:root {
    --color-bg: #F7F7F7;
    --color-bg-secondary: #F0F0F0;
    
    /* 金色主色系 - 统一使用这组金色 */
    --color-gold: #C9A227;
    --color-gold-light: #E8C547;
    --color-gold-dark: #A68B1F;
    --color-gold-50: #FDF8E8;
    --color-gold-100: #F9F0C8;
    --color-gold-200: #F3E4A0;
    
    --color-text-primary: #1A1A1A;
    --color-text-secondary: #666666;
    --color-text-muted: #999999;
    --color-white: #FFFFFF;
    --color-accent: #FF6B6B;
    --color-accent-dark: #f24d4d;
    --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
    --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.1);
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 16px;
    --radius-full: 9999px;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    -webkit-tap-highlight-color: transparent;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
    background: var(--color-bg);
    color: var(--color-text-primary);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

/* 顶部导航栏 - 滚动后显示 */
.top-nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: 48px;
    background: var(--color-white);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 12px;
    z-index: 1000;
    opacity: 0;
    transform: translateY(-100%);
    transition: all 0.3s ease;
    box-shadow: 0 1px 0 rgba(0,0,0,0.05);
}

.top-nav.visible {
    opacity: 1;
    transform: translateY(0);
}

.nav-back {
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-text-primary);
    text-decoration: none;
}

.nav-title {
    font-size: 16px;
    font-weight: 600;
    color: var(--color-text-primary);
    flex: 1;
    text-align: center;
}

.nav-actions {
    display: flex;
    gap: 4px;
}

.nav-btn {
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: none;
    border: none;
    color: var(--color-text-primary);
    cursor: pointer;
}

/* 首屏区域 */
.hero {
    background: var(--color-white);
    position: relative;
    padding-bottom: 20px;
}

/* 首屏透明导航栏 */
.hero-nav {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 12px;
    z-index: 100;
}

.hero-nav-back,
.hero-nav-btn {
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(255,255,255,0.9);
    border-radius: 50%;
    color: var(--color-text-primary);
    text-decoration: none;
    border: none;
    cursor: pointer;
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
}

/* 书籍封面区域 */
.book-gallery {
    position: relative;
    background: linear-gradient(180deg, #F0F0F0 0%, var(--color-white) 100%);
    padding: 68px 20px 40px;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.gallery-slider {
    width: 100%;
    max-width: 200px;
    display: flex;
    justify-content: center;
}

.gallery-item {
    display: none;
}

.gallery-item.active {
    display: block;
}

.book-cover-img {
    width: 100%;
    max-width: 180px;
    border-radius: 15px;
    box-shadow: 0 8px 24px rgba(0,0,0,0.15);
}

.gallery-indicator {
    position: absolute;
    bottom: 16px;
    right: 20px;
    background: rgba(0,0,0,0.4);
    color: var(--color-white);
    padding: 4px 10px;
    border-radius: var(--radius-full);
    font-size: 12px;
}

.indicator-separator {
    margin: 0 2px;
    opacity: 0.7;
}

/* 书籍信息 */
.book-info {
    padding: 0 20px;
    text-align: center;
}

.book-category {
    margin-bottom: 12px;
}

.category-tag {
    display: inline-block;
    padding: 4px 12px;
    background: #F0F0F0;
    border-radius: var(--radius-full);
    font-size: 13px;
    color: var(--color-text-secondary);
}

.book-title {
    font-size: 22px;
    font-weight: 700;
    color: var(--color-text-primary);
    line-height: 1.4;
    margin-bottom: 8px;
}

.book-author {
    font-size: 14px;
    color: var(--color-text-secondary);
    margin-bottom: 20px;
}

/* 格式选择 */
.format-selector {
    display: flex;
    justify-content: center;
    gap: 10px;
    flex-wrap: wrap;
}

.format-btn {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 8px 14px;
    background: #F5F5F5;
    border: 1px solid transparent;
    border-radius: var(--radius-full);
    font-size: 13px;
    color: var(--color-text-secondary);
    cursor: pointer;
    transition: all 0.2s ease;
}

