/* ============================================================
   同济附中 · 学生端 /pad 拟真横屏刷脸背词终端样式
   - 拟真 iPad 横屏边框 + 灵动岛 + 全屏无边框模式
   - IPA 国际音标字体栈（零乱码保障）
   - 脑科学四区配色 / 扫描动画 / 半衰期跃迁动画
   ============================================================ */

:root {
  --bg-1: #0b1020;
  --bg-2: #101a33;
  --panel: rgba(255, 255, 255, 0.06);
  --panel-2: rgba(255, 255, 255, 0.1);
  --line: rgba(140, 170, 255, 0.22);
  --text: #eaf0ff;
  --text-dim: #9fb0d8;
  --blue: #4f8cff;
  --green: #34d399;
  --red: #ff5d6c;
  --amber: #ffb84f;
  --purple: #8b7bff;
  --ipa-font: 'Lucida Sans Unicode', 'Segoe UI', 'Arial Unicode MS', 'Gentium Plus', 'Charis SIL', sans-serif;
}

* { box-sizing: border-box; margin: 0; padding: 0; -webkit-tap-highlight-color: transparent; }

html, body { height: 100%; }

body {
  font-family: 'PingFang SC', 'Microsoft YaHei', 'Segoe UI', sans-serif;
  color: var(--text);
  background: var(--bg-1);
  overflow: hidden;
}

.stage-bg {
  position: fixed;
  inset: 0;
  background:
    radial-gradient(1200px 600px at 15% -10%, rgba(79, 140, 255, 0.25), transparent 60%),
    radial-gradient(900px 500px at 90% 110%, rgba(139, 123, 255, 0.2), transparent 60%),
    linear-gradient(160deg, var(--bg-1), var(--bg-2));
  z-index: 0;
}

.ipa { font-family: var(--ipa-font); }

mark { background: rgba(255, 184, 79, 0.35); color: #ffd9a0; border-radius: 4px; padding: 0 4px; }

/* ---------- 拟真 iPad 边框 ---------- */

.ipad-frame {
  position: relative;
  z-index: 1;
  width: min(96vw, 1280px);
  height: min(94vh, 840px);
  margin: 2.6vh auto;
  border-radius: 34px;
  border: 3px solid #2a3247;
  background: linear-gradient(180deg, #0d1326, #0a0f1f);
  box-shadow:
    0 0 0 8px #171d30,
    0 0 0 10px #232b42,
    0 30px 80px rgba(0, 0, 0, 0.6),
    inset 0 0 60px rgba(20, 40, 90, 0.35);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  transition: border-radius 0.3s, box-shadow 0.3s;
}

.ipad-frame.borderless {
  width: 100vw;
  height: 100vh;
  margin: 0;
  border-radius: 0;
  box-shadow: none;
}

.pad-status {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 10px 22px;
  font-size: 14px;
  color: var(--text-dim);
  border-bottom: 1px solid var(--line);
  background: rgba(10, 16, 34, 0.7);
}

.island {
  position: relative;
  width: 92px;
  height: 24px;
  border-radius: 14px;
  background: #05070d;
  border: 1px solid #1c2438;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.cam-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: radial-gradient(circle at 35% 35%, #3b5a8f, #0a0f1a 70%);
  box-shadow: 0 0 6px rgba(90, 140, 255, 0.7);
}

.status-icons { margin-left: auto; letter-spacing: 4px; }

.fs-btn {
  border: 1px solid var(--line);
  background: transparent;
  color: var(--text-dim);
  border-radius: 8px;
  padding: 4px 10px;
  cursor: pointer;
  font-size: 13px;
}
.fs-btn:hover { color: var(--text); border-color: var(--blue); }

.pad-stage { position: relative; flex: 1; overflow: hidden; }

.home-indicator {
  height: 18px;
  display: flex;
  align-items: center;
  justify-content: center;
}
.home-indicator::after {
  content: '';
  width: 140px;
  height: 5px;
  border-radius: 3px;
  background: rgba(255, 255, 255, 0.25);
}

