/* ============================================================
   错题学习与打卡系统 · 家长看板
   纯静态 · 无外部依赖 · 移动优先响应式
   ============================================================ */
:root{
  --bg:#eef1f8; --card:#ffffff; --line:#e6e9f3;
  --ink:#232a3b; --mut:#8a93a8; --mut2:#b3bacb;
  --brand:#5a6cf3; --brand2:#8b5cf6; --brand-soft:#ecefff;
  --ok:#16a34a; --ok-soft:#e5f6ec;
  --bad:#e5484d; --bad-soft:#fdecec;
  --warn:#f59e0b; --warn-soft:#fef3e2;
  --zh:#e8734a; --zh-soft:#fdeee7;   /* 语文 */
  --ma:#0f9d6e; --ma-soft:#e3f5ee;   /* 数学 */
  --en:#2f7fe0; --en-soft:#e6f0fd;   /* 英语 */
  --r:18px;
  --shadow:0 10px 28px rgba(38,48,110,.08);
  --sat:env(safe-area-inset-bottom,0px);
}
*{box-sizing:border-box;-webkit-tap-highlight-color:transparent}
html,body{margin:0;padding:0}
body{
  font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC",sans-serif;
  background:var(--bg); color:var(--ink);
  font-size:15px; line-height:1.55;
  -webkit-font-smoothing:antialiased;
}
body.no-scroll{overflow:hidden}
button{font-family:inherit;cursor:pointer;border:none;background:none;color:inherit;padding:0}
input,select,textarea{font-family:inherit;font-size:15px;color:var(--ink)}
.bg-decor{position:fixed;inset:0;z-index:-1;
  background:
    radial-gradient(420px 260px at 88% -6%,rgba(139,92,246,.16),transparent 70%),
    radial-gradient(420px 260px at -10% 12%,rgba(90,108,243,.12),transparent 70%),
    var(--bg);
}
h1,h2,h3{margin:0;line-height:1.3}
h2{font-size:16px;font-weight:700}
h3{font-size:17px;font-weight:700}
p{margin:0}
.muted{color:var(--mut)} .small{font-size:12.5px} .center{text-align:center}
a{color:var(--brand)}

/* ---------- 顶栏 ---------- */
.appbar{position:sticky;top:0;z-index:30;backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px);
  background:rgba(255,255,255,.82);border-bottom:1px solid var(--line)}
.appbar-inner{max-width:680px;margin:auto;display:flex;align-items:center;justify-content:space-between;
  padding:12px 16px;min-height:52px}
.appbar h1{font-size:17px;font-weight:800;letter-spacing:.5px}
.appbar-side{display:flex;align-items:center;gap:8px}
.chip{display:inline-flex;align-items:center;gap:5px;font-size:11.5px;padding:3px 9px;border-radius:99px;font-weight:600}
.chip .dot{width:7px;height:7px;border-radius:50%;background:currentColor}
.chip-on{background:var(--ok-soft);color:var(--ok)}
.chip-warn{background:var(--warn-soft);color:#b45309}
.chip-off{background:#eef0f5;color:var(--mut)}
.pills{background:linear-gradient(135deg,var(--brand),var(--brand2));color:#fff;font-size:12.5px;
  padding:4px 11px;border-radius:99px;box-shadow:0 4px 12px rgba(90,108,243,.35)}
.pills b{font-size:13.5px}

/* ---------- 布局 ---------- */
#app{max-width:680px;margin:0 auto;padding:14px 14px 108px}
.view{display:none}
.view.active{display:block;animation:fadeUp .28s ease}
@keyframes fadeUp{from{opacity:0;transform:translateY(8px)}to{opacity:1;transform:none}}
.card{background:var(--card);border-radius:var(--r);padding:16px;margin:0 0 14px;
  box-shadow:var(--shadow);border:1px solid rgba(230,233,243,.6)}
.card-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:12px;gap:8px}
.card-head h2{display:flex;align-items:center;gap:6px}
.card-head h2::before{content:"";width:4px;height:15px;border-radius:3px;
  background:linear-gradient(180deg,var(--brand),var(--brand2))}
.link{color:var(--brand);font-size:12.5px;font-weight:600}
.footnote{text-align:center;color:var(--mut2);font-size:11.5px;margin:16px 0 4px}
.empty{text-align:center;color:var(--mut);padding:26px 10px;font-size:14px;line-height:2}
.empty span{font-size:12px;color:var(--mut2)}

