/* ==========================================================================
   ch10-5.css — 第 10.5 章「互动环节（互动答题）」
   --------------------------------------------------------------------------
   配色跟全站一致：深色底 + 金色描边 / 发光（--gold / --gold-lt 来自 base.css）。
   类名统一 quiz- 前缀，避免和 ch10 画板、ch11 老师寄语的样式互相误伤。

   结构：
     .quiz-wrap
       .quiz-head（标题「互动环节」）
       .quiz-stage
         .quiz-card（题干 / 线索 / 图片 / A-D 选项 / 反馈）
         .quiz-empty（未开放 / 加载失败 / 全部答完）
       .quiz-sign（固定署名，写死，后台不可删）
   ========================================================================== */

.quiz-wrap {
  position: absolute;
  top: 0;
  right: 0;
  bottom: 0;
  left: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 3.4vh 4.5vw 58px;
  overflow: hidden;
  color: var(--text);
}

/* 背景金雾：不挡点击 */
.quiz-glow {
  position: absolute;
  top: 0;
  right: 0;
  bottom: 0;
  left: 0;
  pointer-events: none;
  background:
    radial-gradient(circle at 50% 0%, rgba(212, 175, 55, 0.10), transparent 52%),
    radial-gradient(circle at 15% 90%, rgba(212, 175, 55, 0.05), transparent 46%),
    radial-gradient(circle at 88% 78%, rgba(240, 216, 120, 0.04), transparent 44%);
}

/* hidden 属性必须能压过下面的 display:flex / display:grid */
.quiz-wrap [hidden] { display: none !important; }

/* ---------------------------------------------------------------- 标题 */
.quiz-head {
  position: relative;
  flex: none;
  text-align: center;
  margin-bottom: 2.2vh;
  z-index: 1;
}

.quiz-kicker {
  font-size: clamp(10px, 0.9vw, 12.5px);
  letter-spacing: 0.42em;
  text-indent: 0.42em;
  color: var(--gold);
  opacity: 0.72;
  margin-bottom: 7px;
}

.quiz-title {
  margin: 0;
  font-size: clamp(23px, 2.7vw, 38px);
  font-weight: 800;
  letter-spacing: 0.18em;
  text-indent: 0.18em;
  color: #f0c74a;
  text-shadow:
    0 1px 0 rgba(255, 255, 255, 0.35),
    0 0 22px rgba(255, 200, 70, 0.28);
}

.quiz-rule {
  width: clamp(110px, 16vw, 170px);
  height: 1px;
  margin: 13px auto 0;
  background: linear-gradient(90deg, transparent, var(--gold), transparent);
}

/* ---------------------------------------------------------------- 舞台 */
.quiz-stage {
  position: relative;
  flex: 1 1 auto;
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 0;
  z-index: 1;
}

.quiz-card {
  position: relative;
  width: min(980px, 94vw);
  max-height: 100%;
  display: flex;
  flex-direction: column;
  padding: clamp(14px, 2.1vh, 24px) clamp(16px, 2.6vw, 32px) clamp(14px, 2vh, 22px);
  background:
    linear-gradient(158deg, rgba(23, 27, 38, 0.97), rgba(9, 11, 17, 0.97));
  border: 1px solid rgba(212, 175, 55, 0.34);
  border-radius: 18px;
  box-shadow:
    0 0 0 1px rgba(212, 175, 55, 0.06) inset,
    0 28px 72px rgba(0, 0, 0, 0.6),
    0 0 46px rgba(212, 175, 55, 0.08);
  overflow: visible;
}

.quiz-card.quiz-in { animation: quizCardIn 0.46s cubic-bezier(0.22, 1, 0.36, 1) both; }

@keyframes quizCardIn {
  from { opacity: 0; transform: translateY(14px) scale(0.985); }
  to   { opacity: 1; transform: translateY(0) scale(1); }
}

