/* ============================================================
   闯关间 · 设计系统
   游戏化 + 高可读性。第一关要盯着文字读，所以正文对比度优先。
   第二关单独用 .dark-stage 变暗。
   ============================================================ */

:root {
  /* 底色 */
  --bg: #F5F3FF;
  --bg-alt: #EDE9FE;
  --surface: #FFFFFF;
  --surface-2: #FAFAFF;

  /* 文字 */
  --ink: #1E1B39;
  --ink-2: #5B5775;
  --ink-3: #918DAE;
  --ink-inv: #FFFFFF;

  /* 主色 · 靛紫 */
  --primary: #6C4CF1;
  --primary-d: #5433DB;
  --primary-l: #EDE9FE;

  /* 强调 · 勋章金 */
  --gold: #F7B32B;
  --gold-d: #C9860A;
  --gold-l: #FEF3C7;

  /* 强调 · 勋章银 */
  --silver: #A8B4C4;
  --silver-d: #6B7A8F;
  --silver-l: #EEF2F7;

  /* 语义 */
  --mint: #10B981;
  --mint-l: #D1FAE5;
  --rose: #F43F5E;
  --rose-l: #FFE4E6;
  --sky: #0EA5E9;

  /* 圆角 */
  --r-sm: 10px;
  --r-md: 14px;
  --r-lg: 20px;
  --r-xl: 28px;
  --r-full: 999px;

  /* 间距 */
  --sp-1: 6px;
  --sp-2: 10px;
  --sp-3: 16px;
  --sp-4: 24px;
  --sp-5: 36px;
  --sp-6: 56px;

  /* 阴影 */
  --sh-sm: 0 2px 8px rgba(30, 27, 57, .06);
  --sh-md: 0 8px 24px rgba(30, 27, 57, .10);
  --sh-lg: 0 18px 48px rgba(30, 27, 57, .16);

  /* 字体 */
  --font-sans: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", -apple-system,
               BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-num: "DIN Alternate", "SF Mono", Menlo, Consolas, monospace;

  /* 动效 */
  --ease: cubic-bezier(.22, 1, .36, 1);
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
}

body {
  font-family: var(--font-sans);
  background: var(--bg);
  color: var(--ink);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
}

/* 背景装饰：柔和光斑 */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  background:
    radial-gradient(680px 380px at 12% -8%, rgba(108, 76, 241, .13), transparent 62%),
    radial-gradient(560px 340px at 92% 4%, rgba(247, 179, 43, .12), transparent 60%);
}

img { max-width: 100%; display: block; }
a { color: var(--primary-d); text-decoration: none; }

:focus-visible {
  outline: 3px solid var(--primary);
  outline-offset: 2px;
  border-radius: 6px;
}

.sr-only {
  position: absolute; width: 1px; height: 1px;
  padding: 0; margin: -1px; overflow: hidden;
  clip: rect(0 0 0 0); white-space: nowrap; border: 0;
}

/* ============================================================
   布局壳
   ============================================================ */

.topbar {
  position: sticky;
  top: 0;
  z-index: 50;
  display: flex;
  align-items: center;
  gap: var(--sp-3);
  padding: 12px clamp(16px, 4vw, 40px);
  background: rgba(255, 255, 255, .82);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(30, 27, 57, .07);
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 17px;
  font-weight: 700;
  color: var(--ink);
  letter-spacing: .5px;
  flex-shrink: 0;
}

.brand-mark {
  width: 34px;
  height: 34px;
  display: grid;
  place-items: center;
  border-radius: 11px;
  background: linear-gradient(140deg, var(--primary) 0%, #9B6CFF 100%);
  color: #fff;
  font-size: 17px;
  box-shadow: 0 4px 12px rgba(108, 76, 241, .35);
}

.topnav {
  display: flex;
  gap: 4px;
  margin-left: auto;
  overflow-x: auto;
  scrollbar-width: none;
}
.topnav::-webkit-scrollbar { display: none; }

.topnav a {
  padding: 7px 14px;
  border-radius: var(--r-full);
  font-size: 14px;
  color: var(--ink-2);
  white-space: nowrap;
  transition: background .2s var(--ease), color .2s var(--ease);
}
.topnav a:hover { background: var(--bg-alt); color: var(--ink); }
.topnav a[aria-current="page"] {
  background: var(--primary);
  color: #fff;
  font-weight: 600;
}

