff;
}
.q .q-head { display: flex; align-items: center; justify-content: space-between; margin-bottom: 8px; }
.q .q-no { font-weight: 800; color: var(--text); }
.q .q-body { font-size: 15px; margin-bottom: 10px; }
.q .opts { display: grid; gap: 8px; }
.q .opt {
  display: flex; align-items: center; gap: 10px; padding: 10px 12px;
  border: 1.5px solid var(--line-strong); border-radius: 10px; cursor: pointer; transition: .12s;
}
.q .opt:hover { border-color: var(--brand); background: var(--brand-soft); }
.q .opt input { accent-color: var(--brand); width: 16px; height: 16px; }
.q .opt.correct { border-color: var(--ok); background: #E7FBF5; }
.q .opt.wrong { border-color: var(--danger); background: #FFEFEF; }
.q .q-fill input { width: 100%; border: none; border-bottom: 1.5px dashed var(--line-strong); padding: 8px 2px; font-size: 15px; outline: none; }
.q .q-fill input:focus { border-color: var(--brand); }
.q .answer-hint { margin-top: 8px; font-size: 13px; color: var(--ok); display: none; }
.q.revealed .answer-hint { display: block; }
/* 题目配图展示 */
.q-img-wrap { margin: 2px 0 10px; }
.q-img { max-width: 100%; max-height: 300px; border-radius: 12px; border: 1px solid var(--line-strong); display: block; cursor: zoom-in; background: #fff; box-shadow: var(--shadow-sm); }
.img-lightbox { position: fixed; inset: 0; background: rgba(15,23,42,.88); display: flex; align-items: center; justify-content: center; z-index: 9999; cursor: zoom-out; padding: 20px; }
.img-lightbox img { max-width: 92vw; max-height: 92vh; border-radius: 10px; box-shadow: 0 24px 60px rgba(0,0,0,.4); }

/* ---------- 题目有误反馈 ---------- */
.q { position: relative; }
.q-flag-btn { position: absolute; top: 10px; right: 10px; border: 1px solid var(--line-strong); background: #fff; color: #b45309; border-radius: 8px; padding: 3px 8px; font-size: 12px; cursor: pointer; line-height: 1.2; white-space: nowrap; }
.q-flag-btn:hover { background: #fffbeb; }
.q.flagged .opts label, .q.flagged .q-fill input { opacity: .45; pointer-events: none; }
.q.flagged .q-fill input { background: #f8fafc; }
.flag-note { margin-top: 8px; padding: 8px 10px; border-radius: 8px; background: #fff7ed; border: 1px solid #fed7aa; color: #9a3412; font-size: 13px; }
.flag-modal { position: fixed; inset: 0; background: rgba(15,23,42,.5); display: flex; align-items: center; justify-content: center; z-index: 9998; }
.flag-card { background: #fff; border-radius: 14px; padding: 20px; width: min(420px, 92vw); box-shadow: 0 24px 60px rgba(0,0,0,.25); }
.flag-title { font-size: 16px; font-weight: 700; margin-bottom: 8px; }
.flag-desc { font-size: 13px; color: #475569; line-height: 1.6; margin-bottom: 16px; }
.flag-actions { display: flex; gap: 10px; justify-content: flex-end; }
.flag-badge { display: inline-block; background: #fef2f2; color: #b91c1c; border: 1px solid #fecaca; border-radius: 6px; padding: 1px 6px; font-size: 12px; font-weight: 600; margin-right: 4px; }
.tag.warn { background: #fff7ed; color: #c2410c; border: 1px solid #fed7aa; }
.row-flagged { background: #fff7ed; }
.btn.danger { background: #dc2626; color: #fff; border-color: #dc2626; }
.btn.danger:hover { background: #b91c1c; }