/* ---------- 屏幕切换 ---------- */

.screen {
  position: absolute;
  inset: 0;
  display: none;
  padding: 18px 26px;
  overflow-y: auto;
  animation: fadeIn 0.35s ease;
}
.screen.active { display: block; }

@keyframes fadeIn { from { opacity: 0; transform: translateY(10px); } to { opacity: 1; transform: none; } }

/* ---------- 通用按钮 ---------- */

.btn {
  border: 1px solid var(--line);
  background: var(--panel);
  color: var(--text);
  border-radius: 12px;
  padding: 10px 18px;
  font-size: 15px;
  cursor: pointer;
  transition: transform 0.12s, box-shadow 0.2s, background 0.2s;
}
.btn:hover { transform: translateY(-1px); background: var(--panel-2); }
.btn:active { transform: scale(0.97); }
.btn.primary, .btn-primary {
  background: linear-gradient(135deg, #3f7bff, #5f8dff);
  border-color: transparent;
  box-shadow: 0 8px 24px rgba(63, 123, 255, 0.35);
}
.btn-outline {
  border-color: var(--blue);
  color: #bcd2ff;
  background: rgba(79, 140, 255, 0.08);
}
.btn-ghost { background: transparent; }
.btn-danger {
  background: linear-gradient(135deg, #ff5d6c, #ff8562);
  border-color: transparent;
  box-shadow: 0 10px 30px rgba(255, 93, 108, 0.4);
}
.btn-sim { background: rgba(139, 123, 255, 0.18); border-color: rgba(139, 123, 255, 0.5); color: #cabfff; }
.btn.dim { opacity: 0.7; }
.btn.small { padding: 6px 12px; font-size: 13px; }
.btn.big { padding: 14px 26px; font-size: 17px; }
.block-btn { display: block; width: 100%; margin-bottom: 14px; }

.row-btns { display: flex; gap: 12px; margin-top: 14px; flex-wrap: wrap; }
.row-btns.center { justify-content: center; }

/* ---------- ① 刷脸登录 ---------- */

.login-grid {
  display: grid;
  grid-template-columns: 1.15fr 1fr;
  gap: 34px;
  height: 100%;
  align-items: stretch;
}

.brand { font-size: 26px; margin-bottom: 6px; }
.brand-sub { color: var(--text-dim); margin-bottom: 16px; }

.face-wrap {
  position: relative;
  height: 54%;
  min-height: 260px;
  border-radius: 20px;
  overflow: hidden;
  border: 1px solid var(--line);
  background: radial-gradient(400px 260px at 50% 40%, #16224a, #0a0f1f);
}
#cam { width: 100%; height: 100%; object-fit: cover; opacity: 0.9; }

.scan-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(120, 170, 255, 0.16) 1px, transparent 1px),
    linear-gradient(90deg, rgba(120, 170, 255, 0.16) 1px, transparent 1px);
  background-size: 34px 34px;
  pointer-events: none;
}

.scan-beam {
  position: absolute;
  left: 0;
  right: 0;
  top: -8%;
  height: 8%;
  background: linear-gradient(180deg, transparent, rgba(90, 160, 255, 0.55), transparent);
  filter: blur(1px);
  animation: beam 2.2s ease-in-out infinite;
  pointer-events: none;
}
.face-wrap.scanning .scan-beam { animation-duration: 0.6s; background: linear-gradient(180deg, transparent, rgba(120, 255, 190, 0.8), transparent); }

@keyframes beam { 0% { top: -8%; } 100% { top: 104%; } }

.scan-tip {
  position: absolute;
  bottom: 10px;
  left: 0;
  right: 0;
  text-align: center;
  font-size: 13px;
  color: #a9c2ff;
  letter-spacing: 2px;
}

/* 无摄像头降级：动态数字人脸 */
.digital-face { display: none; position: absolute; inset: 0; }
.face-wrap.no-cam #cam { display: none; }
.face-wrap.no-cam .digital-face { display: block; }

