/* ============================================================
   「我的」页（profile.html）—— 方案 B：极简学习台（去卡片化）
   设计四原则落地：
     亲密性  —— 间距分组：组内 8 / 标题-内容 12 / 子组 20 / 区块 32
     对齐    —— 全页统一左轴线 = --page-pad-x；数字格等宽居中
     重复    —— 区块标题 / 数据格 / 勋章 尺寸样式一致
     对比    —— 层级靠字号·字重·颜色，不靠卡片底色
   顺序：身份行 → 等级规则(就地展开) → 称号横滑条 → 学习数据 → 账号
   桌面：单列居中（max-width 680），延续极简气质
   ============================================================ */

.profile-view {
  display: block;
  position: relative;
  max-width: 680px;
  margin: 0 auto;
}

/* ---------- ① 身份行 ---------- */
.pf-identity {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
}

/* 头像：渐变圆盘 + 文字（经验进度改由下方进度条表达，不再用环形） */
.pf-avatar {
  position: relative;
  flex: 0 0 auto;
  width: 56px;
  height: 56px;
  padding: 0;
  border: none;
  border-radius: 50%;
  background: none;
  cursor: pointer;
  -webkit-tap-highlight-color: transparent;
  touch-action: manipulation;
}
.pf-avatar::before {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: 50%;
  background: var(--gradient-brand);
}
.pf-avatar-letter {
  position: relative;
  z-index: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  height: 100%;
  font-size: 22px;
  font-weight: 700;
  color: #fff;
  line-height: 1;
}
.pf-avatar-letter svg { width: 26px; height: 26px; }

.pf-id {
  flex: 1 1 auto;
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.pf-name {
  font-size: var(--font-size-lg);
  font-weight: 700;
  color: var(--color-text-primary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* Lv 进度条：Lv.N [███ 50/100 ░░░] Lv.N+1（取代原头像经验环） */
.pf-xp {
  display: flex;
  align-items: center;
  gap: 8px;
  width: 100%;
  max-width: 300px;
  padding: 0;
  border: none;
  background: none;
  font: inherit;
  cursor: pointer;
  -webkit-tap-highlight-color: transparent;
}
.pf-xp-lv {
  flex: 0 0 auto;
  font-size: var(--font-size-xs);
  font-weight: 700;
  color: var(--color-text-secondary);
  font-variant-numeric: tabular-nums;
  transition: color var(--duration-fast) var(--ease-smooth);
}
.pf-xp-track {
  position: relative;
  flex: 1 1 auto;
  display: flex;
  align-items: center;
  justify-content: center;
  height: 18px;
  border-radius: var(--radius-full);
  background: color-mix(in srgb, var(--color-text-primary) 8%, transparent);
  box-shadow: inset 0 0 0 1px var(--color-border-subtle);
  overflow: hidden;
}
.pf-xp-fill {
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 0;
  border-radius: var(--radius-full);
  background: color-mix(in srgb, var(--color-primary) 42%, transparent);
  transition: width var(--duration-slow) var(--ease-smooth);
}
/* 数值压在进度上：底色为浅色调，深浅主题下正文色都能保证可读 */
.pf-xp-num {
  position: relative;
  z-index: 1;
  font-size: 11px;
  font-weight: 700;
  line-height: 1;
  color: var(--color-text-primary);
  font-variant-numeric: tabular-nums;
}
.pf-xp:hover .pf-xp-lv { color: var(--color-primary); }

.pf-id-actions {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  margin-left: auto;
}
.pf-auth {
  flex: 0 0 auto;
  padding: 7px 14px;
  border: 1px solid var(--color-primary);
  border-radius: var(--radius-full);
  background: transparent;
  color: var(--color-primary);
  font: inherit;
  font-size: var(--font-size-sm);
  font-weight: 600;
  cursor: pointer;
  transition: background var(--duration-fast) var(--ease-smooth);
}
.pf-auth:hover { background: color-mix(in srgb, var(--color-primary) 8%, transparent); }

/* ---------- 等级规则（就地展开，无卡片） ---------- */
.pf-rule {
  margin: var(--space-tight) 0;
  padding: var(--spacing-md);
  border: 1px solid var(--color-border-subtle);
  border-radius: var(--radius-md);
  background: var(--color-background);
}
.pf-rule[hidden] { display: none; }
.pf-rule-next {
  margin: 0 0 8px;
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: var(--color-primary);
}
.pf-rule-title {
  margin-bottom: 8px;
  font-size: var(--font-size-sm);
  font-weight: 700;
  color: var(--color-text-primary);
}
.pf-rule-list {
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin: 0 0 8px;
  padding: 0;
  list-style: none;
}
.pf-rule-list li {
  display: flex;
  justify-content: space-between;
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
}
.pf-rule-list b { color: var(--color-primary); font-variant-numeric: tabular-nums; }
.pf-rule-note {
  margin: 0;
  font-size: var(--font-size-xs);
  line-height: 1.6;
  color: var(--color-text-tertiary);
}