/* ---------- 首页 hero ---------- */
.hero{position:relative;overflow:hidden;color:#fff;border-radius:22px;padding:20px 18px;margin-bottom:14px;
  background:linear-gradient(135deg,#5a6cf3 0%,#7c5cf0 55%,#9a5cf0 100%);
  box-shadow:0 14px 30px rgba(90,108,243,.35)}
.hero::before,.hero::after{content:"";position:absolute;border-radius:50%;background:rgba(255,255,255,.10)}
.hero::before{width:190px;height:190px;right:-60px;top:-70px}
.hero::after{width:130px;height:130px;left:-40px;bottom:-60px}
.hero-top{display:flex;justify-content:space-between;align-items:flex-start;position:relative;z-index:1}
.hero-hi{font-size:20px;font-weight:800;letter-spacing:.3px}
.hero-sub{font-size:12.5px;opacity:.85;margin-top:2px}
.hero-date{font-size:12px;background:rgba(255,255,255,.18);padding:5px 10px;border-radius:99px;white-space:nowrap}
.hero-stats{display:flex;margin:16px 0 14px;position:relative;z-index:1}
.hstat{flex:1;text-align:center}
.hstat+.hstat{border-left:1px solid rgba(255,255,255,.18)}
.hs-num{font-size:24px;font-weight:800;line-height:1.2}
.hs-lab{font-size:11px;opacity:.85;margin-top:2px}
.hero-quick{display:grid;grid-template-columns:repeat(4,1fr);gap:8px;position:relative;z-index:1}
.qk{background:rgba(255,255,255,.16);border:1px solid rgba(255,255,255,.25);border-radius:14px;
  padding:9px 4px;font-size:11.5px;color:#fff;font-weight:600;transition:.15s;backdrop-filter:blur(4px)}
.qk span{display:block;font-size:19px;margin-bottom:3px}
.qk:active{transform:scale(.95);background:rgba(255,255,255,.28)}
.hero-ck{background:linear-gradient(135deg,#0f9d6e,#14b8a6)}

/* ---------- 首页 tiles ---------- */
.tiles{display:grid;grid-template-columns:repeat(3,1fr);gap:10px}
.tile{background:#f7f8fd;border:1px solid var(--line);border-radius:16px;padding:12px 8px;text-align:center}
.tile-ic{font-size:21px}
.tile-num{font-size:21px;font-weight:800;margin-top:2px}
.tile-red .tile-num{color:var(--bad)} .tile-green .tile-num{color:var(--ok)} .tile-blue .tile-num{color:var(--en)}
.tile-lab{font-size:11px;color:var(--mut);margin-top:1px}

/* ---------- 列表通用 ---------- */
.row{display:flex;align-items:center;gap:12px;padding:11px 0;border-bottom:1px dashed var(--line)}
.row:last-child{border-bottom:none;padding-bottom:2px}
.av{width:42px;height:42px;border-radius:13px;display:flex;align-items:center;justify-content:center;
  font-size:20px;flex:0 0 auto}
.av-zh{background:var(--zh-soft)} .av-ma{background:var(--ma-soft)} .av-en{background:var(--en-soft)}
.av-grey{background:#f0f1f6}
.row-main{flex:1;min-width:0}
.row-title{font-size:14px;font-weight:600;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.row-sub{font-size:12px;color:var(--mut);margin-top:1px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.row-end{text-align:right;flex:0 0 auto}
.row-end .big{font-size:15px;font-weight:800}
.pos{color:var(--ok)} .neg{color:var(--bad)}

