/* 学伴 · 孩子端与管理端样式（移动优先） */

:root{
  --bg:#F7F8FB; --card:#FFFFFF; --text:#1B1F26; --text-2:#6B7280; --text-3:#9AA1AC;
  --line:#E7E9EF; --line-2:#EFF1F5;
  --ok:#16A34A; --warn:#F59E0B; --danger:#DC2626; --info:#2563EB;
  --theme:#2563EB;
  --r-card:20px; --r-btn:16px; --r-chip:10px;
  --fs:17px;
  --safe-t:env(safe-area-inset-top,0px);
  --safe-b:env(safe-area-inset-bottom,0px);
  --tab-h:60px;
  --shadow:0 1px 3px rgba(16,24,40,.06);
}

*{box-sizing:border-box;-webkit-tap-highlight-color:transparent}
html,body{margin:0;padding:0}
body{
  background:var(--bg); color:var(--text);
  font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Helvetica Neue","Microsoft YaHei",sans-serif;
  font-size:var(--fs); line-height:1.5; -webkit-font-smoothing:antialiased;
}
body[data-grade="2"]{--fs:18px}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit}
input,select,textarea{font-size:16px;font-family:inherit}

.app{min-height:100dvh;min-height:-webkit-fill-available;display:flex;flex-direction:column}
.page{flex:1;padding:12px 16px calc(var(--tab-h) + var(--safe-b) + 24px)}

/* ---------- 顶部条 ---------- */
.topbar{
  position:sticky;top:0;z-index:30;display:flex;align-items:center;justify-content:space-between;
  gap:8px;padding:calc(var(--safe-t) + 10px) 16px 10px;
  background:rgba(247,248,251,.92);backdrop-filter:saturate(160%) blur(8px);
  border-bottom:1px solid var(--line-2);
}
.topbar__who{display:flex;align-items:center;gap:8px;min-width:0}
.topbar__name{font-weight:600;white-space:nowrap}
.topbar__title{font-size:13px;color:var(--text-2);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.avatar{
  display:inline-flex;align-items:center;justify-content:center;color:#fff;font-weight:600;
  border-radius:50%;flex:0 0 auto;
}
.avatar--sm{width:34px;height:34px;font-size:15px}
.avatar--lg{width:64px;height:64px;font-size:26px}
.lv-chip{
  font-size:12px;font-weight:600;padding:2px 7px;border-radius:999px;flex:0 0 auto;
  background:#EEF2FF;color:#3B4A9C;border:1px solid #DDE3FF;
}
.lv-chip[data-mat="silver"]{background:#F2F4F7;color:#4B5563;border-color:#E3E6EB}
.lv-chip[data-mat="gold"]{background:#FFF7E6;color:#92600A;border-color:#FBE0AE}
.lv-chip[data-mat="diamond"]{background:#E9F7FE;color:#0E7490;border-color:#C7EDF9}
.lv-chip[data-mat="starlight"]{background:#F3EDFF;color:#6B3FA0;border-color:#E2D4FA}
.icon-btn{
  width:44px;height:44px;display:inline-flex;align-items:center;justify-content:center;
  background:transparent;border:0;border-radius:12px;color:var(--text-2);cursor:pointer;
}
.icon-btn:active{background:#EDEFF4}

/* ---------- 底部 tab ---------- */
.tabbar{
  position:fixed;left:0;right:0;bottom:0;z-index:40;display:flex;
  height:calc(var(--tab-h) + var(--safe-b));padding-bottom:var(--safe-b);
  background:rgba(255,255,255,.96);backdrop-filter:blur(10px);border-top:1px solid var(--line);
}
.tabbar__item{
  flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:2px;
  color:var(--text-3);font-size:10.5px;padding:6px 2px 0;min-width:0;white-space:nowrap;
}
.tabbar__item.is-on{color:var(--theme)}
.tabbar__item:active{background:#F5F6FA}