/* ---------- 首用态 ---------- */
.pf-firstuse {
  margin: var(--space-tight) 0 var(--space-group);
  padding: var(--spacing-lg);
  border: 1px dashed var(--color-border);
  border-radius: var(--radius-lg);
  text-align: center;
}
.pf-firstuse[hidden] { display: none; }
.pf-firstuse .pf-fu-ico {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  margin: 0 auto var(--spacing-md);
  border-radius: 50%;
  background: var(--color-surface-1);
  color: var(--color-text-tertiary);
}
.pf-firstuse .pf-fu-ico svg { width: 22px; height: 22px; }
.pf-firstuse h3 { margin: 0 0 6px; font-size: var(--font-size-md); font-weight: 700; color: var(--color-text-primary); }
.pf-firstuse p { margin: 0; font-size: var(--font-size-sm); line-height: 1.7; color: var(--color-text-tertiary); }

/* ---------- 1px 极细分隔线（替代卡片边界） ---------- */
.pf-sep {
  border: none;
  border-top: 1px solid var(--color-border-subtle);
  margin: var(--space-group) 0;
}

/* ---------- 通用区块标题 ---------- */
.profile-section { margin: 0; }
/* 相邻区块之间保留呼吸位（称号区鼓励语为空时也不会贴到下一块） */
.profile-section + .profile-section { margin-top: var(--space-block); }
.section-title {
  margin: 0 0 var(--space-tight);
  font-size: var(--font-size-md);
  font-weight: 700;
  color: var(--color-text-primary);
}
.section-title.pf-section-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 8px;
}
.pf-head-right { display: inline-flex; align-items: baseline; gap: 10px; }
.pf-count {
  font-size: var(--font-size-xs);
  color: var(--color-text-tertiary);
  font-variant-numeric: tabular-nums;
}
.pf-more {
  font-size: var(--font-size-xs);
  font-weight: 600;
  color: var(--color-primary);
  text-decoration: none;
  white-space: nowrap;
}
.pf-more:hover { text-decoration: underline; }
.pf-dot { color: var(--color-text-tertiary); }

/* ---------- ② 我的称号：卡片横排（与学习数据同语言：白卡面 + 柔和阴影） ---------- */
.pf-badges {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  padding: var(--spacing-md);
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  box-shadow: 0 1px 2px rgba(16, 24, 40, 0.04), var(--shadow-e1);
}
.pf-badge {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  text-align: center;
  min-width: 0;
}
/* 勋章图标不再加底色圆片（覆盖 ui.css 的渐变背景），保持干净 */
.pf-badge-ico {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 64px;
  height: 64px;
  background: none;
}
.pf-badge-ico .badge-img { width: 100%; height: 100%; object-fit: contain; }
.pf-badge-ico svg { width: 40px; height: 40px; color: var(--color-primary); }

.pf-badge-name {
  font-size: 13px;
  line-height: 1.35;
  color: var(--color-text-secondary);
  overflow: hidden;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
}

/* 未解锁：去饱和压暗（同样不加底片） */
.pf-badge.locked .pf-badge-ico { background: none; filter: grayscale(1); opacity: .4; }
.pf-badge.locked .pf-badge-name { color: var(--color-text-tertiary); }

/* 已解锁：名称加深即可，图标保持干净不加光晕 */
.pf-badge.is-on .pf-badge-name { color: var(--color-text-primary); font-weight: 600; }

/* 第 N 格：成就页入口 */
.pf-badge--more {
  justify-content: center;
  color: var(--color-text-tertiary);
  text-decoration: none;
  cursor: pointer;
  transition: color var(--duration-fast) var(--ease-smooth);
}
.pf-badge--more:hover { color: var(--color-primary); }
.pf-badge--more .pf-more-num { font-size: var(--font-size-lg); font-weight: 700; font-variant-numeric: tabular-nums; }
.pf-badge--more .pf-more-label { font-size: 11px; }

/* 结业证书入口：与卡片体系同语言（白卡面 + 柔和阴影），并与上方称号网格拉开间距 */
.pf-cert-entry {
  margin-top: var(--space-block);
  padding: 16px var(--spacing-md);
  border: none;
  border-radius: var(--radius-lg);
  background: var(--color-surface);
  box-shadow: 0 1px 2px rgba(16, 24, 40, 0.04), var(--shadow-e1);
  font-size: var(--font-size-md);
  font-weight: 600;
}
.pf-cert-entry:hover {
  border: none;
  background: var(--color-surface);
  box-shadow: 0 2px 6px rgba(16, 24, 40, 0.06), var(--shadow-e2);
  color: var(--color-primary);
}

