/* ============ 考公脑库 · 组合方案 E：B日间 + A夜间 + C激励 ============ */
:root{
  /* 日间：游戏化养成 · 元气紫（方案 C 配色） */
  --bg: #f6f4ff; --card: #ffffff; --line: #eae6f6; --line2: #ddd7f0;
  --ink: #25203b; --ink-2: #6f6a87; --ink-3: #a39ebc;
  --brand: #6c5ce7; --brand-2: #8f7bf3; --brand-soft: #f3effe;
  --brand-grad: linear-gradient(135deg, #7c5cf0, #4f46e5);
  --accent: #f0a732; --accent-soft: #fdf3e0;
  --ok: #16a34a; --ok-soft: #eefaf1; --ok-ink: #0f7a3d;
  --bad: #e5484d; --bad-soft: #fdeeee; --bad-ink: #b52e33;
  --chip-bg: #f1edfc; --chip-ink: #6f6a87;
  --chip-on: #6c5ce7; --chip-on-ink: #ffffff;
  --w3: #8b6ff0; --w4: #6c5ce7; --w0: #e7e1f8;
  --hl: #fdf3e0; --hl-ink: #8a6110;
  --radius: 16px; --radius-lg: 20px;
  --shadow: 0 2px 6px rgba(76,60,160,.06), 0 10px 30px rgba(76,60,160,.10);
  --shadow-lg: 0 12px 34px rgba(76,60,160,.16);
  --tabbar-h: 58px;
  --safe-b: env(safe-area-inset-bottom, 0px);
  color-scheme: light;
}
/* ===== 夜间：沉浸暗色（A 方案）· 手动指定 ===== */
:root[data-theme="dark"]{
  --bg: #0b0f1a; --card: #121a2b; --line: #1e2940; --line2: #26334d;
  --ink: #e9edf6; --ink-2: #9aa6bd; --ink-3: #5f6b82;
  --brand: #8fa0ff; --brand-2: #aebaff; --brand-soft: rgba(106,126,220,.17);
  --brand-grad: linear-gradient(135deg, #6d5ce8, #4f46e5);
  --accent: #f0a74f; --accent-soft: rgba(201,123,30,.16);
  --ok: #3ecf87; --ok-soft: rgba(62,207,135,.11); --ok-ink: #7ce0a8;
  --bad: #f07171; --bad-soft: rgba(240,113,113,.11); --bad-ink: #f8b4b4;
  --chip-bg: #1a2340; --chip-ink: #9aa6bd;
  --chip-on: #2b3a63; --chip-on-ink: #dfe6ff;
  --w3: #f0a74f; --w4: #dd8a2a; --w0: #1e2940;
  --hl: rgba(240,167,79,.2); --hl-ink: #f0b45c;
  --shadow: 0 1px 3px rgba(0,0,0,.4);
  --shadow-lg: 0 12px 34px rgba(0,0,0,.5);
  color-scheme: dark;
}
/* ===== 夜间：跟随系统（默认 auto） ===== */
@media (prefers-color-scheme: dark){
  :root:not([data-theme="light"]):not([data-theme="kb"]):not([data-theme="mag"]){
    --bg: #0b0f1a; --card: #121a2b; --line: #1e2940; --line2: #26334d;
    --ink: #e9edf6; --ink-2: #9aa6bd; --ink-3: #5f6b82;
    --brand: #8fa0ff; --brand-2: #aebaff; --brand-soft: rgba(106,126,220,.17);
    --brand-grad: linear-gradient(135deg, #6d5ce8, #4f46e5);
    --accent: #f0a74f; --accent-soft: rgba(201,123,30,.16);
    --ok: #3ecf87; --ok-soft: rgba(62,207,135,.11); --ok-ink: #7ce0a8;
    --bad: #f07171; --bad-soft: rgba(240,113,113,.11); --bad-ink: #f8b4b4;
    --chip-bg: #1a2340; --chip-ink: #9aa6bd;
    --chip-on: #2b3a63; --chip-on-ink: #dfe6ff;
    --w3: #f0a74f; --w4: #dd8a2a; --w0: #1e2940;
    --hl: rgba(240,167,79,.2); --hl-ink: #f0b45c;
    --shadow: 0 1px 3px rgba(0,0,0,.4);
    --shadow-lg: 0 12px 34px rgba(0,0,0,.5);
    color-scheme: dark;
  }
}
/* ===== 知识库：极简石墨（方案 D 配色）· 固定浅色，不随系统深浅切换 ===== */
:root[data-theme="kb"]{
  --bg: #f6f5f2; --card: #ffffff; --line: #e9e7e2; --line2: #ddd9d1;
  --ink: #1d2129; --ink-2: #5c626d; --ink-3: #9aa0aa;
  --brand: #2d5cff; --brand-2: #4d76ff; --brand-soft: #eef0ff;
  --brand-grad: linear-gradient(135deg, #1d2129, #3a4150);
  --accent: #8a6513; --accent-soft: #f6f0e2;
  --ok: #0e8345; --ok-soft: #e8f4ee; --ok-ink: #0d5e33;
  --bad: #cf3e3e; --bad-soft: #fdf0f0; --bad-ink: #8f2a2a;
  --chip-bg: #efeee9; --chip-ink: #5c626d;
  --chip-on: #1d2129; --chip-on-ink: #ffffff;
  --w3: #8a8f98; --w4: #5c626d; --w0: #e9e7e2;
  --hl: #f6f0e2; --hl-ink: #7a5a10;
  --radius: 10px; --radius-lg: 12px;
  --shadow: none;
  --shadow-lg: 0 8px 24px rgba(29,33,41,.10);
  --tabbar-h: 58px;
  --safe-b: env(safe-area-inset-bottom, 0px);
  color-scheme: light;
}
/* ===== 杂志：现代编辑风（方案 B 配色）· 固定浅色 ===== */
:root[data-theme="mag"]{
  --bg: #f7f5f0; --card: #ffffff; --line: #eceae3; --line2: #e0ddd3;
  --ink: #20242c; --ink-2: #6b7078; --ink-3: #a0a49e;
  --brand: #4f63d2; --brand-2: #6b7ef0; --brand-soft: #eef0fb;
  --brand-grad: linear-gradient(135deg, #4f63d2, #6b7ef0);
  --accent: #c97b1e; --accent-soft: #faf0df;
  --ok: #169a5d; --ok-soft: #eef8f2; --ok-ink: #105c3a;
  --bad: #d64949; --bad-soft: #fdf0f0; --bad-ink: #8f2a2a;
  --chip-bg: #f0eee8; --chip-ink: #6b7078;
  --chip-on: #1d2129; --chip-on-ink: #ffffff;
  --w3: #f0b45c; --w4: #e08a1c; --w0: #eceae3;
  --hl: #fff5dd; --hl-ink: #8a6110;
  --radius: 16px; --radius-lg: 20px;
  --shadow: 0 1px 2px rgba(32,36,44,.04), 0 8px 24px rgba(32,36,44,.06);
  --shadow-lg: 0 12px 34px rgba(32,36,44,.14);
  --tabbar-h: 58px;
  --safe-b: env(safe-area-inset-bottom, 0px);
  color-scheme: light;
}