.format-btn.active {
    background: #FFF5F5;
    border-color: var(--color-accent);
    color: var(--color-accent);
}

.format-btn svg {
    stroke-width: 1.5;
}

.quiz-btn {
    color: var(--color-accent);
    background: #FFF5F5;
}

/* 书籍详情导航栏 */
.book-tabs {
    display: flex;
    background: var(--color-white);
    border-bottom: 1px solid #F0F0F0;
    position: sticky;
    top: 48px;
    z-index: 99;
}

.book-tabs.sticky {
    box-shadow: 0 2px 8px rgba(0,0,0,0.05);
}

.tab-item {
    flex: 1;
    padding: 14px 0;
    text-align: center;
    font-size: 15px;
    color: var(--color-text-secondary);
    cursor: pointer;
    position: relative;
    transition: all 0.2s ease;
    text-decoration: none;
    display: flex;
    align-items: center;
    justify-content: center;
}

.tab-item.active {
    color: var(--color-text-primary);
    font-weight: 600;
}

.tab-item.active::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 24px;
    height: 3px;
    background: var(--color-text-primary);
    border-radius: 2px;
}

/* Tab内容区 */
.tab-content {
    display: none;
    background: var(--color-white);
}

.tab-content.active {
    display: block;
}

/* 内容区块 */
.section-block {
    padding: 20px;
    border-bottom: 1px solid #F5F5F5;
}

.block-title {
    font-size: 17px;
    font-weight: 700;
    color: var(--color-text-primary);
    margin-bottom: 12px;
}

.block-text {
    font-size: 14px;
    color: var(--color-text-secondary);
    line-height: 1.8;
}

.intro-container {
    position: relative;
    max-height: 7.2em;
    overflow: hidden;
}

.intro-container::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 2em;
    background: linear-gradient(to bottom, rgba(255,255,255,0) 0%, rgba(255,255,255,0.8) 50%, rgba(255,255,255,1) 100%);
    pointer-events: none;
}

.intro-container.expanded {
    max-height: none;
}

.intro-container.expanded::after {
    display: none;
}

.intro-container .block-text {
    -webkit-line-clamp: 3;
    display: -webkit-box;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.intro-container.expanded .block-text {
    -webkit-line-clamp: unset;
    display: block;
}

.expand-btn-wrapper {
    margin-top: 4px;
}

.expand-btn {
    display: inline-flex;
    align-items: center;
    gap: 2px;
    padding: 0;
    background: none;
    border: none;
    font-size: 13px;
    color: #999;
    cursor: pointer;
    transition: color 0.2s ease;
}

.expand-btn:hover {
    color: #666;
    background: none;
}

.expand-btn-icon {
    width: 12px;
    height: 12px;
    transition: transform 0.3s ease;
}

.expand-btn.expanded .expand-btn-icon {
    transform: rotate(180deg);
}

/* 作者区块 */
.author-block {
    border-bottom: none;
}

.author-info {
    display: flex;
    align-items: center;
    gap: 12px;
}

.author-avatar-img {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    object-fit: cover;
    flex-shrink: 0;
}

.author-detail {
    flex: 1;
}

.author-detail .author-name {
    font-size: 15px;
    font-weight: 600;
    color: var(--color-text-primary);
}

.author-detail .author-title {
    font-size: 13px;
    color: var(--color-text-muted);
    margin-top: 2px;
}

/* 底部购买栏 */
.bottom-buy-bar {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: var(--color-white);
    padding: 10px 16px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    box-shadow: 0 -2px 10px rgba(0,0,0,0.08);
    z-index: 100;
}

.buy-left {
    display: flex;
    align-items: baseline;
    gap: 6px;
}

.buy-price {
    display: flex;
    align-items: baseline;
    gap: 4px;
}

.price-symbol {
    font-size: 14px;
    color: var(--color-accent);
    font-weight: 600;
}

.price-num {
    font-size: 24px;
    font-weight: 700;
    color: var(--color-accent-dark);
    line-height: 1;
}

