:root {
  --xuan: #f7f4eb;
  --xuan-dark: #161513;
  --cinnabar: #c83c23;
  --bamboo: #2d5a49;
  --gold: #c5a059;
  --ink: #2c2c2c;
  --ink-light: #8c8c8c;
  --panel: rgba(255, 255, 255, 0.92);
  --panel-dark: rgba(28, 27, 24, 0.72);
  --font-serif: "Noto Serif SC", "Songti SC", "SimSun", serif;
  --font-callig: "Ma Shan Zheng", "KaiTi", cursive;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--font-serif);
  color: var(--ink);
  background-color: var(--xuan);
  background-image:
    radial-gradient(ellipse 80% 50% at 10% -10%, rgba(197, 160, 89, 0.18), transparent),
    radial-gradient(ellipse 60% 40% at 100% 0%, rgba(200, 60, 35, 0.08), transparent),
    radial-gradient(#e8e2d5 1px, transparent 0);
  background-size: auto, auto, 24px 24px;
  display: flex;
  flex-direction: column;
  transition: background-color 0.4s, color 0.4s;
}

html.dark body {
  color: #e8e4d9;
  background-color: var(--xuan-dark);
  background-image:
    radial-gradient(ellipse 80% 50% at 10% -10%, rgba(197, 160, 89, 0.12), transparent),
    radial-gradient(ellipse 60% 40% at 100% 0%, rgba(45, 90, 73, 0.15), transparent),
    radial-gradient(#282622 1px, transparent 0);
  background-size: auto, auto, 24px 24px;
}

::selection { background: var(--cinnabar); color: #fff; }

::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-thumb { background: var(--gold); border-radius: 3px; }

.writing-vertical {
  writing-mode: vertical-rl;
  text-orientation: mixed;
  max-height: 360px;
}

@keyframes float-up {
  0% { opacity: 1; transform: translateY(0) scale(1); }
  100% { opacity: 0; transform: translateY(-40px) scale(1.2); }
}
.animate-float-up { animation: float-up 1s ease-out forwards; }

@keyframes coin-spin-front {
  0% { transform: rotateY(0deg) translateY(0); }
  42% { transform: rotateY(880deg) translateY(-40px); }
  100% { transform: rotateY(1440deg) translateY(0); }
}
@keyframes coin-spin-back {
  0% { transform: rotateY(0deg) translateY(0); }
  42% { transform: rotateY(900deg) translateY(-40px); }
  100% { transform: rotateY(1620deg) translateY(0); }
}
@keyframes fish-ripple {
  0% { transform: scale(0.55); opacity: 0.55; }
  100% { transform: scale(1.85); opacity: 0; }
}

@keyframes fade-in {
  from { opacity: 0; transform: translateY(6px); }
  to { opacity: 1; transform: none; }
}
.animate-fade-in { animation: fade-in 0.45s ease both; }

@keyframes pulse-soft {
  0%, 100% { opacity: 0.55; }
  50% { opacity: 1; }
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 40;
  backdrop-filter: blur(12px);
  background: color-mix(in srgb, var(--xuan) 82%, transparent);
  border-bottom: 1px solid color-mix(in srgb, var(--gold) 35%, transparent);
  padding: 0.75rem 1rem;
}
html.dark .site-header {
  background: color-mix(in srgb, var(--xuan-dark) 82%, transparent);
}

.header-inner {
  max-width: 72rem;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  cursor: pointer;
  border: none;
  background: none;
  padding: 0;
  color: inherit;
  font: inherit;
}
.brand-mark {
  width: 2.5rem;
  height: 2.5rem;
  border-radius: 999px;
  background: var(--cinnabar);
  color: #fff;
  display: grid;
  place-items: center;
  font-family: var(--font-callig);
  font-size: 1.5rem;
  box-shadow: 0 4px 14px rgba(200, 60, 35, 0.25);
}
.brand h1 {
  margin: 0;
  font-family: var(--font-callig);
  font-size: 1.5rem;
  letter-spacing: 0.2em;
  font-weight: 400;
}
.brand p {
  margin: 0;
  font-size: 0.7rem;
  color: var(--ink-light);
  letter-spacing: 0.12em;
}

.nav-desktop {
  display: none;
  gap: 1.5rem;
  font-size: 0.85rem;
  letter-spacing: 0.18em;
}
@media (min-width: 768px) {
  .nav-desktop { display: flex; }
}

