.book-summary { background: #f6f7f8; border-right: 1px solid #e2e7ee; }
.book-summary ul.summary li a { color: #263445; font-weight: 600; }
.book-summary ul.summary li.active>a { color: #176b5f; font-weight: 800; }
.book-body .page-wrapper .page-inner { max-width: 980px; }
.markdown-section { color: #263445; font-size: 17px; line-height: 1.85; }
.markdown-section h1 { font-size: 38px; letter-spacing: 0; margin-bottom: 18px; }
.markdown-section h2 { border-top: 1px solid #e2e7ee; padding-top: 24px; margin-top: 34px; }
.markdown-section blockquote { color: #5b4222; background: #fff8ec; border-left: 4px solid #b68424; padding: 14px 18px; border-radius: 8px; }
.markdown-section img { border: 1px solid #e2e7ee; border-radius: 8px; box-shadow: 0 8px 20px rgba(23,32,44,.08); }
.markdown-section a[href*="t3acc.xyz"] { color: #176b5f; font-weight: 800; }
.markdown-section > p:first-of-type a[href*="t3acc.xyz"], .markdown-section p > a[href="https://www.t3acc.xyz/"] { display: inline-block; padding: 8px 16px; background: #176b5f; color: #fff !important; border-radius: 8px; text-decoration: none; }