/* =========================================================================
 * 数学学霸模拟器 — 柠檬苏打 · 可爱风主题样式
 * 配色沿用 Lemon Soda 令牌；形态：柔和圆角 + 柔和阴影 + 友好字体 + emoji 图标
 * ========================================================================= */

:root {
  /* —— Palette 变量（对应 Ardot 画布变量）—— */
  --bg:          #FCFAF0;  /* bg          */
  --surface:     #FFFFFF;  /* surface     */
  --border:      #EDE7C8;  /* border      */
  --text:        #33301F;  /* text-primary*/
  --text-2:      #8C8967;  /* text-secondary */
  --text-3:      #B3AD8C;  /* text-tertiary */
  --accent:      #5DC97E;  /* accent      */
  --accent-deep: #3FA861;  /* accent-deep */
  --accent-soft: #EAF8EE;  /* accent-soft */
  --amber:       #FFD23F;  /* amber       */
  --amber-soft:  #FFF6CE;  /* amber-soft  */
  --rose:        #FF7A59;  /* rose        */
  --rose-soft:   #FFE9E0;  /* rose-soft   */
  --inverse:     #FFFFFF;
  --ink:         #33301F;

  --radius-lg: 28px;
  --radius-md: 20px;
  --radius-sm: 14px;
  --shadow-soft:    0 12px 28px rgba(51, 48, 31, 0.12);
  --shadow-soft-sm:0 6px 14px rgba(51, 48, 31, 0.10);
  --font-display: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, -apple-system, sans-serif;
  --phone-w: 375px;
  --phone-h: 812px;
}

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

html, body {
  height: 100%;
  font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Inter", system-ui, sans-serif;
  color: var(--text);
  background: #F3EFE0;
}

.stage {
  min-height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 16px;
}

.phone {
  position: relative;
  width: var(--phone-w);
  height: var(--phone-h);
  background: var(--bg);
  border-radius: 46px;
  overflow: hidden;
  box-shadow: 0 28px 60px rgba(51, 48, 31, 0.22);
  border: 10px solid #FFFFFF;
  display: flex;
  flex-direction: column;
}

.statusbar {
  position: relative; z-index: 1;
  height: 44px;
  flex: 0 0 44px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 22px;
  font-size: 14px;
  font-weight: 600;
  color: var(--text);
}
.sb-right { display: flex; gap: 6px; }
.sb-icon { font-size: 12px; }

.viewport {
  position: relative; z-index: 1;
  flex: 1 1 auto;
  overflow-y: auto;
  overflow-x: hidden;
}
.viewport::-webkit-scrollbar { width: 0; }

.screen {
  display: none;
  flex-direction: column;
  gap: 18px;
  padding: 8px 20px 24px;
  min-height: 100%;
}
.screen.active { display: flex; }

.section-title {
  font-family: var(--font-display);
  font-size: 16px;
  font-weight: 800;
  color: var(--text);
  margin-top: 4px;
}
.section-count {
  font-size: 12px;
  font-weight: 700;
  color: var(--accent-deep);
  background: var(--accent-soft);
  border-radius: 999px;
  padding: 2px 9px;
  margin-left: 6px;
  vertical-align: middle;
}
.sub-title { font-family: var(--font-display); font-size: 20px; font-weight: 800; }
.sub-head {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px;
  padding: 6px 0 2px;
}
.switch-tier {
  border: 1.5px solid var(--border);
  background: var(--surface);
  color: var(--accent-deep);
  font-size: 12px; font-weight: 700;
  padding: 5px 10px;
  border-radius: 999px;
  cursor: pointer;
}
.switch-tier:active { transform: scale(.96); }
.back-btn {
  width: 36px; height: 36px;
  border: none;
  border-radius: 50%;
  background: var(--surface);
  color: var(--text);
  font-size: 22px; line-height: 1;
  box-shadow: var(--shadow-soft-sm);
  cursor: pointer;
  transition: transform .12s ease;
}
.back-btn:active { transform: scale(0.92); }
.head-spacer { width: 36px; }

/* ===================== 首页 ===================== */
.home-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 12px;
  padding-top: 6px;
}
.brand {
  font-family: var(--font-display);
  font-size: 23px; font-weight: 900; letter-spacing: .5px;
}
.greet { font-size: 15px; font-weight: 700; margin-top: 8px; }
.greet-sub { font-size: 12.5px; color: var(--text-2); margin-top: 3px; line-height: 1.45; }

.mascot { width: 80px; height: 80px; flex: 0 0 80px; cursor: pointer; margin-top: 38px; }
.mascot svg { width: 100%; height: 100%; display: block; transform-origin: 50% 82%; animation: mascot-wobble 3.6s ease-in-out infinite; }
@keyframes mascot-wobble {
  0%, 100% { transform: rotate(-3deg) translateY(0); }
  50%      { transform: rotate(3deg) translateY(-3px); }
}
.mascot:active svg { animation: mascot-pop .4s ease; }
@keyframes mascot-pop { 0%{transform:scale(1) rotate(0);} 40%{transform:scale(1.18) rotate(-8deg);} 100%{transform:scale(1) rotate(0);} }

/* 柠檬猫吐槽气泡（搞笑层） */
.mascot-quip {
  align-self: flex-start;
  max-width: 100%;
  background: var(--surface);
  border: 2px solid var(--border);
  border-radius: 16px;
  padding: 10px 14px;
  font-size: 13px; font-weight: 800; color: var(--text);
  box-shadow: var(--shadow-soft-sm);
  transform: rotate(-1.2deg);
  position: relative;
}
.mascot-quip::before { content: "🍋"; margin-right: 6px; }
.mascot-quip.popq { animation: popq .3s ease; }
@keyframes popq { from { transform: rotate(-1.2deg) scale(.9); opacity: .5; } to { transform: rotate(-1.2deg) scale(1); opacity: 1; } }

/* 柔和波浪分隔线 */
.squiggle { width: 100%; height: 14px; }
.squiggle svg { width: 100%; height: 100%; display: block; }