.nav-btn {
  background: none;
  border: none;
  border-bottom: 2px solid transparent;
  padding: 0.25rem 0;
  cursor: pointer;
  color: inherit;
  font: inherit;
  letter-spacing: inherit;
  transition: color 0.2s, border-color 0.2s;
}
.nav-btn:hover { color: var(--cinnabar); }
.nav-btn.active {
  color: var(--cinnabar);
  border-bottom-color: var(--cinnabar);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.icon-btn, .chip-btn, .btn {
  cursor: pointer;
  font-family: inherit;
  transition: 0.2s ease;
}
.icon-btn {
  border: none;
  background: transparent;
  padding: 0.5rem;
  border-radius: 999px;
  color: inherit;
}
.icon-btn:hover { background: color-mix(in srgb, var(--gold) 15%, transparent); }
.chip-btn {
  border: 1px solid var(--cinnabar);
  color: var(--cinnabar);
  background: transparent;
  border-radius: 999px;
  padding: 0.35rem 0.75rem;
  font-size: 0.75rem;
  letter-spacing: 0.12em;
}
.chip-btn:hover { background: var(--cinnabar); color: #fff; }

.btn {
  border: none;
  border-radius: 0.6rem;
  padding: 0.65rem 1rem;
  font-size: 0.875rem;
}
.btn-primary { background: var(--cinnabar); color: #fff; }
.btn-primary:hover { filter: brightness(0.95); }
.btn-primary:disabled {
  opacity: 0.45;
  cursor: not-allowed;
  filter: none;
}
.btn-gold { background: var(--gold); color: var(--ink); font-weight: 600; }
.btn-outline {
  background: transparent;
  border: 1px solid color-mix(in srgb, currentColor 35%, transparent);
  color: inherit;
}
.btn-ghost {
  background: transparent;
  border: 1px solid #ccc;
  color: var(--ink-light);
  font-size: 0.75rem;
}
html.dark .btn-ghost { border-color: #444; }

main {
  flex: 1;
  width: 100%;
  max-width: 72rem;
  margin: 0 auto;
  padding: 1.5rem 1rem 3rem;
}

.tab-content { display: none; animation: fade-in 0.4s ease; }
.tab-content.active { display: block; }

.hero {
  position: relative;
  overflow: hidden;
  border-radius: 1.1rem;
  padding: 2rem 1.5rem;
  color: var(--xuan);
  border: 1px solid color-mix(in srgb, var(--gold) 40%, transparent);
  background:
    linear-gradient(120deg, rgba(28, 27, 24, 0.94), rgba(45, 90, 73, 0.78)),
    radial-gradient(circle at 80% 20%, rgba(197, 160, 89, 0.35), transparent 45%);
  box-shadow: 0 18px 40px rgba(28, 27, 24, 0.18);
}
@media (min-width: 768px) {
  .hero { padding: 3rem 2.5rem; }
}
.hero-watermark {
  position: absolute;
  right: -0.5rem;
  bottom: -1rem;
  font-family: var(--font-callig);
  font-size: clamp(4rem, 12vw, 7rem);
  opacity: 0.1;
  pointer-events: none;
  user-select: none;
}
.hero-badge {
  display: inline-block;
  padding: 0.25rem 0.7rem;
  background: color-mix(in srgb, var(--cinnabar) 85%, transparent);
  border-radius: 999px;
  font-size: 0.7rem;
  letter-spacing: 0.16em;
  margin-bottom: 1rem;
}
.hero h2 {
  margin: 0 0 1rem;
  font-family: var(--font-callig);
  font-size: clamp(1.8rem, 4vw, 3rem);
  font-weight: 400;
  letter-spacing: 0.12em;
  line-height: 1.35;
}
.hero h2 span { color: var(--gold); }
.hero p {
  margin: 0;
  max-width: 36rem;
  color: #d5d0c4;
  line-height: 1.8;
  font-size: 0.95rem;
}
.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1.5rem;
}

.grid-3 {
  display: grid;
  gap: 1.25rem;
  margin-top: 2rem;
}
@media (min-width: 768px) {
  .grid-3 { grid-template-columns: repeat(3, 1fr); }
}

.feature-card, .panel, .classic-card, .hex-card {
  background: var(--panel);
  border: 1px solid color-mix(in srgb, var(--gold) 28%, transparent);
  border-radius: 0.9rem;
  padding: 1.25rem;
  box-shadow: 0 6px 18px rgba(44, 44, 44, 0.04);
}
html.dark .feature-card,
html.dark .panel,
html.dark .classic-card,
html.dark .hex-card {
  background: var(--panel-dark);
}