.price-original {
    font-size: 14px;
    color: var(--color-text-muted);
    text-decoration: line-through;
    margin-left: 4px;
}

.btn-buy {
    padding: 12px 32px;
    background: #1A1A1A;
    color: var(--color-white);
    font-size: 15px;
    font-weight: 600;
    border: none;
    border-radius: var(--radius-full);
    cursor: pointer;
    transition: all 0.2s ease;
}

.btn-buy:active {
    transform: scale(0.98);
    opacity: 0.9;
}

.bottom-spacer {
    height: 70px;
}

/* 章节标题 */
.section-title {
    font-size: 20px;
    font-weight: 700;
    margin-bottom: 20px;
    color: var(--color-text-primary);
}

/* 模块通用样式 */
.section {
    padding: 24px 20px;
    background: var(--color-white);
    margin-top: 8px;
}

/* 你将获得 */
.benefits-section {
    background: var(--color-white);
}

.benefit-item {
    background: var(--color-white);
    border-radius: var(--radius-md);
    padding: 20px;
    margin-bottom: 12px;
    border: 1px solid #F0F0F0;
}

.benefit-item:last-child {
    margin-bottom: 0;
}

.benefit-item h3 {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 4px;
    color: var(--color-text-primary);
    display: flex;
    align-items: center;
    gap: 10px;
    line-height: 1;
}

.benefit-item p {
    font-size: 14px;
    color: var(--color-text-secondary);
    line-height: 1.6;
}

/* 目标读者 */
.target-section {
    background: var(--color-white);
}

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

.target-item {
    background: var(--color-white);
    padding: 16px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    gap: 14px;
    border: 1px solid #F0F0F0;
}

.target-icon {
    width: 40px;
    height: 40px;
    background: #F0F0F0;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
    flex-shrink: 0;
}

.target-text {
    font-size: 14px;
    color: var(--color-text-primary);
    font-weight: 500;
}

/* 痛点区域 */
.pain-section {
    background: var(--color-white);
}

.pain-grid {
    display: grid;
    gap: 12px;
}

.pain-card {
    background: var(--color-white);
    padding: 18px;
    border-radius: var(--radius-md);
    border: 1px solid #F0F0F0;
}

.pain-card h3 {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 6px;
    color: var(--color-text-primary);
    display: flex;
    align-items: center;
    gap: 6px;
}

.pain-icon {
    width: 17px;
    height: 17px;
    background: #e84143;
    border-radius: 50%;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    position: relative;
}

.pain-icon::before,
.pain-icon::after {
    content: '';
    position: absolute;
    width: 10px;
    height: 2px;
    background: white;
    border-radius: 1px;
}

.pain-icon::before {
    transform: rotate(45deg);
}

.pain-icon::after {
    transform: rotate(-45deg);
}

.pain-card p {
    font-size: 14px;
    color: var(--color-text-secondary);
    line-height: 1.7;
}

/* 书籍特色 */
.features-section {
    background: var(--color-white);
}

.feature-card {
    background: var(--color-white);
    border-radius: var(--radius-md);
    padding: 20px;
    margin-bottom: 12px;
    border: 1px solid #F0F0F0;
}

.feature-card:last-child {
    margin-bottom: 0;
}

.feature-card h3 {
    font-size: 16px;
    font-weight: 700;
    margin-bottom: 8px;
    color: var(--color-text-primary);
    display: flex;
    align-items: center;
    gap: 10px;
}

.feature-number {
    width: 4px;
    height: 18px;
    background: var(--color-gold);
    border-radius: 2px;
    flex-shrink: 0;
    display: inline-block;
    vertical-align: middle;
}

.benefit-icon {
    width: 20px;
    height: 20px;
    color: var(--color-gold);
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: center;
}

.feature-card p {
    font-size: 14px;
    color: var(--color-text-secondary);
    line-height: 1.7;
}

/* 书中精华 - 左右滑动 */
.quotes-section {
    background: var(--color-bg);
}

.quotes-section .section-title {
    color: var(--color-text-primary);
}

.quotes-slider {
    overflow-x: auto;
    overflow-y: hidden;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
    -ms-overflow-style: none;
    margin: 0 -20px;
    padding: 0 20px;
}