* { box-sizing: border-box; -webkit-tap-highlight-color: transparent; }
html { height: 100%; }
body { margin: 0; min-height: 100%; }
/* min-height 而非 height：内容超高时 body 随之增长，padding-bottom 才能真实产生滚动余量，
   避免固定底栏盖住页面底部内容（如「我的」页收藏/错题/历史按钮） */
body {
  font-family: -apple-system, "PingFang SC", "Noto Sans SC", "Microsoft YaHei", sans-serif;
  background: var(--bg); color: var(--ink);
  padding-bottom: calc(var(--tabbar-h) + var(--safe-b));
  overscroll-behavior-y: none;
}
.hidden { display: none !important; }
.center { text-align: center; }
.spacer { flex: 1; }

/* ---------- 离线横幅（置顶警示） ---------- */
#offline-banner {
  position: sticky; top: 0; z-index: 45;
  background: #7a5a19; color: #fff; text-align: center;
  font-size: 12px; padding: 5px 10px;
}

/* ---------- 页面与卡片 ---------- */
.tabpage { padding: 12px 14px 24px; max-width: 720px; margin: 0 auto; }
.card {
  background: var(--card); border: 1px solid var(--line); border-radius: var(--radius-lg);
  box-shadow: var(--shadow); padding: 16px; margin-bottom: 12px;
}
.card h2 { margin: 0 0 12px; font-size: 18px; }
.card h3 { margin: 0 0 10px; font-size: 14px; color: var(--ink-2); letter-spacing: .3px; }
.hint { margin-top: 10px; font-size: 12px; color: var(--ink-3); line-height: 1.6; }

/* ---------- 首页 hero + 目标环（C 元素） ---------- */
.home-hero { margin: 6px 2px 0; }
.hh-title { font-size: 22px; font-weight: 800; letter-spacing: -.4px; }
.hh-sub { font-size: 12.5px; color: var(--ink-2); margin-top: 4px; }
.hh-sub b { color: var(--accent); font-weight: 700; }
.goalrow {
  display: flex; align-items: center; gap: 14px; width: 100%; text-align: left;
  background: var(--card); border: 1px solid var(--line); border-radius: var(--radius-lg);
  box-shadow: var(--shadow); padding: 13px 16px; margin-top: 12px; cursor: pointer; font-family: inherit;
}
.goalrow:active { transform: scale(.985); }
.gring { position: relative; flex: none; width: 62px; height: 62px; }
.gring svg { transform: rotate(-90deg); }
.gring .gt { stroke: var(--w0); }
.gring .gv { stroke: var(--brand); transition: stroke-dashoffset .6s; }
.gring .gm { position: absolute; inset: 0; display: flex; flex-direction: column; align-items: center; justify-content: center; }
.gring .gm b { font-size: 16px; color: var(--brand); font-variant-numeric: tabular-nums; }
.gring .gm span { font-size: 9px; color: var(--ink-3); }
.goalrow .gd { flex: 1; min-width: 0; }
.goalrow .gd b { font-size: 14px; display: block; }
.goalrow .gd small { display: block; font-size: 11px; color: var(--ink-3); margin-top: 4px; line-height: 1.6; }
.goalrow .go { flex: none; font-size: 12.5px; color: var(--brand); font-weight: 700; }

/* ---------- 模块宫格（B 元素） ---------- */
.mgrid { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; margin: 12px 0; }
.mcell {
  border: 1px solid var(--line); text-align: left; background: var(--card);
  border-radius: var(--radius-lg); box-shadow: var(--shadow); padding: 14px 14px 12px;
  cursor: pointer; position: relative; overflow: hidden; font-family: inherit;
}
.mcell:active { transform: scale(.97); }
.mcell::before { content: ""; position: absolute; left: 0; top: 0; right: 0; height: 4px; background: var(--mc, var(--brand)); }
.mcell .num { font-size: 10.5px; font-weight: 700; letter-spacing: 1px; color: var(--mc, var(--brand)); text-transform: uppercase; }
.mcell b { display: block; font-size: 15.5px; margin-top: 7px; color: var(--ink); }
.mcell .cnt { display: block; font-size: 11px; color: var(--ink-3); margin-top: 3px; }
.mcell .stat { position: absolute; right: 12px; top: 13px; font-size: 17px; opacity: .9; }
.mcell .tag { position: absolute; right: 12px; top: 30px; font-size: 10px; color: var(--ink-3); }
.mcell.total {
  background: var(--brand-grad);
}
.mcell.total::before { background: var(--accent); }
.mcell.total b { color: #fff; }
.mcell.total .num { color: var(--accent); }
.mcell.total .cnt, .mcell.total .tag { color: rgba(255,255,255,.65); }

/* ---------- 筛选 ---------- */
.filter-card .fc-head { display: flex; align-items: baseline; gap: 10px; margin-bottom: 10px; }
.filter-card .fc-head h3 { margin: 0; font-size: 14px; letter-spacing: .3px; }
.fc-count { margin-left: auto; font-size: 12px; color: var(--brand); font-weight: 700; font-variant-numeric: tabular-nums; }
.filters { display: grid; grid-template-columns: 1fr 1fr; gap: 9px; }
.filters label { display: flex; flex-direction: column; gap: 4px; font-size: 11.5px; color: var(--ink-2); }
.filters select, .filters input[type="search"] {
  appearance: none; -webkit-appearance: none;
  background: var(--card); color: var(--ink);
  border: 1.5px solid var(--line2); border-radius: 11px;
  padding: 9px 10px; font-size: 13.5px; width: 100%;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='10' height='6'%3E%3Cpath d='M1 1l4 4 4-4' stroke='%23888' fill='none' stroke-width='1.6'/%3E%3C/svg%3E");
  background-repeat: no-repeat; background-position: right 11px center;
}
.filters label:last-child { grid-column: span 2; }
.filters.compact { grid-template-columns: 1fr 1fr; margin-bottom: 10px; }
.filters.compact label { grid-column: auto; }
.status { margin-top: 12px; font-size: 13px; color: var(--brand); font-weight: 600; }