/* 今日任务卡 */
.daily-card {
  background: linear-gradient(150deg, var(--accent) 0%, var(--accent-deep) 100%);
  border-radius: var(--radius-lg);
  padding: 18px 18px 20px;
  color: var(--inverse);
  box-shadow: var(--shadow-soft);
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.streak-pill {
  align-self: flex-start;
  background: rgba(255,255,255,0.22);
  color: var(--inverse);
  font-size: 12px; font-weight: 700;
  padding: 6px 12px;
  border-radius: 999px;
}
.daily-title { font-family: var(--font-display); font-size: 20px; font-weight: 800; }
.daily-desc { font-size: 13px; color: rgba(255,255,255,0.92); line-height: 1.5; }
.progress-row { display: flex; align-items: center; gap: 10px; margin-top: 2px; }
.progress-track {
  flex: 1; height: 10px;
  background: rgba(255,255,255,0.30);
  border-radius: 999px; overflow: hidden;
}
.progress-fill {
  height: 100%; width: 33%;
  background: var(--amber);
  border-radius: 999px;
  transition: width .4s ease;
}
.progress-num { font-size: 13px; font-weight: 800; color: var(--inverse); }
.cta-btn {
  margin-top: 8px;
  border: none;
  background: var(--amber);
  color: var(--ink);
  font-family: var(--font-display);
  font-size: 15px; font-weight: 800;
  padding: 14px;
  border-radius: 16px;
  cursor: pointer;
  box-shadow: var(--shadow-soft-sm);
  transition: transform .12s ease;
}
.cta-btn:active { transform: scale(0.97); }

/* 快捷入口网格 */
.entry-grid { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 12px; }
.entry-card {
  background: var(--surface);
  border-radius: var(--radius-md);
  padding: 16px 10px;
  display: flex; flex-direction: column; align-items: center; gap: 6px;
  cursor: pointer;
  box-shadow: var(--shadow-soft-sm);
  transition: transform .12s ease;
}
.entry-card:active { transform: scale(0.96); }
.entry-ico { width: 30px; height: 30px; font-size: 26px; line-height: 1; }
.entry-label { font-size: 13px; font-weight: 800; }
.entry-desc { font-size: 11px; color: var(--text-2); }

/* ===================== 答题 ===================== */
.timer {
  font-family: var(--font-display);
  font-size: 14px; font-weight: 800; color: var(--accent-deep);
  background: var(--accent-soft);
  padding: 6px 12px; border-radius: 999px;
  transition: background .15s ease, color .15s ease, transform .15s ease;
}
.timer.danger {
  background: var(--rose); color: var(--inverse);
  animation: timer-pulse .5s ease-in-out infinite;
}
@keyframes timer-pulse { 0%,100%{ transform: scale(1); } 50%{ transform: scale(1.12); } }
.quiz-wrap { display: flex; flex-direction: column; gap: 16px; padding-top: 6px; }
.quiz-wrap.shake { animation: shake .5s; }

/* ---- 答题后秘籍解析（爬塔与秘籍打通） ---- */
.quiz-sol {
  margin-top: 4px;
  background: linear-gradient(180deg, #FFFDF2, #FFFBEC);
  border: 2px solid #F4E2A0;
  border-radius: 16px;
  padding: 14px 16px;
  display: flex; flex-direction: column; gap: 10px;
  animation: sol-in .35s ease;
}
.quiz-sol.wrong { background: linear-gradient(180deg, #FFF3F1, #FFEDEA); border-color: #F3C4BA; }
.quiz-sol .q-idea { margin: 0; }
.quiz-sol .q-toggle {
  align-self: flex-start; margin: 0;
  background: rgba(255,255,255,.7); border: 1.5px solid #E9D27E;
  color: #7A5C00;
}
.quiz-sol .q-sol-steps { margin-top: 2px; }
.quiz-sol .q-steps li { color: #5b4a15; }
@keyframes sol-in { from { opacity: 0; transform: translateY(8px); } to { opacity: 1; transform: none; } }

/* ---- 挡位选择 ---- */
.tier-select { display: flex; flex-direction: column; gap: 12px; padding-top: 8px; }
.tier-card {
  display: flex; flex-direction: column; gap: 6px;
  align-items: flex-start; text-align: left;
  background: var(--surface);
  border: 2px solid var(--border);
  border-radius: 18px;
  padding: 14px 16px;
  cursor: pointer;
  transition: transform .12s, box-shadow .12s, border-color .12s;
  box-shadow: var(--shadow-soft-sm);
}
.tier-card:active { transform: scale(.98); }
.tier-card:hover { border-color: var(--accent); }
.tier-row { display: flex; align-items: center; justify-content: space-between; width: 100%; }
.tier-name { font-family: var(--font-display); font-weight: 800; font-size: 18px; color: var(--text); }
.tier-dots { color: var(--accent-deep); letter-spacing: 2px; font-size: 13px; }
.tier-desc { font-size: 12px; color: var(--text-3); }
@keyframes shake {
  10%, 90% { transform: translateX(-2px); }
  20%, 80% { transform: translateX(3px); }
  30%, 50%, 70% { transform: translateX(-6px); }
  40%, 60% { transform: translateX(6px); }
}
.quiz-subject {
  align-self: flex-start;
  font-family: var(--font-display);
  font-size: 12px; font-weight: 800; color: var(--accent-deep);
  background: var(--accent-soft); padding: 5px 12px; border-radius: 999px;
}
.quiz-stem {
  font-size: 20px; font-weight: 800; line-height: 1.45;
  background: var(--surface);
  border-radius: var(--radius-md);
  padding: 20px 18px;
  box-shadow: var(--shadow-soft-sm);
}
.opt-list { display: flex; flex-direction: column; gap: 12px; }
.opt {
  display: flex; align-items: center; gap: 12px;
  background: var(--surface);
  border-radius: var(--radius-md);
  padding: 16px 14px;
  font-size: 16px; font-weight: 700;
  cursor: pointer;
  box-shadow: var(--shadow-soft-sm);
  transition: transform .12s ease, background .15s ease;
}
.opt:active { transform: scale(0.98); }
.opt-key {
  width: 28px; height: 28px; flex: 0 0 28px;
  border-radius: 9px;
  background: var(--accent-soft);
  color: var(--accent-deep);
  display: flex; align-items: center; justify-content: center;
  font-family: var(--font-display);
  font-weight: 800; font-size: 14px;
}
.opt.correct { background: var(--accent-soft); }
.opt.correct .opt-key { background: var(--accent); color: var(--inverse); }
.opt.wrong { background: var(--rose-soft); }
.opt.wrong .opt-key { background: var(--rose); color: var(--inverse); }