.streak-chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 13px;
  border-radius: var(--r-full);
  background: var(--gold-l);
  color: var(--gold-d);
  font-size: 13px;
  font-weight: 700;
  flex-shrink: 0;
}
.streak-chip svg { width: 15px; height: 15px; }

.page {
  position: relative;
  z-index: 1;
  width: 100%;
  max-width: 940px;
  margin: 0 auto;
  padding: var(--sp-5) clamp(16px, 4vw, 32px) var(--sp-6);
  flex: 1;
}

.page-wide { max-width: 1140px; }

.page-head { margin-bottom: var(--sp-5); }

.page-title {
  font-size: clamp(25px, 5vw, 34px);
  font-weight: 800;
  line-height: 1.25;
  margin: 0 0 6px;
  letter-spacing: -.5px;
}

.page-sub {
  font-size: 15px;
  color: var(--ink-2);
  margin: 0;
}

/* ============================================================
   按钮
   ============================================================ */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 24px;
  border: none;
  border-radius: var(--r-full);
  font-family: inherit;
  font-size: 15px;
  font-weight: 700;
  cursor: pointer;
  transition: transform .16s var(--ease), box-shadow .16s var(--ease), opacity .16s;
  white-space: nowrap;
}
.btn:active { transform: scale(.97); }
.btn:disabled { opacity: .45; cursor: not-allowed; transform: none; }

.btn-primary {
  background: var(--primary);
  color: #fff;
  box-shadow: 0 6px 18px rgba(108, 76, 241, .32);
}
.btn-primary:hover:not(:disabled) { background: var(--primary-d); box-shadow: 0 10px 26px rgba(108, 76, 241, .4); }

.btn-gold {
  background: linear-gradient(135deg, #FFC94D 0%, var(--gold) 100%);
  color: #5A3B00;
  box-shadow: 0 6px 18px rgba(247, 179, 43, .4);
}
.btn-gold:hover:not(:disabled) { filter: brightness(1.05); }

.btn-ghost {
  background: var(--surface);
  color: var(--ink-2);
  border: 1.5px solid rgba(30, 27, 57, .12);
}
.btn-ghost:hover:not(:disabled) { border-color: var(--primary); color: var(--primary-d); }

.btn-danger {
  background: var(--rose-l);
  color: #A81229;
}
.btn-danger:hover:not(:disabled) { background: #FFCBD1; }

.btn-lg { padding: 16px 38px; font-size: 17px; }
.btn-sm { padding: 8px 16px; font-size: 13px; }
.btn-block { width: 100%; }

.btn svg { width: 18px; height: 18px; }

/* ============================================================
   卡片
   ============================================================ */

.card {
  background: var(--surface);
  border-radius: var(--r-lg);
  padding: var(--sp-4);
  box-shadow: var(--sh-sm);
  border: 1px solid rgba(30, 27, 57, .05);
}

.card-pad-lg { padding: var(--sp-5); }

/* ============================================================
   今日进度条
   ============================================================ */

.today-bar {
  display: flex;
  align-items: center;
  gap: var(--sp-3);
  padding: 14px 18px;
  background: var(--surface);
  border-radius: var(--r-lg);
  box-shadow: var(--sh-sm);
  margin-bottom: var(--sp-4);
  flex-wrap: wrap;
}

.today-bar .label {
  font-size: 13px;
  color: var(--ink-3);
  font-weight: 600;
}

.steps { display: flex; align-items: center; gap: 8px; margin-left: auto; }

.step-dot {
  width: 30px; height: 30px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  font-size: 13px;
  font-weight: 700;
  background: var(--bg-alt);
  color: var(--ink-3);
  transition: all .3s var(--ease);
}
.step-dot.done { background: var(--mint); color: #fff; }
.step-dot.active {
  background: var(--primary);
  color: #fff;
  box-shadow: 0 0 0 5px rgba(108, 76, 241, .18);
}

.step-line { width: 26px; height: 3px; background: var(--bg-alt); border-radius: 2px; }
.step-line.done { background: var(--mint); }

/* ============================================================
   关卡卡片
   ============================================================ */

.level-list { display: grid; gap: var(--sp-3); }

.level-card {
  position: relative;
  display: flex;
  align-items: center;
  gap: var(--sp-4);
  padding: var(--sp-4);
  border-radius: var(--r-lg);
  background: var(--surface);
  border: 2px solid transparent;
  box-shadow: var(--sh-sm);
  overflow: hidden;
  transition: transform .2s var(--ease), box-shadow .2s var(--ease);
}

