:root {
  --ink: #18332c;
  --muted: #64716c;
  --paper: #f7f4ed;
  --surface: #fffdf8;
  --line: #ded9cd;
  --green: #173f35;
  --green-2: #276453;
  --gold: #bd8a37;
  --gold-soft: #f1e3c6;
  --shadow: 0 16px 45px rgba(28, 54, 46, 0.09);
  --radius: 18px;
  font-family: "Noto Serif SC", "Source Han Serif SC", "Songti SC", "Microsoft YaHei", serif;
  color: var(--ink);
  background: var(--paper);
  font-synthesis: none;
}

* {
  box-sizing: border-box;
}

[hidden] {
  display: none !important;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-width: 320px;
  background:
    radial-gradient(circle at 12% 10%, rgba(189, 138, 55, 0.08), transparent 26rem),
    var(--paper);
  color: var(--ink);
  line-height: 1.75;
}

body.has-image-viewer {
  overflow: hidden;
}

a {
  color: var(--green-2);
  text-decoration-thickness: 1px;
  text-underline-offset: 0.2em;
}

a:hover {
  color: #9a6722;
}

button,
input,
select {
  font: inherit;
}

.shell {
  width: min(1120px, calc(100% - 40px));
  margin-inline: auto;
}

.skip-link {
  position: fixed;
  z-index: 100;
  top: 10px;
  left: 10px;
  padding: 8px 14px;
  transform: translateY(-160%);
  border-radius: 8px;
  background: var(--surface);
}

.skip-link:focus {
  transform: translateY(0);
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  border-bottom: 1px solid rgba(222, 217, 205, 0.85);
  background: rgba(247, 244, 237, 0.92);
  backdrop-filter: blur(14px);
}

.header-inner,
.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 28px;
}

.header-inner {
  min-height: 76px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  color: var(--ink);
  text-decoration: none;
}

.brand:hover {
  color: var(--ink);
}

.brand-mark {
  display: grid;
  width: 42px;
  height: 42px;
  place-items: center;
  border: 1px solid var(--gold);
  border-radius: 50% 50% 46% 54%;
  background: var(--green);
  color: #fff8e9;
  font-weight: 700;
}

.brand strong,
.brand small {
  display: block;
  line-height: 1.35;
}

.brand strong {
  letter-spacing: 0.08em;
}

.brand small {
  color: var(--muted);
  font-family: "Microsoft YaHei", sans-serif;
  font-size: 0.72rem;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 6px;
  font-family: "Microsoft YaHei", sans-serif;
}

.site-nav a {
  padding: 8px 13px;
  border-radius: 999px;
  color: var(--muted);
  text-decoration: none;
}

.site-nav a:hover,
.site-nav a[aria-current="page"] {
  background: var(--gold-soft);
  color: var(--green);
}

.hero {
  padding: 88px 0 72px;
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.5fr) minmax(260px, 0.7fr);
  align-items: end;
  gap: 64px;
}

.eyebrow {
  margin: 0 0 14px;
  color: var(--gold);
  font-family: "Microsoft YaHei", sans-serif;
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1,
h2,
h3 {
  line-height: 1.3;
}

h1 {
  max-width: 780px;
  margin-bottom: 24px;
  font-size: clamp(2.5rem, 7vw, 5.3rem);
  font-weight: 700;
  letter-spacing: -0.04em;
}

.hero-title {
  max-width: none;
  font-size: clamp(2.7rem, 5.2vw, 4.6rem);
  line-height: 1.18;
}

.hero-title span {
  display: block;
  white-space: nowrap;
}

h2 {
  font-size: clamp(1.65rem, 4vw, 2.35rem);
}

h3 {
  font-size: 1.18rem;
}

.lead {
  max-width: 720px;
  color: var(--muted);
  font-size: clamp(1.05rem, 2vw, 1.25rem);
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 30px;
}

.section-actions {
  display: inline-flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
}

.button {
  display: inline-flex;
  min-height: 46px;
  align-items: center;
  justify-content: center;
  padding: 10px 20px;
  border: 1px solid var(--green);
  border-radius: 999px;
  background: var(--green);
  color: white;
  font-family: "Microsoft YaHei", sans-serif;
  font-weight: 700;
  text-decoration: none;
}

.button:hover {
  background: var(--green-2);
  color: white;
}

.button.secondary {
  background: transparent;
  color: var(--green);
}

.button.secondary:hover {
  background: rgba(23, 63, 53, 0.06);
}

.button.compact {
  min-height: 34px;
  padding: 7px 13px;
  font-size: 0.88rem;
}

.plain-list {
  margin: 18px 0 0;
  padding-left: 1.2em;
  color: var(--muted);
}

.plain-list li {
  margin-bottom: 6px;
}

.button.ghost {
  border-color: transparent;
  background: transparent;
  color: var(--muted);
}

