:root {
     --site-accent: #c23a22;
     --site-accent-light: #e57a63;
     --site-accent-dark: #a93226;
     --site-accent-soft: rgba(194, 58, 34, 0.08);
     --reading-surface: #f7f1ec;
     --reading-border: #ead9cd;
 }

 body.readingclub-subpage {
     min-height: 100vh;
     display: flex;
     flex-direction: column;
     background:
         radial-gradient(circle at top right, rgba(194, 58, 34, 0.08), transparent 28%),
         linear-gradient(180deg, #fbf8f4 0%, #fafaf9 34%, #fafaf9 100%);
 }

 .readingclub-shell {
     width: min(1080px, calc(100% - 40px));
     margin: 0 auto;
     flex: 1;
 }

 .breadcrumb {
     display: inline-flex;
     flex-wrap: wrap;
     gap: 8px;
     margin-top: 92px;
     margin-bottom: 18px;
     color: var(--text-tertiary);
     font-size: var(--text-sm);
 }

 .breadcrumb a {
     color: var(--text-secondary);
 }

 .page-hero {
     padding-bottom: 32px;
 }

 .eyebrow {
     display: inline-flex;
     align-items: center;
     gap: 10px;
     margin-bottom: 18px;
     color: var(--site-accent);
     font-size: var(--text-xs);
     font-weight: 800;
     letter-spacing: 0.18em;
     text-transform: uppercase;
 }

 .eyebrow::before {
     content: "";
     width: 32px;
     height: 1px;
     background: currentColor;
     opacity: 0.7;
 }

 .page-hero h1 {
     font-family: var(--font-serif);
     font-size: clamp(2.4rem, 4.8vw, 4rem);
     line-height: 1.14;
     letter-spacing: -0.04em;
     max-width: 12em;
     margin-bottom: 18px;
 }

 .lead {
     max-width: 44rem;
     color: var(--text-secondary);
     font-size: var(--text-lg);
     line-height: 1.85;
 }

 .hero-actions {
     display: flex;
     flex-wrap: wrap;
     gap: 14px;
     margin-top: 26px;
 }

 .primary-btn,
 .secondary-btn {
     display: inline-flex;
     align-items: center;
     justify-content: center;
     padding: 14px 24px;
     border-radius: var(--radius-full);
     font-weight: 700;
     transition: transform var(--duration-fast) var(--ease-out), box-shadow var(--duration-fast) var(--ease-out), background var(--duration-fast) var(--ease-out);
 }

 .primary-btn {
     background: var(--site-accent);
     color: var(--text-inverse);
     box-shadow: var(--shadow-md);
 }

 .primary-btn:hover {
     color: var(--text-inverse);
     background: var(--site-accent-dark);
     text-decoration: none;
     transform: translateY(-1px);
 }

 .secondary-btn {
     background: rgba(255, 255, 255, 0.8);
     color: var(--text);
     border: 1px solid var(--border);
 }

 .secondary-btn:hover {
     text-decoration: none;
     border-color: var(--site-accent);
     color: var(--site-accent);
 }

 .hero-split,
 .info-split {
     display: grid;
     grid-template-columns: 1.2fr 0.8fr;
     gap: 24px;
     align-items: start;
 }

 .hero-panel,
 .info-panel,
 .cta-box,
 .tool-form,
 .result-card,
 .quote-card,
 .card,
 .list-card,
 .stat-card {
     border: 1px solid var(--reading-border);
     border-radius: 24px;
     background: rgba(255, 255, 255, 0.9);
     box-shadow: var(--shadow-sm);
 }

 .hero-panel,
 .info-panel,
 .cta-box,
 .tool-form,
 .result-card,
 .quote-card,
 .card,
 .list-card,
 .stat-card {
     padding: 24px;
 }

 .panel-label,
 .card-tag,
 .list-tag {
     display: inline-flex;
     margin-bottom: 12px;
     padding: 6px 10px;
     border-radius: var(--radius-full);
     background: var(--site-accent-soft);
     color: var(--site-accent);
     font-size: var(--text-xs);
     font-weight: 800;
     letter-spacing: 0.08em;
     text-transform: uppercase;
 }

