:root {
  --bg: #f6f5f1;
  --card: #ffffff;
  --ink: #1f2328;
  --muted: #6b7078;
  --line: #e3e1da;
  --brand: #1d4e89;
  --brand-soft: #e8eff8;
  --ok: #1f7a4d;
  --ok-soft: #e6f4ec;
  --bad: #b3261e;
  --bad-soft: #fbeaea;
  --warn: #8a5a00;
  --warn-soft: #fff4dc;
  --radius: 10px;
  font-size: 16px;
}
* { box-sizing: border-box; }
body {
  margin: 0; background: var(--bg); color: var(--ink);
  font-family: -apple-system, "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  line-height: 1.7;
}
a { color: var(--brand); text-decoration: none; }
a:hover { text-decoration: underline; }
img { max-width: 100%; height: auto; }
button, input, textarea, select { font: inherit; color: inherit; }

.topbar {
  position: sticky; top: 0; z-index: 20; display: flex; align-items: center; justify-content: space-between;
  gap: 12px; padding: 10px 20px; background: var(--card); border-bottom: 1px solid var(--line);
}
.brand { font-weight: 700; font-size: 18px; color: var(--ink); white-space: nowrap; }
.brand span { color: var(--brand); margin-left: 4px; }
.brand:hover { text-decoration: none; }
#nav { display: flex; gap: 14px; align-items: center; flex-wrap: wrap; justify-content: flex-end; font-size: 15px; }
#nav .who { color: var(--muted); }

main { max-width: 980px; margin: 0 auto; padding: 24px 16px 60px; }
.loading { color: var(--muted); text-align: center; padding: 60px 0; }
.foot { max-width: 980px; margin: 0 auto; padding: 0 16px 32px; color: var(--muted); font-size: 13px; text-align: center; }

h1 { font-size: 26px; margin: 0 0 6px; line-height: 1.35; }
h2 { font-size: 20px; margin: 28px 0 12px; }
h3 { font-size: 17px; margin: 0 0 8px; }
.sub { color: var(--muted); margin: 0 0 20px; }

.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 6px;
  padding: 8px 16px; border-radius: 8px; border: 1px solid var(--line); background: var(--card);
  cursor: pointer; white-space: nowrap; min-height: 40px;
}
.btn:hover { border-color: #c9c6bc; text-decoration: none; }
.btn.primary { background: var(--brand); border-color: var(--brand); color: #fff; }
.btn.primary:hover { background: #173f70; }
.btn.danger { color: var(--bad); }
.btn.small { padding: 4px 10px; min-height: 32px; font-size: 14px; }
.btn:disabled { opacity: .5; cursor: not-allowed; }
/* 键盘操作时看得清焦点在哪 */
a:focus-visible, button:focus-visible, select:focus-visible, summary:focus-visible, .btn:focus-visible { outline: 3px solid #7aa7e0; outline-offset: 2px; }
input:focus-visible, textarea:focus-visible { outline: 2px solid var(--brand); outline-offset: 0; border-color: var(--brand); }
.opt:focus-within { box-shadow: 0 0 0 3px #c9dbf2; }
main:focus { outline: none; }

.card { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 18px 20px; }
.notice { padding: 10px 14px; border-radius: 8px; font-size: 14px; margin: 10px 0; }
.notice.warn { background: var(--warn-soft); color: var(--warn); }
.notice.info { background: var(--brand-soft); color: var(--brand); }
.notice.bad { background: var(--bad-soft); color: var(--bad); }

