/* EJU 线上答题 · 样式
 * 设计目标：手机可读（可调字号）、平板/电脑分栏、考试氛围、状态一眼可见
 */
:root{
  --bg:#f4f6f9; --card:#ffffff; --ink:#182230; --ink2:#5b6b7f; --line:#d9e0e9;
  --brand:#1d4ed8; --brand-soft:#e8efff; --ok:#0f9d58; --ok-soft:#e6f6ee;
  --warn:#c77700; --warn-soft:#fff4e0; --bad:#d93025; --bad-soft:#fdecea;
  --radius:12px; --fs:17px;
  --mono:"SFMono-Regular",Menlo,Consolas,monospace;
}
*{box-sizing:border-box}
html,body{margin:0;padding:0}
body{
  background:var(--bg); color:var(--ink);
  font-family:-apple-system,BlinkMacSystemFont,"Hiragino Sans","Hiragino Kaku Gothic ProN",
    "Yu Gothic","Noto Sans JP","PingFang SC","Microsoft YaHei",sans-serif;
  font-size:var(--fs); line-height:1.75; -webkit-text-size-adjust:100%;
}
button{font:inherit;cursor:pointer}
a{color:var(--brand)}

/* ---------- 顶栏 ---------- */
.topbar{
  position:sticky; top:0; z-index:50; background:#fff; border-bottom:1px solid var(--line);
  display:flex; align-items:center; gap:10px; padding:8px 12px; flex-wrap:wrap;
}
.topbar .title{font-weight:700; font-size:15px; flex:1; min-width:120px}
.topbar .title small{display:block; font-weight:400; color:var(--ink2); font-size:12px}
.chip{
  display:inline-flex; align-items:center; gap:5px; padding:3px 9px; border-radius:99px;
  font-size:12px; font-weight:600; border:1px solid var(--line); background:#fff; color:var(--ink2);
  white-space:nowrap;
}
.chip.ok{background:var(--ok-soft); border-color:#b7e2cb; color:#0b6b3d}
.chip.warn{background:var(--warn-soft); border-color:#f0d3a1; color:#8a5200}
.chip.bad{background:var(--bad-soft); border-color:#f3c2bd; color:#a3261c}
.chip.clock{background:#eef2f7; color:#33465c; font-variant-numeric:tabular-nums}

/* ---------- 进度条 ---------- */
.pbar{position:sticky; top:0; z-index:49; height:4px; background:#dfe6ef}
.pbar > i{display:block; height:100%; width:0; background:linear-gradient(90deg,#2563eb,#0ea5e9); transition:width .25s}

/* ---------- 主体 ---------- */
.wrap{max-width:1080px; margin:0 auto; padding:12px 12px 96px}
.card{background:var(--card); border:1px solid var(--line); border-radius:var(--radius); padding:14px}
.card + .card{margin-top:12px}
h1{font-size:20px; margin:0 0 6px}
h2{font-size:17px; margin:0 0 8px}
.muted{color:var(--ink2); font-size:14px}
.row{display:flex; gap:10px; align-items:center; flex-wrap:wrap}
.spacer{flex:1}
.hidden{display:none !important}

/* ---------- 按钮 ---------- */
.btn{
  border:1px solid var(--line); background:#fff; color:var(--ink); border-radius:10px;
  padding:9px 14px; font-weight:600; font-size:15px;
}
.btn:hover{background:#f7f9fc}
.btn.primary{background:var(--brand); border-color:var(--brand); color:#fff}
.btn.primary:hover{filter:brightness(1.06)}
.btn.ghost{background:transparent; border-color:transparent; color:var(--brand)}
.btn.small{padding:5px 10px; font-size:13px; border-radius:8px}
.btn.danger{color:var(--bad); border-color:#f3c2bd}
.btn:disabled{opacity:.45; cursor:not-allowed}

/* ---------- 分区标签 ---------- */
.tabs{display:flex; gap:6px; overflow-x:auto; padding:2px 0 8px; -webkit-overflow-scrolling:touch}
.tabs button{
  border:1px solid var(--line); background:#fff; border-radius:99px; padding:7px 14px;
  font-size:14px; font-weight:600; color:var(--ink2); white-space:nowrap;
}
.tabs button.on{background:var(--brand); border-color:var(--brand); color:#fff}
.tabs button .n{font-size:12px; opacity:.8; margin-left:4px}

/* ---------- 文章 ---------- */
.passage{white-space:pre-wrap; word-break:break-word; line-height:2.0; letter-spacing:.01em}
.passage.compact{max-height:210px; overflow:hidden; position:relative}
.passage.compact::after{content:""; position:absolute; left:0; right:0; bottom:0; height:56px;
  background:linear-gradient(to bottom, rgba(255,255,255,0), #fff)}
.src{font-size:13px; color:var(--ink2); margin-top:6px}
.foot{font-size:14px; color:#3d4b5c; margin-top:10px; padding-left:1em; text-indent:-1em}
.lead{font-weight:600; margin-bottom:8px}
.daimon-tag{display:inline-block; background:#eef2f7; color:#33465c; border-radius:6px;
  padding:1px 8px; font-size:13px; font-weight:700; margin-right:8px; letter-spacing:.06em}