.feature-card {
  cursor: pointer;
  transition: border-color 0.25s, transform 0.25s, box-shadow 0.25s;
}
.feature-card:hover {
  border-color: var(--cinnabar);
  transform: translateY(-2px);
  box-shadow: 0 12px 28px rgba(44, 44, 44, 0.08);
}
.feature-icon {
  width: 2.75rem;
  height: 2.75rem;
  border-radius: 0.65rem;
  display: grid;
  place-items: center;
  margin-bottom: 0.85rem;
  font-size: 1.25rem;
}
.feature-card h3 {
  margin: 0 0 0.5rem;
  font-size: 1.1rem;
  letter-spacing: 0.12em;
}
.feature-card p {
  margin: 0 0 0.85rem;
  font-size: 0.8rem;
  color: var(--ink-light);
  line-height: 1.7;
}
.feature-link {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--cinnabar);
}

.daily-quote {
  margin-top: 2rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
  align-items: center;
  justify-content: space-between;
  padding: 1.25rem;
  border-radius: 0.9rem;
  border: 1px solid color-mix(in srgb, var(--gold) 35%, transparent);
  background: linear-gradient(135deg, color-mix(in srgb, var(--gold) 12%, transparent), transparent 55%);
}
@media (min-width: 768px) {
  .daily-quote {
    flex-direction: row;
    text-align: left;
  }
}
.daily-quote .label {
  font-size: 0.7rem;
  color: var(--cinnabar);
  letter-spacing: 0.18em;
  font-weight: 700;
}
.daily-quote blockquote {
  margin: 0.4rem 0;
  font-size: 1.1rem;
  font-style: italic;
}
.daily-quote .source {
  margin: 0;
  font-size: 0.75rem;
  color: var(--ink-light);
}

.section-head {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  justify-content: space-between;
  border-bottom: 1px solid color-mix(in srgb, var(--gold) 30%, transparent);
  padding-bottom: 1rem;
  margin-bottom: 1.5rem;
}
@media (min-width: 768px) {
  .section-head { flex-direction: row; align-items: flex-end; }
}
.section-head h2 {
  margin: 0;
  font-family: var(--font-callig);
  font-size: 1.6rem;
  letter-spacing: 0.14em;
  font-weight: 400;
}
.section-head p {
  margin: 0.35rem 0 0;
  font-size: 0.8rem;
  color: var(--ink-light);
}
.subtabs, .filter-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
}
.subtab, .filter-btn {
  border: none;
  border-radius: 0.55rem;
  padding: 0.4rem 0.85rem;
  font-size: 0.75rem;
  cursor: pointer;
  background: color-mix(in srgb, var(--gold) 18%, transparent);
  color: inherit;
  font-family: inherit;
}
.subtab.active, .filter-btn.active {
  background: var(--cinnabar);
  color: #fff;
}

.layout-2 {
  display: grid;
  gap: 1.25rem;
}
@media (min-width: 1024px) {
  .layout-2 { grid-template-columns: 5fr 7fr; }
}

.iching-left-col {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}
.iching-ai-panel {
  text-align: center;
}
.iching-ai-panel .ai-box {
  margin-top: 0.85rem;
  text-align: left;
}

.center-stack {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: 1rem;
}

.status-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.35rem 0.75rem;
  border-radius: 999px;
  font-size: 0.75rem;
  background: color-mix(in srgb, var(--gold) 15%, transparent);
  border: 1px solid color-mix(in srgb, var(--gold) 30%, transparent);
}
.status-pill.ok { color: var(--bamboo); }
.status-pill.locked { color: var(--cinnabar); }

