/* 全局样式重置 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-color: #00D26C;
    --dark-color: #020202;
    --white-color: #FFFFFF;
    --gray-light: #F5F5F5;
    --gray-medium: #999999;
    --shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    --shadow-heavy: 0 4px 16px rgba(0, 0, 0, 0.15);
    --transition: all 0.3s ease;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
    background-color: var(--gray-light);
    color: var(--dark-color);
    line-height: 1.6;
    padding-bottom: 60px;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 16px;
}

/* 顶部导航栏 */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background-color: var(--white-color);
    box-shadow: var(--shadow);
    z-index: 1000;
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 56px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 20px;
    font-weight: bold;
    color: var(--dark-color);
}

.logo i {
    color: var(--primary-color);
    font-size: 24px;
}

.header-actions {
    display: flex;
    gap: 8px;
}

.icon-btn {
    width: 40px;
    height: 40px;
    border: none;
    background: none;
    color: var(--dark-color);
    font-size: 18px;
    cursor: pointer;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
}

.icon-btn:active {
    background-color: var(--gray-light);
}

/* 搜索覆盖层 */
.search-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: var(--white-color);
    z-index: 2000;
    display: none;
    padding-top: 56px;
}

.search-overlay.active {
    display: block;
}

.search-container {
    padding: 16px;
}

.search-box {
    display: flex;
    align-items: center;
    gap: 12px;
    background-color: var(--gray-light);
    border-radius: 24px;
    padding: 12px 16px;
}

.search-box i {
    color: var(--gray-medium);
    font-size: 18px;
}

.search-box input {
    flex: 1;
    border: none;
    background: none;
    outline: none;
    font-size: 16px;
    color: var(--dark-color);
}

.search-box input::placeholder {
    color: var(--gray-medium);
}

.close-btn {
    background: none;
    border: none;
    color: var(--dark-color);
    font-size: 20px;
    cursor: pointer;
    padding: 4px;
}

/* 侧边菜单 */
.side-menu {
    position: fixed;
    top: 0;
    left: -280px;
    width: 280px;
    height: 100vh;
    background-color: var(--white-color);
    z-index: 2001;
    transition: var(--transition);
    box-shadow: var(--shadow-heavy);
}

.side-menu.active {
    left: 0;
}

.menu-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px;
    border-bottom: 1px solid var(--gray-light);
}

.menu-header h3 {
    font-size: 18px;
    font-weight: bold;
}

.menu-nav {
    padding: 8px 0;
}

.menu-item {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 16px 20px;
    color: var(--dark-color);
    text-decoration: none;
    transition: var(--transition);
}

.menu-item i {
    font-size: 20px;
    width: 24px;
    color: var(--gray-medium);
}

.menu-item.active,
.menu-item:active {
    background-color: rgba(0, 210, 108, 0.1);
    color: var(--primary-color);
}

.menu-item.active i,
.menu-item:active i {
    color: var(--primary-color);
}

.menu-item-admin {
    color: var(--primary-color) !important;
    font-weight: bold;
}

.menu-item-admin i {
    color: var(--primary-color) !important;
}

.overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(0, 0, 0, 0.5);
    z-index: 1999;
    display: none;
}

.overlay.active {
    display: block;
}

/* 主内容区域 */
.main-content {
    margin-top: 56px;
    padding: 16px 0;
}

/* 横幅区域 */
.banner-section {
    margin-bottom: 16px;
}

.banner {
    height: 180px;
    background: linear-gradient(135deg, var(--primary-color) 0%, #00B85F 100%);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white-color);
    text-align: center;
    cursor: pointer;
    transition: var(--transition);
    box-shadow: var(--shadow);
}

.banner:active {
    transform: scale(0.98);
}

.banner-content h2 {
    font-size: 32px;
    margin-bottom: 8px;
    font-weight: bold;
}

.banner-content p {
    font-size: 15px;
    opacity: 0.95;
    margin-bottom: 16px;
}

.banner-cta {
    display: flex;
    justify-content: center;
}

.cta-btn {
    display: inline-block;
    background-color: var(--white-color);
    color: var(--primary-color);
    padding: 12px 32px;
    border-radius: 24px;
    font-size: 16px;
    font-weight: bold;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
}