/* 首页 */
.years { display: flex; gap: 8px; flex-wrap: wrap; margin: 16px 0 20px; }
.years button { padding: 6px 18px; border-radius: 999px; border: 1px solid var(--line); background: var(--card); cursor: pointer; }
.years button.on { background: var(--ink); color: #fff; border-color: var(--ink); }
.grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 14px; }
.paper .subj { font-size: 22px; font-weight: 700; }
.paper .meta { color: var(--muted); font-size: 14px; margin: 2px 0 10px; }
.note { font-size: 13px; color: var(--warn); margin-bottom: 10px; line-height: 1.6; }
.note summary { cursor: pointer; list-style: none; }
.note summary::-webkit-details-marker { display: none; }
.note .more { margin-left: 6px; color: var(--brand); white-space: nowrap; }
.note[open] .more { display: none; }
.note .note-body { margin-top: 4px; white-space: pre-wrap; }
.note.plain { color: var(--muted); }
.note.box.plain { background: #f0eee8; }
.note.box { background: var(--warn-soft); padding: 10px 14px; border-radius: 8px; font-size: 14px; margin: 10px 0; }
.note.src { color: var(--muted); margin: 4px 0 6px; }
.paper .mine { font-size: 13px; color: var(--muted); margin: -2px 0 10px; }
.paper .mine.doing { color: var(--bad); font-weight: 600; }
.tabnote { color: var(--muted); font-size: 14px; margin: -8px 0 0; }
.kind { display: inline-block; font-size: 12px; padding: 0 8px; border-radius: 4px; margin-bottom: 6px; font-weight: 600; }
.kind.gk { background: #fde9d9; color: #9a3c00; }
.kind.gr { background: #e3f1e8; color: #1f6b43; }
.kind.gd { background: #e8eff8; color: #1d4e89; }
.paper.guide { border-style: dashed; background: #fafbfd; }
.paper.guide .subj { font-size: 18px; }
.att .kind { margin: 0 6px 0 0; vertical-align: 1px; }
.paper .acts { display: flex; gap: 8px; }
.paper .acts .btn { flex: 1; }
.empty { color: var(--muted); padding: 30px 0; text-align: center; }

/* 表单 */
.form { max-width: 380px; margin: 30px auto; }
.form label { display: block; font-size: 14px; color: var(--muted); margin: 14px 0 4px; }
.form input { width: 100%; padding: 10px 12px; border: 1px solid var(--line); border-radius: 8px; background: #fff; }
.form .btn { width: 100%; margin-top: 18px; }
.form .alt { text-align: center; margin-top: 14px; font-size: 14px; }
.form .hint { display: block; font-size: 13px; color: var(--muted); margin-top: 4px; }
label.chk { display: inline-flex; align-items: center; gap: 6px; font-size: 14px; color: var(--muted); cursor: pointer; }
.form label.chk { display: inline-flex; margin-top: 10px; }
.err { color: var(--bad); font-size: 14px; min-height: 20px; margin-top: 8px; }

/* 题目 */
.section { margin-top: 26px; }
.section > h2 { margin-bottom: 8px; }
.material { background: #fbfaf7; border: 1px solid var(--line); border-radius: var(--radius); padding: 14px 18px; margin-bottom: 12px; }
.material.fold { max-height: 320px; overflow: hidden; position: relative; }
.material.fold::after { content: ""; position: absolute; left: 0; right: 0; bottom: 0; height: 60px; background: linear-gradient(transparent, #fbfaf7); }
.fold-btn { margin: -4px 0 12px; }
.q { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 16px 18px; margin-bottom: 12px; scroll-margin-top: 140px; }
.q.reading { border-color: var(--brand); box-shadow: 0 0 0 3px var(--brand-soft); }
.q-head { display: flex; align-items: baseline; gap: 8px; flex-wrap: wrap; margin-bottom: 6px; }
.q-no { font-weight: 700; }
.badge { font-size: 12px; padding: 1px 8px; border-radius: 999px; background: #f0eee8; color: var(--muted); }
.badge.ok { background: var(--ok-soft); color: var(--ok); }
.badge.bad { background: var(--bad-soft); color: var(--bad); }
.badge.part { background: var(--warn-soft); color: var(--warn); }
.stem p:first-child { margin-top: 0; }
.stem p:last-child { margin-bottom: 0; }
.md table { border-collapse: collapse; margin: 8px 0; display: block; overflow-x: auto; }
.md th, .md td { border: 1px solid var(--line); padding: 4px 10px; }
.md .katex-display { overflow-x: auto; overflow-y: hidden; padding: 4px 0; }
.md pre { max-width: 100%; overflow-x: auto; background: #fbfaf7; border: 1px solid var(--line); border-radius: 6px; padding: 8px 10px; font-size: 14px; }
.md .katex { position: relative; } /* 隐藏的 MathML 层是绝对定位的，不加这个会把手机页面撑宽 */
.md .katex.wide { display: block; max-width: 100%; overflow-x: auto; overflow-y: hidden; padding: 2px 0; }