/* ---------- 积分日历 ---------- */
.cal-nav { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; grid-column: 1 / -1; margin-bottom: 8px; }
.cal-nav button { border: 1px solid var(--brand); background: var(--brand); color: #fff; border-radius: 8px; padding: 5px 12px; font-size: 13px; font-weight: 700; cursor: pointer; }
.cal-nav button:disabled { opacity: .4; cursor: not-allowed; }
.cal-nav .cal-mtitle { font-size: 15px; font-weight: 800; color: var(--text); }
.cal-nav .cal-mtotal { margin-left: auto; font-size: 13px; font-weight: 700; color: var(--brand); }
.cal { display: grid; grid-template-columns: repeat(7, minmax(0, 1fr)); gap: 5px; width: 100%; box-sizing: border-box; }
.cal-title { grid-column: 1 / -1; font-size: 15px; font-weight: 800; color: var(--text); margin-bottom: 4px; }
.cal .wd { text-align: center; color: var(--muted); font-size: 12px; font-weight: 700; padding-bottom: 2px; }
.cal .day {
  min-width: 0; overflow: hidden; aspect-ratio: 1 / 1.3; border-radius: 10px; border: 1px solid var(--line);
  display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 3px;
  background: #fff; padding: 2px; box-sizing: border-box;
}
.cal .day .dnum { font-size: 12px; color: var(--text-2); font-weight: 700; line-height: 1; }
.cal .day.today { border-color: var(--brand); box-shadow: 0 0 0 3px var(--brand-soft); }
.cal .day.empty { border: none; background: transparent; }
.cal .pbtn {
  border: none; border-radius: 8px; background: var(--brand); color: #fff; max-width: 100%;
  font-size: 10px; font-weight: 800; padding: 3px 4px; line-height: 1.25; cursor: pointer;
  text-align: center; box-sizing: border-box;
}
.cal .pbtn.done { background: var(--bg); color: var(--muted); cursor: default; }
.cal .day.today .pbtn:not(.done) { box-shadow: 0 2px 8px rgba(91,141,239,.35); }

/* ---------- 积分汇总 ---------- */
.pts-breakdown { display: flex; flex-direction: column; gap: 8px; margin: 10px 0 4px; }
.pts-row { display: flex; align-items: center; justify-content: space-between; padding: 10px 14px; border-radius: 12px; background: var(--bg); }
.pts-row .pts-lbl { font-size: 14px; color: var(--text); font-weight: 600; }
.pts-row .pts-val { font-size: 16px; font-weight: 800; color: var(--brand); }
.pts-row.pts-total { background: var(--brand-soft); border: 1px solid var(--brand); }
.pts-row.pts-total .pts-lbl { color: var(--text); font-weight: 800; }
.pts-row.pts-total .pts-val { font-size: 20px; color: var(--brand-strong, #3b6fd4); }
.pts-note { font-size: 12px; color: var(--muted); margin-top: 8px; }
.pts-correct { font-size: 13px; color: var(--text-2); margin-top: 6px; }
.pts-correct b { color: var(--brand); }

/* ---------- 错题库列表 ---------- */
.filterbar { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 14px; position: relative; }
.filterbar .select { width: auto; flex: 1; min-width: 120px; }
.search { position: relative; flex: 2; min-width: 180px; }
.search input { width: 100%; padding-left: 38px; }
.search .si { position: absolute; left: 13px; top: 50%; transform: translateY(-50%); color: var(--muted); }
.wrong-item {
  border: 1px solid var(--line); border-radius: var(--radius-sm); padding: 14px; margin-bottom: 12px;
}
.wrong-item .wi-head { display: flex; align-items: center; justify-content: space-between; margin-bottom: 8px; cursor: pointer; }
.wrong-item .wi-q { font-size: 14px; margin-bottom: 8px; }
.wrong-item .wi-detail { background: var(--bg); border-radius: 10px; padding: 10px 12px; font-size: 13px; display: none; }
.wrong-item.open .wi-detail { display: block; }
.wrong-item .line-ok { color: var(--ok); }
.wrong-item .line-bad { color: var(--danger); }
.chip-x { font-size: 12px; color: var(--muted); }

