/* ==========================================================================
   Article / Lesson Styles — 少女粉白主题 ♡
   ========================================================================== */
.article-container {
    max-width: 800px;
    margin: 0 auto;
    padding: 3rem 2rem;
}

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

.article-meta {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1rem;
    color: var(--text-muted);
    font-size: 0.9rem;
}

.article-title {
    font-size: 2.5rem;
    margin-bottom: 1rem;
    color: var(--primary);
    line-height: 1.2;
}

.article-desc {
    font-size: 1.1rem;
    color: var(--text-muted);
}

.article-content {
    font-size: 1.05rem;
    line-height: 1.8;
    color: var(--text-main);
}

.article-content h2 {
    font-size: 1.8rem;
    margin: 3rem 0 1.5rem;
    padding-bottom: 0.5rem;
    border-bottom: 2px solid var(--border-color);
    color: var(--text-dark);
}

.article-content h3 {
    font-size: 1.4rem;
    margin: 2rem 0 1rem;
    color: var(--text-dark);
}

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

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

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

.article-content img {
    border-radius: 12px;
    margin: 2rem 0;
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-sm);
}

.article-content kbd {
    background-color: #FFF0F3;
    border: 1px solid var(--border-color);
    border-bottom-width: 2px;
    border-radius: 6px;
    padding: 2px 7px;
    font-family: monospace;
    font-size: 0.9em;
    color: var(--primary);
    white-space: nowrap;
}

.article-content .note-box {
    background: linear-gradient(135deg, #FFF5F7, #FFF0F8);
    border-left: 4px solid var(--primary);
    padding: 1.5rem;
    border-radius: 0 12px 12px 0;
    margin: 2rem 0;
    box-shadow: var(--shadow-sm);
}

.article-content .note-box h4 {
    margin-top: 0;
    margin-bottom: 0.5rem;
    color: var(--primary);
}

.article-content .note-box p:last-child {
    margin-bottom: 0;
}

.lesson-nav {
    display: flex;
    justify-content: space-between;
    margin-top: 4rem;
    padding-top: 2rem;
    border-top: 1px solid var(--border-color);
}

.back-btn {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--text-muted);
    font-weight: 500;
    padding: 0.5rem 1rem;
    border-radius: 20px;
    transition: var(--transition-fast);
}

.back-btn:hover {
    color: var(--primary);
    background: var(--primary-glow);
}