.pf-encourage {
  margin: 0;
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
}
.pf-encourage:empty { margin: 0; }

/* ---------- ③ 学习数据：4 格共用一张白卡，格间细分隔线 ---------- */
.pf-stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  column-gap: 0;
  row-gap: var(--spacing-md);
  padding: var(--spacing-md) var(--spacing-sm);
  border-radius: var(--radius-lg);
  background: var(--color-surface);
  box-shadow: 0 1px 2px rgba(16, 24, 40, 0.04), var(--shadow-e1);
}
.pf-stat-card {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 2px;
  padding: 4px 8px;
  border: none;
  border-radius: var(--radius-sm);
  background: none;
  color: inherit;
  font: inherit;
  text-align: center;
  text-decoration: none;          /* 覆盖 base.css 的 a:hover 下划线，四格交互保持一致 */
  cursor: pointer;
  -webkit-tap-highlight-color: transparent;
  transition: background var(--duration-fast) var(--ease-smooth);
}
/* 除每行首格外，左侧画一条分隔线（4 列时即 4n+1 为首格） */
.pf-stat-card:not(:nth-child(4n + 1))::before {
  content: '';
  position: absolute;
  left: 0;
  top: 10%;
  bottom: 10%;
  width: 1px;
  background: var(--color-border-subtle);
}
.pf-stat-card:hover,
.pf-stat-card:focus-visible {
  text-decoration: none;
  background: color-mix(in srgb, var(--color-primary) 6%, transparent);
}
.pf-stat-card:active { background: color-mix(in srgb, var(--color-primary) 10%, transparent); }
.pf-stat-num {
  font-size: var(--font-size-2xl);
  font-weight: 700;
  color: var(--color-primary);
  font-variant-numeric: tabular-nums;
  line-height: 1.15;
  letter-spacing: var(--letter-spacing-tight);
}
.pf-stat-num.is-empty { color: var(--color-text-tertiary); }
.pf-stat-label {
  font-size: var(--font-size-xs);
  color: var(--color-text-secondary);
  white-space: nowrap;
}

/* ---------- ④ 账号与设置：学习数据下方的分组行 ---------- */
.pf-rows {
  border-radius: var(--radius-lg);
  background: var(--color-surface);
  box-shadow: 0 1px 2px rgba(16, 24, 40, 0.04), var(--shadow-e1);
  overflow: hidden;
}
.pf-row {
  display: flex;
  align-items: center;
  gap: 12px;
  width: 100%;
  height: 52px;
  padding: 0 var(--spacing-md);
  border: none;
  background: none;
  font: inherit;
  font-size: var(--font-size-md);
  font-weight: 600;
  color: var(--color-text-primary);
  text-align: left;
  text-decoration: none;
  cursor: pointer;
  -webkit-tap-highlight-color: transparent;
  transition: background var(--duration-fast) var(--ease-smooth), color var(--duration-fast) var(--ease-smooth);
}
.pf-row[hidden] { display: none; }
.pf-row + .pf-row { border-top: 1px solid var(--color-border-subtle); }
.pf-row:hover {
  text-decoration: none;
  color: var(--color-primary);
  background: color-mix(in srgb, var(--color-primary) 4%, transparent);
}
.pf-row-ico { display: inline-flex; color: var(--color-text-secondary); }
.pf-row-ico svg { width: 20px; height: 20px; }
.pf-row:hover .pf-row-ico { color: var(--color-primary); }
.pf-row-val {
  margin-left: auto;
  color: var(--color-text-tertiary);
  font-size: var(--font-size-md);
  font-weight: 400;
}
.pf-row--danger { color: var(--status-red); }
.pf-row--danger .pf-row-ico { color: var(--status-red); }
.pf-row--danger .pf-row-val { color: var(--status-red); opacity: .55; }
.pf-row--danger:hover {
  color: var(--status-red);
  background: color-mix(in srgb, var(--status-red) 6%, transparent);
}
.pf-row--danger:hover .pf-row-ico { color: var(--status-red); }
.pf-row-badge {
  min-width: 18px;
  height: 18px;
  padding: 0 6px;
  border-radius: var(--radius-full);
  background: var(--status-red);
  color: #fff;
  font-size: 11px;
  font-weight: 700;
  line-height: 18px;
  text-align: center;
}
.pf-row-badge[hidden] { display: none; }