.quotes-slider::-webkit-scrollbar {
    display: none;
}

.quotes-track {
    display: flex;
    gap: 12px;
    width: max-content;
}

.quote-card {
    background: var(--color-white);
    border-radius: var(--radius-md);
    padding: 20px;
    width: 280px;
    flex-shrink: 0;
    box-shadow: 0 2px 8px rgba(0,0,0,0.04);
    display: flex;
    flex-direction: column;
    min-height: 320px;
}

.quote-icon {
    font-size: 48px;
    color: var(--color-gold);
    line-height: 1;
    margin-bottom: 12px;
    font-family: Georgia, serif;
}

.quote-text {
    font-size: 15px;
    line-height: 1.8;
    color: var(--color-text-primary);
    margin-bottom: 16px;
    flex: 1;
}

.quote-divider {
    width: 100%;
    height: 1px;
    background: repeating-linear-gradient(
        to right,
        #E0E0E0 0px,
        #E0E0E0 4px,
        transparent 4px,
        transparent 8px
    );
    margin-bottom: 12px;
}

.quote-footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-top: auto;
}

.quote-page {
    font-size: 13px;
    color: var(--color-text-muted);
}

.quote-share {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 6px 14px;
    background: var(--color-gold);
    border: none;
    border-radius: var(--radius-full);
    font-size: 12px;
    color: var(--color-white);
    cursor: pointer;
}

.quote-share svg {
    stroke-width: 2;
}

.quote-share svg {
    stroke-width: 1.5;
}

.quotes-tip {
    font-size: 12px;
    color: var(--color-text-muted);
    text-align: center;
    margin-top: 16px;
}

/* 读者评价 */
.reviews-section {
    background: var(--color-white);
}

.review-card {
    background: var(--color-white);
    border-radius: var(--radius-md);
    padding: 16px;
    margin-bottom: 12px;
    border: 1px solid #F0F0F0;
}

.review-card:last-child {
    margin-bottom: 0;
}

.review-header {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 10px;
}

.review-avatar {
    width: 36px;
    height: 36px;
    background: var(--color-gold-light);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 14px;
    font-weight: 600;
    color: var(--color-text-primary);
}

.review-avatar-img {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    object-fit: cover;
    flex-shrink: 0;
}

.review-info {
    flex: 1;
}

.review-name {
    font-size: 14px;
    font-weight: 600;
    color: var(--color-text-primary);
}

.review-date {
    font-size: 12px;
    color: var(--color-text-muted);
}

.review-stars {
    color: var(--color-gold);
    font-size: 13px;
}

.review-text {
    font-size: 14px;
    color: var(--color-text-secondary);
    line-height: 1.7;
}

/* 目录 */
.toc-section {
    background: var(--color-white);
}

.toc-intro {
    padding: 16px;
    background: var(--color-gold-50);
    border-radius: var(--radius-md);
    margin-bottom: 16px;
}

.toc-intro-title {
    font-size: 15px;
    font-weight: 600;
    color: var(--color-text-primary);
    margin-bottom: 8px;
}

.toc-intro-quote {
    font-size: 13px;
    color: var(--color-text-secondary);
    font-style: italic;
}

.toc-list {
    background: var(--color-white);
    border-radius: var(--radius-md);
    overflow: hidden;
    border: 1px solid #F0F0F0;
}

/* 前言/结语/附录 样式 */
.toc-preface {
    display: flex;
    align-items: center;
    padding: 14px 16px;
    border-bottom: 1px solid #F0F0F0;
    font-size: 15px;
    font-weight: 500;
    color: var(--color-text-primary);
}

.toc-preface:last-child {
    border-bottom: none;
}

/* 篇级折叠容器 */
.toc-part {
    border-bottom: 1px solid #F0F0F0;
}

.toc-part:last-child {
    border-bottom: none;
}

.toc-part-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 14px 16px;
    cursor: pointer;
    background: var(--color-white);
    transition: background 0.2s ease;
}

