/* ============================================================
   拾卷 (Shijuan) — Warm-paper editorial / magazine aesthetic
   Tokens are MANDATORY and must match spec exactly.
   ============================================================ */

:root {
  /* ---- Color tokens (exact values from approved spec) ---- */
  --paper: #FAF9F5;
  --panel: #F0EEE6;
  --card:  #FFFFFF;
  --ink:   #191917;
  --ink-soft: #6E6B64;
  --accent: #D97757;      /* terracotta — THE accent */
  --accent-deep: #B85C3E;
  --sage: #7A8B6F;
  --gold: #C9A227;
  --line: rgba(25, 25, 23, .08);

  /* Derived helpers (no hue additions) */
  --ink-faint: rgba(25, 25, 23, .55);
  --ink-ghost: rgba(25, 25, 23, .06);
  --accent-soft: rgba(217, 119, 87, .12);
  --paper-warm: #F5F2E9;

  /* ---- Typography stacks (approved exception list only) ---- */
  --serif: "Noto Serif SC", "Source Serif 4", Georgia, "Songti SC", serif;
  --sans:  "Noto Sans SC", "PingFang SC", sans-serif;
  --mono:  "IBM Plex Mono", ui-monospace, monospace;

  /* ---- Spacing scale (8px base editorial rhythm) ---- */
  --s-1: 4px;
  --s-2: 8px;
  --s-3: 12px;
  --s-4: 16px;
  --s-5: 24px;
  --s-6: 32px;
  --s-7: 48px;
  --s-8: 64px;
  --s-9: 96px;

  /* ---- Radii (squircle-ish editorial) ---- */
  --r-xs: 4px;
  --r-sm: 8px;
  --r-md: 14px;
  --r-lg: 22px;
  --r-pill: 999px;

  /* ---- Shadows (soft, warm, hairline-first) ---- */
  --sh-card: 0 1px 2px rgba(25,25,23,.04), 0 8px 24px -16px rgba(25,25,23,.16);
  --sh-lift: 0 2px 6px rgba(25,25,23,.06), 0 18px 40px -22px rgba(25,25,23,.28);
  --sh-pop:  0 8px 30px -10px rgba(25,25,23,.22);

  /* ---- Layout constants ---- */
  --sidebar-w: 232px;
  --content-max: 880px;
  --tabbar-h: 64px;
  --masthead-h: 60px;

  /* ---- Motion ---- */
  --ease-out: cubic-bezier(0.22, 1, 0.36, 1);
  --ease-in-out: cubic-bezier(0.65, 0, 0.35, 1);
  --ease-spring: cubic-bezier(0.34, 1.56, 0.64, 1);
}

/* ============================================================
   Reset & base
   ============================================================ */

*, *::before, *::after { box-sizing: border-box; }

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.6;
  font-weight: 400;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  min-height: 100dvh;
  /* Subtle paper texture: layered warm gradient + grain-less stipple via radial-gradient */
  background-image:
    radial-gradient(1200px 600px at 85% -10%, rgba(217,119,87,.05), transparent 60%),
    radial-gradient(900px 500px at -10% 110%, rgba(122,139,111,.05), transparent 60%);
  background-attachment: fixed;
}

img, svg { display: block; max-width: 100%; }
button { font: inherit; color: inherit; background: none; border: 0; padding: 0; cursor: pointer; }
a { color: var(--accent-deep); text-decoration: none; }
a:hover { text-decoration: underline; text-underline-offset: 3px; }

::selection { background: var(--accent-soft); color: var(--ink); }

/* Focus-visible ring — accent */
:focus { outline: none; }
:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
  border-radius: var(--r-xs);
}

/* Hide scrollbars on horizontal rails while keeping function */
.no-scrollbar { scrollbar-width: none; -ms-overflow-style: none; }
.no-scrollbar::-webkit-scrollbar { display: none; }

/* ============================================================
   Typography defaults
   ============================================================ */

h1, h2, h3, h4 {
  font-family: var(--serif);
  color: var(--ink);
  margin: 0;
  line-height: 1.18;
  letter-spacing: -0.01em;
  font-weight: 600;
}

p { margin: 0; }

.micro {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--ink-soft);
}

.micro--accent { color: var(--accent-deep); }

/* ============================================================
   App shell
   ============================================================ */

.app {
  min-height: 100dvh;
  padding-bottom: calc(var(--tabbar-h) + env(safe-area-inset-bottom));
}

/* Desktop ≥1024px: fixed sidebar replaces bottom tab bar */
@media (min-width: 1024px) {
  .app {
    padding-bottom: 0;
    padding-left: var(--sidebar-w);
  }
}

/* ============================================================
   Sidebar (desktop only)
   ============================================================ */

.sidebar {
  display: none;
  position: fixed;
  inset: 0 auto 0 0;
  width: var(--sidebar-w);
  background: var(--panel);
  border-right: 1px solid var(--line);
  padding: var(--s-6) var(--s-5);
  flex-direction: column;
  gap: var(--s-5);
  z-index: 20;
}

.sidebar__brand {
  font-family: var(--serif);
  font-weight: 700;
  font-size: 30px;
  letter-spacing: 0.4em;       /* spaced vertical wordmark feel */
  writing-mode: vertical-rl;
  text-orientation: upright;
  align-self: flex-start;
  color: var(--ink);
  padding: var(--s-5) 0;
  border-top: 2px solid var(--ink);
  border-bottom: 1px solid var(--line);
}
.sidebar__brand small {
  display: block;
  font-family: var(--mono);
  font-size: 9px;
  letter-spacing: 0.2em;
  color: var(--ink-soft);
  writing-mode: horizontal-tb;
  margin-top: var(--s-3);
}

.sidebar__nav {
  display: flex;
  flex-direction: column;
  gap: 2px;
}
.sidebar__nav-link {
  display: flex;
  align-items: center;
  gap: var(--s-3);
  padding: var(--s-3) var(--s-2);
  border-radius: var(--r-sm);
  color: var(--ink);
  font-weight: 500;
  min-height: 44px;
  transition: background 200ms var(--ease-out), color 200ms var(--ease-out);
}
.sidebar__nav-link:hover {
  background: var(--card);
  text-decoration: none;
}
.sidebar__nav-link[aria-current="page"] {
  background: var(--card);
  color: var(--accent-deep);
  font-weight: 700;
}
.sidebar__nav-link svg { width: 20px; height: 20px; flex-shrink: 0; }

.sidebar__prefs {
  margin-top: auto;
  padding-top: var(--s-4);
  border-top: 1px solid var(--line);
  font-size: 12px;
  color: var(--ink-soft);
  line-height: 1.5;
}
.sidebar__prefs strong { color: var(--ink); font-weight: 700; }

@media (min-width: 1024px) {
  .sidebar { display: flex; }
}

/* ============================================================
   Sticky translucent masthead (mobile only)
   ============================================================ */

.masthead {
  position: sticky;
  top: 0;
  z-index: 30;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--s-3);
  padding: var(--s-3) var(--s-4);
  min-height: var(--masthead-h);
  background: rgba(250, 249, 245, 0.78);
  backdrop-filter: saturate(180%) blur(14px);
  -webkit-backdrop-filter: saturate(180%) blur(14px);
  border-bottom: 1px solid var(--line);
}
.masthead__date {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-soft);
}
.masthead__wordmark {
  font-family: var(--serif);
  font-weight: 700;
  font-size: 20px;
  letter-spacing: 0.32em;
  color: var(--ink);
}

@media (min-width: 1024px) {
  .masthead { display: none; }
}

/* ============================================================
   Main content column
   ============================================================ */

.content {
  max-width: var(--content-max);
  margin: 0 auto;
  padding: var(--s-5) var(--s-4) var(--s-8);
}
@media (min-width: 768px) {
  .content { padding: var(--s-7) var(--s-6) var(--s-9); }
}
@media (min-width: 1024px) {
  .content { padding: var(--s-8) var(--s-7) var(--s-9); }
}

/* ============================================================
   Bottom tab bar (mobile only)
   ============================================================ */

.tabbar {
  position: fixed;
  inset: auto 0 0 0;
  height: calc(var(--tabbar-h) + env(safe-area-inset-bottom));
  padding-bottom: env(safe-area-inset-bottom);
  background: rgba(250, 249, 245, 0.92);
  backdrop-filter: saturate(180%) blur(14px);
  -webkit-backdrop-filter: saturate(180%) blur(14px);
  border-top: 1px solid var(--line);
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  z-index: 40;
}
.tabbar__tab {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 4px;
  color: var(--ink-soft);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.08em;
  min-height: 44px;
  transition: color 200ms var(--ease-out);
}
.tabbar__tab svg {
  width: 22px; height: 22px;
  stroke-width: 1.75;
}
.tabbar__tab[aria-current="page"] { color: var(--accent-deep); font-weight: 700; }
.tabbar__tab[aria-current="page"] svg { stroke-width: 2.25; }
.tabbar__tab:focus-visible { outline-offset: -3px; }