.opts { display: grid; gap: 8px; margin-top: 10px; }
.opt { display: flex; gap: 10px; align-items: flex-start; padding: 8px 12px; border: 1px solid var(--line); border-radius: 8px; cursor: pointer; background: #fff; }
.opt input { margin-top: 6px; }
.opt .k { font-weight: 700; min-width: 1.2em; }
.opt.sel { border-color: var(--brand); background: var(--brand-soft); }
.opt.right { border-color: var(--ok); background: var(--ok-soft); }
.opt.wrong { border-color: var(--bad); background: var(--bad-soft); }
.opt p { margin: 0; }
.fills { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 10px; }
.fills input { padding: 8px 10px; border: 1px solid var(--line); border-radius: 8px; min-width: 180px; flex: 1; font-size: 16px; /* 小于 16px 时 iPhone 一点输入框就放大整页 */ }
.hint { font-size: 13px; color: var(--muted); margin-top: 6px; }
.keys { display: none; flex-wrap: wrap; gap: 4px; margin-top: 6px; align-items: center; }
.q.kbd .keys { display: flex; }
.keys-tip { font-size: 12px; color: var(--muted); }
.keys button { min-width: 34px; height: 32px; padding: 0 6px; border: 1px solid var(--line); border-radius: 6px; background: #fbfaf7; cursor: pointer; font-size: 15px; }
.keys button:hover { border-color: var(--brand); }
.md img { cursor: zoom-in; }
textarea.ans { width: 100%; min-height: 120px; padding: 10px 12px; border: 1px solid var(--line); border-radius: 8px; margin-top: 10px; resize: vertical; line-height: 1.7; font-size: 16px; }
textarea.ans.essay { min-height: 360px; }
.count { font-size: 12px; color: var(--muted); text-align: right; }
input:disabled, textarea:disabled { background: #f3f2ee; }