/* ---------- 按钮 ---------- */
.actions { display: flex; gap: 10px; margin-top: 14px; }
button {
  font-family: inherit; cursor: pointer;
  border-radius: 14px; border: none; font-size: 15px;
  padding: 13px 16px; transition: transform .05s;
}
button:active { transform: scale(.97); }
button.primary {
  background: var(--brand-grad); color: #fff; flex: 1; font-weight: 800;
  box-shadow: 0 8px 18px color-mix(in srgb, var(--brand) 28%, transparent);
}
button.primary.wide { width: 100%; flex: none; }
button.ghost { background: var(--chip-bg); color: var(--ink); border: 1px solid var(--line); }
button:disabled { opacity: .45; }

/* ---------- 底部导航 ---------- */
#tabbar {
  position: fixed; left: 0; right: 0; bottom: 0; z-index: 50;
  display: flex; justify-content: space-around;
  background: var(--card); border-top: 1px solid var(--line);
  padding-bottom: var(--safe-b);
  backdrop-filter: blur(12px);
}
.tab {
  background: transparent; color: var(--ink-2); border: none;
  display: flex; flex-direction: column; align-items: center; gap: 3px;
  font-size: 11px; padding: 8px 0 7px; width: 100%;
}
.tab .t-ico { font-size: 19px; line-height: 1; }
.tab.active { color: var(--ink); font-weight: 800; }
.tab.active .t-ico { color: var(--brand); }

/* ---------- 搜索 ---------- */
.searchbar { margin-bottom: 10px; }
.searchbar input {
  width: 100%; padding: 13px 15px; font-size: 15px;
  border-radius: 14px; border: 1.5px solid var(--line2);
  background: var(--card); color: var(--ink); box-shadow: var(--shadow);
}
.searchbar input:focus { outline: 2px solid color-mix(in srgb, var(--brand) 35%, transparent); border-color: transparent; }
.chips { display: flex; gap: 8px; margin-bottom: 10px; overflow-x: auto; scrollbar-width: none; }
.chips::-webkit-scrollbar { display: none; }
.chip {
  background: var(--chip-bg); color: var(--ink-2);
  padding: 7px 14px; border-radius: 999px; font-size: 13px; white-space: nowrap; border: 1px solid transparent;
}
.chip.active { background: var(--chip-on); color: var(--chip-on-ink); font-weight: 700; }

/* ---------- 分类树 ---------- */
.tree { margin-bottom: 6px; }
.tree-sec {
  background: var(--card); border: 1px solid var(--line); border-radius: var(--radius-lg);
  box-shadow: var(--shadow); padding: 13px 14px; margin-bottom: 10px;
}
.tree-sec h3 { margin: 0 0 10px; font-size: 14.5px; }
.tree-chips { display: flex; flex-wrap: wrap; gap: 7px; }
.tree-chip {
  background: var(--chip-bg); border: 1px solid var(--line);
  border-radius: 999px; padding: 6px 12px; font-size: 12.5px; color: var(--ink);
}
.tree-chip .cnt { color: var(--ink-3); font-size: 11px; margin-left: 3px; }
.tree-chip.selected { background: var(--chip-on); color: var(--chip-on-ink); border-color: transparent; }
.tree-chip.selected .cnt { color: color-mix(in srgb, var(--chip-on-ink) 75%, transparent); }
.point-box { margin-top: 12px; display: flex; flex-wrap: wrap; gap: 7px; }
.point-box .point-chip { max-width: 100%; }
.point-box .cat-practice {
  border-color: var(--brand); color: var(--brand);
  background: var(--brand-soft); font-weight: 700; width: 100%; margin-bottom: 2px;
}

/* ---------- 结果列表 ---------- */
.results { margin-top: 4px; }
.result {
  background: var(--card); border: 1px solid var(--line); border-radius: var(--radius-lg);
  box-shadow: var(--shadow); padding: 13px 14px; margin-bottom: 9px; display: block; width: 100%; text-align: left;
}
.result .r-title { font-size: 15px; font-weight: 700; line-height: 1.45; }
.result .r-line { display: flex; align-items: center; gap: 7px; flex-wrap: wrap; margin-top: 6px; }
.result .r-sum { font-size: 13px; color: var(--ink-2); margin-top: 6px; line-height: 1.6; }
.result .r-empty { color: var(--ink-3); }
.badge {
  display: inline-block; font-size: 11px; font-weight: 700;
  padding: 2px 9px; border-radius: 999px;
  background: var(--chip-bg); color: var(--ink-2);
}
.badge.zt { background: var(--brand-soft); color: var(--brand); }
.badge.kd { background: var(--accent-soft); color: var(--accent); }
.badge.cl { background: var(--ok-soft); color: var(--ok); }
.tag-region { font-size: 12px; color: var(--brand); font-weight: 700; }
.tag-year { font-size: 12px; color: var(--ink-3); }
.tag-qid { font-size: 11px; color: var(--ink-3); font-variant-numeric: tabular-nums; }

/* ---------- 我的页 ---------- */
.stats { display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; text-align: center; }
.stat b { display: block; font-size: 22px; color: var(--brand); font-weight: 800; font-variant-numeric: tabular-nums; }
.stat span { font-size: 12px; color: var(--ink-2); }
.tabs-mini { display: flex; gap: 8px; margin: 4px 0 10px; padding: 0 14px; }
.minitab {
  flex: 1; background: var(--card); color: var(--ink-2);
  border: 1px solid var(--line2); border-radius: 12px; padding: 9px 0; font-size: 13px; font-weight: 600;
}
.minitab.active { background: var(--ink); color: var(--card); border-color: transparent; }
.plainlist { list-style: none; margin: 0 14px; padding: 0; }
.plainlist li {
  background: var(--card); border: 1px solid var(--line); border-radius: 14px;
  box-shadow: var(--shadow); padding: 12px 14px; margin-bottom: 8px; font-size: 14px; line-height: 1.5;
}
.plainlist li .sub { font-size: 12px; color: var(--ink-3); margin-top: 3px; }
.empty-tip { text-align: center; color: var(--ink-3); padding: 30px 0; font-size: 13px; }

