/* ========== AI.Type爱打字 SEO 文章全局样式（柔和深色主题，取自主站 theme-dark） ========== */
* { margin: 0; padding: 0; box-sizing: border-box; }
body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
    background: #22252D;
    color: #BABAD8;
    line-height: 1.8;
    min-height: 100vh;
}
.header {
    background: linear-gradient(135deg, #1C1C1F 0%, #2D2E31 100%);
    border-bottom: 1px solid #474759;
    padding: 14px 0;
    position: sticky;
    top: 0;
    z-index: 100;
}
.header-inner {
    max-width: 900px;
    margin: 0 auto;
    padding: 0 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}
.logo {
    font-size: 20px;
    font-weight: 700;
    color: #F2CB29;
    text-decoration: none;
    white-space: nowrap;
}
.header-nav {
    display: flex;
    align-items: center;
}
.header-nav a {
    color: #9c9cba;
    text-decoration: none;
    margin-left: 24px;
    font-size: 14px;
    transition: color 0.2s;
}
.header-nav a:last-child {
    color: #fff;
}
.header-nav a:hover { color: #F2CB29; }
/* 导航栏 CTA 按钮 */
.nav-cta-btn {
    display: inline-block;
    background: rgba(242, 203, 41, 0.08);
    border: 1px solid rgba(242, 203, 41, 0.2);
    color: #F2CB29;
    padding: 5px 16px;
    border-radius: 6px;
    font-size: 13px;
    font-weight: 600;
    text-decoration: none;
    margin-left: 24px;
    cursor: pointer;
    transition: background 0.2s, border-color 0.2s;
}
.nav-cta-btn:hover {
    background: rgba(242, 203, 41, 0.14);
    border-color: rgba(242, 203, 41, 0.35);
    text-decoration: none;
    color: #F2CB29;
}
.breadcrumb {
    max-width: 900px;
    margin: 0 auto;
    padding: 16px 24px 0;
    font-size: 13px;
    color: #9c9cba;
}
.breadcrumb a { color: #F2CB29; text-decoration: none; }
.breadcrumb a:hover { text-decoration: underline; }
.breadcrumb span { margin: 0 6px; }
article {
    max-width: 900px;
    margin: 0 auto;
    padding: 32px 24px 64px;
}
h1 {
    font-size: 28px;
    font-weight: 700;
    color: #ffffff;
    margin-bottom: 12px;
    line-height: 1.4;
}
.article-meta {
    font-size: 13px;
    color: #9c9cba;
    margin-bottom: 16px;
    padding-bottom: 0;
    border-bottom: none;
}
/* GEO: 作者专业度卡片（E-E-A-T 信号） */
.author-card {
    display: flex;
    align-items: flex-start;
    gap: 14px;
    background: #2D2E31;
    border: 1px solid #474759;
    border-radius: 10px;
    padding: 16px 20px;
    margin-bottom: 32px;
}
.author-card strong {
    display: block;
    color: #E8E8F0;
    font-size: 14px;
    margin-bottom: 4px;
}
.author-card span {
    font-size: 13px;
    color: #9c9cba;
    line-height: 1.6;
}
h2 {
    font-size: 22px;
    font-weight: 600;
    color: #E8E8F0;
    margin: 36px 0 16px;
    padding-left: 12px;
    border-left: 3px solid #F2CB29;
}
h3 {
    font-size: 18px;
    font-weight: 600;
    color: #D0D0E0;
    margin: 28px 0 12px;
}
p {
    margin-bottom: 16px;
    color: #BABAD8;
    font-size: 16px;
}
ul, ol {
    margin: 12px 0 20px 24px;
    color: #BABAD8;
}
li { margin-bottom: 8px; font-size: 15px; }
strong { color: #ffffff; }
/* ========== 文章配图 ========== */
figure {
    margin: 24px 0;
    text-align: center;
}
figure img {
    max-width: 100%;
    height: auto;
    border-radius: 8px;
    border: 1px solid #474759;
}
figcaption {
    font-size: 13px;
    color: #9c9cba;
    margin-top: 8px;
    font-style: italic;
}
/* 图片下方的独立说明文字（*图：xxx*） */
p > em:only-child {
    font-size: 13px;
    color: #9c9cba;
    display: block;