.toc-part-header:active {
    background: #F9F9F9;
}

.toc-part-title {
    font-size: 16px;
    font-weight: 600;
    color: var(--color-text-primary);
}

.toc-toggle-icon {
    font-size: 12px;
    color: var(--color-text-muted);
    transition: transform 0.3s ease;
}

.toc-part.expanded .toc-toggle-icon {
    transform: rotate(180deg);
}

/* 篇级内容区域 */
.toc-part-content {
    display: none;
    background: #FAFAFA;
    padding: 8px 0;
}

.toc-part.expanded .toc-part-content {
    display: block;
}

/* 章节项 */
.toc-chapter-item {
    display: flex;
    align-items: flex-start;
    padding: 10px 16px 10px 20px;
    gap: 8px;
}

.toc-chapter-num {
    color: var(--color-gold);
    font-weight: 600;
    font-size: 13px;
    flex-shrink: 0;
    white-space: nowrap;
    min-width: 52px;
}

.toc-chapter-title {
    font-size: 14px;
    color: var(--color-text-secondary);
    line-height: 1.5;
    flex: 1;
}

/* 三级目录（小节）样式 */
.toc-section-item {
    display: flex;
    align-items: flex-start;
    padding: 8px 16px 8px 80px;
    gap: 8px;
}

.toc-section-title {
    font-size: 14px;
    color: var(--color-text-muted);
    line-height: 1.5;
    flex: 1;
}

/* FAQ */
.faq-section {
    background: var(--color-white);
}

.faq-list {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.faq-item {
    background: var(--color-white);
    border-radius: var(--radius-md);
    overflow: hidden;
    border: 1px solid #F0F0F0;
}

.faq-question {
    padding: 16px;
    font-size: 16px;
    font-weight: 600;
    display: flex;
    align-items: center;
    justify-content: space-between;
    cursor: pointer;
    color: var(--color-text-primary);
}

.faq-answer {
    padding: 0 16px 16px;
    font-size: 14px;
    color: var(--color-text-secondary);
    line-height: 1.7;
    display: none;
}

.faq-item.active .faq-answer {
    display: block;
}

.faq-icon {
    transition: transform 0.3s ease;
    color: var(--color-text-muted);
    font-size: 12px;
}

.faq-item.active .faq-icon {
    transform: rotate(180deg);
}

/* 弹窗 */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0,0,0,0.75);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    z-index: 2000;
    display: none;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

.modal-overlay.active {
    display: flex;
}

.modal {
    background: var(--color-white);
    border-radius: var(--radius-lg);
    max-width: 360px;
    width: 100%;
    padding: 28px 24px;
    text-align: center;
    position: relative;
    animation: modalIn 0.3s ease;
}

@keyframes modalIn {
    from {
        opacity: 0;
        transform: scale(0.9);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

.modal-title {
    font-size: 20px;
    font-weight: 600;
    text-align: center;
    margin-bottom: 8px;
    color: var(--color-text-primary);
}

.modal-desc {
    text-align: center;
    color: var(--color-text-secondary);
    font-size: 14px;
    margin-bottom: 20px;
}

.modal-qr {
    width: 160px;
    height: 160px;
    background: #F5F5F5;
    border-radius: var(--radius-md);
    margin: 0 auto 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 13px;
    color: var(--color-text-muted);
    overflow: hidden;
}

.modal-qr-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.modal-wechat {
    text-align: center;
    font-size: 15px;
    color: var(--color-text-secondary);
    margin-bottom: 12px;
}

.modal-wechat-id {
    font-weight: 600;
    color: var(--color-text-primary);
}

.btn-copy {
    width: 100%;
    background: #1A1A1A;
    color: var(--color-white);
    border: none;
    padding: 14px;
    font-size: 15px;
    font-weight: 600;
    border-radius: 12px;
    cursor: pointer;
    margin-bottom: 12px;
    transition: all 0.2s ease;
}