.level-card::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(120deg, rgba(108, 76, 241, .07), transparent 55%);
  pointer-events: none;
}

.level-card.unlocked { border-color: var(--primary); }
.level-card.unlocked:hover { transform: translateY(-3px); box-shadow: var(--sh-md); }

.level-card.locked { opacity: .62; }
.level-card.cleared { border-color: var(--mint); }

.level-icon {
  width: 60px; height: 60px;
  flex-shrink: 0;
  border-radius: 18px;
  display: grid;
  place-items: center;
  font-size: 27px;
  background: var(--bg-alt);
  position: relative;
  z-index: 1;
}
.level-card.locked .level-icon { background: #EFEEF5; }
.level-card.cleared .level-icon { background: var(--mint-l); }

.level-body { flex: 1; min-width: 0; position: relative; z-index: 1; }

.level-kicker {
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 1.5px;
  color: var(--primary-d);
  margin: 0 0 2px;
}
.level-card.cleared .level-kicker { color: #0B7A5C; }
.level-card.locked .level-kicker { color: var(--ink-3); }

.level-name {
  font-size: 19px;
  font-weight: 800;
  margin: 0 0 3px;
  letter-spacing: -.2px;
}

.level-desc { font-size: 13.5px; color: var(--ink-2); margin: 0; }

.threshold {
  display: inline-block;
  margin-top: 7px;
  padding: 3px 10px;
  border-radius: var(--r-full);
  background: var(--gold-l);
  color: var(--gold-d);
  font-size: 12px;
  font-weight: 700;
}

.level-action { flex-shrink: 0; position: relative; z-index: 1; }

.lock-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  color: var(--ink-3);
  font-weight: 600;
}

/* ============================================================
   闯关舞台
   ============================================================ */

.stage {
  background: var(--surface);
  border-radius: var(--r-xl);
  padding: clamp(22px, 5vw, 40px);
  box-shadow: var(--sh-md);
  position: relative;
}

.stage-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--sp-3);
  margin-bottom: var(--sp-4);
  flex-wrap: wrap;
}

.stage-title {
  font-size: 20px;
  font-weight: 800;
  margin: 0;
  display: flex;
  align-items: center;
  gap: 9px;
}

.pill {
  padding: 5px 13px;
  border-radius: var(--r-full);
  font-size: 12.5px;
  font-weight: 700;
}
.pill-level1 { background: var(--primary-l); color: var(--primary-d); }
.pill-level2 { background: #F3E8FF; color: #7E22CE; }
.pill-gold { background: var(--gold-l); color: var(--gold-d); }

/* 背诵原文 */
.passage {
  font-size: clamp(19px, 4.2vw, 25px);
  line-height: 2.05;
  letter-spacing: .8px;
  color: var(--ink);
  font-weight: 500;
  padding: var(--sp-4);
  background: var(--surface-2);
  border-radius: var(--r-md);
  border: 1.5px solid rgba(30, 27, 57, .06);
  margin: 0 0 var(--sp-4);
}

.passage .term {
  color: var(--primary-d);
  font-weight: 800;
}

/* 提示行 */
.hint-row {
  display: flex;
  align-items: center;
  gap: 9px;
  padding: 11px 15px;
  border-radius: var(--r-md);
  font-size: 14px;
  background: var(--primary-l);
  color: var(--primary-d);
  margin-bottom: var(--sp-4);
}
.hint-row.warn { background: var(--gold-l); color: var(--gold-d); }
.hint-row.ok { background: var(--mint-l); color: #0B7A5C; }
.hint-row svg { width: 17px; height: 17px; flex-shrink: 0; }

/* 录音控制 */
.rec-controls {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--sp-3);
  padding: var(--sp-4) 0;
}

.rec-btn {
  width: 96px; height: 96px;
  border-radius: 50%;
  border: none;
  background: var(--primary);
  color: #fff;
  display: grid;
  place-items: center;
  cursor: pointer;
  box-shadow: 0 10px 30px rgba(108, 76, 241, .38);
  transition: transform .18s var(--ease);
}
.rec-btn:hover { transform: scale(1.06); }
.rec-btn:disabled { opacity: .5; cursor: not-allowed; transform: none; }
.rec-btn svg { width: 38px; height: 38px; }

.rec-btn.recording {
  background: var(--rose);
  box-shadow: 0 0 0 0 rgba(244, 63, 94, .55);
  animation: pulse 1.5s var(--ease) infinite;
}

