:root {
    --primary-color: #2563eb;
    --primary-dark: #1d4ed8;
    --secondary-color: #64748b;
    --accent-color: #f59e0b;
    --bg-color: #ffffff;
    --bg-secondary: #f8fafc;
    --text-color: #1e293b;
    --text-secondary: #64748b;
    --border-color: #e2e8f0;
    --card-bg: #ffffff;
    --hover-color: rgba(37, 99, 235, 0.1);
    --shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --font-serif: 'Noto Serif SC', serif;
    --font-sans: 'Roboto', sans-serif;
    --font-size-base: 16px;
    --font-size-lg: 18px;
    --font-size-xl: 24px;
    --line-height-base: 1.6;
    --transition: all 0.3s ease;
}

[data-theme="dark"] {
    --bg-color: #0f172a;
    --bg-secondary: #1e293b;
    --text-color: #f1f5f9;
    --text-secondary: #94a3b8;
    --border-color: #334155;
    --card-bg: #1e293b;
    --hover-color: rgba(37, 99, 235, 0.2);
    --shadow: 0 1px 3px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.3);
}

[data-theme="sepia"] {
    --bg-color: #fefcf5;
    --bg-secondary: #f5f0e6;
    --text-color: #3d3d3d;
    --text-secondary: #6b6b6b;
    --border-color: #e8e0d0;
    --card-bg: #fefcf5;
    --hover-color: rgba(37, 99, 235, 0.08);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-sans);
    font-size: var(--font-size-base);
    line-height: var(--line-height-base);
    color: var(--text-color);
    background-color: var(--bg-color);
    transition: var(--transition);
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.navbar {
    background-color: var(--bg-color);
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 1000;
    transition: var(--transition);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 60px;
}

.nav-logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 8px;
}

.nav-logo i {
    font-size: 1.2rem;
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: 30px;
}

.nav-link {
    text-decoration: none;
    color: var(--text-color);
    font-weight: 500;
    transition: var(--transition);
    position: relative;
}

.nav-link:hover,
.nav-link.active {
    color: var(--primary-color);
}

.nav-link.active::after {
    content: '';
    position: absolute;
    bottom: -8px;
    left: 0;
    width: 100%;
    height: 2px;
    background-color: var(--primary-color);
}

.theme-toggle {
    background: none;
    border: none;
    color: var(--text-color);
    font-size: 1.2rem;
    cursor: pointer;
    padding: 8px;
    border-radius: 50%;
    transition: var(--transition);
}

.theme-toggle:hover {
    background-color: var(--hover-color);
}

.nav-toggle {
    display: none;
    background: none;
    border: none;
    color: var(--text-color);
    font-size: 1.5rem;
    cursor: pointer;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 12px 24px;
    border: none;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    text-decoration: none;
    transition: var(--transition);
    gap: 8px;
}

.btn-primary {
    background-color: var(--primary-color);
    color: white;
}

.btn-primary:hover {
    background-color: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn-secondary {
    background-color: var(--bg-secondary);
    color: var(--text-color);
    border: 1px solid var(--border-color);
}

.btn-secondary:hover {
    background-color: var(--hover-color);
}

.hero {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
    color: white;
    padding: 80px 20px;
    text-align: center;
}

.hero-content h1 {
    font-size: 3rem;
    margin-bottom: 20px;
    font-weight: 700;
}

.hero-content p {
    font-size: 1.2rem;
    margin-bottom: 30px;
    opacity: 0.9;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.section-title {
    font-size: 2rem;
    margin-bottom: 30px;
    text-align: center;
    color: var(--text-color);
}

.novel-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 30px;
    margin-bottom: 40px;
}

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

.novel-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.novel-card-cover {
    height: 200px;
    overflow: hidden;
    position: relative;
}

.novel-card-cover img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition);
}

.novel-card:hover .novel-card-cover img {
    transform: scale(1.05);
}

.novel-card-badge {
    position: absolute;
    top: 10px;
    left: 10px;
    background-color: rgba(0, 0, 0, 0.7);
    color: white;
    padding: 4px 10px;
    border-radius: 4px;
    font-size: 0.8rem;
}

.novel-card-content {
    padding: 20px;
}

.novel-card-title {
    font-size: 1.2rem;
    font-weight: 700;
    margin-bottom: 8px;
    color: var(--text-color);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.novel-card-author {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-bottom: 10px;
}

.novel-card-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 5px;
    margin-bottom: 12px;
}

.novel-card-tag {
    background-color: var(--hover-color);
    color: var(--primary-color);
    padding: 4px 8px;
    border-radius: 4px;
    font-size: 0.75rem;
}

