:root {
    --blog-primary: #24A1DE;
    --blog-text-dark: #0f172a;   
    --blog-text-main: #334155;   
    --blog-text-light: #64748b;  
    --blog-bg-body: #f0f2f5;     
    --blog-bg-card: #ffffff;     
    --blog-bg-sub: #f8fafc;      
    --blog-border: #cbd5e1;
    --blog-shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.05);
    --fs-h1-pc: 1.8rem;
    --fs-h2-pc: 1.35rem;
    --fs-h3-pc: 1.2rem;
    --fs-body-pc: 1rem;
    --fs-h1-mb: 1.6rem;
    --fs-h2-mb: 1.4rem;
    --fs-body-mb: 1rem;
}
body.dark-mode {
    --blog-text-dark: #e2e8f0;   
    --blog-text-main: #cbd5e1;   
    --blog-text-light: #94a3b8;
    --blog-bg-body: #0f172a;     
    --blog-bg-card: #1e293b;     
    --blog-bg-sub: #334155;      
    --blog-border: #334155;
    --blog-shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.3);
}
.blog-container {
    max-width: 1200px;
    margin: 40px auto 60px;
    padding: 0 15px;
}
.blog-header { text-align: center; margin-bottom: 40px; }
.blog-header h1 {
    font-size: var(--fs-h1-pc); font-weight: 800;
    color: var(--blog-text-dark); margin-bottom: 10px;
}
.blog-header p { color: var(--blog-text-main); font-size: 1rem; }
.blog-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 25px;
}
.blog-card {
    background: var(--blog-bg-card);
    border: 1px solid var(--blog-border);
    border-radius: 12px;
    overflow: hidden;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    display: flex; flex-direction: column; height: 100%;
}
.blog-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--blog-shadow);
    border-color: var(--blog-primary);
}
.blog-thumb-box {
    aspect-ratio: 16/9; overflow: hidden;
    background: var(--blog-bg-sub);
    position: relative;
    border-bottom: 1px solid var(--blog-border);
}
.blog-thumb-box img {
    width: 100%; height: 100%; object-fit: cover;
    transition: transform 0.5s ease;
}
.blog-card:hover .blog-thumb-box img { transform: scale(1.05); }
.blog-card-body {
    padding: 20px; display: flex; flex-direction: column; flex: 1;
}
.blog-date {
    font-size: 0.8rem; color: var(--blog-text-light);
    font-weight: 600; margin-bottom: 10px;
    text-transform: uppercase; letter-spacing: 0.5px;
}
.blog-card-title {
    font-size: 1.15rem; font-weight: 700;
    color: var(--blog-text-dark);
    margin-bottom: 10px; line-height: 1.4;
    display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden;
}
.blog-card-desc {
    font-size: 0.9rem; color: var(--blog-text-main);
    line-height: 1.6;
    display: -webkit-box; -webkit-line-clamp: 3; -webkit-box-orient: vertical; overflow: hidden;
    margin-bottom: 15px;
}
.blog-detail-wrapper { display: flex; flex-wrap: wrap; gap: 40px; }
.blog-main-col { flex: 1; min-width: 0; }
.blog-sidebar-col { width: 300px; flex-shrink: 0; }
.blog-nav { font-size: 0.85rem; color: var(--blog-text-light); margin-bottom: 15px; }
.blog-nav a { color: var(--blog-primary); text-decoration: none; font-weight: 500; }
.blog-nav span { color: var(--blog-text-dark); }
.blog-meta {
    display: flex; align-items: center; gap: 15px;
    margin-bottom: 25px; font-size: 0.85rem;
    color: var(--blog-text-light);
    border-bottom: 1px solid var(--blog-border);
    padding-bottom: 15px;
}
.blog-article h1 {
    font-size: var(--fs-h1-pc); line-height: 1.3; font-weight: 800;
    color: var(--blog-text-dark); margin-bottom: 15px;
}
.blog-content {
    font-size: var(--fs-body-pc); line-height: 1.75;
    color: var(--blog-text-main); 
}
.blog-content img {
    max-width: 100%; height: auto; display: block;
    margin: 25px auto; border-radius: 10px;
    box-shadow: var(--blog-shadow);
    border: 1px solid var(--blog-border);
}
.blog-content h2 {
    font-size: var(--fs-h2-pc); font-weight: 800;
    color: var(--blog-text-dark);
    margin-top: 40px; margin-bottom: 15px;
}
.blog-content h2::after {
    content: ''; display: block; width: 50px; height: 3px;
    background: var(--blog-primary); margin-top: 8px; border-radius: 2px;
}
.blog-content h3 {
    font-size: var(--fs-h3-pc); font-weight: 700;
    color: var(--blog-text-dark);
    margin-top: 35px; margin-bottom: 12px;
}
.blog-content p { margin-bottom: 20px; color: var(--blog-text-main); }
