/* 听辨真伪 · 实验室 / 科普海报风 —— 区别于 01 深金工具台、02 羊皮卷 */
:root {
  --bg: #0E1116;
  --panel: #151a22;
  --card: #1a212c;
  --line: #2c3648;
  --cyan: #2EC4A6;
  --cyan-dim: #1f9a82;
  --amber: #f0b429;
  --text: #e8eef8;
  --mute: #8fa3c0;
  --danger: #FF5A4E;
  --ok: #2EC4A6;
  --warn-soft: #FF5A4E;
  --font: "PingFang SC", "Noto Sans SC", "Helvetica Neue", system-ui, sans-serif;
  --mono: "SF Mono", "JetBrains Mono", ui-monospace, monospace;
}
* { box-sizing: border-box; margin: 0; padding: 0; }
body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  line-height: 1.6;
  min-height: 100vh;
  background-image:
    radial-gradient(ellipse at 30% -5%, rgba(255,90,78,0.10), transparent 42%),
    radial-gradient(ellipse at 85% 90%, rgba(46,196,166,0.08), transparent 40%),
    linear-gradient(180deg, #0E1116 0%, #121820 100%);
}
.lab { max-width: 1040px; margin: 0 auto; padding: 28px 20px 48px; }

.lab-head {
  display: flex; gap: 16px; align-items: flex-start; flex-wrap: wrap;
  padding-bottom: 20px; border-bottom: 1px solid var(--line); margin-bottom: 18px;
}
.lab-mark {
  width: 52px; height: 52px; border: 2px solid var(--cyan);
  display: grid; place-items: center; color: var(--cyan);
  font-size: 1.4rem; box-shadow: 0 0 24px rgba(46,196,166,0.25);
}
.eyebrow {
  font-size: 0.72rem; letter-spacing: 0.28em; color: var(--cyan-dim); text-transform: uppercase;
}
.lab-head h1 {
  font-size: clamp(1.8rem, 4vw, 2.4rem); letter-spacing: 0.18em; font-weight: 600; margin-top: 4px;
}
.tagline { color: var(--mute); font-size: 0.9rem; margin-top: 6px; max-width: 36em; }
.badge {
  margin-left: auto; align-self: center;
  border: 1px solid var(--line); color: var(--mute);
  font-size: 0.72rem; letter-spacing: 0.08em; padding: 8px 12px;
}

.tabs { display: flex; gap: 8px; flex-wrap: wrap; margin-bottom: 18px; }
.tab {
  background: transparent; border: 1px solid var(--line); color: var(--mute);
  padding: 10px 14px; cursor: pointer; font: inherit; font-size: 0.88rem;
  letter-spacing: 0.04em; transition: 0.15s ease;
}
.tab:hover { border-color: var(--cyan-dim); color: var(--text); }
.tab.active {
  border-color: var(--cyan); color: var(--cyan);
  box-shadow: inset 0 -2px 0 var(--cyan);
}

.panel { display: none; }
.panel.active { display: block; }

.edu-progress { display: flex; align-items: center; gap: 12px; margin-bottom: 14px; }
.edu-progress span { font-family: var(--mono); font-size: 0.8rem; color: var(--cyan); min-width: 3.5em; }
.edu-progress .bar {
  flex: 1; height: 4px; background: var(--line); border-radius: 2px; overflow: hidden;
}
.edu-progress .bar i {
  display: block; height: 100%; background: linear-gradient(90deg, var(--cyan-dim), var(--cyan));
}
.edu-card {
  background: var(--card); border: 1px solid var(--line); padding: 28px 28px 24px;
  min-height: 280px; position: relative;
}
.edu-card::before {
  content: ""; position: absolute; top: 0; left: 0; right: 0; height: 3px;
  background: linear-gradient(90deg, var(--cyan), transparent 70%);
}
.edu-card h2 {
  font-size: 1.35rem; letter-spacing: 0.12em; margin-bottom: 12px; color: var(--amber);
}
.edu-card .lead { color: var(--mute); margin-bottom: 16px; font-size: 0.95rem; }
.edu-card ul { padding-left: 1.2em; color: var(--text); }
.edu-card li { margin-bottom: 8px; }
.edu-card .poster {
  margin-top: 18px; padding: 12px 14px; border-left: 3px solid var(--cyan);
  background: rgba(62,207,207,0.06); font-size: 0.88rem; color: var(--mute);
}

