:root{
  --green:#5dbe74;
  --green-deep:#3f9e57;
  --green-soft:#e8f6ec;
  --bg:#f0f7f4;
  --card:#ffffff;
  --ink:#2c3e35;
  --muted:#7d8a83;
  --line:#e2ede7;
  --accent:#ff9f43;
  --accent-soft:#fff1e0;
  --blue:#56b3e0;
  --blue-soft:#e6f4fb;
  --shadow:0 6px 22px rgba(63,158,87,.10);
  --radius:18px;
}
*{box-sizing:border-box;margin:0;padding:0}
html,body{height:100%}
body{
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;
  background:var(--bg);
  color:var(--ink);
  -webkit-font-smoothing:antialiased;
  line-height:1.55;
}
img{display:block;max-width:100%}
button{font-family:inherit;cursor:pointer;border:none;background:none}
input,select,textarea{font-family:inherit;font-size:.95rem}

/* ---------- 布局：左侧固定导航 + 右侧内容 ---------- */
.shell{display:flex;min-height:100vh}
.rail{
  width:108px;flex:0 0 108px;
  background:linear-gradient(180deg,var(--green) 0%,var(--green-deep) 100%);
  color:#fff;display:flex;flex-direction:column;align-items:center;
  padding:18px 0;position:sticky;top:0;height:100vh;
}
.rail-brand{font-weight:800;font-size:.82rem;text-align:center;line-height:1.3;margin-bottom:18px;opacity:.95}
.rail-brand .paw{font-size:1.5rem;display:block;margin-bottom:2px}
.nav-btn{
  width:88px;padding:11px 4px;margin:5px 0;border-radius:14px;color:#eafaf0;
  display:flex;flex-direction:column;align-items:center;gap:3px;font-size:.78rem;font-weight:600;
  transition:background .2s,transform .15s;
}
.nav-btn .ico{font-size:1.35rem}
.nav-btn:hover{background:rgba(255,255,255,.14)}
.nav-btn.active{background:#fff;color:var(--green-deep);box-shadow:0 4px 12px rgba(0,0,0,.12)}
.teacher-hide{display:none !important}
.rail-teacher{margin-top:auto;background:rgba(255,255,255,.12);color:#fff;border:none;border-radius:10px;padding:8px 6px;font-size:.78rem;cursor:pointer}
.rail-teacher:hover{background:rgba(255,255,255,.22)}

.app{flex:1;min-width:0;display:flex;flex-direction:column}
.container{max-width:880px;width:100%;margin:0 auto;padding:18px 18px 40px}
.top{display:flex;justify-content:space-between;align-items:center;margin-bottom:16px}
.greeting h1{font-size:1.35rem;color:var(--green-deep)}
.greeting p{color:var(--muted);font-size:.85rem}
.streak-pill{background:var(--accent-soft);color:#d68910;font-weight:700;padding:7px 14px;border-radius:999px;font-size:.9rem}

.panel{display:none}
.panel.active{display:block;animation:fade .3s ease}
@keyframes fade{from{opacity:0;transform:translateY(6px)}to{opacity:1;transform:none}}

/* ---------- 卡片 ---------- */
.card{background:var(--card);border-radius:var(--radius);box-shadow:var(--shadow);padding:18px;margin-bottom:16px}
.card-title{font-weight:800;font-size:1.05rem;color:var(--ink)}
.card-sub{color:var(--muted);font-size:.82rem;margin-top:2px}

.main-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px}
@media(max-width:720px){.main-grid{grid-template-columns:1fr}}

/* ---------- 宠物卡片 ---------- */
.pet-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:8px}
.pet-name{font-weight:800;font-size:1.05rem}
.pet-level{background:var(--green-soft);color:var(--green-deep);font-weight:800;padding:3px 10px;border-radius:999px;font-size:.85rem}
.pet-stage{
  position:relative;height:320px;display:flex;align-items:center;justify-content:center;
  background:radial-gradient(120% 90% at 50% 18%,#fbfffc 0%,#eafaf0 60%,#dff3e6 100%);
  border-radius:16px;overflow:hidden;
}
.pet-wrap{
  transform-origin:center bottom;
  transition:transform .5s cubic-bezier(.2,.8,.2,1);
  filter:drop-shadow(0 14px 10px rgba(63,158,87,.22));
  width:260px;height:260px;display:flex;align-items:center;justify-content:center;
}
/* 宠物 2D 图片展示 */
.pet-svg{
  position:relative;z-index:2;
  width:260px;height:260px;
  display:flex;align-items:center;justify-content:center;
  transition:filter .5s ease;
}
.pet-svg img{
  width:100%;height:100%;
  object-fit:contain;
  pointer-events:none;
  user-select:none;
}
.pet-emoji{
  font-size:7rem;
  line-height:1;
  user-select:none;
  animation:petFloat 3s ease-in-out infinite;
}
.plant-emoji{
  font-size:7rem;line-height:1;user-select:none;
  animation:petFloat 3s ease-in-out infinite;
  display:inline-block;
}
.plant-emoji-big{font-size:9rem}
@keyframes petFloat{
  0%,100%{transform:translateY(0) scale(1)}
  50%{transform:translateY(-8px) scale(1.05)}
}
.pet-wrap.happy{animation:squish .5s ease}
@keyframes squish{0%{transform:scale(1)}30%{transform:scale(1.08,.92)}60%{transform:scale(.96,1.05)}100%{transform:scale(1)}}
.levelup-ring{
  position:absolute;inset:0;pointer-events:none;border-radius:16px;
  box-shadow:0 0 0 0 rgba(93,190,116,.6);opacity:0;
}
.levelup-ring.show{animation:aura .9s ease}
@keyframes aura{0%{opacity:.9;box-shadow:0 0 0 0 rgba(93,190,116,.55)}100%{opacity:0;box-shadow:0 0 0 26px rgba(93,190,116,0)}}
.speech{
  position:absolute;top:12px;left:50%;transform:translateX(-50%);
  background:#fff;border:1px solid var(--line);color:var(--ink);
  padding:8px 16px;border-radius:18px;font-size:.85rem;font-weight:700;box-shadow:var(--shadow);
  max-width:88%;text-align:center;z-index:10;
  animation:speechPop .25s cubic-bezier(.2,.9,.4,1);
  border-bottom-left-radius:4px;
}
.speech:empty{display:none}
@keyframes speechPop{
  0%{transform:translateX(-50%) scale(.7);opacity:0}
  70%{transform:translateX(-50%) scale(1.08)}
  100%{transform:translateX(-50%) scale(1);opacity:1}
}
.pet-gone{position:absolute;inset:0;display:none;flex-direction:column;align-items:center;justify-content:center;gap:10px;text-align:center;padding:18px;background:rgba(240,247,244,.96)}
.pet-gone .pe{font-size:3rem;opacity:.5}
.pet-gone p{color:var(--muted);font-size:.9rem}
.pet-gone button{margin-top:6px;background:var(--green);color:#fff;font-weight:700;padding:10px 18px;border-radius:12px}