/* ---------- 阅读浮层 ---------- */
#reader {
  position: fixed; inset: 0; z-index: 60; background: var(--bg);
  display: flex; flex-direction: column;
}
/* ---------- 阅读器头栏（方案 B：毛玻璃悬浮胶囊） ---------- */
#reader-head {
  display: flex; align-items: center; gap: 8px;
  position: absolute; z-index: 5;
  top: calc(env(safe-area-inset-top, 0px) + 8px);
  left: max(14px, env(safe-area-inset-left, 0px));
  right: max(14px, env(safe-area-inset-right, 0px));
  max-width: 720px; margin: 0 auto;
  padding: 6px 8px;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border); border-radius: 16px;
  backdrop-filter: blur(16px) saturate(1.3); -webkit-backdrop-filter: blur(16px) saturate(1.3);
  box-shadow: var(--glass-shadow);
}
.iconbtn {
  border: none; background: transparent; color: var(--ink-2);
  font-size: 21px; width: 36px; height: 36px; border-radius: 10px; line-height: 1;
}
.iconbtn:active { background: var(--chip-bg); }
#btn-reader-back {
  width: auto; padding: 0 10px; height: 36px; border-radius: 10px;
  font-size: 13px; font-weight: 600; white-space: nowrap;
  display: inline-flex; align-items: center;
  background: var(--chip-bg, rgba(0,0,0,.06));
}
#r-meta-line {
  font-size: 12px; color: var(--ink-2);
  min-width: 0; overflow: hidden; white-space: nowrap; text-overflow: ellipsis;
}
/* 刷题进度：悬浮玻璃小胶囊（仅练习模式显示） */
#r-progress-head {
  position: absolute; z-index: 5;
  top: calc(env(safe-area-inset-top, 0px) + 68px);
  left: max(16px, env(safe-area-inset-left, 0px));
  right: max(16px, env(safe-area-inset-right, 0px));
  max-width: 720px; margin: 0 auto;
  display: flex; align-items: center; gap: 10px;
  padding: 5px 12px;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border); border-radius: 999px;
  backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px);
  box-shadow: var(--glass-shadow);
}
.rbar { flex: 1; height: 4px; border-radius: 2px; background: var(--w0); overflow: hidden; }
.rbar i {
  display: block; height: 100%; width: 0%; border-radius: 2px;
  background: linear-gradient(90deg, var(--brand), color-mix(in srgb, var(--brand) 60%, #fff));
  transition: width .35s;
}
#r-progress-mini { font-size: 11px; color: var(--ink-3); font-variant-numeric: tabular-nums; flex: none; cursor: pointer; padding: 2px 4px; border-radius: 6px; }
#r-progress-mini:active { background: var(--chip-bg); }
#reader-scroll { flex: 1; overflow-y: auto; padding: 14px 16px calc(30px + var(--safe-b)); max-width: 720px; margin: 0 auto; width: 100%; }
#r-title { font-size: 19px; margin: 0 0 6px; line-height: 1.45; font-weight: 800; }
#r-point-line { font-size: 12px; color: var(--ink-3); margin-bottom: 14px; }
#r-body { line-height: 1.75; font-size: 15px; }
#r-body h2 { font-size: 16px; margin: 18px 0 8px; }
#r-body h3 { font-size: 15px; margin: 16px 0 6px; color: var(--ink); }
#r-body p { margin: 8px 0; }
#r-body ul, #r-body ol { margin: 8px 0; padding-left: 22px; }
#r-body li { margin: 5px 0; }
#r-body blockquote {
  margin: 10px 0; padding: 10px 14px; background: var(--chip-bg);
  border-left: 3px solid var(--accent); border-radius: 8px; color: var(--ink-2);
}
#r-body pre { overflow-x: auto; background: #101828; color: #e7ebf4; padding: 12px; border-radius: 10px; font-size: 13px; }
#r-body table { border-collapse: collapse; width: 100%; font-size: 13.5px; margin: 10px 0; }
#r-body th, #r-body td { border: 1px solid var(--line); padding: 7px 9px; text-align: left; }
#r-body th { background: var(--chip-bg); }
#r-body img { max-width: 100%; height: auto; border-radius: 10px; display: block; margin: 10px auto; }
#r-body a.kg-link { color: var(--brand-2); text-decoration: underline; text-underline-offset: 3px; }

/* ---------- 刷题区 ---------- */
.stem {
  background: var(--card); border: 1px solid var(--line); border-radius: var(--radius-lg);
  box-shadow: var(--shadow); padding: 17px; margin-bottom: 12px; font-size: 15px; line-height: 1.8;
}
.stem img { max-width: 100%; height: auto; display: block; margin: 10px auto; border-radius: 10px; }
.options { display: grid; grid-template-columns: 1fr; gap: 9px; margin-bottom: 14px; }
.option {
  background: var(--card); border: 1.5px solid var(--line2); border-radius: 14px;
  padding: 12px 14px; display: flex; gap: 11px; align-items: center; font-size: 14.5px; text-align: left; color: var(--ink);
}
.option .opt-k {
  flex: none; width: 27px; height: 27px; border-radius: 9px;
  background: var(--chip-bg); color: var(--ink-2);
  display: flex; align-items: center; justify-content: center; font-weight: 800; font-size: 13px;
  border: 1px solid var(--line);
}
.option .opt-t { flex: 1; line-height: 1.55; }
.option .option-imgs {
  display: flex; gap: 6px; flex-wrap: wrap;
  flex: 0 0 auto;
}
.option .option-imgs img {
  max-width: 100px; max-height: 80px; border-radius: 8px; display: block;
  object-fit: contain;
}
.option.correct { border-color: var(--ok); background: var(--ok-soft); }
.option.correct .opt-k { background: var(--ok); border-color: var(--ok); color: #fff; }
.option.wrong { border-color: var(--bad); background: var(--bad-soft); opacity: .85; }
.option.wrong .opt-k { background: var(--bad); border-color: var(--bad); color: #fff; }
.option.dim { opacity: .4; }
.option.selected { border-color: var(--brand); background: var(--brand-soft); box-shadow: 0 0 0 1px var(--brand) inset; }
.option.selected .opt-k { background: var(--brand); border-color: var(--brand); color: #fff; }
#r-control { margin-bottom: 14px; }
#r-actions { display: flex; gap: 10px; margin-top: 10px; }
#r-actions .ghost { flex: 1; }
#r-answer-banner {
  background: var(--ok-soft); border: 1px solid color-mix(in srgb, var(--ok) 35%, transparent); color: var(--ok-ink);
  border-radius: 14px; padding: 12px 14px; margin-bottom: 12px; font-size: 14px; font-weight: 700;
}
#r-answer-banner.warn {
  background: var(--accent-soft); border-color: var(--accent); color: var(--ink);
  font-size: 13px; font-weight: 600; line-height: 1.6;
}
#r-answer-banner.ok { background: var(--ok-soft); border-color: color-mix(in srgb, var(--ok) 40%, transparent); }
#r-answer-banner.bad { background: var(--bad-soft); border-color: color-mix(in srgb, var(--bad) 40%, transparent); }
.card-block {
  background: var(--card); border: 1px solid var(--line); border-radius: var(--radius-lg);
  box-shadow: var(--shadow); padding: 13px 15px; margin-bottom: 10px;
}
.card-block summary { font-weight: 800; font-size: 14px; color: var(--ink); cursor: pointer; }
.card-block[open] summary { margin-bottom: 8px; }
.card-block p, .card-block li, .card-block blockquote { font-size: 14px; }
.card-block img { max-width: 100%; height: auto; border-radius: 8px; }
#r-nav { display: flex; align-items: center; gap: 10px; margin-top: 16px; }
#r-nav .ghost { flex: 1; }
#r-progress { font-size: 12px; color: var(--ink-3); white-space: nowrap; font-variant-numeric: tabular-nums; }
#r-relations { margin-top: 18px; }
#r-relations h3 { font-size: 15px; margin: 0 0 8px; }
.rel-item { display: block; width: 100%; text-align: left; }
.rel-item .ctx { color: var(--ink-3); font-size: 12px; }
.multi-tip { font-size: 12px; color: var(--brand-2); text-align: center; margin-bottom: 10px; font-weight: 700; }
.undo-link { color: var(--brand-2); font-weight: 700; text-decoration: underline; text-underline-offset: 3px; font-size: 13px; }