/* 通知卡片 */
.notice-section {
    margin-bottom: 24px;
}

.notice-card {
    background-color: var(--white-color);
    border-radius: 12px;
    padding: 16px;
    display: flex;
    align-items: center;
    gap: 12px;
    box-shadow: var(--shadow);
    cursor: pointer;
    transition: var(--transition);
    border: 2px solid var(--primary-color);
}

.notice-card:active {
    transform: translateY(-2px);
    box-shadow: var(--shadow-heavy);
}

.notice-icon {
    width: 48px;
    height: 48px;
    background: linear-gradient(135deg, var(--primary-color) 0%, #00B85F 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.notice-icon i {
    font-size: 24px;
    color: var(--white-color);
}

.notice-content {
    flex: 1;
}

.notice-content h4 {
    font-size: 16px;
    font-weight: bold;
    margin-bottom: 4px;
    color: var(--dark-color);
}

.notice-content p {
    font-size: 13px;
    color: var(--gray-medium);
}

.notice-arrow {
    flex-shrink: 0;
}

.notice-arrow i {
    font-size: 18px;
    color: var(--primary-color);
}

/* 分类导航 */
.category-section {
    margin-bottom: 24px;
}

.category-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 16px;
    background-color: var(--white-color);
    padding: 16px;
    border-radius: 12px;
}

.category-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    padding: 12px 8px;
    cursor: pointer;
    transition: var(--transition);
    border-radius: 8px;
}

.category-item:active {
    background-color: var(--gray-light);
}

.category-item i {
    font-size: 28px;
    color: var(--primary-color);
}

.category-item span {
    font-size: 13px;
    color: var(--dark-color);
}

/* 书籍区域 */
.book-section {
    margin-bottom: 24px;
}

.section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 16px;
}

.section-header h3 {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 18px;
    font-weight: bold;
}

.section-header h3 i {
    color: var(--primary-color);
}

.more-link {
    display: flex;
    align-items: center;
    gap: 4px;
    font-size: 14px;
    color: var(--gray-medium);
    text-decoration: none;
}

/* 书籍网格 */
.book-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
}

.book-card {
    background-color: var(--white-color);
    border-radius: 12px;
    overflow: hidden;
    box-shadow: var(--shadow);
    cursor: pointer;
    transition: var(--transition);
}

.book-card:active {
    transform: translateY(-2px);
    box-shadow: var(--shadow-heavy);
}

.book-cover {
    position: relative;
    width: 100%;
    padding-top: 140%;
    background-color: var(--gray-light);
}

.cover-placeholder {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, rgba(0, 210, 108, 0.1) 0%, rgba(0, 210, 108, 0.2) 100%);
}

.cover-placeholder i {
    font-size: 48px;
    color: var(--primary-color);
    opacity: 0.5;
}

.book-badge {
    position: absolute;
    top: 8px;
    right: 8px;
    background-color: var(--primary-color);
    color: var(--white-color);
    padding: 4px 8px;
    border-radius: 4px;
    font-size: 12px;
}

.book-badge.hot {
    background: linear-gradient(135deg, #FF6B6B 0%, #FF5252 100%);
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.05);
    }
}

.book-info {
    padding: 12px;
}

.book-title {
    font-size: 15px;
    font-weight: bold;
    margin-bottom: 4px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.book-author {
    font-size: 13px;
    color: var(--gray-medium);
    margin-bottom: 8px;
}

.book-meta {
    display: flex;
    gap: 12px;
    font-size: 12px;
    color: var(--gray-medium);
}

.book-meta span {
    display: flex;
    align-items: center;
    gap: 4px;
}

.free-tag {
    background-color: var(--primary-color);
    color: var(--white-color);
    padding: 2px 8px;
    border-radius: 4px;
    font-size: 11px;
    font-weight: bold;
}

/* 书籍列表 */
.book-list {
    background-color: var(--white-color);
    border-radius: 12px;
    overflow: hidden;
}

.book-list-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px;
    border-bottom: 1px solid var(--gray-light);
    cursor: pointer;
    transition: var(--transition);
}

