/* ===== 《聪明理财》电子书阅读器样式 ===== */
:root {
  --bg: #faf8f4;
  --bg-elev: #ffffff;
  --bg-sidebar: #f3efe7;
  --text: #2b2b29;
  --text-soft: #5f5d57;
  --text-faint: #908d85;
  --border: #e6e0d4;
  --border-soft: #efeae0;
  --accent: #1f6f5c;          /* 墨绿主色 */
  --accent-soft: #e4f0ec;
  --accent-2: #b5803a;        /* 暖金次色 */
  --code-bg: #f1ede4;
  --code-text: #985f2e;
  --shadow: 0 1px 3px rgba(40,30,10,.06), 0 8px 30px rgba(40,30,10,.06);
  --maxw: 720px;
  --sidebar-w: 300px;
  --serif: "Noto Serif SC", "Songti SC", Georgia, "Times New Roman", serif;
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
          "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans CJK SC", sans-serif;
}
body[data-theme="dark"] {
  --bg: #16181c;
  --bg-elev: #1e2127;
  --bg-sidebar: #1a1c21;
  --text: #dfe2e6;
  --text-soft: #aab0b8;
  --text-faint: #767c85;
  --border: #2e323a;
  --border-soft: #262a31;
  --accent: #4fae93;
  --accent-soft: #1d2a27;
  --accent-2: #d2a25f;
  --code-bg: #262a31;
  --code-text: #e0a86a;
  --shadow: 0 1px 3px rgba(0,0,0,.3), 0 10px 30px rgba(0,0,0,.35);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--sans);
  background: var(--bg);
  color: var(--text);
  line-height: 1.85;
  font-size: 17px;
  -webkit-text-size-adjust: 100%;
  transition: background .3s, color .3s;
}

/* ---------- 进度条 ---------- */
.progress-bar {
  position: fixed; top: 0; left: 0; right: 0; height: 3px;
  background: transparent; z-index: 60;
}
.progress-fill {
  height: 100%; width: 0;
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  transition: width .1s linear;
}

/* ---------- 顶栏 ---------- */
.topbar {
  position: sticky; top: 0; z-index: 50;
  display: flex; align-items: center; gap: 12px;
  height: 52px; padding: 0 16px;
  background: color-mix(in srgb, var(--bg-elev) 88%, transparent);
  backdrop-filter: saturate(160%) blur(10px);
  border-bottom: 1px solid var(--border-soft);
}
.topbar-title {
  font-weight: 700; color: var(--text); text-decoration: none;
  font-size: 16px; letter-spacing: .3px; flex: 1;
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}
.topbar-sub { color: var(--text-faint); font-weight: 400; font-size: 13px; }
.icon-btn {
  border: none; background: transparent; cursor: pointer;
  font-size: 19px; color: var(--text-soft); width: 38px; height: 38px;
  border-radius: 10px; display: grid; place-items: center;
  transition: background .2s;
}
.icon-btn:hover { background: var(--accent-soft); }
.menu-btn { display: none; }

/* ---------- 布局 ---------- */
.layout { display: flex; align-items: flex-start; }

/* ---------- 侧边栏 ---------- */
.sidebar {
  position: sticky; top: 52px; flex: 0 0 var(--sidebar-w);
  width: var(--sidebar-w); height: calc(100vh - 52px);
  overflow-y: auto; background: var(--bg-sidebar);
  border-right: 1px solid var(--border-soft);
  padding: 8px 0 40px;
}
.sidebar-brand { display: block; padding: 18px 22px 14px; text-decoration: none; }
.brand-title { font-size: 20px; font-weight: 800; color: var(--text); letter-spacing: 1px; }
.brand-sub { font-size: 12.5px; color: var(--text-faint); margin-top: 3px; }
.toc { padding: 4px 12px; }
.toc-group { margin-bottom: 14px; }
.toc-part {
  font-size: 12px; font-weight: 700; color: var(--accent);
  letter-spacing: .5px; padding: 8px 10px 5px; text-transform: none;
}
.toc-link {
  display: flex; align-items: flex-start; gap: 9px;
  padding: 7px 10px; margin: 1px 0; border-radius: 9px;
  text-decoration: none; color: var(--text-soft);
  font-size: 14.5px; line-height: 1.45; transition: background .15s, color .15s;
}
.toc-link:hover { background: var(--accent-soft); color: var(--text); }
.toc-link.active { background: var(--accent); color: #fff; }
.toc-link.active .toc-num { background: rgba(255,255,255,.22); color: #fff; }
.toc-num {
  flex: 0 0 auto; min-width: 22px; height: 22px; padding: 0 5px;
  border-radius: 7px; background: var(--border-soft); color: var(--text-faint);
  font-size: 12px; font-weight: 700; display: grid; place-items: center;
  margin-top: 1px;
}
.toc-text { flex: 1; }