.coins {
  display: flex;
  gap: 1.1rem;
  justify-content: center;
  perspective: 760px;
}
.coin {
  width: 5.4rem;
  height: 5.4rem;
  position: relative;
}
.coin::after {
  content: "";
  position: absolute;
  left: 14%;
  right: 14%;
  bottom: -0.28rem;
  height: 0.65rem;
  border-radius: 50%;
  background: rgba(62, 42, 12, 0.28);
  filter: blur(4px);
  z-index: -1;
  pointer-events: none;
}
.coin-inner {
  width: 100%;
  height: 100%;
  position: relative;
  transform-style: preserve-3d;
  -webkit-transform-style: preserve-3d;
}
.coin-face {
  position: absolute;
  inset: 0;
  backface-visibility: hidden;
  -webkit-backface-visibility: hidden;
}
.coin-face img {
  width: 100%;
  height: 100%;
  display: block;
  pointer-events: none;
  object-fit: contain;
  -webkit-user-drag: none;
  user-select: none;
}
.coin-front { transform: rotateY(0deg); }
.coin-back { transform: rotateY(180deg); }
.coin.is-back .coin-inner { transform: rotateY(180deg); }
.coin.spin-front .coin-inner {
  animation: coin-spin-front 0.85s cubic-bezier(0.33, 0.1, 0.25, 1);
}
.coin.spin-back .coin-inner {
  animation: coin-spin-back 0.85s cubic-bezier(0.33, 0.1, 0.25, 1);
}
.coin-legend {
  margin: 0.4rem 0 0;
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  color: var(--ink-light);
}
html.dark .coin-face img {
  filter: brightness(1.12) saturate(1.05);
}

.yao-stack {
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  gap: 0.65rem;
  max-width: 18rem;
  margin: 1.25rem auto;
  min-height: 14rem;
}
.yao-placeholder {
  height: 1.5rem;
  border: 2px dashed #ddd;
  border-radius: 0.35rem;
  display: grid;
  place-items: center;
  font-size: 0.7rem;
  color: #aaa;
}
html.dark .yao-placeholder { border-color: #444; color: #777; }
.yao-yang {
  height: 1.5rem;
  background: var(--cinnabar);
  color: #fff;
  border-radius: 0.35rem;
  display: grid;
  place-items: center;
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.08em;
}
.yao-yin {
  height: 1.5rem;
  display: flex;
  gap: 0.5rem;
}
.yao-yin span {
  flex: 1;
  background: var(--ink);
  border-radius: 0.35rem;
}
html.dark .yao-yin span { background: #d8d2c4; }
.yao-yin .gap { flex: 0 0 1rem; background: transparent !important; }

.result-box {
  margin-top: 1rem;
  padding: 1rem;
  border-radius: 0.7rem;
  border: 1px solid color-mix(in srgb, var(--gold) 35%, transparent);
  background: color-mix(in srgb, var(--xuan) 70%, transparent);
  display: none;
}
html.dark .result-box {
  background: color-mix(in srgb, var(--xuan-dark) 70%, transparent);
}
.result-box.show { display: block; }
.ai-box {
  margin-top: 0.75rem;
  padding-top: 0.75rem;
  border-top: 1px solid color-mix(in srgb, var(--gold) 25%, transparent);
  white-space: normal;
  font-size: 0.8rem;
  line-height: 1.8;
  color: var(--bamboo);
}
html.dark .ai-box { color: #8fbfa8; }
.ai-box-label {
  font-weight: 700;
  margin-bottom: 0.65rem;
  letter-spacing: 0.08em;
  color: var(--gold);
}
.markdown-body p {
  margin: 0 0 0.85rem;
}
.markdown-body p:last-child {
  margin-bottom: 0;
}
.markdown-body strong {
  color: var(--cinnabar);
  font-weight: 700;
}
html.dark .markdown-body strong {
  color: #d4846f;
}
.markdown-body em {
  font-style: italic;
}
.markdown-body code {
  padding: 0.1rem 0.35rem;
  border-radius: 0.25rem;
  background: color-mix(in srgb, var(--gold) 12%, transparent);
  font-family: ui-monospace, monospace;
  font-size: 0.92em;
}
.markdown-body ul,
.markdown-body ol {
  margin: 0 0 0.85rem;
  padding-left: 1.2rem;
}
.markdown-body li + li {
  margin-top: 0.35rem;
}
.markdown-body h3,
.markdown-body h4 {
  margin: 0 0 0.55rem;
  font-size: 0.88rem;
  color: var(--cinnabar);
  letter-spacing: 0.06em;
}
.markdown-body.plain-body {
  white-space: pre-wrap;
}

.ai-interpret-entry {
  margin-top: 0.85rem;
  display: flex;
  justify-content: center;
}
.ai-interpret-btn {
  padding: 0.45rem 1.1rem;
  font-size: 0.78rem;
  letter-spacing: 0.12em;
}
.ai-interpret-btn:disabled {
  opacity: 0.55;
  cursor: not-allowed;
}
.buddhist-ai-box {
  margin-top: 1rem;
  text-align: left;
}
.ai-interpret-entry.hidden,
.ai-box.hidden,
.buddhist-ai-box.hidden { display: none; }