.quiz-card.is-right {
  border-color: rgba(76, 175, 125, 0.55);
  box-shadow: 0 0 0 1px rgba(76, 175, 125, 0.2) inset,
              0 28px 72px rgba(0, 0, 0, 0.6), 0 0 40px rgba(76, 175, 125, 0.14);
}

.quiz-card.is-wrong {
  border-color: rgba(224, 96, 95, 0.55);
  box-shadow: 0 0 0 1px rgba(224, 96, 95, 0.18) inset,
              0 28px 72px rgba(0, 0, 0, 0.6), 0 0 40px rgba(224, 96, 95, 0.12);
}

/* ---------------------------------------------------------------- 题号 / 进度点 */
.quiz-meta {
  flex: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 10px;
}

.quiz-no {
  font-size: clamp(11.5px, 1vw, 13px);
  letter-spacing: 0.18em;
  color: rgba(240, 216, 120, 0.82);
}

.quiz-dots { display: flex; align-items: center; gap: 6px; }

.quiz-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: rgba(212, 175, 55, 0.22);
  transition: background 0.2s, box-shadow 0.2s, transform 0.2s;
}

.quiz-dot.is-done { background: rgba(212, 175, 55, 0.55); }

.quiz-dot.is-on {
  background: var(--gold-lt);
  box-shadow: 0 0 10px rgba(240, 216, 120, 0.7);
  transform: scale(1.25);
}

/* ---------------------------------------------------------------- 正文布局 */
.quiz-body {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(12px, 2vw, 24px);
  min-height: 0;
}

.quiz-card.has-img .quiz-body {
  grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
  align-items: start;
}

.quiz-media {
  display: flex;
  align-items: center;
  justify-content: center;
  min-width: 0;
}

.quiz-img {
  display: block;
  max-width: 100%;
  max-height: min(32vh, 250px);
  object-fit: contain;
  background: rgba(0, 0, 0, 0.35);
  border: 1px solid rgba(212, 175, 55, 0.32);
  border-radius: 12px;
  box-shadow: 0 0 24px rgba(212, 175, 55, 0.12);
}

/* 后台没设置图片时的固定文案 —— 不留白、不报错 */
.quiz-noimg {
  width: 100%;
  padding: 11px 14px;
  text-align: center;
  font-size: clamp(12px, 1.02vw, 14px);
  letter-spacing: 0.12em;
  color: rgba(240, 216, 120, 0.62);
  background: rgba(212, 175, 55, 0.045);
  border: 1px dashed rgba(212, 175, 55, 0.3);
  border-radius: 10px;
}

.quiz-qa { min-width: 0; display: flex; flex-direction: column; }

.quiz-q {
  margin: 0 0 9px;
  font-size: clamp(17px, 1.62vw, 25px);
  line-height: 1.52;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: #f3f0e7;
  text-shadow: 0 2px 12px rgba(0, 0, 0, 0.45);
}

.quiz-hint {
  display: flex;
  align-items: center;
  gap: 8px;
  margin: 0 0 13px;
  font-size: clamp(12px, 1.02vw, 14px);
  line-height: 1.55;
  color: rgba(233, 230, 221, 0.66);
}

.quiz-hint-tag {
  flex: none;
  padding: 1px 8px;
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--gold-lt);
  background: rgba(212, 175, 55, 0.1);
  border: 1px solid rgba(212, 175, 55, 0.32);
  border-radius: 20px;
}

/* ---------------------------------------------------------------- 选项 */
.quiz-opts {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(8px, 1.2vh, 12px);
}

.quiz-opt {
  position: relative;
  display: flex;
  align-items: center;
  gap: 11px;
  width: 100%;
  min-height: 48px;
  padding: clamp(9px, 1.25vh, 13px) 14px;
  text-align: left;
  color: #e9e6dd;
  background: linear-gradient(150deg, rgba(31, 36, 50, 0.9), rgba(15, 18, 26, 0.9));
  border: 1px solid rgba(212, 175, 55, 0.22);
  border-radius: 12px;
  cursor: pointer;
  font-family: inherit;
  transition: border-color 0.16s, box-shadow 0.16s, background 0.16s, transform 0.16s;
  -webkit-tap-highlight-color: transparent;
}

