/* ===================================================================
   知识闯关 · 通用框架  base.css
   重点：移动端紧凑排版（选项横排 / 缩小间距 / 放大字号）
   =================================================================== */
:root{
  --bg1:#1b1013; --card:#fffaf5; --ink:#2b1d18;
  --red:#e23b2e; --orange:#f0803a; --amber:#f5b942; --green:#2e9e5b;
  --blue:#2f6fb0; --line:#ead9cf; --soft:#fff3e8;
  --accent:#7b4bd1; --accent2:#a06be0;
  --maxw:860px;
  --gap:8px;
}
*{box-sizing:border-box;margin:0;padding:0}
html{-webkit-text-size-adjust:100%}
body{
  font-family:"Microsoft YaHei","PingFang SC","Hiragino Sans GB",system-ui,-apple-system,sans-serif;
  background:radial-gradient(1200px 600px at 50% -10%,#3a1a1f,var(--bg1));
  color:var(--ink);min-height:100vh;
  padding:6px;display:flex;justify-content:center;
  overscroll-behavior-y:contain;
}
.wrap{width:100%;max-width:var(--maxw)}
.hidden{display:none !important}

/* ---------- 顶栏（移动端极简） ---------- */
.topbar{
  display:flex;align-items:center;justify-content:space-between;gap:6px;
  color:#ffe9d6;font-size:12px;margin-bottom:6px;white-space:nowrap;
}
.topbar .brand{overflow:hidden;text-overflow:ellipsis;font-weight:700}
.topbar .hud{display:flex;align-items:center;gap:8px;flex:0 0 auto;
  background:rgba(255,255,255,.08);padding:4px 9px;border-radius:16px}
.topbar .hud b{color:var(--amber)}
.topbar .lvtag{color:#d9b8ff}

/* ---------- 卡片 / 屏幕 ---------- */
.screen{background:var(--card);border-radius:14px;padding:12px;
  box-shadow:0 12px 34px rgba(0,0,0,.38);margin-top:8px}
h1{color:#fff;text-align:center;font-size:19px;letter-spacing:.5px}
h1 small{display:block;font-size:11.5px;color:#ffcaa8;font-weight:400;margin-top:4px;line-height:1.5}
.center{text-align:center}

/* ---------- 按钮 ---------- */
.btn{display:inline-block;border:none;cursor:pointer;border-radius:10px;padding:10px 18px;
  font-size:15px;font-weight:700;color:#fff;text-decoration:none;
  background:linear-gradient(135deg,var(--accent),var(--accent2));transition:.15s}
.btn:hover{transform:translateY(-1px);box-shadow:0 8px 16px rgba(123,75,209,.32)}
.btn.ghost{background:#f3e4d8;color:#7a4a35}
.btn.sm{padding:7px 13px;font-size:13px}
.btn[disabled]{opacity:.5;pointer-events:none}

/* ---------- 选择页 ---------- */
.pick-block{margin-top:12px}
.pick-label{font-size:13px;font-weight:700;color:#7a4a35;margin-bottom:6px}
.chips{display:flex;flex-wrap:wrap;gap:6px}
.chip{border:2px solid var(--line);background:#fff;border-radius:10px;padding:8px 11px;
  cursor:pointer;font-size:13.5px;line-height:1.3;text-align:left;transition:.12s}
.chip .cs{display:block;font-size:11px;color:#a08474;margin-top:2px}
.chip.on{border-color:var(--accent);background:#f7f1ff;box-shadow:0 3px 10px rgba(123,75,209,.16)}
.modes{display:grid;grid-template-columns:1fr;gap:7px}
.mode{display:flex;gap:9px;align-items:flex-start;border:2px solid var(--line);background:#fff;
  border-radius:11px;padding:9px 11px;cursor:pointer;transition:.12s;text-align:left}
.mode .ic{font-size:21px;line-height:1.1;flex:0 0 auto}
.mode .nm{font-weight:700;font-size:14.5px}
.mode .ds{font-size:11.5px;color:#8a6c5d;line-height:1.4;margin-top:2px}
.mode.on{border-color:var(--accent);background:#f7f1ff}
.tip{font-size:11px;color:#9a7d63;text-align:center;margin-top:10px;line-height:1.6}
.tip code{background:#f7f1ea;border:1px solid var(--line);border-radius:5px;padding:1px 4px;font-size:11px}