.digital-face .df-head {
  position: absolute;
  top: 18%;
  left: 50%;
  transform: translateX(-50%);
  width: 150px;
  height: 190px;
  border-radius: 46% 46% 42% 42%;
  border: 2px solid rgba(110, 160, 255, 0.7);
  box-shadow: 0 0 40px rgba(80, 140, 255, 0.35), inset 0 0 30px rgba(80, 140, 255, 0.15);
  animation: floatFace 3.5s ease-in-out infinite;
}
.df-eye {
  position: absolute;
  top: 42%;
  width: 18px;
  height: 10px;
  border-radius: 50%;
  background: rgba(120, 255, 210, 0.9);
  box-shadow: 0 0 12px rgba(120, 255, 210, 0.8);
  animation: blink 3.2s infinite;
}
.df-eye.l { left: 38%; }
.df-eye.r { right: 38%; }
.df-mouth {
  position: absolute;
  top: 66%;
  left: 50%;
  transform: translateX(-50%);
  width: 46px;
  height: 12px;
  border-bottom: 3px solid rgba(120, 255, 210, 0.85);
  border-radius: 0 0 30px 30px;
}
@keyframes floatFace { 0%, 100% { transform: translateX(-50%) translateY(0); } 50% { transform: translateX(-50%) translateY(-8px); } }
@keyframes blink { 0%, 92%, 100% { transform: scaleY(1); } 95% { transform: scaleY(0.1); } }

.side-title { font-size: 19px; margin-bottom: 4px; }
.side-sub { color: var(--text-dim); margin-bottom: 14px; }

.quick-list { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }

.quick-student {
  border: 1px solid var(--line);
  background: var(--panel);
  border-radius: 16px;
  padding: 16px 14px;
  color: var(--text);
  cursor: pointer;
  display: flex;
  flex-direction: column;
  gap: 6px;
  align-items: flex-start;
  transition: transform 0.15s, border-color 0.2s, box-shadow 0.2s;
}
.quick-student:hover {
  transform: translateY(-3px);
  border-color: var(--blue);
  box-shadow: 0 14px 34px rgba(63, 123, 255, 0.25);
}
.qs-face { font-size: 30px; }
.quick-student b { font-size: 17px; }
.qs-meta { color: var(--text-dim); font-size: 13px; }
.qs-tier { font-size: 12px; border-radius: 20px; padding: 2px 10px; }
.tier-a { background: rgba(52, 211, 153, 0.18); color: #7ff0c4; }
.tier-b { background: rgba(79, 140, 255, 0.18); color: #9cc0ff; }
.tier-c { background: rgba(255, 93, 108, 0.18); color: #ff9aa5; }

/* ---------- ② 看板 ---------- */

.dash-head { display: flex; align-items: center; gap: 22px; margin-bottom: 14px; }
.dash-hello h2 { font-size: 22px; }
.dash-persona { color: var(--text-dim); margin-top: 4px; }
.dash-stats { display: flex; gap: 16px; margin-left: auto; }
.stat {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 8px 18px;
  text-align: center;
}
.stat b { display: block; font-size: 20px; color: #9cc0ff; }
.stat span { font-size: 12px; color: var(--text-dim); }

.retake-alert {
  border: 1.5px solid rgba(255, 93, 108, 0.75);
  background: linear-gradient(135deg, rgba(255, 93, 108, 0.16), rgba(255, 133, 98, 0.1));
  border-radius: 18px;
  padding: 14px 20px;
  margin-bottom: 14px;
  animation: alertPulse 1.8s ease-in-out infinite;
}
@keyframes alertPulse {
  0%, 100% { box-shadow: 0 0 0 rgba(255, 93, 108, 0); }
  50% { box-shadow: 0 0 34px rgba(255, 93, 108, 0.45); }
}
.retake-head { font-size: 17px; font-weight: 700; color: #ffb3bb; margin-bottom: 6px; }
.retake-title { margin-bottom: 10px; font-size: 15px; }

.relief-banner {
  border: 1px solid rgba(120, 255, 210, 0.35);
  background: linear-gradient(135deg, rgba(52, 211, 153, 0.12), rgba(79, 140, 255, 0.1));
  border-radius: 14px;
  padding: 12px 18px;
  font-size: 15px;
  margin-bottom: 16px;
}
.relief-banner b { color: #7ff0c4; }