.quiz-opt:hover {
  border-color: rgba(212, 175, 55, 0.62);
  box-shadow: 0 0 0 1px rgba(212, 175, 55, 0.16) inset, 0 0 22px rgba(212, 175, 55, 0.14);
  background: linear-gradient(150deg, rgba(38, 43, 58, 0.95), rgba(17, 20, 29, 0.95));
}

.quiz-opt:active { transform: scale(0.985); }

.quiz-opt-key {
  flex: none;
  width: clamp(27px, 2.3vw, 32px);
  height: clamp(27px, 2.3vw, 32px);
  display: grid;
  place-items: center;
  font-size: clamp(13px, 1.1vw, 15px);
  font-weight: 700;
  color: var(--gold-lt);
  background: rgba(212, 175, 55, 0.11);
  border: 1px solid rgba(212, 175, 55, 0.42);
  border-radius: 50%;
  transition: background 0.16s, color 0.16s, border-color 0.16s;
}


/* 甲乙丙丁… 标号是两个字，圆形徽标要略大一点、字号略小 */
.quiz-opts.is-cn .quiz-opt-key {
  width: clamp(33px, 2.7vw, 38px);
  height: clamp(33px, 2.7vw, 38px);
  font-size: clamp(11.5px, 0.96vw, 13px);
  letter-spacing: 0;
}

.quiz-opt-txt {
  flex: 1 1 auto;
  min-width: 0;
  font-size: clamp(13px, 1.08vw, 15.5px);
  line-height: 1.42;
  letter-spacing: 0.02em;
  word-break: break-word;
}

/* 已作答：整题锁定，点不动（判题逻辑里还有 S.locked 双保险） */
.quiz-opt.is-locked { cursor: default; pointer-events: none; }

/* 选对 / 选错 / 揭示正确答案 */
.quiz-opt.is-right {
  border-color: rgba(76, 175, 125, 0.8);
  background: linear-gradient(150deg, rgba(30, 74, 56, 0.92), rgba(12, 30, 23, 0.92));
  box-shadow: 0 0 0 1px rgba(76, 175, 125, 0.3) inset, 0 0 26px rgba(76, 175, 125, 0.24);
  animation: quizRightPop 0.4s cubic-bezier(0.22, 1, 0.36, 1) both;
}
.quiz-opt.is-right .quiz-opt-key {
  color: #d9ffe9;
  background: rgba(76, 175, 125, 0.28);
  border-color: rgba(76, 175, 125, 0.85);
}
.quiz-opt.is-right .quiz-opt-txt { color: #d9ffe9; font-weight: 700; }

.quiz-opt.is-wrong {
  border-color: rgba(224, 96, 95, 0.8);
  background: linear-gradient(150deg, rgba(78, 32, 34, 0.9), rgba(31, 12, 13, 0.9));
  box-shadow: 0 0 0 1px rgba(224, 96, 95, 0.26) inset, 0 0 24px rgba(224, 96, 95, 0.18);
  animation: quizWrongShake 0.42s ease-in-out both;
}
.quiz-opt.is-wrong .quiz-opt-key {
  color: #ffdada;
  background: rgba(224, 96, 95, 0.26);
  border-color: rgba(224, 96, 95, 0.85);
}
.quiz-opt.is-wrong .quiz-opt-txt { color: #ffdada; }

.quiz-opt.is-answer {
  border-color: rgba(240, 216, 120, 0.85);
  box-shadow: 0 0 0 1px rgba(240, 216, 120, 0.3) inset, 0 0 28px rgba(240, 216, 120, 0.28);
  animation: quizAnswerGlow 1s ease-in-out infinite;
}
.quiz-opt.is-answer .quiz-opt-key {
  color: #1a1405;
  background: linear-gradient(135deg, var(--gold-lt), var(--gold));
  border-color: var(--gold-lt);
}