@keyframes pulse {
  0% { box-shadow: 0 0 0 0 rgba(244, 63, 94, .55); }
  70% { box-shadow: 0 0 0 22px rgba(244, 63, 94, 0); }
  100% { box-shadow: 0 0 0 0 rgba(244, 63, 94, 0); }
}

.rec-timer {
  font-family: var(--font-num);
  font-size: 32px;
  font-weight: 700;
  letter-spacing: 2px;
  color: var(--ink);
}

.rec-tip { font-size: 13.5px; color: var(--ink-3); text-align: center; margin: 0; }

/* 波形条（装饰） */
.wave {
  display: flex;
  align-items: flex-end;
  gap: 4px;
  height: 34px;
  justify-content: center;
}
.wave span {
  width: 4px;
  border-radius: 2px;
  background: var(--primary);
  height: 6px;
  transition: height .18s linear;
}
.wave.live span { background: var(--rose); }

/* ============================================================
   摄像头 / 闭眼检测区
   ============================================================ */

.cam-wrap {
  position: relative;
  width: 100%;
  max-width: 340px;
  margin: 0 auto var(--sp-4);
  aspect-ratio: 3 / 4;
  border-radius: var(--r-lg);
  overflow: hidden;
  background: #161226;
  box-shadow: var(--sh-md);
}

.cam-wrap video,
.cam-wrap canvas {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.cam-overlay {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 8px;
  pointer-events: none;
  color: #fff;
  text-align: center;
  padding: 16px;
}

.cam-status {
  padding: 7px 16px;
  border-radius: var(--r-full);
  font-size: 13.5px;
  font-weight: 700;
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  background: rgba(0, 0, 0, .42);
}
.cam-status.ok { background: rgba(16, 185, 129, .88); }
.cam-status.bad { background: rgba(244, 63, 94, .9); }

.cam-guide {
  width: 58%;
  aspect-ratio: 3 / 4;
  border: 2px dashed rgba(255, 255, 255, .38);
  border-radius: 46% 46% 50% 50%;
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -54%);
  pointer-events: none;
}

.cam-wrap.state-eyes-open .cam-guide { border-color: var(--rose); }

/* ============================================================
   结果面板
   ============================================================ */

.result {
  text-align: center;
  padding: var(--sp-3) 0;
}

.score-ring {
  width: 150px; height: 150px;
  margin: 0 auto var(--sp-3);
  position: relative;
}
.score-ring svg { width: 100%; height: 100%; transform: rotate(-90deg); }
.score-ring .track { stroke: var(--bg-alt); }
.score-ring .bar { stroke-linecap: round; transition: stroke-dashoffset .9s var(--ease); }

.score-num {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  font-family: var(--font-num);
  font-size: 40px;
  font-weight: 700;
  letter-spacing: -1px;
}
.score-num small { font-size: 17px; color: var(--ink-3); }

.verdict {
  font-size: 26px;
  font-weight: 800;
  margin: 0 0 4px;
}
.verdict.pass { color: var(--mint); }
.verdict.fail { color: var(--rose); }

.verdict-sub { font-size: 14.5px; color: var(--ink-2); margin: 0 0 var(--sp-4); }

.stat-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(84px, 1fr));
  gap: var(--sp-2);
  margin-bottom: var(--sp-4);
}

.stat {
  padding: 11px 8px;
  border-radius: var(--r-md);
  background: var(--surface-2);
  border: 1px solid rgba(30, 27, 57, .05);
}
.stat b {
  display: block;
  font-family: var(--font-num);
  font-size: 21px;
  font-weight: 700;
  line-height: 1.2;
}
.stat span { font-size: 12px; color: var(--ink-3); }

/* 逐字对照 */
.diff {
  text-align: left;
  font-size: 17px;
  line-height: 2.1;
  padding: var(--sp-3);
  background: var(--surface-2);
  border-radius: var(--r-md);
  margin-bottom: var(--sp-4);
  letter-spacing: .5px;
}
.diff .hit { color: var(--ink); }
.diff .miss {
  color: var(--rose);
  text-decoration: underline wavy var(--rose) 1.5px;
  text-underline-offset: 4px;
  font-weight: 700;
}
.diff .extra {
  color: var(--sky);
  background: #E0F2FE;
  border-radius: 4px;
  padding: 0 2px;
}
.diff .filler { color: var(--ink-3); opacity: .65; }