.dash-columns { display: grid; grid-template-columns: 1.5fr 1fr; gap: 18px; }

.zone-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }

.zone-card {
  border: 1px solid var(--line);
  border-radius: 16px;
  background: var(--panel);
  padding: 14px 16px;
  cursor: pointer;
  transition: transform 0.15s;
}
.zone-card:hover { transform: translateY(-2px); }
.z-red { border-top: 3px solid var(--red); }
.z-amber { border-top: 3px solid var(--amber); }
.z-blue { border-top: 3px solid var(--blue); }
.z-gray { border-top: 3px solid #8fa0c8; }

.zone-head { display: flex; justify-content: space-between; font-size: 15px; font-weight: 700; }
.zone-count { color: var(--text-dim); font-weight: 400; font-size: 13px; }
.zone-note { font-size: 12px; color: var(--text-dim); margin: 6px 0 8px; }
.zone-body { display: grid; gap: 6px; }
.zone-word {
  background: rgba(10, 16, 34, 0.5);
  border-radius: 10px;
  padding: 7px 10px;
  font-size: 13px;
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  align-items: baseline;
}
.zone-word .phon { color: #9cc0ff; }
.zone-word .zh { color: var(--text-dim); }
.zone-word .mem-param { color: #7ff0c4; font-size: 12px; }
.zone-empty { color: var(--text-dim); font-size: 13px; padding: 6px 0; }

.panel {
  border: 1px solid var(--line);
  border-radius: 16px;
  background: var(--panel);
  padding: 14px 16px;
  margin-bottom: 14px;
}
.panel h3 { font-size: 15px; margin-bottom: 10px; }

.weak-list { display: grid; gap: 8px; margin-bottom: 12px; }
.weak-item {
  background: rgba(10, 16, 34, 0.5);
  border-radius: 10px;
  padding: 8px 12px;
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 4px 10px;
  font-size: 13px;
}
.weak-word { color: #9cc0ff; font-family: var(--ipa-font); }
.weak-zh { color: var(--text); }
.weak-src { grid-column: 1 / -1; color: var(--text-dim); font-size: 12px; }

/* ---------- ③ 闯关 ---------- */

.quiz-head {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 16px;
}
.quiz-progress { font-size: 14px; color: #9cc0ff; }
.quiz-progress.dim { color: var(--text-dim); }

.mode-switch { display: flex; gap: 8px; margin-left: auto; }
.mode-switch button {
  border: 1px solid var(--line);
  background: transparent;
  color: var(--text-dim);
  border-radius: 20px;
  padding: 6px 14px;
  cursor: pointer;
  font-size: 13px;
}
.mode-switch button.on {
  background: rgba(79, 140, 255, 0.2);
  border-color: var(--blue);
  color: #cfe0ff;
}

.quiz-body {
  border: 1px solid var(--line);
  border-radius: 18px;
  background: var(--panel);
  padding: 22px 26px;
  min-height: 46%;
}

.quiz-mode-badge {
  display: inline-block;
  font-size: 13px;
  color: #cabfff;
  border: 1px solid rgba(139, 123, 255, 0.5);
  border-radius: 20px;
  padding: 3px 12px;
  margin-bottom: 14px;
}

.quiz-word { font-size: 34px; display: flex; align-items: baseline; gap: 14px; margin-bottom: 12px; }
.quiz-word .phon, .answer-line .phon { color: #9cc0ff; font-size: 20px; }

.btn-sound {
  border: none;
  background: rgba(79, 140, 255, 0.15);
  color: #9cc0ff;
  border-radius: 50%;
  width: 38px;
  height: 38px;
  font-size: 17px;
  cursor: pointer;
}

.quiz-context { font-size: 17px; line-height: 1.7; margin-bottom: 12px; }
.ctx-zh { color: var(--text-dim); font-size: 14px; }
.quiz-zh { font-size: 19px; margin-bottom: 12px; display: flex; align-items: center; gap: 10px; }
.quiz-hint { color: var(--text-dim); margin-bottom: 12px; }

.anchor {
  font-size: 26px;
  letter-spacing: 6px;
  color: #7ff0c4;
  margin-bottom: 12px;
}

