/* ===== 变量 ===== */
:root {
  --bg: #f2f4f8;
  --card: #ffffff;
  --text: #1e293b;
  --muted: #94a3b8;
  --border: #e2e8f0;
  --primary: #4f46e5;
  --primary-l: #eef2ff;
  --primary-d: #3730a3;
  --danger: #ef4444;
  --shadow-sm: 0 1px 3px rgba(0,0,0,.04);
  --shadow-md: 0 4px 20px rgba(0,0,0,.07);
  --radius: 10px;
  --topbar-h: 60px;
}

/* ===== 基础重置 ===== */
*{box-sizing:border-box;margin:0;padding:0}
body{
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;
  background:var(--bg);color:var(--text);line-height:1.6;min-height:100vh;
}

/* ===== 顶栏 ===== */
.topbar{
  background:linear-gradient(135deg,#1e293b 0%,#334155 100%);
  position:sticky;top:0;z-index:100;
  height:var(--topbar-h);display:flex;align-items:center;
  box-shadow:0 2px 12px rgba(0,0,0,.12);
}
.topbar-inner{
  width:100%;max-width:1280px;margin:0 auto;padding:0 28px;
  display:flex;align-items:center;gap:24px;
}
.brand{
  font-size:20px;font-weight:800;color:#fff;text-decoration:none;
  letter-spacing:-.3px;white-space:nowrap;flex-shrink:0;
}
.search-box{flex:1;max-width:420px;position:relative;margin:0 auto}
.search-box input{
  width:100%;height:38px;padding:0 40px 0 16px;
  border:1px solid rgba(255,255,255,.15);border-radius:20px;
  font-size:14px;outline:none;background:rgba(255,255,255,.08);color:#fff;
  transition:border-color .15s,background .15s;
}
.search-box input::placeholder{color:rgba(255,255,255,.4)}
.search-box input:focus{border-color:var(--primary);background:rgba(255,255,255,.14)}
.search-icon{position:absolute;right:14px;top:50%;transform:translateY(-50%);width:18px;height:18px;pointer-events:none}
.admin-link{
  color:rgba(255,255,255,.7);text-decoration:none;font-size:14px;
  padding:6px 14px;border-radius:6px;transition:all .15s;flex-shrink:0;
}
.admin-link:hover{color:#fff;background:rgba(255,255,255,.1)}

/* ===== 单栏主布局 ===== */
.main-col{max-width:1280px;margin:0 auto;padding:36px 28px 60px;}

/* 分类导航标签 */
.cat-nav{
  display:flex;flex-wrap:wrap;gap:10px;margin-bottom:28px;
}
.cat-tab{
  padding:8px 18px;border:1.5px solid var(--border);border-radius:20px;
  background:var(--card);color:var(--text);cursor:pointer;
  font-size:14px;font-weight:500;transition:all .15s;
  white-space:nowrap;
}
.cat-tab:hover{border-color:var(--primary);color:var(--primary)}
.cat-tab.active{
  background:var(--primary);color:#fff;border-color:var(--primary);
}

/* ===== 密码门 ===== */
.gate-box{min-height:100vh;display:flex;align-items:center;justify-content:center;background:linear-gradient(135deg,#1e293b,#334155)}
.gate-card{background:var(--card);padding:44px 38px;border-radius:16px;box-shadow:var(--shadow-md);width:340px;text-align:center}
.gate-card h2{font-size:24px;font-weight:800;color:var(--text);margin:0 0 8px}
.gate-card p{color:var(--muted);font-size:14px;margin:0 0 24px}
.gate-card input{width:100%;padding:13px 14px;border:1.5px solid var(--border);border-radius:10px;font-size:15px;outline:none;margin-bottom:14px;transition:border-color .15s}
.gate-card input:focus{border-color:var(--primary);box-shadow:0 0 0 3px rgba(79,70,229,.1)}
.gate-card button{width:100%;padding:13px;border:none;border-radius:10px;background:var(--primary);color:#fff;font-size:15px;font-weight:600;cursor:pointer;transition:background .15s}
.gate-card button:hover{background:var(--primary-d)}
.gate-err{color:var(--danger);font-size:13px;margin-top:12px}