    text-align: center;
    margin: -12px 0 24px;
}
/* ========== 练习素材框 ========== */
.practice-box {
    background: rgba(242, 203, 41, 0.05);
    border: 1px solid rgba(242, 203, 41, 0.15);
    border-radius: 10px;
    padding: 20px 24px;
    margin: 20px 0;
}
.practice-box h4 {
    color: #F2CB29;
    font-size: 15px;
    margin-bottom: 12px;
    font-weight: 600;
}
.practice-box p {
    font-size: 15px;
    line-height: 2;
    color: #9c9cba;
    letter-spacing: 2px;
}
a { color: #F2CB29; text-decoration: none; }
a:hover { text-decoration: underline; }
blockquote {
    background: rgba(242, 203, 41, 0.06);
    border-left: 3px solid #F2CB29;
    padding: 16px 20px;
    margin: 20px 0;
    border-radius: 0 8px 8px 0;
    color: #9c9cba;
}
.cta-box {
    background: linear-gradient(135deg, rgba(242,203,41,0.08), rgba(69,184,108,0.06));
    border: 1px solid rgba(242,203,41,0.15);
    border-radius: 12px;
    padding: 24px;
    margin: 40px 0;
    text-align: center;
}
.cta-box h3 { margin-top: 0; color: #ffffff; }
.cta-box p { color: #BABAD8; }
.cta-btn {
    display: inline-block;
    background: linear-gradient(135deg, #F2CB29, #45B86C);
    color: #1C1C1F;
    padding: 12px 36px;
    border-radius: 8px;
    font-size: 16px;
    font-weight: 600;
    text-decoration: none;
    margin-top: 12px;
    transition: transform 0.2s, box-shadow 0.2s;
}
.cta-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(242,203,41,0.2);
    text-decoration: none;
}
.related {
    max-width: 900px;
    margin: 0 auto;
    padding: 0 24px 48px;
}
.related h3 {
    font-size: 18px;
    color: #E8E8F0;
    margin-bottom: 16px;
}
.related-list {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
    gap: 12px;
}
.related-list a {
    display: block;
    padding: 14px 18px;
    background: #2D2E31;
    border: 1px solid #474759;
    border-radius: 8px;
    color: #BABAD8;
    font-size: 14px;
    transition: all 0.2s;
}
.related-list a:hover {
    background: rgba(242,203,41,0.06);
    border-color: rgba(242,203,41,0.2);
    color: #F2CB29;
    text-decoration: none;
}
.footer {
    border-top: 1px solid #474759;
    padding: 32px 24px;
    text-align: center;
    color: #9c9cba;
    font-size: 13px;
}
.footer a { color: #9c9cba; margin: 0 12px; }
.footer a:hover { color: #F2CB29; }
/* ========== 文章目录 (TOC) ========== */
.toc {
    background: #2D2E31;
    border: 1px solid #474759;
    border-radius: 10px;
    padding: 20px 24px;
    margin: 24px 0 32px;
}
.toc h4 {
    font-size: 14px;
    color: #9c9cba;
    margin-bottom: 12px;
    font-weight: 600;
}
.toc ol {
    margin: 0;
    padding-left: 20px;
}
.toc li {
    font-size: 14px;
    color: #9c9cba;
    margin-bottom: 6px;
}
.toc a { color: #F2CB29; }
/* GEO: FAQ 问答区（AI 搜索引擎提取答案） */
.faq-section {
    margin: 40px 0 0;
    padding-top: 32px;
    border-top: 1px solid #474759;
}
.faq-section h2 {
    font-size: 20px;
    margin-bottom: 20px;
}
.faq-item {
    border: 1px solid #474759;
    border-radius: 8px;
    margin-bottom: 12px;
    overflow: hidden;
    background: #2D2E31;
}
.faq-item summary {
    padding: 14px 20px;
    font-size: 15px;
    font-weight: 600;
    color: #E8E8F0;
    cursor: pointer;
    background: #22252D;
    list-style: none;
    display: flex;
    align-items: center;
    gap: 10px;
}
.faq-item summary::before {
    content: 'Q';
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 22px;