.button.ghost:hover {
  background: rgba(23, 63, 53, 0.06);
  color: var(--green);
}

.button.is-active {
  background: var(--gold-soft);
  color: var(--green);
}

.hero-note,
.notice {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(255, 253, 248, 0.72);
  box-shadow: var(--shadow);
}

.hero-note {
  padding: 26px;
}

.hero-note strong {
  display: block;
  margin-bottom: 8px;
  color: var(--gold);
  font-size: 1.45rem;
}

.hero-note p:last-child,
.notice p:last-child,
.card p:last-child {
  margin-bottom: 0;
}

.stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 12px;
  margin-top: 32px;
}

.stat {
  padding: 18px;
  border-left: 2px solid var(--gold);
}

.stat strong,
.stat span {
  display: block;
}

.stat strong {
  font-size: 1.55rem;
}

.stat span {
  color: var(--muted);
  font-family: "Microsoft YaHei", sans-serif;
  font-size: 0.82rem;
}

.section {
  padding: 64px 0;
}

.section.tint {
  border-block: 1px solid var(--line);
  background: rgba(255, 253, 248, 0.58);
}

.section-heading {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 24px;
  margin-bottom: 28px;
}

.section-heading.compact {
  align-items: center;
  margin-bottom: 16px;
}

.section-heading h2,
.section-heading p {
  margin-bottom: 0;
}

.grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.card {
  position: relative;
  display: flex;
  min-height: 100%;
  flex-direction: column;
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  box-shadow: 0 8px 24px rgba(28, 54, 46, 0.04);
  transition: transform 160ms ease, box-shadow 160ms ease;
}

.card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow);
}

.card h3 {
  margin-bottom: 8px;
}

.card h3 a::after {
  position: absolute;
  inset: 0;
  content: "";
}

.card h3 a {
  color: var(--ink);
  text-decoration: none;
}

.card .meta,
.meta {
  color: var(--muted);
  font-family: "Microsoft YaHei", sans-serif;
  font-size: 0.87rem;
}

.author-link {
  color: var(--green);
  text-decoration-color: rgba(23, 63, 53, 0.35);
  text-underline-offset: 0.18em;
}

.author-link:hover,
.author-link:focus-visible {
  color: var(--gold);
  text-decoration-color: currentColor;
}

.card .description {
  display: -webkit-box;
  overflow: hidden;
  margin: 14px 0 20px;
  color: var(--muted);
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 3;
}

.skeleton-card {
  min-height: 170px;
  pointer-events: none;
}

.skeleton-card span {
  display: block;
  height: 14px;
  margin-bottom: 14px;
  border-radius: 999px;
  animation: skeleton-pulse 1.2s ease-in-out infinite;
  background: linear-gradient(90deg, rgba(226, 216, 196, 0.45), rgba(226, 216, 196, 0.95), rgba(226, 216, 196, 0.45));
  background-size: 220% 100%;
}

.skeleton-card span:first-child {
  width: 72%;
  height: 22px;
}

.skeleton-card span:nth-child(2) {
  width: 46%;
}

.skeleton-card span:nth-child(3) {
  width: 58%;
  margin-top: auto;
}

@keyframes skeleton-pulse {
  from {
    background-position: 220% 0;
  }

  to {
    background-position: -220% 0;
  }
}

.card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-top: auto;
}

.badge,
.tag {
  display: inline-flex;
  align-items: center;
  padding: 4px 10px;
  border-radius: 999px;
  font-family: "Microsoft YaHei", sans-serif;
  font-size: 0.75rem;
}

.badge {
  background: var(--gold-soft);
  color: #76521f;
}

.tag {
  border: 1px solid var(--line);
  background: #fff;
  color: var(--muted);
}

.tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.page-hero {
  padding: 62px 0 38px;
}

.page-hero h1 {
  margin-bottom: 16px;
  font-size: clamp(2.2rem, 5vw, 4rem);
}

.book-detail-hero {
  padding-bottom: 58px;
}

.book-hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(280px, 380px);
  gap: clamp(32px, 6vw, 76px);
  align-items: center;
}

.book-hero-copy,
.book-hero-cover {
  min-width: 0;
}

.book-hero-cover {
  display: flex;
  justify-content: flex-end;
}

.book-hero-cover .book-cover-card {
  width: min(100%, 380px);
  margin-bottom: 0;
}

.book-hero-cover .book-cover-card img {
  max-height: 440px;
}

.breadcrumbs {
  margin-bottom: 22px;
  color: var(--muted);
  font-family: "Microsoft YaHei", sans-serif;
  font-size: 0.84rem;
}

.breadcrumbs a {
  color: inherit;
}

.search-panel {
  display: grid;
  grid-template-columns: 1fr 260px;
  gap: 14px;
  margin-bottom: 24px;
  padding: 20px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
}

