/* ==========================================================
   equation-puzzle-drill 算式谜与竖式谜填空练习
   视觉：谜题侦探社 —— 牛皮档案纸 + 打字机墨黑 + 案件红
   ========================================================== */
:root {
  --epd-paper: #f2ead7;
  --epd-card: #fbf6ea;
  --epd-ink: #2c2a25;
  --epd-ink2: #6b6353;
  --epd-red: #b23a2f;
  --epd-red-soft: #f3d9d4;
  --epd-pen: #34506e;
  --epd-line: #ddd2ba;
  --epd-ok: #2e7d4f;
  --epd-ok-soft: #e2f0e6;
  --epd-amber: #a8762a;
}
:root[data-theme="dark"] {
  --epd-paper: #26211a;
  --epd-card: #31291f;
  --epd-ink: #ece4d4;
  --epd-ink2: #a99e8a;
  --epd-red: #d96a5c;
  --epd-red-soft: #452b26;
  --epd-pen: #8fb0d4;
  --epd-line: #453c2e;
  --epd-ok: #6cc292;
  --epd-ok-soft: #24382c;
  --epd-amber: #d9a441;
}

.epd-page { max-width: 1200px; margin: 0 auto; padding: 0 0 40px; color: var(--epd-ink); }

/* ---------- 首屏 ---------- */
.epd-hero {
  display: grid; grid-template-columns: 1.25fr .75fr; gap: 28px; align-items: stretch;
  padding: 34px 34px 30px; border: 1px solid var(--epd-line); border-radius: 14px;
  background:
    repeating-linear-gradient(0deg, transparent 0 30px, rgba(52,80,110,.05) 30px 31px),
    var(--epd-paper);
  position: relative; overflow: hidden;
}
.epd-hero::before {
  content: ""; position: absolute; inset: 0; pointer-events: none;
  background: radial-gradient(600px 200px at 105% -10%, rgba(178,58,47,.10), transparent 60%);
}
.epd-kicker {
  display: inline-block; font-size: 12px; letter-spacing: .18em; text-transform: uppercase;
  color: var(--epd-red); font-weight: 700; margin-bottom: 10px;
  border-bottom: 2px dashed var(--epd-red); padding-bottom: 4px;
}
.epd-hero h1 { font-size: 30px; line-height: 1.25; margin: 0 0 12px; font-weight: 800; font-style: normal; }
.epd-lead { font-size: 15.5px; line-height: 1.85; color: var(--epd-ink); margin: 0 0 14px; }
.epd-lead b { color: var(--epd-red); }
.epd-tags { list-style: none; display: flex; flex-wrap: wrap; gap: 8px; padding: 0; margin: 0 0 18px; }
.epd-tags li {
  font-size: 12.5px; padding: 4px 10px; border-radius: 999px; font-weight: 600;
  background: var(--epd-card); border: 1px solid var(--epd-line); color: var(--epd-ink2);
}

/* 快捷入口 */
.epd-quick { background: var(--epd-card); border: 1px solid var(--epd-line); border-radius: 12px; padding: 14px 16px; }
.epd-quick-title { font-weight: 700; font-size: 14px; margin-bottom: 10px; }
.epd-quick-row { display: flex; flex-wrap: wrap; gap: 10px; align-items: flex-end; }
.epd-qfield { display: flex; flex-direction: column; gap: 4px; font-size: 12.5px; color: var(--epd-ink2); }
.epd-qfield select, .epd-qfield input {
  border: 1px solid var(--epd-line); background: var(--epd-paper); color: var(--epd-ink);
  border-radius: 8px; padding: 8px 10px; font-size: 14px; min-width: 150px;
}

/* 按钮 */
.epd-btn {
  border: 1px solid var(--epd-line); background: var(--epd-card); color: var(--epd-ink);
  padding: 8px 14px; border-radius: 8px; font-size: 13.5px; font-weight: 600; cursor: pointer;
  transition: transform .12s ease, box-shadow .12s ease;
}
.epd-btn:hover { transform: translateY(-1px); box-shadow: 0 3px 10px rgba(0,0,0,.10); }
.epd-btn--red { background: var(--epd-red); border-color: var(--epd-red); color: #fff; }
.epd-btn[disabled] { opacity: .45; cursor: not-allowed; transform: none; }