/* 填空输入 */
.fill-input {
  width: 100%;
  font-size: 22px; font-weight: 800; text-align: center;
  padding: 18px;
  border: 2px solid var(--border);
  border-radius: var(--radius-md);
  background: var(--surface);
  color: var(--text);
  outline: none;
  box-shadow: var(--shadow-soft-sm);
}
.fill-input:focus { border-color: var(--accent-deep); }
.fill-submit {
  border: none;
  background: var(--accent);
  color: var(--ink);
  font-family: var(--font-display);
  font-size: 16px; font-weight: 800;
  padding: 15px; border-radius: 16px;
  cursor: pointer;
  box-shadow: var(--shadow-soft-sm);
  transition: transform .12s ease;
}
.fill-submit:active { transform: scale(0.97); }

/* ===================== 报告 ===================== */
.report-hero { display: flex; justify-content: center; padding: 8px 0; }
.report-ring {
  width: 168px; height: 168px; border-radius: 50%;
  background: conic-gradient(var(--accent) calc(var(--p, 86) * 1%), var(--accent-soft) 0);
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  position: relative;
  box-shadow: var(--shadow-soft);
}
.report-ring::before {
  content: ""; position: absolute; inset: 16px;
  background: var(--surface); border-radius: 50%;
}
.ring-num { position: relative; font-family: var(--font-display); font-size: 34px; font-weight: 900; color: var(--accent-deep); }
.ring-label { position: relative; font-size: 12px; color: var(--text-2); margin-top: 2px; }

.chip-row { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.chip {
  border-radius: var(--radius-md);
  padding: 16px;
  display: flex; flex-direction: column; gap: 4px;
  box-shadow: var(--shadow-soft-sm);
}
.chip.gold { background: var(--amber-soft); }
.chip.rose { background: var(--rose-soft); }
.chip-label { font-size: 12px; color: var(--text-2); font-weight: 700; }
.chip-value { font-family: var(--font-display); font-size: 24px; font-weight: 900; }
.chip.gold .chip-value { color: #C98A00; }
.chip.rose .chip-value { color: var(--rose); }

.recent-list { display: flex; flex-direction: column; gap: 10px; }
.recent-item {
  display: flex; align-items: center; justify-content: space-between;
  background: var(--surface);
  border-radius: var(--radius-sm);
  padding: 14px 16px;
  box-shadow: var(--shadow-soft-sm);
}
.recent-subj { font-size: 14px; font-weight: 800; }
.recent-meta { display: flex; align-items: center; gap: 10px; }
.recent-time { font-size: 12px; color: var(--text-2); }
.recent-result {
  font-size: 12px; font-weight: 800;
  padding: 3px 10px; border-radius: 999px;
}
.recent-result.ok { background: var(--accent-soft); color: var(--accent-deep); }
.recent-result.no { background: var(--rose-soft); color: var(--rose); }

/* ===================== 秘籍（数学模型 · 自带题库） ===================== */
/* 已习得进度 */
.manual-progress {
  background: var(--surface);
  border: 2px solid var(--border);
  border-radius: var(--radius-md);
  padding: 12px 14px;
  display: flex; flex-direction: column; gap: 8px;
  box-shadow: var(--shadow-soft-sm);
}
.mp-head { display: flex; align-items: baseline; justify-content: space-between; }
.mp-label { font-size: 13px; font-weight: 800; }
.mp-num { font-size: 13px; font-weight: 800; color: var(--text-2); }
.mp-num b { color: var(--accent-deep); font-size: 17px; font-family: var(--font-display); }
.mp-track {
  height: 9px; width: 100%;
  background: var(--accent-soft);
  border-radius: 999px; overflow: hidden;
}
.mp-fill {
  height: 100%; width: 0%;
  background: linear-gradient(90deg, var(--accent), var(--accent-deep));
  border-radius: 999px;
  transition: width .45s cubic-bezier(.2,.8,.2,1);
}

/* 今日必修卡 */
.feature-card {
  background: linear-gradient(150deg, var(--accent) 0%, var(--accent-deep) 100%);
  border-radius: var(--radius-lg);
  padding: 18px;
  color: var(--inverse);
  box-shadow: var(--shadow-soft);
  display: flex; flex-direction: column; gap: 12px;
  cursor: pointer;
  transition: transform .12s ease;
}
.feature-card:active { transform: scale(0.98); }
.feature-tag {
  align-self: flex-start;
  background: var(--amber); color: var(--ink);
  font-family: var(--font-display);
  font-size: 12px; font-weight: 800;
  padding: 5px 12px; border-radius: 999px;
}
.feature-row { display: flex; align-items: center; gap: 12px; }
.feature-ico { font-size: 32px; line-height: 1; }
.feature-meta { flex: 1; min-width: 0; display: flex; flex-direction: column; gap: 4px; }
.feature-name { font-family: var(--font-display); font-size: 19px; font-weight: 800; }
.feature-tip { font-size: 12.5px; color: rgba(255,255,255,0.92); line-height: 1.45; }
.feature-go { align-self: flex-end; font-size: 12px; font-weight: 800; color: var(--amber); }

/* 秘籍列表 */
.manual-list { display: flex; flex-direction: column; gap: 12px; }
.manual-card {
  background: var(--surface);
  border: 2px solid transparent;
  border-radius: var(--radius-md);
  padding: 14px 16px;
  display: flex; flex-direction: column; gap: 6px;
  box-shadow: var(--shadow-soft-sm);
  cursor: pointer;
  transition: transform .12s ease, border-color .12s ease;
}
.manual-card:active { transform: scale(0.98); }
.manual-card.learnt { border-color: var(--accent); background: var(--accent-soft); }
.manual-top { display: flex; align-items: center; gap: 10px; }
.manual-ico {
  width: 38px; height: 38px; flex: 0 0 38px;
  border-radius: 12px;
  background: var(--amber-soft);
  color: var(--accent-deep);
  display: flex; align-items: center; justify-content: center;
  font-size: 20px; line-height: 1;
}
.manual-name { font-size: 15px; font-weight: 800; flex: 1; min-width: 0; }
.manual-badge {
  font-size: 11px; font-weight: 800;
  padding: 3px 9px; border-radius: 999px;
  background: var(--border); color: var(--text-3);
}
.manual-card.learnt .manual-badge { background: var(--surface); color: var(--accent-deep); }
.manual-tip { font-size: 12px; color: var(--text-2); line-height: 1.45; }
.manual-count { font-size: 11px; color: var(--text-3); font-weight: 700; }

