:root {
    --dark-bg: #0a0e17;
    --dark-bg-card: #111827;
    --dark-bg-hover: #1a2332;
    --dark-text: #ffffff;
    --dark-text-secondary: #94a3b8;
    --dark-text-muted: #64748b;
    --dark-accent: #00d4ff;
    --dark-accent-secondary: #7c3aed;
    --dark-accent-glow: rgba(0, 212, 255, 0.12);
    --dark-border: rgba(255, 255, 255, 0.06);
    --dark-gradient: linear-gradient(135deg, #00d4ff 0%, #7c3aed 100%);
    --dark-radius: 16px;
    --dark-radius-lg: 24px;
    --dark-shadow: 0 8px 40px rgba(0, 0, 0, 0.4);
    --dark-transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

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

body {
    background: var(--dark-bg);
    color: var(--dark-text-secondary);
    font-family: -apple-system, BlinkMacSystemFont, "Microsoft YaHei", "PingFang SC", sans-serif;
    line-height: 1.7;
    -webkit-font-smoothing: antialiased;
}

.dark-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

::-webkit-scrollbar {
    width: 8px;
}
::-webkit-scrollbar-track {
    background: var(--dark-bg);
}
::-webkit-scrollbar-thumb {
    background: var(--dark-accent);
    border-radius: 4px;
}

::selection {
    background: var(--dark-accent);
    color: #fff;
}

.dark-section-header {
    margin-bottom: 50px;
}
.dark-section-header.dark-section-center {
    text-align: center;
}
.dark-section-tag {
    display: inline-block;
    padding: 4px 16px;
    background: var(--dark-accent-glow);
    color: var(--dark-accent);
    border-radius: 50px;
    font-size: 12px;
    font-weight: 600;
    letter-spacing: 2px;
    text-transform: uppercase;
    margin-bottom: 12px;
    border: 1px solid rgba(0, 212, 255, 0.1);
}
.dark-section-header h2 {
    font-size: 38px;
    font-weight: 700;
    color: var(--dark-text);
    letter-spacing: -0.02em;
}

.dark-btn-primary {
    display: inline-block;
    padding: 14px 36px;
    background: var(--dark-gradient);
    color: #fff;
    border: none;
    border-radius: 50px;
    font-size: 15px;
    font-weight: 600;
    text-decoration: none;
    cursor: pointer;
    transition: var(--dark-transition);
    box-shadow: 0 4px 30px rgba(0, 212, 255, 0.2);
}
.dark-btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 50px rgba(0, 212, 255, 0.35);
    color: #fff;
}

.dark-btn-secondary {
    display: inline-block;
    padding: 14px 36px;
    background: rgba(255, 255, 255, 0.05);
    color: var(--dark-text);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 50px;
    font-size: 15px;
    font-weight: 500;
    text-decoration: none;
    transition: var(--dark-transition);
}
.dark-btn-secondary:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: rgba(255, 255, 255, 0.2);
    color: var(--dark-text);
}

.dark-pagination {
    display: flex;
    justify-content: center;
    gap: 8px;
    margin-top: 50px;
}
.dark-pagination .page-numbers {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 40px;
    height: 40px;
    padding: 0 14px;
    border-radius: 8px;
    background: var(--dark-bg-card);
    color: var(--dark-text-secondary);
    text-decoration: none;
    transition: var(--dark-transition);
    border: 1px solid var(--dark-border);
}
.dark-pagination .page-numbers.current {
    background: var(--dark-gradient);
    color: #fff;
    border-color: transparent;
}
.dark-pagination .page-numbers:hover:not(.current) {
    background: var(--dark-bg-hover);
    border-color: var(--dark-accent);
}

/* ===== PAGE ===== */
.dark-page {
    padding: 120px 0 80px;
    background: var(--dark-bg);
}

.dark-page-title {
    font-size: 36px;
    font-weight: 700;
    color: var(--dark-text);
    text-align: center;
    margin-bottom: 50px;
    letter-spacing: -0.02em;
}

.dark-about-content {
    max-width: 900px;
    margin: 0 auto;
    background: var(--dark-bg-card);
    padding: 40px 48px;
    border-radius: var(--dark-radius);
    border: 1px solid var(--dark-border);
}

.dark-about-content p {
    font-size: 16px;
    color: var(--dark-text-secondary);
    line-height: 2;
    margin-bottom: 16px;
}
.dark-about-content p:last-child {
    margin-bottom: 0;
}
.dark-about-content h2,
.dark-about-content h3 {
    color: var(--dark-text);
    margin: 24px 0 12px;
}
.dark-about-content h2 {
    font-size: 28px;
}
.dark-about-content h3 {
    font-size: 22px;
}
.dark-about-content ul,
.dark-about-content ol {
    color: var(--dark-text-secondary);
    padding-left: 24px;
    margin: 12px 0 16px;
}
.dark-about-content ul li,
.dark-about-content ol li {
    margin-bottom: 6px;
    line-height: 1.8;
}