/* ---------- 标签 / 按钮 ---------- */
.tag{display:inline-block;font-size:11px;font-weight:700;padding:2px 8px;border-radius:7px;vertical-align:middle}
.tag-sub-语文{background:var(--zh-soft);color:var(--zh)}
.tag-sub-数学{background:var(--ma-soft);color:var(--ma)}
.tag-sub-英语{background:var(--en-soft);color:var(--en)}
.tag-ghost{background:#f0f1f6;color:var(--mut)}
.tag-ok{background:var(--ok-soft);color:var(--ok)}
.tag-bad{background:var(--bad-soft);color:var(--bad)}
.tag-warn{background:var(--warn-soft);color:#b45309}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:6px;border-radius:13px;
  padding:11px 18px;font-size:14.5px;font-weight:700;transition:.15s;user-select:none}
.btn:active{transform:scale(.97)}
.btn-primary{background:linear-gradient(135deg,var(--brand),var(--brand2));color:#fff;
  box-shadow:0 8px 18px rgba(90,108,243,.35)}
.btn-soft{background:var(--brand-soft);color:var(--brand)}
.btn-ghost{background:transparent;color:var(--mut);border:1px solid var(--line)}
.btn-danger{background:var(--bad-soft);color:var(--bad)}
.btn-block{width:100%}
.btn[disabled]{opacity:.5;pointer-events:none}
.btn-lg{padding:14px 20px;font-size:16px}
.btn-sm{padding:7px 13px;font-size:13px;border-radius:10px}
.btn-primary:active,.btn-soft:active,.btn-danger:active{filter:brightness(.94)}

.chipbtn{font-size:13px;font-weight:600;padding:7px 15px;border-radius:99px;background:#fff;
  color:var(--mut);border:1px solid var(--line)}
.chipbtn.active{background:linear-gradient(135deg,var(--brand),var(--brand2));color:#fff;border-color:transparent;
  box-shadow:0 4px 10px rgba(90,108,243,.3)}
.filter-row{display:flex;gap:8px;margin:2px 2px 10px;flex-wrap:wrap}
.list-head{margin:2px 2px 8px}
.list-head span{font-size:12px;color:var(--mut);font-weight:600}

/* ---------- CTA 卡片（错题本顶部） ---------- */
.card-cta{background:linear-gradient(135deg,#fff,#f4f5ff)}
.cta-desc{font-size:13px;color:var(--mut);margin-bottom:12px}
.cta-btns{display:grid;grid-template-columns:1fr 1fr;gap:10px}

/* ---------- 错题卡片 ---------- */
.qlist{display:flex;flex-direction:column;gap:10px}
.qcard2{background:#fff;border:1px solid var(--line);border-radius:16px;padding:13px 14px;
  box-shadow:0 4px 12px rgba(38,48,110,.05);display:flex;flex-direction:column;gap:8px}
.qc-top{display:flex;align-items:center;gap:7px;flex-wrap:wrap}
.qc-stem{font-size:14.5px;font-weight:600;line-height:1.6}
.qc-ans{font-size:12.5px;background:#f7f8fd;border-radius:10px;padding:7px 10px;color:var(--mut)}
.qc-ans b{color:var(--ok);font-weight:700}
.qc-ans .wrong{color:var(--bad)}
.qc-actions{display:flex;gap:8px;justify-content:flex-end;margin-top:2px}
.qc-meta{font-size:11.5px;color:var(--mut);display:flex;align-items:center;gap:6px;flex-wrap:wrap}
.qc-meta .dot2{width:6px;height:6px;border-radius:50%;background:var(--mut2);display:inline-block}
.difficulty-bar{height:6px;border-radius:99px;background:#f0f1f6;overflow:hidden;min-width:90px;flex:0 0 110px}
.difficulty-bar i{display:block;height:100%;border-radius:99px;background:linear-gradient(90deg,#34d399,#fbbf24,#f87171)}
.diff-lab{font-size:11px;font-weight:700}