/* ---------- 题目区（移动端核心优化） ---------- */
.qcard{background:var(--soft);border:1px solid var(--line);border-radius:12px;
  padding:9px 11px;margin-bottom:7px}
.qcard .lvno{display:inline-block;background:var(--accent);color:#fff;border-radius:7px;
  padding:1px 8px;font-size:11.5px;font-weight:700;margin-bottom:5px}
.qcard .qt{font-size:clamp(15px,4.3vw,17.5px);font-weight:700;line-height:1.42}
/* 选项：单列横排（徽标 + 文字一行），移动端不再竖高留白 */
.opts{display:grid;grid-template-columns:1fr;gap:5px;margin-top:7px}
.opt{display:flex;align-items:center;gap:8px;background:#fff;border:2px solid var(--line);
  border-radius:9px;padding:7px 9px;font-size:clamp(14px,4vw,16px);line-height:1.35}
.opt .tag{flex:0 0 auto;width:23px;height:23px;display:grid;place-items:center;
  background:var(--red);color:#fff;border-radius:7px;font-size:12.5px;font-weight:800}
.opt .txt{flex:1;min-width:0}
.opt.clickable{cursor:pointer;transition:.12s}
.opt.clickable:active{transform:scale(.99)}
.opt.clickable:hover{border-color:var(--accent)}
.opt.right{border-color:var(--green);background:#e7f7ee}
.opt.wrong{border-color:var(--red);background:#fdeaea;animation:shake .3s}
@keyframes shake{0%,100%{transform:translateX(0)}25%{transform:translateX(-4px)}75%{transform:translateX(4px)}}
@keyframes dropIn{0%{transform:translateY(-14px);opacity:0}100%{transform:translateY(0);opacity:1}}
.qcard.drop{animation:dropIn .3s ease-out both}

/* 桌面端：两列，仍保持横排单行阅读 */
@media(min-width:760px){
  body{padding:12px}
  .screen{padding:16px}
  .opts{grid-template-columns:1fr 1fr;gap:7px}
  .modes{grid-template-columns:1fr 1fr 1fr}
  h1{font-size:22px}
}

/* ---------- 舞台（气球 / 射击） ---------- */
.stage{position:relative;border-radius:12px;overflow:hidden;
  height:clamp(250px,42vh,380px);
  background:linear-gradient(180deg,#20121a,#120a0e);border:1px solid #3a232b;
  touch-action:none;user-select:none}
.stage.sky{background:linear-gradient(180deg,#dff0ff 0%,#eef8ff 60%,#ffffff 100%);border-color:#bcd9ef}
.stage.plain{background:linear-gradient(180deg,#f7f1ea,#efe6dc);border-color:var(--line)}
#game{display:block;width:100%;height:100%;cursor:crosshair}
.hint{position:absolute;top:5px;left:6px;right:6px;text-align:center;color:#ffd9b0;
  font-size:11px;line-height:1.35;pointer-events:none;text-shadow:0 1px 3px rgba(0,0,0,.6)}
.stage.sky .hint,.stage.plain .hint{color:#6b4a2f;text-shadow:none}
.reason{position:absolute;left:6px;right:6px;bottom:6px;
  background:#fff7ec;border:1px dashed var(--amber);border-radius:10px;
  padding:8px 10px;font-size:12.5px;line-height:1.5;color:#6b4a2f;display:none;
  box-shadow:0 6px 18px rgba(0,0,0,.28);max-height:52%;overflow:auto}
.reason b{color:var(--green)}
.reason .src{display:block;margin-top:4px;color:#9a7d63;font-size:11px}

