:root{--ink:#24292f;--muted:#656d76;--line:#e6e8eb;--accent:#0969da;--bg:#fbfbfc;--card:#fff}
*{box-sizing:border-box}
body{margin:0;background:var(--bg);color:var(--ink);font:16px/1.75 system-ui,-apple-system,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif}
.wrap{max-width:760px;margin:0 auto;padding:0 20px}
a{color:var(--accent);text-decoration:none}
a:hover{text-decoration:underline}
.site-header{background:var(--card);border-bottom:1px solid var(--line)}
.site-header .wrap{display:flex;align-items:center;justify-content:space-between;height:58px}
.logo{font-weight:700;font-size:18px;color:var(--ink)}
nav a{margin-left:18px;color:var(--muted);font-size:15px}
nav a:hover{color:var(--accent);text-decoration:none}
main{padding:28px 20px 48px;min-height:calc(100vh - 160px)}
.card{background:var(--card);border:1px solid var(--line);border-radius:10px;padding:20px 24px;margin-bottom:20px}
.intro{border-left:3px solid var(--accent)}
h1.page-title{font-size:26px;margin:6px 0 18px}
.post-list{list-style:none;margin:0;padding:0}
.post-list li{padding:14px 4px;border-bottom:1px solid var(--line)}
.post-list a{font-size:17px;font-weight:600;color:var(--ink)}
.post-list .sum{color:var(--muted);font-size:14px;margin-top:2px}
.post-list .date{color:var(--muted);font-size:13px;float:right}
.meta{color:var(--muted);font-size:13px;margin-bottom:22px}
.article h1{font-size:24px}
.article h2{font-size:20px;border-bottom:1px solid var(--line);padding-bottom:6px}
.article h3{font-size:17px}
.article pre{background:#f2f3f5;border:1px solid var(--line);border-radius:8px;padding:14px;overflow:auto;font-size:14px}
.article code{background:#f2f3f5;border-radius:4px;padding:1px 5px;font-size:14px}
.article pre code{background:none;padding:0}
blockquote{margin:0;padding:8px 16px;border-left:3px solid var(--line);color:var(--muted);background:#f7f8fa}
.site-footer{border-top:1px solid var(--line);padding:18px 0;color:var(--muted);font-size:13px;text-align:center}
/* admin */
.admin-form label{display:block;font-size:14px;color:var(--muted);margin:14px 0 4px}
.admin-form input[type=text],.admin-form input[type=password],.admin-form textarea{width:100%;padding:9px 11px;border:1px solid var(--line);border-radius:8px;font:inherit;background:#fff}
.admin-form textarea{min-height:120px;resize:vertical}
.btn{display:inline-block;background:var(--accent);color:#fff;border:0;border-radius:8px;padding:9px 18px;font:inherit;cursor:pointer}
.btn:hover{opacity:.9}
.btn.light{background:#eef1f4;color:var(--ink)}
.btn.danger{background:#c93c37}
table.list{width:100%;border-collapse:collapse;background:var(--card);border:1px solid var(--line);border-radius:10px;overflow:hidden}
table.list th,table.list td{padding:10px 12px;border-bottom:1px solid var(--line);text-align:left;font-size:14px}
table.list th{background:#f5f6f8}
.badge{display:inline-block;padding:1px 8px;border-radius:10px;font-size:12px;background:#e7f1fb;color:var(--accent)}
.badge.off{background:#f0f1f3;color:var(--muted)}
.login-box{max-width:360px;margin:8vh auto}
.err{background:#fdebea;border:1px solid #f5c2c0;color:#a12622;border-radius:8px;padding:10px 14px;margin-bottom:14px;font-size:14px}
.ok{background:#e6f4ea;border:1px solid #b7dfc2;color:#1a7f37;border-radius:8px;padding:10px 14px;margin-bottom:14px;font-size:14px}