:root{--fg:#20242b;--muted:#7a8290;--line:#e6e9ef;--bg:#fbfbfc;--accent:#2c6bed;--card:#fff}
*{box-sizing:border-box}
body{margin:0;font:16px/1.75 -apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;color:var(--fg);background:var(--bg)}
a{color:var(--accent);text-decoration:none}
a:hover{text-decoration:underline}
img{max-width:100%;height:auto}
.wrap{max-width:960px;margin:0 auto;padding:0 20px}
.site-header{background:var(--card);border-bottom:1px solid var(--line)}
.header-inner{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:22px 20px}
.brand-name{font-size:1.35rem;font-weight:700;color:var(--fg);display:block}
.brand-slogan{color:var(--muted);font-size:.86rem}
.header-search{display:flex;gap:6px}
.header-search input,.search-form input,.filter-bar input,.filter-bar select{border:1px solid var(--line);border-radius:6px;padding:6px 10px;font-size:.9rem;background:#fff}
.header-search button,.search-form button,.filter-bar button,.btn{border:0;background:var(--accent);color:#fff;border-radius:6px;padding:7px 14px;cursor:pointer;font-size:.9rem}
.site-nav{border-top:1px solid var(--line)}
.site-nav .wrap{display:flex;flex-wrap:wrap;gap:18px;padding:10px 20px}
.site-nav a{color:var(--muted);font-size:.92rem}
.layout{display:grid;grid-template-columns:minmax(0,1fr) 260px;gap:36px;align-items:start;padding:32px 20px 60px}
.main{min-width:0}
/* 卡片：封面在上、文字在下。有封面时去掉上内边距，让图贴边更整。
   封面对图片走 object-fit 裁切，保证列表里每张高度一致、不被不同长宽比撑乱。 */
.post-card{background:var(--card);border:1px solid var(--line);border-radius:10px;padding:22px 24px;margin-bottom:18px;overflow:hidden}
.post-card.has-cover{padding-top:0}
.post-cover{display:block;margin:0 -24px 16px;background:#eef1f6}
.post-cover img,.post-cover video{display:block;width:100%;height:220px;object-fit:cover}
.post-card-body{min-width:0}
.post-more{margin:12px 0 0;font-size:.9rem}
.post-more a{color:var(--accent)}
.post-title{margin:0 0 8px;font-size:1.25rem;line-height:1.45}
.post-title a{color:var(--fg)}
.post-meta{color:var(--muted);font-size:.83rem;margin:0 0 12px}
.post-meta a{color:var(--muted)}
.post-excerpt{margin:0;color:#414a58}
.post-tags{margin:12px 0 0;font-size:.85rem}
.post-tags a{color:var(--muted);margin-right:8px}
/* 文章详情页的封面：不裁切，保持原始比例完整展示 */
.post-cover-full{margin:0 0 20px}
.post-cover-full img,.post-cover-full video{display:block;width:100%;height:auto;border-radius:8px}
.post-full{background:var(--card);border:1px solid var(--line);border-radius:10px;padding:26px 28px}
.page-head{margin:0 0 18px}
.page-head h1{font-size:1.6rem;margin:0 0 6px;line-height:1.4}
.subtitle{color:var(--muted);margin:0}
.post-content{font-size:1.02rem;word-wrap:break-word}
.post-content h2,.post-content h3{margin:1.6em 0 .6em;line-height:1.4}
.post-content pre{background:#1f2430;color:#e8eaf0;padding:14px 16px;border-radius:8px;overflow:auto;font-size:.88rem}
.post-content code{background:#f2f4f8;padding:2px 5px;border-radius:4px;font-size:.88em}
.post-content pre code{background:none;color:inherit;padding:0}
.post-content blockquote{margin:1em 0;padding:2px 16px;border-left:3px solid var(--line);color:var(--muted)}
.post-content img{border-radius:8px}
.post-content hr{border:0;border-top:1px solid var(--line);margin:2em 0}
.badge,.tag{display:inline-block;font-size:.75rem;padding:1px 7px;border-radius:10px;background:#eef1f6;color:var(--muted)}
.tag-ok{background:#e6f6ec;color:#1a7f45}
.tag-warn{background:#fdf1e3;color:#a5620f}
.post-nav{display:flex;justify-content:space-between;gap:16px;margin:18px 0;font-size:.9rem}
.sidebar{display:flex;flex-direction:column;gap:18px}
.widget{background:var(--card);border:1px solid var(--line);border-radius:10px;padding:16px 18px}
.widget h2{font-size:.95rem;margin:0 0 10px;color:var(--muted);font-weight:600}
.widget-list{list-style:none;margin:0;padding:0;font-size:.9rem}
.widget-list li{display:flex;justify-content:space-between;gap:10px;padding:5px 0;color:#414a58}
.widget-list a{color:#414a58}
.count{color:var(--muted);font-size:.82rem}
.widget-text{font-size:.9rem;color:#414a58;line-height:1.6}
.widget-text p{margin:0 0 8px}
.widget-text p:last-child{margin-bottom:0}