@media (min-width: 1024px) {
  .tabbar { display: none; }
}

/* ============================================================
   Newspaper-style date masthead for 今日
   ============================================================ */

.dateline {
  border-top: 3px double var(--ink);
  border-bottom: 1px solid var(--line);
  padding: var(--s-5) 0 var(--s-4);
  margin-bottom: var(--s-6);
}
.dateline__row {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: var(--s-3);
  flex-wrap: wrap;
}
.dateline__vol {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--ink-soft);
}
.dateline__title {
  font-family: var(--serif);
  font-weight: 700;
  font-size: clamp(34px, 9vw, 56px);
  line-height: 1.05;
  letter-spacing: -0.02em;
  margin-top: var(--s-3);
}
.dateline__title em {
  font-style: normal;
  color: var(--accent-deep);
}
.dateline__weekday {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--ink-soft);
  margin-top: var(--s-2);
}

/* ============================================================
   Section headers (eyebrow + title pattern)
   ============================================================ */

.section-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: var(--s-3);
  margin: var(--s-7) 0 var(--s-4);
  padding-bottom: var(--s-3);
  border-bottom: 1px solid var(--line);
}
.section-head__title {
  font-family: var(--serif);
  font-weight: 600;
  font-size: clamp(20px, 4vw, 26px);
  letter-spacing: -0.01em;
}
.section-head__eyebrow {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--accent-deep);
  display: block;
  margin-bottom: 4px;
}
.section-head__meta {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--ink-soft);
  flex-shrink: 0;
}

/* ============================================================
   HERO card (today's pick #1)
   ============================================================ */

.hero {
  position: relative;
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--s-5);
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  padding: var(--s-5);
  margin-bottom: var(--s-5);
  overflow: hidden;
  transition:
    transform 320ms var(--ease-out),
    box-shadow 320ms var(--ease-out),
    border-color 320ms var(--ease-out);
}
.hero:hover {
  border-color: rgba(217, 119, 87, 0.4);
  box-shadow: var(--sh-lift);
}
.hero__index {
  position: absolute;
  inset: auto -10px -36px auto;
  font-family: var(--serif);
  font-weight: 700;
  font-size: clamp(180px, 40vw, 260px);
  line-height: 0.8;
  color: var(--ink-ghost);
  pointer-events: none;
  z-index: 0;
}
.hero__seal {
  position: absolute;
  top: var(--s-4);
  right: var(--s-4);
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  border: 1px solid var(--accent);
  color: var(--accent-deep);
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  border-radius: var(--r-pill);
  background: rgba(255,255,255,0.6);
  transform: rotate(-6deg);
  z-index: 2;
}
.hero__cover {
  display: block;
  width: 100%;
  aspect-ratio: 1 / 1.42;
  max-width: 220px;
  border-radius: var(--r-md);
  position: relative;
  z-index: 1;
  text-decoration: none;
  align-self: start;
  background: var(--paper-warm);
}
.hero__cover .cover {
  width: 100%;
  height: 100%;
}
.hero__body { position: relative; z-index: 1; }
.hero__cat {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--accent-deep);
}
.hero__title {
  font-family: var(--serif);
  font-weight: 700;
  font-size: clamp(26px, 6vw, 36px);
  line-height: 1.15;
  letter-spacing: -0.015em;
  margin: var(--s-2) 0 var(--s-2);
}
.hero__author {
  color: var(--ink-soft);
  font-size: 14px;
}
.hero__essence {
  font-family: var(--serif);
  font-size: clamp(15px, 3.4vw, 17px);
  line-height: 1.65;
  color: var(--ink);
  margin-top: var(--s-4);
  padding-left: var(--s-3);
  border-left: 2px solid var(--accent);
}
.hero__meta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--s-3) var(--s-4);
  margin-top: var(--s-4);
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-soft);
}
.hero__meta span { display: inline-flex; align-items: center; gap: 6px; }

@media (min-width: 768px) {
  .hero {
    grid-template-columns: 220px 1fr;
    gap: var(--s-6);
    padding: var(--s-6);
  }
  .hero__cover { aspect-ratio: 5/7; max-width: none; }
}

/* ============================================================
   Today picks #2 / #3 — offset asymmetric layout
   ============================================================ */

.picks-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--s-5);
}
@media (min-width: 680px) {
  .picks-grid { grid-template-columns: repeat(2, 1fr); gap: var(--s-5) var(--s-4); }
}

.pick {
  position: relative;
}
.pick--offset-left { transform: translateY(0); }
@media (min-width: 680px) {
  .pick--offset-left { transform: translateY(28px); }
}

/* ============================================================
   Generic pick card body (used in today + discover + related)
   ============================================================ */

.pick-card {
  position: relative;
  display: grid;
  grid-template-columns: 88px 1fr;
  gap: var(--s-3);
  align-items: start;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  padding: var(--s-3);
  transition:
    transform 280ms var(--ease-out),
    box-shadow 280ms var(--ease-out),
    border-color 280ms var(--ease-out);
  cursor: pointer;
  text-align: left;
  width: 100%;
  isolation: isolate;
}
.pick-card .cover {
  width: 88px;
  height: 124px;
  aspect-ratio: 1 / 1.42;
  border-radius: 4px;
  flex-shrink: 0;
  align-self: start;
}
.pick-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--sh-card), 0 12px 28px -18px rgba(25,25,23,.28);
  border-color: rgba(217,119,87,.35);
  text-decoration: none;
}
.pick-card:active { transform: translateY(-1px); }
.pick-card:focus-visible { outline-offset: 2px; }

.pick-card__index {
  position: absolute;
  inset: auto auto -14px 8px;
  font-family: var(--serif);
  font-weight: 700;
  font-size: 70px;
  line-height: 1;
  color: var(--ink-ghost);
  pointer-events: none;
  z-index: 0;
}
.pick-card > * { position: relative; z-index: 1; }

.pick-card__body { min-width: 0; }
.pick-card__cat {
  font-family: var(--mono);
  font-size: 9px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--ink-soft);
}
.pick-card__title {
  font-family: var(--serif);
  font-weight: 600;
  font-size: 18px;
  line-height: 1.25;
  margin: 4px 0 2px;
  letter-spacing: -0.005em;
  color: var(--ink);
  /* clamp 2 lines */
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.pick-card__author {
  font-size: 12px;
  color: var(--ink-soft);
}
.pick-card__essence {
  font-family: var(--serif);
  font-size: 13px;
  line-height: 1.5;
  color: var(--ink-faint);
  margin-top: var(--s-2);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.pick-card__meta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--s-2) var(--s-3);
  margin-top: var(--s-2);
  font-family: var(--mono);
  font-size: 9px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ink-soft);
}

/* ============================================================
   Procedural book covers (no external images)
   Deterministic per book.id hash -> palette + glyph
   ============================================================ */

.cover {
  position: relative;
  display: block;
  width: 100%;
  aspect-ratio: 1 / 1.42;
  overflow: hidden;
  background: var(--paper-warm);
  isolation: isolate;
  border-radius: 4px;
  box-shadow: 0 4px 14px -3px rgba(0,0,0,.16), 0 2px 5px -1px rgba(0,0,0,.08);
  transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1), box-shadow 0.3s ease;
  flex-shrink: 0;
}
.cover:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 20px -4px rgba(0,0,0,.22), 0 3px 6px -1px rgba(0,0,0,.12);
}
.cover__img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center top;
  border-radius: inherit;
  display: block;
  opacity: 1;
  z-index: 2;
  background: #252320;
  transition: transform 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}
.cover:hover .cover__img {
  transform: scale(1.025);
}
.cover__fallback {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  display: flex;
  flex-direction: column;
  align-items: stretch;
  z-index: 1;
}
.cover__spine {
  position: absolute;
  inset: 0 auto 0 0;
  width: 12px;
  background: linear-gradient(90deg, rgba(0,0,0,.35) 0%, rgba(255,255,255,.18) 25%, rgba(0,0,0,.06) 50%, transparent 100%);
  pointer-events: none;
  z-index: 4;
}
.cover__shimmer {
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(255,255,255,.12) 0%, transparent 50%, rgba(0,0,0,.08) 100%);
  pointer-events: none;
  z-index: 3;
}
.cover::before {
  /* spine highlight fallback */
  content: "";
  position: absolute;
  inset: 0 auto 0 0;
  width: 6px;
  background: linear-gradient(90deg, rgba(0,0,0,.18), rgba(0,0,0,0));
  z-index: 3;
}
.cover::after {
  /* paper grain edge */
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(120% 80% at 0% 50%, rgba(0,0,0,.08), transparent 40%),
    radial-gradient(80% 60% at 100% 100%, rgba(255,255,255,.08), transparent 50%);
  pointer-events: none;
  z-index: 2;
}
.cover__band {
  position: absolute;
  inset: auto 0 0 0;
  z-index: 1;
}
.cover__glyph {
  position: relative;
  z-index: 2;
  margin: auto;
  font-family: var(--serif);
  font-weight: 700;
  font-size: clamp(34px, 9vw, 56px);
  line-height: 1;
  letter-spacing: -0.02em;
  text-shadow: 0 1px 0 rgba(255,255,255,.18);
}
.cover__title-mini {
  position: relative;
  z-index: 2;
  font-family: var(--serif);
  font-weight: 600;
  font-size: 11px;
  letter-spacing: 0.06em;
  padding: var(--s-2) var(--s-2);
  align-self: flex-end;
  width: 100%;
  text-align: center;
  border-top: 1px solid rgba(255,255,255,.18);
}