.field label {
  display: block;
  margin-bottom: 6px;
  color: var(--muted);
  font-family: "Microsoft YaHei", sans-serif;
  font-size: 0.82rem;
  font-weight: 700;
}

.field input,
.field select {
  width: 100%;
  min-height: 48px;
  padding: 9px 13px;
  border: 1px solid #b9b5ab;
  border-radius: 10px;
  outline: none;
  background: white;
  color: var(--ink);
}

.field-hint {
  margin-top: 6px;
  margin-bottom: 0;
  color: var(--muted);
  font-family: "Microsoft YaHei", sans-serif;
  font-size: 0.82rem;
}

.category-filter-panel {
  grid-template-columns: 1fr;
}

.field input:focus,
.field select:focus {
  border-color: var(--green-2);
  box-shadow: 0 0 0 3px rgba(39, 100, 83, 0.13);
}

.result-summary {
  min-height: 1.75em;
  margin-bottom: 18px;
  color: var(--muted);
  font-family: "Microsoft YaHei", sans-serif;
}

.load-more-wrap {
  display: flex;
  justify-content: center;
  margin-top: 28px;
}

.scroll-sentinel {
  min-height: 52px;
  padding: 18px 0;
  color: var(--muted);
  font-family: "Microsoft YaHei", sans-serif;
  text-align: center;
}

.alphabet-index {
  position: fixed;
  z-index: 40;
  top: 50%;
  right: clamp(8px, 2vw, 26px);
  display: grid;
  gap: 3px;
  transform: translateY(-50%);
}

.alphabet-index::before {
  color: var(--muted);
  content: "定位";
  font-family: "Microsoft YaHei", sans-serif;
  font-size: 0.65rem;
  text-align: center;
}

.alphabet-index button {
  width: 28px;
  height: 24px;
  border: 0;
  border-radius: 999px;
  background: rgba(255, 253, 248, 0.92);
  color: var(--green);
  cursor: pointer;
  font-family: "Microsoft YaHei", sans-serif;
  font-size: 0.75rem;
  font-weight: 700;
  box-shadow: 0 8px 24px rgba(28, 54, 46, 0.08);
}

.alphabet-index button:hover,
.alphabet-index button:focus-visible,
.alphabet-index button.is-active {
  background: var(--green);
  color: white;
}

.alphabet-index button:disabled {
  cursor: default;
  opacity: 0.28;
}

.empty-state {
  padding: 48px 24px;
  border: 1px dashed #b9b5ab;
  border-radius: var(--radius);
  color: var(--muted);
  text-align: center;
}

.book-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.5fr) minmax(260px, 0.7fr);
  gap: 48px;
}

.author-layout {
  display: grid;
  grid-template-columns: minmax(240px, 0.48fr) minmax(0, 1fr);
  gap: 38px;
  align-items: start;
}

.author-profile-card {
  position: sticky;
  top: 110px;
  padding: 26px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  box-shadow: var(--shadow);
}

.author-profile-card h2 {
  margin-top: 0;
  font-size: 1.35rem;
}

.author-profile-card p {
  color: var(--muted);
}

.book-main,
.book-aside {
  min-width: 0;
}

.book-cover-card {
  overflow: hidden;
  margin-bottom: 28px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #fff;
  box-shadow: var(--shadow);
}

.media-viewer-trigger {
  display: block;
  width: 100%;
  margin: 0;
  padding: 0;
  border: 0;
  background: transparent;
  color: inherit;
  cursor: zoom-in;
  font: inherit;
  text-align: inherit;
}

.media-viewer-trigger:focus-visible {
  outline: 3px solid var(--gold);
  outline-offset: 3px;
}

.book-cover-card img {
  display: block;
  width: 100%;
  max-height: 520px;
  object-fit: cover;
  object-position: top;
}

.book-cover-placeholder {
  display: grid;
  min-height: 360px;
  place-items: center;
  padding: 32px;
  background:
    linear-gradient(135deg, rgba(23, 63, 53, 0.96), rgba(39, 100, 83, 0.9)),
    var(--green);
  color: #fff8e9;
  text-align: center;
}

.book-cover-placeholder span,
.book-cover-placeholder small {
  display: block;
}

.book-cover-placeholder span {
  font-size: clamp(1.6rem, 3vw, 2.4rem);
  font-weight: 800;
  line-height: 1.35;
}

.book-cover-placeholder small {
  margin-top: 18px;
  color: rgba(255, 248, 233, 0.78);
  font-family: "Microsoft YaHei", sans-serif;
}