/* 进度条 */
.meters{margin-top:14px;display:flex;flex-direction:column;gap:9px}
.meter label{font-size:.78rem;color:var(--muted);display:flex;justify-content:space-between}
.meter label b{color:var(--ink);font-weight:700}
.bar{height:11px;background:var(--green-soft);border-radius:999px;overflow:hidden;margin-top:3px}
.bar span{display:block;height:100%;border-radius:999px;transition:width .5s ease}
.bar-health span{background:linear-gradient(90deg,#7ed89a,#3f9e57)}
.bar-full span{background:linear-gradient(90deg,#ffd27d,#ff9f43)}
.bar-water span{background:linear-gradient(90deg,#8fd4f2,#56b3e0)}
.bar-happy span{background:linear-gradient(90deg,#ffc2d6,#ff7aa8)}
.bar-xp span{background:linear-gradient(90deg,#c4a6ff,#8a5cff)}
.bar-sun span{background:linear-gradient(90deg,#ffd27d,#ff9f43)}
.bar-fert span{background:linear-gradient(90deg,#a8d88a,#6ab04c)}
.bar.low span{background:linear-gradient(90deg,#ff9a9a,#e85d5d)!important}

.pet-actions{display:flex;gap:10px;margin-top:14px}
.pet-actions button{flex:1;padding:12px;border-radius:13px;font-weight:800;font-size:.95rem;transition:transform .12s,filter .2s}
.pet-actions button:active{transform:scale(.96)}
.btn-feed{background:var(--accent-soft);color:#d68910}
.btn-water{background:var(--blue-soft);color:#2b7fa6}
.btn-fert{background:#eaf6e0;color:#4a8a2a}
.pet-actions button:disabled{opacity:.45;filter:grayscale(.4);cursor:not-allowed}

/* ---------- 今日任务 ---------- */
.tasks-head{display:flex;justify-content:space-between;align-items:center;margin-bottom:10px}
.tasks-count{background:var(--green-soft);color:var(--green-deep);font-weight:800;padding:4px 12px;border-radius:999px}
.punish-note{font-size:.82rem;padding:8px 12px;border-radius:12px;margin-bottom:10px;background:#fff4e8;color:#c9742b}
.punish-note.ok{background:var(--green-soft);color:var(--green-deep)}
.task-list{display:flex;flex-direction:column;gap:10px}
.task-item{display:flex;align-items:center;gap:12px;background:var(--bg);border:1px solid var(--line);border-radius:14px;padding:12px;text-align:left;transition:background .2s}
.task-item:hover{background:var(--green-soft)}
.task-item.done{background:var(--green-soft);border-color:#c7e8d1}
.task-icon{font-size:1.5rem;width:38px;text-align:center}
.task-info{flex:1}
.task-info h3{font-size:.98rem}
.task-info p{font-size:.78rem;color:var(--muted)}
.task-check{font-size:1.3rem;color:var(--muted);font-weight:800}
.task-item.done .task-check{color:var(--green-deep)}
.checkin-btn{width:100%;margin-top:14px;padding:14px;border-radius:14px;background:var(--green);color:#fff;font-weight:800;font-size:1rem;transition:filter .2s,transform .12s}
.checkin-btn:active{transform:scale(.98)}
.checkin-btn:disabled{background:#cdddd4;color:#8aa395;cursor:not-allowed}

/* ---------- 通用内容面板 ---------- */
.panel-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:12px}
.panel-header h2{font-size:1.15rem;color:var(--green-deep)}
.close-btn{width:34px;height:34px;border-radius:10px;background:var(--bg);color:var(--muted);font-size:1.1rem}
.card-sub{color:var(--muted);font-size:.84rem;margin-bottom:12px;line-height:1.5}

/* 计算题图片网格 */
.calc-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(132px,1fr));gap:12px}
.calc-item{position:relative;background:var(--bg);border:1px solid var(--line);border-radius:14px;padding:8px;display:flex;flex-direction:column;align-items:center;gap:6px;cursor:pointer;transition:border-color .2s,background .2s}
.calc-item img{width:100%;height:auto;border-radius:8px;background:#fff}
.calc-item.marked{border-color:var(--green);background:var(--green-soft)}
.calc-item.wrong{border-color:#e88;background:#fff0f0}
.calc-tip{font-size:.74rem;color:var(--muted)}
.calc-item.marked .calc-tip{color:var(--green-deep);font-weight:700}
.wrong-btn{font-size:.74rem;padding:5px 10px;border-radius:9px;background:#fff;border:1px solid var(--line);color:#c0495b}
.calc-item.wrong .wrong-btn{background:#fde;color:#c0495b;border-color:#e9b3bd}