/* ---------- 我的反馈（my-feedback.html） ---------- */
.fb-view { max-width: 680px; margin: 0 auto; }
.fb-compose {
  padding: var(--spacing-md);
  border-radius: var(--radius-lg);
  background: var(--color-surface);
  box-shadow: 0 1px 2px rgba(16, 24, 40, 0.04), var(--shadow-e1);
}
.fb-compose .fb-title {
  margin: 0 0 10px;
  font-size: var(--font-size-md);
  font-weight: 700;
}
.fb-compose textarea {
  width: 100%;
  min-height: 92px;
  padding: 10px 12px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-background);
  color: var(--color-text-primary);
  font: inherit;
  font-size: var(--font-size-sm);
  line-height: 1.7;
  resize: vertical;
}
.fb-compose .fb-acts {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-top: 10px;
}
.fb-compose .fb-hint {
  font-size: var(--font-size-xs);
  color: var(--color-text-tertiary);
}
.fb-btn {
  padding: 8px 18px;
  border: none;
  border-radius: var(--radius-full);
  background: var(--color-primary);
  color: var(--color-on-primary);
  font: inherit;
  font-size: var(--font-size-sm);
  font-weight: 600;
  cursor: pointer;
}
.fb-btn:hover { background: var(--color-primary-hover); }
.fb-btn:disabled { opacity: .5; cursor: not-allowed; }

.fb-list { margin-top: var(--space-block); display: flex; flex-direction: column; gap: 12px; }
.fb-item {
  padding: var(--spacing-md);
  border-radius: var(--radius-lg);
  background: var(--color-surface);
  box-shadow: 0 1px 2px rgba(16, 24, 40, 0.04), var(--shadow-e1);
}
.fb-item.is-unread { border-left: 3px solid var(--color-primary); }
.fb-item-hd {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 8px;
  font-size: var(--font-size-xs);
  color: var(--color-text-tertiary);
}
.fb-item-hd .q {
  font-weight: 700;
  color: var(--color-text-primary);
  font-size: var(--font-size-sm);
}
.fb-item-hd .dot-new {
  margin-left: auto;
  padding: 1px 8px;
  border-radius: var(--radius-full);
  background: var(--tag-ok-bg);
  color: var(--tag-ok-fg);
  font-weight: 700;
}
.fb-note {
  font-size: var(--font-size-sm);
  line-height: 1.8;
  color: var(--color-text-secondary);
  white-space: pre-wrap;
  word-break: break-word;
}
.fb-reply {
  margin-top: 12px;
  padding: 12px 14px;
  border-radius: var(--radius-md);
  border: 1px solid color-mix(in srgb, var(--status-emerald) 32%, transparent);
  background: var(--tag-ok-bg);
}
.fb-reply .who {
  margin-bottom: 4px;
  font-size: var(--font-size-xs);
  font-weight: 700;
  color: var(--tag-ok-fg);
}
.fb-reply .txt {
  font-size: var(--font-size-sm);
  line-height: 1.8;
  color: var(--color-text-primary);
  white-space: pre-wrap;
  word-break: break-word;
}
.fb-wait {
  margin-top: 10px;
  font-size: var(--font-size-xs);
  color: var(--color-text-tertiary);
}

/* ---------- 未登录（首用态）隐藏区块 ---------- */
/* 账号区不隐藏：未登录时也要能进设置，只是没有「退出登录」行 */
.pf-view-guest .pf-rule,
.pf-view-guest #pfBadgeSection,
.pf-view-guest #pfStatsSection { display: none; }

/* ---------- 面板态：展开子页面时隐藏主内容 ---------- */
.profile-view.showing-mistake > *:not(#mistakePanel),
.profile-view.showing-quiz > *:not(#quizProgressPanel),
.profile-view.showing-pwd > *:not(#pwdPanel) { display: none; }

/* ---------- 面板头部统一为顶栏（返回 + 居中标题），对齐闯关 app-topbar ---------- */
.qp-head, .mb-head {
  display: grid;
  grid-template-columns: 44px 1fr 44px;
  align-items: center;
  gap: 8px;
  margin: 0 0 4px;
  padding: 10px 0;
  background: var(--color-background);
  border-bottom: 1px solid var(--color-border);
}
.qp-head .nav-back, .mb-head .nav-back {
  grid-column: 1;
  width: 38px;
  height: 38px;
  margin: 0;
  position: static;
}
.qp-head h2, .mb-head h2 {
  grid-column: 2;
  margin: 0;
  text-align: center;
  font-size: var(--font-size-lg);
  font-weight: 600;
  color: var(--color-text-primary);
}