/* ---------- 雷达图区 ---------- */
.radar-wrap { display: grid; gap: 16px; }
.radar-box { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 14px; }
.subj-btns { display: flex; flex-wrap: wrap; gap: 8px; margin: 4px 0 2px; }
.subj-btn { border: 1px solid var(--line); background: #fff; color: var(--text-2); padding: 7px 14px; border-radius: 999px; font-size: 13px; font-weight: 700; cursor: pointer; transition: all .15s; }
.subj-btn:hover { border-color: #5B8DEF; color: #2563eb; }
.subj-btn.active { background: #5B8DEF; border-color: #5B8DEF; color: #fff; }
.tabs { display: inline-flex; background: var(--bg); border-radius: 12px; padding: 4px; gap: 4px; margin-bottom: 14px; }
.tabs button { border: none; background: transparent; padding: 8px 16px; border-radius: 9px; font-weight: 700; color: var(--text-2); font-size: 14px; }
.tabs button.active { background: #fff; color: var(--brand); box-shadow: var(--shadow-sm); }
.ai-text { background: var(--brand-soft); border-radius: var(--radius-sm); padding: 14px; font-size: 14px; color: var(--text); }
.ai-text b { color: var(--brand-dark); }

/* ---------- 入库 / 实践展示 ---------- */
.prac-date { font-size: 13px; color: var(--muted); font-weight: 600; margin: 6px 2px 10px; }
.prac-card { border: 1px solid var(--line); border-radius: var(--radius); padding: 16px; margin-bottom: 14px; }
.prac-card .pc-title { font-weight: 800; font-size: 15px; margin-bottom: 4px; }
.prac-card .pc-meta { color: var(--muted); font-size: 12px; margin-bottom: 12px; }
.req { display: flex; gap: 10px; padding: 11px 12px; border-radius: 10px; background: var(--bg); margin-bottom: 8px; align-items: flex-start; }
.req .rk { width: 22px; height: 22px; border-radius: 6px; background: var(--brand); color: #fff; display: grid; place-items: center; font-size: 12px; font-weight: 800; flex: none; }
.req.fail { background: #FFF0F0; }
.req.fail .rk { background: var(--danger); }
.req .rbody { font-size: 14px; }
.req .rnote { font-size: 12px; color: var(--danger); font-weight: 600; margin-top: 3px; }
.req .rnote.ok { color: var(--ok); }

/* ---------- 考试水印 ---------- */
.watermark{position:fixed;inset:0;z-index:35;pointer-events:none;overflow:hidden;}
.watermark span{position:absolute;transform:rotate(-20deg);text-align:center;color:rgba(95,105,135,.14);-webkit-text-stroke:.5px rgba(95,105,135,.12);text-shadow:0 0 2px rgba(95,105,135,.12);user-select:none;line-height:1.3;}
.watermark .w1{display:block;font-size:15px;font-weight:800;letter-spacing:1px;white-space:nowrap;}
.watermark .w2{display:block;font-size:12px;font-weight:700;white-space:nowrap;margin-top:2px;}
/* 答题统计条 */
.exam-stats{position:relative;z-index:40;display:flex;flex-wrap:wrap;gap:8px;align-items:center;margin:4px 0 14px;padding:10px 14px;border-radius:12px;background:var(--brand-soft);color:var(--brand-dark);font-size:13px;font-weight:700;}
/* 考试防护：禁止选中/长按菜单，降低直接复制题目给 AI 的可能 */
body.exam-mode{-webkit-user-select:none;-webkit-touch-callout:none;-moz-user-select:none;user-select:none;}

/* ---------- 答题卡 AI 实践锁定态 ---------- */
.locked-note{display:inline-block;margin-bottom:10px;padding:4px 10px;border-radius:999px;background:var(--brand-soft);color:var(--brand);font-size:12px;font-weight:700;}
.q-title{font-weight:700;margin:6px 0 8px;font-size:14px;}

/* ---------- 统计小卡 ---------- */
.stats { display: grid; grid-template-columns: repeat(2, 1fr); gap: 12px; }
.stat { background: #fff; border: 1px solid var(--line); border-radius: var(--radius-sm); padding: 14px; }
.stat .s-num { font-size: 24px; font-weight: 800; }
.stat .s-lbl { color: var(--muted); font-size: 12px; }
.stat .s-num.yw { color: var(--chinese); }
.stat .s-num.sx { color: var(--math); }
.stat .s-num.yy { color: var(--english); }

