/* ==========================================================
   小步 · 拍照识题引导  —  样式
   ========================================================== */

:root{
  --bg:#f4f6fb;
  --bg-2:#eef1f9;
  --card:#ffffff;
  --ink:#1b2033;
  --ink-2:#59637a;
  --ink-3:#98a1b4;
  --line:#e9edf6;
  --line-2:#dde4f1;
  --brand:#4f6ef7;
  --brand-d:#3b54d8;
  --brand-soft:#eef1ff;
  --brand-soft-2:#e3e9ff;
  --ok:#12b886;
  --ok-soft:#e6f8f1;
  --warn:#ff8a3d;
  --warn-soft:#fff2e7;
  --danger:#ef4d5a;
  --r-lg:22px;
  --r:16px;
  --r-sm:11px;
  --sh:0 2px 6px rgba(27,38,72,.04), 0 10px 26px rgba(27,38,72,.055);
  --sh-lg:0 18px 48px rgba(27,38,72,.13);
  --font:-apple-system,BlinkMacSystemFont,"PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,sans-serif;
}

*{box-sizing:border-box;-webkit-tap-highlight-color:transparent}
html,body{margin:0;padding:0}
[hidden]{display:none!important}
body{
  font-family:var(--font);
  background:var(--bg);
  color:var(--ink);
  font-size:15px;
  line-height:1.65;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
button{font-family:inherit;cursor:pointer;border:none;background:none;color:inherit}
input,textarea{font-family:inherit;font-size:inherit;color:inherit}
h1,h2,h3,p,ul{margin:0;padding:0}
ul{list-style:none}
.sprite{display:none}

.ico{width:20px;height:20px;fill:none;stroke:currentColor;stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round;flex:none;display:block}
.ico.sm{width:16px;height:16px}
.ico.xs{width:13px;height:13px;stroke-width:2}

/* ---------- 布局 ---------- */
.shell{max-width:600px;margin:0 auto;padding:0 18px 48px}
.shell.wide{max-width:1000px;padding-bottom:60px}
.view{display:none;animation:fade .28s ease both}
.view.active{display:block}
@keyframes fade{from{opacity:0;transform:translateY(6px)}to{opacity:1;transform:none}}

/* ---------- 首页 hero ---------- */
.hero{position:relative;padding:22px 0 20px}
.hero-top{display:flex;align-items:flex-start;justify-content:space-between;gap:12px}
.brand{display:flex;flex-direction:column;gap:2px}
.brand-mark{font-size:19px;font-weight:800;letter-spacing:.06em;color:var(--brand-d)}
.brand-sub{font-size:11.5px;color:var(--ink-3);letter-spacing:.02em}
.hero-title{font-size:26px;font-weight:800;letter-spacing:-.01em;margin:16px 0 12px;line-height:1.35}
.hero-stats{display:flex;gap:8px;flex-wrap:wrap}
.pill{
  display:inline-flex;align-items:center;gap:5px;
  font-size:12.5px;font-weight:600;color:var(--brand-d);
  background:var(--brand-soft);padding:5px 12px;border-radius:999px;
}
.pill.ghost{background:#fff;color:var(--ink-3);border:1px solid var(--line-2);font-weight:500}
.icon-btn{
  width:38px;height:38px;border-radius:12px;display:grid;place-items:center;
  color:var(--ink-2);background:#fff;border:1px solid var(--line);flex:none;
  transition:.18s;
}
.icon-btn:active{transform:scale(.94);background:var(--bg-2)}