.overlay {
  display: none; position: fixed; inset: 52px 0 0 0; z-index: 39;
  background: rgba(20,15,5,.4);
}

/* ---------- 正文 ---------- */
.content-wrap { flex: 1 1 auto; min-width: 0; display: flex; flex-direction: column;
  align-items: center; padding: 0 24px; }
.content {
  width: 100%; max-width: var(--maxw); padding: 38px 0 12px;
}
.chapter-label {
  display: inline-block; font-size: 13px; font-weight: 700;
  color: var(--accent-2); letter-spacing: 2px; margin-bottom: 8px;
}
.chapter-title {
  font-family: var(--serif);
  font-size: 30px; line-height: 1.35; font-weight: 800;
  margin: 0 0 28px; letter-spacing: .5px; color: var(--text);
}
.content h2 {
  font-family: var(--serif);
  font-size: 22px; font-weight: 700; line-height: 1.4;
  margin: 42px 0 14px; padding-top: 6px; color: var(--text);
  scroll-margin-top: 64px;
}
.content h2::before {
  content: ""; display: block; width: 34px; height: 3px;
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  border-radius: 3px; margin-bottom: 12px;
}
.content h3 {
  font-size: 18px; font-weight: 700; margin: 28px 0 10px; color: var(--text);
  scroll-margin-top: 64px;
}
.content p { margin: 0 0 16px; }
.content strong { font-weight: 700; color: var(--text); }
.content a { color: var(--accent); text-decoration: none; border-bottom: 1px solid var(--accent-soft); }
.content a:hover { border-bottom-color: var(--accent); }
.content ul, .content ol { margin: 0 0 16px; padding-left: 26px; }
.content li { margin: 6px 0; }
.content li::marker { color: var(--accent); }
.content hr { border: none; border-top: 1px solid var(--border); margin: 32px 0; }

/* 行内代码 / 公式 */
.content code {
  font-family: "SF Mono", "JetBrains Mono", Consolas, Menlo, monospace;
  background: var(--code-bg); color: var(--code-text);
  padding: 2px 7px; border-radius: 6px; font-size: .9em;
  word-break: break-word;
}
.content pre {
  background: var(--code-bg); border: 1px solid var(--border-soft);
  border-radius: 10px; padding: 14px 16px; overflow-x: auto; margin: 0 0 18px;
}
.content pre code { background: none; padding: 0; color: var(--text); }

/* 表格 */
.content .table-wrap, .content > table { margin: 0 0 20px; }
.content table {
  width: 100%; border-collapse: collapse; font-size: 14.5px;
  background: var(--bg-elev); border-radius: 10px; overflow: hidden;
  box-shadow: var(--shadow);
}
.content th, .content td {
  padding: 9px 13px; text-align: left; border-bottom: 1px solid var(--border-soft);
  vertical-align: top;
}
.content thead th {
  background: var(--accent); color: #fff; font-weight: 700;
  white-space: nowrap; border-bottom: none;
}
.content tbody tr:nth-child(even) { background: color-mix(in srgb, var(--accent-soft) 40%, transparent); }
.content tbody tr:last-child td { border-bottom: none; }

/* 普通引用（非 callout） */
.content blockquote {
  margin: 0 0 18px; padding: 4px 18px; border-left: 3px solid var(--accent-2);
  color: var(--text-soft); background: var(--border-soft); border-radius: 0 8px 8px 0;
}
.content blockquote p:last-child { margin-bottom: 0; }