.diff-legend {
  display: flex;
  flex-wrap: wrap;
  gap: var(--sp-3);
  font-size: 12.5px;
  color: var(--ink-2);
  margin-bottom: var(--sp-3);
}
.diff-legend i {
  display: inline-block;
  width: 11px; height: 11px;
  border-radius: 3px;
  margin-right: 5px;
  vertical-align: -1px;
}

/* ============================================================
   勋章墙
   ============================================================ */

.medal-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(116px, 1fr));
  gap: var(--sp-3);
}

.medal {
  text-align: center;
  padding: var(--sp-3) 8px;
  border-radius: var(--r-lg);
  background: var(--surface);
  border: 1.5px solid rgba(30, 27, 57, .06);
  transition: transform .2s var(--ease);
}
.medal.earned { border-color: var(--gold); box-shadow: 0 6px 18px rgba(247, 179, 43, .2); }
.medal.earned:hover { transform: translateY(-4px); }

/* 银勋章：只过了第一关 */
.medal.silver { border-color: var(--silver); box-shadow: 0 6px 18px rgba(168, 180, 196, .28); }
.medal.silver .medal-disc {
  background: linear-gradient(140deg, #E7EDF5 0%, var(--silver) 55%, var(--silver-d) 100%);
}
.medal.silver .medal-name { color: var(--silver-d); }
/* 金勋章：两关全通 */
.medal.gold { border-color: var(--gold); box-shadow: 0 8px 22px rgba(247, 179, 43, .3); }
.medal.gold .medal-name { color: var(--gold-d); }

.medal-disc {
  width: 62px; height: 62px;
  margin: 0 auto 9px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  font-size: 27px;
  background: linear-gradient(140deg, #FFDD8A 0%, var(--gold) 55%, var(--gold-d) 100%);
  box-shadow: inset 0 -3px 6px rgba(0, 0, 0, .13);
}
.medal.locked .medal-disc {
  background: #EEECF4;
  box-shadow: none;
  color: var(--ink-3);
  filter: grayscale(1);
  opacity: .55;
}

.medal-name { font-size: 13.5px; font-weight: 700; margin: 0 0 2px; }
.medal-date { font-size: 11.5px; color: var(--ink-3); margin: 0; }
.medal-tag {
  display: inline-block;
  margin-top: 5px;
  padding: 1px 7px;
  border-radius: var(--r-full);
  font-size: 10.5px;
  font-weight: 700;
  letter-spacing: .3px;
}
.medal-tag.silver { background: var(--silver-l); color: var(--silver-d); }
.medal-tag.gold { background: var(--gold-l); color: var(--gold-d); }

/* 银 / 金 两类统计卡 */
.stat-card.silver b { color: var(--silver-d); }
.stat-card.gold b { color: var(--gold-d); }

/* 统计卡 */
.stat-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(130px, 1fr));
  gap: var(--sp-3);
  margin-bottom: var(--sp-5);
}

.stat-card {
  padding: var(--sp-3);
  border-radius: var(--r-lg);
  background: var(--surface);
  border: 1px solid rgba(30, 27, 57, .05);
  text-align: center;
}
.stat-card b {
  display: block;
  font-family: var(--font-num);
  font-size: 30px;
  font-weight: 700;
  line-height: 1.15;
  color: var(--primary-d);
}
.stat-card.gold b { color: var(--gold-d); }
.stat-card.mint b { color: #0B7A5C; }
.stat-card span { font-size: 13px; color: var(--ink-2); }

/* ============================================================
   管理后台
   ============================================================ */

.admin-tabs {
  display: flex;
  gap: 6px;
  padding: 5px;
  background: var(--bg-alt);
  border-radius: var(--r-full);
  margin-bottom: var(--sp-4);
  flex-wrap: wrap;
}
.admin-tabs button {
  flex: 1;
  min-width: 88px;
  padding: 9px 14px;
  border: none;
  border-radius: var(--r-full);
  background: transparent;
  font-family: inherit;
  font-size: 14px;
  font-weight: 600;
  color: var(--ink-2);
  cursor: pointer;
  transition: all .2s var(--ease);
}
.admin-tabs button[aria-selected="true"] {
  background: var(--surface);
  color: var(--primary-d);
  box-shadow: var(--sh-sm);
}

