:root {
    --white: #ffffff;
    --light-gray: #f8f9fc;
    --medium-gray: #e9ecef;
    --border-color: #dee2e6;
    --text-dark: #212529;
    --text-soft: #495057;
    --text-muted: #6c757d;
    --accent-blue: #0d6efd;
    --accent-navy: #0b5ed7;
    --shadow-sm: 0 10px 30px rgba(0, 0, 0, 0.03), 0 1px 3px rgba(0, 0, 0, 0.02);
    --shadow-hover: 0 20px 40px rgba(0, 0, 0, 0.05), 0 8px 15px rgba(0, 0, 0, 0.02);
    --radius-md: 16px;
    --radius-sm: 12px;
    --font-sans: system-ui, -apple-system, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
}

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

body {
    font-family: var(--font-sans);
    background-color: var(--white);
    color: var(--text-dark);
    line-height: 1.6;
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
}

a {
    text-decoration: none;
    color: inherit;
}

ul,
li {
    list-style: none;
}

img {
    max-width: 100%;
    height: auto;
    display: block;
    object-fit: cover;
}

.line-clamp-1 {
    overflow: hidden;
    display: -webkit-box;
    -webkit-box-orient: vertical;
    -webkit-line-clamp: 1;
}

.line-clamp-2 {
    overflow: hidden;
    display: -webkit-box;
    -webkit-box-orient: vertical;
    -webkit-line-clamp: 2;
}

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

.line-clamp-4 {
    overflow: hidden;
    display: -webkit-box;
    -webkit-box-orient: vertical;
    -webkit-line-clamp: 4;
}

.container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 24px;
}


.site-header {
    position: sticky;
    top: 0;
    z-index: 1000;
    background-color: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(8px);
    border-bottom: 1px solid var(--border-color);
    padding: 16px 0;
    transition: background-color 0.25s ease, box-shadow 0.25s ease, border-color 0.25s;
}

.site-header.scrolled {
    background-color: rgba(255, 255, 255, 0.95);
    box-shadow: 0 6px 18px rgba(0, 0, 0, 0.03);
    border-bottom-color: rgba(222, 226, 230, 0.5);
}

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

.logo a {
    font-size: 26px;
    font-weight: 700;
    letter-spacing: -0.5px;
    color: var(--text-dark);
}

.logo span {
    color: var(--accent-blue);
}


.nav-menu {
    display: flex;
    align-items: center;
    gap: 32px;
}

.nav-links {
    display: flex;
    gap: 28px;
    font-weight: 500;
    color: var(--text-soft);
}

.nav-links a:hover {
    color: var(--accent-blue);
}


.cta-btn {
    background: var(--accent-blue);
    color: white !important;
    padding: 8px 20px;
    border-radius: 40px;
    font-weight: 600;
    font-size: 15px;
    transition: all 0.2s ease;
}

.cta-btn:hover {
    background: var(--accent-navy);
    transform: scale(1.02);
}


.hamburger {
    display: none;
    flex-direction: column;
    cursor: pointer;
    gap: 6px;
}

.hamburger span {
    width: 26px;
    height: 2px;
    background: var(--text-dark);
    border-radius: 4px;
    transition: 0.2s;
}


.site-footer {
    background: var(--light-gray);
    margin-top: 80px;
}

.footer-grid {
    display: grid;
    grid-template-columns: 1.2fr 0.8fr 0.8fr 1.2fr;
    gap: 40px;
}

.footer-brand p {
    color: var(--text-muted);
    margin-top: 16px;
    font-size: 15px;
}

.footer-links li,
.footer-services li {
    margin-bottom: 10px;
}

.footer-links a,
.footer-services a {
    color: var(--text-soft);
    font-size: 15px;
}

.footer-links a:hover,
.footer-services a:hover {
    color: var(--accent-blue);
}


.subscribe-form {
    display: flex;
    flex-direction: column;
    gap: 12px;
    margin-top: 16px;
}

.subscribe-form input {
    padding: 12px 16px;
    border: 1px solid var(--border-color);
    border-radius: 60px;
    font-size: 15px;
    background: white;
}

.subscribe-form .btn {
    background: var(--text-dark);
    color: white;
    padding: 12px 20px;
    border: none;
    border-radius: 60px;
    font-weight: 600;
    cursor: pointer;
    transition: background 0.2s;
}