/* ---------- 案卷战况卡 ---------- */
.epd-card {
  background: var(--epd-card); border: 1px solid var(--epd-line); border-radius: 14px;
  padding: 18px; position: relative; display: flex; flex-direction: column; gap: 12px;
}
.epd-card-head { display: flex; justify-content: space-between; align-items: baseline; }
.epd-card-head b { font-size: 15px; }
.epd-card-head span { font-size: 12px; color: var(--epd-ink2); }
.epd-card-big { display: flex; align-items: baseline; gap: 10px; }
.epd-card-big em {
  font-style: normal; font-size: 12px; font-weight: 700; color: #fff; background: var(--epd-red);
  padding: 3px 8px; border-radius: 4px; letter-spacing: .12em;
}
.epd-card-big b { font-size: 30px; color: var(--epd-red); font-variant-numeric: tabular-nums; }
.epd-card-sub { font-size: 12.5px; color: var(--epd-ink2); }
.epd-card-rows { display: flex; flex-direction: column; }
.epd-card-row {
  display: flex; justify-content: space-between; padding: 9px 2px; font-size: 13.5px;
  border-top: 1px dashed var(--epd-line);
}
.epd-card-row .k { color: var(--epd-ink2); }
.epd-card-row .v { font-weight: 700; font-variant-numeric: tabular-nums; }
.epd-card-row.is-key .v { color: var(--epd-red); }
.epd-stamp {
  align-self: flex-end; font-size: 15px; font-weight: 800; letter-spacing: .3em; text-indent: .3em;
  color: var(--epd-red); border: 3px double var(--epd-red); border-radius: 6px;
  padding: 6px 12px; transform: rotate(-6deg); opacity: .85;
}

/* ---------- 校验提示 ---------- */
.epd-alert {
  margin-top: 16px; padding: 11px 16px; border-radius: 10px; font-size: 14px;
  background: var(--epd-red-soft); border: 1px solid var(--epd-red); color: var(--epd-red); font-weight: 600;
}

/* ---------- 面板 ---------- */
.epd-panel {
  margin-top: 18px; background: var(--epd-card); border: 1px solid var(--epd-line);
  border-radius: 14px; padding: 22px 26px;
}
.epd-panel-head { display: flex; align-items: center; gap: 12px; flex-wrap: wrap; margin-bottom: 16px; }
.epd-pk {
  font-size: 12px; font-weight: 800; letter-spacing: .12em; color: #fff; background: var(--epd-pen);
  padding: 4px 9px; border-radius: 5px; flex: none;
}
.epd-pk.is-red { background: var(--epd-red); }
.epd-pk.is-amber { background: var(--epd-amber); }
.epd-panel-head h2 { font-size: 19px; margin: 0; font-style: normal; }
.epd-panel-head h2 i { font-style: normal; font-size: 13px; color: var(--epd-ink2); font-weight: 500; margin-left: 8px; }
.epd-panel-side { margin-left: auto; font-size: 12.5px; color: var(--epd-ink2); }
.epd-actions { margin-left: auto; display: flex; gap: 8px; flex-wrap: wrap; }