/* 模型下的「子招式」卡片：左侧高亮表示它是可下钻的招式 */
.method-card { border-left: 3px solid var(--accent); }
.method-card .manual-ico { width: 30px; height: 30px; flex-basis: 30px; font-size: 16px; }

/* 秘籍详情弹窗 */
.manual-card-lg { max-height: 82%; overflow-y: auto; text-align: left; padding: 26px 20px 20px; }
.manual-card-lg::-webkit-scrollbar { width: 0; }
.manual-close {
  position: absolute; top: 12px; right: 14px;
  border: none; background: transparent;
  font-size: 22px; line-height: 1; color: var(--text-2);
  cursor: pointer; z-index: 2;
}
.mh-ico { font-size: 40px; display: block; text-align: center; margin: 2px 0 4px; }
.manual-heart {
  font-size: 13px; color: var(--text-2); line-height: 1.55;
  background: var(--bg);
  border-radius: 14px; padding: 12px 14px; margin-top: 6px;
}

/* 题库 + 解析 */
.q-list { display: flex; flex-direction: column; gap: 14px; margin-top: 14px; }
.q-card {
  background: var(--bg);
  border: 1.5px solid var(--border);
  border-radius: 16px; padding: 14px;
  display: flex; flex-direction: column; gap: 10px;
}
.q-subj {
  align-self: flex-start;
  font-family: var(--font-display);
  font-size: 11px; font-weight: 800; color: var(--accent-deep);
  background: var(--accent-soft); padding: 4px 10px; border-radius: 999px;
}
.q-stem { font-size: 15px; font-weight: 800; line-height: 1.5; }
.q-opts { display: flex; flex-direction: column; gap: 8px; }
.q-opt {
  display: flex; align-items: center; gap: 10px;
  background: var(--surface);
  border-radius: 12px; padding: 11px 12px;
  font-size: 14px; font-weight: 700;
  cursor: pointer; box-shadow: var(--shadow-soft-sm);
  transition: transform .12s ease, background .15s ease;
}
.q-opt:active { transform: scale(0.98); }
.q-key {
  width: 26px; height: 26px; flex: 0 0 26px;
  border-radius: 8px;
  background: var(--accent-soft); color: var(--accent-deep);
  display: flex; align-items: center; justify-content: center;
  font-family: var(--font-display); font-weight: 800; font-size: 13px;
}
.q-opt.correct { background: var(--accent-soft); }
.q-opt.correct .q-key { background: var(--accent); color: var(--inverse); }
.q-opt.wrong { background: var(--rose-soft); }
.q-opt.wrong .q-key { background: var(--rose); color: var(--inverse); }
.q-fill { font-size: 12px; color: var(--text-3); }
.q-toggle {
  align-self: flex-start;
  border: 1.5px solid var(--border); background: var(--surface);
  color: var(--accent-deep);
  font-size: 13px; font-weight: 800;
  padding: 8px 14px; border-radius: 999px; cursor: pointer;
  transition: transform .12s ease;
}
.q-toggle:active { transform: scale(0.96); }
.q-sol { display: flex; flex-direction: column; gap: 8px; background: var(--amber-soft); border-radius: 14px; padding: 12px 14px; }
.q-idea { font-size: 13px; font-weight: 700; line-height: 1.55; color: #8A6A00; }
.q-steps-label { font-size: 12px; font-weight: 800; color: var(--text-2); }
.q-steps { margin: 0; padding-left: 20px; display: flex; flex-direction: column; gap: 4px; }
.q-steps li { font-size: 13px; line-height: 1.5; color: var(--text); }

/* 难度筛选条 + 徽标（学霸模拟器：简单=理解概念 / 进阶=难点） */
.q-filter { display: flex; gap: 8px; margin-top: 4px; flex-wrap: wrap; }
.q-filter button {
  flex: 1 1 0; min-width: 84px;
  border: 1.5px solid var(--border); background: var(--surface);
  color: var(--text-2); font-family: var(--font-display);
  font-size: 12.5px; font-weight: 800;
  padding: 9px 6px; border-radius: 999px; cursor: pointer;
  transition: transform .12s ease, background .15s ease, color .15s ease, border-color .15s ease;
}
.q-filter button:active { transform: scale(0.97); }
.q-filter button.active {
  background: var(--accent); color: var(--inverse); border-color: var(--accent);
  box-shadow: var(--shadow-soft-sm);
}
.q-card-head { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }
.q-level {
  font-family: var(--font-display);
  font-size: 11px; font-weight: 900;
  padding: 3px 9px; border-radius: 999px;
}
.q-easy { background: #E6F6EC; color: #1E8A4C; }
.q-hard { background: #FDEAEC; color: #C23A48; }
.q-empty { font-size: 13px; color: var(--text-3); text-align: center; padding: 18px 0; }
/* 卡片按难度做左侧色条，一眼分挡 */
.q-card.lvl-easy { border-left: 4px solid #5BC98A; }
.q-card.lvl-hard { border-left: 4px solid #E57380; }

/* 招式详情里的「返回上一层」按钮 */
.q-back {
  align-self: flex-start;
  border: 1.5px solid var(--accent); background: var(--accent-soft);
  color: var(--accent-deep);
  font-size: 12px; font-weight: 800;
  padding: 6px 12px; border-radius: 999px; cursor: pointer;
  margin-bottom: 4px;
  transition: transform .12s ease;
}
.q-back:active { transform: scale(0.96); }

/* ===================== 底部胶囊导航 ===================== */
.tabbar {
  position: relative; z-index: 1;
  flex: 0 0 auto;
  display: flex; justify-content: center;
  padding: 10px 16px calc(10px + env(safe-area-inset-bottom, 0px));
  background: var(--bg);
  border-top: 1px solid var(--border);
}
.tabbar-pill {
  display: flex; gap: 4px;
  background: var(--surface);
  border-radius: 36px;
  padding: 6px;
  width: 100%;
  justify-content: space-around;
  box-shadow: var(--shadow-soft-sm);
}
.tab {
  flex: 1;
  border: none; background: transparent;
  border-radius: 26px;
  padding: 8px 4px;
  display: flex; flex-direction: column; align-items: center; gap: 3px;
  cursor: pointer;
  color: var(--text-3);
  transition: background .15s ease, color .15s ease;
}
.tab-ico { width: 24px; height: 24px; font-size: 22px; line-height: 1; }
.tab-tx { font-size: 10px; font-weight: 700; }
.tab.active {
  background: var(--accent-soft);
  color: var(--accent-deep);
}