.novel-card-stats {
    display: flex;
    justify-content: space-between;
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.ad-container {
    margin: 40px 0;
    display: flex;
    justify-content: center;
}

.ad-placeholder {
    background-color: var(--bg-secondary);
    border: 2px dashed var(--border-color);
    border-radius: 8px;
    padding: 20px;
    text-align: center;
    color: var(--text-secondary);
    font-size: 0.9rem;
    min-width: 300px;
    max-width: 728px;
    width: 100%;
}

.latest {
    padding: 40px 20px;
}

.chapter-list {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.chapter-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 15px 20px;
    background-color: var(--card-bg);
    border-radius: 8px;
    border: 1px solid var(--border-color);
    transition: var(--transition);
    cursor: pointer;
}

.chapter-item:hover {
    background-color: var(--hover-color);
    border-color: var(--primary-color);
}

.chapter-item-left {
    display: flex;
    align-items: center;
    gap: 15px;
}

.chapter-item-cover {
    width: 50px;
    height: 70px;
    border-radius: 4px;
    overflow: hidden;
}

.chapter-item-cover img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.chapter-item-info h4 {
    color: var(--text-color);
    margin-bottom: 4px;
}

.chapter-item-info p {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.chapter-item-time {
    color: var(--text-secondary);
    font-size: 0.85rem;
}

.page-header {
    padding: 40px 20px;
    text-align: center;
    border-bottom: 1px solid var(--border-color);
}

.page-header h1 {
    font-size: 2.5rem;
    margin-bottom: 10px;
    color: var(--text-color);
}

.page-header p {
    color: var(--text-secondary);
}

.filter-bar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 30px;
    flex-wrap: wrap;
    gap: 15px;
}

.search-box {
    display: flex;
    align-items: center;
    background-color: var(--bg-secondary);
    border-radius: 8px;
    overflow: hidden;
    border: 1px solid var(--border-color);
    flex: 1;
    max-width: 400px;
}

.search-box input {
    flex: 1;
    padding: 12px 15px;
    border: none;
    background: none;
    color: var(--text-color);
    font-size: 1rem;
    outline: none;
}

.search-box input::placeholder {
    color: var(--text-secondary);
}

.search-box button {
    background-color: var(--primary-color);
    color: white;
    border: none;
    padding: 12px 20px;
    cursor: pointer;
    transition: var(--transition);
}

.search-box button:hover {
    background-color: var(--primary-dark);
}

.filter-options {
    display: flex;
    gap: 15px;
}

.filter-options select {
    padding: 12px 15px;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    background-color: var(--bg-color);
    color: var(--text-color);
    font-size: 1rem;
    cursor: pointer;
    outline: none;
}

.pagination {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 10px;
    margin-top: 40px;
}

.pagination button {
    padding: 10px 15px;
    border: 1px solid var(--border-color);
    background-color: var(--bg-color);
    color: var(--text-color);
    border-radius: 6px;
    cursor: pointer;
    transition: var(--transition);
}

.pagination button:hover,
.pagination button.active {
    background-color: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
}

.novel-detail {
    padding: 40px 20px;
}

.novel-info {
    display: flex;
    gap: 40px;
    flex-wrap: wrap;
}

.novel-cover {
    flex-shrink: 0;
}

.novel-cover img {
    width: 300px;
    height: 400px;
    object-fit: cover;
    border-radius: 12px;
    box-shadow: var(--shadow-lg);
}

.novel-meta {
    flex: 1;
    min-width: 300px;
}

.novel-meta h1 {
    font-size: 2.5rem;
    margin-bottom: 15px;
    color: var(--text-color);
}

.novel-author {
    font-size: 1.2rem;
    color: var(--text-secondary);
    margin-bottom: 15px;
}

.novel-tags {
    display: flex;
    gap: 10px;
    margin-bottom: 20px;
}

.novel-tags span {
    padding: 8px 15px;
    border-radius: 20px;
    font-size: 0.9rem;
}

.novel-tags span:first-child {
    background-color: var(--hover-color);
    color: var(--primary-color);
}

.novel-tags span:last-child {
    background-color: var(--accent-color);
    color: white;
}

.novel-stats {
    display: flex;
    gap: 30px;
    margin-bottom: 25px;
}

.stat-item {
    display: flex;
    align-items: center;
    gap: 8px;
    color: var(--text-secondary);
}

.stat-item i {
    color: var(--primary-color);
}

.novel-description {
    font-size: 1.1rem;
    line-height: 1.8;
    color: var(--text-color);
    margin-bottom: 30px;
}