.blog-content ul, .blog-content ol { margin-bottom: 20px; padding-left: 20px; color: var(--blog-text-main); }
.blog-content li { margin-bottom: 8px; }
.blog-content blockquote {
    border-left: 4px solid var(--blog-primary);
    background: var(--blog-bg-sub); 
    padding: 15px 20px; font-style: italic;
    color: var(--blog-text-dark);
    margin: 25px 0; border-radius: 0 8px 8px 0;
}
.blog-content a {
    color: var(--blog-primary); text-decoration: underline; text-underline-offset: 2px;
}
.blog-content table {
    width: 100%; border-collapse: collapse;
    margin: 25px 0; font-size: 0.9rem;
    display: block; overflow-x: auto; white-space: nowrap;
}
.blog-content th {
    background: var(--blog-bg-sub);
    color: var(--blog-text-dark);
    font-weight: 700; padding: 10px 12px;
    border: 1px solid var(--blog-border); text-align: left;
}
.blog-content td {
    padding: 10px 12px;
    border: 1px solid var(--blog-border);
    color: var(--blog-text-main);
    background: var(--blog-bg-card);
}
#toc-container {
    background: var(--blog-bg-sub); 
    border: 1px solid var(--blog-border);
    border-radius: 12px; padding: 20px; margin-bottom: 35px;
}
#toc-container p { color: var(--blog-text-dark) !important; margin: 0 0 10px 0; }
.toc-link {
    display: block; padding: 6px 0;
    color: var(--blog-text-main);
    text-decoration: none; font-size: 0.95rem;
    transition: 0.2s; border-left: 2px solid transparent; padding-left: 10px;
}
.toc-link:hover {
    color: var(--blog-primary); border-left-color: var(--blog-primary);
    background: var(--blog-bg-card);
}
.toc-link.sub { padding-left: 25px; font-size: 0.9rem; color: var(--blog-text-light); }
.sidebar-sticky { position: sticky; top: 90px; }
.sidebar-title {
    font-size: 1.1rem; margin-bottom: 20px; font-weight: 700;
    color: var(--blog-text-dark);
    border-bottom: 2px solid var(--blog-border); padding-bottom: 10px;
}
.related-item {
    display: flex; align-items: center; gap: 12px; padding: 10px;
    background: var(--blog-bg-card);
    border: 1px solid var(--blog-border);
    border-radius: 10px; text-decoration: none; transition: 0.2s; margin-bottom: 10px;
}
.related-item:hover {
    border-color: var(--blog-primary);
    background: var(--blog-bg-sub);
}
.related-img { width: 42px; height: 42px; border-radius: 8px; object-fit: cover; }
.related-info { flex: 1; min-width: 0; }
.related-info h4 {
    font-size: 0.9rem; font-weight: 700; color: var(--blog-text-dark);
    margin: 0 0 3px; line-height: 1.2;
    white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}
.related-info span { font-size: 0.75rem; color: var(--blog-text-light); }
.blog-lang-switch { margin-bottom: 20px; }
.blog-lang-switch .lang-label {
    display: block; font-size: 11px; font-weight: 700;
    text-transform: uppercase; color: var(--blog-text-light);
    margin-bottom: 6px; letter-spacing: 0.5px;
}
.lang-options { display: flex; flex-wrap: wrap; gap: 6px; }
.lang-pill {
    display: inline-flex; align-items: center; justify-content: center; gap: 5px;
    padding: 5px 10px; height: 28px;
    background: var(--blog-bg-card);
    border: 1px solid var(--blog-border);
    border-radius: 6px;
    color: var(--blog-text-main);
    font-size: 12px; font-weight: 600; text-decoration: none !important;
    transition: all 0.2s ease;
}
.lang-pill:hover {
    border-color: var(--blog-primary); color: var(--blog-primary);
    background: var(--blog-bg-sub);
}
.lang-pill.active {
    background: var(--blog-primary); border-color: var(--blog-primary); color: #fff;
}
@media (max-width: 900px) {
    .blog-detail-wrapper { flex-direction: column; }
    .blog-sidebar-col { width: 100%; }
}
@media (max-width: 600px) {
    .blog-article h1 { font-size: var(--fs-h1-mb); }
    .blog-content { font-size: var(--fs-body-mb); }
    .blog-content h2 { font-size: var(--fs-h2-mb); }
    .blog-header h1 { font-size: 2rem; }
    .lang-options { gap: 5px; }
    .lang-pill {
        font-size: 11px; padding: 4px 8px; height: 26px;
        flex-grow: 1; text-align: center; max-width: 32%;
    }
}
.layout-hero { display: grid; gap: 20px; grid-template-columns: 1fr; }
.hero-main { grid-row: span 2; }