/* ---------- 上传卡 ---------- */
.upload-card{
  position:relative;overflow:hidden;background:var(--card);
  border-radius:var(--r-lg);padding:34px 22px 28px;text-align:center;
  box-shadow:var(--sh);border:1px solid #fff;
}
.upload-glow{
  position:absolute;inset:-40% -20% auto -20%;height:260px;
  background:radial-gradient(60% 60% at 50% 0%,rgba(79,110,247,.16),transparent 70%);
  pointer-events:none;
}
.upload-icon{
  position:relative;width:62px;height:62px;margin:0 auto 14px;border-radius:20px;
  background:linear-gradient(150deg,var(--brand),#7b8dff);
  color:#fff;display:grid;place-items:center;
  box-shadow:0 12px 26px rgba(79,110,247,.32);
}
.upload-icon .ico{width:28px;height:28px;stroke-width:1.6}
.upload-title{position:relative;font-size:19px;font-weight:750;letter-spacing:.01em}
.upload-desc{position:relative;font-size:13px;color:var(--ink-3);margin-top:6px;line-height:1.7}
.upload-actions{position:relative;display:flex;gap:9px;justify-content:center;margin-top:20px}
.upload-actions .btn{flex:1;min-width:0;padding:0 8px;font-size:14.5px;gap:5px}
.upload-actions .btn .ico{opacity:.9}
.upload-kbd{
  position:relative;margin-top:15px;display:flex;align-items:center;justify-content:center;
  gap:4px;flex-wrap:wrap;font-size:11.5px;color:var(--ink-3);line-height:1.6;
}
.upload-kbd i{font-style:normal;opacity:.55}
kbd{
  font-family:inherit;font-size:10.5px;font-weight:650;color:var(--ink-2);
  background:var(--bg-2);border:1px solid var(--line-2);border-bottom-width:2px;
  border-radius:5px;padding:1px 5px;display:inline-block;line-height:1.4;
}
.paste-hint{
  display:flex;align-items:center;justify-content:center;gap:4px;flex-wrap:wrap;
  margin:-4px 0 0;font-size:11.5px;color:var(--ink-3);text-align:center;line-height:1.6;
}
.paste-hint i{font-style:normal;opacity:.55}

/* ---------- 摄像头取景 ---------- */
.hero-tools{display:flex;gap:8px;flex:none}
.camera-card{
  position:relative;width:min(560px,94vw);background:#12161f;border-radius:20px;overflow:hidden;
  box-shadow:0 24px 60px rgba(8,14,30,.4);animation:pop .2s ease both;
}
.camera-head{display:flex;align-items:center;justify-content:space-between;padding:12px 14px;color:#e8ecf6}
.camera-title{font-size:14px;font-weight:650}
.camera-head .icon-btn{background:rgba(255,255,255,.12);border-color:transparent;color:#e8ecf6;width:34px;height:34px}
.camera-stage{position:relative;background:#000;aspect-ratio:4/3;overflow:hidden}
.camera-stage video{width:100%;height:100%;object-fit:cover;display:block}
.camera-frame{
  position:absolute;inset:8% 6%;border:2px solid rgba(255,255,255,.75);border-radius:12px;
  box-shadow:0 0 0 999px rgba(6,10,20,.28);pointer-events:none;
}
.camera-tip{
  position:absolute;left:50%;bottom:12px;transform:translateX(-50%);
  padding:4px 12px;border-radius:999px;background:rgba(8,12,22,.5);backdrop-filter:blur(4px);
  font-size:11.5px;color:rgba(255,255,255,.92);white-space:nowrap;
}
.camera-foot{display:flex;gap:10px;align-items:center;padding:12px 14px 6px}
.camera-foot .btn-ghost{background:rgba(255,255,255,.12);border-color:transparent;color:#e8ecf6}
.camera-note{padding:2px 14px 14px;font-size:11.5px;color:rgba(255,255,255,.55);text-align:center}
.camera-note .link-btn{color:#9db2ff}

/* ---------- 说明弹窗 ---------- */
.help-step{display:flex;gap:10px;align-items:flex-start;font-size:13px;line-height:1.75;color:var(--ink);margin-bottom:14px}
.help-no{
  flex:none;width:20px;height:20px;margin-top:2px;border-radius:50%;background:var(--brand-soft);
  color:var(--brand-d);font-size:11.5px;font-weight:750;display:grid;place-items:center;
}
.help-step b{font-weight:700}
.help-sub{color:var(--ink-3);font-size:12.5px}
.help-step kbd{font-size:10px}