.subscribe-form .btn:hover {
    background: black;
}

.copyright {
    text-align: center;
    color: var(--text-muted);
    font-size: 14px;
    padding: 20px 0;
}


.card {
    background: white;
    border-radius: var(--radius-sm);
    overflow: hidden;
    transition: all 0.3s cubic-bezier(0.05, 0.7, 0.1, 1);
    box-shadow: var(--shadow-sm);
    height: 100%;
    display: flex;
    flex-direction: column;
}

.card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-hover);
}

.card__img {
    aspect-ratio: 4 / 3;
    width: 100%;
    overflow: hidden;
}

.card__img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}

.card:hover .card__img img {
    transform: scale(1.03);
}

.card__content {
    padding: 20px;
    flex: 1;
    display: flex;
    flex-direction: column;
}

.card__category {
    font-size: 13px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--accent-blue);
    margin-bottom: 8px;
}

.card__title {
    font-size: 20px;
    font-weight: 700;
    line-height: 1.3;
    margin-bottom: 10px;
    color: var(--text-dark);
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.card__excerpt {
    color: var(--text-soft);
    font-size: 15px;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
    margin-bottom: 16px;
}

.card__meta {
    display: flex;
    align-items: center;
    gap: 16px;
    font-size: 13px;
    color: var(--text-muted);
    margin-top: auto;
}

.card__readmore {
    margin-top: 16px;
    font-size: 14px;
    font-weight: 600;
}

.card__readmore a {
    color: var(--accent-blue);
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 6px;
    transition: gap 0.2s;
}

.card__readmore a:hover {
    gap: 10px;
    text-decoration: underline;
}

.card__byline {
    font-size: 13px;
    color: var(--accent-blue);
    font-weight: 600;
    margin-top: 8px;
}


.card--horizontal {
    display: flex;
    flex-direction: row;
    align-items: center;
}

.card--horizontal .card__img {
    width: 120px;
    aspect-ratio: 4/3;
    flex-shrink: 0;
}

.card--horizontal .card__content {
    padding: 16px;
}

.card--horizontal .card__title {
    font-size: 18px;
    -webkit-line-clamp: 2;
}


.card--featured {
    border-bottom: 3px solid var(--accent-blue);
}

.card--featured .card__title {
    font-size: 24px;
}


.top-news {
    margin: 40px 0 32px;
}

.top-news-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.section-header {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    margin-bottom: 28px;
}

.section-header h2 {
    font-size: 28px;
    font-weight: 700;
    letter-spacing: -0.02em;
}

.section-header a {
    color: var(--accent-blue);
    font-weight: 600;
}

.category-world {
    margin-top: 60px;
    margin-bottom: 60px;
}

.card-grid-2 {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 28px;
}



.card-grid-3 .card {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
}

.card-grid-3 .card .card__img {
    height: 100%;
}


.tech-scroll {
    display: flex;
    gap: 24px;
    overflow-x: auto;
    padding-bottom: 8px;
    scrollbar-width: thin;
}

.tech-scroll .card {
    flex: 0 0 300px;
}


.featured-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
    margin: 40px 0;
}


.categories-grid {
    display: grid;
    grid-template-columns: repeat(6, 1fr);
    gap: 20px;
    margin-top: 20px;
}

.category-item {
    background: var(--light-gray);
    border-radius: var(--radius-sm);
    padding: 24px 12px;
    text-align: center;
    transition: all 0.2s ease;
}

.category-item:hover {
    background: white;
    box-shadow: var(--shadow-sm);
    transform: translateY(-4px);
}

.category-icon {
    font-size: 32px;
    margin-bottom: 10px;
}

.category-name {
    font-weight: 700;
    margin-bottom: 6px;
}

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


.page-header {
    padding: 40px 0 20px;
}

.breadcrumb {
    display: flex;
    gap: 10px;
    color: var(--text-muted);
    font-size: 14px;
    margin-bottom: 12px;
}

.breadcrumb a:hover {
    color: var(--accent-blue);
}


.breadcrumb-rich {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 8px;
    background: var(--light-gray);
    padding: 16px 24px;
    border-radius: 60px;
    font-size: 15px;
    margin-bottom: 16px;
}