/* 单词闪卡 */
.vocab-top{display:flex;justify-content:space-between;color:var(--muted);font-size:.85rem;margin-bottom:10px}
.flashcard{background:linear-gradient(160deg,#ffffff,#f1faf4);border:1px solid var(--line);border-radius:18px;padding:30px 20px;text-align:center;min-height:170px;display:flex;flex-direction:column;justify-content:center;cursor:pointer;box-shadow:var(--shadow)}
.word-en{font-size:2rem;font-weight:800;color:var(--green-deep)}
.word-pos{color:var(--muted);font-size:.9rem;margin-top:6px}
.word-cn{font-size:1.25rem;margin-top:10px;color:#1e6fea;font-family:"SimSun","Songti SC","宋体",serif;text-align:center}
.word-hint{color:var(--muted);font-size:.82rem;margin-top:14px}
.vocab-btns{display:flex;gap:10px;margin-top:14px}
.vocab-btns button{flex:1;padding:13px;border-radius:13px;font-weight:700}
.btn-know{background:var(--green-soft);color:var(--green-deep)}
.btn-vague{background:var(--accent-soft);color:#d68910}
.btn-forget{background:var(--blue-soft);color:#2b7fa6}

/* 语文 */
.chinese-list{display:flex;flex-direction:column;gap:12px}
.chinese-card{background:var(--bg);border:1px solid var(--line);border-radius:14px;padding:14px}
.chinese-head{display:flex;justify-content:space-between;align-items:center}
.chinese-head h3{font-size:1.02rem}
.chinese-type{font-size:.74rem;background:var(--green-soft);color:var(--green-deep);padding:2px 9px;border-radius:999px}
.chinese-meta{color:var(--muted);font-size:.8rem;margin:4px 0 8px}
.chinese-content{font-size:.95rem;line-height:1.8;white-space:pre-wrap;max-height:240px;overflow:auto}
.mark-btn{margin-top:10px;padding:9px 16px;border-radius:11px;background:var(--green);color:#fff;font-weight:700}
.chinese-card.done{border-color:var(--green);background:var(--green-soft)}
.chinese-card.done .mark-btn{background:#cdddd4;color:#7d8a83}

/* 错题本 */
.wrong-section{margin-bottom:18px}
.wrong-section h3{font-size:1rem;margin-bottom:10px;color:var(--ink)}
.wrong-word{display:flex;justify-content:space-between;align-items:center;background:var(--bg);border:1px solid var(--line);border-radius:12px;padding:10px 12px;margin-bottom:8px}
.wrong-word button{background:var(--green-soft);color:var(--green-deep);padding:6px 12px;border-radius:9px;font-weight:700;font-size:.82rem}
.wrong-empty{text-align:center;color:var(--muted);padding:30px}

.finish-bar{margin-top:16px}

/* 上传区 */
.upload-bar{display:flex;gap:10px;align-items:center;margin:12px 0;flex-wrap:wrap}
.upload-bar .btn-primary{font-size:.88rem;padding:8px 14px}
.answer-section{background:var(--bg);border:1px solid var(--line);border-radius:14px;padding:14px;margin-top:18px}
.answer-section h3{font-size:1rem;margin-bottom:6px}
.answer-list{display:flex;flex-direction:column;gap:10px;margin-top:10px}
.answer-item{position:relative;background:#fff;border:1px solid var(--line);border-radius:12px;padding:8px;display:flex;flex-direction:column;gap:6px}
.answer-item img,.answer-item video{width:100%;max-height:220px;object-fit:contain;border-radius:8px;background:#fff}
.answer-del{align-self:flex-end;background:#fff0f0;color:#c0495b;padding:5px 11px;border-radius:9px;font-size:.8rem;font-weight:700}
.media-missing{color:var(--muted);font-size:.8rem;padding:6px}

/* 单词：音标、发音、默写 */
.vocab-modes{display:flex;gap:8px;margin-bottom:12px}
.vocab-modes button{flex:1;padding:9px;border-radius:11px;background:#fff;border:1px solid var(--line);font-weight:700;color:var(--muted)}
.vocab-modes button.active{background:var(--green);color:#fff;border-color:var(--green)}
.vocab-modes button:disabled{opacity:.4;filter:grayscale(.5);cursor:not-allowed}
.cn-lock-hint{margin:0 0 12px;padding:8px 12px;border-radius:10px;background:#fff7e6;border:1px dashed #f0c36d;color:#a9761b;font-size:.86rem;font-weight:600}
.chinese-card button:disabled{opacity:.5;cursor:not-allowed;filter:grayscale(.4)}
.vocab-group{margin-bottom:1.2rem}
.vocab-group-title{font-size:1.05rem;font-weight:700;color:var(--green-deep);margin:.8rem 0 .4rem;padding-bottom:.3rem;border-bottom:2px solid var(--green-light)}
.vocab-group-content{min-height:2rem}
.word-line{display:flex;align-items:center;justify-content:center;gap:10px}
.speak-btn{font-size:1.3rem;background:var(--green-soft);width:38px;height:38px;border-radius:50%;display:flex;align-items:center;justify-content:center}
.btn-speak{margin-left:10px;padding:8px 14px;border-radius:10px;background:var(--green-soft);color:var(--green-deep);font-weight:700}
.word-py{color:var(--blue);font-size:1rem;margin-top:6px;font-family:Georgia,serif}
.dictation-card{min-height:150px}
.dictation-input-wrap{display:flex;gap:10px;margin-top:14px}
.dictation-input{flex:1;padding:12px 14px;border:1px solid var(--line);border-radius:12px;font-size:1.05rem}
.dictation-result{margin-top:12px;display:flex;align-items:center;gap:10px;flex-wrap:wrap;min-height:36px}
.dictation-result .ok{color:var(--green-deep);font-weight:700}
.dictation-result .bad{color:#c0495b;font-weight:700}
.dictation-done{text-align:center;padding:30px}
.dictation-done h3{font-size:1.2rem;margin-bottom:8px}
.dictation-done p{color:var(--muted);margin-bottom:16px}

/* ---------- 设置 ---------- */
.setting-block{background:var(--bg);border-radius:14px;padding:14px;margin-bottom:14px}
.setting-block h3{font-size:1rem;margin-bottom:10px}

