:root{
  --pri:#3b82f6; --pri-d:#2563eb; --pri-l:#dbeafe;
  --ok:#10b981; --warn:#f59e0b; --bad:#ef4444;
  --bg:#f4f6fb; --card:#fff; --txt:#1f2937; --mut:#6b7280; --line:#eef1f6;
  --r:14px; --sh:0 2px 12px rgba(17,24,39,.06);
}
*{box-sizing:border-box;-webkit-tap-highlight-color:transparent}
html,body{margin:0;padding:0;height:100%}
body{
  font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Helvetica Neue","Microsoft YaHei",sans-serif;
  background:var(--bg); color:var(--txt); font-size:15px; line-height:1.5;
  max-width:520px; margin:0 auto; position:relative; overflow-x:hidden;
}
button{font-family:inherit;font-size:inherit;cursor:pointer;border:0;background:none;color:inherit}
input,textarea,select{font-family:inherit;font-size:16px}

.view{display:none;min-height:100%;flex-direction:column}
.view.active{display:flex}
.view.overlay{position:fixed;inset:0;max-width:520px;margin:0 auto;background:var(--bg);z-index:60;overflow-y:auto}

/* ---------- 登录 ---------- */
.auth-wrap{padding:28px 20px 40px;flex:1}
.auth-hero{text-align:center;padding:26px 0 22px}
.auth-logo{
  width:78px;height:78px;margin:0 auto 14px;border-radius:22px;
  background:#fff;display:flex;align-items:center;justify-content:center;
  box-shadow:0 8px 22px rgba(15,23,42,.13);
}
.auth-logo img{width:64px;height:64px;display:block}
.auth-hero h1{margin:0 0 6px;font-size:25px;letter-spacing:1px}
.auth-hero p{margin:0;color:var(--mut);font-size:13.5px}
.auth-card{background:var(--card);border-radius:18px;padding:20px 18px;box-shadow:var(--sh)}
.seg{display:flex;background:var(--bg);border-radius:11px;padding:4px;margin-bottom:18px}
.seg.small{margin:0 0 14px}
.seg-btn{flex:1;padding:9px 0;border-radius:8px;color:var(--mut);font-size:14px;font-weight:600}
.seg-btn.active{background:#fff;color:var(--pri);box-shadow:0 1px 4px rgba(0,0,0,.08)}
.field{margin-bottom:14px}
.field label{display:block;font-size:12.5px;color:var(--mut);margin-bottom:6px}
.field input,.field select{
  width:100%;padding:12px 13px;border:1px solid var(--line);border-radius:11px;background:#fbfcfe;outline:none;
  appearance:none;-webkit-appearance:none
}
.field input:focus,.field select:focus{border-color:var(--pri);background:#fff}
.field select{
  background-image:url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='12' height='8'><path d='M1 1l5 5 5-5' fill='none' stroke='%236b7280' stroke-width='2' stroke-linecap='round'/></svg>");
  background-repeat:no-repeat;background-position:right 14px center;padding-right:34px
}

/* 密码强度 */
.pwd-box{margin-top:9px}
.pwd-meter{height:5px;background:var(--line);border-radius:5px;overflow:hidden}
.pwd-meter i{display:block;height:100%;width:0;border-radius:5px;transition:.25s}
.pwd-tip{font-size:12px;color:var(--mut);margin-top:7px}
.pwd-chk{display:flex;gap:7px;margin-top:8px;flex-wrap:wrap}
.pwd-chk span{font-size:11.5px;color:var(--mut);background:var(--bg);padding:3px 9px;border-radius:20px}
.pwd-chk span.hit{background:#d1fae5;color:#047857;font-weight:600}