.novel-actions {
    display: flex;
    gap: 15px;
    flex-wrap: wrap;
}

.chapters-list {
    padding: 40px 20px;
}

.chapters-content {
    background-color: var(--card-bg);
    border-radius: 12px;
    padding: 30px;
    border: 1px solid var(--border-color);
}

.chapter-nav {
    display: flex;
    justify-content: space-between;
    margin-bottom: 20px;
}

.chapter-filter {
    margin-bottom: 20px;
}

.chapter-filter select {
    width: 100%;
    padding: 12px 15px;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    background-color: var(--bg-color);
    color: var(--text-color);
    font-size: 1rem;
}

.chapter-items {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 10px;
}

.chapter-item-link {
    display: block;
    padding: 12px 15px;
    background-color: var(--bg-secondary);
    border-radius: 6px;
    text-decoration: none;
    color: var(--text-color);
    transition: var(--transition);
    font-size: 0.95rem;
}

.chapter-item-link:hover {
    background-color: var(--hover-color);
    color: var(--primary-color);
}

.reading-mode {
    background-color: var(--bg-color);
}

.reading-header {
    background-color: rgba(var(--bg-color), 0.95);
    backdrop-filter: blur(10px);
}

.reading-header .nav-container {
    justify-content: space-between;
}

.nav-left,
.nav-right {
    display: flex;
    align-items: center;
    gap: 15px;
}

.nav-btn {
    background: none;
    border: none;
    color: var(--text-color);
    font-size: 1.2rem;
    cursor: pointer;
    padding: 8px;
    border-radius: 50%;
    transition: var(--transition);
}

.nav-btn:hover {
    background-color: var(--hover-color);
}

.reading-logo {
    font-size: 1.2rem;
}

.nav-center {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.reading-content {
    padding: 40px 20px;
}

.chapter-header {
    text-align: center;
    margin-bottom: 30px;
}

.chapter-header h1 {
    font-size: 2rem;
    margin-bottom: 10px;
    color: var(--text-color);
}

.chapter-meta {
    color: var(--text-secondary);
    font-size: 1rem;
}

.chapter-meta .divider {
    margin: 0 10px;
}

.reading-toolbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 30px;
    padding: 15px 20px;
    background-color: var(--bg-secondary);
    border-radius: 8px;
    flex-wrap: wrap;
    gap: 15px;
}

.toolbar-left,
.toolbar-right {
    display: flex;
    align-items: center;
    gap: 10px;
}

.toolbar-btn {
    background: none;
    border: none;
    color: var(--text-color);
    font-size: 0.9rem;
    cursor: pointer;
    padding: 8px 12px;
    border-radius: 6px;
    transition: var(--transition);
}

.toolbar-btn:hover {
    background-color: var(--hover-color);
}

.reading-toolbar select {
    padding: 8px 12px;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    background-color: var(--bg-color);
    color: var(--text-color);
}

.chapter-content {
    font-family: var(--font-serif);
    font-size: 1.1rem;
    line-height: 1.8;
    color: var(--text-color);
    max-width: 800px;
    margin: 0 auto;
    padding: 20px;
}

.chapter-content p {
    margin-bottom: 20px;
    text-indent: 2em;
}

.chapter-nav-buttons {
    display: flex;
    justify-content: center;
    gap: 20px;
    margin-top: 40px;
    flex-wrap: wrap;
}

.reading-progress-bar {
    margin-top: 40px;
}

.progress-track {
    height: 6px;
    background-color: var(--bg-secondary);
    border-radius: 3px;
    overflow: hidden;
}

.progress-fill {
    height: 100%;
    background-color: var(--primary-color);
    width: 0%;
    transition: width 0.3s ease;
}

.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    z-index: 2000;
    justify-content: center;
    align-items: center;
}

.modal.active {
    display: flex;
}

.modal-content {
    background-color: var(--card-bg);
    border-radius: 12px;
    width: 90%;
    max-width: 600px;
    max-height: 80vh;
    overflow: hidden;
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px;
    border-bottom: 1px solid var(--border-color);
}

.modal-header h3 {
    font-size: 1.2rem;
    color: var(--text-color);
}

.modal-close {
    background: none;
    border: none;
    color: var(--text-secondary);
    font-size: 1.5rem;
    cursor: pointer;
}

.modal-body {
    padding: 20px;
    overflow-y: auto;
    max-height: 60vh;
}

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

.toc-item {
    padding: 12px 15px;
    background-color: var(--bg-secondary);
    border-radius: 6px;
    cursor: pointer;
    transition: var(--transition);
}

.toc-item:hover {
    background-color: var(--hover-color);
}

.toc-item.active {
    background-color: var(--hover-color);
    border-left: 4px solid var(--primary-color);
}

