/* ================= SEO 落地页文章区 ================= */
.article {
    max-width: 760px;
    margin: 56px auto 0;
    padding: 0 4px;
}
.article-h1 {
    font-size: 28px;
    font-weight: 700;
    letter-spacing: -.4px;
    margin-bottom: 20px;
    color: var(--text);
    line-height: 1.35;
}
.article-content {
    font-size: 15.5px;
    line-height: 1.9;
    color: var(--text);
}
.article-content p {
    margin-bottom: 16px;
}
.article-content strong { color: var(--text); }
.article-content code {
    padding: 2px 6px;
    background: rgba(102,126,234,.1);
    color: var(--primary);
    border-radius: 4px;
    font-size: 13.5px;
    font-family: ui-monospace, Menlo, Consolas, monospace;
}
.article-content ul {
    padding-left: 22px;
    margin-bottom: 16px;
}
.article-content li {
    margin-bottom: 8px;
}

/* ---------- FAQ ---------- */
.article-faq {
    margin-top: 40px;
    padding-top: 32px;
    border-top: 1px solid var(--border);
}
.article-faq h2 {
    font-size: 20px;
    font-weight: 700;
    margin-bottom: 20px;
    color: var(--text);
}
.faq-list {
    display: flex;
    flex-direction: column;
    gap: 10px;
}
.faq-item {
    border: 1px solid var(--border);
    border-radius: 12px;
    background: #fff;
    overflow: hidden;
    transition: border-color .2s, box-shadow .2s;
}
.faq-item[open] {
    border-color: rgba(102,126,234,.4);
    box-shadow: 0 4px 12px -6px rgba(102,126,234,.3);
}
.faq-item summary {
    padding: 16px 20px;
    font-size: 15px;
    font-weight: 500;
    color: var(--text);
    cursor: pointer;
    list-style: none;
    position: relative;
    padding-right: 48px;
    transition: color .2s;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after {
    content: '';
    position: absolute;
    right: 20px;
    top: 50%;
    width: 8px;
    height: 8px;
    border-right: 2px solid var(--text-light);
    border-bottom: 2px solid var(--text-light);
    transform: translateY(-70%) rotate(45deg);
    transition: transform .2s;
}
.faq-item[open] summary::after {
    transform: translateY(-30%) rotate(-135deg);
}
.faq-item summary:hover { color: var(--primary); }
.faq-answer {
    padding: 0 20px 18px;
    font-size: 14.5px;
    line-height: 1.85;
    color: var(--text-light);
}

/* ---------- 相关工具 ---------- */
.article-related {
    margin-top: 40px;
    padding-top: 32px;
    border-top: 1px solid var(--border);
}
.article-related h2 {
    font-size: 18px;
    font-weight: 700;
    margin-bottom: 16px;
    color: var(--text);
}
.related-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 8px;
}
.related-list li a {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 10px 16px;
    border: 1px solid var(--border);
    border-radius: 10px;
    background: #fff;
    font-size: 14.5px;
    color: var(--text);
    transition: all .2s;
}
.related-list li a:hover {
    border-color: var(--primary);
    color: var(--primary);
    background: rgba(102,126,234,.04);
    transform: translateX(4px);
}

@media (max-width: 720px) {
    .article { margin-top: 40px; }
    .article-h1 { font-size: 22px; }
    .article-content { font-size: 15px; }
    .faq-item summary { font-size: 14.5px; padding: 14px 16px; padding-right: 44px; }
    .faq-answer { padding: 0 16px 16px; font-size: 14px; }
}