/* 教师端：整洁标签页布局 */
.teacher-wrap{max-width:880px;margin:0 auto}
.teacher-tabs{display:flex;gap:8px;flex-wrap:wrap;margin:14px 0 16px}
.teacher-tab{padding:9px 16px;border-radius:999px;background:#fff;border:1px solid var(--line);color:var(--muted);font-weight:700;font-size:.88rem;cursor:pointer;transition:all .15s}
.teacher-tab:hover{background:var(--green-soft)}
.teacher-tab.active{background:var(--green);color:#fff;border-color:var(--green)}
.teacher-panels{position:relative}
.teacher-panel{display:none}
.teacher-panel.active{display:block;animation:fade .25s ease}
@keyframes fade{from{opacity:0;transform:translateY(6px)}to{opacity:1;transform:none}}
.tb-section{background:var(--card);border-radius:var(--radius);box-shadow:var(--shadow);padding:16px 18px;margin-bottom:14px}
.tb-section-title{font-weight:800;font-size:1.05rem;color:var(--ink);margin-bottom:4px}
.tb-hint{font-size:.82rem;color:var(--muted);margin:8px 0 10px;font-weight:600}
.tb-details{margin-top:10px}
.topic-chips{display:flex;flex-wrap:wrap;gap:8px}
.chip-toggle{display:inline-flex;align-items:center;gap:6px;padding:7px 13px;border-radius:999px;background:#fff;border:1px solid var(--line);color:var(--ink);font-size:.85rem;cursor:pointer;user-select:none;transition:all .15s}
.chip-toggle:hover{background:var(--green-soft)}
.chip-toggle input{accent-color:var(--green);width:16px;height:16px}
.chip-toggle.on{background:var(--green);color:#fff;border-color:var(--green)}
.teacher-action-bar{display:flex;gap:10px;flex-wrap:wrap;margin-top:18px;padding-top:14px;border-top:1px solid var(--line)}
.pw-msg{font-size:.85rem;margin:8px 0;min-height:1.2em}
.pw-msg.err{color:#c0392b}
.pw-msg.ok{color:#2e7d32}
.setting-row{display:flex;align-items:center;justify-content:space-between;gap:10px;margin:8px 0}
.setting-row label{font-size:.88rem;color:var(--ink)}
.setting-row input[type=number]{width:70px;padding:7px;border:1px solid var(--line);border-radius:9px;text-align:center}
.setting-row select{padding:7px 10px;border:1px solid var(--line);border-radius:9px;background:#fff}
.task-manage-row{display:flex;align-items:center;gap:10px;padding:7px 0;border-bottom:1px dashed var(--line)}
.task-manage-row input[type=checkbox]{width:18px;height:18px;accent-color:var(--green)}
.tm-name{flex:1;font-size:.92rem}
.tm-name small{display:block;color:var(--muted);font-size:.74rem}
.tm-del{background:#fff0f0;color:#c0495b;padding:5px 11px;border-radius:9px;font-size:.8rem}
.topic-filter{background:#fafdfa;border:1px dashed #bfe5cc;border-radius:12px;padding:10px 12px;margin-bottom:12px}
.topic-toolbar{display:flex;gap:6px;flex-wrap:wrap;margin-top:8px}
.chip-shortcut{font-size:.76rem;padding:4px 10px;border-radius:999px;background:#fff;border:1px solid var(--line);color:var(--green-deep);cursor:pointer}
.chip-shortcut:hover{background:var(--green-soft)}
.add-row{display:flex;gap:8px;margin-top:8px;flex-wrap:wrap}
.add-row input,.add-row textarea{flex:1;min-width:120px;padding:9px 11px;border:1px solid var(--line);border-radius:10px;background:#fff}
.add-row textarea{min-height:60px;resize:vertical}
.add-row button,.setting-block>button,.btn-primary{padding:9px 16px;border-radius:10px;background:var(--green);color:#fff;font-weight:700}
.setting-divider{height:1px;background:var(--line);margin:14px 0 0}
.btn-danger{background:#fff0f0;color:#c0495b;padding:9px 16px;border-radius:10px;font-weight:700;margin-top:10px}
details{margin-top:8px}
details summary{cursor:pointer;color:var(--green-deep);font-size:.85rem;font-weight:600}
details textarea{width:100%;margin-top:8px;min-height:70px;padding:9px;border:1px solid var(--line);border-radius:10px}

footer{text-align:center;color:var(--muted);font-size:.78rem;margin-top:10px}

/* ---------- 飘心动画 ---------- */
.heart-float{position:absolute;font-size:1.4rem;pointer-events:none;animation:floatUp 1.2s ease forwards}
@keyframes floatUp{0%{opacity:1;transform:translateY(0) scale(.8)}100%{opacity:0;transform:translateY(-60px) scale(1.3)}}
.confetti{position:fixed;inset:0;pointer-events:none;z-index:50}

/* ---------- 移动端：导航转底部 ---------- */
@media(max-width:720px){
  .shell{flex-direction:column}
  .rail{width:100%;flex-direction:row;height:auto;position:fixed;bottom:0;left:0;right:0;top:auto;z-index:30;padding:6px 0;justify-content:space-around}
  .rail-brand{display:none}
  .nav-btn{width:auto;flex:1;margin:0;padding:7px 2px;font-size:.7rem}
  .nav-btn .ico{font-size:1.25rem}
  .rail-teacher{margin-top:0;flex:1 1 0;font-size:.7rem;padding:7px 2px}
  .app{padding-bottom:70px}
  .container{padding:14px 14px 30px}
  .pet-stage{height:210px}
  .pet-wrap{width:180px;height:180px}
  .pet-svg{width:180px;height:180px}
  .pet-emoji{font-size:5rem}
}

/* ---------- 单词：单元选择 ---------- */
.unit-bar{display:flex;align-items:center;gap:10px;margin-bottom:12px;flex-wrap:wrap}
.unit-bar .unit-label{font-size:.85rem;color:var(--muted)}
.unit-bar .unit-select{padding:8px 12px;border:1px solid var(--line);border-radius:10px;background:#fff;font-size:.9rem;min-width:150px}

/* ---------- 计算题：错题来源（巩固）---------- */
.calc-item.from-wrong{border-style:dashed!important;background:var(--accent-soft)!important}
.calc-item.from-wrong .calc-tip{color:#d68910!important;font-weight:700}
.wrong-reason{font-size:.72rem;color:#c0495b;background:#fff0f0;padding:3px 8px;border-radius:8px;font-weight:600;margin-top:2px}

