/* ============================================================
 * style.css · 单词庄园(第五人格风格)
 * 暗色褐调庄园 + 羊皮纸卷宗 + 黄铜金饰
 * ============================================================ */
:root{
  --bg:      #171310;
  --panel:   #241d15;
  --panel-2: #2b2317;
  --paper:   #e9dcbe;
  --paper-ink:#2a2118;
  --gold:    #c9a55c;
  --gold-dim:#8a6d34;
  --ink:     #efe6d2;
  --ink-3:   #9b8c72;
  --ok:      #7fae6a;
  --bad:     #c25b4e;
  --warn:    #c9973f;
  --line:    #3a3024;
  --brand:   var(--gold);
  --serif:   Georgia,"Times New Roman","Songti SC","STSong","SimSun",serif;
}
*{ box-sizing:border-box; margin:0; padding:0; }
html{ -webkit-text-size-adjust:100%; }
body{
  font-family:"Noto Sans SC","PingFang SC","Microsoft YaHei",system-ui,sans-serif;
  background:
    radial-gradient(1200px 500px at 50% -80px, rgba(201,165,92,.06), transparent 60%),
    repeating-linear-gradient(135deg, rgba(255,255,255,.012) 0 2px, transparent 2px 6px),
    var(--bg);
  color:var(--ink);
  min-height:100vh;
  line-height:1.6;
  font-size:15px;
}
button{ font-family:inherit; cursor:pointer; }
input,select{ font-family:inherit; }
::selection{ background:rgba(201,165,92,.35); }

/* ---------- 顶栏 ---------- */
.topbar{
  position:sticky; top:0; z-index:50;
  background:rgba(23,19,16,.96);
  backdrop-filter:blur(6px);
  border-bottom:1px solid var(--line);
}
.topbar-inner{
  max-width:1080px; margin:0 auto; padding:10px 16px;
  display:flex; align-items:center; justify-content:space-between; gap:14px; flex-wrap:wrap;
}
.logo{ display:flex; align-items:center; gap:10px; font-family:var(--serif); font-size:19px; letter-spacing:2px; color:var(--paper); }
.logo small{ display:block; font-size:11px; color:var(--ink-3); letter-spacing:3px; font-family:"Noto Sans SC","Microsoft YaHei",sans-serif; }
.logo-badge{
  width:38px; height:38px; border-radius:50%;
  background:radial-gradient(circle at 34% 30%, #b04a3a, #6d241c 72%);
  color:var(--paper); display:flex; align-items:center; justify-content:center;
  font-family:var(--serif); font-size:20px;
  box-shadow:0 0 0 2px #4a1712, 0 0 0 3px rgba(201,165,92,.55), 0 3px 8px rgba(0,0,0,.5);
}
.nav{ display:flex; gap:4px; flex-wrap:wrap; }
.nav button{
  background:none; border:none; color:var(--ink-3);
  font-size:14px; letter-spacing:2px; padding:8px 12px;
  border-bottom:2px solid transparent;
  transition:color .15s, border-color .15s;
}
.nav button:hover{ color:var(--ink); }
.nav button.active{ color:var(--gold); border-bottom-color:var(--gold); }

/* ---------- 主体 ---------- */
.main{ max-width:1080px; margin:0 auto; padding:22px 16px 60px; }
.screen{ display:none; }
.screen.active{ display:block; }
.hidden{ display:none !important; }

h1,h2,h3,.section-title{ font-family:var(--serif); letter-spacing:1px; }

.section-title{ font-size:21px; color:var(--paper); margin:26px 0 6px; position:relative; padding-left:14px; }
.section-title::before{
  content:""; position:absolute; left:0; top:6px; bottom:6px; width:4px;
  background:linear-gradient(180deg, var(--gold), var(--gold-dim));
}
.section-desc{ color:var(--ink-3); font-size:13px; margin-bottom:14px; }