/* ---------- 卡片 ---------- */
.card{background:var(--card);border-radius:var(--r-card);padding:16px;box-shadow:var(--shadow);margin-bottom:12px}
.card--flat{box-shadow:none;border:1px solid var(--line)}
.sec-title{font-size:14px;font-weight:600;color:var(--text-2);margin:18px 4px 8px;display:flex;align-items:center;justify-content:space-between}
.sec-title:first-child{margin-top:4px}
.muted{color:var(--text-2);font-size:14px}
.tiny{font-size:12px;color:var(--text-3)}
.row{display:flex;align-items:center;gap:10px}
.row--between{justify-content:space-between}
.grow{flex:1;min-width:0}
.ellip{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:6px;
  min-height:50px;padding:0 20px;border-radius:var(--r-btn);border:1px solid transparent;
  background:#EDEFF4;color:var(--text);font-weight:600;cursor:pointer;
  -webkit-appearance:none;appearance:none;transition:transform .08s ease;
}
.btn:active{transform:scale(.985)}
.btn:disabled{opacity:.5}
.btn--primary{background:var(--theme);color:#fff}
.btn--ok{background:var(--ok);color:#fff}
.btn--ghost{background:#fff;border-color:var(--line);color:var(--text)}
.btn--danger{background:#FEF2F2;color:var(--danger);border-color:#FBD5D5}
.btn--block{display:flex;width:100%}
.btn--lg{min-height:56px;font-size:18px;border-radius:18px}
.btn--sm{min-height:38px;padding:0 14px;font-size:14px;border-radius:10px}

/* ---------- 表单 ---------- */
.field{margin-bottom:14px}
.field__l{display:block;font-size:14px;color:var(--text-2);margin-bottom:6px}
.req{color:var(--danger);margin-left:2px}
.input,.select,.textarea{
  width:100%;min-height:50px;padding:12px 14px;border-radius:14px;border:1px solid var(--line);
  background:#fff;color:var(--text);-webkit-appearance:none;appearance:none;outline:none;
}
.input:focus,.select:focus,.textarea:focus{border-color:var(--theme);box-shadow:0 0 0 3px rgba(37,99,235,.12)}
.textarea{min-height:120px;resize:vertical;line-height:1.6}
.select{background-image:url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%236B7280' stroke-width='2'><path d='M6 9l6 6 6-6'/></svg>");background-repeat:no-repeat;background-position:right 14px center;padding-right:40px}
.hint{font-size:12px;color:var(--text-3);margin-top:6px}

/* 胶囊单选 */
.chips{display:flex;flex-wrap:wrap;gap:8px}
.chip{
  min-height:44px;padding:0 16px;display:inline-flex;align-items:center;justify-content:center;
  border-radius:12px;border:1px solid var(--line);background:#fff;font-size:15px;cursor:pointer;
}
.chip.is-on{border-color:var(--theme);background:var(--theme);color:#fff;font-weight:600}

/* ---------- 进度环 ---------- */
.ring-wrap{display:flex;align-items:center;justify-content:center;padding:8px 0 4px}
.ring{
  width:170px;height:170px;border-radius:50%;position:relative;
  background:conic-gradient(var(--theme) calc(var(--p,0) * 1%), #E9ECF2 0);
  display:flex;align-items:center;justify-content:center;
}
.ring::after{content:"";position:absolute;inset:14px;background:var(--card);border-radius:50%}
.ring__in{position:relative;z-index:1;text-align:center}
.ring__n{font-size:40px;font-weight:700;line-height:1.1}
.ring__t{font-size:13px;color:var(--text-2)}

/* ---------- 待办行 ---------- */
.todo-row{
  display:flex;align-items:center;gap:12px;padding:14px 4px;border-bottom:1px solid var(--line-2);
}
.todo-row:last-child{border-bottom:0}
.todo-row__dot{width:8px;height:8px;border-radius:50%;background:var(--text-3);flex:0 0 auto}
.todo-row--hot .todo-row__dot{background:var(--danger)}
.todo-row__n{margin-left:auto;font-weight:600;color:var(--text-2);font-size:14px}
.todo-row__arrow{color:var(--text-3)}