.breadcrumb-rich a {
    color: var(--accent-blue);
    font-weight: 500;
    text-decoration: none;
}

.breadcrumb-rich a:hover {
    text-decoration: underline;
}

.breadcrumb-rich span {
    color: var(--text-muted);
}

.breadcrumb-rich .separator {
    color: #adb5bd;
    font-weight: 300;
}


.category-layout {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 48px;
    margin-top: 40px;
}


.filter-bar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 32px;
    background: var(--light-gray);
    padding: 16px 24px;
    border-radius: 60px;
}

.filter-select {
    padding: 8px 20px;
    border: 1px solid var(--border-color);
    border-radius: 40px;
    background: white;
    font-size: 14px;
    cursor: default;
    color: var(--text-soft);
}


.pagination {
    display: flex;
    justify-content: center;
    gap: 8px;
    margin-top: 48px;
}

.pagination a,
.pagination span {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 40px;
    width: auto;
    height: 40px;
    border-radius: 50%;
    background: white;
    border: 1px solid var(--border-color);
    color: var(--text-soft);
}

.pagination .current {
    background: var(--accent-blue);
    color: white;
    border-color: var(--accent-blue);
}

.author-byline {
    display: flex;
    align-items: center;
    gap: 0.7rem;
}

.author-mini-avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    object-fit: cover;
}

.author-byline .author-name {
    font-weight: 600;
    color: #0b1c2f;
    font-size: 1rem;
    margin: 0;
}

.author-widget .author-header {
    display: flex;
    gap: 1rem;
    align-items: center;
    margin-bottom: 1.2rem;
    margin-top: 0;
    padding: 0;
    border: none;
    background: none;
    box-shadow: none;
}

.author-widget .author-header::before {
    content: none;
}

.author-widget .author-avatar {
    width: 70px;
    height: 70px;
    border-radius: 50%;
    object-fit: cover;
    border: 3px solid white;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.06);
}

.author-widget .author-name-title h3 {
    font-size: 1.2rem;
    margin: 0 0 0.2rem;
    border: none;
    padding: 0;
    color: #333;
}

.author-name-title p {
    font-size: 0.9rem;
    color: #6b7f94;
}

.author-widget .author-bio {
    font-size: 0.95rem;
    color: #34495e;
    line-height: 1.5;
    margin: 0;
}

.sidebar {
    position: sticky;
    top: 100px;
    align-self: start;
}

.sidebar-widget {
    background: var(--light-gray);
    border-radius: var(--radius-sm);
    padding: 28px 24px;
    margin-bottom: 32px;
}

.sidebar-widget h3 {
    font-size: 20px;
    margin-bottom: 20px;
    font-weight: 700;
}

.tag-cloud {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.tag {
    background: white;
    padding: 6px 14px;
    border-radius: 40px;
    font-size: 14px;
    border: 1px solid var(--border-color);
    transition: 0.1s;
}

.tag:hover {
    background: var(--accent-blue);
    color: white;
    border-color: var(--accent-blue);
}


.sidebar-recommend-item {
    display: flex;
    gap: 16px;
    padding: 12px 0;
    border-bottom: 1px solid var(--border-color);
}

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

.sidebar-recommend-item img {
    width: 80px;
    aspect-ratio: 4/3;
    border-radius: 12px;
    object-fit: cover;
}

.sidebar-recommend-item h4 {
    font-size: 16px;
    font-weight: 700;
    margin-bottom: 4px;
    line-height: 1.3;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.sidebar-recommend-item .meta {
    font-size: 13px;
    color: var(--text-muted);
}


.detail-layout {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 48px;
    margin-top: 32px;
}

.article-header {
    margin-bottom: 32px;
}

.article-title {
    font-size: 44px;
    line-height: 1.2;
    font-weight: 800;
    letter-spacing: -0.02em;
    margin: 16px 0 20px;
}

.article-meta {
    display: flex;
    align-items: center;
    gap: 24px;
    color: var(--text-muted);
    font-size: 15px;
    margin-bottom: 15px;
}

.article-featured-img {
    aspect-ratio: 4/3;
    border-radius: var(--radius-sm);
    overflow: hidden;
    margin: 32px 0;
}

.article-body {
     font-size: 0.985rem;
    letter-spacing: 0.2px;
    color: #171717;
    line-height: 1.75;
}