.book-section {
  margin-bottom: 38px;
}

.book-section h2 {
  font-size: 1.5rem;
}

.book-opinions {
  display: grid;
  gap: 16px;
}

.book-opinions-list {
  display: grid;
  gap: 12px;
}

.book-opinion-card {
  padding: 16px 18px;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: rgba(255, 253, 248, 0.78);
}

.book-opinion-card p {
  margin: 0;
  white-space: pre-wrap;
  line-height: 1.8;
}

.book-opinion-meta {
  display: block;
  margin-top: 8px;
  color: var(--muted);
  font-family: "Microsoft YaHei", sans-serif;
  font-size: 0.82rem;
}

.book-opinions-form {
  display: grid;
  gap: 10px;
}

.book-opinions-form label {
  color: var(--muted);
  font-family: "Microsoft YaHei", sans-serif;
  font-weight: 700;
}

.book-opinions-form textarea {
  width: 100%;
  min-height: 120px;
  resize: vertical;
  padding: 14px 16px;
  border: 1px solid rgba(23, 63, 53, 0.28);
  border-radius: 18px;
  background: rgba(255, 253, 248, 0.84);
  color: var(--ink);
  font: inherit;
}

.book-opinions-form textarea:focus {
  border-color: var(--green);
  outline: 3px solid rgba(23, 63, 53, 0.12);
}

.catalog-note {
  padding: 12px 14px;
  border-left: 3px solid var(--gold);
  background: rgba(202, 136, 31, 0.08);
  color: var(--muted);
  font-family: "Microsoft YaHei", sans-serif;
  font-size: 0.9rem;
}

.metadata-list {
  margin: 0;
  border-top: 1px solid var(--line);
}

.metadata-row {
  display: grid;
  grid-template-columns: 88px 1fr;
  gap: 16px;
  padding: 12px 0;
  border-bottom: 1px solid var(--line);
}

.metadata-row dt {
  color: var(--muted);
}

.metadata-row dd {
  margin: 0;
}

.notice {
  padding: 22px;
}

.notice strong {
  display: block;
  margin-bottom: 6px;
}

.preview-grid {
  display: grid;
  grid-auto-flow: column;
  grid-auto-columns: minmax(170px, 1fr);
  gap: 12px;
  overflow-x: auto;
  overscroll-behavior-inline: contain;
  padding-bottom: 12px;
  scroll-padding-inline: 4px;
  scroll-snap-type: x mandatory;
}

.preview-page {
  overflow: hidden;
  min-height: 190px;
  margin: 0;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: #fff;
  scroll-snap-align: start;
}

.preview-page-button {
  overflow: hidden;
}

.preview-page img {
  display: block;
  width: 100%;
  height: 220px;
  object-fit: cover;
  object-position: top;
}

.preview-page figcaption {
  padding: 8px 10px;
  color: var(--muted);
  font-family: "Microsoft YaHei", sans-serif;
  font-size: 0.78rem;
}

.preview-placeholder {
  display: grid;
  min-height: 190px;
  place-items: center;
  padding: 18px;
  color: var(--muted);
  text-align: center;
}

.preview-placeholder span,
.preview-placeholder small {
  display: block;
}

.preview-placeholder span {
  color: var(--ink);
  font-weight: 700;
}

.image-viewer {
  position: fixed;
  inset: 0;
  z-index: 200;
  display: none;
  grid-template-rows: auto minmax(0, 1fr) auto;
  background: rgba(13, 28, 24, 0.92);
  color: #fff8e9;
}

.image-viewer.is-open {
  display: grid;
}

.image-viewer-top,
.image-viewer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 14px clamp(16px, 3vw, 34px);
}

.image-viewer-title {
  min-width: 0;
  overflow: hidden;
  font-family: "Microsoft YaHei", sans-serif;
  font-weight: 700;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.image-viewer-tools {
  display: flex;
  flex: 0 0 auto;
  gap: 8px;
}

.image-viewer-stage {
  position: relative;
  display: grid;
  min-height: 0;
  overflow: auto;
  place-items: center;
  padding: clamp(12px, 2vw, 24px);
}

.image-viewer-stage.is-zoomed {
  cursor: default;
}

.image-viewer-image {
  display: block;
  max-width: min(96vw, 1280px);
  max-height: 78vh;
  border-radius: 12px;
  box-shadow: 0 24px 80px rgba(0, 0, 0, 0.38);
  object-fit: contain;
  transform-origin: center center;
  transition: transform 0.16s ease;
  user-select: none;
  will-change: transform;
}

.image-viewer-image.is-pannable {
  cursor: grab;
  touch-action: none;
}

.image-viewer-image.is-panning {
  cursor: grabbing;
  transition: none;
}

.image-viewer-button {
  display: inline-flex;
  min-width: 46px;
  min-height: 46px;
  align-items: center;
  justify-content: center;
  border: 1px solid rgba(255, 248, 233, 0.42);
  border-radius: 999px;
  background: rgba(255, 248, 233, 0.12);
  color: #fff8e9;
  cursor: pointer;
  font: inherit;
}