/* ===== 分类区块 ===== */
.cat{margin-bottom:44px}
.cat:last-child{margin-bottom:0}
.cat-header{display:flex;align-items:center;gap:10px;margin-bottom:18px}
.cat-dot{width:10px;height:10px;border-radius:3px;flex-shrink:0}
.cat-title{font-size:17px;font-weight:700;color:var(--text);margin:0}
.cat-count{
  font-size:12px;color:var(--muted);font-weight:400;
  background:#f1f5f9;padding:1px 8px;border-radius:10px;margin-left:6px;
}

/* ===== 网站卡片网格 ===== */
.site-grid{display:grid;gap:14px;grid-template-columns:repeat(auto-fill,minmax(190px,1fr))}
.site-card{
  display:flex;align-items:center;gap:12px;
  padding:15px 18px;background:var(--card);
  border:1px solid var(--border);border-radius:var(--radius);
  text-decoration:none;color:var(--text);
  box-shadow:var(--shadow-sm);
  transition:all .2s ease;position:relative;overflow:hidden;
}
.site-card::before{
  content:'';position:absolute;left:0;top:0;bottom:0;width:3px;
  background:var(--accent,var(--primary));border-radius:0 4px 4px 0;
  opacity:0;transition:opacity .18s;
}
.site-card:hover{
  transform:translateY(-3px);box-shadow:var(--shadow-md);
  border-color:var(--accent,var(--primary));
}
.site-card:hover::before{opacity:1}
.site-card:hover .card-name{color:var(--accent,var(--primary))}
.card-icon{
  width:36px;height:36px;border-radius:8px;
  background:var(--accent-l,var(--primary-l));
  display:flex;align-items:center;justify-content:center;
  font-size:16px;flex-shrink:0;color:var(--accent,var(--primary));font-weight:700;
}
.card-name{font-size:14px;font-weight:600;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;transition:color .15s}

/* 管理员删除按钮（卡片右上角 ×） */
.card-del{
  position:absolute;top:4px;right:4px;width:22px;height:22px;
  border:none;border-radius:4px;background:rgba(239,68,68,.9);color:#fff;
  font-size:14px;line-height:1;cursor:pointer;display:none;
  align-items:center;justify-content:center;z-index:2;
}
.site-card:hover .card-del{display:flex}
.card-del:hover{background:#dc2626}

/* ===== 空状态 ===== */
.loading-msg,.empty-msg{text-align:center;padding:60px 20px;color:var(--muted)}
.empty-msg a{color:var(--primary)}
.error-msg{color:var(--danger);text-align:center;padding:40px 20px}
.error-msg a{color:var(--primary);font-size:13px}
.no-result{text-align:center;padding:60px 20px;color:var(--muted);font-size:15px}
.no-result strong{color:var(--primary)}

/* ===== 页脚 ===== */
.site-footer{text-align:center;padding:28px 20px 40px;font-size:13px;color:var(--muted);border-top:1px solid var(--border)}
.site-footer a{color:var(--primary);text-decoration:none}

/* ===== 响应式 ===== */
@media(max-width:900px){
  .main-col{padding:24px 16px 48px}
  .topbar-inner{padding:0 16px;gap:12px}
  .search-box{max-width:none}
}
@media(max-width:600px){
  .site-grid{grid-template-columns:repeat(auto-fill,minmax(140px,1fr))}
  .brand{font-size:16px}
  .search-box{display:none}
}

/* ================================================================== */
/* 以下为后台及登录样式                                                 */
/* ================================================================== */

.login-box{min-height:100vh;display:flex;align-items:center;justify-content:center;background:var(--bg)}
.login-card{background:var(--card);padding:40px 36px;border-radius:16px;box-shadow:var(--shadow-md);width:340px;text-align:center}
.login-card h2{margin:0 0 24px;font-size:20px;color:var(--text)}
.login-card input{width:100%;padding:13px 14px;border:1.5px solid var(--border);border-radius:10px;margin-bottom:14px;font-size:15px;outline:none}
.login-card input:focus{border-color:var(--primary);box-shadow:0 0 0 3px rgba(79,70,229,.1)}
.login-card button{width:100%;padding:13px;border:none;border-radius:10px;background:var(--primary);color:#fff;font-size:15px;font-weight:600;cursor:pointer}
.login-card button:hover{background:var(--primary-d)}
.msg{color:var(--danger);font-size:13px;min-height:18px;margin:8px 0 0}

.admin-wrap{min-height:100vh}
.admin-wrap .container{max-width:960px;margin:0 auto;padding:0 20px}
.admin-wrap .site-header{background:#fff;border-bottom:1px solid var(--border);position:sticky;top:0;z-index:50}
.admin-wrap .header-inner{display:flex;align-items:center;justify-content:space-between;height:64px}
.admin-wrap .header-actions{display:flex;gap:10px;align-items:center}
.admin-wrap .logo{font-size:22px;margin:0;font-weight:800;color:var(--text)}