/* ---------- 拖拽投放层 ---------- */
.dropzone{
  position:fixed;inset:0;z-index:95;display:none;place-items:center;
  background:rgba(79,110,247,.12);backdrop-filter:blur(3px);
}
.dropzone.show{display:grid}
.dropzone-inner{
  background:#fff;border:2px dashed var(--brand);border-radius:24px;padding:30px 42px;
  text-align:center;box-shadow:var(--sh-lg);animation:pop .2s ease both;max-width:86vw;
}
.dropzone-icon{
  width:56px;height:56px;margin:0 auto 12px;border-radius:18px;display:grid;place-items:center;
  background:var(--brand-soft);color:var(--brand-d);
}
.dropzone-icon .ico{width:26px;height:26px}
.dropzone-title{font-size:17px;font-weight:750}
.dropzone-sub{font-size:12.5px;color:var(--ink-3);margin-top:6px}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:7px;
  height:46px;padding:0 22px;border-radius:14px;font-size:15px;font-weight:650;
  transition:transform .16s,background .16s,box-shadow .16s;
  white-space:nowrap;
}
.btn:active{transform:scale(.97)}
.btn-primary{background:var(--brand);color:#fff;box-shadow:0 8px 20px rgba(79,110,247,.28)}
.btn-primary:active{background:var(--brand-d)}
.btn-primary[disabled]{opacity:.55;box-shadow:none}
.btn-soft{background:var(--brand-soft);color:var(--brand-d)}
.btn-ghost{background:#fff;color:var(--ink-2);border:1px solid var(--line-2)}
.btn-tiny{height:34px;padding:0 14px;font-size:13px;border-radius:11px;background:var(--brand-soft);color:var(--brand-d)}
.btn-block{width:100%;margin-top:12px}
.btn.grow{flex:1}
.btn.sm{height:38px;padding:0 14px;font-size:13px;border-radius:11px}
.btn.danger{color:var(--danger);border-color:#f6d7da}

.tip-strip{
  display:flex;align-items:center;gap:8px;margin-top:14px;padding:11px 14px;
  background:var(--brand-soft);border-radius:var(--r);color:var(--brand-d);
  font-size:12.5px;font-weight:550;
}

/* ---------- 区块标题 ---------- */
.section-head{display:flex;align-items:center;justify-content:space-between;margin:28px 0 12px}
.section-head h2{font-size:15px;font-weight:750;color:var(--ink)}
.link-btn{display:inline-flex;align-items:center;gap:3px;font-size:12.5px;color:var(--ink-3);font-weight:550}

/* ---------- 最近记录 ---------- */
.recent-list{display:flex;flex-direction:column;gap:9px}
.rec-item{
  display:flex;align-items:center;gap:12px;background:#fff;border-radius:var(--r);
  padding:13px 15px;box-shadow:0 1px 3px rgba(27,38,72,.04);border:1px solid var(--line);
  transition:.16s;text-align:left;width:100%;
}
.rec-item:active{transform:scale(.99);background:#fcfdff}
.rec-dot{width:9px;height:9px;border-radius:50%;flex:none;background:var(--brand)}
.rec-main{flex:1;min-width:0;overflow:hidden}
.rec-title{display:block;font-size:13.5px;color:var(--ink);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.rec-sub{display:flex;font-size:11.5px;color:var(--ink-3);margin-top:2px;gap:7px;align-items:center;white-space:nowrap;overflow:hidden}
.rec-arrow{color:var(--ink-3);flex:none}
.empty{
  text-align:center;color:var(--ink-3);font-size:13px;padding:34px 20px;
  background:#fff;border-radius:var(--r);border:1px dashed var(--line-2);
}

/* ---------- 学科色 ---------- */
[data-s="math"]{--sc:#4f6ef7;--ssoft:#eef1ff}
[data-s="physics"]{--sc:#7c5cff;--ssoft:#f1ecff}
[data-s="chemistry"]{--sc:#12b0a0;--ssoft:#e6f8f5}
[data-s="english"]{--sc:#ff7a59;--ssoft:#fff0eb}
[data-s="other"]{--sc:#6b7789;--ssoft:#f0f3f8}

/* ---------- 页内返回栏 ---------- */
.pagebar{display:flex;align-items:center;justify-content:space-between;padding:16px 0 8px;gap:10px}
.pagebar-title{font-size:15.5px;font-weight:750}
.pagebar-pad{width:38px;flex:none}

.lead{font-size:13.5px;color:var(--ink-2);line-height:1.7}
.lead.center{text-align:center}
.muted{color:var(--ink-3);font-size:12.5px}