/* 维多利亚卷宗面板: 双细线 + 角括号 */
.panel{
  background:var(--panel);
  border:1px solid var(--line);
  box-shadow:inset 0 0 0 1px rgba(201,165,92,.07);
  border-radius:4px;
  padding:18px 20px;
  margin-bottom:20px;
  position:relative;
}
.panel::before, .panel::after{
  content:""; position:absolute; width:12px; height:12px; pointer-events:none;
}
.panel::before{ top:-1px; left:-1px; border-top:2px solid var(--gold-dim); border-left:2px solid var(--gold-dim); }
.panel::after{ bottom:-1px; right:-1px; border-bottom:2px solid var(--gold-dim); border-right:2px solid var(--gold-dim); }
.panel h3{ font-size:16px; color:var(--paper); margin-bottom:14px; }
.panel h3::after{ content:""; display:block; width:44px; height:2px; background:var(--gold-dim); margin-top:6px; }

.hint{ font-size:12px; color:var(--ink-3); margin-top:10px; }

/* ---------- 按钮 ---------- */
.btn{
  display:inline-block; padding:9px 20px; border-radius:3px;
  background:linear-gradient(180deg, #d3b06a, #a8823d);
  color:#221a10; border:1px solid #6d5730;
  font-size:14px; font-weight:600; letter-spacing:2px;
  transition:filter .15s, transform .05s;
}
.btn:hover{ filter:brightness(1.1); }
.btn:active{ transform:translateY(1px); }
.btn-ok{ background:linear-gradient(180deg,#8cb477,#5f8b4c); border-color:#43603a; color:#15200f; }
.btn-line{
  background:none; border:1px solid var(--gold-dim); color:var(--gold);
  padding:9px 18px; border-radius:3px; font-size:14px; letter-spacing:2px;
  transition:background .15s;
}
.btn-line:hover{ background:rgba(201,165,92,.1); }
.btn-sm{ padding:6px 14px; font-size:13px; }
.btn-danger{ border-color:var(--bad); color:var(--bad); }
.btn-danger:hover{ background:rgba(194,91,78,.12); }
.btn-row{ display:flex; gap:12px; justify-content:center; flex-wrap:wrap; margin-top:16px; }
.link-btn{
  background:none; border:1px solid var(--line); color:var(--ink-3);
  font-size:11px; padding:2px 8px; border-radius:3px; vertical-align:middle;
}
.link-btn:hover{ color:var(--gold); border-color:var(--gold-dim); }

/* ---------- 指标卡 ---------- */
.grid{ display:grid; gap:12px; }
.grid-4{ grid-template-columns:repeat(4,1fr); margin-bottom:20px; }
.metric{
  background:var(--panel); border:1px solid var(--line); border-radius:4px;
  padding:14px 16px;
}
.metric .label{ font-size:12px; color:var(--ink-3); letter-spacing:2px; }
.metric .value{ font-size:26px; font-weight:700; font-family:var(--serif); margin-top:4px; }
.metric .value em{ font-style:normal; font-size:12px; color:var(--ink-3); font-weight:400; margin-left:4px; }
.metric .value-sm{ font-size:16px; line-height:1.9; }

