:root {
    --primary: #048998;
    --primary-light: #3bb4c1;
    --border-color: #e3e3e3;
    --bg-light: #f6f5f5;
    --white: #ffffff;
    --text-dark: #1a1a1a;
    --text-gray: #555555;
    --text-light: #777777;
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.06);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.12);
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --transition: 0.25s ease;
    --max-width: 1400px;
    --nav-height: 64px;
}

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

html {
    scroll-behavior: smooth;
    scroll-padding-top: var(--nav-height);
    font-size: 16px;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', 'Noto Sans SC', sans-serif;
    background-color: var(--bg-light);
    color: var(--text-dark);
    line-height: 1.6;
    min-height: 100vh;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

.top-nav {
    position: sticky;
    top: 0;
    z-index: 1000;
    width: 100%;
    height: var(--nav-height);
    background: var(--white);
    border-bottom: 2px solid var(--border-color);
    box-shadow: var(--shadow-sm);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 20px;
    gap: 16px;
    transition: box-shadow var(--transition);
}
.top-nav.scrolled {
    box-shadow: var(--shadow-md);
}
.nav-brand h1 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary);
    letter-spacing: 0.5px;
    white-space: nowrap;
    margin: 0;
    line-height: 1;
}
.nav-brand h1 .brand-icon {
    display: inline-block;
    width: 32px;
    height: 32px;
    vertical-align: middle;
    margin-right: 6px;
    background: var(--primary);
    border-radius: 6px;
    position: relative;
    top: -2px;
}
.nav-links {
    display: flex;
    align-items: center;
    gap: 8px;
    list-style: none;
    flex-wrap: nowrap;
    overflow-x: auto;
    scrollbar-width: none;
    -ms-overflow-style: none;
    flex-shrink: 1;
    min-width: 0;
    padding: 0 4px;
}
.nav-links::-webkit-scrollbar {
    display: none;
}
.nav-links a {
    display: inline-block;
    padding: 8px 14px;
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-dark);
    text-decoration: none;
    border-radius: 20px;
    white-space: nowrap;
    transition: all var(--transition);
    position: relative;
}
.nav-links a:hover,
.nav-links a:focus-visible {
    color: var(--primary);
    background-color: #e8f7f8;
    outline: none;
}
.nav-links a::after {
    content: '';
    position: absolute;
    bottom: 2px;
    left: 50%;
    transform: translateX(-50%) scaleX(0);
    width: 60%;
    height: 2px;
    background: var(--primary);
    border-radius: 2px;
    transition: transform var(--transition);
}
.nav-links a:hover::after {
    transform: translateX(-50%) scaleX(1);
}
.nav-actions {
    display: flex;
    align-items: center;
    gap: 10px;
    flex-shrink: 0;
}
.btn-nav {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 10px 20px;
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--white);
    background: var(--primary);
    border: none;
    border-radius: 24px;
    cursor: pointer;
    text-decoration: none;
    white-space: nowrap;
    transition: all var(--transition);
    letter-spacing: 0.3px;
}
.btn-nav:hover {
    background: #037a87;
    transform: translateY(-1px);
    box-shadow: 0 4px 14px rgba(4, 137, 152, 0.35);
    color: var(--white);
    text-decoration: none;
}
.btn-nav:active {
    transform: translateY(0);
    box-shadow: 0 2px 6px rgba(4, 137, 152, 0.3);
}

.hamburger {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
    background: none;
    border: none;
    padding: 8px;
    z-index: 1001;
    flex-shrink: 0;
}
.hamburger span {
    display: block;
    width: 24px;
    height: 2.5px;
    background: var(--text-dark);
    border-radius: 2px;
    transition: all var(--transition);
}
.hamburger.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}
.hamburger.active span:nth-child(2) {
    opacity: 0;
}
.hamburger.active span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
}