.follow-modal-card {
  max-width: 22rem;
  text-align: center;
}
.follow-modal-head {
  justify-content: center;
  border: none;
  padding-bottom: 0;
}
.follow-modal-kicker {
  font-size: 0.75rem;
  letter-spacing: 0.18em;
  color: var(--gold);
}
.follow-modal-body {
  padding-top: 0.35rem;
  white-space: normal;
}
.follow-modal-tip {
  margin: 0 0 1rem;
  font-size: 0.82rem;
  color: var(--ink-light);
  line-height: 1.75;
}
.follow-qrcode {
  width: min(12rem, 72vw);
  height: auto;
  border-radius: 0.55rem;
  border: 1px solid color-mix(in srgb, var(--gold) 35%, transparent);
  box-shadow: 0 8px 24px rgba(42, 20, 8, 0.12);
}
html.dark .follow-qrcode {
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.35);
}
.follow-modal-foot {
  justify-content: center;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.fish-wrap {
  position: relative;
  cursor: pointer;
  user-select: none;
  outline: none;
  touch-action: manipulation;
  perspective: 520px;
  perspective-origin: 50% 28%;
  --mallet-x: 78%;
  --mallet-y: 14%;
}
@media (hover: hover) and (pointer: fine) {
  .fish-wrap { cursor: none; }
}
.fish-wrap:focus-visible {
  border-radius: 1.2rem;
  box-shadow: 0 0 0 2px var(--gold);
}
.fish-stage {
  position: relative;
  width: 16.5rem;
  height: 16.5rem;
}
.fish-art {
  width: 16.5rem;
  height: auto;
  display: block;
  user-select: none;
  -webkit-user-drag: none;
  pointer-events: none;
  filter: drop-shadow(0 10px 14px rgba(42, 20, 8, 0.22));
}
.mallet-art {
  position: absolute;
  left: var(--mallet-x);
  top: var(--mallet-y);
  width: auto;
  height: 8.2rem;
  z-index: 4;
  transform-origin: 50% 12%;
  transform: translate3d(-50%, -12%, 10px) rotateX(-4deg) scale(1.04);
  pointer-events: none;
  filter: drop-shadow(0 10px 10px rgba(42, 20, 8, 0.3));
  transition: left 0.35s ease, top 0.35s ease, transform 0.22s ease, filter 0.22s ease;
  user-select: none;
  -webkit-user-drag: none;
  transform-style: preserve-3d;
  will-change: transform;
}
.fish-wrap.is-aiming .mallet-art {
  transition: transform 0.14s ease, filter 0.14s ease;
  transform: translate3d(-50%, -13%, 18px) rotateX(-6deg) scale(1.08);
  filter: drop-shadow(0 14px 12px rgba(42, 20, 8, 0.34));
}
.fish-ripple {
  position: absolute;
  left: 50%;
  top: 52%;
  width: 5.5rem;
  height: 5.5rem;
  margin: -2.75rem 0 0 -2.75rem;
  border-radius: 50%;
  border: 1.5px solid var(--gold);
  opacity: 0;
  pointer-events: none;
}
.fish-wrap.is-striking .mallet-art {
  transform: translate3d(-50%, 2%, -6px) rotateX(8deg) scale(0.94);
  filter: drop-shadow(0 6px 6px rgba(42, 20, 8, 0.24));
  transition-duration: 0.14s;
  transition-timing-function: ease-out;
}
.fish-wrap.is-striking .fish-ripple {
  animation: fish-ripple 0.48s ease-out;
}
html.dark .fish-art,
html.dark .mallet-art {
  filter: brightness(1.08) drop-shadow(0 10px 14px rgba(0, 0, 0, 0.45));
}

@media (max-width: 768px), (hover: none) and (pointer: coarse) {
  .mallet-art { display: none; }
}
@media (max-width: 480px) {
  .coin { width: 4.5rem; height: 4.5rem; }
  .coins { gap: 0.7rem; }
  .fish-stage,
  .fish-art { width: 14rem; }
  .fish-stage { height: 14rem; }
}
.karma {
  font-family: var(--font-callig);
  font-size: 1.8rem;
  color: var(--bamboo);
}

