@import url('https://fonts.googleapis.com/css2?family=Space+Grotesk:wght@400;500;600;700&family=JetBrains+Mono:wght@400;500&display=swap');

/* ============================================
   CSS Variables
   ============================================ */
:root {
    --color-bg: #0a0a0f;
    --color-surface: #12121a;
    --color-text: #e0e0e0;
    --color-text-secondary: #888;
    --color-accent: #f4a462;
    --color-accent-dim: rgba(244, 164, 98, 0.15);
    --color-code-bg: #161620;
    --color-border: #222;

    --font-sans: 'Space Grotesk', -apple-system, 'Microsoft YaHei', sans-serif;
    --font-mono: 'JetBrains Mono', 'Consolas', monospace;

    --content-width: 680px;
    --page-width: 1200px;
}

/* ============================================
   Reset & Base
   ============================================ */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-sans);
    background: var(--color-bg);
    color: var(--color-text);
    line-height: 1.8;
    font-size: 17px;
    -webkit-font-smoothing: antialiased;
}

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

img {
    max-width: 100%;
    height: auto;
}

/* ============================================
   Header
   ============================================ */
.site-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    padding: 1.5rem 3rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    z-index: 100;
    background: rgba(10, 10, 15, 0.9);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--color-border);
}

.logo {
    font-size: 1.1rem;
    font-weight: 600;
}

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

.nav-menu {
    display: flex;
    gap: 2rem;
    list-style: none;
}

.nav-menu a {
    color: var(--color-text-secondary);
    font-size: 0.9rem;
    transition: color 0.2s;
}

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

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

@media (max-width: 768px) {
    .site-header {
        padding: 1rem 1.5rem;
    }

    .menu-toggle {
        display: block;
    }

    .nav-menu {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: var(--color-surface);
        flex-direction: column;
        padding: 1rem;
        gap: 0;
        border-bottom: 1px solid var(--color-border);
    }

    .nav-menu.active {
        display: flex;
    }

    .nav-menu a {
        padding: 0.8rem 1rem;
        display: block;
    }
}

/* ============================================
   Footer
   ============================================ */
.site-footer {
    max-width: var(--content-width);
    margin: 0 auto;
    padding: 3rem 2rem;
    border-top: 1px solid var(--color-border);
    text-align: center;
    color: var(--color-text-secondary);
    font-size: 0.9rem;
}

.site-footer a {
    color: inherit;
    transition: color 0.2s;
}

.site-footer a:hover {
    color: var(--color-accent);
}

/* ============================================
   Article List Page
   ============================================ */
.page-list {
    max-width: var(--page-width);
    margin: 0 auto;
    padding: 8rem 2rem 4rem;
}

.page-title {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
}

.page-description {
    color: var(--color-text-secondary);
    margin-bottom: 3rem;
}

/* Article cards grid */
.article-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
    gap: 2rem;
}

.article-card {
    background: var(--color-surface);
    border-radius: 12px;
    overflow: hidden;
    border: 1px solid var(--color-border);
    transition: transform 0.2s, box-shadow 0.2s;
}

.article-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.3);
}

.article-card-cover {
    aspect-ratio: 16/9;
    overflow: hidden;
}

.article-card-cover img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.3s;
}

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

.article-card-body {
    padding: 1.5rem;
}

.article-card-category {
    display: inline-block;
    background: var(--color-accent-dim);
    color: var(--color-accent);
    padding: 0.2rem 0.6rem;
    border-radius: 4px;
    font-size: 0.75rem;
    margin-bottom: 0.8rem;
}

.article-card-title {
    font-size: 1.2rem;
    font-weight: 600;
    line-height: 1.4;
    margin-bottom: 0.8rem;
    color: #fff;
}

.article-card-excerpt {
    color: var(--color-text-secondary);
    font-size: 0.9rem;
    line-height: 1.6;
    margin-bottom: 1rem;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.article-card-meta {
    display: flex;
    justify-content: space-between;
    color: var(--color-text-secondary);
    font-size: 0.8rem;
}

/* ============================================
   Article Page
   ============================================ */
.article-container {
    max-width: var(--content-width);
    margin: 0 auto;
    padding: 8rem 2rem 4rem;
}

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

.article-header .category {
    display: inline-block;
    background: var(--color-accent-dim);
    color: var(--color-accent);
    padding: 0.2rem 0.6rem;
    border-radius: 4px;
    font-size: 0.8rem;
    margin-bottom: 1rem;
}