/* 考试 */
.exambar {
  position: sticky; top: 57px; z-index: 15; display: flex; align-items: center; gap: 14px; flex-wrap: wrap;
  background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 10px 16px; margin-bottom: 14px;
  box-shadow: 0 -8px 0 var(--bg); /* 盖住与顶栏之间的缝，滚动时不露出后面的题 */
}
.exambar .t { font-weight: 600; flex: 1; min-width: 160px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.clock { font-variant-numeric: tabular-nums; font-size: 24px; font-weight: 700; letter-spacing: 1px; }
.clock.low { color: var(--bad); }
.saved { font-size: 13px; color: var(--muted); min-width: 90px; }
.saved.bad { color: var(--bad); font-weight: 600; }
#prog { font-variant-numeric: tabular-nums; }
.navq { display: flex; flex-wrap: wrap; gap: 6px; }
.exambar .navq { flex-basis: 100%; max-height: 40vh; overflow-y: auto; padding-top: 8px; border-top: 1px solid var(--line); }
.navq[hidden] { display: none; }
.navq-tip { flex-basis: 100%; font-size: 12px; color: var(--muted); }
.navq button { min-width: 38px; height: 34px; padding: 0 6px; display: inline-flex; align-items: center; justify-content: center; border: 1px solid var(--line); border-radius: 6px; font-size: 13px; color: var(--ink); background: #fff; cursor: pointer; }
.navq button.done { background: var(--brand); color: #fff; border-color: var(--brand); }
.navq button:hover { border-color: var(--brand); }
/* 成绩页题号：颜色 = 得分情况 */
.navq.res button.full { background: var(--ok-soft); border-color: var(--ok); color: var(--ok); }
.navq.res button.part { background: var(--warn-soft); border-color: #d9a640; color: var(--warn); }
.navq.res button.zero, .navq.res button.blank { background: var(--bad-soft); border-color: var(--bad); color: var(--bad); }
.navq.res button.pending { background: #f0eee8; color: var(--muted); border-style: dashed; }
.resbar { margin-top: 16px; }
.filters { display: flex; gap: 6px; flex-wrap: wrap; margin-bottom: 10px; }
.filters button { padding: 4px 14px; border-radius: 999px; border: 1px solid var(--line); background: var(--card); cursor: pointer; font-size: 14px; min-height: 34px; }
.filters button.on { background: var(--ink); color: #fff; border-color: var(--ink); }
.legend { font-size: 12px; color: var(--muted); margin-top: 8px; display: flex; gap: 4px 10px; flex-wrap: wrap; align-items: center; }
.legend i { display: inline-block; width: 12px; height: 12px; border-radius: 3px; vertical-align: -1px; margin-right: 2px; border: 1px solid; }
.legend i.full { background: var(--ok-soft); border-color: var(--ok); }
.legend i.part { background: var(--warn-soft); border-color: #d9a640; }
.legend i.zero { background: var(--bad-soft); border-color: var(--bad); }
.legend i.pending { background: #f0eee8; border-color: #bbb; border-style: dashed; }
.q[hidden], .section[hidden] { display: none; }
.locked { position: fixed; inset: 0; background: rgba(20, 22, 26, .55); display: flex; align-items: center; justify-content: center; z-index: 50; padding: 16px; }
.locked .card { max-width: 380px; text-align: center; }
.rules { margin: 12px 0 20px; padding-left: 20px; }
.rules li { margin: 4px 0; }
.zoom { position: fixed; inset: 0; z-index: 70; background: #16181c; display: flex; flex-direction: column; }
.zoom .btn { color: var(--ink); }
.zoom-bar { display: flex; align-items: center; justify-content: space-between; gap: 10px; padding: 8px 12px; color: #ddd; font-size: 13px; }
.zoom-body { flex: 1; overflow: auto; display: flex; align-items: flex-start; justify-content: center; padding: 8px; }
.zoom-body img { width: auto; max-width: 100%; min-width: min(100%, 640px); height: auto; background: #fff; cursor: zoom-in; margin: auto; }
.zoom-body img.full { width: 200%; max-width: none; min-width: 0; cursor: zoom-out; }  /* 再点一下放大一倍，可拖动查看 */

/* 成绩 */
.score-big { font-size: 44px; font-weight: 800; line-height: 1.1; }
.score-big small { font-size: 20px; color: var(--muted); font-weight: 500; }
.result-row { display: grid; grid-template-columns: 90px minmax(0, 1fr); gap: 6px 10px; margin-top: 10px; font-size: 15px; }
.result-row .lab { color: var(--muted); }
.result-row > * { min-width: 0; } /* 宽公式在格子内横向滚动，不撑宽手机页面 */
.yours { white-space: pre-wrap; word-break: break-word; }
.points { margin: 6px 0 0; padding-left: 18px; font-size: 14px; }
.feedback { background: #fbfaf7; border-left: 3px solid var(--brand); padding: 8px 12px; margin-top: 8px; font-size: 14px; }
.score-split { color: var(--muted); font-size: 14px; margin: 6px 0 0; }
.secs { margin-top: 10px; font-size: 14px; }
.secs summary { cursor: pointer; color: var(--brand); }
.secs table.list td { white-space: normal; padding: 6px 10px; }
.secs table.list td:last-child { white-space: nowrap; text-align: right; }
.alt { color: var(--muted); font-size: 13px; margin-left: 6px; }
.otag { margin-left: auto; font-size: 12px; white-space: nowrap; padding-left: 8px; color: var(--muted); align-self: center; }
.opt.right .otag { color: var(--ok); font-weight: 600; }
.opt.wrong .otag { color: var(--bad); font-weight: 600; }
/* 我的成绩：卡片列表 */
.atts { display: grid; gap: 10px; }
.att { display: block; background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 12px 16px; color: var(--ink); }
.att:hover { text-decoration: none; border-color: var(--brand); }
.att-t { font-weight: 600; }
.att-m { font-size: 13px; color: var(--muted); }
.att-s { display: flex; align-items: baseline; gap: 8px; flex-wrap: wrap; margin-top: 4px; }
.att-s .score { font-size: 22px; font-weight: 700; }
.att-s .score small { font-size: 14px; color: var(--muted); font-weight: 400; }
.att-s .pct { color: var(--muted); font-size: 14px; }
.att-s .go { margin-left: auto; color: var(--brand); font-size: 14px; }