.setting-item {
    margin-bottom: 25px;
}

.setting-item label {
    display: block;
    margin-bottom: 10px;
    color: var(--text-color);
    font-weight: 500;
}

.setting-item input[type="range"] {
    width: 100%;
    margin-bottom: 8px;
}

.setting-item span {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.theme-options {
    display: flex;
    gap: 15px;
}

.theme-option {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    padding: 15px 20px;
    border: 2px solid var(--border-color);
    border-radius: 8px;
    background-color: var(--bg-secondary);
    cursor: pointer;
    transition: var(--transition);
}

.theme-option:hover,
.theme-option.active {
    border-color: var(--primary-color);
}

.theme-preview {
    width: 40px;
    height: 40px;
    border-radius: 50%;
}

.light-preview {
    background-color: #ffffff;
    border: 1px solid #e2e8f0;
}

.dark-preview {
    background-color: #0f172a;
    border: 1px solid #334155;
}

.sepia-preview {
    background-color: #fefcf5;
    border: 1px solid #e8e0d0;
}

.about-content {
    padding: 40px 20px;
}

.about-section {
    margin-bottom: 40px;
}

.about-section h2 {
    font-size: 1.8rem;
    margin-bottom: 20px;
    color: var(--text-color);
}

.about-section p {
    font-size: 1.1rem;
    line-height: 1.8;
    color: var(--text-color);
    max-width: 800px;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: 25px;
    margin-top: 30px;
}

.feature-item {
    text-align: center;
    padding: 30px;
    background-color: var(--card-bg);
    border-radius: 12px;
    border: 1px solid var(--border-color);
}

.feature-item i {
    font-size: 2.5rem;
    color: var(--primary-color);
    margin-bottom: 15px;
}

.feature-item h3 {
    font-size: 1.2rem;
    margin-bottom: 10px;
    color: var(--text-color);
}

.feature-item p {
    font-size: 0.95rem;
    color: var(--text-secondary);
    line-height: 1.6;
}

footer {
    background-color: var(--bg-secondary);
    padding: 40px 20px;
    margin-top: 40px;
    border-top: 1px solid var(--border-color);
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: 30px;
    margin-bottom: 30px;
}

.footer-section h3 {
    font-size: 1.2rem;
    margin-bottom: 15px;
    color: var(--text-color);
}

.footer-section p {
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: 15px;
}

.footer-section ul {
    list-style: none;
}

.footer-section ul li {
    margin-bottom: 10px;
}

.footer-section ul li a {
    color: var(--text-secondary);
    text-decoration: none;
    transition: var(--transition);
}

.footer-section ul li a:hover {
    color: var(--primary-color);
}

.social-links {
    display: flex;
    gap: 15px;
}

.social-links a {
    color: var(--text-secondary);
    font-size: 1.5rem;
    transition: var(--transition);
}

.social-links a:hover {
    color: var(--primary-color);
}

.footer-bottom {
    text-align: center;
    padding-top: 20px;
    border-top: 1px solid var(--border-color);
    color: var(--text-secondary);
}

@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        top: 60px;
        left: -100%;
        width: 100%;
        background-color: var(--bg-color);
        flex-direction: column;
        padding: 20px;
        gap: 15px;
        transition: var(--transition);
        box-shadow: var(--shadow-lg);
    }

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

    .nav-toggle {
        display: block;
    }

    .hero-content h1 {
        font-size: 2rem;
    }

    .hero-content p {
        font-size: 1rem;
    }

    .novel-grid {
        grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
        gap: 20px;
    }

    .novel-info {
        flex-direction: column;
        align-items: center;
    }

    .novel-cover img {
        width: 250px;
        height: 350px;
    }

    .novel-meta h1 {
        font-size: 2rem;
        text-align: center;
    }

    .novel-stats {
        justify-content: center;
    }

    .filter-bar {
        flex-direction: column;
        align-items: stretch;
    }

    .search-box {
        max-width: 100%;
    }

    .filter-options {
        justify-content: center;
    }

    .chapter-items {
        grid-template-columns: 1fr;
    }

    .chapter-nav {
        flex-direction: column;
        gap: 10px;
    }

    .reading-toolbar {
        flex-direction: column;
        align-items: stretch;
    }

    .footer-content {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .social-links {
        justify-content: center;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 15px;
    }

    .hero {
        padding: 60px 15px;
    }

    .hero-content h1 {
        font-size: 1.5rem;
    }

    .novel-grid {
        grid-template-columns: 1fr;
    }

    .novel-card-cover {
        height: 250px;
    }

    .ad-placeholder {
        min-width: 100%;
        padding: 15px;
    }
}