/* Palette variants — duotone warm only (no cool hues permitted) */
.cover--p0 { background: linear-gradient(160deg, #E9C6AE 0%, #D97757 65%, #B85C3E 100%); color: #FFF8F2; }
.cover--p1 { background: linear-gradient(160deg, #CDD3BE 0%, #7A8B6F 65%, #5C6B53 100%); color: #FBFCF7; }
.cover--p2 { background: linear-gradient(160deg, #EBDFA8 0%, #C9A227 65%, #9E7E1E 100%); color: #FFFCEC; }
.cover--p3 { background: linear-gradient(160deg, #DAD8CF 0%, #6E6B64 65%, #3D3B37 100%); color: #F6F4EE; }
.cover--p4 { background: linear-gradient(160deg, #F1D7C5 0%, #E2A488 50%, #B85C3E 100%); color: #FFF6EF; }
.cover--p5 { background: linear-gradient(160deg, #E7E4D8 0%, #C9A227 30%, #7A8B6F 100%); color: #FCFBF5; }

/* cover band decoration patterns */
.cover--p0 .cover__band { background: repeating-linear-gradient(45deg, transparent 0 8px, rgba(255,255,255,.06) 8px 9px); }
.cover--p1 .cover__band { background: repeating-linear-gradient(90deg, transparent 0 12px, rgba(255,255,255,.06) 12px 13px); }
.cover--p2 .cover__band { background: radial-gradient(circle at 30% 30%, rgba(255,255,255,.16), transparent 40%); }
.cover--p3 .cover__band { background: repeating-linear-gradient(0deg, transparent 0 6px, rgba(255,255,255,.05) 6px 7px); }
.cover--p4 .cover__band { background: linear-gradient(180deg, transparent 0%, rgba(255,255,255,.12) 50%, transparent 100%); }
.cover--p5 .cover__band { background: conic-gradient(from 180deg at 50% 50%, transparent, rgba(255,255,255,.08), transparent); }

/* ============================================================
   Horizontal scroll-snap rail (为你推荐 / related)
   ============================================================ */

.rail {
  display: grid;
  grid-auto-flow: column;
  grid-auto-columns: 78%;
  gap: var(--s-3);
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  padding: var(--s-2) var(--s-4) var(--s-4);
  margin: 0 calc(-1 * var(--s-4));
  -webkit-overflow-scrolling: touch;
}
.rail > * { scroll-snap-align: start; }
@media (min-width: 540px) { .rail { grid-auto-columns: 46%; } }
@media (min-width: 768px) {
  .rail {
    display: grid;
    grid-auto-flow: row;
    grid-auto-columns: initial;
    grid-template-columns: repeat(3, 1fr);
    overflow: visible;
    margin: 0;
    padding: 0;
    scroll-snap-type: none;
  }
}
@media (min-width: 1024px) {
  .rail { grid-template-columns: repeat(3, 1fr); }
}

/* ============================================================
   Discover — sticky filter row + chips + grid
   ============================================================ */

.filters {
  position: sticky;
  top: var(--masthead-h);
  z-index: 20;
  background: rgba(250, 249, 245, 0.92);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  padding: var(--s-3) 0;
  margin: 0 calc(-1 * var(--s-4)) var(--s-4);
  padding-left: var(--s-4);
  padding-right: var(--s-4);
  border-bottom: 1px solid var(--line);
}
@media (min-width: 1024px) { .filters { top: 0; } }

.chip-row {
  display: flex;
  gap: var(--s-2);
}

@media (max-width: 767px) {
  .chip-row {
    flex-wrap: nowrap;
    overflow-x: auto;
    scroll-snap-type: x proximity;
    scroll-padding-left: 14px;
    scroll-padding-right: 14px;
    padding-bottom: 4px;
    -webkit-mask-image: linear-gradient(90deg, transparent 0, #000 14px, #000 calc(100% - 14px), transparent 100%);
    mask-image: linear-gradient(90deg, transparent 0, #000 14px, #000 calc(100% - 14px), transparent 100%);
  }
  .chip-row > * {
    scroll-snap-align: start;
    flex-shrink: 0;
  }
}

@media (min-width: 768px) {
  .chip-row { flex-wrap: wrap; }
  .chip-row > * { flex-shrink: 0; }
}

.chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 7px 14px;
  min-height: 36px;
  border-radius: var(--r-pill);
  border: 1px solid var(--line);
  background: var(--card);
  color: var(--ink);
  font-size: 13px;
  font-weight: 500;
  white-space: nowrap;
  transition: all 200ms var(--ease-out);
}
.chip:hover { border-color: rgba(217,119,87,.45); color: var(--accent-deep); }
.chip[aria-pressed="true"] {
  background: var(--ink);
  color: var(--paper);
  border-color: var(--ink);
  font-weight: 700;
}
.chip--cat[aria-pressed="true"] {
  background: var(--accent);
  border-color: var(--accent);
  color: #FFF8F2;
}
.chip:focus-visible { outline-offset: 2px; }

.filter-label {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--ink-soft);
  margin: var(--s-3) 0 var(--s-2);
}

.result-meta {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--ink-soft);
  margin: var(--s-4) 0;
  padding-bottom: var(--s-3);
  border-bottom: 1px solid var(--line);
}

.discover-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--s-4);
}
@media (min-width: 680px) { .discover-grid { grid-template-columns: repeat(2, 1fr); } }

/* ============================================================
   Shelf — prefs editor, favorites list, empty state, stats
   ============================================================ */

.shelf-stats {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--ink-soft);
  margin: var(--s-4) 0;
}
.shelf-stats strong { color: var(--accent-deep); font-weight: 700; }

.pref-editor {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  padding: var(--s-5);
  margin: var(--s-5) 0;
}
.pref-editor__hint {
  color: var(--ink-soft);
  font-size: 13px;
  margin-top: var(--s-2);
}

.action-row {
  display: flex;
  align-items: center;
  gap: var(--s-3);
  margin-top: var(--s-4);
  flex-wrap: wrap;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--s-2);
  min-height: 44px;
  padding: 10px 18px;
  border-radius: var(--r-pill);
  font-weight: 700;
  font-size: 14px;
  letter-spacing: 0.02em;
  transition:
    transform 160ms var(--ease-out),
    background 200ms var(--ease-out),
    color 200ms var(--ease-out),
    border-color 200ms var(--ease-out);
}
.btn:active { transform: scale(0.97); }
.btn svg { width: 18px; height: 18px; }

.btn--primary { background: var(--accent); color: #FFF8F2; }
.btn--primary:hover { background: var(--accent-deep); text-decoration: none; }

.btn--ghost {
  background: transparent;
  border: 1px solid var(--line);
  color: var(--ink);
}
.btn--ghost:hover { border-color: var(--accent); color: var(--accent-deep); text-decoration: none; }

.link-quiet {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--ink-soft);
  background: none;
  border: 0;
  padding: var(--s-2) 0;
  cursor: pointer;
}
.link-quiet:hover { color: var(--accent-deep); text-decoration: underline; }

.confirm-inline {
  display: inline-flex;
  align-items: center;
  gap: var(--s-2);
  font-size: 13px;
  color: var(--ink-soft);
}

.fav-row {
  position: relative;
  display: grid;
  grid-template-columns: 64px 1fr auto;
  gap: var(--s-3);
  align-items: center;
  padding: var(--s-3);
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  margin-bottom: var(--s-2);
  transition: border-color 200ms var(--ease-out), transform 200ms var(--ease-out);
}
.fav-row .cover {
  width: 64px;
  height: 90px;
  aspect-ratio: 1 / 1.42;
  border-radius: 3px;
  flex-shrink: 0;
}
.fav-row:hover { border-color: rgba(217,119,87,.4); }
.fav-row__title { font-family: var(--serif); font-weight: 600; font-size: 16px; }
.fav-row__meta { font-size: 12px; color: var(--ink-soft); margin-top: 2px; }
.fav-row__remove {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px; height: 40px;
  color: var(--ink-soft);
  border-radius: var(--r-pill);
  transition: color 160ms var(--ease-out), background 160ms var(--ease-out);
}
.fav-row__remove:hover { color: var(--accent-deep); background: var(--accent-soft); }

