:root{--fg:#222;--bg:#fff;--muted:#666;--brand:#0b74de;--border:#e5e7eb;--code:#0f172a;--surface:#fafafa}
*{box-sizing:border-box}
html,body{margin:0;padding:0}
body{font-family:system-ui,-apple-system,Segoe UI,Roboto,Ubuntu,Cantarell,"Noto Sans",sans-serif;color:var(--fg);background:var(--bg);line-height:1.6;min-height:100vh}
.container{max-width:880px;margin:0 auto;padding:0 16px}
.site-header,.site-footer{border-bottom:1px solid var(--border)}
.site-footer{border-top:1px solid var(--border);border-bottom:none;margin-top:32px;padding:16px 0;color:var(--muted)}
.site-header .brand{display:inline-block;padding:16px 0;color:var(--brand);text-decoration:none;font-weight:700}
h1,h2{line-height:1.25}
.post-list{list-style:none;padding:0;margin:16px 0}
.post-list li{display:flex;justify-content:space-between;padding:10px 0;border-bottom:1px dashed var(--border)}
.post-link{text-decoration:none;color:var(--fg)}
.post-date{color:var(--muted);font-size:.9em}
.post{margin-top:8px}
.markdown-body pre{background:var(--surface);padding:12px;border:1px solid var(--border);overflow:auto}
.markdown-body code{color:var(--code)}
.comments{margin-top:32px}
.comment-list{list-style:none;padding:0;margin:0}
.comment-item{padding:12px 0;border-bottom:1px solid var(--border)}
.comment-meta{color:var(--muted);font-size:.85em;margin-bottom:4px}
.comment-form textarea{width:100%;padding:8px;border:1px solid var(--border);border-radius:4px;resize:vertical}
.form-actions{display:flex;align-items:center;gap:12px;margin-top:8px}
button{background:var(--brand);border:none;color:#fff;padding:8px 14px;border-radius:6px;cursor:pointer}
button:hover{opacity:.92}
.status{font-size:.9em;color:var(--muted)}

/* 响应式图片样式 */
.markdown-body img{max-width:100%;height:auto;display:block;margin:16px auto;cursor:pointer;transition:opacity 0.3s ease}
.markdown-body img:hover{opacity:0.8}
.markdown-body img[width],.markdown-body img[height]{max-width:100%!important;height:auto!important}

/* 图片预览模态框 */
.image-modal{display:none;position:fixed;z-index:1000;left:0;top:0;width:100%;height:100%;background-color:rgba(0,0,0,0.9);cursor:pointer}
.image-modal-content{position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);max-width:90%;max-height:90%;object-fit:contain;transition:transform 0.3s ease}
.image-modal-close{position:absolute;top:20px;right:35px;color:#fff;font-size:40px;font-weight:bold;cursor:pointer;z-index:1001}
.image-modal-close:hover{opacity:0.7}

/* 移动端双指缩放支持 */
.image-modal-content{transform-origin:center;touch-action:pan-x pan-y}

/* 移动端优化 */
@media (max-width:768px){
  .container{padding:0 12px}
  .site-header .brand{padding:12px 0;font-size:1.1em}
  .post-list li{flex-direction:column;gap:4px}
  .post-date{font-size:.8em}
  .comment-form textarea{font-size:16px} /* 防止iOS缩放 */
  .form-actions{flex-direction:column;align-items:stretch;gap:8px}
  button{padding:12px 16px;font-size:16px}
  
  /* 移动端图片模态框优化 */
  .image-modal-content{max-width:95%;max-height:95%}
  .image-modal-close{top:10px;right:20px;font-size:30px}
}