 .hero-panel h2,
 .info-panel h2,
 .cta-box h2,
 .tool-form h2,
 .result-card h2,
 .section-header h2,
 .article-layout h2,
 .article-layout h3 {
     font-family: var(--font-serif);
     line-height: 1.3;
 }

 .hero-panel ul,
 .info-panel ul,
 .cta-box ul {
     display: grid;
     gap: 12px;
     padding-left: 18px;
     color: var(--text-secondary);
 }

 .hero-panel li strong,
 .info-panel li strong {
     color: var(--text);
 }

 .section {
     padding: 22px 0 56px;
 }

 .section-header {
     display: flex;
     justify-content: space-between;
     align-items: end;
     gap: 18px;
     margin-bottom: 22px;
 }

 .section-header h2 {
     font-size: clamp(1.8rem, 3vw, 2.5rem);
     letter-spacing: -0.03em;
     max-width: 13em;
 }

 .section-header p {
     max-width: 36rem;
     color: var(--text-secondary);
 }

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

 .card h3,
 .list-card h3,
 .stat-card h3 {
     font-size: 1.15rem;
     margin-bottom: 10px;
 }

 .card p,
 .list-card p,
 .stat-card p,
 .card li,
 .list-card li,
 .stat-card li {
     color: var(--text-secondary);
     line-height: 1.8;
 }

 .card ul,
 .list-card ul,
 .stat-card ul {
     padding-left: 18px;
 }

 .card-link {
     display: inline-flex;
     align-items: center;
     gap: 8px;
     margin-top: 16px;
     font-weight: 700;
 }

 .list-stack {
     display: grid;
     gap: 18px;
 }

 .list-card {
     display: grid;
     grid-template-columns: 0.9fr 1.8fr 0.7fr;
     gap: 18px;
     align-items: start;
 }

 .list-meta {
     color: var(--text-tertiary);
     font-size: var(--text-sm);
 }

 .list-card a.primary-btn,
 .list-card span.secondary-btn {
     width: fit-content;
 }

 .article-layout {
     display: grid;
     grid-template-columns: minmax(0, 1.65fr) minmax(280px, 0.75fr);
     gap: 28px;
 }

 .article-body {
     display: grid;
     gap: 26px;
 }

 .prose {
     border: 1px solid var(--reading-border);
     border-radius: 24px;
     background: rgba(255, 255, 255, 0.92);
     padding: 28px;
 }

 .prose p,
 .prose li {
     color: var(--text-secondary);
     line-height: 1.95;
 }

 .prose ul,
 .prose ol {
     padding-left: 22px;
     display: grid;
     gap: 10px;
 }

 .prose blockquote {
     margin: 0;
     padding: 18px 20px;
     border-left: 4px solid var(--site-accent);
     background: var(--site-accent-soft);
     color: var(--text);
     border-radius: 16px;
 }

 .article-aside {
     display: grid;
     gap: 18px;
     align-content: start;
 }

 .quote-card p {
     color: var(--text-secondary);
     line-height: 1.8;
 }

 .quote-card strong {
     display: block;
     margin-bottom: 8px;
     color: var(--text);
 }

 .cta-box {
     display: grid;
     grid-template-columns: 1.2fr 0.8fr;
     gap: 24px;
     align-items: start;
 }

 .wechat-grid {
     display: grid;
     grid-template-columns: repeat(2, minmax(0, 1fr));
     gap: 12px;
     margin-top: 18px;
 }

 .wechat-item {
     padding: 16px 18px;
     border: 1px solid var(--reading-border);
     border-radius: 18px;
     background: var(--reading-surface);
 }

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

 .wechat-id {
     font-family: var(--font-mono);
     color: var(--site-accent);
 }

 .side-links {
     display: grid;
     gap: 10px;
     margin-top: 14px;
 }

 .side-links a {
     display: flex;
     justify-content: space-between;
     gap: 14px;
     padding: 14px 16px;
     border-radius: 16px;
     border: 1px solid var(--reading-border);
     background: rgba(247, 241, 236, 0.9);
     color: var(--text);
 }

 .side-links a:hover {
     text-decoration: none;
     border-color: var(--site-accent);
 }

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

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

 .field,
 .option-group {
     display: grid;
     gap: 8px;
 }

 .field label,
 .option-group legend {
     font-weight: 700;
     color: var(--text);
 }