/* ---------- 表单 ---------- */
.field{margin-bottom:13px}
.field label{display:block;font-size:12.5px;font-weight:700;color:var(--mut);margin-bottom:6px}
.field input[type=text],.field input:not([type]),.field input[type=password],
.field input,.field select,.field textarea{
  width:100%;border:1.5px solid var(--line);border-radius:12px;padding:10px 12px;background:#fbfcff;
  outline:none;transition:.15s;resize:vertical}
.field input:focus,.field select:focus,.field textarea:focus{border-color:var(--brand);background:#fff;
  box-shadow:0 0 0 3px rgba(90,108,243,.14)}
.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:0 12px}
.opts{margin-bottom:6px}
.opt-line{display:flex;align-items:center;gap:8px;margin-bottom:8px}
.opt-key{width:24px;height:24px;flex:0 0 auto;border-radius:8px;background:#f0f1f6;color:var(--mut);
  display:flex;align-items:center;justify-content:center;font-size:12.5px;font-weight:800}
.opt-line input[type=text]{flex:1;border:1.5px solid var(--line);border-radius:10px;padding:8px 10px;
  background:#fbfcff;outline:none}
.opt-line input[type=radio]{width:18px;height:18px;accent-color:var(--brand);flex:0 0 auto}
.judge-zone .seg{margin-top:4px}

/* ---------- segmented ---------- */
.seg{display:grid;grid-template-columns:repeat(3,1fr);gap:0;background:#f0f1f6;border-radius:13px;padding:4px}
.seg-btn{border-radius:10px;padding:9px 0;font-size:14px;font-weight:700;color:var(--mut);transition:.15s}
.seg-btn.active{background:#fff;color:var(--brand);box-shadow:0 3px 8px rgba(38,48,110,.14)}
.seg-2{grid-template-columns:repeat(2,1fr)}

/* ---------- 练习 ---------- */
.qcard .qmeta{display:flex;align-items:center;gap:8px;margin-bottom:10px;flex-wrap:wrap}
.qnum{font-size:13px;font-weight:800;background:var(--brand-soft);color:var(--brand);
  padding:3px 10px;border-radius:99px}
.prog{height:8px;border-radius:99px;background:#f0f1f6;overflow:hidden;margin-bottom:14px}
.prog-fill{height:100%;width:0;border-radius:99px;background:linear-gradient(90deg,var(--brand),var(--brand2));
  transition:width .35s ease}
.stem{font-size:17px;font-weight:700;line-height:1.75;margin-bottom:14px}
.opts2{display:flex;flex-direction:column;gap:9px}
.opt2{display:flex;align-items:center;gap:11px;border:1.5px solid var(--line);border-radius:14px;
  padding:12px 14px;background:#fbfcff;text-align:left;font-size:15px;transition:.12s;width:100%}
.opt2 .ok{width:26px;height:26px;flex:0 0 auto;border-radius:50%;border:2px solid var(--mut2);
  display:flex;align-items:center;justify-content:center;font-size:12px;font-weight:800;color:transparent}
.opt2:active{background:#f2f3ff}
.opt2.sel{border-color:var(--brand);background:var(--brand-soft)}
.opt2.sel .ok{border-color:var(--brand);background:var(--brand);color:#fff}
.opt2.correct{border-color:var(--ok);background:var(--ok-soft)}
.opt2.correct .ok{border-color:var(--ok);background:var(--ok);color:#fff}
.opt2.wrong{border-color:var(--bad);background:var(--bad-soft)}
.opt2.wrong .ok{border-color:var(--bad);background:var(--bad);color:#fff}
.opt2:disabled{opacity:.85}
#pqArea input[type=text]{width:100%;border:2px solid var(--line);border-radius:14px;padding:13px 15px;
  font-size:17px;background:#fbfcff;outline:none}
#pqArea input[type=text]:focus{border-color:var(--brand);background:#fff;box-shadow:0 0 0 3px rgba(90,108,243,.14)}
.cause-box{margin-top:14px;background:#fff7ed;border:1px solid #fed7aa;border-radius:14px;padding:12px}
.cause-title{font-size:13px;font-weight:700;color:#b45309;margin-bottom:9px}
.cause-chips{display:flex;flex-wrap:wrap;gap:7px}
.cause{font-size:12.5px;padding:6px 12px;border-radius:99px;background:#fff;border:1.5px solid #fed7aa;
  color:#92400e;font-weight:600}
.cause.on{background:#f59e0b;border-color:#f59e0b;color:#fff}
.fbs{margin-top:14px;border-radius:14px;padding:13px 14px;background:#f7f8fd}
.fb-line{display:flex;justify-content:space-between;align-items:center;margin-bottom:6px}
.fb-ans{font-size:14.5px;font-weight:700;margin-bottom:4px}
.fb-ans b.ok{color:var(--ok)} .fb-ans b.no{color:var(--bad)}
.fb-exp{font-size:13px;color:var(--mut);line-height:1.7}
.qcard .btn{margin-top:14px}
#pqQuit{margin-top:8px}