@keyframes quizRightPop {
  0% { transform: scale(1); }
  45% { transform: scale(1.035); }
  100% { transform: scale(1); }
}

@keyframes quizWrongShake {
  0%, 100% { transform: translateX(0); }
  20% { transform: translateX(-6px); }
  40% { transform: translateX(6px); }
  60% { transform: translateX(-4px); }
  80% { transform: translateX(4px); }
}

@keyframes quizAnswerGlow {
  0%, 100% { box-shadow: 0 0 0 1px rgba(240, 216, 120, 0.25) inset, 0 0 18px rgba(240, 216, 120, 0.18); }
  50%      { box-shadow: 0 0 0 1px rgba(240, 216, 120, 0.4) inset, 0 0 34px rgba(240, 216, 120, 0.4); }
}

/* ---------------------------------------------------------------- 反馈 */
.quiz-fb {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
  min-height: 28px;
  margin-top: clamp(9px, 1.4vh, 14px);
  font-size: clamp(13px, 1.12vw, 15.5px);
  letter-spacing: 0.05em;
  opacity: 0;
  transform: translateY(4px);
  transition: opacity 0.2s, transform 0.2s;
}
.quiz-fb.is-ok { color: #7fe0ae; opacity: 1; transform: translateY(0); }
.quiz-fb.is-bad { color: #ff9a9a; opacity: 1; transform: translateY(0); }

.quiz-fb-ans {
  padding: 2px 11px;
  font-size: 0.92em;
  color: var(--gold-lt);
  background: rgba(212, 175, 55, 0.08);
  border: 1px solid rgba(212, 175, 55, 0.4);
  border-radius: 20px;
}

/* ---------------------------------------------------------------- 空 / 完成态 */
.quiz-empty {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 10px;
  width: min(660px, 90vw);
  padding: clamp(26px, 5vh, 48px) 24px;
  text-align: center;
  background: linear-gradient(158deg, rgba(23, 27, 38, 0.94), rgba(9, 11, 17, 0.94));
  border: 1px solid rgba(212, 175, 55, 0.3);
  border-radius: 18px;
  box-shadow: 0 24px 64px rgba(0, 0, 0, 0.55), 0 0 44px rgba(212, 175, 55, 0.08);
  animation: quizCardIn 0.46s cubic-bezier(0.22, 1, 0.36, 1) both;
}

.quiz-empty-ico {
  font-size: clamp(38px, 5.2vw, 60px);
  line-height: 1;
  filter: drop-shadow(0 0 18px rgba(212, 175, 55, 0.35));
}

.quiz-empty-t {
  font-size: clamp(18px, 1.9vw, 28px);
  font-weight: 700;
  letter-spacing: 0.08em;
  color: #f0c74a;
}

.quiz-empty-s {
  font-size: clamp(12px, 1.05vw, 14px);
  letter-spacing: 0.12em;
  color: rgba(233, 230, 221, 0.6);
}

/* ---------------------------------------------------------------- 固定署名（写死） */
.quiz-sign {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 41px;
  z-index: 2;
  margin: 0;
  padding: 0 4vw;
  text-align: center;
  font-size: 12.5px;
  line-height: 1.6;
  letter-spacing: 0.08em;
  color: rgba(212, 175, 55, 0.58);
  pointer-events: none;
}

/* ==========================================================================
   迷惑效果（decoy）—— 只作用在错误选项的装饰层，1.5~2.5 秒后由 JS 还原
   ========================================================================== */

/* ① 抖动 + 小字「选我！」 */
.quiz-opt.is-decoy-shake {
  border-color: rgba(240, 216, 120, 0.8);
  animation: quizDecoyShake 0.4s ease-in-out 0s 4;
}
@keyframes quizDecoyShake {
  0%, 100% { transform: translateX(0) rotate(0); }
  20% { transform: translateX(-7px) rotate(-0.6deg); }
  40% { transform: translateX(7px) rotate(0.6deg); }
  60% { transform: translateX(-5px) rotate(-0.4deg); }
  80% { transform: translateX(5px) rotate(0.4deg); }
}

