/* 文章內頁共用（與既有 article_* 版型對齊，減少重複 inline CSS） */
:root {
    --primary-color: #2c3e50;
    --accent-color: #3498db;
    --text-color: #333;
    --light-bg: #f8f9fa;
    --white: #ffffff;
}
* { margin: 0; padding: 0; box-sizing: border-box; }
body {
    font-family: 'Poppins', 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    color: var(--text-color);
    line-height: 1.6;
    background-color: var(--light-bg);
}
.navbar {
    background-color: var(--white);
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    padding: 1rem 0;
}
.navbar-brand { font-weight: 700; font-size: 1.5rem; color: var(--primary-color) !important; text-decoration: none; }
.navbar-nav .nav-link {
    color: var(--text-color);
    font-weight: 500;
    margin: 0 0.5rem;
    transition: color 0.3s ease;
}
.navbar-nav .nav-link:hover,
.navbar-nav .nav-link.active { color: var(--accent-color); }
.page-header {
    background: linear-gradient(135deg, var(--primary-color) 0%, #34495e 100%);
    color: var(--white);
    padding: 3rem 0;
    text-align: center;
}
.page-header h1 { font-size: 2rem; font-weight: 700; margin-bottom: 0.5rem; }
.doc-content { padding: 4rem 0; }
.doc-content .doc-body {
    background: var(--white);
    border-radius: 15px;
    padding: 2.5rem;
    box-shadow: 0 2px 10px rgba(0,0,0,0.05);
    border: 1px solid #e9ecef;
}
.doc-body h2 {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--primary-color);
    margin-top: 2rem;
    margin-bottom: 1rem;
    padding-bottom: 0.5rem;
    border-bottom: 2px solid var(--accent-color);
}
.doc-body h3 { font-size: 1.2rem; margin-top: 1.5rem; margin-bottom: 0.75rem; }
.doc-body .alert-note {
    background: #e8f4fd;
    border-left: 4px solid var(--accent-color);
    padding: 1rem 1.25rem;
    margin: 1rem 0;
    border-radius: 0 8px 8px 0;
}
.footer {
    background-color: var(--primary-color);
    color: var(--white);
    padding: 3rem 0 1.5rem;
    margin-top: 4rem;
}
.footer-links a { color: rgba(255,255,255,0.8); text-decoration: none; margin: 0 1rem; }
.footer-links a:hover { color: var(--white); }
.footer-copyright {
    margin-top: 2rem;
    padding-top: 2rem;
    border-top: 1px solid rgba(255,255,255,0.1);
    color: rgba(255,255,255,0.7);
}