/* ---------- 复习卡 ---------- */
.review-head{display:flex;align-items:center;justify-content:space-between;margin:2px 4px 10px}
.progress-line{height:4px;border-radius:2px;background:#E9ECF2;overflow:hidden;margin:0 4px 14px}
.progress-line i{display:block;height:100%;background:var(--theme);border-radius:2px;transition:width .25s}
.review-card{
  background:var(--card);border-radius:22px;padding:22px 20px;box-shadow:var(--shadow);
  min-height:300px;display:flex;flex-direction:column;
}
.review-card__meta{display:flex;align-items:center;justify-content:space-between;font-size:13px;color:var(--text-2);margin-bottom:16px}
.review-card__front{font-size:21px;line-height:1.75;flex:1;word-break:break-word;white-space:normal}
body[data-grade="2"] .review-card__front{font-size:23px}
.review-card__back{
  margin-top:16px;padding-top:16px;border-top:1px dashed var(--line);
  font-size:19px;line-height:1.7;color:var(--ok);white-space:pre-wrap;
}
.review-card__back[hidden]{display:none}
.reveal-btn{
  width:100%;min-height:56px;border-radius:16px;border:1px dashed #C7D2FE;
  background:#F5F7FF;color:#3B4A9C;font-weight:600;font-size:16px;
  display:flex;align-items:center;justify-content:center;gap:8px;
}
.cloze-blank{
  display:inline-block;min-width:5.2em;border-bottom:2px solid var(--theme);
  color:transparent;text-align:center;margin:0 2px;vertical-align:baseline;
}
.cloze-blank.is-on{color:var(--ok);border-bottom-color:var(--ok);text-align:left;min-width:auto}

.rating{display:grid;grid-template-columns:repeat(4,1fr);gap:8px;margin-top:16px}
.rate-btn{
  border-radius:14px;border:1px solid var(--line);background:#fff;padding:10px 2px 8px;
  display:flex;flex-direction:column;align-items:center;gap:2px;font-size:16px;font-weight:600;cursor:pointer;
}
.rate-btn small{font-size:10px;font-weight:400;color:var(--text-3);line-height:1.2;text-align:center}
.rate-btn[data-r="fail"]{color:#B42318;border-color:#FBD5D5;background:#FFF7F7}
.rate-btn[data-r="fuzzy"]{color:#92600A;border-color:#FBE0AE;background:#FFFBF2}
.rate-btn[data-r="ok"]{color:#0F6E56;border-color:#C6EBDD;background:#F4FCF8}
.rate-btn[data-r="fluent"]{color:#3B4A9C;border-color:#C7D2FE;background:#F5F7FF}
.rating[data-locked="1"] .rate-btn{opacity:.42;pointer-events:none}

/* ---------- 任务 ---------- */
.seg-title{font-size:13px;font-weight:600;color:var(--text-2);margin:16px 4px 8px}
.task-row{display:flex;align-items:center;gap:12px;padding:13px 4px;border-bottom:1px solid var(--line-2)}
.task-row:last-child{border-bottom:0}
.task-check{
  width:28px;height:28px;border-radius:50%;border:2px solid #CBD2DD;flex:0 0 auto;
  display:flex;align-items:center;justify-content:center;background:#fff;cursor:pointer;
  transition:transform .12s ease;
}
.task-check svg{opacity:0;transform:scale(.5);transition:opacity .15s,transform .15s}
.task-row.is-done .task-check{background:var(--ok);border-color:var(--ok)}
.task-row.is-done .task-check svg{opacity:1;transform:scale(1)}
.task-row.is-done .task-row__t{color:var(--text-3);text-decoration:line-through}

/* ---------- 列表 ---------- */
.list-item{display:flex;align-items:center;gap:12px;padding:14px 4px;border-bottom:1px solid var(--line-2)}
.list-item:last-child{border-bottom:0}
.tag{display:inline-flex;align-items:center;height:22px;padding:0 8px;border-radius:6px;font-size:12px;font-weight:600}
.tag--cn{background:#FDEDEC;color:#B03A36}
.tag--ma{background:#E8F0FE;color:#1D4ED8}
.tag--en{background:#E3F7EF;color:#0B7A55}
.tag--gray{background:#F1F3F7;color:#5A6472}
.tag--ok{background:#E8F7EE;color:#15803D}
.tag--warn{background:#FFF7E6;color:#92600A}