.slots {
  min-height: 46px;
  border-bottom: 2px dashed var(--line);
  font-size: 26px;
  margin-bottom: 14px;
  color: #ffd9a0;
}
.slots.done { color: var(--green); border-color: var(--green); }

.blocks { display: flex; flex-wrap: wrap; gap: 10px; }
.block {
  border: 1px solid var(--line);
  background: var(--panel-2);
  color: var(--text);
  border-radius: 12px;
  padding: 10px 16px;
  font-size: 17px;
  font-family: var(--ipa-font);
  cursor: pointer;
}
.block:hover { border-color: var(--blue); }
.block.back { color: var(--text-dim); }

.opt-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.opt {
  text-align: left;
  border: 1px solid var(--line);
  background: rgba(10, 16, 34, 0.5);
  color: var(--text);
  border-radius: 12px;
  padding: 13px 16px;
  font-size: 15px;
  cursor: pointer;
}
.opt.picked { border-color: var(--blue); background: rgba(79, 140, 255, 0.18); }

.type-input {
  width: 100%;
  border: 1px solid var(--line);
  background: rgba(10, 16, 34, 0.6);
  color: var(--text);
  border-radius: 12px;
  padding: 13px 16px;
  font-size: 19px;
  outline: none;
}
.type-input:focus { border-color: var(--blue); box-shadow: 0 0 0 3px rgba(79, 140, 255, 0.2); }

.quiz-foot { margin-top: 16px; display: flex; justify-content: center; gap: 14px; }

/* ---------- ④ 揭晓与跃迁 ---------- */

.reveal-body {
  border: 1px solid var(--line);
  border-radius: 18px;
  background: var(--panel);
  padding: 24px 30px;
}

.verdict { font-size: 24px; font-weight: 800; margin-bottom: 12px; }
.verdict.pass { color: var(--green); }
.verdict.fail { color: var(--red); }

.answer-line { font-size: 34px; display: flex; align-items: baseline; gap: 14px; margin-bottom: 8px; }
.answer-speak { margin-bottom: 10px; }
.answer-zh { font-size: 18px; margin-bottom: 10px; }
.answer-ctx { font-size: 15px; line-height: 1.7; margin-bottom: 10px; }
.answer-tip { font-size: 13px; color: var(--text-dim); margin-bottom: 16px; }

.jump {
  border-radius: 14px;
  padding: 16px 20px;
  font-size: 16px;
  line-height: 1.8;
  animation: jumpPop 0.7s cubic-bezier(0.2, 1.4, 0.4, 1);
}
.jump b { font-size: 22px; }
.jump-pass { background: rgba(52, 211, 153, 0.12); border: 1px solid rgba(52, 211, 153, 0.5); color: #b8ffe4; }
.jump-fail { background: rgba(255, 93, 108, 0.12); border: 1px solid rgba(255, 93, 108, 0.5); color: #ffc2c9; }

@keyframes jumpPop { 0% { transform: scale(0.85); opacity: 0; } 60% { transform: scale(1.04); } 100% { transform: scale(1); opacity: 1; } }

/* ---------- ⑤ 战报 ---------- */

.report-body { text-align: center; padding: 30px 20px; }
.report-title { font-size: 26px; margin-bottom: 24px; }
.report-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; max-width: 860px; margin: 0 auto 22px; }
.report-cell {
  border: 1px solid var(--line);
  border-radius: 16px;
  background: var(--panel);
  padding: 20px 10px;
}
.report-cell b { display: block; font-size: 30px; color: #7ff0c4; margin-bottom: 6px; }
.report-cell span { color: var(--text-dim); font-size: 13px; }
.report-note { color: var(--text-dim); font-size: 13px; }

/* ---------- ⑥ 试卷列表 ---------- */

.page-head { display: flex; align-items: center; justify-content: space-between; margin-bottom: 18px; }
.papers-list { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.paper-card {
  text-align: left;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: var(--panel);
  color: var(--text);
  padding: 22px;
  cursor: pointer;
  display: grid;
  gap: 10px;
  transition: transform 0.15s, border-color 0.2s;
}
.paper-card:hover { transform: translateY(-3px); border-color: var(--blue); }
.paper-type { font-size: 13px; color: #ffd9a0; }
.paper-card b { font-size: 19px; }
.paper-meta { color: var(--text-dim); font-size: 13px; }