 .field input,
 .field select {
     width: 100%;
     padding: 12px 14px;
     border: 1px solid var(--border-strong);
     border-radius: 14px;
     background: #fff;
 }

 .option-group {
     border: 1px solid var(--reading-border);
     border-radius: 18px;
     padding: 16px;
 }

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

 .option-list label {
     display: flex;
     gap: 10px;
     align-items: start;
     color: var(--text-secondary);
 }

 .result-card[hidden] {
     display: none;
 }

 .result-highlight {
     display: inline-flex;
     margin-bottom: 12px;
     padding: 8px 12px;
     border-radius: var(--radius-full);
     background: var(--site-accent-soft);
     color: var(--site-accent);
     font-weight: 800;
 }

 .result-card p,
 .result-card li {
     color: var(--text-secondary);
     line-height: 1.8;
 }

 .result-card ul {
     padding-left: 20px;
     display: grid;
     gap: 10px;
 }

 .note-grid {
     display: grid;
     grid-template-columns: repeat(3, minmax(0, 1fr));
     gap: 16px;
 }

 .note {
     padding: 18px;
     border-radius: 18px;
     background: var(--reading-surface);
     border: 1px solid var(--reading-border);
 }

 .note strong {
     display: block;
     margin-bottom: 8px;
 }

 @media (max-width: 960px) {

     .hero-split,
     .info-split,
     .article-layout,
     .cta-box,
     .list-card {
         grid-template-columns: 1fr;
     }

     .card-grid,
     .note-grid {
         grid-template-columns: 1fr;
     }
 }

 @media (max-width: 720px) {
     .readingclub-shell {
         width: min(100%, calc(100% - 28px));
     }

     .breadcrumb {
         margin-top: 84px;
     }

     .form-grid,
     .wechat-grid {
         grid-template-columns: 1fr;
     }
 }

 :root {
     --site-accent: #c23a22;
     --site-accent-light: #e57a63;
     --site-accent-dark: #a93226;
     --site-accent-soft: rgba(194, 58, 34, 0.08);
     --reading-surface: #f7f1ec;
     --reading-border: #ead9cd;
 }

 body.readingclub-page {
     min-height: 100vh;
     display: flex;
     flex-direction: column;
     background:
         radial-gradient(circle at top right, rgba(194, 58, 34, 0.08), transparent 30%),
         linear-gradient(180deg, #fbf8f4 0%, #fafaf9 38%, #fafaf9 100%);
 }

 .readingclub-shell {
     width: min(1120px, calc(100% - 40px));
     margin: 0 auto;
     flex: 1;
 }

 .page-hero,
 .content-section,
 .page-join,
 .page-footer-note {
     padding: 28px 0;
 }

 .page-hero {
     padding-top: 88px;
 }

 .breadcrumb {
     display: inline-flex;
     align-items: center;
     gap: 10px;
     margin-bottom: 18px;
     color: var(--site-accent);
     font-size: var(--text-xs);
     font-weight: 800;
     letter-spacing: 0.18em;
     text-transform: uppercase;
 }

 .breadcrumb::before {
     content: "";
     width: 28px;
     height: 1px;
     background: currentColor;
     opacity: 0.7;
 }

 .page-hero-grid {
     display: grid;
     grid-template-columns: minmax(0, 1.3fr) minmax(280px, 0.7fr);
     gap: 28px;
     align-items: stretch;
 }

 .page-hero h1 {
     font-family: var(--font-serif);
     font-size: clamp(2.5rem, 4.6vw, 4rem);
     line-height: 1.15;
     letter-spacing: -0.04em;
     margin-bottom: 18px;
 }

 .page-hero p {
     color: var(--text-secondary);
     line-height: 1.85;
     font-size: var(--text-lg);
 }

 .hero-actions {
     display: flex;
     flex-wrap: wrap;
     gap: 14px;
     align-items: center;
     margin-top: 24px;
 }

 .primary-btn,
 .secondary-btn {
     display: inline-flex;
     align-items: center;
     justify-content: center;
     padding: 14px 22px;
     border-radius: var(--radius-full);
     font-weight: 700;
     text-decoration: none;
     transition: transform var(--duration-fast) var(--ease-out), box-shadow var(--duration-fast) var(--ease-out), background var(--duration-fast) var(--ease-out);
 }