/* ---------- 全部称号页（achievements.html 复用本文件） ---------- */
.ach-page {
  position: fixed;
  inset: 0;
  z-index: 1100;
  overflow-y: auto;
  background: var(--color-background);
  padding: 0 16px calc(48px + env(safe-area-inset-bottom, 0px));
}
.ach-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--spacing-md);
  margin-top: var(--spacing-lg);
}
.ach-state { font-size: 10px; color: var(--color-text-tertiary); }

/* 成就页进度条（此前无样式，这里补上以可视化收集进度） */
.pf-progress {
  height: 8px;
  border-radius: 999px;
  background: var(--color-surface-2, #f3f4f8);
  overflow: hidden;
  margin-top: var(--spacing-lg);
}
.pf-progress-fill {
  height: 100%;
  width: 0;
  border-radius: 999px;
  background: var(--gradient-brand);
  transition: width var(--duration-base, .4s) var(--ease-smooth);
}

/* 成就页「成长之路」引导：英雄区 + 下一步卡 + 勋章序号，强化继续学习的情绪价值 */
.ach-hero {
  margin-top: var(--spacing-md);
  padding: var(--spacing-lg) var(--spacing-md);
  border-radius: 0;
  background: var(--hero-grad);
  color: #fff;
  text-align: center;
}
.ach-hero-title { font-size: var(--font-size-md); font-weight: 700; opacity: .92; }
.ach-hero-count { font-size: 28px; font-weight: 800; margin: 6px 0 2px; font-variant-numeric: tabular-nums; }
.ach-hero-count small { font-size: 14px; font-weight: 600; opacity: .85; }
.ach-hero-copy { margin: 8px 0 0; font-size: var(--font-size-sm); opacity: .92; line-height: 1.5; }
.ach-cta {
  display: inline-flex; align-items: center; justify-content: center; gap: 6px;
  margin-top: var(--spacing-md);
  padding: 12px 20px;
  border: none;
  border-radius: var(--radius-full);
  background: #fff;
  color: var(--color-primary);
  font: inherit; font-size: var(--font-size-md); font-weight: 700;
  text-decoration: none;
  cursor: pointer;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.12);
}
.ach-cta:hover { transform: translateY(-1px); }
.ach-next {
  display: flex; align-items: center; gap: 12px;
  margin-top: var(--spacing-md);
  padding: var(--spacing-md);
  border-radius: var(--radius-lg);
  background: var(--color-surface);
  box-shadow: 0 1px 2px rgba(16, 24, 40, 0.04), var(--shadow-e1);
}
.ach-next-ico {
  flex: 0 0 auto;
  width: 44px; height: 44px; border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  background: var(--gradient-brand); color: #fff; font-size: 22px;
}
.ach-next-body { flex: 1; min-width: 0; text-align: left; }
.ach-next-label { font-size: var(--font-size-xs); color: var(--color-text-tertiary); }
.ach-next-title { font-size: var(--font-size-md); font-weight: 700; color: var(--color-text-primary); margin: 2px 0 4px; }
.ach-next-go {
  display: inline-flex; align-items: center; gap: 4px;
  border: none; background: none; padding: 0;
  color: var(--color-primary); font: inherit; font-size: var(--font-size-sm); font-weight: 600;
  cursor: pointer;
}
/* 勋章序号角标：呼应「成长之路」第 N 关 */
.pf-badge-step {
  position: absolute; top: -6px; left: 50%; transform: translateX(-50%);
  min-width: 18px; height: 18px; padding: 0 4px;
  display: flex; align-items: center; justify-content: center;
  border-radius: 999px;
  background: var(--color-surface-2, #f3f4f8);
  color: var(--color-text-tertiary);
  font-size: 10px; font-weight: 700;
  border: 1.5px solid var(--color-background);
}
.pf-badge.is-on .pf-badge-step { background: var(--color-primary); color: var(--color-on-primary, #fff); }

/* ---------- 头像更改 ---------- */
.pf-avatar-wrap { position: relative; flex: 0 0 auto; }
.pf-avatar-edit {
  position: absolute;
  right: -2px;
  bottom: -2px;
  width: 22px;
  height: 22px;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0;
  border: 2px solid var(--color-background);
  border-radius: 50%;
  background: var(--gradient-brand);
  color: #fff;
  cursor: pointer;
  box-shadow: 0 1px 3px rgba(16, 24, 40, 0.2);
  -webkit-tap-highlight-color: transparent;
}
.pf-avatar-edit svg { width: 12px; height: 12px; }
.pf-avatar-img { width: 100%; height: 100%; object-fit: cover; border-radius: 50%; }