/* ---------- 表格（管理员） ---------- */
.table { width: 100%; border-collapse: collapse; font-size: 13px; }
.table th, .table td { text-align: left; padding: 11px 12px; border-bottom: 1px solid var(--line); }
.table th { color: var(--muted); font-weight: 700; background: var(--bg); }
.table tr:hover td { background: #FBFDFF; }
.table .act { display: flex; gap: 6px; }

/* ---------- 题库模糊搜索联想下拉 ---------- */
.qsearch-wrap { position: relative; flex: 1 1 260px; max-width: 360px; }
.suggest-box {
  position: absolute; z-index: 60; left: 0; right: 0; top: calc(100% + 6px);
  background: #fff; border: 1px solid var(--line); border-radius: 12px;
  box-shadow: 0 18px 40px rgba(15, 23, 42, .16); max-height: 320px; overflow: auto; padding: 6px;
}
.suggest-item {
  padding: 9px 11px; border-radius: 9px; cursor: pointer; font-size: 13px; line-height: 1.5;
  border-bottom: 1px solid var(--line);
}
.suggest-item:last-child { border-bottom: none; }
.suggest-item:hover { background: var(--brand-soft); }
.suggest-meta { display: block; margin-top: 2px; color: var(--muted); font-size: 11px; }
.suggest-err {
  padding: 10px 12px; color: var(--danger); font-size: 12px; white-space: pre-wrap; line-height: 1.5;
}

/* ---------- 拍照识题入口（导航栏醒目按钮） ---------- */
.nav-photo {
  background: linear-gradient(135deg, #FF7A85, #FF9F43);
  color: #fff !important;
  font-weight: 800;
  padding: 6px 14px;
  border-radius: 999px;
  box-shadow: 0 6px 16px rgba(255, 122, 133, .35);
  animation: navPhotoPulse 1.8s ease-in-out infinite;
}
.nav-photo:hover { color: #fff !important; filter: brightness(1.05); }
@keyframes navPhotoPulse {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-2px); }
}
.tabbar a.nav-photo {
  color: #fff !important;
}
.tabbar a.nav-photo .ti { font-size: 20px; }

/* ---------- 拍照识题页面 ---------- */
.photo-card { background: var(--card); border-radius: var(--radius); padding: 20px; box-shadow: var(--shadow); margin-top: 14px; }
.photo-thumb { width: 100%; max-height: 320px; object-fit: contain; border-radius: var(--radius-sm); border: 1px solid var(--line); background: #fafbfe; }
.photo-result { margin-top: 16px; display: flex; flex-direction: column; gap: 14px; }
.rq-item { border: 1px solid var(--line-strong); border-radius: var(--radius-sm); padding: 14px; background: #fff; }
.rq-check { display: flex; align-items: center; gap: 6px; font-size: 13px; color: var(--brand-dark); font-weight: 700; margin-bottom: 8px; }
.rq-meta { display: flex; flex-wrap: wrap; gap: 6px; margin-bottom: 6px; }
.rq-q { font-size: 15px; line-height: 1.6; color: var(--text); margin-bottom: 8px; }
.rq-img { max-width: 100%; max-height: 200px; border-radius: 10px; margin: 8px 0; border: 1px solid var(--line); }
.rq-opts { font-size: 13px; color: var(--text-2); line-height: 1.8; margin: 4px 0; }
.rq-alt { font-size: 12px; color: var(--warn); margin: 4px 0; }
.rq-a { font-size: 13px; color: var(--ok); font-weight: 700; margin-top: 6px; }
.rq-s { font-size: 12.5px; color: var(--text-2); line-height: 1.6; margin-top: 4px; }

/* 相机 / 相册选择弹窗 */
.modal-mask { position: fixed; inset: 0; background: rgba(20, 28, 46, .45); display: flex; align-items: flex-end; justify-content: center; z-index: 80; }
.picker-modal { width: 100%; max-width: 460px; background: #fff; border-radius: 18px 18px 0 0; padding: 18px; }
.picker-modal .modal-title { font-weight: 800; text-align: center; margin-bottom: 14px; }

/* 错题库删除按钮 */
.wi-actions { display: inline-flex; align-items: center; gap: 8px; }
.btn.xsm { font-size: 11px; padding: 3px 9px; border-radius: 8px; }
.btn.xsm.wr-del { background: #fff0f0; color: var(--danger); border: 1px solid #ffd6d6; }
.btn.xsm.wr-del:hover { background: #ffe2e2; }