/* ---------- 徽章墙 ---------- */
.badge-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:12px}
.badge{
  background:var(--card);border-radius:16px;padding:16px 12px;text-align:center;border:1px solid var(--line);
}
.badge.is-locked{background:#FAFBFC;border-style:dashed}
.badge.is-locked .badge__n,.badge.is-locked .badge__d{color:var(--text-3)}
.badge.is-locked .medal{filter:grayscale(1);opacity:.4}
.badge__n{font-weight:600;margin-top:8px}
.badge__d{font-size:12px;color:var(--text-2);margin-top:4px;line-height:1.45}
.badge__lv{font-size:11px;color:var(--text-3);margin-top:6px}

/* ---------- 弹层 ---------- */
.sheet{position:fixed;inset:0;z-index:60;display:flex;align-items:flex-end}
.sheet[hidden]{display:none}
.sheet__mask{position:absolute;inset:0;background:rgba(15,23,42,.42)}
.sheet__body{
  position:relative;width:100%;background:#fff;border-radius:24px 24px 0 0;
  padding:20px 16px calc(20px + var(--safe-b));animation:sheetUp .22s ease;
}
@keyframes sheetUp{from{transform:translateY(24px);opacity:.5}to{transform:none;opacity:1}}
.sheet__title{font-size:17px;margin:0 0 16px;text-align:center}
.kid-pick{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin-bottom:16px}
.kid-card{
  border:1px solid var(--line);border-radius:16px;padding:16px 8px;text-align:center;background:#fff;cursor:pointer;
}
.kid-card__n{font-weight:600;margin-top:8px}
.kid-card__g{font-size:12px;color:var(--text-2)}
.pinpad{margin-top:8px}
.pin-dots{display:flex;justify-content:center;gap:12px;margin:6px 0 16px}
.pin-dots i{width:12px;height:12px;border-radius:50%;background:#E2E6ED}
.pin-dots i.is-on{background:var(--theme)}
.pin-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:10px}
.pin-key{
  height:60px;border-radius:14px;border:1px solid var(--line);background:#fff;font-size:22px;font-weight:600;
  display:flex;align-items:center;justify-content:center;cursor:pointer;
}
.pin-key:active{background:#F1F3F7}

/* ---------- 提示 / 动效 ---------- */
.toast{
  position:fixed;left:50%;top:calc(var(--safe-t) + 16px);transform:translateX(-50%);
  background:rgba(27,31,38,.92);color:#fff;padding:10px 16px;border-radius:12px;font-size:14px;
  z-index:80;max-width:86vw;text-align:center;
}
.toast[hidden]{display:none}
.xpfx{position:fixed;inset:0;pointer-events:none;z-index:70}
.xp-pop{
  position:absolute;font-weight:700;color:var(--ok);font-size:20px;
  animation:xpFloat 1s ease-out forwards;text-shadow:0 1px 2px rgba(255,255,255,.9);
}
@keyframes xpFloat{0%{opacity:0;transform:translateY(6px) scale(.9)}20%{opacity:1;transform:translateY(-6px) scale(1.05)}100%{opacity:0;transform:translateY(-46px) scale(1)}}

.levelup{
  position:fixed;inset:0;z-index:90;display:flex;align-items:center;justify-content:center;
  background:rgba(15,23,42,.62);backdrop-filter:blur(4px);
}
.levelup[hidden]{display:none}
.levelup__inner{position:relative;text-align:center;color:#fff;padding:24px}
.levelup__ring{
  position:absolute;left:50%;top:52px;width:150px;height:150px;margin-left:-75px;border-radius:50%;
  border:2px solid rgba(255,255,255,.75);animation:ringOut 1.1s ease-out infinite;
}
@keyframes ringOut{0%{transform:scale(.4);opacity:.9}100%{transform:scale(1.9);opacity:0}}
.levelup__lv{font-size:70px;font-weight:700;line-height:1;animation:popIn .5s cubic-bezier(.2,1.3,.5,1)}
@keyframes popIn{from{transform:scale(.4);opacity:0}to{transform:scale(1);opacity:1}}
.levelup__title{font-size:30px;font-weight:700;margin-top:12px;letter-spacing:2px}
.levelup__desc{font-size:14px;opacity:.86;margin:10px 0 26px;padding:0 20px;line-height:1.6}

/* 勾选扩散 */
@keyframes checkPop{0%{transform:scale(.6);opacity:0}60%{transform:scale(1.15)}100%{transform:scale(1);opacity:1}}
.task-row.is-done .task-check svg{animation:checkPop .24s ease}