.quiz-decoy-tag {
  position: absolute;
  top: -11px;
  right: 12px;
  z-index: 4;
  padding: 2px 10px;
  font-size: 11.5px;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: #1a1405;
  background: linear-gradient(135deg, var(--gold-lt), var(--gold));
  border-radius: 999px;
  box-shadow: 0 5px 16px rgba(212, 175, 55, 0.45);
  animation: quizTagPop 0.32s cubic-bezier(0.22, 1, 0.36, 1) both;
  pointer-events: none;
  white-space: nowrap;
}
@keyframes quizTagPop {
  from { opacity: 0; transform: translateY(6px) scale(0.8); }
  to   { opacity: 1; transform: translateY(0) scale(1); }
}

/* ② 文字变「选他 👉」+ 指向另一个错误选项 */
.quiz-opt.is-decoy-call {
  border-color: rgba(240, 216, 120, 0.85);
  animation: quizDecoyCall 0.9s ease-in-out infinite;
}
.quiz-opt.is-decoy-call .quiz-opt-txt {
  color: var(--gold-lt);
  font-weight: 700;
  letter-spacing: 0.04em;
}
@keyframes quizDecoyCall {
  0%, 100% { box-shadow: 0 0 0 1px rgba(240, 216, 120, 0.2) inset, 0 0 14px rgba(240, 216, 120, 0.16); }
  50%      { box-shadow: 0 0 0 1px rgba(240, 216, 120, 0.35) inset, 0 0 28px rgba(240, 216, 120, 0.34); }
}

.quiz-opt.is-decoy-point {
  padding-right: 42px;
  border-color: rgba(240, 216, 120, 0.72);
}
.quiz-opt.is-decoy-point::after {
  content: '👈';
  position: absolute;
  right: 10px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 18px;
  line-height: 1;
  pointer-events: none;
  animation: quizDecoyPoint 0.6s ease-in-out infinite alternate;
}
@keyframes quizDecoyPoint {
  from { transform: translateY(-50%) translateX(4px); }
  to   { transform: translateY(-50%) translateX(-4px); }
}

/* ③ 短暂逃跑：平移几十像素再回来 */
.quiz-opt.is-decoy-escape {
  z-index: 3;
  border-color: rgba(240, 216, 120, 0.7);
  animation: quizDecoyEscape var(--quiz-escape-dur, 1800ms) cubic-bezier(0.3, 0.9, 0.3, 1) both;
}
@keyframes quizDecoyEscape {
  0%   { transform: translateX(0) rotate(0); }
  16%  { transform: translateX(var(--quiz-escape-x, 48px)) rotate(1.6deg); }
  55%  { transform: translateX(var(--quiz-escape-x, 48px)) rotate(-1.2deg); }
  100% { transform: translateX(0) rotate(0); }
}

/* ④ 字母图标变 😜 / 🎯 闪一下 */
.quiz-opt.is-decoy-emoji .quiz-opt-key {
  font-size: 17px;
  background: rgba(212, 175, 55, 0.24);
  border-color: var(--gold-lt);
  animation: quizDecoyEmoji 0.3s ease-in-out infinite alternate;
}
@keyframes quizDecoyEmoji {
  from { transform: scale(0.9) rotate(-7deg); }
  to   { transform: scale(1.16) rotate(7deg); }
}

/* ⑤ 字母 A/B/C/D 乱序跳动 */
.quiz-opt.is-decoy-shuffle .quiz-opt-key {
  color: var(--gold-lt);
  border-color: var(--gold);
  background: rgba(212, 175, 55, 0.2);
  animation: quizDecoyShuffle 0.18s steps(2) infinite;
}
@keyframes quizDecoyShuffle {
  0%, 100% { transform: translateY(0) scale(1); }
  50%      { transform: translateY(-4px) scale(1.1); }
}