/* ---------- 结果 ---------- */
.result-card{text-align:center;padding:24px 16px}
.ring{width:150px;height:150px;margin:8px auto 14px;border-radius:50%;display:flex;align-items:center;
  justify-content:center;position:relative;background:conic-gradient(var(--brand) var(--p,0%),#eef0f6 0)}
.ring::before{content:"";position:absolute;inset:11px;background:#fff;border-radius:50%}
.ring span{position:relative;z-index:1;font-size:28px;font-weight:800;color:var(--brand)}
.result-stats{display:flex;gap:8px;margin:14px 0 20px}
.rstat{flex:1;background:#f7f8fd;border-radius:14px;padding:11px 4px}
.rstat .n{font-size:20px;font-weight:800}
.rstat .n.ok{color:var(--ok)} .rstat .n.no{color:var(--bad)}
.rstat .l{font-size:11px;color:var(--mut)}
.result-card .qlist{text-align:left;margin-bottom:18px}

/* ---------- 打卡 ---------- */
.ck-streak{background:rgba(255,255,255,.16);border:1px solid rgba(255,255,255,.25);border-radius:16px;
  padding:8px 16px;text-align:center}
.ck-streak-num{font-size:24px;font-weight:800;line-height:1.1}
.ck-streak-lab{font-size:10.5px;opacity:.9}
.milestone-strip{display:flex;gap:6px;margin-top:14px;position:relative;z-index:1}
.ms{flex:1;background:rgba(255,255,255,.14);border:1px solid rgba(255,255,255,.22);border-radius:12px;
  text-align:center;padding:7px 2px;font-size:11px}
.ms b{display:block;font-size:15px}
.ms.ach{background:#fff;color:#0f9d6e;border-color:#fff}
.all-done{background:var(--ok-soft);border:1px dashed var(--ok);color:var(--ok);border-radius:14px;
  padding:13px;text-align:center;font-weight:700}
.task-item{display:flex;align-items:center;gap:13px;padding:12px 0;border-bottom:1px dashed var(--line)}
.task-item:last-child{border:none;padding-bottom:2px}
.task-info{flex:1;min-width:0}
.task-name{font-size:15px;font-weight:700}
.task-name .sub{font-weight:400;font-size:11.5px;color:var(--mut);margin-left:6px}
.task-desc{font-size:12px;color:var(--mut);margin-top:2px;overflow:hidden;text-overflow:ellipsis;
  white-space:nowrap}
.task-prog{font-size:11.5px;color:var(--brand);font-weight:700;white-space:nowrap}

/* 打卡弹窗 */
.task-body{padding-top:6px}
.task-card{text-align:center;padding:6px 0}
.task-num{font-size:13px;color:var(--mut);font-weight:700;margin-bottom:12px}
.task-prompt{font-size:19px;font-weight:800;line-height:1.7;margin-bottom:18px;padding:18px 6px;
  background:linear-gradient(135deg,#f4f5ff,#eef0fb);border-radius:16px}
.task-target{margin:-8px auto 16px;padding:10px 16px;max-width:100%;box-sizing:border-box;border:1px solid #cfd5ff;
  border-radius:12px;background:#fafaff;color:#4b58c6;font-size:15px;font-weight:700;line-height:1.5}
.task-target b{display:inline-block;margin:0 4px;color:#26359e;font-size:22px;letter-spacing:.08em}
.task-body input[type=text]{width:100%;border:2px solid var(--line);border-radius:14px;padding:13px 15px;
  font-size:17px;text-align:center;background:#fff;outline:none;margin-bottom:12px}
.task-body input[type=text]:focus{border-color:var(--brand);box-shadow:0 0 0 3px rgba(90,108,243,.14)}