    height: 22px;
    border-radius: 50%;
    background: rgba(242,203,41,0.12);
    color: #F2CB29;
    font-size: 12px;
    font-weight: 700;
    flex-shrink: 0;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item[open] summary { border-bottom: 1px solid #474759; }
.faq-answer {
    padding: 16px 20px;
    font-size: 15px;
    color: #9c9cba;
    line-height: 1.8;
}
/* ========== 文章列表页 ========== */
.article-list {
    max-width: 900px;
    margin: 0 auto;
    padding: 40px 24px;
}
.article-list h1 {
    color: #ffffff;
    font-size: 28px;
    margin-bottom: 8px;
}
.list-desc {
    color: #9c9cba;
    font-size: 15px;
    margin-bottom: 32px;
}
.article-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 20px;
}
.article-card {
    display: block;
    background: #2D2E31;
    border: 1px solid #474759;
    border-radius: 12px;
    overflow: hidden;
    text-decoration: none;
    transition: border-color 0.2s, transform 0.2s;
}
.article-card:hover {
    border-color: rgba(242, 203, 41, 0.3);
    transform: translateY(-2px);
    text-decoration: none;
}
.card-cover {
    width: 100%;
    aspect-ratio: 16 / 9;
    overflow: hidden;
    background: linear-gradient(135deg, #1C1C1F 0%, #2D2E31 100%);
}
.card-cover img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}
.card-body {
    padding: 16px 20px;
}
.card-body h2 {
    color: #E8E8F0;
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 8px;
    line-height: 1.4;
    border-left: none;
    padding-left: 0;
}
.card-body p {
    color: #9c9cba;
    font-size: 13px;
    line-height: 1.6;
    margin-bottom: 12px;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}
.card-date {
    color: #6b6b7d;
    font-size: 12px;
}
/* ========== 代码块 & 表格 ========== */
pre {
    background: #1C1C1F;
    border: 1px solid #474759;
    border-radius: 8px;
    padding: 16px 20px;
    overflow-x: auto;
    margin: 20px 0;
    line-height: 1.6;
    font-size: 14px;
}
pre code {
    background: none;
    padding: 0;
    color: #BABAD8;
}
code {
    background: rgba(242, 203, 41, 0.08);
    color: #F2CB29;
    padding: 2px 6px;
    border-radius: 4px;
    font-size: 0.9em;
    font-family: 'SF Mono', 'Fira Code', 'Consolas', monospace;
}
table {
    width: 100%;
    border-collapse: collapse;
    margin: 20px 0;
    font-size: 14px;
}
th {
    background: #2D2E31;
    color: #E8E8F0;
    text-align: left;
    padding: 10px 16px;
    border: 1px solid #474759;
    font-weight: 600;
}
td {
    padding: 10px 16px;
    border: 1px solid #474759;
    color: #BABAD8;
}
tr:nth-child(even) td {
    background: rgba(45, 46, 49, 0.5);
}
/* ========== 移动端适配 ========== */
@media (max-width: 640px) {
    h1 { font-size: 22px; }
    h2 { font-size: 18px; }
    article { padding: 20px 16px 48px; }
    .header { padding: 10px 0; }
    .header-inner { padding: 0 16px; }
    .logo { font-size: 16px; }
    .header-nav a { margin-left: 16px; font-size: 13px; }
    .nav-cta-btn { margin-left: 16px; padding: 5px 14px; font-size: 12px; }
    .breadcrumb { padding: 12px 16px 0; font-size: 12px; }
    .related { padding: 0 16px 32px; }
    .footer { padding: 24px 16px; }
    .footer a { margin: 0 8px; }
    .cta-box { padding: 20px 16px; margin: 32px 0; }
    .cta-btn { padding: 10px 28px; font-size: 15px; }
    .article-list { padding: 24px 16px; }
    .article-list h1 { font-size: 22px; }
    .article-grid { grid-template-columns: 1fr; gap: 16px; }
}