.article-body img {
    margin: 0 auto;
}


.post-categories {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin: 40px 0 16px;
    padding-top: 24px;
    border-top: 1px solid var(--border-color);
}

.post-category {
    background: var(--medium-gray);
    padding: 6px 16px;
    border-radius: 40px;
    font-size: 14px;
    font-weight: 600;
    color: var(--text-dark);
    transition: all 0.2s;
}

.post-category:hover {
    background: var(--accent-blue);
    color: white;
}


.author-card {
    display: flex;
    align-items: center;
    gap: 20px;
    background: var(--light-gray);
    padding: 24px 28px;
    border-radius: 24px;
    margin: 48px 0 32px;
    border: 1px solid var(--border-color);
}

.author-avatar {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    object-fit: cover;
    border: 3px solid white;
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.05);
}

.author-info h4 {
    font-size: 20px;
    font-weight: 700;
    margin-bottom: 4px;
}

.author-bio {
    color: var(--text-soft);
    font-size: 15px;
    line-height: 1.5;
    margin-bottom: 8px;
}

.author-meta {
    color: var(--text-muted);
    font-size: 14px;
}


.share-buttons {
    display: flex;
    gap: 16px;
    margin: 48px 0 24px;
    padding-top: 24px;
    border-top: 1px solid var(--border-color);
}

.share-btn {
    background: var(--light-gray);
    border: none;
    padding: 12px 24px;
    border-radius: 40px;
    font-weight: 600;
    cursor: pointer;
    transition: background 0.2s, color 0.2s;
    gap: 3px;
}


.share-btn:hover {
    background: var(--accent-blue);
    color: white;
}


.comments-section {
    margin-top: 60px;
}

.comment-list {
    margin: 32px 0;
}

.comment {
    display: flex;
    gap: 16px;
    padding: 20px 0;
    border-bottom: 1px solid var(--border-color);
}

.comment-avatar {
    width: 48px;
    height: 48px;
    background: var(--medium-gray);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: 600;
    text-transform: uppercase;
}

.comment-author {
    font-weight: 700;
}

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


.related-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
    margin-top: 24px;
}

.related-card {
    display: flex;
    flex-direction: column;
    background: white;
    border-radius: 16px;
    overflow: hidden;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.02);
    transition: transform 0.3s ease, box-shadow 0.3s;
    border: 1px solid #f1f3f5;
}

.related-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.05);
}

.related-card img {
    aspect-ratio: 4/3;
    width: 100%;
    object-fit: cover;
}

.related-card .content {
    padding: 16px;
}

.related-card h4 {
    font-size: 16px;
    font-weight: 700;
    margin-bottom: 6px;
    line-height: 1.4;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.related-card .meta {
    font-size: 13px;
    color: var(--text-muted);
}


.author-profile {
    display: flex;
    gap: 48px;
    background: white;
    border-radius: 32px;
    padding: 48px;
    margin: 48px 0 40px;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.02);
    border: 1px solid #f1f3f5;
}

.author-profile__avatar {
    flex-shrink: 0;
    width: 180px;
    height: 180px;
    border-radius: 50%;
    overflow: hidden;
    box-shadow: 0 15px 30px rgba(13, 110, 253, 0.1);
    border: 4px solid white;
    transition: transform 0.3s ease;
}

.author-profile__avatar:hover {
    transform: scale(1.02);
}

.author-profile__avatar img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.author-profile__info {
    flex: 1;
}

.author-profile__name {
    font-size: 48px;
    font-weight: 800;
    letter-spacing: -0.02em;
    margin-bottom: 8px;
    color: var(--text-dark);
}

.author-profile__title {
    font-size: 22px;
    font-weight: 500;
    color: var(--accent-blue);
    margin-bottom: 20px;
}

.author-profile__bio {
    font-size: 18px;
    color: var(--text-soft);
    line-height: 1.6;
    margin-bottom: 24px;
    max-width: 800px;
}

.author-social {
    display: flex;
    gap: 20px;
    margin-top: 16px;
}

.author-social a {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 20px;
    background: var(--light-gray);
    border-radius: 40px;
    color: var(--text-dark);
    font-size: 15px;
    font-weight: 600;
    transition: all 0.2s;
    border: 1px solid var(--border-color);
    text-decoration: none;
}