.image-viewer-button:hover,
.image-viewer-button:focus-visible {
  background: rgba(255, 248, 233, 0.22);
}

.image-viewer-button:disabled {
  cursor: not-allowed;
  opacity: 0.35;
}

.image-viewer-nav {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
}

.image-viewer-prev {
  left: clamp(10px, 2vw, 28px);
}

.image-viewer-next {
  right: clamp(10px, 2vw, 28px);
}

.image-viewer-bottom {
  justify-content: center;
  color: rgba(255, 248, 233, 0.78);
  font-family: "Microsoft YaHei", sans-serif;
}

.access-panel {
  margin-bottom: 22px;
  padding: 22px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--green);
  color: #fff8e9;
  box-shadow: var(--shadow);
}

.access-panel h2 {
  margin-bottom: 10px;
  font-size: 1.35rem;
}

.access-panel p {
  color: rgba(255, 248, 233, 0.86);
}

.access-panel .meta {
  color: rgba(255, 248, 233, 0.72);
}

.access-panel .button {
  border-color: #fff8e9;
  background: #fff8e9;
  color: var(--green);
}

.access-panel .button.secondary {
  border-color: rgba(255, 248, 233, 0.72);
  background: transparent;
  color: #fff8e9;
}

.access-panel .button.secondary:hover {
  background: rgba(255, 248, 233, 0.12);
}

.access-panel .button:disabled {
  cursor: not-allowed;
  opacity: 0.68;
}

.access-form label {
  display: block;
  margin-bottom: 6px;
  font-family: "Microsoft YaHei", sans-serif;
  font-size: 0.84rem;
  font-weight: 700;
}

.access-form-row {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
}

.access-form input[type="password"] {
  grid-column: 1 / -1;
  min-width: 0;
  min-height: 46px;
  padding: 9px 12px;
  border: 1px solid rgba(255, 248, 233, 0.72);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.95);
  color: var(--ink);
}

.access-form-row .button {
  width: 100%;
  padding-inline: 14px;
  white-space: nowrap;
}

.toc {
  padding-left: 1.3em;
}

.toc li {
  margin-bottom: 6px;
}

.prose {
  max-width: 780px;
}

.prose h2 {
  margin-top: 42px;
  font-size: 1.55rem;
}

.prose li {
  margin-bottom: 8px;
}

.upload-panel {
  display: grid;
  grid-template-columns: minmax(0, 0.8fr) minmax(300px, 1fr);
  gap: 32px;
  align-items: start;
  padding: 30px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  box-shadow: var(--shadow);
}

.upload-panel h2 {
  margin-bottom: 12px;
  font-size: 1.65rem;
}

.upload-form {
  display: grid;
  gap: 16px;
}

.upload-form input[type="file"] {
  width: 100%;
  padding: 10px;
  border: 1px solid #b9b5ab;
  border-radius: 10px;
  background: white;
  color: var(--ink);
}

.upload-form button:disabled {
  cursor: not-allowed;
  opacity: 0.55;
}

.admin-shell {
  display: grid;
  gap: 30px;
  width: min(1440px, calc(100% - 56px));
}

.admin-login-card,
.admin-panel,
.admin-add-book-form,
.admin-book-form {
  padding: 28px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  box-shadow: var(--shadow);
}

.admin-login-card,
.admin-add-book-form,
.admin-book-form {
  display: grid;
  gap: 16px;
}

.admin-panel {
  display: grid;
  grid-template-columns: minmax(220px, 280px) minmax(0, 1fr);
  gap: 34px;
  align-items: start;
  min-height: 620px;
}

.admin-panel[hidden],
.admin-book-form[hidden],
.admin-section[hidden] {
  display: none;
}

.admin-sidebar {
  position: sticky;
  top: 100px;
  display: grid;
  gap: 18px;
}

.admin-sidebar-title h2 {
  margin: 4px 0 0;
  font-size: 1.4rem;
}

.admin-nav {
  display: grid;
  gap: 8px;
}

.admin-nav-button,
.admin-overview-card {
  width: 100%;
  border: 1px solid var(--line);
  background: rgba(255, 253, 248, 0.78);
  color: var(--ink);
  font: inherit;
  text-align: left;
  cursor: pointer;
  transition:
    background 0.18s ease,
    border-color 0.18s ease,
    transform 0.18s ease;
}

.admin-nav-button {
  padding: 12px 14px;
  border-radius: 999px;
}

.admin-nav-button:hover,
.admin-nav-button.is-active,
.admin-overview-card:hover {
  border-color: rgba(13, 67, 55, 0.35);
  background: var(--cream);
}