.avatar-fs {
  position: fixed;
  inset: 0;
  z-index: 1200;
  display: flex;
  flex-direction: column;
  background: var(--color-background);
  padding-bottom: env(safe-area-inset-bottom, 0px);
}
.avatar-fs[hidden] { display: none; }
.avatar-fs-head {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 12px 16px;
  border-bottom: 1px solid var(--color-border-subtle);
}
.avatar-fs-close {
  flex: 0 0 auto;
  width: 40px; height: 40px;
  display: inline-flex; align-items: center; justify-content: center;
  border: none; border-radius: 50%;
  background: var(--color-surface-2, #f3f4f8);
  color: var(--color-text-primary);
  cursor: pointer;
  -webkit-tap-highlight-color: transparent;
}
.avatar-fs-close svg { width: 22px; height: 22px; }
.avatar-fs-title {
  flex: 1;
  text-align: center;
  font-size: var(--font-size-lg);
  font-weight: 700;
  color: var(--color-text-primary);
  margin-right: 40px;
}
.avatar-fs-body {
  flex: 1;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
  padding: 24px 16px;
}
.avatar-fs-preview {
  width: 120px; height: 120px;
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  background: var(--gradient-brand);
  color: #fff; font-size: 52px; line-height: 1;
  overflow: hidden;
  box-shadow: 0 8px 24px rgba(16, 24, 40, 0.18);
}
.avatar-fs-preview img { width: 100%; height: 100%; object-fit: cover; border-radius: 50%; }
.avatar-fs-hint { margin: 0; font-size: var(--font-size-sm); color: var(--color-text-secondary); text-align: center; }
.avatar-emojis { display: grid; grid-template-columns: repeat(5, 1fr); gap: 10px; width: 100%; max-width: 420px; }
.avatar-emoji {
  aspect-ratio: 1;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  background: var(--color-surface-2, #f3f4f8);
  font-size: 32px;
  line-height: 1;
  cursor: pointer;
  transition: border-color var(--duration-fast) var(--ease-smooth), transform var(--duration-fast) var(--ease-smooth);
}
.avatar-emoji:hover, .avatar-emoji.is-active { border-color: var(--color-primary); transform: scale(1.06); }
.avatar-fs-upload, .avatar-fs-reset {
  width: 100%; max-width: 420px; text-align: center;
}
.avatar-upload-btn, .avatar-ghost-btn {
  padding: 14px 16px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-full);
  background: var(--color-surface);
  color: var(--color-text-secondary);
  font: inherit;
  font-size: var(--font-size-md);
  font-weight: 600;
  cursor: pointer;
  transition: border-color var(--duration-fast) var(--ease-smooth), color var(--duration-fast) var(--ease-smooth);
}
.avatar-upload-btn:hover, .avatar-ghost-btn:hover { border-color: var(--color-primary); color: var(--color-primary); }
.pf-badge.is-on .ach-state { color: var(--color-primary); }

/* ---------- 错题本：渐变Hero + 玻璃态数据卡/功能卡 ---------- */
.mb-hero {
  background: var(--hero-grad);
  padding: 0 0 24px;
  position: relative;
  overflow: hidden;
  border-radius: 0 0 var(--hero-radius) var(--hero-radius);
}
.mb-hero::before {
  content: ''; position: absolute; top: -40px; right: -30px;
  width: 150px; height: 150px; background: var(--hero-spot); border-radius: 50%;
}
.mb-hero::after {
  content: ''; position: absolute; bottom: 30px; left: -25px;
  width: 90px; height: 90px; background: var(--hero-spot); border-radius: 50%;
}
.mb-hero > * { position: relative; z-index: 2; }

/* 渐变区内导航栏 */
.mb-hero-nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 16px 4px;
}
.mb-hero-nav .nav-back {
  width: 36px; height: 36px;
  border-radius: 50%;
  background: rgba(255,255,255,0.2);
  display: flex; align-items: center; justify-content: center;
  color: #fff;
  border: none;
  cursor: pointer;
}
.mb-hero-nav .nav-back svg { width: 18px; height: 18px; stroke: #fff; }
.mb-hero-nav .nav-title {
  font-size: 17px; font-weight: 700; color: #fff;
  display: flex; align-items: center; gap: 6px;
}
.mb-hero-nav .nav-title svg { width: 18px; height: 18px; stroke: #fff; }
.mb-hero-nav .nav-spacer { width: 36px; }

/* 3数据卡：flex:1 等宽，玻璃态 */
.mb-stats {
  display: flex;
  gap: 8px;
  padding: 12px 14px 0;
}
.mb-stat-card {
  flex: 1;
  background: var(--hero-glass-bg);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border: 1px solid rgba(255,255,255,0.2);
  border-radius: 12px;
  padding: 12px 6px;
  text-align: center;
  color: #fff;
}
.mb-stat-num {
  font-size: 24px;
  font-weight: 800;
  color: #fff;
  line-height: 1.2;
}
.mb-stat-label {
  font-size: 11px;
  color: rgba(255,255,255,0.9);
  font-weight: 500;
  margin-top: 2px;
}