/* ---------- 确认页 ---------- */
.thumb-wrap{
  position:relative;margin:14px 0 12px;border-radius:var(--r);overflow:hidden;
  background:#f7f9fd;border:1px solid var(--line);box-shadow:var(--sh);
}
/* 整张图都露出来，确认时不会因为裁切看不到关键信息 */
.thumb-wrap img{width:100%;height:auto;max-height:320px;object-fit:contain;display:block}
.conf-badge{
  position:absolute;right:10px;bottom:10px;background:rgba(27,32,51,.78);color:#fff;
  font-size:11.5px;font-weight:600;padding:4px 10px;border-radius:999px;backdrop-filter:blur(6px);
}
.card{
  background:var(--card);border-radius:var(--r);padding:15px 16px;margin-top:12px;
  box-shadow:0 1px 3px rgba(27,38,72,.04);border:1px solid var(--line);
}
.card.soft{background:var(--brand-soft);border-color:var(--brand-soft-2)}
.card-label{
  font-size:12px;font-weight:700;color:var(--ink-3);letter-spacing:.04em;
  margin-bottom:10px;display:flex;align-items:center;gap:8px;
}
.card-hint{font-weight:500;color:var(--ink-3);font-size:11px;letter-spacing:0;margin-left:auto}
.chips{display:flex;flex-wrap:wrap;gap:8px}
.chip{
  height:34px;padding:0 16px;border-radius:999px;background:var(--bg-2);
  font-size:13px;font-weight:600;color:var(--ink-2);transition:.16s;border:1px solid transparent;
}
#cSubjects{flex-wrap:nowrap;gap:6px}
#cSubjects .chip{flex:1 1 0;padding:0 4px;font-size:12.5px}
.chip.active{background:var(--brand);color:#fff;box-shadow:0 6px 16px rgba(79,110,247,.24)}
.chip:active{transform:scale(.96)}
.ta{
  width:100%;border:none;resize:vertical;font-size:14.5px;line-height:1.75;
  color:var(--ink);background:transparent;outline:none;min-height:96px;
}
.ta::placeholder{color:var(--ink-3)}
.mini-list{display:flex;flex-direction:column;gap:7px}
.mini-list li{
  position:relative;padding-left:16px;font-size:13px;color:var(--ink-2);line-height:1.65;
}
.mini-list li::before{
  content:"";position:absolute;left:2px;top:9px;width:5px;height:5px;
  border-radius:50%;background:var(--brand);opacity:.65;
}
.mini-goal{
  margin-top:10px;padding:10px 12px;background:var(--brand-soft);border-radius:var(--r-sm);
  font-size:13px;color:var(--brand-d);font-weight:550;line-height:1.6;
}
.mini-goal:empty{display:none}
.mini-figure{font-size:12.5px;color:var(--ink-3);margin-top:8px;line-height:1.6}
.mini-figure:empty{display:none}
.sticky-actions{
  position:sticky;bottom:0;display:flex;gap:10px;padding:14px 0 6px;margin-top:8px;
  background:linear-gradient(to top,var(--bg) 62%,rgba(244,246,251,0));
}

/* ---------- 完成页 ---------- */
.done-hero{text-align:center;padding:34px 0 24px}
.done-ring{
  width:66px;height:66px;margin:0 auto 16px;border-radius:50%;
  background:var(--ok-soft);color:var(--ok);display:grid;place-items:center;
  box-shadow:0 10px 26px rgba(18,184,134,.18);
}
.done-ring .ico{width:30px;height:30px;stroke-width:2.2}
.done-hero h2{font-size:22px;font-weight:800;letter-spacing:-.01em}
.badge{
  display:inline-block;margin-top:10px;font-size:12px;font-weight:700;
  padding:4px 12px;border-radius:999px;background:var(--ok-soft);color:#0d9b73;
}
.badge.assisted{background:var(--brand-soft);color:var(--brand-d)}
.badge.needs_review{background:var(--warn-soft);color:#d96a1f}
.summary-text{font-size:14px;line-height:1.8;color:var(--ink-2)}
.tag-wrap{display:flex;flex-wrap:wrap;gap:8px}
.tag{
  font-size:12.5px;font-weight:600;color:var(--brand-d);background:var(--brand-soft);
  padding:5px 12px;border-radius:9px;
}
.tag.plain{color:var(--ink-2);background:var(--bg-2)}
.summary-meta{
  display:flex;justify-content:center;gap:18px;font-size:12px;color:var(--ink-3);
  margin:18px 0 4px;
}
.summary-meta span{display:inline-flex;align-items:center;gap:5px}