/* ===================== 段位徽章（首页） ===================== */
.rank-badge {
  display: flex; align-items: center; gap: 12px;
  background: var(--surface);
  border: 2px solid var(--border);
  border-radius: var(--radius-md);
  padding: 12px 14px;
  cursor: pointer;
  box-shadow: var(--shadow-soft-sm);
  transition: transform .12s ease, border-color .12s ease;
}
.rank-badge:active { transform: scale(0.98); }
.rank-badge:hover { border-color: var(--accent); }
.rb-ico { width: 38px; height: 38px; flex: 0 0 38px; font-size: 26px; line-height: 1; display: flex; align-items: center; justify-content: center; background: var(--accent-soft); border-radius: 12px; }
.rb-text { display: flex; flex-direction: column; gap: 2px; flex: 1; min-width: 0; }
.rb-rank { font-size: 15px; font-weight: 800; }
.rb-elo { font-size: 12px; color: var(--text-2); font-weight: 700; }
.rb-go { font-size: 12px; font-weight: 800; color: var(--accent-deep); flex: 0 0 auto; }

/* ===================== 答题页：ELO 芯片 + 段位 HUD ===================== */
.elo-chip {
  font-family: var(--font-display);
  font-size: 14px; font-weight: 800; color: var(--ink);
  background: var(--amber);
  padding: 6px 11px; border-radius: 999px;
  flex: 0 0 auto;
}
/* 连击 chip（学霸秒题爽感） */
.combo-chip {
  font-family: var(--font-display);
  font-size: 13px; font-weight: 800; color: #fff;
  background: linear-gradient(135deg, #FF7A59, #FF3D6E);
  padding: 5px 11px; border-radius: 999px;
  flex: 0 0 auto;
  box-shadow: 0 3px 10px rgba(255,61,110,.45);
  animation: comboPulse 1.1s ease-in-out infinite;
}
.combo-chip.pop { animation: comboPop .35s ease-out, comboPulse 1.1s ease-in-out infinite .35s; }
@keyframes comboPop { 0% { transform: scale(.6); } 60% { transform: scale(1.25); } 100% { transform: scale(1); } }
@keyframes comboPulse { 0%, 100% { transform: scale(1); } 50% { transform: scale(1.06); } }
.rank-hud {
  background: var(--surface);
  border: 2px solid var(--border);
  border-radius: var(--radius-md);
  padding: 12px 14px;
  display: flex; flex-direction: column; gap: 8px;
  box-shadow: var(--shadow-soft-sm);
}
.rank-hud-top { display: flex; align-items: center; justify-content: space-between; gap: 8px; }
.rank-name { font-family: var(--font-display); font-size: 15px; font-weight: 800; color: var(--text); }
.rank-opp { font-size: 11px; font-weight: 700; color: var(--text-3); flex: 0 0 auto; }
.rank-track {
  height: 10px; width: 100%;
  background: var(--accent-soft);
  border-radius: 999px; overflow: hidden;
}
.rank-fill {
  height: 100%; width: 0%;
  background: linear-gradient(90deg, var(--accent), var(--accent-deep));
  border-radius: 999px;
  transition: width .45s cubic-bezier(.2,.8,.2,1);
}
.rank-next { font-size: 12px; color: var(--text-2); font-weight: 700; }

/* ===================== 趣味瞬间：ELO 增减行 ===================== */
.moment-elo {
  margin-top: 6px;
  font-family: var(--font-display);
  font-size: 14px; font-weight: 800; color: var(--accent-deep);
  background: var(--accent-soft);
  padding: 8px 12px; border-radius: 12px;
}
.interesting-elo { color: var(--rose); background: var(--rose-soft); }

/* ===================== 段位榜弹窗 ===================== */
.rank-card { max-height: 78%; overflow-y: auto; }
.rank-card::-webkit-scrollbar { width: 0; }
.rank-modal-note {
  font-size: 12.5px; color: var(--text-2); line-height: 1.5;
  margin: 8px 0 14px;
}
.rank-ladder { display: flex; flex-direction: column; gap: 8px; }
.ladder-row {
  display: flex; align-items: center; gap: 10px;
  background: var(--bg);
  border: 1.5px solid var(--border);
  border-radius: 14px;
  padding: 10px 12px;
}
.ladder-row.cur {
  border-color: var(--accent-deep);
  background: var(--accent-soft);
  box-shadow: 0 0 0 2px rgba(63,168,97,0.18);
}
.ladder-ico { width: 34px; height: 34px; flex: 0 0 34px; font-size: 22px; line-height: 1; display: flex; align-items: center; justify-content: center; }
.ladder-body { display: flex; flex-direction: column; gap: 2px; flex: 1; min-width: 0; }
.ladder-name { font-size: 13.5px; font-weight: 800; }
.ladder-flavor { font-size: 11px; color: var(--text-2); line-height: 1.4; }
.ladder-range { font-size: 11px; font-weight: 800; color: var(--text-3); flex: 0 0 auto; }
.rank-close { background: var(--surface); color: var(--text); border: 1.5px solid var(--border); margin-top: 10px; }