.row { display: flex; gap: 10px; flex-wrap: wrap; margin-top: 16px; }
.btn {
  background: var(--panel); border: 1px solid var(--line); color: var(--text);
  padding: 10px 16px; cursor: pointer; font: inherit; font-size: 0.88rem;
}
.btn:hover { border-color: var(--mute); }
.btn-cyan {
  border-color: var(--cyan); color: var(--cyan);
  background: rgba(62,207,207,0.08);
}
.btn-cyan:hover { background: rgba(62,207,207,0.16); }
.btn.active-sample {
  border-color: var(--amber); color: var(--amber);
}

.listen-grid, .wm-grid {
  display: grid; grid-template-columns: 1fr 1.15fr; gap: 16px;
}
@media (max-width: 800px) {
  .listen-grid, .wm-grid { grid-template-columns: 1fr; }
}
.card {
  background: var(--card); border: 1px solid var(--line); padding: 20px;
}
.card h2 {
  font-size: 1.05rem; letter-spacing: 0.1em; margin-bottom: 8px; color: var(--cyan);
}
.hint { font-size: 0.85rem; color: var(--mute); margin-bottom: 14px; }
.sample-list { display: flex; flex-direction: column; gap: 8px; }
.sample-row {
  display: flex; gap: 8px; align-items: center; flex-wrap: wrap;
  padding: 10px; border: 1px solid var(--line); background: var(--panel);
}
.sample-row strong { min-width: 5.5em; font-size: 0.9rem; }
.sample-row span.meta { font-size: 0.75rem; color: var(--mute); flex: 1; }
.verdict {
  margin-top: 14px; padding: 10px 12px; border: 1px dashed var(--line);
  font-size: 0.85rem; color: var(--mute);
}
.verdict.ok { border-color: var(--ok); color: var(--ok); }
.verdict.warn { border-color: var(--amber); color: var(--amber); }

.viz-card canvas {
  width: 100%; background: #0a101c; border: 1px solid var(--line); display: block; margin-bottom: 10px;
}
.feat {
  display: grid; grid-template-columns: 1fr 1fr; gap: 8px 12px; font-size: 0.82rem;
}
.feat div {
  display: flex; justify-content: space-between; gap: 8px;
  padding: 6px 8px; background: var(--panel); border: 1px solid var(--line);
}
.feat dt { color: var(--mute); }
.feat dd { font-family: var(--mono); color: var(--amber); }

label {
  display: block; font-size: 0.85rem; color: var(--mute); margin-bottom: 12px;
}
label input[type="range"] { width: 100%; margin-top: 6px; accent-color: var(--cyan); }
.limits {
  margin-top: 12px; padding-left: 1.1em; font-size: 0.8rem; color: var(--mute);
}
.limits li { margin-bottom: 6px; }

.lab-foot {
  margin-top: 28px; padding-top: 16px; border-top: 1px solid var(--line);
  font-size: 0.75rem; color: var(--mute); text-align: center; letter-spacing: 0.04em;
}


/* ——— 课后小测 ——— */
.quiz-card { padding: 22px 24px; }
.quiz-card > h2 { margin-bottom: 8px; letter-spacing: 0.08em; }
.quiz-q {
  border: 1px solid var(--line);
  background: var(--panel);
  padding: 16px 18px;
  margin: 14px 0;
}
.quiz-q h3 {
  font-size: 0.95rem; font-weight: 600; margin-bottom: 10px; color: var(--text);
}
.quiz-q h3 .qn { color: var(--cyan); font-family: var(--mono); margin-right: 8px; }
.quiz-opts { display: flex; flex-direction: column; gap: 8px; }
.quiz-opts label {
  display: flex; gap: 10px; align-items: flex-start;
  padding: 10px 12px; border: 1px solid var(--line);
  cursor: pointer; font-size: 0.88rem; color: var(--mute);
  transition: 0.12s ease;
}
.quiz-opts label:hover { border-color: var(--cyan-dim); color: var(--text); }
.quiz-opts label.picked { border-color: var(--cyan); color: var(--text); }
.quiz-opts label.correct {
  border-color: var(--ok); background: rgba(93,222,165,0.08); color: var(--text);
}
.quiz-opts label.wrong {
  border-color: var(--danger); background: rgba(255,107,122,0.08); color: var(--text);
}
.quiz-opts input { margin-top: 3px; accent-color: var(--cyan); }
.quiz-explain {
  margin-top: 10px; padding: 10px 12px;
  font-size: 0.82rem; color: var(--mute);
  border-left: 3px solid var(--amber); background: rgba(240,180,41,0.06);
  display: none;
}
.quiz-explain.show { display: block; }
.quiz-foot {
  display: flex; flex-wrap: wrap; gap: 12px; align-items: center;
  margin-top: 16px; padding-top: 14px; border-top: 1px solid var(--line);
}
.quiz-foot .verdict { flex: 1; min-width: 200px; }

