/* 全站样式：系统字体、零外部资源，保证秒开 */
* { margin: 0; padding: 0; box-sizing: border-box; }
:root {
    --ink: #1f2328; --muted: #6a737d; --line: #e6e8eb;
    --accent: #0969da; --bg: #ffffff; --soft: #f6f8fa;
}
body {
    font-family: -apple-system, "Segoe UI", "Microsoft YaHei", "PingFang SC", sans-serif;
    color: var(--ink); background: var(--bg); line-height: 1.7;
}
.wrap { max-width: 760px; margin: 0 auto; padding: 0 16px; }
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

/* 顶栏 */
.site-header { border-bottom: 1px solid var(--line); background: var(--soft); }
.site-header .wrap { display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; padding-top: 12px; padding-bottom: 12px; }
.logo { font-size: 1.25rem; font-weight: 700; color: var(--ink); }
.logo:hover { text-decoration: none; }
.site-header nav a { margin-left: 14px; color: var(--muted); }
.site-header nav a:first-child { margin-left: 0; }

/* 文章卡片 */
main.wrap { padding-top: 28px; padding-bottom: 40px; min-height: 60vh; }
.post-card { padding: 18px 0; border-bottom: 1px solid var(--line); }
.post-card h2 { font-size: 1.3rem; line-height: 1.4; }
.post-card h2 a { color: var(--ink); }
.post-card h2 a:hover { color: var(--accent); text-decoration: none; }
.meta { display: flex; gap: 14px; align-items: center; font-size: .85rem; color: var(--muted); margin: 6px 0 10px; }
.meta .cat { background: var(--soft); border: 1px solid var(--line); border-radius: 999px; padding: 1px 10px; }
.summary { color: var(--muted); margin-bottom: 10px; }
.more { font-size: .9rem; }
.empty { color: var(--muted); text-align: center; padding: 60px 0; }

/* 分页 */
.pagination { display: flex; gap: 16px; justify-content: center; align-items: center; padding: 24px 0; color: var(--muted); }

/* 文章页 */
.page-title { font-size: 1.4rem; margin-bottom: 18px; }
.post-full h1 { font-size: 1.8rem; line-height: 1.35; margin-bottom: 8px; }
.post-full .meta { margin-bottom: 22px; }
.content h2, .content h3, .content h4 { margin: 1.4em 0 .5em; line-height: 1.4; }
.content p { margin: .8em 0; }
.content ul, .content ol { margin: .8em 0 .8em 1.6em; }
.content blockquote { border-left: 4px solid var(--line); padding: 4px 14px; color: var(--muted); margin: 1em 0; background: var(--soft); }
.content pre { background: #0d1117; color: #e6edf3; padding: 14px; border-radius: 8px; overflow-x: auto; margin: 1em 0; }
.content code { font-family: Consolas, "Courier New", monospace; font-size: .9em; background: var(--soft); padding: 2px 5px; border-radius: 4px; }
.content pre code { background: none; padding: 0; }
.content img { max-width: 100%; border-radius: 8px; }
.post-nav { display: flex; justify-content: space-between; gap: 12px; padding: 20px 0; border-top: 1px solid var(--line); margin-top: 8px; flex-wrap: wrap; }

/* 评论 */
#comments h2 { font-size: 1.2rem; margin: 24px 0 12px; }
.comment { background: var(--soft); border-radius: 8px; padding: 12px 14px; margin-bottom: 10px; }
.comment-meta { font-size: .85rem; color: var(--muted); margin-bottom: 4px; display: flex; gap: 10px; }
.comment-form { margin-top: 20px; }
.comment-form h3 { margin-bottom: 10px; }
input, textarea, select, button { font: inherit; }
input[type="text"], input[type="search"], input[type="password"], input[type="number"], textarea, select {
    width: 100%; padding: 9px 12px; border: 1px solid var(--line); border-radius: 8px; margin-bottom: 10px; background: #fff;
}
textarea { resize: vertical; }
button, .btn {
    display: inline-block; background: var(--soft); border: 1px solid var(--line); border-radius: 8px;
    padding: 8px 18px; cursor: pointer; color: var(--ink); text-decoration: none;
}
button:hover, .btn:hover { border-color: var(--muted); text-decoration: none; }
.btn.primary { background: var(--accent); border-color: var(--accent); color: #fff; }
.btn.small { padding: 4px 10px; font-size: .85rem; }
.captcha { margin-bottom: 10px; }
.captcha input { width: 90px; display: inline-block; }
.error { color: #c0392b; }
.success { color: #1a7f37; }
.link-danger { background: none; border: none; color: #c0392b; cursor: pointer; padding: 0; }
.link-danger:hover { text-decoration: underline; border: none; }
.inline { display: inline; }
.inline-form { display: flex; gap: 10px; margin-bottom: 18px; }
.inline-form input { margin-bottom: 0; }
.search-form { display: flex; gap: 10px; margin-bottom: 18px; }
.search-form input { margin-bottom: 0; }
.search-info { color: var(--muted); margin-bottom: 14px; }

/* 页脚 */
.site-footer { border-top: 1px solid var(--line); background: var(--soft); }
.site-footer .wrap { padding: 18px 16px; color: var(--muted); font-size: .88rem; }
.site-footer p { margin: 2px 0; }

/* ---------- 后台 ---------- */
.admin { background: var(--soft); }
.admin-header { background: #24292f; color: #fff; }
.admin-header .wrap { display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; padding-top: 12px; padding-bottom: 12px; }
.admin-header .logo { color: #fff; }
.admin-header nav a { color: #c9d1d9; margin-left: 14px; }
.admin-main { background: #fff; margin-top: 20px; margin-bottom: 30px; border-radius: 10px; padding: 24px !important; }
.admin-main h1 { font-size: 1.3rem; margin-bottom: 16px; }
.admin-toolbar { display: flex; justify-content: space-between; align-items: center; margin-bottom: 14px; }
.admin-table { width: 100%; border-collapse: collapse; }
.admin-table th, .admin-table td { text-align: left; padding: 10px 8px; border-bottom: 1px solid var(--line); vertical-align: middle; }
.admin-table th { color: var(--muted); font-weight: 600; font-size: .88rem; }
.badge { background: #fff8c5; border: 1px solid #d4a72c66; color: #7d4e00; font-size: .8rem; border-radius: 999px; padding: 1px 10px; }
.badge.ok { background: #dafbe1; border-color: #1a7f3744; color: #1a7f37; }
.login-box { max-width: 360px; margin: 60px auto; background: #fff; border: 1px solid var(--line); border-radius: 12px; padding: 28px; }
.login-box h1 { font-size: 1.3rem; margin-bottom: 14px; }
.login-box .hint { color: var(--muted); font-size: .85rem; margin-top: 12px; }
.post-form .big { font-size: 1.2rem; font-weight: 600; }
.form-row { display: flex; gap: 14px; flex-wrap: wrap; }
.form-row label { flex: 1; min-width: 180px; font-size: .88rem; color: var(--muted); }
.form-row label input, .form-row label select { margin-top: 4px; }
.form-actions { display: flex; gap: 10px; margin-top: 8px; }
.settings-form label { display: block; margin-bottom: 12px; }
.settings-form input { margin-top: 4px; }
.settings-form { margin-bottom: 30px; }

@media (max-width: 600px) {
    .site-header .wrap { flex-direction: column; gap: 6px; }
    .admin-table th:nth-child(4), .admin-table td:nth-child(4),
    .admin-table th:nth-child(5), .admin-table td:nth-child(5) { display: none; }
}