/* 版式与配色：随题号推进由“白日蓝”过渡到“湾区金” */
* { box-sizing: border-box; }

html, body {
  margin: 0;
  min-height: 100%;
  font-family: var(--font);
  color: #eef4fb;
  background: var(--blue-900);
}

body { background-attachment: fixed; }
body[data-tone="boot"], body[data-tone="default"] {
  background: radial-gradient(1200px 600px at 20% -10%, #1b4f9c 0%, #0d2a52 45%, #08213f 100%);
}
body[data-tone="day"] { background: linear-gradient(160deg, #2c6fae 0%, #123a6b 60%, #08213f 100%); }
body[data-tone="dusk"] { background: linear-gradient(160deg, #1b4f9c 0%, #132f5c 55%, #061a33 100%); }
body[data-tone="gold"] { background: linear-gradient(160deg, #2b4b86 0%, #4a3b28 55%, #0b1a30 100%); }

.app { max-width: var(--maxw); margin: 0 auto; padding: 18px 16px 40px; min-height: 100vh; }

.page { display: flex; flex-direction: column; gap: 16px; }
.page__body { display: flex; flex-direction: column; gap: 14px; }
.page__foot { font-size: 12px; line-height: 1.7; color: rgba(238, 244, 251, 0.55); border-top: 1px solid var(--line); padding-top: 12px; }

.appbar { display: flex; align-items: center; gap: 12px; }
.appbar__title { font-size: 20px; margin: 0; flex: 1; letter-spacing: 1px; }
.appbar__player { display: flex; align-items: center; gap: 8px; font-size: 14px; }
.appbar__spacer { width: 84px; }

.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 16px;
  box-shadow: var(--shadow);
  backdrop-filter: blur(6px);
}
.card__title { margin: 0 0 12px; font-size: 15px; color: var(--gold-300); letter-spacing: 1px; }

.btn {
  font: inherit; color: #eef4fb; cursor: pointer;
  padding: 11px 18px; border-radius: var(--radius-sm);
  border: 1px solid var(--line); background: rgba(255, 255, 255, 0.1);
  transition: transform 0.12s ease, background 0.2s ease, opacity 0.2s;
}
.btn:hover { background: rgba(255, 255, 255, 0.18); }
.btn:active { transform: scale(0.98); }
.btn--primary { background: linear-gradient(180deg, var(--gold-500), #b7822a); border-color: transparent; color: #241a06; font-weight: 700; }
.btn--warn { background: linear-gradient(180deg, var(--coral-500), #9d3a29); border-color: transparent; font-weight: 700; }
.btn--ghost { background: transparent; }
.btn.is-disabled, .btn:disabled { opacity: 0.4; cursor: not-allowed; }

.avatar { display: inline-grid; place-items: center; border-radius: 50%; overflow: hidden; border: 2px solid var(--gold-300); background: #0b2340; }
.avatar svg { width: 100%; height: 100%; display: block; }
.avatar__img { width: 100%; height: 100%; object-fit: cover; display: block; }
.avatar--sm { width: 30px; height: 30px; }
.avatar--md { width: 52px; height: 52px; }
.avatar--lg { width: 74px; height: 74px; }

.coins { color: var(--gold-300); font-weight: 700; }
.muted { color: rgba(238, 244, 251, 0.62); font-size: 13px; line-height: 1.7; }
.alert { margin: 10px 0 0; padding: 10px 12px; border-radius: var(--radius-sm); background: rgba(212, 85, 63, 0.18); border: 1px solid rgba(212, 85, 63, 0.5); font-size: 13px; line-height: 1.6; }
.cta { display: flex; flex-direction: column; gap: 10px; align-items: flex-start; }
.rules, .list { margin: 0; padding-left: 20px; font-size: 14px; line-height: 1.9; }
.list--compact { line-height: 1.7; font-size: 13px; }
.field { display: block; margin-bottom: 8px; font-size: 13px; }
.field__label { display: block; margin-bottom: 8px; color: rgba(238, 244, 251, 0.75); }
.field__input { width: 100%; padding: 12px; border-radius: var(--radius-sm); border: 1px solid var(--line); background: rgba(255, 255, 255, 0.12); color: #fff; font: inherit; }

.hero__slogan { margin: 0 0 14px; font-size: 18px; color: var(--gold-300); letter-spacing: 1px; }
.hero__player { display: flex; align-items: center; gap: 14px; flex-wrap: wrap; }
.hero__player b { display: block; font-size: 17px; }
.menu { display: flex; flex-wrap: wrap; gap: 10px; }