.admin-nav-button.is-active {
  color: var(--green);
  font-weight: 700;
}

.admin-main {
  min-width: 0;
}

.admin-section {
  display: none;
  gap: 18px;
}

.admin-section.is-active {
  display: grid;
}

.admin-overview-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.admin-overview-card {
  display: grid;
  gap: 8px;
  min-height: 130px;
  padding: 20px;
  border-radius: 18px;
}

.admin-overview-card:hover {
  transform: translateY(-2px);
}

.admin-overview-card strong {
  color: var(--green);
  font-family: var(--serif);
  font-size: 1.35rem;
}

.admin-overview-card span {
  color: var(--muted);
  line-height: 1.7;
}

.admin-list,
.admin-book-results,
.admin-reading-list,
.admin-comments-list {
  display: grid;
  gap: 12px;
}

.admin-upload-card,
.admin-book-result,
.admin-reading-card,
.admin-comment-card {
  width: 100%;
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: rgba(255, 253, 248, 0.78);
  color: var(--ink);
  text-align: left;
}

.admin-book-result {
  display: grid;
  gap: 14px;
}

.admin-book-result-main {
  width: 100%;
  padding: 0;
  border: 0;
  background: transparent;
  color: inherit;
  font: inherit;
  text-align: left;
  cursor: pointer;
}

.admin-book-result strong,
.admin-book-result span,
.admin-reading-card a,
.admin-comment-card a {
  display: block;
}

.admin-reading-card a,
.admin-comment-card a {
  color: var(--green);
  font-family: var(--serif);
  font-size: 1.05rem;
  font-weight: 700;
  text-decoration: none;
}

.admin-reading-card a:hover,
.admin-comment-card a:hover {
  text-decoration: underline;
}

.admin-comment-message {
  margin: 8px 0 0;
  white-space: pre-wrap;
}

.admin-card-actions,
.admin-reading-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 14px;
}

.admin-book-result .admin-reading-actions {
  margin-top: 0;
}

.admin-search-panel {
  grid-template-columns: 1fr;
  margin-bottom: 0;
}

.field textarea {
  width: 100%;
  padding: 11px 13px;
  border: 1px solid #b9b5ab;
  border-radius: 10px;
  outline: none;
  background: white;
  color: var(--ink);
  font: inherit;
  resize: vertical;
}

.field textarea:focus {
  border-color: var(--green-2);
  box-shadow: 0 0 0 3px rgba(39, 100, 83, 0.13);
}

.field-label {
  display: block;
  margin-bottom: 8px;
  color: var(--ink);
  font-family: "Microsoft YaHei", sans-serif;
  font-weight: 700;
}

.checkbox-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(170px, 1fr));
  gap: 10px;
}

.checkbox-option {
  display: flex;
  align-items: center;
  gap: 9px;
  min-height: 42px;
  padding: 9px 12px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(255, 253, 248, 0.82);
  color: var(--ink);
  cursor: pointer;
  font-family: "Microsoft YaHei", sans-serif;
  font-size: 0.92rem;
}

.checkbox-option:hover,
.checkbox-option:has(input:focus-visible) {
  border-color: var(--green-2);
  box-shadow: 0 0 0 3px rgba(39, 100, 83, 0.1);
}

.checkbox-option input {
  width: 16px;
  height: 16px;
  accent-color: var(--green);
}

.checkbox-option:has(input:checked) {
  border-color: rgba(17, 73, 59, 0.42);
  background: var(--gold-soft);
}

.inline-add-field {
  margin-top: 12px;
}

.inline-add-field label {
  display: block;
  margin-bottom: 6px;
  color: var(--muted);
  font-family: "Microsoft YaHei", sans-serif;
  font-size: 0.86rem;
  font-weight: 700;
}

.inline-add-field > div {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 10px;
}

.inline-add-field input {
  min-width: 0;
  padding: 11px 13px;
  border: 1px solid #b9b5ab;
  border-radius: 10px;
  outline: none;
  background: white;
  color: var(--ink);
  font: inherit;
}

.inline-add-field input:focus {
  border-color: var(--green-2);
  box-shadow: 0 0 0 3px rgba(39, 100, 83, 0.13);
}

.field-help {
  margin: 8px 0 0;
  color: var(--muted);
  font-family: "Microsoft YaHei", sans-serif;
  font-size: 0.86rem;
  line-height: 1.7;
}

.multi-suggestion-panel {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 8px;
}

.multi-suggestion-panel[hidden] {
  display: none;
}

.suggestion-chip {
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 6px 12px;
  background: #fffdf8;
  color: var(--green);
  font: inherit;
  font-size: 0.9rem;
  cursor: pointer;
}

.suggestion-chip:hover,
.suggestion-chip:focus-visible {
  border-color: var(--gold);
  background: var(--cream);
}