.article-header h1 {
    font-size: 2.2rem;
    font-weight: 700;
    line-height: 1.3;
    margin-bottom: 1rem;
    color: #fff;
}

.article-meta {
    color: var(--color-text-secondary);
    font-size: 0.9rem;
    display: flex;
    flex-wrap: wrap;
    gap: 1.5rem;
}

.article-tags {
    display: flex;
    gap: 0.5rem;
    margin-top: 1rem;
}

.article-tags .tag {
    background: var(--color-code-bg);
    padding: 0.2rem 0.6rem;
    border-radius: 4px;
    font-size: 0.8rem;
    color: var(--color-text-secondary);
}

/* Cover image */
.article-cover {
    margin: 2rem -2rem;
    border-radius: 12px;
    overflow: hidden;
}

.article-cover img {
    width: 100%;
}

@media (max-width: 768px) {
    .article-cover {
        margin: 2rem -1.5rem;
        border-radius: 0;
    }
}

/* ============================================
   Article Content
   ============================================ */
.article-content h2 {
    font-size: 1.5rem;
    font-weight: 600;
    margin: 3rem 0 1.5rem;
    color: #fff;
}

.article-content h3 {
    font-size: 1.2rem;
    font-weight: 600;
    margin: 2rem 0 1rem;
    color: #fff;
}

.article-content p {
    margin-bottom: 1.5rem;
}

.article-content a {
    color: var(--color-accent);
    border-bottom: 1px solid transparent;
    transition: border-color 0.2s;
}

.article-content a:hover {
    border-bottom-color: var(--color-accent);
}

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

.article-content li {
    margin-bottom: 0.5rem;
}

.article-content blockquote {
    border-left: 3px solid var(--color-accent);
    padding-left: 1.5rem;
    margin: 2rem 0;
    color: var(--color-text-secondary);
    font-style: italic;
}

.article-content img {
    border-radius: 8px;
    margin: 2rem 0;
}

.article-content figure {
    margin: 2rem 0;
}

.article-content figcaption {
    text-align: center;
    color: var(--color-text-secondary);
    font-size: 0.9rem;
    margin-top: 0.5rem;
}

/* Code */
.article-content code {
    font-family: var(--font-mono);
    background: var(--color-code-bg);
    padding: 0.2rem 0.5rem;
    border-radius: 4px;
    font-size: 0.9em;
}

.article-content pre {
    background: var(--color-code-bg);
    border-radius: 8px;
    padding: 1.5rem;
    overflow-x: auto;
    margin: 2rem 0;
    border: 1px solid var(--color-border);
}

.article-content pre code {
    background: none;
    padding: 0;
    font-size: 0.85rem;
    line-height: 1.6;
}

/* Code syntax highlighting */
.highlight .keyword { color: #c792ea; }
.highlight .string { color: #c3e88d; }
.highlight .number { color: #f78c6c; }
.highlight .comment { color: #546e7a; }
.highlight .function { color: #82aaff; }
.highlight .property { color: #f4a462; }

/* ============================================
   Article CTA
   ============================================ */
.article-cta {
    margin-top: 4rem;
    padding: 2rem;
    background: var(--color-code-bg);
    border-radius: 12px;
    text-align: center;
    border: 1px solid var(--color-border);
}

.article-cta p {
    margin-bottom: 1rem;
    color: var(--color-text-secondary);
}

.article-cta .btn {
    display: inline-block;
    background: var(--color-accent);
    color: #000;
    padding: 0.8rem 2rem;
    border-radius: 6px;
    font-weight: 600;
    transition: transform 0.2s, box-shadow 0.2s;
}

.article-cta .btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 20px rgba(244, 164, 98, 0.3);
}

.article-cta .cta-link {
    color: var(--color-accent);
    text-decoration: underline;
    text-underline-offset: 3px;
}

.article-cta .cta-link:hover {
    text-decoration-thickness: 2px;
}

/* ============================================
   Utilities
   ============================================ */
.container {
    max-width: var(--page-width);
    margin: 0 auto;
    padding: 0 2rem;
}

@media (max-width: 768px) {
    .article-container {
        padding: 6rem 1.5rem 3rem;
    }

    .article-header h1 {
        font-size: 1.8rem;
    }

    .page-list {
        padding: 6rem 1.5rem 3rem;
    }

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

/* ============================================
   Extended Blocks (:::intro, :::highlight, etc.)
   ============================================ */
.article-content .block-intro,
.article-content .block-summary {
    margin: 2rem 0;
    padding: 1.5rem;
    background: linear-gradient(135deg, rgba(244, 164, 98, 0.1), rgba(244, 164, 98, 0.02));
    border-left: 4px solid var(--color-accent);
    border-radius: 0 8px 8px 0;
}