/* —— overnight v3.2 —— */
.lab-banner {
  display: flex; align-items: center; justify-content: space-between; gap: 12px;
  margin: 0 0 14px; padding: 10px 14px;
  background: linear-gradient(90deg, rgba(34,211,238,0.12), rgba(99,102,241,0.10));
  border: 1px solid rgba(34,211,238,0.35); border-radius: 10px;
  font-size: 0.84rem; color: #dbeafe;
}
.lab-banner kbd {
  border: 1px solid #22d3ee; border-radius: 3px; padding: 0 5px; background: rgba(0,0,0,0.35); font-size: 0.75rem;
}
.banner-ok {
  border: 1px solid #22d3ee; background: transparent; color: #67e8f9;
  border-radius: 999px; padding: 4px 12px; cursor: pointer; font-size: 0.78rem;
}
.lab-toast {
  position: fixed; bottom: 24px; left: 50%; transform: translateX(-50%) translateY(70px);
  background: #0f172a; color: #e2e8f0; border: 1px solid #22d3ee; border-radius: 999px;
  padding: 10px 18px; font-size: 0.85rem; opacity: 0; transition: all 0.3s; z-index: 120;
  pointer-events: none;
}
.lab-toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }
.lab-error {
  margin: 0 0 12px; padding: 10px 14px; border-radius: 8px;
  background: rgba(248,113,113,0.12); border: 1px solid rgba(248,113,113,0.45); color: #fecaca;
  font-size: 0.86rem;
}
.lab-error[hidden] { display: none !important; }
.lab-help {
  position: fixed; inset: 0; background: rgba(2,6,23,0.72); z-index: 200;
  display: flex; align-items: center; justify-content: center;
}
.lab-help[hidden] { display: none !important; }
.lab-help-card {
  max-width: 520px; width: 90%; background: #0f172a; border: 1px solid #22d3ee;
  border-radius: 12px; padding: 24px; color: #e2e8f0;
}
.lab-help-card h2 { margin: 0 0 10px; color: #67e8f9; }
.lab-help-card ol { line-height: 1.7; margin: 0 0 14px; padding-left: 1.2em; font-size: 0.9rem; }
.tab:focus-visible, button:focus-visible, input:focus-visible {
  outline: 2px solid #22d3ee; outline-offset: 2px;
}
.sample-list:empty::before {
  content: "暂无示例。请刷新页面或检查脚本是否加载。";
  display: block; color: #94a3b8; font-size: 0.85rem; padding: 8px 0;
}
.quiz-card .quiz-empty-hint {
  color: #94a3b8; font-size: 0.85rem; margin-bottom: 8px;
}
@keyframes tabPulse { 0%{box-shadow:none} 50%{box-shadow:0 0 0 2px rgba(34,211,238,0.45)} 100%{box-shadow:none} }
.tab.just-on { animation: tabPulse 0.6s ease; }
/* v6 防骗卡 */
.guard-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 16px; margin: 16px 0; }
.guard-item { border: 1px solid rgba(255,255,255,.15); border-radius: 14px; padding: 18px; }
.guard-item b { color: #ff6a3d; font-size: 1.4rem; }
.guard-item h3 { font-size: 2rem; margin: 6px 0; }

/* ——— P0 升级 2026-10-20：深夜来电 + 四章 + 菜单 + A/B ——— */
:root {
  --bg: #0E1116;
  --panel: #151a22;
  --card: #1a212c;
  --line: #2c3648;
  --cyan: #2EC4A6;
  --cyan-dim: #1f9a82;
  --amber: #f0b429;
  --text: #e8eef8;
  --mute: #8fa3c0;
  --danger: #FF5A4E;
  --ok: #2EC4A6;
  --warn-soft: #FF5A4E;
}

body {
  background: var(--bg);
  background-image:
    radial-gradient(ellipse at 30% -5%, rgba(255,90,78,0.10), transparent 42%),
    radial-gradient(ellipse at 85% 90%, rgba(46,196,166,0.08), transparent 40%),
    linear-gradient(180deg, #0E1116 0%, #121820 100%);
  font-size: 16px;
}

/* 来电未结束时压住主界面滚动感 */
.lab-locked {
  visibility: hidden;
  pointer-events: none;
  max-height: 0;
  overflow: hidden;
  padding: 0;
  margin: 0;
}