/* ---------- callout 信息框 ---------- */
.callout {
  margin: 0 0 20px; border-radius: 12px; padding: 14px 18px;
  background: var(--bg-elev); border: 1px solid var(--border);
  border-left: 4px solid var(--cl, var(--accent));
  box-shadow: var(--shadow);
}
.callout-head { display: flex; align-items: center; gap: 8px; margin-bottom: 8px; }
.callout-icon { font-size: 17px; line-height: 1; }
.callout-title { font-weight: 700; color: var(--cl, var(--accent)); font-size: 15px; }
.callout-body > :first-child { margin-top: 0; }
.callout-body > :last-child { margin-bottom: 0; }
.callout-body { font-size: 15.5px; }
.callout-body table { font-size: 14px; box-shadow: none; }
.callout-note     { --cl: #2f6fb0; }
.callout-tip      { --cl: #1f8a5c; }
.callout-example  { --cl: #7a59c2; }
.callout-warning  { --cl: #c4612a; }
.callout-important { --cl: #c23b4b; }
.callout-quote    { --cl: var(--text-faint); }
.callout-pitfall  { --cl: #b0892a; }
.callout-try      { --cl: #2f8f8a; }
.callout-important { background: color-mix(in srgb, #c23b4b 7%, var(--bg-elev)); }
.callout-warning  { background: color-mix(in srgb, #c4612a 6%, var(--bg-elev)); }

/* ---------- 章间导航 ---------- */
.chapter-nav {
  width: 100%; max-width: var(--maxw); display: flex; gap: 14px;
  margin: 30px 0 8px; padding-top: 26px; border-top: 1px solid var(--border);
}
.navlink {
  flex: 1; display: flex; flex-direction: column; gap: 4px;
  padding: 14px 16px; border-radius: 12px; text-decoration: none;
  background: var(--bg-elev); border: 1px solid var(--border);
  transition: transform .15s, border-color .15s, box-shadow .15s;
}
.navlink:hover { transform: translateY(-2px); border-color: var(--accent); box-shadow: var(--shadow); }
.navlink.next { text-align: right; }
.navlink.disabled { background: transparent; border: none; pointer-events: none; }
.navdir { font-size: 12.5px; color: var(--accent); font-weight: 700; }
.navtitle { font-size: 15px; color: var(--text); font-weight: 600; }

/* ---------- 页脚 ---------- */
.page-footer {
  width: 100%; max-width: var(--maxw); margin: 24px 0 60px;
  padding-top: 20px; border-top: 1px dashed var(--border);
}
.disclaimer { font-size: 12.5px; color: var(--text-faint); line-height: 1.7; margin: 0 0 8px; }
.copyright { font-size: 12px; color: var(--text-faint); margin: 0; }

/* ---------- 本章小节目录（右侧浮动） ---------- */
.chapter-toc {
  position: sticky; top: 72px; flex: 0 0 200px; width: 200px;
  max-height: calc(100vh - 100px); overflow-y: auto;
  padding: 8px 16px 8px 0; margin-top: 38px; font-size: 13px;
}
.chapter-toc .ct-title { font-weight: 700; color: var(--text-faint); font-size: 12px;
  letter-spacing: 1px; margin-bottom: 8px; }
.chapter-toc a {
  display: block; padding: 4px 10px; color: var(--text-faint);
  text-decoration: none; border-left: 2px solid var(--border-soft);
  line-height: 1.45; transition: color .15s, border-color .15s;
}
.chapter-toc a.lvl-3 { padding-left: 22px; font-size: 12.5px; }
.chapter-toc a:hover { color: var(--text); }
.chapter-toc a.active { color: var(--accent); border-left-color: var(--accent); font-weight: 600; }

/* ---------- 回到顶部 ---------- */
.totop {
  position: fixed; right: 22px; bottom: 26px; z-index: 45;
  width: 44px; height: 44px; border-radius: 50%; border: 1px solid var(--border);
  background: var(--bg-elev); color: var(--accent); font-size: 20px; cursor: pointer;
  box-shadow: var(--shadow); opacity: 0; pointer-events: none;
  transition: opacity .25s, transform .25s;
}
.totop.show { opacity: 1; pointer-events: auto; }
.totop:hover { transform: translateY(-3px); }