/* ===================== 段位塔（设计稿落地） ===================== */
.rt-hero {
  display: flex; flex-direction: column; gap: 10px;
  background: linear-gradient(135deg, var(--accent), var(--accent-deep));
  border-radius: var(--radius-md);
  padding: 16px 18px;
  box-shadow: 0 10px 24px rgba(63,168,97,.28);
}
.rt-pill {
  align-self: flex-start;
  font-size: 12px; font-weight: 700; color: #fff;
  background: rgba(255,255,255,.16);
  padding: 4px 10px; border-radius: 999px;
}
.rt-hero-title { font-size: 17px; font-weight: 800; color: #fff; line-height: 1.35; }
.rt-hero-sub { font-size: 12px; color: rgba(255,255,255,.85); line-height: 1.5; }
.rt-score {
  display: flex; align-items: center; gap: 12px;
  background: rgba(255,255,255,.16);
  border-radius: 14px; padding: 10px 12px;
}
.rt-score-left { display: flex; flex-direction: column; gap: 1px; flex: 0 0 auto; }
.rt-score-label { font-size: 12px; font-weight: 700; color: rgba(255,255,255,.9); }
.rt-score-num { font-size: 26px; font-weight: 800; color: #fff; line-height: 1; font-family: var(--font-display); }
.rt-score-right { display: flex; flex-direction: column; gap: 5px; flex: 1; min-width: 0; }
.rt-score-track { height: 6px; width: 100%; background: rgba(255,255,255,.3); border-radius: 999px; overflow: hidden; }
.rt-score-fill { height: 100%; width: 0%; background: #fff; border-radius: 999px; transition: width .45s cubic-bezier(.2,.8,.2,1); }
.rt-score-hint { font-size: 11px; color: rgba(255,255,255,.82); }
.rt-cta {
  margin-top: 2px;
  font-family: var(--font-display);
  font-size: 15px; font-weight: 800; color: var(--accent-deep);
  background: #fff; border: none; border-radius: 14px;
  height: 46px; cursor: pointer;
  box-shadow: 0 6px 14px rgba(0,0,0,.12);
  transition: transform .12s ease;
}
.rt-cta:active { transform: scale(.98); }
.rt-learned {
  font-size: 12px; font-weight: 700; color: #fff;
  background: rgba(255,255,255,.14);
  border-radius: 10px; padding: 7px 10px; line-height: 1.4;
}

/* BOSS 战高亮（顶部段位的进阶题） */
.quiz-wrap.boss {
  border: 2px solid var(--rose);
  box-shadow: 0 0 0 4px rgba(242,121,91,.16);
  border-radius: 16px; padding: 6px;
}
.quiz-wrap.boss .quiz-subject { color: var(--rose); font-weight: 800; }

.rt-tower { margin-top: 14px; }
.rt-tower-head { display: flex; align-items: baseline; justify-content: space-between; gap: 8px; margin-bottom: 10px; }
.rt-tower-title { font-size: 16px; font-weight: 800; color: var(--text); }
.rt-tower-count { font-size: 12px; color: var(--text-2); font-weight: 700; }

/* 九段卡片 tier 配色（覆盖上方默认 ladder 样式） */
.ladder-row { --c: var(--accent-deep); --cs: var(--accent-soft); --cb: var(--accent); }
.ladder-row.tier-amber { --c: #B8860B; --cs: var(--amber-soft); --cb: #E0A21E; }
.ladder-row.tier-rose  { --c: var(--rose); --cs: var(--rose-soft);  --cb: var(--rose); }
.ladder-row {
  display: flex; align-items: center; gap: 10px;
  background: var(--bg);
  border: 1.5px solid var(--cb);
  border-radius: 14px; padding: 10px 12px;
}
.ladder-row.cur {
  background: linear-gradient(135deg, var(--accent), var(--accent-deep));
  border-color: transparent;
  box-shadow: 0 0 0 2px rgba(63,168,97,.18), 0 0 22px 2px rgba(63,168,97,.45);
}
.ladder-ico {
  width: 36px; height: 36px; flex: 0 0 36px;
  font-size: 22px; line-height: 1;
  display: flex; align-items: center; justify-content: center;
  background: var(--cs); border-radius: 50%;
  border: 2px solid var(--cb);
}
.ladder-row.cur .ladder-ico { background: rgba(255,255,255,.22); border-color: #fff; }
.ladder-body { display: flex; flex-direction: column; gap: 2px; flex: 1; min-width: 0; }
.ladder-name { font-size: 13.5px; font-weight: 800; color: var(--text); }
.ladder-row.cur .ladder-name { color: #fff; }
.ladder-flavor { font-size: 11px; color: var(--text-2); line-height: 1.4; }
.ladder-row.cur .ladder-flavor { color: rgba(255,255,255,.85); }
.ladder-status { font-size: 11px; font-weight: 800; color: var(--text-3); flex: 0 0 auto; text-align: right; }
.ladder-row.cur .ladder-status { color: #fff; }

/* ===================== 趣味瞬间弹层 ===================== */
.moment {
  position: absolute; inset: 0;
  background: rgba(51, 48, 31, 0.45);
  display: flex; align-items: center; justify-content: center;
  z-index: 30;
  padding: 0 28px;
  animation: fade .2s ease;
}
.moment[hidden] { display: none; }
/* 快答「秒了」时整屏金光闪一下 */
.moment.flash { background: rgba(255, 210, 63, 0.32); animation: miaoFlash .55s ease-out; }
.moment.flash .moment-card { box-shadow: 0 0 0 3px var(--amber), 0 18px 44px rgba(255,210,63,.5); }
@keyframes miaoFlash { 0% { background: rgba(255,210,63,.5); } 100% { background: rgba(255,210,63,.32); } }
@keyframes fade { from { opacity: 0; } to { opacity: 1; } }
.moment-card {
  background: var(--surface);
  border-radius: var(--radius-lg);
  padding: 28px 24px 24px;
  text-align: center;
  width: 100%;
  max-height: 92%;
  overflow-y: auto;
  box-shadow: var(--shadow-soft);
  animation: pop .28s cubic-bezier(.2,1.4,.4,1);
}
@keyframes pop { from { transform: scale(.8); opacity: 0; } to { transform: scale(1); opacity: 1; } }
.moment-ico { width: 76px; height: 76px; margin: 0 auto 10px; overflow: hidden; border-radius: 16px; }
.moment-ico svg { width: 100%; height: 100%; }
.moment-meme { width: 100%; height: 100%; object-fit: cover; border-radius: 16px; display: block; }
.moment-title { font-family: var(--font-display); font-size: 30px; font-weight: 900; color: var(--accent-deep); }
.moment-sub { font-size: 14px; color: var(--text-2); margin-top: 8px; line-height: 1.5; }
.moment-joke { color: var(--rose); font-weight: 700; }
.moment-btn {
  margin-top: 18px; width: 100%;
  border: none; border-radius: 16px;
  background: var(--accent); color: var(--ink);
  font-family: var(--font-display);
  font-size: 16px; font-weight: 800; padding: 14px;
  cursor: pointer;
  box-shadow: var(--shadow-soft-sm);
  transition: transform .12s ease;
}
.moment-btn:active { transform: scale(0.97); }
.interesting-title { color: var(--rose); }
.interesting-btn { background: var(--rose); color: var(--inverse); }