 .primary-btn {
     background: var(--site-accent);
     color: var(--text-inverse);
     box-shadow: var(--shadow-md);
 }

 .primary-btn:hover {
     color: var(--text-inverse);
     background: var(--site-accent-dark);
     transform: translateY(-1px);
     text-decoration: none;
 }

 .secondary-btn {
     color: var(--text);
     border: 1px solid var(--border);
     background: rgba(255, 255, 255, 0.84);
 }

 .secondary-btn:hover {
     color: var(--site-accent);
     border-color: var(--site-accent);
     text-decoration: none;
 }

 .hero-panel,
 .card,
 .info-box,
 .question-card,
 .result-card,
 .table-box,
 .quote-box,
 .timeline-item,
 .review-card,
 .metric-card {
     border: 1px solid var(--border);
     border-radius: 24px;
     background: rgba(255, 255, 255, 0.88);
     box-shadow: var(--shadow-sm);
 }

 .hero-panel {
     padding: 26px;
     border-color: var(--reading-border);
     background: linear-gradient(180deg, rgba(255, 255, 255, 0.94), rgba(247, 241, 236, 0.96));
 }

 .panel-label,
 .section-kicker,
 .card-kicker {
     display: inline-flex;
     font-size: var(--text-xs);
     font-weight: 800;
     letter-spacing: 0.14em;
     text-transform: uppercase;
     color: var(--site-accent);
 }

 .hero-panel h2,
 .content-section h2,
 .content-section h3,
 .join-main h2 {
     font-family: var(--font-serif);
     letter-spacing: -0.03em;
 }

 .hero-panel h2 {
     margin: 10px 0 12px;
     font-size: 1.6rem;
     line-height: 1.35;
 }

 .hero-panel ul,
 .plain-list,
 .check-list {
     display: grid;
     gap: 12px;
     margin-top: 14px;
     padding-left: 0;
 }

 .hero-panel li,
 .plain-list li,
 .check-list li {
     list-style: none;
     color: var(--text-secondary);
     line-height: 1.7;
 }

 .hero-panel li strong,
 .check-list li strong {
     color: var(--text);
 }

 .section-header {
     display: flex;
     justify-content: space-between;
     gap: 20px;
     align-items: end;
     margin-bottom: 22px;
 }

 .section-header h2 {
     font-size: clamp(1.8rem, 3vw, 2.5rem);
     line-height: 1.22;
     max-width: 13em;
 }

 .section-header p {
     max-width: 38rem;
     color: var(--text-secondary);
 }

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

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

 .card {
     padding: 24px;
 }

 .card strong,
 .review-card strong,
 .metric-card strong,
 .timeline-item strong {
     display: block;
     margin: 10px 0 8px;
     font-size: 1.08rem;
     color: var(--text);
 }

 .card p,
 .review-card p,
 .metric-card p,
 .timeline-item p,
 .content-copy p,
 .content-copy li {
     color: var(--text-secondary);
     line-height: 1.85;
 }

 .card a,
 .list-links a,
 .inline-link {
     font-weight: 700;
 }

 .content-copy {
     display: grid;
     gap: 18px;
 }

 .content-copy h3 {
     margin-top: 10px;
     font-size: 1.45rem;
 }

 .content-copy ul,
 .content-copy ol {
     padding-left: 1.2rem;
 }

 .quote-box {
     padding: 24px 26px;
     border-color: var(--reading-border);
     background: linear-gradient(180deg, rgba(250, 245, 239, 0.92), rgba(255, 255, 255, 0.96));
 }

 .quote-box p {
     font-family: var(--font-serif);
     font-size: 1.22rem;
     line-height: 1.8;
     color: var(--text);
 }

 .metric-grid {
     display: grid;
     grid-template-columns: repeat(4, minmax(0, 1fr));
     gap: 16px;
 }

 .metric-card {
     padding: 20px;
 }

 .metric-card .number {
     display: block;
     font-size: clamp(1.8rem, 3vw, 2.5rem);
     font-weight: 900;
     color: var(--site-accent);
 }