.btn-copy:active {
    transform: scale(0.98);
}

.modal-tip {
    text-align: center;
    font-size: 13px;
    color: var(--color-text-muted);
}

.modal-close {
    position: absolute;
    top: 16px;
    right: 16px;
    width: 32px;
    height: 32px;
    border: none;
    background: #F5F5F5;
    border-radius: 50%;
    font-size: 16px;
    color: var(--color-text-secondary);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* 分享卡片弹窗 */
.share-card-modal {
    position: relative;
    padding: 20px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 16px;
}

.share-card-close {
    position: absolute;
    top: 0;
    right: 0;
    width: 36px;
    height: 36px;
    background: rgba(255,255,255,0.9);
    border: none;
    border-radius: 50%;
    font-size: 18px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-text-secondary);
    z-index: 10;
}

.share-card {
    width: 300px;
    min-height: 420px;
    border-radius: var(--radius-lg);
    padding: 24px;
    display: flex;
    flex-direction: column;
    color: var(--color-white);
    transition: background-color 0.3s ease;
}

.share-card-quote {
    font-size: 16px;
    line-height: 1.7;
    font-weight: 500;
    flex: 1;
    margin-bottom: 20px;
    text-shadow: 0 1px 2px rgba(0,0,0,0.1);
}

.share-card-book {
    display: flex;
    align-items: center;
    gap: 12px;
    background: rgba(255,255,255,0.2);
    padding: 12px;
    border-radius: var(--radius-md);
    margin-bottom: 16px;
}

.share-card-cover {
    width: 50px;
    height: 70px;
    border-radius: 4px;
    object-fit: cover;
    box-shadow: 0 2px 8px rgba(0,0,0,0.2);
}

.share-card-book-info {
    flex: 1;
}

.share-card-book-title {
    font-size: 16px;
    font-weight: 600;
    /* margin-bottom: 4px; */
}

.share-card-book-author {
    font-size: 12px;
    opacity: 0.9;
}

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

.share-card-text {
    flex: 1;
}

.share-card-name {
    font-size: 13px;
    font-weight: 600;
    margin-bottom: 4px;
}

.share-card-hint {
    font-size: 11px;
    opacity: 0.9;
}

.share-card-qr {
    width: 70px;
    height: 70px;
    border-radius: 8px;
    object-fit: cover;
    background: var(--color-white);
    padding: 4px;
}

.share-card-refresh {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    padding: 12px 20px;
    background: rgba(255,255,255,0.15);
    border: 1px solid rgba(255,255,255,0.3);
    border-radius: var(--radius-full);
    font-size: 15px;
    color: var(--color-white);
    cursor: pointer;
    font-weight: 600;
    backdrop-filter: blur(4px);
    -webkit-backdrop-filter: blur(4px);
    transition: all 0.2s ease;
}

.share-card-refresh:hover {
    background: rgba(255,255,255,0.25);
}

.share-card-refresh svg {
    stroke-width: 2;
}

.share-card-save {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    padding: 12px 20px;
    background: var(--color-white);
    border: none;
    border-radius: var(--radius-full);
    font-size: 15px;
    color: var(--color-text-primary);
    cursor: pointer;
    font-weight: 600;
    transition: all 0.2s ease;
}

.share-card-save:hover {
    opacity: 0.9;
    transform: scale(0.98);
}

.share-card-buttons {
    display: flex;
    gap: 12px;
    width: 100%;
}

.share-card-buttons button {
    flex: 1;
}

/* 动画效果 */
.fade-in {
    opacity: 0;
    transform: translateY(16px);
    transition: opacity 0.5s ease, transform 0.5s ease;
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

/* 隐藏类 */
.hidden {
    display: none !important;
}

/* 响应式 - 电脑端 */
@media (min-width: 768px) {
    body {
        max-width: 480px;
        margin: 0 auto;
        background: #E5E5E5;
    }
    
    .top-nav,
    .bottom-buy-bar {
        max-width: 480px;
        left: 50%;
        transform: translateX(-50%);
    }
    
    .top-nav.visible {
        transform: translateX(-50%) translateY(0);
    }
}