/* ---------- ⑦⑧ 试卷作答与结果 ---------- */

.pq-type { color: #ffd9a0; font-size: 14px; margin-bottom: 12px; }
.pq-prompt { font-size: 19px; line-height: 1.8; margin-bottom: 10px; }
.pq-prompt u { text-decoration-color: var(--amber); text-decoration-thickness: 3px; text-underline-offset: 5px; }
.pq-zh-big { font-size: 26px; font-weight: 700; margin-bottom: 10px; }
.pq-zh-tip { color: var(--text-dim); margin-bottom: 14px; }
.pq-picked { margin: 12px 0; font-size: 15px; color: #9cc0ff; }

.bank { display: flex; flex-wrap: wrap; gap: 10px; margin-bottom: 12px; }
.bank-chip {
  border: 1px solid var(--line);
  background: rgba(10, 16, 34, 0.5);
  color: var(--text);
  border-radius: 20px;
  padding: 7px 14px;
  cursor: pointer;
  font-family: var(--ipa-font);
  font-size: 14px;
}
.bank-chip.picked { border-color: var(--green); background: rgba(52, 211, 153, 0.15); }

.pr-score { font-size: 46px; font-weight: 800; color: #9cc0ff; }
.pr-score span { font-size: 16px; color: var(--text-dim); font-weight: 400; }
.pr-verdict { font-size: 20px; margin: 10px 0; }
.pr-verdict.pass { color: var(--green); }
.pr-verdict.fail { color: var(--red); }
.pr-wrong-title { margin: 18px 0 10px; font-size: 16px; }
.pr-wrong {
  border: 1px solid var(--line);
  border-radius: 12px;
  background: rgba(10, 16, 34, 0.5);
  padding: 10px 14px;
  margin-bottom: 8px;
  display: grid;
  gap: 4px;
  font-size: 14px;
}
.pr-q { color: var(--text); }
.pr-mine { color: #ff9aa5; }
.pr-std { color: #7ff0c4; }
.retake-cleared {
  border: 1px solid rgba(52, 211, 153, 0.6);
  background: rgba(52, 211, 153, 0.12);
  color: #7ff0c4;
  border-radius: 14px;
  padding: 14px 18px;
  font-size: 18px;
  margin: 12px 0;
}
.retake-failed {
  border: 1px solid rgba(255, 184, 79, 0.6);
  background: rgba(255, 184, 79, 0.1);
  color: #ffd9a0;
  border-radius: 14px;
  padding: 14px 18px;
  font-size: 15px;
  margin: 12px 0;
}

/* ---------- ⑨ 重默主流程 ---------- */

.retake-top { display: grid; gap: 6px; margin-bottom: 12px; }
.rt-title { font-size: 21px; font-weight: 800; color: #ffb3bb; }
.rt-meta { color: var(--text-dim); font-size: 13px; }

.rt-legend {
  border: 1px dashed var(--line);
  border-radius: 12px;
  color: var(--text-dim);
  font-size: 13px;
  padding: 9px 14px;
  margin-bottom: 14px;
}
.rt-legend b { color: #cabfff; }

.must-spell {
  display: inline-block;
  border: 1.5px solid var(--amber);
  background: rgba(255, 184, 79, 0.14);
  color: #ffd9a0;
  border-radius: 10px;
  padding: 8px 14px;
  font-size: 15px;
  font-weight: 700;
  margin-bottom: 14px;
  animation: alertPulse 2s infinite;
}

.mic-btn {
  display: block;
  width: 100%;
  padding: 26px 0;
  font-size: 21px;
  font-weight: 800;
  color: #eaf0ff;
  background: linear-gradient(135deg, rgba(139, 123, 255, 0.3), rgba(79, 140, 255, 0.3));
  border: 2px solid rgba(139, 123, 255, 0.6);
  border-radius: 18px;
  cursor: pointer;
  margin: 6px 0 10px;
  user-select: none;
  transition: transform 0.1s, box-shadow 0.2s;
}
.mic-btn:active { transform: scale(0.98); }
.mic-btn.rec {
  border-color: var(--red);
  box-shadow: 0 0 40px rgba(255, 93, 108, 0.5);
  animation: recPulse 1s infinite;
}
@keyframes recPulse { 50% { box-shadow: 0 0 18px rgba(255, 93, 108, 0.25); } }