/* 功能卡：玻璃态，放在渐变区内 */
.mb-actions {
  display: flex;
  gap: 10px;
  padding: 12px 14px 0;
}
.mb-action-card {
  flex: 1;
  display: flex;
  align-items: flex-start;
  gap: 10px;
  padding: 14px 12px;
  background: var(--hero-glass-bg-strong);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid rgba(255,255,255,0.25);
  border-radius: 14px;
  cursor: pointer;
  transition: background .2s;
  text-align: left;
  color: #fff;
}
.mb-action-card:active { background: rgba(255,255,255,0.30); }
.mb-action-card.primary {
  background: rgba(255,255,255,0.25);
}
.mb-action-ico {
  width: 34px; height: 34px;
  border-radius: 10px;
  background: rgba(255,255,255,0.25);
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0;
  color: #fff;
}
.mb-action-ico svg {
  width: 18px; height: 18px; stroke: #fff; fill: none;
  stroke-width: 2; stroke-linecap: round; stroke-linejoin: round;
}
.mb-action-text {
  flex: 1;
  min-width: 0;
}
.mb-action-title {
  font-size: 14px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 2px;
}
.mb-action-desc {
  font-size: 11px;
  color: rgba(255,255,255,0.85);
}

/* 白色内容区 */
.mb-body {
  padding: 18px 14px;
  background: var(--body-soft);
}

/* ---------- 错题本：按模块浏览宫格 ---------- */
.mb-modules {
  margin-bottom: 16px;
}
.mb-modules-title {
  font-size: 14px;
  font-weight: 700;
  color: var(--color-text-primary, #1A1A1A);
  margin-bottom: 10px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.mb-module-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(90px, 1fr));
  gap: 8px;
}
.mb-module-item {
  background: var(--color-surface, #fff);
  border: 1px solid var(--color-border-subtle, #F3F4F6);
  border-radius: 12px;
  padding: 12px 8px;
  text-align: center;
  cursor: pointer;
  transition: all 0.15s ease;
}
.mb-module-item:hover {
  border-color: var(--color-primary, #5E6AD2);
  background: rgba(94,106,210,0.04);
}
.mb-module-item.active {
  border-color: var(--color-primary, #5E6AD2);
  background: rgba(94,106,210,0.08);
}
.mb-module-count {
  font-size: 20px;
  font-weight: 800;
  color: var(--color-primary, #5E6AD2);
  line-height: 1;
  margin-bottom: 4px;
}
.mb-module-name {
  font-size: 11px;
  color: var(--color-text-secondary, #6B7280);
  font-weight: 500;
}

/* ============================================================
   2026-09-11 错题本重做（参考：docs/方案一原型-一体化渐变融合.html）
   彩色封面宫格 + 薄弱点分析弹层 + 清空错题本移至列表底部
   ============================================================ */
/* 「全部 N 题 ›」入口 */
.mb-modules-title .mb-modules-more {
  font-size: 11px;
  color: var(--color-text-tertiary, #6B7280);
  font-weight: 500;
  border: none;
  background: transparent;
  padding: 0;
  cursor: pointer;
  font-family: inherit;
}
.mb-modules-title .mb-modules-more:hover { color: var(--color-primary, #5E6AD2); }

/* 列表视图顶部条：仅返回图标 + 模块标题 */
.mb-subhead {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 14px;
  background: var(--color-background, #fff);
  position: sticky;
  top: 0;
  z-index: 5;
  border-bottom: 1px solid var(--color-border-subtle, #F3F4F6);
}
.mb-sub-back {
  width: 32px;
  height: 32px;
  flex: 0 0 32px;
  border-radius: 50%;
  border: 1px solid var(--color-border, #E5E7EB);
  background: var(--color-surface, #fff);
  color: var(--color-text-primary, #1A1A1A);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  padding: 0;
}
.mb-sub-back svg { width: 16px; height: 16px; }
.mb-sub-title {
  font-size: 15px;
  font-weight: 700;
  color: var(--color-text-primary, #1A1A1A);
}