/* ---------- 登录浮层 ---------- */
#boot {
  position: fixed; inset: 0; z-index: 55;
  background: var(--bg);
  display: flex; align-items: center; justify-content: center;
}
.boot-card {
  display: flex; flex-direction: column; align-items: center; gap: 10px;
  color: var(--ink);
}
.boot-title { font-size: 20px; font-weight: 700; margin-top: 14px; }
.boot-sub { font-size: 13px; opacity: .55; }
.boot-detail { font-size: 11px; opacity: .4; max-width: 78vw; text-align: center; word-break: break-all; line-height: 1.6; margin-top: 2px; }
.boot-spinner {
  width: 38px; height: 38px;
  border: 3px solid color-mix(in srgb, var(--brand, #6c5ce7) 20%, transparent);
  border-top-color: var(--brand, #6c5ce7);
  border-radius: 50%;
  animation: boot-spin .8s linear infinite;
}
@keyframes boot-spin { to { transform: rotate(360deg); } }
#boot-retry { margin-top: 12px; }

#login {
  position: fixed; inset: 0; z-index: 100; background: var(--bg);
  display: flex; align-items: center; justify-content: center; padding: 24px;
}
.login-card {
  width: 100%; max-width: 340px; background: var(--card);
  border: 1px solid var(--line); border-radius: 24px; box-shadow: var(--shadow-lg); padding: 32px 26px;
  text-align: center;
}
.login-icon { width: 64px; height: 64px; border-radius: 18px; }
.login-card h1 { font-size: 21px; margin: 14px 0 2px; }
.login-sub { color: var(--ink-3); font-size: 13px; margin: 0 0 22px; }
.login-card input {
  width: 100%; padding: 12px 14px; font-size: 15px; margin-bottom: 10px;
  border: 1.5px solid var(--line2); border-radius: 13px;
  background: var(--card); color: var(--ink);
}
.login-card input:focus { outline: 2px solid color-mix(in srgb, var(--brand) 35%, transparent); border-color: transparent; }
.login-err { color: var(--bad); font-size: 13px; margin: 4px 0 10px; text-align: left; }
.login-tip { color: var(--ink-3); font-size: 11px; margin: 16px 0 0; line-height: 1.6; }
.mt10 { margin-top: 12px; }

/* ---------- 设置区 ---------- */
.settings { border-top: 1px dashed var(--line2); padding-top: 10px; }
.set-row { display: flex; align-items: center; justify-content: space-between; gap: 10px; margin-bottom: 10px; }
.set-label { font-size: 13px; color: var(--ink-2); }
.set-row .chips { margin: 0; flex-wrap: wrap; justify-content: flex-end; }
.set-row .chip { padding: 6px 13px; border: 1px solid var(--line); }
.set-row .chip.active { border-color: transparent; }
.set-row input[type="checkbox"] { width: 20px; height: 20px; accent-color: var(--brand); }
.stats-sub { text-align: center; font-size: 12px; color: var(--ink-3); margin-top: 8px; }

/* ---------- 材料卡与考点讲解页 ---------- */
.material-box { border-left: 4px solid var(--brand); border-color: var(--line); border-left-color: var(--brand); }
.material-box summary { font-weight: 800; cursor: pointer; }
.material-box .card-block img { display: block; margin: 8px auto; }
.guide-meta { font-size: 13px; color: var(--ink-2); margin-bottom: 10px; }
.guide-h { font-size: 15px; margin: 16px 0 4px; }
.guide-same { margin-top: 8px; }
.guide-action {
  position: sticky; bottom: calc(var(--safe-b) + 8px);
  padding: 10px 0 4px; background: linear-gradient(transparent, var(--bg) 30%);
}

/* ---------- 题组完成战报卡（C 元素） ---------- */
.donecard {
  position: fixed; inset: 0; z-index: 90; background: rgba(11, 15, 26, .55);
  backdrop-filter: blur(6px); display: flex; align-items: center; justify-content: center; padding: 28px;
}
.donein {
  background: var(--card); border: 1px solid var(--line); border-radius: 26px;
  padding: 28px 22px; width: 100%; max-width: 330px; text-align: center;
  animation: dpop .25s; box-shadow: var(--shadow-lg);
}
@keyframes dpop { 0% { transform: scale(.92); opacity: .4; } 100% { transform: scale(1); opacity: 1; } }
.donein .tr { font-size: 48px; animation: dpop .35s; }
.donein h2 { font-size: 19px; margin-top: 6px; }
.donein .ds { font-size: 12px; color: var(--ink-2); margin-top: 6px; line-height: 1.7; }
.donein .ds b { color: var(--accent); }
.donein .dstat { display: flex; margin: 18px 0; background: var(--line); border-radius: 14px; padding: 12px 4px; }
.donein .dstat div { flex: 1; text-align: center; }
.donein .dstat b { display: block; font-size: 16px; color: var(--brand); font-variant-numeric: tabular-nums; }
.donein .dstat span { font-size: 10px; color: var(--ink-3); }
.donein .db1 {
  width: 100%; border: none; border-radius: 14px;
  background: linear-gradient(135deg, var(--brand), color-mix(in srgb, var(--brand) 55%, #fff));
  color: #fff; padding: 13px; font-size: 14px; font-weight: 800; cursor: pointer; font-family: inherit;
}
.donein .db2 {
  width: 100%; border: none; border-radius: 14px; background: var(--line);
  color: var(--ink-2); padding: 12px; margin-top: 8px; font-size: 13px; font-weight: 700; cursor: pointer; font-family: inherit;
}