.dark-contact-page .dark-contact-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
    max-width: 900px;
    margin: 0 auto;
}
.dark-contact-page .dark-contact-grid > div {
    background: var(--dark-bg-card);
    padding: 30px 32px;
    border-radius: var(--dark-radius);
    border: 1px solid var(--dark-border);
    transition: var(--dark-transition);
}
.dark-contact-page .dark-contact-grid > div:hover {
    border-color: rgba(0, 212, 255, 0.2);
    transform: translateY(-4px);
    box-shadow: var(--dark-shadow);
}
.dark-contact-page .dark-contact-grid h3 {
    font-size: 16px;
    color: var(--dark-text);
    margin-bottom: 8px;
}
.dark-contact-page .dark-contact-grid p {
    font-size: 15px;
    color: var(--dark-text-secondary);
    line-height: 1.6;
}

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

.dark-page-card {
    background: var(--dark-bg-card);
    border-radius: var(--dark-radius);
    overflow: hidden;
    border: 1px solid var(--dark-border);
    transition: var(--dark-transition);
}
.dark-page-card:hover {
    transform: translateY(-6px);
    border-color: rgba(0, 212, 255, 0.2);
    box-shadow: var(--dark-shadow);
}
.dark-page-card img {
    width: 100%;
    height: 200px;
    object-fit: cover;
}
.dark-page-card h3 {
    font-size: 18px;
    font-weight: 600;
    color: var(--dark-text);
    padding: 16px 20px 4px;
}
.dark-page-card p {
    font-size: 14px;
    color: var(--dark-text-secondary);
    padding: 0 20px;
    line-height: 1.7;
    margin-bottom: 12px;
}
.dark-page-card a {
    display: inline-block;
    margin: 0 20px 20px;
    color: var(--dark-accent);
    text-decoration: none;
    font-weight: 500;
    font-size: 14px;
    transition: var(--dark-transition);
}
.dark-page-card a:hover {
    color: #fff;
}

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

.dark-cert-item {
    background: var(--dark-bg-card);
    border-radius: var(--dark-radius);
    overflow: hidden;
    border: 1px solid var(--dark-border);
    text-align: center;
    padding-bottom: 20px;
    transition: var(--dark-transition);
}
.dark-cert-item:hover {
    transform: translateY(-6px);
    border-color: rgba(0, 212, 255, 0.2);
    box-shadow: var(--dark-shadow);
}
.dark-cert-item img {
    width: 100%;
    height: 220px;
    object-fit: cover;
}
.dark-cert-item h3 {
    font-size: 16px;
    font-weight: 600;
    color: var(--dark-text);
    padding: 16px 16px 4px;
}
.dark-cert-item a {
    display: inline-block;
    margin-top: 8px;
    color: var(--dark-accent);
    text-decoration: none;
    font-weight: 500;
    font-size: 14px;
    transition: var(--dark-transition);
}
.dark-cert-item a:hover {
    color: #fff;
}

.dark-news-list {
    max-width: 900px;
    margin: 0 auto;
}

.dark-news-item {
    background: var(--dark-bg-card);
    border-radius: var(--dark-radius);
    padding: 20px 28px;
    margin-bottom: 16px;
    border: 1px solid var(--dark-border);
    transition: var(--dark-transition);
}
.dark-news-item:hover {
    border-color: rgba(0, 212, 255, 0.2);
    transform: translateX(6px);
}
.dark-news-item a {
    text-decoration: none;
    color: inherit;
    display: flex;
    gap: 30px;
    align-items: flex-start;
}
.dark-news-date {
    font-size: 14px;
    color: var(--dark-accent);
    font-weight: 600;
    min-width: 80px;
    flex-shrink: 0;
}
.dark-news-item h3 {
    font-size: 18px;
    font-weight: 600;
    color: var(--dark-text);
    margin-bottom: 4px;
}
.dark-news-item p {
    font-size: 14px;
    color: var(--dark-text-secondary);
    line-height: 1.6;
    margin: 0;
}

/* ===== SINGLE ===== */
.dark-single {
    padding: 120px 0 80px;
    background: var(--dark-bg);
}

.dark-single-title {
    font-size: 36px;
    font-weight: 700;
    color: var(--dark-text);
    text-align: center;
    margin-bottom: 12px;
    letter-spacing: -0.02em;
}

.dark-single-meta {
    text-align: center;
    color: var(--dark-text-muted);
    font-size: 14px;
    margin-bottom: 40px;
}

.dark-single-layout {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 50px;
    align-items: flex-start;
    margin-bottom: 40px;
}

.dark-single-image {
    border-radius: var(--dark-radius);
    overflow: hidden;
    background: var(--dark-bg-card);
    border: 1px solid var(--dark-border);
}
.dark-single-image img {
    width: 100%;
    height: 380px;
    object-fit: cover;
    display: block;
}