/* ---------- 题卷 ---------- */
.epd-paper { display: flex; flex-direction: column; gap: 12px; }
.epd-q {
  border: 1px solid var(--epd-line); border-radius: 12px; background: var(--epd-paper);
  padding: 14px 16px 12px; position: relative;
}
.epd-q-head { display: flex; align-items: center; gap: 10px; margin-bottom: 10px; }
.epd-q-no {
  flex: none; width: 26px; height: 26px; border-radius: 50%; background: var(--epd-ink); color: var(--epd-paper);
  display: flex; align-items: center; justify-content: center; font-size: 13px; font-weight: 800;
}
.epd-q-type { font-size: 12px; color: var(--epd-ink2); font-weight: 600; }
.epd-q-verdict { margin-left: auto; font-size: 12.5px; font-weight: 700; color: var(--epd-ink2); }
.epd-q-verdict.ok { color: var(--epd-ok); }
.epd-q-verdict.bad { color: var(--epd-red); }
.epd-q-hintbtn {
  border: 1px dashed var(--epd-amber); background: transparent; color: var(--epd-amber);
  font-size: 12px; font-weight: 700; padding: 3px 9px; border-radius: 999px; cursor: pointer;
}
.epd-q-hintbtn[disabled] { opacity: .4; cursor: not-allowed; }

.epd-rows { display: flex; flex-direction: column; gap: 6px; align-items: center; padding: 6px 0 2px; }
.epd-rows.is-vert { width: 300px; max-width: 100%; align-self: center; }
.epd-rows.is-vert .epd-row { justify-content: flex-end; }
.epd-rows.is-vert .epd-ruler { align-self: stretch; }
.epd-row { display: flex; gap: 5px; align-items: center; justify-content: flex-start; font-size: 20px; }
.epd-op { color: var(--epd-pen); font-weight: 800; width: 24px; text-align: center; flex: none; }
.epd-op.is-tail { width: 0; overflow: hidden; }
.epd-cell {
  width: 34px; height: 42px; display: flex; align-items: center; justify-content: center;
  border-bottom: 2px solid var(--epd-ink); font-size: 21px; font-weight: 700;
  font-variant-numeric: tabular-nums; color: var(--epd-ink);
}
input.epd-cell {
  border: 2px solid var(--epd-amber); border-radius: 7px; background: var(--epd-card);
  padding: 0; text-align: center; outline: none; -moz-appearance: textfield;
}
input.epd-cell:focus { border-color: var(--epd-red); box-shadow: 0 0 0 3px rgba(178,58,47,.15); }
input.epd-cell.ok { border-color: var(--epd-ok); background: var(--epd-ok-soft); color: var(--epd-ok); }
input.epd-cell.bad { border-color: var(--epd-red); background: var(--epd-red-soft); color: var(--epd-red); }
input.epd-cell.revealed { border-style: dashed; color: var(--epd-amber); }
.epd-ruler { height: 0; border-top: 3px solid var(--epd-ink); align-self: stretch; margin: 2px 0; }
.epd-q-sol { margin-top: 8px; font-size: 12.5px; color: var(--epd-ink2); }
.epd-q-sol b { color: var(--epd-pen); }
.epd-paper-note { margin: 14px 0 0; font-size: 12.5px; color: var(--epd-ink2); }

/* ---------- 解析 ---------- */
.epd-ana { display: flex; flex-direction: column; gap: 10px; }
.epd-ana-item { border-left: 4px solid var(--epd-red); background: var(--epd-paper); border-radius: 8px; padding: 12px 16px; font-size: 14px; line-height: 1.8; }
.epd-ana-item b { color: var(--epd-red); }
.epd-ana-item .epd-ana-no { font-weight: 800; margin-right: 6px; }

/* ---------- 口径 / 介绍 ---------- */
.epd-terms { display: grid; grid-template-columns: 1fr; gap: 0; }
.epd-term { display: grid; grid-template-columns: 110px 1fr; gap: 14px; padding: 11px 2px; border-top: 1px dashed var(--epd-line); font-size: 14px; line-height: 1.85; }
.epd-term:first-child { border-top: 0; }
.epd-term b { color: var(--epd-pen); font-size: 13.5px; }
.epd-term span b { color: var(--epd-red); font-weight: 700; }
.epd-intro-body p { margin: 0 0 10px; font-size: 14.5px; line-height: 2; }
.epd-intro-body b { color: var(--epd-red); }