/* ---------- 图片查看 ---------- */
#imgviewer {
  position: fixed; inset: 0; z-index: 80; background: rgba(8, 12, 22, .94);
  overflow: hidden; touch-action: none; user-select: none; -webkit-user-select: none;
}
#imgv-stage { position: absolute; inset: 0; display: flex; align-items: center; justify-content: center; }
#imgviewer img {
  max-width: none; max-height: none;
  border-radius: 8px; will-change: transform;
  touch-action: none;
}
.imgv-btn {
  position: absolute; z-index: 2; top: calc(env(safe-area-inset-top, 0px) + 14px);
  background: rgba(255, 255, 255, .14); color: #fff; border: 1px solid rgba(255, 255, 255, .25);
  border-radius: 999px; padding: 8px 14px; font-size: 14px;
}
#imgv-close { right: 14px; }
#imgv-tools { position: absolute; z-index: 2; left: 14px; top: calc(env(safe-area-inset-top, 0px) + 14px); display: flex; align-items: center; gap: 8px; }
.imgv-scale { color: #fff; font-size: 13px; font-variant-numeric: tabular-nums; background: rgba(255,255,255,.14); padding: 4px 10px; border-radius: 999px; }
.imgv-hint {
  position: absolute; z-index: 2; bottom: calc(env(safe-area-inset-bottom, 0px) + 14px);
  left: 50%; transform: translateX(-50%); width: max-content;
  color: rgba(255, 255, 255, .6); font-size: 11px;
}

/* ---------- 题量步进器（筛选区） ---------- */
.qty-stepper {
  display: flex; align-items: center; gap: 0;
  border: 1.5px solid var(--line2); border-radius: 11px;
  background: var(--card); overflow: hidden; width: 100%;
}
.qty-stepper button {
  flex: none; width: 38px; padding: 0; font-size: 18px; line-height: 1;
  background: var(--chip-bg); color: var(--ink-2); border: none;
  border-radius: 0; height: 40px;
}
.qty-stepper button:active { transform: none; background: var(--line); }
.qty-stepper input {
  flex: 1; min-width: 0; text-align: center;
  border: none; background: transparent; color: var(--ink);
  font-size: 14px; font-weight: 700; height: 40px; padding: 0 2px;
  font-variant-numeric: tabular-nums;
  -moz-appearance: textfield; appearance: textfield;
}
.qty-stepper input::-webkit-outer-spin-button,
.qty-stepper input::-webkit-inner-spin-button { -webkit-appearance: none; margin: 0; }
.qty-stepper input:focus { outline: none; }

/* ---------- 跳题面板（方案二） ---------- */
#jumppanel {
  position: fixed; inset: 0; z-index: 85;
}
#jp-mask {
  position: absolute; inset: 0; background: rgba(11, 15, 26, .45);
  backdrop-filter: blur(4px); -webkit-backdrop-filter: blur(4px);
}
.jp-sheet {
  position: absolute; left: 0; right: 0; bottom: 0;
  max-width: 720px; margin: 0 auto;
  background: var(--card); border: 1px solid var(--line);
  border-bottom: none; border-radius: 22px 22px 0 0;
  padding: 16px 16px calc(20px + var(--safe-b));
  box-shadow: var(--shadow-lg);
  animation: jpin .22s;
  max-height: 72vh; overflow-y: auto;
}
@keyframes jpin { 0% { transform: translateY(40px); opacity: .4; } 100% { transform: none; opacity: 1; } }
.jp-head {
  display: flex; align-items: center; justify-content: space-between;
  font-size: 16px; margin-bottom: 12px;
}
.jp-head .iconbtn { font-size: 18px; }
.jp-row { display: flex; gap: 10px; }
.jp-row input {
  flex: 1; min-width: 0; padding: 12px 14px; font-size: 16px;
  border-radius: 13px; border: 1.5px solid var(--line2);
  background: var(--bg); color: var(--ink);
  font-variant-numeric: tabular-nums;
}
.jp-row input:focus { outline: 2px solid color-mix(in srgb, var(--brand) 35%, transparent); border-color: transparent; }
.jp-row .primary { flex: none; width: auto; padding: 12px 20px; }
#jp-back-wrap { margin-top: 12px; }
#jp-back { background: var(--brand-soft); color: var(--brand); border: 1px solid color-mix(in srgb, var(--brand) 25%, transparent); }
.jp-group { margin-top: 16px; }
.jp-group-title { font-size: 12px; color: var(--ink-2); margin-bottom: 9px; }
.jp-chips { display: flex; flex-wrap: wrap; gap: 8px; }
.jp-chip {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 7px 11px; border-radius: 999px; font-size: 13px;
  background: var(--chip-bg); color: var(--ink-2); border: 1.5px solid transparent;
  font-variant-numeric: tabular-nums;
}
.jp-chip b {
  display: inline-flex; align-items: center; justify-content: center;
  width: 19px; height: 19px; border-radius: 999px;
  background: color-mix(in srgb, var(--ink-3) 22%, transparent);
  font-size: 11px; color: var(--ink-2); flex: none;
}
.jp-chip.ok { background: var(--ok-soft); color: var(--ok-ink); border-color: color-mix(in srgb, var(--ok) 35%, transparent); }
.jp-chip.ok b { background: var(--ok); color: #fff; }
.jp-chip.wrong { background: var(--bad-soft); color: var(--bad-ink); border-color: color-mix(in srgb, var(--bad) 35%, transparent); }
.jp-chip.wrong b { background: var(--bad); color: #fff; }
.jp-chip.cur { border-color: var(--brand); box-shadow: 0 0 0 1.5px var(--brand) inset; font-weight: 700; color: var(--ink); }
.jp-hint { font-size: 11px; color: var(--ink-3); margin-top: 14px; line-height: 1.6; }

/* ---------- Toast ---------- */
#toast {
  position: fixed; left: 50%; bottom: calc(90px + var(--safe-b)); transform: translateX(-50%);
  background: rgba(16, 24, 40, .92); color: #fff; font-size: 13px;
  padding: 10px 18px; border-radius: 999px; z-index: 95; white-space: nowrap;
}

/* ---------- 小屏适配 ---------- */
@media (max-width: 380px) {
  .mgrid { grid-template-columns: 1fr; }
  .filters { grid-template-columns: 1fr; }
  .filters label:last-child { grid-column: auto; }
}
/* ===== 主题级布局差异：知识库 = 高密度列表（方案 D 布局特征） ===== */
:root[data-theme="kb"] .mgrid {
  grid-template-columns: 1fr;
  gap: 7px;
}
:root[data-theme="kb"] .mcell {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 14px;
  border-radius: 12px;
  box-shadow: none;
}
:root[data-theme="kb"] .mcell::before {
  left: 0; top: 0; bottom: 0; right: auto;
  width: 4px; height: auto;
}
:root[data-theme="kb"] .mcell .num { display: none; }
:root[data-theme="kb"] .mcell b {
  flex: 1;
  margin-top: 0;
  font-size: 14px;
}
:root[data-theme="kb"] .mcell .cnt {
  margin-top: 0;
  font-size: 11px;
  text-align: right;
  color: var(--ink-3);
}
:root[data-theme="kb"] .mcell .stat { display: none; }
:root[data-theme="kb"] .mcell.total { padding: 13px 14px; }
:root[data-theme="kb"] .goalrow { box-shadow: none; }
/* 我的页统计：网格 → 单行分隔数字（方案 D 风格） */
:root[data-theme="kb"] .stats {
  grid-template-columns: repeat(3, 1fr);
  gap: 0;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--card);
  padding: 13px 0;
}
:root[data-theme="kb"] .stat + .stat { border-left: 1px solid var(--line); }