/* Empty shelf illustration */
.empty {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  padding: var(--s-7) var(--s-4);
  gap: var(--s-3);
  color: var(--ink-soft);
}
.empty__svg { color: var(--ink-ghost); }
.empty__title {
  font-family: var(--serif);
  font-weight: 600;
  font-size: 22px;
  color: var(--ink);
  margin-top: var(--s-3);
}
.empty__copy { max-width: 320px; font-size: 14px; }

/* First-run hint banner */
.hint-banner {
  display: flex;
  align-items: center;
  gap: var(--s-3);
  background: var(--accent-soft);
  border: 1px solid rgba(217,119,87,.3);
  border-left: 3px solid var(--accent);
  border-radius: var(--r-md);
  padding: var(--s-3) var(--s-4);
  margin-bottom: var(--s-5);
  font-size: 13px;
  color: var(--ink);
}
.hint-banner svg { width: 18px; height: 18px; color: var(--accent-deep); flex-shrink: 0; }
.hint-banner__close {
  margin-left: auto;
  display: inline-flex;
  width: 32px; height: 32px;
  align-items: center; justify-content: center;
  color: var(--ink-soft);
  border-radius: var(--r-pill);
}
.hint-banner__close:hover { color: var(--ink); background: rgba(0,0,0,.05); }

/* ============================================================
   Book detail page
   ============================================================ */

.back-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--ink-soft);
  padding: var(--s-2) 0;
  margin-bottom: var(--s-3);
}
.back-link:hover { color: var(--accent-deep); text-decoration: none; }
.back-link svg { width: 16px; height: 16px; }

.detail-header {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--s-5);
  margin-bottom: var(--s-6);
}
@media (min-width: 680px) {
  .detail-header { grid-template-columns: 200px 1fr; gap: var(--s-6); align-items: start; }
}
.detail-cover {
  width: 100%;
  max-width: 220px;
  aspect-ratio: 1 / 1.42;
  border-radius: var(--r-md);
  box-shadow: var(--sh-card);
  display: block;
}
.detail-cover .cover {
  width: 100%;
  height: 100%;
}
@media (min-width: 680px) { .detail-cover { max-width: 210px; } }
.detail-cover-wrap { display: flex; justify-content: center; align-items: start; }

.detail-title {
  font-family: var(--serif);
  font-weight: 700;
  font-size: clamp(28px, 6vw, 40px);
  line-height: 1.15;
  letter-spacing: -0.015em;
  margin: var(--s-2) 0;
}
.detail-titleen {
  font-family: var(--serif);
  font-style: italic;
  font-weight: 500;
  color: var(--ink-soft);
  font-size: 16px;
}
.detail-author { font-size: 14px; color: var(--ink-soft); margin-top: var(--s-2); }

.detail-meta-row {
  display: flex;
  flex-wrap: wrap;
  gap: var(--s-2) var(--s-4);
  margin-top: var(--s-4);
  padding-top: var(--s-3);
  border-top: 1px solid var(--line);
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--ink-soft);
}
.detail-meta-row span { display: inline-flex; align-items: center; gap: 6px; }
.diff-dot {
  display: inline-block;
  width: 8px; height: 8px;
  border-radius: 50%;
  margin-right: 4px;
}
.diff-dot--入门 { background: var(--sage); }
.diff-dot--进阶 { background: var(--gold); }
.diff-dot--硬核 { background: var(--ink); }

.detail-section {
  margin: var(--s-7) 0;
}
.detail-section__title {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--accent-deep);
  margin-bottom: var(--s-3);
  display: flex;
  align-items: center;
  gap: var(--s-2);
}
.detail-section__title::after {
  content: "";
  flex: 1;
  height: 1px;
  background: var(--line);
}

.pull-quote {
  font-family: var(--serif);
  font-weight: 500;
  font-size: clamp(20px, 5vw, 28px);
  line-height: 1.4;
  color: var(--ink);
  padding: var(--s-2) 0 var(--s-2) var(--s-4);
  border-left: 3px solid var(--accent);
  margin: var(--s-4) 0;
  letter-spacing: -0.005em;
}

.body-prose {
  font-family: var(--serif);
  font-size: 16px;
  line-height: 1.75;
  color: var(--ink);
}
.body-prose p + p { margin-top: var(--s-3); }
.body-prose.has-dropcap > p:first-child::first-letter {
  font-family: var(--serif);
  font-weight: 700;
  font-size: 3.4em;
  line-height: 0.86;
  float: left;
  padding: 6px 8px 0 0;
  color: var(--accent-deep);
}

/* Numbered ideas — serif numerals + hairline separators */
.ideas {
  list-style: none;
  padding: 0;
  margin: var(--s-3) 0 0;
  counter-reset: idea;
}
.ideas__item {
  display: grid;
  grid-template-columns: 56px 1fr;
  gap: var(--s-3);
  padding: var(--s-4) 0;
  border-top: 1px solid var(--line);
  counter-increment: idea;
}
.ideas__item:last-child { border-bottom: 1px solid var(--line); }
.ideas__num {
  font-family: var(--serif);
  font-weight: 700;
  font-size: 30px;
  line-height: 1;
  color: var(--accent-deep);
  letter-spacing: -0.02em;
}
.ideas__num::before { content: counter(idea, decimal-leading-zero); }
.ideas__title {
  font-family: var(--serif);
  font-weight: 600;
  font-size: 17px;
  margin-bottom: 4px;
  color: var(--ink);
}
.ideas__detail {
  font-size: 15px;
  color: var(--ink-soft);
  line-height: 1.6;
}
.ideas__apply {
  display: flex;
  align-items: baseline;
  flex-wrap: wrap;
  gap: 6px 8px;
  margin-top: var(--s-3);
  padding-top: var(--s-3);
  border-top: 1px solid var(--line);
}
.ideas__apply-icon {
  display: inline-flex;
  align-items: center;
  color: var(--accent);
  flex-shrink: 0;
}
.ideas__apply-icon svg { width: 14px; height: 14px; }
.ideas__apply-label {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--accent-deep);
  font-weight: 500;
  flex-shrink: 0;
}
.ideas__apply-text {
  font-size: 13px;
  color: var(--ink-soft);
  line-height: 1.5;
  min-width: 0;
}

.frameworks {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--s-3);
  margin-top: var(--s-3);
}
.framework {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  padding: var(--s-4);
}
.framework__name {
  font-family: var(--serif);
  font-weight: 600;
  font-size: 16px;
  line-height: 1.3;
  color: var(--ink);
  margin-bottom: 4px;
}
.framework__name + .framework__detail { margin-top: var(--s-2); }
.framework__detail {
  font-family: var(--sans);
  font-size: 14px;
  line-height: 1.6;
  color: var(--ink-soft);
}
@media (min-width: 1024px) {
  .frameworks { grid-template-columns: repeat(2, 1fr); gap: var(--s-3) var(--s-4); }
}

/* Golden quote blocks */
.quote-block {
  position: relative;
  padding: var(--s-3) var(--s-4);
  margin: var(--s-2) 0;
  border-left: 2px solid var(--accent);
  font-family: var(--serif);
  font-style: italic;
  font-size: 16px;
  line-height: 1.6;
  color: var(--ink);
  background: var(--paper-warm);
  border-radius: 0 var(--r-sm) var(--r-sm) 0;
}
.quote-block + .quote-block { margin-top: var(--s-3); }

/* Action checklist */
.checklist { list-style: none; padding: 0; margin: var(--s-3) 0; }
.checklist__item {
  display: grid;
  grid-template-columns: 28px 1fr;
  gap: var(--s-3);
  align-items: start;
  padding: var(--s-3) 0;
  border-bottom: 1px solid var(--line);
  cursor: pointer;
  min-height: 44px;
}
.checklist__check {
  appearance: none;
  width: 22px; height: 22px;
  border: 1.5px solid var(--ink-soft);
  border-radius: var(--r-xs);
  background: var(--card);
  cursor: pointer;
  position: relative;
  transition: background 160ms var(--ease-out), border-color 160ms var(--ease-out);
  margin-top: 2px;
}
.checklist__check:checked {
  background: var(--accent);
  border-color: var(--accent);
}
.checklist__check:checked::after {
  content: "";
  position: absolute;
  left: 6px;
  top: 2px;
  border-right: 2.2px solid #FFF8F2;
  border-bottom: 2.2px solid #FFF8F2;
  transform: rotate(45deg);
  width: 6px;
  height: 12px;
}
.checklist__label {
  font-family: var(--serif);
  font-size: 15px;
  line-height: 1.55;
  color: var(--ink);
  transition: color 160ms var(--ease-out);
}
.checklist__item.is-checked .checklist__label,
.checklist__item:has(.checklist__check:checked) .checklist__label {
  color: var(--ink-soft);
  text-decoration: line-through;
  text-decoration-color: var(--accent);
  text-decoration-thickness: 1.5px;
}