.widget-list .who{color:var(--muted);font-size:.82rem;flex:none}
.tag-cloud{display:flex;flex-wrap:wrap;gap:8px;font-size:.86rem}
.tag-cloud a{background:#f2f4f8;padding:3px 9px;border-radius:12px;color:#414a58}
.tag-cloud-large a{font-size:1rem;padding:6px 14px}
.archive-list{list-style:none;padding:0;background:var(--card);border:1px solid var(--line);border-radius:10px}
.archive-list li{display:flex;justify-content:space-between;padding:12px 18px;border-bottom:1px solid var(--line)}
.archive-list li:last-child{border-bottom:0}
.pagination{display:flex;gap:10px;align-items:center;justify-content:center;margin:24px 0;font-size:.9rem}
.pagination .current{color:var(--muted)}
.empty{color:var(--muted);padding:20px;background:var(--card);border:1px dashed var(--line);border-radius:10px;text-align:center}
.flash{padding:10px 14px;border-radius:8px;font-size:.9rem}
.flash-success{background:#e6f6ec;color:#1a7f45}
.flash-error{background:#fdeaea;color:#a52626}
.notice{background:#fdf7e3;padding:12px 16px;border-radius:8px;color:#7a5c12}
.comments{margin-top:32px;background:var(--card);border:1px solid var(--line);border-radius:10px;padding:22px 24px}
.comments h2{font-size:1.05rem;margin:0 0 14px}
.comment-list,.comment-children{list-style:none;margin:0;padding:0}
.comment{display:flex;gap:12px;padding:14px 0;border-bottom:1px solid var(--line)}
.comment-children{padding-left:8px;margin-top:8px}
.comment-children .comment{border-bottom:0;padding:10px 0}
.avatar{border-radius:50%;flex:none}
.comment-meta{margin:0 0 4px;font-size:.85rem;color:var(--muted)}
.comment-meta .who{font-weight:600;color:var(--fg);margin-right:8px}
.comment-text{margin:0;white-space:pre-wrap}
.comment-actions{margin:6px 0 0}
.reply-toggle{background:none;border:0;color:var(--accent);cursor:pointer;font-size:.82rem;padding:0}
.comment-form{margin-top:18px}
.comment-form textarea,.comment-form input{width:100%;border:1px solid var(--line);border-radius:6px;padding:9px 11px;font:inherit;font-size:.92rem}
.form-row{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:10px;margin-bottom:10px}
.comment-form label{display:block;font-size:.85rem;color:var(--muted)}
.form-actions{display:flex;align-items:center;gap:12px;margin-top:10px}
.form-actions button{border:0;background:var(--accent);color:#fff;border-radius:6px;padding:9px 20px;cursor:pointer}
.search-form{display:flex;gap:8px;margin-bottom:18px}
.twitter-list{list-style:none;padding:0}
.twitter-item{background:var(--card);border:1px solid var(--line);border-radius:10px;padding:16px 20px;margin-bottom:14px}
.twitter-meta{margin:0 0 8px;color:var(--muted);font-size:.82rem}
.twitter-body{white-space:pre-wrap}
.twitter-img{border-radius:8px;max-width:320px}
.twitter-replies{list-style:none;padding:10px 0 0;margin:10px 0 0;border-top:1px solid var(--line);font-size:.9rem;color:#414a58}
.twitter-replies .who{color:var(--fg);font-weight:600;margin-right:8px}
.password-form{display:flex;gap:8px;max-width:340px}
.password-form input{flex:1;border:1px solid var(--line);border-radius:6px;padding:8px 10px}
.password-form button{border:0;background:var(--accent);color:#fff;border-radius:6px;padding:8px 16px;cursor:pointer}
.site-footer{border-top:1px solid var(--line);background:var(--card);color:var(--muted);font-size:.86rem}
.footer-grid{display:grid;grid-template-columns:minmax(0,1.4fr) minmax(0,1fr) minmax(0,1.2fr);gap:32px;padding:34px 20px}
.footer-brand{min-width:0}
.footer-name{margin:0;font-size:1.05rem;font-weight:700;color:var(--fg)}
.footer-slogan{margin:2px 0 0;color:var(--muted)}
.footer-desc{margin:8px 0 0;line-height:1.7}
.footer-title{margin:0 0 10px;font-size:.8rem;font-weight:600;letter-spacing:.06em;text-transform:uppercase;color:#a3abb8}
.footer-nav{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:6px 18px;align-content:start}
.footer-nav a{color:var(--muted)}
.footer-nav a:hover{color:var(--accent)}
.footer-meta p{margin:3px 0}
.footer-icp{display:inline-block;margin-top:6px;color:var(--muted)}
.footer-icp:hover{color:var(--accent)}
.error-detail{white-space:pre-wrap;background:#f6f7f9;padding:14px;border-radius:8px;font-size:.82rem;overflow:auto}