/* ================================================================
 * 四套主题独立布局（light 元气紫 / dark 夜间 / mag 杂志 / kb 知识库）
 * ================================================================ */
/* ---- 组件默认：只在对应主题下显示 ---- */
.growth, .achieve, .mine-graph { display: none; }

/* ---- 元气紫（light 显式 + auto@亮色）：成长卡 + 成就徽章 ---- */
.hh-text { display: block; }
:root[data-theme="light"] .hh-text { display: none; }
:root[data-theme="light"] .growth { display: block; }
:root[data-theme="light"] .achieve { display: block; }
@media (prefers-color-scheme: light){
  :root:not([data-theme="kb"]):not([data-theme="mag"]):not([data-theme="dark"]) .hh-text { display: none; }
  :root:not([data-theme="kb"]):not([data-theme="mag"]):not([data-theme="dark"]) .growth { display: block; }
  :root:not([data-theme="kb"]):not([data-theme="mag"]):not([data-theme="dark"]) .achieve { display: block; }
}

/* ---- 杂志（mag）：我的页图表 ---- */
:root[data-theme="mag"] .mine-graph { display: block; }

/* ---- 夜间（dark 显式 + auto@暗色）：做题页玻璃悬浮操作条 ---- */
:root[data-theme="dark"] #r-actions:not(.hidden) {
  position: fixed; left: 14px; right: 14px; bottom: calc(env(safe-area-inset-bottom, 0px) + 12px);
  display: flex; gap: 9px; padding: 8px; z-index: 6; margin-top: 0;
  background: rgba(18, 26, 43, .86); backdrop-filter: blur(16px);
  border: 1px solid var(--line2); border-radius: 18px;
  box-shadow: 0 12px 34px rgba(0, 0, 0, .45);
  animation: rbarin .18s;
}
@keyframes rbarin { 0% { opacity: 0; transform: translateY(8px); } 100% { opacity: 1; transform: none; } }
:root[data-theme="dark"] #r-actions:not(.hidden) .ghost {
  flex: 1; border: none; border-radius: 12px; padding: 12px 6px;
  background: var(--card); color: var(--ink-2); font-size: 13.5px;
}
:root[data-theme="dark"] #r-actions:not(.hidden) .ghost:active { transform: scale(.96); }
:root[data-theme="dark"] #reader-scroll { padding-bottom: calc(98px + var(--safe-b)); }
@media (prefers-color-scheme: dark){
  :root:not([data-theme="kb"]):not([data-theme="mag"]):not([data-theme="light"]) #r-actions:not(.hidden) {
    position: fixed; left: 14px; right: 14px; bottom: calc(env(safe-area-inset-bottom, 0px) + 12px);
    display: flex; gap: 9px; padding: 8px; z-index: 6; margin-top: 0;
    background: rgba(18, 26, 43, .86); backdrop-filter: blur(16px);
    border: 1px solid var(--line2); border-radius: 18px;
    box-shadow: 0 12px 34px rgba(0, 0, 0, .45);
    animation: rbarin .18s;
  }
  :root:not([data-theme="kb"]):not([data-theme="mag"]):not([data-theme="light"]) #r-actions:not(.hidden) .ghost {
    flex: 1; border: none; border-radius: 12px; padding: 12px 6px;
    background: var(--card); color: var(--ink-2); font-size: 13.5px;
  }
  :root:not([data-theme="kb"]):not([data-theme="mag"]):not([data-theme="light"]) #reader-scroll { padding-bottom: calc(98px + var(--safe-b)); }
}

/* ---- 成长卡（元气紫） ---- */
.growth {
  background: linear-gradient(135deg, #6d5ce8, #8b5cf6 45%, #a855f7);
  border-radius: 22px; padding: 15px 16px 13px; color: #fff; position: relative;
  overflow: hidden; box-shadow: 0 12px 30px rgba(124, 92, 240, .32);
  margin-top: 12px;
}
.growth::after {
  content: ""; position: absolute; right: -36px; top: -36px;
  width: 140px; height: 140px; border-radius: 50%; background: rgba(255,255,255,.12);
}
.growth .g-row { display: flex; align-items: center; gap: 10px; position: relative; z-index: 1; }
.growth .g-ava {
  width: 40px; height: 40px; border-radius: 13px; flex: none;
  background: rgba(255,255,255,.2); border: 1.5px solid rgba(255,255,255,.4);
  display: flex; align-items: center; justify-content: center; font-size: 20px;
}
.growth .g-who { flex: 1; min-width: 0; }
.growth .g-who b { font-size: 15px; display: block; }
.growth .g-who span { font-size: 10.5px; opacity: .88; display: block; margin-top: 1px; }
.growth .g-lv {
  font-size: 11px; font-weight: 800; flex: none;
  background: rgba(255,255,255,.2); border: 1px solid rgba(255,255,255,.35);
  border-radius: 999px; padding: 4px 11px;
}
.growth .g-xp { display: flex; align-items: center; gap: 8px; margin-top: 11px; position: relative; z-index: 1; }
.growth .g-xp .t { font-size: 10px; opacity: .85; flex: none; }
.growth .g-xpbar { flex: 1; height: 7px; border-radius: 5px; background: rgba(0,0,0,.25); overflow: hidden; }
.growth .g-xpbar i {
  display: block; height: 100%; border-radius: 5px;
  background: linear-gradient(90deg, #fde68a, #f59e0b); box-shadow: 0 0 10px rgba(251,191,36,.6);
}
.growth .g-xp .n { font-size: 10.5px; font-weight: 800; font-variant-numeric: tabular-nums; flex: none; }

/* ---- 成就徽章（元气紫·我的页） ---- */
.achieve { margin: 2px 0 10px; display: flex; gap: 8px; overflow-x: auto; padding-bottom: 2px; scrollbar-width: none; }
.achieve::-webkit-scrollbar { display: none; }
.achieve .bdg {
  flex: none; min-width: 92px; background: var(--card); border: 1px solid var(--line);
  border-radius: 14px; padding: 10px 11px; text-align: center; box-shadow: var(--shadow);
}
.achieve .bdg .bic { font-size: 22px; filter: drop-shadow(0 3px 6px rgba(124,92,240,.25)); }
.achieve .bdg b { display: block; font-size: 11.5px; margin-top: 3px; }
.achieve .bdg span { display: block; font-size: 9.5px; color: var(--ink-3); margin-top: 2px; }