/* 我的孩子 */
.child-row{display:flex;align-items:center;gap:10px;padding:9px 0;border-bottom:1px solid #f3f5f9}
.child-row:last-child{border-bottom:0}
.child-row .av{width:36px;height:36px;flex:none;border-radius:50%;background:var(--pri-l);color:var(--pri);
  display:flex;align-items:center;justify-content:center;font-weight:700}
.child-row .nm{font-weight:600;font-size:14.5px}
.child-row .sub{font-size:12px;color:var(--mut)}
.child-row .ops{display:flex;gap:6px;flex:none}
.btn-mini.ghost{background:var(--bg);color:var(--mut)}
.btn-add-child{width:100%;margin-top:12px;padding:11px 0;border-radius:11px;font-size:14px;font-weight:600;
  color:var(--pri);background:var(--pri-l);border:1.5px dashed #93c5fd}
/* 创建孩子账号后的一次性凭证展示 */
.kid-created .kc-name{font-size:16px;font-weight:700;margin-bottom:10px}
.kid-created .kc-row{display:flex;justify-content:space-between;align-items:center;
  padding:10px 2px;border-bottom:1px dashed var(--line)}
.kid-created .kc-row span{font-size:13px;color:var(--mut)}
.kid-created .kc-row b{font-size:15px;letter-spacing:.5px}
.btn-primary{
  width:100%;padding:13px 0;margin-top:6px;border-radius:12px;color:#fff;font-size:16px;font-weight:600;
  background:linear-gradient(135deg,#3b82f6,#6366f1);box-shadow:0 6px 16px rgba(59,130,246,.3)
}
.btn-primary:active{transform:scale(.985)}
.auth-tip{text-align:center;color:var(--mut);font-size:12px;margin:12px 0 0}

/* ---------- 顶栏 ---------- */
.appbar{
  display:flex;align-items:center;justify-content:space-between;gap:10px;
  padding:14px 16px;background:#fff;border-bottom:1px solid var(--line);
  position:sticky;top:0;z-index:30
}
.appbar-l{display:flex;align-items:center;gap:10px;min-width:0}
.avatar-mini{
  width:38px;height:38px;border-radius:50%;background:var(--pri-l);color:var(--pri);
  display:flex;align-items:center;justify-content:center;font-size:19px;flex:none
}
.appbar-name{font-weight:600;font-size:15px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.appbar-sub{font-size:11.5px;color:var(--mut)}
.appbar-title{font-weight:600;font-size:16px}
.points-chip{background:#fff7ed;color:#d97706;padding:5px 11px;border-radius:20px;font-size:13px;font-weight:600;flex:none}
.back{font-size:16px;color:var(--pri);padding:4px 6px}
.txt-btn{font-size:13.5px;color:var(--bad)}

.content{flex:1;padding:14px 14px 96px;overflow-y:auto}
.page{display:block}
.muted{color:var(--mut);font-size:12.5px}

/* ---------- 首页三宫格快捷入口 ---------- */
.quick-grid{display:flex;gap:10px;margin-bottom:12px}
.quick-btn{
  flex:1;position:relative;background:#fff;border:1px solid var(--line);border-radius:14px;
  padding:12px 6px 10px;display:flex;flex-direction:column;align-items:center;gap:3px;
  box-shadow:0 2px 8px rgba(15,23,42,.04)
}
.quick-btn:active{transform:scale(.97);background:#f8fafc}
.quick-btn .qi{width:38px;height:38px;border-radius:12px;display:flex;align-items:center;
  justify-content:center;font-size:20px;margin-bottom:2px}
.quick-btn .qt{font-size:13.5px;font-weight:600;color:var(--txt)}
.quick-btn .qs{font-size:10.5px;color:var(--mut);text-align:center;line-height:1.3}
.quick-btn .dot{position:absolute;top:7px;right:9px;width:8px;height:8px;border-radius:50%;
  background:var(--bad);box-shadow:0 0 0 2px #fff}