/* ---------- 登录页 ---------- */
.auth { min-height: 100vh; display: grid; place-items: center; padding: 24px; background:
  radial-gradient(1200px 500px at 50% -10%, #E4EDFF 0%, transparent 60%), var(--bg); }
.auth-card { width: 100%; max-width: 400px; background: #fff; border-radius: 22px; box-shadow: var(--shadow); padding: 28px; }
.auth-card .logo { display: flex; align-items: center; gap: 10px; font-weight: 800; font-size: 19px; margin-bottom: 6px; }
.auth-card .logo .dot { width: 32px; height: 32px; border-radius: 10px; background: linear-gradient(135deg, var(--brand), #7AA5FF); display: grid; place-items: center; color: #fff; }
.auth-card .tip { color: var(--muted); font-size: 13px; margin-bottom: 18px; }
.seg { display: flex; background: var(--bg); border-radius: 12px; padding: 4px; margin-bottom: 18px; }
.seg button { flex: 1; border: none; background: transparent; padding: 10px; border-radius: 9px; font-weight: 700; color: var(--text-2); }
.seg button.active { background: #fff; color: var(--brand); box-shadow: var(--shadow-sm); }

/* ---------- 提示条 ---------- */
.note { background: #FFF7E6; border: 1px solid #FFE2A8; color: #8a6400; border-radius: 12px; padding: 11px 14px; font-size: 13px; margin-bottom: 14px; }
.note.info { background: var(--brand-soft); border-color: #CFE0FF; color: var(--brand-dark); }
.note.ok { background: #E7FBF5; border-color: #B8EEDD; color: #1c8f74; }

/* ---------- PC 适配 ---------- */
@media (min-width: 960px) {
  .topbar { display: flex; }
  .tabbar { display: none; }
  .container { padding: 26px 26px 40px; }

  .stats { grid-template-columns: repeat(2, 1fr); }
  .quick { grid-template-columns: repeat(5, 1fr); }
  .radar-wrap { grid-template-columns: 1fr 1fr; }
  .cal { gap: 12px; }
  .q .opts.cols2 { grid-template-columns: 1fr 1fr; }
  .wrong-item .wi-q { font-size: 15px; }
}
@media (max-width: 959px) {
  .q .opts { grid-template-columns: 1fr; }
}

/* ---------- 快捷入口 ---------- */
.quick { display: grid; grid-template-columns: repeat(2, 1fr); gap: 10px; }
.qbtn { display: flex; flex-direction: column; align-items: center; gap: 6px; padding: 14px 6px; border: 1px solid var(--line); border-radius: 14px; color: var(--text); text-decoration: none; font-weight: 600; background: #fff; }
.qbtn span { font-size: 12px; color: var(--muted); }
.qbtn:hover { border-color: var(--brand); color: var(--brand); }

/* ---------- 汇总考试 ---------- */
.sum-opt { display: flex; align-items: center; gap: 10px; padding: 12px 14px; border: 1px solid var(--line-strong); border-radius: 12px; margin-bottom: 8px; cursor: pointer; }
.sum-opt input { accent-color: var(--brand); }
.sum-box { background: #fff; border: 1px solid var(--line); border-radius: var(--radius-sm); padding: 14px; margin-bottom: 12px; }
.score-banner { text-align: center; padding: 18px; border-radius: 14px; background: var(--brand-soft); color: var(--brand-dark); font-weight: 800; font-size: 18px; margin: 8px 0 16px; }

/* ---------- 实践汇总 / 收藏 ---------- */
.gallery { display: grid; gap: 4px; }
.fav-btn { border: 1px solid var(--line-strong); background: #fff; border-radius: 999px; padding: 5px 12px; font-size: 12px; font-weight: 700; color: var(--text-2); }
.fav-btn.on { background: #FFF3D6; border-color: #FFD98A; color: #B7791F; }
.ov { color: var(--danger); font-weight: 700; }