.form-status {
  margin: 0;
  color: var(--muted);
  font-family: "Microsoft YaHei", sans-serif;
  font-size: 0.88rem;
}

.site-footer {
  margin-top: 72px;
  padding: 40px 0;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-family: "Microsoft YaHei", sans-serif;
  font-size: 0.86rem;
}

.footer-inner {
  align-items: flex-start;
}

.footer-inner p {
  max-width: 520px;
  margin-bottom: 0;
}

.reader-body {
  background: #f2eee4;
}

.reader-header {
  position: sticky;
  top: 0;
  z-index: 30;
  display: flex;
  min-height: 62px;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 10px clamp(16px, 4vw, 44px);
  border-bottom: 1px solid rgba(222, 217, 205, 0.9);
  background: rgba(247, 244, 237, 0.94);
  backdrop-filter: blur(14px);
}

.reader-brand {
  color: var(--ink);
  font-weight: 700;
  text-decoration: none;
}

.reader-mode {
  color: var(--muted);
  font-family: "Microsoft YaHei", sans-serif;
  font-size: 0.86rem;
}

.reader-shell {
  width: min(100% - 28px, 980px);
  margin-inline: auto;
  padding: 24px 0 72px;
}

.reader-intro {
  margin-bottom: 18px;
}

.reader-intro h1 {
  margin-bottom: 10px;
  font-size: clamp(1.55rem, 3.1vw, 2.55rem);
}

.reader-fallback-link {
  margin-top: 8px;
  color: var(--muted);
  font-family: "Microsoft YaHei", sans-serif;
  font-size: 0.94rem;
}

.reader-toolbar {
  position: sticky;
  top: 70px;
  z-index: 24;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  margin-top: 22px;
  padding: 14px;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: rgba(255, 252, 246, 0.94);
  backdrop-filter: blur(14px);
  box-shadow: 0 14px 38px rgba(48, 42, 31, 0.08);
}

.reader-toolbar[hidden] {
  display: none;
}

.reader-toolbar-links,
.reader-page-jump,
.reader-zoom-controls {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
}

.reader-toolbar-hint {
  flex-basis: 100%;
  margin: -4px 0 0;
  color: var(--muted);
  font-family: "Microsoft YaHei", sans-serif;
  font-size: 0.82rem;
}

.reader-floating-actions {
  position: fixed;
  right: clamp(14px, 2vw, 28px);
  bottom: clamp(16px, 2.4vw, 32px);
  z-index: 28;
  display: grid;
  gap: 10px;
}

.reader-floating-actions[hidden] {
  display: none;
}

.reader-floating-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid rgba(23, 63, 53, 0.24);
  border-radius: 999px;
  background: rgba(255, 252, 246, 0.94);
  box-shadow: 0 14px 34px rgba(48, 42, 31, 0.12);
  color: var(--ink);
  cursor: pointer;
  font: inherit;
  font-family: "Microsoft YaHei", sans-serif;
  padding: 10px 14px;
  text-align: center;
  text-decoration: none;
}

.reader-floating-button:hover {
  background: var(--accent-soft);
}

.reader-text-button {
  appearance: none;
  border: 0;
  background: transparent;
  color: var(--ink);
  font: inherit;
  font-family: "Microsoft YaHei", sans-serif;
  text-decoration: underline;
  text-underline-offset: 4px;
  cursor: pointer;
}

.reader-page-jump {
  color: var(--muted);
  font-family: "Microsoft YaHei", sans-serif;
  font-size: 0.92rem;
}

.reader-page-jump input {
  width: 86px;
  padding: 9px 10px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: #fff;
  color: var(--ink);
  font: inherit;
}

.reader-page-step {
  border: 1px solid rgba(23, 63, 53, 0.22);
  border-radius: 999px;
  background: rgba(23, 63, 53, 0.06);
  color: var(--ink);
  cursor: pointer;
  font: inherit;
  padding: 9px 14px;
}

.reader-page-step:disabled {
  cursor: not-allowed;
  opacity: 0.45;
}

.reader-page-jump .button {
  padding: 9px 16px;
}

.reader-pages {
  display: grid;
  gap: 26px;
  justify-items: center;
  overflow-x: auto;
  padding-bottom: 8px;
  scroll-behavior: smooth;
  touch-action: pan-y pinch-zoom;
}

.reader-pages.is-zoomed {
  cursor: grab;
}

.reader-pages.is-dragging {
  cursor: grabbing;
  scroll-behavior: auto;
  user-select: none;
}

.reader-page {
  width: calc(min(100vw - 28px, 980px) * var(--reader-zoom, 1));
  margin: 0;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: #fff;
  box-shadow: var(--shadow);
}

.reader-page img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: 16px 16px 0 0;
  cursor: zoom-in;
  user-select: none;
}