.mobile-nav-overlay {
    display: none;
    position: fixed;
    top: var(--nav-height);
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    z-index: 999;
    opacity: 0;
    transition: opacity var(--transition);
    pointer-events: none;
}
.mobile-nav-overlay.active {
    opacity: 1;
    pointer-events: auto;
}
.mobile-nav-panel {
    position: fixed;
    top: var(--nav-height);
    left: 0;
    right: 0;
    background: var(--white);
    z-index: 1000;
    padding: 16px 20px;
    transform: translateY(-120%);
    transition: transform var(--transition);
    border-bottom: 2px solid var(--border-color);
    box-shadow: var(--shadow-lg);
    display: flex;
    flex-direction: column;
    gap: 4px;
}
.mobile-nav-panel.active {
    transform: translateY(0);
}
.mobile-nav-panel a {
    display: block;
    padding: 12px 16px;
    font-size: 1rem;
    font-weight: 500;
    color: var(--text-dark);
    text-decoration: none;
    border-radius: var(--radius-sm);
    transition: all var(--transition);
}
.mobile-nav-panel a:hover,
.mobile-nav-panel a:focus-visible {
    background: #e8f7f8;
    color: var(--primary);
}

.main-container {
    max-width: var(--max-width);
    margin: 0 auto;
    display: flex;
    gap: 24px;
    padding: 20px 20px 40px;
}
.content-area {
    flex: 1;
    min-width: 0;
}
.sidebar {
    width: 340px;
    flex-shrink: 0;
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.section-block {
    background: var(--white);
    border-radius: var(--radius-lg);
    padding: 24px;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border-color);
    margin-bottom: 20px;
    transition: box-shadow var(--transition);
}
.section-block:hover {
    box-shadow: var(--shadow-md);
}
.section-title {
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 16px;
    padding-bottom: 12px;
    border-bottom: 2px solid var(--primary-light);
    display: flex;
    align-items: center;
    gap: 8px;
    letter-spacing: 0.4px;
}
.section-title::before {
    content: '';
    display: inline-block;
    width: 5px;
    height: 22px;
    background: var(--primary);
    border-radius: 3px;
    flex-shrink: 0;
}
.sidebar .section-title {
    font-size: 1.1rem;
    margin-bottom: 12px;
    padding-bottom: 10px;
}

.comic-grid {
    display: grid;
    grid-template-columns: repeat(6, 1fr);
    gap: 16px;
}
.comic-card {
    background: var(--white);
    border-radius: var(--radius-md);
    overflow: hidden;
    border: 1px solid var(--border-color);
    transition: all var(--transition);
    cursor: pointer;
    display: flex;
    flex-direction: column;
}
.comic-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-light);
}
.comic-card .card-img-wrap {
    position: relative;
    width: 100%;
    aspect-ratio: 3 / 4;
    overflow: hidden;
    background: #e8e8e8;
}
.comic-card .card-img-wrap img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
    transition: transform 0.4s ease;
}
.comic-card:hover .card-img-wrap img {
    transform: scale(1.06);
}
.comic-card .card-info {
    padding: 10px 12px 12px;
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 4px;
}
.comic-card .card-info h3 {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-dark);
    line-height: 1.3;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    margin: 0;
}
.comic-card .card-meta {
    font-size: 0.72rem;
    color: var(--text-light);
    display: flex;
    flex-wrap: wrap;
    gap: 4px 8px;
    margin-top: 2px;
}
.comic-card .card-meta span {
    background: var(--bg-light);
    padding: 2px 7px;
    border-radius: 10px;
    white-space: nowrap;
}
.comic-card .card-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 4px;
    margin-top: 4px;
}
.comic-card .card-tags .tag {
    font-size: 0.68rem;
    color: var(--primary);
    background: #e8f7f8;
    padding: 2px 8px;
    border-radius: 10px;
    white-space: nowrap;
}

.featured-grid {
    display: grid;
    grid-template-columns: repeat(6, 1fr);
    gap: 16px;
}

