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

:root {
    --primary-color: #2563eb;
    --secondary-color: #1e40af;
    --accent-color: #3b82f6;
    --dark-bg: #0f172a;
    --card-bg: #1e293b;
    --text-primary: #f8fafc;
    --text-secondary: #cbd5e1;
    --border-color: #334155;
    --success-color: #10b981;
    --warning-color: #f59e0b;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', sans-serif;
    background: linear-gradient(135deg, #0f172a 0%, #1e293b 100%);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
}

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

/* Header */
.header {
    background: rgba(15, 23, 42, 0.95);
    backdrop-filter: blur(10px);
    padding: 1rem 0;
    position: sticky;
    top: 0;
    z-index: 1000;
    border-bottom: 1px solid var(--border-color);
}

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

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 1.5rem;
    color: var(--primary-color);
}

.logo i {
    font-size: 2rem;
}

.logo h1 {
    font-size: 1.5rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.nav {
    display: flex;
    gap: 2rem;
}

.nav a {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s ease;
    position: relative;
}

.nav a::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary-color);
    transition: width 0.3s ease;
}

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

.nav a:hover::after,
.nav a.active::after {
    width: 100%;
}

/* Hero Section */
.hero {
    padding: 6rem 0;
    text-align: center;
    background: linear-gradient(135deg, rgba(37, 99, 235, 0.1) 0%, rgba(59, 130, 246, 0.05) 100%);
    border-bottom: 1px solid var(--border-color);
}

.hero h2 {
    font-size: 3rem;
    margin-bottom: 1rem;
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color), var(--success-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    animation: gradient 3s ease infinite;
}

.hero p {
    font-size: 1.2rem;
    color: var(--text-secondary);
}

/* Categories */
.categories {
    padding: 4rem 0;
}

.section-title {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 3rem;
    color: var(--text-primary);
}

.category-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.category-card {
    background: var(--card-bg);
    padding: 2rem;
    border-radius: 12px;
    border: 1px solid var(--border-color);
    text-align: center;
    transition: all 0.3s ease;
    cursor: pointer;
}

.category-card:hover {
    transform: translateY(-5px);
    border-color: var(--primary-color);
    box-shadow: 0 10px 30px rgba(37, 99, 235, 0.2);
}

.category-card i {
    font-size: 3rem;
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.category-card h3 {
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
}

.category-card p {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

/* Articles */
.articles {
    padding: 4rem 0;
    background: rgba(30, 41, 59, 0.3);
}

.article-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: 2rem;
}

.article-card {
    background: var(--card-bg);
    border-radius: 12px;
    overflow: hidden;
    border: 1px solid var(--border-color);
    transition: all 0.3s ease;
    cursor: pointer;
}

.article-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(37, 99, 235, 0.2);
    border-color: var(--primary-color);
}

.article-image {
    width: 100%;
    height: 200px;
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 4rem;
    color: rgba(255, 255, 255, 0.9);
}

.article-content {
    padding: 1.5rem;
}

.article-meta {
    display: flex;
    gap: 1rem;
    margin-bottom: 1rem;
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.article-meta span {
    display: flex;
    align-items: center;
    gap: 0.3rem;
}

.article-category {
    display: inline-block;
    padding: 0.3rem 0.8rem;
    background: rgba(37, 99, 235, 0.2);
    color: var(--primary-color);
    border-radius: 20px;
    font-size: 0.8rem;
    margin-bottom: 1rem;
}

.article-card h3 {
    font-size: 1.3rem;
    margin-bottom: 0.8rem;
    color: var(--text-primary);
}

.article-card p {
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: 1rem;
}

.read-more {
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 500;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    transition: gap 0.3s ease;
}

.read-more:hover {
    gap: 1rem;
}

/* About */
.about {
    padding: 4rem 0;
}

.about-content {
    max-width: 800px;
    margin: 0 auto;
    background: var(--card-bg);
    padding: 2rem;
    border-radius: 12px;
    border: 1px solid var(--border-color);
}

.about-content p {
    font-size: 1.1rem;
    margin-bottom: 1.5rem;
    color: var(--text-secondary);
}

.about-content ul {
    list-style: none;
}

.about-content ul li {
    padding: 0.8rem 0;
    display: flex;
    align-items: center;
    gap: 1rem;
    font-size: 1.05rem;
    color: var(--text-secondary);
}

.about-content ul li i {
    color: var(--success-color);
    font-size: 1.2rem;
}

/* Footer */
.footer {
    background: rgba(15, 23, 42, 0.95);
    padding: 2rem 0;
    margin-top: 4rem;
    border-top: 1px solid var(--border-color);
}