/* ---------- 导入页（题型库 / 错题库 共用） ---------- */
.import-steps { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 18px; }
.import-steps .step { display: flex; gap: 14px; align-items: flex-start; }
.import-steps .step-n { flex: 0 0 28px; width: 28px; height: 28px; border-radius: 50%; background: var(--brand); color: #fff; font-weight: 800; display: flex; align-items: center; justify-content: center; }
.import-steps .step-body { flex: 1; }
.import-steps .step-t { font-weight: 700; margin-bottom: 4px; }
.import-steps .step-d { color: var(--text-2); font-size: 13px; line-height: 1.7; margin-bottom: 10px; }
.file-input { display: block; margin-top: 6px; font-size: 13px; }
.import-result { margin-top: 18px; }
.import-result .ok { background: #EAF7EE; border: 1px solid #BCE6C8; color: #1F7A3D; padding: 12px 14px; border-radius: 12px; }
.import-result .err { background: #FDEEEE; border: 1px solid #F4C9C9; color: #B23B3B; padding: 12px 14px; border-radius: 12px; margin-top: 10px; }
.import-result .err ul { margin: 8px 0 0; padding-left: 18px; }
.import-result .err li { font-size: 13px; line-height: 1.6; }

/* 考题范围：点击弹出底部单选面板 */
.picker { display:flex; align-items:center; justify-content:space-between; background:#fff; border:1px solid var(--line-strong); border-radius:12px; padding:14px 16px; cursor:pointer; font-weight:700; }
.picker:active { background:var(--bg); }
.picker-value { color:var(--brand); }
.picker-arrow { color:var(--text-2); font-size:14px; }
.sheet-mask { position:fixed; left:0; right:0; top:0; bottom:0; background:rgba(0,0,0,.45); display:none; align-items:flex-end; justify-content:center; z-index:1000; }
.sheet { width:100%; max-width:560px; background:#fff; border-radius:18px 18px 0 0; padding:10px 0 calc(10px + env(safe-area-inset-bottom)); max-height:75vh; display:flex; flex-direction:column; transform:translateY(100%); transition:transform .22s ease; }
.sheet-mask.show .sheet { transform:translateY(0); }
.sheet-head { display:flex; align-items:center; justify-content:space-between; padding:12px 18px; font-weight:800; border-bottom:1px solid var(--line); }
.sheet-close { border:none; background:transparent; font-size:18px; color:var(--text-2); cursor:pointer; }
.sheet-list { overflow:auto; padding:6px 0; -webkit-overflow-scrolling:touch; }
.sheet-item { display:block; width:100%; text-align:left; border:none; background:transparent; padding:16px 18px; font-size:16px; color:var(--text); cursor:pointer; }
.sheet-item:active { background:var(--bg); }
.sheet-item.active { color:var(--brand); font-weight:800; background:var(--brand-soft, #EEF3FF); }

/* 拍照识题：结果卡片 */
.rq-card { border:1px solid var(--line); border-radius:14px; padding:14px; margin-bottom:12px; background:#fff; }
.rq-top { display:flex; align-items:center; gap:8px; flex-wrap:wrap; margin-bottom:8px; }
.rq-top select { padding:6px 8px; border:1px solid var(--line-strong); border-radius:8px; background:#fff; }
.wr-check { display:inline-flex; align-items:center; gap:4px; white-space:nowrap; font-size:13px; color:var(--text-2); margin-right:auto; }
.rq-card input[data-f=knowledge_tag] { width:100%; padding:6px 10px; margin-bottom:6px; border:1px solid var(--line); border-radius:8px; }
.rq-card textarea { width:100%; resize:vertical; border:1px solid var(--line); border-radius:8px; padding:8px; }
.rq-card .opt-row { display:flex; gap:6px; margin-bottom:4px; }
.rq-card .opt-row input { flex:1; padding:6px 8px; border:1px solid var(--line); border-radius:8px; }
.rq-img-prev { max-width:100%; max-height:180px; object-fit:contain; border-radius:8px; margin:8px 0; }

/* 错题每日练：学段分组 */
.band-group { margin-top: 14px; }
.band-title { font-size: 13px; font-weight: 700; color: var(--brand); margin: 4px 0 8px; }
.band-group .quick { margin-top: 0; }
.qbtn.small { padding: 10px 6px; }
.qbtn.small span { font-size: 11px; }