.who-read {
  font-family: var(--serif);
  font-size: 15px;
  line-height: 1.7;
  color: var(--ink);
  padding: var(--s-4);
  background: var(--paper-warm);
  border-radius: var(--r-md);
  border-left: 2px solid var(--sage);
}

/* Sticky floating favorite heart */
.fab {
  position: fixed;
  inset: auto var(--s-4) calc(var(--tabbar-h) + var(--s-4) + env(safe-area-inset-bottom)) auto;
  width: 56px; height: 56px;
  border-radius: var(--r-pill);
  background: var(--card);
  border: 1px solid var(--line);
  box-shadow: var(--sh-pop);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: var(--ink);
  z-index: 35;
  transition: transform 200ms var(--ease-out), color 200ms var(--ease-out), border-color 200ms var(--ease-out);
}
.fab:hover { transform: translateY(-2px); color: var(--accent-deep); border-color: var(--accent); }
.fab:active { transform: scale(0.95); }
.fab svg { width: 24px; height: 24px; transition: fill 200ms var(--ease-out); }
.fab[aria-pressed="true"] { color: var(--accent); border-color: var(--accent); }
.fab[aria-pressed="true"] svg { fill: var(--accent); }
.fab.is-popping svg { animation: heart-pop 420ms var(--ease-spring); }

@media (min-width: 1024px) {
  .fab { inset: auto var(--s-5) var(--s-5) auto; bottom: var(--s-5); }
}

/* ============================================================
   Toast
   ============================================================ */

.toast {
  position: fixed;
  inset: auto 50% calc(var(--tabbar-h) + var(--s-4) + env(safe-area-inset-bottom)) 50%;
  transform: translate(-50%, 16px);
  background: var(--ink);
  color: var(--paper);
  padding: 10px 18px;
  border-radius: var(--r-pill);
  font-size: 13px;
  font-weight: 500;
  opacity: 0;
  pointer-events: none;
  transition: opacity 240ms var(--ease-out), transform 240ms var(--ease-out);
  z-index: 60;
  max-width: 88vw;
  text-align: center;
  box-shadow: var(--sh-pop);
}
.toast.is-visible {
  opacity: 1;
  transform: translate(-50%, 0);
}
@media (min-width: 1024px) {
  .toast { inset: auto 50% var(--s-6) 50%; }
}

/* ============================================================
   Error card (data missing)
   ============================================================ */

.error-card {
  margin: var(--s-7) auto;
  max-width: 480px;
  background: var(--card);
  border: 1px solid rgba(217,119,87,.4);
  border-left: 3px solid var(--accent);
  border-radius: var(--r-md);
  padding: var(--s-6);
  text-align: center;
}
.error-card__title {
  font-family: var(--serif);
  font-weight: 600;
  font-size: 22px;
  margin-bottom: var(--s-2);
}
.error-card__copy { color: var(--ink-soft); font-size: 14px; }
.error-card__retry {
  margin-top: var(--s-4);
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--accent-deep);
}

/* ============================================================
   Animations & motion
   ============================================================ */

@keyframes reveal-up {
  from { opacity: 0; transform: translateY(16px); }
  to   { opacity: 1; transform: translateY(0); }
}
@keyframes heart-pop {
  0%   { transform: scale(1); }
  35%  { transform: scale(1.35); }
  60%  { transform: scale(0.9); }
  100% { transform: scale(1); }
}

/* Stagger reveal — applied via JS by setting --i */
.reveal {
  opacity: 0;
  animation: reveal-up 600ms var(--ease-out) forwards;
  animation-delay: calc(var(--i, 0) * 60ms);
}

/* Honor reduced motion */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }
  .reveal { opacity: 1; transform: none; animation: none; }
}

/* Touch-hover gating: only apply hover-lift on fine pointers */
@media (hover: none) {
  .pick-card:hover,
  .hero:hover { transform: none; box-shadow: var(--sh-card); }
}

/* ============================================================
   Small utilities
   ============================================================ */

.tag {
  display: inline-flex;
  align-items: center;
  padding: 2px 8px;
  font-size: 11px;
  font-family: var(--mono);
  letter-spacing: 0.1em;
  color: var(--ink-soft);
  border: 1px solid var(--line);
  border-radius: var(--r-pill);
  background: var(--paper-warm);
}

/* ============================================================
   Focus Reader (精读模式) — full-screen immersive step reader
   ============================================================ */
body.reader-mode { overflow: hidden; }

.reader {
  position: fixed;
  inset: 0;
  z-index: 100;
  display: flex;
  flex-direction: column;
  background-color: var(--paper);
  background-image: url("assets/reader-paper.jpg");
  background-size: cover;
  background-position: center;
}
.reader::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(250, 249, 245, 0.5), rgba(250, 249, 245, 0.35));
  pointer-events: none;
  z-index: 0;
}

.reader__progress {
  position: relative;
  z-index: 3;
  height: 3px;
  background: var(--line);
  flex-shrink: 0;
}
.reader__progress-bar {
  height: 100%;
  width: 0%;
  background: var(--accent);
}

.reader__top {
  position: relative;
  z-index: 2;
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 18px;
  border-bottom: 1px solid var(--line);
  background: rgba(250, 249, 245, 0.7);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
}
.reader__close {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-soft);
  padding: 7px 12px;
  border-radius: var(--r-pill);
  border: 1px solid var(--line);
  transition: all 200ms var(--ease-out);
  flex-shrink: 0;
}
.reader__close:hover { color: var(--accent-deep); border-color: var(--accent); }
.reader__title {
  flex: 1;
  text-align: center;
  font-family: var(--serif);
  font-weight: 600;
  font-size: 14px;
  color: var(--ink);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  min-width: 0;
}
.reader__counter {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--ink-soft);
  min-width: 58px;
  text-align: right;
  flex-shrink: 0;
}

.reader__stage {
  position: relative;
  z-index: 1;
  flex: 1;
  overflow-y: auto;
  overflow-x: hidden;
  padding: 36px 22px 28px;
  -webkit-overflow-scrolling: touch;
}
.reader__stage-inner {
  max-width: 640px;
  margin: 0 auto;
}
@media (min-width: 768px) {
  .reader__stage { padding: 56px 32px 40px; }
}

.reader__nav {
  position: relative;
  z-index: 2;
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 18px calc(12px + env(safe-area-inset-bottom));
  border-top: 1px solid var(--line);
  background: rgba(250, 249, 245, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}
.reader__nav-btn {
  min-height: 44px;
  padding: 10px 18px;
  border-radius: var(--r-pill);
  font-weight: 700;
  font-size: 14px;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: all 200ms var(--ease-out);
  flex-shrink: 0;
}
.reader__nav-btn--prev {
  background: transparent;
  border: 1px solid var(--line);
  color: var(--ink);
}
.reader__nav-btn--prev:disabled { opacity: 0.35; cursor: not-allowed; }
.reader__nav-btn--next { background: var(--accent); color: #FFF8F2; }
.reader__nav-btn--next:hover:not(:disabled) { background: var(--accent-deep); }
.reader__nav-btn--next:disabled { background: var(--line); color: var(--ink-soft); cursor: not-allowed; }
.reader__dots {
  flex: 1;
  display: flex;
  justify-content: center;
  gap: 6px;
  flex-wrap: wrap;
  min-width: 0;
}
.reader__dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--line);
  border: 0;
  padding: 0;
  cursor: pointer;
  transition: all 250ms var(--ease-out);
}
.reader__dot.is-active { background: var(--accent); transform: scale(1.35); }
.reader__dot.is-done { background: var(--accent-deep); opacity: 0.45; }

/* ---- Step content ---- */
.r-step__eyebrow {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--accent-deep);
  margin-bottom: 20px;
  display: flex;
  align-items: center;
  gap: 10px;
}
.r-step__eyebrow::after {
  content: "";
  flex: 1;
  height: 1px;
  background: var(--line);
}