.book-list-item:last-child {
    border-bottom: none;
}

.book-list-item:active {
    background-color: var(--gray-light);
}

.book-list-cover {
    width: 60px;
    height: 80px;
    background: linear-gradient(135deg, rgba(0, 210, 108, 0.1) 0%, rgba(0, 210, 108, 0.2) 100%);
    border-radius: 6px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.book-list-cover i {
    font-size: 24px;
    color: var(--primary-color);
    opacity: 0.5;
}

.book-list-info {
    flex: 1;
    min-width: 0;
}

.book-list-title {
    font-size: 15px;
    font-weight: bold;
    margin-bottom: 4px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.book-list-author {
    font-size: 13px;
    color: var(--gray-medium);
    margin-bottom: 4px;
}

.book-list-chapter {
    font-size: 12px;
    color: var(--gray-medium);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.book-list-action {
    flex-shrink: 0;
}

.update-time {
    font-size: 12px;
    color: var(--gray-medium);
}

.update-badge {
    display: inline-block;
    background-color: var(--primary-color);
    color: var(--white-color);
    padding: 2px 6px;
    border-radius: 3px;
    font-size: 11px;
    font-weight: bold;
    margin-right: 6px;
}

.read-btn {
    background-color: var(--primary-color);
    color: var(--white-color);
    border: none;
    padding: 8px 16px;
    border-radius: 20px;
    font-size: 13px;
    font-weight: bold;
    cursor: pointer;
    transition: var(--transition);
}

.read-btn:active {
    transform: scale(0.95);
    background-color: #00B85F;
}

/* 排行榜 */
.rank-list {
    background-color: var(--white-color);
    border-radius: 12px;
    overflow: hidden;
}

.rank-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 16px;
    border-bottom: 1px solid var(--gray-light);
    cursor: pointer;
    transition: var(--transition);
}

.rank-item:last-child {
    border-bottom: none;
}

.rank-item:active {
    background-color: var(--gray-light);
}

.rank-number {
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 16px;
    font-weight: bold;
    color: var(--gray-medium);
    flex-shrink: 0;
}

.rank-number.top-rank {
    background-color: var(--primary-color);
    color: var(--white-color);
    border-radius: 6px;
}

.rank-info {
    flex: 1;
    min-width: 0;
}

.rank-title {
    font-size: 15px;
    font-weight: bold;
    margin-bottom: 4px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.rank-author {
    font-size: 13px;
    color: var(--gray-medium);
}

.rank-score {
    display: flex;
    align-items: center;
    gap: 4px;
    color: var(--primary-color);
    font-weight: bold;
    flex-shrink: 0;
}

.rank-score i {
    font-size: 16px;
}

/* 底部导航 */
.bottom-nav {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background-color: var(--white-color);
    box-shadow: 0 -2px 8px rgba(0, 0, 0, 0.1);
    display: flex;
    justify-content: space-around;
    padding: 8px 0;
    z-index: 1000;
}

.nav-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
    padding: 4px 16px;
    color: var(--gray-medium);
    text-decoration: none;
    transition: var(--transition);
}

.nav-item i {
    font-size: 22px;
}

.nav-item span {
    font-size: 12px;
}

.nav-item.active {
    color: var(--primary-color);
}

/* 响应式设计 */
@media (min-width: 768px) {
    .book-grid {
        grid-template-columns: repeat(4, 1fr);
    }

    .category-grid {
        grid-template-columns: repeat(8, 1fr);
    }

    .bottom-nav {
        display: none;
    }

    body {
        padding-bottom: 0;
    }
}

@media (min-width: 1024px) {
    .book-grid {
        grid-template-columns: repeat(5, 1fr);
    }
}

/* 可点击广告元素 */
.clickable-ad {
    cursor: pointer;
    position: relative;
}

.clickable-ad::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    pointer-events: none;
}

/* 滚动条样式 */
::-webkit-scrollbar {
    width: 6px;
}

::-webkit-scrollbar-track {
    background-color: var(--gray-light);
}

::-webkit-scrollbar-thumb {
    background-color: var(--gray-medium);
    border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
    background-color: var(--primary-color);
}