/* ---------- FAQ ---------- */
.epd-faq { display: flex; flex-direction: column; gap: 8px; }
.epd-faq-item { border: 1px solid var(--epd-line); border-radius: 10px; background: var(--epd-paper); padding: 12px 16px; }
.epd-faq-item summary { font-weight: 700; font-size: 14.5px; cursor: pointer; }
.epd-faq-a { margin-top: 8px; font-size: 13.5px; line-height: 1.9; color: var(--epd-ink); }
.epd-faq-a b { color: var(--epd-red); }

/* ---------- 相关工具 ---------- */
.epd-rel-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px; }
.epd-rel-card {
  display: flex; flex-direction: column; gap: 6px; text-decoration: none; color: var(--epd-ink);
  background: var(--epd-paper); border: 1px solid var(--epd-line); border-radius: 10px; padding: 14px;
  transition: transform .12s ease, box-shadow .12s ease;
}
.epd-rel-card:hover { transform: translateY(-2px); box-shadow: 0 6px 16px rgba(0,0,0,.10); }
.epd-rel-card .ic { font-size: 20px; }
.epd-rel-card b { font-size: 14px; }
.epd-rel-card i { font-style: normal; font-size: 12.5px; color: var(--epd-ink2); }

/* ---------- 打印稿 ---------- */
.epd-printzone { display: none; }

/* ---------- 响应式 ---------- */
@media (max-width: 960px) {
  .epd-hero { grid-template-columns: 1fr; padding: 24px 20px; }
  .epd-rel-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 560px) {
  .epd-page { padding: 0 0 24px; }
  .epd-hero h1 { font-size: 23px; }
  .epd-panel { padding: 16px 14px; }
  .epd-panel-side { display: none; }
  .epd-actions { margin-left: 0; width: 100%; }
  .epd-quick-row { flex-direction: column; align-items: stretch; }
  .epd-qfield select { width: 100%; }
  .epd-term { grid-template-columns: 1fr; gap: 2px; }
  .epd-row { font-size: 17px; gap: 3px; }
  .epd-cell { width: 27px; height: 36px; font-size: 17px; }
  .epd-rel-grid { grid-template-columns: 1fr; }
}

/* ==========================================================
   打印：只印 .epd-printzone，隐藏站点外壳与本页交互件
   ========================================================== */
@media print {
  body * { visibility: hidden; }
  .epd-printzone, .epd-printzone * { visibility: visible; }
  .epd-printzone { display: block; position: absolute; inset: 0; padding: 0; background: #fff; color: #000; }
  .nav-header, .footer, .back-to-top, #clicaptcha-container,
  #evadeFab, .evade-fab, #navEvadeBtn, .nav-evade-btn, #navMask,
  .ma-page-modal, .detail-breadcrumb, .epd-comments, .cm-wrap { display: none !important; }
  .epd-pz-sheet { color: #000; font-size: 14px; }
  .epd-pz-title { font-size: 18px; font-weight: 800; text-align: center; margin: 0 0 4px; }
  .epd-pz-sub { text-align: center; font-size: 12px; color: #444; margin-bottom: 14px; }
  .epd-pz-item { margin-bottom: 14px; }
  .epd-pz-row { display: flex; gap: 5px; align-items: center; justify-content: flex-start; font-size: 17px; min-height: 30px; }
  .epd-pz-cell { min-width: 22px; height: 26px; display: inline-flex; align-items: center; justify-content: center; border-bottom: 1.5px solid #000; font-weight: 700; }
  .epd-pz-ruler { border-top: 2px solid #000; align-self: stretch; }
  .epd-pz-op { width: 22px; text-align: center; font-weight: 700; }
  .epd-pz-anspage { page-break-before: always; }
  .epd-pz-ansline { font-size: 15px; margin-bottom: 8px; }
  .epd-pz-no { font-weight: 800; margin-bottom: 4px; }
  .epd-pz-name { font-size: 13px; margin-bottom: 12px; }
  .epd-pz-rows { display: inline-flex; flex-direction: column; gap: 4px; margin-bottom: 10px; }
  .epd-pz-rows .epd-pz-row { justify-content: flex-start; }
}