.chip {
  display: inline-block;
  padding: 3px 11px;
  border-radius: var(--r-full);
  font-size: 12px;
  font-weight: 700;
  white-space: nowrap;
}
.chip-draft { background: #EEECF4; color: var(--ink-2); }
.chip-pending { background: var(--gold-l); color: var(--gold-d); }
.chip-published { background: var(--mint-l); color: #0B7A5C; }

.qlist { display: grid; gap: var(--sp-2); }

.qitem {
  padding: var(--sp-3);
  border-radius: var(--r-md);
  background: var(--surface);
  border: 1.5px solid rgba(30, 27, 57, .06);
}

.qitem-head {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 8px;
  flex-wrap: wrap;
}

.qitem-title { font-size: 15.5px; font-weight: 700; margin: 0; flex: 1; min-width: 140px; }

.qitem-body { font-size: 14px; color: var(--ink-2); margin: 0 0 8px; line-height: 1.75; }

.qitem-foot {
  display: flex;
  gap: 8px;
  align-items: center;
  flex-wrap: wrap;
}
.qitem-foot .meta { font-size: 12.5px; color: var(--ink-3); margin-right: auto; }

/* 表单 */
.field { margin-bottom: var(--sp-3); }
.field label {
  display: block;
  font-size: 13.5px;
  font-weight: 600;
  color: var(--ink-2);
  margin-bottom: 6px;
}
.field input,
.field textarea,
.field select {
  width: 100%;
  padding: 11px 14px;
  border: 1.5px solid rgba(30, 27, 57, .13);
  border-radius: var(--r-md);
  font-family: inherit;
  font-size: 15px;
  color: var(--ink);
  background: var(--surface);
  transition: border-color .2s var(--ease);
  resize: vertical;
}
.field input:focus,
.field textarea:focus,
.field select:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(108, 76, 241, .13);
}
.field textarea { min-height: 108px; line-height: 1.75; }

.field-row { display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); gap: var(--sp-3); }

/* ============================================================
   通用
   ============================================================ */

.row-between {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--sp-3);
  flex-wrap: wrap;
}

.center { text-align: center; }
.mt-0 { margin-top: 0; }
.mb-0 { margin-bottom: 0; }
.mt-4 { margin-top: var(--sp-4); }
.mb-4 { margin-bottom: var(--sp-4); }

.empty {
  text-align: center;
  padding: var(--sp-6) var(--sp-3);
  color: var(--ink-3);
}
.empty .emo { font-size: 44px; display: block; margin-bottom: 10px; }

.toast {
  position: fixed;
  left: 50%;
  bottom: 26px;
  transform: translateX(-50%) translateY(20px);
  padding: 12px 24px;
  border-radius: var(--r-full);
  background: var(--ink);
  color: #fff;
  font-size: 14.5px;
  font-weight: 600;
  box-shadow: var(--sh-lg);
  opacity: 0;
  pointer-events: none;
  transition: all .3s var(--ease);
  z-index: 200;
}
.toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }

.site-foot {
  position: relative;
  z-index: 1;
  text-align: center;
  padding: var(--sp-4);
  font-size: 13px;
  color: var(--ink-3);
  border-top: 1px solid rgba(30, 27, 57, .06);
}

/* ============================================================
   第二关：闭眼暗场
   ============================================================ */

.stage.dark-stage {
  background: #1B1733;
  color: #F4F2FF;
}
.dark-stage .passage {
  background: rgba(255, 255, 255, .05);
  border-color: rgba(255, 255, 255, .1);
  color: #F4F2FF;
}
.dark-stage .stage-title { color: #FFF; }
.dark-stage .rec-timer { color: #FFF; }
.dark-stage .rec-tip { color: #A9A2CC; }
.dark-stage .hint-row { background: rgba(255, 255, 255, .08); color: #CFC8F0; }

/* ============================================================
   响应式：手机优先，桌面延展
   ============================================================ */

@media (max-width: 640px) {
  .level-card { flex-wrap: wrap; gap: var(--sp-3); }
  .level-icon { width: 50px; height: 50px; font-size: 23px; border-radius: 15px; }
  .level-action { width: 100%; }
  .level-action .btn { width: 100%; }
  .today-bar { gap: 10px; }
  .steps { width: 100%; justify-content: center; margin-left: 0; }
  .rec-btn { width: 82px; height: 82px; }
  .rec-btn svg { width: 32px; height: 32px; }
  .stat-card b { font-size: 25px; }
}

@media (min-width: 900px) {
  .passage { font-size: 25px; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: .01ms !important;
    transition-duration: .01ms !important;
  }
}