.hero-card { position: relative; height: 100%; min-height: 280px; border-radius: 12px; overflow: hidden; display: flex; flex-direction: column; justify-content: flex-end; padding: 20px; color: #fff; background: #000; text-decoration: none; }
.hero-card img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; opacity: 0.6; transition: 0.5s; }
.hero-card:hover img { opacity: 0.4; transform: scale(1.05); }
.hero-content { position: relative; z-index: 2; }
.hero-tag { background: var(--blog-primary); color: #fff; padding: 4px 8px; font-size: 0.75rem; font-weight: 700; border-radius: 4px; display: inline-block; margin-bottom: 8px; }
.layout-split { display: flex; flex-direction: column; gap: 20px; }
.split-card { display: flex; gap: 15px; align-items: center; padding: 10px; background: var(--blog-bg-card); border: 1px solid var(--blog-border); border-radius: 10px; text-decoration: none; transition: 0.2s; }
.split-card:hover { border-color: var(--blog-primary); transform: translateX(5px); }
.split-img { width: 100px; height: 80px; object-fit: cover; border-radius: 6px; flex-shrink: 0; background: var(--blog-bg-sub); }
.split-body h3 { font-size: 1rem; margin: 0 0 5px; color: var(--blog-text-dark); display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.layout-compact { display: grid; gap: 12px; }
.compact-item { padding: 12px 15px; background: var(--blog-bg-sub); border-radius: 8px; border-left: 3px solid transparent; text-decoration: none; display: flex; justify-content: space-between; align-items: center; }
.compact-item:hover { border-left-color: var(--blog-primary); background: var(--blog-bg-card); }
.compact-title { font-weight: 600; color: var(--blog-text-dark); font-size: 0.95rem; }
.compact-date { font-size: 0.8rem; color: var(--blog-text-light); }
@media (min-width: 768px) {
    .layout-hero { grid-template-columns: 2fr 1fr; grid-template-rows: 200px 200px; }
    .layout-split { display: grid; grid-template-columns: repeat(2, 1fr); }
    .layout-compact { grid-template-columns: repeat(2, 1fr); }
}
.faq-section { margin: 35px 0; }
.faq-heading { 
    font-size: var(--fs-h2-pc); font-weight: 800; 
    color: var(--blog-text-dark); margin-bottom: 20px; 
    display: flex; align-items: center; gap: 10px;
}
.faq-item {
    background: var(--blog-bg-card);
    border: 1px solid var(--blog-border);
    border-radius: 8px; margin-bottom: 10px;
    overflow: hidden; transition: all 0.2s ease;
}
.faq-item:hover { border-color: var(--blog-primary); }
.faq-item details { width: 100%; }
.faq-item summary {
    padding: 15px 20px; cursor: pointer;
    font-weight: 600; color: var(--blog-text-dark);
    list-style: none; position: relative;
    display: flex; justify-content: space-between; align-items: center;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after {
    content: '+'; font-size: 1.2rem; font-weight: 400; color: var(--blog-text-light);
    transition: transform 0.2s;
}
.faq-item details[open] summary { 
    border-bottom: 1px solid var(--blog-border); 
    background: var(--blog-bg-sub);
    color: var(--blog-primary);
}
.faq-item details[open] summary::after { 
    content: '−'; color: var(--blog-primary); transform: rotate(180deg); 
}
.faq-answer {
    padding: 15px 20px;
    color: var(--blog-text-main); line-height: 1.6;
    font-size: 0.95rem;
    animation: fadeIn 0.3s ease;
}
.table-responsive {
    width: 100%; overflow-x: auto;
    margin: 25px 0; border-radius: 8px;
    border: 1px solid var(--blog-border);
    box-shadow: 0 2px 5px rgba(0,0,0,0.02);
}
.pro-table {
    width: 100%; border-collapse: collapse; min-width: 600px; 
}
.pro-table thead {
    background: var(--blog-bg-sub);
}
.pro-table th {
    padding: 14px 16px; text-align: left;
    font-weight: 700; color: var(--blog-text-dark);
    border-bottom: 2px solid var(--blog-border);
    white-space: nowrap;
}
.pro-table td {
    padding: 12px 16px;
    border-bottom: 1px solid var(--blog-border);
    color: var(--blog-text-main);
    vertical-align: top;
}
.pro-table tr:nth-child(even) { background: var(--blog-bg-sub); }
.pro-table tr:hover { background: rgba(36, 161, 222, 0.05); }
body.dark-mode .pro-table tr:hover { background: rgba(255,255,255, 0.05); }
@keyframes fadeIn { from { opacity: 0; transform: translateY(-5px); } to { opacity: 1; transform: translateY(0); } }