/* ---------- 搜题 ---------- */
.search-bar{display:flex;gap:8px;margin-bottom:10px}
.search-bar input{flex:1;padding:11px 13px;border:1px solid var(--line);border-radius:11px;
  background:#fbfcfe;outline:none;font-size:14px}
.search-bar input:focus{border-color:var(--pri);background:#fff}
.search-bar button{padding:0 16px;border-radius:11px;background:var(--pri);color:#fff;
  font-size:14px;font-weight:600;flex:none}
.grp-title{font-size:12px;color:var(--mut);margin:10px 2px 6px;font-weight:600}
.q-card{background:#fff;border:1px solid var(--line);border-radius:12px;padding:12px;margin-bottom:9px}
.q-card:active{background:#f8fafc}
.q-top{display:flex;align-items:center;gap:6px;margin-bottom:6px;flex-wrap:wrap}
.q-title{font-size:14.5px;line-height:1.5;color:var(--txt)}
.q-sub{font-size:12px;color:var(--mut);margin-top:5px}
.q-answer{font-size:12.5px;color:var(--ok);margin-top:7px;background:#f0fdf4;
  border-radius:8px;padding:6px 9px}
.q-grade,.q-type{font-size:11px;color:var(--mut);background:var(--bg);padding:2px 8px;border-radius:20px}
.q-detail .qd-meta{font-size:12px;color:var(--mut);margin-bottom:8px}
.q-detail .qd-title{font-size:15px;line-height:1.6;margin-bottom:12px;white-space:pre-wrap}
.q-detail .q-opts{margin-bottom:12px}
.q-detail .q-opts div{font-size:14px;padding:6px 10px;background:var(--bg);
  border-radius:8px;margin-bottom:5px}
.q-detail .qd-sec{margin-top:12px}
.q-detail .qd-sec b{display:block;font-size:12.5px;color:var(--mut);margin-bottom:5px}
.q-detail .qd-ans{font-size:14.5px;line-height:1.7;color:#047857;background:#f0fdf4;
  border-radius:9px;padding:10px;white-space:pre-wrap}
.q-detail .qd-ref{margin-bottom:12px}
.q-detail .qd-ref b{display:block;font-size:12.5px;color:var(--mut);margin-bottom:4px}

/* ---------- 拍照查题 ---------- */
.photo-del{position:absolute;right:3px;top:3px;background:rgba(0,0,0,.5);color:#fff;
  width:20px;height:20px;border-radius:50%;line-height:18px;font-size:13px}
.ask-row{background:#fff;border:1px solid var(--line);border-radius:12px;padding:11px;margin-bottom:9px}
.ask-row:active{background:#f8fafc}
.ask-head{display:flex;justify-content:space-between;align-items:center;margin-bottom:6px}
.q-time{font-size:11.5px;color:var(--mut)}
.ask-note{font-size:14px;line-height:1.5;white-space:pre-wrap}

/* ---------- 选择列表（作业修改） ---------- */
.pick-list{max-height:52vh;overflow-y:auto}
.pick-row{padding:11px 2px;border-bottom:1px solid var(--line);cursor:pointer}
.pick-row:last-child{border-bottom:0}
.pick-row:active{background:var(--bg)}
.pk-title{font-size:14.5px;font-weight:600}
.pk-sub{font-size:12px;color:var(--mut);margin-top:3px}

/* ---------- 筛选 ---------- */
.filter-bar{display:flex;gap:8px;overflow-x:auto;padding-bottom:4px;margin-bottom:12px;-webkit-overflow-scrolling:touch}
.filter-bar::-webkit-scrollbar{display:none}
.chip{flex:none;padding:7px 14px;border-radius:20px;background:#fff;color:var(--mut);font-size:13px;border:1px solid var(--line)}
.chip.active{background:var(--pri);color:#fff;border-color:var(--pri)}