/* ---------- 大厅 ---------- */
.hall-hero{ display:flex; justify-content:space-between; align-items:center; gap:20px; flex-wrap:wrap; padding:24px; }
.hall-id{ display:flex; align-items:center; gap:16px; }
.seal{
  width:72px; height:72px; border-radius:50%; flex:none;
  background:radial-gradient(circle at 34% 30%, #b04a3a, #6d241c 74%);
  color:var(--paper); display:flex; align-items:center; justify-content:center;
  font-family:var(--serif); font-size:34px;
  box-shadow:0 0 0 3px #4a1712, 0 0 0 4px rgba(201,165,92,.5), 0 4px 12px rgba(0,0,0,.55);
}
.hall-name{ font-family:var(--serif); font-size:24px; color:var(--paper); letter-spacing:2px; }
.hall-tier{ color:var(--gold); font-size:15px; letter-spacing:3px; margin-top:2px; font-family:var(--serif); }
.hall-tier-sub{ color:var(--ink-3); font-size:12px; margin-top:2px; }
.hall-ring{ text-align:center; }
.ring{
  width:128px; height:128px; border-radius:50%;
  display:flex; align-items:center; justify-content:center; position:relative; margin:0 auto;
  box-shadow:0 0 0 1px var(--line), 0 6px 18px rgba(0,0,0,.4);
}
.ring-inner{
  position:absolute; inset:12px; border-radius:50%;
  background:var(--panel-2);
  display:flex; flex-direction:column; align-items:center; justify-content:center;
}
.ring-inner b{ font-size:26px; font-family:var(--serif); color:var(--paper); }
.ring-inner span{ font-size:11px; color:var(--ink-3); letter-spacing:2px; }
.hall-ring-sub{ font-size:12px; color:var(--ink-3); margin-top:8px; }

.mini-stat{ display:flex; gap:12px; flex-wrap:wrap; margin-bottom:16px; justify-content:center; }
.ms{
  background:var(--panel-2); border:1px solid var(--line); border-radius:4px;
  padding:8px 16px; font-size:13px; color:var(--ink-3); text-align:center;
}
.ms b{ font-size:20px; font-family:var(--serif); color:var(--paper); display:block; }

/* 行动指令 */
.mission-row{ display:grid; grid-template-columns:repeat(4,1fr); gap:12px; margin-bottom:22px; }
.mission{
  background:var(--panel-2); border:1px solid var(--line); border-radius:4px;
  padding:18px 14px; text-align:center; cursor:pointer;
  transition:border-color .15s, transform .15s, box-shadow .15s;
}
.mission:hover{ border-color:var(--gold-dim); transform:translateY(-2px); box-shadow:0 8px 18px rgba(0,0,0,.35); }
.m-ic{ font-size:26px; color:var(--gold); font-family:var(--serif); }
.m-t{ font-family:var(--serif); font-size:16px; color:var(--paper); letter-spacing:3px; margin-top:6px; }
.m-d{ font-size:12px; color:var(--ink-3); margin-top:4px; }

/* 每日任务 */
.task-row{ display:flex; align-items:center; gap:14px; padding:9px 0; border-bottom:1px dashed var(--line); }
.task-row:last-of-type{ border-bottom:none; }
.task-desc{ width:150px; flex:none; font-size:14px; }
.task-bar{ flex:1; height:8px; background:var(--panel-2); border-radius:5px; overflow:hidden; }
.task-bar i{ display:block; height:100%; background:linear-gradient(90deg, var(--gold-dim), var(--gold)); border-radius:5px; transition:width .3s; }
.task-right{ width:90px; flex:none; text-align:right; font-size:13px; color:var(--ink-3); }
.task-claim{ padding:4px 10px; font-size:12px; }
.task-claimed{ color:var(--ok); font-size:13px; letter-spacing:1px; }
.task-pending{ color:var(--ink-3); }

/* 单元卡片 */
.unit-list{ display:grid; grid-template-columns:repeat(2,1fr); gap:12px; }
.unit-card{
  background:var(--panel); border:1px solid var(--line); border-radius:4px;
  padding:14px 16px; cursor:pointer; position:relative;
  transition:border-color .15s, transform .15s;
}
.unit-card:hover{ border-color:var(--gold-dim); transform:translateY(-2px); }
.u-no{ font-size:11px; letter-spacing:3px; color:var(--gold); font-family:var(--serif); }
.u-title{ font-family:var(--serif); font-size:16px; color:var(--paper); margin:2px 0; }
.u-topic{ font-size:12px; color:var(--ink-3); }
.u-bar{ display:flex; justify-content:space-between; font-size:11px; color:var(--ink-3); margin:8px 0 4px; }
.prog{ height:6px; background:var(--panel-2); border-radius:4px; overflow:hidden; }
.prog i{ display:block; height:100%; background:linear-gradient(90deg, var(--gold-dim), var(--gold)); border-radius:4px; }