/* ---- 杂志图表（我的页）：环形 + 近 7 日热力 ---- */
.mine-graph { margin-top: 12px; padding-top: 12px; border-top: 1px dashed var(--line2); }
.mg-row { display: flex; align-items: center; gap: 14px; }
.mg-ring { position: relative; flex: none; width: 64px; height: 64px; }
.mg-ring svg { transform: rotate(-90deg); }
.mg-ring .mg-t { stroke: var(--line); }
.mg-ring .mg-v { stroke: var(--brand); transition: stroke-dashoffset .6s; }
.mg-rm { position: absolute; inset: 0; display: flex; align-items: center; justify-content: center; font-weight: 800; font-size: 15px; font-variant-numeric: tabular-nums; }
.mg-rm small { font-size: 9px; color: var(--ink-3); font-weight: 600; margin-left: 1px; }
.mg-info { flex: 1; }
.mg-info b { font-size: 14px; }
.mg-info p { font-size: 11px; color: var(--ink-3); margin-top: 4px; line-height: 1.6; }
.mg-heat { display: flex; gap: 5px; align-items: flex-end; height: 74px; margin-top: 13px; }
.mg-day { flex: 1; display: flex; flex-direction: column; align-items: center; height: 100%; }
.mg-bar { flex: 1; width: 100%; border-radius: 6px; background: var(--line); display: flex; align-items: flex-end; justify-content: center; overflow: hidden; }
.mg-bar i { display: block; width: 100%; border-radius: 6px 6px 0 0; }
.mg-bar i.l1 { background: var(--w3); height: 30%; }
.mg-bar i.l2 { background: var(--brand-2); height: 55%; }
.mg-bar i.l3 { background: var(--brand); height: 80%; }
.mg-bar i.l4 { background: color-mix(in srgb, var(--brand) 40%, var(--accent)); height: 100%; }
.mg-day span { font-size: 9px; color: var(--ink-3); margin-top: 4px; }

/* ---------- 列表总数提示 ---------- */
.list-total {
  text-align: center; font-size: 11px; color: var(--ink-3);
  padding: 10px 0 4px !important; background: none !important;
  border: none !important; box-shadow: none !important;
  font-variant-numeric: tabular-nums;
}

/* ---------- 列表分页：加载更多 ---------- */
.more-li {
  text-align: center; background: none !important; border: none !important;
  box-shadow: none !important; padding: 8px 0 2px !important;
}
.btn-mini-more {
  border: 1px solid var(--line2); background: var(--card); color: var(--ink-2);
  border-radius: 999px; padding: 10px 20px; font-size: 12.5px; font-weight: 600;
}
.btn-mini-more:active { transform: scale(.96); }

/* ================================================================
 * 刘海屏 / 灵动岛 / 打孔屏 安全区适配
 * ----------------------------------------------------------------
 * 1) 独立 App（PWA 安装 / TWA / Capacitor，index.html 内联脚本标记 data-standalone）：
 *    - body::before 画一条「状态条色带」盖住顶部安全区，保证白色状态栏文字
 *      在浅色主题下也清晰可读；
 *    - 页面 / 离线横幅顶部内容下移，避开刘海与状态栏。
 * 2) 左右安全区（横屏刘海 / 圆角 / iPad 灵动帽）：任何模式都保留最小边距。
 * ================================================================ */

/* 状态条色带配色：浅色主题用品牌深色渐变；暗色主题用自身背景即可 */
:root { --status-bg: var(--brand-grad); }
:root[data-theme="dark"] { --status-bg: var(--bg); }
:root[data-theme="kb"]   { --status-bg: linear-gradient(135deg, #1d2129, #3a4150); }
:root[data-theme="mag"]  { --status-bg: linear-gradient(135deg, #3a4ab8, #4f63d2); }
@media (prefers-color-scheme: dark){
  :root:not([data-theme="light"]):not([data-theme="kb"]):not([data-theme="mag"]) { --status-bg: var(--bg); }
}

/* 独立 App 模式：顶部状态条色带（高度 = 顶部安全区，普通设备为 0 自动隐藏） */
:root[data-standalone] body::before {
  content: "";
  position: fixed; top: 0; left: 0; right: 0;
  height: env(safe-area-inset-top, 0px);
  background: var(--status-bg);
  z-index: 120; pointer-events: none;
}

/* 顶部内容避开状态栏 / 刘海（仅独立 App 模式） */
:root[data-standalone] .tabpage {
  padding-top: calc(env(safe-area-inset-top, 0px) + 12px);
}
:root[data-standalone] #offline-banner {
  padding-top: calc(env(safe-area-inset-top, 0px) + 5px);
}

/* 左右安全区（横屏刘海 / 圆角）：无刘海设备上恒为 0，不影响纵向布局 */
.tabpage {
  padding-left:  max(14px, env(safe-area-inset-left, 0px));
  padding-right: max(14px, env(safe-area-inset-right, 0px));
}
#reader-scroll {
  padding-left:  max(16px, env(safe-area-inset-left, 0px));
  padding-right: max(16px, env(safe-area-inset-right, 0px));
}
#tabbar {
  padding-left:  env(safe-area-inset-left, 0px);
  padding-right: env(safe-area-inset-right, 0px);
}
#imgv-close  { right: max(14px, env(safe-area-inset-right, 0px)); }
#imgv-tools  { left:  max(14px, env(safe-area-inset-left, 0px)); }


/* ================================================================
 * 方案 B：毛玻璃悬浮胶囊 —— 玻璃变量（四主题自适应）
 * 阅读器顶部胶囊 + 刷题进度胶囊：半透明磨砂、随内容滚动透出
 * ================================================================ */
:root { --glass-bg: color-mix(in srgb, var(--card) 82%, transparent); --glass-border: var(--line2); --glass-shadow: var(--shadow); }
:root[data-theme="dark"] { --glass-bg: rgba(18, 26, 43, .74); --glass-border: rgba(148, 168, 210, .22); }
:root[data-theme="kb"]    { --glass-bg: rgba(255, 255, 255, .94); --glass-border: var(--line); --glass-shadow: none; }
:root[data-theme="mag"]   { --glass-bg: rgba(255, 255, 255, .86); --glass-border: var(--line2); }
@media (prefers-color-scheme: dark){
  :root:not([data-theme="light"]):not([data-theme="kb"]):not([data-theme="mag"]) {
    --glass-bg: rgba(18, 26, 43, .74); --glass-border: rgba(148, 168, 210, .22);
  }
}

/* 悬浮层下方内容起始高度：练习模式多一颗进度胶囊，内容再下移，避免被胶囊遮挡 */
#reader-scroll { padding-top: calc(env(safe-area-inset-top, 0px) + 64px); }
#reader:has(#r-progress-head:not(.hidden)) #reader-scroll { padding-top: calc(env(safe-area-inset-top, 0px) + 112px); }