/* ===================== 封面 ===================== */
.cover-page { background: var(--bg); }
.cover { max-width: 860px; margin: 0 auto; padding: 0 22px 80px; }
.hero { text-align: center; padding: 64px 0 44px; }
.hero-badge {
  display: inline-block; padding: 5px 14px; border-radius: 999px;
  background: var(--accent-soft); color: var(--accent); font-size: 13px;
  font-weight: 700; letter-spacing: .5px; margin-bottom: 22px;
}
.hero-title {
  font-family: var(--serif); font-size: 56px; font-weight: 800;
  letter-spacing: 4px; margin: 0; color: var(--text); line-height: 1.1;
}
.hero-sub { font-size: 21px; color: var(--accent); font-weight: 600; margin: 14px 0 6px; letter-spacing: 1px; }
.hero-tagline { font-size: 15px; color: var(--text-soft); margin: 0 0 26px; }
.hero-meta {
  display: flex; flex-wrap: wrap; gap: 10px 22px; justify-content: center;
  font-size: 13.5px; color: var(--text-faint); margin-bottom: 30px;
}
.cta {
  display: inline-block; padding: 13px 40px; border-radius: 999px;
  background: linear-gradient(120deg, var(--accent), #2c8a73);
  color: #fff; text-decoration: none; font-weight: 700; font-size: 16px;
  letter-spacing: 1px; box-shadow: 0 8px 24px rgba(31,111,92,.32);
  transition: transform .18s, box-shadow .18s;
}
.cta:hover { transform: translateY(-2px); box-shadow: 0 12px 30px rgba(31,111,92,.4); }
.cta-row { display: flex; flex-wrap: wrap; gap: 14px; justify-content: center; }
.cta-ghost {
  background: transparent; color: var(--accent);
  border: 1.5px solid var(--accent); box-shadow: none;
}
.cta-ghost:hover { background: var(--accent-soft); box-shadow: none; }
.cover-disclaimer { max-width: 720px; margin: 0 auto 46px; }
.cover-toc { max-width: 760px; margin: 0 auto; }
.cover-toc-title {
  font-family: var(--serif); font-size: 26px; text-align: center;
  margin: 0 0 26px; color: var(--text);
}
.cv-group { margin-bottom: 26px; }
.cv-part { font-size: 14px; color: var(--accent); font-weight: 700; letter-spacing: .5px;
  margin: 0 0 10px; padding-bottom: 6px; border-bottom: 1px solid var(--border-soft); }
.cv-link {
  display: flex; align-items: baseline; gap: 12px; padding: 9px 12px;
  border-radius: 10px; text-decoration: none; color: var(--text-soft);
  transition: background .15s, color .15s;
}
.cv-link:hover { background: var(--accent-soft); color: var(--text); }
.cv-num {
  flex: 0 0 auto; min-width: 26px; text-align: center; font-weight: 700;
  font-size: 13px; color: var(--accent-2);
}
.cv-title { font-size: 15.5px; }
.cover-footer { text-align: center; margin-top: 50px; font-size: 12.5px; color: var(--text-faint); }