/* 答错反馈弹层里的解析框 */
.moment-sol {
  margin-top: 14px;
  background: var(--rose-soft);
  border: 1px solid #F3C4BA;
  border-radius: 14px;
  padding: 12px 14px;
  text-align: left;
}
.moment-sol[hidden] { display: none; }
.moment-sol-head { font-size: 13px; font-weight: 800; color: var(--rose); margin-bottom: 6px; }
.moment-sol-idea { margin: 0; font-size: 13px; font-weight: 700; line-height: 1.55; color: #8A2A1E; }
.moment-sol-idea[hidden] { display: none; }
.moment-sol-toggle {
  margin-top: 8px; border: none; background: transparent;
  color: var(--rose); font-weight: 800; font-size: 13px; cursor: pointer; padding: 0;
}
.moment-sol-steps { margin: 6px 0 0; padding-left: 20px; display: flex; flex-direction: column; gap: 4px; }
.moment-sol-steps[hidden] { display: none; }
.moment-sol-steps li { font-size: 13px; line-height: 1.5; color: var(--text); }

/* 小屏（手机姿态）自适应缩放：仅在窄屏时把手机壳等比缩小，避免与桌面布局冲突 */
@media (max-width: 767px) and (max-height: 860px) {
  .stage { padding: 0; }
  .phone { transform: scale(calc((100vh - 24px) / 812)); transform-origin: center; border-radius: 0; border-width: 0; box-shadow: none; }
}

/* ===================== 搞笑动效层 ===================== */
.confetti-layer { position: absolute; inset: 0; overflow: hidden; pointer-events: none; z-index: 28; }
.confetti {
  position: absolute; top: 40%;
  line-height: 1;
  animation: confetti-fall linear forwards;
  will-change: transform, opacity;
}
@keyframes confetti-fall {
  from { opacity: 1; transform: translateY(0) rotate(0); }
  to   { opacity: 0; transform: translateY(250px) translateX(var(--dx, 0)) rotate(240deg); }
}

.toast {
  position: absolute;
  left: 50%; bottom: 84px;
  transform: translateX(-50%) translateY(8px);
  background: var(--ink); color: #fff;
  font-size: 13px; font-weight: 700;
  padding: 10px 16px; border-radius: 999px;
  box-shadow: var(--shadow-soft);
  z-index: 26;
  max-width: 80%; text-align: center;
  opacity: 0; transition: opacity .25s ease, transform .25s ease;
  pointer-events: none;
}
.toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }

/* =========================================================================
 * 登录 + 段位排行（真实后端）
 * ========================================================================= */
/* 首页登录头像 */
.home-head { position: relative; }
.login-chip {
  position: absolute; top: 2px; right: 0;
  display: flex; align-items: center; gap: 6px;
  background: #fff; border: 1.5px solid var(--accent-soft);
  border-radius: 999px; padding: 5px 12px 5px 8px;
  cursor: pointer; box-shadow: var(--shadow-soft-sm);
  transition: transform .15s ease, border-color .15s ease;
  z-index: 3;
}
.login-chip:active { transform: scale(.96); }
.login-chip.on { border-color: var(--accent); }
.lc-ava { font-size: 20px; line-height: 1; }
.lc-tx { font-size: 12px; font-weight: 800; color: var(--accent-deep); }

/* 登录 / 地区 弹窗 */
.login-card { text-align: center; }
.login-ava { font-size: 46px; margin-bottom: 6px; }
.login-tip { font-size: 13px; color: var(--ink); opacity: .72; margin: 4px 0 14px; line-height: 1.5; }
.login-field { display: flex; align-items: center; gap: 8px; background: var(--bg); border: 1.5px solid var(--accent-soft);
  border-radius: 14px; padding: 8px 12px; margin-bottom: 14px; }
.lf-label { font-size: 13px; font-weight: 800; color: var(--accent-deep); }
.lf-input { flex: 1; border: none; background: transparent; font-size: 15px; font-weight: 700; color: var(--ink); outline: none; }
.login-btn { width: 100%; border: none; border-radius: 14px; padding: 14px; font-size: 15px; font-weight: 800;
  cursor: pointer; margin-bottom: 10px; transition: transform .12s ease, box-shadow .12s ease; }
.login-btn:active { transform: scale(.98); }
.login-wx { background: linear-gradient(135deg, #4CAF50, #2E9B43); color: #fff; box-shadow: 0 8px 18px rgba(46,155,67,.32); }
.login-phone { background: var(--amber); color: var(--ink); box-shadow: 0 8px 18px rgba(255,210,63,.32); }
.login-dev { font-size: 12px; color: var(--rose); font-weight: 700; min-height: 14px; margin-top: 4px; }

/* 地区选择网格 */
.region-card { max-height: 76vh; overflow: hidden; display: flex; flex-direction: column; }
.region-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px; overflow-y: auto; padding: 4px 2px 8px; margin-top: 8px; }
.region-cell { border: 1.5px solid var(--accent-soft); background: #fff; border-radius: 12px; padding: 11px 4px;
  font-size: 13px; font-weight: 800; color: var(--accent-deep); cursor: pointer; transition: all .12s ease; }
.region-cell:active { transform: scale(.95); }
.region-cell.cur { background: var(--accent); color: #fff; border-color: var(--accent); }

/* 排行页 */
#screen-rank .rank-me { display: flex; align-items: center; gap: 12px; background: linear-gradient(150deg, var(--accent) 0%, var(--accent-deep) 100%);
  border-radius: 18px; padding: 14px; color: #fff; box-shadow: var(--shadow-soft); margin-bottom: 14px; }
.rm-ava { font-size: 34px; width: 50px; height: 50px; display: grid; place-items: center; background: rgba(255,255,255,.22); border-radius: 14px; }
.rm-body { flex: 1; display: flex; flex-direction: column; gap: 3px; min-width: 0; }
.rm-name { font-size: 16px; font-weight: 900; }
.rm-sub { font-size: 12px; opacity: .9; line-height: 1.4; }
.rm-login { border: none; background: #fff; color: var(--accent-deep); font-weight: 800; font-size: 13px;
  border-radius: 999px; padding: 8px 14px; cursor: pointer; }
.rm-logout { border: 1.5px solid rgba(255,255,255,.7); background: rgba(255,255,255,.16); color: #fff; font-weight: 800; font-size: 13px;
  border-radius: 999px; padding: 8px 14px; cursor: pointer; }