/* ---------- 引导聊天 ---------- */
.tutor{position:fixed;inset:0;background:var(--bg);z-index:40;display:none}
.tutor.active{display:block}
.tutor-inner{
  max-width:600px;margin:0 auto;height:100%;display:flex;flex-direction:column;
  padding:0 14px;
}
.tutor-bar{
  display:flex;align-items:center;gap:10px;padding:12px 2px 10px;flex:none;
}
.tutor-meta{flex:1;display:flex;align-items:center;gap:9px;min-width:0}
.subject-pill{
  font-size:12px;font-weight:700;padding:4px 11px;border-radius:999px;
  background:var(--ssoft,var(--brand-soft));color:var(--sc,var(--brand-d));
}
.tutor-turns{font-size:12px;color:var(--ink-3);white-space:nowrap;overflow:hidden;text-overflow:ellipsis;min-width:0}

.problem-card{
  flex:none;background:#fff;border-radius:var(--r);border:1px solid var(--line);
  box-shadow:0 1px 3px rgba(27,38,72,.04);overflow:hidden;
}
.problem-head{
  width:100%;display:flex;align-items:center;gap:9px;padding:11px 14px;text-align:left;
}
.problem-tag{
  font-size:11px;font-weight:700;color:var(--brand-d);background:var(--brand-soft);
  padding:2px 8px;border-radius:6px;flex:none;
}
.problem-peek{
  flex:1;min-width:0;font-size:12.5px;color:var(--ink-2);white-space:nowrap;overflow:hidden;text-overflow:ellipsis;
}
.problem-head .chev{color:var(--ink-3);transition:transform .22s}
.problem-card.open .chev{transform:rotate(90deg)}
.problem-body-wrap{max-height:0;overflow:hidden;transition:max-height .3s ease}
.problem-card.open .problem-body-wrap{max-height:320px;overflow-y:auto}
.problem-body{padding:0 14px 13px;font-size:13.5px;line-height:1.75;color:var(--ink-2);white-space:pre-wrap}

.chat{
  flex:1;overflow-y:auto;padding:16px 2px 8px;display:flex;flex-direction:column;gap:14px;
  scroll-behavior:smooth;
}
.chat::-webkit-scrollbar{width:4px}
.chat::-webkit-scrollbar-thumb{background:var(--line-2);border-radius:4px}

.msg{display:flex;gap:9px;max-width:92%;animation:pop .24s ease both}
.chat .msg:first-child{margin-top:auto}
@keyframes pop{from{opacity:0;transform:translateY(8px)}to{opacity:1;transform:none}}
.msg.ai{align-self:flex-start}
.msg.me{align-self:flex-end;flex-direction:row-reverse}
.avatar{
  width:30px;height:30px;border-radius:10px;flex:none;display:grid;place-items:center;
  font-size:12px;font-weight:800;color:#fff;
  background:linear-gradient(150deg,var(--brand),#7b8dff);
  box-shadow:0 6px 14px rgba(79,110,247,.24);margin-top:2px;
}
.bubble{
  padding:11px 14px;border-radius:16px;font-size:14px;line-height:1.72;
  word-break:break-word;white-space:pre-wrap;
}
.msg.ai .bubble{background:#fff;color:var(--ink);border-top-left-radius:6px;box-shadow:0 1px 3px rgba(27,38,72,.05);border:1px solid var(--line)}
.msg.me .bubble{background:var(--brand);color:#fff;border-top-right-radius:6px;box-shadow:0 6px 16px rgba(79,110,247,.24)}
.bubble strong{font-weight:750}
.bubble.typing{display:flex;gap:4px;align-items:center;padding:15px 16px}
.dot{width:6px;height:6px;border-radius:50%;background:var(--ink-3);animation:blink 1.3s infinite}
.dot:nth-child(2){animation-delay:.18s}
.dot:nth-child(3){animation-delay:.36s}
@keyframes blink{0%,60%,100%{opacity:.25;transform:translateY(0)}30%{opacity:1;transform:translateY(-3px)}}
.err-bubble{background:#fff4f5!important;border-color:#f8dde0!important;color:#c02a3a!important;font-size:13px}