/* ===================== 自测 / 考试 ===================== */
.quiz {
  width: 100%; max-width: var(--maxw); margin: 26px 0 6px;
}
.quiz-banner {
  display: flex; align-items: center; gap: 12px;
  padding: 16px 18px; border-radius: 14px; margin-bottom: 18px;
  background: linear-gradient(120deg, var(--accent-soft), color-mix(in srgb, var(--accent-2) 14%, var(--bg-elev)));
  border: 1px solid var(--border);
}
.quiz-banner .qb-icon { font-size: 26px; line-height: 1; }
.quiz-banner .qb-text { flex: 1; }
.quiz-banner .qb-title { font-weight: 800; font-size: 17px; color: var(--text); font-family: var(--serif); }
.quiz-banner .qb-sub { font-size: 13px; color: var(--text-soft); margin-top: 2px; }
.quiz-card {
  background: var(--bg-elev); border: 1px solid var(--border);
  border-radius: 14px; padding: 18px 20px; margin: 0 0 16px; box-shadow: var(--shadow);
}
.quiz-card .q-tag {
  display: inline-block; font-size: 11.5px; font-weight: 700; letter-spacing: .5px;
  padding: 2px 9px; border-radius: 999px; margin-bottom: 10px;
  background: var(--accent-soft); color: var(--accent);
}
.quiz-card .q-tag.open { background: color-mix(in srgb, var(--accent-2) 18%, var(--bg-elev)); color: var(--accent-2); }
.quiz-card .q-tag .q-src { color: var(--text-faint); font-weight: 600; }
.q-text { font-weight: 600; font-size: 16.5px; line-height: 1.7; margin: 0 0 14px; color: var(--text); }
.q-opts { display: flex; flex-direction: column; gap: 9px; }
.opt {
  display: flex; align-items: flex-start; gap: 11px; cursor: pointer;
  padding: 11px 14px; border-radius: 11px; border: 1.5px solid var(--border);
  background: var(--bg); transition: border-color .15s, background .15s;
}
.opt:hover { border-color: var(--accent); }
.opt .opt-key {
  flex: 0 0 auto; width: 24px; height: 24px; border-radius: 7px;
  display: grid; place-items: center; font-weight: 700; font-size: 13px;
  background: var(--border-soft); color: var(--text-soft);
}
.opt .opt-text { flex: 1; line-height: 1.55; font-size: 15.5px; }
.opt.selected { border-color: var(--accent); background: var(--accent-soft); }
.opt.selected .opt-key { background: var(--accent); color: #fff; }
.quiz-card.graded .opt { cursor: default; pointer-events: none; }
.opt.correct { border-color: #1f8a5c; background: color-mix(in srgb, #1f8a5c 12%, var(--bg-elev)); }
.opt.correct .opt-key { background: #1f8a5c; color: #fff; }
.opt.wrong { border-color: #c23b4b; background: color-mix(in srgb, #c23b4b 10%, var(--bg-elev)); }
.opt.wrong .opt-key { background: #c23b4b; color: #fff; }
.opt .opt-mark { margin-left: auto; font-weight: 700; font-size: 14px; }
.q-explain, .q-reference {
  margin-top: 13px; padding: 12px 15px; border-radius: 10px; font-size: 14.5px;
  line-height: 1.7; background: var(--code-bg); border-left: 3px solid var(--accent);
  color: var(--text-soft); display: none;
}
.q-explain.show, .q-reference.show { display: block; }
.q-explain b, .q-reference b { color: var(--text); }
.q-answer-box { margin-top: 4px; }
.q-answer-box textarea {
  width: 100%; min-height: 96px; resize: vertical; padding: 12px 14px;
  border-radius: 11px; border: 1.5px solid var(--border); background: var(--bg);
  color: var(--text); font-family: var(--sans); font-size: 15.5px; line-height: 1.7;
}
.q-answer-box textarea:focus { outline: none; border-color: var(--accent); }
.q-actions { display: flex; flex-wrap: wrap; gap: 10px; align-items: center; margin-top: 12px; }
.btn {
  border: none; cursor: pointer; font-family: var(--sans); font-weight: 700;
  font-size: 14.5px; padding: 9px 20px; border-radius: 999px; transition: transform .15s, box-shadow .15s, opacity .15s;
}
.btn-primary { background: linear-gradient(120deg, var(--accent), #2c8a73); color: #fff; box-shadow: 0 6px 16px rgba(31,111,92,.28); }
.btn-primary:hover { transform: translateY(-1px); }
.btn-primary:disabled { opacity: .55; cursor: default; transform: none; }
.btn-ghost { background: transparent; color: var(--accent); border: 1.5px solid var(--border); }
.btn-ghost:hover { border-color: var(--accent); }
.grade-result { margin-top: 14px; border-radius: 12px; border: 1px solid var(--border); overflow: hidden; display: none; }
.grade-result.show { display: block; }
.grade-top { display: flex; align-items: center; gap: 14px; padding: 13px 16px; background: var(--accent-soft); }
.grade-score { font-family: var(--serif); font-weight: 800; font-size: 26px; color: var(--accent); line-height: 1; }
.grade-score small { font-size: 14px; color: var(--text-faint); font-weight: 600; }
.grade-verdict { font-weight: 700; font-size: 15px; color: var(--text); }
.grade-verdict .gv-pill { font-size: 12px; padding: 2px 10px; border-radius: 999px; background: var(--accent); color: #fff; margin-left: 6px; }
.grade-body { padding: 13px 16px; font-size: 14.5px; line-height: 1.75; }
.grade-body .gb-fb { color: var(--text); margin-bottom: 10px; }
.grade-body ul { margin: 4px 0 10px; padding-left: 20px; }
.grade-body .gb-hit li::marker { color: #1f8a5c; }
.grade-body .gb-miss li::marker { color: #c4612a; }
.grade-body .gb-label { font-size: 12.5px; font-weight: 700; color: var(--text-faint); letter-spacing: .5px; }
.grade-loading { display: inline-flex; align-items: center; gap: 8px; color: var(--text-soft); font-size: 14px; }
.grade-loading .dot { width: 7px; height: 7px; border-radius: 50%; background: var(--accent); animation: qpulse 1s infinite ease-in-out; }
.grade-loading .dot:nth-child(2){ animation-delay: .15s; } .grade-loading .dot:nth-child(3){ animation-delay: .3s; }
@keyframes qpulse { 0%,100%{ opacity:.3; transform: scale(.8);} 50%{ opacity:1; transform: scale(1);} }
.quiz-summary {
  margin: 4px 0 18px; padding: 16px 20px; border-radius: 14px; text-align: center;
  background: var(--bg-elev); border: 1px solid var(--border); box-shadow: var(--shadow); display: none;
}
.quiz-summary.show { display: block; }
.quiz-summary .qs-score { font-family: var(--serif); font-size: 32px; font-weight: 800; color: var(--accent); }
.quiz-summary .qs-sub { font-size: 14px; color: var(--text-soft); margin-top: 4px; }
.quiz-note { font-size: 12.5px; color: var(--text-faint); line-height: 1.7; margin: 14px 0 0; }