.verse-panel {
  display: flex;
  flex-direction: column;
  justify-content: center;
  min-height: 22rem;
  text-align: center;
  background-image:
    linear-gradient(180deg, color-mix(in srgb, var(--gold) 8%, transparent), transparent 28%),
    radial-gradient(ellipse at 50% 110%, color-mix(in srgb, var(--bamboo) 8%, transparent), transparent 46%);
}
.verse-kicker {
  font-size: 0.75rem;
  letter-spacing: 0.22em;
  color: var(--bamboo);
}
.verse-body {
  margin: 1.4rem 0 1rem;
  padding: 0.4rem 0.6rem;
  max-height: 16rem;
  overflow: auto;
  font-size: 1.12rem;
  line-height: 2.05;
  letter-spacing: 0.14em;
  color: var(--ink);
}
.verse-body.verse-idle {
  font-family: var(--font-callig);
  font-size: 1.35rem;
  color: var(--ink-light);
  letter-spacing: 0.18em;
}
.verse-source {
  font-style: normal;
  font-size: 0.82rem;
  letter-spacing: 0.16em;
  color: var(--cinnabar);
  min-height: 1.2em;
}
html.dark .verse-body { color: #e8e4d9; }
html.dark .verse-source { color: #e08a78; }

.field input,
.field select,
.field textarea {
  width: 100%;
  border: 1px solid color-mix(in srgb, var(--gold) 35%, transparent);
  border-radius: 0.5rem;
  padding: 0.5rem 0.65rem;
  background: transparent;
  color: inherit;
  font: inherit;
  font-size: 0.85rem;
}

.grid-books {
  display: grid;
  gap: 1rem;
}
@media (min-width: 768px) {
  .grid-books { grid-template-columns: repeat(2, 1fr); }
}
@media (min-width: 1024px) {
  .grid-books { grid-template-columns: repeat(3, 1fr); }
}

.classic-card h3 {
  margin: 0;
  font-family: var(--font-callig);
  font-size: 1.35rem;
  font-weight: 400;
}
.classic-card .author {
  font-size: 0.7rem;
  color: var(--gold);
}
.classic-card p {
  font-size: 0.8rem;
  color: var(--ink-light);
  line-height: 1.7;
}
.classic-card blockquote {
  margin: 0.75rem 0;
  padding-left: 0.75rem;
  border-left: 2px solid var(--cinnabar);
  font-size: 0.8rem;
  color: var(--cinnabar);
  font-style: italic;
}

.upload-panel {
  margin-bottom: 1.25rem;
}
.upload-panel form {
  display: grid;
  gap: 0.65rem;
}
@media (min-width: 768px) {
  .upload-panel form {
    grid-template-columns: 1fr 1fr 1fr auto;
    align-items: end;
  }
  .upload-panel .span-2 { grid-column: span 2; }
}
.field label {
  display: block;
  font-size: 0.7rem;
  letter-spacing: 0.08em;
  margin-bottom: 0.25rem;
  color: var(--ink-light);
}

.hex-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0.75rem;
}
@media (min-width: 640px) { .hex-grid { grid-template-columns: repeat(3, 1fr); } }
@media (min-width: 768px) { .hex-grid { grid-template-columns: repeat(4, 1fr); } }
@media (min-width: 1024px) { .hex-grid { grid-template-columns: repeat(6, 1fr); } }
.hex-card {
  text-align: center;
  padding: 0.9rem 0.5rem;
  cursor: default;
}
.hex-card .sym { font-size: 1.75rem; color: var(--gold); }
.hex-card .nm { font-size: 0.85rem; font-weight: 700; margin-top: 0.25rem; }
.hex-card .jd {
  font-size: 0.65rem;
  color: var(--ink-light);
  margin-top: 0.25rem;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.modal {
  position: fixed;
  inset: 0;
  z-index: 50;
  display: grid;
  place-items: center;
  padding: 1rem;
  background: rgba(0,0,0,0.55);
  backdrop-filter: blur(4px);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.25s;
}
.modal.open {
  opacity: 1;
  pointer-events: auto;
}
.modal-card {
  width: min(42rem, 100%);
  max-height: 85vh;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  border-radius: 1rem;
  border: 1px solid color-mix(in srgb, var(--gold) 40%, transparent);
  background: var(--xuan);
}
html.dark .modal-card { background: var(--xuan-dark); }
.modal-head, .modal-foot {
  padding: 1rem 1.25rem;
  border-bottom: 1px solid color-mix(in srgb, var(--gold) 25%, transparent);
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
}
.modal-foot {
  border-bottom: none;
  border-top: 1px solid color-mix(in srgb, var(--gold) 25%, transparent);
}
.modal-body {
  padding: 1.25rem;
  overflow: auto;
  line-height: 1.9;
  white-space: pre-wrap;
  font-size: 0.95rem;
}