.panel{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);padding:28px;margin:28px 0;box-shadow:var(--shadow-sm)}
.panel h2{margin:0 0 18px;font-size:17px;display:flex;align-items:center;gap:8px}
.panel h2::before{content:'';width:4px;height:18px;background:var(--primary);border-radius:2px}

.row{display:flex;gap:10px;flex-wrap:wrap;align-items:center}
.site-form{display:flex;flex-wrap:wrap;gap:12px;margin-bottom:20px;align-items:flex-end}
.site-form input,.site-form select,.site-form .cat-cell{flex:1 1 140px;min-width:0;height:44px}
.site-form .cat-cell{display:flex;flex-direction:column;height:auto;padding:0}
.site-form .cat-cell>select{height:42px;width:100%;box-sizing:border-box;line-height:normal;-webkit-appearance:none;-moz-appearance:none;appearance:none}
.site-form .new-cat-input{height:42px;box-sizing:border-box;margin-top:6px}
.site-form button{flex:0 0 auto;margin-left:auto}
.site-form input,.site-form select,.row input{padding:10px 12px;border:1.5px solid var(--border);border-radius:8px;font-size:14px;outline:none}
.site-form input:focus,.site-form select:focus,.row input:focus{border-color:var(--primary);box-shadow:0 0 0 3px rgba(79,70,229,.08)}
.row button,.site-form button{padding:10px 20px;border:none;border-radius:8px;background:var(--primary);color:#fff;cursor:pointer;font-size:14px;font-weight:500;white-space:nowrap}
.row button:hover,.site-form button:hover{background:var(--primary-d)}
.cat-cell{display:flex;flex-direction:column;gap:6px}
.new-cat-input{width:100%}

.manage-list{list-style:none;margin:16px 0 0;padding:0}
.manage-list li{display:flex;align-items:center;gap:14px;padding:13px 0;border-top:1px solid var(--border)}
.manage-list li:first-child{border-top:none}
.manage-list .name{font-weight:600;flex:0 0 180px;font-size:14px}
.manage-list .name em{color:var(--muted);font-style:normal;font-weight:400;font-size:13px}
.manage-list .meta{color:var(--muted);font-size:13px;flex:1;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.manage-list .ops{margin-left:auto;display:flex;gap:8px}
.manage-list .ops button{padding:5px 13px;border:1px solid var(--border);border-radius:6px;background:transparent;cursor:pointer;font-size:13px;color:var(--text);transition:all .12s}
.manage-list .ops button:hover{border-color:var(--primary);color:var(--primary)}
.ops button[data-del-cat],.ops button[data-del-site]{color:var(--danger);border-color:#fca5a5}
.ops button[data-del-cat]:hover,.ops button[data-del-site]:hover{background:var(--danger);color:#fff;border-color:var(--danger)}

.btn-ghost{background:transparent;border:1px solid var(--border);color:var(--muted);padding:8px 16px;border-radius:8px;cursor:pointer;font-size:13px;transition:all .12s}
.btn-ghost:hover{color:var(--danger);border-color:#fca5a5}

/* 下拉 */
.site-form .dropdown{position:relative;width:100%}
.site-form .dropdown-toggle{width:100%;height:42px;padding:0 36px 0 12px;border:1.5px solid var(--border);border-radius:8px;background:#fff;color:var(--text);font-size:14px;text-align:left;cursor:pointer;font-family:inherit;line-height:normal;outline:none;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;background-image:url('data:image/svg+xml,%3Csvg xmlns=%22http://www.w3.org/2000/svg%22 width=%2212%22 height=%228%22 viewBox=%220 0 12 8%22%3E%3Cpath fill=%22%2364748b%22 d=%22M1 1l5 5 5-5%22/%3E%3C/svg%3E');background-repeat:no-repeat;background-position:right 12px center;-webkit-appearance:none;-moz-appearance:none;appearance:none}
.site-form .dropdown-toggle:hover{border-color:#c7d2fe;background:#f7f8fc}
.site-form .dropdown-toggle:focus{border-color:var(--primary);box-shadow:0 0 0 3px rgba(79,70,229,.08)}
.site-form .dropdown-menu{display:none;position:absolute;top:calc(100% + 4px);left:0;right:0;z-index:50;margin:0;padding:6px 0;list-style:none;background:#fff;border:1px solid var(--border);border-radius:8px;box-shadow:0 8px 24px rgba(0,0,0,.10);max-height:240px;overflow-y:auto}
.site-form .dropdown.open .dropdown-menu{display:block}
.site-form .dropdown-menu li{padding:9px 14px;font-size:14px;color:var(--text);cursor:pointer;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;transition:background .1s;background:transparent;border:none;border-radius:0;font-weight:400;text-align:left}
.site-form .dropdown-menu li:hover{background:var(--primary-l);color:var(--primary)}
.site-form .dropdown-menu li.opt-new{color:var(--primary);font-weight:500;border-top:1px solid var(--border);margin-top:4px;padding-top:10px}
.site-form .dropdown-menu li.opt-new:hover{background:var(--primary-l)}