/* ---------- 气球 ---------- */
.balloon{position:absolute;left:0;top:0;width:78px;
  transform:translate(-50%,-50%);cursor:pointer;will-change:transform;text-align:center}
.balloon .bd{position:relative;width:74px;height:84px;margin:0 auto;
  border-radius:50% 50% 46% 46%;display:grid;place-items:center;color:#fff;
  box-shadow:inset -9px -11px 20px rgba(0,0,0,.2),0 4px 10px rgba(0,0,0,.12)}
.balloon .bd::after{content:"";position:absolute;bottom:-6px;left:50%;transform:translateX(-50%);
  border-left:6px solid transparent;border-right:6px solid transparent;
  border-top:9px solid var(--c,#e23b2e)}
.balloon .lt{font-size:19px;font-weight:800;line-height:1}
.balloon .kw{font-size:10px;line-height:1.15;margin-top:2px;opacity:.96;padding:0 5px;
  word-break:break-all}
.balloon .hl{position:absolute;top:14px;left:14px;width:14px;height:20px;border-radius:50%;
  background:rgba(255,255,255,.45);filter:blur(2px)}
@keyframes boom{0%{transform:translate(-50%,-50%) scale(1);opacity:1}
  60%{transform:translate(-50%,-50%) scale(1.5);opacity:.7}
  100%{transform:translate(-50%,-50%) scale(1.9);opacity:0}}
.balloon.boom{animation:boom .42s ease-out forwards}
@keyframes burst{0%{transform:translate(-50%,-50%) scale(1)}100%{transform:translate(-50%,-50%) scale(.4);opacity:0}}
.balloon.burst{animation:burst .3s ease-in forwards}

/* ---------- 报告 ---------- */
.rep-row{display:flex;justify-content:space-between;gap:9px;padding:6px 0;
  border-bottom:1px solid var(--line);font-size:13px;line-height:1.45}
.rep-row .ans{color:var(--green);font-weight:700;flex:0 0 auto}
.rep-row .an{color:#8a6c5d;font-size:12px;flex:1;line-height:1.42}
.big{font-size:26px;font-weight:800;color:var(--accent);text-align:center;margin:4px 0}
.rate{display:flex;justify-content:center;gap:6px;margin:8px 0 2px}
.rate i{font-size:26px;cursor:pointer;filter:grayscale(1);opacity:.45;transition:.12s;font-style:normal}
.rate i.on{filter:none;opacity:1;transform:scale(1.08)}
.bar{display:flex;gap:7px;justify-content:center;margin-top:10px;flex-wrap:wrap}
.kbd{display:inline-block;background:#fff;border:1px solid var(--line);border-bottom-width:2px;
  border-radius:5px;padding:1px 6px;font-size:11px;color:#7a4a35}

/* ---------- 吐司 ---------- */
.toast{position:fixed;left:50%;bottom:22px;transform:translateX(-50%) translateY(16px);
  background:#2b1d18;color:#fff;padding:8px 15px;border-radius:18px;opacity:0;
  transition:.22s;pointer-events:none;font-size:13px;z-index:50}
.toast.show{opacity:1;transform:translateX(-50%) translateY(0)}

/* ---------- 对比看板 ---------- */
table.cmp{width:100%;border-collapse:collapse;font-size:12.5px;margin-top:8px}
table.cmp th,table.cmp td{border:1px solid var(--line);padding:6px 7px;text-align:center}
table.cmp th{background:#f7f1ea;font-size:12px;color:#7a4a35}
table.cmp td.name{text-align:left;font-weight:700}
.bars{margin-top:10px}
.bars .row{margin-bottom:7px}
.bars .lb{font-size:12px;color:#7a4a35;display:flex;justify-content:space-between}
.bars .tr{height:9px;background:#f0e6dc;border-radius:6px;overflow:hidden;margin-top:2px}
.bars .fl{height:100%;border-radius:6px;background:linear-gradient(90deg,var(--accent),var(--accent2))}
.note{font-size:12px;color:#8a6c5d;line-height:1.6}
h2{font-size:15px;color:#7a4a35;margin:12px 0 4px}
ul.dot{margin:4px 0 0 16px;font-size:12.5px;line-height:1.65;color:#6b4a2f}