/* ---------- 头部用户区 ---------- */
.header-auth{display:flex;align-items:center;gap:12px;flex:none}
.header-user{color:var(--fg);font-size:.9rem;font-weight:600}
.header-login{color:var(--muted);font-size:.9rem}
.header-login:hover{color:var(--accent)}
.header-register{border:1px solid var(--accent);border-radius:6px;padding:4px 12px;font-size:.88rem}
.header-register:hover{background:var(--accent);color:#fff;text-decoration:none}
.header-link-btn{background:none;border:0;color:var(--muted);cursor:pointer;font-size:.88rem;padding:0;font-family:inherit}
.header-link-btn:hover{color:var(--accent)}

/* ---------- 登录 / 注册独立页 ---------- */
.auth-page{display:flex;align-items:center;justify-content:center;min-height:100vh;background:linear-gradient(160deg,#f0f3f8 0%,#e4ebf5 100%);padding:24px}
.auth-card{background:var(--card);border:1px solid var(--line);border-radius:16px;box-shadow:0 10px 40px rgba(16,24,40,.08);padding:30px 32px;width:100%;max-width:400px}
.auth-brand{display:block;text-align:center;font-size:.9rem;color:var(--muted);margin-bottom:4px}
.auth-card h1{font-size:1.3rem;text-align:center;margin:0 0 20px}
.auth-card form{display:flex;flex-direction:column;gap:14px}
.auth-card label{display:flex;flex-direction:column;gap:5px;font-size:.87rem;color:var(--muted)}
.auth-card input{border:1px solid var(--line);border-radius:8px;padding:10px 12px;font:inherit}
.auth-card input:focus{outline:none;border-color:var(--accent);box-shadow:0 0 0 3px rgba(53,101,224,.16)}
.auth-card button{border:0;background:var(--accent);color:#fff;border-radius:8px;padding:11px;cursor:pointer;font-size:.95rem;font-family:inherit;margin-top:4px}
.auth-card button:hover{background:#2b56c4}
.auth-alt{display:flex;justify-content:space-between;margin:16px 0 0;font-size:.88rem}

@media (max-width:820px){.layout{grid-template-columns:1fr}.sidebar{order:2}.footer-grid{grid-template-columns:1fr;gap:22px}}

/* ---------- 品牌：图文 Logo ---------- */
/* 有图时图文并排，图不参与拉伸；没图时这层 display:flex 也不影响原来的纯文字观感 */
.brand{display:inline-flex;align-items:center;gap:10px;text-decoration:none}
.brand:hover{text-decoration:none}
.brand-logo{
  height:40px;width:auto;max-width:180px;object-fit:contain;flex:none;
  border-radius:6px;
}
.brand-text{display:flex;flex-direction:column;min-width:0}
@media (max-width:520px){
  .brand-logo{height:32px;max-width:120px}
  .brand-name{font-size:1.15rem}
}

/* ---------- 窄屏（手机）适配 ---------- */
/* 头部在窄屏改为两行：品牌与账号一行、搜索独占一行。
   原来是品牌 / 搜索 / 账号挤一行，搜索框会被压成一个点，手指点不中。
   只调换顺序与换行，不动桌面端布局。 */
@media (max-width:640px){
  .header-inner{
    flex-wrap:wrap;
    padding:16px 16px 12px;
    gap:12px;
  }
  .brand{flex:1 1 auto;min-width:0}
  .header-auth{flex:none}
  .header-search{
    order:3;
    flex:1 1 100%;
  }
  .header-search input{flex:1;min-width:0}
  .site-nav .wrap{gap:12px;padding:9px 16px}
  /* 正文卡片内边距收紧，把宽度让给文字；行高同时略降，一屏能看到更多内容 */
  .wrap{padding:0 14px}
  .layout{padding:20px 14px 40px;gap:22px}
  .post-card{padding:18px 16px}
  .post-full{padding:20px 16px}
  .comments{padding:18px 16px}
  .page-head h1{font-size:1.35rem}
  .post-title{font-size:1.12rem}
  /* 上一篇/下一篇在窄屏上下堆叠，各自占满整行，比左右挤压好点 */
  .post-nav{flex-direction:column;gap:8px}
  .post-nav a{display:block}
  .archive-list li{padding:11px 14px}
  /* 评论表单的昵称/邮箱/网站本来就是自适应列，这里把最小宽度压低以免单列过宽后换行突兀 */
  .form-row{grid-template-columns:1fr;gap:8px}
}

/* 触屏设备上站内链接的点击区域略放大，减少误触 */
@media (hover:none){
  .site-nav a{padding:2px 0}
  .header-link-btn,.header-login,.header-register{padding:4px 6px}
}