.mic-state { text-align: center; color: var(--text-dim); font-size: 13px; margin-bottom: 10px; }

/* ---------- Issue #12：判分标准徽标 + 口述字母槽位 ---------- */

.grade-badge {
  display: inline-block;
  border-radius: 20px;
  padding: 4px 14px;
  font-size: 13px;
  margin: 4px 0 12px;
}
.grade-badge.ai { border: 1px solid rgba(139, 123, 255, 0.55); background: rgba(139, 123, 255, 0.14); color: #cabfff; }
.grade-badge.strict { border: 1px solid rgba(255, 184, 79, 0.55); background: rgba(255, 184, 79, 0.12); color: #ffd9a0; }

.spell-hint {
  color: #9cc0ff;
  font-size: 14px;
  margin-bottom: 12px;
  letter-spacing: 1px;
}

.letter-slots { display: flex; flex-wrap: wrap; gap: 8px; margin: 6px 0 14px; }

.letter-slot {
  width: 40px;
  height: 48px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 2px dashed var(--line);
  border-radius: 10px;
  background: rgba(10, 16, 34, 0.55);
  font-family: var(--ipa-font);
  font-size: 24px;
  font-weight: 700;
  color: #7ff0c4;
}
.letter-slot.filled {
  border-style: solid;
  border-color: var(--green);
  background: rgba(52, 211, 153, 0.12);
  animation: slotPop 0.25s cubic-bezier(0.2, 1.5, 0.4, 1);
}

@keyframes slotPop { from { transform: scale(0.5); opacity: 0.2; } to { transform: scale(1); opacity: 1; } }

.rt-grade-feedback {
  border: 1px solid var(--line);
  border-radius: 12px;
  background: rgba(10, 16, 34, 0.5);
  padding: 10px 14px;
  font-size: 14px;
  margin: 12px 0 8px;
  color: #cfe0ff;
}

.mic-btn.small { padding: 14px 0; font-size: 16px; }
.mic-btn:disabled { opacity: 0.6; cursor: not-allowed; }

.rt-verdict { font-size: 22px; font-weight: 800; margin: 16px 0 8px; }
.rt-verdict.pass { color: var(--green); }
.rt-verdict.fail { color: var(--red); }
.rt-answer { font-size: 17px; color: #9cc0ff; }

.retake-pass-big {
  font-size: 30px;
  font-weight: 900;
  color: #7ff0c4;
  margin: 16px 0;
  animation: jumpPop 0.7s cubic-bezier(0.2, 1.4, 0.4, 1);
}
.retake-fail-big { font-size: 26px; font-weight: 800; color: var(--red); margin: 14px 0; }
.confetti { font-size: 40px; letter-spacing: 18px; animation: jumpPop 0.9s; }

/* ---------- Toast ---------- */

.toast {
  position: fixed;
  left: 50%;
  bottom: 46px;
  transform: translateX(-50%) translateY(30px);
  background: rgba(16, 26, 51, 0.95);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 12px 22px;
  font-size: 15px;
  opacity: 0;
  pointer-events: none;
  transition: all 0.3s;
  z-index: 99;
  max-width: 80vw;
}
.toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }
.toast.ok { border-color: rgba(52, 211, 153, 0.6); }

/* ---------- 响应式 ---------- */

@media (max-width: 1100px) {
  .login-grid, .dash-columns { grid-template-columns: 1fr; }
  .report-grid { grid-template-columns: repeat(2, 1fr); }
  .papers-list { grid-template-columns: 1fr; }
  .quick-list { grid-template-columns: 1fr; }
}

@media (orientation: portrait) and (max-width: 900px) {
  .ipad-frame { width: 96vw; height: 92vh; }
}

/* 全屏无边框模式下去除留白 */
:fullscreen .ipad-frame.borderless { margin: 0; }