/* ---------- 列表 / 卡片 ---------- */
.list{display:flex;flex-direction:column;gap:11px}
.hw-card{background:#fff;border-radius:var(--r);padding:14px;box-shadow:var(--sh);position:relative;overflow:hidden}
.hw-card::before{content:"";position:absolute;left:0;top:0;bottom:0;width:4px;background:var(--pri)}
.hw-card.st-approved::before{background:var(--ok)}
.hw-card.st-submitted::before{background:var(--warn)}
.hw-card.st-rejected::before{background:var(--bad)}
.hw-top{display:flex;justify-content:space-between;align-items:flex-start;gap:10px}
.hw-title{font-weight:600;font-size:15.5px;line-height:1.35;margin:0 0 4px}
.hw-meta{font-size:12px;color:var(--mut);display:flex;flex-wrap:wrap;gap:8px;margin-top:6px}
.badge{flex:none;font-size:11.5px;padding:3px 9px;border-radius:20px;background:var(--pri-l);color:var(--pri);font-weight:600}
.badge.b-ok{background:#d1fae5;color:#047857}
.badge.b-warn{background:#fef3c7;color:#b45309}
.badge.b-bad{background:#fee2e2;color:#b91c1c}
.badge.b-gray{background:#f1f5f9;color:#64748b}
.subj{background:#eef2ff;color:#4f46e5;padding:2px 8px;border-radius:6px;font-size:11.5px;font-weight:600}

.empty{text-align:center;padding:56px 20px;color:var(--mut)}
.empty .em{font-size:44px;margin-bottom:10px}

/* ---------- FAB ---------- */
.fab{
  position:fixed;right:max(18px,calc(50% - 242px));bottom:82px;z-index:40;
  background:linear-gradient(135deg,#3b82f6,#6366f1);color:#fff;
  padding:12px 20px;border-radius:26px;font-weight:600;font-size:15px;
  box-shadow:0 8px 20px rgba(59,130,246,.4)
}

/* ---------- 统计 ---------- */
.card{background:#fff;border-radius:var(--r);padding:15px;box-shadow:var(--sh);margin-bottom:12px}
.card-title{font-weight:600;font-size:14.5px;margin-bottom:12px}
.ring-row{display:flex;align-items:center;gap:18px}
.ring-wrap{position:relative;width:112px;height:112px;flex:none}
.ring{width:112px;height:112px;transform:rotate(-90deg)}
.ring-bg{fill:none;stroke:#eef2f7;stroke-width:13}
.ring-fg{fill:none;stroke:var(--pri);stroke-width:13;stroke-linecap:round;
  stroke-dasharray:326.7;stroke-dashoffset:326.7;transition:stroke-dashoffset .8s ease}
.ring-text{position:absolute;inset:0;display:flex;flex-direction:column;align-items:center;justify-content:center}
.ring-text b{font-size:23px}
.ring-text span{font-size:11px;color:var(--mut)}
.ring-legend{flex:1;display:flex;flex-direction:column;gap:9px}
.ring-legend div{display:flex;justify-content:space-between;background:#f8fafc;border-radius:9px;padding:8px 12px}
.ring-legend b{font-size:16px}
.ring-legend span{font-size:12.5px;color:var(--mut)}
.bars{display:flex;align-items:flex-end;justify-content:space-between;gap:5px;height:118px}
.bar-col{flex:1;display:flex;flex-direction:column;align-items:center;gap:5px;height:100%;justify-content:flex-end}
.bar{width:100%;max-width:26px;background:linear-gradient(180deg,#60a5fa,#3b82f6);border-radius:5px 5px 0 0;min-height:3px}
.bar-lb{font-size:10px;color:var(--mut);white-space:nowrap}
.focus-box{display:flex;align-items:baseline;gap:5px}
.focus-num{font-size:32px;font-weight:700;color:var(--pri)}
.focus-unit{font-size:13px;color:var(--mut)}
.subj-list{display:flex;flex-direction:column;gap:10px}
.subj-row{display:flex;align-items:center;gap:10px}
.subj-row .nm{width:60px;font-size:13px;flex:none}
.subj-bar{flex:1;height:9px;background:#eef2f7;border-radius:6px;overflow:hidden}
.subj-bar i{display:block;height:100%;background:linear-gradient(90deg,#60a5fa,#6366f1);border-radius:6px}
.subj-row .vl{font-size:12px;color:var(--mut);width:52px;text-align:right;flex:none}