/* ---------- 计算题：老师批改 ---------- */
.grade-badge{font-size:.76rem;font-weight:700;padding:4px 10px;border-radius:10px;background:var(--bg);color:var(--muted);border:1px solid var(--line);align-self:flex-start;margin-top:4px}
.grade-box{margin-top:8px;display:flex;flex-direction:column;gap:8px}
.grade-btn{font-size:.8rem;padding:6px 14px;border-radius:10px;background:var(--green-soft);color:var(--green-deep);font-weight:700;align-self:flex-start}
.btn-secondary{background:#fff;border:1px solid var(--line);color:var(--muted);padding:9px 16px;border-radius:10px;font-weight:700}
.grade-form{display:flex;flex-direction:column;gap:8px;background:var(--bg);border:1px solid var(--line);border-radius:12px;padding:12px}
.grade-form label{font-size:.85rem;display:inline-flex;align-items:center;gap:5px}
.grade-form select,.grade-form input[type=text]{padding:8px 10px;border:1px solid var(--line);border-radius:9px;background:#fff;width:100%}
.grade-hint{font-size:.78rem;color:var(--muted)}
.grade-problems{display:flex;flex-direction:column;gap:4px;border-top:1px dashed var(--line);padding-top:8px;margin-top:2px}
.grade-problem{font-size:.82rem;display:inline-flex;align-items:center;gap:6px;background:#fff;border:1px solid var(--line);border-radius:9px;padding:5px 9px;cursor:pointer}
.grade-problem input{width:16px;height:16px;accent-color:var(--green)}
.grade-comment{font-size:.8rem;color:var(--muted);background:var(--blue-soft);padding:6px 10px;border-radius:9px}

/* ---------- 语文：译文 / 主旨 / 字词 ---------- */
.chinese-extra{margin-top:8px}
.chinese-translation,.chinese-theme{font-size:.9rem;line-height:1.8;color:var(--ink);padding:6px 2px}
.chinese-theme{color:var(--green-deep);font-weight:600}
.chinese-words{display:flex;flex-direction:column;gap:6px;padding:6px 2px}
.word-item{font-size:.9rem;background:var(--bg);border:1px solid var(--line);border-radius:9px;padding:6px 10px;line-height:1.5}
.word-item b{color:var(--green-deep)}

/* ---------- 老师看板 ---------- */
.teacher-dashboard{}
.dash-today{display:flex;flex-wrap:wrap;gap:10px;background:var(--green-soft);color:var(--green-deep);border-radius:12px;padding:12px;font-size:.92rem;font-weight:700;margin-bottom:12px}
.dash-today>div{min-width:90px}
.dash-history{overflow:auto}
.dash-table{width:100%;border-collapse:collapse;font-size:.82rem;margin-top:6px}
.dash-table th,.dash-table td{border:1px solid var(--line);padding:7px 9px;text-align:center}
.dash-table th{background:var(--green-soft);color:var(--green-deep)}
.dash-table tbody tr:nth-child(even){background:var(--bg)}

/* ---------- 默写模式（扇贝风格） ---------- */
.dictation-page{
  display:flex;flex-direction:column;align-items:center;justify-content:center;
  min-height:calc(100vh - 160px);padding:20px 14px;
  background:linear-gradient(180deg,#f3fdfa 0%,#f0f7f4 100%);
}
.dictation-progress{font-size:.78rem;color:var(--muted);margin-bottom:18px;letter-spacing:.5px}
.dictation-stage{width:100%;max-width:420px;text-align:center;margin-bottom:28px}
.dictation-input{
  width:100%;background:transparent;border:none;border-bottom:2px solid var(--green);border-radius:0;outline:none;
  text-align:center;font-size:2.6rem;font-weight:600;color:var(--ink);
  caret-color:var(--green);padding:10px 0 10px;line-height:1.2;
  font-family:inherit;
}
/* 默写横线：清晰的书写基线，让学生清楚看到默写位置 */
.dictation-input::placeholder{color:#b9c7bf}
.dictation-hint{margin-top:14px;display:flex;flex-direction:column;align-items:center;gap:6px}
.dictation-pos{font-size:.85rem;color:var(--muted);background:var(--bg);padding:3px 10px;border-radius:999px}
.dictation-ipa{font-size:1.1rem;color:var(--green-deep);font-weight:600;cursor:pointer;padding:2px 8px;border-radius:10px;background:var(--green-soft)}
.dictation-ipa small{pointer-events:none}
.dictation-mean{font-size:1.15rem;color:#1e6fea;font-weight:700;line-height:1.6;max-width:320px;font-family:"SimSun","Songti SC","宋体",serif}
.dictation-peek{
  min-height:36px;margin-top:14px;font-size:1.4rem;font-weight:800;color:var(--green-deep);
  opacity:0;transition:opacity .15s;letter-spacing:1px
}
.dictation-peek.show{opacity:1}
.dictation-toolbar{display:flex;align-items:center;justify-content:center;gap:28px;margin-top:auto;padding-bottom:24px}
.tool-btn{
  width:58px;height:58px;border-radius:50%;background:#fff;
  box-shadow:0 4px 14px rgba(63,158,87,.14);font-size:1.45rem;
  display:flex;align-items:center;justify-content:center;
  transition:transform .12s,box-shadow .2s;color:var(--muted)
}
.tool-btn:active{transform:scale(.94)}
.tool-btn:disabled{opacity:.45;transform:none}
.tool-btn.tool-primary{color:var(--green);background:var(--green-soft);box-shadow:0 4px 14px rgba(63,158,87,.22)}
.tool-btn.tool-submit{color:#fff;background:var(--green);font-size:1.7rem;font-weight:700;box-shadow:0 4px 14px rgba(63,158,87,.35)}
.dictation-result{width:100%;max-width:420px;text-align:center;margin:14px 0 6px}
.dictation-result-ok{font-size:1rem;color:var(--green-deep);font-weight:700;margin-bottom:10px}
.dictation-result-bad{font-size:1rem;color:#c0495b;font-weight:700;margin-bottom:10px}
.dictation-result-bad b{font-size:1.15rem}
.dictation-result-actions{display:flex;gap:10px;justify-content:center;flex-wrap:wrap}