/* ---------- 空状态 ---------- */
.empty{text-align:center;padding:44px 20px;color:var(--text-2)}
.empty__ico{font-size:34px;margin-bottom:10px;opacity:.5}
.empty__t{font-size:16px;color:var(--text);font-weight:600;margin-bottom:6px}

/* ---------- 登录 / 初始化 ---------- */
.page-blank{background:linear-gradient(180deg,#F4F7FF 0%,#F7F8FB 46%)}
.blank-wrap{min-height:100dvh;padding:calc(var(--safe-t) + 28px) 20px calc(var(--safe-b) + 28px);max-width:460px;margin:0 auto}
.brand{text-align:center;margin-bottom:26px}
.brand__logo{width:64px;height:64px;margin:0 auto 12px;border-radius:20px;background:linear-gradient(140deg,#4F7CFF,#2563EB);
  display:flex;align-items:center;justify-content:center;color:#fff;font-size:30px;font-weight:700;box-shadow:0 8px 20px rgba(37,99,235,.25)}
.brand__t{font-size:24px;font-weight:700;letter-spacing:3px}
.brand__s{font-size:13px;color:var(--text-2);margin-top:4px}
.kid-login{display:grid;grid-template-columns:1fr 1fr;gap:14px;margin-bottom:18px}
.kid-login__card{
  background:#fff;border-radius:22px;padding:22px 10px;text-align:center;box-shadow:var(--shadow);
  border:1px solid var(--line);cursor:pointer;
}
.kid-login__card:active{transform:scale(.985)}
.kid-login__n{font-weight:700;font-size:17px;margin-top:12px}
.kid-login__g{font-size:12px;color:var(--text-2);margin-top:2px}
.link-btn{display:block;width:100%;text-align:center;background:none;border:0;color:var(--text-2);padding:14px;font-size:14px}

/* ---------- 家长端 ---------- */
.page-parent .sec-title{font-size:13px}
.p-card{background:#fff;border-radius:16px;padding:14px;border:1px solid var(--line);margin-bottom:10px}
.p-kid{display:flex;align-items:center;gap:10px}
.p-kid__bar{height:6px;border-radius:3px;background:#EDF0F5;overflow:hidden;margin-top:10px}
.p-kid__bar i{display:block;height:100%;background:var(--ok)}
.alert{border-radius:14px;padding:12px 14px;font-size:14px;margin-bottom:10px}
.alert--warn{background:#FFF7E6;color:#8A5A00;border:1px solid #FBE0AE}
.alert--info{background:#EFF5FF;color:#27408B;border:1px solid #D5E2FB}
.table{width:100%;border-collapse:collapse;font-size:14px}
.table th,.table td{padding:9px 6px;border-bottom:1px solid var(--line-2);text-align:left}
.table th{color:var(--text-2);font-weight:600;font-size:13px}

/* ---------- 点击反馈（手机上没有 hover，按下必须有可见变化） ---------- */
.btn:active{transform:scale(.97);opacity:.92}
.btn--primary:active{background:#1D4ED8}
.btn--ghost:active{background:#F1F3F7}
.btn--ok:active{background:#128040}
.btn--danger:active{background:#FDE4E4}
.chip:active{background:#EDF0F5}
.chip.is-on:active{opacity:.85}
.todo-row:active,.list-item:active{background:#F3F5F9;border-radius:10px}
.kid-login__card:active,.kid-card:active{transform:scale(.97)}
.rate-btn:active{transform:scale(.95)}
.reveal-btn:active{background:#E8EDFF}
.task-check:active{transform:scale(.88)}
.p-card:active{transform:scale(.99);background:#FAFBFD}
.sheet__body .btn:active{opacity:.85}
.topbar__who:active,.icon-btn:active{opacity:.6}
.tabbar__item:active{opacity:.6}

@media (prefers-reduced-motion: reduce){
  *{animation:none !important;transition:none !important}
}

@media (min-width:768px){
  .page{max-width:760px;margin:0 auto;width:100%;padding-bottom:32px}
  .tabbar{position:sticky;max-width:760px;margin:0 auto;border-radius:0}
  .review-card{min-height:360px}
}