 .table-box,
 .info-box {
     padding: 24px;
 }

 .table-box table {
     width: 100%;
     border-collapse: collapse;
 }

 .table-box th,
 .table-box td {
     padding: 14px 0;
     border-bottom: 1px solid var(--border);
     text-align: left;
     vertical-align: top;
 }

 .table-box th {
     color: var(--text);
 }

 .tool-form {
     display: grid;
     gap: 18px;
 }

 .question-card {
     padding: 22px;
 }

 .question-card legend,
 .input-group label {
     font-weight: 700;
     color: var(--text);
     margin-bottom: 10px;
 }

 .option-list {
     display: grid;
     gap: 12px;
     margin-top: 14px;
 }

 .option-list label,
 .input-group {
     display: grid;
     gap: 8px;
     color: var(--text-secondary);
 }

 .option-list label {
     grid-template-columns: 18px 1fr;
     align-items: start;
 }

 .input-group input,
 .input-group select {
     width: 100%;
     padding: 13px 14px;
     border-radius: 14px;
     border: 1px solid var(--border);
     background: #fff;
 }

 .input-row {
     display: grid;
     grid-template-columns: repeat(2, minmax(0, 1fr));
     gap: 16px;
 }

 .result-card {
     padding: 24px;
     margin-top: 18px;
     border-color: var(--reading-border);
     background: linear-gradient(180deg, rgba(255, 255, 255, 0.98), rgba(247, 241, 236, 0.95));
 }

 .result-card[hidden] {
     display: none;
 }

 .result-card h3 {
     margin-bottom: 12px;
     font-size: 1.5rem;
 }

 .result-card p,
 .result-card li {
     color: var(--text-secondary);
     line-height: 1.8;
 }

 .result-card ul {
     margin-top: 12px;
     padding-left: 1.2rem;
 }

 .timeline {
     display: grid;
     gap: 16px;
 }

 .timeline-item {
     padding: 22px;
 }

 .list-links {
     display: grid;
     gap: 14px;
 }

 .list-links a {
     display: flex;
     justify-content: space-between;
     align-items: center;
     padding: 16px 18px;
     border: 1px solid var(--border);
     border-radius: 16px;
     background: rgba(255, 255, 255, 0.8);
     color: var(--text);
 }

 .list-links a:hover {
     border-color: var(--site-accent);
     text-decoration: none;
 }

 .page-join {
     padding-bottom: 72px;
 }

 .join-box {
     display: grid;
     grid-template-columns: minmax(0, 1.3fr) minmax(280px, 0.7fr);
     gap: 22px;
     padding: 28px;
     border: 1px solid var(--reading-border);
     border-radius: 28px;
     background: linear-gradient(180deg, rgba(255, 255, 255, 0.94), rgba(247, 241, 236, 0.94));
     box-shadow: var(--shadow-md);
 }

 .join-main p,
 .join-side p,
 .join-note {
     color: var(--text-secondary);
     line-height: 1.8;
 }

 .wechat-grid,
 .side-links {
     display: grid;
     gap: 12px;
     margin-top: 18px;
 }

 .wechat-item,
 .side-links a {
     display: flex;
     justify-content: space-between;
     align-items: center;
     gap: 18px;
     padding: 16px 18px;
     border-radius: 18px;
     background: rgba(255, 255, 255, 0.82);
     border: 1px solid var(--reading-border);
     color: var(--text);
 }

 .wechat-id {
     font-family: var(--font-mono);
     color: var(--site-accent);
 }

 .page-footer-note {
     padding-top: 0;
     color: var(--text-tertiary);
     font-size: var(--text-sm);
 }

 @media (max-width: 900px) {

     .page-hero-grid,
     .join-box,
     .card-grid,
     .card-grid.two-col,
     .metric-grid,
     .input-row {
         grid-template-columns: 1fr;
     }

     .readingclub-shell {
         width: min(100% - 28px, 1120px);
     }

     .page-hero {
         padding-top: 78px;
     }
 }

 @media (max-width: 640px) {

     .hero-actions,
     .site-links,
     .section-header {
         align-items: start;
     }

     .section-header {
         flex-direction: column;
     }

     .page-hero h1 {
         font-size: 2.3rem;
     }

     .primary-btn,
     .secondary-btn {
         width: 100%;
     }
 }