/* ⑥ 假系统提示：屏幕上方飘一条通知 */
.quiz-sysmsg {
  position: absolute;
  top: 10px;
  left: 50%;
  z-index: 9;
  transform: translateX(-50%);
  max-width: 92vw;
  overflow: hidden;
  padding: 9px 22px;
  font-size: clamp(12px, 1.02vw, 14px);
  letter-spacing: 0.05em;
  color: #f0d878;
  white-space: nowrap;
  text-overflow: ellipsis;
  background: rgba(10, 13, 20, 0.96);
  border: 1px solid rgba(240, 216, 120, 0.55);
  border-radius: 999px;
  box-shadow: 0 14px 40px rgba(0, 0, 0, 0.62), 0 0 28px rgba(212, 175, 55, 0.18);
  pointer-events: none;
  animation: quizSysIn 0.3s cubic-bezier(0.22, 1, 0.36, 1) both,
             quizSysOut 0.35s ease 1.65s forwards;
}
@keyframes quizSysIn {
  from { opacity: 0; transform: translate(-50%, -14px); }
  to   { opacity: 1; transform: translate(-50%, 0); }
}
@keyframes quizSysOut {
  to { opacity: 0; transform: translate(-50%, -8px); }
}

/* ⑦ 角色干扰（技术身份）：服务器 / 系统 / 浏览器 / 防火墙 / 基站 /
   光纤 / 路由器 / 电源，顶部飘入的系统通知，半透明黑底 + 图标，1.5~2.5s 淡出 */
.quiz-auth {
  position: absolute;
  top: 150px;
  left: 50%;
  z-index: 10;
  display: flex;
  align-items: center;
  gap: 10px;
  max-width: min(460px, 90vw);
  padding: 10px 16px;
  transform: translateX(-50%);
  background: rgba(7, 9, 14, 0.94);
  border: 1px solid rgba(240, 216, 120, 0.5);
  border-left: 3px solid #f0d878;
  border-radius: 9px;
  box-shadow: 0 16px 42px rgba(0, 0, 0, 0.62), 0 0 26px rgba(212, 175, 55, 0.14);
  pointer-events: none;
  animation: quizAuthIn 0.3s cubic-bezier(0.22, 1, 0.36, 1) both,
             quizAuthOut 0.35s ease 1.65s forwards;
}
@keyframes quizAuthIn {
  from { opacity: 0; transform: translate(-50%, -14px); }
  to   { opacity: 1; transform: translate(-50%, 0); }
}
@keyframes quizAuthOut {
  to { opacity: 0; transform: translate(-50%, -8px); }
}
.quiz-auth-ico {
  flex: none;
  width: 30px;
  height: 30px;
  display: grid;
  place-items: center;
  color: #f0d878;
  font-size: 17px;
  line-height: 1;
  background: rgba(240, 216, 120, 0.1);
  border: 1px solid rgba(240, 216, 120, 0.34);
  border-radius: 7px;
}
.quiz-auth-svg {
  width: 18px;
  height: 18px;
  display: block;
}
.quiz-auth-txt {
  font-size: clamp(12px, 1.02vw, 14px);
  line-height: 1.45;
  letter-spacing: 0.02em;
  color: rgba(240, 244, 252, 0.92);
}

/* ⑧ 错误项短暂发光 / 闪烁 */
.quiz-opt.is-decoy-glow {
  border-color: rgba(240, 216, 120, 0.9);
  animation: quizDecoyGlow 0.42s ease-in-out infinite alternate;
}
@keyframes quizDecoyGlow {
  from { box-shadow: 0 0 0 1px rgba(240, 216, 120, 0.25) inset, 0 0 12px rgba(240, 216, 120, 0.18); filter: brightness(1); }
  to   { box-shadow: 0 0 0 1px rgba(240, 216, 120, 0.55) inset, 0 0 34px rgba(240, 216, 120, 0.55); filter: brightness(1.22); }
}