/* ---------- 练习通用 ---------- */
.flash-wrap{ max-width:640px; margin:0 auto; }
.center-panel{ max-width:620px; margin:0 auto; text-align:center; }
.field-label{ font-size:13px; color:var(--ink-3); margin-bottom:10px; letter-spacing:2px; }
.mode-bar{ display:flex; }
select{
  background:var(--panel-2); color:var(--paper); border:1px solid var(--gold-dim);
  padding:8px 12px; border-radius:3px; font-size:14px; min-width:240px;
}
.progress-top{ display:flex; align-items:center; gap:12px; margin-bottom:14px; }
.unit-tag{
  background:var(--panel-2); border:1px solid var(--gold-dim); color:var(--gold);
  font-size:12px; padding:2px 10px; border-radius:3px; letter-spacing:1px; flex:none;
}
.pbar{ flex:1; height:8px; background:var(--panel-2); border-radius:5px; overflow:hidden; }
.pbar i{ display:block; height:100%; background:linear-gradient(90deg, var(--gold-dim), var(--gold)); border-radius:5px; }
.progress-top span{ font-size:13px; color:var(--ink-3); flex:none; }

/* 羊皮纸卡片: 双层金框 */
.flash-card{
  background:var(--paper); color:var(--paper-ink);
  border:2px solid #6d5730; border-radius:6px;
  box-shadow:inset 0 0 0 5px var(--paper), inset 0 0 0 7px #b49b6a, 0 12px 30px rgba(0,0,0,.5);
  padding:34px 26px; text-align:center; cursor:pointer; position:relative;
  min-height:230px; display:flex; flex-direction:column; align-items:center; justify-content:center;
}
.cipher-tip{ font-size:11px; letter-spacing:4px; color:#8a764c; margin-bottom:10px; font-family:var(--serif); }
.word-en{ font-family:var(--serif); font-size:36px; font-weight:700; letter-spacing:1px; word-break:break-word; }
.word-ph{ color:#6d5f42; font-size:16px; margin-top:6px; }
.word-zh{ font-size:19px; margin-top:10px; font-weight:600; }
.word-ex{ margin-top:14px; font-size:14px; color:#4d4128; border-top:1px dashed #b49b6a; padding-top:12px; max-width:440px; }
.speak-btn{
  position:absolute; top:14px; right:14px;
  width:36px; height:36px; border-radius:50%;
  background:var(--panel-2); color:var(--gold); border:1px solid var(--gold-dim);
  font-size:13px;
}
.speak-btn:hover{ background:var(--gold); color:#221a10; }
.flip-tip{ margin-top:16px; font-size:12px; color:#8a764c; letter-spacing:2px; }

.quality-bar{ display:flex; gap:10px; justify-content:center; margin-top:16px; flex-wrap:wrap; opacity:0; pointer-events:none; transition:opacity .2s; }
.quality-bar.show{ opacity:1; pointer-events:auto; }
.qbtn{
  padding:10px 18px; border-radius:3px; font-size:14px; letter-spacing:2px;
  border:1px solid var(--gold-dim); background:var(--panel-2); color:var(--paper);
  transition:filter .15s;
}
.qbtn:hover{ filter:brightness(1.2); }
.qbtn.bad{ border-color:#6e3a33; color:#e08a7e; }
.qbtn.good{ border-color:#4c6b40; color:#a5c996; }
.flash-nav{ text-align:center; margin-top:12px; }