.mb-module-grid {
  grid-template-columns: repeat(3, 1fr);
  gap: 8px;
}

/* 封面卡片：背景走 --cover 变量，hover 不再被旧白底规则冲掉 */
.mb-module-item {
  aspect-ratio: 3 / 4;
  border-radius: 10px;
  padding: 8px 6px;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  position: relative;
  overflow: hidden;
  border: none;
  background: var(--cover, var(--color-surface, #fff));
  box-shadow: 0 3px 10px rgba(0, 0, 0, 0.08);
  color: var(--cover-fg, #fff);
  transition: transform 0.15s ease;
}
.mb-module-item:hover {
  transform: translateY(-2px);
  border: none;
  background: var(--cover, var(--color-surface, #fff));
}
.mb-module-item.active {
  border: none;
  background: var(--cover, var(--color-surface, #fff));
  box-shadow: 0 0 0 2px #fff, 0 0 0 4px var(--color-primary, #5E6AD2), 0 3px 10px rgba(0, 0, 0, 0.12);
}
.mb-module-item .mb-module-name {
  font-size: 12px;
  font-weight: 800;
  color: var(--cover-fg, #fff);
  text-shadow: 0 1px 3px rgba(0, 0, 0, 0.2);
  line-height: 1.2;
  position: relative;
  z-index: 1;
}
.mb-book-count {
  font-size: 10px;
  color: var(--cover-fg, #fff);
  opacity: 0.9;
  font-weight: 500;
  margin-top: 2px;
  position: relative;
  z-index: 1;
}
.mb-book-badge {
  position: absolute;
  top: 5px;
  right: 5px;
  min-width: 16px;
  height: 16px;
  padding: 0 4px;
  background: var(--status-red, #B91C1C);
  color: #fff;
  border-radius: 8px;
  font-size: 9px;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 2;
}
.mb-book-deco {
  position: absolute;
  bottom: -8px;
  right: -8px;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.12);
  z-index: 0;
}

.mb-module-item.cov-purple { --cover: var(--cover-purple); }
.mb-module-item.cov-orange { --cover: var(--cover-orange); }
.mb-module-item.cov-teal { --cover: var(--cover-teal); }
.mb-module-item.cov-rose { --cover: var(--cover-rose); }
.mb-module-item.cov-indigo { --cover: var(--cover-indigo); }
.mb-module-item.cov-amber { --cover: var(--cover-amber); }
/* 高亮封面（琥珀/青/橙）白字仅 1.5–2.5:1，改用深色文字 */
.mb-module-item.cov-orange,
.mb-module-item.cov-teal,
.mb-module-item.cov-amber { --cover-fg: #1A1A1A; }

.mb-list-foot {
  display: flex;
  justify-content: center;
  margin-top: 18px;
}
.mb-clear-btn {
  padding: 9px 18px;
  border-radius: 12px;
  border: 1px solid var(--color-border, #E5E7EB);
  background: var(--color-surface, #fff);
  color: var(--color-text-tertiary, #6B7280);
  font-size: 12px;
  cursor: pointer;
}
.mb-clear-btn:hover {
  color: var(--status-red, #B91C1C);
  border-color: var(--status-red, #B91C1C);
}

/* 薄弱点分析弹层 */
.mb-weak-mask {
  position: fixed;
  inset: 0;
  background: rgba(15, 17, 21, 0.45);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  z-index: 200;
}
.mb-weak-panel {
  width: 100%;
  max-width: 360px;
  background: var(--modal-bg, #fff);
  color: var(--modal-text, #1A1A1A);
  border: 1px solid var(--modal-border, #E5E7EB);
  border-radius: 16px;
  padding: 16px;
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.2);
}
.mb-weak-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 15px;
  font-weight: 700;
}
.mb-weak-close {
  border: none;
  background: transparent;
  font-size: 20px;
  line-height: 1;
  color: var(--color-text-tertiary, #6B7280);
  cursor: pointer;
}
.mb-weak-sub {
  font-size: 11px;
  color: var(--color-text-tertiary, #6B7280);
  margin: 4px 0 8px;
}
.mb-weak-empty {
  font-size: 12px;
  color: var(--color-text-secondary, #6B7280);
  padding: 10px 0;
}
.mb-weak-row {
  width: 100%;
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 8px;
  border-radius: 10px;
  border: none;
  background: transparent;
  color: inherit;
  text-align: left;
  cursor: pointer;
}
.mb-weak-row:hover { background: var(--color-surface-1, rgba(255, 255, 255, 0.08)); }
.mb-weak-name { flex: 0 0 84px; font-size: 13px; font-weight: 600; }
.mb-weak-bar {
  flex: 1;
  height: 6px;
  border-radius: 99px;
  background: var(--color-border-subtle, #F3F4F6);
  overflow: hidden;
}
.mb-weak-fill {
  display: block;
  height: 100%;
  border-radius: 99px;
  background: var(--hero-grad);
}
.mb-weak-num {
  flex: 0 0 auto;
  font-size: 11px;
  font-weight: 600;
  color: var(--color-primary, #5E6AD2);
}