.stats { display: grid; grid-template-columns: repeat(auto-fit, minmax(110px, 1fr)); gap: 10px; }
.stat { background: rgba(255, 255, 255, 0.06); border-radius: var(--radius-sm); padding: 10px 12px; }
.stat__value { display: block; font-size: 20px; color: #fff; }
.stat__label { font-size: 12px; color: rgba(238, 244, 251, 0.6); }

.avatar-picker { display: grid; grid-template-columns: repeat(auto-fit, minmax(92px, 1fr)); gap: 10px; margin: 12px 0 16px; }
.avatar-pick { display: flex; flex-direction: column; align-items: center; gap: 6px; padding: 10px 6px; font: inherit; font-size: 12px; color: #eef4fb; background: rgba(255, 255, 255, 0.06); border: 1px solid var(--line); border-radius: var(--radius-sm); cursor: pointer; }
.avatar-pick.is-active { border-color: var(--gold-300); background: rgba(217, 161, 59, 0.18); }
.avatar-groups { display: grid; gap: 16px; margin: 12px 0 16px; }
.avatar-group__title { display: flex; flex-wrap: wrap; align-items: baseline; gap: 8px; margin: 0 0 8px; font-size: 14px; color: var(--gold-300); }
.avatar-group__title .muted { flex-basis: 100%; font-size: 12px; }
.avatar-groups .avatar-picker { margin: 0; }
.avatar-groups .avatar-pick--sm { min-width: 64px; }

.lifeline-intro { display: grid; gap: 12px; }
.lifeline-intro__item { border-left: 3px solid var(--gold-500); padding-left: 12px; }
.lifeline-intro__item p { margin: 4px 0 0; font-size: 13px; line-height: 1.7; }
.ladder-flat { display: flex; flex-wrap: wrap; gap: 6px; }
.ladder-flat__cell { font-size: 12px; padding: 6px 8px; border-radius: 8px; background: rgba(255, 255, 255, 0.08); }
.ladder-flat__cell.is-insurance { background: rgba(46, 139, 116, 0.35); color: #eafaf3; }

/* 答题界面 */
.game__top { display: flex; justify-content: space-between; align-items: center; gap: 12px; }
.game__who { display: flex; align-items: center; gap: 8px; font-size: 14px; }
.game__secured { display: flex; flex-direction: column; align-items: flex-end; font-size: 14px; }
.game__main { display: grid; grid-template-columns: 190px 1fr; gap: 14px; align-items: start; }
.game__bottom { display: flex; justify-content: space-between; align-items: center; gap: 12px; flex-wrap: wrap; }

.ladder { display: flex; flex-direction: column-reverse; gap: 4px; background: rgba(0, 0, 0, 0.22); border: 1px solid var(--line); border-radius: var(--radius); padding: 10px; }
.ladder__row { display: grid; grid-template-columns: 24px 1fr auto; align-items: center; gap: 8px; padding: 6px 8px; border-radius: 8px; font-size: 13px; color: rgba(238, 244, 251, 0.7); }
.ladder__row.is-reached { color: #fff; background: rgba(46, 139, 116, 0.25); }
.ladder__row.is-current { background: linear-gradient(90deg, rgba(217, 161, 59, 0.5), rgba(217, 161, 59, 0.12)); color: #241a06; font-weight: 700; }
.ladder__row.is-insurance { border-left: 3px solid var(--teal-500); }
.ladder__no { opacity: 0.8; }
.ladder__amount { text-align: right; }
.ladder__tag { font-size: 10px; padding: 1px 5px; border-radius: 6px; background: rgba(46, 139, 116, 0.5); color: #eafaf3; }

.stage { display: flex; flex-direction: column; gap: 14px; background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 18px; box-shadow: var(--shadow); }
.timer { display: flex; align-items: center; gap: 10px; }
.timer__track { flex: 1; height: 10px; border-radius: 999px; background: rgba(255, 255, 255, 0.14); overflow: hidden; }
.timer__bar { display: block; height: 100%; width: 100%; background: linear-gradient(90deg, var(--blue-300), var(--teal-500)); transition: width 0.1s linear; }
.timer__bar.is-urgent { background: linear-gradient(90deg, var(--coral-500), var(--gold-500)); }
.timer__text { width: 46px; text-align: right; font-variant-numeric: tabular-nums; color: var(--gold-300); font-weight: 700; }