/* 听写 */
.spell-box{ cursor:default; }
.q-word-zh{ font-size:22px; font-weight:600; margin-top:8px; }
.q-sub{ font-size:12px; color:#8a764c; margin-top:8px; letter-spacing:1px; }
.spell-input{
  margin-top:18px; width:100%; max-width:360px;
  background:var(--panel-2); border:1px solid var(--gold-dim); border-radius:3px;
  color:var(--paper); font-size:20px; padding:12px 16px; text-align:center;
  font-family:var(--serif); letter-spacing:2px;
}
.spell-input:focus{ outline:none; border-color:var(--gold); box-shadow:0 0 0 2px rgba(201,165,92,.25); }
.spell-input.correct{ border-color:var(--ok); box-shadow:0 0 0 2px rgba(127,174,106,.3); }
.spell-input.wrong{ border-color:var(--bad); box-shadow:0 0 0 2px rgba(194,91,78,.3); }

/* 排位赛 */
.quiz-top{ display:flex; align-items:center; margin-bottom:14px; }
.quiz-q{
  background:var(--panel-2); border:1px solid var(--line); border-radius:4px;
  padding:26px 22px; text-align:center; position:relative;
}
.q-word{ font-family:var(--serif); font-size:34px; color:var(--paper); }
.options{ display:grid; grid-template-columns:1fr 1fr; gap:10px; margin-top:18px; }
.option{
  background:var(--panel); border:1px solid var(--line); border-radius:4px;
  color:var(--ink); padding:12px 14px; font-size:15px; text-align:left;
  transition:border-color .15s, background .15s;
}
.option:hover{ border-color:var(--gold-dim); }
.option.correct{ border-color:var(--ok); color:var(--ok); background:rgba(127,174,106,.08); }
.option.wrong{ border-color:var(--bad); color:var(--bad); background:rgba(194,91,78,.08); }
.option:disabled{ cursor:default; }

/* 结果页 */
.result-banner{
  background:var(--panel); border:1px solid var(--line); border-radius:4px;
  padding:34px 24px; text-align:center; position:relative;
}
.result-banner::before, .result-banner::after{ content:""; position:absolute; width:14px; height:14px; }
.result-banner::before{ top:-1px; left:-1px; border-top:2px solid var(--gold-dim); border-left:2px solid var(--gold-dim); }
.result-banner::after{ bottom:-1px; right:-1px; border-bottom:2px solid var(--gold-dim); border-right:2px solid var(--gold-dim); }
.result-banner h2{ font-size:22px; color:var(--paper); margin:8px 0; }
.result-banner p{ color:var(--ink-3); font-size:14px; }
.result-banner .big{ font-size:40px; margin-bottom:6px; }
.result-tag{
  display:inline-block; padding:4px 18px; border:1px solid; border-radius:2px;
  font-family:var(--serif); letter-spacing:6px; font-size:15px; transform:rotate(-2deg);
}
.tag-win{ color:var(--ok); border-color:var(--ok); }
.tag-lose{ color:var(--bad); border-color:var(--bad); }
.pts{ margin-top:8px; font-size:14px; }
.pts b{ color:var(--gold); font-size:18px; }
.verdict{ margin-top:6px; font-size:13px !important; }
.score-ring{
  width:120px; height:120px; border-radius:50%; margin:10px auto;
  display:flex; align-items:center; justify-content:center;
}
.score-ring-inner{
  width:88px; height:88px; border-radius:50%; background:var(--panel-2);
  display:flex; align-items:center; justify-content:center;
  font-weight:700; font-size:22px; font-family:var(--serif); color:var(--paper);
}

/* ---------- 疑案卷宗 ---------- */
.wrong-list{ display:flex; flex-direction:column; gap:10px; }
.wrong-item{
  display:flex; align-items:center; gap:14px;
  background:var(--panel-2); border:1px solid var(--line); border-radius:4px;
  padding:12px 16px;
}
.wk-word{ font-family:var(--serif); font-size:19px; color:var(--paper); width:170px; flex:none; }
.wk-ph{ font-weight:400; font-size:12px; color:var(--ink-3); }
.wk-meaning{ flex:1; font-size:14px; }
.wk-ex{ font-size:12px; color:var(--ink-3); margin-top:2px; }
.wk-count{
  flex:none; font-size:12px; color:var(--bad);
  border:1px solid #6e3a33; padding:2px 10px; border-radius:3px; letter-spacing:1px;
}
.empty-state{ text-align:center; padding:40px 20px; }
.empty-state .ic{ font-size:34px; color:var(--gold); font-family:var(--serif); }
.empty-state h3{ margin-top:10px; }
.empty-state p{ color:var(--ink-3); font-size:13px; margin-top:6px; }