.author-social a:hover {
    background: var(--accent-blue);
    color: white;
    border-color: var(--accent-blue);
    transform: translateY(-2px);
}


.author-detail {
    background: white;
    border-radius: 24px;
    padding: 48px;
    margin-bottom: 60px;
    border-top: 1px solid var(--border-color);
    border-bottom: 1px solid var(--border-color);
}

.author-detail h2 {
    font-size: 32px;
    font-weight: 700;
    margin-bottom: 24px;
    letter-spacing: -0.01em;
}

.author-detail p {
    font-size: 18px;
    line-height: 1.7;
    color: #2b2f33;
    margin-bottom: 24px;
}

.author-detail .highlight {
    background: var(--light-gray);
    padding: 24px 32px;
    border-left: 6px solid var(--accent-blue);
    border-radius: 16px;
    font-style: italic;
    margin: 32px 0;
}


.author-articles {
    margin-top: 40px;
}

.section-title {
    font-size: 32px;
    font-weight: 700;
    margin-bottom: 32px;
    display: flex;
    align-items: center;
    gap: 12px;
}

.section-title span {
    background: var(--accent-blue);
    color: white;
    padding: 4px 12px;
    border-radius: 60px;
    font-size: 16px;
}

.author-articles-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 28px;
}


.back-to-top {
    position: fixed;
    bottom: 40px;
    right: 30px;
    width: 48px;
    height: 48px;
    background: var(--text-dark);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transition: 0.2s;
    border: none;
    z-index: 99;
}

.back-to-top.show {
    opacity: 1;
    visibility: visible;
}

.back-to-top:hover {
    background: black;
}


@media (max-width: 1024px) {
    .footer-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .categories-grid {
        grid-template-columns: repeat(3, 1fr);
    }

    .category-layout,
    .detail-layout {
        grid-template-columns: 1fr;
    }

    .sidebar {
        position: static;
    }

    .author-articles-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 992px) {
    .author-profile {
        flex-direction: column;
        align-items: center;
        text-align: center;
        padding: 32px;
    }

    .author-profile__bio {
        margin-left: auto;
        margin-right: auto;
    }

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

@media (max-width: 768px) {
    .article-meta {
        gap: 0.5rem;
    }

    .author-mini-avatar {
        display: none;
    }

    .author-byline .author-name,
    .article-meta {
        font-size: 0.8rem;
    }

    .category-layout,
    .detail-layout {
        grid-template-columns: 100%;
    }

    .share-buttons {
        flex-wrap: wrap;
    }

    .site-header {
        position: relative;
        padding: 10px 0;
    }

    .category-world {
        margin-top: 20px;
    }

    .card-grid-3 .card {
        grid-template-columns: 100%;
    }

    .pagination {
        flex-wrap: wrap;
    }

    .hamburger {
        display: flex;
    }

    .nav-menu {
        position: fixed;
        top: 72px;
        left: 0;
        width: 100%;
        background: white;
        flex-direction: column;
        padding: 32px 24px;
        box-shadow: 0 20px 40px rgba(0, 0, 0, 0.05);
        transform: translateX(100%);
        transition: transform 0.3s ease;
        border-bottom: 1px solid var(--border-color);
        align-items: flex-start;
        gap: 24px;
        display: none;
    }

    .nav-menu.active {
        display: block;
        transform: translateX(0);
    }

    .nav-links {
        flex-direction: column;
        width: 100%;
        gap: 20px;
    }

    .cta-btn {
        align-self: flex-start;
    }

    .top-news-grid {
        grid-template-columns: 1fr;
    }

    .card-grid-2,
    .featured-grid {
        grid-template-columns: 1fr;
    }

    .categories-grid {
        grid-template-columns: repeat(2, 1fr);
    }

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

    .article-title {
        font-size: 22px;
    }

    .author-profile__name {
        font-size: 36px;
    }

    .author-profile {
        padding: 24px;
    }

    .author-detail {
        padding: 32px 24px;
    }

    .author-articles-grid {
        grid-template-columns: 1fr;
    }

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

    .author-card {
        flex-direction: column;
        text-align: center;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 16px;
    }

    .breadcrumb-rich {
        padding: 12px 16px;
        font-size: 13px;
    }
}