/* 外观设置 */
.bg-form{display:flex;flex-direction:column;gap:16px;max-width:540px}
.bg-form label{font-size:14px;display:flex;align-items:center;gap:6px;cursor:pointer;font-weight:500}
.bg-form label input{width:16px;height:16px;cursor:pointer}
.bg-color-row,.bg-image-row{display:flex;align-items:center;gap:10px}
.bg-color-row span,.bg-image-row span{font-size:14px;color:var(--muted);min-width:84px}
.bg-form input[type=color]{width:50px;height:38px;border:1.5px solid var(--border);border-radius:8px;padding:2px;cursor:pointer;background:none}
.bg-form input[type=text]{flex:1;padding:10px 12px;border:1.5px solid var(--border);border-radius:8px;font-size:14px;outline:none}
.bg-form input[type=text]:focus{border-color:var(--primary);box-shadow:0 0 0 3px rgba(79,70,229,.08)}
.bg-form button{align-self:flex-start;padding:10px 22px;border:none;border-radius:8px;background:var(--primary);color:#fff;cursor:pointer;font-size:14px;font-weight:600}
.bg-form button:hover{background:var(--primary-d)}

/* 树形数据管理 */
.tree-cat{margin-bottom:4px}
.tree-cat-header{
  display:flex;align-items:center;gap:10px;padding:12px 16px;
  background:#f8fafc;border:1px solid var(--border);border-radius:8px;
  cursor:pointer;transition:all .12s;user-select:none;
}
.tree-cat-header:hover{background:#f1f5f9;border-color:#c7d2fe}
.tree-toggle{font-size:11px;color:var(--muted);width:16px;flex-shrink:0;text-align:center}
.tree-cat-name{font-weight:700;font-size:15px;flex:1}
.tree-count{font-size:12px;color:var(--muted);background:#e2e8f0;padding:1px 8px;border-radius:10px}
.tree-ops{display:flex;gap:6px;flex-shrink:0}
.tree-ops button{
  padding:4px 12px;border:1px solid var(--border);border-radius:6px;
  background:transparent;cursor:pointer;font-size:12px;color:var(--text);transition:all .1s
}
.tree-ops button:hover{border-color:var(--primary);color:var(--primary)}
.tree-ops button[data-del-cat]:hover,
.tree-ops button[data-del-site]:hover{border-color:var(--danger);color:var(--danger);background:#fef2f2}

.tree-sites{padding:4px 0 8px 24px}
.tree-site{
  display:flex;align-items:center;gap:14px;padding:9px 14px;
  border:1px solid transparent;border-radius:6px;transition:background .08s
}
.tree-site:hover{background:#f8fafc}
.tree-site-name{font-weight:600;font-size:14px;flex:1;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.tree-site-url{font-size:12px;color:var(--muted);max-width:280px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.tree-site-ops{display:flex;gap:4px;flex-shrink:0}
.tree-site-ops button{
  padding:3px 10px;border:1px solid var(--border);border-radius:5px;
  background:transparent;cursor:pointer;font-size:12px;color:var(--muted);transition:all .1s
}
.tree-site-ops button:hover{border-color:var(--primary);color:var(--primary)}
.tree-empty{padding:12px 14px;font-size:13px;color:var(--muted)}

/* 后台响应式 */
@media(max-width:720px){
  .site-form input,.site-form select,.site-form .cat-cell{flex:1 1 100%;height:auto}
  .site-form button{flex:1 1 100%;margin-left:0}
  .manage-list .name{flex-basis:120px}
  .manage-list .meta{display:none}
}