:root {
    --bg: #0a0a0b;
    --bg-secondary: #141416;
    --bg-card: #1c1c1f;
    --text: #fafafa;
    --text-secondary: #a1a1aa;
    --text-muted: #71717a;
    --border: #27272a;
    --accent: #f7931a;
}

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

body {
    font-family: 'Noto Sans SC', 'Source Han Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.8;
}

/* Navigation */
nav {
    position: fixed;
    top: 0;
    width: 100%;
    padding: 1.5rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: rgba(10, 10, 11, 0.9);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border);
    z-index: 100;
}

.logo {
    font-weight: 600;
    font-size: 1.25rem;
    letter-spacing: 0.05em;
    text-decoration: none;
    color: var(--text);
    font-family: 'Noto Serif SC', 'Source Han Serif SC', 'STSong', 'SimSun', serif;
}

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

.nav-back {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.9rem;
}

.nav-back:hover { color: var(--accent); }

/* Article Layout */
article {
    max-width: 800px;
    margin: 0 auto;
    padding: 8rem 2rem 4rem;
}

.article-header {
    margin-bottom: 3rem;
    padding-bottom: 2rem;
    border-bottom: 1px solid var(--border);
}

.article-date {
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-bottom: 1rem;
}

.article-title {
    font-size: 2rem;
    font-weight: 600;
    line-height: 1.4;
    margin-bottom: 1rem;
    color: var(--text);
    font-family: 'Noto Serif SC', 'Source Han Serif SC', 'STSong', 'SimSun', serif;
}

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

.article-content {
    font-size: 1.05rem;
    line-height: 1.9;
    color: var(--text-secondary);
}

.article-content h2,
.article-content h3 {
    color: var(--text);
    margin: 2rem 0 1rem;
    font-family: 'Noto Serif SC', 'Source Han Serif SC', 'STSong', 'SimSun', serif;
}

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

.article-content a {
    color: var(--accent);
    text-decoration: none;
}

.article-content a:hover {
    text-decoration: underline;
}

.article-content img {
    max-width: 100%;
    height: auto;
    border-radius: 8px;
    margin: 1.5rem 0;
}

footer {
    text-align: center;
    padding: 3rem 2rem;
    border-top: 1px solid var(--border);
    color: var(--text-muted);
    font-size: 0.85rem;
    margin-top: 4rem;
}

@media (max-width: 600px) {
    .article-title { font-size: 1.5rem; }
    article { padding: 6rem 1.5rem 3rem; }
}

/* Footer */
footer {
    text-align: center;
    padding: 3rem 2rem;
    border-top: 1px solid var(--border);
    margin-top: 4rem;
}

.footer-content {
    max-width: 800px;
    margin: 0 auto;
}

.footer-links {
    margin-bottom: 1rem;
    font-size: 1rem;
}

.footer-links a,
.footer-links a:link,
.footer-links a:visited,
.footer-links a:active,
.footer-links a:focus {
    color: var(--text-secondary) !important;
    text-decoration: none !important;
    transition: color 0.3s;
    font-family: 'Noto Serif SC', 'Source Han Serif SC', 'STSong', 'SimSun', serif;
}

.footer-links a:hover {
    color: var(--accent) !important;
}

.footer-links .divider {
    color: var(--text-muted);
    margin: 0 0.5rem;
}

.copyright {
    color: var(--text-muted);
    font-size: 0.85rem;
}