/* ---------- 档案室 ---------- */
.bars{ display:flex; align-items:flex-end; gap:5px; height:130px; padding-top:18px; }
.bar-col{ flex:1; display:flex; flex-direction:column; align-items:center; justify-content:flex-end; height:100%; }
.bar-val{ font-size:10px; color:var(--ink-3); margin-bottom:2px; min-height:14px; }
.bar{ width:100%; max-width:26px; background:linear-gradient(180deg, var(--gold), var(--gold-dim)); border-radius:2px 2px 0 0; }
.bar-day{ font-size:10px; color:var(--ink-3); margin-top:4px; }
.legend{ display:flex; gap:14px; flex-wrap:wrap; font-size:11px; color:var(--ink-3); margin-top:12px; align-items:center; }
.dot{ display:inline-block; width:10px; height:10px; border-radius:2px; margin-right:4px; vertical-align:-1px; }
.dot-gold{ background:linear-gradient(180deg, var(--gold), var(--gold-dim)); }
.heat{ display:grid; grid-template-columns:repeat(7,1fr); gap:5px; }
.hcell{ aspect-ratio:1; border-radius:3px; }
.h0{ background:var(--panel-2); border:1px solid var(--line); }
.h1{ background:#4a3a1f; }
.h2{ background:#6d5730; }
.h3{ background:#9c7c3f; }
.h4{ background:var(--gold); }
.au-row{ display:flex; align-items:center; gap:12px; padding:6px 0; }
.au-name{ width:250px; flex:none; font-size:13px; color:var(--ink); white-space:nowrap; overflow:hidden; text-overflow:ellipsis; }
.au-row .prog{ flex:1; }
.au-num{ width:60px; flex:none; text-align:right; font-size:12px; color:var(--ink-3); }
.sess-table{ width:100%; border-collapse:collapse; font-size:13px; }
.sess-table th{ text-align:left; color:var(--ink-3); font-weight:400; font-size:12px; letter-spacing:2px; padding:6px 8px; border-bottom:1px solid var(--line); }
.sess-table td{ padding:7px 8px; border-bottom:1px dashed var(--line); }
.archive-ops .btn-row{ margin-bottom:4px; }

/* ---------- 页脚 / 提示 ---------- */
.footer{ text-align:center; color:var(--ink-3); font-size:12px; padding:30px 16px 40px; letter-spacing:1px; }
.toast{
  position:fixed; left:50%; bottom:36px; transform:translateX(-50%) translateY(20px);
  background:var(--panel); color:var(--paper); border:1px solid var(--gold-dim);
  padding:10px 22px; border-radius:3px; font-size:14px; letter-spacing:1px;
  opacity:0; pointer-events:none; transition:opacity .2s, transform .2s;
  box-shadow:0 8px 24px rgba(0,0,0,.5); z-index:99; max-width:86vw;
}
.toast.show{ opacity:1; transform:translateX(-50%) translateY(0); }
.toast.ok{ border-color:var(--ok); }
.toast.bad{ border-color:var(--bad); }

/* ---------- 今日侦探计划 ---------- */
.plan-row{ display:flex; align-items:center; gap:12px; padding:9px 0; border-bottom:1px dashed var(--line); }
.plan-row:last-of-type{ border-bottom:none; }
.plan-row.done .plan-t, .plan-row.done .plan-stat{ color:var(--ok); }
.plan-no{ width:26px; flex:none; text-align:center; color:var(--gold); font-family:var(--serif); font-size:15px; }
.plan-t{ flex:1; font-size:14px; }
.plan-stat{ width:110px; flex:none; text-align:right; font-size:12px; color:var(--ink-3); }
.plan-row .btn-sm{ flex:none; }
.plan-level{ font-size:14px; color:var(--gold); letter-spacing:1px; margin-bottom:4px; font-family:var(--serif); }