/* ---------- 奖励 ---------- */
.balance-card{background:linear-gradient(135deg,#5a6cf3,#8b5cf6);color:#fff;text-align:center;
  padding:20px 18px}
.bal-lab{font-size:12.5px;opacity:.85;letter-spacing:2px}
.bal-num{font-size:44px;font-weight:800;line-height:1.25;margin:2px 0 12px}
.bal-unit{font-size:15px;font-weight:600;opacity:.85;margin-left:4px}
.bal-bar{height:9px;border-radius:99px;background:rgba(255,255,255,.22);overflow:hidden;margin-bottom:8px}
.bal-bar-fill{height:100%;border-radius:99px;background:#fff;width:0;transition:width .6s ease}
.bal-mile{font-size:12px;opacity:.92}
.milestones{display:grid;grid-template-columns:repeat(4,1fr);gap:8px}
.ms-card{text-align:center;border:1px solid var(--line);border-radius:14px;padding:11px 4px}
.ms-card .ic{font-size:21px}
.ms-card .d{font-size:11.5px;color:var(--mut);font-weight:700;margin-top:2px}
.ms-card .g{font-size:11px;font-weight:800;color:var(--brand)}
.ms-card.done{background:var(--ok-soft);border-color:#bfe8cd}
.ms-card.done .g{color:var(--ok)}
.ms-card .st{font-size:10px;color:var(--mut);margin-top:2px}
.rules{display:flex;flex-direction:column;gap:6px}
.rule{display:flex;justify-content:space-between;font-size:13px;padding:6px 0;border-bottom:1px dashed var(--line)}
.rule:last-child{border:none}
.rule b{color:var(--brand);font-weight:800}
.shop{display:grid;grid-template-columns:repeat(2,1fr);gap:10px}
.shop-item{position:relative;border:1px solid var(--line);border-radius:16px;padding:14px 12px 12px;
  display:flex;flex-direction:column;align-items:center;gap:6px;background:linear-gradient(180deg,#fbfcff,#fff);
  transition:.12s}
.shop-item:active{transform:scale(.97);border-color:var(--brand)}
.shop-item .ic{font-size:34px}
.shop-item .nm{font-size:13.5px;font-weight:700;text-align:center;line-height:1.4;min-height:37px}
.shop-item .cost{display:flex;align-items:center;gap:4px;font-size:12.5px;color:var(--mut)}
.shop-item .cost b{font-size:15px;color:var(--warn)}
.shop-item .sold{font-size:10.5px;color:var(--mut2)}
.shop-btn{width:100%;border-radius:10px;padding:7px 0;font-size:12.5px;font-weight:800}
.stock-mini{position:absolute;top:8px;right:8px;font-size:10px;color:var(--mut2)}

/* ---------- 弹窗通用 ---------- */
.modal{position:fixed;inset:0;z-index:60;display:flex;align-items:flex-end;justify-content:center}
.modal[hidden]{display:none}
.mask{position:absolute;inset:0;background:rgba(20,24,42,.45);backdrop-filter:blur(2px);-webkit-backdrop-filter:blur(2px)}
.sheet{position:relative;background:#fff;border-radius:24px 24px 0 0;width:100%;max-width:560px;
  max-height:88vh;display:flex;flex-direction:column;animation:slideUp .25s ease}
.sheet-small{max-width:440px}
@keyframes slideUp{from{transform:translateY(60px);opacity:.4}to{transform:none;opacity:1}}
.sheet-head{display:flex;align-items:center;justify-content:space-between;gap:8px;
  padding:18px 18px 10px}
.sheet-head h3{font-size:17px}
.x{width:30px;height:30px;border-radius:50%;background:#f0f1f6;color:var(--mut);font-size:14px;
  display:flex;align-items:center;justify-content:center;flex:0 0 auto}
.sheet-body{padding:6px 18px 10px;overflow-y:auto;-webkit-overflow-scrolling:touch}
.sheet-foot{display:flex;gap:10px;padding:10px 18px calc(16px + var(--sat));border-top:1px solid var(--line)}
.sheet-foot .btn{flex:1}