/* ---------- 选择肢 ---------- */
.opts{list-style:none; margin:12px 0 0; padding:0}
.opts li{margin-bottom:9px}
.opt{
  display:flex; gap:10px; align-items:flex-start; width:100%; text-align:left;
  border:1.5px solid var(--line); background:#fff; border-radius:11px; padding:11px 13px;
  line-height:1.7;
}
.opt:hover{border-color:#b9c9e0; background:#fbfcfe}
.opt .num{
  flex:0 0 26px; height:26px; border-radius:50%; background:#eef2f7; color:#33465c;
  display:flex; align-items:center; justify-content:center; font-weight:700; font-size:14px;
}
.opt.on{border-color:var(--brand); background:var(--brand-soft)}
.opt.on .num{background:var(--brand); color:#fff}
.opt.mark{border-color:#f0a23c; background:#fff8ec}
.opt.mark .num{background:#f0a23c; color:#fff}

/* ---------- 答题卡 ---------- */
.sheet{display:grid; grid-template-columns:repeat(auto-fill,minmax(46px,1fr)); gap:7px}
.sheet button{
  border:1.5px solid var(--line); background:#fff; border-radius:9px; padding:7px 0;
  font-weight:700; font-size:14px; color:var(--ink2);
}
.sheet button.done{background:var(--ok-soft); border-color:#9ed3b6; color:#0b6b3d}
.sheet button.mark{background:var(--warn-soft); border-color:#e7bd7d; color:#8a5200}
.sheet button.cur{outline:3px solid #bfd3ff; outline-offset:1px}

/* ---------- 布局：宽屏分栏 ---------- */
.split{display:block}
@media (min-width:900px){
  .split{display:grid; grid-template-columns:1fr 1fr; gap:14px; align-items:start}
  .split > .right{position:sticky; top:96px; max-height:calc(100vh - 120px); overflow:auto}
  .split > .left{max-height:calc(100vh - 120px); overflow:auto}
}

/* ---------- 音频 ---------- */
.audio-box{background:#f7f9fc; border:1px solid var(--line); border-radius:var(--radius); padding:12px}
.audio-box audio{width:100%}
.playbtn{border:1.5px solid var(--brand); color:var(--brand); background:#fff; border-radius:11px;
  padding:12px 18px; font-weight:700; width:100%; margin-bottom:8px}
.playbtn.on{background:var(--brand); color:#fff}
.played{font-size:13px; color:var(--warn)}

/* ---------- 原页 ---------- */
.pageimg{width:100%; border:1px solid var(--line); border-radius:10px; background:#fff}

/* ---------- 遮罩 / 抽屉 ---------- */
.mask{position:fixed; inset:0; background:rgba(16,24,36,.5); z-index:80; display:flex;
  align-items:flex-end; justify-content:center}
@media (min-width:700px){.mask{align-items:center}}
.drawer{background:#fff; width:100%; max-width:720px; max-height:92vh; overflow:auto;
  border-radius:14px 14px 0 0; padding:16px}
@media (min-width:700px){.drawer{border-radius:14px}}
.drawer h2{margin-top:0}
.fullpage{position:fixed; inset:0; background:#fff; z-index:90; overflow:auto; padding:8px}
.fullpage .close{position:fixed; right:10px; top:10px; z-index:91}

/* ---------- 底部固定条 ---------- */
.bottombar{
  position:fixed; left:0; right:0; bottom:0; z-index:60; background:rgba(255,255,255,.96);
  backdrop-filter:blur(6px); border-top:1px solid var(--line); display:flex; gap:8px;
  padding:9px 12px; padding-bottom:calc(9px + env(safe-area-inset-bottom));
}
.bottombar .btn{flex:0 0 auto}
.bottombar .btn.grow{flex:1}

/* ---------- 表格 ---------- */
table{border-collapse:collapse; width:100%; font-size:14px}
th,td{border:1px solid var(--line); padding:6px 8px; text-align:left}
th{background:#f2f5f9; font-weight:700}
td.c{text-align:center}
.k{color:var(--ok); font-weight:700}
.x{color:var(--bad); font-weight:700}

/* ---------- 提示条 ---------- */
.banner{border-radius:10px; padding:9px 12px; font-size:14px; margin-bottom:10px}
.banner.warn{background:var(--warn-soft); border:1px solid #f0d3a1; color:#7a4700}
.banner.bad{background:var(--bad-soft); border:1px solid #f3c2bd; color:#a3261c}
.banner.ok{background:var(--ok-soft); border:1px solid #b7e2cb; color:#0b6b3d}

/* ---------- 记述 ---------- */
textarea{width:100%; min-height:280px; border:1.5px solid var(--line); border-radius:11px;
  padding:12px; font:inherit; line-height:2.0; resize:vertical}
.counter{font-variant-numeric:tabular-nums; font-size:14px; font-weight:600}
.counter.over{color:var(--bad)}
.counter.good{color:var(--ok)}