.comic-detail-inner {
    display: flex;
    gap: 20px;
    flex-wrap: wrap;
}
.comic-detail-cover {
    flex-shrink: 0;
    width: 180px;
    aspect-ratio: 3 / 4;
    border-radius: var(--radius-md);
    overflow: hidden;
    box-shadow: var(--shadow-md);
    background: #e8e8e8;
}
.comic-detail-cover img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}
.comic-detail-text {
    flex: 1;
    min-width: 240px;
}
.comic-detail-text h3 {
    font-size: 1.2rem;
    font-weight: 700;
    margin-bottom: 8px;
    color: var(--text-dark);
}
.comic-detail-text .detail-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 8px 16px;
    font-size: 0.85rem;
    color: var(--text-gray);
    margin-bottom: 10px;
}
.comic-detail-text .detail-meta strong {
    color: var(--primary);
}
.comic-detail-text p {
    font-size: 0.9rem;
    color: var(--text-gray);
    line-height: 1.7;
}

.comment-list {
    display: flex;
    flex-direction: column;
    gap: 14px;
}
.comment-item {
    background: var(--bg-light);
    border-radius: var(--radius-md);
    padding: 14px 16px;
    border-left: 4px solid var(--primary-light);
    transition: all var(--transition);
}
.comment-item:hover {
    border-left-color: var(--primary);
    box-shadow: var(--shadow-sm);
}
.comment-header {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 6px;
}
.comment-user {
    font-weight: 600;
    font-size: 0.85rem;
    color: var(--text-dark);
}
.comment-time {
    font-size: 0.7rem;
    color: var(--text-light);
    margin-left: auto;
}
.comment-text {
    font-size: 0.85rem;
    color: var(--text-gray);
    line-height: 1.65;
}
.comment-actions {
    display: flex;
    gap: 12px;
    margin-top: 8px;
    font-size: 0.75rem;
    color: var(--text-light);
}
.comment-actions span {
    cursor: pointer;
}
.comment-likes {
    color: var(--primary);
}

.rank-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 10px;
}
.rank-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 8px;
    border-radius: var(--radius-sm);
    transition: all var(--transition);
    cursor: pointer;
    border: 1px solid transparent;
}
.rank-item:hover {
    background: #f9fdfd;
    border-color: var(--border-color);
}
.rank-num {
    width: 26px;
    height: 26px;
    border-radius: 6px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 0.8rem;
    flex-shrink: 0;
    color: #fff;
    background: #999;
}
.rank-num.top1 {
    background: #e74c3c;
}
.rank-num.top2 {
    background: #e67e22;
}
.rank-num.top3 {
    background: #f39c12;
}
.rank-cover {
    width: 44px;
    height: 58px;
    border-radius: 4px;
    object-fit: cover;
    flex-shrink: 0;
    background: #e8e8e8;
}
.rank-info {
    flex: 1;
    min-width: 0;
}
.rank-info h4 {
    font-size: 0.82rem;
    font-weight: 600;
    color: var(--text-dark);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    margin: 0;
}
.rank-info .rank-meta {
    font-size: 0.7rem;
    color: var(--text-light);
    margin-top: 2px;
}
.rank-change {
    font-size: 0.75rem;
    font-weight: 600;
    flex-shrink: 0;
}
.rank-change.up {
    color: #e74c3c;
}
.rank-change.down {
    color: #27ae60;
}

.total-reads-box {
    text-align: center;
    padding: 16px;
    background: linear-gradient(135deg, #e8f7f8 0%, #f6f5f5 100%);
    border-radius: var(--radius-md);
    border: 1px dashed var(--primary-light);
}
.total-reads-num {
    font-size: 2rem;
    font-weight: 800;
    color: var(--primary);
    letter-spacing: 1px;
}
.total-reads-label {
    font-size: 0.8rem;
    color: var(--text-gray);
    margin-top: 2px;
}
.stats-row {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
}
.stat-item {
    flex: 1;
    min-width: 70px;
    text-align: center;
    background: var(--bg-light);
    border-radius: var(--radius-sm);
    padding: 12px 8px;
    border: 1px solid var(--border-color);
}
.stat-value {
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--primary);
}
.stat-label {
    font-size: 0.7rem;
    color: var(--text-light);
    margin-top: 2px;
}