/* 上传 drop */
.drop{border:2px dashed var(--line);border-radius:16px;padding:22px 12px;text-align:center;
  background:#fbfcff;transition:.15s;margin-bottom:13px}
.drop.over{border-color:var(--brand);background:var(--brand-soft)}
.drop-ic{font-size:30px}
.drop-txt{font-size:14px;font-weight:600;margin-top:6px}
.drop-txt span{font-size:11.5px;color:var(--mut);font-weight:400}
.up-preview{margin-bottom:13px;border-radius:14px;overflow:hidden;border:1px solid var(--line);
  position:relative;background:#f7f8fd}
.up-preview img{width:100%;max-height:210px;object-fit:contain;display:block;background:#fff}
.up-preview .pdf-chip{padding:16px;text-align:center;color:var(--mut);font-weight:700}
.ocr-line{margin-top:4px}
.ocr-bar{height:8px;border-radius:99px;background:#f0f1f6;overflow:hidden;margin-bottom:7px}
.ocr-fill{height:100%;width:0;background:linear-gradient(90deg,var(--brand),var(--brand2));border-radius:99px;
  transition:width .2s}
#ocrText{font-size:12px;color:var(--mut)}

/* ---------- 庆祝 ---------- */
.center-modal{align-items:center;padding:20px}
.celebrate{position:relative;background:#fff;border-radius:24px;max-width:340px;width:100%;
  padding:34px 24px 24px;text-align:center;overflow:hidden;animation:pop .35s cubic-bezier(.34,1.56,.64,1)}
@keyframes pop{from{transform:scale(.6);opacity:0}to{transform:none;opacity:1}}
.stamp{font-size:56px;animation:bounce .7s ease .1s both}
@keyframes bounce{0%{transform:scale(0) rotate(-20deg)}60%{transform:scale(1.25) rotate(6deg)}100%{transform:scale(1)}}
.celebrate-title{font-size:21px;font-weight:800;margin-top:10px}
.celebrate-sub{font-size:13px;color:var(--mut);margin-top:4px}
.celebrate-gains{margin:16px 0 4px;display:flex;flex-direction:column;gap:7px}
.gain{display:flex;justify-content:space-between;font-size:14px;font-weight:600;
  background:var(--warn-soft);color:#b45309;border-radius:11px;padding:9px 13px}
.gain.pt{background:var(--brand-soft);color:var(--brand)}
.gain b{font-weight:800}
.confetti{position:absolute;inset:0;pointer-events:none;overflow:hidden}
.confetti i{position:absolute;top:-14px;width:9px;height:14px;border-radius:2px;opacity:.95;
  animation:fall linear forwards}
@keyframes fall{to{transform:translateY(520px) rotate(720deg);opacity:.2}}

/* ---------- toast ---------- */
#toasts{position:fixed;top:14px;left:0;right:0;z-index:99;display:flex;flex-direction:column;
  align-items:center;gap:8px;pointer-events:none}
.toast{background:#232a3b;color:#fff;font-size:13.5px;font-weight:600;padding:10px 18px;border-radius:99px;
  box-shadow:0 10px 26px rgba(0,0,0,.25);max-width:86vw;text-align:center;
  animation:toastIn .25s ease;display:flex;align-items:center;gap:7px}
.toast.ok{background:#16a34a} .toast.bad{background:#e5484d}
@keyframes toastIn{from{transform:translateY(-14px);opacity:0}to{transform:none;opacity:1}}
.toast.out{animation:toastOut .3s ease forwards}
@keyframes toastOut{to{transform:translateY(-14px);opacity:0}}