/* Intro */
.r-step--intro { text-align: center; padding-top: 6px; }
.r-intro__cover { width: 150px; margin: 0 auto 22px; }
@media (min-width: 768px) { .r-intro__cover { width: 170px; } }
.r-intro__cat {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--accent-deep);
}
.r-intro__title {
  font-family: var(--serif);
  font-weight: 700;
  font-size: clamp(24px, 6vw, 34px);
  line-height: 1.2;
  margin: 10px 0 6px;
}
.r-intro__author { color: var(--ink-soft); font-size: 14px; }
.r-intro__essence {
  font-family: var(--serif);
  font-size: clamp(16px, 3.6vw, 19px);
  line-height: 1.7;
  color: var(--ink);
  margin: 24px auto;
  max-width: 520px;
  padding: 16px 8px;
  border-top: 2px solid var(--accent);
  border-bottom: 2px solid var(--accent);
}
.r-intro__meta {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--ink-soft);
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 6px 14px;
  margin-bottom: 18px;
}
.r-intro__meta span { display: inline-flex; align-items: center; gap: 6px; }
.r-intro__map {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  align-items: center;
  gap: 6px;
  margin-top: 4px;
}
.r-intro__map-item {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.12em;
  padding: 5px 10px;
  border: 1px solid var(--line);
  border-radius: var(--r-pill);
  color: var(--ink-soft);
  background: rgba(255, 255, 255, 0.55);
}
.r-intro__map-arrow { color: var(--ink-ghost); font-size: 10px; }
.r-intro__badge {
  display: inline-block;
  margin-top: 18px;
  padding: 5px 12px;
  border: 1px solid var(--sage);
  color: var(--sage);
  border-radius: var(--r-pill);
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

/* Why / prose */
.r-body-prose {
  font-family: var(--serif);
  font-size: 17px;
  line-height: 1.85;
  color: var(--ink);
}
.r-body-prose.has-dropcap > p:first-child::first-letter {
  font-family: var(--serif);
  font-weight: 700;
  font-size: 3.2em;
  line-height: 0.9;
  float: left;
  padding: 4px 10px 0 0;
  color: var(--accent-deep);
}

/* Idea */
.r-idea__num {
  font-family: var(--serif);
  font-weight: 700;
  font-size: 52px;
  line-height: 1;
  color: var(--accent-deep);
  opacity: 0.85;
  margin-bottom: 6px;
}
.r-idea__title {
  font-family: var(--serif);
  font-weight: 600;
  font-size: clamp(20px, 4.5vw, 26px);
  line-height: 1.3;
  margin: 0 0 14px;
}
.r-idea__detail {
  font-size: 16px;
  line-height: 1.75;
  color: var(--ink-soft);
}
.r-idea__apply {
  margin-top: 22px;
  padding: 16px 18px;
  background: var(--paper-warm);
  border-left: 3px solid var(--accent);
  border-radius: 0 var(--r-sm) var(--r-sm) 0;
}
.r-idea__apply-label {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--accent-deep);
  font-weight: 600;
  display: block;
  margin-bottom: 6px;
}
.r-idea__apply-text {
  font-size: 14px;
  line-height: 1.6;
  color: var(--ink);
}

/* Quote */
.r-step--quote { text-align: center; padding-top: 36px; }
.r-quote {
  font-family: var(--serif);
  font-weight: 500;
  font-size: clamp(22px, 5vw, 32px);
  line-height: 1.55;
  color: var(--ink);
  max-width: 560px;
  margin: 0 auto;
  padding: 0 8px;
}

/* Actions */
.r-actions__hint {
  font-size: 14px;
  line-height: 1.6;
  color: var(--ink-soft);
  margin-bottom: 18px;
}
.r-check-label { cursor: pointer; display: contents; }

/* Done */
.r-step--done { text-align: center; padding-top: 8px; }
.r-done__img {
  width: min(280px, 72%);
  margin: 0 auto 22px;
  border-radius: var(--r-md);
  box-shadow: var(--sh-lift);
}
.r-done__seal {
  display: inline-block;
  font-family: var(--serif);
  font-weight: 700;
  font-size: 14px;
  letter-spacing: 0.3em;
  color: #FFF8F2;
  background: var(--accent-deep);
  padding: 8px 20px;
  border-radius: 4px;
  transform: rotate(-4deg);
  box-shadow: 0 4px 14px rgba(184, 92, 62, 0.32);
  margin-bottom: 18px;
}
.r-done__title {
  font-family: var(--serif);
  font-weight: 700;
  font-size: clamp(22px, 5vw, 30px);
  margin-bottom: 10px;
}
.r-done__stats {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-soft);
  margin-bottom: 24px;
}
.r-done__actions {
  display: flex;
  flex-direction: column;
  gap: 10px;
  align-items: stretch;
  max-width: 320px;
  margin: 0 auto;
}
.r-done__actions .btn { justify-content: center; }
.r-done__celebrate {
  margin-top: 24px;
  font-family: var(--serif);
  font-size: 16px;
  color: var(--sage);
}

@media (prefers-reduced-motion: reduce) {
  .reader__progress-bar { transition: none; }
}

/* ============================================================
   Today Journey (今日精读旅程)
   ============================================================ */
.journey {
  position: relative;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  padding: var(--s-5);
  margin-bottom: var(--s-6);
  overflow: hidden;
}
.journey::before {
  content: "";
  position: absolute;
  top: -50px;
  right: -50px;
  width: 180px;
  height: 180px;
  background: radial-gradient(circle, var(--accent-soft), transparent 70%);
  pointer-events: none;
}
.journey__head {
  position: relative;
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  gap: 12px;
  margin-bottom: var(--s-4);
}
.journey__title {
  font-family: var(--serif);
  font-weight: 600;
  font-size: clamp(20px, 4vw, 26px);
  margin-top: 4px;
}
.journey__meta {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--ink-soft);
  flex-shrink: 0;
}
.journey__path {
  position: relative;
  display: flex;
  align-items: stretch;
  margin-bottom: var(--s-4);
}
.journey__stop {
  position: relative;
  flex: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  padding: 14px 8px;
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  background: var(--paper);
  text-decoration: none;
  color: inherit;
  transition: all 250ms var(--ease-out);
}
.journey__stop + .journey__stop { margin-left: 10px; }
.journey__stop + .journey__stop::before {
  content: "";
  position: absolute;
  left: -10px;
  top: 50%;
  width: 10px;
  height: 1px;
  background: var(--line);
}
.journey__stop:hover {
  border-color: rgba(217, 119, 87, 0.4);
  transform: translateY(-2px);
  text-decoration: none;
}
.journey__stop.is-done {
  border-color: var(--sage);
  background: linear-gradient(180deg, rgba(122, 139, 111, 0.07), transparent);
}
.journey__stop.is-active {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-soft);
}
.journey__stop-num {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--ink);
  color: var(--paper);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--serif);
  font-weight: 700;
  font-size: 15px;
  margin-bottom: 8px;
}
.journey__stop.is-done .journey__stop-num { background: var(--sage); }
.journey__stop.is-active .journey__stop-num { background: var(--accent); }
.journey__stop-title {
  font-family: var(--serif);
  font-weight: 600;
  font-size: 13px;
  line-height: 1.3;
  color: var(--ink);
  margin-bottom: 4px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.journey__stop-state {
  font-family: var(--mono);
  font-size: 9px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-soft);
}
.journey__stop.is-done .journey__stop-state { color: var(--sage); }
.journey__stop.is-active .journey__stop-state { color: var(--accent-deep); }
.journey__foot {
  position: relative;
  display: flex;
  align-items: center;
  gap: 14px;
  flex-wrap: wrap;
}
.journey__hint {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-soft);
}

/* ============================================================
   Detail page read CTA
   ============================================================ */
.read-cta-row {
  margin-top: 18px;
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}
.read-cta__hint {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-soft);
}

/* ============================================================
   v2 — Internalization · habit loop · reader settings · status
   ============================================================ */

/* Reader top-right cluster: live timer + settings + counter */
.reader__top-right { display: flex; align-items: center; gap: 10px; flex-shrink: 0; }
.reader__time {
  font-family: var(--mono); font-size: 11px; letter-spacing: 0.06em;
  color: var(--ink-soft); min-width: 42px; text-align: right;
}
.reader__settings-btn {
  width: 32px; height: 32px; border-radius: 50%; border: 1px solid var(--line);
  background: transparent; color: var(--ink-soft); font-family: var(--serif);
  font-weight: 700; font-size: 13px; display: grid; place-items: center;
  cursor: pointer; transition: all 200ms var(--ease-out);
}
.reader__settings-btn:hover { color: var(--accent-deep); border-color: var(--accent); }

/* Reader settings panel */
.r-settings {
  position: absolute; z-index: 6; top: 56px; right: 16px;
  background: var(--card); border: 1px solid var(--line); border-radius: var(--r-md);
  box-shadow: 0 22px 48px -22px rgba(25,25,23,.35);
  padding: 14px 16px; display: flex; flex-direction: column; gap: 12px; min-width: 232px;
}
.r-settings[hidden] { display: none; }
.r-settings__row { display: flex; align-items: center; justify-content: space-between; gap: 14px; }
.r-settings__label {
  font-family: var(--mono); font-size: 10px; letter-spacing: 0.18em;
  text-transform: uppercase; color: var(--ink-soft);
}
.r-set-group { display: inline-flex; border: 1px solid var(--line); border-radius: var(--r-pill); overflow: hidden; }
.r-set-opt {
  border: 0; background: transparent; padding: 6px 13px; font-size: 12px;
  color: var(--ink-soft); cursor: pointer; font-family: var(--sans);
  transition: all 180ms var(--ease-out);
}
.r-set-opt + .r-set-opt { border-left: 1px solid var(--line); }
.r-set-opt.is-on { background: var(--accent); color: #FFF8F2; font-weight: 600; }
.r-set-opt:not(.is-on):hover { color: var(--accent-deep); }