/* ---------- 我的 ---------- */
.me-card{display:flex;align-items:center;gap:13px}
.me-avatar{width:52px;height:52px;border-radius:50%;background:var(--pri-l);color:var(--pri);display:flex;align-items:center;justify-content:center;font-size:26px;flex:none;overflow:hidden}
/* 头像：可点击上传（图片 < 3MB） */
.me-avatar-wrap{position:relative;flex:none;cursor:pointer;-webkit-tap-highlight-color:transparent}
.me-avatar-wrap:active{opacity:.75}
.avatar-cam{
  position:absolute;right:-3px;bottom:-3px;width:21px;height:21px;border-radius:50%;
  background:var(--pri);color:#fff;font-size:11px;line-height:21px;text-align:center;
  border:2px solid #fff;box-shadow:0 1px 3px rgba(0,0,0,.18)
}
.avatar-mini,.me-avatar,.member .av,.child-row .av{overflow:hidden}
.avatar-mini img,.me-avatar img,.member .av img,.child-row .av img{
  width:100%;height:100%;object-fit:cover;display:block;border-radius:50%
}
.me-info{flex:1;min-width:0}
.me-name{font-weight:600;font-size:16px}
.me-points{text-align:center;flex:none}
.me-points b{display:block;font-size:21px;color:#d97706}
.me-points span{font-size:11px;color:var(--mut)}
.family-code{display:flex;align-items:center;gap:10px;background:#f8fafc;border-radius:10px;padding:10px 12px;margin-bottom:10px}
.family-code span{font-size:12.5px;color:var(--mut)}
.family-code b{flex:1;letter-spacing:2px;font-size:17px}
.btn-mini{background:var(--pri);color:#fff;border-radius:8px;padding:5px 11px;font-size:12.5px}
.member-list{display:flex;flex-direction:column;gap:8px}
.member{display:flex;align-items:center;gap:10px;padding:7px 0;border-top:1px solid var(--line)}
.member .av{width:32px;height:32px;border-radius:50%;background:var(--pri-l);display:flex;align-items:center;justify-content:center;font-size:16px}
.member .nm{font-size:14px;font-weight:500}
.member .rl{font-size:11.5px;color:var(--mut)}
.cell{display:flex;justify-content:space-between;align-items:center;padding:12px 2px;border-top:1px solid var(--line);font-size:14.5px}
.cell:first-of-type{border-top:0}
.cell i{color:#cbd5e1;font-style:normal;font-size:19px}
.cell.danger{color:var(--bad)}
.foot{text-align:center;color:#9ca3af;font-size:11.5px;padding:14px 0}

/* ---------- TabBar ---------- */
.tabbar{
  position:fixed;bottom:0;left:0;right:0;max-width:520px;margin:0 auto;
  display:flex;background:#fff;border-top:1px solid var(--line);
  padding-bottom:env(safe-area-inset-bottom);z-index:50
}
.tab{flex:1;padding:12px 0 10px;display:flex;flex-direction:column;align-items:center;gap:4px;color:#9ca3af}
.tab i{font-size:28px;font-style:normal}
.tab span{font-size:14px;font-weight:600}
.tab.active{color:var(--pri)}