/* ---------- 音标教室 ---------- */
.ph-grid{ display:grid; grid-template-columns:repeat(3,1fr); gap:12px; }
.ph-card{
  background:var(--panel-2); border:1px solid var(--line); border-radius:4px;
  padding:14px 14px 12px; position:relative;
}
.ph-card::before{ content:""; position:absolute; top:-1px; left:-1px; width:9px; height:9px; border-top:2px solid var(--gold-dim); border-left:2px solid var(--gold-dim); }
.ph-sym{ font-family:var(--serif); font-size:30px; color:var(--gold); line-height:1.1; }
.ph-name{ font-size:12px; color:var(--paper); letter-spacing:2px; margin:2px 0 6px; }
.ph-tip{ font-size:12px; color:var(--ink-3); line-height:1.55; }
.ph-egs{ display:flex; flex-wrap:wrap; gap:6px; margin-top:10px; }
.ph-eg{
  background:var(--panel); border:1px solid var(--gold-dim); color:var(--gold);
  font-size:12px; padding:3px 10px; border-radius:12px; letter-spacing:1px;
}
.ph-eg:hover{ background:var(--gold); color:#221a10; }
.ph-rules{ display:grid; grid-template-columns:repeat(2,1fr); gap:12px; }
.ph-rule{ background:var(--panel-2); border:1px solid var(--line); border-radius:4px; padding:14px 16px; }
.pr-t{ font-family:var(--serif); font-size:15px; color:var(--paper); margin-bottom:4px; }
.pr-d{ font-size:12px; color:var(--ink-3); line-height:1.55; }
.pr-eg{ margin-top:8px; display:flex; flex-wrap:wrap; gap:6px; }
.pr-badge{ font-size:12px; color:var(--gold); border:1px dashed var(--gold-dim); padding:2px 8px; border-radius:3px; }

/* ---------- 响应式 ---------- */
@media (max-width: 760px){
  .grid-4{ grid-template-columns:repeat(2,1fr); }
  .mission-row{ grid-template-columns:repeat(2,1fr); }
  .unit-list{ grid-template-columns:1fr; }
  .options{ grid-template-columns:1fr; }
  .hall-hero{ flex-direction:column; text-align:center; }
  .hall-id{ flex-direction:column; }
  .au-name{ width:110px; }
  .wk-word{ width:110px; font-size:16px; }
  .wrong-item{ flex-wrap:wrap; }
  .task-desc{ width:110px; font-size:13px; }
  .task-right{ width:74px; }
  .topbar-inner{ padding:8px 10px; }
  .nav{ width:100%; overflow-x:auto; flex-wrap:nowrap; }
  .nav button{ flex:none; padding:8px 10px; }
  .word-en{ font-size:28px; }
  .ph-grid{ grid-template-columns:repeat(2,1fr); }
  .ph-rules{ grid-template-columns:1fr; }
  .plan-stat{ width:84px; }
}

/* ===== 词包切换(九年级同步 / 八年级补学) ===== */
.bank-switch{ display:flex; gap:10px; margin:2px 0 10px; flex-wrap:wrap; }
.bank-pill{
  background:transparent; border:1px solid var(--line); color:var(--ink);
  border-radius:999px; padding:7px 18px; font-size:13px; letter-spacing:1px;
  cursor:pointer; opacity:.72; transition:all .15s;
}
.bank-pill.on{
  border-color:var(--gold); color:var(--gold); opacity:1;
  background:rgba(201,165,92,.08);
}
.bank-chip{
  display:inline-block; border:1px solid var(--line); border-radius:999px;
  padding:1px 10px; font-size:12px; color:var(--warn); margin-left:6px;
  vertical-align:1px;
}