.rank-scope { display: flex; gap: 8px; background: var(--accent-soft); border-radius: 14px; padding: 5px; margin-bottom: 12px; }
.rs-tab { flex: 1; border: none; background: transparent; border-radius: 10px; padding: 10px; font-size: 14px; font-weight: 800;
  color: var(--accent-deep); cursor: pointer; transition: all .15s ease; }
.rs-tab.active { background: #fff; box-shadow: var(--shadow-soft-sm); }

.rank-region-bar { display: flex; align-items: center; justify-content: space-between; background: #fff; border: 1.5px solid var(--accent-soft);
  border-radius: 12px; padding: 10px 14px; margin-bottom: 12px; }
.rrb-label { font-size: 13px; font-weight: 800; color: var(--accent-deep); }
.rrb-pick { border: none; background: var(--accent-soft); color: var(--accent-deep); font-weight: 800; font-size: 13px;
  border-radius: 999px; padding: 6px 12px; cursor: pointer; }

.rank-list { display: flex; flex-direction: column; gap: 8px; }
.rank-empty { background: #fff; border: 1.5px dashed var(--accent-soft); border-radius: 14px; padding: 26px 16px;
  text-align: center; font-size: 13px; font-weight: 700; color: var(--ink); opacity: .78; line-height: 1.6; }
.rank-link { display: inline-block; margin-top: 8px; border: none; background: var(--accent); color: #fff; font-weight: 800;
  font-size: 13px; border-radius: 999px; padding: 8px 14px; cursor: pointer; }
.rank-head-row { display: flex; justify-content: space-between; font-size: 12px; font-weight: 800; color: var(--ink); opacity: .6; padding: 0 6px; }
.rank-row { display: flex; align-items: center; gap: 10px; background: #fff; border: 1.5px solid var(--accent-soft);
  border-radius: 14px; padding: 11px 12px; transition: transform .12s ease; }
.rank-row.me { border-color: var(--accent); background: var(--accent-soft); }
.rank-row.top1 { border-color: var(--amber); }
.rr-rank { width: 26px; text-align: center; font-size: 15px; font-weight: 900; color: var(--accent-deep); }
.rank-row.top1 .rr-rank { font-size: 19px; }
.rr-ava { font-size: 22px; width: 36px; height: 36px; display: grid; place-items: center; background: var(--bg); border-radius: 10px; }
.rr-name { flex: 1; font-size: 14px; font-weight: 800; color: var(--ink); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.rr-meta { display: flex; flex-direction: column; align-items: flex-end; gap: 2px; }
.rr-tier { font-size: 11px; font-weight: 800; color: var(--accent-deep); opacity: .85; }
.rr-elo { font-size: 14px; font-weight: 900; color: var(--rose); }
.rank-sep { text-align: center; font-size: 11px; font-weight: 800; color: var(--accent-deep); opacity: .7; margin: 4px 0; }

/* =========================================================================
 * 桌面端（≥768px）：响应式双形态
 * 窄屏保持手机壳交互；宽屏去掉手机壳，切换为「左侧导航栏 + 宽屏主内容区」
 * ========================================================================= */
@media (min-width: 768px) {
  html, body { height: 100%; }

  .stage {
    padding: 0;
    height: 100vh;
  }

  /* 手机壳 → 铺满窗口的网格外壳 */
  .phone {
    width: 100%;
    height: 100vh;
    border-radius: 0;
    border: none;
    box-shadow: none;
    display: grid;
    grid-template-columns: 248px 1fr;
    grid-template-rows: auto 1fr;
    grid-template-areas:
      "status status"
      "side   main";
  }

  /* 隐藏仿 iOS 状态栏，桌面端不需要 */
  .statusbar { display: none; }

  /* 底部胶囊导航 → 左侧竖向导航栏 */
  .tabbar {
    grid-area: side;
    flex-direction: column;
    align-items: stretch;
    justify-content: flex-start;
    gap: 6px;
    width: 248px;
    height: 100%;
    padding: 28px 16px;
    background: var(--surface);
    border-top: none;
    border-right: 1px solid var(--border);
  }
  .tabbar::before {
    content: "数学学霸";
    display: block;
    font-family: var(--font-display);
    font-size: 18px;
    font-weight: 900;
    color: var(--accent-deep);
    padding: 6px 14px 20px;
    letter-spacing: .5px;
  }
  .tab {
    flex: none;
    flex-direction: row;
    justify-content: flex-start;
    gap: 12px;
    padding: 12px 14px;
    border-radius: 14px;
  }
  .tab:hover { background: var(--accent-soft); }
  .tab-tx { font-size: 14px; }

  /* 主内容区 */
  .viewport {
    grid-area: main;
    height: 100%;
    max-width: none;
  }
  .screen {
    max-width: 1040px;
    width: 100%;
    margin: 0 auto;
    padding: 28px 48px 48px;
  }
  .home-head { padding-top: 8px; }
  .mascot { margin-top: 42px; }

  /* 多列卡片：充分利用宽屏 */
  .entry-grid { grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); gap: 16px; }
  .chip-row { grid-template-columns: repeat(4, 1fr); }
  .recent-list,
  .manual-list,
  .rank-list {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 14px;
  }
  .rank-ladder { display: grid; grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); gap: 10px; }

  /* 答题 / 报告内容居中收窄，避免一行文字过长 */
  .quiz-wrap { max-width: 720px; margin: 0 auto; width: 100%; }
  .report-hero,
  .chip-row { max-width: 720px; margin-left: auto; margin-right: auto; }

  /* 弹层在大屏下居中并限制宽度 */
  .moment { padding: 0; }
  .moment-card { max-width: 480px; margin: 0 auto; }
  .region-card { max-width: 560px; }
  .rank-card,
  .manual-card-lg { max-width: 640px; margin: 0 auto; }

  /* toast 贴近窗口底部 */
  .toast { bottom: 28px; }
}

/* 大屏（≥1100px）：导航栏略宽、内容更舒展 */
@media (min-width: 1100px) {
  .phone { grid-template-columns: 280px 1fr; }
  .tabbar { width: 280px; }
  .screen { max-width: 1180px; padding: 32px 64px 56px; }
  .entry-grid { grid-template-columns: repeat(auto-fill, minmax(170px, 1fr)); }
}