/* 解读 */
.studybar { position: sticky; top: 57px; z-index: 15; box-shadow: 0 -8px 0 var(--bg); display: flex; gap: 8px; flex-wrap: wrap; align-items: center; background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 8px 12px; margin-bottom: 14px; }
.studybar .grow { flex: 1; }
.studybar .sel { font-size: 14px; color: var(--muted); white-space: nowrap; }
.studybar .sel select { min-height: 32px; }
.studybar .now { font-size: 13px; color: var(--brand); }
.q-head .speak { margin-left: auto; }
.speak.on { background: var(--brand-soft); border-color: var(--brand); color: var(--brand); }
.block { margin-top: 12px; padding-top: 10px; border-top: 1px dashed var(--line); }
.block .lab { font-size: 13px; font-weight: 700; color: var(--brand); margin-bottom: 2px; }
.check { background: var(--warn-soft); color: var(--warn); font-size: 13px; padding: 6px 10px; border-radius: 6px; margin-top: 10px; }
.review-note { background: #f3f2ee; color: var(--muted); font-size: 13px; padding: 6px 10px; border-radius: 6px; margin-top: 10px; }
.rubric { font-size: 14px; color: var(--muted); padding-left: 18px; margin: 4px 0 0; }

/* 表格（后台、记录） */
.tablewrap { overflow-x: auto; background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); }
table.list { width: 100%; border-collapse: collapse; font-size: 14px; }
table.list th, table.list td { padding: 9px 12px; border-bottom: 1px solid var(--line); text-align: left; white-space: nowrap; }
table.list th { background: #fbfaf7; font-weight: 600; color: var(--muted); }
table.list tr:last-child td { border-bottom: 0; }
.stats { display: grid; grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); gap: 10px; margin-bottom: 20px; }
.stat { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 12px 14px; }
.stat .n { font-size: 24px; font-weight: 700; }
.stat .l { font-size: 13px; color: var(--muted); }
.tabs { display: flex; gap: 6px; margin: 10px 0 18px; border-bottom: 1px solid var(--line); }
.tabs button { padding: 8px 14px; border: 0; background: none; cursor: pointer; border-bottom: 2px solid transparent; color: var(--muted); }
.tabs button.on { color: var(--ink); border-bottom-color: var(--brand); font-weight: 600; }
.toolbar { display: flex; gap: 8px; margin-bottom: 12px; flex-wrap: wrap; }
.toolbar input { padding: 8px 10px; border: 1px solid var(--line); border-radius: 8px; flex: 1; min-width: 160px; }
.pager { display: flex; gap: 8px; justify-content: flex-end; align-items: center; margin-top: 10px; font-size: 14px; color: var(--muted); }

#toast { position: fixed; left: 50%; bottom: 24px; transform: translateX(-50%); background: var(--ink); color: #fff; padding: 10px 18px; border-radius: 8px; font-size: 14px; width: max-content; opacity: 0; pointer-events: none; transition: opacity .2s; z-index: 60; max-width: calc(100% - 32px); }
#toast.show { opacity: 1; }

