:root{
  /* 彩虹糖果色板 */
  --pink:#FF9EC4; --pink-d:#F06CA6;
  --blue:#7EC8FF; --blue-d:#3FA9F5;
  --yellow:#FFD866; --yellow-d:#F5BE2E;
  --green:#8FE388; --green-d:#54C24A;
  --purple:#C9A7FF; --purple-d:#9B6FFF;
  --ink:#4A3B57; --ink-soft:#7A6B86;
  --bg:#FFF7FB; --card:#FFFFFF;
  --shadow:0 8px 22px rgba(180,120,180,.16);
  --radius:22px;
  /* 模块主色 */
  --m-en:var(--blue); --m-po:var(--green); --m-math:var(--pink);
  --m-logic:var(--purple); --m-adv:var(--yellow);
}
*{box-sizing:border-box;-webkit-tap-highlight-color:transparent}
html,body{margin:0;padding:0;height:100%}
body{
  font-family:"PingFang SC","Microsoft YaHei",system-ui,sans-serif;
  background:
    radial-gradient(1200px 600px at 10% -10%, #FFE3F1 0, transparent 60%),
    radial-gradient(1000px 500px at 110% 0%, #E3F1FF 0, transparent 55%),
    var(--bg);
  color:var(--ink);
  font-size:clamp(15px,1.6vw,17px);
  -webkit-text-size-adjust:100%;
  overscroll-behavior-y:none;
}
#app{min-height:100%}

/* ---------- 通用按钮（小手 ≥44px） ---------- */
.btn{
  border:none;cursor:pointer;border-radius:999px;
  min-height:44px;padding:12px 20px;font-size:16px;font-weight:700;color:#fff;
  background:var(--pink);box-shadow:var(--shadow);
  transition:transform .12s ease, filter .12s ease;
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
}
.btn:active{transform:scale(.95)}
.btn.big{min-height:56px;font-size:18px;padding:16px 26px}
.btn.blue{background:var(--blue)} .btn.green{background:var(--green)}
.btn.yellow{background:var(--yellow);color:var(--ink)} .btn.purple{background:var(--purple)}
.btn.ghost{background:#fff;color:var(--ink);box-shadow:inset 0 0 0 2px #F0DDEA}
.btn[disabled]{filter:grayscale(.6) opacity(.6);cursor:not-allowed}

.card{background:var(--card);border-radius:var(--radius);box-shadow:var(--shadow);padding:18px}
.muted{color:var(--ink-soft);font-size:14px}
.pill{display:inline-flex;align-items:center;gap:6px;background:#F6F0FF;border-radius:999px;padding:5px 12px;font-size:13px;margin:3px 6px 3px 0}
.kbd{background:#F0E6FA;border-radius:6px;padding:1px 7px;font-family:ui-monospace,monospace;font-size:12px;color:#7A4FB0}

/* ---------- 年级/学期选择页 ---------- */
.gate{min-height:100vh;display:flex;flex-direction:column;align-items:center;justify-content:center;padding:24px 16px 60px;text-align:center}
.gate h1{font-size:clamp(26px,5vw,40px);margin:6px 0 2px;
  background:linear-gradient(90deg,var(--pink),var(--purple),var(--blue),var(--green));
  -webkit-background-clip:text;background-clip:text;color:transparent}
.gate .sub{color:var(--ink-soft);margin-bottom:18px}
.gate .child-input{margin:8px 0 18px}
.gate input{font-size:16px;padding:10px 14px;border-radius:14px;border:2px solid #F0DDEA;min-width:200px;text-align:center}
.grade-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(120px,1fr));gap:12px;max-width:640px;width:100%}
.grade-card{border-radius:18px;padding:16px 10px;background:#fff;box-shadow:var(--shadow);cursor:pointer;border:3px solid transparent;transition:.15s}
.grade-card.on{border-color:var(--pink);transform:translateY(-3px)}
.grade-card.locked{filter:grayscale(.7) opacity(.55);cursor:not-allowed}
.term-row{display:flex;gap:10px;margin:16px 0;flex-wrap:wrap;justify-content:center}
.term-chip{padding:10px 18px;border-radius:999px;background:#fff;box-shadow:var(--shadow);cursor:pointer;border:3px solid transparent;font-weight:700}
.term-chip.on{border-color:var(--blue)}

/* ---------- 主工作台布局 ---------- */
.workbench{display:flex;min-height:100vh}
/* PC 侧边栏 */
.sidebar{
  width:210px;flex:0 0 210px;background:#fff;box-shadow:var(--shadow);
  padding:18px 12px;display:flex;flex-direction:column;gap:8px;position:sticky;top:0;height:100vh;
}
.brand{display:flex;align-items:center;gap:8px;font-weight:800;font-size:18px;margin:4px 6px 10px;color:var(--ink)}
.nav-item{display:flex;align-items:center;gap:10px;padding:13px 14px;border-radius:14px;cursor:pointer;font-weight:700;color:var(--ink-soft);min-height:48px}
.nav-item .ic{font-size:22px}
.nav-item.on{background:linear-gradient(90deg,#FFE3F1,#E3F1FF);color:var(--ink)}
.nav-item:hover{background:#FBF2F9}
.side-foot{margin-top:auto;font-size:12px;color:var(--ink-soft);padding:8px}
.topbar{display:none}