.footer .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.footer-content {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

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

.icp-info {
    font-size: 0.85rem;
}

.icp-info a {
    color: var(--text-secondary);
    text-decoration: none;
    transition: color 0.3s ease;
}

.icp-info a:hover {
    color: var(--primary-color);
}

.social-links {
    display: flex;
    gap: 1.5rem;
}

.social-links a {
    color: var(--text-secondary);
    font-size: 1.5rem;
    transition: color 0.3s ease;
}

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

/* Responsive */
@media (max-width: 768px) {
    .header .container {
        flex-direction: column;
        gap: 1rem;
    }

    .nav {
        gap: 1rem;
    }

    .hero h2 {
        font-size: 2rem;
    }

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

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

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

    .footer .container {
        flex-direction: column;
        gap: 1rem;
        text-align: center;
    }

    .footer-content {
        align-items: center;
    }

    .section-title {
        font-size: 2rem;
    }
}

/* Animations */
@keyframes gradient {
    0%, 100% {
        background-position: 0% 50%;
    }
    50% {
        background-position: 100% 50%;
    }
}

/* Article Detail Page */
.article-detail {
    padding: 2rem 0 4rem;
}

.breadcrumb {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 2rem;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.breadcrumb a {
    color: var(--text-secondary);
    text-decoration: none;
    transition: color 0.3s ease;
}

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

.article-header {
    margin-bottom: 3rem;
}

.article-header h1 {
    font-size: 2.5rem;
    margin-bottom: 1.5rem;
    line-height: 1.3;
}

.article-meta-detail {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.article-category-detail {
    display: inline-block;
    padding: 0.4rem 1rem;
    background: rgba(37, 99, 235, 0.2);
    color: var(--primary-color);
    border-radius: 20px;
    font-size: 0.9rem;
    width: fit-content;
}

.meta-info {
    display: flex;
    gap: 2rem;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.meta-info span {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.article-body {
    display: grid;
    grid-template-columns: 250px 1fr;
    gap: 3rem;
    align-items: start;
}

.table-of-contents {
    position: sticky;
    top: 100px;
    background: var(--card-bg);
    padding: 1.5rem;
    border-radius: 12px;
    border: 1px solid var(--border-color);
}

.table-of-contents h3 {
    font-size: 1.1rem;
    margin-bottom: 1rem;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.table-of-contents ul {
    list-style: none;
}

.table-of-contents li {
    margin-bottom: 0.8rem;
}

.table-of-contents li.h3 {
    margin-left: 1rem;
    font-size: 0.9rem;
}

.table-of-contents a {
    color: var(--text-secondary);
    text-decoration: none;
    transition: color 0.3s ease;
    display: block;
    padding: 0.3rem 0;
}

.table-of-contents a:hover,
.table-of-contents a.active {
    color: var(--primary-color);
}

.article-content-detail {
    background: var(--card-bg);
    padding: 3rem;
    border-radius: 12px;
    border: 1px solid var(--border-color);
    line-height: 1.8;
}

.article-content-detail h2 {
    font-size: 1.8rem;
    margin: 2rem 0 1rem;
    padding-bottom: 0.5rem;
    border-bottom: 2px solid var(--border-color);
    color: var(--text-primary);
}

.article-content-detail h3 {
    font-size: 1.4rem;
    margin: 1.5rem 0 1rem;
    color: var(--text-primary);
}

.article-content-detail p {
    margin-bottom: 1.5rem;
    color: var(--text-secondary);
}

.article-content-detail ul,
.article-content-detail ol {
    margin-bottom: 1.5rem;
    padding-left: 2rem;
}

.article-content-detail li {
    margin-bottom: 0.8rem;
    color: var(--text-secondary);
}

.article-content-detail strong {
    color: var(--primary-color);
    font-weight: 600;
}

.article-content-detail pre {
    background: #1e1e1e;
    border-radius: 8px;
    padding: 1.5rem;
    margin: 1.5rem 0;
    overflow-x: auto;
    border: 1px solid var(--border-color);
}

.article-content-detail code {
    font-family: 'Consolas', 'Monaco', 'Courier New', monospace;
    font-size: 0.9rem;
}

.article-content-detail table {
    width: 100%;
    border-collapse: collapse;
    margin: 1.5rem 0;
}

.article-content-detail table th,
.article-content-detail table td {
    padding: 0.8rem;
    border: 1px solid var(--border-color);
    text-align: left;
}

.article-content-detail table th {
    background: rgba(37, 99, 235, 0.1);
    color: var(--primary-color);
    font-weight: 600;
}