.reader-page-error {
  display: grid;
  min-height: 220px;
  place-items: center;
  gap: 14px;
  padding: 34px;
  color: var(--muted);
  text-align: center;
}

.reader-page-error[hidden] {
  display: none;
}

.reader-page-error p {
  margin: 0;
}

.reader-page-error .button {
  width: fit-content;
}

.reader-page figcaption {
  padding: 8px 14px 10px;
  color: var(--muted);
  font-family: "Microsoft YaHei", sans-serif;
  font-size: 0.8rem;
  text-align: center;
}

.reader-comments {
  border-top: 1px solid var(--line);
  background: rgba(247, 244, 237, 0.62);
}

.reader-comments-toggle {
  width: 100%;
  border: 0;
  background: transparent;
  color: var(--ink);
  cursor: pointer;
  font: inherit;
  font-family: "Microsoft YaHei", sans-serif;
  padding: 12px 16px;
  text-align: left;
}

.reader-comments-body {
  display: grid;
  gap: 14px;
  padding: 0 16px 16px;
}

.reader-comments-body[hidden] {
  display: none;
}

.reader-comments-list {
  display: grid;
  gap: 10px;
}

.reader-comment {
  padding: 12px;
  border: 1px solid rgba(222, 217, 205, 0.9);
  border-radius: 12px;
  background: rgba(255, 252, 246, 0.82);
}

.reader-comment p {
  margin: 0;
}

.reader-comment-meta,
.reader-comments-empty,
.reader-comments-status {
  color: var(--muted);
  font-family: "Microsoft YaHei", sans-serif;
  font-size: 0.86rem;
}

.reader-comments-form {
  display: grid;
  gap: 10px;
}

.reader-comments-form label {
  display: grid;
  gap: 6px;
  color: var(--muted);
  font-family: "Microsoft YaHei", sans-serif;
  font-size: 0.88rem;
}

.reader-comments-form input,
.reader-comments-form textarea {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: #fff;
  color: var(--ink);
  font: inherit;
  padding: 10px 12px;
}

@media (max-width: 820px) {
  .admin-shell {
    width: min(100% - 40px, 1120px);
  }

  .hero-grid,
  .book-hero-grid,
  .book-layout,
  .author-layout,
  .upload-panel,
  .admin-panel {
    grid-template-columns: 1fr;
    gap: 30px;
  }

  .admin-sidebar {
    position: static;
  }

  .admin-nav {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .admin-nav-button {
    text-align: center;
  }

  .author-profile-card {
    position: static;
  }

  .book-hero-cover {
    justify-content: flex-start;
  }

  .grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .search-panel {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 620px) {
  .shell {
    width: min(100% - 28px, 1120px);
  }

  .header-inner {
    align-items: flex-start;
    flex-direction: column;
    gap: 10px;
    padding: 14px 0;
  }

  .site-nav {
    width: 100%;
    justify-content: space-between;
  }

  .site-nav a {
    padding: 6px 9px;
  }

  .hero {
    padding-top: 56px;
  }

  .hero-title {
    font-size: clamp(1.85rem, 9vw, 3.1rem);
  }

  .stats,
  .grid,
  .access-form-row,
  .admin-overview-grid,
  .admin-nav {
    grid-template-columns: 1fr;
  }

  .reader-toolbar,
  .reader-page-jump,
  .reader-zoom-controls {
    align-items: stretch;
    flex-direction: column;
  }

  .reader-toolbar-links {
    justify-content: space-between;
  }

  .reader-floating-actions {
    right: 14px;
    bottom: 14px;
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .reader-floating-button {
    padding: 9px 10px;
  }

  .reader-page-jump input,
  .reader-page-step,
  .reader-page-jump .button {
    width: 100%;
  }

  .preview-grid {
    grid-auto-columns: minmax(72vw, 1fr);
  }

  .section-heading,
  .footer-inner {
    align-items: flex-start;
    flex-direction: column;
  }

  .metadata-row {
    grid-template-columns: 72px 1fr;
  }

  .book-hero-cover .book-cover-card {
    width: 100%;
  }

  .image-viewer-image {
    max-height: 72vh;
  }

  .image-viewer-top {
    align-items: flex-start;
    flex-wrap: wrap;
  }

  .alphabet-index {
    top: auto;
    right: 8px;
    bottom: 8px;
    left: 8px;
    display: flex;
    overflow-x: auto;
    padding: 6px;
    border: 1px solid var(--line);
    border-radius: 999px;
    background: rgba(255, 253, 248, 0.94);
    transform: none;
  }

  .alphabet-index::before {
    display: none;
  }

  .alphabet-index button {
    flex: 0 0 auto;
    width: 27px;
    height: 24px;
    font-size: 0.68rem;
    box-shadow: none;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    transition-duration: 0.01ms !important;
  }
}