/* ---------- 详情 ---------- */
.detail-hd{background:#fff;border-radius:var(--r);padding:16px;box-shadow:var(--sh);margin-bottom:12px}
.detail-hd h2{margin:0 0 8px;font-size:18px}
.detail-line{font-size:13.5px;color:var(--mut);margin-top:5px}
.detail-content{background:#f8fafc;border-radius:10px;padding:12px;margin-top:12px;font-size:14px;white-space:pre-wrap;line-height:1.6}
.timer-box{background:linear-gradient(135deg,#3b82f6,#6366f1);color:#fff;border-radius:var(--r);padding:20px;text-align:center;margin-bottom:12px}
.timer-num{font-size:40px;font-weight:700;letter-spacing:1px;font-variant-numeric:tabular-nums}
.timer-lb{font-size:12.5px;opacity:.9;margin-top:4px}
.timer-btns{display:flex;gap:10px;margin-top:14px}
.timer-btns button{flex:1;padding:10px 0;border-radius:10px;background:rgba(255,255,255,.2);color:#fff;font-weight:600}
.timer-btns button.on{background:#fff;color:var(--pri)}
.photo-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:8px;margin-top:10px}
.photo-grid img{width:100%;aspect-ratio:1;object-fit:cover;border-radius:9px;background:#f1f5f9}
.photo-add{aspect-ratio:1;border:1.5px dashed #cbd5e1;border-radius:9px;display:flex;flex-direction:column;align-items:center;justify-content:center;color:var(--mut);font-size:12px;background:#fbfcfe}
.photo-add span{font-size:22px}
.stars{display:flex;gap:6px;font-size:26px;color:#d1d5db}
.stars b{cursor:pointer;font-weight:400}
.stars b.on{color:#fbbf24}
.review-item{background:#f8fafc;border-radius:10px;padding:12px;margin-bottom:10px}

/* ---------- 弹窗 ---------- */
.modal{display:none;position:fixed;inset:0;z-index:100}
.modal.show{display:block}
.modal-mask{position:absolute;inset:0;background:rgba(15,23,42,.45)}
.modal-box{
  position:absolute;left:0;right:0;bottom:0;max-width:520px;margin:0 auto;
  background:#fff;border-radius:18px 18px 0 0;padding-bottom:env(safe-area-inset-bottom);
  max-height:86vh;display:flex;flex-direction:column;animation:up .22s ease
}
@keyframes up{from{transform:translateY(30px);opacity:.6}to{transform:translateY(0);opacity:1}}
.modal-head{display:flex;justify-content:space-between;align-items:center;padding:15px 17px;border-bottom:1px solid var(--line)}
.modal-head b{font-size:16px}
.modal-body{padding:15px 17px;overflow-y:auto;flex:1}
.modal-foot{padding:12px 17px 16px;display:flex;gap:10px;border-top:1px solid var(--line)}
.modal-foot .btn-primary{margin:0}
.btn-ghost{flex:1;padding:13px 0;border-radius:12px;background:#f1f5f9;color:var(--mut);font-weight:600}
.modal-body .field input,.modal-body .field textarea,.modal-body .field select{
  width:100%;padding:11px 12px;border:1px solid var(--line);border-radius:10px;background:#fbfcfe;outline:none
}
.modal-body textarea{min-height:76px;resize:vertical}
.row2{display:flex;gap:10px}
.row2>*{flex:1}

/* ---------- Toast / Loading ---------- */
.toast{
  position:fixed;left:50%;bottom:120px;transform:translateX(-50%) translateY(12px);
  background:rgba(17,24,39,.9);color:#fff;padding:10px 18px;border-radius:22px;font-size:13.5px;
  opacity:0;pointer-events:none;transition:.22s;z-index:200;max-width:80%;text-align:center
}
.toast.show{opacity:1;transform:translateX(-50%) translateY(0)}
.loading{display:none;position:fixed;inset:0;background:rgba(255,255,255,.5);z-index:300;align-items:center;justify-content:center}
.loading.show{display:flex}
.spinner{width:34px;height:34px;border:3px solid var(--pri-l);border-top-color:var(--pri);border-radius:50%;animation:spin .8s linear infinite}
@keyframes spin{to{transform:rotate(360deg)}}