.site-footer {
  text-align: center;
  padding: 2rem 1rem;
  border-top: 1px solid color-mix(in srgb, var(--gold) 25%, transparent);
  font-size: 0.75rem;
  color: var(--ink-light);
}
.site-footer .quote {
  font-family: var(--font-callig);
  font-size: 1rem;
  color: var(--gold);
  margin-bottom: 0.5rem;
}

.mobile-nav {
  display: flex;
  justify-content: space-around;
  gap: 0.25rem;
  position: sticky;
  bottom: 0;
  z-index: 35;
  padding: 0.5rem;
  background: color-mix(in srgb, var(--xuan) 92%, transparent);
  border-top: 1px solid color-mix(in srgb, var(--gold) 30%, transparent);
  backdrop-filter: blur(10px);
}
html.dark .mobile-nav {
  background: color-mix(in srgb, var(--xuan-dark) 92%, transparent);
}
@media (min-width: 768px) {
  .mobile-nav { display: none; }
}
.mobile-nav button {
  flex: 1;
  border: none;
  background: transparent;
  color: inherit;
  font: inherit;
  font-size: 0.7rem;
  letter-spacing: 0.08em;
  padding: 0.45rem 0.25rem;
  border-radius: 0.5rem;
  cursor: pointer;
}
.mobile-nav button.active {
  color: var(--cinnabar);
  background: color-mix(in srgb, var(--cinnabar) 10%, transparent);
}

.toast {
  position: fixed;
  left: 50%;
  bottom: 5.5rem;
  transform: translateX(-50%) translateY(12px);
  z-index: 60;
  background: var(--ink);
  color: #fff;
  padding: 0.6rem 1rem;
  border-radius: 999px;
  font-size: 0.8rem;
  opacity: 0;
  pointer-events: none;
  transition: 0.25s ease;
  max-width: 90vw;
}
.toast.show {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

.hidden { display: none !important; }

body:not(.is-admin) .admin-only { display: none !important; }

.question-input {
  width: 100%;
  margin-top: 0.5rem;
}

/* —— 电子书阅读器 —— */
body.reader-open {
  overflow: hidden;
}
body.reader-open .mobile-nav {
  display: none !important;
}

.ebook-reader {
  position: fixed;
  inset: 0;
  z-index: 80;
  display: none;
  flex-direction: column;
  background: var(--xuan);
  color: var(--ink);
}
html.dark .ebook-reader {
  background: var(--xuan-dark);
  color: #e8e4d9;
}
.ebook-reader.open { display: flex; }

.reader-toolbar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  padding: 0.65rem 0.9rem;
  border-bottom: 1px solid color-mix(in srgb, var(--gold) 35%, transparent);
  background: color-mix(in srgb, var(--xuan) 92%, transparent);
  backdrop-filter: blur(10px);
}
html.dark .reader-toolbar {
  background: color-mix(in srgb, var(--xuan-dark) 92%, transparent);
}
.reader-toolbar-left,
.reader-toolbar-center,
.reader-toolbar-right {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}
.reader-toolbar h3 {
  margin: 0;
  font-family: var(--font-callig);
  font-size: 1.15rem;
  font-weight: 400;
  color: var(--cinnabar);
}
.reader-toolbar p {
  margin: 0;
  font-size: 0.7rem;
  color: var(--ink-light);
}
#reader-progress-label,
#reader-font-size {
  font-size: 0.8rem;
  min-width: 4rem;
  text-align: center;
  color: var(--ink-light);
}