.article-tags {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-top: 3rem;
    padding-top: 2rem;
    border-top: 1px solid var(--border-color);
}

.article-tags i {
    color: var(--primary-color);
    font-size: 1.2rem;
}

.tag {
    padding: 0.4rem 1rem;
    background: rgba(59, 130, 246, 0.1);
    color: var(--accent-color);
    border-radius: 20px;
    font-size: 0.85rem;
    border: 1px solid rgba(59, 130, 246, 0.3);
    transition: all 0.3s ease;
}

.tag:hover {
    background: rgba(59, 130, 246, 0.2);
    border-color: var(--accent-color);
}

.article-navigation {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
    margin-top: 3rem;
}

.article-navigation a {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1.5rem;
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    text-decoration: none;
    transition: all 0.3s ease;
}

.article-navigation a:hover {
    border-color: var(--primary-color);
    transform: translateY(-3px);
}

.nav-prev {
    justify-content: flex-start;
}

.nav-next {
    justify-content: flex-end;
}

.article-navigation a i {
    font-size: 1.5rem;
    color: var(--primary-color);
}

.article-navigation a div span {
    display: block;
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-bottom: 0.3rem;
}

.article-navigation a div p {
    font-size: 1rem;
    color: var(--text-primary);
    font-weight: 500;
}

/* Archive Page */
.archive-page {
    padding: 4rem 0;
    min-height: 70vh;
}

.archive-header {
    text-align: center;
    margin-bottom: 3rem;
}

.archive-header h1 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1rem;
}

.archive-header p {
    color: var(--text-secondary);
    font-size: 1.1rem;
}

.archive-filters {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 1rem;
    margin-bottom: 3rem;
}

.filter-btn {
    padding: 0.6rem 1.5rem;
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 25px;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.9rem;
}

.filter-btn:hover {
    border-color: var(--primary-color);
    color: var(--primary-color);
}

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

.archive-timeline {
    max-width: 900px;
    margin: 0 auto;
}

.archive-year {
    margin-bottom: 3rem;
}

.year-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 2rem;
    padding-bottom: 1rem;
    border-bottom: 2px solid var(--primary-color);
}

.year-header h2 {
    font-size: 2rem;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 0.8rem;
}

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

.archive-month {
    margin-bottom: 2rem;
}

.month-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 1rem;
    padding: 0.8rem 1.2rem;
    background: rgba(37, 99, 235, 0.1);
    border-left: 4px solid var(--primary-color);
    border-radius: 4px;
}

.month-header h3 {
    font-size: 1.3rem;
    color: var(--primary-color);
}

.month-header span {
    color: var(--text-secondary);
    font-size: 0.85rem;
}

.archive-list {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.archive-item {
    display: flex;
    gap: 1.5rem;
    padding: 1.5rem;
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    transition: all 0.3s ease;
}

.archive-item:hover {
    border-color: var(--primary-color);
    transform: translateX(5px);
}

.archive-item-icon {
    flex-shrink: 0;
    width: 60px;
    height: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(37, 99, 235, 0.1);
    border-radius: 12px;
    color: var(--primary-color);
    font-size: 1.8rem;
}

.archive-item-content {
    flex: 1;
}

.archive-item-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 0.8rem;
}

.archive-item-title {
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--text-primary);
    text-decoration: none;
    transition: color 0.3s ease;
}

.archive-item-title:hover {
    color: var(--primary-color);
}

.archive-item-category {
    padding: 0.3rem 0.8rem;
    background: rgba(37, 99, 235, 0.2);
    color: var(--primary-color);
    border-radius: 15px;
    font-size: 0.8rem;
}

.archive-item-excerpt {
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: 0.8rem;
}

.archive-item-meta {
    display: flex;
    gap: 1.5rem;
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.archive-item-meta span {
    display: flex;
    align-items: center;
    gap: 0.4rem;
}

/* Responsive for Article Detail and Archive */
@media (max-width: 968px) {
    .article-body {
        grid-template-columns: 1fr;
    }
    
    .table-of-contents {
        position: relative;
        top: 0;
    }
    
    .article-navigation {
        grid-template-columns: 1fr;
    }
    
    .archive-item {
        flex-direction: column;
    }
}

@media (max-width: 768px) {
    .article-header h1 {
        font-size: 1.8rem;
    }
    
    .article-content-detail {
        padding: 1.5rem;
    }
    
    .meta-info {
        flex-wrap: wrap;
        gap: 1rem;
    }
}

/* Smooth Scroll */
html {
    scroll-behavior: smooth;
}