/* ---------- 单词详情（音节拆分 + 自然拼读） ---------- */
.word-detail-wrap{display:flex;flex-direction:column;align-items:center;padding:8px 4px 20px}
.word-detail-head{
  width:100%;max-width:460px;background:var(--card);border-radius:var(--radius);
  box-shadow:var(--shadow);padding:22px 18px;text-align:center;margin-bottom:16px
}
.word-detail-title{font-size:2rem;font-weight:800;color:var(--green-deep);letter-spacing:1px;line-height:1.3;word-break:break-all}
.word-detail-ipa{font-size:1.2rem;color:var(--muted);margin-top:10px;display:flex;align-items:center;justify-content:center;gap:8px}
.word-detail-ipa .speak-btn{width:34px;height:34px;font-size:1rem}
.word-detail-pos{font-size:.95rem;color:#5a6b62;margin-top:10px;line-height:1.6}
.detail-mode-bar{display:flex;gap:10px;margin-bottom:14px}
.detail-mode-btn{
  padding:7px 16px;border-radius:999px;background:#fff;border:1px solid var(--line);
  color:var(--muted);font-weight:700;font-size:.85rem
}
.detail-mode-btn.active{background:var(--green);color:#fff;border-color:var(--green)}
.syllable-grid{
  width:100%;max-width:460px;display:flex;flex-wrap:wrap;justify-content:center;gap:10px
}
.syllable-card{
  min-width:64px;background:var(--card);border:1px solid var(--line);border-radius:14px;
  padding:12px 10px;text-align:center;cursor:pointer;transition:transform .12s,box-shadow .2s,border-color .2s;
  box-shadow:0 3px 10px rgba(63,158,87,.08)
}
.syllable-card:active{transform:scale(.96)}
.syllable-card.active{border-color:var(--green);box-shadow:0 4px 14px rgba(63,158,87,.18)}
.syllable-grapheme{font-size:1.35rem;font-weight:700;line-height:1.2;margin-bottom:6px}
.syllable-phoneme{font-size:.88rem;color:var(--muted);font-family:"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif}
.syll-v{color:#e94e77}
.syll-c{color:#4a90e2}
.word-detail-foot{display:flex;gap:12px;margin-top:22px}
.word-detail-foot .btn-know,.word-detail-foot .btn-primary{padding:10px 24px;border-radius:12px;font-size:.95rem}

/* 优化中文字体与整体阅读色 */
.word-detail-pos,.chinese-translation,.chinese-theme,.word-item{
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif
}

/* ---------- 语文：单元锁定 / 掌握徽章 / 挖空默写 ---------- */
.cn-badges{display:flex;align-items:center;gap:6px;flex-wrap:wrap;justify-content:flex-end}
.cn-mastered-badge{font-size:.72rem;background:var(--green-soft);color:var(--green-deep);padding:2px 9px;border-radius:999px;font-weight:700;white-space:nowrap}
.cn-wrong-badge{font-size:.72rem;background:var(--accent-soft);color:#d68910;padding:2px 9px;border-radius:999px;font-weight:700;white-space:nowrap}
.chinese-card.mastered{border-color:var(--green);background:var(--green-soft)}
.cn-btn-row{display:flex;gap:10px;margin-top:10px;flex-wrap:wrap}
.cn-btn-master{padding:9px 16px;border-radius:11px;font-size:.9rem}
.cn-dictation-text{font-size:1.05rem;line-height:2.4;white-space:pre-wrap;font-family:"SimSun","Songti SC","宋体",serif;padding:8px 0;-webkit-user-select:none;user-select:none}
.cn-blank{
  display:inline-block;width:2.2em;text-align:center;border:none;border-bottom:2px solid var(--green);
  background:var(--green-soft);border-radius:4px 4px 0 0;font-size:1.05rem;font-family:"SimSun","Songti SC","宋体",serif;
  color:var(--ink);outline:none;margin:0 2px;padding:3px 0;transition:background .2s,border-color .2s
}
.cn-blank:focus{background:#fff;border-color:var(--green-deep);box-shadow:0 2px 8px rgba(63,158,87,.15)}
.cn-blank.wrong{border-color:#e85d5d;background:#fff0f0;color:#c0495b}
.cn-blank.correct{border-color:var(--green-deep);background:var(--green-soft);color:var(--green-deep);font-weight:700}
.cn-dictation-result{margin-top:10px;padding:10px 14px;border-radius:10px;font-weight:700;font-size:.92rem}
.cn-dictation-result.ok{background:var(--green-soft);color:var(--green-deep)}
.cn-dictation-result.bad{background:#fff0f0;color:#c0495b}