/* ⑨ 假倒计时「3…2…1 即将提交」 */
.quiz-countdown {
  position: absolute;
  top: 0;
  right: 0;
  bottom: 0;
  left: 0;
  z-index: 8;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 4px;
  background: rgba(5, 6, 10, 0.55);
  border-radius: inherit;
  pointer-events: none;
  animation: quizCdFade 0.24s ease-out both;
}
@keyframes quizCdFade { from { opacity: 0; } to { opacity: 1; } }
.quiz-cd-num {
  font-size: clamp(46px, 6.6vw, 82px);
  font-weight: 800;
  line-height: 1;
  color: #f0c74a;
  text-shadow: 0 0 30px rgba(240, 200, 70, 0.5);
  animation: quizCdPop 0.55s cubic-bezier(0.22, 1, 0.36, 1) infinite alternate;
}
@keyframes quizCdPop {
  from { transform: scale(0.88); opacity: 0.75; }
  to   { transform: scale(1.06); opacity: 1; }
}
.quiz-cd-txt {
  font-size: clamp(12px, 1.05vw, 14px);
  letter-spacing: 0.34em;
  text-indent: 0.34em;
  color: rgba(240, 216, 120, 0.82);
}

/* ==========================================================================
   响应式
   ========================================================================== */
@media (max-width: 760px) {
  /* 顶部让开 HUD 的计时器（手机上 00:00 会压到标题） */
  .quiz-wrap { padding: 76px 4vw 52px; }
  .quiz-head { margin-bottom: 1.6vh; }
  .quiz-kicker { letter-spacing: 0.3em; text-indent: 0.3em; margin-bottom: 5px; }
  .quiz-rule { margin-top: 9px; }

  .quiz-card { width: 94vw; padding: 13px 14px 15px; border-radius: 15px; }
  .quiz-card.has-img .quiz-body { grid-template-columns: minmax(0, 1fr); }
  .quiz-img { max-height: 22vh; }
  .quiz-body { gap: 11px; }
  .quiz-q { font-size: clamp(16px, 4.6vw, 20px); }
  .quiz-hint { margin-bottom: 10px; }
  .quiz-opts { grid-template-columns: 1fr; gap: 8px; }
  .quiz-opt { min-height: 44px; padding: 9px 12px; }
  .quiz-fb { min-height: 24px; margin-top: 9px; }
  .quiz-sign { bottom: 39px; font-size: 12px; letter-spacing: 0.04em; }
  .quiz-sysmsg { padding: 8px 16px; }
  .quiz-auth { top: 168px; max-width: 92vw; padding: 8px 14px; }
}

@media (max-height: 640px) {
  .quiz-wrap { padding-top: 64px; }
  .quiz-auth { top: 118px; }
  .quiz-kicker { display: none; }
  .quiz-head { margin-bottom: 1.2vh; }
  .quiz-title { font-size: clamp(20px, 2.4vw, 30px); }
  .quiz-rule { margin-top: 8px; }
  .quiz-img { max-height: 24vh; }
  .quiz-q { margin-bottom: 6px; }
  .quiz-hint { margin-bottom: 8px; }
  .quiz-opt { min-height: 42px; }
}

/* 尊重系统「减少动态效果」设置：只保留状态色，不做位移抖動 */
@media (prefers-reduced-motion: reduce) {
  .quiz-card.quiz-in,
  .quiz-opt.is-right,
  .quiz-opt.is-wrong,
  .quiz-opt.is-decoy-shake,
  .quiz-opt.is-decoy-escape,
  .quiz-opt.is-decoy-emoji .quiz-opt-key,
  .quiz-opt.is-decoy-shuffle .quiz-opt-key,
  .quiz-decoy-tag,
  .quiz-opt.is-decoy-point::after,
  .quiz-sysmsg,
  .quiz-auth,
  .quiz-opt.is-decoy-glow,
  .quiz-countdown,
  .quiz-cd-num { animation: none !important; }
}