*{margin:0;padding:0;box-sizing:border-box;font-family:system-ui,-apple-system}
body{background:#f6f8fa;color:#24292f;line-height:1.7}
.container{max-width:900px;margin:0 auto;padding:20px}
header{padding:24px 0;border-bottom:1px solid #ddd;margin-bottom:30px;display:flex;justify-content:space-between;align-items:center}
a{color:#0969da;text-decoration:none}
a:hover{text-decoration:underline}
.btn{display:inline-block;padding:8px 16px;background:#0969da;color:#fff;border:none;border-radius:6px;cursor:pointer;font-size:14px}
.btn-danger{background:#cf222e}
.btn-success{background:#1a7f37}
.btn:hover{opacity:0.9}

/* 文章列表 */
.article-list{gap:16px;display:grid}
.article-item{padding:20px;border:1px solid #e1e4e8;border-radius:8px;background:#fff}
.article-item h2{margin-bottom:8px}
.time{color:#656d76;font-size:14px;margin-bottom:12px}

/* Markdown内容 */
.markdown-body{background:#fff;padding:30px;border-radius:8px;border:1px solid #e1e4e8}
.markdown-body h1,h2,h3{margin:1.2em 0 0.6em}
.markdown-body p{margin-bottom:1em}
.markdown-body pre{background:#f1f1f1;padding:16px;border-radius:6px;overflow:auto}
.markdown-body code{background:#f1f1f1;padding:2px 6px;border-radius:4px}
.markdown-body img{max-width:100%;border-radius:6px;margin:8px 0;}
.markdown-body video{max-width:100%;border-radius:6px;margin:8px 0;}

/* 后台表单 */
.form-box{background:#fff;padding:24px;border-radius:8px;border:1px solid #e1e4e8;margin-bottom:24px}
textarea{width:100%;min-height:320px;padding:12px;border:1px solid #ddd;border-radius:6px;margin:12px 0;font-family:monospace;font-size:14px}
input[type="text"]{width:100%;padding:10px;border:1px solid #ddd;border-radius:6px;margin:8px 0}
.operate-bar{margin:16px 0;display:flex;gap:10px;flex-wrap:wrap}

/* 上传区域 */
.upload-area{border:2px dashed #ccc;padding:16px;border-radius:8px;margin:12px 0}
.upload-preview{display:flex;gap:12px;flex-wrap:wrap;margin-top:12px}
.upload-preview-item{width:120px;border:1px solid #eee;border-radius:6px;overflow:hidden}
.upload-preview-item img,.upload-preview-item video{width:100%;height:90px;object-fit:cover}
.tip{color:#666;font-size:13px;margin:6px 0}