.footer-nav {
    width: 100%;
    background: #1a1a1a;
    color: #ccc;
    padding: 32px 20px 20px;
    border-top: 3px solid var(--primary);
}
.footer-inner {
    max-width: var(--max-width);
    margin: 0 auto;
    display: flex;
    flex-wrap: wrap;
    gap: 24px;
    justify-content: space-between;
}
.footer-col h4 {
    color: #fff;
    font-size: 0.95rem;
    margin-bottom: 10px;
    font-weight: 600;
}
.footer-col a {
    display: block;
    color: #aaa;
    text-decoration: none;
    font-size: 0.8rem;
    padding: 4px 0;
    transition: color var(--transition);
}
.footer-col a:hover {
    color: var(--primary-light);
}
.footer-bottom {
    max-width: var(--max-width);
    margin: 20px auto 0;
    padding-top: 16px;
    border-top: 1px solid #333;
    text-align: center;
    font-size: 0.75rem;
    color: #888;
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    justify-content: center;
    align-items: center;
}
.footer-bottom a {
    color: var(--primary-light);
    text-decoration: none;
    font-weight: 500;
    padding: 4px 10px;
    border-radius: 4px;
    transition: all var(--transition);
}
.footer-bottom a:hover {
    background: #222;
    color: #fff;
}

.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background: var(--primary);
    color: #fff;
    border: none;
    cursor: pointer;
    font-size: 1.2rem;
    font-weight: 700;
    box-shadow: var(--shadow-lg);
    z-index: 900;
    opacity: 0;
    pointer-events: none;
    transition: all var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
}
.back-to-top.visible {
    opacity: 1;
    pointer-events: auto;
}
.back-to-top:hover {
    background: #037a87;
    transform: translateY(-3px);
    box-shadow: 0 8px 24px rgba(4, 137, 152, 0.4);
}

@media (max-width: 1200px) {
    .comic-grid,
    .featured-grid {
        grid-template-columns: repeat(4, 1fr);
    }
    .sidebar {
        width: 300px;
    }
}
@media (max-width: 1024px) {
    .main-container {
        flex-direction: column;
        gap: 16px;
    }
    .sidebar {
        width: 100%;
        display: grid;
        grid-template-columns: repeat(2, 1fr);
        gap: 16px;
    }
    .sidebar .section-block {
        margin-bottom: 0;
    }
    .comic-grid,
    .featured-grid {
        grid-template-columns: repeat(4, 1fr);
    }
    .nav-links {
        gap: 2px;
    }
    .nav-links a {
        padding: 6px 10px;
        font-size: 0.8rem;
    }
}
@media (max-width: 768px) {
    .nav-links {
        display: none;
    }
    .hamburger {
        display: flex;
    }
    .mobile-nav-overlay,
    .mobile-nav-panel {
        display: block;
    }
    .comic-grid,
    .featured-grid {
        grid-template-columns: repeat(3, 1fr);
        gap: 10px;
    }
    .sidebar {
        grid-template-columns: 1fr;
        gap: 14px;
    }
    .comic-detail-inner {
        flex-direction: column;
        align-items: center;
    }
    .comic-detail-cover {
        width: 140px;
    }
    .section-block {
        padding: 16px;
    }
    .section-title {
        font-size: 1.1rem;
    }
    .footer-inner {
        flex-direction: column;
        gap: 16px;
    }
    .back-to-top {
        bottom: 20px;
        right: 16px;
        width: 38px;
        height: 38px;
        font-size: 1rem;
    }
    .stats-row {
        gap: 6px;
    }
    .stat-item {
        padding: 8px 6px;
    }
    .stat-value {
        font-size: 1.1rem;
    }
}
@media (max-width: 480px) {
    .comic-grid,
    .featured-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 8px;
    }
    .top-nav {
        padding: 0 10px;
        height: 56px;
    }
    :root {
        --nav-height: 56px;
    }
    .nav-brand h1 {
        font-size: 1.2rem;
    }
    .btn-nav {
        padding: 8px 14px;
        font-size: 0.78rem;
    }
    .section-block {
        padding: 12px;
        border-radius: var(--radius-sm);
    }
    .section-title {
        font-size: 1rem;
    }
    .comic-card .card-info h3 {
        font-size: 0.78rem;
    }
    .comic-card .card-meta {
        font-size: 0.65rem;
    }
}