.main{flex:1;min-width:0;padding:18px clamp(14px,3vw,40px) 96px;max-width:1100px;margin:0 auto}
.module-head{display:flex;align-items:center;gap:12px;margin-bottom:14px;flex-wrap:wrap}
.module-head h2{margin:0;font-size:clamp(20px,3vw,28px)}
.stars-badge{margin-left:auto;background:#FFF3D6;border-radius:999px;padding:8px 16px;font-weight:800;color:#B8860B;display:flex;align-items:center;gap:6px}

/* ---------- 移动端底部 Tab ---------- */
.bottomtab{display:none}
@media (max-width:899px){
  .workbench{flex-direction:column}
  .sidebar{display:none}
  .main{padding:14px 14px 92px}
  .topbar{display:flex;position:sticky;top:0;z-index:20;align-items:center;gap:10px;
    background:#fff;box-shadow:var(--shadow);padding:10px 14px;font-weight:800;font-size:17px}
  .bottomtab{
    display:flex;position:fixed;left:0;right:0;bottom:0;z-index:30;
    background:#fff;box-shadow:0 -6px 20px rgba(180,120,180,.18);
    padding-bottom:env(safe-area-inset-bottom);
  }
  .bottomtab .tab{flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;
    gap:2px;padding:8px 2px 10px;font-size:11px;font-weight:700;color:var(--ink-soft);min-height:56px}
  .bottomtab .tab .ic{font-size:22px}
  .bottomtab .tab.on{color:var(--pink-d)}
  .bottomtab .tab.on .ic{transform:scale(1.12)}
}

/* ---------- 通用内容组件 ---------- */
.grid2{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.grid3{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}
@media (max-width:680px){.grid2,.grid3{grid-template-columns:1fr}}
.section-title{font-weight:800;font-size:18px;margin:18px 0 8px;display:flex;align-items:center;gap:8px}
.sub-card{background:#fff;border-radius:18px;box-shadow:var(--shadow);padding:16px;cursor:pointer;border:3px solid transparent;transition:.15s}
.sub-card:hover{transform:translateY(-2px)}
.sub-card .emo{font-size:30px}
.choice{display:block;width:100%;text-align:left;background:#fff;border:2px solid #F0DDEA;border-radius:16px;padding:14px 16px;margin:8px 0;font-size:16px;cursor:pointer;min-height:52px;transition:.12s}
.choice:active{transform:scale(.98)}
.choice.ok{border-color:var(--green);background:#F1FBEF}
.choice.no{border-color:#FF8B8B;background:#FFF0F0}
.choice .emo{font-size:22px;margin-right:8px}
.big-read{font-size:clamp(28px,6vw,46px);font-weight:800;text-align:center;padding:18px 10px}
.pinyin{color:var(--ink-soft);font-size:.5em;letter-spacing:1px}
.sentence{font-size:22px;line-height:2;text-align:center;padding:10px}
.sentence .w{cursor:pointer;border-radius:8px;padding:0 2px}
.sentence .w:hover{background:#FFF3D6}
.mic-btn{width:84px;height:84px;border-radius:50%;border:none;background:var(--pink);color:#fff;font-size:36px;box-shadow:var(--shadow);cursor:pointer;display:block;margin:16px auto}
.mic-btn.listening{background:var(--blue);animation:pulse 1s infinite}
@keyframes pulse{0%,100%{transform:scale(1)}50%{transform:scale(1.08)}}
.badge{width:74px;height:74px;border-radius:20px;display:flex;align-items:center;justify-content:center;font-size:34px;background:#F3EEFA;box-shadow:var(--shadow)}
.badge.got{background:linear-gradient(135deg,#FFE3F1,#E3F1FF)}
.badge.locked{filter:grayscale(1) opacity(.4)}
.progress{height:12px;border-radius:999px;background:#F0E6FA;overflow:hidden}
.progress>span{display:block;height:100%;background:linear-gradient(90deg,var(--pink),var(--purple))}
.toast{position:fixed;left:50%;bottom:90px;transform:translateX(-50%) translateY(20px);background:var(--ink);color:#fff;padding:12px 20px;border-radius:999px;opacity:0;transition:.25s;pointer-events:none;z-index:99;font-weight:700}
.toast.show{opacity:1;transform:translateX(-50%) translateY(0)}
.speech-note{background:#EFF7FF;border:1px solid #BFE0FF;border-radius:14px;padding:10px 14px;font-size:13px;color:#3A6EA5;margin-top:10px}
.confetti{position:fixed;inset:0;pointer-events:none;z-index:90}
.row{display:flex;gap:10px;flex-wrap:wrap;align-items:center}
.spacer{flex:1}