/* Active-recall veil (先想一想) */
.r-recall { position: relative; margin-top: 22px; }
.r-recall__body {
  padding: 16px 18px; background: var(--paper-warm);
  border-left: 3px solid var(--accent); border-radius: 0 var(--r-sm) var(--r-sm) 0;
}
.r-recall.is-covered .r-recall__body { filter: blur(3px); opacity: 0.5; user-select: none; }
.r-recall__veil {
  position: absolute; inset: 0; display: flex; flex-direction: column;
  align-items: center; justify-content: center; gap: 6px; text-align: center;
  padding: 14px; border-radius: var(--r-sm); cursor: pointer;
  background: rgba(250,249,245,.6); backdrop-filter: blur(2px); -webkit-backdrop-filter: blur(2px);
  border: 1px dashed var(--accent);
}
.r-recall:not(.is-covered) .r-recall__veil { display: none; }
.r-recall__veil-title { font-family: var(--serif); font-weight: 700; font-size: 16px; color: var(--accent-deep); letter-spacing: 0.08em; }
.r-recall__veil-hint { font-size: 12px; line-height: 1.55; color: var(--ink-soft); max-width: 300px; }
.r-recall__veil-cta { margin-top: 4px; font-family: var(--mono); font-size: 11px; letter-spacing: 0.12em; color: var(--accent-deep); text-transform: uppercase; }

/* Quote save / copy */
.r-quote-actions { display: flex; gap: 10px; justify-content: center; margin-top: 26px; }
.r-chip {
  font-family: var(--sans); font-size: 13px; padding: 8px 18px;
  border-radius: var(--r-pill); border: 1px solid var(--line); background: var(--card);
  color: var(--ink-soft); cursor: pointer; transition: all 200ms var(--ease-out);
}
.r-chip:hover { border-color: var(--accent); color: var(--accent-deep); }
.r-chip.is-on { background: var(--accent); border-color: var(--accent); color: #FFF8F2; font-weight: 600; }

/* One-line takeaway */
.r-takeaway { max-width: 480px; margin: 0 auto 22px; text-align: left; }
.r-takeaway__label {
  display: block; font-family: var(--mono); font-size: 10px; letter-spacing: 0.18em;
  text-transform: uppercase; color: var(--ink-soft); margin-bottom: 8px; text-align: center;
}
.r-takeaway__input {
  width: 100%; resize: vertical; min-height: 56px; padding: 12px 14px;
  font-family: var(--serif); font-size: 15px; line-height: 1.6; color: var(--ink);
  background: var(--card); border: 1px solid var(--line); border-radius: var(--r-sm);
  outline: none; transition: border-color 200ms var(--ease-out);
}
.r-takeaway__input:focus { border-color: var(--accent); }
.r-takeaway__saved { text-align: center; margin-top: 8px; font-size: 12px; color: var(--sage); }

/* Reader font-size scale */
.reader.fs-sm .r-body-prose { font-size: 15.5px; }
.reader.fs-sm .r-idea__detail { font-size: 14.5px; }
.reader.fs-sm .r-quote { font-size: clamp(20px, 4.6vw, 28px); }
.reader.fs-lg .r-body-prose { font-size: 18.5px; line-height: 1.95; }
.reader.fs-lg .r-idea__detail { font-size: 17.5px; line-height: 1.9; }
.reader.fs-lg .r-idea__title { font-size: clamp(22px, 5vw, 29px); }
.reader.fs-lg .r-quote { font-size: clamp(24px, 5.6vw, 36px); }
.reader.fs-lg .r-idea__apply-text, .reader.fs-lg .r-actions__hint { font-size: 15.5px; }

/* Eye-care (warm cream) */
.reader.eye-care { background-color: #F1E7CE; }
.reader.eye-care::before { background: linear-gradient(180deg, rgba(241,231,206,.84), rgba(241,231,206,.74)); }
.reader.eye-care .reader__top, .reader.eye-care .reader__nav { background: rgba(241,231,206,.8); }

/* Dark (scoped token override) */
.reader.dark {
  --ink: #ECE4D6; --ink-soft: #B4A993; --ink-ghost: #857B6B;
  --paper: #211C17; --panel: #2A241D; --card: #2C261E; --paper-warm: #332B20;
  --line: rgba(236,228,214,.13);
  background-color: #211C17; background-image: none; color: var(--ink);
}
.reader.dark::before { background: radial-gradient(120% 70% at 50% 0%, rgba(217,119,87,.12), transparent 60%); }
.reader.dark .reader__top, .reader.dark .reader__nav { background: rgba(33,28,23,.82); }
.reader.dark .reader__progress { background: rgba(236,228,214,.14); }
.reader.dark .r-recall__veil { background: rgba(40,34,27,.6); }
.reader.dark .r-takeaway__input { background: var(--panel); }
.reader.dark .reader__nav-btn--prev { color: var(--ink-soft); border-color: var(--line); }
.reader.dark .checklist__check { accent-color: var(--accent); }

/* Pick-card read status badge */
.pick-card__badge {
  position: absolute; top: 10px; right: 10px; z-index: 2;
  font-family: var(--mono); font-size: 10px; letter-spacing: 0.06em;
  padding: 4px 9px; border-radius: var(--r-pill);
}
.pick-card__badge--done { background: rgba(122,139,111,.94); color: #F4F6F1; }
.pick-card__badge--active { background: rgba(217,119,87,.94); color: #FFF8F2; }

/* Shelf reading stats */
.read-stats {
  background: var(--card); border: 1px solid var(--line); border-radius: var(--r-lg);
  padding: var(--s-5); margin: var(--s-4) 0 var(--s-6);
  display: flex; flex-direction: column; gap: var(--s-4);
}
.read-stats__main { display: flex; align-items: center; gap: var(--s-6); flex-wrap: wrap; }
.read-stats__streak { display: flex; align-items: baseline; gap: 8px; }
.read-stats__streak strong { font-family: var(--serif); font-size: 40px; line-height: 1; color: var(--accent-deep); }
.read-stats__streak span { font-size: 13px; color: var(--ink-soft); }
.read-stats__grid { display: flex; gap: var(--s-5); flex-wrap: wrap; margin-left: auto; }
.read-stats__grid > div { display: flex; flex-direction: column; gap: 2px; }
.read-stats__grid strong { font-family: var(--serif); font-size: 20px; color: var(--ink); }
.read-stats__grid span { font-size: 11px; color: var(--ink-soft); letter-spacing: 0.04em; white-space: nowrap; }
.read-heat__label {
  font-family: var(--mono); font-size: 10px; letter-spacing: 0.16em;
  text-transform: uppercase; color: var(--ink-soft); margin-bottom: 8px;
}
.read-heat__grid { display: grid; grid-template-columns: repeat(35, 1fr); gap: 4px; }
.heat { aspect-ratio: 1; border-radius: 3px; background: var(--panel); }
.heat--1 { background: rgba(217,119,87,.32); }
.heat--2 { background: rgba(217,119,87,.62); }
.heat--3 { background: var(--accent); }
@media (max-width: 640px) {
  .read-stats { padding: var(--s-4); }
  .read-stats__main { gap: var(--s-4); }
  .read-stats__grid { margin-left: 0; width: 100%; justify-content: space-between; gap: var(--s-3); }
  .read-heat__grid { gap: 3px; }
}

/* Shelf reading journal */
.read-note-list { display: flex; flex-direction: column; gap: var(--s-4); }
.read-note { background: var(--card); border: 1px solid var(--line); border-radius: var(--r-lg); padding: var(--s-4) var(--s-5); }
.read-note__head { display: flex; align-items: center; gap: var(--s-3); margin-bottom: 12px; color: inherit; }
.read-note__head .cover { width: 40px; height: 56px; border-radius: 3px; flex-shrink: 0; }
.read-note__title { font-family: var(--serif); font-weight: 600; font-size: 16px; color: var(--ink); }
.read-note__meta { font-size: 12px; color: var(--ink-soft); margin-top: 2px; }
.read-note__tag {
  margin-left: auto; font-family: var(--mono); font-size: 10px; letter-spacing: 0.08em;
  color: var(--sage); border: 1px solid rgba(122,139,111,.4); padding: 3px 9px;
  border-radius: var(--r-pill); flex-shrink: 0;
}
.read-note__takeaway {
  font-family: var(--serif); font-size: 15px; line-height: 1.7; color: var(--ink);
  border-left: 3px solid var(--accent); padding: 4px 0 4px 14px; margin: 0 0 10px;
}
.read-note__quote {
  font-family: var(--serif); font-size: 14px; line-height: 1.6; color: var(--ink-soft);
  padding: 8px 0 8px 14px; border-left: 2px solid var(--line); margin: 0 0 8px;
}