.call-overlay {
  position: fixed; inset: 0; z-index: 300;
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  padding: 24px 16px; text-align: center;
}
.call-overlay[hidden] { display: none !important; }
.call-overlay.is-leaving { opacity: 0; transition: opacity 0.3s ease; pointer-events: none; }
.call-bg {
  position: absolute; inset: 0;
  background:
    radial-gradient(ellipse at 50% 30%, rgba(255,90,78,0.18), transparent 55%),
    radial-gradient(ellipse at 50% 80%, rgba(46,196,166,0.06), transparent 50%),
    #0E1116;
}
.call-scene {
  position: relative; z-index: 1;
  font-size: 0.75rem; letter-spacing: 0.22em; color: var(--mute);
  margin-bottom: 18px; text-transform: uppercase;
}
.call-card {
  position: relative; z-index: 1;
  width: min(380px, 92vw);
  background: rgba(26,33,44,0.92);
  border: 1px solid var(--line);
  border-radius: 28px;
  padding: 36px 28px 28px;
  box-shadow: 0 24px 64px rgba(0,0,0,0.45), 0 0 0 1px rgba(255,90,78,0.12);
}
.call-pulse {
  position: absolute; left: 50%; top: 72px; width: 88px; height: 88px;
  margin-left: -44px; border-radius: 50%;
  border: 2px solid rgba(255,90,78,0.45);
  animation: callRing 1.6s ease-out infinite;
  pointer-events: none;
}
@keyframes callRing {
  0% { transform: scale(0.85); opacity: 0.9; }
  100% { transform: scale(1.55); opacity: 0; }
}
.call-avatar {
  width: 88px; height: 88px; margin: 0 auto 16px;
  border-radius: 50%;
  background: linear-gradient(145deg, #2a3344, #1a212c);
  border: 2px solid var(--danger);
  display: grid; place-items: center;
  font-size: 1.6rem; font-weight: 600; color: var(--text);
  box-shadow: 0 0 28px rgba(255,90,78,0.25);
}
.call-label {
  font-size: 0.8rem; color: var(--danger); letter-spacing: 0.2em; margin-bottom: 6px;
}
.call-title {
  font-size: clamp(1.8rem, 5vw, 2.2rem);
  letter-spacing: 0.12em; font-weight: 600; margin-bottom: 8px;
}
.call-sub { color: var(--mute); font-size: 0.92rem; margin-bottom: 10px; }
.call-tip { color: var(--mute); font-size: 0.84rem; margin-bottom: 22px; line-height: 1.5; }
.call-actions {
  display: flex; gap: 28px; justify-content: center; align-items: flex-start;
}
.call-btn {
  display: flex; flex-direction: column; align-items: center; gap: 8px;
  background: transparent; border: none; color: var(--text);
  cursor: pointer; font: inherit; font-size: 0.85rem;
}
.call-btn-icon {
  width: 64px; height: 64px; border-radius: 50%;
  display: grid; place-items: center; font-size: 1.4rem;
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}
.call-btn.decline .call-btn-icon {
  background: var(--danger); color: #fff;
  box-shadow: 0 8px 24px rgba(255,90,78,0.35);
}
.call-btn.answer .call-btn-icon {
  background: var(--ok); color: #0E1116;
  box-shadow: 0 8px 24px rgba(46,196,166,0.35);
}
.call-btn:hover .call-btn-icon { transform: scale(1.06); }
.call-btn:focus-visible { outline: 2px solid var(--cyan); outline-offset: 4px; border-radius: 8px; }
.call-skip { position: relative; z-index: 1; margin-top: 22px; }
.linkish {
  background: none; border: none; color: var(--mute); font: inherit; font-size: 0.8rem;
  text-decoration: underline; cursor: pointer; opacity: 0.75;
}
.linkish:hover { color: var(--text); opacity: 1; }

/* 头栏右侧：徽章 + 菜单 */
.lab-head-right {
  margin-left: auto; display: flex; flex-direction: column; align-items: flex-end; gap: 10px;
}
.menu-wrap { position: relative; }
.menu-toggle { min-width: 72px; }
.lab-menu {
  position: absolute; right: 0; top: calc(100% + 6px); z-index: 80;
  min-width: 200px; padding: 10px;
  background: var(--panel); border: 1px solid var(--line); border-radius: 12px;
  box-shadow: 0 12px 32px rgba(0,0,0,0.4);
}
.lab-menu[hidden] { display: none !important; }
.lab-menu-title {
  font-size: 0.7rem; letter-spacing: 0.16em; color: var(--mute);
  padding: 4px 8px 8px;
}
.lab-menu-item {
  display: block; width: 100%; text-align: left;
  background: transparent; border: none; color: var(--text);
  padding: 10px 12px; font: inherit; font-size: 0.88rem; cursor: pointer; border-radius: 8px;
}
.lab-menu-item:hover { background: rgba(46,196,166,0.1); color: var(--cyan); }
.lab-menu-hr { border: none; border-top: 1px solid var(--line); margin: 6px 0; }