/* ---------- 宠物管理页面 ---------- */
.btn-pet-manage{background:var(--green-soft);color:var(--green-deep);font-weight:700;padding:10px 16px;border-radius:12px;border:1px solid var(--green)}
.pet-page{max-width:560px;margin:0 auto}
.pet-page-stage{
  position:relative;height:380px;display:flex;align-items:center;justify-content:center;
  background:radial-gradient(120% 90% at 50% 18%,#fbfffc 0%,#eafaf0 60%,#dff3e6 100%);
  border-radius:16px;overflow:hidden;margin-bottom:14px
}
.pet-page-wrap{width:100%;height:360px;display:flex;align-items:center;justify-content:center;position:relative}
.pet-page-wrap .pet-svg-page{
  position:relative;z-index:2;
  width:280px;height:280px;
  transition:filter .5s ease,transform .5s ease;
}
.pet-page-wrap .pet-svg-page svg{width:100%;height:100%;overflow:visible}
.pet-mode-badge{
  position:absolute;top:10px;right:10px;z-index:5;
  background:rgba(255,255,255,.9);border:1px solid var(--line);color:var(--ink);
  padding:4px 12px;border-radius:999px;font-size:.8rem;font-weight:700;box-shadow:var(--shadow)
}
.pet-acc-bar{position:absolute;bottom:8px;left:50%;transform:translateX(-50%);z-index:5;display:flex;gap:6px;flex-wrap:wrap;justify-content:center;max-width:90%}
.pet-acc-label{font-size:.75rem;color:var(--muted);background:rgba(255,255,255,.8);padding:2px 8px;border-radius:999px}
.pet-acc-chip{font-size:.75rem;background:var(--green-soft);color:var(--green-deep);padding:2px 8px;border-radius:999px;font-weight:600}
.pet-status-bar{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:14px}
.ps-item{background:var(--bg);border:1px solid var(--line);padding:5px 12px;border-radius:10px;font-size:.85rem;font-weight:700;color:var(--ink)}
.pet-meters{margin-bottom:16px}
.pet-section{margin-bottom:18px}
.pet-section-title{font-size:1rem;font-weight:800;color:var(--green-deep);margin-bottom:10px;padding-bottom:6px;border-bottom:2px solid var(--green-light)}
.pet-mode-btns{display:flex;gap:10px;margin-bottom:8px}
.pet-mode-btns button{flex:1;padding:12px;border-radius:12px;border:1px solid var(--line);background:#fff;font-weight:700;color:var(--muted);transition:all .2s}
.pet-mode-btns button.active{background:var(--green);color:#fff;border-color:var(--green)}
.pet-mode-btns button:disabled{opacity:.45;cursor:not-allowed}
.pet-mode-hint{font-size:.82rem;color:var(--muted);line-height:1.5}
.pet-reward-info{background:var(--accent-soft);border-radius:12px;padding:12px 16px;font-size:.88rem;color:#8a5a00;line-height:1.6}
.pet-reward-info b{color:#d68910}
.shop-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(130px,1fr));gap:12px}
.shop-item{background:var(--bg);border:1px solid var(--line);border-radius:14px;padding:14px;text-align:center;display:flex;flex-direction:column;gap:4px;transition:border-color .2s}
.shop-item.equipped{border-color:var(--green);background:var(--green-soft)}
.shop-icon{font-size:2.2rem}
.shop-name{font-weight:700;font-size:.9rem;color:var(--ink)}
.shop-desc{font-size:.75rem;color:var(--muted)}
.shop-price{font-size:.85rem;font-weight:700;color:#d68910}
.shop-btn{margin-top:8px;padding:8px;border-radius:10px;border:none;font-weight:700;font-size:.85rem;cursor:pointer;transition:all .2s}
.shop-btn:not(.equipped):not(.owned):not(.disabled){background:var(--green);color:#fff}
.shop-btn.owned{background:var(--green-soft);color:var(--green-deep)}
.shop-btn.equipped{background:var(--green-deep);color:#fff}
.shop-btn.disabled{background:var(--bg);color:var(--muted);cursor:not-allowed;opacity:.6}
.pet-care-btns{display:flex;gap:10px}
.pet-care-btns button{flex:1;padding:12px;border-radius:12px;font-weight:700;font-size:.95rem}
.pet-care-btns .btn-feed{background:#fff5e6;border:1px solid #ffd27d;color:#c47c00}
.pet-care-btns .btn-water{background:#e6f4fc;border:1px solid #8fd4f2;color:#2a87b8}
.pet-care-btns .btn-fert{background:#eaf6e0;border:1px solid #a8d88a;color:#4a8a2a}
.pet-care-btns button:disabled{opacity:.45;cursor:not-allowed}

/* ---------- 花园：资源 / 种子背包 / 图鉴 ---------- */
.res-pills{display:flex;gap:10px;flex-wrap:wrap;margin:10px 0}
.res-pill{background:var(--bg);border:1px solid var(--line);border-radius:999px;padding:8px 14px;font-size:.92rem;font-weight:700}
.res-pill b{color:var(--green-deep);margin-left:4px}
.res-pills-page .res-pill{font-size:1rem;padding:10px 18px}
.garden-growth-meter{margin-top:10px}
.seed-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(130px,1fr));gap:12px;margin-top:12px}
.seed-item{background:var(--bg);border:1px solid var(--line);border-radius:14px;padding:14px;text-align:center;display:flex;flex-direction:column;gap:6px}
.seed-icon{font-size:2.2rem}
.seed-name{font-weight:700;color:var(--green-deep)}
.seed-count{font-size:.85rem;color:var(--muted)}
.seed-desc{font-size:.78rem;color:var(--muted);line-height:1.4}
.seed-btn{margin-top:6px;background:var(--green);color:#fff;border:none;padding:8px;border-radius:10px;font-weight:700;cursor:pointer}
.seed-btn:disabled{opacity:.45;cursor:not-allowed}
.collection-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(130px,1fr));gap:12px;margin-top:12px}
.collection-item{background:var(--bg);border:1px solid var(--line);border-radius:14px;padding:14px;text-align:center}
.collection-item.locked{opacity:.55;filter:grayscale(.6)}
.coll-icon{font-size:2.2rem}
.coll-name{font-weight:700;color:var(--green-deep);margin:4px 0}
.coll-desc{font-size:.78rem;color:var(--muted);line-height:1.4}
.coll-count{font-size:.8rem;color:var(--green);font-weight:700;margin-top:4px}
.empty-plot{text-align:center;padding:30px 10px;color:var(--muted)}
.empty-plot-emoji{font-size:3.5rem;opacity:.6;margin-bottom:8px}
.pet-reward-info{background:var(--green-soft);border-radius:12px;padding:12px 14px;font-size:.88rem;color:var(--green-deep);line-height:1.6}