.composer{flex:none;padding:8px 0 calc(12px + env(safe-area-inset-bottom))}
.quick-row{display:flex;gap:8px;margin-bottom:8px}
.qbtn{
  display:inline-flex;align-items:center;gap:5px;height:32px;padding:0 13px;
  border-radius:999px;background:#fff;border:1px solid var(--line-2);
  font-size:12.5px;font-weight:600;color:var(--ink-2);transition:.16s;
}
.qbtn:active{transform:scale(.95);background:var(--bg-2)}
.qbtn[disabled]{opacity:.45}
.input-row{
  display:flex;align-items:flex-end;gap:9px;background:#fff;border-radius:20px;
  padding:7px 7px 7px 16px;border:1px solid var(--line);box-shadow:0 4px 16px rgba(27,38,72,.06);
}
.input-row textarea{
  flex:1;border:none;outline:none;resize:none;font-size:14.5px;line-height:1.6;
  padding:8px 0;max-height:120px;background:transparent;
}
.send-btn{
  width:40px;height:40px;border-radius:14px;background:var(--brand);color:#fff;
  display:grid;place-items:center;flex:none;transition:.16s;
}
.send-btn:active{transform:scale(.93)}
.send-btn[disabled]{background:var(--line-2);color:#fff}

/* ---------- 家长端 ---------- */
.parent-layer{position:fixed;inset:0;background:var(--bg);z-index:45;overflow-y:auto;display:none}
.parent-layer.active{display:block}

.gate-wrap{display:flex;justify-content:center;padding-top:7vh}
.gate-card{width:100%;max-width:380px;text-align:center;padding:32px 26px 26px}
.gate-icon{
  width:54px;height:54px;margin:0 auto 16px;border-radius:17px;background:var(--brand-soft);
  color:var(--brand-d);display:grid;place-items:center;
}
.gate-card h2{font-size:19px;font-weight:780;margin-bottom:6px}
.pin-input{
  width:100%;height:56px;margin:20px 0 14px;border-radius:14px;border:1.5px solid var(--line-2);
  background:var(--bg);text-align:center;font-size:24px;letter-spacing:.5em;
  font-weight:700;outline:none;transition:.18s;
}
.pin-input:focus{border-color:var(--brand);background:#fff;box-shadow:0 0 0 4px rgba(79,110,247,.1)}
.gate-hint{font-size:11.5px;color:var(--ink-3);margin-top:14px}

.tabs{display:flex;gap:6px;background:#fff;padding:5px;border-radius:14px;border:1px solid var(--line);margin-bottom:14px;max-width:320px}
.tab{
  flex:1;height:38px;border-radius:10px;font-size:13px;font-weight:650;color:var(--ink-3);
  display:inline-flex;align-items:center;justify-content:center;gap:6px;transition:.18s;
}
.tab.active{background:var(--brand);color:#fff;box-shadow:0 4px 12px rgba(79,110,247,.24)}

.stat-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:10px}
.stat-card{background:#fff;border-radius:var(--r);padding:15px 16px;border:1px solid var(--line)}
.stat-num{font-size:25px;font-weight:800;letter-spacing:-.02em;line-height:1.2}
.stat-num small{font-size:13px;font-weight:600;color:var(--ink-3);margin-left:2px}
.stat-label{font-size:12px;color:var(--ink-3);margin-top:3px;font-weight:550}
.stat-card.accent{background:linear-gradient(150deg,var(--brand),#6c85ff);border:none;color:#fff}
.stat-card.accent .stat-num small,.stat-card.accent .stat-label{color:rgba(255,255,255,.8)}