.article-content .block-intro p,
.article-content .block-summary p {
    margin: 0 0 0.8rem 0;
}

.article-content .block-intro p:last-child,
.article-content .block-summary p:last-child {
    margin-bottom: 0;
}

.article-content .block-highlight {
    margin: 2rem 0;
    padding: 1.5rem;
    background: rgba(244, 164, 98, 0.08);
    border: 1px solid rgba(244, 164, 98, 0.3);
    border-radius: 8px;
}

.article-content .block-warning {
    margin: 2rem 0;
    padding: 1.5rem;
    background: rgba(231, 76, 60, 0.1);
    border: 1px solid rgba(231, 76, 60, 0.3);
    border-radius: 8px;
}

.article-content .block-warning::before {
    content: "⚠️ 注意";
    display: block;
    color: #e74c3c;
    font-weight: 600;
    margin-bottom: 0.8rem;
}

.article-content .block-faq {
    margin: 1rem 0;
    padding: 1.5rem;
    background: var(--color-code-bg);
    border-radius: 8px;
}

.article-content .block-cta {
    margin: 3rem 0;
    padding: 2rem;
    background: linear-gradient(135deg, rgba(244, 164, 98, 0.15), rgba(244, 164, 98, 0.05));
    border: 1px solid rgba(244, 164, 98, 0.3);
    border-radius: 12px;
    text-align: center;
}

.article-content .block-cta p {
    margin: 0 0 0.5rem 0;
}

.article-content .block-cta p:last-child {
    margin-bottom: 0;
    color: var(--color-text-secondary);
}

/* ============================================
   Modal
   ============================================ */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.8);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s;
}

.modal-overlay.active {
    opacity: 1;
    visibility: visible;
}

.modal-content {
    background: var(--color-surface);
    padding: 2rem;
    border-radius: 16px;
    text-align: center;
    transform: scale(0.9);
    transition: transform 0.3s;
    max-width: 320px;
    width: 90%;
    border: 1px solid var(--color-border);
}

.modal-overlay.active .modal-content {
    transform: scale(1);
}

.modal-close {
    position: absolute;
    top: -40px;
    right: 0;
    background: none;
    border: none;
    color: var(--color-text);
    font-size: 2rem;
    cursor: pointer;
    opacity: 0.7;
    transition: opacity 0.2s;
}

.modal-close:hover {
    opacity: 1;
}

.modal-content {
    position: relative;
}

.qrcode-wrapper {
    margin-bottom: 1rem;
}

.qrcode-wrapper img {
    width: 200px;
    height: 200px;
    border-radius: 8px;
}

.modal-title {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: 0.5rem;
}

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

/* ============================================
   Footer
   ============================================ */
.site-footer {
    padding: 60px 48px;
    text-align: center;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
    background: var(--color-bg);
}

.footer-text {
    font-size: 13px;
    color: var(--color-text-secondary);
    letter-spacing: 2px;
    margin-bottom: 16px;
}

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

.site-footer a:hover {
    color: var(--color-text);
}

.beian {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 16px;
    flex-wrap: wrap;
    font-size: 12px;
    color: var(--color-text-secondary);
}

.beian-icon {
    width: 14px;
    height: 14px;
    vertical-align: middle;
}

.beian-divider {
    color: rgba(255, 255, 255, 0.2);
}

@media (max-width: 768px) {
    .site-footer {
        padding: 40px 20px;
    }

    .footer-text {
        font-size: 12px;
        margin-bottom: 12px;
    }

    .beian {
        flex-direction: column;
        gap: 8px;
        font-size: 11px;
    }

    .beian-divider {
        display: none;
    }
}

/* ============================================
   Article Button Fix
   ============================================ */
.article-cta .btn {
    cursor: pointer;
    border: none;
    font-family: inherit;
}

/* ============================================
   Strong/Bold Fix
   ============================================ */
.article-content strong {
    font-weight: 600;
    color: #fff;
}

.block-highlight strong {
    color: var(--color-accent);
}

/* ============================================
   Table Styles
   ============================================ */
.article-content table {
    width: 100%;
    border-collapse: collapse;
    margin: 2rem 0;
}

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

.article-content th {
    background: var(--color-code-bg);
    font-weight: 600;
    color: #fff;
}

.article-content tr:nth-child(even) {
    background: rgba(255, 255, 255, 0.02);
}