/* Detail: my reading notes */
.my-notes {
  background: linear-gradient(180deg, rgba(217,119,87,.05), rgba(217,119,87,.02));
  border: 1px solid rgba(217,119,87,.25); border-radius: var(--r-lg); padding: var(--s-5);
}
.my-notes__takeaway {
  font-family: var(--serif); font-size: 17px; line-height: 1.7; color: var(--ink);
  border-left: 3px solid var(--accent); padding-left: 14px; margin: 0 0 12px;
}
.my-notes__quote {
  font-family: var(--serif); font-size: 14.5px; line-height: 1.6; color: var(--ink-soft);
  padding-left: 14px; border-left: 2px solid var(--line); margin: 0 0 8px;
}

/* ============================================================
   问一问 (ask.js) — 精读中的提问抽屉
   挂在 #reader 内，因此自动继承 .reader.dark 的令牌覆盖。
   ============================================================ */

/* 步骤末尾的入口胶囊 */
.ask-trigger-wrap { display: flex; justify-content: center; margin-top: 30px; }
.ask-trigger {
  display: inline-flex; align-items: center; gap: 7px;
  font-family: var(--sans); font-size: 13px; font-weight: 500;
  padding: 9px 18px; border-radius: var(--r-pill);
  border: 1px solid rgba(217, 119, 87, .32); background: var(--accent-soft);
  color: var(--accent-deep); cursor: pointer;
  transition: all 220ms var(--ease-out);
}
.ask-trigger:hover { background: var(--accent); border-color: var(--accent); color: #FFF8F2; }
.ask-trigger:active { transform: scale(0.97); }
.ask-trigger svg { width: 15px; height: 15px; }

/* 抽屉容器 */
.ask { position: fixed; inset: 0; z-index: 120; }
.ask[hidden] { display: none; }
.ask__scrim { position: absolute; inset: 0; background: rgba(25, 25, 23, .34); }
.ask__panel {
  position: absolute; left: 0; right: 0; bottom: 0;
  max-height: 76vh; display: flex; flex-direction: column;
  background: var(--card); border-top: 1px solid var(--line);
  border-radius: var(--r-lg) var(--r-lg) 0 0;
  box-shadow: 0 -18px 48px -24px rgba(25, 25, 23, .42);
  padding-bottom: env(safe-area-inset-bottom);
}
@media (min-width: 768px) {
  /* 用负 margin 居中而非 translateX，避免和 GSAP 的 yPercent 出场动画抢 transform */
  .ask__panel { left: 50%; right: auto; width: 620px; margin-left: -310px; max-height: 70vh; }
}
.ask__grip {
  width: 34px; height: 4px; border-radius: var(--r-pill); background: var(--line);
  margin: 8px auto 0; flex-shrink: 0;
}

/* 抽屉头部 */
.ask__head {
  display: flex; align-items: center; justify-content: space-between; gap: 12px;
  padding: 12px 18px 8px; flex-shrink: 0;
}
.ask__eyebrow {
  font-family: var(--mono); font-size: 10px; letter-spacing: 0.18em;
  text-transform: uppercase; color: var(--accent-deep);
  overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
}
.ask__head-right { display: flex; align-items: center; gap: 8px; flex-shrink: 0; }
.ask__wipe {
  font-family: var(--sans); font-size: 12px; color: var(--ink-soft);
  border: 1px solid var(--line); background: transparent;
  padding: 4px 11px; border-radius: var(--r-pill); cursor: pointer;
  transition: all 200ms var(--ease-out);
}
.ask__wipe:hover { color: var(--accent-deep); border-color: var(--accent); }
.ask__close {
  width: 30px; height: 30px; display: grid; place-items: center;
  border: 1px solid var(--line); border-radius: 50%; background: transparent;
  color: var(--ink-soft); cursor: pointer; transition: all 200ms var(--ease-out);
}
.ask__close:hover { color: var(--accent-deep); border-color: var(--accent); }
.ask__close svg { width: 15px; height: 15px; }
.ask__ctx {
  padding: 0 18px 10px; font-size: 12px; line-height: 1.5; color: var(--ink-soft);
  border-bottom: 1px solid var(--line); flex-shrink: 0;
}
.ask__ctx[hidden] { display: none; }

/* 对话区 */
.ask__log {
  flex: 1; overflow-y: auto; -webkit-overflow-scrolling: touch;
  padding: 16px 18px 4px; display: flex; flex-direction: column; gap: 14px;
  min-height: 96px;
}
.ask__empty {
  font-family: var(--serif); font-size: 14px; line-height: 1.8; color: var(--ink-soft);
  background: var(--paper-warm); border-left: 3px solid var(--accent);
  border-radius: 0 var(--r-sm) var(--r-sm) 0; padding: 12px 14px;
}

/* 消息：读者用浅陶土气泡，回答走衬线正文（像书页批注，不套气泡） */
.ask__msg { white-space: pre-wrap; word-break: break-word; }
.ask__msg--me {
  align-self: flex-end; max-width: 86%;
  font-family: var(--sans); font-size: 14px; line-height: 1.65; color: var(--ink);
  background: var(--accent-soft); border: 1px solid rgba(217, 119, 87, .2);
  border-radius: var(--r-md) var(--r-md) var(--r-xs) var(--r-md);
  padding: 9px 13px;
}
.ask__msg--ai {
  font-family: var(--serif); font-size: 15.5px; line-height: 1.85; color: var(--ink);
  padding-left: 12px; border-left: 2px solid var(--line);
}

/* 正在生成 */
.ask__typing { display: flex; align-items: center; gap: 5px; min-height: 24px; }
.ask__typing i {
  width: 5px; height: 5px; border-radius: 50%; background: var(--accent);
  opacity: .35; animation: ask-blink 1.1s var(--ease-in-out) infinite;
}
.ask__typing i:nth-child(2) { animation-delay: .18s; }
.ask__typing i:nth-child(3) { animation-delay: .36s; }
@keyframes ask-blink { 0%, 100% { opacity: .28; } 50% { opacity: 1; } }

/* 错误行：灰字 + 重试，不弹窗不恐吓 */
.ask__err {
  display: flex; align-items: center; gap: 10px;
  font-size: 12.5px; color: var(--ink-soft);
}
.ask__retry {
  font-family: var(--sans); font-size: 12px; color: var(--accent-deep);
  border: 1px solid rgba(217, 119, 87, .32); background: transparent;
  padding: 3px 12px; border-radius: var(--r-pill); cursor: pointer;
  transition: all 200ms var(--ease-out);
}
.ask__retry:hover { background: var(--accent-soft); }

/* 输入区 */
.ask__compose {
  display: flex; align-items: flex-end; gap: 10px;
  padding: 12px 18px 14px; border-top: 1px solid var(--line); flex-shrink: 0;
}
.ask__input {
  flex: 1; resize: none; max-height: 116px; min-height: 40px;
  padding: 10px 13px; font-family: var(--serif); font-size: 15px; line-height: 1.6;
  color: var(--ink); background: var(--paper); border: 1px solid var(--line);
  border-radius: var(--r-md); outline: none;
  transition: border-color 200ms var(--ease-out);
}
.ask__input:focus { border-color: var(--accent); }
.ask__input::placeholder { color: var(--ink-faint); }
.ask__send {
  width: 40px; height: 40px; flex-shrink: 0; display: grid; place-items: center;
  border: 0; border-radius: 50%; background: var(--accent); color: #FFF8F2;
  cursor: pointer; transition: all 200ms var(--ease-out);
}
.ask__send:hover { background: var(--accent-deep); }
.ask__send:active { transform: scale(0.94); }
.ask__send.is-busy { background: var(--ink-soft); }
.ask__send svg { width: 18px; height: 18px; }

/* 精读的护眼 / 深色底色（.reader.dark 的令牌覆盖已自动继承） */
.reader.eye-care .ask__panel { background: #F6EEDA; }
.reader.eye-care .ask__input { background: #FBF6E9; }
.reader.dark .ask__panel { background: var(--panel); }
.reader.dark .ask__input { background: var(--card); }
.reader.dark .ask__scrim { background: rgba(12, 10, 8, .5); }

/* 精读字号档位联动 */
.reader.fs-sm .ask__msg--ai { font-size: 14.5px; }
.reader.fs-lg .ask__msg--ai { font-size: 17px; line-height: 1.9; }
.reader.fs-lg .ask__input { font-size: 16.5px; }