/* ---------- 登录页 ---------- */
.login-overlay{
  position:fixed;inset:0;z-index:9999;
  background:linear-gradient(135deg,var(--green-soft),var(--bg));
  display:flex;align-items:center;justify-content:center;
  padding:20px;
}
.login-overlay.hidden{display:none}
.login-box{
  background:var(--card);border-radius:24px;padding:36px 28px;
  max-width:380px;width:100%;text-align:center;
  box-shadow:0 20px 60px rgba(63,158,87,.18);
}
.login-logo{margin-bottom:12px;display:flex;justify-content:center}
.login-logo img{
  width:110px;height:110px;object-fit:contain;
  filter:drop-shadow(0 8px 16px rgba(63,158,87,.25));
  animation:loginLogoFloat 3s ease-in-out infinite;
}
@keyframes loginLogoFloat{
  0%,100%{transform:translateY(0)}
  50%{transform:translateY(-8px)}
}
.login-box h2{color:var(--green-deep);margin-bottom:6px}
.login-sub{color:var(--muted);font-size:.9rem;margin-bottom:24px}
.login-box input{
  width:100%;padding:14px 16px;border-radius:14px;border:2px solid var(--line);
  font-size:1.05rem;margin-bottom:14px;outline:none;transition:border-color .2s;
}
.login-box input:focus{border-color:var(--green)}
.login-btn{
  width:100%;padding:14px;border-radius:14px;border:none;
  background:var(--green);color:#fff;font-size:1.05rem;font-weight:700;
  cursor:pointer;transition:all .2s;
}
.login-btn:hover{background:var(--green-deep)}
.login-btn:active{transform:scale(.98)}
.login-hint{color:#e74c3c;font-size:.85rem;margin-top:8px;min-height:1.2em}
.login-divider{height:1px;background:var(--line);margin:22px 0}
.login-switch-btn{
  width:100%;padding:10px;border-radius:12px;border:1px solid var(--line);
  background:transparent;color:var(--muted);font-size:.9rem;cursor:pointer;
}
.login-switch-btn:hover{background:var(--bg)}

/* ---------- 用户标识 & 退出 ---------- */
.user-badge{
  display:inline-block;padding:3px 12px;border-radius:20px;
  background:var(--green-soft);color:var(--green-deep);
  font-size:.8rem;font-weight:600;margin-top:4px;
}
.rail-logout{
  margin-top:auto;padding:10px;border-radius:12px;border:none;
  background:#fff0f0;color:#c0495b;font-weight:700;cursor:pointer;
  font-size:.85rem;
}
.rail-logout:hover{background:#ffe0e0}

/* ---------- 学生进度仪表盘 ---------- */
.progress-table{width:100%;border-collapse:collapse;font-size:.88rem}
.progress-table th{
  background:var(--green-soft);color:var(--green-deep);
  padding:10px 8px;text-align:center;font-size:.82rem;white-space:nowrap;
}
.progress-table td{
  padding:10px 8px;text-align:center;border-bottom:1px solid var(--line);
}
.progress-table tr:hover td{background:var(--bg)}
.progress-table .name-cell{font-weight:700;text-align:left}
.progress-table .check-yes{color:var(--green-deep);font-weight:700}
.progress-table .check-no{color:#e74c3c}
.progress-table .streak-cell{color:var(--accent);font-weight:700}
.progress-detail{margin-top:16px;padding:16px;background:var(--bg);border-radius:14px}
.progress-detail h4{color:var(--green-deep);margin-bottom:10px}
.progress-detail-row{display:flex;justify-content:space-between;padding:6px 0;border-bottom:1px solid var(--line);font-size:.88rem}
.progress-detail-row:last-child{border-bottom:none}
.student-mgmt{margin-top:16px}
.student-mgmt-row{
  display:flex;align-items:center;gap:10px;padding:10px 14px;
  background:var(--bg);border-radius:12px;margin-bottom:8px;
}
.student-mgmt-row .sm-name{flex:1;font-weight:700}
.student-mgmt-row .sm-del{
  padding:6px 12px;border-radius:8px;border:none;
  background:#fff0f0;color:#c0495b;font-size:.82rem;cursor:pointer;
}
.student-add-form{display:flex;gap:8px;margin:12px 0}
.student-add-form input{
  flex:1;padding:10px 14px;border-radius:12px;border:2px solid var(--line);
  font-size:.95rem;outline:none;
}
.student-add-form input:focus{border-color:var(--green)}
.student-add-form button{
  padding:10px 20px;border-radius:12px;border:none;
  background:var(--green);color:#fff;font-weight:700;cursor:pointer;
}

/* ---------- 云同步设置 ---------- */
.cloud-config-row{display:flex;gap:8px;margin-bottom:10px;align-items:center}
.cloud-config-row label{min-width:90px;font-size:.85rem;color:var(--muted)}
.cloud-config-row input{
  flex:1;padding:8px 12px;border-radius:10px;border:1px solid var(--line);
  font-size:.85rem;outline:none;
}
.cloud-status{padding:10px 14px;border-radius:10px;font-size:.85rem;margin:10px 0}
.cloud-status.ok{background:var(--green-soft);color:var(--green-deep)}
.cloud-status.off{background:var(--bg);color:var(--muted)}
.cloud-sync-btn{
  padding:10px 20px;border-radius:12px;border:none;
  background:var(--blue);color:#fff;font-weight:700;cursor:pointer;
}
.cloud-sync-btn:disabled{opacity:.5;cursor:not-allowed}
.cloud-share{margin-top:12px;padding:12px 14px;border-radius:12px;background:var(--green-soft);border:1px dashed var(--green-deep)}
.cloud-share .cloud-link-input{width:100%;padding:9px 12px;border-radius:9px;border:1px solid var(--green-deep);background:#fff;font-size:.82rem;color:var(--green-deep);margin:8px 0}
.cloud-share .btn-secondary{margin-left:0}


/* ===== 题目放大查看器 ===== */
.img-viewer{position:fixed;inset:0;z-index:999;background:rgba(0,0,0,.82);display:flex;flex-direction:column}
.iv-stage{flex:1;overflow:auto;display:flex;align-items:center;justify-content:center;padding:16px}
.iv-img{max-width:96%;transform-origin:center center;transition:transform .15s;border-radius:8px;background:#fff;cursor:zoom-in}
.iv-bar{display:flex;gap:10px;align-items:center;justify-content:center;padding:12px;background:rgba(0,0,0,.5)}
.iv-btn{padding:8px 16px;border-radius:10px;border:none;background:#fff;color:#333;font-weight:700;font-size:1rem;cursor:pointer}
.iv-close{background:var(--green);color:#fff}
.iv-scale{color:#fff;font-weight:700;min-width:48px;text-align:center}
.calc-item{cursor:zoom-in}