.dark-single-content {
    background: var(--dark-bg-card);
    padding: 32px 36px;
    border-radius: var(--dark-radius);
    border: 1px solid var(--dark-border);
}
.dark-single-content p {
    font-size: 15px;
    color: var(--dark-text-secondary);
    line-height: 1.8;
    margin-bottom: 14px;
}
.dark-single-content p:last-child {
    margin-bottom: 0;
}
.dark-single-content strong {
    color: var(--dark-text);
}
.dark-single-content h2,
.dark-single-content h3 {
    color: var(--dark-text);
    margin: 24px 0 12px;
}
.dark-single-content h2 {
    font-size: 28px;
}
.dark-single-content h3 {
    font-size: 22px;
}
.dark-single-content ul,
.dark-single-content ol {
    color: var(--dark-text-secondary);
    padding-left: 24px;
    margin: 12px 0 16px;
}
.dark-single-content ul li,
.dark-single-content ol li {
    margin-bottom: 6px;
    line-height: 1.8;
}

.dark-single-content-full {
    background: var(--dark-bg-card);
    padding: 40px 48px;
    border-radius: var(--dark-radius);
    border: 1px solid var(--dark-border);
    margin-top: 30px;
}
.dark-single-content-full p {
    font-size: 16px;
    color: var(--dark-text-secondary);
    line-height: 2;
    margin-bottom: 16px;
}
.dark-single-content-full p:last-child {
    margin-bottom: 0;
}
.dark-single-content-full h2,
.dark-single-content-full h3 {
    color: var(--dark-text);
    margin: 28px 0 14px;
}
.dark-single-content-full h2 {
    font-size: 28px;
}
.dark-single-content-full h3 {
    font-size: 22px;
}
.dark-single-content-full img {
    max-width: 100%;
    height: auto;
    border-radius: var(--dark-radius);
    margin: 16px 0;
}
.dark-single-content-full ul,
.dark-single-content-full ol {
    color: var(--dark-text-secondary);
    padding-left: 24px;
    margin: 12px 0 16px;
}
.dark-single-content-full ul li,
.dark-single-content-full ol li {
    margin-bottom: 6px;
    line-height: 1.8;
}
.dark-single-content-full blockquote {
    border-left: 4px solid var(--dark-accent);
    padding: 12px 24px;
    margin: 16px 0;
    background: rgba(0, 212, 255, 0.04);
    border-radius: 0 var(--dark-radius) var(--dark-radius) 0;
    color: var(--dark-text-secondary);
}

.dark-single-nav {
    display: flex;
    justify-content: space-between;
    margin-top: 50px;
    padding-top: 30px;
    border-top: 1px solid var(--dark-border);
}
.dark-single-nav a {
    display: inline-block;
    padding: 10px 24px;
    background: var(--dark-bg-card);
    color: var(--dark-text-secondary);
    border: 1px solid var(--dark-border);
    border-radius: 50px;
    font-size: 14px;
    text-decoration: none;
    transition: var(--dark-transition);
}
.dark-single-nav a:hover {
    color: var(--dark-text);
    border-color: var(--dark-accent);
    background: var(--dark-accent-glow);
}

.dark-single .dark-single-image img {
    height: 420px;
}

/* ===== RESPONSIVE ===== */
@media (max-width: 992px) {
    .dark-page-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .dark-cert-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .dark-contact-page .dark-contact-grid {
        grid-template-columns: 1fr 1fr;
    }
    .dark-single-layout {
        grid-template-columns: 1fr;
        gap: 30px;
    }
    .dark-single-image img {
        height: 320px;
    }
    .dark-single-content-full {
        padding: 30px 24px;
    }
}

@media (max-width: 768px) {
    .dark-page {
        padding: 100px 0 60px;
    }
    .dark-page-title {
        font-size: 28px;
        margin-bottom: 30px;
    }
    .dark-page-grid {
        grid-template-columns: 1fr;
    }
    .dark-cert-grid {
        grid-template-columns: 1fr;
    }
    .dark-contact-page .dark-contact-grid {
        grid-template-columns: 1fr;
    }
    .dark-about-content {
        padding: 24px 20px;
    }
    .dark-news-item {
        padding: 16px 20px;
    }
    .dark-news-item a {
        flex-direction: column;
        gap: 6px;
    }
    .dark-news-date {
        min-width: auto;
    }
    .dark-single {
        padding: 100px 0 60px;
    }
    .dark-single-title {
        font-size: 28px;
    }
    .dark-single-image img {
        height: 240px;
    }
    .dark-single-content {
        padding: 24px 20px;
    }
    .dark-single-content-full {
        padding: 24px 16px;
    }
    .dark-single-content-full h2 {
        font-size: 24px;
    }
    .dark-single-content-full h3 {
        font-size: 20px;
    }
    .dark-single-nav {
        flex-direction: column;
        gap: 12px;
        align-items: center;
    }
    .dark-single-nav a {
        width: 100%;
        text-align: center;
    }
}

@media (max-width: 480px) {
    .dark-page-title {
        font-size: 24px;
    }
    .dark-about-content {
        padding: 18px 16px;
    }
    .dark-about-content h2 {
        font-size: 22px;
    }
    .dark-about-content h3 {
        font-size: 18px;
    }
    .dark-page-card img {
        height: 180px;
    }
    .dark-cert-item img {
        height: 180px;
    }
    .dark-single-title {
        font-size: 24px;
    }
    .dark-single-image img {
        height: 200px;
    }
    .dark-single-content {
        padding: 18px 16px;
    }
}