.chart7{display:flex;align-items:flex-end;gap:8px;height:120px;padding-top:8px}
.bar-col{flex:1;display:flex;flex-direction:column;align-items:center;gap:6px;height:100%;justify-content:flex-end}
.bar-wrap{width:100%;display:flex;flex-direction:column;justify-content:flex-end;flex:1}
.bar{
  width:100%;max-width:30px;margin:0 auto;background:var(--brand-soft-2);border-radius:7px 7px 3px 3px;
  min-height:5px;transition:height .5s cubic-bezier(.32,1.2,.5,1);position:relative;
}
.bar.on{background:linear-gradient(180deg,#7b8dff,var(--brand))}
.bar-val{font-size:10.5px;color:var(--ink-3);font-weight:600;text-align:center;height:14px}
.bar-day{font-size:10.5px;color:var(--ink-3)}

.donut-row{display:flex;align-items:center;gap:20px;flex-wrap:wrap}
.donut{
  width:118px;height:118px;border-radius:50%;flex:none;display:grid;place-items:center;position:relative;
  background:conic-gradient(var(--line) 0deg 360deg);
}
.donut::before{content:"";position:absolute;inset:15px;background:#fff;border-radius:50%}
.donut-center{position:relative;font-size:19px;font-weight:800;text-align:center;line-height:1.1}
.donut-center small{display:block;font-size:10.5px;font-weight:600;color:var(--ink-3);margin-top:2px}
.legend{display:flex;flex-direction:column;gap:9px;flex:1;min-width:130px}
.legend-row{display:flex;align-items:center;gap:8px;font-size:12.5px}
.legend-dot{width:9px;height:9px;border-radius:3px;flex:none}
.legend-name{color:var(--ink-2);flex:1}
.legend-val{color:var(--ink-3);font-weight:650}

.review-list{display:flex;flex-direction:column;gap:8px}
.review-row{
  display:flex;align-items:center;gap:9px;font-size:12.5px;color:var(--ink-2);
  padding:9px 11px;background:var(--warn-soft);border-radius:var(--r-sm);
}
.review-row .txt{flex:1;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.foot-note{font-size:11.5px;color:var(--ink-3);text-align:center;margin-top:22px;line-height:1.8}

.filter-row{display:flex;gap:7px;overflow-x:auto;padding-bottom:12px;scrollbar-width:none}
.filter-row::-webkit-scrollbar{display:none}
.filter-row .chip{flex:none;height:31px;padding:0 14px;font-size:12.5px}

.records{display:flex;flex-direction:column;gap:10px}
.rec-card{
  background:#fff;border-radius:var(--r);padding:14px 16px;border:1px solid var(--line);
  width:100%;text-align:left;transition:.16s;
}
.rec-card:active{background:#fcfdff;transform:scale(.995)}
.rec-head{display:flex;align-items:center;gap:8px;margin-bottom:7px}
.rec-subject{font-size:11px;font-weight:700;padding:2px 9px;border-radius:6px;background:var(--ssoft);color:var(--sc)}
.rec-time{font-size:11.5px;color:var(--ink-3);margin-left:auto}
.rec-text{font-size:13.5px;color:var(--ink);line-height:1.6;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.rec-foot{display:flex;align-items:center;gap:10px;margin-top:9px;font-size:11.5px;color:var(--ink-3)}
.rec-tag{background:var(--bg-2);padding:2px 8px;border-radius:6px}
.status-dot{display:inline-flex;align-items:center;gap:4px}
.status-dot i{width:6px;height:6px;border-radius:50%;background:var(--ok);display:block}

/* ---------- 弹窗 ---------- */
.modal{position:fixed;inset:0;z-index:60;display:flex;align-items:flex-end;justify-content:center}
.modal[hidden]{display:none}
.modal-mask{position:absolute;inset:0;background:rgba(20,26,45,.42);backdrop-filter:blur(2px);animation:fade .2s}
.modal-card{
  position:relative;background:#fff;border-radius:24px 24px 0 0;width:100%;max-width:560px;
  max-height:90dvh;display:flex;flex-direction:column;animation:sheet .3s cubic-bezier(.32,1.1,.5,1);
  box-shadow:var(--sh-lg);
}
@keyframes sheet{from{transform:translateY(40px);opacity:.6}to{transform:none;opacity:1}}
.modal-card.small{max-width:420px}
.modal-card.wide-card{max-width:640px}
@media(min-width:640px){
  .modal{align-items:center}
  .modal-card{border-radius:22px;max-height:86dvh}
}
.modal-head{display:flex;align-items:center;justify-content:space-between;padding:18px 20px 10px;flex:none}
.modal-head h3{font-size:16.5px;font-weight:780}
.modal-body{padding:4px 20px 8px;overflow-y:auto;flex:1}
.modal-foot{display:flex;gap:10px;padding:12px 20px calc(18px + env(safe-area-inset-bottom));flex:none}
.modal-foot .btn{flex:1}
.modal-divider{height:1px;background:var(--line);margin:18px 0 14px}