.reader-main {
  flex: 1;
  display: flex;
  min-height: 0;
}

.reader-sidebar {
  width: 16.5rem;
  flex-shrink: 0;
  border-right: 1px solid color-mix(in srgb, var(--gold) 30%, transparent);
  display: flex;
  flex-direction: column;
  background: color-mix(in srgb, var(--gold) 6%, transparent);
  transition: margin 0.25s ease, width 0.25s ease;
}
.reader-sidebar.collapsed {
  margin-left: -16.5rem;
}
.reader-side-tabs {
  display: flex;
  border-bottom: 1px solid color-mix(in srgb, var(--gold) 25%, transparent);
}
.reader-side-tabs button {
  flex: 1;
  border: none;
  background: transparent;
  padding: 0.7rem;
  font: inherit;
  font-size: 0.8rem;
  letter-spacing: 0.1em;
  cursor: pointer;
  color: var(--ink-light);
}
.reader-side-tabs button.active {
  color: var(--cinnabar);
  box-shadow: inset 0 -2px 0 var(--cinnabar);
}
.reader-side-panel {
  flex: 1;
  overflow: auto;
  min-height: 0;
}
.reader-list {
  list-style: none;
  margin: 0;
  padding: 0.4rem;
}
.reader-list li button,
.bookmark-go {
  width: 100%;
  text-align: left;
  border: none;
  background: transparent;
  padding: 0.55rem 0.65rem;
  border-radius: 0.45rem;
  font: inherit;
  font-size: 0.8rem;
  color: inherit;
  cursor: pointer;
  line-height: 1.45;
}
.reader-list li button:hover,
.bookmark-go:hover,
.reader-list li button.active {
  background: color-mix(in srgb, var(--cinnabar) 10%, transparent);
  color: var(--cinnabar);
}
.reader-empty {
  padding: 1rem;
  font-size: 0.8rem;
  color: var(--ink-light);
  text-align: center;
}
.bookmark-item {
  display: flex;
  align-items: flex-start;
  gap: 0.25rem;
}
.bookmark-go {
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
}
.bookmark-go span {
  font-size: 0.65rem;
  color: var(--ink-light);
}
.bookmark-del {
  border: none;
  background: transparent;
  color: var(--ink-light);
  cursor: pointer;
  font-size: 1.1rem;
  padding: 0.35rem 0.5rem;
}
.bookmark-del:hover { color: var(--cinnabar); }

.reader-cache-box {
  border-top: 1px solid color-mix(in srgb, var(--gold) 25%, transparent);
  padding: 0.65rem;
  font-size: 0.7rem;
  color: var(--ink-light);
}
.reader-cache-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
  margin-top: 0.5rem;
}
.reader-cache-actions .btn {
  padding: 0.3rem 0.5rem;
  font-size: 0.7rem;
}

.reader-stage {
  flex: 1;
  position: relative;
  min-width: 0;
  display: flex;
  flex-direction: column;
  background:
    radial-gradient(ellipse at top, color-mix(in srgb, var(--gold) 8%, transparent), transparent 55%),
    var(--xuan);
}
html.dark .reader-stage {
  background:
    radial-gradient(ellipse at top, color-mix(in srgb, var(--gold) 5%, transparent), transparent 55%),
    var(--xuan-dark);
}

.reader-epub-view,
.reader-text-view {
  flex: 1;
  min-height: 0;
  width: 100%;
}
.reader-epub-view {
  padding: 0.5rem;
}
.reader-text-view {
  margin: 0;
  padding: 1.5rem clamp(1rem, 4vw, 3rem) 2.5rem;
  overflow: auto;
  white-space: pre-wrap;
  word-break: break-word;
  font-family: var(--font-serif);
  line-height: 2;
  letter-spacing: 0.04em;
}

.reader-page-slider {
  position: absolute;
  left: 1rem;
  right: 1rem;
  bottom: 0.6rem;
  width: auto;
  accent-color: var(--cinnabar);
}

.format-badge {
  display: inline-block;
  font-size: 0.65rem;
  padding: 0.1rem 0.4rem;
  border-radius: 999px;
  background: color-mix(in srgb, var(--gold) 20%, transparent);
  color: var(--gold);
  letter-spacing: 0.06em;
}
.cache-badge {
  font-size: 0.65rem;
  color: var(--bamboo);
}

@media (max-width: 768px) {
  .reader-toolbar-center { order: 3; width: 100%; justify-content: center; }
  .reader-main { position: relative; }
  .reader-main::after {
    content: "";
    position: absolute;
    inset: 0;
    z-index: 15;
    background: rgba(22, 21, 19, 0.32);
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.2s ease;
  }
  .reader-main:has(#reader-sidebar.is-open)::after {
    opacity: 1;
    pointer-events: auto;
  }
  .reader-sidebar,
  .reader-sidebar.collapsed {
    position: absolute;
    z-index: 20;
    top: 0;
    bottom: 0;
    left: 0;
    height: 100%;
    width: min(16.5rem, 86vw);
    margin-left: 0;
    box-shadow: 8px 0 24px rgba(0, 0, 0, 0.12);
    transform: translateX(-105%);
    visibility: hidden;
    pointer-events: none;
    transition: transform 0.25s ease, visibility 0.25s ease;
  }
  .reader-sidebar.is-open {
    transform: translateX(0);
    visibility: visible;
    pointer-events: auto;
  }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation: none !important;
    transition: none !important;
  }
}