/* 四章进度条 */
.chapters {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 8px;
  margin-bottom: 18px;
}
.chapter {
  display: flex; align-items: center; justify-content: center; gap: 8px;
  padding: 12px 8px;
  background: var(--panel); border: 1px solid var(--line); color: var(--mute);
  cursor: pointer; font: inherit; font-size: 0.92rem; border-radius: 10px;
  transition: 0.15s ease;
}
.chapter:hover { border-color: var(--cyan-dim); color: var(--text); }
.chapter.active {
  border-color: var(--cyan); color: var(--cyan);
  box-shadow: inset 0 -2px 0 var(--cyan), 0 0 20px rgba(46,196,166,0.12);
}
.chapter .ch-i {
  font-family: var(--mono); font-size: 0.75rem; opacity: 0.7;
}
.chapter .ch-t { letter-spacing: 0.2em; font-weight: 600; }

/* 原 tabs 收进无障碍通道（仍可被 JS click） */
.tabs-sr {
  position: absolute !important;
  width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border: 0;
}

/* A/B 听辨卡 */
.ab-card .ab-prompt {
  font-size: 1.05rem; margin: 8px 0 14px; color: var(--text);
}
.ab-grid {
  display: grid; grid-template-columns: 1fr 1fr; gap: 12px; margin-bottom: 14px;
}
@media (max-width: 560px) {
  .ab-grid { grid-template-columns: 1fr; }
  .chapters { grid-template-columns: repeat(2, 1fr); }
}
.ab-clip {
  border: 1px solid var(--line); background: var(--panel);
  border-radius: 14px; padding: 16px; text-align: center;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}
.ab-clip.is-playing {
  border-color: var(--cyan);
  box-shadow: 0 0 0 1px rgba(46,196,166,0.35), 0 0 24px rgba(46,196,166,0.12);
}
.ab-clip-label {
  font-size: 0.78rem; letter-spacing: 0.18em; color: var(--mute); margin-bottom: 12px;
}
.ab-choices .ab-choice.picked { border-color: var(--amber); color: var(--amber); }
.ab-choices .ab-choice.correct {
  border-color: var(--ok); color: var(--ok); background: rgba(46,196,166,0.1);
}
.ab-choices .ab-choice.wrong {
  border-color: var(--danger); color: var(--danger); background: rgba(255,90,78,0.08);
}
.ab-choices .ab-choice:disabled { opacity: 0.85; cursor: default; }
.feat-disclaimer {
  margin-top: 14px; font-size: 0.75rem; color: var(--mute); opacity: 0.9;
  border-top: 1px dashed var(--line); padding-top: 10px;
}

.badge { margin-left: 0; }
.lab-head .badge { align-self: flex-end; }


/* —— 冲奖加深：防骗卡导出 / 辨章衔接 / 统一色 —— */
.guard-hint-label {
  display: block; margin-top: 16px; color: var(--mute); font-size: 0.88rem;
}
.guard-hint-label input {
  display: block; width: 100%; margin-top: 8px; padding: 12px 14px;
  background: var(--panel); border: 1px solid var(--line); border-radius: 10px;
  color: var(--text); font: inherit;
}
.ab-discern-box {
  background: rgba(46,196,166,0.06); border: 1px solid var(--line);
  border-radius: 14px; padding: 16px 18px; margin-bottom: 18px;
}
.ab-discern-box h3 { font-size: 1.05rem; margin: 6px 0 10px; letter-spacing: 0.06em; }
.discern-list { list-style: none; margin: 14px 0 0; display: grid; gap: 10px; }
.discern-hl {
  display: grid; gap: 4px; padding: 12px 14px;
  border-left: 3px solid var(--cyan); background: var(--panel); border-radius: 0 10px 10px 0;
}
.discern-hl strong { color: var(--cyan); font-size: 0.95rem; }
.discern-hl span { color: var(--mute); font-size: 0.88rem; }
.listen-lab-title {
  margin-top: 22px; margin-bottom: 8px; font-size: 0.95rem;
  color: var(--mute); letter-spacing: 0.08em; font-weight: 600;
}
.ab-discern-plays { margin: 12px 0; }
.ab-choice.correct { border-color: var(--ok) !important; color: var(--ok) !important; }
.ab-choice.wrong { border-color: var(--danger) !important; color: var(--danger) !important; }
.ab-choice.picked { box-shadow: inset 0 0 0 1px rgba(255,255,255,0.2); }