.stem__meta { display: flex; flex-wrap: wrap; gap: 6px; font-size: 12px; color: rgba(238, 244, 251, 0.75); margin-bottom: 10px; }
.stem__text { margin: 0; font-size: 19px; line-height: 1.6; font-weight: 600; }
.chip { padding: 3px 8px; border-radius: 999px; background: rgba(255, 255, 255, 0.12); }
.chip--tier { background: rgba(63, 143, 196, 0.3); }
.chip--gold { background: rgba(217, 161, 59, 0.28); color: #fdf3dd; }

.options { display: grid; gap: 10px; }
.option { display: flex; align-items: center; gap: 10px; text-align: left; font: inherit; font-size: 15px; color: #eef4fb; padding: 13px 14px; border-radius: var(--radius-sm); border: 1px solid var(--line); background: rgba(255, 255, 255, 0.07); cursor: pointer; }
.option:hover:not(:disabled) { background: rgba(255, 255, 255, 0.16); }
.option__key { display: grid; place-items: center; width: 26px; height: 26px; border-radius: 50%; background: var(--blue-500); color: #fff; font-size: 12px; flex: none; }
.option__text { flex: 1; }
.option.is-removed { opacity: 0.28; text-decoration: line-through; }
.option.is-correct { border-color: var(--teal-500); background: rgba(46, 139, 116, 0.32); }
.option.is-wrong { border-color: var(--coral-500); background: rgba(212, 85, 63, 0.28); }
.options--plain .option { cursor: default; }

.banner { padding: 10px 14px; border-radius: var(--radius-sm); font-weight: 700; text-align: center; }
.banner--up { background: linear-gradient(90deg, rgba(46, 139, 116, 0.5), rgba(46, 139, 116, 0.15)); }
.banner--shield { background: linear-gradient(90deg, rgba(217, 161, 59, 0.55), rgba(217, 161, 59, 0.12)); color: #2a1c04; }

.lifelines { display: flex; gap: 10px; flex-wrap: wrap; }
.lifeline { display: flex; flex-direction: column; gap: 2px; align-items: flex-start; font: inherit; color: #eef4fb; padding: 10px 14px; border-radius: var(--radius-sm); border: 1px solid var(--gold-500); background: rgba(217, 161, 59, 0.14); cursor: pointer; }
.lifeline__name { font-weight: 700; }
.lifeline__state { font-size: 11px; color: rgba(238, 244, 251, 0.65); }
.lifeline.is-used, .lifeline.is-locked { opacity: 0.42; border-color: var(--line); background: rgba(255, 255, 255, 0.05); cursor: not-allowed; }

/* 结算 */
.result-hero .result__headline { text-align: center; }
.result__headline h2 { margin: 0 0 8px; font-size: 22px; }
.result__headline.is-win h2 { color: var(--gold-300); font-size: 26px; }
.result__coins { margin-top: 14px; font-size: 34px; font-weight: 800; color: var(--gold-300); text-shadow: 0 4px 18px rgba(217, 161, 59, 0.35); }
.result__cg { margin-top: 10px; font-size: 13px; color: rgba(238, 244, 251, 0.7); }
.unlock { display: grid; gap: 8px; }
.unlock__item { display: flex; gap: 10px; align-items: baseline; padding: 10px 12px; border-radius: var(--radius-sm); background: rgba(217, 161, 59, 0.16); }
.explain { font-size: 13px; line-height: 1.8; color: rgba(238, 244, 251, 0.85); }
.qa { display: flex; gap: 8px; align-items: center; font-size: 14px; padding: 7px 10px; border-radius: 8px; }
.qa.is-answer { background: rgba(46, 139, 116, 0.26); }
.qa.is-mistake { background: rgba(212, 85, 63, 0.22); }
.qa__key { width: 22px; height: 22px; display: grid; place-items: center; border-radius: 50%; background: var(--blue-500); font-size: 11px; flex: none; }
.qa__text { flex: 1; }
.qa__tag { font-size: 11px; color: var(--gold-300); }
.qa__tag--bad { color: #ff9b8a; }

.codex { display: grid; grid-template-columns: repeat(auto-fill, minmax(120px, 1fr)); gap: 8px; margin-top: 12px; }
.codex__cell { border-radius: var(--radius-sm); border: 1px dashed var(--line); padding: 10px; font-size: 12px; display: flex; flex-direction: column; gap: 4px; color: rgba(238, 244, 251, 0.45); }
.codex__cell.is-lit { border-style: solid; border-color: var(--gold-500); background: rgba(217, 161, 59, 0.12); color: #eef4fb; }
.codex__no { font-weight: 700; }
.codex__times { color: var(--teal-500); }