/* 考试中心页面入口（侧栏 / 封面） */
.toc-link.exam-link { color: var(--accent-2); font-weight: 700; }
.toc-link.exam-link .toc-num { background: color-mix(in srgb, var(--accent-2) 22%, transparent); color: var(--accent-2); }
.toc-link.exam-link.active { background: var(--accent-2); color: #fff; }
.toc-link.exam-link.active .toc-num { background: rgba(255,255,255,.25); color:#fff; }
.exam-intro { max-width: var(--maxw); width: 100%; }
.exam-config { display: flex; flex-wrap: wrap; gap: 10px; align-items: center; margin: 0 0 22px; }

/* ===================== 响应式 ===================== */
@media (max-width: 1080px) {
  .chapter-toc { display: none; }
}
@media (max-width: 860px) {
  body { font-size: 16.5px; }
  .menu-btn { display: grid; }
  .sidebar {
    position: fixed; top: 52px; left: 0; z-index: 40;
    transform: translateX(-100%); transition: transform .28s ease;
    box-shadow: 4px 0 24px rgba(0,0,0,.18);
  }
  .sidebar.open { transform: translateX(0); }
  .overlay.show { display: block; }
  .content-wrap { padding: 0 18px; }
  .content { padding-top: 26px; }
  .chapter-title { font-size: 25px; }
  .content h2 { font-size: 20px; }
  .hero-title { font-size: 40px; letter-spacing: 2px; }
  .hero-sub { font-size: 18px; }
  .chapter-nav { flex-direction: column; }
  .topbar-sub { display: none; }
}
@media (max-width: 480px) {
  .content table { font-size: 13px; }
  .content th, .content td { padding: 7px 9px; }
  .hero-title { font-size: 33px; }
}