/* 知识点梳理 */
.crumb { margin: 0 0 10px; font-size: 14px; }
.gactions { display: flex; gap: 10px; flex-wrap: wrap; margin: 12px 0 18px; }
.gtoc { margin-bottom: 22px; padding: 14px 16px; }
.gtoc-ch + .gtoc-ch { margin-top: 12px; padding-top: 10px; border-top: 1px dashed var(--line); }
.gtoc-h { font-weight: 700; margin-bottom: 6px; }
.gtoc-i { display: inline-block; margin: 0 10px 6px 0; font-size: 14px; }
.gchapter { margin-top: 8px; }
.gchapter > h2 { margin-top: 20px; }
.gtopic { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); margin-bottom: 10px; scroll-margin-top: 72px; }
.gtopic > summary { list-style: none; cursor: pointer; display: flex; align-items: baseline; justify-content: space-between; gap: 12px; padding: 14px 16px; font-weight: 600; }
.gtopic > summary::-webkit-details-marker { display: none; }
.gtopic-t { flex: 1; }
.gtopic-hint { font-size: 13px; font-weight: 400; color: var(--brand); white-space: nowrap; }
.gtopic[open] > summary { border-bottom: 1px solid var(--line); }
.gtopic[open] .gtopic-hint { display: none; }
.gtopic.reading { border-color: var(--brand); box-shadow: 0 0 0 3px var(--brand-soft); }
.gtopic-acts { display: inline-flex; align-items: center; gap: 8px; flex-shrink: 0; }
.gtopic-body { padding: 12px 16px 16px; }
.gbar { margin: 0 0 16px; position: sticky; top: 57px; z-index: 14; }
.gbar .grow { flex: 1; }
.gbar .now { font-size: 13px; color: var(--muted); max-width: 40%; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.gbox { margin: 0 0 14px; }
.gbox .lab { font-size: 13px; color: var(--muted); margin-bottom: 6px; font-weight: 600; }
.gformulas { margin: 0; padding-left: 1.2em; }
.gformulas li { margin: 6px 0; }
.xfer { border: 1px solid var(--line); border-radius: 8px; padding: 8px 12px; margin: 8px 0; background: #fbfaf7; }
.xfer summary { cursor: pointer; font-weight: 600; color: var(--brand); }
.xfer-q, .xfer-a { margin-top: 8px; font-size: 15px; }
.grel { font-size: 13px; color: var(--muted); margin: 8px 0 0; }
.ganim-tag {
  display: inline-block; margin-left: 8px; padding: 1px 7px; border-radius: 4px;
  font-size: 12px; font-weight: 600; vertical-align: middle;
  background: var(--brand-soft); color: var(--brand);
}
.ganim-cap { margin: 0 0 10px; font-size: 14px; color: var(--muted); }
.ganim-video {
  display: block; width: 100%; max-width: 560px; margin: 0 0 12px;
  border-radius: 8px; background: #111; aspect-ratio: 16 / 9;
}
.ganim-jsx { margin-top: 4px; }
.ganim-board {
  width: 100%; max-width: 560px; height: 360px;
  border: 1px solid var(--line); border-radius: 8px; background: #fff;
}
.ganim-loading, .ganim-err { font-size: 14px; color: var(--muted); margin: 8px 0; }
.ganim-err { color: var(--bad); }

@media (max-width: 640px) {
  main { padding: 16px 16px 48px; }
  .topbar { padding: 10px 16px; }
  .brand { font-size: 16px; }
  .brand span { display: none; }
  #nav { gap: 10px; font-size: 14px; }
  #nav .who { display: none; }
  h1 { font-size: 22px; }
  h2 { font-size: 17px; }
  .exambar, .studybar { top: 53px; }
  .clock { font-size: 20px; }
  /* 手机上考试条压成两行：标题一行，保存状态、答题卡、时间、交卷一行 */
  .exambar { gap: 6px 10px; padding: 8px 12px; }
  .exambar .t { flex: 1 1 calc(100% - 146px); font-size: 14px; min-width: 0; }
  .exambar .saved { flex: 0 0 136px; min-width: 0; font-size: 12px; text-align: right; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
  #cardbtn { margin-right: auto; }
  .exambar .btn.primary { min-height: 36px; padding: 6px 14px; }
  .studybar { gap: 6px; padding: 6px 10px; }
  .studybar .chk, .studybar .now { order: 5; }
  .studybar .grow { display: none; }
  .q { scroll-margin-top: 150px; }
  .att-s .go { flex-basis: 100%; margin-left: 0; }
  .result-row { grid-template-columns: minmax(0, 1fr); }
  .result-row .lab { margin-top: 6px; }
  .q { padding: 14px; }
}
@media print {
  .topbar, .exambar, .studybar, .navq, .foot, .btn { display: none !important; }
}