.achievements { display: grid; gap: 10px; }
.ach { display: flex; gap: 12px; align-items: center; padding: 10px 12px; border-radius: var(--radius-sm); background: rgba(255, 255, 255, 0.06); opacity: 0.65; }
.ach.is-done { opacity: 1; border: 1px solid var(--gold-500); background: rgba(217, 161, 59, 0.14); }
.ach__badge { font-size: 22px; color: var(--gold-300); }
.ach__body b { display: block; }
.ach__body p { margin: 2px 0 0; }
.switch { display: flex; justify-content: space-between; align-items: center; gap: 12px; padding: 8px 0; border-bottom: 1px solid var(--line); font-size: 14px; }

/* 排行榜 */
.btn--gold { background: linear-gradient(180deg, rgba(217, 161, 59, 0.85), rgba(150, 106, 30, 0.85)); border-color: transparent; color: #241a06; font-weight: 700; }
.tabs { display: flex; gap: 8px; flex-wrap: wrap; }
.tabs__note { margin: -6px 0 0; }
.rankline { display: flex; justify-content: space-between; align-items: baseline; gap: 12px; flex-wrap: wrap; margin-bottom: 10px; }
.rankline b { color: var(--gold-300); font-size: 16px; }
.banner--record { margin-bottom: 10px; background: linear-gradient(90deg, rgba(217, 161, 59, 0.6), rgba(217, 161, 59, 0.1)); color: #2a1c04; }
.ranks { display: flex; flex-direction: column; gap: 8px; }
.rank { display: grid; grid-template-columns: 34px 40px 1fr auto auto; align-items: center; gap: 10px; padding: 8px 10px; border-radius: var(--radius-sm); background: rgba(255, 255, 255, 0.06); }
.rank--top { background: linear-gradient(90deg, rgba(217, 161, 59, 0.24), rgba(255, 255, 255, 0.05)); border: 1px solid rgba(217, 161, 59, 0.45); }
.rank__no { text-align: center; font-weight: 700; color: var(--gold-300); font-size: 15px; }
.rank__body { display: flex; flex-direction: column; gap: 2px; min-width: 0; }
.rank__name { font-size: 14px; }
.rank__meta { font-size: 12px; color: rgba(238, 244, 251, 0.62); }
.rank__score { color: var(--gold-300); font-weight: 700; font-variant-numeric: tabular-nums; }
.rank__pure { font-size: 11px; padding: 2px 7px; border-radius: 999px; background: rgba(46, 139, 116, 0.45); color: #eafaf3; }
.catboard { display: flex; flex-direction: column; gap: 8px; }
.catboard__row { display: grid; grid-template-columns: 22px 84px 1fr 56px; align-items: center; gap: 10px; font-size: 13px; }
.catboard__rank { color: var(--gold-300); font-weight: 700; }
.catboard__bar { height: 8px; border-radius: 999px; background: rgba(255, 255, 255, 0.12); overflow: hidden; }
.catboard__bar i { display: block; height: 100%; background: linear-gradient(90deg, var(--teal-500), var(--blue-300)); }
.catboard__value { text-align: right; color: rgba(238, 244, 251, 0.85); }
.privacy { font-size: 12px; color: rgba(238, 244, 251, 0.6); border-left: 3px solid var(--teal-500); padding-left: 10px; line-height: 1.7; }

/* 首屏 */
.page--boot { min-height: 86vh; justify-content: center; position: relative; overflow: hidden; }
.boot { position: static; text-align: center; padding: 40px 0 24px; }
.boot__skyline { position: absolute; left: 0; right: 0; bottom: 30px; opacity: 0.35; pointer-events: none; }
.skyline { width: 100%; height: 160px; display: block; }
.boot__title { font-size: 40px; margin: 0 0 10px; letter-spacing: 4px; color: #fff; text-shadow: 0 6px 24px rgba(217, 161, 59, 0.45); }
.boot__slogan { font-size: 17px; color: var(--gold-300); margin: 0 0 14px; letter-spacing: 1px; }
.boot .btn { margin-top: 22px; }

@media (max-width: 760px) {
  .game__main { grid-template-columns: 1fr; }
  .ladder { flex-direction: row-reverse; overflow-x: auto; padding: 8px; }
  .ladder__row { flex: none; grid-template-columns: auto; gap: 2px; font-size: 11px; padding: 4px 8px; text-align: center; }
  .ladder__tag { display: none; }
  .boot__title { font-size: 30px; letter-spacing: 2px; }
  .stem__text { font-size: 17px; }
  .appbar__spacer { width: 0; }
}