.field{margin-bottom:14px}
.field label{display:flex;align-items:center;gap:8px;font-size:12.5px;font-weight:650;color:var(--ink-2);margin-bottom:6px}
.field-hint{margin-left:auto;font-size:11px;font-weight:500;color:var(--ink-3)}
.inp{
  width:100%;height:44px;border-radius:12px;border:1.5px solid var(--line-2);background:var(--bg);
  padding:0 13px;font-size:14px;outline:none;transition:.16s;
}
.inp:focus{border-color:var(--brand);background:#fff;box-shadow:0 0 0 3px rgba(79,110,247,.09)}
.field-tip{font-size:11.5px;color:var(--ink-3);margin-top:6px;line-height:1.6}
.danger-row{display:flex;gap:9px;flex-wrap:wrap}

/* ---------- toast / loader ---------- */
.toast{
  position:fixed;left:50%;bottom:42px;transform:translate(-50%,20px);z-index:99;
  background:rgba(27,32,51,.92);color:#fff;font-size:13px;padding:10px 18px;border-radius:12px;
  opacity:0;pointer-events:none;transition:.26s;max-width:82vw;text-align:center;
  backdrop-filter:blur(8px);
}
.toast.show{opacity:1;transform:translate(-50%,0)}
.loader{position:fixed;inset:0;z-index:80;display:grid;place-items:center;background:rgba(244,246,251,.72);backdrop-filter:blur(3px)}
.loader[hidden]{display:none}
.loader-card{background:#fff;border-radius:20px;padding:26px 34px;text-align:center;box-shadow:var(--sh-lg)}
.loader-card p{font-size:13px;color:var(--ink-2);margin-top:14px;font-weight:600}
.spinner{
  width:30px;height:30px;margin:0 auto;border-radius:50%;
  border:2.6px solid var(--brand-soft-2);border-top-color:var(--brand);
  animation:spin .8s linear infinite;
}
@keyframes spin{to{transform:rotate(360deg)}}

/* ---------- 记录详情 ---------- */
.rec-detail-meta{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:14px}
.rec-detail-meta .tag{font-size:11.5px}
.transcript{display:flex;flex-direction:column;gap:10px;margin-top:6px}
.tr-row{display:flex;gap:8px}
.tr-row.me{flex-direction:row-reverse}
.tr-bubble{
  max-width:82%;padding:9px 12px;border-radius:13px;font-size:13px;line-height:1.7;
  background:var(--bg-2);color:var(--ink);white-space:pre-wrap;word-break:break-word;
}
.tr-row.me .tr-bubble{background:var(--brand);color:#fff}
.rec-img{width:100%;border-radius:12px;margin-bottom:12px;display:block;border:1px solid var(--line)}
.detail-actions{display:flex;justify-content:flex-end;margin-top:16px}

/* ---------- 移动端细化 ---------- */
.mock-note{
  margin-top:12px;padding:10px 13px;border-radius:12px;background:var(--warn-soft);
  color:#a5622a;font-size:12px;line-height:1.65;font-weight:550;
}

/* ---------- 宽屏：家长端双栏 ---------- */
@media(min-width:820px){
  .shell.wide{max-width:1040px}
  .stat-grid{grid-template-columns:repeat(3,1fr)}
  #tabStats{display:grid;grid-template-columns:1fr 1fr;gap:12px;align-items:start}
  #tabStats[hidden]{display:none!important}
  #tabStats .stat-grid,#tabStats .foot-note{grid-column:1 / -1}
  #tabStats .card{margin-top:0}
  .gate-wrap{padding-top:12vh}
}

@media(max-width:400px){
  .shell{padding:0 14px 40px}
  .hero-title{font-size:23px}
  .upload-card{padding:28px 16px 24px}
  .stat-num{font-size:22px}
}