/* ---------- 底部导航 ---------- */
.tabbar{position:fixed;bottom:0;left:0;right:0;z-index:40;display:flex;
  background:rgba(255,255,255,.94);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);
  border-top:1px solid var(--line);padding-bottom:var(--sat)}
.tabbar-inner{max-width:680px;margin:auto;width:100%}
.tab{flex:1;display:flex;flex-direction:column;align-items:center;gap:2px;padding:8px 0 7px;
  font-size:10.5px;color:var(--mut);font-weight:600;transition:.12s}
.tab svg{width:22px;height:22px;fill:none;stroke:currentColor;stroke-width:1.9;stroke-linecap:round;
  stroke-linejoin:round}
.tab.active{color:var(--brand)}
.tab.active span{font-weight:800}
.tab:active{transform:scale(.92)}

/* ---------- 生字本 ---------- */
.vb-add{display:flex;gap:9px;margin-top:13px}.vb-add input{min-width:0;flex:1}.vb-add input:nth-child(2){flex:1.2}
.vb-search{margin:10px 0 0}.vb-search input{width:100%}
.vb-list{display:flex;flex-direction:column;gap:9px}
.vb-item{display:grid;grid-template-columns:minmax(0,1fr) auto;align-items:center;gap:3px 10px;padding:13px 14px;border:1px solid var(--line);border-radius:15px;background:#fff}
.vb-item.mastered{background:#f4fbf6;border-color:#ccebd5}.vb-word{font-size:18px;font-weight:800;letter-spacing:.04em}.vb-pinyin{font-size:13px;color:var(--brand);font-weight:700;grid-column:1}.vb-meta{font-size:11px;color:var(--mut);grid-column:1}.vb-actions{grid-column:2;grid-row:1 / span 3;display:flex;align-items:center;gap:7px}.vb-del{color:#9ca3af;background:transparent;padding:7px;font-size:14px}.vb-del:active{color:#e5484d}
.qcard-image{display:block;max-width:min(100%,520px);max-height:310px;margin:12px 0 4px;border:1px solid var(--line);border-radius:12px;background:#f8fafc}
.role-chip{border:1px solid var(--line);background:#fff;color:var(--mut);border-radius:999px;padding:6px 10px;font-size:12px;font-weight:700}.role-chip.on{background:#ede9fe;border-color:#c4b5fd;color:#6d28d9}

/* ---------- 弱知识点 ---------- */
.weak-item{padding:9px 0;border-bottom:1px dashed var(--line)}
.weak-item:last-child{border:none;padding-bottom:2px}
.weak-top{display:flex;justify-content:space-between;align-items:center;font-size:13.5px;font-weight:700;margin-bottom:6px}
.weak-top .k{display:flex;align-items:center;gap:7px}
.weak-top .c{font-size:11.5px;font-weight:800}
.weak-bar{height:7px;border-radius:99px;background:#f0f1f6;overflow:hidden}
.weak-bar i{display:block;height:100%;border-radius:99px}

/* 图表 */
.chart{display:flex;align-items:flex-end;justify-content:space-between;gap:10px;height:150px;padding-top:8px}
.cbar{flex:1;display:flex;flex-direction:column;align-items:center;gap:5px;height:100%;justify-content:flex-end}
.cbar .v{font-size:11px;font-weight:800;color:var(--mut)}
.cbar .b{width:100%;max-width:34px;border-radius:8px 8px 4px 4px;min-height:4px;
  background:linear-gradient(180deg,var(--brand),var(--brand2));transition:height .5s ease;position:relative}
.cbar.today .b{background:linear-gradient(180deg,#f59e0b,#f97316)}
.cbar .d{font-size:10.5px;color:var(--mut)}

/* 宽屏适配 */
@media(min-width:760px){
  #app{padding:20px 20px 120px}
  .sheet{border-radius:24px;margin-bottom:auto;margin-top:7vh}
  .modal{align-items:center}
}
@media(prefers-reduced-motion:reduce){
  *{animation-duration:.01ms !important;transition-duration:.01ms !important}
}